/*
* 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,
*/
#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <getopt.h>
#include <grp.h>
#include <limits.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/config/config.h>
+#include <urcu/rculist.h>
#include "cmd.h"
#include "ctf-trace.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"
/* command line options */
char *opt_output_path;
-static int opt_daemon;
+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;
+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.
*/
-static int thread_quit_pipe[2] = { -1, -1 };
+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_cmd_pipe[2] = { -1, -1 };
+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;
-static uint64_t last_relay_session_id;
/*
* Relay command queue.
* The relay_thread_listener and relay_thread_dispatcher communicate with this
* queue.
*/
-static struct relay_cmd_queue relay_cmd_queue;
+static struct relay_conn_queue relay_conn_queue;
/* buffer allocated at startup, used to store the trace data */
static char *data_buffer;
static unsigned int data_buffer_size;
-/* We need those values for the file/dir creation. */
-static uid_t relayd_uid;
-static gid_t relayd_gid;
-
/* Global relay stream hash table. */
struct lttng_ht *relay_streams_ht;
/* Global relay viewer stream hash table. */
struct lttng_ht *viewer_streams_ht;
-/* Global hash table that stores relay index object. */
-struct lttng_ht *indexes_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' },
+ { NULL, 0, 0, 0, },
+};
+
+static const char *config_ignore_options[] = { "help", "config" };
/*
* usage function on stderr
*/
-static
-void usage(void)
+static void usage(void)
{
fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname);
fprintf(stderr, " -h, --help Display this usage.\n");
fprintf(stderr, " -d, --daemonize Start as a daemon.\n");
+ fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n");
fprintf(stderr, " -C, --control-port URL Control port listening.\n");
fprintf(stderr, " -D, --data-port URL Data port listening.\n");
+ fprintf(stderr, " -L, --live-port URL Live view port listening.\n");
fprintf(stderr, " -o, --output PATH Output path for traces. Must use an absolute path.\n");
fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n");
+ fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n");
+ fprintf(stderr, " -f --config Load daemon configuration file\n");
}
-static
-int parse_args(int argc, char **argv)
+/*
+ * 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 c;
- int ret = 0;
- char *default_address;
-
- static struct option long_options[] = {
- { "control-port", 1, 0, 'C', },
- { "data-port", 1, 0, 'D', },
- { "daemonize", 0, 0, 'd', },
- { "help", 0, 0, 'h', },
- { "output", 1, 0, 'o', },
- { "verbose", 0, 0, 'v', },
- { NULL, 0, 0, 0, },
- };
+ int ret;
- while (1) {
- int option_index = 0;
- c = getopt_long(argc, argv, "dhv" "C:D:o:",
- long_options, &option_index);
- if (c == -1) {
- break;
+ switch (opt) {
+ case 0:
+ fprintf(stderr, "option %s", optname);
+ if (arg) {
+ fprintf(stderr, " with arg %s\n", arg);
}
-
- switch (c) {
- case 0:
- fprintf(stderr, "option %s", long_options[option_index].name);
- if (optarg) {
- fprintf(stderr, " with arg %s\n", optarg);
- }
- break;
- case 'C':
- ret = uri_parse(optarg, &control_uri);
+ 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 exit;
+ goto end;
}
if (control_uri->port == 0) {
control_uri->port = DEFAULT_NETWORK_CONTROL_PORT;
}
- break;
- case 'D':
- ret = uri_parse(optarg, &data_uri);
+ }
+ 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 exit;
+ goto end;
}
if (data_uri->port == 0) {
data_uri->port = DEFAULT_NETWORK_DATA_PORT;
}
- break;
- case 'd':
- opt_daemon = 1;
- break;
- case 'h':
- usage();
- exit(EXIT_FAILURE);
- case 'o':
- ret = asprintf(&opt_output_path, "%s", optarg);
+ }
+ 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':
+ usage();
+ exit(EXIT_FAILURE);
+ 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 exit;
+ 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/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;
- case 'v':
- /* Verbose level can increase using multiple -v */
- lttng_opt_verbose += 1;
- break;
- default:
- /* Unknown option or other error.
- * Error is printed by getopt, just return */
- ret = -1;
+ }
+
+ 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://0.0.0.0:%d",
- DEFAULT_NETWORK_CONTROL_PORT);
+ 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;
}
free(default_address);
if (ret < 0) {
ERR("Invalid control URI specified");
+ retval = -1;
goto exit;
}
}
if (data_uri == NULL) {
- ret = asprintf(&default_address, "tcp://0.0.0.0:%d",
- DEFAULT_NETWORK_DATA_PORT);
+ 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;
}
free(default_address);
if (ret < 0) {
ERR("Invalid data URI specified");
+ retval = -1;
goto exit;
}
}
if (live_uri == NULL) {
- ret = asprintf(&default_address, "tcp://0.0.0.0:%d",
- DEFAULT_NETWORK_VIEWER_PORT);
+ 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;
}
free(default_address);
if (ret < 0) {
ERR("Invalid viewer control URI specified");
+ retval = -1;
goto exit;
}
}
exit:
- return ret;
+ 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 cleanup(void)
+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);
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)
+static int notify_thread_pipe(int wpipe)
{
- int ret;
+ ssize_t ret;
- do {
- ret = write(wpipe, "!", 1);
- } while (ret < 0 && errno == EINTR);
- if (ret < 0 || ret != 1) {
+ 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 threads by closing the thread quit pipe.
+ * Stop all relayd and relayd-live threads.
*/
-static
-void stop_threads(void)
+int lttng_relay_stop_threads(void)
{
- int ret;
+ int retval = 0;
/* Stopping all threads */
DBG("Terminating all threads");
- ret = notify_thread_pipe(thread_quit_pipe[1]);
- if (ret < 0) {
+ 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_cmd_queue.futex);
+ futex_nto1_wake(&relay_conn_queue.futex);
+
+ if (relayd_live_stop()) {
+ ERR("Error stopping live threads");
+ retval = -1;
+ }
+ return retval;
}
/*
* Simply stop all worker threads, leaving main() return gracefully after
* joining all threads and calling cleanup().
*/
-static
-void sighandler(int sig)
+static void sighandler(int sig)
{
switch (sig) {
case SIGPIPE:
return;
case SIGINT:
DBG("SIGINT caught");
- stop_threads();
+ if (lttng_relay_stop_threads()) {
+ ERR("Error stopping threads");
+ }
break;
case SIGTERM:
DBG("SIGTERM caught");
- stop_threads();
+ 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)
+static int set_signal_handler(void)
{
int ret = 0;
struct sigaction sa;
return ret;
}
- DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT");
+ if ((ret = sigaction(SIGUSR1, &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)
+static int init_thread_quit_pipe(void)
{
int 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)
+static int create_thread_poll_set(struct lttng_poll_event *events, int size)
{
int ret;
}
/* Add quit pipe */
- ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN);
+ ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR);
if (ret < 0) {
goto error;
}
*
* Return 1 if it was triggered else 0;
*/
-static
-int check_thread_quit_pipe(int fd, uint32_t events)
+static int check_thread_quit_pipe(int fd, uint32_t events)
{
if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) {
return 1;
/*
* Create and init socket from uri.
*/
-static
-struct lttcomm_sock *relay_init_sock(struct lttng_uri *uri)
+static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri)
{
int ret;
struct lttcomm_sock *sock = NULL;
return NULL;
}
-/*
- * Return nonzero if stream needs to be closed.
- */
-static
-int close_stream_check(struct relay_stream *stream)
-{
-
- if (stream->close_flag && stream->prev_seq == stream->last_net_seq_num) {
- /*
- * We are about to close the stream so set the data pending flag to 1
- * which will make the end data pending command skip the stream which
- * is now closed and ready. Note that after proceeding to a file close,
- * the written file is ready for reading.
- */
- stream->data_pending_check_done = 1;
- return 1;
- }
- return 0;
-}
-
/*
* This thread manages the listening for new connections on the network
*/
-static
-void *relay_thread_listener(void *data)
+static void *relay_thread_listener(void *data)
{
int i, ret, pollfd, err = -1;
- int val = 1;
uint32_t revents, nb_fd;
struct lttng_poll_event events;
struct lttcomm_sock *control_sock, *data_sock;
DBG("[thread] Relay listener started");
- control_sock = relay_init_sock(control_uri);
+ 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_init_sock(data_uri);
+ 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.
+ * 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_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.
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) {
goto error;
} else if (revents & LPOLLIN) {
/*
- * Get allocated in this thread,
- * enqueued to a global queue, dequeued
- * and freed in the worker thread.
+ * 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.
