Remove fs/ntfs/ChangeLog

Remove fs/ntfs/ChangeLog. No need for such files since we have git. Acked-by: Anton Altaparmakov <aia21@cam.ac.uk> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
author: Jiri Kosina <jkosina@suse.cz> 2010-02-24 07:55:31 -0500
committer: Jiri Kosina <jkosina@suse.cz> 2010-02-24 07:55:31 -0500
commit: 7c821a179f91c3ad52588400ce52a7fb48b9868c (patch)
tree: 87a133a7e8aaa756253f82975b265a26fbffc328 /fs/ntfs
parent: a8ab0102d7f031e477dbe31450d5b69d40bea324 (diff)
1 files changed, 0 insertions, 1702 deletions
diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
deleted file mode 100644
index 37c11e194372..000000000000
--- a/fs/ntfs/ChangeLog
+++ /dev/null
@@ -1,1702 +0,0 @@
-ToDo/Notes:
-        - Find and fix bugs.
-        - The only places in the kernel where a file is resized are
-          ntfs_file_write*() and ntfs_truncate() for both of which i_mutex is
-          held.  Just have to be careful in read-/writepage and other helpers
-          not running under i_mutex that we play nice.  Also need to be careful
-          with initialized_size extension in ntfs_file_write*() and writepage.
-          UPDATE: The only things that need to be checked are the compressed
-          write and the other attribute resize/write cases like index
-          attributes, etc.  For now none of these are implemented so are safe.
-        - Implement filling in of holes in aops.c::ntfs_writepage() and its
-          helpers.
-        - Implement mft.c::sync_mft_mirror_umount().  We currently will just
-          leave the volume dirty on umount if the final iput(vol->mft_ino)
-          causes a write of any mirrored mft records due to the mft mirror
-          inode having been discarded already.  Whether this can actually ever
-          happen is unclear however so it is worth waiting until someone hits
-          the problem.
-2.1.29 - Fix a deadlock at mount time.
-        - During mount the VFS holds s_umount lock on the superblock.  So when
-          we try to empty the journal $LogFile contents by calling
-          ntfs_attr_set() when the machine does not have much memory and the
-          journal is large ntfs_attr_set() results in the VM trying to balance
-          dirty pages which in turn tries to that the s_umount lock and thus we
-          get a deadlock.  The solution is to not use ntfs_attr_set() and
-          instead do the zeroing by hand at the block level rather than page
-          cache level.
-        - Fix sparse warnings.
-2.1.28 - Fix a deadlock.
-        - Fix deadlock in fs/ntfs/inode.c::ntfs_put_inode().  Thanks to Sergey
-          Vlasov for the report and detailed analysis of the deadlock.  The fix
-          involved getting rid of ntfs_put_inode() altogether and hence NTFS no
-          longer has a ->put_inode super operation.
-2.1.27 - Various bug fixes and cleanups.
-        - Fix two compiler warnings on Alpha.  Thanks to Andrew Morton for
-          reporting them.
-        - Fix an (innocent) off-by-one error in the runlist code.
-        - Fix a buggette in an "should be impossible" case handling where we
-          continued the attribute lookup loop instead of aborting it.
-        - Use buffer_migrate_page() for the ->migratepage function of all ntfs
-          address space operations.
-        - Fix comparison of $MFT and $MFTMirr to not bail out when there are
-          unused, invalid mft records which are the same in both $MFT and
-          $MFTMirr.
-        - Add support for sparse files which have a compression unit of 0.
-        - Remove all the make_bad_inode() calls.  This should only be called
-          from read inode and new inode code paths.
-        - Limit name length in fs/ntfs/unistr.c::ntfs_nlstoucs() to maximum
-          allowed by NTFS, i.e. 255 Unicode characters, not including the
-          terminating NULL (which is not stored on disk).
-        - Improve comments on file attribute flags in fs/ntfs/layout.h.
-        - Fix a bug in fs/ntfs/inode.c::ntfs_read_locked_index_inode() where we
-          forgot to update a temporary variable so loading index inodes which
-          have an index allocation attribute failed.
-        - Add a missing call to flush_dcache_mft_record_page() in
-          fs/ntfs/inode.c::ntfs_write_inode().
-        - Handle the recently introduced -ENAMETOOLONG return value from
-          fs/ntfs/unistr.c::ntfs_nlstoucs() in fs/ntfs/namei.c::ntfs_lookup().
-        - Semaphore to mutex conversion.  (Ingo Molnar)
-2.1.26 - Minor bug fixes and updates.
-        - Fix a potential overflow in file.c where a cast to s64 was missing in
-          a left shift of a page index.
-        - The struct inode has had its i_sem semaphore changed to a mutex named
-          i_mutex.
-        - We have struct kmem_cache now so use it instead of the typedef
-          kmem_cache_t.  (Pekka Enberg)
-        - Implement support for sector sizes above 512 bytes (up to the maximum
-          supported by NTFS which is 4096 bytes).
-        - Do more detailed reporting of why we cannot mount read-write by
-          special casing the VOLUME_MODIFIED_BY_CHKDSK flag.
-        - Miscellaneous updates to layout.h.
-        - Cope with attribute list attribute having invalid flags.  Windows
-          copes with this and even chkdsk does not detect or fix this so we
-          have to cope with it, too.  Thanks to Pawel Kot for reporting the
-          problem.
-2.1.25 - (Almost) fully implement write(2) and truncate(2).
-        - Change ntfs_map_runlist_nolock(), ntfs_attr_find_vcn_nolock() and
-          {__,}ntfs_cluster_free() to also take an optional attribute search
-          context as argument.  This allows calling these functions with the
-          mft record mapped.  Update all callers.
-        - Fix potential deadlock in ntfs_mft_data_extend_allocation_nolock()
-          error handling by passing in the active search context when calling
-          ntfs_cluster_free().
-        - Change ntfs_cluster_alloc() to take an extra boolean parameter
-          specifying whether the cluster are being allocated to extend an
-          attribute or to fill a hole.
-        - Change ntfs_attr_make_non_resident() to call ntfs_cluster_alloc()
-          with @is_extension set to TRUE and remove the runlist terminator
-          fixup code as this is now done by ntfs_cluster_alloc().
-        - Change ntfs_attr_make_non_resident to take the attribute value size
-          as an extra parameter.  This is needed since we need to know the size
-          before we can map the mft record and our callers always know it.  The
-          reason we cannot simply read the size from the vfs inode i_size is
-          that this is not necessarily uptodate.  This happens when
-          ntfs_attr_make_non_resident() is called in the ->truncate call path.
-        - Fix ntfs_attr_make_non_resident() to update the vfs inode i_blocks
-          which is zero for a resident attribute but should no longer be zero
-          once the attribute is non-resident as it then has real clusters
-          allocated.
-        - Add fs/ntfs/attrib.[hc]::ntfs_attr_extend_allocation(), a function to
-          extend the allocation of an attributes.  Optionally, the data size,
-          but not the initialized size can be extended, too.
-        - Implement fs/ntfs/inode.[hc]::ntfs_truncate().  It only supports
-          uncompressed and unencrypted files and it never creates sparse files
-          at least for the moment (making a file sparse requires us to modify
-          its directory entries and we do not support directory operations at
-          the moment).  Also, support for highly fragmented files, i.e. ones
-          whose data attribute is split across multiple extents, is severly
-          limited.  When such a case is encountered, EOPNOTSUPP is returned.
-        - Enable ATTR_SIZE attribute changes in ntfs_setattr().  This completes
-          the initial implementation of file truncation.  Now both open(2)ing
-          a file with the O_TRUNC flag and the {,f}truncate(2) system calls
-          will resize a file appropriately.  The limitations are that only
-          uncompressed and unencrypted files are supported.  Also, there is
-          only very limited support for highly fragmented files (the ones whose
-          $DATA attribute is split into multiple attribute extents).
-        - In attrib.c::ntfs_attr_set() call balance_dirty_pages_ratelimited()
-          and cond_resched() in the main loop as we could be dirtying a lot of
-          pages and this ensures we play nice with the VM and the system as a
-          whole.
-        - Implement file operations ->write, ->aio_write, ->writev for regular
-          files.  This replaces the old use of generic_file_write(), et al and
-          the address space operations ->prepare_write and ->commit_write.
-          This means that both sparse and non-sparse (unencrypted and
-          uncompressed) files can now be extended using the normal write(2)
-          code path.  There are two limitations at present and these are that
-          we never create sparse files and that we only have limited support
-          for highly fragmented files, i.e. ones whose data attribute is split
-          across multiple extents.   When such a case is encountered,
-          EOPNOTSUPP is returned.
-        - $EA attributes can be both resident and non-resident.
-        - Use %z for size_t to fix compilation warnings.  (Andrew Morton)
-        - Fix compilation warnings with gcc-4.0.2 on SUSE 10.0.
-        - Document extended attribute ($EA) NEED_EA flag.  (Based on libntfs
-          patch by Yura Pakhuchiy.)
-2.1.24 - Lots of bug fixes and support more clean journal states.
-        - Support journals ($LogFile) which have been modified by chkdsk.  This
-          means users can boot into Windows after we marked the volume dirty.
-          The Windows boot will run chkdsk and then reboot.  The user can then
-          immediately boot into Linux rather than having to do a full Windows
-          boot first before rebooting into Linux and we will recognize such a
-          journal and empty it as it is clean by definition.  Note, this only
-          works if chkdsk left the journal in an obviously clean state.
-        - Support journals ($LogFile) with only one restart page as well as
-          journals with two different restart pages.  We sanity check both and
-          either use the only sane one or the more recent one of the two in the
-          case that both are valid.
-        - Add fs/ntfs/malloc.h::ntfs_malloc_nofs_nofail() which is analogous to
-          ntfs_malloc_nofs() but it performs allocations with __GFP_NOFAIL and
-          hence cannot fail.
-        - Use ntfs_malloc_nofs_nofail() in the two critical regions in
-          fs/ntfs/runlist.c::ntfs_runlists_merge().  This means we no longer
-          need to panic() if the allocation fails as it now cannot fail.
-        - Fix two nasty runlist merging bugs that had gone unnoticed so far.
-          Thanks to Stefano Picerno for the bug report.
-        - Remove two bogus BUG_ON()s from fs/ntfs/mft.c.
-        - Fix handling of valid but empty mapping pairs array in
-          fs/ntfs/runlist.c::ntfs_mapping_pairs_decompress().
-        - Report unrepresentable inodes during ntfs_readdir() as KERN_WARNING
-          messages and include the inode number.  Thanks to Yura Pakhuchiy for
-          pointing this out.
-        - Change ntfs_rl_truncate_nolock() to throw away the runlist if the new
-          length is zero.
-        - Add runlist.[hc]::ntfs_rl_punch_nolock() which punches a caller
-          specified hole into a runlist.
-        - Fix a bug in fs/ntfs/index.c::ntfs_index_lookup().  When the returned
-          index entry is in the index root, we forgot to set the @ir pointer in
-          the index context.  Thanks to Yura Pakhuchiy for finding this bug.
-        - Remove bogus setting of PageError in ntfs_read_compressed_block().
-        - Add fs/ntfs/attrib.[hc]::ntfs_resident_attr_value_resize().
-        - Fix a bug in ntfs_map_runlist_nolock() where we forgot to protect
-          access to the allocated size in the ntfs inode with the size lock.
-        - Fix ntfs_attr_vcn_to_lcn_nolock() and ntfs_attr_find_vcn_nolock() to
-          return LCN_ENOENT when there is no runlist and the allocated size is
-          zero.
-        - Fix load_attribute_list() to handle the case of a NULL runlist.
-        - Fix handling of sparse attributes in ntfs_attr_make_non_resident().
-        - Add BUG() checks to ntfs_attr_make_non_resident() and ntfs_attr_set()
-          to ensure that these functions are never called for compressed or
-          encrypted attributes.
-        - Fix cluster (de)allocators to work when the runlist is NULL and more
-          importantly to take a locked runlist rather than them locking it
-          which leads to lock reversal.
-        - Truncate {a,c,m}time to the ntfs supported time granularity when
-          updating the times in the inode in ntfs_setattr().
-        - Fixup handling of sparse, compressed, and encrypted attributes in
-          fs/ntfs/inode.c::ntfs_read_locked_{,attr_,index_}inode(),
-          fs/ntfs/aops.c::ntfs_{read,write}page().
-        - Make ntfs_write_block() not instantiate sparse blocks if they contain
-          only zeroes.
