Mercurial > hg > nginx
view src/event/modules/ngx_aio_module.c @ 6339:67422a0a8ed2 stable-1.8
Events: made a failure to create a notification channel non-fatal.
This may happen if eventfd() returns ENOSYS, notably seen on CentOS 5.4.
Such a failure will now just disable the notification mechanism and let
the callers cope with it, instead of failing to start worker processes.
If thread pools are not configured, this can safely be ignored.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Wed, 06 May 2015 17:04:00 +0300 |
parents | 4652f8f26b12 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> extern ngx_event_module_t ngx_kqueue_module_ctx; static ngx_int_t ngx_aio_init(ngx_cycle_t *cycle, ngx_msec_t timer); static void ngx_aio_done(ngx_cycle_t *cycle); static ngx_int_t ngx_aio_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags); static ngx_int_t ngx_aio_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags); static ngx_int_t ngx_aio_del_connection(ngx_connection_t *c, ngx_uint_t flags); static ngx_int_t ngx_aio_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags); ngx_os_io_t ngx_os_aio = { ngx_aio_read, ngx_aio_read_chain, NULL, ngx_aio_write, ngx_aio_write_chain, 0 }; static ngx_str_t aio_name = ngx_string("aio"); ngx_event_module_t ngx_aio_module_ctx = { &aio_name, NULL, /* create configuration */ NULL, /* init configuration */ { ngx_aio_add_event, /* add an event */ ngx_aio_del_event, /* delete an event */ NULL, /* enable an event */ NULL, /* disable an event */ NULL, /* add an connection */ ngx_aio_del_connection, /* delete an connection */ NULL, /* trigger a notify */ ngx_aio_process_events, /* process the events */ ngx_aio_init, /* init the events */ ngx_aio_done /* done the events */ } }; ngx_module_t ngx_aio_module = { NGX_MODULE_V1, &ngx_aio_module_ctx, /* module context */ NULL, /* 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_KQUEUE) static ngx_int_t ngx_aio_init(ngx_cycle_t *cycle, ngx_msec_t timer) { if (ngx_kqueue_module_ctx.actions.init(cycle, timer) == NGX_ERROR) { return NGX_ERROR; } ngx_io = ngx_os_aio; ngx_event_flags = NGX_USE_AIO_EVENT; ngx_event_actions = ngx_aio_module_ctx.actions; return NGX_OK; } static void ngx_aio_done(ngx_cycle_t *cycle) { ngx_kqueue_module_ctx.actions.done(cycle); } /* the event adding and deleting are needed for the listening sockets */ static ngx_int_t ngx_aio_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) { return ngx_kqueue_module_ctx.actions.add(ev, event, flags); } static ngx_int_t ngx_aio_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) { return ngx_kqueue_module_ctx.actions.del(ev, event, flags); } static ngx_int_t ngx_aio_del_connection(ngx_connection_t *c, ngx_uint_t flags) { int rc; if (c->read->active == 0 && c->write->active == 0) { return NGX_OK; } if (flags & NGX_CLOSE_EVENT) { return NGX_OK; } rc = aio_cancel(c->fd, NULL); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_cancel: %d", rc); if (rc == AIO_CANCELED) { c->read->active = 0; c->write->active = 0; return NGX_OK; } if (rc == AIO_ALLDONE) { c->read->active = 0; c->write->active = 0; ngx_log_error(NGX_LOG_ALERT, c->log, 0, "aio_cancel() returned AIO_ALLDONE"); return NGX_OK; } if (rc == -1) { ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "aio_cancel() failed"); return NGX_ERROR; } if (rc == AIO_NOTCANCELED) { ngx_log_error(NGX_LOG_ALERT, c->log, 0, "aio_cancel() returned AIO_NOTCANCELED"); return NGX_ERROR; } return NGX_OK; } static ngx_int_t ngx_aio_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags) { return ngx_kqueue_module_ctx.actions.process_events(cycle, timer, flags); } #endif /* NGX_HAVE_KQUEUE */