Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_writev_chain.c @ 587:284cc140593b release-0.3.15
nginx-0.3.15-RELEASE import
*) Feature: the new 444 code of the "return" directive to close
connection.
*) Feature: the "so_keepalive" directive in IMAP/POP3 proxy.
*) Bugfix: if there are unclosed connection nginx now calls abort()
only on gracefull quit and active "debug_points" directive.
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 07 Dec 2005 14:51:31 +0000 |
parents | 326634fb9d47 |
children | 9262f520ce21 |
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 |
441
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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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10 |
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11 |
461 | 12 #define NGX_IOVS 16 |
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13 |
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14 |
501 | 15 ngx_chain_t * |
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; |
461 | 19 ssize_t n, size, sent; |
473 | 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 |
469 | 34 #if (NGX_HAVE_KQUEUE) |
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35 |
587 | 36 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { |
537 | 37 (void) ngx_connection_error(c, wev->kq_errno, |
38 "kevent() reported about an closed connection"); | |
257
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39 wev->error = 1; |
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40 return NGX_CHAIN_ERROR; |
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41 } |
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42 |
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43 #endif |
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44 |
473 | 45 /* the maximum limit size is the maximum size_t value - the page size */ |
46 | |
477 | 47 if (limit == 0 || limit > NGX_MAX_SIZE_T_VALUE - ngx_pagesize) { |
48 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; | |
473 | 49 } |
50 | |
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51 send = 0; |
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52 complete = 0; |
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53 |
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54 vec.elts = iovs; |
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55 vec.size = sizeof(struct iovec); |
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56 vec.nalloc = NGX_IOVS; |
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57 vec.pool = c->pool; |
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58 |
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59 for ( ;; ) { |
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60 prev = NULL; |
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61 iov = NULL; |
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62 eintr = 0; |
473 | 63 prev_send = send; |
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64 |
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65 vec.nelts = 0; |
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66 |
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67 /* create the iovec and coalesce the neighbouring bufs */ |
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68 |
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69 for (cl = in; cl && vec.nelts < IOV_MAX && send < limit; cl = cl->next) |
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70 { |
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71 if (ngx_buf_special(cl->buf)) { |
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72 continue; |
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73 } |
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74 |
461 | 75 #if 1 |
76 if (!ngx_buf_in_memory(cl->buf)) { | |
77 ngx_debug_point(); | |
78 } | |
79 #endif | |
80 | |
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81 size = cl->buf->last - cl->buf->pos; |
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82 |
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83 if (send + size > limit) { |
561 | 84 size = (ssize_t) (limit - send); |
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85 } |
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86 |
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87 if (prev == cl->buf->pos) { |
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88 iov->iov_len += size; |
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89 |
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90 } else { |
501 | 91 iov = ngx_array_push(&vec); |
92 if (iov == NULL) { | |
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93 return NGX_CHAIN_ERROR; |
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94 } |
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95 |
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96 iov->iov_base = (void *) cl->buf->pos; |
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97 iov->iov_len = size; |
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98 } |
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99 |
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100 prev = cl->buf->pos + size; |
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101 send += size; |
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102 } |
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103 |
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104 n = writev(c->fd, vec.elts, vec.nelts); |
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105 |
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106 if (n == -1) { |
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107 err = ngx_errno; |
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108 |
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109 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
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110 if (err == NGX_EINTR) { |
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111 eintr = 1; |
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112 } |
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113 |
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114 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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115 "writev() not ready"); |
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116 |
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117 } else { |
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118 wev->error = 1; |
537 | 119 (void) ngx_connection_error(c, err, "writev() failed"); |
198
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120 return NGX_CHAIN_ERROR; |
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121 } |
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122 } |
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123 |
198
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nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
124 sent = n > 0 ? n : 0; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
125 |
461 | 126 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "writev: %z", sent); |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
127 |
473 | 128 if (send - prev_send == sent) { |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
129 complete = 1; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
130 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
131 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
132 c->sent += sent; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
133 |
461 | 134 for (cl = in; cl; cl = cl->next) { |
135 | |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
136 if (ngx_buf_special(cl->buf)) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
137 continue; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
138 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
139 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
140 if (sent == 0) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
141 break; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
142 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
143 |
343
6bdf858bff8c
nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents:
290
diff
changeset
|
144 size = cl->buf->last - cl->buf->pos; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
145 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
146 if (sent >= size) { |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
147 sent -= size; |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
148 cl->buf->pos = cl->buf->last; |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
149 |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
150 continue; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
151 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
152 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
153 cl->buf->pos += sent; |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
154 |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
155 break; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
156 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
157 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
158 if (eintr) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
159 continue; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
160 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
161 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
162 if (!complete) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
163 wev->ready = 0; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
164 return cl; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
165 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
166 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
167 if (send >= limit || cl == NULL) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
168 return cl; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
169 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
170 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
171 in = cl; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
172 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
173 } |