diff options
Diffstat (limited to 'fs')
139 files changed, 4910 insertions, 2075 deletions
diff --git a/fs/afs/dir.c b/fs/afs/dir.c index 34494fbead0a..0b74d3176ab7 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -685,16 +685,12 @@ not_found: spin_unlock(&dentry->d_lock); out_bad: - if (dentry->d_inode) { - /* don't unhash if we have submounts */ - if (have_submounts(dentry)) - goto out_skip; - } + /* don't unhash if we have submounts */ + if (check_submounts_and_drop(dentry) != 0) + goto out_skip; _debug("dropping dentry %s/%s", parent->d_name.name, dentry->d_name.name); - shrink_dcache_parent(dentry); - d_drop(dentry); dput(parent); key_put(key); diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c index 5e376bb93419..8defc6b3f9a2 100644 --- a/fs/bfs/inode.c +++ b/fs/bfs/inode.c @@ -40,7 +40,7 @@ struct inode *bfs_iget(struct super_block *sb, unsigned long ino) int block, off; inode = iget_locked(sb, ino); - if (IS_ERR(inode)) + if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; @@ -1045,12 +1045,22 @@ static int __bio_copy_iov(struct bio *bio, struct bio_vec *iovecs, int bio_uncopy_user(struct bio *bio) { struct bio_map_data *bmd = bio->bi_private; - int ret = 0; + struct bio_vec *bvec; + int ret = 0, i; - if (!bio_flagged(bio, BIO_NULL_MAPPED)) - ret = __bio_copy_iov(bio, bmd->iovecs, bmd->sgvecs, - bmd->nr_sgvecs, bio_data_dir(bio) == READ, - 0, bmd->is_our_pages); + if (!bio_flagged(bio, BIO_NULL_MAPPED)) { + /* + * if we're in a workqueue, the request is orphaned, so + * don't copy into a random user address space, just free. + */ + if (current->mm) + ret = __bio_copy_iov(bio, bmd->iovecs, bmd->sgvecs, + bmd->nr_sgvecs, bio_data_dir(bio) == READ, + 0, bmd->is_our_pages); + else if (bmd->is_our_pages) + bio_for_each_segment_all(bvec, bio, i) + __free_page(bvec->bv_page); + } bio_free_map_data(bmd); bio_put(bio); return ret; @@ -1946,7 +1956,7 @@ int bio_associate_current(struct bio *bio) /* associate blkcg if exists */ rcu_read_lock(); - css = task_subsys_state(current, blkio_subsys_id); + css = task_css(current, blkio_subsys_id); if (css && css_tryget(css)) bio->bi_css = css; rcu_read_unlock(); diff --git a/fs/block_dev.c b/fs/block_dev.c index c7bda5cd3da7..1173a4ee0830 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1519,7 +1519,7 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, blk_start_plug(&plug); ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos); - if (ret > 0 || ret == -EIOCBQUEUED) { + if (ret > 0) { ssize_t err; err = generic_write_sync(file, pos, ret); diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index 4253ad580e39..5f8f3341c099 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -747,7 +747,7 @@ int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info) WARN_ON(atomic_xchg( &fs_info->mutually_exclusive_operation_running, 1)); task = kthread_run(btrfs_dev_replace_kthread, fs_info, "btrfs-devrepl"); - return PTR_RET(task); + return PTR_ERR_OR_ZERO(task); } static int btrfs_dev_replace_kthread(void *data) diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 8e686a427ce2..4d2eb6417145 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1727,7 +1727,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, */ BTRFS_I(inode)->last_trans = root->fs_info->generation + 1; BTRFS_I(inode)->last_sub_trans = root->log_transid; - if (num_written > 0 || num_written == -EIOCBQUEUED) { + if (num_written > 0) { err = generic_write_sync(file, pos, num_written); if (err < 0 && num_written > 0) num_written = err; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 021694c08181..7bdc83d04d54 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3174,7 +3174,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root) found_key.type = BTRFS_INODE_ITEM_KEY; found_key.offset = 0; inode = btrfs_iget(root->fs_info->sb, &found_key, root, NULL); - ret = PTR_RET(inode); + ret = PTR_ERR_OR_ZERO(inode); if (ret && ret != -ESTALE) goto out; diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index d3f3b43cae0b..2e14fd89a8b4 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -219,7 +219,7 @@ static int fs_path_ensure_buf(struct fs_path *p, int len) len = PAGE_ALIGN(len); if (p->buf == p->inline_buf) { - tmp_buf = kmalloc(len, GFP_NOFS); + tmp_buf = kmalloc(len, GFP_NOFS | __GFP_NOWARN); if (!tmp_buf) { tmp_buf = vmalloc(len); if (!tmp_buf) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 78b871753cb6..67a085381845 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -3302,7 +3302,7 @@ int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info) } tsk = kthread_run(balance_kthread, fs_info, "btrfs-balance"); - return PTR_RET(tsk); + return PTR_ERR_OR_ZERO(tsk); } int btrfs_recover_balance(struct btrfs_fs_info *fs_info) diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c index d4c1206af9fc..43eb5592cdea 100644 --- a/fs/cachefiles/interface.c +++ b/fs/cachefiles/interface.c @@ -378,6 +378,31 @@ static void cachefiles_sync_cache(struct fscache_cache *_cache) } /* + * check if the backing cache is updated to FS-Cache + * - called by FS-Cache when evaluates if need to invalidate the cache + */ +static bool cachefiles_check_consistency(struct fscache_operation *op) +{ + struct cachefiles_object *object; + struct cachefiles_cache *cache; + const struct cred *saved_cred; + int ret; + + _enter("{OBJ%x}", op->object->debug_id); + + object = container_of(op->object, struct cachefiles_object, fscache); + cache = container_of(object->fscache.cache, + struct cachefiles_cache, cache); + + cachefiles_begin_secure(cache, &saved_cred); + ret = cachefiles_check_auxdata(object); + cachefiles_end_secure(cache, saved_cred); + + _leave(" = %d", ret); + return ret; +} + +/* * notification the attributes on an object have changed * - called with reads/writes excluded by FS-Cache */ @@ -522,4 +547,5 @@ const struct fscache_cache_ops cachefiles_cache_ops = { .write_page = cachefiles_write_page, .uncache_page = cachefiles_uncache_page, .dissociate_pages = cachefiles_dissociate_pages, + .check_consistency = cachefiles_check_consistency, }; diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h index 49382519907a..5349473df1b1 100644 --- a/fs/cachefiles/internal.h +++ b/fs/cachefiles/internal.h @@ -235,6 +235,7 @@ extern int cachefiles_set_object_xattr(struct cachefiles_object *object, struct cachefiles_xattr *auxdata); extern int cachefiles_update_object_xattr(struct cachefiles_object *object, struct cachefiles_xattr *auxdata); +extern int cachefiles_check_auxdata(struct cachefiles_object *object); extern int cachefiles_check_object_xattr(struct cachefiles_object *object, struct cachefiles_xattr *auxdata); extern int cachefiles_remove_object_xattr(struct cachefiles_cache *cache, diff --git a/fs/cachefiles/xattr.c b/fs/cachefiles/xattr.c index 2476e5162609..34c88b83e39f 100644 --- a/fs/cachefiles/xattr.c +++ b/fs/cachefiles/xattr.c @@ -157,6 +157,42 @@ int cachefiles_update_object_xattr(struct cachefiles_object *object, } /* + * check the consistency between the backing cache and the FS-Cache cookie + */ +int cachefiles_check_auxdata(struct cachefiles_object *object) +{ + struct cachefiles_xattr *auxbuf; + struct dentry *dentry = object->dentry; + unsigned int dlen; + int ret; + + ASSERT(dentry); + ASSERT(dentry->d_inode); + ASSERT(object->fscache.cookie->def->check_aux); + + auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, GFP_KERNEL); + if (!auxbuf) + return -ENOMEM; + + auxbuf->len = vfs_getxattr(dentry, cachefiles_xattr_cache, + &auxbuf->type, 512 + 1); + if (auxbuf->len < 1) + return -ESTALE; + + if (auxbuf->type != object->fscache.cookie->def->type) + return -ESTALE; + + dlen = auxbuf->len - 1; + ret = fscache_check_aux(&object->fscache, &auxbuf->data, dlen); + + kfree(auxbuf); + if (ret != FSCACHE_CHECKAUX_OKAY) + return -ESTALE; + + return 0; +} + +/* * check the state xattr on a cache file * - return -ESTALE if the object should be deleted */ diff --git a/fs/ceph/Kconfig b/fs/ceph/Kconfig index 49bc78243db9..ac9a2ef5bb9b 100644 --- a/fs/ceph/Kconfig +++ b/fs/ceph/Kconfig @@ -16,3 +16,12 @@ config CEPH_FS If unsure, say N. +if CEPH_FS +config CEPH_FSCACHE + bool "Enable Ceph client caching support" + depends on CEPH_FS=m && FSCACHE || CEPH_FS=y && FSCACHE=y + help + Choose Y here to enable persistent, read-only local + caching support for Ceph clients using FS-Cache + +endif diff --git a/fs/ceph/Makefile b/fs/ceph/Makefile index bd352125e829..32e30106a2f0 100644 --- a/fs/ceph/Makefile +++ b/fs/ceph/Makefile @@ -9,3 +9,4 @@ ceph-y := super.o inode.o dir.o file.o locks.o addr.o ioctl.o \ mds_client.o mdsmap.o strings.o ceph_frag.o \ debugfs.o +ceph-$(CONFIG_CEPH_FSCACHE) += cache.o diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 5318a3b704f6..6df8bd481425 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -11,6 +11,7 @@ #include "super.h" #include "mds_client.h" +#include "cache.h" #include <linux/ceph/osd_client.h> /* @@ -70,15 +71,16 @@ static int ceph_set_page_dirty(struct page *page) struct address_space *mapping = page->mapping; struct inode *inode; struct ceph_inode_info *ci; - int undo = 0; struct ceph_snap_context *snapc; + int ret; if (unlikely(!mapping)) return !TestSetPageDirty(page); - if (TestSetPageDirty(page)) { + if (PageDirty(page)) { dout("%p set_page_dirty %p idx %lu -- already dirty\n", mapping->host, page, page->index); + BUG_ON(!PagePrivate(page)); return 0; } @@ -107,35 +109,19 @@ static int ceph_set_page_dirty(struct page *page) snapc, snapc->seq, snapc->num_snaps); spin_unlock(&ci->i_ceph_lock); - /* now adjust page */ - spin_lock_irq(&mapping->tree_lock); - if (page->mapping) { /* Race with truncate? */ - WARN_ON_ONCE(!PageUptodate(page)); - account_page_dirtied(page, page->mapping); - radix_tree_tag_set(&mapping->page_tree, - page_index(page), PAGECACHE_TAG_DIRTY); - - /* - * Reference snap context in page->private. Also set - * PagePrivate so that we get invalidatepage callback. - */ - page->private = (unsigned long)snapc; - SetPagePrivate(page); - } else { - dout("ANON set_page_dirty %p (raced truncate?)\n", page); - undo = 1; - } - - spin_unlock_irq(&mapping->tree_lock); - - if (undo) - /* whoops, we failed to dirty the page */ - ceph_put_wrbuffer_cap_refs(ci, 1, snapc); + /* + * Reference snap context in page->private. Also set + * PagePrivate so that we get invalidatepage callback. + */ + BUG_ON(PagePrivate(page)); + page->private = (unsigned long)snapc; + SetPagePrivate(page); - __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); + ret = __set_page_dirty_nobuffers(page); + WARN_ON(!PageLocked(page)); + WARN_ON(!page->mapping); - BUG_ON(!PageDirty(page)); - return 1; + return ret; } /* @@ -150,11 +136,19 @@ static void ceph_invalidatepage(struct page *page, unsigned int offset, struct ceph_inode_info *ci; struct ceph_snap_context *snapc = page_snap_context(page); - BUG_ON(!PageLocked(page)); - BUG_ON(!PagePrivate(page)); - BUG_ON(!page->mapping); - inode = page->mapping->host; + ci = ceph_inode(inode); + + if (offset != 0 || length != PAGE_CACHE_SIZE) { + dout("%p invalidatepage %p idx %lu partial dirty page %u~%u\n", + inode, page, page->index, offset, length); + return; + } + + ceph_invalidate_fscache_page(inode, page); + + if (!PagePrivate(page)) + return; /* * We can get non-dirty pages here due to races between @@ -164,31 +158,28 @@ static void ceph_invalidatepage(struct page *page, unsigned int offset, if (!PageDirty(page)) pr_err("%p invalidatepage %p page not dirty\n", inode, page); - if (offset == 0 && length == PAGE_CACHE_SIZE) - ClearPageChecked(page); + ClearPageChecked(page); - ci = ceph_inode(inode); - if (offset == 0 && length == PAGE_CACHE_SIZE) { - dout("%p invalidatepage %p idx %lu full dirty page\n", - inode, page, page->index); - ceph_put_wrbuffer_cap_refs(ci, 1, snapc); - ceph_put_snap_context(snapc); - page->private = 0; - ClearPagePrivate(page); - } else { - dout("%p invalidatepage %p idx %lu partial dirty page %u(%u)\n", - inode, page, page->index, offset, length); - } + dout("%p invalidatepage %p idx %lu full dirty page\n", + inode, page, page->index); + + ceph_put_wrbuffer_cap_refs(ci, 1, snapc); + ceph_put_snap_context(snapc); + page->private = 0; + ClearPagePrivate(page); } -/* just a sanity check */ static int ceph_releasepage(struct page *page, gfp_t g) { struct inode *inode = page->mapping ? page->mapping->host : NULL; dout("%p releasepage %p idx %lu\n", inode, page, page->index); WARN_ON(PageDirty(page)); - WARN_ON(PagePrivate(page)); - return 0; + + /* Can we release the page from the cache? */ + if (!ceph_release_fscache_page(page, g)) + return 0; + + return !PagePrivate(page); } /* @@ -198,11 +189,16 @@ static int readpage_nounlock(struct file *filp, struct page *page) { struct inode *inode = file_inode(filp); struct ceph_inode_info *ci = ceph_inode(inode); - struct ceph_osd_client *osdc = + struct ceph_osd_client *osdc = &ceph_inode_to_client(inode)->client->osdc; int err = 0; u64 len = PAGE_CACHE_SIZE; + err = ceph_readpage_from_fscache(inode, page); + + if (err == 0) + goto out; + dout("readpage inode %p file %p page %p index %lu\n", inode, filp, page, page->index); err = ceph_osdc_readpages(osdc, ceph_vino(inode), &ci->i_layout, @@ -220,6 +216,9 @@ static int readpage_nounlock(struct file *filp, struct page *page) } SetPageUptodate(page); + if (err == 0) + ceph_readpage_to_fscache(inode, page); + out: return err < 0 ? err : 0; } @@ -262,6 +261,7 @@ static void finish_read(struct ceph_osd_request *req, struct ceph_msg *msg) page->index); flush_dcache_page(page); SetPageUptodate(page); + ceph_readpage_to_fscache(inode, page); unlock_page(page); page_cache_release(page); bytes -= PAGE_CACHE_SIZE; @@ -331,11 +331,12 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max) page = list_entry(page_list->prev, struct page, lru); BUG_ON(PageLocked(page)); list_del(&page->lru); - + dout("start_read %p adding %p idx %lu\n", inode, page, page->index); if (add_to_page_cache_lru(page, &inode->i_data, page->index, GFP_NOFS)) { + ceph_fscache_uncache_page(inode, page); page_cache_release(page); dout("start_read %p add_to_page_cache failed %p\n", inode, page); @@ -378,6 +379,12 @@ static int ceph_readpages(struct file *file, struct address_space *mapping, int rc = 0; int max = 0; + rc = ceph_readpages_from_fscache(mapping->host, mapping, page_list, + &nr_pages); + + if (rc == 0) + goto out; + if (fsc->mount_options->rsize >= PAGE_CACHE_SIZE) max = (fsc->mount_options->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_SHIFT; @@ -392,6 +399,8 @@ static int ceph_readpages(struct file *file, struct address_space *mapping, BUG_ON(rc == 0); } out: + ceph_fscache_readpages_cancel(inode, page_list); + dout("readpages %p file %p ret %d\n", inode, file, rc); return rc; } @@ -497,6 +506,8 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc) CONGESTION_ON_THRESH(fsc->mount_options->congestion_kb)) set_bdi_congested(&fsc->backing_dev_info, BLK_RW_ASYNC); + ceph_readpage_to_fscache(inode, page); + set_page_writeback(page); err = ceph_osdc_writepages(osdc, ceph_vino(inode), &ci->i_layout, snapc, @@ -552,7 +563,6 @@ static void ceph_release_pages(struct page **pages, int num) pagevec_release(&pvec); } - /* * async writeback completion handler. * diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c new file mode 100644 index 000000000000..6bfe65e0b038 --- /dev/null +++ b/fs/ceph/cache.c @@ -0,0 +1,398 @@ +/* + * Ceph cache definitions. + * + * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved. + * Written by Milosz Tanski (milosz@adfin.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#include "super.h" +#include "cache.h" + +struct ceph_aux_inode { + struct timespec mtime; + loff_t size; +}; + +struct fscache_netfs ceph_cache_netfs = { + .name = "ceph", + .version = 0, +}; + +static uint16_t ceph_fscache_session_get_key(const void *cookie_netfs_data, + void *buffer, uint16_t maxbuf) +{ + const struct ceph_fs_client* fsc = cookie_netfs_data; + uint16_t klen; + + klen = sizeof(fsc->client->fsid); + if (klen > maxbuf) + return 0; + + memcpy(buffer, &fsc->client->fsid, klen); + return klen; +} + +static const struct fscache_cookie_def ceph_fscache_fsid_object_def = { + .name = "CEPH.fsid", + .type = FSCACHE_COOKIE_TYPE_INDEX, + .get_key = ceph_fscache_session_get_key, +}; + +int ceph_fscache_register(void) +{ + return fscache_register_netfs(&ceph_cache_netfs); +} + +void ceph_fscache_unregister(void) +{ + fscache_unregister_netfs(&ceph_cache_netfs); +} + +int ceph_fscache_register_fs(struct ceph_fs_client* fsc) +{ + fsc->fscache = fscache_acquire_cookie(ceph_cache_netfs.primary_index, + &ceph_fscache_fsid_object_def, + fsc); + + if (fsc->fscache == NULL) { + pr_err("Unable to resgister fsid: %p fscache cookie", fsc); + return 0; + } + + fsc->revalidate_wq = alloc_workqueue("ceph-revalidate", 0, 1); + if (fsc->revalidate_wq == NULL) + return -ENOMEM; + + return 0; +} + +static uint16_t ceph_fscache_inode_get_key(const void *cookie_netfs_data, + void *buffer, uint16_t maxbuf) +{ + const struct ceph_inode_info* ci = cookie_netfs_data; + uint16_t klen; + + /* use ceph virtual inode (id + snaphot) */ + klen = sizeof(ci->i_vino); + if (klen > maxbuf) + return 0; + + memcpy(buffer, &ci->i_vino, klen); + return klen; +} + +static uint16_t ceph_fscache_inode_get_aux(const void *cookie_netfs_data, + void *buffer, uint16_t bufmax) +{ + struct ceph_aux_inode aux; + const struct ceph_inode_info* ci = cookie_netfs_data; + const struct inode* inode = &ci->vfs_inode; + + memset(&aux, 0, sizeof(aux)); + aux.mtime = inode->i_mtime; + aux.size = inode->i_size; + + memcpy(buffer, &aux, sizeof(aux)); + + return sizeof(aux); +} + +static void ceph_fscache_inode_get_attr(const void *cookie_netfs_data, + uint64_t *size) +{ + const struct ceph_inode_info* ci = cookie_netfs_data; + const struct inode* inode = &ci->vfs_inode; + + *size = inode->i_size; +} + +static enum fscache_checkaux ceph_fscache_inode_check_aux( + void *cookie_netfs_data, const void *data, uint16_t dlen) +{ + struct ceph_aux_inode aux; + struct ceph_inode_info* ci = cookie_netfs_data; + struct inode* inode = &ci->vfs_inode; + + if (dlen != sizeof(aux)) + return FSCACHE_CHECKAUX_OBSOLETE; + + memset(&aux, 0, sizeof(aux)); + aux.mtime = inode->i_mtime; + aux.size = inode->i_size; + + if (memcmp(data, &aux, sizeof(aux)) != 0) + return FSCACHE_CHECKAUX_OBSOLETE; + + dout("ceph inode 0x%p cached okay", ci); + return FSCACHE_CHECKAUX_OKAY; +} + +static void ceph_fscache_inode_now_uncached(void* cookie_netfs_data) +{ + struct ceph_inode_info* ci = cookie_netfs_data; + struct pagevec pvec; + pgoff_t first; + int loop, nr_pages; + + pagevec_init(&pvec, 0); + first = 0; + + dout("ceph inode 0x%p now uncached", ci); + + while (1) { + nr_pages = pagevec_lookup(&pvec, ci->vfs_inode.i_mapping, first, + PAGEVEC_SIZE - pagevec_count(&pvec)); + + if (!nr_pages) + break; + + for (loop = 0; loop < nr_pages; loop++) + ClearPageFsCache(pvec.pages[loop]); + + first = pvec.pages[nr_pages - 1]->index + 1; + + pvec.nr = nr_pages; + pagevec_release(&pvec); + cond_resched(); + } +} + +static const struct fscache_cookie_def ceph_fscache_inode_object_def = { + .name = "CEPH.inode", + .type = FSCACHE_COOKIE_TYPE_DATAFILE, + .get_key = ceph_fscache_inode_get_key, + .get_attr = ceph_fscache_inode_get_attr, + .get_aux = ceph_fscache_inode_get_aux, + .check_aux = ceph_fscache_inode_check_aux, + .now_uncached = ceph_fscache_inode_now_uncached, +}; + +void ceph_fscache_register_inode_cookie(struct ceph_fs_client* fsc, + struct ceph_inode_info* ci) +{ + struct inode* inode = &ci->vfs_inode; + + /* No caching for filesystem */ + if (fsc->fscache == NULL) + return; + + /* Only cache for regular files that are read only */ + if ((ci->vfs_inode.i_mode & S_IFREG) == 0) + return; + + /* Avoid multiple racing open requests */ + mutex_lock(&inode->i_mutex); + + if (ci->fscache) + goto done; + + ci->fscache = fscache_acquire_cookie(fsc->fscache, + &ceph_fscache_inode_object_def, + ci); +done: + mutex_unlock(&inode->i_mutex); + +} + +void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) +{ + struct fscache_cookie* cookie; + + if ((cookie = ci->fscache) == NULL) + return; + + ci->fscache = NULL; + + fscache_uncache_all_inode_pages(cookie, &ci->vfs_inode); + fscache_relinquish_cookie(cookie, 0); +} + +static void ceph_vfs_readpage_complete(struct page *page, void *data, int error) +{ + if (!error) + SetPageUptodate(page); +} + +static void ceph_vfs_readpage_complete_unlock(struct page *page, void *data, int error) +{ + if (!error) + SetPageUptodate(page); + + unlock_page(page); +} + +static inline int cache_valid(struct ceph_inode_info *ci) +{ + return ((ceph_caps_issued(ci) & CEPH_CAP_FILE_CACHE) && + (ci->i_fscache_gen == ci->i_rdcache_gen)); +} + + +/* Atempt to read from the fscache, + * + * This function is called from the readpage_nounlock context. DO NOT attempt to + * unlock the page here (or in the callback). + */ +int ceph_readpage_from_fscache(struct inode *inode, struct page *page) +{ + struct ceph_inode_info *ci = ceph_inode(inode); + int ret; + + if (!cache_valid(ci)) + return -ENOBUFS; + + ret = fscache_read_or_alloc_page(ci->fscache, page, + ceph_vfs_readpage_complete, NULL, + GFP_KERNEL); + + switch (ret) { + case 0: /* Page found */ + dout("page read submitted\n"); + return 0; + case -ENOBUFS: /* Pages were not found, and can't be */ + case -ENODATA: /* Pages were not found */ + dout("page/inode not in cache\n"); + return ret; + default: + dout("%s: unknown error ret = %i\n", __func__, ret); + return ret; + } +} + +int ceph_readpages_from_fscache(struct inode *inode, + struct address_space *mapping, + struct list_head *pages, + unsigned *nr_pages) +{ + struct ceph_inode_info *ci = ceph_inode(inode); + int ret; + + if (!cache_valid(ci)) + return -ENOBUFS; + + ret = fscache_read_or_alloc_pages(ci->fscache, mapping, pages, nr_pages, + ceph_vfs_readpage_complete_unlock, + NULL, mapping_gfp_mask(mapping)); + + switch (ret) { + case 0: /* All pages found */ + dout("all-page read submitted\n"); + return 0; + case -ENOBUFS: /* Some pages were not found, and can't be */ + case -ENODATA: /* some pages were not found */ + dout("page/inode not in cache\n"); + return ret; + default: + dout("%s: unknown error ret = %i\n", __func__, ret); + return ret; + } +} + +void ceph_readpage_to_fscache(struct inode *inode, struct page *page) +{ + struct ceph_inode_info *ci = ceph_inode(inode); + int ret; + + if (!PageFsCache(page)) + return; + + if (!cache_valid(ci)) + return; + + ret = fscache_write_page(ci->fscache, page, GFP_KERNEL); + if (ret) + fscache_uncache_page(ci->fscache, page); +} + +void ceph_invalidate_fscache_page(struct inode* inode, struct page *page) +{ + struct ceph_inode_info *ci = ceph_inode(inode); + + fscache_wait_on_page_write(ci->fscache, page); + fscache_uncache_page(ci->fscache, page); +} + +void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) +{ + if (fsc->revalidate_wq) + destroy_workqueue(fsc->revalidate_wq); + + fscache_relinquish_cookie(fsc->fscache, 0); + fsc->fscache = NULL; +} + +static void ceph_revalidate_work(struct work_struct *work) +{ + int issued; + u32 orig_gen; + struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, + i_revalidate_work); + struct inode *inode = &ci->vfs_inode; + + spin_lock(&ci->i_ceph_lock); + issued = __ceph_caps_issued(ci, NULL); + orig_gen = ci->i_rdcache_gen; + spin_unlock(&ci->i_ceph_lock); + + if (!(issued & CEPH_CAP_FILE_CACHE)) { + dout("revalidate_work lost cache before validation %p\n", + inode); + goto out; + } + + if (!fscache_check_consistency(ci->fscache)) + fscache_invalidate(ci->fscache); + + spin_lock(&ci->i_ceph_lock); + /* Update the new valid generation (backwards sanity check too) */ + if (orig_gen > ci->i_fscache_gen) { + ci->i_fscache_gen = orig_gen; + } + spin_unlock(&ci->i_ceph_lock); + +out: + iput(&ci->vfs_inode); +} + +void ceph_queue_revalidate(struct inode *inode) +{ + struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); + struct ceph_inode_info *ci = ceph_inode(inode); + + if (fsc->revalidate_wq == NULL || ci->fscache == NULL) + return; + + ihold(inode); + + if (queue_work(ceph_sb_to_client(inode->i_sb)->revalidate_wq, + &ci->i_revalidate_work)) { + dout("ceph_queue_revalidate %p\n", inode); + } else { + dout("ceph_queue_revalidate %p failed\n)", inode); + iput(inode); + } +} + +void ceph_fscache_inode_init(struct ceph_inode_info *ci) +{ + ci->fscache = NULL; + /* The first load is verifed cookie open time */ + ci->i_fscache_gen = 1; + INIT_WORK(&ci->i_revalidate_work, ceph_revalidate_work); +} diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h new file mode 100644 index 000000000000..ba949408a336 --- /dev/null +++ b/fs/ceph/cache.h @@ -0,0 +1,159 @@ +/* + * Ceph cache definitions. + * + * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved. + * Written by Milosz Tanski (milosz@adfin.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#ifndef _CEPH_CACHE_H +#define _CEPH_CACHE_H + +#ifdef CONFIG_CEPH_FSCACHE + +extern struct fscache_netfs ceph_cache_netfs; + +int ceph_fscache_register(void); +void ceph_fscache_unregister(void); + +int ceph_fscache_register_fs(struct ceph_fs_client* fsc); +void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc); + +void ceph_fscache_inode_init(struct ceph_inode_info *ci); +void ceph_fscache_register_inode_cookie(struct ceph_fs_client* fsc, + struct ceph_inode_info* ci); +void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci); + +int ceph_readpage_from_fscache(struct inode *inode, struct page *page); +int ceph_readpages_from_fscache(struct inode *inode, + struct address_space *mapping, + struct list_head *pages, + unsigned *nr_pages); +void ceph_readpage_to_fscache(struct inode *inode, struct page *page); +void ceph_invalidate_fscache_page(struct inode* inode, struct page *page); +void ceph_queue_revalidate(struct inode *inode); + +static inline void ceph_fscache_invalidate(struct inode *inode) +{ + fscache_invalidate(ceph_inode(inode)->fscache); +} + +static inline void ceph_fscache_uncache_page(struct inode *inode, + struct page *page) +{ + struct ceph_inode_info *ci = ceph_inode(inode); + return fscache_uncache_page(ci->fscache, page); +} + +static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) +{ + struct inode* inode = page->mapping->host; + struct ceph_inode_info *ci = ceph_inode(inode); + return fscache_maybe_release_page(ci->fscache, page, gfp); +} + +static inline void ceph_fscache_readpages_cancel(struct inode *inode, + struct list_head *pages) +{ + struct ceph_inode_info *ci = ceph_inode(inode); + return fscache_readpages_cancel(ci->fscache, pages); +} + +#else + +static inline int ceph_fscache_register(void) +{ + return 0; +} + +static inline void ceph_fscache_unregister(void) +{ +} + +static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc) +{ + return 0; +} + +static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) +{ +} + +static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci) +{ +} + +static inline void ceph_fscache_register_inode_cookie(struct ceph_fs_client* parent_fsc, + struct ceph_inode_info* ci) +{ +} + +static inline void ceph_fscache_uncache_page(struct inode *inode, + struct page *pages) +{ +} + +static inline int ceph_readpage_from_fscache(struct inode* inode, + struct page *page) +{ + return -ENOBUFS; +} + +static inline int ceph_readpages_from_fscache(struct inode *inode, + struct address_space *mapping, + struct list_head *pages, + unsigned *nr_pages) +{ + return -ENOBUFS; +} + +static inline void ceph_readpage_to_fscache(struct inode *inode, + struct page *page) +{ +} + +static inline void ceph_fscache_invalidate(struct inode *inode) +{ +} + +static inline void ceph_invalidate_fscache_page(struct inode *inode, + struct page *page) +{ +} + +static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) +{ +} + +static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) +{ + return 1; +} + +static inline void ceph_fscache_readpages_cancel(struct inode *inode, + struct list_head *pages) +{ +} + +static inline void ceph_queue_revalidate(struct inode *inode) +{ +} + +#endif + +#endif diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 25442b40c25a..13976c33332e 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -10,6 +10,7 @@ #include "super.h" #include "mds_client.h" +#include "cache.h" #include <linux/ceph/decode.h> #include <linux/ceph/messenger.h> @@ -479,8 +480,9 @@ static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap, * i_rdcache_gen. */ if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) && - (had & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0) + (had & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0) { ci->i_rdcache_gen++; + } /* * if we are newly issued FILE_SHARED, mark dir not complete; we @@ -2072,19 +2074,17 @@ static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want, /* finish pending truncate */ while (ci->i_truncate_pending) { spin_unlock(&ci->i_ceph_lock); - if (!(need & CEPH_CAP_FILE_WR)) - mutex_lock(&inode->i_mutex); __ceph_do_pending_vmtruncate(inode); - if (!(need & CEPH_CAP_FILE_WR)) - mutex_unlock(&inode->i_mutex); spin_lock(&ci->i_ceph_lock); } - if (need & CEPH_CAP_FILE_WR) { + have = __ceph_caps_issued(ci, &implemented); + + if (have & need & CEPH_CAP_FILE_WR) { if (endoff >= 0 && endoff > (loff_t)ci->i_max_size) { dout("get_cap_refs %p endoff %llu > maxsize %llu\n", inode, endoff, ci->i_max_size); - if (endoff > ci->i_wanted_max_size) { + if (endoff > ci->i_requested_max_size) { *check_max = 1; ret = 1; } @@ -2099,7 +2099,6 @@ static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want, goto out; } } - have = __ceph_caps_issued(ci, &implemented); if ((have & need) == need) { /* @@ -2141,14 +2140,17 @@ static void check_max_size(struct inode *inode, loff_t endoff) /* do we need to explicitly request a larger max_size? */ spin_lock(&ci->i_ceph_lock); - if ((endoff >= ci->i_max_size || - endoff > (inode->i_size << 1)) && - endoff > ci->i_wanted_max_size) { + if (endoff >= ci->i_max_size && endoff > ci->i_wanted_max_size) { dout("write %p at large endoff %llu, req max_size\n", inode, endoff); ci->i_wanted_max_size = endoff; - check = 1; } + /* duplicate ceph_check_caps()'s logic */ + if (ci->i_auth_cap && + (ci->i_auth_cap->issued & CEPH_CAP_FILE_WR) && + ci->i_wanted_max_size > ci->i_max_size && + ci->i_wanted_max_size > ci->i_requested_max_size) + check = 1; spin_unlock(&ci->i_ceph_lock); if (check) ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); @@ -2334,6 +2336,38 @@ void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, } /* + * Invalidate unlinked inode's aliases, so we can drop the inode ASAP. + */ +static void invalidate_aliases(struct inode *inode) +{ + struct dentry *dn, *prev = NULL; + + dout("invalidate_aliases inode %p\n", inode); + d_prune_aliases(inode); + /* + * For non-directory inode, d_find_alias() only returns + * connected dentry. After calling d_invalidate(), the + * dentry become disconnected. + * + * For directory inode, d_find_alias() can return + * disconnected dentry. But directory inode should have + * one alias at most. + */ + while ((dn = d_find_alias(inode))) { + if (dn == prev) { + dput(dn); + break; + } + d_invalidate(dn); + if (prev) + dput(prev); + prev = dn; + } + if (prev) + dput(prev); +} + +/* * Handle a cap GRANT message from the MDS. (Note that a GRANT may * actually be a revocation if it specifies a smaller cap set.) * @@ -2361,8 +2395,9 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, int check_caps = 0; int wake = 0; int writeback = 0; - int revoked_rdcache = 0; int queue_invalidate = 0; + int deleted_inode = 0; + int queue_revalidate = 0; dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n", inode, cap, mds, seq, ceph_cap_string(newcaps)); @@ -2377,9 +2412,7 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, if (((cap->issued & ~newcaps) & CEPH_CAP_FILE_CACHE) && (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 && !ci->i_wrbuffer_ref) { - if (try_nonblocking_invalidate(inode) == 0) { - revoked_rdcache = 1; - } else { + if (try_nonblocking_invalidate(inode)) { /* there were locked pages.. invalidate later in a separate thread. */ if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { @@ -2387,6 +2420,8 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, ci->i_rdcache_revoking = ci->i_rdcache_gen; } } + + ceph_fscache_invalidate(inode); } /* side effects now are allowed */ @@ -2407,8 +2442,12 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, from_kgid(&init_user_ns, inode->i_gid)); } - if ((issued & CEPH_CAP_LINK_EXCL) == 0) + if ((issued & CEPH_CAP_LINK_EXCL) == 0) { set_nlink(inode, le32_to_cpu(grant->nlink)); + if (inode->i_nlink == 0 && + (newcaps & (CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL))) + deleted_inode = 1; + } if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && grant->xattr_len) { int len = le32_to_cpu(grant->xattr_len); @@ -2424,6 +2463,11 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, } } + /* Do we need to revalidate our fscache cookie. Don't bother on the + * first cache cap as we already validate at cookie creation time. */ + if ((issued & CEPH_CAP_FILE_CACHE) && ci->i_rdcache_gen > 1) + queue_revalidate = 1; + /* size/ctime/mtime/atime? */ ceph_fill_file_size(inode, issued, le32_to_cpu(grant->truncate_seq), @@ -2508,6 +2552,7 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, BUG_ON(cap->issued & ~cap->implemented); spin_unlock(&ci->i_ceph_lock); + if (writeback) /* * queue inode for writeback: we can't actually call @@ -2517,6 +2562,10 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, ceph_queue_writeback(inode); if (queue_invalidate) ceph_queue_invalidate(inode); + if (deleted_inode) + invalidate_aliases(inode); + if (queue_revalidate) + ceph_queue_revalidate(inode); if (wake) wake_up_all(&ci->i_cap_wq); @@ -2673,8 +2722,10 @@ static void handle_cap_trunc(struct inode *inode, truncate_seq, truncate_size, size); spin_unlock(&ci->i_ceph_lock); - if (queue_trunc) + if (queue_trunc) { ceph_queue_vmtruncate(inode); + ceph_fscache_invalidate(inode); + } } /* diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index a40ceda47a32..868b61d56cac 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -793,6 +793,8 @@ static int ceph_link(struct dentry *old_dentry, struct inode *dir, req->r_locked_dir = dir; req->r_dentry_drop = CEPH_CAP_FILE_SHARED; req->r_dentry_unless = CEPH_CAP_FILE_EXCL; + /* release LINK_SHARED on source inode (mds will lock it) */ + req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; err = ceph_mdsc_do_request(mdsc, dir, req); if (err) { d_drop(dentry); diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 2ddf061c1c4a..3de89829e2a1 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -8,9 +8,11 @@ #include <linux/namei.h> #include <linux/writeback.h> #include <linux/aio.h> +#include <linux/falloc.h> #include "super.h" #include "mds_client.h" +#include "cache.h" /* * Ceph file operations @@ -68,9 +70,23 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode) { struct ceph_file_info *cf; int ret = 0; + struct ceph_inode_info *ci = ceph_inode(inode); + struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); + struct ceph_mds_client *mdsc = fsc->mdsc; switch (inode->i_mode & S_IFMT) { case S_IFREG: + /* First file open request creates the cookie, we want to keep + * this cookie around for the filetime of the inode as not to + * have to worry about fscache register / revoke / operation + * races. + * + * Also, if we know the operation is going to invalidate data + * (non readonly) just nuke the cache right away. + */ + ceph_fscache_register_inode_cookie(mdsc->fsc, ci); + if ((fmode & CEPH_FILE_MODE_WR)) + ceph_fscache_invalidate(inode); case S_IFDIR: dout("init_file %p %p 0%o (regular)\n", inode, file, inode->i_mode); @@ -181,6 +197,7 @@ int ceph_open(struct inode *inode, struct file *file) spin_unlock(&ci->i_ceph_lock); return ceph_init_file(inode, file, fmode); } + spin_unlock(&ci->i_ceph_lock); dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted)); @@ -191,6 +208,7 @@ int ceph_open(struct inode *inode, struct file *file) } req->r_inode = inode; ihold(inode); + req->r_num_caps = 1; if (flags & (O_CREAT|O_TRUNC)) parent_inode = ceph_get_dentry_parent_inode(file->f_dentry); @@ -313,9 +331,9 @@ static int striped_read(struct inode *inode, { struct ceph_fs_client *fsc = ceph_inode_to_client(inode); struct ceph_inode_info *ci = ceph_inode(inode); - u64 pos, this_len; + u64 pos, this_len, left; int io_align, page_align; - int left, pages_left; + int pages_left; int read; struct page **page_pos; int ret; @@ -346,47 +364,40 @@ more: ret = 0; hit_stripe = this_len < left; was_short = ret >= 0 && ret < this_len; - dout("striped_read %llu~%u (read %u) got %d%s%s\n", pos, left, read, + dout("striped_read %llu~%llu (read %u) got %d%s%s\n", pos, left, read, ret, hit_stripe ? " HITSTRIPE" : "", was_short ? " SHORT" : ""); - if (ret > 0) { - int didpages = (page_align + ret) >> PAGE_CACHE_SHIFT; - - if (read < pos - off) { - dout(" zero gap %llu to %llu\n", off + read, pos); - ceph_zero_page_vector_range(page_align + read, - pos - off - read, pages); + if (ret >= 0) { + int didpages; + if (was_short && (pos + ret < inode->i_size)) { + u64 tmp = min(this_len - ret, + inode->i_size - pos - ret); + dout(" zero gap %llu to %llu\n", + pos + ret, pos + ret + tmp); + ceph_zero_page_vector_range(page_align + read + ret, + tmp, pages); + ret += tmp; } + + didpages = (page_align + ret) >> PAGE_CACHE_SHIFT; pos += ret; read = pos - off; left -= ret; page_pos += didpages; pages_left -= didpages; - /* hit stripe? */ - if (left && hit_stripe) + /* hit stripe and need continue*/ + if (left && hit_stripe && pos < inode->i_size) goto more; } - if (was_short) { + if (read > 0) { + ret = read; /* did we bounce off eof? */ if (pos + left > inode->i_size) *checkeof = 1; - - /* zero trailing bytes (inside i_size) */ - if (left > 0 && pos < inode->i_size) { - if (pos + left > inode->i_size) - left = inode->i_size - pos; - - dout("zero tail %d\n", left); - ceph_zero_page_vector_range(page_align + read, left, - pages); - read += left; - } } - if (ret >= 0) - ret = read; dout("striped_read returns %d\n", ret); return ret; } @@ -618,6 +629,8 @@ out: if (check_caps) ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY, NULL); + } else if (ret != -EOLDSNAPC && written > 0) { + ret = written; } return ret; } @@ -659,7 +672,6 @@ again: if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 || (iocb->ki_filp->f_flags & O_DIRECT) || - (inode->i_sb->s_flags & MS_SYNCHRONOUS) || (fi->flags & CEPH_F_SYNC)) /* hmm, this isn't really async... */ ret = ceph_sync_read(filp, base, len, ppos, &checkeof); @@ -711,13 +723,11 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov, &ceph_sb_to_client(inode->i_sb)->client->osdc; ssize_t count, written = 0; int err, want, got; - bool hold_mutex; if (ceph_snap(inode) != CEPH_NOSNAP) return -EROFS; mutex_lock(&inode->i_mutex); - hold_mutex = true; err = generic_segment_checks(iov, &nr_segs, &count, VERIFY_READ); if (err) @@ -763,18 +773,31 @@ retry_snap: if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || (iocb->ki_filp->f_flags & O_DIRECT) || - (inode->i_sb->s_flags & MS_SYNCHRONOUS) || (fi->flags & CEPH_F_SYNC)) { mutex_unlock(&inode->i_mutex); written = ceph_sync_write(file, iov->iov_base, count, pos, &iocb->ki_pos); + if (written == -EOLDSNAPC) { + dout("aio_write %p %llx.%llx %llu~%u" + "got EOLDSNAPC, retrying\n", + inode, ceph_vinop(inode), + pos, (unsigned)iov->iov_len); + mutex_lock(&inode->i_mutex); + goto retry_snap; + } } else { + /* + * No need to acquire the i_truncate_mutex. Because + * the MDS revokes Fwb caps before sending truncate + * message to us. We can't get Fwb cap while there + * are pending vmtruncate. So write and vmtruncate + * can not run at the same time + */ written = generic_file_buffered_write(iocb, iov, nr_segs, pos, &iocb->ki_pos, count, 0); mutex_unlock(&inode->i_mutex); } - hold_mutex = false; if (written >= 0) { int dirty; @@ -798,18 +821,12 @@ retry_snap: written = err; } - if (written == -EOLDSNAPC) { - dout("aio_write %p %llx.%llx %llu~%u got EOLDSNAPC, retrying\n", - inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len); - mutex_lock(&inode->i_mutex); - hold_mutex = true; - goto retry_snap; - } + goto out_unlocked; + out: - if (hold_mutex) - mutex_unlock(&inode->i_mutex); + mutex_unlock(&inode->i_mutex); +out_unlocked: current->backing_dev_info = NULL; - return written ? written : err; } @@ -822,7 +839,6 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) int ret; mutex_lock(&inode->i_mutex); - __ceph_do_pending_vmtruncate(inode); if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE); @@ -871,6 +887,204 @@ out: return offset; } +static inline void ceph_zero_partial_page( + struct inode *inode, loff_t offset, unsigned size) +{ + struct page *page; + pgoff_t index = offset >> PAGE_CACHE_SHIFT; + + page = find_lock_page(inode->i_mapping, index); + if (page) { + wait_on_page_writeback(page); + zero_user(page, offset & (PAGE_CACHE_SIZE - 1), size); + unlock_page(page); + page_cache_release(page); + } +} + +static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset, + loff_t length) +{ + loff_t nearly = round_up(offset, PAGE_CACHE_SIZE); + if (offset < nearly) { + loff_t size = nearly - offset; + if (length < size) + size = length; + ceph_zero_partial_page(inode, offset, size); + offset += size; + length -= size; + } + if (length >= PAGE_CACHE_SIZE) { + loff_t size = round_down(length, PAGE_CACHE_SIZE); + truncate_pagecache_range(inode, offset, offset + size - 1); + offset += size; + length -= size; + } + if (length) + ceph_zero_partial_page(inode, offset, length); +} + +static int ceph_zero_partial_object(struct inode *inode, + loff_t offset, loff_t *length) +{ + struct ceph_inode_info *ci = ceph_inode(inode); + struct ceph_fs_client *fsc = ceph_inode_to_client(inode); + struct ceph_osd_request *req; + int ret = 0; + loff_t zero = 0; + int op; + + if (!length) { + op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE; + length = &zero; + } else { + op = CEPH_OSD_OP_ZERO; + } + + req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, + ceph_vino(inode), + offset, length, + 1, op, + CEPH_OSD_FLAG_WRITE | + CEPH_OSD_FLAG_ONDISK, + NULL, 0, 0, false); + if (IS_ERR(req)) { + ret = PTR_ERR(req); + goto out; + } + + ceph_osdc_build_request(req, offset, NULL, ceph_vino(inode).snap, + &inode->i_mtime); + + ret = ceph_osdc_start_request(&fsc->client->osdc, req, false); + if (!ret) { + ret = ceph_osdc_wait_request(&fsc->client->osdc, req); + if (ret == -ENOENT) + ret = 0; + } + ceph_osdc_put_request(req); + +out: + return ret; +} + +static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length) +{ + int ret = 0; + struct ceph_inode_info *ci = ceph_inode(inode); + s32 stripe_unit = ceph_file_layout_su(ci->i_layout); + s32 stripe_count = ceph_file_layout_stripe_count(ci->i_layout); + s32 object_size = ceph_file_layout_object_size(ci->i_layout); + u64 object_set_size = object_size * stripe_count; + u64 nearly, t; + + /* round offset up to next period boundary */ + nearly = offset + object_set_size - 1; + t = nearly; + nearly -= do_div(t, object_set_size); + + while (length && offset < nearly) { + loff_t size = length; + ret = ceph_zero_partial_object(inode, offset, &size); + if (ret < 0) + return ret; + offset += size; + length -= size; + } + while (length >= object_set_size) { + int i; + loff_t pos = offset; + for (i = 0; i < stripe_count; ++i) { + ret = ceph_zero_partial_object(inode, pos, NULL); + if (ret < 0) + return ret; + pos += stripe_unit; + } + offset += object_set_size; + length -= object_set_size; + } + while (length) { + loff_t size = length; + ret = ceph_zero_partial_object(inode, offset, &size); + if (ret < 0) + return ret; + offset += size; + length -= size; + } + return ret; +} + +static long ceph_fallocate(struct file *file, int mode, + loff_t offset, loff_t length) +{ + struct ceph_file_info *fi = file->private_data; + struct inode *inode = file->f_dentry->d_inode; + struct ceph_inode_info *ci = ceph_inode(inode); + struct ceph_osd_client *osdc = + &ceph_inode_to_client(inode)->client->osdc; + int want, got = 0; + int dirty; + int ret = 0; + loff_t endoff = 0; + loff_t size; + + if (!S_ISREG(inode->i_mode)) + return -EOPNOTSUPP; + + if (IS_SWAPFILE(inode)) + return -ETXTBSY; + + mutex_lock(&inode->i_mutex); + + if (ceph_snap(inode) != CEPH_NOSNAP) { + ret = -EROFS; + goto unlock; + } + + if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) && + !(mode & FALLOC_FL_PUNCH_HOLE)) { + ret = -ENOSPC; + goto unlock; + } + + size = i_size_read(inode); + if (!(mode & FALLOC_FL_KEEP_SIZE)) + endoff = offset + length; + + if (fi->fmode & CEPH_FILE_MODE_LAZY) + want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; + else + want = CEPH_CAP_FILE_BUFFER; + + ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, endoff); + if (ret < 0) + goto unlock; + + if (mode & FALLOC_FL_PUNCH_HOLE) { + if (offset < size) + ceph_zero_pagecache_range(inode, offset, length); + ret = ceph_zero_objects(inode, offset, length); + } else if (endoff > size) { + truncate_pagecache_range(inode, size, -1); + if (ceph_inode_set_size(inode, endoff)) + ceph_check_caps(ceph_inode(inode), + CHECK_CAPS_AUTHONLY, NULL); + } + + if (!ret) { + spin_lock(&ci->i_ceph_lock); + dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR); + spin_unlock(&ci->i_ceph_lock); + if (dirty) + __mark_inode_dirty(inode, dirty); + } + + ceph_put_cap_refs(ci, got); +unlock: + mutex_unlock(&inode->i_mutex); + return ret; +} + const struct file_operations ceph_file_fops = { .open = ceph_open, .release = ceph_release, @@ -887,5 +1101,6 @@ const struct file_operations ceph_file_fops = { .splice_write = generic_file_splice_write, .unlocked_ioctl = ceph_ioctl, .compat_ioctl = ceph_ioctl, + .fallocate = ceph_fallocate, }; diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index f3a2abf28a77..8549a48115f7 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -12,6 +12,7 @@ #include "super.h" #include "mds_client.h" +#include "cache.h" #include <linux/ceph/decode.h> /* @@ -344,6 +345,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb) for (i = 0; i < CEPH_FILE_MODE_NUM; i++) ci->i_nr_by_mode[i] = 0; + mutex_init(&ci->i_truncate_mutex); ci->i_truncate_seq = 0; ci->i_truncate_size = 0; ci->i_truncate_pending = 0; @@ -377,6 +379,8 @@ struct inode *ceph_alloc_inode(struct super_block *sb) INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); + ceph_fscache_inode_init(ci); + return &ci->vfs_inode; } @@ -396,6 +400,8 @@ void ceph_destroy_inode(struct inode *inode) dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); + ceph_fscache_unregister_inode_cookie(ci); + ceph_queue_caps_release(inode); /* @@ -430,7 +436,6 @@ void ceph_destroy_inode(struct inode *inode) call_rcu(&inode->i_rcu, ceph_i_callback); } - /* * Helpers to fill in size, ctime, mtime, and atime. We have to be * careful because either the client or MDS may have more up to date @@ -455,16 +460,20 @@ int ceph_fill_file_size(struct inode *inode, int issued, dout("truncate_seq %u -> %u\n", ci->i_truncate_seq, truncate_seq); ci->i_truncate_seq = truncate_seq; + + /* the MDS should have revoked these caps */ + WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL | + CEPH_CAP_FILE_RD | + CEPH_CAP_FILE_WR | + CEPH_CAP_FILE_LAZYIO)); /* * If we hold relevant caps, or in the case where we're * not the only client referencing this file and we * don't hold those caps, then we need to check whether * the file is either opened or mmaped */ - if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| - CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| - CEPH_CAP_FILE_EXCL| - CEPH_CAP_FILE_LAZYIO)) || + if ((issued & (CEPH_CAP_FILE_CACHE| + CEPH_CAP_FILE_BUFFER)) || mapping_mapped(inode->i_mapping) || __ceph_caps_file_wanted(ci)) { ci->i_truncate_pending++; @@ -478,6 +487,10 @@ int ceph_fill_file_size(struct inode *inode, int issued, truncate_size); ci->i_truncate_size = truncate_size; } + + if (queue_trunc) + ceph_fscache_invalidate(inode); + return queue_trunc; } @@ -1066,7 +1079,7 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, * complete. */ ceph_set_dentry_offset(req->r_old_dentry); - dout("dn %p gets new offset %lld\n", req->r_old_dentry, + dout("dn %p gets new offset %lld\n", req->r_old_dentry, ceph_dentry(req->r_old_dentry)->offset); dn = req->r_old_dentry; /* use old_dentry */ @@ -1419,18 +1432,20 @@ static void ceph_invalidate_work(struct work_struct *work) u32 orig_gen; int check = 0; + mutex_lock(&ci->i_truncate_mutex); spin_lock(&ci->i_ceph_lock); dout("invalidate_pages %p gen %d revoking %d\n", inode, ci->i_rdcache_gen, ci->i_rdcache_revoking); if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { /* nevermind! */ spin_unlock(&ci->i_ceph_lock); + mutex_unlock(&ci->i_truncate_mutex); goto out; } orig_gen = ci->i_rdcache_gen; spin_unlock(&ci->i_ceph_lock); - truncate_inode_pages(&inode->i_data, 0); + truncate_inode_pages(inode->i_mapping, 0); spin_lock(&ci->i_ceph_lock); if (orig_gen == ci->i_rdcache_gen && @@ -1445,6 +1460,7 @@ static void ceph_invalidate_work(struct work_struct *work) ci->i_rdcache_revoking); } spin_unlock(&ci->i_ceph_lock); + mutex_unlock(&ci->i_truncate_mutex); if (check) ceph_check_caps(ci, 0, NULL); @@ -1465,9 +1481,7 @@ static void ceph_vmtruncate_work(struct work_struct *work) struct inode *inode = &ci->vfs_inode; dout("vmtruncate_work %p\n", inode); - mutex_lock(&inode->i_mutex); __ceph_do_pending_vmtruncate(inode); - mutex_unlock(&inode->i_mutex); iput(inode); } @@ -1480,6 +1494,7 @@ void ceph_queue_vmtruncate(struct inode *inode) struct ceph_inode_info *ci = ceph_inode(inode); ihold(inode); + if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, &ci->i_vmtruncate_work)) { dout("ceph_queue_vmtruncate %p\n", inode); @@ -1500,11 +1515,13 @@ void __ceph_do_pending_vmtruncate(struct inode *inode) u64 to; int wrbuffer_refs, finish = 0; + mutex_lock(&ci->i_truncate_mutex); retry: spin_lock(&ci->i_ceph_lock); if (ci->i_truncate_pending == 0) { dout("__do_pending_vmtruncate %p none pending\n", inode); spin_unlock(&ci->i_ceph_lock); + mutex_unlock(&ci->i_truncate_mutex); return; } @@ -1521,6 +1538,9 @@ retry: goto retry; } + /* there should be no reader or writer */ + WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); + to = ci->i_truncate_size; wrbuffer_refs = ci->i_wrbuffer_ref; dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, @@ -1538,13 +1558,14 @@ retry: if (!finish) goto retry; + mutex_unlock(&ci->i_truncate_mutex); + if (wrbuffer_refs == 0) ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); wake_up_all(&ci->i_cap_wq); } - /* * symlinks */ @@ -1586,8 +1607,6 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr) if (ceph_snap(inode) != CEPH_NOSNAP) return -EROFS; - __ceph_do_pending_vmtruncate(inode); - err = inode_change_ok(inode, attr); if (err != 0) return err; @@ -1768,7 +1787,8 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr) ceph_cap_string(dirtied), mask); ceph_mdsc_put_request(req); - __ceph_do_pending_vmtruncate(inode); + if (mask & CEPH_SETATTR_SIZE) + __ceph_do_pending_vmtruncate(inode); return err; out: spin_unlock(&ci->i_ceph_lock); diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c index e0b4ef31d3c8..669622fd1ae3 100644 --- a/fs/ceph/ioctl.c +++ b/fs/ceph/ioctl.c @@ -196,8 +196,10 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len, &dl.object_no, &dl.object_offset, &olen); - if (r < 0) + if (r < 0) { + up_read(&osdc->map_sem); return -EIO; + } dl.file_offset -= dl.object_offset; dl.object_size = ceph_file_layout_object_size(ci->i_layout); dl.block_size = ceph_file_layout_su(ci->i_layout); @@ -209,8 +211,12 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", ceph_ino(inode), dl.object_no); - ceph_calc_ceph_pg(&pgid, dl.object_name, osdc->osdmap, - ceph_file_layout_pg_pool(ci->i_layout)); + r = ceph_calc_ceph_pg(&pgid, dl.object_name, osdc->osdmap, + ceph_file_layout_pg_pool(ci->i_layout)); + if (r < 0) { + up_read(&osdc->map_sem); + return r; + } dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid); if (dl.osd >= 0) { diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 187bf214444d..b7bda5d9611d 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -414,6 +414,9 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, { struct ceph_mds_session *s; + if (mds >= mdsc->mdsmap->m_max_mds) + return ERR_PTR(-EINVAL); + s = kzalloc(sizeof(*s), GFP_NOFS); if (!s) return ERR_PTR(-ENOMEM); @@ -1028,6 +1031,37 @@ static void remove_session_caps(struct ceph_mds_session *session) { dout("remove_session_caps on %p\n", session); iterate_session_caps(session, remove_session_caps_cb, NULL); + + spin_lock(&session->s_cap_lock); + if (session->s_nr_caps > 0) { + struct super_block *sb = session->s_mdsc->fsc->sb; + struct inode *inode; + struct ceph_cap *cap, *prev = NULL; + struct ceph_vino vino; + /* + * iterate_session_caps() skips inodes that are being + * deleted, we need to wait until deletions are complete. + * __wait_on_freeing_inode() is designed for the job, + * but it is not exported, so use lookup inode function + * to access it. + */ + while (!list_empty(&session->s_caps)) { + cap = list_entry(session->s_caps.next, + struct ceph_cap, session_caps); + if (cap == prev) + break; + prev = cap; + vino = cap->ci->i_vino; + spin_unlock(&session->s_cap_lock); + + inode = ceph_find_inode(sb, vino); + iput(inode); + + spin_lock(&session->s_cap_lock); + } + } + spin_unlock(&session->s_cap_lock); + BUG_ON(session->s_nr_caps > 0); BUG_ON(!list_empty(&session->s_cap_flushing)); cleanup_cap_releases(session); diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 6627b26a800c..6a0951e43044 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -17,6 +17,7 @@ #include "super.h" #include "mds_client.h" +#include "cache.h" #include <linux/ceph/ceph_features.h> #include <linux/ceph/decode.h> @@ -142,6 +143,8 @@ enum { Opt_nodcache, Opt_ino32, Opt_noino32, + Opt_fscache, + Opt_nofscache }; static match_table_t fsopt_tokens = { @@ -167,6 +170,8 @@ static match_table_t fsopt_tokens = { {Opt_nodcache, "nodcache"}, {Opt_ino32, "ino32"}, {Opt_noino32, "noino32"}, + {Opt_fscache, "fsc"}, + {Opt_nofscache, "nofsc"}, {-1, NULL} }; @@ -260,6 +265,12 @@ static int parse_fsopt_token(char *c, void *private) case Opt_noino32: fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; break; + case Opt_fscache: + fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; + break; + case Opt_nofscache: + fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; + break; default: BUG_ON(token); } @@ -422,6 +433,10 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root) seq_puts(m, ",dcache"); else seq_puts(m, ",nodcache"); + if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) + seq_puts(m, ",fsc"); + else + seq_puts(m, ",nofsc"); if (fsopt->wsize) seq_printf(m, ",wsize=%d", fsopt->wsize); @@ -530,11 +545,18 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, if (!fsc->wb_pagevec_pool) goto fail_trunc_wq; + /* setup fscache */ + if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) && + (ceph_fscache_register_fs(fsc) != 0)) + goto fail_fscache; + /* caps */ fsc->min_caps = fsopt->max_readdir; return fsc; +fail_fscache: + ceph_fscache_unregister_fs(fsc); fail_trunc_wq: destroy_workqueue(fsc->trunc_wq); fail_pg_inv_wq: @@ -554,6 +576,8 @@ static void destroy_fs_client(struct ceph_fs_client *fsc) { dout("destroy_fs_client %p\n", fsc); + ceph_fscache_unregister_fs(fsc); + destroy_workqueue(fsc->wb_wq); destroy_workqueue(fsc->pg_inv_wq); destroy_workqueue(fsc->trunc_wq); @@ -588,6 +612,8 @@ static void ceph_inode_init_once(void *foo) static int __init init_caches(void) { + int error = -ENOMEM; + ceph_inode_cachep = kmem_cache_create("ceph_inode_info", sizeof(struct ceph_inode_info), __alignof__(struct ceph_inode_info), @@ -611,15 +637,17 @@ static int __init init_caches(void) if (ceph_file_cachep == NULL) goto bad_file; - return 0; + if ((error = ceph_fscache_register())) + goto bad_file; + return 0; bad_file: kmem_cache_destroy(ceph_dentry_cachep); bad_dentry: kmem_cache_destroy(ceph_cap_cachep); bad_cap: kmem_cache_destroy(ceph_inode_cachep); - return -ENOMEM; + return error; } static void destroy_caches(void) @@ -629,10 +657,13 @@ static void destroy_caches(void) * destroy cache. */ rcu_barrier(); + kmem_cache_destroy(ceph_inode_cachep); kmem_cache_destroy(ceph_cap_cachep); kmem_cache_destroy(ceph_dentry_cachep); kmem_cache_destroy(ceph_file_cachep); + + ceph_fscache_unregister(); } diff --git a/fs/ceph/super.h b/fs/ceph/super.h index cbded572345e..6014b0a3c405 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -16,6 +16,10 @@ #include <linux/ceph/libceph.h> +#ifdef CONFIG_CEPH_FSCACHE +#include <linux/fscache.h> +#endif + /* f_type in struct statfs */ #define CEPH_SUPER_MAGIC 0x00c36400 @@ -29,6 +33,7 @@ #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */ #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */ +#define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */ #define CEPH_MOUNT_OPT_DEFAULT (CEPH_MOUNT_OPT_RBYTES) @@ -90,6 +95,11 @@ struct ceph_fs_client { struct dentry *debugfs_bdi; struct dentry *debugfs_mdsc, *debugfs_mdsmap; #endif + +#ifdef CONFIG_CEPH_FSCACHE + struct fscache_cookie *fscache; + struct workqueue_struct *revalidate_wq; +#endif }; @@ -288,6 +298,7 @@ struct ceph_inode_info { int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */ + struct mutex i_truncate_mutex; u32 i_truncate_seq; /* last truncate to smaller size */ u64 i_truncate_size; /* and the size we last truncated down to */ int i_truncate_pending; /* still need to call vmtruncate */ @@ -319,6 +330,12 @@ struct ceph_inode_info { struct work_struct i_vmtruncate_work; +#ifdef CONFIG_CEPH_FSCACHE + struct fscache_cookie *fscache; + u32 i_fscache_gen; /* sequence, for delayed fscache validate */ + struct work_struct i_revalidate_work; +#endif + struct inode vfs_inode; /* at end */ }; diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 7e36ae34e947..9d0dd952ad79 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -2553,7 +2553,7 @@ cifs_writev(struct kiocb *iocb, const struct iovec *iov, mutex_unlock(&inode->i_mutex); } - if (rc > 0 || rc == -EIOCBQUEUED) { + if (rc > 0) { ssize_t err; err = generic_write_sync(file, pos, rc); diff --git a/fs/dcache.c b/fs/dcache.c index 87bdb5329c3c..ca8e9cd60f87 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -229,7 +229,7 @@ static void __d_free(struct rcu_head *head) */ static void d_free(struct dentry *dentry) { - BUG_ON(dentry->d_count); + BUG_ON((int)dentry->d_lockref.count > 0); this_cpu_dec(nr_dentry); if (dentry->d_op && dentry->d_op->d_release) dentry->d_op->d_release(dentry); @@ -308,8 +308,9 @@ static void dentry_unlink_inode(struct dentry * dentry) */ static void dentry_lru_add(struct dentry *dentry) { - if (list_empty(&dentry->d_lru)) { + if (unlikely(!