Btrfs: fix race between balance and unused block group deletion

[linux-2.6-block.git] / fs / btrfs / transaction.h

diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 0b24755596bab2fe4c5ba0c60511db33aff51254..eb09c2067fa8d3e9f9e11680fbcbc152130354bc 100644 (file)
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -102,6 +102,7 @@ struct btrfs_transaction {
 struct btrfs_trans_handle {
        u64 transid;
        u64 bytes_reserved;
+       u64 chunk_bytes_reserved;
        u64 qgroup_reserved;
        unsigned long use_count;
        unsigned long blocks_reserved;
@@ -153,6 +154,29 @@ static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
        spin_unlock(&BTRFS_I(inode)->lock);
 }
 
+/*
+ * Make qgroup codes to skip given qgroupid, means the old/new_roots for
+ * qgroup won't contain the qgroupid in it.
+ */
+static inline void btrfs_set_skip_qgroup(struct btrfs_trans_handle *trans,
+                                        u64 qgroupid)
+{
+       struct btrfs_delayed_ref_root *delayed_refs;
+
+       delayed_refs = &trans->transaction->delayed_refs;
+       WARN_ON(delayed_refs->qgroup_to_skip);
+       delayed_refs->qgroup_to_skip = qgroupid;
+}
+
+static inline void btrfs_clear_skip_qgroup(struct btrfs_trans_handle *trans)
+{
+       struct btrfs_delayed_ref_root *delayed_refs;
+
+       delayed_refs = &trans->transaction->delayed_refs;
+       WARN_ON(!delayed_refs->qgroup_to_skip);
+       delayed_refs->qgroup_to_skip = 0;
+}
+
 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
                          struct btrfs_root *root);
 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,