[Ocfs2-devel] File system is read-only review

[Gang He]

Hello Joseph and Jiufei,

I got a customer issue, ocfs2: filesystem goes read-only after node restart.
The symptom is very similar with this bug, when the ocfs2 file system called ocfs2_recover_orphans() during mounting period, 
Then, encountered this issue, the stack likes,
Mar 10 17:45:11 mipkhpch2bl07 kernel: [   81.689531] ocfs2: Mounting device (253,1) on (node 1770803, slot 0) with writeback data mode.
Mar 10 17:45:11 mipkhpch2bl07 kernel: [   81.695279] OCFS2: ERROR (device dm-1): ocfs2_commit_truncate: Inode 1075718 has empty extent block at 1075718
Mar 10 17:45:11 mipkhpch2bl07 kernel: [   81.695283]
Mar 10 17:45:11 mipkhpch2bl07 kernel: [   81.695287] File system is now read-only due to the potential of on-disk corruption. Please run fsck.ocfs2 once the file system is unmounted.
Mar 10 17:45:11 mipkhpch2bl07 kernel: [   81.695297] (kworker/u:36,913,16):ocfs2_truncate_for_delete:585 ERROR: status = -30
Mar 10 17:45:11 mipkhpch2bl07 kernel: [   81.695302] (kworker/u:36,913,16):ocfs2_wipe_inode:754 ERROR: status = -30
Mar 10 17:45:11 mipkhpch2bl07 kernel: [   81.695308] (kworker/u:36,913,16):ocfs2_delete_inode:1039 ERROR: status = -30

I saw your mails, Jiufei ever tried to fix this bug, but these three patches were not all accepted by Linux git tree.
Then, I want to know what is this bug's final status? 
Second, as you said, misusing jbd2_journal_restart() possibly results in this issue, by now, which patch can fix this misusing?
Finally, if the customers have hit this case (very bad, start ocfs2 file system and get read-only), 
how to get the file system back? unmount the file system and run fsck.ocfs2, or patch the kernel code and bypass this logic(which patch can do this?). 
 

Thanks
Gang 



>>> 
> Hi Guanghui,
> Misusing jbd2_journal_restart() may cause this issue.
> You can find details and patches we sent before.
> 
> ocfs2: fix some inconsistency problems caused by jbd2_journal_restart()
> https://oss.oracle.com/pipermail/ocfs2-devel/2015-April/010768.html 
> 
> On 2015/11/20 19:00, Zhangguanghui wrote:
>> 
>> File system is read-only when deleting the inode, So I try fsck.ocfs2 -f and 
> success,
>> Anybody ever see this, how to avoid this, Thanks 
>> 
>> Nov 18 11:04:30 cvk110 kernel: [144411.362978] OCFS2: ERROR (device dm-2): 
> ocfs2_commit_truncate: Inode 24772873 has empty extent block at 24772873
>> Nov 18 11:04:30 cvk110 kernel: [144411.362978]
>> Nov 18 11:04:30 cvk110 kernel: [144411.362986] File system is now read-only 
> due to the potential of on-disk corruption. Please run fsck.ocfs2 once the 
> file system is unmounted.
>> Nov 18 11:04:30 cvk110 kernel: [144411.362991] 
> (kworker/u129:0,32928,0):ocfs2_truncate_for_delete:574 ERROR: status = -30
>> Nov 18 11:04:30 cvk110 kernel: [144411.362993] 
> (kworker/u129:0,32928,0):ocfs2_wipe_inode:743 ERROR: status = -30
>> Nov 18 11:04:30 cvk110 kernel: [144411.362996] 
> (kworker/u129:0,32928,0):ocfs2_delete_inode:1022 ERROR: status = -30
>> Nov 18 11:04:30 cvk110 kernel: [144411.434249] OCFS2: ERROR (device dm-2): 
> ocfs2_commit_truncate: Inode 1445125 has empty extent block at 1445125
>> Nov 18 11:04:30 cvk110 kernel: [144411.434249]
>> Nov 18 11:04:30 cvk110 kernel: [144411.434256] 
> (kworker/u129:0,32928,1):ocfs2_truncate_for_delete:574 ERROR: status = -30
>> Nov 18 11:04:30 cvk110 kernel: [144411.434258] 
> (kworker/u129:0,32928,1):ocfs2_wipe_inode:743 ERROR: status = -30
>> Nov 18 11:04:30 cvk110 kernel: [144411.434261] 
> (kworker/u129:0,32928,1):ocfs2_delete_inode:1022 ERROR: status = -30
>> 
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>> zhangguanghui
>> 
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