*/
- struct relay_command *relay_cmd;
+ int val = 1;
+ struct relay_connection *new_conn;
struct lttcomm_sock *newsock;
-
- relay_cmd = zmalloc(sizeof(struct relay_command));
- if (relay_cmd == NULL) {
- PERROR("relay command zmalloc");
- goto error;
- }
+ enum connection_type type;
if (pollfd == data_sock->fd) {
+ type = RELAY_DATA;
newsock = data_sock->ops->accept(data_sock);
- if (!newsock) {
- PERROR("accepting data sock");
- free(relay_cmd);
- goto error;
- }
- relay_cmd->type = RELAY_DATA;
- DBG("Relay data connection accepted, socket %d", newsock->fd);
+ 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);
- if (!newsock) {
- PERROR("accepting control sock");
- free(relay_cmd);
- goto error;
- }
- relay_cmd->type = RELAY_CONTROL;
- DBG("Relay control connection accepted, socket %d", newsock->fd);
+ 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(int));
+
+ ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val,
+ sizeof(val));
if (ret < 0) {
PERROR("setsockopt inet");
lttcomm_destroy_sock(newsock);
- free(relay_cmd);
goto error;
}
- relay_cmd->sock = newsock;
- /*
- * Lock free enqueue the request.
- */
- cds_wfq_enqueue(&relay_cmd_queue.queue, &relay_cmd->node);
+ 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_wfq_enqueue.
+ * Wake the dispatch queue futex.
+ * Implicit memory barrier with the
+ * exchange in cds_wfcq_enqueue.
*/
- futex_nto1_wake(&relay_cmd_queue.futex);
+ futex_nto1_wake(&relay_conn_queue.futex);
}
}
}
exit:
error:
error_poll_add:
+error_testpoint:
lttng_poll_clean(&events);
error_create_poll:
if (data_sock->fd >= 0) {
lttcomm_destroy_sock(control_sock);
error_sock_control:
if (err) {
- DBG("Thread exited with error");
+ health_error();
+ ERR("Health error occurred in %s", __func__);
}
+ health_unregister(health_relayd);
DBG("Relay listener thread cleanup complete");
- stop_threads();
+ lttng_relay_stop_threads();
return NULL;
}
/*
* This thread manages the dispatching of the requests to worker threads
*/
-static
-void *relay_thread_dispatcher(void *data)
+static void *relay_thread_dispatcher(void *data)
{
- int ret;
- struct cds_wfq_node *node;
- struct relay_command *relay_cmd = NULL;
+ 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();
+
while (!CMM_LOAD_SHARED(dispatch_thread_exit)) {
+ health_code_update();
+
/* Atomically prepare the queue futex */
- futex_nto1_prepare(&relay_cmd_queue.futex);
+ futex_nto1_prepare(&relay_conn_queue.futex);
do {
+ health_code_update();
+
/* Dequeue commands */
- node = cds_wfq_dequeue_blocking(&relay_cmd_queue.queue);
+ 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);
- relay_cmd = caa_container_of(node, struct relay_command, node);
- DBG("Dispatching request waiting on sock %d", relay_cmd->sock->fd);
+ 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 :)
+ * 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 :)
*/
- do {
- ret = write(relay_cmd_pipe[1], relay_cmd,
- sizeof(struct relay_command));
- } while (ret < 0 && errno == EINTR);
- free(relay_cmd);
- if (ret < 0 || ret != sizeof(struct relay_command)) {
- PERROR("write cmd pipe");
+ 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() */
- futex_nto1_wait(&relay_cmd_queue.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");
- stop_threads();
+ lttng_relay_stop_threads();
return NULL;
}
/*
- * Get stream from stream id.
- * Need to be called with RCU read-side lock held.
+ * Set index data from the control port to a given index object.
*/
-struct relay_stream *relay_stream_find_by_id(uint64_t stream_id)
-{
- struct lttng_ht_node_ulong *node;
- struct lttng_ht_iter iter;
- struct relay_stream *ret;
-
- lttng_ht_lookup(relay_streams_ht,
- (void *)((unsigned long) stream_id),
- &iter);
- node = lttng_ht_iter_get_node_ulong(&iter);
- if (node == NULL) {
- DBG("Relay stream %" PRIu64 " not found", stream_id);
- ret = NULL;
- goto end;
- }
-
- ret = caa_container_of(node, struct relay_stream, stream_n);
-
-end:
- return ret;
-}
-
-static
-void deferred_free_stream(struct rcu_head *head)
-{
- struct relay_stream *stream =
- caa_container_of(head, struct relay_stream, rcu_node);
-
- ctf_trace_try_destroy(stream->ctf_trace);
-
- free(stream->path_name);
- free(stream->channel_name);
- free(stream);
-}
-
-static
-void deferred_free_session(struct rcu_head *head)
-{
- struct relay_session *session =
- caa_container_of(head, struct relay_session, rcu_node);
- free(session);
-}
-
-/*
- * Close a given stream. The stream is freed using a call RCU.
- *
- * RCU read side lock MUST be acquired. If NO close_stream_check() was called
- * BEFORE the stream lock MUST be acquired.
- */
-static void destroy_stream(struct relay_stream *stream,
- struct lttng_ht *ctf_traces_ht)
-{
- int delret;
- struct relay_viewer_stream *vstream;
- struct lttng_ht_iter iter;
-
- assert(stream);
-
- delret = close(stream->fd);
- if (delret < 0) {
- PERROR("close stream");
- }
-
- if (stream->index_fd >= 0) {
- delret = close(stream->index_fd);
- if (delret < 0) {
- PERROR("close stream index_fd");
- }
- }
-
- vstream = live_find_viewer_stream_by_id(stream->stream_handle);
- if (vstream) {
- /*
- * Set the last good value into the viewer stream. This is done
- * right before the stream gets deleted from the hash table. The
- * lookup failure on the live thread side of a stream indicates
- * that the viewer stream index received value should be used.
- */
- vstream->total_index_received = stream->total_index_received;
- }
-
- /* Cleanup index of that stream. */
- relay_index_destroy_by_stream_id(stream->stream_handle);
-
- iter.iter.node = &stream->stream_n.node;
- delret = lttng_ht_del(relay_streams_ht, &iter);
- assert(!delret);
- iter.iter.node = &stream->ctf_trace_node.node;
- delret = lttng_ht_del(ctf_traces_ht, &iter);
- assert(!delret);
- call_rcu(&stream->rcu_node, deferred_free_stream);
- DBG("Closed tracefile %d from close stream", stream->fd);
-}
-
-/*
- * relay_delete_session: Free all memory associated with a session and
- * close all the FDs
- */
-static
-void relay_delete_session(struct relay_command *cmd,
- struct lttng_ht *sessions_ht)
-{
- struct lttng_ht_iter iter;
- struct lttng_ht_node_ulong *node;
- struct relay_stream *stream;
- int ret;
-
- if (!cmd->session) {
- return;
- }
-
- DBG("Relay deleting session %" PRIu64, cmd->session->id);
-
- rcu_read_lock();
- cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, node, node) {
- node = lttng_ht_iter_get_node_ulong(&iter);
- if (!node) {
- continue;
- }
- stream = caa_container_of(node, struct relay_stream, stream_n);
- if (stream->session == cmd->session) {
- destroy_stream(stream, cmd->ctf_traces_ht);
- }
- }
-
- /* Make this session not visible anymore. */
- iter.iter.node = &cmd->session->session_n.node;
- ret = lttng_ht_del(sessions_ht, &iter);
- assert(!ret);
- call_rcu(&cmd->session->rcu_node, deferred_free_session);
- rcu_read_unlock();
-}
-
-/*
- * Copy index data from the control port to a given index object.
- */
-static void copy_index_control_data(struct relay_index *index,
+static int set_index_control_data(struct relay_index *index,
struct lttcomm_relayd_index *data)
{
- assert(index);
- assert(data);
+ struct ctf_packet_index index_data;
/*
- * The index on disk is encoded in big endian, so we don't need to convert
- * the data received on the network. The data_offset value is NEVER
- * modified here and is updated by the data thread.
+ * The index on disk is encoded in big endian, so we don't need
+ * to convert the data received on the network. The data_offset
+ * value is NEVER modified here and is updated by the data
+ * thread.
*/
- index->index_data.packet_size = data->packet_size;
- index->index_data.content_size = data->content_size;
- index->index_data.timestamp_begin = data->timestamp_begin;
- index->index_data.timestamp_end = data->timestamp_end;
- index->index_data.events_discarded = data->events_discarded;
- index->index_data.stream_id = data->stream_id;
+ index_data.packet_size = data->packet_size;
+ index_data.content_size = data->content_size;
+ index_data.timestamp_begin = data->timestamp_begin;
+ index_data.timestamp_end = data->timestamp_end;
+ index_data.events_discarded = data->events_discarded;
+ index_data.stream_id = data->stream_id;
+ return relay_index_set_data(index, &index_data);
}
/*
*
* On success, send back the session id or else return a negative value.
