multipath.h

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#ifndef _MULTIPATH_H
#define _MULTIPATH_H

struct multipath_info {
    struct md_rdev  *rdev;
};

struct mpconf {
    struct mddev            *mddev;
    struct multipath_info   *multipaths;
    int         raid_disks;
    spinlock_t      device_lock;
    struct list_head    retry_list;

    mempool_t       *pool;
};

/*
 * 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 {
    struct mddev            *mddev;
    struct bio      *master_bio;
    struct bio      bio;
    int         path;
    struct list_head    retry_list;
};
#endif