[Ocfs2-users] fsck.ocfs2 loops + hangs but does not check
Joseph Qi
joseph.qi at huawei.com
Thu Mar 24 06:10:00 PDT 2016
Hi Michael,
So I think the block of record #153 goes wrong, which points next to
block 4083643392 of record #19.
But the problem is we don't know the right info of the block of record
#153, otherwise we can dd out, edit it and then dd in to fix it.
Thanks,
Joseph
On 2016/3/24 18:38, Michael Ulbrich wrote:
> Hi Joseph,
>
> ok, got it! Here's the loop in chain 73:
>
> Group Chain: 73 Parent Inode: 13 Generation: 1172963971
> CRC32: 00000000 ECC: 0000
> ## Block# Total Used Free Contig Size
> 0 4280773632 15872 11487 4385 1774 1984
> 1 2583263232 15872 5341 10531 5153 1984
> 2 4543613952 15872 5329 10543 5119 1984
> 3 4532662272 15872 10753 5119 5119 1984
> 4 4539963392 15872 3223 12649 7530 1984
> 5 4536312832 15872 5219 10653 5534 1984
> 6 4529011712 15872 6047 9825 3359 1984
> 7 4525361152 15872 4475 11397 5809 1984
> 8 4521710592 15872 3182 12690 5844 1984
> 9 4518060032 15872 5881 9991 5131 1984
> 10 4236966912 15872 10753 5119 5119 1984
> 11 4098245632 15872 10756 5116 3388 1984
> 12 4514409472 15872 8826 7046 5119 1984
> 13 3441144832 15872 15 15857 9680 1984
> 14 4404892672 15872 7563 8309 5119 1984
> 15 4233316352 15872 9398 6474 5114 1984
> 16 4488855552 15872 6358 9514 5119 1984
> 17 3901115392 15872 9932 5940 3757 1984
> 18 4507108352 15872 6557 9315 6166 1984
> 19 4083643392 15872 571 15301 4914 1984 <--
> 20 4510758912 15872 4834 11038 6601 1984
> 21 4492506112 15872 6532 9340 5119 1984
> 22 4496156672 15872 10753 5119 5119 1984
> 23 4503457792 15872 10718 5154 5119 1984
> ...
> 154 4083643392 15872 571 15301 4914 1984 <--
> 155 4510758912 15872 4834 11038 6601 1984
> 156 4492506112 15872 6532 9340 5119 1984
> 157 4496156672 15872 10753 5119 5119 1984
> 158 4503457792 15872 10718 5154 5119 1984
> ...
> 289 4083643392 15872 571 15301 4914 1984 <--
> 290 4510758912 15872 4834 11038 6601 1984
> 291 4492506112 15872 6532 9340 5119 1984
> 292 4496156672 15872 10753 5119 5119 1984
> 293 4503457792 15872 10718 5154 5119 1984
>
> etc.
>
> So the loop begins at record #154 and spans 135 records, right?
>
> Will backup fs metadata as soon as I have some external storage at hand.
>
> Thanks a lot so far ... Michael
>
> On 03/24/2016 10:41 AM, Joseph Qi wrote:
>> Hi Michael,
>> It seems that dead loop happens in chain 73. You have formatted using 2K
>> block and 4K cluster, so each chain should have 1522 or 1521 records.
>> But at first glance, I cannot figure out which block goes wrong, because
>> the output you pasted indicates all blocks are different. So I suggest
>> you investigate the all blocks which belong to chain 73 and try to find
>> out if there is a loop there.
>> BTW, have you backed up the metadata using o2image?
>>
>> Thanks,
>> Joseph
>>
>> On 2016/3/24 16:40, Michael Ulbrich wrote:
>>> Hi Joseph,
>>>
>>> thanks a lot for your help. It is very much appreciated!
