Btrfs: Introduce global metadata reservation
Reserve metadata space for extent tree, checksum tree and root tree
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index b10eacd..f7ac8e0 100644
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -117,13 +117,14 @@
path->nodes[1], 0,
cache_only, &last_ret,
&root->defrag_progress);
- WARN_ON(ret && ret != -EAGAIN);
+ if (ret) {
+ WARN_ON(ret == -EAGAIN);
+ goto out;
+ }
if (next_key_ret == 0) {
memcpy(&root->defrag_progress, &key, sizeof(key));
ret = -EAGAIN;
}
-
- btrfs_release_path(root, path);
out:
if (path)
btrfs_free_path(path);