Mercurial > hg > nginx-quic
annotate src/core/ngx_output_chain.c @ 775:a452a0e13539
check nginx.pm version
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 12 Oct 2006 19:55:15 +0000 |
parents | 9262f520ce21 |
children | 597c83dad983 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
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10 |
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11 |
469 | 12 #if 0 |
13 #define NGX_SENDFILE_LIMIT 4096 | |
14 #endif | |
15 | |
16 | |
17 #define NGX_NONE 1 | |
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18 |
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19 |
467 | 20 static ngx_inline ngx_int_t |
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21 ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf); |
469 | 22 static ngx_int_t ngx_output_chain_add_copy(ngx_pool_t *pool, |
499 | 23 ngx_chain_t **chain, ngx_chain_t *in); |
343
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24 static ngx_int_t ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, |
499 | 25 ngx_uint_t sendfile); |
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26 |
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27 |
499 | 28 ngx_int_t |
29 ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in) | |
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30 { |
473 | 31 off_t bsize; |
32 size_t size; | |
597 | 33 ngx_int_t rc, last; |
34 ngx_uint_t recycled; | |
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35 ngx_chain_t *cl, *out, **last_out; |
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36 |
455 | 37 if (ctx->in == NULL && ctx->busy == NULL) { |
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38 |
469 | 39 /* |
40 * the short path for the case when the ctx->in and ctx->busy chains | |
41 * are empty, the incoming chain is empty too or has the single buf | |
42 * that does not require the copy | |
43 */ | |
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44 |
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45 if (in == NULL) { |
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46 return ctx->output_filter(ctx->filter_ctx, in); |
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47 } |
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48 |
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49 if (in->next == NULL |
469 | 50 #if (NGX_SENDFILE_LIMIT) |
51 && !(in->buf->in_file && in->buf->file_last > NGX_SENDFILE_LIMIT) | |
52 #endif | |
509 | 53 && !ngx_output_chain_need_to_copy(ctx, in->buf)) |
160
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54 { |
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55 return ctx->output_filter(ctx->filter_ctx, in); |
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56 } |
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57 } |
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58 |
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59 /* add the incoming buf to the chain ctx->in */ |
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60 |
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61 if (in) { |
469 | 62 if (ngx_output_chain_add_copy(ctx->pool, &ctx->in, in) == NGX_ERROR) { |
160
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63 return NGX_ERROR; |
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64 } |
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65 } |
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66 |
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67 out = NULL; |
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68 last_out = &out; |
499 | 69 last = NGX_NONE; |
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70 |
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71 for ( ;; ) { |
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72 |
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73 while (ctx->in) { |
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74 |
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75 /* |
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76 * cycle while there are the ctx->in bufs |
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77 * or there are the free output bufs to copy in |
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78 */ |
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79 |
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80 bsize = ngx_buf_size(ctx->in->buf); |
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81 |
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82 if (bsize == 0 && !ngx_buf_special(ctx->in->buf)) { |
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83 |
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84 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
483 | 85 "zero size buf in output " |
86 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
87 ctx->in->buf->temporary, | |
88 ctx->in->buf->recycled, | |
89 ctx->in->buf->in_file, | |
90 ctx->in->buf->start, | |
91 ctx->in->buf->pos, | |
92 ctx->in->buf->last, | |
93 ctx->in->buf->file, | |
94 ctx->in->buf->file_pos, | |
95 ctx->in->buf->file_last); | |
403
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96 |
473 | 97 ngx_debug_point(); |
98 | |
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99 ctx->in = ctx->in->next; |
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100 |
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101 continue; |
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102 } |
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103 |
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104 if (!ngx_output_chain_need_to_copy(ctx, ctx->in->buf)) { |
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105 |
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106 /* move the chain link to the output chain */ |
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107 |
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108 cl = ctx->in; |
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109 ctx->in = cl->next; |
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110 |
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111 *last_out = cl; |
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112 last_out = &cl->next; |
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113 cl->next = NULL; |
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114 |
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115 continue; |
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116 } |
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117 |
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118 if (ctx->buf == NULL) { |
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119 |
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120 /* get the free buf */ |
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121 |
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122 if (ctx->free) { |
