| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| |
| |
| #define DEFAULT_CONNECTIONS 512 |
| |
| |
| extern ngx_module_t ngx_kqueue_module; |
| extern ngx_module_t ngx_eventport_module; |
| extern ngx_module_t ngx_devpoll_module; |
| extern ngx_module_t ngx_epoll_module; |
| extern ngx_module_t ngx_select_module; |
| |
| |
| static char *ngx_event_init_conf(ngx_cycle_t *cycle, void *conf); |
| static ngx_int_t ngx_event_module_init(ngx_cycle_t *cycle); |
| static ngx_int_t ngx_event_process_init(ngx_cycle_t *cycle); |
| static char *ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); |
| |
| static char *ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf); |
| static char *ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); |
| static char *ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf); |
| |
| static void *ngx_event_core_create_conf(ngx_cycle_t *cycle); |
| static char *ngx_event_core_init_conf(ngx_cycle_t *cycle, void *conf); |
| |
| |
| static ngx_uint_t ngx_timer_resolution; |
| sig_atomic_t ngx_event_timer_alarm; |
| |
| static ngx_uint_t ngx_event_max_module; |
| |
| ngx_uint_t ngx_event_flags; |
| ngx_event_actions_t ngx_event_actions; |
| |
| |
| static ngx_atomic_t connection_counter = 1; |
| ngx_atomic_t *ngx_connection_counter = &connection_counter; |
| |
| |
| ngx_atomic_t *ngx_accept_mutex_ptr; |
| ngx_shmtx_t ngx_accept_mutex; |
| ngx_uint_t ngx_use_accept_mutex; |
| ngx_uint_t ngx_accept_events; |
| ngx_uint_t ngx_accept_mutex_held; |
| ngx_msec_t ngx_accept_mutex_delay; |
| ngx_int_t ngx_accept_disabled; |
| |
| |
| #if (NGX_STAT_STUB) |
| |
| static ngx_atomic_t ngx_stat_accepted0; |
| ngx_atomic_t *ngx_stat_accepted = &ngx_stat_accepted0; |
| static ngx_atomic_t ngx_stat_handled0; |
| ngx_atomic_t *ngx_stat_handled = &ngx_stat_handled0; |
| static ngx_atomic_t ngx_stat_requests0; |
| ngx_atomic_t *ngx_stat_requests = &ngx_stat_requests0; |
| static ngx_atomic_t ngx_stat_active0; |
| ngx_atomic_t *ngx_stat_active = &ngx_stat_active0; |
| static ngx_atomic_t ngx_stat_reading0; |
| ngx_atomic_t *ngx_stat_reading = &ngx_stat_reading0; |
| static ngx_atomic_t ngx_stat_writing0; |
| ngx_atomic_t *ngx_stat_writing = &ngx_stat_writing0; |
| static ngx_atomic_t ngx_stat_waiting0; |
| ngx_atomic_t *ngx_stat_waiting = &ngx_stat_waiting0; |
| |
| #endif |
| |
| |
| |
| static ngx_command_t ngx_events_commands[] = { |
| |
| { ngx_string("events"), |
| NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS, |
| ngx_events_block, |
| 0, |
| 0, |
| NULL }, |
| |
| ngx_null_command |
| }; |
| |
| |
| static ngx_core_module_t ngx_events_module_ctx = { |
| ngx_string("events"), |
| NULL, |
| ngx_event_init_conf |
| }; |
| |
| |
| ngx_module_t ngx_events_module = { |
| NGX_MODULE_V1, |
| &ngx_events_module_ctx, /* module context */ |
| ngx_events_commands, /* module directives */ |
| NGX_CORE_MODULE, /* module type */ |
| NULL, /* init master */ |
| NULL, /* init module */ |
| NULL, /* init process */ |
| NULL, /* init thread */ |
| NULL, /* exit thread */ |
| NULL, /* exit process */ |
| NULL, /* exit master */ |
| NGX_MODULE_V1_PADDING |
| }; |
| |
| |
| static ngx_str_t event_core_name = ngx_string("event_core"); |
| |
| |
| static ngx_command_t ngx_event_core_commands[] = { |
| |
| { ngx_string("worker_connections"), |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, |
| ngx_event_connections, |
| 0, |
| 0, |
| NULL }, |
| |
| { ngx_string("use"), |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, |
| ngx_event_use, |
| 0, |
| 0, |
| NULL }, |
| |
| { ngx_string("multi_accept"), |
| NGX_EVENT_CONF|NGX_CONF_FLAG, |
| ngx_conf_set_flag_slot, |
| 0, |
| offsetof(ngx_event_conf_t, multi_accept), |
