Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      Minor tidying.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      file operations ->write(), ->aio_write(), and ->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.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      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.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      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).
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      uncompressed and unencrypted files.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      extend the allocation of an attributes.  Optionally, the data size,
      but not the initialized size can be extended, too.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      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.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      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.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

        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().
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

        search context as argument.  This allows calling it 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().
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      search context as argument.  This allows calling it with the mft
      record mapped.  Update all callers.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      search context.  This allows calling it with the mft record mapped.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      count to become negative and hence we had a wild memset() scribbling
      all over the system's ram.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      restart pages in the journal without multi sector transfer protection
      fixups (i.e. the update sequence array is empty and in fact does not
      exist).
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      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.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      changes by Richard Russon.)
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      otherwise causes a BUG().
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      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.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      fs/ntfs/aops.c::ntfs_end_buffer_async_read() to a bit spin lock
      in the first buffer head of a page.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      fs/ntfs/aops.c::ntfs_readpage().
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      where a concurrent truncate has truncated the runlist under our feet.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      lock protection over the buffer submission for i/o which allows the
      removal of the get_bh()/put_bh() pairs for each buffer.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      fs/ntfs/aops.c::ntfs_writepage().
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      fs/ntfs/inode.c::ntfs_read_locked_{,attr_,index_}inode().
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      updating the times in the inode in ntfs_setattr().
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      importantly to take a locked runlist rather than them locking it
      which leads to lock reversal.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      Also, 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.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

- 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.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      index entry is in the index root, we forgot to set the @ir pointer in
      the index context.  Thanks for Yura Pakhuchiy for finding this bug.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      length is zero.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>

      messages and include the inode number.  Thanks to Yura Pakhuchiy for
      pointing this out.
Signed-off-by: NAnton Altaparmakov <aia21@cantab.net>