diff options
| -rw-r--r-- | fs/btrfs/ioctl.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 56d92549389c..b908960c9746 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2064,6 +2064,8 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, struct btrfs_root *dest = NULL; struct btrfs_ioctl_vol_args *vol_args; struct btrfs_trans_handle *trans; + struct btrfs_block_rsv block_rsv; + u64 qgroup_reserved; int namelen; int ret; int err = 0; @@ -2153,12 +2155,23 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, if (err) goto out_up_write; + btrfs_init_block_rsv(&block_rsv, BTRFS_BLOCK_RSV_TEMP); + /* + * One for dir inode, two for dir entries, two for root + * ref/backref. + */ + err = btrfs_subvolume_reserve_metadata(root, &block_rsv, + 5, &qgroup_reserved); + if (err) + goto out_up_write; + trans = btrfs_start_transaction(root, 0); if (IS_ERR(trans)) { err = PTR_ERR(trans); - goto out_up_write; + goto out_release; } - trans->block_rsv = &root->fs_info->global_block_rsv; + trans->block_rsv = &block_rsv; + trans->bytes_reserved = block_rsv.size; ret = btrfs_unlink_subvol(trans, root, dir, dest->root_key.objectid, @@ -2188,10 +2201,14 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, } } out_end_trans: + trans->block_rsv = NULL; + trans->bytes_reserved = 0; ret = btrfs_end_transaction(trans, root); if (ret && !err) err = ret; inode->i_flags |= S_DEAD; +out_release: + btrfs_subvolume_release_metadata(root, &block_rsv, qgroup_reserved); out_up_write: up_write(&root->fs_info->subvol_sem); out_unlock: |