X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;ds=sidebyside;f=liblttsessiondcomm%2Fliblttsessiondcomm.h;h=adb9a8d843572d96f62938d02daf0ea111599c89;hb=93128a92561c2964186015a7e075c607613e6e75;hp=b52d1dd5b5c19655e617967e773d49ef9d14a15f;hpb=fac6795d6e2c60e79bdc7dab42da94d2025a57d3;p=lttng-tools.git

diff --git a/liblttsessiondcomm/liblttsessiondcomm.h b/liblttsessiondcomm/liblttsessiondcomm.h
index b52d1dd5b..adb9a8d84 100644
--- a/liblttsessiondcomm/liblttsessiondcomm.h
+++ b/liblttsessiondcomm/liblttsessiondcomm.h
@@ -1,4 +1,6 @@
-/* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+/*
+ * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ *                      Julien Desfossez <julien.desfossez@polymtl.ca>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -22,26 +24,33 @@
 #include <limits.h>
 #include <uuid/uuid.h>
 
+/*
+ * FIXME: 32, 64bit enums -> uint32_t uint64_t for data exchange.
+ * Same for pid_t.
+ */
+
+#define LTTNG_RUNDIR						"/var/run/lttng"
+
 /* Default unix socket path */
-#define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK		"/tmp/client-ltt-sessiond"
-#define DEFAULT_GLOBAL_APPS_UNIX_SOCK		"/tmp/apps-ltt-sessiond"
+#define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK		LTTNG_RUNDIR "/client-ltt-sessiond"
+#define DEFAULT_GLOBAL_APPS_UNIX_SOCK		LTTNG_RUNDIR "/apps-ltt-sessiond"
 #define DEFAULT_HOME_APPS_UNIX_SOCK			"%s/.apps-ltt-sessiond"
 #define DEFAULT_HOME_CLIENT_UNIX_SOCK		"%s/.client-ltt-sessiond"
 
+/* Kernel consumer path */
+#define KCONSUMERD_PATH						LTTNG_RUNDIR "/kconsumerd"
+#define KCONSUMERD_CMD_SOCK_PATH			KCONSUMERD_PATH "/command"
+#define KCONSUMERD_ERR_SOCK_PATH			KCONSUMERD_PATH "/error"
+
 /* 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 {
+enum lttcomm_sessiond_command {
 	LTTNG_CREATE_SESSION,
 	LTTNG_DESTROY_SESSION,
 	LTTNG_FORCE_SUBBUF_SWITCH,
@@ -50,6 +59,7 @@ enum lttcomm_command_type {
 	LTTNG_GET_SUBBUF_NUM_SIZE,
 	LTTNG_LIST_MARKERS,
 	LTTNG_LIST_SESSIONS,
+	LTTNG_LIST_TRACES,
 	LTTNG_LIST_TRACE_EVENTS,
 	LTTNG_SETUP_TRACE,
 	LTTNG_SET_SOCK_PATH,
@@ -77,16 +87,38 @@ enum lttcomm_return_code {
 	LTTCOMM_CREATE_FAIL,	/* Create trace fail */
 	LTTCOMM_SESSION_FAIL,	/* Create session fail */
 	LTTCOMM_START_FAIL,		/* Start tracing fail */
+	LTTCOMM_STOP_FAIL,		/* Stop tracing fail */
 	LTTCOMM_LIST_FAIL,		/* Listing apps fail */
+	LTTCOMM_NO_APPS,		/* No traceable application */
+	LTTCOMM_NO_SESS,		/* No sessions available */
+	LTTCOMM_NO_TRACE,		/* No trace exist */
+	LTTCOMM_FATAL,			/* Session daemon had a fatal error */
+	LTTCOMM_NO_TRACEABLE,	/* Error for non traceable app */
+	LTTCOMM_SELECT_SESS,	/* Must select a session */
+	LTTCOMM_EXIST_SESS,		/* Session name already exist */
 	LTTCOMM_NR,				/* Last element */
 };
 
+/* commands for kconsumerd */
+enum lttcomm_consumerd_command {
+	LTTCOMM_ADD_STREAM = 1100,
+	LTTCOMM_UPDATE_STREAM, /* pause, delete, start depending on fd state */
+	LTTCOMM_STOP, /* delete all */
+};
+
+/* state of each fd in consumerd */
+enum lttcomm_kconsumerd_fd_state {
+	ACTIVE_FD,
+	PAUSE_FD,
+	DELETE_FD,
+};
+
 /*
  * Data structure for ltt-session received message
  */
 struct lttcomm_session_msg {
 	/* Common data to almost all command */
-	enum lttcomm_command_type cmd_type;
+	enum lttcomm_sessiond_command cmd_type;
 	uuid_t session_id;
 	char trace_name[NAME_MAX];
 	char session_name[NAME_MAX];
@@ -118,27 +150,47 @@ struct lttcomm_session_msg {
 };
 
 /*
- * Data structure for the lttng client response
+ * Data structure for the response from sessiond to the lttng client.
+ *
+ * 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;
+struct lttcomm_lttng_header {
+	enum lttcomm_sessiond_command cmd_type;
 	enum lttcomm_return_code ret_code;
 	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 payload_size;
+};
+
+/*
+ * Data structures for the kconsumerd communications
+ *
+ * The header structure is sent to the kconsumerd daemon to inform
+ * how many lttcomm_kconsumerd_msg it is about to receive
+ */
+struct lttcomm_kconsumerd_header {
+	unsigned int payload_size;
+	enum lttcomm_consumerd_command cmd_type;
+	enum lttcomm_return_code ret_code;
+};
+
+/* lttcomm_kconsumerd_msg represents a file descriptor to consume the
+ * data and a path name to write it
+ */
+struct lttcomm_kconsumerd_msg {
+	char path_name[PATH_MAX];
+	int fd;
+	enum lttcomm_kconsumerd_fd_state state;
 };
 
 extern int lttcomm_create_unix_sock(const char *pathname);
 extern int lttcomm_connect_unix_sock(const char *pathname);
 extern int lttcomm_accept_unix_sock(int sock);
 extern int lttcomm_listen_unix_sock(int sock);
+extern int lttcomm_close_unix_sock(int sock);
 extern ssize_t lttcomm_recv_unix_sock(int sock, void *buf, size_t len);
 extern ssize_t lttcomm_send_unix_sock(int sock, void *buf, size_t len);
 extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code);