annotate src/os/unix/ngx_writev_chain.c @ 130:82d695e3d662 NGINX_0_3_12

nginx 0.3.12 *) Security: if nginx was built with the ngx_http_realip_module and the "satisfy_any on" directive was used, then access and authorization directives did not work. The ngx_http_realip_module was not built and is not built by default. *) Change: the "$time_gmt" variable name was changed to "$time_local". *) Change: the "proxy_header_buffer_size" and "fastcgi_header_buffer_size" directives was renamed to the "proxy_buffer_size" and "fastcgi_buffer_size" directives. *) Feature: the ngx_http_memcached_module. *) Feature: the "proxy_buffering" directive. *) Bugfix: the changes in accept mutex handling when the "rtsig" method was used; bug appeared in 0.3.0. *) Bugfix: if the client sent the "Transfer-Encoding: chunked" header line, then nginx returns the 411 error. *) Bugfix: if the "auth_basic" directive was inherited from the http level, then the realm in the "WWW-Authenticate" header line was without the "Basic realm" text. *) Bugfix: if the "combined" format was explicitly specified in the "access_log" directive, then the empty lines was written to the log; bug appeared in 0.3.8. *) Bugfix: nginx did not run on the sparc platform under any OS except Solaris. *) Bugfix: now it is not necessary to place space between the quoted string and closing bracket in the "if" directive.
author Igor Sysoev <http://sysoev.ru>
date Sat, 26 Nov 2005 00:00:00 +0300
parents dad2fe8ecf08
children 3656228c0b56
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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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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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11
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12 #define NGX_IOVS 16
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15 ngx_chain_t *
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16 ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
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17 {
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18 u_char *prev;
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19 ssize_t n, size, sent;
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20 off_t send, prev_send;
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21 ngx_uint_t eintr, complete;
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22 ngx_err_t err;
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23 ngx_array_t vec;
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24 ngx_chain_t *cl;
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25 ngx_event_t *wev;
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26 struct iovec *iov, iovs[NGX_IOVS];
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27
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28 wev = c->write;
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29
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30 if (!wev->ready) {
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31 return in;
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32 }
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33
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34 #if (NGX_HAVE_KQUEUE)
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35
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36 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT)
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37 && wev->pending_eof
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38 /* FreeBSD 5.x-6.x may erroneously report ETIMEDOUT */
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39 && wev->kq_errno != NGX_ETIMEDOUT)
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40 {
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41 (void) ngx_connection_error(c, wev->kq_errno,
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42 "kevent() reported about an closed connection");
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43 wev->error = 1;
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44 return NGX_CHAIN_ERROR;
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45 }
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46
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47 #endif
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48
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49 /* the maximum limit size is the maximum size_t value - the page size */
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51 if (limit == 0 || limit > NGX_MAX_SIZE_T_VALUE - ngx_pagesize) {
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52 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize;
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53 }
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54
0
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55 send = 0;
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56 complete = 0;
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57
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58 vec.elts = iovs;
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59 vec.size = sizeof(struct iovec);
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60 vec.nalloc = NGX_IOVS;
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61 vec.pool = c->pool;
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62
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63 for ( ;; ) {
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64 prev = NULL;
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65 iov = NULL;
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66 eintr = 0;
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67 prev_send = send;
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68
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69 vec.nelts = 0;
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70
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71 /* create the iovec and coalesce the neighbouring bufs */
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72
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73 for (cl = in; cl && vec.nelts < IOV_MAX && send < limit; cl = cl->next)
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74 {
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75 if (ngx_buf_special(cl->buf)) {
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76 continue;
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77 }
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78
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79 #if 1
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80 if (!ngx_buf_in_memory(cl->buf)) {
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81 ngx_debug_point();
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82 }
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83 #endif
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84
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85 size = cl->buf->last - cl->buf->pos;
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86
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87 if (send + size > limit) {
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88 size = (ssize_t) (limit - send);
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89 }
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90
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91 if (prev == cl->buf->pos) {
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92 iov->iov_len += size;
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93
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94 } else {
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95 iov = ngx_array_push(&vec);
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96 if (iov == NULL) {
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97 return NGX_CHAIN_ERROR;
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98 }
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99
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100 iov->iov_base = (void *) cl->buf->pos;
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101 iov->iov_len = size;
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102 }
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103
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104 prev = cl->buf->pos + size;
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105 send += size;
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106 }
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107
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108 n = writev(c->fd, vec.elts, vec.nelts);
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109
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110 if (n == -1) {
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111 err = ngx_errno;
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112
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113 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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114 if (err == NGX_EINTR) {
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115 eintr = 1;
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116 }
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117
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118 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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119 "writev() not ready");
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120
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121 } else {
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122 wev->error = 1;
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123 (void) ngx_connection_error(c, err, "writev() failed");
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124 return NGX_CHAIN_ERROR;
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125 }
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126 }
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127
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128 sent = n > 0 ? n : 0;
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129
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130 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "writev: %z", sent);
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131
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132 if (send - prev_send == sent) {
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133 complete = 1;
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134 }
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135
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136 c->sent += sent;
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137
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138 for (cl = in; cl; cl = cl->next) {
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139
0
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140 if (ngx_buf_special(cl->buf)) {
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141 continue;
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142 }
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143
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144 if (sent == 0) {
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145 break;
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146 }
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147
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148 size = cl->buf->last - cl->buf->pos;
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149
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150 if (sent >= size) {
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151 sent -= size;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
152 cl->buf->pos = cl->buf->last;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
153
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
154 continue;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
155 }
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
156
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
157 cl->buf->pos += sent;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
158
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
159 break;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
160 }
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
161
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
162 if (eintr) {
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
163 continue;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
164 }
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
165
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
166 if (!complete) {
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
167 wev->ready = 0;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
168 return cl;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
169 }
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
170
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
171 if (send >= limit || cl == NULL) {
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
172 return cl;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
173 }
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
174
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
175 in = cl;
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
176 }
f0b350454894 nginx 0.1.0
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
177 }