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0.9.8
uwsgi/master.c
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roberto@sirius 208aea8aca two new management flag for backlog queue
2011-06-01 10:00:17 +02:00

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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 expire_rb_timeouts(struct rb_root *root) {
time_t current = time(NULL);
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, time(NULL) + usrbt->value, usrbt);
}
continue;
}
break;
}
}
void uwsgi_subscribe(char *subscription) {
char *ssb;
char subscrbuf[4096];
uint16_t ustrlen;
char *udp_address = strchr(subscription,':');
if (!udp_address) return;
char *subscription_key = strchr(udp_address+1, ':');
if (!subscription_key) return;
udp_address = uwsgi_concat2n(subscription, subscription_key-subscription, "", 0);
ssb = subscrbuf;
ustrlen = 3;
*ssb++ = (uint8_t) (ustrlen & 0xff);
*ssb++ = (uint8_t) ((ustrlen >>8) & 0xff);
memcpy(ssb, "key", ustrlen);
ssb+=ustrlen;
ustrlen = strlen(subscription_key+1);
*ssb++ = (uint8_t) (ustrlen & 0xff);
*ssb++ = (uint8_t) ((ustrlen >>8) & 0xff);
memcpy(ssb, subscription_key+1, ustrlen);
ssb+=ustrlen;
ustrlen = 7;
*ssb++ = (uint8_t) (ustrlen & 0xff);
*ssb++ = (uint8_t) ((ustrlen >>8) & 0xff);
memcpy(ssb, "address", ustrlen);
ssb+=ustrlen;
ustrlen = strlen(uwsgi.sockets->name);
*ssb++ = (uint8_t) (ustrlen & 0xff);
*ssb++ = (uint8_t) ((ustrlen >>8) & 0xff);
memcpy(ssb, uwsgi.sockets->name, ustrlen);
ssb+=ustrlen;
send_udp_message(224, udp_address, subscrbuf, ssb-subscrbuf);
free(udp_address);
}
#ifdef __linux__
void 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;
}
uwsgi.shared->options[UWSGI_OPTION_BACKLOG_STATUS] = 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]++;
}
}
}
#endif
void manage_cluster_announce(char *key, uint16_t keylen, char *val, uint16_t vallen, void *data) {
char *tmpstr;
struct uwsgi_cluster_node *ucn = (struct uwsgi_cluster_node *) data;
uwsgi_log("%.*s = %.*s\n", keylen, key, vallen, val);
if (!uwsgi_strncmp("hostname", 8, key, keylen)) {
strncpy(ucn->nodename, val, UMIN(vallen, 255));
}
if (!uwsgi_strncmp("address", 7, key, keylen)) {
strncpy(ucn->name, val, UMIN(vallen, 100));
}
if (!uwsgi_strncmp("workers", 7, key, keylen)) {
tmpstr = uwsgi_concat2n(val, vallen, "", 0);
ucn->workers = atoi(tmpstr);
free(tmpstr);
}
if (!uwsgi_strncmp("requests", 8, key, keylen)) {
tmpstr = uwsgi_concat2n(val, vallen, "", 0);
ucn->requests = strtoul(tmpstr, NULL, 0);
free(tmpstr);
}
}
void master_loop(char **argv, char **environ) {
uint64_t tmp_counter;
char log_buf[4096];
struct timeval last_respawn;
int last_respawn_rate = 0;
int pid_found = 0;
pid_t diedpid;
int waitpid_status;
int ready_to_reload = 0;
int ready_to_die = 0;
int master_has_children = 0;
uint8_t uwsgi_signal;
time_t last_request_timecheck = 0;
uint64_t last_request_count = 0;
#ifdef UWSGI_UDP
