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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 2706BC43441 for ; Fri, 9 Nov 2018 18:13:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D6AAA20855 for ; Fri, 9 Nov 2018 18:13:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=virtall.com header.i=@virtall.com header.b="L3LmaoTn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D6AAA20855 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=virtall.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-btrfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728475AbeKJDy7 (ORCPT ); Fri, 9 Nov 2018 22:54:59 -0500 Received: from mail.virtall.com ([46.4.129.203]:37176 "EHLO mail.virtall.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728026AbeKJDy7 (ORCPT ); Fri, 9 Nov 2018 22:54:59 -0500 X-Greylist: delayed 308 seconds by postgrey-1.27 at vger.kernel.org; Fri, 09 Nov 2018 22:54:58 EST Received: from mail.virtall.com (localhost [127.0.0.1]) by mail.virtall.com (Postfix) with ESMTP id 1CB793552E77 for ; Fri, 9 Nov 2018 18:08:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=virtall.com; s=default; t=1541786884; bh=9G/6EHDCjq1Z5oD6W+ZoJjS8nxuWOjaI+7uN62kYKGg=; h=Date:From:To:Subject; b=L3LmaoTng/6GrI9hOudi6cwWvkI6PMtawL8b7e+38E7EiqNpiBCM1Mp1wLorrUx9T EpREm4Ct77ZWEUKHrar5l57MpZaJ+2mZrqdvS40aANjo2+k21Zd8+uY4Eo9WLj/h2X 31Fb3/h47mQhSpvuHVHlySMJwE659vmp0GDHFXwIzskILWveYqfo9Z/8J4S9uGVS7v AJ9zqgmFqNWf/eeXzL95PSwzJJXoOwszZjzJ6i6yqkQEcp/BwvqF6mH1xV5cSrbE0k VGksP9CfxSHmZgq/E8aPaicUDjL0HLCZMPX94+J/Yd/h34VWkWrYC4Rc3zw5N72iaa 203sHVq9BJxxw== X-Fuglu-Suspect: 91fe4fc45b9a4028b26cbff4abee614f X-Fuglu-Spamstatus: NO Received: from localhost (localhost [127.0.0.1]) (Authenticated sender: tch@virtall.com) by mail.virtall.com (Postfix) with ESMTPSA for ; Fri, 9 Nov 2018 18:08:02 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Sat, 10 Nov 2018 03:08:01 +0900 From: Tomasz Chmielewski To: Btrfs BTRFS Subject: unable to mount btrfs after upgrading from 4.16.1 to 4.19.1 Message-ID: <2442f641ad54ce98361cf40b70e4d18d@virtall.com> X-Sender: tch@virtall.com Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org btrfs sits on md RAID-5: /dev/md2 /data btrfs noatime,compress-force=zstd,space_cache=v2,noauto 0 0 After upgrading from kernel 4.16.1 to 4.19.1 and a clean restart, the fs no longer mounts: # mount /data mount: wrong fs type, bad option, bad superblock on /dev/md2, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so. # dmesg [ 322.877321] BTRFS info (device md2): force zstd compression, level 0 [ 322.877326] BTRFS info (device md2): enabling free space tree [ 322.877329] BTRFS info (device md2): using free space tree [ 322.877330] BTRFS info (device md2): has skinny extents [ 367.832058] BTRFS error (device md2): bad tree block start, want 21120019922944 have 620757027 [ 367.832116] BTRFS error (device md2): failed to read block groups: -5 [ 367.891339] BTRFS error (device md2): open_ctree failed The error (bad tree block start) in dmesg changes every time as I re-run "mount /data": [ 589.425362] BTRFS error (device md2): bad tree block start, want 22008094932992 have 3378573292323635748 [ 589.425423] BTRFS error (device md2): failed to read block groups: -5 [ 589.469979] BTRFS error (device md2): open_ctree failed [ 680.585908] BTRFS error (device md2): bad tree block start, want 21058406105088 have 18446616720224032488 [ 680.585991] BTRFS error (device md2): failed to read block groups: -5 [ 680.625419] BTRFS error (device md2): open_ctree failed Any advice how to recover? Tomasz Chmielewski https://lxadm.com