diff options
Diffstat (limited to 'app/nginx/src/os/unix/ngx_freebsd_sendfile_chain.c')
| -rw-r--r-- | app/nginx/src/os/unix/ngx_freebsd_sendfile_chain.c | 333 |
1 files changed, 0 insertions, 333 deletions
diff --git a/app/nginx/src/os/unix/ngx_freebsd_sendfile_chain.c b/app/nginx/src/os/unix/ngx_freebsd_sendfile_chain.c deleted file mode 100644 index 4822e72..0000000 --- a/app/nginx/src/os/unix/ngx_freebsd_sendfile_chain.c +++ /dev/null @@ -1,333 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - * Copyright (C) Nginx, Inc. - */ - - -#include <ngx_config.h> -#include <ngx_core.h> -#include <ngx_event.h> - - -/* - * Although FreeBSD sendfile() allows to pass a header and a trailer, - * it cannot send a header with a part of the file in one packet until - * FreeBSD 5.3. Besides, over the fast ethernet connection sendfile() - * may send the partially filled packets, i.e. the 8 file pages may be sent - * as the 11 full 1460-bytes packets, then one incomplete 324-bytes packet, - * and then again the 11 full 1460-bytes packets. - * - * Therefore we use the TCP_NOPUSH option (similar to Linux's TCP_CORK) - * to postpone the sending - it not only sends a header and the first part of - * the file in one packet, but also sends the file pages in the full packets. - * - * But until FreeBSD 4.5 turning TCP_NOPUSH off does not flush a pending - * data that less than MSS, so that data may be sent with 5 second delay. - * So we do not use TCP_NOPUSH on FreeBSD prior to 4.5, although it can be used - * for non-keepalive HTTP connections. - */ - - -ngx_chain_t * -ngx_freebsd_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) -{ - int rc, flags; - off_t send, prev_send, sent; - size_t file_size; - ssize_t n; - ngx_uint_t eintr, eagain; - ngx_err_t err; - ngx_buf_t *file; - ngx_event_t *wev; - ngx_chain_t *cl; - ngx_iovec_t header, trailer; - struct sf_hdtr hdtr; - struct iovec headers[NGX_IOVS_PREALLOCATE]; - struct iovec trailers[NGX_IOVS_PREALLOCATE]; -#if (NGX_HAVE_AIO_SENDFILE) - ngx_uint_t ebusy; - ngx_event_aio_t *aio; -#endif - - wev = c->write; - - if (!wev->ready) { - return in; - } - -#if (NGX_HAVE_KQUEUE) - - if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { - (void) ngx_connection_error(c, wev->kq_errno, - "kevent() reported about an closed connection"); - wev->error = 1; - return NGX_CHAIN_ERROR; - } - -#endif - - /* the maximum limit size is the maximum size_t value - the page size */ - - if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) { - limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; - } - - send = 0; - eagain = 0; - flags = 0; - -#if (NGX_HAVE_AIO_SENDFILE && NGX_SUPPRESS_WARN) - aio = NULL; - file = NULL; -#endif - - header.iovs = headers; - header.nalloc = NGX_IOVS_PREALLOCATE; - - trailer.iovs = trailers; - trailer.nalloc = NGX_IOVS_PREALLOCATE; - - for ( ;; ) { - eintr = 0; -#if (NGX_HAVE_AIO_SENDFILE) - ebusy = 0; -#endif - prev_send = send; - - /* create the header iovec and coalesce the neighbouring bufs */ - - cl = ngx_output_chain_to_iovec(&header, in, limit - send, c->log); - - if (cl == NGX_CHAIN_ERROR) { - return NGX_CHAIN_ERROR; - } - - send += header.size; - - if (cl && cl->buf->in_file && send < limit) { - file = cl->buf; - - /* coalesce the neighbouring file bufs */ - - file_size = (size_t) ngx_chain_coalesce_file(&cl, limit - send); - - send += file_size; - - if (send < limit) { - - /* - * create the trailer iovec and coalesce the neighbouring bufs - */ - - cl = ngx_output_chain_to_iovec(&trailer, cl, limit - send, - c->log); - if (cl == NGX_CHAIN_ERROR) { - return NGX_CHAIN_ERROR; - } - - send += trailer.size; - - } else { - trailer.count = 0; - } - - if (ngx_freebsd_use_tcp_nopush - && c->tcp_nopush == NGX_TCP_NOPUSH_UNSET) - { - if (ngx_tcp_nopush(c->fd) == NGX_ERROR) { - err = ngx_socket_errno; - - /* - * there is a tiny chance to be interrupted, however, - * we continue a processing without the TCP_NOPUSH - */ - - if (err != NGX_EINTR) { - wev->error = 1; - (void) ngx_connection_error(c, err, - ngx_tcp_nopush_n " failed"); - return NGX_CHAIN_ERROR; - } - - } else { - c->tcp_nopush = NGX_TCP_NOPUSH_SET; - - ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, - "tcp_nopush"); - } - } - - /* - * sendfile() does unneeded work if sf_hdtr's count is 0, - * but corresponding pointer is not NULL - */ - - hdtr.headers = header.count ? header.iovs : NULL; - hdtr.hdr_cnt = header.count; - hdtr.trailers = trailer.count ? trailer.iovs : NULL; - hdtr.trl_cnt = trailer.count; - - /* - * the "nbytes bug" of the old sendfile() syscall: - * http://bugs.freebsd.org/33771 - */ - - if (!ngx_freebsd_sendfile_nbytes_bug) { - header.size = 0; - } - - sent = 0; - -#if (NGX_HAVE_AIO_SENDFILE) - aio = file->file->aio; - flags = (aio && aio->preload_handler) ? SF_NODISKIO : 0; -#endif - - rc = sendfile(file->file->fd, c->fd, file->file_pos, - file_size + header.size, &hdtr, &sent, flags); - - if (rc == -1) { - err = ngx_errno; - - switch (err) { - case NGX_EAGAIN: - eagain = 1; - break; - - case NGX_EINTR: - eintr = 1; - break; - -#if (NGX_HAVE_AIO_SENDFILE) - case NGX_EBUSY: - ebusy = 1; - break; -#endif - - default: - wev->error = 1; - (void) ngx_connection_error(c, err, "sendfile() failed"); - return NGX_CHAIN_ERROR; - } - - ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, err, - "sendfile() sent only %O bytes", sent); - - /* - * sendfile() in FreeBSD 3.x-4.x may return value >= 0 - * on success, although only 0 is documented - */ - - } else if (rc >= 0 && sent == 0) { - - /* - * if rc is OK and sent equal to zero, then someone - * has truncated the file, so the offset became beyond - * the end of the file - */ - - ngx_log_error(NGX_LOG_ALERT, c->log, 0, - "sendfile() reported that \"%s\" was truncated at %O", - file->file->name.data, file->file_pos); - - return NGX_CHAIN_ERROR; - } - - ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, - "sendfile: %d, @%O %O:%uz", - rc, file->file_pos, sent, file_size + header.size); - - } else { - n = ngx_writev(c, &header); - - if (n == NGX_ERROR) { - return NGX_CHAIN_ERROR; - } - - sent = (n == NGX_AGAIN) ? 0 : n; - } - - c->sent += sent; - - in = ngx_chain_update_sent(in, sent); - -#if (NGX_HAVE_AIO_SENDFILE) - - if (ebusy) { - if (aio->event.active) { - /* - * tolerate duplicate calls; they can happen due to subrequests - * or multiple calls of the next body filter from a filter - */ - - if (sent) { - c->busy_count = 0; - } - - return in; - } - - if (sent == 0) { - c->busy_count++; - - if (c->busy_count > 2) { - ngx_log_error(NGX_LOG_ALERT, c->log, 0, - "sendfile(%V) returned busy again", - &file->file->name); - - c->busy_count = 0; - aio->preload_handler = NULL; - - send = prev_send; - continue; - } - - } else { - c->busy_count = 0; - } - - n = aio->preload_handler(file); - - if (n > 0) { - send = prev_send + sent; - continue; - } - - return in; - } - - if (flags == SF_NODISKIO) { - c->busy_count = 0; - } - -#endif - - if (eagain) { - - /* - * sendfile() may return EAGAIN, even if it has sent a whole file - * part, it indicates that the successive sendfile() call would - * return EAGAIN right away and would not send anything. - * We use it as a hint. - */ - - wev->ready = 0; - return in; - } - - if (eintr) { - send = prev_send + sent; - continue; - } - - if (send - prev_send != sent) { - wev->ready = 0; - return in; - } - - if (send >= limit || in == NULL) { - return in; - } - } -} |