void uwsgi_mule_handler() {
ssize_t len;
uint8_t uwsgi_signal;
int rlen;
int interesting_fd;
// this must be configurable
char message[65536];
int mule_queue = event_queue_init();
event_queue_add_fd_read(mule_queue, uwsgi.signal_socket);
event_queue_add_fd_read(mule_queue, uwsgi.my_signal_socket);
event_queue_add_fd_read(mule_queue, uwsgi.mules[uwsgi.muleid - 1].queue_pipe[1]);
event_queue_add_fd_read(mule_queue, uwsgi.shared->mule_queue_pipe[1]);
uwsgi_mule_add_farm_to_queue(mule_queue);
for (;;) {
rlen = event_queue_wait(mule_queue, -1, &interesting_fd);
if (rlen <= 0) {
continue;
}
if (interesting_fd == uwsgi.signal_socket || interesting_fd == uwsgi.my_signal_socket || farm_has_signaled(interesting_fd)) {
len = read(interesting_fd, &uwsgi_signal, 1);
if (len <= 0) {
uwsgi_log_verbose("uWSGI mule %d braying: my master died, i will follow him...\n", uwsgi.muleid);
end_me(0);
}
#ifdef UWSGI_DEBUG
uwsgi_log_verbose("master sent signal %d to mule %d\n", uwsgi_signal, uwsgi.muleid);
#endif
if (uwsgi_signal_handler(uwsgi_signal)) {
uwsgi_log_verbose("error managing signal %d on mule %d\n", uwsgi_signal, uwsgi.muleid);
}
}
else if (interesting_fd == uwsgi.mules[uwsgi.muleid - 1].queue_pipe[1] || interesting_fd == uwsgi.shared->mule_queue_pipe[1] || farm_has_msg(interesting_fd)) {
len = read(interesting_fd, message, 65536);
if (len < 0) {
uwsgi_error("read()");
}
else {
int i, found = 0;
for (i = 0; i < 256; i++) {
if (uwsgi.p[i]->mule_msg) {
if (uwsgi.p[i]->mule_msg(message, len)) {
found = 1;
break;
}
}
}
if (!found)
uwsgi_log("*** mule %d received a %ld bytes message ***\n", uwsgi.muleid, (long) len);
}
}
}
}
static void uwsgi_alarm_thread_loop(struct uwsgi_thread *ut) {
// add uwsgi_alarm_fd;
struct uwsgi_alarm_fd *uafd = uwsgi.alarm_fds;
while(uafd) {
event_queue_add_fd_read(ut->queue, uafd->fd);
uafd = uafd->next;
}
char *buf = uwsgi_malloc(uwsgi.alarm_msg_size + sizeof(long));
for (;;) {
int interesting_fd = -1;
int ret = event_queue_wait(ut->queue, -1, &interesting_fd);
if (ret > 0) {
if (interesting_fd == ut->pipe[1]) {
ssize_t len = read(ut->pipe[1], buf, uwsgi.alarm_msg_size + sizeof(long));
if (len > (ssize_t)(sizeof(long) + 1)) {
size_t msg_size = len - sizeof(long);
char *msg = buf + sizeof(long);
long ptr = 0;
memcpy(&ptr, buf, sizeof(long));
struct uwsgi_alarm_instance *uai = (struct uwsgi_alarm_instance *) ptr;
if (!uai)
break;
uwsgi_alarm_run(uai, msg, msg_size);
}
}
// check for alarm_fd
else {
uafd = uwsgi.alarm_fds;
int fd_read = 0;
while(uafd) {
if (interesting_fd == uafd->fd) {
if (fd_read) goto raise;
size_t remains = uafd->buf_len;
while(remains) {
ssize_t len = read(uafd->fd, uafd->buf + (uafd->buf_len-remains), remains);
if (len <= 0) {
uwsgi_error("[uwsgi-alarm-fd]/read()");
uwsgi_log("[uwsgi-alarm-fd] i will stop monitoring fd %d\n", uafd->fd);
event_queue_del_fd(ut->queue, uafd->fd, event_queue_read());
break;
}
remains-=len;
}
fd_read = 1;
raise:
uwsgi_alarm_run(uafd->alarm, uafd->msg, uafd->msg_len);
}
uafd = uafd->next;
}
}
}
}
free(buf);
}
static void uwsgi_alarm_curl_loop(struct uwsgi_thread *ut) {
int interesting_fd;
ut->buf = uwsgi_malloc(uwsgi.log_master_bufsize);
CURL *curl = curl_easy_init();
// ARGH !!!
if (!curl) return;
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, uwsgi.shared->options[UWSGI_OPTION_SOCKET_TIMEOUT]);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, uwsgi.shared->options[UWSGI_OPTION_SOCKET_TIMEOUT]);
curl_easy_setopt(curl, CURLOPT_READFUNCTION, uwsgi_alarm_curl_read_callback);
curl_easy_setopt(curl, CURLOPT_READDATA, ut);
curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
curl_easy_setopt(curl, CURLOPT_POST, 1L);
struct curl_slist *expect = NULL; expect = curl_slist_append(expect, "Expect:");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, expect);
struct uwsgi_alarm_curl_config *uacc = (struct uwsgi_alarm_curl_config *) ut->data;
char *opts = uwsgi_str(uacc->arg);
// fill curl options
char *ctx = NULL;
char *p = strtok_r(opts, ";", &ctx);
while(p) {
uwsgi_alarm_curl_setopt(curl, uwsgi_str(p), uacc);
p = strtok_r(NULL, ";", &ctx);
}
for(;;) {
int ret = event_queue_wait(ut->queue, -1, &interesting_fd);
if (ret < 0) return;
if (ret == 0) continue;
if (interesting_fd != ut->pipe[1]) continue;
ssize_t rlen = read(ut->pipe[1], ut->buf, uwsgi.log_master_bufsize);
if (rlen <= 0) continue;
ut->pos = 0;
ut->len = (size_t) rlen;
ut->custom0 = 0;
curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t) ut->len);
CURLcode res = curl_easy_perform(curl);
if (res != CURLE_OK) {
uwsgi_log_alarm("-curl] curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
}
}
/* 工作者线程 */
static void * event_worker(void * arg)
{
event_queue_t * peq = arg;
struct cmd_event * pe;
struct cmd_event * events[EVENTS_SIZ];
int cnt;
peq->sql_db = malloc(sizeof(*(peq->sql_db))); //在当前线程中打开数据库连接
if (peq->sql_db == NULL) {
log_error(LOG_ERROR, "NO MEM");
exit(1);
}
if (sqlite_db_open(peq->sql_db, SQL_DB) < 0) { //在当前线程中打开数据库连接
log_error(LOG_ERROR, "event_queue_init"); //！！！出错
}
//sleep(1);
do {
// printf("\nevent_worker\n");
cnt = 0;
while ((pe = event_queue_pop(peq)) != NULL) {
pe->cb(peq->sql_db, pe->psock, pe->buffer, pe->buf_siz);
events[cnt++] = pe;
cnt -= del_events(cnt, events, peq);
}
del_all_events(cnt, events, peq);
event_queue_wait(peq);
//sleep(1);
} while (1);
sqlite_db_close(peq->sql_db);
free(peq->sql_db);
event_queue_destroy(peq);
return NULL;
}
int spool_request(struct uwsgi_spooler *uspool, char *filename, int rn, int core_id, char *buffer, int size, char *priority, time_t at, char *body, size_t body_len) {
struct timeval tv;
int fd;
struct uwsgi_header uh;
if (!uspool) {
uspool = uwsgi.spoolers;
}
// this lock is for threads, the pid value in filename will avoid multiprocess races
uwsgi_lock(uspool->lock);
gettimeofday(&tv, NULL);
if (priority) {
if (snprintf(filename, 1024, "%s/%s", uspool->dir, priority) <= 0) {
uwsgi_unlock(uspool->lock);
return 0;
}
// no need to check for errors...
(void) mkdir(filename, 0777);
if (snprintf(filename, 1024, "%s/%s/uwsgi_spoolfile_on_%s_%d_%d_%d_%llu_%llu", uspool->dir, priority, uwsgi.hostname, (int) getpid(), rn, core_id, (unsigned long long) tv.tv_sec, (unsigned long long) tv.tv_usec) <= 0) {
uwsgi_unlock(uspool->lock);
return 0;
}
}
else {
if (snprintf(filename, 1024, "%s/uwsgi_spoolfile_on_%s_%d_%d_%d_%llu_%llu", uspool->dir, uwsgi.hostname, (int) getpid(), rn, core_id, (unsigned long long) tv.tv_sec, (unsigned long long) tv.tv_usec) <= 0) {
uwsgi_unlock(uspool->lock);
return 0;
}
}
fd = open(filename, O_CREAT | O_EXCL | O_WRONLY, S_IRUSR | S_IWUSR);
if (fd < 0) {
uwsgi_error_open(filename);
uwsgi_unlock(uspool->lock);
return 0;
}
// now lock the file, it will no be runnable, until the lock is not removed
// a race could come if the spooler take the file before fcntl is called
// in such case the spooler will detect a zeroed file and will retry later
if (uwsgi_fcntl_lock(fd)) {
close(fd);
uwsgi_unlock(uspool->lock);
return 0;
}
uh.modifier1 = 17;
uh.modifier2 = 0;
uh.pktsize = (uint16_t) size;
#ifdef __BIG_ENDIAN__
uh.pktsize = uwsgi_swap16(uh.pktsize);
#endif
if (write(fd, &uh, 4) != 4) {
goto clear;
}
if (write(fd, buffer, size) != size) {
goto clear;
}
if (body && body_len > 0) {
if ((size_t)write(fd, body, body_len) != body_len) {
goto clear;
}
}
if (at > 0) {
struct timeval tv[2];
tv[0].tv_sec = at;
tv[0].tv_usec = 0;
tv[1].tv_sec = at;
tv[1].tv_usec = 0;
#ifdef __sun__
if (futimesat(fd, NULL, tv)) {
#else
if (futimes(fd, tv)) {
#endif
uwsgi_error("futimes()");
}
}
// here the file will be unlocked too
close(fd);
if (!uwsgi.spooler_quiet)
uwsgi_log("[spooler] written %d bytes to file %s\n", size + body_len + 4, filename);
// and here waiting threads can continue
uwsgi_unlock(uspool->lock);
/* wake up the spoolers attached to the specified dir ... (HACKY)
no need to fear races, as USR1 is harmless an all of the uWSGI processes...
it could be a problem if a new process takes the old pid, but modern systems should avoid that
*/
struct uwsgi_spooler *spoolers = uwsgi.spoolers;
while(spoolers) {
if (!strcmp(spoolers->dir, uspool->dir)) {
if (spoolers->pid > 0 && spoolers->running == 0) {
(void) kill(spoolers->pid, SIGUSR1);
}
}
spoolers = spoolers->next;
}
return 1;
clear:
uwsgi_unlock(uspool->lock);
uwsgi_error("write()");
if (unlink(filename)) {
uwsgi_error("unlink()");
}
// unlock the file too
close(fd);
return 0;
}
void spooler(struct uwsgi_spooler *uspool) {
// prevent process blindly reading stdin to make mess
int nullfd;
// asked by Marco Beri
#ifdef __HAIKU__
#ifdef UWSGI_DEBUG
uwsgi_log("lowering spooler priority to %d\n", B_LOW_PRIORITY);
#endif
set_thread_priority(find_thread(NULL), B_LOW_PRIORITY);
#else
#ifdef UWSGI_DEBUG
uwsgi_log("lowering spooler priority to %d\n", PRIO_MAX);
#endif
setpriority(PRIO_PROCESS, getpid(), PRIO_MAX);
#endif
nullfd = open("/dev/null", O_RDONLY);
if (nullfd < 0) {
uwsgi_error_open("/dev/null");
exit(1);
}
if (nullfd != 0) {
dup2(nullfd, 0);
close(nullfd);
}
int spooler_event_queue = event_queue_init();
int interesting_fd = -1;
if (uwsgi.master_process) {
event_queue_add_fd_read(spooler_event_queue, uwsgi.shared->spooler_signal_pipe[1]);
}
// reset the tasks counter
uspool->tasks = 0;
for (;;) {
if (chdir(uspool->dir)) {
uwsgi_error("chdir()");
exit(1);
}
if (uwsgi.spooler_ordered) {
#ifdef __linux__
spooler_scandir(uspool, NULL);
#else
spooler_readdir(uspool, NULL);
#endif
}
else {
spooler_readdir(uspool, NULL);
}
int timeout = uwsgi.shared->spooler_frequency;
if (wakeup > 0) {
timeout = 0;
}
if (event_queue_wait(spooler_event_queue, timeout, &interesting_fd) > 0) {
if (uwsgi.master_process) {
if (interesting_fd == uwsgi.shared->spooler_signal_pipe[1]) {
uwsgi_receive_signal(interesting_fd, "spooler", (int) getpid());
}
}
}
// avoid races
uint64_t tmp_wakeup = wakeup;
if (tmp_wakeup > 0) {
tmp_wakeup--;
}
wakeup = tmp_wakeup;
// need to recycle ?
