| |
| /* |
| * Copyright (C) 2002-2004 Igor Sysoev, http://sysoev.ru/en/ |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| #include <ngx_kqueue_module.h> |
| |
| |
| typedef struct { |
| int changes; |
| int events; |
| } ngx_kqueue_conf_t; |
| |
| |
| static int ngx_kqueue_init(ngx_cycle_t *cycle); |
| static void ngx_kqueue_done(ngx_cycle_t *cycle); |
| static int ngx_kqueue_add_event(ngx_event_t *ev, int event, u_int flags); |
| static int ngx_kqueue_del_event(ngx_event_t *ev, int event, u_int flags); |
| static int ngx_kqueue_set_event(ngx_event_t *ev, int filter, u_int flags); |
| static int ngx_kqueue_process_events(ngx_log_t *log); |
| |
| static void *ngx_kqueue_create_conf(ngx_cycle_t *cycle); |
| static char *ngx_kqueue_init_conf(ngx_cycle_t *cycle, void *conf); |
| |
| |
| int ngx_kqueue = -1; |
| |
| static struct kevent *change_list, *event_list; |
| static int max_changes, nchanges, nevents; |
| |
| |
| static ngx_str_t kqueue_name = ngx_string("kqueue"); |
| |
| static ngx_command_t ngx_kqueue_commands[] = { |
| |
| {ngx_string("kqueue_changes"), |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_num_slot, |
| 0, |
| offsetof(ngx_kqueue_conf_t, changes), |
| NULL}, |
| |
| {ngx_string("kqueue_events"), |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_num_slot, |
| 0, |
| offsetof(ngx_kqueue_conf_t, events), |
| NULL}, |
| |
| ngx_null_command |
| }; |
| |
| |
| ngx_event_module_t ngx_kqueue_module_ctx = { |
| &kqueue_name, |
| ngx_kqueue_create_conf, /* create configuration */ |
| ngx_kqueue_init_conf, /* init configuration */ |
| |
| { |
| ngx_kqueue_add_event, /* add an event */ |
| ngx_kqueue_del_event, /* delete an event */ |
| ngx_kqueue_add_event, /* enable an event */ |
| ngx_kqueue_del_event, /* disable an event */ |
| NULL, /* add an connection */ |
| NULL, /* delete an connection */ |
| ngx_kqueue_process_events, /* process the events */ |
| ngx_kqueue_init, /* init the events */ |
| ngx_kqueue_done /* done the events */ |
| } |
| |
| }; |
| |
| ngx_module_t ngx_kqueue_module = { |
| NGX_MODULE, |
| &ngx_kqueue_module_ctx, /* module context */ |
| ngx_kqueue_commands, /* module directives */ |
| NGX_EVENT_MODULE, /* module type */ |
| NULL, /* init module */ |
| NULL /* init child */ |
| }; |
| |
| |
| |
| static int ngx_kqueue_init(ngx_cycle_t *cycle) |
| { |
| struct timespec ts; |
| ngx_kqueue_conf_t *kcf; |
| |
| kcf = ngx_event_get_conf(cycle->conf_ctx, ngx_kqueue_module); |
| |
| if (ngx_kqueue == -1) { |
| ngx_kqueue = kqueue(); |
| |
| if (ngx_kqueue == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| "kqueue() failed"); |
| return NGX_ERROR; |
| } |
| } |
| |
| if (max_changes < kcf->changes) { |
| if (nchanges) { |
| ts.tv_sec = 0; |
| ts.tv_nsec = 0; |
| |
| if (kevent(ngx_kqueue, change_list, nchanges, NULL, 0, &ts) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "kevent() failed"); |
| return NGX_ERROR; |
| } |
| nchanges = 0; |
| } |
| |
| if (change_list) { |
| ngx_free(change_list); |
| } |
| |
| change_list = ngx_alloc(kcf->changes * sizeof(struct kevent), |
| cycle->log); |
| if (change_list == NULL) { |
| return NGX_ERROR; |
| } |
| } |
| |
| max_changes = kcf->changes; |
