|
0
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
|
4 */
|
|
|
5
|
|
|
6
|
|
|
7 #include <ngx_config.h>
|
|
|
8 #include <ngx_core.h>
|
|
|
9 #include <ngx_event.h>
|
|
|
10 #include <ngx_event_pipe.h>
|
|
|
11
|
|
|
12
|
|
|
13 static ngx_int_t ngx_event_pipe_read_upstream(ngx_event_pipe_t *p);
|
|
|
14 static ngx_int_t ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p);
|
|
|
15
|
|
|
16 static ngx_int_t ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p);
|
|
|
17 ngx_inline static void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf);
|
|
|
18 ngx_inline static void ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free,
|
|
|
19 ngx_buf_t *buf);
|
|
|
20 ngx_inline static void ngx_event_pipe_add_free_buf(ngx_chain_t **chain,
|
|
|
21 ngx_chain_t *cl);
|
|
|
22 static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p);
|
|
|
23
|
|
|
24
|
|
|
25 ngx_int_t ngx_event_pipe(ngx_event_pipe_t *p, int do_write)
|
|
|
26 {
|
|
|
27 u_int flags;
|
|
|
28 ngx_event_t *rev, *wev;
|
|
|
29
|
|
|
30 for ( ;; ) {
|
|
|
31 if (do_write) {
|
|
|
32 if (ngx_event_pipe_write_to_downstream(p) == NGX_ABORT) {
|
|
|
33 return NGX_ABORT;
|
|
|
34 }
|
|
|
35 }
|
|
|
36
|
|
|
37 p->read = 0;
|
|
|
38 p->upstream_blocked = 0;
|
|
|
39
|
|
|
40 if (ngx_event_pipe_read_upstream(p) == NGX_ABORT) {
|
|
|
41 return NGX_ABORT;
|
|
|
42 }
|
|
|
43
|
|
|
44 if (!p->read && !p->upstream_blocked) {
|
|
|
45 break;
|
|
|
46 }
|
|
|
47
|
|
|
48 do_write = 1;
|
|
|
49 }
|
|
|
50
|
|
|
51 if (p->upstream->fd != -1) {
|
|
|
52 rev = p->upstream->read;
|
|
|
53
|
|
|
54 flags = (rev->eof || rev->error) ? NGX_CLOSE_EVENT : 0;
|
|
|
55
|
|
|
56 if (ngx_handle_read_event(rev, flags) == NGX_ERROR) {
|
|
|
57 return NGX_ABORT;
|
|
|
58 }
|
|
|
59
|
|
|
60 if (rev->active) {
|
|
|
61 ngx_add_timer(rev, p->read_timeout);
|
|
|
62 }
|
|
|
63 }
|
|
|
64
|
|
|
65 if (p->downstream->fd != -1) {
|
|
|
66 wev = p->downstream->write;
|
|
|
67 wev->available = p->send_lowat;
|
|
|
68 if (ngx_handle_write_event(wev, NGX_LOWAT_EVENT) == NGX_ERROR) {
|
|
|
69 return NGX_ABORT;
|
|
|
70 }
|
|
|
71
|
|
|
72 if (wev->active) {
|
|
|
73 ngx_add_timer(wev, p->send_timeout);
|
|
|
74 }
|
|
|
75 }
|
|
|
76
|
|
|
77 return NGX_OK;
|
|
|
78 }
|
|
|
79
|
|
|
80
|
|
|
81 ngx_int_t ngx_event_pipe_read_upstream(ngx_event_pipe_t *p)
|
|
|
82 {
|
|
|
83 int n, rc, size;
|
|
|
84 ngx_buf_t *b;
|
|
|
85 ngx_chain_t *chain, *cl, *tl;
|
|
|
86
|
|
|
87 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
|
|
|
88 return NGX_OK;
|
|
|
89 }
|
|
|
90
|
|
|
91 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
92 "pipe read upstream: %d", p->upstream->read->ready);
|
|
|
93
|
|
|
94 for ( ;; ) {
|
|
|
95
|
|
|
96 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
|
|
|
97 break;
|
|
|
98 }
|
|
|
99
|
|
|
100 if (p->preread_bufs == NULL && !p->upstream->read->ready) {
|
|
|
101 break;
|
|
|
102 }
|
|
|
103
|
|
|
104 if (p->preread_bufs) {
|
|
|
105
|
|
|
106 /* use the pre-read bufs if they exist */
|
|
|
107
|
|
|
108 chain = p->preread_bufs;
|
|
|
109 p->preread_bufs = NULL;
|
|
|
110 n = p->preread_size;
|
|
|
111
|
|
|
112 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
113 "pipe preread: %d", n);
|
|
|
114
|
|
|
115 if (n) {
|
|
|
116 p->read = 1;
|
|
|
117 }
|
|
|
118
|
|
|
119 } else {
|
|
|
120
|
|
|
121 /*
|
|
|
122 * kqueue notifies about the end of file or a pending error.
