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https://github.com/ceph/ceph
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1ed7d25614
git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@1960 29311d96-e01e-0410-9327-a35deaab8ce9
56 lines
975 B
C
56 lines
975 B
C
#ifndef _CRUSH_CRUSH_H
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#define _CRUSH_CRUSH_H
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#include "types.h"
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#include "buckets.h"
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enum {
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CRUSH_RULE_TAKE,
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CRUSH_RULE_CHOOSE_FIRSTN,
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CRUSH_RULE_CHOOSE_INDEP,
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CRUSH_RULE_EMIT
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};
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#define CRUSH_MAX_DEPTH 10
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#define CRUSH_MAX_SET 10
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struct crush_rule_step {
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__u32 op;
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__s32 arg1;
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__s32 arg2;
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};
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struct crush_rule {
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__u32 len;
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struct crush_rule_step *steps;
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};
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struct crush_map {
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struct crush_bucket **buckets;
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struct crush_rule **rules;
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/* parent pointers */
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__u32 *bucket_parents;
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__u32 *device_parents;
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/* offload
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* size max_devices, values 0...0xffff
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* 0 == normal
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* 0x10000 == 100% offload (i.e. failed)
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*/
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__u32 *device_offload;
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__u32 max_buckets;
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__u32 max_rules;
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__u32 max_devices;
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};
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extern int crush_do_rule(struct crush_map *map,
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int ruleno,
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int x, int *result, int result_max,
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int forcefeed); /* -1 for none */
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/*extern int crush_decode(struct crush_map *map, struct ceph_bufferlist *bl);*/
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#endif
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