| NULL }, |
| |
| { ngx_string("accept_mutex"), |
| NGX_EVENT_CONF|NGX_CONF_FLAG, |
| ngx_conf_set_flag_slot, |
| 0, |
| offsetof(ngx_event_conf_t, accept_mutex), |
| NULL }, |
| |
| { ngx_string("accept_mutex_delay"), |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_msec_slot, |
| 0, |
| offsetof(ngx_event_conf_t, accept_mutex_delay), |
| NULL }, |
| |
| { ngx_string("debug_connection"), |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, |
| ngx_event_debug_connection, |
| 0, |
| 0, |
| NULL }, |
| |
| ngx_null_command |
| }; |
| |
| |
| static ngx_event_module_t ngx_event_core_module_ctx = { |
| &event_core_name, |
| ngx_event_core_create_conf, /* create configuration */ |
| ngx_event_core_init_conf, /* init configuration */ |
| |
| { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL } |
| }; |
| |
| |
| ngx_module_t ngx_event_core_module = { |
| NGX_MODULE_V1, |
| &ngx_event_core_module_ctx, /* module context */ |
| ngx_event_core_commands, /* module directives */ |
| NGX_EVENT_MODULE, /* module type */ |
| NULL, /* init master */ |
| ngx_event_module_init, /* init module */ |
| ngx_event_process_init, /* init process */ |
| NULL, /* init thread */ |
| NULL, /* exit thread */ |
| NULL, /* exit process */ |
| NULL, /* exit master */ |
| NGX_MODULE_V1_PADDING |
| }; |
| |
| |
| void |
| ngx_process_events_and_timers(ngx_cycle_t *cycle) |
| { |
| ngx_uint_t flags; |
| ngx_msec_t timer, delta; |
| |
| if (ngx_timer_resolution) { |
| timer = NGX_TIMER_INFINITE; |
| flags = 0; |
| |
| } else { |
| timer = ngx_event_find_timer(); |
| flags = NGX_UPDATE_TIME; |
| |
| #if (NGX_WIN32) |
| |
| /* handle signals from master in case of network inactivity */ |
| |
| if (timer == NGX_TIMER_INFINITE || timer > 500) { |
| timer = 500; |
| } |
| |
| #endif |
| } |
| |
| if (ngx_use_accept_mutex) { |
| if (ngx_accept_disabled > 0) { |
| ngx_accept_disabled--; |
| |
| } else { |
| if (ngx_trylock_accept_mutex(cycle) == NGX_ERROR) { |
| return; |
| } |
| |
| if (ngx_accept_mutex_held) { |
| flags |= NGX_POST_EVENTS; |
| |
| } else { |
| if (timer == NGX_TIMER_INFINITE |
| || timer > ngx_accept_mutex_delay) |
| { |
| timer = ngx_accept_mutex_delay; |
| } |
| } |
| } |
| } |
| |
| if (!ngx_queue_empty(&ngx_posted_next_events)) { |
| ngx_event_move_posted_next(cycle); |
| timer = 0; |
| } |
| |
| delta = ngx_current_msec; |
| |
| (void) ngx_process_events(cycle, timer, flags); |
| |
| delta = ngx_current_msec - delta; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "timer delta: %M", delta); |
| |
| ngx_event_process_posted(cycle, &ngx_posted_accept_events); |
| |
| if (ngx_accept_mutex_held) { |
| ngx_shmtx_unlock(&ngx_accept_mutex); |
| } |
| |
| ngx_event_expire_timers(); |
| |
| ngx_event_process_posted(cycle, &ngx_posted_events); |
| } |
| |
| |
| ngx_int_t |
| ngx_handle_read_event(ngx_event_t *rev, ngx_uint_t flags) |
| { |
| if (ngx_event_flags & NGX_USE_CLEAR_EVENT) { |
| |
| /* kqueue, epoll */ |
| |
| if (!rev->active && !rev->ready) { |
| if (ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| } |
| |
| return NGX_OK; |
| |
| } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { |
| |
| /* select, poll, /dev/poll */ |
| |
| if (!rev->active && !rev->ready) { |
| if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| if (rev->active && (rev->ready || (flags & NGX_CLOSE_EVENT))) { |
| if (ngx_del_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT | flags) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| } else if (ngx_event_flags & NGX_USE_EVENTPORT_EVENT) { |
| |
| /* event ports */ |
| |
| if (!rev->active && !rev->ready) { |
| if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| if (rev->oneshot && rev->ready) { |
