/* Static functions */
static int check_existing_daemon(void);
-static int connect_app(pid_t pid);
+static int ust_connect_app(pid_t pid);
static int init_daemon_socket(void);
static int notify_apps(const char* name);
static int process_client_msg(int sock, struct lttcomm_session_msg*);
static int send_unix_sock(int sock, void *buf, size_t len);
static int set_signal_handler(void);
-static int set_socket_perms(void);
-static int setup_data_buffer(char **buf, size_t size, struct lttcomm_lttng_msg *llm);
+static int set_permissions(void);
+static int setup_data_buffer(char **buf, size_t size, struct lttcomm_lttng_header *llh);
+static int create_lttng_rundir(void);
+static int set_kconsumerd_sockets(void);
static void cleanup(void);
-static void copy_common_data(struct lttcomm_lttng_msg *llm, struct lttcomm_session_msg *lsm);
+static void copy_common_data(struct lttcomm_lttng_header *llh, struct lttcomm_session_msg *lsm);
static void sighandler(int sig);
static void *thread_manage_clients(void *data);
static void *thread_manage_apps(void *data);
+static void *thread_manage_kconsumerd(void *data);
/* Variables */
int opt_verbose;
static int is_root; /* Set to 1 if the daemon is running as root */
static pid_t ppid;
-static char apps_unix_sock_path[PATH_MAX]; /* Global application Unix socket path */
-static char client_unix_sock_path[PATH_MAX]; /* Global client Unix socket path */
+static char apps_unix_sock_path[PATH_MAX]; /* Global application Unix socket path */
+static char client_unix_sock_path[PATH_MAX]; /* Global client Unix socket path */
+static char kconsumerd_err_unix_sock_path[PATH_MAX]; /* kconsumerd error Unix socket path */
+static char kconsumerd_cmd_unix_sock_path[PATH_MAX]; /* kconsumerd command Unix socket path */
-static int client_socket;
-static int apps_socket;
+static int client_sock;
+static int apps_sock;
+static int kconsumerd_err_sock;
-static struct ltt_session *current_session;
+/* Extern in session.h */
+struct ltt_session *current_session;
+
+/*
+ * thread_manage_kconsumerd
+ *
+ * This thread manage the kconsumerd error sent
+ * back to the session daemon.
+ */
+static void *thread_manage_kconsumerd(void *data)
+{
+ int sock, ret;
+
+ DBG("[thread] Manage kconsumerd started");
+
+ ret = lttcomm_listen_unix_sock(kconsumerd_err_sock);
+ if (ret < 0) {
+ goto error;
+ }
+
+ sock = lttcomm_accept_unix_sock(kconsumerd_err_sock);
+ if (sock < 0) {
+ goto error;
+ }
+
+ while (1) {
+ //ret = lttcomm_recv_unix_sock(sock, &lsm, sizeof(lsm));
+ if (ret <= 0) {
+ /* TODO: Consumerd died? */
+ continue;
+ }
+ }
+
+error:
+ return NULL;
+}
/*
* thread_manage_apps
/* Notify all applications to register */
notify_apps(default_global_apps_pipe);
- ret = lttcomm_listen_unix_sock(apps_socket);
+ ret = lttcomm_listen_unix_sock(apps_sock);
if (ret < 0) {
goto error;
}
while (1) {
/* Blocking call, waiting for transmission */
- sock = lttcomm_accept_unix_sock(apps_socket);
+ sock = lttcomm_accept_unix_sock(apps_sock);
if (sock < 0) {
goto error;
}
DBG("[thread] Manage client started");
- ret = lttcomm_listen_unix_sock(client_socket);
+ ret = lttcomm_listen_unix_sock(client_sock);
if (ret < 0) {
goto error;
}
while (1) {
/* Blocking call, waiting for transmission */
- sock = lttcomm_accept_unix_sock(client_socket);
+ sock = lttcomm_accept_unix_sock(client_sock);
if (sock < 0) {
goto error;
}
/* This function dispatch the work to the LTTng or UST libs
* and then sends back the response to the client. This is needed
- * because there might be more then one lttcomm_lttng_msg to
+ * because there might be more then one lttcomm_lttng_header to
* send out so process_client_msg do both jobs.
