|
0
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
660
|
4 * Copyright (C) Nginx, Inc.
|
|
0
|
5 */
|
|
|
6
|
|
|
7
|
|
|
8 #include <ngx_config.h>
|
|
|
9 #include <ngx_core.h>
|
|
|
10 #include <ngx_event.h>
|
|
|
11
|
|
|
12
|
|
|
13 /*
|
|
28
|
14 * Although FreeBSD sendfile() allows to pass a header and a trailer,
|
|
640
|
15 * it cannot send a header with a part of the file in one packet until
|
|
28
|
16 * FreeBSD 5.3. Besides, over the fast ethernet connection sendfile()
|
|
0
|
17 * may send the partially filled packets, i.e. the 8 file pages may be sent
|
|
|
18 * as the 11 full 1460-bytes packets, then one incomplete 324-bytes packet,
|
|
|
19 * and then again the 11 full 1460-bytes packets.
|
|
|
20 *
|
|
28
|
21 * Threfore we use the TCP_NOPUSH option (similar to Linux's TCP_CORK)
|
|
|
22 * to postpone the sending - it not only sends a header and the first part of
|
|
|
23 * the file in one packet, but also sends the file pages in the full packets.
|
|
0
|
24 *
|
|
50
|
25 * But until FreeBSD 4.5 turning TCP_NOPUSH off does not flush a pending
|
|
|
26 * data that less than MSS, so that data may be sent with 5 second delay.
|
|
|
27 * So we do not use TCP_NOPUSH on FreeBSD prior to 4.5, although it can be used
|
|
0
|
28 * for non-keepalive HTTP connections.
|
|
|
29 */
|
|
|
30
|
|
|
31
|
|
146
|
32 #if (IOV_MAX > 64)
|
|
|
33 #define NGX_HEADERS 64
|
|
|
34 #define NGX_TRAILERS 64
|
|
|
35 #else
|
|
|
36 #define NGX_HEADERS IOV_MAX
|
|
|
37 #define NGX_TRAILERS IOV_MAX
|
|
|
38 #endif
|
|
0
|
39
|
|
|
40
|
|
50
|
41 ngx_chain_t *
|
|
|
42 ngx_freebsd_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
|
|
0
|
43 {
|
|
520
|
44 int rc, flags;
|
|
0
|
45 u_char *prev;
|
|
22
|
46 off_t size, send, prev_send, aligned, sent, fprev;
|
|
|
47 size_t header_size, file_size;
|
|
0
|
48 ngx_uint_t eintr, eagain, complete;
|
|
|
49 ngx_err_t err;
|
|
|
50 ngx_buf_t *file;
|
|
|
51 ngx_array_t header, trailer;
|
|
|
52 ngx_event_t *wev;
|
|
|
53 ngx_chain_t *cl;
|
|
|
54 struct sf_hdtr hdtr;
|
|
|
55 struct iovec *iov, headers[NGX_HEADERS], trailers[NGX_TRAILERS];
|
|
|
56
|
|
|
57 wev = c->write;
|
|
|
58
|
|
|
59 if (!wev->ready) {
|
|
|
60 return in;
|
|
|
61 }
|
|
|
62
|
|
18
|
63 #if (NGX_HAVE_KQUEUE)
|
|
0
|
64
|
|
136
|
65 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) {
|
|
86
|
66 (void) ngx_connection_error(c, wev->kq_errno,
|
|
|
67 "kevent() reported about an closed connection");
|
|
0
|
68 wev->error = 1;
|
|
|
69 return NGX_CHAIN_ERROR;
|
|
|
70 }
|
|
|
71
|
|
|
72 #endif
|
|
|
73
|
|
22
|
74 /* the maximum limit size is the maximum size_t value - the page size */
|
|
|
75
|
|
324
|
76 if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) {
|
|
26
|
77 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize;
|
|
22
|
78 }
|
|
|
79
|
|
0
|
80 send = 0;
|
|
|
81 eagain = 0;
|
|
520
|
82 flags = 0;
|
|
0
|
83
|
|
|
84 header.elts = headers;
|
|
|
85 header.size = sizeof(struct iovec);
|
|
|
86 header.nalloc = NGX_HEADERS;
|
|
|
87 header.pool = c->pool;
|
|
|
88
|
|
|
89 trailer.elts = trailers;
|
|
|
