-/* 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
#include <limits.h>
#include <uuid/uuid.h>
+#include "lttng-share.h"
+
#define LTTNG_RUNDIR "/var/run/lttng"
/* Default unix socket path */
*/
#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,
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
+ * 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;
};
/*
- * 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 */
};
extern int lttcomm_create_unix_sock(const char *pathname);