linux/fs/befs/ChangeLog
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   1Version 0.92 (2002-03-29)
   2==========
   3* Minor cleanup. Ran Lindent on the sources.
   4
   5Version 0.92 (2002-03-27)
   6==========
   7* Fixed module makefile problem. It was not compiling all the correct 
   8    source files!
   9* Removed duplicated function definition
  10* Fixed potential null pointer dereference when reporting an error
  11
  12Version 0.91 (2002-03-26)
  13==========
  14* Oy! Fixed stupid bug that would cause an unresolved symbol error.
  15        Thanks to Laszlo Boszormenyi for pointing this out to me.
  16
  17Version 0.9 (2002-03-14)
  18==========
  19* Added Sergey S. Kostyliov's patch to eliminate memcpy() overhead
  20        from b+tree operations. Changes the befs_read_datastream() interface.
  21
  22* Segregated the functions that interface directly with the linux  vfs 
  23        interface into their own file called linuxvfs.c. [WD]
  24
  25Version 0.64 (2002-02-07)
  26==========
  27* Did the string comparison really right this time (btree.c) [WD]
  28
  29* Fixed up some places where I assumed that a long int could hold
  30        a pointer value. (btree.c) [WD]
  31
  32* Andrew Farnham <andrewfarnham@uq.net.au> pointed out that the module
  33        wouldn't work on older (<2.4.10) kernels due to an unresolved symbol.
  34        This is bad, since 2.4.9 is still the current RedHat kernel. I added
  35        a workaround for this problem (compatibility.h) [WD]
  36
  37* Sergey S. Kostyliov made befs_find_key() use a binary search to find 
  38        keys within btree nodes, rather than the linear search we were using 
  39        before. (btree.c) [Sergey S. Kostyliov <rathamahata@php4.ru>]
  40
  41* Made a debian package of the source for use with kernel-package. [WD]
  42
  43
  44Version 0.63 (2002-01-31)
  45==========
  46* Fixed bug in befs_find_brun_indirect() that would result in the wrong
  47        block being read. It was introduced when adding byteswapping in 
  48        0.61. (datastream.c) [WD]
  49
  50* Fixed a longstanding bug in befs_find_key() that would result in it 
  51        finding the first key that is a substring of the string it is searching
  52        for. For example, this would cause files in the same directory with 
  53        names like file1 and file2 to mysteriously be duplicates of each other 
  54        (because they have the same inode number). Many thanks to Pavel Roskin 
  55        for reporting this serious bug!!!
  56        (btree.c) [WD]
  57
  58* Added support for long symlinks, after Axel Dorfler explained up how 
  59        they work. I had forgotten all about them. (inode.c, symlink.c) [WD]
  60
  61* Documentation improvements in source. [WD]
  62
  63* Makefile fix for independent module when CONFIG_MODVERSION is set in 
  64        kernel config [Pavel Roskin <proski@gnu.org>]
  65
  66* Compile warning fix for namei.c. [Sergey S. Kostyliov <rathamahata@php4.ru>]
  67
  68
  69Version 0.62
  70==========
  71* Fixed makefile for module install [WD]
  72
  73
  74Version 0.61 (2002-01-20)
  75==========
  76* Made functions in endian.h to do the correct byteswapping, no matter
  77        the arch. [WD]
  78
  79* Abbandoned silly checks for a NULL superblock pointer in debug.c. [WD]
  80
  81* Misc code cleanups. Also cleanup of this changelog file. [WD]
  82
  83* Added byteswapping to all metadata reads from disk.
  84        Uses the functions from endian.h [WD]
  85
  86* Remove the typedef of struct super_block to vfs_sb, as it offended
  87        certain peoples' aesthetic sense. [WD]
  88
  89* Ditto with the befs_read_block() interface. [WD]
  90 
  91
  92Version 0.6 (2001-12-15)
  93==========
  94* Cleanup of NLS functions (util.c) [WD]
  95
  96* Make directory lookup/read use the NLS if an iocharset is provided. [WD]
  97
  98* Fixed stupid bug where specifying the uid or gid mount options as '0' 
  99        would result in the filesystem using the on-disk uid and gid. [WD]
 100
 101* Added mount option to control debug printing. 