*/
ret = process_client_msg(sock, &lsm);
}
/*
- * connect_app
+ * ust_connect_app
*
* Return a socket connected to the libust communication socket
* of the application identified by the pid.
* If the pid is not found in the traceable list,
* return -1 to indicate error.
*/
-static int connect_app(pid_t pid)
+static int ust_connect_app(pid_t pid)
{
int sock;
struct ltt_traceable_app *lta;
lta = find_app_by_pid(pid);
if (lta == NULL) {
/* App not found */
+ DBG("Application pid %d not found", pid);
return -1;
}
return ret;
}
-/*
- * ust_create_trace
- *
- * Create an userspace trace using pid.
- * This trace is then appended to the current session
- * ust trace list.
- */
-static int ust_create_trace(pid_t pid)
-{
- int sock, ret;
- struct ltt_ust_trace *trace;
-
- DBG("Creating trace for pid %d", pid);
-
- trace = malloc(sizeof(struct ltt_ust_trace));
- if (trace == NULL) {
- perror("malloc");
- ret = -1;
- goto error;
- }
-
- /* Init */
- trace->pid = pid;
- trace->shmid = 0;
- /* NOTE: to be removed. Trace name will no longer be
- * required for LTTng userspace tracer. For now, we set it
- * to 'auto' for API compliance.
- */
- snprintf(trace->name, 5, "auto");
-
- /* Connect to app using ustctl API */
- sock = connect_app(pid);
- if (sock < 0) {
- ret = LTTCOMM_NO_TRACEABLE;
- goto error;
- }
-
- ret = ustctl_create_trace(sock, trace->name);
- if (ret < 0) {
- ret = LTTCOMM_CREATE_FAIL;
- goto error;
- }
-
- /* Check if current session is valid */
- if (current_session) {
- cds_list_add(&trace->list, ¤t_session->ust_traces);
- current_session->ust_trace_count++;
- }
-
-error:
- return ret;
-}
-
-/*
- * ust_start_trace
- *
- * Start a trace. This trace, identified by the pid, must be
- * in the current session ust_traces list.
- */
-static int ust_start_trace(pid_t pid)
-{
- int sock, ret;
- struct ltt_ust_trace *trace;
-
- DBG("Starting trace for pid %d", pid);
-
- trace = find_session_ust_trace_by_pid(current_session, pid);
- if (trace == NULL) {
- ret = LTTCOMM_NO_TRACE;
- goto error;
- }
-
- /* Connect to app using ustctl API */
- sock = connect_app(pid);
- if (sock < 0) {
- ret = LTTCOMM_NO_TRACEABLE;
- goto error;
- }
-
- ret = ustctl_start_trace(sock, "auto");
- if (ret < 0) {
- ret = LTTCOMM_START_FAIL;
- goto error;
- }
-
-error:
- return ret;
-}
-
-/*
- * ust_stop_trace
- *
- * Stop a trace. This trace, identified by the pid, must be
- * in the current session ust_traces list.
