xref: /openbmc/linux/fs/affs/Changes (revision bb970707)
1(Note: I consider version numbers as cheap. That means
2that I do not like numbers like 0.1 and the like for
3things that can be used since quite some time. But
4then, 3.1 doesn't mean 'perfectly stable', too.)
5
6Known bugs:
7-----------
8
9- Doesn't work on the alpha. The only 64/32-bit
10  problem that I'm aware of (pointer/int conversion
11  in readdir()) gives compiler warnings but is
12  apparently not causing the failure, as directory
13  reads basically work (but all files are of size 0).
14  Alas, I've got no alpha to debug. :-(
15
16- The partition checker (drivers/block/genhd.c)
17  doesn't work with devices which have 256 byte
18  blocks (some very old SCSI drives).
19
20- The feature to automatically make the fs clean
21  might leave a trashed file system with the
22  bitmap flag set valid.
23
24- When a file is truncated to a size that is not
25  a multiple of the blocksize, the rest of the
26  last allocated block is not cleared. Well,
27  this fs never claimed to be Posix conformant.
28
29Please direct bug reports to: zippel@linux-m68k.org
30
31Version 3.20
32------------
33- kill kernel lock
34- fix for a possible bitmap corruption
35
36Version 3.19
37------------
38
39- sizeof changes from Kernel Janitor Project
40- several bug fixes found with fsx
41
42Version 3.18
43------------
44
45- change to global min macro + warning fixes
46- add module tags
47
48Version 3.17
49------------
50
51- locking fixes
52- wrong sign in __affs_hash_dentry
53- remove unnecessary check in affs_new_inode
54- enable international mode for dircache fs
55
56Version 3.16
57------------
58
59- use mark_buffer_dirty_inode instead of mark_buffer_dirty.
60- introduce affs_lock_{link|dir|ext}.
61
62Version 3.15
63------------
64
65- disable link to directories until we can properly support them.
66- locking fixes for link creation/removal.
67
68Version 3.14
69------------
70
71- correctly cut off long file names for compares
72- correctly initialize s_last_bmap
73
74Version 3.13
75------------
76
77Major cleanup for 2.4 [Roman Zippel]
78- new extended block handling
79- new bitmap allocation functions
80- locking should be safe for the future
81- cleanup of some interfaces
82
83Version 3.12
84------------
85
86more 2.4 fixes: [Roman Zippel]
87- s_lock changes
88- increased getblock mess
89- clear meta blocks
90
91Version 3.11
92------------
93
94- Converted to use 2.3.x page cache [Dave Jones]
95- Corruption in truncate() bugfix [Ken Tyler <kent@werple.net.au>]
96
97Version 3.10
98------------
99
100- Changed partition checker to allow devices
101  with physical blocks != 512 bytes.
102
103- The partition checker now also ignores the
104  word at 0xd0 that Windows likes to write to.
105
106Version 3.9
107-----------
108
109- Moved cleanup from release_file() to put_inode().
110  This makes the first one obsolete.
111
112- truncate() zeroes the unused remainder of a
113  partially used last block when a file is truncated.
114  It also marks the inode dirty now (which is not
115  really necessary as notify_change() will do
116  it anyway).
117
118- Added a few comments, fixed some typos (and
119  introduced some new ones), made the debug messages
120  more consistent. Changed a bad example in the
121  doc file (affs.txt).
122
123- Sets the NOEXEC flag in read_super() for old file
124  systems, since you can't run programs on them.
125
126Version 3.8
127-----------
128Bill Hawes kindly reviewed the affs and sent me the
129patches he did. They're marked (BH). Thanks, Bill!
130
131- Cleanup of error handling in read_super().
132  Didn't release all resources in case of an
133  error. (BH)
134
135- put_inode() releases the ext cache only if it's
136  no longer needed. (BH)
137
138- One set of dentry callbacks is enough. (BH)
139
140- Cleanup of error handling in namei.c. (BH)
141
142- Cleanup of error handling in file.c. (BH)
143
144- The original blocksize of the device is
145  restored when the fs is unmounted. (BH)
146
147- getblock() did not invalidate the key cache
148  when it allocated a new block.
149
150- Removed some unnecessary locks as Bill
151  suggested.
152
153- Simplified match_name(), changed all hashing
154  and case insensitive name comparisons to use
155  uppercase. This makes the tolower() routines
156  obsolete.
157
158- Added mount option 'mufs' to force muFS
159  uid/gid interpretation.
160
161- File mode changes were not updated on disk.
162  This was fixed before, but somehow got lost.
163
164Version 3.7
165-----------
166
167- Added dentry callbacks to allow the dcache to
168  operate case insensitive and length ignorant
169  like the affs itself.
170
171- getblock() didn't update the lastblock field in the
172  inode if the fs was not an OFS. This bug only shows
173  up if a file was enlarged via truncate() and there
174  was not enough space.
175
176- Remove some more superfluous code left over from
177  the old link days ...