(dentry->d_flags & DCACHE_LRU_LIST))) { spin_lock(&dcache_lru_lock); + dentry->d_flags |= DCACHE_LRU_LIST; list_add(&dentry->d_lru, &dentry->d_sb->s_dentry_lru); dentry->d_sb->s_nr_dentry_unused++; dentry_stat.nr_unused++; @@ -320,7 +321,7 @@ static void dentry_lru_add(struct dentry *dentry) static void __dentry_lru_del(struct dentry *dentry) { list_del_init(&dentry->d_lru); - dentry->d_flags &= ~DCACHE_SHRINK_LIST; + dentry->d_flags &= ~(DCACHE_SHRINK_LIST | DCACHE_LRU_LIST); dentry->d_sb->s_nr_dentry_unused--; dentry_stat.nr_unused--; } @@ -341,6 +342,7 @@ static void dentry_lru_move_list(struct dentry *dentry, struct list_head *list) { spin_lock(&dcache_lru_lock); if (list_empty(&dentry->d_lru)) { + dentry->d_flags |= DCACHE_LRU_LIST; list_add_tail(&dentry->d_lru, list); dentry->d_sb->s_nr_dentry_unused++; dentry_stat.nr_unused++; @@ -443,7 +445,7 @@ EXPORT_SYMBOL(d_drop); * If ref is non-zero, then decrement the refcount too. * Returns dentry requiring refcount drop, or NULL if we're done. */ -static inline struct dentry *dentry_kill(struct dentry *dentry, int ref) +static inline struct dentry *dentry_kill(struct dentry *dentry) __releases(dentry->d_lock) { struct inode *inode; @@ -466,13 +468,16 @@ relock: goto relock; } - if (ref) - dentry->d_count--; + /* + * The dentry is now unrecoverably dead to the world. + */ + lockref_mark_dead(&dentry->d_lockref); + /* * inform the fs via d_prune that this dentry is about to be * unhashed and destroyed. */ - if (dentry->d_flags & DCACHE_OP_PRUNE) + if ((dentry->d_flags & DCACHE_OP_PRUNE) && !d_unhashed(dentry)) dentry->d_op->d_prune(dentry); dentry_lru_del(dentry); @@ -509,38 +514,31 @@ relock: */ void dput(struct dentry *dentry) { - if (!dentry) + if (unlikely(!dentry)) return; repeat: - if (dentry->d_count == 1) - might_sleep(); - spin_lock(&dentry->d_lock); - BUG_ON(!dentry->d_count); - if (dentry->d_count > 1) { - dentry->d_count--; - spin_unlock(&dentry->d_lock); + if (lockref_put_or_lock(&dentry->d_lockref)) return; - } - if (dentry->d_flags & DCACHE_OP_DELETE) { + /* Unreachable? Get rid of it */ + if (unlikely(d_unhashed(dentry))) + goto kill_it; + + if (unlikely(dentry->d_flags & DCACHE_OP_DELETE)) { if (dentry->d_op->d_delete(dentry)) goto kill_it; } - /* Unreachable? Get rid of it */ - if (d_unhashed(dentry)) - goto kill_it; - dentry->d_flags |= DCACHE_REFERENCED; dentry_lru_add(dentry); - dentry->d_count--; + dentry->d_lockref.count--; spin_unlock(&dentry->d_lock); return; kill_it: - dentry = dentry_kill(dentry, 1); + dentry = dentry_kill(dentry); if (dentry) goto repeat; } @@ -590,7 +588,7 @@ int d_invalidate(struct dentry * dentry) * We also need to leave mountpoints alone, * directory or not. */ - if (dentry->d_count > 1 && dentry->d_inode) { + if (dentry->d_lockref.count > 1 && dentry->d_inode) { if (S_ISDIR(dentry->d_inode->i_mode) || d_mountpoint(dentry)) { spin_unlock(&dentry->d_lock); return -EBUSY; @@ -606,20 +604,33 @@ EXPORT_SYMBOL(d_invalidate); /* This must be called with d_lock held */ static inline void __dget_dlock(struct dentry *dentry) { - dentry->d_count++; + dentry->d_lockref.count++; } static inline void __dget(struct dentry *dentry) { - spin_lock(&dentry->d_lock); - __dget_dlock(dentry); - spin_unlock(&dentry->d_lock); + lockref_get(&dentry->d_lockref); } struct dentry *dget_parent(struct dentry *dentry) { + int gotref; struct dentry *ret; + /* + * Do optimistic parent lookup without any + * locking. + */ + rcu_read_lock(); + ret = ACCESS_ONCE(dentry->d_parent); + gotref = lockref_get_not_zero(&ret->d_lockref); + rcu_read_unlock(); + if (likely(gotref)) { + if (likely(ret == ACCESS_ONCE(dentry->d_parent))) + return ret; + dput(ret); + } + repeat: /* * Don't need rcu_dereference because we re-check it was correct under @@ -634,8 +645,8 @@ repeat: goto repeat; } rcu_read_unlock(); - BUG_ON(!ret->d_count); - ret->d_count++; + BUG_ON(!ret->d_lockref.count); + ret->d_lockref.count++; spin_unlock(&ret->d_lock); return ret; } @@ -718,7 +729,15 @@ restart: spin_lock(&inode->i_lock); hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) { spin_lock(&dentry->d_lock); - if (!dentry->d_count) { + if (!dentry->d_lockref.count) { + /* + * inform the fs via d_prune that this dentry + * is about to be unhashed and destroyed. + */ + if ((dentry->d_flags & DCACHE_OP_PRUNE) && + !d_unhashed(dentry)) + dentry->d_op->d_prune(dentry); + __dget_dlock(dentry); __d_drop(dentry); spin_unlock(&dentry->d_lock); @@ -744,7 +763,7 @@ static void try_prune_one_dentry(struct dentry *dentry) { struct dentry *parent; - parent = dentry_kill(dentry, 0); + parent = dentry_kill(dentry); /* * If dentry_kill returns NULL, we have nothing more to do. * if it returns the same dentry, trylocks failed. In either @@ -763,13 +782,9 @@ static void try_prune_one_dentry(struct dentry *dentry) /* Prune ancestors. */ dentry = parent; while (dentry) { - spin_lock(&dentry->d_lock); - if (dentry->d_count > 1) { - dentry->d_count--; - spin_unlock(&dentry->d_lock); + if (lockref_put_or_lock(&dentry->d_lockref)) return; - } - dentry = dentry_kill(dentry, 1); + dentry = dentry_kill(dentry); } } @@ -793,7 +808,7 @@ static void shrink_dentry_list(struct list_head *list) * the LRU because of laziness during lookup. Do not free * it - just keep it off the LRU list. */ - if (dentry->d_count) { + if (dentry->d_lockref.count) { dentry_lru_del(dentry); spin_unlock(&dentry->d_lock); continue; @@ -907,13 +922,14 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) * inform the fs that this dentry is about to be * unhashed and destroyed. */ - if (dentry->d_flags & DCACHE_OP_PRUNE) + if ((dentry->d_flags & DCACHE_OP_PRUNE) && + !d_unhashed(dentry)) dentry->d_op->d_prune(dentry); dentry_lru_del(dentry); __d_shrink(dentry); - if (dentry->d_count != 0) { + if (dentry->d_lockref.count != 0) { printk(KERN_ERR "BUG: Dentry %p{i=%lx,n=%s}" " still in use (%d)" @@ -922,7 +938,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) dentry->d_inode ? dentry->d_inode->i_ino : 0UL, dentry->d_name.name, - dentry->d_count, + dentry->d_lockref.count, dentry->d_sb->s_type->name, dentry->d_sb->s_id); BUG(); @@ -933,7 +949,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) list_del(&dentry->d_u.d_child); } else { parent = dentry->d_parent; - parent->d_count--; + parent->d_lockref.count--; list_del(&dentry->d_u.d_child); } @@ -981,7 +997,7 @@ void shrink_dcache_for_umount(struct super_block *sb) dentry = sb->s_root; sb->s_root = NULL; - dentry->d_count--; + dentry->d_lockref.count--; shrink_dcache_for_umount_subtree(dentry); while (!hlist_bl_empty(&sb->s_anon)) { @@ -1018,34 +1034,56 @@ static struct dentry *try_to_ascend(struct dentry *old, int locked, unsigned seq return new; } +/** + * enum d_walk_ret - action to talke during tree walk + * @D_WALK_CONTINUE: contrinue walk + * @D_WALK_QUIT: quit walk + * @D_WALK_NORETRY: quit when retry is needed + * @D_WALK_SKIP: skip this dentry and its children + */ +enum d_walk_ret { + D_WALK_CONTINUE, + D_WALK_QUIT, + D_WALK_NORETRY, + D_WALK_SKIP, +}; -/* - * Search for at least 1 mount point in the dentry's subdirs. - * We descend to the next level whenever the d_subdirs - * list is non-empty and continue searching. - */ - /** - * have_submounts - check for mounts over a dentry - * @parent: dentry to check. + * d_walk - walk the dentry tree + * @parent: start of walk + * @data: data passed to @enter() and @finish() + * @enter: callback when first entering the dentry + * @finish: callback when successfully finished the walk * - * Return true if the parent or its subdirectories contain - * a mount point + * The @enter() and @finish() callbacks are called with d_lock held. */ -int have_submounts(struct dentry *parent) +static void d_walk(struct dentry *parent, void *data, + enum d_walk_ret (*enter)(void *, struct dentry *), + void (*finish)(void *)) { struct dentry *this_parent; struct list_head *next; unsigned seq; int locked = 0; + enum d_walk_ret ret; + bool retry = true; seq = read_seqbegin(&rename_lock); again: this_parent = parent; - - if (d_mountpoint(parent)) - goto positive; spin_lock(&this_parent->d_lock); + + ret = enter(data, this_parent); + switch (ret) { + case D_WALK_CONTINUE: + break; + case D_WALK_QUIT: + case D_WALK_SKIP: + goto out_unlock; + case D_WALK_NORETRY: + retry = false; + break; + } repeat: next = this_parent->d_subdirs.next; resume: @@ -1055,12 +1093,22 @@ resume: next = tmp->next; spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); - /* Have we found a mount point ? */ - if (d_mountpoint(dentry)) { + + ret = enter(data, dentry); + switch (ret) { + case D_WALK_CONTINUE: + break; + case D_WALK_QUIT: spin_unlock(&dentry->d_lock); - spin_unlock(&this_parent->d_lock); - goto positive; + goto out_unlock; + case D_WALK_NORETRY: + retry = false; + break; + case D_WALK_SKIP: + spin_unlock(&dentry->d_lock); + continue; } + if (!list_empty(&dentry->d_subdirs)) { spin_unlock(&this_parent->d_lock); spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_); @@ -1081,29 +1129,97 @@ resume: next = child->d_u.d_child.next; goto resume; } - spin_unlock(&this_parent->d_lock); - if (!locked && read_seqretry(&rename_lock, seq)) - goto rename_retry; - if (locked) - write_sequnlock(&rename_lock); - return 0; /* No mount points found in tree */ -positive: - if (!locked && read_seqretry(&rename_lock, seq)) + if (!locked && read_seqretry(&rename_lock, seq)) { + spin_unlock(&this_parent->d_lock); goto rename_retry; + } + if (finish) + finish(data); + +out_unlock: + spin_unlock(&this_parent->d_lock); if (locked) write_sequnlock(&rename_lock); - return 1; + return; rename_retry: + if (!retry) + return; if (locked) goto again; locked = 1; write_seqlock(&rename_lock); goto again; } + +/* + * Search for at least 1 mount point in the dentry's subdirs. + * We descend to the next level whenever the d_subdirs + * list is non-empty and continue searching. + */ + +/** + * have_submounts - check for mounts over a dentry + * @parent: dentry to check. + * + * Return true if the parent or its subdirectories contain + * a mount point + */ + +static enum d_walk_ret check_mount(void *data, struct dentry *dentry) +{ + int *ret = data; + if (d_mountpoint(dentry)) { + *ret = 1; + return D_WALK_QUIT; + } + return D_WALK_CONTINUE; +} + +int have_submounts(struct dentry *parent) +{ + int ret = 0; + + d_walk(parent, &ret, check_mount, NULL); + + return ret; +} EXPORT_SYMBOL(have_submounts); /* + * Called by mount code to set a mountpoint and check if the mountpoint is + * reachable (e.g. NFS can unhash a directory dentry and then the complete + * subtree can become unreachable). + * + * Only one of check_submounts_and_drop() and d_set_mounted() must succeed. For + * this reason take rename_lock and d_lock on dentry and ancestors. + */ +int d_set_mounted(struct dentry *dentry) +{ + struct dentry *p; + int ret = -ENOENT; + write_seqlock(&rename_lock); + for (p = dentry->d_parent; !IS_ROOT(p); p = p->d_parent) { + /* Need exclusion wrt. check_submounts_and_drop() */ + spin_lock(&p->d_lock); + if (unlikely(d_unhashed(p))) { + spin_unlock(&p->d_lock); + goto out; + } + spin_unlock(&p->d_lock); + } + spin_lock(&dentry->d_lock); + if (!d_unlinked(dentry)) { + dentry->d_flags |= DCACHE_MOUNTED; + ret = 0; + } + spin_unlock(&dentry->d_lock); +out: + write_sequnlock(&rename_lock); + return ret; +} + +/* * Search the dentry child list of the specified parent, * and move any unused dentries to the end of the unused * list for prune_dcache(). We descend to the next level @@ -1117,93 +1233,46 @@ EXPORT_SYMBOL(have_submounts); * drop the lock and return early due to latency * constraints. */ -static int select_parent(struct dentry *parent, struct list_head *dispose) -{ - struct dentry *this_parent; - struct list_head *next; - unsigned seq; - int found = 0; - int locked = 0; - - seq = read_seqbegin(&rename_lock); -again: - this_parent = parent; - spin_lock(&this_parent->d_lock); -repeat: - next = this_parent->d_subdirs.next; -resume: - while (next != &this_parent->d_subdirs) { - struct list_head *tmp = next; - struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child); - next = tmp->next; - spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); +struct select_data { + struct dentry *start; + struct list_head dispose; + int found; +}; - /* - * move only zero ref count dentries to the dispose list. - * - * Those which are presently on the shrink list, being processed - * by shrink_dentry_list(), shouldn't be moved. Otherwise the - * loop in shrink_dcache_parent() might not make any progress - * and loop forever. - */ - if (dentry->d_count) { - dentry_lru_del(dentry); - } else if (!(dentry->d_flags & DCACHE_SHRINK_LIST)) { - dentry_lru_move_list(dentry, dispose); - dentry->d_flags |= DCACHE_SHRINK_LIST; - found++; - } - /* - * We can return to the caller if we have found some (this - * ensures forward progress). We'll be coming back to find - * the rest. - */ - if (found && need_resched()) { - spin_unlock(&dentry->d_lock); - goto out; - } +static enum d_walk_ret select_collect(void *_data, struct dentry *dentry) +{ + struct select_data *data = _data; + enum d_walk_ret ret = D_WALK_CONTINUE; - /* - * Descend a level if the d_subdirs list is non-empty. - */ - if (!list_empty(&dentry->d_subdirs)) { - spin_unlock(&this_parent->d_lock); - spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_); - this_parent = dentry; - spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_); - goto repeat; - } + if (data->start == dentry) + goto out; - spin_unlock(&dentry->d_lock); - } /* - * All done at this level ... ascend and resume the search. + * move only zero ref count dentries to the dispose list. + * + * Those which are presently on the shrink list, being processed + * by shrink_dentry_list(), shouldn't be moved. Otherwise the + * loop in shrink_dcache_parent() might not make any progress + * and loop forever. */ - if (this_parent != parent) { - struct dentry *child = this_parent; - this_parent = try_to_ascend(this_parent, locked, seq); - if (!this_parent) - goto rename_retry; - next = child->d_u.d_child.next; - goto resume; + if (dentry->d_lockref.count) { + dentry_lru_del(dentry); + } else if (!(dentry->d_flags & DCACHE_SHRINK_LIST)) { + dentry_lru_move_list(dentry, &data->dispose); + dentry->d_flags |= DCACHE_SHRINK_LIST; + data->found++; + ret = D_WALK_NORETRY; } + /* + * We can return to the caller if we have found some (this + * ensures forward progress). We'll be coming back to find + * the rest. + */ + if (data->found && need_resched()) + ret = D_WALK_QUIT; out: - spin_unlock(&this_parent->d_lock); - if (!locked && read_seqretry(&rename_lock, seq)) - goto rename_retry; - if (locked) - write_sequnlock(&rename_lock); - return found; - -rename_retry: - if (found) - return found; - if (locked) - goto again; - locked = 1; - write_seqlock(&rename_lock); - goto again; + return ret; } /** @@ -1212,18 +1281,90 @@ rename_retry: * * Prune the dcache to remove unused children of the parent dentry. */ -void shrink_dcache_parent(struct dentry * parent) +void shrink_dcache_parent(struct dentry *parent) { - LIST_HEAD(dispose); - int found; + for (;;) { + struct select_data data; + + INIT_LIST_HEAD(&data.dispose); + data.start = parent; + data.found = 0; - while ((found = select_parent(parent, &dispose)) != 0) { - shrink_dentry_list(&dispose); + d_walk(parent, &data, select_collect, NULL); + if (!data.found) + break; + + shrink_dentry_list(&data.dispose); cond_resched(); } } EXPORT_SYMBOL(shrink_dcache_parent); +static enum d_walk_ret check_and_collect(void *_data, struct dentry *dentry) +{ + struct select_data *data = _data; + + if (d_mountpoint(dentry)) { + data->found = -EBUSY; + return D_WALK_QUIT; + } + + return select_collect(_data, dentry); +} + +static void check_and_drop(void *_data) +{ + struct select_data *data = _data; + + if (d_mountpoint(data->start)) + data->found = -EBUSY; + if (!data->found) + __d_drop(data->start); +} + +/** + * check_submounts_and_drop - prune dcache, check for submounts and drop + * + * All done as a single atomic operation relative to has_unlinked_ancestor(). + * Returns 0 if successfully unhashed @parent. If there were submounts then + * return -EBUSY. + * + * @dentry: dentry to prune and drop + */ +int check_submounts_and_drop(struct dentry *dentry) +{ + int ret = 0; + + /* Negative dentries can be dropped without further checks */ + if (!dentry->d_inode) { + d_drop(dentry); + goto out; + } + + for (;;) { + struct select_data data; + + INIT_LIST_HEAD(&data.dispose); + data.start = dentry; + data.found = 0; + + d_walk(dentry, &data, check_and_collect, check_and_drop); + ret = data.found; + + if (!list_empty(&data.dispose)) + shrink_dentry_list(&data.dispose); + + if (ret <= 0) + break; + + cond_resched(); + } + +out: + return ret; +} +EXPORT_SYMBOL(check_submounts_and_drop); + /** * __d_alloc - allocate a dcache entry * @sb: filesystem it will belong to @@ -1269,7 +1410,7 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name) smp_wmb(); dentry->d_name.name = dname; - dentry->d_count = 1; + dentry->d_lockref.count = 1; dentry->d_flags = 0; spin_lock_init(&dentry->d_lock); seqcount_init(&dentry->d_seq); @@ -1782,7 +1923,7 @@ static noinline enum slow_d_compare slow_dentry_cmp( * without taking d_lock and checking d_seq sequence count against @seq * returned here. * - * A refcount may be taken on the found dentry with the __d_rcu_to_refcount + * A refcount may be taken on the found dentry with the d_rcu_to_refcount * function. * * Alternatively, __d_lookup_rcu may be called again to look up the child of @@ -1970,7 +2111,7 @@ struct dentry *__d_lookup(const struct dentry *parent, const struct qstr *name) goto next; } - dentry->d_count++; + dentry->d_lockref.count++; found = dentry; spin_unlock(&dentry->d_lock); break; @@ -2069,7 +2210,7 @@ again: spin_lock(&dentry->d_lock); inode = dentry->d_inode; isdir = S_ISDIR(inode->i_mode); - if (dentry->d_count == 1) { + if (dentry->d_lockref.count == 1) { if (!spin_trylock(&inode->i_lock)) { spin_unlock(&dentry->d_lock); cpu_relax(); @@ -2724,6 +2865,17 @@ char *dynamic_dname(struct dentry *dentry, char *buffer, int buflen, return memcpy(buffer, temp, sz); } +char *simple_dname(struct dentry *dentry, char *buffer, int buflen) +{ + char *end = buffer + buflen; + /* these dentries are never renamed, so d_lock is not needed */ + if (prepend(&end, &buflen, " (deleted)", 11) || + prepend_name(&end, &buflen, &dentry->d_name) || + prepend(&end, &buflen, "/", 1)) + end = ERR_PTR(-ENAMETOOLONG); + return end; +} + /* * Write full pathname from the root of the filesystem into the buffer. */ @@ -2904,68 +3056,24 @@ int is_subdir(struct dentry *new_dentry, struct dentry *old_dentry) return result; } -void d_genocide(struct dentry *root) +static enum d_walk_ret d_genocide_kill(void *data, struct dentry *dentry) { - struct dentry *this_parent; - struct list_head *next; - unsigned seq; - int locked = 0; - - seq = read_seqbegin(&rename_lock); -again: - this_parent = root; - spin_lock(&this_parent->d_lock); -repeat: - next = this_parent->d_subdirs.next; -resume: - while (next != &this_parent->d_subdirs) { - struct list_head *tmp = next; - struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child); - next = tmp->next; + struct dentry *root = data; + if (dentry != root) { + if (d_unhashed(dentry) || !dentry->d_inode) + return D_WALK_SKIP; - spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); - if (d_unhashed(dentry) || !dentry->d_inode) { - spin_unlock(&dentry->d_lock); - continue; - } - if (!list_empty(&dentry->d_subdirs)) { - spin_unlock(&this_parent->d_lock); - spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_); - this_parent = dentry; - spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_); - goto repeat; - } if (!(dentry->d_flags & DCACHE_GENOCIDE)) { dentry->d_flags |= DCACHE_GENOCIDE; - dentry->d_count--; - } - spin_unlock(&dentry->d_lock); - } - if (this_parent != root) { - struct dentry *child = this_parent; - if (!(this_parent->d_flags & DCACHE_GENOCIDE)) { - this_parent->d_flags |= DCACHE_GENOCIDE; - this_parent->d_count--; + dentry->d_lockref.count--; } - this_parent = try_to_ascend(this_parent, locked, seq); - if (!this_parent) - goto rename_retry; - next = child->d_u.d_child.next; - goto resume; } - spin_unlock(&this_parent->d_lock); - if (!locked && read_seqretry(&rename_lock, seq)) - goto rename_retry; - if (locked) - write_sequnlock(&rename_lock); - return; + return D_WALK_CONTINUE; +} -rename_retry: - if (locked) - goto again; - locked = 1; - write_seqlock(&rename_lock); - goto again; +void d_genocide(struct dentry *parent) +{ + d_walk(parent, parent, d_genocide_kill, NULL); } void d_tmpfile(struct dentry *dentry, struct inode *inode) diff --git a/fs/direct-io.c b/fs/direct-io.c index 7ab90f5081ee..1782023bd68a 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -127,6 +127,7 @@ struct dio { spinlock_t bio_lock; /* protects BIO fields below */ int page_errors; /* errno from get_user_pages() */ int is_async; /* is IO async ? */ + bool defer_completion; /* defer AIO completion to workqueue? */ int io_error; /* IO error in completion path */ unsigned long refcount; /* direct_io_worker() and bios */ struct bio *bio_list; /* singly linked via bi_private */ @@ -141,7 +142,10 @@ struct dio { * allocation time. Don't add new fields after pages[] unless you * wish that they not be zeroed. */ - struct page *pages[DIO_PAGES]; /* page buffer */ + union { + struct page *pages[DIO_PAGES]; /* page buffer */ + struct work_struct complete_work;/* deferred AIO completion */ + }; } ____cacheline_aligned_in_smp; static struct kmem_cache *dio_cache __read_mostly; @@ -221,16 +225,16 @@ static inline struct page *dio_get_page(struct dio *dio, * dio_complete() - called when all DIO BIO I/O has been completed * @offset: the byte offset in the file of the completed operation * - * This releases locks as dictated by the locking type, lets interested parties - * know that a DIO operation has completed, and calculates the resulting return - * code for the operation. + * This drops i_dio_count, lets interested parties know that a DIO operation + * has completed, and calculates the resulting return code for the operation. * * It lets the filesystem know if it registered an interest earlier via * get_block. Pass the private field of the map buffer_head so that * filesystems can use it to hold additional state between get_block calls and * dio_complete. */ -static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is_async) +static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, + bool is_async) { ssize_t transferred = 0; @@ -258,19 +262,36 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is if (ret == 0) ret = transferred; - if (dio->end_io && dio->result) { - dio->end_io(dio->iocb, offset, transferred, - dio->private, ret, is_async); - } else { - inode_dio_done(dio->inode); - if (is_async) - aio_complete(dio->iocb, ret, 0); + if (dio->end_io && dio->result) + dio->end_io(dio->iocb, offset, transferred, dio->private); + + inode_dio_done(dio->inode); + if (is_async) { + if (dio->rw & WRITE) { + int err; + + err = generic_write_sync(dio->iocb->ki_filp, offset, + transferred); + if (err < 0 && ret > 0) + ret = err; + } + + aio_complete(dio->iocb, ret, 0); } + kmem_cache_free(dio_cache, dio); return ret; } +static void dio_aio_complete_work(struct work_struct *work) +{ + struct dio *dio = container_of(work, struct dio, complete_work); + + dio_complete(dio, dio->iocb->ki_pos, 0, true); +} + static int dio_bio_complete(struct dio *dio, struct bio *bio); + /* * Asynchronous IO callback. */ @@ -290,8 +311,13 @@ static void dio_bio_end_aio(struct bio *bio, int error) spin_unlock_irqrestore(&dio->bio_lock, flags); if (remaining == 0) { - dio_complete(dio, dio->iocb->ki_pos, 0, true); - kmem_cache_free(dio_cache, dio); + if (dio->result && dio->defer_completion) { + INIT_WORK(&dio->complete_work, dio_aio_complete_work); + queue_work(dio->inode->i_sb->s_dio_done_wq, + &dio->complete_work); + } else { + dio_complete(dio, dio->iocb->ki_pos, 0, true); + } } } @@ -511,6 +537,41 @@ static inline int dio_bio_reap(struct dio *dio, struct dio_submit *sdio) } /* + * Create workqueue for deferred direct IO completions. We allocate the + * workqueue when it's first needed. This avoids creating workqueue for + * filesystems that don't need it and also allows us to create the workqueue + * late enough so the we can include s_id in the name of the workqueue. + */ +static int sb_init_dio_done_wq(struct super_block *sb) +{ + struct workqueue_struct *wq = alloc_workqueue("dio/%s", + WQ_MEM_RECLAIM, 0, + sb->s_id); + if (!wq) + return -ENOMEM; + /* + * This has to be atomic as more DIOs can race to create the workqueue + */ + cmpxchg(&sb->s_dio_done_wq, NULL, wq); + /* Someone created workqueue before us? Free ours... */ + if (wq != sb->s_dio_done_wq) + destroy_workqueue(wq); + return 0; +} + +static int dio_set_defer_completion(struct dio *dio) +{ + struct super_block *sb = dio->inode->i_sb; + + if (dio->defer_completion) + return 0; + dio->defer_completion = true; + if (!sb->s_dio_done_wq) + return sb_init_dio_done_wq(sb); + return 0; +} + +/* * Call into the fs to map some more disk blocks. We record the current number * of available blocks at sdio->blocks_available. These are in units of the * fs blocksize, (1 << inode->i_blkbits). @@ -581,6 +642,9 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio, /* Store for completion */ dio->private = map_bh->b_private; + + if (ret == 0 && buffer_defer_completion(map_bh)) + ret = dio_set_defer_completion(dio); } return ret; } @@ -1129,11 +1193,6 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, } /* - * Will be decremented at I/O completion time. - */ - atomic_inc(&inode->i_dio_count); - - /* * For file extending writes updating i_size before data * writeouts complete can expose uninitialized blocks. So * even for AIO, we need to wait for i/o to complete before @@ -1141,11 +1200,33 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, */ dio->is_async = !is_sync_kiocb(iocb) && !((rw & WRITE) && (end > i_size_read(inode))); - - retval = 0; - dio->inode = inode; dio->rw = rw; + + /* + * For AIO O_(D)SYNC writes we need to defer completions to a workqueue + * so that we can call ->fsync. + */ + if (dio->is_async && (rw & WRITE) && + ((iocb->ki_filp->f_flags & O_DSYNC) || + IS_SYNC(iocb->ki_filp->f_mapping->host))) { + retval = dio_set_defer_completion(dio); + if (retval) { + /* + * We grab i_mutex only for reads so we don't have + * to release it here + */ + kmem_cache_free(dio_cache, dio); + goto out; + } + } + + /* + * Will be decremented at I/O completion time. + */ + atomic_inc(&inode->i_dio_count); + + retval = 0; sdio.blkbits = blkbits; sdio.blkfactor = i_blkbits - blkbits; sdio.block_in_file = offset >> blkbits; @@ -1269,7 +1350,6 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, if (drop_refcount(dio) == 0) { retval = dio_complete(dio, offset, retval, false); - kmem_cache_free(dio_cache, dio); } else BUG_ON(retval != -EIOCBQUEUED); diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c index 27a6ba9aaeec..0e90f0c91b93 100644 --- a/fs/dlm/ast.c +++ b/fs/dlm/ast.c @@ -267,10 +267,7 @@ void dlm_callback_work(struct work_struct *work) int dlm_callback_start(struct dlm_ls *ls) { ls->ls_callback_wq = alloc_workqueue("dlm_callback", - WQ_UNBOUND | - WQ_MEM_RECLAIM | - WQ_NON_REENTRANT, - 0); + WQ_UNBOUND | WQ_MEM_RECLAIM, 0); if (!ls->ls_callback_wq) { log_print("can't start dlm_callback workqueue"); return -ENOMEM; diff --git a/fs/dlm/user.c b/fs/dlm/user.c index 812149119fa3..142e21655eed 100644 --- a/fs/dlm/user.c +++ b/fs/dlm/user.c @@ -493,7 +493,6 @@ static ssize_t device_write(struct file *file, const char __user *buf, { struct dlm_user_proc *proc = file->private_data; struct dlm_write_request *kbuf; - sigset_t tmpsig, allsigs; int error; #ifdef CONFIG_COMPAT @@ -557,9 +556,6 @@ static ssize_t device_write(struct file *file, const char __user *buf, goto out_free; } - sigfillset(&allsigs); - sigprocmask(SIG_BLOCK, &allsigs, &tmpsig); - error = -EINVAL; switch (kbuf->cmd) @@ -567,7 +563,7 @@ static ssize_t device_write(struct file *file, const char __user *buf, case DLM_USER_LOCK: if (!proc) { log_print("no locking on control device"); - goto out_sig; + goto out_free; } error = device_user_lock(proc, &kbuf->i.lock); break; @@ -575,7 +571,7 @@ static ssize_t device_write(struct file *file, const char __user *buf, case DLM_USER_UNLOCK: if (!proc) { log_print("no locking on control device"); - goto out_sig; + goto out_free; } error = device_user_unlock(proc, &kbuf->i.lock); break; @@ -583,7 +579,7 @@ static ssize_t device_write(struct file *file, const char __user *buf, case DLM_USER_DEADLOCK: if (!proc) { log_print("no locking on control device"); - goto out_sig; + goto out_free; } error = device_user_deadlock(proc, &kbuf->i.lock); break; @@ -591,7 +587,7 @@ static ssize_t device_write(struct file *file, const char __user *buf, case DLM_USER_CREATE_LOCKSPACE: if (proc) { log_print("create/remove only on control device"); - goto out_sig; + goto out_free; } error = device_create_lockspace(&kbuf->i.lspace); break; @@ -599,7 +595,7 @@ static ssize_t device_write(struct file *file, const char __user *buf, case DLM_USER_REMOVE_LOCKSPACE: if (proc) { log_print("create/remove only on control device"); - goto out_sig; + goto out_free; } error = device_remove_lockspace(&kbuf->i.lspace); break; @@ -607,7 +603,7 @@ static ssize_t device_write(struct file *file, const char __user *buf, case DLM_USER_PURGE: if (!proc) { log_print("no locking on control device"); - goto out_sig; + goto out_free; } error = device_user_purge(proc, &kbuf->i.purge); break; @@ -617,8 +613,6 @@ static ssize_t device_write(struct file *file, const char __user *buf, kbuf->cmd); } - out_sig: - sigprocmask(SIG_SETMASK, &tmpsig, NULL); out_free: kfree(kbuf); return error; @@ -659,15 +653,11 @@ static int device_close(struct inode *inode, struct file *file) { struct dlm_user_proc *proc = file->private_data; struct dlm_ls *ls; - sigset_t tmpsig, allsigs; ls = dlm_find_lockspace_local(proc->lockspace); if (!ls) return -ENOENT; - sigfillset(&allsigs); - sigprocmask(SIG_BLOCK, &allsigs, &tmpsig); - set_bit(DLM_PROC_FLAGS_CLOSING, &proc->flags); dlm_clear_proc_locks(ls, proc); @@ -685,8 +675,6 @@ static int device_close(struct inode *inode, struct file *file) /* FIXME: AUTOFREE: if this ls is no longer used do device_remove_lockspace() */ - sigprocmask(SIG_SETMASK, &tmpsig, NULL); - return 0; } diff --git a/fs/efs/inode.c b/fs/efs/inode.c index f3913eb2c474..d15ccf20f1b3 100644 --- a/fs/efs/inode.c +++ b/fs/efs/inode.c @@ -57,7 +57,7 @@ struct inode *efs_iget(struct super_block *super, unsigned long ino) struct inode *inode; inode = iget_locked(super, ino); - if (IS_ERR(inode)) + if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 9ad17b15b454..293f86741ddb 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1792,7 +1792,7 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, { int error; int did_lock_epmutex = 0; - struct file *file, *tfile; + struct fd f, tf; struct eventpoll *ep; struct epitem *epi; struct epoll_event epds; @@ -1802,20 +1802,19 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, copy_from_user(&epds, event, sizeof(struct epoll_event))) goto error_return; - /* Get the "struct file *" for the eventpoll file */ error = -EBADF; - file = fget(epfd); - if (!file) + f = fdget(epfd); + if (!f.file) goto error_return; /* Get the "struct file *" for the target file */ - tfile = fget(fd); - if (!tfile) + tf = fdget(fd); + if (!tf.file) goto error_fput; /* The target file descriptor must support poll */ error = -EPERM; - if (!tfile->f_op || !tfile->f_op->poll) + if (!tf.file->f_op || !tf.file->f_op->poll) goto error_tgt_fput; /* Check if EPOLLWAKEUP is allowed */ @@ -1828,14 +1827,14 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, * adding an epoll file descriptor inside itself. */ error = -EINVAL; - if (file == tfile || !is_file_epoll(file)) + if (f.file == tf.file || !is_file_epoll(f.file)) goto error_tgt_fput; /* * At this point it is safe to assume that the "private_data" contains * our own data structure. */ - ep = file->private_data; + ep = f.file->private_data; /* * When we insert an epoll file descriptor, inside another epoll file @@ -1854,14 +1853,14 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, did_lock_epmutex = 1; } if (op == EPOLL_CTL_ADD) { - if (is_file_epoll(tfile)) { + if (is_file_epoll(tf.file)) { error = -ELOOP; - if (ep_loop_check(ep, tfile) != 0) { + if (ep_loop_check(ep, tf.file) != 0) { clear_tfile_check_list(); goto error_tgt_fput; } } else - list_add(&tfile->f_tfile_llink, &tfile_check_list); + list_add(&tf.file->f_tfile_llink, &tfile_check_list); } mutex_lock_nested(&ep->mtx, 0); @@ -1871,14 +1870,14 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, * above, we can be sure to be able to use the item looked up by * ep_find() till we release the mutex. */ - epi = ep_find(ep, tfile, fd); + epi = ep_find(ep, tf.file, fd); error = -EINVAL; switch (op) { case EPOLL_CTL_ADD: if (!epi) { epds.events |= POLLERR | POLLHUP; - error = ep_insert(ep, &epds, tfile, fd); + error = ep_insert(ep, &epds, tf.file, fd); } else error = -EEXIST; clear_tfile_check_list(); @@ -1903,9 +1902,9 @@ error_tgt_fput: if (did_lock_epmutex) mutex_unlock(&epmutex); - fput(tfile); + fdput(tf); error_fput: - fput(file); + fdput(f); error_return: return error; diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c index f522425aaa24..bafdd48eefde 100644 --- a/fs/ext3/dir.c +++ b/fs/ext3/dir.c @@ -41,7 +41,7 @@ static unsigned char get_dtype(struct super_block *sb, int filetype) /** * Check if the given dir-inode refers to an htree-indexed directory - * (or a directory which chould potentially get coverted to use htree + * (or a directory which could potentially get converted to use htree * indexing). * * Return 1 if it is a dx dir, 0 if not diff --git a/fs/ext3/super.c b/fs/ext3/super.c index c47f14750722..c50c76190373 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -27,6 +27,7 @@ #include <linux/seq_file.h> #include <linux/log2.h> #include <linux/cleancache.h> +#include <linux/namei.h> #include <asm/uaccess.h> @@ -819,6 +820,7 @@ enum { Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, + Opt_journal_path, Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, Opt_data_err_abort, Opt_data_err_ignore, Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, @@ -860,6 +862,7 @@ static const match_table_t tokens = { {Opt_journal_update, "journal=update"}, {Opt_journal_inum, "journal=%u"}, {Opt_journal_dev, "journal_dev=%u"}, + {Opt_journal_path, "journal_path=%s"}, {Opt_abort, "abort"}, {Opt_data_journal, "data=journal"}, {Opt_data_ordered, "data=ordered"}, @@ -975,6 +978,11 @@ static int parse_options (char *options, struct super_block *sb, int option; kuid_t uid; kgid_t gid; + char *journal_path; + struct inode *journal_inode; + struct path path; + int error; + #ifdef CONFIG_QUOTA int qfmt; #endif @@ -1129,6 +1137,41 @@ static int parse_options (char *options, struct super_block *sb, return 0; *journal_devnum = option; break; + case Opt_journal_path: + if (is_remount) { + ext3_msg(sb, KERN_ERR, "error: cannot specify " + "journal on remount"); + return 0; + } + + journal_path = match_strdup(&args[0]); + if (!journal_path) { + ext3_msg(sb, KERN_ERR, "error: could not dup " + "journal device string"); + return 0; + } + + error = kern_path(journal_path, LOOKUP_FOLLOW, &path); + if (error) { + ext3_msg(sb, KERN_ERR, "error: could not find " + "journal device path: error %d", error); + kfree(journal_path); + return 0; + } + + journal_inode = path.dentry->d_inode; + if (!S_ISBLK(journal_inode->i_mode)) { + ext3_msg(sb, KERN_ERR, "error: journal path %s " + "is not a block device", journal_path); + path_put(&path); + kfree(journal_path); + return 0; + } + + *journal_devnum = new_encode_dev(journal_inode->i_rdev); + path_put(&path); + kfree(journal_path); + break; case Opt_noload: set_opt (sbi->s_mount_opt, NOLOAD); break; diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index ddd715e42a5c..dc5d572ebd6a 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -184,6 +184,7 @@ void ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh, struct ext4_sb_info *sbi = EXT4_SB(sb); ext4_fsblk_t start, tmp; int flex_bg = 0; + struct ext4_group_info *grp; J_ASSERT_BH(bh, buffer_locked(bh)); @@ -191,11 +192,9 @@ void ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh, * essentially implementing a per-group read-only flag. */ if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) { ext4_error(sb, "Checksum bad for group %u", block_group); - ext4_free_group_clusters_set(sb, gdp, 0); - ext4_free_inodes_set(sb, gdp, 0); - ext4_itable_unused_set(sb, gdp, 0); - memset(bh->b_data, 0xff, sb->s_blocksize); - ext4_block_bitmap_csum_set(sb, block_group, gdp, bh); + grp = ext4_get_group_info(sb, block_group); + set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state); + set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); return; } memset(bh->b_data, 0, sb->s_blocksize); @@ -305,7 +304,7 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb, */ static ext4_fsblk_t ext4_valid_block_bitmap(struct super_block *sb, struct ext4_group_desc *desc, - unsigned int block_group, + ext4_group_t block_group, struct buffer_head *bh) { ext4_grpblk_t offset; @@ -352,10 +351,11 @@ static ext4_fsblk_t ext4_valid_block_bitmap(struct super_block *sb, void ext4_validate_block_bitmap(struct super_block *sb, struct ext4_group_desc *desc, - unsigned int block_group, + ext4_group_t block_group, struct buffer_head *bh) { ext4_fsblk_t blk; + struct ext4_group_info *grp = ext4_get_group_info(sb, block_group); if (buffer_verified(bh)) return; @@ -366,12 +366,14 @@ void ext4_validate_block_bitmap(struct super_block *sb, ext4_unlock_group(sb, block_group); ext4_error(sb, "bg %u: block %llu: invalid block bitmap", block_group, blk); + set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state); return; } if (unlikely(!ext4_block_bitmap_csum_verify(sb, block_group, desc, bh))) { ext4_unlock_group(sb, block_group); ext4_error(sb, "bg %u: bad block bitmap checksum", block_group); + set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state); return; } set_buffer_verified(bh); @@ -445,7 +447,10 @@ ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group) return bh; verify: ext4_validate_block_bitmap(sb, desc, block_group, bh); - return bh; + if (buffer_verified(bh)) + return bh; + put_bh(bh); + return NULL; } /* Returns 0 on success, 1 on error */ @@ -469,7 +474,8 @@ int ext4_wait_block_bitmap(struct super_block *sb, ext4_group_t block_group, clear_buffer_new(bh); /* Panic or remount fs read-only if block bitmap is invalid */ ext4_validate_block_bitmap(sb, desc, block_group, bh); - return 0; + /* ...but check for error just in case errors=continue. */ + return !buffer_verified(bh); } struct buffer_head * diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 3c7d288ae94c..680bb3388919 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -33,7 +33,7 @@ static int ext4_dx_readdir(struct file *, struct dir_context *); /** * Check if the given dir-inode refers to an htree-indexed directory - * (or a directory which chould potentially get coverted to use htree + * (or a directory which could potentially get converted to use htree * indexing). * * Return 1 if it is a dx dir, 0 if not diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 0ab26fbf3380..af815ea9d7cc 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -180,7 +180,6 @@ struct ext4_map_blocks { * Flags for ext4_io_end->flags */ #define EXT4_IO_END_UNWRITTEN 0x0001 -#define EXT4_IO_END_DIRECT 0x0002 /* * For converting uninitialized extents on a work queue. 'handle' is used for @@ -196,8 +195,6 @@ typedef struct ext4_io_end { unsigned int flag; /* unwritten or not */ loff_t offset; /* offset in the file */ ssize_t size; /* size of the extent */ - struct kiocb *iocb; /* iocb struct for AIO */ - int result; /* error value for AIO */ atomic_t count; /* reference counter */ } ext4_io_end_t; @@ -561,6 +558,18 @@ enum { #define EXT4_GET_BLOCKS_NO_PUT_HOLE 0x0200 /* + * The bit position of these flags must not overlap with any of the + * EXT4_GET_BLOCKS_*. They are used by ext4_ext_find_extent(), + * read_extent_tree_block(), ext4_split_extent_at(), + * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf(). + * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be + * caching the extents when reading from the extent tree while a + * truncate or punch hole operation is in progress. + */ +#define EXT4_EX_NOCACHE 0x0400 +#define EXT4_EX_FORCE_CACHE 0x0800 + +/* * Flags used by ext4_free_blocks */ #define EXT4_FREE_BLOCKS_METADATA 0x0001 @@ -569,6 +578,7 @@ enum { #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008 #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 +#define EXT4_FREE_BLOCKS_RESERVE 0x0040 /* * ioctl commands @@ -590,6 +600,7 @@ enum { #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) #define EXT4_IOC_SWAP_BOOT _IO('f', 17) +#define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) #if defined(__KERNEL__) && defined(CONFIG_COMPAT) /* @@ -900,11 +911,9 @@ struct ext4_inode_info { * Completed IOs that need unwritten extents handling and don't have * transaction reserved */ - struct list_head i_unrsv_conversion_list; atomic_t i_ioend_count; /* Number of outstanding io_end structs */ atomic_t i_unwritten; /* Nr. of inflight conversions pending */ struct work_struct i_rsv_conversion_work; - struct work_struct i_unrsv_conversion_work; spinlock_t i_block_reservation_lock; @@ -1276,8 +1285,6 @@ struct ext4_sb_info { struct flex_groups *s_flex_groups; ext4_group_t s_flex_groups_allocated; - /* workqueue for unreserved extent convertions (dio) */ - struct workqueue_struct *unrsv_conversion_wq; /* workqueue for reserved extent conversions (buffered io) */ struct workqueue_struct *rsv_conversion_wq; @@ -1340,9 +1347,6 @@ static inline void ext4_set_io_unwritten_flag(struct inode *inode, struct ext4_io_end *io_end) { if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { - /* Writeback has to have coversion transaction reserved */ - WARN_ON(EXT4_SB(inode->i_sb)->s_journal && !io_end->handle && - !(io_end->flag & EXT4_IO_END_DIRECT)); io_end->flag |= EXT4_IO_END_UNWRITTEN; atomic_inc(&EXT4_I(inode)->i_unwritten); } @@ -1375,6 +1379,7 @@ enum { nolocking */ EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ EXT4_STATE_ORDERED_MODE, /* data=ordered mode */ + EXT4_STATE_EXT_PRECACHED, /* extents have been precached */ }; #define EXT4_INODE_BIT_FNS(name, field, offset) \ @@ -1915,7 +1920,7 @@ extern ext4_group_t ext4_get_group_number(struct super_block *sb, extern void ext4_validate_block_bitmap(struct super_block *sb, struct ext4_group_desc *desc, - unsigned int block_group, + ext4_group_t block_group, struct buffer_head *bh); extern unsigned int ext4_block_group(struct super_block *sb, ext4_fsblk_t blocknr); @@ -2417,16 +2422,32 @@ do { \ #define EXT4_FREECLUSTERS_WATERMARK 0 #endif +/* Update i_disksize. Requires i_mutex to avoid races with truncate */ static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) { - /* - * XXX: replace with spinlock if seen contended -bzzz - */ + WARN_ON_ONCE(S_ISREG(inode->i_mode) && + !mutex_is_locked(&inode->i_mutex)); down_write(&EXT4_I(inode)->i_data_sem); if (newsize > EXT4_I(inode)->i_disksize) EXT4_I(inode)->i_disksize = newsize; up_write(&EXT4_I(inode)->i_data_sem); - return ; +} + +/* + * Update i_disksize after writeback has been started. Races with truncate + * are avoided by checking i_size under i_data_sem. + */ +static inline void ext4_wb_update_i_disksize(struct inode *inode, loff_t newsize) +{ + loff_t i_size; + + down_write(&EXT4_I(inode)->i_data_sem); + i_size = i_size_read(inode); + if (newsize > i_size) + newsize = i_size; + if (newsize > EXT4_I(inode)->i_disksize) + EXT4_I(inode)->i_disksize = newsize; + up_write(&EXT4_I(inode)->i_data_sem); } struct ext4_group_info { @@ -2449,9 +2470,15 @@ struct ext4_group_info { #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 #define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1 +#define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2 +#define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3 #define EXT4_MB_GRP_NEED_INIT(grp) \ (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) +#define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \ + (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state))) +#define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \ + (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state))) #define EXT4_MB_GRP_WAS_TRIMMED(grp) \ (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) @@ -2655,6 +2682,12 @@ extern int ext4_check_blockref(const char *, unsigned int, struct ext4_ext_path; struct ext4_extent; +/* + * Maximum number of logical blocks in a file; ext4_extent's ee_block is + * __le32. + */ +#define EXT_MAX_BLOCKS 0xffffffff + extern int ext4_ext_tree_init(handle_t *handle, struct inode *); extern int ext4_ext_writepage_trans_blocks(struct inode *, int); extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents); @@ -2684,7 +2717,8 @@ extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *, int); extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t, - struct ext4_ext_path *); + struct ext4_ext_path *, + int flags); extern void ext4_ext_drop_refs(struct ext4_ext_path *); extern int ext4_ext_check_inode(struct inode *inode); extern int ext4_find_delalloc_range(struct inode *inode, @@ -2693,7 +2727,7 @@ extern int ext4_find_delalloc_range(struct inode *inode, extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk); extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len); - +extern int ext4_ext_precache(struct inode *inode); /* move_extent.c */ extern void ext4_double_down_write_data_sem(struct inode *first, @@ -2716,7 +2750,6 @@ extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); extern void ext4_io_submit_init(struct ext4_io_submit *io, struct writeback_control *wbc); extern void ext4_end_io_rsv_work(struct work_struct *work); -extern void ext4_end_io_unrsv_work(struct work_struct *work); extern void ext4_io_submit(struct ext4_io_submit *io); extern int ext4_bio_write_page(struct ext4_io_submit *io, struct page *page, diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h index 51bc821ade90..5074fe23f19e 100644 --- a/fs/ext4/ext4_extents.h +++ b/fs/ext4/ext4_extents.h @@ -134,12 +134,6 @@ struct ext4_ext_path { */ /* - * Maximum number of logical blocks in a file; ext4_extent's ee_block is - * __le32. - */ -#define EXT_MAX_BLOCKS 0xffffffff - -/* * EXT_INIT_MAX_LEN is the maximum number of blocks we can have in an * initialized extent. This is 2^15 and not (2^16 - 1), since we use the * MSB of ee_len field in the extent datastructure to signify if this diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h index 2877258d9497..81cfefa9dc0c 100644 --- a/fs/ext4/ext4_jbd2.h +++ b/fs/ext4/ext4_jbd2.h @@ -197,7 +197,7 @@ static inline void ext4_journal_callback_add(handle_t *handle, * ext4_journal_callback_del: delete a registered callback * @handle: active journal transaction handle on which callback was registered * @jce: registered journal callback entry to unregister - * Return true if object was sucessfully removed + * Return true if object was successfully removed */ static inline bool ext4_journal_callback_try_del(handle_t *handle, struct ext4_journal_cb_entry *jce) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 72ba4705d4fa..54d52afcdb19 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -407,7 +407,7 @@ static int ext4_valid_extent_entries(struct inode *inode, static int __ext4_ext_check(const char *function, unsigned int line, struct inode *inode, struct ext4_extent_header *eh, - int depth) + int depth, ext4_fsblk_t pblk) { const char *error_msg; int max = 0; @@ -447,42 +447,149 @@ static int __ext4_ext_check(const char *function, unsigned int line, corrupted: ext4_error_inode(inode, function, line, 0, - "bad header/extent: %s - magic %x, " - "entries %u, max %u(%u), depth %u(%u)", - error_msg, le16_to_cpu(eh->eh_magic), - le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max), - max, le16_to_cpu(eh->eh_depth), depth); - + "pblk %llu bad header/extent: %s - magic %x, " + "entries %u, max %u(%u), depth %u(%u)", + (unsigned long long) pblk, error_msg, + le16_to_cpu(eh->eh_magic), + le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max), + max, le16_to_cpu(eh->eh_depth), depth); return -EIO; } -#define ext4_ext_check(inode, eh, depth) \ - __ext4_ext_check(__func__, __LINE__, inode, eh, depth) +#define ext4_ext_check(inode, eh, depth, pblk) \ + __ext4_ext_check(__func__, __LINE__, (inode), (eh), (depth), (pblk)) int ext4_ext_check_inode(struct inode *inode) { - return ext4_ext_check(inode, ext_inode_hdr(inode), ext_depth(inode)); + return ext4_ext_check(inode, ext_inode_hdr(inode), ext_depth(inode), 0); } -static int __ext4_ext_check_block(const char *function, unsigned int line, - struct inode *inode, - struct ext4_extent_header *eh, - int depth, - struct buffer_head *bh) +static struct buffer_head * +__read_extent_tree_block(const char *function, unsigned int line, + struct inode *inode, ext4_fsblk_t pblk, int depth, + int flags) { - int ret; + struct buffer_head *bh; + int err; - if (buffer_verified(bh)) - return 0; - ret = ext4_ext_check(inode, eh, depth); - if (ret) - return ret; + bh = sb_getblk(inode->i_sb, pblk); + if (unlikely(!bh)) + return ERR_PTR(-ENOMEM); + + if (!bh_uptodate_or_lock(bh)) { + trace_ext4_ext_load_extent(inode, pblk, _RET_IP_); + err = bh_submit_read(bh); + if (err < 0) + goto errout; + } + if (buffer_verified(bh) && !