Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_writev_chain.c @ 4403:c8b9f62cb414
Fixed sched_setaffinity(2) to correctly pass size.
Second argument (cpusetsize) is size in bytes, not in bits. Previously
used constant 32 resulted in reading of uninitialized memory and caused
EINVAL to be returned on some Linux kernels.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 16 Jan 2012 11:13:48 +0000 |
parents | 6f6d7ea70805 |
children | d620f497c50f |
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 |
597 | 12 #if (IOV_MAX > 64) |
13 #define NGX_IOVS 64 | |
14 #else | |
15 #define NGX_IOVS IOV_MAX | |
16 #endif | |
429
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17 |
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18 |
501 | 19 ngx_chain_t * |
20 ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
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21 { |
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22 u_char *prev; |
461 | 23 ssize_t n, size, sent; |
473 | 24 off_t send, prev_send; |
429
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25 ngx_uint_t eintr, complete; |
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26 ngx_err_t err; |
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27 ngx_array_t vec; |
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28 ngx_chain_t *cl; |
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29 ngx_event_t *wev; |
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30 struct iovec *iov, iovs[NGX_IOVS]; |
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31 |
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32 wev = c->write; |
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33 |
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34 if (!wev->ready) { |
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35 return in; |
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36 } |
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37 |
469 | 38 #if (NGX_HAVE_KQUEUE) |
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39 |
587 | 40 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { |
537 | 41 (void) ngx_connection_error(c, wev->kq_errno, |
42 "kevent() reported about an closed connection"); | |
257
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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 |
473 | 49 /* the maximum limit size is the maximum size_t value - the page size */ |
50 | |
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51 if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) { |
477 | 52 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; |
473 | 53 } |
54 | |
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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; |
473 | 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 |
461 | 79 #if 1 |
80 if (!ngx_buf_in_memory(cl->buf)) { | |
81 ngx_debug_point(); | |
82 } | |
83 #endif | |
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) { |
561 | 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 { |
501 | 95 iov = ngx_array_push(&vec); |
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 switch (err) { |
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114 case NGX_EAGAIN: |
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115 break; |
257
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116 |
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117 case NGX_EINTR: |
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118 eintr = 1; |
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119 break; |
93
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120 |
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121 default: |
198
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122 wev->error = 1; |
537 | 123 (void) ngx_connection_error(c, err, "writev() failed"); |
198
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124 return NGX_CHAIN_ERROR; |
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125 } |
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126 |
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127 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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|
128 "writev() not ready"); |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
129 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
130 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
131 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
|
132 |
461 | 133 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
|
134 |
473 | 135 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
|
136 complete = 1; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
137 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
138 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
139 c->sent += sent; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
140 |
461 | 141 for (cl = in; cl; cl = cl->next) { |
142 | |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
143 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
|
144 continue; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
145 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
146 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
147 if (sent == 0) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
148 break; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
149 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
150 |
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
|
151 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
|
152 |
198
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
153 if (sent >= size) { |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
154 sent -= size; |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
155 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
|
156 |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
157 continue; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
158 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
159 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
160 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
|
161 |
34995c5ec6c4
nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
162 break; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
163 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
164 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
165 if (eintr) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
166 continue; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
167 } |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
168 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
169 if (!complete) { |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
170 wev->ready = 0; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
171 return cl; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
172 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
173 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
174 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
|
175 return cl; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
176 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
177 |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
178 in = cl; |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
179 } |
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
180 } |