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=-0.7 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,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 2A71CC0044C for ; Fri, 2 Nov 2018 00:26:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A981320666 for ; Fri, 2 Nov 2018 00:26:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A981320666 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gmx.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 S1728260AbeKBJbt (ORCPT ); Fri, 2 Nov 2018 05:31:49 -0400 Received: from mout.gmx.net ([212.227.15.19]:50049 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728109AbeKBJbs (ORCPT ); Fri, 2 Nov 2018 05:31:48 -0400 Received: from [0.0.0.0] ([149.28.201.231]) by mail.gmx.com (mrgmx002 [212.227.17.184]) with ESMTPSA (Nemesis) id 0M23zf-1fOTcP1ZkZ-00u2rL; Fri, 02 Nov 2018 01:26:35 +0100 Received: from [0.0.0.0] ([149.28.201.231]) by mail.gmx.com (mrgmx002 [212.227.17.184]) with ESMTPSA (Nemesis) id 0M23zf-1fOTcP1ZkZ-00u2rL; Fri, 02 Nov 2018 01:26:35 +0100 Subject: Re: btrfs partition is broken, cannot restore anything To: Attila Vangel , linux-btrfs@vger.kernel.org References: From: Qu Wenruo Openpgp: preference=signencrypt Autocrypt: addr=quwenruo.btrfs@gmx.com; prefer-encrypt=mutual; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAHNIlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT7CwJQEEwEIAD4CGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCWdWCnQUJCWYC bgAKCRDCPZHzoSX+qAR8B/94VAsSNygx1C6dhb1u1Wp1Jr/lfO7QIOK/nf1PF0VpYjTQ2au8 ihf/RApTna31sVjBx3jzlmpy+lDoPdXwbI3Czx1PwDbdhAAjdRbvBmwM6cUWyqD+zjVm4RTG rFTPi3E7828YJ71Vpda2qghOYdnC45xCcjmHh8FwReLzsV2A6FtXsvd87bq6Iw2axOHVUax2 FGSbardMsHrya1dC2jF2R6n0uxaIc1bWGweYsq0LXvLcvjWH+zDgzYCUB0cfb+6Ib/ipSCYp 3i8BevMsTs62MOBmKz7til6Zdz0kkqDdSNOq8LgWGLOwUTqBh71+lqN2XBpTDu1eLZaNbxSI ilaVzsBNBFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcga CbPEwhLj1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj /IrRUUka68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fN GSsRb+pKEKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0 q1eW4Jrv0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEv ABEBAAHCwHwEGAEIACYWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCWdWBrwIbDAUJA8JnAAAK CRDCPZHzoSX+qA3xB/4zS8zYh3Cbm3FllKz7+RKBw/ETBibFSKedQkbJzRlZhBc+XRwF61mi f0SXSdqKMbM1a98fEg8H5kV6GTo62BzvynVrf/FyT+zWbIVEuuZttMk2gWLIvbmWNyrQnzPl mnjK4AEvZGIt1pk+3+N/CMEfAZH5Aqnp0PaoytRZ/1vtMXNgMxlfNnb96giC3KMR6U0E+siA 4V7biIoyNoaN33t8m5FwEwd2FQDG9dAXWhG13zcm9gnk63BN3wyCQR+X5+jsfBaS4dvNzvQv h8Uq/YGjCoV1ofKYh3WKMY8avjq25nlrhzD/Nto9jHp8niwr21K//pXVA81R2qaXqGbql+zo Message-ID: <9b5a27c9-561c-2f76-c19f-4ab5af33e541@gmx.com> Date: Fri, 2 Nov 2018 08:26:31 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="RIFJopafQHA9A4ERcn12wwSQK9UkKlwV9" X-Provags-ID: V03:K1:31tbDzyMXYbe/TZX18pnm5W5CG2z1rYLWToryTZc+9iNFq1iWKC Gmlu+U3LFMS5inSjj4sEr2t50N1LnatX4/LCU88DfuAm5/I0j1uCVBAacWfuEynwrSHJ2gM xx7eRkepdc+/BWTd0tvei1UlUzJexq1sX2dehDOM3AyqfeDL8XgiiDR9FGupVPdJoqF0ZYu VknlRrzlWO3N9NtbbnU2g== X-UI-Out-Filterresults: notjunk:1;V01:K0:s0+va1Cy2io=:+Bt8fOOS5N/LkwB+VxT79O 0mNT+YV6ZzUXKl7LYa/mblXwS8UTDKZ5zKMiyt/sAyAK4WJVeMpW3TDo98oHmec4xOsPDfm/5 +L3+44Hks/wy/TuSi4eIJLS5Ec7vPfbZDHb0LscLmQbszgMsnjKLUI4obJoJ+ikF/Mvoj4rR9 W9gBeOVrN/ryQM2ORPoUItZkjiX8ZofCnp9N2toV9O77eD03p5DR84Ahhb8NnpHLSMRX/P4Ze 1v4pVBjdcIiInYRyS49kX7rwGkqdSvslVxE1X/0MYUqeoflJVq0LhT4t6Gl4ExY/cVrkzQkrp iiz1mY9OcL/pS+M/qJfwMU698O8WaVzaj5pkp3hO++73DplRHmuh0Ss53JlD1cLTofEcnvuhe N+9aTV7JcBu5r18XL1P7bbnoKkWkxU25Cx6kmWrhto4uZfARYvD6pao230PVBkwtEwN6HXOjf uaObYi5pQSglNpPNvdea/dxZ8qMQooI1Z3vQFWV2olg0ETicA8PK0Q9CrmERnIVxe/sF8b/Pp 8PGtx3uZ42cCxQh1osTPYoGY8obkYrVihthIFJ4Bq2n/JsASkzk+ByLppPPX63dhY4sfcIZSW