Btrfs: snapshot progress
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index ddc1c13..72be983 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -83,6 +83,8 @@
{
struct btrfs_path *path;
int ret;
+ u32 refs;
+ struct btrfs_root_item *ri;
path = btrfs_alloc_path();
BUG_ON(!path);
@@ -91,7 +93,19 @@
if (ret < 0)
goto out;
BUG_ON(ret != 0);
- ret = btrfs_del_item(trans, root, path);
+ ri = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
+ path->slots[0], struct btrfs_root_item);
+
+ refs = btrfs_root_refs(ri);
+ BUG_ON(refs == 0);
+ if (refs == 1) {
+ ret = btrfs_del_item(trans, root, path);
+printk("deleting root %Lu %Lu %u\n", key->objectid, key->offset, key->flags);
+ } else {
+ btrfs_set_root_refs(ri, refs - 1);
+printk("ref now %u root %Lu %Lu %u\n", refs -1, key->objectid, key->offset, key->flags);
+ mark_buffer_dirty(path->nodes[0]);
+ }
out:
btrfs_release_path(root, path);
btrfs_free_path(path);