Mercurial > hg > nginx
annotate src/core/ngx_output_chain.c @ 3053:0d253659da12
directio_alignment
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 28 Aug 2009 08:15:55 +0000 |
parents | 6060225e9261 |
children | 5ea5a90000d5 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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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 | |
2316 | 16 /* |
17 * When DIRECTIO is enabled FreeBSD, Solaris, and MacOSX read directly | |
18 * to an application memory from a device if parameters are aligned | |
3053 | 19 * to device sector boundary (512 bytes). They fallback to usual read |
2316 | 20 * operation if the parameters are not aligned. |
21 * Linux allows DIRECTIO only if the parameters are aligned to a filesystem | |
22 * sector boundary, otherwise it returns EINVAL. The sector size is | |
23 * usually 512 bytes, however, on XFS it may be 4096 bytes. | |
24 */ | |
469 | 25 |
26 #define NGX_NONE 1 | |
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27 |
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28 |
467 | 29 static ngx_inline ngx_int_t |
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30 ngx_output_chain_as_is(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf); |
469 | 31 static ngx_int_t ngx_output_chain_add_copy(ngx_pool_t *pool, |
499 | 32 ngx_chain_t **chain, ngx_chain_t *in); |
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33 static ngx_int_t ngx_output_chain_align_file_buf(ngx_output_chain_ctx_t *ctx, |
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34 off_t bsize); |
2230 | 35 static ngx_int_t ngx_output_chain_get_buf(ngx_output_chain_ctx_t *ctx, |
36 off_t bsize); | |
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37 static ngx_int_t ngx_output_chain_copy_buf(ngx_output_chain_ctx_t *ctx); |
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38 |
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39 |
499 | 40 ngx_int_t |
41 ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in) | |
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42 { |
473 | 43 off_t bsize; |
597 | 44 ngx_int_t rc, last; |
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45 ngx_chain_t *cl, *out, **last_out; |
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46 |
455 | 47 if (ctx->in == NULL && ctx->busy == NULL) { |
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48 |
469 | 49 /* |
50 * the short path for the case when the ctx->in and ctx->busy chains | |
51 * are empty, the incoming chain is empty too or has the single buf | |
52 * that does not require the copy | |
53 */ | |
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54 |
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55 if (in == NULL) { |
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56 return ctx->output_filter(ctx->filter_ctx, in); |
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57 } |
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58 |
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59 if (in->next == NULL |
469 | 60 #if (NGX_SENDFILE_LIMIT) |
61 && !(in->buf->in_file && in->buf->file_last > NGX_SENDFILE_LIMIT) | |
62 #endif | |
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63 && ngx_output_chain_as_is(ctx, in->buf)) |
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64 { |
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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 |
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69 /* add the incoming buf to the chain ctx->in */ |
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70 |
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71 if (in) { |
469 | 72 if (ngx_output_chain_add_copy(ctx->pool, &ctx->in, in) == NGX_ERROR) { |
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73 return NGX_ERROR; |
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74 } |
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75 } |
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76 |
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77 out = NULL; |
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78 last_out = &out; |
499 | 79 last = NGX_NONE; |
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80 |
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81 for ( ;; ) { |
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82 |
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83 while (ctx->in) { |
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84 |
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85 /* |
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86 * cycle while there are the ctx->in bufs |
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87 * and there are the free output bufs to copy in |
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88 */ |
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89 |
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90 bsize = ngx_buf_size(ctx->in->buf); |
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91 |
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92 if (bsize == 0 && !ngx_buf_special(ctx->in->buf)) { |
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93 |
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94 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
483 | 95 "zero size buf in output " |
96 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
97 ctx->in->buf->temporary, | |
98 ctx->in->buf->recycled, | |
99 ctx->in->buf->in_file, | |
100 ctx->in->buf->start, | |
101 ctx->in->buf->pos, | |
102 ctx->in->buf->last, | |
103 ctx->in->buf->file, | |
104 ctx->in->buf->file_pos, | |
105 ctx->in->buf->file_last); | |
403
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106 |
473 | 107 ngx_debug_point(); |
108 | |
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109 ctx->in = ctx->in->next; |
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110 |
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111 continue; |
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112 } |
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113 |
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114 if (ngx_output_chain_as_is(ctx, ctx->in->buf)) { |
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115 |
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116 /* move the chain link to the output chain */ |
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117 |
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118 cl = ctx->in; |
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119 ctx->in = cl->next; |
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120 |
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121 *last_out = cl; |
