void zergpool_loop(int id) {
int i;
int zergpool_queue = event_queue_init();
void *events = event_queue_alloc(ZERGPOOL_EVENTS);
struct zergpool_socket *zps = zergpool_sockets;
while(zps) {
event_queue_add_fd_read(zergpool_queue, zps->fd);
zps = zps->next;
}
for(;;) {
int nevents = event_queue_wait_multi(zergpool_queue, -1, events, ZERGPOOL_EVENTS);
for(i=0;i<nevents;i++) {
int interesting_fd = event_queue_interesting_fd(events, i);
zps = zergpool_sockets;
while(zps) {
if (zps->fd == interesting_fd) {
uwsgi_manage_zerg(zps->fd, zps->num_sockets, zps->sockets);
}
zps = zps->next;
}
}
}
}
void uwsgi_stats_pusher_loop(struct uwsgi_thread *ut) {
void *events = event_queue_alloc(1);
for (;;) {
int nevents = event_queue_wait_multi(ut->queue, 1, events, 1);
if (nevents > 0) {
int interesting_fd = event_queue_interesting_fd(events, 0);
char buf[4096];
ssize_t len = read(interesting_fd, buf, 4096);
if (len <= 0) {
uwsgi_log("[uwsgi-stats-pusher] goodbye...\n");
return;
}
uwsgi_log("[uwsgi-stats-pusher] message received from master: %.*s\n", (int) len, buf);
continue;
}
time_t now = uwsgi_now();
struct uwsgi_stats_pusher_instance *uspi = uwsgi.stats_pusher_instances;
struct uwsgi_stats *us = NULL;
while (uspi) {
int delta = uspi->freq ? uspi->freq : uwsgi.stats_pusher_default_freq;
if ((uspi->last_run + delta) <= now) {
if (!us) {
us = uwsgi_master_generate_stats();
if (!us)
goto next;
}
uspi->pusher->func(uspi, us->base, us->pos);
uspi->last_run = now;
}
next:
uspi = uspi->next;
}
if (us) {
free(us->base);
free(us);
}
}
}
static void uwsgi_offload_loop(struct uwsgi_thread *ut) {
int i;
void *events = event_queue_alloc(uwsgi.offload_threads_events);
for (;;) {
// TODO make timeout tunable
int nevents = event_queue_wait_multi(ut->queue, -1, events, uwsgi.offload_threads_events);
for (i = 0; i < nevents; i++) {
int interesting_fd = event_queue_interesting_fd(events, i);
if (interesting_fd == ut->pipe[1]) {
struct uwsgi_offload_request *uor = uwsgi_malloc(sizeof(struct uwsgi_offload_request));
ssize_t len = read(ut->pipe[1], uor, sizeof(struct uwsgi_offload_request));
if (len != sizeof(struct uwsgi_offload_request)) {
uwsgi_error("read()");
free(uor);
continue;
}
// cal the event function for the first time
if (uor->engine->event_func(ut, uor, -1)) {
uwsgi_offload_close(ut, uor);
continue;
}
uwsgi_offload_append(ut, uor);
continue;
}
// get the task from the interesting fd
struct uwsgi_offload_request *uor = uwsgi_offload_get_by_fd(ut, interesting_fd);
if (!uor)
continue;
// run the hook
if (uor->engine->event_func(ut, uor, interesting_fd)) {
uwsgi_offload_close(ut, uor);
}
}
}
}
void emperor_loop() {
// monitor a directory
struct uwsgi_instance ui_base;
struct uwsgi_instance *ui_current;
pid_t diedpid;
int waitpid_status;
int has_children = 0;
int i_am_alone = 0;
int i;
void *events;
int nevents;
int interesting_fd;
char notification_message[64];
struct rlimit rl;
uwsgi.emperor_stats_fd = -1;
if (uwsgi.emperor_pidfile) {
uwsgi_write_pidfile(uwsgi.emperor_pidfile);
}
signal(SIGPIPE, SIG_IGN);
uwsgi_unix_signal(SIGINT, royal_death);
uwsgi_unix_signal(SIGTERM, royal_death);
uwsgi_unix_signal(SIGQUIT, royal_death);
uwsgi_unix_signal(SIGUSR1, emperor_stats);
uwsgi_unix_signal(SIGHUP, emperor_massive_reload);
memset(&ui_base, 0, sizeof(struct uwsgi_instance));
if (getrlimit(RLIMIT_NOFILE, &rl)) {
uwsgi_error("getrlimit()");
exit(1);
}
uwsgi.max_fd = rl.rlim_cur;
emperor_throttle_level = uwsgi.emperor_throttle;
// the queue must be initialized before adding scanners
uwsgi.emperor_queue = event_queue_init();
emperor_build_scanners();
events = event_queue_alloc(64);
if (uwsgi.has_emperor) {
uwsgi_log("*** starting uWSGI sub-Emperor ***\n");
}
else {
uwsgi_log("*** starting uWSGI Emperor ***\n");
}
if (uwsgi.emperor_stats) {
char *tcp_port = strchr(uwsgi.emperor_stats, ':');
if (tcp_port) {
// disable deferred accept for this socket
int current_defer_accept = uwsgi.no_defer_accept;
uwsgi.no_defer_accept = 1;
uwsgi.emperor_stats_fd = bind_to_tcp(uwsgi.emperor_stats, uwsgi.listen_queue, tcp_port);
uwsgi.no_defer_accept = current_defer_accept;
}
else {
uwsgi.emperor_stats_fd = bind_to_unix(uwsgi.emperor_stats, uwsgi.listen_queue, uwsgi.chmod_socket, uwsgi.abstract_socket);
}
event_queue_add_fd_read(uwsgi.emperor_queue, uwsgi.emperor_stats_fd);
uwsgi_log("*** Emperor stats server enabled on %s fd: %d ***\n", uwsgi.emperor_stats, uwsgi.emperor_stats_fd);
}
ui = &ui_base;
int freq = 0;
for (;;) {
if (!i_am_alone) {
diedpid = waitpid(uwsgi.emperor_pid, &waitpid_status, WNOHANG);
if (diedpid < 0 || diedpid > 0) {
i_am_alone = 1;
}
}
nevents = event_queue_wait_multi(uwsgi.emperor_queue, freq, events, 64);
freq = uwsgi.emperor_freq;
for (i = 0; i < nevents; i++) {
interesting_fd = event_queue_interesting_fd(events, i);
if (uwsgi.emperor_stats && uwsgi.emperor_stats_fd > -1 && interesting_fd == uwsgi.emperor_stats_fd) {
emperor_send_stats(uwsgi.emperor_stats_fd);
continue;
}
// check if a monitor is mapped to that file descriptor
if (uwsgi_emperor_scanner_event(interesting_fd))
continue;
ui_current = emperor_get_by_fd(interesting_fd);
if (ui_current) {
char byte;
ssize_t rlen = read(interesting_fd, &byte, 1);
if (rlen <= 0) {
// SAFE
if (!ui_current->config_len) {
emperor_del(ui_current);
}
}
else {
if (byte == 17) {
ui_current->loyal = 1;
ui_current->last_loyal = uwsgi_now();
uwsgi_log("[emperor] vassal %s is now loyal\n", ui_current->name);
// remove it from the blacklist
uwsgi_emperor_blacklist_remove(ui_current->name);
// TODO post-start hook
}
// heartbeat can be used for spotting blocked instances
else if (byte == 26) {
ui_current->last_heartbeat = uwsgi_now();
}
else if (byte == 22) {
emperor_stop(ui_current);
}
else if (byte == 30 && uwsgi.emperor_broodlord > 0 && uwsgi.emperor_broodlord_count < uwsgi.emperor_broodlord) {
uwsgi_log("[emperor] going in broodlord mode: launching zergs for %s\n", ui_current->name);
char *zerg_name = uwsgi_concat3(ui_current->name, ":", "zerg");
emperor_add(NULL, zerg_name, uwsgi_now(), NULL, 0, ui_current->uid, ui_current->gid);
free(zerg_name);
}
}
}
else {
uwsgi_log("[emperor] unrecognized vassal event on fd %d\n", interesting_fd);
close(interesting_fd);
}
}
uwsgi_emperor_run_scanners();
// check for heartbeat (if required)
ui_current = ui->ui_next;
while (ui_current) {
if (ui_current->last_heartbeat > 0) {
if ((ui_current->last_heartbeat + uwsgi.emperor_heartbeat) < uwsgi_now()) {
uwsgi_log("[emperor] vassal %s sent no heartbeat in last %d seconds, respawning it...\n", ui_current->name, uwsgi.emperor_heartbeat);
// set last_heartbeat to 0 avoiding races
ui_current->last_heartbeat = 0;
emperor_respawn(ui_current, uwsgi_now());
}
}
ui_current = ui_current->ui_next;
}
// check for removed instances
ui_current = ui;
has_children = 0;
while (ui_current->ui_next) {
ui_current = ui_current->ui_next;
has_children++;
}
if (uwsgi.notify) {
if (snprintf(notification_message, 64, "The Emperor is governing %d vassals", has_children) >= 34) {
uwsgi_notify(notification_message);
}
}
if (has_children) {
diedpid = waitpid(WAIT_ANY, &waitpid_status, WNOHANG);
}
else {
// vacuum
waitpid(WAIT_ANY, &waitpid_status, WNOHANG);
diedpid = 0;
}
if (diedpid < 0) {
// it looks like it happens when OOM is triggered to Linux cgroup, but it could be a uWSGI bug :P
// by the way, fallback to a clean situation...