if (uwsgi.spooler_max_tasks > 0 && uspool->tasks >= (uint64_t)uwsgi.spooler_max_tasks) {
uwsgi_log("[spooler %s pid: %d] maximum number of tasks reached (%d) recycling ...\n", uspool->dir, (int) uwsgi.mypid, uwsgi.spooler_max_tasks);
end_me(0);
}
}
}
int master_loop(char **argv, char **environ) {
uint64_t tmp_counter;
struct timeval last_respawn;
int last_respawn_rate = 0;
int pid_found = 0;
pid_t diedpid;
int waitpid_status;
uint8_t uwsgi_signal;
time_t last_request_timecheck = 0, now = 0;
uint64_t last_request_count = 0;
pthread_t logger_thread;
pthread_t cache_sweeper;
#ifdef UWSGI_UDP
int udp_fd = -1;
#ifdef UWSGI_MULTICAST
char *cluster_opt_buf = NULL;
size_t cluster_opt_size = 4;
#endif
#endif
#ifdef UWSGI_SNMP
int snmp_fd = -1;
#endif
int i = 0;
int rlen;
int check_interval = 1;
struct uwsgi_rb_timer *min_timeout;
struct rb_root *rb_timers = uwsgi_init_rb_timer();
if (uwsgi.procname_master) {
uwsgi_set_processname(uwsgi.procname_master);
}
else if (uwsgi.procname) {
uwsgi_set_processname(uwsgi.procname);
}
else if (uwsgi.auto_procname) {
uwsgi_set_processname("uWSGI master");
}
uwsgi.current_time = uwsgi_now();
uwsgi_unix_signal(SIGTSTP, suspend_resume_them_all);
uwsgi_unix_signal(SIGHUP, grace_them_all);
if (uwsgi.die_on_term) {
uwsgi_unix_signal(SIGTERM, kill_them_all);
uwsgi_unix_signal(SIGQUIT, reap_them_all);
}
else {
uwsgi_unix_signal(SIGTERM, reap_them_all);
uwsgi_unix_signal(SIGQUIT, kill_them_all);
}
uwsgi_unix_signal(SIGINT, kill_them_all);
uwsgi_unix_signal(SIGUSR1, stats);
if (uwsgi.auto_snapshot) {
uwsgi_unix_signal(SIGURG, uwsgi_restore_auto_snapshot);
}
atexit(uwsgi_master_cleanup_hooks);
uwsgi.master_queue = event_queue_init();
/* route signals to workers... */
#ifdef UWSGI_DEBUG
uwsgi_log("adding %d to signal poll\n", uwsgi.shared->worker_signal_pipe[0]);
#endif
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->worker_signal_pipe[0]);
#ifdef UWSGI_SPOOLER
if (uwsgi.spoolers) {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->spooler_signal_pipe[0]);
}
#endif
if (uwsgi.mules_cnt > 0) {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->mule_signal_pipe[0]);
}
if (uwsgi.log_master) {
uwsgi.log_master_buf = uwsgi_malloc(uwsgi.log_master_bufsize);
if (!uwsgi.threaded_logger) {
#ifdef UWSGI_DEBUG
uwsgi_log("adding %d to master logging\n", uwsgi.shared->worker_log_pipe[0]);
#endif
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->worker_log_pipe[0]);
}
else {
if (pthread_create(&logger_thread, NULL, logger_thread_loop, NULL)) {
uwsgi_error("pthread_create()");
uwsgi_log("falling back to non-threaded logger...\n");
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->worker_log_pipe[0]);
uwsgi.threaded_logger = 0;
}
}
#ifdef UWSGI_ALARM
// initialize the alarm subsystem
uwsgi_alarms_init();
#endif
}
if (uwsgi.cache_max_items > 0 && !uwsgi.cache_no_expire) {
if (pthread_create(&cache_sweeper, NULL, cache_sweeper_loop, NULL)) {
uwsgi_error("pthread_create()");
uwsgi_log("unable to run the cache sweeper !!!\n");
}
else {
uwsgi_log("cache sweeper thread enabled\n");
}
}
uwsgi.wsgi_req->buffer = uwsgi.workers[0].cores[0].buffer;
if (uwsgi.has_emperor) {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.emperor_fd);
}
if (uwsgi.zerg_server) {
uwsgi.zerg_server_fd = bind_to_unix(uwsgi.zerg_server, uwsgi.listen_queue, 0, 0);
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.zerg_server_fd);
uwsgi_log("*** Zerg server enabled on %s ***\n", uwsgi.zerg_server);
}
if (uwsgi.stats) {
char *tcp_port = strchr(uwsgi.stats, ':');
if (tcp_port) {
// disable deferred accept for this socket
int current_defer_accept = uwsgi.no_defer_accept;
uwsgi.no_defer_accept = 1;
uwsgi.stats_fd = bind_to_tcp(uwsgi.stats, uwsgi.listen_queue, tcp_port);
uwsgi.no_defer_accept = current_defer_accept;
}
else {
uwsgi.stats_fd = bind_to_unix(uwsgi.stats, uwsgi.listen_queue, uwsgi.chmod_socket, uwsgi.abstract_socket);
}
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.stats_fd);
uwsgi_log("*** Stats server enabled on %s fd: %d ***\n", uwsgi.stats, uwsgi.stats_fd);
}
#ifdef UWSGI_UDP
if (uwsgi.udp_socket) {
udp_fd = bind_to_udp(uwsgi.udp_socket, 0, 0);
if (udp_fd < 0) {
uwsgi_log("unable to bind to udp socket. SNMP and cluster management services will be disabled.\n");
}
else {
uwsgi_log("UDP server enabled.\n");
event_queue_add_fd_read(uwsgi.master_queue, udp_fd);
}
}
#ifdef UWSGI_MULTICAST
if (uwsgi.cluster) {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.cluster_fd);
cluster_opt_buf = uwsgi_setup_clusterbuf(&cluster_opt_size);
}
#endif
#endif
#ifdef UWSGI_SNMP
snmp_fd = uwsgi_setup_snmp();
#endif
if (uwsgi.cheap) {
uwsgi_add_sockets_to_queue(uwsgi.master_queue, -1);
for (i = 1; i <= uwsgi.numproc; i++) {
uwsgi.workers[i].cheaped = 1;
}
uwsgi_log("cheap mode enabled: waiting for socket connection...\n");
}
// spawn mules
for (i = 0; i < uwsgi.mules_cnt; i++) {
size_t mule_patch_size = 0;
uwsgi.mules[i].patch = uwsgi_string_get_list(&uwsgi.mules_patches, i, &mule_patch_size);
uwsgi_mule(i + 1);
}
// spawn gateways
for (i = 0; i < ushared->gateways_cnt; i++) {
if (ushared->gateways[i].pid == 0) {
gateway_respawn(i);
}
}
// spawn daemons
uwsgi_daemons_spawn_all();
// first subscription
struct uwsgi_string_list *subscriptions = uwsgi.subscriptions;
while (subscriptions) {
uwsgi_subscribe(subscriptions->value, 0);
subscriptions = subscriptions->next;
}
// sync the cache store if needed
if (uwsgi.cache_store && uwsgi.cache_filesize) {
if (msync(uwsgi.cache_items, uwsgi.cache_filesize, MS_ASYNC)) {
uwsgi_error("msync()");
}
}
if (uwsgi.queue_store && uwsgi.queue_filesize) {
if (msync(uwsgi.queue_header, uwsgi.queue_filesize, MS_ASYNC)) {
uwsgi_error("msync()");
}
}
// update touches timestamps
uwsgi_check_touches(uwsgi.touch_reload);
uwsgi_check_touches(uwsgi.touch_logrotate);
uwsgi_check_touches(uwsgi.touch_logreopen);
// setup cheaper algos
uwsgi.cheaper_algo = uwsgi_cheaper_algo_spare;
if (uwsgi.requested_cheaper_algo) {
uwsgi.cheaper_algo = NULL;
struct uwsgi_cheaper_algo *uca = uwsgi.cheaper_algos;
while (uca) {
if (!strcmp(uca->name, uwsgi.requested_cheaper_algo)) {
uwsgi.cheaper_algo = uca->func;
break;
}
uca = uca->next;
}
if (!uwsgi.cheaper_algo) {
uwsgi_log("unable to find requested cheaper algorithm, falling back to spare\n");
uwsgi.cheaper_algo = uwsgi_cheaper_algo_spare;
}
}
// here really starts the master loop
for (;;) {
//uwsgi_log("uwsgi.ready_to_reload %d %d\n", uwsgi.ready_to_reload, uwsgi.numproc);
// run master_cycle hook for every plugin
for (i = 0; i < uwsgi.gp_cnt; i++) {
if (uwsgi.gp[i]->master_cycle) {
uwsgi.gp[i]->master_cycle();
}
}
for (i = 0; i < 256; i++) {
if (uwsgi.p[i]->master_cycle) {
uwsgi.p[i]->master_cycle();
}
}
uwsgi_daemons_smart_check();
// count the number of active workers
int active_workers = 0;
for (i = 1; i <= uwsgi.numproc; i++) {
if (uwsgi.workers[i].cheaped == 0 && uwsgi.workers[i].pid > 0) {
active_workers++;
}
}
if (uwsgi.to_outworld) {
//uwsgi_log("%d/%d\n", uwsgi.lazy_respawned, uwsgi.numproc);
if (uwsgi.lazy_respawned >= active_workers) {
uwsgi.to_outworld = 0;
uwsgi.master_mercy = 0;
uwsgi.lazy_respawned = 0;
}
}
if (uwsgi_master_check_mercy())
return 0;
if (uwsgi.respawn_workers) {
for (i = 1; i <= uwsgi.respawn_workers; i++) {
if (uwsgi_respawn_worker(i))
return 0;
}
uwsgi.respawn_workers = 0;
}
if (uwsgi.restore_snapshot) {
uwsgi_master_restore_snapshot();
continue;
}
// cheaper management
if (uwsgi.cheaper && !uwsgi.cheap && !uwsgi.to_heaven && !uwsgi.to_hell && !uwsgi.to_outworld && !uwsgi.workers[0].suspended) {
if (!uwsgi_calc_cheaper())
return 0;
}
if ((uwsgi.cheap || uwsgi.ready_to_die >= active_workers) && uwsgi.to_hell) {
// call a series of waitpid to ensure all processes (gateways, mules and daemons) are dead
for (i = 0; i < (ushared->gateways_cnt + uwsgi.daemons_cnt + uwsgi.mules_cnt); i++) {
diedpid = waitpid(WAIT_ANY, &waitpid_status, WNOHANG);
}
