[Bug 1635729] Re: bcache won't start on boot due to exotic block devices filtered in udev rules

[Kai Kasurinen]

** Package changed: udev (Ubuntu) => systemd (Ubuntu)

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1635729

Title:
  bcache won't start on boot due to exotic block devices filtered in
  udev rules

Status in systemd package in Ubuntu:
  New

Bug description:
  If a bcache is created with a Curtis-Wright NVRAM card as caching
  device, the bcache device will not show up on boot without manual
  intervention.

  Tracking this down show this being due to the fact, that line 9 of
  /lib/udev/rules.d/60-persistent-storage.rules filters on a whitelist
  of devices
  (loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*),
  that doesn't include the NVRAM devices (umem*). A few steps later,
  this results in bcache_register() not being called.

  Trivially patching

  -KERNEL!="loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*", GOTO="persistent_storage_end"
  +KERNEL!="loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*|umem*", GOTO="persistent_storage_end"

  resolves the issue.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1635729/+subscriptions