struct sockaddr_in udp_client;
socklen_t udp_len;
char udp_client_addr[16];
int udp_managed = 0;
int udp_fd = -1 ;
#ifdef UWSGI_MULTICAST
char *cluster_opt_buf = NULL;
int cluster_opt_size = 4;
char *cptrbuf;
uint16_t ustrlen;
struct uwsgi_header *uh;
struct uwsgi_cluster_node nucn;
#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();
struct tm *uwsgi_cron_delta;
uwsgi.current_time = time(NULL);
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);
}
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.log_master) {
#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]);
}
uwsgi.wsgi_req->buffer = uwsgi.async_buf[0];
if (uwsgi.has_emperor) {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.emperor_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);
}
}
if (uwsgi.cheap) {
uwsgi_add_sockets_to_queue(uwsgi.master_queue);
uwsgi_log("cheap mode enabled: waiting for socket connection...\n");
}
#ifdef UWSGI_MULTICAST
if (uwsgi.cluster) {
event_queue_add_fd_read(uwsgi.master_queue, uwsgi.cluster_fd);
for(i=0;i<uwsgi.exported_opts_cnt;i++) {
//uwsgi_log("%s\n", uwsgi.exported_opts[i]->key);
cluster_opt_size += 2+strlen(uwsgi.exported_opts[i]->key);
if (uwsgi.exported_opts[i]->value) {
cluster_opt_size += 2+strlen(uwsgi.exported_opts[i]->value);
}
else {
cluster_opt_size += 2 + 1;
}
}
//uwsgi_log("cluster opts size: %d\n", cluster_opt_size);
cluster_opt_buf = uwsgi_malloc(cluster_opt_size);
uh = (struct uwsgi_header *) cluster_opt_buf;
uh->modifier1 = 99;
uh->pktsize = cluster_opt_size - 4;
uh->modifier2 = 1;
#ifdef __BIG_ENDIAN__
uh->pktsize = uwsgi_swap16(uh->pktsize);
#endif
cptrbuf = cluster_opt_buf+4;
for(i=0;i<uwsgi.exported_opts_cnt;i++) {
//uwsgi_log("%s\n", uwsgi.exported_opts[i]->key);
ustrlen = strlen(uwsgi.exported_opts[i]->key);
*cptrbuf++ = (uint8_t) (ustrlen & 0xff);
*cptrbuf++ = (uint8_t) ((ustrlen >>8) & 0xff);
memcpy(cptrbuf, uwsgi.exported_opts[i]->key, ustrlen);
cptrbuf+=ustrlen;
if (uwsgi.exported_opts[i]->value) {
ustrlen = strlen(uwsgi.exported_opts[i]->value);
*cptrbuf++ = (uint8_t) (ustrlen & 0xff);
*cptrbuf++ = (uint8_t) ((ustrlen >>8) & 0xff);
memcpy(cptrbuf, uwsgi.exported_opts[i]->value, ustrlen);
}
else {
ustrlen = 1;
*cptrbuf++ = (uint8_t) (ustrlen & 0xff);
*cptrbuf++ = (uint8_t) ((ustrlen >>8) & 0xff);
*cptrbuf = '1' ;
}
cptrbuf+=ustrlen;
}
}
#endif
#endif
#ifdef UWSGI_SNMP
if (uwsgi.snmp) {
if (uwsgi.snmp_community) {
if (strlen(uwsgi.snmp_community) > 72) {
uwsgi_log( "*** warning the supplied SNMP community string will be truncated to 72 chars ***\n");
memcpy(uwsgi.shared->snmp_community, uwsgi.snmp_community, 72);
}
else {
memcpy(uwsgi.shared->snmp_community, uwsgi.snmp_community, strlen(uwsgi.snmp_community) + 1);
}
}
uwsgi.shared->snmp_gvalue[0].type = SNMP_COUNTER64;
uwsgi.shared->snmp_gvalue[0].val = &uwsgi.workers[0].requests;
for(i=0;i<uwsgi.numproc;i++) {
