Mercurial > hg > nginx-quic
annotate src/core/ngx_output_chain.c @ 6133:af7eba90645d
Win32: shared memory base addresses and remapping.
Two mechanisms are implemented to make it possible to store pointers
in shared memory on Windows, in particular on Windows Vista and later
versions with ASLR:
- The ngx_shm_remap() function added to allow remapping of a shared memory
zone to the address originally used for it in the master process. While
important, it doesn't solve the problem by itself as in many cases it's
not possible to use the address because of conflicts with other
allocations.
- We now create mappings at the same address in all processes by starting
mappings at predefined addresses normally unused by newborn processes.
These two mechanisms combined allow to use shared memory on Windows
almost without problems, including reloads.
Based on the patch by Sergey Brester:
http://mailman.nginx.org/pipermail/nginx-devel/2015-April/006836.html
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 27 Apr 2015 18:25:42 +0300 |
parents | 66176dfea01e |
children | c5f81dcf97a7 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 |
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12 |
469 | 13 #if 0 |
14 #define NGX_SENDFILE_LIMIT 4096 | |
15 #endif | |
16 | |
2316 | 17 /* |
18 * When DIRECTIO is enabled FreeBSD, Solaris, and MacOSX read directly | |
19 * to an application memory from a device if parameters are aligned | |
3053 | 20 * to device sector boundary (512 bytes). They fallback to usual read |
2316 | 21 * operation if the parameters are not aligned. |
22 * Linux allows DIRECTIO only if the parameters are aligned to a filesystem | |
23 * sector boundary, otherwise it returns EINVAL. The sector size is | |
24 * usually 512 bytes, however, on XFS it may be 4096 bytes. | |
25 */ | |
469 | 26 |
27 #define NGX_NONE 1 | |
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28 |
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29 |
467 | 30 static ngx_inline ngx_int_t |
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31 ngx_output_chain_as_is(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf); |
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32 #if (NGX_HAVE_AIO_SENDFILE) |
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33 static ngx_int_t ngx_output_chain_aio_setup(ngx_output_chain_ctx_t *ctx, |
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34 ngx_file_t *file); |
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35 #endif |
469 | 36 static ngx_int_t ngx_output_chain_add_copy(ngx_pool_t *pool, |
499 | 37 ngx_chain_t **chain, ngx_chain_t *in); |
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38 static ngx_int_t ngx_output_chain_align_file_buf(ngx_output_chain_ctx_t *ctx, |
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39 off_t bsize); |
2230 | 40 static ngx_int_t ngx_output_chain_get_buf(ngx_output_chain_ctx_t *ctx, |
41 off_t bsize); | |
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42 static ngx_int_t ngx_output_chain_copy_buf(ngx_output_chain_ctx_t *ctx); |
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43 |
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44 |
499 | 45 ngx_int_t |
46 ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in) | |
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47 { |
473 | 48 off_t bsize; |
597 | 49 ngx_int_t rc, last; |
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50 ngx_chain_t *cl, *out, **last_out; |
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51 |
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52 if (ctx->in == NULL && ctx->busy == NULL |
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53 #if (NGX_HAVE_FILE_AIO || NGX_THREADS) |
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54 && !ctx->aio |
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55 #endif |
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56 ) |
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57 { |
469 | 58 /* |
59 * the short path for the case when the ctx->in and ctx->busy chains | |
60 * are empty, the incoming chain is empty too or has the single buf | |
61 * that does not require the copy | |
62 */ | |
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63 |
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64 if (in == NULL) { |
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65 return ctx->output_filter(ctx->filter_ctx, in); |
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66 } |
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67 |
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68 if (in->next == NULL |
469 | 69 #if (NGX_SENDFILE_LIMIT) |
70 && !(in->buf->in_file && in->buf->file_last > NGX_SENDFILE_LIMIT) | |
71 #endif | |
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72 && ngx_output_chain_as_is(ctx, in->buf)) |
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73 { |
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74 return ctx->output_filter(ctx->filter_ctx, in); |
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75 } |
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76 } |
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77 |
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78 /* add the incoming buf to the chain ctx->in */ |
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79 |
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80 if (in) { |
469 | 81 if (ngx_output_chain_add_copy(ctx->pool, &ctx->in, in) == NGX_ERROR) { |
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82 return NGX_ERROR; |
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83 } |
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84 } |
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85 |
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86 out = NULL; |
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87 last_out = &out; |
499 | 88 last = NGX_NONE; |
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89 |
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90 for ( ;; ) { |
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91 |
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92 #if (NGX_HAVE_FILE_AIO || NGX_THREADS) |
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93 if (ctx->aio) { |
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94 return NGX_AGAIN; |
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95 } |
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96 #endif |
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97 |
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98 while (ctx->in) { |
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99 |
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100 /* |
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101 * cycle while there are the ctx->in bufs |
