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1ToDo/Notes:
2 - Find and fix bugs.
3 - The only places in the kernel where a file is resized are
4 ntfs_file_write*() and ntfs_truncate() for both of which i_mutex is
5 held. Just have to be careful in read-/writepage and other helpers
6 not running under i_mutex that we play nice. Also need to be careful
7 with initialized_size extension in ntfs_file_write*() and writepage.
8 UPDATE: The only things that need to be checked are the compressed
9 write and the other attribute resize/write cases like index
10 attributes, etc. For now none of these are implemented so are safe.
11 - Implement filling in of holes in aops.c::ntfs_writepage() and its
12 helpers.
13 - Implement mft.c::sync_mft_mirror_umount(). We currently will just
14 leave the volume dirty on umount if the final iput(vol->mft_ino)
15 causes a write of any mirrored mft records due to the mft mirror
16 inode having been discarded already. Whether this can actually ever
17 happen is unclear however so it is worth waiting until someone hits
18 the problem.
19
202.1.29 - Fix a deadlock at mount time.
21
22 - During mount the VFS holds s_umount lock on the superblock. So when
23 we try to empty the journal $LogFile contents by calling
24 ntfs_attr_set() when the machine does not have much memory and the
25 journal is large ntfs_attr_set() results in the VM trying to balance
26 dirty pages which in turn tries to that the s_umount lock and thus we
27 get a deadlock. The solution is to not use ntfs_attr_set() and
28 instead do the zeroing by hand at the block level rather than page
29 cache level.
30 - Fix sparse warnings.
31
322.1.28 - Fix a deadlock.
33
34 - Fix deadlock in fs/ntfs/inode.c::ntfs_put_inode(). Thanks to Sergey
35 Vlasov for the report and detailed analysis of the deadlock. The fix
36 involved getting rid of ntfs_put_inode() altogether and hence NTFS no
37 longer has a ->put_inode super operation.
38
392.1.27 - Various bug fixes and cleanups.
40
41 - Fix two compiler warnings on Alpha. Thanks to Andrew Morton for
42 reporting them.
43 - Fix an (innocent) off-by-one error in the runlist code.
44 - Fix a buggette in an "should be impossible" case handling where we
45 continued the attribute lookup loop instead of aborting it.
46 - Use buffer_migrate_page() for the ->migratepage function of all ntfs
47 address space operations.
48 - Fix comparison of $MFT and $MFTMirr to not bail out when there are
49 unused, invalid mft records which are the same in both $MFT and
50 $MFTMirr.
51 - Add support for sparse files which have a compression unit of 0.
52 - Remove all the make_bad_inode() calls. This should only be called
53 from read inode and new inode code paths.
54 - Limit name length in fs/ntfs/unistr.c::ntfs_nlstoucs() to maximum
55 allowed by NTFS, i.e. 255 Unicode characters, not including the
56 terminating NULL (which is not stored on disk).
57 - Improve comments on file attribute flags in fs/ntfs/layout.h.
58 - Fix a bug in fs/ntfs/inode.c::ntfs_read_locked_index_inode() where we
59 forgot to update a temporary variable so loading index inodes which
60 have an index allocation attribute failed.
61 - Add a missing call to flush_dcache_mft_record_page() in
62 fs/ntfs/inode.c::ntfs_write_inode().
63 - Handle the recently introduced -ENAMETOOLONG return value from
64 fs/ntfs/unistr.c::ntfs_nlstoucs() in fs/ntfs/namei.c::ntfs_lookup().
65 - Semaphore to mutex conversion. (Ingo Molnar)
66
672.1.26 - Minor bug fixes and updates.
68
69 - Fix a potential overflow in file.c where a cast to s64 was missing in
70 a left shift of a page index.
71 - The struct inode has had its i_sem semaphore changed to a mutex named
72 i_mutex.
73 - We have struct kmem_cache now so use it instead of the typedef
74 kmem_cache_t. (Pekka Enberg)
75 - Implement support for sector sizes above 512 bytes (up to the maximum
76 supported by NTFS which is 4096 bytes).
77 - Do more detailed reporting of why we cannot mount read-write by
78 special casing the VOLUME_MODIFIED_BY_CHKDSK flag.
79 - Miscellaneous updates to layout.h.
80 - Cope with attribute list attribute having invalid flags. Windows
81 copes with this and even chkdsk does not detect or fix this so we
82 have to cope with it, too. Thanks to Pawel Kot for reporting the
83 problem.
84
852.1.25 - (Almost) fully implement write(2) and truncate(2).
86
87 - Change ntfs_map_runlist_nolock(), ntfs_attr_find_vcn_nolock() and
88 {__,}ntfs_cluster_free() to also take an optional attribute search
89 context as argument. This allows calling these functions with the
90 mft record mapped. Update all callers.
91 - Fix potential deadlock in ntfs_mft_data_extend_allocation_nolock()
92 error handling by passing in the active search context when calling
93 ntfs_cluster_free().
94 - Change ntfs_cluster_alloc() to take an extra boolean parameter
95 specifying whether the cluster are being allocated to extend an
96 attribute or to fill a hole.
97 - Change ntfs_attr_make_non_resident() to call ntfs_cluster_alloc()
98 with @is_extension set to TRUE and remove the runlist terminator
99 fixup code as this is now done by ntfs_cluster_alloc().
100 - Change ntfs_attr_make_non_resident to take the attribute value size
101 as an extra parameter. This is needed since we need to know the size
102 before we can map the mft record and our callers always know it. The
103 reason we cannot simply read the size from the vfs inode i_size is
104 that this is not necessarily uptodate. This happens when
105 ntfs_attr_make_non_resident() is called in the ->truncate call path.
106 - Fix ntfs_attr_make_non_resident() to update the vfs inode i_blocks
107 which is zero for a resident attribute but should no longer be zero
108 once the attribute is non-resident as it then has real clusters
109 allocated.
110 - Add fs/ntfs/attrib.[hc]::ntfs_attr_extend_allocation(), a function to
111 extend the allocation of an attributes. Optionally, the data size,
112 but not the initialized size can be extended, too.
113 - Implement fs/ntfs/inode.[hc]::ntfs_truncate(). It only supports
114 uncompressed and unencrypted files and it never creates sparse files
115 at least for the moment (making a file sparse requires us to modify
116 its directory entries and we do not support directory operations at
117 the moment). Also, support for highly fragmented files, i.e. ones
118 whose data attribute is split across multiple extents, is severly
119 limited. When such a case is encountered, EOPNOTSUPP is returned.
120 - Enable ATTR_SIZE attribute changes in ntfs_setattr(). This completes
121 the initial implementation of file truncation. Now both open(2)ing
122 a file with the O_TRUNC flag and the {,f}truncate(2) system calls
123 will resize a file appropriately. The limitations are that only
124 uncompressed and unencrypted files are supported. Also, there is
125 only very limited support for highly fragmented files (the ones whose
126 $DATA attribute is split into multiple attribute extents).
127 - In attrib.c::ntfs_attr_set() call balance_dirty_pages_ratelimited()
128 and cond_resched() in the main loop as we could be dirtying a lot of
129 pages and this ensures we play nice with the VM and the system as a
130 whole.
131 - Implement file operations ->write, ->aio_write, ->writev for regular
132 files. This replaces the old use of generic_file_write(), et al and
133 the address space operations ->prepare_write and ->commit_write.
134 This means that both sparse and non-sparse (unencrypted and
135 uncompressed) files can now be extended using the normal write(2)
136 code path. There are two limitations at present and these are that
137 we never create sparse files and that we only have limited support
138 for highly fragmented files, i.e. ones whose data attribute is split
139 across multiple extents. When such a case is encountered,
140 EOPNOTSUPP is returned.
141 - $EA attributes can be both resident and non-resident.
142 - Use %z for size_t to fix compilation warnings. (Andrew Morton)
143 - Fix compilation warnings with gcc-4.0.2 on SUSE 10.0.
144 - Document extended attribute ($EA) NEED_EA flag. (Based on libntfs
145 patch by Yura Pakhuchiy.)
146
1472.1.24 - Lots of bug fixes and support more clean journal states.
148
149 - Support journals ($LogFile) which have been modified by chkdsk. This
150 means users can boot into Windows after we marked the volume dirty.
151 The Windows boot will run chkdsk and then reboot. The user can then
152 immediately boot into Linux rather than having to do a full Windows
153 boot first before rebooting into Linux and we will recognize such a
154 journal and empty it as it is clean by definition. Note, this only
155 works if chkdsk left the journal in an obviously clean state.
156 - Support journals ($LogFile) with only one restart page as well as
157 journals with two different restart pages. We sanity check both and
158 either use the only sane one or the more recent one of the two in the
159 case that both are valid.
160 - Add fs/ntfs/malloc.h::ntfs_malloc_nofs_nofail() which is analogous to
161 ntfs_malloc_nofs() but it performs allocations with __GFP_NOFAIL and
162 hence cannot fail.
163 - Use ntfs_malloc_nofs_nofail() in the two critical regions in
164 fs/ntfs/runlist.c::ntfs_runlists_merge(). This means we no longer
165 need to panic() if the allocation fails as it now cannot fail.
166 - Fix two nasty runlist merging bugs that had gone unnoticed so far.
167 Thanks to Stefano Picerno for the bug report.
168 - Remove two bogus BUG_ON()s from fs/ntfs/mft.c.
169 - Fix handling of valid but empty mapping pairs array in
170 fs/ntfs/runlist.c::ntfs_mapping_pairs_decompress().
171 - Report unrepresentable inodes during ntfs_readdir() as KERN_WARNING
172 messages and include the inode number. Thanks to Yura Pakhuchiy for
173 pointing this out.
174 - Change ntfs_rl_truncate_nolock() to throw away the runlist if the new
175 length is zero.
176 - Add runlist.[hc]::ntfs_rl_punch_nolock() which punches a caller
177 specified hole into a runlist.
178 - Fix a bug in fs/ntfs/index.c::ntfs_index_lookup(). When the returned
179 index entry is in the index root, we forgot to set the @ir pointer in
180 the index context. Thanks to Yura Pakhuchiy for finding this bug.
181 - Remove bogus setting of PageError in ntfs_read_compressed_block().
182 - Add fs/ntfs/attrib.[hc]::ntfs_resident_attr_value_resize().
183 - Fix a bug in ntfs_map_runlist_nolock() where we forgot to protect
184 access to the allocated size in the ntfs inode with the size lock.
185 - Fix ntfs_attr_vcn_to_lcn_nolock() and ntfs_attr_find_vcn_nolock() to
186 return LCN_ENOENT when there is no runlist and the allocated size is
187 zero.
188 - Fix load_attribute_list() to handle the case of a NULL runlist.
189 - Fix handling of sparse attributes in ntfs_attr_make_non_resident().
190 - Add BUG() checks to ntfs_attr_make_non_resident() and ntfs_attr_set()
191 to ensure that these functions are never called for compressed or
192 encrypted attributes.
193 - Fix cluster (de)allocators to work when the runlist is NULL and more
194 importantly to take a locked runlist rather than them locking it
195 which leads to lock reversal.
196 - Truncate {a,c,m}time to the ntfs supported time granularity when
197 updating the times in the inode in ntfs_setattr().
198 - Fixup handling of sparse, compressed, and encrypted attributes in
199 fs/ntfs/inode.c::ntfs_read_locked_{,attr_,index_}inode(),
200 fs/ntfs/aops.c::ntfs_{read,write}page().
201 - Make ntfs_write_block() not instantiate sparse blocks if they contain
202 only zeroes.
203 - Optimize fs/ntfs/aops.c::ntfs_write_block() by extending the page
204 lock protection over the buffer submission for i/o which allows the
205 removal of the get_bh()/put_bh() pairs for each buffer.
206 - Fix fs/ntfs/aops.c::ntfs_{read,write}_block() to handle the case
207 where a concurrent truncate has truncated the runlist under our feet.
208 - Fix page_has_buffers()/page_buffers() handling in fs/ntfs/aops.c.
209 - In fs/ntfs/aops.c::ntfs_end_buffer_async_read(), use a bit spin lock
210 in the first buffer head instead of a driver global spin lock to
211 improve scalability.
212 - Minor fix to error handling and error message display in
213 fs/ntfs/aops.c::ntfs_prepare_nonresident_write().
214 - Change the mount options {u,f,d}mask to always parse the number as
215 an octal number to conform to how chmod(1) works, too. Thanks to
216 Giuseppe Bilotta and Horst von Brand for pointing out the errors of
217 my ways.
