+++ /dev/null
-/*
- * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com>
- * David Goulet <dgoulet@efficios.com>
- * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
- * 2015 - 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, version 2 only,
- * as published by the Free Software Foundation.
- *
- * 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.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#define _LGPL_SOURCE
-#include <getopt.h>
-#include <grp.h>
-#include <limits.h>
-#include <pthread.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/mount.h>
-#include <sys/resource.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <inttypes.h>
-#include <urcu/futex.h>
-#include <urcu/uatomic.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-#include <lttng/lttng.h>
-#include <common/common.h>
-#include <common/compat/poll.h>
-#include <common/compat/socket.h>
-#include <common/compat/endian.h>
-#include <common/compat/getenv.h>
-#include <common/defaults.h>
-#include <common/daemonize.h>
-#include <common/futex.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-#include <common/sessiond-comm/inet.h>
-#include <common/sessiond-comm/relayd.h>
-#include <common/uri.h>
-#include <common/utils.h>
-#include <common/align.h>
-#include <common/config/session-config.h>
-#include <common/dynamic-buffer.h>
-#include <common/buffer-view.h>
-#include <urcu/rculist.h>
-
-#include "cmd.h"
-#include "ctf-trace.h"
-#include "index.h"
-#include "utils.h"
-#include "lttng-relayd.h"
-#include "live.h"
-#include "health-relayd.h"
-#include "testpoint.h"
-#include "viewer-stream.h"
-#include "session.h"
-#include "stream.h"
-#include "connection.h"
-#include "tracefile-array.h"
-#include "tcp_keep_alive.h"
-
-static const char *help_msg =
-#ifdef LTTNG_EMBED_HELP
-#include <lttng-relayd.8.h>
-#else
-NULL
-#endif
-;
-
-enum relay_connection_status {
- RELAY_CONNECTION_STATUS_OK,
- /* An error occured while processing an event on the connection. */
- RELAY_CONNECTION_STATUS_ERROR,
- /* Connection closed/shutdown cleanly. */
- RELAY_CONNECTION_STATUS_CLOSED,
-};
-
-/* command line options */
-char *opt_output_path;
-static int opt_daemon, opt_background;
-
-/*
- * We need to wait for listener and live listener threads, as well as
- * health check thread, before being ready to signal readiness.
- */
-#define NR_LTTNG_RELAY_READY 3
-static int lttng_relay_ready = NR_LTTNG_RELAY_READY;
-
-/* Size of receive buffer. */
-#define RECV_DATA_BUFFER_SIZE 65536
-#define FILE_COPY_BUFFER_SIZE 65536
-
-static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */
-static pid_t child_ppid; /* Internal parent PID use with daemonize. */
-
-static struct lttng_uri *control_uri;
-static struct lttng_uri *data_uri;
-static struct lttng_uri *live_uri;
-
-const char *progname;
-
-const char *tracing_group_name = DEFAULT_TRACING_GROUP;
-static int tracing_group_name_override;
-
-const char * const config_section_name = "relayd";
-
-/*
- * Quit pipe for all threads. This permits a single cancellation point
- * for all threads when receiving an event on the pipe.
- */
-int thread_quit_pipe[2] = { -1, -1 };
-
-/*
- * This pipe is used to inform the worker thread that a command is queued and
- * ready to be processed.
- */
-static int relay_conn_pipe[2] = { -1, -1 };
-
-/* Shared between threads */
-static int dispatch_thread_exit;
-
-static pthread_t listener_thread;
-static pthread_t dispatcher_thread;
-static pthread_t worker_thread;
-static pthread_t health_thread;
-
-/*
- * last_relay_stream_id_lock protects last_relay_stream_id increment
- * atomicity on 32-bit architectures.
- */
-static pthread_mutex_t last_relay_stream_id_lock = PTHREAD_MUTEX_INITIALIZER;
-static uint64_t last_relay_stream_id;
-
-/*
- * Relay command queue.
- *
- * The relay_thread_listener and relay_thread_dispatcher communicate with this
- * queue.
- */
-static struct relay_conn_queue relay_conn_queue;
-
-/* Global relay stream hash table. */
-struct lttng_ht *relay_streams_ht;
-
-/* Global relay viewer stream hash table. */
-struct lttng_ht *viewer_streams_ht;
-
-/* Global relay sessions hash table. */
-struct lttng_ht *sessions_ht;
-
-/* Relayd health monitoring */
-struct health_app *health_relayd;
-
-static struct option long_options[] = {
- { "control-port", 1, 0, 'C', },
- { "data-port", 1, 0, 'D', },
- { "live-port", 1, 0, 'L', },
- { "daemonize", 0, 0, 'd', },
- { "background", 0, 0, 'b', },
- { "group", 1, 0, 'g', },
- { "help", 0, 0, 'h', },
- { "output", 1, 0, 'o', },
- { "verbose", 0, 0, 'v', },
- { "config", 1, 0, 'f' },
- { "version", 0, 0, 'V' },
- { NULL, 0, 0, 0, },
-};
-
-static const char *config_ignore_options[] = { "help", "config", "version" };
-
-/*
- * Take an option from the getopt output and set it in the right variable to be
- * used later.
- *
- * Return 0 on success else a negative value.
- */
-static int set_option(int opt, const char *arg, const char *optname)
-{
- int ret;
-
- switch (opt) {
- case 0:
- fprintf(stderr, "option %s", optname);
- if (arg) {
- fprintf(stderr, " with arg %s\n", arg);
- }
- break;
- case 'C':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-C, --control-port");
- } else {
- ret = uri_parse(arg, &control_uri);
- if (ret < 0) {
- ERR("Invalid control URI specified");
- goto end;
- }
- if (control_uri->port == 0) {
- control_uri->port = DEFAULT_NETWORK_CONTROL_PORT;
- }
- }
- break;
- case 'D':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-D, -data-port");
- } else {
- ret = uri_parse(arg, &data_uri);
- if (ret < 0) {
- ERR("Invalid data URI specified");
- goto end;
- }
- if (data_uri->port == 0) {
- data_uri->port = DEFAULT_NETWORK_DATA_PORT;
- }
- }
- break;
- case 'L':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-L, -live-port");
- } else {
- ret = uri_parse(arg, &live_uri);
- if (ret < 0) {
- ERR("Invalid live URI specified");
- goto end;
- }
- if (live_uri->port == 0) {
- live_uri->port = DEFAULT_NETWORK_VIEWER_PORT;
- }
- }
- break;
- case 'd':
- opt_daemon = 1;
- break;
- case 'b':
- opt_background = 1;
- break;
- case 'g':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-g, --group");
- } else {
- tracing_group_name = strdup(arg);
- if (tracing_group_name == NULL) {
- ret = -errno;
- PERROR("strdup");
- goto end;
- }
- tracing_group_name_override = 1;
- }
- break;
- case 'h':
- ret = utils_show_help(8, "lttng-relayd", help_msg);
- if (ret) {
- ERR("Cannot show --help for `lttng-relayd`");
- perror("exec");
- }
- exit(EXIT_FAILURE);
- case 'V':
- fprintf(stdout, "%s\n", VERSION);
- exit(EXIT_SUCCESS);
- case 'o':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-o, --output");
- } else {
- ret = asprintf(&opt_output_path, "%s", arg);
- if (ret < 0) {
- ret = -errno;
- PERROR("asprintf opt_output_path");
- goto end;
- }
- }
- break;
- case 'v':
- /* Verbose level can increase using multiple -v */
- if (arg) {
- lttng_opt_verbose = config_parse_value(arg);
- } else {
- /* Only 3 level of verbosity (-vvv). */
- if (lttng_opt_verbose < 3) {
- lttng_opt_verbose += 1;
- }
- }
- break;
- default:
- /* Unknown option or other error.
- * Error is printed by getopt, just return */
- ret = -1;
- goto end;
- }
-
- /* All good. */
- ret = 0;
-
-end:
- return ret;
-}
-
-/*
- * config_entry_handler_cb used to handle options read from a config file.
- * See config_entry_handler_cb comment in common/config/session-config.h for the
- * return value conventions.
- */
-static int config_entry_handler(const struct config_entry *entry, void *unused)
-{
- int ret = 0, i;
-
- if (!entry || !entry->name || !entry->value) {
- ret = -EINVAL;
- goto end;
- }
-
- /* Check if the option is to be ignored */
- for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) {
- if (!strcmp(entry->name, config_ignore_options[i])) {
- goto end;
- }
- }
-
- for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) {
- /* Ignore if entry name is not fully matched. */
- if (strcmp(entry->name, long_options[i].name)) {
- continue;
- }
-
- /*
- * If the option takes no argument on the command line,
- * we have to check if the value is "true". We support
- * non-zero numeric values, true, on and yes.
- */
- if (!long_options[i].has_arg) {
- ret = config_parse_value(entry->value);
- if (ret <= 0) {
- if (ret) {
- WARN("Invalid configuration value \"%s\" for option %s",
- entry->value, entry->name);
- }
- /* False, skip boolean config option. */
- goto end;
- }
- }
-
- ret = set_option(long_options[i].val, entry->value, entry->name);
- goto end;
- }
-
- WARN("Unrecognized option \"%s\" in daemon configuration file.",
- entry->name);
-
-end:
- return ret;
-}
-
-static int set_options(int argc, char **argv)
-{
- int c, ret = 0, option_index = 0, retval = 0;
- int orig_optopt = optopt, orig_optind = optind;
- char *default_address, *optstring;
- const char *config_path = NULL;
-
- optstring = utils_generate_optstring(long_options,
- sizeof(long_options) / sizeof(struct option));
- if (!optstring) {
- retval = -ENOMEM;
- goto exit;
- }
-
- /* Check for the --config option */
-
- while ((c = getopt_long(argc, argv, optstring, long_options,
- &option_index)) != -1) {
- if (c == '?') {
- retval = -EINVAL;
- goto exit;
- } else if (c != 'f') {
- continue;
- }
-
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-f, --config");
- } else {
- config_path = utils_expand_path(optarg);
- if (!config_path) {
- ERR("Failed to resolve path: %s", optarg);
- }
- }
- }
-
- ret = config_get_section_entries(config_path, config_section_name,
- config_entry_handler, NULL);
- if (ret) {
- if (ret > 0) {
- ERR("Invalid configuration option at line %i", ret);
- }
- retval = -1;
- goto exit;
- }
-
- /* Reset getopt's global state */
- optopt = orig_optopt;
- optind = orig_optind;
- while (1) {
- c = getopt_long(argc, argv, optstring, long_options, &option_index);
- if (c == -1) {
- break;
- }
-
- ret = set_option(c, optarg, long_options[option_index].name);
- if (ret < 0) {
- retval = -1;
- goto exit;
- }
- }
-
- /* assign default values */
- if (control_uri == NULL) {
- ret = asprintf(&default_address,
- "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d",
- DEFAULT_NETWORK_CONTROL_PORT);
- if (ret < 0) {
- PERROR("asprintf default data address");
- retval = -1;
- goto exit;
- }
-
- ret = uri_parse(default_address, &control_uri);
- free(default_address);
- if (ret < 0) {
- ERR("Invalid control URI specified");
- retval = -1;
- goto exit;
- }
- }
- if (data_uri == NULL) {
- ret = asprintf(&default_address,
- "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d",
- DEFAULT_NETWORK_DATA_PORT);
- if (ret < 0) {
- PERROR("asprintf default data address");
- retval = -1;
- goto exit;
- }
-
- ret = uri_parse(default_address, &data_uri);
- free(default_address);
- if (ret < 0) {
- ERR("Invalid data URI specified");
- retval = -1;
- goto exit;
- }
- }
- if (live_uri == NULL) {
- ret = asprintf(&default_address,
- "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d",
- DEFAULT_NETWORK_VIEWER_PORT);
- if (ret < 0) {
- PERROR("asprintf default viewer control address");
- retval = -1;
- goto exit;
- }
-
- ret = uri_parse(default_address, &live_uri);
- free(default_address);
- if (ret < 0) {
- ERR("Invalid viewer control URI specified");
- retval = -1;
- goto exit;
- }
- }
-
-exit:
- free(optstring);
- return retval;
-}
-
-static void print_global_objects(void)
-{
- rcu_register_thread();
-
- print_viewer_streams();
- print_relay_streams();
- print_sessions();
-
- rcu_unregister_thread();
-}
-
-/*
- * Cleanup the daemon
- */
-static void relayd_cleanup(void)
-{
- print_global_objects();
-
- DBG("Cleaning up");
-
- if (viewer_streams_ht)
- lttng_ht_destroy(viewer_streams_ht);
- if (relay_streams_ht)
- lttng_ht_destroy(relay_streams_ht);
- if (sessions_ht)
- lttng_ht_destroy(sessions_ht);
-
- /* free the dynamically allocated opt_output_path */
- free(opt_output_path);
-
- /* Close thread quit pipes */
- utils_close_pipe(thread_quit_pipe);
-
- uri_free(control_uri);
- uri_free(data_uri);
- /* Live URI is freed in the live thread. */
-
- if (tracing_group_name_override) {
- free((void *) tracing_group_name);
- }
-}
-
-/*
- * Write to writable pipe used to notify a thread.
- */
-static int notify_thread_pipe(int wpipe)
-{
- ssize_t ret;
-
- ret = lttng_write(wpipe, "!", 1);
- if (ret < 1) {
- PERROR("write poll pipe");
- goto end;
- }
- ret = 0;
-end:
- return ret;
-}
-
-static int notify_health_quit_pipe(int *pipe)
-{
- ssize_t ret;
-
- ret = lttng_write(pipe[1], "4", 1);
- if (ret < 1) {
- PERROR("write relay health quit");
- goto end;
- }
- ret = 0;
-end:
- return ret;
-}
-
-/*
- * Stop all relayd and relayd-live threads.
- */
-int lttng_relay_stop_threads(void)
-{
- int retval = 0;
-
- /* Stopping all threads */
- DBG("Terminating all threads");
- if (notify_thread_pipe(thread_quit_pipe[1])) {
- ERR("write error on thread quit pipe");
- retval = -1;
- }
-
- if (notify_health_quit_pipe(health_quit_pipe)) {
- ERR("write error on health quit pipe");
- }
-
- /* Dispatch thread */
- CMM_STORE_SHARED(dispatch_thread_exit, 1);
- futex_nto1_wake(&relay_conn_queue.futex);
-
- if (relayd_live_stop()) {
- ERR("Error stopping live threads");
- retval = -1;
- }
- return retval;
-}
-
-/*
- * Signal handler for the daemon
- *
- * Simply stop all worker threads, leaving main() return gracefully after
- * joining all threads and calling cleanup().