| |
| if (nevents < kcf->events) { |
| if (event_list) { |
| ngx_free(event_list); |
| } |
| |
| event_list = ngx_alloc(kcf->events * sizeof(struct kevent), |
| cycle->log); |
| if (event_list == NULL) { |
| return NGX_ERROR; |
| } |
| } |
| |
| nevents = kcf->events; |
| |
| ngx_io = ngx_os_io; |
| |
| ngx_event_actions = ngx_kqueue_module_ctx.actions; |
| |
| ngx_event_flags = NGX_USE_ONESHOT_EVENT |
| #if (HAVE_CLEAR_EVENT) |
| |NGX_USE_CLEAR_EVENT |
| #else |
| |NGX_USE_LEVEL_EVENT |
| #endif |
| #if (HAVE_LOWAT_EVENT) |
| |NGX_HAVE_LOWAT_EVENT |
| #endif |
| |NGX_HAVE_KQUEUE_EVENT; |
| |
| return NGX_OK; |
| } |
| |
| |
| static void ngx_kqueue_done(ngx_cycle_t *cycle) |
| { |
| if (close(ngx_kqueue) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "kqueue close() failed"); |
| } |
| |
| ngx_kqueue = -1; |
| |
| ngx_free(change_list); |
| ngx_free(event_list); |
| |
| change_list = NULL; |
| event_list = NULL; |
| max_changes = 0; |
| nchanges = 0; |
| nevents = 0; |
| } |
| |
| |
| static int ngx_kqueue_add_event(ngx_event_t *ev, int event, u_int flags) |
| { |
| ngx_event_t *e; |
| ngx_connection_t *c; |
| |
| ev->active = 1; |
| ev->disabled = 0; |
| ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0; |
| |
| if (nchanges > 0 |
| && ev->index < (u_int) nchanges |
| && ((uintptr_t) change_list[ev->index].udata & (uintptr_t) ~1) |
| == (uintptr_t) ev) |
| { |
| if (change_list[ev->index].flags == EV_DISABLE) { |
| |
| /* |
| * if the EV_DISABLE is still not passed to a kernel |
| * we will not pass it |
| */ |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
| "kevent activated: %d: ft:%d", |
| ngx_event_ident(ev->data), event); |
| |
| if (ev->index < (u_int) --nchanges) { |
| e = (ngx_event_t *) change_list[nchanges].udata; |
| change_list[ev->index] = change_list[nchanges]; |
| e->index = ev->index; |
| } |
| |
| return NGX_OK; |
| } |
| |
| c = ev->data; |
| ngx_log_error(NGX_LOG_ALERT, ev->log, 0, |
| "previous event on #%d were not passed in kernel", c->fd); |
| |
| return NGX_ERROR; |
| } |
| |
| return ngx_kqueue_set_event(ev, event, EV_ADD|EV_ENABLE|flags); |
| } |
| |
| |
| static int ngx_kqueue_del_event(ngx_event_t *ev, int event, u_int flags) |
| { |
| ngx_event_t *e; |
| |
| ev->active = 0; |
| ev->disabled = 0; |
| |
| if (nchanges > 0 |
| && ev->index < (u_int) nchanges |
| && ((uintptr_t) change_list[ev->index].udata & (uintptr_t) ~1) |
| == (uintptr_t) ev) |
| { |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
| "kevent deleted: %d: ft:%d", |
| ngx_event_ident(ev->data), event); |
| |
| /* if the event is still not passed to a kernel we will not pass it */ |
| |
| if (ev->index < (u_int) --nchanges) { |
| e = (ngx_event_t *) change_list[nchanges].udata; |
| change_list[ev->index] = change_list[nchanges]; |
| e->index = ev->index; |
| } |
| |
| return NGX_OK; |
| } |
| |
| /* |
| * when the file descriptor is closed a kqueue automatically deletes |
| * its filters so we do not need to delete explicity the event |
| * before the closing the file descriptor. |
| */ |
| |
| if (flags & NGX_CLOSE_EVENT) { |
| return NGX_OK; |
| } |
| |
| if (flags & NGX_DISABLE_EVENT) { |