 102        The option is, simply enough, 'debug'. 
 103        (super.c, debug.c) [WD]
 104
 105* Removed notion of btree handle from btree.c. It was unnecessary, as the
 106        linux VFS doesn't allow us to keep any state between calls. Updated 
 107        dir.c, namei.c befs_fs.h to account for it. [WD]
 108
 109* Improved handleing of overflow nodes when listing directories. 
 110        Now works for overflow nodes hanging off of nodes other than the root 
 111        node. This is the cleaner solution to Brent Miszalaski's problem. [WD]
 112
 113* Added new debug/warning/error print functions in debug.c. 
 114        More flexible. Will soon be controllable at mount time 
 115        (see TODO). [WD]
 116
 117* Rewrote datastream position lookups.
 118        (datastream.c) [WD]
 119
 120* Moved the TODO list to its own file.
 121
 122
 123Version 0.50 (2001-11-13)
 124==========
 125* Added workaround for mis-understanding of the nature of the b+trees used 
 126        in directories. A cleaner solution will come after I've thought about it 
 127        for a while. Thanks to Brent Miszalaski for finding and reporting this bug. 
 128        (btree.c) [WD]
 129
 130* Minor cleanups
 131
 132* Added test for "impossible" condition of empty internal nodes in 
 133        seekleaf() in btree.c [WD]
 134
 135* Implemented the abstracted read_block() in io.c [WD]
 136
 137* Cleaned up the inode validation in inode.c [WD]
 138
 139* Anton Altaparmakov figured out (by asking Linus :) ) what was causing the 
 140        hanging disk io problem. It turns out you need to have the sync_pages 
 141        callback defined in your address_space_ops, even if it just uses the 
 142        default linux-supplied implementation. Fixed. Works now.
 143        (file.c) [WD]
 144
 145* Anton Altaparmakov and Christoph Hellwig alerted me to the fact that 
 146        filesystem code should be using GFP_NOFS instead of GFP_KERNEL as the 
 147        priority parameter to kmalloc(). Fixed. 
 148        (datastream.c, btree.c super.c inode.c) [WD]
 149
 150* Anton also told me that the blocksize is not allowed to be larger than 
 151        the page size in linux, which is 4k i386. Oops. Added a test for 
 152        (blocksize > PAGE_SIZE), and refuse to mount in that case. What this 
 153        practically means is that 8k blocksize volumes won't work without a major
 154        restructuring of the driver (or an alpha or other 64bit hardware). [WD]
 155
 156* Cleaned up the befs_count_blocks() function. Much smarter now. 
 157        And somewhat smaller too. [WD]
 158
 159* Made inode allocations use a slab cache 
 160        (super.c inode.c) [WD]
 161
 162* Moved the freeing of the private inode section from put_inode() to 
 163        clear_inode(). This fixes a potential free twice type bug. Put_inode() 
 164        can be called multiple times for each inode struct. [WD]
 165
 166* Converted all non vfs-callback functions to use befs_sb_info as the 
 167        superblock type, rather than struct super_block. This is for 
 168        portablity. [WD]
 169
 170* Fixed a couple of compile warnings due to use of malloc.h, when slab.h 
 171        is the new way. (inode.c, super.c) [WD]
 172
 173* Fixed erronous includes of linux/befs_fs_i.h and linux/befs_fs_sb.h 
 174        in inode.c [WD]
 175
 176Version 0.45 (2001-10-29)
 177==========
 178* Added functions to get the private superblock and inode structures from 
 179        their enclosing public structures. Switched all references to the 
 180        private portions to use them. (many files) [WD]
 181
 182* Made read_super and read_inode allocate the private portions of those 
 183        structures into the generic pointer fields of the public structures 
 184        with kmalloc(). put_super and put_inode free them. This allows us not 
 185        to have to touch the definitions of the public structures in 
 186        include/linux/fs.h. Also, befs_inode_info is huge (because of the 
 187        symlink string). (super.c, inode.c, befs_fs.h) [WD]
 188
 189* Fixed a thinko that was corrupting file reads after the first block_run 
 190        is done being read. (datastream.c) [WD]
 191
 192* Removed fsync() hooks, since a read-only filesystem doesn't need them. 
 193        [Christoph Hellwig].
 194
 195* Fixed befs_readlink() (symlink.c) [Christoph Hellwig].
