Description of problem:
udev is now taking in account the MODE definitions that we use in 12-vdsm-lvm.rules (MODE:="0600").
I suppose that previously this wasn't working (I also verified it on older versions):

$ grep FIXME vdsm/storage/12-vdsm-lvm.rules
# FIXME: make special lvs vdsm-only readable (MODE doesn't work)

Therefore the ids/leases LVs are now reachable only by the vdsm user:

# ls -l /dev/dm-23 
brw------- 1 vdsm qemu 253, 23 Aug 21 16:57 /dev/dm-23

This denies the access to such LVs to sanlock:

Thread-2192::ERROR::2012-08-21 17:01:11,169::task::833::TaskManager.Task::(_setError) Task=`7cfe39d3-6a6e-45f4-a2c3-a6ec52fa7209`::Unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/task.py", line 840, in _run
    return fn(*args, **kargs)
  File "/usr/share/vdsm/logUtils.py", line 38, in wrapper
    res = f(*args, **kwargs)
  File "/usr/share/vdsm/storage/hsm.py", line 785, in createStoragePool
    return sp.StoragePool(spUUID, self.taskMng).create(poolName, masterDom, domList, masterVersion, safeLease)
  File "/usr/share/vdsm/storage/sp.py", line 565, in create
    self._acquireTemporaryClusterLock(msdUUID, safeLease)
  File "/usr/share/vdsm/storage/sp.py", line 506, in _acquireTemporaryClusterLock
    msd.acquireHostId(self.id)
  File "/usr/share/vdsm/storage/sd.py", line 427, in acquireHostId
    self._clusterLock.acquireHostId(hostId, async)
  File "/usr/share/vdsm/storage/safelease.py", line 175, in acquireHostId
    raise se.AcquireHostIdFailure(self._sdUUID, e)
AcquireHostIdFailure: Cannot acquire host id: ('df0acb48-5d97-4878-93b5-6a26ba2ae971', SanlockException(19, 'Sanlock lockspace add failure', 'No such device'))

2012-08-21 16:57:27+0300 3360 [1442]: s5 lockspace df0acb48-5d97-4878-93b5-6a26ba2ae971:250:/dev/df0acb48-5d97-4878-93b5-6a26ba2ae971/ids:0
2012-08-21 16:57:27+0300 3360 [5259]: open error -13 /dev/df0acb48-5d97-4878-93b5-6a26ba2ae971/ids
2012-08-21 16:57:27+0300 3360 [5259]: s5 open_disk /dev/df0acb48-5d97-4878-93b5-6a26ba2ae971/ids error -13
2012-08-21 17:01:10+0300 3583 [1440]: s6 lockspace df0acb48-5d97-4878-93b5-6a26ba2ae971:250:/dev/df0acb48-5d97-4878-93b5-6a26ba2ae971/ids:0
2012-08-21 17:01:10+0300 3583 [5566]: open error -13 /dev/df0acb48-5d97-4878-93b5-6a26ba2ae971/ids
2012-08-21 17:01:10+0300 3583 [5566]: s6 open_disk /dev/df0acb48-5d97-4878-93b5-6a26ba2ae971/ids error -13


Version-Release number of selected component (if applicable):
udev-182-3.fc17.x86_64