- */
-static void sighandler(int sig)
-{
- switch (sig) {
- case SIGINT:
- DBG("SIGINT caught");
- if (lttng_relay_stop_threads()) {
- ERR("Error stopping threads");
- }
- break;
- case SIGTERM:
- DBG("SIGTERM caught");
- if (lttng_relay_stop_threads()) {
- ERR("Error stopping threads");
- }
- break;
- case SIGUSR1:
- CMM_STORE_SHARED(recv_child_signal, 1);
- break;
- default:
- break;
- }
-}
-
-/*
- * Setup signal handler for :
- * SIGINT, SIGTERM, SIGPIPE
- */
-static int set_signal_handler(void)
-{
- int ret = 0;
- struct sigaction sa;
- sigset_t sigset;
-
- if ((ret = sigemptyset(&sigset)) < 0) {
- PERROR("sigemptyset");
- return ret;
- }
-
- sa.sa_mask = sigset;
- sa.sa_flags = 0;
-
- sa.sa_handler = sighandler;
- if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- sa.sa_handler = SIG_IGN;
- if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT");
-
- return ret;
-}
-
-void lttng_relay_notify_ready(void)
-{
- /* Notify the parent of the fork() process that we are ready. */
- if (opt_daemon || opt_background) {
- if (uatomic_sub_return(<tng_relay_ready, 1) == 0) {
- kill(child_ppid, SIGUSR1);
- }
- }
-}
-
-/*
- * Init thread quit pipe.
- *
- * Return -1 on error or 0 if all pipes are created.
- */
-static int init_thread_quit_pipe(void)
-{
- int ret;
-
- ret = utils_create_pipe_cloexec(thread_quit_pipe);
-
- return ret;
-}
-
-/*
- * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set.
- */
-static int create_thread_poll_set(struct lttng_poll_event *events, int size)
-{
- int ret;
-
- if (events == NULL || size == 0) {
- ret = -1;
- goto error;
- }
-
- ret = lttng_poll_create(events, size, LTTNG_CLOEXEC);
- if (ret < 0) {
- goto error;
- }
-
- /* Add quit pipe */
- ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR);
- if (ret < 0) {
- goto error;
- }
-
- return 0;
-
-error:
- return ret;
-}
-
-/*
- * Check if the thread quit pipe was triggered.
- *
- * Return 1 if it was triggered else 0;
- */
-static int check_thread_quit_pipe(int fd, uint32_t events)
-{
- if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) {
- return 1;
- }
-
- return 0;
-}
-
-/*
- * Create and init socket from uri.
- */
-static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri)
-{
- int ret;
- struct lttcomm_sock *sock = NULL;
-
- sock = lttcomm_alloc_sock_from_uri(uri);
- if (sock == NULL) {
- ERR("Allocating socket");
- goto error;
- }
-
- ret = lttcomm_create_sock(sock);
- if (ret < 0) {
- goto error;
- }
- DBG("Listening on sock %d", sock->fd);
-
- ret = sock->ops->bind(sock);
- if (ret < 0) {
- PERROR("Failed to bind socket");
- goto error;
- }
-
- ret = sock->ops->listen(sock, -1);
- if (ret < 0) {
- goto error;
-
- }
-
- return sock;
-
-error:
- if (sock) {
- lttcomm_destroy_sock(sock);
- }
- return NULL;
-}
-
-/*
- * This thread manages the listening for new connections on the network
- */
-static void *relay_thread_listener(void *data)
-{
- int i, ret, pollfd, err = -1;
- uint32_t revents, nb_fd;
- struct lttng_poll_event events;
- struct lttcomm_sock *control_sock, *data_sock;
-
- DBG("[thread] Relay listener started");
-
- health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER);
-
- health_code_update();
-
- control_sock = relay_socket_create(control_uri);
- if (!control_sock) {
- goto error_sock_control;
- }
-
- data_sock = relay_socket_create(data_uri);
- if (!data_sock) {
- goto error_sock_relay;
- }
-
- /*
- * Pass 3 as size here for the thread quit pipe, control and
- * data socket.
- */
- ret = create_thread_poll_set(&events, 3);
- if (ret < 0) {
- goto error_create_poll;
- }
-
- /* Add the control socket */
- ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP);
- if (ret < 0) {
- goto error_poll_add;
- }
-
- /* Add the data socket */
- ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP);
- if (ret < 0) {
- goto error_poll_add;
- }
-
- lttng_relay_notify_ready();
-
- if (testpoint(relayd_thread_listener)) {
- goto error_testpoint;
- }
-
- while (1) {
- health_code_update();
-
- DBG("Listener accepting connections");
-
-restart:
- health_poll_entry();
- ret = lttng_poll_wait(&events, -1);
- health_poll_exit();
- if (ret < 0) {
- /*
- * Restart interrupted system call.
- */
- if (errno == EINTR) {
- goto restart;
- }
- goto error;
- }
-
- nb_fd = ret;
-
- DBG("Relay new connection received");
- for (i = 0; i < nb_fd; i++) {
- health_code_update();
-
- /* Fetch once the poll data */
- revents = LTTNG_POLL_GETEV(&events, i);
- pollfd = LTTNG_POLL_GETFD(&events, i);
-
- if (!revents) {
- /*
- * No activity for this FD (poll
- * implementation).
- */
- continue;
- }
-
- /* Thread quit pipe has been closed. Killing thread. */
- ret = check_thread_quit_pipe(pollfd, revents);
- if (ret) {
- err = 0;
- goto exit;
- }
-
- if (revents & LPOLLIN) {
- /*
- * A new connection is requested, therefore a
- * sessiond/consumerd connection is allocated in
- * this thread, enqueued to a global queue and
- * dequeued (and freed) in the worker thread.
- */
- int val = 1;
- struct relay_connection *new_conn;
- struct lttcomm_sock *newsock;
- enum connection_type type;
-
- if (pollfd == data_sock->fd) {
- type = RELAY_DATA;
- newsock = data_sock->ops->accept(data_sock);
- DBG("Relay data connection accepted, socket %d",
- newsock->fd);
- } else {
- assert(pollfd == control_sock->fd);
- type = RELAY_CONTROL;
- newsock = control_sock->ops->accept(control_sock);
- DBG("Relay control connection accepted, socket %d",
- newsock->fd);
- }
- if (!newsock) {
- PERROR("accepting sock");
- goto error;
- }
-
- ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val,
- sizeof(val));
- if (ret < 0) {
- PERROR("setsockopt inet");
- lttcomm_destroy_sock(newsock);
- goto error;
- }
-
- ret = socket_apply_keep_alive_config(newsock->fd);
- if (ret < 0) {
- ERR("Failed to apply TCP keep-alive configuration on socket (%i)",
- newsock->fd);
- lttcomm_destroy_sock(newsock);
- goto error;
- }
-
- new_conn = connection_create(newsock, type);
- if (!new_conn) {
- lttcomm_destroy_sock(newsock);
- goto error;
- }
-
- /* Enqueue request for the dispatcher thread. */
- cds_wfcq_enqueue(&relay_conn_queue.head, &relay_conn_queue.tail,
- &new_conn->qnode);
-
- /*
- * Wake the dispatch queue futex.
- * Implicit memory barrier with the
- * exchange in cds_wfcq_enqueue.
- */
- futex_nto1_wake(&relay_conn_queue.futex);
- } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
- ERR("socket poll error");
- goto error;
- } else {
- ERR("Unexpected poll events %u for sock %d", revents, pollfd);
- goto error;
- }
- }
- }
-
-exit:
-error:
-error_poll_add:
-error_testpoint:
- lttng_poll_clean(&events);
-error_create_poll:
- if (data_sock->fd >= 0) {
- ret = data_sock->ops->close(data_sock);
- if (ret) {
- PERROR("close");
- }
- }
- lttcomm_destroy_sock(data_sock);
-error_sock_relay:
- if (control_sock->fd >= 0) {
- ret = control_sock->ops->close(control_sock);
- if (ret) {
- PERROR("close");
- }
- }
- lttcomm_destroy_sock(control_sock);
-error_sock_control:
- if (err) {
- health_error();
- ERR("Health error occurred in %s", __func__);
- }
- health_unregister(health_relayd);
- DBG("Relay listener thread cleanup complete");
- lttng_relay_stop_threads();
- return NULL;
-}
-
-/*
- * This thread manages the dispatching of the requests to worker threads
- */
-static void *relay_thread_dispatcher(void *data)
-{
- int err = -1;
- ssize_t ret;
- struct cds_wfcq_node *node;
- struct relay_connection *new_conn = NULL;
-
- DBG("[thread] Relay dispatcher started");
-
- health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER);
-
- if (testpoint(relayd_thread_dispatcher)) {
- goto error_testpoint;
- }
-
- health_code_update();
-
- for (;;) {
- health_code_update();
-
- /* Atomically prepare the queue futex */
- futex_nto1_prepare(&relay_conn_queue.futex);
-
- if (CMM_LOAD_SHARED(dispatch_thread_exit)) {
- break;
- }
-
- do {
- health_code_update();
-
- /* Dequeue commands */
- node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head,
- &relay_conn_queue.tail);
- if (node == NULL) {
- DBG("Woken up but nothing in the relay command queue");
- /* Continue thread execution */
- break;
- }
- new_conn = caa_container_of(node, struct relay_connection, qnode);
-
- DBG("Dispatching request waiting on sock %d", new_conn->sock->fd);
-
- /*
- * Inform worker thread of the new request. This
- * call is blocking so we can be assured that
- * the data will be read at some point in time
- * or wait to the end of the world :)
- */
- ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn));
- if (ret < 0) {
- PERROR("write connection pipe");
- connection_put(new_conn);
- goto error;
- }
- } while (node != NULL);
-
- /* Futex wait on queue. Blocking call on futex() */
- health_poll_entry();
- futex_nto1_wait(&relay_conn_queue.futex);
- health_poll_exit();
- }
-
- /* Normal exit, no error */
- err = 0;
-
-error:
-error_testpoint:
- if (err) {
- health_error();
- ERR("Health error occurred in %s", __func__);
- }
- health_unregister(health_relayd);
- DBG("Dispatch thread dying");
- lttng_relay_stop_threads();
- return NULL;
-}
-
-/*
- * Set index data from the control port to a given index object.
- */
-static int set_index_control_data(struct relay_index *index,
- struct lttcomm_relayd_index *data,
- struct relay_connection *conn)
-{
- struct ctf_packet_index index_data;
-
- /*
- * The index on disk is encoded in big endian.
- */
- index_data.packet_size = htobe64(data->packet_size);
- index_data.content_size = htobe64(data->content_size);
- index_data.timestamp_begin = htobe64(data->timestamp_begin);
- index_data.timestamp_end = htobe64(data->timestamp_end);
- index_data.events_discarded = htobe64(data->events_discarded);
- index_data.stream_id = htobe64(data->stream_id);
-
- if (conn->minor >= 8) {
- index->index_data.stream_instance_id = htobe64(data->stream_instance_id);
- index->index_data.packet_seq_num = htobe64(data->packet_seq_num);
- }
-
- return relay_index_set_data(index, &index_data);
-}
-
-static bool session_streams_have_index(const struct relay_session *session)
-{
- return session->minor >= 4 && !session->snapshot;
-}
-
-/*
- * Handle the RELAYD_CREATE_SESSION command.
- *
- * On success, send back the session id or else return a negative value.
- */
-static int relay_create_session(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret = 0;
- ssize_t send_ret;
- struct relay_session *session;
- struct lttcomm_relayd_status_session reply;
- char session_name[LTTNG_NAME_MAX];
- char hostname[LTTNG_HOST_NAME_MAX];
- uint32_t live_timer = 0;
- bool snapshot = false;
-
- memset(session_name, 0, LTTNG_NAME_MAX);
- memset(hostname, 0, LTTNG_HOST_NAME_MAX);
-
- memset(&reply, 0, sizeof(reply));
-
- if (conn->minor < 4) {
- /* From 2.1 to 2.3 */
- ret = 0;
- } else if (conn->minor >= 4 && conn->minor < 11) {
- /* From 2.4 to 2.10 */
- ret = cmd_create_session_2_4(payload, session_name,
- hostname, &live_timer, &snapshot);
- } else {
- /* From 2.11 to ... */
- ret = cmd_create_session_2_11(payload, session_name,
- hostname, &live_timer, &snapshot);
- }
-
- if (ret < 0) {
- goto send_reply;
- }
-
- session = session_create(session_name, hostname, live_timer,
- snapshot, conn->major, conn->minor);
- if (!session) {
- ret = -1;
- goto send_reply;
- }
- assert(!conn->session);
- conn->session = session;
- DBG("Created session %" PRIu64, session->id);
-
- reply.session_id = htobe64(session->id);
-
-send_reply:
- if (ret < 0) {
- reply.ret_code = htobe32(LTTNG_ERR_FATAL);
- } else {
- reply.ret_code = htobe32(LTTNG_OK);
- }
-
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"create session\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- }
-
- return ret;
-}
-
-/*
- * When we have received all the streams and the metadata for a channel,
- * we make them visible to the viewer threads.
- */
-static void publish_connection_local_streams(struct relay_connection *conn)
-{
- struct relay_stream *stream;
- struct relay_session *session = conn->session;
-
- /*
- * We publish all streams belonging to a session atomically wrt
- * session lock.
- */
- pthread_mutex_lock(&session->lock);
- rcu_read_lock();
- cds_list_for_each_entry_rcu(stream, &session->recv_list,
- recv_node) {
- stream_publish(stream);
- }
- rcu_read_unlock();
-
- /*
- * Inform the viewer that there are new streams in the session.