-        - Optimize fs/ntfs/aops.c::ntfs_write_block() by extending the page
-          lock protection over the buffer submission for i/o which allows the
-          removal of the get_bh()/put_bh() pairs for each buffer.
-        - Fix fs/ntfs/aops.c::ntfs_{read,write}_block() to handle the case
-          where a concurrent truncate has truncated the runlist under our feet.
-        - Fix page_has_buffers()/page_buffers() handling in fs/ntfs/aops.c.
-        - In fs/ntfs/aops.c::ntfs_end_buffer_async_read(), use a bit spin lock
-          in the first buffer head instead of a driver global spin lock to
-          improve scalability.
-        - Minor fix to error handling and error message display in
-          fs/ntfs/aops.c::ntfs_prepare_nonresident_write().
-        - Change the mount options {u,f,d}mask to always parse the number as
-          an octal number to conform to how chmod(1) works, too.  Thanks to
-          Giuseppe Bilotta and Horst von Brand for pointing out the errors of
-          my ways.
-        - Fix various bugs in the runlist merging code.  (Based on libntfs
-          changes by Richard Russon.)
-        - Fix sparse warnings that have crept in over time.
-        - Change ntfs_cluster_free() to require a write locked runlist on entry
-          since we otherwise get into a lock reversal deadlock if a read locked
-          runlist is passed in. In the process also change it to take an ntfs
-          inode instead of a vfs inode as parameter.
-        - Fix the definition of the CHKD ntfs record magic.  It had an off by
-          two error causing it to be CHKB instead of CHKD.
-        - Fix a stupid bug in __ntfs_bitmap_set_bits_in_run() which caused the
-          count to become negative and hence we had a wild memset() scribbling
-          all over the system's ram.
-2.1.23 - Implement extension of resident files and make writing safe as well as
-         many bug fixes, cleanups, and enhancements...
-        - Add printk rate limiting for ntfs_warning() and ntfs_error() when
-          compiled without debug.  This avoids a possible denial of service
-          attack.  Thanks to Carl-Daniel Hailfinger from SuSE for pointing this
-          out.
-        - Fix compilation warnings on ia64.  (Randy Dunlap)
-        - Use i_size_{read,write}() instead of reading i_size by hand and cache
-          the value where apropriate.
-        - Add size_lock to the ntfs_inode structure.  This is an rw spinlock
-          and it locks against access to the inode sizes.  Note, ->size_lock
-          is also accessed from irq context so you must use the _irqsave and
-          _irqrestore lock and unlock functions, respectively.  Protect all
-          accesses to allocated_size, initialized_size, and compressed_size.
-        - Minor optimization to fs/ntfs/super.c::ntfs_statfs() and its helpers.
-        - Implement extension of resident files in the regular file write code
-          paths (fs/ntfs/aops.c::ntfs_{prepare,commit}_write()).  At present
-          this only works until the data attribute becomes too big for the mft
-          record after which we abort the write returning -EOPNOTSUPP from
-          ntfs_prepare_write().
-        - Add disable_sparse mount option together with a per volume sparse
-          enable bit which is set appropriately and a per inode sparse disable
-          bit which is preset on some system file inodes as appropriate.
-        - Enforce that sparse support is disabled on NTFS volumes pre 3.0.
-        - Fix a bug in fs/ntfs/runlist.c::ntfs_mapping_pairs_decompress() in
-          the creation of the unmapped runlist element for the base attribute
-          extent.
-        - Split ntfs_map_runlist() into ntfs_map_runlist() and a non-locking
-          helper ntfs_map_runlist_nolock() which is used by ntfs_map_runlist().
-          This allows us to map runlist fragments with the runlist lock already
-          held without having to drop and reacquire it around the call.  Adapt
-          all callers.
-        - Change ntfs_find_vcn() to ntfs_find_vcn_nolock() which takes a locked
-          runlist.  This allows us to find runlist elements with the runlist
-          lock already held without having to drop and reacquire it around the
-          call.  Adapt all callers.
-        - Change time to u64 in time.h::ntfs2utc() as it otherwise generates a
-          warning in the do_div() call on sparc32.  Thanks to Meelis Roos for
-          the report and analysis of the warning.
-        - Fix a nasty runlist merge bug when merging two holes.
-        - Set the ntfs_inode->allocated_size to the real allocated size in the
-          mft record for resident attributes (fs/ntfs/inode.c).
-        - Small readability cleanup to use "a" instead of "ctx->attr"
-          everywhere (fs/ntfs/inode.c).
-        - Make fs/ntfs/namei.c::ntfs_get_{parent,dentry} static and move the
-          definition of ntfs_export_ops from fs/ntfs/super.c to namei.c.  Also,
-          declare ntfs_export_ops in fs/ntfs/ntfs.h.
-        - Correct sparse file handling.  The compressed values need to be
-          checked and set in the ntfs inode as done for compressed files and
-          the compressed size needs to be used for vfs inode->i_blocks instead
-          of the allocated size, again, as done for compressed files.
-        - Add AT_EA in addition to AT_DATA to whitelist for being allowed to be
-          non-resident in fs/ntfs/attrib.c::ntfs_attr_can_be_non_resident().
-        - Add fs/ntfs/attrib.c::ntfs_attr_vcn_to_lcn_nolock() used by the new
-          write code.
-        - Fix bug in fs/ntfs/attrib.c::ntfs_find_vcn_nolock() where after
-          dropping the read lock and taking the write lock we were not checking
-          whether someone else did not already do the work we wanted to do.
-        - Rename fs/ntfs/attrib.c::ntfs_find_vcn_nolock() to
-          ntfs_attr_find_vcn_nolock() and update all callers.
-        - Add fs/ntfs/attrib.[hc]::ntfs_attr_make_non_resident().
-        - Fix sign of various error return values to be negative in
-          fs/ntfs/lcnalloc.c.
-        - Modify ->readpage and ->writepage (fs/ntfs/aops.c) so they detect and
-          handle the case where an attribute is converted from resident to
-          non-resident by a concurrent file write.
-        - Remove checks for NULL before calling kfree() since kfree() does the
-          checking itself.  (Jesper Juhl)
-        - Some utilities modify the boot sector but do not update the checksum.
-          Thus, relax the checking in fs/ntfs/super.c::is_boot_sector_ntfs() to
-          only emit a warning when the checksum is incorrect rather than
-          refusing the mount.  Thanks to Bernd Casimir for pointing this
-          problem out.
-        - Update attribute definition handling.
-        - Add NTFS_MAX_CLUSTER_SIZE and NTFS_MAX_PAGES_PER_CLUSTER constants.
-        - Use NTFS_MAX_CLUSTER_SIZE in super.c instead of hard coding 0x10000.
-        - Use MAX_BUF_PER_PAGE instead of variable sized array allocation for
-          better code generation and one less sparse warning in fs/ntfs/aops.c.
-        - Remove spurious void pointer casts from fs/ntfs/.  (Pekka Enberg)
-        - Use C99 style structure initialization after memory allocation where
-          possible (fs/ntfs/{attrib.c,index.c,super.c}).  Thanks to Al Viro and
-          Pekka Enberg.
-        - Stamp the transaction log ($UsnJrnl), aka user space journal, if it
-          is active on the volume and we are mounting read-write or remounting
-          from read-only to read-write.
-        - Fix a bug in address space operations error recovery code paths where
-          if the runlist was not mapped at all and a mapping error occured we
-          would leave the runlist locked on exit to the function so that the
-          next access to the same file would try to take the lock and deadlock.
-        - Detect the case when Windows has been suspended to disk on the volume
-          to be mounted and if this is the case do not allow (re)mounting
-          read-write.  This is done by parsing hiberfil.sys if present.
-        - Fix several occurences of a bug where we would perform 'var & ~const'
-          with a 64-bit variable and a int, i.e. 32-bit, constant.  This causes
-          the higher order 32-bits of the 64-bit variable to be zeroed.  To fix
-          this cast the 'const' to the same 64-bit type as 'var'.
-        - Change the runlist terminator of the newly allocated cluster(s) to
-          LCN_ENOENT in ntfs_attr_make_non_resident().  Otherwise the runlist
-          code gets confused.
-        - Add an extra parameter @last_vcn to ntfs_get_size_for_mapping_pairs()
-          and ntfs_mapping_pairs_build() to allow the runlist encoding to be
-          partial which is desirable when filling holes in sparse attributes.
-          Update all callers.
-        - Change ntfs_map_runlist_nolock() to only decompress the mapping pairs
-          if the requested vcn is inside it.  Otherwise we get into problems
-          when we try to map an out of bounds vcn because we then try to map
-          the already mapped runlist fragment which causes
-          ntfs_mapping_pairs_decompress() to fail and return error.  Update
-          ntfs_attr_find_vcn_nolock() accordingly.
-        - Fix a nasty deadlock that appeared in recent kernels.
-          The situation: VFS inode X on a mounted ntfs volume is dirty.  For
-          same inode X, the ntfs_inode is dirty and thus corresponding on-disk
-          inode, i.e. mft record, which is in a dirty PAGE_CACHE_PAGE belonging
-          to the table of inodes, i.e. $MFT, inode 0.
-          What happens:
-          Process 1: sys_sync()/umount()/whatever...  calls
-          __sync_single_inode() for $MFT -> do_writepages() -> write_page for
-          the dirty page containing the on-disk inode X, the page is now locked
-          -> ntfs_write_mst_block() which clears PageUptodate() on the page to
-          prevent anyone else getting hold of it whilst it does the write out.
-          This is necessary as the on-disk inode needs "fixups" applied before
-          the write to disk which are removed again after the write and
-          PageUptodate is then set again.  It then analyses the page looking
-          for dirty on-disk inodes and when it finds one it calls
-          ntfs_may_write_mft_record() to see if it is safe to write this
-          on-disk inode.  This then calls ilookup5() to check if the
-          corresponding VFS inode is in icache().  This in turn calls ifind()
-          which waits on the inode lock via wait_on_inode whilst holding the
-          global inode_lock.
-          Process 2: pdflush results in a call to __sync_single_inode for the
-          same VFS inode X on the ntfs volume.  This locks the inode (I_LOCK)
-          then calls write-inode -> ntfs_write_inode -> map_mft_record() ->
-          read_cache_page() for the page (in page cache of table of inodes
-          $MFT, inode 0) containing the on-disk inode.  This page has
-          PageUptodate() clear because of Process 1 (see above) so
-          read_cache_page() blocks when it tries to take the page lock for the
-          page so it can call ntfs_read_page().
-          Thus Process 1 is holding the page lock on the page containing the
-          on-disk inode X and it is waiting on the inode X to be unlocked in
-          ifind() so it can write the page out and then unlock the page.
-          And Process 2 is holding the inode lock on inode X and is waiting for
-          the page to be unlocked so it can call ntfs_readpage() or discover
-          that Process 1 set PageUptodate() again and use the page.
-          Thus we have a deadlock due to ifind() waiting on the inode lock.
-          The solution: The fix is to use the newly introduced
-          ilookup5_nowait() which does not wait on the inode's lock and hence
-          avoids the deadlock.  This is safe as we do not care about the VFS
-          inode and only use the fact that it is in the VFS inode cache and the
-          fact that the vfs and ntfs inodes are one struct in memory to find
-          the ntfs inode in memory if present.  Also, the ntfs inode has its
-          own locking so it does not matter if the vfs inode is locked.
-        - Fix bug in mft record writing where we forgot to set the device in
-          the buffers when mapping them after the VM had discarded them.
-          Thanks to Martin MOKREJÅ for the bug report.
-2.1.22 - Many bug and race fixes and error handling improvements.
-        - Improve error handling in fs/ntfs/inode.c::ntfs_truncate().
-        - Change fs/ntfs/inode.c::ntfs_truncate() to return an error code
-          instead of void and provide a helper ntfs_truncate_vfs() for the
-          vfs ->truncate method.
-        - Add a new ntfs inode flag NInoTruncateFailed() and modify
-          fs/ntfs/inode.c::ntfs_truncate() to set and clear it appropriately.
-        - Fix min_size and max_size definitions in ATTR_DEF structure in
-          fs/ntfs/layout.h to be signed.
-        - Add attribute definition handling helpers to fs/ntfs/attrib.[hc]:
-          ntfs_attr_size_bounds_check(), ntfs_attr_can_be_non_resident(), and
-          ntfs_attr_can_be_resident(), which in turn use the new private helper
-          ntfs_attr_find_in_attrdef().
