doc/RelNotes/v1.15.txt - platform/external/e2fsprogs - Git at Google

 E2fsprogs 1.15 (July 18, 1999)
 ==============================

 Add configuration checks so that e2fsprogs will compile cleanly on
 Linux 2.3 kernels that have renamed i_version to i_generation.

 E2fsck now prints a progress/completion bar (and not just a simple
 spinner) if the -C0 option is requested or if it receives a SIGUSR1
 signal.  Fsck will automatically manage the (potentially multiple)
 e2fsck processes to print completion bars if it is given a -C option,
 with the right thing happening if multiple filesystems are being
 checked in parallel.

 Mke2fs now has better automatic heuristics to determine the filesystem
 parameters to be used for a particular filesystem.  Added a new option
 -T which allows the user to specify how the filesystem is to be used,
 which helps mke2fs do a better job selecting the filesystem parameters.

 Mke2fs now creates revision 1 filesystems by default, and with the
 sparse superblock feature enabled.  The sparse superblock feature is
 not understood by Linux 2.0 kernels, so they will only allow read-only
 mounts of filesystems with this sparse superblocks.

 Fix bug where if /dev/null couldn't be opened (should never happen),
 e2fsck would hang in a tight loop.

 Make e2fsck handle the case where /lost+found isn't a directory.

 E2fsck now uses mallinfo if it exists to get accurate statistics about
 its memory usage.

 Fix bug in e2fsck where it wouldn't check to see if a disconnected
 inode had any problems before connecting it to /lost+found.

 Add check to e2fsck so it makes sure that total number of inodes in
 the filesystem is a sane number.

 Fix fencepost error when clearing an the end of the block bitmap which
 caused the last block in the bitmap not to get cleared.

 Cleaned up a number of messages in e2fsck:
 	* The message "Group's #'s copy of the group descriptor..."
 		was fixed so that the correct number would be displayed.
 	* Added missing space in the "disk write-protected" error message
 	* Cleaned up the error message printed when a non-interactive
 		e2fsck needs to abort a check because the filesystem
 		appears to be mounted.

 Added a new command-line utility, uuidgen, which will create and print
 a UUID.

 Make debugfs's icheck command more robust by checking to make sure an
 inode has valid blocks before iterating over the inode's blocks.

 UUID generation now uses a random-based scheme whenever possible to
 prevent potential privacy problems.

 Man pages for all of the UUID functions in the library were added.

 Fixed bug in fsck so it won't coredump if a filesystem not in
 /etc/fstab is given to it.

 Fsck now understands the UUID=xxxx and LABEL=yyyy forms in /etc/fstab
 that most of the other mount utilities understands.

 Mke2fs will make a filesystem even if it appears mounted if the force
 option is given.

 Dumpe2fs has new command-line options which allow a filesystem expert
 to specify the superblock and blocksize when opening a filesystem.
 This is mainly useful when examining the remains of a toasted
 filesystem.

 The badblocks program has been updated to display correctly on disks
 with large block numbers.

 The badblocks program no longer gives spurious errors when errors
 occur on non-block boundaries, which is common if the blocksize is
 larger than 1k.

 Mke2fs will sync the disk device every MKE2FS_SYNC block groups if the
 MKE2FS_SYNC environment variable is set.  This is to work around a VM
 bug in the 2.0 kernel.  I've heard a report that a RAID user was able
 to trigger it even using a 2.2 kernel, but hopefully it will not be
 needed for most Linux 2.2 users.

 Fixed miscellaneous documentation and man pages.

 Programmer's notes:
 -------------------

 Cleaned up functions such as pass1_get_blocks, pass1_read_inode which
 in e2fsck's pass1.c really should have been static.

 The return value of the uuid_compare() function was changed to make it
 match with the conventions used by strcmp, memcmp, and Paul Leach's
 UUID sample document.

 The "make depend" process has now been made more automated; it now
 automatically word-wraps the dependencies, and only replaces source
 Makefile.in if there has been a change in the dependencies.  Also, a
 top-level "make depend" now recurses through all the subdirectories
 automatically.

 The Makefile in .../util has been changed so that subst is built using
 the native C compiler during a cross-compilation, since the subst
 program is only used during the build process.  Also add an explicit
 rule to build util/subst by cd'ing to the correct directory and
 running Makefile.

 The man directories are defined in terms mandir, so that the configure
 script can override the location of the manual pages.

 The config files have been updated to recognize new machine types for
 both the i386 and alpha families.