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102 * and there are the free output bufs to copy in |
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103 */ |
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104 |
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105 bsize = ngx_buf_size(ctx->in->buf); |
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106 |
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107 if (bsize == 0 && !ngx_buf_special(ctx->in->buf)) { |
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108 |
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109 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
483 | 110 "zero size buf in output " |
111 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
112 ctx->in->buf->temporary, | |
113 ctx->in->buf->recycled, | |
114 ctx->in->buf->in_file, | |
115 ctx->in->buf->start, | |
116 ctx->in->buf->pos, | |
117 ctx->in->buf->last, | |
118 ctx->in->buf->file, | |
119 ctx->in->buf->file_pos, | |
120 ctx->in->buf->file_last); | |
403
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121 |
473 | 122 ngx_debug_point(); |
123 | |
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124 ctx->in = ctx->in->next; |
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125 |
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126 continue; |
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127 } |
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128 |
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129 if (ngx_output_chain_as_is(ctx, ctx->in->buf)) { |
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130 |
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131 /* move the chain link to the output chain */ |
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132 |
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133 cl = ctx->in; |
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134 ctx->in = cl->next; |
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135 |
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136 *last_out = cl; |
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137 last_out = &cl->next; |
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138 cl->next = NULL; |
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139 |
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140 continue; |
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141 } |
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142 |
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143 if (ctx->buf == NULL) { |
160
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144 |
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145 rc = ngx_output_chain_align_file_buf(ctx, bsize); |
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146 |
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147 if (rc == NGX_ERROR) { |
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148 return NGX_ERROR; |
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149 } |
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150 |
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151 if (rc != NGX_OK) { |
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152 |
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153 if (ctx->free) { |
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154 |
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155 /* get the free buf */ |
160
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156 |
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157 cl = ctx->free; |
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158 ctx->buf = cl->buf; |
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159 ctx->free = cl->next; |
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160 |
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161 ngx_free_chain(ctx->pool, cl); |
160
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162 |
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163 } else if (out || ctx->allocated == ctx->bufs.num) { |
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164 |
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165 break; |
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166 |
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167 } else if (ngx_output_chain_get_buf(ctx, bsize) != NGX_OK) { |
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168 return NGX_ERROR; |
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169 } |
160
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170 } |
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171 } |
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172 |
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173 rc = ngx_output_chain_copy_buf(ctx); |
160
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174 |
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175 if (rc == NGX_ERROR) { |
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176 return rc; |
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177 } |
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178 |
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179 if (rc == NGX_AGAIN) { |
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180 if (out) { |
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181 break; |
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182 } |
430
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183 |
160
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184 return rc; |
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185 } |
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186 |
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187 /* delete the completed buf from the ctx->in chain */ |
160
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188 |
343
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189 if (ngx_buf_size(ctx->in->buf) == 0) { |
160
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190 ctx->in = ctx->in->next; |
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191 } |
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192 |
501 | 193 cl = ngx_alloc_chain_link(ctx->pool); |
194 if (cl == NULL) { | |
461 | 195 return NGX_ERROR; |
196 } | |
501 | 197 |
461 | 198 cl->buf = ctx->buf; |
199 cl->next = NULL; | |
160
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200 *last_out = cl; |
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201 last_out = &cl->next; |
343
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202 ctx->buf = NULL; |
160
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203 } |
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204 |
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205 if (out == NULL && last != NGX_NONE) { |
509 | 206 |
207 if (ctx->in) { | |
208 return NGX_AGAIN; | |
209 } | |
210 | |
160
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211 return last; |
