[Bug 1092715] Re: udevadm trigger --action=change not working since quantal?

[Serge Hallyn]

** No longer affects: udev (Ubuntu)

** Tags added: bot-stop-nagging

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

** Changed in: linux (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.

** Summary changed:

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

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

Title:
  chown does not update acls if there are >1 user acls (in quantal)

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  ==== 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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