Mercurial > hg > nginx
annotate src/stream/ngx_stream_write_filter_module.c @ 9331:dbf76fdd109f default tip
release-1.27.4 tag
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 03 Sep 2024 13:11:25 +0300 |
parents | 113e2438dbd4 |
children |
rev | line source |
---|---|
6692 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 * Copyright (C) Nginx, Inc. | |
5 */ | |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_stream.h> | |
11 | |
12 | |
13 typedef struct { | |
14 ngx_chain_t *from_upstream; | |
15 ngx_chain_t *from_downstream; | |
16 } ngx_stream_write_filter_ctx_t; | |
17 | |
18 | |
19 static ngx_int_t ngx_stream_write_filter(ngx_stream_session_t *s, | |
20 ngx_chain_t *in, ngx_uint_t from_upstream); | |
21 static ngx_int_t ngx_stream_write_filter_init(ngx_conf_t *cf); | |
22 | |
23 | |
24 static ngx_stream_module_t ngx_stream_write_filter_module_ctx = { | |
25 NULL, /* preconfiguration */ | |
26 ngx_stream_write_filter_init, /* postconfiguration */ | |
27 | |
28 NULL, /* create main configuration */ | |
29 NULL, /* init main configuration */ | |
30 | |
31 NULL, /* create server configuration */ | |
32 NULL /* merge server configuration */ | |
33 }; | |
34 | |
35 | |
36 ngx_module_t ngx_stream_write_filter_module = { | |
37 NGX_MODULE_V1, | |
38 &ngx_stream_write_filter_module_ctx, /* module context */ | |
39 NULL, /* module directives */ | |
40 NGX_STREAM_MODULE, /* module type */ | |
41 NULL, /* init master */ | |
42 NULL, /* init module */ | |
43 NULL, /* init process */ | |
44 NULL, /* init thread */ | |
45 NULL, /* exit thread */ | |
46 NULL, /* exit process */ | |
47 NULL, /* exit master */ | |
48 NGX_MODULE_V1_PADDING | |
49 }; | |
50 | |
51 | |
52 static ngx_int_t | |
53 ngx_stream_write_filter(ngx_stream_session_t *s, ngx_chain_t *in, | |
54 ngx_uint_t from_upstream) | |
55 { | |
56 off_t size; | |
57 ngx_uint_t last, flush, sync; | |
58 ngx_chain_t *cl, *ln, **ll, **out, *chain; | |
59 ngx_connection_t *c; | |
60 ngx_stream_write_filter_ctx_t *ctx; | |
61 | |
62 ctx = ngx_stream_get_module_ctx(s, ngx_stream_write_filter_module); | |
63 | |
64 if (ctx == NULL) { | |
65 ctx = ngx_pcalloc(s->connection->pool, | |
66 sizeof(ngx_stream_write_filter_ctx_t)); | |
67 if (ctx == NULL) { | |
68 return NGX_ERROR; | |
69 } | |
70 | |
71 ngx_stream_set_ctx(s, ctx, ngx_stream_write_filter_module); | |
72 } | |
73 | |
74 if (from_upstream) { | |
75 c = s->connection; | |
76 out = &ctx->from_upstream; | |
77 | |
78 } else { | |
79 c = s->upstream->peer.connection; | |
80 out = &ctx->from_downstream; | |
81 } | |
82 | |
83 if (c->error) { | |
84 return NGX_ERROR; | |
85 } | |
86 | |
87 size = 0; | |
88 flush = 0; | |
89 sync = 0; | |
90 last = 0; | |
91 ll = out; | |
92 | |
93 /* find the size, the flush point and the last link of the saved chain */ | |
94 | |
95 for (cl = *out; cl; cl = cl->next) { | |
96 ll = &cl->next; | |
97 | |
98 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
99 "write old buf t:%d f:%d %p, pos %p, size: %z " | |
100 "file: %O, size: %O", | |
101 cl->buf->temporary, cl->buf->in_file, | |
102 cl->buf->start, cl->buf->pos, | |
103 cl->buf->last - cl->buf->pos, | |
104 cl->buf->file_pos, | |
105 cl->buf->file_last - cl->buf->file_pos); | |
106 | |
107 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
108 ngx_log_error(NGX_LOG_ALERT, c->log, 0, | |
109 "zero size buf in writer " | |
110 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
111 cl->buf->temporary, | |
112 cl->buf->recycled, | |
113 cl->buf->in_file, | |
114 cl->buf->start, | |
115 cl->buf->pos, | |
116 cl->buf->last, | |
117 cl->buf->file, | |
118 cl->buf->file_pos, | |
119 cl->buf->file_last); | |
120 | |
121 ngx_debug_point(); | |
122 return NGX_ERROR; | |
123 } | |
7401
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
124 |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
125 if (ngx_buf_size(cl->buf) < 0) { |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
126 ngx_log_error(NGX_LOG_ALERT, c->log, 0, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
127 "negative size buf in writer " |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
128 "t:%d r:%d f:%d %p %p-%p %p %O-%O", |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
129 cl->buf->temporary, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