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122 last_out = &cl->next; |
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123 cl->next = NULL; |
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124 |
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125 continue; |
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126 } |
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127 |
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128 if (ctx->buf == NULL) { |
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129 |
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130 rc = ngx_output_chain_align_file_buf(ctx, bsize); |
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131 |
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132 if (rc == NGX_ERROR) { |
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133 return NGX_ERROR; |
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134 } |
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135 |
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136 if (rc != NGX_OK) { |
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137 |
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138 if (ctx->free) { |
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139 |
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140 /* get the free buf */ |
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141 |
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142 cl = ctx->free; |
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143 ctx->buf = cl->buf; |
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144 ctx->free = cl->next; |
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145 |
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146 ngx_free_chain(ctx->pool, cl); |
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147 |
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148 } else if (out || ctx->allocated == ctx->bufs.num) { |
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149 |
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150 break; |
334
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151 |
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152 } else if (ngx_output_chain_get_buf(ctx, bsize) != NGX_OK) { |
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153 return NGX_ERROR; |
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154 } |
160
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155 } |
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156 } |
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157 |
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158 rc = ngx_output_chain_copy_buf(ctx); |
160
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159 |
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160 if (rc == NGX_ERROR) { |
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161 return rc; |
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162 } |
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163 |
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164 if (rc == NGX_AGAIN) { |
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165 if (out) { |
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166 break; |
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167 } |
430
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168 |
160
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169 return rc; |
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170 } |
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171 |
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172 /* delete the completed buf from the ctx->in chain */ |
160
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173 |
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174 if (ngx_buf_size(ctx->in->buf) == 0) { |
160
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175 ctx->in = ctx->in->next; |
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176 } |
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177 |
501 | 178 cl = ngx_alloc_chain_link(ctx->pool); |
179 if (cl == NULL) { | |
461 | 180 return NGX_ERROR; |
181 } | |
501 | 182 |
461 | 183 cl->buf = ctx->buf; |
184 cl->next = NULL; | |
160
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185 *last_out = cl; |
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186 last_out = &cl->next; |
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187 ctx->buf = NULL; |
160
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188 } |
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189 |
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190 if (out == NULL && last != NGX_NONE) { |
509 | 191 |
192 if (ctx->in) { | |
193 return NGX_AGAIN; | |
194 } | |
195 | |
160
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196 return last; |
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197 } |
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198 |
294
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199 last = ctx->output_filter(ctx->filter_ctx, out); |
160
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200 |
569 | 201 if (last == NGX_ERROR || last == NGX_DONE) { |
202 return last; | |
203 } | |
204 | |
160
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205 ngx_chain_update_chains(&ctx->free, &ctx->busy, &out, ctx->tag); |
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206 last_out = &out; |
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207 } |
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208 } |
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209 |
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210 |
467 | 211 static ngx_inline ngx_int_t |
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212 ngx_output_chain_as_is(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf) |
160
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213 { |
469 | 214 ngx_uint_t sendfile; |
215 | |
343
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216 if (ngx_buf_special(buf)) { |
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217 return 1; |
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218 } |
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219 |
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220 if (buf->in_file && buf->file->directio) { |
160
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221 return 0; |
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222 } |
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223 |
469 | 224 sendfile = ctx->sendfile; |
225 | |
226 #if (NGX_SENDFILE_LIMIT) | |
227 | |
228 if (buf->in_file && buf->file_pos >= NGX_SENDFILE_LIMIT) { | |
229 sendfile = 0; | |