- */
- if (session->viewer_attached) {
- uatomic_set(&session->new_streams, 1);
- }
- pthread_mutex_unlock(&session->lock);
-}
-
-/*
- * relay_add_stream: allocate a new stream for a session
- */
-static int relay_add_stream(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct relay_session *session = conn->session;
- struct relay_stream *stream = NULL;
- struct lttcomm_relayd_status_stream reply;
- struct ctf_trace *trace = NULL;
- uint64_t stream_handle = -1ULL;
- char *path_name = NULL, *channel_name = NULL;
- uint64_t tracefile_size = 0, tracefile_count = 0;
- struct relay_stream_chunk_id stream_chunk_id = { 0 };
-
- if (!session || !conn->version_check_done) {
- ERR("Trying to add a stream before version check");
- ret = -1;
- goto end_no_session;
- }
-
- if (session->minor == 1) {
- /* For 2.1 */
- ret = cmd_recv_stream_2_1(payload, &path_name,
- &channel_name);
- } else if (session->minor > 1 && session->minor < 11) {
- /* From 2.2 to 2.10 */
- ret = cmd_recv_stream_2_2(payload, &path_name,
- &channel_name, &tracefile_size, &tracefile_count);
- } else {
- /* From 2.11 to ... */
- ret = cmd_recv_stream_2_11(payload, &path_name,
- &channel_name, &tracefile_size, &tracefile_count,
- &stream_chunk_id.value);
- stream_chunk_id.is_set = true;
- }
-
- if (ret < 0) {
- goto send_reply;
- }
-
- trace = ctf_trace_get_by_path_or_create(session, path_name);
- if (!trace) {
- goto send_reply;
- }
- /* This stream here has one reference on the trace. */
-
- pthread_mutex_lock(&last_relay_stream_id_lock);
- stream_handle = ++last_relay_stream_id;
- pthread_mutex_unlock(&last_relay_stream_id_lock);
-
- /* We pass ownership of path_name and channel_name. */
- stream = stream_create(trace, stream_handle, path_name,
- channel_name, tracefile_size, tracefile_count,
- &stream_chunk_id);
- path_name = NULL;
- channel_name = NULL;
-
- /*
- * Streams are the owners of their trace. Reference to trace is
- * kept within stream_create().
- */
- ctf_trace_put(trace);
-
-send_reply:
- memset(&reply, 0, sizeof(reply));
- reply.handle = htobe64(stream_handle);
- if (!stream) {
- reply.ret_code = htobe32(LTTNG_ERR_UNK);
- } else {
- reply.ret_code = htobe32(LTTNG_OK);
- }
-
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
- sizeof(struct lttcomm_relayd_status_stream), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"add stream\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- }
-
-end_no_session:
- free(path_name);
- free(channel_name);
- return ret;
-}
-
-/*
- * relay_close_stream: close a specific stream
- */
-static int relay_close_stream(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_close_stream stream_info;
- struct lttcomm_relayd_generic_reply reply;
- struct relay_stream *stream;
-
- DBG("Close stream received");
-
- if (!session || !conn->version_check_done) {
- ERR("Trying to close a stream before version check");
- ret = -1;
- goto end_no_session;
- }
-
- if (payload->size < sizeof(stream_info)) {
- ERR("Unexpected payload size in \"relay_close_stream\": expected >= %zu bytes, got %zu bytes",
- sizeof(stream_info), payload->size);
- ret = -1;
- goto end_no_session;
- }
- memcpy(&stream_info, payload->data, sizeof(stream_info));
- stream_info.stream_id = be64toh(stream_info.stream_id);
- stream_info.last_net_seq_num = be64toh(stream_info.last_net_seq_num);
-
- stream = stream_get_by_id(stream_info.stream_id);
- if (!stream) {
- ret = -1;
- goto end;
- }
-
- /*
- * Set last_net_seq_num before the close flag. Required by data
- * pending check.
- */
- pthread_mutex_lock(&stream->lock);
- stream->last_net_seq_num = stream_info.last_net_seq_num;
- pthread_mutex_unlock(&stream->lock);
-
- /*
- * This is one of the conditions which may trigger a stream close
- * with the others being:
- * 1) A close command is received for a stream
- * 2) The control connection owning the stream is closed
- * 3) We have received all of the stream's data _after_ a close
- * request.
- */
- try_stream_close(stream);
- if (stream->is_metadata) {
- struct relay_viewer_stream *vstream;
-
- vstream = viewer_stream_get_by_id(stream->stream_handle);
- if (vstream) {
- if (vstream->metadata_sent == stream->metadata_received) {
- /*
- * Since all the metadata has been sent to the
- * viewer and that we have a request to close
- * its stream, we can safely teardown the
- * corresponding metadata viewer stream.
- */
- viewer_stream_put(vstream);
- }
- /* Put local reference. */
- viewer_stream_put(vstream);
- }
- }
- stream_put(stream);
- ret = 0;
-
-end:
- memset(&reply, 0, sizeof(reply));
- if (ret < 0) {
- reply.ret_code = htobe32(LTTNG_ERR_UNK);
- } else {
- reply.ret_code = htobe32(LTTNG_OK);
- }
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
- sizeof(struct lttcomm_relayd_generic_reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"close stream\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- }
-
-end_no_session:
- return ret;
-}
-
-/*
- * relay_reset_metadata: reset a metadata stream
- */
-static
-int relay_reset_metadata(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_reset_metadata stream_info;
- struct lttcomm_relayd_generic_reply reply;
- struct relay_stream *stream;
-
- DBG("Reset metadata received");
-
- if (!session || !conn->version_check_done) {
- ERR("Trying to reset a metadata stream before version check");
- ret = -1;
- goto end_no_session;
- }
-
- if (payload->size < sizeof(stream_info)) {
- ERR("Unexpected payload size in \"relay_reset_metadata\": expected >= %zu bytes, got %zu bytes",
- sizeof(stream_info), payload->size);
- ret = -1;
- goto end_no_session;
- }
- memcpy(&stream_info, payload->data, sizeof(stream_info));
- stream_info.stream_id = be64toh(stream_info.stream_id);
- stream_info.version = be64toh(stream_info.version);
-
- DBG("Update metadata to version %" PRIu64, stream_info.version);
-
- /* Unsupported for live sessions for now. */
- if (session->live_timer != 0) {
- ret = -1;
- goto end;
- }
-
- stream = stream_get_by_id(stream_info.stream_id);
- if (!stream) {
- ret = -1;
- goto end;
- }
- pthread_mutex_lock(&stream->lock);
- if (!stream->is_metadata) {
- ret = -1;
- goto end_unlock;
- }
-
- ret = utils_rotate_stream_file(stream->path_name, stream->channel_name,
- 0, 0, -1, -1, stream->stream_fd->fd, NULL,
- &stream->stream_fd->fd);
- if (ret < 0) {
- ERR("Failed to rotate metadata file %s of channel %s",
- stream->path_name, stream->channel_name);
- goto end_unlock;
- }
-
-end_unlock:
- pthread_mutex_unlock(&stream->lock);
- stream_put(stream);
-
-end:
- memset(&reply, 0, sizeof(reply));
- if (ret < 0) {
- reply.ret_code = htobe32(LTTNG_ERR_UNK);
- } else {
- reply.ret_code = htobe32(LTTNG_OK);
- }
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
- sizeof(struct lttcomm_relayd_generic_reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"reset metadata\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- }
-
-end_no_session:
- return ret;
-}
-
-/*
- * relay_unknown_command: send -1 if received unknown command
- */
-static void relay_unknown_command(struct relay_connection *conn)
-{
- struct lttcomm_relayd_generic_reply reply;
- ssize_t send_ret;
-
- memset(&reply, 0, sizeof(reply));
- reply.ret_code = htobe32(LTTNG_ERR_UNK);
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < sizeof(reply)) {
- ERR("Failed to send \"unknown command\" command reply (ret = %zd)", send_ret);
- }
-}
-
-/*
- * relay_start: send an acknowledgment to the client to tell if we are
- * ready to receive data. We are ready if a session is established.
- */
-static int relay_start(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret = 0;
- ssize_t send_ret;
- struct lttcomm_relayd_generic_reply reply;
- struct relay_session *session = conn->session;
-
- if (!session) {
- DBG("Trying to start the streaming without a session established");
- ret = htobe32(LTTNG_ERR_UNK);
- }
-
- memset(&reply, 0, sizeof(reply));
- reply.ret_code = htobe32(LTTNG_OK);
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
- sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"relay_start\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- }
-
- return ret;
-}
-
-/*
- * Append padding to the file pointed by the file descriptor fd.
- */
-static int write_padding_to_file(int fd, uint32_t size)
-{
- ssize_t ret = 0;
- char *zeros;
-
- if (size == 0) {
- goto end;
- }
-
- zeros = zmalloc(size);
- if (zeros == NULL) {
- PERROR("zmalloc zeros for padding");
- ret = -1;
- goto end;
- }
-
- ret = lttng_write(fd, zeros, size);
- if (ret < size) {
- PERROR("write padding to file");
- }
-
- free(zeros);
-
-end:
- return ret;
-}
-
-/*
- * Close the current index file if it is open, and create a new one.
- *
- * Return 0 on success, -1 on error.
- */
-static
-int create_rotate_index_file(struct relay_stream *stream,
- const char *stream_path)
-{
- int ret;
- uint32_t major, minor;
-
- /* Put ref on previous index_file. */
- if (stream->index_file) {
- lttng_index_file_put(stream->index_file);
- stream->index_file = NULL;
- }
- major = stream->trace->session->major;
- minor = stream->trace->session->minor;
- stream->index_file = lttng_index_file_create(stream_path,
- stream->channel_name,
- -1, -1, stream->tracefile_size,
- tracefile_array_get_file_index_head(stream->tfa),
- lttng_to_index_major(major, minor),
- lttng_to_index_minor(major, minor));
- if (!stream->index_file) {
- ret = -1;
- goto end;
- }
-
- ret = 0;
-
-end:
- return ret;
-}
-
-static
-int do_rotate_stream(struct relay_stream *stream)
-{
- int ret;
-
- /* Perform the stream rotation. */
- ret = utils_rotate_stream_file(stream->path_name,
- stream->channel_name, stream->tracefile_size,
- stream->tracefile_count, -1,
- -1, stream->stream_fd->fd,
- NULL, &stream->stream_fd->fd);
- if (ret < 0) {
- ERR("Rotating stream output file");
- goto end;
- }
- stream->tracefile_size_current = 0;
-
- /* Rotate also the index if the stream is not a metadata stream. */
- if (!stream->is_metadata) {
- ret = create_rotate_index_file(stream, stream->path_name);
- if (ret < 0) {
- ERR("Failed to rotate index file");
- goto end;
- }
- }
-
- stream->rotate_at_seq_num = -1ULL;
- stream->pos_after_last_complete_data_index = 0;
-
-end:
- return ret;
-}
-
-/*
- * If too much data has been written in a tracefile before we received the
- * rotation command, we have to move the excess data to the new tracefile and
- * perform the rotation. This can happen because the control and data
- * connections are separate, the indexes as well as the commands arrive from
- * the control connection and we have no control over the order so we could be
- * in a situation where too much data has been received on the data connection
- * before the rotation command on the control connection arrives. We don't need
- * to update the index because its order is guaranteed with the rotation
- * command message.
- */
-static
-int rotate_truncate_stream(struct relay_stream *stream)
-{
- int ret, new_fd;
- off_t lseek_ret;
- uint64_t diff, pos = 0;
- char buf[FILE_COPY_BUFFER_SIZE];
-
- assert(!stream->is_metadata);
-
- assert(stream->tracefile_size_current >
- stream->pos_after_last_complete_data_index);
- diff = stream->tracefile_size_current -
- stream->pos_after_last_complete_data_index;
-
- /* Create the new tracefile. */
- new_fd = utils_create_stream_file(stream->path_name,
- stream->channel_name,
- stream->tracefile_size, stream->tracefile_count,
- /* uid */ -1, /* gid */ -1, /* suffix */ NULL);
- if (new_fd < 0) {
- ERR("Failed to create new stream file at path %s for channel %s",
- stream->path_name, stream->channel_name);
- ret = -1;
- goto end;
- }
-
- /*
- * Rewind the current tracefile to the position at which the rotation
- * should have occured.
- */
- lseek_ret = lseek(stream->stream_fd->fd,
- stream->pos_after_last_complete_data_index, SEEK_SET);
- if (lseek_ret < 0) {
- PERROR("seek truncate stream");
- ret = -1;
- goto end;
- }
-
- /* Move data from the old file to the new file. */
- while (pos < diff) {
- uint64_t count, bytes_left;
- ssize_t io_ret;
-
- bytes_left = diff - pos;
- count = bytes_left > sizeof(buf) ? sizeof(buf) : bytes_left;
- assert(count <= SIZE_MAX);
-
- io_ret = lttng_read(stream->stream_fd->fd, buf, count);
- if (io_ret < (ssize_t) count) {
- char error_string[256];
-
- snprintf(error_string, sizeof(error_string),
- "Failed to read %" PRIu64 " bytes from fd %i in rotate_truncate_stream(), returned %zi",
- count, stream->stream_fd->fd, io_ret);
- if (io_ret == -1) {
- PERROR("%s", error_string);
- } else {
- ERR("%s", error_string);
- }
- ret = -1;
- goto end;
- }
-
- io_ret = lttng_write(new_fd, buf, count);
- if (io_ret < (ssize_t) count) {
- char error_string[256];
-
- snprintf(error_string, sizeof(error_string),
- "Failed to write %" PRIu64 " bytes from fd %i in rotate_truncate_stream(), returned %zi",
- count, new_fd, io_ret);
- if (io_ret == -1) {
- PERROR("%s", error_string);
- } else {
- ERR("%s", error_string);
- }
- ret = -1;
- goto end;
- }
-
- pos += count;
- }
-
- /* Truncate the file to get rid of the excess data. */
- ret = ftruncate(stream->stream_fd->fd,
- stream->pos_after_last_complete_data_index);
- if (ret) {
- PERROR("ftruncate");
- goto end;
- }
-
- ret = close(stream->stream_fd->fd);
- if (ret < 0) {
- PERROR("Closing tracefile");
- goto end;
- }
-
- ret = create_rotate_index_file(stream, stream->path_name);
- if (ret < 0) {
- ERR("Rotate stream index file");
- goto end;
- }
-
- /*
- * Update the offset and FD of all the eventual indexes created by the
- * data connection before the rotation command arrived.