YAMymAUu4yTS93waxnDQ6CH9zvjDpKJW8a1nDKMEWs5PAKXsIfNcUdt/Tz1rAD5sxujxXVPfq QJ0gGc8YhLiwzrGgfa5iS/0CXtXjO2hDaY1WUBNMS7tjzvaDY5S0HPai9IJBfhK0CIKOvfFfm MJQPZjso4+Nj6Pg+UCdk9UJkfINIAwkTNjrCSd/09uAlf4GlnRmM5UzMj3auJ3lTyHrmShytg 95HkfTCTxOXi0tGOj8CjG6qhaOLyQ== 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) --RIFJopafQHA9A4ERcn12wwSQK9UkKlwV9 Content-Type: multipart/mixed; boundary="YIDcJwmHnSrYHUM81EB8dl0aUiybvwBZU"; protected-headers="v1" From: Qu Wenruo To: Attila Vangel , linux-btrfs@vger.kernel.org Message-ID: <9b5a27c9-561c-2f76-c19f-4ab5af33e541@gmx.com> Subject: Re: btrfs partition is broken, cannot restore anything References: In-Reply-To: --YIDcJwmHnSrYHUM81EB8dl0aUiybvwBZU Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2018/11/2 =E4=B8=8A=E5=8D=884:40, Attila Vangel wrote: > Hi, >=20 > Somehow my btrfs partition got broken. I use Arch, so my kernel is > quite new (4.18.x). > I don't remember exactly the sequence of events. At some point it was > accessible in read-only, but unfortunately I did not take backup > immediately. dmesg log from that time: >=20 > [ 62.602388] BTRFS warning (device nvme0n1p2): block group > 103923318784 has wrong amount of free space > [ 62.602390] BTRFS warning (device nvme0n1p2): failed to load free > space cache for block group 103923318784, rebuilding it now > [ 108.039188] BTRFS error (device nvme0n1p2): bad tree block start 0 18= 812026880 > [ 108.039227] BTRFS: error (device nvme0n1p2) in > __btrfs_free_extent:7010: errno=3D-5 IO failure Normally we shouldn't call __btrfs_free_extent() during mount. It looks like it's caused by log tree replay. You could try to mount the fs with -o ro,nologreplay to see if you could still mount the fs RO without log replay. If it goes well, at least you could access the files. > [ 108.039241] BTRFS info (device nvme0n1p2): forced readonly > [ 108.039250] BTRFS: error (device nvme0n1p2) in > btrfs_run_delayed_refs:3076: errno=3D-5 IO failure >=20 > At the next reboot it failed to mount. Problem may have been that at > some point I booted to another distro with older kernel (4.15.x, > 4.14.52) and unfortunately attempted some checks/repairs (?) e.g. from > gparted, and at that time I did not know it could be destructive.> > Anyway, currently it fails to mount (even with ro and/or recovery), > btrfs check results in "checksum verify failed" and "bad tree block" > errors, Full btrfs check result please. > btrfs restore resulted in "We have looped trying to restore > files in" errors for a dozen of paths then exit. So at least btrfs-restore is working. This normally means the fs is not completely corrupted, and essential trees are at least OK. Still need that "btrfs check" output (along with "btrfs check --mode=3Dlowmem") to determine what to do. Thanks, Qu >=20 > Is there some hope to save data from the filesystem, and if so, how? >=20 > BTW I checked some diagnostics commands regarding my SSD with the nvme > client and from that it seems there are no hardware problems. >=20 > Your help is highly appreciated. >=20 > Cheers, > Attila >=20 --YIDcJwmHnSrYHUM81EB8dl0aUiybvwBZU-- --RIFJopafQHA9A4ERcn12wwSQK9UkKlwV9 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEELd9y5aWlW6idqkLhwj2R86El/qgFAlvbmbcACgkQwj2R86El /qichgf7BZmRWYylcuIbxnPgwLMz8pByFvD4N+XnDBDQBL6nLoLJLDGtUsS3XTNn paQS3IzObE+zuVnHZB+QD3L4jUtXBEKkkddrw73G1AUc6Ppm4N78nWWvQ8yGRe3+ TiEGcsbNNtkGmb+q1MgzNMJ+N+DGcn+6AOK7bH7iRWOK4bBLVmjuft1RJzcWnMVG fCvw2YCnlO8reZ5fv5krmB0Pre3MpO02FZmoFa1r/H878VxVTCdtv4wrI/d6x0MX eigc5gB4riJOIWhVOHFEgFfRTj9CVo7pWEbaAJ/CLDmMB1//DJz6OOxZx3tzBG8A 0eebW16zOKIFCOpD7mlMUtj+sNf4Yw== =Bbcx -----END PGP SIGNATURE----- --RIFJopafQHA9A4ERcn12wwSQK9UkKlwV9--