f2fs: fix to keep project quota consistent

This patch does below changes to keep consistence of project quota data
in sudden power-cut case:
- update inode.i_projid and project quota atomically under lock_op() in
f2fs_ioc_setproject()
- recover inode.i_projid and project quota in recover_inode()

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

1 files changed, 10 insertions, 2 deletions

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index df2123759ac7..1dfb17f9f9ff 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -254,10 +254,18 @@ static int recover_inode(struct inode *inode, struct page *page)
 			F2FS_FITS_IN_INODE(raw, le16_to_cpu(raw->i_extra_isize),
 								i_projid)) {
 			projid_t i_projid;
+			kprojid_t kprojid;
 
 			i_projid = (projid_t)le32_to_cpu(raw->i_projid);
-			F2FS_I(inode)->i_projid =
-				make_kprojid(&init_user_ns, i_projid);
+			kprojid = make_kprojid(&init_user_ns, i_projid);
+
+			if (!projid_eq(kprojid, F2FS_I(inode)->i_projid)) {
+				err = f2fs_transfer_project_quota(inode,
+								kprojid);
+				if (err)
+					return err;
+				F2FS_I(inode)->i_projid = kprojid;
+			}
 		}
 	}