218 - Fix various bugs in the runlist merging code. (Based on libntfs
219 changes by Richard Russon.)
220 - Fix sparse warnings that have crept in over time.
221 - Change ntfs_cluster_free() to require a write locked runlist on entry
222 since we otherwise get into a lock reversal deadlock if a read locked
223 runlist is passed in. In the process also change it to take an ntfs
224 inode instead of a vfs inode as parameter.
225 - Fix the definition of the CHKD ntfs record magic. It had an off by
226 two error causing it to be CHKB instead of CHKD.
227 - Fix a stupid bug in __ntfs_bitmap_set_bits_in_run() which caused the
228 count to become negative and hence we had a wild memset() scribbling
229 all over the system's ram.
230
2312.1.23 - Implement extension of resident files and make writing safe as well as
232 many bug fixes, cleanups, and enhancements...
233
234 - Add printk rate limiting for ntfs_warning() and ntfs_error() when
235 compiled without debug. This avoids a possible denial of service
236 attack. Thanks to Carl-Daniel Hailfinger from SuSE for pointing this
237 out.
238 - Fix compilation warnings on ia64. (Randy Dunlap)
239 - Use i_size_{read,write}() instead of reading i_size by hand and cache
240 the value where apropriate.
241 - Add size_lock to the ntfs_inode structure. This is an rw spinlock
242 and it locks against access to the inode sizes. Note, ->size_lock
243 is also accessed from irq context so you must use the _irqsave and
244 _irqrestore lock and unlock functions, respectively. Protect all
245 accesses to allocated_size, initialized_size, and compressed_size.
246 - Minor optimization to fs/ntfs/super.c::ntfs_statfs() and its helpers.
247 - Implement extension of resident files in the regular file write code
248 paths (fs/ntfs/aops.c::ntfs_{prepare,commit}_write()). At present
249 this only works until the data attribute becomes too big for the mft
250 record after which we abort the write returning -EOPNOTSUPP from
251 ntfs_prepare_write().
252 - Add disable_sparse mount option together with a per volume sparse
253 enable bit which is set appropriately and a per inode sparse disable
254 bit which is preset on some system file inodes as appropriate.
255 - Enforce that sparse support is disabled on NTFS volumes pre 3.0.
256 - Fix a bug in fs/ntfs/runlist.c::ntfs_mapping_pairs_decompress() in
257 the creation of the unmapped runlist element for the base attribute
258 extent.
259 - Split ntfs_map_runlist() into ntfs_map_runlist() and a non-locking
260 helper ntfs_map_runlist_nolock() which is used by ntfs_map_runlist().
261 This allows us to map runlist fragments with the runlist lock already
262 held without having to drop and reacquire it around the call. Adapt
263 all callers.
264 - Change ntfs_find_vcn() to ntfs_find_vcn_nolock() which takes a locked
265 runlist. This allows us to find runlist elements with the runlist
266 lock already held without having to drop and reacquire it around the
267 call. Adapt all callers.
268 - Change time to u64 in time.h::ntfs2utc() as it otherwise generates a
269 warning in the do_div() call on sparc32. Thanks to Meelis Roos for
270 the report and analysis of the warning.
271 - Fix a nasty runlist merge bug when merging two holes.
272 - Set the ntfs_inode->allocated_size to the real allocated size in the
273 mft record for resident attributes (fs/ntfs/inode.c).
274 - Small readability cleanup to use "a" instead of "ctx->attr"
275 everywhere (fs/ntfs/inode.c).
276 - Make fs/ntfs/namei.c::ntfs_get_{parent,dentry} static and move the
277 definition of ntfs_export_ops from fs/ntfs/super.c to namei.c. Also,
278 declare ntfs_export_ops in fs/ntfs/ntfs.h.
279 - Correct sparse file handling. The compressed values need to be
280 checked and set in the ntfs inode as done for compressed files and
281 the compressed size needs to be used for vfs inode->i_blocks instead
282 of the allocated size, again, as done for compressed files.
283 - Add AT_EA in addition to AT_DATA to whitelist for being allowed to be
284 non-resident in fs/ntfs/attrib.c::ntfs_attr_can_be_non_resident().
285 - Add fs/ntfs/attrib.c::ntfs_attr_vcn_to_lcn_nolock() used by the new
286 write code.
287 - Fix bug in fs/ntfs/attrib.c::ntfs_find_vcn_nolock() where after
288 dropping the read lock and taking the write lock we were not checking
289 whether someone else did not already do the work we wanted to do.
290 - Rename fs/ntfs/attrib.c::ntfs_find_vcn_nolock() to
291 ntfs_attr_find_vcn_nolock() and update all callers.
292 - Add fs/ntfs/attrib.[hc]::ntfs_attr_make_non_resident().
293 - Fix sign of various error return values to be negative in
294 fs/ntfs/lcnalloc.c.
295 - Modify ->readpage and ->writepage (fs/ntfs/aops.c) so they detect and
296 handle the case where an attribute is converted from resident to
297 non-resident by a concurrent file write.
298 - Remove checks for NULL before calling kfree() since kfree() does the
299 checking itself. (Jesper Juhl)
300 - Some utilities modify the boot sector but do not update the checksum.
301 Thus, relax the checking in fs/ntfs/super.c::is_boot_sector_ntfs() to
302 only emit a warning when the checksum is incorrect rather than
303 refusing the mount. Thanks to Bernd Casimir for pointing this
304 problem out.
305 - Update attribute definition handling.
306 - Add NTFS_MAX_CLUSTER_SIZE and NTFS_MAX_PAGES_PER_CLUSTER constants.
307 - Use NTFS_MAX_CLUSTER_SIZE in super.c instead of hard coding 0x10000.
308 - Use MAX_BUF_PER_PAGE instead of variable sized array allocation for
309 better code generation and one less sparse warning in fs/ntfs/aops.c.
310 - Remove spurious void pointer casts from fs/ntfs/. (Pekka Enberg)
311 - Use C99 style structure initialization after memory allocation where
312 possible (fs/ntfs/{attrib.c,index.c,super.c}). Thanks to Al Viro and
313 Pekka Enberg.
314 - Stamp the transaction log ($UsnJrnl), aka user space journal, if it
315 is active on the volume and we are mounting read-write or remounting
316 from read-only to read-write.
317 - Fix a bug in address space operations error recovery code paths where
318 if the runlist was not mapped at all and a mapping error occured we
319 would leave the runlist locked on exit to the function so that the
320 next access to the same file would try to take the lock and deadlock.
321 - Detect the case when Windows has been suspended to disk on the volume
322 to be mounted and if this is the case do not allow (re)mounting
323 read-write. This is done by parsing hiberfil.sys if present.
324 - Fix several occurences of a bug where we would perform 'var & ~const'
325 with a 64-bit variable and a int, i.e. 32-bit, constant. This causes
326 the higher order 32-bits of the 64-bit variable to be zeroed. To fix
327 this cast the 'const' to the same 64-bit type as 'var'.
328 - Change the runlist terminator of the newly allocated cluster(s) to
329 LCN_ENOENT in ntfs_attr_make_non_resident(). Otherwise the runlist
330 code gets confused.
331 - Add an extra parameter @last_vcn to ntfs_get_size_for_mapping_pairs()
332 and ntfs_mapping_pairs_build() to allow the runlist encoding to be
333 partial which is desirable when filling holes in sparse attributes.
334 Update all callers.
335 - Change ntfs_map_runlist_nolock() to only decompress the mapping pairs
336 if the requested vcn is inside it. Otherwise we get into problems
337 when we try to map an out of bounds vcn because we then try to map
338 the already mapped runlist fragment which causes
339 ntfs_mapping_pairs_decompress() to fail and return error. Update
340 ntfs_attr_find_vcn_nolock() accordingly.
341 - Fix a nasty deadlock that appeared in recent kernels.
342 The situation: VFS inode X on a mounted ntfs volume is dirty. For
343 same inode X, the ntfs_inode is dirty and thus corresponding on-disk
344 inode, i.e. mft record, which is in a dirty PAGE_CACHE_PAGE belonging
345 to the table of inodes, i.e. $MFT, inode 0.
346 What happens:
347 Process 1: sys_sync()/umount()/whatever... calls
348 __sync_single_inode() for $MFT -> do_writepages() -> write_page for
349 the dirty page containing the on-disk inode X, the page is now locked
350 -> ntfs_write_mst_block() which clears PageUptodate() on the page to
351 prevent anyone else getting hold of it whilst it does the write out.
352 This is necessary as the on-disk inode needs "fixups" applied before
353 the write to disk which are removed again after the write and
354 PageUptodate is then set again. It then analyses the page looking
355 for dirty on-disk inodes and when it finds one it calls
356 ntfs_may_write_mft_record() to see if it is safe to write this
357 on-disk inode. This then calls ilookup5() to check if the
358 corresponding VFS inode is in icache(). This in turn calls ifind()
359 which waits on the inode lock via wait_on_inode whilst holding the
360 global inode_lock.
361 Process 2: pdflush results in a call to __sync_single_inode for the
362 same VFS inode X on the ntfs volume. This locks the inode (I_LOCK)
363 then calls write-inode -> ntfs_write_inode -> map_mft_record() ->
364 read_cache_page() for the page (in page cache of table of inodes
365 $MFT, inode 0) containing the on-disk inode. This page has
366 PageUptodate() clear because of Process 1 (see above) so
367 read_cache_page() blocks when it tries to take the page lock for the
368 page so it can call ntfs_read_page().
369 Thus Process 1 is holding the page lock on the page containing the
370 on-disk inode X and it is waiting on the inode X to be unlocked in
371 ifind() so it can write the page out and then unlock the page.
372 And Process 2 is holding the inode lock on inode X and is waiting for
373 the page to be unlocked so it can call ntfs_readpage() or discover
374 that Process 1 set PageUptodate() again and use the page.
375 Thus we have a deadlock due to ifind() waiting on the inode lock.
376 The solution: The fix is to use the newly introduced
377 ilookup5_nowait() which does not wait on the inode's lock and hence
378 avoids the deadlock. This is safe as we do not care about the VFS
379 inode and only use the fact that it is in the VFS inode cache and the
380 fact that the vfs and ntfs inodes are one struct in memory to find
381 the ntfs inode in memory if present. Also, the ntfs inode has its
382 own locking so it does not matter if the vfs inode is locked.
383 - Fix bug in mft record writing where we forgot to set the device in
384 the buffers when mapping them after the VM had discarded them.
385 Thanks to Martin MOKREJÅ for the bug report.
386
3872.1.22 - Many bug and race fixes and error handling improvements.
388
389 - Improve error handling in fs/ntfs/inode.c::ntfs_truncate().
390 - Change fs/ntfs/inode.c::ntfs_truncate() to return an error code
391 instead of void and provide a helper ntfs_truncate_vfs() for the
392 vfs ->truncate method.
393 - Add a new ntfs inode flag NInoTruncateFailed() and modify
394 fs/ntfs/inode.c::ntfs_truncate() to set and clear it appropriately.
395 - Fix min_size and max_size definitions in ATTR_DEF structure in
396 fs/ntfs/layout.h to be signed.
397 - Add attribute definition handling helpers to fs/ntfs/attrib.[hc]:
398 ntfs_attr_size_bounds_check(), ntfs_attr_can_be_non_resident(), and
399 ntfs_attr_can_be_resident(), which in turn use the new private helper
400 ntfs_attr_find_in_attrdef().
401 - In fs/ntfs/aops.c::mark_ntfs_record_dirty(), take the
402 mapping->private_lock around the dirtying of the buffer heads
403 analagous to the way it is done in __set_page_dirty_buffers().
404 - Ensure the mft record size does not exceed the PAGE_CACHE_SIZE at
405 mount time as this cannot work with the current implementation.
406 - Check for location of attribute name and improve error handling in
407 general in fs/ntfs/inode.c::ntfs_read_locked_inode() and friends.
408 - In fs/ntfs/aops.c::ntfs_writepage(), if the page is fully outside
409 i_size, i.e. race with truncate, invalidate the buffers on the page
410 so that they become freeable and hence the page does not leak.
411 - Remove unused function fs/ntfs/runlist.c::ntfs_rl_merge(). (Adrian
412 Bunk)
413 - Fix stupid bug in fs/ntfs/attrib.c::ntfs_attr_find() that resulted in
414 a NULL pointer dereference in the error code path when a corrupt
415 attribute was found. (Thanks to Domen Puncer for the bug report.)
416 - Add MODULE_VERSION() to fs/ntfs/super.c.
