Mercurial > hg > nginx-quic
annotate src/core/ngx_output_chain.c @ 588:0a2c30f516e6
release-0.3.15 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 07 Dec 2005 14:51:31 +0000 |
parents | 4d9ea73a627a |
children | 9262f520ce21 |
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 { |
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31 int rc, last; |
473 | 32 off_t bsize; |
33 size_t size; | |
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34 ngx_chain_t *cl, *out, **last_out; |
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35 |
455 | 36 if (ctx->in == NULL && ctx->busy == NULL) { |
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37 |
469 | 38 /* |
39 * the short path for the case when the ctx->in and ctx->busy chains | |
40 * are empty, the incoming chain is empty too or has the single buf | |
41 * that does not require the copy | |
42 */ | |
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43 |
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44 if (in == NULL) { |
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45 return ctx->output_filter(ctx->filter_ctx, in); |
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46 } |
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47 |
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48 if (in->next == NULL |
469 | 49 #if (NGX_SENDFILE_LIMIT) |
50 && !(in->buf->in_file && in->buf->file_last > NGX_SENDFILE_LIMIT) | |
51 #endif | |
509 | 52 && !ngx_output_chain_need_to_copy(ctx, in->buf)) |
160
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53 { |
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54 return ctx->output_filter(ctx->filter_ctx, in); |
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55 } |
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56 } |
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57 |
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58 /* add the incoming buf to the chain ctx->in */ |
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59 |
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60 if (in) { |
469 | 61 if (ngx_output_chain_add_copy(ctx->pool, &ctx->in, in) == NGX_ERROR) { |
160
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62 return NGX_ERROR; |
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63 } |
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64 } |
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65 |
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66 out = NULL; |
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67 last_out = &out; |
499 | 68 last = NGX_NONE; |
160
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69 |
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70 for ( ;; ) { |
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71 |
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72 while (ctx->in) { |
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73 |
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74 /* |
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75 * cycle while there are the ctx->in bufs |
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76 * or there are the free output bufs to copy in |
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77 */ |
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78 |
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79 bsize = ngx_buf_size(ctx->in->buf); |
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80 |
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81 if (bsize == 0 && !ngx_buf_special(ctx->in->buf)) { |
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82 |
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83 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
483 | 84 "zero size buf in output " |
85 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
86 ctx->in->buf->temporary, | |
87 ctx->in->buf->recycled, | |
88 ctx->in->buf->in_file, | |
89 ctx->in->buf->start, | |
90 ctx->in->buf->pos, | |
91 ctx->in->buf->last, | |
92 ctx->in->buf->file, | |
93 ctx->in->buf->file_pos, | |
94 ctx->in->buf->file_last); | |
403
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95 |
473 | 96 ngx_debug_point(); |
97 | |
403
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98 ctx->in = ctx->in->next; |
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99 |
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100 continue; |
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101 } |
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102 |
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103 if (!ngx_output_chain_need_to_copy(ctx, ctx->in->buf)) { |
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104 |
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105 /* move the chain link to the output chain */ |
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106 |
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107 cl = ctx->in; |
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108 ctx->in = cl->next; |
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109 |
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110 *last_out = cl; |
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111 last_out = &cl->next; |
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112 cl->next = NULL; |
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113 |
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114 continue; |
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115 } |
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116 |
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117 if (ctx->buf == NULL) { |
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118 |
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119 /* get the free buf */ |
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120 |
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121 if (ctx->free) { |
507 | 122 cl = ctx->free; |
123 ctx->buf = cl->buf; | |
124 ctx->free = cl->next; | |
125 ngx_free_chain(ctx->pool, cl); | |
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126 |
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127 } else if (out || ctx->allocated == ctx->bufs.num) { |
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128 |
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129 break; |
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130 |