 196
 197* Removed all the Read-Write stuff. I'll redo it when it is time to add 
 198        write support (various files) [WD].
 199
 200* Removed prototypes for functions who's definitions have been removed 
 201        (befs_fs.h) [WD].
 202
 203
 204Version 0.4 (2001-10-28)
 205==========
 206* Made it an option to use the old non-pagecache befs_file_read() for 
 207        testing purposes. (fs/Config.in)
 208
 209* Fixed unused variable warnings when compiling without debugging.
 210
 211* Fixed a bug where the inode and super_block didn't get their blockbits 
 212        fields set (inode.c and super.c). 
 213
 214* Release patch version 11. AKA befs-driver version 0.4.
 215
 216* Thats right. New versioning scheme. 
 217        I've done some serious testing on it now (on my box anyhow), and it 
 218        seems stable and not outragously slow. Existing features are more-or-less 
 219        correct (see TODO list). But it isn't 1.0 yet. I think 0.4 gives me some 
 220        headroom before the big 1.0.
 221
 222
 2232001-10-26
 224==========
 225* Fixed date format in this file. Was I smoking crack?
 226
 227* Removed old datastream code from file.c, since it is nolonger used.
 228
 229* Generic_read_file() is now used to read regular file data. 
 230        It doesn't chew up the buffer cache (it does page io instead), and seems 
 231        to be about as fast (even though it has to look up each file block 
 232        indivdualy). And it knows about doing readahead, which is a major plus. 
 233        So it does i/o in much larger chunks. It is the correct linux way. It 
 234        uses befs_get_block() by way of befs_readpage() to find the disk offsets 
 235        of blocks, which in turn calls befs_fpos2brun() in datastream.c to do 
 236        the hard work of finding the disk block number.
 237
 238* Changed method of checking for a dirty filesystem in befs_read_super 
 239        (super.c). Now we check to see if log_start and log_end differ. If so, 
 240        the journal needs to be replayed, and the filesystem cannot be mounted.
 241
 242* Fixed an extra instance of MOD_DEC_USE_COUNT in super.c
 243
 244* Fixed a problem with reading the superblock on devices with large sector 
 245        sizes (such as cdroms) on linux 2.4.10 and up.
 246
 2472001-10-24
 248==========
 249* Fix nasty bug in converting block numbers to struct befs_inode_addr. 
 250        Subtle, because the old version was only sometimes wrong. 
 251        Probably responsible for lots of problems. (inode.c)
 252
 253* Fix bug with reading an empty directory. (btree.c and dir.c)
 254
 255* This one looks good. Release patch version 10
 256
 2572001-10-23
 258==========
 259* Added btree searching function.
 260
 261* Use befs_btree_find in befs_lookup (namei.c)
 262
 263* Additional comments in btree.c
 264
 2652001-10-22
 266==========
 267* Added B+tree reading functions (in btree.c). 
 268        Made befs_readdir() use them them instead of the cruft in index.c.
 269
 2702001-09-11
 271==========
 272* Converted befs_read_file() to use the new datastream code.
 273
 274* Finally updated the README file.
 275
 276* Added many comments.
 277
 278* Posted version 6
 279
 280* Removed byte-order conversion code. 
 281        I have no intention of supporting it, and it was very ugly. 
 282        Flow control with #ifdef (ugh). Maybe I'll redo it once 
 283        native byteorder works 100%.
 284
 2852001-09-10
 286==========
 287* Finished implementing read_datastream()
 288
 289* made befs_read_brun() more general
 290        Supports an offset to start at and a max bytes to read
 291        Added a wrapper function to give the old call
 292
 2932001-09-30
 294==========
 295* Discovered that the datastream handleing code in file.c is quite deficient 
 296        in several respects. For one thing, it doesn't deal with indirect blocks
 297
 298* Rewrote datastream handleing.
 299
 300* Created io.c, for io related functions.
 301        Previously, the befs_bread() funtions lived in file.c
 302        Created the befs_read_brun() function.
 303
 304
 3052001-09-07
 306==========
 307* Made a function to actually count the number of fs blocks used by a file.
 308        And helper functions.
 309        (fs/befs/inode.c)
 310
 3112001-09-05
 312==========
 313* Fixed a misunderstanding of the inode fields. 
