| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #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_devpoll_module; |
| extern ngx_module_t ngx_epoll_module; |
| extern ngx_module_t ngx_rtsig_module; |
| extern ngx_module_t ngx_select_module; |
| |
| |
| 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_create_conf(ngx_cycle_t *cycle); |
| static char *ngx_event_init_conf(ngx_cycle_t *cycle, void *conf); |
| static char *ngx_accept_mutex_check(ngx_conf_t *cf, void *post, void *data); |
| |
| |
| static ngx_uint_t ngx_event_max_module; |
| |
| ngx_uint_t ngx_event_flags; |
| ngx_event_actions_t ngx_event_actions; |
| |
| |
| ngx_atomic_t connection_counter; |
| ngx_atomic_t *ngx_connection_counter = &connection_counter; |
| |
| |
| ngx_atomic_t *ngx_accept_mutex_ptr; |
| ngx_atomic_t *ngx_accept_mutex; |
| ngx_uint_t ngx_accept_mutex_held; |
| ngx_msec_t ngx_accept_mutex_delay; |
| ngx_int_t ngx_accept_disabled; |
| |
| |
| #if (NGX_STAT_STUB) |
| |
| ngx_atomic_t ngx_stat_accepted0; |
| ngx_atomic_t *ngx_stat_accepted = &ngx_stat_accepted0; |
| ngx_atomic_t ngx_stat_handled0; |
| ngx_atomic_t *ngx_stat_handled = &ngx_stat_handled0; |
| ngx_atomic_t ngx_stat_requests0; |
| ngx_atomic_t *ngx_stat_requests = &ngx_stat_requests0; |
| ngx_atomic_t ngx_stat_active0; |
| ngx_atomic_t *ngx_stat_active = &ngx_stat_active0; |
| ngx_atomic_t ngx_stat_reading0; |
| ngx_atomic_t *ngx_stat_reading = &ngx_stat_reading0; |
| ngx_atomic_t ngx_stat_writing0; |
| ngx_atomic_t *ngx_stat_writing = &ngx_stat_writing0; |
| |
| #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, |
| NULL |
| }; |
| |
| |
| 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 module */ |
| NULL /* init process */ |
| }; |
| |
| |
| static ngx_str_t event_core_name = ngx_string("event_core"); |
| |
| static ngx_conf_post_t ngx_accept_mutex_post = { ngx_accept_mutex_check } ; |
| |
| |
| static ngx_command_t ngx_event_core_commands[] = { |
| |
| { ngx_string("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_TAKE1, |
| ngx_conf_set_flag_slot, |
| 0, |
| offsetof(ngx_event_conf_t, multi_accept), |
| NULL }, |
| |
| { ngx_string("accept_mutex"), |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_flag_slot, |
| 0, |
| offsetof(ngx_event_conf_t, accept_mutex), |
| &ngx_accept_mutex_post }, |
| |
| { 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 |
| }; |
| |
| |
| ngx_event_module_t ngx_event_core_module_ctx = { |
| &event_core_name, |
| ngx_event_create_conf, /* create configuration */ |
| ngx_event_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 */ |
| ngx_event_module_init, /* init module */ |
| ngx_event_process_init /* init process */ |
| }; |
| |
| |
| ngx_int_t |
| ngx_handle_read_event(ngx_event_t *rev, u_int 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_ONESHOT_EVENT) { |
| |
| /* event ports */ |
| |
| if (!rev->active) { |
| if (ngx_add_event(rev, NGX_READ_EVENT, NGX_ONESHOT_EVENT) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| } |
| |
| return NGX_OK; |
| } |
| |
| /* aio, iocp, rtsig */ |
| |
| return NGX_OK; |
| } |
| |
| |
| ngx_int_t |
| ngx_handle_write_event(ngx_event_t *wev, size_t lowat) |
| { |
| ngx_connection_t *c; |
| |
| if (lowat) { |
| c = (ngx_connection_t *) 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_ONESHOT_EVENT) { |
| |
| /* event ports */ |
| |
| if (!wev->active) { |
| if (ngx_add_event(wev, NGX_WRITE_EVENT, NGX_ONESHOT_EVENT) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| } |
| |
| return NGX_OK; |
| } |
| |
| /* aio, iocp, rtsig */ |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_event_module_init(ngx_cycle_t *cycle) |
| { |
| #if !(NGX_WIN32) |
| |
| size_t size; |
| void ***cf; |