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212 } |
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213 |
294
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214 last = ctx->output_filter(ctx->filter_ctx, out); |
160
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215 |
569 | 216 if (last == NGX_ERROR || last == NGX_DONE) { |
217 return last; | |
218 } | |
219 | |
4114
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220 ngx_chain_update_chains(ctx->pool, &ctx->free, &ctx->busy, &out, |
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221 ctx->tag); |
160
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222 last_out = &out; |
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223 } |
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224 } |
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225 |
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226 |
467 | 227 static ngx_inline ngx_int_t |
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228 ngx_output_chain_as_is(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf) |
160
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229 { |
469 | 230 ngx_uint_t sendfile; |
231 | |
343
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232 if (ngx_buf_special(buf)) { |
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233 return 1; |
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234 } |
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235 |
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236 #if (NGX_THREADS) |
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237 if (buf->in_file) { |
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238 buf->file->thread_handler = ctx->thread_handler; |
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239 buf->file->thread_ctx = ctx->filter_ctx; |
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240 } |
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241 #endif |
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242 |
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243 if (buf->in_file && buf->file->directio) { |
160
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244 return 0; |
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245 } |
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246 |
469 | 247 sendfile = ctx->sendfile; |
248 | |
249 #if (NGX_SENDFILE_LIMIT) | |
250 | |
251 if (buf->in_file && buf->file_pos >= NGX_SENDFILE_LIMIT) { | |
252 sendfile = 0; | |
253 } | |
254 | |
255 #endif | |
256 | |
257 if (!sendfile) { | |
455 | 258 |
343
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259 if (!ngx_buf_in_memory(buf)) { |
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260 return 0; |
170
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261 } |
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262 |
343
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263 buf->in_file = 0; |
160
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264 } |
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265 |
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266 #if (NGX_HAVE_AIO_SENDFILE) |
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267 if (ctx->aio_preload && buf->in_file) { |
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268 (void) ngx_output_chain_aio_setup(ctx, buf->file); |
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269 } |
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270 #endif |
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271 |
343
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272 if (ctx->need_in_memory && !ngx_buf_in_memory(buf)) { |
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273 return 0; |
160
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274 } |
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275 |
343
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276 if (ctx->need_in_temp && (buf->memory || buf->mmap)) { |
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277 return 0; |
160
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278 } |
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279 |
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280 return 1; |
160
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281 } |
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282 |
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283 |
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284 #if (NGX_HAVE_AIO_SENDFILE) |
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285 |
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286 static ngx_int_t |
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287 ngx_output_chain_aio_setup(ngx_output_chain_ctx_t *ctx, ngx_file_t *file) |
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288 { |
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289 ngx_event_aio_t *aio; |
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290 |
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291 if (file->aio == NULL && ngx_file_aio_init(file, ctx->pool) != NGX_OK) { |
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292 return NGX_ERROR; |
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293 } |
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294 |
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295 aio = file->aio; |
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296 |
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297 aio->data = ctx->filter_ctx; |
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298 aio->preload_handler = ctx->aio_preload; |
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299 |
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300 return NGX_OK; |
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301 } |
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302 |
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303 #endif |
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304 |
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305 |
499 | 306 static ngx_int_t |
307 ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, | |
308 ngx_chain_t *in) | |
469 | 309 { |
310 ngx_chain_t *cl, **ll; | |
311 #if (NGX_SENDFILE_LIMIT) | |
312 ngx_buf_t *b, *buf; | |
313 #endif | |
314 | |
315 ll = chain; | |
316 | |
317 for (cl = *chain; cl; cl = cl->next) { | |
318 ll = &cl->next; | |
319 } | |
320 | |
321 while (in) { | |
322 | |
501 | 323 cl = ngx_alloc_chain_link(pool); |
324 if (cl == NULL) { | |
469 | 325 return NGX_ERROR; |
326 } | |
327 | |
328 #if (NGX_SENDFILE_LIMIT) | |
329 | |
330 buf = in->buf; | |
331 | |
332 if (buf->in_file | |
333 && buf->file_pos < NGX_SENDFILE_LIMIT | |
334 && buf->file_last > NGX_SENDFILE_LIMIT) | |
335 { | |
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336 /* split a file buf on two bufs by the sendfile limit */ |
