31cfe714f2
* disk/raid.c: Likewise. * include/grub/raid.h: Likewise. * kern/emu/getroot.c: Likewise.
88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
/* raid.h - On disk structures for RAID. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_RAID_H
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#define GRUB_RAID_H 1
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#include <grub/types.h>
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#define GRUB_RAID_MAX_DEVICES 32
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#define GRUB_RAID_LAYOUT_LEFT_ASYMMETRIC 0
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#define GRUB_RAID_LAYOUT_RIGHT_ASYMMETRIC 1
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#define GRUB_RAID_LAYOUT_LEFT_SYMMETRIC 2
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#define GRUB_RAID_LAYOUT_RIGHT_SYMMETRIC 3
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#define GRUB_RAID_LAYOUT_RIGHT_MASK 1
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#define GRUB_RAID_LAYOUT_SYMMETRIC_MASK 2
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struct grub_raid_array
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{
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int number; /* The device number, taken from md_minor so we
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are consistent with the device name in
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Linux. */
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int level; /* RAID levels, only 0, 1 or 5 at the moment. */
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int layout; /* Layout for RAID 5/6. */
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unsigned int total_devs; /* Total number of devices in the array. */
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grub_size_t chunk_size; /* The size of a chunk, in 512 byte sectors. */
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grub_uint64_t disk_size; /* Size of an individual disk, in 512 byte
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sectors. */
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int index; /* Index of current device. */
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int uuid_len; /* The length of uuid. */
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char *uuid; /* The UUID of the device. */
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/* The following field is setup by the caller. */
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char *name; /* That will be "md<number>". */
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unsigned int nr_devs; /* The number of devices we've found so far. */
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grub_disk_t device[GRUB_RAID_MAX_DEVICES]; /* Array of total_devs devices. */
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grub_disk_addr_t start_sector[GRUB_RAID_MAX_DEVICES];
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/* Start of each device, in 512 byte sectors. */
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struct grub_raid_array *next;
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};
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struct grub_raid
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{
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const char *name;
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grub_err_t (*detect) (grub_disk_t disk, struct grub_raid_array *array,
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grub_disk_addr_t *start_sector);
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struct grub_raid *next;
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};
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typedef struct grub_raid *grub_raid_t;
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void grub_raid_register (grub_raid_t raid);
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void grub_raid_unregister (grub_raid_t raid);
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void grub_raid_block_xor (char *buf1, const char *buf2, int size);
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typedef grub_err_t (*grub_raid5_recover_func_t) (struct grub_raid_array *array,
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int disknr, char *buf,
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grub_disk_addr_t sector,
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int size);
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typedef grub_err_t (*grub_raid6_recover_func_t) (struct grub_raid_array *array,
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int disknr, int p, char *buf,
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grub_disk_addr_t sector,
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int size);
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extern grub_raid5_recover_func_t grub_raid5_recover_func;
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extern grub_raid6_recover_func_t grub_raid6_recover_func;
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#endif /* ! GRUB_RAID_H */
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