[PATCH] f2fs: update inode ctime on exchange rename

[Hungyu Lin]

When two regular files are exchanged with renameat2(RENAME_EXCHANGE),
their ctimes remain unchanged. f2fs_cross_rename() applies its explicit
ctime updates and dirty marking to old_dir and new_dir, which have
already been updated by f2fs_set_link().

Update old_inode and new_inode instead, matching the ordinary rename
path. Keep the existing parent link-count handling, which dirties the
parents through f2fs_i_links_write().

Fixes: 32f9bc25cbda ("f2fs: support ->rename2()")
Signed-off-by: Hungyu Lin <dennylin0707@xxxxxxxxx>
---
 fs/f2fs/namei.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index ce5d536d892b..880dfd44c04a 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -1287,13 +1287,13 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 		f2fs_i_pino_write(old_inode, new_dir->i_ino);
 	f2fs_up_write(&F2FS_I(old_inode)->i_sem);
 
-	inode_set_ctime_current(old_dir);
+	inode_set_ctime_current(old_inode);
 	if (old_nlink) {
 		f2fs_down_write(&F2FS_I(old_dir)->i_sem);
 		f2fs_i_links_write(old_dir, old_nlink > 0);
 		f2fs_up_write(&F2FS_I(old_dir)->i_sem);
 	}
-	f2fs_mark_inode_dirty_sync(old_dir, true);
+	f2fs_mark_inode_dirty_sync(old_inode, true);
 
 	/* update directory entry info of new dir inode */
 	f2fs_set_link(new_dir, new_entry, new_block, old_inode);
@@ -1306,13 +1306,13 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 		f2fs_i_pino_write(new_inode, old_dir->i_ino);
 	f2fs_up_write(&F2FS_I(new_inode)->i_sem);
 
-	inode_set_ctime_current(new_dir);
+	inode_set_ctime_current(new_inode);
 	if (new_nlink) {
 		f2fs_down_write(&F2FS_I(new_dir)->i_sem);
 		f2fs_i_links_write(new_dir, new_nlink > 0);
 		f2fs_up_write(&F2FS_I(new_dir)->i_sem);
 	}
-	f2fs_mark_inode_dirty_sync(new_dir, true);
+	f2fs_mark_inode_dirty_sync(new_inode, true);
 
 	if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
 		f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
-- 
2.43.0