if (errno == ECHILD) {
uwsgi_log("--- MUTINY DETECTED !!! IMPALING VASSALS... ---\n");
ui_current = ui->ui_next;
while (ui_current) {
struct uwsgi_instance *rebel_vassal = ui_current;
ui_current = ui_current->ui_next;
emperor_del(rebel_vassal);
}
}
else {
uwsgi_error("waitpid()");
}
}
ui_current = ui;
while (ui_current->ui_next) {
ui_current = ui_current->ui_next;
if (ui_current->status == 1) {
if (ui_current->config)
free(ui_current->config);
// SAFE
emperor_del(ui_current);
break;
}
else if (ui_current->pid == diedpid) {
if (ui_current->status == 0) {
// respawn an accidentally dead instance if its exit code is not UWSGI_EXILE_CODE
if (WIFEXITED(waitpid_status) && WEXITSTATUS(waitpid_status) == UWSGI_EXILE_CODE) {
// SAFE
emperor_del(ui_current);
}
else {
// UNSAFE
emperor_add(ui_current->scanner, ui_current->name, ui_current->last_mod, ui_current->config, ui_current->config_len, ui_current->uid, ui_current->gid);
emperor_del(ui_current);
}
break;
}
else if (ui_current->status == 1) {
// remove 'marked for dead' instance
if (ui_current->config)
free(ui_current->config);
// SAFE
emperor_del(ui_current);
break;
}
}
}
}
}
void async_loop() {
if (uwsgi.async < 2) {
uwsgi_log("the async loop engine requires async mode (--async <n>)\n");
exit(1);
}
int interesting_fd, i;
struct uwsgi_rb_timer *min_timeout;
int timeout;
int is_a_new_connection;
int proto_parser_status;
uint64_t now;
struct uwsgi_async_request *current_request = NULL;
void *events = event_queue_alloc(64);
struct uwsgi_socket *uwsgi_sock;
uwsgi.async_runqueue = NULL;
uwsgi.wait_write_hook = async_wait_fd_write;
uwsgi.wait_read_hook = async_wait_fd_read;
if (uwsgi.signal_socket > -1) {
event_queue_add_fd_read(uwsgi.async_queue, uwsgi.signal_socket);
event_queue_add_fd_read(uwsgi.async_queue, uwsgi.my_signal_socket);
}
// set a default request manager
if (!uwsgi.schedule_to_req)
uwsgi.schedule_to_req = async_schedule_to_req;
if (!uwsgi.schedule_to_main) {
uwsgi_log("*** DANGER *** async mode without coroutine/greenthread engine loaded !!!\n");
}
while (uwsgi.workers[uwsgi.mywid].manage_next_request) {
now = (uint64_t) uwsgi_now();
if (uwsgi.async_runqueue) {
timeout = 0;
}
else {
min_timeout = uwsgi_min_rb_timer(uwsgi.rb_async_timeouts, NULL);
if (min_timeout) {
timeout = min_timeout->value - now;
if (timeout <= 0) {
async_expire_timeouts(now);
timeout = 0;
}
}
else {
timeout = -1;
}
}
uwsgi.async_nevents = event_queue_wait_multi(uwsgi.async_queue, timeout, events, 64);
now = (uint64_t) uwsgi_now();
// timeout ???
if (uwsgi.async_nevents == 0) {
async_expire_timeouts(now);
}
for (i = 0; i < uwsgi.async_nevents; i++) {
// manage events
interesting_fd = event_queue_interesting_fd(events, i);
// signals are executed in the main stack... in the future we could have dedicated stacks for them
if (uwsgi.signal_socket > -1 && (interesting_fd == uwsgi.signal_socket || interesting_fd == uwsgi.my_signal_socket)) {
uwsgi_receive_signal(interesting_fd, "worker", uwsgi.mywid);
continue;
}
is_a_new_connection = 0;
// new request coming in ?
uwsgi_sock = uwsgi.sockets;
while (uwsgi_sock) {
if (interesting_fd == uwsgi_sock->fd) {
is_a_new_connection = 1;
uwsgi.wsgi_req = find_first_available_wsgi_req();
if (uwsgi.wsgi_req == NULL) {
uwsgi_async_queue_is_full((time_t)now);
break;
}
// on error re-insert the request in the queue
wsgi_req_setup(uwsgi.wsgi_req, uwsgi.wsgi_req->async_id, uwsgi_sock);
if (wsgi_req_simple_accept(uwsgi.wsgi_req, interesting_fd)) {
uwsgi.async_queue_unused_ptr++;
uwsgi.async_queue_unused[uwsgi.async_queue_unused_ptr] = uwsgi.wsgi_req;
break;
}
if (wsgi_req_async_recv(uwsgi.wsgi_req)) {
uwsgi.async_queue_unused_ptr++;
uwsgi.async_queue_unused[uwsgi.async_queue_unused_ptr] = uwsgi.wsgi_req;
break;
}
// by default the core is in UWSGI_AGAIN mode
uwsgi.wsgi_req->async_status = UWSGI_AGAIN;
// some protocol (like zeromq) do not need additional parsing, just push it in the runqueue
if (uwsgi.wsgi_req->do_not_add_to_async_queue) {
runqueue_push(uwsgi.wsgi_req);
}
break;
}
uwsgi_sock = uwsgi_sock->next;
}
if (!is_a_new_connection) {
// proto event
uwsgi.wsgi_req = find_wsgi_req_proto_by_fd(interesting_fd);
if (uwsgi.wsgi_req) {
proto_parser_status = uwsgi.wsgi_req->socket->proto(uwsgi.wsgi_req);
// reset timeout
async_reset_request(uwsgi.wsgi_req);
// parsing complete
if (!proto_parser_status) {
// remove fd from event poll and fd proto table
uwsgi.async_proto_fd_table[interesting_fd] = NULL;
event_queue_del_fd(uwsgi.async_queue, interesting_fd, event_queue_read());
// put request in the runqueue
runqueue_push(uwsgi.wsgi_req);
continue;
}
else if (proto_parser_status < 0) {
uwsgi.async_proto_fd_table[interesting_fd] = NULL;
close(interesting_fd);
continue;
}
// re-add timer
async_add_timeout(uwsgi.wsgi_req, uwsgi.shared->options[UWSGI_OPTION_SOCKET_TIMEOUT]);
continue;
}
// app-registered event
uwsgi.wsgi_req = find_wsgi_req_by_fd(interesting_fd);
// unknown fd, remove it (for safety)
if (uwsgi.wsgi_req == NULL) {
close(interesting_fd);
continue;
}
// remove all the fd monitors and timeout
async_reset_request(uwsgi.wsgi_req);
uwsgi.wsgi_req->async_ready_fd = 1;
uwsgi.wsgi_req->async_last_ready_fd = interesting_fd;
// put the request in the runqueue again
runqueue_push(uwsgi.wsgi_req);
}
}
// event queue managed, give cpu to runqueue
current_request = uwsgi.async_runqueue;
while(current_request) {
// current_request could be nulled on error/end of request
struct uwsgi_async_request *next_request = current_request->next;
uwsgi.wsgi_req = current_request->wsgi_req;
uwsgi.schedule_to_req();
uwsgi.wsgi_req->switches++;
// request ended ?