uwsgi.shared->snmp_gvalue[30+i].type = SNMP_COUNTER64;
uwsgi.shared->snmp_gvalue[30+i].val = &uwsgi.workers[i+1].requests;
}
if (uwsgi.snmp_addr) {
snmp_fd = bind_to_udp(uwsgi.snmp_addr, 0, 0);
if (snmp_fd < 0) {
uwsgi_log( "unable to bind to udp socket. SNMP service will be disabled.\n");
}
else {
uwsgi_log( "SNMP server enabled on %s\n", uwsgi.snmp_addr);
event_queue_add_fd_read(uwsgi.master_queue, snmp_fd);
}
}
else {
uwsgi_log( "SNMP agent enabled.\n");
}
}
#endif
/*
*/
// spawn fat gateways
for(i=0;i<uwsgi.gateways_cnt;i++) {
if (uwsgi.gateways[i].pid == 0) {
gateway_respawn(i);
}
}
// first subscription
for(i=0;i<uwsgi.subscriptions_cnt;i++) {
uwsgi_log("requested subscription for %s\n", uwsgi.subscriptions[i]);
uwsgi_subscribe(uwsgi.subscriptions[i]);
}
// 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, uwsgi.queue_filesize, MS_ASYNC)) {
uwsgi_error("msync()");
}
}
if (uwsgi.touch_reload) {
struct stat tr_st;
if (stat(uwsgi.touch_reload, &tr_st)) {
uwsgi_error("stat()");
uwsgi_log("unable to stat() %s, touch-reload will be disabled\n", uwsgi.touch_reload);
uwsgi.touch_reload = NULL;
}
else {
uwsgi.last_touch_reload_mtime = tr_st.st_mtime;
}
}
for (;;) {
//uwsgi_log("ready_to_reload %d %d\n", ready_to_reload, uwsgi.numproc);
if (uwsgi.master_mercy) {
if (uwsgi.master_mercy < time(NULL)) {
for(i=1;i<=uwsgi.numproc;i++) {
if (uwsgi.workers[i].pid > 0) {
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) { ready_to_die++;}
else if (uwsgi.to_heaven) { ready_to_reload++;}
}
else {
uwsgi_error("kill()");
}
}
}
}
}
if (uwsgi.respawn_workers) {
for(i=1;i<=uwsgi.numproc;i++) {
if (uwsgi_respawn_worker(i)) return;
}
uwsgi.respawn_workers = 0;
}
if (uwsgi.restore_snapshot) {
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;
continue;
}
if ((uwsgi.cheap || ready_to_die >= uwsgi.numproc) && uwsgi.to_hell) {
// call a series of waitpid to ensure all processes (gateways and daemons) are dead
for(i=0;i<(uwsgi.gateways_cnt+ushared->daemons_cnt);i++) {
diedpid = waitpid(WAIT_ANY, &waitpid_status, WNOHANG);
}
uwsgi_log( "goodbye to uWSGI.\n");
exit(0);
}
if ( (uwsgi.cheap || ready_to_reload >= uwsgi.numproc) && uwsgi.to_heaven) {
// call a series of waitpid to ensure all processes (gateways and daemons) are dead
for(i=0;i<(uwsgi.gateways_cnt+ushared->daemons_cnt);i++) {
diedpid = waitpid(WAIT_ANY, &waitpid_status, WNOHANG);
}
if (uwsgi.exit_on_reload) {
uwsgi_log("uWSGI: GAME OVER (insert coin)\n");
exit(0);
}
uwsgi_log( "binary reloading uWSGI...\n");
if (chdir(uwsgi.cwd)) {
uwsgi_error("chdir()");
exit(1);
}
/* check fd table (a module can obviosly open some fd on initialization...) */
uwsgi_log( "closing all non-uwsgi socket fds > 2 (_SC_OPEN_MAX = %ld)...\n", sysconf(_SC_OPEN_MAX));
for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) {
int found = 0;
struct uwsgi_socket *uwsgi_sock = uwsgi.sockets;
while(uwsgi_sock) {
if (i == uwsgi_sock->fd) {