uwsgi_log("goodbye to uWSGI.\n");
exit(0);
}
if ((uwsgi.cheap || uwsgi.ready_to_reload >= active_workers) && uwsgi.to_heaven) {
uwsgi_reload(argv);
// never here (unless in shared library mode)
return -1;
}
diedpid = waitpid(WAIT_ANY, &waitpid_status, WNOHANG);
if (diedpid == -1) {
if (errno == ECHILD) {
// something did not work as expected, just assume all has been cleared
if (uwsgi.to_heaven) {
uwsgi.ready_to_reload = uwsgi.numproc;
continue;
}
else if (uwsgi.to_hell) {
uwsgi.ready_to_die = uwsgi.numproc;
continue;
}
else if (uwsgi.to_outworld) {
uwsgi.lazy_respawned = uwsgi.numproc;
uwsgi_log("*** no workers to reload found ***\n");
continue;
}
diedpid = 0;
}
else {
uwsgi_error("waitpid()");
/* here is better to reload all the uWSGI stack */
uwsgi_log("something horrible happened...\n");
reap_them_all(0);
exit(1);
}
}
if (diedpid == 0) {
/* all processes ok, doing status scan after N seconds */
check_interval = uwsgi.shared->options[UWSGI_OPTION_MASTER_INTERVAL];
if (!check_interval)
check_interval = 1;
// add unregistered file monitors
// locking is not needed as monitors can only increase
for (i = 0; i < ushared->files_monitored_cnt; i++) {
if (!ushared->files_monitored[i].registered) {
ushared->files_monitored[i].fd = event_queue_add_file_monitor(uwsgi.master_queue, ushared->files_monitored[i].filename, &ushared->files_monitored[i].id);
ushared->files_monitored[i].registered = 1;
}
}
// add unregistered timers
// locking is not needed as timers can only increase
for (i = 0; i < ushared->timers_cnt; i++) {
if (!ushared->timers[i].registered) {
ushared->timers[i].fd = event_queue_add_timer(uwsgi.master_queue, &ushared->timers[i].id, ushared->timers[i].value);
ushared->timers[i].registered = 1;
}
}
// add unregistered rb_timers
// locking is not needed as rb_timers can only increase
for (i = 0; i < ushared->rb_timers_cnt; i++) {
if (!ushared->rb_timers[i].registered) {
ushared->rb_timers[i].uwsgi_rb_timer = uwsgi_add_rb_timer(rb_timers, uwsgi_now() + ushared->rb_timers[i].value, &ushared->rb_timers[i]);
ushared->rb_timers[i].registered = 1;
}
}
int interesting_fd = -1;
if (ushared->rb_timers_cnt > 0) {
min_timeout = uwsgi_min_rb_timer(rb_timers);
if (min_timeout == NULL) {
check_interval = uwsgi.shared->options[UWSGI_OPTION_MASTER_INTERVAL];
}
else {
check_interval = min_timeout->key - uwsgi_now();
if (check_interval <= 0) {
expire_rb_timeouts(rb_timers);
check_interval = 0;
}
}
}
// wait for event
rlen = event_queue_wait(uwsgi.master_queue, check_interval, &interesting_fd);
if (rlen == 0) {
if (ushared->rb_timers_cnt > 0) {
expire_rb_timeouts(rb_timers);
}
}
// check uwsgi-cron table
if (ushared->cron_cnt) {
uwsgi_manage_signal_cron(uwsgi_now());
}
if (uwsgi.crons) {
uwsgi_manage_command_cron(uwsgi_now());
}
// check for probes
if (ushared->probes_cnt > 0) {
uwsgi_lock(uwsgi.probe_table_lock);
for (i = 0; i < ushared->probes_cnt; i++) {
if (interesting_fd == -1) {
// increment cycles
ushared->probes[i].cycles++;
}
if (ushared->probes[i].func(interesting_fd, &ushared->probes[i])) {
uwsgi_route_signal(ushared->probes[i].sig);
}
}
uwsgi_unlock(uwsgi.probe_table_lock);
}
if (rlen > 0) {
if (uwsgi.log_master && !uwsgi.threaded_logger) {
if (interesting_fd == uwsgi.shared->worker_log_pipe[0]) {
uwsgi_master_log();
goto health_cycle;
}
}
if (uwsgi.stats && uwsgi.stats_fd > -1) {
if (interesting_fd == uwsgi.stats_fd) {
uwsgi_send_stats(uwsgi.stats_fd);
goto health_cycle;
}
}
if (uwsgi.zerg_server) {
if (interesting_fd == uwsgi.zerg_server_fd) {
uwsgi_manage_zerg(uwsgi.zerg_server_fd, 0, NULL);
goto health_cycle;
}
}
if (uwsgi.has_emperor) {
if (interesting_fd == uwsgi.emperor_fd) {
uwsgi_master_manage_emperor();
goto health_cycle;
}
}
if (uwsgi.cheap) {
int found = 0;
struct uwsgi_socket *uwsgi_sock = uwsgi.sockets;
while (uwsgi_sock) {
if (interesting_fd == uwsgi_sock->fd) {
found = 1;
uwsgi.cheap = 0;
uwsgi_del_sockets_from_queue(uwsgi.master_queue);
int needed = uwsgi.numproc;
if (uwsgi.cheaper) {
needed = uwsgi.cheaper_count;
}
for (i = 1; i <= needed; i++) {
if (uwsgi_respawn_worker(i))
return 0;
}
break;
}
uwsgi_sock = uwsgi_sock->next;
}
// here is better to continue instead going to health_cycle
if (found)
continue;
}
#ifdef UWSGI_SNMP
if (uwsgi.snmp_addr && interesting_fd == snmp_fd) {
uwsgi_master_manage_snmp(snmp_fd);
goto health_cycle;
}
#endif
#ifdef UWSGI_UDP
if (uwsgi.udp_socket && interesting_fd == udp_fd) {
uwsgi_master_manage_udp(udp_fd);
goto health_cycle;
}
#ifdef UWSGI_MULTICAST
if (interesting_fd == uwsgi.cluster_fd) {
if (uwsgi_get_dgram(uwsgi.cluster_fd, &uwsgi.workers[0].cores[0].req)) {
goto health_cycle;
}
manage_cluster_message(cluster_opt_buf, cluster_opt_size);
goto health_cycle;
}
#endif
#endif
int next_iteration = 0;
uwsgi_lock(uwsgi.fmon_table_lock);
for (i = 0; i < ushared->files_monitored_cnt; i++) {
if (ushared->files_monitored[i].registered) {
if (interesting_fd == ushared->files_monitored[i].fd) {
struct uwsgi_fmon *uf = event_queue_ack_file_monitor(uwsgi.master_queue, interesting_fd);
// now call the file_monitor handler
if (uf)
uwsgi_route_signal(uf->sig);
break;
}
}
}
uwsgi_unlock(uwsgi.fmon_table_lock);
if (next_iteration)
goto health_cycle;;
next_iteration = 0;
uwsgi_lock(uwsgi.timer_table_lock);
for (i = 0; i < ushared->timers_cnt; i++) {
if (ushared->timers[i].registered) {
if (interesting_fd == ushared->timers[i].fd) {
struct uwsgi_timer *ut = event_queue_ack_timer(interesting_fd);
// now call the file_monitor handler
if (ut)
uwsgi_route_signal(ut->sig);
break;
}
}
}
uwsgi_unlock(uwsgi.timer_table_lock);
if (next_iteration)
goto health_cycle;;
// check for worker signal
if (interesting_fd == uwsgi.shared->worker_signal_pipe[0]) {
rlen = read(interesting_fd, &uwsgi_signal, 1);
if (rlen < 0) {
uwsgi_error("read()");
}
else if (rlen > 0) {
#ifdef UWSGI_DEBUG
uwsgi_log_verbose("received uwsgi signal %d from a worker\n", uwsgi_signal);
#endif
uwsgi_route_signal(uwsgi_signal);
}
else {
uwsgi_log_verbose("lost connection with worker %d\n", i);
close(interesting_fd);
}
goto health_cycle;
}
#ifdef UWSGI_SPOOLER
// check for spooler signal
if (uwsgi.spoolers) {
if (interesting_fd == uwsgi.shared->spooler_signal_pipe[0]) {
rlen = read(interesting_fd, &uwsgi_signal, 1);
if (rlen < 0) {
uwsgi_error("read()");
}
else if (rlen > 0) {
#ifdef UWSGI_DEBUG
uwsgi_log_verbose("received uwsgi signal %d from a spooler\n", uwsgi_signal);
#endif
uwsgi_route_signal(uwsgi_signal);
}
else {
uwsgi_log_verbose("lost connection with the spooler\n");
close(interesting_fd);
}
goto health_cycle;
}
}
#endif
// check for mules signal
if (uwsgi.mules_cnt > 0) {
if (interesting_fd == uwsgi.shared->mule_signal_pipe[0]) {
rlen = read(interesting_fd, &uwsgi_signal, 1);
if (rlen < 0) {
uwsgi_error("read()");
}
else if (rlen > 0) {
#ifdef UWSGI_DEBUG
uwsgi_log_verbose("received uwsgi signal %d from a mule\n", uwsgi_signal);
#endif
uwsgi_route_signal(uwsgi_signal);
}
else {
uwsgi_log_verbose("lost connection with a mule\n");
close(interesting_fd);
}
goto health_cycle;
}
}
}
health_cycle:
now = uwsgi_now();
if (now - uwsgi.current_time < 1) {
continue;
}
uwsgi.current_time = now;
// checking logsize
if (uwsgi.logfile) {
uwsgi_check_logrotate();
}
// this will be incremented at (more or less) regular intervals
uwsgi.master_cycles++;
// recalculate requests counter on race conditions risky configurations
// a bit of inaccuracy is better than locking;)
if (uwsgi.numproc > 1) {
tmp_counter = 0;
for (i = 1; i < uwsgi.numproc + 1; i++)
tmp_counter += uwsgi.workers[i].requests;
uwsgi.workers[0].requests = tmp_counter;
}
if (uwsgi.idle > 0 && !uwsgi.cheap) {
uwsgi.current_time = uwsgi_now();
if (!last_request_timecheck)
last_request_timecheck = uwsgi.current_time;
int busy_workers = 0;
for (i = 1; i <= uwsgi.numproc; i++) {
if (uwsgi.workers[i].cheaped == 0 && uwsgi.workers[i].pid > 0) {
if (uwsgi.workers[i].busy == 1) {
busy_workers = 1;
break;
}
}
}
