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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 <asm/semaphore.h>
23#include <linux/major.h>
24#include <linux/ioctl.h>
25#include <linux/types.h>
26#include <linux/bitops.h>
27#include <linux/module.h>
28#include <linux/hdreg.h>
29#include <linux/proc_fs.h>
30#include <linux/seq_file.h>
31#include <linux/smp_lock.h>
32#include <linux/delay.h>
33#include <net/checksum.h>
34#include <linux/random.h>
35#include <linux/kernel_stat.h>
36#include <asm/io.h>
37#include <linux/completion.h>
38#include <linux/mempool.h>
39#include <linux/list.h>
40#include <linux/reboot.h>
41#include <linux/vmalloc.h>
42#include <linux/blkpg.h>
43#include <linux/bio.h>
44
45/*
46 * 'md_p.h' holds the 'physical' layout of RAID devices
47 * 'md_u.h' holds the user <=> kernel API
48 *
49 * 'md_k.h' holds kernel internal definitions
50 */
51
52#include <linux/raid/md_p.h>
53#include <linux/raid/md_u.h>
54#include <linux/raid/md_k.h>
55
David Howells93614012006-09-30 20:45:40 +020056#ifdef CONFIG_MD
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058/*
59 * Different major versions are not compatible.
60 * Different minor versions are only downward compatible.
61 * Different patchlevel versions are downward and upward compatible.
62 */
63#define MD_MAJOR_VERSION 0
64#define MD_MINOR_VERSION 90
NeilBrowna654b9d82005-06-21 17:17:27 -070065/*
66 * MD_PATCHLEVEL_VERSION indicates kernel functionality.
67 * >=1 means different superblock formats are selectable using SET_ARRAY_INFO
68 * and major_version/minor_version accordingly
69 * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT
70 * in the super status byte
NeilBrownbd926c62005-11-08 21:39:32 -080071 * >=3 means that bitmap superblock version 4 is supported, which uses
72 * little-ending representation rather than host-endian
NeilBrowna654b9d82005-06-21 17:17:27 -070073 */
NeilBrownbd926c62005-11-08 21:39:32 -080074#define MD_PATCHLEVEL_VERSION 3
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
NeilBrown2604b702006-01-06 00:20:36 -080076extern int register_md_personality (struct mdk_personality *p);
77extern int unregister_md_personality (struct mdk_personality *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078extern mdk_thread_t * md_register_thread (void (*run) (mddev_t *mddev),
79 mddev_t *mddev, const char *name);
80extern void md_unregister_thread (mdk_thread_t *thread);
81extern void md_wakeup_thread(mdk_thread_t *thread);
82extern void md_check_recovery(mddev_t *mddev);
NeilBrown3d310eb2005-06-21 17:17:26 -070083extern void md_write_start(mddev_t *mddev, struct bio *bi);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084extern void md_write_end(mddev_t *mddev);
85extern void md_handle_safemode(mddev_t *mddev);
86extern void md_done_sync(mddev_t *mddev, int blocks, int ok);
87extern void md_error (mddev_t *mddev, mdk_rdev_t *rdev);
88extern void md_unplug_mddev(mddev_t *mddev);
89
NeilBrowna654b9d82005-06-21 17:17:27 -070090extern void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
91 sector_t sector, int size, struct page *page);
NeilBrowna9701a32005-11-08 21:39:34 -080092extern void md_super_wait(mddev_t *mddev);
NeilBrowna654b9d82005-06-21 17:17:27 -070093extern int sync_page_io(struct block_device *bdev, sector_t sector, int size,
94 struct page *page, int rw);
NeilBrown29269552006-03-27 01:18:10 -080095extern void md_do_sync(mddev_t *mddev);
96extern void md_new_event(mddev_t *mddev);
NeilBrown2a2275d2007-01-26 00:57:11 -080097extern void md_allow_write(mddev_t *mddev);
NeilBrownf6705572006-03-27 01:18:11 -080098
David Howells93614012006-09-30 20:45:40 +020099#endif /* CONFIG_MD */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#endif
101