From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cn.fujitsu.com ([222.73.24.84]:39542 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752076AbcDZDtq (ORCPT ); Mon, 25 Apr 2016 23:49:46 -0400 From: Qu Wenruo To: linux-btrfs@vger.kernel.org Cc: dsterba@suse.cz, Lu Fengqi Subject: [PATCH RFC 03/16] btrfs-progs: fsck: Introduce function to query tree block level Date: Tue, 26 Apr 2016 11:48:50 +0800 Message-Id: <1461642543-4621-4-git-send-email-quwenruo@cn.fujitsu.com> In-Reply-To: <1461642543-4621-1-git-send-email-quwenruo@cn.fujitsu.com> References: <1461642543-4621-1-git-send-email-quwenruo@cn.fujitsu.com> MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org List-ID: From: Lu Fengqi Introduce function query_tree_block_level() to resolve tree block level by reading out the tree block. Signed-off-by: Lu Fengqi Signed-off-by: Qu Wenruo --- cmds-check.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/cmds-check.c b/cmds-check.c index d097edd..6633b6e 100644 --- a/cmds-check.c +++ b/cmds-check.c @@ -8716,6 +8716,26 @@ error: return err; } +/* + * Get real tree block level for case like shared block + * Return >= 0 as tree level + * Return <0 for error + */ +static int query_tree_block_level(struct btrfs_fs_info *fs_info, u64 bytenr) +{ + struct extent_buffer *eb; + u32 nodesize = btrfs_super_nodesize(fs_info->super_copy); + int ret = -EIO; + + eb = read_tree_block_fs_info(fs_info, bytenr, nodesize, 0); + if (!extent_buffer_uptodate(eb)) + goto out; + ret = btrfs_header_level(eb); +out: + free_extent_buffer(eb); + return ret; +} + static int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, int overwrite) { -- 2.8.0