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 (at) ufr-info-p7.ibp.fr> or 6 <maz (at) 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 56 /* 57 * Different major versions are not compatible. 58 * Different minor versions are only downward compatible. 59 * Different patchlevel versions are downward and upward compatible. 60 */ 61 #define MD_MAJOR_VERSION 0 62 #define MD_MINOR_VERSION 90 63 /* 64 * MD_PATCHLEVEL_VERSION indicates kernel functionality. 65 * >=1 means different superblock formats are selectable using SET_ARRAY_INFO 66 * and major_version/minor_version accordingly 67 * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT 68 * in the super status byte 69 * >=3 means that bitmap superblock version 4 is supported, which uses 70 * little-ending representation rather than host-endian 71 */ 72 #define MD_PATCHLEVEL_VERSION 3 73 74 extern int register_md_personality (struct mdk_personality *p); 75 extern int unregister_md_personality (struct mdk_personality *p); 76 extern mdk_thread_t * md_register_thread (void (*run) (mddev_t *mddev), 77 mddev_t *mddev, const char *name); 78 extern void md_unregister_thread (mdk_thread_t *thread); 79 extern void md_wakeup_thread(mdk_thread_t *thread); 80 extern void md_check_recovery(mddev_t *mddev); 81 extern void md_write_start(mddev_t *mddev, struct bio *bi); 82 extern void md_write_end(mddev_t *mddev); 83 extern void md_handle_safemode(mddev_t *mddev); 84 extern void md_done_sync(mddev_t *mddev, int blocks, int ok); 85 extern void md_error (mddev_t *mddev, mdk_rdev_t *rdev); 86 extern void md_unplug_mddev(mddev_t *mddev); 87 88 extern void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev, 89 sector_t sector, int size, struct page *page); 90 extern void md_super_wait(mddev_t *mddev); 91 extern int sync_page_io(struct block_device *bdev, sector_t sector, int size, 92 struct page *page, int rw); 93 extern void md_do_sync(mddev_t *mddev); 94 extern void md_new_event(mddev_t *mddev); 95 96 extern void md_update_sb(mddev_t * mddev); 97 98 #endif 99 100
