-/* 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>
+/*
+ * 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
*/
#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,
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,
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];
};
/*
- * 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];
- unsigned int size_payload;
+ 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);