1 #ifndef _MULTIPATH_H
2 #define _MULTIPATH_H
3 
4 struct multipath_info {
5 	struct md_rdev	*rdev;
6 };
7 
8 struct mpconf {
9 	struct mddev			*mddev;
10 	struct multipath_info	*multipaths;
11 	int			raid_disks;
12 	spinlock_t		device_lock;
13 	struct list_head	retry_list;
14 
15 	mempool_t		*pool;
16 };
17 
18 /*
19  * this is our 'private' 'collective' MULTIPATH buffer head.
20  * it contains information about what kind of IO operations were started
21  * for this MULTIPATH operation, and about their status:
22  */
23 
24 struct multipath_bh {
25 	struct mddev			*mddev;
26 	struct bio		*master_bio;
27 	struct bio		bio;
28 	int			path;
29 	struct list_head	retry_list;
30 };
31 #endif
32