- */
- ret = relay_index_switch_all_files(stream);
- if (ret < 0) {
- ERR("Failed to rotate index file");
- goto end;
- }
-
- stream->stream_fd->fd = new_fd;
- stream->tracefile_size_current = diff;
- stream->pos_after_last_complete_data_index = 0;
- stream->rotate_at_seq_num = -1ULL;
-
- ret = 0;
-
-end:
- return ret;
-}
-
-/*
- * Check if a stream should perform a rotation (for session rotation).
- * Must be called with the stream lock held.
- *
- * Return 0 on success, a negative value on error.
- */
-static
-int try_rotate_stream(struct relay_stream *stream)
-{
- int ret = 0;
- uint64_t trace_seq;
-
- /* No rotation expected. */
- if (stream->rotate_at_seq_num == -1ULL) {
- goto end;
- }
-
- trace_seq = min(stream->prev_data_seq, stream->prev_index_seq);
- if (stream->prev_data_seq == -1ULL || stream->prev_index_seq == -1ULL ||
- trace_seq < stream->rotate_at_seq_num) {
- DBG("Stream %" PRIu64 " not yet ready for rotation (rotate_at_seq_num = %" PRIu64 ", prev_data_seq = %" PRIu64 ", prev_index_seq = %" PRIu64 ")",
- stream->stream_handle,
- stream->rotate_at_seq_num,
- stream->prev_data_seq,
- stream->prev_index_seq);
- goto end;
- } else if (stream->prev_data_seq > stream->rotate_at_seq_num) {
- /*
- * prev_data_seq is checked here since indexes and rotation
- * commands are serialized with respect to each other.
- */
- DBG("Rotation after too much data has been written in tracefile "
- "for stream %" PRIu64 ", need to truncate before "
- "rotating", stream->stream_handle);
- ret = rotate_truncate_stream(stream);
- if (ret) {
- ERR("Failed to truncate stream");
- goto end;
- }
- } else {
- if (trace_seq != stream->rotate_at_seq_num) {
- /*
- * Unexpected, protocol error/bug.
- * It could mean that we received a rotation position
- * that is in the past.
- */
- ERR("Stream %" PRIu64 " is in an inconsistent state (rotate_at_seq_num = %" PRIu64 ", prev_data_seq = %" PRIu64 ", prev_index_seq = %" PRIu64 ")",
- stream->stream_handle,
- stream->rotate_at_seq_num,
- stream->prev_data_seq,
- stream->prev_index_seq);
- ret = -1;
- goto end;
- }
- DBG("Stream %" PRIu64 " ready for rotation",
- stream->stream_handle);
- ret = do_rotate_stream(stream);
- }
-
-end:
- return ret;
-}
-
-/*
- * relay_recv_metadata: receive the metadata for the session.
- */
-static int relay_recv_metadata(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret = 0;
- ssize_t size_ret;
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_metadata_payload metadata_payload_header;
- struct relay_stream *metadata_stream;
- uint64_t metadata_payload_size;
-
- if (!session) {
- ERR("Metadata sent before version check");
- ret = -1;
- goto end;
- }
-
- if (recv_hdr->data_size < sizeof(struct lttcomm_relayd_metadata_payload)) {
- ERR("Incorrect data size");
- ret = -1;
- goto end;
- }
- metadata_payload_size = recv_hdr->data_size -
- sizeof(struct lttcomm_relayd_metadata_payload);
-
- memcpy(&metadata_payload_header, payload->data,
- sizeof(metadata_payload_header));
- metadata_payload_header.stream_id = be64toh(
- metadata_payload_header.stream_id);
- metadata_payload_header.padding_size = be32toh(
- metadata_payload_header.padding_size);
-
- metadata_stream = stream_get_by_id(metadata_payload_header.stream_id);
- if (!metadata_stream) {
- ret = -1;
- goto end;
- }
-
- pthread_mutex_lock(&metadata_stream->lock);
-
- size_ret = lttng_write(metadata_stream->stream_fd->fd,
- payload->data + sizeof(metadata_payload_header),
- metadata_payload_size);
- if (size_ret < metadata_payload_size) {
- ERR("Relay error writing metadata on file");
- ret = -1;
- goto end_put;
- }
-
- size_ret = write_padding_to_file(metadata_stream->stream_fd->fd,
- metadata_payload_header.padding_size);
- if (size_ret < (int64_t) metadata_payload_header.padding_size) {
- ret = -1;
- goto end_put;
- }
-
- metadata_stream->metadata_received +=
- metadata_payload_size + metadata_payload_header.padding_size;
- DBG2("Relay metadata written. Updated metadata_received %" PRIu64,
- metadata_stream->metadata_received);
-
- ret = try_rotate_stream(metadata_stream);
- if (ret < 0) {
- goto end_put;
- }
-
-end_put:
- pthread_mutex_unlock(&metadata_stream->lock);
- stream_put(metadata_stream);
-end:
- return ret;
-}
-
-/*
- * relay_send_version: send relayd version number
- */
-static int relay_send_version(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct lttcomm_relayd_version reply, msg;
- bool compatible = true;
-
- conn->version_check_done = true;
-
- /* Get version from the other side. */
- if (payload->size < sizeof(msg)) {
- ERR("Unexpected payload size in \"relay_send_version\": expected >= %zu bytes, got %zu bytes",
- sizeof(msg), payload->size);
- ret = -1;
- goto end;
- }
-
- memcpy(&msg, payload->data, sizeof(msg));
- msg.major = be32toh(msg.major);
- msg.minor = be32toh(msg.minor);
-
- memset(&reply, 0, sizeof(reply));
- reply.major = RELAYD_VERSION_COMM_MAJOR;
- reply.minor = RELAYD_VERSION_COMM_MINOR;
-
- /* Major versions must be the same */
- if (reply.major != msg.major) {
- DBG("Incompatible major versions (%u vs %u), deleting session",
- reply.major, msg.major);
- compatible = false;
- }
-
- conn->major = reply.major;
- /* We adapt to the lowest compatible version */
- if (reply.minor <= msg.minor) {
- conn->minor = reply.minor;
- } else {
- conn->minor = msg.minor;
- }
-
- reply.major = htobe32(reply.major);
- reply.minor = htobe32(reply.minor);
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
- sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"send version\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- goto end;
- } else {
- ret = 0;
- }
-
- if (!compatible) {
- ret = -1;
- goto end;
- }
-
- DBG("Version check done using protocol %u.%u", conn->major,
- conn->minor);
-
-end:
- return ret;
-}
-
-/*
- * Check for data pending for a given stream id from the session daemon.
- */
-static int relay_data_pending(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_data_pending msg;
- struct lttcomm_relayd_generic_reply reply;
- struct relay_stream *stream;
- ssize_t send_ret;
- int ret;
- uint64_t stream_seq;
-
- DBG("Data pending command received");
-
- if (!session || !conn->version_check_done) {
- ERR("Trying to check for data before version check");
- ret = -1;
- goto end_no_session;
- }
-
- if (payload->size < sizeof(msg)) {
- ERR("Unexpected payload size in \"relay_data_pending\": expected >= %zu bytes, got %zu bytes",
- sizeof(msg), payload->size);
- ret = -1;
- goto end_no_session;
- }
- memcpy(&msg, payload->data, sizeof(msg));
- msg.stream_id = be64toh(msg.stream_id);
- msg.last_net_seq_num = be64toh(msg.last_net_seq_num);
-
- stream = stream_get_by_id(msg.stream_id);
- if (stream == NULL) {
- ret = -1;
- goto end;
- }
-
- pthread_mutex_lock(&stream->lock);
-
- if (session_streams_have_index(session)) {
- /*
- * Ensure that both the index and stream data have been
- * flushed up to the requested point.
- */
- stream_seq = min(stream->prev_data_seq, stream->prev_index_seq);
- } else {
- stream_seq = stream->prev_data_seq;
- }
- DBG("Data pending for stream id %" PRIu64 ": prev_data_seq %" PRIu64
- ", prev_index_seq %" PRIu64
- ", and last_seq %" PRIu64, msg.stream_id,
- stream->prev_data_seq, stream->prev_index_seq,
- msg.last_net_seq_num);
-
- /* Avoid wrapping issue */
- if (((int64_t) (stream_seq - msg.last_net_seq_num)) >= 0) {
- /* Data has in fact been written and is NOT pending */
- ret = 0;
- } else {
- /* Data still being streamed thus pending */
- ret = 1;
- }
-
- stream->data_pending_check_done = true;
- pthread_mutex_unlock(&stream->lock);
-
- stream_put(stream);
-end:
-
- memset(&reply, 0, sizeof(reply));
- reply.ret_code = htobe32(ret);
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"data pending\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- }
-
-end_no_session:
- return ret;
-}
-
-/*
- * Wait for the control socket to reach a quiescent state.
- *
- * Note that for now, when receiving this command from the session
- * daemon, this means that every subsequent commands or data received on
- * the control socket has been handled. So, this is why we simply return
- * OK here.
- */
-static int relay_quiescent_control(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct relay_stream *stream;
- struct lttcomm_relayd_quiescent_control msg;
- struct lttcomm_relayd_generic_reply reply;
-
- DBG("Checking quiescent state on control socket");
-
- if (!conn->session || !conn->version_check_done) {
- ERR("Trying to check for data before version check");
- ret = -1;
- goto end_no_session;
- }
-
- if (payload->size < sizeof(msg)) {
- ERR("Unexpected payload size in \"relay_quiescent_control\": expected >= %zu bytes, got %zu bytes",
- sizeof(msg), payload->size);
- ret = -1;
- goto end_no_session;
- }
- memcpy(&msg, payload->data, sizeof(msg));
- msg.stream_id = be64toh(msg.stream_id);
-
- stream = stream_get_by_id(msg.stream_id);
- if (!stream) {
- goto reply;
- }
- pthread_mutex_lock(&stream->lock);
- stream->data_pending_check_done = true;
- pthread_mutex_unlock(&stream->lock);
-
- DBG("Relay quiescent control pending flag set to %" PRIu64, msg.stream_id);
- stream_put(stream);
-reply:
- memset(&reply, 0, sizeof(reply));
- reply.ret_code = htobe32(LTTNG_OK);
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"quiescent control\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- } else {
- ret = 0;
- }
-
-end_no_session:
- return ret;
-}
-
-/*
- * Initialize a data pending command. This means that a consumer is about
- * to ask for data pending for each stream it holds. Simply iterate over
- * all streams of a session and set the data_pending_check_done flag.
- *
- * This command returns to the client a LTTNG_OK code.
- */
-static int relay_begin_data_pending(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct lttng_ht_iter iter;
- struct lttcomm_relayd_begin_data_pending msg;
- struct lttcomm_relayd_generic_reply reply;
- struct relay_stream *stream;
-
- assert(recv_hdr);
- assert(conn);
-
- DBG("Init streams for data pending");
-
- if (!conn->session || !conn->version_check_done) {
- ERR("Trying to check for data before version check");
- ret = -1;
- goto end_no_session;
- }
-
- if (payload->size < sizeof(msg)) {
- ERR("Unexpected payload size in \"relay_begin_data_pending\": expected >= %zu bytes, got %zu bytes",
- sizeof(msg), payload->size);
- ret = -1;
- goto end_no_session;
- }
- memcpy(&msg, payload->data, sizeof(msg));
- msg.session_id = be64toh(msg.session_id);
-
- /*
- * Iterate over all streams to set the begin data pending flag.
- * For now, the streams are indexed by stream handle so we have
- * to iterate over all streams to find the one associated with
- * the right session_id.
- */
- rcu_read_lock();
- cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream,
- node.node) {
- if (!stream_get(stream)) {
- continue;
- }
- if (stream->trace->session->id == msg.session_id) {
- pthread_mutex_lock(&stream->lock);
- stream->data_pending_check_done = false;
- pthread_mutex_unlock(&stream->lock);
- DBG("Set begin data pending flag to stream %" PRIu64,
- stream->stream_handle);
- }
- stream_put(stream);
- }
- rcu_read_unlock();
-
- memset(&reply, 0, sizeof(reply));
- /* All good, send back reply. */
- reply.ret_code = htobe32(LTTNG_OK);
-
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"begin data pending\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- } else {
- ret = 0;
- }
-
-end_no_session:
- return ret;
-}
-
-/*
- * End data pending command. This will check, for a given session id, if
- * each stream associated with it has its data_pending_check_done flag
- * set. If not, this means that the client lost track of the stream but
- * the data is still being streamed on our side. In this case, we inform
- * the client that data is in flight.
- *
- * Return to the client if there is data in flight or not with a ret_code.
- */
-static int relay_end_data_pending(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct lttng_ht_iter iter;
- struct lttcomm_relayd_end_data_pending msg;
- struct lttcomm_relayd_generic_reply reply;
- struct relay_stream *stream;
- uint32_t is_data_inflight = 0;
-
- DBG("End data pending command");
-
- if (!conn->session || !conn->version_check_done) {
- ERR("Trying to check for data before version check");
- ret = -1;
- goto end_no_session;
- }
-
- if (payload->size < sizeof(msg)) {
- ERR("Unexpected payload size in \"relay_end_data_pending\": expected >= %zu bytes, got %zu bytes",
- sizeof(msg), payload->size);
- ret = -1;
- goto end_no_session;
- }
- memcpy(&msg, payload->data, sizeof(msg));
- msg.session_id = be64toh(msg.session_id);
-
- /*
- * Iterate over all streams to see if the begin data pending
- * flag is set.
- */
- rcu_read_lock();
- cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream,
- node.node) {
- if (!stream_get(stream)) {
- continue;
- }
- if (stream->trace->session->id != msg.session_id) {
- stream_put(stream);
- continue;
- }
- pthread_mutex_lock(&stream->lock);
- if (!stream->data_pending_check_done) {
- uint64_t stream_seq;
-
- if (session_streams_have_index(conn->session)) {
- /*
- * Ensure that both the index and stream data have been
- * flushed up to the requested point.
