1c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 2c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru md.h : Multiple Devices driver for Linux 3c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman 4c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru Copyright (C) 1994-96 Marc ZYNGIER 5c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru <zyngier@ufr-info-p7.ibp.fr> or 6c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru <maz@gloups.fdn.fr> 7c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 8c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru This program is free software; you can redistribute it and/or modify 9c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru it under the terms of the GNU General Public License as published by 10c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru the Free Software Foundation; either version 2, or (at your option) 11c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru any later version. 12c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 13c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru You should have received a copy of the GNU General Public License 14c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru (for example /usr/src/linux/COPYING); if not, write to the Free 15c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 16c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru*/ 17c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 18c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef _MD_H 19c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define _MD_H 20c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 21c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/blkdev.h> 22c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/semaphore.h> 23c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/major.h> 24c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/ioctl.h> 25c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/types.h> 26c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/bitops.h> 27c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/module.h> 28c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/hdreg.h> 29c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/proc_fs.h> 30c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/seq_file.h> 31c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/smp_lock.h> 32c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/delay.h> 33c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <net/checksum.h> 34c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/random.h> 35c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/kernel_stat.h> 36c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/io.h> 37c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/completion.h> 38c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/mempool.h> 39c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/list.h> 40c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/reboot.h> 41c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/vmalloc.h> 42c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/blkpg.h> 43c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/bio.h> 44c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 45c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 46c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 'md_p.h' holds the 'physical' layout of RAID devices 47c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 'md_u.h' holds the user <=> kernel API 48c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 49c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 'md_k.h' holds kernel internal definitions 50c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 51c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 52c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/raid/md_p.h> 53c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/raid/md_u.h> 54c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/raid/md_k.h> 55c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 56c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 57c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Different major versions are not compatible. 58c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Different minor versions are only downward compatible. 59c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Different patchlevel versions are downward and upward compatible. 60c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 61c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define MD_MAJOR_VERSION 0 62c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define MD_MINOR_VERSION 90 63c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 64c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * MD_PATCHLEVEL_VERSION indicates kernel functionality. 65c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * >=1 means different superblock formats are selectable using SET_ARRAY_INFO 66c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * and major_version/minor_version accordingly 67c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT 68c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * in the super status byte 69c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * >=3 means that bitmap superblock version 4 is supported, which uses 70c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * little-ending representation rather than host-endian 71c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 72c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define MD_PATCHLEVEL_VERSION 3 73c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 74c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern int register_md_personality (struct mdk_personality *p); 75c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern int unregister_md_personality (struct mdk_personality *p); 76c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern mdk_thread_t * md_register_thread (void (*run) (mddev_t *mddev), 77c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru mddev_t *mddev, const char *name); 78c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_unregister_thread (mdk_thread_t *thread); 79c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_wakeup_thread(mdk_thread_t *thread); 80c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_check_recovery(mddev_t *mddev); 81c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_write_start(mddev_t *mddev, struct bio *bi); 82c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_write_end(mddev_t *mddev); 83c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_handle_safemode(mddev_t *mddev); 84c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_done_sync(mddev_t *mddev, int blocks, int ok); 85c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_error (mddev_t *mddev, mdk_rdev_t *rdev); 86c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_unplug_mddev(mddev_t *mddev); 87c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 88c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev, 89c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru sector_t sector, int size, struct page *page); 90c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_super_wait(mddev_t *mddev); 91c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern int sync_page_io(struct block_device *bdev, sector_t sector, int size, 92c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct page *page, int rw); 93c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_do_sync(mddev_t *mddev); 94c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_new_event(mddev_t *mddev); 95c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 96c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void md_update_sb(mddev_t * mddev); 97c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 98c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 99c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 100