CHANGES

			SQUASHFS CHANGE LOG

1.0 	23 OCT 2002	Initial release

1.0c 	14 NOV 2002	Bug fix release

	Fixed bugs with initrds and device nodes

1.1	8 JAN 2003	Added features

	1. Kernel squashfs can now mount different byte order filesystems.
	2. Additional features added to mksquashfs.  Mksquashfs now supports
	   exclude files and multiple source files/directories can be
	   specified.  A nopad option has also been added, which
	   informs mksquashfs not to pad filesystems to a multiple of 4K.
	   See README for mksquashfs usage changes.
	3. Greater than 2GB filesystems bug fix.  Filesystems greater than 2GB
	   can now be created.
	4. Patch for 2.4.20 kernels.

1.1b	16 JAN 2003	Bug fix release

	Fixed readpage deadlock bug.  This was a rare deadlock bug that
	happened when pushing pages into the page cache when using greater
	than 4K blocks.  I never got this bug when I tested the filesystem,
	but two people emailed me on the same day about the problem!
	I fixed it by using a page cache function that wasn't there when
	I originally did the work, which was nice :-)

1.2	13 MAR 2003	Append feature and new mksquashfs options added

	Mksquashfs can now add to existing squashfs filesystems.  Three extra
	options "-noappend", "-keep-as-directory", and "root-becomes"
	have been added.

	The append option with file duplicate detection, means squashfs can be
	used as a simple versioning archiving filesystem. A squashfs
	filesystem can be created with for example the linux-2.4.19 source.
	Appending the linux-2.4.20 source will create a filesystem with the
	two source trees, but only the changed files will take extra room,
	the unchanged files will be detected as duplicates.

	See the README file for usage changes.

1.3	29 JUL 2003	FIFO/Socket support added plus optimisations and
		        improvements

	1. FIFOs and Socket inodes are now supported,
	2. Mksquashfs can now compress files larger than available
	   memory,
	3. File duplicate check routine optimised,
	4. Exit codes fixed in Mksquashfs,
	5. Patch for Linux 2.4.21,
	6. Patch for Linux 2.6.0-test1.  Hopefully, this will work for
	   the next few releases of 2.6.0-testx, otherwise, I'll be
	   releasing a lot of updates to the 2.6.0 patch...

1.3r2	14 OCT 2003	Second release of 1.3, bug fixes and extra patches for
		        new kernels

	1. Bug fix in routine that adds files to the filesystem being
	   generated in mksquashfs.  This bug was introduced in 1.3
	   (not enough testing...) when I rewrote it to handle files larger
	   than available memory.  This bug caused a SEGV, so if you've ever
	   got that, it is now fixed,
	2. Long running bug where ls -s and du reported wrong block size
	   fixed.  I'm pretty sure this used to work many kernel versions ago
	   (2.4.7) but it broke somewhere along the line since then,
	3. New patch for Linux 2.4.22,
	4. New patch for 2.6.0-test7, this replaces the patch for 2.6.0-test1.

1.3r3	18 JAN 2004	Third release of 1.3, this adds a new mksquashfs option,
			some bug fixes, and extra patches for new kernels

	1. New mksquashfs -ef exclude option.  This option reads the exclude
	   dirs/files from an exclude file, one exclude dir/file per line.  This
	   avoids the command line size limit when using the -e exclude option,
	2. When appending to existing filesystems, if mksquashfs experiences a
	   fatal error (e.g. out of space when adding to the destination), the
	   original filesystem is restored,
	3. Mksquashfs now builds standalone, without the kernel needing to be
	   patched.
	4. Bug fix in the kernel squashfs filesystem, where the pages being
	   filled were not kmapped.  This seems to only have caused problems
	   on an Apple G5,
	5. New patch for Linux 2.4.24,
	6. New patch for Linux 2.6.1, this replaces the patch for 2.6.0-test7.

2.0-ALPHA	21 MAY 2004	Filesystem changes and compression improvements

	1. Squashfs 2.0 has added the concept of fragment blocks.
           Files smaller than the file block size and optionally the
	   remainder of files that do not fit fully into a block (i.e. the
	   last 32K in a 96K file) are packed into shared fragments and
	   compressed together.  This achieves on average 5 - 20% better
	   compression than Squashfs 1.x.
	2. The maximum block size has been increased to 64K (in the ALPHA
	   version of Squashfs 2.0).
	3. The maximum number of UIDs has been increased to 256 (from 48 in
	   1.x).
	4. The maximum number of GIDs has been increased to 256 (from 15 in
	   1.x).
	5. Removal of sleep_on() function call in 2.6.x patch, to allow Squashfs
	   to work on the Fedora rc2 kernel.
	6. Numerous small bug fixes have been made.

2.0	13 JULY 2004	A couple of new options, and some bug fixes

	1. New mksquashfs -all-root, -root-owned, -force-uid, and -force-gid
	   options.  These allow the uids/gids of files in the generated
	   filesystem to be specified, overriding the uids/gids in the
	   source filesystem.
	2. Initrds are now supported for kernels 2.6.x.
	3. amd64 bug fixes.  If you use an amd64, please read the README-AMD64
	   file.
	4. Check-data and gid bug fixes.  With 2.0-alpha when mounting 1.x
	   filesystems in certain cases file gids were corrupted.
	5. New patch for Linux 2.6.7.

2.0r2	29 AUG 2004	Workaround for kernel bug in kernels 2.6.8 and newer
			added

	1. New patch for kernel 2.6.8.1.  This includes a workaround for a
	   kernel bug introduced in 2.6.7bk14, which is present in all later
	   versions of the kernel.  

	   If you're using a 2.6.8 kernel or later then you must use this
	   2.6.8.1 patch.  If you've experienced hangs or oopses using Squashfs
	   with a 2.6.8 or later kernel then you've hit this bug, and this
	   patch will fix it.

	   It is worth mentioning that this kernel bug potentially affects
	   other filesystems.  If you receive odd results with other
	   filesystems you may be experiencing this bug with that filesystem.
	   I submitted a patch but this has not yet gone into the
	   kernel, hopefully the bug will be fixed in later kernels.