(flags & EXT4_EX_FORCE_CACHE)) + return bh; + err = __ext4_ext_check(function, line, inode, + ext_block_hdr(bh), depth, pblk); + if (err) + goto errout; set_buffer_verified(bh); - return ret; + /* + * If this is a leaf block, cache all of its entries + */ + if (!(flags & EXT4_EX_NOCACHE) && depth == 0) { + struct ext4_extent_header *eh = ext_block_hdr(bh); + struct ext4_extent *ex = EXT_FIRST_EXTENT(eh); + ext4_lblk_t prev = 0; + int i; + + for (i = le16_to_cpu(eh->eh_entries); i > 0; i--, ex++) { + unsigned int status = EXTENT_STATUS_WRITTEN; + ext4_lblk_t lblk = le32_to_cpu(ex->ee_block); + int len = ext4_ext_get_actual_len(ex); + + if (prev && (prev != lblk)) + ext4_es_cache_extent(inode, prev, + lblk - prev, ~0, + EXTENT_STATUS_HOLE); + + if (ext4_ext_is_uninitialized(ex)) + status = EXTENT_STATUS_UNWRITTEN; + ext4_es_cache_extent(inode, lblk, len, + ext4_ext_pblock(ex), status); + prev = lblk + len; + } + } + return bh; +errout: + put_bh(bh); + return ERR_PTR(err); + } -#define ext4_ext_check_block(inode, eh, depth, bh) \ - __ext4_ext_check_block(__func__, __LINE__, inode, eh, depth, bh) +#define read_extent_tree_block(inode, pblk, depth, flags) \ + __read_extent_tree_block(__func__, __LINE__, (inode), (pblk), \ + (depth), (flags)) + +/* + * This function is called to cache a file's extent information in the + * extent status tree + */ +int ext4_ext_precache(struct inode *inode) +{ + struct ext4_inode_info *ei = EXT4_I(inode); + struct ext4_ext_path *path = NULL; + struct buffer_head *bh; + int i = 0, depth, ret = 0; + + if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) + return 0; /* not an extent-mapped inode */ + + down_read(&ei->i_data_sem); + depth = ext_depth(inode); + + path = kzalloc(sizeof(struct ext4_ext_path) * (depth + 1), + GFP_NOFS); + if (path == NULL) { + up_read(&ei->i_data_sem); + return -ENOMEM; + } + + /* Don't cache anything if there are no external extent blocks */ + if (depth == 0) + goto out; + path[0].p_hdr = ext_inode_hdr(inode); + ret = ext4_ext_check(inode, path[0].p_hdr, depth, 0); + if (ret) + goto out; + path[0].p_idx = EXT_FIRST_INDEX(path[0].p_hdr); + while (i >= 0) { + /* + * If this is a leaf block or we've reached the end of + * the index block, go up + */ + if ((i == depth) || + path[i].p_idx > EXT_LAST_INDEX(path[i].p_hdr)) { + brelse(path[i].p_bh); + path[i].p_bh = NULL; + i--; + continue; + } + bh = read_extent_tree_block(inode, + ext4_idx_pblock(path[i].p_idx++), + depth - i - 1, + EXT4_EX_FORCE_CACHE); + if (IS_ERR(bh)) { + ret = PTR_ERR(bh); + break; + } + i++; + path[i].p_bh = bh; + path[i].p_hdr = ext_block_hdr(bh); + path[i].p_idx = EXT_FIRST_INDEX(path[i].p_hdr); + } + ext4_set_inode_state(inode, EXT4_STATE_EXT_PRECACHED); +out: + up_read(&ei->i_data_sem); + ext4_ext_drop_refs(path); + kfree(path); + return ret; +} #ifdef EXT_DEBUG static void ext4_ext_show_path(struct inode *inode, struct ext4_ext_path *path) @@ -716,7 +823,7 @@ int ext4_ext_tree_init(handle_t *handle, struct inode *inode) struct ext4_ext_path * ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block, - struct ext4_ext_path *path) + struct ext4_ext_path *path, int flags) { struct ext4_extent_header *eh; struct buffer_head *bh; @@ -748,20 +855,13 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block, path[ppos].p_depth = i; path[ppos].p_ext = NULL; - bh = sb_getblk(inode->i_sb, path[ppos].p_block); - if (unlikely(!bh)) { - ret = -ENOMEM; + bh = read_extent_tree_block(inode, path[ppos].p_block, --i, + flags); + if (IS_ERR(bh)) { + ret = PTR_ERR(bh); goto err; } - if (!bh_uptodate_or_lock(bh)) { - trace_ext4_ext_load_extent(inode, block, - path[ppos].p_block); - ret = bh_submit_read(bh); - if (ret < 0) { - put_bh(bh); - goto err; - } - } + eh = ext_block_hdr(bh); ppos++; if (unlikely(ppos > depth)) { @@ -773,11 +873,6 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block, } path[ppos].p_bh = bh; path[ppos].p_hdr = eh; - i--; - - ret = ext4_ext_check_block(inode, eh, i, bh); - if (ret < 0) - goto err; } path[ppos].p_depth = i; @@ -1198,7 +1293,8 @@ out: * if no free index is found, then it requests in-depth growing. */ static int ext4_ext_create_new_leaf(handle_t *handle, struct inode *inode, - unsigned int flags, + unsigned int mb_flags, + unsigned int gb_flags, struct ext4_ext_path *path, struct ext4_extent *newext) { @@ -1220,7 +1316,7 @@ repeat: if (EXT_HAS_FREE_INDEX(curp)) { /* if we found index with free entry, then use that * entry: create all needed subtree and add new leaf */ - err = ext4_ext_split(handle, inode, flags, path, newext, i); + err = ext4_ext_split(handle, inode, mb_flags, path, newext, i); if (err) goto out; @@ -1228,12 +1324,12 @@ repeat: ext4_ext_drop_refs(path); path = ext4_ext_find_extent(inode, (ext4_lblk_t)le32_to_cpu(newext->ee_block), - path); + path, gb_flags); if (IS_ERR(path)) err = PTR_ERR(path); } else { /* tree is full, time to grow in depth */ - err = ext4_ext_grow_indepth(handle, inode, flags, newext); + err = ext4_ext_grow_indepth(handle, inode, mb_flags, newext); if (err) goto out; @@ -1241,7 +1337,7 @@ repeat: ext4_ext_drop_refs(path); path = ext4_ext_find_extent(inode, (ext4_lblk_t)le32_to_cpu(newext->ee_block), - path); + path, gb_flags); if (IS_ERR(path)) { err = PTR_ERR(path); goto out; @@ -1412,29 +1508,21 @@ got_index: ix++; block = ext4_idx_pblock(ix); while (++depth < path->p_depth) { - bh = sb_bread(inode->i_sb, block); - if (bh == NULL) - return -EIO; - eh = ext_block_hdr(bh); /* subtract from p_depth to get proper eh_depth */ - if (ext4_ext_check_block(inode, eh, - path->p_depth - depth, bh)) { - put_bh(bh); - return -EIO; - } + bh = read_extent_tree_block(inode, block, + path->p_depth - depth, 0); + if (IS_ERR(bh)) + return PTR_ERR(bh); + eh = ext_block_hdr(bh); ix = EXT_FIRST_INDEX(eh); block = ext4_idx_pblock(ix); put_bh(bh); } - bh = sb_bread(inode->i_sb, block); - if (bh == NULL) - return -EIO; + bh = read_extent_tree_block(inode, block, path->p_depth - depth, 0); + if (IS_ERR(bh)) + return PTR_ERR(bh); eh = ext_block_hdr(bh); - if (ext4_ext_check_block(inode, eh, path->p_depth - depth, bh)) { - put_bh(bh); - return -EIO; - } ex = EXT_FIRST_EXTENT(eh); found_extent: *logical = le32_to_cpu(ex->ee_block); @@ -1705,7 +1793,8 @@ static void ext4_ext_try_to_merge_up(handle_t *handle, brelse(path[1].p_bh); ext4_free_blocks(handle, inode, NULL, blk, 1, - EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET); + EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET | + EXT4_FREE_BLOCKS_RESERVE); } /* @@ -1793,7 +1882,7 @@ out: */ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode, struct ext4_ext_path *path, - struct ext4_extent *newext, int flag) + struct ext4_extent *newext, int gb_flags) { struct ext4_extent_header *eh; struct ext4_extent *ex, *fex; @@ -1802,7 +1891,7 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode, int depth, len, err; ext4_lblk_t next; unsigned uninitialized = 0; - int flags = 0; + int mb_flags = 0; if (unlikely(ext4_ext_get_actual_len(newext) == 0)) { EXT4_ERROR_INODE(inode, "ext4_ext_get_actual_len(newext) == 0"); @@ -1817,7 +1906,7 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode, } /* try to insert block into found extent and return */ - if (ex && !(flag & EXT4_GET_BLOCKS_PRE_IO)) { + if (ex && !(gb_flags & EXT4_GET_BLOCKS_PRE_IO)) { /* * Try to see whether we should rather test the extent on @@ -1920,7 +2009,7 @@ prepend: if (next != EXT_MAX_BLOCKS) { ext_debug("next leaf block - %u\n", next); BUG_ON(npath != NULL); - npath = ext4_ext_find_extent(inode, next, NULL); + npath = ext4_ext_find_extent(inode, next, NULL, 0); if (IS_ERR(npath)) return PTR_ERR(npath); BUG_ON(npath->p_depth != path->p_depth); @@ -1939,9 +2028,10 @@ prepend: * There is no free space in the found leaf. * We're gonna add a new leaf in the tree. */ - if (flag & EXT4_GET_BLOCKS_METADATA_NOFAIL) - flags = EXT4_MB_USE_RESERVED; - err = ext4_ext_create_new_leaf(handle, inode, flags, path, newext); + if (gb_flags & EXT4_GET_BLOCKS_METADATA_NOFAIL) + mb_flags = EXT4_MB_USE_RESERVED; + err = ext4_ext_create_new_leaf(handle, inode, mb_flags, gb_flags, + path, newext); if (err) goto cleanup; depth = ext_depth(inode); @@ -2007,7 +2097,7 @@ has_space: merge: /* try to merge extents */ - if (!(flag & EXT4_GET_BLOCKS_PRE_IO)) + if (!(gb_flags & EXT4_GET_BLOCKS_PRE_IO)) ext4_ext_try_to_merge(handle, inode, path, nearex); @@ -2050,7 +2140,7 @@ static int ext4_fill_fiemap_extents(struct inode *inode, path = NULL; } - path = ext4_ext_find_extent(inode, block, path); + path = ext4_ext_find_extent(inode, block, path, 0); if (IS_ERR(path)) { up_read(&EXT4_I(inode)->i_data_sem); err = PTR_ERR(path); @@ -2195,8 +2285,8 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path, ext4_lblk_t block) { int depth = ext_depth(inode); - unsigned long len; - ext4_lblk_t lblock; + unsigned long len = 0; + ext4_lblk_t lblock = 0; struct ext4_extent *ex; ex = path[depth].p_ext; @@ -2233,7 +2323,6 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path, ext4_es_insert_extent(inode, lblock, len, ~0, EXTENT_STATUS_HOLE); } else { - lblock = len = 0; BUG(); } @@ -2712,7 +2801,7 @@ again: ext4_lblk_t ee_block; /* find extent for this block */ - path = ext4_ext_find_extent(inode, end, NULL); + path = ext4_ext_find_extent(inode, end, NULL, EXT4_EX_NOCACHE); if (IS_ERR(path)) { ext4_journal_stop(handle); return PTR_ERR(path); @@ -2754,6 +2843,7 @@ again: */ err = ext4_split_extent_at(handle, inode, path, end + 1, split_flag, + EXT4_EX_NOCACHE | EXT4_GET_BLOCKS_PRE_IO | EXT4_GET_BLOCKS_METADATA_NOFAIL); @@ -2782,7 +2872,7 @@ again: path[0].p_hdr = ext_inode_hdr(inode); i = 0; - if (ext4_ext_check(inode, path[0].p_hdr, depth)) { + if (ext4_ext_check(inode, path[0].p_hdr, depth, 0)) { err = -EIO; goto out; } @@ -2829,10 +2919,12 @@ again: ext_debug("move to level %d (block %llu)\n", i + 1, ext4_idx_pblock(path[i].p_idx)); memset(path + i + 1, 0, sizeof(*path)); - bh = sb_bread(sb, ext4_idx_pblock(path[i].p_idx)); - if (!bh) { + bh = read_extent_tree_block(inode, + ext4_idx_pblock(path[i].p_idx), depth - i - 1, + EXT4_EX_NOCACHE); + if (IS_ERR(bh)) { /* should we reset i_size? */ - err = -EIO; + err = PTR_ERR(bh); break; } /* Yield here to deal with large extent trees. @@ -2842,11 +2934,6 @@ again: err = -EIO; break; } - if (ext4_ext_check_block(inode, ext_block_hdr(bh), - depth - i - 1, bh)) { - err = -EIO; - break; - } path[i + 1].p_bh = bh; /* save actual number of indexes since this @@ -2961,6 +3048,23 @@ void ext4_ext_release(struct super_block *sb) #endif } +static int ext4_zeroout_es(struct inode *inode, struct ext4_extent *ex) +{ + ext4_lblk_t ee_block; + ext4_fsblk_t ee_pblock; + unsigned int ee_len; + + ee_block = le32_to_cpu(ex->ee_block); + ee_len = ext4_ext_get_actual_len(ex); + ee_pblock = ext4_ext_pblock(ex); + + if (ee_len == 0) + return 0; + + return ext4_es_insert_extent(inode, ee_block, ee_len, ee_pblock, + EXTENT_STATUS_WRITTEN); +} + /* FIXME!! we need to try to merge to left or right after zero-out */ static int ext4_ext_zeroout(struct inode *inode, struct ext4_extent *ex) { @@ -3113,7 +3217,7 @@ static int ext4_split_extent_at(handle_t *handle, goto fix_extent_len; /* update extent status tree */ - err = ext4_es_zeroout(inode, &zero_ex); + err = ext4_zeroout_es(inode, &zero_ex); goto out; } else if (err) @@ -3133,7 +3237,7 @@ fix_extent_len: * ext4_split_extents() splits an extent and mark extent which is covered * by @map as split_flags indicates * - * It may result in splitting the extent into multiple extents (upto three) + * It may result in splitting the extent into multiple extents (up to three) * There are three possibilities: * a> There is no split required * b> Splits in two extents: Split is happening at either end of the extent @@ -3181,7 +3285,7 @@ static int ext4_split_extent(handle_t *handle, * result in split of original leaf or extent zeroout. */ ext4_ext_drop_refs(path); - path = ext4_ext_find_extent(inode, map->m_lblk, path); + path = ext4_ext_find_extent(inode, map->m_lblk, path, 0); if (IS_ERR(path)) return PTR_ERR(path); depth = ext_depth(inode); @@ -3464,7 +3568,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle, out: /* If we have gotten a failure, don't zero out status tree */ if (!err) - err = ext4_es_zeroout(inode, &zero_ex); + err = ext4_zeroout_es(inode, &zero_ex); return err ? err : allocated; } @@ -3565,7 +3669,7 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle, if (err < 0) goto out; ext4_ext_drop_refs(path); - path = ext4_ext_find_extent(inode, map->m_lblk, path); + path = ext4_ext_find_extent(inode, map->m_lblk, path, 0); if (IS_ERR(path)) { err = PTR_ERR(path); goto out; @@ -4052,7 +4156,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, trace_ext4_ext_map_blocks_enter(inode, map->m_lblk, map->m_len, flags); /* find extent for this block */ - path = ext4_ext_find_extent(inode, map->m_lblk, NULL); + path = ext4_ext_find_extent(inode, map->m_lblk, NULL, 0); if (IS_ERR(path)) { err = PTR_ERR(path); path = NULL; @@ -4744,6 +4848,12 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, return error; } + if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) { + error = ext4_ext_precache(inode); + if (error) + return error; + } + /* fallback to generic here if not in extents fmt */ if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) return generic_block_fiemap(inode, fieinfo, start, len, @@ -4771,6 +4881,6 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, error = ext4_fill_fiemap_extents(inode, start_blk, len_blks, fieinfo); } - + ext4_es_lru_add(inode); return error; } diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 91cb110da1b4..2d1bdbe78c04 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -13,7 +13,6 @@ #include <linux/list_sort.h> #include "ext4.h" #include "extents_status.h" -#include "ext4_extents.h" #include <trace/events/ext4.h> @@ -263,7 +262,7 @@ void ext4_es_find_delayed_extent_range(struct inode *inode, if (tree->cache_es) { es1 = tree->cache_es; if (in_range(lblk, es1->es_lblk, es1->es_len)) { - es_debug("%u cached by [%u/%u) %llu %llx\n", + es_debug("%u cached by [%u/%u) %llu %x\n", lblk, es1->es_lblk, es1->es_len, ext4_es_pblock(es1), ext4_es_status(es1)); goto out; @@ -409,6 +408,8 @@ ext4_es_try_to_merge_right(struct inode *inode, struct extent_status *es) } #ifdef ES_AGGRESSIVE_TEST +#include "ext4_extents.h" /* Needed when ES_AGGRESSIVE_TEST is defined */ + static void ext4_es_insert_extent_ext_check(struct inode *inode, struct extent_status *es) { @@ -419,7 +420,7 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode, unsigned short ee_len; int depth, ee_status, es_status; - path = ext4_ext_find_extent(inode, es->es_lblk, NULL); + path = ext4_ext_find_extent(inode, es->es_lblk, NULL, EXT4_EX_NOCACHE); if (IS_ERR(path)) return; @@ -641,13 +642,13 @@ out: */ int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len, ext4_fsblk_t pblk, - unsigned long long status) + unsigned int status) { struct extent_status newes; ext4_lblk_t end = lblk + len - 1; int err = 0; - es_debug("add [%u/%u) %llu %llx to extent status tree of inode %lu\n", + es_debug("add [%u/%u) %llu %x to extent status tree of inode %lu\n", lblk, len, pblk, status, inode->i_ino); if (!len) @@ -684,6 +685,38 @@ error: } /* + * ext4_es_cache_extent() inserts information into the extent status + * tree if and only if there isn't information about the range in + * question already. + */ +void ext4_es_cache_extent(struct inode *inode, ext4_lblk_t lblk, + ext4_lblk_t len, ext4_fsblk_t pblk, + unsigned int status) +{ + struct extent_status *es; + struct extent_status newes; + ext4_lblk_t end = lblk + len - 1; + + newes.es_lblk = lblk; + newes.es_len = len; + ext4_es_store_pblock(&newes, pblk); + ext4_es_store_status(&newes, status); + trace_ext4_es_cache_extent(inode, &newes); + + if (!len) + return; + + BUG_ON(end < lblk); + + write_lock(&EXT4_I(inode)->i_es_lock); + + es = __es_tree_search(&EXT4_I(inode)->i_es_tree.root, lblk); + if (!es || es->es_lblk > end) + __es_insert_extent(inode, &newes); + write_unlock(&EXT4_I(inode)->i_es_lock); +} + +/* * ext4_es_lookup_extent() looks up an extent in extent status tree. * * ext4_es_lookup_extent is called by ext4_map_blocks/ext4_da_map_blocks. @@ -871,23 +904,6 @@ int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk, return err; } -int ext4_es_zeroout(struct inode *inode, struct ext4_extent *ex) -{ - ext4_lblk_t ee_block; - ext4_fsblk_t ee_pblock; - unsigned int ee_len; - - ee_block = le32_to_cpu(ex->ee_block); - ee_len = ext4_ext_get_actual_len(ex); - ee_pblock = ext4_ext_pblock(ex); - - if (ee_len == 0) - return 0; - - return ext4_es_insert_extent(inode, ee_block, ee_len, ee_pblock, - EXTENT_STATUS_WRITTEN); -} - static int ext4_inode_touch_time_cmp(void *priv, struct list_head *a, struct list_head *b) { @@ -895,6 +911,12 @@ static int ext4_inode_touch_time_cmp(void *priv, struct list_head *a, eia = list_entry(a, struct ext4_inode_info, i_es_lru); eib = list_entry(b, struct ext4_inode_info, i_es_lru); + if (ext4_test_inode_state(&eia->vfs_inode, EXT4_STATE_EXT_PRECACHED) && + !ext4_test_inode_state(&eib->vfs_inode, EXT4_STATE_EXT_PRECACHED)) + return 1; + if (!ext4_test_inode_state(&eia->vfs_inode, EXT4_STATE_EXT_PRECACHED) && + ext4_test_inode_state(&eib->vfs_inode, EXT4_STATE_EXT_PRECACHED)) + return -1; if (eia->i_touch_when == eib->i_touch_when) return 0; if (time_after(eia->i_touch_when, eib->i_touch_when)) @@ -908,21 +930,13 @@ static int __ext4_es_shrink(struct ext4_sb_info *sbi, int nr_to_scan, { struct ext4_inode_info *ei; struct list_head *cur, *tmp; - LIST_HEAD(skiped); + LIST_HEAD(skipped); int ret, nr_shrunk = 0; + int retried = 0, skip_precached = 1, nr_skipped = 0; spin_lock(&sbi->s_es_lru_lock); - /* - * If the inode that is at the head of LRU list is newer than - * last_sorted time, that means that we need to sort this list. - */ - ei = list_first_entry(&sbi->s_es_lru, struct ext4_inode_info, i_es_lru); - if (sbi->s_es_last_sorted < ei->i_touch_when) { - list_sort(NULL, &sbi->s_es_lru, ext4_inode_touch_time_cmp); - sbi->s_es_last_sorted = jiffies; - } - +retry: list_for_each_safe(cur, tmp, &sbi->s_es_lru) { /* * If we have already reclaimed all extents from extent @@ -933,9 +947,16 @@ static int __ext4_es_shrink(struct ext4_sb_info *sbi, int nr_to_scan, ei = list_entry(cur, struct ext4_inode_info, i_es_lru); - /* Skip the inode that is newer than the last_sorted time */ - if (sbi->s_es_last_sorted < ei->i_touch_when) { - list_move_tail(cur, &skiped); + /* + * Skip the inode that is newer than the last_sorted + * time. Normally we try hard to avoid shrinking + * precached inodes, but we will as a last resort. + */ + if ((sbi->s_es_last_sorted < ei->i_touch_when) || + (skip_precached && ext4_test_inode_state(&ei->vfs_inode, + EXT4_STATE_EXT_PRECACHED))) { + nr_skipped++; + list_move_tail(cur, &skipped); continue; } @@ -955,11 +976,33 @@ static int __ext4_es_shrink(struct ext4_sb_info *sbi, int nr_to_scan, } /* Move the newer inodes into the tail of the LRU list. */ - list_splice_tail(&skiped, &sbi->s_es_lru); + list_splice_tail(&skipped, &sbi->s_es_lru); + INIT_LIST_HEAD(&skipped); + + /* + * If we skipped any inodes, and we weren't able to make any + * forward progress, sort the list and try again. + */ + if ((nr_shrunk == 0) && nr_skipped && !retried) { + retried++; + list_sort(NULL, &sbi->s_es_lru, ext4_inode_touch_time_cmp); + sbi->s_es_last_sorted = jiffies; + ei = list_first_entry(&sbi->s_es_lru, struct ext4_inode_info, + i_es_lru); + /* + * If there are no non-precached inodes left on the + * list, start releasing precached extents. + */ + if (ext4_test_inode_state(&ei->vfs_inode, + EXT4_STATE_EXT_PRECACHED)) + skip_precached = 0; + goto retry; + } + spin_unlock(&sbi->s_es_lru_lock); if (locked_ei && nr_shrunk == 0) - nr_shrunk = __es_try_to_reclaim_extents(ei, nr_to_scan); + nr_shrunk = __es_try_to_reclaim_extents(locked_ei, nr_to_scan); return nr_shrunk; } @@ -1034,10 +1077,16 @@ static int __es_try_to_reclaim_extents(struct ext4_inode_info *ei, struct rb_node *node; struct extent_status *es; int nr_shrunk = 0; + static DEFINE_RATELIMIT_STATE(_rs, DEFAULT_RATELIMIT_INTERVAL, + DEFAULT_RATELIMIT_BURST); if (ei->i_es_lru_nr == 0) return 0; + if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED) && + __ratelimit(&_rs)) + ext4_warning(inode->i_sb, "forced shrink of precached extents"); + node = rb_first(&tree->root); while (node != NULL) { es = rb_entry(node, struct extent_status, rb_node); diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h index e936730cc5b0..167f4ab8ecc3 100644 --- a/fs/ext4/extents_status.h +++ b/fs/ext4/extents_status.h @@ -29,16 +29,26 @@ /* * These flags live in the high bits of extent_status.es_pblk */ -#define EXTENT_STATUS_WRITTEN (1ULL << 63) -#define EXTENT_STATUS_UNWRITTEN (1ULL << 62) -#define EXTENT_STATUS_DELAYED (1ULL << 61) -#define EXTENT_STATUS_HOLE (1ULL << 60) +#define ES_SHIFT 60 + +#define EXTENT_STATUS_WRITTEN (1 << 3) +#define EXTENT_STATUS_UNWRITTEN (1 << 2) +#define EXTENT_STATUS_DELAYED (1 << 1) +#define EXTENT_STATUS_HOLE (1 << 0) #define EXTENT_STATUS_FLAGS (EXTENT_STATUS_WRITTEN | \ EXTENT_STATUS_UNWRITTEN | \ EXTENT_STATUS_DELAYED | \ EXTENT_STATUS_HOLE) +#define ES_WRITTEN (1ULL << 63) +#define ES_UNWRITTEN (1ULL << 62) +#define ES_DELAYED (1ULL << 61) +#define ES_HOLE (1ULL << 60) + +#define ES_MASK (ES_WRITTEN | ES_UNWRITTEN | \ + ES_DELAYED | ES_HOLE) + struct ext4_sb_info; struct ext4_extent; @@ -60,7 +70,10 @@ extern void ext4_es_init_tree(struct ext4_es_tree *tree); extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len, ext4_fsblk_t pblk, - unsigned long long status); + unsigned int status); +extern void ext4_es_cache_extent(struct inode *inode, ext4_lblk_t lblk, + ext4_lblk_t len, ext4_fsblk_t pblk, + unsigned int status); extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len); extern void ext4_es_find_delayed_extent_range(struct inode *inode, @@ -68,36 +81,35 @@ extern void ext4_es_find_delayed_extent_range(struct inode *inode, struct extent_status *es); extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk, struct extent_status *es); -extern int ext4_es_zeroout(struct inode *inode, struct ext4_extent *ex); static inline int ext4_es_is_written(struct extent_status *es) { - return (es->es_pblk & EXTENT_STATUS_WRITTEN) != 0; + return (es->es_pblk & ES_WRITTEN) != 0; } static inline int ext4_es_is_unwritten(struct extent_status *es) { - return (es->es_pblk & EXTENT_STATUS_UNWRITTEN) != 0; + return (es->es_pblk & ES_UNWRITTEN) != 0; } static inline int ext4_es_is_delayed(struct extent_status *es) { - return (es->es_pblk & EXTENT_STATUS_DELAYED) != 0; + return (es->es_pblk & ES_DELAYED) != 0; } static inline int ext4_es_is_hole(struct extent_status *es) { - return (es->es_pblk & EXTENT_STATUS_HOLE) != 0; + return (es->es_pblk & ES_HOLE) != 0; } -static inline ext4_fsblk_t ext4_es_status(struct extent_status *es) +static inline unsigned int ext4_es_status(struct extent_status *es) { - return (es->es_pblk & EXTENT_STATUS_FLAGS); + return es->es_pblk >> ES_SHIFT; } static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es) { - return (es->es_pblk & ~EXTENT_STATUS_FLAGS); + return es->es_pblk & ~ES_MASK; } static inline void ext4_es_store_pblock(struct extent_status *es, @@ -105,19 +117,16 @@ static inline void ext4_es_store_pblock(struct extent_status *es, { ext4_fsblk_t block; - block = (pb & ~EXTENT_STATUS_FLAGS) | - (es->es_pblk & EXTENT_STATUS_FLAGS); + block = (pb & ~ES_MASK) | (es->es_pblk & ES_MASK); es->es_pblk = block; } static inline void ext4_es_store_status(struct extent_status *es, - unsigned long long status) + unsigned int status) { - ext4_fsblk_t block; - - block = (status & EXTENT_STATUS_FLAGS) | - (es->es_pblk & ~EXTENT_STATUS_FLAGS); - es->es_pblk = block; + es->es_pblk = (((ext4_fsblk_t) + (status & EXTENT_STATUS_FLAGS) << ES_SHIFT) | + (es->es_pblk & ~ES_MASK)); } extern void ext4_es_register_shrinker(struct ext4_sb_info *sbi); diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 319c9d26279a..3da21945ff1f 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -149,7 +149,7 @@ ext4_file_dio_write(struct kiocb *iocb, const struct iovec *iov, ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos); mutex_unlock(&inode->i_mutex); - if (ret > 0 || ret == -EIOCBQUEUED) { + if (ret > 0) { ssize_t err; err = generic_write_sync(file, pos, ret); diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 8bf5999875ee..137193ff389b 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -70,18 +70,16 @@ static unsigned ext4_init_inode_bitmap(struct super_block *sb, ext4_group_t block_group, struct ext4_group_desc *gdp) { + struct ext4_group_info *grp; J_ASSERT_BH(bh, buffer_locked(bh)); /* If checksum is bad mark all blocks and inodes use to prevent * allocation, essentially implementing a per-group read-only flag. */ if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) { ext4_error(sb, "Checksum bad for group %u", block_group); - ext4_free_group_clusters_set(sb, gdp, 0); - ext4_free_inodes_set(sb, gdp, 0); - ext4_itable_unused_set(sb, gdp, 0); - memset(bh->b_data, 0xff, sb->s_blocksize); - ext4_inode_bitmap_csum_set(sb, block_group, gdp, bh, - EXT4_INODES_PER_GROUP(sb) / 8); + grp = ext4_get_group_info(sb, block_group); + set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state); + set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); return 0; } @@ -117,6 +115,7 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group) struct ext4_group_desc *desc; struct buffer_head *bh = NULL; ext4_fsblk_t bitmap_blk; + struct ext4_group_info *grp; desc = ext4_get_group_desc(sb, block_group, NULL); if (!desc) @@ -185,6 +184,8 @@ verify: put_bh(bh); ext4_error(sb, "Corrupt inode bitmap - block_group = %u, " "inode_bitmap = %llu", block_group, bitmap_blk); + grp = ext4_get_group_info(sb, block_group); + set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); return NULL; } ext4_unlock_group(sb, block_group); @@ -221,6 +222,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode) struct ext4_super_block *es; struct ext4_sb_info *sbi; int fatal = 0, err, count, cleared; + struct ext4_group_info *grp; if (!sb) { printk(KERN_ERR "EXT4-fs: %s:%d: inode on " @@ -266,7 +268,9 @@ void ext4_free_inode(handle_t *handle, struct inode *inode) block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb); bitmap_bh = ext4_read_inode_bitmap(sb, block_group); - if (!bitmap_bh) + /* Don't bother if the inode bitmap is corrupt. */ + grp = ext4_get_group_info(sb, block_group); + if (unlikely(EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) || !bitmap_bh) goto error_return; BUFFER_TRACE(bitmap_bh, "get_write_access"); @@ -315,8 +319,10 @@ out: err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh); if (!fatal) fatal = err; - } else + } else { ext4_error(sb, "bit already cleared for inode %lu", ino); + set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state); + } error_return: brelse(bitmap_bh); @@ -625,6 +631,51 @@ static int find_group_other(struct super_block *sb, struct inode *parent, } /* + * In no journal mode, if an inode has recently been deleted, we want + * to avoid reusing it until we're reasonably sure the inode table + * block has been written back to disk. (Yes, these values are + * somewhat arbitrary...) + */ +#define RECENTCY_MIN 5 +#define RECENTCY_DIRTY 30 + +static int recently_deleted(struct super_block *sb, ext4_group_t group, int ino) +{ + struct ext4_group_desc *gdp; + struct ext4_inode *raw_inode; + struct buffer_head *bh; + unsigned long dtime, now; + int inodes_per_block = EXT4_SB(sb)->s_inodes_per_block; + int offset, ret = 0, recentcy = RECENTCY_MIN; + + gdp = ext4_get_group_desc(sb, group, NULL); + if (unlikely(!gdp)) + return 0; + + bh = sb_getblk(sb, ext4_inode_table(sb, gdp) + + (ino / inodes_per_block)); + if (unlikely(!bh) || !buffer_uptodate(bh)) + /* + * If the block is not in the buffer cache, then it + * must have been written out. + */ + goto out; + + offset = (ino % inodes_per_block) * EXT4_INODE_SIZE(sb); + raw_inode = (struct ext4_inode *) (bh->b_data + offset); + dtime = le32_to_cpu(raw_inode->i_dtime); + now = get_seconds(); + if (buffer_dirty(bh)) + recentcy += RECENTCY_DIRTY; + + if (dtime && (dtime < now) && (now < dtime + recentcy)) + ret = 1; +out: + brelse(bh); + return ret; +} + +/* * There are two policies for allocating an inode. If the new inode is * a directory, then a forward search is made for a block group with both * free space and a low directory-to-inode ratio; if that fails, then of @@ -652,6 +703,7 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, struct inode *ret; ext4_group_t i; ext4_group_t flex_group; + struct ext4_group_info *grp; /* Cannot create files in a deleted directory */ if (!dir || !dir->i_nlink) @@ -725,10 +777,22 @@ got_group: continue; } + grp = ext4_get_group_info(sb, group); + /* Skip groups with already-known suspicious inode tables */ + if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { + if (++group == ngroups) + group = 0; + continue; + } + brelse(inode_bitmap_bh); inode_bitmap_bh = ext4_read_inode_bitmap(sb, group); - if (!inode_bitmap_bh) - goto out; + /* Skip groups with suspicious inode tables */ + if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp) || !inode_bitmap_bh) { + if (++group == ngroups) + group = 0; + continue; + } repeat_in_this_group: ino = ext4_find_next_zero_bit((unsigned long *) @@ -741,6 +805,11 @@ repeat_in_this_group: "inode=%lu", ino + 1); continue; } + if ((EXT4_SB(sb)->s_journal == NULL) && + recently_deleted(sb, group, ino)) { + ino++; + goto next_inode; + } if (!handle) { BUG_ON(nblocks <= 0); handle = __ext4_journal_start_sb(dir->i_sb, line_no, @@ -764,6 +833,7 @@ repeat_in_this_group: ino++; /* the inode bitmap is zero-based */ if (!ret2) goto got; /* we grabbed the inode! */ +next_inode: if (ino < EXT4_INODES_PER_GROUP(sb)) goto repeat_in_this_group; next_group: diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index 87b30cd357e7..594009f5f523 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -23,7 +23,6 @@ #include <linux/aio.h> #include "ext4_jbd2.h" #include "truncate.h" -#include "ext4_extents.h" /* Needed for EXT_MAX_BLOCKS */ #include <trace/events/ext4.h> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c2ca04e67a4f..c79fd7dabe79 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -553,7 +553,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, } if (retval > 0) { int ret; - unsigned long long status; + unsigned int status; if (unlikely(retval != map->m_len)) { ext4_warning(inode->i_sb, @@ -653,7 +653,7 @@ found: if (retval > 0) { int ret; - unsigned long long status; + unsigned int status; if (unlikely(retval != map->m_len)) { ext4_warning(inode->i_sb, @@ -727,8 +727,12 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock, ret = ext4_map_blocks(handle, inode, &map, flags); if (ret > 0) { + ext4_io_end_t *io_end = ext4_inode_aio(inode); + map_bh(bh, inode->i_sb, map.m_pblk); bh->b_state = (bh->b_state & ~EXT4_MAP_FLAGS) | map.m_flags; + if (io_end && io_end->flag & EXT4_IO_END_UNWRITTEN) + set_buffer_defer_completion(bh); bh->b_size = inode->i_sb->s_blocksize * map.m_len; ret = 0; } @@ -969,7 +973,8 @@ retry_journal: ext4_journal_stop(handle); goto retry_grab; } - wait_on_page_writeback(page); + /* In case writeback began while the page was unlocked */ + wait_for_stable_page(page); if (ext4_should_dioread_nolock(inode)) ret = __block_write_begin(page, pos, len, ext4_get_block_write); @@ -1633,7 +1638,7 @@ add_delayed: set_buffer_delay(bh); } else if (retval > 0) { int ret; - unsigned long long status; + unsigned int status; if (unlikely(retval != map->m_len)) { ext4_warning(inode->i_sb, @@ -1890,12 +1895,32 @@ static int ext4_writepage(struct page *page, return ret; } +static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page) +{ + int len; + loff_t size = i_size_read(mpd->inode); + int err; + + BUG_ON(page->index != mpd->first_page); + if (page->index == size >> PAGE_CACHE_SHIFT) + len = size & ~PAGE_CACHE_MASK; + else + len = PAGE_CACHE_SIZE; + clear_page_dirty_for_io(page); + err = ext4_bio_write_page(&mpd->io_submit, page, len, mpd->wbc); + if (!err) + mpd->wbc->nr_to_write--; + mpd->first_page++; + + return err; +} + #define BH_FLAGS ((1 << BH_Unwritten) | (1 << BH_Delay)) /* * mballoc gives us at most this number of blocks... * XXX: That seems to be only a limitation of ext4_mb_normalize_request(). - * The rest of mballoc seems to handle chunks upto full group size. + * The rest of mballoc seems to handle chunks up to full group size. */ #define MAX_WRITEPAGES_EXTENT_LEN 2048 @@ -1904,82 +1929,94 @@ static int ext4_writepage(struct page *page, * * @mpd - extent of blocks * @lblk - logical number of the block in the file - * @b_state - b_state of the buffer head added + * @bh - buffer head we want to add to the extent * - * the function is used to collect contig. blocks in same state + * The function is used to collect contig. blocks in the same state. If the + * buffer doesn't require mapping for writeback and we haven't started the + * extent of buffers to map yet, the function returns 'true' immediately - the + * caller can write the buffer right away. Otherwise the function returns true + * if the block has been added to the extent, false if the block couldn't be + * added. */ -static int mpage_add_bh_to_extent(struct mpage_da_data *mpd, ext4_lblk_t lblk, - unsigned long b_state) +static bool mpage_add_bh_to_extent(struct mpage_da_data *mpd, ext4_lblk_t lblk, + struct buffer_head *bh) { struct ext4_map_blocks *map = &mpd->map; - /* Don't go larger than mballoc is willing to allocate */ - if (map->m_len >= MAX_WRITEPAGES_EXTENT_LEN) - return 0; + /* Buffer that doesn't need mapping for writeback? */ + if (!buffer_dirty(bh) || !buffer_mapped(bh) || + (!buffer_delay(bh) && !buffer_unwritten(bh))) { + /* So far no extent to map => we write the buffer right away */ + if (map->m_len == 0) + return true; + return false; + } /* First block in the extent? */ if (map->m_len == 0) { map->m_lblk = lblk; map->m_len = 1; - map->m_flags = b_state & BH_FLAGS; - return 1; + map->m_flags = bh->b_state & BH_FLAGS; + return true; } + /* Don't go larger than mballoc is willing to allocate */ + if (map->m_len >= MAX_WRITEPAGES_EXTENT_LEN) + return false; + /* Can we merge the block to our big extent? */ if (lblk == map->m_lblk + map->m_len && - (b_state & BH_FLAGS) == map->m_flags) { + (bh->b_state & BH_FLAGS) == map->m_flags) { map->m_len++; - return 1; + return true; } - return 0; + return false; } -static bool add_page_bufs_to_extent(struct mpage_da_data *mpd, - struct buffer_head *head, - struct buffer_head *bh, - ext4_lblk_t lblk) +/* + * mpage_process_page_bufs - submit page buffers for IO or add them to extent + * + * @mpd - extent of blocks for mapping + * @head - the first buffer in the page + * @bh - buffer we should start processing from + * @lblk - logical number of the block in the file corresponding to @bh + * + * Walk through page buffers from @bh upto @head (exclusive) and either submit + * the page for IO if all buffers in this page were mapped and there's no + * accumulated extent of buffers to map or add buffers in the page to the + * extent of buffers to map. The function returns 1 if the caller can continue + * by processing the next page, 0 if it should stop adding buffers to the + * extent to map because we cannot extend it anymore. It can also return value + * < 0 in case of error during IO submission. + */ +static int mpage_process_page_bufs(struct mpage_da_data *mpd, + struct buffer_head *head, + struct buffer_head *bh, + ext4_lblk_t lblk) { struct inode *inode = mpd->inode; + int err; ext4_lblk_t blocks = (i_size_read(inode) + (1 << inode->i_blkbits) - 1) >> inode->i_blkbits; do { BUG_ON(buffer_locked(bh)); - if (!buffer_dirty(bh) || !buffer_mapped(bh) || - (!buffer_delay(bh) && !buffer_unwritten(bh)) || - lblk >= blocks) { + if (lblk >= blocks || !mpage_add_bh_to_extent(mpd, lblk, bh)) { /* Found extent to map? */ if (mpd->map.m_len) - return false; - if (lblk >= blocks) - return true; - continue; + return 0; + /* Everything mapped so far and we hit EOF */ + break; } - if (!mpage_add_bh_to_extent(mpd, lblk, bh->b_state)) - return false; } while (lblk++, (bh = bh->b_this_page) != head); - return true; -} - -static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page) -{ - int len; - loff_t size = i_size_read(mpd->inode); - int err; - - BUG_ON(page->index != mpd->first_page); - if (page->index == size >> PAGE_CACHE_SHIFT) - len = size & ~PAGE_CACHE_MASK; - else - len = PAGE_CACHE_SIZE; - clear_page_dirty_for_io(page); - err = ext4_bio_write_page(&mpd->io_submit, page, len, mpd->wbc); - if (!err) - mpd->wbc->nr_to_write--; - mpd->first_page++; - - return err; + /* So far everything mapped? Submit the page for IO. */ + if (mpd->map.m_len == 0) { + err = mpage_submit_page(mpd, head->b_page); + if (err < 0) + return err; + } + return lblk < blocks; } /* @@ -2003,8 +2040,6 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd) struct inode *inode = mpd->inode; struct buffer_head *head, *bh; int bpp_bits = PAGE_CACHE_SHIFT - inode->i_blkbits; - ext4_lblk_t blocks = (i_size_read(inode) + (1 << inode->i_blkbits) - 1) - >> inode->i_blkbits; pgoff_t start, end; ext4_lblk_t lblk; sector_t pblock; @@ -2026,7 +2061,7 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd) if (page->index > end) break; - /* Upto 'end' pages must be contiguous */ + /* Up to 'end' pages must be contiguous */ BUG_ON(page->index != start); bh = head = page_buffers(page); do { @@ -2039,18 +2074,26 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd) */ mpd->map.m_len = 0; mpd->map.m_flags = 0; - add_page_bufs_to_extent(mpd, head, bh, - lblk); + /* + * FIXME: If dioread_nolock supports + * blocksize < pagesize, we need to make + * sure we add size mapped so far to + * io_end->size as the following call + * can submit the page for IO. + */ + err = mpage_process_page_bufs(mpd, head, + bh, lblk); pagevec_release(&pvec); - return 0; + if (err > 0) + err = 0; + return err; } if (buffer_delay(bh)) { clear_buffer_delay(bh); bh->b_blocknr = pblock++; } clear_buffer_unwritten(bh); - } while (++lblk < blocks && - (bh = bh->b_this_page) != head); + } while (lblk++, (bh = bh->b_this_page) != head); /* * FIXME: This is going to break if dioread_nolock @@ -2199,12 +2242,10 @@ static int mpage_map_and_submit_extent(handle_t *handle, /* Update on-disk size after IO is submitted */ disksize = ((loff_t)mpd->first_page) << PAGE_CACHE_SHIFT; - if (disksize > i_size_read(inode)) - disksize = i_size_read(inode); if (disksize > EXT4_I(inode)->i_disksize) { int err2; - ext4_update_i_disksize(inode, disksize); + ext4_wb_update_i_disksize(inode, disksize); err2 = ext4_mark_inode_dirty(handle, inode); if (err2) ext4_error(inode->i_sb, @@ -2219,7 +2260,7 @@ static int mpage_map_and_submit_extent(handle_t *handle, /* * Calculate the total number of credits to reserve for one writepages * iteration. This is called from ext4_writepages(). We map an extent of - * upto MAX_WRITEPAGES_EXTENT_LEN blocks and then we go on and finish mapping + * up to MAX_WRITEPAGES_EXTENT_LEN blocks and then we go on and finish mapping * the last partial page. So in total we can map MAX_WRITEPAGES_EXTENT_LEN + * bpp - 1 blocks in bpp different extents. */ @@ -2319,14 +2360,10 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd) lblk = ((ext4_lblk_t)page->index) << (PAGE_CACHE_SHIFT - blkbits); head = page_buffers(page); - if (!add_page_bufs_to_extent(mpd, head, head, lblk)) + err = mpage_process_page_bufs(mpd, head, head, lblk); + if (err <= 0) goto out; - /* So far everything mapped? Submit the page for IO. */ - if (mpd->map.m_len == 0) { - err = mpage_submit_page(mpd, page); - if (err < 0) - goto out; - } + err = 0; /* * Accumulated enough dirty pages? This doesn't apply @@ -2410,7 +2447,7 @@ static int ext4_writepages(struct address_space *mapping, if (ext4_should_dioread_nolock(inode)) { /* - * We may need to convert upto one extent per block in + * We may need to convert up to one extent per block in * the page and we may dirty the inode. */ rsv_blocks = 1 + (PAGE_CACHE_SIZE >> inode->i_blkbits); @@ -2646,7 +2683,7 @@ retry_journal: goto retry_grab; } /* In case writeback began while the page was unlocked */ - wait_on_page_writeback(page); + wait_for_stable_page(page); ret = __block_write_begin(page, pos, len, ext4_da_get_block_prep); if (ret < 0) { @@ -2991,19 +3028,13 @@ static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock, } static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, - ssize_t size, void *private, int ret, - bool is_async) + ssize_t size, void *private) { - struct inode *inode = file_inode(iocb->ki_filp); ext4_io_end_t *io_end = iocb->private; /* if not async direct IO just return */ - if (!io_end) { - inode_dio_done(inode); - if (is_async) - aio_complete(iocb, ret, 0); + if (!io_end) return; - } ext_debug("ext4_end_io_dio(): io_end 0x%p " "for inode %lu, iocb 0x%p, offset %llu, size %zd\n", @@ -3013,11 +3044,7 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, iocb->private = NULL; io_end->offset = offset; io_end->size = size; - if (is_async) { - io_end->iocb = iocb; - io_end->result = ret; - } - ext4_put_io_end_defer(io_end); + ext4_put_io_end(io_end); } /* @@ -3102,7 +3129,6 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb, ret = -ENOMEM; goto retake_lock; } - io_end->flag |= EXT4_IO_END_DIRECT; /* * Grab reference for DIO. Will be dropped in ext4_end_io_dio() */ @@ -3147,13 +3173,6 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb, if (ret <= 0 && ret != -EIOCBQUEUED && iocb->private) { WARN_ON(iocb->private != io_end); WARN_ON(io_end->flag & EXT4_IO_END_UNWRITTEN); - WARN_ON(io_end->iocb); - /* - * Generic code already did inode_dio_done() so we - * have to clear EXT4_IO_END_DIRECT to not do it for - * the second time. - */ - io_end->flag = 0; ext4_put_io_end(io_end); iocb->private = NULL; } @@ -4566,7 +4585,9 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) ext4_journal_stop(handle); } - if (attr->ia_valid & ATTR_SIZE) { + if (attr->ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { + handle_t *handle; + loff_t oldsize = inode->i_size; if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) { struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); @@ -4574,73 +4595,69 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) if (attr->ia_size > sbi->s_bitmap_maxbytes) return -EFBIG; } - } - - if (S_ISREG(inode->i_mode) && - attr->ia_valid & ATTR_SIZE && - (attr->ia_size < inode->i_size)) { - handle_t *handle; - - handle = ext4_journal_start(inode, EXT4_HT_INODE, 3); - if (IS_ERR(handle)) { - error = PTR_ERR(handle); - goto err_out; - } - if (ext4_handle_valid(handle)) { - error = ext4_orphan_add(handle, inode); - orphan = 1; - } - EXT4_I(inode)->i_disksize = attr->ia_size; - rc = ext4_mark_inode_dirty(handle, inode); - if (!error) - error = rc; - ext4_journal_stop(handle); - - if (ext4_should_order_data(inode)) { - error = ext4_begin_ordered_truncate(inode, + if (S_ISREG(inode->i_mode) && + (attr->ia_size < inode->i_size)) { + if (ext4_should_order_data(inode)) { + error = ext4_begin_ordered_truncate(inode, attr->ia_size); - if (error) { - /* Do as much error cleanup as possible */ - handle = ext4_journal_start(inode, - EXT4_HT_INODE, 3); - if (IS_ERR(handle)) { - ext4_orphan_del(NULL, inode); + if (error) goto err_out; - } - ext4_orphan_del(handle, inode); - orphan = 0; - ext4_journal_stop(handle); + } + handle = ext4_journal_start(inode, EXT4_HT_INODE, 3); + if (IS_ERR(handle)) { + error = PTR_ERR(handle); goto err_out; } - } - } - - if (attr->ia_valid & ATTR_SIZE) { - if (attr->ia_size != inode->i_size) { - loff_t oldsize = inode->i_size; - - i_size_write(inode, attr->ia_size); - /* - * Blocks are going to be removed from the inode. Wait - * for dio in flight. Temporarily disable - * dioread_nolock to prevent livelock. - */ - if (orphan) { - if (!ext4_should_journal_data(inode)) { - ext4_inode_block_unlocked_dio(inode); - inode_dio_wait(inode); - ext4_inode_resume_unlocked_dio(inode); - } else - ext4_wait_for_tail_page_commit(inode); + if (ext4_handle_valid(handle)) { + error = ext4_orphan_add(handle, inode); + orphan = 1; } + down_write(&EXT4_I(inode)->i_data_sem); + EXT4_I(inode)->i_disksize = attr->ia_size; + rc = ext4_mark_inode_dirty(handle, inode); + if (!error) + error = rc; /* - * Truncate pagecache after we've waited for commit - * in data=journal mode to make pages freeable. + * We have to update i_size under i_data_sem together + * with i_disksize to avoid races with writeback code + * running ext4_wb_update_i_disksize(). */ - truncate_pagecache(inode, oldsize, inode->i_size); + if (!error) + i_size_write(inode, attr->ia_size); + up_write(&EXT4_I(inode)->i_data_sem); + ext4_journal_stop(handle); + if (error) { + ext4_orphan_del(NULL, inode); + goto err_out; + } + } else + i_size_write(inode, attr->ia_size); + + /* + * Blocks are going to be removed from the inode. Wait + * for dio in flight. Temporarily disable + * dioread_nolock to prevent livelock. + */ + if (orphan) { + if (!ext4_should_journal_data(inode)) { + ext4_inode_block_unlocked_dio(inode); + inode_dio_wait(inode); + ext4_inode_resume_unlocked_dio(inode); + } else + ext4_wait_for_tail_page_commit(inode); } - ext4_truncate(inode); + /* + * Truncate pagecache after we've waited for commit + * in data=journal mode to make pages freeable. + */ + truncate_pagecache(inode, oldsize, inode->i_size); } + /* + * We want to call ext4_truncate() even if attr->ia_size == + * inode->i_size for cases like truncation of fallocated space + */ + if (attr->ia_valid & ATTR_SIZE) + ext4_truncate(inode); if (!rc) { setattr_copy(inode, attr); diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index c0427e2f6648..a569d335f804 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -17,7 +17,6 @@ #include <asm/uaccess.h> #include "ext4_jbd2.h" #include "ext4.h" -#include "ext4_extents.h" #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) @@ -624,6 +623,8 @@ resizefs_out: return 0; } + case EXT4_IOC_PRECACHE_EXTENTS: + return ext4_ext_precache(inode); default: return -ENOTTY; @@ -688,6 +689,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case EXT4_IOC_MOVE_EXT: case FITRIM: case EXT4_IOC_RESIZE_FS: + case EXT4_IOC_PRECACHE_EXTENTS: break; default: return -ENOIOCTLCMD; diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 4bbbf13bd743..a41e3ba8cfaa 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -751,13 +751,15 @@ void ext4_mb_generate_buddy(struct super_block *sb, if (free != grp->bb_free) { ext4_grp_locked_error(sb, group, 0, 0, - "%u clusters in bitmap, %u in gd", + "%u clusters in bitmap, %u in gd; " + "block bitmap corrupt.", free, grp->bb_free); /* - * If we intent to continue, we consider group descritor + * If we intend to continue, we consider group descriptor * corrupt and update bb_free using bitmap value */ grp->bb_free = free; + set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state); } mb_set_largest_free_order(sb, grp); @@ -1398,6 +1400,10 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b, BUG_ON(last >= (sb->s_blocksize << 3)); assert_spin_locked(ext4_group_lock_ptr(sb, e4b->bd_group)); + /* Don't bother if the block group is corrupt. */ + if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info))) + return; + mb_check_buddy(e4b); mb_free_blocks_double(inode, e4b, first, count); @@ -1423,7 +1429,11 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b, inode ? inode->i_ino : 0, blocknr, "freeing already freed block " - "(bit %u)", block); + "(bit %u); block bitmap corrupt.", + block); + /* Mark the block group as corrupt. */ + set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, + &e4b->bd_info->bb_state); mb_regenerate_buddy(e4b); goto done; } @@ -1790,6 +1800,11 @@ int ext4_mb_find_by_goal(struct ext4_allocation_context *ac, if (err) return err; + if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info))) { + ext4_mb_unload_buddy(e4b); + return 0; + } + ext4_lock_group(ac->ac_sb, group); max = mb_find_extent(e4b, ac->ac_g_ex.fe_start, ac->ac_g_ex.fe_len, &ex); @@ -1987,6 +2002,9 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac, if (cr <= 2 && free < ac->ac_g_ex.fe_len) return 0; + if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(grp))) + return 0; + /* We only do this if the grp has never been initialized */ if (unlikely(EXT4_MB_GRP_NEED_INIT(grp))) { int ret = ext4_mb_init_group(ac->ac_sb, group); @@ -4585,6 +4603,7 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode, struct buffer_head *gd_bh; ext4_group_t block_group; struct ext4_sb_info *sbi; + struct ext4_inode_info *ei = EXT4_I(inode); struct ext4_buddy e4b; unsigned int count_clusters; int err = 0; @@ -4673,6 +4692,10 @@ do_more: overflow = 0; ext4_get_group_no_and_offset(sb, block, &block_group, &bit); + if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT( + ext4_get_group_info(sb, block_group)))) + return; + /* * Check to see if we are freeing blocks across a group * boundary. @@ -4784,7 +4807,6 @@ do_more: ext4_block_bitmap_csum_set(sb, block_group, gdp, bitmap_bh); ext4_group_desc_csum_set(sb, block_group, gdp); ext4_unlock_group(sb, block_group); - percpu_counter_add(&sbi->s_freeclusters_counter, count_clusters); if (sbi->s_log_groups_per_flex) { ext4_group_t flex_group = ext4_flex_group(sbi, block_group); @@ -4792,10 +4814,23 @@ do_more: &sbi->s_flex_groups[flex_group].free_clusters); } - ext4_mb_unload_buddy(&e4b); - - if (!(flags & EXT4_FREE_BLOCKS_NO_QUOT_UPDATE)) + if (flags & EXT4_FREE_BLOCKS_RESERVE && ei->i_reserved_data_blocks) { + percpu_counter_add(&sbi->s_dirtyclusters_counter, + count_clusters); + spin_lock(&ei->i_block_reservation_lock); + if (flags & EXT4_FREE_BLOCKS_METADATA) + ei->i_reserved_meta_blocks += count_clusters; + else + ei->i_reserved_data_blocks += count_clusters; + spin_unlock(&ei->i_block_reservation_lock); + if (!