Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_files.c @ 3363:b4aa418af6ef
libatomic_ops support
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 25 Nov 2009 17:55:25 +0000 |
parents | e19df6e65352 |
children | 515d50917016 |
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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11 #if (NGX_HAVE_FILE_AIO) |
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12 |
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13 ngx_uint_t ngx_file_aio = 1; |
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14 |
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15 #endif |
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16 |
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561 | 18 ssize_t |
19 ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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20 { |
561 | 21 ssize_t n; |
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23 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
461 | 24 "read: %d, %p, %uz, %O", file->fd, buf, size, offset); |
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469 | 26 #if (NGX_HAVE_PREAD) |
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27 |
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28 n = pread(file->fd, buf, size, offset); |
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29 |
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30 if (n == -1) { |
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31 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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32 "pread() \"%s\" failed", file->name.data); |
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33 return NGX_ERROR; |
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34 } |
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35 |
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36 #else |
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37 |
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38 if (file->sys_offset != offset) { |
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39 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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40 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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41 "lseek() \"%s\" failed", file->name.data); |
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42 return NGX_ERROR; |
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43 } |
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44 |
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45 file->sys_offset = offset; |
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46 } |
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47 |
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48 n = read(file->fd, buf, size); |
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49 |
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50 if (n == -1) { |
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51 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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52 "read() \"%s\" failed", file->name.data); |
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53 return NGX_ERROR; |
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54 } |
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55 |
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56 file->sys_offset += n; |
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57 |
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58 #endif |
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59 |
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60 file->offset += n; |
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61 |
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62 return n; |
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63 } |
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64 |
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65 |
561 | 66 ssize_t |
67 ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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68 { |
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69 ssize_t n, written; |
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70 |
461 | 71 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
72 "write: %d, %p, %uz, %O", file->fd, buf, size, offset); | |
73 | |
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74 written = 0; |
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75 |
469 | 76 #if (NGX_HAVE_PWRITE) |
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77 |
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78 for ( ;; ) { |
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79 n = pwrite(file->fd, buf, size, offset); |
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80 |
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81 if (n == -1) { |
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82 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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83 "pwrite() \"%s\" failed", file->name.data); |
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84 return NGX_ERROR; |
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85 } |
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86 |
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87 file->offset += n; |
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88 written += n; |
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89 |
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90 if ((size_t) n == size) { |
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91 return written; |
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92 } |
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93 |
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94 offset += n; |
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95 size -= n; |
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96 } |
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97 |
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98 #else |
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99 |
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100 if (file->sys_offset != offset) { |
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101 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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102 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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103 "lseek() \"%s\" failed", file->name.data); |
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104 return NGX_ERROR; |
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105 } |
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106 |
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107 file->sys_offset = offset; |
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108 } |
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109 |
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110 for ( ;; ) { |
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111 n = write(file->fd, buf, size); |
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112 |
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113 if (n == -1) { |
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114 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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115 "write() \"%s\" failed", file->name.data); |
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116 return NGX_ERROR; |
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117 } |
182
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118 |
