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Btrfs: Metadata reservation for orphan inodes

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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>
This commit is contained in:
Yan, Zheng 2010-05-16 10:49:58 -04:00 • committed by Chris Mason
parent 8929ecfa50
commit d68fc57b7e
9 changed files with 367 additions and 68 deletions
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10
fs/btrfs/ioctl.c
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@ -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);