178
179- Fixed some oversights which were in patch 2.1.78.
180
181- Fixed a few typos.
182
183Version 3.6
184-----------
185
186- dentry changes. (Thanks to Jes Sorensen for his help.)
187
188- Fixed bug in balloc(): Superblock was not set dirty after
189  the bitmap was changed, so the bitmap wasn't sync'd.
190
191- Fixed nasty bug in find_new_zone(): If the current
192  zone number was zero, the loop didn't terminate,
193  causing a solid lock-up.
194
195- Removed support for old-style directory reads.
196
197- Fixed bug in add_entry(): When doing a sorted insert,
198  the pointer to the next entry in the hash chain wasn't
199  correctly byte-swapped. Since most of the users of the
200  affs use it on a 68k, they didn't notice. But why did
201  I not find this during my tests?
202
203- Fixed some oversights (version wasn't updated on some
204  directory changes).
205
206- Handling of hard links rewritten. To the VFS
207  they appear now as normal Unix links. They are
208  now resolved only once in lookup(). The backside
209  is that unlink(), rename() and rmdir() have to
210  be smart about them, but the result is worth the
211  effort. This also led to some code cleanup.
212
213- Changed name type to unsigned char; the test for
214  invalid filenames didn't work correctly.
215  (Thanks to Michael Krause for pointing at this.)
216
217- Changed mapping of executable flag.
218
219- Changed all network byte-order macros to the
220  recommended ones.
221
222- Added a remount function, so attempts to remount
223  a dircache filesystem or one with errors read/write
224  can be trapped. Previously, ro remounts didn't
225  flush the super block, and rw remounts didn't
226  create allocation zones ...
227
228- Call shrink_dcache_parent() in rmdir().
229  (Thanks to Bill Hawes.)
230
231- Permission checks in unlink().
232
233- Allow mounting of volumes with superfluous
234  bitmap pointers read only, also allows them
235  to be remounted read/write.
236
237- Owner/Group defaults now to the fs user (i.e.
238  the one that mounted it) instead of root. This
239  obsoletes the mount options uid and gid.
240
241- Argument to volume option could overflow the
242  name buffer. It is now silently truncated to
243  30 characters. (Damn it! This kind of bug
244  is too embarrassing.)
245
246- Split inode.c into 2 files, the superblock
247  routines desperately wanted their own file.
248
249- truncate() didn't allocate an extension block
250  cache. If a file was extended by means of
251  truncate(), this led to an Oops.
252
253- fsuser is now checked last.
254
255- rename() will not ignore changes in filename
256  casing any more (though mv(1) still won't allow
257  you to do "mv oldname OldName").
258
259Version 3.5
260-----------
261
262- Extension block caches are now allocated on
263  demand instead of when a file is opened, as
264  files can be read and written without opening
265  them (e. g. the loopback device does this).
266
267- Removed an unused function.
268
269Version 3.4
270-----------
271
272- Hash chains are now sorted by block numbers.
273  (Thanks to Kars de Jong for finding this.)
274- Removed all unnecessary external symbols.
275
276Version 3.3
277-----------
278
279- Tried to make all types 'correct' and consistent.
280- Errors and warnings are now reported via a
281  function. They are all prefixed by a severity
282  and have the same appearance:
283    "AFFS: <function>: <error message>"
284  (There's one exception to this, as in that function
285  is no pointer to the super block available.)
286- The filesystem is remounted read-only after an
287  error.
288- The names of newly created filesystem objects are
289  now checked for validity.
290- Minor cleanups in comments.
291- Added this Changes file. At last!
292
293Version 3.2
294-----------
295
296- Extension block cache: Reading/writing of huge files
297  (several MB) is much faster (of course the added
298  overhead slows down opening, but this is hardly
299  noticeable).
300- The same get_block()-routine can now be used for
301  both OFS and FFS.
302- The super block is now searched in the block that
303  was calculated and in the one following. This
304  should remedy the round-off error introduced by
305  the 1-k blocks that Linux uses.
306- Minor changes to adhere to the new VFS interface.
307- The number of used blocks is now also calculated
308  if the filesystem is mounted read-only.
309- Prefixed some constants with AFFS_ to avoid name
310  clashes.
311- Removed 'EXPERIMENTAL' status.
312
313Version 3.1
314-----------
315
316- Fixed a nasty bug which didn't allow read-only
317  mounts.
318- Allow dir-cache filesystems to be mounted
319  read only.
320- OFS support.
321- Several other changes I just cannot remember
322  any more.
323
324Version 3.0
325-----------
326
327- Almost complete rewrite for the new VFS
328  interface in Linux 1.3.
329- Write support.
330- Support for hard and symbolic links.
331- Lots of things I remember even less ...
332
333Version 2.0
334-----------
335
336- Fixed a few things to get it compiled.
337- Automatic root block calculation.
338- Partition checker for genhd.c
339
340========================================
341
342Let's just call Ray Burr's original affs
343'Version 1.0'.
344