| if (ngx_del_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| } |
| |
| /* iocp */ |
| |
| return NGX_OK; |
| } |
| |
| |
| ngx_int_t |
| ngx_handle_write_event(ngx_event_t *wev, size_t lowat) |
| { |
| ngx_connection_t *c; |
| |
| if (lowat) { |
| c = wev->data; |
| |
| if (ngx_send_lowat(c, lowat) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| } |
| |
| if (ngx_event_flags & NGX_USE_CLEAR_EVENT) { |
| |
| /* kqueue, epoll */ |
| |
| if (!wev->active && !wev->ready) { |
| if (ngx_add_event(wev, NGX_WRITE_EVENT, |
| NGX_CLEAR_EVENT | (lowat ? NGX_LOWAT_EVENT : 0)) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| } |
| |
| return NGX_OK; |
| |
| } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { |
| |
| /* select, poll, /dev/poll */ |
| |
| if (!wev->active && !wev->ready) { |
| if (ngx_add_event(wev, NGX_WRITE_EVENT, NGX_LEVEL_EVENT) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| if (wev->active && wev->ready) { |
| if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_LEVEL_EVENT) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| } else if (ngx_event_flags & NGX_USE_EVENTPORT_EVENT) { |
| |
| /* event ports */ |
| |
| if (!wev->active && !wev->ready) { |
| if (ngx_add_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| if (wev->oneshot && wev->ready) { |
| if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| } |
| |
| /* iocp */ |
| |
| return NGX_OK; |
| } |
| |
| |
| static char * |
| ngx_event_init_conf(ngx_cycle_t *cycle, void *conf) |
| { |
| #if (NGX_HAVE_REUSEPORT) |
| ngx_uint_t i; |
| ngx_listening_t *ls; |
| #endif |
| |
| if (ngx_get_conf(cycle->conf_ctx, ngx_events_module) == NULL) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, |
| "no \"events\" section in configuration"); |
| return NGX_CONF_ERROR; |
| } |
| |
| if (cycle->connection_n < cycle->listening.nelts + 1) { |
| |
| /* |
| * there should be at least one connection for each listening |
| * socket, plus an additional connection for channel |
| */ |
| |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, |
| "%ui worker_connections are not enough " |
| "for %ui listening sockets", |
| cycle->connection_n, cycle->listening.nelts); |
| |
| return NGX_CONF_ERROR; |
| } |
| |
| #if (NGX_HAVE_REUSEPORT) |
| |
| if (!ngx_test_config) { |
| |
| ls = cycle->listening.elts; |
| for (i = 0; i < cycle->listening.nelts; i++) { |
| |
| if (!ls[i].reuseport || ls[i].worker != 0) { |
| continue; |
| } |
| |
| if (ngx_clone_listening(cycle, &ls[i]) != NGX_OK) { |
| return NGX_CONF_ERROR; |
| } |
| |
| /* cloning may change cycle->listening.elts */ |
| |
| ls = cycle->listening.elts; |
| } |
| } |
| |
| #endif |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_event_module_init(ngx_cycle_t *cycle) |
| { |
| void ***cf; |
| u_char *shared; |
| size_t size, cl; |
| ngx_shm_t shm; |
| ngx_time_t *tp; |
| ngx_core_conf_t *ccf; |
| ngx_event_conf_t *ecf; |
| |
| cf = ngx_get_conf(cycle->conf_ctx, ngx_events_module); |
| ecf = (*cf)[ngx_event_core_module.ctx_index]; |
| |
| if (!ngx_test_config && ngx_process <= NGX_PROCESS_MASTER) { |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, |
| "using the \"%s\" event method", ecf->name); |
| } |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); |
| |
| ngx_timer_resolution = ccf->timer_resolution; |
| |
| #if !(NGX_WIN32) |
| { |
| ngx_int_t limit; |
| struct rlimit rlmt; |
| |
| if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "getrlimit(RLIMIT_NOFILE) failed, ignored"); |
| |
| } else { |
| if (ecf->connections > (ngx_uint_t) rlmt.rlim_cur |
| && (ccf->rlimit_nofile == NGX_CONF_UNSET |
| || ecf->connections > (ngx_uint_t) ccf->rlimit_nofile)) |
