bgpd: add basic packet-related tracepoints

Add tracepoints for:
- packet pushed to internal rx queue
- packet dequeued from rx queue and processed

Signed-off-by: Quentin Young <qlyoung@nvidia.com>

1 files changed, 88 insertions, 0 deletions

diff --git a/bgpd/bgp_trace.h b/bgpd/bgp_trace.h
new file mode 100644
index 0000000000..fd0d26bd5d
--- /dev/null
+++ b/bgpd/bgp_trace.h
@@ -0,0 +1,88 @@
+/* Tracing for BGP
+ *
+ * Copyright (C) 2020  NVIDIA Corporation
+ * Quentin Young
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if !defined(_BGP_TRACE_H) || defined(TRACEPOINT_HEADER_MULTI_READ)
+#define _BGP_TRACE_H
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_LTTNG
+
+#undef TRACEPOINT_PROVIDER
+#define TRACEPOINT_PROVIDER frr_bgp
+
+#undef TRACEPOINT_INCLUDE
+#define TRACEPOINT_INCLUDE "bgpd/bgp_trace.h"
+
+#include <lttng/tracepoint.h>
+
+#include "bgpd/bgpd.h"
+#include "lib/stream.h"
+
+/* clang-format off */
+
+TRACEPOINT_EVENT_CLASS(
+	frr_bgp,
+	packet_process,
+	TP_ARGS(struct peer *, peer, bgp_size_t, size),
+	TP_FIELDS(
+		ctf_string(peer, peer->host ? peer->host : "(unknown peer)")
+	)
+)
+
+#define PKT_PROCESS_TRACEPOINT_INSTANCE(name)                                  \
+	TRACEPOINT_EVENT_INSTANCE(                                             \
+		frr_bgp, packet_process, name,                                 \
+		TP_ARGS(struct peer *, peer, bgp_size_t, size))                \
+	TRACEPOINT_LOGLEVEL(frr_bgp, name, TRACE_INFO)
+
+PKT_PROCESS_TRACEPOINT_INSTANCE(open_process)
+PKT_PROCESS_TRACEPOINT_INSTANCE(keepalive_process)
+PKT_PROCESS_TRACEPOINT_INSTANCE(update_process)
+PKT_PROCESS_TRACEPOINT_INSTANCE(notification_process)
+PKT_PROCESS_TRACEPOINT_INSTANCE(capability_process)
+PKT_PROCESS_TRACEPOINT_INSTANCE(refresh_process)
+
+TRACEPOINT_EVENT(
+	frr_bgp,
+	packet_read,
+	TP_ARGS(struct peer *, peer, struct stream *, pkt),
+	TP_FIELDS(
+		ctf_string(peer, peer->host ? peer->host : "(unknown peer)")
+		ctf_integer(size_t, size, STREAM_READABLE(pkt))
+		ctf_sequence_hex(uint8_t, packet, pkt->data, size_t, STREAM_READABLE(pkt))
+	)
+)
+
+
+#include <lttng/tracepoint-event.h>
+
+#else /* HAVE_LTTNG */
+
+#define tracepoint(...)
+#define tracef(...)
+#define tracelog(...)
+#define tracepoint_enabled(...) true
+
+#endif /* HAVE_LTTNG */
+
+#endif /* _BGP_TRACE_H */