#include <string.h>
#include <unistd.h>
-#include <lttng/liblttngctl.h>
+#include <lttng/lttng.h>
#include "liblttsessiondcomm.h"
#include "lttngerr.h"
/* Prototypes */
static int check_tracing_group(const char *grp_name);
-static int ask_sessiond(enum lttcomm_command_type lct, void **buf);
+static int ask_sessiond(enum lttcomm_sessiond_command lct, void **buf);
static int recv_data_sessiond(void *buf, size_t len);
static int send_data_sessiond(void);
static int set_session_daemon_path(void);
*
* Return size of data (only payload, not header).
*/
-static int ask_sessiond(enum lttcomm_command_type lct, void **buf)
+static int ask_sessiond(enum lttcomm_sessiond_command lct, void **buf)
{
int ret;
size_t size;
void *data = NULL;
+ ret = lttng_connect_sessiond();
+ if (ret < 0) {
+ goto end;
+ }
+
lsm.cmd_type = lct;
/* Send command to session daemon */
goto end;
}
- size = llm.size_payload;
+ size = llm.trace_name_offset + llm.data_size;
if (size == 0) {
goto end;
}
ret = size;
end:
- /* Reset lsm data struct */
+ lttng_disconnect_sessiond();
memset(&lsm, 0, sizeof(lsm));
return ret;
}
+/*
+ * BEGIN KERNEL CONTROL
+ */
+
+/*
+ * lttng_kernel_enable_event
+ *
+ * Enable an event in the kernel tracer.
+ */
+int lttng_kernel_enable_event(char *event_name)
+{
+ strncpy(lsm.u.event.event_name, event_name, NAME_MAX);
+ return ask_sessiond(KERNEL_ENABLE_EVENT, NULL);
+}
+
+/*
+ * lttng_kernel_disable_event
+ *
+ * Disable an event in the kernel tracer.
+ */
+int lttng_kernel_disable_event(char *event_name)
+{
+ strncpy(lsm.u.event.event_name, event_name, NAME_MAX);
+ return ask_sessiond(KERNEL_DISABLE_EVENT, NULL);
+}
+
+/*
+ * lttng_kernel_create_session
+ *
+ * Create a session in the kernel tracer.
+ */
+int lttng_kernel_create_session(void)
+{
+ return ask_sessiond(KERNEL_CREATE_SESSION, NULL);
+}
+
+/*
+ * lttng_kernel_create_channel
+ *
+ * Create a channel in the kernel tracer.
+ */
+int lttng_kernel_create_channel(int overwrite,
+ u64 subbuf_size, u64 num_subbuf,
+ unsigned int switch_timer_interval,
+ unsigned int read_timer_interval)
+{
+ /* Write setting to the session message */
+ lsm.u.create_channel.overwrite = overwrite;
+ lsm.u.create_channel.subbuf_size = subbuf_size;
+ lsm.u.create_channel.num_subbuf = num_subbuf;
+ lsm.u.create_channel.switch_timer_interval = switch_timer_interval;
+ lsm.u.create_channel.read_timer_interval = read_timer_interval;
+
+ return ask_sessiond(KERNEL_CREATE_CHANNEL, NULL);
+}
+
+/*
+ * lttng_kernel_start_tracing
+ *
+ * Start kernel tracing.
+ */
+int lttng_kernel_start_tracing(void)
+{
+ return ask_sessiond(KERNEL_START_TRACE, NULL);
+}
+
+/*
+ * lttng_kernel_stop_tracing
+ *
+ * Stop kernel tracing.
+ */
+int lttng_kernel_stop_tracing(void)
+{
+ return ask_sessiond(KERNEL_STOP_TRACE, NULL);
+}
+
+/*
+ * END KERNEL CONTROL
+ */
+
/*
* lttng_get_readable_code
*
return lttcomm_get_readable_code(code);
}
+/*
+ * lttng_ust_start_trace
+ *
+ * Request a trace start for pid.
+ */
+int lttng_ust_start_trace(pid_t pid)
+{
+ int ret;
+
+ lsm.pid = pid;
+ ret = ask_sessiond(UST_START_TRACE, NULL);
+
+ return ret;
+}
+
+/*
+ * lttng_ust_stop_trace
+ *
+ * Request a trace stop for pid.
+ */
+int lttng_ust_stop_trace(pid_t pid)
+{
+ int ret;
+
+ lsm.pid = pid;
+ ret = ask_sessiond(UST_STOP_TRACE, NULL);
+
+ return ret;
+}
+
+/*
+ * lttng_ust_create_trace
+ *
+ * Request a trace creation for pid.
+ */
+int lttng_ust_create_trace(pid_t pid)
+{
+ int ret;
+
+ lsm.pid = pid;
+ ret = ask_sessiond(UST_CREATE_TRACE, NULL);
+
+ return ret;
+}
+
/*
* lttng_ust_list_apps
*
return ret / sizeof(pid_t);
}
+/*
+ * lttng_list_traces
+ *
+ * Ask the session daemon for all traces (kernel and ust)
+ * for the session identified by uuid.
+ *
+ * Return the number of traces.
+ */
+int lttng_list_traces(uuid_t *uuid, struct lttng_trace **traces)
+{
+ int ret;
+
+ uuid_copy(lsm.session_uuid, *uuid);
+
+ ret = ask_sessiond(LTTNG_LIST_TRACES, (void **) traces);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return ret / sizeof(struct lttng_trace);
+}
+
/*
* lttng_create_session
*
int lttng_create_session(char *name, uuid_t *session_id)
{
int ret;
- char *uuid;
strncpy(lsm.session_name, name, sizeof(lsm.session_name));
lsm.session_name[sizeof(lsm.session_name) - 1] = '\0';
goto end;
}
- uuid_copy(*session_id, llm.session_id);
+ uuid_copy(*session_id, llm.session_uuid);
end:
return ret;
{
int ret;
- uuid_copy(lsm.session_id, *uuid);
+ uuid_copy(lsm.session_uuid, *uuid);
ret = ask_sessiond(LTTNG_DESTROY_SESSION, NULL);
if (ret < 0) {
return 0;
}
+/*
+ * lttng_disconnect_sessiond
+ *
+ * Clean disconnect the session daemon.
+ */
+int lttng_disconnect_sessiond(void)
+{
+ int ret = 0;
+
+ if (connected) {
+ ret = lttcomm_close_unix_sock(sessiond_socket);
+ sessiond_socket = 0;
+ connected = 0;
+ }
+
+ return ret;
+}
+
+/*
+ * lttng_set_current_session_uuid
+ *
+ * Set the session uuid for current lsm.
+ */
+void lttng_set_current_session_uuid(uuid_t *uuid)
+{
+ uuid_copy(lsm.session_uuid, *uuid);
+}
+
/*
* lttng_set_tracing_group
*
/* Are we in the tracing group ? */
ret = check_tracing_group(tracing_group);
- if (ret < 0) {
+ if (ret < 0 && getuid() != 0) {
if (sprintf(sessiond_sock_path, DEFAULT_HOME_CLIENT_UNIX_SOCK,
getenv("HOME")) < 0) {
return -ENOMEM;
projects / lttng-tools.git / blobdiff