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337 |
501 | 338 b = ngx_calloc_buf(pool); |
339 if (b == NULL) { | |
469 | 340 return NGX_ERROR; |
341 } | |
342 | |
343 ngx_memcpy(b, buf, sizeof(ngx_buf_t)); | |
344 | |
345 if (ngx_buf_in_memory(buf)) { | |
346 buf->pos += (ssize_t) (NGX_SENDFILE_LIMIT - buf->file_pos); | |
347 b->last = buf->pos; | |
348 } | |
349 | |
350 buf->file_pos = NGX_SENDFILE_LIMIT; | |
351 b->file_last = NGX_SENDFILE_LIMIT; | |
352 | |
353 cl->buf = b; | |
354 | |
355 } else { | |
356 cl->buf = buf; | |
357 in = in->next; | |
358 } | |
359 | |
360 #else | |
361 cl->buf = in->buf; | |
362 in = in->next; | |
363 | |
364 #endif | |
365 | |
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366 cl->next = NULL; |
469 | 367 *ll = cl; |
368 ll = &cl->next; | |
369 } | |
370 | |
371 return NGX_OK; | |
372 } | |
373 | |
374 | |
499 | 375 static ngx_int_t |
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376 ngx_output_chain_align_file_buf(ngx_output_chain_ctx_t *ctx, off_t bsize) |
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377 { |
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378 size_t size; |
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379 ngx_buf_t *in; |
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380 |
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381 in = ctx->in->buf; |
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382 |
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383 if (in->file == NULL || !in->file->directio) { |
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384 return NGX_DECLINED; |
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385 } |
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386 |
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387 ctx->directio = 1; |
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388 |
3053 | 389 size = (size_t) (in->file_pos - (in->file_pos & ~(ctx->alignment - 1))); |
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390 |
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391 if (size == 0) { |
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392 |
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393 if (bsize >= (off_t) ctx->bufs.size) { |
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394 return NGX_DECLINED; |
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395 } |
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396 |
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397 size = (size_t) bsize; |
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398 |
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399 } else { |
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400 size = (size_t) ctx->alignment - size; |
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401 |
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402 if ((off_t) size > bsize) { |
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403 size = (size_t) bsize; |
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404 } |
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405 } |
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406 |
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407 ctx->buf = ngx_create_temp_buf(ctx->pool, size); |
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408 if (ctx->buf == NULL) { |
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409 return NGX_ERROR; |
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410 } |
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411 |
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412 /* |
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413 * we do not set ctx->buf->tag, because we do not want |
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414 * to reuse the buf via ctx->free list |
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415 */ |
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416 |
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417 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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418 ctx->unaligned = 1; |
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419 #endif |
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420 |
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421 return NGX_OK; |
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422 } |
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423 |
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424 |
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425 static ngx_int_t |
2230 | 426 ngx_output_chain_get_buf(ngx_output_chain_ctx_t *ctx, off_t bsize) |
427 { | |
428 size_t size; | |
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429 ngx_buf_t *b, *in; |
2230 | 430 ngx_uint_t recycled; |
431 | |
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432 in = ctx->in->buf; |
2230 | 433 size = ctx->bufs.size; |
434 recycled = 1; | |
435 | |
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436 if (in->last_in_chain) { |
2230 | 437 |
438 if (bsize < (off_t) size) { | |
439 | |
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440 /* |
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441 * allocate a small temp buf for a small last buf |
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442 * or its small last part |
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443 */ |
2230 | 444 |
445 size = (size_t) bsize; | |
446 recycled = 0; | |
447 | |
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448 } else if (!ctx->directio |
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449 && ctx->bufs.num == 1 |
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450 && (bsize < (off_t) (size + size / 4))) |
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451 { |
2230 | 452 /* |
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453 * allocate a temp buf that equals to a last buf, |
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454 * if there is no directio, the last buf size is lesser |
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455 * than 1.25 of bufs.size and the temp buf is single |
2230 | 456 */ |
457 | |
458 size = (size_t) bsize; | |
459 recycled = 0; | |
460 } | |
461 } | |
462 | |
463 b = ngx_calloc_buf(ctx->pool); | |
464 if (b == NULL) { | |
465 return NGX_ERROR; | |
466 } | |
467 | |
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468 if (ctx->directio) { |
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469 |
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470 /* |
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471 * allocate block aligned to a disk sector size to enable |
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472 * userland buffer direct usage conjunctly with directio |
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473 */ |
2230 | 474 |
