diff options
Diffstat (limited to 'fs/cifs/file.c')
-rw-r--r-- | fs/cifs/file.c | 64 |
1 files changed, 49 insertions, 15 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index c9bc56b1baac..2c7689f3998d 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -33,6 +33,7 @@ #include <linux/mount.h> #include <linux/slab.h> #include <linux/swap.h> +#include <linux/mm.h> #include <asm/div64.h> #include "cifsfs.h" #include "cifspdu.h" @@ -732,7 +733,8 @@ reopen_success: if (can_flush) { rc = filemap_write_and_wait(inode->i_mapping); - mapping_set_error(inode->i_mapping, rc); + if (!is_interrupt_error(rc)) + mapping_set_error(inode->i_mapping, rc); if (tcon->unix_ext) rc = cifs_get_inode_info_unix(&inode, full_path, @@ -1103,10 +1105,10 @@ try_again: rc = posix_lock_file(file, flock, NULL); up_write(&cinode->lock_sem); if (rc == FILE_LOCK_DEFERRED) { - rc = wait_event_interruptible(flock->fl_wait, !flock->fl_next); + rc = wait_event_interruptible(flock->fl_wait, !flock->fl_blocker); if (!rc) goto try_again; - posix_unblock_lock(flock); + locks_delete_block(flock); } return rc; } @@ -1131,14 +1133,18 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) /* * Accessing maxBuf is racy with cifs_reconnect - need to store value - * and check it for zero before using. + * and check it before using. */ max_buf = tcon->ses->server->maxBuf; - if (!max_buf) { + if (max_buf < (sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE))) { free_xid(xid); return -EINVAL; } + BUILD_BUG_ON(sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE) > + PAGE_SIZE); + max_buf = min_t(unsigned int, max_buf - sizeof(struct smb_hdr), + PAGE_SIZE); max_num = (max_buf - sizeof(struct smb_hdr)) / sizeof(LOCKING_ANDX_RANGE); buf = kcalloc(max_num, sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL); @@ -1471,12 +1477,16 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, /* * Accessing maxBuf is racy with cifs_reconnect - need to store value - * and check it for zero before using. + * and check it before using. */ max_buf = tcon->ses->server->maxBuf; - if (!max_buf) + if (max_buf < (sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE))) return -EINVAL; + BUILD_BUG_ON(sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE) > + PAGE_SIZE); + max_buf = min_t(unsigned int, max_buf - sizeof(struct smb_hdr), + PAGE_SIZE); max_num = (max_buf - sizeof(struct smb_hdr)) / sizeof(LOCKING_ANDX_RANGE); buf = kcalloc(max_num, sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL); @@ -2109,6 +2119,7 @@ static int cifs_writepages(struct address_space *mapping, pgoff_t end, index; struct cifs_writedata *wdata; int rc = 0; + int saved_rc = 0; unsigned int xid; /* @@ -2137,8 +2148,10 @@ retry: rc = server->ops->wait_mtu_credits(server, cifs_sb->wsize, &wsize, &credits); - if (rc) + if (rc != 0) { + done = true; break; + } tofind = min((wsize / PAGE_SIZE) - 1, end - index) + 1; @@ -2146,6 +2159,7 @@ retry: &found_pages); if (!wdata) { rc = -ENOMEM; + done = true; add_credits_and_wake_if(server, credits, 0); break; } @@ -2174,7 +2188,7 @@ retry: if (rc != 0) { add_credits_and_wake_if(server, wdata->credits, 0); for (i = 0; i < nr_pages; ++i) { - if (rc == -EAGAIN) + if (is_retryable_error(rc)) redirty_page_for_writepage(wbc, wdata->pages[i]); else @@ -2182,7 +2196,7 @@ retry: end_page_writeback(wdata->pages[i]); put_page(wdata->pages[i]); } - if (rc != -EAGAIN) + if (!is_retryable_error(rc)) mapping_set_error(mapping, rc); } kref_put(&wdata->refcount, cifs_writedata_release); @@ -2192,6 +2206,15 @@ retry: continue; } + /* Return immediately if we received a signal during writing */ + if (is_interrupt_error(rc)) { + done = true; + break; + } + + if (rc != 0 && saved_rc == 0) + saved_rc = rc; + wbc->nr_to_write -= nr_pages; if (wbc->nr_to_write <= 0) done = true; @@ -2209,6 +2232,9 @@ retry: goto retry; } + if (saved_rc != 0) + rc = saved_rc; + if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) mapping->writeback_index = index; @@ -2241,8 +2267,8 @@ cifs_writepage_locked(struct page *page, struct writeback_control *wbc) set_page_writeback(page); retry_write: rc = cifs_partialpagewrite(page, 0, PAGE_SIZE); - if (rc == -EAGAIN) { - if (wbc->sync_mode == WB_SYNC_ALL) + if (is_retryable_error(rc)) { + if (wbc->sync_mode == WB_SYNC_ALL && rc == -EAGAIN) goto retry_write; redirty_page_for_writepage(wbc, page); } else if (rc != 0) { @@ -2617,11 +2643,13 @@ cifs_write_from_iter(loff_t offset, size_t len, struct iov_iter *from, if (rc) break; + cur_len = min_t(const size_t, len, wsize); + if (ctx->direct_io) { ssize_t result; result = iov_iter_get_pages_alloc( - from, &pagevec, wsize, &start); + from, &pagevec, cur_len, &start); if (result < 0) { cifs_dbg(VFS, "direct_writev couldn't get user pages " @@ -2630,6 +2658,9 @@ cifs_write_from_iter(loff_t offset, size_t len, struct iov_iter *from, result, from->type, from->iov_offset, from->count); dump_stack(); + + rc = result; + add_credits_and_wake_if(server, credits, 0); break; } cur_len = (size_t)result; @@ -3313,13 +3344,16 @@ cifs_send_async_read(loff_t offset, size_t len, struct cifsFileInfo *open_file, cur_len, &start); if (result < 0) { cifs_dbg(VFS, - "couldn't get user pages (cur_len=%zd)" + "couldn't get user pages (rc=%zd)" " iter type %d" " iov_offset %zd count %zd\n", result, direct_iov.type, direct_iov.iov_offset, direct_iov.count); dump_stack(); + + rc = result; + add_credits_and_wake_if(server, credits, 0); break; } cur_len = (size_t)result; @@ -3956,7 +3990,7 @@ readpages_get_pages(struct address_space *mapping, struct list_head *page_list, INIT_LIST_HEAD(tmplist); - page = list_entry(page_list->prev, struct page, lru); + page = lru_to_page(page_list); /* * Lock the page and put it in the cache. Since no one else |