Mercurial > hg > nginx
annotate src/os/unix/ngx_files.c @ 5854:b63e829621ab
Generalized definitions of the number of preallocated iovec's.
No functional changes.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Wed, 13 Aug 2014 15:11:45 +0400 |
parents | 1e2d5d3f9f6b |
children | 1fdba317ee6d |
rev | line source |
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441
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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7 |
33
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 |
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11 |
3294
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12 #if (NGX_HAVE_FILE_AIO) |
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13 |
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14 ngx_uint_t ngx_file_aio = 1; |
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15 |
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16 #endif |
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17 |
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18 |
561 | 19 ssize_t |
20 ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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21 { |
561 | 22 ssize_t n; |
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23 |
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24 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
461 | 25 "read: %d, %p, %uz, %O", file->fd, buf, size, offset); |
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26 |
469 | 27 #if (NGX_HAVE_PREAD) |
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28 |
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29 n = pread(file->fd, buf, size, offset); |
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30 |
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31 if (n == -1) { |
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32 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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33 "pread() \"%s\" failed", file->name.data); |
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34 return NGX_ERROR; |
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35 } |
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36 |
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37 #else |
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38 |
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39 if (file->sys_offset != offset) { |
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40 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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41 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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42 "lseek() \"%s\" failed", file->name.data); |
182
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43 return NGX_ERROR; |
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44 } |
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45 |
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46 file->sys_offset = offset; |
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47 } |
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48 |
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49 n = read(file->fd, buf, size); |
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50 |
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51 if (n == -1) { |
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52 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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53 "read() \"%s\" failed", file->name.data); |
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54 return NGX_ERROR; |
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55 } |
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56 |
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57 file->sys_offset += n; |
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58 |
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59 #endif |
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60 |
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61 file->offset += n; |
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62 |
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63 return n; |
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64 } |
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65 |
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66 |
561 | 67 ssize_t |
68 ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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69 { |
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70 ssize_t n, written; |
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71 |
461 | 72 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
73 "write: %d, %p, %uz, %O", file->fd, buf, size, offset); | |
74 | |
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75 written = 0; |
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76 |
469 | 77 #if (NGX_HAVE_PWRITE) |
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78 |
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79 for ( ;; ) { |
3657 | 80 n = pwrite(file->fd, buf + written, size, offset); |
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81 |
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82 if (n == -1) { |
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83 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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84 "pwrite() \"%s\" failed", file->name.data); |
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85 return NGX_ERROR; |
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86 } |
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87 |
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88 file->offset += n; |
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89 written += n; |
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90 |
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91 if ((size_t) n == size) { |
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92 return written; |
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93 } |
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94 |
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95 offset += n; |
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96 size -= n; |
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97 } |
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98 |
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99 #else |
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100 |
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101 if (file->sys_offset != offset) { |