507 | 123 cl = ctx->free; |
124 ctx->buf = cl->buf; | |
125 ctx->free = cl->next; | |
126 ngx_free_chain(ctx->pool, cl); | |
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127 |
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128 } else if (out || ctx->allocated == ctx->bufs.num) { |
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129 |
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130 break; |
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131 |
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132 } else { |
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133 |
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134 size = ctx->bufs.size; |
597 | 135 recycled = 1; |
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136 |
509 | 137 if (ctx->in->buf->last_in_chain) { |
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138 |
473 | 139 if (bsize < (off_t) ctx->bufs.size) { |
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140 |
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141 /* |
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142 * allocate small temp buf for the small last buf |
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143 * or its small last part |
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144 */ |
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145 |
473 | 146 size = (size_t) bsize; |
597 | 147 recycled = 0; |
160
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148 |
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149 } else if (ctx->bufs.num == 1 |
473 | 150 && (bsize < (off_t) (ctx->bufs.size |
151 + (ctx->bufs.size >> 2)))) | |
160
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152 { |
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153 /* |
343
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154 * allocate a temp buf that equals |
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155 * to the last buf if the last buf size is lesser |
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156 * than 1.25 of bufs.size and a temp buf is single |
160
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157 */ |
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158 |
473 | 159 size = (size_t) bsize; |
597 | 160 recycled = 0; |
160
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161 } |
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162 } |
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163 |
501 | 164 ctx->buf = ngx_create_temp_buf(ctx->pool, size); |
165 if (ctx->buf == NULL) { | |
343
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166 return NGX_ERROR; |
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167 } |
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168 |
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169 ctx->buf->tag = ctx->tag; |
597 | 170 ctx->buf->recycled = recycled; |
343
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171 ctx->allocated++; |
160
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172 } |
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173 } |
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174 |
343
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175 rc = ngx_output_chain_copy_buf(ctx->buf, ctx->in->buf, |
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176 ctx->sendfile); |
160
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177 |
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178 if (rc == NGX_ERROR) { |
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179 return rc; |
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180 } |
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181 |
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182 if (rc == NGX_AGAIN) { |
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183 if (out) { |
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184 break; |
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185 } |
430
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186 |
160
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187 return rc; |
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188 } |
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189 |
343
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190 /* delete the completed buf from the ctx->in chain */ |
160
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191 |
343
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192 if (ngx_buf_size(ctx->in->buf) == 0) { |
160
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193 ctx->in = ctx->in->next; |
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194 } |
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195 |
501 | 196 cl = ngx_alloc_chain_link(ctx->pool); |
197 if (cl == NULL) { | |
461 | 198 return NGX_ERROR; |
199 } | |
501 | 200 |
461 | 201 cl->buf = ctx->buf; |
202 cl->next = NULL; | |
160
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203 *last_out = cl; |
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204 last_out = &cl->next; |
343
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205 ctx->buf = NULL; |
160
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206 } |
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207 |
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208 if (out == NULL && last != NGX_NONE) { |
509 | 209 |
210 if (ctx->in) { | |
211 return NGX_AGAIN; | |
212 } | |
213 | |
160
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214 return last; |
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215 } |
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216 |
294
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217 last = ctx->output_filter(ctx->filter_ctx, out); |
160
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218 |
569 | 219 if (last == NGX_ERROR || last == NGX_DONE) { |
220 return last; | |
221 } | |
222 | |
160
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223 ngx_chain_update_chains(&ctx->free, &ctx->busy, &out, ctx->tag); |
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224 last_out = &out; |
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225 } |
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226 } |
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227 |
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228 |
467 | 229 static ngx_inline ngx_int_t |
499 | 230 ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf) |
160
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231 { |
469 | 232 ngx_uint_t sendfile; |
233 | |
343
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234 if (ngx_buf_special(buf)) { |
160
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235 return 0; |
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236 } |
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237 |
469 | 238 sendfile = ctx->sendfile; |
239 | |
240 #if (NGX_SENDFILE_LIMIT) | |
241 | |