417 - Make several functions and variables static. (Adrian Bunk)
418 - Modify fs/ntfs/aops.c::mark_ntfs_record_dirty() so it allocates
419 buffers for the page if they are not present and then marks the
420 buffers belonging to the ntfs record dirty. This causes the buffers
421 to become busy and hence they are safe from removal until the page
422 has been written out.
423 - Fix stupid bug in fs/ntfs/attrib.c::ntfs_external_attr_find() in the
424 error handling code path that resulted in a BUG() due to trying to
425 unmap an extent mft record when the mapping of it had failed and it
426 thus was not mapped. (Thanks to Ken MacFerrin for the bug report.)
427 - Drop the runlist lock after the vcn has been read in
428 fs/ntfs/lcnalloc.c::__ntfs_cluster_free().
429 - Rewrite handling of multi sector transfer errors. We now do not set
430 PageError() when such errors are detected in the async i/o handler
431 fs/ntfs/aops.c::ntfs_end_buffer_async_read(). All users of mst
432 protected attributes now check the magic of each ntfs record as they
433 use it and act appropriately. This has the effect of making errors
434 granular per ntfs record rather than per page which solves the case
435 where we cannot access any of the ntfs records in a page when a
436 single one of them had an mst error. (Thanks to Ken MacFerrin for
437 the bug report.)
438 - Fix error handling in fs/ntfs/quota.c::ntfs_mark_quotas_out_of_date()
439 where we failed to release i_mutex on the $Quota/$Q attribute inode.
440 - Fix bug in handling of bad inodes in fs/ntfs/namei.c::ntfs_lookup().
441 - Add mapping of unmapped buffers to all remaining code paths, i.e.
442 fs/ntfs/aops.c::ntfs_write_mst_block(), mft.c::ntfs_sync_mft_mirror(),
443 and write_mft_record_nolock(). From now on we require that the
444 complete runlist for the mft mirror is always mapped into memory.
445 - Add creation of buffers to fs/ntfs/mft.c::ntfs_sync_mft_mirror().
446 - Improve error handling in fs/ntfs/aops.c::ntfs_{read,write}_block().
447 - Cleanup fs/ntfs/aops.c::ntfs_{read,write}page() since we know that a
448 resident attribute will be smaller than a page which makes the code
449 simpler. Also make the code more tolerant to concurrent ->truncate.
450
4512.1.21 - Fix some races and bugs, rewrite mft write code, add mft allocator.
452
453 - Implement extent mft record deallocation
454 fs/ntfs/mft.c::ntfs_extent_mft_record_free().
455 - Splitt runlist related functions off from attrib.[hc] to runlist.[hc].
456 - Add vol->mft_data_pos and initialize it at mount time.
457 - Rename init_runlist() to ntfs_init_runlist(), ntfs_vcn_to_lcn() to
458 ntfs_rl_vcn_to_lcn(), decompress_mapping_pairs() to
459 ntfs_mapping_pairs_decompress(), ntfs_merge_runlists() to
460 ntfs_runlists_merge() and adapt all callers.
461 - Add fs/ntfs/runlist.[hc]::ntfs_get_nr_significant_bytes(),
462 ntfs_get_size_for_mapping_pairs(), ntfs_write_significant_bytes(),
463 and ntfs_mapping_pairs_build(), adapted from libntfs.
464 - Make fs/ntfs/lcnalloc.c::ntfs_cluster_free_from_rl_nolock() not
465 static and add a declaration for it to lcnalloc.h.
466 - Add fs/ntfs/lcnalloc.h::ntfs_cluster_free_from_rl() which is a static
467 inline wrapper for ntfs_cluster_free_from_rl_nolock() which takes the
468 cluster bitmap lock for the duration of the call.
469 - Add fs/ntfs/attrib.[hc]::ntfs_attr_record_resize().
470 - Implement the equivalent of memset() for an ntfs attribute in
471 fs/ntfs/attrib.[hc]::ntfs_attr_set() and switch
472 fs/ntfs/logfile.c::ntfs_empty_logfile() to using it.
473 - Remove unnecessary casts from LCN_* constants.
474 - Implement fs/ntfs/runlist.c::ntfs_rl_truncate_nolock().
475 - Add MFT_RECORD_OLD as a copy of MFT_RECORD in fs/ntfs/layout.h and
476 change MFT_RECORD to contain the NTFS 3.1+ specific fields.
477 - Add a helper function fs/ntfs/aops.c::mark_ntfs_record_dirty() which
478 marks all buffers belonging to an ntfs record dirty, followed by
479 marking the page the ntfs record is in dirty and also marking the vfs
480 inode containing the ntfs record dirty (I_DIRTY_PAGES).
481 - Switch fs/ntfs/index.h::ntfs_index_entry_mark_dirty() to using the
482 new helper fs/ntfs/aops.c::mark_ntfs_record_dirty() and remove the no
483 longer needed fs/ntfs/index.[hc]::__ntfs_index_entry_mark_dirty().
484 - Move ntfs_{un,}map_page() from ntfs.h to aops.h and fix resulting
485 include errors.
486 - Move the typedefs for runlist_element and runlist from types.h to
487 runlist.h and fix resulting include errors.
488 - Remove unused {__,}format_mft_record() from fs/ntfs/mft.c.
489 - Modify fs/ntfs/mft.c::__mark_mft_record_dirty() to use the helper
490 mark_ntfs_record_dirty() which also changes the behaviour in that we
491 now set the buffers belonging to the mft record dirty as well as the
492 page itself.
493 - Update fs/ntfs/mft.c::write_mft_record_nolock() and sync_mft_mirror()
494 to cope with the fact that there now are dirty buffers in mft pages.
495 - Update fs/ntfs/inode.c::ntfs_write_inode() to also use the helper
496 mark_ntfs_record_dirty() and thus to set the buffers belonging to the
497 mft record dirty as well as the page itself.
498 - Fix compiler warnings on x86-64 in fs/ntfs/dir.c. (Randy Dunlap,
499 slightly modified by me)
500 - Add fs/ntfs/mft.c::try_map_mft_record() which fails with -EALREADY if
501 the mft record is already locked and otherwise behaves the same way
502 as fs/ntfs/mft.c::map_mft_record().
503 - Modify fs/ntfs/mft.c::write_mft_record_nolock() so that it only
504 writes the mft record if the buffers belonging to it are dirty.
505 Otherwise we assume that it was written out by other means already.
506 - Attempting to write outside initialized size is _not_ a bug so remove
507 the bug check from fs/ntfs/aops.c::ntfs_write_mst_block(). It is in
508 fact required to write outside initialized size when preparing to
509 extend the initialized size.
510 - Map the page instead of using page_address() before writing to it in
511 fs/ntfs/aops.c::ntfs_mft_writepage().
512 - Provide exclusion between opening an inode / mapping an mft record
513 and accessing the mft record in fs/ntfs/mft.c::ntfs_mft_writepage()
514 by setting the page not uptodate throughout ntfs_mft_writepage().
515 - Clear the page uptodate flag in fs/ntfs/aops.c::ntfs_write_mst_block()
516 to ensure noone can see the page whilst the mst fixups are applied.
517 - Add the helper fs/ntfs/mft.c::ntfs_may_write_mft_record() which
518 checks if an mft record may be written out safely obtaining any
519 necessary locks in the process. This is used by
520 fs/ntfs/aops.c::ntfs_write_mst_block().
521 - Modify fs/ntfs/aops.c::ntfs_write_mst_block() to also work for
522 writing mft records and improve its error handling in the process.
523 Now if any of the records in the page fail to be written out, all
524 other records will be written out instead of aborting completely.
525 - Remove ntfs_mft_aops and update all users to use ntfs_mst_aops.
526 - Modify fs/ntfs/inode.c::ntfs_read_locked_inode() to set the
527 ntfs_mst_aops for all inodes which are NInoMstProtected() and
528 ntfs_aops for all other inodes.
529 - Rename fs/ntfs/mft.c::sync_mft_mirror{,_umount}() to
530 ntfs_sync_mft_mirror{,_umount}() and change their parameters so they
531 no longer require an ntfs inode to be present. Update all callers.
532 - Cleanup the error handling in fs/ntfs/mft.c::ntfs_sync_mft_mirror().
533 - Clear the page uptodate flag in fs/ntfs/mft.c::ntfs_sync_mft_mirror()
534 to ensure noone can see the page whilst the mst fixups are applied.
535 - Remove the no longer needed fs/ntfs/mft.c::ntfs_mft_writepage() and
536 fs/ntfs/mft.c::try_map_mft_record().
537 - Fix callers of fs/ntfs/aops.c::mark_ntfs_record_dirty() to call it
538 with the ntfs inode which contains the page rather than the ntfs
539 inode the mft record of which is in the page.
540 - Fix race condition in fs/ntfs/inode.c::ntfs_put_inode() by moving the
541 index inode bitmap inode release code from there to
542 fs/ntfs/inode.c::ntfs_clear_big_inode(). (Thanks to Christoph
543 Hellwig for spotting this.)
544 - Fix race condition in fs/ntfs/inode.c::ntfs_put_inode() by taking the
545 inode semaphore around the code that sets ni->itype.index.bmp_ino to
546 NULL and reorganize the code to optimize it a bit. (Thanks to
547 Christoph Hellwig for spotting this.)
548 - Modify fs/ntfs/aops.c::mark_ntfs_record_dirty() to no longer take the
549 ntfs inode as a parameter as this is confusing and misleading and the
550 needed ntfs inode is available via NTFS_I(page->mapping->host).
551 Adapt all callers to this change.
552 - Modify fs/ntfs/mft.c::write_mft_record_nolock() and
553 fs/ntfs/aops.c::ntfs_write_mst_block() to only check the dirty state
554 of the first buffer in a record and to take this as the ntfs record
555 dirty state. We cannot look at the dirty state for subsequent
556 buffers because we might be racing with
557 fs/ntfs/aops.c::mark_ntfs_record_dirty().
558 - Move the static inline ntfs_init_big_inode() from fs/ntfs/inode.c to
559 inode.h and make fs/ntfs/inode.c::__ntfs_init_inode() non-static and
560 add a declaration for it to inode.h. Fix some compilation issues
561 that resulted due to #includes and header file interdependencies.
562 - Simplify setup of i_mode in fs/ntfs/inode.c::ntfs_read_locked_inode().
563 - Add helpers fs/ntfs/layout.h::MK_MREF() and MK_LE_MREF().
564 - Modify fs/ntfs/mft.c::map_extent_mft_record() to only verify the mft
565 record sequence number if it is specified (i.e. not zero).
566 - Add fs/ntfs/mft.[hc]::ntfs_mft_record_alloc() and various helper
567 functions used by it.
568 - Update Documentation/filesystems/ntfs.txt with instructions on how to
569 use the Device-Mapper driver with NTFS ftdisk/LDM raid. This removes
570 the linear raid problem with the Software RAID / MD driver when one
571 or more of the devices has an odd number of sectors.
572
5732.1.20 - Fix two stupid bugs introduced in 2.1.18 release.
574
575 - Fix stupid bug in fs/ntfs/attrib.c::ntfs_attr_reinit_search_ctx()
576 where we did not clear ctx->al_entry but it was still set due to
577 changes in ntfs_attr_lookup() and ntfs_external_attr_find() in
578 particular.
579 - Fix another stupid bug in fs/ntfs/attrib.c::ntfs_external_attr_find()
580 where we forgot to unmap the extent mft record when we had finished
581 enumerating an attribute which caused a bug check to trigger when the
582 VFS calls ->clear_inode.
583
5842.1.19 - Many cleanups, improvements, and a minor bug fix.
585
586 - Update ->setattr (fs/ntfs/inode.c::ntfs_setattr()) to refuse to
587 change the uid, gid, and mode of an inode as we do not support NTFS
588 ACLs yet.
589 - Remove BKL use from ntfs_setattr() syncing up with the rest of the
590 kernel.
591 - Get rid of the ugly transparent union in fs/ntfs/dir.c::ntfs_readdir()
592 and ntfs_filldir() as per suggestion from Al Viro.
593 - Change '\0' and L'\0' to simply 0 as per advice from Linus Torvalds.
594 - Update ->truncate (fs/ntfs/inode.c::ntfs_truncate()) to check if the
595 inode size has changed and to only output an error if so.
596 - Rename fs/ntfs/attrib.h::attribute_value_length() to ntfs_attr_size().
597 - Add le{16,32,64} as well as sle{16,32,64} data types to
598 fs/ntfs/types.h.
599 - Change ntfschar to be le16 instead of u16 in fs/ntfs/types.h.
600 - Add le versions of VCN, LCN, and LSN called leVCN, leLCN, and leLSN,
601 respectively, to fs/ntfs/types.h.
