changelog

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	  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 run lists
	  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 run lists.
	- 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 run lists, attrib.c::merge_run_lists() and its
	  helpers. (Richard Russon)
	- Attribute lists part 2, attribute extents and multi part run lists:
	  enable proper support for LCN_RL_NOT_MAPPED and automatic mapping of
	  further run list 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 run list 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 run list
	  argument, and invokes attrib.c::merge_run_lists() to merge the old
	  and the new run lists.
	- Removed attrib.c::find_first_attr().
	- Implemented loading of attribute list and complete run list 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 insted 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 run list 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 file systems 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 file systems (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.