-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
#include <assert.h>
+#include <errno.h>
#include <getopt.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <pthread.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/poll.h>
-#include <sys/time.h>
+#include <limits.h>
#include <signal.h>
-#include <errno.h>
-#include <ctype.h>
-#include <fcntl.h>
-#include <vector>
-#include <string>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <unistd.h>
#include <map>
#include <set>
+#include <string>
+#include <utility>
+#include <vector>
#include "acceptor.h"
+#include "accesslog.h"
#include "config.h"
+#include "input.h"
+#include "log.h"
#include "markpool.h"
-#include "metacube.h"
-#include "parse.h"
-#include "server.h"
#include "serverpool.h"
-#include "input.h"
+#include "state.pb.h"
#include "stats.h"
+#include "stream.h"
+#include "util.h"
#include "version.h"
-#include "state.pb.h"
using namespace std;
+AccessLogThread *access_log = NULL;
ServerPool *servers = NULL;
+vector<MarkPool *> mark_pools;
volatile bool hupped = false;
+volatile bool stopped = false;
-void hup(int ignored)
+struct InputWithRefcount {
+ Input *input;
+ int refcount;
+};
+
+void hup(int signum)
{
hupped = true;
+ if (signum == SIGINT) {
+ stopped = true;
+ }
}
-// Serialize the given state to a file descriptor, and return the (still open)
-// descriptor.
-int make_tempfile(const CubemapStateProto &state)
+void do_nothing(int signum)
{
- char tmpl[] = "/tmp/cubemapstate.XXXXXX";
- int state_fd = mkstemp(tmpl);
- if (state_fd == -1) {
- perror("mkstemp");
- exit(1);
- }
-
- string serialized;
- state.SerializeToString(&serialized);
-
- const char *ptr = serialized.data();
- size_t to_write = serialized.size();
- while (to_write > 0) {
- ssize_t ret = write(state_fd, ptr, to_write);
- if (ret == -1) {
- perror("write");
- exit(1);
- }
-
- ptr += ret;
- to_write -= ret;
- }
-
- return state_fd;
}
CubemapStateProto collect_state(const timeval &serialize_start,
const vector<Acceptor *> acceptors,
- const vector<Input *> inputs,
+ const multimap<string, InputWithRefcount> inputs,
ServerPool *servers)
{
CubemapStateProto state = servers->serialize(); // Fills streams() and clients().
state.add_acceptors()->MergeFrom(acceptors[i]->serialize());
}
- for (size_t i = 0; i < inputs.size(); ++i) {
- state.add_inputs()->MergeFrom(inputs[i]->serialize());
+ for (multimap<string, InputWithRefcount>::const_iterator input_it = inputs.begin();
+ input_it != inputs.end();
+ ++input_it) {
+ state.add_inputs()->MergeFrom(input_it->second.input->serialize());
}
return state;
}
-// Read the state back from the file descriptor made by make_tempfile,
-// and close it.
-CubemapStateProto read_tempfile(int state_fd)
-{
- if (lseek(state_fd, 0, SEEK_SET) == -1) {
- perror("lseek");
- exit(1);
- }
-
- string serialized;
- char buf[4096];
- for ( ;; ) {
- ssize_t ret = read(state_fd, buf, sizeof(buf));
- if (ret == -1) {
- perror("read");
- exit(1);
- }
- if (ret == 0) {
- // EOF.
- break;
- }
-
- serialized.append(string(buf, buf + ret));
- }
-
- close(state_fd); // Implicitly deletes the file.
-
- CubemapStateProto state;
- if (!state.ParseFromString(serialized)) {
- fprintf(stderr, "PANIC: Failed deserialization of state.\n");
- exit(1);
- }
-
- return state;
-}
-
// Find all port statements in the configuration file, and create acceptors for htem.
vector<Acceptor *> create_acceptors(
const Config &config,
}
// Find all streams in the configuration file, and create inputs for them.