- */
-static int ust_stop_trace(pid_t pid)
-{
- int sock, ret;
- struct ltt_ust_trace *trace;
-
- DBG("Stopping trace for pid %d", pid);
-
- trace = find_session_ust_trace_by_pid(current_session, pid);
- if (trace == NULL) {
- ret = LTTCOMM_NO_TRACE;
- goto error;
- }
-
- /* Connect to app using ustctl API */
- sock = connect_app(pid);
- if (sock < 0) {
- ret = LTTCOMM_NO_TRACEABLE;
- goto error;
- }
-
- ret = ustctl_stop_trace(sock, trace->name);
- if (ret < 0) {
- ret = LTTCOMM_STOP_FAIL;
- goto error;
- }
-
-error:
- return ret;
-}
-
/*
* copy_common_data
*
- * Copy common data between lttcomm_lttng_msg and lttcomm_session_msg
+ * Copy common data between lttcomm_lttng_header and lttcomm_session_msg
*/
-static void copy_common_data(struct lttcomm_lttng_msg *llm, struct lttcomm_session_msg *lsm)
+static void copy_common_data(struct lttcomm_lttng_header *llh, struct lttcomm_session_msg *lsm)
{
- llm->cmd_type = lsm->cmd_type;
- llm->pid = lsm->pid;
+ llh->cmd_type = lsm->cmd_type;
+ llh->pid = lsm->pid;
/* Manage uuid */
if (!uuid_is_null(lsm->session_id)) {
- uuid_copy(llm->session_id, lsm->session_id);
+ uuid_copy(llh->session_id, lsm->session_id);
}
- strncpy(llm->trace_name, lsm->trace_name, strlen(llm->trace_name));
- llm->trace_name[strlen(llm->trace_name) - 1] = '\0';
+ strncpy(llh->trace_name, lsm->trace_name, strlen(llh->trace_name));
+ llh->trace_name[strlen(llh->trace_name) - 1] = '\0';
}
/*
*
* Return total size of the buffer pointed by buf.
*/
-static int setup_data_buffer(char **buf, size_t s_data, struct lttcomm_lttng_msg *llm)
+static int setup_data_buffer(char **buf, size_t s_data, struct lttcomm_lttng_header *llh)
{
int ret = 0;
size_t buf_size;
- buf_size = sizeof(struct lttcomm_lttng_msg) + s_data;
+ buf_size = sizeof(struct lttcomm_lttng_header) + s_data;
*buf = malloc(buf_size);
if (*buf == NULL) {
perror("malloc");
goto error;
}
- /* Setup lttcomm_lttng_msg data and copy
+ /* Setup lttcomm_lttng_header data and copy
* it to the newly allocated buffer.
*/
- llm->size_payload = s_data;
- memcpy(*buf, llm, sizeof(struct lttcomm_lttng_msg));
+ llh->payload_size = s_data;
+ memcpy(*buf, llh, sizeof(struct lttcomm_lttng_header));
return buf_size;
*/
static int process_client_msg(int sock, struct lttcomm_session_msg *lsm)
{
- int ret;
- int buf_size;
+ int ust_sock, ret, buf_size;
size_t header_size;
char *send_buf = NULL;
- struct lttcomm_lttng_msg llm;
+ struct lttcomm_lttng_header llh;
DBG("Processing client message");
/* Copy common data to identify the response
* on the lttng client side.
*/
- copy_common_data(&llm, lsm);
+ copy_common_data(&llh, lsm);
/* Check command that needs a session */
if (lsm->cmd_type != LTTNG_CREATE_SESSION &&
/* Default return code.
* In our world, everything is OK... right? ;)
*/
- llm.ret_code = LTTCOMM_OK;
+ llh.ret_code = LTTCOMM_OK;
+
+ header_size = sizeof(struct lttcomm_lttng_header);
- header_size = sizeof(struct lttcomm_lttng_msg);
+ /* Connect to ust apps if available pid */
+ if (lsm->pid != 0) {
+ /* Connect to app using ustctl API */
+ ust_sock = ust_connect_app(lsm->pid);
+ if (ust_sock < 0) {
+ ret = LTTCOMM_NO_TRACEABLE;
+ goto end;
+ }
+ }
/* Process by command type */
switch (lsm->cmd_type) {
case LTTNG_CREATE_SESSION:
{
- ret = create_session(lsm->session_name, &llm.session_id);
+ ret = create_session(lsm->session_name, &llh.session_id);
if (ret < 0) {
if (ret == -1) {
ret = LTTCOMM_EXIST_SESS;
goto end;
}
- buf_size = setup_data_buffer(&send_buf, 0, &llm);
+ buf_size = setup_data_buffer(&send_buf, 0, &llh);
if (buf_size < 0) {
ret = LTTCOMM_FATAL;
goto end;
ret = LTTCOMM_OK;
}
- /* No auxiliary data so only send the llm struct. */
+ /* No auxiliary data so only send the llh struct. */
goto end;
}
case LTTNG_LIST_TRACES:
}
buf_size = setup_data_buffer(&send_buf,
- sizeof(struct lttng_trace) * trace_count, &llm);
+ sizeof(struct lttng_trace) * trace_count, &llh);
if (buf_size < 0) {
ret = LTTCOMM_FATAL;
goto end;
}
case UST_CREATE_TRACE:
{
- ret = ust_create_trace(lsm->pid);
+ ret = ust_create_trace(ust_sock, lsm->pid);
if (ret < 0) {
/* If -1 is returned from ust_create_trace, malloc
* failed so it's pretty much a fatal error.