90 trailer.size = sizeof(struct iovec);
|
|
|
91 trailer.nalloc = NGX_TRAILERS;
|
|
|
92 trailer.pool = c->pool;
|
|
|
93
|
|
|
94 for ( ;; ) {
|
|
|
95 file = NULL;
|
|
22
|
96 file_size = 0;
|
|
|
97 header_size = 0;
|
|
0
|
98 eintr = 0;
|
|
|
99 complete = 0;
|
|
22
|
100 prev_send = send;
|
|
0
|
101
|
|
|
102 header.nelts = 0;
|
|
|
103 trailer.nelts = 0;
|
|
|
104
|
|
|
105 /* create the header iovec and coalesce the neighbouring bufs */
|
|
|
106
|
|
|
107 prev = NULL;
|
|
|
108 iov = NULL;
|
|
|
109
|
|
|
110 for (cl = in;
|
|
|
111 cl && header.nelts < IOV_MAX && send < limit;
|
|
|
112 cl = cl->next)
|
|
|
113 {
|
|
|
114 if (ngx_buf_special(cl->buf)) {
|
|
|
115 continue;
|
|
|
116 }
|
|
|
117
|
|
|
118 if (!ngx_buf_in_memory_only(cl->buf)) {
|
|
|
119 break;
|
|
|
120 }
|
|
|
121
|
|
|
122 size = cl->buf->last - cl->buf->pos;
|
|
|
123
|
|
|
124 if (send + size > limit) {
|
|
|
125 size = limit - send;
|
|
|
126 }
|
|
|
127
|
|
|
128 if (prev == cl->buf->pos) {
|
|
22
|
129 iov->iov_len += (size_t) size;
|
|
0
|
130
|
|
|
131 } else {
|
|
50
|
132 iov = ngx_array_push(&header);
|
|
|
133 if (iov == NULL) {
|
|
0
|
134 return NGX_CHAIN_ERROR;
|
|
|
135 }
|
|
|
136
|
|
|
137 iov->iov_base = (void *) cl->buf->pos;
|
|
22
|
138 iov->iov_len = (size_t) size;
|
|
0
|
139 }
|
|
|
140
|
|
22
|
141 prev = cl->buf->pos + (size_t) size;
|
|
|
142 header_size += (size_t) size;
|
|
0
|
143 send += size;
|
|
|
144 }
|
|
|
145
|
|
|
146
|
|
|
147 if (cl && cl->buf->in_file && send < limit) {
|
|
|
148 file = cl->buf;
|
|
|
149
|
|
|
150 /* coalesce the neighbouring file bufs */
|
|
|
151
|
|
|
152 do {
|
|
22
|
153 size = cl->buf->file_last - cl->buf->file_pos;
|
|
0
|
154
|
|
|
155 if (send + size > limit) {
|
|
|
156 size = limit - send;
|
|
|
157
|
|
|
158 aligned = (cl->buf->file_pos + size + ngx_pagesize - 1)
|
|
298
|
159 & ~((off_t) ngx_pagesize - 1);
|
|
0
|
160
|
|
|
161 if (aligned <= cl->buf->file_last) {
|
|
|
162 size = aligned - cl->buf->file_pos;
|
|
|
163 }
|
|
|
164 }
|
|
|
165
|
|
22
|
166 file_size += (size_t) size;
|
|
0
|
167 send += size;
|
|
|
168 fprev = cl->buf->file_pos + size;
|
|
|
169 cl = cl->next;
|
|
|
170
|
|
|
171 } while (cl
|
|
|
172 && cl->buf->in_file
|
|
|
173 && send < limit
|
|
|
174 && file->file->fd == cl->buf->file->fd
|
|
|
175 && fprev == cl->buf->file_pos);
|
|
|
176 }
|
|
|
177
|
|
4
|
178
|
|
0
|
179 if (file) {
|
|
4
|
180
|
|
664
|
181 /* create the trailer iovec and coalesce the neighbouring bufs */
|
|
0
|
182
|
|
|
183 prev = NULL;
|
|
|
184 iov = NULL;
|
|
|
185
|
|
4
|
186 while (cl && header.nelts < IOV_MAX && send < limit) {
|
|
|
187
|
|
0
|
188 if (ngx_buf_special(cl->buf)) {
|
|
4
|
189 cl = cl->next;
|
|
0
|
190 continue;
|
|
|
191 }
|
|
|
192
|
|
|
193 if (!ngx_buf_in_memory_only(cl->buf)) {
|
|
|
194 break;
|
|
|
195 }
|
|
|
196
|
|
|
197 size = cl->buf->last - cl->buf->pos;
|
|
|
198
|
|
|
199 if (send + size > limit) {
|
|
|
200 size = limit - send;
|
|
|
201 }
|
|
|
202
|
|
|
203 if (prev == cl->buf->pos) {
|
|
22
|
204 iov->iov_len += (size_t) size;
|
|
0
|
205
|
|
|
206 } else {
|
|
50
|
207 iov = ngx_array_push(&trailer);