602 - Update endianness conversion macros in fs/ntfs/endian.h to use the
603 new types as appropriate.
604 - Do proper type casting when using sle64_to_cpup() in fs/ntfs/dir.c
605 and index.c.
606 - Add leMFT_REF data type to fs/ntfs/layout.h.
607 - Update all NTFS header files with the new little endian data types.
608 Affected files are fs/ntfs/layout.h, logfile.h, and time.h.
609 - Do proper type casting when using ntfs_is_*_recordp() in
610 fs/ntfs/logfile.c, mft.c, and super.c.
611 - Fix all the sparse bitwise warnings. Had to change all the typedef
612 enums storing little endian values to simple enums plus a typedef for
613 the datatype to make sparse happy.
614 - Fix a bug found by the new sparse bitwise warnings where the default
615 upcase table was defined as a pointer to wchar_t rather than ntfschar
616 in fs/ntfs/ntfs.h and super.c.
617 - Change {const_,}cpu_to_le{16,32}(0) to just 0 as suggested by Al Viro.
618
6192.1.18 - Fix scheduling latencies at mount time as well as an endianness bug.
620
621 - Remove vol->nr_mft_records as it was pretty meaningless and optimize
622 the calculation of total/free inodes as used by statfs().
623 - Fix scheduling latencies in ntfs_fill_super() by dropping the BKL
624 because the code itself is using the ntfs_lock semaphore which
625 provides safe locking. (Ingo Molnar)
626 - Fix a potential bug in fs/ntfs/mft.c::map_extent_mft_record() that
627 could occur in the future for when we start closing/freeing extent
628 inodes if we don't set base_ni->ext.extent_ntfs_inos to NULL after
629 we free it.
630 - Rename {find,lookup}_attr() to ntfs_attr_{find,lookup}() as well as
631 find_external_attr() to ntfs_external_attr_find() to cleanup the
632 namespace a bit and to be more consistent with libntfs.
633 - Rename {{re,}init,get,put}_attr_search_ctx() to
634 ntfs_attr_{{re,}init,get,put}_search_ctx() as well as the type
635 attr_search_context to ntfs_attr_search_ctx.
636 - Force use of ntfs_attr_find() in ntfs_attr_lookup() when searching
637 for the attribute list attribute itself.
638 - Fix endianness bug in ntfs_external_attr_find().
639 - Change ntfs_{external_,}attr_find() to return 0 on success, -ENOENT
640 if the attribute is not found, and -EIO on real error. In the case
641 of -ENOENT, the search context is updated to describe the attribute
642 before which the attribute being searched for would need to be
643 inserted if such an action were to be desired and in the case of
644 ntfs_external_attr_find() the search context is also updated to
645 indicate the attribute list entry before which the attribute list
646 entry of the attribute being searched for would need to be inserted
647 if such an action were to be desired. Also make ntfs_find_attr()
648 static and remove its prototype from attrib.h as it is not used
649 anywhere other than attrib.c. Update ntfs_attr_lookup() and all
650 callers of ntfs_{external,}attr_{find,lookup}() for the new return
651 values.
652 - Minor cleanup of fs/ntfs/inode.c::ntfs_init_locked_inode().
653
6542.1.17 - Fix bugs in mount time error code paths and other updates.
655
656 - Implement bitmap modification code (fs/ntfs/bitmap.[hc]). This
657 includes functions to set/clear a single bit or a run of bits.
658 - Add fs/ntfs/attrib.[hc]::ntfs_find_vcn() which returns the locked
659 runlist element containing a particular vcn. It also takes care of
660 mapping any needed runlist fragments.
661 - Implement cluster (de-)allocation code (fs/ntfs/lcnalloc.[hc]).
662 - Load attribute definition table from $AttrDef at mount time.
663 - Fix bugs in mount time error code paths involving (de)allocation of
664 the default and volume upcase tables.
665 - Remove ntfs_nr_mounts as it is no longer used.
666
6672.1.16 - Implement access time updates, file sync, async io, and read/writev.
668
669 - Add support for readv/writev and aio_read/aio_write (fs/ntfs/file.c).
670 This is done by setting the appropriate file operations pointers to
671 the generic helper functions provided by mm/filemap.c.
672 - Implement fsync, fdatasync, and msync both for files (fs/ntfs/file.c)
673 and directories (fs/ntfs/dir.c).
674 - Add support for {a,m,c}time updates to inode.c::ntfs_write_inode().
675 Note, except for the root directory and any other system files opened
676 by the user, the system files will not have their access times
677 updated as they are only accessed at the inode level an hence the
678 file level functions which cause the times to be updated are never
679 invoked.
680
6812.1.15 - Invalidate quotas when (re)mounting read-write.
682
683 - Add new element itype.index.collation_rule to the ntfs inode
684 structure and set it appropriately in ntfs_read_locked_inode().
685 - Implement a new inode type "index" to allow efficient access to the
686 indices found in various system files and adapt inode handling
687 accordingly (fs/ntfs/inode.[hc]). An index inode is essentially an
688 attribute inode (NInoAttr() is true) with an attribute type of
689 AT_INDEX_ALLOCATION. As such, it is no longer allowed to call
690 ntfs_attr_iget() with an attribute type of AT_INDEX_ALLOCATION as
691 there would be no way to distinguish between normal attribute inodes
692 and index inodes. The function to obtain an index inode is
693 ntfs_index_iget() and it uses the helper function
694 ntfs_read_locked_index_inode(). Note, we do not overload
695 ntfs_attr_iget() as indices consist of multiple attributes so using
696 ntfs_attr_iget() to obtain an index inode would be confusing.
697 - Ensure that there is no overflow when doing page->index <<
698 PAGE_CACHE_SHIFT by casting page->index to s64 in fs/ntfs/aops.c.
699 - Use atomic kmap instead of kmap() in fs/ntfs/aops.c::ntfs_read_page()
700 and ntfs_read_block().
701 - Use case sensitive attribute lookups instead of case insensitive ones.
702 - Lock all page cache pages belonging to mst protected attributes while
703 accessing them to ensure we never see corrupt data while the page is
704 under writeout.
705 - Add framework for generic ntfs collation (fs/ntfs/collation.[hc]).
706 We have ntfs_is_collation_rule_supported() to check if the collation
707 rule you want to use is supported and ntfs_collation() which actually
708 collates two data items. We currently only support COLLATION_BINARY
709 and COLLATION_NTOFS_ULONG but support for other collation rules will
710 be added as the need arises.
711 - Add a new type, ntfs_index_context, to allow retrieval of an index
712 entry using the corresponding index key. To get an index context,
713 use ntfs_index_ctx_get() and to release it, use ntfs_index_ctx_put().
714 This also adds a new slab cache for the index contexts. To lookup a
715 key in an index inode, use ntfs_index_lookup(). After modifying an
716 index entry, call ntfs_index_entry_flush_dcache_page() followed by
717 ntfs_index_entry_mark_dirty() to ensure the changes are written out
718 to disk. For details see fs/ntfs/index.[hc]. Note, at present, if
719 an index entry is in the index allocation attribute rather than the
720 index root attribute it will not be written out (you will get a
721 warning message about discarded changes instead).
722 - Load the quota file ($Quota) and check if quota tracking is enabled
723 and if so, mark the quotas out of date. This causes windows to
724 rescan the volume on boot and update all quota entries.
725 - Add a set_page_dirty address space operation for ntfs_m[fs]t_aops.
726 It is simply set to __set_page_dirty_nobuffers() to make sure that
727 running set_page_dirty() on a page containing mft/ntfs records will
728 not affect the dirty state of the page buffers.
729 - Add fs/ntfs/index.c::__ntfs_index_entry_mark_dirty() which sets all
730 buffers that are inside the ntfs record in the page dirty after which
731 it sets the page dirty. This allows ->writepage to only write the
732 dirty index records rather than having to write all the records in
733 the page. Modify fs/ntfs/index.h::ntfs_index_entry_mark_dirty() to
734 use this rather than __set_page_dirty_nobuffers().
735 - Implement fs/ntfs/aops.c::ntfs_write_mst_block() which enables the
736 writing of page cache pages belonging to mst protected attributes
737 like the index allocation attribute in directory indices and other
738 indices like $Quota/$Q, etc. This means that the quota is now marked
739 out of date on all volumes rather than only on ones where the quota
740 defaults entry is in the index root attribute of the $Quota/$Q index.
741
7422.1.14 - Fix an NFSd caused deadlock reported by several users.
743
744 - Modify fs/ntfs/ntfs_readdir() to copy the index root attribute value
745 to a buffer so that we can put the search context and unmap the mft
746 record before calling the filldir() callback. We need to do this
747 because of NFSd which calls ->lookup() from its filldir callback()
748 and this causes NTFS to deadlock as ntfs_lookup() maps the mft record
749 of the directory and since ntfs_readdir() has got it mapped already
750 ntfs_lookup() deadlocks.
751
7522.1.13 - Enable overwriting of resident files and housekeeping of system files.
753
754 - Implement writing of mft records (fs/ntfs/mft.[hc]), which includes
755 keeping the mft mirror in sync with the mft when mirrored mft records
756 are written. The functions are write_mft_record{,_nolock}(). The
757 implementation is quite rudimentary for now with lots of things not
758 implemented yet but I am not sure any of them can actually occur so
759 I will wait for people to hit each one and only then implement it.
760 - Commit open system inodes at umount time. This should make it
761 virtually impossible for sync_mft_mirror_umount() to ever be needed.
762 - Implement ->write_inode (fs/ntfs/inode.c::ntfs_write_inode()) for the
763 ntfs super operations. This gives us inode writing via the VFS inode
764 dirty code paths. Note: Access time updates are not implemented yet.
765 - Implement fs/ntfs/mft.[hc]::{,__}mark_mft_record_dirty() and make
766 fs/ntfs/aops.c::ntfs_writepage() and ntfs_commit_write() use it, thus
767 finally enabling resident file overwrite! (-8 This also includes a
768 placeholder for ->writepage (ntfs_mft_writepage()), which for now
769 just redirties the page and returns. Also, at umount time, we for
770 now throw away all mft data page cache pages after the last call to
771 ntfs_commit_inode() in the hope that all inodes will have been
772 written out by then and hence no dirty (meta)data will be lost. We
773 also check for this case and emit an error message telling the user
774 to run chkdsk.
775 - Use set_page_writeback() and end_page_writeback() in the resident
776 attribute code path of fs/ntfs/aops.c::ntfs_writepage() otherwise
777 the radix-tree tag PAGECACHE_TAG_DIRTY remains set even though the
778 page is clean.
779 - Implement ntfs_mft_writepage() so it now checks if any of the mft
780 records in the page are dirty and if so redirties the page and
781 returns. Otherwise it just returns (after doing set_page_writeback(),
782 unlock_page(), end_page_writeback() or the radix-tree tag
783 PAGECACHE_TAG_DIRTY remains set even though the page is clean), thus
784 alowing the VM to do with the page as it pleases. Also, at umount
785 time, now only throw away dirty mft (meta)data pages if dirty inodes
786 are present and ask the user to email us if they see this happening.
787 - Add functions ntfs_{clear,set}_volume_flags(), to modify the volume
788 information flags (fs/ntfs/super.c).
789 - Mark the volume dirty when (re)mounting read-write and mark it clean
790 when unmounting or remounting read-only. If any volume errors are
791 found, the volume is left marked dirty to force chkdsk to run.
792 - Add code to set the NT4 compatibility flag when (re)mounting
793 read-write for newer NTFS versions but leave it commented out for now
794 since we do not make any modifications that are NTFS 1.2 specific yet
795 and since setting this flag breaks Captive-NTFS which is not nice.
796 This code must be enabled once we start writing NTFS 1.2 specific
797 changes otherwise Windows NTFS driver might crash / cause corruption.
798
7992.1.12 - Fix the second fix to the decompression engine and some cleanups.
800
801 - Add a new address space operations struct, ntfs_mst_aops, for mst
802 protected attributes. This is because the default ntfs_aops do not
803 make sense with mst protected data and were they to write anything to
804 such an attribute they would cause data corruption so we provide
805 ntfs_mst_aops which does not have any write related operations set.
806 - Cleanup dirty ntfs inode handling (fs/ntfs/inode.[hc]) which also
807 includes an adapted ntfs_commit_inode() and an implementation of
808 ntfs_write_inode() which for now just cleans dirty inodes without
809 writing them (it does emit a warning that this is happening).
