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-rw-r--r--net/ceph/osdmap.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 20a38a37794c..ae8f367c5291 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -1596,6 +1596,72 @@ static int raw_to_up_osds(struct ceph_osdmap *osdmap,
return len;
}
+static void apply_primary_affinity(struct ceph_osdmap *osdmap, u32 pps,
+ struct ceph_pg_pool_info *pool,
+ int *osds, int len, int *primary)
+{
+ int i;
+ int pos = -1;
+
+ /*
+ * Do we have any non-default primary_affinity values for these
+ * osds?
+ */
+ if (!osdmap->osd_primary_affinity)
+ return;
+
+ for (i = 0; i < len; i++) {
+ if (osds[i] != CRUSH_ITEM_NONE &&
+ osdmap->osd_primary_affinity[i] !=
+ CEPH_OSD_DEFAULT_PRIMARY_AFFINITY) {
+ break;
+ }
+ }
+ if (i == len)
+ return;
+
+ /*
+ * Pick the primary. Feed both the seed (for the pg) and the
+ * osd into the hash/rng so that a proportional fraction of an
+ * osd's pgs get rejected as primary.
+ */
+ for (i = 0; i < len; i++) {
+ int osd;
+ u32 aff;
+
+ osd = osds[i];
+ if (osd == CRUSH_ITEM_NONE)
+ continue;
+
+ aff = osdmap->osd_primary_affinity[osd];
+ if (aff < CEPH_OSD_MAX_PRIMARY_AFFINITY &&
+ (crush_hash32_2(CRUSH_HASH_RJENKINS1,
+ pps, osd) >> 16) >= aff) {
+ /*
+ * We chose not to use this primary. Note it
+ * anyway as a fallback in case we don't pick
+ * anyone else, but keep looking.
+ */
+ if (pos < 0)
+ pos = i;
+ } else {
+ pos = i;
+ break;
+ }
+ }
+ if (pos < 0)
+ return;
+
+ *primary = osds[pos];
+
+ if (ceph_can_shift_osds(pool) && pos > 0) {
+ /* move the new primary to the front */
+ for (i = pos; i > 0; i--)
+ osds[i] = osds[i - 1];
+ osds[0] = *primary;
+ }
+}
+
/*
* Given up set, apply pg_temp and primary_temp mappings.
*
@@ -1698,6 +1764,8 @@ int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
len = raw_to_up_osds(osdmap, pool, osds, len, primary);
+ apply_primary_affinity(osdmap, pps, pool, osds, len, primary);
+
len = apply_temps(osdmap, pool, pgid, osds, len, primary);
return len;