- */
- stream_seq = min(stream->prev_data_seq, stream->prev_index_seq);
- } else {
- stream_seq = stream->prev_data_seq;
- }
- if (!stream->closed || !(((int64_t) (stream_seq - stream->last_net_seq_num)) >= 0)) {
- is_data_inflight = 1;
- DBG("Data is still in flight for stream %" PRIu64,
- stream->stream_handle);
- pthread_mutex_unlock(&stream->lock);
- stream_put(stream);
- break;
- }
- }
- pthread_mutex_unlock(&stream->lock);
- stream_put(stream);
- }
- rcu_read_unlock();
-
- memset(&reply, 0, sizeof(reply));
- /* All good, send back reply. */
- reply.ret_code = htobe32(is_data_inflight);
-
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"end data pending\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- } else {
- ret = 0;
- }
-
-end_no_session:
- return ret;
-}
-
-/*
- * Receive an index for a specific stream.
- *
- * Return 0 on success else a negative value.
- */
-static int relay_recv_index(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_index index_info;
- struct relay_index *index;
- struct lttcomm_relayd_generic_reply reply;
- struct relay_stream *stream;
- size_t msg_len;
-
- assert(conn);
-
- DBG("Relay receiving index");
-
- if (!session || !conn->version_check_done) {
- ERR("Trying to close a stream before version check");
- ret = -1;
- goto end_no_session;
- }
-
- msg_len = lttcomm_relayd_index_len(
- lttng_to_index_major(conn->major, conn->minor),
- lttng_to_index_minor(conn->major, conn->minor));
- if (payload->size < msg_len) {
- ERR("Unexpected payload size in \"relay_recv_index\": expected >= %zu bytes, got %zu bytes",
- msg_len, payload->size);
- ret = -1;
- goto end_no_session;
- }
- memcpy(&index_info, payload->data, msg_len);
- index_info.relay_stream_id = be64toh(index_info.relay_stream_id);
- index_info.net_seq_num = be64toh(index_info.net_seq_num);
- index_info.packet_size = be64toh(index_info.packet_size);
- index_info.content_size = be64toh(index_info.content_size);
- index_info.timestamp_begin = be64toh(index_info.timestamp_begin);
- index_info.timestamp_end = be64toh(index_info.timestamp_end);
- index_info.events_discarded = be64toh(index_info.events_discarded);
- index_info.stream_id = be64toh(index_info.stream_id);
-
- if (conn->minor >= 8) {
- index_info.stream_instance_id =
- be64toh(index_info.stream_instance_id);
- index_info.packet_seq_num = be64toh(index_info.packet_seq_num);
- }
-
- stream = stream_get_by_id(index_info.relay_stream_id);
- if (!stream) {
- ERR("stream_get_by_id not found");
- ret = -1;
- goto end;
- }
- pthread_mutex_lock(&stream->lock);
-
- /* Live beacon handling */
- if (index_info.packet_size == 0) {
- DBG("Received live beacon for stream %" PRIu64,
- stream->stream_handle);
-
- /*
- * Only flag a stream inactive when it has already
- * received data and no indexes are in flight.
- */
- if (stream->index_received_seqcount > 0
- && stream->indexes_in_flight == 0) {
- stream->beacon_ts_end = index_info.timestamp_end;
- }
- ret = 0;
- goto end_stream_put;
- } else {
- stream->beacon_ts_end = -1ULL;
- }
-
- if (stream->ctf_stream_id == -1ULL) {
- stream->ctf_stream_id = index_info.stream_id;
- }
- index = relay_index_get_by_id_or_create(stream, index_info.net_seq_num);
- if (!index) {
- ret = -1;
- ERR("relay_index_get_by_id_or_create index NULL");
- goto end_stream_put;
- }
- if (set_index_control_data(index, &index_info, conn)) {
- ERR("set_index_control_data error");
- relay_index_put(index);
- ret = -1;
- goto end_stream_put;
- }
- ret = relay_index_try_flush(index);
- if (ret == 0) {
- tracefile_array_commit_seq(stream->tfa);
- stream->index_received_seqcount++;
- stream->pos_after_last_complete_data_index += index->total_size;
- stream->prev_index_seq = index_info.net_seq_num;
- } else if (ret > 0) {
- /* no flush. */
- ret = 0;
- } else {
- /*
- * ret < 0
- *
- * relay_index_try_flush is responsible for the self-reference
- * put of the index object on error.
- */
- ERR("relay_index_try_flush error %d", ret);
- ret = -1;
- }
-
-end_stream_put:
- pthread_mutex_unlock(&stream->lock);
- stream_put(stream);
-
-end:
-
- memset(&reply, 0, sizeof(reply));
- if (ret < 0) {
- reply.ret_code = htobe32(LTTNG_ERR_UNK);
- } else {
- reply.ret_code = htobe32(LTTNG_OK);
- }
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"recv index\" command reply (ret = %zd)", send_ret);
- ret = -1;
- }
-
-end_no_session:
- return ret;
-}
-
-/*
- * Receive the streams_sent message.
- *
- * Return 0 on success else a negative value.
- */
-static int relay_streams_sent(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct lttcomm_relayd_generic_reply reply;
-
- assert(conn);
-
- DBG("Relay receiving streams_sent");
-
- if (!conn->session || !conn->version_check_done) {
- ERR("Trying to close a stream before version check");
- ret = -1;
- goto end_no_session;
- }
-
- /*
- * Publish every pending stream in the connection recv list which are
- * now ready to be used by the viewer.
- */
- publish_connection_local_streams(conn);
-
- memset(&reply, 0, sizeof(reply));
- reply.ret_code = htobe32(LTTNG_OK);
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"streams sent\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- } else {
- /* Success. */
- ret = 0;
- }
-
-end_no_session:
- return ret;
-}
-
-/*
- * relay_rotate_session_stream: rotate a stream to a new tracefile for the session
- * rotation feature (not the tracefile rotation feature).
- */
-static int relay_rotate_session_stream(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_rotate_stream stream_info;
- struct lttcomm_relayd_generic_reply reply;
- struct relay_stream *stream;
- size_t header_len;
- size_t path_len;
- struct lttng_buffer_view new_path_view;
-
- DBG("Rotate stream received");
-
- if (!session || !conn->version_check_done) {
- ERR("Trying to rotate a stream before version check");
- ret = -1;
- goto end_no_reply;
- }
-
- if (session->major == 2 && session->minor < 11) {
- ERR("Unsupported feature before 2.11");
- ret = -1;
- goto end_no_reply;
- }
-
- header_len = sizeof(struct lttcomm_relayd_rotate_stream);
-
- if (payload->size < header_len) {
- ERR("Unexpected payload size in \"relay_rotate_session_stream\": expected >= %zu bytes, got %zu bytes",
- header_len, payload->size);
- ret = -1;
- goto end_no_reply;
- }
-
- memcpy(&stream_info, payload->data, header_len);
-
- /* Convert to host */
- stream_info.pathname_length = be32toh(stream_info.pathname_length);
- stream_info.stream_id = be64toh(stream_info.stream_id);
- stream_info.new_chunk_id = be64toh(stream_info.new_chunk_id);
- stream_info.rotate_at_seq_num = be64toh(stream_info.rotate_at_seq_num);
-
- path_len = stream_info.pathname_length;
- if (payload->size < header_len + path_len) {
- ERR("Unexpected payload size in \"relay_rotate_session_stream\" including path: expected >= %zu bytes, got %zu bytes",
- header_len + path_len, payload->size);
- ret = -1;
- goto end_no_reply;
- }
-
- /* Ensure it fits in local filename length. */
- if (path_len >= LTTNG_PATH_MAX) {
- ret = -ENAMETOOLONG;
- ERR("Length of relay_rotate_session_stream command's path name (%zu bytes) exceeds the maximal allowed length of %i bytes",
- path_len, LTTNG_PATH_MAX);
- goto end;
- }
-
- new_path_view = lttng_buffer_view_from_view(payload, header_len,
- stream_info.pathname_length);
-
- stream = stream_get_by_id(stream_info.stream_id);
- if (!stream) {
- ret = -1;
- goto end;
- }
-
- pthread_mutex_lock(&stream->lock);
-
- /*
- * Update the trace path (just the folder, the stream name does not
- * change).
- */
- free(stream->prev_path_name);
- stream->prev_path_name = stream->path_name;
- stream->path_name = create_output_path(new_path_view.data);
- if (!stream->path_name) {
- ERR("Failed to create a new output path");
- ret = -1;
- goto end_stream_unlock;
- }
- ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG,
- -1, -1);
- if (ret < 0) {
- ERR("relay creating output directory");
- ret = -1;
- goto end_stream_unlock;
- }
-
- assert(stream->current_chunk_id.is_set);
- stream->current_chunk_id.value = stream_info.new_chunk_id;
-
- if (stream->is_metadata) {
- /*
- * The metadata stream is sent only over the control connection
- * so we know we have all the data to perform the stream
- * rotation.
- */
- ret = do_rotate_stream(stream);
- } else {
- stream->rotate_at_seq_num = stream_info.rotate_at_seq_num;
- ret = try_rotate_stream(stream);
- }
- if (ret < 0) {
- goto end_stream_unlock;
- }
-
-end_stream_unlock:
- pthread_mutex_unlock(&stream->lock);
- stream_put(stream);
-end:
- memset(&reply, 0, sizeof(reply));
- if (ret < 0) {
- reply.ret_code = htobe32(LTTNG_ERR_UNK);
- } else {
- reply.ret_code = htobe32(LTTNG_OK);
- }
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
- sizeof(struct lttcomm_relayd_generic_reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"rotate session stream\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- }
-
-end_no_reply:
- return ret;
-}
-
-/*
- * relay_mkdir: Create a folder on the disk.
- */
-static int relay_mkdir(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_mkdir path_info_header;
- struct lttcomm_relayd_generic_reply reply;
- char *path = NULL;
- size_t header_len;
- ssize_t send_ret;
- struct lttng_buffer_view path_view;
-
- if (!session || !conn->version_check_done) {
- ERR("Trying to create a directory before version check");
- ret = -1;
- goto end_no_session;
- }
-
- if (session->major == 2 && session->minor < 11) {
- /*
- * This client is not supposed to use this command since
- * it predates its introduction.
- */
- ERR("relay_mkdir command is unsupported before LTTng 2.11");
- ret = -1;
- goto end_no_session;
- }
-
- header_len = sizeof(path_info_header);
- if (payload->size < header_len) {
- ERR("Unexpected payload size in \"relay_mkdir\": expected >= %zu bytes, got %zu bytes",
- header_len, payload->size);
- ret = -1;
- goto end_no_session;
- }
-
- memcpy(&path_info_header, payload->data, header_len);
-
- path_info_header.length = be32toh(path_info_header.length);
-
- if (payload->size < header_len + path_info_header.length) {
- ERR("Unexpected payload size in \"relay_mkdir\" including path: expected >= %zu bytes, got %zu bytes",
- header_len + path_info_header.length, payload->size);
- ret = -1;
- goto end_no_session;
- }
-
- /* Ensure that it fits in local path length. */
- if (path_info_header.length >= LTTNG_PATH_MAX) {
- ret = -ENAMETOOLONG;
- ERR("Path name argument of mkdir command (%" PRIu32 " bytes) exceeds the maximal length allowed (%d bytes)",
- path_info_header.length, LTTNG_PATH_MAX);
- goto end;
- }
-
- path_view = lttng_buffer_view_from_view(payload, header_len,
- path_info_header.length);
-
- path = create_output_path(path_view.data);
- if (!path) {
- ERR("Failed to create output path");
- ret = -1;
- goto end;
- }
-
- DBG("MKDIR command has path \"%s\", changed to \"%s\"", path_view.data, path);
- ret = utils_mkdir_recursive(path, S_IRWXU | S_IRWXG, -1, -1);
- if (ret < 0) {
- ERR("relay creating output directory");
- goto end;
- }
-
- ret = 0;
-
-end:
- memset(&reply, 0, sizeof(reply));
- if (ret < 0) {
- reply.ret_code = htobe32(LTTNG_ERR_UNK);
- } else {
- reply.ret_code = htobe32(LTTNG_OK);
- }
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"mkdir\" command reply (ret = %zd)", send_ret);
- ret = -1;
- }
-
-end_no_session:
- free(path);
- return ret;
-}
-
-static int validate_rotate_rename_path_length(const char *path_type,
- uint32_t path_length)
-{
- int ret = 0;
-
- if (path_length > LTTNG_PATH_MAX) {
- ret = -ENAMETOOLONG;
- ERR("rotate rename \"%s\" path name length (%" PRIu32 " bytes) exceeds the allowed size of %i bytes",
- path_type, path_length, LTTNG_PATH_MAX);
- } else if (path_length == 0) {
- ret = -EINVAL;
- ERR("rotate rename \"%s\" path name has an illegal length of 0", path_type);
- }
- return ret;
-}
-
-/*
- * relay_rotate_rename: rename the trace folder after a rotation is
- * completed. We are not closing any fd here, just moving the folder, so it
- * works even if data is still in-flight.