230 } | |
231 | |
232 #endif | |
233 | |
234 if (!sendfile) { | |
455 | 235 |
343
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236 if (!ngx_buf_in_memory(buf)) { |
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237 return 0; |
170
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238 } |
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239 |
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240 buf->in_file = 0; |
160
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241 } |
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242 |
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243 if (ctx->need_in_memory && !ngx_buf_in_memory(buf)) { |
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244 return 0; |
160
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245 } |
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246 |
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247 if (ctx->need_in_temp && (buf->memory || buf->mmap)) { |
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248 return 0; |
160
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249 } |
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250 |
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251 return 1; |
160
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252 } |
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253 |
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254 |
499 | 255 static ngx_int_t |
256 ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, | |
257 ngx_chain_t *in) | |
469 | 258 { |
259 ngx_chain_t *cl, **ll; | |
260 #if (NGX_SENDFILE_LIMIT) | |
261 ngx_buf_t *b, *buf; | |
262 #endif | |
263 | |
264 ll = chain; | |
265 | |
266 for (cl = *chain; cl; cl = cl->next) { | |
267 ll = &cl->next; | |
268 } | |
269 | |
270 while (in) { | |
271 | |
501 | 272 cl = ngx_alloc_chain_link(pool); |
273 if (cl == NULL) { | |
469 | 274 return NGX_ERROR; |
275 } | |
276 | |
277 #if (NGX_SENDFILE_LIMIT) | |
278 | |
279 buf = in->buf; | |
280 | |
281 if (buf->in_file | |
282 && buf->file_pos < NGX_SENDFILE_LIMIT | |
283 && buf->file_last > NGX_SENDFILE_LIMIT) | |
284 { | |
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285 /* split a file buf on two bufs by the sendfile limit */ |
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286 |
501 | 287 b = ngx_calloc_buf(pool); |
288 if (b == NULL) { | |
469 | 289 return NGX_ERROR; |
290 } | |
291 | |
292 ngx_memcpy(b, buf, sizeof(ngx_buf_t)); | |
293 | |
294 if (ngx_buf_in_memory(buf)) { | |
295 buf->pos += (ssize_t) (NGX_SENDFILE_LIMIT - buf->file_pos); | |
296 b->last = buf->pos; | |
297 } | |
298 | |
299 buf->file_pos = NGX_SENDFILE_LIMIT; | |
300 b->file_last = NGX_SENDFILE_LIMIT; | |
301 | |
302 cl->buf = b; | |
303 | |
304 } else { | |
305 cl->buf = buf; | |
306 in = in->next; | |
307 } | |
308 | |
309 #else | |
310 cl->buf = in->buf; | |
311 in = in->next; | |
312 | |
313 #endif | |
314 | |
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315 cl->next = NULL; |
469 | 316 *ll = cl; |
317 ll = &cl->next; | |
318 } | |
319 | |
320 return NGX_OK; | |
321 } | |
322 | |
323 | |
499 | 324 static ngx_int_t |
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325 ngx_output_chain_align_file_buf(ngx_output_chain_ctx_t *ctx, off_t bsize) |
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326 { |
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327 size_t size; |
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328 ngx_buf_t *in; |
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329 |
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330 in = ctx->in->buf; |
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331 |
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332 if (in->file == NULL || !in->file->directio) { |
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333 return NGX_DECLINED; |
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334 } |
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335 |
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336 ctx->directio = 1; |
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337 |
3053 | 338 size = (size_t) (in->file_pos - (in->file_pos & ~(ctx->alignment - 1))); |
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339 |
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340 if (size == 0) { |
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341 |
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342 if (bsize >= (off_t) ctx->bufs.size) { |
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343 return NGX_DECLINED; |
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344 } |
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345 |
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346 size = (size_t) bsize; |
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347 |
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348 } else { |
3053 | 349 size = ctx->alignment - size; |
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350 |
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351 if ((off_t) size > bsize) { |
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352 size = (size_t) bsize; |
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353 } |
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354 } |
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355 |
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356 ctx->buf = ngx_create_temp_buf(ctx->pool, size); |
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357 if (ctx->buf == NULL) { |
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358 return NGX_ERROR; |
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359 } |
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360 |
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361 /* |
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362 * we do not set ctx->buf->tag, because we do not want |
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363 * to reuse the buf via ctx->free list |
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364 */ |
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365 |
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366 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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367 ctx->unaligned = 1; |
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368 #endif |
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369 |
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370 return NGX_OK; |
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371 } |
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372 |
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373 |
