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ceebaa7d9d8bf8f79ea1b223a36f75e44adda233
uwsgi/core/master.c
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Roberto De Ioris ceebaa7d9d fixed indentation
2012-11-09 12:16:39 +01:00

1635 lines
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#include "uwsgi.h"
extern struct uwsgi_server uwsgi;
void uwsgi_restore_auto_snapshot(int signum) {
if (uwsgi.workers[1].snapshot > 0) {
uwsgi.restore_snapshot = 1;
}
else {
uwsgi_log("[WARNING] no snapshot available\n");
}
}
void uwsgi_block_signal(int signum) {
sigset_t smask;
sigemptyset(&smask);
sigaddset(&smask, signum);
if (sigprocmask(SIG_BLOCK, &smask, NULL)) {
uwsgi_error("sigprocmask()");
}
}
void uwsgi_unblock_signal(int signum) {
sigset_t smask;
sigemptyset(&smask);
sigaddset(&smask, signum);
if (sigprocmask(SIG_UNBLOCK, &smask, NULL)) {
uwsgi_error("sigprocmask()");
}
}
#ifdef UWSGI_SNMP
void uwsgi_master_manage_snmp(int snmp_fd) {
struct sockaddr_in udp_client;
socklen_t udp_len = sizeof(udp_client);
ssize_t rlen = recvfrom(snmp_fd, uwsgi.wsgi_req->buffer, uwsgi.buffer_size, 0, (struct sockaddr *) &udp_client, &udp_len);
if (rlen < 0) {
uwsgi_error("recvfrom()");
}
else if (rlen > 0) {
manage_snmp(snmp_fd, (uint8_t *) uwsgi.wsgi_req->buffer, rlen, &udp_client);
}
}
#endif
#ifdef UWSGI_UDP
void uwsgi_master_manage_udp(int udp_fd) {
struct sockaddr_in udp_client;
char udp_client_addr[16];
int i;
socklen_t udp_len = sizeof(udp_client);
ssize_t rlen = recvfrom(udp_fd, uwsgi.wsgi_req->buffer, uwsgi.buffer_size, 0, (struct sockaddr *) &udp_client, &udp_len);
if (rlen < 0) {
uwsgi_error("recvfrom()");
}
else if (rlen > 0) {
memset(udp_client_addr, 0, 16);
if (inet_ntop(AF_INET, &udp_client.sin_addr.s_addr, udp_client_addr, 16)) {
if (uwsgi.wsgi_req->buffer[0] == UWSGI_MODIFIER_MULTICAST_ANNOUNCE) {
}
#ifdef UWSGI_SNMP
else if (uwsgi.wsgi_req->buffer[0] == 0x30 && uwsgi.snmp) {
manage_snmp(udp_fd, (uint8_t *) uwsgi.wsgi_req->buffer, rlen, &udp_client);
}
#endif
else {
// loop the various udp manager until one returns true
int udp_managed = 0;
for (i = 0; i < 256; i++) {
if (uwsgi.p[i]->manage_udp) {
if (uwsgi.p[i]->manage_udp(udp_client_addr, udp_client.sin_port, uwsgi.wsgi_req->buffer, rlen)) {
udp_managed = 1;
break;
}
}
}
// else a simple udp logger
if (!udp_managed) {
uwsgi_log("[udp:%s:%d] %.*s", udp_client_addr, ntohs(udp_client.sin_port), rlen, uwsgi.wsgi_req->buffer);
}
}
}
else {
uwsgi_error("inet_ntop()");
}
}
}
#endif
void uwsgi_master_manage_emperor() {
char byte;
ssize_t rlen = read(uwsgi.emperor_fd, &byte, 1);
if (rlen > 0) {
uwsgi_log_verbose("received message %d from emperor\n", byte);
// remove me
if (byte == 0) {
close(uwsgi.emperor_fd);
if (!uwsgi.to_hell)
kill_them_all(0);
}
// reload me
else if (byte == 1) {
// un-lazy the stack to trigger a real reload