(flags & EXT4_FREE_BLOCKS_NO_QUOT_UPDATE)) + dquot_reclaim_block(inode, + EXT4_C2B(sbi, count_clusters)); + } else if (!(flags & EXT4_FREE_BLOCKS_NO_QUOT_UPDATE)) dquot_free_block(inode, EXT4_C2B(sbi, count_clusters)); + percpu_counter_add(&sbi->s_freeclusters_counter, count_clusters); + + ext4_mb_unload_buddy(&e4b); /* We dirtied the bitmap block */ BUFFER_TRACE(bitmap_bh, "dirtied bitmap block"); diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c index 49e8bdff9163..2ae73a80c19b 100644 --- a/fs/ext4/migrate.c +++ b/fs/ext4/migrate.c @@ -39,7 +39,7 @@ static int finish_range(handle_t *handle, struct inode *inode, newext.ee_block = cpu_to_le32(lb->first_block); newext.ee_len = cpu_to_le16(lb->last_block - lb->first_block + 1); ext4_ext_store_pblock(&newext, lb->first_pblock); - path = ext4_ext_find_extent(inode, lb->first_block, NULL); + path = ext4_ext_find_extent(inode, lb->first_block, NULL, 0); if (IS_ERR(path)) { retval = PTR_ERR(path); @@ -494,7 +494,7 @@ int ext4_ext_migrate(struct inode *inode) * superblock modification. * * For the tmp_inode we already have committed the - * trascation that created the inode. Later as and + * transaction that created the inode. Later as and * when we add extents we extent the journal */ /* diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index e86dddbd8296..7fa4d855dbd5 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -37,7 +37,7 @@ get_ext_path(struct inode *inode, ext4_lblk_t lblock, int ret = 0; struct ext4_ext_path *path; - path = ext4_ext_find_extent(inode, lblock, *orig_path); + path = ext4_ext_find_extent(inode, lblock, *orig_path, EXT4_EX_NOCACHE); if (IS_ERR(path)) ret = PTR_ERR(path); else if (path[ext_depth(inode)].p_ext == NULL) diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 35f55a0dbc4b..1bec5a5c1e45 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -3005,15 +3005,19 @@ static struct buffer_head *ext4_get_first_dir_block(handle_t *handle, /* * Anybody can rename anything with this: the permission checks are left to the * higher-level routines. + * + * n.b. old_{dentry,inode) refers to the source dentry/inode + * while new_{dentry,inode) refers to the destination dentry/inode + * This comes from rename(const char *oldpath, const char *newpath) */ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry) { - handle_t *handle; + handle_t *handle = NULL; struct inode *old_inode, *new_inode; struct buffer_head *old_bh, *new_bh, *dir_bh; struct ext4_dir_entry_2 *old_de, *new_de; - int retval, force_da_alloc = 0; + int retval; int inlined = 0, new_inlined = 0; struct ext4_dir_entry_2 *parent_de; @@ -3026,14 +3030,6 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, * in separate transaction */ if (new_dentry->d_inode) dquot_initialize(new_dentry->d_inode); - handle = ext4_journal_start(old_dir, EXT4_HT_DIR, - (2 * EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) + - EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2)); - if (IS_ERR(handle)) - return PTR_ERR(handle); - - if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) - ext4_handle_sync(handle); old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de, NULL); /* @@ -3056,6 +3052,18 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, new_bh = NULL; } } + if (new_inode && !test_opt(new_dir->i_sb, NO_AUTO_DA_ALLOC)) + ext4_alloc_da_blocks(old_inode); + + handle = ext4_journal_start(old_dir, EXT4_HT_DIR, + (2 * EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) + + EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2)); + if (IS_ERR(handle)) + return PTR_ERR(handle); + + if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) + ext4_handle_sync(handle); + if (S_ISDIR(old_inode->i_mode)) { if (new_inode) { retval = -ENOTEMPTY; @@ -3186,8 +3194,6 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, ext4_mark_inode_dirty(handle, new_inode); if (!new_inode->i_nlink) ext4_orphan_add(handle, new_inode); - if (!test_opt(new_dir->i_sb, NO_AUTO_DA_ALLOC)) - force_da_alloc = 1; } retval = 0; @@ -3195,9 +3201,8 @@ end_rename: brelse(dir_bh); brelse(old_bh); brelse(new_bh); - ext4_journal_stop(handle); - if (retval == 0 && force_da_alloc) - ext4_alloc_da_blocks(old_inode); + if (handle) + ext4_journal_stop(handle); return retval; } diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 6625d210fb45..d7d0c7b46ed4 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -123,10 +123,6 @@ static void ext4_release_io_end(ext4_io_end_t *io_end) ext4_finish_bio(bio); bio_put(bio); } - if (io_end->flag & EXT4_IO_END_DIRECT) - inode_dio_done(io_end->inode); - if (io_end->iocb) - aio_complete(io_end->iocb, io_end->result, 0); kmem_cache_free(io_end_cachep, io_end); } @@ -204,19 +200,14 @@ static void ext4_add_complete_io(ext4_io_end_t *io_end) struct workqueue_struct *wq; unsigned long flags; - BUG_ON(!(io_end->flag & EXT4_IO_END_UNWRITTEN)); + /* Only reserved conversions from writeback should enter here */ + WARN_ON(!(io_end->flag & EXT4_IO_END_UNWRITTEN)); + WARN_ON(!io_end->handle); spin_lock_irqsave(&ei->i_completed_io_lock, flags); - if (io_end->handle) { - wq = EXT4_SB(io_end->inode->i_sb)->rsv_conversion_wq; - if (list_empty(&ei->i_rsv_conversion_list)) - queue_work(wq, &ei->i_rsv_conversion_work); - list_add_tail(&io_end->list, &ei->i_rsv_conversion_list); - } else { - wq = EXT4_SB(io_end->inode->i_sb)->unrsv_conversion_wq; - if (list_empty(&ei->i_unrsv_conversion_list)) - queue_work(wq, &ei->i_unrsv_conversion_work); - list_add_tail(&io_end->list, &ei->i_unrsv_conversion_list); - } + wq = EXT4_SB(io_end->inode->i_sb)->rsv_conversion_wq; + if (list_empty(&ei->i_rsv_conversion_list)) + queue_work(wq, &ei->i_rsv_conversion_work); + list_add_tail(&io_end->list, &ei->i_rsv_conversion_list); spin_unlock_irqrestore(&ei->i_completed_io_lock, flags); } @@ -256,13 +247,6 @@ void ext4_end_io_rsv_work(struct work_struct *work) ext4_do_flush_completed_IO(&ei->vfs_inode, &ei->i_rsv_conversion_list); } -void ext4_end_io_unrsv_work(struct work_struct *work) -{ - struct ext4_inode_info *ei = container_of(work, struct ext4_inode_info, - i_unrsv_conversion_work); - ext4_do_flush_completed_IO(&ei->vfs_inode, &ei->i_unrsv_conversion_list); -} - ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags) { ext4_io_end_t *io = kmem_cache_zalloc(io_end_cachep, flags); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index b59373b625e9..2c2e6cbc6bed 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -162,7 +162,7 @@ void *ext4_kvmalloc(size_t size, gfp_t flags) { void *ret; - ret = kmalloc(size, flags); + ret = kmalloc(size, flags | __GFP_NOWARN); if (!ret) ret = __vmalloc(size, flags, PAGE_KERNEL); return ret; @@ -172,7 +172,7 @@ void *ext4_kvzalloc(size_t size, gfp_t flags) { void *ret; - ret = kzalloc(size, flags); + ret = kzalloc(size, flags | __GFP_NOWARN); if (!ret) ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); return ret; @@ -762,9 +762,7 @@ static void ext4_put_super(struct super_block *sb) ext4_unregister_li_request(sb); dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); - flush_workqueue(sbi->unrsv_conversion_wq); flush_workqueue(sbi->rsv_conversion_wq); - destroy_workqueue(sbi->unrsv_conversion_wq); destroy_workqueue(sbi->rsv_conversion_wq); if (sbi->s_journal) { @@ -875,14 +873,12 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) #endif ei->jinode = NULL; INIT_LIST_HEAD(&ei->i_rsv_conversion_list); - INIT_LIST_HEAD(&ei->i_unrsv_conversion_list); spin_lock_init(&ei->i_completed_io_lock); ei->i_sync_tid = 0; ei->i_datasync_tid = 0; atomic_set(&ei->i_ioend_count, 0); atomic_set(&ei->i_unwritten, 0); INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); - INIT_WORK(&ei->i_unrsv_conversion_work, ext4_end_io_unrsv_work); return &ei->vfs_inode; } @@ -1134,8 +1130,8 @@ enum { Opt_nouid32, Opt_debug, Opt_removed, Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, - Opt_commit, Opt_min_batch_time, Opt_max_batch_time, - Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, + Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, + Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, Opt_data_err_abort, Opt_data_err_ignore, Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, @@ -1179,6 +1175,7 @@ static const match_table_t tokens = { {Opt_min_batch_time, "min_batch_time=%u"}, {Opt_max_batch_time, "max_batch_time=%u"}, {Opt_journal_dev, "journal_dev=%u"}, + {Opt_journal_path, "journal_path=%s"}, {Opt_journal_checksum, "journal_checksum"}, {Opt_journal_async_commit, "journal_async_commit"}, {Opt_abort, "abort"}, @@ -1338,6 +1335,7 @@ static int clear_qf_name(struct super_block *sb, int qtype) #define MOPT_NO_EXT2 0x0100 #define MOPT_NO_EXT3 0x0200 #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) +#define MOPT_STRING 0x0400 static const struct mount_opts { int token; @@ -1387,6 +1385,7 @@ static const struct mount_opts { {Opt_resuid, 0, MOPT_GTE0}, {Opt_resgid, 0, MOPT_GTE0}, {Opt_journal_dev, 0, MOPT_GTE0}, + {Opt_journal_path, 0, MOPT_STRING}, {Opt_journal_ioprio, 0, MOPT_GTE0}, {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, @@ -1480,7 +1479,7 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, return -1; } - if (args->from && match_int(args, &arg)) + if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) return -1; if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) return -1; @@ -1544,6 +1543,44 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, return -1; } *journal_devnum = arg; + } else if (token == Opt_journal_path) { + char *journal_path; + struct inode *journal_inode; + struct path path; + int error; + + if (is_remount) { + ext4_msg(sb, KERN_ERR, + "Cannot specify journal on remount"); + return -1; + } + journal_path = match_strdup(&args[0]); + if (!journal_path) { + ext4_msg(sb, KERN_ERR, "error: could not dup " + "journal device string"); + return -1; + } + + error = kern_path(journal_path, LOOKUP_FOLLOW, &path); + if (error) { + ext4_msg(sb, KERN_ERR, "error: could not find " + "journal device path: error %d", error); + kfree(journal_path); + return -1; + } + + journal_inode = path.dentry->d_inode; + if (!S_ISBLK(journal_inode->i_mode)) { + ext4_msg(sb, KERN_ERR, "error: journal path %s " + "is not a block device", journal_path); + path_put(&path); + kfree(journal_path); + return -1; + } + + *journal_devnum = new_encode_dev(journal_inode->i_rdev); + path_put(&path); + kfree(journal_path); } else if (token == Opt_journal_ioprio) { if (arg > 7) { ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" @@ -3954,14 +3991,6 @@ no_journal: goto failed_mount4; } - EXT4_SB(sb)->unrsv_conversion_wq = - alloc_workqueue("ext4-unrsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); - if (!EXT4_SB(sb)->unrsv_conversion_wq) { - printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); - ret = -ENOMEM; - goto failed_mount4; - } - /* * The jbd2_journal_load will have done any necessary log recovery, * so we can safely mount the rest of the filesystem now. @@ -4115,8 +4144,6 @@ failed_mount4: ext4_msg(sb, KERN_ERR, "mount failed"); if (EXT4_SB(sb)->rsv_conversion_wq) destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); - if (EXT4_SB(sb)->unrsv_conversion_wq) - destroy_workqueue(EXT4_SB(sb)->unrsv_conversion_wq); failed_mount_wq: if (sbi->s_journal) { jbd2_journal_destroy(sbi->s_journal); @@ -4564,7 +4591,6 @@ static int ext4_sync_fs(struct super_block *sb, int wait) trace_ext4_sync_fs(sb, wait); flush_workqueue(sbi->rsv_conversion_wq); - flush_workqueue(sbi->unrsv_conversion_wq); /* * Writeback quota in non-journalled quota case - journalled quota has * no dirty dquots @@ -4600,7 +4626,6 @@ static int ext4_sync_fs_nojournal(struct super_block *sb, int wait) trace_ext4_sync_fs(sb, wait); flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq); - flush_workqueue(EXT4_SB(sb)->unrsv_conversion_wq); dquot_writeback_dquots(sb, -1); if (wait && test_opt(sb, BARRIER)) ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 66a6b85a51d8..bb312201ca95 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -182,7 +182,7 @@ const struct address_space_operations f2fs_meta_aops = { .set_page_dirty = f2fs_set_meta_page_dirty, }; -int check_orphan_space(struct f2fs_sb_info *sbi) +int acquire_orphan_inode(struct f2fs_sb_info *sbi) { unsigned int max_orphans; int err = 0; @@ -197,10 +197,19 @@ int check_orphan_space(struct f2fs_sb_info *sbi) mutex_lock(&sbi->orphan_inode_mutex); if (sbi->n_orphans >= max_orphans) err = -ENOSPC; + else + sbi->n_orphans++; mutex_unlock(&sbi->orphan_inode_mutex); return err; } +void release_orphan_inode(struct f2fs_sb_info *sbi) +{ + mutex_lock(&sbi->orphan_inode_mutex); + sbi->n_orphans--; + mutex_unlock(&sbi->orphan_inode_mutex); +} + void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) { struct list_head *head, *this; @@ -229,21 +238,18 @@ retry: list_add(&new->list, this->prev); else list_add_tail(&new->list, head); - - sbi->n_orphans++; out: mutex_unlock(&sbi->orphan_inode_mutex); } void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) { - struct list_head *this, *next, *head; + struct list_head *head; struct orphan_inode_entry *orphan; mutex_lock(&sbi->orphan_inode_mutex); head = &sbi->orphan_inode_list; - list_for_each_safe(this, next, head) { - orphan = list_entry(this, struct orphan_inode_entry, list); + list_for_each_entry(orphan, head, list) { if (orphan->ino == ino) { list_del(&orphan->list); kmem_cache_free(orphan_entry_slab, orphan); @@ -373,7 +379,7 @@ static struct page *validate_checkpoint(struct f2fs_sb_info *sbi, if (!f2fs_crc_valid(crc, cp_block, crc_offset)) goto invalid_cp1; - pre_version = le64_to_cpu(cp_block->checkpoint_ver); + pre_version = cur_cp_version(cp_block); /* Read the 2nd cp block in this CP pack */ cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1; @@ -388,7 +394,7 @@ static struct page *validate_checkpoint(struct f2fs_sb_info *sbi, if (!f2fs_crc_valid(crc, cp_block, crc_offset)) goto invalid_cp2; - cur_version = le64_to_cpu(cp_block->checkpoint_ver); + cur_version = cur_cp_version(cp_block); if (cur_version == pre_version) { *version = cur_version; @@ -793,7 +799,7 @@ void write_checkpoint(struct f2fs_sb_info *sbi, bool is_umount) * Increase the version number so that * SIT entries and seg summaries are written at correct place */ - ckpt_ver = le64_to_cpu(ckpt->checkpoint_ver); + ckpt_ver = cur_cp_version(ckpt); ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver); /* write cached NAT/SIT entries to NAT/SIT area */ diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 035f9a345cdf..941f9b9ca3a5 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -37,9 +37,9 @@ static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr) struct page *node_page = dn->node_page; unsigned int ofs_in_node = dn->ofs_in_node; - wait_on_page_writeback(node_page); + f2fs_wait_on_page_writeback(node_page, NODE, false); - rn = (struct f2fs_node *)page_address(node_page); + rn = F2FS_NODE(node_page); /* Get physical address of data block */ addr_array = blkaddr_in_node(rn); @@ -117,7 +117,8 @@ void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) block_t start_blkaddr, end_blkaddr; BUG_ON(blk_addr == NEW_ADDR); - fofs = start_bidx_of_node(ofs_of_node(dn->node_page)) + dn->ofs_in_node; + fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + + dn->ofs_in_node; /* Update the page address in the parent node */ __set_data_blkaddr(dn, blk_addr); @@ -176,7 +177,6 @@ void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) end_update: write_unlock(&fi->ext.ext_lock); sync_inode_page(dn); - return; } struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) @@ -260,8 +260,17 @@ repeat: if (PageUptodate(page)) return page; - BUG_ON(dn.data_blkaddr == NEW_ADDR); - BUG_ON(dn.data_blkaddr == NULL_ADDR); + /* + * A new dentry page is allocated but not able to be written, since its + * new inode page couldn't be allocated due to -ENOSPC. + * In such the case, its blkaddr can be remained as NEW_ADDR. + * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. + */ + if (dn.data_blkaddr == NEW_ADDR) { + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + SetPageUptodate(page); + return page; + } err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC); if (err) @@ -365,7 +374,6 @@ static void read_end_io(struct bio *bio, int err) } unlock_page(page); } while (bvec >= bio->bi_io_vec); - kfree(bio->bi_private); bio_put(bio); } @@ -391,7 +399,6 @@ int f2fs_readpage(struct f2fs_sb_info *sbi, struct page *page, bio->bi_end_io = read_end_io; if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { - kfree(bio->bi_private); bio_put(bio); up_read(&sbi->bio_sem); f2fs_put_page(page, 1); @@ -442,7 +449,7 @@ static int get_data_block_ro(struct inode *inode, sector_t iblock, unsigned int end_offset; end_offset = IS_INODE(dn.node_page) ? - ADDRS_PER_INODE : + ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK; clear_buffer_new(bh_result); @@ -636,9 +643,6 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping, int err = 0; int ilock; - /* for nobh_write_end */ - *fsdata = NULL; - f2fs_balance_fs(sbi); repeat: page = grab_cache_page_write_begin(mapping, index, flags); diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c index 0d6c6aafb235..a84b0a8e6854 100644 --- a/fs/f2fs/debug.c +++ b/fs/f2fs/debug.c @@ -29,7 +29,7 @@ static DEFINE_MUTEX(f2fs_stat_mutex); static void update_general_status(struct f2fs_sb_info *sbi) { - struct f2fs_stat_info *si = sbi->stat_info; + struct f2fs_stat_info *si = F2FS_STAT(sbi); int i; /* valid check of the segment numbers */ @@ -83,7 +83,7 @@ static void update_general_status(struct f2fs_sb_info *sbi) */ static void update_sit_info(struct f2fs_sb_info *sbi) { - struct f2fs_stat_info *si = sbi->stat_info; + struct f2fs_stat_info *si = F2FS_STAT(sbi); unsigned int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist; struct sit_info *sit_i = SIT_I(sbi); unsigned int segno, vblocks; @@ -118,7 +118,7 @@ static void update_sit_info(struct f2fs_sb_info *sbi) */ static void update_mem_info(struct f2fs_sb_info *sbi) { - struct f2fs_stat_info *si = sbi->stat_info; + struct f2fs_stat_info *si = F2FS_STAT(sbi); unsigned npages; if (si->base_mem) @@ -253,21 +253,21 @@ static int stat_show(struct seq_file *s, void *v) si->nats, NM_WOUT_THRESHOLD); seq_printf(s, " - SITs: %5d\n - free_nids: %5d\n", si->sits, si->fnids); - seq_printf(s, "\nDistribution of User Blocks:"); - seq_printf(s, " [ valid | invalid | free ]\n"); - seq_printf(s, " ["); + seq_puts(s, "\nDistribution of User Blocks:"); + seq_puts(s, " [ valid | invalid | free ]\n"); + seq_puts(s, " ["); for (j = 0; j < si->util_valid; j++) - seq_printf(s, "-"); - seq_printf(s, "|"); + seq_putc(s, '-'); + seq_putc(s, '|'); for (j = 0; j < si->util_invalid; j++) - seq_printf(s, "-"); - seq_printf(s, "|"); + seq_putc(s, '-'); + seq_putc(s, '|'); for (j = 0; j < si->util_free; j++) - seq_printf(s, "-"); - seq_printf(s, "]\n\n"); + seq_putc(s, '-'); + seq_puts(s, "]\n\n"); seq_printf(s, "SSR: %u blocks in %u segments\n", si->block_count[SSR], si->segment_count[SSR]); seq_printf(s, "LFS: %u blocks in %u segments\n", @@ -305,11 +305,10 @@ int f2fs_build_stats(struct f2fs_sb_info *sbi) struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); struct f2fs_stat_info *si; - sbi->stat_info = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL); - if (!sbi->stat_info) + si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL); + if (!si) return -ENOMEM; - si = sbi->stat_info; si->all_area_segs = le32_to_cpu(raw_super->segment_count); si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); @@ -319,6 +318,7 @@ int f2fs_build_stats(struct f2fs_sb_info *sbi) si->main_area_zones = si->main_area_sections / le32_to_cpu(raw_super->secs_per_zone); si->sbi = sbi; + sbi->stat_info = si; mutex_lock(&f2fs_stat_mutex); list_add_tail(&si->stat_list, &f2fs_stat_list); @@ -329,13 +329,13 @@ int f2fs_build_stats(struct f2fs_sb_info *sbi) void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { - struct f2fs_stat_info *si = sbi->stat_info; + struct f2fs_stat_info *si = F2FS_STAT(sbi); mutex_lock(&f2fs_stat_mutex); list_del(&si->stat_list); mutex_unlock(&f2fs_stat_mutex); - kfree(sbi->stat_info); + kfree(si); } void __init f2fs_create_root_stats(void) diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index 62f0d5977c64..384c6daf9a89 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -270,12 +270,27 @@ static void init_dent_inode(const struct qstr *name, struct page *ipage) struct f2fs_node *rn; /* copy name info. to this inode page */ - rn = (struct f2fs_node *)page_address(ipage); + rn = F2FS_NODE(ipage); rn->i.i_namelen = cpu_to_le32(name->len); memcpy(rn->i.i_name, name->name, name->len); set_page_dirty(ipage); } +int update_dent_inode(struct inode *inode, const struct qstr *name) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct page *page; + + page = get_node_page(sbi, inode->i_ino); + if (IS_ERR(page)) + return PTR_ERR(page); + + init_dent_inode(name, page); + f2fs_put_page(page, 1); + + return 0; +} + static int make_empty_dir(struct inode *inode, struct inode *parent, struct page *page) { @@ -557,6 +572,8 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page, if (inode->i_nlink == 0) add_orphan_inode(sbi, inode->i_ino); + else + release_orphan_inode(sbi); } if (bit_pos == NR_DENTRY_IN_BLOCK) { diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 467d42d65c48..608f0df5b919 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -17,6 +17,7 @@ #include <linux/slab.h> #include <linux/crc32.h> #include <linux/magic.h> +#include <linux/kobject.h> /* * For mount options @@ -28,6 +29,7 @@ #define F2FS_MOUNT_XATTR_USER 0x00000010 #define F2FS_MOUNT_POSIX_ACL 0x00000020 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040 +#define F2FS_MOUNT_INLINE_XATTR 0x00000080 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) @@ -134,11 +136,13 @@ static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) /* * For INODE and NODE manager */ -#define XATTR_NODE_OFFSET (-1) /* - * store xattrs to one node block per - * file keeping -1 as its node offset to - * distinguish from index node blocks. - */ +/* + * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1 + * as its node offset to distinguish from index node blocks. + * But some bits are used to mark the node block. + */ +#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \ + >> OFFSET_BIT_SHIFT) enum { ALLOC_NODE, /* allocate a new node page if needed */ LOOKUP_NODE, /* look up a node without readahead */ @@ -178,6 +182,7 @@ struct f2fs_inode_info { f2fs_hash_t chash; /* hash value of given file name */ unsigned int clevel; /* maximum level of given file name */ nid_t i_xattr_nid; /* node id that contains xattrs */ + unsigned long long xattr_ver; /* cp version of xattr modification */ struct extent_info ext; /* in-memory extent cache entry */ }; @@ -296,15 +301,6 @@ struct f2fs_sm_info { }; /* - * For directory operation - */ -#define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1) -#define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2) -#define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3) -#define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4) -#define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5) - -/* * For superblock */ /* @@ -350,6 +346,7 @@ enum page_type { struct f2fs_sb_info { struct super_block *sb; /* pointer to VFS super block */ + struct proc_dir_entry *s_proc; /* proc entry */ struct buffer_head *raw_super_buf; /* buffer head of raw sb */ struct f2fs_super_block *raw_super; /* raw super block pointer */ int s_dirty; /* dirty flag for checkpoint */ @@ -429,6 +426,10 @@ struct f2fs_sb_info { #endif unsigned int last_victim[2]; /* last victim segment # */ spinlock_t stat_lock; /* lock for stat operations */ + + /* For sysfs suppport */ + struct kobject s_kobj; + struct completion s_kobj_unregister; }; /* @@ -454,6 +455,11 @@ static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi) return (struct f2fs_checkpoint *)(sbi->ckpt); } +static inline struct f2fs_node *F2FS_NODE(struct page *page) +{ + return (struct f2fs_node *)page_address(page); +} + static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi) { return (struct f2fs_nm_info *)(sbi->nm_info); @@ -489,6 +495,11 @@ static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi) sbi->s_dirty = 0; } +static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp) +{ + return le64_to_cpu(cp->checkpoint_ver); +} + static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) { unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); @@ -677,7 +688,7 @@ static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) { block_t start_addr; struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); - unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver); + unsigned long long ckpt_version = cur_cp_version(ckpt); start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); @@ -812,7 +823,7 @@ static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, static inline bool IS_INODE(struct page *page) { - struct f2fs_node *p = (struct f2fs_node *)page_address(page); + struct f2fs_node *p = F2FS_NODE(page); return RAW_IS_INODE(p); } @@ -826,7 +837,7 @@ static inline block_t datablock_addr(struct page *node_page, { struct f2fs_node *raw_node; __le32 *addr_array; - raw_node = (struct f2fs_node *)page_address(node_page); + raw_node = F2FS_NODE(node_page); addr_array = blkaddr_in_node(raw_node); return le32_to_cpu(addr_array[offset]); } @@ -873,6 +884,7 @@ enum { FI_NO_ALLOC, /* should not allocate any blocks */ FI_UPDATE_DIR, /* should update inode block for consistency */ FI_DELAY_IPUT, /* used for the recovery */ + FI_INLINE_XATTR, /* used for inline xattr */ }; static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) @@ -905,6 +917,45 @@ static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag) return 0; } +static inline void get_inline_info(struct f2fs_inode_info *fi, + struct f2fs_inode *ri) +{ + if (ri->i_inline & F2FS_INLINE_XATTR) + set_inode_flag(fi, FI_INLINE_XATTR); +} + +static inline void set_raw_inline(struct f2fs_inode_info *fi, + struct f2fs_inode *ri) +{ + ri->i_inline = 0; + + if (is_inode_flag_set(fi, FI_INLINE_XATTR)) + ri->i_inline |= F2FS_INLINE_XATTR; +} + +static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi) +{ + if (is_inode_flag_set(fi, FI_INLINE_XATTR)) + return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS; + return DEF_ADDRS_PER_INODE; +} + +static inline void *inline_xattr_addr(struct page *page) +{ + struct f2fs_inode *ri; + ri = (struct f2fs_inode *)page_address(page); + return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE - + F2FS_INLINE_XATTR_ADDRS]); +} + +static inline int inline_xattr_size(struct inode *inode) +{ + if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR)) + return F2FS_INLINE_XATTR_ADDRS << 2; + else + return 0; +} + static inline int f2fs_readonly(struct super_block *sb) { return sb->s_flags & MS_RDONLY; @@ -947,6 +998,7 @@ struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); ino_t f2fs_inode_by_name(struct inode *, struct qstr *); void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, struct page *, struct inode *); +int update_dent_inode(struct inode *, const struct qstr *); int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *); void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *); int f2fs_make_empty(struct inode *, struct inode *); @@ -980,6 +1032,7 @@ int is_checkpointed_node(struct f2fs_sb_info *, nid_t); void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); int truncate_inode_blocks(struct inode *, pgoff_t); +int truncate_xattr_node(struct inode *, struct page *); int remove_inode_page(struct inode *); struct page *new_inode_page(struct inode *, const struct qstr *); struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *); @@ -1012,7 +1065,8 @@ int npages_for_summary_flush(struct f2fs_sb_info *); void allocate_new_segments(struct f2fs_sb_info *); struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); struct bio *f2fs_bio_alloc(struct block_device *, int); -void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync); +void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool); +void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool); void write_meta_page(struct f2fs_sb_info *, struct page *); void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int, block_t, block_t *); @@ -1037,7 +1091,8 @@ void destroy_segment_manager(struct f2fs_sb_info *); struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); -int check_orphan_space(struct f2fs_sb_info *); +int acquire_orphan_inode(struct f2fs_sb_info *); +void release_orphan_inode(struct f2fs_sb_info *); void add_orphan_inode(struct f2fs_sb_info *, nid_t); void remove_orphan_inode(struct f2fs_sb_info *, nid_t); int recover_orphan_inodes(struct f2fs_sb_info *); @@ -1068,7 +1123,7 @@ int do_write_data_page(struct page *); */ int start_gc_thread(struct f2fs_sb_info *); void stop_gc_thread(struct f2fs_sb_info *); -block_t start_bidx_of_node(unsigned int); +block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *); int f2fs_gc(struct f2fs_sb_info *); void build_gc_manager(struct f2fs_sb_info *); int __init create_gc_caches(void); @@ -1112,11 +1167,16 @@ struct f2fs_stat_info { unsigned base_mem, cache_mem; }; +static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi) +{ + return (struct f2fs_stat_info*)sbi->stat_info; +} + #define stat_inc_call_count(si) ((si)->call_count++) #define stat_inc_seg_count(sbi, type) \ do { \ - struct f2fs_stat_info *si = sbi->stat_info; \ + struct f2fs_stat_info *si = F2FS_STAT(sbi); \ (si)->tot_segs++; \ if (type == SUM_TYPE_DATA) \ si->data_segs++; \ @@ -1129,14 +1189,14 @@ struct f2fs_stat_info { #define stat_inc_data_blk_count(sbi, blks) \ do { \ - struct f2fs_stat_info *si = sbi->stat_info; \ + struct f2fs_stat_info *si = F2FS_STAT(sbi); \ stat_inc_tot_blk_count(si, blks); \ si->data_blks += (blks); \ } while (0) #define stat_inc_node_blk_count(sbi, blks) \ do { \ - struct f2fs_stat_info *si = sbi->stat_info; \ + struct f2fs_stat_info *si = F2FS_STAT(sbi); \ stat_inc_tot_blk_count(si, blks); \ si->node_blks += (blks); \ } while (0) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index d2d2b7dbdcc1..02c906971cc6 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -112,11 +112,13 @@ static int get_parent_ino(struct inode *inode, nid_t *pino) if (!dentry) return 0; - inode = igrab(dentry->d_parent->d_inode); - dput(dentry); + if (update_dent_inode(inode, &dentry->d_name)) { + dput(dentry); + return 0; + } - *pino = inode->i_ino; - iput(inode); + *pino = parent_ino(dentry); + dput(dentry); return 1; } @@ -147,9 +149,10 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) mutex_lock(&inode->i_mutex); - if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) - goto out; - + /* + * Both of fdatasync() and fsync() are able to be recovered from + * sudden-power-off. + */ if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) need_cp = true; else if (file_wrong_pino(inode)) @@ -158,10 +161,14 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) need_cp = true; else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) need_cp = true; + else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) + need_cp = true; if (need_cp) { nid_t pino; + F2FS_I(inode)->xattr_ver = 0; + /* all the dirty node pages should be flushed for POR */ ret = f2fs_sync_fs(inode->i_sb, 1); if (file_wrong_pino(inode) && inode->i_nlink == 1 && @@ -205,7 +212,7 @@ int truncate_data_blocks_range(struct dnode_of_data *dn, int count) struct f2fs_node *raw_node; __le32 *addr; - raw_node = page_address(dn->node_page); + raw_node = F2FS_NODE(dn->node_page); addr = blkaddr_in_node(raw_node) + ofs; for ( ; count > 0; count--, addr++, dn->ofs_in_node++) { @@ -283,7 +290,7 @@ static int truncate_blocks(struct inode *inode, u64 from) } if (IS_INODE(dn.node_page)) - count = ADDRS_PER_INODE; + count = ADDRS_PER_INODE(F2FS_I(inode)); else count = ADDRS_PER_BLOCK; diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 35f9b1a196aa..2f157e883687 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -29,10 +29,11 @@ static struct kmem_cache *winode_slab; static int gc_thread_func(void *data) { struct f2fs_sb_info *sbi = data; + struct f2fs_gc_kthread *gc_th = sbi->gc_thread; wait_queue_head_t *wq = &sbi->gc_thread->gc_wait_queue_head; long wait_ms; - wait_ms = GC_THREAD_MIN_SLEEP_TIME; + wait_ms = gc_th->min_sleep_time; do { if (try_to_freeze()) @@ -45,7 +46,7 @@ static int gc_thread_func(void *data) break; if (sbi->sb->s_writers.frozen >= SB_FREEZE_WRITE) { - wait_ms = GC_THREAD_MAX_SLEEP_TIME; + wait_ms = increase_sleep_time(gc_th, wait_ms); continue; } @@ -66,15 +67,15 @@ static int gc_thread_func(void *data) continue; if (!is_idle(sbi)) { - wait_ms = increase_sleep_time(wait_ms); + wait_ms = increase_sleep_time(gc_th, wait_ms); mutex_unlock(&sbi->gc_mutex); continue; } if (has_enough_invalid_blocks(sbi)) - wait_ms = decrease_sleep_time(wait_ms); + wait_ms = decrease_sleep_time(gc_th, wait_ms); else - wait_ms = increase_sleep_time(wait_ms); + wait_ms = increase_sleep_time(gc_th, wait_ms); #ifdef CONFIG_F2FS_STAT_FS sbi->bg_gc++; @@ -82,7 +83,7 @@ static int gc_thread_func(void *data) /* if return value is not zero, no victim was selected */ if (f2fs_gc(sbi)) - wait_ms = GC_THREAD_NOGC_SLEEP_TIME; + wait_ms = gc_th->no_gc_sleep_time; } while (!kthread_should_stop()); return 0; } @@ -101,6 +102,12 @@ int start_gc_thread(struct f2fs_sb_info *sbi) goto out; } + gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME; + gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME; + gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME; + + gc_th->gc_idle = 0; + sbi->gc_thread = gc_th; init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head); sbi->gc_thread->f2fs_gc_task = kthread_run(gc_thread_func, sbi, @@ -125,9 +132,17 @@ void stop_gc_thread(struct f2fs_sb_info *sbi) sbi->gc_thread = NULL; } -static int select_gc_type(int gc_type) +static int select_gc_type(struct f2fs_gc_kthread *gc_th, int gc_type) { - return (gc_type == BG_GC) ? GC_CB : GC_GREEDY; + int gc_mode = (gc_type == BG_GC) ? GC_CB : GC_GREEDY; + + if (gc_th && gc_th->gc_idle) { + if (gc_th->gc_idle == 1) + gc_mode = GC_CB; + else if (gc_th->gc_idle == 2) + gc_mode = GC_GREEDY; + } + return gc_mode; } static void select_policy(struct f2fs_sb_info *sbi, int gc_type, @@ -138,12 +153,18 @@ static void select_policy(struct f2fs_sb_info *sbi, int gc_type, if (p->alloc_mode == SSR) { p->gc_mode = GC_GREEDY; p->dirty_segmap = dirty_i->dirty_segmap[type]; + p->max_search = dirty_i->nr_dirty[type]; p->ofs_unit = 1; } else { - p->gc_mode = select_gc_type(gc_type); + p->gc_mode = select_gc_type(sbi->gc_thread, gc_type); p->dirty_segmap = dirty_i->dirty_segmap[DIRTY]; + p->max_search = dirty_i->nr_dirty[DIRTY]; p->ofs_unit = sbi->segs_per_sec; } + + if (p->max_search > MAX_VICTIM_SEARCH) + p->max_search = MAX_VICTIM_SEARCH; + p->offset = sbi->last_victim[p->gc_mode]; } @@ -290,7 +311,7 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi, if (cost == max_cost) continue; - if (nsearched++ >= MAX_VICTIM_SEARCH) { + if (nsearched++ >= p.max_search) { sbi->last_victim[p.gc_mode] = segno; break; } @@ -407,8 +428,7 @@ next_step: /* set page dirty and write it */ if (gc_type == FG_GC) { - f2fs_submit_bio(sbi, NODE, true); - wait_on_page_writeback(node_page); + f2fs_wait_on_page_writeback(node_page, NODE, true); set_page_dirty(node_page); } else { if (!PageWriteback(node_page)) @@ -447,7 +467,7 @@ next_step: * as indirect or double indirect node blocks, are given, it must be a caller's * bug. */ -block_t start_bidx_of_node(unsigned int node_ofs) +block_t start_bidx_of_node(unsigned int node_ofs, struct f2fs_inode_info *fi) { unsigned int indirect_blks = 2 * NIDS_PER_BLOCK + 4; unsigned int bidx; @@ -464,7 +484,7 @@ block_t start_bidx_of_node(unsigned int node_ofs) int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1); bidx = node_ofs - 5 - dec; } - return bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE; + return bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE(fi); } static int check_dnode(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, @@ -508,10 +528,7 @@ static void move_data_page(struct inode *inode, struct page *page, int gc_type) } else { struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); - if (PageWriteback(page)) { - f2fs_submit_bio(sbi, DATA, true); - wait_on_page_writeback(page); - } + f2fs_wait_on_page_writeback(page, DATA, true); if (clear_page_dirty_for_io(page) && S_ISDIR(inode->i_mode)) { @@ -575,7 +592,6 @@ next_step: continue; } - start_bidx = start_bidx_of_node(nofs); ofs_in_node = le16_to_cpu(entry->ofs_in_node); if (phase == 2) { @@ -583,6 +599,8 @@ next_step: if (IS_ERR(inode)) continue; + start_bidx = start_bidx_of_node(nofs, F2FS_I(inode)); + data_page = find_data_page(inode, start_bidx + ofs_in_node, false); if (IS_ERR(data_page)) @@ -593,6 +611,8 @@ next_step: } else { inode = find_gc_inode(dni.ino, ilist); if (inode) { + start_bidx = start_bidx_of_node(nofs, + F2FS_I(inode)); data_page = get_lock_data_page(inode, start_bidx + ofs_in_node); if (IS_ERR(data_page)) diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h index 2c6a6bd08322..507056d22205 100644 --- a/fs/f2fs/gc.h +++ b/fs/f2fs/gc.h @@ -13,18 +13,26 @@ * whether IO subsystem is idle * or not */ -#define GC_THREAD_MIN_SLEEP_TIME 30000 /* milliseconds */ -#define GC_THREAD_MAX_SLEEP_TIME 60000 -#define GC_THREAD_NOGC_SLEEP_TIME 300000 /* wait 5 min */ +#define DEF_GC_THREAD_MIN_SLEEP_TIME 30000 /* milliseconds */ +#define DEF_GC_THREAD_MAX_SLEEP_TIME 60000 +#define DEF_GC_THREAD_NOGC_SLEEP_TIME 300000 /* wait 5 min */ #define LIMIT_INVALID_BLOCK 40 /* percentage over total user space */ #define LIMIT_FREE_BLOCK 40 /* percentage over invalid + free space */ /* Search max. number of dirty segments to select a victim segment */ -#define MAX_VICTIM_SEARCH 20 +#define MAX_VICTIM_SEARCH 4096 /* covers 8GB */ struct f2fs_gc_kthread { struct task_struct *f2fs_gc_task; wait_queue_head_t gc_wait_queue_head; + + /* for gc sleep time */ + unsigned int min_sleep_time; + unsigned int max_sleep_time; + unsigned int no_gc_sleep_time; + + /* for changing gc mode */ + unsigned int gc_idle; }; struct inode_entry { @@ -56,25 +64,25 @@ static inline block_t limit_free_user_blocks(struct f2fs_sb_info *sbi) return (long)(reclaimable_user_blocks * LIMIT_FREE_BLOCK) / 100; } -static inline long increase_sleep_time(long wait) +static inline long increase_sleep_time(struct f2fs_gc_kthread *gc_th, long wait) { - if (wait == GC_THREAD_NOGC_SLEEP_TIME) + if (wait == gc_th->no_gc_sleep_time) return wait; - wait += GC_THREAD_MIN_SLEEP_TIME; - if (wait > GC_THREAD_MAX_SLEEP_TIME) - wait = GC_THREAD_MAX_SLEEP_TIME; + wait += gc_th->min_sleep_time; + if (wait > gc_th->max_sleep_time) + wait = gc_th->max_sleep_time; return wait; } -static inline long decrease_sleep_time(long wait) +static inline long decrease_sleep_time(struct f2fs_gc_kthread *gc_th, long wait) { - if (wait == GC_THREAD_NOGC_SLEEP_TIME) - wait = GC_THREAD_MAX_SLEEP_TIME; + if (wait == gc_th->no_gc_sleep_time) + wait = gc_th->max_sleep_time; - wait -= GC_THREAD_MIN_SLEEP_TIME; - if (wait <= GC_THREAD_MIN_SLEEP_TIME) - wait = GC_THREAD_MIN_SLEEP_TIME; + wait -= gc_th->min_sleep_time; + if (wait <= gc_th->min_sleep_time) + wait = gc_th->min_sleep_time; return wait; } diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 2b2d45d19e3e..9339cd292047 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -56,7 +56,7 @@ static int do_read_inode(struct inode *inode) if (IS_ERR(node_page)) return PTR_ERR(node_page); - rn = page_address(node_page); + rn = F2FS_NODE(node_page); ri = &(rn->i); inode->i_mode = le16_to_cpu(ri->i_mode); @@ -85,6 +85,7 @@ static int do_read_inode(struct inode *inode) fi->i_advise = ri->i_advise; fi->i_pino = le32_to_cpu(ri->i_pino); get_extent_info(&fi->ext, ri->i_ext); + get_inline_info(fi, ri); f2fs_put_page(node_page, 1); return 0; } @@ -151,9 +152,9 @@ void update_inode(struct inode *inode, struct page *node_page) struct f2fs_node *rn; struct f2fs_inode *ri; - wait_on_page_writeback(node_page); + f2fs_wait_on_page_writeback(node_page, NODE, false); - rn = page_address(node_page); + rn = F2FS_NODE(node_page); ri = &(rn->i); ri->i_mode = cpu_to_le16(inode->i_mode); @@ -164,6 +165,7 @@ void update_inode(struct inode *inode, struct page *node_page) ri->i_size = cpu_to_le64(i_size_read(inode)); ri->i_blocks = cpu_to_le64(inode->i_blocks); set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); + set_raw_inline(F2FS_I(inode), ri); ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); @@ -221,9 +223,6 @@ int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE)) return 0; - if (wbc) - f2fs_balance_fs(sbi); - /* * We need to lock here to prevent from producing dirty node pages * during the urgent cleaning time when runing out of free sections. @@ -231,6 +230,10 @@ int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) ilock = mutex_lock_op(sbi); ret = update_inode_page(inode); mutex_unlock_op(sbi, ilock); + + if (wbc) + f2fs_balance_fs(sbi); + return ret; } diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 64c07169df05..2a5359c990fc 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -83,21 +83,11 @@ static int is_multimedia_file(const unsigned char *s, const char *sub) { size_t slen = strlen(s); size_t sublen = strlen(sub); - int ret; if (sublen > slen) return 0; - ret = memcmp(s + slen - sublen, sub, sublen); - if (ret) { /* compare upper case */ - int i; - char upper_sub[8]; - for (i = 0; i < sublen && i < sizeof(upper_sub); i++) - upper_sub[i] = toupper(sub[i]); - return !memcmp(s + slen - sublen, upper_sub, sublen); - } - - return !ret; + return !strncasecmp(s + slen - sublen, sub, sublen); } /* @@ -239,7 +229,7 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry) if (!de) goto fail; - err = check_orphan_space(sbi); + err = acquire_orphan_inode(sbi); if (err) { kunmap(page); f2fs_put_page(page, 0); @@ -393,7 +383,7 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *old_inode = old_dentry->d_inode; struct inode *new_inode = new_dentry->d_inode; struct page *old_dir_page; - struct page *old_page; + struct page *old_page, *new_page; struct f2fs_dir_entry *old_dir_entry = NULL; struct f2fs_dir_entry *old_entry; struct f2fs_dir_entry *new_entry; @@ -415,7 +405,6 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, ilock = mutex_lock_op(sbi); if (new_inode) { - struct page *new_page; err = -ENOTEMPTY; if (old_dir_entry && !f2fs_empty_dir(new_inode)) @@ -427,14 +416,28 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, if (!new_entry) goto out_dir; + err = acquire_orphan_inode(sbi); + if (err) + goto put_out_dir; + + if (update_dent_inode(old_inode, &new_dentry->d_name)) { + release_orphan_inode(sbi); + goto put_out_dir; + } + f2fs_set_link(new_dir, new_entry, new_page, old_inode); new_inode->i_ctime = CURRENT_TIME; if (old_dir_entry) drop_nlink(new_inode); drop_nlink(new_inode); + if (!new_inode->i_nlink) add_orphan_inode(sbi, new_inode->i_ino); + else + release_orphan_inode(sbi); + + update_inode_page(old_inode); update_inode_page(new_inode); } else { err = f2fs_add_link(new_dentry, old_inode); @@ -467,6 +470,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, mutex_unlock_op(sbi, ilock); return 0; +put_out_dir: + f2fs_put_page(new_page, 1); out_dir: if (old_dir_entry) { kunmap(old_dir_page); diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index b418aee09573..51ef27894433 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -315,9 +315,10 @@ cache: * The maximum depth is four. * Offset[0] will have raw inode offset. */ -static int get_node_path(long block, int offset[4], unsigned int noffset[4]) +static int get_node_path(struct f2fs_inode_info *fi, long block, + int offset[4], unsigned int noffset[4]) { - const long direct_index = ADDRS_PER_INODE; + const long direct_index = ADDRS_PER_INODE(fi); const long direct_blks = ADDRS_PER_BLOCK; const long dptrs_per_blk = NIDS_PER_BLOCK; const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; @@ -405,7 +406,7 @@ int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) int level, i; int err = 0; - level = get_node_path(index, offset, noffset); + level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); nids[0] = dn->inode->i_ino; npage[0] = dn->inode_page; @@ -565,7 +566,7 @@ static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, return PTR_ERR(page); } - rn = (struct f2fs_node *)page_address(page); + rn = F2FS_NODE(page); if (depth < 3) { for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { child_nid = le32_to_cpu(rn->in.nid[i]); @@ -687,7 +688,7 @@ int truncate_inode_blocks(struct inode *inode, pgoff_t from) trace_f2fs_truncate_inode_blocks_enter(inode, from); - level = get_node_path(from, offset, noffset); + level = get_node_path(F2FS_I(inode), from, offset, noffset); restart: page = get_node_page(sbi, inode->i_ino); if (IS_ERR(page)) { @@ -698,7 +699,7 @@ restart: set_new_dnode(&dn, inode, page, NULL, 0); unlock_page(page); - rn = page_address(page); + rn = F2FS_NODE(page); switch (level) { case 0: case 1: @@ -771,6 +772,33 @@ fail: return err > 0 ? 