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374 static ngx_int_t |
2230 | 375 ngx_output_chain_get_buf(ngx_output_chain_ctx_t *ctx, off_t bsize) |
376 { | |
377 size_t size; | |
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378 ngx_buf_t *b, *in; |
2230 | 379 ngx_uint_t recycled; |
380 | |
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381 in = ctx->in->buf; |
2230 | 382 size = ctx->bufs.size; |
383 recycled = 1; | |
384 | |
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385 if (in->last_in_chain) { |
2230 | 386 |
387 if (bsize < (off_t) size) { | |
388 | |
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389 /* |
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390 * allocate a small temp buf for a small last buf |
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391 * or its small last part |
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392 */ |
2230 | 393 |
394 size = (size_t) bsize; | |
395 recycled = 0; | |
396 | |
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397 } else if (!ctx->directio |
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398 && ctx->bufs.num == 1 |
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399 && (bsize < (off_t) (size + size / 4))) |
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400 { |
2230 | 401 /* |
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402 * allocate a temp buf that equals to a last buf, |
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403 * if there is no directio, the last buf size is lesser |
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404 * than 1.25 of bufs.size and the temp buf is single |
2230 | 405 */ |
406 | |
407 size = (size_t) bsize; | |
408 recycled = 0; | |
409 } | |
410 } | |
411 | |
412 b = ngx_calloc_buf(ctx->pool); | |
413 if (b == NULL) { | |
414 return NGX_ERROR; | |
415 } | |
416 | |
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417 if (ctx->directio) { |
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418 |
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419 /* |
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420 * allocate block aligned to a disk sector size to enable |
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421 * userland buffer direct usage conjunctly with directio |
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422 */ |
2230 | 423 |
3053 | 424 b->start = ngx_pmemalign(ctx->pool, size, ctx->alignment); |
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425 if (b->start == NULL) { |
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426 return NGX_ERROR; |
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427 } |
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428 |
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429 } else { |
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430 b->start = ngx_palloc(ctx->pool, size); |
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431 if (b->start == NULL) { |
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432 return NGX_ERROR; |
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433 } |
2230 | 434 } |
435 | |
436 b->pos = b->start; | |
437 b->last = b->start; | |
438 b->end = b->last + size; | |
439 b->temporary = 1; | |
440 b->tag = ctx->tag; | |
441 b->recycled = recycled; | |
442 | |
443 ctx->buf = b; | |
444 ctx->allocated++; | |
445 | |
446 return NGX_OK; | |
447 } | |
448 | |
449 | |
450 static ngx_int_t | |
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451 ngx_output_chain_copy_buf(ngx_output_chain_ctx_t *ctx) |
160
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452 { |
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453 off_t size; |
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454 ssize_t n; |
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455 ngx_buf_t *src, *dst; |
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456 ngx_uint_t sendfile; |
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457 |
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458 src = ctx->in->buf; |
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459 dst = ctx->buf; |
160
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460 |
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461 size = ngx_buf_size(src); |
160
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462 |
473 | 463 if (size > dst->end - dst->pos) { |
160
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464 size = dst->end - dst->pos; |
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465 } |
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466 |
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467 sendfile = ctx->sendfile & !ctx->directio; |
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468 |
469 | 469 #if (NGX_SENDFILE_LIMIT) |
470 | |
471 if (src->in_file && src->file_pos >= NGX_SENDFILE_LIMIT) { | |
472 sendfile = 0; | |
473 } | |
474 | |
475 #endif | |
476 | |
343
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477 if (ngx_buf_in_memory(src)) { |
473 | 478 ngx_memcpy(dst->pos, src->pos, (size_t) size); |
479 src->pos += (size_t) size; | |
480 dst->last += (size_t) size; | |
160
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481 |
455 | 482 if (src->in_file) { |
483 | |
484 if (sendfile) { | |
485 dst->in_file = 1; | |
486 dst->file = src->file; | |
487 dst->file_pos = src->file_pos; | |
488 dst->file_last = src->file_pos + size; | |
489 | |
490 } else { | |
491 dst->in_file = 0; | |
492 } | |
493 | |
160
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494 src->file_pos += size; |
452 | 495 |
496 } else { | |
497 dst->in_file = 0; | |
160
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498 } |
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499 |
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500 if (src->pos == src->last) { |
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501 dst->flush = src->flush; |
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502 dst->last_buf = src->last_buf; |
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503 dst->last_in_chain = src->last_in_chain; |
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504 } |
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505 |
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506 } else { |
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507 |
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508 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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509 |
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510 if (ctx->unaligned) { |
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511 if (ngx_directio_off(src->file->fd) == -1) { |
