[PATCH] ovl: skip ovl_file_modified() for dedupe operations

DEDUPE only compares data blocks between two files without modifying
file_out, so there is no need to call ovl_file_modified() to sync
attributes from the real inode. This aligns with the existing
guard at the top of ovl_copyfile() which already skips copyattr
and file_remove_privs for OVL_DEDUPE.

Signed-off-by: cuitao <[email protected]>
---
 fs/overlayfs/file.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 27cc07738f33..f1829f425f45 100644
--- a/fs/overlayfs/file.c
+++ b/fs/overlayfs/file.c
@@ -572,7 +572,8 @@ static loff_t ovl_copyfile(struct file *file_in, loff_t pos_in,
 	}
 
 	/* Update size */
-	ovl_file_modified(file_out);
+	if (op != OVL_DEDUPE)
+		ovl_file_modified(file_out);
 
 out_unlock:
 	inode_unlock(inode_out);
-- 
2.43.0