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#ifndef _RAID1_H
#define _RAID1_H
#include <linux/raid/md.h>
typedef struct mirror_info mirror_info_t;
struct mirror_info {
mdk_rdev_t *rdev;
sector_t head_position;
};
typedef struct r1bio_s r1bio_t;
struct r1_private_data_s {
mddev_t *mddev;
mirror_info_t *mirrors;
int raid_disks;
int working_disks;
int last_used;
sector_t next_seq_sect;
spinlock_t device_lock;
/* for use when syncing mirrors: */
spinlock_t resync_lock;
int nr_pending;
int barrier;
sector_t next_resync;
wait_queue_head_t wait_idle;
wait_queue_head_t wait_resume;
mempool_t *r1bio_pool;
mempool_t *r1buf_pool;
};
typedef struct r1_private_data_s conf_t;
/*
* this is the only point in the RAID code where we violate
* C type safety. mddev->private is an 'opaque' pointer.
*/
#define mddev_to_conf(mddev) ((conf_t *) mddev->private)
/*
* this is our 'private' RAID1 bio.
*
* it contains information about what kind of IO operations were started
* for this RAID1 operation, and about their status:
*/
struct r1bio_s {
atomic_t remaining; /* 'have we finished' count,
* used from IRQ handlers
*/
int cmd;
sector_t sector;
unsigned long state;
mddev_t *mddev;
/*
* original bio going to /dev/mdx
*/
struct bio *master_bio;
/*
* if the IO is in READ direction, then this bio is used:
*/
struct bio *read_bio;
int read_disk;
r1bio_t *next_r1; /* next for retry or in free list */
struct list_head retry_list;
/*
* if the IO is in WRITE direction, then multiple bios are used.
* We choose the number when they are allocated.
*/
struct bio *write_bios[0];
};
/* bits for r1bio.state */
#define R1BIO_Uptodate 1
#endif
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