| char *shared; |
| ngx_core_conf_t *ccf; |
| ngx_event_conf_t *ecf; |
| |
| cf = ngx_get_conf(cycle->conf_ctx, ngx_events_module); |
| |
| if (cf == NULL) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, |
| "no \"events\" section in configuration"); |
| return NGX_ERROR; |
| } |
| |
| ecf = (*cf)[ngx_event_core_module.ctx_index]; |
| |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, |
| "using the \"%s\" event method", ecf->name); |
| |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); |
| |
| if (ccf->master == 0 || ngx_accept_mutex_ptr) { |
| return NGX_OK; |
| } |
| |
| |
| /* TODO: adjust cache line size, 128 is P4 cache line size */ |
| |
| size = 128 /* ngx_accept_mutex */ |
| + 128; /* ngx_connection_counter */ |
| |
| #if (NGX_STAT_STUB) |
| |
| size += 128 /* ngx_stat_accepted */ |
| + 128 /* ngx_stat_handled */ |
| + 128 /* ngx_stat_requests */ |
| + 128 /* ngx_stat_active */ |
| + 128 /* ngx_stat_reading */ |
| + 128; /* ngx_stat_writing */ |
| |
| #endif |
| |
| shared = ngx_create_shared_memory(size, cycle->log); |
| if (shared == NULL) { |
| return NGX_ERROR; |
| } |
| |
| ngx_accept_mutex_ptr = (ngx_atomic_t *) shared; |
| ngx_connection_counter = (ngx_atomic_t *) (shared + 128); |
| |
| #if (NGX_STAT_STUB) |
| |
| ngx_stat_accepted = (ngx_atomic_t *) (shared + 2 * 128); |
| ngx_stat_handled = (ngx_atomic_t *) (shared + 3 * 128); |
| ngx_stat_requests = (ngx_atomic_t *) (shared + 4 * 128); |
| ngx_stat_active = (ngx_atomic_t *) (shared + 5 * 128); |
| ngx_stat_reading = (ngx_atomic_t *) (shared + 6 * 128); |
| ngx_stat_writing = (ngx_atomic_t *) (shared + 7 * 128); |
| |
| #endif |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "counter: %p, %d", |
| ngx_connection_counter, *ngx_connection_counter); |
| |
| #endif |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_event_process_init(ngx_cycle_t *cycle) |
| { |
| ngx_uint_t m, i; |
| ngx_socket_t fd; |
| ngx_event_t *rev, *wev; |
| ngx_listening_t *s; |
| ngx_connection_t *c; |
| ngx_core_conf_t *ccf; |
| ngx_event_conf_t *ecf; |
| ngx_event_module_t *module; |
| #if (NGX_WIN32) |
| ngx_iocp_conf_t *iocpcf; |
| #endif |
| |
| 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 (ngx_accept_mutex_ptr && ccf->worker_processes > 1 && ecf->accept_mutex) |
| { |
| ngx_accept_mutex = ngx_accept_mutex_ptr; |
| ngx_accept_mutex_held = 0; |
| ngx_accept_mutex_delay = ecf->accept_mutex_delay; |
| } |
| |
| #if (NGX_THREADS) |
| ngx_posted_events_mutex = ngx_mutex_init(cycle->log, 0); |
| if (ngx_posted_events_mutex == NULL) { |
| return NGX_ERROR; |
| } |
| #endif |
| |
| if (ngx_event_timer_init(cycle->log) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| cycle->connection_n = ecf->connections; |
| |
| for (m = 0; ngx_modules[m]; m++) { |
| if (ngx_modules[m]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| if (ngx_modules[m]->ctx_index == ecf->use) { |
| module = ngx_modules[m]->ctx; |
| if (module->actions.init(cycle) == NGX_ERROR) { |
| /* fatal */ |
| exit(2); |
| } |
| break; |
| } |
| } |
| |
| cycle->connections = ngx_alloc(sizeof(ngx_connection_t) * ecf->connections, |
| cycle->log); |
| if (cycle->connections == NULL) { |
| return NGX_ERROR; |
| } |
| |
| c = cycle->connections; |
| for (i = 0; i < cycle->connection_n; i++) { |
| c[i].fd = (ngx_socket_t) -1; |
| c[i].data = NULL; |
| #if (NGX_THREADS) |
| c[i].lock = 0; |
| #endif |
| } |
| |
| cycle->read_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections, |
| 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; |
| #if (NGX_THREADS) |
| rev[i].lock = &c[i].lock; |
| rev[i].own_lock = &c[i].lock; |
| #endif |
| } |
| |
| cycle->write_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections, |