uwsgi_log("found fd %d mapped to socket %d (%s)\n", i, uwsgi_get_socket_num(uwsgi_sock), uwsgi_sock->name);
found = 1;
break;
}
uwsgi_sock = uwsgi_sock->next;
}
if (!found) {
if (uwsgi.has_emperor) {
if (i == uwsgi.emperor_fd) {
found = 1;
}
}
}
if (!found) {
#ifdef __APPLE__
fcntl(i, F_SETFD, FD_CLOEXEC);
#else
close(i);
#endif
}
}
uwsgi_log( "running %s\n", uwsgi.binary_path);
argv[0] = uwsgi.binary_path;
//strcpy (argv[0], uwsgi.binary_path);
execvp(uwsgi.binary_path, argv);
uwsgi_error("execvp()");
// never here
exit(1);
}
if (!uwsgi.cheap) {
if (uwsgi.numproc > 0 || uwsgi.gateways_cnt > 0 || ushared->daemons_cnt > 0) {
master_has_children = 1;
}
#ifdef UWSGI_SPOOLER
if (uwsgi.spool_dir && uwsgi.shared->spooler_pid > 0) {
master_has_children = 1;
}
#endif
}
if (!master_has_children) {
diedpid = 0;
}
else {
diedpid = waitpid(WAIT_ANY, &waitpid_status, WNOHANG);
if (diedpid == -1) {
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 daemons
// locking is not needed as daemons can only increase (for now)
for(i=0;i<ushared->daemons_cnt;i++) {
if (!ushared->daemons[i].registered) {
uwsgi_log("spawning daemon %s\n", ushared->daemons[i].command);
spawn_daemon(&ushared->daemons[i]);
ushared->daemons[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, time(NULL) + 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 - time(NULL);
if (check_interval <= 0) {
expire_rb_timeouts(rb_timers);
check_interval = 0;
}
}
}
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.current_time = time(NULL);
uwsgi_cron_delta = localtime( &uwsgi.current_time );
if (uwsgi_cron_delta) {
// fix month
uwsgi_cron_delta->tm_mon++;
uwsgi_lock(uwsgi.cron_table_lock);
for(i=0;i<ushared->cron_cnt;i++) {
struct uwsgi_cron *ucron = &ushared->cron[i];
int uc_minute, uc_hour, uc_day, uc_month, uc_week;
uc_minute = ucron->minute;
uc_hour = ucron->hour;
uc_day = ucron->day;
uc_month = ucron->month;
uc_week = ucron->week;
if (ucron->minute == -1) uc_minute = uwsgi_cron_delta->tm_min;
if (ucron->hour == -1) uc_hour = uwsgi_cron_delta->tm_hour;
if (ucron->month == -1) uc_month = uwsgi_cron_delta->tm_mon;
// mday and wday are ORed
if (ucron->day == -1 && ucron->week == -1) {
if (ucron->day == -1) uc_day = uwsgi_cron_delta->tm_mday;
if (ucron->week == -1) uc_week = uwsgi_cron_delta->tm_wday;
}
else if (ucron->day == -1) {
ucron->day = uwsgi_cron_delta->tm_mday;
}
else if (ucron->week == -1) {
ucron->week = uwsgi_cron_delta->tm_wday;
}
else {
if (ucron->day == uwsgi_cron_delta->tm_mday) {
ucron->week = uwsgi_cron_delta->tm_wday;
}
else if (ucron->week == uwsgi_cron_delta->tm_wday) {
ucron->day = uwsgi_cron_delta->tm_mday;
}
}
if (uwsgi_cron_delta->tm_min == uc_minute &&
uwsgi_cron_delta->tm_hour == uc_hour &&
uwsgi_cron_delta->tm_mon == uc_month &&
uwsgi_cron_delta->tm_mday == uc_day &&
uwsgi_cron_delta->tm_wday == uc_week) {
// date match, signal it ?
