X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=liblttsessiondcomm%2Fliblttsessiondcomm.h;h=6d6290d0a455cf34e2ec6ed043bdb471864a63f3;hp=b52d1dd5b5c19655e617967e773d49ef9d14a15f;hb=ca95a21633510288dbb18a3cd8825195e5cbb4f3;hpb=fac6795d6e2c60e79bdc7dab42da94d2025a57d3

diff --git a/liblttsessiondcomm/liblttsessiondcomm.h b/liblttsessiondcomm/liblttsessiondcomm.h
index b52d1dd5b..6d6290d0a 100644
--- a/liblttsessiondcomm/liblttsessiondcomm.h
+++ b/liblttsessiondcomm/liblttsessiondcomm.h
@@ -31,15 +31,10 @@
 /* Queue size of listen(2) */
 #define MAX_LISTEN 10
 
-/* Maximum amount of PID the list_apps command
- * can send back to the lttng client.
- */
-#define MAX_APPS_PID 20
-
 /* Get the error code index from 0 since
  * LTTCOMM_OK start at 1000
  */
-#define LTTCOMM_ERR_INDEX(code) code - LTTCOMM_OK
+#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK)
 
 enum lttcomm_command_type {
 	LTTNG_CREATE_SESSION,
@@ -78,6 +73,9 @@ enum lttcomm_return_code {
 	LTTCOMM_SESSION_FAIL,	/* Create session fail */
 	LTTCOMM_START_FAIL,		/* Start tracing fail */
 	LTTCOMM_LIST_FAIL,		/* Listing apps fail */
+	LTTCOMM_NO_APPS,		/* No traceable application */
+	LTTCOMM_NO_SESS,		/* No sessions available */
+	LTTCOMM_FATAL,			/* Session daemon had a fatal error */
 	LTTCOMM_NR,				/* Last element */
 };
 
@@ -118,7 +116,11 @@ struct lttcomm_session_msg {
 };
 
 /*
- * Data structure for the lttng client response
+ * Data structure for the lttng client response.
+ *
+ * This data structure is the control struct use in
+ * the header of the transmission. NEVER put variable
+ * size data in here.
  */
 struct lttcomm_lttng_msg {
 	enum lttcomm_command_type cmd_type;
@@ -126,13 +128,7 @@ struct lttcomm_lttng_msg {
 	uuid_t session_id;
 	pid_t pid;
 	char trace_name[NAME_MAX];
-	union {
-		/* UST_LIST_APPS */
-		struct {
-			size_t size;
-			pid_t pids[MAX_APPS_PID];
-		} list_apps;
-	} u;
+	unsigned int size_payload;
 };
 
 extern int lttcomm_create_unix_sock(const char *pathname);