if (uwsgi.wsgi_req->async_status <= UWSGI_OK ||
uwsgi.wsgi_req->waiting_fds || uwsgi.wsgi_req->async_timeout) {
// remove from the runqueue
runqueue_remove(current_request);
}
current_request = next_request;
}
}
}
void fastrouter_loop() {
int nevents;
int interesting_fd;
int new_connection;
ssize_t len;
int i;
time_t delta;
char bbuf[UMAX16];
char *tcp_port;
char *tmp_socket_name;
int tmp_socket_name_len;
struct uwsgi_subscribe_req usr;
char *magic_table[0xff];
struct uwsgi_rb_timer *min_timeout;
void *events;
struct msghdr msg;
union {
struct cmsghdr cmsg;
char control [CMSG_SPACE (sizeof (int))];
} msg_control;
struct cmsghdr *cmsg;
struct sockaddr_un fr_addr;
socklen_t fr_addr_len = sizeof(struct sockaddr_un);
struct fastrouter_session *fr_session;
struct fastrouter_session *fr_table[2048];
struct iovec iov[2];
int soopt;
socklen_t solen = sizeof(int);
int ufr_subserver = -1;
for(i=0;i<2048;i++) {
fr_table[i] = NULL;
}
ufr.queue = event_queue_init();
struct uwsgi_fastrouter_socket *ufr_sock = ufr.sockets;
while(ufr_sock) {
if (ufr_sock->name[0] == '=') {
int shared_socket = atoi(ufr_sock->name+1);
if (shared_socket >= 0) {
ufr_sock->fd = uwsgi_get_shared_socket_fd_by_num(shared_socket);
if (ufr_sock->fd == -1) {
uwsgi_log("unable to use shared socket %d\n", shared_socket);
}
}
}
else {
tcp_port = strchr(ufr_sock->name, ':');
if (tcp_port) {
ufr_sock->fd = bind_to_tcp(ufr_sock->name, uwsgi.listen_queue, tcp_port);
}
else {
ufr_sock->fd = bind_to_unix(ufr_sock->name, uwsgi.listen_queue, uwsgi.chmod_socket, uwsgi.abstract_socket);
}
}
uwsgi_log("uwsgi fastrouter/proxy bound on %s\n", ufr_sock->name);
if (!ufr.cheap) {
event_queue_add_fd_read(ufr.queue, ufr_sock->fd);
}
else {
uwsgi_log("[uwsgi-fastrouter] cheap mode requested. Waiting for subscriptions...\n");
ufr.i_am_cheap = 1;
}
ufr_sock = ufr_sock->next;
}
events = event_queue_alloc(ufr.nevents);
ufr.timeouts = uwsgi_init_rb_timer();
if (!ufr.socket_timeout) ufr.socket_timeout = 30;
if (ufr.subscription_server) {
ufr_subserver = bind_to_udp(ufr.subscription_server, 0, 0);
event_queue_add_fd_read(ufr.queue, ufr_subserver);
if (!ufr.subscription_slot) ufr.subscription_slot = 30;
// check for node status every 10 seconds
//ufr.subscriptions_check = add_check_timeout(10);
}
if (ufr.pattern) {
init_magic_table(magic_table);
}
for (;;) {
min_timeout = uwsgi_min_rb_timer(ufr.timeouts);
if (min_timeout == NULL ) {
delta = -1;
}
else {
delta = min_timeout->key - time(NULL);
if (delta <= 0) {
expire_timeouts(fr_table);
delta = 0;
}
}
nevents = event_queue_wait_multi(ufr.queue, delta, events, ufr.nevents);
if (nevents == 0) {
expire_timeouts(fr_table);
}
for (i=0;i<nevents;i++) {
tmp_socket_name = NULL;
interesting_fd = event_queue_interesting_fd(events, i);
int taken = 0;
struct uwsgi_fastrouter_socket *uwsgi_sock = ufr.sockets;
while(uwsgi_sock) {
if (interesting_fd == uwsgi_sock->fd) {
new_connection = accept(interesting_fd, (struct sockaddr *) &fr_addr, &fr_addr_len);
if (new_connection < 0) {
continue;
}
fr_table[new_connection] = alloc_fr_session();
fr_table[new_connection]->fd = new_connection;
fr_table[new_connection]->instance_fd = -1;
fr_table[new_connection]->status = FASTROUTER_STATUS_RECV_HDR;
fr_table[new_connection]->h_pos = 0;
fr_table[new_connection]->pos = 0;
fr_table[new_connection]->un = NULL;
fr_table[new_connection]->instance_failed = 0;
fr_table[new_connection]->instance_address_len = 0;
fr_table[new_connection]->hostname_len = 0;
fr_table[new_connection]->hostname = NULL;
fr_table[new_connection]->timeout = add_timeout(fr_table[new_connection]);
event_queue_add_fd_read(ufr.queue, new_connection);
taken = 1;
break;
}
uwsgi_sock = uwsgi_sock->next;
}
if (taken) {
continue;
}
if (interesting_fd == ufr_subserver) {
len = recv(ufr_subserver, bbuf, 4096, 0);
#ifdef UWSGI_EVENT_USE_PORT
event_queue_add_fd_read(ufr.queue, ufr_subserver);
#endif
if (len > 0) {
memset(&usr, 0, sizeof(struct uwsgi_subscribe_req));
uwsgi_hooked_parse(bbuf+4, len-4, fastrouter_manage_subscription, &usr);
if (uwsgi_add_subscribe_node(&ufr.subscriptions, &usr, ufr.subscription_regexp) && ufr.i_am_cheap) {
struct uwsgi_fastrouter_socket *ufr_sock = ufr.sockets;
while(ufr_sock) {
event_queue_add_fd_read(ufr.queue, ufr_sock->fd);
ufr_sock = ufr_sock->next;
}
ufr.i_am_cheap = 0;
uwsgi_log("[uwsgi-fastrouter] leaving cheap mode...\n");
}
}
}
else {
fr_session = fr_table[interesting_fd];
// something is going wrong...