uwsgi.lazy = 0;
uwsgi_block_signal(SIGHUP);
grace_them_all(0);
uwsgi_unblock_signal(SIGHUP);
}
}
else {
uwsgi_log("lost connection with my emperor !!!\n");
close(uwsgi.emperor_fd);
if (!uwsgi.to_hell)
kill_them_all(0);
sleep(2);
exit(1);
}
}
void uwsgi_master_restore_snapshot() {
int i, waitpid_status;
uwsgi_log("[snapshot] restoring workers...\n");
for (i = 1; i <= uwsgi.numproc; i++) {
if (uwsgi.workers[i].pid == 0)
continue;
kill(uwsgi.workers[i].pid, SIGKILL);
if (waitpid(uwsgi.workers[i].pid, &waitpid_status, 0) < 0) {
uwsgi_error("waitpid()");
}
if (uwsgi.auto_snapshot > 0 && i > uwsgi.auto_snapshot) {
uwsgi.workers[i].pid = 0;
uwsgi.workers[i].snapshot = 0;
}
else {
uwsgi.workers[i].pid = uwsgi.workers[i].snapshot;
uwsgi.workers[i].snapshot = 0;
kill(uwsgi.workers[i].pid, SIGURG);
uwsgi_log("Restored uWSGI worker %d (pid: %d)\n", i, (int) uwsgi.workers[i].pid);
}
}
uwsgi.restore_snapshot = 0;
}
void suspend_resume_them_all(int signum) {
int i;
int suspend = 0;
if (uwsgi.workers[0].suspended == 1) {
uwsgi_log_verbose("*** (SIGTSTP received) resuming workers ***\n");
uwsgi.workers[0].suspended = 0;
}
else {
uwsgi_log_verbose("*** PAUSE (press start to resume, if you do not have a joypad send SIGTSTP) ***\n");
suspend = 1;
uwsgi.workers[0].suspended = 1;
}
// subscribe/unsubscribe if needed
struct uwsgi_string_list *subscriptions = uwsgi.subscriptions;
while (subscriptions) {
uwsgi_log("%s %s\n", suspend ? "unsubscribing from" : "subscribing to", subscriptions->value);
uwsgi_subscribe(subscriptions->value, suspend);
subscriptions = subscriptions->next;
}
for (i = 1; i <= uwsgi.numproc; i++) {
uwsgi.workers[i].suspended = suspend;
if (uwsgi.workers[i].pid > 0) {
if (kill(uwsgi.workers[i].pid, SIGTSTP)) {
uwsgi_error("kill()");
}
}
}
}
int uwsgi_master_check_mercy() {
int i, waitpid_status;
if (uwsgi.master_mercy) {
if (uwsgi.master_mercy < uwsgi_now()) {
for (i = 1; i <= uwsgi.numproc; i++) {
if (uwsgi.workers[i].pid > 0) {
if (uwsgi.lazy && uwsgi.workers[i].destroy == 0)
continue;
uwsgi_log("worker %d (pid: %d) is taking too much time to die...NO MERCY !!!\n", i, uwsgi.workers[i].pid);
if (!kill(uwsgi.workers[i].pid, SIGKILL)) {
if (waitpid(uwsgi.workers[i].pid, &waitpid_status, 0) < 0) {
uwsgi_error("waitpid()");
}
uwsgi.workers[i].pid = 0;
if (uwsgi.to_hell) {
uwsgi.ready_to_die++;
}
else if (uwsgi.to_heaven) {
uwsgi.ready_to_reload++;
}
else if (uwsgi.to_outworld) {
uwsgi.lazy_respawned++;
if (uwsgi_respawn_worker(i))
return -1;
}
}
else {
uwsgi_error("kill()");
}
}
}
uwsgi.master_mercy = 0;
}
}
return 0;
}
void expire_rb_timeouts(struct rb_root *root) {
time_t current = uwsgi_now();
struct uwsgi_rb_timer *urbt;
struct uwsgi_signal_rb_timer *usrbt;
for (;;) {
urbt = uwsgi_min_rb_timer(root);
if (urbt == NULL)
return;
if (urbt->key <= current) {
// remove the timeout and add another
