RHBA-2013:1632 - Bug Fix Advisory

Topic

Updated sanlock packages that fix several bugs and add various enhancements are
now available for Red Hat Enterprise Linux 6.

Description

The sanlock packages provide a shared storage lock manager. Hosts with shared
access to a block device or a file can use sanlock to synchronize their
activities. VDSM and libvirt use sanlock to synchronize access to virtual
machine images.

The sanlock packages have been upgraded to upstream version 2.8, which provides
a number of bug fixes and enhancements over the previous version, including a
new API provided for applications to request the release of a resource.
(BZ#960989)

This update fixes the following bug:

• Previously, the wdmd daemon did not always select the functional device when

some watchdog modules provided two devices. Consequently, wdmd did not work
correctly in some instances. A patch has been applied to address this bug, and
wdmd now verifies the state of both devices and selects the one that works
properly. (BZ#961032)

In addition, this update adds the following enhancements:

• With this update, a new API has been provided for applications to verify the

status of hosts in a lockspace. (BZ#960993)

• With this update, a new API has been provided for applications to check the

status of hosts that are holding a resource lease. (BZ#966088)

Users of sanlock are advised to upgrade to these updated packages, which fix
these bugs and add these enhancements.

Solution

Before applying this update, make sure all previously released errata relevant
to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red
Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Virtualization 3 for RHEL 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64

Fixes

• BZ - 960989 - [sanlock] Provide a command to request the release of a resource currently held by another host/pid
• BZ - 960993 - [sanlock] Monitor and report the lockspace hosts liveness
• BZ - 961032 - [sanlock] wdmd should select correct watchdog device
• BZ - 966088 - [sanlock] Return information about the current owner(s) of a resource

CVEs

(none)

References

(none)