Mercurial > hg > nginx
view src/event/modules/ngx_epoll_module.c @ 7732:59e1c73fe02b
SSL: ssl_reject_handshake directive (ticket #195).
In some cases it might be needed to reject SSL handshake based on SNI
server name provided, for example, to make sure an invalid certificate
is not returned to clients trying to contact a name-based virtual server
without SSL configured. Previously, a "ssl_ciphers aNULL;" was used for
this. This workaround, however, is not compatible with TLSv1.3, in
particular, when using BoringSSL, where it is not possible to configure
TLSv1.3 ciphers at all.
With this change, the ssl_reject_handshake directive is introduced,
which instructs nginx to reject SSL handshakes with an "unrecognized_name"
alert in a particular server block.
For example, to reject handshake with names other than example.com,
one can use the following configuration:
server {
listen 443 ssl;
ssl_reject_handshake on;
}
server {
listen 443 ssl;
server_name example.com;
ssl_certificate example.com.crt;
ssl_certificate_key example.com.key;
}
The following configuration can be used to reject all SSL handshakes
without SNI server name provided:
server {
listen 443 ssl;
ssl_reject_handshake on;
}
server {
listen 443 ssl;
server_name ~^;
ssl_certificate example.crt;
ssl_certificate_key example.key;
}
Additionally, the ssl_reject_handshake directive makes configuring
certificates for the default server block optional. If no certificates
are configured in the default server for a given listening socket,
certificates must be defined in all non-default server blocks with
the listening socket in question.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 22 Oct 2020 18:02:28 +0300 |
parents | efd71d49bde0 |
children |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #if (NGX_TEST_BUILD_EPOLL) /* epoll declarations */ #define EPOLLIN 0x001 #define EPOLLPRI 0x002 #define EPOLLOUT 0x004 #define EPOLLERR 0x008 #define EPOLLHUP 0x010 #define EPOLLRDNORM 0x040 #define EPOLLRDBAND 0x080 #define EPOLLWRNORM 0x100 #define EPOLLWRBAND 0x200 #define EPOLLMSG 0x400 #define EPOLLRDHUP 0x2000 #define EPOLLEXCLUSIVE 0x10000000 #define EPOLLONESHOT 0x40000000 #define EPOLLET 0x80000000 #define EPOLL_CTL_ADD 1 #define EPOLL_CTL_DEL 2 #define EPOLL_CTL_MOD 3 typedef union epoll_data { void *ptr; int fd; uint32_t u32; uint64_t u64; } epoll_data_t; struct epoll_event { uint32_t events; epoll_data_t data; }; int epoll_create(int size); int epoll_create(int size) { return -1; } int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event); int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event) { return -1; } int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout); int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout) { return -1; } #if (NGX_HAVE_EVENTFD) #define SYS_eventfd 323 #endif #if (NGX_HAVE_FILE_AIO) #define SYS_io_setup 245 #define SYS_io_destroy 246 #define SYS_io_getevents 247 typedef u_int aio_context_t; struct io_event { uint64_t data; /* the data field from the iocb */ uint64_t obj; /* what iocb this event came from */ int64_t res; /* result code for this event */ int64_t res2; /* secondary result */ }; #endif #endif /* NGX_TEST_BUILD_EPOLL */ typedef struct { ngx_uint_t events; ngx_uint_t aio_requests; } ngx_epoll_conf_t; static ngx_int_t ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer); #if (NGX_HAVE_EVENTFD) static ngx_int_t ngx_epoll_notify_init(ngx_log_t *log); static void ngx_epoll_notify_handler(ngx_event_t *ev); #endif #if (NGX_HAVE_EPOLLRDHUP) static void ngx_epoll_test_rdhup(ngx_cycle_t *cycle); #endif static void ngx_epoll_done(ngx_cycle_t *cycle); static ngx_int_t ngx_epoll_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags); static ngx_int_t ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags); static ngx_int_t ngx_epoll_add_connection(ngx_connection_t *c); static ngx_int_t ngx_epoll_del_connection(ngx_connection_t *c, ngx_uint_t flags); #if (NGX_HAVE_EVENTFD) static ngx_int_t ngx_epoll_notify(ngx_event_handler_pt handler); #endif static ngx_int_t ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags); #if (NGX_HAVE_FILE_AIO) static void ngx_epoll_eventfd_handler(ngx_event_t *ev); #endif static void *ngx_epoll_create_conf(ngx_cycle_t *cycle); static char *ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf); static int ep = -1; static struct epoll_event *event_list; static ngx_uint_t nevents; #if (NGX_HAVE_EVENTFD) static int notify_fd = -1; static ngx_event_t notify_event; static ngx_connection_t notify_conn; #endif #if (NGX_HAVE_FILE_AIO) int ngx_eventfd = -1; aio_context_t ngx_aio_ctx = 0; static ngx_event_t ngx_eventfd_event; static ngx_connection_t ngx_eventfd_conn; #endif #if (NGX_HAVE_EPOLLRDHUP) ngx_uint_t ngx_use_epoll_rdhup; #endif static ngx_str_t epoll_name = ngx_string("epoll"); static ngx_command_t ngx_epoll_commands[] = { { ngx_string("epoll_events"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, 0, offsetof(ngx_epoll_conf_t, events), NULL }, { ngx_string("worker_aio_requests"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, 0, offsetof(ngx_epoll_conf_t, aio_requests), NULL }, ngx_null_command }; static ngx_event_module_t ngx_epoll_module_ctx = { &epoll_name, ngx_epoll_create_conf, /* create configuration */ ngx_epoll_init_conf, /* init configuration */ { ngx_epoll_add_event, /* add an event */ ngx_epoll_del_event, /* delete an event */ ngx_epoll_add_event, /* enable an event */ ngx_epoll_del_event, /* disable an event */ ngx_epoll_add_connection, /* add an connection */ ngx_epoll_del_connection, /* delete an connection */ #if (NGX_HAVE_EVENTFD) ngx_epoll_notify, /* trigger a notify */ #else NULL, /* trigger a notify */ #endif ngx_epoll_process_events, /* process the events */ ngx_epoll_init, /* init the events */ ngx_epoll_done, /* done the events */ } }; ngx_module_t ngx_epoll_module = { NGX_MODULE_V1, &ngx_epoll_module_ctx, /* module context */ ngx_epoll_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 }; #if (NGX_HAVE_FILE_AIO) /* * We call io_setup(), io_destroy() io_submit(), and io_getevents() directly * as syscalls instead of libaio usage, because the library header file * supports eventfd() since 0.3.107 version only. */ static int io_setup(u_int nr_reqs, aio_context_t *ctx) { return syscall(SYS_io_setup, nr_reqs, ctx); } static int io_destroy(aio_context_t ctx) { return syscall(SYS_io_destroy, ctx); } static int io_getevents(aio_context_t ctx, long min_nr, long nr, struct io_event *events, struct timespec *tmo) { return syscall(SYS_io_getevents, ctx, min_nr, nr, events, tmo); } static void ngx_epoll_aio_init(ngx_cycle_t *cycle, ngx_epoll_conf_t *epcf) { int n; struct epoll_event ee; #if (NGX_HAVE_SYS_EVENTFD_H) ngx_eventfd = eventfd(0, 0); #else ngx_eventfd = syscall(SYS_eventfd, 0); #endif if (ngx_eventfd == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "eventfd() failed"); ngx_file_aio = 0; return; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "eventfd: %d", ngx_eventfd); n = 1; if (ioctl(ngx_eventfd, FIONBIO, &n) == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "ioctl(eventfd, FIONBIO) failed"); goto failed; } if (io_setup(epcf->aio_requests, &ngx_aio_ctx) == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "io_setup() failed"); goto failed; } ngx_eventfd_event.data = &ngx_eventfd_conn; ngx_eventfd_event.handler = ngx_epoll_eventfd_handler; ngx_eventfd_event.log = cycle->log; ngx_eventfd_event.active = 1; ngx_eventfd_conn.fd = ngx_eventfd; ngx_eventfd_conn.read = &ngx_eventfd_event; ngx_eventfd_conn.log = cycle->log; ee.events = EPOLLIN|EPOLLET; ee.data.ptr = &ngx_eventfd_conn; if (epoll_ctl(ep, EPOLL_CTL_ADD, ngx_eventfd, &ee) != -1) { return; } ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "epoll_ctl(EPOLL_CTL_ADD, eventfd) failed"); if (io_destroy(ngx_aio_ctx) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "io_destroy() failed"); } failed: if (close(ngx_eventfd) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "eventfd close() failed"); } ngx_eventfd = -1; ngx_aio_ctx = 0; ngx_file_aio = 0; } #endif static ngx_int_t ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer) { ngx_epoll_conf_t *epcf; epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_epoll_module); if (ep == -1) { ep = epoll_create(cycle->connection_n / 2); if (ep == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "epoll_create() failed"); return NGX_ERROR; } #if (NGX_HAVE_EVENTFD) if (ngx_epoll_notify_init(cycle->log) != NGX_OK) { ngx_epoll_module_ctx.actions.notify = NULL; } #endif #if (NGX_HAVE_FILE_AIO) ngx_epoll_aio_init(cycle, epcf); #endif #if (NGX_HAVE_EPOLLRDHUP) ngx_epoll_test_rdhup(cycle); #endif } if (nevents < epcf->events) { if (event_list) { ngx_free(event_list); } event_list = ngx_alloc(sizeof(struct epoll_event) * epcf->events, cycle->log); if (event_list == NULL) { return NGX_ERROR; } } nevents = epcf->events; ngx_io = ngx_os_io; ngx_event_actions = ngx_epoll_module_ctx.actions; #if (NGX_HAVE_CLEAR_EVENT) ngx_event_flags = NGX_USE_CLEAR_EVENT #else ngx_event_flags = NGX_USE_LEVEL_EVENT #endif |NGX_USE_GREEDY_EVENT |NGX_USE_EPOLL_EVENT; return NGX_OK; } #if (NGX_HAVE_EVENTFD) static ngx_int_t ngx_epoll_notify_init(ngx_log_t *log) { struct epoll_event ee; #if (NGX_HAVE_SYS_EVENTFD_H) notify_fd = eventfd(0, 0); #else notify_fd = syscall(SYS_eventfd, 0); #endif if (notify_fd == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "eventfd() failed"); return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0, "notify eventfd: %d", notify_fd); notify_event.handler = ngx_epoll_notify_handler; notify_event.log = log; notify_event.active = 1; notify_conn.fd = notify_fd; notify_conn.read = ¬ify_event; notify_conn.log = log; ee.events = EPOLLIN|EPOLLET; ee.data.ptr = ¬ify_conn; if (epoll_ctl(ep, EPOLL_CTL_ADD, notify_fd, &ee) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "epoll_ctl(EPOLL_CTL_ADD, eventfd) failed"); if (close(notify_fd) == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "eventfd close() failed"); } return NGX_ERROR; } return NGX_OK; } static void ngx_epoll_notify_handler(ngx_event_t *ev) { ssize_t n; uint64_t count; ngx_err_t err; ngx_event_handler_pt handler; if (++ev->index == NGX_MAX_UINT32_VALUE) { ev->index = 0; n = read(notify_fd, &count, sizeof(uint64_t)); err = ngx_errno; ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, "read() eventfd %d: %z count:%uL", notify_fd, n, count); if ((size_t) n != sizeof(uint64_t)) { ngx_log_error(NGX_LOG_ALERT, ev->log, err, "read() eventfd %d failed", notify_fd); } } handler = ev->data; handler(ev); } #endif #if (NGX_HAVE_EPOLLRDHUP) static void ngx_epoll_test_rdhup(ngx_cycle_t *cycle) { int s[2], events; struct epoll_event ee; if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "socketpair() failed"); return; } ee.events = EPOLLET|EPOLLIN|EPOLLRDHUP; if (epoll_ctl(ep, EPOLL_CTL_ADD, s[0], &ee) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "epoll_ctl() failed"); goto failed; } if (close(s[1]) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "close() failed"); s[1] = -1; goto failed; } s[1] = -1; events = epoll_wait(ep, &ee, 1, 5000); if (events == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "epoll_wait() failed"); goto failed; } if (events) { ngx_use_epoll_rdhup = ee.events & EPOLLRDHUP; } else { ngx_log_error(NGX_LOG_ALERT, cycle->log, NGX_ETIMEDOUT, "epoll_wait() timed out"); } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "testing the EPOLLRDHUP flag: %s", ngx_use_epoll_rdhup ? "success" : "fail"); failed: if (s[1] != -1 && close(s[1]) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "close() failed"); } if (close(s[0]) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "close() failed"); } } #endif static void ngx_epoll_done(ngx_cycle_t *cycle) { if (close(ep) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "epoll close() failed"); } ep = -1; #if (NGX_HAVE_EVENTFD) if (close(notify_fd) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "eventfd close() failed"); } notify_fd = -1; #endif #if (NGX_HAVE_FILE_AIO) if (ngx_eventfd != -1) { if (io_destroy(ngx_aio_ctx) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "io_destroy() failed"); } if (close(ngx_eventfd) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "eventfd close() failed"); } ngx_eventfd = -1; } ngx_aio_ctx = 0; #endif ngx_free(event_list); event_list = NULL; nevents = 0; } static ngx_int_t ngx_epoll_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) { int op; uint32_t events, prev; ngx_event_t *e; ngx_connection_t *c; struct epoll_event ee; c = ev->data; events = (uint32_t) event; if (event == NGX_READ_EVENT) { e = c->write; prev = EPOLLOUT; #if (NGX_READ_EVENT != EPOLLIN|EPOLLRDHUP) events = EPOLLIN|EPOLLRDHUP; #endif } else { e = c->read; prev = EPOLLIN|EPOLLRDHUP; #if (NGX_WRITE_EVENT != EPOLLOUT) events = EPOLLOUT; #endif } if (e->active) { op = EPOLL_CTL_MOD; events |= prev; } else { op = EPOLL_CTL_ADD; } #if (NGX_HAVE_EPOLLEXCLUSIVE && NGX_HAVE_EPOLLRDHUP) if (flags & NGX_EXCLUSIVE_EVENT) { events &= ~EPOLLRDHUP; } #endif ee.events = events | (uint32_t) flags; ee.data.ptr = (void *) ((uintptr_t) c | ev->instance); ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, "epoll add event: fd:%d op:%d ev:%08XD", c->fd, op, ee.events); if (epoll_ctl(ep, op, c->fd, &ee) == -1) { ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "epoll_ctl(%d, %d) failed", op, c->fd); return NGX_ERROR; } ev->active = 1; #if 0 ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0; #endif return NGX_OK; } static ngx_int_t ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) { int op; uint32_t prev; ngx_event_t *e; ngx_connection_t *c; struct epoll_event ee; /* * when the file descriptor is closed, the epoll automatically deletes * it from its queue, so we do not need to delete explicitly the event * before the closing the file descriptor */ if (flags & NGX_CLOSE_EVENT) { ev->active = 0; return NGX_OK; } c = ev->data; if (event == NGX_READ_EVENT) { e = c->write; prev = EPOLLOUT; } else { e = c->read; prev = EPOLLIN|EPOLLRDHUP; } if (e->active) { op = EPOLL_CTL_MOD; ee.events = prev | (uint32_t) flags; ee.data.ptr = (void *) ((uintptr_t) c | ev->instance); } else { op = EPOLL_CTL_DEL; ee.events = 0; ee.data.ptr = NULL; } ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, "epoll del event: fd:%d op:%d ev:%08XD", c->fd, op, ee.events); if (epoll_ctl(ep, op, c->fd, &ee) == -1) { ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "epoll_ctl(%d, %d) failed", op, c->fd); return NGX_ERROR; } ev->active = 0; return NGX_OK; } static ngx_int_t ngx_epoll_add_connection(ngx_connection_t *c) { struct epoll_event ee; ee.events = EPOLLIN|EPOLLOUT|EPOLLET|EPOLLRDHUP; ee.data.ptr = (void *) ((uintptr_t) c | c->read->instance); ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, "epoll add connection: fd:%d ev:%08XD", c->fd, ee.events); if (epoll_ctl(ep, EPOLL_CTL_ADD, c->fd, &ee) == -1) { ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "epoll_ctl(EPOLL_CTL_ADD, %d) failed", c->fd); return NGX_ERROR; } c->read->active = 1; c->write->active = 1; return NGX_OK; } static ngx_int_t ngx_epoll_del_connection(ngx_connection_t *c, ngx_uint_t flags) { int op; struct epoll_event ee; /* * when the file descriptor is closed the epoll automatically deletes * it from its queue so we do not need to delete explicitly the event * before the closing the file descriptor */ if (flags & NGX_CLOSE_EVENT) { c->read->active = 0; c->write->active = 0; return NGX_OK; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "epoll del connection: fd:%d", c->fd); op = EPOLL_CTL_DEL; ee.events = 0; ee.data.ptr = NULL; if (epoll_ctl(ep, op, c->fd, &ee) == -1) { ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "epoll_ctl(%d, %d) failed", op, c->fd); return NGX_ERROR; } c->read->active = 0; c->write->active = 0; return NGX_OK; } #if (NGX_HAVE_EVENTFD) static ngx_int_t ngx_epoll_notify(ngx_event_handler_pt handler) { static uint64_t inc = 1; notify_event.data = handler; if ((size_t) write(notify_fd, &inc, sizeof(uint64_t)) != sizeof(uint64_t)) { ngx_log_error(NGX_LOG_ALERT, notify_event.log, ngx_errno, "write() to eventfd %d failed", notify_fd); return NGX_ERROR; } return NGX_OK; } #endif static ngx_int_t ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags) { int events; uint32_t revents; ngx_int_t instance, i; ngx_uint_t level; ngx_err_t