[PATCH] nvme: add namespace paths links

[Christoph Hellwig]

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.