bcache-tools udev rules on trusty lacking util-linux 2.24+ workaround

[JuanJo Ciarlante]

We're using bcache under trusty HWE kernel (3.16.0-38-generic)
with bcache-tools 1.0.7-0ubuntu1 (built from src).

As trusty has util-linux 2.20.1, udev rules for auto registering
bcache devices are skipped:

 # blkid was run by the standard udev rules
 # It recognised bcache (util-linux 2.24+)
 ENV{ID_FS_TYPE}=="bcache", GOTO="bcache_backing_found"

We're manually cowboy'ing the following line alongside above:
 KERNEL=="nvme*", GOTO="bcache_backing_found"

, but it would be great if something like trying bcache-register
on non rotational devices were added to the udev rules:

 ENV{DEVTYPE}=="disk", ATTR{queue/rotational}=="0", GOTO="bcache_backing_found"

[Ryan Harper (raharper)]

What scenario are you finding that bcache devices aren't auto registered?

[Launchpad Janitor (janitor)]

[Expired for bcache-tools (Ubuntu) because there has been no activity for 60 days.]