|
|
|
208 if (iov == NULL) {
|
|
0
|
209 return NGX_CHAIN_ERROR;
|
|
|
210 }
|
|
|
211
|
|
|
212 iov->iov_base = (void *) cl->buf->pos;
|
|
22
|
213 iov->iov_len = (size_t) size;
|
|
0
|
214 }
|
|
|
215
|
|
22
|
216 prev = cl->buf->pos + (size_t) size;
|
|
0
|
217 send += size;
|
|
4
|
218 cl = cl->next;
|
|
0
|
219 }
|
|
|
220 }
|
|
|
221
|
|
|
222 if (file) {
|
|
|
223
|
|
|
224 if (ngx_freebsd_use_tcp_nopush
|
|
|
225 && c->tcp_nopush == NGX_TCP_NOPUSH_UNSET)
|
|
|
226 {
|
|
|
227 if (ngx_tcp_nopush(c->fd) == NGX_ERROR) {
|
|
|
228 err = ngx_errno;
|
|
|
229
|
|
|
230 /*
|
|
28
|
231 * there is a tiny chance to be interrupted, however,
|
|
0
|
232 * we continue a processing without the TCP_NOPUSH
|
|
|
233 */
|
|
|
234
|
|
|
235 if (err != NGX_EINTR) {
|
|
|
236 wev->error = 1;
|
|
86
|
237 (void) ngx_connection_error(c, err,
|
|
|
238 ngx_tcp_nopush_n " failed");
|
|
0
|
239 return NGX_CHAIN_ERROR;
|
|
|
240 }
|
|
|
241
|
|
|
242 } else {
|
|
|
243 c->tcp_nopush = NGX_TCP_NOPUSH_SET;
|
|
|
244
|
|
|
245 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
|
246 "tcp_nopush");
|
|
|
247 }
|
|
|
248 }
|
|
|
249
|
|
654
|
250 /*
|
|
|
251 * sendfile() does unneeded work if sf_hdtr's count is 0,
|
|
|
252 * but corresponding pointer is not NULL
|
|
|
253 */
|
|
|
254
|
|
|
255 hdtr.headers = header.nelts ? (struct iovec *) header.elts: NULL;
|
|
0
|
256 hdtr.hdr_cnt = header.nelts;
|
|
654
|
257 hdtr.trailers = trailer.nelts ? (struct iovec *) trailer.elts: NULL;
|
|
0
|
258 hdtr.trl_cnt = trailer.nelts;
|
|
|
259
|
|
|
260 /*
|
|
|
261 * the "nbytes bug" of the old sendfile() syscall:
|
|
|
262 * http://www.freebsd.org/cgi/query-pr.cgi?pr=33771
|
|
|
263 */
|
|
|
264
|
|
28
|
265 if (!ngx_freebsd_sendfile_nbytes_bug) {
|
|
22
|
266 header_size = 0;
|
|
0
|
267 }
|
|
|
268
|
|
|
269 sent = 0;
|
|
|
270
|
|
520
|
271 #if (NGX_HAVE_AIO_SENDFILE)
|
|
|
272 flags = c->aio_sendfile ? SF_NODISKIO : 0;
|
|
|
273 #endif
|
|
|
274
|
|
0
|
275 rc = sendfile(file->file->fd, c->fd, file->file_pos,
|
|
520
|
276 file_size + header_size, &hdtr, &sent, flags);
|
|
0
|
277
|
|
|
278 if (rc == -1) {
|
|
|
279 err = ngx_errno;
|
|
|
280
|
|
520
|
281 switch (err) {
|
|
|
282 case NGX_EAGAIN:
|
|
|
283 eagain = 1;
|
|
|
284 break;
|
|
0
|
285
|
|
520
|
286 case NGX_EINTR:
|
|
|
287 eintr = 1;
|
|
|
288 break;
|
|
0
|
289
|
|
520
|
290 #if (NGX_HAVE_AIO_SENDFILE)
|
|
|
291 case NGX_EBUSY:
|
|
|
292 c->busy_sendfile = file;
|
|
|
293 break;
|
|
|
294 #endif
|
|
0
|
295
|
|
520
|
296 default:
|
|
0
|
297 wev->error = 1;
|
|
86
|
298 (void) ngx_connection_error(c, err, "sendfile() failed");
|
|
0
|
299 return NGX_CHAIN_ERROR;
|
|
|
300 }
|
|
520
|
301
|
|
|
302 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, err,
|
|
|
303 "sendfile() sent only %O bytes", sent);
|
|
0
|
304
|
|
32
|
305 /*
|
|
|
306 * sendfile() in FreeBSD 3.x-4.x may return value >= 0
|
|
|
307 * on success, although only 0 is documented
|
|
|
308 */
|
|
|
309
|
|
524
|
310 } else if (rc >= 0 && sent == 0) {
|
|
4
|
311
|
|
|
312 /*
|
|
32
|
313 * if rc is OK and sent equal to zero, then someone