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512 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, ngx_errno, |
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513 ngx_directio_off_n " \"%s\" failed", |
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514 src->file->name.data); |
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515 } |
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516 } |
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517 |
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518 #endif |
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519 |
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520 #if (NGX_HAVE_FILE_AIO) |
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521 |
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522 if (ctx->aio) { |
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523 n = ngx_file_aio_read(src->file, dst->pos, (size_t) size, |
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524 src->file_pos, ctx->pool); |
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525 if (n == NGX_AGAIN) { |
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Igor Sysoev <igor@sysoev.ru>
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|
526 ctx->aio(ctx, src->file); |
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527 return NGX_AGAIN; |
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parents:
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|
528 } |
6060225e9261
FreeBSD and Linux AIO support
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parents:
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|
529 |
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FreeBSD and Linux AIO support
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|
530 } else { |
6060225e9261
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diff
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531 n = ngx_read_file(src->file, dst->pos, (size_t) size, |
6060225e9261
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532 src->file_pos); |
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parents:
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533 } |
6060225e9261
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534 #else |
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535 |
473 | 536 n = ngx_read_file(src->file, dst->pos, (size_t) size, src->file_pos); |
160
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parents:
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537 |
3052
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FreeBSD and Linux AIO support
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538 #endif |
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|
539 |
2248
1adec90a0e46
disable directio for unaligned reads in Linux
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diff
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540 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
1adec90a0e46
disable directio for unaligned reads in Linux
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|
541 |
1adec90a0e46
disable directio for unaligned reads in Linux
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parents:
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diff
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542 if (ctx->unaligned) { |
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543 ngx_err_t err; |
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544 |
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545 err = ngx_errno; |
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disable directio for unaligned reads in Linux
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546 |
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disable directio for unaligned reads in Linux
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547 if (ngx_directio_on(src->file->fd) == -1) { |
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diff
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548 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, ngx_errno, |
1adec90a0e46
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parents:
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549 ngx_directio_on_n " \"%s\" failed", |
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parents:
2245
diff
changeset
|
550 src->file->name.data); |
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disable directio for unaligned reads in Linux
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parents:
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551 } |
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disable directio for unaligned reads in Linux
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
552 |
1adec90a0e46
disable directio for unaligned reads in Linux
Igor Sysoev <igor@sysoev.ru>
parents:
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changeset
|
553 ngx_set_errno(err); |
1adec90a0e46
disable directio for unaligned reads in Linux
Igor Sysoev <igor@sysoev.ru>
parents:
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changeset
|
554 |
1adec90a0e46
disable directio for unaligned reads in Linux
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parents:
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|
555 ctx->unaligned = 0; |
1adec90a0e46
disable directio for unaligned reads in Linux
Igor Sysoev <igor@sysoev.ru>
parents:
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|
556 } |
1adec90a0e46
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557 |
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|
558 #endif |
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559 |
160
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parents:
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|
560 if (n == NGX_ERROR) { |
517 | 561 return (ngx_int_t) n; |
160
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parents:
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562 } |
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parents:
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|
563 |
473 | 564 if (n != size) { |
2231
8564129d49b6
*) handle unaligned file part for directio
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parents:
2230
diff
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|
565 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
2245
8a98616abb73
add filename to the log message
Igor Sysoev <igor@sysoev.ru>
parents:
2240
diff
changeset
|
566 ngx_read_file_n " read only %z of %O from \"%s\"", |
8a98616abb73
add filename to the log message
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parents:
2240
diff
changeset