810 - Undo the second decompression engine fix (see 2.1.9 release ChangeLog
811 entry) as it was only fixing a theoretical bug but at the same time
812 it badly broke the handling of sparse and uncompressed compression
813 blocks.
814
8152.1.11 - Driver internal cleanups.
816
817 - Only build logfile.o if building the driver with read-write support.
818 - Really final white space cleanups.
819 - Use generic_ffs() instead of ffs() in logfile.c which allows the
820 log_page_size variable to be optimized by gcc into a constant.
821 - Rename uchar_t to ntfschar everywhere as uchar_t is unsigned 1-byte
822 char as defined by POSIX and as found on some systems.
823
8242.1.10 - Force read-only (re)mounting of volumes with unsupported volume flags.
825
826 - Finish off the white space cleanups (remove trailing spaces, etc).
827 - Clean up ntfs_fill_super() and ntfs_read_inode_mount() by removing
828 the kludges around the first iget(). Instead of (re)setting ->s_op
829 we have the $MFT inode set up by explicit new_inode() / set ->i_ino /
830 insert_inode_hash() / call ntfs_read_inode_mount() directly. This
831 kills the need for second super_operations and allows to return error
832 from ntfs_read_inode_mount() without resorting to ugly "poisoning"
833 tricks. (Al Viro)
834 - Force read-only (re)mounting if any of the following bits are set in
835 the volume information flags:
836 VOLUME_IS_DIRTY, VOLUME_RESIZE_LOG_FILE,
837 VOLUME_UPGRADE_ON_MOUNT, VOLUME_DELETE_USN_UNDERWAY,
838 VOLUME_REPAIR_OBJECT_ID, VOLUME_MODIFIED_BY_CHKDSK
839 To make this easier we define VOLUME_MUST_MOUNT_RO_MASK with all the
840 above bits set so the test is made easy.
841
8422.1.9 - Fix two bugs in decompression engine.
843
844 - Fix a bug where we would not always detect that we have reached the
845 end of a compression block because we were ending at minus one byte
846 which is effectively the same as being at the end. The fix is to
847 check whether the uncompressed buffer has been fully filled and if so
848 we assume we have reached the end of the compression block. A big
849 thank you to Marcin Gibuła for the bug report, the assistance in
850 tracking down the bug and testing the fix.
851 - Fix a possible bug where when a compressed read is truncated to the
852 end of the file, the offset inside the last page was not truncated.
853
8542.1.8 - Handle $MFT mirror and $LogFile, improve time handling, and cleanups.
855
856 - Use get_bh() instead of manual atomic_inc() in fs/ntfs/compress.c.
857 - Modify fs/ntfs/time.c::ntfs2utc(), get_current_ntfs_time(), and
858 utc2ntfs() to work with struct timespec instead of time_t on the
859 Linux UTC time side thus preserving the full precision of the NTFS
860 time and only loosing up to 99 nano-seconds in the Linux UTC time.
861 - Move fs/ntfs/time.c to fs/ntfs/time.h and make the time functions
862 static inline.
863 - Remove unused ntfs_dirty_inode().
864 - Cleanup super operations declaration in fs/ntfs/super.c.
865 - Wrap flush_dcache_mft_record_page() in #ifdef NTFS_RW.
866 - Add NInoTestSetFoo() and NInoTestClearFoo() macro magic to
867 fs/ntfs/inode.h and use it to declare NInoTest{Set,Clear}Dirty.
868 - Move typedefs for ntfs_attr and test_t from fs/ntfs/inode.c to
869 fs/ntfs/inode.h so they can be used elsewhere.
870 - Determine the mft mirror size as the number of mirrored mft records
871 and store it in ntfs_volume->mftmirr_size (fs/ntfs/super.c).
872 - Load the mft mirror at mount time and compare the mft records stored
873 in it to the ones in the mft. Force a read-only mount if the two do
874 not match (fs/ntfs/super.c).
875 - Fix type casting related warnings on 64-bit architectures. Thanks
876 to Meelis Roos for reporting them.
877 - Move %L to %ll as %L is floating point and %ll is integer which is
878 what we want.
879 - Read the journal ($LogFile) and determine if the volume has been
880 shutdown cleanly and force a read-only mount if not (fs/ntfs/super.c
881 and fs/ntfs/logfile.c). This is a little bit of a crude check in
882 that we only look at the restart areas and not at the actual log
883 records so that there will be a very small number of cases where we
884 think that a volume is dirty when in fact it is clean. This should
885 only affect volumes that have not been shutdown cleanly and did not
886 have any pending, non-check-pointed i/o.
887 - If the $LogFile indicates a clean shutdown and a read-write (re)mount
888 is requested, empty $LogFile by overwriting it with 0xff bytes to
889 ensure that Windows cannot cause data corruption by replaying a stale
890 journal after Linux has written to the volume.
891
8922.1.7 - Enable NFS exporting of mounted NTFS volumes.
893
894 - Set i_generation in the VFS inode from the seq_no of the NTFS inode.
895 - Make ntfs_lookup() NFS export safe, i.e. use d_splice_alias(), etc.
896 - Implement ->get_dentry() in fs/ntfs/namei.c::ntfs_get_dentry() as the
897 default doesn't allow inode number 0 which is a valid inode on NTFS
898 and even if it did allow that it uses iget() instead of ntfs_iget()
899 which makes it useless for us.
900 - Implement ->get_parent() in fs/ntfs/namei.c::ntfs_get_parent() as the
901 default just returns -EACCES which is not very useful.
902 - Define export operations (->s_export_op) for NTFS (ntfs_export_ops)
903 and set them up in the super block at mount time (super.c) this
904 allows mounted NTFS volumes to be exported via NFS.
905 - Add missing return -EOPNOTSUPP; in
906 fs/ntfs/aops.c::ntfs_commit_nonresident_write().
907 - Enforce no atime and no dir atime updates at mount/remount time as
908 they are not implemented yet anyway.
909 - Move a few assignments in fs/ntfs/attrib.c::load_attribute_list() to
910 after a NULL check. Thanks to Dave Jones for pointing this out.
911
9122.1.6 - Fix minor bug in handling of compressed directories.
913
914 - Fix bug in handling of compressed directories. A compressed
915 directory is not really compressed so when we set the ->i_blocks
916 field of a compressed directory inode we were setting it from the
917 non-existing field ni->itype.compressed.size which gave random
918 results... For directories we now always use ni->allocated_size.
919
9202.1.5 - Fix minor bug in attribute list attribute handling.
921
922 - Fix bug in attribute list handling. Actually it is not as much a bug
923 as too much protection in that we were not allowing attribute lists
924 which waste space on disk while Windows XP clearly allows it and in
925 fact creates such attribute lists so our driver was failing.
926 - Update NTFS documentation ready for 2.6 kernel release.
927
9282.1.4 - Reduce compiler requirements.
929
930 - Remove all uses of unnamed structs and unions in the driver to make
931 old and newer gcc versions happy. Makes it a bit uglier IMO but at
932 least people will stop hassling me about it.
933
9342.1.3 - Important bug fixes in corner cases.
935
936 - super.c::parse_ntfs_boot_sector(): Correct the check for 64-bit
937 clusters. (Philipp Thomas)
938 - attrib.c::load_attribute_list(): Fix bug when initialized_size is a
939 multiple of the block_size but not the cluster size. (Szabolcs
940 Szakacsits)
941
9422.1.2 - Important bug fixes aleviating the hangs in statfs.
943
944 - Fix buggy free cluster and free inode determination logic.
945
9462.1.1 - Minor updates.
947
948 - Add handling for initialized_size != data_size in compressed files.
949 - Reduce function local stack usage from 0x3d4 bytes to just noise in
950 fs/ntfs/upcase.c. (Randy Dunlap)
951 - Remove compiler warnings for newer gcc.
952 - Pages are no longer kmapped by mm/filemap.c::generic_file_write()
953 around calls to ->{prepare,commit}_write. Adapt NTFS appropriately
954 in fs/ntfs/aops.c::ntfs_prepare_nonresident_write() by using
955 kmap_atomic(KM_USER0).
956
9572.1.0 - First steps towards write support: implement file overwrite.
958
959 - Add configuration option for developmental write support with an
960 appropriately scary configuration help text.
961 - Initial implementation of fs/ntfs/aops.c::ntfs_writepage() and its
962 helper fs/ntfs/aops.c::ntfs_write_block(). This enables mmap(2) based
963 overwriting of existing files on ntfs. Note: Resident files are
964 only written into memory, and not written out to disk at present, so
965 avoid writing to files smaller than about 1kiB.
966 - Initial implementation of fs/ntfs/aops.c::ntfs_prepare_write(), its
967 helper fs/ntfs/aops.c::ntfs_prepare_nonresident_write() and their
968 counterparts, fs/ntfs/aops.c::ntfs_commit_write(), and
969 fs/ntfs/aops.c::ntfs_commit_nonresident_write(), respectively. Also,
970 add generic_file_write() to the ntfs file operations (fs/ntfs/file.c).
971 This enables write(2) based overwriting of existing files on ntfs.
972 Note: As with mmap(2) based overwriting, resident files are only
973 written into memory, and not written out to disk at present, so avoid
974 writing to files smaller than about 1kiB.
975 - Implement ->truncate (fs/ntfs/inode.c::ntfs_truncate()) and
976 ->setattr() (fs/ntfs/inode.c::ntfs_setattr()) inode operations for
977 files with the purpose of intercepting and aborting all i_size
978 changes which we do not support yet. ntfs_truncate() actually only
979 emits a warning message but AFAICS our interception of i_size changes
980 elsewhere means ntfs_truncate() never gets called for i_size changes.
981 It is only called from generic_file_write() when we fail in
982 ntfs_prepare_{,nonresident_}write() in order to discard any
983 instantiated buffers beyond i_size. Thus i_size is not actually
984 changed so our warning message is enough. Unfortunately it is not
985 possible to easily determine if i_size is being changed or not hence
986 we just emit an appropriately worded error message.
987
9882.0.25 - Small bug fixes and cleanups.
989
990 - Unlock the page in an out of memory error code path in
991 fs/ntfs/aops.c::ntfs_read_block().
992 - If fs/ntfs/aops.c::ntfs_read_page() is called on an uptodate page,
993 just unlock the page and return. (This can happen due to ->writepage
994 clearing PageUptodate() during write out of MstProtected()
995 attributes.
996 - Remove leaked write code again.
997
9982.0.24 - Cleanups.
999
1000 - Treat BUG_ON() as ASSERT() not VERIFY(), i.e. do not use side effects
1001 inside BUG_ON(). (Adam J. Richter)
1002 - Split logical OR expressions inside BUG_ON() into individual BUG_ON()
1003 calls for improved debugging. (Adam J. Richter)
1004 - Add errors flag to the ntfs volume state, accessed via
1005 NVol{,Set,Clear}Errors(vol).
1006 - Do not allow read-write remounts of read-only volumes with errors.
1007 - Clarify comment for ntfs file operation sendfile which was added by
1008 Christoph Hellwig a while ago (just using generic_file_sendfile())
1009 to say that ntfs ->sendfile is only used for the case where the
1010 source data is on the ntfs partition and the destination is
1011 somewhere else, i.e. nothing we need to concern ourselves with.
1012 - Add generic_file_write() as our ntfs file write operation.
1013
10142.0.23 - Major bug fixes (races, deadlocks, non-i386 architectures).
1015
1016 - Massive internal locking changes to mft record locking. Fixes lock
1017 recursion and replaces the mrec_lock read/write semaphore with a
1018 mutex. Also removes the now superfluous mft_count. This fixes several
1019 race conditions and deadlocks, especially in the future write code.
1020 - Fix ntfs over loopback for compressed files by adding an
1021 optimization barrier. (gcc was screwing up otherwise ?)
1022 - Miscellaneous cleanups all over the code and a fix or two in error
1023 handling code paths.
1024 Thanks go to Christoph Hellwig for pointing out the following two:
1025 - Remove now unused function fs/ntfs/malloc.h::vmalloc_nofs().
1026 - Fix ntfs_free() for ia64 and parisc by checking for VMALLOC_END, too.
1027
10282.0.22 - Cleanups, mainly to ntfs_readdir(), and use C99 initializers.
1029
1030 - Change fs/ntfs/dir.c::ntfs_reddir() to only read/write ->f_pos once
1031 at entry/exit respectively.
1032 - Use C99 initializers for structures.
1033 - Remove unused variable blocks from fs/ntfs/aops.c::ntfs_read_block().
1034
10352.0.21 - Check for, and refuse to work with too large files/directories/volumes.