if (fr_session == NULL) continue;
if (event_queue_interesting_fd_has_error(events, i)) {
close_session(fr_table, fr_session);
continue;
}
fr_session->timeout = reset_timeout(fr_session);
switch(fr_session->status) {
case FASTROUTER_STATUS_RECV_HDR:
len = recv(fr_session->fd, (char *)(&fr_session->uh) + fr_session->h_pos, 4-fr_session->h_pos, 0);
if (len <= 0) {
uwsgi_error("recv()");
close_session(fr_table, fr_session);
break;
}
fr_session->h_pos += len;
if (fr_session->h_pos == 4) {
#ifdef UWSGI_DEBUG
uwsgi_log("modifier1: %d pktsize: %d modifier2: %d\n", fr_session->uh.modifier1, fr_session->uh.pktsize, fr_session->uh.modifier2);
#endif
fr_session->status = FASTROUTER_STATUS_RECV_VARS;
}
break;
case FASTROUTER_STATUS_RECV_VARS:
len = recv(fr_session->fd, fr_session->buffer + fr_session->pos, fr_session->uh.pktsize - fr_session->pos, 0);
if (len <= 0) {
uwsgi_error("recv()");
close_session(fr_table, fr_session);
break;
}
fr_session->pos += len;
if (fr_session->pos == fr_session->uh.pktsize) {
if (uwsgi_hooked_parse(fr_session->buffer, fr_session->uh.pktsize, fr_get_hostname, (void *) fr_session)) {
close_session(fr_table, fr_session);
break;
}
if (fr_session->hostname_len == 0) {
close_session(fr_table, fr_session);
break;
}
#ifdef UWSGI_DEBUG
//uwsgi_log("requested domain %.*s\n", fr_session->hostname_len, fr_session->hostname);
#endif
if (ufr.use_cache) {
fr_session->instance_address = uwsgi_cache_get(fr_session->hostname, fr_session->hostname_len, &fr_session->instance_address_len);
char *cs_mod = uwsgi_str_contains(fr_session->instance_address, fr_session->instance_address_len, ',');
if (cs_mod) {
fr_session->modifier1 = uwsgi_str_num(cs_mod+1, (fr_session->instance_address_len - (cs_mod - fr_session->instance_address))-1);
fr_session->instance_address_len = (cs_mod - fr_session->instance_address);
}
}
else if (ufr.pattern) {
magic_table['s'] = uwsgi_concat2n(fr_session->hostname, fr_session->hostname_len, "", 0);
tmp_socket_name = magic_sub(ufr.pattern, ufr.pattern_len, &tmp_socket_name_len, magic_table);
free(magic_table['s']);
fr_session->instance_address_len = tmp_socket_name_len;
fr_session->instance_address = tmp_socket_name;
}
else if (ufr.subscription_server) {
fr_session->un = uwsgi_get_subscribe_node(&ufr.subscriptions, fr_session->hostname, fr_session->hostname_len, ufr.subscription_regexp);
if (fr_session->un && fr_session->un->len) {
fr_session->instance_address = fr_session->un->name;
fr_session->instance_address_len = fr_session->un->len;
fr_session->modifier1 = fr_session->un->modifier1;
}
}
else if (ufr.base) {
tmp_socket_name = uwsgi_concat2nn(ufr.base, ufr.base_len, fr_session->hostname, fr_session->hostname_len, &tmp_socket_name_len);
fr_session->instance_address_len = tmp_socket_name_len;
fr_session->instance_address = tmp_socket_name;
}
else if (ufr.code_string_code && ufr.code_string_function) {
if (uwsgi.p[ufr.code_string_modifier1]->code_string) {
fr_session->instance_address = uwsgi.p[ufr.code_string_modifier1]->code_string("uwsgi_fastrouter", ufr.code_string_code, ufr.code_string_function, fr_session->hostname, fr_session->hostname_len);
if (fr_session->instance_address) {
fr_session->instance_address_len = strlen(fr_session->instance_address);
char *cs_mod = uwsgi_str_contains(fr_session->instance_address, fr_session->instance_address_len, ',');
if (cs_mod) {
fr_session->modifier1 = uwsgi_str_num(cs_mod+1, (fr_session->instance_address_len - (cs_mod - fr_session->instance_address))-1);
fr_session->instance_address_len = (cs_mod - fr_session->instance_address);
}
}
}
}
// no address found
if (!fr_session->instance_address_len) {
close_session(fr_table, fr_session);
break;
}
fr_session->pass_fd = is_unix(fr_session->instance_address, fr_session->instance_address_len);
fr_session->instance_fd = uwsgi_connectn(fr_session->instance_address, fr_session->instance_address_len, 0, 1);
if (tmp_socket_name) free(tmp_socket_name);
if (fr_session->instance_fd < 0) {
/*
if (ufr.subscription_server) {
if (fr_session->un && fr_session->un->len > 0) {
uwsgi_log("[uwsgi-fastrouter] %.*s => marking %.*s as failed\n", (int) fr_session->hostname_len, fr_session->hostname, (int) fr_session->instance_address_len,fr_session->instance_address);
uwsgi_remove_subscribe_node(&ufr.subscriptions, fr_session->un);
if (ufr.subscriptions == NULL && ufr.cheap && !ufr.i_am_cheap) {
uwsgi_log("[uwsgi-fastrouter] no more nodes available. Going cheap...\n");
struct uwsgi_fastrouter_socket *ufr_sock = ufr.sockets;
while(ufr_sock) {
event_queue_del_fd(ufr.queue, ufr_sock->fd, event_queue_read());
ufr_sock = ufr_sock->next;
}
ufr.i_am_cheap = 1;
}
}
}
*/
fr_session->instance_failed = 1;
close_session(fr_table, fr_session);
break;
}
fr_session->status = FASTROUTER_STATUS_CONNECTING;
fr_table[fr_session->instance_fd] = fr_session;
event_queue_add_fd_write(ufr.queue, fr_session->instance_fd);
}
break;
case FASTROUTER_STATUS_CONNECTING:
if (interesting_fd == fr_session->instance_fd) {
if (getsockopt(fr_session->instance_fd, SOL_SOCKET, SO_ERROR, (void *) (&soopt), &solen) < 0) {
uwsgi_error("getsockopt()");
fr_session->instance_failed = 1;
close_session(fr_table, fr_session);
break;
}
if (soopt) {
uwsgi_log("unable to connect() to uwsgi instance: %s\n", strerror(soopt));
fr_session->instance_failed = 1;
close_session(fr_table, fr_session);
break;
}
fr_session->uh.modifier1 = fr_session->modifier1;
iov[0].iov_base = &fr_session->uh;
iov[0].iov_len = 4;
iov[1].iov_base = fr_session->buffer;
iov[1].iov_len = fr_session->uh.pktsize;
// increment node requests counter
if (fr_session->un)
fr_session->un->requests++;
// fd passing: PERFORMANCE EXTREME BOOST !!!
if (fr_session->pass_fd && !uwsgi.no_fd_passing) {
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = iov;
msg.msg_iovlen = 2;
msg.msg_flags = 0;
msg.msg_control = &msg_control;
msg.msg_controllen = sizeof (msg_control);
cmsg = CMSG_FIRSTHDR (&msg);
cmsg->cmsg_len = CMSG_LEN (sizeof (int));
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
memcpy(CMSG_DATA(cmsg), &fr_session->fd, sizeof(int));
if (sendmsg(fr_session->instance_fd, &msg, 0) < 0) {
uwsgi_error("sendmsg()");
}
close_session(fr_table, fr_session);
break;
}
if (writev(fr_session->instance_fd, iov, 2) < 0) {
uwsgi_error("writev()");
close_session(fr_table, fr_session);
break;
}
event_queue_fd_write_to_read(ufr.queue, fr_session->instance_fd);
fr_session->status = FASTROUTER_STATUS_RESPONSE;
}
break;
case FASTROUTER_STATUS_RESPONSE:
// data from instance
if (interesting_fd == fr_session->instance_fd) {
len = recv(fr_session->instance_fd, fr_session->buffer, 0xffff, 0);
if (len <= 0) {
if (len < 0) uwsgi_error("recv()");
close_session(fr_table, fr_session);
break;
}
len = send(fr_session->fd, fr_session->buffer, len, 0);
if (len <= 0) {
if (len < 0) uwsgi_error("send()");
close_session(fr_table, fr_session);
break;
}
// update transfer statistics
if (fr_session->un)
fr_session->un->transferred += len;
}
// body from client
else if (interesting_fd == fr_session->fd) {
//uwsgi_log("receiving body...\n");
len = recv(fr_session->fd, fr_session->buffer, 0xffff, 0);
if (len <= 0) {
if (len < 0) uwsgi_error("recv()");
close_session(fr_table, fr_session);
break;
}
len = send(fr_session->instance_fd, fr_session->buffer, len, 0);
if (len <= 0) {
if (len < 0) uwsgi_error("send()");
close_session(fr_table, fr_session);
break;
}
}
break;
// fallback to destroy !!!