| { |
| limit = (ccf->rlimit_nofile == NGX_CONF_UNSET) ? |
| (ngx_int_t) rlmt.rlim_cur : ccf->rlimit_nofile; |
| |
| ngx_log_error(NGX_LOG_WARN, cycle->log, 0, |
| "%ui worker_connections exceed " |
| "open file resource limit: %i", |
| ecf->connections, limit); |
| } |
| } |
| } |
| #endif /* !(NGX_WIN32) */ |
| |
| |
| if (ccf->master == 0) { |
| return NGX_OK; |
| } |
| |
| if (ngx_accept_mutex_ptr) { |
| return NGX_OK; |
| } |
| |
| |
| /* cl should be equal to or greater than cache line size */ |
| |
| cl = 128; |
| |
| size = cl /* ngx_accept_mutex */ |
| + cl /* ngx_connection_counter */ |
| + cl; /* ngx_temp_number */ |
| |
| #if (NGX_STAT_STUB) |
| |
| size += cl /* ngx_stat_accepted */ |
| + cl /* ngx_stat_handled */ |
| + cl /* ngx_stat_requests */ |
| + cl /* ngx_stat_active */ |
| + cl /* ngx_stat_reading */ |
| + cl /* ngx_stat_writing */ |
| + cl; /* ngx_stat_waiting */ |
| |
| #endif |
| |
| shm.size = size; |
| ngx_str_set(&shm.name, "nginx_shared_zone"); |
| shm.log = cycle->log; |
| |
| if (ngx_shm_alloc(&shm) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| shared = shm.addr; |
| |
| ngx_accept_mutex_ptr = (ngx_atomic_t *) shared; |
| ngx_accept_mutex.spin = (ngx_uint_t) -1; |
| |
| if (ngx_shmtx_create(&ngx_accept_mutex, (ngx_shmtx_sh_t *) shared, |
| cycle->lock_file.data) |
| != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| |
| ngx_connection_counter = (ngx_atomic_t *) (shared + 1 * cl); |
| |
| (void) ngx_atomic_cmp_set(ngx_connection_counter, 0, 1); |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "counter: %p, %uA", |
| ngx_connection_counter, *ngx_connection_counter); |
| |
| ngx_temp_number = (ngx_atomic_t *) (shared + 2 * cl); |
| |
| tp = ngx_timeofday(); |
| |
| ngx_random_number = (tp->msec << 16) + ngx_pid; |
| |
| #if (NGX_STAT_STUB) |
| |
| ngx_stat_accepted = (ngx_atomic_t *) (shared + 3 * cl); |
| ngx_stat_handled = (ngx_atomic_t *) (shared + 4 * cl); |
| ngx_stat_requests = (ngx_atomic_t *) (shared + 5 * cl); |
| ngx_stat_active = (ngx_atomic_t *) (shared + 6 * cl); |
| ngx_stat_reading = (ngx_atomic_t *) (shared + 7 * cl); |
| ngx_stat_writing = (ngx_atomic_t *) (shared + 8 * cl); |
| ngx_stat_waiting = (ngx_atomic_t *) (shared + 9 * cl); |
| |
| #endif |
| |
| return NGX_OK; |
| } |
| |
| |
| #if !(NGX_WIN32) |
| |
| static void |
| ngx_timer_signal_handler(int signo) |
| { |
| ngx_event_timer_alarm = 1; |
| |
| #if 1 |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "timer signal"); |
| #endif |
| } |
| |
| #endif |
| |
| |
| static ngx_int_t |
| ngx_event_process_init(ngx_cycle_t *cycle) |
| { |
| ngx_uint_t m, i; |
| ngx_event_t *rev, *wev; |
| ngx_listening_t *ls; |
| ngx_connection_t *c, *next, *old; |
| ngx_core_conf_t *ccf; |
| ngx_event_conf_t *ecf; |
| ngx_event_module_t *module; |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); |
| ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module); |
| |
| if (ccf->master && ccf->worker_processes > 1 && ecf->accept_mutex) { |
| ngx_use_accept_mutex = 1; |
| ngx_accept_mutex_held = 0; |
| ngx_accept_mutex_delay = ecf->accept_mutex_delay; |
| |
| } else { |
| ngx_use_accept_mutex = 0; |
| } |
| |
| #if (NGX_WIN32) |
| |
| /* |
| * disable accept mutex on win32 as it may cause deadlock if |
| * grabbed by a process which can't accept connections |
| */ |
| |
| ngx_use_accept_mutex = 0; |
| |
| #endif |
| |
| ngx_queue_init(&ngx_posted_accept_events); |
| ngx_queue_init(&ngx_posted_next_events); |
| ngx_queue_init(&ngx_posted_events); |
| |
| if (ngx_event_timer_init(cycle->log) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| for (m = 0; cycle->modules[m]; m++) { |