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131 } else { |
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132 |
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133 size = ctx->bufs.size; |
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134 |
509 | 135 if (ctx->in->buf->last_in_chain) { |
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136 |
473 | 137 if (bsize < (off_t) ctx->bufs.size) { |
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138 |
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139 /* |
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140 * allocate small temp buf for the small last buf |
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141 * or its small last part |
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142 */ |
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143 |
473 | 144 size = (size_t) bsize; |
160
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145 |
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146 } else if (ctx->bufs.num == 1 |
473 | 147 && (bsize < (off_t) (ctx->bufs.size |
148 + (ctx->bufs.size >> 2)))) | |
160
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149 { |
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150 /* |
343
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151 * allocate a temp buf that equals |
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152 * to the last buf if the last buf size is lesser |
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153 * than 1.25 of bufs.size and a temp buf is single |
160
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154 */ |
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155 |
473 | 156 size = (size_t) bsize; |
160
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157 } |
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158 } |
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159 |
501 | 160 ctx->buf = ngx_create_temp_buf(ctx->pool, size); |
161 if (ctx->buf == NULL) { | |
343
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162 return NGX_ERROR; |
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163 } |
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164 |
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165 ctx->buf->tag = ctx->tag; |
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166 ctx->buf->recycled = 1; |
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167 ctx->allocated++; |
160
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168 } |
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169 } |
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170 |
343
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171 rc = ngx_output_chain_copy_buf(ctx->buf, ctx->in->buf, |
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172 ctx->sendfile); |
160
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173 |
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174 if (rc == NGX_ERROR) { |
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175 return rc; |
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176 } |
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177 |
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178 if (rc == NGX_AGAIN) { |
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179 if (out) { |
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180 break; |
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181 } |
430
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182 |
160
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183 return rc; |
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184 } |
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185 |
343
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186 /* delete the completed buf from the ctx->in chain */ |
160
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187 |
343
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188 if (ngx_buf_size(ctx->in->buf) == 0) { |
160
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189 ctx->in = ctx->in->next; |
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190 } |
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191 |
501 | 192 cl = ngx_alloc_chain_link(ctx->pool); |
193 if (cl == NULL) { | |
461 | 194 return NGX_ERROR; |
195 } | |
501 | 196 |
461 | 197 cl->buf = ctx->buf; |
198 cl->next = NULL; | |
160
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199 *last_out = cl; |
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200 last_out = &cl->next; |
343
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201 ctx->buf = NULL; |
160
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202 } |
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203 |
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204 if (out == NULL && last != NGX_NONE) { |
509 | 205 |
206 if (ctx->in) { | |
207 return NGX_AGAIN; | |
208 } | |
209 | |
160
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210 return last; |
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211 } |
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212 |
294
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213 last = ctx->output_filter(ctx->filter_ctx, out); |
160
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214 |
569 | 215 if (last == NGX_ERROR || last == NGX_DONE) { |
216 return last; | |
217 } | |
218 | |
160
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219 ngx_chain_update_chains(&ctx->free, &ctx->busy, &out, ctx->tag); |
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220 last_out = &out; |
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221 } |
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222 } |
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223 |
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224 |
467 | 225 static ngx_inline ngx_int_t |
499 | 226 ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf) |
160
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227 { |
469 | 228 ngx_uint_t sendfile; |
229 | |
343
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230 if (ngx_buf_special(buf)) { |
160
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231 return 0; |
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232 } |
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233 |
469 | 234 sendfile = ctx->sendfile; |
235 | |
