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=-2.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 D9919CA9EB9 for ; Sat, 26 Oct 2019 09:41:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8934B2070B for ; Sat, 26 Oct 2019 09:41:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="DJ4HgB4p" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726239AbfJZJl1 (ORCPT ); Sat, 26 Oct 2019 05:41:27 -0400 Received: from mout.gmx.net ([212.227.17.21]:37167 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726115AbfJZJl1 (ORCPT ); Sat, 26 Oct 2019 05:41:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1572082884; bh=M8mewf7DbSi3jHXNt5KFA8tYZ9wtvEzgdJE3asfSvog=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=DJ4HgB4po9LHUVOuHX0pthBD3JC2XHBeY5JR68W8E8IPwQpUWAwkCJkvZtv28UcEb /VlU4qWnc+UgZekezM0zy+3k3yEluET7S4pfQlaw7RmBf34AxSCShYaruMxZO5cVCk 47x0Fese/FTzjkgRkFL7uyOf1tdcjcZsjInTSy4c= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [0.0.0.0] ([13.231.109.76]) by mail.gmx.com (mrgmx105 [212.227.17.174]) with ESMTPSA (Nemesis) id 1M4JmT-1iOZgg1u8v-000K5T; Sat, 26 Oct 2019 11:41:24 +0200 Subject: Re: first it froze, now the (btrfs) root fs won't mount ... To: Christian Pernegger Cc: "Austin S. Hemmelgarn" , linux-btrfs References: <4608b644-0fa3-7212-af45-0f4eebfb0be9@gmx.com> <20f660ea-d659-7ad5-a84d-83d8bfa3d019@gmx.com> <0d6683ee-4a2c-f2ab-857b-c7cd44442dce@gmail.com> <043c2d26-a067-fd03-4c98-7ff76b081fed@gmail.com> <503118ac-877f-989c-50f2-5e2a3d0b58d8@gmx.com> From: Qu Wenruo Autocrypt: addr=quwenruo.btrfs@gmx.com; prefer-encrypt=mutual; keydata= mQENBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAG0IlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT6JAU4EEwEIADgCGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCXZw1oQAKCRDC PZHzoSX+qCY6CACd+mWu3okGwRKXju6bou+7VkqCaHTdyXwWFTsr+/0ly5nUdDtT3yEVggPJ 3VP70wjlrxUjNjFb6iIvGYxiPOrop1NGwGYvQktgRhaIhALG6rPoSSAhGNjwGVRw0km0PlIN D29BTj/lYEk+jVM1YL0QLgAE1AI3krihg/lp/fQT53wLhR8YZIF8ETXbClQG1vJ0cllPuEEv efKxRyiTSjB+PsozSvYWhXsPeJ+KKjFen7ebE5reQTPFzSHctCdPnoR/4jSPlnTlnEvLeqcD ZTuKfQe1gWrPeevQzgCtgBF/WjIOeJs41klnYzC3DymuQlmFubss0jShLOW8eSOOWhLRuQEN BFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcgaCbPEwhLj 1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj/IrRUUka 68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fNGSsRb+pK EKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0q1eW4Jrv 0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEvABEBAAGJ ATwEGAEIACYCGwwWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCXZw1rgUJCWpOfwAKCRDCPZHz oSX+qFcEB/95cs8cM1OQdE/GgOfCGxwgckMeWyzOR7bkAWW0lDVp2hpgJuxBW/gyfmtBnUai fnggx3EE3ev8HTysZU9q0h+TJwwJKGv6sUc8qcTGFDtavnnl+r6xDUY7A6GvXEsSoCEEynby 72byGeSovfq/4AWGNPBG1L61Exl+gbqfvbECP3ziXnob009+z9I4qXodHSYINfAkZkA523JG ap12LndJeLk3gfWNZfXEWyGnuciRGbqESkhIRav8ootsCIops/SqXm0/k+Kcl4gGUO/iD/T5 oagaDh0QtOd8RWSMwLxwn8uIhpH84Q4X1LadJ5NCgGa6xPP5qqRuiC+9gZqbq4Nj Message-ID: <4a329da3-81ba-3240-8d76-6509dbe2983a@gmx.com> Date: Sat, 26 Oct 2019 17:41:16 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="C2IFCdZGhgRv4LNUTcUzbEENAmNhmV8qn" X-Provags-ID: V03:K1:h6E67/2cGbxvv8p7v7ALd/cUaLfs4GJL9xiKNwmKNQT/e/IANtl o1gDW4K2IjmvkPOgN4o7d2hGaSJLYobOlh1TYvHv6gv7hhT54sTyT68vtdPtznYu7ZFD7j+ HGykJGLdiKVkjSj3yS9mxKa8ekJ4uUkBt5AE39Xu8ThI/IBAvzpJRzt8hO+MkvM//KHb3+d vufRDWBNNvWgKtyZX4lIQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:vA0aPpfZc0U=:VOKgzHtUzx1KfCRpBe+A2H 9Yu1SYfcONpKBHL6qWzcmWoVtc0zUkMB4xA+rcG5vGIs93RQ6bkjWfVP+VNxGj1sLhTmHf7kt AmHwlQ/bR4oASfvYG+8aHIMflDlysITpVjF1wEWyCijsv+FeHZll25hVeqELp4x1B8ycUFD1p LhqkPyU14vPvEjTHSc/hWyJBUpb8Vmi/Fivd+kFc5c9qxPPB2CT6gHj5r2jnwEmE6wsj+uYDX kaLCF4mGe3xxw7gew8HegWuj/Frhi4s4P6AbaOXvunPCylG25K8rOzab5fbDExf8Xs/PosOQ/ 2uVHh20ghvryenj+TB5YeC05iQI7YjV4YuRYUatQHxbGLGoYptpDr7F4COR5ajYK9aUD1hpKN aAR9FOQvhN0Tw0LUin9M1O5X3oUB3or8ubJMiO3B/PJmy0wFXtCn5dSWGSKUSnt/IYNB3KVMw dcqpft0Z37ztgv1AmFNjNP5An6Fa+zeNf60UaE8ggDwOmsEPfGavYpGysoZqRvDRyRTzGNtyl 33FyXpfIYCx20jS6OqwsVKOagxSuxTJ+CUpTGdD4BhYNKsydhuPYvba59kzX+Ohjinmk4RU/k HEjnTdvoxZ4F9ILRlmMsLwY29qE/A1Y2Nv0CNen9lYusF4oLPVvhr0Ooi20gMSywWkhhutCis ldrIJHNA45Iq/KAU5anwn/gkwG7vH7YRj0Y0i9a7hibtwIveXJGXTcqEBmJt8s5L+hJc93nXM gtGIkg/ULLFIe/+Ymt+et8Ls0/VXyq5LNq5F871IuASQ7NGRq+amYJGTyqK8TCYsEUdT9boLt AG843EvTWI5NP78PwCkOloBInQ2IX60IFpaDCkScAZCyDzyL/Xu6bY4vJ7Q3HS+B+xD3VEGz+ CLgFkraijjxDyHU+bqNPYWh6SswKvWEnN7daWLxOpkGnY9V7a8i8QkntBnC76p6V0VGDNo6oj iEoYJd3Xol8XVL4YQK8pAkAEeKKkV3djuxbkf+h+zkiX+WKHx0yKjOI2ildZIdMv+RTs0lV6H jzaqQG/Tm2jgeDWLOQxEhYK/ld2Yniiu6E9FtYscDnsufhaU7ffsAW65OtTxOZnbqbYCBibkZ 9ABvHA+dh7e3UDvIHvCJZ8Zw266nXvjMxWwm+ICDjBU0065g64byReYRFsmZlfCfnjFc1p0K9 123z0OxNUhZzQHuD9omH+1GWO7cvLc3MlTgqddLebANEIL1CHlwDM2mN/4NaM8DIvdbJpnJ7R xUb8ZiUIpXgiH0Yoa6SBItPa35FfZ25wIqu8NIYF/3O/I78KQDuRY9Ymwtn0= Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --C2IFCdZGhgRv4LNUTcUzbEENAmNhmV8qn Content-Type: multipart/mixed; boundary="Wgm5zeBW7RWpZuFfPFUVHjB4uFbZwvbm7" --Wgm5zeBW7RWpZuFfPFUVHjB4uFbZwvbm7 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2019/10/26 =E4=B8=8B=E5=8D=885:23, Christian Pernegger wrote: > Am Sa., 26. Okt. 2019 um 02:01 Uhr schrieb Qu Wenruo : >> It's already working, the problem is, there is a dirty log while >> nologreplay mount option doesn't really work. >=20 > For the record, I didn't try to mount using nologreplay, only > notreelog. (Apologies if notreelog and/or skipbg imply nologreplay.) Then that's the problem. With skipbg, all block groups are marked readonly, any write should go a ENOSPC error. Thus I put a log tree check in skipbg mount option, and if it detects log tree, it refuse to mount and output kernel message to require nologreplay. >=20 >> You can btrfs-zero-log to clear the log, then try again using skipbg >> mount option. >=20 > I don't think I can, actually. At least, zeroing the log didn't work > back when btrfs check --repair was still in the table. Admittedly, > that was using