diff options
Diffstat (limited to 'fs')
82 files changed, 1570 insertions, 719 deletions
diff --git a/fs/afs/write.c b/fs/afs/write.c index 15690bb1d3b5..789b3afb3423 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -140,6 +140,7 @@ int afs_write_begin(struct file *file, struct address_space *mapping, candidate->first = candidate->last = index; candidate->offset_first = from; candidate->to_last = to; + INIT_LIST_HEAD(&candidate->link); candidate->usage = 1; candidate->state = AFS_WBACK_PENDING; init_waitqueue_head(&candidate->waitq); @@ -239,15 +239,23 @@ static void __put_ioctx(struct kioctx *ctx) call_rcu(&ctx->rcu_head, ctx_rcu_free); } -#define get_ioctx(kioctx) do { \ - BUG_ON(atomic_read(&(kioctx)->users) <= 0); \ - atomic_inc(&(kioctx)->users); \ -} while (0) -#define put_ioctx(kioctx) do { \ - BUG_ON(atomic_read(&(kioctx)->users) <= 0); \ - if (unlikely(atomic_dec_and_test(&(kioctx)->users))) \ - __put_ioctx(kioctx); \ -} while (0) +static inline void get_ioctx(struct kioctx *kioctx) +{ + BUG_ON(atomic_read(&kioctx->users) <= 0); + atomic_inc(&kioctx->users); +} + +static inline int try_get_ioctx(struct kioctx *kioctx) +{ + return atomic_inc_not_zero(&kioctx->users); +} + +static inline void put_ioctx(struct kioctx *kioctx) +{ + BUG_ON(atomic_read(&kioctx->users) <= 0); + if (unlikely(atomic_dec_and_test(&kioctx->users))) + __put_ioctx(kioctx); +} /* ioctx_alloc * Allocates and initializes an ioctx. Returns an ERR_PTR if it failed. @@ -601,8 +609,13 @@ static struct kioctx *lookup_ioctx(unsigned long ctx_id) rcu_read_lock(); hlist_for_each_entry_rcu(ctx, n, &mm->ioctx_list, list) { - if (ctx->user_id == ctx_id && !ctx->dead) { - get_ioctx(ctx); + /* + * RCU protects us against accessing freed memory but + * we have to be careful not to get a reference when the + * reference count already dropped to 0 (ctx->dead test + * is unreliable because of races). + */ + if (ctx->user_id == ctx_id && !ctx->dead && try_get_ioctx(ctx)){ ret = ctx; break; } @@ -1629,6 +1642,23 @@ static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb, goto out_put_req; spin_lock_irq(&ctx->ctx_lock); + /* + * We could have raced with io_destroy() and are currently holding a + * reference to ctx which should be destroyed. We cannot submit IO + * since ctx gets freed as soon as io_submit() puts its reference. The + * check here is reliable: io_destroy() sets ctx->dead before waiting + * for outstanding IO and the barrier between these two is realized by + * unlock of mm->ioctx_lock and lock of ctx->ctx_lock. Analogously we + * increment ctx->reqs_active before checking for ctx->dead and the + * barrier is realized by unlock and lock of ctx->ctx_lock. Thus if we + * don't see ctx->dead set here, io_destroy() waits for our IO to + * finish. + */ + if (ctx->dead) { + spin_unlock_irq(&ctx->ctx_lock); + ret = -EINVAL; + goto out_put_req; + } aio_run_iocb(req); if (!list_empty(&ctx->run_list)) { /* drain the run list */ diff --git a/fs/block_dev.c b/fs/block_dev.c index 333a7bb4cb9c..889287019599 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -873,6 +873,11 @@ int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk) ret = add_symlink(bdev->bd_part->holder_dir, &disk_to_dev(disk)->kobj); if (ret) goto out_del; + /* + * bdev could be deleted beneath us which would implicitly destroy + * the holder directory. Hold on to it. + */ + kobject_get(bdev->bd_part->holder_dir); list_add(&holder->list, &bdev->bd_holder_disks); goto out_unlock; @@ -909,6 +914,7 @@ void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk) del_symlink(disk->slave_dir, &part_to_dev(bdev->bd_part)->kobj); del_symlink(bdev->bd_part->holder_dir, &disk_to_dev(disk)->kobj); + kobject_put(bdev->bd_part->holder_dir); list_del_init(&holder->list); kfree(holder); } @@ -922,14 +928,15 @@ EXPORT_SYMBOL_GPL(bd_unlink_disk_holder); * flush_disk - invalidates all buffer-cache entries on a disk * * @bdev: struct block device to be flushed + * @kill_dirty: flag to guide handling of dirty inodes * * Invalidates all buffer-cache entries on a disk. It should be called * when a disk has been changed -- either by a media change or online * resize. */ -static void flush_disk(struct block_device *bdev) +static void flush_disk(struct block_device *bdev, bool kill_dirty) { - if (__invalidate_device(bdev)) { + if (__invalidate_device(bdev, kill_dirty)) { char name[BDEVNAME_SIZE] = ""; if (bdev->bd_disk) @@ -966,7 +973,7 @@ void check_disk_size_change(struct gendisk *disk, struct block_device *bdev) "%s: detected capacity change from %lld to %lld\n", name, bdev_size, disk_size); i_size_write(bdev->bd_inode, disk_size); - flush_disk(bdev); + flush_disk(bdev, false); } } EXPORT_SYMBOL(check_disk_size_change); @@ -1019,7 +1026,7 @@ int check_disk_change(struct block_device *bdev) if (!(events & DISK_EVENT_MEDIA_CHANGE)) return 0; - flush_disk(bdev); + flush_disk(bdev, true); if (bdops->revalidate_disk) bdops->revalidate_disk(bdev->bd_disk); return 1; @@ -1215,12 +1222,6 @@ int blkdev_get(struct block_device *bdev, fmode_t mode, void *holder) res = __blkdev_get(bdev, mode, 0); - /* __blkdev_get() may alter read only status, check it afterwards */ - if (!res && (mode & FMODE_WRITE) && bdev_read_only(bdev)) { - __blkdev_put(bdev, mode, 0); - res = -EACCES; - } - if (whole) { /* finish claiming */ mutex_lock(&bdev->bd_mutex); @@ -1298,6 +1299,11 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode, if (err) return ERR_PTR(err); + if ((mode & FMODE_WRITE) && bdev_read_only(bdev)) { + blkdev_put(bdev, mode); + return ERR_PTR(-EACCES); + } + return bdev; } EXPORT_SYMBOL(blkdev_get_by_path); @@ -1601,7 +1607,7 @@ fail: } EXPORT_SYMBOL(lookup_bdev); -int __invalidate_device(struct block_device *bdev) +int __invalidate_device(struct block_device *bdev, bool kill_dirty) { struct super_block *sb = get_super(bdev); int res = 0; @@ -1614,7 +1620,7 @@ int __invalidate_device(struct block_device *bdev) * hold). */ shrink_dcache_sb(sb); - res = invalidate_inodes(sb); + res = invalidate_inodes(sb, kill_dirty); drop_super(sb); } invalidate_bdev(bdev); diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c index 15b5ca2a2606..9c949348510b 100644 --- a/fs/btrfs/acl.c +++ b/fs/btrfs/acl.c @@ -37,6 +37,9 @@ static struct posix_acl *btrfs_get_acl(struct inode *inode, int type) char *value = NULL; struct posix_acl *acl; + if (!IS_POSIXACL(inode)) + return NULL; + acl = get_cached_acl(inode, type); if (acl != ACL_NOT_CACHED) return acl; @@ -84,6 +87,9 @@ static int btrfs_xattr_acl_get(struct dentry *dentry, const char *name, struct posix_acl *acl; int ret = 0; + if (!IS_POSIXACL(dentry->d_inode)) + return -EOPNOTSUPP; + acl = btrfs_get_acl(dentry->d_inode, type); if (IS_ERR(acl)) diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index f745287fbf2e..4d2110eafe29 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -562,7 +562,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, u64 em_len; u64 em_start; struct extent_map *em; - int ret; + int ret = -ENOMEM; u32 *sums; tree = &BTRFS_I(inode)->io_tree; @@ -577,6 +577,9 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, compressed_len = em->block_len; cb = kmalloc(compressed_bio_size(root, compressed_len), GFP_NOFS); + if (!cb) + goto out; + atomic_set(&cb->pending_bios, 0); cb->errors = 0; cb->inode = inode; @@ -597,13 +600,18 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, nr_pages = (compressed_len + PAGE_CACHE_SIZE - 1) / PAGE_CACHE_SIZE; - cb->compressed_pages = kmalloc(sizeof(struct page *) * nr_pages, + cb->compressed_pages = kzalloc(sizeof(struct page *) * nr_pages, GFP_NOFS); + if (!cb->compressed_pages) + goto fail1; + bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; for (page_index = 0; page_index < nr_pages; page_index++) { cb->compressed_pages[page_index] = alloc_page(GFP_NOFS | __GFP_HIGHMEM); + if (!cb->compressed_pages[page_index]) + goto fail2; } cb->nr_pages = nr_pages; @@ -614,6 +622,8 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, cb->len = uncompressed_len; comp_bio = compressed_bio_alloc(bdev, cur_disk_byte, GFP_NOFS); + if (!comp_bio) + goto fail2; comp_bio->bi_private = cb; comp_bio->bi_end_io = end_compressed_bio_read; atomic_inc(&cb->pending_bios); @@ -681,6 +691,17 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, bio_put(comp_bio); return 0; + +fail2: + for (page_index = 0; page_index < nr_pages; page_index++) + free_page((unsigned long)cb->compressed_pages[page_index]); + + kfree(cb->compressed_pages); +fail1: + kfree(cb); +out: + free_extent_map(em); + return ret; } static struct list_head comp_idle_workspace[BTRFS_COMPRESS_TYPES]; @@ -900,7 +921,7 @@ int btrfs_decompress(int type, unsigned char *data_in, struct page *dest_page, return ret; } -void __exit btrfs_exit_compress(void) +void btrfs_exit_compress(void) { free_workspaces(); } diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 2c98b3af6052..6f820fa23df4 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1254,6 +1254,7 @@ struct btrfs_root { #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) +#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) @@ -2218,6 +2219,8 @@ int btrfs_error_unpin_extent_range(struct btrfs_root *root, u64 start, u64 end); int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr, u64 num_bytes); +int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, + struct btrfs_root *root, u64 type); /* ctree.c */ int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index b531c36455d8..e1aa8d607bc7 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -359,10 +359,14 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) tree = &BTRFS_I(page->mapping->host)->io_tree; - if (page->private == EXTENT_PAGE_PRIVATE) + if (page->private == EXTENT_PAGE_PRIVATE) { + WARN_ON(1); goto out; - if (!page->private) + } + if (!page->private) { + WARN_ON(1); goto out; + } len = page->private >> 2; WARN_ON(len == 0); @@ -1550,6 +1554,7 @@ static int transaction_kthread(void *arg) spin_unlock(&root->fs_info->new_trans_lock); trans = btrfs_join_transaction(root, 1); + BUG_ON(IS_ERR(trans)); if (transid == trans->transid) { ret = btrfs_commit_transaction(trans, root); BUG_ON(ret); @@ -2453,10 +2458,14 @@ int btrfs_commit_super(struct btrfs_root *root) up_write(&root->fs_info->cleanup_work_sem); trans = btrfs_join_transaction(root, 1); + if (IS_ERR(trans)) + return PTR_ERR(trans); ret = btrfs_commit_transaction(trans, root); BUG_ON(ret); /* run commit again to drop the original snapshot */ trans = btrfs_join_transaction(root, 1); + if (IS_ERR(trans)) + return PTR_ERR(trans); btrfs_commit_transaction(trans, root); ret = btrfs_write_and_wait_transaction(NULL, root); BUG_ON(ret); @@ -2554,6 +2563,8 @@ int close_ctree(struct btrfs_root *root) kfree(fs_info->chunk_root); kfree(fs_info->dev_root); kfree(fs_info->csum_root); + kfree(fs_info); + return 0; } diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c index 9786963b07e5..ff27d7a477b2 100644 --- a/fs/btrfs/export.c +++ b/fs/btrfs/export.c @@ -171,6 +171,8 @@ static struct dentry *btrfs_get_parent(struct dentry *child) int ret; path = btrfs_alloc_path(); + if (!path) + return ERR_PTR(-ENOMEM); if (dir->i_ino == BTRFS_FIRST_FREE_OBJECTID) { key.objectid = root->root_key.objectid; diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index b55269340cec..588ff9849873 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -320,11 +320,6 @@ static int caching_kthread(void *data) if (!path) return -ENOMEM; - exclude_super_stripes(extent_root, block_group); - spin_lock(&block_group->space_info->lock); - block_group->space_info->bytes_readonly += block_group->bytes_super; - spin_unlock(&block_group->space_info->lock); - last = max_t(u64, block_group->key.objectid, BTRFS_SUPER_INFO_OFFSET); /* @@ -467,8 +462,10 @@ static int cache_block_group(struct btrfs_block_group_cache *cache, cache->cached = BTRFS_CACHE_NO; } spin_unlock(&cache->lock); - if (ret == 1) + if (ret == 1) { + free_excluded_extents(fs_info->extent_root, cache); return 0; + } } if (load_cache_only) @@ -3344,8 +3341,10 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans, u64 reserved; u64 max_reclaim; u64 reclaimed = 0; + long time_left; int pause = 1; int nr_pages = (2 * 1024 * 1024) >> PAGE_CACHE_SHIFT; + int loops = 0; block_rsv = &root->fs_info->delalloc_block_rsv; space_info = block_rsv->space_info; @@ -3358,7 +3357,7 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans, max_reclaim = min(reserved, to_reclaim); - while (1) { + while (loops < 1024) { /* have the flusher threads jump in and do some IO */ smp_mb(); nr_pages = min_t(unsigned long, nr_pages, @@ -3366,8 +3365,12 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans, writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages); spin_lock(&space_info->lock); - if (reserved > space_info->bytes_reserved) + if (reserved > space_info->bytes_reserved) { + loops = 0; reclaimed += reserved - space_info->bytes_reserved; + } else { + loops++; + } reserved = space_info->bytes_reserved; spin_unlock(&space_info->lock); @@ -3378,7 +3381,12 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans, return -EAGAIN; __set_current_state(TASK_INTERRUPTIBLE); - schedule_timeout(pause); + time_left = schedule_timeout(pause); + + /* We were interrupted, exit */ + if (time_left) + break; + pause <<= 1; if (pause > HZ / 10) pause = HZ / 10; @@ -3588,8 +3596,20 @@ void block_rsv_release_bytes(struct btrfs_block_rsv *block_rsv, if (num_bytes > 0) { if (dest) { - block_rsv_add_bytes(dest, num_bytes, 0); - } else { + spin_lock(&dest->lock); + if (!dest->full) { + u64 bytes_to_add; + + bytes_to_add = dest->size - dest->reserved; + bytes_to_add = min(num_bytes, bytes_to_add); + dest->reserved += bytes_to_add; + if (dest->reserved >= dest->size) + dest->full = 1; + num_bytes -= bytes_to_add; + } + spin_unlock(&dest->lock); + } + if (num_bytes) { spin_lock(&space_info->lock); space_info->bytes_reserved -= num_bytes; spin_unlock(&space_info->lock); @@ -4012,6 +4032,7 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes) num_bytes = ALIGN(num_bytes, root->sectorsize); atomic_dec(&BTRFS_I(inode)->outstanding_extents); + WARN_ON(atomic_read(&BTRFS_I(inode)->outstanding_extents) < 0); spin_lock(&BTRFS_I(inode)->accounting_lock); nr_extents = atomic_read(&BTRFS_I(inode)->outstanding_extents); @@ -5355,7 +5376,7 @@ again: num_bytes, data, 1); goto again; } - if (ret == -ENOSPC) { + if (ret == -ENOSPC && btrfs_test_opt(root, ENOSPC_DEBUG)) { struct btrfs_space_info *sinfo; sinfo = __find_space_info(root->fs_info, data); @@ -5633,6 +5654,7 @@ use_block_rsv(struct btrfs_trans_handle *trans, struct btrfs_root *root, u32 blocksize) { struct btrfs_block_rsv *block_rsv; + struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv; int ret; block_rsv = get_block_rsv(trans, root); @@ -5640,14 +5662,39 @@ use_block_rsv(struct btrfs_trans_handle *trans, if (block_rsv->size == 0) { ret = reserve_metadata_bytes(trans, root, block_rsv, blocksize, 0); - if (ret) + /* + * If we couldn't reserve metadata bytes try and use some from + * the global reserve. + */ + if (ret && block_rsv != global_rsv) { + ret = block_rsv_use_bytes(global_rsv, blocksize); + if (!ret) + return global_rsv; + return ERR_PTR(ret); + } else if (ret) { return ERR_PTR(ret); + } return block_rsv; } ret = block_rsv_use_bytes(block_rsv, blocksize); if (!ret) return block_rsv; + if (ret) { + WARN_ON(1); + ret = reserve_metadata_bytes(trans, root, block_rsv, blocksize, + 0); + if (!ret) { + spin_lock(&block_rsv->lock); + block_rsv->size += blocksize; + spin_unlock(&block_rsv->lock); + return block_rsv; + } else if (ret && block_rsv != global_rsv) { + ret = block_rsv_use_bytes(global_rsv, blocksize); + if (!ret) + return global_rsv; + } + } return ERR_PTR(-ENOSPC); } @@ -6221,6 +6268,8 @@ int btrfs_drop_snapshot(struct btrfs_root *root, BUG_ON(!wc); trans = btrfs_start_transaction(tree_root, 0); + BUG_ON(IS_ERR(trans)); + if (block_rsv) trans->block_rsv = block_rsv; @@ -6318,6 +6367,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root, btrfs_end_transaction_throttle(trans, tree_root); trans = btrfs_start_transaction(tree_root, 0); + BUG_ON(IS_ERR(trans)); if (block_rsv) trans->block_rsv = block_rsv; } @@ -6446,6 +6496,8 @@ static noinline int relocate_inode_pages(struct inode *inode, u64 start, int ret = 0; ra = kzalloc(sizeof(*ra), GFP_NOFS); + if (!ra) + return -ENOMEM; mutex_lock(&inode->i_mutex); first_index = start >> PAGE_CACHE_SHIFT; @@ -6531,7 +6583,7 @@ static noinline int relocate_data_extent(struct inode *reloc_inode, u64 end = start + extent_key->offset - 1; em = alloc_extent_map(GFP_NOFS); - BUG_ON(!em || IS_ERR(em)); + BUG_ON(!em); em->start = start; em->len = extent_key->offset; @@ -7477,7 +7529,7 @@ int btrfs_drop_dead_reloc_roots(struct btrfs_root *root) BUG_ON(reloc_root->commit_root != NULL); while (1) { trans = btrfs_join_transaction(root, 1); - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); mutex_lock(&root->fs_info->drop_mutex); ret = btrfs_drop_snapshot(trans, reloc_root); @@ -7535,7 +7587,7 @@ int btrfs_cleanup_reloc_trees(struct btrfs_root *root) if (found) { trans = btrfs_start_transaction(root, 1); - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); ret = btrfs_commit_transaction(trans, root); BUG_ON(ret); } @@ -7779,7 +7831,7 @@ static noinline int relocate_one_extent(struct btrfs_root *extent_root, trans = btrfs_start_transaction(extent_root, 1); - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); if (extent_key->objectid == 0) { ret = del_extent_zero(trans, extent_root, path, extent_key); @@ -8013,6 +8065,13 @@ out: return ret; } +int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, + struct btrfs_root *root, u64 type) +{ + u64 alloc_flags = get_alloc_profile(root, type); + return do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags, 1); +} + /* * helper to account the unused space of all the readonly block group in the * list. takes mirrors into account. @@ -8270,6 +8329,13 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info) if (block_group->cached == BTRFS_CACHE_STARTED) wait_block_group_cache_done(block_group); + /* + * We haven't cached this block group, which means we could + * possibly have excluded extents on this block group. + */ + if (block_group->cached == BTRFS_CACHE_NO) + free_excluded_extents(info->extent_root, block_group); + btrfs_remove_free_space_cache(block_group); btrfs_put_block_group(block_group); @@ -8385,6 +8451,13 @@ int btrfs_read_block_groups(struct btrfs_root *root) cache->sectorsize = root->sectorsize; /* + * We need to exclude the super stripes now so that the space + * info has super bytes accounted for, otherwise we'll think + * we have more space than we actually do. + */ + exclude_super_stripes(root, cache); + + /* * check for two cases, either we are full, and therefore * don't need to bother with the caching work since we won't * find any space, or we are empty, and we can just add all @@ -8392,12 +8465,10 @@ int btrfs_read_block_groups(struct btrfs_root *root) * time, particularly in the