| /* |
| md_u.h : user <=> kernel API between Linux raidtools and RAID drivers |
| Copyright (C) 1998 Ingo Molnar |
| |
| 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_U_H |
| #define _MD_U_H |
| |
| /* |
| * Different major versions are not compatible. |
| * Different minor versions are only downward compatible. |
| * Different patchlevel versions are downward and upward compatible. |
| */ |
| #define MD_MAJOR_VERSION 0 |
| #define MD_MINOR_VERSION 90 |
| /* |
| * MD_PATCHLEVEL_VERSION indicates kernel functionality. |
| * >=1 means different superblock formats are selectable using SET_ARRAY_INFO |
| * and major_version/minor_version accordingly |
| * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT |
| * in the super status byte |
| * >=3 means that bitmap superblock version 4 is supported, which uses |
| * little-ending representation rather than host-endian |
| */ |
| #define MD_PATCHLEVEL_VERSION 3 |
| |
| /* ioctls */ |
| |
| /* status */ |
| #define RAID_VERSION _IOR (MD_MAJOR, 0x10, mdu_version_t) |
| #define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, mdu_array_info_t) |
| #define GET_DISK_INFO _IOR (MD_MAJOR, 0x12, mdu_disk_info_t) |
| #define PRINT_RAID_DEBUG _IO (MD_MAJOR, 0x13) |
| #define RAID_AUTORUN _IO (MD_MAJOR, 0x14) |
| #define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t) |
| |
| /* configuration */ |
| #define CLEAR_ARRAY _IO (MD_MAJOR, 0x20) |
| #define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, mdu_disk_info_t) |
| #define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22) |
| #define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, mdu_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) |
| #define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29) |
| #define HOT_GENERATE_ERROR _IO (MD_MAJOR, 0x2a) |
| #define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int) |
| |
| /* usage */ |
| #define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t) |
| /* 0x31 was START_ARRAY */ |
| #define STOP_ARRAY _IO (MD_MAJOR, 0x32) |
| #define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33) |
| #define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34) |
| |
| /* 63 partitions with the alternate major number (mdp) */ |
| #define MdpMinorShift 6 |
| |
| typedef struct mdu_version_s { |
| int major; |
| int minor; |
| int patchlevel; |
| } mdu_version_t; |
| |
| typedef struct mdu_array_info_s { |
| /* |
| * Generic constant information |
| */ |
| int major_version; |
| int minor_version; |
| int patch_version; |
| int ctime; |
| int level; |
| int size; |
| int nr_disks; |
| int raid_disks; |
| int md_minor; |
| int not_persistent; |
| |
| /* |
| * Generic state information |
| */ |
| int utime; /* 0 Superblock update time */ |
| int state; /* 1 State bits (clean, ...) */ |
| int active_disks; /* 2 Number of currently active disks */ |
| int working_disks; /* 3 Number of working disks */ |
| int failed_disks; /* 4 Number of failed disks */ |
| int spare_disks; /* 5 Number of spare disks */ |
| |
| /* |
| * Personality information |
| */ |
| int layout; /* 0 the array's physical layout */ |
| int chunk_size; /* 1 chunk size in bytes */ |
| |
| } mdu_array_info_t; |
| |
| /* non-obvious values for 'level' */ |
| #define LEVEL_MULTIPATH (-4) |
| #define LEVEL_LINEAR (-1) |
| #define LEVEL_FAULTY (-5) |
| |
| /* we need a value for 'no level specified' and 0 |
| * means 'raid0', so we need something else. This is |
| * for internal use only |
| */ |
| #define LEVEL_NONE (-1000000) |
| |
| typedef struct mdu_disk_info_s { |
| /* |
| * configuration/status of one particular disk |
| */ |
| int number; |
| int major; |
| int minor; |
| int raid_disk; |
| int state; |
| |
| } mdu_disk_info_t; |
| |
| typedef struct mdu_start_info_s { |
| /* |
| * configuration/status of one particular disk |
| */ |
| int major; |
| int minor; |
| int raid_disk; |
| int state; |
| |
| } mdu_start_info_t; |
| |
| typedef struct mdu_bitmap_file_s |
| { |
| char pathname[4096]; |
| } mdu_bitmap_file_t; |
| |
| typedef struct mdu_param_s |
| { |
| int personality; /* 1,2,3,4 */ |
| int chunk_size; /* in bytes */ |
| int max_fault; /* unused for now */ |
| } mdu_param_t; |
| |
| #endif |
| |