if (last_request_count != uwsgi.workers[0].requests) {
last_request_timecheck = uwsgi.current_time;
last_request_count = uwsgi.workers[0].requests;
}
// a bit of over-engeneering to avoid clock skews
else if (last_request_timecheck < uwsgi.current_time && (uwsgi.current_time - last_request_timecheck > uwsgi.idle) && !busy_workers) {
uwsgi_log("workers have been inactive for more than %d seconds (%llu-%llu)\n", uwsgi.idle, (unsigned long long) uwsgi.current_time, (unsigned long long) last_request_timecheck);
uwsgi.cheap = 1;
if (uwsgi.die_on_idle) {
if (uwsgi.has_emperor) {
char byte = 22;
if (write(uwsgi.emperor_fd, &byte, 1) != 1) {
uwsgi_error("write()");
kill_them_all(0);
}
}
else {
kill_them_all(0);
}
continue;
}
for (i = 1; i <= uwsgi.numproc; i++) {
uwsgi.workers[i].cheaped = 1;
if (uwsgi.workers[i].pid == 0)
continue;
kill(uwsgi.workers[i].pid, SIGKILL);
if (waitpid(uwsgi.workers[i].pid, &waitpid_status, 0) < 0) {
if (errno != ECHILD)
uwsgi_error("waitpid()");
}
}
uwsgi_add_sockets_to_queue(uwsgi.master_queue, -1);
uwsgi_log("cheap mode enabled: waiting for socket connection...\n");
last_request_timecheck = 0;
continue;
}
}
check_interval = uwsgi.shared->options[UWSGI_OPTION_MASTER_INTERVAL];
if (!check_interval)
check_interval = 1;
#ifdef __linux__
// get listen_queue status
struct uwsgi_socket *uwsgi_sock = uwsgi.sockets;
while (uwsgi_sock) {
if (uwsgi_sock->family == AF_INET) {
get_linux_tcp_info(uwsgi_sock->fd);
}
#ifdef SIOBKLGQ
else if (uwsgi_sock->family == AF_UNIX) {
get_linux_unbit_SIOBKLGQ(uwsgi_sock->fd);
}
#endif
uwsgi_sock = uwsgi_sock->next;
}
#endif
for (i = 1; i <= uwsgi.numproc; i++) {
/* first check for harakiri */
if (uwsgi.workers[i].harakiri > 0) {
if (uwsgi.workers[i].harakiri < (time_t) uwsgi.current_time) {
trigger_harakiri(i);
}
}
/* then user-defined harakiri */
if (uwsgi.workers[i].user_harakiri > 0) {
if (uwsgi.workers[i].user_harakiri < (time_t) uwsgi.current_time) {
trigger_harakiri(i);
}
}
// then for evil memory checkers
if (uwsgi.evil_reload_on_as) {
if ((rlim_t) uwsgi.workers[i].vsz_size >= uwsgi.evil_reload_on_as) {
uwsgi_log("*** EVIL RELOAD ON WORKER %d ADDRESS SPACE: %lld (pid: %d) ***\n", i, (long long) uwsgi.workers[i].vsz_size, uwsgi.workers[i].pid);
kill(uwsgi.workers[i].pid, SIGKILL);
uwsgi.workers[i].vsz_size = 0;
}
}
if (uwsgi.evil_reload_on_rss) {
if ((rlim_t) uwsgi.workers[i].rss_size >= uwsgi.evil_reload_on_rss) {
uwsgi_log("*** EVIL RELOAD ON WORKER %d RSS: %lld (pid: %d) ***\n", i, (long long) uwsgi.workers[i].rss_size, uwsgi.workers[i].pid);
kill(uwsgi.workers[i].pid, SIGKILL);
uwsgi.workers[i].rss_size = 0;
}
}
// need to find a better way
//uwsgi.workers[i].last_running_time = uwsgi.workers[i].running_time;
}
for (i = 0; i < ushared->gateways_cnt; i++) {
if (ushared->gateways_harakiri[i] > 0) {
if (ushared->gateways_harakiri[i] < (time_t) uwsgi.current_time) {
if (ushared->gateways[i].pid > 0) {
kill(ushared->gateways[i].pid, SIGKILL);
}
ushared->gateways_harakiri[i] = 0;
}
}
}
for (i = 0; i < uwsgi.mules_cnt; i++) {
if (uwsgi.mules[i].harakiri > 0) {
if (uwsgi.mules[i].harakiri < (time_t) uwsgi.current_time) {
uwsgi_log("*** HARAKIRI ON MULE %d HANDLING SIGNAL %d (pid: %d) ***\n", i + 1, uwsgi.mules[i].signum, uwsgi.mules[i].pid);
kill(uwsgi.mules[i].pid, SIGKILL);
uwsgi.mules[i].harakiri = 0;
}
}
}
#ifdef UWSGI_SPOOLER
struct uwsgi_spooler *uspool = uwsgi.spoolers;
while (uspool) {
if (uspool->harakiri > 0 && uspool->harakiri < (time_t) uwsgi.current_time) {
uwsgi_log("*** HARAKIRI ON THE SPOOLER (pid: %d) ***\n", uspool->pid);
kill(uspool->pid, SIGKILL);
uspool->harakiri = 0;
}
uspool = uspool->next;
}
#endif
#ifdef __linux__
#ifdef MADV_MERGEABLE
if (uwsgi.linux_ksm > 0 && (uwsgi.master_cycles % uwsgi.linux_ksm) == 0) {
uwsgi_linux_ksm_map();
}
#endif
#endif
#ifdef UWSGI_UDP
// check for cluster nodes
master_check_cluster_nodes();
// reannounce myself every 10 cycles
if (uwsgi.cluster && uwsgi.cluster_fd >= 0 && !uwsgi.cluster_nodes && (uwsgi.master_cycles % 10) == 0) {
uwsgi_cluster_add_me();
}
// resubscribe every 10 cycles by default
if ((uwsgi.subscriptions && ((uwsgi.master_cycles % uwsgi.subscribe_freq) == 0 || uwsgi.master_cycles == 1)) && !uwsgi.to_heaven && !uwsgi.to_hell && !uwsgi.workers[0].suspended) {
struct uwsgi_string_list *subscriptions = uwsgi.subscriptions;
while (subscriptions) {
uwsgi_subscribe(subscriptions->value, 0);
subscriptions = subscriptions->next;
}
}
#endif
if (uwsgi.cache_store && uwsgi.cache_filesize && uwsgi.cache_store_sync && ((uwsgi.master_cycles % uwsgi.cache_store_sync) == 0)) {
if (msync(uwsgi.cache_items, uwsgi.cache_filesize, MS_ASYNC)) {
uwsgi_error("msync()");
}
}
if (uwsgi.queue_store && uwsgi.queue_filesize && uwsgi.queue_store_sync && ((uwsgi.master_cycles % uwsgi.queue_store_sync) == 0)) {
if (msync(uwsgi.queue_header, uwsgi.queue_filesize, MS_ASYNC)) {
uwsgi_error("msync()");
}
}
// check touch_reload
if (!uwsgi.to_heaven && !uwsgi.to_hell) {
char *touched = uwsgi_check_touches(uwsgi.touch_reload);
if (touched) {
uwsgi_log("*** %s has been touched... grace them all !!! ***\n", touched);
uwsgi_block_signal(SIGHUP);
grace_them_all(0);
uwsgi_unblock_signal(SIGHUP);
}
}
continue;
}
// no one died
if (diedpid <= 0)
continue;
// check for deadlocks first
uwsgi_deadlock_check(diedpid);
// reload gateways and daemons only on normal workflow (+outworld status)
if (!uwsgi.to_heaven && !uwsgi.to_hell) {
#ifdef UWSGI_SPOOLER
/* reload the spooler */
struct uwsgi_spooler *uspool = uwsgi.spoolers;
pid_found = 0;
while (uspool) {
if (uspool->pid > 0 && diedpid == uspool->pid) {
uwsgi_log("OOOPS the spooler is no more...trying respawn...\n");
uspool->respawned++;
uspool->pid = spooler_start(uspool);
pid_found = 1;
break;
}
uspool = uspool->next;
}
if (pid_found)
continue;
#endif
pid_found = 0;
for (i = 0; i < uwsgi.mules_cnt; i++) {
if (uwsgi.mules[i].pid == diedpid) {
uwsgi_log("OOOPS mule %d (pid: %d) crippled...trying respawn...\n", i + 1, uwsgi.mules[i].pid);
uwsgi_mule(i + 1);
pid_found = 1;
break;
}
}
if (pid_found)
continue;
/* reload the gateways */
pid_found = 0;
for (i = 0; i < ushared->gateways_cnt; i++) {
if (ushared->gateways[i].pid == diedpid) {
gateway_respawn(i);
pid_found = 1;
break;
}
}
if (pid_found)
continue;
/* reload the daemons */
pid_found = uwsgi_daemon_check_pid_reload(diedpid);
if (pid_found)
continue;
}
/* What happens here ?
case 1) the diedpid is not a worker, report it and continue
case 2) the diedpid is a worker and we are not in a reload procedure -> reload it
case 3) the diedpid is a worker and we are in graceful reload -> uwsgi.ready_to_reload++ and continue
case 3) the diedpid is a worker and we are in brutal reload -> uwsgi.ready_to_die++ and continue
*/
uwsgi.mywid = find_worker_id(diedpid);
if (uwsgi.mywid <= 0) {
// check spooler, mules, gateways and daemons
#ifdef UWSGI_SPOOLER
struct uwsgi_spooler *uspool = uwsgi.spoolers;
while (uspool) {
if (uspool->pid > 0 && diedpid == uspool->pid) {
uwsgi_log("spooler (pid: %d) annihilated\n", (int) diedpid);
goto next;
}
uspool = uspool->next;
}
#endif
for (i = 0; i < uwsgi.mules_cnt; i++) {
if (uwsgi.mules[i].pid == diedpid) {
uwsgi_log("mule %d (pid: %d) annihilated\n", i + 1, (int) diedpid);
goto next;
}
}
for (i = 0; i < ushared->gateways_cnt; i++) {
if (ushared->gateways[i].pid == diedpid) {
uwsgi_log("gateway %d (%s, pid: %d) annihilated\n", i + 1, ushared->gateways[i].fullname, (int) diedpid);
goto next;
}
}
if (uwsgi_daemon_check_pid_death(diedpid)) goto next;
if (WIFEXITED(waitpid_status)) {
uwsgi_log("subprocess %d exited with code %d\n", (int) diedpid, WEXITSTATUS(waitpid_status));
}
else if (WIFSIGNALED(waitpid_status)) {
uwsgi_log("subprocess %d exited by signal %d\n", (int) diedpid, WTERMSIG(waitpid_status));
}
else if (WIFSTOPPED(waitpid_status)) {
uwsgi_log("subprocess %d stopped\n", (int) diedpid);
}
next:
continue;
}
// ok a worker died...