| if (cycle->modules[m]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| if (cycle->modules[m]->ctx_index != ecf->use) { |
| continue; |
| } |
| |
| module = cycle->modules[m]->ctx; |
| |
| if (module->actions.init(cycle, ngx_timer_resolution) != NGX_OK) { |
| /* fatal */ |
| exit(2); |
| } |
| |
| break; |
| } |
| |
| #if !(NGX_WIN32) |
| |
| if (ngx_timer_resolution && !(ngx_event_flags & NGX_USE_TIMER_EVENT)) { |
| struct sigaction sa; |
| struct itimerval itv; |
| |
| ngx_memzero(&sa, sizeof(struct sigaction)); |
| sa.sa_handler = ngx_timer_signal_handler; |
| sigemptyset(&sa.sa_mask); |
| |
| if (sigaction(SIGALRM, &sa, NULL) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "sigaction(SIGALRM) failed"); |
| return NGX_ERROR; |
| } |
| |
| itv.it_interval.tv_sec = ngx_timer_resolution / 1000; |
| itv.it_interval.tv_usec = (ngx_timer_resolution % 1000) * 1000; |
| itv.it_value.tv_sec = ngx_timer_resolution / 1000; |
| itv.it_value.tv_usec = (ngx_timer_resolution % 1000 ) * 1000; |
| |
| if (setitimer(ITIMER_REAL, &itv, NULL) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setitimer() failed"); |
| } |
| } |
| |
| if (ngx_event_flags & NGX_USE_FD_EVENT) { |
| struct rlimit rlmt; |
| |
| if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "getrlimit(RLIMIT_NOFILE) failed"); |
| return NGX_ERROR; |
| } |
| |
| cycle->files_n = (ngx_uint_t) rlmt.rlim_cur; |
| |
| cycle->files = ngx_calloc(sizeof(ngx_connection_t *) * cycle->files_n, |
| cycle->log); |
| if (cycle->files == NULL) { |
| return NGX_ERROR; |
| } |
| } |
| |
| #else |
| |
| if (ngx_timer_resolution && !(ngx_event_flags & NGX_USE_TIMER_EVENT)) { |
| ngx_log_error(NGX_LOG_WARN, cycle->log, 0, |
| "the \"timer_resolution\" directive is not supported " |
| "with the configured event method, ignored"); |
| ngx_timer_resolution = 0; |
| } |
| |
| #endif |
| |
| cycle->connections = |
| ngx_alloc(sizeof(ngx_connection_t) * cycle->connection_n, cycle->log); |
| if (cycle->connections == NULL) { |
| return NGX_ERROR; |
| } |
| |
| c = cycle->connections; |
| |
| cycle->read_events = ngx_alloc(sizeof(ngx_event_t) * cycle->connection_n, |
| cycle->log); |
| if (cycle->read_events == NULL) { |
| return NGX_ERROR; |
| } |
| |
| rev = cycle->read_events; |
| for (i = 0; i < cycle->connection_n; i++) { |
| rev[i].closed = 1; |
| rev[i].instance = 1; |
| } |
| |
| cycle->write_events = ngx_alloc(sizeof(ngx_event_t) * cycle->connection_n, |
| cycle->log); |
| if (cycle->write_events == NULL) { |
| return NGX_ERROR; |
| } |
| |
| wev = cycle->write_events; |
| for (i = 0; i < cycle->connection_n; i++) { |
| wev[i].closed = 1; |
| } |
| |
| i = cycle->connection_n; |
| next = NULL; |
| |
| do { |
| i--; |
| |
| c[i].data = next; |
| c[i].read = &cycle->read_events[i]; |
| c[i].write = &cycle->write_events[i]; |
| c[i].fd = (ngx_socket_t) -1; |
| |
| next = &c[i]; |
| } while (i); |
| |
| cycle->free_connections = next; |
| cycle->free_connection_n = cycle->connection_n; |
| |
| /* for each listening socket */ |
| |
| ls = cycle->listening.elts; |
| for (i = 0; i < cycle->listening.nelts; i++) { |
| |
| #if (NGX_HAVE_REUSEPORT) |
| if (ls[i].reuseport && ls[i].worker != ngx_worker) { |
| continue; |
| } |
| #endif |
| |
| c = ngx_get_connection(ls[i].fd, cycle->log); |
| |
| if (c == NULL) { |
| return NGX_ERROR; |
| } |
| |
| c->type = ls[i].type; |
| c->log = &ls[i].log; |
| |
| c->listening = &ls[i]; |
| ls[i].connection = c; |
| |
| rev = c->read; |
| |
| rev->log = c->log; |
| rev->accept = 1; |
| |
| #if (NGX_HAVE_DEFERRED_ACCEPT) |
| rev->deferred_accept = ls[i].deferred_accept; |
| #endif |
| |
| if (!(ngx_event_flags & NGX_USE_IOCP_EVENT)) { |
| if (ls[i].previous) { |
| |
| /* |
| * delete the old accept events that were bound to |