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102 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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103 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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104 "lseek() \"%s\" failed", file->name.data); |
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105 return NGX_ERROR; |
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106 } |
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107 |
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108 file->sys_offset = offset; |
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109 } |
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110 |
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111 for ( ;; ) { |
3657 | 112 n = write(file->fd, buf + written, size); |
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113 |
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114 if (n == -1) { |
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115 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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116 "write() \"%s\" failed", file->name.data); |
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117 return NGX_ERROR; |
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118 } |
182
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119 |
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120 file->offset += n; |
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121 written += n; |
182
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122 |
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123 if ((size_t) n == size) { |
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124 return written; |
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125 } |
182
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126 |
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127 size -= n; |
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128 } |
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129 #endif |
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130 } |
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131 |
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132 |
561 | 133 ngx_fd_t |
1046 | 134 ngx_open_tempfile(u_char *name, ngx_uint_t persistent, ngx_uint_t access) |
303
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135 { |
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136 ngx_fd_t fd; |
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137 |
1046 | 138 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, |
139 access ? access : 0600); | |
303
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140 |
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141 if (fd != -1 && !persistent) { |
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142 (void) unlink((const char *) name); |
303
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143 } |
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144 |
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145 return fd; |
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146 } |
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147 |
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148 |
461 | 149 #define NGX_IOVS 8 |
150 | |
561 | 151 ssize_t |
152 ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset, | |
153 ngx_pool_t *pool) | |
74
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154 { |
290
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155 u_char *prev; |
74
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156 size_t size; |
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157 ssize_t total, n; |
461 | 158 ngx_array_t vec; |
159 struct iovec *iov, iovs[NGX_IOVS]; | |
74
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160 |
461 | 161 /* use pwrite() if there is the only buf in a chain */ |
74
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162 |
170
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163 if (cl->next == NULL) { |
343
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164 return ngx_write_file(file, cl->buf->pos, |
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165 (size_t) (cl->buf->last - cl->buf->pos), |
194
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166 offset); |
74
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167 } |
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168 |
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169 total = 0; |
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170 |
461 | 171 vec.elts = iovs; |
172 vec.size = sizeof(struct iovec); | |
577 | 173 vec.nalloc = NGX_IOVS; |
461 | 174 vec.pool = pool; |
170
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175 |
461 | 176 do { |
177 prev = NULL; | |
178 iov = NULL; | |
179 size = 0; | |
170
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180 |
461 | 181 vec.nelts = 0; |
182 | |
183 /* create the iovec and coalesce the neighbouring bufs */ | |
170
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184 |
461 | 185 while (cl && vec.nelts < IOV_MAX) { |
186 if (prev == cl->buf->pos) { | |
187 iov->iov_len += cl->buf->last - cl->buf->pos; | |
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188 |
461 | 189 } else { |
501 | 190 iov = ngx_array_push(&vec); |
191 if (iov == NULL) { | |
461 | 192 return NGX_ERROR; |
193 } | |
194 | |
195 iov->iov_base = (void *) cl->buf->pos; | |
196 iov->iov_len = cl->buf->last - cl->buf->pos; | |
197 } | |
198 | |
199 size += cl->buf->last - cl->buf->pos; | |
200 prev = cl->buf->last; | |
201 cl = cl->next; | |
170
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202 } |
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203 |
461 | 204 /* use pwrite() if there is the only iovec buffer */ |
170
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205 |
461 | 206 if (vec.nelts == 1) { |
207 iov = vec.elts; | |
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208 |
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209 n = ngx_write_file(file, (u_char *) iov[0].iov_base, |
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210 iov[0].iov_len, offset); |
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211 |
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212 if (n == NGX_ERROR) { |
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213 return n; |
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214 } |
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215 |
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216 return total + n; |