err; ngx_event_t *rev, *wev; ngx_queue_t *queue; ngx_connection_t *c; /* NGX_TIMER_INFINITE == INFTIM */ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "epoll timer: %M", timer); events = epoll_wait(ep, event_list, (int) nevents, timer); err = (events == -1) ? ngx_errno : 0; if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) { ngx_time_update(); } 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, "epoll_wait() failed"); return NGX_ERROR; } if (events == 0) { if (timer != NGX_TIMER_INFINITE) { return NGX_OK; } ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "epoll_wait() returned no events without timeout"); return NGX_ERROR; } for (i = 0; i < events; i++) { c = event_list[i].data.ptr; instance = (uintptr_t) c & 1; c = (ngx_connection_t *) ((uintptr_t) c & (uintptr_t) ~1); rev = c->read; if (c->fd == -1 || rev->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, "epoll: stale event %p", c); continue; } revents = event_list[i].events; ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "epoll: fd:%d ev:%04XD d:%p", c->fd, revents, event_list[i].data.ptr); if (revents & (EPOLLERR|EPOLLHUP)) { ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "epoll_wait() error on fd:%d ev:%04XD", c->fd, revents); /* * if the error events were returned, add EPOLLIN and EPOLLOUT * to handle the events at least in one active handler */ revents |= EPOLLIN|EPOLLOUT; } #if 0 if (revents & ~(EPOLLIN|EPOLLOUT|EPOLLERR|EPOLLHUP)) { ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "strange epoll_wait() events fd:%d ev:%04XD", c->fd, revents); } #endif if ((revents & EPOLLIN) && rev->active) { #if (NGX_HAVE_EPOLLRDHUP) if (revents & EPOLLRDHUP) { rev->pending_eof = 1; } #endif rev->ready = 1; rev->available = -1; if (flags & NGX_POST_EVENTS) { queue = rev->accept ? &ngx_posted_accept_events : &ngx_posted_events; ngx_post_event(rev, queue); } else { rev->handler(rev); } } wev = c->write; if ((revents & EPOLLOUT) && wev->active) { if (c->fd == -1 || wev->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, "epoll: stale event %p", c); continue; } wev->ready = 1; #if (NGX_THREADS) wev->complete = 1; #endif if (flags & NGX_POST_EVENTS) { ngx_post_event(wev, &ngx_posted_events); } else { wev->handler(wev); } } } return NGX_OK; } #if (NGX_HAVE_FILE_AIO) static void ngx_epoll_eventfd_handler(ngx_event_t *ev) { int n, events; long i; uint64_t ready; ngx_err_t err; ngx_event_t *e; ngx_event_aio_t *aio; struct io_event event[64]; struct timespec ts; ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd handler"); n = read(ngx_eventfd, &ready, 8); err = ngx_errno; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd: %d", n); if (n != 8) { if (n == -1) { if (err == NGX_EAGAIN) { return; } ngx_log_error(NGX_LOG_ALERT, ev->log, err, "read(eventfd) failed"); return; } ngx_log_error(NGX_LOG_ALERT, ev->log, 0, "read(eventfd) returned only %d bytes", n); return; } ts.tv_sec = 0; ts.tv_nsec = 0; while (ready) { events = io_getevents(ngx_aio_ctx, 1, 64, event, &ts); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, "io_getevents: %d", events); if (events > 0) { ready -= events; for (i = 0; i < events; i++) { ngx_log_debug4(NGX_LOG_DEBUG_EVENT, ev->log, 0, "io_event: %XL %XL %L %L", event[i].data, event[i].obj, event[i].res, event[i].res2); e = (ngx_event_t *) (uintptr_t) event[i].data; e->complete = 1; e->active = 0; e->ready = 1; aio = e->data; aio->res = event[i].res; ngx_post_event(e, &ngx_posted_events); } continue; } if (events == 0) { return; } /* events == -1 */ ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "io_getevents() failed"); return; } } #endif static void * ngx_epoll_create_conf(ngx_cycle_t *cycle) { ngx_epoll_conf_t *epcf; epcf = ngx_palloc(cycle->pool, sizeof(ngx_epoll_conf_t)); if (epcf == NULL) { return NULL; } epcf->events = NGX_CONF_UNSET; epcf->aio_requests = NGX_CONF_UNSET; return epcf; } static char * ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf) { ngx_epoll_conf_t *epcf = conf; ngx_conf_init_uint_value(epcf->events, 512); ngx_conf_init_uint_value(epcf->aio_requests, 32); return NGX_CONF_OK; }