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| author | Hou Tao <houtao1@huawei.com> | 2019-05-14 15:44:32 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-15 11:54:51 +0200 |
| commit | 33440c22a76f5e97def0960c1b378353eed7f946 (patch) | |
| tree | fa386a8b74ad2f6bc1b7c494f4f36204da9c1688 /fs/fat | |
| parent | a36a8879a446f0bb49f5cb18ec8d392fb2198008 (diff) | |
| download | linux-stable-33440c22a76f5e97def0960c1b378353eed7f946.tar.gz linux-stable-33440c22a76f5e97def0960c1b378353eed7f946.tar.bz2 linux-stable-33440c22a76f5e97def0960c1b378353eed7f946.zip | |
fs/fat/file.c: issue flush after the writeback of FAT
[ Upstream commit bd8309de0d60838eef6fb575b0c4c7e95841cf73 ]
fsync() needs to make sure the data & meta-data of file are persistent
after the return of fsync(), even when a power-failure occurs later. In
the case of fat-fs, the FAT belongs to the meta-data of file, so we need
to issue a flush after the writeback of FAT instead before.
Also bail out early when any stage of fsync fails.
Link: http://lkml.kernel.org/r/20190409030158.136316-1-houtao1@huawei.com
Signed-off-by: Hou Tao <houtao1@huawei.com>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/fat')
| -rw-r--r-- | fs/fat/file.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/fat/file.c b/fs/fat/file.c index 4724cc9ad650..62581de09bf1 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -160,12 +160,17 @@ static int fat_file_release(struct inode *inode, struct file *filp) int fat_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync) { struct inode *inode = filp->f_mapping->host; - int res, err; + int err; + + err = __generic_file_fsync(filp, start, end, datasync); + if (err) + return err; - res = generic_file_fsync(filp, start, end, datasync); err = sync_mapping_buffers(MSDOS_SB(inode->i_sb)->fat_inode->i_mapping); + if (err) + return err; - return res ? res : err; + return blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); } |