|
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
|
|
|
11
|
|
18
|
12 #if 0
|
|
|
13 #define NGX_SENDFILE_LIMIT 4096
|
|
|
14 #endif
|
|
|
15
|
|
|
16
|
|
|
17 #define NGX_NONE 1
|
|
0
|
18
|
|
|
19
|
|
16
|
20 static ngx_inline ngx_int_t
|
|
0
|
21 ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf);
|
|
18
|
22 static ngx_int_t ngx_output_chain_add_copy(ngx_pool_t *pool,
|
|
48
|
23 ngx_chain_t **chain, ngx_chain_t *in);
|
|
0
|
24 static ngx_int_t ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src,
|
|
48
|
25 ngx_uint_t sendfile);
|
|
0
|
26
|
|
|
27
|
|
48
|
28 ngx_int_t
|
|
|
29 ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in)
|
|
0
|
30 {
|
|
|
31 int rc, last;
|
|
22
|
32 off_t bsize;
|
|
|
33 size_t size;
|
|
0
|
34 ngx_chain_t *cl, *out, **last_out;
|
|
|
35
|
|
4
|
36 if (ctx->in == NULL && ctx->busy == NULL) {
|
|
0
|
37
|
|
18
|
38 /*
|
|
|
39 * the short path for the case when the ctx->in and ctx->busy chains
|
|
|
40 * are empty, the incoming chain is empty too or has the single buf
|
|
|
41 * that does not require the copy
|
|
|
42 */
|
|
0
|
43
|
|
|
44 if (in == NULL) {
|
|
|
45 return ctx->output_filter(ctx->filter_ctx, in);
|
|
|
46 }
|
|
|
47
|
|
|
48 if (in->next == NULL
|
|
18
|
49 #if (NGX_SENDFILE_LIMIT)
|
|
|
50 && !(in->buf->in_file && in->buf->file_last > NGX_SENDFILE_LIMIT)
|
|
|
51 #endif
|
|
0
|
52 && (!ngx_output_chain_need_to_copy(ctx, in->buf)))
|
|
|
53 {
|
|
|
54 return ctx->output_filter(ctx->filter_ctx, in);
|
|
|
55 }
|
|
|
56 }
|
|
|
57
|
|
|
58 /* add the incoming buf to the chain ctx->in */
|
|
|
59
|
|
|
60 if (in) {
|
|
18
|
61 if (ngx_output_chain_add_copy(ctx->pool, &ctx->in, in) == NGX_ERROR) {
|
|
0
|
62 return NGX_ERROR;
|
|
|
63 }
|
|
|
64 }
|
|
|
65
|
|
|
66 out = NULL;
|
|
|
67 last_out = &out;
|
|
48
|
68 last = NGX_NONE;
|
|
0
|
69
|
|
|
70 for ( ;; ) {
|
|
|
71
|
|
|
72 while (ctx->in) {
|
|
|
73
|
|
|
74 /*
|
|
|
75 * cycle while there are the ctx->in bufs
|
|
|
76 * or there are the free output bufs to copy in
|
|
|
77 */
|
|
|
78
|
|
|
79 bsize = ngx_buf_size(ctx->in->buf);
|
|
|
80
|
|
|
81 if (bsize == 0 && !ngx_buf_special(ctx->in->buf)) {
|
|
|
82
|
|
|
83 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0,
|
|
32
|
84 "zero size buf in output "
|
|
|
85 "t:%d r:%d f:%d %p %p-%p %p %O-%O",
|
|
|
86 ctx->in->buf->temporary,
|
|
|
87 ctx->in->buf->recycled,
|
|
|
88 ctx->in->buf->in_file,
|
|
|
89 ctx->in->buf->start,
|
|
|
90 ctx->in->buf->pos,
|
|
|