-        - In fs/ntfs/aops.c::mark_ntfs_record_dirty(), take the
-          mapping->private_lock around the dirtying of the buffer heads
-          analagous to the way it is done in __set_page_dirty_buffers().
-        - Ensure the mft record size does not exceed the PAGE_CACHE_SIZE at
-          mount time as this cannot work with the current implementation.
-        - Check for location of attribute name and improve error handling in
-          general in fs/ntfs/inode.c::ntfs_read_locked_inode() and friends.
-        - In fs/ntfs/aops.c::ntfs_writepage(), if the page is fully outside
-          i_size, i.e. race with truncate, invalidate the buffers on the page
-          so that they become freeable and hence the page does not leak.
-        - Remove unused function fs/ntfs/runlist.c::ntfs_rl_merge().  (Adrian
-          Bunk)
-        - Fix stupid bug in fs/ntfs/attrib.c::ntfs_attr_find() that resulted in
-          a NULL pointer dereference in the error code path when a corrupt
-          attribute was found.  (Thanks to Domen Puncer for the bug report.)
-        - Add MODULE_VERSION() to fs/ntfs/super.c.
-        - Make several functions and variables static.  (Adrian Bunk)
-        - Modify fs/ntfs/aops.c::mark_ntfs_record_dirty() so it allocates
-          buffers for the page if they are not present and then marks the
-          buffers belonging to the ntfs record dirty.  This causes the buffers
-          to become busy and hence they are safe from removal until the page
-          has been written out.
-        - Fix stupid bug in fs/ntfs/attrib.c::ntfs_external_attr_find() in the
-          error handling code path that resulted in a BUG() due to trying to
-          unmap an extent mft record when the mapping of it had failed and it
-          thus was not mapped.  (Thanks to Ken MacFerrin for the bug report.)
-        - Drop the runlist lock after the vcn has been read in
-          fs/ntfs/lcnalloc.c::__ntfs_cluster_free().
-        - Rewrite handling of multi sector transfer errors.  We now do not set
-          PageError() when such errors are detected in the async i/o handler
-          fs/ntfs/aops.c::ntfs_end_buffer_async_read().  All users of mst
-          protected attributes now check the magic of each ntfs record as they
-          use it and act appropriately.  This has the effect of making errors
-          granular per ntfs record rather than per page which solves the case
-          where we cannot access any of the ntfs records in a page when a
-          single one of them had an mst error.  (Thanks to Ken MacFerrin for
-          the bug report.)
-        - Fix error handling in fs/ntfs/quota.c::ntfs_mark_quotas_out_of_date()
-          where we failed to release i_mutex on the $Quota/$Q attribute inode.
-        - Fix bug in handling of bad inodes in fs/ntfs/namei.c::ntfs_lookup().
-        - Add mapping of unmapped buffers to all remaining code paths, i.e.
-          fs/ntfs/aops.c::ntfs_write_mst_block(), mft.c::ntfs_sync_mft_mirror(),
-          and write_mft_record_nolock().  From now on we require that the
-          complete runlist for the mft mirror is always mapped into memory.
-        - Add creation of buffers to fs/ntfs/mft.c::ntfs_sync_mft_mirror().
-        - Improve error handling in fs/ntfs/aops.c::ntfs_{read,write}_block().
-        - Cleanup fs/ntfs/aops.c::ntfs_{read,write}page() since we know that a
-          resident attribute will be smaller than a page which makes the code
-          simpler.  Also make the code more tolerant to concurrent ->truncate.
-2.1.21 - Fix some races and bugs, rewrite mft write code, add mft allocator.
-        - Implement extent mft record deallocation
-          fs/ntfs/mft.c::ntfs_extent_mft_record_free().
-        - Splitt runlist related functions off from attrib.[hc] to runlist.[hc].
-        - Add vol->mft_data_pos and initialize it at mount time.
-        - Rename init_runlist() to ntfs_init_runlist(), ntfs_vcn_to_lcn() to
-          ntfs_rl_vcn_to_lcn(), decompress_mapping_pairs() to
-          ntfs_mapping_pairs_decompress(), ntfs_merge_runlists() to
-          ntfs_runlists_merge() and adapt all callers.
-        - Add fs/ntfs/runlist.[hc]::ntfs_get_nr_significant_bytes(),
-          ntfs_get_size_for_mapping_pairs(), ntfs_write_significant_bytes(),
-          and ntfs_mapping_pairs_build(), adapted from libntfs.
-        - Make fs/ntfs/lcnalloc.c::ntfs_cluster_free_from_rl_nolock() not
-          static and add a declaration for it to lcnalloc.h.
-        - Add fs/ntfs/lcnalloc.h::ntfs_cluster_free_from_rl() which is a static
-          inline wrapper for ntfs_cluster_free_from_rl_nolock() which takes the
-          cluster bitmap lock for the duration of the call.
-        - Add fs/ntfs/attrib.[hc]::ntfs_attr_record_resize().
-        - Implement the equivalent of memset() for an ntfs attribute in
-          fs/ntfs/attrib.[hc]::ntfs_attr_set() and switch
-          fs/ntfs/logfile.c::ntfs_empty_logfile() to using it.
-        - Remove unnecessary casts from LCN_* constants.
-        - Implement fs/ntfs/runlist.c::ntfs_rl_truncate_nolock().
-        - Add MFT_RECORD_OLD as a copy of MFT_RECORD in fs/ntfs/layout.h and
-          change MFT_RECORD to contain the NTFS 3.1+ specific fields.
-        - Add a helper function fs/ntfs/aops.c::mark_ntfs_record_dirty() which
-          marks all buffers belonging to an ntfs record dirty, followed by
-          marking the page the ntfs record is in dirty and also marking the vfs
-          inode containing the ntfs record dirty (I_DIRTY_PAGES).
-        - Switch fs/ntfs/index.h::ntfs_index_entry_mark_dirty() to using the
-          new helper fs/ntfs/aops.c::mark_ntfs_record_dirty() and remove the no
-          longer needed fs/ntfs/index.[hc]::__ntfs_index_entry_mark_dirty().
-        - Move ntfs_{un,}map_page() from ntfs.h to aops.h and fix resulting
-          include errors.
-        - Move the typedefs for runlist_element and runlist from types.h to
-          runlist.h and fix resulting include errors.
-        - Remove unused {__,}format_mft_record() from fs/ntfs/mft.c.
-        - Modify fs/ntfs/mft.c::__mark_mft_record_dirty() to use the helper
-          mark_ntfs_record_dirty() which also changes the behaviour in that we
-          now set the buffers belonging to the mft record dirty as well as the
-          page itself.
-        - Update fs/ntfs/mft.c::write_mft_record_nolock() and sync_mft_mirror()
-          to cope with the fact that there now are dirty buffers in mft pages.
-        - Update fs/ntfs/inode.c::ntfs_write_inode() to also use the helper
-          mark_ntfs_record_dirty() and thus to set the buffers belonging to the
-          mft record dirty as well as the page itself.
-        - Fix compiler warnings on x86-64 in fs/ntfs/dir.c.  (Randy Dunlap,
-          slightly modified by me)
-        - Add fs/ntfs/mft.c::try_map_mft_record() which fails with -EALREADY if
-          the mft record is already locked and otherwise behaves the same way
-          as fs/ntfs/mft.c::map_mft_record().
-        - Modify fs/ntfs/mft.c::write_mft_record_nolock() so that it only
-          writes the mft record if the buffers belonging to it are dirty.
-          Otherwise we assume that it was written out by other means already.
-        - Attempting to write outside initialized size is _not_ a bug so remove
-          the bug check from fs/ntfs/aops.c::ntfs_write_mst_block().  It is in
-          fact required to write outside initialized size when preparing to
-          extend the initialized size.
-        - Map the page instead of using page_address() before writing to it in
-          fs/ntfs/aops.c::ntfs_mft_writepage().
-        - Provide exclusion between opening an inode / mapping an mft record
-          and accessing the mft record in fs/ntfs/mft.c::ntfs_mft_writepage()
-          by setting the page not uptodate throughout ntfs_mft_writepage().
-        - Clear the page uptodate flag in fs/ntfs/aops.c::ntfs_write_mst_block()
-          to ensure noone can see the page whilst the mst fixups are applied.
-        - Add the helper fs/ntfs/mft.c::ntfs_may_write_mft_record() which
-          checks if an mft record may be written out safely obtaining any
-          necessary locks in the process.  This is used by
-          fs/ntfs/aops.c::ntfs_write_mst_block().
-        - Modify fs/ntfs/aops.c::ntfs_write_mst_block() to also work for
-          writing mft records and improve its error handling in the process.
-          Now if any of the records in the page fail to be written out, all
-          other records will be written out instead of aborting completely.
-        - Remove ntfs_mft_aops and update all users to use ntfs_mst_aops.
-        - Modify fs/ntfs/inode.c::ntfs_read_locked_inode() to set the
-          ntfs_mst_aops for all inodes which are NInoMstProtected() and
-          ntfs_aops for all other inodes.
-        - Rename fs/ntfs/mft.c::sync_mft_mirror{,_umount}() to
-          ntfs_sync_mft_mirror{,_umount}() and change their parameters so they
-          no longer require an ntfs inode to be present.  Update all callers.
-        - Cleanup the error handling in fs/ntfs/mft.c::ntfs_sync_mft_mirror().
-        - Clear the page uptodate flag in fs/ntfs/mft.c::ntfs_sync_mft_mirror()
-          to ensure noone can see the page whilst the mst fixups are applied.
-        - Remove the no longer needed fs/ntfs/mft.c::ntfs_mft_writepage() and
-          fs/ntfs/mft.c::try_map_mft_record().
-        - Fix callers of fs/ntfs/aops.c::mark_ntfs_record_dirty() to call it
-          with the ntfs inode which contains the page rather than the ntfs
-          inode the mft record of which is in the page.
-        - Fix race condition in fs/ntfs/inode.c::ntfs_put_inode() by moving the
-          index inode bitmap inode release code from there to
-          fs/ntfs/inode.c::ntfs_clear_big_inode().  (Thanks to Christoph
-          Hellwig for spotting this.)
-        - Fix race condition in fs/ntfs/inode.c::ntfs_put_inode() by taking the
-          inode semaphore around the code that sets ni->itype.index.bmp_ino to
-          NULL and reorganize the code to optimize it a bit.  (Thanks to
-          Christoph Hellwig for spotting this.)
-        - Modify fs/ntfs/aops.c::mark_ntfs_record_dirty() to no longer take the
-          ntfs inode as a parameter as this is confusing and misleading and the
-          needed ntfs inode is available via NTFS_I(page->mapping->host).
-          Adapt all callers to this change.
-        - Modify fs/ntfs/mft.c::write_mft_record_nolock() and
-          fs/ntfs/aops.c::ntfs_write_mst_block() to only check the dirty state
-          of the first buffer in a record and to take this as the ntfs record
-          dirty state.  We cannot look at the dirty state for subsequent
-          buffers because we might be racing with
-          fs/ntfs/aops.c::mark_ntfs_record_dirty().
-        - Move the static inline ntfs_init_big_inode() from fs/ntfs/inode.c to
-          inode.h and make fs/ntfs/inode.c::__ntfs_init_inode() non-static and
-          add a declaration for it to inode.h.  Fix some compilation issues
-          that resulted due to #includes and header file interdependencies.
-        - Simplify setup of i_mode in fs/ntfs/inode.c::ntfs_read_locked_inode().
-        - Add helpers fs/ntfs/layout.h::MK_MREF() and MK_LE_MREF().
-        - Modify fs/ntfs/mft.c::map_extent_mft_record() to only verify the mft
-          record sequence number if it is specified (i.e. not zero).
-        - Add fs/ntfs/mft.[hc]::ntfs_mft_record_alloc() and various helper
-          functions used by it.
-        - Update Documentation/filesystems/ntfs.txt with instructions on how to
-          use the Device-Mapper driver with NTFS ftdisk/LDM raid.  This removes
-          the linear raid problem with the Software RAID / MD driver when one
-          or more of the devices has an odd number of sectors.
-2.1.20 - Fix two stupid bugs introduced in 2.1.18 release.
-        - Fix stupid bug in fs/ntfs/attrib.c::ntfs_attr_reinit_search_ctx()
-          where we did not clear ctx->al_entry but it was still set due to
-          changes in ntfs_attr_lookup() and ntfs_external_attr_find() in
-          particular.
-        - Fix another stupid bug in fs/ntfs/attrib.c::ntfs_external_attr_find()
-          where we forgot to unmap the extent mft record when we had finished
-          enumerating an attribute which caused a bug check to trigger when the
-          VFS calls ->clear_inode.