236 #if (NGX_SENDFILE_LIMIT) | |
237 | |
238 if (buf->in_file && buf->file_pos >= NGX_SENDFILE_LIMIT) { | |
239 sendfile = 0; | |
240 } | |
241 | |
242 #endif | |
243 | |
244 if (!sendfile) { | |
455 | 245 |
343
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246 if (!ngx_buf_in_memory(buf)) { |
170
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247 return 1; |
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248 } |
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249 |
343
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250 buf->in_file = 0; |
160
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251 } |
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252 |
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253 if (ctx->need_in_memory && !ngx_buf_in_memory(buf)) { |
160
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254 return 1; |
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255 } |
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256 |
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257 if (ctx->need_in_temp && (buf->memory || buf->mmap)) { |
160
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258 return 1; |
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259 } |
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260 |
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261 return 0; |
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262 } |
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263 |
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264 |
499 | 265 static ngx_int_t |
266 ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, | |
267 ngx_chain_t *in) | |
469 | 268 { |
269 ngx_chain_t *cl, **ll; | |
270 #if (NGX_SENDFILE_LIMIT) | |
271 ngx_buf_t *b, *buf; | |
272 #endif | |
273 | |
274 ll = chain; | |
275 | |
276 for (cl = *chain; cl; cl = cl->next) { | |
277 ll = &cl->next; | |
278 } | |
279 | |
280 while (in) { | |
281 | |
501 | 282 cl = ngx_alloc_chain_link(pool); |
283 if (cl == NULL) { | |
469 | 284 return NGX_ERROR; |
285 } | |
286 | |
287 #if (NGX_SENDFILE_LIMIT) | |
288 | |
289 buf = in->buf; | |
290 | |
291 if (buf->in_file | |
292 && buf->file_pos < NGX_SENDFILE_LIMIT | |
293 && buf->file_last > NGX_SENDFILE_LIMIT) | |
294 { | |
501 | 295 b = ngx_calloc_buf(pool); |
296 if (b == NULL) { | |
469 | 297 return NGX_ERROR; |
298 } | |
299 | |
300 ngx_memcpy(b, buf, sizeof(ngx_buf_t)); | |
301 | |
302 if (ngx_buf_in_memory(buf)) { | |
303 buf->pos += (ssize_t) (NGX_SENDFILE_LIMIT - buf->file_pos); | |
304 b->last = buf->pos; | |
305 } | |
306 | |
307 buf->file_pos = NGX_SENDFILE_LIMIT; | |
308 b->file_last = NGX_SENDFILE_LIMIT; | |
309 | |
310 cl->buf = b; | |
311 | |
312 } else { | |
313 cl->buf = buf; | |
314 in = in->next; | |
315 } | |
316 | |
317 #else | |
318 cl->buf = in->buf; | |
319 in = in->next; | |
320 | |
321 #endif | |
322 | |
323 *ll = cl; | |
324 ll = &cl->next; | |
325 } | |
326 | |
327 *ll = NULL; | |
328 | |
329 return NGX_OK; | |
330 } | |
331 | |
332 | |
499 | 333 static ngx_int_t |
334 ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, ngx_uint_t sendfile) | |
160
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335 { |
473 | 336 off_t size; |
194
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337 ssize_t n; |
160
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338 |
343
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339 size = ngx_buf_size(src); |
160
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340 |
473 | 341 if (size > dst->end - dst->pos) { |
160
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342 size = dst->end - dst->pos; |
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343 } |
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parents:
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344 |
469 | 345 #if (NGX_SENDFILE_LIMIT) |
346 | |
347 if (src->in_file && src->file_pos >= NGX_SENDFILE_LIMIT) { | |
348 sendfile = 0; | |
349 } | |
350 | |
351 #endif | |
352 | |
343
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353 if (ngx_buf_in_memory(src)) { |
473 | 354 ngx_memcpy(dst->pos, src->pos, (size_t) size); |
355 src->pos += (size_t) size; | |
356 dst->last += (size_t) size; | |
160
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357 |
455 | 358 if (src->in_file) { |
359 | |
360 if (sendfile) { | |
361 dst->in_file = 1; | |
362 dst->file = src->file; | |
363 dst->file_pos = src->file_pos; | |
364 dst->file_last = src->file_pos + size; | |
365 | |
366 } else { | |
367 dst->in_file = 0; | |
368 } | |
369 | |
160
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370 src->file_pos += size; |
452 | 371 |
372 } else { | |
373 dst->in_file = 0; | |
160
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374 } |
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parents:
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375 |
343
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376 if (src->last_buf && src->pos == src->last) { |
6bdf858bff8c
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parents:
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377 dst->last_buf = 1; |
160
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parents:
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378 } |
e7e094d34162
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parents:
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379 |
e7e094d34162
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parents:
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380 } else { |
473 | 381 n = ngx_read_file(src->file, dst->pos, (size_t) size, src->file_pos); |
160
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parents:
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382 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
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383 if (n == NGX_ERROR) { |
517 | 384 return (ngx_int_t) n; |
160
e7e094d34162
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parents:
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385 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
386 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
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387 #if (NGX_FILE_AIO_READ) |
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parents:
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388 if (n == NGX_AGAIN) { |