if (uwsgi.current_time - ucron->last_job > 60) {
uwsgi_route_signal(ucron->sig);
ucron->last_job = uwsgi.current_time;
}
}
}
uwsgi_unlock(uwsgi.cron_table_lock);
}
else {
uwsgi_error("localtime()");
}
}
if (rlen > 0) {
if (uwsgi.log_master) {
if (interesting_fd == uwsgi.shared->worker_log_pipe[0]) {
rlen = read(uwsgi.shared->worker_log_pipe[0], log_buf, 4096);
if (rlen > 0) {
if (uwsgi.log_syslog) {
syslog(LOG_INFO, "%.*s", rlen, log_buf);
}
#ifdef UWSGI_ZEROMQ
else if (uwsgi.zmq_log_socket) {
zmq_msg_t msg;
if (zmq_msg_init_size (&msg, rlen) == 0) {
memcpy(zmq_msg_data(&msg), log_buf, rlen);
zmq_send(uwsgi.zmq_log_socket, &msg, 0);
zmq_msg_close(&msg);
}
}
#endif
else if (uwsgi.log_socket) {
sendto(uwsgi.log_socket_fd, log_buf, rlen, 0, &uwsgi.log_socket_addr->sa, uwsgi.log_socket_size);
}
// TODO allow uwsgi.logger = func
}
}
}
if (uwsgi.has_emperor) {
if (interesting_fd == uwsgi.emperor_fd) {
char byte;
rlen = read(uwsgi.emperor_fd, &byte, 1);
if (rlen > 0) {
uwsgi_log("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) {
grace_them_all(0);
}
}
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);
}
}
}
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);
for(i=1;i<=uwsgi.numproc;i++) {
if (uwsgi_respawn_worker(i)) return;
}
break;
}
uwsgi_sock = uwsgi_sock->next;
}
if (found) continue;
}
#ifdef UWSGI_SNMP
if (uwsgi.snmp_addr && interesting_fd == snmp_fd) {
udp_len = sizeof(udp_client);
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);
}
continue;
}
#endif
#ifdef UWSGI_UDP
if (uwsgi.udp_socket && interesting_fd == udp_fd) {
udp_len = sizeof(udp_client);
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
udp_managed = 0;
for(i=0;i<0xFF;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()");
}
}
continue;
}
#ifdef UWSGI_MULTICAST
if (interesting_fd == uwsgi.cluster_fd) {
if (uwsgi_get_dgram(uwsgi.cluster_fd, uwsgi.wsgi_requests[0])) {
continue;
}
switch(uwsgi.wsgi_requests[0]->uh.modifier1) {
case 95:
memset(&nucn, 0, sizeof(struct uwsgi_cluster_node));
#ifdef __BIG_ENDIAN__
uwsgi.wsgi_requests[0]->uh.pktsize = uwsgi_swap16(uwsgi.wsgi_requests[0]->uh.pktsize);
#endif
uwsgi_hooked_parse(uwsgi.wsgi_requests[0]->buffer, uwsgi.wsgi_requests[0]->uh.pktsize, manage_cluster_announce, &nucn);
if (nucn.name[0] != 0) {
uwsgi_cluster_add_node(&nucn, CLUSTER_NODE_DYNAMIC);
}
break;
case 96:
#ifdef __BIG_ENDIAN__
uwsgi.wsgi_requests[0]->uh.pktsize = uwsgi_swap16(uwsgi.wsgi_requests[0]->uh.pktsize);
#endif
uwsgi_log_verbose("%.*s\n", uwsgi.wsgi_requests[0]->uh.pktsize, uwsgi.wsgi_requests[0]->buffer);
break;
case 98:
if (kill(getpid(), SIGHUP)) {
uwsgi_error("kill()");
}
break;
case 99:
if (uwsgi.cluster_nodes) break;
if (uwsgi.wsgi_requests[0]->uh.modifier2 == 0) {
uwsgi_log("requested configuration data, sending %d bytes\n", cluster_opt_size);
sendto(uwsgi.cluster_fd, cluster_opt_buf, cluster_opt_size, 0, (struct sockaddr *) &uwsgi.mc_cluster_addr, sizeof(uwsgi.mc_cluster_addr));
}
break;
case 73:
#ifdef __BIG_ENDIAN__
uwsgi.wsgi_requests[0]->uh.pktsize = uwsgi_swap16(uwsgi.wsgi_requests[0]->uh.pktsize);
#endif
uwsgi_log_verbose("[uWSGI cluster %s] new node available: %.*s\n", uwsgi.cluster, uwsgi.wsgi_requests[0]->uh.pktsize, uwsgi.wsgi_requests[0]->buffer);
break;
}
continue;