| * the old cycle read events array |
| */ |
| |
| old = ls[i].previous->connection; |
| |
| if (ngx_del_event(old->read, NGX_READ_EVENT, NGX_CLOSE_EVENT) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| |
| old->fd = (ngx_socket_t) -1; |
| } |
| } |
| |
| #if (NGX_WIN32) |
| |
| if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
| ngx_iocp_conf_t *iocpcf; |
| |
| rev->handler = ngx_event_acceptex; |
| |
| if (ngx_use_accept_mutex) { |
| continue; |
| } |
| |
| if (ngx_add_event(rev, 0, NGX_IOCP_ACCEPT) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| ls[i].log.handler = ngx_acceptex_log_error; |
| |
| iocpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_iocp_module); |
| if (ngx_event_post_acceptex(&ls[i], iocpcf->post_acceptex) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| |
| } else { |
| rev->handler = ngx_event_accept; |
| |
| if (ngx_use_accept_mutex) { |
| continue; |
| } |
| |
| if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| } |
| |
| #else |
| |
| rev->handler = (c->type == SOCK_STREAM) ? ngx_event_accept |
| : ngx_event_recvmsg; |
| |
| #if (NGX_HAVE_REUSEPORT) |
| |
| if (ls[i].reuseport) { |
| if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| continue; |
| } |
| |
| #endif |
| |
| if (ngx_use_accept_mutex) { |
| continue; |
| } |
| |
| #if (NGX_HAVE_EPOLLEXCLUSIVE) |
| |
| if ((ngx_event_flags & NGX_USE_EPOLL_EVENT) |
| && ccf->worker_processes > 1) |
| { |
| if (ngx_add_event(rev, NGX_READ_EVENT, NGX_EXCLUSIVE_EVENT) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| |
| continue; |
| } |
| |
| #endif |
| |
| if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| #endif |
| |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| ngx_int_t |
| ngx_send_lowat(ngx_connection_t *c, size_t lowat) |
| { |
| int sndlowat; |
| |
| #if (NGX_HAVE_LOWAT_EVENT) |
| |
| if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
| c->write->available = lowat; |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| if (lowat == 0 || c->sndlowat) { |
| return NGX_OK; |
| } |
| |
| sndlowat = (int) lowat; |
| |
| if (setsockopt(c->fd, SOL_SOCKET, SO_SNDLOWAT, |
| (const void *) &sndlowat, sizeof(int)) |
| == -1) |
| { |
| ngx_connection_error(c, ngx_socket_errno, |
| "setsockopt(SO_SNDLOWAT) failed"); |
| return NGX_ERROR; |
| } |
| |
| c->sndlowat = 1; |
| |
| return NGX_OK; |
| } |
| |
| |
| static char * |
| ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| { |
| char *rv; |
| void ***ctx; |
| ngx_uint_t i; |
| ngx_conf_t pcf; |
| ngx_event_module_t *m; |
| |
| if (*(void **) conf) { |
| return "is duplicate"; |
| } |
| |
| /* count the number of the event modules and set up their indices */ |
| |
| ngx_event_max_module = ngx_count_modules(cf->cycle, NGX_EVENT_MODULE); |
| |
| ctx = ngx_pcalloc(cf->pool, sizeof(void *)); |
| if (ctx == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| *ctx = ngx_pcalloc(cf->pool, ngx_event_max_module * sizeof(void *)); |
| if (*ctx == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| *(void **) conf = ctx; |
| |
| for (i = 0; cf->cycle->modules[i]; i++) { |
| if (cf->cycle->modules[i]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| m = cf->cycle->modules[i]->ctx; |
| |
| if (m->create_conf) { |
| (*ctx)[cf->cycle->modules[i]->ctx_index] = |
| m->create_conf(cf->cycle); |
| if ((*ctx)[cf->cycle->modules[i]->ctx_index] == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| } |
| } |
| |
| pcf = *cf; |
| cf->ctx = ctx; |
| cf->module_type = NGX_EVENT_MODULE; |
| cf->cmd_type = NGX_EVENT_CONF; |
| |
| rv = ngx_conf_parse(cf, NULL); |
| |
| *cf = pcf; |
| |
| if (rv != NGX_CONF_OK) { |
| return rv; |
| } |
| |