1036
1037 - Limit volume size at mount time to 2TiB on architectures where
1038 unsigned long is 32-bits (fs/ntfs/super.c::parse_ntfs_boot_sector()).
1039 This is the most we can do without overflowing the 32-bit limit of
1040 the block device size imposed on us by sb_bread() and sb_getblk()
1041 for the time being.
1042 - Limit file/directory size at open() time to 16TiB on architectures
1043 where unsigned long is 32-bits (fs/ntfs/file.c::ntfs_file_open() and
1044 fs/ntfs/dir.c::ntfs_dir_open()). This is the most we can do without
1045 overflowing the page cache page index.
1046
10472.0.20 - Support non-resident directory index bitmaps, fix page leak in readdir.
1048
1049 - Move the directory index bitmap to use an attribute inode instead of
1050 having special fields for it inside the ntfs inode structure. This
1051 means that the index bitmaps now use the page cache for i/o, too,
1052 and also as a side effect we get support for non-resident index
1053 bitmaps for free.
1054 - Simplify/cleanup error handling in fs/ntfs/dir.c::ntfs_readdir() and
1055 fix a page leak that manifested itself in some cases.
1056 - Add fs/ntfs/inode.c::ntfs_put_inode(), which we need to release the
1057 index bitmap inode on the final iput().
1058
10592.0.19 - Fix race condition, improvements, and optimizations in i/o interface.
1060
1061 - Apply block optimization added to fs/ntfs/aops.c::ntfs_read_block()
1062 to fs/ntfs/compress.c::ntfs_file_read_compressed_block() as well.
1063 - Drop the "file" from ntfs_file_read_compressed_block().
1064 - Rename fs/ntfs/aops.c::ntfs_enb_buffer_read_async() to
1065 ntfs_end_buffer_async_read() (more like the fs/buffer.c counterpart).
1066 - Update ntfs_end_buffer_async_read() with the improved logic from
1067 its updated counterpart fs/buffer.c::end_buffer_async_read(). Apply
1068 further logic improvements to better determine when we set PageError.
1069 - Update submission of buffers in fs/ntfs/aops.c::ntfs_read_block() to
1070 check for the buffers being uptodate first in line with the updated
1071 fs/buffer.c::block_read_full_page(). This plugs a small race
1072 condition.
1073
10742.0.18 - Fix race condition in reading of compressed files.
1075
1076 - There was a narrow window between checking a buffer head for being
1077 uptodate and locking it in ntfs_file_read_compressed_block(). We now
1078 lock the buffer and then check whether it is uptodate or not.
1079
10802.0.17 - Cleanups and optimizations - shrinking the ToDo list.
1081
1082 - Modify fs/ntfs/inode.c::ntfs_read_locked_inode() to return an error
1083 code and update callers, i.e. ntfs_iget(), to pass that error code
1084 up instead of just using -EIO.
1085 - Modifications to super.c to ensure that both mount and remount
1086 cannot set any write related options when the driver is compiled
1087 read-only.
1088 - Optimize block resolution in fs/ntfs/aops.c::ntfs_read_block() to
1089 cache the current runlist element. This should improve performance
1090 when reading very large and/or very fragmented data.
1091
10922.0.16 - Convert access to $MFT/$BITMAP to attribute inode API.
1093
1094 - Fix a stupid bug introduced in 2.0.15 where we were unmapping the
1095 wrong inode in fs/ntfs/inode.c::ntfs_attr_iget().
1096 - Fix debugging check in fs/ntfs/aops.c::ntfs_read_block().
1097 - Convert $MFT/$BITMAP access to attribute inode API and remove all
1098 remnants of the ugly mftbmp address space and operations hack. This
1099 means we finally have only one readpage function as well as only one
1100 async io completion handler. Yey! The mft bitmap is now just an
1101 attribute inode and is accessed from vol->mftbmp_ino just as if it
1102 were a normal file. Fake inodes rule. (-:
1103
11042.0.15 - Fake inodes based attribute i/o via the pagecache, fixes and cleanups.
1105
1106 - Fix silly bug in fs/ntfs/super.c::parse_options() which was causing
1107 remounts to fail when the partition had an entry in /etc/fstab and
1108 the entry specified the nls= option.
1109 - Apply same macro magic used in fs/ntfs/inode.h to fs/ntfs/volume.h to
1110 expand all the helper functions NVolFoo(), NVolSetFoo(), and
1111 NVolClearFoo().
1112 - Move copyright statement from driver initialisation message to
1113 module description (fs/super.c). This makes the initialisation
1114 message fit on one line and fits in better with rest of kernel.
1115 - Update fs/ntfs/attrib.c::map_run_list() to work on both real and
1116 attribute inodes, and both for files and directories.
1117 - Implement fake attribute inodes allowing all attribute i/o to go via
1118 the page cache and to use all the normal vfs/mm functionality:
1119 - Add ntfs_attr_iget() and its helper ntfs_read_locked_attr_inode()
1120 to fs/ntfs/inode.c.
1121 - Add needed cleanup code to ntfs_clear_big_inode().
1122 - Merge address space operations for files and directories (aops.c),
1123 now just have ntfs_aops:
1124 - Rename:
1125 end_buffer_read_attr_async() -> ntfs_end_buffer_read_async(),
1126 ntfs_attr_read_block() -> ntfs_read_block(),
1127 ntfs_file_read_page() -> ntfs_readpage().
1128 - Rewrite fs/ntfs/aops.c::ntfs_readpage() to work on both real and
1129 attribute inodes, and both for files and directories.
1130 - Remove obsolete fs/ntfs/aops.c::ntfs_mst_readpage().
1131
11322.0.14 - Run list merging code cleanup, minor locking changes, typo fixes.
1133
1134 - Change fs/ntfs/super.c::ntfs_statfs() to not rely on BKL by moving
1135 the locking out of super.c::get_nr_free_mft_records() and taking and
1136 dropping the mftbmp_lock rw_semaphore in ntfs_statfs() itself.
1137 - Bring attribute runlist merging code (fs/ntfs/attrib.c) in sync with
1138 current userspace ntfs library code. This means that if a merge
1139 fails the original runlists are always left unmodified instead of
1140 being silently corrupted.
1141 - Misc typo fixes.
1142
11432.0.13 - Use iget5_locked() in preparation for fake inodes and small cleanups.
1144
1145 - Remove nr_mft_bits and the now superfluous union with nr_mft_records
1146 from ntfs_volume structure.
1147 - Remove nr_lcn_bits and the now superfluous union with nr_clusters
1148 from ntfs_volume structure.
1149 - Use iget5_locked() and friends instead of conventional iget(). Wrap
1150 the call in fs/ntfs/inode.c::ntfs_iget() and update callers of iget()
1151 to use ntfs_iget(). Leave only one iget() call at mount time so we
1152 don't need an ntfs_iget_mount().
1153 - Change fs/ntfs/inode.c::ntfs_new_extent_inode() to take mft_no as an
1154 additional argument.
1155
11562.0.12 - Initial cleanup of address space operations following 2.0.11 changes.
1157
1158 - Merge fs/ntfs/aops.c::end_buffer_read_mst_async() and
1159 fs/ntfs/aops.c::end_buffer_read_file_async() into one function
1160 fs/ntfs/aops.c::end_buffer_read_attr_async() using NInoMstProtected()
1161 to determine whether to apply mst fixups or not.
1162 - Above change allows merging fs/ntfs/aops.c::ntfs_file_read_block()
1163 and fs/ntfs/aops.c::ntfs_mst_readpage() into one function
1164 fs/ntfs/aops.c::ntfs_attr_read_block(). Also, create a tiny wrapper
1165 fs/ntfs/aops.c::ntfs_mst_readpage() to transform the parameters from
1166 the VFS readpage function prototype to the ntfs_attr_read_block()
1167 function prototype.
1168
11692.0.11 - Initial preparations for fake inode based attribute i/o.
1170
1171 - Move definition of ntfs_inode_state_bits to fs/ntfs/inode.h and
1172 do some macro magic (adapted from include/linux/buffer_head.h) to
1173 expand all the helper functions NInoFoo(), NInoSetFoo(), and
1174 NInoClearFoo().
1175 - Add new flag to ntfs_inode_state_bits: NI_Sparse.
1176 - Add new fields to ntfs_inode structure to allow use of fake inodes
1177 for attribute i/o: type, name, name_len. Also add new state bits:
1178 NI_Attr, which, if set, indicates the inode is a fake inode, and
1179 NI_MstProtected, which, if set, indicates the attribute uses multi
1180 sector transfer protection, i.e. fixups need to be applied after
1181 reads and before/after writes.
1182 - Rename fs/ntfs/inode.c::ntfs_{new,clear,destroy}_inode() to
1183 ntfs_{new,clear,destroy}_extent_inode() and update callers.
1184 - Use ntfs_clear_extent_inode() in fs/ntfs/inode.c::__ntfs_clear_inode()
1185 instead of ntfs_destroy_extent_inode().
1186 - Cleanup memory deallocations in {__,}ntfs_clear_{,big_}inode().
1187 - Make all operations on ntfs inode state bits use the NIno* functions.
1188 - Set up the new ntfs inode fields and state bits in
1189 fs/ntfs/inode.c::ntfs_read_inode() and add appropriate cleanup of
1190 allocated memory to __ntfs_clear_inode().
1191 - Cleanup ntfs_inode structure a bit for better ordering of elements
1192 w.r.t. their size to allow better packing of the structure in memory.
1193
11942.0.10 - There can only be 2^32 - 1 inodes on an NTFS volume.
1195
1196 - Add check at mount time to verify that the number of inodes on the
1197 volume does not exceed 2^32 - 1, which is the maximum allowed for
1198 NTFS according to Microsoft.
1199 - Change mft_no member of ntfs_inode structure to be unsigned long.
1200 Update all users. This makes ntfs_inode->mft_no just a copy of struct
1201 inode->i_ino. But we can't just always use struct inode->i_ino and
1202 remove mft_no because extent inodes do not have an attached struct
1203 inode.
1204
12052.0.9 - Decompression engine now uses a single buffer and other cleanups.
1206
1207 - Change decompression engine to use a single buffer protected by a
1208 spin lock instead of per-CPU buffers. (Rusty Russell)
1209 - Do not update cb_pos when handling a partial final page during
1210 decompression of a sparse compression block, as the value is later
1211 reset without being read/used. (Rusty Russell)
1212 - Switch to using the new KM_BIO_SRC_IRQ for atomic kmap()s. (Andrew
1213 Morton)
1214 - Change buffer size in ntfs_readdir()/ntfs_filldir() to use
1215 NLS_MAX_CHARSET_SIZE which makes the buffers almost 1kiB each but
1216 it also makes everything safer so it is a good thing.
1217 - Miscellaneous minor cleanups to comments.
1218
12192.0.8 - Major updates for handling of case sensitivity and dcache aliasing.
1220
1221 Big thanks go to Al Viro and other inhabitants of #kernel for investing
1222 their time to discuss the case sensitivity and dcache aliasing issues.
1223
1224 - Remove unused source file fs/ntfs/attraops.c.
1225 - Remove show_inodes mount option(s), thus dropping support for
1226 displaying of short file names.
1227 - Remove deprecated mount option posix.
1228 - Restore show_sys_files mount option.
1229 - Add new mount option case_sensitive, to determine if the driver
1230 treats file names as case sensitive or not. If case sensitive, create
1231 file names in the POSIX namespace. Otherwise create file names in the
1232 LONG/WIN32 namespace. Note, files remain accessible via their short
1233 file name, if it exists.
1234 - Remove really dumb logic bug in boot sector recovery code.
1235 - Fix dcache aliasing issues wrt short/long file names via changes
1236 to fs/ntfs/dir.c::ntfs_lookup_inode_by_name() and
1237 fs/ntfs/namei.c::ntfs_lookup():
1238 - Add additional argument to ntfs_lookup_inode_by_name() in which we
1239 return information about the matching file name if the case is not
1240 matching or the match is a short file name. See comments above the
1241 function definition for details.
1242 - Change ntfs_lookup() to only create dcache entries for the correctly
1243 cased file name and only for the WIN32 namespace counterpart of DOS
1244 namespace file names. This ensures we have only one dentry per
1245 directory and also removes all dcache aliasing issues between short
1246 and long file names once we add write support. See comments above
1247 function for details.
1248 - Fix potential 1 byte overflow in fs/ntfs/unistr.c::ntfs_ucstonls().
1249
12502.0.7 - Minor cleanups and updates for changes in core kernel code.
1251
1252 - Remove much of the NULL struct element initializers.
1253 - Various updates to make compatible with recent kernels.
