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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>
This commit is contained in:
Yan 2007-12-04 13:20:20 -05:00 committed by Chris Mason
parent 1a2b2ac78a
commit 9691975dd6
1 changed files with 2 additions and 2 deletions
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4
fs/btrfs/inode.c
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@ -2034,11 +2034,11 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
key.objectid = objectid;
key.offset = 1;
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
extent_buffer_get(root->node);
btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);
free_extent_buffer(tmp);
btrfs_set_root_bytenr(&new_root_item, root->node->start);
btrfs_set_root_level(&new_root_item, btrfs_header_level(root->node));
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&new_root_item);
if (ret)