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md_u.h
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* 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 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) #define CLUSTERED_DISK_NACK _IO (MD_MAJOR, 0x35) /* 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; unsigned int ctime; int level; int size; int nr_disks; int raid_disks; int md_minor; int not_persistent; /* * Generic state information */ unsigned 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 /* _MD_U_H */
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