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475 b->start = ngx_pmemalign(ctx->pool, size, (size_t) ctx->alignment); |
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476 if (b->start == NULL) { |
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477 return NGX_ERROR; |
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478 } |
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479 |
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480 } else { |
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481 b->start = ngx_palloc(ctx->pool, size); |
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482 if (b->start == NULL) { |
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483 return NGX_ERROR; |
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484 } |
2230 | 485 } |
486 | |
487 b->pos = b->start; | |
488 b->last = b->start; | |
489 b->end = b->last + size; | |
490 b->temporary = 1; | |
491 b->tag = ctx->tag; | |
492 b->recycled = recycled; | |
493 | |
494 ctx->buf = b; | |
495 ctx->allocated++; | |
496 | |
497 return NGX_OK; | |
498 } | |
499 | |
500 | |
501 static ngx_int_t | |
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502 ngx_output_chain_copy_buf(ngx_output_chain_ctx_t *ctx) |
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503 { |
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504 off_t size; |
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505 ssize_t n; |
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506 ngx_buf_t *src, *dst; |
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507 ngx_uint_t sendfile; |
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508 |
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509 src = ctx->in->buf; |
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510 dst = ctx->buf; |
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511 |
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512 size = ngx_buf_size(src); |
3515 | 513 size = ngx_min(size, dst->end - dst->pos); |
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514 |
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515 sendfile = ctx->sendfile & !ctx->directio; |
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516 |
469 | 517 #if (NGX_SENDFILE_LIMIT) |
518 | |
519 if (src->in_file && src->file_pos >= NGX_SENDFILE_LIMIT) { | |
520 sendfile = 0; | |
521 } | |
522 | |
523 #endif | |
524 | |
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525 if (ngx_buf_in_memory(src)) { |
473 | 526 ngx_memcpy(dst->pos, src->pos, (size_t) size); |
527 src->pos += (size_t) size; | |
528 dst->last += (size_t) size; | |
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529 |
455 | 530 if (src->in_file) { |
531 | |
532 if (sendfile) { | |
533 dst->in_file = 1; | |
534 dst->file = src->file; | |
535 dst->file_pos = src->file_pos; | |
536 dst->file_last = src->file_pos + size; | |
537 | |
538 } else { | |
539 dst->in_file = 0; | |
540 } | |
541 | |
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542 src->file_pos += size; |
452 | 543 |
544 } else { | |
545 dst->in_file = 0; | |
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546 } |
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547 |
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548 if (src->pos == src->last) { |
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549 dst->flush = src->flush; |
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550 dst->last_buf = src->last_buf; |
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551 dst->last_in_chain = src->last_in_chain; |
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552 } |
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553 |
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554 } else { |
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555 |
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556 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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557 |
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558 if (ctx->unaligned) { |
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559 if (ngx_directio_off(src->file->fd) == NGX_FILE_ERROR) { |
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560 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, ngx_errno, |
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561 ngx_directio_off_n " \"%s\" failed", |
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562 src->file->name.data); |
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563 } |
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564 } |
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565 |
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566 #endif |
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567 |
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568 #if (NGX_HAVE_FILE_AIO) |
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569 if (ctx->aio_handler) { |
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570 n = ngx_file_aio_read(src->file, dst->pos, (size_t) size, |
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571 src->file_pos, ctx->pool); |
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572 if (n == NGX_AGAIN) { |
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573 ctx->aio_handler(ctx, src->file); |
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574 return NGX_AGAIN; |
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575 } |
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576 |
6022
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577 } else |
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578 #endif |
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579 #if (NGX_THREADS) |
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580 if (src->file->thread_handler) { |
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581 n = ngx_thread_read(&ctx->thread_task, src->file, dst->pos, |
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582 (size_t) size, src->file_pos, ctx->pool); |
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583 if (n == NGX_AGAIN) { |
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584 ctx->aio = 1; |
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585 return NGX_AGAIN; |
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586 } |
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587 |
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588 } else |
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589 #endif |
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590 { |
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591 n = ngx_read_file(src->file, dst->pos, (size_t) size, |
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592 src->file_pos); |
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593 } |
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594 |
