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annotate src/os/unix/ngx_darwin_sendfile_chain.c @ 9329:eebab9268326 default tip
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author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Sat, 31 Aug 2024 05:40:14 +0300 |
parents | 7cc2d3a96ea3 |
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rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 |
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12 |
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13 /* |
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14 * It seems that Darwin 9.4 (Mac OS X 1.5) sendfile() has the same |
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15 * old bug as early FreeBSD sendfile() syscall: |
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16 * http://bugs.freebsd.org/33771 |
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17 * |
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18 * Besides sendfile() has another bug: if one calls sendfile() |
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19 * with both a header and a trailer, then sendfile() ignores a file part |
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20 * at all and sends only the header and the trailer together. |
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21 * For this reason we send a trailer only if there is no a header. |
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22 * |
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23 * Although sendfile() allows to pass a header or a trailer, |
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24 * it may send the header or the trailer and a part of the file |
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25 * in different packets. And FreeBSD workaround (TCP_NOPUSH option) |
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26 * does not help. |
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27 */ |
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28 |
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29 |
501 | 30 ngx_chain_t * |
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31 ngx_darwin_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) |
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32 { |
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33 int rc; |
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34 off_t send, prev_send, sent; |
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35 off_t file_size; |
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36 ssize_t n; |
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37 ngx_uint_t eintr; |
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38 ngx_err_t err; |
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39 ngx_buf_t *file; |
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40 ngx_event_t *wev; |
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41 ngx_chain_t *cl; |
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42 ngx_iovec_t header, trailer; |
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43 struct sf_hdtr hdtr; |
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44 struct iovec headers[NGX_IOVS_PREALLOCATE]; |
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45 struct iovec trailers[NGX_IOVS_PREALLOCATE]; |
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46 |
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47 wev = c->write; |
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48 |
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49 if (!wev->ready) { |
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50 return in; |
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51 } |
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52 |
469 | 53 #if (NGX_HAVE_KQUEUE) |
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54 |
587 | 55 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { |
537 | 56 (void) ngx_connection_error(c, wev->kq_errno, |
57 "kevent() reported about an closed connection"); | |
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58 wev->error = 1; |
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59 return NGX_CHAIN_ERROR; |
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60 } |
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61 |
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62 #endif |
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63 |
473 | 64 /* the maximum limit size is the maximum size_t value - the page size */ |
65 | |
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66 if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) { |
477 | 67 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; |
473 | 68 } |
69 | |
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70 send = 0; |
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71 |
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72 header.iovs = headers; |
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73 header.nalloc = NGX_IOVS_PREALLOCATE; |
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74 |
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75 trailer.iovs = trailers; |
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76 trailer.nalloc = NGX_IOVS_PREALLOCATE; |
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77 |
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78 for ( ;; ) { |
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79 eintr = 0; |
473 | 80 prev_send = send; |
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81 |
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82 /* create the header iovec and coalesce the neighbouring bufs */ |
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83 |
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84 cl = ngx_output_chain_to_iovec(&header, in, limit - send, c->log); |
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85 |
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86 if (cl == NGX_CHAIN_ERROR) { |
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87 return NGX_CHAIN_ERROR; |
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88 } |
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89 |
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90 send += header.size; |
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91 |
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92 if (cl && cl->buf->in_file && send < limit) { |
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93 file = cl->buf; |
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94 |
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95 /* coalesce the neighbouring file bufs */ |
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96 |
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97 file_size = ngx_chain_coalesce_file(&cl, limit - send); |
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98 |
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99 send += file_size; |
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100 |
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101 if (header.count == 0 && send < limit) { |
455 | 102 |
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103 /* |
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104 * create the trailer iovec and coalesce the neighbouring bufs |
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105 */ |
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106 |
5919 | 107 cl = ngx_output_chain_to_iovec(&trailer, cl, limit - send, |
108 c->log); | |
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109 if (cl == NGX_CHAIN_ERROR) { |
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110 return NGX_CHAIN_ERROR; |
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111 } |
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112 |
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113 send += trailer.size; |
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114 |
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115 } else { |
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116 trailer.count = 0; |
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117 } |
63
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118 |
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119 /* |
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120 * sendfile() returns EINVAL if sf_hdtr's count is 0, |
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121 * but corresponding pointer is not NULL |
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122 */ |
253
b6793bc5034b
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diff
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123 |
5913
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124 hdtr.headers = header.count ? header.iovs : NULL; |
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125 hdtr.hdr_cnt = header.count; |
