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authorChao Yu <yuchao0@huawei.com>2018-10-03 16:32:44 +0200
committerJaegeuk Kim <jaegeuk@kernel.org>2018-10-16 18:36:59 +0200
commitef2a007134b4eaa39264c885999f296577bc87d2 (patch)
tree530892552b47caffba4cf33d84b0d68bc5f334e9 /fs/f2fs/inode.c
parentf2fs: submit cached bio to avoid endless PageWriteback (diff)
downloadlinux-ef2a007134b4eaa39264c885999f296577bc87d2.tar.xz
linux-ef2a007134b4eaa39264c885999f296577bc87d2.zip
f2fs: fix to recover cold bit of inode block during POR
Testcase to reproduce this bug: 1. mkfs.f2fs /dev/sdd 2. mount -t f2fs /dev/sdd /mnt/f2fs 3. touch /mnt/f2fs/file 4. sync 5. chattr +A /mnt/f2fs/file 6. xfs_io -f /mnt/f2fs/file -c "fsync" 7. godown /mnt/f2fs 8. umount /mnt/f2fs 9. mount -t f2fs /dev/sdd /mnt/f2fs 10. chattr -A /mnt/f2fs/file 11. xfs_io -f /mnt/f2fs/file -c "fsync" 12. umount /mnt/f2fs 13. mount -t f2fs /dev/sdd /mnt/f2fs 14. lsattr /mnt/f2fs/file -----------------N- /mnt/f2fs/file But actually, we expect the corrct result is: -------A---------N- /mnt/f2fs/file The reason is in step 9) we missed to recover cold bit flag in inode block, so later, in fsync, we will skip write inode block due to below condition check, result in lossing data in another SPOR. f2fs_fsync_node_pages() if (!IS_DNODE(page) || !is_cold_node(page)) continue; Note that, I guess that some non-dir inode has already lost cold bit during POR, so in order to reenable recovery for those inode, let's try to recover cold bit in f2fs_iget() to save more fsynced data. Fixes: c56675750d7c ("f2fs: remove unneeded set_cold_node()") Cc: <stable@vger.kernel.org> 4.17+ Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/inode.c')
-rw-r--r--fs/f2fs/inode.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 4ee9d6c4b719..57a7a15239d6 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -365,6 +365,12 @@ static int do_read_inode(struct inode *inode)
if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
__recover_inline_status(inode, node_page);
+ /* try to recover cold bit for non-dir inode */
+ if (!S_ISDIR(inode->i_mode) && !is_cold_node(node_page)) {
+ set_cold_node(node_page, false);
+ set_page_dirty(node_page);
+ }
+
/* get rdev by using inline_info */
__get_inode_rdev(inode, ri);