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595 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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596 |
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597 if (ctx->unaligned) { |
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598 ngx_err_t err; |
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599 |
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600 err = ngx_errno; |
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601 |
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602 if (ngx_directio_on(src->file->fd) == NGX_FILE_ERROR) { |
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603 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, ngx_errno, |
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604 ngx_directio_on_n " \"%s\" failed", |
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605 src->file->name.data); |
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606 } |
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607 |
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608 ngx_set_errno(err); |
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609 |
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610 ctx->unaligned = 0; |
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611 } |
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612 |
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613 #endif |
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614 |
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615 if (n == NGX_ERROR) { |
517 | 616 return (ngx_int_t) n; |
160
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617 } |
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|
618 |
473 | 619 if (n != size) { |
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620 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
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621 ngx_read_file_n " read only %z of %O from \"%s\"", |
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|
622 n, size, src->file->name.data); |
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623 return NGX_ERROR; |
160
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624 } |
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|
625 |
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626 dst->last += n; |
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|
627 |
452 | 628 if (sendfile) { |
629 dst->in_file = 1; | |
630 dst->file = src->file; | |
631 dst->file_pos = src->file_pos; | |
455 | 632 dst->file_last = src->file_pos + n; |
452 | 633 |
634 } else { | |
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635 dst->in_file = 0; |
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636 } |
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637 |
455 | 638 src->file_pos += n; |
639 | |
1238 | 640 if (src->file_pos == src->file_last) { |
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641 dst->flush = src->flush; |
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642 dst->last_buf = src->last_buf; |
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643 dst->last_in_chain = src->last_in_chain; |
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644 } |
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645 } |
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646 |
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647 return NGX_OK; |
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|
648 } |
162
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649 |
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650 |
499 | 651 ngx_int_t |
652 ngx_chain_writer(void *data, ngx_chain_t *in) | |
162
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653 { |
166
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nginx-0.0.1-2003-10-30-11:51:06 import
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diff
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|
654 ngx_chain_writer_ctx_t *ctx = data; |
162
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655 |
1962 | 656 off_t size; |
6046
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Output chain: free chain links in ngx_chain_writer().
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|
657 ngx_chain_t *cl, *ln, *chain; |
1962 | 658 ngx_connection_t *c; |
659 | |
660 c = ctx->connection; | |
162
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661 |
473 | 662 for (size = 0; in; in = in->next) { |
663 | |
664 #if 1 | |
665 if (ngx_buf_size(in->buf) == 0 && !ngx_buf_special(in->buf)) { | |
6045
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Output chain: zero size buf alerts in ngx_chain_writer().
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|
666 |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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667 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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|
668 "zero size buf in chain writer " |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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|
669 "t:%d r:%d f:%d %p %p-%p %p %O-%O", |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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|
670 in->buf->temporary, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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671 in->buf->recycled, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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672 in->buf->in_file, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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|
673 in->buf->start, |
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Output chain: zero size buf alerts in ngx_chain_writer().
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|
674 in->buf->pos, |
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Output chain: zero size buf alerts in ngx_chain_writer().
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675 in->buf->last, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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676 in->buf->file, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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|
677 in->buf->file_pos, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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|
678 in->buf->file_last); |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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changeset
|
679 |
473 | 680 ngx_debug_point(); |
6045
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Output chain: zero size buf alerts in ngx_chain_writer().
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681 |
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Output chain: zero size buf alerts in ngx_chain_writer().