 Fsck has been modified so that it will accurately create an
 fsck_instance even when the noexecute flag is set.  This allows for
 accurate debugging of the fsck pass structure.  Also, when the verbose
 flag is given twice, fsck will print debugging information about when
 fsck is waiting for jobs to finish.
	E2fsprogs 1.15 (July 18, 1999)
	==============================

	Add configuration checks so that e2fsprogs will compile cleanly on
	Linux 2.3 kernels that have renamed i_version to i_generation.

	E2fsck now prints a progress/completion bar (and not just a simple
	spinner) if the -C0 option is requested or if it receives a SIGUSR1
	signal. Fsck will automatically manage the (potentially multiple)
	e2fsck processes to print completion bars if it is given a -C option,
	with the right thing happening if multiple filesystems are being
	checked in parallel.

	Mke2fs now has better automatic heuristics to determine the filesystem
	parameters to be used for a particular filesystem. Added a new option
	-T which allows the user to specify how the filesystem is to be used,
	which helps mke2fs do a better job selecting the filesystem parameters.

	Mke2fs now creates revision 1 filesystems by default, and with the
	sparse superblock feature enabled. The sparse superblock feature is
	not understood by Linux 2.0 kernels, so they will only allow read-only
	mounts of filesystems with this sparse superblocks.

	Fix bug where if /dev/null couldn't be opened (should never happen),
	e2fsck would hang in a tight loop.

	Make e2fsck handle the case where /lost+found isn't a directory.

	E2fsck now uses mallinfo if it exists to get accurate statistics about
	its memory usage.

	Fix bug in e2fsck where it wouldn't check to see if a disconnected
	inode had any problems before connecting it to /lost+found.

	Add check to e2fsck so it makes sure that total number of inodes in
	the filesystem is a sane number.

	Fix fencepost error when clearing an the end of the block bitmap which
	caused the last block in the bitmap not to get cleared.

	Cleaned up a number of messages in e2fsck:
	* The message "Group's #'s copy of the group descriptor..."
	was fixed so that the correct number would be displayed.
	* Added missing space in the "disk write-protected" error message
	* Cleaned up the error message printed when a non-interactive
	e2fsck needs to abort a check because the filesystem
	appears to be mounted.

	Added a new command-line utility, uuidgen, which will create and print
	a UUID.

	Make debugfs's icheck command more robust by checking to make sure an
	inode has valid blocks before iterating over the inode's blocks.

	UUID generation now uses a random-based scheme whenever possible to
	prevent potential privacy problems.

	Man pages for all of the UUID functions in the library were added.

	Fixed bug in fsck so it won't coredump if a filesystem not in
	/etc/fstab is given to it.

	Fsck now understands the UUID=xxxx and LABEL=yyyy forms in /etc/fstab
	that most of the other mount utilities understands.

	Mke2fs will make a filesystem even if it appears mounted if the force
	option is given.

	Dumpe2fs has new command-line options which allow a filesystem expert
	to specify the superblock and blocksize when opening a filesystem.
	This is mainly useful when examining the remains of a toasted
	filesystem.

	The badblocks program has been updated to display correctly on disks
	with large block numbers.

	The badblocks program no longer gives spurious errors when errors
	occur on non-block boundaries, which is common if the blocksize is
	larger than 1k.

	Mke2fs will sync the disk device every MKE2FS_SYNC block groups if the
	MKE2FS_SYNC environment variable is set. This is to work around a VM
	bug in the 2.0 kernel. I've heard a report that a RAID user was able
	to trigger it even using a 2.2 kernel, but hopefully it will not be
	needed for most Linux 2.2 users.

	Fixed miscellaneous documentation and man pages.

	Programmer's notes:
	-------------------

	Cleaned up functions such as pass1_get_blocks, pass1_read_inode which
	in e2fsck's pass1.c really should have been static.

	The return value of the uuid_compare() function was changed to make it
	match with the conventions used by strcmp, memcmp, and Paul Leach's
	UUID sample document.

	The "make depend" process has now been made more automated; it now
	automatically word-wraps the dependencies, and only replaces source
	Makefile.in if there has been a change in the dependencies. Also, a
	top-level "make depend" now recurses through all the subdirectories
	automatically.

	The Makefile in .../util has been changed so that subst is built using
	the native C compiler during a cross-compilation, since the subst
	program is only used during the build process. Also add an explicit
	rule to build util/subst by cd'ing to the correct directory and
	running Makefile.

	The man directories are defined in terms mandir, so that the configure
	script can override the location of the manual pages.

	The config files have been updated to recognize new machine types for
	both the i386 and alpha families.

	Fsck has been modified so that it will accurately create an
	fsck_instance even when the noexecute flag is set. This allows for
	accurate debugging of the fsck pass structure. Also, when the verbose
	flag is given twice, fsck will print debugging information about when
	fsck is waiting for jobs to finish.