|
|
|
123 * This test allows not to allocate a buf on these conditions
|
|
|
124 * and not to call ngx_recv_chain().
|
|
|
125 */
|
|
|
126
|
|
|
127 if (p->upstream->read->available == 0
|
|
|
128 && p->upstream->read->pending_eof)
|
|
|
129 {
|
|
|
130 p->upstream->read->ready = 0;
|
|
|
131 p->upstream->read->eof = 0;
|
|
|
132 p->upstream_eof = 1;
|
|
|
133 p->read = 1;
|
|
|
134
|
|
|
135 #if (HAVE_KQUEUE)
|
|
|
136 if (p->upstream->read->kq_errno) {
|
|
|
137 p->upstream->read->error = 1;
|
|
|
138 p->upstream_error = 1;
|
|
|
139 p->upstream_eof = 0;
|
|
|
140
|
|
|
141 ngx_log_error(NGX_LOG_ERR, p->log,
|
|
|
142 p->upstream->read->kq_errno,
|
|
|
143 "readv() failed");
|
|
|
144 }
|
|
|
145 #endif
|
|
|
146
|
|
|
147 break;
|
|
|
148 }
|
|
|
149
|
|
|
150 if (p->free_raw_bufs) {
|
|
|
151
|
|
|
152 /* use the free bufs if they exist */
|
|
|
153
|
|
|
154 chain = p->free_raw_bufs;
|
|
|
155 if (p->single_buf) {
|
|
|
156 p->free_raw_bufs = p->free_raw_bufs->next;
|
|
|
157 chain->next = NULL;
|
|
|
158 } else {
|
|
|
159 p->free_raw_bufs = NULL;
|
|
|
160 }
|
|
|
161
|
|
|
162 } else if (p->allocated < p->bufs.num) {
|
|
|
163
|
|
|
164 /* allocate a new buf if it's still allowed */
|
|
|
165
|
|
|
166 if (!(b = ngx_create_temp_buf(p->pool, p->bufs.size))) {
|
|
|
167 return NGX_ABORT;
|
|
|
168 }
|
|
|
169
|
|
|
170 p->allocated++;
|
|
|
171
|
|
|
172 ngx_alloc_link_and_set_buf(tl, b, p->pool, NGX_ABORT);
|
|
|
173 chain = tl;
|
|
|
174
|
|
|
175 } else if (!p->cachable && p->downstream->write->ready) {
|
|
|
176
|
|
|
177 /*
|
|
|
178 * if the bufs are not needed to be saved in a cache and
|
|
|
179 * a downstream is ready then write the bufs to a downstream
|
|
|
180 */
|
|
|
181
|
|
|
182 p->upstream_blocked = 1;
|
|
|
183
|
|
|
184 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
185 "pipe downstream ready");
|
|
|
186
|
|
|
187 break;
|
|
|
188
|
|
|
189 } else if (p->cachable
|
|
|
190 || p->temp_file->offset < p->max_temp_file_size)
|
|
|
191 {
|
|
|
192
|
|
|
193 /*
|
|
|
194 * if it's allowed then save some bufs from r->in
|
|
|
195 * to a temporary file, and add them to a r->out chain
|
|
|
196 */
|
|
|
197
|
|
|
198 rc = ngx_event_pipe_write_chain_to_temp_file(p);
|
|
|
199
|
|
|
200 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
201 "pipe temp offset: %d", p->temp_file->offset);
|
|
|
202
|
|
|
203 if (rc == NGX_AGAIN) {
|
|
|
204 if (ngx_event_flags & NGX_USE_LEVEL_EVENT
|
|
|
205 && p->upstream->read->active
|
|
|
206 && p->upstream->read->ready)