-2.1.19 - Many cleanups, improvements, and a minor bug fix.
-        - Update ->setattr (fs/ntfs/inode.c::ntfs_setattr()) to refuse to
-          change the uid, gid, and mode of an inode as we do not support NTFS
-          ACLs yet.
-        - Remove BKL use from ntfs_setattr() syncing up with the rest of the
-          kernel.
-        - Get rid of the ugly transparent union in fs/ntfs/dir.c::ntfs_readdir()
-          and ntfs_filldir() as per suggestion from Al Viro.
-        - Change '\0' and L'\0' to simply 0 as per advice from Linus Torvalds.
-        - Update ->truncate (fs/ntfs/inode.c::ntfs_truncate()) to check if the
-          inode size has changed and to only output an error if so.
-        - Rename fs/ntfs/attrib.h::attribute_value_length() to ntfs_attr_size().
-        - Add le{16,32,64} as well as sle{16,32,64} data types to
-          fs/ntfs/types.h.
-        - Change ntfschar to be le16 instead of u16 in fs/ntfs/types.h.
-        - Add le versions of VCN, LCN, and LSN called leVCN, leLCN, and leLSN,
-          respectively, to fs/ntfs/types.h.
-        - Update endianness conversion macros in fs/ntfs/endian.h to use the
-          new types as appropriate.
-        - Do proper type casting when using sle64_to_cpup() in fs/ntfs/dir.c
-          and index.c.
-        - Add leMFT_REF data type to fs/ntfs/layout.h.
-        - Update all NTFS header files with the new little endian data types.
-          Affected files are fs/ntfs/layout.h, logfile.h, and time.h.
-        - Do proper type casting when using ntfs_is_*_recordp() in
-          fs/ntfs/logfile.c, mft.c, and super.c. 
-        - Fix all the sparse bitwise warnings.  Had to change all the typedef
-          enums storing little endian values to simple enums plus a typedef for
-          the datatype to make sparse happy.
-        - Fix a bug found by the new sparse bitwise warnings where the default
-          upcase table was defined as a pointer to wchar_t rather than ntfschar
-          in fs/ntfs/ntfs.h and super.c.
-        - Change {const_,}cpu_to_le{16,32}(0) to just 0 as suggested by Al Viro.
-2.1.18 - Fix scheduling latencies at mount time as well as an endianness bug.
-        - Remove vol->nr_mft_records as it was pretty meaningless and optimize
-          the calculation of total/free inodes as used by statfs().
-        - Fix scheduling latencies in ntfs_fill_super() by dropping the BKL
-          because the code itself is using the ntfs_lock semaphore which
-          provides safe locking.  (Ingo Molnar)
-        - Fix a potential bug in fs/ntfs/mft.c::map_extent_mft_record() that
-          could occur in the future for when we start closing/freeing extent
-          inodes if we don't set base_ni->ext.extent_ntfs_inos to NULL after
-          we free it.
-        - Rename {find,lookup}_attr() to ntfs_attr_{find,lookup}() as well as
-          find_external_attr() to ntfs_external_attr_find() to cleanup the
-          namespace a bit and to be more consistent with libntfs.
-        - Rename {{re,}init,get,put}_attr_search_ctx() to
-          ntfs_attr_{{re,}init,get,put}_search_ctx() as well as the type
-          attr_search_context to ntfs_attr_search_ctx.
-        - Force use of ntfs_attr_find() in ntfs_attr_lookup() when searching
-          for the attribute list attribute itself.
-        - Fix endianness bug in ntfs_external_attr_find().
-        - Change ntfs_{external_,}attr_find() to return 0 on success, -ENOENT
-          if the attribute is not found, and -EIO on real error.  In the case
-          of -ENOENT, the search context is updated to describe the attribute
-          before which the attribute being searched for would need to be
-          inserted if such an action were to be desired and in the case of
-          ntfs_external_attr_find() the search context is also updated to
-          indicate the attribute list entry before which the attribute list
-          entry of the attribute being searched for would need to be inserted
-          if such an action were to be desired.  Also make ntfs_find_attr()
-          static and remove its prototype from attrib.h as it is not used
-          anywhere other than attrib.c.  Update ntfs_attr_lookup() and all
-          callers of ntfs_{external,}attr_{find,lookup}() for the new return
-          values.
-        - Minor cleanup of fs/ntfs/inode.c::ntfs_init_locked_inode().
-2.1.17 - Fix bugs in mount time error code paths and other updates.
-        - Implement bitmap modification code (fs/ntfs/bitmap.[hc]).  This
-          includes functions to set/clear a single bit or a run of bits.
-        - Add fs/ntfs/attrib.[hc]::ntfs_find_vcn() which returns the locked
-          runlist element containing a particular vcn.  It also takes care of
-          mapping any needed runlist fragments.
-        - Implement cluster (de-)allocation code (fs/ntfs/lcnalloc.[hc]).
-        - Load attribute definition table from $AttrDef at mount time.
-        - Fix bugs in mount time error code paths involving (de)allocation of
-          the default and volume upcase tables.
-        - Remove ntfs_nr_mounts as it is no longer used.
-2.1.16 - Implement access time updates, file sync, async io, and read/writev.
-        - Add support for readv/writev and aio_read/aio_write (fs/ntfs/file.c).
-          This is done by setting the appropriate file operations pointers to
-          the generic helper functions provided by mm/filemap.c.
-        - Implement fsync, fdatasync, and msync both for files (fs/ntfs/file.c)
-          and directories (fs/ntfs/dir.c).
-        - Add support for {a,m,c}time updates to inode.c::ntfs_write_inode().
-          Note, except for the root directory and any other system files opened
-          by the user, the system files will not have their access times
-          updated as they are only accessed at the inode level an hence the
-          file level functions which cause the times to be updated are never
-          invoked.
-2.1.15 - Invalidate quotas when (re)mounting read-write.
-        - Add new element itype.index.collation_rule to the ntfs inode
-          structure and set it appropriately in ntfs_read_locked_inode().
-        - Implement a new inode type "index" to allow efficient access to the
-          indices found in various system files and adapt inode handling
-          accordingly (fs/ntfs/inode.[hc]).  An index inode is essentially an
-          attribute inode (NInoAttr() is true) with an attribute type of
-          AT_INDEX_ALLOCATION.  As such, it is no longer allowed to call
-          ntfs_attr_iget() with an attribute type of AT_INDEX_ALLOCATION as
-          there would be no way to distinguish between normal attribute inodes
-          and index inodes.  The function to obtain an index inode is
-          ntfs_index_iget() and it uses the helper function
-          ntfs_read_locked_index_inode().  Note, we do not overload
-          ntfs_attr_iget() as indices consist of multiple attributes so using
-          ntfs_attr_iget() to obtain an index inode would be confusing.
-        - Ensure that there is no overflow when doing page->index <<
-          PAGE_CACHE_SHIFT by casting page->index to s64 in fs/ntfs/aops.c.
-        - Use atomic kmap instead of kmap() in fs/ntfs/aops.c::ntfs_read_page()
-          and ntfs_read_block().
-        - Use case sensitive attribute lookups instead of case insensitive ones.
-        - Lock all page cache pages belonging to mst protected attributes while
-          accessing them to ensure we never see corrupt data while the page is
-          under writeout.
-        - Add framework for generic ntfs collation (fs/ntfs/collation.[hc]).
-          We have ntfs_is_collation_rule_supported() to check if the collation
-          rule you want to use is supported and ntfs_collation() which actually
-          collates two data items.  We currently only support COLLATION_BINARY
-          and COLLATION_NTOFS_ULONG but support for other collation rules will
-          be added as the need arises.
-        - Add a new type, ntfs_index_context, to allow retrieval of an index
-          entry using the corresponding index key.  To get an index context,
-          use ntfs_index_ctx_get() and to release it, use ntfs_index_ctx_put().
-          This also adds a new slab cache for the index contexts.  To lookup a
-          key in an index inode, use ntfs_index_lookup().  After modifying an
-          index entry, call ntfs_index_entry_flush_dcache_page() followed by
-          ntfs_index_entry_mark_dirty() to ensure the changes are written out
-          to disk.  For details see fs/ntfs/index.[hc].  Note, at present, if
-          an index entry is in the index allocation attribute rather than the
-          index root attribute it will not be written out (you will get a
-          warning message about discarded changes instead).
-        - Load the quota file ($Quota) and check if quota tracking is enabled
-          and if so, mark the quotas out of date.  This causes windows to
-          rescan the volume on boot and update all quota entries.
-        - Add a set_page_dirty address space operation for ntfs_m[fs]t_aops.
-          It is simply set to __set_page_dirty_nobuffers() to make sure that
-          running set_page_dirty() on a page containing mft/ntfs records will
-          not affect the dirty state of the page buffers.
-        - Add fs/ntfs/index.c::__ntfs_index_entry_mark_dirty() which sets all
-          buffers that are inside the ntfs record in the page dirty after which
-          it sets the page dirty.  This allows ->writepage to only write the
-          dirty index records rather than having to write all the records in
-          the page.  Modify fs/ntfs/index.h::ntfs_index_entry_mark_dirty() to
-          use this rather than __set_page_dirty_nobuffers().
-        - Implement fs/ntfs/aops.c::ntfs_write_mst_block() which enables the
-          writing of page cache pages belonging to mst protected attributes
-          like the index allocation attribute in directory indices and other
-          indices like $Quota/$Q, etc.  This means that the quota is now marked
-          out of date on all volumes rather than only on ones where the quota
-          defaults entry is in the index root attribute of the $Quota/$Q index.
-2.1.14 - Fix an NFSd caused deadlock reported by several users.
-        - Modify fs/ntfs/ntfs_readdir() to copy the index root attribute value
-          to a buffer so that we can put the search context and unmap the mft
-          record before calling the filldir() callback.  We need to do this
-          because of NFSd which calls ->lookup() from its filldir callback()
-          and this causes NTFS to deadlock as ntfs_lookup() maps the mft record
-          of the directory and since ntfs_readdir() has got it mapped already
-          ntfs_lookup() deadlocks.
-2.1.13 - Enable overwriting of resident files and housekeeping of system files.
-        - Implement writing of mft records (fs/ntfs/mft.[hc]), which includes
-          keeping the mft mirror in sync with the mft when mirrored mft records
-          are written.  The functions are write_mft_record{,_nolock}().  The
-          implementation is quite rudimentary for now with lots of things not
-          implemented yet but I am not sure any of them can actually occur so
-          I will wait for people to hit each one and only then implement it.
-        - Commit open system inodes at umount time.  This should make it
-          virtually impossible for sync_mft_mirror_umount() to ever be needed.
-        - Implement ->write_inode (fs/ntfs/inode.c::ntfs_write_inode()) for the
-          ntfs super operations.  This gives us inode writing via the VFS inode
-          dirty code paths.  Note:  Access time updates are not implemented yet.
-        - Implement fs/ntfs/mft.[hc]::{,__}mark_mft_record_dirty() and make
-          fs/ntfs/aops.c::ntfs_writepage() and ntfs_commit_write() use it, thus
-          finally enabling resident file overwrite!  (-8  This also includes a
-          placeholder for ->writepage (ntfs_mft_writepage()), which for now
-          just redirties the page and returns.  Also, at umount time, we for
-          now throw away all mft data page cache pages after the last call to
-          ntfs_commit_inode() in the hope that all inodes will have been
-          written out by then and hence no dirty (meta)data will be lost.  We
-          also check for this case and emit an error message telling the user
-          to run chkdsk.
-        - Use set_page_writeback() and end_page_writeback() in the resident
-          attribute code path of fs/ntfs/aops.c::ntfs_writepage() otherwise
-          the radix-tree tag PAGECACHE_TAG_DIRTY remains set even though the
-          page is clean.
-        - Implement ntfs_mft_writepage() so it now checks if any of the mft
-          records in the page are dirty and if so redirties the page and
-          returns.  Otherwise it just returns (after doing set_page_writeback(),
-          unlock_page(), end_page_writeback() or the radix-tree tag
-          PAGECACHE_TAG_DIRTY remains set even though the page is clean), thus
-          alowing the VM to do with the page as it pleases.  Also, at umount
-          time, now only throw away dirty mft (meta)data pages if dirty inodes
-          are present and ask the user to email us if they see this happening.
-        - Add functions ntfs_{clear,set}_volume_flags(), to modify the volume
-          information flags (fs/ntfs/super.c).