 314        This fixed the problmem with wrong file sizes from du and others.
 315        The i_blocks field of the inode struct is not the number of blocks for the
 316        inode, it is the number of blocks for the file. Also, i_blksize is not
 317        necessarily the size of the inode, although in  practice it works out.
 318        Changed to blocksize of filesystem.
 319        (fs/befs/inode.c)
 320
 321* Permanently removed code that had been provisionally ifdefed out of befs_fs.h
 322
 323* Since we don't support access time, make that field zero, instead of 
 324        copying m_time.
 325        (fs/befs/inode.c)
 326
 327* Added sanity check for inode reading
 328        Make sure inode we got was the one we asked for. 
 329        (fs/befs/inode.c)
 330
 331* Code cleanup
 332        Local pointers to commonly used structures in inode.c.
 333        Got rid of abominations befs_iaddr2inode() and befs_inode2ino(). 
 334        Replaced with single function iaddr2blockno().
 335        (fs/befs/super.c) (fs/befs/inode.c)
 336
 3372001-09-01
 338==========
 339* Fixed the problem with statfs where it would always claim the disk was 
 340        half full, due to improper understanding of the statfs fields.
 341        (fs/befs/super.c)
 342
 343* Posted verion 4 of the patch
 344
 3452001-09-01
 346==========
 347* Changed the macros in befs_fs.h to inline functions.
 348        More readable. Typesafe. Better
 349        (include/linux/befs_fs.h)
 350
 351* Moved type definitions from befs_fs.h to a new file, befs_fs_types.h 
 352        Because befs_fs_i.h and befs_fs_sb.h were including befs_fs.h for the 
 353        typedefs, and they are inlcuded in <linux/fs.h>, which has definitions 
 354        that I want the inline functions in befs_fs.h to be able to see. Nasty
 355        circularity.
 356        (include/linux/befs_fs.h)
 357
 3582001-08-30
 359==========
 360* Cleaned up some wording.
 361
 362* Added additional consitency checks on mount
 363        Check block_size agrees with block_shift
 364        Check flags == BEFS_CLEAN
 365        (fs/befs/super.c)
 366
 367* Tell the kernel to only mount befs read-only. 
 368        By setting the MS_RDONLY flag in befs_read_super().
 369        Not that it was possible to write before. But now the kernel won't even try.
 370        (fs/befs/super.c)
 371
 372* Got rid of kernel warning on mount.
 373        The kernel doesn't like it if you call set_blocksize() on a device when 
 374        you have some of its blocks open. Moved the second set_blocksize() to the
 375        very end of befs_read_super(), after we are done with the disk superblock.
 376        (fs/befs/super.c)
 377        
 378* Fixed wrong number of args bug in befs_dump_inode
 379        (fs/befs/debug.c)
 380
 381* Solved lots of type mismatches in kprint()s
 382        (everwhere)
 383
 3842001-08-27
 385==========
 386* Cleaned up the fs/Config.in entries a bit, now slightly more descriptive.
 387
 388* BeFS depends on NLS, so I made activating BeFS enable the NLS questions
 389        (fs/nls/Config.in)
 390
 391* Added Configure.help entries for CONFIG_BEFS_FS and CONFIG_DEBUG_BEFS
 392        (Documentation/Configure.help)
 393
 3942001-08-??
 395==========
 396* Removed superblock locking calls in befs_read_super(). In 2.4, the VFS 
 397        hands us a super_block struct that is already locked.
 398
 3992001-08-13
 400==========
 401* Will Dyson <will_dyson@pobox.com> is now attempting to maintain this module
 402        Makoto Kato <m_kato@ga2.so-net.ne.jp> is original author.Daniel Berlin 
 403        also did some work on it (fixing it up for the later 2.3.x kernels, IIRC).
 404
 405* Fixed compile errors on 2.4.1 kernel (WD)
 406        Resolve rejected patches
 407        Accommodate changed NLS interface (util.h)
 408        Needed to include <linux/slab.h> in most files
 409        Makefile changes
 410        fs/Config.in changes
 411
 412* Tried to niceify the code using the ext2 fs as a guide
 413        Declare befs_fs_type using the DECLARE_FSTYPE_DEV() macro
 414
 415* Made it a configure option to turn on debugging (fs/Config.in)
 416
 417* Compiles on 2.4.7
 418
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