goto end;
}
- /* No auxiliary data so only send the llm struct. */
+ /* No auxiliary data so only send the llh struct. */
goto end;
}
case UST_LIST_APPS:
/* Setup data buffer and details for transmission */
buf_size = setup_data_buffer(&send_buf,
- sizeof(pid_t) * app_count, &llm);
+ sizeof(pid_t) * app_count, &llh);
if (buf_size < 0) {
ret = LTTCOMM_FATAL;
goto end;
}
case UST_START_TRACE:
{
- ret = ust_start_trace(lsm->pid);
+ ret = ust_start_trace(ust_sock, lsm->pid);
- /* No auxiliary data so only send the llm struct. */
+ /* No auxiliary data so only send the llh struct. */
goto end;
}
case UST_STOP_TRACE:
{
- ret = ust_stop_trace(lsm->pid);
+ ret = ust_stop_trace(ust_sock, lsm->pid);
- /* No auxiliary data so only send the llm struct. */
+ /* No auxiliary data so only send the llh struct. */
goto end;
}
case LTTNG_LIST_SESSIONS:
/* Setup data buffer and details for transmission */
buf_size = setup_data_buffer(&send_buf,
- (sizeof(struct lttng_session) * session_count), &llm);
+ (sizeof(struct lttng_session) * session_count), &llh);
if (buf_size < 0) {
ret = LTTCOMM_FATAL;
goto end;
return ret;
end:
+ DBG("Return code to client %d", ret);
/* Notify client of error */
- llm.ret_code = ret;
- llm.size_payload = 0;
- send_unix_sock(sock, (void*) &llm, sizeof(llm));
+ llh.ret_code = ret;
+ llh.payload_size = 0;
+ send_unix_sock(sock, (void*) &llh, sizeof(llh));
return ret;
}
static void usage(void)
{
fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname);
- fprintf(stderr, " -h, --help Display this usage.\n");
- fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n");
- fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket.\n");
- fprintf(stderr, " -d, --daemonize Start as a daemon.\n");
- fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n");
- fprintf(stderr, " -V, --version Show version number.\n");
- fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n");
- fprintf(stderr, " -q, --quiet No output at all.\n");
- fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n");
+ fprintf(stderr, " -h, --help Display this usage.\n");
+ fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n");
+ fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n");
+ fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n");
+ fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n");
+ fprintf(stderr, " -d, --daemonize Start as a daemon.\n");
+ fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n");
+ fprintf(stderr, " -V, --version Show version number.\n");
+ fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n");
+ fprintf(stderr, " -q, --quiet No output at all.\n");
+ fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n");
}
/*
static struct option long_options[] = {
{ "client-sock", 1, 0, 'c' },
{ "apps-sock", 1, 0, 'a' },
+ { "kconsumerd-cmd-sock", 1, 0, 0 },
+ { "kconsumerd-err-sock", 1, 0, 0 },
{ "daemonize", 0, 0, 'd' },
{ "sig-parent", 0, 0, 'S' },
{ "help", 0, 0, 'h' },
while (1) {
int option_index = 0;
- c = getopt_long(argc, argv, "dhqvVS" "a:c:g:s:", long_options, &option_index);
+ c = getopt_long(argc, argv, "dhqvVS" "a:c:g:s:E:C:", long_options, &option_index);
if (c == -1) {
break;
}
case 'S':
opt_sig_parent = 1;
break;
+ case 'E':
+ snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, "%s", optarg);
+ break;
+ case 'C':
+ snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, "%s", optarg);
+ break;
case 'q':
opt_quiet = 1;
break;
* init_daemon_socket
*
* Creates the two needed socket by the daemon.