}
#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) continue;
next_iteration = 0;
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;
}
}
}
if (next_iteration) continue;
// 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) {
uwsgi_log("received uwsgi signal %d from workers\n", uwsgi_signal);
uwsgi_route_signal(uwsgi_signal);
}
else {
uwsgi_log_verbose("lost connection with worker %d\n", i);
close(interesting_fd);
//uwsgi.workers[i].pipe[0] = -1;
}
}
}
uwsgi.current_time = time(NULL);
// checking logsize
if (uwsgi.logfile) {
uwsgi.shared->logsize = lseek(2, 0, SEEK_CUR);
/*
if (uwsgi.shared->logsize > 8192) {
//uwsgi_log("logsize: %d\n", uwsgi.shared->logsize);
char *new_logfile = uwsgi_malloc(strlen(uwsgi.logfile) + 14 + 1);
memset(new_logfile, 0, strlen(uwsgi.logfile) + 14 + 1);
if (!rename(uwsgi.logfile, new_logfile)) {
// close 2, reopen logfile dup'it and gracefully reload workers;
}
free(new_logfile);
}
*/
}
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 = time(NULL);
if (!last_request_timecheck) last_request_timecheck = uwsgi.current_time;
if (last_request_count != uwsgi.workers[0].requests) {
last_request_timecheck = uwsgi.current_time;
last_request_count = uwsgi.workers[0].requests;
}
else if (uwsgi.current_time - last_request_timecheck > uwsgi.idle) {
uwsgi_log("workers have been inactive for more than %d seconds\n", uwsgi.idle);
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()");
}
}
master_has_children = 0;
uwsgi.cheap = 1;
uwsgi_add_sockets_to_queue(uwsgi.master_queue);
uwsgi_log("cheap mode enabled: waiting for socket connection...\n");
last_request_timecheck = 0;
continue;
}
}
// remove expired cache items TODO use rb_tree timeouts
if (uwsgi.cache_max_items > 0) {
for(i=0;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(uwsgi.cache_items[i].key, uwsgi.cache_items[i].keysize);
}
}
uwsgi_rwunlock(uwsgi.cache_lock);
}
}
check_interval = uwsgi.shared->options[UWSGI_OPTION_MASTER_INTERVAL];
if (!check_interval)
check_interval = 1;
#ifdef __linux__
struct uwsgi_socket *uwsgi_sock = uwsgi.sockets;
while(uwsgi_sock) {
if (uwsgi_sock->family == AF_INET) {
get_linux_tcp_info(uwsgi_sock->fd);
}
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) {
/* first try to invoke the harakiri() custom handler */
/* TODO */
/* then brutally kill the worker */
uwsgi_log("*** HARAKIRI ON WORKER %d (pid: %d) ***\n", i, uwsgi.workers[i].pid);
if (uwsgi.harakiri_verbose) {
#ifdef __linux__
int proc_file;
char proc_buf[4096];
char proc_name[64];
ssize_t proc_len;
if (snprintf(proc_name, 64, "/proc/%d/syscall", uwsgi.workers[i].pid) > 0) {
memset(proc_buf, 0, 4096);
proc_file = open(proc_name, O_RDONLY);
if (proc_file >= 0) {
proc_len = read(proc_file, proc_buf, 4096);
if (proc_len > 0) {
uwsgi_log("HARAKIRI: -- syscall> %s", proc_buf);
}
close(proc_file);
}
}
if (snprintf(proc_name, 64, "/proc/%d/wchan", uwsgi.workers[i].pid) > 0) {
memset(proc_buf, 0, 4096);
proc_file = open(proc_name, O_RDONLY);
if (proc_file >= 0) {
proc_len = read(proc_file, proc_buf, 4096);
if (proc_len > 0) {
uwsgi_log("HARAKIRI: -- wchan> %s\n", proc_buf);
}
close(proc_file);
}
}
#endif
}
kill(uwsgi.workers[i].pid, SIGUSR2);
// allow SIGUSR2 to be delivered
sleep(1);
kill(uwsgi.workers[i].pid, SIGKILL);