1254 - Remove defines of MAX_BUF_PER_PAGE and include linux/buffer_head.h
1255 in fs/ntfs/ntfs.h instead.
1256 - Remove no longer needed KERNEL_VERSION checks. We are now in the
1257 kernel proper so they are no longer needed.
1258
12592.0.6 - Major bugfix to make compatible with other kernel changes.
1260
1261 - Initialize the mftbmp address space properly now that there are more
1262 fields in the struct address_space. This was leading to hangs and
1263 oopses on umount since 2.5.12 because of changes to other parts of
1264 the kernel. We probably want a kernel generic init_address_space()
1265 function...
1266 - Drop BKL from ntfs_readdir() after consultation with Al Viro. The
1267 only caller of ->readdir() is vfs_readdir() which holds i_mutex
1268 during the call, and i_mutex is sufficient protection against changes
1269 in the directory inode (including ->i_size).
1270 - Use generic_file_llseek() for directories (as opposed to
1271 default_llseek()) as this downs i_mutex instead of the BKL which is
1272 what we now need for exclusion against ->f_pos changes considering we
1273 no longer take the BKL in ntfs_readdir().
1274
12752.0.5 - Major bugfix. Buffer overflow in extent inode handling.
1276
1277 - No need to set old blocksize in super.c::ntfs_fill_super() as the
1278 VFS does so via invocation of deactivate_super() calling
1279 fs->fill_super() calling block_kill_super() which does it.
1280 - BKL moved from VFS into dir.c::ntfs_readdir(). (Linus Torvalds)
1281 -> Do we really need it? I don't think so as we have exclusion on
1282 the directory ntfs_inode rw_semaphore mrec_lock. We mmight have to
1283 move the ->f_pos accesses under the mrec_lock though. Check this...
1284 - Fix really, really, really stupid buffer overflow in extent inode
1285 handling in mft.c::map_extent_mft_record().
1286
12872.0.4 - Cleanups and updates for kernel 2.5.11.
1288
1289 - Add documentation on how to use the MD driver to be able to use NTFS
1290 stripe and volume sets in Linux and generally cleanup documentation
1291 a bit.
1292 Remove all uses of kdev_t in favour of struct block_device *:
1293 - Change compress.c::ntfs_file_read_compressed_block() to use
1294 sb_getblk() instead of getblk().
1295 - Change super.c::ntfs_fill_super() to use bdev_hardsect_size() instead
1296 of get_hardsect_size().
1297 - No need to get old blocksize in super.c::ntfs_fill_super() as
1298 fs/super.c::get_sb_bdev() already does this.
1299 - Set bh->b_bdev instead of bh->b_dev throughout aops.c.
1300
13012.0.3 - Small bug fixes, cleanups, and performance improvements.
1302
1303 - Remove some dead code from mft.c.
1304 - Optimize readpage and read_block functions throughout aops.c so that
1305 only initialized blocks are read. Non-initialized ones have their
1306 buffer head mapped, zeroed, and set up to date, without scheduling
1307 any i/o. Thanks to Al Viro for advice on how to avoid the device i/o.
1308 Thanks go to Andrew Morton for spotting the below:
1309 - Fix buglet in allocate_compression_buffers() error code path.
1310 - Call flush_dcache_page() after modifying page cache page contents in
1311 ntfs_file_readpage().
1312 - Check for existence of page buffers throughout aops.c before calling
1313 create_empty_buffers(). This happens when an I/O error occurs and the
1314 read is retried. (It also happens once writing is implemented so that
1315 needed doing anyway but I had left it for later...)
1316 - Don't BUG_ON() uptodate and/or mapped buffers throughout aops.c in
1317 readpage and read_block functions. Reasoning same as above (i.e. I/O
1318 error retries and future write code paths.)
1319
13202.0.2 - Minor updates and cleanups.
1321
1322 - Cleanup: rename mst.c::__post_read_mst_fixup to post_write_mst_fixup
1323 and cleanup the code a bit, removing the unused size parameter.
1324 - Change default fmask to 0177 and update documentation.
1325 - Change attrib.c::get_attr_search_ctx() to return the search context
1326 directly instead of taking the address of a pointer. A return value
1327 of NULL means the allocation failed. Updated all callers
1328 appropriately.
1329 - Update to 2.5.9 kernel (preserving backwards compatibility) by
1330 replacing all occurences of page->buffers with page_buffers(page).
1331 - Fix minor bugs in runlist merging, also minor cleanup.
1332 - Updates to bootsector layout and mft mirror contents descriptions.
1333 - Small bug fix in error detection in unistr.c and some cleanups.
1334 - Grow name buffer allocations in unistr.c in aligned mutlipled of 64
1335 bytes.
1336
13372.0.1 - Minor updates.
1338
1339 - Make default umask correspond to documentation.
1340 - Improve documentation.
1341 - Set default mode to include execute bit. The {u,f,d}mask can be used
1342 to take it away if desired. This allows binaries to be executed from
1343 a mounted ntfs partition.
1344
13452.0.0 - New version number. Remove TNG from the name. Now in the kernel.
1346
1347 - Add kill_super, just keeping up with the vfs changes in the kernel.
1348 - Repeat some changes from tng-0.0.8 that somehow got lost on the way
1349 from the CVS import into BitKeeper.
1350 - Begin to implement proper handling of allocated_size vs
1351 initialized_size vs data_size (i.e. i_size). Done are
1352 mft.c::ntfs_mft_readpage(), aops.c::end_buffer_read_index_async(),
1353 and attrib.c::load_attribute_list().
1354 - Lock the runlist in attrib.c::load_attribute_list() while using it.
1355 - Fix memory leak in ntfs_file_read_compressed_block() and generally
1356 clean up compress.c a little, removing some uncommented/unused debug
1357 code.
1358 - Tidy up dir.c a little bit.
1359 - Don't bother getting the runlist in inode.c::ntfs_read_inode().
1360 - Merge mft.c::ntfs_mft_readpage() and aops.c::ntfs_index_readpage()
1361 creating aops.c::ntfs_mst_readpage(), improving the handling of
1362 holes and overflow in the process and implementing the correct
1363 equivalent of ntfs_file_get_block() in ntfs_mst_readpage() itself.
1364 I am aiming for correctness at the moment. Modularisation can come
1365 later.
1366 - Rename aops.c::end_buffer_read_index_async() to
1367 end_buffer_read_mst_async() and optimize the overflow checking and
1368 handling.
1369 - Use the host of the mftbmp address space mapping to hold the ntfs
1370 volume. This is needed so the async i/o completion handler can
1371 retrieve a pointer to the volume. Hopefully this will not cause
1372 problems elsewhere in the kernel... Otherwise will need to use a
1373 fake inode.
1374 - Complete implementation of proper handling of allocated_size vs
1375 initialized_size vs data_size (i.e. i_size) in whole driver.
1376 Basically aops.c is now completely rewritten.
1377 - Change NTFS driver name to just NTFS and set version number to 2.0.0
1378 to make a clear distinction from the old driver which is still on
1379 version 1.1.22.
1380
1381tng-0.0.8 - 08/03/2002 - Now using BitKeeper, http://linux-ntfs.bkbits.net/
1382
1383 - Replace bdevname(sb->s_dev) with sb->s_id.
1384 - Remove now superfluous new-line characters in all callers of
1385 ntfs_debug().
1386 - Apply kludge in ntfs_read_inode(), setting i_nlink to 1 for
1387 directories. Without this the "find" utility gets very upset which is
1388 fair enough as Linux/Unix do not support directory hard links.
1389 - Further runlist merging work. (Richard Russon)
1390 - Backwards compatibility for gcc-2.95. (Richard Russon)
1391 - Update to kernel 2.5.5-pre1 and rediff the now tiny patch.
1392 - Convert to new filesystem declaration using ->ntfs_get_sb() and
1393 replacing ntfs_read_super() with ntfs_fill_super().
1394 - Set s_maxbytes to MAX_LFS_FILESIZE to avoid page cache page index
1395 overflow on 32-bit architectures.
1396 - Cleanup upcase loading code to use ntfs_(un)map_page().
1397 - Disable/reenable preemtion in critical sections of compession engine.
1398 - Replace device size determination in ntfs_fill_super() with
1399 sb->s_bdev->bd_inode->i_size (in bytes) and remove now superfluous
1400 function super.c::get_nr_blocks().
1401 - Implement a mount time option (show_inodes) allowing choice of which
1402 types of inode names readdir() returns and modify ntfs_filldir()
1403 accordingly. There are several parameters to show_inodes:
1404 system: system files
1405 win32: long file names (including POSIX file names) [DEFAULT]
1406 long: same as win32
1407 dos: short file names only (excluding POSIX file names)
1408 short: same as dos
1409 posix: same as both win32 and dos
1410 all: all file names
1411 Note that the options are additive, i.e. specifying:
1412 -o show_inodes=system,show_inodes=win32,show_inodes=dos
1413 is the same as specifying:
1414 -o show_inodes=all
1415 Note that the "posix" and "all" options will show all directory
1416 names, BUT the link count on each directory inode entry is set to 1,
1417 due to Linux not supporting directory hard links. This may well
1418 confuse some userspace applications, since the directory names will
1419 have the same inode numbers. Thus it is NOT advisable to use the
1420 "posix" or "all" options. We provide them only for completeness sake.
1421 - Add copies of allocated_size, initialized_size, and compressed_size to
1422 the ntfs inode structure and set them up in
1423 inode.c::ntfs_read_inode(). These reflect the unnamed data attribute
1424 for files and the index allocation attribute for directories.
1425 - Add copies of allocated_size and initialized_size to ntfs inode for
1426 $BITMAP attribute of large directories and set them up in
1427 inode.c::ntfs_read_inode().
1428 - Add copies of allocated_size and initialized_size to ntfs volume for
1429 $BITMAP attribute of $MFT and set them up in
1430 super.c::load_system_files().
1431 - Parse deprecated ntfs driver options (iocharset, show_sys_files,
1432 posix, and utf8) and tell user what the new options to use are. Note
1433 we still do support them but they will be removed with kernel 2.7.x.
1434 - Change all occurences of integer long long printf formatting to hex
1435 as printk() will not support long long integer format if/when the
1436 div64 patch goes into the kernel.
1437 - Make slab caches have stable names and change the names to what they
1438 were intended to be. These changes are required/made possible by the
1439 new slab cache name handling which removes the length limitation by
1440 requiring the caller of kmem_cache_create() to supply a stable name
1441 which is then referenced but not copied.
1442 - Rename run_list structure to run_list_element and create a new
1443 run_list structure containing a pointer to a run_list_element
1444 structure and a read/write semaphore. Adapt all users of runlists
1445 to new scheme and take and release the lock as needed. This fixes a
1446 nasty race as the run_list changes even when inodes are locked for
1447 reading and even when the inode isn't locked at all, so we really
1448 needed the serialization. We use a semaphore rather than a spinlock
1449 as memory allocations can sleep and doing everything GFP_ATOMIC
1450 would be silly.
1451 - Cleanup read_inode() removing all code checking for lowest_vcn != 0.
1452 This can never happen due to the nature of lookup_attr() and how we
1453 support attribute lists. If it did happen it would imply the inode
1454 being corrupt.
1455 - Check for lowest_vcn != 0 in ntfs_read_inode() and mark the inode as
1456 bad if found.
1457 - Update to 2.5.6-pre2 changes in struct address_space.
1458 - Use parent_ino() when accessing d_parent inode number in dir.c.
1459 - Import Sourceforge CVS repository into BitKeeper repository:
1460 http://linux-ntfs.bkbits.net/ntfs-tng-2.5
1461 - Update fs/Makefile, fs/Config.help, fs/Config.in, and
1462 Documentation/filesystems/ntfs.txt for NTFS TNG.
1463 - Create kernel configuration option controlling whether debugging
1464 is enabled or not.
1465 - Add the required export of end_buffer_io_sync() from the patches
1466 directory to the kernel code.
1467 - Update inode.c::ntfs_show_options() with show_inodes mount option.
1468 - Update errors mount option.
1469
1470tng-0.0.7 - 13/02/2002 - The driver is now feature complete for read-only!
1471
1472 - Cleanup mft.c and it's debug/error output in particular. Fix a minor
1473 bug in mapping of extent inodes. Update all the comments to fit all
1474 the recent code changes.
1475 - Modify vcn_to_lcn() to cope with entirely unmapped runlists.
1476 - Cleanups in compress.c, mostly comments and folding help.
1477 - Implement attrib.c::map_run_list() as a generic helper.
