Re: nvmetcli: Unable to run clear/restore

[Sagi Grimberg <sagi@grimberg.me>]

>> While experimenting with nvmetcli I'm unable to run clear or restore.
>>
>> Using master branch against Fedora 31, 5.5.9-200.fc31.x86_64
>>
>> # ./nvmetcli clear
>> Traceback (most recent call last):
>>    File "./nvmetcli", line 740, in <module>
>>      main()
>>    File "./nvmetcli", line 722, in main
>>      funcs[sys.argv[1]](savefile)
>>    File "./nvmetcli", line 689, in clear
>>      nvme.Root().clear_existing()
>>    File "/root/projects/nvmetcli/nvmet/nvme.py", line 315, in clear_existing
>>      p.delete()
>>    File "/root/projects/nvmetcli/nvmet/nvme.py", line 677, in delete
>>      a.delete()
>>    File "/root/projects/nvmetcli/nvmet/nvme.py", line 200, in delete
>>      os.rmdir(self.path)
>> PermissionError: [Errno 1] Operation not permitted:
>> '/sys/kernel/config/nvmet/ports/0/ana_groups/1'
> 
> Apparently if I simply do
> 
> # rmdir /sys/kernel/config/nvmet/ports/1
> 
> The port and associated ana group gets removed and the usage count for
> the kernel module nvmet goes to zero.
> 
> Is the bug that we are trying to remove
> /sys/kernel/config/nvmet/ports/0/ana_groups/1 in userspace from nvmetcli
> which can simply be corrected with
> 
> diff --git a/nvmet/nvme.py b/nvmet/nvme.py
> index 089bafb..a2565e4 100644
> --- a/nvmet/nvme.py
> +++ b/nvmet/nvme.py
> @@ -686,8 +686,6 @@ class Port(CFSNode):
>           self._check_self()
>           for s in self.subsystems:
>               self.remove_subsystem(s)
> -        for a in self.ana_groups:
> -            a.delete()
> 
> 
> or that we should be able to remove it and can't, thus the issue is in
> the kernel?

IIRC that this is an issue that Hannes was aiming to address?

Hannes?

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