| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| |
| |
| typedef struct { |
| ngx_uint_t changes; |
| ngx_uint_t events; |
| } ngx_kqueue_conf_t; |
| |
| |
| static ngx_int_t ngx_kqueue_init(ngx_cycle_t *cycle, ngx_msec_t timer); |
| #ifdef EVFILT_USER |
| static ngx_int_t ngx_kqueue_notify_init(ngx_log_t *log); |
| #endif |
| static void ngx_kqueue_done(ngx_cycle_t *cycle); |
| static ngx_int_t ngx_kqueue_add_event(ngx_event_t *ev, ngx_int_t event, |
| ngx_uint_t flags); |
| static ngx_int_t ngx_kqueue_del_event(ngx_event_t *ev, ngx_int_t event, |
| ngx_uint_t flags); |
| static ngx_int_t ngx_kqueue_set_event(ngx_event_t *ev, ngx_int_t filter, |
| ngx_uint_t flags); |
| #ifdef EVFILT_USER |
| static ngx_int_t ngx_kqueue_notify(ngx_event_handler_pt handler); |
| #endif |
| static ngx_int_t ngx_kqueue_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, |
| ngx_uint_t flags); |
| static ngx_inline void ngx_kqueue_dump_event(ngx_log_t *log, |
| struct kevent *kev); |
| |
| 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; |
| static struct kevent *event_list; |
| static ngx_uint_t max_changes, nchanges, nevents; |
| |
| #ifdef EVFILT_USER |
| static ngx_event_t notify_event; |
| static struct kevent notify_kev; |
| #endif |
| |
| |
| 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 |
| }; |
| |
| |
| static 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 */ |
| #ifdef EVFILT_USER |
| ngx_kqueue_notify, /* trigger a notify */ |
| #else |
| NULL, /* trigger a notify */ |
| #endif |
| 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_V1, |
| &ngx_kqueue_module_ctx, /* module context */ |
| ngx_kqueue_commands, /* module directives */ |
| NGX_EVENT_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_int_t |
| ngx_kqueue_init(ngx_cycle_t *cycle, ngx_msec_t timer) |
| { |
| ngx_kqueue_conf_t *kcf; |
| struct timespec ts; |
| #if (NGX_HAVE_TIMER_EVENT) |
| struct kevent kev; |
| #endif |
| |
| 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; |
| } |
| |
| #ifdef EVFILT_USER |
| if (ngx_kqueue_notify_init(cycle->log) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| #endif |
| } |
| |
| if (max_changes < kcf->changes) { |
| if (nchanges) { |
| ts.tv_sec = 0; |
| ts.tv_nsec = 0; |
| |
| if (kevent(ngx_kqueue, change_list, (int) 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; |
| } |
| } |
| |
| ngx_event_flags = NGX_USE_ONESHOT_EVENT |
| |NGX_USE_KQUEUE_EVENT |
| |NGX_USE_VNODE_EVENT; |
| |
| #if (NGX_HAVE_TIMER_EVENT) |
| |
| if (timer) { |
| kev.ident = 0; |
| kev.filter = EVFILT_TIMER; |
| kev.flags = EV_ADD|EV_ENABLE; |
| kev.fflags = 0; |
| kev.data = timer; |
| kev.udata = 0; |
| |
| ts.tv_sec = 0; |
| ts.tv_nsec = 0; |
| |
| if (kevent(ngx_kqueue, &kev, 1, NULL, 0, &ts) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "kevent(EVFILT_TIMER) failed"); |
| return NGX_ERROR; |
| } |
| |
| ngx_event_flags |= NGX_USE_TIMER_EVENT; |
| } |
| |
| #endif |
| |
| #if (NGX_HAVE_CLEAR_EVENT) |
| ngx_event_flags |= NGX_USE_CLEAR_EVENT; |
| #else |
| ngx_event_flags |= NGX_USE_LEVEL_EVENT; |
| #endif |
| |
| #if (NGX_HAVE_LOWAT_EVENT) |
