btrfs: disable qgroups in extent tree v2

Backref lookups are going to be drastically different with extent tree
v2, disable qgroups until we do the work to add this support for extent
tree v2.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 4a9bde1e2c50f89cfc487810ca5016d1cd2f31c7..d437511ed35406f3e359ad6806a60c2ab19a61c3 100644 (file)
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -948,6 +948,12 @@ int btrfs_quota_enable(struct btrfs_fs_info *fs_info)
         */
        lockdep_assert_held_write(&fs_info->subvol_sem);
 
+       if (btrfs_fs_incompat(fs_info, EXTENT_TREE_V2)) {
+               btrfs_err(fs_info,
+                         "qgroups are currently unsupported in extent tree v2");
+               return -EINVAL;
+       }
+
        mutex_lock(&fs_info->qgroup_ioctl_lock);
        if (fs_info->quota_root)
                goto out;