--- /dev/null
+#ifndef _LTTNG_SESSIOND_COMM_H
+#define _LTTNG_SESSIOND_COMM_H
+
+/*
+ * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ * Julien Desfossez <julien.desfossez@polymtl.ca>
+ * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; only version 2
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * This header is meant for liblttng and libust internal use ONLY.
+ * These declarations should NOT be considered stable API.
+ */
+
+#include <limits.h>
+#include <lttng/lttng.h>
+
+/* Default unix socket path */
+#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"
+
+/* Queue size of listen(2) */
+#define MAX_LISTEN 10
+
+/* Get the error code index from 0 since
+ * LTTCOMM_OK start at 1000
+ */
+#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK)
+
+enum lttcomm_sessiond_command {
+ /* Tracer command */
+ LTTNG_ADD_CONTEXT,
+ LTTNG_DISABLE_CHANNEL,
+ LTTNG_DISABLE_EVENT,
+ LTTNG_DISABLE_ALL_EVENT,
+ LTTNG_ENABLE_CHANNEL,
+ LTTNG_ENABLE_EVENT,
+ LTTNG_ENABLE_ALL_EVENT,
+ /* Session daemon command */
+ LTTNG_CREATE_SESSION,
+ LTTNG_DESTROY_SESSION,
+ LTTNG_LIST_CHANNELS,
+ LTTNG_LIST_DOMAINS,
+ LTTNG_LIST_EVENTS,
+ LTTNG_LIST_SESSIONS,
+ LTTNG_LIST_TRACEPOINTS,
+ LTTNG_START_TRACE,
+ LTTNG_STOP_TRACE,
+ LTTNG_CALIBRATE,
+};
+
+/*
+ * lttcomm error code.
+ */
+enum lttcomm_return_code {
+ LTTCOMM_OK = 1000, /* Ok */
+ LTTCOMM_ERR, /* Unknown Error */
+ LTTCOMM_UND, /* Undefine command */
+ LTTCOMM_NOT_IMPLEMENTED, /* Command not implemented */
+ LTTCOMM_UNKNOWN_DOMAIN, /* Tracing domain not known */
+ LTTCOMM_ALLOC_FAIL, /* Trace allocation fail */
+ LTTCOMM_NO_SESSION, /* No session found */
+ 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_SESS_NOT_FOUND, /* Session name not found */
+ 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_NO_EVENT, /* No event found */
+ LTTCOMM_KERN_NA, /* Kernel tracer unavalable */
+ LTTCOMM_KERN_EVENT_EXIST, /* Kernel event already exists */
+ LTTCOMM_KERN_SESS_FAIL, /* Kernel create session failed */
+ LTTCOMM_KERN_CHAN_FAIL, /* Kernel create channel failed */
+ LTTCOMM_KERN_CHAN_NOT_FOUND, /* Kernel channel not found */
+ LTTCOMM_KERN_CHAN_DISABLE_FAIL, /* Kernel disable channel failed */
+ LTTCOMM_KERN_CHAN_ENABLE_FAIL, /* Kernel enable channel failed */
+ LTTCOMM_KERN_CONTEXT_FAIL, /* Kernel add context failed */
+ LTTCOMM_KERN_ENABLE_FAIL, /* Kernel enable event failed */
+ LTTCOMM_KERN_DISABLE_FAIL, /* Kernel disable event failed */
+ LTTCOMM_KERN_META_FAIL, /* Kernel open metadata failed */
+ LTTCOMM_KERN_START_FAIL, /* Kernel start trace failed */
+ LTTCOMM_KERN_STOP_FAIL, /* Kernel stop trace failed */
+ LTTCOMM_KERN_CONSUMER_FAIL, /* Kernel consumer start failed */
+ LTTCOMM_KERN_STREAM_FAIL, /* Kernel create stream failed */
+ LTTCOMM_KERN_DIR_FAIL, /* Kernel trace directory creation failed */
+ LTTCOMM_KERN_DIR_EXIST, /* Kernel trace directory exist */
+ LTTCOMM_KERN_NO_SESSION, /* No kernel session found */
+ LTTCOMM_KERN_LIST_FAIL, /* Kernel listing events failed */
+ 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 */
+ KCONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */
+ KCONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */
+ KCONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */
+ KCONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */
+ /* MUST be last element */
+ LTTCOMM_NR, /* Last element */
+};
+
+/*
+ * Data structure received from lttng client to session daemon.
+ */
+struct lttcomm_session_msg {
+ uint32_t cmd_type; /* enum lttcomm_sessiond_command */
+ struct lttng_session session;
+ struct lttng_domain domain;
+ union {
+ struct {
+ char channel_name[NAME_MAX];
+ char name[NAME_MAX];
+ } disable;
+ /* Event data */
+ struct {
+ char channel_name[NAME_MAX];
+ struct lttng_event event;
+ } enable;
+ /* Create channel */
+ struct {
+ struct lttng_channel chan;
+ } channel;
+ /* Context */
+ struct {
+ char channel_name[NAME_MAX];
+ char event_name[NAME_MAX];
+ struct lttng_event_context ctx;
+ } context;
+ /* List */
+ struct {
+ char channel_name[NAME_MAX];
+ } list;
+ struct lttng_calibrate calibrate;
+ } u;
+};
+
+/*
+ * Data structure for the response from sessiond to the lttng client.
+ */
+struct lttcomm_lttng_msg {
+ uint32_t cmd_type; /* enum lttcomm_sessiond_command */
+ uint32_t ret_code; /* enum lttcomm_return_code */
+ uint32_t pid; /* pid_t */
+ uint32_t data_size;
+ /* 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 {
+ uint32_t payload_size;
+ uint32_t cmd_type; /* enum kconsumerd_command */
+};
+
+/* 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;
+ uint32_t 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);
+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_send_fds_unix_sock(int sock, void *buf, int *fds,
+ size_t nb_fd, size_t len);
+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);
+
+#endif /* _LTTNG_SESSIOND_COMM_H */
projects / lttng-tools.git / blobdiff