Mercurial > hg > nginx-quic
annotate src/event/ngx_event_acceptex.c @ 6673:e4c1f5b32868
Event pipe: do not set file's thread_handler if not needed.
This fixes a problem with aio threads and sendfile with aio_write switched
off, as observed with range requests after fc72784b1f52 (1.9.13). Potential
problems with sendfile in threads were previously described in 9fd738b85fad,
and this seems to be one of them.
The problem occurred as file's thread_handler was set to NULL by event pipe
code after a sendfile thread task was scheduled. As a result, no sendfile
completion code was executed, and the same buffer was additionally sent
using non-threaded sendfile. Fix is to avoid modifying file's thread_handler
if aio_write is switched off.
Note that with "aio_write on" it is still possible that sendfile will use
thread_handler as set by event pipe. This is believed to be safe though,
as handlers used are compatible.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Thu, 01 Sep 2016 20:05:23 +0300 |
parents | bcd442b585f0 |
children | fdc3d40979b0 |
rev | line source |
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441
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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. |
441
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5 */ |
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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 |
543 | 13 static void ngx_close_posted_connection(ngx_connection_t *c); |
14 | |
15 | |
16 void | |
17 ngx_event_acceptex(ngx_event_t *rev) | |
59
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18 { |
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19 ngx_listening_t *ls; |
59
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20 ngx_connection_t *c; |
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21 |
461 | 22 c = rev->data; |
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23 ls = c->listening; |
461 | 24 |
543 | 25 c->log->handler = ngx_accept_log_error; |
26 | |
461 | 27 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "AcceptEx: %d", c->fd); |
102
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28 |
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29 if (rev->ovlp.error) { |
103
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30 ngx_log_error(NGX_LOG_CRIT, c->log, rev->ovlp.error, |
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31 "AcceptEx() %V failed", &ls->addr_text); |
100
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32 return; |
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33 } |
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34 |
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35 /* SO_UPDATE_ACCEPT_CONTEXT is required for shutdown() to work */ |
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36 |
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37 if (setsockopt(c->fd, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT, |
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38 (char *) &ls->fd, sizeof(ngx_socket_t)) |
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39 == -1) |
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40 { |
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41 ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno, |
461 | 42 "setsockopt(SO_UPDATE_ACCEPT_CONTEXT) failed for %V", |
43 &c->addr_text); | |
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44 /* TODO: close socket */ |
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45 return; |
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46 } |
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47 |
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48 ngx_getacceptexsockaddrs(c->buffer->pos, |
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49 ls->post_accept_buffer_size, |
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50 ls->socklen + 16, |
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51 ls->socklen + 16, |
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52 &c->local_sockaddr, &c->local_socklen, |
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53 &c->sockaddr, &c->socklen); |
59
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54 |
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55 if (ls->post_accept_buffer_size) { |
103
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56 c->buffer->last += rev->available; |
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57 c->buffer->end = c->buffer->start + ls->post_accept_buffer_size; |
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58 |
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59 } else { |
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60 c->buffer = NULL; |
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61 } |
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62 |
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63 if (ls->addr_ntop) { |
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64 c->addr_text.data = ngx_pnalloc(c->pool, ls->addr_text_max_len); |
461 | 65 if (c->addr_text.data == NULL) { |
66 /* TODO: close socket */ | |
67 return; | |
68 } | |
69 | |
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70 c->addr_text.len = ngx_sock_ntop(c->sockaddr, c->socklen, |
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71 c->addr_text.data, |
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72 ls->addr_text_max_len, 0); |
461 | 73 if (c->addr_text.len == 0) { |
74 /* TODO: close socket */ | |
75 return; | |
76 } | |
77 } | |
78 | |
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79 ngx_event_post_acceptex(ls, 1); |
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80 |
561 | 81 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1); |
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82 |
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83 ls->handler(c); |
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84 |
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85 return; |
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86 |
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87 } |
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88 |
