changes

这是Linux系统下的对UDF文件系统新增的功能

dgb: David Boynton
blf: Ben Fennema      ([e-mail])
rl:  Reinoud Lamberts ([e-mail])
rew: Roger E. Wolff   ([e-mail])


10/02/98 dgb    Implemented some changes suggested by HJA Sandkuyl.
                Moved files around to support user-land access to 
                filesystem via library
10/04/98        Implemented table-based lookup for timestamp conversions
                Fixed unicode convertions, added volident field to superblock
10/06/98        Implemented directory operations, most of which work!

10/07/98 dgb    Milestone reached. Rudimentary directory and file reading.
                Limited in number of directory entries, though, about 30-40.

10/16/98        Attempting some multi-session support.

10/18/98        Fixed some directory problems; still limited but
                doesn't seem to crash or oops now.
                Enhanced "df" output a little.  Generally much more stable.

11/29/98        Added better support for 'extents', long directories are ok now.
                Incorporated some changes from Ben Fennema, including mkudf.
                Still can't handle the "Sequential.img" test case from Adaptec.
                Improved taglist and added a new dumpfe tool.

12/6/98         Good results with Thomas Tempelmann's UDF1.02.img, although
                still needs some 'short_ad' updates, and filename translation.
                Superficial support for virtual & sparable partitions.

12/8/98 blf     Partition support for Spared Blocks and Virtual Partitions.
                Definite bugs in Virtual Partitions (lastblock only set correctly
                on files).

12/10/98 rl     Changed "." and ".." file name translation into human
                readable form.

12/11/98 rl/rew Fixed incorrect name compare (udf_lookup).

12/13/98 rew    Cleanup of CHANGES/TODO

12/14/98 blf    Full partition support. Code cleanups. No warnings! :)
                UDF1.02.img, SparedBlks.img, and Sequential.img all work.

12/15/98 rl     Fixed udf/tools gcc warnings (except, on purpose, the mkudf
                write_fileentry4 and dumpfe partstart ones).  Updated TODO.

12/19/98 dgb    Added semaphore and reorganized udf_iget. 
                Worked on byte order (incomplete). Implemented umask.
                Fixed block size reporting, and count_free error.

12/20/98 blf    Completed byte ordering (perhaps).
                Support for strategy 4096
                Really basic support for finding the unallocated space bitmap
                (we really need support for unallocated space tables +
                freed space tables/bitmaps...)

2/9/99 dgb        Tested with Kernel 2.2.1. 
                Added some ioctl's for extended attributes and volume ident.
                Added UDF_COMPILING define to udf_fs_i.h to allow kernel to
                compile without gagging on lb_addr.
                Minor change to mkudf so it gives help w/'mkudf' and nothing
                else. Changed 'dump' to 'dumpsect' to avoid conflict.

03/07/99 blf    Beginnings of write support.. chmod + rm of files.
                New implementation of udf_bmap            
                Updates to mkudf

03/12/99 blf    Bug fixes. Support for reading length on MMC-3 drives.

03/30/99 blf    Continuation of write support. creation of files. (minus the
                case where a new block needs to be allocated to fit the FID
                in the block)
                Moved all the code that bangs on the CDROM to lowlevel.c
                Added code to do variable -> fixed block translation for
                reading CDRW's on drives that only support variable packet
                reading.
                Futzed with the debugging code a bunch. Added udf_debug and
                udf_info.

04/09/99 blf    Added Configure script

04/19/99 blf    Support for link, symlink, and mknod

05/12/99 blf    Initial support for writing (no sparse files)

05/28/99 blf    Fixed various directory entry writing bugs. Added rename
                for files and directories. Add fsync support (untested)
                Handle VAT's that are in the ICB.

06/03/99 blf    Fixed writing for files > 1 block
                Started spliting out support for AD_IN_ICB files.

06/11/99 dgb    Added a UDF_RECOVERY compile option and update to ./src/namei.c
                that enables a ".B=xxx" filename syntax, useful for recovering 
                files from damaged discs.  Modified ./patch/Makefile to 
                assist in building kernel patches.

06/16/99 blf    (Hopefully) fixed rename for versions <= 2.2.5
                Fixed sparse files
                Fixed block allocation algorithm to function properly

07/15/99 blf    Fixed deletes (truncate problems)
                Fixed various write bugs
                Add block extension to truncate routine
                Recalculate crc on udf_insert_aext
                Changes to mkudf

08/19/99 blf    Ported to linux 2.3.7+
                Rewrote inode_getblk

09/02/99 blf    Fixed unicode and anchor location bugs

09/16/99 dgb    Fixed Configure to handle RedHat 6.0's kernel (which reports 
        "UTS_RELEASE 2.2.5-15".) Fixed Configure to make symlinks for 
        patch and src directories. Modified patch system to dynamically 
        create diff files, instead of using pre-build diffs, and to 
        better handle the apply/unapply. First draft of a FAQ.
        Modified "make lib" to make both static and shared libraries.

09/18/99 dgb    Updated patch system to properly apply/unapply from kernel 2.2,
        And updated patch-2.3 to only do updates, since the driver
        is now in the kernel (2.3.17+).

09/27/99 blf    Fixed bug in long directories. Fixed time hour problems.
                Coped ioctl changes from 2.2 to 2.3 tree. Added 2.3.18 changes
                to 2.2 tree.

10/29/99 blf    Some read fixes and lots of write fixes.
                Fixed mkudf so it hopefully correctly detects the size of
                media.

11/18/99 blf    Re-orgranized udfdecl.h
                Fixed extent generation for continuous files > 2^30 - blocksize
                Fixed FileIdent location for FileIdents starting on a block boundary.
                mkudf updates

01/17/00 blf    Fix UTS_SHORT to handle non numeric extraversions
                Tested/Fixed UTF-8 <-> Wide character handling
                Rewrote partition handling
                Read sparing table into RAM to allow for adding entries to it
                removed UDF_I_EXT0... info from the inode
                Changing write code to only expand ADINICB files when we have to
                Added code to allow ADINICB files to be mmap'd
                Sync'd changes with 2.3 development
                Got rid of the semaphore in udf_iget

02/29/00 blf    Fix truncate
                Added noadinicb/shortad options
                Redid flag system
                Added udf versioning info
                Fixed block size calculations
                Quota should be set everywhere correctly
                Sync'd changes with 2.3 development
                Added cdrwtool and pktcdvd to tools
                mkudf updates

04/26/00 blf    handle tables in addition to bitmaps
                handle freed as well as unallocated bitmaps/tables
                fixed bugs based on udf plugfest
                Configure handling for SMP
                mkudf updates

12/25/00 blf	fixed a bunch of write bugs and a directory read bug

06/05/01 blf	fixed a rename bug when rename caused a AD_IN_ICB to be expanded out of the directory
		added strict mount option
		added iocharset= to allow using NLS (vs default of utf8)
		rewrote sparing support - added udf_relocate_blocks

06/13/01 blf	fix i_blocks off by one error when expanding AD_IN_ICB
		handle redhat and -ac kernels (quota changes)
		handle creation time for efe's and use ctime correctly
		update objectSize on inode write for efe's
		handle FILE_TYPE_REALTIME as normal file

10/10/01 blf	quota change fixes
		rm BUG()
		> 4 GB file bug
		less stringent on directory errors (Matrix DVD)
		lazier last block detection
		default to strict UDF conformance