>>>
>>> I ran debugsfs.ocfs2 from ocfs2-tools 1.6.4 on the mounted file system:
>>>
>>> root at s1a:~# debugfs.ocfs2 -R 'stat //global_bitmap' /dev/drbd1 >
>>> debugfs_drbd1.log 2>&1
>>>
>>> Inode: 13 Mode: 0644 Generation: 1172963971 (0x45ea0283)
>>> FS Generation: 1172963971 (0x45ea0283)
>>> CRC32: 00000000 ECC: 0000
>>> Type: Regular Attr: 0x0 Flags: Valid System Allocbitmap Chain
>>> Dynamic Features: (0x0)
>>> User: 0 (root) Group: 0 (root) Size: 11381315956736
>>> Links: 1 Clusters: 2778641591
>>> ctime: 0x54010183 -- Sat Aug 30 00:41:07 2014
>>> atime: 0x54010183 -- Sat Aug 30 00:41:07 2014
>>> mtime: 0x54010183 -- Sat Aug 30 00:41:07 2014
>>> dtime: 0x0 -- Thu Jan 1 01:00:00 1970
>>> ctime_nsec: 0x00000000 -- 0
>>> atime_nsec: 0x00000000 -- 0
>>> mtime_nsec: 0x00000000 -- 0
>>> Refcount Block: 0
>>> Last Extblk: 0 Orphan Slot: 0
>>> Sub Alloc Slot: Global Sub Alloc Bit: 7
>>> Bitmap Total: 2778641591 Used: 1083108631 Free: 1695532960
>>> Clusters per Group: 15872 Bits per Cluster: 1
>>> Count: 115 Next Free Rec: 115
>>> ## Total Used Free Block#
>>> 0 24173056 9429318 14743738 4533995520
>>> 1 24173056 9421663 14751393 4548629504
>>> 2 24173056 9432421 14740635 4588817408
>>> 3 24173056 9427533 14745523 4548692992
>>> 4 24173056 9433978 14739078 4508568576
>>> 5 24173056 9436974 14736082 4636369920
>>> 6 24173056 9428411 14744645 4563390464
>>> 7 24173056 9426950 14746106 4479459328
>>> 8 24173056 9428099 14744957 4548851712
>>> 9 24173056 9431794 14741262 4585389056
>>> ...
>>> 105 24157184 9414241 14742943 4690652160
>>> 106 24157184 9419715 14737469 4467999744
>>> 107 24157184 9411479 14745705 4431525888
>>> 108 24157184 9413235 14743949 4559327232
>>> 109 24157184 9417948 14739236 4500950016
>>> 110 24157184 9411013 14746171 4566691840
>>> 111 24157184 9421252 14735932 4522916864
>>> 112 24157184 9416726 14740458 4537550848
>>> 113 24157184 9415358 14741826 4676303872
>>> 114 24157184 9420448 14736736 4526662656
>>>
>>> Group Chain: 0 Parent Inode: 13 Generation: 1172963971
>>> CRC32: 00000000 ECC: 0000
>>> ## Block# Total Used Free Contig Size
>>> 0 4533995520 15872 6339 9533 3987 1984
>>> 1 4530344960 15872 10755 5117 5117 1984
>>> 2 2997109760 15872 10753 5119 5119 1984
>>> 3 4526694400 15872 10753 5119 5119 1984
>>> 4 3022663680 15872 10753 5119 5119 1984
>>> 5 4512092160 15872 9043 6829 2742 1984
>>> 6 4523043840 15872 4948 10924 9612 1984
>>> 7 4519393280 15872 6150 9722 5595 1984
>>> 8 4515742720 15872 4323 11549 6603 1984
>>> 9 3771028480 15872 10753 5119 5119 1984
>>> ...
>>> 1513 5523297280 15872 1 15871 15871 1984
>>> 1514 5526947840 15872 1 15871 15871 1984
>>> 1515 5530598400 15872 1 15871 15871 1984
>>> 1516 5534248960 15872 1 15871 15871 1984
>>> 1517 5537899520 15872 1 15871 15871 1984
>>> 1518 5541550080 15872 1 15871 15871 1984
>>> 1519 5545200640 15872 1 15871 15871 1984
>>> 1520 5548851200 15872 1 15871 15871 1984
>>> 1521 5552501760 15872 1 15871 15871 1984
>>> 1522 5556152320 15872 1 15871 15871 1984
>>>
>>> Group Chain: 1 Parent Inode: 13 Generation: 1172963971
>>> CRC32: 00000000 ECC: 0000
>>> ## Block# Total Used Free Contig Size
>>> 0 4548629504 15872 10755 5117 2496 1984
>>> 1 2993490944 15872 59 15813 14451 1984
>>> 2 2489713664 15872 10758 5114 3726 1984
>>> 3 3117609984 15872 3958 11914 6165 1984
>>> 4 2544472064 15872 10753 5119 5119 1984
>>> 5 3040948224 15872 10753 5119 5119 1984
>>> 6 2971587584 15872 10753 5119 5119 1984
>>> 7 4493871104 15872 8664 7208 3705 1984
>>> 8 4544978944 15872 8711 7161 2919 1984
>>> 9 4417209344 15872 3253 12619 6447 1984
>>> ...
