From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F308CC10F11 for ; Wed, 24 Apr 2019 12:48:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BC3FA218B0 for ; Wed, 24 Apr 2019 12:48:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730268AbfDXMsf (ORCPT ); Wed, 24 Apr 2019 08:48:35 -0400 Received: from mx2.suse.de ([195.135.220.15]:54868 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727518AbfDXMsf (ORCPT ); Wed, 24 Apr 2019 08:48:35 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 4DD2BAEC6 for ; Wed, 24 Apr 2019 12:48:34 +0000 (UTC) From: Qu Wenruo To: linux-btrfs@vger.kernel.org Subject: [PATCH] btrfs: ctree: Dump the leaf before BUG_ON() Date: Wed, 24 Apr 2019 20:48:29 +0800 Message-Id: <20190424124829.14277-1-wqu@suse.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org We have a user reporting BUG_ON() triggered in btrfs_set_item_key_safe(). Let's dump the leaf content before triggering BUG_ON() so that we can have some clue on what's going wrong. The output of tree locks should help us to debug such problem. Signed-off-by: Qu Wenruo --- fs/btrfs/ctree.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index f52eb952597b..c769a7b50ba4 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -3185,10 +3185,12 @@ void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, slot = path->slots[0]; if (slot > 0) { btrfs_item_key(eb, &disk_key, slot - 1); + btrfs_print_leaf(eb); BUG_ON(comp_keys(&disk_key, new_key) >= 0); } if (slot < btrfs_header_nritems(eb) - 1) { btrfs_item_key(eb, &disk_key, slot + 1); + btrfs_print_leaf(eb); BUG_ON(comp_keys(&disk_key, new_key) <= 0); } -- 2.21.0