include/linux/raid1.h

   1 #ifndef _RAID1_H
   2 #define _RAID1_H
   3
   4 #include <linux/md.h>
   5
   6 struct mirror_info {
   7         int             number;
   8         int             raid_disk;
   9         kdev_t          dev;
  10         int             next;
  11         int             sect_limit;
  12
  13         /*
  14          * State bits:
  15          */
  16         int             operational;
  17         int             write_only;
  18         int             spare;
  19 };
  20
  21 struct raid1_data {
  22         struct md_dev *mddev;
  23         struct mirror_info mirrors[MD_SB_DISKS];        /* RAID1 devices, 2 to MD_SB_DISKS */
  24         int raid_disks;
  25         int working_disks;                      /* Number of working disks */
  26         int last_used;
  27         unsigned long   next_sect;
  28         int             sect_count;
  29         int resync_running;
  30 };
  31
  32 /*
  33  * this is our 'private' 'collective' RAID1 buffer head.
  34  * it contains information about what kind of IO operations were started
  35  * for this RAID5 operation, and about their status:
  36  */
  37
  38 struct raid1_bh {
  39         unsigned int            remaining;
  40         int                     cmd;
  41         unsigned long           state;
  42         struct md_dev           *mddev;
  43         struct buffer_head      *master_bh;
  44         struct buffer_head      *mirror_bh [MD_SB_DISKS];
  45         struct buffer_head      bh_req;
  46         struct buffer_head      *next_retry;
  47 };
  48
  49 #endif