mirror of https://github.com/vitalif/e2fsprogs
RELEASE-NOTES:
Updated release notes for 1.20 release README: Update for 1.20 release.bitmap-optimize
Theodore Ts'o
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README
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README
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This is the new version (1.19) of the second extended file
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This is the new version (1.20) of the second extended file
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system management programs.
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From time to time, I release new versions of e2fsprogs, to fix
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170
RELEASE-NOTES
170
RELEASE-NOTES
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E2fsprogs 1.20 (August 20, 2000 --- WORK IN PROGRESS)
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=====================================================
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E2fsprogs 1.20 (May 10, 2001)
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=============================
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Add support for replaying the ext3 journal purely in user mode. Used
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code contributed by Andreas Dilger, with bug fixes by Theodore Ts'o.
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Add support for replaying the ext3 journal purely in user mode,
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including handling the orphaned inode list. Used code contributed by
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Andreas Dilger, with bug fixes and the orphaned inode handling done
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by Theodore Ts'o.
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The mke2fs and tune2fs programs can create or modify a filesystem to
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include an ext3 journal. Tune2fs also can be used to remove an ext3
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journal from a filesystem.
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E2fsck will now check for the existence of a linked list of orphan
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inodes in the superblock, and clear those inodes before starting the
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rest of the filesystem check (but after the journal playback).
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E2fsck now validates the file descriptor passed to the -C option,
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which saves against the completion bar getting written to an
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unexpected location, such as the disk being checked. (Debian
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bug/wishlist #55220)
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E2fsck will now bump the filesystem revision number from zero to one
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if any of the compatibility bits are set.
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Fixed a bug where a badly corrupted directory on a big endian system
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could cause e2fsck to die with a bus error. The
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ext2fs_read_dir_block() and ext2fs_process_dir_block() functions in
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the ext2 library now does alignment sanity checks on the rec_len field
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of the directory entry before using it.
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The ext2 library has been enhanced to make tune2fs safe to run on
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mounted filesystems. (Users could usually get away with using tune2fs
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on mounted filesystems before, but with the advent of ext3 and
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journaling, it became important to make tune2fs was *really* safe for
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use even when the filesystem being modified is mounted.) E2label is
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now implemented by tune2fs using an argv[0] dispatch, so that e2label
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is also now safe for use on mounted filesystems.
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Added a new program, e2image, which creates a backup of critical ext2
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filesystem data structures. The generated image file can be examined
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using dumpe2fs and debugfs. In the future, e2fsck will be able to use
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the image file to help recover very badly damaged filesystems.
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Fixed a number of LFS bugs in e2fsck; very, very large (> 2**42) files
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no longer cause e2fsck to bomb out. Also treat files > 2GB as being
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large file when deciding whether or not the filesystem has large files.
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Fixed lsattr and chattr so that they work correctly on large files.
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(Fixes Debian bug #72690.)
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Removed limitation in get_device_size() which imposed a one terrabyte
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filesystem limitation. (Most 2.2 kernels still have a signed int
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problem which cause 1 TB block device limitation. Fortunately, the
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kernel patches to fix this are much easier than fixing the 2TB
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limitation in the kernel. :-)
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A max_mount_count of zero is now treated as if no mount count were
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set. (Previously, no mount count was indicated by using -1, and a
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mount count of zero caused e2fsck to always be run.)
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Mke2fs supports two new filesystem types largefile and largefile64.
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Mke2fs now adds some randomness in s_max_mount_count so that multiple
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filesystems won't be all checked at the same time under normal
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operations.
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Fixed bug in the progress bar printing code which could cause e2fsck
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to core dump on an illegal filesystem.
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Fixed bug in fsck which could allow more than one instance of e2fsck
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to be printing a progress bar. (Debian bug #65267)
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Fsck using a UUID or a LABEL specifier will work even if devfs is
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compiled into the kernel and not mounted. If the pathnames in
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/proc/partitions are incorrect, fsck will search /dev for the correct
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device (using the new ext2fs_find_block_device library function).
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Fsck now also checks the RAID devices first so that they are properly
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found when they are in use.
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found when they are in use. Support has also been added to support
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additional IDE disks and the DAC 960 device names. (Debian bug #94159)
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Fixed a bug in fsck which caused it not deal properly with 16
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byte long filesystem labels.
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The dumpe2fs program can now print out the group description
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information in hex, and also prints the location of the superblock and
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@ -36,6 +99,27 @@ complete, and it avoids a bit of code duplication.
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Added a new debugfs command, set_super_value (ssv) which allows the
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user to set arbitrary superblock fields.
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Debugfs was extended to support inode numbers in hex (by prefixing
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them with 0x), and so that modify_inode can set the inode generation
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number. Also, there is now a new function command called logdump
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which will dump an ext3 journal.
