X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Frelayd%2Frelayd.c;h=785d3dc584bd66d2d825a0df09f9e63d0e49cc02;hp=cf3649397425840b9c0c0e0ae07d22073255f0fa;hb=c8f59ee5fc11492ef472dc5cfd2fd2c4926b1787;hpb=806e2684ce24d3772af37ee46c5f0500c7a0723f

diff --git a/src/common/relayd/relayd.c b/src/common/relayd/relayd.c
index cf3649397..785d3dc58 100644
--- a/src/common/relayd/relayd.c
+++ b/src/common/relayd/relayd.c
@@ -341,3 +341,95 @@ int relayd_send_close_stream(struct lttcomm_sock *sock, uint64_t stream_id,
 error:
 	return ret;
 }
+
+/*
+ * Check for data availability for a given stream id.
+ *
+ * Return 0 if NOT available, 1 if so and a negative value on error.
+ */
+int relayd_data_available(struct lttcomm_sock *sock, uint64_t stream_id,
+		uint64_t last_net_seq_num)
+{
+	int ret;
+	struct lttcomm_relayd_data_available msg;
+	struct lttcomm_relayd_generic_reply reply;
+
+	/* Code flow error. Safety net. */
+	assert(sock);
+
+	DBG("Relayd data available for stream id %" PRIu64, stream_id);
+
+	msg.stream_id = htobe64(stream_id);
+	msg.last_net_seq_num = htobe64(last_net_seq_num);
+
+	/* Send command */
+	ret = send_command(sock, RELAYD_DATA_AVAILABLE, (void *) &msg,
+			sizeof(msg), 0);
+	if (ret < 0) {
+		goto error;
+	}
+
+	/* Recevie response */
+	ret = recv_reply(sock, (void *) &reply, sizeof(reply));
+	if (ret < 0) {
+		goto error;
+	}
+
+	reply.ret_code = be32toh(reply.ret_code);
+
+	/* Return session id or negative ret code. */
+	if (reply.ret_code >= LTTNG_OK) {
+		ret = -reply.ret_code;
+		ERR("Relayd data available replied error %d", ret);
+	}
+
+	/* At this point, the ret code is either 1 or 0 */
+	ret = reply.ret_code;
+
+	DBG("Relayd data is %s available for stream id %" PRIu64,
+			ret == 1 ? "" : "NOT", stream_id);
+
+error:
+	return ret;
+}
+
+/*
+ * Check on the relayd side for a quiescent state on the control socket.
+ */
+int relayd_quiescent_control(struct lttcomm_sock *sock)
+{
+	int ret;
+	struct lttcomm_relayd_generic_reply reply;
+
+	/* Code flow error. Safety net. */
+	assert(sock);
+
+	DBG("Relayd checking quiescent control state");
+
+	/* Send command */
+	ret = send_command(sock, RELAYD_QUIESCENT_CONTROL, NULL, 0, 0);
+	if (ret < 0) {
+		goto error;
+	}
+
+	/* Recevie response */
+	ret = recv_reply(sock, (void *) &reply, sizeof(reply));
+	if (ret < 0) {
+		goto error;
+	}
+
+	reply.ret_code = be32toh(reply.ret_code);
+
+	/* Return session id or negative ret code. */
+	if (reply.ret_code != LTTNG_OK) {
+		ret = -reply.ret_code;
+		ERR("Relayd quiescent control replied error %d", ret);
+		goto error;
+	}
+
+	/* Control socket is quiescent */
+	return 1;
+
+error:
+	return ret;
+}