-        - Mark the volume dirty when (re)mounting read-write and mark it clean
-          when unmounting or remounting read-only.  If any volume errors are
-          found, the volume is left marked dirty to force chkdsk to run.
-        - Add code to set the NT4 compatibility flag when (re)mounting
-          read-write for newer NTFS versions but leave it commented out for now
-          since we do not make any modifications that are NTFS 1.2 specific yet
-          and since setting this flag breaks Captive-NTFS which is not nice.
-          This code must be enabled once we start writing NTFS 1.2 specific
-          changes otherwise Windows NTFS driver might crash / cause corruption.
-2.1.12 - Fix the second fix to the decompression engine and some cleanups.
-        - Add a new address space operations struct, ntfs_mst_aops, for mst
-          protected attributes.  This is because the default ntfs_aops do not
-          make sense with mst protected data and were they to write anything to
-          such an attribute they would cause data corruption so we provide
-          ntfs_mst_aops which does not have any write related operations set.
-        - Cleanup dirty ntfs inode handling (fs/ntfs/inode.[hc]) which also
-          includes an adapted ntfs_commit_inode() and an implementation of
-          ntfs_write_inode() which for now just cleans dirty inodes without
-          writing them (it does emit a warning that this is happening).
-        - Undo the second decompression engine fix (see 2.1.9 release ChangeLog
-          entry) as it was only fixing a theoretical bug but at the same time
-          it badly broke the handling of sparse and uncompressed compression
-          blocks.
-2.1.11 - Driver internal cleanups.
-        - Only build logfile.o if building the driver with read-write support.
-        - Really final white space cleanups.
-        - Use generic_ffs() instead of ffs() in logfile.c which allows the
-          log_page_size variable to be optimized by gcc into a constant.
-        - Rename uchar_t to ntfschar everywhere as uchar_t is unsigned 1-byte
-          char as defined by POSIX and as found on some systems.
-2.1.10 - Force read-only (re)mounting of volumes with unsupported volume flags.
-        - Finish off the white space cleanups (remove trailing spaces, etc).
-        - Clean up ntfs_fill_super() and ntfs_read_inode_mount() by removing
-          the kludges around the first iget().  Instead of (re)setting ->s_op
-          we have the $MFT inode set up by explicit new_inode() / set ->i_ino /
-          insert_inode_hash() / call ntfs_read_inode_mount() directly.  This
-          kills the need for second super_operations and allows to return error
-          from ntfs_read_inode_mount() without resorting to ugly "poisoning"
-          tricks.  (Al Viro)
-        - Force read-only (re)mounting if any of the following bits are set in
-          the volume information flags:
-                VOLUME_IS_DIRTY, VOLUME_RESIZE_LOG_FILE,
-                VOLUME_UPGRADE_ON_MOUNT, VOLUME_DELETE_USN_UNDERWAY,
-                VOLUME_REPAIR_OBJECT_ID, VOLUME_MODIFIED_BY_CHKDSK
-          To make this easier we define VOLUME_MUST_MOUNT_RO_MASK with all the
-          above bits set so the test is made easy.
-2.1.9 - Fix two bugs in decompression engine.
-        - Fix a bug where we would not always detect that we have reached the
-          end of a compression block because we were ending at minus one byte
-          which is effectively the same as being at the end.  The fix is to
-          check whether the uncompressed buffer has been fully filled and if so
-          we assume we have reached the end of the compression block.  A big
-          thank you to Marcin Gibuła for the bug report, the assistance in
-          tracking down the bug and testing the fix.
-        - Fix a possible bug where when a compressed read is truncated to the
-          end of the file, the offset inside the last page was not truncated.
-2.1.8 - Handle $MFT mirror and $LogFile, improve time handling, and cleanups.
-        - Use get_bh() instead of manual atomic_inc() in fs/ntfs/compress.c.
-        - Modify fs/ntfs/time.c::ntfs2utc(), get_current_ntfs_time(), and
-          utc2ntfs() to work with struct timespec instead of time_t on the
-          Linux UTC time side thus preserving the full precision of the NTFS
-          time and only loosing up to 99 nano-seconds in the Linux UTC time.
-        - Move fs/ntfs/time.c to fs/ntfs/time.h and make the time functions
-          static inline.
-        - Remove unused ntfs_dirty_inode().
-        - Cleanup super operations declaration in fs/ntfs/super.c.
-        - Wrap flush_dcache_mft_record_page() in #ifdef NTFS_RW.
-        - Add NInoTestSetFoo() and NInoTestClearFoo() macro magic to
-          fs/ntfs/inode.h and use it to declare NInoTest{Set,Clear}Dirty.
-        - Move typedefs for ntfs_attr and test_t from fs/ntfs/inode.c to
-          fs/ntfs/inode.h so they can be used elsewhere.
-        - Determine the mft mirror size as the number of mirrored mft records
-          and store it in ntfs_volume->mftmirr_size (fs/ntfs/super.c).
-        - Load the mft mirror at mount time and compare the mft records stored
-          in it to the ones in the mft.  Force a read-only mount if the two do
-          not match (fs/ntfs/super.c).
-        - Fix type casting related warnings on 64-bit architectures.  Thanks
-          to Meelis Roos for reporting them.
-        - Move %L to %ll as %L is floating point and %ll is integer which is
-          what we want.
-        - Read the journal ($LogFile) and determine if the volume has been
-          shutdown cleanly and force a read-only mount if not (fs/ntfs/super.c
-          and fs/ntfs/logfile.c).  This is a little bit of a crude check in
-          that we only look at the restart areas and not at the actual log
-          records so that there will be a very small number of cases where we
-          think that a volume is dirty when in fact it is clean.  This should
-          only affect volumes that have not been shutdown cleanly and did not
-          have any pending, non-check-pointed i/o.
-        - If the $LogFile indicates a clean shutdown and a read-write (re)mount
-          is requested, empty $LogFile by overwriting it with 0xff bytes to
-          ensure that Windows cannot cause data corruption by replaying a stale
-          journal after Linux has written to the volume.
-2.1.7 - Enable NFS exporting of mounted NTFS volumes.
-        - Set i_generation in the VFS inode from the seq_no of the NTFS inode.
-        - Make ntfs_lookup() NFS export safe, i.e. use d_splice_alias(), etc.
-        - Implement ->get_dentry() in fs/ntfs/namei.c::ntfs_get_dentry() as the
-          default doesn't allow inode number 0 which is a valid inode on NTFS
-          and even if it did allow that it uses iget() instead of ntfs_iget()
-          which makes it useless for us.
-        - Implement ->get_parent() in fs/ntfs/namei.c::ntfs_get_parent() as the
-          default just returns -EACCES which is not very useful.
-        - Define export operations (->s_export_op) for NTFS (ntfs_export_ops)
-          and set them up in the super block at mount time (super.c) this
-          allows mounted NTFS volumes to be exported via NFS.
-        - Add missing return -EOPNOTSUPP; in
-          fs/ntfs/aops.c::ntfs_commit_nonresident_write().
-        - Enforce no atime and no dir atime updates at mount/remount time as
-          they are not implemented yet anyway.
-        - Move a few assignments in fs/ntfs/attrib.c::load_attribute_list() to
-          after a NULL check.  Thanks to Dave Jones for pointing this out.
-2.1.6 - Fix minor bug in handling of compressed directories.
-        - Fix bug in handling of compressed directories.  A compressed
-          directory is not really compressed so when we set the ->i_blocks
-          field of a compressed directory inode we were setting it from the
-          non-existing field ni->itype.compressed.size which gave random
-          results...  For directories we now always use ni->allocated_size.
-2.1.5 - Fix minor bug in attribute list attribute handling.
-        - Fix bug in attribute list handling.  Actually it is not as much a bug
-          as too much protection in that we were not allowing attribute lists
-          which waste space on disk while Windows XP clearly allows it and in
-          fact creates such attribute lists so our driver was failing.
-        - Update NTFS documentation ready for 2.6 kernel release.
-2.1.4 - Reduce compiler requirements.
-        - Remove all uses of unnamed structs and unions in the driver to make
-          old and newer gcc versions happy. Makes it a bit uglier IMO but at
-          least people will stop hassling me about it.
-2.1.3 - Important bug fixes in corner cases.
-        - super.c::parse_ntfs_boot_sector(): Correct the check for 64-bit
-          clusters. (Philipp Thomas)
-        - attrib.c::load_attribute_list(): Fix bug when initialized_size is a
-          multiple of the block_size but not the cluster size. (Szabolcs
-          Szakacsits)
-2.1.2 - Important bug fixes aleviating the hangs in statfs.
-        - Fix buggy free cluster and free inode determination logic.
-2.1.1 - Minor updates.
-        - Add handling for initialized_size != data_size in compressed files.
-        - Reduce function local stack usage from 0x3d4 bytes to just noise in
-          fs/ntfs/upcase.c. (Randy Dunlap)
-        - Remove compiler warnings for newer gcc.
-        - Pages are no longer kmapped by mm/filemap.c::generic_file_write()
-          around calls to ->{prepare,commit}_write.  Adapt NTFS appropriately
-          in fs/ntfs/aops.c::ntfs_prepare_nonresident_write() by using
-          kmap_atomic(KM_USER0).
-2.1.0 - First steps towards write support: implement file overwrite.
-        - Add configuration option for developmental write support with an
-          appropriately scary configuration help text.
-        - Initial implementation of fs/ntfs/aops.c::ntfs_writepage() and its
-          helper fs/ntfs/aops.c::ntfs_write_block(). This enables mmap(2) based
-          overwriting of existing files on ntfs. Note: Resident files are
-          only written into memory, and not written out to disk at present, so
-          avoid writing to files smaller than about 1kiB.
-        - Initial implementation of fs/ntfs/aops.c::ntfs_prepare_write(), its
-          helper fs/ntfs/aops.c::ntfs_prepare_nonresident_write() and their
-          counterparts, fs/ntfs/aops.c::ntfs_commit_write(), and
-          fs/ntfs/aops.c::ntfs_commit_nonresident_write(), respectively. Also,
-          add generic_file_write() to the ntfs file operations (fs/ntfs/file.c).
-          This enables write(2) based overwriting of existing files on ntfs.
-          Note: As with mmap(2) based overwriting, resident files are only
-          written into memory, and not written out to disk at present, so avoid
-          writing to files smaller than about 1kiB.
-        - Implement ->truncate (fs/ntfs/inode.c::ntfs_truncate()) and
-          ->setattr() (fs/ntfs/inode.c::ntfs_setattr()) inode operations for
-          files with the purpose of intercepting and aborting all i_size
-          changes which we do not support yet. ntfs_truncate() actually only
-          emits a warning message but AFAICS our interception of i_size changes
-          elsewhere means ntfs_truncate() never gets called for i_size changes.
-          It is only called from generic_file_write() when we fail in
-          ntfs_prepare_{,nonresident_}write() in order to discard any
-          instantiated buffers beyond i_size. Thus i_size is not actually
-          changed so our warning message is enough. Unfortunately it is not
-          possible to easily determine if i_size is being changed or not hence
-          we just emit an appropriately worded error message.
-2.0.25 - Small bug fixes and cleanups.
-        - Unlock the page in an out of memory error code path in
-          fs/ntfs/aops.c::ntfs_read_block().
-        - If fs/ntfs/aops.c::ntfs_read_page() is called on an uptodate page,
-          just unlock the page and return. (This can happen due to ->writepage
-          clearing PageUptodate() during write out of MstProtected()
-          attributes.
-        - Remove leaked write code again.
-2.0.24 - Cleanups.
-        - Treat BUG_ON() as ASSERT() not VERIFY(), i.e. do not use side effects
-          inside BUG_ON(). (Adam J. Richter)
-        - Split logical OR expressions inside BUG_ON() into individual BUG_ON()
-          calls for improved debugging. (Adam J. Richter)
-        - Add errors flag to the ntfs volume state, accessed via
-          NVol{,Set,Clear}Errors(vol).
-        - Do not allow read-write remounts of read-only volumes with errors.
-        - Clarify comment for ntfs file operation sendfile which was added by
-          Christoph Hellwig a while ago (just using generic_file_sendfile())
-          to say that ntfs ->sendfile is only used for the case where the
-          source data is on the ntfs partition and the destination is
-          somewhere else, i.e. nothing we need to concern ourselves with.
-        - Add generic_file_write() as our ntfs file write operation.
-2.0.23 - Major bug fixes (races, deadlocks, non-i386 architectures).