*/
-static
-int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd,
- struct lttng_ht *sessions_ht)
+static int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
int ret = 0, send_ret;
struct relay_session *session;
struct lttcomm_relayd_status_session reply;
+ char session_name[NAME_MAX];
+ char hostname[HOST_NAME_MAX];
+ uint32_t live_timer = 0;
+ bool snapshot = false;
- assert(recv_hdr);
- assert(cmd);
+ memset(session_name, 0, NAME_MAX);
+ memset(hostname, 0, HOST_NAME_MAX);
memset(&reply, 0, sizeof(reply));
- session = zmalloc(sizeof(struct relay_session));
- if (session == NULL) {
- PERROR("relay session zmalloc");
- ret = -1;
- goto error;
+ switch (conn->minor) {
+ case 1:
+ case 2:
+ case 3:
+ break;
+ case 4: /* LTTng sessiond 2.4 */
+ default:
+ ret = cmd_create_session_2_4(conn, session_name,
+ hostname, &live_timer, &snapshot);
}
-
- session->id = ++last_relay_session_id;
- session->sock = cmd->sock;
- session->minor = cmd->minor;
- session->major = cmd->major;
- cmd->session = session;
-
- reply.session_id = htobe64(session->id);
-
- switch (cmd->minor) {
- case 4: /* LTTng sessiond 2.4 */
- default:
- ret = cmd_create_session_2_4(cmd, session);
- break;
+ if (ret < 0) {
+ goto send_reply;
}
- lttng_ht_node_init_ulong(&session->session_n,
- (unsigned long) session->id);
- lttng_ht_add_unique_ulong(sessions_ht,
- &session->session_n);
-
+ 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);
-error:
+ 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 = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0);
+ send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
if (send_ret < 0) {
ERR("Relayd sending session id");
ret = send_ret;
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(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd, struct lttng_ht *sessions_ht)
+static int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
- struct relay_session *session = cmd->session;
+ int ret;
+ ssize_t send_ret;
+ struct relay_session *session = conn->session;
struct relay_stream *stream = NULL;
struct lttcomm_relayd_status_stream reply;
- int ret, send_ret;
+ 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;
- if (!session || cmd->version_check_done == 0) {
+ if (!session || conn->version_check_done == 0) {
ERR("Trying to add a stream before version check");
ret = -1;
goto end_no_session;
}
- stream = zmalloc(sizeof(struct relay_stream));
- if (stream == NULL) {
- PERROR("relay stream zmalloc");
- ret = -1;
- goto end_no_session;
- }
-
- switch (cmd->minor) {
- case 1: /* LTTng sessiond 2.1 */
- ret = cmd_recv_stream_2_1(cmd, stream);
+ switch (session->minor) {
+ case 1: /* LTTng sessiond 2.1. Allocates path_name and channel_name. */
+ ret = cmd_recv_stream_2_1(conn, &path_name,
+ &channel_name);
break;
- case 2: /* LTTng sessiond 2.2 */
+ case 2: /* LTTng sessiond 2.2. Allocates path_name and channel_name. */
default:
- ret = cmd_recv_stream_2_2(cmd, stream);
+ ret = cmd_recv_stream_2_2(conn, &path_name,
+ &channel_name, &tracefile_size, &tracefile_count);
break;
}
if (ret < 0) {
- goto err_free_stream;
- }
-
- rcu_read_lock();
- stream->stream_handle = ++last_relay_stream_id;
- stream->prev_seq = -1ULL;
- stream->session = session;
- stream->index_fd = -1;
- stream->read_index_fd = -1;
- stream->ctf_trace = NULL;
- pthread_mutex_init(&stream->lock, NULL);
-
- ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG);
- if (ret < 0) {
- ERR("relay creating output directory");
- goto end;
- }
-
- /*
- * No need to use run_as API here because whatever we receives, the relayd
- * uses its own credentials for the stream files.
- */
- ret = utils_create_stream_file(stream->path_name, stream->channel_name,
- stream->tracefile_size, 0, relayd_uid, relayd_gid, NULL);
- if (ret < 0) {
- ERR("Create output file");
- goto end;
- }
- stream->fd = ret;
- if (stream->tracefile_size) {
- DBG("Tracefile %s/%s_0 created", stream->path_name, stream->channel_name);
- } else {
- DBG("Tracefile %s/%s created", stream->path_name, stream->channel_name);
+ goto send_reply;
}
- if (!strncmp(stream->channel_name, DEFAULT_METADATA_NAME, NAME_MAX)) {
- stream->metadata_flag = 1;
- /*
- * When we receive a new metadata stream, we create a new
- * ctf_trace and we assign this ctf_trace to all streams with
- * the same path.
- *
- * If later on we receive a new stream for the same ctf_trace,
- * we copy the information from the first hit in the HT to the
- * new stream.
- */
- stream->ctf_trace = ctf_trace_create();
- if (!stream->ctf_trace) {
- ret = -1;
- goto end;
- }
- stream->ctf_trace->refcount++;
- stream->ctf_trace->metadata_stream = stream;
+ trace = ctf_trace_get_by_path_or_create(session, path_name);
+ if (!trace) {
+ goto send_reply;
}
- ctf_trace_assign(cmd->ctf_traces_ht, stream);
+ /* This stream here has one reference on the trace. */
- lttng_ht_node_init_ulong(&stream->stream_n,
- (unsigned long) stream->stream_handle);
- lttng_ht_add_unique_ulong(relay_streams_ht,
- &stream->stream_n);
+ pthread_mutex_lock(&last_relay_stream_id_lock);
+ stream_handle = ++last_relay_stream_id;
+ pthread_mutex_unlock(&last_relay_stream_id_lock);
- lttng_ht_node_init_str(&stream->ctf_trace_node, stream->path_name);
- lttng_ht_add_str(cmd->ctf_traces_ht, &stream->ctf_trace_node);
+ /* We pass ownership of path_name and channel_name. */
+ stream = stream_create(trace, stream_handle, path_name,
+ channel_name, tracefile_size, tracefile_count);
+ path_name = NULL;
+ channel_name = NULL;
- DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name,
- stream->stream_handle);
+ /*
+ * Streams are the owners of their trace. Reference to trace is
+ * kept within stream_create().
+ */
+ ctf_trace_put(trace);
-end:
- reply.handle = htobe64(stream->stream_handle);
- /* send the session id to the client or a negative return code on error */
- if (ret < 0) {
+send_reply:
+ memset(&reply, 0, sizeof(reply));
+ reply.handle = htobe64(stream_handle);
+ if (!stream) {
reply.ret_code = htobe32(LTTNG_ERR_UNK);
- /* stream was not properly added to the ht, so free it */
- free(stream);
} else {
reply.ret_code = htobe32(LTTNG_OK);
}
- send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply,
+ send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
sizeof(struct lttcomm_relayd_status_stream), 0);
if (send_ret < 0) {
ERR("Relay sending stream id");
- ret = send_ret;
+ ret = (int) send_ret;
}
- rcu_read_unlock();
end_no_session:
- return ret;
-
-err_free_stream:
- free(stream->path_name);
- free(stream->channel_name);
- free(stream);
+ free(path_name);
+ free(channel_name);
return ret;
}
/*
* relay_close_stream: close a specific stream
*/
-static
-int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd)
+static int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
int ret, send_ret;
- struct relay_session *session = cmd->session;
+ 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 || cmd->version_check_done == 0) {
+ if (!session || conn->version_check_done == 0) {
ERR("Trying to close a stream before version check");
ret = -1;
goto end_no_session;
}
- ret = cmd->sock->ops->recvmsg(cmd->sock, &stream_info,
+ ret = conn->sock->ops->recvmsg(conn->sock, &stream_info,
sizeof(struct lttcomm_relayd_close_stream), 0);
if (ret < sizeof(struct lttcomm_relayd_close_stream)) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
} else {
ERR("Relay didn't receive valid add_stream struct size : %d", ret);
}
goto end_no_session;
}
- rcu_read_lock();
- stream = relay_stream_find_by_id(be64toh(stream_info.stream_id));
+ stream = stream_get_by_id(be64toh(stream_info.stream_id));
if (!stream) {
ret = -1;
- goto end_unlock;
+ goto end;
}
-
+ pthread_mutex_lock(&stream->lock);
+ stream->closed = true;
stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num);
- stream->close_flag = 1;
+ if (stream->is_metadata) {
+ struct relay_viewer_stream *vstream;
- if (close_stream_check(stream)) {
- destroy_stream(stream, cmd->ctf_traces_ht);
+ 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);
+ }
}
+ pthread_mutex_unlock(&stream->lock);
+ stream_put(stream);
-end_unlock:
- rcu_read_unlock();
-
+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 = cmd->sock->ops->sendmsg(cmd->sock, &reply,
+ send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
sizeof(struct lttcomm_relayd_generic_reply), 0);
if (send_ret < 0) {
ERR("Relay sending stream id");
/*
* relay_unknown_command: send -1 if received unknown command
*/
-static
-void relay_unknown_command(struct relay_command *cmd)
+static void relay_unknown_command(struct relay_connection *conn)
{
struct lttcomm_relayd_generic_reply reply;
int ret;
+ memset(&reply, 0, sizeof(reply));
reply.ret_code = htobe32(LTTNG_ERR_UNK);
- ret = cmd->sock->ops->sendmsg(cmd->sock, &reply,
+ ret = conn->sock->ops->sendmsg(conn->sock, &reply,
sizeof(struct lttcomm_relayd_generic_reply), 0);
if (ret < 0) {
ERR("Relay sending unknown command");
* 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(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd)
+static int relay_start(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
int ret = htobe32(LTTNG_OK);
struct lttcomm_relayd_generic_reply reply;
- struct relay_session *session = cmd->session;
+ 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 = ret;
- ret = cmd->sock->ops->sendmsg(cmd->sock, &reply,
+ ret = conn->sock->ops->sendmsg(conn->sock, &reply,
sizeof(struct lttcomm_relayd_generic_reply), 0);
if (ret < 0) {
ERR("Relay sending start ack");
*/
static int write_padding_to_file(int fd, uint32_t size)
{
- int ret = 0;
+ ssize_t ret = 0;
char *zeros;
if (size == 0) {
goto end;
}
- do {
- ret = write(fd, zeros, size);
- } while (ret < 0 && errno == EINTR);
- if (ret < 0 || ret != size) {
+ ret = lttng_write(fd, zeros, size);
+ if (ret < size) {
PERROR("write padding to file");
}
}
/*
- * relay_recv_metadata: receive the metada for the session.