Ubuntu eoan's 5.3 kernel, not yours, and with their > btrfs-progs (5.2.1); I don't think I'd gotten around to compiling > btrfs-progs 5.3, yet. So if you think trying again with the > rescue_options kernel and/or latest btrfs-progs might allow me to zero > the log, I'll try again. > Alternatively, using backup super 1 or 2 got me past that hurdle with > btrfs check --repair, so if there's an option to mount using one of > these ...? > (Output quoted below for reference.) >=20 >>> $ btrfs check --init-extent-tree patient >>> Opening filesystem to check... >>> Checking filesystem on patient >>> UUID: c2bd83d6-2261-47bb-8d18-5aba949651d7 >>> repair mode will force to clear out log tree, are you sure? [y/N]: y >>> ERROR: Corrupted fs, no valid METADATA block group found >>> ERROR: failed to zero log tree: -117 >>> ERROR: attempt to start transaction over already running one >>> # rollback >>> >>> $ btrfs rescue zero-log patient >>> checksum verify failed on 284041084928 found E4E3BDB6 wanted 00000000= >>> checksum verify failed on 284041084928 found E4E3BDB6 wanted 00000000= >>> bad tree block 284041084928, bytenr mismatch, want=3D284041084928, ha= ve=3D0 >>> ERROR: could not open ctree >>> # rollback >>> >>> # hm, super 0 has log_root 284056535040, super 1 and 2 have log_root = 0 ... >>> [...] >=20 >> And thanks for the report, I'll look into why nologreplay doesn't work= =2E >=20 > On the contrary, thank you! It's the least I can do. If there's > anything else I can to help make it less likely (something like) this > bites me or anyone else again, just say the word. Also, I'm curious as > to the state of the data and btrfs restore doesn't care about > checksums, so I'd love to be able to ro-mount the image sometime. Then you can try btrfs-mod-sb, which modifies superblock without mounting the fs. # ./btrfs-sb-mod /dev/nvme/btrfs log_root =3D0 Of course, you'll need to compile btrfs-progs. You don't need to compile the full btrfs-progs, which has quite some dependencies, you only need to: # cd btrfs-progs/ # ./autogen.sh # make btrfs-sb-mod Then try above command. You should got something like: $ ./btrfs-sb-mod /dev/nvme/btrfs log_root =3D0 super block checksum is ok GET: log_root xxxxx (0xXXXXXX) SET: log_root 0 (0x0) Update csum Then try mount with rescue=3Dskipbg,ro again. Thanks, Qu >=20 > Cheers, > C. >=20 --Wgm5zeBW7RWpZuFfPFUVHjB4uFbZwvbm7-- --C2IFCdZGhgRv4LNUTcUzbEENAmNhmV8qn Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEELd9y5aWlW6idqkLhwj2R86El/qgFAl20FL0ACgkQwj2R86El /qhYjgf9HW1OedIGbXaE8j7D+nZz3T2G9b3G88FeAywIc/Ig6EHxD6fkTvTc/XKQ s4c/CIx60UenqYtdu5xJXbXHmvywv8doRM9x51xiBmRvaDZ4Oz7tPSB5cHtL4xhf HJR2/WdRZDJf2DCi+qhOScve+eZJyMYejRxlHka4KmGBR10296U1Gc8kOpEExKNM 3MiGaBfke/DH5Skk4WC8LdsjXEfW7l4B7DDz6YfSBMVytdL7Rou5+rt5fixzOIT1 yfv8b5oq5BN1ldsKFqF3TuPT5Ldq+0JtYRgBlBWsB5bC3zi9OOzPRkg4Ox7yK9Ok UXuqUI1wGiGESJblNUBE1IILsg/iwQ== =tqvm -----END PGP SIGNATURE----- --C2IFCdZGhgRv4LNUTcUzbEENAmNhmV8qn--