if (uwsgi.to_heaven) {
uwsgi.ready_to_reload++;
uwsgi.workers[uwsgi.mywid].pid = 0;
// only to be safe :P
uwsgi.workers[uwsgi.mywid].harakiri = 0;
continue;
}
else if (uwsgi.to_hell) {
uwsgi.ready_to_die++;
uwsgi.workers[uwsgi.mywid].pid = 0;
// only to be safe :P
uwsgi.workers[uwsgi.mywid].harakiri = 0;
continue;
}
else if (uwsgi.to_outworld) {
uwsgi.lazy_respawned++;
uwsgi.workers[uwsgi.mywid].destroy = 0;
uwsgi.workers[uwsgi.mywid].pid = 0;
// only to be safe :P
uwsgi.workers[uwsgi.mywid].harakiri = 0;
}
if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_FAILED_APP_CODE) {
uwsgi_log("OOPS ! failed loading app in worker %d (pid %d) :( trying again...\n", uwsgi.mywid, (int) diedpid);
}
else if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_DE_HIJACKED_CODE) {
uwsgi_log("...restoring worker %d (pid: %d)...\n", uwsgi.mywid, (int) diedpid);
}
else if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_EXCEPTION_CODE) {
uwsgi_log("... monitored exception detected, respawning worker %d (pid: %d)...\n", uwsgi.mywid, (int) diedpid);
}
else if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_QUIET_CODE) {
// noop
}
else if (uwsgi.workers[uwsgi.mywid].manage_next_request) {
if (WIFSIGNALED(waitpid_status)) {
uwsgi_log("DAMN ! worker %d (pid: %d) died, killed by signal %d :( trying respawn ...\n", uwsgi.mywid, (int) diedpid, (int) WTERMSIG(waitpid_status));
}
else {
uwsgi_log("DAMN ! worker %d (pid: %d) died :( trying respawn ...\n", uwsgi.mywid, (int) diedpid);
}
}
else {
uwsgi_log("DAMN ! worker %d (pid: %d) MISTERIOUSLY died :( trying respawn ...\n", uwsgi.mywid, (int) diedpid);
}
if (uwsgi.workers[uwsgi.mywid].cheaped == 1) {
uwsgi.workers[uwsgi.mywid].pid = 0;
uwsgi_log("uWSGI worker %d cheaped.\n", uwsgi.mywid);
uwsgi.workers[uwsgi.mywid].harakiri = 0;
continue;
}
gettimeofday(&last_respawn, NULL);
if (last_respawn.tv_sec <= uwsgi.respawn_delta + check_interval) {
last_respawn_rate++;
if (last_respawn_rate > uwsgi.numproc) {
if (uwsgi.forkbomb_delay > 0) {
uwsgi_log("worker respawning too fast !!! i have to sleep a bit (%d seconds)...\n", uwsgi.forkbomb_delay);
/* use --forkbomb-delay 0 to disable sleeping */
sleep(uwsgi.forkbomb_delay);
}
last_respawn_rate = 0;
}
}
else {
last_respawn_rate = 0;
}
gettimeofday(&last_respawn, NULL);
uwsgi.respawn_delta = last_respawn.tv_sec;
if (uwsgi_respawn_worker(uwsgi.mywid))
return 0;
// end of the loop
}
// never here
}
char *uwsgi_format_airbrake_backtrace(struct uwsgi_thread *ut) {
struct uwsgi_airbrake_config *uacc = (struct uwsgi_airbrake_config *) ut->data;
xmlChar *xmlbuff;
int buffersize;
xmlDocPtr doc = NULL;
xmlNodePtr notice_node = NULL, node = NULL, line_node = NULL, errnode = NULL;
char *msg = NULL;
doc = xmlNewDoc(BAD_CAST "1.0");
notice_node = xmlNewNode(NULL, BAD_CAST "notice");
xmlNewProp(notice_node, BAD_CAST "version", BAD_CAST "2.3");
xmlDocSetRootElement(doc, notice_node);
xmlNewChild(notice_node, NULL, BAD_CAST "api-key", BAD_CAST uacc->apikey);
node = xmlNewChild(notice_node, NULL, BAD_CAST "notifier", NULL);
xmlNewChild(node, NULL, BAD_CAST "name", BAD_CAST "uWSGI");
xmlNewChild(node, NULL, BAD_CAST "version", BAD_CAST UWSGI_VERSION);
xmlNewChild(node, NULL, BAD_CAST "url", BAD_CAST "https://github.com/unbit/uwsgi");
// request env
node = xmlNewChild(notice_node, NULL, BAD_CAST "request", NULL);
node = xmlNewChild(node, NULL, BAD_CAST "cgi-data", NULL);
line_node = xmlNewChild(node, NULL, BAD_CAST "var", BAD_CAST UWSGI_VERSION);
xmlNewProp(line_node, BAD_CAST "key", BAD_CAST "uwsgi_version");
line_node = xmlNewChild(node, NULL, BAD_CAST "var", BAD_CAST __VERSION__);
xmlNewProp(line_node, BAD_CAST "key", BAD_CAST "compiled_with_version");
struct utsname uuts;
#ifdef __sun__
if (uname(&uuts) < 0) {
#else
if (uname(&uuts)) {
#endif
uwsgi_error("uname()");
}
else {
line_node = xmlNewChild(node, NULL, BAD_CAST "var", BAD_CAST uuts.sysname);
xmlNewProp(line_node, BAD_CAST "key", BAD_CAST "os_sysname");
char *os_version = uwsgi_concat3(uuts.release, "-", uuts.version);
line_node = xmlNewChild(node, NULL, BAD_CAST "var", BAD_CAST os_version);
xmlNewProp(line_node, BAD_CAST "key", BAD_CAST "os_version");
free(os_version);
line_node = xmlNewChild(node, NULL, BAD_CAST "var", BAD_CAST uuts.machine);
xmlNewProp(line_node, BAD_CAST "key", BAD_CAST "machine");
line_node = xmlNewChild(node, NULL, BAD_CAST "var", BAD_CAST uuts.nodename);
xmlNewProp(line_node, BAD_CAST "key", BAD_CAST "nodename");
}
// end request env
node = xmlNewChild(notice_node, NULL, BAD_CAST "server-environment", NULL);
xmlNewChild(node, NULL, BAD_CAST "app-version", BAD_CAST UWSGI_VERSION);
if (uacc->env) {
xmlNewChild(node, NULL, BAD_CAST "environment-name", BAD_CAST uacc->env);
}
else {
xmlNewChild(node, NULL, BAD_CAST "environment-name", BAD_CAST UWSGI_VERSION);
}
errnode = xmlNewChild(notice_node, NULL, BAD_CAST "error", NULL);
xmlNewChild(errnode, NULL, BAD_CAST "class", BAD_CAST "RuntimeError");
node = xmlNewChild(errnode, NULL, BAD_CAST "backtrace", NULL);
char *ctx = NULL;
char *text = uwsgi_str(ut->buf);
char *p = strtok_r(text, "\n", &ctx);
while (p) {
// skip log messages
if (!uwsgi_startswith(p, "***", 3))
goto next;
// backtrace line looks like this: uwsgi(simple_loop_run+0xc5) [0x451555]
// we take binary/lib as filename
// and extract method name from remaining string
char *n = strchr(p, '(');
if (n) {
*n = 0;
char *pls = strchr(n+1, '+');
if (pls) {
*pls = 0;
}
if (!strcmp("uwsgi_backtrace", n+1) || !strcmp("what_i_am_doing", n+1)) {
goto next;
}
else if (!strcmp("uwsgi_fpe", n+1)) {
msg = uwsgi_concat4("uWSGI FPE at ", n+1, " in ", p);
goto next;
}
if (!msg) {
if (strlen(n+1)) {
msg = uwsgi_concat4("uWSGI segfault at ", n+1, " in ", p);
}
else {
// method name might be missing
msg = uwsgi_concat2("uWSGI segfault in ", p);
}
}
// skip empty lines
if (!p)
goto next;
line_node = xmlNewChild(node, NULL, BAD_CAST "line", NULL);
if ((n+1)[0] == ')') {
xmlNewProp(line_node, BAD_CAST "method", BAD_CAST "()");
}
else {
xmlNewProp(line_node, BAD_CAST "method", BAD_CAST n+1);
}
xmlNewProp(line_node, BAD_CAST "file", BAD_CAST p);
//xmlNewProp(line_node, BAD_CAST "number", BAD_CAST "0");
}
next:
p = strtok_r(NULL, "\n", &ctx);
}
xmlNewChild(errnode, NULL, BAD_CAST "message", BAD_CAST msg);
xmlDocDumpFormatMemory(doc, &xmlbuff, &buffersize, 1);
xmlFreeDoc(doc);
xmlCleanupParser();
xmlMemoryDump();
free(msg);
free(text);
return (char *) xmlbuff;
}
static void uwsgi_airbrake_loop(struct uwsgi_thread *ut) {
int interesting_fd;
ut->buf = uwsgi_malloc(uwsgi.log_master_bufsize);
CURL *curl = curl_easy_init();
// ARGH !!!
if (!curl) return;
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, uwsgi.shared->options[UWSGI_OPTION_SOCKET_TIMEOUT]);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, uwsgi.shared->options[UWSGI_OPTION_SOCKET_TIMEOUT]);
curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);
curl_easy_setopt(curl, CURLOPT_READDATA, ut);
curl_easy_setopt(curl, CURLOPT_POST, 1L);
struct curl_slist *expect = NULL; expect = curl_slist_append(expect, "Expect:");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, expect);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
struct uwsgi_airbrake_config *uacc = (struct uwsgi_airbrake_config *) ut->data;
char *opts = uwsgi_str(uacc->arg);
// fill curl options
char *ctx = NULL;
char *p = strtok_r(opts, ";", &ctx);
while(p) {
uwsgi_airbrake_setopt(curl, uwsgi_str(p), uacc);
p = strtok_r(NULL, ";", &ctx);
}
for(;;) {
int ret = event_queue_wait(ut->queue, -1, &interesting_fd);
if (ret < 0) return;
if (ret == 0) continue;
if (interesting_fd != ut->pipe[1]) continue;
ssize_t rlen = read(ut->pipe[1], ut->buf, uwsgi.log_master_bufsize);
if (rlen <= 0) continue;
ut->pos = 0;
ut->len = (size_t) rlen;
ut->custom0 = 0;
char *notice = uwsgi_format_airbrake_backtrace(ut);
curl_slist_append(expect, "Accept: */*");
curl_slist_append(expect, "Content-Type: text/xml; charset=utf-8");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, expect);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, notice);
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, strlen(notice));
curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t) ut->len);
CURLcode res = curl_easy_perform(curl);
if (res != CURLE_OK) {
uwsgi_log_alarm("-curl] curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
free(notice);
}
}
int master_loop(char **argv, char **environ) {
struct timeval last_respawn;
int last_respawn_rate = 0;
pid_t diedpid;
int waitpid_status;
time_t now = 0;
int i = 0;
int rlen;
int check_interval = 1;
struct uwsgi_rb_timer *min_timeout;
struct uwsgi_rbtree *rb_timers = uwsgi_init_rb_timer();
if (uwsgi.procname_master) {
uwsgi_set_processname(uwsgi.procname_master);
}
else if (uwsgi.procname) {
uwsgi_set_processname(uwsgi.procname);
}
else if (uwsgi.auto_procname) {
uwsgi_set_processname("uWSGI master");
}
uwsgi.current_time = uwsgi_now();
uwsgi_unix_signal(SIGTSTP, suspend_resume_them_all);
uwsgi_unix_signal(SIGHUP, grace_them_all);
if (uwsgi.die_on_term) {
uwsgi_unix_signal(SIGTERM, kill_them_all);
uwsgi_unix_signal(SIGQUIT, reap_them_all);
}
else {
uwsgi_unix_signal(SIGTERM, reap_them_all);
uwsgi_unix_signal(SIGQUIT, kill_them_all);
}
uwsgi_unix_signal(SIGINT, kill_them_all);
uwsgi_unix_signal(SIGUSR1, stats);
if (uwsgi.auto_snapshot) {
uwsgi_unix_signal(SIGURG, uwsgi_restore_auto_snapshot);
}
atexit(uwsgi_master_cleanup_hooks);
uwsgi.master_queue = event_queue_init();
/* route signals to workers... */
#ifdef UWSGI_DEBUG
uwsgi_log("adding %d to signal poll\n", uwsgi.shared->worker_signal_pipe[0]);
#endif
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->worker_signal_pipe[0]);
if (uwsgi.master_fifo) {
uwsgi.master_fifo_fd = uwsgi_master_fifo();