-        - Massive internal locking changes to mft record locking. Fixes lock
-          recursion and replaces the mrec_lock read/write semaphore with a
-          mutex. Also removes the now superfluous mft_count. This fixes several
-          race conditions and deadlocks, especially in the future write code.
-        - Fix ntfs over loopback for compressed files by adding an
-          optimization barrier. (gcc was screwing up otherwise ?)
-        - Miscellaneous cleanups all over the code and a fix or two in error
-          handling code paths.
-        Thanks go to Christoph Hellwig for pointing out the following two:
-        - Remove now unused function fs/ntfs/malloc.h::vmalloc_nofs().
-        - Fix ntfs_free() for ia64 and parisc by checking for VMALLOC_END, too.
-2.0.22 - Cleanups, mainly to ntfs_readdir(), and use C99 initializers.
-        - Change fs/ntfs/dir.c::ntfs_reddir() to only read/write ->f_pos once
-          at entry/exit respectively.
-        - Use C99 initializers for structures.
-        - Remove unused variable blocks from fs/ntfs/aops.c::ntfs_read_block().
-2.0.21 - Check for, and refuse to work with too large files/directories/volumes.
-        - Limit volume size at mount time to 2TiB on architectures where
-          unsigned long is 32-bits (fs/ntfs/super.c::parse_ntfs_boot_sector()).
-          This is the most we can do without overflowing the 32-bit limit of
-          the block device size imposed on us by sb_bread() and sb_getblk()
-          for the time being.
-        - Limit file/directory size at open() time to 16TiB on architectures
-          where unsigned long is 32-bits (fs/ntfs/file.c::ntfs_file_open() and
-          fs/ntfs/dir.c::ntfs_dir_open()). This is the most we can do without
-          overflowing the page cache page index.
-2.0.20 - Support non-resident directory index bitmaps, fix page leak in readdir.
-        - Move the directory index bitmap to use an attribute inode instead of
-          having special fields for it inside the ntfs inode structure. This
-          means that the index bitmaps now use the page cache for i/o, too,
-          and also as a side effect we get support for non-resident index
-          bitmaps for free.
-        - Simplify/cleanup error handling in fs/ntfs/dir.c::ntfs_readdir() and
-          fix a page leak that manifested itself in some cases.
-        - Add fs/ntfs/inode.c::ntfs_put_inode(), which we need to release the
-          index bitmap inode on the final iput().
-2.0.19 - Fix race condition, improvements, and optimizations in i/o interface.
-        - Apply block optimization added to fs/ntfs/aops.c::ntfs_read_block()
-          to fs/ntfs/compress.c::ntfs_file_read_compressed_block() as well.
-        - Drop the "file" from ntfs_file_read_compressed_block().
-        - Rename fs/ntfs/aops.c::ntfs_enb_buffer_read_async() to
-          ntfs_end_buffer_async_read() (more like the fs/buffer.c counterpart).
-        - Update ntfs_end_buffer_async_read() with the improved logic from
-          its updated counterpart fs/buffer.c::end_buffer_async_read(). Apply
-          further logic improvements to better determine when we set PageError.
-        - Update submission of buffers in fs/ntfs/aops.c::ntfs_read_block() to
-          check for the buffers being uptodate first in line with the updated
-          fs/buffer.c::block_read_full_page(). This plugs a small race
-          condition.
-2.0.18 - Fix race condition in reading of compressed files.
-        - There was a narrow window between checking a buffer head for being
-          uptodate and locking it in ntfs_file_read_compressed_block(). We now
-          lock the buffer and then check whether it is uptodate or not.
-2.0.17 - Cleanups and optimizations - shrinking the ToDo list.
-        - Modify fs/ntfs/inode.c::ntfs_read_locked_inode() to return an error
-          code and update callers, i.e. ntfs_iget(), to pass that error code
-          up instead of just using -EIO.
-        - Modifications to super.c to ensure that both mount and remount
-          cannot set any write related options when the driver is compiled
-          read-only.
-        - Optimize block resolution in fs/ntfs/aops.c::ntfs_read_block() to
-          cache the current runlist element. This should improve performance
-          when reading very large and/or very fragmented data.
-2.0.16 - Convert access to $MFT/$BITMAP to attribute inode API.
-        - Fix a stupid bug introduced in 2.0.15 where we were unmapping the
-          wrong inode in fs/ntfs/inode.c::ntfs_attr_iget().
-        - Fix debugging check in fs/ntfs/aops.c::ntfs_read_block().
-        - Convert $MFT/$BITMAP access to attribute inode API and remove all
-          remnants of the ugly mftbmp address space and operations hack. This
-          means we finally have only one readpage function as well as only one
-          async io completion handler. Yey! The mft bitmap is now just an
-          attribute inode and is accessed from vol->mftbmp_ino just as if it
-          were a normal file. Fake inodes rule. (-:
-2.0.15 - Fake inodes based attribute i/o via the pagecache, fixes and cleanups.
-        - Fix silly bug in fs/ntfs/super.c::parse_options() which was causing
-          remounts to fail when the partition had an entry in /etc/fstab and
-          the entry specified the nls= option.
-        - Apply same macro magic used in fs/ntfs/inode.h to fs/ntfs/volume.h to
-          expand all the helper functions NVolFoo(), NVolSetFoo(), and
-          NVolClearFoo().
-        - Move copyright statement from driver initialisation message to
-          module description (fs/super.c). This makes the initialisation
-          message fit on one line and fits in better with rest of kernel.
-        - Update fs/ntfs/attrib.c::map_run_list() to work on both real and
-          attribute inodes, and both for files and directories.
-        - Implement fake attribute inodes allowing all attribute i/o to go via
-          the page cache and to use all the normal vfs/mm functionality:
-          - Add ntfs_attr_iget() and its helper ntfs_read_locked_attr_inode()
-            to fs/ntfs/inode.c.
-          - Add needed cleanup code to ntfs_clear_big_inode().
-        - Merge address space operations for files and directories (aops.c),
-          now just have ntfs_aops:
-          - Rename:
-                end_buffer_read_attr_async() -> ntfs_end_buffer_read_async(),
-                ntfs_attr_read_block()       -> ntfs_read_block(),
-                ntfs_file_read_page()        -> ntfs_readpage().
-          - Rewrite fs/ntfs/aops.c::ntfs_readpage() to work on both real and
-            attribute inodes, and both for files and directories.
-          - Remove obsolete fs/ntfs/aops.c::ntfs_mst_readpage().
-2.0.14 - Run list merging code cleanup, minor locking changes, typo fixes.
-        - Change fs/ntfs/super.c::ntfs_statfs() to not rely on BKL by moving
-          the locking out of super.c::get_nr_free_mft_records() and taking and
-          dropping the mftbmp_lock rw_semaphore in ntfs_statfs() itself.
-        - Bring attribute runlist merging code (fs/ntfs/attrib.c) in sync with
-          current userspace ntfs library code. This means that if a merge
-          fails the original runlists are always left unmodified instead of
-          being silently corrupted.
-        - Misc typo fixes.
-2.0.13 - Use iget5_locked() in preparation for fake inodes and small cleanups.
-        - Remove nr_mft_bits and the now superfluous union with nr_mft_records
-          from ntfs_volume structure.
-        - Remove nr_lcn_bits and the now superfluous union with nr_clusters
-          from ntfs_volume structure.
-        - Use iget5_locked() and friends instead of conventional iget(). Wrap
-          the call in fs/ntfs/inode.c::ntfs_iget() and update callers of iget()
-          to use ntfs_iget(). Leave only one iget() call at mount time so we
-          don't need an ntfs_iget_mount().
-        - Change fs/ntfs/inode.c::ntfs_new_extent_inode() to take mft_no as an
-          additional argument.
-2.0.12 - Initial cleanup of address space operations following 2.0.11 changes.
-        - Merge fs/ntfs/aops.c::end_buffer_read_mst_async() and
-          fs/ntfs/aops.c::end_buffer_read_file_async() into one function
-          fs/ntfs/aops.c::end_buffer_read_attr_async() using NInoMstProtected()
-          to determine whether to apply mst fixups or not.
-        - Above change allows merging fs/ntfs/aops.c::ntfs_file_read_block()
-          and fs/ntfs/aops.c::ntfs_mst_readpage() into one function
-          fs/ntfs/aops.c::ntfs_attr_read_block(). Also, create a tiny wrapper
-          fs/ntfs/aops.c::ntfs_mst_readpage() to transform the parameters from
-          the VFS readpage function prototype to the ntfs_attr_read_block()
-          function prototype.
-2.0.11 - Initial preparations for fake inode based attribute i/o.
-        - Move definition of ntfs_inode_state_bits to fs/ntfs/inode.h and
-          do some macro magic (adapted from include/linux/buffer_head.h) to
-          expand all the helper functions NInoFoo(), NInoSetFoo(), and
-          NInoClearFoo().
-        - Add new flag to ntfs_inode_state_bits: NI_Sparse.
-        - Add new fields to ntfs_inode structure to allow use of fake inodes
-          for attribute i/o: type, name, name_len. Also add new state bits:
-          NI_Attr, which, if set, indicates the inode is a fake inode, and
-          NI_MstProtected, which, if set, indicates the attribute uses multi
-          sector transfer protection, i.e. fixups need to be applied after
-          reads and before/after writes.
-        - Rename fs/ntfs/inode.c::ntfs_{new,clear,destroy}_inode() to
-          ntfs_{new,clear,destroy}_extent_inode() and update callers.
-        - Use ntfs_clear_extent_inode() in fs/ntfs/inode.c::__ntfs_clear_inode()
-          instead of ntfs_destroy_extent_inode().
-        - Cleanup memory deallocations in {__,}ntfs_clear_{,big_}inode().
-        - Make all operations on ntfs inode state bits use the NIno* functions.
-        - Set up the new ntfs inode fields and state bits in
-          fs/ntfs/inode.c::ntfs_read_inode() and add appropriate cleanup of
-          allocated memory to __ntfs_clear_inode().
-        - Cleanup ntfs_inode structure a bit for better ordering of elements
-          w.r.t. their size to allow better packing of the structure in memory.
-2.0.10 - There can only be 2^32 - 1 inodes on an NTFS volume.
-        - Add check at mount time to verify that the number of inodes on the
-          volume does not exceed 2^32 - 1, which is the maximum allowed for
-          NTFS according to Microsoft.
-        - Change mft_no member of ntfs_inode structure to be unsigned long.
-          Update all users. This makes ntfs_inode->mft_no just a copy of struct
-          inode->i_ino. But we can't just always use struct inode->i_ino and
-          remove mft_no because extent inodes do not have an attached struct
-          inode.
-2.0.9 - Decompression engine now uses a single buffer and other cleanups.
-        - Change decompression engine to use a single buffer protected by a
-          spin lock instead of per-CPU buffers. (Rusty Russell)
-        - Do not update cb_pos when handling a partial final page during
-          decompression of a sparse compression block, as the value is later
-          reset without being read/used. (Rusty Russell)
-        - Switch to using the new KM_BIO_SRC_IRQ for atomic kmap()s. (Andrew
-          Morton)
-        - Change buffer size in ntfs_readdir()/ntfs_filldir() to use
-          NLS_MAX_CHARSET_SIZE which makes the buffers almost 1kiB each but
-          it also makes everything safer so it is a good thing.
-        - Miscellaneous minor cleanups to comments.
-2.0.8 - Major updates for handling of case sensitivity and dcache aliasing.
-        Big thanks go to Al Viro and other inhabitants of #kernel for investing
-        their time to discuss the case sensitivity and dcache aliasing issues.
-        - Remove unused source file fs/ntfs/attraops.c.
-        - Remove show_inodes mount option(s), thus dropping support for
-          displaying of short file names.
-        - Remove deprecated mount option posix.
-        - Restore show_sys_files mount option.
-        - Add new mount option case_sensitive, to determine if the driver
-          treats file names as case sensitive or not. If case sensitive, create
-          file names in the POSIX namespace. Otherwise create file names in the
-          LONG/WIN32 namespace. Note, files remain accessible via their short
-          file name, if it exists.
-        - Remove really dumb logic bug in boot sector recovery code.
-        - Fix dcache aliasing issues wrt short/long file names via changes
-          to fs/ntfs/dir.c::ntfs_lookup_inode_by_name() and
-          fs/ntfs/namei.c::ntfs_lookup():
-          - Add additional argument to ntfs_lookup_inode_by_name() in which we
-            return information about the matching file name if the case is not
-            matching or the match is a short file name. See comments above the
-            function definition for details.