default:
uwsgi_log("unknown event: closing session\n");
close_session(fr_table, fr_session);
break;
}
}
}
}
}
void uwsgi_corerouter_loop(int id, void *data) {
int i;
struct uwsgi_corerouter *ucr = (struct uwsgi_corerouter *) data;
ucr->cr_stats_server = -1;
ucr->cr_table = uwsgi_malloc(sizeof(struct corerouter_session *) * uwsgi.max_fd);
for (i = 0; i < (int) uwsgi.max_fd; i++) {
ucr->cr_table[i] = NULL;
}
ucr->i_am_cheap = ucr->cheap;
void *events = uwsgi_corerouter_setup_event_queue(ucr, id);
if (ucr->has_subscription_sockets)
event_queue_add_fd_read(ucr->queue, ushared->gateways[id].internal_subscription_pipe[1]);
if (!ucr->socket_timeout)
ucr->socket_timeout = 60;
if (!ucr->static_node_gracetime)
ucr->static_node_gracetime = 30;
int i_am_the_first = 1;
for(i=0;i<id;i++) {
if (!strcmp(ushared->gateways[i].name, ucr->name)) {
i_am_the_first = 0;
break;
}
}
if (ucr->stats_server && i_am_the_first) {
char *tcp_port = strchr(ucr->stats_server, ':');
if (tcp_port) {
// disable deferred accept for this socket
int current_defer_accept = uwsgi.no_defer_accept;
uwsgi.no_defer_accept = 1;
ucr->cr_stats_server = bind_to_tcp(ucr->stats_server, uwsgi.listen_queue, tcp_port);
uwsgi.no_defer_accept = current_defer_accept;
}
else {
ucr->cr_stats_server = bind_to_unix(ucr->stats_server, uwsgi.listen_queue, uwsgi.chmod_socket, uwsgi.abstract_socket);
}
event_queue_add_fd_read(ucr->queue, ucr->cr_stats_server);
uwsgi_log("*** %s stats server enabled on %s fd: %d ***\n", ucr->short_name, ucr->stats_server, ucr->cr_stats_server);
}
if (ucr->use_socket) {
ucr->to_socket = uwsgi_get_socket_by_num(ucr->socket_num);
if (ucr->to_socket) {
// fix socket name_len
if (ucr->to_socket->name_len == 0 && ucr->to_socket->name) {
ucr->to_socket->name_len = strlen(ucr->to_socket->name);
}
}
}
if (!ucr->pb_base_dir) {
ucr->pb_base_dir = getenv("TMPDIR");
if (!ucr->pb_base_dir)
ucr->pb_base_dir = "/tmp";
}
int nevents;
time_t delta;
struct uwsgi_rb_timer *min_timeout;
int new_connection;
if (ucr->pattern) {
init_magic_table(ucr->magic_table);
}
union uwsgi_sockaddr cr_addr;
socklen_t cr_addr_len = sizeof(struct sockaddr_un);
ucr->mapper = uwsgi_cr_map_use_void;
if (ucr->use_cache) {
ucr->cache = uwsgi_cache_by_name(ucr->use_cache);
if (!ucr->cache) {
uwsgi_log("!!! unable to find cache \"%s\" !!!\n", ucr->use_cache);
exit(1);
}
ucr->mapper = uwsgi_cr_map_use_cache;
}
else if (ucr->pattern) {
ucr->mapper = uwsgi_cr_map_use_pattern;
}
else if (ucr->has_subscription_sockets) {
ucr->mapper = uwsgi_cr_map_use_subscription;
if (uwsgi.subscription_dotsplit) {
ucr->mapper = uwsgi_cr_map_use_subscription_dotsplit;
}
}
else if (ucr->base) {
ucr->mapper = uwsgi_cr_map_use_base;
}
else if (ucr->code_string_code && ucr->code_string_function) {
ucr->mapper = uwsgi_cr_map_use_cs;
}
else if (ucr->to_socket) {
ucr->mapper = uwsgi_cr_map_use_to;
}
else if (ucr->static_nodes) {
ucr->mapper = uwsgi_cr_map_use_static_nodes;
}
ucr->timeouts = uwsgi_init_rb_timer();
for (;;) {
time_t now = uwsgi_now();
// set timeouts and harakiri
min_timeout = uwsgi_min_rb_timer(ucr->timeouts, NULL);
if (min_timeout == NULL) {
delta = -1;
}
else {
delta = min_timeout->value - now;
if (delta <= 0) {
corerouter_expire_timeouts(ucr, now);
delta = 0;
}
}
if (uwsgi.master_process && ucr->harakiri > 0) {
ushared->gateways_harakiri[id] = 0;
}
// wait for events
nevents = event_queue_wait_multi(ucr->queue, delta, events, ucr->nevents);
now = uwsgi_now();
if (uwsgi.master_process && ucr->harakiri > 0) {
ushared->gateways_harakiri[id] = now + ucr->harakiri;
}
if (nevents == 0) {
corerouter_expire_timeouts(ucr, now);
}
for (i = 0; i < nevents; i++) {
// get the interesting fd
ucr->interesting_fd = event_queue_interesting_fd(events, i);
// something bad happened
if (ucr->interesting_fd < 0) continue;
// check if the ucr->interesting_fd matches a gateway socket
struct uwsgi_gateway_socket *ugs = uwsgi.gateway_sockets;
int taken = 0;
while (ugs) {
if (ugs->gateway == &ushared->gateways[id] && ucr->interesting_fd == ugs->fd) {
if (!ugs->subscription) {
#if defined(__linux__) && defined(SOCK_NONBLOCK) && !defined(OBSOLETE_LINUX_KERNEL)
new_connection = accept4(ucr->interesting_fd, (struct sockaddr *) &cr_addr, &cr_addr_len, SOCK_NONBLOCK);
if (new_connection < 0) {
taken = 1;
break;
}
#else
new_connection = accept(ucr->interesting_fd, (struct sockaddr *) &cr_addr, &cr_addr_len);
if (new_connection < 0) {
taken = 1;
break;
}
// set socket in non-blocking mode, on non-linux platforms, clients get the server mode
#ifdef __linux__
uwsgi_socket_nb(new_connection);
#endif
#endif
struct corerouter_session *cr = corerouter_alloc_session(ucr, ugs, new_connection, (struct sockaddr *) &cr_addr, cr_addr_len);
//something wrong in the allocation
if (!cr) break;
}
else if (ugs->subscription) {
uwsgi_corerouter_manage_subscription(ucr, id, ugs);
}
taken = 1;
break;
}
ugs = ugs->next;
}
if (taken) {
continue;
}
// manage internal subscription
if (ucr->interesting_fd == ushared->gateways[id].internal_subscription_pipe[1]) {
uwsgi_corerouter_manage_internal_subscription(ucr, ucr->interesting_fd);
}
// manage a stats request
else if (ucr->interesting_fd == ucr->cr_stats_server) {
corerouter_send_stats(ucr);
}
else {
struct corerouter_peer *peer = ucr->cr_table[ucr->interesting_fd];
// something is going wrong...