+ * relay_recv_metadata: receive the metadata for the session.
*/
-static
-int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd)
+static int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
int ret = htobe32(LTTNG_OK);
- struct relay_session *session = cmd->session;
+ ssize_t size_ret;
+ struct relay_session *session = conn->session;
struct lttcomm_relayd_metadata_payload *metadata_struct;
struct relay_stream *metadata_stream;
uint64_t data_size, payload_size;
}
memset(data_buffer, 0, data_size);
DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size);
- ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0);
+ ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0);
if (ret < 0 || ret != data_size) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
} else {
ERR("Relay didn't receive the whole metadata");
}
}
metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer;
- rcu_read_lock();
- metadata_stream = relay_stream_find_by_id(
- be64toh(metadata_struct->stream_id));
+ metadata_stream = stream_get_by_id(be64toh(metadata_struct->stream_id));
if (!metadata_stream) {
ret = -1;
- goto end_unlock;
+ goto end;
}
- do {
- ret = write(metadata_stream->fd, metadata_struct->payload,
- payload_size);
- } while (ret < 0 && errno == EINTR);
- if (ret < 0 || ret != payload_size) {
+ pthread_mutex_lock(&metadata_stream->lock);
+
+ size_ret = lttng_write(metadata_stream->stream_fd->fd, metadata_struct->payload,
+ payload_size);
+ if (size_ret < payload_size) {
ERR("Relay error writing metadata on file");
ret = -1;
- goto end_unlock;
+ goto end_put;
}
- ret = write_padding_to_file(metadata_stream->fd,
+ ret = write_padding_to_file(metadata_stream->stream_fd->fd,
be32toh(metadata_struct->padding_size));
if (ret < 0) {
- goto end_unlock;
+ goto end_put;
}
- metadata_stream->ctf_trace->metadata_received +=
+
+ metadata_stream->metadata_received +=
payload_size + be32toh(metadata_struct->padding_size);
+ DBG2("Relay metadata written. Updated metadata_received %" PRIu64,
+ metadata_stream->metadata_received);
- DBG2("Relay metadata written");
+end_put:
+ pthread_mutex_unlock(&metadata_stream->lock);
+ stream_put(metadata_stream);
-end_unlock:
- rcu_read_unlock();
end:
return ret;
}
/*
* relay_send_version: send relayd version number
*/
-static
-int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd, struct lttng_ht *sessions_ht)
+static int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
int ret;
struct lttcomm_relayd_version reply, msg;
- assert(cmd);
-
- cmd->version_check_done = 1;
+ conn->version_check_done = 1;
/* Get version from the other side. */
- ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0);
+ ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0);
if (ret < 0 || ret != sizeof(msg)) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
} else {
ERR("Relay failed to receive the version values.");
}
goto end;
}
+ memset(&reply, 0, sizeof(reply));
reply.major = RELAYD_VERSION_COMM_MAJOR;
reply.minor = RELAYD_VERSION_COMM_MINOR;
if (reply.major != be32toh(msg.major)) {
DBG("Incompatible major versions (%u vs %u), deleting session",
reply.major, be32toh(msg.major));
- relay_delete_session(cmd, sessions_ht);
+ connection_put(conn);
ret = 0;
goto end;
}
- cmd->major = reply.major;
+ conn->major = reply.major;
/* We adapt to the lowest compatible version */
if (reply.minor <= be32toh(msg.minor)) {
- cmd->minor = reply.minor;
+ conn->minor = reply.minor;
} else {
- cmd->minor = be32toh(msg.minor);
+ conn->minor = be32toh(msg.minor);
}
reply.major = htobe32(reply.major);
reply.minor = htobe32(reply.minor);
- ret = cmd->sock->ops->sendmsg(cmd->sock, &reply,
+ ret = conn->sock->ops->sendmsg(conn->sock, &reply,
sizeof(struct lttcomm_relayd_version), 0);
if (ret < 0) {
ERR("Relay sending version");
}
- DBG("Version check done using protocol %u.%u", cmd->major,
- cmd->minor);
+ 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(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd)
+static int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
- struct relay_session *session = cmd->session;
+ struct relay_session *session = conn->session;
struct lttcomm_relayd_data_pending msg;
struct lttcomm_relayd_generic_reply reply;
struct relay_stream *stream;
DBG("Data pending command received");
- if (!session || cmd->version_check_done == 0) {
+ if (!session || conn->version_check_done == 0) {
ERR("Trying to check for data before version check");
ret = -1;
goto end_no_session;
}
- ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0);
+ ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0);
if (ret < sizeof(msg)) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
} else {
ERR("Relay didn't receive valid data_pending struct size : %d",
ret);
stream_id = be64toh(msg.stream_id);
last_net_seq_num = be64toh(msg.last_net_seq_num);
- rcu_read_lock();
- stream = relay_stream_find_by_id(stream_id);
+ stream = stream_get_by_id(stream_id);
if (stream == NULL) {
ret = -1;
- goto end_unlock;
+ goto end;
}
+ pthread_mutex_lock(&stream->lock);
+
DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64
" and last_seq %" PRIu64, stream_id, stream->prev_seq,
last_net_seq_num);
ret = 1;
}
- /* Pending check is now done. */
- stream->data_pending_check_done = 1;
+ stream->data_pending_check_done = true;
+ pthread_mutex_unlock(&stream->lock);
-end_unlock:
- rcu_read_unlock();
+ stream_put(stream);
+end:
+ memset(&reply, 0, sizeof(reply));
reply.ret_code = htobe32(ret);
- ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0);
+ ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
if (ret < 0) {
ERR("Relay data pending ret code failed");
}
/*
* 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.
+ * 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(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd)
+static int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
int ret;
uint64_t stream_id;
struct relay_stream *stream;
- struct lttng_ht_iter iter;
struct lttcomm_relayd_quiescent_control msg;
struct lttcomm_relayd_generic_reply reply;
DBG("Checking quiescent state on control socket");
- if (!cmd->session || cmd->version_check_done == 0) {
+ if (!conn->session || conn->version_check_done == 0) {
ERR("Trying to check for data before version check");
ret = -1;
goto end_no_session;
}
- ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0);
+ ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0);
if (ret < sizeof(msg)) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
} else {
ERR("Relay didn't receive valid begin data_pending struct size: %d",
ret);
}
stream_id = be64toh(msg.stream_id);
-
- rcu_read_lock();
- cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream,
- stream_n.node) {
- if (stream->stream_handle == stream_id) {
- stream->data_pending_check_done = 1;
- DBG("Relay quiescent control pending flag set to %" PRIu64,
- stream_id);
- break;
- }
- }
- rcu_read_unlock();
-
+ stream = stream_get_by_id(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, stream_id);
+ stream_put(stream);
+reply:
+ memset(&reply, 0, sizeof(reply));
reply.ret_code = htobe32(LTTNG_OK);
- ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0);
+ ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
if (ret < 0) {
ERR("Relay data quiescent control ret code failed");
}
}
/*
- * Initialize a data pending command. This means that a client is about to ask
- * for data pending for each stream he/she holds. Simply iterate over all
- * streams of a session and set the data_pending_check_done flag.
+ * 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(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd)
+static int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
int ret;
struct lttng_ht_iter iter;
uint64_t session_id;
assert(recv_hdr);
- assert(cmd);
+ assert(conn);
DBG("Init streams for data pending");
- if (!cmd->session || cmd->version_check_done == 0) {
+ if (!conn->session || conn->version_check_done == 0) {
ERR("Trying to check for data before version check");
ret = -1;
goto end_no_session;
}
- ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0);
+ ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0);
if (ret < sizeof(msg)) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
} else {
ERR("Relay didn't receive valid begin data_pending struct size: %d",
ret);
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.