usrbt = (struct uwsgi_signal_rb_timer *) urbt->data;
rb_erase(&usrbt->uwsgi_rb_timer->rbt, root);
free(usrbt->uwsgi_rb_timer);
usrbt->iterations_done++;
uwsgi_route_signal(usrbt->sig);
if (!usrbt->iterations || usrbt->iterations_done < usrbt->iterations) {
usrbt->uwsgi_rb_timer = uwsgi_add_rb_timer(root, uwsgi_now() + usrbt->value, usrbt);
}
continue;
}
break;
}
}
int uwsgi_master_log(void) {
ssize_t rlen = read(uwsgi.shared->worker_log_pipe[0], uwsgi.log_master_buf, uwsgi.log_master_bufsize);
if (rlen > 0) {
#ifdef UWSGI_ALARM
uwsgi_alarm_log_check(uwsgi.log_master_buf, rlen);
#endif
#ifdef UWSGI_PCRE
struct uwsgi_regexp_list *url = uwsgi.log_drain_rules;
while (url) {
if (uwsgi_regexp_match(url->pattern, url->pattern_extra, uwsgi.log_master_buf, rlen) >= 0) {
return 0;
}
url = url->next;
}
if (uwsgi.log_filter_rules) {
int show = 0;
url = uwsgi.log_filter_rules;
while (url) {
if (uwsgi_regexp_match(url->pattern, url->pattern_extra, uwsgi.log_master_buf, rlen) >= 0) {
show = 1;
break;
}
url = url->next;
}
if (!show)
return 0;
}
url = uwsgi.log_route;
int finish = 0;
while (url) {
if (uwsgi_regexp_match(url->pattern, url->pattern_extra, uwsgi.log_master_buf, rlen) >= 0) {
struct uwsgi_logger *ul_route = (struct uwsgi_logger *) url->custom_ptr;
if (ul_route) {
ul_route->func(ul_route, uwsgi.log_master_buf, rlen);
finish = 1;
}
}
url = url->next;
}
if (finish)
return 0;
#endif
int raw_log = 1;
struct uwsgi_logger *ul = uwsgi.choosen_logger;
while (ul) {
// check for named logger
if (ul->id) {
goto next;
}
ul->func(ul, uwsgi.log_master_buf, rlen);
raw_log = 0;
next:
ul = ul->next;
}
if (raw_log) {
rlen = write(uwsgi.original_log_fd, uwsgi.log_master_buf, rlen);
}
return 0;
}
return -1;
}
void *logger_thread_loop(void *noarg) {
struct pollfd logpoll;
// block all signals
sigset_t smask;
sigfillset(&smask);
pthread_sigmask(SIG_BLOCK, &smask, NULL);
logpoll.events = POLLIN;
logpoll.fd = uwsgi.shared->worker_log_pipe[0];
for (;;) {
int ret = poll(&logpoll, 1, -1);
if (ret > 0 && logpoll.revents & POLLIN) {
pthread_mutex_lock(&uwsgi.threaded_logger_lock);
uwsgi_master_log();
pthread_mutex_unlock(&uwsgi.threaded_logger_lock);
}
}
return NULL;
}
void *cache_sweeper_loop(void *noarg) {
int i;
// block all signals
sigset_t smask;
sigfillset(&smask);
pthread_sigmask(SIG_BLOCK, &smask, NULL);
if (!uwsgi.cache_expire_freq)
uwsgi.cache_expire_freq = 3;
// remove expired cache items TODO use rb_tree timeouts
for (;;) {
sleep(uwsgi.cache_expire_freq);
uint64_t freed_items = 0;
// skip the first slot
for (i = 1; i < (int) uwsgi.cache_max_items; i++) {
uwsgi_wlock(uwsgi.cache_lock);
if (uwsgi.cache_items[i].expires) {
if (uwsgi.cache_items[i].expires < (uint64_t) uwsgi.current_time) {
uwsgi_cache_del(NULL, 0, i);
freed_items++;
}
}
uwsgi_rwunlock(uwsgi.cache_lock);
}
if (uwsgi.cache_report_freed_items && freed_items > 0) {
