diff options
author | Yan <yanzheng@21cn.com> | 2007-12-04 13:20:20 -0500 |
---|---|---|
committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:03:58 -0400 |
commit | 9691975dd663b255fa52404dc7de4b18892bf244 (patch) | |
tree | f0a413e147596191f2508767736923e15664760b | |
parent | 1a2b2ac78a4151a49267a1e3f48a131f5810814e (diff) |
Btrfs: Fix buffer get/release issue in create_snapshot
btrfs_cow_block expects a reference to be held on the buffer being cow'd.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r-- | fs/btrfs/inode.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 37f8e0321af8..d0af0807d9f8 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c | |||
@@ -2034,11 +2034,11 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen) | |||
2034 | key.objectid = objectid; | 2034 | key.objectid = objectid; |
2035 | key.offset = 1; | 2035 | key.offset = 1; |
2036 | btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); | 2036 | btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); |
2037 | 2037 | extent_buffer_get(root->node); | |
2038 | btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp); | 2038 | btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp); |
2039 | free_extent_buffer(tmp); | ||
2039 | btrfs_set_root_bytenr(&new_root_item, root->node->start); | 2040 | btrfs_set_root_bytenr(&new_root_item, root->node->start); |
2040 | btrfs_set_root_level(&new_root_item, btrfs_header_level(root->node)); | 2041 | btrfs_set_root_level(&new_root_item, btrfs_header_level(root->node)); |
2041 | |||
2042 | ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key, | 2042 | ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key, |
2043 | &new_root_item); | 2043 | &new_root_item); |
2044 | if (ret) | 2044 | if (ret) |