|
|
|
207 {
|
|
|
208 if (ngx_del_event(p->upstream->read, NGX_READ_EVENT, 0)
|
|
|
209 == NGX_ERROR)
|
|
|
210 {
|
|
|
211 return NGX_ABORT;
|
|
|
212 }
|
|
|
213 }
|
|
|
214 }
|
|
|
215
|
|
|
216 if (rc != NGX_OK) {
|
|
|
217 return rc;
|
|
|
218 }
|
|
|
219
|
|
|
220 chain = p->free_raw_bufs;
|
|
|
221 if (p->single_buf) {
|
|
|
222 p->free_raw_bufs = p->free_raw_bufs->next;
|
|
|
223 chain->next = NULL;
|
|
|
224 } else {
|
|
|
225 p->free_raw_bufs = NULL;
|
|
|
226 }
|
|
|
227
|
|
|
228 } else {
|
|
|
229
|
|
|
230 /* if there're no bufs to read in then disable a level event */
|
|
|
231
|
|
|
232 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
233 "no pipe bufs to read in");
|
|
|
234
|
|
|
235 break;
|
|
|
236 }
|
|
|
237
|
|
|
238 n = ngx_recv_chain(p->upstream, chain);
|
|
|
239
|
|
|
240 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
241 "pipe recv chain: %d", n);
|
|
|
242
|
|
|
243 if (p->free_raw_bufs) {
|
|
|
244 chain->next = p->free_raw_bufs;
|
|
|
245 }
|
|
|
246 p->free_raw_bufs = chain;
|
|
|
247
|
|
|
248 if (n == NGX_ERROR) {
|
|
|
249 p->upstream_error = 1;
|
|
|
250 return NGX_ERROR;
|
|
|
251 }
|
|
|
252
|
|
|
253 if (n == NGX_AGAIN) {
|
|
|
254 if (p->single_buf) {
|
|
|
255 ngx_event_pipe_remove_shadow_links(chain->buf);
|
|
|
256 }
|
|
|
257
|
|
|
258 break;
|
|
|
259 }
|
|
|
260
|
|
|
261 p->read = 1;
|
|
|
262
|
|
|
263 if (n == 0) {
|
|
|
264 p->upstream_eof = 1;
|
|
|
265 break;
|
|
|
266 }
|
|
|
267 }
|
|
|
268
|
|
|
269 p->read_length += n;
|
|
|
270 cl = chain;
|
|
|
271
|
|
|
272 while (cl && n > 0) {
|
|
|
273
|
|
|
274 ngx_event_pipe_remove_shadow_links(cl->buf);
|
|
|
275
|
|
|
276 size = cl->buf->end - cl->buf->last;
|
|
|
277
|
|
|
278 if (n >= size) {
|
|
|
279 cl->buf->last = cl->buf->end;
|
|
|
280
|
|
|
281 /* STUB */ cl->buf->num = p->num++;
|
|
|
282
|
|
|
283 if (p->input_filter(p, cl->buf) == NGX_ERROR) {
|
|
|
284 return NGX_ABORT;
|
|
|
285 }
|
|
|
286
|
|
|
287 n -= size;
|
|
|
288 cl = cl->next;
|
|
|
289
|
|
|
290 } else {
|
|
|
291 cl->buf->last += n;
|
|
|
292 n = 0;
|
|
|
293 }
|
|
|
294 }
|
|
|
295
|
|
|
296 p->free_raw_bufs = cl;
|
|
|
297 }
|
|
|
298
|
|
|
299 #if (NGX_DEBUG)
|
|
|
300
|
|
|
301 if (p->in || p->busy || p->free_raw_bufs) {
|
|
|
302 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0, "pipe buf");
|
|
|
303 }
|
|
|
304
|
|
|
305 for (cl = p->in; cl; cl = cl->next) {
|
|
|
306 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
307 "pipe buf in " PTR_FMT ", pos " PTR_FMT ", size: %d",