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Fixed a bug in debugfs so that quitting out of the pager doesn't kill
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debugfs.
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Debugfs's dump command now stops immediately upon reporting a disk
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read error. (Fixed a bug in ext2fs_file_read library routine which
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caused debugfs not to stop.) (Debian bug #79163)
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On systems with /proc/mounts (mainly Linux systems), /proc/mounts is
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checked before /etc/mtab is used, since /proc/mounts is more likely to
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be accurate.
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Added portability fixes for Solaris and Linux/ia64.
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Various manual pages were clarified and cleaned up. (Fixed debian
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bugs #63442, #67446, and #87216)
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Programmer's notes:
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-------------------
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@ -43,14 +127,76 @@ Programmer's notes:
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The e2fsck message printer now supports %Iu and %Ig, which will print
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out the inode's user and group owners, respectively.
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E2fsprogs now includes its own version of include/linux/ext2_fs.h, so
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that no longer dependent on the system having the correct version of
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the kernel header files.
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Added a new function to libext2, ext2fs_find_block_device(), which
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searches the system (i.e., /dev, /devfs, /devices) for a pathname to a
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device given its device number.
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Added a new function to libext2, ext2fs_sync_device, which centralizes
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all of the places which might try to use the BLKFLSBUF or FDFLUSH
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ioctls (and usually failing to define them since the system header
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files don't usually do this for us, and we're trying to avoid usage of
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kernel include files now).
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Added new utility programs in tests/progs: random_exercise and
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hold_inode. They aren't built by default; they're useful for
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exercising ext3 filesystem code.
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Added a new ext2 filesystem flag, EXT2_FLAG_SUPER_ONLY, which causes
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the filesystem close functions to only update the superblock, and to
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not touch the block group descriptors. Needed by tune2fs when
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modifying a mounted filesystem.
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Got rid of struct ext2fs_sb and replaced it with the standard struct
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ext2_super_block from include/linux/ext2_fs.h. Note: this may break
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source (but not binary) compatibility of some users of the ext2
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library. Those applications should just simply do a global search and
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replace of struct ext2fs_sb with struct ext2_super_block, and use
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their own private copy of ext2_fs.h if they aren't already.
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The ino_t type has been renamed ext2_ino_t to protect applications
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that attempt to compile -D_FILE_OFFSET_BITS=64, since this
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inexplicably changes ino_t(!?). So we use ext2_ino_t to avoid an
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unexpected ABI change.
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The Makefiles have been reworked so that "make check" can be run from
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the top-level Makefile.
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Fix general gcc -Wall complaints and removed dead code.
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Remove use of NOARGS, because we assume everyone does ANSI C these
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days.
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Added build-rpm script from sct.
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New functions ext2fs_image_{inode,super,bitmap}_{read,write} added
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to support e2image.
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New function ext2fs_flush_icache which must be called if the
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application program modifies the inode table blocks without going
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through ext2fs_write_inode() interface.
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New ext2fs_check_mount_point() function, which will return the mount
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point of a device if mounted.
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The io_channel abstraction now has an optional interface,
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io_channel_write_range, which allows specific byte ranges to be
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written.
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The unix_io IO channel now supports write-through caching, so that
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journal creation is more efficient.
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Added x86 assembly language routines to support byte swapping, to
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reduce executable size.
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Fixed bug in the utility program subst so that it's possible to
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replace a substitution variable with a zero-length string.
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Fixed numbering e2fsck pass1 problem numbers; an extra zero had
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slipped into some of the problem number.
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E2fsprogs 1.19 (July 13, 2000)
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==============================
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@ -108,6 +254,15 @@ bitmap copy in pass5.
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E2fsck now properly prints control characters in filenames as ^A .. ^Z.
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E2fsck now calculates the correct location of the backup superblock in
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the case of filesystem blocksizes > 1k.
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Fixed a bug in e2fsck's calculation of the number of inodes_per_block
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which normally didn't cause problems under most filesystem parameters,
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but could cause a valid superblock to be rejected in extreme cases.
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Other checks for validating superblock values were made more
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stringent.
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Added non-destructive write testing to the badblocks program, courtesy
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of David Beattie. The badblocks also now has an option to input the
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current set of bad blocks, so that known bad blocks are skipped to
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@ -209,7 +364,10 @@ Cleaned up makefiles:
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Fix test_script so that it works correctly when compiling in the
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source directory.
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Update libraries to build under a.out shared libraries (again).
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The random UUID generation routine has been made slightly better in
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the case where /dev/random doesn't exist. (Use of randomly-based UUID
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is still not recommended if /dev/random doesn't exist, however; it's
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better to use the time/ethernet MAC address UUID in this case.)
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Clean up the build process so it's more friendly in case of missing
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directories.
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