- */
-static int relay_rotate_rename(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret;
- ssize_t send_ret;
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_generic_reply reply;
- struct lttcomm_relayd_rotate_rename header;
- size_t header_len;
- size_t received_paths_size;
- char *complete_old_path = NULL, *complete_new_path = NULL;
- struct lttng_buffer_view old_path_view;
- struct lttng_buffer_view new_path_view;
-
- if (!session || !conn->version_check_done) {
- ERR("Trying to rename a trace folder before version check");
- ret = -1;
- goto end_no_reply;
- }
-
- if (session->major == 2 && session->minor < 11) {
- ERR("relay_rotate_rename command is unsupported before LTTng 2.11");
- ret = -1;
- goto end_no_reply;
- }
-
- header_len = sizeof(header);
- if (payload->size < header_len) {
- ERR("Unexpected payload size in \"relay_rotate_rename\": expected >= %zu bytes, got %zu bytes",
- header_len, payload->size);
- ret = -1;
- goto end_no_reply;
- }
-
- memcpy(&header, payload->data, header_len);
-
- header.old_path_length = be32toh(header.old_path_length);
- header.new_path_length = be32toh(header.new_path_length);
- received_paths_size = header.old_path_length + header.new_path_length;
-
- if (payload->size < header_len + received_paths_size) {
- ERR("Unexpected payload size in \"relay_rotate_rename\" including paths: expected >= %zu bytes, got %zu bytes",
- header_len, payload->size);
- ret = -1;
- goto end_no_reply;
- }
-
- /* Ensure the paths don't exceed their allowed size. */
- ret = validate_rotate_rename_path_length("old", header.old_path_length);
- if (ret) {
- goto end;
- }
- ret = validate_rotate_rename_path_length("new", header.new_path_length);
- if (ret) {
- goto end;
- }
-
- old_path_view = lttng_buffer_view_from_view(payload, header_len,
- header.old_path_length);
- new_path_view = lttng_buffer_view_from_view(payload,
- header_len + header.old_path_length,
- header.new_path_length);
-
- /* Validate that both paths received are NULL terminated. */
- if (old_path_view.data[old_path_view.size - 1] != '\0') {
- ERR("relay_rotate_rename command's \"old\" path is invalid (not NULL terminated)");
- ret = -1;
- goto end;
- }
- if (new_path_view.data[new_path_view.size - 1] != '\0') {
- ERR("relay_rotate_rename command's \"new\" path is invalid (not NULL terminated)");
- ret = -1;
- goto end;
- }
-
- DBG("ROTATE_RENAME command has argument old path = \"%s\", new_path = \"%s\"",
- old_path_view.data, new_path_view.data);
- complete_old_path = create_output_path(old_path_view.data);
- if (!complete_old_path) {
- ERR("Failed to build old output path in rotate_rename command");
- ret = -1;
- goto end;
- }
-
- complete_new_path = create_output_path(new_path_view.data);
- if (!complete_new_path) {
- ERR("Failed to build new output path in rotate_rename command");
- ret = -1;
- goto end;
- }
- DBG("Expanded ROTATE_RENAME arguments to old path = \"%s\", new_path = \"%s\"",
- complete_old_path, complete_new_path);
-
- ret = utils_mkdir_recursive(complete_new_path, S_IRWXU | S_IRWXG,
- -1, -1);
- if (ret < 0) {
- ERR("Failed to mkdir() rotate_rename's \"new\" output directory at \"%s\"",
- complete_new_path);
- goto end;
- }
-
- /*
- * If a domain has not yet created its channel, the domain-specific
- * folder might not exist, but this is not an error.
- */
- ret = rename(complete_old_path, complete_new_path);
- if (ret < 0 && errno != ENOENT) {
- PERROR("Renaming chunk in rotate_rename command from \"%s\" to \"%s\"",
- complete_old_path, complete_new_path);
- goto end;
- }
- ret = 0;
-
-end:
- memset(&reply, 0, sizeof(reply));
- if (ret < 0) {
- reply.ret_code = htobe32(LTTNG_ERR_UNK);
- } else {
- reply.ret_code = htobe32(LTTNG_OK);
- }
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
- sizeof(reply), 0);
- if (send_ret < sizeof(reply)) {
- ERR("Failed to send \"rotate rename\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- }
-
-end_no_reply:
- free(complete_old_path);
- free(complete_new_path);
- return ret;
-}
-
-/*
- * Check if all the streams in the session have completed the last rotation.
- * The chunk_id value is used to distinguish the cases where a stream was
- * closed on the consumerd before the rotation started but it still active on
- * the relayd, and the case where a stream appeared on the consumerd/relayd
- * after the last rotation started (in that case, it is already writing in the
- * new chunk folder).
- */
-static
-int relay_rotate_pending(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_rotate_pending msg;
- struct lttcomm_relayd_rotate_pending_reply reply;
- struct lttng_ht_iter iter;
- struct relay_stream *stream;
- int ret = 0;
- ssize_t send_ret;
- uint64_t chunk_id;
- bool rotate_pending = false;
-
- DBG("Rotate pending command received");
-
- if (!session || !conn->version_check_done) {
- ERR("Trying to check for data before version check");
- ret = -1;
- goto end_no_reply;
- }
-
- if (session->major == 2 && session->minor < 11) {
- ERR("Unsupported feature before 2.11");
- ret = -1;
- goto end_no_reply;
- }
-
- if (payload->size < sizeof(msg)) {
- ERR("Unexpected payload size in \"relay_rotate_pending\": expected >= %zu bytes, got %zu bytes",
- sizeof(msg), payload->size);
- ret = -1;
- goto end_no_reply;
- }
-
- memcpy(&msg, payload->data, sizeof(msg));
-
- chunk_id = be64toh(msg.chunk_id);
-
- DBG("Evaluating rotate pending for session \"%s\" and chunk id %" PRIu64,
- session->session_name, chunk_id);
-
- /*
- * Iterate over all the streams in the session and check if they are
- * still waiting for data to perform their rotation.
- */
- rcu_read_lock();
- cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream,
- node.node) {
- if (!stream_get(stream)) {
- continue;
- }
- if (stream->trace->session != session) {
- stream_put(stream);
- continue;
- }
- pthread_mutex_lock(&stream->lock);
- if (stream->rotate_at_seq_num != -1ULL) {
- /* We have not yet performed the rotation. */
- rotate_pending = true;
- DBG("Stream %" PRIu64 " is still rotating",
- stream->stream_handle);
- } else if (stream->current_chunk_id.value < chunk_id) {
- /*
- * Stream closed on the consumer but still active on the
- * relay.
- */
- rotate_pending = true;
- DBG("Stream %" PRIu64 " did not exist on the consumer "
- "when the last rotation started, but is"
- "still waiting for data before getting"
- "closed",
- stream->stream_handle);
- }
- pthread_mutex_unlock(&stream->lock);
- stream_put(stream);
- if (rotate_pending) {
- goto send_reply;
- }
- }
-
-send_reply:
- rcu_read_unlock();
- memset(&reply, 0, sizeof(reply));
- reply.generic.ret_code = htobe32((uint32_t) LTTNG_OK);
- reply.is_pending = (uint8_t) !!rotate_pending;
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
- sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"rotate pending\" command reply (ret = %zd)",
- send_ret);
- ret = -1;
- }
-
-end_no_reply:
- return ret;
-}
-
-#define DBG_CMD(cmd_name, conn) \
- DBG3("Processing \"%s\" command for socket %i", cmd_name, conn->sock->fd);
-
-static int relay_process_control_command(struct relay_connection *conn,
- const struct lttcomm_relayd_hdr *header,
- const struct lttng_buffer_view *payload)
-{
- int ret = 0;
-
- switch (header->cmd) {
- case RELAYD_CREATE_SESSION:
- DBG_CMD("RELAYD_CREATE_SESSION", conn);
- ret = relay_create_session(header, conn, payload);
- break;
- case RELAYD_ADD_STREAM:
- DBG_CMD("RELAYD_ADD_STREAM", conn);
- ret = relay_add_stream(header, conn, payload);
- break;
- case RELAYD_START_DATA:
- DBG_CMD("RELAYD_START_DATA", conn);
- ret = relay_start(header, conn, payload);
- break;
- case RELAYD_SEND_METADATA:
- DBG_CMD("RELAYD_SEND_METADATA", conn);
- ret = relay_recv_metadata(header, conn, payload);
- break;
- case RELAYD_VERSION:
- DBG_CMD("RELAYD_VERSION", conn);
- ret = relay_send_version(header, conn, payload);
- break;
- case RELAYD_CLOSE_STREAM:
- DBG_CMD("RELAYD_CLOSE_STREAM", conn);
- ret = relay_close_stream(header, conn, payload);
- break;
- case RELAYD_DATA_PENDING:
- DBG_CMD("RELAYD_DATA_PENDING", conn);
- ret = relay_data_pending(header, conn, payload);
- break;
- case RELAYD_QUIESCENT_CONTROL:
- DBG_CMD("RELAYD_QUIESCENT_CONTROL", conn);
- ret = relay_quiescent_control(header, conn, payload);
- break;
- case RELAYD_BEGIN_DATA_PENDING:
- DBG_CMD("RELAYD_BEGIN_DATA_PENDING", conn);
- ret = relay_begin_data_pending(header, conn, payload);
- break;
- case RELAYD_END_DATA_PENDING:
- DBG_CMD("RELAYD_END_DATA_PENDING", conn);
- ret = relay_end_data_pending(header, conn, payload);
- break;
- case RELAYD_SEND_INDEX:
- DBG_CMD("RELAYD_SEND_INDEX", conn);
- ret = relay_recv_index(header, conn, payload);
- break;
- case RELAYD_STREAMS_SENT:
- DBG_CMD("RELAYD_STREAMS_SENT", conn);
- ret = relay_streams_sent(header, conn, payload);
- break;
- case RELAYD_RESET_METADATA:
- DBG_CMD("RELAYD_RESET_METADATA", conn);
- ret = relay_reset_metadata(header, conn, payload);
- break;
- case RELAYD_ROTATE_STREAM:
- DBG_CMD("RELAYD_ROTATE_STREAM", conn);
- ret = relay_rotate_session_stream(header, conn, payload);
- break;
- case RELAYD_ROTATE_RENAME:
- DBG_CMD("RELAYD_ROTATE_RENAME", conn);
- ret = relay_rotate_rename(header, conn, payload);
- break;
- case RELAYD_ROTATE_PENDING:
- DBG_CMD("RELAYD_ROTATE_PENDING", conn);
- ret = relay_rotate_pending(header, conn, payload);
- break;
- case RELAYD_MKDIR:
- DBG_CMD("RELAYD_MKDIR", conn);
- ret = relay_mkdir(header, conn, payload);
- break;
- case RELAYD_UPDATE_SYNC_INFO:
- default:
- ERR("Received unknown command (%u)", header->cmd);
- relay_unknown_command(conn);
- ret = -1;
- goto end;
- }
-
-end:
- return ret;
-}
-
-static enum relay_connection_status relay_process_control_receive_payload(
- struct relay_connection *conn)
-{
- int ret = 0;
- enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK;
- struct lttng_dynamic_buffer *reception_buffer =
- &conn->protocol.ctrl.reception_buffer;
- struct ctrl_connection_state_receive_payload *state =
- &conn->protocol.ctrl.state.receive_payload;
- struct lttng_buffer_view payload_view;
-
- if (state->left_to_receive == 0) {
- /* Short-circuit for payload-less commands. */
- goto reception_complete;
- }
-
- ret = conn->sock->ops->recvmsg(conn->sock,
- reception_buffer->data + state->received,
- state->left_to_receive, MSG_DONTWAIT);
- if (ret < 0) {
- if (errno != EAGAIN && errno != EWOULDBLOCK) {
- PERROR("Unable to receive command payload on sock %d",
- conn->sock->fd);
- status = RELAY_CONNECTION_STATUS_ERROR;
- }
- goto end;
- } else if (ret == 0) {
- DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd);
- status = RELAY_CONNECTION_STATUS_CLOSED;
- goto end;
- }
-
- assert(ret > 0);
- assert(ret <= state->left_to_receive);
-
- state->left_to_receive -= ret;
- state->received += ret;
-
- if (state->left_to_receive > 0) {
- /*
- * Can't transition to the protocol's next state, wait to
- * receive the rest of the header.
- */
- DBG3("Partial reception of control connection protocol payload (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)",
- state->received, state->left_to_receive,
- conn->sock->fd);
- goto end;
- }
-
-reception_complete:
- DBG("Done receiving control command payload: fd = %i, payload size = %" PRIu64 " bytes",
- conn->sock->fd, state->received);
- /*
- * The payload required to process the command has been received.
- * A view to the reception buffer is forwarded to the various
- * commands and the state of the control is reset on success.
- *
- * Commands are responsible for sending their reply to the peer.
- */
- payload_view = lttng_buffer_view_from_dynamic_buffer(reception_buffer,
- 0, -1);
- ret = relay_process_control_command(conn,
- &state->header, &payload_view);
- if (ret < 0) {
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end;
- }
-
- ret = connection_reset_protocol_state(conn);
- if (ret) {
- status = RELAY_CONNECTION_STATUS_ERROR;
- }
-end:
- return status;
-}
-
-static enum relay_connection_status relay_process_control_receive_header(
- struct relay_connection *conn)
-{
- int ret = 0;
- enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK;
- struct lttcomm_relayd_hdr header;
- struct lttng_dynamic_buffer *reception_buffer =
- &conn->protocol.ctrl.reception_buffer;
- struct ctrl_connection_state_receive_header *state =
- &conn->protocol.ctrl.state.receive_header;
-
- assert(state->left_to_receive != 0);
-
- ret = conn->sock->ops->recvmsg(conn->sock,
- reception_buffer->data + state->received,
- state->left_to_receive, MSG_DONTWAIT);
- if (ret < 0) {
- if (errno != EAGAIN && errno != EWOULDBLOCK) {
- PERROR("Unable to receive control command header on sock %d",
- conn->sock->fd);
- status = RELAY_CONNECTION_STATUS_ERROR;
- }
- goto end;
- } else if (ret == 0) {
- DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd);
- status = RELAY_CONNECTION_STATUS_CLOSED;
- goto end;
- }
-
- assert(ret > 0);
- assert(ret <= state->left_to_receive);
-
- state->left_to_receive -= ret;
- state->received += ret;
-
- if (state->left_to_receive > 0) {
- /*
- * Can't transition to the protocol's next state, wait to
- * receive the rest of the header.
- */
- DBG3("Partial reception of control connection protocol header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)",
- state->received, state->left_to_receive,
- conn->sock->fd);
- goto end;
- }
-
- /* Transition to next state: receiving the command's payload. */
- conn->protocol.ctrl.state_id =
- CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD;
- memcpy(&header, reception_buffer->data, sizeof(header));
- header.circuit_id = be64toh(header.circuit_id);
- header.data_size = be64toh(header.data_size);
- header.cmd = be32toh(header.cmd);
- header.cmd_version = be32toh(header.cmd_version);
- memcpy(&conn->protocol.ctrl.state.receive_payload.header,
- &header, sizeof(header));
-
- DBG("Done receiving control command header: fd = %i, cmd = %" PRIu32 ", cmd_version = %" PRIu32 ", payload size = %" PRIu64 " bytes",
- conn->sock->fd, header.cmd, header.cmd_version,
- header.data_size);
-
- if (header.data_size > DEFAULT_NETWORK_RELAYD_CTRL_MAX_PAYLOAD_SIZE) {
- ERR("Command header indicates a payload (%" PRIu64 " bytes) that exceeds the maximal payload size allowed on a control connection.",
- header.data_size);
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end;
- }
-
- conn->protocol.ctrl.state.receive_payload.left_to_receive =
- header.data_size;
- conn->protocol.ctrl.state.receive_payload.received = 0;
- ret = lttng_dynamic_buffer_set_size(reception_buffer,
- header.data_size);
- if (ret) {
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end;
- }
-
- if (header.data_size == 0) {
- /*
- * Manually invoke the next state as the poll loop
- * will not wake-up to allow us to proceed further.