130 cl->buf->recycled, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
131 cl->buf->in_file, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
132 cl->buf->start, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
133 cl->buf->pos, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
134 cl->buf->last, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
135 cl->buf->file, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
136 cl->buf->file_pos, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
137 cl->buf->file_last); |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
138 |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
139 ngx_debug_point(); |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
140 return NGX_ERROR; |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
141 } |
6692 | 142 |
143 size += ngx_buf_size(cl->buf); | |
144 | |
145 if (cl->buf->flush || cl->buf->recycled) { | |
146 flush = 1; | |
147 } | |
148 | |
149 if (cl->buf->sync) { | |
150 sync = 1; | |
151 } | |
152 | |
153 if (cl->buf->last_buf) { | |
154 last = 1; | |
155 } | |
156 } | |
157 | |
158 /* add the new chain to the existent one */ | |
159 | |
160 for (ln = in; ln; ln = ln->next) { | |
161 cl = ngx_alloc_chain_link(c->pool); | |
162 if (cl == NULL) { | |
163 return NGX_ERROR; | |
164 } | |
165 | |
166 cl->buf = ln->buf; | |
167 *ll = cl; | |
168 ll = &cl->next; | |
169 | |
170 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
171 "write new buf t:%d f:%d %p, pos %p, size: %z " | |
172 "file: %O, size: %O", | |
173 cl->buf->temporary, cl->buf->in_file, | |
174 cl->buf->start, cl->buf->pos, | |
175 cl->buf->last - cl->buf->pos, | |
176 cl->buf->file_pos, | |
177 cl->buf->file_last - cl->buf->file_pos); | |
178 | |
179 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
180 ngx_log_error(NGX_LOG_ALERT, c->log, 0, | |
181 "zero size buf in writer " | |
182 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
183 cl->buf->temporary, | |
184 cl->buf->recycled, | |
185 cl->buf->in_file, | |
186 cl->buf->start, | |
187 cl->buf->pos, | |
188 cl->buf->last, | |
189 cl->buf->file, | |
190 cl->buf->file_pos, | |
191 cl->buf->file_last); | |
192 | |
193 ngx_debug_point(); | |
194 return NGX_ERROR; | |
195 } | |
7401
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
196 |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
197 if (ngx_buf_size(cl->buf) < 0) { |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
198 ngx_log_error(NGX_LOG_ALERT, c->log, 0, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
199 "negative size buf in writer " |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
200 "t:%d r:%d f:%d %p %p-%p %p %O-%O", |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
201 cl->buf->temporary, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
202 cl->buf->recycled, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
203 cl->buf->in_file, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
204 cl->buf->start, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
205 cl->buf->pos, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
206 cl->buf->last, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
207 cl->buf->file, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
208 cl->buf->file_pos, |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
209 cl->buf->file_last); |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
210 |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
211 ngx_debug_point(); |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
212 return NGX_ERROR; |
a7ff19afbb14
Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6692
diff
changeset
|
213 } |
6692 | 214 |
215 size += ngx_buf_size(cl->buf); | |
216 | |
217 if (cl->buf->flush || cl->buf->recycled) { | |
218 flush = 1; | |
219 } | |
220 | |
221 if (cl->buf->sync) { | |
222 sync = 1; | |
223 } | |
224 | |
225 if (cl->buf->last_buf) { | |
226 last = 1; | |
227 } | |
228 } | |
229 | |
230 *ll = NULL; | |
231 | |
232 ngx_log_debug3(NGX_LOG_DEBUG_STREAM, c->log, 0, | |
233 "stream write filter: l:%ui f:%ui s:%O", last, flush, size); | |
234 | |
235 if (size == 0 | |
236 && !(c->buffered & NGX_LOWLEVEL_BUFFERED) | |
7665
d127837c714f
Stream: fixed processing of zero length UDP packets (ticket #1982).
