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authorYan, Zheng <zheng.yan@oracle.com>2009-09-21 16:00:26 -0400
committerChris Mason <chris.mason@oracle.com>2009-09-21 16:00:26 -0400
commit76dda93c6ae2c1dc3e6cde34569d6aca26b0c918 (patch)
treef5ca46ec89d4ae2c762952d5f35e2c6f95ac046a /fs/btrfs/tree-log.c
parent4df27c4d5cc1dda54ed7d0a8389347f2df359cf9 (diff)
downloadblackbird-op-linux-76dda93c6ae2c1dc3e6cde34569d6aca26b0c918.tar.gz
blackbird-op-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/tree-log.c')
-rw-r--r--fs/btrfs/tree-log.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 6e674d76186d..4d7d9abef42f 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2841,7 +2841,7 @@ static noinline int check_parent_dirs_for_sync(struct btrfs_trans_handle *trans,
if (!parent || !parent->d_inode || sb != parent->d_inode->i_sb)
break;
- if (parent == sb->s_root)
+ if (IS_ROOT(parent))
break;
parent = parent->d_parent;
@@ -2880,6 +2880,12 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
goto end_no_trans;
}
+ if (root != BTRFS_I(inode)->root ||
+ btrfs_root_refs(&root->root_item) == 0) {
+ ret = 1;
+ goto end_no_trans;
+ }
+
ret = check_parent_dirs_for_sync(trans, inode, parent,
sb, last_committed);
if (ret)
@@ -2907,12 +2913,15 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
break;
inode = parent->d_inode;
+ if (root != BTRFS_I(inode)->root)
+ break;
+
if (BTRFS_I(inode)->generation >
root->fs_info->last_trans_committed) {
ret = btrfs_log_inode(trans, root, inode, inode_only);
BUG_ON(ret);
}
- if (parent == sb->s_root)
+ if (IS_ROOT(parent))
break;
parent = parent->d_parent;
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