- * apps_socket - The communication socket for all UST apps.
- * client_socket - The communication of the cli tool (lttng).
+ * apps_sock - The communication socket for all UST apps.
+ * client_sock - The communication of the cli tool (lttng).
*/
static int init_daemon_socket()
{
old_umask = umask(0);
/* Create client tool unix socket */
- client_socket = lttcomm_create_unix_sock(client_unix_sock_path);
- if (client_socket < 0) {
+ client_sock = lttcomm_create_unix_sock(client_unix_sock_path);
+ if (client_sock < 0) {
+ ERR("Create unix sock failed: %s", client_unix_sock_path);
ret = -1;
goto end;
}
/* File permission MUST be 660 */
ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
if (ret < 0) {
+ ERR("Set file permissions failed: %s", client_unix_sock_path);
perror("chmod");
goto end;
}
/* Create the application unix socket */
- apps_socket = lttcomm_create_unix_sock(apps_unix_sock_path);
- if (apps_socket < 0) {
+ apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path);
+ if (apps_sock < 0) {
+ ERR("Create unix sock failed: %s", apps_unix_sock_path);
ret = -1;
goto end;
}
- /* File permission MUST be 660 */
+ /* File permission MUST be 666 */
ret = chmod(apps_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
if (ret < 0) {
+ ERR("Set file permissions failed: %s", apps_unix_sock_path);
perror("chmod");
goto end;
}
}
/*
- * set_socket_perms
+ * set_permissions
*
* Set the tracing group gid onto the client socket.
*/
-static int set_socket_perms(void)
+static int set_permissions(void)
{
int ret;
struct group *grp;
goto end;
}
+ /* Set lttng run dir */
+ ret = chown(LTTNG_RUNDIR, 0, grp->gr_gid);
+ if (ret < 0) {
+ ERR("Unable to set group on " LTTNG_RUNDIR);
+ perror("chown");
+ }
+
+ /* lttng client socket path */
ret = chown(client_unix_sock_path, 0, grp->gr_gid);
if (ret < 0) {
+ ERR("Unable to set group on %s", client_unix_sock_path);
+ perror("chown");
+ }
+
+ /* kconsumerd error socket path */
+ ret = chown(kconsumerd_err_unix_sock_path, 0, grp->gr_gid);
+ if (ret < 0) {
+ ERR("Unable to set group on %s", kconsumerd_err_unix_sock_path);
perror("chown");
}
- DBG("Sockets permissions set");
+ DBG("All permissions are set");
end:
return ret;
}
+/*
+ * create_lttng_rundir
+ *
+ * Create the lttng run directory needed for all
+ * global sockets and pipe.
+ */
+static int create_lttng_rundir(void)
+{
+ int ret;
+
+ ret = mkdir(LTTNG_RUNDIR, S_IRWXU | S_IRWXG );
+ if (ret < 0) {
+ ERR("Unable to create " LTTNG_RUNDIR);
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
+/*
+ * set_kconsumerd_sockets
+ *
+ * Setup sockets and directory needed by the kconsumerd
+ * communication with the session daemon.