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.master_fifo_fd);
}
if (uwsgi.spoolers) {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->spooler_signal_pipe[0]);
}
if (uwsgi.mules_cnt > 0) {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->mule_signal_pipe[0]);
}
if (uwsgi.log_master) {
uwsgi.log_master_buf = uwsgi_malloc(uwsgi.log_master_bufsize);
if (!uwsgi.threaded_logger) {
#ifdef UWSGI_DEBUG
uwsgi_log("adding %d to master logging\n", uwsgi.shared->worker_log_pipe[0]);
#endif
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->worker_log_pipe[0]);
if (uwsgi.req_log_master) {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.shared->worker_req_log_pipe[0]);
}
}
else {
uwsgi_threaded_logger_spawn();
}
}
#ifdef UWSGI_SSL
uwsgi_start_legions();
#endif
uwsgi_metrics_start_collector();
uwsgi_add_reload_fds();
uwsgi_cache_start_sweepers();
uwsgi_cache_start_sync_servers();
uwsgi.wsgi_req->buffer = uwsgi.workers[0].cores[0].buffer;
if (uwsgi.has_emperor) {
if (uwsgi.emperor_proxy) {
uwsgi.emperor_fd_proxy = bind_to_unix(uwsgi.emperor_proxy, uwsgi.listen_queue, 0, 0);
if (uwsgi.emperor_fd_proxy < 0) exit(1);
if (chmod(uwsgi.emperor_proxy, S_IRUSR|S_IWUSR)) {
uwsgi_error("[emperor-proxy] chmod()");
exit(1);
}
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.emperor_fd_proxy);
}
else {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.emperor_fd);
}
}
if (uwsgi.zerg_server) {
uwsgi.zerg_server_fd = bind_to_unix(uwsgi.zerg_server, uwsgi.listen_queue, 0, 0);
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.zerg_server_fd);
uwsgi_log("*** Zerg server enabled on %s ***\n", uwsgi.zerg_server);
}
if (uwsgi.stats) {
char *tcp_port = strrchr(uwsgi.stats, ':');
if (tcp_port) {
// disable deferred accept for this socket
int current_defer_accept = uwsgi.no_defer_accept;
uwsgi.no_defer_accept = 1;
uwsgi.stats_fd = bind_to_tcp(uwsgi.stats, uwsgi.listen_queue, tcp_port);
uwsgi.no_defer_accept = current_defer_accept;
}
else {
uwsgi.stats_fd = bind_to_unix(uwsgi.stats, uwsgi.listen_queue, uwsgi.chmod_socket, uwsgi.abstract_socket);
}
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.stats_fd);
uwsgi_log("*** Stats server enabled on %s fd: %d ***\n", uwsgi.stats, uwsgi.stats_fd);
}
if (uwsgi.stats_pusher_instances) {
if (!uwsgi_thread_new(uwsgi_stats_pusher_loop)) {
uwsgi_log("!!! unable to spawn stats pusher thread !!!\n");
exit(1);
}
}
if (uwsgi.udp_socket) {
uwsgi.udp_fd = bind_to_udp(uwsgi.udp_socket, 0, 0);
if (uwsgi.udp_fd < 0) {
uwsgi_log("unable to bind to udp socket. SNMP services will be disabled.\n");
}
else {
uwsgi_log("UDP server enabled.\n");
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.udp_fd);
}
}
uwsgi.snmp_fd = uwsgi_setup_snmp();
if (uwsgi.status.is_cheap) {
uwsgi_add_sockets_to_queue(uwsgi.master_queue, -1);
for (i = 1; i <= uwsgi.numproc; i++) {
uwsgi.workers[i].cheaped = 1;
}
uwsgi_log("cheap mode enabled: waiting for socket connection...\n");
}
// spawn mules
for (i = 0; i < uwsgi.mules_cnt; i++) {
size_t mule_patch_size = 0;
uwsgi.mules[i].patch = uwsgi_string_get_list(&uwsgi.mules_patches, i, &mule_patch_size);
uwsgi_mule(i + 1);
}
// spawn gateways
for (i = 0; i < ushared->gateways_cnt; i++) {
if (ushared->gateways[i].pid == 0) {
gateway_respawn(i);
}
}
// spawn daemons
uwsgi_daemons_spawn_all();
// first subscription
uwsgi_subscribe_all(0, 1);
// sync the cache store if needed
uwsgi_cache_sync_all();
if (uwsgi.queue_store && uwsgi.queue_filesize) {
if (msync(uwsgi.queue_header, uwsgi.queue_filesize, MS_ASYNC)) {
uwsgi_error("msync()");
}
}
// update touches timestamps
uwsgi_check_touches(uwsgi.touch_reload);
uwsgi_check_touches(uwsgi.touch_logrotate);
uwsgi_check_touches(uwsgi.touch_logreopen);
uwsgi_check_touches(uwsgi.touch_chain_reload);
uwsgi_check_touches(uwsgi.touch_workers_reload);
uwsgi_check_touches(uwsgi.touch_gracefully_stop);
// update exec touches
struct uwsgi_string_list *usl = uwsgi.touch_exec;
while (usl) {
char *space = strchr(usl->value, ' ');
if (space) {
*space = 0;
usl->len = strlen(usl->value);
usl->custom_ptr = space + 1;
}
usl = usl->next;
}
uwsgi_check_touches(uwsgi.touch_exec);
// update signal touches
usl = uwsgi.touch_signal;
while (usl) {
char *space = strchr(usl->value, ' ');
if (space) {
*space = 0;
usl->len = strlen(usl->value);
usl->custom_ptr = space + 1;
}
usl = usl->next;
}
uwsgi_check_touches(uwsgi.touch_signal);
// fsmon
uwsgi_fsmon_setup();
// setup cheaper algos (can be stacked)
uwsgi.cheaper_algo = uwsgi_cheaper_algo_spare;
if (uwsgi.requested_cheaper_algo) {
uwsgi.cheaper_algo = NULL;
struct uwsgi_cheaper_algo *uca = uwsgi.cheaper_algos;
while (uca) {
if (!strcmp(uca->name, uwsgi.requested_cheaper_algo)) {
uwsgi.cheaper_algo = uca->func;
break;
}
uca = uca->next;
}
if (!uwsgi.cheaper_algo) {
uwsgi_log("unable to find requested cheaper algorithm, falling back to spare\n");
uwsgi.cheaper_algo = uwsgi_cheaper_algo_spare;
}
}
// here really starts the master loop
for (;;) {
//uwsgi_log("uwsgi.ready_to_reload %d %d\n", uwsgi.ready_to_reload, uwsgi.numproc);
// run master_cycle hook for every plugin
for (i = 0; i < uwsgi.gp_cnt; i++) {
if (uwsgi.gp[i]->master_cycle) {
uwsgi.gp[i]->master_cycle();
}
}
for (i = 0; i < 256; i++) {
if (uwsgi.p[i]->master_cycle) {
uwsgi.p[i]->master_cycle();
}
}
// check for death (before reload !!!)
uwsgi_master_check_death();
// check for realod
if (uwsgi_master_check_reload(argv)) {
return -1;
}
// check chain reload
uwsgi_master_check_chain();
// check if some worker is taking too much to die...
uwsgi_master_check_mercy();
// check for daemons (smart and dumb)
uwsgi_daemons_smart_check();
if (uwsgi.respawn_snapshots) {
for (i = 1; i <= uwsgi.respawn_snapshots; i++) {
if (uwsgi_respawn_worker(i))
return 0;
}
uwsgi.respawn_snapshots = 0;
}
if (uwsgi.restore_snapshot) {
uwsgi_master_restore_snapshot();
continue;
}
// cheaper management
if (uwsgi.cheaper && !uwsgi.status.is_cheap && !uwsgi_instance_is_reloading && !uwsgi_instance_is_dying && !uwsgi.workers[0].suspended) {
if (!uwsgi_calc_cheaper())
return 0;
}
// check if someone is dead
diedpid = waitpid(WAIT_ANY, &waitpid_status, WNOHANG);
if (diedpid == -1) {
if (errno == ECHILD) {
// something did not work as expected, just assume all has been cleared
uwsgi_master_commit_status();
diedpid = 0;
}
else {
uwsgi_error("waitpid()");
/* here is better to reload all the uWSGI stack */
uwsgi_log("something horrible happened...\n");
reap_them_all(0);
exit(1);
}
}
// no one died just run all of the standard master tasks
if (diedpid == 0) {
/* all processes ok, doing status scan after N seconds */
check_interval = uwsgi.shared->options[UWSGI_OPTION_MASTER_INTERVAL];
if (!check_interval)
check_interval = 1;
// add unregistered file monitors
// locking is not needed as monitors can only increase
for (i = 0; i < ushared->files_monitored_cnt; i++) {
if (!ushared->files_monitored[i].registered) {
ushared->files_monitored[i].fd = event_queue_add_file_monitor(uwsgi.master_queue, ushared->files_monitored[i].filename, &ushared->files_monitored[i].id);
ushared->files_monitored[i].registered = 1;
}
}
// add unregistered timers
// locking is not needed as timers can only increase
for (i = 0; i < ushared->timers_cnt; i++) {
if (!ushared->timers[i].registered) {
ushared->timers[i].fd = event_queue_add_timer(uwsgi.master_queue, &ushared->timers[i].id, ushared->timers[i].value);
ushared->timers[i].registered = 1;
}
}
// add unregistered rb_timers
// locking is not needed as rb_timers can only increase
for (i = 0; i < ushared->rb_timers_cnt; i++) {
if (!ushared->rb_timers[i].registered) {
ushared->rb_timers[i].uwsgi_rb_timer = uwsgi_add_rb_timer(rb_timers, uwsgi_now() + ushared->rb_timers[i].value, &ushared->rb_timers[i]);
ushared->rb_timers[i].registered = 1;
}
}
int interesting_fd = -1;
if (ushared->rb_timers_cnt > 0) {
min_timeout = uwsgi_min_rb_timer(rb_timers, NULL);
if (min_timeout == NULL) {
check_interval = uwsgi.shared->options[UWSGI_OPTION_MASTER_INTERVAL];
}
else {
check_interval = min_timeout->value - uwsgi_now();
if (check_interval <= 0) {
expire_rb_timeouts(rb_timers);
check_interval = 0;
}
}
}
// wait for event
rlen = event_queue_wait(uwsgi.master_queue, check_interval, &interesting_fd);
if (rlen == 0) {
if (ushared->rb_timers_cnt > 0) {
expire_rb_timeouts(rb_timers);
}
}
// check uwsgi-cron table
if (ushared->cron_cnt) {
uwsgi_manage_signal_cron(uwsgi_now());
}
if (uwsgi.crons) {
uwsgi_manage_command_cron(uwsgi_now());
}
// some event returned
if (rlen > 0) {
// if the following function returns -1, a new worker has just spawned
if (uwsgi_master_manage_events(interesting_fd)) {
return 0;
}
}
now = uwsgi_now();
if (now - uwsgi.current_time < 1) {
continue;
}
uwsgi.current_time = now;
// checking logsize
if (uwsgi.logfile) {
uwsgi_check_logrotate();
}
// this will be incremented at (more or less) regular intervals
uwsgi.master_cycles++;
// recalculate requests counter on race conditions risky configurations
// a bit of inaccuracy is better than locking;)
uwsgi_master_fix_request_counters();
// check for idle
uwsgi_master_check_idle();
check_interval = uwsgi.shared->options[UWSGI_OPTION_MASTER_INTERVAL];
if (!check_interval)
check_interval = 1;
// get listen_queue status
struct uwsgi_socket *uwsgi_sock = uwsgi.sockets;
int tmp_queue = 0;
while (uwsgi_sock) {
if (uwsgi_sock->family == AF_INET) {
uwsgi_sock->queue = uwsgi_get_tcp_info(uwsgi_sock->fd);
}
#ifdef __linux__
#ifdef SIOBKLGQ
else if (uwsgi_sock->family == AF_UNIX) {
uwsgi_sock->queue = get_linux_unbit_SIOBKLGQ(uwsgi_sock->fd);
}
#endif
#endif
if (uwsgi_sock->queue > tmp_queue) {
tmp_queue = uwsgi_sock->queue;
}
uwsgi_sock = uwsgi_sock->next;
}
// fix queue size on multiple sockets
uwsgi.shared->load = tmp_queue;
// check if some worker has to die (harakiri, evil checks...)