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89 |
543 | 90 ngx_int_t |
91 ngx_event_post_acceptex(ngx_listening_t *ls, ngx_uint_t n) | |
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92 { |
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93 u_long rcvd; |
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94 ngx_err_t err; |
543 | 95 ngx_log_t *log; |
96 ngx_uint_t i; | |
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97 ngx_event_t *rev, *wev; |
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98 ngx_socket_t s; |
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99 ngx_connection_t *c; |
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100 |
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101 for (i = 0; i < n; i++) { |
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102 |
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103 /* TODO: look up reused sockets */ |
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104 |
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105 s = ngx_socket(ls->sockaddr->sa_family, ls->type, 0); |
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106 |
543 | 107 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, &ls->log, 0, |
461 | 108 ngx_socket_n " s:%d", s); |
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109 |
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110 if (s == (ngx_socket_t) -1) { |
543 | 111 ngx_log_error(NGX_LOG_ALERT, &ls->log, ngx_socket_errno, |
112 ngx_socket_n " failed"); | |
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113 |
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114 return NGX_ERROR; |
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115 } |
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116 |
543 | 117 c = ngx_get_connection(s, &ls->log); |
118 | |
119 if (c == NULL) { | |
120 return NGX_ERROR; | |
121 } | |
122 | |
123 c->pool = ngx_create_pool(ls->pool_size, &ls->log); | |
124 if (c->pool == NULL) { | |
125 ngx_close_posted_connection(c); | |
126 return NGX_ERROR; | |
127 } | |
128 | |
129 log = ngx_palloc(c->pool, sizeof(ngx_log_t)); | |
130 if (log == NULL) { | |
131 ngx_close_posted_connection(c); | |
132 return NGX_ERROR; | |
103
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133 } |
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134 |
543 | 135 c->buffer = ngx_create_temp_buf(c->pool, ls->post_accept_buffer_size |
136 + 2 * (ls->socklen + 16)); | |
137 if (c->buffer == NULL) { | |
138 ngx_close_posted_connection(c); | |
139 return NGX_ERROR; | |
140 } | |
141 | |
142 c->local_sockaddr = ngx_palloc(c->pool, ls->socklen); | |
143 if (c->local_sockaddr == NULL) { | |
144 ngx_close_posted_connection(c); | |
145 return NGX_ERROR; | |
146 } | |
59
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147 |
543 | 148 c->sockaddr = ngx_palloc(c->pool, ls->socklen); |
149 if (c->sockaddr == NULL) { | |
150 ngx_close_posted_connection(c); | |
151 return NGX_ERROR; | |
152 } | |
153 | |
154 *log = ls->log; | |
155 c->log = log; | |
156 | |
157 c->recv = ngx_recv; | |
158 c->send = ngx_send; | |
577 | 159 c->recv_chain = ngx_recv_chain; |
543 | 160 c->send_chain = ngx_send_chain; |
161 | |
162 c->listening = ls; | |
163 | |
561 | 164 rev = c->read; |
165 wev = c->write; | |
59
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166 |
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167 rev->ovlp.event = rev; |
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168 wev->ovlp.event = wev; |
509 | 169 rev->handler = ngx_event_acceptex; |
59
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170 |
461 | 171 rev->ready = 1; |
172 wev->ready = 1; | |
59
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173 |
543 | 174 rev->log = c->log; |
175 wev->log = c->log; | |
59
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176 |
102
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177 if (ngx_add_event(rev, 0, NGX_IOCP_IO) == NGX_ERROR) { |
543 | 178 ngx_close_posted_connection(c); |
59
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179 return NGX_ERROR; |
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180 } |
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181 |
1633
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182 if (ngx_acceptex(ls->fd, s, c->buffer->pos, ls->post_accept_buffer_size, |
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183 ls->socklen + 16, ls->socklen + 16, |
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184 &rcvd, (LPOVERLAPPED) &rev->ovlp) |
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185 == 0) |
103
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186 { |
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187 err = ngx_socket_errno; |
103
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188 if (err != WSA_IO_PENDING) { |
543 | 189 ngx_log_error(NGX_LOG_ALERT, &ls->log, err, |
6504 | 190 "AcceptEx() %V failed", &ls->addr_text); |
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191 |
543 | 192 ngx_close_posted_connection(c); |
103
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193 return NGX_ERROR; |
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194 } |
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195 } |
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196 } |
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197 |
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198 return NGX_OK; |
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199 } |
543 | 200 |
201 | |
202 static void | |
203 ngx_close_posted_connection(ngx_connection_t *c) | |
204 { | |
205 ngx_socket_t fd; | |
206 | |
207 ngx_free_connection(c); | |
208 | |
209 fd = c->fd; | |
210 c->fd = (ngx_socket_t) -1; | |
211 | |
212 if (ngx_close_socket(fd) == -1) { | |
213 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno, | |
214 ngx_close_socket_n " failed"); | |
215 } | |
216 | |
217 if (c->pool) { | |
218 ngx_destroy_pool(c->pool); | |
219 } | |
220 } | |
221 | |
222 | |
223 u_char * | |
224 ngx_acceptex_log_error(ngx_log_t *log, u_char *buf, size_t len) | |
225 { | |
226 return ngx_snprintf(buf, len, " while posting AcceptEx() on %V", log->data); | |
227 } |