Issued:

2013-01-07

Updated:

2013-01-07

RHBA-2013:0080 - device-mapper-multipath bug fix and enhancement update

Synopsis

device-mapper-multipath bug fix and enhancement update

Type/Severity

Bug Fix Advisory (none)

Topic

Updated device-mapper-multipath packages that fix numerous bugs and add several enhancements are now available for Red Hat Enterprise Linux 5.

Description

The device-mapper-multipath packages provide the tools for managing multipath devices.

Bug fixes:

• The multipathd daemon ignored all subdirectories in /var/lib/ when deciding which file systems to unmount. Now, the only subdirectory of /var/lib/ that multipathd does not unmount is /var/lib/multipath/. Also, multipathd now unmounts all unnecessary file systems before mounting the ramfs on the /tmp/, /bin/, and /sbin/ directories. (BZ#833193)

• If initrd was not rebuilt when a new storage device was added to the system, the new device could have been assigned a user_friendly_names value already assigned to another device, and the device stopped working correctly. multipathd now accepts the -B option, which makes the user_friendly_names bindings file read-only. When started with the -B option, multipath devices without a binding to a user_friendly_names use their World Wide Identifier (WWID). (BZ#769990)

• The multipathd daemon failed to unmount some file systems because the daemon was deleting unnecessary file systems while reading through the list of mounted file systems. Consequently, Multipath could have missed the deleted file systems. The multipathd daemon now reads through all file systems first and creates a list of the file systems to unmount, which are then unmounted based on this list. (BZ#803849)

• The multipathd daemon incorrectly returned exit code 1 when called with the -h option. The deamon now returns exit code 0 when called with the -h option. (BZ#771571)

• The multipathd daemon did not always flush the log buffer if it failed during start-up and error messages logged during start-up could be lost. multipathd now always flushes the log buffer on failures and error messages are logged correctly if multipathd terminates unexpectedly during start-up. (BZ#783522)

• The multipath priority callout programs did not work correctly with CCISS (Compaq Command Interface for SCSI-3 Support) devices because multipath could not convert the ! character in a CCISS sysfs name to the / character in the CCISS device name. Consequently, callout programs failed to set path priorities for these devices. The code has been modified and Multipath now supports the "%c" wildcard for callout functions and the CCISS names are converted correctly. (BZ#781480)

Enhancements:

• This update adds the default configuration for HP P2000 G3 MSA Smart Array Systems. (BZ#742906)

• Multiple default settings and parameters have been enhanced:

  • The multipathd daemon did not set the max_fds option and the user had to manually set the max_fds option in multipath.conf.
  • Multipath did not disable queuing when it stopped: when multipathd stopped on node shutdown, if a multipath device had no working paths and was set to queue_if_no_path, the device queued outstanding IO forever, rendering the machine unresponsive.
  • The user_friendly_names option was only configurable in the defaults section and users could not override its value in their device-specific configurations.
  • A path group with many secondary paths could be used instead of the path group with the primary path by default. This happened because Multipath set the priority of path groups to the sum of their path priorities and used the path group with the primary path instead of using a path group with many secondary paths.

Device Mapper Multipath now sets max_fds to the system maximum, queue_if_no_daemon to the "no", and pg_prio_calc to "average" by default. The user_friendly_names property can be configured in the devices section of multipath.conf. (BZ#744231)

• Configuration for Fujitsu ETERNUS storage systems has been added. (BZ#788965)

• The built-in configuration for NetApp LUNs has been updated to use the tur path checker by default and multiple hardware table parameters have been updated.(BZ#799847)

Users of device-mapper-multipath 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/knowledge/articles/11258

Affected Products

Updated Packages

• device-mapper-multipath-0.4.7-54.el5.s390x.rpm
• device-mapper-multipath-debuginfo-0.4.7-54.el5.i386.rpm
• device-mapper-multipath-0.4.7-54.el5.ppc.rpm
• kpartx-0.4.7-54.el5.x86_64.rpm
• device-mapper-multipath-debuginfo-0.4.7-54.el5.ia64.rpm
• device-mapper-multipath-0.4.7-54.el5.src.rpm
• device-mapper-multipath-debuginfo-0.4.7-54.el5.x86_64.rpm
• kpartx-0.4.7-54.el5.ia64.rpm
• device-mapper-multipath-debuginfo-0.4.7-54.el5.ppc.rpm
• device-mapper-multipath-0.4.7-54.el5.ia64.rpm
• kpartx-0.4.7-54.el5.s390x.rpm
• device-mapper-multipath-0.4.7-54.el5.i386.rpm
• device-mapper-multipath-debuginfo-0.4.7-54.el5.s390x.rpm
• kpartx-0.4.7-54.el5.i386.rpm
• kpartx-0.4.7-54.el5.ppc.rpm
• device-mapper-multipath-0.4.7-54.el5.x86_64.rpm

Fixes

• This content is not included.BZ - 644989
• This content is not included.BZ - 747180

CVEs

(none)

References

(none)

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.