if (peer == NULL)
continue;
// on error, destroy the session
if (event_queue_interesting_fd_has_error(events, i)) {
peer->failed = 1;
corerouter_close_peer(ucr, peer);
continue;
}
// set timeout (in main_peer too)
peer->timeout = corerouter_reset_timeout_fast(ucr, peer, now);
peer->session->main_peer->timeout = corerouter_reset_timeout_fast(ucr, peer->session->main_peer, now);
ssize_t (*hook)(struct corerouter_peer *) = NULL;
// call event hook
if (event_queue_interesting_fd_is_read(events, i)) {
hook = peer->hook_read;
}
else if (event_queue_interesting_fd_is_write(events, i)) {
hook = peer->hook_write;
}
if (!hook) continue;
// reset errno (as we use it for internal signalling)
errno = 0;
ssize_t ret = hook(peer);
// connection closed
if (ret == 0) {
corerouter_close_peer(ucr, peer);
continue;
}
else if (ret < 0) {
if (errno == EINPROGRESS) continue;
// remove keepalive on error
peer->session->can_keepalive = 0;
corerouter_close_peer(ucr, peer);
continue;
}
}
}
}
}
void *async_loop(void *arg1) {
struct uwsgi_async_fd *tmp_uaf;
int interesting_fd, i;
struct uwsgi_rb_timer *min_timeout;
int timeout;
int is_a_new_connection;
int proto_parser_status;
time_t now, last_now = 0;
static struct uwsgi_async_request *current_request = NULL, *next_async_request = NULL;
void *events = event_queue_alloc(64);
struct uwsgi_socket *uwsgi_sock;
uwsgi.async_runqueue = NULL;
uwsgi.async_runqueue_cnt = 0;
if (uwsgi.signal_socket > -1) {
event_queue_add_fd_read(uwsgi.async_queue, uwsgi.signal_socket);
event_queue_add_fd_read(uwsgi.async_queue, uwsgi.my_signal_socket);
}
// set a default request manager
if (!uwsgi.schedule_to_req) uwsgi.schedule_to_req = async_schedule_to_req;
while (uwsgi.workers[uwsgi.mywid].manage_next_request) {
if (uwsgi.async_runqueue_cnt) {
timeout = 0;
}
else {
min_timeout = uwsgi_min_rb_timer(uwsgi.rb_async_timeouts);
if (uwsgi.async_runqueue_cnt) {
timeout = 0;
}
if (min_timeout) {
timeout = min_timeout->key - time(NULL);
if (timeout <= 0) {
async_expire_timeouts();
timeout = 0;
}
}
else {
timeout = -1;
}
}
uwsgi.async_nevents = event_queue_wait_multi(uwsgi.async_queue, timeout, events, 64);
// timeout ???
if (uwsgi.async_nevents == 0) {
async_expire_timeouts();
}
for(i=0;i<uwsgi.async_nevents;i++) {
// manage events
interesting_fd = event_queue_interesting_fd(events, i);
if (uwsgi.signal_socket > -1 && (interesting_fd == uwsgi.signal_socket || interesting_fd == uwsgi.my_signal_socket)) {
uwsgi_receive_signal(interesting_fd, "worker", uwsgi.mywid);
continue;
}
is_a_new_connection = 0;
// new request coming in ?
uwsgi_sock = uwsgi.sockets;
while(uwsgi_sock) {
if (interesting_fd == uwsgi_sock->fd) {
is_a_new_connection = 1;
uwsgi.wsgi_req = find_first_available_wsgi_req();
if (uwsgi.wsgi_req == NULL) {
now = time(NULL);
if (now > last_now) {
uwsgi_log("async queue is full !!!\n");
last_now = now;
}
break;
}
wsgi_req_setup(uwsgi.wsgi_req, uwsgi.wsgi_req->async_id, uwsgi_sock );
if (wsgi_req_simple_accept(uwsgi.wsgi_req, interesting_fd)) {
#ifdef UWSGI_EVENT_USE_PORT
event_queue_add_fd_read(uwsgi.async_queue, interesting_fd);
#endif
uwsgi.async_queue_unused_ptr++;
uwsgi.async_queue_unused[uwsgi.async_queue_unused_ptr] = uwsgi.wsgi_req;
break;
}
#ifdef UWSGI_EVENT_USE_PORT
event_queue_add_fd_read(uwsgi.async_queue, interesting_fd);
#endif
// on linux we do not need to reset the socket to blocking state
#ifndef __linux__
/* re-set blocking socket */
int arg = uwsgi_sock->arg;
arg &= (~O_NONBLOCK);
if (fcntl(uwsgi.wsgi_req->poll.fd, F_SETFL, arg) < 0) {
uwsgi_error("fcntl()");
uwsgi.async_queue_unused_ptr++;
uwsgi.async_queue_unused[uwsgi.async_queue_unused_ptr] = uwsgi.wsgi_req;
break;
}
#endif
if (wsgi_req_async_recv(uwsgi.wsgi_req)) {
uwsgi.async_queue_unused_ptr++;
uwsgi.async_queue_unused[uwsgi.async_queue_unused_ptr] = uwsgi.wsgi_req;
break;
}
if (uwsgi.wsgi_req->do_not_add_to_async_queue) {
runqueue_push(uwsgi.wsgi_req);
}
break;
}
uwsgi_sock = uwsgi_sock->next;
}
if (!is_a_new_connection) {
// proto event
uwsgi.wsgi_req = find_wsgi_req_proto_by_fd(interesting_fd);
if (uwsgi.wsgi_req) {
proto_parser_status = uwsgi.wsgi_req->socket->proto(uwsgi.wsgi_req);
// reset timeout
rb_erase(&uwsgi.wsgi_req->async_timeout->rbt, uwsgi.rb_async_timeouts);
free(uwsgi.wsgi_req->async_timeout);
uwsgi.wsgi_req->async_timeout = NULL;
// parsing complete
if (!proto_parser_status) {
// remove fd from event poll and fd proto table
#ifndef UWSGI_EVENT_USE_PORT
event_queue_del_fd(uwsgi.async_queue, interesting_fd, event_queue_read());
#endif
uwsgi.async_proto_fd_table[interesting_fd] = NULL;
// put request in the runqueue
runqueue_push(uwsgi.wsgi_req);
continue;
}
else if (proto_parser_status < 0) {
if (proto_parser_status == -1)
uwsgi_log("error parsing request\n");
uwsgi.async_proto_fd_table[interesting_fd] = NULL;
close(interesting_fd);
continue;
}
// re-add timer
async_add_timeout(uwsgi.wsgi_req, uwsgi.shared->options[UWSGI_OPTION_SOCKET_TIMEOUT]);
continue;
}
// app event
uwsgi.wsgi_req = find_wsgi_req_by_fd(interesting_fd);
// unknown fd, remove it (for safety)
if (uwsgi.wsgi_req == NULL) {
close(interesting_fd);
continue;
}
// remove all the fd monitors and timeout
while(uwsgi.wsgi_req->waiting_fds) {
#ifndef UWSGI_EVENT_USE_PORT
event_queue_del_fd(uwsgi.async_queue, uwsgi.wsgi_req->waiting_fds->fd, uwsgi.wsgi_req->waiting_fds->event);
#endif
tmp_uaf = uwsgi.wsgi_req->waiting_fds;
uwsgi.async_waiting_fd_table[tmp_uaf->fd] = NULL;
uwsgi.wsgi_req->waiting_fds = tmp_uaf->next;
free(tmp_uaf);
}
uwsgi.wsgi_req->waiting_fds = NULL;
if (uwsgi.wsgi_req->async_timeout) {
rb_erase(&uwsgi.wsgi_req->async_timeout->rbt, uwsgi.rb_async_timeouts);
free(uwsgi.wsgi_req->async_timeout);
uwsgi.wsgi_req->async_timeout = NULL;
}
uwsgi.wsgi_req->async_ready_fd = 1;
uwsgi.wsgi_req->async_last_ready_fd = interesting_fd;
// put the request in the runqueue again
runqueue_push(uwsgi.wsgi_req);
}
}
// event queue managed, give cpu to runqueue
if (!current_request)
current_request = uwsgi.async_runqueue;
if (uwsgi.async_runqueue_cnt) {
uwsgi.wsgi_req = current_request->wsgi_req;
uwsgi.schedule_to_req();
uwsgi.wsgi_req->switches++;
next_async_request = current_request->next;
// request ended ?
