btrfs: use ioctl args support mask for subvolume create/delete

Using the defined mask instead of flag enumeration in the ioctl handler
is preferred. No functional changes.

Reviewed-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 7b0c79e..9e173c1 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1838,9 +1838,7 @@ static noinline int btrfs_ioctl_snap_create_v2(struct file *file,
                return PTR_ERR(vol_args);
        vol_args->name[BTRFS_SUBVOL_NAME_MAX] = '\0';
 
-       if (vol_args->flags &
-           ~(BTRFS_SUBVOL_CREATE_ASYNC | BTRFS_SUBVOL_RDONLY |
-             BTRFS_SUBVOL_QGROUP_INHERIT)) {
+       if (vol_args->flags & ~BTRFS_SUBVOL_CREATE_ARGS_MASK) {
                ret = -EOPNOTSUPP;
                goto free_args;
        }