461 | 217 } |
170
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218 |
461 | 219 if (file->sys_offset != offset) { |
220 if (lseek(file->fd, offset, SEEK_SET) == -1) { | |
221 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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222 "lseek() \"%s\" failed", file->name.data); |
461 | 223 return NGX_ERROR; |
224 } | |
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225 |
461 | 226 file->sys_offset = offset; |
227 } | |
228 | |
229 n = writev(file->fd, vec.elts, vec.nelts); | |
230 | |
231 if (n == -1) { | |
232 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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233 "writev() \"%s\" failed", file->name.data); |
154
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234 return NGX_ERROR; |
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235 } |
191
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236 |
461 | 237 if ((size_t) n != size) { |
238 ngx_log_error(NGX_LOG_CRIT, file->log, 0, | |
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239 "writev() \"%s\" has written only %z of %uz", |
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240 file->name.data, n, size); |
461 | 241 return NGX_ERROR; |
242 } | |
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243 |
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244 ngx_log_debug2(NGX_LOG_DEBUG_CORE, file->log, 0, |
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245 "writev: %d, %z", file->fd, n); |
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246 |
461 | 247 file->sys_offset += n; |
248 file->offset += n; | |
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249 offset += n; |
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250 total += n; |
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251 |
461 | 252 } while (cl); |
73
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253 |
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254 return total; |
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255 } |
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256 |
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257 |
561 | 258 ngx_int_t |
681 | 259 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s) |
260 { | |
261 struct timeval tv[2]; | |
262 | |
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263 tv[0].tv_sec = ngx_time(); |
681 | 264 tv[0].tv_usec = 0; |
265 tv[1].tv_sec = s; | |
266 tv[1].tv_usec = 0; | |
267 | |
268 if (utimes((char *) name, tv) != -1) { | |
269 return NGX_OK; | |
270 } | |
271 | |
272 return NGX_ERROR; | |
273 } | |
274 | |
275 | |
276 ngx_int_t | |
3651 | 277 ngx_create_file_mapping(ngx_file_mapping_t *fm) |
278 { | |
279 fm->fd = ngx_open_file(fm->name, NGX_FILE_RDWR, NGX_FILE_TRUNCATE, | |
280 NGX_FILE_DEFAULT_ACCESS); | |
281 if (fm->fd == NGX_INVALID_FILE) { | |
282 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
283 ngx_open_file_n " \"%s\" failed", fm->name); | |
284 return NGX_ERROR; | |
285 } | |
286 | |
287 if (ftruncate(fm->fd, fm->size) == -1) { | |
288 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
289 "ftruncate() \"%s\" failed", fm->name); | |
290 goto failed; | |
291 } | |
292 | |
293 fm->addr = mmap(NULL, fm->size, PROT_READ|PROT_WRITE, MAP_SHARED, | |
294 fm->fd, 0); | |
295 if (fm->addr != MAP_FAILED) { | |
296 return NGX_OK; | |
297 } | |
298 | |
299 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
300 "mmap(%uz) \"%s\" failed", fm->size, fm->name); | |
301 | |
302 failed: | |
303 | |
304 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
305 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
306 ngx_close_file_n " \"%s\" failed", fm->name); | |
307 } | |
308 | |
309 return NGX_ERROR; | |
310 } | |
311 | |
312 | |
313 void | |
314 ngx_close_file_mapping(ngx_file_mapping_t *fm) | |
315 { | |
316 if (munmap(fm->addr, fm->size) == -1) { | |
317 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
318 "munmap(%uz) \"%s\" failed", fm->size, fm->name); | |
319 } | |
320 | |
321 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
322 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
323 ngx_close_file_n " \"%s\" failed", fm->name); | |
324 } | |
325 } | |
326 | |
327 | |
328 ngx_int_t | |
561 | 329 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) |
186
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330 { |
290
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331 dir->dir = opendir((const char *) name->data); |
186
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332 |
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333 if (dir->dir == NULL) { |
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334 return NGX_ERROR; |
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335 } |
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336 |
457 | 337 dir->valid_info = 0; |
186
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338 |
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339 return NGX_OK; |
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340 } |
561 | 341 |
342 | |
727 | 343 ngx_int_t |
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344 ngx_read_dir(ngx_dir_t *dir) |
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345 { |
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346 dir->de = readdir(dir->dir); |
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347 |
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348 if (dir->de) { |
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349 #if (NGX_HAVE_D_TYPE) |
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350 dir->type = dir->de->d_type; |
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351 #else |
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352 dir->type = 0; |
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353 #endif |
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354 return NGX_OK; |
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355 } |
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356 |
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357 return NGX_ERROR; |
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358 } |
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359 |
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360 |
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361 ngx_int_t |
727 | 362 ngx_open_glob(ngx_glob_t *gl) |
363 { | |
1980 | 364 int n; |
365 | |
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366 n = glob((char *) gl->pattern, 0, NULL, &gl->pglob); |
1980 | 367 |
368 if (n == 0) { | |
369 return NGX_OK; | |
370 } | |
371 | |
