[PATCH] nvme: add namespace paths links

[Hannes Reinecke]

On 4/25/22 15:54, Karel Zak wrote:
> On Tue, Apr 05, 2022 at 07:48:36AM +0200, Christoph Hellwig wrote:
>> On Tue, Apr 05, 2022 at 07:46:40AM +0200, Hannes Reinecke wrote:
>>> On 4/5/22 07:42, Christoph Hellwig wrote:
>>>> On Fri, Apr 01, 2022 at 11:28:55AM +0200, Hannes Reinecke wrote:
>>>>> It is really annoying to always have to loop through the entire
>>>>> /sys/block directory just to find the namespace path links for
>>>>> a single namespace in libnvme/nvme-cli.
>>>>> So provide links to the namespace paths for efficient lookup.
>>>>
>>>> I think having some form of links would be useful.  Quite a while ago
>>>> Thadeu looked into adding some form of relationship for lsblk and
>>>> friends.  Maybe it would be good to sync up and make sure whatever
>>>> links we are adding would be useful for all users?
>>>>
>>> Care to elaborate?
>>> Using the block device name is the most straightforward way here; we don't
>>> have a good enumeration to leverage as the paths are essentially just a
>>> linked list.
>>>
>>> We sure can have a subdirectory 'paths', and stick the links in there.
>>> If that helps with lsblk ...
>>
>> I personally don't care.  But I've added Thadeu and the util-linux list
>> to get everyone on board.
>   
> lsblk internally can accept arbitrary relations between devices
> (and libsmartcols can display it). If you introduce something new or
> extend the current holders/slaves, it will probably be accessible for
> lsblk to use it.
> 
Christoph, ping?

Shall I resend the patch or can you pick it up directly?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		           Kernel Storage Architect
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