242 if (buf->in_file && buf->file_pos >= NGX_SENDFILE_LIMIT) { | |
243 sendfile = 0; | |
244 } | |
245 | |
246 #endif | |
247 | |
248 if (!sendfile) { | |
455 | 249 |
343
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250 if (!ngx_buf_in_memory(buf)) { |
170
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251 return 1; |
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252 } |
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253 |
343
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254 buf->in_file = 0; |
160
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255 } |
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256 |
343
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257 if (ctx->need_in_memory && !ngx_buf_in_memory(buf)) { |
160
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258 return 1; |
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259 } |
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260 |
343
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261 if (ctx->need_in_temp && (buf->memory || buf->mmap)) { |
160
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262 return 1; |
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263 } |
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264 |
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265 return 0; |
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266 } |
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267 |
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268 |
499 | 269 static ngx_int_t |
270 ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, | |
271 ngx_chain_t *in) | |
469 | 272 { |
273 ngx_chain_t *cl, **ll; | |
274 #if (NGX_SENDFILE_LIMIT) | |
275 ngx_buf_t *b, *buf; | |
276 #endif | |
277 | |
278 ll = chain; | |
279 | |
280 for (cl = *chain; cl; cl = cl->next) { | |
281 ll = &cl->next; | |
282 } | |
283 | |
284 while (in) { | |
285 | |
501 | 286 cl = ngx_alloc_chain_link(pool); |
287 if (cl == NULL) { | |
469 | 288 return NGX_ERROR; |
289 } | |
290 | |
291 #if (NGX_SENDFILE_LIMIT) | |
292 | |
293 buf = in->buf; | |
294 | |
295 if (buf->in_file | |
296 && buf->file_pos < NGX_SENDFILE_LIMIT | |
297 && buf->file_last > NGX_SENDFILE_LIMIT) | |
298 { | |
501 | 299 b = ngx_calloc_buf(pool); |
300 if (b == NULL) { | |
469 | 301 return NGX_ERROR; |
302 } | |
303 | |
304 ngx_memcpy(b, buf, sizeof(ngx_buf_t)); | |
305 | |
306 if (ngx_buf_in_memory(buf)) { | |
307 buf->pos += (ssize_t) (NGX_SENDFILE_LIMIT - buf->file_pos); | |
308 b->last = buf->pos; | |
309 } | |
310 | |
311 buf->file_pos = NGX_SENDFILE_LIMIT; | |
312 b->file_last = NGX_SENDFILE_LIMIT; | |
313 | |
314 cl->buf = b; | |
315 | |
316 } else { | |
317 cl->buf = buf; | |
318 in = in->next; | |
319 } | |
320 | |
321 #else | |
322 cl->buf = in->buf; | |
323 in = in->next; | |
324 | |
325 #endif | |
326 | |
327 *ll = cl; | |
328 ll = &cl->next; | |
329 } | |
330 | |
331 *ll = NULL; | |
332 | |
333 return NGX_OK; | |
334 } | |
335 | |
336 | |
499 | 337 static ngx_int_t |
338 ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, ngx_uint_t sendfile) | |
160
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339 { |
473 | 340 off_t size; |
194
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170
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341 ssize_t n; |
160
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342 |
343
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343 size = ngx_buf_size(src); |
160
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344 |
473 | 345 if (size > dst->end - dst->pos) { |
160
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346 size = dst->end - dst->pos; |
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347 } |
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348 |
469 | 349 #if (NGX_SENDFILE_LIMIT) |
350 | |
351 if (src->in_file && src->file_pos >= NGX_SENDFILE_LIMIT) { | |
352 sendfile = 0; | |
353 } | |
354 | |
355 #endif | |
356 | |
343
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357 if (ngx_buf_in_memory(src)) { |
473 | 358 ngx_memcpy(dst->pos, src->pos, (size_t) size); |
359 src->pos += (size_t) size; | |
360 dst->last += (size_t) size; | |
160
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parents:
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361 |
455 | 362 if (src->in_file) { |
363 | |
364 if (sendfile) { | |
365 dst->in_file = 1; | |
366 dst->file = src->file; | |
367 dst->file_pos = src->file_pos; | |
368 dst->file_last = src->file_pos + size; | |
369 | |
370 } else { | |
371 dst->in_file = 0; | |
372 } | |
373 | |
160
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374 src->file_pos += size; |
452 | 375 |
376 } else { | |
377 dst->in_file = 0; | |
160
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parents:
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378 } |
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parents:
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379 |
343
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380 if (src->last_buf && src->pos == src->last) { |
6bdf858bff8c
nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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parents:
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diff
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381 dst->last_buf = 1; |
160
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parents:
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382 } |
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nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
diff
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|
383 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
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384 } else { |
473 | 385 n = ngx_read_file(src->file, dst->pos, (size_t) size, src->file_pos); |
160
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parents:
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386 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
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387 if (n == NGX_ERROR) { |
517 | 388 return (ngx_int_t) n; |
160
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Igor Sysoev <igor@sysoev.ru>
parents:
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389 } |
e7e094d34162
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parents:
diff
changeset
|
390 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
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391 #if (NGX_FILE_AIO_READ) |
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parents:
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392 if (n == NGX_AGAIN) { |
517 | 393 return (ngx_int_t) n; |
160
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parents:
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394 } |
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nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