0 : err; } +int truncate_xattr_node(struct inode *inode, struct page *page) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + nid_t nid = F2FS_I(inode)->i_xattr_nid; + struct dnode_of_data dn; + struct page *npage; + + if (!nid) + return 0; + + npage = get_node_page(sbi, nid); + if (IS_ERR(npage)) + return PTR_ERR(npage); + + F2FS_I(inode)->i_xattr_nid = 0; + + /* need to do checkpoint during fsync */ + F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); + + set_new_dnode(&dn, inode, page, npage, nid); + + if (page) + dn.inode_page_locked = 1; + truncate_node(&dn); + return 0; +} + /* * Caller should grab and release a mutex by calling mutex_lock_op() and * mutex_unlock_op(). @@ -781,22 +809,16 @@ int remove_inode_page(struct inode *inode) struct page *page; nid_t ino = inode->i_ino; struct dnode_of_data dn; + int err; page = get_node_page(sbi, ino); if (IS_ERR(page)) return PTR_ERR(page); - if (F2FS_I(inode)->i_xattr_nid) { - nid_t nid = F2FS_I(inode)->i_xattr_nid; - struct page *npage = get_node_page(sbi, nid); - - if (IS_ERR(npage)) - return PTR_ERR(npage); - - F2FS_I(inode)->i_xattr_nid = 0; - set_new_dnode(&dn, inode, page, npage, nid); - dn.inode_page_locked = 1; - truncate_node(&dn); + err = truncate_xattr_node(inode, page); + if (err) { + f2fs_put_page(page, 1); + return err; } /* 0 is possible, after f2fs_new_inode() is failed */ @@ -833,29 +855,32 @@ struct page *new_node_page(struct dnode_of_data *dn, if (!page) return ERR_PTR(-ENOMEM); - get_node_info(sbi, dn->nid, &old_ni); + if (!inc_valid_node_count(sbi, dn->inode, 1)) { + err = -ENOSPC; + goto fail; + } - SetPageUptodate(page); - fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); + get_node_info(sbi, dn->nid, &old_ni); /* Reinitialize old_ni with new node page */ BUG_ON(old_ni.blk_addr != NULL_ADDR); new_ni = old_ni; new_ni.ino = dn->inode->i_ino; - - if (!inc_valid_node_count(sbi, dn->inode, 1)) { - err = -ENOSPC; - goto fail; - } set_node_addr(sbi, &new_ni, NEW_ADDR); + + fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); set_cold_node(dn->inode, page); + SetPageUptodate(page); + set_page_dirty(page); + + if (ofs == XATTR_NODE_OFFSET) + F2FS_I(dn->inode)->i_xattr_nid = dn->nid; dn->node_page = page; if (ipage) update_inode(dn->inode, ipage); else sync_inode_page(dn); - set_page_dirty(page); if (ofs == 0) inc_valid_inode_count(sbi); @@ -916,7 +941,6 @@ void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) f2fs_put_page(apage, 0); else if (err == LOCKED_PAGE) f2fs_put_page(apage, 1); - return; } struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) @@ -1167,9 +1191,9 @@ static int f2fs_write_node_page(struct page *page, /* * It is very important to gather dirty pages and write at once, so that we can * submit a big bio without interfering other data writes. - * Be default, 512 pages (2MB), a segment size, is quite reasonable. + * Be default, 512 pages (2MB) * 3 node types, is more reasonable. */ -#define COLLECT_DIRTY_NODES 512 +#define COLLECT_DIRTY_NODES 1536 static int f2fs_write_node_pages(struct address_space *mapping, struct writeback_control *wbc) { @@ -1187,9 +1211,10 @@ static int f2fs_write_node_pages(struct address_space *mapping, return 0; /* if mounting is failed, skip writing node pages */ - wbc->nr_to_write = max_hw_blocks(sbi); + wbc->nr_to_write = 3 * max_hw_blocks(sbi); sync_node_pages(sbi, 0, wbc); - wbc->nr_to_write = nr_to_write - (max_hw_blocks(sbi) - wbc->nr_to_write); + wbc->nr_to_write = nr_to_write - (3 * max_hw_blocks(sbi) - + wbc->nr_to_write); return 0; } @@ -1444,6 +1469,9 @@ void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) struct f2fs_nm_info *nm_i = NM_I(sbi); struct free_nid *i; + if (!nid) + return; + spin_lock(&nm_i->free_nid_list_lock); i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); BUG_ON(!i || i->state != NID_ALLOC); @@ -1484,8 +1512,8 @@ int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) SetPageUptodate(ipage); fill_node_footer(ipage, ino, ino, 0, true); - src = (struct f2fs_node *)page_address(page); - dst = (struct f2fs_node *)page_address(ipage); + src = F2FS_NODE(page); + dst = F2FS_NODE(ipage); memcpy(dst, src, (unsigned long)&src->i.i_ext - (unsigned long)&src->i); dst->i.i_size = 0; @@ -1515,8 +1543,8 @@ int restore_node_summary(struct f2fs_sb_info *sbi, /* alloc temporal page for read node */ page = alloc_page(GFP_NOFS | __GFP_ZERO); - if (IS_ERR(page)) - return PTR_ERR(page); + if (!page) + return -ENOMEM; lock_page(page); /* scan the node segment */ @@ -1535,7 +1563,7 @@ int restore_node_summary(struct f2fs_sb_info *sbi, goto out; lock_page(page); - rn = (struct f2fs_node *)page_address(page); + rn = F2FS_NODE(page); sum_entry->nid = rn->footer.nid; sum_entry->version = 0; sum_entry->ofs_in_node = 0; diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h index c65fb4f4230f..3496bb3e15dc 100644 --- a/fs/f2fs/node.h +++ b/fs/f2fs/node.h @@ -155,8 +155,7 @@ static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid) static inline void fill_node_footer(struct page *page, nid_t nid, nid_t ino, unsigned int ofs, bool reset) { - void *kaddr = page_address(page); - struct f2fs_node *rn = (struct f2fs_node *)kaddr; + struct f2fs_node *rn = F2FS_NODE(page); if (reset) memset(rn, 0, sizeof(*rn)); rn->footer.nid = cpu_to_le32(nid); @@ -166,10 +165,8 @@ static inline void fill_node_footer(struct page *page, nid_t nid, static inline void copy_node_footer(struct page *dst, struct page *src) { - void *src_addr = page_address(src); - void *dst_addr = page_address(dst); - struct f2fs_node *src_rn = (struct f2fs_node *)src_addr; - struct f2fs_node *dst_rn = (struct f2fs_node *)dst_addr; + struct f2fs_node *src_rn = F2FS_NODE(src); + struct f2fs_node *dst_rn = F2FS_NODE(dst); memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer)); } @@ -177,45 +174,40 @@ static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr) { struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); - void *kaddr = page_address(page); - struct f2fs_node *rn = (struct f2fs_node *)kaddr; + struct f2fs_node *rn = F2FS_NODE(page); + rn->footer.cp_ver = ckpt->checkpoint_ver; rn->footer.next_blkaddr = cpu_to_le32(blkaddr); } static inline nid_t ino_of_node(struct page *node_page) { - void *kaddr = page_address(node_page); - struct f2fs_node *rn = (struct f2fs_node *)kaddr; + struct f2fs_node *rn = F2FS_NODE(node_page); return le32_to_cpu(rn->footer.ino); } static inline nid_t nid_of_node(struct page *node_page) { - void *kaddr = page_address(node_page); - struct f2fs_node *rn = (struct f2fs_node *)kaddr; + struct f2fs_node *rn = F2FS_NODE(node_page); return le32_to_cpu(rn->footer.nid); } static inline unsigned int ofs_of_node(struct page *node_page) { - void *kaddr = page_address(node_page); - struct f2fs_node *rn = (struct f2fs_node *)kaddr; + struct f2fs_node *rn = F2FS_NODE(node_page); unsigned flag = le32_to_cpu(rn->footer.flag); return flag >> OFFSET_BIT_SHIFT; } static inline unsigned long long cpver_of_node(struct page *node_page) { - void *kaddr = page_address(node_page); - struct f2fs_node *rn = (struct f2fs_node *)kaddr; + struct f2fs_node *rn = F2FS_NODE(node_page); return le64_to_cpu(rn->footer.cp_ver); } static inline block_t next_blkaddr_of_node(struct page *node_page) { - void *kaddr = page_address(node_page); - struct f2fs_node *rn = (struct f2fs_node *)kaddr; + struct f2fs_node *rn = F2FS_NODE(node_page); return le32_to_cpu(rn->footer.next_blkaddr); } @@ -237,6 +229,10 @@ static inline block_t next_blkaddr_of_node(struct page *node_page) static inline bool IS_DNODE(struct page *node_page) { unsigned int ofs = ofs_of_node(node_page); + + if (ofs == XATTR_NODE_OFFSET) + return false; + if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK || ofs == 5 + 2 * NIDS_PER_BLOCK) return false; @@ -250,7 +246,7 @@ static inline bool IS_DNODE(struct page *node_page) static inline void set_nid(struct page *p, int off, nid_t nid, bool i) { - struct f2fs_node *rn = (struct f2fs_node *)page_address(p); + struct f2fs_node *rn = F2FS_NODE(p); wait_on_page_writeback(p); @@ -263,7 +259,8 @@ static inline void set_nid(struct page *p, int off, nid_t nid, bool i) static inline nid_t get_nid(struct page *p, int off, bool i) { - struct f2fs_node *rn = (struct f2fs_node *)page_address(p); + struct f2fs_node *rn = F2FS_NODE(p); + if (i) return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]); return le32_to_cpu(rn->in.nid[off]); @@ -314,8 +311,7 @@ static inline void clear_cold_data(struct page *page) static inline int is_node(struct page *page, int type) { - void *kaddr = page_address(page); - struct f2fs_node *rn = (struct f2fs_node *)kaddr; + struct f2fs_node *rn = F2FS_NODE(page); return le32_to_cpu(rn->footer.flag) & (1 << type); } @@ -325,7 +321,7 @@ static inline int is_node(struct page *page, int type) static inline void set_cold_node(struct inode *inode, struct page *page) { - struct f2fs_node *rn = (struct f2fs_node *)page_address(page); + struct f2fs_node *rn = F2FS_NODE(page); unsigned int flag = le32_to_cpu(rn->footer.flag); if (S_ISDIR(inode->i_mode)) @@ -337,7 +333,7 @@ static inline void set_cold_node(struct inode *inode, struct page *page) static inline void set_mark(struct page *page, int mark, int type) { - struct f2fs_node *rn = (struct f2fs_node *)page_address(page); + struct f2fs_node *rn = F2FS_NODE(page); unsigned int flag = le32_to_cpu(rn->footer.flag); if (mark) flag |= (0x1 << type); diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c index d56d951c2253..51ef5eec33d7 100644 --- a/fs/f2fs/recovery.c +++ b/fs/f2fs/recovery.c @@ -40,8 +40,7 @@ static struct fsync_inode_entry *get_fsync_inode(struct list_head *head, static int recover_dentry(struct page *ipage, struct inode *inode) { - void *kaddr = page_address(ipage); - struct f2fs_node *raw_node = (struct f2fs_node *)kaddr; + struct f2fs_node *raw_node = F2FS_NODE(ipage); struct f2fs_inode *raw_inode = &(raw_node->i); nid_t pino = le32_to_cpu(raw_inode->i_pino); struct f2fs_dir_entry *de; @@ -93,8 +92,7 @@ out: static int recover_inode(struct inode *inode, struct page *node_page) { - void *kaddr = page_address(node_page); - struct f2fs_node *raw_node = (struct f2fs_node *)kaddr; + struct f2fs_node *raw_node = F2FS_NODE(node_page); struct f2fs_inode *raw_inode = &(raw_node->i); if (!IS_INODE(node_page)) @@ -119,7 +117,7 @@ static int recover_inode(struct inode *inode, struct page *node_page) static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head) { - unsigned long long cp_ver = le64_to_cpu(sbi->ckpt->checkpoint_ver); + unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi)); struct curseg_info *curseg; struct page *page; block_t blkaddr; @@ -131,8 +129,8 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head) /* read node page */ page = alloc_page(GFP_F2FS_ZERO); - if (IS_ERR(page)) - return PTR_ERR(page); + if (!page) + return -ENOMEM; lock_page(page); while (1) { @@ -215,6 +213,7 @@ static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi, void *kaddr; struct inode *inode; struct page *node_page; + unsigned int offset; block_t bidx; int i; @@ -259,8 +258,8 @@ static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi, node_page = get_node_page(sbi, nid); if (IS_ERR(node_page)) return PTR_ERR(node_page); - bidx = start_bidx_of_node(ofs_of_node(node_page)) + - le16_to_cpu(sum.ofs_in_node); + + offset = ofs_of_node(node_page); ino = ino_of_node(node_page); f2fs_put_page(node_page, 1); @@ -269,6 +268,9 @@ static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi, if (IS_ERR(inode)) return PTR_ERR(inode); + bidx = start_bidx_of_node(offset, F2FS_I(inode)) + + le16_to_cpu(sum.ofs_in_node); + truncate_hole(inode, bidx, bidx + 1); iput(inode); return 0; @@ -277,6 +279,7 @@ static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi, static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode, struct page *page, block_t blkaddr) { + struct f2fs_inode_info *fi = F2FS_I(inode); unsigned int start, end; struct dnode_of_data dn; struct f2fs_summary sum; @@ -284,9 +287,9 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode, int err = 0, recovered = 0; int ilock; - start = start_bidx_of_node(ofs_of_node(page)); + start = start_bidx_of_node(ofs_of_node(page), fi); if (IS_INODE(page)) - end = start + ADDRS_PER_INODE; + end = start + ADDRS_PER_INODE(fi); else end = start + ADDRS_PER_BLOCK; @@ -357,7 +360,7 @@ err: static int recover_data(struct f2fs_sb_info *sbi, struct list_head *head, int type) { - unsigned long long cp_ver = le64_to_cpu(sbi->ckpt->checkpoint_ver); + unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi)); struct curseg_info *curseg; struct page *page; int err = 0; @@ -369,7 +372,7 @@ static int recover_data(struct f2fs_sb_info *sbi, /* read node page */ page = alloc_page(GFP_NOFS | __GFP_ZERO); - if (IS_ERR(page)) + if (!page) return -ENOMEM; lock_page(page); diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index a86d125a9885..09af9c7b0f52 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -117,7 +117,6 @@ static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno) } mutex_unlock(&dirty_i->seglist_lock); - return; } /* @@ -261,7 +260,6 @@ static void __add_sum_entry(struct f2fs_sb_info *sbi, int type, void *addr = curseg->sum_blk; addr += curseg->next_blkoff * sizeof(struct f2fs_summary); memcpy(addr, sum, sizeof(struct f2fs_summary)); - return; } /* @@ -542,12 +540,9 @@ static void allocate_segment_by_default(struct f2fs_sb_info *sbi, { struct curseg_info *curseg = CURSEG_I(sbi, type); - if (force) { + if (force) new_curseg(sbi, type, true); - goto out; - } - - if (type == CURSEG_WARM_NODE) + else if (type == CURSEG_WARM_NODE) new_curseg(sbi, type, false); else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type)) new_curseg(sbi, type, false); @@ -555,11 +550,9 @@ static void allocate_segment_by_default(struct f2fs_sb_info *sbi, change_curseg(sbi, type, true); else new_curseg(sbi, type, false); -out: #ifdef CONFIG_F2FS_STAT_FS sbi->segment_count[curseg->alloc_type]++; #endif - return; } void allocate_new_segments(struct f2fs_sb_info *sbi) @@ -611,18 +604,12 @@ static void f2fs_end_io_write(struct bio *bio, int err) struct bio *f2fs_bio_alloc(struct block_device *bdev, int npages) { struct bio *bio; - struct bio_private *priv; -retry: - priv = kmalloc(sizeof(struct bio_private), GFP_NOFS); - if (!priv) { - cond_resched(); - goto retry; - } /* No failure on bio allocation */ bio = bio_alloc(GFP_NOIO, npages); bio->bi_bdev = bdev; - bio->bi_private = priv; + bio->bi_private = NULL; + return bio; } @@ -681,8 +668,17 @@ static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page, do_submit_bio(sbi, type, false); alloc_new: if (sbi->bio[type] == NULL) { + struct bio_private *priv; +retry: + priv = kmalloc(sizeof(struct bio_private), GFP_NOFS); + if (!priv) { + cond_resched(); + goto retry; + } + sbi->bio[type] = f2fs_bio_alloc(bdev, max_hw_blocks(sbi)); sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); + sbi->bio[type]->bi_private = priv; /* * The end_io will be assigned at the sumbission phase. * Until then, let bio_add_page() merge consecutive IOs as much @@ -702,6 +698,16 @@ alloc_new: trace_f2fs_submit_write_page(page, blk_addr, type); } +void f2fs_wait_on_page_writeback(struct page *page, + enum page_type type, bool sync) +{ + struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); + if (PageWriteback(page)) { + f2fs_submit_bio(sbi, type, sync); + wait_on_page_writeback(page); + } +} + static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type) { struct curseg_info *curseg = CURSEG_I(sbi, type); @@ -1179,7 +1185,6 @@ void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk) { if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE); - return; } int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type, diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 062424a0e4c3..bdd10eab8c40 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -142,6 +142,7 @@ struct victim_sel_policy { int alloc_mode; /* LFS or SSR */ int gc_mode; /* GC_CB or GC_GREEDY */ unsigned long *dirty_segmap; /* dirty segment bitmap */ + unsigned int max_search; /* maximum # of segments to search */ unsigned int offset; /* last scanned bitmap offset */ unsigned int ofs_unit; /* bitmap search unit */ unsigned int min_cost; /* minimum cost */ @@ -453,7 +454,8 @@ static inline int reserved_sections(struct f2fs_sb_info *sbi) static inline bool need_SSR(struct f2fs_sb_info *sbi) { - return (free_sections(sbi) < overprovision_sections(sbi)); + return ((prefree_segments(sbi) / sbi->segs_per_sec) + + free_sections(sbi) < overprovision_sections(sbi)); } static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, int freed) @@ -470,7 +472,7 @@ static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, int freed) static inline int utilization(struct f2fs_sb_info *sbi) { - return div_u64(valid_user_blocks(sbi) * 100, sbi->user_block_count); + return div_u64((u64)valid_user_blocks(sbi) * 100, sbi->user_block_count); } /* diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 75c7dc363e92..13d0a0fe49dd 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -18,20 +18,25 @@ #include <linux/parser.h> #include <linux/mount.h> #include <linux/seq_file.h> +#include <linux/proc_fs.h> #include <linux/random.h> #include <linux/exportfs.h> #include <linux/blkdev.h> #include <linux/f2fs_fs.h> +#include <linux/sysfs.h> #include "f2fs.h" #include "node.h" #include "segment.h" #include "xattr.h" +#include "gc.h" #define CREATE_TRACE_POINTS #include <trace/events/f2fs.h> +static struct proc_dir_entry *f2fs_proc_root; static struct kmem_cache *f2fs_inode_cachep; +static struct kset *f2fs_kset; enum { Opt_gc_background, @@ -42,6 +47,7 @@ enum { Opt_noacl, Opt_active_logs, Opt_disable_ext_identify, + Opt_inline_xattr, Opt_err, }; @@ -54,9 +60,117 @@ static match_table_t f2fs_tokens = { {Opt_noacl, "noacl"}, {Opt_active_logs, "active_logs=%u"}, {Opt_disable_ext_identify, "disable_ext_identify"}, + {Opt_inline_xattr, "inline_xattr"}, {Opt_err, NULL}, }; +/* Sysfs support for f2fs */ +struct f2fs_attr { + struct attribute attr; + ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); + ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, + const char *, size_t); + int offset; +}; + +static ssize_t f2fs_sbi_show(struct f2fs_attr *a, + struct f2fs_sb_info *sbi, char *buf) +{ + struct f2fs_gc_kthread *gc_kth = sbi->gc_thread; + unsigned int *ui; + + if (!gc_kth) + return -EINVAL; + + ui = (unsigned int *)(((char *)gc_kth) + a->offset); + + return snprintf(buf, PAGE_SIZE, "%u\n", *ui); +} + +static ssize_t f2fs_sbi_store(struct f2fs_attr *a, + struct f2fs_sb_info *sbi, + const char *buf, size_t count) +{ + struct f2fs_gc_kthread *gc_kth = sbi->gc_thread; + unsigned long t; + unsigned int *ui; + ssize_t ret; + + if (!gc_kth) + return -EINVAL; + + ui = (unsigned int *)(((char *)gc_kth) + a->offset); + + ret = kstrtoul(skip_spaces(buf), 0, &t); + if (ret < 0) + return ret; + *ui = t; + return count; +} + +static ssize_t f2fs_attr_show(struct kobject *kobj, + struct attribute *attr, char *buf) +{ + struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, + s_kobj); + struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); + + return a->show ? a->show(a, sbi, buf) : 0; +} + +static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t len) +{ + struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, + s_kobj); + struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); + + return a->store ? a->store(a, sbi, buf, len) : 0; +} + +static void f2fs_sb_release(struct kobject *kobj) +{ + struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, + s_kobj); + complete(&sbi->s_kobj_unregister); +} + +#define F2FS_ATTR_OFFSET(_name, _mode, _show, _store, _elname) \ +static struct f2fs_attr f2fs_attr_##_name = { \ + .attr = {.name = __stringify(_name), .mode = _mode }, \ + .show = _show, \ + .store = _store, \ + .offset = offsetof(struct f2fs_gc_kthread, _elname), \ +} + +#define F2FS_RW_ATTR(name, elname) \ + F2FS_ATTR_OFFSET(name, 0644, f2fs_sbi_show, f2fs_sbi_store, elname) + +F2FS_RW_ATTR(gc_min_sleep_time, min_sleep_time); +F2FS_RW_ATTR(gc_max_sleep_time, max_sleep_time); +F2FS_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time); +F2FS_RW_ATTR(gc_idle, gc_idle); + +#define ATTR_LIST(name) (&f2fs_attr_##name.attr) +static struct attribute *f2fs_attrs[] = { + ATTR_LIST(gc_min_sleep_time), + ATTR_LIST(gc_max_sleep_time), + ATTR_LIST(gc_no_gc_sleep_time), + ATTR_LIST(gc_idle), + NULL, +}; + +static const struct sysfs_ops f2fs_attr_ops = { + .show = f2fs_attr_show, + .store = f2fs_attr_store, +}; + +static struct kobj_type f2fs_ktype = { + .default_attrs = f2fs_attrs, + .sysfs_ops = &f2fs_attr_ops, + .release = f2fs_sb_release, +}; + void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) { struct va_format vaf; @@ -126,11 +240,18 @@ static int parse_options(struct super_block *sb, char *options) case Opt_nouser_xattr: clear_opt(sbi, XATTR_USER); break; + case Opt_inline_xattr: + set_opt(sbi, INLINE_XATTR); + break; #else case Opt_nouser_xattr: f2fs_msg(sb, KERN_INFO, "nouser_xattr options not supported"); break; + case Opt_inline_xattr: + f2fs_msg(sb, KERN_INFO, + "inline_xattr options not supported"); + break; #endif #ifdef CONFIG_F2FS_FS_POSIX_ACL case Opt_noacl: @@ -180,6 +301,9 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb) set_inode_flag(fi, FI_NEW_INODE); + if (test_opt(F2FS_SB(sb), INLINE_XATTR)) + set_inode_flag(fi, FI_INLINE_XATTR); + return &fi->vfs_inode; } @@ -205,7 +329,6 @@ static int f2fs_drop_inode(struct inode *inode) static void f2fs_dirty_inode(struct inode *inode, int flags) { set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); - return; } static void f2fs_i_callback(struct rcu_head *head) @@ -223,6 +346,12 @@ static void f2fs_put_super(struct super_block *sb) { struct f2fs_sb_info *sbi = F2FS_SB(sb); + if (sbi->s_proc) { + remove_proc_entry("segment_info", sbi->s_proc); + remove_proc_entry(sb->s_id, f2fs_proc_root); + } + kobject_del(&sbi->s_kobj); + f2fs_destroy_stats(sbi); stop_gc_thread(sbi); @@ -236,6 +365,8 @@ static void f2fs_put_super(struct super_block *sb) destroy_segment_manager(sbi); kfree(sbi->ckpt); + kobject_put(&sbi->s_kobj); + wait_for_completion(&sbi->s_kobj_unregister); sb->s_fs_info = NULL; brelse(sbi->raw_super_buf); @@ -325,6 +456,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) seq_puts(seq, ",user_xattr"); else seq_puts(seq, ",nouser_xattr"); + if (test_opt(sbi, INLINE_XATTR)) + seq_puts(seq, ",inline_xattr"); #endif #ifdef CONFIG_F2FS_FS_POSIX_ACL if (test_opt(sbi, POSIX_ACL)) @@ -340,6 +473,36 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) return 0; } +static int segment_info_seq_show(struct seq_file *seq, void *offset) +{ + struct super_block *sb = seq->private; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + unsigned int total_segs = le32_to_cpu(sbi->raw_super->segment_count_main); + int i; + + for (i = 0; i < total_segs; i++) { + seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1)); + if (i != 0 && (i % 10) == 0) + seq_puts(seq, "\n"); + else + seq_puts(seq, " "); + } + return 0; +} + +static int segment_info_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, segment_info_seq_show, PDE_DATA(inode)); +} + +static const struct file_operations f2fs_seq_segment_info_fops = { + .owner = THIS_MODULE, + .open = segment_info_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static int f2fs_remount(struct super_block *sb, int *flags, char *data) { struct f2fs_sb_info *sbi = F2FS_SB(sb); @@ -455,7 +618,7 @@ static const struct export_operations f2fs_export_ops = { static loff_t max_file_size(unsigned bits) { - loff_t result = ADDRS_PER_INODE; + loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); loff_t leaf_count = ADDRS_PER_BLOCK; /* two direct node blocks */ @@ -766,6 +929,13 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent) if (err) goto fail; + if (f2fs_proc_root) + sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); + + if (sbi->s_proc) + proc_create_data("segment_info", S_IRUGO, sbi->s_proc, + &f2fs_seq_segment_info_fops, sb); + if (test_opt(sbi, DISCARD)) { struct request_queue *q = bdev_get_queue(sb->s_bdev); if (!blk_queue_discard(q)) @@ -774,6 +944,13 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent) "the device does not support discard"); } + sbi->s_kobj.kset = f2fs_kset; + init_completion(&sbi->s_kobj_unregister); + err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, + "%s", sb->s_id); + if (err) + goto fail; + return 0; fail: stop_gc_thread(sbi); @@ -841,29 +1018,49 @@ static int __init init_f2fs_fs(void) goto fail; err = create_node_manager_caches(); if (err) - goto fail; + goto free_inodecache; err = create_gc_caches(); if (err) - goto fail; + goto free_node_manager_caches; err = create_checkpoint_caches(); if (err) - goto fail; + goto free_gc_caches; + f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); + if (!f2fs_kset) { + err = -ENOMEM; + goto free_checkpoint_caches; + } err = register_filesystem(&f2fs_fs_type); if (err) - goto fail; + goto free_kset; f2fs_create_root_stats(); + f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); + return 0; + +free_kset: + kset_unregister(f2fs_kset); +free_checkpoint_caches: + destroy_checkpoint_caches(); +free_gc_caches: + destroy_gc_caches(); +free_node_manager_caches: + destroy_node_manager_caches(); +free_inodecache: + destroy_inodecache(); fail: return err; } static void __exit exit_f2fs_fs(void) { + remove_proc_entry("fs/f2fs", NULL); f2fs_destroy_root_stats(); unregister_filesystem(&f2fs_fs_type); destroy_checkpoint_caches(); destroy_gc_caches(); destroy_node_manager_caches(); destroy_inodecache(); + kset_unregister(f2fs_kset); } module_init(init_f2fs_fs) diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c index 3ab07ecd86ca..1ac8a5f6e380 100644 --- a/fs/f2fs/xattr.c +++ b/fs/f2fs/xattr.c @@ -246,40 +246,170 @@ static inline const struct xattr_handler *f2fs_xattr_handler(int name_index) return handler; } +static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int name_index, + size_t name_len, const char *name) +{ + struct f2fs_xattr_entry *entry; + + list_for_each_xattr(entry, base_addr) { + if (entry->e_name_index != name_index) + continue; + if (entry->e_name_len != name_len) + continue; + if (!memcmp(entry->e_name, name, name_len)) + break; + } + return entry; +} + +static void *read_all_xattrs(struct inode *inode, struct page *ipage) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_xattr_header *header; + size_t size = PAGE_SIZE, inline_size = 0; + void *txattr_addr; + + inline_size = inline_xattr_size(inode); + + txattr_addr = kzalloc(inline_size + size, GFP_KERNEL); + if (!txattr_addr) + return NULL; + + /* read from inline xattr */ + if (inline_size) { + struct page *page = NULL; + void *inline_addr; + + if (ipage) { + inline_addr = inline_xattr_addr(ipage); + } else { + page = get_node_page(sbi, inode->i_ino); + if (IS_ERR(page)) + goto fail; + inline_addr = inline_xattr_addr(page); + } + memcpy(txattr_addr, inline_addr, inline_size); + f2fs_put_page(page, 1); + } + + /* read from xattr node block */ + if (F2FS_I(inode)->i_xattr_nid) { + struct page *xpage; + void *xattr_addr; + + /* The inode already has an extended attribute block. */ + xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid); + if (IS_ERR(xpage)) + goto fail; + + xattr_addr = page_address(xpage); + memcpy(txattr_addr + inline_size, xattr_addr, PAGE_SIZE); + f2fs_put_page(xpage, 1); + } + + header = XATTR_HDR(txattr_addr); + + /* never been allocated xattrs */ + if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) { + header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC); + header->h_refcount = cpu_to_le32(1); + } + return txattr_addr; +fail: + kzfree(txattr_addr); + return NULL; +} + +static inline int write_all_xattrs(struct inode *inode, __u32 hsize, + void *txattr_addr, struct page *ipage) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + size_t inline_size = 0; + void *xattr_addr; + struct page *xpage; + nid_t new_nid = 0; + int err; + + inline_size = inline_xattr_size(inode); + + if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid) + if (!alloc_nid(sbi, &new_nid)) + return -ENOSPC; + + /* write to inline xattr */ + if (inline_size) { + struct page *page = NULL; + void *inline_addr; + + if (ipage) { + inline_addr = inline_xattr_addr(ipage); + } else { + page = get_node_page(sbi, inode->i_ino); + if (IS_ERR(page)) { + alloc_nid_failed(sbi, new_nid); + return PTR_ERR(page); + } + inline_addr = inline_xattr_addr(page); + } + memcpy(inline_addr, txattr_addr, inline_size); + f2fs_put_page(page, 1); + + /* no need to use xattr node block */ + if (hsize <= inline_size) { + err = truncate_xattr_node(inode, ipage); + alloc_nid_failed(sbi, new_nid); + return err; + } + } + + /* write to xattr node block */ + if (F2FS_I(inode)->i_xattr_nid) { + xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid); + if (IS_ERR(xpage)) { + alloc_nid_failed(sbi, new_nid); + return PTR_ERR(xpage); + } + BUG_ON(new_nid); + } else { + struct dnode_of_data dn; + set_new_dnode(&dn, inode, NULL, NULL, new_nid); + xpage = new_node_page(&dn, XATTR_NODE_OFFSET, ipage); + if (IS_ERR(xpage)) { + alloc_nid_failed(sbi, new_nid); + return PTR_ERR(xpage); + } + alloc_nid_done(sbi, new_nid); + } + + xattr_addr = page_address(xpage); + memcpy(xattr_addr, txattr_addr + inline_size, PAGE_SIZE - + sizeof(struct node_footer)); + set_page_dirty(xpage); + f2fs_put_page(xpage, 1); + + /* need to checkpoint during fsync */ + F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); + return 0; +} + int f2fs_getxattr(struct inode *inode, int name_index, const char *name, void *buffer, size_t buffer_size) { - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); - struct f2fs_inode_info *fi = F2FS_I(inode); struct f2fs_xattr_entry *entry; - struct page *page; void *base_addr; - int error = 0, found = 0; + int error = 0; size_t value_len, name_len; if (name == NULL) return -EINVAL; name_len = strlen(name); - if (!fi->i_xattr_nid) - return -ENODATA; + base_addr = read_all_xattrs(inode, NULL); + if (!base_addr) + return -ENOMEM; - page = get_node_page(sbi, fi->i_xattr_nid); - if (IS_ERR(page)) - return PTR_ERR(page); - base_addr = page_address(page); - - list_for_each_xattr(entry, base_addr) { - if (entry->e_name_index != name_index) - continue; - if (entry->e_name_len != name_len) - continue; - if (!memcmp(entry->e_name, name, name_len)) { - found = 1; - break; - } - } - if (!found) { + entry = __find_xattr(base_addr, name_index, name_len, name); + if (IS_XATTR_LAST_ENTRY(entry)) { error = -ENODATA; goto cleanup; } @@ -298,28 +428,21 @@ int f2fs_getxattr(struct inode *inode, int name_index, const char *name, error = value_len; cleanup: - f2fs_put_page(page, 1); + kzfree(base_addr); return error; } ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) { struct inode *inode = dentry->d_inode; - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); - struct f2fs_inode_info *fi = F2FS_I(inode); struct f2fs_xattr_entry *entry; - struct page *page; void *base_addr; int error = 0; size_t rest = buffer_size; - if (!fi->i_xattr_nid) - return 0; - - page = get_node_page(sbi, fi->i_xattr_nid); - if (IS_ERR(page)) - return PTR_ERR(page); - base_addr = page_address(page); + base_addr = read_all_xattrs(inode, NULL); + if (!base_addr) + return -ENOMEM; list_for_each_xattr(entry, base_addr) { const struct xattr_handler *handler = @@ -342,7 +465,7 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) } error = buffer_size - rest; cleanup: - f2fs_put_page(page, 1); + kzfree(base_addr); return error; } @@ -351,14 +474,13 @@ int f2fs_setxattr(struct inode *inode, int name_index, const char *name, { struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); struct f2fs_inode_info *fi = F2FS_I(inode); - struct f2fs_xattr_header *header = NULL; struct f2fs_xattr_entry *here, *last; - struct page *page; void *base_addr; - int error, found, free, newsize; + int found, newsize; size_t name_len; - char *pval; int ilock; + __u32 new_hsize; + int error = -ENOMEM; if (name == NULL) return -EINVAL; @@ -368,67 +490,21 @@ int f2fs_setxattr(struct inode *inode, int name_index, const char *name, name_len = strlen(name); - if (name_len > F2FS_NAME_LEN || value_len > MAX_VALUE_LEN) + if (name_len > F2FS_NAME_LEN || value_len > MAX_VALUE_LEN(inode)) return -ERANGE; f2fs_balance_fs(sbi); ilock = mutex_lock_op(sbi); - if (!fi->i_xattr_nid) { - /* Allocate new attribute block */ - struct dnode_of_data dn; - - if (!alloc_nid(sbi, &fi->i_xattr_nid)) { - error = -ENOSPC; - goto exit; - } - set_new_dnode(&dn, inode, NULL, NULL, fi->i_xattr_nid); - mark_inode_dirty(inode); - - page = new_node_page(&dn, XATTR_NODE_OFFSET, ipage); - if (IS_ERR(page)) { - alloc_nid_failed(sbi, fi->i_xattr_nid); - fi->i_xattr_nid = 0; - error = PTR_ERR(page); - goto exit; - } - - alloc_nid_done(sbi, fi->i_xattr_nid); - base_addr = page_address(page); - header = XATTR_HDR(base_addr); - header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC); - header->h_refcount = cpu_to_le32(1); - } else { - /* The inode already has an extended attribute block. */ - page = get_node_page(sbi, fi->i_xattr_nid); - if (IS_ERR(page)) { - error = PTR_ERR(page); - goto exit; - } - - base_addr = page_address(page); - header = XATTR_HDR(base_addr); - } - - if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) { - error = -EIO; - goto cleanup; - } + base_addr = read_all_xattrs(inode, ipage); + if (!base_addr) + goto exit; /* find entry with wanted name. */ - found = 0; - list_for_each_xattr(here, base_addr) { - if (here->e_name_index != name_index) - continue; - if (here->e_name_len != name_len) - continue; - if (!memcmp(here->e_name, name, name_len)) { - found = 1; - break; - } - } + here = __find_xattr(base_addr, name_index, name_len, name); + found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1; last = here; while (!IS_XATTR_LAST_ENTRY(last)) @@ -439,22 +515,25 @@ int f2fs_setxattr(struct inode *inode, int name_index, const char *name, /* 1. Check space */ if (value) { - /* If value is NULL, it is remove operation. + int free; + /* + * If value is NULL, it is remove operation. * In case of update operation, we caculate free. */ - free = MIN_OFFSET - ((char *)last - (char *)header); + free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr); if (found) free = free - ENTRY_SIZE(here); if (free < newsize) { error = -ENOSPC; - goto cleanup; + goto exit; } } /* 2. Remove old entry */ if (found) { - /* If entry is found, remove old entry. + /* + * If entry is found, remove old entry. * If not found, remove operation is not needed. */ struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here); @@ -465,10 +544,15 @@ int f2fs_setxattr(struct inode *inode, int name_index, const char *name, memset(last, 0, oldsize); } + new_hsize = (char *)last - (char *)base_addr; + /* 3. Write new entry */ if (value) { - /* Before we come here, old entry is removed. - * We just write new entry. */ + char *pval; + /* + * Before we come here, old entry is removed. + * We just write new entry. + */ memset(last, 0, newsize); last->e_name_index = name_index; last->e_name_len = name_len; @@ -476,26 +560,25 @@ int f2fs_setxattr(struct inode *inode, int name_index, const char *name, pval = last->e_name + name_len; memcpy(pval, value, value_len); last->e_value_size = cpu_to_le16(value_len); + new_hsize += newsize; } - set_page_dirty(page); - f2fs_put_page(page, 1); + error = write_all_xattrs(inode, new_hsize, base_addr, ipage); + if (error) + goto exit; if (is_inode_flag_set(fi, FI_ACL_MODE)) { inode->i_mode = fi->i_acl_mode; inode->i_ctime = CURRENT_TIME; clear_inode_flag(fi, FI_ACL_MODE); } + if (ipage) update_inode(inode, ipage); else update_inode_page(inode); - mutex_unlock_op(sbi, ilock); - - return 0; -cleanup: - f2fs_put_page(page, 1); exit: mutex_unlock_op(sbi, ilock); + kzfree(base_addr); return error; } diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h index 3c0817bef25d..02a08fb88a15 100644 --- a/fs/f2fs/xattr.h +++ b/fs/f2fs/xattr.h @@ -51,7 +51,7 @@ struct f2fs_xattr_entry { #define XATTR_HDR(ptr) ((struct f2fs_xattr_header *)(ptr)) #define XATTR_ENTRY(ptr) ((struct f2fs_xattr_entry *)(ptr)) -#define XATTR_FIRST_ENTRY(ptr) (XATTR_ENTRY(XATTR_HDR(ptr)+1)) +#define XATTR_FIRST_ENTRY(ptr) (XATTR_ENTRY(XATTR_HDR(ptr) + 1)) #define XATTR_ROUND (3) #define XATTR_ALIGN(size) ((size + XATTR_ROUND) & ~XATTR_ROUND) @@ -69,17 +69,16 @@ struct f2fs_xattr_entry { !IS_XATTR_LAST_ENTRY(entry);\ entry = XATTR_NEXT_ENTRY(entry)) +#define MIN_OFFSET(i) XATTR_ALIGN(inline_xattr_size(i) + PAGE_SIZE - \ + sizeof(struct node_footer) - sizeof(__u32)) -#define MIN_OFFSET XATTR_ALIGN(PAGE_SIZE - \ - sizeof(struct node_footer) - \ - sizeof(__u32)) - -#define MAX_VALUE_LEN (MIN_OFFSET - sizeof(struct f2fs_xattr_header) - \ - sizeof(struct f2fs_xattr_entry)) +#define MAX_VALUE_LEN(i) (MIN_OFFSET(i) - \ + sizeof(struct f2fs_xattr_header) - \ + sizeof(struct f2fs_xattr_entry)) /* * On-disk structure of f2fs_xattr - * We use only 1 block for xattr. + * We use inline xattrs space + 1 block for xattr. * * +--------------------+ * | f2fs_xattr_header | diff --git a/fs/file_table.c b/fs/file_table.c index b44e4c559786..322cd37626cb 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -385,6 +385,10 @@ static inline void __file_sb_list_add(struct file *file, struct super_block *sb) */ void file_sb_list_add(struct file *file, struct super_block *sb) { + if (likely(!(file->f_mode & FMODE_WRITE))) + return; + if (!S_ISREG(file_inode(file)->i_mode)) + return; lg_local_lock(&files_lglock); __file_sb_list_add(file, sb); lg_local_unlock(&files_lglock); @@ -450,8 +454,6 @@ void mark_files_ro(struct super_block *sb) lg_global_lock(&files_lglock); do_file_list_for_each_entry(sb, f) { - if (!S_ISREG(file_inode(f)->i_mode)) - continue; if (!file_count(f)) continue; if (!(f->f_mode & FMODE_WRITE)) diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c index 0e91a3c9fdb2..318e8433527c 100644 --- a/fs/fscache/cookie.c +++ b/fs/fscache/cookie.c @@ -558,3 +558,74 @@ void __fscache_cookie_put(struct fscache_cookie *cookie) _leave(""); } + +/* + * check the consistency between the netfs inode and the backing cache + * + * NOTE: it only serves no-index type + */ +int __fscache_check_consistency(struct fscache_cookie *cookie) +{ + struct fscache_operation *op; + struct fscache_object *object; + int ret; + + _enter("%p,", cookie); + + ASSERTCMP(cookie->def->type, ==, FSCACHE_COOKIE_TYPE_DATAFILE); + + if (fscache_wait_for_deferred_lookup(cookie) < 0) + return -ERESTARTSYS; + + if (hlist_empty(&cookie->backing_objects)) + return 0; + + op = kzalloc(sizeof(*op), GFP_NOIO | __GFP_NOMEMALLOC | __GFP_NORETRY); + if (!op) + return -ENOMEM; + + fscache_operation_init(op, NULL, NULL); + op->flags = FSCACHE_OP_MYTHREAD | + (1 << FSCACHE_OP_WAITING); + + spin_lock(&cookie->lock); + + if (hlist_empty(&cookie->backing_objects)) + goto inconsistent; + object = hlist_entry(cookie->backing_objects.first, + struct fscache_object, cookie_link); + if (test_bit(FSCACHE_IOERROR, &object->cache->flags)) + goto inconsistent; + + op->debug_id = atomic_inc_return(&fscache_op_debug_id); + + atomic_inc(&cookie->n_active); + if (fscache_submit_op(object, op) < 0) + goto submit_failed; + + /* the work queue now carries its own ref on the object */ + spin_unlock(&cookie->lock); + + ret = fscache_wait_for_operation_activation(object, op, + NULL, NULL, NULL); + if (ret == 0) { + /* ask the cache to honour the operation */ + ret = object->cache->ops->check_consistency(op); + fscache_op_complete(op, false); + } else if (ret == -ENOBUFS) { + ret = 0; + } + + fscache_put_operation(op); + _leave(" = %d", ret); + return ret; + +submit_failed: + atomic_dec(&cookie->n_active); +inconsistent: + spin_unlock(&cookie->lock); + kfree(op); + _leave(" = -ESTALE"); + return -ESTALE; +} +EXPORT_SYMBOL(__fscache_check_consistency); diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h index 12d505bedb5c..4226f6680b06 100644 --- a/fs/fscache/internal.h +++ b/fs/fscache/internal.h @@ -130,6 +130,12 @@ extern void fscache_operation_gc(struct work_struct *); /* * page.c */ +extern int fscache_wait_for_deferred_lookup(struct fscache_cookie *); +extern int fscache_wait_for_operation_activation(struct fscache_object *, + struct fscache_operation *, + atomic_t *, + atomic_t *, + void (*)(struct fscache_operation *)); extern void fscache_invalidate_writes(struct fscache_cookie *); /* diff --git a/fs/fscache/page.c b/fs/fscache/page.c index d479ab3c63e4..8702b732109a 100644 --- a/fs/fscache/page.c +++ b/fs/fscache/page.c @@ -278,7 +278,7 @@ static struct fscache_retrieval *fscache_alloc_retrieval( /* * wait for a deferred lookup to complete */ -static int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie) +int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie) { unsigned long jif; @@ -322,42 +322,46 @@ static void fscache_do_cancel_retrieval(struct fscache_operation *_op) /* * wait for an object to become active (or dead) */ -static int fscache_wait_for_retrieval_activation(struct fscache_object *object, - struct fscache_retrieval *op, - atomic_t *stat_op_waits, - atomic_t *stat_object_dead) +int fscache_wait_for_operation_activation(struct fscache_object *object, + struct fscache_operation *op, + atomic_t *stat_op_waits, + atomic_t *stat_object_dead, + void (*do_cancel)(struct fscache_operation *)) { int ret; - if (!test_bit(FSCACHE_OP_WAITING, &op->op.flags)) + if (!test_bit(FSCACHE_OP_WAITING, &op->flags)) goto check_if_dead; _debug(">>> WT"); - fscache_stat(stat_op_waits); - if (wait_on_bit(&op->op.flags, FSCACHE_OP_WAITING, + if (stat_op_waits) + fscache_stat(stat_op_waits); + if (wait_on_bit(&op->flags, FSCACHE_OP_WAITING, fscache_wait_bit_interruptible, TASK_INTERRUPTIBLE) != 0) { - ret = fscache_cancel_op(&op->op, fscache_do_cancel_retrieval); + ret = fscache_cancel_op(op, do_cancel); if (ret == 0) return -ERESTARTSYS; /* it's been removed from the pending queue by another party, * so we should get to run shortly */ - wait_on_bit(&op->op.flags, FSCACHE_OP_WAITING, + wait_on_bit(&op->flags, FSCACHE_OP_WAITING, fscache_wait_bit, TASK_UNINTERRUPTIBLE); } _debug("<<< GO"); check_if_dead: - if (op->op.state == FSCACHE_OP_ST_CANCELLED) { - fscache_stat(stat_object_dead); + if (op->state == FSCACHE_OP_ST_CANCELLED) { + if (stat_object_dead) + fscache_stat(stat_object_dead); _leave(" = -ENOBUFS [cancelled]"); return -ENOBUFS; } if (unlikely(fscache_object_is_dead(object))) { - pr_err("%s() = -ENOBUFS [obj dead %d]\n", __func__, op->op.state); - fscache_cancel_op(&op->op, fscache_do_cancel_retrieval); - fscache_stat(stat_object_dead); + pr_err("%s() = -ENOBUFS [obj dead %d]\n", __func__, op->state); + fscache_cancel_op(op, do_cancel); + if (stat_object_dead) + fscache_stat(stat_object_dead); return -ENOBUFS; } return 0; @@ -432,10 +436,11 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie, /* we wait for the operation to become active, and then process it * *here*, in this thread, and not in the thread pool */ - ret = fscache_wait_for_retrieval_activation( - object, op, + ret = fscache_wait_for_operation_activation( + object, &op->op, __fscache_stat(&fscache_n_retrieval_op_waits), - __fscache_stat(&fscache_n_retrievals_object_dead)); + __fscache_stat(&fscache_n_retrievals_object_dead), + fscache_do_cancel_retrieval); if (ret < 0) goto error; @@ -557,10 +562,11 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie, /* we wait for the operation to become active, and then process it * *here*, in this thread, and not in the thread pool */ - ret = fscache_wait_for_retrieval_activation( - object, op, + ret = fscache_wait_for_operation_activation( + object, &op->op, __fscache_stat(&fscache_n_retrieval_op_waits), - __fscache_stat(&fscache_n_retrievals_object_dead)); + __fscache_stat(&fscache_n_retrievals_object_dead), + fscache_do_cancel_retrieval); if (ret < 0) goto error; @@ -658,10 +664,11 @@ int __fscache_alloc_page(struct fscache_cookie *cookie, fscache_stat(&fscache_n_alloc_ops); - ret = fscache_wait_for_retrieval_activation( - object, op, + ret = fscache_wait_for_operation_activation( + object, &op->op, __fscache_stat(&fscache_n_alloc_op_waits), - __fscache_stat(&fscache_n_allocs_object_dead)); + __fscache_stat(&fscache_n_allocs_object_dead), + fscache_do_cancel_retrieval); if (ret < 0) goto error; @@ -694,6 +701,22 @@ nobufs: EXPORT_SYMBOL(__fscache_alloc_page); /* + * Unmark pages allocate in the readahead code path (via: + * fscache_readpages_or_alloc) after delegating to the base filesystem + */ +void __fscache_readpages_cancel(struct fscache_cookie *cookie, + struct list_head *pages) +{ + struct page *page; + + list_for_each_entry(page, pages, lru) { + if (PageFsCache(page)) + __fscache_uncache_page(cookie, page); + } +} +EXPORT_SYMBOL(__fscache_readpages_cancel); + +/* * release a write op reference */ static void fscache_release_write_op(struct fscache_operation *_op) diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c index aef34b1e635e..adbfd66b380f 100644 --- a/fs/fuse/cuse.c +++ b/fs/fuse/cuse.c @@ -568,6 +568,7 @@ static ssize_t cuse_class_waiting_show(struct device *dev, return sprintf(buf, "%d\n", atomic_read(&cc->fc.num_waiting)); } +static DEVICE_ATTR(waiting, S_IFREG | 0400, cuse_class_waiting_show, NULL); static ssize_t cuse_class_abort_store(struct device *dev, struct device_attribute *attr, @@ -578,12 +579,14 @@ static ssize_t cuse_class_abort_store(struct device *dev, fuse_abort_conn(&cc->fc); return count; } +static DEVICE_ATTR(abort, S_IFREG | 0200, NULL, cuse_class_abort_store); -static struct device_attribute cuse_class_dev_attrs[] = { - __ATTR(waiting, S_IFREG | 0400, cuse_class_waiting_show, NULL), - __ATTR(abort, S_IFREG | 0200, NULL, cuse_class_abort_store), - { } +static struct attribute *cuse_class_dev_attrs[] = { + &dev_attr_waiting.attr, + &dev_attr_abort.attr, + NULL, }; +ATTRIBUTE_GROUPS(cuse_class_dev); static struct miscdevice cuse_miscdev = { .minor = MISC_DYNAMIC_MINOR, @@ -609,7 +612,7 @@ static int __init cuse_init(void) if (IS_ERR(cuse_class)) return PTR_ERR(cuse_class); - cuse_class->dev_attrs = cuse_class_dev_attrs; + cuse_class->dev_groups = cuse_class_dev_groups; rc = misc_register(&cuse_miscdev); if (rc) { diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 72a5d5b04494..0e6961aae6c0 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -182,10 +182,11 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) struct inode *inode; struct dentry *parent; struct fuse_conn *fc; + int ret; inode = ACCESS_ONCE(entry->d_inode); if (inode && is_bad_inode(inode)) - return 0; + goto invalid; else if (fuse_dentry_time(entry) < get_jiffies_64()) { int err; struct fuse_entry_out outarg; @@ -195,20 +196,23 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) /* For negative dentries, always do a fresh lookup */ if (!inode) - return 0; + goto invalid; + ret = -ECHILD; if (flags & LOOKUP_RCU) - return -ECHILD; + goto out; fc = get_fuse_conn(inode); req = fuse_get_req_nopages(fc); + ret = PTR_ERR(req); if (IS_ERR(req)) - return 0; + goto out; forget = fuse_alloc_forget(); if (!forget) { fuse_put_request(fc, req); - return 0; + ret = -ENOMEM; + goto out; } attr_version = fuse_get_attr_version(fc); @@ -227,7 +231,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) struct fuse_inode *fi = get_fuse_inode(inode); if (outarg.nodeid != get_node_id(inode)) { fuse_queue_forget(fc, forget, outarg.nodeid, 1); - return 0; + goto invalid; } spin_lock(&fc->lock); fi->nlookup++; @@ -235,7 +239,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) } kfree(forget); if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT) - return 0; + goto invalid; fuse_change_attributes(inode, &outarg.attr, entry_attr_timeout(&outarg), @@ -249,7 +253,15 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) dput(parent); } } - return 1; + ret = 1; +out: + return ret; + +invalid: + ret = 0; + if (check_submounts_and_drop(entry) != 0) + ret = 1; + goto out; } static int invalid_nodeid(u64 nodeid) @@ -267,26 +279,6 @@ int fuse_valid_type(int m) S_ISBLK(m) || S_ISFIFO(m) || S_ISSOCK(m); } -/* - * Add a directory inode to a dentry, ensuring that no other dentry - * refers to this inode. Called with fc->inst_mutex. - */ -static struct dentry *fuse_d_add_directory(struct dentry *entry, - struct inode *inode) -{ - struct dentry *alias = d_find_alias(inode); - if (alias && !(alias->d_flags & DCACHE_DISCONNECTED)) { - /* This tries to shrink the subtree below alias */ - fuse_invalidate_entry(alias); - dput(alias); - if (!hlist_empty(&inode->i_dentry)) - return ERR_PTR(-EBUSY); - } else { - dput(alias); - } - return d_splice_alias(inode, entry); -} - int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, struct fuse_entry_out *outarg, struct inode **inode) { @@ -345,6 +337,24 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, return err; } +static struct dentry *fuse_materialise_dentry(struct dentry *dentry, + struct inode *inode) +{ + struct dentry *newent; + + if (inode && S_ISDIR(inode->i_mode)) { + struct fuse_conn *fc = get_fuse_conn(inode); + + mutex_lock(&fc->inst_mutex); + newent = d_materialise_unique(dentry, inode); + mutex_unlock(&fc->inst_mutex); + } else { + newent = d_materialise_unique(dentry, inode); + } + + return newent; +} + static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, unsigned int flags) { @@ -352,7 +362,6 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, struct fuse_entry_out outarg; struct inode *inode; struct dentry *newent; - struct fuse_conn *fc = get_fuse_conn(dir); bool outarg_valid = true; err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name, @@ -368,16 +377,10 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, if (inode && get_node_id(inode) == FUSE_ROOT_ID) goto out_iput; - if (inode && S_ISDIR(inode->i_mode)) { - mutex_lock(&fc->inst_mutex); - newent = fuse_d_add_directory(entry, inode); - mutex_unlock(&fc->inst_mutex); - err = PTR_ERR(newent); - if (IS_ERR(newent)) - goto out_iput; - } else { - newent = d_splice_alias(inode, entry); - } + newent = fuse_materialise_dentry(entry, inode); + err = PTR_ERR(newent); + if (IS_ERR(newent)) + goto out_err; entry = newent ? newent : entry; if (outarg_valid) @@ -1275,18 +1278,10 @@ static int fuse_direntplus_link(struct file *file, if (!inode) goto out; - if (S_ISDIR(inode->i_mode)) { - mutex_lock(&fc->inst_mutex); - alias = fuse_d_add_directory(dentry, inode); - mutex_unlock(&fc->inst_mutex); - err = PTR_ERR(alias); - if (IS_ERR(alias)) { - iput(inode); - goto out; - } - } else { - alias = d_splice_alias(inode, dentry); - } + alias = fuse_materialise_dentry(dentry, inode); + err = PTR_ERR(alias); + if (IS_ERR(alias)) + goto out; if (alias) { dput(dentry); diff --git a/fs/gfs2/dentry.c b/fs/gfs2/dentry.c index f2448ab2aac5..d3a5d4e29ba5 100644 --- a/fs/gfs2/dentry.c +++ b/fs/gfs2/dentry.c @@ -93,12 +93,9 @@ invalid_gunlock: if (!had_lock) gfs2_glock_dq_uninit(&d_gh); invalid: - if (inode && S_ISDIR(inode->i_mode)) { - if (have_submounts(dentry)) - goto valid; - shrink_dcache_parent(dentry); - } - d_drop(dentry); + if (check_submounts_and_drop(dentry) != 0) + goto valid; + dput(parent); return 0; diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c index 0cb4c1557f20..2e5fc268d324 100644 --- a/fs/gfs2/dir.c +++ b/fs/gfs2/dir.c @@ -1859,7 +1859,7 @@ static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len, memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); - ht = kzalloc(size, GFP_NOFS); + ht = kzalloc(size, GFP_NOFS | __GFP_NOWARN); if (ht == NULL) ht = vzalloc(size); if (!ht) diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index cddb05217512..25437280a207 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -361,6 +361,13 @@ retry: return 0; } +static int hostfs_file_release(struct inode *inode, struct file *file) +{ + filemap_write_and_wait(inode->i_mapping); + + return 0; +} + int hostfs_fsync(struct file *file, loff_t start, loff_t end, int datasync) { struct inode *inode = file->f_mapping->host; @@ -386,7 +393,7 @@ static const struct file_operations hostfs_file_fops = { .write = do_sync_write, .mmap = generic_file_mmap, .open = hostfs_file_open, - .release = NULL, + .release = hostfs_file_release, .fsync = hostfs_fsync, }; diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 34423978b170..d19b30ababf1 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -926,14 +926,8 @@ static int get_hstate_idx(int page_size_log) return h - hstates; } -static char *hugetlb_dname(struct dentry *dentry, char *buffer, int buflen) -{ - return dynamic_dname(dentry, buffer, buflen, "/%s (deleted)", - dentry->d_name.name); -} - static struct dentry_operations anon_ops = { - .d_dname = hugetlb_dname + .d_dname = simple_dname }; /* diff --git a/fs/inode.c b/fs/inode.c index d6dfb09c8280..93a0625b46e4 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -1525,7 +1525,7 @@ static int update_time(struct inode *inode, struct timespec *time, int flags) * This function automatically handles read only file systems and media, * as well as the "noatime" flag and inode specific "noatime" markers. */ -void touch_atime(struct path *path) +void touch_atime(const struct path *path) { struct vfsmount *mnt = path->mnt; struct inode *inode = path->dentry->d_inode; diff --git a/fs/internal.h b/fs/internal.h index 7c5f01cf619d..d20893795526 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -126,6 +126,7 @@ extern int invalidate_inodes(struct super_block *, bool); * dcache.c */ extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); +extern int d_set_mounted(struct dentry *dentry); /* * read_write.c diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c index c348d6d88624..e5d408a7ea4a 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -117,8 +117,8 @@ static void destroy_inodecache(void) static int isofs_remount(struct super_block *sb, int *flags, char *data) { - /* we probably want a lot more here */ - *flags |= MS_RDONLY; + if (!(*flags & MS_RDONLY)) + return -EROFS; return 0; } @@ -763,15 +763,6 @@ root_found: */ s->s_maxbytes = 0x80000000000LL; - /* - * The CDROM is read-only, has no nodes (devices) on it, and since - * all of the files appear to be owned by root, we really do not want - * to allow suid. (suid or devices will not show up unless we have - * Rock Ridge extensions) - */ - - s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */; - /* Set this for reference. Its not currently used except on write which we don't have .. */ @@ -1530,6 +1521,9 @@ struct inode *isofs_iget(struct super_block *sb, static struct dentry *isofs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { + /* We don't support read-write mounts */ + if (!(flags & MS_RDONLY)) + return ERR_PTR(-EACCES); return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super); } diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c index 11bb11f48b3a..bb217dcb41af 100644 --- a/fs/jbd/commit.c +++ b/fs/jbd/commit.c @@ -340,13 +340,13 @@ void journal_commit_transaction(journal_t *journal) J_ASSERT(journal->j_committing_transaction == NULL); commit_transaction = journal->j_running_transaction; - J_ASSERT(commit_transaction->t_state == T_RUNNING); trace_jbd_start_commit(journal, commit_transaction); jbd_debug(1, "JBD: starting commit of transaction %d\n", commit_transaction->t_tid); spin_lock(&journal->j_state_lock); + J_ASSERT(commit_transaction->t_state == T_RUNNING); commit_transaction->t_state = T_LOCKED; trace_jbd_commit_locking(journal, commit_transaction); diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c index 6510d6355729..2d04f9afafd7 100644 --- a/fs/jbd/journal.c +++ b/fs/jbd/journal.c @@ -90,6 +90,24 @@ static int journal_convert_superblock_v1(journal_t *, journal_superblock_t *); static void __journal_abort_soft (journal_t *journal, int errno); static const char *journal_dev_name(journal_t *journal, char *buffer); +#ifdef CONFIG_JBD_DEBUG +void __jbd_debug(int level, const char *file, const char *func, + unsigned int line, const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + + if (level > journal_enable_debug) + return; + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + printk(KERN_DEBUG "%s: (%s, %u): %pV\n", file, func, line, &vaf); + va_end(args); +} +EXPORT_SYMBOL(__jbd_debug); +#endif + /* * Helper function used to manage commit timeouts */ diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index 559bec1a37b4..cf2fc0594063 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -343,14 +343,14 @@ static void jbd2_block_tag_csum_set(journal_t *j, journal_block_tag_t *tag, struct page *page = bh->b_page; __u8 *addr; __u32 csum32; + __be32 seq; if (!JBD2_HAS_INCOMPAT_FEATURE(j, JBD2_FEATURE_INCOMPAT_CSUM_V2)) return; - sequence = cpu_to_be32(sequence); + seq = cpu_to_be32(sequence); addr = kmap_atomic(page); - csum32 = jbd2_chksum(j, j->j_csum_seed, (__u8 *)&sequence, - sizeof(sequence)); + csum32 = jbd2_chksum(j, j->j_csum_seed, (__u8 *)&seq, sizeof(seq)); csum32 = jbd2_chksum(j, csum32, addr + offset_in_page(bh->b_data), bh->b_size); kunmap_atomic(addr); diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 02c7ad9d7a41..52032647dd4a 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -130,9 +130,10 @@ int jbd2_verify_csum_type(journal_t *j, journal_superblock_t *sb) return sb->s_checksum_type == JBD2_CRC32C_CHKSUM; } -static __u32 jbd2_superblock_csum(journal_t *j, journal_superblock_t *sb) +static __be32 jbd2_superblock_csum(journal_t *j, journal_superblock_t *sb) { - __u32 csum, old_csum; + __u32 csum; + __be32 old_csum; old_csum = sb->s_checksum; sb->s_checksum = 0; diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c index d4851464b57e..3929c50428b1 100644 --- a/fs/jbd2/recovery.c +++ b/fs/jbd2/recovery.c @@ -178,7 +178,8 @@ static int jbd2_descr_block_csum_verify(journal_t *j, void *buf) { struct jbd2_journal_block_tail *tail; - __u32 provided, calculated; + __be32 provided; + __u32 calculated; if (!JBD2_HAS_INCOMPAT_FEATURE(j, JBD2_FEATURE_INCOMPAT_CSUM_V2)) return 1; @@ -190,8 +191,7 @@ static int jbd2_descr_block_csum_verify(journal_t *j, calculated = jbd2_chksum(j, j->j_csum_seed, buf, j->j_blocksize); tail->t_checksum = provided; - provided = be32_to_cpu(provided); - return provided == calculated; + return provided == cpu_to_be32(calculated); } /* @@ -381,7 +381,8 @@ static int calc_chksums(journal_t *journal, struct buffer_head *bh, static int jbd2_commit_block_csum_verify(journal_t *j, void *buf) { struct commit_header *h; - __u32 provided, calculated; + __be32 provided; + __u32 calculated; if (!JBD2_HAS_INCOMPAT_FEATURE(j, JBD2_FEATURE_INCOMPAT_CSUM_V2)) return 1; @@ -392,21 +393,20 @@ static int jbd2_commit_block_csum_verify(journal_t *j, void *buf) calculated = jbd2_chksum(j, j->j_csum_seed, buf, j->j_blocksize); h->h_chksum[0] = provided; - provided = be32_to_cpu(provided); - return provided == calculated; + return provided == cpu_to_be32(calculated); } static int jbd2_block_tag_csum_verify(journal_t *j, journal_block_tag_t *tag, void *buf, __u32 sequence) { __u32 csum32; + __be32 seq; if (!JBD2_HAS_INCOMPAT_FEATURE(j, JBD2_FEATURE_INCOMPAT_CSUM_V2)) return 1; - sequence = cpu_to_be32(sequence); - csum32 = jbd2_chksum(j, j->j_csum_seed, (__u8 *)&sequence, - sizeof(sequence)); + seq = cpu_to_be32(sequence); + csum32 = jbd2_chksum(j, j->j_csum_seed, (__u8 *)&seq, sizeof(seq)); csum32 = jbd2_chksum(j, csum32, buf, j->j_blocksize); return tag->t_checksum == cpu_to_be16(csum32); @@ -808,7 +808,8 @@ static int jbd2_revoke_block_csum_verify(journal_t *j, void *buf) { struct jbd2_journal_revoke_tail *tail; - __u32 provided, calculated; + __be32 provided; + __u32 calculated; if (!JBD2_HAS_INCOMPAT_FEATURE(j, JBD2_FEATURE_INCOMPAT_CSUM_V2)) return 1; @@ -820,8 +821,7 @@ static int jbd2_revoke_block_csum_verify(journal_t *j, calculated = jbd2_chksum(j, j->j_csum_seed, buf, j->j_blocksize); tail->r_checksum = provided; - provided = be32_to_cpu(provided); - return provided == calculated; + return provided == cpu_to_be32(calculated); } /* Scan a revoke record, marking all blocks mentioned as revoked. */ diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c index 8743ba9c6742..984c2bbf4f61 100644 --- a/fs/jfs/jfs_dtree.c +++ b/fs/jfs/jfs_dtree.c @@ -3047,6 +3047,14 @@ int jfs_readdir(struct file *file, struct dir_context *ctx) dir_index = (u32) ctx->pos; + /* + * NFSv4 reserves cookies 1 and 2 for . and .. so the value + * we return to the vfs is one greater than the one we use + * internally. + */ + if (dir_index) + dir_index--; + if (dir_index > 1) { struct dir_table_slot dirtab_slot; @@ -3086,7 +3094,7 @@ int jfs_readdir(struct file *file, struct dir_context *ctx) if (p->header.flag & BT_INTERNAL) { jfs_err("jfs_readdir: bad index table"); DT_PUTPAGE(mp); - ctx->pos = -1; + ctx->pos = DIREND; return 0; } } else { @@ -3094,14 +3102,14 @@ int jfs_readdir(struct file *file, struct dir_context *ctx) /* * self "." */ - ctx->pos = 0; + ctx->pos = 1; if (!dir_emit(ctx, ".", 1, ip->i_ino, DT_DIR)) return 0; } /* * parent ".." */ - ctx->pos = 1; + ctx->pos = 2; if (!dir_emit(ctx, "..", 2, PARENT(ip), DT_DIR)) return 0; @@ -3122,22 +3130,23 @@ int jfs_readdir(struct file *file, struct dir_context *ctx) /* * Legacy filesystem - OS/2 & Linux JFS < 0.3.6 * - * pn = index = 0: First entry "." - * pn = 0; index = 1: Second entry ".." + * pn = 0; index = 1: First entry "." + * pn = 0; index = 2: Second entry ".." * pn > 0: Real entries, pn=1 -> leftmost page * pn = index = -1: No more entries */ dtpos = ctx->pos; - if (dtpos == 0) { + if (dtpos < 2) { /* build "." entry */ + ctx->pos = 1; if (!dir_emit(ctx, ".", 1, ip->i_ino, DT_DIR)) return 0; - dtoffset->index = 1; + dtoffset->index = 2; ctx->pos = dtpos; } if (dtoffset->pn == 0) { - if (dtoffset->index == 1) { + if (dtoffset->index == 2) { /* build ".." entry */ if (!dir_emit(ctx, "..", 2, PARENT(ip), DT_DIR)) return 0; @@ -3228,6 +3237,12 @@ int jfs_readdir(struct file *file, struct dir_context *ctx) } jfs_dirent->position = unique_pos++; } + /* + * We add 1 to the index because we may + * use a value of 2 internally, and NFSv4 + * doesn't like that. + */ + jfs_dirent->position++; } else { jfs_dirent->position = dtpos; len = min(d_namleft, DTLHDRDATALEN_LEGACY); diff --git a/fs/namei.c b/fs/namei.c index 89a612e392eb..56e4f4d537d0 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -508,56 +508,75 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry) { struct fs_struct *fs = current->fs; struct dentry *parent = nd->path.dentry; - int want_root = 0; BUG_ON(!