diff options
| author | Yan, Zheng | 2009-09-21 22:00:26 +0200 |
|---|---|---|
| committer | Chris Mason | 2009-09-21 22:00:26 +0200 |
| commit | 76dda93c6ae2c1dc3e6cde34569d6aca26b0c918 (patch) | |
| tree | f5ca46ec89d4ae2c762952d5f35e2c6f95ac046a /fs/btrfs/extent-tree.c | |
| parent | Btrfs: change how subvolumes are organized (diff) | |
| download | kernel-qcow2-linux-76dda93c6ae2c1dc3e6cde34569d6aca26b0c918.tar.gz kernel-qcow2-linux-76dda93c6ae2c1dc3e6cde34569d6aca26b0c918.tar.xz kernel-qcow2-linux-76dda93c6ae2c1dc3e6cde34569d6aca26b0c918.zip | |
Btrfs: add snapshot/subvolume destroy ioctl
This patch adds snapshot/subvolume destroy ioctl. A subvolume that isn't being
used and doesn't contains links to other subvolumes can be destroyed.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 8fc922982183..4bd04f3fa8bb 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -5463,9 +5463,24 @@ int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref) ret = btrfs_del_root(trans, tree_root, &root->root_key); BUG_ON(ret); - free_extent_buffer(root->node); - free_extent_buffer(root->commit_root); - kfree(root); + if (root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID) { + ret = btrfs_find_last_root(tree_root, root->root_key.objectid, + NULL, NULL); + BUG_ON(ret < 0); + if (ret > 0) { + ret = btrfs_del_orphan_item(trans, tree_root, + root->root_key.objectid); + BUG_ON(ret); + } + } + + if (root->in_radix) { + btrfs_free_fs_root(tree_root->fs_info, root); + } else { + free_extent_buffer(root->node); + free_extent_buffer(root->commit_root); + kfree(root); + } out: btrfs_end_transaction(trans, tree_root); kfree(wc); |