// to avoid races
uwsgi.workers[i].harakiri = 0;
}
}
// need to find a better way
//uwsgi.workers[i].last_running_time = uwsgi.workers[i].running_time;
}
#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
if (uwsgi.subscriptions_cnt > 0 && ((uwsgi.master_cycles % 10) == 0 || uwsgi.master_cycles == 1)) {
for(i=0;i<uwsgi.subscriptions_cnt;i++) {
uwsgi_subscribe(uwsgi.subscriptions[i]);
}
}
#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, uwsgi.queue_filesize, MS_ASYNC)) {
uwsgi_error("msync()");
}
}
// check touch_reload
if (uwsgi.touch_reload && !uwsgi.to_heaven && !uwsgi.to_hell) {
struct stat tr_st;
if (stat(uwsgi.touch_reload, &tr_st)) {
uwsgi_error("stat()");
uwsgi_log("unable to stat() %s, touch-reload will be disabled\n", uwsgi.touch_reload);
uwsgi.touch_reload = NULL;
}
else {
if (tr_st.st_mtime > uwsgi.last_touch_reload_mtime) {
uwsgi_log("*** %s has been touched... grace them all !!! ***\n", uwsgi.touch_reload);
grace_them_all(0);
}
}
}
// now check for lb pool
continue;
}
// reload gateways and daemons only on normal workflow
if (!uwsgi.to_heaven && !uwsgi.to_hell) {
#ifdef UWSGI_SPOOLER
/* reload the spooler */
if (uwsgi.spool_dir && uwsgi.shared->spooler_pid > 0) {
if (diedpid == uwsgi.shared->spooler_pid) {
uwsgi_log( "OOOPS the spooler is no more...trying respawn...\n");
uwsgi.shared->spooler_pid = spooler_start();
continue;
}
}
#endif
/* reload the gateways */
// TODO reload_gateway(diedpid);
pid_found = 0;
for(i=0;i<uwsgi.gateways_cnt;i++) {
if (uwsgi.gateways[i].pid == diedpid) {
gateway_respawn(i);
pid_found = 1;
break;
}
}
if (pid_found) continue;
/* reload the daemons */
// TODO reload_gateway(diedpid);
pid_found = 0;
for(i=0;i<uwsgi.shared->daemons_cnt;i++) {
if (uwsgi.shared->daemons[i].pid == diedpid) {
spawn_daemon(&uwsgi.shared->daemons[i]);
pid_found = 1;
break;
}
}
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 -> ready_to_reload++ and continue
case 3) the diedpid is a worker and we are in brutal reload -> ready_to_die++ and continue
*/
uwsgi.mywid = find_worker_id(diedpid);
if (uwsgi.mywid <= 0) {
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);
}
continue;
}
else {
if (uwsgi.to_heaven) {
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) {
ready_to_die++;
uwsgi.workers[uwsgi.mywid].pid = 0;
// only to be safe :P
uwsgi.workers[uwsgi.mywid].harakiri = 0;
continue;
}
if (uwsgi.workers[uwsgi.mywid].manage_next_request) {
uwsgi_log( "DAMN ! worker %d (pid: %d) died :( trying respawn ...\n", uwsgi.mywid, (int)diedpid);
}
gettimeofday(&last_respawn, NULL);
if (last_respawn.tv_sec == uwsgi.respawn_delta) {
last_respawn_rate++;
if (last_respawn_rate > uwsgi.numproc) {
uwsgi_log( "worker respawning too fast !!! i have to sleep a bit...\n");
/* TODO, user configurable fork throttler */
sleep(2);
last_respawn_rate = 0;
}
}
else {
last_respawn_rate = 0;
}
gettimeofday(&last_respawn, NULL);
uwsgi.respawn_delta = last_respawn.tv_sec;
// close the communication pipe
/*
close(uwsgi.workers[uwsgi.mywid].pipe[0]);
if (socketpair(AF_UNIX, SOCK_STREAM, 0, uwsgi.workers[uwsgi.mywid].pipe)) {
uwsgi_error("socketpair()\n");
continue;
}
*/
if (uwsgi_respawn_worker(uwsgi.mywid)) return;
}
}
}
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