-vector<Input *> create_inputs(const Config &config,
- map<string, Input *> *deserialized_inputs)
+void create_config_inputs(const Config &config, multimap<string, InputWithRefcount> *inputs)
{
- vector<Input *> inputs;
for (unsigned i = 0; i < config.streams.size(); ++i) {
const StreamConfig &stream_config = config.streams[i];
if (stream_config.src.empty()) {
continue;
}
- string stream_id = stream_config.stream_id;
string src = stream_config.src;
-
- Input *input = NULL;
- map<string, Input *>::iterator deserialized_input_it =
- deserialized_inputs->find(stream_id);
- if (deserialized_input_it != deserialized_inputs->end()) {
- input = deserialized_input_it->second;
- if (input->get_url() != src) {
- fprintf(stderr, "INFO: Stream '%s' has changed URL from '%s' to '%s', restarting input.\n",
- stream_id.c_str(), input->get_url().c_str(), src.c_str());
- input->close_socket();
- delete input;
- input = NULL;
- }
- deserialized_inputs->erase(deserialized_input_it);
+ if (inputs->count(src) != 0) {
+ continue;
}
- if (input == NULL) {
- input = create_input(stream_id, src);
- if (input == NULL) {
- fprintf(stderr, "ERROR: did not understand URL '%s', clients will not get any data.\n",
- src.c_str());
- continue;
- }
+
+ InputWithRefcount iwr;
+ iwr.input = create_input(src);
+ if (iwr.input == NULL) {
+ log(ERROR, "did not understand URL '%s', clients will not get any data.",
+ src.c_str());
+ continue;
}
- input->run();
- inputs.push_back(input);
+ iwr.refcount = 0;
+ inputs->insert(make_pair(src, iwr));
}
- return inputs;
}
void create_streams(const Config &config,
const set<string> &deserialized_stream_ids,
- map<string, Input *> *deserialized_inputs)
+ multimap<string, InputWithRefcount> *inputs)
{
- vector<MarkPool *> mark_pools; // FIXME: leak
for (unsigned i = 0; i < config.mark_pools.size(); ++i) {
const MarkPoolConfig &mp_config = config.mark_pools[i];
mark_pools.push_back(new MarkPool(mp_config.from, mp_config.to));
for (unsigned i = 0; i < config.streams.size(); ++i) {
const StreamConfig &stream_config = config.streams[i];
if (deserialized_stream_ids.count(stream_config.stream_id) == 0) {
- servers->add_stream(stream_config.stream_id);
+ servers->add_stream(stream_config.stream_id,
+ stream_config.backlog_size,
+ Stream::Encoding(stream_config.encoding));
+ } else {
+ servers->set_backlog_size(stream_config.stream_id, stream_config.backlog_size);
+ servers->set_encoding(stream_config.stream_id,
+ Stream::Encoding(stream_config.encoding));
}
expecting_stream_ids.erase(stream_config.stream_id);
servers->set_mark_pool(stream_config.stream_id,
mark_pools[stream_config.mark_pool]);
}
+
+ string src = stream_config.src;
+ if (!src.empty()) {
+ multimap<string, InputWithRefcount>::iterator input_it = inputs->find(src);
+ assert(input_it != inputs->end());
+ input_it->second.input->add_destination(stream_config.stream_id);
+ ++input_it->second.refcount;
+ }
}
// Warn about any servers we've lost.
