X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=liblttsessiondcomm%2Fliblttsessiondcomm.h;h=8b505eb980f3ea6782ec0cef60083c2f2549f4d0;hp=967c77c206c24c400feb090d37da7c108c96dc3f;hb=d4a1283e471c152cedf6cb5ebcc74d509009145d;hpb=d6f421500e248dee6c9b8ccac863a3840d4fbff6

diff --git a/liblttsessiondcomm/liblttsessiondcomm.h b/liblttsessiondcomm/liblttsessiondcomm.h
index 967c77c20..8b505eb98 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
@@ -22,6 +24,8 @@
 #include <limits.h>
 #include <uuid/uuid.h>
 
+#include "lttng-share.h"
+
 #define LTTNG_RUNDIR						"/var/run/lttng"
 
 /* Default unix socket path */
@@ -43,7 +47,7 @@
  */
 #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,
@@ -90,18 +94,40 @@ enum lttcomm_return_code {
 	LTTCOMM_SELECT_SESS,	/* Must select a session */
 	LTTCOMM_EXIST_SESS,		/* Session name already exist */
 	LTTCOMM_NR,				/* Last element */
+	KCONSUMERD_COMMAND_SOCK_READY,	/* when kconsumerd command socket ready */
+	KCONSUMERD_SUCCESS_RECV_FD,	/* success on receiving fds */
+	KCONSUMERD_ERROR_RECV_FD,	/* error on receiving fds */
+	KCONSUMERD_POLL_ERROR,	/* Error in polling thread in kconsumerd */
+	KCONSUMERD_POLL_NVAL,	/* Poll on closed fd */
+	KCONSUMERD_POLL_HUP,	/* All fds have hungup */
+	KCONSUMERD_EXIT_SUCCESS,	/* kconsumerd exiting normally */
+	KCONSUMERD_EXIT_FAILURE,	/* kconsumerd exiting on error */
+	KCONSUMERD_OUTFD_ERROR,	/* error opening the tracefile */
+};
+
+/* 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
+ * Data structure received from lttng client to session daemon.
  */
 struct lttcomm_session_msg {
-	/* Common data to almost all command */
-	enum lttcomm_command_type cmd_type;
-	uuid_t session_id;
+	u32 cmd_type;    /* enum lttcomm_sessiond_command */
+	uuid_t session_uuid;
 	char trace_name[NAME_MAX];
 	char session_name[NAME_MAX];
-	pid_t pid;
+	u32 pid;    /* pid_t */
 	union {
 		struct {
 			int auto_session;
@@ -129,19 +155,39 @@ struct lttcomm_session_msg {
 };
 
 /*
- * 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.
+ * Data structure for the response from sessiond to the lttng client.
  */
 struct lttcomm_lttng_msg {
-	enum lttcomm_command_type cmd_type;
-	enum lttcomm_return_code ret_code;
-	uuid_t session_id;
-	pid_t pid;
-	char trace_name[NAME_MAX];
-	unsigned int size_payload;
+	u32 cmd_type;   /* enum lttcomm_sessiond_command */
+	u32 ret_code;   /* enum lttcomm_return_code */
+	u32 pid;        /* pid_t */
+	u32 trace_name_offset;
+	u32 data_size;
+	uuid_t session_uuid;
+	/* Contains: trace_name + data */
+	char payload[];
+};
+
+/*
+ * 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 {
+	u32 payload_size;
+	u32 cmd_type;	/* enum lttcomm_consumerd_command */
+	u32 ret_code;	/* enum lttcomm_return_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;
+	u32 state;    /* enum lttcomm_kconsumerd_fd_state */
+	unsigned long max_sb_size; /* the subbuffer size for this channel */
 };
 
 extern int lttcomm_create_unix_sock(const char *pathname);