full case. */ if (found_key.offset == btrfs_block_group_used(&cache->item)) { - exclude_super_stripes(root, cache); cache->last_byte_to_unpin = (u64)-1; cache->cached = BTRFS_CACHE_FINISHED; free_excluded_extents(root, cache); } else if (btrfs_block_group_used(&cache->item) == 0) { - exclude_super_stripes(root, cache); cache->last_byte_to_unpin = (u64)-1; cache->cached = BTRFS_CACHE_FINISHED; add_new_free_space(cache, root->fs_info, diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 2e993cf1766e..fd3f172e94e6 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1433,12 +1433,13 @@ int extent_clear_unlock_delalloc(struct inode *inode, */ u64 count_range_bits(struct extent_io_tree *tree, u64 *start, u64 search_end, u64 max_bytes, - unsigned long bits) + unsigned long bits, int contig) { struct rb_node *node; struct extent_state *state; u64 cur_start = *start; u64 total_bytes = 0; + u64 last = 0; int found = 0; if (search_end <= cur_start) { @@ -1463,7 +1464,9 @@ u64 count_range_bits(struct extent_io_tree *tree, state = rb_entry(node, struct extent_state, rb_node); if (state->start > search_end) break; - if (state->end >= cur_start && (state->state & bits)) { + if (contig && found && state->start > last + 1) + break; + if (state->end >= cur_start && (state->state & bits) == bits) { total_bytes += min(search_end, state->end) + 1 - max(cur_start, state->start); if (total_bytes >= max_bytes) @@ -1472,6 +1475,9 @@ u64 count_range_bits(struct extent_io_tree *tree, *start = state->start; found = 1; } + last = state->end; + } else if (contig && found) { + break; } node = rb_next(node); if (!node) @@ -1865,7 +1871,7 @@ static int submit_one_bio(int rw, struct bio *bio, int mirror_num, bio_get(bio); if (tree->ops && tree->ops->submit_bio_hook) - tree->ops->submit_bio_hook(page->mapping->host, rw, bio, + ret = tree->ops->submit_bio_hook(page->mapping->host, rw, bio, mirror_num, bio_flags, start); else submit_bio(rw, bio); @@ -1920,6 +1926,8 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree, nr = bio_get_nr_vecs(bdev); bio = btrfs_bio_alloc(bdev, sector, nr, GFP_NOFS | __GFP_HIGH); + if (!bio) + return -ENOMEM; bio_add_page(bio, page, page_size, offset); bio->bi_end_io = end_io_func; @@ -1944,6 +1952,7 @@ void set_page_extent_mapped(struct page *page) static void set_page_extent_head(struct page *page, unsigned long len) { + WARN_ON(!PagePrivate(page)); set_page_private(page, EXTENT_PAGE_PRIVATE_FIRST_PAGE | len << 2); } @@ -2126,7 +2135,7 @@ int extent_read_full_page(struct extent_io_tree *tree, struct page *page, ret = __extent_read_full_page(tree, page, get_extent, &bio, 0, &bio_flags); if (bio) - submit_one_bio(READ, bio, 0, bio_flags); + ret = submit_one_bio(READ, bio, 0, bio_flags); return ret; } @@ -2819,9 +2828,17 @@ int try_release_extent_state(struct extent_map_tree *map, * at this point we can safely clear everything except the * locked bit and the nodatasum bit */ - clear_extent_bit(tree, start, end, + ret = clear_extent_bit(tree, start, end, ~(EXTENT_LOCKED | EXTENT_NODATASUM), 0, 0, NULL, mask); + + /* if clear_extent_bit failed for enomem reasons, + * we can't allow the release to continue. + */ + if (ret < 0) + ret = 0; + else + ret = 1; } return ret; } @@ -2901,6 +2918,46 @@ out: return sector; } +/* + * helper function for fiemap, which doesn't want to see any holes. + * This maps until we find something past 'last' + */ +static struct extent_map *get_extent_skip_holes(struct inode *inode, + u64 offset, + u64 last, + get_extent_t *get_extent) +{ + u64 sectorsize = BTRFS_I(inode)->root->sectorsize; + struct extent_map *em; + u64 len; + + if (offset >= last) + return NULL; + + while(1) { + len = last - offset; + if (len == 0) + break; + len = (len + sectorsize - 1) & ~(sectorsize - 1); + em = get_extent(inode, NULL, 0, offset, len, 0); + if (!em || IS_ERR(em)) + return em; + + /* if this isn't a hole return it */ + if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags) && + em->block_start != EXTENT_MAP_HOLE) { + return em; + } + + /* this is a hole, advance to the next extent */ + offset = extent_map_end(em); + free_extent_map(em); + if (offset >= last) + break; + } + return NULL; +} + int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len, get_extent_t *get_extent) { @@ -2910,16 +2967,19 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u32 flags = 0; u32 found_type; u64 last; + u64 last_for_get_extent = 0; u64 disko = 0; + u64 isize = i_size_read(inode); struct btrfs_key found_key; struct extent_map *em = NULL; struct extent_state *cached_state = NULL; struct btrfs_path *path; struct btrfs_file_extent_item *item; int end = 0; - u64 em_start = 0, em_len = 0; + u64 em_start = 0; + u64 em_len = 0; + u64 em_end = 0; unsigned long emflags; - int hole = 0; if (len == 0) return -EINVAL; @@ -2929,6 +2989,10 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, return -ENOMEM; path->leave_spinning = 1; + /* + * lookup the last file extent. We're not using i_size here + * because there might be preallocation past i_size + */ ret = btrfs_lookup_file_extent(NULL, BTRFS_I(inode)->root, path, inode->i_ino, -1, 0); if (ret < 0) { @@ -2942,18 +3006,38 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, btrfs_item_key_to_cpu(path->nodes[0], &found_key, path->slots[0]); found_type = btrfs_key_type(&found_key); - /* No extents, just return */ + /* No extents, but there might be delalloc bits */ if (found_key.objectid != inode->i_ino || found_type != BTRFS_EXTENT_DATA_KEY) { - btrfs_free_path(path); - return 0; + /* have to trust i_size as the end */ + last = (u64)-1; + last_for_get_extent = isize; + } else { + /* + * remember the start of the last extent. There are a + * bunch of different factors that go into the length of the + * extent, so its much less complex to remember where it started + */ + last = found_key.offset; + last_for_get_extent = last + 1; } - last = found_key.offset; btrfs_free_path(path); + /* + * we might have some extents allocated but more delalloc past those + * extents. so, we trust isize unless the start of the last extent is + * beyond isize + */ + if (last < isize) { + last = (u64)-1; + last_for_get_extent = isize; + } + lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len, 0, &cached_state, GFP_NOFS); - em = get_extent(inode, NULL, 0, off, max - off, 0); + + em = get_extent_skip_holes(inode, off, last_for_get_extent, + get_extent); if (!em) goto out; if (IS_ERR(em)) { @@ -2962,19 +3046,14 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, } while (!end) { - hole = 0; - off = em->start + em->len; + off = extent_map_end(em); if (off >= max) end = 1; - if (em->block_start == EXTENT_MAP_HOLE) { - hole = 1; - goto next; - } - em_start = em->start; em_len = em->len; - + em_end = extent_map_end(em); + emflags = em->flags; disko = 0; flags = 0; @@ -2993,37 +3072,29 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) flags |= FIEMAP_EXTENT_ENCODED; -next: - emflags = em->flags; free_extent_map(em); em = NULL; - if (!end) { - em = get_extent(inode, NULL, 0, off, max - off, 0); - if (!em) - goto out; - if (IS_ERR(em)) { - ret = PTR_ERR(em); - goto out; - } - emflags = em->flags; - } - - if (test_bit(EXTENT_FLAG_VACANCY, &emflags)) { + if ((em_start >= last) || em_len == (u64)-1 || + (last == (u64)-1 && isize <= em_end)) { flags |= FIEMAP_EXTENT_LAST; end = 1; } - if (em_start == last) { + /* now scan forward to see if this is really the last extent. */ + em = get_extent_skip_holes(inode, off, last_for_get_extent, + get_extent); + if (IS_ERR(em)) { + ret = PTR_ERR(em); + goto out; + } + if (!em) { flags |= FIEMAP_EXTENT_LAST; end = 1; } - - if (!hole) { - ret = fiemap_fill_next_extent(fieinfo, em_start, disko, - em_len, flags); - if (ret) - goto out_free; - } + ret = fiemap_fill_next_extent(fieinfo, em_start, disko, + em_len, flags); + if (ret) + goto out_free; } out_free: free_extent_map(em); @@ -3192,7 +3263,13 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, } if (!PageUptodate(p)) uptodate = 0; - unlock_page(p); + + /* + * see below about how we avoid a nasty race with release page + * and why we unlock later + */ + if (i != 0) + unlock_page(p); } if (uptodate) set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags); @@ -3216,9 +3293,26 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, atomic_inc(&eb->refs); spin_unlock(&tree->buffer_lock); radix_tree_preload_end(); + + /* + * there is a race where release page may have + * tried to find this extent buffer in the radix + * but failed. It will tell the VM it is safe to + * reclaim the, and it will clear the page private bit. + * We must make sure to set the page private bit properly + * after the extent buffer is in the radix tree so + * it doesn't get lost + */ + set_page_extent_mapped(eb->first_page); + set_page_extent_head(eb->first_page, eb->len); + if (!page0) + unlock_page(eb->first_page); return eb; free_eb: + if (eb->first_page && !page0) + unlock_page(eb->first_page); + if (!atomic_dec_and_test(&eb->refs)) return exists; btrfs_release_extent_buffer(eb); @@ -3269,10 +3363,11 @@ int clear_extent_buffer_dirty(struct extent_io_tree *tree, continue; lock_page(page); + WARN_ON(!PagePrivate(page)); + + set_page_extent_mapped(page); if (i == 0) set_page_extent_head(page, eb->len); - else - set_page_private(page, EXTENT_PAGE_PRIVATE); clear_page_dirty_for_io(page); spin_lock_irq(&page->mapping->tree_lock); @@ -3462,6 +3557,13 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, for (i = start_i; i < num_pages; i++) { page = extent_buffer_page(eb, i); + + WARN_ON(!PagePrivate(page)); + + set_page_extent_mapped(page); + if (i == 0) + set_page_extent_head(page, eb->len); + if (inc_all_pages) page_cache_get(page); if (!PageUptodate(page)) { diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 7083cfafd061..9318dfefd59c 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -191,7 +191,7 @@ void extent_io_exit(void); u64 count_range_bits(struct extent_io_tree *tree, u64 *start, u64 search_end, - u64 max_bytes, unsigned long bits); + u64 max_bytes, unsigned long bits, int contig); void free_extent_state(struct extent_state *state); int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index b0e1fce12530..2b6c12e983b3 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -51,8 +51,8 @@ struct extent_map *alloc_extent_map(gfp_t mask) { struct extent_map *em; em = kmem_cache_alloc(extent_map_cache, mask); - if (!em || IS_ERR(em)) - return em; + if (!em) + return NULL; em->in_tree = 0; em->flags = 0; em->compress_type = BTRFS_COMPRESS_NONE; diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index a562a250ae77..4f19a3e1bf32 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -536,6 +536,8 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans, root = root->fs_info->csum_root; path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; while (1) { key.objectid = BTRFS_EXTENT_CSUM_OBJECTID; @@ -548,7 +550,10 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans, if (path->slots[0] == 0) goto out; path->slots[0]--; + } else if (ret < 0) { + goto out; } + leaf = path->nodes[0]; btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index c800d58f3013..7084140d5940 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -186,6 +186,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split = alloc_extent_map(GFP_NOFS); if (!split2) split2 = alloc_extent_map(GFP_NOFS); + BUG_ON(!split || !split2); write_lock(&em_tree->lock); em = lookup_extent_mapping(em_tree, start, len); @@ -793,8 +794,12 @@ again: for (i = 0; i < num_pages; i++) { pages[i] = grab_cache_page(inode->i_mapping, index + i); if (!pages[i]) { - err = -ENOMEM; - BUG_ON(1); + int c; + for (c = i - 1; c >= 0; c--) { + unlock_page(pages[c]); + page_cache_release(pages[c]); + } + return -ENOMEM; } wait_on_page_writeback(pages[i]); } @@ -946,6 +951,10 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, PAGE_CACHE_SIZE, PAGE_CACHE_SIZE / (sizeof(struct page *))); pages = kmalloc(nrptrs * sizeof(struct page *), GFP_KERNEL); + if (!pages) { + ret = -ENOMEM; + goto out; + } /* generic_write_checks can change our pos */ start_pos = pos; @@ -984,8 +993,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, size_t write_bytes = min(iov_iter_count(&i), nrptrs * (size_t)PAGE_CACHE_SIZE - offset); - size_t num_pages = (write_bytes + PAGE_CACHE_SIZE - 1) >> - PAGE_CACHE_SHIFT; + size_t num_pages = (write_bytes + offset + + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; WARN_ON(num_pages > nrptrs); memset(pages, 0, sizeof(struct page *) * nrptrs); @@ -1015,8 +1024,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, copied = btrfs_copy_from_user(pos, num_pages, write_bytes, pages, &i); - dirty_pages = (copied + PAGE_CACHE_SIZE - 1) >> - PAGE_CACHE_SHIFT; + dirty_pages = (copied + offset + PAGE_CACHE_SIZE - 1) >> + PAGE_CACHE_SHIFT; if (num_pages > dirty_pages) { if (copied > 0) diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index 60d684266959..a0390657451b 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -987,11 +987,18 @@ tree_search_offset(struct btrfs_block_group_cache *block_group, return entry; } -static void unlink_free_space(struct btrfs_block_group_cache *block_group, - struct btrfs_free_space *info) +static inline void +__unlink_free_space(struct btrfs_block_group_cache *block_group, + struct btrfs_free_space *info) { rb_erase(&info->offset_index, &block_group->free_space_offset); block_group->free_extents--; +} + +static void unlink_free_space(struct btrfs_block_group_cache *block_group, + struct btrfs_free_space *info) +{ + __unlink_free_space(block_group, info); block_group->free_space -= info->bytes; } @@ -1016,14 +1023,18 @@ static void recalculate_thresholds(struct btrfs_block_group_cache *block_group) u64 max_bytes; u64 bitmap_bytes; u64 extent_bytes; + u64 size = block_group->key.offset; /* * The goal is to keep the total amount of memory used per 1gb of space * at or below 32k, so we need to adjust how much memory we allow to be * used by extent based free space tracking */ - max_bytes = MAX_CACHE_BYTES_PER_GIG * - (div64_u64(block_group->key.offset, 1024 * 1024 * 1024)); + if (size < 1024 * 1024 * 1024) + max_bytes = MAX_CACHE_BYTES_PER_GIG; + else + max_bytes = MAX_CACHE_BYTES_PER_GIG * + div64_u64(size, 1024 * 1024 * 1024); /* * we want to account for 1 more bitmap than what we have so we can make @@ -1171,6 +1182,16 @@ static void add_new_bitmap(struct btrfs_block_group_cache *block_group, recalculate_thresholds(block_group); } +static void free_bitmap(struct btrfs_block_group_cache *block_group, + struct btrfs_free_space *bitmap_info) +{ + unlink_free_space(block_group, bitmap_info); + kfree(bitmap_info->bitmap); + kfree(bitmap_info); + block_group->total_bitmaps--; + recalculate_thresholds(block_group); +} + static noinline int remove_from_bitmap(struct btrfs_block_group_cache *block_group, struct btrfs_free_space *bitmap_info, u64 *offset, u64 *bytes) @@ -1195,6 +1216,7 @@ again: */ search_start = *offset; search_bytes = *bytes; + search_bytes = min(search_bytes, end - search_start + 1); ret = search_bitmap(block_group, bitmap_info, &search_start, &search_bytes); BUG_ON(ret < 0 || search_start != *offset); @@ -1211,13 +1233,8 @@ again: if (*bytes) { struct rb_node *next = rb_next(&bitmap_info->offset_index); - if (!bitmap_info->bytes) { - unlink_free_space(block_group, bitmap_info); - kfree(bitmap_info->bitmap); - kfree(bitmap_info); - block_group->total_bitmaps--; - recalculate_thresholds(block_group); - } + if (!bitmap_info->bytes) + free_bitmap(block_group, bitmap_info); /* * no entry after this bitmap, but we still have bytes to @@ -1250,13 +1267,8 @@ again: return -EAGAIN; goto again; - } else if (!bitmap_info->bytes) { - unlink_free_space(block_group, bitmap_info); - kfree(bitmap_info->bitmap); - kfree(bitmap_info); - block_group->total_bitmaps--; - recalculate_thresholds(block_group); - } + } else if (!bitmap_info->bytes) + free_bitmap(block_group, bitmap_info); return 0; } @@ -1359,22 +1371,14 @@ out: return ret; } -int btrfs_add_free_space(struct btrfs_block_group_cache *block_group, - u64 offset, u64 bytes) +bool try_merge_free_space(struct btrfs_block_group_cache *block_group, + struct btrfs_free_space *info, bool update_stat) { - struct btrfs_free_space *right_info = NULL; - struct btrfs_free_space *left_info = NULL; - struct btrfs_free_space *info = NULL; - int ret = 0; - - info = kzalloc(sizeof(struct btrfs_free_space), GFP_NOFS); - if (!info) - return -ENOMEM; - - info->offset = offset; - info->bytes = bytes; - - spin_lock(&block_group->tree_lock); + struct btrfs_free_space *left_info; + struct btrfs_free_space *right_info; + bool merged = false; + u64 offset = info->offset; + u64 bytes = info->bytes; /* * first we want to see if there is free space adjacent to the range we @@ -1388,37 +1392,62 @@ int btrfs_add_free_space(struct btrfs_block_group_cache *block_group, else left_info = tree_search_offset(block_group, offset - 1, 0, 0); - /* - * If there was no extent directly to the left or right of this new - * extent then we know we're going to have to allocate a new extent, so - * before we do that see if we need to drop this into a bitmap - */ - if ((!left_info || left_info->bitmap) && - (!right_info || right_info->bitmap)) { - ret = insert_into_bitmap(block_group, info); - - if (ret < 0) { - goto out; - } else if (ret) { - ret = 0; - goto out; - } - } - if (right_info && !right_info->bitmap) { - unlink_free_space(block_group, right_info); + if (update_stat) + unlink_free_space(block_group, right_info); + else + __unlink_free_space(block_group, right_info); info->bytes += right_info->bytes; kfree(right_info); + merged = true; } if (left_info && !left_info->bitmap && left_info->offset + left_info->bytes == offset) { - unlink_free_space(block_group, left_info); + if (update_stat) + unlink_free_space(block_group, left_info); + else + __unlink_free_space(block_group, left_info); info->offset = left_info->offset; info->bytes += left_info->bytes; kfree(left_info); + merged = true; } + return merged; +} + +int btrfs_add_free_space(struct btrfs_block_group_cache *block_group, + u64 offset, u64 bytes) +{ + struct btrfs_free_space *info; + int ret = 0; + + info = kzalloc(sizeof(struct btrfs_free_space), GFP_NOFS); + if (!info) + return -ENOMEM; + + info->offset = offset; + info->bytes = bytes; + + spin_lock(&block_group->tree_lock); + + if (try_merge_free_space(block_group, info, true)) + goto link; + + /* + * There was no extent directly to the left or right of this new + * extent then we know we're going to have to allocate a new extent, so + * before we do that see if we need to drop this into a bitmap + */ + ret = insert_into_bitmap(block_group, info); + if (ret < 0) { + goto out; + } else if (ret) { + ret = 0; + goto out; + } +link: ret = link_free_space(block_group, info); if (ret) kfree(info); @@ -1621,6 +1650,7 @@ __btrfs_return_cluster_to_free_space( node = rb_next(&entry->offset_index); rb_erase(&entry->offset_index, &cluster->root); BUG_ON(entry->bitmap); + try_merge_free_space(block_group, entry, false); tree_insert_offset(&block_group->free_space_offset, entry->offset, &entry->offset_index, 0); } @@ -1685,13 +1715,8 @@ u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group, ret = offset; if (entry->bitmap) { bitmap_clear_bits(block_group, entry, offset, bytes); - if (!entry->bytes) { - unlink_free_space(block_group, entry); - kfree(entry->bitmap); - kfree(entry); - block_group->total_bitmaps--; - recalculate_thresholds(block_group); - } + if (!entry->bytes) + free_bitmap(block_group, entry); } else { unlink_free_space(block_group, entry); entry->offset += bytes; @@ -1789,6 +1814,8 @@ static u64 btrfs_alloc_from_bitmap(struct btrfs_block_group_cache *block_group, ret = search_start; bitmap_clear_bits(block_group, entry, ret, bytes); + if (entry->bytes == 0) + free_bitmap(block_group, entry); out: spin_unlock(&cluster->lock); spin_unlock(&block_group->tree_lock); @@ -1842,15 +1869,26 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group, entry->offset += bytes; entry->bytes -= bytes; - if (entry->bytes == 0) { + if (entry->bytes == 0) rb_erase(&entry->offset_index, &cluster->root); - kfree(entry); - } break; } out: spin_unlock(&cluster->lock); + if (!ret) + return 0; + + spin_lock(&block_group->tree_lock); + + block_group->free_space -= bytes; + if (entry->bytes == 0) { + block_group->free_extents--; + kfree(entry); + } + + spin_unlock(&block_group->tree_lock); + return ret; } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 160b55b3e132..0efdb65953c5 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -416,7 +416,7 @@ again: } if (start == 0) { trans = btrfs_join_transaction(root, 1); - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); btrfs_set_trans_block_group(trans, inode); trans->block_rsv = &root->fs_info->delalloc_block_rsv; @@ -612,6 +612,7 @@ retry: GFP_NOFS); trans = btrfs_join_transaction(root, 1); + BUG_ON(IS_ERR(trans)); ret = btrfs_reserve_extent(trans, root, async_extent->compressed_size, async_extent->compressed_size, @@ -643,6 +644,7 @@ retry: async_extent->ram_size - 1, 0); em = alloc_extent_map(GFP_NOFS); + BUG_ON(!em); em->start = async_extent->start; em->len = async_extent->ram_size; em->orig_start = em->start; @@ -771,7 +773,7 @@ static noinline int cow_file_range(struct inode *inode, BUG_ON(root == root->fs_info->tree_root); trans = btrfs_join_transaction(root, 1); - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); btrfs_set_trans_block_group(trans, inode); trans->block_rsv = &root->fs_info->delalloc_block_rsv; @@ -819,6 +821,7 @@ static noinline int cow_file_range(struct inode *inode, BUG_ON(ret); em = alloc_extent_map(GFP_NOFS); + BUG_ON(!em); em->start = start; em->orig_start = em->start; ram_size = ins.offset; @@ -1049,7 +1052,7 @@ static noinline int run_delalloc_nocow(struct inode *inode, } else { trans = btrfs_join_transaction(root, 1); } - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); cow_start = (u64)-1; cur_offset = start; @@ -1168,6 +1171,7 @@ out_check: struct extent_map_tree *em_tree; em_tree = &BTRFS_I(inode)->extent_tree; em = alloc_extent_map(GFP_NOFS); + BUG_ON(!em); em->start = cur_offset; em->orig_start = em->start; em->len = num_bytes; @@ -1557,6 +1561,7 @@ out: out_page: unlock_page(page); page_cache_release(page); + kfree(fixup); } /* @@ -1703,7 +1708,7 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) trans = btrfs_join_transaction_nolock(root, 1); else trans = btrfs_join_transaction(root, 1); - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); btrfs_set_trans_block_group(trans, inode); trans->block_rsv = &root->fs_info->delalloc_block_rsv; ret = btrfs_update_inode(trans, root, inode); @@ -1720,6 +1725,7 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) trans = btrfs_join_transaction_nolock(root, 1); else trans = btrfs_join_transaction(root, 1); + BUG_ON(IS_ERR(trans)); btrfs_set_trans_block_group(trans, inode); trans->block_rsv = &root->fs_info->delalloc_block_rsv; @@ -1907,7 +1913,7 @@ static int btrfs_clean_io_failures(struct inode *inode, u64 start) private = 0; if (count_range_bits(&BTRFS_I(inode)->io_failure_tree, &private, - (u64)-1, 1, EXTENT_DIRTY)) { + (u64)-1, 1, EXTENT_DIRTY, 0)) { ret = get_state_private(&BTRFS_I(inode)->io_failure_tree, start, &private_failure); if (ret == 0) { @@ -2354,6 +2360,7 @@ void btrfs_orphan_cleanup(struct btrfs_root *root) */ if (is_bad_inode(inode)) { trans = btrfs_start_transaction(root, 0); + BUG_ON(IS_ERR(trans)); btrfs_orphan_del(trans, inode); btrfs_end_transaction(trans, root); iput(inode); @@ -2381,6 +2388,7 @@ void btrfs_orphan_cleanup(struct btrfs_root *root) if (root->orphan_block_rsv || root->orphan_item_inserted) { trans = btrfs_join_transaction(root, 1); + BUG_ON(IS_ERR(trans)); btrfs_end_transaction(trans, root); } @@ -2641,7 +2649,7 @@ int btrfs_unlink_inode(struct btrfs_trans_handle *trans, path = btrfs_alloc_path(); if (!path) { ret = -ENOMEM; - goto err; + goto out; } path->leave_spinning = 1; @@ -2714,9 +2722,10 @@ static int check_path_shared(struct btrfs_root *root, struct extent_buffer *eb; int level; u64 refs = 1; - int uninitialized_var(ret); for (level = 0; level < BTRFS_MAX_LEVEL; level++) { + int ret; + if (!path->nodes[level]) break; eb = path->nodes[level]; @@ -2727,7 +2736,7 @@ static int check_path_shared(struct btrfs_root *root, if (refs > 1) return 1; } - return ret; /* XXX callers? */ + return 0; } /* @@ -4134,7 +4143,7 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry) } srcu_read_unlock(&root->fs_info->subvol_srcu, index); - if (root != sub_root) { + if (!IS_ERR(inode) && root != sub_root) { down_read(&root->fs_info->cleanup_work_sem); if (!(inode->i_sb->s_flags & MS_RDONLY)) btrfs_orphan_cleanup(sub_root); @@ -4347,6 +4356,8 @@ int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc) trans = btrfs_join_transaction_nolock(root, 1); else trans = btrfs_join_transaction(root, 1); + if (IS_ERR(trans)) + return PTR_ERR(trans); btrfs_set_trans_block_group(trans, inode); if (nolock) ret = btrfs_end_transaction_nolock(trans, root); @@ -4372,6 +4383,7 @@ void btrfs_dirty_inode(struct inode *inode) return; trans = btrfs_join_transaction(root, 1); + BUG_ON(IS_ERR(trans)); btrfs_set_trans_block_group(trans, inode); ret = btrfs_update_inode(trans, root, inode); @@ -5176,6 +5188,8 @@ again: em = NULL; btrfs_release_path(root, path); trans = btrfs_join_transaction(root, 1); + if (IS_ERR(trans)) + return ERR_CAST(trans); goto again; } map = kmap(page); @@ -5266,6 +5280,128 @@ out: return em; } +struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, + size_t pg_offset, u64 start, u64 len, + int create) +{ + struct extent_map *em; + struct extent_map *hole_em = NULL; + u64 range_start = start; + u64 end; + u64 found; + u64 found_end; + int err = 0; + + em = btrfs_get_extent(inode, page, pg_offset, start, len, create); + if (IS_ERR(em)) + return em; + if (em) { + /* + * if our em maps to a hole, there might + * actually be delalloc bytes behind it + */ + if (em->block_start != EXTENT_MAP_HOLE) + return em; + else + hole_em = em; + } + + /* check to see if we've wrapped (len == -1 or similar) */ + end = start + len; + if (end < start) + end = (u64)-1; + else + end -= 1; + + em = NULL; + + /* ok, we didn't find anything, lets look for delalloc */ + found = count_range_bits(&BTRFS_I(inode)->io_tree, &range_start, + end, len, EXTENT_DELALLOC, 1); + found_end = range_start + found; + if (found_end < range_start) + found_end = (u64)-1; + + /* + * we didn't find anything useful, return + * the original results from get_extent() + */ + if (range_start > end || found_end <= start) { + em = hole_em; + hole_em = NULL; + goto out; + } + + /* adjust the range_start to make sure it doesn't + * go backwards from the start they passed in + */ + range_start = max(start,range_start); + found = found_end - range_start; + + if (found > 0) { + u64 hole_start = start; + u64 hole_len = len; + + em = alloc_extent_map(GFP_NOFS); + if (!em) { + err = -ENOMEM; + goto out; + } + /* + * when btrfs_get_extent can't find anything it + * returns one huge hole + * + * make sure what it found really fits our range, and + * adjust to make sure it is based on the start from + * the caller + */ + if (hole_em) { + u64 calc_end = extent_map_end(hole_em); + + if (calc_end <= start || (hole_em->start > end)) { + free_extent_map(hole_em); + hole_em = NULL; + } else { + hole_start = max(hole_em->start, start); + hole_len = calc_end - hole_start; + } + } + em->bdev = NULL; + if (hole_em && range_start > hole_start) { + /* our hole starts before our delalloc, so we + * have to return just the parts of the hole + * that go until the delalloc starts + */ + em->len = min(hole_len, + range_start - hole_start); + em->start = hole_start; + em->orig_start = hole_start; + /* + * don't adjust block start at all, + * it is fixed at EXTENT_MAP_HOLE + */ + em->block_start = hole_em->block_start; + em->block_len = hole_len; + } else { + em->start = range_start; + em->len = found; + em->orig_start = range_start; + em->block_start = EXTENT_MAP_DELALLOC; + em->block_len = found; + } + } else if (hole_em) { + return hole_em; + } +out: + + free_extent_map(hole_em); + if (err) { + free_extent_map(em); + return ERR_PTR(err); + } + return em; +} + static struct extent_map *btrfs_new_extent_direct(struct inode *inode, u64 start, u64 len) { @@ -5280,8 +5416,8 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode, btrfs_drop_extent_cache(inode, start, start + len - 1, 0); trans = btrfs_join_transaction(root, 0); - if (!trans) - return ERR_PTR(-ENOMEM); + if (IS_ERR(trans)) + return ERR_CAST(trans); trans->block_rsv = &root->fs_info->delalloc_block_rsv; @@ -5505,7 +5641,7 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock, * while we look for nocow cross refs */ trans = btrfs_join_transaction(root, 0); - if (!trans) + if (IS_ERR(trans)) goto must_cow; if (can_nocow_odirect(trans, inode, start, len) == 1) { @@ -5640,7 +5776,7 @@ again: BUG_ON(!ordered); trans = btrfs_join_transaction(root, 1); - if (!trans) { + if (IS_ERR(trans)) { err = -ENOMEM; goto out; } @@ -6088,7 +6224,7 @@ out: static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len) { - return extent_fiemap(inode, fieinfo, start, len, btrfs_get_extent); + return extent_fiemap(inode, fieinfo, start, len, btrfs_get_extent_fiemap); } int btrfs_readpage(struct file *file, struct page *page) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index a506a22b522a..5fdb2abc4fa7 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -203,7 +203,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) trans = btrfs_join_transaction(root, 1); - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); ret = btrfs_update_inode(trans, root, inode); BUG_ON(ret); @@ -907,6 +907,10 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root, if (new_size > old_size) { trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto out_unlock; + } ret = btrfs_grow_device(trans, device, new_size); btrfs_commit_transaction(trans, root); } else { @@ -1067,12 +1071,15 @@ static noinline int btrfs_ioctl_subvol_setflags(struct file *file, if (copy_from_user(&flags, arg, sizeof(flags))) return -EFAULT; - if (flags & ~BTRFS_SUBVOL_CREATE_ASYNC) + if (flags & BTRFS_SUBVOL_CREATE_ASYNC) return -EINVAL; if (flags & ~BTRFS_SUBVOL_RDONLY) return -EOPNOTSUPP; + if (!is_owner_or_cap(inode)) + return -EACCES; + down_write(&root->fs_info->subvol_sem); /* nothing to do */ @@ -1093,7 +1100,7 @@ static noinline int btrfs_ioctl_subvol_setflags(struct file *file, goto out_reset; } - ret = btrfs_update_root(trans, root, + ret = btrfs_update_root(trans, root->fs_info->tree_root, &root->root_key, &root->root_item); btrfs_commit_transaction(trans, root); @@ -1898,7 +1905,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, memcpy(&new_key, &key, sizeof(new_key)); new_key.objectid = inode->i_ino; - new_key.offset = key.offset + destoff - off; + if (off <= key.offset) + new_key.offset = key.offset + destoff - off; + else + new_key.offset = destoff; trans = btrfs_start_transaction(root, 1); if (IS_ERR(trans)) { @@ -2082,7 +2092,7 @@ static long btrfs_ioctl_trans_start(struct file *file) ret = -ENOMEM; trans = btrfs_start_ioctl_transaction(root, 0); - if (!trans) + if (IS_ERR(trans)) goto out_drop; file->private_data = trans; @@ -2138,9 +2148,9 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) path->leave_spinning = 1; trans = btrfs_start_transaction(root, 1); - if (!trans) { + if (IS_ERR(trans)) { btrfs_free_path(path); - return -ENOMEM; + return PTR_ERR(trans); } dir_id = btrfs_super_root_dir(&root->fs_info->super_copy); @@ -2201,7 +2211,7 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) int num_types = 4; int alloc_size; int ret = 0; - int slot_count = 0; + u64 slot_count = 0; int i, c; if (copy_from_user(&space_args, @@ -2240,7 +2250,7 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) goto out; } - slot_count = min_t(int, space_args.space_slots, slot_count); + slot_count = min_t(u64, space_args.space_slots, slot_count); alloc_size = sizeof(*dest) * slot_count; @@ -2260,6 +2270,9 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) for (i = 0; i < num_types; i++) { struct btrfs_space_info *tmp; + if (!slot_count) + break; + info = NULL; rcu_read_lock(); list_for_each_entry_rcu(tmp, &root->fs_info->space_info, @@ -2281,7 +2294,10 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) memcpy(dest, &space, sizeof(space)); dest++; space_args.total_spaces++; + slot_count--; } + if (!slot_count) + break; } up_read(&info->groups_sem); } @@ -2334,6 +2350,8 @@ static noinline long btrfs_ioctl_start_sync(struct file *file, void __user *argp u64 transid; trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) + return PTR_ERR(trans); transid = trans->transid; btrfs_commit_transaction_async(trans, root, 0); diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c index cc9b450399df..a178f5ebea78 100644 --- a/fs/btrfs/lzo.c +++ b/fs/btrfs/lzo.c @@ -280,6 +280,7 @@ static int lzo_decompress_biovec(struct list_head *ws, unsigned long tot_out; unsigned long tot_len; char *buf; + bool may_late_unmap, need_unmap; data_in = kmap(pages_in[0]); tot_len = read_compress_length(data_in); @@ -300,11 +301,13 @@ static int lzo_decompress_biovec(struct list_head *ws, tot_in += in_len; working_bytes = in_len; + may_late_unmap = need_unmap = false; /* fast path: avoid using the working buffer */ if (in_page_bytes_left >= in_len) { buf = data_in + in_offset; bytes = in_len; + may_late_unmap = true; goto cont; } @@ -329,14 +332,17 @@ cont: if (working_bytes == 0 && tot_in >= tot_len) break; - kunmap(pages_in[page_in_index]); - page_in_index++; - if (page_in_index >= total_pages_in) { + if (page_in_index + 1 >= total_pages_in) { ret = -1; - data_in = NULL; goto done; } - data_in = kmap(pages_in[page_in_index]); + + if (may_late_unmap) + need_unmap = true; + else + kunmap(pages_in[page_in_index]); + + data_in = kmap(pages_in[++page_in_index]); in_page_bytes_left = PAGE_CACHE_SIZE; in_offset = 0; @@ -346,6 +352,8 @@ cont: out_len = lzo1x_worst_compress(PAGE_CACHE_SIZE); ret = lzo1x_decompress_safe(buf, in_len, workspace->buf, &out_len); + if (need_unmap) + kunmap(pages_in[page_in_index - 1]); if (ret != LZO_E_OK) { printk(KERN_WARNING "btrfs decompress failed\n"); ret = -1; @@ -363,8 +371,7 @@ cont: break; } done: - if (data_in) - kunmap(pages_in[page_in_index]); + kunmap(pages_in[page_in_index]); return ret; } diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 2b61e1ddcd99..083a55477375 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -141,7 +141,7 @@ static inline struct rb_node *tree_search(struct btrfs_ordered_inode_tree *tree, u64 file_offset) { struct rb_root *root = &tree->tree; - struct rb_node *prev; + struct rb_node *prev = NULL; struct rb_node *ret; struct btrfs_ordered_extent *entry; diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c index 0d126be22b63..fb2605d998e9 100644 --- a/fs/btrfs/print-tree.c +++ b/fs/btrfs/print-tree.c @@ -260,6 +260,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) #else BUG(); #endif + break; case BTRFS_BLOCK_GROUP_ITEM_KEY: bi = btrfs_item_ptr(l, i, struct btrfs_block_group_item); diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 045c9c2b2d7e..31ade5802ae8 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -1157,6 +1157,7 @@ static int clone_backref_node(struct btrfs_trans_handle *trans, new_node->bytenr = dest->node->start; new_node->level = node->level; new_node->lowest = node->lowest; + new_node->checked = 1; new_node->root = dest; if (!node->lowest) { @@ -2028,6 +2029,7 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc, while (1) { trans = btrfs_start_transaction(root, 0); + BUG_ON(IS_ERR(trans)); trans->block_rsv = rc->block_rsv; ret = btrfs_block_rsv_check(trans, root, rc->block_rsv, @@ -2147,6 +2149,12 @@ again: } trans = btrfs_join_transaction(rc->extent_root, 1); + if (IS_ERR(trans)) { + if (!err) + btrfs_block_rsv_release(rc->extent_root, + rc->block_rsv, num_bytes); + return PTR_ERR(trans); + } if (!err) { if (num_bytes != rc->merging_rsv_size) { @@ -3222,6 +3230,7 @@ truncate: trans = btrfs_join_transaction(root, 0); if (IS_ERR(trans)) { btrfs_free_path(path); + ret = PTR_ERR(trans); goto out; } @@ -3628,6 +3637,7 @@ int prepare_to_relocate(struct reloc_control *rc) set_reloc_control(rc); trans = btrfs_join_transaction(rc->extent_root, 1); + BUG_ON(IS_ERR(trans)); btrfs_commit_transaction(trans, rc->extent_root); return 0; } @@ -3644,6 +3654,7 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc) u32 item_size; int ret; int err = 0; + int progress = 0; path = btrfs_alloc_path(); if (!path) @@ -3656,8 +3667,10 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc) } while (1) { + progress++; trans = btrfs_start_transaction(rc->extent_root, 0); - + BUG_ON(IS_ERR(trans)); +restart: if (update_backref_cache(trans, &rc->backref_cache)) { btrfs_end_transaction(trans, rc->extent_root); continue; @@ -3770,6 +3783,15 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc) } } } + if (trans && progress && err == -ENOSPC) { + ret = btrfs_force_chunk_alloc(trans, rc->extent_root, + rc->block_group->flags); + if (ret == 0) { + err = 0; + progress = 0; + goto restart; + } + } btrfs_release_path(rc->extent_root, path); clear_extent_bits(&rc->processed_blocks, 0, (u64)-1, EXTENT_DIRTY, @@ -3804,7 +3826,10 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc) /* get rid of pinned extents */ trans = btrfs_join_transaction(rc->extent_root, 1); - btrfs_commit_transaction(trans, rc->extent_root); + if (IS_ERR(trans)) + err = PTR_ERR(trans); + else + btrfs_commit_transaction(trans, rc->extent_root); out_free: btrfs_free_block_rsv(rc->extent_root, rc->block_rsv); btrfs_free_path(path); @@ -4022,6 +4047,7 @@ static noinline_for_stack int mark_garbage_root(struct btrfs_root *root) int ret; trans = btrfs_start_transaction(root->fs_info->tree_root, 0); + BUG_ON(IS_ERR(trans)); memset(&root->root_item.drop_progress, 0, sizeof(root->root_item.drop_progress)); @@ -4125,6 +4151,11 @@ int btrfs_recover_relocation(struct btrfs_root *root) set_reloc_control(rc); trans = btrfs_join_transaction(rc->extent_root, 1); + if (IS_ERR(trans)) { + unset_reloc_control(rc); + err = PTR_ERR(trans); + goto out_free; + } rc->merge_reloc_tree = 1; @@ -4154,9 +4185,13 @@ int btrfs_recover_relocation(struct btrfs_root *root) unset_reloc_control(rc); trans = btrfs_join_transaction(rc->extent_root, 1); - btrfs_commit_transaction(trans, rc->extent_root); -out: + if (IS_ERR(trans)) + err = PTR_ERR(trans); + else + btrfs_commit_transaction(trans, rc->extent_root); +out_free: kfree(rc); +out: while (!list_empty(&reloc_roots)) { reloc_root = list_entry(reloc_roots.next, struct btrfs_root, root_list); diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index b2130c46fdb5..d39a9895d932 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -155,7 +155,8 @@ enum { Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_noacl, Opt_compress, Opt_compress_type, Opt_compress_force, Opt_compress_force_type, Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_discard, - Opt_space_cache, Opt_clear_cache, Opt_user_subvol_rm_allowed, Opt_err, + Opt_space_cache, Opt_clear_cache, Opt_user_subvol_rm_allowed, + Opt_enospc_debug, Opt_err, }; static match_table_t tokens = { @@ -184,6 +185,7 @@ static match_table_t tokens = { {Opt_space_cache, "space_cache"}, {Opt_clear_cache, "clear_cache"}, {Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"}, + {Opt_enospc_debug, "enospc_debug"}, {Opt_err, NULL}, }; @@ -358,6 +360,9 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) case Opt_user_subvol_rm_allowed: btrfs_set_opt(info->mount_opt, USER_SUBVOL_RM_ALLOWED); break; + case Opt_enospc_debug: + btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG); + break; case Opt_err: printk(KERN_INFO "btrfs: unrecognized mount option " "'%s'\n", p); @@ -383,7 +388,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags, struct btrfs_fs_devices **fs_devices) { substring_t args[MAX_OPT_ARGS]; - char *opts, *p; + char *opts, *orig, *p; int error = 0; int intarg; @@ -397,6 +402,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags, opts = kstrdup(options, GFP_KERNEL); if (!opts) return -ENOMEM; + orig = opts; while ((p = strsep(&opts, ",")) != NULL) { int token; @@ -432,7 +438,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags, } out_free_opts: - kfree(opts); + kfree(orig); out: /* * If no subvolume name is specified we use the default one. Allocate @@ -623,6 +629,8 @@ int btrfs_sync_fs(struct super_block *sb, int wait) btrfs_wait_ordered_extents(root, 0, 0); trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) + return PTR_ERR(trans); ret = btrfs_commit_transaction(trans, root); return ret; } @@ -761,6 +769,8 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags, } btrfs_close_devices(fs_devices); + kfree(fs_info); + kfree(tree_root); } else { char b[BDEVNAME_SIZE]; diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index bae5c7b8bbe2..3d73c8d93bbb 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1161,6 +1161,11 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, INIT_DELAYED_WORK(&ac->work, do_async_commit); ac->root = root; ac->newtrans = btrfs_join_transaction(root, 0); + if (IS_ERR(ac->newtrans)) { + int err = PTR_ERR(ac->newtrans); + kfree(ac); + return err; + } /* take transaction reference */ mutex_lock(&root->fs_info->trans_mutex); diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 054744ac5719..a4bbb854dfd2 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -338,6 +338,12 @@ static noinline int overwrite_item(struct btrfs_trans_handle *trans, } dst_copy = kmalloc(item_size, GFP_NOFS); src_copy = kmalloc(item_size, GFP_NOFS); + if (!dst_copy || !src_copy) { + btrfs_release_path(root, path); + kfree(dst_copy); + kfree(src_copy); + return -ENOMEM; + } read_extent_buffer(eb, src_copy, src_ptr, item_size); @@ -665,6 +671,9 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, btrfs_dir_item_key_to_cpu(leaf, di, &location); name_len = btrfs_dir_name_len(leaf, di); name = kmalloc(name_len, GFP_NOFS); + if (!name) + return -ENOMEM; + read_extent_buffer(leaf, name, (unsigned long)(di + 1), name_len); btrfs_release_path(root, path); @@ -744,6 +753,9 @@ static noinline int backref_in_log(struct btrfs_root *log, int match = 0; path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + ret = btrfs_search_slot(NULL, log, key, path, 0, 0); if (ret != 0) goto out; @@ -967,6 +979,8 @@ static noinline int fixup_inode_link_count(struct btrfs_trans_handle *trans, key.offset = (u64)-1; path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; while (1) { ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); @@ -1178,6 +1192,9 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, name_len = btrfs_dir_name_len(eb, di); name = kmalloc(name_len, GFP_NOFS); + if (!name) + return -ENOMEM; + log_type = btrfs_dir_type(eb, di); read_extent_buffer(eb, name, (unsigned long)(di + 1), name_len); @@ -1692,6 +1709,8 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans, root_owner = btrfs_header_owner(parent); next = btrfs_find_create_tree_block(root, bytenr, blocksize); + if (!next) + return -ENOMEM; if (*level == 1) { wc->process_func(root, next, wc, ptr_gen); @@ -2032,6 +2051,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, wait_log_commit(trans, log_root_tree, log_root_tree->log_transid); mutex_unlock(&log_root_tree->log_mutex); + ret = 0; goto out; } atomic_set(&log_root_tree->log_commit[index2], 1); @@ -2096,7 +2116,7 @@ out: smp_mb(); if (waitqueue_active(&root->log_commit_wait[index1])) wake_up(&root->log_commit_wait[index1]); - return 0; + return ret; } static void free_log_tree(struct btrfs_trans_handle *trans, @@ -2194,6 +2214,9 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, log = root->log_root; path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + di = btrfs_lookup_dir_item(trans, log, path, dir->i_ino, name, name_len, -1); if (IS_ERR(di)) { @@ -2594,6 +2617,9 @@ static noinline int copy_items(struct btrfs_trans_handle *trans, ins_data = kmalloc(nr * sizeof(struct btrfs_key) + nr * sizeof(u32), GFP_NOFS); + if (!ins_data) + return -ENOMEM; + ins_sizes = (u32 *)ins_data; ins_keys = (struct btrfs_key *)(ins_data + nr * sizeof(u32)); @@ -2725,7 +2751,13 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans, log = root->log_root; path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; dst_path = btrfs_alloc_path(); + if (!dst_path) { + btrfs_free_path(path); + return -ENOMEM; + } min_key.objectid = inode->i_ino; min_key.type = BTRFS_INODE_ITEM_KEY; @@ -3080,6 +3112,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree) BUG_ON(!path); trans = btrfs_start_transaction(fs_info->tree_root, 0); + BUG_ON(IS_ERR(trans)); wc.trans = trans; wc.pin = 1; diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index d158530233b7..dd13eb81ee40 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1213,6 +1213,10 @@ static int btrfs_rm_dev_item(struct btrfs_root *root, return -ENOMEM; trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) { + btrfs_free_path(path); + return PTR_ERR(trans); + } key.objectid = BTRFS_DEV_ITEMS_OBJECTID; key.type = BTRFS_DEV_ITEM_KEY; key.offset = device->devid; @@ -1334,11 +1338,11 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) ret = btrfs_shrink_device(device, 0); if (ret) - goto error_brelse; + goto error_undo; ret = btrfs_rm_dev_item(root->fs_info->chunk_root, device); if (ret) - goto error_brelse; + goto error_undo; device->in_fs_metadata = 0; @@ -1412,6 +1416,13 @@ out: mutex_unlock(&root->fs_info->volume_mutex); mutex_unlock(&uuid_mutex); return ret; +error_undo: + if (device->writeable) { + list_add(&device->dev_alloc_list, + &root->fs_info->fs_devices->alloc_list); + root->fs_info->fs_devices->rw_devices++; + } + goto error_brelse; } /* @@ -1601,11 +1612,19 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) ret = find_next_devid(root, &device->devid); if (ret) { + kfree(device->name); kfree(device); goto error; } trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) { + kfree(device->name); + kfree(device); + ret = PTR_ERR(trans); + goto error; + } + lock_chunks(root); device->writeable = 1; @@ -1621,7 +1640,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) device->dev_root = root->fs_info->dev_root; device->bdev = bdev; device->in_fs_metadata = 1; - device->mode = 0; + device->mode = FMODE_EXCL; set_blocksize(device->bdev, 4096); if (seeding_dev) { @@ -1873,7 +1892,7 @@ static int btrfs_relocate_chunk(struct btrfs_root *root, return ret; trans = btrfs_start_transaction(root, 0); - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); lock_chunks(root); @@ -2047,7 +2066,7 @@ int btrfs_balance(struct btrfs_root *dev_root) BUG_ON(ret); trans = btrfs_start_transaction(dev_root, 0); - BUG_ON(!trans); + BUG_ON(IS_ERR(trans)); ret = btrfs_grow_device(trans, device, old_size); BUG_ON(ret); @@ -2213,6 +2232,11 @@ again: /* Shrinking succeeded, else we would be at "done". */ trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto done; + } + lock_chunks(root); device->disk_total_bytes = new_size; diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 0bc68de8edd7..f0aef787a102 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -60,6 +60,7 @@ int ceph_init_dentry(struct dentry *dentry) } di->dentry = dentry; di->lease_session = NULL; + di->parent_inode = igrab(dentry->d_parent->d_inode); dentry->d_fsdata = di; dentry->d_time = jiffies; ceph_dentry_lru_add(dentry); @@ -1033,7 +1034,7 @@ static void ceph_dentry_release(struct dentry *dentry) u64 snapid = CEPH_NOSNAP; if (!IS_ROOT(dentry)) { - parent_inode = dentry->d_parent->d_inode; + parent_inode = di->parent_inode; if (parent_inode) snapid = ceph_snap(parent_inode); } @@ -1058,6 +1059,8 @@ static void ceph_dentry_release(struct dentry *dentry) kmem_cache_free(ceph_dentry_cachep, di); dentry->d_fsdata = NULL; } + if (parent_inode) + iput(parent_inode); } static int ceph_snapdir_d_revalidate(struct dentry *dentry, diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index 39c243acd062..f40b9139e437 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -584,10 +584,14 @@ static void queue_realm_cap_snaps(struct ceph_snap_realm *realm) if (lastinode) iput(lastinode); - dout("queue_realm_cap_snaps %p %llx children\n", realm, realm->ino); - list_for_each_entry(child, &realm->children, child_item) - queue_realm_cap_snaps(child); + list_for_each_entry(child, &realm->children, child_item) { + dout("queue_realm_cap_snaps %p %llx queue child %p %llx\n", + realm, realm->ino, child, child->ino); + list_del_init(&child->dirty_item); + list_add(&child->dirty_item, &realm->dirty_item); + } + list_del_init(&realm->dirty_item); dout("queue_realm_cap_snaps %p %llx done\n", realm, realm->ino); } @@ -683,7 +687,9 @@ more: * queue cap snaps _after_ we've built the new snap contexts, * so that i_head_snapc can be set appropriately. */ - list_for_each_entry(realm, &dirty_realms, dirty_item) { + while (!list_empty(&dirty_realms)) { + realm = list_first_entry(&dirty_realms, struct ceph_snap_realm, + dirty_item); queue_realm_cap_snaps(realm); } diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 20b907d76ae2..88fcaa21b801 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -207,6 +207,7 @@ struct ceph_dentry_info { struct dentry *dentry; u64 time; u64 offset; + struct inode *parent_inode; }; struct ceph_inode_xattrs_info { diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 1e7636b145a8..beeebf194234 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -372,6 +372,10 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, ppace = kmalloc(num_aces * sizeof(struct cifs_ace *), GFP_KERNEL); + if (!ppace) { + cERROR(1, "DACL memory allocation error"); + return; + } for (i = 0; i < num_aces; ++i) { ppace[i] = (struct cifs_ace *) (acl_base + acl_size); diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 4a3330235d55..a9371b6578c0 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -127,5 +127,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg); extern const struct export_operations cifs_export_ops; #endif /* EXPERIMENTAL */ -#define CIFS_VERSION "1.70" +#define CIFS_VERSION "1.71" #endif /* _CIFSFS_H */ diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index edd5b29b53c9..17afb0fbcaed 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -188,6 +188,8 @@ struct TCP_Server_Info { /* multiplexed reads or writes */ unsigned int maxBuf; /* maxBuf specifies the maximum */ /* message size the server can send or receive for non-raw SMBs */ + /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ + /* when socket is setup (and during reconnect) before NegProt sent */ unsigned int max_rw; /* maxRw specifies the maximum */ /* message size the server can send or receive for */ /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ @@ -652,7 +654,7 @@ static inline void free_dfs_info_array(struct dfs_info3_param *param, #define MID_REQUEST_SUBMITTED 2 #define MID_RESPONSE_RECEIVED 4 #define MID_RETRY_NEEDED 8 /* session closed while this request out */ -#define MID_NO_RESP_NEEDED 0x10 +#define MID_RESPONSE_MALFORMED 0x10 /* Types of response buffer returned from SendReceive2 */ #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 46c66ed01af4..904aa47e3515 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -136,9 +136,6 @@ cifs_reconnect_tcon(struct cifsTconInfo *tcon, int smb_command) } } - if (ses->status == CifsExiting) - return -EIO; - /* * Give demultiplex thread up to 10 seconds to reconnect, should be * greater than cifs socket timeout which is 7 seconds @@ -156,7 +153,7 @@ cifs_reconnect_tcon(struct cifsTconInfo *tcon, int smb_command) * retrying until process is killed or server comes * back on-line */ - if (!tcon->retry || ses->status == CifsExiting) { + if (!tcon->retry) { cFYI(1, "gave up waiting on reconnect in smb_init"); return -EHOSTDOWN; } diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 47d8ff623683..8d6c17ab593d 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -337,8 +337,13 @@ cifs_echo_request(struct work_struct *work) struct TCP_Server_Info *server = container_of(work, struct TCP_Server_Info, echo.work); - /* no need to ping if we got a response recently */ - if (time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) + /* + * We cannot send an echo until the NEGOTIATE_PROTOCOL request is + * done, which is indicated by maxBuf != 0. Also, no need to ping if + * we got a response recently + */ + if (server->maxBuf == 0 || + time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) goto requeue_echo; rc = CIFSSMBEcho(server); @@ -578,14 +583,23 @@ incomplete_rcv: else if (reconnect == 1) continue; - length += 4; /* account for rfc1002 hdr */ + total_read += 4; /* account for rfc1002 hdr */ + dump_smb(smb_buffer, total_read); - dump_smb(smb_buffer, length); - if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) { - cifs_dump_mem("Bad SMB: ", smb_buffer, 48); - continue; - } + /* + * We know that we received enough to get to the MID as we + * checked the pdu_length earlier. Now check to see + * if the rest of the header is OK. We borrow the length + * var for the rest of the loop to avoid a new stack var. + * + * 48 bytes is enough to display the header and a little bit + * into the payload for debugging purposes. + */ + length = checkSMB(smb_buffer, smb_buffer->Mid, total_read); + if (length != 0) + cifs_dump_mem("Bad SMB: ", smb_buffer, + min_t(unsigned int, total_read, 48)); mid_entry = NULL; server->lstrp = jiffies; @@ -597,7 +611,8 @@ incomplete_rcv: if ((mid_entry->mid == smb_buffer->Mid) && (mid_entry->midState == MID_REQUEST_SUBMITTED) && (mid_entry->command == smb_buffer->Command)) { - if (check2ndT2(smb_buffer,server->maxBuf) > 0) { + if (length == 0 && + check2ndT2(smb_buffer, server->maxBuf) > 0) { /* We have a multipart transact2 resp */ isMultiRsp = true; if (mid_entry->resp_buf) { @@ -632,12 +647,17 @@ incomplete_rcv: mid_entry->resp_buf = smb_buffer; mid_entry->largeBuf = isLargeBuf; multi_t2_fnd: - mid_entry->midState = MID_RESPONSE_RECEIVED; - list_del_init(&mid_entry->qhead); - mid_entry->callback(mid_entry); + if (length == 0) + mid_entry->midState = + MID_RESPONSE_RECEIVED; + else + mid_entry->midState = + MID_RESPONSE_MALFORMED; #ifdef CONFIG_CIFS_STATS2 mid_entry->when_received = jiffies; #endif + list_del_init(&mid_entry->qhead); + mid_entry->callback(mid_entry); break; } mid_entry = NULL; @@ -653,6 +673,9 @@ multi_t2_fnd: else smallbuf = NULL; } + } else if (length != 0) { + /* response sanity checks failed */ + continue; } else if (!is_valid_oplock_break(smb_buffer, server) && !isMultiRsp) { cERROR(1, "No task to wake, unknown frame received! " diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 74c0a282d012..e964b1cd5dd0 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1662,10 +1662,10 @@ static ssize_t cifs_iovec_write(struct file *file, const struct iovec *iov, unsigned long nr_segs, loff_t *poffset) { - size_t total_written = 0; - unsigned int written = 0; - unsigned long num_pages, npages; - size_t copied, len, cur_len, i; + unsigned int written; + unsigned long num_pages, npages, i; + size_t copied, len, cur_len; + ssize_t total_written = 0; struct kvec *to_send; struct page **pages; struct iov_iter it; @@ -1821,7 +1821,8 @@ cifs_iovec_read(struct file *file, const struct iovec *iov, { int rc; int xid; - unsigned int total_read, bytes_read = 0; + ssize_t total_read; + unsigned int bytes_read = 0; size_t len, cur_len; int iov_offset = 0; struct cifs_sb_info *cifs_sb; diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c index 8d9189f64477..79f641eeda30 100644 --- a/fs/cifs/netmisc.c +++ b/fs/cifs/netmisc.c @@ -170,7 +170,7 @@ cifs_convert_address(struct sockaddr *dst, const char *src, int len) { int rc, alen, slen; const char *pct; - char *endp, scope_id[13]; + char scope_id[13]; struct sockaddr_in *s4 = (struct sockaddr_in *) dst; struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) dst; @@ -197,9 +197,9 @@ cifs_convert_address(struct sockaddr *dst, const char *src, int len) memcpy(scope_id, pct + 1, slen); scope_id[slen] = '\0'; - s6->sin6_scope_id = (u32) simple_strtoul(pct, &endp, 0); - if (endp != scope_id + slen) - return 0; + rc = strict_strtoul(scope_id, 0, + (unsigned long *)&s6->sin6_scope_id); + rc = (rc == 0) ? 