stream_it != expecting_stream_ids.end();
++stream_it) {
string stream_id = *stream_it;
- fprintf(stderr, "WARNING: stream '%s' disappeared from the configuration file.\n",
- stream_id.c_str());
- fprintf(stderr, " It will not be deleted, but clients will not get any new inputs.\n");
- if (deserialized_inputs->count(stream_id) != 0) {
- delete (*deserialized_inputs)[stream_id];
- deserialized_inputs->erase(stream_id);
+ log(WARNING, "stream '%s' disappeared from the configuration file. "
+ "It will not be deleted, but clients will not get any new inputs.",
+ stream_id.c_str());
+ }
+}
+
+void open_logs(const vector<LogConfig> &log_destinations)
+{
+ for (size_t i = 0; i < log_destinations.size(); ++i) {
+ if (log_destinations[i].type == LogConfig::LOG_TYPE_FILE) {
+ add_log_destination_file(log_destinations[i].filename);
+ } else if (log_destinations[i].type == LogConfig::LOG_TYPE_CONSOLE) {
+ add_log_destination_console();
+ } else if (log_destinations[i].type == LogConfig::LOG_TYPE_SYSLOG) {
+ add_log_destination_syslog();
+ } else {
+ assert(false);
}
}
+ start_logging();
+}
+
+bool dry_run_config(const std::string &argv0, const std::string &config_filename)
+{
+ char *argv0_copy = strdup(argv0.c_str());
+ char *config_filename_copy = strdup(config_filename.c_str());
+
+ pid_t pid = fork();
+ switch (pid) {
+ case -1:
+ log_perror("fork()");
+ free(argv0_copy);
+ free(config_filename_copy);
+ return false;
+ case 0:
+ // Child.
+ execlp(argv0_copy, argv0_copy, "--test-config", config_filename_copy, NULL);
+ log_perror(argv0_copy);
+ _exit(1);
+ default:
+ // Parent.
+ break;
+ }
+
+ free(argv0_copy);
+ free(config_filename_copy);
+
+ int status;
+ pid_t err;
+ do {
+ err = waitpid(pid, &status, 0);
+ } while (err == -1 && errno == EINTR);
+
+ if (err == -1) {
+ log_perror("waitpid()");
+ return false;
+ }
+
+ return (WIFEXITED(status) && WEXITSTATUS(status) == 0);
}
int main(int argc, char **argv)
{
- fprintf(stderr, "\nCubemap " SERVER_VERSION " starting.\n");
-
+ signal(SIGHUP, hup);
+ signal(SIGINT, hup);
+ signal(SIGUSR1, do_nothing); // Used in internal signalling.
+ signal(SIGPIPE, SIG_IGN);
+
// Parse options.
int state_fd = -1;
+ bool test_config = false;
for ( ;; ) {
static const option long_options[] = {
{ "state", required_argument, 0, 's' },
+ { "test-config", no_argument, 0, 't' },
+ { 0, 0, 0, 0 }
};
int option_index = 0;
- int c = getopt_long (argc, argv, "s:", long_options, &option_index);
+ int c = getopt_long(argc, argv, "s:t", long_options, &option_index);
if (c == -1) {
break;
case 's':
state_fd = atoi(optarg);
break;
+ case 't':
+ test_config = true;
+ break;
default:
- assert(false);
+ fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
+ exit(1);
}
}
config_filename = argv[optind++];
}
- struct timeval serialize_start;
+ // Canonicalize argv[0] and config_filename.
+ char argv0_canon[PATH_MAX];
+ char config_filename_canon[PATH_MAX];
+
+ if (realpath(argv[0], argv0_canon) == NULL) {
+ log_perror(argv[0]);
+ exit(1);
+ }
+ if (realpath(config_filename.c_str(), config_filename_canon) == NULL) {
+ log_perror(config_filename.c_str());
+ exit(1);
+ }
+ // Now parse the configuration file.
Config config;
- if (!parse_config(config_filename, &config)) {
+ if (!parse_config(config_filename_canon, &config)) {
exit(1);
}
+ if (test_config) {
+ exit(0);
+ }
+
+ // Ideally we'd like to daemonize only when we've started up all threads etc.,
+ // but daemon() forks, which is not good in multithreaded software, so we'll
+ // have to do it here.
+ if (config.daemonize) {
+ if (daemon(0, 0) == -1) {
+ log_perror("daemon");
+ exit(1);
+ }
+ }
+
+start:
+ // Open logs as soon as possible.