| for (i = 0; cf->cycle->modules[i]; i++) { |
| if (cf->cycle->modules[i]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| m = cf->cycle->modules[i]->ctx; |
| |
| if (m->init_conf) { |
| rv = m->init_conf(cf->cycle, |
| (*ctx)[cf->cycle->modules[i]->ctx_index]); |
| if (rv != NGX_CONF_OK) { |
| return rv; |
| } |
| } |
| } |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static char * |
| ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| { |
| ngx_event_conf_t *ecf = conf; |
| |
| ngx_str_t *value; |
| |
| if (ecf->connections != NGX_CONF_UNSET_UINT) { |
| return "is duplicate"; |
| } |
| |
| value = cf->args->elts; |
| ecf->connections = ngx_atoi(value[1].data, value[1].len); |
| if (ecf->connections == (ngx_uint_t) NGX_ERROR) { |
| ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| "invalid number \"%V\"", &value[1]); |
| |
| return NGX_CONF_ERROR; |
| } |
| |
| cf->cycle->connection_n = ecf->connections; |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static char * |
| ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| { |
| ngx_event_conf_t *ecf = conf; |
| |
| ngx_int_t m; |
| ngx_str_t *value; |
| ngx_event_conf_t *old_ecf; |
| ngx_event_module_t *module; |
| |
| if (ecf->use != NGX_CONF_UNSET_UINT) { |
| return "is duplicate"; |
| } |
| |
| value = cf->args->elts; |
| |
| if (cf->cycle->old_cycle->conf_ctx) { |
| old_ecf = ngx_event_get_conf(cf->cycle->old_cycle->conf_ctx, |
| ngx_event_core_module); |
| } else { |
| old_ecf = NULL; |
| } |
| |
| |
| for (m = 0; cf->cycle->modules[m]; m++) { |
| if (cf->cycle->modules[m]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| module = cf->cycle->modules[m]->ctx; |
| if (module->name->len == value[1].len) { |
| if (ngx_strcmp(module->name->data, value[1].data) == 0) { |
| ecf->use = cf->cycle->modules[m]->ctx_index; |
| ecf->name = module->name->data; |
| |
| if (ngx_process == NGX_PROCESS_SINGLE |
| && old_ecf |
| && old_ecf->use != ecf->use) |
| { |
| ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| "when the server runs without a master process " |
| "the \"%V\" event type must be the same as " |
| "in previous configuration - \"%s\" " |
| "and it cannot be changed on the fly, " |
| "to change it you need to stop server " |
| "and start it again", |
| &value[1], old_ecf->name); |
| |
| return NGX_CONF_ERROR; |
| } |
| |
| return NGX_CONF_OK; |
| } |
| } |
| } |
| |
| ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| "invalid event type \"%V\"", &value[1]); |
| |
| return NGX_CONF_ERROR; |
| } |
| |
| |
| static char * |
| ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| { |
| #if (NGX_DEBUG) |
| ngx_event_conf_t *ecf = conf; |
| |
| ngx_int_t rc; |
| ngx_str_t *value; |
| ngx_url_t u; |
| ngx_cidr_t c, *cidr; |
| ngx_uint_t i; |
| struct sockaddr_in *sin; |
| #if (NGX_HAVE_INET6) |
| struct sockaddr_in6 *sin6; |
| #endif |
| |
| value = cf->args->elts; |
| |
| #if (NGX_HAVE_UNIX_DOMAIN) |
| |
| if (ngx_strcmp(value[1].data, "unix:") == 0) { |
| cidr = ngx_array_push(&ecf->debug_connection); |
| if (cidr == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| cidr->family = AF_UNIX; |
| return NGX_CONF_OK; |
| } |
| |
| #endif |
| |
| rc = ngx_ptocidr(&value[1], &c); |
| |
| if (rc != NGX_ERROR) { |
| if (rc == NGX_DONE) { |
| ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
| "low address bits of %V are meaningless", |
| &value[1]); |
| } |
| |
| cidr = ngx_array_push(&ecf->debug_connection); |
| if (cidr == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| *cidr = c; |
| |
| return NGX_CONF_OK; |
| } |
| |
| ngx_memzero(&u, sizeof(ngx_url_t)); |
| u.host = value[1]; |
| |
| if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