| ngx_event_flags |= NGX_USE_LOWAT_EVENT; |
| #endif |
| |
| nevents = kcf->events; |
| |
| ngx_io = ngx_os_io; |
| |
| ngx_event_actions = ngx_kqueue_module_ctx.actions; |
| |
| return NGX_OK; |
| } |
| |
| |
| #ifdef EVFILT_USER |
| |
| static ngx_int_t |
| ngx_kqueue_notify_init(ngx_log_t *log) |
| { |
| notify_kev.ident = 0; |
| notify_kev.filter = EVFILT_USER; |
| notify_kev.data = 0; |
| notify_kev.flags = EV_ADD|EV_CLEAR; |
| notify_kev.fflags = 0; |
| notify_kev.udata = 0; |
| |
| if (kevent(ngx_kqueue, ¬ify_kev, 1, NULL, 0, NULL) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
| "kevent(EVFILT_USER, EV_ADD) failed"); |
| return NGX_ERROR; |
| } |
| |
| notify_event.active = 1; |
| notify_event.log = log; |
| |
| notify_kev.flags = 0; |
| notify_kev.fflags = NOTE_TRIGGER; |
| notify_kev.udata = NGX_KQUEUE_UDATA_T ((uintptr_t) ¬ify_event); |
| |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| |
| 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 ngx_int_t |
| ngx_kqueue_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
| { |
| ngx_int_t rc; |
| #if 0 |
| ngx_event_t *e; |
| ngx_connection_t *c; |
| #endif |
| |
| ev->active = 1; |
| ev->disabled = 0; |
| ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0; |
| |
| #if 0 |
| |
| if (ev->index < 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:%i", |
| ngx_event_ident(ev->data), event); |
| |
| if (ev->index < --nchanges) { |
| e = (ngx_event_t *) |
| ((uintptr_t) change_list[nchanges].udata & (uintptr_t) ~1); |
| 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; |
| } |
| |
| #endif |
| |
| rc = ngx_kqueue_set_event(ev, event, EV_ADD|EV_ENABLE|flags); |
| |
| return rc; |
| } |
| |
| |
| static ngx_int_t |
| ngx_kqueue_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
| { |
| ngx_int_t rc; |
| ngx_event_t *e; |
| |
| ev->active = 0; |
| ev->disabled = 0; |
| |
| if (ev->index < 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:%i", |
| ngx_event_ident(ev->data), event); |
| |
| /* if the event is still not passed to a kernel we will not pass it */ |
| |
| nchanges--; |
| |
| if (ev->index < nchanges) { |
| e = (ngx_event_t *) |
| ((uintptr_t) change_list[nchanges].udata & (uintptr_t) ~1); |
| change_list[ev->index] = change_list[nchanges]; |
| e->index = ev->index; |
| } |
| |
| return NGX_OK; |
| } |
| |
| /* |
| * when the file descriptor is closed the kqueue automatically deletes |
| * its filters so we do not need to delete explicitly the event |
| * before the closing the file descriptor. |
| */ |
| |
| if (flags & NGX_CLOSE_EVENT) { |
| return NGX_OK; |
| } |
| |
| if (flags & NGX_DISABLE_EVENT) { |
| ev->disabled = 1; |
| |
| } else { |
| flags |= EV_DELETE; |
| } |
| |
| rc = ngx_kqueue_set_event(ev, event, flags); |
| |
| return rc; |
| } |
| |
| |
| static ngx_int_t |
| ngx_kqueue_set_event(ngx_event_t *ev, ngx_int_t filter, ngx_uint_t flags) |
| { |
| struct kevent *kev; |
| struct timespec ts; |
| ngx_connection_t *c; |
| |
| c = ev->data; |
| |
| ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
| "kevent set event: %d: ft:%i fl:%04Xi", |