+ * 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,
- stream_n.node) {
- if (stream->session->id == session_id) {
- stream->data_pending_check_done = 0;
+ node.node) {
+ if (!stream_get(stream)) {
+ continue;
+ }
+ if (stream->trace->session->id == 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);
- ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0);
+ ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
if (ret < 0) {
ERR("Relay begin data pending send reply failed");
}
}
/*
- * 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
- * inflight.
+ * 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(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd)
+static int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
int ret;
struct lttng_ht_iter iter;
uint64_t session_id;
uint32_t is_data_inflight = 0;
- assert(recv_hdr);
- assert(cmd);
-
DBG("End data pending command");
- if (!cmd->session || cmd->version_check_done == 0) {
+ if (!conn->session || conn->version_check_done == 0) {
ERR("Trying to check for data before version check");
ret = -1;
goto end_no_session;
}
- ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0);
+ ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0);
if (ret < sizeof(msg)) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
} else {
ERR("Relay didn't receive valid end data_pending struct size: %d",
ret);
session_id = be64toh(msg.session_id);
- /* Iterate over all streams to see if the begin data pending flag is set. */
+ /*
+ * 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,
- stream_n.node) {
- if (stream->session->id == session_id &&
- !stream->data_pending_check_done) {
- is_data_inflight = 1;
- DBG("Data is still in flight for stream %" PRIu64,
- stream->stream_handle);
- break;
+ node.node) {
+ if (!stream_get(stream)) {
+ continue;
+ }
+ if (stream->trace->session->id != session_id) {
+ stream_put(stream);
+ continue;
+ }
+ pthread_mutex_lock(&stream->lock);
+ if (!stream->data_pending_check_done) {
+ if (!stream->closed || !(((int64_t) (stream->prev_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);
- ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0);
+ ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
if (ret < 0) {
ERR("Relay end data pending send reply failed");
}
*
* Return 0 on success else a negative value.
*/
-static
-int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd)
+static int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
- int ret, send_ret, index_created = 0;
- struct relay_session *session = cmd->session;
+ int ret, send_ret;
+ struct relay_session *session = conn->session;
struct lttcomm_relayd_index index_info;
- struct relay_index *index, *wr_index = NULL;
+ struct relay_index *index;
struct lttcomm_relayd_generic_reply reply;
struct relay_stream *stream;
uint64_t net_seq_num;
- assert(cmd);
+ assert(conn);
DBG("Relay receiving index");
- if (!session || cmd->version_check_done == 0) {
+ if (!session || conn->version_check_done == 0) {
ERR("Trying to close a stream before version check");
ret = -1;
goto end_no_session;
}
- ret = cmd->sock->ops->recvmsg(cmd->sock, &index_info,
+ ret = conn->sock->ops->recvmsg(conn->sock, &index_info,
sizeof(index_info), 0);
if (ret < sizeof(index_info)) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
} else {
ERR("Relay didn't receive valid index struct size : %d", ret);
}
net_seq_num = be64toh(index_info.net_seq_num);
- rcu_read_lock();
- stream = relay_stream_find_by_id(be64toh(index_info.relay_stream_id));
+ stream = stream_get_by_id(be64toh(index_info.relay_stream_id));
if (!stream) {
+ ERR("stream_get_by_id not found");
ret = -1;
- goto end_rcu_unlock;
+ 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);
+ DBG("Received live beacon for stream %" PRIu64,
+ stream->stream_handle);
/*
- * Only flag a stream inactive when it has already received data.
+ * Only flag a stream inactive when it has already
+ * received data and no indexes are in flight.
*/
- if (stream->total_index_received > 0) {
- stream->beacon_ts_end = be64toh(index_info.timestamp_end);
+ if (stream->total_index_received > 0
+ && stream->indexes_in_flight == 0) {
+ stream->beacon_ts_end =
+ be64toh(index_info.timestamp_end);
}
ret = 0;
- goto end_rcu_unlock;
+ goto end_stream_put;
} else {
stream->beacon_ts_end = -1ULL;
}
- index = relay_index_find(stream->stream_handle, net_seq_num);
+ if (stream->ctf_stream_id == -1ULL) {
+ stream->ctf_stream_id = be64toh(index_info.stream_id);
+ }
+ index = relay_index_get_by_id_or_create(stream, net_seq_num);
if (!index) {
- /* A successful creation will add the object to the HT. */
- index = relay_index_create(stream->stream_handle, net_seq_num);
- if (!index) {
- goto end_rcu_unlock;
- }
- index_created = 1;
+ ret = -1;
+ ERR("relay_index_get_by_id_or_create index NULL");
+ goto end_stream_put;
}
-
- copy_index_control_data(index, &index_info);
-
- if (index_created) {
- /*
- * Try to add the relay index object to the hash table. If an object
- * already exist, destroy back the index created, set the data in this
- * object and write it on disk.
- */
- relay_index_add(index, &wr_index);
- if (wr_index) {
- copy_index_control_data(wr_index, &index_info);
- free(index);
- }
- } else {
- /* The index already exists so write it on disk. */
- wr_index = index;
+ if (set_index_control_data(index, &index_info)) {
+ ERR("set_index_control_data error");
+ relay_index_put(index);
+ ret = -1;
+ goto end_stream_put;
}
-
- /* Do we have a writable ready index to write on disk. */
- if (wr_index) {
- /* Starting at 2.4, create the index file if none available. */
- if (cmd->minor >= 4 && stream->index_fd < 0) {
- ret = index_create_file(stream->path_name, stream->channel_name,
- relayd_uid, relayd_gid, stream->tracefile_size,
- stream->tracefile_count_current);
- if (ret < 0) {
- goto end_rcu_unlock;
- }
- stream->index_fd = ret;
- }
-
- ret = relay_index_write(wr_index->fd, wr_index);
- if (ret < 0) {
- goto end_rcu_unlock;
- }
+ ret = relay_index_try_flush(index);
+ if (ret == 0) {
stream->total_index_received++;
+ } else if (ret > 0) {
+ /* no flush. */
+ ret = 0;
+ } else {
+ ERR("relay_index_try_flush error %d", ret);
+ relay_index_put(index);
+ ret = -1;
}
-end_rcu_unlock:
- rcu_read_unlock();
+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 = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0);
+ send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
if (send_ret < 0) {
ERR("Relay sending close index id reply");
ret = send_ret;
return ret;
}
+/*
+ * Receive the streams_sent message.
+ *
+ * Return 0 on success else a negative value.
+ */
+static int relay_streams_sent(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
+{
+ int ret, send_ret;
+ struct lttcomm_relayd_generic_reply reply;
+
+ assert(conn);
+
+ DBG("Relay receiving streams_sent");
+
+ if (!conn->session || conn->version_check_done == 0) {
+ 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 < 0) {
+ ERR("Relay sending sent_stream reply");
+ ret = send_ret;
+ } else {
+ /* Success. */
+ ret = 0;
+ }
+
+end_no_session:
+ return ret;
+}
+
/*
* Process the commands received on the control socket
*/
-static
-int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_command *cmd, struct relay_local_data *ctx)
+static int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
{
int ret = 0;
switch (be32toh(recv_hdr->cmd)) {
case RELAYD_CREATE_SESSION:
- ret = relay_create_session(recv_hdr, cmd, ctx->sessions_ht);
+ ret = relay_create_session(recv_hdr, conn);
break;
case RELAYD_ADD_STREAM:
- ret = relay_add_stream(recv_hdr, cmd, ctx->sessions_ht);
+ ret = relay_add_stream(recv_hdr, conn);
break;
case RELAYD_START_DATA:
- ret = relay_start(recv_hdr, cmd);
+ ret = relay_start(recv_hdr, conn);
break;
case RELAYD_SEND_METADATA:
- ret = relay_recv_metadata(recv_hdr, cmd);
+ ret = relay_recv_metadata(recv_hdr, conn);
break;
case RELAYD_VERSION:
- ret = relay_send_version(recv_hdr, cmd, ctx->sessions_ht);
+ ret = relay_send_version(recv_hdr, conn);
break;
case RELAYD_CLOSE_STREAM:
- ret = relay_close_stream(recv_hdr, cmd);
+ ret = relay_close_stream(recv_hdr, conn);
break;
case RELAYD_DATA_PENDING:
- ret = relay_data_pending(recv_hdr, cmd);
+ ret = relay_data_pending(recv_hdr, conn);
break;
case RELAYD_QUIESCENT_CONTROL:
- ret = relay_quiescent_control(recv_hdr, cmd);
+ ret = relay_quiescent_control(recv_hdr, conn);
break;
case RELAYD_BEGIN_DATA_PENDING:
- ret = relay_begin_data_pending(recv_hdr, cmd);
+ ret = relay_begin_data_pending(recv_hdr, conn);
break;
case RELAYD_END_DATA_PENDING:
- ret = relay_end_data_pending(recv_hdr, cmd);
+ ret = relay_end_data_pending(recv_hdr, conn);
break;
case RELAYD_SEND_INDEX:
- ret = relay_recv_index(recv_hdr, cmd);
+ ret = relay_recv_index(recv_hdr, conn);
+ break;
+ case RELAYD_STREAMS_SENT:
+ ret = relay_streams_sent(recv_hdr, conn);
break;
case RELAYD_UPDATE_SYNC_INFO:
default:
ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd));
- relay_unknown_command(cmd);
+ relay_unknown_command(conn);
ret = -1;
goto end;
}
/*
* Handle index for a data stream.