| if (u.err) { |
| ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| "%s in debug_connection \"%V\"", |
| u.err, &u.host); |
| } |
| |
| return NGX_CONF_ERROR; |
| } |
| |
| cidr = ngx_array_push_n(&ecf->debug_connection, u.naddrs); |
| if (cidr == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| ngx_memzero(cidr, u.naddrs * sizeof(ngx_cidr_t)); |
| |
| for (i = 0; i < u.naddrs; i++) { |
| cidr[i].family = u.addrs[i].sockaddr->sa_family; |
| |
| switch (cidr[i].family) { |
| |
| #if (NGX_HAVE_INET6) |
| case AF_INET6: |
| sin6 = (struct sockaddr_in6 *) u.addrs[i].sockaddr; |
| cidr[i].u.in6.addr = sin6->sin6_addr; |
| ngx_memset(cidr[i].u.in6.mask.s6_addr, 0xff, 16); |
| break; |
| #endif |
| |
| default: /* AF_INET */ |
| sin = (struct sockaddr_in *) u.addrs[i].sockaddr; |
| cidr[i].u.in.addr = sin->sin_addr.s_addr; |
| cidr[i].u.in.mask = 0xffffffff; |
| break; |
| } |
| } |
| |
| #else |
| |
| ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
| "\"debug_connection\" is ignored, you need to rebuild " |
| "nginx using --with-debug option to enable it"); |
| |
| #endif |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static void * |
| ngx_event_core_create_conf(ngx_cycle_t *cycle) |
| { |
| ngx_event_conf_t *ecf; |
| |
| ecf = ngx_palloc(cycle->pool, sizeof(ngx_event_conf_t)); |
| if (ecf == NULL) { |
| return NULL; |
| } |
| |
| ecf->connections = NGX_CONF_UNSET_UINT; |
| ecf->use = NGX_CONF_UNSET_UINT; |
| ecf->multi_accept = NGX_CONF_UNSET; |
| ecf->accept_mutex = NGX_CONF_UNSET; |
| ecf->accept_mutex_delay = NGX_CONF_UNSET_MSEC; |
| ecf->name = (void *) NGX_CONF_UNSET; |
| |
| #if (NGX_DEBUG) |
| |
| if (ngx_array_init(&ecf->debug_connection, cycle->pool, 4, |
| sizeof(ngx_cidr_t)) == NGX_ERROR) |
| { |
| return NULL; |
| } |
| |
| #endif |
| |
| return ecf; |
| } |
| |
| |
| static char * |
| ngx_event_core_init_conf(ngx_cycle_t *cycle, void *conf) |
| { |
| ngx_event_conf_t *ecf = conf; |
| |
| #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL) |
| int fd; |
| #endif |
| ngx_int_t i; |
| ngx_module_t *module; |
| ngx_event_module_t *event_module; |
| |
| module = NULL; |
| |
| #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL) |
| |
| fd = epoll_create(100); |
| |
| if (fd != -1) { |
| (void) close(fd); |
| module = &ngx_epoll_module; |
| |
| } else if (ngx_errno != NGX_ENOSYS) { |
| module = &ngx_epoll_module; |
| } |
| |
| #endif |
| |
| #if (NGX_HAVE_DEVPOLL) && !(NGX_TEST_BUILD_DEVPOLL) |
| |
| module = &ngx_devpoll_module; |
| |
| #endif |
| |
| #if (NGX_HAVE_KQUEUE) |
| |
| module = &ngx_kqueue_module; |
| |
| #endif |
| |
| #if (NGX_HAVE_SELECT) |
| |
| if (module == NULL) { |
| module = &ngx_select_module; |
| } |
| |
| #endif |
| |
| if (module == NULL) { |
| for (i = 0; cycle->modules[i]; i++) { |
| |
| if (cycle->modules[i]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| event_module = cycle->modules[i]->ctx; |
| |
| if (ngx_strcmp(event_module->name->data, event_core_name.data) == 0) |
| { |
| continue; |
| } |
| |
| module = cycle->modules[i]; |
| break; |
| } |
| } |
| |
| if (module == NULL) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "no events module found"); |
| return NGX_CONF_ERROR; |
| } |
| |
| ngx_conf_init_uint_value(ecf->connections, DEFAULT_CONNECTIONS); |
| cycle->connection_n = ecf->connections; |
| |
| ngx_conf_init_uint_value(ecf->use, module->ctx_index); |
| |
| event_module = module->ctx; |
| ngx_conf_init_ptr_value(ecf->name, event_module->name->data); |
| |
| ngx_conf_init_value(ecf->multi_accept, 0); |
| ngx_conf_init_value(ecf->accept_mutex, 0); |
| ngx_conf_init_msec_value(ecf->accept_mutex_delay, 500); |
| |
| return NGX_CONF_OK; |
| } |
