Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / btrfs / orphan.c

diff --git a/kernel/fs/btrfs/orphan.c b/kernel/fs/btrfs/orphan.c
new file mode 100644 (file)
index 0000000..47767d5
--- /dev/null
+++ b/kernel/fs/btrfs/orphan.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2008 Red Hat.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include "ctree.h"
+#include "disk-io.h"
+
+int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
+                            struct btrfs_root *root, u64 offset)
+{
+       struct btrfs_path *path;
+       struct btrfs_key key;
+       int ret = 0;
+
+       key.objectid = BTRFS_ORPHAN_OBJECTID;
+       key.type = BTRFS_ORPHAN_ITEM_KEY;
+       key.offset = offset;
+
+       path = btrfs_alloc_path();
+       if (!path)
+               return -ENOMEM;
+
+       ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
+
+       btrfs_free_path(path);
+       return ret;
+}
+
+int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
+                         struct btrfs_root *root, u64 offset)
+{
+       struct btrfs_path *path;
+       struct btrfs_key key;
+       int ret = 0;
+
+       key.objectid = BTRFS_ORPHAN_OBJECTID;
+       key.type = BTRFS_ORPHAN_ITEM_KEY;
+       key.offset = offset;
+
+       path = btrfs_alloc_path();
+       if (!path)
+               return -ENOMEM;
+
+       ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
+       if (ret < 0)
+               goto out;
+       if (ret) { /* JDM: Really? */
+               ret = -ENOENT;
+               goto out;
+       }
+
+       ret = btrfs_del_item(trans, root, path);
+
+out:
+       btrfs_free_path(path);
+       return ret;
+}