| ev->disabled = 1; |
| } |
| |
| return ngx_kqueue_set_event(ev, event, |
| flags & NGX_DISABLE_EVENT ? EV_DISABLE : EV_DELETE); |
| } |
| |
| |
| static int ngx_kqueue_set_event(ngx_event_t *ev, int filter, u_int flags) |
| { |
| struct timespec ts; |
| ngx_connection_t *c; |
| |
| c = ev->data; |
| |
| ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
| "kevent set event: %d: ft:%d fl:%04X", |
| c->fd, filter, flags); |
| |
| if (nchanges >= max_changes) { |
| ngx_log_error(NGX_LOG_WARN, ev->log, 0, |
| "kqueue change list is filled up"); |
| |
| ts.tv_sec = 0; |
| ts.tv_nsec = 0; |
| |
| if (kevent(ngx_kqueue, change_list, nchanges, NULL, 0, &ts) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "kevent() failed"); |
| return NGX_ERROR; |
| } |
| |
| nchanges = 0; |
| } |
| |
| change_list[nchanges].ident = c->fd; |
| change_list[nchanges].filter = filter; |
| change_list[nchanges].flags = flags; |
| change_list[nchanges].udata = (void *) ((uintptr_t) ev | ev->instance); |
| |
| if (filter == EVFILT_VNODE) { |
| change_list[nchanges].fflags = NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND |
| |NOTE_ATTRIB|NOTE_RENAME |
| #if (__FreeBSD__ == 4 && __FreeBSD_version >= 430000) \ |
| || __FreeBSD_version >= 500018 |
| |NOTE_REVOKE |
| #endif |
| ; |
| change_list[nchanges].data = 0; |
| |
| } else { |
| #if (HAVE_LOWAT_EVENT) |
| if (flags & NGX_LOWAT_EVENT) { |
| change_list[nchanges].fflags = NOTE_LOWAT; |
| change_list[nchanges].data = ev->available; |
| |
| } else { |
| change_list[nchanges].fflags = 0; |
| change_list[nchanges].data = 0; |
| } |
| #else |
| change_list[nchanges].fflags = 0; |
| change_list[nchanges].data = 0; |
| #endif |
| } |
| |
| ev->index = nchanges; |
| |
| nchanges++; |
| |
| return NGX_OK; |
| } |
| |
| |
| static int ngx_kqueue_process_events(ngx_log_t *log) |
| { |
| ngx_int_t events, instance, i; |
| ngx_err_t err; |
| ngx_msec_t timer; |
| ngx_event_t *ev; |
| ngx_epoch_msec_t delta; |
| struct timeval tv; |
| struct timespec ts, *tp; |
| |
| timer = ngx_event_find_timer(); |
| ngx_old_elapsed_msec = ngx_elapsed_msec; |
| |
| if (timer) { |
| ts.tv_sec = timer / 1000; |
| ts.tv_nsec = (timer % 1000) * 1000000; |
| tp = &ts; |
| |
| #if 0 |
| ngx_gettimeofday(&tv); |
| delta = tv.tv_sec * 1000 + tv.tv_usec / 1000; |
| #endif |
| |
| } else { |
| delta = 0; |
| tp = NULL; |
| } |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0, "kevent timer: %d", timer); |
| |
| events = kevent(ngx_kqueue, change_list, nchanges, event_list, nevents, tp); |
| |
| if (events == -1) { |
| err = ngx_errno; |
| } else { |
| err = 0; |
| } |
| |
| nchanges = 0; |
| |
| ngx_gettimeofday(&tv); |
| |
| #if 1 |
| delta = ngx_elapsed_msec; |
| #endif |
| ngx_elapsed_msec = tv.tv_sec * 1000 + tv.tv_usec / 1000 - ngx_start_msec; |
| |
| ngx_time_update(tv.tv_sec); |
| |
| if (timer) { |
| delta = ngx_elapsed_msec - delta; |
| |
| } else { |
| if (events == 0) { |
| ngx_log_error(NGX_LOG_ALERT, log, 0, |
| "kevent() returned no events without timeout"); |
| return NGX_ERROR; |
| } |
| } |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, log, 0, |
| "kevent timer: %d, delta: %d", timer, (int) delta); |
| |