|
|
|
308 cl->buf->start, cl->buf->pos,
|
|
|
309 cl->buf->last - cl->buf->pos);
|
|
|
310 }
|
|
|
311
|
|
|
312 for (cl = p->busy; cl; cl = cl->next) {
|
|
|
313 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
314 "pipe buf busy " PTR_FMT ", pos " PTR_FMT ", size: %d",
|
|
|
315 cl->buf->start, cl->buf->pos,
|
|
|
316 cl->buf->last - cl->buf->pos);
|
|
|
317 }
|
|
|
318
|
|
|
319 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
|
|
|
320 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
321 "pipe buf free " PTR_FMT ", last " PTR_FMT ", size: %d",
|
|
|
322 cl->buf->start, cl->buf->last,
|
|
|
323 cl->buf->end - cl->buf->last);
|
|
|
324 }
|
|
|
325
|
|
|
326 #endif
|
|
|
327
|
|
|
328 if ((p->upstream_eof || p->upstream_error) && p->free_raw_bufs) {
|
|
|
329
|
|
|
330 /* STUB */ p->free_raw_bufs->buf->num = p->num++;
|
|
|
331
|
|
|
332 if (p->input_filter(p, p->free_raw_bufs->buf) == NGX_ERROR) {
|
|
|
333 return NGX_ABORT;
|
|
|
334 }
|
|
|
335
|
|
|
336 p->free_raw_bufs = p->free_raw_bufs->next;
|
|
|
337
|
|
|
338 if (p->free_bufs) {
|
|
|
339 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
|
|
|
340 ngx_pfree(p->pool, cl->buf->start);
|
|
|
341 }
|
|
|
342 }
|
|
|
343 }
|
|
|
344
|
|
|
345 if (p->cachable && p->in) {
|
|
|
346 if (ngx_event_pipe_write_chain_to_temp_file(p) == NGX_ABORT) {
|
|
|
347 return NGX_ABORT;
|
|
|
348 }
|
|
|
349 }
|
|
|
350
|
|
|
351 return NGX_OK;
|
|
|
352 }
|
|
|
353
|
|
|
354
|
|
|
355 ngx_int_t ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p)
|
|
|
356 {
|
|
|
357 size_t bsize;
|
|
|
358 ngx_uint_t flush;
|
|
|
359 ngx_buf_t *b;
|
|
|
360 ngx_chain_t *out, **ll, *cl, *tl;
|
|
|
361
|
|
|
362 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
363 "pipe write downstream: %d", p->downstream->write->ready);
|
|
|
364
|
|
|
365 for ( ;; ) {
|
|
|
366 if (p->downstream_error) {
|
|
|
367 return ngx_event_pipe_drain_chains(p);
|
|
|
368 }
|
|
|
369
|
|
|
370 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
|
|
|
371
|
|
|
372 /* pass the p->out and p->in chains to the output filter */
|
|
|
373
|
|
|
374 if (p->out) {
|
|
|
375 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
376 "pipe write downstream flush out");
|
|
|
377
|
|
|
378 if (p->output_filter(p->output_ctx, p->out) == NGX_ERROR) {
|
|
|
379 p->downstream_error = 1;
|
|
|
380 return ngx_event_pipe_drain_chains(p);
|
|
|
381 }
|
|
|
382
|
|
|
383 p->out = NULL;
|
|
|
384 }
|
|
|
385
|
|
|
386 if (p->in) {
|
|
|
