Btrfs: add qgroup inheritance

When creating a subvolume or snapshot, it is necessary
to initialize the qgroup account with a copy of some
other (tracking) qgroup. This patch adds parameters
to the ioctls to pass the information from which qgroup
to inherit.

Signed-off-by: Arne Jansen <sensille@gmx.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index f1e29fbd5317..127283913a42 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -990,6 +990,14 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
                 }
         }
 
+        ret = btrfs_qgroup_inherit(trans, fs_info, root->root_key.objectid,
+                                   objectid, pending->inherit);
+        kfree(pending->inherit);
+        if (ret) {
+                pending->error = ret;
+                goto fail;
+        }
+
         key.objectid = objectid;
         key.offset = (u64)-1;
         key.type = BTRFS_ROOT_ITEM_KEY;