+ open_logs(config.log_destinations);
+
+ log(INFO, "Cubemap " SERVER_VERSION " starting.");
+ if (config.access_log_file.empty()) {
+ // Create a dummy logger.
+ access_log = new AccessLogThread();
+ } else {
+ access_log = new AccessLogThread(config.access_log_file);
+ }
+ access_log->run();
servers = new ServerPool(config.num_servers);
CubemapStateProto loaded_state;
+ struct timeval serialize_start;
set<string> deserialized_stream_ids;
- map<string, Input *> deserialized_inputs;
map<int, Acceptor *> deserialized_acceptors;
+ multimap<string, InputWithRefcount> inputs; // multimap due to older versions without deduplication.
if (state_fd != -1) {
- fprintf(stderr, "Deserializing state from previous process... ");
- loaded_state = read_tempfile(state_fd);
+ log(INFO, "Deserializing state from previous process...");
+ string serialized;
+ if (!read_tempfile(state_fd, &serialized)) {
+ exit(1);
+ }
+ if (!loaded_state.ParseFromString(serialized)) {
+ log(ERROR, "Failed deserialization of state.");
+ exit(1);
+ }
serialize_start.tv_sec = loaded_state.serialize_start_sec();
serialize_start.tv_usec = loaded_state.serialize_start_usec();
// Deserialize the streams.
for (int i = 0; i < loaded_state.streams_size(); ++i) {
- servers->add_stream_from_serialized(loaded_state.streams(i));
- deserialized_stream_ids.insert(loaded_state.streams(i).stream_id());
+ const StreamProto &stream = loaded_state.streams(i);
+
+ vector<int> data_fds;
+ for (int j = 0; j < stream.data_fds_size(); ++j) {
+ data_fds.push_back(stream.data_fds(j));
+ }
+
+ // Older versions stored the data once in the protobuf instead of
+ // sending around file descriptors.
+ if (data_fds.empty() && stream.has_data()) {
+ data_fds.push_back(make_tempfile(stream.data()));
+ }
+
+ servers->add_stream_from_serialized(stream, data_fds);
+ deserialized_stream_ids.insert(stream.stream_id());
}
- // Deserialize the inputs. Note that we don't actually add them to any state yet.
+ // Deserialize the inputs. Note that we don't actually add them to any stream yet.
for (int i = 0; i < loaded_state.inputs_size(); ++i) {
- deserialized_inputs.insert(make_pair(
- loaded_state.inputs(i).stream_id(),
- create_input(loaded_state.inputs(i))));
+ InputWithRefcount iwr;
+ iwr.input = create_input(loaded_state.inputs(i));
+ iwr.refcount = 0;
+ inputs.insert(make_pair(loaded_state.inputs(i).url(), iwr));
}
// Deserialize the acceptors.
new Acceptor(loaded_state.acceptors(i))));
}
- fprintf(stderr, "done.\n");
+ log(INFO, "Deserialization done.");
}
- // Find all streams in the configuration file, and create them.
- create_streams(config, deserialized_stream_ids, &deserialized_inputs);
-
- servers->run();
-
- vector<Acceptor *> acceptors = create_acceptors(config, &deserialized_acceptors);
- vector<Input *> inputs = create_inputs(config, &deserialized_inputs);
+ // Add any new inputs coming from the config.
+ create_config_inputs(config, &inputs);
- // All deserialized inputs should now have been taken care of, one way or the other.
- assert(deserialized_inputs.empty());
+ // Find all streams in the configuration file, create them, and connect to the inputs.
+ create_streams(config, deserialized_stream_ids, &inputs);
+ vector<Acceptor *> acceptors = create_acceptors(config, &deserialized_acceptors);
// Put back the existing clients. It doesn't matter which server we
// allocate them to, so just do round-robin. However, we need to add
for (int i = 0; i < loaded_state.clients_size(); ++i) {
servers->add_client_from_serialized(loaded_state.clients(i));
}
+
+ servers->run();
+
+ // Now delete all inputs that are longer in use, and start the others.
