Re: [PATCH blktests v2 3/3] Add tests for the SRP initiator and target drivers

Omar Sandoval
2018-07-06T21:21:46Z

On Wed, Jul 04, 2018 at 04:24:42PM +0000, Bart Van Assche wrote:
> On Tue, 2018-07-03 at 14:39 -0700, Omar Sandoval wrote:
> > Alright, I installed multipath-tools from source and the segfaults are
> > gone, but I still don't get these symlinks. Instead, they show up as
> >
> > /dev/disk/by-id/scsi-3600140572616d6469736b32000000000
> >
> > Any ideas?
>
> Hello Omar,
>
> The dm-uuid symlink is created by a udev rule. Apparently that udev rule is not
> in the same software package as multipathd. Can you run the following command to
> check whether that udev rule is available on your setup?
>
> grep -r dm-uuid /lib/udev/rules.d/

$ grep -r dm-uuid /lib/udev/rules.d/
/lib/udev/rules.d/13-dm-disk.rules:ENV{DM_UUID}=="?*", SYMLINK+="disk/by-id/dm-uuid-$env{DM_UUID}"

> The name of the package that includes the dm-uuid rule depends on the distro,
> e.g. dmsetup or device-mapper. According to the git history of git repository
> https://sourceware.org/git/?p=lvm2.git the dm-uuid udev rule was added to that
> repository in August 2009, almost nine years ago.

Yup, it's in the device-mapper package for me on Arch Linux (and Arch
has very up-to-date versions of everything). I'll try some udev
debugging.