- */
- status = relay_process_control_receive_payload(conn);
- }
-end:
- return status;
-}
-
-/*
- * Process the commands received on the control socket
- */
-static enum relay_connection_status relay_process_control(
- struct relay_connection *conn)
-{
- enum relay_connection_status status;
-
- switch (conn->protocol.ctrl.state_id) {
- case CTRL_CONNECTION_STATE_RECEIVE_HEADER:
- status = relay_process_control_receive_header(conn);
- break;
- case CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD:
- status = relay_process_control_receive_payload(conn);
- break;
- default:
- ERR("Unknown control connection protocol state encountered.");
- abort();
- }
-
- return status;
-}
-
-/*
- * Handle index for a data stream.
- *
- * Called with the stream lock held.
- *
- * Return 0 on success else a negative value.
- */
-static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num,
- bool rotate_index, bool *flushed, uint64_t total_size)
-{
- int ret = 0;
- uint64_t data_offset;
- struct relay_index *index;
-
- /* Get data offset because we are about to update the index. */
- data_offset = htobe64(stream->tracefile_size_current);
-
- DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64,
- stream->stream_handle, net_seq_num, stream->tracefile_size_current);
-
- /*
- * Lookup for an existing index for that stream id/sequence
- * number. If it exists, the control thread has already received the
- * data for it, thus we need to write it to disk.
- */
- index = relay_index_get_by_id_or_create(stream, net_seq_num);
- if (!index) {
- ret = -1;
- goto end;
- }
-
- if (rotate_index || !stream->index_file) {
- const char *stream_path;
-
- /*
- * The data connection creates the stream's first index file.
- *
- * This can happen _after_ a ROTATE_STREAM command. In
- * other words, the data of the first packet of this stream
- * can be received after a ROTATE_STREAM command.
- *
- * The ROTATE_STREAM command changes the stream's path_name
- * to point to the "next" chunk. If a rotation is pending for
- * this stream, as indicated by "rotate_at_seq_num != -1ULL",
- * it means that we are still receiving data that belongs in the
- * stream's former path.
- *
- * In this very specific case, we must ensure that the index
- * file is created in the streams's former path,
- * "prev_path_name".
- *
- * All other rotations beyond the first one are not affected
- * by this problem since the actual rotation operation creates
- * the new chunk's index file.
- */
- stream_path = stream->rotate_at_seq_num == -1ULL ?
- stream->path_name:
- stream->prev_path_name;
-
- ret = create_rotate_index_file(stream, stream_path);
- if (ret < 0) {
- ERR("Failed to rotate index");
- /* Put self-ref for this index due to error. */
- relay_index_put(index);
- index = NULL;
- goto end;
- }
- }
-
- if (relay_index_set_file(index, stream->index_file, data_offset)) {
- ret = -1;
- /* Put self-ref for this index due to error. */
- relay_index_put(index);
- index = NULL;
- goto end;
- }
-
- ret = relay_index_try_flush(index);
- if (ret == 0) {
- tracefile_array_commit_seq(stream->tfa);
- stream->index_received_seqcount++;
- *flushed = true;
- } else if (ret > 0) {
- index->total_size = total_size;
- /* No flush. */
- ret = 0;
- } else {
- /*
- * ret < 0
- *
- * relay_index_try_flush is responsible for the self-reference
- * put of the index object on error.
- */
- ERR("relay_index_try_flush error %d", ret);
- ret = -1;
- }
-end:
- return ret;
-}
-
-static enum relay_connection_status relay_process_data_receive_header(
- struct relay_connection *conn)
-{
- int ret;
- enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK;
- struct data_connection_state_receive_header *state =
- &conn->protocol.data.state.receive_header;
- struct lttcomm_relayd_data_hdr header;
- struct relay_stream *stream;
-
- assert(state->left_to_receive != 0);
-
- ret = conn->sock->ops->recvmsg(conn->sock,
- state->header_reception_buffer + state->received,
- state->left_to_receive, MSG_DONTWAIT);
- if (ret < 0) {
- if (errno != EAGAIN && errno != EWOULDBLOCK) {
- PERROR("Unable to receive data header on sock %d", conn->sock->fd);
- status = RELAY_CONNECTION_STATUS_ERROR;
- }
- goto end;
- } else if (ret == 0) {
- /* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd);
- status = RELAY_CONNECTION_STATUS_CLOSED;
- goto end;
- }
-
- assert(ret > 0);
- assert(ret <= state->left_to_receive);
-
- state->left_to_receive -= ret;
- state->received += ret;
-
- if (state->left_to_receive > 0) {
- /*
- * Can't transition to the protocol's next state, wait to
- * receive the rest of the header.
- */
- DBG3("Partial reception of data connection header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)",
- state->received, state->left_to_receive,
- conn->sock->fd);
- goto end;
- }
-
- /* Transition to next state: receiving the payload. */
- conn->protocol.data.state_id = DATA_CONNECTION_STATE_RECEIVE_PAYLOAD;
-
- memcpy(&header, state->header_reception_buffer, sizeof(header));
- header.circuit_id = be64toh(header.circuit_id);
- header.stream_id = be64toh(header.stream_id);
- header.data_size = be32toh(header.data_size);
- header.net_seq_num = be64toh(header.net_seq_num);
- header.padding_size = be32toh(header.padding_size);
- memcpy(&conn->protocol.data.state.receive_payload.header, &header, sizeof(header));
-
- conn->protocol.data.state.receive_payload.left_to_receive =
- header.data_size;
- conn->protocol.data.state.receive_payload.received = 0;
- conn->protocol.data.state.receive_payload.rotate_index = false;
-
- DBG("Received data connection header on fd %i: circuit_id = %" PRIu64 ", stream_id = %" PRIu64 ", data_size = %" PRIu32 ", net_seq_num = %" PRIu64 ", padding_size = %" PRIu32,
- conn->sock->fd, header.circuit_id,
- header.stream_id, header.data_size,
- header.net_seq_num, header.padding_size);
-
- stream = stream_get_by_id(header.stream_id);
- if (!stream) {
- DBG("relay_process_data_receive_payload: Cannot find stream %" PRIu64,
- header.stream_id);
- /* Protocol error. */
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end;
- }
-
- pthread_mutex_lock(&stream->lock);
-
- /* Check if a rotation is needed. */
- if (stream->tracefile_size > 0 &&
- (stream->tracefile_size_current + header.data_size) >
- stream->tracefile_size) {
- uint64_t old_id, new_id;
-
- old_id = tracefile_array_get_file_index_head(stream->tfa);
- tracefile_array_file_rotate(stream->tfa);
-
- /* new_id is updated by utils_rotate_stream_file. */
- new_id = old_id;
-
- ret = utils_rotate_stream_file(stream->path_name,
- stream->channel_name, stream->tracefile_size,
- stream->tracefile_count, -1,
- -1, stream->stream_fd->fd,
- &new_id, &stream->stream_fd->fd);
- if (ret < 0) {
- ERR("Failed to rotate stream output file");
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end_stream_unlock;
- }
-
- /*
- * Reset current size because we just performed a stream
- * rotation.
- */
- stream->tracefile_size_current = 0;
- conn->protocol.data.state.receive_payload.rotate_index = true;
- }
-
-end_stream_unlock:
- pthread_mutex_unlock(&stream->lock);
- stream_put(stream);
-end:
- return status;
-}
-
-static enum relay_connection_status relay_process_data_receive_payload(
- struct relay_connection *conn)
-{
- int ret;
- enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK;
- struct relay_stream *stream;
- struct data_connection_state_receive_payload *state =
- &conn->protocol.data.state.receive_payload;
- const size_t chunk_size = RECV_DATA_BUFFER_SIZE;
- char data_buffer[chunk_size];
- bool partial_recv = false;
- bool new_stream = false, close_requested = false, index_flushed = false;
- uint64_t left_to_receive = state->left_to_receive;
- struct relay_session *session;
-
- DBG3("Receiving data for stream id %" PRIu64 " seqnum %" PRIu64 ", %" PRIu64" bytes received, %" PRIu64 " bytes left to receive",
- state->header.stream_id, state->header.net_seq_num,
- state->received, left_to_receive);
-
- stream = stream_get_by_id(state->header.stream_id);
- if (!stream) {
- /* Protocol error. */
- ERR("relay_process_data_receive_payload: cannot find stream %" PRIu64,
- state->header.stream_id);
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end;
- }
-
- pthread_mutex_lock(&stream->lock);
- session = stream->trace->session;
- if (!conn->session) {
- ret = connection_set_session(conn, session);
- if (ret) {
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end_stream_unlock;
- }
- }
-
- /*
- * The size of the "chunk" received on any iteration is bounded by:
- * - the data left to receive,
- * - the data immediately available on the socket,
- * - the on-stack data buffer
- */
- while (left_to_receive > 0 && !partial_recv) {
- ssize_t write_ret;
- size_t recv_size = min(left_to_receive, chunk_size);
-
- ret = conn->sock->ops->recvmsg(conn->sock, data_buffer,
- recv_size, MSG_DONTWAIT);
- if (ret < 0) {
- if (errno != EAGAIN && errno != EWOULDBLOCK) {
- PERROR("Socket %d error", conn->sock->fd);
- status = RELAY_CONNECTION_STATUS_ERROR;
- }
- goto end_stream_unlock;
- } else if (ret == 0) {
- /* No more data ready to be consumed on socket. */
- DBG3("No more data ready for consumption on data socket of stream id %" PRIu64,
- state->header.stream_id);
- status = RELAY_CONNECTION_STATUS_CLOSED;
- break;
- } else if (ret < (int) recv_size) {
- /*
- * All the data available on the socket has been
- * consumed.
- */
- partial_recv = true;
- }
-
- recv_size = ret;
-
- /* Write data to stream output fd. */
- write_ret = lttng_write(stream->stream_fd->fd, data_buffer,
- recv_size);
- if (write_ret < (ssize_t) recv_size) {
- ERR("Relay error writing data to file");
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end_stream_unlock;
- }
-
- left_to_receive -= recv_size;
- state->received += recv_size;
- state->left_to_receive = left_to_receive;
-
- DBG2("Relay wrote %zd bytes to tracefile for stream id %" PRIu64,
- write_ret, stream->stream_handle);
- }
-
- if (state->left_to_receive > 0) {
- /*
- * Did not receive all the data expected, wait for more data to
- * become available on the socket.
- */
- DBG3("Partial receive on data connection of stream id %" PRIu64 ", %" PRIu64 " bytes received, %" PRIu64 " bytes left to receive",
- state->header.stream_id, state->received,
- state->left_to_receive);
- goto end_stream_unlock;
- }
-
- ret = write_padding_to_file(stream->stream_fd->fd,
- state->header.padding_size);
- if ((int64_t) ret < (int64_t) state->header.padding_size) {
- ERR("write_padding_to_file: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d",
- stream->stream_handle,
- state->header.net_seq_num, ret);
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end_stream_unlock;
- }
-
-
- if (session_streams_have_index(session)) {
- ret = handle_index_data(stream, state->header.net_seq_num,
- state->rotate_index, &index_flushed, state->header.data_size + state->header.padding_size);
- if (ret < 0) {
- ERR("handle_index_data: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d",
- stream->stream_handle,
- state->header.net_seq_num, ret);
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end_stream_unlock;
- }
- }
-
- stream->tracefile_size_current += state->header.data_size +
- state->header.padding_size;
-
- if (stream->prev_data_seq == -1ULL) {
- new_stream = true;
- }
- if (index_flushed) {
- stream->pos_after_last_complete_data_index =
- stream->tracefile_size_current;
- stream->prev_index_seq = state->header.net_seq_num;
- }
-
- stream->prev_data_seq = state->header.net_seq_num;
-
- /*
- * Resetting the protocol state (to RECEIVE_HEADER) will trash the
- * contents of *state which are aliased (union) to the same location as
- * the new state. Don't use it beyond this point.
- */
- connection_reset_protocol_state(conn);
- state = NULL;
-
- ret = try_rotate_stream(stream);
- if (ret < 0) {
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end_stream_unlock;
- }
-
-end_stream_unlock:
- close_requested = stream->close_requested;
- pthread_mutex_unlock(&stream->lock);
- if (close_requested && left_to_receive == 0) {
- try_stream_close(stream);
- }
-
- if (new_stream) {
- pthread_mutex_lock(&session->lock);
- uatomic_set(&session->new_streams, 1);
- pthread_mutex_unlock(&session->lock);
- }
-
- stream_put(stream);
-end:
- return status;
-}
-
-/*
- * relay_process_data: Process the data received on the data socket
- */
-static enum relay_connection_status relay_process_data(
- struct relay_connection *conn)
-{
- enum relay_connection_status status;
-
- switch (conn->protocol.data.state_id) {
- case DATA_CONNECTION_STATE_RECEIVE_HEADER:
- status = relay_process_data_receive_header(conn);
- break;
- case DATA_CONNECTION_STATE_RECEIVE_PAYLOAD:
- status = relay_process_data_receive_payload(conn);
- break;
- default:
- ERR("Unexpected data connection communication state.");
- abort();
- }
-
- return status;
-}
-
-static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd)
-{
- int ret;
-
- (void) lttng_poll_del(events, pollfd);
-
- ret = close(pollfd);
- if (ret < 0) {
- ERR("Closing pollfd %d", pollfd);
- }
-}
-
-static void relay_thread_close_connection(struct lttng_poll_event *events,
- int pollfd, struct relay_connection *conn)
-{
- const char *type_str;
-
- switch (conn->type) {
- case RELAY_DATA:
- type_str = "Data";
- break;
- case RELAY_CONTROL:
- type_str = "Control";
- break;
- case RELAY_VIEWER_COMMAND:
- type_str = "Viewer Command";
- break;
- case RELAY_VIEWER_NOTIFICATION:
- type_str = "Viewer Notification";
- break;
- default:
- type_str = "Unknown";
- }
- cleanup_connection_pollfd(events, pollfd);
- connection_put(conn);
- DBG("%s connection closed with %d", type_str, pollfd);
-}
-
-/*
- * This thread does the actual work
- */
-static void *relay_thread_worker(void *data)
-{
- int ret, err = -1, last_seen_data_fd = -1;
- uint32_t nb_fd;
- struct lttng_poll_event events;
- struct lttng_ht *relay_connections_ht;
- struct lttng_ht_iter iter;
- struct relay_connection *destroy_conn = NULL;
-
- DBG("[thread] Relay worker started");
-
- rcu_register_thread();
-
- health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER);
-
- if (testpoint(relayd_thread_worker)) {
- goto error_testpoint;
- }
-
- health_code_update();
-
- /* table of connections indexed on socket */
- relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
- if (!relay_connections_ht) {
- goto relay_connections_ht_error;
- }
-
- ret = create_thread_poll_set(&events, 2);
- if (ret < 0) {
- goto error_poll_create;
- }
-
- ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP);
- if (ret < 0) {
- goto error;
- }
-
-restart:
- while (1) {
- int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1;
-
- health_code_update();
-
- /* Infinite blocking call, waiting for transmission */
- DBG3("Relayd worker thread polling...");
- health_poll_entry();
- ret = lttng_poll_wait(&events, -1);
- health_poll_exit();
- if (ret < 0) {
- /*
- * Restart interrupted system call.
