LXR linux/include/linux/raid/md.h

   1/*
   2   md.h : Multiple Devices driver for Linux
   3          Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman
   4          Copyright (C) 1994-96 Marc ZYNGIER
   5          <zyngier@ufr-info-p7.ibp.fr> or
   6          <maz@gloups.fdn.fr>
   7          
   8   This program is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2, or (at your option)
  11   any later version.
  12   
  13   You should have received a copy of the GNU General Public License
  14   (for example /usr/src/linux/COPYING); if not, write to the Free
  15   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  
  16*/
  17
  18#ifndef _MD_H
  19#define _MD_H
  20
  21#include <linux/blkdev.h>
  22#include <linux/major.h>
  23#include <linux/ioctl.h>
  24#include <linux/types.h>
  25#include <linux/bitops.h>
  26#include <linux/module.h>
  27#include <linux/hdreg.h>
  28#include <linux/proc_fs.h>
  29#include <linux/seq_file.h>
  30#include <linux/smp_lock.h>
  31#include <linux/delay.h>
  32#include <net/checksum.h>
  33#include <linux/random.h>
  34#include <linux/kernel_stat.h>
  35#include <asm/io.h>
  36#include <linux/completion.h>
  37#include <linux/mempool.h>
  38#include <linux/list.h>
  39#include <linux/reboot.h>
  40#include <linux/vmalloc.h>
  41#include <linux/blkpg.h>
  42#include <linux/bio.h>
  43
  44/*
  45 * 'md_p.h' holds the 'physical' layout of RAID devices
  46 * 'md_u.h' holds the user <=> kernel API
  47 *
  48 * 'md_k.h' holds kernel internal definitions
  49 */
  50
  51#include <linux/raid/md_p.h>
  52#include <linux/raid/md_u.h>
  53#include <linux/raid/md_k.h>
  54
  55#ifdef CONFIG_MD
  56
  57/*
  58 * Different major versions are not compatible.
  59 * Different minor versions are only downward compatible.
  60 * Different patchlevel versions are downward and upward compatible.
  61 */
  62#define MD_MAJOR_VERSION                0
  63#define MD_MINOR_VERSION                90
  64/*
  65 * MD_PATCHLEVEL_VERSION indicates kernel functionality.
  66 * >=1 means different superblock formats are selectable using SET_ARRAY_INFO
  67 *     and major_version/minor_version accordingly
  68 * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT
  69 *     in the super status byte
  70 * >=3 means that bitmap superblock version 4 is supported, which uses
  71 *     little-ending representation rather than host-endian
  72 */
  73#define MD_PATCHLEVEL_VERSION           3
  74
  75extern int mdp_major;
  76
  77extern int register_md_personality (struct mdk_personality *p);
  78extern int unregister_md_personality (struct mdk_personality *p);
  79extern mdk_thread_t * md_register_thread (void (*run) (mddev_t *mddev),
  80                                mddev_t *mddev, const char *name);
  81extern void md_unregister_thread (mdk_thread_t *thread);
  82extern void md_wakeup_thread(mdk_thread_t *thread);
  83extern void md_check_recovery(mddev_t *mddev);
  84extern void md_write_start(mddev_t *mddev, struct bio *bi);
  85extern void md_write_end(mddev_t *mddev);
  86extern void md_handle_safemode(mddev_t *mddev);
  87extern void md_done_sync(mddev_t *mddev, int blocks, int ok);
  88extern void md_error (mddev_t *mddev, mdk_rdev_t *rdev);
  89extern void md_unplug_mddev(mddev_t *mddev);
  90
  91extern void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
  92                           sector_t sector, int size, struct page *page);
  93extern void md_super_wait(mddev_t *mddev);
  94extern int sync_page_io(struct block_device *bdev, sector_t sector, int size,
  95                        struct page *page, int rw);
  96extern void md_do_sync(mddev_t *mddev);
  97extern void md_new_event(mddev_t *mddev);
  98extern void md_allow_write(mddev_t *mddev);
  99extern void md_wait_for_blocked_rdev(mdk_rdev_t *rdev, mddev_t *mddev);
 100
 101#endif /* CONFIG_MD */
 102#endif 
 103
 104