-          - Change ntfs_lookup() to only create dcache entries for the correctly
-            cased file name and only for the WIN32 namespace counterpart of DOS
-            namespace file names. This ensures we have only one dentry per
-            directory and also removes all dcache aliasing issues between short
-            and long file names once we add write support. See comments above
-            function for details.
-        - Fix potential 1 byte overflow in fs/ntfs/unistr.c::ntfs_ucstonls().
-2.0.7 - Minor cleanups and updates for changes in core kernel code.
-        - Remove much of the NULL struct element initializers.
-        - Various updates to make compatible with recent kernels.
-        - Remove defines of MAX_BUF_PER_PAGE and include linux/buffer_head.h
-          in fs/ntfs/ntfs.h instead.
-        - Remove no longer needed KERNEL_VERSION checks. We are now in the
-          kernel proper so they are no longer needed.
-2.0.6 - Major bugfix to make compatible with other kernel changes.
-        - Initialize the mftbmp address space properly now that there are more
-          fields in the struct address_space. This was leading to hangs and
-          oopses on umount since 2.5.12 because of changes to other parts of
-          the kernel. We probably want a kernel generic init_address_space()
-          function...
-        - Drop BKL from ntfs_readdir() after consultation with Al Viro. The
-          only caller of ->readdir() is vfs_readdir() which holds i_mutex
-          during the call, and i_mutex is sufficient protection against changes
-          in the directory inode (including ->i_size).
-        - Use generic_file_llseek() for directories (as opposed to
-          default_llseek()) as this downs i_mutex instead of the BKL which is
-          what we now need for exclusion against ->f_pos changes considering we
-          no longer take the BKL in ntfs_readdir().
-2.0.5 - Major bugfix. Buffer overflow in extent inode handling.
-        - No need to set old blocksize in super.c::ntfs_fill_super() as the
-          VFS does so via invocation of deactivate_super() calling
-          fs->fill_super() calling block_kill_super() which does it.
-        - BKL moved from VFS into dir.c::ntfs_readdir(). (Linus Torvalds)
-          -> Do we really need it? I don't think so as we have exclusion on
-          the directory ntfs_inode rw_semaphore mrec_lock. We mmight have to
-          move the ->f_pos accesses under the mrec_lock though. Check this...
-        - Fix really, really, really stupid buffer overflow in extent inode
-          handling in mft.c::map_extent_mft_record().
-2.0.4 - Cleanups and updates for kernel 2.5.11.
-        - Add documentation on how to use the MD driver to be able to use NTFS
-          stripe and volume sets in Linux and generally cleanup documentation
-          a bit.
-        Remove all uses of kdev_t in favour of struct block_device *:
-        - Change compress.c::ntfs_file_read_compressed_block() to use
-          sb_getblk() instead of getblk().
-        - Change super.c::ntfs_fill_super() to use bdev_hardsect_size() instead
-          of get_hardsect_size().
-        - No need to get old blocksize in super.c::ntfs_fill_super() as
-          fs/super.c::get_sb_bdev() already does this.
-        - Set bh->b_bdev instead of bh->b_dev throughout aops.c.
-2.0.3 - Small bug fixes, cleanups, and performance improvements.
-        - Remove some dead code from mft.c.
-        - Optimize readpage and read_block functions throughout aops.c so that
-          only initialized blocks are read. Non-initialized ones have their
-          buffer head mapped, zeroed, and set up to date, without scheduling
-          any i/o. Thanks to Al Viro for advice on how to avoid the device i/o.
-        Thanks go to Andrew Morton for spotting the below:
-        - Fix buglet in allocate_compression_buffers() error code path.
-        - Call flush_dcache_page() after modifying page cache page contents in
-          ntfs_file_readpage().
-        - Check for existence of page buffers throughout aops.c before calling
-          create_empty_buffers(). This happens when an I/O error occurs and the
-          read is retried. (It also happens once writing is implemented so that
-          needed doing anyway but I had left it for later...)
-        - Don't BUG_ON() uptodate and/or mapped buffers throughout aops.c in
-          readpage and read_block functions. Reasoning same as above (i.e. I/O
-          error retries and future write code paths.)
-2.0.2 - Minor updates and cleanups.
-        - Cleanup: rename mst.c::__post_read_mst_fixup to post_write_mst_fixup
-          and cleanup the code a bit, removing the unused size parameter.
-        - Change default fmask to 0177 and update documentation.
-        - Change attrib.c::get_attr_search_ctx() to return the search context
-          directly instead of taking the address of a pointer. A return value
-          of NULL means the allocation failed. Updated all callers
-          appropriately.
-        - Update to 2.5.9 kernel (preserving backwards compatibility) by
-          replacing all occurences of page->buffers with page_buffers(page).
-        - Fix minor bugs in runlist merging, also minor cleanup.
-        - Updates to bootsector layout and mft mirror contents descriptions.
-        - Small bug fix in error detection in unistr.c and some cleanups.
-        - Grow name buffer allocations in unistr.c in aligned mutlipled of 64
-          bytes.
-2.0.1 - Minor updates.
-        - Make default umask correspond to documentation.
-        - Improve documentation.
-        - Set default mode to include execute bit. The {u,f,d}mask can be used
-          to take it away if desired. This allows binaries to be executed from
-          a mounted ntfs partition.
-2.0.0 - New version number. Remove TNG from the name. Now in the kernel.
-        - Add kill_super, just keeping up with the vfs changes in the kernel.
-        - Repeat some changes from tng-0.0.8 that somehow got lost on the way
-          from the CVS import into BitKeeper.
-        - Begin to implement proper handling of allocated_size vs
-          initialized_size vs data_size (i.e. i_size). Done are
-          mft.c::ntfs_mft_readpage(), aops.c::end_buffer_read_index_async(),
-          and attrib.c::load_attribute_list().
-        - Lock the runlist in attrib.c::load_attribute_list() while using it.
-        - Fix memory leak in ntfs_file_read_compressed_block() and generally
-          clean up compress.c a little, removing some uncommented/unused debug
-          code.
-        - Tidy up dir.c a little bit.
-        - Don't bother getting the runlist in inode.c::ntfs_read_inode().
-        - Merge mft.c::ntfs_mft_readpage() and aops.c::ntfs_index_readpage()
-          creating aops.c::ntfs_mst_readpage(), improving the handling of
-          holes and overflow in the process and implementing the correct
-          equivalent of ntfs_file_get_block() in ntfs_mst_readpage() itself.
-          I am aiming for correctness at the moment. Modularisation can come
-          later.
-        - Rename aops.c::end_buffer_read_index_async() to
-          end_buffer_read_mst_async() and optimize the overflow checking and
-          handling.
-        - Use the host of the mftbmp address space mapping to hold the ntfs
-          volume. This is needed so the async i/o completion handler can
-          retrieve a pointer to the volume. Hopefully this will not cause
-          problems elsewhere in the kernel... Otherwise will need to use a
-          fake inode.
-        - Complete implementation of proper handling of allocated_size vs
-          initialized_size vs data_size (i.e. i_size) in whole driver.
-          Basically aops.c is now completely rewritten.
-        - Change NTFS driver name to just NTFS and set version number to 2.0.0
-          to make a clear distinction from the old driver which is still on
-          version 1.1.22.
-tng-0.0.8 - 08/03/2002 - Now using BitKeeper, http://linux-ntfs.bkbits.net/
-        - Replace bdevname(sb->s_dev) with sb->s_id.
-        - Remove now superfluous new-line characters in all callers of
-          ntfs_debug().
-        - Apply kludge in ntfs_read_inode(), setting i_nlink to 1 for
-          directories. Without this the "find" utility gets very upset which is
-          fair enough as Linux/Unix do not support directory hard links.
-        - Further runlist merging work. (Richard Russon)
-        - Backwards compatibility for gcc-2.95. (Richard Russon)
-        - Update to kernel 2.5.5-pre1 and rediff the now tiny patch.
-        - Convert to new filesystem declaration using ->ntfs_get_sb() and
-          replacing ntfs_read_super() with ntfs_fill_super().
-        - Set s_maxbytes to MAX_LFS_FILESIZE to avoid page cache page index
-          overflow on 32-bit architectures.
-        - Cleanup upcase loading code to use ntfs_(un)map_page().
-        - Disable/reenable preemtion in critical sections of compession engine.
-        - Replace device size determination in ntfs_fill_super() with
-          sb->s_bdev->bd_inode->i_size (in bytes) and remove now superfluous
-          function super.c::get_nr_blocks().
-        - Implement a mount time option (show_inodes) allowing choice of which
-          types of inode names readdir() returns and modify ntfs_filldir()
-          accordingly. There are several parameters to show_inodes:
-                system: system files
-                win32:  long file names (including POSIX file names) [DEFAULT]
-                long:   same as win32
-                dos:    short file names only (excluding POSIX file names)
-                short:  same as dos
-                posix:  same as both win32 and dos
-                all:    all file names
-          Note that the options are additive, i.e. specifying:
-                -o show_inodes=system,show_inodes=win32,show_inodes=dos
-          is the same as specifying:
-                -o show_inodes=all
-          Note that the "posix" and "all" options will show all directory
-          names, BUT the link count on each directory inode entry is set to 1,
-          due to Linux not supporting directory hard links. This may well
-          confuse some userspace applications, since the directory names will
-          have the same inode numbers. Thus it is NOT advisable to use the
-          "posix" or "all" options. We provide them only for completeness sake.
-        - Add copies of allocated_size, initialized_size, and compressed_size to
-          the ntfs inode structure and set them up in
-          inode.c::ntfs_read_inode(). These reflect the unnamed data attribute
-          for files and the index allocation attribute for directories.
-        - Add copies of allocated_size and initialized_size to ntfs inode for
-          $BITMAP attribute of large directories and set them up in
-          inode.c::ntfs_read_inode().
-        - Add copies of allocated_size and initialized_size to ntfs volume for
-          $BITMAP attribute of $MFT and set them up in
-          super.c::load_system_files().
-        - Parse deprecated ntfs driver options (iocharset, show_sys_files,
-          posix, and utf8) and tell user what the new options to use are. Note
-          we still do support them but they will be removed with kernel 2.7.x.
-        - Change all occurences of integer long long printf formatting to hex
-          as printk() will not support long long integer format if/when the
-          div64 patch goes into the kernel.
-        - Make slab caches have stable names and change the names to what they
-          were intended to be. These changes are required/made possible by the
-          new slab cache name handling which removes the length limitation by
-          requiring the caller of kmem_cache_create() to supply a stable name
-          which is then referenced but not copied.
-        - Rename run_list structure to run_list_element and create a new
-          run_list structure containing a pointer to a run_list_element
-          structure and a read/write semaphore. Adapt all users of runlists
-          to new scheme and take and release the lock as needed. This fixes a
-          nasty race as the run_list changes even when inodes are locked for
-          reading and even when the inode isn't locked at all, so we really
-          needed the serialization. We use a semaphore rather than a spinlock
-          as memory allocations can sleep and doing everything GFP_ATOMIC
-          would be silly.
-        - Cleanup read_inode() removing all code checking for lowest_vcn != 0.
-          This can never happen due to the nature of lookup_attr() and how we
-          support attribute lists. If it did happen it would imply the inode
-          being corrupt.
-        - Check for lowest_vcn != 0 in ntfs_read_inode() and mark the inode as
-          bad if found.
-        - Update to 2.5.6-pre2 changes in struct address_space.
-        - Use parent_ino() when accessing d_parent inode number in dir.c.
-        - Import Sourceforge CVS repository into BitKeeper repository:
-                http://linux-ntfs.bkbits.net/ntfs-tng-2.5
-        - Update fs/Makefile, fs/Config.help, fs/Config.in, and
-          Documentation/filesystems/ntfs.txt for NTFS TNG.
-        - Create kernel configuration option controlling whether debugging
-          is enabled or not.
-        - Add the required export of end_buffer_io_sync() from the patches
-          directory to the kernel code.
-        - Update inode.c::ntfs_show_options() with show_inodes mount option.
-        - Update errors mount option.
-tng-0.0.7 - 13/02/2002 - The driver is now feature complete for read-only!
-        - Cleanup mft.c and it's debug/error output in particular. Fix a minor
-          bug in mapping of extent inodes. Update all the comments to fit all
-          the recent code changes.
-        - Modify vcn_to_lcn() to cope with entirely unmapped runlists.
-        - Cleanups in compress.c, mostly comments and folding help.
