154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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* Copyright (C) NGINX, Inc.
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*/
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#include <nxt_main.h>
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/* sendfile() has been introduced in MacOSX 10.5 (Leopard) */
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#ifdef NXT_TEST_BUILD_MACOSX_SENDFILE
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ssize_t nxt_macosx_event_conn_io_sendfile(nxt_event_conn_t *c, nxt_buf_t *b,
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size_t limit);
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static int nxt_sys_sendfile(int fd, int s, off_t offset, off_t *len,
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struct sf_hdtr *hdtr, int flags)
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{
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return -1;
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}
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#else
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#define nxt_sys_sendfile sendfile
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#endif
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ssize_t
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nxt_macosx_event_conn_io_sendfile(nxt_conn_t *c, nxt_buf_t *b, size_t limit)
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{
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size_t hd_size, file_size;
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ssize_t n;
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nxt_buf_t *fb;
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nxt_err_t err;
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nxt_off_t sent;
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nxt_uint_t nhd, ntr;
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struct iovec hd[NXT_IOBUF_MAX], tr[NXT_IOBUF_MAX];
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struct sf_hdtr hdtr, *ht;
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nxt_sendbuf_coalesce_t sb;
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sb.buf = b;
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sb.iobuf = hd;
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sb.nmax = NXT_IOBUF_MAX;
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sb.sync = 0;
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sb.size = 0;
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sb.limit = limit;
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nhd = nxt_sendbuf_mem_coalesce(c->socket.task, &sb);
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if (nhd == 0 && sb.sync) {
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return 0;
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}
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if (sb.buf == NULL || !nxt_buf_is_file(sb.buf)) {
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return nxt_event_conn_io_writev(c, hd, nhd);
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}
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hd_size = sb.size;
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fb = sb.buf;
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file_size = nxt_sendbuf_file_coalesce(&sb);
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if (file_size == 0) {
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return nxt_event_conn_io_writev(c, hd, nhd);
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}
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sb.iobuf = tr;
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ntr = nxt_sendbuf_mem_coalesce(c->socket.task, &sb);
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/*
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* Disposal of surplus kernel operations if there are no headers
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* and trailers. Besides sendfile() returns EINVAL if a sf_hdtr's
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* count is 0, but corresponding pointer is not NULL.
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*/
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nxt_memzero(&hdtr, sizeof(struct sf_hdtr));
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ht = NULL;
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if (nhd != 0) {
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ht = &hdtr;
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hdtr.headers = hd;
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hdtr.hdr_cnt = nhd;
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}
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if (ntr != 0) {
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ht = &hdtr;
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hdtr.trailers = tr;
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hdtr.trl_cnt = ntr;
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}
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/*
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* MacOSX has the same bug as old FreeBSD (http://bugs.freebsd.org/33771).
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* However this bug has never been fixed and instead of this it has been
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* documented as a feature in MacOSX 10.7 (Lion) sendfile(2):
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*
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* When a header or trailer is specified, the value of len argument
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* indicates the maximum number of bytes in the header and/or file
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* to be sent. It does not control the trailer; if a trailer exists,
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* all of it will be sent.
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*/
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sent = hd_size + file_size;
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nxt_log_debug(c->socket.log,
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"sendfile(%FD, %d, @%O, %O) hd:%ui tr:%ui hs:%uz",
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fb->file->fd, c->socket.fd, fb->file_pos, sent,
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nhd, ntr, hd_size);
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n = nxt_sys_sendfile(fb->file->fd, c->socket.fd,
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fb->file_pos, &sent, ht, 0);
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err = (n == -1) ? nxt_errno : 0;
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nxt_debug(c->socket.task, "sendfile(): %d sent:%O", n, sent);
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if (n == -1) {
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switch (err) {
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case NXT_EAGAIN:
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c->socket.write_ready = 0;
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break;
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case NXT_EINTR:
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break;
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default:
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c->socket.error = err;
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nxt_log(c->socket.task, nxt_socket_error_level(err),
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"sendfile(%FD, %d, %O, %O) failed %E \"%FN\" hd:%ui tr:%ui",
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fb->file->fd, c->socket.fd, fb->file_pos, sent, err,
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fb->file->name, nhd, ntr);
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return NXT_ERROR;
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}
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nxt_debug(c->socket.task, "sendfile() %E", err);
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return sent;
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}
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if (sent == 0) {
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nxt_log(c->socket.task, NXT_LOG_ERR,
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"file \"%FN\" was truncated while sendfile()", fb->file->name);
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return NXT_ERROR;
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}
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if (sent < (nxt_off_t) sb.size) {
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c->socket.write_ready = 0;
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}
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return sent;
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}
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