From: Chao Yu <yuchao0@huawei.com>
Date: Tue, 25 Sep 2018 07:36:01 +0000 (+0800)
Subject: f2fs: fix to recover inode's crtime during POR
X-Git-Tag: rel_imx_5.10.35_2.0.0-somdevices.0~6096^2~34
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=5cd1f387a13b5188b4edb4c834310302a85a6ea2;p=linux.git

f2fs: fix to recover inode's crtime during POR

Testcase to reproduce this bug:
1. mkfs.f2fs -O extra_attr -O inode_crtime /dev/sdd
2. mount -t f2fs /dev/sdd /mnt/f2fs
3. touch /mnt/f2fs/file
4. xfs_io -f /mnt/f2fs/file -c "fsync"
5. godown /mnt/f2fs
6. umount /mnt/f2fs
7. mount -t f2fs /dev/sdd /mnt/f2fs
8. xfs_io -f /mnt/f2fs/file -c "statx -r"

stat.btime.tv_sec = 0
stat.btime.tv_nsec = 0

This patch fixes to recover inode creation time fields during
mount.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index d62f53096b55..8f4e12819c94 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2558,6 +2558,13 @@ retry:
 			F2FS_FITS_IN_INODE(src, le16_to_cpu(src->i_extra_isize),
 								i_projid))
 			dst->i_projid = src->i_projid;
+
+		if (f2fs_sb_has_inode_crtime(sbi->sb) &&
+			F2FS_FITS_IN_INODE(src, le16_to_cpu(src->i_extra_isize),
+							i_crtime_nsec)) {
+			dst->i_crtime = src->i_crtime;
+			dst->i_crtime_nsec = src->i_crtime_nsec;
+		}
 	}
 
 	new_ni = old_ni;