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README 2012-03-28 5.1 kB 11 weekly downloads
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E2fsprogs 1.42.2 (March 27, 2012) ================================= The resize2fs program uses much less CPU and is much faster for very large file systems. (Addresses Debian Bug: #663237) The seti and freei commands in debugfs can now take an optional length argument to set and clear a contiguous range of inodes. E2fsck will now make explicit checks for the EOFBLOCKS_FL, since we plan to remove support for it from the kernel file system driver. It really wasn't very useful and was causing more problems than it solves. Since e2fsck will complain if inodes that should have EOFBLOCKS_FL do not have the flag set, we are going to remove this check from e2fsprogs first, and then only remove the flag from the kernel much later. The mke2fs program can now use direct I/O via "mke2fs -D". This will slow down the mke2fs, but it makes it more polite on a loaded server by limiting the amount of memory that gets dirtied by mke2fs when it is using buffered I/O. E2fsck was needlessly closing and re-opening the file system as a side effect of adding Multiple Mount Protection (MMP). This isn't necessary for non-MMP file systems, so drop it. Print errors returned by ext2fs_open2() and ext2fs_check_desc() so we can more easily diagnose memory allocation failures caused by insufficient memory. E2fsck will now abort if there are memory allocation failures when the file system is initially opened and during the block group descriptor checks. (Addresses Google Bug: #6208183) If there are incorrect block group checks, e2fsck will now report the incorrect and corrected checksum values. The e2fsck progam can now write log files containing the details of the problems that were found and fixed directly, via configuration parameters in /etc/e2fsck.conf. Added the ability to limit the number of messages reported by e2fsck for a given problem type. This avoids a potential bottleneck if there is a serial console which can cause a boot sequence to take a long time if e2fsck needs to report many, many file system errors. The dumpe2fs, debugfs, and tune2fs now use rbtree bitmaps, which cause them to use much less memory for large file systems. The dumpe2fs program will now print the expected block group checksum if it is incorrect. This helps to diagnose problems caused by incorrect block group checksums. E2fsck now checks for extents with a zero length, since the kernel will oops if it comes accross such a corrupted data structure. (See https://bugzilla.kernel.org/show_bug.cgi?id=42859) E2fsck has a number of bugs relating to discard that have been fixed. (1) Fixed a bug which could cause e2fsck to discard portions of the inode table which were actually in use. (2) E2fsck will now avoid using discard if the block device doesn't zero data on discard, since otherwise this could cause problems if the file system gets corrupted in the future. (3) E2fsck will now avoid using discard when it is run in read-only mode. (4) Fixed a bug which caused e2fsck to not issue discards in the last block group. E2fsck's CPU utilization in pass 5 has been optimized, which will speed up e2fsck slightly. E2image will now skip copying uninitialized bitmap and inode table blocks. Fixed mke2fs -S so it does not corrupt the first block group's information. E2fsck will now check the new sysfs interface to determine if we are using the battery or AC mains. (Addresses SourceForge Bug: #3439277) Updated/fixed various man pages. (Addresses Debian Bug: #665427) Fixed various Debian Packaging issues. (Addresses Debian Bug: #665885) Programmer's Notes ------------------ Fixed various portability issues for non-Linux systems, particularly MacOS X, as well as Linux systems running with the just-released glibc 2.15. Fix file descriptor leak in ext2fs_close() if the file system with uninit_bg is opened read/only with a backup superblock. (Addresses SourceForge Bug: #3444351) Fixed an invalid return in a non-void function in the quota code. (Addresses SourceForge Bug: #3468423) Fixed the debian rules file so that the calls to dpkg-buildflags works when the shell is dash. The debian package build now uses V=1 so that there is more information about potential build failures in debian buildd logs. If the uninit flags get cleared by functions such as ext2fs_new_inode() or ext2fs_new_block2(), we now make sure the superblock is marked dirty and the block group descriptor checksum is updated if necessary. The debian rules file will now try to load debian/rules.custom of it exists. This flie can skip various builds for speed reasons if there is no need for the e2fsck-static or udeb packages. Available customizations in the rules file includes SKIP_STATIC=yes, SKIP_BF=yes, and SKIP_DIETLIBC=yes. In addition, if the file misc/mke2fs.conf.custom.in exists in the source tree, it will be used instead of the standard misc.conf file in the upstream sources. This makes it easier for Debian-derived systems to distribute a custom mke2fs.conf file without having to worry about merge issues if future versions of e2fsprogs makes changes in the upstream default version of mke2fs.conf.
Source: README, updated 2012-03-28