uwsgi_log("freed %llu cache items\n", (unsigned long long) freed_items);
}
};
return NULL;
}
void uwsgi_subscribe(char *subscription, uint8_t cmd) {
int subfile_size;
int i;
char *key = NULL;
int keysize = 0;
char *modifier1 = NULL;
int modifier1_len = 0;
char *socket_name = NULL;
char *udp_address = subscription;
char *udp_port = NULL;
char *subscription_key = NULL;
char *sign = NULL;
// check for explicit socket_name
char *equal = strchr(subscription, '=');
if (equal) {
socket_name = subscription;
if (socket_name[0] == '=') {
equal = strchr(socket_name + 1, '=');
if (!equal)
return;
*equal = '\0';
struct uwsgi_socket *us = uwsgi_get_shared_socket_by_num(atoi(socket_name + 1));
if (!us)
return;
socket_name = us->name;
}
*equal = '\0';
udp_address = equal + 1;
}
// check for unix socket
if (udp_address[0] != '/') {
udp_port = strchr(udp_address, ':');
if (!udp_port) {
if (equal)
*equal = '=';
return;
}
subscription_key = strchr(udp_port + 1, ':');
}
else {
subscription_key = strchr(udp_address + 1, ':');
}
if (!subscription_key) {
if (equal)
*equal = '=';
return;
}
udp_address = uwsgi_concat2n(udp_address, subscription_key - udp_address, "", 0);
if (subscription_key[1] == '@') {
if (!uwsgi_file_exists(subscription_key + 2))
goto clear;
char *lines = uwsgi_open_and_read(subscription_key + 2, &subfile_size, 1, NULL);
if (subfile_size > 0) {
key = lines;
for (i = 0; i < subfile_size; i++) {
if (lines[i] == 0) {
if (keysize > 0) {
if (key[0] != '#' && key[0] != '\n') {
modifier1 = strchr(key, ',');
if (modifier1) {
modifier1[0] = 0;
modifier1++;
modifier1_len = strlen(modifier1);
keysize = strlen(key);
}
uwsgi_send_subscription(udp_address, key, keysize, uwsgi_str_num(modifier1, modifier1_len), 0, cmd, socket_name, sign);
modifier1 = NULL;
modifier1_len = 0;
}
}
break;
}
else if (lines[i] == '\n') {
if (keysize > 0) {
if (key[0] != '#' && key[0] != '\n') {
lines[i] = 0;
modifier1 = strchr(key, ',');
if (modifier1) {
modifier1[0] = 0;
modifier1++;
modifier1_len = strlen(modifier1);
keysize = strlen(key);
}
uwsgi_send_subscription(udp_address, key, keysize, uwsgi_str_num(modifier1, modifier1_len), 0, cmd, socket_name, sign);
modifier1 = NULL;
modifier1_len = 0;
lines[i] = '\n';
}
}
key = lines + i + 1;
keysize = 0;
continue;
}
keysize++;
}
free(lines);
}
}
else {
modifier1 = strchr(subscription_key + 1, ',');
if (modifier1) {
modifier1[0] = 0;
modifier1++;
sign = strchr(modifier1 + 1, ',');
if (sign) {
*sign = 0;
sign++;
}
modifier1_len = strlen(modifier1);
}
uwsgi_send_subscription(udp_address, subscription_key + 1, strlen(subscription_key + 1), uwsgi_str_num(modifier1, modifier1_len), 0, cmd, socket_name, sign);
if (modifier1)
modifier1[-1] = ',';
if (sign)
sign[-1] = ',';
}
clear:
if (equal)
*equal = '=';
free(udp_address);
}
#ifdef __linux__
int get_linux_tcp_info(int fd) {
