From 935a074f48675374a655456ae75fe6be9e8c2388 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Fri, 11 May 2018 11:49:33 -0400 Subject: ovl: Do not do metacopy only for ioctl modifying file attr ovl_copy_up() by default will only do metadata only copy up (if enabled). That means when ovl_real_ioctl() calls ovl_real_file(), it will still get the lower file (as ovl_real_file() opens data file and not metacopy). And that means "chattr +i" will end up modifying lower inode. There seem to be two ways to solve this. A. Open metacopy file in ovl_real_ioctl() and do operations on that B. Force full copy up when FS_IOC_SETFLAGS is called. I am resorting to option B for now as it feels little safer option. If there are performance issues due to this, we can revisit it. Signed-off-by: Vivek Goyal Reviewed-by: Amir Goldstein Signed-off-by: Miklos Szeredi --- fs/overlayfs/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/overlayfs') diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index 5ab281aa64b5..32e9282893c9 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -372,7 +372,7 @@ static long ovl_ioctl(struct file *file, unsigned int cmd, unsigned long arg) if (ret) return ret; - ret = ovl_copy_up(file_dentry(file)); + ret = ovl_copy_up_with_data(file_dentry(file)); if (!ret) { ret = ovl_real_ioctl(file, cmd, arg); -- cgit v1.2.3-59-g8ed1b