1 : 0; } return rc; diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 1adc9625a344..16765703131b 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -656,13 +656,13 @@ ssetup_ntlmssp_authenticate: if (type == LANMAN) { #ifdef CONFIG_CIFS_WEAK_PW_HASH - char lnm_session_key[CIFS_SESS_KEY_SIZE]; + char lnm_session_key[CIFS_AUTH_RESP_SIZE]; pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; /* no capabilities flags in old lanman negotiation */ - pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); + pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); /* Calculate hash with password and copy into bcc_ptr. * Encryption Key (stored as in cryptkey) gets used if the @@ -675,8 +675,8 @@ ssetup_ntlmssp_authenticate: true : false, lnm_session_key); ses->flags |= CIFS_SES_LANMAN; - memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE); - bcc_ptr += CIFS_SESS_KEY_SIZE; + memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE); + bcc_ptr += CIFS_AUTH_RESP_SIZE; /* can not sign if LANMAN negotiated so no need to calculate signing key? but what if server diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index b8c5e2eb43d0..46d8756f2b24 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -359,6 +359,10 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_hdr *in_buf, if (rc) return rc; + /* enable signing if server requires it */ + if (server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) + in_buf->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; + mutex_lock(&server->srv_mutex); mid = AllocMidQEntry(in_buf, server); if (mid == NULL) { @@ -453,6 +457,9 @@ sync_mid_result(struct mid_q_entry *mid, struct TCP_Server_Info *server) case MID_RETRY_NEEDED: rc = -EAGAIN; break; + case MID_RESPONSE_MALFORMED: + rc = -EIO; + break; default: cERROR(1, "%s: invalid mid state mid=%d state=%d", __func__, mid->mid, mid->midState); diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index 9c64ae9e4c1a..2d8c87b951c2 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -1468,15 +1468,13 @@ static void work_stop(void) static int work_start(void) { - recv_workqueue = alloc_workqueue("dlm_recv", WQ_MEM_RECLAIM | - WQ_HIGHPRI | WQ_FREEZEABLE, 0); + recv_workqueue = create_singlethread_workqueue("dlm_recv"); if (!recv_workqueue) { log_print("can't start dlm_recv"); return -ENOMEM; } - send_workqueue = alloc_workqueue("dlm_send", WQ_MEM_RECLAIM | - WQ_HIGHPRI | WQ_FREEZEABLE, 0); + send_workqueue = create_singlethread_workqueue("dlm_send"); if (!send_workqueue) { log_print("can't start dlm_send"); destroy_workqueue(recv_workqueue); diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c index 6fc4f319b550..534c1d46e69e 100644 --- a/fs/ecryptfs/dentry.c +++ b/fs/ecryptfs/dentry.c @@ -46,24 +46,28 @@ static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd) { struct dentry *lower_dentry; struct vfsmount *lower_mnt; - struct dentry *dentry_save; - struct vfsmount *vfsmount_save; + struct dentry *dentry_save = NULL; + struct vfsmount *vfsmount_save = NULL; int rc = 1; - if (nd->flags & LOOKUP_RCU) + if (nd && nd->flags & LOOKUP_RCU) return -ECHILD; lower_dentry = ecryptfs_dentry_to_lower(dentry); lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate) goto out; - dentry_save = nd->path.dentry; - vfsmount_save = nd->path.mnt; - nd->path.dentry = lower_dentry; - nd->path.mnt = lower_mnt; + if (nd) { + dentry_save = nd->path.dentry; + vfsmount_save = nd->path.mnt; + nd->path.dentry = lower_dentry; + nd->path.mnt = lower_mnt; + } rc = lower_dentry->d_op->d_revalidate(lower_dentry, nd); - nd->path.dentry = dentry_save; - nd->path.mnt = vfsmount_save; + if (nd) { + nd->path.dentry = dentry_save; + nd->path.mnt = vfsmount_save; + } if (dentry->d_inode) { struct inode *lower_inode = ecryptfs_inode_to_lower(dentry->d_inode); diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index dbc84ed96336..e00753496e3e 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -632,8 +632,7 @@ int ecryptfs_interpose(struct dentry *hidden_dentry, u32 flags); int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry, struct dentry *lower_dentry, - struct inode *ecryptfs_dir_inode, - struct nameidata *ecryptfs_nd); + struct inode *ecryptfs_dir_inode); int ecryptfs_decode_and_decrypt_filename(char **decrypted_name, size_t *decrypted_name_size, struct dentry *ecryptfs_dentry, diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c index 81e10e6a9443..7d1050e254f9 100644 --- a/fs/ecryptfs/file.c +++ b/fs/ecryptfs/file.c @@ -317,6 +317,7 @@ ecryptfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) const struct file_operations ecryptfs_dir_fops = { .readdir = ecryptfs_readdir, + .read = generic_read_dir, .unlocked_ioctl = ecryptfs_unlocked_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = ecryptfs_compat_ioctl, diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index bd33f87a1907..b592938a84bc 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -74,16 +74,20 @@ ecryptfs_create_underlying_file(struct inode *lower_dir_inode, unsigned int flags_save; int rc; - dentry_save = nd->path.dentry; - vfsmount_save = nd->path.mnt; - flags_save = nd->flags; - nd->path.dentry = lower_dentry; - nd->path.mnt = lower_mnt; - nd->flags &= ~LOOKUP_OPEN; + if (nd) { + dentry_save = nd->path.dentry; + vfsmount_save = nd->path.mnt; + flags_save = nd->flags; + nd->path.dentry = lower_dentry; + nd->path.mnt = lower_mnt; + nd->flags &= ~LOOKUP_OPEN; + } rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd); - nd->path.dentry = dentry_save; - nd->path.mnt = vfsmount_save; - nd->flags = flags_save; + if (nd) { + nd->path.dentry = dentry_save; + nd->path.mnt = vfsmount_save; + nd->flags = flags_save; + } return rc; } @@ -241,8 +245,7 @@ out: */ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry, struct dentry *lower_dentry, - struct inode *ecryptfs_dir_inode, - struct nameidata *ecryptfs_nd) + struct inode *ecryptfs_dir_inode) { struct dentry *lower_dir_dentry; struct vfsmount *lower_mnt; @@ -290,8 +293,6 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry, goto out; if (special_file(lower_inode->i_mode)) goto out; - if (!ecryptfs_nd) - goto out; /* Released in this function */ page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2, GFP_USER); if (!page_virt) { @@ -349,75 +350,6 @@ out: } /** - * ecryptfs_new_lower_dentry - * @name: The name of the new dentry. - * @lower_dir_dentry: Parent directory of the new dentry. - * @nd: nameidata from last lookup. - * - * Create a new dentry or get it from lower parent dir. - */ -static struct dentry * -ecryptfs_new_lower_dentry(struct qstr *name, struct dentry *lower_dir_dentry, - struct nameidata *nd) -{ - struct dentry *new_dentry; - struct dentry *tmp; - struct inode *lower_dir_inode; - - lower_dir_inode = lower_dir_dentry->d_inode; - - tmp = d_alloc(lower_dir_dentry, name); - if (!tmp) - return ERR_PTR(-ENOMEM); - - mutex_lock(&lower_dir_inode->i_mutex); - new_dentry = lower_dir_inode->i_op->lookup(lower_dir_inode, tmp, nd); - mutex_unlock(&lower_dir_inode->i_mutex); - - if (!new_dentry) - new_dentry = tmp; - else - dput(tmp); - - return new_dentry; -} - - -/** - * ecryptfs_lookup_one_lower - * @ecryptfs_dentry: The eCryptfs dentry that we are looking up - * @lower_dir_dentry: lower parent directory - * @name: lower file name - * - * Get the lower dentry from vfs. If lower dentry does not exist yet, - * create it. - */ -static struct dentry * -ecryptfs_lookup_one_lower(struct dentry *ecryptfs_dentry, - struct dentry *lower_dir_dentry, struct qstr *name) -{ - struct nameidata nd; - struct vfsmount *lower_mnt; - int err; - - lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt( - ecryptfs_dentry->d_parent)); - err = vfs_path_lookup(lower_dir_dentry, lower_mnt, name->name , 0, &nd); - mntput(lower_mnt); - - if (!err) { - /* we dont need the mount */ - mntput(nd.path.mnt); - return nd.path.dentry; - } - if (err != -ENOENT) - return ERR_PTR(err); - - /* create a new lower dentry */ - return ecryptfs_new_lower_dentry(name, lower_dir_dentry, &nd); -} - -/** * ecryptfs_lookup * @ecryptfs_dir_inode: The eCryptfs directory inode * @ecryptfs_dentry: The eCryptfs dentry that we are looking up @@ -434,7 +366,6 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, size_t encrypted_and_encoded_name_size; struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL; struct dentry *lower_dir_dentry, *lower_dentry; - struct qstr lower_name; int rc = 0; if ((ecryptfs_dentry->d_name.len == 1 @@ -444,20 +375,14 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, goto out_d_drop; } lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent); - lower_name.name = ecryptfs_dentry->d_name.name; - lower_name.len = ecryptfs_dentry->d_name.len; - lower_name.hash = ecryptfs_dentry->d_name.hash; - if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) { - rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry, - lower_dir_dentry->d_inode, &lower_name); - if (rc < 0) - goto out_d_drop; - } - lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry, - lower_dir_dentry, &lower_name); + mutex_lock(&lower_dir_dentry->d_inode->i_mutex); + lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name, + lower_dir_dentry, + ecryptfs_dentry->d_name.len); + mutex_unlock(&lower_dir_dentry->d_inode->i_mutex); if (IS_ERR(lower_dentry)) { rc = PTR_ERR(lower_dentry); - ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned " + ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned " "[%d] on lower_dentry = [%s]\n", __func__, rc, encrypted_and_encoded_name); goto out_d_drop; @@ -479,28 +404,21 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, "filename; rc = [%d]\n", __func__, rc); goto out_d_drop; } - lower_name.name = encrypted_and_encoded_name; - lower_name.len = encrypted_and_encoded_name_size; - lower_name.hash = full_name_hash(lower_name.name, lower_name.len); - if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) { - rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry, - lower_dir_dentry->d_inode, &lower_name); - if (rc < 0) - goto out_d_drop; - } - lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry, - lower_dir_dentry, &lower_name); + mutex_lock(&lower_dir_dentry->d_inode->i_mutex); + lower_dentry = lookup_one_len(encrypted_and_encoded_name, + lower_dir_dentry, + encrypted_and_encoded_name_size); + mutex_unlock(&lower_dir_dentry->d_inode->i_mutex); if (IS_ERR(lower_dentry)) { rc = PTR_ERR(lower_dentry); - ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned " + ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned " "[%d] on lower_dentry = [%s]\n", __func__, rc, encrypted_and_encoded_name); goto out_d_drop; } lookup_and_interpose: rc = ecryptfs_lookup_and_interpose_lower(ecryptfs_dentry, lower_dentry, - ecryptfs_dir_inode, - ecryptfs_nd); + ecryptfs_dir_inode); goto out; out_d_drop: d_drop(ecryptfs_dentry); @@ -1092,6 +1010,8 @@ int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry, rc = vfs_getattr(ecryptfs_dentry_to_lower_mnt(dentry), ecryptfs_dentry_to_lower(dentry), &lower_stat); if (!rc) { + fsstack_copy_attr_all(dentry->d_inode, + ecryptfs_inode_to_lower(dentry->d_inode)); generic_fillattr(dentry->d_inode, stat); stat->blocks = lower_stat.blocks; } diff --git a/fs/eventfd.c b/fs/eventfd.c index e0194b3e14d6..d9a591773919 100644 --- a/fs/eventfd.c +++ b/fs/eventfd.c @@ -99,7 +99,7 @@ EXPORT_SYMBOL_GPL(eventfd_ctx_get); * @ctx: [in] Pointer to eventfd context. * * The eventfd context reference must have been previously acquired either - * with eventfd_ctx_get() or eventfd_ctx_fdget()). + * with eventfd_ctx_get() or eventfd_ctx_fdget(). */ void eventfd_ctx_put(struct eventfd_ctx *ctx) { @@ -146,9 +146,9 @@ static void eventfd_ctx_do_read(struct eventfd_ctx *ctx, __u64 *cnt) * eventfd_ctx_remove_wait_queue - Read the current counter and removes wait queue. * @ctx: [in] Pointer to eventfd context. * @wait: [in] Wait queue to be removed. - * @cnt: [out] Pointer to the 64bit conter value. + * @cnt: [out] Pointer to the 64-bit counter value. * - * Returns zero if successful, or the following error codes: + * Returns %0 if successful, or the following error codes: * * -EAGAIN : The operation would have blocked. * @@ -175,11 +175,11 @@ EXPORT_SYMBOL_GPL(eventfd_ctx_remove_wait_queue); * eventfd_ctx_read - Reads the eventfd counter or wait if it is zero. * @ctx: [in] Pointer to eventfd context. * @no_wait: [in] Different from zero if the operation should not block. - * @cnt: [out] Pointer to the 64bit conter value. + * @cnt: [out] Pointer to the 64-bit counter value. * - * Returns zero if successful, or the following error codes: + * Returns %0 if successful, or the following error codes: * - * -EAGAIN : The operation would have blocked but @no_wait was nonzero. + * -EAGAIN : The operation would have blocked but @no_wait was non-zero. * -ERESTARTSYS : A signal interrupted the wait operation. * * If @no_wait is zero, the function might sleep until the eventfd internal diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 267d0ada4541..4a09af9e9a63 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -63,6 +63,13 @@ * cleanup path and it is also acquired by eventpoll_release_file() * if a file has been pushed inside an epoll set and it is then * close()d without a previous call toepoll_ctl(EPOLL_CTL_DEL). + * It is also acquired when inserting an epoll fd onto another epoll + * fd. We do this so that we walk the epoll tree and ensure that this + * insertion does not create a cycle of epoll file descriptors, which + * could lead to deadlock. We need a global mutex to prevent two + * simultaneous inserts (A into B and B into A) from racing and + * constructing a cycle without either insert observing that it is + * going to. * It is possible to drop the "ep->mtx" and to use the global * mutex "epmutex" (together with "ep->lock") to have it working, * but having "ep->mtx" will make the interface more scalable. @@ -224,6 +231,9 @@ static long max_user_watches __read_mostly; */ static DEFINE_MUTEX(epmutex); +/* Used to check for epoll file descriptor inclusion loops */ +static struct nested_calls poll_loop_ncalls; + /* Used for safe wake up implementation */ static struct nested_calls poll_safewake_ncalls; @@ -1198,6 +1208,62 @@ retry: return res; } +/** + * ep_loop_check_proc - Callback function to be passed to the @ep_call_nested() + * API, to verify that adding an epoll file inside another + * epoll structure, does not violate the constraints, in + * terms of closed loops, or too deep chains (which can + * result in excessive stack usage). + * + * @priv: Pointer to the epoll file to be currently checked. + * @cookie: Original cookie for this call. This is the top-of-the-chain epoll + * data structure pointer. + * @call_nests: Current dept of the @ep_call_nested() call stack. + * + * Returns: Returns zero if adding the epoll @file inside current epoll + * structure @ep does not violate the constraints, or -1 otherwise. + */ +static int ep_loop_check_proc(void *priv, void *cookie, int call_nests) +{ + int error = 0; + struct file *file = priv; + struct eventpoll *ep = file->private_data; + struct rb_node *rbp; + struct epitem *epi; + + mutex_lock(&ep->mtx); + for (rbp = rb_first(&ep->rbr); rbp; rbp = rb_next(rbp)) { + epi = rb_entry(rbp, struct epitem, rbn); + if (unlikely(is_file_epoll(epi->ffd.file))) { + error = ep_call_nested(&poll_loop_ncalls, EP_MAX_NESTS, + ep_loop_check_proc, epi->ffd.file, + epi->ffd.file->private_data, current); + if (error != 0) + break; + } + } + mutex_unlock(&ep->mtx); + + return error; +} + +/** + * ep_loop_check - Performs a check to verify that adding an epoll file (@file) + * another epoll file (represented by @ep) does not create + * closed loops or too deep chains. + * + * @ep: Pointer to the epoll private data structure. + * @file: Pointer to the epoll file to be checked. + * + * Returns: Returns zero if adding the epoll @file inside current epoll + * structure @ep does not violate the constraints, or -1 otherwise. + */ +static int ep_loop_check(struct eventpoll *ep, struct file *file) +{ + return ep_call_nested(&poll_loop_ncalls, EP_MAX_NESTS, + ep_loop_check_proc, file, ep, current); +} + /* * Open an eventpoll file descriptor. */ @@ -1246,6 +1312,7 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, struct epoll_event __user *, event) { int error; + int did_lock_epmutex = 0; struct file *file, *tfile; struct eventpoll *ep; struct epitem *epi; @@ -1287,6 +1354,25 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, */ ep = file->private_data; + /* + * When we insert an epoll file descriptor, inside another epoll file + * descriptor, there is the change of creating closed loops, which are + * better be handled here, than in more critical paths. + * + * We hold epmutex across the loop check and the insert in this case, in + * order to prevent two separate inserts from racing and each doing the + * insert "at the same time" such that ep_loop_check passes on both + * before either one does the insert, thereby creating a cycle. + */ + if (unlikely(is_file_epoll(tfile) && op == EPOLL_CTL_ADD)) { + mutex_lock(&epmutex); + did_lock_epmutex = 1; + error = -ELOOP; + if (ep_loop_check(ep, tfile) != 0) + goto error_tgt_fput; + } + + mutex_lock(&ep->mtx); /* @@ -1322,6 +1408,9 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, mutex_unlock(&ep->mtx); error_tgt_fput: + if (unlikely(did_lock_epmutex)) + mutex_unlock(&epmutex); + fput(tfile); error_fput: fput(file); @@ -1441,6 +1530,12 @@ static int __init eventpoll_init(void) EP_ITEM_COST; BUG_ON(max_user_watches < 0); + /* + * Initialize the structure used to perform epoll file descriptor + * inclusion loops checks. + */ + ep_nested_calls_init(&poll_loop_ncalls); + /* Initialize the structure used to perform safe poll wait head wake ups */ ep_nested_calls_init(&poll_safewake_ncalls); diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 0c8d97b56f34..3aa0b72b3b94 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -848,6 +848,7 @@ struct ext4_inode_info { atomic_t i_ioend_count; /* Number of outstanding io_end structs */ /* current io_end structure for async DIO write*/ ext4_io_end_t *cur_aio_dio; + atomic_t i_aiodio_unwritten; /* Nr. of inflight conversions pending */ spinlock_t i_block_reservation_lock; @@ -2119,6 +2120,15 @@ static inline void set_bitmap_uptodate(struct buffer_head *bh) #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) +/* For ioend & aio unwritten conversion wait queues */ +#define EXT4_WQ_HASH_SZ 37 +#define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ + EXT4_WQ_HASH_SZ]) +#define ext4_aio_mutex(v) (&ext4__aio_mutex[((unsigned long)(v)) %\ + EXT4_WQ_HASH_SZ]) +extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; +extern struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; + #endif /* __KERNEL__ */ #endif /* _EXT4_H */ diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 63a75810b7c3..ccce8a7e94ed 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3174,9 +3174,10 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode, * that this IO needs to convertion to written when IO is * completed */ - if (io) + if (io && !(io->flag & EXT4_IO_END_UNWRITTEN)) { io->flag = EXT4_IO_END_UNWRITTEN; - else + atomic_inc(&EXT4_I(inode)->i_aiodio_unwritten); + } else ext4_set_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); if (ext4_should_dioread_nolock(inode)) map->m_flags |= EXT4_MAP_UNINIT; @@ -3463,9 +3464,10 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, * that we need to perform convertion when IO is done. */ if ((flags & EXT4_GET_BLOCKS_PRE_IO)) { - if (io) + if (io && !