relayd: log destination trace chunk of ROTATE_STREAMS command

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/src/bin/lttng-relayd/main.c b/src/bin/lttng-relayd/main.c
index a3e2509d2865f733fc81675c1272a92136eae4c3..1cbebdcf23ca4f9f901ea7855b3d3543fcc10da2 100644 (file)
--- a/src/bin/lttng-relayd/main.c
+++ b/src/bin/lttng-relayd/main.c
@@ -37,6 +37,7 @@
 #include <inttypes.h>
 #include <urcu/futex.h>
 #include <urcu/uatomic.h>
+#include <urcu/rculist.h>
 #include <unistd.h>
 #include <fcntl.h>
 
@@ -58,7 +59,7 @@
 #include <common/config/session-config.h>
 #include <common/dynamic-buffer.h>
 #include <common/buffer-view.h>
-#include <urcu/rculist.h>
+#include <common/string-utils/format.h>
 
 #include "cmd.h"
 #include "ctf-trace.h"
@@ -2127,6 +2128,8 @@ static int relay_rotate_session_streams(
        const size_t header_len = sizeof(struct lttcomm_relayd_rotate_streams);
        struct lttng_trace_chunk *next_trace_chunk = NULL;
        struct lttng_buffer_view stream_positions;
+       char chunk_id_buf[MAX_INT_DEC_LEN(uint64_t)];
+       const char *chunk_id_str = "none";
 
        if (!session || !conn->version_check_done) {
                ERR("Trying to rotate a stream before version check");
@@ -2180,8 +2183,20 @@ static int relay_rotate_session_streams(
                        ret = -1;
                        goto end;
                }
+
+               ret = snprintf(chunk_id_buf, sizeof(chunk_id_buf), "%" PRIu64,
+                               rotate_streams.new_chunk_id.value);
+               if (ret < 0 || ret >= sizeof(chunk_id_buf)) {
+                       chunk_id_str = "formatting error";
+               } else {
+                       chunk_id_str = chunk_id_buf;
+               }
        }
 
+       DBG("Rotate %" PRIu32 " streams of session \"%s\" to chunk \"%s\"",
+                       rotate_streams.stream_count, session->session_name,
+                       chunk_id_str);
+
        stream_positions = lttng_buffer_view_from_view(payload,
                        sizeof(rotate_streams), -1);
        if (!stream_positions.data ||