[Ocfs2-devel] A question on OCFS2 mount

[Joseph Qi]

It supports that a device can be mounted multiple times.

Actually it is a general feature of linux filesystems.

Thanks,

Joseph


On 16/11/19 16:32, Gechangwei wrote:
> On 2016年08月31日 18:59, Gechangwei wrote:
>>
>> Hi,
>>
>> I am asking for your help on OCFS2 again.
>>
>> I can’t figure out a segment of code.
>>
>> In the function dlm_register_domain which is called during mount 
>> procedure, below code stays:
>>
>>          dlm = __dlm_lookup_domain(domain);
>>
>>          if (dlm) {
>>
>>                    if (dlm->dlm_state != DLM_CTXT_JOINED) {
>>
>> spin_unlock(&dlm_domain_lock);
>>
>> mlog(ML_ERROR, "fence: dlm(%s) is not joined yet.\n", dlm->name);
>>
>> mlog(0, "This ctxt is not joined yet!\n");
>>
>> wait_event_interruptible(dlm_domain_events,
>>
>> dlm_wait_on_domain_helper(
>>
>> domain));
>>
>> goto retry;
>>
>>                    }
>>
>> I can see that it wants to look up an existed DLM context object 
>> which matches file system’s UUID.
>>
>> According to my comprehension, DLM context object must be detached 
>> from the DLM domain’s list and released when dismount.
>>
>> So it’s weird that such a DLM context object can be found at the 
>> procedure of MOUNT.
>>
>> Could you please provide a clue for me, if convenient?
>>
>>  how are u
>>
>> Many thanks!
>>
>> BR.
>>
>> Changwei.
>>
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