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126 hdtr.trailers = trailer.count ? trailer.iovs : NULL; |
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127 hdtr.trl_cnt = trailer.count; |
96
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128 |
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129 sent = header.size + file_size; |
153
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130 |
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131 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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132 "sendfile: @%O %O h:%uz", |
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133 file->file_pos, sent, header.size); |
203
c9da5900c79e
nginx-0.0.1-2003-12-02-08:47:29 import
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201
diff
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134 |
96
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135 rc = sendfile(file->file->fd, c->fd, file->file_pos, |
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136 &sent, &hdtr, 0); |
96
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137 |
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138 if (rc == -1) { |
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139 err = ngx_errno; |
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140 |
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141 switch (err) { |
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142 case NGX_EAGAIN: |
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143 break; |
216
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diff
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144 |
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145 case NGX_EINTR: |
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146 eintr = 1; |
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147 break; |
152
fb48bf4fea1c
nginx-0.0.1-2003-10-21-11:47:21 import
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diff
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148 |
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149 default: |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
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163
diff
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150 wev->error = 1; |
537 | 151 (void) ngx_connection_error(c, err, "sendfile() failed"); |
96
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152 return NGX_CHAIN_ERROR; |
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153 } |
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154 |
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155 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, err, |
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156 "sendfile() sent only %O bytes", sent); |
96
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nginx-0.0.1-2003-05-27-16:18:54 import
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94
diff
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|
157 } |
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158 |
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159 if (rc == 0 && sent == 0) { |
455 | 160 |
161 /* | |
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162 * if rc and sent equal to zero, then someone |
483 | 163 * has truncated the file, so the offset became beyond |
164 * the end of the file | |
455 | 165 */ |
166 | |
167 ngx_log_error(NGX_LOG_ALERT, c->log, 0, | |
168 "sendfile() reported that \"%s\" was truncated", | |
169 file->file->name.data); | |
170 | |
171 return NGX_CHAIN_ERROR; | |
172 } | |
173 | |
214
e0c502f15852
nginx-0.0.1-2003-12-22-12:40:48 import
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203
diff
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174 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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175 "sendfile: %d, @%O %O:%O", |
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Introduced the ngx_output_chain_to_iovec() function.
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|
176 rc, file->file_pos, sent, file_size + header.size); |
96
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94
diff
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|
177 |
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diff
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178 } else { |
5917
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Moved writev() handling code to a separate function.
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|
179 n = ngx_writev(c, &header); |
216
f1d0e5f09c1e
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214
diff
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180 |
5917
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181 if (n == NGX_ERROR) { |
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182 return NGX_CHAIN_ERROR; |
143
5526213be452
nginx-0.0.1-2003-10-10-19:10:50 import
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142
diff
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|
183 } |
89
29bf798b583f
nginx-0.0.1-2003-05-15-19:42:53 import
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parents:
88
diff
changeset
|
184 |
5917
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Moved writev() handling code to a separate function.
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185 sent = (n == NGX_AGAIN) ? 0 : n; |
96
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94
diff
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|
186 } |
63
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187 |
96
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188 c->sent += sent; |
63
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|
189 |
5912
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Renamed ngx_handle_sent_chain() to ngx_chain_update_sent().
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|
190 in = ngx_chain_update_sent(in, sent); |
96
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94
diff
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|
191 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
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361
diff
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|
192 if (eintr) { |
5868
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Fixed counting of sent bytes in the send chain functions on EINTR.
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diff
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|
193 send = prev_send + sent; |
362
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361
diff
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|
194 continue; |
152
fb48bf4fea1c
nginx-0.0.1-2003-10-21-11:47:21 import
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144
diff
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|
195 } |
96
a23d010f356d
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94
diff
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|
196 |
5851
150df089fe47
Removed the "complete" variable from various send chain functions.
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diff
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|
197 if (send - prev_send != sent) { |
362
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nginx-0.0.7-2004-06-21-19:59:32 import
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361
diff
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|
198 wev->ready = 0; |
5320
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Don't lose pointer to first nonempty buf in ngx_*_sendfile_chain().
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|
199 return in; |
362
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361
diff
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|
200 } |
152
fb48bf4fea1c
nginx-0.0.1-2003-10-21-11:47:21 import
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144
diff
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|
201 |
5320
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Don't lose pointer to first nonempty buf in ngx_*_sendfile_chain().
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diff
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|
202 if (send >= limit || in == NULL) { |
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Don't lose pointer to first nonempty buf in ngx_*_sendfile_chain().
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|
203 return in; |
362
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361
diff
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|
204 } |
142
cb77c084acdb
nginx-0.0.1-2003-10-09-11:00:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
103
diff
changeset
|
205 } |
63
36d2c25cc9bb
nginx-0.0.1-2003-02-26-23:21:43 import
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parents:
diff
changeset
|
206 } |