| if (err) { |
| ngx_log_error((err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT, |
| log, err, "kevent() failed"); |
| return NGX_ERROR; |
| } |
| |
| for (i = 0; i < events; i++) { |
| |
| ngx_log_debug6(NGX_LOG_DEBUG_EVENT, log, 0, |
| |
| (event_list[i].ident > 0x8000000 |
| && event_list[i].ident != (unsigned) -1) ? |
| "kevent: " PTR_FMT ": ft:%d fl:%04X ff:%08X d:%d ud:" |
| PTR_FMT: |
| "kevent: %d: ft:%d fl:%04X ff:%08X d:%d ud:" PTR_FMT, |
| |
| event_list[i].ident, event_list[i].filter, |
| event_list[i].flags, event_list[i].fflags, |
| event_list[i].data, event_list[i].udata); |
| |
| if (event_list[i].flags & EV_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, log, event_list[i].data, |
| "kevent() error on %d", event_list[i].ident); |
| continue; |
| } |
| |
| ev = (ngx_event_t *) event_list[i].udata; |
| |
| switch (event_list[i].filter) { |
| |
| case EVFILT_READ: |
| case EVFILT_WRITE: |
| |
| instance = (uintptr_t) ev & 1; |
| ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1); |
| |
| if (ev->active == 0 || ev->instance != instance) { |
| |
| /* |
| * it's a stale event from a file descriptor |
| * that was just closed in this iteration |
| */ |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0, |
| "kevent: stale event " PTR_FMT, ev); |
| continue; |
| } |
| |
| ev->available = event_list[i].data; |
| |
| if (event_list[i].flags & EV_EOF) { |
| ev->kq_eof = 1; |
| ev->kq_errno = event_list[i].fflags; |
| } |
| |
| if (ev->oneshot && ev->timer_set) { |
| ngx_del_timer(ev); |
| } |
| |
| ev->ready = 1; |
| |
| ev->event_handler(ev); |
| |
| break; |
| |
| case EVFILT_VNODE: |
| ev->kq_vnode = 1; |
| |
| ev->event_handler(ev); |
| |
| break; |
| |
| case EVFILT_AIO: |
| ev->complete = 1; |
| ev->ready = 1; |
| |
| ev->event_handler(ev); |
| |
| break; |
| |
| |
| default: |
| ngx_log_error(NGX_LOG_ALERT, log, 0, |
| "unexpected kevent() filter %d", |
| event_list[i].filter); |
| } |
| } |
| |
| if (timer && delta) { |
| ngx_event_expire_timers((ngx_msec_t) delta); |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| #if 0 |
| |
| static void ngx_kqueue_thread_handler(ngx_event_t *ev, ngx_log_t *log) |
| { |
| ngx_int_t instance; |
| |
| instance = (uintptr_t) ev & 1; |
| ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1); |
| |
| if (ev->active && ev->instance == instance) { |
| ev->event_handler(ev); |
| return; |
| } |
| |
| /* |
| * it's a stale event from a file descriptor |
| * that was just closed in this iteration |
| */ |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0, |
| "kevent: stale event " PTR_FMT, ev); |
| |
| } |
| |
| #endif |
| |
| |
| static void *ngx_kqueue_create_conf(ngx_cycle_t *cycle) |
| { |
| ngx_kqueue_conf_t *kcf; |
| |
| ngx_test_null(kcf, ngx_palloc(cycle->pool, sizeof(ngx_kqueue_conf_t)), |
| NGX_CONF_ERROR); |
| |
| kcf->changes = NGX_CONF_UNSET; |
| kcf->events = NGX_CONF_UNSET; |
| |
| return kcf; |
| } |
| |
| |
| static char *ngx_kqueue_init_conf(ngx_cycle_t *cycle, void *conf) |
| { |
| ngx_kqueue_conf_t *kcf = conf; |
| |
| ngx_conf_init_value(kcf->changes, 512); |
| ngx_conf_init_value(kcf->events, 512); |
| |
| return NGX_CONF_OK; |
| } |