91 ctx->in->buf->last,
|
|
|
92 ctx->in->buf->file,
|
|
|
93 ctx->in->buf->file_pos,
|
|
|
94 ctx->in->buf->file_last);
|
|
0
|
95
|
|
22
|
96 ngx_debug_point();
|
|
|
97
|
|
0
|
98 ctx->in = ctx->in->next;
|
|
|
99
|
|
|
100 continue;
|
|
|
101 }
|
|
|
102
|
|
|
103 if (!ngx_output_chain_need_to_copy(ctx, ctx->in->buf)) {
|
|
|
104
|
|
|
105 /* move the chain link to the output chain */
|
|
|
106
|
|
|
107 cl = ctx->in;
|
|
|
108 ctx->in = cl->next;
|
|
|
109
|
|
|
110 *last_out = cl;
|
|
|
111 last_out = &cl->next;
|
|
|
112 cl->next = NULL;
|
|
|
113
|
|
|
114 continue;
|
|
|
115 }
|
|
|
116
|
|
|
117 if (ctx->buf == NULL) {
|
|
|
118
|
|
|
119 /* get the free buf */
|
|
|
120
|
|
|
121 if (ctx->free) {
|
|
56
|
122 cl = ctx->free;
|
|
|
123 ctx->buf = cl->buf;
|
|
|
124 ctx->free = cl->next;
|
|
|
125 ngx_free_chain(ctx->pool, cl);
|
|
0
|
126
|
|
|
127 } else if (out || ctx->allocated == ctx->bufs.num) {
|
|
|
128
|
|
|
129 break;
|
|
|
130
|
|
|
131 } else {
|
|
|
132
|
|
|
133 size = ctx->bufs.size;
|
|
|
134
|
|
|
135 if (ctx->in->buf->last_buf) {
|
|
|
136
|
|
22
|
137 if (bsize < (off_t) ctx->bufs.size) {
|
|
0
|
138
|
|
|
139 /*
|
|
|
140 * allocate small temp buf for the small last buf
|
|
|
141 * or its small last part
|
|
|
142 */
|
|
|
143
|
|
22
|
144 size = (size_t) bsize;
|
|
0
|
145
|
|
|
146 } else if (ctx->bufs.num == 1
|
|
22
|
147 && (bsize < (off_t) (ctx->bufs.size
|
|
|
148 + (ctx->bufs.size >> 2))))
|
|
0
|
149 {
|
|
|
150 /*
|
|
|
151 * allocate a temp buf that equals
|
|
|
152 * to the last buf if the last buf size is lesser
|
|
|
153 * than 1.25 of bufs.size and a temp buf is single
|
|
|
154 */
|
|
|
155
|
|
22
|
156 size = (size_t) bsize;
|
|
0
|
157 }
|
|
|
158 }
|
|
|
159
|
|
50
|
160 ctx->buf = ngx_create_temp_buf(ctx->pool, size);
|
|
|
161 if (ctx->buf == NULL) {
|
|
0
|
162 return NGX_ERROR;
|
|
|
163 }
|
|
|
164
|
|
|
165 ctx->buf->tag = ctx->tag;
|
|
|
166 ctx->buf->recycled = 1;
|
|
|
167 ctx->allocated++;
|
|
|
168 }
|
|
|
169 }
|
|
|
170
|
|
|
171 rc = ngx_output_chain_copy_buf(ctx->buf, ctx->in->buf,
|
|
|
172 ctx->sendfile);
|
|
|
173
|
|
|
174 if (rc == NGX_ERROR) {
|
|
|
175 return rc;
|
|
|
176 }
|
|
|
177
|
|
|
178 if (rc == NGX_AGAIN) {
|
|
|
179 if (out) {
|
|
|
180 break;
|
|
|
181 }
|
|
|
182
|
|
|
183 return rc;
|
|
|
184 }
|
|
|
185
|
|
|
186 /* delete the completed buf from the ctx->in chain */
|
|
|
187
|
|
|
188 if (ngx_buf_size(ctx->in->buf) == 0) {
|
|
|
189 ctx->in = ctx->in->next;
