[Bug 1092715] Re: chown does not update acls if there are >1 user acls (in quantal)

[Serge Hallyn]

Sorry, it seems my test was bad in raring.  chown does not clear the
acls anywhere, so udev needs to do it.  re-marking for udev.

** Summary changed:

- chown does not update acls if there are >1 user acls (in quantal)
+ udevadm trigger --action=change not working in quantal

** Also affects: udev (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: udev (Ubuntu)
       Status: New => Confirmed

** Changed in: udev (Ubuntu)
   Importance: Undecided => High

** Description changed:

- ==== Update ====
- Here is a simple reproducible testcase.  This break with both ext4 and xfs,
- but only on quantal.  On raring it works correctly.
- 
- touch xxx
- setfacl -m user:ubuntu:rw- xxx
- setfacl -m group::--- xxx
- getfacl xxx
- chmod g+rw xxx
- getfacl xxx
- 
- You'll see:
- # file: xxx
- # owner: serge
- # group: serge
- user::rw-
- user:serge:rw-
- group::---
- mask::rw-
- other::r--
- 
- In raring (and precise), the group acl gets update to be rw-.
- ================
- 
  For bug 1057024, we have qemu-kvm postinst call udevadm trigger
  --action=change.  This is to make udev recalculate permissions for
  /dev/kvm based on the new /lib/udev/rules.d/40-qemu-kvm.rules file.
  
  In precise, this causes /dev/kvm's acls to be correctly set so that
  group has rw permissions.
  
  In quantal, with the exact same rules file, it does not.  After a
  reboot, permissions are set correctly.  But manually running udevadm
  trigger --subsystem=misc --action=change (or variations of that) does
  not change the group acl.  It changes the group ownership, and part of
  the acl, but not the group acl.

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https://bugs.launchpad.net/bugs/1092715

Title:
  udevadm trigger --action=change not working in quantal

Status in “linux” package in Ubuntu:
  Confirmed
Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  For bug 1057024, we have qemu-kvm postinst call udevadm trigger
  --action=change.  This is to make udev recalculate permissions for
  /dev/kvm based on the new /lib/udev/rules.d/40-qemu-kvm.rules file.

  In precise, this causes /dev/kvm's acls to be correctly set so that
  group has rw permissions.

  In quantal, with the exact same rules file, it does not.  After a
  reboot, permissions are set correctly.  But manually running udevadm
  trigger --subsystem=misc --action=change (or variations of that) does
  not change the group acl.  It changes the group ownership, and part of
  the acl, but not the group acl.

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