(nd->flags & LOOKUP_RCU)); - if (nd->root.mnt && !(nd->flags & LOOKUP_ROOT)) { - want_root = 1; - spin_lock(&fs->lock); - if (nd->root.mnt != fs->root.mnt || - nd->root.dentry != fs->root.dentry) - goto err_root; - } - spin_lock(&parent->d_lock); + + /* + * Get a reference to the parent first: we're + * going to make "path_put(nd->path)" valid in + * non-RCU context for "terminate_walk()". + * + * If this doesn't work, return immediately with + * RCU walking still active (and then we will do + * the RCU walk cleanup in terminate_walk()). + */ + if (!lockref_get_not_dead(&parent->d_lockref)) + return -ECHILD; + + /* + * After the mntget(), we terminate_walk() will do + * the right thing for non-RCU mode, and all our + * subsequent exit cases should unlock_rcu_walk() + * before returning. + */ + mntget(nd->path.mnt); + nd->flags &= ~LOOKUP_RCU; + + /* + * For a negative lookup, the lookup sequence point is the parents + * sequence point, and it only needs to revalidate the parent dentry. + * + * For a positive lookup, we need to move both the parent and the + * dentry from the RCU domain to be properly refcounted. And the + * sequence number in the dentry validates *both* dentry counters, + * since we checked the sequence number of the parent after we got + * the child sequence number. So we know the parent must still + * be valid if the child sequence number is still valid. + */ if (!dentry) { - if (!__d_rcu_to_refcount(parent, nd->seq)) - goto err_parent; + if (read_seqcount_retry(&parent->d_seq, nd->seq)) + goto out; BUG_ON(nd->inode != parent->d_inode); } else { - if (dentry->d_parent != parent) - goto err_parent; - spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); - if (!__d_rcu_to_refcount(dentry, nd->seq)) - goto err_child; - /* - * If the sequence check on the child dentry passed, then - * the child has not been removed from its parent. This - * means the parent dentry must be valid and able to take - * a reference at this point. - */ - BUG_ON(!IS_ROOT(dentry) && dentry->d_parent != parent); - BUG_ON(!parent->d_count); - parent->d_count++; - spin_unlock(&dentry->d_lock); + if (!lockref_get_not_dead(&dentry->d_lockref)) + goto out; + if (read_seqcount_retry(&dentry->d_seq, nd->seq)) + goto drop_dentry; } - spin_unlock(&parent->d_lock); - if (want_root) { + + /* + * Sequence counts matched. Now make sure that the root is + * still valid and get it if required. + */ + if (nd->root.mnt && !(nd->flags & LOOKUP_ROOT)) { + spin_lock(&fs->lock); + if (nd->root.mnt != fs->root.mnt || nd->root.dentry != fs->root.dentry) + goto unlock_and_drop_dentry; path_get(&nd->root); spin_unlock(&fs->lock); } - mntget(nd->path.mnt); unlock_rcu_walk(); - nd->flags &= ~LOOKUP_RCU; return 0; -err_child: - spin_unlock(&dentry->d_lock); -err_parent: - spin_unlock(&parent->d_lock); -err_root: - if (want_root) - spin_unlock(&fs->lock); +unlock_and_drop_dentry: + spin_unlock(&fs->lock); +drop_dentry: + unlock_rcu_walk(); + dput(dentry); + return -ECHILD; +out: + unlock_rcu_walk(); return -ECHILD; } @@ -585,14 +604,16 @@ static int complete_walk(struct nameidata *nd) nd->flags &= ~LOOKUP_RCU; if (!(nd->flags & LOOKUP_ROOT)) nd->root.mnt = NULL; - spin_lock(&dentry->d_lock); - if (unlikely(!__d_rcu_to_refcount(dentry, nd->seq))) { - spin_unlock(&dentry->d_lock); + + if (unlikely(!lockref_get_not_dead(&dentry->d_lockref))) { + unlock_rcu_walk(); + return -ECHILD; + } + if (read_seqcount_retry(&dentry->d_seq, nd->seq)) { unlock_rcu_walk(); + dput(dentry); return -ECHILD; } - BUG_ON(nd->inode != dentry->d_inode); - spin_unlock(&dentry->d_lock); mntget(nd->path.mnt); unlock_rcu_walk(); } @@ -2184,6 +2205,188 @@ user_path_parent(int dfd, const char __user *path, struct nameidata *nd, return s; } +/** + * umount_lookup_last - look up last component for umount + * @nd: pathwalk nameidata - currently pointing at parent directory of "last" + * @path: pointer to container for result + * + * This is a special lookup_last function just for umount. In this case, we + * need to resolve the path without doing any revalidation. + * + * The nameidata should be the result of doing a LOOKUP_PARENT pathwalk. Since + * mountpoints are always pinned in the dcache, their ancestors are too. Thus, + * in almost all cases, this lookup will be served out of the dcache. The only + * cases where it won't are if nd->last refers to a symlink or the path is + * bogus and it doesn't exist. + * + * Returns: + * -error: if there was an error during lookup. This includes -ENOENT if the + * lookup found a negative dentry. The nd->path reference will also be + * put in this case. + * + * 0: if we successfully resolved nd->path and found it to not to be a + * symlink that needs to be followed. "path" will also be populated. + * The nd->path reference will also be put. + * + * 1: if we successfully resolved nd->last and found it to be a symlink + * that needs to be followed. "path" will be populated with the path + * to the link, and nd->path will *not* be put. + */ +static int +umount_lookup_last(struct nameidata *nd, struct path *path) +{ + int error = 0; + struct dentry *dentry; + struct dentry *dir = nd->path.dentry; + + if (unlikely(nd->flags & LOOKUP_RCU)) { + WARN_ON_ONCE(1); + error = -ECHILD; + goto error_check; + } + + nd->flags &= ~LOOKUP_PARENT; + + if (unlikely(nd->last_type != LAST_NORM)) { + error = handle_dots(nd, nd->last_type); + if (!error) + dentry = dget(nd->path.dentry); + goto error_check; + } + + mutex_lock(&dir->d_inode->i_mutex); + dentry = d_lookup(dir, &nd->last); + if (!dentry) { + /* + * No cached dentry. Mounted dentries are pinned in the cache, + * so that means that this dentry is probably a symlink or the + * path doesn't actually point to a mounted dentry. + */ + dentry = d_alloc(dir, &nd->last); + if (!dentry) { + error = -ENOMEM; + } else { + dentry = lookup_real(dir->d_inode, dentry, nd->flags); + if (IS_ERR(dentry)) + error = PTR_ERR(dentry); + } + } + mutex_unlock(&dir->d_inode->i_mutex); + +error_check: + if (!error) { + if (!dentry->d_inode) { + error = -ENOENT; + dput(dentry); + } else { + path->dentry = dentry; + path->mnt = mntget(nd->path.mnt); + if (should_follow_link(dentry->d_inode, + nd->flags & LOOKUP_FOLLOW)) + return 1; + follow_mount(path); + } + } + terminate_walk(nd); + return error; +} + +/** + * path_umountat - look up a path to be umounted + * @dfd: directory file descriptor to start walk from + * @name: full pathname to walk + * @flags: lookup flags + * @nd: pathwalk nameidata + * + * Look up the given name, but don't attempt to revalidate the last component. + * Returns 0 and "path" will be valid on success; Retuns error otherwise. + */ +static int +path_umountat(int dfd, const char *name, struct path *path, unsigned int flags) +{ + struct file *base = NULL; + struct nameidata nd; + int err; + + err = path_init(dfd, name, flags | LOOKUP_PARENT, &nd, &base); + if (unlikely(err)) + return err; + + current->total_link_count = 0; + err = link_path_walk(name, &nd); + if (err) + goto out; + + /* If we're in rcuwalk, drop out of it to handle last component */ + if (nd.flags & LOOKUP_RCU) { + err = unlazy_walk(&nd, NULL); + if (err) { + terminate_walk(&nd); + goto out; + } + } + + err = umount_lookup_last(&nd, path); + while (err > 0) { + void *cookie; + struct path link = *path; + err = may_follow_link(&link, &nd); + if (unlikely(err)) + break; + nd.flags |= LOOKUP_PARENT; + err = follow_link(&link, &nd, &cookie); + if (err) + break; + err = umount_lookup_last(&nd, path); + put_link(&nd, &link, cookie); + } +out: + if (base) + fput(base); + + if (nd.root.mnt && !(nd.flags & LOOKUP_ROOT)) + path_put(&nd.root); + + return err; +} + +/** + * user_path_umountat - lookup a path from userland in order to umount it + * @dfd: directory file descriptor + * @name: pathname from userland + * @flags: lookup flags + * @path: pointer to container to hold result + * + * A umount is a special case for path walking. We're not actually interested + * in the inode in this situation, and ESTALE errors can be a problem. We + * simply want track down the dentry and vfsmount attached at the mountpoint + * and avoid revalidating the last component. + * + * Returns 0 and populates "path" on success. + */ +int +user_path_umountat(int dfd, const char __user *name, unsigned int flags, + struct path *path) +{ + struct filename *s = getname(name); + int error; + + if (IS_ERR(s)) + return PTR_ERR(s); + + error = path_umountat(dfd, s->name, path, flags | LOOKUP_RCU); + if (unlikely(error == -ECHILD)) + error = path_umountat(dfd, s->name, path, flags); + if (unlikely(error == -ESTALE)) + error = path_umountat(dfd, s->name, path, flags | LOOKUP_REVAL); + + if (likely(!error)) + audit_inode(s, path->dentry, 0); + + putname(s); + return error; +} + /* * It's inline, so penalty for filesystems that don't use sticky bit is * minimal. @@ -3327,7 +3530,7 @@ void dentry_unhash(struct dentry *dentry) { shrink_dcache_parent(dentry); spin_lock(&dentry->d_lock); - if (dentry->d_count == 1) + if (dentry->d_lockref.count == 1) __d_drop(dentry); spin_unlock(&dentry->d_lock); } @@ -3671,11 +3874,15 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname, if ((flags & ~(AT_SYMLINK_FOLLOW | AT_EMPTY_PATH)) != 0) return -EINVAL; /* - * Using empty names is equivalent to using AT_SYMLINK_FOLLOW - * on /proc/self/fd/<fd>. + * To use null names we require CAP_DAC_READ_SEARCH + * This ensures that not everyone will be able to create + * handlink using the passed filedescriptor. */ - if (flags & AT_EMPTY_PATH) + if (flags & AT_EMPTY_PATH) { + if (!capable(CAP_DAC_READ_SEARCH)) + return -ENOENT; how = LOOKUP_EMPTY; + } if (flags & AT_SYMLINK_FOLLOW) how |= LOOKUP_FOLLOW; diff --git a/fs/namespace.c b/fs/namespace.c index 7b1ca9ba0b0a..fc2b5226278d 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -611,6 +611,7 @@ static struct mountpoint *new_mountpoint(struct dentry *dentry) { struct list_head *chain = mountpoint_hashtable + hash(NULL, dentry); struct mountpoint *mp; + int ret; list_for_each_entry(mp, chain, m_hash) { if (mp->m_dentry == dentry) { @@ -626,14 +627,12 @@ static struct mountpoint *new_mountpoint(struct dentry *dentry) if (!mp) return ERR_PTR(-ENOMEM); - spin_lock(&dentry->d_lock); - if (d_unlinked(dentry)) { - spin_unlock(&dentry->d_lock); + ret = d_set_mounted(dentry); + if (ret) { kfree(mp); - return ERR_PTR(-ENOENT); + return ERR_PTR(ret); } - dentry->d_flags |= DCACHE_MOUNTED; - spin_unlock(&dentry->d_lock); + mp->m_dentry = dentry; mp->m_count = 1; list_add(&mp->m_hash, chain); @@ -831,6 +830,10 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root, if ((flag & CL_UNPRIVILEGED) && (mnt->mnt.mnt_flags & MNT_READONLY)) mnt->mnt.mnt_flags |= MNT_LOCK_READONLY; + /* Don't allow unprivileged users to reveal what is under a mount */ + if ((flag & CL_UNPRIVILEGED) && list_empty(&old->mnt_expire)) + mnt->mnt.mnt_flags |= MNT_LOCKED; + atomic_inc(&sb->s_active); mnt->mnt.mnt_sb = sb; mnt->mnt.mnt_root = dget(root); @@ -1318,7 +1321,7 @@ SYSCALL_DEFINE2(umount, char __user *, name, int, flags) if (!(flags & UMOUNT_NOFOLLOW)) lookup_flags |= LOOKUP_FOLLOW; - retval = user_path_at(AT_FDCWD, name, lookup_flags, &path); + retval = user_path_umountat(AT_FDCWD, name, lookup_flags, &path); if (retval) goto out; mnt = real_mount(path.mnt); @@ -1327,6 +1330,8 @@ SYSCALL_DEFINE2(umount, char __user *, name, int, flags) goto dput_and_out; if (!check_mnt(mnt)) goto dput_and_out; + if (mnt->mnt.mnt_flags & MNT_LOCKED) + goto dput_and_out; retval = do_umount(mnt, flags); dput_and_out: @@ -1349,14 +1354,11 @@ SYSCALL_DEFINE1(oldumount, char __user *, name) #endif -static bool mnt_ns_loop(struct path *path) +static bool is_mnt_ns_file(struct dentry *dentry) { - /* Could bind mounting the mount namespace inode cause a - * mount namespace loop? - */ - struct inode *inode = path->dentry->d_inode; + /* Is this a proxy for a mount namespace? */ + struct inode *inode = dentry->d_inode; struct proc_ns *ei; - struct mnt_namespace *mnt_ns; if (!proc_ns_inode(inode)) return false; @@ -1365,7 +1367,19 @@ static bool mnt_ns_loop(struct path *path) if (ei->ns_ops != &mntns_operations) return false; - mnt_ns = ei->ns; + return true; +} + +static bool mnt_ns_loop(struct dentry *dentry) +{ + /* Could bind mounting the mount namespace inode cause a + * mount namespace loop? + */ + struct mnt_namespace *mnt_ns; + if (!is_mnt_ns_file(dentry)) + return false; + + mnt_ns = get_proc_ns(dentry->d_inode)->ns; return current->nsproxy->mnt_ns->seq >= mnt_ns->seq; } @@ -1374,13 +1388,17 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry, { struct mount *res, *p, *q, *r, *parent; - if (!(flag & CL_COPY_ALL) && IS_MNT_UNBINDABLE(mnt)) + if (!(flag & CL_COPY_UNBINDABLE) && IS_MNT_UNBINDABLE(mnt)) + return ERR_PTR(-EINVAL); + + if (!(flag & CL_COPY_MNT_NS_FILE) && is_mnt_ns_file(dentry)) return ERR_PTR(-EINVAL); res = q = clone_mnt(mnt, dentry, flag); if (IS_ERR(q)) return q; + q->mnt.mnt_flags &= ~MNT_LOCKED; q->mnt_mountpoint = mnt->mnt_mountpoint; p = mnt; @@ -1390,7 +1408,13 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry, continue; for (s = r; s; s = next_mnt(s, r)) { - if (!(flag & CL_COPY_ALL) && IS_MNT_UNBINDABLE(s)) { + if (!(flag & CL_COPY_UNBINDABLE) && + IS_MNT_UNBINDABLE(s)) { + s = skip_mnt_tree(s); + continue; + } + if (!(flag & CL_COPY_MNT_NS_FILE) && + is_mnt_ns_file(s->mnt.mnt_root)) { s = skip_mnt_tree(s); continue; } @@ -1429,7 +1453,7 @@ struct vfsmount *collect_mounts(struct path *path) CL_COPY_ALL | CL_PRIVATE); namespace_unlock(); if (IS_ERR(tree)) - return NULL; + return ERR_CAST(tree); return &tree->mnt; } @@ -1696,6 +1720,19 @@ static int do_change_type(struct path *path, int flag) return err; } +static bool has_locked_children(struct mount *mnt, struct dentry *dentry) +{ + struct mount *child; + list_for_each_entry(child, &mnt->mnt_mounts, mnt_child) { + if (!is_subdir(child->mnt_mountpoint, dentry)) + continue; + + if (child->mnt.mnt_flags & MNT_LOCKED) + return true; + } + return false; +} + /* * do loopback mount. */ @@ -1713,7 +1750,7 @@ static int do_loopback(struct path *path, const char *old_name, return err; err = -EINVAL; - if (mnt_ns_loop(&old_path)) + if (mnt_ns_loop(old_path.dentry)) goto out; mp = lock_mount(path); @@ -1731,8 +1768,11 @@ static int do_loopback(struct path *path, const char *old_name, if (!check_mnt(parent) || !check_mnt(old)) goto out2; + if (!recurse && has_locked_children(old, old_path.dentry)) + goto out2; + if (recurse) - mnt = copy_tree(old, old_path.dentry, 0); + mnt = copy_tree(old, old_path.dentry, CL_COPY_MNT_NS_FILE); else mnt = clone_mnt(old, old_path.dentry, 0); @@ -1741,6 +1781,8 @@ static int do_loopback(struct path *path, const char *old_name, goto out2; } + mnt->mnt.mnt_flags &= ~MNT_LOCKED; + err = graft_tree(mnt, parent, mp); if (err) { br_write_lock(&vfsmount_lock); @@ -1853,6 +1895,9 @@ static int do_move_mount(struct path *path, const char *old_name) if (!check_mnt(p) || !check_mnt(old)) goto out1; + if (old->mnt.mnt_flags & MNT_LOCKED) + goto out1; + err = -EINVAL; if (old_path.dentry != old_path.mnt->mnt_root) goto out1; @@ -2389,7 +2434,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns, namespace_lock(); /* First pass: copy the tree topology */ - copy_flags = CL_COPY_ALL | CL_EXPIRE; + copy_flags = CL_COPY_UNBINDABLE | CL_EXPIRE; if (user_ns != mnt_ns->user_ns) copy_flags |= CL_SHARED_TO_SLAVE | CL_UNPRIVILEGED; new = copy_tree(old, old->mnt.mnt_root, copy_flags); @@ -2424,6 +2469,10 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns, } p = next_mnt(p, old); q = next_mnt(q, new); + if (!q) + break; + while (p->mnt.mnt_root != q->mnt.mnt_root) + p = next_mnt(p, old); } namespace_unlock(); @@ -2630,6 +2679,8 @@ SYSCALL_DEFINE2(pivot_root, const char __user *, new_root, goto out4; if (!check_mnt(root_mnt) || !check_mnt(new_mnt)) goto out4; + if (new_mnt->mnt.mnt_flags & MNT_LOCKED) + goto out4; error = -ENOENT; if (d_unlinked(new.dentry)) goto out4; @@ -2653,6 +2704,10 @@ SYSCALL_DEFINE2(pivot_root, const char __user *, new_root, br_write_lock(&vfsmount_lock); detach_mnt(new_mnt, &parent_path); detach_mnt(root_mnt, &root_parent); + if (root_mnt->mnt.mnt_flags & MNT_LOCKED) { + new_mnt->mnt.mnt_flags |= MNT_LOCKED; + root_mnt->mnt.mnt_flags &= ~MNT_LOCKED; + } /* mount old root on put_old */ attach_mnt(root_mnt, old_mnt, old_mp); /* mount new_root on / */ @@ -2811,25 +2866,38 @@ bool current_chrooted(void) return chrooted; } -void update_mnt_policy(struct user_namespace *userns) +bool fs_fully_visible(struct file_system_type *type) { struct mnt_namespace *ns = current->nsproxy->mnt_ns; struct mount *mnt; + bool visible = false; - down_read(&namespace_sem); + if (unlikely(!ns)) + return false; + + namespace_lock(); list_for_each_entry(mnt, &ns->list, mnt_list) { - switch (mnt->mnt.mnt_sb->s_magic) { - case SYSFS_MAGIC: - userns->may_mount_sysfs = true; - break; - case PROC_SUPER_MAGIC: - userns->may_mount_proc = true; - break; + struct mount *child; + if (mnt->mnt.mnt_sb->s_type != type) + continue; + + /* This mount is not fully visible if there are any child mounts + * that cover anything except for empty directories. + */ + list_for_each_entry(child, &mnt->mnt_mounts, mnt_child) { + struct inode *inode = child->mnt_mountpoint->d_inode; + if (!S_ISDIR(inode->i_mode)) + goto next; + if (inode->i_nlink != 2) + goto next; } - if (userns->may_mount_sysfs && userns->may_mount_proc) - break; + visible = true; + goto found; + next: ; } - up_read(&namespace_sem); +found: + namespace_unlock(); + return visible; } static void *mntns_get(struct task_struct *task) @@ -2860,8 +2928,8 @@ static int mntns_install(struct nsproxy *nsproxy, void *ns) struct path root; if (!ns_capable(mnt_ns->user_ns, CAP_SYS_ADMIN) || - !nsown_capable(CAP_SYS_CHROOT) || - !nsown_capable(CAP_SYS_ADMIN)) + !ns_capable(current_user_ns(), CAP_SYS_CHROOT) || + !ns_capable(current_user_ns(), CAP_SYS_ADMIN)) return -EPERM; if (fs->users != 1) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index e474ca2b2bfe..7468735d299e 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1135,14 +1135,13 @@ out_zap_parent: if (inode && S_ISDIR(inode->i_mode)) { /* Purge readdir caches. */ nfs_zap_caches(inode); - /* If we have submounts, don't unhash ! */ - if (have_submounts(dentry)) - goto out_valid; if (dentry->d_flags & DCACHE_DISCONNECTED) goto out_valid; - shrink_dcache_parent(dentry); } - d_drop(dentry); + /* If we have submounts, don't unhash ! */ + if (check_submounts_and_drop(dentry) != 0) + goto out_valid; + dput(parent); dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is invalid\n", __func__, dentry->d_parent->d_name.name, diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index c2a4701d7286..d9454fe5653f 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1816,10 +1816,7 @@ static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, static __be32 nfsd4_encode_path(const struct path *root, const struct path *path, __be32 **pp, int *buflen) { - struct path cur = { - .mnt = path->mnt, - .dentry = path->dentry, - }; + struct path cur = *path; __be32 *p = *pp; struct dentry **components = NULL; unsigned int ncomponents = 0; @@ -1859,14 +1856,19 @@ static __be32 nfsd4_encode_path(const struct path *root, while (ncomponents) { struct dentry *dentry = components[ncomponents - 1]; - unsigned int len = dentry->d_name.len; + unsigned int len; + spin_lock(&dentry->d_lock); + len = dentry->d_name.len; *buflen -= 4 + (XDR_QUADLEN(len) << 2); - if (*buflen < 0) + if (*buflen < 0) { + spin_unlock(&dentry->d_lock); goto out_free; + } WRITE32(len); WRITEMEM(dentry->d_name.name, len); dprintk("/%s", dentry->d_name.name); + spin_unlock(&dentry->d_lock); dput(dentry); ncomponents--; } diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c index dc9a913784ab..2d8be51f90dc 100644 --- a/fs/nilfs2/segbuf.c +++ b/fs/nilfs2/segbuf.c @@ -345,8 +345,7 @@ static void nilfs_end_bio_write(struct bio *bio, int err) if (err == -EOPNOTSUPP) { set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); - bio_put(bio); - /* to be detected by submit_seg_bio() */ + /* to be detected by nilfs_segbuf_submit_bio() */ } if (!uptodate) @@ -377,12 +376,12 @@ static int nilfs_segbuf_submit_bio(struct nilfs_segment_buffer *segbuf, bio->bi_private = segbuf; bio_get(bio); submit_bio(mode, bio); + segbuf->sb_nbio++; if (bio_flagged(bio, BIO_EOPNOTSUPP)) { bio_put(bio); err = -EOPNOTSUPP; goto failed; } - segbuf->sb_nbio++; bio_put(bio); wi->bio = NULL; diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index af3ba0478cdf..7ac2a122ca1d 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -994,23 +994,16 @@ static int nilfs_attach_snapshot(struct super_block *s, __u64 cno, return ret; } -static int nilfs_tree_was_touched(struct dentry *root_dentry) -{ - return d_count(root_dentry) > 1; -} - /** - * nilfs_try_to_shrink_tree() - try to shrink dentries of a checkpoint + * nilfs_tree_is_busy() - try to shrink dentries of a checkpoint * @root_dentry: root dentry of the tree to be shrunk * * This function returns true if the tree was in-use. */ -static int nilfs_try_to_shrink_tree(struct dentry *root_dentry) +static bool nilfs_tree_is_busy(struct dentry *root_dentry) { - if (have_submounts(root_dentry)) - return true; shrink_dcache_parent(root_dentry); - return nilfs_tree_was_touched(root_dentry); + return d_count(root_dentry) > 1; } int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno) @@ -1034,8 +1027,7 @@ int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno) if (inode) { dentry = d_find_alias(inode); if (dentry) { - if (nilfs_tree_was_touched(dentry)) - ret = nilfs_try_to_shrink_tree(dentry); + ret = nilfs_tree_is_busy(dentry); dput(dentry); } iput(inode); @@ -1331,11 +1323,8 @@ nilfs_mount(struct file_system_type *fs_type, int flags, s->s_flags |= MS_ACTIVE; } else if (!sd.cno) { - int busy = false; - - if (nilfs_tree_was_touched(s->s_root)) { - busy = nilfs_try_to_shrink_tree(s->s_root); - if (busy && (flags ^ s->s_flags) & MS_RDONLY) { + if (nilfs_tree_is_busy(s->s_root)) { + if ((flags ^ s->s_flags) & MS_RDONLY) { printk(KERN_ERR "NILFS: the device already " "has a %s mount.\n", (s->s_flags & MS_RDONLY) ? @@ -1343,8 +1332,7 @@ nilfs_mount(struct file_system_type *fs_type, int flags, err = -EBUSY; goto failed_super; } - } - if (!busy) { + } else { /* * Try remount to setup mount states if the current * tree is not mounted and only snapshots use this sb. diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 2abf97b2a592..94417a85ce6e 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -565,9 +565,7 @@ bail: static void ocfs2_dio_end_io(struct kiocb *iocb, loff_t offset, ssize_t bytes, - void *private, - int ret, - bool is_async) + void *private) { struct inode *inode = file_inode(iocb->ki_filp); int level; @@ -592,10 +590,6 @@ static void ocfs2_dio_end_io(struct kiocb *iocb, level = ocfs2_iocb_rw_locked_level(iocb); ocfs2_rw_unlock(inode, level); - - inode_dio_done(inode); - if (is_async) - aio_complete(iocb, ret, 0); } /* diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 854d80955bf8..121da2dc3be8 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -1022,7 +1022,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) struct inode *inode = NULL; struct ocfs2_super *osb = NULL; struct buffer_head *bh = NULL; - char nodestr[8]; + char nodestr[12]; struct ocfs2_blockcheck_stats stats; trace_ocfs2_fill_super(sb, data, silent); diff --git a/fs/ocfs2/xattr.h b/fs/ocfs2/xattr.h index e5c7f15465b4..19f134e896a9 100644 --- a/fs/ocfs2/xattr.h +++ b/fs/ocfs2/xattr.h @@ -32,7 +32,7 @@ enum ocfs2_xattr_type { struct ocfs2_security_xattr_info { int enable; - char *name; + const char *name; void *value; size_t value_len; }; diff --git a/fs/open.c b/fs/open.c index 7931f76acc2b..2a731b0d08bc 100644 --- a/fs/open.c +++ b/fs/open.c @@ -443,7 +443,7 @@ retry: goto dput_and_out; error = -EPERM; - if (!nsown_capable(CAP_SYS_CHROOT)) + if (!ns_capable(current_user_ns(), CAP_SYS_CHROOT)) goto dput_and_out; error = security_path_chroot(&path); if (error) @@ -485,14 +485,13 @@ out_unlock: SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode) { - struct file * file; + struct fd f = fdget(fd); int err = -EBADF; - file = fget(fd); - if (file) { - audit_inode(NULL, file->f_path.dentry, 0); - err = chmod_common(&file->f_path, mode); - fput(file); + if (f.file) { + audit_inode(NULL, f.file->f_path.dentry, 0); + err = chmod_common(&f.file->f_path, mode); + fdput(f); } return err; } diff --git a/fs/pnode.h b/fs/pnode.h index b091445c1c4a..59e7eda1851e 100644 --- a/fs/pnode.h +++ b/fs/pnode.h @@ -19,11 +19,14 @@ #define CL_EXPIRE 0x01 #define CL_SLAVE 0x02 -#define CL_COPY_ALL 0x04 +#define CL_COPY_UNBINDABLE 0x04 #define CL_MAKE_SHARED 0x08 #define CL_PRIVATE 0x10 #define CL_SHARED_TO_SLAVE 0x20 #define CL_UNPRIVILEGED 0x40 +#define CL_COPY_MNT_NS_FILE 0x80 + +#define CL_COPY_ALL (CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE) static inline void set_mnt_shared(struct mount *mnt) { diff --git a/fs/proc/fd.c b/fs/proc/fd.c index 75f2890abbd8..0ff80f9b930f 100644 --- a/fs/proc/fd.c +++ b/fs/proc/fd.c @@ -230,8 +230,6 @@ static int proc_readfd_common(struct file *file, struct dir_context *ctx, if (!dir_emit_dots(file, ctx)) goto out; - if (!dir_emit_dots(file, ctx)) - goto out; files = get_files_struct(p); if (!files) goto out; diff --git a/fs/proc/generic.c b/fs/proc/generic.c index 94441a407337..737e15615b04 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -271,7 +271,7 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *file, de = next; } while (de); spin_unlock(&proc_subdir_lock); - return 0; + return 1; } int proc_readdir(struct file *file, struct dir_context *ctx) diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 073aea60cf8f..9f8ef9b7674d 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -285,6 +285,20 @@ static int proc_reg_mmap(struct file *file, struct vm_area_struct *vma) return rv; } +static unsigned long proc_reg_get_unmapped_area(struct file *file, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) +{ + struct proc_dir_entry *pde = PDE(file_inode(file)); + int rv = -EIO; + unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long); + if (use_pde(pde)) { + get_unmapped_area = pde->proc_fops->get_unmapped_area; + if (get_unmapped_area) + rv = get_unmapped_area(file, orig_addr, len, pgoff, flags); + unuse_pde(pde); + } + return rv; +} + static int proc_reg_open(struct inode *inode, struct file *file) { struct proc_dir_entry *pde = PDE(inode); @@ -356,6 +370,7 @@ static const struct file_operations proc_reg_file_ops = { .compat_ioctl = proc_reg_compat_ioctl, #endif .mmap = proc_reg_mmap, + .get_unmapped_area = proc_reg_get_unmapped_area, .open = proc_reg_open, .release = proc_reg_release, }; @@ -368,6 +383,7 @@ static const struct file_operations proc_reg_file_ops_no_compat = { .poll = proc_reg_poll, .unlocked_ioctl = proc_reg_unlocked_ioctl, .mmap = proc_reg_mmap, + .get_unmapped_area = proc_reg_get_unmapped_area, .open = proc_reg_open, .release = proc_reg_release, }; diff --git a/fs/proc/root.c b/fs/proc/root.c index 229e366598da..87dbcbef7fe4 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -110,7 +110,11 @@ static struct dentry *proc_mount(struct file_system_type *fs_type, ns = task_active_pid_ns(current); options = data; - if (!current_user_ns()->may_mount_proc) + if (!capable(CAP_SYS_ADMIN) && !fs_fully_visible(fs_type)) + return ERR_PTR(-EPERM); + + /* Does the mounter have privilege over the pid namespace? */ + if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN)) return ERR_PTR(-EPERM); } @@ -205,7 +209,9 @@ static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentr static int proc_root_readdir(struct file *file, struct dir_context *ctx) { if (ctx->pos < FIRST_PROCESS_ENTRY) { - proc_readdir(file, ctx); + int error = proc_readdir(file, ctx); + if (unlikely(error <= 0)) + return error; ctx->pos = FIRST_PROCESS_ENTRY; } diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig index ca71db69da07..983d9510becc 100644 --- a/fs/pstore/Kconfig +++ b/fs/pstore/Kconfig @@ -1,6 +1,8 @@ config PSTORE bool "Persistent store support" default n + select ZLIB_DEFLATE + select ZLIB_INFLATE help This option enables generic access to platform level persistent storage via "pstore" filesystem that can diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index 71bf5f4ae84c..12823845d324 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -275,8 +275,8 @@ int pstore_is_mounted(void) * Set the mtime & ctime to the date that this record was originally stored. */ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count, - char *data, size_t size, struct timespec time, - struct pstore_info *psi) + char *data, bool compressed, size_t size, + struct timespec time, struct pstore_info *psi) { struct dentry *root = pstore_sb->s_root; struct dentry *dentry; @@ -315,7 +315,8 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count, switch (type) { case PSTORE_TYPE_DMESG: - sprintf(name, "dmesg-%s-%lld", psname, id); + sprintf(name, "dmesg-%s-%lld%s", psname, id, + compressed ? ".enc.z" : ""); break; case PSTORE_TYPE_CONSOLE: sprintf(name, "console-%s", psname); @@ -345,9 +346,8 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count, mutex_lock(&root->d_inode->i_mutex); - rc = -ENOSPC; dentry = d_alloc_name(root, name); - if (IS_ERR(dentry)) + if (!dentry) goto fail_lockedalloc; memcpy(private->data, data, size); diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h index 937d820f273c..3b3d305277c4 100644 --- a/fs/pstore/internal.h +++ b/fs/pstore/internal.h @@ -50,8 +50,9 @@ extern struct pstore_info *psinfo; extern void pstore_set_kmsg_bytes(int); extern void pstore_get_records(int); extern int pstore_mkfile(enum pstore_type_id, char *psname, u64 id, - int count, char *data, size_t size, - struct timespec time, struct pstore_info *psi); + int count, char *data, bool compressed, + size_t size, struct timespec time, + struct pstore_info *psi); extern int pstore_is_mounted(void); #endif diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 422962ae9fc2..4ffb7ab5e397 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -26,6 +26,7 @@ #include <linux/console.h> #include <linux/module.h> #include <linux/pstore.h> +#include <linux/zlib.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/slab.h> @@ -65,6 +66,15 @@ struct pstore_info *psinfo; static char *backend; +/* Compression parameters */ +#define COMPR_LEVEL 6 +#define WINDOW_BITS 12 +#define MEM_LEVEL 4 +static struct z_stream_s stream; + +static char *big_oops_buf; +static size_t big_oops_buf_sz; + /* How much of the console log to snapshot */ static unsigned long kmsg_bytes = 10240; @@ -117,6 +127,121 @@ bool pstore_cannot_block_path(enum kmsg_dump_reason reason) } EXPORT_SYMBOL_GPL(pstore_cannot_block_path); +/* Derived from logfs_compress() */ +static int pstore_compress(const void *in, void *out, size_t inlen, + size_t outlen) +{ + int err, ret; + + ret = -EIO; + err = zlib_deflateInit2(&stream, COMPR_LEVEL, Z_DEFLATED, WINDOW_BITS, + MEM_LEVEL, Z_DEFAULT_STRATEGY); + if (err != Z_OK) + goto error; + + stream.next_in = in; + stream.avail_in = inlen; + stream.total_in = 0; + stream.next_out = out; + stream.avail_out = outlen; + stream.total_out = 0; + + err = zlib_deflate(&stream, Z_FINISH); + if (err != Z_STREAM_END) + goto error; + + err = zlib_deflateEnd(&stream); + if (err != Z_OK) + goto error; + + if (stream.total_out >= stream.total_in) + goto error; + + ret = stream.total_out; +error: + return ret; +} + +/* Derived from logfs_uncompress */ +static int pstore_decompress(void *in, void *out, size_t inlen, size_t outlen) +{ + int err, ret; + + ret = -EIO; + err = zlib_inflateInit(&stream); + if (err != Z_OK) + goto error; + + stream.next_in = in; + stream.avail_in = inlen; + stream.total_in = 0; + stream.next_out = out; + stream.avail_out = outlen; + stream.total_out = 0; + + err = zlib_inflate(&stream, Z_FINISH); + if (err != Z_STREAM_END) + goto error; + + err = zlib_inflateEnd(&stream); + if (err != Z_OK) + goto error; + + ret = stream.total_out; +error: + return ret; +} + +static void allocate_buf_for_compression(void) +{ + size_t size; + + big_oops_buf_sz = (psinfo->bufsize * 100) / 45; + big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL); + if (big_oops_buf) { + size = max(zlib_deflate_workspacesize(WINDOW_BITS, MEM_LEVEL), + zlib_inflate_workspacesize()); + stream.workspace = kmalloc(size, GFP_KERNEL); + if (!stream.workspace) { + pr_err("pstore: No memory for compression workspace; " + "skipping compression\n"); + kfree(big_oops_buf); + big_oops_buf = NULL; + } + } else { + pr_err("No memory for uncompressed data; " + "skipping compression\n"); + stream.workspace = NULL; + } + +} + +/* + * Called when compression fails, since the printk buffer + * would be fetched for compression calling it again when + * compression fails would have moved the iterator of + * printk buffer which results in fetching old contents. + * Copy the recent messages from big_oops_buf to psinfo->buf + */ +static size_t copy_kmsg_to_buffer(int hsize, size_t len) +{ + size_t total_len; + size_t diff; + + total_len = hsize + len; + + if (total_len > psinfo->bufsize) { + diff = total_len - psinfo->bufsize + hsize; + memcpy(psinfo->buf, big_oops_buf, hsize); + memcpy(psinfo->buf + hsize, big_oops_buf + diff, + psinfo->bufsize - hsize); + total_len = psinfo->bufsize; + } else + memcpy(psinfo->buf, big_oops_buf, total_len); + + return total_len; +} + /* * callback from kmsg_dump. (s2,l2) has the most recently * written bytes, older bytes are in (s1,l1). Save as much @@ -148,22 +273,56 @@ static void pstore_dump(struct kmsg_dumper *dumper, char *dst; unsigned long size; int hsize; + int zipped_len = -1; size_t len; + bool compressed; + size_t total_len; - dst = psinfo->buf; - hsize = sprintf(dst, "%s#%d Part%d\n", why, oopscount, part); - size = psinfo->bufsize - hsize; - dst += hsize; + if (big_oops_buf) { + dst = big_oops_buf; + hsize = sprintf(dst, "%s#%d Part%d\n", why, + oopscount, part); + size = big_oops_buf_sz - hsize; - if (!kmsg_dump_get_buffer(dumper, true, dst, size, &len)) - break; + if (!kmsg_dump_get_buffer(dumper, true, dst + hsize, + size, &len)) + break; + + zipped_len = pstore_compress(dst, psinfo->buf, + hsize + len, psinfo->bufsize); + + if (zipped_len > 0) { + compressed = true; + total_len = zipped_len; + } else { + pr_err("pstore: compression failed for Part %d" + " returned %d\n", part, zipped_len); + pr_err("pstore: Capture uncompressed" + " oops/panic report of Part %d\n", part); + compressed = false; + total_len = copy_kmsg_to_buffer(hsize, len); + } + } else { + dst = psinfo->buf; + hsize = sprintf(dst, "%s#%d Part%d\n", why, oopscount, + part); + size = psinfo->bufsize - hsize; + dst += hsize; + + if (!kmsg_dump_get_buffer(dumper, true, dst, + size, &len)) + break; + + compressed = false; + total_len = hsize + len; + } ret = psinfo->write(PSTORE_TYPE_DMESG, reason, &id, part, - oopscount, hsize, hsize + len, psinfo); + oopscount, compressed, total_len, psinfo); if (ret == 0 && reason == KMSG_DUMP_OOPS && pstore_is_mounted()) pstore_new_entry = 1; - total += hsize + len; + total += total_len; part++; } if (pstore_cannot_block_path(reason)) { @@ -221,10 +380,10 @@ static void pstore_register_console(void) {} static int pstore_write_compat(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, unsigned int part, int count, - size_t hsize, size_t size, + bool compressed, size_t size, struct pstore_info *psi) { - return psi->write_buf(type, reason, id, part, psinfo->buf, hsize, + return psi->write_buf(type, reason, id, part, psinfo->buf, compressed, size, psi); } @@ -261,6 +420,8 @@ int pstore_register(struct pstore_info *psi) return -EINVAL; } + allocate_buf_for_compression(); + if (pstore_is_mounted()) pstore_get_records(0); @@ -297,6 +458,8 @@ void pstore_get_records(int quiet) enum pstore_type_id type; struct timespec time; int failed = 0, rc; + bool compressed; + int unzipped_len = -1; if (!psi) return; @@ -305,11 +468,32 @@ void pstore_get_records(int quiet) if (psi->open && psi->open(psi)) goto out; - while ((size = psi->read(&id, &type, &count, &time, &buf, psi)) > 0) { + while ((size = psi->read(&id, &type, &count, &time, &buf, &compressed, + psi)) > 0) { + if (compressed && (type == PSTORE_TYPE_DMESG)) { + if (big_oops_buf) + unzipped_len = pstore_decompress(buf, + big_oops_buf, size, + big_oops_buf_sz); + + if (unzipped_len > 0) { + buf = big_oops_buf; + size = unzipped_len; + compressed = false; + } else { + pr_err("pstore: decompression failed;" + "returned %d\n", unzipped_len); + compressed = true; + } + } rc = pstore_mkfile(type, psi->name, id, count, buf, - (size_t)size, time, psi); - kfree(buf); - buf = NULL; + compressed, (size_t)size, time, psi); + if (unzipped_len < 0) { + /* Free buffer other than big oops */ + kfree(buf); + buf = NULL; + } else + unzipped_len = -1; if (rc && (rc != -EEXIST || !quiet)) failed++; } diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index a6119f9469e2..fa8cef2cca3a 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -131,9 +131,31 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max, return prz; } +static void ramoops_read_kmsg_hdr(char *buffer, struct timespec *time, + bool *compressed) +{ + char data_type; + + if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%lu.%lu-%c\n", + &time->tv_sec, &time->tv_nsec, &data_type) == 3) { + if (data_type == 'C') + *compressed = true; + else + *compressed = false; + } else if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%lu.%lu\n", + &time->tv_sec, &time->tv_nsec) == 2) { + *compressed = false; + } else { + time->tv_sec = 0; + time->tv_nsec = 0; + *compressed = false; + } +} + static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, int *count, struct timespec *time, - char **buf, struct pstore_info *psi) + char **buf, bool *compressed, + struct pstore_info *psi) { ssize_t size; ssize_t ecc_notice_size; @@ -152,10 +174,6 @@ static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, if (!prz) return 0; - /* TODO(kees): Bogus time for the moment. */ - time->tv_sec = 0; - time->tv_nsec = 0; - size = persistent_ram_old_size(prz); /* ECC correction notice */ @@ -166,12 +184,14 @@ static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, return -ENOMEM; memcpy(*buf, persistent_ram_old(prz), size); + ramoops_read_kmsg_hdr(*buf, time, compressed); persistent_ram_ecc_string(prz, *buf + size, ecc_notice_size + 1); return size + ecc_notice_size; } -static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz) +static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz, + bool compressed) { char *hdr; struct timespec timestamp; @@ -182,8 +202,9 @@ static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz) timestamp.tv_sec = 0; timestamp.tv_nsec = 0; } - hdr = kasprintf(GFP_ATOMIC, RAMOOPS_KERNMSG_HDR "%lu.%lu\n", - (long)timestamp.tv_sec, (long)(timestamp.tv_nsec / 1000)); + hdr = kasprintf(GFP_ATOMIC, RAMOOPS_KERNMSG_HDR "%lu.%lu-%c\n", + (long)timestamp.tv_sec, (long)(timestamp.tv_nsec / 1000), + compressed ? 'C' : 'D'); WARN_ON_ONCE(!hdr); len = hdr ? strlen(hdr) : 0; persistent_ram_write(prz, hdr, len); @@ -196,7 +217,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, unsigned int part, const char *buf, - size_t hsize, size_t size, + bool compressed, size_t size, struct pstore_info *psi) { struct ramoops_context *cxt = psi->data; @@ -242,7 +263,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, prz = cxt->przs[cxt->dump_write_cnt]; - hlen = ramoops_write_kmsg_hdr(prz); + hlen = ramoops_write_kmsg_hdr(prz, compressed); if (size + hlen > prz->buffer_size) size = prz->buffer_size - hlen; persistent_ram_write(prz, buf, size); @@ -400,11 +421,11 @@ static int ramoops_probe(struct platform_device *pdev) goto fail_out; } - if (!is_power_of_2(pdata->record_size)) + if (pdata->record_size && !is_power_of_2(pdata->record_size)) pdata->record_size = rounddown_pow_of_two(pdata->record_size); - if (!is_power_of_2(pdata->console_size)) + if (pdata->console_size && !is_power_of_2(pdata->console_size)) pdata->console_size = rounddown_pow_of_two(pdata->console_size); - if (!is_power_of_2(pdata->ftrace_size)) + if (pdata->ftrace_size && !is_power_of_2(pdata->ftrace_size)) pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size); cxt->dump_read_cnt = 0; diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index fbad622841f9..9a702e193538 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -1094,6 +1094,14 @@ static void dquot_claim_reserved_space(struct dquot *dquot, qsize_t number) dquot->dq_dqb.dqb_rsvspace -= number; } +static void dquot_reclaim_reserved_space(struct dquot *dquot, qsize_t number) +{ + if (WARN_ON_ONCE(dquot->dq_dqb.dqb_curspace < number)) + number = dquot->dq_dqb.dqb_curspace; + dquot->dq_dqb.dqb_rsvspace += number; + dquot->dq_dqb.dqb_curspace -= number; +} + static inline void dquot_free_reserved_space(struct dquot *dquot, qsize_t number) { @@ -1528,6 +1536,15 @@ void inode_claim_rsv_space(struct inode *inode, qsize_t number) } EXPORT_SYMBOL(inode_claim_rsv_space); +void inode_reclaim_rsv_space(struct inode *inode, qsize_t number) +{ + spin_lock(&inode->i_lock); + *inode_reserved_space(inode) += number; + __inode_sub_bytes(inode, number); + spin_unlock(&inode->i_lock); +} +EXPORT_SYMBOL(inode_reclaim_rsv_space); + void inode_sub_rsv_space(struct inode *inode, qsize_t number) { spin_lock(&inode->i_lock); @@ -1702,6 +1719,35 @@ int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) EXPORT_SYMBOL(dquot_claim_space_nodirty); /* + * Convert allocated space back to in-memory reserved quotas + */ +void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number) +{ + int cnt; + + if (!dquot_active(inode)) { + inode_reclaim_rsv_space(inode, number); + return; + } + + down_read(&sb_dqopt(inode->i_sb)->dqptr_sem); + spin_lock(&dq_data_lock); + /* Claim reserved quotas to allocated quotas */ + for (cnt = 0; cnt < MAXQUOTAS; cnt++) { + if (inode->i_dquot[cnt]) + dquot_reclaim_reserved_space(inode->i_dquot[cnt], + number); + } + /* Update inode bytes */ + inode_reclaim_rsv_space(inode, number); + spin_unlock(&dq_data_lock); + mark_all_dquot_dirty(inode->i_dquot); + up_read(&sb_dqopt(inode->i_sb)->dqptr_sem); + return; +} +EXPORT_SYMBOL(dquot_reclaim_space_nodirty); + +/* * This operation can block, but only after everything is updated */ void __dquot_free_space(struct inode *inode, qsize_t number, int flags) diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c index a98b7740a0fc..dc9a6829f7c6 100644 --- a/fs/reiserfs/bitmap.c +++ b/fs/reiserfs/bitmap.c @@ -423,8 +423,11 @@ static void _reiserfs_free_block(struct reiserfs_transaction_handle *th, set_sb_free_blocks(rs, sb_free_blocks(rs) + 1); journal_mark_dirty(th, s, sbh); - if (for_unformatted) + if (for_unformatted) { + int depth = reiserfs_write_unlock_nested(s); dquot_free_block_nodirty(inode, 1); + reiserfs_write_lock_nested(s, depth); + } } void reiserfs_free_block(struct reiserfs_transaction_handle *th, @@ -1128,6 +1131,7 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start b_blocknr_t finish = SB_BLOCK_COUNT(s) - 1; int passno = 0; int nr_allocated = 0; + int depth; determine_prealloc_size(hint); if (!hint->formatted_node) { @@ -1137,10 +1141,13 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start "reiserquota: allocating %d blocks id=%u", amount_needed, hint->inode->i_uid); #endif + depth = reiserfs_write_unlock_nested(s); quota_ret = dquot_alloc_block_nodirty(hint->inode, amount_needed); - if (quota_ret) /* Quota exceeded? */ + if (quota_ret) { /* Quota exceeded? */ + reiserfs_write_lock_nested(s, depth); return QUOTA_EXCEEDED; + } if (hint->preallocate && hint->prealloc_size) { #ifdef REISERQUOTA_DEBUG reiserfs_debug(s, REISERFS_DEBUG_CODE, @@ -1153,6 +1160,7 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start hint->preallocate = hint->prealloc_size = 0; } /* for unformatted nodes, force large allocations */ + reiserfs_write_lock_nested(s, depth); } do { @@ -1181,9 +1189,11 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start hint->inode->i_uid); #endif /* Free not allocated blocks */ + depth = reiserfs_write_unlock_nested(s); dquot_free_block_nodirty(hint->inode, amount_needed + hint->prealloc_size - nr_allocated); + reiserfs_write_lock_nested(s, depth); } while (nr_allocated--) reiserfs_free_block(hint->th, hint->inode, @@ -1214,10 +1224,13 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start REISERFS_I(hint->inode)->i_prealloc_count, hint->inode->i_uid); #endif + + depth = reiserfs_write_unlock_nested(s); dquot_free_block_nodirty(hint->inode, amount_needed + hint->prealloc_size - nr_allocated - REISERFS_I(hint->inode)-> i_prealloc_count); + reiserfs_write_lock_nested(s, depth); } return CARRY_ON; @@ -1340,10 +1353,11 @@ struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb, "reading failed", __func__, block); else { if (buffer_locked(bh)) { + int depth; PROC_INFO_INC(sb, scan_bitmap.wait); - reiserfs_write_unlock(sb); + depth = reiserfs_write_unlock_nested(sb); __wait_on_buffer(bh); - reiserfs_write_lock(sb); + reiserfs_write_lock_nested(sb, depth); } BUG_ON(!buffer_uptodate(bh)); BUG_ON(atomic_read(&bh->b_count) == 0); diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c index 03e4ca5624d6..1fd2051109a3 100644 --- a/fs/reiserfs/dir.c +++ b/fs/reiserfs/dir.c @@ -71,6 +71,7 @@ int reiserfs_readdir_inode(struct inode *inode, struct dir_context *ctx) char small_buf[32]; /* avoid kmalloc if we can */ struct reiserfs_dir_entry de; int ret = 0; + int depth; reiserfs_write_lock(inode->i_sb); @@ -181,17 +182,17 @@ int reiserfs_readdir_inode(struct inode *inode, struct dir_context *ctx) * Since filldir might sleep, we can release * the write lock here for other waiters */ - reiserfs_write_unlock(inode->i_sb); + depth = reiserfs_write_unlock_nested(inode->i_sb); if (!dir_emit (ctx, local_buf, d_reclen, d_ino, DT_UNKNOWN)) { - reiserfs_write_lock(inode->i_sb); + reiserfs_write_lock_nested(inode->i_sb, depth); if (local_buf != small_buf) { kfree(local_buf); } goto end; } - reiserfs_write_lock(inode->i_sb); + reiserfs_write_lock_nested(inode->i_sb, depth); if (local_buf != small_buf) { kfree(local_buf); } diff --git a/fs/reiserfs/fix_node.c b/fs/reiserfs/fix_node.c index 430e0658704c..dc4d41530316 100644 --- a/fs/reiserfs/fix_node.c +++ b/fs/reiserfs/fix_node.c @@ -1022,9 +1022,9 @@ static int get_far_parent(struct tree_balance *tb, if (buffer_locked(*pcom_father)) { /* Release the write lock while the buffer is busy */ - reiserfs_write_unlock(tb->tb_sb); + int depth = reiserfs_write_unlock_nested(tb->tb_sb); __wait_on_buffer(*pcom_father); - reiserfs_write_lock(tb->tb_sb); + reiserfs_write_lock_nested(tb->tb_sb, depth); if (FILESYSTEM_CHANGED_TB(tb)) { brelse(*pcom_father); return REPEAT_SEARCH; @@ -1929,9 +1929,9 @@ static int get_direct_parent(struct tree_balance *tb, int h) return REPEAT_SEARCH; if (buffer_locked(bh)) { - reiserfs_write_unlock(tb->tb_sb); + int depth = reiserfs_write_unlock_nested(tb->tb_sb); __wait_on_buffer(bh); - reiserfs_write_lock(tb->tb_sb); + reiserfs_write_lock_nested(tb->tb_sb, depth); if (FILESYSTEM_CHANGED_TB(tb)) return REPEAT_SEARCH; } @@ -1952,6 +1952,7 @@ static int get_neighbors(struct tree_balance *tb, int h) unsigned long son_number; struct super_block *sb = tb->tb_sb; struct buffer_head *bh; + int depth; PROC_INFO_INC(sb, get_neighbors[h]); @@ -1969,9 +1970,9 @@ static int get_neighbors(struct tree_balance *tb, int h) tb->FL[h]) ? tb->lkey[h] : B_NR_ITEMS(tb-> FL[h]); son_number = B_N_CHILD_NUM(tb->FL[h], child_position); - reiserfs_write_unlock(sb); + depth = reiserfs_write_unlock_nested(tb->tb_sb); bh = sb_bread(sb, son_number); - reiserfs_write_lock(sb); + reiserfs_write_lock_nested(tb->tb_sb, depth); if (!bh) return IO_ERROR; if (FILESYSTEM_CHANGED_TB(tb)) { @@ -2009,9 +2010,9 @@ static int get_neighbors(struct tree_balance *tb, int h) child_position = (bh == tb->FR[h]) ? tb->rkey[h] + 1 : 0; son_number = B_N_CHILD_NUM(tb->FR[h], child_position); - reiserfs_write_unlock(sb); + depth = reiserfs_write_unlock_nested(tb->tb_sb); bh = sb_bread(sb, son_number); - reiserfs_write_lock(sb); + reiserfs_write_lock_nested(tb->tb_sb, depth); if (!bh) return IO_ERROR; if (FILESYSTEM_CHANGED_TB(tb)) { @@ -2272,6 +2273,7 @@ static int wait_tb_buffers_until_unlocked(struct tree_balance *tb) } if (locked) { + int depth; #ifdef CONFIG_REISERFS_CHECK repeat_counter++; if ((repeat_counter % 10000) == 0) { @@ -2286,9 +2288,9 @@ static int wait_tb_buffers_until_unlocked(struct tree_balance *tb) REPEAT_SEARCH : CARRY_ON; } #endif - reiserfs_write_unlock(tb->tb_sb); + depth = reiserfs_write_unlock_nested(tb->tb_sb); __wait_on_buffer(locked); - reiserfs_write_lock(tb->tb_sb); + reiserfs_write_lock_nested(tb->tb_sb, depth); if (FILESYSTEM_CHANGED_TB(tb)) return REPEAT_SEARCH; } @@ -2359,9 +2361,9 @@ int fix_nodes(int op_mode, struct tree_balance *tb, /* if it possible in indirect_to_direct conversion */ if (buffer_locked(tbS0)) { - reiserfs_write_unlock(tb->tb_sb); + int depth = reiserfs_write_unlock_nested(tb->tb_sb); __wait_on_buffer(tbS0); - reiserfs_write_lock(tb->tb_sb); + reiserfs_write_lock_nested(tb->tb_sb, depth); if (FILESYSTEM_CHANGED_TB(tb)) return REPEAT_SEARCH; } diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index 0048cc16a6a8..ad62bdbb451e 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -30,7 +30,6 @@ void reiserfs_evict_inode(struct inode *inode) JOURNAL_PER_BALANCE_CNT * 2 + 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb); struct reiserfs_transaction_handle th; - int depth; int err; if (!inode->i_nlink && !is_bad_inode(inode)) @@ -40,12 +39,13 @@ void reiserfs_evict_inode(struct inode *inode) if (inode->i_nlink) goto no_delete; - depth = reiserfs_write_lock_once(inode->i_sb); - /* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */ if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) { /* also handles bad_inode case */ + reiserfs_delete_xattrs(inode); + reiserfs_write_lock(inode->i_sb); + if (journal_begin(&th, inode->i_sb, jbegin_count)) goto out; reiserfs_update_inode_transaction(inode); @@ -57,8 +57,11 @@ void reiserfs_evict_inode(struct inode *inode) /* Do quota update inside a transaction for journaled quotas. We must do that * after delete_object so that quota updates go into the same transaction as * stat data deletion */ - if (!err) + if (!err) { + int depth = reiserfs_write_unlock_nested(inode->i_sb); dquot_free_inode(inode); + reiserfs_write_lock_nested(inode->i_sb, depth); + } if (journal_end(&th, inode->i_sb, jbegin_count)) goto out; @@ -72,12 +75,12 @@ void reiserfs_evict_inode(struct inode *inode) /* all items of file are deleted, so we can remove "save" link */ remove_save_link(inode, 0 /* not truncate */ ); /* we can't do anything * about an error here */ +out: + reiserfs_write_unlock(inode->i_sb); } else { /* no object items are in the tree */ ; } - out: - reiserfs_write_unlock_once(inode->i_sb, depth); clear_inode(inode); /* note this must go after the journal_end to prevent deadlock */ dquot_drop(inode); inode->i_blocks = 0; @@ -610,7 +613,6 @@ int reiserfs_get_block(struct inode *inode, sector_t block, __le32 *item; int done; int fs_gen; - int lock_depth; struct reiserfs_transaction_handle *th = NULL; /* space reserved in transaction batch: . 