1.31. e2fsprogs

1.31.1. RHBA-2011:1080: e2fsprogs bug fix and enhancement update

An updated e2fsprogs packages that fix several bugs and add various enhancements are now available for Red Hat Enterprise Linux 5.


This update was released as errata RHBA-2011:1080 — e2fsprogs bug fix and enhancement update.
The e2fsprogs packages contain a number of utilities that create, check, modify, and correct inconsistencies in ext2, ext3, and ext4 file systems. This includes e2fsck (which repairs file system inconsistencies after an unclean shutdown), mke2fs (which initializes a partition to contain an empty file system), tune2fs (which modifies file system parameters), and most of the other core file system utilities.

Bug Fixes:

When lsattr or chattr was pointed at a non-existent file, an error was returned in that the exit code was always zero. This was because ls reported an error if any occurred, and lsattr did the same, reporting the last error encountered. This patch fixes this error, and lsattr and chattr provide the correct error.
After using resize2fs to perform an offline resize of a file system, running e2fsck gave an error, stating the wrong block count for the resize inode. This was because the resize inode was not being properly cleared. This patch checks to see if the file system has grown to the point where the resize_inode is no longer needed, then cleans it so e2fsck does not have to. The correct block count is now given for the resize inode.
Previously, e2fsprogs libblkid probe_all() could mismatch devices when scanning whole disks without partitions where the name ended in a number. This caused a mount failure. With this patch these disks are also scanned, so the devices are mounted correctly.
When a host was re-kickstarted, mpath mount with LABEL failed with the error “mount: /dev/sdk already mounted or /san/intf busy”. This was because the probe_one() function scanned /dev before /dev/mapper. This patch disables all calls from libdevmapper via #undef HAVE_DEVMAPPER, instead using the standard support for “normal” non-dm devices. This results in mpath can mount without errors.
Running “e2fsck -y -f” on a corrupted file system printed errors when “e2fsck -y” previous reported the file system to be cleaned of errors. This occurred when a file had its i_file_acl block cloned as a duplicate. This duplicate was then cleared because the file system did not have the xattr feature, and the inode was subsequently removed due to an invalid mode. The second e2fsck pass found the cloned xattr block in use but not owned by any file, so had to fix up the block bitmaps. This patch fixes an existing brace misalignment and skips the processing of the duplicate xattr blocks on a non-xattr file system, as these will be cleaned at a later point, allowing the clean to occur properly.
On 64-bit system, a sign extension bug in libcom_err caused incorrect error messages to be emitted. This was because an error code as an (int) was passed to error_message as an (unsigned int), especially when using libgssapi_krb5. This meant that error_message() failed to find a matching error table. To fix this, error_message() has been changed to follow the same method error_table_name() does when error_message() calls it. That is, it drops most of the higher bits of the parameter passed before continuing, so now correct error messages are emitted.
A sparse journal (which indicates corruption) was not fixed by e2fsck, causing file system errors and a shut down after mount. This was because e2fsck marked the file system as clean so it would mount, but did not fix that block, so when the journal reached this point again it failed once more. This patch changes process_journal_block() to clear and recreate the journal inode if it is sparse, that is if it gets block 0, allowing e2fsck to correctly fix a sparse journal.
Previously, chattr and lsattr would return “error code = 0” even when they have not done anything, which made error checking difficult in scripts. With this patch, if there are errors they will be reported with a non-zero exit code. It will give explicit errors when attempting to set files that are not files or directories (which are not currently supported under Linux). Also, the -f flag will suppress error messages from being printed even though the exit status will still be non-zero.
When checking a particular volume, e2fsck exited with a signal 11 (segmentation fault). This was caused by floating point errors. This patch edits get_icount_el to prevent point precision errors on large file systems from causing the search interpolation algorithm from performing an infinite loop, allowing e2fsck to check the volume correctly.
The fsck command returned a 0 status instead of an appropriate error code on an exec() failure, due to an error in the code. This patch fixes the error so that the appropriate error code is now returned.
Previously, blkid cachine caused a tag search (blkid -l -t ...) to return empty results. This occurred mostly in debug code, where dev->bid_type is not-NULL before dereferencing the pointer. This has been edited and blkid cachine now returns proper results.
Previously, e2fsprogs failed to build with newer gettext package. This was due to a problem in auto-fu. This patch fixes this allowing the packages to build correctly.
If more than 128 devices were specified on the blkid command line, the devices[] array overflowed, resulting in a crash. This patch avoids the problem by dynamically allocating the devices[] array based on the number of arguments, resulting in more than 128 devices being able to be specified on the blkid command line.
Running blkid on s390x caused a crash with a signal 11 (segmentation fault) error. This was due to an error in the code regarding floating points. This patch frees a pointer that was not initialized to null, allowing blkid to run correctly on s390x.
It was possible for the UUIDD to generate duplicate UIDs under certain circumstances. This occurred when the socket backlog in the UUIDD daemon was full, therefore the connection was refused and uuid_generate_time() fell back to unsafe ways of generating a UUID, resulting in the duplicates. Also, fcntle(2) did not work for the synchronization of threads belonging to the same process, contributing to the problem. This patch introduces a safe variant of uuid_generate_time() and fixes the locking of the clock state counter file which prevents UUIDD from generating duplicate UIDs.
Running e2fsck on a corrupted file system gave a “should never happen” error. This occurred when a directory with an htree index had an incorrect and too-large i_size field. This patch prevents e2fsck from crashing and prompts the user to remove the htree index so that it can be rebuilt after pass 3, allowing file systems with this error to be fixed.


When running blkid, stale mounts can occasionally be seen within the cache. While running blkid -c /dev/null gets around this, it can become a runtime issue when blkid is run against a machine with several hundred disks. As such this patch adds a garbage collection routine feature. This performs a garbage collection pass on the /etc/blkid.tab file by adding the -g option to the blkid program. The man page has also been updated with more information about what the -g garbage collection option does.
The mkfs reserved blocks were originally set to 5% by default, with a 1% step size. This was considered excessive for large file systems. With this patch, the reserved blocks amount now accepts a floating point for better accuracy when setting the percent. Also, mke2fs and tune2fs now accept a floating point number from the user to improve the level of accuracy offered.
All users are advised to upgrade to these updated packages, which resolve these issues and include these features.