| 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; |
| #if (NGX_THREADS) |
| wev[i].lock = &c[i].lock; |
| wev[i].own_lock = &c[i].lock; |
| #endif |
| } |
| |
| /* for each listening socket */ |
| |
| s = cycle->listening.elts; |
| for (i = 0; i < cycle->listening.nelts; i++) { |
| |
| fd = s[i].fd; |
| |
| #if (NGX_WIN32) |
| /* |
| * Winsock assignes a socket number divisible by 4 |
| * so to find a connection we divide a socket number by 4. |
| */ |
| |
| fd /= 4; |
| #endif |
| |
| c = &cycle->connections[fd]; |
| rev = &cycle->read_events[fd]; |
| wev = &cycle->write_events[fd]; |
| |
| ngx_memzero(c, sizeof(ngx_connection_t)); |
| ngx_memzero(rev, sizeof(ngx_event_t)); |
| ngx_memzero(wev, sizeof(ngx_event_t)); |
| |
| c->fd = s[i].fd; |
| c->listening = &s[i]; |
| |
| c->ctx = s[i].ctx; |
| c->servers = s[i].servers; |
| c->log = s[i].log; |
| c->read = rev; |
| |
| /* required by iocp in "c->write->active = 1" */ |
| c->write = wev; |
| |
| /* required by poll */ |
| wev->index = NGX_INVALID_INDEX; |
| |
| rev->log = c->log; |
| rev->data = c; |
| rev->index = NGX_INVALID_INDEX; |
| |
| rev->available = 0; |
| |
| rev->accept = 1; |
| |
| #if (NGX_HAVE_DEFERRED_ACCEPT) |
| rev->deferred_accept = s[i].deferred_accept; |
| #endif |
| |
| if (!(ngx_event_flags & NGX_USE_IOCP_EVENT)) { |
| if (s[i].remain) { |
| |
| /* |
| * delete the old accept events that were bound to |
| * the old cycle read events array |
| */ |
| |
| if (ngx_del_event(&cycle->old_cycle->read_events[fd], |
| NGX_READ_EVENT, NGX_CLOSE_EVENT) == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| |
| cycle->old_cycle->connections[fd].fd = (ngx_socket_t) -1; |
| } |
| } |
| |
| #if (NGX_WIN32) |
| |
| if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
| rev->handler = ngx_event_acceptex; |
| |
| if (ngx_add_event(rev, 0, NGX_IOCP_ACCEPT) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| iocpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_iocp_module); |
| if (ngx_event_post_acceptex(&s[i], iocpcf->post_acceptex) |
| == NGX_ERROR) |
| { |
| return NGX_ERROR; |
| } |
| |
| } else { |
| rev->handler = ngx_event_accept; |
| |
| if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| } |
| |
| #else |
| |
| rev->handler = ngx_event_accept; |
| |
| if (ngx_accept_mutex) { |
| continue; |
| } |
| |
| if (ngx_event_flags & NGX_USE_RTSIG_EVENT) { |
| if (ngx_add_conn(c) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| } else { |
| 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; |
| |
| /* count the number of the event modules and set up their indices */ |
| |
| ngx_event_max_module = 0; |
| for (i = 0; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| ngx_modules[i]->ctx_index = ngx_event_max_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; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| m = ngx_modules[i]->ctx; |
| |
| if (m->create_conf) { |
| (*ctx)[ngx_modules[i]->ctx_index] = m->create_conf(cf->cycle); |
| if ((*ctx)[ngx_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; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| m = ngx_modules[i]->ctx; |
| |
| if (m->init_conf) { |
| rv = m->init_conf(cf->cycle, (*ctx)[ngx_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; ngx_modules[m]; m++) { |
| if (ngx_modules[m]->type != NGX_EVENT_MODULE) { |
| continue; |
| } |
| |
| module = ngx_modules[m]->ctx; |
| if (module->name->len == value[1].len) { |
| if (ngx_strcmp(module->name->data, value[1].data) == 0) { |
| ecf->use = ngx_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 can not 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; |
| |
| in_addr_t *addr; |
| ngx_str_t *value; |
| struct hostent *h; |
| |