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682 continue; |
473 | 683 } |
684 #endif | |
685 | |
686 size += ngx_buf_size(in->buf); | |
408
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nginx-0.0.10-2004-08-27-19:40:59 import
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403
diff
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|
687 |
1962 | 688 ngx_log_debug2(NGX_LOG_DEBUG_CORE, c->log, 0, |
1226 | 689 "chain writer buf fl:%d s:%uO", |
690 in->buf->flush, ngx_buf_size(in->buf)); | |
408
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nginx-0.0.10-2004-08-27-19:40:59 import
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parents:
403
diff
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|
691 |
501 | 692 cl = ngx_alloc_chain_link(ctx->pool); |
693 if (cl == NULL) { | |
461 | 694 return NGX_ERROR; |
695 } | |
501 | 696 |
461 | 697 cl->buf = in->buf; |
698 cl->next = NULL; | |
162
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699 *ctx->last = cl; |
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700 ctx->last = &cl->next; |
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701 } |
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702 |
1962 | 703 ngx_log_debug1(NGX_LOG_DEBUG_CORE, c->log, 0, |
461 | 704 "chain writer in: %p", ctx->out); |
291
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705 |
473 | 706 for (cl = ctx->out; cl; cl = cl->next) { |
707 | |
708 #if 1 | |
709 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
6045
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Output chain: zero size buf alerts in ngx_chain_writer().
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parents:
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|
710 |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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|
711 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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changeset
|
712 "zero size buf in chain writer " |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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parents:
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changeset
|
713 "t:%d r:%d f:%d %p %p-%p %p %O-%O", |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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|
714 cl->buf->temporary, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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715 cl->buf->recycled, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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716 cl->buf->in_file, |
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Output chain: zero size buf alerts in ngx_chain_writer().
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|
717 cl->buf->start, |
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Output chain: zero size buf alerts in ngx_chain_writer().
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|
718 cl->buf->pos, |
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Output chain: zero size buf alerts in ngx_chain_writer().
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719 cl->buf->last, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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720 cl->buf->file, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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721 cl->buf->file_pos, |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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722 cl->buf->file_last); |
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Output chain: zero size buf alerts in ngx_chain_writer().
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723 |
473 | 724 ngx_debug_point(); |
6045
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Output chain: zero size buf alerts in ngx_chain_writer().
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725 |
6ab301ddf469
Output chain: zero size buf alerts in ngx_chain_writer().
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726 continue; |
473 | 727 } |
728 #endif | |
729 | |
730 size += ngx_buf_size(cl->buf); | |
731 } | |
732 | |
1962 | 733 if (size == 0 && !c->buffered) { |
473 | 734 return NGX_OK; |
735 } | |
736 | |
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Output chain: free chain links in ngx_chain_writer().
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737 chain = c->send_chain(c, ctx->out, ctx->limit); |
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738 |
1962 | 739 ngx_log_debug1(NGX_LOG_DEBUG_CORE, c->log, 0, |
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Output chain: free chain links in ngx_chain_writer().
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740 "chain writer out: %p", chain); |
291
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741 |
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Output chain: free chain links in ngx_chain_writer().
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742 if (chain == NGX_CHAIN_ERROR) { |
162
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743 return NGX_ERROR; |
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744 } |
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745 |
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Output chain: free chain links in ngx_chain_writer().
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changeset
|
746 for (cl = ctx->out; cl && cl != chain; /* void */) { |
66176dfea01e
Output chain: free chain links in ngx_chain_writer().
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|
747 ln = cl; |
66176dfea01e
Output chain: free chain links in ngx_chain_writer().
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diff
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|
748 cl = cl->next; |
66176dfea01e
Output chain: free chain links in ngx_chain_writer().
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changeset
|
749 ngx_free_chain(ctx->pool, ln); |
66176dfea01e
Output chain: free chain links in ngx_chain_writer().
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diff
changeset
|
750 } |
66176dfea01e
Output chain: free chain links in ngx_chain_writer().
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
751 |
66176dfea01e
Output chain: free chain links in ngx_chain_writer().
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parents:
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diff
changeset
|
752 ctx->out = chain; |
66176dfea01e
Output chain: free chain links in ngx_chain_writer().
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changeset
|
753 |
162
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|
754 if (ctx->out == NULL) { |
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|
755 ctx->last = &ctx->out; |
1211 | 756 |
1962 | 757 if (!c->buffered) { |
1215
fb3ff245c96b
an request body might not be passed to backend,
Igor Sysoev <igor@sysoev.ru>
parents:
1211
diff
changeset
|
758 return NGX_OK; |
fb3ff245c96b
an request body might not be passed to backend,
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diff
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|
759 } |
162
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760 } |
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nginx-0.0.1-2003-10-28-00:01:00 import
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changeset
|
761 |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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|
762 return NGX_AGAIN; |
96993d4d5067
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763 } |