| 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, (int) nchanges, NULL, 0, &ts) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "kevent() failed"); |
| return NGX_ERROR; |
| } |
| |
| nchanges = 0; |
| } |
| |
| kev = &change_list[nchanges]; |
| |
| kev->ident = c->fd; |
| kev->filter = (short) filter; |
| kev->flags = (u_short) flags; |
| kev->udata = NGX_KQUEUE_UDATA_T ((uintptr_t) ev | ev->instance); |
| |
| if (filter == EVFILT_VNODE) { |
| kev->fflags = NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND |
| |NOTE_ATTRIB|NOTE_RENAME |
| #if (__FreeBSD__ == 4 && __FreeBSD_version >= 430000) \ |
| || __FreeBSD_version >= 500018 |
| |NOTE_REVOKE |
| #endif |
| ; |
| kev->data = 0; |
| |
| } else { |
| #if (NGX_HAVE_LOWAT_EVENT) |
| if (flags & NGX_LOWAT_EVENT) { |
| kev->fflags = NOTE_LOWAT; |
| kev->data = ev->available; |
| |
| } else { |
| kev->fflags = 0; |
| kev->data = 0; |
| } |
| #else |
| kev->fflags = 0; |
| kev->data = 0; |
| #endif |
| } |
| |
| ev->index = nchanges; |
| nchanges++; |
| |
| if (flags & NGX_FLUSH_EVENT) { |
| ts.tv_sec = 0; |
| ts.tv_nsec = 0; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "kevent flush"); |
| |
| if (kevent(ngx_kqueue, change_list, (int) nchanges, NULL, 0, &ts) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "kevent() failed"); |
| return NGX_ERROR; |
| } |
| |
| nchanges = 0; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| #ifdef EVFILT_USER |
| |
| static ngx_int_t |
| ngx_kqueue_notify(ngx_event_handler_pt handler) |
| { |
| notify_event.handler = handler; |
| |
| if (kevent(ngx_kqueue, ¬ify_kev, 1, NULL, 0, NULL) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, notify_event.log, ngx_errno, |
| "kevent(EVFILT_USER, NOTE_TRIGGER) failed"); |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| |
| static ngx_int_t |
| ngx_kqueue_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, |
| ngx_uint_t flags) |
| { |
| int events, n; |
| ngx_int_t i, instance; |
| ngx_uint_t level; |
| ngx_err_t err; |
| ngx_event_t *ev; |
| ngx_queue_t *queue; |
| struct timespec ts, *tp; |
| |
| n = (int) nchanges; |
| nchanges = 0; |
| |
| if (timer == NGX_TIMER_INFINITE) { |
| tp = NULL; |
| |
| } else { |
| |
| ts.tv_sec = timer / 1000; |
| ts.tv_nsec = (timer % 1000) * 1000000; |
| |
| /* |
| * 64-bit Darwin kernel has the bug: kernel level ts.tv_nsec is |
| * the int32_t while user level ts.tv_nsec is the long (64-bit), |
| * so on the big endian PowerPC all nanoseconds are lost. |
| */ |
| |
| #if (NGX_DARWIN_KEVENT_BUG) |
| ts.tv_nsec <<= 32; |
| #endif |
| |
| tp = &ts; |
| } |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "kevent timer: %M, changes: %d", timer, n); |
| |
| events = kevent(ngx_kqueue, change_list, n, event_list, (int) nevents, tp); |
| |
| err = (events == -1) ? ngx_errno : 0; |
| |
| if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) { |
| ngx_time_update(); |
| } |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "kevent events: %d", events); |
| |
| if (err) { |
| if (err == NGX_EINTR) { |
| |
| if (ngx_event_timer_alarm) { |
| ngx_event_timer_alarm = 0; |
| return NGX_OK; |
| } |
| |
| level = NGX_LOG_INFO; |
| |
| } else { |
