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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 423 | giacomo | 1 | #ifndef _MULTIPATH_H |
| 2 | #define _MULTIPATH_H |
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| 3 | |||
| 4 | #include <linux/raid/md.h> |
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| 5 | |||
| 6 | struct multipath_info { |
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| 7 | mdk_rdev_t *rdev; |
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| 8 | }; |
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| 9 | |||
| 10 | struct multipath_private_data { |
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| 11 | mddev_t *mddev; |
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| 12 | struct multipath_info *multipaths; |
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| 13 | int raid_disks; |
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| 14 | int working_disks; |
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| 15 | spinlock_t device_lock; |
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| 16 | |||
| 17 | mempool_t *pool; |
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| 18 | }; |
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| 19 | |||
| 20 | typedef struct multipath_private_data multipath_conf_t; |
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| 21 | |||
| 22 | /* |
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| 23 | * this is the only point in the RAID code where we violate |
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| 24 | * C type safety. mddev->private is an 'opaque' pointer. |
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| 25 | */ |
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| 26 | #define mddev_to_conf(mddev) ((multipath_conf_t *) mddev->private) |
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| 27 | |||
| 28 | /* |
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| 29 | * this is our 'private' 'collective' MULTIPATH buffer head. |
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| 30 | * it contains information about what kind of IO operations were started |
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| 31 | * for this MULTIPATH operation, and about their status: |
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| 32 | */ |
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| 33 | |||
| 34 | struct multipath_bh { |
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| 35 | mddev_t *mddev; |
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| 36 | struct bio *master_bio; |
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| 37 | struct bio bio; |
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| 38 | int path; |
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| 39 | struct multipath_bh *next_mp; /* next for retry */ |
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| 40 | }; |
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| 41 | #endif |