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/* diskfilter.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_DISKFILTER_H
#define GRUB_DISKFILTER_H 1
#include <grub/types.h>
#include <grub/list.h>
enum
{
GRUB_RAID_LAYOUT_RIGHT_MASK = 1,
GRUB_RAID_LAYOUT_SYMMETRIC_MASK = 2,
GRUB_RAID_LAYOUT_MUL_FROM_POS = 4,
GRUB_RAID_LAYOUT_LEFT_ASYMMETRIC = 0,
GRUB_RAID_LAYOUT_RIGHT_ASYMMETRIC = GRUB_RAID_LAYOUT_RIGHT_MASK,
GRUB_RAID_LAYOUT_LEFT_SYMMETRIC = GRUB_RAID_LAYOUT_SYMMETRIC_MASK,
GRUB_RAID_LAYOUT_RIGHT_SYMMETRIC = (GRUB_RAID_LAYOUT_RIGHT_MASK
| GRUB_RAID_LAYOUT_SYMMETRIC_MASK)
};
struct grub_diskfilter_vg {
char *uuid;
grub_size_t uuid_len;
/* Optional. */
char *name;
grub_uint64_t extent_size;
struct grub_diskfilter_pv *pvs;
struct grub_diskfilter_lv *lvs;
struct grub_diskfilter_vg *next;
#ifdef GRUB_UTIL
struct grub_diskfilter *driver;
#endif
};
struct grub_diskfilter_pv_id {
union
{
char *uuid;
int id;
};
grub_size_t uuidlen;
};
struct grub_diskfilter_pv {
struct grub_diskfilter_pv_id id;
/* Optional. */
char *name;
grub_disk_t disk;
grub_disk_addr_t part_start;
grub_disk_addr_t part_size;
grub_disk_addr_t start_sector; /* Sector number where the data area starts. */
struct grub_diskfilter_pv *next;
/* Optional. */
grub_uint8_t *internal_id;
#ifdef GRUB_UTIL
char **partmaps;
#endif
};
struct grub_diskfilter_lv {
/* Name used for disk. */
char *fullname;
char *idname;
/* Optional. */
char *name;
int number;
unsigned int segment_count;
grub_size_t segment_alloc;
grub_uint64_t size;
int became_readable_at;
int scanned;
int visible;
/* Pointer to segment_count segments. */
struct grub_diskfilter_segment *segments;
struct grub_diskfilter_vg *vg;
struct grub_diskfilter_lv *next;
/* Optional. */
char *internal_id;
};
struct grub_diskfilter_segment {
grub_uint64_t start_extent;
grub_uint64_t extent_count;
enum
{
GRUB_DISKFILTER_STRIPED = 0,
GRUB_DISKFILTER_MIRROR = 1,
GRUB_DISKFILTER_RAID4 = 4,
GRUB_DISKFILTER_RAID5 = 5,
GRUB_DISKFILTER_RAID6 = 6,
GRUB_DISKFILTER_RAID10 = 10,
} type;
int layout;
/* valid only for raid10. */
grub_uint64_t raid_member_size;
unsigned int node_count;
unsigned int node_alloc;
struct grub_diskfilter_node *nodes;
unsigned int stripe_size;
};
struct grub_diskfilter_node {
grub_disk_addr_t start;
/* Optional. */
char *name;
struct grub_diskfilter_pv *pv;
struct grub_diskfilter_lv *lv;
};
struct grub_diskfilter_vg *
grub_diskfilter_get_vg_by_uuid (grub_size_t uuidlen, char *uuid);
struct grub_diskfilter
{
struct grub_diskfilter *next;
struct grub_diskfilter **prev;
const char *name;
struct grub_diskfilter_vg * (*detect) (grub_disk_t disk,
struct grub_diskfilter_pv_id *id,
grub_disk_addr_t *start_sector);
};
typedef struct grub_diskfilter *grub_diskfilter_t;
extern grub_diskfilter_t grub_diskfilter_list;
static inline void
grub_diskfilter_register_front (grub_diskfilter_t diskfilter)
{
grub_list_push (GRUB_AS_LIST_P (&grub_diskfilter_list),
GRUB_AS_LIST (diskfilter));
}
static inline void
grub_diskfilter_register_back (grub_diskfilter_t diskfilter)
{
grub_diskfilter_t p, *q;
for (q = &grub_diskfilter_list, p = *q; p; q = &p->next, p = *q);
diskfilter->next = NULL;
diskfilter->prev = q;
*q = diskfilter;
}
static inline void
grub_diskfilter_unregister (grub_diskfilter_t diskfilter)
{
grub_list_remove (GRUB_AS_LIST (diskfilter));
}
struct grub_diskfilter_vg *
grub_diskfilter_make_raid (grub_size_t uuidlen, char *uuid, int nmemb,
const char *name, grub_uint64_t disk_size,
grub_uint64_t stripe_size,
int layout, int level);
typedef grub_err_t (*grub_raid5_recover_func_t) (struct grub_diskfilter_segment *array,
int disknr, char *buf,
grub_disk_addr_t sector,
grub_size_t size);
typedef grub_err_t (*grub_raid6_recover_func_t) (struct grub_diskfilter_segment *array,
int disknr, int p, char *buf,
grub_disk_addr_t sector,
grub_size_t size);
extern grub_raid5_recover_func_t grub_raid5_recover_func;
extern grub_raid6_recover_func_t grub_raid6_recover_func;
typedef grub_err_t (* raid_recover_read_t)(void *data, int disk_nr,
grub_uint64_t addr, void *dest,
grub_size_t size);
extern grub_err_t
grub_raid6_recover_gen (void *data, grub_uint64_t nstripes, int disknr, int p,
char *buf, grub_uint64_t sector, grub_size_t size,
int layout, raid_recover_read_t read_func);
grub_err_t grub_diskfilter_vg_register (struct grub_diskfilter_vg *vg);
grub_err_t
grub_diskfilter_read_node (const struct grub_diskfilter_node *node,
grub_disk_addr_t sector,
grub_size_t size, char *buf);
#ifdef GRUB_UTIL
struct grub_diskfilter_pv *
grub_diskfilter_get_pv_from_disk (grub_disk_t disk,
struct grub_diskfilter_vg **vg);
void
grub_diskfilter_get_partmap (grub_disk_t disk,
void (*cb) (const char *val, void *data),
void *data);
#endif
#endif /* ! GRUB_RAID_H */
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