|
|
|
190 }
|
|
|
191
|
|
50
|
192 cl = ngx_alloc_chain_link(ctx->pool);
|
|
|
193 if (cl == NULL) {
|
|
10
|
194 return NGX_ERROR;
|
|
|
195 }
|
|
50
|
196
|
|
10
|
197 cl->buf = ctx->buf;
|
|
|
198 cl->next = NULL;
|
|
0
|
199 *last_out = cl;
|
|
|
200 last_out = &cl->next;
|
|
|
201 ctx->buf = NULL;
|
|
|
202 }
|
|
|
203
|
|
|
204 if (out == NULL && last != NGX_NONE) {
|
|
|
205 return last;
|
|
|
206 }
|
|
|
207
|
|
|
208 last = ctx->output_filter(ctx->filter_ctx, out);
|
|
|
209
|
|
|
210 ngx_chain_update_chains(&ctx->free, &ctx->busy, &out, ctx->tag);
|
|
|
211 last_out = &out;
|
|
|
212
|
|
|
213 if (last == NGX_ERROR) {
|
|
|
214 return last;
|
|
|
215 }
|
|
|
216 }
|
|
|
217 }
|
|
|
218
|
|
|
219
|
|
16
|
220 static ngx_inline ngx_int_t
|
|
48
|
221 ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf)
|
|
0
|
222 {
|
|
18
|
223 ngx_uint_t sendfile;
|
|
|
224
|
|
0
|
225 if (ngx_buf_special(buf)) {
|
|
|
226 return 0;
|
|
|
227 }
|
|
|
228
|
|
18
|
229 sendfile = ctx->sendfile;
|
|
|
230
|
|
|
231 #if (NGX_SENDFILE_LIMIT)
|
|
|
232
|
|
|
233 if (buf->in_file && buf->file_pos >= NGX_SENDFILE_LIMIT) {
|
|
|
234 sendfile = 0;
|
|
|
235 }
|
|
|
236
|
|
|
237 #endif
|
|
|
238
|
|
|
239 if (!sendfile) {
|
|
4
|
240
|
|
0
|
241 if (!ngx_buf_in_memory(buf)) {
|
|
|
242 return 1;
|
|
|
243 }
|
|
|
244
|
|
|
245 buf->in_file = 0;
|
|
|
246 }
|
|
|
247
|
|
|
248 if (ctx->need_in_memory && !ngx_buf_in_memory(buf)) {
|
|
|
249 return 1;
|
|
|
250 }
|
|
|
251
|
|
|
252 if (ctx->need_in_temp && (buf->memory || buf->mmap)) {
|
|
|
253 return 1;
|
|
|
254 }
|
|
|
255
|
|
|
256 return 0;
|
|
|
257 }
|
|
|
258
|
|
|
259
|
|
48
|
260 static ngx_int_t
|
|
|
261 ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain,
|
|
|
262 ngx_chain_t *in)
|
|
18
|
263 {
|
|
|
264 ngx_chain_t *cl, **ll;
|
|
|
265 #if (NGX_SENDFILE_LIMIT)
|
|
|
266 ngx_buf_t *b, *buf;
|
|
|
267 #endif
|
|
|
268
|
|
|
269 ll = chain;
|
|
|
270
|
|
|
271 for (cl = *chain; cl; cl = cl->next) {
|
|
|
272 ll = &cl->next;
|
|
|
273 }
|
|
|
274
|
|
|
275 while (in) {
|
|
|
276
|
|
50
|
277 cl = ngx_alloc_chain_link(pool);
|
|
|
278 if (cl == NULL) {
|
|
18
|
279 return NGX_ERROR;
|
|
|
280 }
|
|
|
281
|
|
|
282 #if (NGX_SENDFILE_LIMIT)
|
|
|
283
|
|
|
284 buf = in->buf;
|
|
|
285
|
|
|
286 if (buf->in_file
|
|
|
287 && buf->file_pos < NGX_SENDFILE_LIMIT
|
|
|
288 && buf->file_last > NGX_SENDFILE_LIMIT)
|
|
|
289 {
|
|
50
|
290 b = ngx_calloc_buf(pool);
|
|
|
291 if (b == NULL) {
|
