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vfs: make sync_filesystem return errors from ->sync_fs 

Strangely, sync_filesystem ignores the return code from the ->sync_fs
call, which means that syscalls like syncfs(2) never see the error.
This doesn't seem right, so fix that.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Darrick J. Wong 2022-01-30 08:53:16 -08:00
parent 2719c7160d
commit 5679897eb1
1 changed files with 12 additions and 6 deletions
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18
fs/sync.c
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@ -29,7 +29,7 @@
*/ */
int sync_filesystem(struct super_block *sb) int sync_filesystem(struct super_block *sb)
{ {
int ret; int ret = 0;
/* /*
* We need to be protected against the filesystem going from * We need to be protected against the filesystem going from
@ -52,15 +52,21 @@ int sync_filesystem(struct super_block *sb)
* at a time. * at a time.
*/ */
writeback_inodes_sb(sb, WB_REASON_SYNC); writeback_inodes_sb(sb, WB_REASON_SYNC);
if (sb->s_op->sync_fs) if (sb->s_op->sync_fs) {
sb->s_op->sync_fs(sb, 0); ret = sb->s_op->sync_fs(sb, 0);
if (ret)
return ret;
}
ret = sync_blockdev_nowait(sb->s_bdev); ret = sync_blockdev_nowait(sb->s_bdev);
if (ret < 0) if (ret)
return ret; return ret;
sync_inodes_sb(sb); sync_inodes_sb(sb);
if (sb->s_op->sync_fs) if (sb->s_op->sync_fs) {
sb->s_op->sync_fs(sb, 1); ret = sb->s_op->sync_fs(sb, 1);
if (ret)
return ret;
}
return sync_blockdev(sb->s_bdev); return sync_blockdev(sb->s_bdev);
} }
EXPORT_SYMBOL(sync_filesystem); EXPORT_SYMBOL(sync_filesystem);