+ */
+static int set_kconsumerd_sockets(void)
+{
+ int ret;
+
+ if (strlen(kconsumerd_err_unix_sock_path) == 0) {
+ snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, KCONSUMERD_ERR_SOCK_PATH);
+ }
+
+ if (strlen(kconsumerd_cmd_unix_sock_path) == 0) {
+ snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, KCONSUMERD_CMD_SOCK_PATH);
+ }
+
+ ret = mkdir(KCONSUMERD_PATH, S_IRWXU | S_IRWXG);
+ if (ret < 0) {
+ ERR("Failed to create " KCONSUMERD_PATH);
+ goto error;
+ }
+
+ /* Create the kconsumerd error unix socket */
+ kconsumerd_err_sock = lttcomm_create_unix_sock(kconsumerd_err_unix_sock_path);
+ if (kconsumerd_err_sock < 0) {
+ ERR("Create unix sock failed: %s", kconsumerd_err_unix_sock_path);
+ ret = -1;
+ goto error;
+ }
+
+ /* File permission MUST be 660 */
+ ret = chmod(kconsumerd_err_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
+ if (ret < 0) {
+ ERR("Set file permissions failed: %s", kconsumerd_err_unix_sock_path);
+ perror("chmod");
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
/*
* set_signal_handler
*
*/
static void cleanup()
{
+ int ret;
+ char *cmd;
+
DBG("Cleaning up");
/* <fun> */
unlink(client_unix_sock_path);
unlink(apps_unix_sock_path);
+ unlink(kconsumerd_err_unix_sock_path);
+
+ ret = asprintf(&cmd, "rm -rf " LTTNG_RUNDIR);
+ if (ret < 0) {
+ ERR("asprintf failed. Something is really wrong!");
+ }
+
+ /* Remove lttng run directory */
+ ret = system(cmd);
+ if (ret < 0) {
+ ERR("Unable to clean " LTTNG_RUNDIR);
+ }
}
/*
/* Set all sockets path */
if (is_root) {
+ ret = create_lttng_rundir();
+ if (ret < 0) {
+ goto error;
+ }
+
if (strlen(apps_unix_sock_path) == 0) {
- (snprintf(apps_unix_sock_path, PATH_MAX,
- DEFAULT_GLOBAL_APPS_UNIX_SOCK));
+ snprintf(apps_unix_sock_path, PATH_MAX,
+ DEFAULT_GLOBAL_APPS_UNIX_SOCK);
}
if (strlen(client_unix_sock_path) == 0) {
- (snprintf(client_unix_sock_path, PATH_MAX,
- DEFAULT_GLOBAL_CLIENT_UNIX_SOCK));
+ snprintf(client_unix_sock_path, PATH_MAX,
+ DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
+ }
+
+ ret = set_kconsumerd_sockets();
+ if (ret < 0) {
+ goto error;
}
} else {
if (strlen(apps_unix_sock_path) == 0) {
- (snprintf(apps_unix_sock_path, PATH_MAX,
- DEFAULT_HOME_APPS_UNIX_SOCK, get_home_dir()));
+ snprintf(apps_unix_sock_path, PATH_MAX,
+ DEFAULT_HOME_APPS_UNIX_SOCK, get_home_dir());
}
/* Set the cli tool unix socket path */
if (strlen(client_unix_sock_path) == 0) {
- (snprintf(client_unix_sock_path, PATH_MAX,
- DEFAULT_HOME_CLIENT_UNIX_SOCK, get_home_dir()));
+ snprintf(client_unix_sock_path, PATH_MAX,
+ DEFAULT_HOME_CLIENT_UNIX_SOCK, get_home_dir());
}
}
if ((ret = check_existing_daemon()) == 0) {
ERR("Already running daemon.\n");
/* We do not goto error because we must not
- * cleanup() because a daemon is already working.
+ * cleanup() because a daemon is already running.
*/
return EXIT_FAILURE;
}
goto error;
}
- /* Setup the two needed unix socket */
+ /* Setup the needed unix socket */
if (init_daemon_socket() < 0) {
goto error;
}
/* Set credentials to socket */
- if (is_root && (set_socket_perms() < 0)) {
+ if (is_root && (set_permissions() < 0)) {
goto error;
}
projects / lttng-tools.git / blobdiff