| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |