rtems-rfs-group.h

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/*
 *  COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org>
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */


#if !defined (_RTEMS_RFS_GROUP_H_)
#define _RTEMS_RFS_GROUP_H_

#include <rtems/rfs/rtems-rfs-trace.h>
#include <rtems/rfs/rtems-rfs-bitmaps.h>
#include <rtems/rfs/rtems-rfs-buffer.h>

#define RTEMS_RFS_GROUP_BLOCK_BITMAP_BLOCK (0)
#define RTEMS_RFS_GROUP_INODE_BITMAP_BLOCK (1)
#define RTEMS_RFS_GROUP_INODE_BLOCK        (2)

typedef struct _rtems_rfs_group
{
  rtems_rfs_buffer_block base;

  size_t size;

  rtems_rfs_bitmap_control block_bitmap;

  rtems_rfs_buffer_handle block_bitmap_buffer;

  rtems_rfs_bitmap_control inode_bitmap;

  rtems_rfs_buffer_handle inode_bitmap_buffer;

} rtems_rfs_group;

#define rtems_rfs_group_block(_g, _b) (((_g)->base) + (_b))

#define rtems_rfs_group_inode(_f, _g, _i) \
  (((_f)->group_inodes * (_g)) + (_i) + RTEMS_RFS_ROOT_INO)

int rtems_rfs_group_open (rtems_rfs_file_system* fs,
                          rtems_rfs_buffer_block base,
                          size_t                 size,
                          size_t                 inodes,
                          rtems_rfs_group*       group);

int rtems_rfs_group_close (rtems_rfs_file_system* fs,
                           rtems_rfs_group*       group);

int rtems_rfs_group_bitmap_alloc (rtems_rfs_file_system* fs,
                                  rtems_rfs_bitmap_bit   goal,
                                  bool                   inode,
                                  rtems_rfs_bitmap_bit*  result);

int rtems_rfs_group_bitmap_free (rtems_rfs_file_system* fs,
                                 bool                   inode,
                                 rtems_rfs_bitmap_bit   no);

int rtems_rfs_group_bitmap_test (rtems_rfs_file_system* fs,
                                 bool                   inode,
                                 rtems_rfs_bitmap_bit   no,
                                 bool*                  state);

int rtems_rfs_group_usage (rtems_rfs_file_system* fs,
                           size_t*                blocks,
                           size_t*                inodes);

#endif