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libceph: switch ceph_calc_pg_acting() to new helpers 

Switch ceph_calc_pg_acting() to new helpers: pg_to_raw_osds(),
raw_to_up_osds() and apply_temps().

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
Ilya Dryomov 2014-03-24 17:12:48 +02:00 committed by Sage Weil
parent 45966c3467
commit ac972230e2
2 changed files with 39 additions and 14 deletions
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2
include/linux/ceph/osdmap.h
View File

@ -212,7 +212,7 @@ extern int ceph_oloc_oid_to_pg(struct ceph_osdmap *osdmap,
extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap,
struct ceph_pg pgid,
int *acting);
int *osds);
extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
struct ceph_pg pgid);

51
net/ceph/osdmap.c
View File

@ -1649,24 +1649,49 @@ static int apply_temps(struct ceph_osdmap *osdmap,
}
/*
* Return acting set for given pgid.
* Calculate acting set for given pgid.
*
* Return acting set length, or error.
*/
int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
int *acting)
int *osds)
{
int rawosds[CEPH_PG_MAX_SIZE], *osds;
int i, o, num = CEPH_PG_MAX_SIZE;
struct ceph_pg_pool_info *pool;
u32 pps;
int len;
int primary;
osds = calc_pg_raw(osdmap, pgid, rawosds, &num);
if (!osds)
return -1;
pool = __lookup_pg_pool(&osdmap->pg_pools, pgid.pool);
if (!pool)
return 0;
/* primary is first up osd */
o = 0;
for (i = 0; i < num; i++)
if (ceph_osd_is_up(osdmap, osds[i]))
acting[o++] = osds[i];
return o;
if (pool->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
/* hash pool id and seed so that pool PGs do not overlap */
pps = crush_hash32_2(CRUSH_HASH_RJENKINS1,
ceph_stable_mod(pgid.seed, pool->pgp_num,
pool->pgp_num_mask),
pgid.pool);
} else {
/*
* legacy behavior: add ps and pool together. this is
* not a great approach because the PGs from each pool
* will overlap on top of each other: 0.5 == 1.4 ==
* 2.3 == ...
*/
pps = ceph_stable_mod(pgid.seed, pool->pgp_num,
pool->pgp_num_mask) +
(unsigned)pgid.pool;
}
len = pg_to_raw_osds(osdmap, pool, pgid, pps, osds);
if (len < 0)
return len;
len = raw_to_up_osds(osdmap, pool, osds, len, &primary);
len = apply_temps(osdmap, pool, pgid, osds, len, &primary);
return len;
}
/*