diff options
Diffstat (limited to 'include/grub/raid.h')
| -rw-r--r-- | include/grub/raid.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/include/grub/raid.h b/include/grub/raid.h new file mode 100644 index 0000000..d585363 --- /dev/null +++ b/include/grub/raid.h @@ -0,0 +1,96 @@ +/* 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 */ |