|
|
|
314 * has truncated the file, so the offset became beyond
|
|
|
315 * the end of the file
|
|
4
|
316 */
|
|
|
317
|
|
|
318 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
|
|
524
|
319 "sendfile() reported that \"%s\" was truncated at %O",
|
|
|
320 file->file->name.data, file->file_pos);
|
|
4
|
321
|
|
|
322 return NGX_CHAIN_ERROR;
|
|
|
323 }
|
|
|
324
|
|
0
|
325 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
10
|
326 "sendfile: %d, @%O %O:%uz",
|
|
22
|
327 rc, file->file_pos, sent, file_size + header_size);
|
|
0
|
328
|
|
|
329 } else {
|
|
|
330 rc = writev(c->fd, header.elts, header.nelts);
|
|
|
331
|
|
|
332 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
22
|
333 "writev: %d of %uz", rc, header_size);
|
|
0
|
334
|
|
|
335 if (rc == -1) {
|
|
|
336 err = ngx_errno;
|
|
|
337
|
|
520
|
338 switch (err) {
|
|
|
339 case NGX_EAGAIN:
|
|
|
340 break;
|
|
0
|
341
|
|
520
|
342 case NGX_EINTR:
|
|
|
343 eintr = 1;
|
|
|
344 break;
|
|
0
|
345
|
|
520
|
346 default:
|
|
0
|
347 wev->error = 1;
|
|
|
348 ngx_connection_error(c, err, "writev() failed");
|
|
|
349 return NGX_CHAIN_ERROR;
|
|
|
350 }
|
|
520
|
351
|
|
|
352 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
|
|
|
353 "writev() not ready");
|
|
0
|
354 }
|
|
|
355
|
|
|
356 sent = rc > 0 ? rc : 0;
|
|
|
357 }
|
|
|
358
|
|
22
|
359 if (send - prev_send == sent) {
|
|
0
|
360 complete = 1;
|
|
|
361 }
|
|
|
362
|
|
|
363 c->sent += sent;
|
|
|
364
|
|
|
365 for (cl = in; cl; cl = cl->next) {
|
|
|
366
|
|
|
367 if (ngx_buf_special(cl->buf)) {
|
|
|
368 continue;
|
|
|
369 }
|
|
|
370
|
|
|
371 if (sent == 0) {
|
|
|
372 break;
|
|
|
373 }
|
|
|
374
|
|
|
375 size = ngx_buf_size(cl->buf);
|
|
|
376
|
|
|
377 if (sent >= size) {
|
|
|
378 sent -= size;
|
|
|
379
|
|
|
380 if (ngx_buf_in_memory(cl->buf)) {
|
|
|
381 cl->buf->pos = cl->buf->last;
|
|
|
382 }
|
|
|
383
|
|
|
384 if (cl->buf->in_file) {
|
|
|
385 cl->buf->file_pos = cl->buf->file_last;
|
|
|
386 }
|
|
|
387
|
|
|
388 continue;
|
|
|
389 }
|
|
|
390
|
|
|
391 if (ngx_buf_in_memory(cl->buf)) {
|
|
22
|
392 cl->buf->pos += (size_t) sent;
|
|
0
|
393 }
|
|
|
394
|
|
|
395 if (cl->buf->in_file) {
|
|
|
396 cl->buf->file_pos += sent;
|
|
|
397 }
|
|
|
398
|
|
|
399 break;
|
|
|
400 }
|
|
|
401
|
|
520
|
402 #if (NGX_HAVE_AIO_SENDFILE)
|
|
|
403 if (c->busy_sendfile) {
|
|
|
404 return cl;
|
|
|
405 }
|
|
|
406 #endif
|
|
|
407
|
|
0
|
408 if (eagain) {
|
|
|
409
|
|
|
410 /*
|
|
28
|
411 * sendfile() may return EAGAIN, even if it has sent a whole file
|
|
|
412 * part, it indicates that the successive sendfile() call would
|
|
0
|
413 * return EAGAIN right away and would not send anything.
|
|
|
414 * We use it as a hint.
|
|
|
415 */
|
|
|
416
|
|
|
417 wev->ready = 0;
|
|
|
418 return cl;
|
|
|
419 }
|
|
|
420
|
|
|
421 if (eintr) {
|
|
|
422 continue;
|
|
|
423 }
|
|
|
424
|
|
|
425 if (!complete) {
|
|
|
426 wev->ready = 0;
|
|
|
427 return cl;
|
|
|
428 }
|
|
|
429
|
|
|
430 if (send >= limit || cl == NULL) {
|
|
|
431 return cl;
|
|
|
432 }
|
|
|
433
|
|
|
434 in = cl;
|
|
|
435 }
|
|
|
436 }
|
