+static int recv_reply_ignore(struct lttcomm_relayd_sock *rsock, size_t size)
+{
+ int ret;
+ size_t cutfoff = 128;
+
+ /*
+ * To prevent ever growing size of recv_reply to ignore, if the number
+ * of bytes we want to ignore is bigger than `cutoff`, consume half of
+ * the cutoff. We might block on it but still, most of bytes to ignore
+ * should already be ready to consume at this point.
+ *
+ * This kind of scenario can easily happen on stopped session with a
+ * live_timer since no actual receive is done on the socket that would
+ * discard the `ignore` portion.
+ *
+ * TCP guarantee in-order transmission both on send and receive so this
+ * is safe to do.
+ */
+ if (rsock->bytes_to_ignore_on_recv >= cutfoff) {
+ size_t to_discard = cutfoff / 2;
+
+ ret = rsock->sock.ops->recvmsg(&rsock->sock, NULL, to_discard, MSG_TRUNC);
+ if (ret <= 0 || ret != to_discard) {
+ if (ret == 0) {
+ /* Orderly shutdown. */
+ DBG("Socket %d has performed an orderly shutdown", rsock->sock.fd);
+ } else {
+ DBG("Receiving reply to discard failed on sock %d for size %zu with ret %d",
+ rsock->sock.fd, to_discard, ret);
+ }
+ ret = -1;
+ goto error;
+ }
+
+ DBG("Force discard of %zu bytes for socket %d", to_discard, rsock->sock.fd);
+ rsock->bytes_to_ignore_on_recv -= to_discard;
+ }
+
+ DBG3("Relayd ignore reply of %zu bytes for socket %d.", size, rsock->sock.fd);
+ /* Do not wait for the current reply to be ignored */
+ rsock->bytes_to_ignore_on_recv += size;
+ ret = 0;
+
+error:
+ return ret;
+}
+