*
- * RCU read side lock MUST be acquired.
+ * 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,
int rotate_index)
{
- int ret = 0, index_created = 0;
- uint64_t stream_id, data_offset;
- struct relay_index *index, *wr_index = NULL;
-
- assert(stream);
+ int ret = 0;
+ uint64_t data_offset;
+ struct relay_index *index;
- stream_id = stream->stream_handle;
/* Get data offset because we are about to update the index. */
data_offset = htobe64(stream->tracefile_size_current);
+ DBG("handle_index_data: stream %" PRIu64 " data offset %" PRIu64,
+ stream->stream_handle, stream->tracefile_size_current);
+
/*
- * Lookup for an existing index for that stream id/sequence number. If on
- * exists, the control thread already received the data for it thus we need
- * to write it on disk.
+ * 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_find(stream_id, net_seq_num);
+ index = relay_index_get_by_id_or_create(stream, net_seq_num);
if (!index) {
- /* A successful creation will add the object to the HT. */
- index = relay_index_create(stream_id, net_seq_num);
- if (!index) {
- ret = -1;
- goto error;
- }
- index_created = 1;
+ ret = -1;
+ goto end;
}
- if (rotate_index || stream->index_fd < 0) {
- index->to_close_fd = stream->index_fd;
- ret = index_create_file(stream->path_name, stream->channel_name,
- relayd_uid, relayd_gid, stream->tracefile_size,
- stream->tracefile_count_current);
- if (ret < 0) {
- /* This will close the stream's index fd if one. */
- relay_index_free_safe(index);
- goto error;
+ if (rotate_index || !stream->index_fd) {
+ int fd;
+
+ /* Put ref on previous index_fd. */
+ if (stream->index_fd) {
+ stream_fd_put(stream->index_fd);
+ stream->index_fd = NULL;
}
- stream->index_fd = ret;
- }
- index->fd = stream->index_fd;
- index->index_data.offset = data_offset;
- if (index_created) {
- /*
- * Try to add the relay index object to the hash table. If an object
- * already exist, destroy back the index created and set the data.
- */
- relay_index_add(index, &wr_index);
- if (wr_index) {
- /* Copy back data from the created index. */
- wr_index->fd = index->fd;
- wr_index->to_close_fd = index->to_close_fd;
- wr_index->index_data.offset = data_offset;
- free(index);
+ fd = index_create_file(stream->path_name, stream->channel_name,
+ -1, -1, stream->tracefile_size,
+ stream->current_tracefile_id);
+ if (fd < 0) {
+ ret = -1;
+ /* Put self-ref for this index due to error. */
+ relay_index_put(index);
+ goto end;
+ }
+ stream->index_fd = stream_fd_create(fd);
+ if (!stream->index_fd) {
+ ret = -1;
+ if (close(fd)) {
+ PERROR("Error closing FD %d", fd);
+ }
+ /* Put self-ref for this index due to error. */
+ relay_index_put(index);
+ /* Will put the local ref. */
+ goto end;
}
- } else {
- /* The index already exists so write it on disk. */
- wr_index = index;
}
- /* Do we have a writable ready index to write on disk. */
- if (wr_index) {
- ret = relay_index_write(wr_index->fd, wr_index);
- if (ret < 0) {
- goto error;
- }
- stream->total_index_received++;
+ if (relay_index_set_fd(index, stream->index_fd, data_offset)) {
+ ret = -1;
+ /* Put self-ref for this index due to error. */
+ relay_index_put(index);
+ goto end;
}
-error:
+ ret = relay_index_try_flush(index);
+ if (ret == 0) {
+ stream->total_index_received++;
+ } else if (ret > 0) {
+ /* No flush. */
+ ret = 0;
+ } else {
+ /* Put self-ref for this index due to error. */
+ relay_index_put(index);
+ ret = -1;
+ }
+end:
return ret;
}
/*
* relay_process_data: Process the data received on the data socket
*/
-static
-int relay_process_data(struct relay_command *cmd)
+static int relay_process_data(struct relay_connection *conn)
{
int ret = 0, rotate_index = 0;
+ ssize_t size_ret;
struct relay_stream *stream;
struct lttcomm_relayd_data_hdr data_hdr;
uint64_t stream_id;
uint64_t net_seq_num;
uint32_t data_size;
+ struct relay_session *session;
+ bool new_stream = false;
- ret = cmd->sock->ops->recvmsg(cmd->sock, &data_hdr,
+ ret = conn->sock->ops->recvmsg(conn->sock, &data_hdr,
sizeof(struct lttcomm_relayd_data_hdr), 0);
if (ret <= 0) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
} else {
- ERR("Unable to receive data header on sock %d", cmd->sock->fd);
+ ERR("Unable to receive data header on sock %d", conn->sock->fd);
}
ret = -1;
goto end;
}
stream_id = be64toh(data_hdr.stream_id);
-
- rcu_read_lock();
- stream = relay_stream_find_by_id(stream_id);
+ stream = stream_get_by_id(stream_id);
if (!stream) {
ret = -1;
- goto end_rcu_unlock;
+ goto end;
}
-
+ session = stream->trace->session;
data_size = be32toh(data_hdr.data_size);
if (data_buffer_size < data_size) {
char *tmp_data_ptr;
ERR("Allocating data buffer");
free(data_buffer);
ret = -1;
- goto end_rcu_unlock;
+ goto end_stream_put;
}
data_buffer = tmp_data_ptr;
data_buffer_size = data_size;
DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64,
data_size, stream_id, net_seq_num);
- ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0);
+ ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0);
if (ret <= 0) {
if (ret == 0) {
/* Orderly shutdown. Not necessary to print an error. */
- DBG("Socket %d did an orderly shutdown", cmd->sock->fd);
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
}
ret = -1;
- goto end_rcu_unlock;
+ goto end_stream_put;
}
+ pthread_mutex_lock(&stream->lock);
+
/* Check if a rotation is needed. */
if (stream->tracefile_size > 0 &&
(stream->tracefile_size_current + data_size) >
stream->tracefile_size) {
- ret = utils_rotate_stream_file(stream->path_name, stream->channel_name,
- stream->tracefile_size, stream->tracefile_count,
- relayd_uid, relayd_gid, stream->fd,
- &(stream->tracefile_count_current), &stream->fd);
+ uint64_t new_id;
+
+ new_id = (stream->current_tracefile_id + 1) %
+ stream->tracefile_count;
+ /*
+ * Move viewer oldest available data position forward if
+ * we are overwriting a tracefile.
+ */
+ if (new_id == stream->oldest_tracefile_id) {
+ stream->oldest_tracefile_id =
+ (stream->oldest_tracefile_id + 1) %
+ stream->tracefile_count;
+ }
+ ret = utils_rotate_stream_file(stream->path_name,
+ stream->channel_name, stream->tracefile_size,
+ stream->tracefile_count, -1,
+ -1, stream->stream_fd->fd,
+ &stream->current_tracefile_id,
+ &stream->stream_fd->fd);
if (ret < 0) {
ERR("Rotating stream output file");
- goto end_rcu_unlock;
+ goto end_stream_unlock;
+ }
+ stream->current_tracefile_seq++;
+ if (stream->current_tracefile_seq
+ - stream->oldest_tracefile_seq >=
+ stream->tracefile_count) {
+ stream->oldest_tracefile_seq++;
}
- /* Reset current size because we just perform a stream rotation. */
+ /*
+ * Reset current size because we just performed a stream
+ * rotation.
+ */
stream->tracefile_size_current = 0;
rotate_index = 1;
}
/*
- * Index are handled in protocol version 2.4 and above. Also, snapshot and
- * index are NOT supported.
+ * Index are handled in protocol version 2.4 and above. Also,
+ * snapshot and index are NOT supported.
