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authorYan, Zheng <zheng.yan@oracle.com>2010-05-16 10:49:58 -0400
committerChris Mason <chris.mason@oracle.com>2010-05-25 10:34:52 -0400
commitd68fc57b7e3245cfacf2e3b47acfed1946a11786 (patch)
treec2572fcd935017440c8370c8a12ceb49a7fc4f1f /fs/btrfs/ioctl.c
parent8929ecfa50f266163832eeacfbc3642ed5eb83b6 (diff)
Btrfs: Metadata reservation for orphan inodes
reserve metadata space for handling orphan inodes Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/ioctl.c')
-rw-r--r--fs/btrfs/ioctl.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a0686658a3f6..4cdb98cf26de 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1297,10 +1297,12 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
dest->root_item.drop_level = 0;
btrfs_set_root_refs(&dest->root_item, 0);
- ret = btrfs_insert_orphan_item(trans,
- root->fs_info->tree_root,
- dest->root_key.objectid);
- BUG_ON(ret);
+ if (!xchg(&dest->orphan_item_inserted, 1)) {
+ ret = btrfs_insert_orphan_item(trans,
+ root->fs_info->tree_root,
+ dest->root_key.objectid);
+ BUG_ON(ret);
+ }
ret = btrfs_commit_transaction(trans, root);
BUG_ON(ret);