387 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
388 "pipe write downstream flush in");
|
|
|
389
|
|
|
390 if (p->output_filter(p->output_ctx, p->in) == NGX_ERROR) {
|
|
|
391 p->downstream_error = 1;
|
|
|
392 return ngx_event_pipe_drain_chains(p);
|
|
|
393 }
|
|
|
394
|
|
|
395 p->in = NULL;
|
|
|
396 }
|
|
|
397
|
|
|
398 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
399 "pipe write downstream done");
|
|
|
400
|
|
|
401 /* TODO: free unused bufs */
|
|
|
402
|
|
|
403 p->downstream_done = 1;
|
|
|
404 break;
|
|
|
405 }
|
|
|
406
|
|
|
407 if (!p->downstream->write->ready) {
|
|
|
408 break;
|
|
|
409 }
|
|
|
410
|
|
|
411 /* bsize is the size of the busy bufs */
|
|
|
412
|
|
|
413 bsize = 0;
|
|
|
414
|
|
|
415 for (cl = p->busy; cl; cl = cl->next) {
|
|
|
416 bsize += cl->buf->end - cl->buf->start;
|
|
|
417 }
|
|
|
418
|
|
|
419 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
420 "pipe write busy: " SIZE_T_FMT, bsize);
|
|
|
421
|
|
|
422 out = NULL;
|
|
|
423 ll = NULL;
|
|
|
424 flush = 0;
|
|
|
425
|
|
|
426 for ( ;; ) {
|
|
|
427 if (p->out) {
|
|
|
428 cl = p->out;
|
|
|
429
|
|
|
430 if (bsize + ngx_buf_size(cl->buf) > p->busy_size) {
|
|
|
431 flush = 1;
|
|
|
432 break;
|
|
|
433 }
|
|
|
434
|
|
|
435 p->out = p->out->next;
|
|
|
436 ngx_event_pipe_free_shadow_raw_buf(&p->free_raw_bufs,
|
|
|
437 cl->buf);
|
|
|
438
|
|
|
439 } else if (!p->cachable && p->in) {
|
|
|
440 cl = p->in;
|
|
|
441
|
|
|
442 if (bsize + ngx_buf_size(cl->buf) > p->busy_size) {
|
|
|
443 flush = 1;
|
|
|
444 break;
|
|
|
445 }
|
|
|
446
|
|
|
447 p->in = p->in->next;
|
|
|
448
|
|
|
449 } else {
|
|
|
450 break;
|
|
|
451 }
|
|
|
452
|
|
|
453 bsize += ngx_buf_size(cl->buf);
|
|
|
454 cl->next = NULL;
|
|
|
455 ngx_chain_add_link(out, ll, cl);
|
|
|
456 }
|
|
|
457
|
|
|
458 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
459 "pipe write: out:" PTR_FMT ", f:%d", out, flush);
|
|
|
460
|
|
|
461 if (out == NULL && !flush) {
|
|
|
462 break;
|
|
|
463 }
|
|
|
464
|
|
|
465 if (p->output_filter(p->output_ctx, out) == NGX_ERROR) {
|
|
|
466 p->downstream_error = 1;
|
|
|
467 return ngx_event_pipe_drain_chains(p);
|
|
|
468 }
|
|
|
469
|
|
|
470 ngx_chain_update_chains(&p->free, &p->busy, &out, p->tag);
|
|
|
471
|
|
|
472 for (cl = p->free; cl; cl = cl->next) {
|
|
|
473
|
|
|
474 if (cl->buf->temp_file) {
|
|
|
475 if (p->cachable || !p->cyclic_temp_file) {
|
|
|
476 continue;
|
|
|
477 }
|
|
|
478
|
|
|
479 /* reset p->temp_offset if all bufs had been sent */