|
18
|
292 return NGX_ERROR;
|
|
|
293 }
|
|
|
294
|
|
|
295 ngx_memcpy(b, buf, sizeof(ngx_buf_t));
|
|
|
296
|
|
|
297 if (ngx_buf_in_memory(buf)) {
|
|
|
298 buf->pos += (ssize_t) (NGX_SENDFILE_LIMIT - buf->file_pos);
|
|
|
299 b->last = buf->pos;
|
|
|
300 }
|
|
|
301
|
|
|
302 buf->file_pos = NGX_SENDFILE_LIMIT;
|
|
|
303 b->file_last = NGX_SENDFILE_LIMIT;
|
|
|
304
|
|
|
305 cl->buf = b;
|
|
|
306
|
|
|
307 } else {
|
|
|
308 cl->buf = buf;
|
|
|
309 in = in->next;
|
|
|
310 }
|
|
|
311
|
|
|
312 #else
|
|
|
313 cl->buf = in->buf;
|
|
|
314 in = in->next;
|
|
|
315
|
|
|
316 #endif
|
|
|
317
|
|
|
318 *ll = cl;
|
|
|
319 ll = &cl->next;
|
|
|
320 }
|
|
|
321
|
|
|
322 *ll = NULL;
|
|
|
323
|
|
|
324 return NGX_OK;
|
|
|
325 }
|
|
|
326
|
|
|
327
|
|
48
|
328 static ngx_int_t
|
|
|
329 ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, ngx_uint_t sendfile)
|
|
0
|
330 {
|
|
22
|
331 off_t size;
|
|
0
|
332 ssize_t n;
|
|
|
333
|
|
|
334 size = ngx_buf_size(src);
|
|
|
335
|
|
22
|
336 if (size > dst->end - dst->pos) {
|
|
0
|
337 size = dst->end - dst->pos;
|
|
|
338 }
|
|
|
339
|
|
18
|
340 #if (NGX_SENDFILE_LIMIT)
|
|
|
341
|
|
|
342 if (src->in_file && src->file_pos >= NGX_SENDFILE_LIMIT) {
|
|
|
343 sendfile = 0;
|
|
|
344 }
|
|
|
345
|
|
|
346 #endif
|
|
|
347
|
|
0
|
348 if (ngx_buf_in_memory(src)) {
|
|
22
|
349 ngx_memcpy(dst->pos, src->pos, (size_t) size);
|
|
|
350 src->pos += (size_t) size;
|
|
|
351 dst->last += (size_t) size;
|
|
0
|
352
|
|
4
|
353 if (src->in_file) {
|
|
|
354
|
|
|
355 if (sendfile) {
|
|
|
356 dst->in_file = 1;
|
|
|
357 dst->file = src->file;
|
|
|
358 dst->file_pos = src->file_pos;
|
|
|
359 dst->file_last = src->file_pos + size;
|
|
|
360
|
|
|
361 } else {
|
|
|
362 dst->in_file = 0;
|
|
|
363 }
|
|
|
364
|
|
0
|
365 src->file_pos += size;
|
|
2
|
366
|
|
|
367 } else {
|
|
|
368 dst->in_file = 0;
|
|
0
|
369 }
|
|
|
370
|
|
|
371 if (src->last_buf && src->pos == src->last) {
|
|
|
372 dst->last_buf = 1;
|
|
|
373 }
|
|
|
374
|
|
|
375 } else {
|
|
22
|
376 n = ngx_read_file(src->file, dst->pos, (size_t) size, src->file_pos);
|
|
0
|
377
|
|
|
378 if (n == NGX_ERROR) {
|
|
|
379 return n;
|
|
|
380 }
|
|
|
381
|
|
|
382 #if (NGX_FILE_AIO_READ)
|
|
|
383 if (n == NGX_AGAIN) {
|
|
|
384 return n;
|
|
|
385 }
|
|
|
386 #endif
|
|
|
387
|
|
22
|
388 if (n != size) {
|
|
0
|
389 ngx_log_error(NGX_LOG_ALERT, src->file->log, 0,
|
|
22
|
390 ngx_read_file_n " reads only %z of %O from file",
|
|
0
|
