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Diffstat (limited to 'isys')
| -rw-r--r-- | isys/md-int.h | 290 |
1 files changed, 0 insertions, 290 deletions
diff --git a/isys/md-int.h b/isys/md-int.h deleted file mode 100644 index 358f485dd..000000000 --- a/isys/md-int.h +++ /dev/null @@ -1,290 +0,0 @@ -/* - md.h : Multiple Devices driver for Linux - Copyright (C) 1994-96 Marc ZYNGIER - <zyngier@ufr-info-p7.ibp.fr> or - <maz@gloups.fdn.fr> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - You should have received a copy of the GNU General Public License - (for example /usr/src/linux/COPYING); if not, write to the Free - Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#ifndef MD_INT_H -#define MD_INT_H - -/* don't include the kernel RAID header! */ -#define _MD_H - -typedef unsigned int md_u32; -typedef unsigned short md_u16; -typedef unsigned char md_u8; - -#include <linux/major.h> -#include <sys/ioctl.h> - -/* - * Different major versions are not compatible. - * Different minor versions are only downward compatible. - * Different patchlevel versions are downward and upward compatible. - */ - -struct md_version { - int major; - int minor; - int patchlevel; -}; - -/* - * default readahead - */ -#define MD_READAHEAD (256 * 1024) - -/* These are the ioctls for md versions < 0.50 */ -#define REGISTER_MD_DEV _IO (MD_MAJOR, 1) -#define START_MD _IO (MD_MAJOR, 2) -#define STOP_MD _IO (MD_MAJOR, 3) - -/* status */ -#define RAID_VERSION _IOR (MD_MAJOR, 0x10, struct md_version) -#define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, md_array_info_t) -#define GET_DISK_INFO _IOR (MD_MAJOR, 0x12, md_disk_info_t) -#define PRINT_RAID_DEBUG _IO (MD_MAJOR, 0x13) - -/* configuration */ -#define CLEAR_ARRAY _IO (MD_MAJOR, 0x20) -#define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, md_disk_info_t) -#define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22) -#define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, md_array_info_t) -#define SET_DISK_INFO _IO (MD_MAJOR, 0x24) -#define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25) -#define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26) -#define PROTECT_ARRAY _IO (MD_MAJOR, 0x27) -#define HOT_ADD_DISK _IO (MD_MAJOR, 0x28) - -/* usage */ -#define RUN_ARRAY _IOW (MD_MAJOR, 0x30, struct md_param) -#define START_ARRAY _IO (MD_MAJOR, 0x31) -#define STOP_ARRAY _IO (MD_MAJOR, 0x32) -#define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33) -#define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34) - - -/* for raid < 0.50 only */ -#define MD_PERSONALITY_SHIFT 16 - -#define MD_RESERVED 0UL -#define LINEAR 1UL -#define STRIPED 2UL -#define RAID0 STRIPED -#define RAID1 3UL -#define RAID5 4UL -#define TRANSLUCENT 5UL -#define LVM 6UL -#define MAX_PERSONALITY 7UL - -/* - * MD superblock. - * - * The MD superblock maintains some statistics on each MD configuration. - * Each real device in the MD set contains it near the end of the device. - * Some of the ideas are copied from the ext2fs implementation. - * - * We currently use 4096 bytes as follows: - * - * word offset function - * - * 0 - 31 Constant generic MD device information. - * 32 - 63 Generic state information. - * 64 - 127 Personality specific information. - * 128 - 511 12 32-words descriptors of the disks in the raid set. - * 512 - 911 Reserved. - * 912 - 1023 Disk specific descriptor. - */ - -/* - * If x is the real device size in bytes, we return an apparent size of: - * - * y = (x & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES - * - * and place the 4kB superblock at offset y. - */ -#define MD_RESERVED_BYTES (64 * 1024) -#define MD_RESERVED_SECTORS (MD_RESERVED_BYTES / 512) -#define MD_RESERVED_BLOCKS (MD_RESERVED_BYTES / BLOCK_SIZE) - -#define MD_NEW_SIZE_SECTORS(x) ((x & ~(MD_RESERVED_SECTORS - 1)) - MD_RESERVED_SECTORS) -#define MD_NEW_SIZE_BLOCKS(x) ((x & ~(MD_RESERVED_BLOCKS - 1)) - MD_RESERVED_BLOCKS) - -#define MD_SB_BYTES 4096 -#define MD_SB_WORDS (MD_SB_BYTES / 4) -#define MD_SB_BLOCKS (MD_SB_BYTES / BLOCK_SIZE) -#define MD_SB_SECTORS (MD_SB_BYTES / 512) - -/* - * The following are counted in 32-bit words - */ -#define MD_SB_GENERIC_OFFSET 0 -#define MD_SB_PERSONALITY_OFFSET 64 -#define MD_SB_DISKS_OFFSET 128 -#define MD_SB_DESCRIPTOR_OFFSET 992 - -#define MD_SB_GENERIC_CONSTANT_WORDS 32 -#define MD_SB_GENERIC_STATE_WORDS 32 -#define MD_SB_GENERIC_WORDS (MD_SB_GENERIC_CONSTANT_WORDS + MD_SB_GENERIC_STATE_WORDS) -#define MD_SB_PERSONALITY_WORDS 64 -#define MD_SB_DISKS_WORDS 384 -#define MD_SB_DESCRIPTOR_WORDS 32 -#define MD_SB_RESERVED_WORDS (1024 - MD_SB_GENERIC_WORDS - MD_SB_PERSONALITY_WORDS - MD_SB_DISKS_WORDS - MD_SB_DESCRIPTOR_WORDS) -#define MD_SB_EQUAL_WORDS (MD_SB_GENERIC_WORDS + MD_SB_PERSONALITY_WORDS + MD_SB_DISKS_WORDS) -#define MD_SB_DISKS (MD_SB_DISKS_WORDS / MD_SB_DESCRIPTOR_WORDS) - -/* - * Device "operational" state bits - */ -#define MD_DISK_FAULTY 0 /* disk is faulty / operational */ -#define MD_DISK_ACTIVE 1 /* disk is running or spare disk */ -#define MD_DISK_SYNC 2 /* disk is in sync with the raid set */ - -typedef struct md_device_descriptor_s { - md_u32 number; /* 0 Device number in the entire set */ - md_u32 major; /* 1 Device major number */ - md_u32 minor; /* 2 Device minor number */ - md_u32 raid_disk; /* 3 The role of the device in the raid set */ - md_u32 state; /* 4 Operational state */ - md_u32 reserved[MD_SB_DESCRIPTOR_WORDS - 5]; -} md_descriptor_t; - -#define MD_SB_MAGIC 0xa92b4efc - -/* - * Superblock state bits - */ -#define MD_SB_CLEAN 0 -#define MD_SB_ERRORS 1 - -typedef struct md_superblock_s { - /* - * Constant generic information - */ - md_u32 md_magic; /* 0 MD identifier */ - md_u32 major_version; /* 1 major version to which the set conforms */ - md_u32 minor_version; /* 2 minor version ... */ - md_u32 patch_version; /* 3 patchlevel version ... */ - md_u32 gvalid_words; /* 4 Number of used words in this section */ - md_u32 set_magic; /* 5 Raid set identifier */ - md_u32 ctime; /* 6 Creation time */ - md_u32 level; /* 7 Raid personality */ - md_u32 size; /* 8 Apparent size of each individual disk */ - md_u32 nr_disks; /* 9 total disks in the raid set */ - md_u32 raid_disks; /* 10 disks in a fully functional raid set */ - md_u32 md_minor; /* 11 preferred MD minor device number */ - md_u32 gstate_creserved[MD_SB_GENERIC_CONSTANT_WORDS - 12]; - - /* - * Generic state information - */ - md_u32 utime; /* 0 Superblock update time */ - md_u32 state; /* 1 State bits (clean, ...) */ - md_u32 active_disks; /* 2 Number of currently active disks */ - md_u32 working_disks; /* 3 Number of working disks */ - md_u32 failed_disks; /* 4 Number of failed disks */ - md_u32 spare_disks; /* 5 Number of spare disks */ - md_u32 gstate_sreserved[MD_SB_GENERIC_STATE_WORDS - 6]; - - /* - * Personality information - */ - md_u32 layout; /* 0 the array's physical layout */ - md_u32 chunk_size; /* 1 chunk size in bytes */ - md_u32 pstate_reserved[MD_SB_PERSONALITY_WORDS - 2]; - - /* - * Disks information - */ - md_descriptor_t disks[MD_SB_DISKS]; - - /* - * Reserved - */ - md_u32 reserved[MD_SB_RESERVED_WORDS]; - - /* - * Active descriptor - */ - md_descriptor_t descriptor; - -} md_superblock_t; - -/* - * options passed in raidstart: - */ - -#define MAX_CHUNK_SIZE (4096*1024) - -struct md_param -{ - int personality; /* 1,2,3,4 */ - int chunk_size; /* in bytes */ - int max_fault; /* unused for now */ -}; - -typedef struct md_array_info_s { - /* - * Generic constant information - */ - md_u32 major_version; - md_u32 minor_version; - md_u32 patch_version; - md_u32 ctime; - md_u32 level; - md_u32 size; - md_u32 nr_disks; - md_u32 raid_disks; - md_u32 md_minor; - md_u32 not_persistent; - - /* - * Generic state information - */ - md_u32 utime; /* 0 Superblock update time */ - md_u32 state; /* 1 State bits (clean, ...) */ - md_u32 active_disks; /* 2 Number of currently active disks */ - md_u32 working_disks; /* 3 Number of working disks */ - md_u32 failed_disks; /* 4 Number of failed disks */ - md_u32 spare_disks; /* 5 Number of spare disks */ - - /* - * Personality information - */ - md_u32 layout; /* 0 the array's physical layout */ - md_u32 chunk_size; /* 1 chunk size in bytes */ - -} md_array_info_t; - -typedef struct md_disk_info_s { - /* - * configuration/status of one particular disk - */ - md_u32 number; - md_u32 major; - md_u32 minor; - md_u32 raid_disk; - md_u32 state; - -} md_disk_info_t; - - -/* - * Supported RAID5 algorithms - */ -#define RAID5_ALGORITHM_LEFT_ASYMMETRIC 0 -#define RAID5_ALGORITHM_RIGHT_ASYMMETRIC 1 -#define RAID5_ALGORITHM_LEFT_SYMMETRIC 2 -#define RAID5_ALGORITHM_RIGHT_SYMMETRIC 3 - -#endif /* _MD_H */ |