+ for (multimap<string, InputWithRefcount>::iterator input_it = inputs.begin();
+ input_it != inputs.end(); ) {
+ if (input_it->second.refcount == 0) {
+ log(WARNING, "Input '%s' no longer in use, closing.",
+ input_it->first.c_str());
+ input_it->second.input->close_socket();
+ delete input_it->second.input;
+ inputs.erase(input_it++);
+ } else {
+ input_it->second.input->run();
+ ++input_it;
+ }
+ }
// Start writing statistics.
StatsThread *stats_thread = NULL;
if (!config.stats_file.empty()) {
stats_thread = new StatsThread(config.stats_file, config.stats_interval);
stats_thread->run();
- } else if (config.stats_interval != -1) {
- fprintf(stderr, "WARNING: 'stats_interval' given, but no 'stats_file'. No statistics will be written.\n");
}
- signal(SIGHUP, hup);
-
struct timeval server_start;
gettimeofday(&server_start, NULL);
if (state_fd != -1) {
// “glitch” period was, not counting of course reconnects if the configuration changed.
double glitch_time = server_start.tv_sec - serialize_start.tv_sec +
1e-6 * (server_start.tv_usec - serialize_start.tv_usec);
- fprintf(stderr, "Re-exec happened in approx. %.0f ms.\n", glitch_time * 1000.0);
+ log(INFO, "Re-exec happened in approx. %.0f ms.", glitch_time * 1000.0);
}
while (!hupped) {
if (stats_thread != NULL) {
stats_thread->stop();
+ delete stats_thread;
}
for (size_t i = 0; i < acceptors.size(); ++i) {
acceptors[i]->stop();
}
- for (size_t i = 0; i < inputs.size(); ++i) {
- inputs[i]->stop();
+ for (multimap<string, InputWithRefcount>::iterator input_it = inputs.begin();
+ input_it != inputs.end();
+ ++input_it) {
+ input_it->second.input->stop();
}
servers->stop();
- fprintf(stderr, "Serializing state and re-execing...\n");
- state_fd = make_tempfile(collect_state(
- serialize_start, acceptors, inputs, servers));
+ CubemapStateProto state;
+ if (stopped) {
+ log(INFO, "Shutting down.");
+ } else {
+ log(INFO, "Serializing state and re-execing...");
+ state = collect_state(
+ serialize_start, acceptors, inputs, servers);
+ string serialized;
+ state.SerializeToString(&serialized);
+ state_fd = make_tempfile(serialized);
+ if (state_fd == -1) {
+ exit(1);
+ }
+ }
delete servers;
+
+ for (unsigned i = 0; i < mark_pools.size(); ++i) {
+ delete mark_pools[i];
+ }
+ mark_pools.clear();
+
+ access_log->stop();
+ delete access_log;
+ shut_down_logging();
+
+ if (stopped) {
+ exit(0);
+ }
+
+ // OK, so the signal was SIGHUP. Check that the new config is okay, then exec the new binary.
+ if (!dry_run_config(argv0_canon, config_filename_canon)) {
+ open_logs(config.log_destinations);
+ log(ERROR, "%s --test-config failed. Restarting old version instead of new.", argv[0]);
+ hupped = false;
+ shut_down_logging();
+ goto start;
+ }
char buf[16];
sprintf(buf, "%d", state_fd);
for ( ;; ) {
- execlp(argv[0], argv[0], config_filename.c_str(), "--state", buf, NULL);
- perror("execlp");
- fprintf(stderr, "PANIC: re-exec of %s failed. Waiting 0.2 seconds and trying again...\n", argv[0]);
+ execlp(argv0_canon, argv0_canon, config_filename_canon, "--state", buf, NULL);
+ open_logs(config.log_destinations);
+ log_perror("execlp");
+ log(ERROR, "re-exec of %s failed. Waiting 0.2 seconds and trying again...", argv0_canon);
+ shut_down_logging();
usleep(200000);
}
}
projects / cubemap / blobdiff