*/
- if (stream->session->minor >= 4 && !stream->session->snapshot) {
+ if (session->minor >= 4 && !session->snapshot) {
ret = handle_index_data(stream, net_seq_num, rotate_index);
if (ret < 0) {
- goto end_rcu_unlock;
+ goto end_stream_unlock;
}
}
/* Write data to stream output fd. */
- do {
- ret = write(stream->fd, data_buffer, data_size);
- } while (ret < 0 && errno == EINTR);
- if (ret < 0 || ret != data_size) {
+ size_ret = lttng_write(stream->stream_fd->fd, data_buffer, data_size);
+ if (size_ret < data_size) {
ERR("Relay error writing data to file");
ret = -1;
- goto end_rcu_unlock;
+ goto end_stream_unlock;
}
- DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64,
- ret, stream->stream_handle);
+ DBG2("Relay wrote %zd bytes to tracefile for stream id %" PRIu64,
+ size_ret, stream->stream_handle);
- ret = write_padding_to_file(stream->fd, be32toh(data_hdr.padding_size));
+ ret = write_padding_to_file(stream->stream_fd->fd,
+ be32toh(data_hdr.padding_size));
if (ret < 0) {
- goto end_rcu_unlock;
+ goto end_stream_unlock;
+ }
+ stream->tracefile_size_current +=
+ data_size + be32toh(data_hdr.padding_size);
+ if (stream->prev_seq == -1ULL) {
+ new_stream = true;
}
- stream->tracefile_size_current += data_size + be32toh(data_hdr.padding_size);
stream->prev_seq = net_seq_num;
- /* Check if we need to close the FD */
- if (close_stream_check(stream)) {
- destroy_stream(stream, cmd->ctf_traces_ht);
+end_stream_unlock:
+ pthread_mutex_unlock(&stream->lock);
+ if (new_stream) {
+ pthread_mutex_lock(&session->lock);
+ uatomic_set(&session->new_streams, 1);
+ pthread_mutex_unlock(&session->lock);
}
-
-end_rcu_unlock:
- rcu_read_unlock();
+end_stream_put:
+ stream_put(stream);
end:
return ret;
}
-static
-void relay_cleanup_poll_connection(struct lttng_poll_event *events, int pollfd)
+static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd)
{
int ret;
- lttng_poll_del(events, pollfd);
+ (void) lttng_poll_del(events, pollfd);
ret = close(pollfd);
if (ret < 0) {
}
}
-static
-int relay_add_connection(int fd, struct lttng_poll_event *events,
- struct lttng_ht *relay_connections_ht)
-{
- struct relay_command *relay_connection;
- int ret;
-
- relay_connection = zmalloc(sizeof(struct relay_command));
- if (relay_connection == NULL) {
- PERROR("Relay command zmalloc");
- goto error;
- }
- do {
- ret = read(fd, relay_connection, sizeof(struct relay_command));
- } while (ret < 0 && errno == EINTR);
- if (ret < 0 || ret < sizeof(struct relay_command)) {
- PERROR("read relay cmd pipe");
- goto error_read;
- }
-
- relay_connection->ctf_traces_ht = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
- if (!relay_connection->ctf_traces_ht) {
- goto error_read;
- }
-
- lttng_ht_node_init_ulong(&relay_connection->sock_n,
- (unsigned long) relay_connection->sock->fd);
- rcu_read_lock();
- lttng_ht_add_unique_ulong(relay_connections_ht,
- &relay_connection->sock_n);
- rcu_read_unlock();
- return lttng_poll_add(events,
- relay_connection->sock->fd,
- LPOLLIN | LPOLLRDHUP);
-
-error_read:
- free(relay_connection);
-error:
- return -1;
-}
-
-static
-void deferred_free_connection(struct rcu_head *head)
-{
- struct relay_command *relay_connection =
- caa_container_of(head, struct relay_command, rcu_node);
-
- lttng_ht_destroy(relay_connection->ctf_traces_ht);
- lttcomm_destroy_sock(relay_connection->sock);
- free(relay_connection);
-}
-
-static
-void relay_del_connection(struct lttng_ht *relay_connections_ht,
- struct lttng_ht_iter *iter, struct relay_command *relay_connection,
- struct lttng_ht *sessions_ht)
+static void relay_thread_close_connection(struct lttng_poll_event *events,
+ int pollfd, struct relay_connection *conn)
{
- int ret;
+ const char *type_str;
- ret = lttng_ht_del(relay_connections_ht, iter);
- assert(!ret);
- if (relay_connection->type == RELAY_CONTROL) {
- relay_delete_session(relay_connection, sessions_ht);
+ 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";
}
-
- call_rcu(&relay_connection->rcu_node,
- deferred_free_connection);
+ 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)
+static void *relay_thread_worker(void *data)
{
int ret, err = -1, last_seen_data_fd = -1;
uint32_t nb_fd;
- struct relay_command *relay_connection;
struct lttng_poll_event events;
struct lttng_ht *relay_connections_ht;
- struct lttng_ht_node_ulong *node;
struct lttng_ht_iter iter;
struct lttcomm_relayd_hdr recv_hdr;
- struct relay_local_data *relay_ctx = (struct relay_local_data *) data;
- struct lttng_ht *sessions_ht = relay_ctx->sessions_ht;
+ 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;
}
- /* Tables of received indexes indexed by index handle and net_seq_num. */
- indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64);
- if (!indexes_ht) {
- goto indexes_ht_error;
- }
-
ret = create_thread_poll_set(&events, 2);
if (ret < 0) {
goto error_poll_create;
}
- ret = lttng_poll_add(&events, relay_cmd_pipe[0], LPOLLIN | LPOLLRDHUP);
+ ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP);
if (ret < 0) {
goto error;
}
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.
nb_fd = ret;
/*
- * Process control. The control connection is prioritised so we don't
- * starve it with high throughout put tracing data on the data
- * connection.
+ * 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) {
goto exit;
}
- /* Inspect the relay cmd pipe for new connection */
- if (pollfd == relay_cmd_pipe[0]) {
+ /* Inspect the relay conn pipe for new connection */
+ if (pollfd == relay_conn_pipe[0]) {
if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
- ERR("Relay pipe error");
+ ERR("Relay connection pipe error");
goto error;
} else if (revents & LPOLLIN) {
- DBG("Relay command received");
- ret = relay_add_connection(relay_cmd_pipe[0],
- &events, relay_connections_ht);
+ 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) {
- rcu_read_lock();
- lttng_ht_lookup(relay_connections_ht,
- (void *)((unsigned long) pollfd),
- &iter);
- node = lttng_ht_iter_get_node_ulong(&iter);
- if (node == NULL) {
- DBG2("Relay sock %d not found", pollfd);
- rcu_read_unlock();
- goto error;
- }
- relay_connection = caa_container_of(node,
- struct relay_command, sock_n);
-
- if (revents & (LPOLLERR)) {
- ERR("POLL ERROR");
- relay_cleanup_poll_connection(&events, pollfd);
- relay_del_connection(relay_connections_ht,
- &iter, relay_connection, sessions_ht);
- if (last_seen_data_fd == pollfd) {
- last_seen_data_fd = last_notdel_data_fd;
- }
- } else if (revents & (LPOLLHUP | LPOLLRDHUP)) {
- DBG("Socket %d hung up", pollfd);
- relay_cleanup_poll_connection(&events, pollfd);
- relay_del_connection(relay_connections_ht,
- &iter, relay_connection, sessions_ht);
+ } 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 (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 if (revents & LPOLLIN) {
- /* control socket */
- if (relay_connection->type == RELAY_CONTROL) {
- ret = relay_connection->sock->ops->recvmsg(
- relay_connection->sock, &recv_hdr,
- sizeof(struct lttcomm_relayd_hdr), 0);
- /* connection closed */
+ if (ctrl_conn->type == RELAY_CONTROL) {
+ ret = ctrl_conn->sock->ops->recvmsg(ctrl_conn->sock, &recv_hdr,
+ sizeof(recv_hdr), 0);
if (ret <= 0) {
- relay_cleanup_poll_connection(&events, pollfd);
- relay_del_connection(relay_connections_ht,
- &iter, relay_connection, sessions_ht);
- DBG("Control connection closed with %d", pollfd);
+ /* Connection closed */
+ relay_thread_close_connection(&events, pollfd,
+ ctrl_conn);
} else {
- if (relay_connection->session) {
- DBG2("Relay worker receiving data for session : %" PRIu64,
- relay_connection->session->id);
- }
- ret = relay_process_control(&recv_hdr,
- relay_connection, relay_ctx);
+ ret = relay_process_control(&recv_hdr, ctrl_conn);
if (ret < 0) {
/* Clear the session on error. */
- relay_cleanup_poll_connection(&events, pollfd);
- relay_del_connection(relay_connections_ht,
- &iter, relay_connection, sessions_ht);
- DBG("Connection closed with %d", pollfd);
+ relay_thread_close_connection(&events, pollfd,
+ ctrl_conn);
}
seen_control = 1;
}
*/
last_notdel_data_fd = pollfd;
}
+ } else {
+ ERR("Unknown poll events %u for sock %d", revents, pollfd);
}
- rcu_read_unlock();
+ connection_put(ctrl_conn);