uwsgi_master_check_workers_deadline();
uwsgi_master_check_gateways_deadline();
uwsgi_master_check_mules_deadline();
uwsgi_master_check_spoolers_deadline();
uwsgi_master_check_crons_deadline();
uwsgi_master_check_mountpoints();
#ifdef __linux__
#ifdef MADV_MERGEABLE
if (uwsgi.linux_ksm > 0 && (uwsgi.master_cycles % uwsgi.linux_ksm) == 0) {
uwsgi_linux_ksm_map();
}
#endif
#endif
// resubscribe every 10 cycles by default
if (((uwsgi.subscriptions || uwsgi.subscriptions2) && ((uwsgi.master_cycles % uwsgi.subscribe_freq) == 0 || uwsgi.master_cycles == 1)) && !uwsgi_instance_is_reloading && !uwsgi_instance_is_dying && !uwsgi.workers[0].suspended) {
uwsgi_subscribe_all(0, 0);
}
uwsgi_cache_sync_all();
if (uwsgi.queue_store && uwsgi.queue_filesize && uwsgi.queue_store_sync && ((uwsgi.master_cycles % uwsgi.queue_store_sync) == 0)) {
if (msync(uwsgi.queue_header, uwsgi.queue_filesize, MS_ASYNC)) {
uwsgi_error("msync()");
}
}
// check touch_reload
if (!uwsgi_instance_is_reloading && !uwsgi_instance_is_dying) {
char *touched = uwsgi_check_touches(uwsgi.touch_reload);
if (touched) {
uwsgi_log_verbose("*** %s has been touched... grace them all !!! ***\n", touched);
uwsgi_block_signal(SIGHUP);
grace_them_all(0);
uwsgi_unblock_signal(SIGHUP);
continue;
}
touched = uwsgi_check_touches(uwsgi.touch_workers_reload);
if (touched) {
uwsgi_log_verbose("*** %s has been touched... workers reload !!! ***\n", touched);
uwsgi_reload_workers();
continue;
}
touched = uwsgi_check_touches(uwsgi.touch_chain_reload);
if (touched) {
if (uwsgi.status.chain_reloading == 0) {
uwsgi_log_verbose("*** %s has been touched... chain reload !!! ***\n", touched);
uwsgi.status.chain_reloading = 1;
}
else {
uwsgi_log_verbose("*** %s has been touched... but chain reload is already running ***\n", touched);
}
}
// be sure to run it as the last touch check
touched = uwsgi_check_touches(uwsgi.touch_exec);
if (touched) {
if (uwsgi_run_command(touched, NULL, -1) >= 0) {
uwsgi_log_verbose("[uwsgi-touch-exec] running %s\n", touched);
}
}
touched = uwsgi_check_touches(uwsgi.touch_signal);
if (touched) {
uint8_t signum = atoi(touched);
uwsgi_route_signal(signum);
uwsgi_log_verbose("[uwsgi-touch-signal] raising %u\n", signum);
}
}
continue;
}
// no one died
if (diedpid <= 0)
continue;
// check for deadlocks first
uwsgi_deadlock_check(diedpid);
// reload gateways and daemons only on normal workflow (+outworld status)
if (!uwsgi_instance_is_reloading && !uwsgi_instance_is_dying) {
if (uwsgi_master_check_emperor_death(diedpid))
continue;
if (uwsgi_master_check_spoolers_death(diedpid))
continue;
if (uwsgi_master_check_mules_death(diedpid))
continue;
if (uwsgi_master_check_gateways_death(diedpid))
continue;
if (uwsgi_master_check_daemons_death(diedpid))
continue;
if (uwsgi_master_check_cron_death(diedpid))
continue;
}
/* What happens here ?
case 1) the diedpid is not a worker, report it and continue
case 2) the diedpid is a worker and we are not in a reload procedure -> reload it
case 3) the diedpid is a worker and we are in graceful reload -> uwsgi.ready_to_reload++ and continue
case 3) the diedpid is a worker and we are in brutal reload -> uwsgi.ready_to_die++ and continue
*/
int thewid = find_worker_id(diedpid);
if (thewid <= 0) {
// check spooler, mules, gateways and daemons
struct uwsgi_spooler *uspool = uwsgi.spoolers;
while (uspool) {
if (uspool->pid > 0 && diedpid == uspool->pid) {
uwsgi_log("spooler (pid: %d) annihilated\n", (int) diedpid);
goto next;
}
uspool = uspool->next;
}
for (i = 0; i < uwsgi.mules_cnt; i++) {
if (uwsgi.mules[i].pid == diedpid) {
uwsgi_log("mule %d (pid: %d) annihilated\n", i + 1, (int) diedpid);
goto next;
}
}
for (i = 0; i < ushared->gateways_cnt; i++) {
if (ushared->gateways[i].pid == diedpid) {
uwsgi_log("gateway %d (%s, pid: %d) annihilated\n", i + 1, ushared->gateways[i].fullname, (int) diedpid);
goto next;
}
}
if (uwsgi_daemon_check_pid_death(diedpid))
goto next;
if (WIFEXITED(waitpid_status)) {
uwsgi_log("subprocess %d exited with code %d\n", (int) diedpid, WEXITSTATUS(waitpid_status));
}
else if (WIFSIGNALED(waitpid_status)) {
uwsgi_log("subprocess %d exited by signal %d\n", (int) diedpid, WTERMSIG(waitpid_status));
}
else if (WIFSTOPPED(waitpid_status)) {
uwsgi_log("subprocess %d stopped\n", (int) diedpid);
}
next:
continue;
}
// ok a worker died...
uwsgi.workers[thewid].pid = 0;
// only to be safe :P
uwsgi.workers[thewid].harakiri = 0;
// ok, if we are reloading or dying, just continue the master loop
// as soon as all of the workers have pid == 0, the action (exit, or reload) is triggered
if (uwsgi_instance_is_reloading || uwsgi_instance_is_dying) {
if (!uwsgi.workers[thewid].cursed_at)
uwsgi.workers[thewid].cursed_at = uwsgi_now();
uwsgi_log("worker %d buried after %d seconds\n", thewid, (int) (uwsgi_now() - uwsgi.workers[thewid].cursed_at));
uwsgi.workers[thewid].cursed_at = 0;
continue;
}
// if we are stopping workers, just end here
if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_FAILED_APP_CODE) {
uwsgi_log("OOPS ! failed loading app in worker %d (pid %d) :( trying again...\n", thewid, (int) diedpid);
}
else if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_DE_HIJACKED_CODE) {
uwsgi_log("...restoring worker %d (pid: %d)...\n", thewid, (int) diedpid);
}
else if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_EXCEPTION_CODE) {
uwsgi_log("... monitored exception detected, respawning worker %d (pid: %d)...\n", thewid, (int) diedpid);
}
else if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_QUIET_CODE) {
// noop
}
else if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_BRUTAL_RELOAD_CODE) {
uwsgi_log("!!! inconsistent state reported by worker %d (pid: %d) !!!\n", thewid, (int) diedpid);
reap_them_all(0);
continue;
}
else if (uwsgi.workers[thewid].manage_next_request) {
if (WIFSIGNALED(waitpid_status)) {
uwsgi_log("DAMN ! worker %d (pid: %d) died, killed by signal %d :( trying respawn ...\n", thewid, (int) diedpid, (int) WTERMSIG(waitpid_status));
}
else {
uwsgi_log("DAMN ! worker %d (pid: %d) died :( trying respawn ...\n", thewid, (int) diedpid);
}
}
else if (uwsgi.workers[thewid].cursed_at > 0) {
uwsgi_log("worker %d killed successfully (pid: %d)\n", thewid, (int) diedpid);
}
// manage_next_request is zero, but killed by signal...
else if (WIFSIGNALED(waitpid_status)) {
uwsgi_log("DAMN ! worker %d (pid: %d) MISTERIOUSLY killed by signal %d :( trying respawn ...\n", thewid, (int) diedpid, (int) WTERMSIG(waitpid_status));
}
if (uwsgi.workers[thewid].cheaped == 1) {
uwsgi_log("uWSGI worker %d cheaped.\n", thewid);
continue;
}
// avoid fork bombing
gettimeofday(&last_respawn, NULL);
if (last_respawn.tv_sec <= uwsgi.respawn_delta + check_interval) {
last_respawn_rate++;
if (last_respawn_rate > uwsgi.numproc) {
if (uwsgi.forkbomb_delay > 0) {
uwsgi_log("worker respawning too fast !!! i have to sleep a bit (%d seconds)...\n", uwsgi.forkbomb_delay);
/* use --forkbomb-delay 0 to disable sleeping */
sleep(uwsgi.forkbomb_delay);
}
last_respawn_rate = 0;
}
}
else {
last_respawn_rate = 0;
}
gettimeofday(&last_respawn, NULL);
uwsgi.respawn_delta = last_respawn.tv_sec;
// are we chain reloading it ?
if (uwsgi.status.chain_reloading == thewid) {
uwsgi.status.chain_reloading++;
}
// respawn the worker (if needed)
if (uwsgi_respawn_worker(thewid))
return 0;
// end of the loop
}
// never here
}
/*
CHANGED in 2.0.7: wsgi_req is useless !
*/
char *uwsgi_spool_request(struct wsgi_request *wsgi_req, char *buf, size_t len, char *body, size_t body_len) {
struct timeval tv;
static uint64_t internal_counter = 0;
int fd = -1;
struct spooler_req sr;
if (len > 0xffff) {
uwsgi_log("[uwsgi-spooler] args buffer is limited to 64k, use the 'body' for bigger values\n");
return NULL;
}
// parse the request buffer
memset(&sr, 0, sizeof(struct spooler_req));
uwsgi_hooked_parse(buf, len, spooler_req_parser_hook, &sr);
struct uwsgi_spooler *uspool = uwsgi.spoolers;
if (!uspool) {
uwsgi_log("[uwsgi-spooler] no spooler available\n");
return NULL;
}
// if it is a number, get the spooler by id instead of by name
if (sr.spooler && sr.spooler_len) {
uspool = uwsgi_get_spooler_by_name(sr.spooler, sr.spooler_len);
if (!uspool) {
uwsgi_log("[uwsgi-spooler] unable to find spooler \"%.*s\"\n", sr.spooler_len, sr.spooler);
return NULL;
}
}
// this lock is for threads, the pid value in filename will avoid multiprocess races
uwsgi_lock(uspool->lock);
// we increase it even if the request fails
internal_counter++;
gettimeofday(&tv, NULL);
char *filename = NULL;
size_t filename_len = 0;
if (sr.priority && sr.priority_len) {
filename_len = strlen(uspool->dir) + sr.priority_len + strlen(uwsgi.hostname) + 256;
filename = uwsgi_malloc(filename_len);
int ret = snprintf(filename, filename_len, "%s/%.*s", uspool->dir, (int) sr.priority_len, sr.priority);
if (ret <= 0 || ret >= (int) filename_len) {
uwsgi_log("[uwsgi-spooler] error generating spooler filename\n");
free(filename);
uwsgi_unlock(uspool->lock);
return NULL;
}
// no need to check for errors...