|
|
|
480
|
|
|
481 if (cl->buf->file_last == p->temp_file->offset) {
|
|
|
482 p->temp_file->offset = 0;
|
|
|
483 }
|
|
|
484 }
|
|
|
485
|
|
|
486 /* TODO: free buf if p->free_bufs && upstream done */
|
|
|
487
|
|
|
488 /* add the free shadow raw buf to p->free_raw_bufs */
|
|
|
489
|
|
|
490 if (cl->buf->last_shadow) {
|
|
|
491 b = cl->buf->shadow;
|
|
|
492 b->pos = b->last = b->start;
|
|
|
493 b->shadow = NULL;
|
|
|
494 ngx_alloc_link_and_set_buf(tl, b, p->pool, NGX_ABORT);
|
|
|
495 ngx_event_pipe_add_free_buf(&p->free_raw_bufs, tl);
|
|
|
496
|
|
|
497 cl->buf->last_shadow = 0;
|
|
|
498 }
|
|
|
499
|
|
|
500 cl->buf->shadow = NULL;
|
|
|
501 }
|
|
|
502 }
|
|
|
503
|
|
|
504 return NGX_OK;
|
|
|
505 }
|
|
|
506
|
|
|
507
|
|
|
508 static ngx_int_t ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p)
|
|
|
509 {
|
|
|
510 ssize_t size, bsize;
|
|
|
511 ngx_buf_t *b;
|
|
|
512 ngx_chain_t *cl, *tl, *next, *out, **ll, **last_free, fl;
|
|
|
513
|
|
|
514 if (p->buf_to_file) {
|
|
|
515 fl.buf = p->buf_to_file;
|
|
|
516 fl.next = p->in;
|
|
|
517 out = &fl;
|
|
|
518
|
|
|
519 } else {
|
|
|
520 out = p->in;
|
|
|
521 }
|
|
|
522
|
|
|
523 if (!p->cachable) {
|
|
|
524
|
|
|
525 size = 0;
|
|
|
526 cl = out;
|
|
|
527 ll = NULL;
|
|
|
528
|
|
|
529 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
530 "pipe offset: %d", p->temp_file->offset);
|
|
|
531
|
|
|
532 do {
|
|
|
533 bsize = cl->buf->last - cl->buf->pos;
|
|
|
534
|
|
|
535 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
536 "pipe buf " PTR_FMT ", pos " PTR_FMT ", size: %d",
|
|
|
537 cl->buf->start, cl->buf->pos, bsize);
|
|
|
538
|
|
|
539 if ((size + bsize > p->temp_file_write_size)
|
|
|
540 || (p->temp_file->offset + size + bsize > p->max_temp_file_size))
|
|
|
541 {
|
|
|
542 break;
|
|
|
543 }
|
|
|
544
|
|
|
545 size += bsize;
|
|
|
546 ll = &cl->next;
|
|
|
547 cl = cl->next;
|
|
|
548
|
|
|
549 } while (cl);
|
|
|
550
|
|
|
551 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "size: %d", size);
|
|
|
552
|
|
|
553 if (cl) {
|
|
|
554 p->in = cl;
|
|
|
555 *ll = NULL;
|
|
|
556
|
|
|
557 } else {
|
|
|
558 p->in = NULL;
|
|
|
559 p->last_in = &p->in;
|
|
|
560 }
|
|
|
561
|
|
|
562 } else {
|
|
|
563 p->in = NULL;
|
|
|
564 p->last_in = &p->in;
|
|
|
565 }
|
|
|
566
|
|
|
567 if (ngx_write_chain_to_temp_file(p->temp_file, out) == NGX_ERROR) {
|
|
|
568 return NGX_ABORT;
|
|
|
569 }
|
|
|
570
|
|
|
571 for (last_free = &p->free_raw_bufs;
|
|
|
572 *last_free != NULL;
