X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=liblttngctl%2Fliblttngctl.c;h=230a19d7e8a25805602e71c7f541451213dc9edf;hb=894be886aae0f1a1f49e63723511fcb15e816e7e;hp=1793bc53ad44a23195157427b30950f85bb8e9d6;hpb=96243366860d20e371efed0500070cdbc4a01ec7;p=lttng-tools.git

diff --git a/liblttngctl/liblttngctl.c b/liblttngctl/liblttngctl.c
index 1793bc53a..230a19d7e 100644
--- a/liblttngctl/liblttngctl.c
+++ b/liblttngctl/liblttngctl.c
@@ -39,7 +39,7 @@ static struct lttcomm_lttng_msg llm;
 
 /* 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);
@@ -105,7 +105,7 @@ end:
  *
  *  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;
@@ -136,7 +136,7 @@ static int ask_sessiond(enum lttcomm_command_type lct, void **buf)
 		goto end;
 	}
 
-	size = llm.size_payload;
+	size = llm.trace_name_offset + llm.data_size;
 	if (size == 0) {
 		goto end;
 	}
@@ -154,10 +154,89 @@ static int ask_sessiond(enum lttcomm_command_type lct, void **buf)
 
 end:
 	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
  *
@@ -250,7 +329,7 @@ int lttng_list_traces(uuid_t *uuid, struct lttng_trace **traces)
 {
 	int ret;
 
-	uuid_copy(lsm.session_id, *uuid);
+	uuid_copy(lsm.session_uuid, *uuid);
 
 	ret = ask_sessiond(LTTNG_LIST_TRACES, (void **) traces);
 	if (ret < 0) {
@@ -263,10 +342,9 @@ int lttng_list_traces(uuid_t *uuid, struct lttng_trace **traces)
 /*
  *  lttng_create_session
  *
- *  Create a brand new session using name. Allocate
- *  the session_id param pointing to the UUID.
+ *  Create a brand new session using name.
  */
-int lttng_create_session(char *name, uuid_t *session_id)
+int lttng_create_session(char *name)
 {
 	int ret;
 
@@ -278,8 +356,6 @@ int lttng_create_session(char *name, uuid_t *session_id)
 		goto end;
 	}
 
-	uuid_copy(*session_id, llm.session_id);
-
 end:
 	return ret;
 }
@@ -293,7 +369,7 @@ int lttng_destroy_session(uuid_t *uuid)
 {
 	int ret;
 
-	uuid_copy(lsm.session_id, *uuid);
+	uuid_copy(lsm.session_uuid, *uuid);
 
 	ret = ask_sessiond(LTTNG_DESTROY_SESSION, NULL);
 	if (ret < 0) {
@@ -377,7 +453,7 @@ int lttng_disconnect_sessiond(void)
  */
 void lttng_set_current_session_uuid(uuid_t *uuid)
 {
-	uuid_copy(lsm.session_id, *uuid);
+	uuid_copy(lsm.session_uuid, *uuid);
 }
 
 /*
@@ -431,7 +507,7 @@ static int set_session_daemon_path(void)
 
 	/* 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;