| value = cf->args->elts; |
| |
| /* AF_INET only */ |
| |
| addr = ngx_array_push(&ecf->debug_connection); |
| if (addr == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| *addr = inet_addr((char *) value[1].data); |
| |
| if (*addr != INADDR_NONE) { |
| return NGX_OK; |
| } |
| |
| h = gethostbyname((char *) value[1].data); |
| |
| if (h == NULL || h->h_addr_list[0] == NULL) { |
| ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| "host \"%s\" not found", value[1].data); |
| return NGX_CONF_ERROR; |
| } |
| |
| *addr = *(in_addr_t *)(h->h_addr_list[0]); |
| |
| #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_OK; |
| } |
| |
| |
| static void * |
| ngx_event_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 NGX_CONF_ERROR; |
| } |
| |
| 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(in_addr_t)) == NGX_ERROR) |
| { |
| return NGX_CONF_ERROR; |
| } |
| |
| #endif |
| |
| return ecf; |
| } |
| |
| |
| static char * |
| ngx_event_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 |
| #if (NGX_HAVE_RTSIG) |
| ngx_uint_t rtsig; |
| #endif |
| ngx_int_t i, connections; |
| ngx_module_t *module; |
| ngx_core_conf_t *ccf; |
| ngx_event_module_t *event_module; |
| |
| connections = NGX_CONF_UNSET_UINT; |
| module = NULL; |
| |
| #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL) |
| |
| fd = epoll_create(100); |
| |
| if (fd != -1) { |
| close(fd); |
| connections = DEFAULT_CONNECTIONS; |
| module = &ngx_epoll_module; |
| |
| } else if (ngx_errno != NGX_ENOSYS) { |
| connections = DEFAULT_CONNECTIONS; |
| module = &ngx_epoll_module; |
| } |
| |
| #endif |
| |
| #if (NGX_HAVE_RTSIG) |
| |
| if (module == NULL) { |
| connections = DEFAULT_CONNECTIONS; |
| module = &ngx_rtsig_module; |
| rtsig = 1; |
| |
| } else { |
| rtsig = 0; |
| } |
| |
| #endif |
| |
| #if (NGX_HAVE_DEVPOLL) |
| |
| connections = DEFAULT_CONNECTIONS; |
| module = &ngx_devpoll_module; |
| |
| #endif |
| |
| #if (NGX_HAVE_KQUEUE) |
| |
| connections = DEFAULT_CONNECTIONS; |
| module = &ngx_kqueue_module; |
| |
| #endif |
| |
| #if (NGX_HAVE_SELECT) |
| |
| if (module == NULL) { |
| |
| #if (NGX_WIN32 || FD_SETSIZE >= DEFAULT_CONNECTIONS) |
| connections = DEFAULT_CONNECTIONS; |
| #else |
| connections = FD_SETSIZE; |
| #endif |
| module = &ngx_select_module; |
| } |
| |
| #endif |
| |
| if (module == NULL) { |
| for (i = 0; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->type == NGX_EVENT_MODULE) { |
| event_module = ngx_modules[i]->ctx; |
| |
| if (ngx_strcmp(event_module->name->data, event_core_name.data) |
| == 0) |
| { |
| continue; |
| } |
| |
| module = ngx_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_unsigned_value(ecf->connections, connections); |
| cycle->connection_n = ecf->connections; |
| |
| ngx_conf_init_unsigned_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, 1); |
| ngx_conf_init_msec_value(ecf->accept_mutex_delay, 500); |
| |
| |
| #if (NGX_HAVE_RTSIG) |
| |
| if (!rtsig) { |
| return NGX_CONF_OK; |
| } |
| |
| #endif |
| |
| if (ecf->accept_mutex) { |
| return NGX_CONF_OK; |
| } |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); |
| |
| if (ccf->worker_processes == 0) { |
| return NGX_CONF_OK; |
| } |
| |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, |
| "the \"rtsig\" method requires \"accept_mutex\" to be on"); |
| |
| return NGX_CONF_ERROR; |
| } |
| |
| |
| static char * |
| ngx_accept_mutex_check(ngx_conf_t *cf, void *post, void *data) |
| { |
| #if !(NGX_HAVE_ATOMIC_OPS) |
| |
| ngx_flag_t *fp = data; |
| |
| *fp = 0; |
| |
| ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
| "\"accept_mutex\" is not supported on this platform, " |
| "ignored"); |
| |
| #endif |
| |
| return NGX_CONF_OK; |
| } |