517 | 389 return (ngx_int_t) n; |
160
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parents:
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390 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
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391 #endif |
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parents:
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392 |
473 | 393 if (n != size) { |
160
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parents:
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394 ngx_log_error(NGX_LOG_ALERT, src->file->log, 0, |
473 | 395 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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|
396 n, size); |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
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|
397 if (n == 0) { |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
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398 return NGX_ERROR; |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
399 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
400 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
401 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
402 dst->last += n; |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
403 |
452 | 404 if (sendfile) { |
405 dst->in_file = 1; | |
406 dst->file = src->file; | |
407 dst->file_pos = src->file_pos; | |
455 | 408 dst->file_last = src->file_pos + n; |
452 | 409 |
410 } else { | |
343
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
|
411 dst->in_file = 0; |
160
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
412 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
413 |
455 | 414 src->file_pos += n; |
415 | |
343
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
|
416 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
|
417 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
|
418 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
419 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
420 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
421 return NGX_OK; |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
422 } |
162
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
423 |
96993d4d5067
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parents:
160
diff
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|
424 |
499 | 425 ngx_int_t |
426 ngx_chain_writer(void *data, ngx_chain_t *in) | |
162
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Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
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|
427 { |
166
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
164
diff
changeset
|
428 ngx_chain_writer_ctx_t *ctx = data; |
162
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parents:
160
diff
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|
429 |
473 | 430 off_t size; |
162
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parents:
160
diff
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|
431 ngx_chain_t *cl; |
96993d4d5067
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parents:
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diff
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432 |
473 | 433 for (size = 0; in; in = in->next) { |
434 | |
435 #if 1 | |
436 if (ngx_buf_size(in->buf) == 0 && !ngx_buf_special(in->buf)) { | |
437 ngx_debug_point(); | |
438 } | |
439 #endif | |
440 | |
441 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
|
442 |
d6e2b445c1b8
nginx-0.0.10-2004-08-27-19:40:59 import
Igor Sysoev <igor@sysoev.ru>
parents:
403
diff
changeset
|
443 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, |
461 | 444 "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
|
445 |
501 | 446 cl = ngx_alloc_chain_link(ctx->pool); |
447 if (cl == NULL) { | |
461 | 448 return NGX_ERROR; |
449 } | |
501 | 450 |
461 | 451 cl->buf = in->buf; |
452 cl->next = NULL; | |
162
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parents:
160
diff
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|
453 *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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|
454 ctx->last = &cl->next; |
96993d4d5067
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parents:
160
diff
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|
455 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
456 |
291
117ccc7c4055
nginx-0.0.3-2004-03-16-16:35:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
257
diff
changeset
|
457 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, |
461 | 458 "chain writer in: %p", ctx->out); |
291
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parents:
257
diff
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|
459 |
473 | 460 for (cl = ctx->out; cl; cl = cl->next) { |
461 | |
462 #if 1 | |
463 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
464 ngx_debug_point(); | |
465 } | |
466 | |
467 #endif | |
468 | |
469 size += ngx_buf_size(cl->buf); | |
470 } | |
471 | |
472 if (size == 0) { | |
473 return NGX_OK; | |
474 } | |
475 | |
577 | 476 ctx->out = ctx->connection->send_chain(ctx->connection, ctx->out, |
477 ctx->limit); | |
162
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parents:
160
diff
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|
478 |
291
117ccc7c4055
nginx-0.0.3-2004-03-16-16:35:20 import
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parents:
257
diff
changeset
|
479 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, |
461 | 480 "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
|
481 |
162
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
482 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
|
483 return NGX_ERROR; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
484 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
485 |
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 == NULL) { |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
487 ctx->last = &ctx->out; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
488 return NGX_OK; |
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
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
490 |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
491 return NGX_AGAIN; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
492 } |