fs/befs/ChangeLog

   1 Version 0.92 (2002-03-29)
   2 ==========
   3 * Minor cleanup. Ran Lindent on the sources.
   4
   5 Version 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
  12 Version 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
  17 Version 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
  25 Version 0.64 (2002-02-07)
  26 ==========
  27 * Did the string comparision 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
  44 Version 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
  69 Version 0.62
  70 ==========
  71 * Fixed makefile for module install [WD]
  72
  73
  74 Version 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
  92 Version 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 positon lookups.
 118         (datastream.c) [WD]
 119
 120 * Moved the TODO list to its own file.
 121
 122
 123 Version 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         practicaly 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
 176 Version 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 (becuase 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
 204 Version 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
 223 2001-10-26
 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
 247 2001-10-24
 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
 257 2001-10-23
 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
 265 2001-10-22
 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
 270 2001-09-11
 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
 285 2001-09-10
 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
 293 2001-09-30
 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
 305 2001-09-07
 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
 311 2001-09-05
 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
 337 2001-09-01
 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
 345 2001-09-01
 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
 358 2001-08-30
 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
 384 2001-08-27
 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
 394 2001-08-??
 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
 399 2001-08-13
 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         Accomodate 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