path: root/fs/ntfs/ChangeLog

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.
	- Enable the code for setting the NT4 compatibility flag when we start
	  making NTFS 1.2 specific modifications.

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