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40 lines
884 B
40 lines
884 B
#ifndef _MULTIPATH_H
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#define _MULTIPATH_H
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struct multipath_info {
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mdk_rdev_t *rdev;
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};
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struct multipath_private_data {
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mddev_t *mddev;
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struct multipath_info *multipaths;
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int raid_disks;
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int working_disks;
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spinlock_t device_lock;
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struct list_head retry_list;
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mempool_t *pool;
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};
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typedef struct multipath_private_data multipath_conf_t;
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/*
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* this is the only point in the RAID code where we violate
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* C type safety. mddev->private is an 'opaque' pointer.
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*/
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#define mddev_to_conf(mddev) ((multipath_conf_t *) mddev->private)
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/*
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* this is our 'private' 'collective' MULTIPATH buffer head.
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* it contains information about what kind of IO operations were started
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* for this MULTIPATH operation, and about their status:
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*/
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struct multipath_bh {
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mddev_t *mddev;
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struct bio *master_bio;
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struct bio bio;
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int path;
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struct list_head retry_list;
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};
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#endif
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