| level = NGX_LOG_ALERT; |
| } |
| |
| ngx_log_error(level, cycle->log, err, "kevent() failed"); |
| return NGX_ERROR; |
| } |
| |
| if (events == 0) { |
| if (timer != NGX_TIMER_INFINITE) { |
| return NGX_OK; |
| } |
| |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
| "kevent() returned no events without timeout"); |
| return NGX_ERROR; |
| } |
| |
| for (i = 0; i < events; i++) { |
| |
| ngx_kqueue_dump_event(cycle->log, &event_list[i]); |
| |
| if (event_list[i].flags & EV_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, event_list[i].data, |
| "kevent() error on %d filter:%d flags:%04Xd", |
| (int) event_list[i].ident, event_list[i].filter, |
| event_list[i].flags); |
| continue; |
| } |
| |
| #if (NGX_HAVE_TIMER_EVENT) |
| |
| if (event_list[i].filter == EVFILT_TIMER) { |
| ngx_time_update(); |
| continue; |
| } |
| |
| #endif |
| |
| 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->closed || ev->instance != instance) { |
| |
| /* |
| * the stale event from a file descriptor |
| * that was just closed in this iteration |
| */ |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "kevent: stale event %p", ev); |
| continue; |
| } |
| |
| if (ev->log && (ev->log->log_level & NGX_LOG_DEBUG_CONNECTION)) { |
| ngx_kqueue_dump_event(ev->log, &event_list[i]); |
| } |
| |
| if (ev->oneshot) { |
| ev->active = 0; |
| } |
| |
| ev->available = event_list[i].data; |
| |
| if (event_list[i].flags & EV_EOF) { |
| ev->pending_eof = 1; |
| ev->kq_errno = event_list[i].fflags; |
| } |
| |
| ev->ready = 1; |
| |
| break; |
| |
| case EVFILT_VNODE: |
| ev->kq_vnode = 1; |
| |
| break; |
| |
| case EVFILT_AIO: |
| ev->complete = 1; |
| ev->ready = 1; |
| |
| break; |
| |
| #ifdef EVFILT_USER |
| case EVFILT_USER: |
| break; |
| #endif |
| |
| default: |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
| "unexpected kevent() filter %d", |
| event_list[i].filter); |
| continue; |
| } |
| |
| if (flags & NGX_POST_EVENTS) { |
| queue = ev->accept ? &ngx_posted_accept_events |
| : &ngx_posted_events; |
| |
| ngx_post_event(ev, queue); |
| |
| continue; |
| } |
| |
| ev->handler(ev); |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_inline void |
| ngx_kqueue_dump_event(ngx_log_t *log, struct kevent *kev) |
| { |
| if (kev->ident > 0x8000000 && kev->ident != (unsigned) -1) { |
| ngx_log_debug6(NGX_LOG_DEBUG_EVENT, log, 0, |
| "kevent: %p: ft:%d fl:%04Xd ff:%08Xd d:%d ud:%p", |
| (void *) kev->ident, kev->filter, |
| kev->flags, kev->fflags, |
| (int) kev->data, kev->udata); |
| |
| } else { |
| ngx_log_debug6(NGX_LOG_DEBUG_EVENT, log, 0, |
| "kevent: %d: ft:%d fl:%04Xd ff:%08Xd d:%d ud:%p", |
| (int) kev->ident, kev->filter, |
| kev->flags, kev->fflags, |
| (int) kev->data, kev->udata); |
| } |
| } |
| |
| |
| static void * |
| ngx_kqueue_create_conf(ngx_cycle_t *cycle) |
| { |
| ngx_kqueue_conf_t *kcf; |
| |
| kcf = ngx_palloc(cycle->pool, sizeof(ngx_kqueue_conf_t)); |
| if (kcf == NULL) { |
| return NULL; |
| } |
| |
| 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_uint_value(kcf->changes, 512); |
| ngx_conf_init_uint_value(kcf->events, 512); |
| |
| return NGX_CONF_OK; |
| } |
