arch/all-pc/boot/grub2-aros/include/grub/raid.h

   1 /* raid.h - On disk structures for RAID. */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2006,2007,2008,2010  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef GRUB_RAID_H
  21 #define GRUB_RAID_H     1
  22
  23 #include <grub/types.h>
  24
  25 #define GRUB_RAID_LAYOUT_LEFT_ASYMMETRIC        0
  26 #define GRUB_RAID_LAYOUT_RIGHT_ASYMMETRIC       1
  27 #define GRUB_RAID_LAYOUT_LEFT_SYMMETRIC         2
  28 #define GRUB_RAID_LAYOUT_RIGHT_SYMMETRIC        3
  29
  30 #define GRUB_RAID_LAYOUT_RIGHT_MASK             1
  31 #define GRUB_RAID_LAYOUT_SYMMETRIC_MASK         2
  32
  33 struct grub_raid_member
  34 {
  35   grub_disk_t device;  /* Array of total_devs devices. */
  36   grub_disk_addr_t start_sector;
  37   /* Start of each device, in 512 byte sectors. */
  38 };
  39
  40 struct grub_raid_array
  41 {
  42   int number;              /* The device number, taken from md_minor so we
  43                               are consistent with the device name in
  44                               Linux. */
  45   int level;               /* RAID levels, only 0, 1 or 5 at the moment. */
  46   int layout;              /* Layout for RAID 5/6.  */
  47   unsigned int total_devs; /* Total number of devices in the array. */
  48   grub_size_t chunk_size;  /* The size of a chunk, in 512 byte sectors. */
  49   grub_uint64_t disk_size; /* Size of an individual disk, in 512 byte
  50                               sectors. */
  51   unsigned int index;               /* Index of current device.  */
  52   int uuid_len;            /* The length of uuid.  */
  53   char *uuid;              /* The UUID of the device. */
  54
  55   /* The following field is setup by the caller.  */
  56   char *name;              /* That will be "md<number>". */
  57   unsigned int nr_devs;    /* The number of devices we've found so far. */
  58   unsigned int allocated_devs;
  59   struct grub_raid_member *members;
  60   struct grub_raid_array *next;
  61
  62 #ifdef GRUB_UTIL
  63   struct grub_raid *driver;
  64 #endif
  65 };
  66
  67 struct grub_raid
  68 {
  69   const char *name;
  70
  71   grub_err_t (*detect) (grub_disk_t disk, struct grub_raid_array *array,
  72                         grub_disk_addr_t *start_sector);
  73
  74   struct grub_raid *next;
  75 };
  76 typedef struct grub_raid *grub_raid_t;
  77
  78 void grub_raid_register (grub_raid_t raid);
  79 void grub_raid_unregister (grub_raid_t raid);
  80
  81 void grub_raid_block_xor (char *buf1, const char *buf2, int size);
  82
  83 typedef grub_err_t (*grub_raid5_recover_func_t) (struct grub_raid_array *array,
  84                                                  int disknr, char *buf,
  85                                                  grub_disk_addr_t sector,
  86                                                  int size);
  87
  88 typedef grub_err_t (*grub_raid6_recover_func_t) (struct grub_raid_array *array,
  89                                                  int disknr, int p, char *buf,
  90                                                  grub_disk_addr_t sector,
  91                                                  int size);
  92
  93 extern grub_raid5_recover_func_t grub_raid5_recover_func;
  94 extern grub_raid6_recover_func_t grub_raid6_recover_func;
  95
  96 #endif /* ! GRUB_RAID_H */