- */
- if (errno == EINTR) {
- goto restart;
- }
- goto error;
- }
-
- nb_fd = ret;
-
- /*
- * Process control. The control connection is
- * prioritized so we don't starve it with high
- * throughput tracing data on the data connection.
- */
- for (i = 0; i < nb_fd; i++) {
- /* Fetch once the poll data */
- uint32_t revents = LTTNG_POLL_GETEV(&events, i);
- int pollfd = LTTNG_POLL_GETFD(&events, i);
-
- health_code_update();
-
- if (!revents) {
- /*
- * No activity for this FD (poll
- * implementation).
- */
- continue;
- }
-
- /* Thread quit pipe has been closed. Killing thread. */
- ret = check_thread_quit_pipe(pollfd, revents);
- if (ret) {
- err = 0;
- goto exit;
- }
-
- /* Inspect the relay conn pipe for new connection */
- if (pollfd == relay_conn_pipe[0]) {
- if (revents & LPOLLIN) {
- struct relay_connection *conn;
-
- ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn));
- if (ret < 0) {
- goto error;
- }
- lttng_poll_add(&events, conn->sock->fd,
- LPOLLIN | LPOLLRDHUP);
- connection_ht_add(relay_connections_ht, conn);
- DBG("Connection socket %d added", conn->sock->fd);
- } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
- ERR("Relay connection pipe error");
- goto error;
- } else {
- ERR("Unexpected poll events %u for sock %d", revents, pollfd);
- goto error;
- }
- } else {
- struct relay_connection *ctrl_conn;
-
- ctrl_conn = connection_get_by_sock(relay_connections_ht, pollfd);
- /* If not found, there is a synchronization issue. */
- assert(ctrl_conn);
-
- if (ctrl_conn->type == RELAY_DATA) {
- if (revents & LPOLLIN) {
- /*
- * Flag the last seen data fd not deleted. It will be
- * used as the last seen fd if any fd gets deleted in
- * this first loop.
- */
- last_notdel_data_fd = pollfd;
- }
- goto put_ctrl_connection;
- }
- assert(ctrl_conn->type == RELAY_CONTROL);
-
- if (revents & LPOLLIN) {
- enum relay_connection_status status;
-
- status = relay_process_control(ctrl_conn);
- if (status != RELAY_CONNECTION_STATUS_OK) {
- /*
- * On socket error flag the session as aborted to force
- * the cleanup of its stream otherwise it can leak
- * during the lifetime of the relayd.
- *
- * This prevents situations in which streams can be
- * left opened because an index was received, the
- * control connection is closed, and the data
- * connection is closed (uncleanly) before the packet's
- * data provided.
- *
- * Since the control connection encountered an error,
- * it is okay to be conservative and close the
- * session right now as we can't rely on the protocol
- * being respected anymore.
- */
- if (status == RELAY_CONNECTION_STATUS_ERROR) {
- session_abort(ctrl_conn->session);
- }
-
- /* Clear the connection on error or close. */
- relay_thread_close_connection(&events,
- pollfd,
- ctrl_conn);
- }
- seen_control = 1;
- } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
- relay_thread_close_connection(&events,
- pollfd, ctrl_conn);
- if (last_seen_data_fd == pollfd) {
- last_seen_data_fd = last_notdel_data_fd;
- }
- } else {
- ERR("Unexpected poll events %u for control sock %d",
- revents, pollfd);
- connection_put(ctrl_conn);
- goto error;
- }
- put_ctrl_connection:
- connection_put(ctrl_conn);
- }
- }
-
- /*
- * The last loop handled a control request, go back to poll to make
- * sure we prioritise the control socket.
- */
- if (seen_control) {
- continue;
- }
-
- if (last_seen_data_fd >= 0) {
- for (i = 0; i < nb_fd; i++) {
- int pollfd = LTTNG_POLL_GETFD(&events, i);
-
- health_code_update();
-
- if (last_seen_data_fd == pollfd) {
- idx = i;
- break;
- }
- }
- }
-
- /* Process data connection. */
- for (i = idx + 1; i < nb_fd; i++) {
- /* Fetch the poll data. */
- uint32_t revents = LTTNG_POLL_GETEV(&events, i);
- int pollfd = LTTNG_POLL_GETFD(&events, i);
- struct relay_connection *data_conn;
-
- health_code_update();
-
- if (!revents) {
- /* No activity for this FD (poll implementation). */
- continue;
- }
-
- /* Skip the command pipe. It's handled in the first loop. */
- if (pollfd == relay_conn_pipe[0]) {
- continue;
- }
-
- data_conn = connection_get_by_sock(relay_connections_ht, pollfd);
- if (!data_conn) {
- /* Skip it. Might be removed before. */
- continue;
- }
- if (data_conn->type == RELAY_CONTROL) {
- goto put_data_connection;
- }
- assert(data_conn->type == RELAY_DATA);
-
- if (revents & LPOLLIN) {
- enum relay_connection_status status;
-
- status = relay_process_data(data_conn);
- /* Connection closed or error. */
- if (status != RELAY_CONNECTION_STATUS_OK) {
- /*
- * On socket error flag the session as aborted to force
- * the cleanup of its stream otherwise it can leak
- * during the lifetime of the relayd.
- *
- * This prevents situations in which streams can be
- * left opened because an index was received, the
- * control connection is closed, and the data
- * connection is closed (uncleanly) before the packet's
- * data provided.
- *
- * Since the data connection encountered an error,
- * it is okay to be conservative and close the
- * session right now as we can't rely on the protocol
- * being respected anymore.
- */
- if (status == RELAY_CONNECTION_STATUS_ERROR) {
- session_abort(data_conn->session);
- }
- relay_thread_close_connection(&events, pollfd,
- data_conn);
- /*
- * Every goto restart call sets the last seen fd where
- * here we don't really care since we gracefully
- * continue the loop after the connection is deleted.
- */
- } else {
- /* Keep last seen port. */
- last_seen_data_fd = pollfd;
- connection_put(data_conn);
- goto restart;
- }
- } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
- relay_thread_close_connection(&events, pollfd,
- data_conn);
- } else {
- ERR("Unknown poll events %u for data sock %d",
- revents, pollfd);
- }
- put_data_connection:
- connection_put(data_conn);
- }
- last_seen_data_fd = -1;
- }
-
- /* Normal exit, no error */
- ret = 0;
-
-exit:
-error:
- /* Cleanup remaining connection object. */
- rcu_read_lock();
- cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter,
- destroy_conn,
- sock_n.node) {
- health_code_update();
-
- session_abort(destroy_conn->session);
-
- /*
- * No need to grab another ref, because we own
- * destroy_conn.
- */
- relay_thread_close_connection(&events, destroy_conn->sock->fd,
- destroy_conn);
- }
- rcu_read_unlock();
-
- lttng_poll_clean(&events);
-error_poll_create:
- lttng_ht_destroy(relay_connections_ht);
-relay_connections_ht_error:
- /* Close relay conn pipes */
- utils_close_pipe(relay_conn_pipe);
- if (err) {
- DBG("Thread exited with error");
- }
- DBG("Worker thread cleanup complete");
-error_testpoint:
- if (err) {
- health_error();
- ERR("Health error occurred in %s", __func__);
- }
- health_unregister(health_relayd);
- rcu_unregister_thread();
- lttng_relay_stop_threads();
- return NULL;
-}
-
-/*
- * Create the relay command pipe to wake thread_manage_apps.
- * Closed in cleanup().
- */
-static int create_relay_conn_pipe(void)
-{
- int ret;
-
- ret = utils_create_pipe_cloexec(relay_conn_pipe);
-
- return ret;
-}
-
-/*
- * main
- */
-int main(int argc, char **argv)
-{
- int ret = 0, retval = 0;
- void *status;
-
- /* Parse arguments */
- progname = argv[0];
- if (set_options(argc, argv)) {
- retval = -1;
- goto exit_options;
- }
-
- if (set_signal_handler()) {
- retval = -1;
- goto exit_options;
- }
-
- /* Try to create directory if -o, --output is specified. */
- if (opt_output_path) {
- if (*opt_output_path != '/') {
- ERR("Please specify an absolute path for -o, --output PATH");
- retval = -1;
- goto exit_options;
- }
-
- ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG,
- -1, -1);
- if (ret < 0) {
- ERR("Unable to create %s", opt_output_path);
- retval = -1;
- goto exit_options;
- }
- }
-
- /* Daemonize */
- if (opt_daemon || opt_background) {
- int i;
-
- ret = lttng_daemonize(&child_ppid, &recv_child_signal,
- !opt_background);
- if (ret < 0) {
- retval = -1;
- goto exit_options;
- }
-
- /*
- * We are in the child. Make sure all other file
- * descriptors are closed, in case we are called with
- * more opened file descriptors than the standard ones.
- */
- for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) {
- (void) close(i);
- }
- }
-
- /* Initialize thread health monitoring */
- health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES);
- if (!health_relayd) {
- PERROR("health_app_create error");
- retval = -1;
- goto exit_health_app_create;
- }
-
- /* Create thread quit pipe */
- if (init_thread_quit_pipe()) {
- retval = -1;
- goto exit_init_data;
- }
-
- /* Setup the thread apps communication pipe. */
- if (create_relay_conn_pipe()) {
- retval = -1;
- goto exit_init_data;
- }
-
- /* Init relay command queue. */
- cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail);
-
- /* Initialize communication library */
- lttcomm_init();
- lttcomm_inet_init();
-
- /* tables of sessions indexed by session ID */
- sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
- if (!sessions_ht) {
- retval = -1;
- goto exit_init_data;
- }
-
- /* tables of streams indexed by stream ID */
- relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
- if (!relay_streams_ht) {
- retval = -1;
- goto exit_init_data;
- }
-
- /* tables of streams indexed by stream ID */
- viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
- if (!viewer_streams_ht) {
- retval = -1;
- goto exit_init_data;
- }
-
- ret = utils_create_pipe(health_quit_pipe);
- if (ret) {
- retval = -1;
- goto exit_health_quit_pipe;
- }
-
- /* Create thread to manage the client socket */
- ret = pthread_create(&health_thread, default_pthread_attr(),
- thread_manage_health, (void *) NULL);
- if (ret) {
- errno = ret;
- PERROR("pthread_create health");
- retval = -1;
- goto exit_health_thread;
- }
-
- /* Setup the dispatcher thread */
- ret = pthread_create(&dispatcher_thread, default_pthread_attr(),
- relay_thread_dispatcher, (void *) NULL);
- if (ret) {
- errno = ret;
- PERROR("pthread_create dispatcher");
- retval = -1;
- goto exit_dispatcher_thread;
- }
-
- /* Setup the worker thread */
- ret = pthread_create(&worker_thread, default_pthread_attr(),
- relay_thread_worker, NULL);
- if (ret) {
- errno = ret;
- PERROR("pthread_create worker");
- retval = -1;
- goto exit_worker_thread;
- }
-
- /* Setup the listener thread */
- ret = pthread_create(&listener_thread, default_pthread_attr(),
- relay_thread_listener, (void *) NULL);
- if (ret) {
- errno = ret;
- PERROR("pthread_create listener");
- retval = -1;
- goto exit_listener_thread;
- }
-
- ret = relayd_live_create(live_uri);
- if (ret) {
- ERR("Starting live viewer threads");
- retval = -1;
- goto exit_live;
- }
-
- /*
- * This is where we start awaiting program completion (e.g. through
- * signal that asks threads to teardown).
- */
-
- ret = relayd_live_join();
- if (ret) {
- retval = -1;
- }
-exit_live:
-
- ret = pthread_join(listener_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join listener_thread");
- retval = -1;
- }
-
-exit_listener_thread:
- ret = pthread_join(worker_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join worker_thread");
- retval = -1;
- }
-
-exit_worker_thread:
- ret = pthread_join(dispatcher_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join dispatcher_thread");
- retval = -1;
- }
-exit_dispatcher_thread:
-
- ret = pthread_join(health_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join health_thread");
- retval = -1;
- }
-exit_health_thread:
-
- utils_close_pipe(health_quit_pipe);
-exit_health_quit_pipe:
-
-exit_init_data:
- health_app_destroy(health_relayd);
-exit_health_app_create:
-exit_options:
- /*
- * Wait for all pending call_rcu work to complete before tearing
- * down data structures. call_rcu worker may be trying to
- * perform lookups in those structures.
- */
- rcu_barrier();
- relayd_cleanup();
-
- /* Ensure all prior call_rcu are done. */
- rcu_barrier();
-
- if (!retval) {
- exit(EXIT_SUCCESS);
- } else {
- exit(EXIT_FAILURE);
- }
-}