From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f65.google.com ([209.85.215.65]:36775 "EHLO mail-lf0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751902AbdGDNYj (ORCPT ); Tue, 4 Jul 2017 09:24:39 -0400 Received: by mail-lf0-f65.google.com with SMTP id f28so17850809lfi.3 for ; Tue, 04 Jul 2017 06:24:38 -0700 (PDT) From: Filippe LeMarchand To: Lu Fengqi Cc: linux-btrfs@vger.kernel.org, Qu Wenruo Subject: Re: Btrfs check reports errors, filesystem seems fine Date: Tue, 04 Jul 2017 16:24:30 +0300 Message-ID: <1805399.0XWA7WrQjV@carbide> In-Reply-To: <20170704131636.GC2114@fnst> References: <2049018.boNrIqZ5uI@carbide> <83ad37c7-7c86-1c8f-e575-78ebbc1749b9@cn.fujitsu.com> <20170704131636.GC2114@fnst> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2985585.NeOFnAV0XL"; micalg="sha256"; protocol="application/pkcs7-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --nextPart2985585.NeOFnAV0XL Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sure, here it is: https://drive.google.com/drive/folders/0B1ax9Am81gx9YjJBVVA0LXRHeGc In a letter dated Tuesday, July 4, 2017 16:16:36 MSK user Lu Fengqi wrote: > On Mon, Jul 03, 2017 at 08:34:52AM +0800, Qu Wenruo wrote: > > > > > >At 07/01/2017 07:59 PM, Filippe LeMarchand wrote: > >> Hello everyone. > >> > >> I have an btrfs root partition on Intel 530 ssd, which mounts without errors and seem to work fine, > >> but `btrfs check` gives me foloowing output (and --repair doesn't remove errors): > >> > >> enabling repair mode > >> Checking filesystem on /dev/sda2 > >> UUID: 12c84aa3-ce65-4390-807e-a72cc8a7445e > >> checking extents > >> Fixed 0 roots. > >> checking free space cache > >> cache and super generation don't match, space cache will be invalidated > >> checking fs roots > >> unresolved ref dir 79177 index 0 namelen 14 name deprecated.sxt filetype 1 errors 6, no dir index, no inode ref > > > >This means that in dir whose inode number is 79177, it has a child inode > >pointer pointing to depercated.sxt. > > > >But it doesn't have dir index and corresponding inode ref, which is breaking > >the cross reference rule of btrfs. > > > >Would you please run the following command to dump needed info for us to > >debug? > > > ># btrfs-debug-tree /dev/sda2 | grep 79177 -C 10 > > > >and > > > ># btrfs-debug-tree /dev/sda2 | grep deprecated.sxt -C 10 > > > >and > > > ># btrfs-debug-tree /dev/sda2 | grep deprecated.txt -C 10 > > > > > >Considering the output has both .txt and .sxt, I think that's the problem. > >But such bit-flip should be detected by tree block csum. > >I'm not sure what's wrong with it. > > > >Thanks, > >Qu > > > >> unresolved ref dir 79177 index 417 namelen 14 name deprecated.txt filetype 1 errors 1, no dir item > >> unresolved ref dir 79177 index 0 namelen 14 name deprecated.sxt filetype 1 errors 6, no dir index, no inode ref > >> unresolved ref dir 79177 index 417 namelen 14 name deprecated.txt filetype 1 errors 1, no dir item > >> unresolved ref dir 79177 index 0 namelen 14 name deprecated.sxt filetype 1 errors 6, no dir index, no inode ref > >> unresolved ref dir 79177 index 417 namelen 14 name deprecated.txt filetype 1 errors 1, no dir item > >> unresolved ref dir 79177 index 0 namelen 14 name deprecated.sxt filetype 1 errors 6, no dir index, no inode ref > >> unresolved ref dir 79177 index 417 namelen 14 name deprecated.txt filetype 1 errors 1, no dir item > >> unresolved ref dir 79177 index 0 namelen 14 name deprecated.sxt filetype 1 errors 6, no dir index, no inode ref > >> unresolved ref dir 79177 index 417 namelen 14 name deprecated.txt filetype 1 errors 1, no dir item > >> unresolved ref dir 79177 index 0 namelen 14 name deprecated.sxt filetype 1 errors 6, no dir index, no inode ref > >> unresolved ref dir 79177 index 417 namelen 14 name deprecated.txt filetype 1 errors 1, no dir item > >> unresolved ref dir 79177 index 0 namelen 14 name deprecated.sxt filetype 1 errors 6, no dir index, no inode ref > >> unresolved ref dir 79177 index 417 namelen 14 name deprecated.txt filetype 1 errors 1, no dir item > >> unresolved ref dir 79177 index 0 namelen 14 name deprecated.sxt filetype 1 errors 6, no dir index, no inode ref > >> unresolved ref dir 79177 index 417 namelen 14 name deprecated.txt filetype 1 errors 1, no dir item > >> unresolved ref dir 79177 index 0 namelen 14 name deprecated.sxt filetype 1 errors 6, no dir index, no inode ref > >> unresolved ref dir 79177 index 417 namelen 14 name deprecated.txt filetype 1 errors 1, no dir item > >> checking csums > >> checking root refs > >> found 23421812736 bytes used err is 0 > >> total csum bytes: 21531608 > >> total tree bytes: 776650752 > >> total fs tree bytes: 711278592 > >> total extent tree bytes: 36798464 > >> btree space waste bytes: 116002036 > >> file data blocks allocated: 850546470912 > >> referenced 27611987968 > >> > >> Is it dangerous and what should I do about it? > >> > >> I also tried --clear-space-cache, but it just removes the line about space cache. > >> > > > > > >-- > >To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > >the body of a message to majordomo@vger.kernel.org > >More majordomo info at http://vger.kernel.org/majordomo-info.html > > I'm afraid that your mail may be rejected because the attachment size > exceeds the allowable limit(100kB) of btrfs mailing list. Could you > share the attachment by google drive? > > Lastly, while Qu's timing is too tight, I will assist you on this issue. > > --nextPart2985585.NeOFnAV0XL Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEPww ggXYMIIDwKADAgECAhBMqvnK22Nv4B/3TthbA4adMA0GCSqGSIb3DQEBDAUAMIGFMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYD VQQKExFDT01PRE8gQ0EgTGltaXRlZDErMCkGA1UEAxMiQ09NT0RPIFJTQSBDZXJ0aWZpY2F0aW9u IEF1dGhvcml0eTAeFw0xMDAxMTkwMDAwMDBaFw0zODAxMTgyMzU5NTlaMIGFMQswCQYDVQQGEwJH QjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQK ExFDT01PRE8gQ0EgTGltaXRlZDErMCkGA1UEAxMiQ09NT0RPIFJTQSBDZXJ0aWZpY2F0aW9uIEF1 dGhvcml0eTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAJHoVJLSClaxrA0k3cXPRGd0 mSs3o30jcABxvFPfxPoqEo9LfxBWvZ9wcrdhf8lLDxenPeOwBGHu/xGXx/SGPgr6Plz5k+Y0etkU 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