libceph: rename ceph_calc_pg_primary()

Rename ceph_calc_pg_primary() to ceph_pg_to_acting_primary() to
emphasise that it returns acting primary.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

fs/ceph/ioctl.c

@@ -221,7 +221,7 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
 		return r;
 	}
 
-	dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
+	dl.osd = ceph_pg_to_acting_primary(osdc->osdmap, &pgid);
 	if (dl.osd >= 0) {
 		struct ceph_entity_addr *a =
 			ceph_osd_addr(osdc->osdmap, dl.osd);

include/linux/ceph/osdmap.h

@@ -236,8 +236,8 @@ void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
 			       const struct ceph_pg *raw_pgid,
 			       struct ceph_osds *up,
 			       struct ceph_osds *acting);
-extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
-				struct ceph_pg pgid);
+int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
+			      const struct ceph_pg *raw_pgid);
 
 extern struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map,
 						    u64 id);

net/ceph/osdmap.c

@@ -1896,13 +1896,14 @@ void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
 }
 
 /*
- * Return primary osd for given pgid, or -1 if none.
+ * Return acting primary for given PG, or -1 if none.
  */
-int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid)
+int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
+			      const struct ceph_pg *raw_pgid)
 {
 	struct ceph_osds up, acting;
 
-	ceph_pg_to_up_acting_osds(osdmap, &pgid, &up, &acting);
+	ceph_pg_to_up_acting_osds(osdmap, raw_pgid, &up, &acting);
 	return acting.primary;
 }
-EXPORT_SYMBOL(ceph_calc_pg_primary);
+EXPORT_SYMBOL(ceph_pg_to_acting_primary);