|
567 n, size, src->file->name.data); |
160
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parents:
diff
changeset
|
568 if (n == 0) { |
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nginx-0.0.1-2003-10-27-11:53:49 import
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|
569 return NGX_ERROR; |
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parents:
diff
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|
570 } |
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parents:
diff
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|
571 } |
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parents:
diff
changeset
|
572 |
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parents:
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|
573 dst->last += n; |
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|
574 |
452 | 575 if (sendfile) { |
576 dst->in_file = 1; | |
577 dst->file = src->file; | |
578 dst->file_pos = src->file_pos; | |
455 | 579 dst->file_last = src->file_pos + n; |
452 | 580 |
581 } else { | |
343
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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
|
582 dst->in_file = 0; |
160
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parents:
diff
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|
583 } |
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|
584 |
455 | 585 src->file_pos += n; |
586 | |
1238 | 587 if (src->file_pos == src->file_last) { |
1227
3e40f3e4376c
inherit flush flag, this fixes https proxying
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
588 dst->flush = src->flush; |
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inherit flush flag, this fixes https proxying
Igor Sysoev <igor@sysoev.ru>
parents:
1226
diff
changeset
|
589 dst->last_buf = src->last_buf; |
2899
61d5b945730a
fix XSLT filter in SSI subrequests
Igor Sysoev <igor@sysoev.ru>
parents:
2316
diff
changeset
|
590 dst->last_in_chain = src->last_in_chain; |
160
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parents:
diff
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|
591 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
592 } |
e7e094d34162
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parents:
diff
changeset
|
593 |
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nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
594 return NGX_OK; |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
diff
changeset
|
595 } |
162
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nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
596 |
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nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
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|
597 |
499 | 598 ngx_int_t |
599 ngx_chain_writer(void *data, ngx_chain_t *in) | |
162
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diff
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|
600 { |
166
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
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parents:
164
diff
changeset
|
601 ngx_chain_writer_ctx_t *ctx = data; |
162
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parents:
160
diff
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|
602 |
1962 | 603 off_t size; |
604 ngx_chain_t *cl; | |
605 ngx_connection_t *c; | |
606 | |
607 c = ctx->connection; | |
162
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160
diff
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|
608 |
473 | 609 for (size = 0; in; in = in->next) { |
610 | |
611 #if 1 | |
612 if (ngx_buf_size(in->buf) == 0 && !ngx_buf_special(in->buf)) { | |
613 ngx_debug_point(); | |
614 } | |
615 #endif | |
616 | |
617 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
|
618 |
1962 | 619 ngx_log_debug2(NGX_LOG_DEBUG_CORE, c->log, 0, |
1226 | 620 "chain writer buf fl:%d s:%uO", |
621 in->buf->flush, 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
|
622 |
501 | 623 cl = ngx_alloc_chain_link(ctx->pool); |
624 if (cl == NULL) { | |
461 | 625 return NGX_ERROR; |
626 } | |
501 | 627 |
461 | 628 cl->buf = in->buf; |
629 cl->next = NULL; | |
162
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parents:
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diff
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|
630 *ctx->last = cl; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
631 ctx->last = &cl->next; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
632 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
633 |
1962 | 634 ngx_log_debug1(NGX_LOG_DEBUG_CORE, c->log, 0, |
461 | 635 "chain writer in: %p", ctx->out); |
291
117ccc7c4055
nginx-0.0.3-2004-03-16-16:35:20 import
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parents:
257
diff
changeset
|
636 |
473 | 637 for (cl = ctx->out; cl; cl = cl->next) { |
638 | |
639 #if 1 | |
640 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
641 ngx_debug_point(); | |
642 } | |
643 | |
644 #endif | |
645 | |
646 size += ngx_buf_size(cl->buf); | |
647 } | |
648 | |
1962 | 649 if (size == 0 && !c->buffered) { |
473 | 650 return NGX_OK; |
651 } | |
652 | |
1962 | 653 ctx->out = c->send_chain(c, ctx->out, ctx->limit); |
162
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diff
changeset
|
654 |
1962 | 655 ngx_log_debug1(NGX_LOG_DEBUG_CORE, c->log, 0, |
461 | 656 "chain writer out: %p", ctx->out); |
291
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nginx-0.0.3-2004-03-16-16:35:20 import
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parents:
257
diff
changeset
|
657 |
162
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parents:
160
diff
changeset
|
658 if (ctx->out == NGX_CHAIN_ERROR) { |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
659 return NGX_ERROR; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
660 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
661 |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
662 if (ctx->out == NULL) { |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
160
diff
changeset
|
663 ctx->last = &ctx->out; |
1211 | 664 |
1962 | 665 if (!c->buffered) { |
1215
fb3ff245c96b
an request body might not be passed to backend,
Igor Sysoev <igor@sysoev.ru>
parents:
1211
diff
changeset
|
666 return NGX_OK; |
fb3ff245c96b
an request body might not be passed to backend,
Igor Sysoev <igor@sysoev.ru>
parents:
1211
diff
changeset
|
667 } |
162
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160
diff
changeset
|
668 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
669 |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
670 return NGX_AGAIN; |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
changeset
|
671 } |