>>> 1513 5523329024 15872 1 15871 15871 1984
>>> 1514 5526979584 15872 1 15871 15871 1984
>>> 1515 5530630144 15872 1 15871 15871 1984
>>> 1516 5534280704 15872 1 15871 15871 1984
>>> 1517 5537931264 15872 1 15871 15871 1984
>>> 1518 5541581824 15872 1 15871 15871 1984
>>> 1519 5545232384 15872 1 15871 15871 1984
>>> 1520 5548882944 15872 1 15871 15871 1984
>>> 1521 5552533504 15872 1 15871 15871 1984
>>> 1522 5556184064 15872 1 15871 15871 1984
>>>
>>> ... all following group chains are similarly structured up to #73 which
>>> looks as follows:
>>>
>>> Group Chain: 73 Parent Inode: 13 Generation: 1172963971
>>> CRC32: 00000000 ECC: 0000
>>> ## Block# Total Used Free Contig Size
>>> 0 2583263232 15872 5341 10531 5153 1984
>>> 1 4543613952 15872 5329 10543 5119 1984
>>> 2 4532662272 15872 10753 5119 5119 1984
>>> 3 4539963392 15872 3223 12649 7530 1984
>>> 4 4536312832 15872 5219 10653 5534 1984
>>> 5 4529011712 15872 6047 9825 3359 1984
>>> 6 4525361152 15872 4475 11397 5809 1984
>>> 7 4521710592 15872 3182 12690 5844 1984
>>> 8 4518060032 15872 5881 9991 5131 1984
>>> 9 4236966912 15872 10753 5119 5119 1984
>>> ...
>>> 2059651 4299026432 15872 4334 11538 4816 1984
>>> 2059652 4087293952 15872 7003 8869 2166 1984
>>> 2059653 4295375872 15872 6626 9246 5119 1984
>>> 2059654 4288074752 15872 509 15363 9662 1984
>>> 2059655 4291725312 15872 6151 9721 5119 1984
>>> 2059656 4284424192 15872 10052 5820 5119 1984
>>> 2059657 4277123072 15872 7383 8489 5120 1984
>>> 2059658 4273472512 15872 14 15858 5655 1984
>>> 2059659 4269821952 15872 2637 13235 7060 1984
>>> 2059660 4266171392 15872 10758 5114 3674 1984
>>> ...
>>>
>>> Assuming this would go on forever I stopped debugfs.ocfs2.
>>>
>>> With debugs.ocfs2 from ocfs2-tools 1.8.4 I get an identical result.
>>>
>>> Please let me know if I can provide any further information and help to
>>> fix this issue.
>>>
>>> Thanks again + Best regards ... Michael
>>>
>>> On 03/24/2016 01:30 AM, Joseph Qi wrote:
>>>> Hi Michael,
>>>> Could you please use debugfs to check the output?
>>>> # debugfs.ocfs2 -R 'stat //global_bitmap' <device>
>>>>
>>>> Thanks,
>>>> Joseph
>>>>
>>>> On 2016/3/24 6:38, Michael Ulbrich wrote:
>>>>> Hi ocfs2-users,
>>>>>
>>>>> my first post to this list from yesterday probably didn't get through.
>>>>>
>>>>> Anyway, I've made some progress in the meantime and may now ask more
>>>>> specific questions ...
