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