Re: discuss about commit 3b0f9ce: filter-mpath: get wwids from sysfs vpd_pg83

On 11/13/23 12:52, Martin Wilck wrote:
> I can't stress enough that this is *the only mechanism* that works
> correctly. udev serves as central hub to retrieve device properties
> from, and this is how it ought to be.

Indeed, that was exactly one of the primary reasons the
'external_device_info_source="udev"' was added. Reimplementing other
subsystem's logic is wrong because there's always some intrinsic logic
there that may be omitted. Sooner or later, such approach will fail.

I agree with you here.

If not sharing information through udev due to various kinds of hatred
about this part of the system, then alternatively, at least, calling a
multipath library function from LVM to do the job.

-- 
Peter