if (uwsgi.wsgi_req->async_status <= UWSGI_OK) {
// remove all the monitored fds and timeout
while(uwsgi.wsgi_req->waiting_fds) {
#ifndef UWSGI_EVENT_USE_PORT
event_queue_del_fd(uwsgi.async_queue, uwsgi.wsgi_req->waiting_fds->fd, uwsgi.wsgi_req->waiting_fds->event);
#endif
tmp_uaf = uwsgi.wsgi_req->waiting_fds;
uwsgi.async_waiting_fd_table[tmp_uaf->fd] = NULL;
uwsgi.wsgi_req->waiting_fds = tmp_uaf->next;
free(tmp_uaf);
}
uwsgi.wsgi_req->waiting_fds = NULL;
if (uwsgi.wsgi_req->async_timeout) {
rb_erase(&uwsgi.wsgi_req->async_timeout->rbt, uwsgi.rb_async_timeouts);
free(uwsgi.wsgi_req->async_timeout);
uwsgi.wsgi_req->async_timeout = NULL;
}
// remove from the list
runqueue_remove(current_request);
uwsgi_close_request(uwsgi.wsgi_req);
// push wsgi_request in the unused stack
uwsgi.async_queue_unused_ptr++;
uwsgi.async_queue_unused[uwsgi.async_queue_unused_ptr] = uwsgi.wsgi_req;
}
else if (uwsgi.wsgi_req->waiting_fds || uwsgi.wsgi_req->async_timeout) {
// remove this request from suspended list
runqueue_remove(current_request);
}
current_request = next_async_request;
}
}
return NULL;
}
void uwsgi_corerouter_loop(int id, void *data) {
int i;
struct uwsgi_corerouter *ucr = (struct uwsgi_corerouter *) data;
ucr->cr_stats_server = -1;
ucr->cr_table = uwsgi_malloc(sizeof(struct corerouter_session *) * uwsgi.max_fd);
for (i = 0; i < (int) uwsgi.max_fd; i++) {
ucr->cr_table[i] = NULL;
}
ucr->i_am_cheap = ucr->cheap;
void *events = uwsgi_corerouter_setup_event_queue(ucr, id);
if (ucr->has_subscription_sockets)
event_queue_add_fd_read(ucr->queue, ushared->gateways[id].internal_subscription_pipe[1]);
if (!ucr->socket_timeout)
ucr->socket_timeout = 30;
if (!ucr->static_node_gracetime)
ucr->static_node_gracetime = 30;
int i_am_the_first = 1;
for(i=0;i<id;i++) {
if (!strcmp(ushared->gateways[i].name, ucr->name)) {
i_am_the_first = 0;
break;
}
}
if (ucr->stats_server && i_am_the_first) {
char *tcp_port = strchr(ucr->stats_server, ':');
if (tcp_port) {
// disable deferred accept for this socket
int current_defer_accept = uwsgi.no_defer_accept;
uwsgi.no_defer_accept = 1;
ucr->cr_stats_server = bind_to_tcp(ucr->stats_server, uwsgi.listen_queue, tcp_port);
uwsgi.no_defer_accept = current_defer_accept;
}
else {
ucr->cr_stats_server = bind_to_unix(ucr->stats_server, uwsgi.listen_queue, uwsgi.chmod_socket, uwsgi.abstract_socket);
}
event_queue_add_fd_read(ucr->queue, ucr->cr_stats_server);
uwsgi_log("*** %s stats server enabled on %s fd: %d ***\n", ucr->short_name, ucr->stats_server, ucr->cr_stats_server);
}
if (ucr->use_socket) {
ucr->to_socket = uwsgi_get_socket_by_num(ucr->socket_num);
if (ucr->to_socket) {
// fix socket name_len
if (ucr->to_socket->name_len == 0 && ucr->to_socket->name) {
ucr->to_socket->name_len = strlen(ucr->to_socket->name);
}
}
}
if (!ucr->pb_base_dir) {
ucr->pb_base_dir = getenv("TMPDIR");
if (!ucr->pb_base_dir)
ucr->pb_base_dir = "/tmp";
}
int nevents;
time_t delta;
struct uwsgi_rb_timer *min_timeout;
int interesting_fd;
int new_connection;
if (ucr->pattern) {
init_magic_table(ucr->magic_table);
}
union uwsgi_sockaddr cr_addr;
socklen_t cr_addr_len = sizeof(struct sockaddr_un);
struct corerouter_session *cr_session;
ucr->mapper = uwsgi_cr_map_use_void;
if (ucr->use_cache) {
ucr->mapper = uwsgi_cr_map_use_cache;
}
else if (ucr->pattern) {
ucr->mapper = uwsgi_cr_map_use_pattern;
}
else if (ucr->has_subscription_sockets) {
ucr->mapper = uwsgi_cr_map_use_subscription;
}
else if (ucr->base) {
ucr->mapper = uwsgi_cr_map_use_base;
}
else if (ucr->code_string_code && ucr->code_string_function) {
ucr->mapper = uwsgi_cr_map_use_cs;
}
else if (ucr->to_socket) {
ucr->mapper = uwsgi_cr_map_use_to;
}
else if (ucr->static_nodes) {
ucr->mapper = uwsgi_cr_map_use_static_nodes;
}
else if (ucr->use_cluster) {
ucr->mapper = uwsgi_cr_map_use_cluster;
}
ucr->timeouts = uwsgi_init_rb_timer();
for (;;) {
min_timeout = uwsgi_min_rb_timer(ucr->timeouts);
if (min_timeout == NULL) {
delta = -1;
}
else {
delta = min_timeout->key - time(NULL);
if (delta <= 0) {
corerouter_expire_timeouts(ucr);
delta = 0;
}
}
if (uwsgi.master_process && ucr->harakiri > 0) {
ushared->gateways_harakiri[id] = 0;
}
nevents = event_queue_wait_multi(ucr->queue, delta, events, ucr->nevents);
if (uwsgi.master_process && ucr->harakiri > 0) {
ushared->gateways_harakiri[id] = time(NULL) + ucr->harakiri;
}
if (nevents == 0) {
corerouter_expire_timeouts(ucr);
}
for (i = 0; i < nevents; i++) {
interesting_fd = event_queue_interesting_fd(events, i);
struct uwsgi_gateway_socket *ugs = uwsgi.gateway_sockets;
int taken = 0;
while (ugs) {
if (ugs->gateway == &ushared->gateways[id] && interesting_fd == ugs->fd) {
if (!ugs->subscription) {
new_connection = accept(interesting_fd, (struct sockaddr *) &cr_addr, &cr_addr_len);
#ifdef UWSGI_EVENT_USE_PORT
event_queue_add_fd_read(ucr->queue, interesting_fd);
#endif
if (new_connection < 0) {
taken = 1;
break;
}
// set socket blocking mode, on non-linux platforms, clients get the server mode
#ifndef __linux__
if (!ugs->nb) {
uwsgi_socket_b(new_connection);
}
#else
if (ugs->nb) {
uwsgi_socket_nb(new_connection);
}
#endif
corerouter_alloc_session(ucr, ugs, new_connection, (struct sockaddr *) &cr_addr, cr_addr_len);
}
else if (ugs->subscription) {
uwsgi_corerouter_manage_subscription(ucr, id, ugs);
}
taken = 1;
break;
}
ugs = ugs->next;
}
if (taken) {
continue;
}
if (interesting_fd == ushared->gateways[id].internal_subscription_pipe[1]) {
uwsgi_corerouter_manage_internal_subscription(ucr, interesting_fd);
}
else if (interesting_fd == ucr->cr_stats_server) {
corerouter_send_stats(ucr);
}
else {
cr_session = ucr->cr_table[interesting_fd];
// something is going wrong...
