#include <urcu/list.h> /* URCU list library (-lurcu) */
#include <ust/ustctl.h> /* UST control lib (-lust) */
-#include <lttng/liblttngctl.h>
+#include <lttng/lttng.h>
#include "liblttsessiondcomm.h"
#include "ltt-sessiond.h"
/* Init */
trace->pid = pid;
trace->shmid = 0;
+ /* NOTE: to be removed. Trace name will no longer be
+ * required for LTTng userspace tracer. For now, we set it
+ * to 'auto' for API compliance.
+ */
+ snprintf(trace->name, 5, "auto");
/* Connect to app using ustctl API */
sock = connect_app(pid);
goto error;
}
- ret = ustctl_create_trace(sock, "auto");
+ ret = ustctl_create_trace(sock, trace->name);
if (ret < 0) {
ret = LTTCOMM_CREATE_FAIL;
goto error;
/* Check if current session is valid */
if (current_session) {
cds_list_add(&trace->list, ¤t_session->ust_traces);
+ current_session->ust_trace_count++;
}
error:
return ret;
}
+/*
+ * ust_stop_trace
+ *
+ * Stop a trace. This trace, identified by the pid, must be
+ * in the current session ust_traces list.
+ */
+static int ust_stop_trace(pid_t pid)
+{
+ int sock, ret;
+ struct ltt_ust_trace *trace;
+
+ DBG("Stopping trace for pid %d", pid);
+
+ trace = find_session_ust_trace_by_pid(current_session, pid);
+ if (trace == NULL) {
+ ret = LTTCOMM_NO_TRACE;
+ goto error;
+ }
+
+ /* Connect to app using ustctl API */
+ sock = connect_app(pid);
+ if (sock < 0) {
+ ret = LTTCOMM_NO_TRACEABLE;
+ goto error;
+ }
+
+ ret = ustctl_stop_trace(sock, trace->name);
+ if (ret < 0) {
+ ret = LTTCOMM_STOP_FAIL;
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
/*
* copy_common_data
*
/* No auxiliary data so only send the llm struct. */
goto end;
}
+ case LTTNG_LIST_TRACES:
+ {
+ unsigned int trace_count = get_trace_count_per_session(current_session);
+
+ if (trace_count == 0) {
+ ret = LTTCOMM_NO_TRACE;
+ goto end;
+ }
+
+ buf_size = setup_data_buffer(&send_buf,
+ sizeof(struct lttng_trace) * trace_count, &llm);
+ if (buf_size < 0) {
+ ret = LTTCOMM_FATAL;
+ goto end;
+ }
+
+ get_traces_per_session(current_session, (struct lttng_trace *)(send_buf + header_size));
+ break;
+ }
case UST_CREATE_TRACE:
{
ret = ust_create_trace(lsm->pid);
/* No auxiliary data so only send the llm struct. */
goto end;
}
+ case UST_STOP_TRACE:
+ {
+ ret = ust_stop_trace(lsm->pid);
+
+ /* No auxiliary data so only send the llm struct. */
+ goto end;
+ }
case LTTNG_LIST_SESSIONS:
{
unsigned int session_count = get_session_count();