-        - Implement attrib.c::map_run_list() as a generic helper.
-        - Make compress.c::ntfs_file_read_compressed_block() use map_run_list()
-          thus making code shorter and enabling attribute list support.
-        - Cleanup incorrect use of [su]64 with %L printf format specifier in
-          all source files. Type casts to [unsigned] long long added to correct
-          the mismatches (important for architectures which have long long not
-          being 64 bits).
-        - Merge async io completion handlers for directory indexes and $MFT
-          data into one by setting the index_block_size{_bits} of the ntfs
-          inode for $MFT to the mft_record_size{_bits} of the ntfs_volume.
-        - Cleanup aops.c, update comments.
-        - Make ntfs_file_get_block() use map_run_list() so all files now
-          support attribute lists.
-        - Make ntfs_dir_readpage() almost verbatim copy of
-          block_read_full_page() by using ntfs_file_get_block() with only real
-          difference being the use of our own async io completion handler
-          rather than the default one, thus reducing the amount of code and
-          automatically enabling attribute list support for directory indices.
-        - Fix bug in load_attribute_list() - forgot to call brelse in error
-          code path.
-        - Change parameters to find_attr() and lookup_attr(). We no longer
-          pass in the upcase table and its length. These can be gotten from
-          ctx->ntfs_ino->vol->upcase{_len}. Update all callers.
-        - Cleanups in attrib.c.
-        - Implement merging of runlists, attrib.c::merge_run_lists() and its
-          helpers. (Richard Russon)
-        - Attribute lists part 2, attribute extents and multi part runlists:
-          enable proper support for LCN_RL_NOT_MAPPED and automatic mapping of
-          further runlist parts via attrib.c::map_run_list().
-        - Tiny endianness bug fix in decompress_mapping_pairs().
-tng-0.0.6 - Encrypted directories, bug fixes, cleanups, debugging enhancements.
-        - Enable encrypted directories. (Their index root is marked encrypted
-          to indicate that new files in that directory should be created
-          encrypted.)
-        - Fix bug in NInoBmpNonResident() macro. (Cut and paste error.)
-        - Enable $Extend system directory. Most (if not all) extended system
-          files do not have unnamed data attributes so ntfs_read_inode() had to
-          special case them but that is ok, as the special casing recovery
-          happens inside an error code path so there is zero slow down in the
-          normal fast path. The special casing is done by introducing a new
-          function inode.c::ntfs_is_extended_system_file() which checks if any
-          of the hard links in the inode point to $Extend as being their parent
-          directory and if they do we assume this is an extended system file.
-        - Create a sysctl/proc interface to allow {dis,en}abling of debug output
-          when compiled with -DDEBUG. Default is debug messages to be disabled.
-          To enable them, one writes a non-zero value to /proc/sys/fs/ntfs-debug
-          (if /proc is enabled) or uses sysctl(2) to effect the same (if sysctl
-          interface is enabled). Inspired by old ntfs driver.
-        - Add debug_msgs insmod/kernel boot parameter to set whether debug
-          messages are {dis,en}abled. This is useful to enable debug messages
-          during ntfs initialization and is the only way to activate debugging
-          when the sysctl interface is not enabled.
-        - Cleanup debug output in various places.
-        - Remove all dollar signs ($) from the source (except comments) to
-          enable compilation on architectures whose gcc compiler does not
-          support dollar signs in the names of variables/constants. Attribute
-          types now start with AT_ instead of $ and $I30 is now just I30.
-        - Cleanup ntfs_lookup() and add consistency check of sequence numbers.
-        - Load complete runlist for $MFT/$BITMAP during mount and cleanup
-          access functions. This means we now cope with $MFT/$BITMAP being
-          spread accross several mft records.
-        - Disable modification of mft_zone_multiplier on remount. We can always
-          reenable this later on if we really want to, but we will need to make
-          sure we readjust the mft_zone size / layout accordingly.
-tng-0.0.5 - Modernize for 2.5.x and further in line-ing with Al Viro's comments.
-        - Use sb_set_blocksize() instead of set_blocksize() and verify the
-          return value.
-        - Use sb_bread() instead of bread() throughout.
-        - Add index_vcn_size{_bits} to ntfs_inode structure to store the size
-          of a directory index block vcn. Apply resulting simplifications in
-          dir.c everywhere.
-        - Fix a small bug somewhere (but forgot what it was).
-        - Change ntfs_{debug,error,warning} to enable gcc to do type checking
-          on the printf-format parameter list and fix bugs reported by gcc
-          as a result. (Richard Russon)
-        - Move inode allocation strategy to Al's new stuff but maintain the
-          divorce of ntfs_inode from struct inode. To achieve this we have two
-          separate slab caches, one for big ntfs inodes containing a struct
-          inode and pure ntfs inodes and at the same time fix some faulty
-          error code paths in ntfs_read_inode().
-        - Show mount options in proc (inode.c::ntfs_show_options()).
-tng-0.0.4 - Big changes, getting in line with Al Viro's comments.
-        - Modified (un)map_mft_record functions to be common for read and write
-          case. To specify which is which, added extra parameter at front of
-          parameter list. Pass either READ or WRITE to this, each has the
-          obvious meaning.
-        - General cleanups to allow for easier folding in vi.
-        - attrib.c::decompress_mapping_pairs() now accepts the old runlist
-          argument, and invokes attrib.c::merge_run_lists() to merge the old
-          and the new runlists.
-        - Removed attrib.c::find_first_attr().
-        - Implemented loading of attribute list and complete runlist for $MFT.
-          This means we now cope with $MFT being spread across several mft
-          records.
-        - Adapt to 2.5.2-pre9 and the changed create_empty_buffers() syntax.
-        - Adapt major/minor/kdev_t/[bk]devname stuff to new 2.5.x kernels.
-        - Make ntfs_volume be allocated via kmalloc() instead of using a slab
-          cache. There are too little ntfs_volume structures at any one time
-          to justify a private slab cache.
-        - Fix bogus kmap() use in async io completion. Now use kmap_atomic().
-          Use KM_BIO_IRQ on advice from IRC/kernel...
-        - Use ntfs_map_page() in map_mft_record() and create ->readpage method
-          for reading $MFT (ntfs_mft_readpage). In the process create dedicated
-          address space operations (ntfs_mft_aops) for $MFT inode mapping. Also
-          removed the now superfluous exports from the kernel core patch.
-        - Fix a bug where kfree() was used instead of ntfs_free().
-        - Change map_mft_record() to take ntfs_inode as argument instead of
-          vfs inode. Dito for unmap_mft_record(). Adapt all callers.
-        - Add pointer to ntfs_volume to ntfs_inode.
-        - Add mft record number and sequence number to ntfs_inode. Stop using
-          i_ino and i_generation for in-driver purposes.
-        - Implement attrib.c::merge_run_lists(). (Richard Russon)
-        - Remove use of proper inodes by extent inodes. Move i_ino and
-          i_generation to ntfs_inode to do this. Apply simplifications that
-          result and remove iget_no_wait(), etc.
-        - Pass ntfs_inode everywhere in the driver (used to be struct inode).
-        - Add reference counting in ntfs_inode for the ntfs inode itself and
-          for the mapped mft record.
-        - Extend mft record mapping so we can (un)map extent mft records (new
-          functions (un)map_extent_mft_record), and so mappings are reference
-          counted and don't have to happen twice if already mapped - just ref
-          count increases.
-        - Add -o iocharset as alias to -o nls for backwards compatibility.
-        - The latest core patch is now tiny. In fact just a single additional
-          export is necessary over the base kernel.
-tng-0.0.3 - Cleanups, enhancements, bug fixes.
-        - Work on attrib.c::decompress_mapping_pairs() to detect base extents
-          and setup the runlist appropriately using knowledge provided by the
-          sizes in the base attribute record.
-        - Balance the get_/put_attr_search_ctx() calls so we don't leak memory
-          any more.
-        - Introduce ntfs_malloc_nofs() and ntfs_free() to allocate/free a single
-          page or use vmalloc depending on the amount of memory requested.
-        - Cleanup error output. The __FUNCTION__ "(): " is now added
-          automatically. Introduced a new header file debug.h to support this
-          and also moved ntfs_debug() function into it.
-        - Make reading of compressed files more intelligent and especially get
-          rid of the vmalloc_nofs() from readpage(). This now uses per CPU
-          buffers (allocated at first mount with cluster size <= 4kiB and
-          deallocated on last umount with cluster size <= 4kiB), and
-          asynchronous io for the compressed data using a list of buffer heads.
-          Er, we use synchronous io as async io only works on whole pages
-          covered by buffers and not on individual buffer heads...
-        - Bug fix for reading compressed files with sparse compression blocks.
-tng-0.0.2 - Now handles larger/fragmented/compressed volumes/files/dirs.
-        - Fixed handling of directories when cluster size exceeds index block
-          size.
-        - Hide DOS only name space directory entries from readdir() but allow
-          them in lookup(). This should fix the problem that Linux doesn't
-          support directory hard links, while still allowing access to entries
-          via their short file name. This also has the benefit of mimicking
-          what Windows users are used to, so it is the ideal solution.
-        - Implemented sync_page everywhere so no more hangs in D state when
-          waiting for a page.
-        - Stop using bforget() in favour of brelse().
-        - Stop locking buffers unnecessarily.
-        - Implemented compressed files (inode->mapping contains uncompressed
-          data, raw compressed data is currently bread() into a vmalloc()ed
-          memory buffer).
-        - Enable compressed directories. (Their index root is marked compressed
-          to indicate that new files in that directory should be created
-          compressed.)
-        - Use vsnprintf rather than vsprintf in the ntfs_error and ntfs_warning
-          functions. (Thanks to Will Dyson for pointing this out.)
-        - Moved the ntfs_inode and ntfs_volume (the former ntfs_inode_info and
-          ntfs_sb_info) out of the common inode and super_block structures and
-          started using the generic_ip and generic_sbp pointers instead. This
-          makes ntfs entirely private with respect to the kernel tree.
-        - Detect compiler version and abort with error message if gcc less than
-          2.96 is used.
-        - Fix bug in name comparison function in unistr.c.
-        - Implement attribute lists part 1, the infrastructure: search contexts
-          and operations, find_external_attr(), lookup_attr()) and make the
-          code use the infrastructure.
-        - Fix stupid buffer overflow bug that became apparent on larger run
-          list containing attributes.
-        - Fix bugs in readdir() that became apparent on larger directories.
-        The driver is now really useful and survives the test
-                find . -type f -exec md5sum "{}" \;
-        without any error messages on a over 1GiB sized partition with >16k
-        files on it, including compressed files and directories and many files
-        and directories with attribute lists.
-tng-0.0.1 - The first useful version.
-        - Added ntfs_lookup().
-        - Added default upcase generation and handling.
-        - Added compile options to be shown on module init.
-        - Many bug fixes that were "hidden" before.
-        - Update to latest kernel.
-        - Added ntfs_readdir().
-        - Added file operations for mmap(), read(), open() and llseek(). We just
-          use the generic ones. The whole point of going through implementing
-          readpage() methods and where possible get_block() call backs is that
-          this allows us to make use of the generic high level methods provided
-          by the kernel.
-        The driver is now actually useful! Yey. (-: It undoubtedly has got bugs
-        though and it doesn't implement accesssing compressed files yet. Also,
-        accessing files with attribute list attributes is not implemented yet
-        either. But for small or simple filesystems it should work and allow
-        you to list directories, use stat on directory entries and the file
-        system, open, read, mmap and llseek around in files. A big mile stone
-        has been reached!
-tng-0.0.0 - Initial version tag.
-        Initial driver implementation. The driver can mount and umount simple
-        NTFS filesystems (i.e. ones without attribute lists in the system
-        files). If the mount fails there might be problems in the error handling
-        code paths, so be warned. Otherwise it seems to be loading the system
-        files nicely and the mft record read mapping/unmapping seems to be
-        working nicely, too. Proof of inode metadata in the page cache and non-
-        resident file unnamed stream data in the page cache concepts is thus
-        complete.
author	Jiri Kosina <jkosina@suse.cz>	2010-02-24 07:55:31 -0500
committer	Jiri Kosina <jkosina@suse.cz>	2010-02-24 07:55:31 -0500
commit	7c821a179f91c3ad52588400ce52a7fb48b9868c (patch)
tree	87a133a7e8aaa756253f82975b265a26fbffc328 /fs/ntfs
parent	a8ab0102d7f031e477dbe31450d5b69d40bea324 (diff)