(io->flag & EXT4_IO_END_UNWRITTEN)) { io->flag = EXT4_IO_END_UNWRITTEN; - else + atomic_inc(&EXT4_I(inode)->i_aiodio_unwritten); + } else ext4_set_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); } diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 2e8322c8aa88..7b80d543b89e 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -55,11 +55,47 @@ static int ext4_release_file(struct inode *inode, struct file *filp) return 0; } +static void ext4_aiodio_wait(struct inode *inode) +{ + wait_queue_head_t *wq = ext4_ioend_wq(inode); + + wait_event(*wq, (atomic_read(&EXT4_I(inode)->i_aiodio_unwritten) == 0)); +} + +/* + * This tests whether the IO in question is block-aligned or not. + * Ext4 utilizes unwritten extents when hole-filling during direct IO, and they + * are converted to written only after the IO is complete. Until they are + * mapped, these blocks appear as holes, so dio_zero_block() will assume that + * it needs to zero out portions of the start and/or end block. If 2 AIO + * threads are at work on the same unwritten block, they must be synchronized + * or one thread will zero the other's data, causing corruption. + */ +static int +ext4_unaligned_aio(struct inode *inode, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) +{ + struct super_block *sb = inode->i_sb; + int blockmask = sb->s_blocksize - 1; + size_t count = iov_length(iov, nr_segs); + loff_t final_size = pos + count; + + if (pos >= inode->i_size) + return 0; + + if ((pos & blockmask) || (final_size & blockmask)) + return 1; + + return 0; +} + static ssize_t ext4_file_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos) { struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; + int unaligned_aio = 0; + int ret; /* * If we have encountered a bitmap-format file, the size limit @@ -78,9 +114,31 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov, nr_segs = iov_shorten((struct iovec *)iov, nr_segs, sbi->s_bitmap_maxbytes - pos); } + } else if (unlikely((iocb->ki_filp->f_flags & O_DIRECT) && + !is_sync_kiocb(iocb))) { + unaligned_aio = ext4_unaligned_aio(inode, iov, nr_segs, pos); } - return generic_file_aio_write(iocb, iov, nr_segs, pos); + /* Unaligned direct AIO must be serialized; see comment above */ + if (unaligned_aio) { + static unsigned long unaligned_warn_time; + + /* Warn about this once per day */ + if (printk_timed_ratelimit(&unaligned_warn_time, 60*60*24*HZ)) + ext4_msg(inode->i_sb, KERN_WARNING, + "Unaligned AIO/DIO on inode %ld by %s; " + "performance will be poor.", + inode->i_ino, current->comm); + mutex_lock(ext4_aio_mutex(inode)); + ext4_aiodio_wait(inode); + } + + ret = generic_file_aio_write(iocb, iov, nr_segs, pos); + + if (unaligned_aio) + mutex_unlock(ext4_aio_mutex(inode)); + + return ret; } static const struct vm_operations_struct ext4_file_vm_ops = { diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 851f49b2f9d2..d1fe09aea73d 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -342,10 +342,15 @@ static struct kmem_cache *ext4_free_ext_cachep; /* We create slab caches for groupinfo data structures based on the * superblock block size. There will be one per mounted filesystem for * each unique s_blocksize_bits */ -#define NR_GRPINFO_CACHES \ - (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE + 1) +#define NR_GRPINFO_CACHES 8 static struct kmem_cache *ext4_groupinfo_caches[NR_GRPINFO_CACHES]; +static const char *ext4_groupinfo_slab_names[NR_GRPINFO_CACHES] = { + "ext4_groupinfo_1k", "ext4_groupinfo_2k", "ext4_groupinfo_4k", + "ext4_groupinfo_8k", "ext4_groupinfo_16k", "ext4_groupinfo_32k", + "ext4_groupinfo_64k", "ext4_groupinfo_128k" +}; + static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap, ext4_group_t group); static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap, @@ -2414,6 +2419,55 @@ err_freesgi: return -ENOMEM; } +static void ext4_groupinfo_destroy_slabs(void) +{ + int i; + + for (i = 0; i < NR_GRPINFO_CACHES; i++) { + if (ext4_groupinfo_caches[i]) + kmem_cache_destroy(ext4_groupinfo_caches[i]); + ext4_groupinfo_caches[i] = NULL; + } +} + +static int ext4_groupinfo_create_slab(size_t size) +{ + static DEFINE_MUTEX(ext4_grpinfo_slab_create_mutex); + int slab_size; + int blocksize_bits = order_base_2(size); + int cache_index = blocksize_bits - EXT4_MIN_BLOCK_LOG_SIZE; + struct kmem_cache *cachep; + + if (cache_index >= NR_GRPINFO_CACHES) + return -EINVAL; + + if (unlikely(cache_index < 0)) + cache_index = 0; + + mutex_lock(&ext4_grpinfo_slab_create_mutex); + if (ext4_groupinfo_caches[cache_index]) { + mutex_unlock(&ext4_grpinfo_slab_create_mutex); + return 0; /* Already created */ + } + + slab_size = offsetof(struct ext4_group_info, + bb_counters[blocksize_bits + 2]); + + cachep = kmem_cache_create(ext4_groupinfo_slab_names[cache_index], + slab_size, 0, SLAB_RECLAIM_ACCOUNT, + NULL); + + mutex_unlock(&ext4_grpinfo_slab_create_mutex); + if (!cachep) { + printk(KERN_EMERG "EXT4: no memory for groupinfo slab cache\n"); + return -ENOMEM; + } + + ext4_groupinfo_caches[cache_index] = cachep; + + return 0; +} + int ext4_mb_init(struct super_block *sb, int needs_recovery) { struct ext4_sb_info *sbi = EXT4_SB(sb); @@ -2421,9 +2475,6 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery) unsigned offset; unsigned max; int ret; - int cache_index; - struct kmem_cache *cachep; - char *namep = NULL; i = (sb->s_blocksize_bits + 2) * sizeof(*sbi->s_mb_offsets); @@ -2440,30 +2491,9 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery) goto out; } - cache_index = sb->s_blocksize_bits - EXT4_MIN_BLOCK_LOG_SIZE; - cachep = ext4_groupinfo_caches[cache_index]; - if (!cachep) { - char name[32]; - int len = offsetof(struct ext4_group_info, - bb_counters[sb->s_blocksize_bits + 2]); - - sprintf(name, "ext4_groupinfo_%d", sb->s_blocksize_bits); - namep = kstrdup(name, GFP_KERNEL); - if (!namep) { - ret = -ENOMEM; - goto out; - } - - /* Need to free the kmem_cache_name() when we - * destroy the slab */ - cachep = kmem_cache_create(namep, len, 0, - SLAB_RECLAIM_ACCOUNT, NULL); - if (!cachep) { - ret = -ENOMEM; - goto out; - } - ext4_groupinfo_caches[cache_index] = cachep; - } + ret = ext4_groupinfo_create_slab(sb->s_blocksize); + if (ret < 0) + goto out; /* order 0 is regular bitmap */ sbi->s_mb_maxs[0] = sb->s_blocksize << 3; @@ -2520,7 +2550,6 @@ out: if (ret) { kfree(sbi->s_mb_offsets); kfree(sbi->s_mb_maxs); - kfree(namep); } return ret; } @@ -2734,7 +2763,6 @@ int __init ext4_init_mballoc(void) void ext4_exit_mballoc(void) { - int i; /* * Wait for completion of call_rcu()'s on ext4_pspace_cachep * before destroying the slab cache. @@ -2743,15 +2771,7 @@ void ext4_exit_mballoc(void) kmem_cache_destroy(ext4_pspace_cachep); kmem_cache_destroy(ext4_ac_cachep); kmem_cache_destroy(ext4_free_ext_cachep); - - for (i = 0; i < NR_GRPINFO_CACHES; i++) { - struct kmem_cache *cachep = ext4_groupinfo_caches[i]; - if (cachep) { - char *name = (char *)kmem_cache_name(cachep); - kmem_cache_destroy(cachep); - kfree(name); - } - } + ext4_groupinfo_destroy_slabs(); ext4_remove_debugfs_entry(); } diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 7270dcfca92a..955cc309142f 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -32,14 +32,8 @@ static struct kmem_cache *io_page_cachep, *io_end_cachep; -#define WQ_HASH_SZ 37 -#define to_ioend_wq(v) (&ioend_wq[((unsigned long)v) % WQ_HASH_SZ]) -static wait_queue_head_t ioend_wq[WQ_HASH_SZ]; - int __init ext4_init_pageio(void) { - int i; - io_page_cachep = KMEM_CACHE(ext4_io_page, SLAB_RECLAIM_ACCOUNT); if (io_page_cachep == NULL) return -ENOMEM; @@ -48,9 +42,6 @@ int __init ext4_init_pageio(void) kmem_cache_destroy(io_page_cachep); return -ENOMEM; } - for (i = 0; i < WQ_HASH_SZ; i++) - init_waitqueue_head(&ioend_wq[i]); - return 0; } @@ -62,7 +53,7 @@ void ext4_exit_pageio(void) void ext4_ioend_wait(struct inode *inode) { - wait_queue_head_t *wq = to_ioend_wq(inode); + wait_queue_head_t *wq = ext4_ioend_wq(inode); wait_event(*wq, (atomic_read(&EXT4_I(inode)->i_ioend_count) == 0)); } @@ -87,7 +78,7 @@ void ext4_free_io_end(ext4_io_end_t *io) for (i = 0; i < io->num_io_pages; i++) put_io_page(io->pages[i]); io->num_io_pages = 0; - wq = to_ioend_wq(io->inode); + wq = ext4_ioend_wq(io->inode); if (atomic_dec_and_test(&EXT4_I(io->inode)->i_ioend_count) && waitqueue_active(wq)) wake_up_all(wq); @@ -102,6 +93,7 @@ int ext4_end_io_nolock(ext4_io_end_t *io) struct inode *inode = io->inode; loff_t offset = io->offset; ssize_t size = io->size; + wait_queue_head_t *wq; int ret = 0; ext4_debug("ext4_end_io_nolock: io 0x%p from inode %lu,list->next 0x%p," @@ -126,7 +118,16 @@ int ext4_end_io_nolock(ext4_io_end_t *io) if (io->iocb) aio_complete(io->iocb, io->result, 0); /* clear the DIO AIO unwritten flag */ - io->flag &= ~EXT4_IO_END_UNWRITTEN; + if (io->flag & EXT4_IO_END_UNWRITTEN) { + io->flag &= ~EXT4_IO_END_UNWRITTEN; + /* Wake up anyone waiting on unwritten extent conversion */ + wq = ext4_ioend_wq(io->inode); + if (atomic_dec_and_test(&EXT4_I(inode)->i_aiodio_unwritten) && + waitqueue_active(wq)) { + wake_up_all(wq); + } + } + return ret; } @@ -190,6 +191,7 @@ static void ext4_end_bio(struct bio *bio, int error) struct inode *inode; unsigned long flags; int i; + sector_t bi_sector = bio->bi_sector; BUG_ON(!io_end); bio->bi_private = NULL; @@ -207,9 +209,7 @@ static void ext4_end_bio(struct bio *bio, int error) if (error) SetPageError(page); BUG_ON(!head); - if (head->b_size == PAGE_CACHE_SIZE) - clear_buffer_dirty(head); - else { + if (head->b_size != PAGE_CACHE_SIZE) { loff_t offset; loff_t io_end_offset = io_end->offset + io_end->size; @@ -221,7 +221,6 @@ static void ext4_end_bio(struct bio *bio, int error) if (error) buffer_io_error(bh); - clear_buffer_dirty(bh); } if (buffer_delay(bh)) partial_write = 1; @@ -257,7 +256,7 @@ static void ext4_end_bio(struct bio *bio, int error) (unsigned long long) io_end->offset, (long) io_end->size, (unsigned long long) - bio->bi_sector >> (inode->i_blkbits - 9)); + bi_sector >> (inode->i_blkbits - 9)); } /* Add the io_end to per-inode completed io list*/ @@ -380,6 +379,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io, blocksize = 1 << inode->i_blkbits; + BUG_ON(!PageLocked(page)); BUG_ON(PageWriteback(page)); set_page_writeback(page); ClearPageError(page); @@ -397,12 +397,14 @@ int ext4_bio_write_page(struct ext4_io_submit *io, for (bh = head = page_buffers(page), block_start = 0; bh != head || !block_start; block_start = block_end, bh = bh->b_this_page) { + block_end = block_start + blocksize; if (block_start >= len) { clear_buffer_dirty(bh); set_buffer_uptodate(bh); continue; } + clear_buffer_dirty(bh); ret = io_submit_add_bh(io, io_page, inode, wbc, bh); if (ret) { /* diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 48ce561fafac..f6a318f836b2 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -77,6 +77,7 @@ static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data); static void ext4_destroy_lazyinit_thread(void); static void ext4_unregister_li_request(struct super_block *sb); +static void ext4_clear_request_list(void); #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) static struct file_system_type ext3_fs_type = { @@ -832,6 +833,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) ei->i_sync_tid = 0; ei->i_datasync_tid = 0; atomic_set(&ei->i_ioend_count, 0); + atomic_set(&ei->i_aiodio_unwritten, 0); return &ei->vfs_inode; } @@ -2716,6 +2718,8 @@ static void ext4_unregister_li_request(struct super_block *sb) mutex_unlock(&ext4_li_info->li_list_mtx); } +static struct task_struct *ext4_lazyinit_task; + /* * This is the function where ext4lazyinit thread lives. It walks * through the request list searching for next scheduled filesystem. @@ -2784,6 +2788,10 @@ cont_thread: if (time_before(jiffies, next_wakeup)) schedule(); finish_wait(&eli->li_wait_daemon, &wait); + if (kthread_should_stop()) { + ext4_clear_request_list(); + goto exit_thread; + } } exit_thread: @@ -2808,6 +2816,7 @@ exit_thread: wake_up(&eli->li_wait_task); kfree(ext4_li_info); + ext4_lazyinit_task = NULL; ext4_li_info = NULL; mutex_unlock(&ext4_li_mtx); @@ -2830,11 +2839,10 @@ static void ext4_clear_request_list(void) static int ext4_run_lazyinit_thread(void) { - struct task_struct *t; - - t = kthread_run(ext4_lazyinit_thread, ext4_li_info, "ext4lazyinit"); - if (IS_ERR(t)) { - int err = PTR_ERR(t); + ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, + ext4_li_info, "ext4lazyinit"); + if (IS_ERR(ext4_lazyinit_task)) { + int err = PTR_ERR(ext4_lazyinit_task); ext4_clear_request_list(); del_timer_sync(&ext4_li_info->li_timer); kfree(ext4_li_info); @@ -2985,16 +2993,10 @@ static void ext4_destroy_lazyinit_thread(void) * If thread exited earlier * there's nothing to be done. */ - if (!ext4_li_info) + if (!ext4_li_info || !ext4_lazyinit_task) return; - ext4_clear_request_list(); - - while (ext4_li_info->li_task) { - wake_up(&ext4_li_info->li_wait_daemon); - wait_event(ext4_li_info->li_wait_task, - ext4_li_info->li_task == NULL); - } + kthread_stop(ext4_lazyinit_task); } static int ext4_fill_super(struct super_block *sb, void *data, int silent) @@ -4768,7 +4770,7 @@ static struct file_system_type ext4_fs_type = { .fs_flags = FS_REQUIRES_DEV, }; -int __init ext4_init_feat_adverts(void) +static int __init ext4_init_feat_adverts(void) { struct ext4_features *ef; int ret = -ENOMEM; @@ -4792,23 +4794,44 @@ out: return ret; } +static void ext4_exit_feat_adverts(void) +{ + kobject_put(&ext4_feat->f_kobj); + wait_for_completion(&ext4_feat->f_kobj_unregister); + kfree(ext4_feat); +} + +/* Shared across all ext4 file systems */ +wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; +struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; + static int __init ext4_init_fs(void) { - int err; + int i, err; ext4_check_flag_values(); + + for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { + mutex_init(&ext4__aio_mutex[i]); + init_waitqueue_head(&ext4__ioend_wq[i]); + } + err = ext4_init_pageio(); if (err) return err; err = ext4_init_system_zone(); if (err) - goto out5; + goto out7; ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); if (!ext4_kset) - goto out4; + goto out6; ext4_proc_root = proc_mkdir("fs/ext4", NULL); + if (!ext4_proc_root) + goto out5; err = ext4_init_feat_adverts(); + if (err) + goto out4; err = ext4_init_mballoc(); if (err) @@ -4838,12 +4861,14 @@ out1: out2: ext4_exit_mballoc(); out3: - kfree(ext4_feat); + ext4_exit_feat_adverts(); +out4: remove_proc_entry("fs/ext4", NULL); +out5: kset_unregister(ext4_kset); -out4: +out6: ext4_exit_system_zone(); -out5: +out7: ext4_exit_pageio(); return err; } @@ -4857,6 +4882,7 @@ static void __exit ext4_exit_fs(void) destroy_inodecache(); ext4_exit_xattr(); ext4_exit_mballoc(); + ext4_exit_feat_adverts(); remove_proc_entry("fs/ext4", NULL); kset_unregister(ext4_kset); ext4_exit_system_zone(); diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index bfed8447ed80..83543b5ff941 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1283,8 +1283,11 @@ static int fuse_do_setattr(struct dentry *entry, struct iattr *attr, if (err) return err; - if ((attr->ia_valid & ATTR_OPEN) && fc->atomic_o_trunc) - return 0; + if (attr->ia_valid & ATTR_OPEN) { + if (fc->atomic_o_trunc) + return 0; + file = NULL; + } if (attr->ia_valid & ATTR_SIZE) is_truncate = true; diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 95da1bc1c826..9e0832dbb1e3 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -86,18 +86,52 @@ struct fuse_file *fuse_file_get(struct fuse_file *ff) return ff; } +static void fuse_release_async(struct work_struct *work) +{ + struct fuse_req *req; + struct fuse_conn *fc; + struct path path; + + req = container_of(work, struct fuse_req, misc.release.work); + path = req->misc.release.path; + fc = get_fuse_conn(path.dentry->d_inode); + + fuse_put_request(fc, req); + path_put(&path); +} + static void fuse_release_end(struct fuse_conn *fc, struct fuse_req *req) { - path_put(&req->misc.release.path); + if (fc->destroy_req) { + /* + * If this is a fuseblk mount, then it's possible that + * releasing the path will result in releasing the + * super block and sending the DESTROY request. If + * the server is single threaded, this would hang. + * For this reason do the path_put() in a separate + * thread. + */ + atomic_inc(&req->count); + INIT_WORK(&req->misc.release.work, fuse_release_async); + schedule_work(&req->misc.release.work); + } else { + path_put(&req->misc.release.path); + } } -static void fuse_file_put(struct fuse_file *ff) +static void fuse_file_put(struct fuse_file *ff, bool sync) { if (atomic_dec_and_test(&ff->count)) { struct fuse_req *req = ff->reserved_req; - req->end = fuse_release_end; - fuse_request_send_background(ff->fc, req); + if (sync) { + fuse_request_send(ff->fc, req); + path_put(&req->misc.release.path); + fuse_put_request(ff->fc, req); + } else { + req->end = fuse_release_end; + fuse_request_send_background(ff->fc, req); + } kfree(ff); } } @@ -219,8 +253,12 @@ void fuse_release_common(struct file *file, int opcode) * Normally this will send the RELEASE request, however if * some asynchronous READ or WRITE requests are outstanding, * the sending will be delayed. + * + * Make the release synchronous if this is a fuseblk mount, + * synchronous RELEASE is allowed (and desirable) in this case + * because the server can be trusted not to screw up. */ - fuse_file_put(ff); + fuse_file_put(ff, ff->fc->destroy_req != NULL); } static int fuse_open(struct inode *inode, struct file *file) @@ -558,7 +596,7 @@ static void fuse_readpages_end(struct fuse_conn *fc, struct fuse_req *req) page_cache_release(page); } if (req->ff) - fuse_file_put(req->ff); + fuse_file_put(req->ff, false); } static void fuse_send_readpages(struct fuse_req *req, struct file *file) @@ -1137,7 +1175,7 @@ static ssize_t fuse_direct_write(struct file *file, const char __user *buf, static void fuse_writepage_free(struct fuse_conn *fc, struct fuse_req *req) { __free_page(req->pages[0]); - fuse_file_put(req->ff); + fuse_file_put(req->ff, false); } static void fuse_writepage_finish(struct fuse_conn *fc, struct fuse_req *req) diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index ae5744a2f9e9..d4286947bc2c 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -21,6 +21,7 @@ #include <linux/rwsem.h> #include <linux/rbtree.h> #include <linux/poll.h> +#include <linux/workqueue.h> /** Max number of pages that can be used in a single read request */ #define FUSE_MAX_PAGES_PER_REQ 32 @@ -262,7 +263,10 @@ struct fuse_req { /** Data for asynchronous requests */ union { struct { - struct fuse_release_in in; + union { + struct fuse_release_in in; + struct work_struct work; + }; struct path path; } release; struct fuse_init_in init_in; diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 08a8beb152e6..7cd9a5a68d59 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -1779,11 +1779,11 @@ int __init gfs2_glock_init(void) #endif glock_workqueue = alloc_workqueue("glock_workqueue", WQ_MEM_RECLAIM | - WQ_HIGHPRI | WQ_FREEZEABLE, 0); + WQ_HIGHPRI | WQ_FREEZABLE, 0); if (IS_ERR(glock_workqueue)) return PTR_ERR(glock_workqueue); gfs2_delete_workqueue = alloc_workqueue("delete_workqueue", - WQ_MEM_RECLAIM | WQ_FREEZEABLE, + WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); if (IS_ERR(gfs2_delete_workqueue)) { destroy_workqueue(glock_workqueue); diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c index ebef7ab6e17e..72c31a315d96 100644 --- a/fs/gfs2/main.c +++ b/fs/gfs2/main.c @@ -59,14 +59,7 @@ static void gfs2_init_gl_aspace_once(void *foo) struct address_space *mapping = (struct address_space *)(gl + 1); gfs2_init_glock_once(gl); - memset(mapping, 0, sizeof(*mapping)); - INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC); - spin_lock_init(&mapping->tree_lock); - spin_lock_init(&mapping->i_mmap_lock); - INIT_LIST_HEAD(&mapping->private_list); - spin_lock_init(&mapping->private_lock); - INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap); - INIT_LIST_HEAD(&mapping->i_mmap_nonlinear); + address_space_init_once(mapping); } /** @@ -144,7 +137,7 @@ static int __init init_gfs2_fs(void) error = -ENOMEM; gfs_recovery_wq = alloc_workqueue("gfs_recovery", - WQ_MEM_RECLAIM | WQ_FREEZEABLE, 0); + WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); if (!gfs_recovery_wq) goto fail_wq; diff --git a/fs/inode.c b/fs/inode.c index da85e56378f3..0647d80accf6 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -295,6 +295,20 @@ static void destroy_inode(struct inode *inode) call_rcu(&inode->i_rcu, i_callback); } +void address_space_init_once(struct address_space *mapping) +{ + memset(mapping, 0, sizeof(*mapping)); + INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC); + spin_lock_init(&mapping->tree_lock); + spin_lock_init(&mapping->i_mmap_lock); + INIT_LIST_HEAD(&mapping->private_list); + spin_lock_init(&mapping->private_lock); + INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap); + INIT_LIST_HEAD(&mapping->i_mmap_nonlinear); + mutex_init(&mapping->unmap_mutex); +} +EXPORT_SYMBOL(address_space_init_once); + /* * These are initializations that only need to be done * once, because the fields are idempotent across use @@ -308,13 +322,7 @@ void inode_init_once(struct inode *inode) INIT_LIST_HEAD(&inode->i_devices); INIT_LIST_HEAD(&inode->i_wb_list); INIT_LIST_HEAD(&inode->i_lru); - INIT_RADIX_TREE(&inode->i_data.page_tree, GFP_ATOMIC); - spin_lock_init(&inode->i_data.tree_lock); - spin_lock_init(&inode->i_data.i_mmap_lock); - INIT_LIST_HEAD(&inode->i_data.private_list); - spin_lock_init(&inode->i_data.private_lock); - INIT_RAW_PRIO_TREE_ROOT(&inode->i_data.i_mmap); - INIT_LIST_HEAD(&inode->i_data.i_mmap_nonlinear); + address_space_init_once(&inode->i_data); i_size_ordered_init(inode); #ifdef CONFIG_FSNOTIFY INIT_HLIST_HEAD(&inode->i_fsnotify_marks); @@ -540,11 +548,14 @@ void evict_inodes(struct super_block *sb) /** * invalidate_inodes - attempt to free all inodes on a superblock * @sb: superblock to operate on + * @kill_dirty: flag to guide handling of dirty inodes * * Attempts to free all inodes for a given superblock. If there were any * busy inodes return a non-zero value, else zero. + * If @kill_dirty is set, discard dirty inodes too, otherwise treat + * them as busy. */ -int invalidate_inodes(struct super_block *sb) +int invalidate_inodes(struct super_block *sb, bool kill_dirty) { int busy = 0; struct inode *inode, *next; @@ -556,6 +567,10 @@ int invalidate_inodes(struct super_block *sb) list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) { if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE)) continue; + if (inode->i_state & I_DIRTY && !kill_dirty) { + busy = 1; + continue; + } if (atomic_read(&inode->i_count)) { busy = 1; continue; diff --git a/fs/internal.h b/fs/internal.h index 0663568b1247..9b976b57d7fe 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -112,4 +112,4 @@ extern void release_open_intent(struct nameidata *); */ extern int get_nr_dirty_inodes(void); extern void evict_inodes(struct super_block *); -extern int invalidate_inodes(struct super_block *); +extern int invalidate_inodes(struct super_block *, bool); diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 9e4686900f18..97e73469b2c4 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -473,7 +473,8 @@ int __jbd2_log_space_left(journal_t *journal) } /* - * Called under j_state_lock. Returns true if a transaction commit was started. + * Called with j_state_lock locked for writing. + * Returns true if a transaction commit was started. */ int __jbd2_log_start_commit(journal_t *journal, tid_t target) { @@ -520,11 +521,13 @@ int jbd2_journal_force_commit_nested(journal_t *journal) { transaction_t *transaction = NULL; tid_t tid; + int need_to_start = 0; read_lock(&journal->j_state_lock); if (journal->j_running_transaction && !current->journal_info) { transaction = journal->j_running_transaction; - __jbd2_log_start_commit(journal, transaction->t_tid); + if (!tid_geq(journal->j_commit_request, transaction->t_tid)) + need_to_start = 1; } else if (journal->j_committing_transaction) transaction = journal->j_committing_transaction; @@ -535,6 +538,8 @@ int jbd2_journal_force_commit_nested(journal_t *journal) tid = transaction->t_tid; read_unlock(&journal->j_state_lock); + if (need_to_start) + jbd2_log_start_commit(journal, tid); jbd2_log_wait_commit(journal, tid); return 1; } diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index faad2bd787c7..1d1191050f99 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -117,10 +117,10 @@ static inline void update_t_max_wait(transaction_t *transaction) static int start_this_handle(journal_t *journal, handle_t *handle, int gfp_mask) { - transaction_t *transaction; - int needed; - int nblocks = handle->h_buffer_credits; - transaction_t *new_transaction = NULL; + transaction_t *transaction, *new_transaction = NULL; + tid_t tid; + int needed, need_to_start; + int nblocks = handle->h_buffer_credits; if (nblocks > journal->j_max_transaction_buffers) { printk(KERN_ERR "JBD: %s wants too many credits (%d > %d)\n", @@ -222,8 +222,11 @@ repeat: atomic_sub(nblocks, &transaction->t_outstanding_credits); prepare_to_wait(&journal->j_wait_transaction_locked, &wait, TASK_UNINTERRUPTIBLE); - __jbd2_log_start_commit(journal, transaction->t_tid); + tid = transaction->t_tid; + need_to_start = !tid_geq(journal->j_commit_request, tid); read_unlock(&journal->j_state_lock); + if (need_to_start) + jbd2_log_start_commit(journal, tid); schedule(); finish_wait(&journal->j_wait_transaction_locked, &wait); goto repeat; @@ -442,7 +445,8 @@ int jbd2__journal_restart(handle_t *handle, int nblocks, int gfp_mask) { transaction_t *transaction = handle->h_transaction; journal_t *journal = transaction->t_journal; - int ret; + tid_t tid; + int need_to_start, ret; /* If we've had an abort of any type, don't even think about * actually doing the restart! */ @@ -465,8 +469,11 @@ int jbd2__journal_restart(handle_t *handle, int nblocks, int gfp_mask) spin_unlock(&transaction->t_handle_lock); jbd_debug(2, "restarting handle %p\n", handle); - __jbd2_log_start_commit(journal, transaction->t_tid); + tid = transaction->t_tid; + need_to_start = !tid_geq(journal->j_commit_request, tid); read_unlock(&journal->j_state_lock); + if (need_to_start) + jbd2_log_start_commit(journal, tid); lock_map_release(&handle->h_lockdep_map); handle->h_buffer_credits = nblocks; diff --git a/fs/namei.c b/fs/namei.c index 7d77f24d32a9..0087cf9c2c6b 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -455,14 +455,6 @@ static int nameidata_dentry_drop_rcu(struct nameidata *nd, struct dentry *dentry struct fs_struct *fs = current->fs; struct dentry *parent = nd->path.dentry; - /* - * It can be possible to revalidate the dentry that we started - * the path walk with. force_reval_path may also revalidate the - * dentry already committed to the nameidata. - */ - if (unlikely(parent == dentry)) - return nameidata_drop_rcu(nd); - BUG_ON(!(nd->flags & LOOKUP_RCU)); if (nd->root.mnt) { spin_lock(&fs->lock); @@ -561,39 +553,25 @@ static inline int nameidata_drop_rcu_last_maybe(struct nameidata *nd) */ void release_open_intent(struct nameidata *nd) { - if (nd->intent.open.file->f_path.dentry == NULL) - put_filp(nd->intent.open.file); - else - fput(nd->intent.open.file); -} - -/* - * Call d_revalidate and handle filesystems that request rcu-walk - * to be dropped. This may be called and return in rcu-walk mode, - * regardless of success or error. If -ECHILD is returned, the caller - * must return -ECHILD back up the path walk stack so path walk may - * be restarted in ref-walk mode. - */ -static int d_revalidate(struct dentry *dentry, struct nameidata *nd) -{ - int status; + struct file *file = nd->intent.open.file; - status = dentry->d_op->d_revalidate(dentry, nd); - if (status == -ECHILD) { - if (nameidata_dentry_drop_rcu(nd, dentry)) - return status; - status = dentry->d_op->d_revalidate(dentry, nd); + if (file && !IS_ERR(file)) { + if (file->f_path.dentry == NULL) + put_filp(file); + else + fput(file); } +} - return status; +static inline int d_revalidate(struct dentry *dentry, struct nameidata *nd) +{ + return dentry->d_op->d_revalidate(dentry, nd); } -static inline struct dentry * +static struct dentry * do_revalidate(struct dentry *dentry, struct nameidata *nd) { - int status; - - status = d_revalidate(dentry, nd); + int status = d_revalidate(dentry, nd); if (unlikely(status <= 0)) { /* * The dentry failed validation. @@ -602,24 +580,39 @@ do_revalidate(struct dentry *dentry, struct nameidata *nd) * to return a fail status. */ if (status < 0) { - /* If we're in rcu-walk, we don't have a ref */ - if (!(nd->flags & LOOKUP_RCU)) - dput(dentry); + dput(dentry); dentry = ERR_PTR(status); - - } else { - /* Don't d_invalidate in rcu-walk mode */ - if (nameidata_dentry_drop_rcu_maybe(nd, dentry)) - return ERR_PTR(-ECHILD); - if (!d_invalidate(dentry)) { - dput(dentry); - dentry = NULL; - } + } else if (!d_invalidate(dentry)) { + dput(dentry); + dentry = NULL; } } return dentry; } +static inline struct dentry * +do_revalidate_rcu(struct dentry *dentry, struct nameidata *nd) +{ + int status = d_revalidate(dentry, nd); + if (likely(status > 0)) + return dentry; + if (status == -ECHILD) { + if (nameidata_dentry_drop_rcu(nd, dentry)) + return ERR_PTR(-ECHILD); + return do_revalidate(dentry, nd); + } + if (status < 0) + return ERR_PTR(status); + /* Don't d_invalidate in rcu-walk mode */ + if (nameidata_dentry_drop_rcu(nd, dentry)) + return ERR_PTR(-ECHILD); + if (!d_invalidate(dentry)) { + dput(dentry); + dentry = NULL; + } + return dentry; +} + static inline int need_reval_dot(struct dentry *dentry) { if (likely(!(dentry->d_flags & DCACHE_OP_REVALIDATE))) @@ -664,9 +657,6 @@ force_reval_path(struct path *path, struct nameidata *nd) return 0; if (!status) { - /* Don't d_invalidate in rcu-walk mode */ - if (nameidata_drop_rcu(nd)) - return -ECHILD; d_invalidate(dentry); status = -ESTALE; } @@ -773,6 +763,8 @@ __do_follow_link(const struct path *link, struct nameidata *nd, void **p) int error; struct dentry *dentry = link->dentry; + BUG_ON(nd->flags & LOOKUP_RCU); + touch_atime(link->mnt, dentry); nd_set_link(nd, NULL); @@ -803,10 +795,16 @@ __do_follow_link(const struct path *link, struct nameidata *nd, void **p) * Without that kind of total limit, nasty chains of consecutive * symlinks can cause almost arbitrarily long lookups. */ -static inline int do_follow_link(struct path *path, struct nameidata *nd) +static inline int do_follow_link(struct inode *inode, struct path *path, struct nameidata *nd) { void *cookie; int err = -ELOOP; + + /* We drop rcu-walk here */ + if (nameidata_dentry_drop_rcu_maybe(nd, path->dentry)) + return -ECHILD; + BUG_ON(inode != path->dentry->d_inode); + if (current->link_count >= MAX_NESTED_LINKS) goto loop; if (current->total_link_count >= 40) @@ -1251,9 +1249,15 @@ static int do_lookup(struct nameidata *nd, struct qstr *name, return -ECHILD; nd->seq = seq; - if (dentry->d_flags & DCACHE_OP_REVALIDATE) - goto need_revalidate; -done2: + if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) { + dentry = do_revalidate_rcu(dentry, nd); + if (!dentry) + goto need_lookup; + if (IS_ERR(dentry)) + goto fail; + if (!(nd->flags & LOOKUP_RCU)) + goto done; + } path->mnt = mnt; path->dentry = dentry; if (likely(__follow_mount_rcu(nd, path, inode, false))) @@ -1266,8 +1270,13 @@ done2: if (!dentry) goto need_lookup; found: - if (dentry->d_flags & DCACHE_OP_REVALIDATE) - goto need_revalidate; + if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) { + dentry = do_revalidate(dentry, nd); + if (!dentry) + goto need_lookup; + if (IS_ERR(dentry)) + goto fail; + } done: path->mnt = mnt; path->dentry = dentry; @@ -1309,16 +1318,6 @@ need_lookup: mutex_unlock(&dir->i_mutex); goto found; -need_revalidate: - dentry = do_revalidate(dentry, nd); - if (!dentry) - goto need_lookup; - if (IS_ERR(dentry)) - goto fail; - if (nd->flags & LOOKUP_RCU) - goto done2; - goto done; - fail: return PTR_ERR(dentry); } @@ -1415,11 +1414,7 @@ exec_again: goto out_dput; if (inode->i_op->follow_link) { - /* We commonly drop rcu-walk here */ - if (nameidata_dentry_drop_rcu_maybe(nd, next.dentry)) - return -ECHILD; - BUG_ON(inode != next.dentry->d_inode); - err = do_follow_link(&next, nd); + err = do_follow_link(inode, &next, nd); if (err) goto return_err; nd->inode = nd->path.dentry->d_inode; @@ -1463,10 +1458,7 @@ last_component: break; if (inode && unlikely(inode->i_op->follow_link) && (lookup_flags & LOOKUP_FOLLOW)) { - if (nameidata_dentry_drop_rcu_maybe(nd, next.dentry)) - return -ECHILD; - BUG_ON(inode != next.dentry->d_inode); - err = do_follow_link(&next, nd); + err = do_follow_link(inode, &next, nd); if (err) goto return_err; nd->inode = nd->path.dentry->d_inode; @@ -1500,12 +1492,15 @@ return_reval: * We may need to check the cached dentry for staleness. */ if (need_reval_dot(nd->path.dentry)) { + if (nameidata_drop_rcu_last_maybe(nd)) + return -ECHILD; /* Note: we do not d_invalidate() */ err = d_revalidate(nd->path.dentry, nd); if (!err) err = -ESTALE; if (err < 0) break; + return 0; } return_base: if (nameidata_drop_rcu_last_maybe(nd)) @@ -2265,8 +2260,6 @@ static struct file *finish_open(struct nameidata *nd, return filp; exit: - if (!IS_ERR(nd->intent.open.file)) - release_open_intent(nd); path_put(&nd->path); return ERR_PTR(error); } @@ -2389,8 +2382,6 @@ exit_mutex_unlock: exit_dput: path_put_conditional(path, nd); exit: - if (!IS_ERR(nd->intent.open.file)) - release_open_intent(nd); path_put(&nd->path); return ERR_PTR(error); } @@ -2477,6 +2468,7 @@ struct file *do_filp_open(int dfd, const char *pathname, } audit_inode(pathname, nd.path.dentry); filp = finish_open(&nd, open_flag, acc_mode); + release_open_intent(&nd); return filp; creat: @@ -2553,6 +2545,7 @@ out: path_put(&nd.root); if (filp == ERR_PTR(-ESTALE) && !(flags & LOOKUP_REVAL)) goto reval; + release_open_intent(&nd); return filp; exit_dput: @@ -2560,8 +2553,6 @@ exit_dput: out_path: path_put(&nd.path); out_filp: - if (!IS_ERR(nd.intent.open.file)) - release_open_intent(&nd); filp = ERR_PTR(error); goto out; } diff --git a/fs/namespace.c b/fs/namespace.c index 7b0b95371696..d1edf26025dc 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1244,7 +1244,7 @@ static int do_umount(struct vfsmount *mnt, int flags) */ br_write_lock(vfsmount_lock); if (mnt_get_count(mnt) != 2) { - br_write_lock(vfsmount_lock); + br_write_unlock(vfsmount_lock); return -EBUSY; } br_write_unlock(vfsmount_lock); diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 3be975e18919..cde36cb0f348 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -484,7 +484,7 @@ static int decode_cb_sequence4res(struct xdr_stream *xdr, out: return status; out_default: - return nfs_cb_stat_to_errno(status); + return nfs_cb_stat_to_errno(nfserr); } /* @@ -564,11 +564,9 @@ static int nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, if (unlikely(status)) goto out; if (unlikely(nfserr != NFS4_OK)) - goto out_default; + status = nfs_cb_stat_to_errno(nfserr); out: return status; -out_default: - return nfs_cb_stat_to_errno(status); } /* diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index d98d0213285d..54b60bfceb8d 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -230,9 +230,6 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f dp->dl_client = clp; get_nfs4_file(fp); dp->dl_file = fp; - dp->dl_vfs_file = find_readable_file(fp); - get_file(dp->dl_vfs_file); - dp->dl_flock = NULL; dp->dl_type = type; dp->dl_stateid.si_boot = boot_time; dp->dl_stateid.si_stateownerid = current_delegid++; @@ -241,8 +238,6 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); dp->dl_time = 0; atomic_set(&dp->dl_count, 1); - list_add(&dp->dl_perfile, &fp->fi_delegations); - list_add(&dp->dl_perclnt, &clp->cl_delegations); INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); return dp; } @@ -253,36 +248,30 @@ nfs4_put_delegation(struct nfs4_delegation *dp) if (atomic_dec_and_test(&dp->dl_count)) { dprintk("NFSD: freeing dp %p\n",dp); put_nfs4_file(dp->dl_file); - fput(dp->dl_vfs_file); kmem_cache_free(deleg_slab, dp); num_delegations--; } } -/* Remove the associated file_lock first, then remove the delegation. - * lease_modify() is called to remove the FS_LEASE file_lock from - * the i_flock list, eventually calling nfsd's lock_manager - * fl_release_callback. - */ -static void -nfs4_close_delegation(struct nfs4_delegation *dp) +static void nfs4_put_deleg_lease(struct nfs4_file *fp) { - dprintk("NFSD: close_delegation dp %p\n",dp); - /* XXX: do we even need this check?: */ - if (dp->dl_flock) - vfs_setlease(dp->dl_vfs_file, F_UNLCK, &dp->dl_flock); + if (atomic_dec_and_test(&fp->fi_delegees)) { + vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); + fp->fi_lease = NULL; + fp->fi_deleg_file = NULL; + } } /* Called under the state lock. */ static void unhash_delegation(struct nfs4_delegation *dp) { - list_del_init(&dp->dl_perfile); list_del_init(&dp->dl_perclnt); spin_lock(&recall_lock); + list_del_init(&dp->dl_perfile); list_del_init(&dp->dl_recall_lru); spin_unlock(&recall_lock); - nfs4_close_delegation(dp); + nfs4_put_deleg_lease(dp->dl_file); nfs4_put_delegation(dp); } @@ -958,8 +947,6 @@ expire_client(struct nfs4_client *clp) spin_lock(&recall_lock); while (!list_empty(&clp->cl_delegations)) { dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); - dprintk("NFSD: expire client. dp %p, fp %p\n", dp, - dp->dl_flock); list_del_init(&dp->dl_perclnt); list_move(&dp->dl_recall_lru, &reaplist); } @@ -2078,6 +2065,7 @@ alloc_init_file(struct inode *ino) fp->fi_inode = igrab(ino); fp->fi_id = current_fileid++; fp->fi_had_conflict = false; + fp->fi_lease = NULL; memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); memset(fp->fi_access, 0, sizeof(fp->fi_access)); spin_lock(&recall_lock); @@ -2329,23 +2317,8 @@ nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access) nfs4_file_put_access(fp, O_RDONLY); } -/* - * Spawn a thread to perform a recall on the delegation represented - * by the lease (file_lock) - * - * Called from break_lease() with lock_flocks() held. - * Note: we assume break_lease will only call this *once* for any given - * lease. - */ -static -void