391 n, size);
|
|
|
392 if (n == 0) {
|
|
|
393 return NGX_ERROR;
|
|
|
394 }
|
|
|
395 }
|
|
|
396
|
|
|
397 dst->last += n;
|
|
|
398
|
|
2
|
399 if (sendfile) {
|
|
|
400 dst->in_file = 1;
|
|
|
401 dst->file = src->file;
|
|
|
402 dst->file_pos = src->file_pos;
|
|
4
|
403 dst->file_last = src->file_pos + n;
|
|
2
|
404
|
|
|
405 } else {
|
|
0
|
406 dst->in_file = 0;
|
|
|
407 }
|
|
|
408
|
|
4
|
409 src->file_pos += n;
|
|
|
410
|
|
0
|
411 if (src->last_buf && src->file_pos == src->file_last) {
|
|
|
412 dst->last_buf = 1;
|
|
|
413 }
|
|
|
414 }
|
|
|
415
|
|
|
416 return NGX_OK;
|
|
|
417 }
|
|
|
418
|
|
|
419
|
|
48
|
420 ngx_int_t
|
|
|
421 ngx_chain_writer(void *data, ngx_chain_t *in)
|
|
0
|
422 {
|
|
|
423 ngx_chain_writer_ctx_t *ctx = data;
|
|
|
424
|
|
22
|
425 off_t size;
|
|
0
|
426 ngx_chain_t *cl;
|
|
|
427
|
|
22
|
428 for (size = 0; in; in = in->next) {
|
|
|
429
|
|
|
430 #if 1
|
|
|
431 if (ngx_buf_size(in->buf) == 0 && !ngx_buf_special(in->buf)) {
|
|
|
432 ngx_debug_point();
|
|
|
433 }
|
|
|
434 #endif
|
|
|
435
|
|
|
436 size += ngx_buf_size(in->buf);
|
|
0
|
437
|
|
|
438 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0,
|
|
10
|
439 "chain writer buf size: %uz", ngx_buf_size(in->buf));
|
|
0
|
440
|
|
50
|
441 cl = ngx_alloc_chain_link(ctx->pool);
|
|
|
442 if (cl == NULL) {
|
|
10
|
443 return NGX_ERROR;
|
|
|
444 }
|
|
50
|
445
|
|
10
|
446 cl->buf = in->buf;
|
|
|
447 cl->next = NULL;
|
|
0
|
448 *ctx->last = cl;
|
|
|
449 ctx->last = &cl->next;
|
|
|
450 }
|
|
|
451
|
|
|
452 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0,
|
|
10
|
453 "chain writer in: %p", ctx->out);
|
|
0
|
454
|
|
22
|
455 for (cl = ctx->out; cl; cl = cl->next) {
|
|
|
456
|
|
|
457 #if 1
|
|
|
458 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) {
|
|
|
459 ngx_debug_point();
|
|
|
460 }
|
|
|
461
|
|
|
462 #endif
|
|
|
463
|
|
|
464 size += ngx_buf_size(cl->buf);
|
|
|
465 }
|
|
|
466
|
|
|
467 if (size == 0) {
|
|
|
468 return NGX_OK;
|
|
|
469 }
|
|
|
470
|
|
0
|
471 ctx->out = ngx_send_chain(ctx->connection, ctx->out, ctx->limit);
|
|
|
472
|
|
|
473 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0,
|
|
10
|
474 "chain writer out: %p", ctx->out);
|
|
0
|
475
|
|
|
476 if (ctx->out == NGX_CHAIN_ERROR) {
|
|
|
477 return NGX_ERROR;
|
|
|
478 }
|
|
|
479
|
|
|
480 if (ctx->out == NULL) {
|
|
|
481 ctx->last = &ctx->out;
|
|
|
482 return NGX_OK;
|
|
|
483 }
|
|
|
484
|
|
|
485 return NGX_AGAIN;
|
|
|
486 }
|