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372 #ifdef GLOB_NOMATCH |
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373 |
1980 | 374 if (n == GLOB_NOMATCH && gl->test) { |
727 | 375 return NGX_OK; |
376 } | |
377 | |
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378 #endif |
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379 |
727 | 380 return NGX_ERROR; |
381 } | |
382 | |
383 | |
384 ngx_int_t | |
385 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name) | |
386 { | |
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387 size_t count; |
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388 |
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389 #ifdef GLOB_NOMATCH |
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390 count = (size_t) gl->pglob.gl_pathc; |
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391 #else |
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392 count = (size_t) gl->pglob.gl_matchc; |
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393 #endif |
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394 |
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395 if (gl->n < count) { |
727 | 396 |
397 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]); | |
398 name->data = (u_char *) gl->pglob.gl_pathv[gl->n]; | |
399 gl->n++; | |
400 | |
401 return NGX_OK; | |
402 } | |
403 | |
404 return NGX_DONE; | |
405 } | |
406 | |
407 | |
408 void | |
409 ngx_close_glob(ngx_glob_t *gl) | |
410 { | |
411 globfree(&gl->pglob); | |
412 } | |
413 | |
414 | |
611 | 415 ngx_err_t |
416 ngx_trylock_fd(ngx_fd_t fd) | |
561 | 417 { |
418 struct flock fl; | |
419 | |
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420 ngx_memzero(&fl, sizeof(struct flock)); |
611 | 421 fl.l_type = F_WRLCK; |
561 | 422 fl.l_whence = SEEK_SET; |
611 | 423 |
424 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
425 return ngx_errno; | |
426 } | |
427 | |
428 return 0; | |
429 } | |
430 | |
431 | |
432 ngx_err_t | |
433 ngx_lock_fd(ngx_fd_t fd) | |
434 { | |
435 struct flock fl; | |
436 | |
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437 ngx_memzero(&fl, sizeof(struct flock)); |
561 | 438 fl.l_type = F_WRLCK; |
611 | 439 fl.l_whence = SEEK_SET; |
561 | 440 |
611 | 441 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
442 return ngx_errno; | |
561 | 443 } |
444 | |
611 | 445 return 0; |
561 | 446 } |
447 | |
448 | |
611 | 449 ngx_err_t |
450 ngx_unlock_fd(ngx_fd_t fd) | |
561 | 451 { |
452 struct flock fl; | |
453 | |
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454 ngx_memzero(&fl, sizeof(struct flock)); |
561 | 455 fl.l_type = F_UNLCK; |
611 | 456 fl.l_whence = SEEK_SET; |
561 | 457 |
611 | 458 if (fcntl(fd, F_SETLK, &fl) == -1) { |
459 return ngx_errno; | |
561 | 460 } |
461 | |
611 | 462 return 0; |
561 | 463 } |
2129 | 464 |
465 | |
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466 #if (NGX_HAVE_POSIX_FADVISE) && !(NGX_HAVE_F_READAHEAD) |
3322
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467 |
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468 ngx_int_t |
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469 ngx_read_ahead(ngx_fd_t fd, size_t n) |
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470 { |
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471 int err; |
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472 |
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473 err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL); |
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474 |
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475 if (err == 0) { |
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476 return 0; |
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477 } |
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478 |
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479 ngx_set_errno(err); |
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480 return NGX_FILE_ERROR; |
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481 } |
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482 |
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483 #endif |
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484 |
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485 |
2129 | 486 #if (NGX_HAVE_O_DIRECT) |
487 | |
488 ngx_int_t | |
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489 ngx_directio_on(ngx_fd_t fd) |
2129 | 490 { |
491 int flags; | |
492 | |
493 flags = fcntl(fd, F_GETFL); | |
494 | |
495 if (flags == -1) { | |
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496 return NGX_FILE_ERROR; |
2129 | 497 } |
498 | |
499 return fcntl(fd, F_SETFL, flags | O_DIRECT); | |
500 } | |
501 | |
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502 |
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503 ngx_int_t |
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504 ngx_directio_off(ngx_fd_t fd) |
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505 { |
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506 int flags; |
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507 |
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508 flags = fcntl(fd, F_GETFL); |
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509 |
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510 if (flags == -1) { |
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511 return NGX_FILE_ERROR; |
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512 } |
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513 |
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514 return fcntl(fd, F_SETFL, flags & ~O_DIRECT); |
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515 } |
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516 |
2129 | 517 #endif |
2615 | 518 |
519 | |
520 #if (NGX_HAVE_STATFS) | |
521 | |
522 size_t | |
523 ngx_fs_bsize(u_char *name) | |
524 { | |
525 struct statfs fs; | |
526 | |
527 if (statfs((char *) name, &fs) == -1) { | |
528 return 512; | |
529 } | |
530 | |
531 if ((fs.f_bsize % 512) != 0) { | |
532 return 512; | |
533 } | |
534 | |
535 return (size_t) fs.f_bsize; | |
536 } | |
537 | |
538 #elif (NGX_HAVE_STATVFS) | |
539 | |
540 size_t | |
541 ngx_fs_bsize(u_char *name) | |
542 { | |
543 struct statvfs fs; | |
544 | |
545 if (statvfs((char *) name, &fs) == -1) { | |
546 return 512; | |
547 } | |
548 | |
549 if ((fs.f_frsize % 512) != 0) { | |
550 return 512; | |
551 } | |
552 | |
553 return (size_t) fs.f_frsize; | |
554 } | |
555 | |
556 #else | |
557 | |
558 size_t | |
559 ngx_fs_bsize(u_char *name) | |
560 { | |
561 return 512; | |
562 } | |
563 | |
564 #endif |