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119 file->offset += n; |
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120 written += n; |
182
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122 if ((size_t) n == size) { |
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123 return written; |
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124 } |
182
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125 |
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126 size -= n; |
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127 } |
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128 #endif |
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129 } |
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130 |
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131 |
561 | 132 ngx_fd_t |
1046 | 133 ngx_open_tempfile(u_char *name, ngx_uint_t persistent, ngx_uint_t access) |
303
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134 { |
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135 ngx_fd_t fd; |
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136 |
1046 | 137 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, |
138 access ? access : 0600); | |
303
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139 |
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140 if (fd != -1 && !persistent) { |
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141 unlink((const char *) name); |
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142 } |
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143 |
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144 return fd; |
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145 } |
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146 |
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147 |
461 | 148 #define NGX_IOVS 8 |
149 | |
561 | 150 ssize_t |
151 ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset, | |
152 ngx_pool_t *pool) | |
74
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153 { |
290
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154 u_char *prev; |
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155 size_t size; |
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156 ssize_t n; |
461 | 157 ngx_array_t vec; |
158 struct iovec *iov, iovs[NGX_IOVS]; | |
74
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159 |
461 | 160 /* use pwrite() if there is the only buf in a chain */ |
74
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161 |
170
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162 if (cl->next == NULL) { |
343
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163 return ngx_write_file(file, cl->buf->pos, |
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164 (size_t) (cl->buf->last - cl->buf->pos), |
194
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165 offset); |
74
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166 } |
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167 |
461 | 168 vec.elts = iovs; |
169 vec.size = sizeof(struct iovec); | |
577 | 170 vec.nalloc = NGX_IOVS; |
461 | 171 vec.pool = pool; |
170
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172 |
461 | 173 do { |
174 prev = NULL; | |
175 iov = NULL; | |
176 size = 0; | |
170
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177 |
461 | 178 vec.nelts = 0; |
179 | |
180 /* create the iovec and coalesce the neighbouring bufs */ | |
170
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181 |
461 | 182 while (cl && vec.nelts < IOV_MAX) { |
183 if (prev == cl->buf->pos) { | |
184 iov->iov_len += cl->buf->last - cl->buf->pos; | |
74
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185 |
461 | 186 } else { |
501 | 187 iov = ngx_array_push(&vec); |
188 if (iov == NULL) { | |
461 | 189 return NGX_ERROR; |
190 } | |
191 | |
192 iov->iov_base = (void *) cl->buf->pos; | |
193 iov->iov_len = cl->buf->last - cl->buf->pos; | |
194 } | |
195 | |
196 size += cl->buf->last - cl->buf->pos; | |
197 prev = cl->buf->last; | |
198 cl = cl->next; | |
170
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199 } |
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200 |
461 | 201 /* use pwrite() if there is the only iovec buffer */ |
170
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202 |
461 | 203 if (vec.nelts == 1) { |
204 iov = vec.elts; | |
205 return ngx_write_file(file, (u_char *) iov[0].iov_base, | |
206 iov[0].iov_len, offset); | |
207 } | |
170
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208 |
461 | 209 if (file->sys_offset != offset) { |
210 if (lseek(file->fd, offset, SEEK_SET) == -1) { | |
211 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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212 "lseek() \"%s\" failed", file->name.data); |
461 | 213 return NGX_ERROR; |
214 } | |
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215 |
461 | 216 file->sys_offset = offset; |
217 } | |
218 | |
219 n = writev(file->fd, vec.elts, vec.nelts); | |
220 | |
221 if (n == -1) { | |
222 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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223 "writev() \"%s\" failed", file->name.data); |
154
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224 return NGX_ERROR; |
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225 } |
191
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226 |
461 | 227 if ((size_t) n != size) { |
228 ngx_log_error(NGX_LOG_CRIT, file->log, 0, | |
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229 "writev() \"%s\" has written only %z of %uz", |
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230 file->name.data, n, size); |
461 | 231 return NGX_ERROR; |
232 } | |
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233 |
461 | 234 file->sys_offset += n; |
235 file->offset += n; | |
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236 |
461 | 237 } while (cl); |
73
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238 |
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239 return n; |
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240 } |
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241 |
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242 |
561 | 243 ngx_int_t |
681 | 244 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s) |
245 { | |
246 struct timeval tv[2]; | |
247 | |
248 tv[0].tv_sec = s; | |
249 tv[0].tv_usec = 0; | |
250 tv[1].tv_sec = s; | |
251 tv[1].tv_usec = 0; | |
252 | |
253 if (utimes((char *) name, tv) != -1) { | |
254 return NGX_OK; | |
255 } | |
256 | |
257 return NGX_ERROR; | |
258 } | |
259 | |
260 | |
261 ngx_int_t | |
561 | 262 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) |
186
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263 { |
290
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264 dir->dir = opendir((const char *) name->data); |
186
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265 |
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266 if (dir->dir == NULL) { |
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267 return NGX_ERROR; |
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268 } |
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269 |
457 | 270 dir->valid_info = 0; |
186
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271 |
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272 return NGX_OK; |
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273 } |
561 | 274 |
275 | |
727 | 276 ngx_int_t |
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277 ngx_read_dir(ngx_dir_t *dir) |
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278 { |
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279 dir->de = readdir(dir->dir); |