if (cr_session == NULL)
continue;
if (event_queue_interesting_fd_has_error(events, i)) {
corerouter_close_session(ucr, cr_session);
continue;
}
cr_session->timeout = corerouter_reset_timeout(ucr, cr_session);
// mplementation specific cycle;
ucr->switch_events(ucr, cr_session, interesting_fd);
}
}
}
}
void async_loop() {
if (uwsgi.async < 2) {
uwsgi_log("the async loop engine requires async mode (--async <n>)\n");
exit(1);
}
struct uwsgi_async_fd *tmp_uaf;
int interesting_fd, i;
struct uwsgi_rb_timer *min_timeout;
int timeout;
int is_a_new_connection;
int proto_parser_status;
uint64_t now;
static struct uwsgi_async_request *current_request = NULL, *next_async_request = NULL;
void *events = event_queue_alloc(64);
struct uwsgi_socket *uwsgi_sock;
uwsgi.async_runqueue = NULL;
uwsgi.async_runqueue_cnt = 0;
uwsgi.wait_write_hook = async_wait_fd_write;
uwsgi.wait_read_hook = async_wait_fd_read;
if (uwsgi.signal_socket > -1) {
event_queue_add_fd_read(uwsgi.async_queue, uwsgi.signal_socket);
event_queue_add_fd_read(uwsgi.async_queue, uwsgi.my_signal_socket);
}
// set a default request manager
if (!uwsgi.schedule_to_req)
uwsgi.schedule_to_req = async_schedule_to_req;
if (!uwsgi.schedule_to_main) {
uwsgi_log("*** WARNING *** async mode without coroutine/greenthread engine loaded !!!\n");
}
while (uwsgi.workers[uwsgi.mywid].manage_next_request) {
now = (uint64_t) uwsgi_now();
if (uwsgi.async_runqueue_cnt) {
timeout = 0;
}
else {
min_timeout = uwsgi_min_rb_timer(uwsgi.rb_async_timeouts, NULL);
if (min_timeout) {
timeout = min_timeout->value - now;
if (timeout <= 0) {
async_expire_timeouts(now);
timeout = 0;
}
}
else {
timeout = -1;
}
}
uwsgi.async_nevents = event_queue_wait_multi(uwsgi.async_queue, timeout, events, 64);
now = (uint64_t) uwsgi_now();
// timeout ???
if (uwsgi.async_nevents == 0) {
async_expire_timeouts(now);
}
for (i = 0; i < uwsgi.async_nevents; i++) {
// manage events
interesting_fd = event_queue_interesting_fd(events, i);
if (uwsgi.signal_socket > -1 && (interesting_fd == uwsgi.signal_socket || interesting_fd == uwsgi.my_signal_socket)) {
uwsgi_receive_signal(interesting_fd, "worker", uwsgi.mywid);
continue;
}
is_a_new_connection = 0;
// new request coming in ?
uwsgi_sock = uwsgi.sockets;
while (uwsgi_sock) {
if (interesting_fd == uwsgi_sock->fd) {
is_a_new_connection = 1;
uwsgi.wsgi_req = find_first_available_wsgi_req();
if (uwsgi.wsgi_req == NULL) {
uwsgi_async_queue_is_full((time_t)now);
break;
}
wsgi_req_setup(uwsgi.wsgi_req, uwsgi.wsgi_req->async_id, uwsgi_sock);
if (wsgi_req_simple_accept(uwsgi.wsgi_req, interesting_fd)) {
uwsgi.async_queue_unused_ptr++;
uwsgi.async_queue_unused[uwsgi.async_queue_unused_ptr] = uwsgi.wsgi_req;
break;
}
if (wsgi_req_async_recv(uwsgi.wsgi_req)) {
uwsgi.async_queue_unused_ptr++;
uwsgi.async_queue_unused[uwsgi.async_queue_unused_ptr] = uwsgi.wsgi_req;
break;
}
if (uwsgi.wsgi_req->do_not_add_to_async_queue) {
runqueue_push(uwsgi.wsgi_req);
}
break;
}
uwsgi_sock = uwsgi_sock->next;
}
if (!is_a_new_connection) {
// proto event
uwsgi.wsgi_req = find_wsgi_req_proto_by_fd(interesting_fd);
if (uwsgi.wsgi_req) {
proto_parser_status = uwsgi.wsgi_req->socket->proto(uwsgi.wsgi_req);
// reset timeout
uwsgi_del_rb_timer(uwsgi.rb_async_timeouts, uwsgi.wsgi_req->async_timeout);
free(uwsgi.wsgi_req->async_timeout);
uwsgi.wsgi_req->async_timeout = NULL;
// parsing complete
if (!proto_parser_status) {
// remove fd from event poll and fd proto table
uwsgi.async_proto_fd_table[interesting_fd] = NULL;
event_queue_del_fd(uwsgi.async_queue, interesting_fd, event_queue_read());
// put request in the runqueue
runqueue_push(uwsgi.wsgi_req);
continue;
}
else if (proto_parser_status < 0) {
if (proto_parser_status == -1)
uwsgi_log("error parsing request\n");
uwsgi.async_proto_fd_table[interesting_fd] = NULL;
close(interesting_fd);
continue;
}
// re-add timer
async_add_timeout(uwsgi.wsgi_req, uwsgi.shared->options[UWSGI_OPTION_SOCKET_TIMEOUT]);
continue;
}
// app event
uwsgi.wsgi_req = find_wsgi_req_by_fd(interesting_fd);
// unknown fd, remove it (for safety)
if (uwsgi.wsgi_req == NULL) {
close(interesting_fd);
continue;
}
// remove all the fd monitors and timeout
while (uwsgi.wsgi_req->waiting_fds) {
tmp_uaf = uwsgi.wsgi_req->waiting_fds;
uwsgi.async_waiting_fd_table[tmp_uaf->fd] = NULL;
event_queue_del_fd(uwsgi.async_queue, tmp_uaf->fd, tmp_uaf->event);
uwsgi.wsgi_req->waiting_fds = tmp_uaf->next;
free(tmp_uaf);
}
uwsgi.wsgi_req->waiting_fds = NULL;
if (uwsgi.wsgi_req->async_timeout) {
uwsgi_del_rb_timer(uwsgi.rb_async_timeouts, uwsgi.wsgi_req->async_timeout);
free(uwsgi.wsgi_req->async_timeout);
uwsgi.wsgi_req->async_timeout = NULL;
}
uwsgi.wsgi_req->async_ready_fd = 1;
uwsgi.wsgi_req->async_last_ready_fd = interesting_fd;
// put the request in the runqueue again
runqueue_push(uwsgi.wsgi_req);
// avoid managing other enqueued events...
break;
}
}
// event queue managed, give cpu to runqueue
if (!current_request)
current_request = uwsgi.async_runqueue;
if (uwsgi.async_runqueue_cnt) {
uwsgi.wsgi_req = current_request->wsgi_req;
uwsgi.schedule_to_req();
uwsgi.wsgi_req->switches++;
next_async_request = current_request->next;
// request ended ?
if (uwsgi.wsgi_req->async_status <= UWSGI_OK) {
// remove all the monitored fds and timeout
while (uwsgi.wsgi_req->waiting_fds) {
tmp_uaf = uwsgi.wsgi_req->waiting_fds;
uwsgi.async_waiting_fd_table[tmp_uaf->fd] = NULL;
event_queue_del_fd(uwsgi.async_queue, tmp_uaf->fd, tmp_uaf->event);
uwsgi.wsgi_req->waiting_fds = tmp_uaf->next;
free(tmp_uaf);
}
uwsgi.wsgi_req->waiting_fds = NULL;
if (uwsgi.wsgi_req->async_timeout) {
uwsgi_del_rb_timer(uwsgi.rb_async_timeouts, uwsgi.wsgi_req->async_timeout);
free(uwsgi.wsgi_req->async_timeout);
uwsgi.wsgi_req->async_timeout = NULL;
}
// remove from the list
runqueue_remove(current_request);
uwsgi_close_request(uwsgi.wsgi_req);
// push wsgi_request in the unused stack
uwsgi.async_queue_unused_ptr++;
uwsgi.async_queue_unused[uwsgi.async_queue_unused_ptr] = uwsgi.wsgi_req;
}
else if (uwsgi.wsgi_req->waiting_fds || uwsgi.wsgi_req->async_timeout) {
// remove this request from suspended list
runqueue_remove(current_request);
}
current_request = next_async_request;
}
}
}
