Root/fs/befs/ChangeLog

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 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
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 positon 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    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
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 (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
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    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
418

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