You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
2.1 KiB
99 lines
2.1 KiB
20 years ago
|
#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;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* memory pools need a pointer to the mddev, so they can force an unplug
|
||
|
|
* when memory is tight, and a count of the number of drives that the
|
||
|
|
* pool was allocated for, so they know how much to allocate and free.
|
||
|
|
* mddev->raid_disks cannot be used, as it can change while a pool is active
|
||
|
|
* These two datums are stored in a kmalloced struct.
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct pool_info {
|
||
|
|
mddev_t *mddev;
|
||
|
|
int raid_disks;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
struct list_head retry_list;
|
||
|
|
/* 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;
|
||
|
|
|
||
|
|
struct pool_info *poolinfo;
|
||
|
|
|
||
|
|
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
|
||
|
|
*/
|
||
|
|
sector_t sector;
|
||
|
|
int sectors;
|
||
|
|
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 is where we read
|
||
|
|
*/
|
||
|
|
int read_disk;
|
||
|
|
|
||
|
|
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 *bios[0];
|
||
|
|
};
|
||
|
|
|
||
|
|
/* bits for r1bio.state */
|
||
|
|
#define R1BIO_Uptodate 0
|
||
|
|
#define R1BIO_IsSync 1
|
||
|
|
#endif
|