Vladimir Homutov <vl@nginx.com>
parents:
7401
diff
changeset
|
237 && !(last && c->need_last_buf) |
8006
32b0ba4855a6
HTTP/2: made it possible to flush response headers (ticket #1743).
Maxim Dounin <mdounin@mdounin.ru>
parents:
7665
diff
changeset
|
238 && !(flush && c->need_flush_buf)) |
6692 | 239 { |
240 if (last || flush || sync) { | |
241 for (cl = *out; cl; /* void */) { | |
242 ln = cl; | |
243 cl = cl->next; | |
244 ngx_free_chain(c->pool, ln); | |
245 } | |
246 | |
247 *out = NULL; | |
248 c->buffered &= ~NGX_STREAM_WRITE_BUFFERED; | |
249 | |
250 return NGX_OK; | |
251 } | |
252 | |
253 ngx_log_error(NGX_LOG_ALERT, c->log, 0, | |
254 "the stream output chain is empty"); | |
255 | |
256 ngx_debug_point(); | |
257 | |
258 return NGX_ERROR; | |
259 } | |
260 | |
261 chain = c->send_chain(c, *out, 0); | |
262 | |
263 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, | |
264 "stream write filter %p", chain); | |
265 | |
266 if (chain == NGX_CHAIN_ERROR) { | |
267 c->error = 1; | |
268 return NGX_ERROR; | |
269 } | |
270 | |
271 for (cl = *out; cl && cl != chain; /* void */) { | |
272 ln = cl; | |
273 cl = cl->next; | |
274 ngx_free_chain(c->pool, ln); | |
275 } | |
276 | |
277 *out = chain; | |
278 | |
279 if (chain) { | |
9106
113e2438dbd4
Stream: removed QUIC support.
Roman Arutyunyan <arut@nginx.com>
parents:
9088
diff
changeset
|
280 if (c->shared) { |
6692 | 281 ngx_log_error(NGX_LOG_ALERT, c->log, 0, |
282 "shared connection is busy"); | |
283 return NGX_ERROR; | |
284 } | |
285 | |
286 c->buffered |= NGX_STREAM_WRITE_BUFFERED; | |
287 return NGX_AGAIN; | |
288 } | |
289 | |
290 c->buffered &= ~NGX_STREAM_WRITE_BUFFERED; | |
291 | |
292 if (c->buffered & NGX_LOWLEVEL_BUFFERED) { | |
293 return NGX_AGAIN; | |
294 } | |
295 | |
296 return NGX_OK; | |
297 } | |
298 | |
299 | |
300 static ngx_int_t | |
301 ngx_stream_write_filter_init(ngx_conf_t *cf) | |
302 { | |
303 ngx_stream_top_filter = ngx_stream_write_filter; | |
304 | |
305 return NGX_OK; | |
306 } |