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280 |
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281 if (dir->de) { |
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282 #if (NGX_HAVE_D_TYPE) |
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283 dir->type = dir->de->d_type; |
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284 #else |
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285 dir->type = 0; |
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286 #endif |
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287 return NGX_OK; |
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288 } |
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289 |
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290 return NGX_ERROR; |
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291 } |
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292 |
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293 |
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294 ngx_int_t |
727 | 295 ngx_open_glob(ngx_glob_t *gl) |
296 { | |
1980 | 297 int n; |
298 | |
299 n = glob((char *) gl->pattern, GLOB_NOSORT, NULL, &gl->pglob); | |
300 | |
301 if (n == 0) { | |
302 return NGX_OK; | |
303 } | |
304 | |
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305 #ifdef GLOB_NOMATCH |
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306 |
1980 | 307 if (n == GLOB_NOMATCH && gl->test) { |
727 | 308 return NGX_OK; |
309 } | |
310 | |
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311 #endif |
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312 |
727 | 313 return NGX_ERROR; |
314 } | |
315 | |
316 | |
317 ngx_int_t | |
318 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name) | |
319 { | |
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320 size_t count; |
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321 |
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322 #ifdef GLOB_NOMATCH |
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323 count = (size_t) gl->pglob.gl_pathc; |
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324 #else |
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325 count = (size_t) gl->pglob.gl_matchc; |
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326 #endif |
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327 |
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328 if (gl->n < count) { |
727 | 329 |
330 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]); | |
331 name->data = (u_char *) gl->pglob.gl_pathv[gl->n]; | |
332 gl->n++; | |
333 | |
334 return NGX_OK; | |
335 } | |
336 | |
337 return NGX_DONE; | |
338 } | |
339 | |
340 | |
341 void | |
342 ngx_close_glob(ngx_glob_t *gl) | |
343 { | |
344 globfree(&gl->pglob); | |
345 } | |
346 | |
347 | |
611 | 348 ngx_err_t |
349 ngx_trylock_fd(ngx_fd_t fd) | |
561 | 350 { |
351 struct flock fl; | |
352 | |
611 | 353 fl.l_start = 0; |
354 fl.l_len = 0; | |
355 fl.l_pid = 0; | |
356 fl.l_type = F_WRLCK; | |
561 | 357 fl.l_whence = SEEK_SET; |
611 | 358 |
359 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
360 return ngx_errno; | |
361 } | |
362 | |
363 return 0; | |
364 } | |
365 | |
366 | |
367 ngx_err_t | |
368 ngx_lock_fd(ngx_fd_t fd) | |
369 { | |
370 struct flock fl; | |
371 | |
372 fl.l_start = 0; | |
561 | 373 fl.l_len = 0; |
374 fl.l_pid = 0; | |
375 fl.l_type = F_WRLCK; | |
611 | 376 fl.l_whence = SEEK_SET; |
561 | 377 |
611 | 378 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
379 return ngx_errno; | |
561 | 380 } |
381 | |
611 | 382 return 0; |
561 | 383 } |
384 | |
385 | |
611 | 386 ngx_err_t |
387 ngx_unlock_fd(ngx_fd_t fd) | |
561 | 388 { |
389 struct flock fl; | |
390 | |
611 | 391 fl.l_start = 0; |
561 | 392 fl.l_len = 0; |
393 fl.l_pid = 0; | |
394 fl.l_type = F_UNLCK; | |
611 | 395 fl.l_whence = SEEK_SET; |
561 | 396 |
611 | 397 if (fcntl(fd, F_SETLK, &fl) == -1) { |
398 return ngx_errno; | |
561 | 399 } |
400 | |
611 | 401 return 0; |
561 | 402 } |
2129 | 403 |
404 | |
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405 #if (NGX_HAVE_POSIX_FADVISE) |
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406 |
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407 ngx_int_t |
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408 ngx_read_ahead(ngx_fd_t fd, size_t n) |
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409 { |
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410 int err; |
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411 |
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412 err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL); |
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413 |
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414 if (err == 0) { |
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415 return 0; |
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416 } |
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417 |
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418 ngx_set_errno(err); |
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419 return NGX_FILE_ERROR; |
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420 } |
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421 |
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422 #endif |
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423 |
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424 |
2129 | 425 #if (NGX_HAVE_O_DIRECT) |
426 | |
427 ngx_int_t | |
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428 ngx_directio_on(ngx_fd_t fd) |
2129 | 429 { |
430 int flags; | |
431 | |
432 flags = fcntl(fd, F_GETFL); | |
433 | |
434 if (flags == -1) { | |
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435 return NGX_FILE_ERROR; |
2129 | 436 } |
437 | |
438 return fcntl(fd, F_SETFL, flags | O_DIRECT); | |
439 } | |
440 | |
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441 |
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442 ngx_int_t |
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443 ngx_directio_off(ngx_fd_t fd) |
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444 { |
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445 int flags; |
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446 |
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447 flags = fcntl(fd, F_GETFL); |
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448 |
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449 if (flags == -1) { |
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450 return NGX_FILE_ERROR; |
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451 } |
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452 |
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453 return fcntl(fd, F_SETFL, flags & ~O_DIRECT); |
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454 } |
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455 |
2129 | 456 #endif |
2615 | 457 |
458 | |
459 #if (NGX_HAVE_STATFS) | |
460 | |
461 size_t | |
462 ngx_fs_bsize(u_char *name) | |
463 { | |
464 struct statfs fs; | |
465 | |
466 if (statfs((char *) name, &fs) == -1) { | |
467 return 512; | |
468 } | |
469 | |
470 if ((fs.f_bsize % 512) != 0) { | |
471 return 512; | |
472 } | |
473 | |
474 return (size_t) fs.f_bsize; | |
475 } | |
476 | |
477 #elif (NGX_HAVE_STATVFS) | |
478 | |
479 size_t | |
480 ngx_fs_bsize(u_char *name) | |
481 { | |
482 struct statvfs fs; | |
483 | |
484 if (statvfs((char *) name, &fs) == -1) { | |
485 return 512; | |
486 } | |
487 | |
488 if ((fs.f_frsize % 512) != 0) { | |
489 return 512; | |
490 } | |
491 | |
492 return (size_t) fs.f_frsize; | |
493 } | |
494 | |
495 #else | |
496 | |
497 size_t | |
498 ngx_fs_bsize(u_char *name) | |
499 { | |
500 return 512; | |
501 } | |
502 | |
503 #endif |