>>>>>
>>>>> I'm having issues with an 11 TB ocfs2 shared filesystem on Debian Wheezy:
>>>>>
>>>>> Linux s1a 3.2.0-4-amd64 #1 SMP Debian 3.2.54-2 x86_64 GNU/Linux
>>>>>
>>>>> the kernel modules are:
>>>>>
>>>>> modinfo ocfs2 -> version: 1.5.0
>>>>>
>>>>> using stock ocfs2-tools 1.6.4-1+deb7u1 from the distri.
>>>>>
>>>>> As an alternative I cloned and built the latest ocfs2-tools from
>>>>> markfasheh's ocfs2-tools on github which should be version 1.8.4.
>>>>>
>>>>> The filesystem runs on top of drbd, is used to roughly 40 % and suffers
>>>>> from read-only remounts and hanging clients since the last reboot. This
>>>>> may be DLM problems but I suspect they stem from some corrupt disk
>>>>> structures. Before that it all ran stable for months.
>>>>>
>>>>> This situation made me want to run fsck.ocfs2 and now I wonder how to do
>>>>> that. The filesystem is not mounted.
>>>>>
>>>>> With the stock ocfs-tools 1.6.4:
>>>>>
>>>>> root at s1a:~# fsck.ocfs2 -v -f /dev/drbd1 > fsck_drbd1.log 2>&1
>>>>> fsck.ocfs2 1.6.4
>>>>> Checking OCFS2 filesystem in /dev/drbd1:
>>>>> Label: ocfs2_ASSET
>>>>> UUID: 6A1A0189A3F94E32B6B9A526DF9060F3
>>>>> Number of blocks: 5557283182
>>>>> Block size: 2048
>>>>> Number of clusters: 2778641591
>>>>> Cluster size: 4096
>>>>> Number of slots: 16
>>>>>
>>>>> I'm checking fsck_drbd1.log and find that it is making progress in
>>>>>
>>>>> Pass 0a: Checking cluster allocation chains
>>>>>
>>>>> until it reaches "chain 73" and goes into an infinite loop filling the
>>>>> logfile with breathtaking speed.
>>>>>
>>>>> With the newly built ocfs-tools 1.8.4 I get:
>>>>>
>>>>> root at s1a:~# fsck.ocfs2 -v -f /dev/drbd1 > fsck_drbd1.log 2>&1
>>>>> fsck.ocfs2 1.8.4
>>>>> Checking OCFS2 filesystem in /dev/drbd1:
>>>>> Label: ocfs2_ASSET
>>>>> UUID: 6A1A0189A3F94E32B6B9A526DF9060F3
>>>>> Number of blocks: 5557283182
>>>>> Block size: 2048
>>>>> Number of clusters: 2778641591
>>>>> Cluster size: 4096
>>>>> Number of slots: 16
>>>>>
>>>>> Again watching the verbose output in fsck_drbd1.log I find that this
>>>>> time it proceeds up to
>>>>>
>>>>> Pass 0a: Checking cluster allocation chains
>>>>> o2fsck_pass0:1360 | found inode alloc 13 at block 13
>>>>>
>>>>> and stays there without any further progress. I've terminated this
>>>>> process after waiting for more than an hour.
>>>>>
>>>>> Now - I'm lost somehow ... and would very much appreciate if anybody on
>>>>> this list would share his knowledge and give me a hint what to do next.
>>>>>
>>>>> What could be done to get this file system checked and repaired? Am I
>>>>> missing something important or do I just have to wait a little bit
>>>>> longer? Is there a version of ocfs2-tools / fsck.ocfs2 which will
>>>>> perform as expected?
>>>>>
>>>>> I'm prepared to upgrade the kernel to 3.16.0-0.bpo.4-amd64 but shy away
>>>>> from taking that risk without any clue of whether that might solve my
>>>>> problem ...
>>>>>
>>>>> Thanks in advance ... Michael Ulbrich
>>>>>
>>>>> _______________________________________________
>>>>> Ocfs2-users mailing list
>>>>> Ocfs2-users at oss.oracle.com
>>>>> https://oss.oracle.com/mailman/listinfo/ocfs2-users
>>>>>
>>>>>
>>>>
>>>>
>>>>
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>>>> https://oss.oracle.com/mailman/listinfo/ocfs2-users
>>>>
>>>
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>>
>>
>
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