1478 - Make compress.c::ntfs_file_read_compressed_block() use map_run_list()
1479 thus making code shorter and enabling attribute list support.
1480 - Cleanup incorrect use of [su]64 with %L printf format specifier in
1481 all source files. Type casts to [unsigned] long long added to correct
1482 the mismatches (important for architectures which have long long not
1483 being 64 bits).
1484 - Merge async io completion handlers for directory indexes and $MFT
1485 data into one by setting the index_block_size{_bits} of the ntfs
1486 inode for $MFT to the mft_record_size{_bits} of the ntfs_volume.
1487 - Cleanup aops.c, update comments.
1488 - Make ntfs_file_get_block() use map_run_list() so all files now
1489 support attribute lists.
1490 - Make ntfs_dir_readpage() almost verbatim copy of
1491 block_read_full_page() by using ntfs_file_get_block() with only real
1492 difference being the use of our own async io completion handler
1493 rather than the default one, thus reducing the amount of code and
1494 automatically enabling attribute list support for directory indices.
1495 - Fix bug in load_attribute_list() - forgot to call brelse in error
1496 code path.
1497 - Change parameters to find_attr() and lookup_attr(). We no longer
1498 pass in the upcase table and its length. These can be gotten from
1499 ctx->ntfs_ino->vol->upcase{_len}. Update all callers.
1500 - Cleanups in attrib.c.
1501 - Implement merging of runlists, attrib.c::merge_run_lists() and its
1502 helpers. (Richard Russon)
1503 - Attribute lists part 2, attribute extents and multi part runlists:
1504 enable proper support for LCN_RL_NOT_MAPPED and automatic mapping of
1505 further runlist parts via attrib.c::map_run_list().
1506 - Tiny endianness bug fix in decompress_mapping_pairs().
1507
1508tng-0.0.6 - Encrypted directories, bug fixes, cleanups, debugging enhancements.
1509
1510 - Enable encrypted directories. (Their index root is marked encrypted
1511 to indicate that new files in that directory should be created
1512 encrypted.)
1513 - Fix bug in NInoBmpNonResident() macro. (Cut and paste error.)
1514 - Enable $Extend system directory. Most (if not all) extended system
1515 files do not have unnamed data attributes so ntfs_read_inode() had to
1516 special case them but that is ok, as the special casing recovery
1517 happens inside an error code path so there is zero slow down in the
1518 normal fast path. The special casing is done by introducing a new
1519 function inode.c::ntfs_is_extended_system_file() which checks if any
1520 of the hard links in the inode point to $Extend as being their parent
1521 directory and if they do we assume this is an extended system file.
1522 - Create a sysctl/proc interface to allow {dis,en}abling of debug output
1523 when compiled with -DDEBUG. Default is debug messages to be disabled.
1524 To enable them, one writes a non-zero value to /proc/sys/fs/ntfs-debug
1525 (if /proc is enabled) or uses sysctl(2) to effect the same (if sysctl
1526 interface is enabled). Inspired by old ntfs driver.
1527 - Add debug_msgs insmod/kernel boot parameter to set whether debug
1528 messages are {dis,en}abled. This is useful to enable debug messages
1529 during ntfs initialization and is the only way to activate debugging
1530 when the sysctl interface is not enabled.
1531 - Cleanup debug output in various places.
1532 - Remove all dollar signs ($) from the source (except comments) to
1533 enable compilation on architectures whose gcc compiler does not
1534 support dollar signs in the names of variables/constants. Attribute
1535 types now start with AT_ instead of $ and $I30 is now just I30.
1536 - Cleanup ntfs_lookup() and add consistency check of sequence numbers.
1537 - Load complete runlist for $MFT/$BITMAP during mount and cleanup
1538 access functions. This means we now cope with $MFT/$BITMAP being
1539 spread accross several mft records.
1540 - Disable modification of mft_zone_multiplier on remount. We can always
1541 reenable this later on if we really want to, but we will need to make
1542 sure we readjust the mft_zone size / layout accordingly.
1543
1544tng-0.0.5 - Modernize for 2.5.x and further in line-ing with Al Viro's comments.
1545
1546 - Use sb_set_blocksize() instead of set_blocksize() and verify the
1547 return value.
1548 - Use sb_bread() instead of bread() throughout.
1549 - Add index_vcn_size{_bits} to ntfs_inode structure to store the size
1550 of a directory index block vcn. Apply resulting simplifications in
1551 dir.c everywhere.
1552 - Fix a small bug somewhere (but forgot what it was).
1553 - Change ntfs_{debug,error,warning} to enable gcc to do type checking
1554 on the printf-format parameter list and fix bugs reported by gcc
1555 as a result. (Richard Russon)
1556 - Move inode allocation strategy to Al's new stuff but maintain the
1557 divorce of ntfs_inode from struct inode. To achieve this we have two
1558 separate slab caches, one for big ntfs inodes containing a struct
1559 inode and pure ntfs inodes and at the same time fix some faulty
1560 error code paths in ntfs_read_inode().
1561 - Show mount options in proc (inode.c::ntfs_show_options()).
1562
1563tng-0.0.4 - Big changes, getting in line with Al Viro's comments.
1564
1565 - Modified (un)map_mft_record functions to be common for read and write
1566 case. To specify which is which, added extra parameter at front of
1567 parameter list. Pass either READ or WRITE to this, each has the
1568 obvious meaning.
1569 - General cleanups to allow for easier folding in vi.
1570 - attrib.c::decompress_mapping_pairs() now accepts the old runlist
1571 argument, and invokes attrib.c::merge_run_lists() to merge the old
1572 and the new runlists.
1573 - Removed attrib.c::find_first_attr().
1574 - Implemented loading of attribute list and complete runlist for $MFT.
1575 This means we now cope with $MFT being spread across several mft
1576 records.
1577 - Adapt to 2.5.2-pre9 and the changed create_empty_buffers() syntax.
1578 - Adapt major/minor/kdev_t/[bk]devname stuff to new 2.5.x kernels.
1579 - Make ntfs_volume be allocated via kmalloc() instead of using a slab
1580 cache. There are too little ntfs_volume structures at any one time
1581 to justify a private slab cache.
1582 - Fix bogus kmap() use in async io completion. Now use kmap_atomic().
1583 Use KM_BIO_IRQ on advice from IRC/kernel...
1584 - Use ntfs_map_page() in map_mft_record() and create ->readpage method
1585 for reading $MFT (ntfs_mft_readpage). In the process create dedicated
1586 address space operations (ntfs_mft_aops) for $MFT inode mapping. Also
1587 removed the now superfluous exports from the kernel core patch.
1588 - Fix a bug where kfree() was used instead of ntfs_free().
1589 - Change map_mft_record() to take ntfs_inode as argument instead of
1590 vfs inode. Dito for unmap_mft_record(). Adapt all callers.
1591 - Add pointer to ntfs_volume to ntfs_inode.
1592 - Add mft record number and sequence number to ntfs_inode. Stop using
1593 i_ino and i_generation for in-driver purposes.
1594 - Implement attrib.c::merge_run_lists(). (Richard Russon)
1595 - Remove use of proper inodes by extent inodes. Move i_ino and
1596 i_generation to ntfs_inode to do this. Apply simplifications that
1597 result and remove iget_no_wait(), etc.
1598 - Pass ntfs_inode everywhere in the driver (used to be struct inode).
1599 - Add reference counting in ntfs_inode for the ntfs inode itself and
1600 for the mapped mft record.
1601 - Extend mft record mapping so we can (un)map extent mft records (new
1602 functions (un)map_extent_mft_record), and so mappings are reference
1603 counted and don't have to happen twice if already mapped - just ref
1604 count increases.
1605 - Add -o iocharset as alias to -o nls for backwards compatibility.
1606 - The latest core patch is now tiny. In fact just a single additional
1607 export is necessary over the base kernel.
1608
1609tng-0.0.3 - Cleanups, enhancements, bug fixes.
1610
1611 - Work on attrib.c::decompress_mapping_pairs() to detect base extents
1612 and setup the runlist appropriately using knowledge provided by the
1613 sizes in the base attribute record.
1614 - Balance the get_/put_attr_search_ctx() calls so we don't leak memory
1615 any more.
1616 - Introduce ntfs_malloc_nofs() and ntfs_free() to allocate/free a single
1617 page or use vmalloc depending on the amount of memory requested.
1618 - Cleanup error output. The __FUNCTION__ "(): " is now added
1619 automatically. Introduced a new header file debug.h to support this
1620 and also moved ntfs_debug() function into it.
1621 - Make reading of compressed files more intelligent and especially get
1622 rid of the vmalloc_nofs() from readpage(). This now uses per CPU
1623 buffers (allocated at first mount with cluster size <= 4kiB and
1624 deallocated on last umount with cluster size <= 4kiB), and
1625 asynchronous io for the compressed data using a list of buffer heads.
1626 Er, we use synchronous io as async io only works on whole pages
1627 covered by buffers and not on individual buffer heads...
1628 - Bug fix for reading compressed files with sparse compression blocks.
1629
1630tng-0.0.2 - Now handles larger/fragmented/compressed volumes/files/dirs.
1631
1632 - Fixed handling of directories when cluster size exceeds index block
1633 size.
1634 - Hide DOS only name space directory entries from readdir() but allow
1635 them in lookup(). This should fix the problem that Linux doesn't
1636 support directory hard links, while still allowing access to entries
1637 via their short file name. This also has the benefit of mimicking
1638 what Windows users are used to, so it is the ideal solution.
1639 - Implemented sync_page everywhere so no more hangs in D state when
1640 waiting for a page.
1641 - Stop using bforget() in favour of brelse().
1642 - Stop locking buffers unnecessarily.
1643 - Implemented compressed files (inode->mapping contains uncompressed
1644 data, raw compressed data is currently bread() into a vmalloc()ed
1645 memory buffer).
1646 - Enable compressed directories. (Their index root is marked compressed
1647 to indicate that new files in that directory should be created
1648 compressed.)
1649 - Use vsnprintf rather than vsprintf in the ntfs_error and ntfs_warning
1650 functions. (Thanks to Will Dyson for pointing this out.)
1651 - Moved the ntfs_inode and ntfs_volume (the former ntfs_inode_info and
1652 ntfs_sb_info) out of the common inode and super_block structures and
1653 started using the generic_ip and generic_sbp pointers instead. This
1654 makes ntfs entirely private with respect to the kernel tree.
1655 - Detect compiler version and abort with error message if gcc less than
1656 2.96 is used.
1657 - Fix bug in name comparison function in unistr.c.
1658 - Implement attribute lists part 1, the infrastructure: search contexts
1659 and operations, find_external_attr(), lookup_attr()) and make the
1660 code use the infrastructure.
1661 - Fix stupid buffer overflow bug that became apparent on larger run
1662 list containing attributes.
1663 - Fix bugs in readdir() that became apparent on larger directories.
1664
1665 The driver is now really useful and survives the test
1666 find . -type f -exec md5sum "{}" \;
1667 without any error messages on a over 1GiB sized partition with >16k
1668 files on it, including compressed files and directories and many files
1669 and directories with attribute lists.
1670
1671tng-0.0.1 - The first useful version.
1672
1673 - Added ntfs_lookup().
1674 - Added default upcase generation and handling.
1675 - Added compile options to be shown on module init.
1676 - Many bug fixes that were "hidden" before.
1677 - Update to latest kernel.
1678 - Added ntfs_readdir().
1679 - Added file operations for mmap(), read(), open() and llseek(). We just
1680 use the generic ones. The whole point of going through implementing
1681 readpage() methods and where possible get_block() call backs is that
1682 this allows us to make use of the generic high level methods provided
1683 by the kernel.
1684
1685 The driver is now actually useful! Yey. (-: It undoubtedly has got bugs
1686 though and it doesn't implement accesssing compressed files yet. Also,
1687 accessing files with attribute list attributes is not implemented yet
1688 either. But for small or simple filesystems it should work and allow
1689 you to list directories, use stat on directory entries and the file
1690 system, open, read, mmap and llseek around in files. A big mile stone
1691 has been reached!
1692
1693tng-0.0.0 - Initial version tag.
1694
1695 Initial driver implementation. The driver can mount and umount simple
1696 NTFS filesystems (i.e. ones without attribute lists in the system
1697 files). If the mount fails there might be problems in the error handling
1698 code paths, so be warned. Otherwise it seems to be loading the system
1699 files nicely and the mft record read mapping/unmapping seems to be
1700 working nicely, too. Proof of inode metadata in the page cache and non-
1701 resident file unnamed stream data in the page cache concepts is thus
1702 complete.
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-31 22:31:56 -0400