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/mm.h>
  22 #include <linux/config.h>
  23 #include <linux/fs.h>
  24 #include <linux/blkdev.h>
  25 #include <asm/semaphore.h>
  26 #include <linux/major.h>
  27 #include <linux/ioctl.h>
  28 #include <linux/types.h>
  29 #include <asm/bitops.h>
  30 #include <linux/module.h>
  31 #include <linux/hdreg.h>
  32 #include <linux/sysctl.h>
  33 #include <linux/proc_fs.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/delay.h>
  36 #include <net/checksum.h>
  37 #include <linux/random.h>
  38 #include <linux/locks.h>
  39 #include <linux/kernel_stat.h>
  40 #include <asm/io.h>
  41
  42 #include <linux/raid/md_compatible.h>
  43 /*
  44  * 'md_p.h' holds the 'physical' layout of RAID devices
  45  * 'md_u.h' holds the user <=> kernel API
  46  *
  47  * 'md_k.h' holds kernel internal definitions
  48  */
  49
  50 #include <linux/raid/md_p.h>
  51 #include <linux/raid/md_u.h>
  52 #include <linux/raid/md_k.h>
  53
  54 /*
  55  * Different major versions are not compatible.
  56  * Different minor versions are only downward compatible.
  57  * Different patchlevel versions are downward and upward compatible.
  58  */
  59 #define MD_MAJOR_VERSION                0
  60 #define MD_MINOR_VERSION                90
  61 #define MD_PATCHLEVEL_VERSION           0
  62
  63 extern int md_size[MAX_MD_DEVS];
  64 extern struct hd_struct md_hd_struct[MAX_MD_DEVS];
  65
  66 extern void add_mddev_mapping (mddev_t *mddev, kdev_t dev, void *data);
  67 extern void del_mddev_mapping (mddev_t *mddev, kdev_t dev);
  68 extern char * partition_name (kdev_t dev);
  69 extern int register_md_personality (int p_num, mdk_personality_t *p);
  70 extern int unregister_md_personality (int p_num);
  71 extern mdk_thread_t * md_register_thread (void (*run) (void *data),
  72                                 void *data, const char *name);
  73 extern void md_unregister_thread (mdk_thread_t *thread);
  74 extern void md_wakeup_thread(mdk_thread_t *thread);
  75 extern void md_interrupt_thread (mdk_thread_t *thread);
  76 extern int md_update_sb (mddev_t *mddev);
  77 extern int md_do_sync(mddev_t *mddev, mdp_disk_t *spare);
  78 extern void md_done_sync(mddev_t *mddev, int blocks, int ok);
  79 extern void md_recover_arrays (void);
  80 extern int md_check_ordering (mddev_t *mddev);
  81 extern struct gendisk * find_gendisk (kdev_t dev);
  82 extern int md_notify_reboot(struct notifier_block *this,
  83                                         unsigned long code, void *x);
  84 extern int md_error (kdev_t mddev, kdev_t rdev);
  85
  86 #if CONFIG_BLK_DEV_MD
  87 extern void raid_setup(char *str,int *ints) md__init;
  88 #endif
  89
  90 extern void md_print_devices (void);
  91
  92 #define MD_BUG(x...) { printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); }
  93
  94 #endif _MD_H
  95