(void) mkdir(filename, 0777);
ret = snprintf(filename, filename_len, "%s/%.*s/uwsgi_spoolfile_on_%s_%d_%llu_%d_%llu_%llu", uspool->dir, (int)sr.priority_len, sr.priority, uwsgi.hostname, (int) getpid(), (unsigned long long) internal_counter, rand(),
(unsigned long long) tv.tv_sec, (unsigned long long) tv.tv_usec);
if (ret <= 0 || ret >=(int) filename_len) {
uwsgi_log("[uwsgi-spooler] error generating spooler filename\n");
free(filename);
uwsgi_unlock(uspool->lock);
return NULL;
}
}
else {
filename_len = strlen(uspool->dir) + strlen(uwsgi.hostname) + 256;
filename = uwsgi_malloc(filename_len);
int ret = snprintf(filename, filename_len, "%s/uwsgi_spoolfile_on_%s_%d_%llu_%d_%llu_%llu", uspool->dir, uwsgi.hostname, (int) getpid(), (unsigned long long) internal_counter,
rand(), (unsigned long long) tv.tv_sec, (unsigned long long) tv.tv_usec);
if (ret <= 0 || ret >= (int) filename_len) {
uwsgi_log("[uwsgi-spooler] error generating spooler filename\n");
free(filename);
uwsgi_unlock(uspool->lock);
return NULL;
}
}
fd = open(filename, O_CREAT | O_EXCL | O_WRONLY, S_IRUSR | S_IWUSR);
if (fd < 0) {
uwsgi_error_open(filename);
free(filename);
uwsgi_unlock(uspool->lock);
return NULL;
}
// now lock the file, it will no be runnable, until the lock is not removed
// a race could come if the spooler take the file before fcntl is called
// in such case the spooler will detect a zeroed file and will retry later
if (uwsgi_fcntl_lock(fd)) {
close(fd);
free(filename);
uwsgi_unlock(uspool->lock);
return NULL;
}
struct uwsgi_header uh;
uh.modifier1 = 17;
uh.modifier2 = 0;
uh.pktsize = (uint16_t) len;
#ifdef __BIG_ENDIAN__
uh.pktsize = uwsgi_swap16(uh.pktsize);
#endif
if (write(fd, &uh, 4) != 4) {
uwsgi_log("[spooler] unable to write header for %s\n", filename);
goto clear;
}
if (write(fd, buf, len) != (ssize_t) len) {
uwsgi_log("[spooler] unable to write args for %s\n", filename);
goto clear;
}
if (body && body_len > 0) {
if ((size_t) write(fd, body, body_len) != body_len) {
uwsgi_log("[spooler] unable to write body for %s\n", filename);
goto clear;
}
}
if (sr.at > 0) {
#ifdef __UCLIBC__
struct timespec ts[2];
ts[0].tv_sec = sr.at;
ts[0].tv_nsec = 0;
ts[1].tv_sec = sr.at;
ts[1].tv_nsec = 0;
if (futimens(fd, ts)) {
uwsgi_error("uwsgi_spooler_request()/futimens()");
}
#else
struct timeval tv[2];
tv[0].tv_sec = sr.at;
tv[0].tv_usec = 0;
tv[1].tv_sec = sr.at;
tv[1].tv_usec = 0;
#ifdef __sun__
if (futimesat(fd, NULL, tv)) {
#else
if (futimes(fd, tv)) {
#endif
uwsgi_error("uwsgi_spooler_request()/futimes()");
}
#endif
}
// here the file will be unlocked too
close(fd);
if (!uwsgi.spooler_quiet)
uwsgi_log("[spooler] written %lu bytes to file %s\n", (unsigned long) len + body_len + 4, filename);
// and here waiting threads can continue
uwsgi_unlock(uspool->lock);
/* wake up the spoolers attached to the specified dir ... (HACKY)
no need to fear races, as USR1 is harmless an all of the uWSGI processes...
it could be a problem if a new process takes the old pid, but modern systems should avoid that
*/
struct uwsgi_spooler *spoolers = uwsgi.spoolers;
while (spoolers) {
if (!strcmp(spoolers->dir, uspool->dir)) {
if (spoolers->pid > 0 && spoolers->running == 0) {
(void) kill(spoolers->pid, SIGUSR1);
}
}
spoolers = spoolers->next;
}
return filename;
clear:
uwsgi_unlock(uspool->lock);
uwsgi_error("uwsgi_spool_request()/write()");
if (unlink(filename)) {
uwsgi_error("uwsgi_spool_request()/unlink()");
}
free(filename);
// unlock the file too
close(fd);
return NULL;
}
void spooler(struct uwsgi_spooler *uspool) {
// prevent process blindly reading stdin to make mess
int nullfd;
// asked by Marco Beri
#ifdef __HAIKU__
#ifdef UWSGI_DEBUG
uwsgi_log("lowering spooler priority to %d\n", B_LOW_PRIORITY);
#endif
set_thread_priority(find_thread(NULL), B_LOW_PRIORITY);
#else
#ifdef UWSGI_DEBUG
uwsgi_log("lowering spooler priority to %d\n", PRIO_MAX);
#endif
setpriority(PRIO_PROCESS, getpid(), PRIO_MAX);
#endif
nullfd = open("/dev/null", O_RDONLY);
if (nullfd < 0) {
uwsgi_error_open("/dev/null");
exit(1);
}
if (nullfd != 0) {
dup2(nullfd, 0);
close(nullfd);
}
int spooler_event_queue = event_queue_init();
int interesting_fd = -1;
if (uwsgi.master_process) {
event_queue_add_fd_read(spooler_event_queue, uwsgi.shared->spooler_signal_pipe[1]);
}
// reset the tasks counter
uspool->tasks = 0;
for (;;) {
if (chdir(uspool->dir)) {
uwsgi_error("chdir()");
exit(1);
}
if (uwsgi.spooler_ordered) {
#ifdef __linux__
spooler_scandir(uspool, NULL);
#else
spooler_readdir(uspool, NULL);
#endif
}
else {
spooler_readdir(uspool, NULL);
}
int timeout = uwsgi.shared->spooler_frequency ? uwsgi.shared->spooler_frequency : uwsgi.spooler_frequency;
if (wakeup > 0) {
timeout = 0;
}
if (event_queue_wait(spooler_event_queue, timeout, &interesting_fd) > 0) {
if (uwsgi.master_process) {
if (interesting_fd == uwsgi.shared->spooler_signal_pipe[1]) {
uwsgi_receive_signal(interesting_fd, "spooler", (int) getpid());
}
}
}
// avoid races
uint64_t tmp_wakeup = wakeup;
if (tmp_wakeup > 0) {
tmp_wakeup--;
}
wakeup = tmp_wakeup;
}
}
void uwsgi_fork_server(char *socket) {
// map fd 0 to /dev/null to avoid mess
uwsgi_remap_fd(0, "/dev/null");
int fd = bind_to_unix(socket, uwsgi.listen_queue, uwsgi.chmod_socket, uwsgi.abstract_socket);
if (fd < 0) exit(1);
// automatically receive credentials (TODO make something useful with them, like checking the pid is from the Emperor)
if (uwsgi_socket_passcred(fd)) exit(1);
// initialize the event queue
int eq = event_queue_init();
if (uwsgi.has_emperor) {
event_queue_add_fd_read(eq, uwsgi.emperor_fd);
}
event_queue_add_fd_read(eq, fd);
// now start waiting for connections
for(;;) {
int interesting_fd = -1;
int rlen = event_queue_wait(eq, -1, &interesting_fd);
if (rlen <= 0) continue;
if (uwsgi.has_emperor && interesting_fd == uwsgi.emperor_fd) {
char byte;
ssize_t rlen = read(uwsgi.emperor_fd, &byte, 1);
if (rlen > 0) {
uwsgi_log_verbose("received message %d from emperor\n", byte);
}
exit(0);
}
if (interesting_fd != fd) continue;
struct sockaddr_un client_src;
socklen_t client_src_len = 0;
int client_fd = accept(fd, (struct sockaddr *) &client_src, &client_src_len);
if (client_fd < 0) {
uwsgi_error("uwsgi_fork_server()/accept()");
continue;
}
char hbuf[4];
pid_t ppid = -1;
uid_t uid = -1;
gid_t gid = -1;
int fds_count = 8;
size_t remains = 4;
// we can receive up to 8 fds (generally from 1 to 3)
int fds[8];
// we only read 4 bytes header
ssize_t len = uwsgi_recv_cred_and_fds(client_fd, hbuf, remains, &ppid, &uid, &gid, fds, &fds_count);
uwsgi_log_verbose("[uwsgi-fork-server] connection from pid: %d uid: %d gid:%d fds:%d\n", ppid, uid, gid, fds_count);
if (len <= 0 || fds_count < 1) {
uwsgi_error("uwsgi_fork_server()/recvmsg()");
goto end;
}
remains -= len;
if (uwsgi_read_nb(client_fd, hbuf + (4-remains), remains, uwsgi.socket_timeout)) {
uwsgi_error("uwsgi_fork_server()/uwsgi_read_nb()");
goto end;
}
struct uwsgi_header *uh = (struct uwsgi_header *) hbuf;
// this memory area must be freed in the right place !!!
char *body_argv = uwsgi_malloc(uh->_pktsize);
if (uwsgi_read_nb(client_fd, body_argv, uh->_pktsize, uwsgi.socket_timeout)) {
free(body_argv);
uwsgi_error("uwsgi_fork_server()/uwsgi_read_nb()");
goto end;
}
pid_t pid = fork();
if (pid < 0) {
free(body_argv);
int i;
for(i=0;i<fds_count;i++) close(fds[i]);
// error on fork()
uwsgi_error("uwsgi_fork_server()/fork()");
goto end;
}
else if (pid > 0) {
free(body_argv);
// close inherited decriptors
int i;
for(i=0;i<fds_count;i++) close(fds[i]);
// wait for child death...
waitpid(pid, NULL, 0);
goto end;
}
else {
// close Emperor channels
// we do not close others file desctiptor as lot
// of funny tricks could be accomplished with them
if (uwsgi.has_emperor) {
close(uwsgi.emperor_fd);
if (uwsgi.emperor_fd_config > -1) close(uwsgi.emperor_fd_config);
}
// set EMPEROR_FD and FD_CONFIG env vars
char *uef = uwsgi_num2str(fds[0]);
if (setenv("UWSGI_EMPEROR_FD", uef, 1)) {
uwsgi_error("uwsgi_fork_server()/setenv()");
exit(1);
}
free(uef);
int pipe_config = -1;
int on_demand = -1;
if (uh->modifier2 & VASSAL_HAS_CONFIG && fds_count > 1) {
pipe_config = fds[1];
char *uef = uwsgi_num2str(pipe_config);
if (setenv("UWSGI_EMPEROR_FD_CONFIG", uef, 1)) {
uwsgi_error("uwsgi_fork_server()/setenv()");
exit(1);
}
free(uef);
}
if (uh->modifier2 & VASSAL_HAS_ON_DEMAND && fds_count > 1) {
if (pipe_config > -1) {
if (fds_count > 2) {
on_demand = fds[2];
}
}
else {
on_demand = fds[1];
}
}
// dup the on_demand socket to 0 and close it
if (on_demand > -1) {
if (dup2(on_demand, 0) < 0) {
uwsgi_error("uwsgi_fork_server()/dup2()");
exit(1);
}
close(on_demand);
}
// now fork again and die
pid_t new_pid = fork();
if (new_pid < 0) {
uwsgi_error("uwsgi_fork_server()/fork()");
exit(1);
}
else if (new_pid > 0) {
exit(0);
}
else {
// send the pid to the client_fd and close it
struct uwsgi_buffer *ub = uwsgi_buffer_new(uwsgi.page_size);
// leave space for header
ub->pos = 4;
if (uwsgi_buffer_append_keynum(ub, "pid", 3, getpid())) exit(1);
// fix uwsgi header
if (uwsgi_buffer_set_uh(ub, 35, 0)) goto end;
// send_pid()
if (uwsgi_write_nb(client_fd, ub->buf, ub->pos, uwsgi.socket_timeout)) exit(1);
close(client_fd);
uwsgi_log("double fork() and reparenting successful (new pid: %d)\n", getpid());
uwsgi_buffer_destroy(ub);
// now parse the uwsgi packet array and build the argv
struct uwsgi_string_list *usl = NULL, *usl_argv = NULL;
uwsgi_hooked_parse_array(body_argv, uh->_pktsize, parse_argv_hook, &usl_argv);
free(body_argv);
// build new argc/argv
uwsgi.new_argc = 0;
size_t procname_len = 1;
uwsgi_foreach(usl, usl_argv) {
uwsgi.new_argc++;
procname_len += usl->len + 1;
}
char *new_procname = uwsgi_calloc(procname_len);
uwsgi.new_argv = uwsgi_calloc(sizeof(char *) * (uwsgi.new_argc + 1));
int counter = 0;
uwsgi_foreach(usl, usl_argv) {
uwsgi.new_argv[counter] = usl->value;
strcat(new_procname, usl->value);
strcat(new_procname, " ");
counter++;
}
// fix process name
uwsgi_set_processname(new_procname);
free(new_procname);
// this is the only step required to have a consistent environment
uwsgi.fork_socket = NULL;
// this avoids the process to re-exec itself
uwsgi.exit_on_reload = 1;
// fixup the Emperor communication
uwsgi_check_emperor();
// continue with uWSGI startup
return;
}
}