ret = kernctl_create_channel(cmd_ctx->session->kernel_session->fd, chan);
if (ret < 0) {
+ perror("ioctl create channel");
goto error;
}
error:
return ret;
}
+
+/*
+ * kernel_open_metadata
+ *
+ * Open metadata stream.
+ */
+int kernel_open_metadata(struct ltt_kernel_session *session)
+{
+ int ret;
+ struct ltt_kernel_metadata *lkm;
+ struct lttng_kernel_channel *conf;
+
+ lkm = malloc(sizeof(struct ltt_kernel_metadata));
+ conf = malloc(sizeof(struct lttng_kernel_channel));
+
+ if (lkm == NULL || conf == NULL) {
+ perror("kernel open metadata malloc");
+ ret = -errno;
+ goto error;
+ }
+
+ conf->overwrite = DEFAULT_KERNEL_OVERWRITE;
+ conf->subbuf_size = DEFAULT_KERNEL_SUBBUF_SIZE;
+ conf->num_subbuf = DEFAULT_KERNEL_SUBBUF_NUM;
+ conf->switch_timer_interval = DEFAULT_KERNEL_SWITCH_TIMER;
+ conf->read_timer_interval = DEFAULT_KERNEL_READ_TIMER;
+
+ ret = kernctl_open_metadata(session->fd, conf);
+ if (ret < 0) {
+ goto error;
+ }
+
+ session->metadata = lkm;
+ session->metadata->fd = ret;
+ session->metadata->conf = conf;
+
+ return 0;
+
+error:
+ return ret;
+}