3 balancings in direct->indirect conversion @@ -626,11 +628,11 @@ int reiserfs_get_block(struct inode *inode, sector_t block, loff_t new_offset = (((loff_t) block) << inode->i_sb->s_blocksize_bits) + 1; - lock_depth = reiserfs_write_lock_once(inode->i_sb); + reiserfs_write_lock(inode->i_sb); version = get_inode_item_key_version(inode); if (!file_capable(inode, block)) { - reiserfs_write_unlock_once(inode->i_sb, lock_depth); + reiserfs_write_unlock(inode->i_sb); return -EFBIG; } @@ -642,7 +644,7 @@ int reiserfs_get_block(struct inode *inode, sector_t block, /* find number of block-th logical block of the file */ ret = _get_block_create_0(inode, block, bh_result, create | GET_BLOCK_READ_DIRECT); - reiserfs_write_unlock_once(inode->i_sb, lock_depth); + reiserfs_write_unlock(inode->i_sb); return ret; } /* @@ -760,7 +762,7 @@ int reiserfs_get_block(struct inode *inode, sector_t block, if (!dangle && th) retval = reiserfs_end_persistent_transaction(th); - reiserfs_write_unlock_once(inode->i_sb, lock_depth); + reiserfs_write_unlock(inode->i_sb); /* the item was found, so new blocks were not added to the file ** there is no need to make sure the inode is updated with this @@ -1011,11 +1013,7 @@ int reiserfs_get_block(struct inode *inode, sector_t block, * long time. reschedule if needed and also release the write * lock for others. */ - if (need_resched()) { - reiserfs_write_unlock_once(inode->i_sb, lock_depth); - schedule(); - lock_depth = reiserfs_write_lock_once(inode->i_sb); - } + reiserfs_cond_resched(inode->i_sb); retval = search_for_position_by_key(inode->i_sb, &key, &path); if (retval == IO_ERROR) { @@ -1050,7 +1048,7 @@ int reiserfs_get_block(struct inode *inode, sector_t block, retval = err; } - reiserfs_write_unlock_once(inode->i_sb, lock_depth); + reiserfs_write_unlock(inode->i_sb); reiserfs_check_path(&path); return retval; } @@ -1509,14 +1507,15 @@ struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key) { struct inode *inode; struct reiserfs_iget_args args; + int depth; args.objectid = key->on_disk_key.k_objectid; args.dirid = key->on_disk_key.k_dir_id; - reiserfs_write_unlock(s); + depth = reiserfs_write_unlock_nested(s); inode = iget5_locked(s, key->on_disk_key.k_objectid, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args)); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); if (!inode) return ERR_PTR(-ENOMEM); @@ -1772,7 +1771,7 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, struct inode *inode, struct reiserfs_security_handle *security) { - struct super_block *sb; + struct super_block *sb = dir->i_sb; struct reiserfs_iget_args args; INITIALIZE_PATH(path_to_key); struct cpu_key key; @@ -1780,12 +1779,13 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, struct stat_data sd; int retval; int err; + int depth; BUG_ON(!th->t_trans_id); - reiserfs_write_unlock(inode->i_sb); + depth = reiserfs_write_unlock_nested(sb); err = dquot_alloc_inode(inode); - reiserfs_write_lock(inode->i_sb); + reiserfs_write_lock_nested(sb, depth); if (err) goto out_end_trans; if (!dir->i_nlink) { @@ -1793,8 +1793,6 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, goto out_bad_inode; } - sb = dir->i_sb; - /* item head of new item */ ih.ih_key.k_dir_id = reiserfs_choose_packing(dir); ih.ih_key.k_objectid = cpu_to_le32(reiserfs_get_unused_objectid(th)); @@ -1812,10 +1810,10 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, memcpy(INODE_PKEY(inode), &(ih.ih_key), KEY_SIZE); args.dirid = le32_to_cpu(ih.ih_key.k_dir_id); - reiserfs_write_unlock(inode->i_sb); + depth = reiserfs_write_unlock_nested(inode->i_sb); err = insert_inode_locked4(inode, args.objectid, reiserfs_find_actor, &args); - reiserfs_write_lock(inode->i_sb); + reiserfs_write_lock_nested(inode->i_sb, depth); if (err) { err = -EINVAL; goto out_bad_inode; @@ -1941,7 +1939,9 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, } if (reiserfs_posixacl(inode->i_sb)) { + reiserfs_write_unlock(inode->i_sb); retval = reiserfs_inherit_default_acl(th, dir, dentry, inode); + reiserfs_write_lock(inode->i_sb); if (retval) { err = retval; reiserfs_check_path(&path_to_key); @@ -1956,7 +1956,9 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, inode->i_flags |= S_PRIVATE; if (security->name) { + reiserfs_write_unlock(inode->i_sb); retval = reiserfs_security_write(th, inode, security); + reiserfs_write_lock(inode->i_sb); if (retval) { err = retval; reiserfs_check_path(&path_to_key); @@ -1982,14 +1984,16 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, INODE_PKEY(inode)->k_objectid = 0; /* Quota change must be inside a transaction for journaling */ + depth = reiserfs_write_unlock_nested(inode->i_sb); dquot_free_inode(inode); + reiserfs_write_lock_nested(inode->i_sb, depth); out_end_trans: journal_end(th, th->t_super, th->t_blocks_allocated); - reiserfs_write_unlock(inode->i_sb); /* Drop can be outside and it needs more credits so it's better to have it outside */ + depth = reiserfs_write_unlock_nested(inode->i_sb); dquot_drop(inode); - reiserfs_write_lock(inode->i_sb); + reiserfs_write_lock_nested(inode->i_sb, depth); inode->i_flags |= S_NOQUOTA; make_bad_inode(inode); @@ -2103,9 +2107,8 @@ int reiserfs_truncate_file(struct inode *inode, int update_timestamps) int error; struct buffer_head *bh = NULL; int err2; - int lock_depth; - lock_depth = reiserfs_write_lock_once(inode->i_sb); + reiserfs_write_lock(inode->i_sb); if (inode->i_size > 0) { error = grab_tail_page(inode, &page, &bh); @@ -2174,7 +2177,7 @@ int reiserfs_truncate_file(struct inode *inode, int update_timestamps) page_cache_release(page); } - reiserfs_write_unlock_once(inode->i_sb, lock_depth); + reiserfs_write_unlock(inode->i_sb); return 0; out: @@ -2183,7 +2186,7 @@ int reiserfs_truncate_file(struct inode *inode, int update_timestamps) page_cache_release(page); } - reiserfs_write_unlock_once(inode->i_sb, lock_depth); + reiserfs_write_unlock(inode->i_sb); return error; } @@ -2648,10 +2651,11 @@ int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len) struct inode *inode = page->mapping->host; int ret; int old_ref = 0; + int depth; - reiserfs_write_unlock(inode->i_sb); + depth = reiserfs_write_unlock_nested(inode->i_sb); reiserfs_wait_on_write_block(inode->i_sb); - reiserfs_write_lock(inode->i_sb); + reiserfs_write_lock_nested(inode->i_sb, depth); fix_tail_page_for_writing(page); if (reiserfs_transaction_running(inode->i_sb)) { @@ -2708,7 +2712,6 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping, int update_sd = 0; struct reiserfs_transaction_handle *th; unsigned start; - int lock_depth = 0; bool locked = false; if ((unsigned long)fsdata & AOP_FLAG_CONT_EXPAND) @@ -2737,7 +2740,7 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping, */ if (pos + copied > inode->i_size) { struct reiserfs_transaction_handle myth; - lock_depth = reiserfs_write_lock_once(inode->i_sb); + reiserfs_write_lock(inode->i_sb); locked = true; /* If the file have grown beyond the border where it can have a tail, unmark it as needing a tail @@ -2768,7 +2771,7 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping, } if (th) { if (!locked) { - lock_depth = reiserfs_write_lock_once(inode->i_sb); + reiserfs_write_lock(inode->i_sb); locked = true; } if (!update_sd) @@ -2780,7 +2783,7 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping, out: if (locked) - reiserfs_write_unlock_once(inode->i_sb, lock_depth); + reiserfs_write_unlock(inode->i_sb); unlock_page(page); page_cache_release(page); @@ -2790,7 +2793,7 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping, return ret == 0 ? copied : ret; journal_error: - reiserfs_write_unlock_once(inode->i_sb, lock_depth); + reiserfs_write_unlock(inode->i_sb); locked = false; if (th) { if (!update_sd) @@ -2808,10 +2811,11 @@ int reiserfs_commit_write(struct file *f, struct page *page, int ret = 0; int update_sd = 0; struct reiserfs_transaction_handle *th = NULL; + int depth; - reiserfs_write_unlock(inode->i_sb); + depth = reiserfs_write_unlock_nested(inode->i_sb); reiserfs_wait_on_write_block(inode->i_sb); - reiserfs_write_lock(inode->i_sb); + reiserfs_write_lock_nested(inode->i_sb, depth); if (reiserfs_transaction_running(inode->i_sb)) { th = current->journal_info; @@ -3110,7 +3114,6 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) { struct inode *inode = dentry->d_inode; unsigned int ia_valid; - int depth; int error; error = inode_change_ok(inode, attr); @@ -3122,13 +3125,14 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) if (is_quota_modification(inode, attr)) dquot_initialize(inode); - depth = reiserfs_write_lock_once(inode->i_sb); + reiserfs_write_lock(inode->i_sb); if (attr->ia_valid & ATTR_SIZE) { /* version 2 items will be caught by the s_maxbytes check ** done for us in vmtruncate */ if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 && attr->ia_size > MAX_NON_LFS) { + reiserfs_write_unlock(inode->i_sb); error = -EFBIG; goto out; } @@ -3150,8 +3154,10 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) if (err) error = err; } - if (error) + if (error) { + reiserfs_write_unlock(inode->i_sb); goto out; + } /* * file size is changed, ctime and mtime are * to be updated @@ -3159,6 +3165,7 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) attr->ia_valid |= (ATTR_MTIME | ATTR_CTIME); } } + reiserfs_write_unlock(inode->i_sb); if ((((attr->ia_valid & ATTR_UID) && (from_kuid(&init_user_ns, attr->ia_uid) & ~0xffff)) || ((attr->ia_valid & ATTR_GID) && (from_kgid(&init_user_ns, attr->ia_gid) & ~0xffff))) && @@ -3183,14 +3190,16 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) return error; /* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */ + reiserfs_write_lock(inode->i_sb); error = journal_begin(&th, inode->i_sb, jbegin_count); + reiserfs_write_unlock(inode->i_sb); if (error) goto out; - reiserfs_write_unlock_once(inode->i_sb, depth); error = dquot_transfer(inode, attr); - depth = reiserfs_write_lock_once(inode->i_sb); + reiserfs_write_lock(inode->i_sb); if (error) { journal_end(&th, inode->i_sb, jbegin_count); + reiserfs_write_unlock(inode->i_sb); goto out; } @@ -3202,17 +3211,11 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) inode->i_gid = attr->ia_gid; mark_inode_dirty(inode); error = journal_end(&th, inode->i_sb, jbegin_count); + reiserfs_write_unlock(inode->i_sb); if (error) goto out; } - /* - * Relax the lock here, as it might truncate the - * inode pages and wait for inode pages locks. - * To release such page lock, the owner needs the - * reiserfs lock - */ - reiserfs_write_unlock_once(inode->i_sb, depth); if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size != i_size_read(inode)) { error = inode_newsize_ok(inode, attr->ia_size); @@ -3226,16 +3229,13 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) setattr_copy(inode, attr); mark_inode_dirty(inode); } - depth = reiserfs_write_lock_once(inode->i_sb); if (!error && reiserfs_posixacl(inode->i_sb)) { if (attr->ia_valid & ATTR_MODE) error = reiserfs_acl_chmod(inode); } - out: - reiserfs_write_unlock_once(inode->i_sb, depth); - +out: return error; } diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c index 15cb5fe6b425..946ccbf5b5a1 100644 --- a/fs/reiserfs/ioctl.c +++ b/fs/reiserfs/ioctl.c @@ -167,7 +167,6 @@ int reiserfs_commit_write(struct file *f, struct page *page, int reiserfs_unpack(struct inode *inode, struct file *filp) { int retval = 0; - int depth; int index; struct page *page; struct address_space *mapping; @@ -183,11 +182,11 @@ int reiserfs_unpack(struct inode *inode, struct file *filp) return 0; } - depth = reiserfs_write_lock_once(inode->i_sb); - /* we need to make sure nobody is changing the file size beneath us */ reiserfs_mutex_lock_safe(&inode->i_mutex, inode->i_sb); + reiserfs_write_lock(inode->i_sb); + write_from = inode->i_size & (blocksize - 1); /* if we are on a block boundary, we are already unpacked. */ if (write_from == 0) { @@ -221,6 +220,6 @@ int reiserfs_unpack(struct inode *inode, struct file *filp) out: mutex_unlock(&inode->i_mutex); - reiserfs_write_unlock_once(inode->i_sb, depth); + reiserfs_write_unlock(inode->i_sb); return retval; } diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c index 742fdd4c209a..73feacc49b2e 100644 --- a/fs/reiserfs/journal.c +++ b/fs/reiserfs/journal.c @@ -947,9 +947,11 @@ static int reiserfs_async_progress_wait(struct super_block *s) struct reiserfs_journal *j = SB_JOURNAL(s); if (atomic_read(&j->j_async_throttle)) { - reiserfs_write_unlock(s); + int depth; + + depth = reiserfs_write_unlock_nested(s); congestion_wait(BLK_RW_ASYNC, HZ / 10); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); } return 0; @@ -972,6 +974,7 @@ static int flush_commit_list(struct super_block *s, struct reiserfs_journal *journal = SB_JOURNAL(s); int retval = 0; int write_len; + int depth; reiserfs_check_lock_depth(s, "flush_commit_list"); @@ -1018,12 +1021,12 @@ static int flush_commit_list(struct super_block *s, * We might sleep in numerous places inside * write_ordered_buffers. Relax the write lock. */ - reiserfs_write_unlock(s); + depth = reiserfs_write_unlock_nested(s); ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, journal, jl, &jl->j_bh_list); if (ret < 0 && retval == 0) retval = ret; - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); } BUG_ON(!list_empty(&jl->j_bh_list)); /* @@ -1043,9 +1046,9 @@ static int flush_commit_list(struct super_block *s, tbh = journal_find_get_block(s, bn); if (tbh) { if (buffer_dirty(tbh)) { - reiserfs_write_unlock(s); + depth = reiserfs_write_unlock_nested(s); ll_rw_block(WRITE, 1, &tbh); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); } put_bh(tbh) ; } @@ -1057,17 +1060,17 @@ static int flush_commit_list(struct super_block *s, (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); tbh = journal_find_get_block(s, bn); - reiserfs_write_unlock(s); - wait_on_buffer(tbh); - reiserfs_write_lock(s); + depth = reiserfs_write_unlock_nested(s); + __wait_on_buffer(tbh); + reiserfs_write_lock_nested(s, depth); // since we're using ll_rw_blk above, it might have skipped over // a locked buffer. Double check here // /* redundant, sync_dirty_buffer() checks */ if (buffer_dirty(tbh)) { - reiserfs_write_unlock(s); + depth = reiserfs_write_unlock_nested(s); sync_dirty_buffer(tbh); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); } if (unlikely(!buffer_uptodate(tbh))) { #ifdef CONFIG_REISERFS_CHECK @@ -1091,12 +1094,12 @@ static int flush_commit_list(struct super_block *s, if (buffer_dirty(jl->j_commit_bh)) BUG(); mark_buffer_dirty(jl->j_commit_bh) ; - reiserfs_write_unlock(s); + depth = reiserfs_write_unlock_nested(s); if (reiserfs_barrier_flush(s)) __sync_dirty_buffer(jl->j_commit_bh, WRITE_FLUSH_FUA); else sync_dirty_buffer(jl->j_commit_bh); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); } /* If there was a write error in the journal - we can't commit this @@ -1228,15 +1231,16 @@ static int _update_journal_header_block(struct super_block *sb, { struct reiserfs_journal_header *jh; struct reiserfs_journal *journal = SB_JOURNAL(sb); + int depth; if (reiserfs_is_journal_aborted(journal)) return -EIO; if (trans_id >= journal->j_last_flush_trans_id) { if (buffer_locked((journal->j_header_bh))) { - reiserfs_write_unlock(sb); - wait_on_buffer((journal->j_header_bh)); - reiserfs_write_lock(sb); + depth = reiserfs_write_unlock_nested(sb); + __wait_on_buffer(journal->j_header_bh); + reiserfs_write_lock_nested(sb, depth); if (unlikely(!buffer_uptodate(journal->j_header_bh))) { #ifdef CONFIG_REISERFS_CHECK reiserfs_warning(sb, "journal-699", @@ -1254,14 +1258,14 @@ static int _update_journal_header_block(struct super_block *sb, jh->j_mount_id = cpu_to_le32(journal->j_mount_id); set_buffer_dirty(journal->j_header_bh); - reiserfs_write_unlock(sb); + depth = reiserfs_write_unlock_nested(sb); if (reiserfs_barrier_flush(sb)) __sync_dirty_buffer(journal->j_header_bh, WRITE_FLUSH_FUA); else sync_dirty_buffer(journal->j_header_bh); - reiserfs_write_lock(sb); + reiserfs_write_lock_nested(sb, depth); if (!buffer_uptodate(journal->j_header_bh)) { reiserfs_warning(sb, "journal-837", "IO error during journal replay"); @@ -1341,6 +1345,7 @@ static int flush_journal_list(struct super_block *s, unsigned long j_len_saved = jl->j_len; struct reiserfs_journal *journal = SB_JOURNAL(s); int err = 0; + int depth; BUG_ON(j_len_saved <= 0); @@ -1495,9 +1500,9 @@ static int flush_journal_list(struct super_block *s, "cn->bh is NULL"); } - reiserfs_write_unlock(s); - wait_on_buffer(cn->bh); - reiserfs_write_lock(s); + depth = reiserfs_write_unlock_nested(s); + __wait_on_buffer(cn->bh); + reiserfs_write_lock_nested(s, depth); if (!cn->bh) { reiserfs_panic(s, "journal-1012", @@ -1974,6 +1979,7 @@ static int journal_compare_desc_commit(struct super_block *sb, /* returns 0 if it did not find a description block ** returns -1 if it found a corrupt commit block ** returns 1 if both desc and commit were valid +** NOTE: only called during fs mount */ static int journal_transaction_is_valid(struct super_block *sb, struct buffer_head *d_bh, @@ -2073,8 +2079,9 @@ static void brelse_array(struct buffer_head **heads, int num) /* ** given the start, and values for the oldest acceptable transactions, -** this either reads in a replays a transaction, or returns because the transaction -** is invalid, or too old. +** this either reads in a replays a transaction, or returns because the +** transaction is invalid, or too old. +** NOTE: only called during fs mount */ static int journal_read_transaction(struct super_block *sb, unsigned long cur_dblock, @@ -2208,10 +2215,7 @@ static int journal_read_transaction(struct super_block *sb, ll_rw_block(READ, get_desc_trans_len(desc), log_blocks); for (i = 0; i < get_desc_trans_len(desc); i++) { - reiserfs_write_unlock(sb); wait_on_buffer(log_blocks[i]); - reiserfs_write_lock(sb); - if (!buffer_uptodate(log_blocks[i])) { reiserfs_warning(sb, "journal-1212", "REPLAY FAILURE fsck required! " @@ -2318,12 +2322,13 @@ static struct buffer_head *reiserfs_breada(struct block_device *dev, /* ** read and replay the log -** on a clean unmount, the journal header's next unflushed pointer will be to an invalid -** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast. -** -** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid. -** +** on a clean unmount, the journal header's next unflushed pointer will +** be to an invalid transaction. This tests that before finding all the +** transactions in the log, which makes normal mount times fast. +** After a crash, this starts with the next unflushed transaction, and +** replays until it finds one too old, or invalid. ** On exit, it sets things up so the first transaction will work correctly. +** NOTE: only called during fs mount */ static int journal_read(struct super_block *sb) { @@ -2501,14 +2506,18 @@ static int journal_read(struct super_block *sb) "replayed %d transactions in %lu seconds\n", replay_count, get_seconds() - start); } + /* needed to satisfy the locking in _update_journal_header_block */ + reiserfs_write_lock(sb); if (!bdev_read_only(sb->s_bdev) && _update_journal_header_block(sb, journal->j_start, journal->j_last_flush_trans_id)) { + reiserfs_write_unlock(sb); /* replay failed, caller must call free_journal_ram and abort ** the mount */ return -1; } + reiserfs_write_unlock(sb); return 0; } @@ -2828,13 +2837,7 @@ int journal_init(struct super_block *sb, const char *j_dev_name, goto free_and_return; } - /* - * Journal_read needs to be inspected in order to push down - * the lock further inside (or even remove it). - */ - reiserfs_write_lock(sb); ret = journal_read(sb); - reiserfs_write_unlock(sb); if (ret < 0) { reiserfs_warning(sb, "reiserfs-2006", "Replay Failure, unable to mount"); @@ -2923,9 +2926,9 @@ static void queue_log_writer(struct super_block *s) add_wait_queue(&journal->j_join_wait, &wait); set_current_state(TASK_UNINTERRUPTIBLE); if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) { - reiserfs_write_unlock(s); + int depth = reiserfs_write_unlock_nested(s); schedule(); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); } __set_current_state(TASK_RUNNING); remove_wait_queue(&journal->j_join_wait, &wait); @@ -2943,9 +2946,12 @@ static void let_transaction_grow(struct super_block *sb, unsigned int trans_id) struct reiserfs_journal *journal = SB_JOURNAL(sb); unsigned long bcount = journal->j_bcount; while (1) { - reiserfs_write_unlock(sb); + int depth; + + depth = reiserfs_write_unlock_nested(sb); schedule_timeout_uninterruptible(1); - reiserfs_write_lock(sb); + reiserfs_write_lock_nested(sb, depth); + journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; while ((atomic_read(&journal->j_wcount) > 0 || atomic_read(&journal->j_jlock)) && @@ -2976,6 +2982,7 @@ static int do_journal_begin_r(struct reiserfs_transaction_handle *th, struct reiserfs_transaction_handle myth; int sched_count = 0; int retval; + int depth; reiserfs_check_lock_depth(sb, "journal_begin"); BUG_ON(nblocks > journal->j_trans_max); @@ -2996,9 +3003,9 @@ static int do_journal_begin_r(struct reiserfs_transaction_handle *th, if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { unlock_journal(sb); - reiserfs_write_unlock(sb); + depth = reiserfs_write_unlock_nested(sb); reiserfs_wait_on_write_block(sb); - reiserfs_write_lock(sb); + reiserfs_write_lock_nested(sb, depth); PROC_INFO_INC(sb, journal.journal_relock_writers); goto relock; } @@ -3821,6 +3828,7 @@ void reiserfs_restore_prepared_buffer(struct super_block *sb, if (test_clear_buffer_journal_restore_dirty(bh) && buffer_journal_dirty(bh)) { struct reiserfs_journal_cnode *cn; + reiserfs_write_lock(sb); cn = get_journal_hash_dev(sb, journal->j_list_hash_table, bh->b_blocknr); @@ -3828,6 +3836,7 @@ void reiserfs_restore_prepared_buffer(struct super_block *sb, set_buffer_journal_test(bh); mark_buffer_dirty(bh); } + reiserfs_write_unlock(sb); } clear_buffer_journal_prepared(bh); } @@ -3911,6 +3920,7 @@ static int do_journal_end(struct reiserfs_transaction_handle *th, unsigned long jindex; unsigned int commit_trans_id; int trans_half; + int depth; BUG_ON(th->t_refcount > 1); BUG_ON(!th->t_trans_id); @@ -4116,9 +4126,7 @@ static int do_journal_end(struct reiserfs_transaction_handle *th, next = cn->next; free_cnode(sb, cn); cn = next; - reiserfs_write_unlock(sb); - cond_resched(); - reiserfs_write_lock(sb); + reiserfs_cond_resched(sb); } /* we are done with both the c_bh and d_bh, but @@ -4165,10 +4173,10 @@ static int do_journal_end(struct reiserfs_transaction_handle *th, * is lost. */ if (!list_empty(&jl->j_tail_bh_list)) { - reiserfs_write_unlock(sb); + depth = reiserfs_write_unlock_nested(sb); write_ordered_buffers(&journal->j_dirty_buffers_lock, journal, jl, &jl->j_tail_bh_list); - reiserfs_write_lock(sb); + reiserfs_write_lock_nested(sb, depth); } BUG_ON(!list_empty(&jl->j_tail_bh_list)); mutex_unlock(&jl->j_commit_mutex); diff --git a/fs/reiserfs/lock.c b/fs/reiserfs/lock.c index d735bc8470e3..045b83ef9fd9 100644 --- a/fs/reiserfs/lock.c +++ b/fs/reiserfs/lock.c @@ -48,30 +48,35 @@ void reiserfs_write_unlock(struct super_block *s) } } -/* - * If we already own the lock, just exit and don't increase the depth. - * Useful when we don't want to lock more than once. - * - * We always return the lock_depth we had before calling - * this function. - */ -int reiserfs_write_lock_once(struct super_block *s) +int __must_check reiserfs_write_unlock_nested(struct super_block *s) { struct reiserfs_sb_info *sb_i = REISERFS_SB(s); + int depth; - if (sb_i->lock_owner != current) { - mutex_lock(&sb_i->lock); - sb_i->lock_owner = current; - return sb_i->lock_depth++; - } + /* this can happen when the lock isn't always held */ + if (sb_i->lock_owner != current) + return -1; + + depth = sb_i->lock_depth; + + sb_i->lock_depth = -1; + sb_i->lock_owner = NULL; + mutex_unlock(&sb_i->lock); - return sb_i->lock_depth; + return depth; } -void reiserfs_write_unlock_once(struct super_block *s, int lock_depth) +void reiserfs_write_lock_nested(struct super_block *s, int depth) { - if (lock_depth == -1) - reiserfs_write_unlock(s); + struct reiserfs_sb_info *sb_i = REISERFS_SB(s); + + /* this can happen when the lock isn't always held */ + if (depth == -1) + return; + + mutex_lock(&sb_i->lock); + sb_i->lock_owner = current; + sb_i->lock_depth = depth; } /* @@ -82,9 +87,7 @@ void reiserfs_check_lock_depth(struct super_block *sb, char *caller) { struct reiserfs_sb_info *sb_i = REISERFS_SB(sb); - if (sb_i->lock_depth < 0) - reiserfs_panic(sb, "%s called without kernel lock held %d", - caller); + WARN_ON(sb_i->lock_depth < 0); } #ifdef CONFIG_REISERFS_CHECK diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c index 8567fb847601..dc5236f6de1b 100644 --- a/fs/reiserfs/namei.c +++ b/fs/reiserfs/namei.c @@ -325,7 +325,6 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) { int retval; - int lock_depth; struct inode *inode = NULL; struct reiserfs_dir_entry de; INITIALIZE_PATH(path_to_entry); @@ -333,12 +332,7 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry, if (REISERFS_MAX_NAME(dir->i_sb->s_blocksize) < dentry->d_name.len) return ERR_PTR(-ENAMETOOLONG); - /* - * Might be called with or without the write lock, must be careful - * to not recursively hold it in case we want to release the lock - * before rescheduling. - */ - lock_depth = reiserfs_write_lock_once(dir->i_sb); + reiserfs_write_lock(dir->i_sb); de.de_gen_number_bit_string = NULL; retval = @@ -349,7 +343,7 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry, inode = reiserfs_iget(dir->i_sb, (struct cpu_key *)&(de.de_dir_id)); if (!inode || IS_ERR(inode)) { - reiserfs_write_unlock_once(dir->i_sb, lock_depth); + reiserfs_write_unlock(dir->i_sb); return ERR_PTR(-EACCES); } @@ -358,7 +352,7 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry, if (IS_PRIVATE(dir)) inode->i_flags |= S_PRIVATE; } - reiserfs_write_unlock_once(dir->i_sb, lock_depth); + reiserfs_write_unlock(dir->i_sb); if (retval == IO_ERROR) { return ERR_PTR(-EIO); } @@ -727,7 +721,6 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode struct inode *inode; struct reiserfs_transaction_handle th; struct reiserfs_security_handle security; - int lock_depth; /* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */ int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3 + @@ -753,7 +746,7 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode return retval; } jbegin_count += retval; - lock_depth = reiserfs_write_lock_once(dir->i_sb); + reiserfs_write_lock(dir->i_sb); retval = journal_begin(&th, dir->i_sb, jbegin_count); if (retval) { @@ -804,7 +797,7 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode d_instantiate(dentry, inode); retval = journal_end(&th, dir->i_sb, jbegin_count); out_failed: - reiserfs_write_unlock_once(dir->i_sb, lock_depth); + reiserfs_write_unlock(dir->i_sb); return retval; } @@ -920,7 +913,6 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry) struct reiserfs_transaction_handle th; int jbegin_count; unsigned long savelink; - int depth; dquot_initialize(dir); @@ -934,7 +926,7 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry) JOURNAL_PER_BALANCE_CNT * 2 + 2 + 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); - depth = reiserfs_write_lock_once(dir->i_sb); + reiserfs_write_lock(dir->i_sb); retval = journal_begin(&th, dir->i_sb, jbegin_count); if (retval) goto out_unlink; @@ -995,7 +987,7 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry) retval = journal_end(&th, dir->i_sb, jbegin_count); reiserfs_check_path(&path); - reiserfs_write_unlock_once(dir->i_sb, depth); + reiserfs_write_unlock(dir->i_sb); return retval; end_unlink: @@ -1005,7 +997,7 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry) if (err) retval = err; out_unlink: - reiserfs_write_unlock_once(dir->i_sb, depth); + reiserfs_write_unlock(dir->i_sb); return retval; } diff --git a/fs/reiserfs/prints.c b/fs/reiserfs/prints.c index c0b1112ab7e3..54944d5a4a6e 100644 --- a/fs/reiserfs/prints.c +++ b/fs/reiserfs/prints.c @@ -358,12 +358,13 @@ void __reiserfs_panic(struct super_block *sb, const char *id, dump_stack(); #endif if (sb) - panic(KERN_WARNING "REISERFS panic (device %s): %s%s%s: %s\n", + printk(KERN_WARNING "REISERFS panic (device %s): %s%s%s: %s\n", sb->s_id, id ? id : "", id ? " " : "", function, error_buf); else - panic(KERN_WARNING "REISERFS panic: %s%s%s: %s\n", + printk(KERN_WARNING "REISERFS panic: %s%s%s: %s\n", id ? id : "", id ? " " : "", function, error_buf); + BUG(); } void __reiserfs_error(struct super_block *sb, const char *id, diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h index 3df5ce6c724d..f8adaee537c2 100644 --- a/fs/reiserfs/reiserfs.h +++ b/fs/reiserfs/reiserfs.h @@ -630,8 +630,8 @@ static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal */ void reiserfs_write_lock(struct super_block *s); void reiserfs_write_unlock(struct super_block *s); -int reiserfs_write_lock_once(struct super_block *s); -void reiserfs_write_unlock_once(struct super_block *s, int lock_depth); +int __must_check reiserfs_write_unlock_nested(struct super_block *s); +void reiserfs_write_lock_nested(struct super_block *s, int depth); #ifdef CONFIG_REISERFS_CHECK void reiserfs_lock_check_recursive(struct super_block *s); @@ -667,31 +667,33 @@ static inline void reiserfs_lock_check_recursive(struct super_block *s) { } * - The inode mutex */ static inline void reiserfs_mutex_lock_safe(struct mutex *m, - struct super_block *s) + struct super_block *s) { - reiserfs_lock_check_recursive(s); - reiserfs_write_unlock(s); + int depth; + + depth = reiserfs_write_unlock_nested(s); mutex_lock(m); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); } static inline void reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass, - struct super_block *s) + struct super_block *s) { - reiserfs_lock_check_recursive(s); - reiserfs_write_unlock(s); + int depth; + + depth = reiserfs_write_unlock_nested(s); mutex_lock_nested(m, subclass); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); } static inline void reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s) { - reiserfs_lock_check_recursive(s); - reiserfs_write_unlock(s); - down_read(sem); - reiserfs_write_lock(s); + int depth; + depth = reiserfs_write_unlock_nested(s); + down_read(sem); + reiserfs_write_lock_nested(s, depth); } /* @@ -701,9 +703,11 @@ reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s) static inline void reiserfs_cond_resched(struct super_block *s) { if (need_resched()) { - reiserfs_write_unlock(s); + int depth; + + depth = reiserfs_write_unlock_nested(s); schedule(); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); } } diff --git a/fs/reiserfs/resize.c b/fs/reiserfs/resize.c index 3ce02cff5e90..a4ef5cd606eb 100644 --- a/fs/reiserfs/resize.c +++ b/fs/reiserfs/resize.c @@ -34,6 +34,7 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new) unsigned long int block_count, free_blocks; int i; int copy_size; + int depth; sb = SB_DISK_SUPER_BLOCK(s); @@ -43,7 +44,9 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new) } /* check the device size */ + depth = reiserfs_write_unlock_nested(s); bh = sb_bread(s, block_count_new - 1); + reiserfs_write_lock_nested(s, depth); if (!bh) { printk("reiserfs_resize: can\'t read last block\n"); return -EINVAL; @@ -125,9 +128,12 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new) * transaction begins, and the new bitmaps don't matter if the * transaction fails. */ for (i = bmap_nr; i < bmap_nr_new; i++) { + int depth; /* don't use read_bitmap_block since it will cache * the uninitialized bitmap */ + depth = reiserfs_write_unlock_nested(s); bh = sb_bread(s, i * s->s_blocksize * 8); + reiserfs_write_lock_nested(s, depth); if (!bh) { vfree(bitmap); return -EIO; @@ -138,9 +144,9 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new) set_buffer_uptodate(bh); mark_buffer_dirty(bh); - reiserfs_write_unlock(s); + depth = reiserfs_write_unlock_nested(s); sync_dirty_buffer(bh); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(s, depth); // update bitmap_info stuff bitmap[i].free_count = sb_blocksize(sb) * 8 - 1; brelse(bh); diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c index 2f40a4c70a4d..b14706a05d52 100644 --- a/fs/reiserfs/stree.c +++ b/fs/reiserfs/stree.c @@ -524,14 +524,14 @@ static int is_tree_node(struct buffer_head *bh, int level) * the caller (search_by_key) will perform other schedule-unsafe * operations just after calling this function. * - * @return true if we have unlocked + * @return depth of lock to be restored after read completes */ -static bool search_by_key_reada(struct super_block *s, +static int search_by_key_reada(struct super_block *s, struct buffer_head **bh, b_blocknr_t *b, int num) { int i, j; - bool unlocked = false; + int depth = -1; for (i = 0; i < num; i++) { bh[i] = sb_getblk(s, b[i]); @@ -549,15 +549,13 @@ static bool search_by_key_reada(struct super_block *s, * you have to make sure the prepared bit isn't set on this buffer */ if (!buffer_uptodate(bh[j])) { - if (!unlocked) { - reiserfs_write_unlock(s); - unlocked = true; - } + if (depth == -1) + depth = reiserfs_write_unlock_nested(s); ll_rw_block(READA, 1, bh + j); } brelse(bh[j]); } - return unlocked; + return depth; } /************************************************************************** @@ -645,26 +643,26 @@ int search_by_key(struct super_block *sb, const struct cpu_key *key, /* Key to s have a pointer to it. */ if ((bh = last_element->pe_buffer = sb_getblk(sb, block_number))) { - bool unlocked = false; - if (!buffer_uptodate(bh) && reada_count > 1) - /* may unlock the write lock */ - unlocked = search_by_key_reada(sb, reada_bh, - reada_blocks, reada_count); /* - * If we haven't already unlocked the write lock, - * then we need to do that here before reading - * the current block + * We'll need to drop the lock if we encounter any + * buffers that need to be read. If all of them are + * already up to date, we don't need to drop the lock. */ - if (!buffer_uptodate(bh) && !unlocked) { - reiserfs_write_unlock(sb); - unlocked = true; - } + int depth = -1; + + if (!buffer_uptodate(bh) && reada_count > 1) + depth = search_by_key_reada(sb, reada_bh, + reada_blocks, reada_count); + + if (!buffer_uptodate(bh) && depth == -1) + depth = reiserfs_write_unlock_nested(sb); + ll_rw_block(READ, 1, &bh); wait_on_buffer(bh); - if (unlocked) - reiserfs_write_lock(sb); + if (depth != -1) + reiserfs_write_lock_nested(sb, depth); if (!buffer_uptodate(bh)) goto io_error; } else { @@ -1059,9 +1057,7 @@ static char prepare_for_delete_or_cut(struct reiserfs_transaction_handle *th, st reiserfs_free_block(th, inode, block, 1); } - reiserfs_write_unlock(sb); - cond_resched(); - reiserfs_write_lock(sb); + reiserfs_cond_resched(sb); if (item_moved (&s_ih, path)) { need_re_search = 1; @@ -1190,6 +1186,7 @@ int reiserfs_delete_item(struct reiserfs_transaction_handle *th, struct item_head *q_ih; int quota_cut_bytes; int ret_value, del_size, removed; + int depth; #ifdef CONFIG_REISERFS_CHECK char mode; @@ -1299,7 +1296,9 @@ int reiserfs_delete_item(struct reiserfs_transaction_handle *th, "reiserquota delete_item(): freeing %u, id=%u type=%c", quota_cut_bytes, inode->i_uid, head2type(&s_ih)); #endif + depth = reiserfs_write_unlock_nested(inode->i_sb); dquot_free_space_nodirty(inode, quota_cut_bytes); + reiserfs_write_lock_nested(inode->i_sb, depth); /* Return deleted body length */ return ret_value; @@ -1325,6 +1324,7 @@ int reiserfs_delete_item(struct reiserfs_transaction_handle *th, void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th, struct inode *inode, struct reiserfs_key *key) { + struct super_block *sb = th->t_super; struct tree_balance tb; INITIALIZE_PATH(path); int item_len = 0; @@ -1377,14 +1377,17 @@ void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th, if (retval == CARRY_ON) { do_balance(&tb, NULL, NULL, M_DELETE); if (inode) { /* Should we count quota for item? (we don't count quotas for save-links) */ + int depth; #ifdef REISERQUOTA_DEBUG reiserfs_debug(th->t_super, REISERFS_DEBUG_CODE, "reiserquota delete_solid_item(): freeing %u id=%u type=%c", quota_cut_bytes, inode->i_uid, key2type(key)); #endif + depth = reiserfs_write_unlock_nested(sb); dquot_free_space_nodirty(inode, quota_cut_bytes); + reiserfs_write_lock_nested(sb, depth); } break; } @@ -1561,6 +1564,7 @@ int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th, int retval2 = -1; int quota_cut_bytes; loff_t tail_pos = 0; + int depth; BUG_ON(!th->t_trans_id); @@ -1733,7 +1737,9 @@ int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th, "reiserquota cut_from_item(): freeing %u id=%u type=%c", quota_cut_bytes, inode->i_uid, '?'); #endif + depth = reiserfs_write_unlock_nested(sb); dquot_free_space_nodirty(inode, quota_cut_bytes); + reiserfs_write_lock_nested(sb, depth); return ret_value; } @@ -1953,9 +1959,11 @@ int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct tree const char *body, /* Pointer to the bytes to paste. */ int pasted_size) { /* Size of pasted bytes. */ + struct super_block *sb = inode->i_sb; struct tree_balance s_paste_balance; int retval; int fs_gen; + int depth; BUG_ON(!th->t_trans_id); @@ -1968,9 +1976,9 @@ int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct tree key2type(&(key->on_disk_key))); #endif - reiserfs_write_unlock(inode->i_sb); + depth = reiserfs_write_unlock_nested(sb); retval = dquot_alloc_space_nodirty(inode, pasted_size); - reiserfs_write_lock(inode->i_sb); + reiserfs_write_lock_nested(sb, depth); if (retval) { pathrelse(search_path); return retval; @@ -2027,7 +2035,9 @@ int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct tree pasted_size, inode->i_uid, key2type(&(key->on_disk_key))); #endif + depth = reiserfs_write_unlock_nested(sb); dquot_free_space_nodirty(inode, pasted_size); + reiserfs_write_lock_nested(sb, depth); return retval; } @@ -2050,6 +2060,7 @@ int reiserfs_insert_item(struct reiserfs_transaction_handle *th, BUG_ON(!th->t_trans_id); if (inode) { /* Do we count quotas for item? */ + int depth; fs_gen = get_generation(inode->i_sb); quota_bytes = ih_item_len(ih); @@ -2063,11 +2074,11 @@ int reiserfs_insert_item(struct reiserfs_transaction_handle *th, "reiserquota insert_item(): allocating %u id=%u type=%c", quota_bytes, inode->i_uid, head2type(ih)); #endif - reiserfs_write_unlock(inode->i_sb); /* We can't dirty inode here. It would be immediately written but * appropriate stat item isn't inserted yet... */ + depth = reiserfs_write_unlock_nested(inode->i_sb); retval = dquot_alloc_space_nodirty(inode, quota_bytes); - reiserfs_write_lock(inode->i_sb); + reiserfs_write_lock_nested(inode->i_sb, depth); if (retval) { pathrelse(path); return retval; @@ -2118,7 +2129,10 @@ int reiserfs_insert_item(struct reiserfs_transaction_handle *th, "reiserquota insert_item(): freeing %u id=%u type=%c", quota_bytes, inode->i_uid, head2type(ih)); #endif - if (inode) + if (inode) { + int depth = reiserfs_write_unlock_nested(inode->i_sb); dquot_free_space_nodirty(inode, quota_bytes); + reiserfs_write_lock_nested(inode->i_sb, depth); + } return retval; } diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index e2e202a07b31..3ead145dadc4 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -243,6 +243,7 @@ static int finish_unfinished(struct super_block *s) done = 0; REISERFS_SB(s)->s_is_unlinked_ok = 1; while (!retval) { + int depth; retval = search_item(s, &max_cpu_key, &path); if (retval != ITEM_NOT_FOUND) { reiserfs_error(s, "vs-2140", @@ -298,9 +299,9 @@ static int finish_unfinished(struct super_block *s) retval = remove_save_link_only(s, &save_link_key, 0); continue; } - reiserfs_write_unlock(s); + depth = reiserfs_write_unlock_nested(inode->i_sb); dquot_initialize(inode); - reiserfs_write_lock(s); + reiserfs_write_lock_nested(inode->i_sb, depth); if (truncate && S_ISDIR(inode->i_mode)) { /* We got a truncate request for a dir which is impossible. @@ -356,10 +357,12 @@ static int finish_unfinished(struct super_block *s) #ifdef CONFIG_QUOTA /* Turn quotas off */ + reiserfs_write_unlock(s); for (i = 0; i < MAXQUOTAS; i++) { if (sb_dqopt(s)->files[i] && quota_enabled[i]) dquot_quota_off(s, i); } + reiserfs_write_lock(s); if (ms_active_set) /* Restore the flag back */ s->s_flags &= ~MS_ACTIVE; @@ -623,7 +626,6 @@ static void reiserfs_dirty_inode(struct inode *inode, int flags) struct reiserfs_transaction_handle th; int err = 0; - int lock_depth; if (inode->i_sb->s_flags & MS_RDONLY) { reiserfs_warning(inode->i_sb, "clm-6006", @@ -631,7 +633,7 @@ static void reiserfs_dirty_inode(struct inode *inode, int flags) inode->i_ino); return; } - lock_depth = reiserfs_write_lock_once(inode->i_sb); + reiserfs_write_lock(inode->i_sb); /* this is really only used for atime updates, so they don't have ** to be included in O_SYNC or fsync @@ -644,7 +646,7 @@ static void reiserfs_dirty_inode(struct inode *inode, int flags) journal_end(&th, inode->i_sb, 1); out: - reiserfs_write_unlock_once(inode->i_sb, lock_depth); + reiserfs_write_unlock(inode->i_sb); } static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) @@ -1334,7 +1336,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) kfree(qf_names[i]); #endif err = -EINVAL; - goto out_unlock; + goto out_err_unlock; } #ifdef CONFIG_QUOTA handle_quota_files(s, qf_names, &qfmt); @@ -1378,35 +1380,32 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) if (blocks) { err = reiserfs_resize(s, blocks); if (err != 0) - goto out_unlock; + goto out_err_unlock; } if (*mount_flags & MS_RDONLY) { + reiserfs_write_unlock(s); reiserfs_xattr_init(s, *mount_flags); /* remount read-only */ if (s->s_flags & MS_RDONLY) /* it is read-only already */ - goto out_ok; + goto out_ok_unlocked; - /* - * Drop write lock. Quota will retake it when needed and lock - * ordering requires calling dquot_suspend() without it. - */ - reiserfs_write_unlock(s); err = dquot_suspend(s, -1); if (err < 0) goto out_err; - reiserfs_write_lock(s); /* try to remount file system with read-only permissions */ if (sb_umount_state(rs) == REISERFS_VALID_FS || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { - goto out_ok; + goto out_ok_unlocked; } + reiserfs_write_lock(s); + err = journal_begin(&th, s, 10); if (err) - goto out_unlock; + goto out_err_unlock; /* Mounting a rw partition read-only. */ reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); @@ -1415,13 +1414,14 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) } else { /* remount read-write */ if (!(s->s_flags & MS_RDONLY)) { + reiserfs_write_unlock(s); reiserfs_xattr_init(s, *mount_flags); - goto out_ok; /* We are read-write already */ + goto out_ok_unlocked; /* We are read-write already */ } if (reiserfs_is_journal_aborted(journal)) { err = journal->j_errno; - goto out_unlock; + goto out_err_unlock; } handle_data_mode(s, mount_options); @@ -1430,7 +1430,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ err = journal_begin(&th, s, 10); if (err) - goto out_unlock; + goto out_err_unlock; /* Mount a partition which is read-only, read-write */ reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); @@ -1447,26 +1447,22 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) SB_JOURNAL(s)->j_must_wait = 1; err = journal_end(&th, s, 10); if (err) - goto out_unlock; + goto out_err_unlock; + reiserfs_write_unlock(s); if (!(*mount_flags & MS_RDONLY)) { - /* - * Drop write lock. Quota will retake it when needed and lock - * ordering requires calling dquot_resume() without it. - */ - reiserfs_write_unlock(s); dquot_resume(s, -1); reiserfs_write_lock(s); finish_unfinished(s); + reiserfs_write_unlock(s); reiserfs_xattr_init(s, *mount_flags); } -out_ok: +out_ok_unlocked: replace_mount_options(s, new_opts); - reiserfs_write_unlock(s); return 0; -out_unlock: +out_err_unlock: reiserfs_write_unlock(s); out_err: kfree(new_opts); @@ -2013,12 +2009,14 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent) goto error; } + reiserfs_write_unlock(s); if ((errval = reiserfs_lookup_privroot(s)) || (errval = reiserfs_xattr_init(s, s->s_flags))) { dput(s->s_root); s->s_root = NULL; - goto error; + goto error_unlocked; } + reiserfs_write_lock(s); /* look for files which were to be removed in previous session */ finish_unfinished(s); @@ -2027,12 +2025,14 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent) reiserfs_info(s, "using 3.5.x disk format\n"); } + reiserfs_write_unlock(s); if ((errval = reiserfs_lookup_privroot(s)) || (errval = reiserfs_xattr_init(s, s->s_flags))) { dput(s->s_root); s->s_root = NULL; - goto error; + goto error_unlocked; } + reiserfs_write_lock(s); } // mark hash in super block: it could be unset. overwrite should be ok set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); @@ -2100,6 +2100,7 @@ static int reiserfs_write_dquot(struct dquot *dquot) { struct reiserfs_transaction_handle th; int ret, err; + int depth; reiserfs_write_lock(dquot->dq_sb); ret = @@ -2107,9 +2108,9 @@ static int reiserfs_write_dquot(struct dquot *dquot) REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); if (ret) goto out; - reiserfs_write_unlock(dquot->dq_sb); + depth = reiserfs_write_unlock_nested(dquot->dq_sb); ret = dquot_commit(dquot); - reiserfs_write_lock(dquot->dq_sb); + reiserfs_write_lock_nested(dquot->dq_sb, depth); err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); @@ -2124,6 +2125,7 @@ static int reiserfs_acquire_dquot(struct dquot *dquot) { struct reiserfs_transaction_handle th; int ret, err; + int depth; reiserfs_write_lock(dquot->dq_sb); ret = @@ -2131,9 +2133,9 @@ static int reiserfs_acquire_dquot(struct dquot *dquot) REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); if (ret) goto out; - reiserfs_write_unlock(dquot->dq_sb); + depth = reiserfs_write_unlock_nested(dquot->dq_sb); ret = dquot_acquire(dquot); - reiserfs_write_lock(dquot->dq_sb); + reiserfs_write_lock_nested(dquot->dq_sb, depth); err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); @@ -2186,15 +2188,16 @@ static int reiserfs_write_info(struct super_block *sb, int type) { struct reiserfs_transaction_handle th; int ret, err; + int depth; /* Data block + inode block */ reiserfs_write_lock(sb); ret = journal_begin(&th, sb, 2); if (ret) goto out; - reiserfs_write_unlock(sb); + depth = reiserfs_write_unlock_nested(sb); ret = dquot_commit_info(sb, type); - reiserfs_write_lock(sb); + reiserfs_write_lock_nested(sb, depth); err = journal_end(&th, sb, 2); if (!ret && err) ret = err; diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c index c69cdd749f09..8a9e2dcfe004 100644 --- a/fs/reiserfs/xattr.c +++ b/fs/reiserfs/xattr.c @@ -81,8 +81,7 @@ static int xattr_unlink(struct inode *dir, struct dentry *dentry) int error; BUG_ON(!mutex_is_locked(&dir->i_mutex)); - reiserfs_mutex_lock_nested_safe(&dentry->d_inode->i_mutex, - I_MUTEX_CHILD, dir->i_sb); + mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD); error = dir->i_op->unlink(dir, dentry); mutex_unlock(&dentry->d_inode->i_mutex); @@ -96,8 +95,7 @@ static int xattr_rmdir(struct inode *dir, struct dentry *dentry) int error; BUG_ON(!mutex_is_locked(&dir->i_mutex)); - reiserfs_mutex_lock_nested_safe(&dentry->d_inode->i_mutex, - I_MUTEX_CHILD, dir->i_sb); + mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD); error = dir->i_op->rmdir(dir, dentry); if (!error) dentry->d_inode->i_flags |= S_DEAD; @@ -232,22 +230,17 @@ static int reiserfs_for_each_xattr(struct inode *inode, if (IS_PRIVATE(inode) || get_inode_sd_version(inode) == STAT_DATA_V1) return 0; - reiserfs_write_unlock(inode->i_sb); dir = open_xa_dir(inode, XATTR_REPLACE); if (IS_ERR(dir)) { err = PTR_ERR(dir); - reiserfs_write_lock(inode->i_sb); goto out; } else if (!dir->d_inode) { err = 0; - reiserfs_write_lock(inode->i_sb); goto out_dir; } mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_XATTR); - reiserfs_write_lock(inode->i_sb); - buf.xadir = dir; while (1) { err = reiserfs_readdir_inode(dir->d_inode, &buf.ctx); @@ -281,14 +274,17 @@ static int reiserfs_for_each_xattr(struct inode *inode, int blocks = JOURNAL_PER_BALANCE_CNT * 2 + 2 + 4 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb); struct reiserfs_transaction_handle th; + reiserfs_write_lock(inode->i_sb); err = journal_begin(&th, inode->i_sb, blocks); + reiserfs_write_unlock(inode->i_sb); if (!err) { int jerror; - reiserfs_mutex_lock_nested_safe( - &dir->d_parent->d_inode->i_mutex, - I_MUTEX_XATTR, inode->i_sb); + mutex_lock_nested(&dir->d_parent->d_inode->i_mutex, + I_MUTEX_XATTR); err = action(dir, data); + reiserfs_write_lock(inode->i_sb); jerror = journal_end(&th, inode->i_sb, blocks); + reiserfs_write_unlock(inode->i_sb); mutex_unlock(&dir->d_parent->d_inode->i_mutex); err = jerror ?: err; } @@ -455,9 +451,7 @@ static int lookup_and_delete_xattr(struct inode *inode, const char *name) } if (dentry->d_inode) { - reiserfs_write_lock(inode->i_sb); err = xattr_unlink(xadir->d_inode, dentry); - reiserfs_write_unlock(inode->i_sb); update_ctime(inode); } @@ -491,24 +485,17 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th, if (get_inode_sd_version(inode) == STAT_DATA_V1) return -EOPNOTSUPP; - reiserfs_write_unlock(inode->i_sb); - if (!buffer) { err = lookup_and_delete_xattr(inode, name); - reiserfs_write_lock(inode->i_sb); return err; } dentry = xattr_lookup(inode, name, flags); - if (IS_ERR(dentry)) { - reiserfs_write_lock(inode->i_sb); + if (IS_ERR(dentry)) return PTR_ERR(dentry); - } down_write(&REISERFS_I(inode)->i_xattr_sem); - reiserfs_write_lock(inode->i_sb); - xahash = xattr_hash(buffer, buffer_size); while (buffer_pos < buffer_size || buffer_pos == 0) { size_t chunk; @@ -538,6 +525,7 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th, rxh->h_hash = cpu_to_le32(xahash); } + reiserfs_write_lock(inode->i_sb); err = __reiserfs_write_begin(page, page_offset, chunk + skip); if (!err) { if (buffer) @@ -546,6 +534,7 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th, page_offset + chunk + skip); } + reiserfs_write_unlock(inode->i_sb); unlock_page(page); reiserfs_put_page(page); buffer_pos += chunk; @@ -563,10 +552,8 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th, .ia_valid = ATTR_SIZE | ATTR_CTIME, }; - reiserfs_write_unlock(inode->i_sb); mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_XATTR); inode_dio_wait(dentry->d_inode); - reiserfs_write_lock(inode->i_sb); err = reiserfs_setattr(dentry, &newattrs); mutex_unlock(&dentry->d_inode->i_mutex); @@ -592,18 +579,19 @@ int reiserfs_xattr_set(struct inode *inode, const char *name, reiserfs_write_lock(inode->i_sb); error = journal_begin(&th, inode->i_sb, jbegin_count); + reiserfs_write_unlock(inode->i_sb); if (error) { - reiserfs_write_unlock(inode->i_sb); return error; } error = reiserfs_xattr_set_handle(&th, inode, name, buffer, buffer_size, flags); + reiserfs_write_lock(inode->i_sb); error2 = journal_end(&th, inode->i_sb, jbegin_count); + reiserfs_write_unlock(inode->i_sb); if (error == 0) error = error2; - reiserfs_write_unlock(inode->i_sb); return error; } @@ -968,7 +956,7 @@ int reiserfs_lookup_privroot(struct super_block *s) int err = 0; /* If we don't have the privroot located yet - go find it */ - reiserfs_mutex_lock_safe(&s->s_root->d_inode->i_mutex, s); + mutex_lock(&s->s_root->d_inode->i_mutex); dentry = lookup_one_len(PRIVROOT_NAME, s->s_root, strlen(PRIVROOT_NAME)); if (!IS_ERR(dentry)) { @@ -996,14 +984,14 @@ int reiserfs_xattr_init(struct super_block *s, int mount_flags) goto error; if (!privroot->d_inode && !