|
|
|
573 last_free = &(*last_free)->next)
|
|
|
574 {
|
|
|
575 /* void */
|
|
|
576 }
|
|
|
577
|
|
|
578 if (p->buf_to_file) {
|
|
|
579 p->temp_file->offset = p->buf_to_file->last - p->buf_to_file->pos;
|
|
|
580 p->buf_to_file = NULL;
|
|
|
581 out = out->next;
|
|
|
582 }
|
|
|
583
|
|
|
584 for (cl = out; cl; cl = next) {
|
|
|
585 next = cl->next;
|
|
|
586 cl->next = NULL;
|
|
|
587
|
|
|
588 b = cl->buf;
|
|
|
589 b->file = &p->temp_file->file;
|
|
|
590 b->file_pos = p->temp_file->offset;
|
|
|
591 p->temp_file->offset += b->last - b->pos;
|
|
|
592 b->file_last = p->temp_file->offset;
|
|
|
593
|
|
|
594 b->in_file = 1;
|
|
|
595 b->temp_file = 1;
|
|
|
596
|
|
|
597 ngx_chain_add_link(p->out, p->last_out, cl);
|
|
|
598
|
|
|
599 if (b->last_shadow) {
|
|
|
600 b->shadow->last = b->shadow->pos = b->shadow->start;
|
|
|
601 ngx_alloc_link_and_set_buf(tl, b->shadow, p->pool, NGX_ABORT);
|
|
|
602 *last_free = tl;
|
|
|
603 last_free = &tl->next;
|
|
|
604 }
|
|
|
605 }
|
|
|
606
|
|
|
607 return NGX_OK;
|
|
|
608 }
|
|
|
609
|
|
|
610
|
|
|
611 /* the copy input filter */
|
|
|
612
|
|
|
613 ngx_int_t ngx_event_pipe_copy_input_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
|
|
|
614 {
|
|
|
615 ngx_buf_t *b;
|
|
|
616 ngx_chain_t *cl;
|
|
|
617
|
|
|
618 if (buf->pos == buf->last) {
|
|
|
619 return NGX_OK;
|
|
|
620 }
|
|
|
621
|
|
|
622 if (p->free) {
|
|
|
623 b = p->free->buf;
|
|
|
624 p->free = p->free->next;
|
|
|
625
|
|
|
626 } else {
|
|
|
627 if (!(b = ngx_alloc_buf(p->pool))) {
|
|
|
628 return NGX_ERROR;
|
|
|
629 }
|
|
|
630 }
|
|
|
631
|
|
|
632 ngx_memcpy(b, buf, sizeof(ngx_buf_t));
|
|
|
633 b->shadow = buf;
|
|
|
634 b->tag = p->tag;
|
|
|
635 b->last_shadow = 1;
|
|
|
636 b->recycled = 1;
|
|
|
637 buf->shadow = b;
|
|
|
638
|
|
|
639 ngx_alloc_link_and_set_buf(cl, b, p->pool, NGX_ERROR);
|
|
|
640
|
|
|
641 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "buf #%d", b->num);
|
|
|
642
|
|
|
643 ngx_chain_add_link(p->in, p->last_in, cl);
|
|
|
644
|
|
|
645 return NGX_OK;
|
|
|
646 }
|
|
|
647
|
|
|
648
|
|
|
649 ngx_inline static void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf)
|
|
|
650 {
|
|
|
651 ngx_buf_t *b, *next;
|
|
|
652
|
|
|
653 if (buf->shadow == NULL) {
|
|
|
654 return;
|
|
|
655 }
|
|
|
656
|
|
|
657 b = buf->shadow;
|
|
|
658
|
|
|
659 while (!b->last_shadow) {
|
|
|
660 next = b->shadow;
|
|
|
661
|
|
|
662 b->in_file = 0;
|
|
|
663 b->temp_file = 0;
|
|
|
664 b->flush = 0;
|
|
|
665 b->zerocopy_busy = 0;