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395 #endif |
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parents:
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396 |
473 | 397 if (n != size) { |
160
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parents:
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398 ngx_log_error(NGX_LOG_ALERT, src->file->log, 0, |
473 | 399 ngx_read_file_n " reads only %z of %O from file", |
160
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Igor Sysoev <igor@sysoev.ru>
parents:
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|
400 n, size); |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
401 if (n == 0) { |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
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402 return NGX_ERROR; |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
403 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
404 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
405 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
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|
406 dst->last += n; |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
407 |
452 | 408 if (sendfile) { |
409 dst->in_file = 1; | |
410 dst->file = src->file; | |
411 dst->file_pos = src->file_pos; | |
455 | 412 dst->file_last = src->file_pos + n; |
452 | 413 |
414 } else { | |
343
6bdf858bff8c
nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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parents:
334
diff
changeset
|
415 dst->in_file = 0; |
160
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nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
416 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
417 |
455 | 418 src->file_pos += n; |
419 | |
343
6bdf858bff8c
nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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parents:
334
diff
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|
420 if (src->last_buf && src->file_pos == src->file_last) { |
6bdf858bff8c
nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents:
334
diff
changeset
|
421 dst->last_buf = 1; |
160
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
422 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
423 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
424 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
425 return NGX_OK; |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
426 } |
162
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
427 |
96993d4d5067
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160
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|
428 |
499 | 429 ngx_int_t |
430 ngx_chain_writer(void *data, ngx_chain_t *in) | |
162
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parents:
160
diff
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|
431 { |
166
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
164
diff
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|
432 ngx_chain_writer_ctx_t *ctx = data; |
162
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parents:
160
diff
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|
433 |
473 | 434 off_t size; |
162
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parents:
160
diff
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|
435 ngx_chain_t *cl; |
96993d4d5067
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parents:
160
diff
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436 |
473 | 437 for (size = 0; in; in = in->next) { |
438 | |
439 #if 1 | |
440 if (ngx_buf_size(in->buf) == 0 && !ngx_buf_special(in->buf)) { | |
441 ngx_debug_point(); | |
442 } | |
443 #endif | |
444 | |
445 size += ngx_buf_size(in->buf); | |
408
d6e2b445c1b8
nginx-0.0.10-2004-08-27-19:40:59 import
Igor Sysoev <igor@sysoev.ru>
parents:
403
diff
changeset
|
446 |
d6e2b445c1b8
nginx-0.0.10-2004-08-27-19:40:59 import
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parents:
403
diff
changeset
|
447 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, |
461 | 448 "chain writer buf size: %uz", ngx_buf_size(in->buf)); |
408
d6e2b445c1b8
nginx-0.0.10-2004-08-27-19:40:59 import
Igor Sysoev <igor@sysoev.ru>
parents:
403
diff
changeset
|
449 |
501 | 450 cl = ngx_alloc_chain_link(ctx->pool); |
451 if (cl == NULL) { | |
461 | 452 return NGX_ERROR; |
453 } | |
501 | 454 |
461 | 455 cl->buf = in->buf; |
456 cl->next = NULL; | |
162
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parents:
160
diff
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|
457 *ctx->last = cl; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
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|
458 ctx->last = &cl->next; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
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|
459 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
460 |
291
117ccc7c4055
nginx-0.0.3-2004-03-16-16:35:20 import
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parents:
257
diff
changeset
|
461 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, |
461 | 462 "chain writer in: %p", ctx->out); |
291
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parents:
257
diff
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|
463 |
473 | 464 for (cl = ctx->out; cl; cl = cl->next) { |
465 | |
466 #if 1 | |
467 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
468 ngx_debug_point(); | |
469 } | |
470 | |
471 #endif | |
472 | |
473 size += ngx_buf_size(cl->buf); | |
474 } | |
475 | |
476 if (size == 0) { | |
477 return NGX_OK; | |
478 } | |
479 | |
577 | 480 ctx->out = ctx->connection->send_chain(ctx->connection, ctx->out, |
481 ctx->limit); | |
162
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parents:
160
diff
changeset
|
482 |
291
117ccc7c4055
nginx-0.0.3-2004-03-16-16:35:20 import
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parents:
257
diff
changeset
|
483 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, |
461 | 484 "chain writer out: %p", ctx->out); |
291
117ccc7c4055
nginx-0.0.3-2004-03-16-16:35:20 import
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parents:
257
diff
changeset
|
485 |
162
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
486 if (ctx->out == NGX_CHAIN_ERROR) { |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
487 return NGX_ERROR; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
488 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
489 |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
490 if (ctx->out == NULL) { |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
491 ctx->last = &ctx->out; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
492 return NGX_OK; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
493 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
494 |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
495 return NGX_AGAIN; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
496 } |