[deliverable/linux.git] / include / linux / raid / multipath.h

#ifndef _MULTIPATH_H
#define _MULTIPATH_H

#include <linux/raid/md.h>

struct multipath_info {
	mdk_rdev_t	*rdev;
};

struct multipath_private_data {
	mddev_t			*mddev;
	struct multipath_info	*multipaths;
	int			raid_disks;
	int			working_disks;
	spinlock_t		device_lock;
	struct list_head	retry_list;

	mempool_t		*pool;
};

typedef struct multipath_private_data multipath_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) ((multipath_conf_t *) mddev->private)

/*
 * this is our 'private' 'collective' MULTIPATH buffer head.
 * it contains information about what kind of IO operations were started
 * for this MULTIPATH operation, and about their status:
 */

struct multipath_bh {
	mddev_t			*mddev;
	struct bio		*master_bio;
	struct bio		bio;
	int			path;
	struct list_head	retry_list;
};
#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _MULTIPATH_H
	2	#define _MULTIPATH_H
	3
	4	#include <linux/raid/md.h>
	5
	6	struct multipath_info {
	7	mdk_rdev_t *rdev;
	8	};
	9
	10	struct multipath_private_data {
	11	mddev_t *mddev;
	12	struct multipath_info *multipaths;
	13	int raid_disks;
	14	int working_disks;
	15	spinlock_t device_lock;
	16	struct list_head retry_list;
	17
	18	mempool_t *pool;
	19	};
	20
	21	typedef struct multipath_private_data multipath_conf_t;
	22
	23	/*
	24	* this is the only point in the RAID code where we violate
	25	* C type safety. mddev->private is an 'opaque' pointer.
	26	*/
	27	#define mddev_to_conf(mddev) ((multipath_conf_t *) mddev->private)
	28
	29	/*
	30	* this is our 'private' 'collective' MULTIPATH buffer head.
	31	* it contains information about what kind of IO operations were started
	32	* for this MULTIPATH operation, and about their status:
	33	*/
	34
	35	struct multipath_bh {
	36	mddev_t *mddev;
	37	struct bio *master_bio;
	38	struct bio bio;
	39	int path;
	40	struct list_head retry_list;
	41	};
	42	#endif