| #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 |