nfsd_break_deleg_cb(struct file_lock *fl) +static void nfsd_break_one_deleg(struct nfs4_delegation *dp) { - struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; - - dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); - if (!dp) - return; - /* We're assuming the state code never drops its reference * without first removing the lease. Since we're in this lease * callback (and since the lease code is serialized by the kernel @@ -2353,22 +2326,35 @@ void nfsd_break_deleg_cb(struct file_lock *fl) * it's safe to take a reference: */ atomic_inc(&dp->dl_count); - spin_lock(&recall_lock); list_add_tail(&dp->dl_recall_lru, &del_recall_lru); - spin_unlock(&recall_lock); /* only place dl_time is set. protected by lock_flocks*/ dp->dl_time = get_seconds(); + nfsd4_cb_recall(dp); +} + +/* Called from break_lease() with lock_flocks() held. */ +static void nfsd_break_deleg_cb(struct file_lock *fl) +{ + struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; + struct nfs4_delegation *dp; + + BUG_ON(!fp); + /* We assume break_lease is only called once per lease: */ + BUG_ON(fp->fi_had_conflict); /* * We don't want the locks code to timeout the lease for us; - * we'll remove it ourself if the delegation isn't returned - * in time. + * we'll remove it ourself if a delegation isn't returned + * in time: */ fl->fl_break_time = 0; - dp->dl_file->fi_had_conflict = true; - nfsd4_cb_recall(dp); + spin_lock(&recall_lock); + fp->fi_had_conflict = true; + list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) + nfsd_break_one_deleg(dp); + spin_unlock(&recall_lock); } static @@ -2459,13 +2445,15 @@ nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) static struct nfs4_delegation * find_delegation_file(struct nfs4_file *fp, stateid_t *stid) { - struct nfs4_delegation *dp; + struct nfs4_delegation *dp = NULL; + spin_lock(&recall_lock); list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) - return dp; + break; } - return NULL; + spin_unlock(&recall_lock); + return dp; } int share_access_to_flags(u32 share_access) @@ -2641,6 +2629,66 @@ static bool nfsd4_cb_channel_good(struct nfs4_client *clp) return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; } +static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) +{ + struct file_lock *fl; + + fl = locks_alloc_lock(); + if (!fl) + return NULL; + locks_init_lock(fl); + fl->fl_lmops = &nfsd_lease_mng_ops; + fl->fl_flags = FL_LEASE; + fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; + fl->fl_end = OFFSET_MAX; + fl->fl_owner = (fl_owner_t)(dp->dl_file); + fl->fl_pid = current->tgid; + return fl; +} + +static int nfs4_setlease(struct nfs4_delegation *dp, int flag) +{ + struct nfs4_file *fp = dp->dl_file; + struct file_lock *fl; + int status; + + fl = nfs4_alloc_init_lease(dp, flag); + if (!fl) + return -ENOMEM; + fl->fl_file = find_readable_file(fp); + list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); + status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); + if (status) { + list_del_init(&dp->dl_perclnt); + locks_free_lock(fl); + return -ENOMEM; + } + fp->fi_lease = fl; + fp->fi_deleg_file = fl->fl_file; + get_file(fp->fi_deleg_file); + atomic_set(&fp->fi_delegees, 1); + list_add(&dp->dl_perfile, &fp->fi_delegations); + return 0; +} + +static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) +{ + struct nfs4_file *fp = dp->dl_file; + + if (!fp->fi_lease) + return nfs4_setlease(dp, flag); + spin_lock(&recall_lock); + if (fp->fi_had_conflict) { + spin_unlock(&recall_lock); + return -EAGAIN; + } + atomic_inc(&fp->fi_delegees); + list_add(&dp->dl_perfile, &fp->fi_delegations); + spin_unlock(&recall_lock); + list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); + return 0; +} + /* * Attempt to hand out a delegation. */ @@ -2650,7 +2698,6 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta struct nfs4_delegation *dp; struct nfs4_stateowner *sop = stp->st_stateowner; int cb_up; - struct file_lock *fl; int status, flag = 0; cb_up = nfsd4_cb_channel_good(sop->so_client); @@ -2681,36 +2728,11 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta } dp = alloc_init_deleg(sop->so_client, stp, fh, flag); - if (dp == NULL) { - flag = NFS4_OPEN_DELEGATE_NONE; - goto out; - } - status = -ENOMEM; - fl = locks_alloc_lock(); - if (!fl) - goto out; - locks_init_lock(fl); - fl->fl_lmops = &nfsd_lease_mng_ops; - fl->fl_flags = FL_LEASE; - fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; - fl->fl_end = OFFSET_MAX; - fl->fl_owner = (fl_owner_t)dp; - fl->fl_file = find_readable_file(stp->st_file); - BUG_ON(!fl->fl_file); - fl->fl_pid = current->tgid; - dp->dl_flock = fl; - - /* vfs_setlease checks to see if delegation should be handed out. - * the lock_manager callback fl_change is used - */ - if ((status = vfs_setlease(fl->fl_file, fl->fl_type, &fl))) { - dprintk("NFSD: setlease failed [%d], no delegation\n", status); - dp->dl_flock = NULL; - locks_free_lock(fl); - unhash_delegation(dp); - flag = NFS4_OPEN_DELEGATE_NONE; - goto out; - } + if (dp == NULL) + goto out_no_deleg; + status = nfs4_set_delegation(dp, flag); + if (status) + goto out_free; memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); @@ -2722,6 +2744,12 @@ out: && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) dprintk("NFSD: WARNING: refusing delegation reclaim\n"); open->op_delegate_type = flag; + return; +out_free: + nfs4_put_delegation(dp); +out_no_deleg: + flag = NFS4_OPEN_DELEGATE_NONE; + goto out; } /* @@ -2916,8 +2944,6 @@ nfs4_laundromat(void) test_val = u; break; } - dprintk("NFSD: purging unused delegation dp %p, fp %p\n", - dp, dp->dl_flock); list_move(&dp->dl_recall_lru, &reaplist); } spin_unlock(&recall_lock); @@ -3128,7 +3154,7 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, goto out; renew_client(dp->dl_client); if (filpp) { - *filpp = find_readable_file(dp->dl_file); + *filpp = dp->dl_file->fi_deleg_file; BUG_ON(!*filpp); } } else { /* open or lock stateid */ diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 956629b9cdc9..1275b8655070 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -317,8 +317,8 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); - if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) - goto out_nfserr; + if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) + return status; iattr->ia_valid |= ATTR_UID; } if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { @@ -328,8 +328,8 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); - if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) - goto out_nfserr; + if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) + return status; iattr->ia_valid |= ATTR_GID; } if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 3074656ba7bf..2d31224b07bf 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -83,8 +83,6 @@ struct nfs4_delegation { atomic_t dl_count; /* ref count */ struct nfs4_client *dl_client; struct nfs4_file *dl_file; - struct file *dl_vfs_file; - struct file_lock *dl_flock; u32 dl_type; time_t dl_time; /* For recall: */ @@ -379,6 +377,9 @@ struct nfs4_file { */ atomic_t fi_readers; atomic_t fi_writers; + struct file *fi_deleg_file; + struct file_lock *fi_lease; + atomic_t fi_delegees; struct inode *fi_inode; u32 fi_id; /* used with stateowner->so_id * for stateid_hashtbl hash */ diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 641117f2188d..da1d9701f8e4 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -808,7 +808,7 @@ nfsd_get_raparms(dev_t dev, ino_t ino) if (ra->p_count == 0) frap = rap; } - depth = nfsdstats.ra_size*11/10; + depth = nfsdstats.ra_size; if (!frap) { spin_unlock(&rab->pb_lock); return NULL; @@ -1744,6 +1744,13 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen, host_err = nfsd_break_lease(odentry->d_inode); if (host_err) goto out_drop_write; + if (ndentry->d_inode) { + host_err = nfsd_break_lease(ndentry->d_inode); + if (host_err) + goto out_drop_write; + } + if (host_err) + goto out_drop_write; host_err = vfs_rename(fdir, odentry, tdir, ndentry); if (!host_err) { host_err = commit_metadata(tfhp); @@ -1812,22 +1819,22 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, host_err = mnt_want_write(fhp->fh_export->ex_path.mnt); if (host_err) - goto out_nfserr; + goto out_put; host_err = nfsd_break_lease(rdentry->d_inode); if (host_err) - goto out_put; + goto out_drop_write; if (type != S_IFDIR) host_err = vfs_unlink(dirp, rdentry); else host_err = vfs_rmdir(dirp, rdentry); -out_put: - dput(rdentry); - if (!host_err) host_err = commit_metadata(fhp); - +out_drop_write: mnt_drop_write(fhp->fh_export->ex_path.mnt); +out_put: + dput(rdentry); + out_nfserr: err = nfserrno(host_err); out: diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c index 388e9e8f5286..85f7baa15f5d 100644 --- a/fs/nilfs2/btnode.c +++ b/fs/nilfs2/btnode.c @@ -35,11 +35,6 @@ #include "btnode.h" -void nilfs_btnode_cache_init_once(struct address_space *btnc) -{ - nilfs_mapping_init_once(btnc); -} - static const struct address_space_operations def_btnode_aops = { .sync_page = block_sync_page, }; diff --git a/fs/nilfs2/btnode.h b/fs/nilfs2/btnode.h index 79037494f1e0..1b8ebd888c28 100644 --- a/fs/nilfs2/btnode.h +++ b/fs/nilfs2/btnode.h @@ -37,7 +37,6 @@ struct nilfs_btnode_chkey_ctxt { struct buffer_head *newbh; }; -void nilfs_btnode_cache_init_once(struct address_space *); void nilfs_btnode_cache_init(struct address_space *, struct backing_dev_info *); void nilfs_btnode_cache_clear(struct address_space *); struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc, diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c index 6a0e2a189f60..a0babd2bff6a 100644 --- a/fs/nilfs2/mdt.c +++ b/fs/nilfs2/mdt.c @@ -454,9 +454,9 @@ int nilfs_mdt_setup_shadow_map(struct inode *inode, struct backing_dev_info *bdi = inode->i_sb->s_bdi; INIT_LIST_HEAD(&shadow->frozen_buffers); - nilfs_mapping_init_once(&shadow->frozen_data); + address_space_init_once(&shadow->frozen_data); nilfs_mapping_init(&shadow->frozen_data, bdi, &shadow_map_aops); - nilfs_mapping_init_once(&shadow->frozen_btnodes); + address_space_init_once(&shadow->frozen_btnodes); nilfs_mapping_init(&shadow->frozen_btnodes, bdi, &shadow_map_aops); mi->mi_shadow = shadow; return 0; diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 0c432416cfef..a585b35fd6bc 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -492,19 +492,6 @@ unsigned nilfs_page_count_clean_buffers(struct page *page, return nc; } -void nilfs_mapping_init_once(struct address_space *mapping) -{ - memset(mapping, 0, sizeof(*mapping)); - INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC); - spin_lock_init(&mapping->tree_lock); - INIT_LIST_HEAD(&mapping->private_list); - spin_lock_init(&mapping->private_lock); - - spin_lock_init(&mapping->i_mmap_lock); - INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap); - INIT_LIST_HEAD(&mapping->i_mmap_nonlinear); -} - void nilfs_mapping_init(struct address_space *mapping, struct backing_dev_info *bdi, const struct address_space_operations *aops) diff --git a/fs/nilfs2/page.h b/fs/nilfs2/page.h index 622df27cd891..2a00953ebd5f 100644 --- a/fs/nilfs2/page.h +++ b/fs/nilfs2/page.h @@ -61,7 +61,6 @@ void nilfs_free_private_page(struct page *); int nilfs_copy_dirty_pages(struct address_space *, struct address_space *); void nilfs_copy_back_pages(struct address_space *, struct address_space *); void nilfs_clear_dirty_pages(struct address_space *); -void nilfs_mapping_init_once(struct address_space *mapping); void nilfs_mapping_init(struct address_space *mapping, struct backing_dev_info *bdi, const struct address_space_operations *aops); diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 58fd707174e1..1673b3d99842 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -1279,7 +1279,7 @@ static void nilfs_inode_init_once(void *obj) #ifdef CONFIG_NILFS_XATTR init_rwsem(&ii->xattr_sem); #endif - nilfs_btnode_cache_init_once(&ii->i_btnode_cache); + address_space_init_once(&ii->i_btnode_cache); ii->i_bmap = &ii->i_bmap_data; inode_init_once(&ii->vfs_inode); } diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h index 43e56b97f9c0..6180da1e37e6 100644 --- a/fs/ocfs2/journal.h +++ b/fs/ocfs2/journal.h @@ -405,9 +405,9 @@ static inline int ocfs2_remove_extent_credits(struct super_block *sb) ocfs2_quota_trans_credits(sb); } -/* data block for new dir/symlink, 2 for bitmap updates (bitmap fe + - * bitmap block for the new bit) dx_root update for free list */ -#define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + 2 + 1) +/* data block for new dir/symlink, allocation of directory block, dx_root + * update for free list */ +#define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + OCFS2_SUBALLOC_ALLOC + 1) static inline int ocfs2_add_dir_index_credits(struct super_block *sb) { diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c index b5f9160e93e9..19ebc5aad391 100644 --- a/fs/ocfs2/refcounttree.c +++ b/fs/ocfs2/refcounttree.c @@ -3228,7 +3228,7 @@ static int ocfs2_make_clusters_writable(struct super_block *sb, u32 num_clusters, unsigned int e_flags) { int ret, delete, index, credits = 0; - u32 new_bit, new_len; + u32 new_bit, new_len, orig_num_clusters; unsigned int set_len; struct ocfs2_super *osb = OCFS2_SB(sb); handle_t *handle; @@ -3261,6 +3261,8 @@ static int ocfs2_make_clusters_writable(struct super_block *sb, goto out; } + orig_num_clusters = num_clusters; + while (num_clusters) { ret = ocfs2_get_refcount_rec(ref_ci, context->ref_root_bh, p_cluster, num_clusters, @@ -3348,7 +3350,8 @@ static int ocfs2_make_clusters_writable(struct super_block *sb, * in write-back mode. */ if (context->get_clusters == ocfs2_di_get_clusters) { - ret = ocfs2_cow_sync_writeback(sb, context, cpos, num_clusters); + ret = ocfs2_cow_sync_writeback(sb, context, cpos, + orig_num_clusters); if (ret) mlog_errno(ret); } diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 38f986d2447e..36c423fb0635 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -1316,7 +1316,7 @@ static int ocfs2_parse_options(struct super_block *sb, struct mount_options *mopt, int is_remount) { - int status; + int status, user_stack = 0; char *p; u32 tmp; @@ -1459,6 +1459,15 @@ static int ocfs2_parse_options(struct super_block *sb, memcpy(mopt->cluster_stack, args[0].from, OCFS2_STACK_LABEL_LEN); mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; + /* + * Open code the memcmp here as we don't have + * an osb to pass to + * ocfs2_userspace_stack(). + */ + if (memcmp(mopt->cluster_stack, + OCFS2_CLASSIC_CLUSTER_STACK, + OCFS2_STACK_LABEL_LEN)) + user_stack = 1; break; case Opt_inode64: mopt->mount_opt |= OCFS2_MOUNT_INODE64; @@ -1514,13 +1523,16 @@ static int ocfs2_parse_options(struct super_block *sb, } } - /* Ensure only one heartbeat mode */ - tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | - OCFS2_MOUNT_HB_NONE); - if (hweight32(tmp) != 1) { - mlog(ML_ERROR, "Invalid heartbeat mount options\n"); - status = 0; - goto bail; + if (user_stack == 0) { + /* Ensure only one heartbeat mode */ + tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | + OCFS2_MOUNT_HB_GLOBAL | + OCFS2_MOUNT_HB_NONE); + if (hweight32(tmp) != 1) { + mlog(ML_ERROR, "Invalid heartbeat mount options\n"); + status = 0; + goto bail; + } } status = 1; diff --git a/fs/open.c b/fs/open.c index e52389e1f05b..5a2c6ebc22b5 100644 --- a/fs/open.c +++ b/fs/open.c @@ -790,6 +790,8 @@ struct file *nameidata_to_filp(struct nameidata *nd) /* Pick up the filp from the open intent */ filp = nd->intent.open.file; + nd->intent.open.file = NULL; + /* Has the filesystem initialised the file for us? */ if (filp->f_path.dentry == NULL) { path_get(&nd->path); diff --git a/fs/partitions/ldm.c b/fs/partitions/ldm.c index 789c625c7aa5..b10e3540d5b7 100644 --- a/fs/partitions/ldm.c +++ b/fs/partitions/ldm.c @@ -251,6 +251,11 @@ static bool ldm_parse_vmdb (const u8 *data, struct vmdb *vm) } vm->vblk_size = get_unaligned_be32(data + 0x08); + if (vm->vblk_size == 0) { + ldm_error ("Illegal VBLK size"); + return false; + } + vm->vblk_offset = get_unaligned_be32(data + 0x0C); vm->last_vblk_seq = get_unaligned_be32(data + 0x04); diff --git a/fs/partitions/mac.c b/fs/partitions/mac.c index 68d6a216ee79..11f688bd76c5 100644 --- a/fs/partitions/mac.c +++ b/fs/partitions/mac.c @@ -29,10 +29,9 @@ static inline void mac_fix_string(char *stg, int len) int mac_partition(struct parsed_partitions *state) { - int slot = 1; Sector sect; unsigned char *data; - int blk, blocks_in_map; + int slot, blocks_in_map; unsigned secsize; #ifdef CONFIG_PPC_PMAC int found_root = 0; @@ -59,10 +58,14 @@ int mac_partition(struct parsed_partitions *state) put_dev_sector(sect); return 0; /* not a MacOS disk */ } - strlcat(state->pp_buf, " [mac]", PAGE_SIZE); blocks_in_map = be32_to_cpu(part->map_count); - for (blk = 1; blk <= blocks_in_map; ++blk) { - int pos = blk * secsize; + if (blocks_in_map < 0 || blocks_in_map >= DISK_MAX_PARTS) { + put_dev_sector(sect); + return 0; + } + strlcat(state->pp_buf, " [mac]", PAGE_SIZE); + for (slot = 1; slot <= blocks_in_map; ++slot) { + int pos = slot * secsize; put_dev_sector(sect); data = read_part_sector(state, pos/512, §); if (!data) @@ -113,13 +116,11 @@ int mac_partition(struct parsed_partitions *state) } if (goodness > found_root_goodness) { - found_root = blk; + found_root = slot; found_root_goodness = goodness; } } #endif /* CONFIG_PPC_PMAC */ - - ++slot; } #ifdef CONFIG_PPC_PMAC if (found_root_goodness) diff --git a/fs/proc/array.c b/fs/proc/array.c index df2b703b9d0f..7c99c1cf7e5c 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -353,9 +353,6 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, task_cap(m, task); task_cpus_allowed(m, task); cpuset_task_status_allowed(m, task); -#if defined(CONFIG_S390) - task_show_regs(m, task); -#endif task_context_switch_counts(m, task); return 0; } diff --git a/fs/super.c b/fs/super.c index 74e149efed81..7e9dd4cc2c01 100644 --- a/fs/super.c +++ b/fs/super.c @@ -177,6 +177,11 @@ void deactivate_locked_super(struct super_block *s) struct file_system_type *fs = s->s_type; if (atomic_dec_and_test(&s->s_active)) { fs->kill_sb(s); + /* + * We need to call rcu_barrier so all the delayed rcu free + * inodes are flushed before we release the fs module. + */ + rcu_barrier(); put_filesystem(fs); put_super(s); } else { diff --git a/fs/xfs/linux-2.6/xfs_discard.c b/fs/xfs/linux-2.6/xfs_discard.c index 05201ae719e5..d61611c88012 100644 --- a/fs/xfs/linux-2.6/xfs_discard.c +++ b/fs/xfs/linux-2.6/xfs_discard.c @@ -152,6 +152,8 @@ xfs_ioc_trim( if (!capable(CAP_SYS_ADMIN)) return -XFS_ERROR(EPERM); + if (!blk_queue_discard(q)) + return -XFS_ERROR(EOPNOTSUPP); if (copy_from_user(&range, urange, sizeof(range))) return -XFS_ERROR(EFAULT); diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index cec89dd5d7d2..85668efb3e3e 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -53,6 +53,9 @@ xfs_fs_geometry( xfs_fsop_geom_t *geo, int new_version) { + + memset(geo, 0, sizeof(*geo)); + geo->blocksize = mp->m_sb.sb_blocksize; geo->rtextsize = mp->m_sb.sb_rextsize; geo->agblocks = mp->m_sb.sb_agblocks; |