libceph: return primary from ceph_calc_pg_acting()
In preparation for adding support for primary_temp, stop assuming
primaryness: add a primary out parameter to ceph_calc_pg_acting() and
change call sites accordingly. Primary is now specified separately
from the order of osds in the set.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index f1cad21..df9389d 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -1651,19 +1651,21 @@
/*
* Calculate acting set for given pgid.
*
- * Return acting set length, or error.
+ * Return acting set length, or error. *primary is set to acting
+ * primary osd id, or -1 if acting set is empty or on error.
*/
int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
- int *osds)
+ int *osds, int *primary)
{
struct ceph_pg_pool_info *pool;
u32 pps;
int len;
- int primary;
pool = __lookup_pg_pool(&osdmap->pg_pools, pgid.pool);
- if (!pool)
- return 0;
+ if (!pool) {
+ *primary = -1;
+ return -ENOENT;
+ }
if (pool->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
/* hash pool id and seed so that pool PGs do not overlap */
@@ -1684,12 +1686,14 @@
}
len = pg_to_raw_osds(osdmap, pool, pgid, pps, osds);
- if (len < 0)
+ if (len < 0) {
+ *primary = -1;
return len;
+ }
- len = raw_to_up_osds(osdmap, pool, osds, len, &primary);
+ len = raw_to_up_osds(osdmap, pool, osds, len, primary);
- len = apply_temps(osdmap, pool, pgid, osds, len, &primary);
+ len = apply_temps(osdmap, pool, pgid, osds, len, primary);
return len;
}