(mount_flags & MS_RDONLY)) { - reiserfs_mutex_lock_safe(&s->s_root->d_inode->i_mutex, s); + mutex_lock(&s->s_root->d_inode->i_mutex); err = create_privroot(REISERFS_SB(s)->priv_root); mutex_unlock(&s->s_root->d_inode->i_mutex); } if (privroot->d_inode) { s->s_xattr = reiserfs_xattr_handlers; - reiserfs_mutex_lock_safe(&privroot->d_inode->i_mutex, s); + mutex_lock(&privroot->d_inode->i_mutex); if (!REISERFS_SB(s)->xattr_root) { struct dentry *dentry; dentry = lookup_one_len(XAROOT_NAME, privroot, diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index 6c8767fdfc6a..06c04f73da65 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -49,13 +49,15 @@ posix_acl_set(struct dentry *dentry, const char *name, const void *value, reiserfs_write_lock(inode->i_sb); error = journal_begin(&th, inode->i_sb, jcreate_blocks); + reiserfs_write_unlock(inode->i_sb); if (error == 0) { error = reiserfs_set_acl(&th, inode, type, acl); + reiserfs_write_lock(inode->i_sb); error2 = journal_end(&th, inode->i_sb, jcreate_blocks); + reiserfs_write_unlock(inode->i_sb); if (error2) error = error2; } - reiserfs_write_unlock(inode->i_sb); release_and_out: posix_acl_release(acl); @@ -435,12 +437,14 @@ int reiserfs_cache_default_acl(struct inode *inode) return nblocks; } +/* + * Called under i_mutex + */ int reiserfs_acl_chmod(struct inode *inode) { struct reiserfs_transaction_handle th; struct posix_acl *acl; size_t size; - int depth; int error; if (IS_PRIVATE(inode)) @@ -454,9 +458,7 @@ int reiserfs_acl_chmod(struct inode *inode) return 0; } - reiserfs_write_unlock(inode->i_sb); acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS); - reiserfs_write_lock(inode->i_sb); if (!acl) return 0; if (IS_ERR(acl)) @@ -466,16 +468,18 @@ int reiserfs_acl_chmod(struct inode *inode) return error; size = reiserfs_xattr_nblocks(inode, reiserfs_acl_size(acl->a_count)); - depth = reiserfs_write_lock_once(inode->i_sb); + reiserfs_write_lock(inode->i_sb); error = journal_begin(&th, inode->i_sb, size * 2); + reiserfs_write_unlock(inode->i_sb); if (!error) { int error2; error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS, acl); + reiserfs_write_lock(inode->i_sb); error2 = journal_end(&th, inode->i_sb, size * 2); + reiserfs_write_unlock(inode->i_sb); if (error2) error = error2; } - reiserfs_write_unlock_once(inode->i_sb, depth); posix_acl_release(acl); return error; } diff --git a/fs/stat.c b/fs/stat.c index 04ce1ac20d20..d0ea7ef75e26 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -447,9 +447,8 @@ void inode_add_bytes(struct inode *inode, loff_t bytes) EXPORT_SYMBOL(inode_add_bytes); -void inode_sub_bytes(struct inode *inode, loff_t bytes) +void __inode_sub_bytes(struct inode *inode, loff_t bytes) { - spin_lock(&inode->i_lock); inode->i_blocks -= bytes >> 9; bytes &= 511; if (inode->i_bytes < bytes) { @@ -457,6 +456,14 @@ void inode_sub_bytes(struct inode *inode, loff_t bytes) inode->i_bytes += 512; } inode->i_bytes -= bytes; +} + +EXPORT_SYMBOL(__inode_sub_bytes); + +void inode_sub_bytes(struct inode *inode, loff_t bytes) +{ + spin_lock(&inode->i_lock); + __inode_sub_bytes(inode, bytes); spin_unlock(&inode->i_lock); } diff --git a/fs/super.c b/fs/super.c index 68307c029228..5536a95186e2 100644 --- a/fs/super.c +++ b/fs/super.c @@ -152,15 +152,9 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags) static const struct super_operations default_op; if (s) { - if (security_sb_alloc(s)) { - /* - * We cannot call security_sb_free() without - * security_sb_alloc() succeeding. So bail out manually - */ - kfree(s); - s = NULL; - goto out; - } + if (security_sb_alloc(s)) + goto out_free_sb; + #ifdef CONFIG_SMP s->s_files = alloc_percpu(struct list_head); if (!s->s_files) @@ -228,6 +222,7 @@ err_out: free_percpu(s->s_files); #endif destroy_sb_writers(s); +out_free_sb: kfree(s); s = NULL; goto out; @@ -414,6 +409,11 @@ void generic_shutdown_super(struct super_block *sb) evict_inodes(sb); + if (sb->s_dio_done_wq) { + destroy_workqueue(sb->s_dio_done_wq); + sb->s_dio_done_wq = NULL; + } + if (sop->put_super) sop->put_super(sb); diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c index 15c68f9489ae..c590cabd57bb 100644 --- a/fs/sysfs/bin.c +++ b/fs/sysfs/bin.c @@ -22,8 +22,7 @@ #include <linux/slab.h> #include <linux/mutex.h> #include <linux/mm.h> - -#include <asm/uaccess.h> +#include <linux/uaccess.h> #include "sysfs.h" @@ -391,7 +390,7 @@ out_unlock: return rc; } -static int open(struct inode * inode, struct file * file) +static int open(struct inode *inode, struct file *file) { struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata; struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr; @@ -435,7 +434,7 @@ static int open(struct inode * inode, struct file * file) return error; } -static int release(struct inode * inode, struct file * file) +static int release(struct inode *inode, struct file *file) { struct bin_buffer *bb = file->private_data; @@ -481,7 +480,6 @@ void unmap_bin_file(struct sysfs_dirent *attr_sd) * @kobj: object. * @attr: attribute descriptor. */ - int sysfs_create_bin_file(struct kobject *kobj, const struct bin_attribute *attr) { @@ -489,19 +487,16 @@ int sysfs_create_bin_file(struct kobject *kobj, return sysfs_add_file(kobj->sd, &attr->attr, SYSFS_KOBJ_BIN_ATTR); } - +EXPORT_SYMBOL_GPL(sysfs_create_bin_file); /** * sysfs_remove_bin_file - remove binary file for object. * @kobj: object. * @attr: attribute descriptor. */ - void sysfs_remove_bin_file(struct kobject *kobj, const struct bin_attribute *attr) { sysfs_hash_and_remove(kobj->sd, NULL, attr->attr.name); } - -EXPORT_SYMBOL_GPL(sysfs_create_bin_file); EXPORT_SYMBOL_GPL(sysfs_remove_bin_file); diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index e068e744dbdd..4d83cedb9fcb 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -46,7 +46,7 @@ static unsigned int sysfs_name_hash(const void *ns, const char *name) unsigned int len = strlen(name); while (len--) hash = partial_name_hash(*name++, hash); - hash = ( end_name_hash(hash) ^ hash_ptr( (void *)ns, 31 ) ); + hash = (end_name_hash(hash) ^ hash_ptr((void *)ns, 31)); hash &= 0x7fffffffU; /* Reserve hash numbers 0, 1 and INT_MAX for magic directory entries */ if (hash < 1) @@ -258,7 +258,7 @@ static void sysfs_free_ino(unsigned int ino) spin_unlock(&sysfs_ino_lock); } -void release_sysfs_dirent(struct sysfs_dirent * sd) +void release_sysfs_dirent(struct sysfs_dirent *sd) { struct sysfs_dirent *parent_sd; @@ -297,7 +297,6 @@ static int sysfs_dentry_delete(const struct dentry *dentry) static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags) { struct sysfs_dirent *sd; - int is_dir; int type; if (flags & LOOKUP_RCU) @@ -341,18 +340,15 @@ out_bad: * is performed at its new name the dentry will be readded * to the dcache hashes. */ - is_dir = (sysfs_type(sd) == SYSFS_DIR); mutex_unlock(&sysfs_mutex); - if (is_dir) { - /* If we have submounts we must allow the vfs caches - * to lie about the state of the filesystem to prevent - * leaks and other nasty things. - */ - if (have_submounts(dentry)) - goto out_valid; - shrink_dcache_parent(dentry); - } - d_drop(dentry); + + /* If we have submounts we must allow the vfs caches + * to lie about the state of the filesystem to prevent + * leaks and other nasty things. + */ + if (check_submounts_and_drop(dentry) != 0) + goto out_valid; + return 0; } @@ -451,7 +447,7 @@ int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd) if (!!sysfs_ns_type(acxt->parent_sd) != !!sd->s_ns) { WARN(1, KERN_WARNING "sysfs: ns %s in '%s' for '%s'\n", - sysfs_ns_type(acxt->parent_sd)? "required": "invalid", + sysfs_ns_type(acxt->parent_sd) ? "required" : "invalid", acxt->parent_sd->s_name, sd->s_name); return -EINVAL; } @@ -619,7 +615,7 @@ struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd, if (!!sysfs_ns_type(parent_sd) != !!ns) { WARN(1, KERN_WARNING "sysfs: ns %s in '%s' for '%s'\n", - sysfs_ns_type(parent_sd)? "required": "invalid", + sysfs_ns_type(parent_sd) ? "required" : "invalid", parent_sd->s_name, name); return NULL; } @@ -674,7 +670,7 @@ static int create_dir(struct kobject *kobj, struct sysfs_dirent *parent_sd, enum kobj_ns_type type, const void *ns, const char *name, struct sysfs_dirent **p_sd) { - umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO; + umode_t mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO; struct sysfs_addrm_cxt acxt; struct sysfs_dirent *sd; int rc; @@ -735,9 +731,9 @@ static enum kobj_ns_type sysfs_read_ns_type(struct kobject *kobj) /** * sysfs_create_dir - create a directory for an object. - * @kobj: object we're creating directory for. + * @kobj: object we're creating directory for. */ -int sysfs_create_dir(struct kobject * kobj) +int sysfs_create_dir(struct kobject *kobj) { enum kobj_ns_type type; struct sysfs_dirent *parent_sd, *sd; @@ -764,8 +760,8 @@ int sysfs_create_dir(struct kobject * kobj) return error; } -static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry, - unsigned int flags) +static struct dentry *sysfs_lookup(struct inode *dir, struct dentry *dentry, + unsigned int flags) { struct dentry *ret = NULL; struct dentry *parent = dentry->d_parent; @@ -857,7 +853,7 @@ static void __sysfs_remove_dir(struct sysfs_dirent *dir_sd) * what used to be sysfs_rmdir() below, instead of calling separately. */ -void sysfs_remove_dir(struct kobject * kobj) +void sysfs_remove_dir(struct kobject *kobj) { struct sysfs_dirent *sd = kobj->sd; @@ -896,7 +892,9 @@ int sysfs_rename(struct sysfs_dirent *sd, sd->s_name = new_name; } - /* Move to the appropriate place in the appropriate directories rbtree. */ + /* + * Move to the appropriate place in the appropriate directories rbtree. + */ sysfs_unlink_sibling(sd); sysfs_get(new_parent_sd); sysfs_put(sd->s_parent); @@ -988,20 +986,21 @@ static struct sysfs_dirent *sysfs_dir_next_pos(const void *ns, struct sysfs_dirent *parent_sd, ino_t ino, struct sysfs_dirent *pos) { pos = sysfs_dir_pos(ns, parent_sd, ino, pos); - if (pos) do { - struct rb_node *node = rb_next(&pos->s_rb); - if (!node) - pos = NULL; - else - pos = to_sysfs_dirent(node); - } while (pos && pos->s_ns != ns); + if (pos) + do { + struct rb_node *node = rb_next(&pos->s_rb); + if (!node) + pos = NULL; + else + pos = to_sysfs_dirent(node); + } while (pos && pos->s_ns != ns); return pos; } static int sysfs_readdir(struct file *file, struct dir_context *ctx) { struct dentry *dentry = file->f_path.dentry; - struct sysfs_dirent * parent_sd = dentry->d_fsdata; + struct sysfs_dirent *parent_sd = dentry->d_fsdata; struct sysfs_dirent *pos = file->private_data; enum kobj_ns_type type; const void *ns; diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index d2bb7ed8fa74..15ef5eb13663 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -20,7 +20,7 @@ #include <linux/list.h> #include <linux/mutex.h> #include <linux/limits.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> #include "sysfs.h" @@ -45,8 +45,8 @@ struct sysfs_open_dirent { struct sysfs_buffer { size_t count; loff_t pos; - char * page; - const struct sysfs_ops * ops; + char *page; + const struct sysfs_ops *ops; struct mutex mutex; int needs_read_fill; int event; @@ -59,16 +59,16 @@ struct sysfs_buffer { * @buffer: data buffer for file. * * Allocate @buffer->page, if it hasn't been already, then call the - * kobject's show() method to fill the buffer with this attribute's - * data. + * kobject's show() method to fill the buffer with this attribute's + * data. * This is called only once, on the file's first read unless an error * is returned. */ -static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer) +static int fill_read_buffer(struct dentry *dentry, struct sysfs_buffer *buffer) { struct sysfs_dirent *attr_sd = dentry->d_fsdata; struct kobject *kobj = attr_sd->s_parent->s_dir.kobj; - const struct sysfs_ops * ops = buffer->ops; + const struct sysfs_ops *ops = buffer->ops; int ret = 0; ssize_t count; @@ -106,7 +106,7 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer } /** - * sysfs_read_file - read an attribute. + * sysfs_read_file - read an attribute. * @file: file pointer. * @buf: buffer to fill. * @count: number of bytes to read. @@ -127,12 +127,12 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer static ssize_t sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos) { - struct sysfs_buffer * buffer = file->private_data; + struct sysfs_buffer *buffer = file->private_data; ssize_t retval = 0; mutex_lock(&buffer->mutex); if (buffer->needs_read_fill || *ppos == 0) { - retval = fill_read_buffer(file->f_path.dentry,buffer); + retval = fill_read_buffer(file->f_path.dentry, buffer); if (retval) goto out; } @@ -154,9 +154,8 @@ out: * Allocate @buffer->page if it hasn't been already, then * copy the user-supplied buffer into it. */ - -static int -fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t count) +static int fill_write_buffer(struct sysfs_buffer *buffer, + const char __user *buf, size_t count) { int error; @@ -167,7 +166,7 @@ fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t if (count >= PAGE_SIZE) count = PAGE_SIZE - 1; - error = copy_from_user(buffer->page,buf,count); + error = copy_from_user(buffer->page, buf, count); buffer->needs_read_fill = 1; /* if buf is assumed to contain a string, terminate it by \0, so e.g. sscanf() can scan the string easily */ @@ -183,16 +182,15 @@ fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t * @count: number of bytes * * Get the correct pointers for the kobject and the attribute we're - * dealing with, then call the store() method for the attribute, + * dealing with, then call the store() method for the attribute, * passing the buffer that we acquired in fill_write_buffer(). */ - -static int -flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t count) +static int flush_write_buffer(struct dentry *dentry, + struct sysfs_buffer *buffer, size_t count) { struct sysfs_dirent *attr_sd = dentry->d_fsdata; struct kobject *kobj = attr_sd->s_parent->s_dir.kobj; - const struct sysfs_ops * ops = buffer->ops; + const struct sysfs_ops *ops = buffer->ops; int rc; /* need attr_sd for attr and ops, its parent for kobj */ @@ -219,15 +217,14 @@ flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t * then push it to the kobject in flush_write_buffer(). * There is no easy way for us to know if userspace is only doing a partial * write, so we don't support them. We expect the entire buffer to come - * on the first write. + * on the first write. * Hint: if you're writing a value, first read the file, modify only the - * the value you're changing, then write entire buffer back. + * the value you're changing, then write entire buffer back. */ - -static ssize_t -sysfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t *ppos) +static ssize_t sysfs_write_file(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) { - struct sysfs_buffer * buffer = file->private_data; + struct sysfs_buffer *buffer = file->private_data; ssize_t len; mutex_lock(&buffer->mutex); @@ -339,13 +336,14 @@ static int sysfs_open_file(struct inode *inode, struct file *file) if (kobj->ktype && kobj->ktype->sysfs_ops) ops = kobj->ktype->sysfs_ops; else { - WARN(1, KERN_ERR "missing sysfs attribute operations for " - "kobject: %s\n", kobject_name(kobj)); + WARN(1, KERN_ERR + "missing sysfs attribute operations for kobject: %s\n", + kobject_name(kobj)); goto err_out; } /* File needs write support. - * The inode's perms must say it's ok, + * The inode's perms must say it's ok, * and we must have a store method. */ if (file->f_mode & FMODE_WRITE) { @@ -420,7 +418,7 @@ static int sysfs_release(struct inode *inode, struct file *filp) */ static unsigned int sysfs_poll(struct file *filp, poll_table *wait) { - struct sysfs_buffer * buffer = filp->private_data; + struct sysfs_buffer *buffer = filp->private_data; struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata; struct sysfs_open_dirent *od = attr_sd->s_attr.open; @@ -518,8 +516,9 @@ static int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr, ns = ops->namespace(kobj, attr); out: if (err) { - WARN(1, KERN_ERR "missing sysfs namespace attribute operation for " - "kobject: %s\n", kobject_name(kobj)); + WARN(1, KERN_ERR + "missing sysfs namespace attribute operation for kobject: %s\n", + kobject_name(kobj)); } *pns = ns; return err; @@ -566,17 +565,17 @@ int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr, /** * sysfs_create_file - create an attribute file for an object. - * @kobj: object we're creating for. + * @kobj: object we're creating for. * @attr: attribute descriptor. */ - -int sysfs_create_file(struct kobject * kobj, const struct attribute * attr) +int sysfs_create_file(struct kobject *kobj, const struct attribute *attr) { BUG_ON(!kobj || !kobj->sd || !attr); return sysfs_add_file(kobj->sd, attr, SYSFS_KOBJ_ATTR); } +EXPORT_SYMBOL_GPL(sysfs_create_file); int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr) { @@ -590,6 +589,7 @@ int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr) sysfs_remove_file(kobj, ptr[i]); return err; } +EXPORT_SYMBOL_GPL(sysfs_create_files); /** * sysfs_add_file_to_group - add an attribute file to a pre-existing group. @@ -654,7 +654,6 @@ int sysfs_chmod_file(struct kobject *kobj, const struct attribute *attr, } EXPORT_SYMBOL_GPL(sysfs_chmod_file); - /** * sysfs_remove_file - remove an object attribute. * @kobj: object we're acting for. @@ -662,8 +661,7 @@ EXPORT_SYMBOL_GPL(sysfs_chmod_file); * * Hash the attribute name and kill the victim. */ - -void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr) +void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr) { const void *ns; @@ -672,13 +670,15 @@ void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr) sysfs_hash_and_remove(kobj->sd, ns, attr->name); } +EXPORT_SYMBOL_GPL(sysfs_remove_file); -void sysfs_remove_files(struct kobject * kobj, const struct attribute **ptr) +void sysfs_remove_files(struct kobject *kobj, const struct attribute **ptr) { int i; for (i = 0; ptr[i]; i++) sysfs_remove_file(kobj, ptr[i]); } +EXPORT_SYMBOL_GPL(sysfs_remove_files); /** * sysfs_remove_file_from_group - remove an attribute file from a group. @@ -793,9 +793,3 @@ int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *), return 0; } EXPORT_SYMBOL_GPL(sysfs_schedule_callback); - - -EXPORT_SYMBOL_GPL(sysfs_create_file); -EXPORT_SYMBOL_GPL(sysfs_remove_file); -EXPORT_SYMBOL_GPL(sysfs_remove_files); -EXPORT_SYMBOL_GPL(sysfs_create_files); diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c index 09a1a25cd145..5f92cd2f61c1 100644 --- a/fs/sysfs/group.c +++ b/fs/sysfs/group.c @@ -3,8 +3,10 @@ * * Copyright (c) 2003 Patrick Mochel * Copyright (c) 2003 Open Source Development Lab + * Copyright (c) 2013 Greg Kroah-Hartman + * Copyright (c) 2013 The Linux Foundation * - * This file is released undert the GPL v2. + * This file is released undert the GPL v2. * */ @@ -19,8 +21,8 @@ static void remove_files(struct sysfs_dirent *dir_sd, struct kobject *kobj, const struct attribute_group *grp) { - struct attribute *const* attr; - struct bin_attribute *const* bin_attr; + struct attribute *const *attr; + struct bin_attribute *const *bin_attr; if (grp->attrs) for (attr = grp->attrs; *attr; attr++) @@ -33,8 +35,8 @@ static void remove_files(struct sysfs_dirent *dir_sd, struct kobject *kobj, static int create_files(struct sysfs_dirent *dir_sd, struct kobject *kobj, const struct attribute_group *grp, int update) { - struct attribute *const* attr; - struct bin_attribute *const* bin_attr; + struct attribute *const *attr; + struct bin_attribute *const *bin_attr; int error = 0, i; if (grp->attrs) { @@ -129,6 +131,41 @@ int sysfs_create_group(struct kobject *kobj, { return internal_create_group(kobj, 0, grp); } +EXPORT_SYMBOL_GPL(sysfs_create_group); + +/** + * sysfs_create_groups - given a directory kobject, create a bunch of attribute groups + * @kobj: The kobject to create the group on + * @groups: The attribute groups to create, NULL terminated + * + * This function creates a bunch of attribute groups. If an error occurs when + * creating a group, all previously created groups will be removed, unwinding + * everything back to the original state when this function was called. + * It will explicitly warn and error if any of the attribute files being + * created already exist. + * + * Returns 0 on success or error code from sysfs_create_group on error. + */ +int sysfs_create_groups(struct kobject *kobj, + const struct attribute_group **groups) +{ + int error = 0; + int i; + + if (!groups) + return 0; + + for (i = 0; groups[i]; i++) { + error = sysfs_create_group(kobj, groups[i]); + if (error) { + while (--i >= 0) + sysfs_remove_group(kobj, groups[i]); + break; + } + } + return error; +} +EXPORT_SYMBOL_GPL(sysfs_create_groups); /** * sysfs_update_group - given a directory kobject, update an attribute group @@ -152,11 +189,18 @@ int sysfs_update_group(struct kobject *kobj, { return internal_create_group(kobj, 1, grp); } +EXPORT_SYMBOL_GPL(sysfs_update_group); - - -void sysfs_remove_group(struct kobject * kobj, - const struct attribute_group * grp) +/** + * sysfs_remove_group: remove a group from a kobject + * @kobj: kobject to remove the group from + * @grp: group to remove + * + * This function removes a group of attributes from a kobject. The attributes + * previously have to have been created for this group, otherwise it will fail. + */ +void sysfs_remove_group(struct kobject *kobj, + const struct attribute_group *grp) { struct sysfs_dirent *dir_sd = kobj->sd; struct sysfs_dirent *sd; @@ -164,8 +208,9 @@ void sysfs_remove_group(struct kobject * kobj, if (grp->name) { sd = sysfs_get_dirent(dir_sd, NULL, grp->name); if (!sd) { - WARN(!sd, KERN_WARNING "sysfs group %p not found for " - "kobject '%s'\n", grp, kobject_name(kobj)); + WARN(!sd, KERN_WARNING + "sysfs group %p not found for kobject '%s'\n", + grp, kobject_name(kobj)); return; } } else @@ -177,6 +222,27 @@ void sysfs_remove_group(struct kobject * kobj, sysfs_put(sd); } +EXPORT_SYMBOL_GPL(sysfs_remove_group); + +/** + * sysfs_remove_groups - remove a list of groups + * + * @kobj: The kobject for the groups to be removed from + * @groups: NULL terminated list of groups to be removed + * + * If groups is not NULL, remove the specified groups from the kobject. + */ +void sysfs_remove_groups(struct kobject *kobj, + const struct attribute_group **groups) +{ + int i; + + if (!groups) + return; + for (i = 0; groups[i]; i++) + sysfs_remove_group(kobj, groups[i]); +} +EXPORT_SYMBOL_GPL(sysfs_remove_groups); /** * sysfs_merge_group - merge files into a pre-existing attribute group. @@ -273,7 +339,3 @@ void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name, } } EXPORT_SYMBOL_GPL(sysfs_remove_link_from_group); - -EXPORT_SYMBOL_GPL(sysfs_create_group); -EXPORT_SYMBOL_GPL(sysfs_update_group); -EXPORT_SYMBOL_GPL(sysfs_remove_group); diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 3e2837a633ed..963f910c8034 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -10,7 +10,7 @@ * Please see Documentation/filesystems/sysfs.txt for more information. */ -#undef DEBUG +#undef DEBUG #include <linux/pagemap.h> #include <linux/namei.h> @@ -36,7 +36,7 @@ static struct backing_dev_info sysfs_backing_dev_info = { .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK, }; -static const struct inode_operations sysfs_inode_operations ={ +static const struct inode_operations sysfs_inode_operations = { .permission = sysfs_permission, .setattr = sysfs_setattr, .getattr = sysfs_getattr, @@ -67,7 +67,7 @@ static struct sysfs_inode_attrs *sysfs_init_inode_attrs(struct sysfs_dirent *sd) return attrs; } -int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr * iattr) +int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr) { struct sysfs_inode_attrs *sd_attrs; struct iattr *iattrs; @@ -128,7 +128,8 @@ out: return error; } -static int sysfs_sd_setsecdata(struct sysfs_dirent *sd, void **secdata, u32 *secdata_len) +static int sysfs_sd_setsecdata(struct sysfs_dirent *sd, void **secdata, + u32 *secdata_len) { struct sysfs_inode_attrs *iattrs; void *old_secdata; @@ -186,13 +187,13 @@ out: return error; } -static inline void set_default_inode_attr(struct inode * inode, umode_t mode) +static inline void set_default_inode_attr(struct inode *inode, umode_t mode) { inode->i_mode = mode; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; } -static inline void set_inode_attr(struct inode * inode, struct iattr * iattr) +static inline void set_inode_attr(struct inode *inode, struct iattr *iattr) { inode->i_uid = iattr->ia_uid; inode->i_gid = iattr->ia_gid; @@ -220,7 +221,8 @@ static void sysfs_refresh_inode(struct sysfs_dirent *sd, struct inode *inode) set_nlink(inode, sd->s_dir.subdirs + 2); } -int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) +int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, + struct kstat *stat) { struct sysfs_dirent *sd = dentry->d_fsdata; struct inode *inode = dentry->d_inode; @@ -285,7 +287,7 @@ static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode) * RETURNS: * Pointer to allocated inode on success, NULL on failure. */ -struct inode * sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd) +struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd) { struct inode *inode; @@ -312,7 +314,8 @@ void sysfs_evict_inode(struct inode *inode) sysfs_put(sd); } -int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, const char *name) +int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, + const char *name) { struct sysfs_addrm_cxt acxt; struct sysfs_dirent *sd; diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c index afd83273e6ce..834ec2cdb7a3 100644 --- a/fs/sysfs/mount.c +++ b/fs/sysfs/mount.c @@ -64,7 +64,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent) /* instantiate and link root dentry */ root = d_make_root(inode); if (!root) { - pr_debug("%s: could not get root dentry!\n",__func__); + pr_debug("%s: could not get root dentry!\n", __func__); return -ENOMEM; } root->d_fsdata = &sysfs_root; @@ -112,8 +112,15 @@ static struct dentry *sysfs_mount(struct file_system_type *fs_type, struct super_block *sb; int error; - if (!(flags & MS_KERNMOUNT) && !current_user_ns()->may_mount_sysfs) - return ERR_PTR(-EPERM); + if (!(flags & MS_KERNMOUNT)) { + if (!capable(CAP_SYS_ADMIN) && !fs_fully_visible(fs_type)) + return ERR_PTR(-EPERM); + + for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++) { + if (!kobj_ns_current_may_mount(type)) + return ERR_PTR(-EPERM); + } + } info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c index 8c940df97a52..2dd4507d9edd 100644 --- a/fs/sysfs/symlink.c +++ b/fs/sysfs/symlink.c @@ -125,6 +125,7 @@ int sysfs_create_link(struct kobject *kobj, struct kobject *target, { return sysfs_do_create_link(kobj, target, name, 1); } +EXPORT_SYMBOL_GPL(sysfs_create_link); /** * sysfs_create_link_nowarn - create symlink between two objects. @@ -166,8 +167,7 @@ void sysfs_delete_link(struct kobject *kobj, struct kobject *targ, * @kobj: object we're acting for. * @name: name of the symlink to remove. */ - -void sysfs_remove_link(struct kobject * kobj, const char * name) +void sysfs_remove_link(struct kobject *kobj, const char *name) { struct sysfs_dirent *parent_sd = NULL; @@ -178,6 +178,7 @@ void sysfs_remove_link(struct kobject * kobj, const char * name) sysfs_hash_and_remove(parent_sd, NULL, name); } +EXPORT_SYMBOL_GPL(sysfs_remove_link); /** * sysfs_rename_link - rename symlink in object's directory. @@ -223,6 +224,7 @@ out: sysfs_put(sd); return result; } +EXPORT_SYMBOL_GPL(sysfs_rename_link); static int sysfs_get_target_path(struct sysfs_dirent *parent_sd, struct sysfs_dirent *target_sd, char *path) @@ -276,7 +278,7 @@ static int sysfs_get_target_path(struct sysfs_dirent *parent_sd, return 0; } -static int sysfs_getlink(struct dentry *dentry, char * path) +static int sysfs_getlink(struct dentry *dentry, char *path) { struct sysfs_dirent *sd = dentry->d_fsdata; struct sysfs_dirent *parent_sd = sd->s_parent; @@ -295,7 +297,7 @@ static void *sysfs_follow_link(struct dentry *dentry, struct nameidata *nd) int error = -ENOMEM; unsigned long page = get_zeroed_page(GFP_KERNEL); if (page) { - error = sysfs_getlink(dentry, (char *) page); + error = sysfs_getlink(dentry, (char *) page); if (error < 0) free_page((unsigned long)page); } @@ -303,7 +305,8 @@ static void *sysfs_follow_link(struct dentry *dentry, struct nameidata *nd) return NULL; } -static void sysfs_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie) +static void sysfs_put_link(struct dentry *dentry, struct nameidata *nd, + void *cookie) { char *page = nd_get_link(nd); if (!IS_ERR(page)) @@ -319,8 +322,3 @@ const struct inode_operations sysfs_symlink_inode_operations = { .getattr = sysfs_getattr, .permission = sysfs_permission, }; - - -EXPORT_SYMBOL_GPL(sysfs_create_link); -EXPORT_SYMBOL_GPL(sysfs_remove_link); -EXPORT_SYMBOL_GPL(sysfs_rename_link); diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index d1e4043eb0c3..b6deca3e301d 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -78,7 +78,7 @@ struct sysfs_dirent { }; unsigned short s_flags; - umode_t s_mode; + umode_t s_mode; unsigned int s_ino; struct sysfs_inode_attrs *s_iattr; }; @@ -123,9 +123,9 @@ do { \ key = &attr->skey; \ \ lockdep_init_map(&sd->dep_map, "s_active", key, 0); \ -} while(0) +} while (0) #else -#define sysfs_dirent_init_lockdep(sd) do {} while(0) +#define sysfs_dirent_init_lockdep(sd) do {} while (0) #endif /* @@ -186,8 +186,8 @@ int sysfs_create_subdir(struct kobject *kobj, const char *name, struct sysfs_dirent **p_sd); void sysfs_remove_subdir(struct sysfs_dirent *sd); -int sysfs_rename(struct sysfs_dirent *sd, - struct sysfs_dirent *new_parent_sd, const void *ns, const char *new_name); +int sysfs_rename(struct sysfs_dirent *sd, struct sysfs_dirent *new_parent_sd, + const void *ns, const char *new_name); static inline struct sysfs_dirent *__sysfs_get(struct sysfs_dirent *sd) { @@ -214,10 +214,12 @@ void sysfs_evict_inode(struct inode *inode); int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr); int sysfs_permission(struct inode *inode, int mask); int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); -int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); +int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, + struct kstat *stat); int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value, - size_t size, int flags); -int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, const char *name); + size_t size, int flags); +int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, + const char *name); int sysfs_inode_init(void); /* diff --git a/fs/udf/super.c b/fs/udf/super.c index 9ac4057a86c9..839a2bad7f45 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -630,6 +630,12 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options) struct udf_sb_info *sbi = UDF_SB(sb); int error = 0; + if (sbi->s_lvid_bh) { + int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); + if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY)) + return -EACCES; + } + uopt.flags = sbi->s_flags; uopt.uid = sbi->s_uid; uopt.gid = sbi->s_gid; @@ -649,12 +655,6 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options) sbi->s_dmode = uopt.dmode; write_unlock(&sbi->s_cred_lock); - if (sbi->s_lvid_bh) { - int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); - if (write_rev > UDF_MAX_WRITE_VERSION) - *flags |= MS_RDONLY; - } - if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) goto out_unlock; @@ -843,27 +843,38 @@ static int udf_find_fileset(struct super_block *sb, return 1; } +/* + * Load primary Volume Descriptor Sequence + * + * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence + * should be tried. + */ static int udf_load_pvoldesc(struct super_block *sb, sector_t block) { struct primaryVolDesc *pvoldesc; struct ustr *instr, *outstr; struct buffer_head *bh; uint16_t ident; - int ret = 1; + int ret = -ENOMEM; instr = kmalloc(sizeof(struct ustr), GFP_NOFS); if (!instr) - return 1; + return -ENOMEM; outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); if (!outstr) goto out1; bh = udf_read_tagged(sb, block, block, &ident); - if (!bh) + if (!bh) { + ret = -EAGAIN; goto out2; + } - BUG_ON(ident != TAG_IDENT_PVD); + if (ident != TAG_IDENT_PVD) { + ret = -EIO; + goto out_bh; + } pvoldesc = (struct primaryVolDesc *)bh->b_data; @@ -889,8 +900,9 @@ static int udf_load_pvoldesc(struct super_block *sb, sector_t block) if (udf_CS0toUTF8(outstr, instr)) udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); - brelse(bh); ret = 0; +out_bh: + brelse(bh); out2: kfree(outstr); out1: @@ -947,7 +959,7 @@ static int udf_load_metadata_files(struct super_block *sb, int partition) if (mdata->s_mirror_fe == NULL) { udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); - goto error_exit; + return -EIO; } } @@ -964,23 +976,18 @@ static int udf_load_metadata_files(struct super_block *sb, int partition) addr.logicalBlockNum, addr.partitionReferenceNum); mdata->s_bitmap_fe = udf_iget(sb, &addr); - if (mdata->s_bitmap_fe == NULL) { if (sb->s_flags & MS_RDONLY) udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); else { udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); - goto error_exit; + return -EIO; } } } udf_debug("udf_load_metadata_files Ok\n"); - return 0; - -error_exit: - return 1; } static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, @@ -1069,7 +1076,7 @@ static int udf_fill_partdesc_info(struct super_block *sb, if (!map->s_uspace.s_table) { udf_debug("cannot load unallocSpaceTable (part %d)\n", p_index); - return 1; + return -EIO; } map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; udf_debug("unallocSpaceTable (part %d) @ %ld\n", @@ -1079,7 +1086,7 @@ static int udf_fill_partdesc_info(struct super_block *sb, if (phd->unallocSpaceBitmap.extLength) { struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); if (!bitmap) - return 1; + return -ENOMEM; map->s_uspace.s_bitmap = bitmap; bitmap->s_extPosition = le32_to_cpu( phd->unallocSpaceBitmap.extPosition); @@ -1102,7 +1109,7 @@ static int udf_fill_partdesc_info(struct super_block *sb, if (!map->s_fspace.s_table) { udf_debug("cannot load freedSpaceTable (part %d)\n", p_index); - return 1; + return -EIO; } map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; @@ -1113,7 +1120,7 @@ static int udf_fill_partdesc_info(struct super_block *sb, if (phd->freedSpaceBitmap.extLength) { struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); if (!bitmap) - return 1; + return -ENOMEM; map->s_fspace.s_bitmap = bitmap; bitmap->s_extPosition = le32_to_cpu( phd->freedSpaceBitmap.extPosition); @@ -1165,7 +1172,7 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) udf_find_vat_block(sb, p_index, type1_index, blocks - 1); } if (!sbi->s_vat_inode) - return 1; + return -EIO; if (map->s_partition_type == UDF_VIRTUAL_MAP15) { map->s_type_specific.s_virtual.s_start_offset = 0; @@ -1177,7 +1184,7 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) pos = udf_block_map(sbi->s_vat_inode, 0); bh = sb_bread(sb, pos); if (!bh) - return 1; + return -EIO; vat20 = (struct virtualAllocationTable20 *)bh->b_data; } else { vat20 = (struct virtualAllocationTable20 *) @@ -1195,6 +1202,12 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) return 0; } +/* + * Load partition descriptor block + * + * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor + * sequence. + */ static int udf_load_partdesc(struct super_block *sb, sector_t block) { struct buffer_head *bh; @@ -1204,13 +1217,15 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block) int i, type1_idx; uint16_t partitionNumber; uint16_t ident; - int ret = 0; + int ret; bh = udf_read_tagged(sb, block, block, &ident); if (!bh) - return 1; - if (ident != TAG_IDENT_PD) + return -EAGAIN; + if (ident != TAG_IDENT_PD) { + ret = 0; goto out_bh; + } p = (struct partitionDesc *)bh->b_data; partitionNumber = le16_to_cpu(p->partitionNumber); @@ -1229,10 +1244,13 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block) if (i >= sbi->s_partitions) { udf_debug("Partition (%d) not found in partition map\n", partitionNumber); + ret = 0; goto out_bh; } ret = udf_fill_partdesc_info(sb, p, i); + if (ret < 0) + goto out_bh; /* * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and @@ -1249,32 +1267,37 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block) break; } - if (i >= sbi->s_partitions) + if (i >= sbi->s_partitions) { + ret = 0; goto out_bh; + } ret = udf_fill_partdesc_info(sb, p, i); - if (ret) + if (ret < 0) goto out_bh; if (map->s_partition_type == UDF_METADATA_MAP25) { ret = udf_load_metadata_files(sb, i); - if (ret) { + if (ret < 0) { udf_err(sb, "error loading MetaData partition map %d\n", i); goto out_bh; } } else { - ret = udf_load_vat(sb, i, type1_idx); - if (ret) - goto out_bh; /* - * Mark filesystem read-only if we have a partition with - * virtual map since we don't handle writing to it (we - * overwrite blocks instead of relocating them). + * If we have a partition with virtual map, we don't handle + * writing to it (we overwrite blocks instead of relocating + * them). */ - sb->s_flags |= MS_RDONLY; - pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); + if (!(sb->s_flags & MS_RDONLY)) { + ret = -EACCES; + goto out_bh; + } + ret = udf_load_vat(sb, i, type1_idx); + if (ret < 0) + goto out_bh; } + ret = 0; out_bh: /* In case loading failed, we handle cleanup in udf_fill_super */ brelse(bh); @@ -1340,11 +1363,11 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block, uint16_t ident; struct buffer_head *bh; unsigned int table_len; - int ret = 0; + int ret; bh = udf_read_tagged(sb, block, block, &ident); if (!bh) - return 1; + return -EAGAIN; BUG_ON(ident != TAG_IDENT_LVD); lvd = (struct logicalVolDesc *)bh->b_data; table_len = le32_to_cpu(lvd->mapTableLength); @@ -1352,7 +1375,7 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block, udf_err(sb, "error loading logical volume descriptor: " "Partition table too long (%u > %lu)\n", table_len, sb->s_blocksize - sizeof(*lvd)); - ret = 1; + ret = -EIO; goto out_bh; } @@ -1396,11 +1419,10 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block, } else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE))) { - if (udf_load_sparable_map(sb, map, - (struct sparablePartitionMap *)gpm) < 0) { - ret = 1; + ret = udf_load_sparable_map(sb, map, + (struct sparablePartitionMap *)gpm); + if (ret < 0) goto out_bh; - } } else if (!strncmp(upm2->partIdent.ident, UDF_ID_METADATA, strlen(UDF_ID_METADATA))) { @@ -1465,7 +1487,7 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block, } if (lvd->integritySeqExt.extLength) udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); - + ret = 0; out_bh: brelse(bh); return ret; @@ -1503,22 +1525,18 @@ static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ } /* - * udf_process_sequence - * - * PURPOSE - * Process a main/reserve volume descriptor sequence. - * - * PRE-CONDITIONS - * sb Pointer to _locked_ superblock. - * block First block of first extent of the sequence. - * lastblock Lastblock of first extent of the sequence. + * Process a main/reserve volume descriptor sequence. + * @block First block of first extent of the sequence. + * @lastblock Lastblock of first extent of the sequence. + * @fileset There we store extent containing root fileset * - * HISTORY - * July 1, 1997 - Andrew E. Mileski - * Written, tested, and released. + * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor + * sequence */ -static noinline int udf_process_sequence(struct super_block *sb, long block, - long lastblock, struct kernel_lb_addr *fileset) +static noinline int udf_process_sequence( + struct super_block *sb, + sector_t block, sector_t lastblock, + struct kernel_lb_addr *fileset) { struct buffer_head *bh = NULL; struct udf_vds_record vds[VDS_POS_LENGTH]; @@ -1529,6 +1547,7 @@ static noinline int udf_process_sequence(struct super_block *sb, long block, uint32_t vdsn; uint16_t ident; long next_s = 0, next_e = 0; + int ret; memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); @@ -1543,7 +1562,7 @@ static noinline int udf_process_sequence(struct super_block *sb, long block, udf_err(sb, "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", (unsigned long long)block); - return 1; + return -EAGAIN; } /* Process each descriptor (ISO 13346 3/8.3-8.4) */ @@ -1616,14 +1635,19 @@ static noinline int udf_process_sequence(struct super_block *sb, long block, */ if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { udf_err(sb, "Primary Volume Descriptor not found!\n"); - return 1; + return -EAGAIN; + } + ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block); + if (ret < 0) + return ret; + + if (vds[VDS_POS_LOGICAL_VOL_DESC].block) { + ret = udf_load_logicalvol(sb, + vds[VDS_POS_LOGICAL_VOL_DESC].block, + fileset); + if (ret < 0) + return ret; } - if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) - return 1; - - if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, - vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) - return 1; if (vds[VDS_POS_PARTITION_DESC].block) { /* @@ -1632,19 +1656,27 @@ static noinline int udf_process_sequence(struct super_block *sb, long block, */ for (block = vds[VDS_POS_PARTITION_DESC].block; block < vds[VDS_POS_TERMINATING_DESC].block; - block++) - if (udf_load_partdesc(sb, block)) - return 1; + block++) { + ret = udf_load_partdesc(sb, block); + if (ret < 0) + return ret; + } } return 0; } +/* + * Load Volume Descriptor Sequence described by anchor in bh + * + * Returns <0 on error, 0 on success + */ static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, struct kernel_lb_addr *fileset) { struct anchorVolDescPtr *anchor; - long main_s, main_e, reserve_s, reserve_e; + sector_t main_s, main_e, reserve_s, reserve_e; + int ret; anchor = (struct anchorVolDescPtr *)bh->b_data; @@ -1662,18 +1694,26 @@ static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, /* Process the main & reserve sequences */ /* responsible for finding the PartitionDesc(s) */ - if (!udf_process_sequence(sb, main_s, main_e, fileset)) - return 1; - udf_sb_free_partitions(sb); - if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset)) - return 1; + ret = udf_process_sequence(sb, main_s, main_e, fileset); + if (ret != -EAGAIN) + return ret; udf_sb_free_partitions(sb); - return 0; + ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset); + if (ret < 0) { + udf_sb_free_partitions(sb); + /* No sequence was OK, return -EIO */ + if (ret == -EAGAIN) + ret = -EIO; + } + return ret; } /* * Check whether there is an anchor block in the given block and * load Volume Descriptor Sequence if so. + * + * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor + * block */ static int udf_check_anchor_block(struct super_block *sb, sector_t block, struct kernel_lb_addr *fileset) @@ -1685,33 +1725,40 @@ static int udf_check_anchor_block(struct super_block *sb, sector_t block, if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && udf_fixed_to_variable(block) >= sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) - return 0; + return -EAGAIN; bh = udf_read_tagged(sb, block, block, &ident); if (!bh) - return 0; + return -EAGAIN; if (ident != TAG_IDENT_AVDP) { brelse(bh); - return 0; + return -EAGAIN; } ret = udf_load_sequence(sb, bh, fileset); brelse(bh); return ret; } -/* Search for an anchor volume descriptor pointer */ -static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, - struct kernel_lb_addr *fileset) +/* + * Search for an anchor volume descriptor pointer. + * + * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set + * of anchors. + */ +static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock, + struct kernel_lb_addr *fileset) { sector_t last[6]; int i; struct udf_sb_info *sbi = UDF_SB(sb); int last_count = 0; + int ret; /* First try user provided anchor */ if (sbi->s_anchor) { - if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) - return lastblock; + ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset); + if (ret != -EAGAIN) + return ret; } /* * according to spec, anchor is in either: @@ -1720,39 +1767,46 @@ static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, * lastblock * however, if the disc isn't closed, it could be 512. */ - if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) - return lastblock; + ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset); + if (ret != -EAGAIN) + return ret; /* * The trouble is which block is the last one. Drives often misreport * this so we try various possibilities. */ - last[last_count++] = lastblock; - if (lastblock >= 1) - last[last_count++] = lastblock - 1; - last[last_count++] = lastblock + 1; - if (lastblock >= 2) - last[last_count++] = lastblock - 2; - if (lastblock >= 150) - last[last_count++] = lastblock - 150; - if (lastblock >= 152) - last[last_count++] = lastblock - 152; + last[last_count++] = *lastblock; + if (*lastblock >= 1) + last[last_count++] = *lastblock - 1; + last[last_count++] = *lastblock + 1; + if (*lastblock >= 2) + last[last_count++] = *lastblock - 2; + if (*lastblock >= 150) + last[last_count++] = *lastblock - 150; + if (*lastblock >= 152) + last[last_count++] = *lastblock - 152; for (i = 0; i < last_count; i++) { if (last[i] >= sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) continue; - if (udf_check_anchor_block(sb, last[i], fileset)) - return last[i]; + ret = udf_check_anchor_block(sb, last[i], fileset); + if (ret != -EAGAIN) { + if (!ret) + *lastblock = last[i]; + return ret; + } if (last[i] < 256) continue; - if (udf_check_anchor_block(sb, last[i] - 256, fileset)) - return last[i]; + ret = udf_check_anchor_block(sb, last[i] - 256, fileset); + if (ret != -EAGAIN) { + if (!ret) + *lastblock = last[i]; + return ret; + } } /* Finally try block 512 in case media is open */ - if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) - return last[0]; - return 0; + return udf_check_anchor_block(sb, sbi->s_session + 512, fileset); } /* @@ -1760,54 +1814,59 @@ static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, * area specified by it. The function expects sbi->s_lastblock to be the last * block on the media. * - * Return 1 if ok, 0 if not found. - * + * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor + * was not found. */ static int udf_find_anchor(struct super_block *sb, struct kernel_lb_addr *fileset) { - sector_t lastblock; struct udf_sb_info *sbi = UDF_SB(sb); + sector_t lastblock = sbi->s_last_block; + int ret; - lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); - if (lastblock) + ret = udf_scan_anchors(sb, &lastblock, fileset); + if (ret != -EAGAIN) goto out; /* No anchor found? Try VARCONV conversion of block numbers */ UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); + lastblock = udf_variable_to_fixed(sbi->s_last_block); /* Firstly, we try to not convert number of the last block */ - lastblock = udf_scan_anchors(sb, - udf_variable_to_fixed(sbi->s_last_block), - fileset); - if (lastblock) + ret = udf_scan_anchors(sb, &lastblock, fileset); + if (ret != -EAGAIN) goto out; + lastblock = sbi->s_last_block; /* Secondly, we try with converted number of the last block */ - lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); - if (!lastblock) { + ret = udf_scan_anchors(sb, &lastblock, fileset); + if (ret < 0) { /* VARCONV didn't help. Clear it. */ UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); - return 0; } out: - sbi->s_last_block = lastblock; - return 1; + if (ret == 0) + sbi->s_last_block = lastblock; + return ret; } /* * Check Volume Structure Descriptor, find Anchor block and load Volume - * Descriptor Sequence + * Descriptor Sequence. + * + * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor + * block was not found. */ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, int silent, struct kernel_lb_addr *fileset) { struct udf_sb_info *sbi = UDF_SB(sb); loff_t nsr_off; + int ret; if (!sb_set_blocksize(sb, uopt->blocksize)) { if (!silent) udf_warn(sb, "Bad block size\n"); - return 0; + return -EINVAL; } sbi->s_last_block = uopt->lastblock; if (!uopt->novrs) { @@ -1828,12 +1887,13 @@ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, /* Look for anchor block and load Volume Descriptor Sequence */ sbi->s_anchor = uopt->anchor; - if (!udf_find_anchor(sb, fileset)) { - if (!silent) + ret = udf_find_anchor(sb, fileset); + if (ret < 0) { + if (!silent && ret == -EAGAIN) udf_warn(sb, "No anchor found\n"); - return 0; + return ret; } - return 1; + return 0; } static void udf_open_lvid(struct super_block *sb) @@ -1939,7 +1999,7 @@ u64 lvid_get_unique_id(struct super_block *sb) static int udf_fill_super(struct super_block *sb, void *options, int silent) { - int ret; + int ret = -EINVAL; struct inode *inode = NULL; struct udf_options uopt; struct kernel_lb_addr rootdir, fileset; @@ -2011,7 +2071,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) } else { uopt.blocksize = bdev_logical_block_size(sb->s_bdev); ret = udf_load_vrs(sb, &uopt, silent, &fileset); - if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { + if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { if (!silent) pr_notice("Rescanning with blocksize %d\n", UDF_DEFAULT_BLOCKSIZE); @@ -2021,8 +2081,11 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) ret = udf_load_vrs(sb, &uopt, silent, &fileset); } } - if (!ret) { - udf_warn(sb, "No partition found (1)\n"); + if (ret < 0) { + if (ret == -EAGAIN) { + udf_warn(sb, "No partition found (1)\n"); + ret = -EINVAL; + } goto error_out; } @@ -2040,9 +2103,13 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) udf_err(sb, "minUDFReadRev=%x (max is %x)\n", le16_to_cpu(lvidiu->minUDFReadRev), UDF_MAX_READ_VERSION); + ret = -EINVAL; + goto error_out; + } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION && + !(sb->s_flags & MS_RDONLY)) { + ret = -EACCES; goto error_out; - } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) - sb->s_flags |= MS_RDONLY; + } sbi->s_udfrev = minUDFWriteRev; @@ -2054,17 +2121,20 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) if (!sbi->s_partitions) { udf_warn(sb, "No partition found (2)\n"); + ret = -EINVAL; goto error_out; } if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & - UDF_PART_FLAG_READ_ONLY) { - pr_notice("Partition marked readonly; forcing readonly mount\n"); - sb->s_flags |= MS_RDONLY; + UDF_PART_FLAG_READ_ONLY && + !(sb->s_flags & MS_RDONLY)) { + ret = -EACCES; + goto error_out; } if (udf_find_fileset(sb, &fileset, &rootdir)) { udf_warn(sb, "No fileset found\n"); + ret = -EINVAL; goto error_out; } @@ -2086,6 +2156,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) if (!inode) { udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", rootdir.logicalBlockNum, rootdir.partitionReferenceNum); + ret = -EIO; goto error_out; } @@ -2093,6 +2164,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) sb->s_root = d_make_root(inode); if (!sb->s_root) { udf_err(sb, "Couldn't allocate root dentry\n"); + ret = -ENOMEM; goto error_out; } sb->s_maxbytes = MAX_LFS_FILESIZE; @@ -2113,7 +2185,7 @@ error_out: kfree(sbi); sb->s_fs_info = NULL; - return -EINVAL; + return ret; } void _udf_err(struct super_block *sb, const char *function, diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 596ec71da00e..e11d654af786 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -86,14 +86,6 @@ xfs_destroy_ioend( bh->b_end_io(bh, !ioend->io_error); } - if (ioend->io_iocb) { - inode_dio_done(ioend->io_inode); - if (ioend->io_isasync) { - aio_complete(ioend->io_iocb, ioend->io_error ? - ioend->io_error : ioend->io_result, 0); - } - } - mempool_free(ioend, xfs_ioend_pool); } @@ -281,7 +273,6 @@ xfs_alloc_ioend( * all the I/O from calling the completion routine too early. */ atomic_set(&ioend->io_remaining, 1); - ioend->io_isasync = 0; ioend->io_isdirect = 0; ioend->io_error = 0; ioend->io_list = NULL; @@ -291,8 +282,6 @@ xfs_alloc_ioend( ioend->io_buffer_tail = NULL; ioend->io_offset = 0; ioend->io_size = 0; - ioend->io_iocb = NULL; - ioend->io_result = 0; ioend->io_append_trans = NULL; INIT_WORK(&ioend->io_work, xfs_end_io); @@ -1292,8 +1281,10 @@ __xfs_get_blocks( if (create || !ISUNWRITTEN(&imap)) xfs_map_buffer(inode, bh_result, &imap, offset); if (create && ISUNWRITTEN(&imap)) { - if (direct) + if (direct) { bh_result->b_private = inode; + set_buffer_defer_completion(bh_result); + } set_buffer_unwritten(bh_result); } } @@ -1390,9 +1381,7 @@ xfs_end_io_direct_write( struct kiocb *iocb, loff_t offset, ssize_t size, - void *private, - int ret, - bool is_async) + void *private) { struct xfs_ioend *ioend = iocb->private; @@ -1414,17 +1403,10 @@ xfs_end_io_direct_write( ioend->io_offset = offset; ioend->io_size = size; - ioend->io_iocb = iocb; - ioend->io_result = ret; if (private && size > 0) ioend->io_type = XFS_IO_UNWRITTEN; - if (is_async) { - ioend->io_isasync = 1; - xfs_finish_ioend(ioend); - } else { - xfs_finish_ioend_sync(ioend); - } + xfs_finish_ioend_sync(ioend); } STATIC ssize_t diff --git a/fs/xfs/xfs_aops.h b/fs/xfs/xfs_aops.h index c325abb8d61a..f94dd459dff9 100644 --- a/fs/xfs/xfs_aops.h +++ b/fs/xfs/xfs_aops.h @@ -45,7 +45,6 @@ typedef struct xfs_ioend { unsigned int io_type; /* delalloc / unwritten */ int io_error; /* I/O error code */ atomic_t io_remaining; /* hold count */ - unsigned int io_isasync : 1; /* needs aio_complete */ unsigned int io_isdirect : 1;/* direct I/O */ struct inode *io_inode; /* file being written to */ struct buffer_head *io_buffer_head;/* buffer linked list head */ @@ -54,8 +53,6 @@ typedef struct xfs_ioend { xfs_off_t io_offset; /* offset in the file */ struct work_struct io_work; /* xfsdatad work queue */ struct xfs_trans *io_append_trans;/* xact. for size update */ - struct kiocb *io_iocb; - int io_result; } xfs_ioend_t; extern const struct address_space_operations xfs_address_space_operations; |