Relay rotate pending command

[lttng-tools.git] / src / bin / lttng-sessiond / rotate.c

diff --git a/src/bin/lttng-sessiond/rotate.c b/src/bin/lttng-sessiond/rotate.c
index 49ccea94e381fd6ee520162b8c362f310efe7e9e..3ca80ce6a8a16ad970b6a9c99ddf2a3543201b2d 100644 (file)
--- a/src/bin/lttng-sessiond/rotate.c
+++ b/src/bin/lttng-sessiond/rotate.c
@@ -32,6 +32,8 @@
 #include <signal.h>
 #include <inttypes.h>
 
+#include <lttng/rotate-internal.h>
+
 #include "session.h"
 #include "rotate.h"
 #include "rotation-thread.h"
@@ -350,3 +352,50 @@ error:
 end:
        return ret;
 }
+
+int relay_rotate_pending(struct ltt_session *session, uint64_t chunk_id)
+{
+       int ret;
+       struct consumer_socket *socket;
+       struct consumer_output *output;
+       struct lttng_ht_iter iter;
+
+       /*
+        * Either one of the sessions is enough to find the consumer_output
+        * and uid/gid.
+        */
+       if (session->kernel_session) {
+               output = session->kernel_session->consumer;
+       } else if (session->ust_session) {
+               output = session->ust_session->consumer;
+       } else {
+               assert(0);
+       }
+
+       if (!output || !output->socks) {
+               ERR("No consumer output found");
+               ret = -1;
+               goto end;
+       }
+
+       ret = -1;
+
+       rcu_read_lock();
+       /*
+        * We have to iterate to find a socket, but we only need to send the
+        * rotate pending command to one consumer, so we break after the first
+        * one.
+        */
+       cds_lfht_for_each_entry(output->socks->ht, &iter.iter, socket,
+                       node.node) {
+               pthread_mutex_lock(socket->lock);
+               ret = consumer_rotate_pending_relay(socket, output, session->id,
+                               chunk_id);
+               pthread_mutex_unlock(socket->lock);
+               break;
+       }
+       rcu_read_unlock();
+
+end:
+       return ret;
+}