Channel rotate pipe between sessiond and the consumers

[lttng-tools.git] / src / common / ust-consumer / ust-consumer.c

diff --git a/src/common/ust-consumer/ust-consumer.c b/src/common/ust-consumer/ust-consumer.c
index 775cb1766f62e4a356cf49ca739351c4cedc7dac..5e1ff896c4e37102bf895819717eda89aefbbba3 100644 (file)
--- a/src/common/ust-consumer/ust-consumer.c
+++ b/src/common/ust-consumer/ust-consumer.c
@@ -1918,6 +1918,47 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
                }
                goto end_msg_sessiond;
        }
+       case LTTNG_CONSUMER_SET_CHANNEL_ROTATE_PIPE:
+       {
+               int channel_rotate_pipe;
+               int flags;
+
+               ret_code = LTTCOMM_CONSUMERD_SUCCESS;
+               /* Successfully received the command's type. */
+               ret = consumer_send_status_msg(sock, ret_code);
+               if (ret < 0) {
+                       goto error_fatal;
+               }
+
+               ret = lttcomm_recv_fds_unix_sock(sock, &channel_rotate_pipe, 1);
+               if (ret != sizeof(channel_rotate_pipe)) {
+                       ERR("Failed to receive channel rotate pipe");
+                       goto error_fatal;
+               }
+
+               DBG("Received channel rotate pipe (%d)", channel_rotate_pipe);
+               ctx->channel_rotate_pipe = channel_rotate_pipe;
+               /* Set the pipe as non-blocking. */
+               ret = fcntl(channel_rotate_pipe, F_GETFL, 0);
+               if (ret == -1) {
+                       PERROR("fcntl get flags of the channel rotate pipe");
+                       goto error_fatal;
+               }
+               flags = ret;
+
+               ret = fcntl(channel_rotate_pipe, F_SETFL, flags | O_NONBLOCK);
+               if (ret == -1) {
+                       PERROR("fcntl set O_NONBLOCK flag of the channel rotate pipe");
+                       goto error_fatal;
+               }
+               DBG("Channel rotate pipe set as non-blocking");
+               ret_code = LTTCOMM_CONSUMERD_SUCCESS;
+               ret = consumer_send_status_msg(sock, ret_code);
+               if (ret < 0) {
+                       goto error_fatal;
+               }
+               break;
+       }
        case LTTNG_CONSUMER_ROTATE_RENAME:
        {
                DBG("Consumer rename session %" PRIu64 " after rotation",