|
|
|
666
|
|
|
667 b->shadow = NULL;
|
|
|
668 b = next;
|
|
|
669 }
|
|
|
670
|
|
|
671 b->in_file = 0;
|
|
|
672 b->temp_file = 0;
|
|
|
673 b->flush = 0;
|
|
|
674 b->zerocopy_busy = 0;
|
|
|
675 b->last_shadow = 0;
|
|
|
676
|
|
|
677 b->shadow = NULL;
|
|
|
678
|
|
|
679 buf->shadow = NULL;
|
|
|
680 }
|
|
|
681
|
|
|
682
|
|
|
683 ngx_inline static void ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free,
|
|
|
684 ngx_buf_t *buf)
|
|
|
685 {
|
|
|
686 ngx_buf_t *s;
|
|
|
687 ngx_chain_t *cl, **ll;
|
|
|
688
|
|
|
689 if (buf->shadow == NULL) {
|
|
|
690 return;
|
|
|
691 }
|
|
|
692
|
|
|
693 for (s = buf->shadow; !s->last_shadow; s = s->shadow) { /* void */ }
|
|
|
694
|
|
|
695 ll = free;
|
|
|
696
|
|
|
697 for (cl = *free ; cl; cl = cl->next) {
|
|
|
698 if (cl->buf == s) {
|
|
|
699 *ll = cl->next;
|
|
|
700 break;
|
|
|
701 }
|
|
|
702
|
|
|
703 if (cl->buf->shadow) {
|
|
|
704 break;
|
|
|
705 }
|
|
|
706
|
|
|
707 ll = &cl->next;
|
|
|
708 }
|
|
|
709 }
|
|
|
710
|
|
|
711
|
|
|
712 ngx_inline static void ngx_event_pipe_add_free_buf(ngx_chain_t **chain,
|
|
|
713 ngx_chain_t *cl)
|
|
|
714 {
|
|
|
715 if (*chain == NULL) {
|
|
|
716 *chain = cl;
|
|
|
717 return;
|
|
|
718 }
|
|
|
719
|
|
|
720 if ((*chain)->buf->pos != (*chain)->buf->last) {
|
|
|
721 cl->next = (*chain)->next;
|
|
|
722 (*chain)->next = cl;
|
|
|
723
|
|
|
724 } else {
|
|
|
725 cl->next = (*chain);
|
|
|
726 (*chain) = cl;
|
|
|
727 }
|
|
|
728 }
|
|
|
729
|
|
|
730
|
|
|
731 static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p)
|
|
|
732 {
|
|
|
733 ngx_buf_t *b;
|
|
|
734 ngx_chain_t *cl, *tl;
|
|
|
735
|
|
|
736 for ( ;; ) {
|
|
|
737 if (p->busy) {
|
|
|
738 cl = p->busy;
|
|
|
739 p->busy = NULL;
|
|
|
740
|
|
|
741 } else if (p->out) {
|
|
|
742 cl = p->out;
|
|
|
743 p->out = NULL;
|
|
|
744
|
|
|
745 } else if (p->in) {
|
|
|
746 cl = p->in;
|
|
|
747 p->in = NULL;
|
|
|
748
|
|
|
749 } else {
|
|
|
750 return NGX_OK;
|
|
|
751 }
|
|
|
752
|
|
|
753 while (cl) {
|
|
|
754 if (cl->buf->last_shadow) {
|
|
|
755 b = cl->buf->shadow;
|
|
|
756 b->pos = b->last = b->start;
|
|
|
757 b->shadow = NULL;
|
|
|
758 ngx_alloc_link_and_set_buf(tl, b, p->pool, NGX_ABORT);
|
|
|
759 ngx_event_pipe_add_free_buf(&p->free_raw_bufs, tl);
|
|
|
760
|
|
|
761 cl->buf->last_shadow = 0;
|
|
|
762 }
|
|
|
763
|
|
|
764 cl->buf->shadow = NULL;
|
|
|
765 tl = cl->next;
|
|
|
766 cl->next = p->free;
|
|
|
767 p->free = cl;
|
|
|
768 cl = tl;
|
|
|
769 }
|
|
|
770 }
|
|
|
771 }
|
