RHBA-2015:0428 - Bug Fix Advisory

Topic

Updated gfs2-utils packages that fix several bugs and add various enhancements
are now available for Red Hat Enterprise Linux 7.

Description

The gfs2-utils packages contain utilities for creating, checking, modifying, and
correcting any inconsistencies in GFS2 file systems.

The gfs2-utils packages have been upgraded to upstream version 3.1.7, which
provides a number of bug fixes and enhancements over the previous version
including:

• The fsck.gfs2 utility now issues read-ahead requests when scanning bitmaps

for inodes and reading files. The fsck.gfs2 performance has been improved by
reading on-disk data into memory before it is used.

• The gfs2_edit utility now prints journal revoke continuation records as

part of its journal printing function, which provides more data for debugging.

• The mkfs.gfs2 utility now allocates and writes resource groups and journal

blocks in-order, reducing file system creation time. When the journal size is
larger than the resource group size, the initial resource groups are sized to
accommodate contiguous journals.

• The fsck.gfs2 utility did not adequately check the journal file contents

before replaying them. If a file system had a corrupted journal, replaying the
journal could cause file system damage. This update modified fsck.gfs2 to
validate the entire journal before replaying it. The corrupt journal is now
rebuilt.

• This update also includes timing and logging instrumentation in order to

help debug and monitor performance changes in fsck.gfs2. Handling of journal
indirect block corruption has also been improved.

(BZ#1112342, BZ#1038312, BZ#1107238, BZ#114616, BZ#1075135)

This update also fixes the following bugs:

• The libgfs2 library used the same gfs2_sb structure for both gfs1 and gfs2

file systems. Certain fields were omitted, and libgfs2 did not properly update
the modified superblock on a gfs1 file system. The gfs2_convert command
therefore terminated unexpectedly with a segmentation fault. The aforementioned
values are no longer omitted, thus preventing the segmentation fault.
Additionally, gfs2_convert attempts to fix erroneous values for these fields by
calculating the correct values where possible and using these corrected values
instead. (BZ#1079507)

• The gfs2_grow utility made assumptions about the existing resource group size

which were no longer valid after recent mkfs.gfs2 changes. The utility could
create resource groups which were too small and unaligned, which negatively
impacted file system efficiency. With this update, gfs2_grow was modified to use
the new resource group placement and alignment strategy, thus fixing this bug.
(BZ#1017381)

• The fsck.gfs2 utility did not take days into consideration when reporting the

time taken for each pass to complete. In cases where large file systems caused
fsck.gfs2 to run longer than a day, fsck.gfs2 reported shorter pass durations
than the time really taken. The pass duration reporting code in fsck.gfs2 has
been updated to take durations over 24 hours into account, and fsck.gfs2 now
reports the pass durations correctly. (BZ#1154786)

• The default resource group size was set to the maximum in the mkfs.gfs2

utility, which could have affected the file system performance. The default
resource group size has been set to the original value, thus preventing the
performance problems. (BZ#1162817)

• A bug in the gfs2_convert utility could introduce bogus values for the

di_goal_meta field of the ondisk inode. This affected block allocation in gfs2,
which in certain versions caused a EBADSLT error on affected inodes. With this
update, gfs2_convert now fixes these incorrect values. Also, fsck.gfs2 is now
able identify and fix incorrect inode goal values. (BZ#1178604)

Users of gfs2-utils 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.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux Server - AUS 7.7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.6 x86_64
• Red Hat Enterprise Linux Server - AUS 7.4 x86_64
• Red Hat Enterprise Linux Server - AUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.3 s390x
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux Server from RHUI 7 x86_64
• Red Hat Enterprise Linux Server - TUS 7.7 x86_64
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux Server - TUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux EUS Compute Node 7.7 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.5 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.4 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.3 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.3 x86_64

Fixes

• BZ - 1017381 - gfs2_grow uses wrong resource group size
• BZ - 1107238 - gfs2_edit: print revoke continuation records for journals
• BZ - 1146160 - fsck.gfs2 replaying unsafe journals
• BZ - 1154786 - fsck.gfs2 should include days in pass duration
• BZ - 1162817 - mkfs.gfs2 should use a smaller default rgrp size for RHEL7.1

CVEs

(none)

References

(none)