}
}
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;
/* 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_cmd_pipe[0]) {
+ if (pollfd == relay_conn_pipe[0]) {
continue;
}
- if (revents) {
- rcu_read_lock();
- lttng_ht_lookup(relay_connections_ht,
- (void *)((unsigned long) pollfd),
- &iter);
- node = lttng_ht_iter_get_node_ulong(&iter);
- if (node == NULL) {
- /* Skip it. Might be removed before. */
- rcu_read_unlock();
- continue;
- }
- relay_connection = caa_container_of(node,
- struct relay_command, sock_n);
+ data_conn = connection_get_by_sock(relay_connections_ht, pollfd);
+ if (!data_conn) {
+ /* Skip it. Might be removed before. */
+ continue;
+ }
- if (revents & LPOLLIN) {
- if (relay_connection->type != RELAY_DATA) {
- continue;
- }
+ if (revents & LPOLLIN) {
+ if (data_conn->type != RELAY_DATA) {
+ goto put_connection;
+ }
- ret = relay_process_data(relay_connection);
- /* connection closed */
- if (ret < 0) {
- relay_cleanup_poll_connection(&events, pollfd);
- relay_del_connection(relay_connections_ht,
- &iter, relay_connection, sessions_ht);
- DBG("Data connection closed with %d", pollfd);
- /*
- * 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;
- rcu_read_unlock();
- goto restart;
- }
+ ret = relay_process_data(data_conn);
+ /* Connection closed */
+ if (ret < 0) {
+ 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;
}
- rcu_read_unlock();
}
+ put_connection:
+ connection_put(data_conn);
}
last_seen_data_fd = -1;
}
+ /* Normal exit, no error */
+ ret = 0;
+
exit:
error:
- lttng_poll_clean(&events);
-
- /* empty the hash table and free the memory */
+ /* Cleanup reamaining connection object. */
rcu_read_lock();
- cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, node, node) {
- node = lttng_ht_iter_get_node_ulong(&iter);
- if (node) {
- relay_connection = caa_container_of(node,
- struct relay_command, sock_n);
- relay_del_connection(relay_connections_ht,
- &iter, relay_connection, sessions_ht);
- }
+ cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter,
+ destroy_conn,
+ sock_n.node) {
+ health_code_update();
+ /*
+ * 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(indexes_ht);
-indexes_ht_error:
lttng_ht_destroy(relay_connections_ht);
relay_connections_ht_error:
- /* Close relay cmd pipes */
- utils_close_pipe(relay_cmd_pipe);
+ /* Close relay conn pipes */
+ utils_close_pipe(relay_conn_pipe);
if (err) {
DBG("Thread exited with error");
}
DBG("Worker thread cleanup complete");
free(data_buffer);
- stop_threads();
+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_cmd_pipe(void)
+static int create_relay_conn_pipe(void)
{
int ret;
- ret = utils_create_pipe_cloexec(relay_cmd_pipe);
+ ret = utils_create_pipe_cloexec(relay_conn_pipe);
return ret;
}
*/
int main(int argc, char **argv)
{
- int ret = 0;
+ int ret = 0, retval = 0;
void *status;
- struct relay_local_data *relay_ctx;
-
- /* Create thread quit pipe */
- if ((ret = init_thread_quit_pipe()) < 0) {
- goto error;
- }
/* Parse arguments */
progname = argv[0];
- if ((ret = parse_args(argc, argv)) < 0) {
- goto exit;
+ if (set_options(argc, argv)) {
+ retval = -1;
+ goto exit_options;
}
- if ((ret = set_signal_handler()) < 0) {
- goto exit;
+ 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");
- goto exit;
+ retval = -1;
+ goto exit_options;
}
- ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG);
+ ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG,
+ -1, -1);
if (ret < 0) {
ERR("Unable to create %s", opt_output_path);
- goto exit;
+ retval = -1;
+ goto exit_options;
}
}
/* Daemonize */
- if (opt_daemon) {
- ret = daemon(0, 0);
+ if (opt_daemon || opt_background) {
+ int i;
+
+ ret = lttng_daemonize(&child_ppid, &recv_child_signal,
+ !opt_background);
if (ret < 0) {
- PERROR("daemon");
- goto exit;
+ 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);
}
}
- /* We need those values for the file/dir creation. */
- relayd_uid = getuid();
- relayd_gid = getgid();
+
+ /* 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;
+ }
/* Check if daemon is UID = 0 */
- if (relayd_uid == 0) {
- if (control_uri->port < 1024 || data_uri->port < 1024) {
+ if (!getuid()) {
+ if (control_uri->port < 1024 || data_uri->port < 1024 || live_uri->port < 1024) {
ERR("Need to be root to use ports < 1024");
- ret = -1;
- goto exit;
+ retval = -1;
+ goto exit_init_data;
}
}
/* Setup the thread apps communication pipe. */
- if ((ret = create_relay_cmd_pipe()) < 0) {
- goto exit;
+ if (create_relay_conn_pipe()) {
+ retval = -1;
+ goto exit_init_data;
}
/* Init relay command queue. */
- cds_wfq_init(&relay_cmd_queue.queue);
+ cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail);
/* Set up max poll set size */
- lttng_poll_set_max_size();
+ if (lttng_poll_set_max_size()) {
+ retval = -1;
+ goto exit_init_data;
+ }
/* Initialize communication library */
lttcomm_init();
-
- relay_ctx = zmalloc(sizeof(struct relay_local_data));
- if (!relay_ctx) {
- PERROR("relay_ctx");
- goto exit;
- }
+ lttcomm_inet_init();
/* tables of sessions indexed by session ID */
- relay_ctx->sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
- if (!relay_ctx->sessions_ht) {
- goto exit_relay_ctx_sessions;
+ 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_ULONG);
+ relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
if (!relay_streams_ht) {
- goto exit_relay_ctx_streams;
+ 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) {
- goto exit_relay_ctx_viewer_streams;
+ 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, NULL,
+ 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, NULL,
relay_thread_dispatcher, (void *) NULL);
- if (ret != 0) {
+ if (ret) {
+ errno = ret;
PERROR("pthread_create dispatcher");
- goto exit_dispatcher;
+ retval = -1;
+ goto exit_dispatcher_thread;
}
/* Setup the worker thread */
ret = pthread_create(&worker_thread, NULL,
- relay_thread_worker, (void *) relay_ctx);
- if (ret != 0) {
+ relay_thread_worker, NULL);
+ if (ret) {
+ errno = ret;
PERROR("pthread_create worker");
- goto exit_worker;
+ retval = -1;
+ goto exit_worker_thread;
}
/* Setup the listener thread */
ret = pthread_create(&listener_thread, NULL,
relay_thread_listener, (void *) NULL);
- if (ret != 0) {
+ if (ret) {
+ errno = ret;
PERROR("pthread_create listener");
- goto exit_listener;
+ retval = -1;
+ goto exit_listener_thread;
}
- ret = live_start_threads(live_uri, relay_ctx, thread_quit_pipe);
- if (ret != 0) {
+ ret = relayd_live_create(live_uri);
+ if (ret) {
ERR("Starting live viewer threads");
+ retval = -1;
goto exit_live;
}
- live_stop_threads();
+ /*
+ * 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 != 0) {
- PERROR("pthread_join");
- goto error; /* join error, exit without cleanup */
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join listener_thread");
+ retval = -1;
}
-exit_listener:
+exit_listener_thread:
ret = pthread_join(worker_thread, &status);
- if (ret != 0) {
- PERROR("pthread_join");
- goto error; /* join error, exit without cleanup */
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join worker_thread");
+ retval = -1;
}
-exit_worker:
+exit_worker_thread:
ret = pthread_join(dispatcher_thread, &status);
- if (ret != 0) {
- PERROR("pthread_join");
- goto error; /* join error, exit without cleanup */
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join dispatcher_thread");
+ retval = -1;
}
+exit_dispatcher_thread:
-exit_dispatcher:
- lttng_ht_destroy(viewer_streams_ht);
+ ret = pthread_join(health_thread, &status);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join health_thread");
+ retval = -1;
+ }
+exit_health_thread:
-exit_relay_ctx_viewer_streams:
- lttng_ht_destroy(relay_streams_ht);
+ utils_close_pipe(health_quit_pipe);
+exit_health_quit_pipe:
-exit_relay_ctx_streams:
- lttng_ht_destroy(relay_ctx->sessions_ht);
+exit_init_data:
+ health_app_destroy(health_relayd);
+exit_health_app_create:
+exit_options:
+ relayd_cleanup();
-exit_relay_ctx_sessions:
- free(relay_ctx);
+ /* Ensure all prior call_rcu are done. */
+ rcu_barrier();
-exit:
- cleanup();
- if (!ret) {
+ if (!retval) {
exit(EXIT_SUCCESS);
+ } else {
+ exit(EXIT_FAILURE);
}
-
-error:
- exit(EXIT_FAILURE);
}
projects / lttng-tools.git / blobdiff