libceph: disambiguate cluster/pool full log message

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

net/ceph/osd_client.c

@@ -2385,7 +2385,11 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
 		if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
 			err = -ENOSPC;
 		} else {
-			pr_warn_ratelimited("FULL or reached pool quota\n");
+			if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL))
+				pr_warn_ratelimited("cluster is full (osdmap FULL)\n");
+			else
+				pr_warn_ratelimited("pool %lld is full or reached quota\n",
+						    req->r_t.base_oloc.pool);
 			req->r_t.paused = true;
 			maybe_request_map(osdc);
 		}