socklen_t tis = sizeof(struct tcp_info);
if (!getsockopt(fd, IPPROTO_TCP, TCP_INFO, &uwsgi.shared->ti, &tis)) {
// a check for older linux kernels
if (!uwsgi.shared->ti.tcpi_sacked) {
return -1;
}
uwsgi.shared->load = uwsgi.shared->ti.tcpi_unacked;
uwsgi.shared->options[UWSGI_OPTION_BACKLOG_STATUS] = uwsgi.shared->ti.tcpi_unacked;
if (uwsgi.vassal_sos_backlog > 0 && uwsgi.has_emperor) {
if ((int) uwsgi.shared->ti.tcpi_unacked >= uwsgi.vassal_sos_backlog) {
// ask emperor for help
char byte = 30;
if (write(uwsgi.emperor_fd, &byte, 1) != 1) {
uwsgi_error("write()");
}
else {
uwsgi_log("asking emperor for reinforcements (backlog: %d)...\n", (int) uwsgi.shared->ti.tcpi_unacked);
}
}
}
if (uwsgi.shared->ti.tcpi_unacked >= uwsgi.shared->ti.tcpi_sacked) {
uwsgi_log_verbose("*** uWSGI listen queue of socket %d full !!! (%d/%d) ***\n", fd, uwsgi.shared->ti.tcpi_unacked, uwsgi.shared->ti.tcpi_sacked);
uwsgi.shared->options[UWSGI_OPTION_BACKLOG_ERRORS]++;
}
return uwsgi.shared->ti.tcpi_unacked;
}
return -1;
}
#include <linux/sockios.h>
#ifdef UNBIT
#define SIOBKLGQ 0x8908
#endif
#ifdef SIOBKLGQ
int get_linux_unbit_SIOBKLGQ(int fd) {
int queue = 0;
if (ioctl(fd, SIOBKLGQ, &queue) >= 0) {
uwsgi.shared->load = queue;
uwsgi.shared->options[UWSGI_OPTION_BACKLOG_STATUS] = queue;
if (queue >= uwsgi.listen_queue) {
uwsgi_log_verbose("*** uWSGI listen queue of socket %d full !!! (%d/%d) ***\n", fd, queue, uwsgi.listen_queue);
uwsgi.shared->options[UWSGI_OPTION_BACKLOG_ERRORS]++;
}
return queue;
}
return -1;
}
#endif
#endif
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);
}
if (uwsgi.requested_stats_pushers) {
if (!uwsgi_thread_new(uwsgi_stats_pusher_loop)) {
uwsgi_log("!!! unable to spawn stats pusher thread !!!\n");
exit(1);
}
}
#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();
if (uwsgi.to_outworld) {
//uwsgi_log("%d/%d\n", uwsgi.lazy_respawned, uwsgi.numproc);
if (uwsgi.lazy_respawned >= uwsgi.marked_workers || uwsgi.lazy_respawned >= uwsgi.numproc) {
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 >= uwsgi.marked_workers || uwsgi.ready_to_die >= uwsgi.numproc) && 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 >= uwsgi.marked_workers || uwsgi.ready_to_reload >= uwsgi.numproc) && 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, uwsgi_master_generate_stats);
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) {
uwsgi_sock->queue = get_linux_tcp_info(uwsgi_sock->fd);
}
#ifdef SIOBKLGQ
else if (uwsgi_sock->family == AF_UNIX) {
uwsgi_sock->queue = 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);
}
}
// 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 :( trying respawn ...\n", uwsgi.mywid, (int) diedpid, (int) WTERMSIG(waitpid_status));
}
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
}
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