Mercurial > hg > nginx
annotate src/os/unix/ngx_linux_sendfile_chain.c @ 7297:a10e5fe44762
Upstream: disable body cleanup with preserve_output (ticket #1565).
With u->conf->preserve_output set the request body file might be used
after the response header is sent, so avoid cleaning it. (Normally
this is not a problem as u->conf->preserve_output is only set with
r->request_body_no_buffering, but the request body might be already
written to a file in a different context.)
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 13 Jun 2018 15:28:11 +0300 |
parents | 400a3412b1e3 |
children | a2613fc1bce5 |
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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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 static ssize_t ngx_linux_sendfile(ngx_connection_t *c, ngx_buf_t *file, |
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14 size_t size); |
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15 |
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16 #if (NGX_THREADS) |
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17 #include <ngx_thread_pool.h> |
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18 |
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19 #if !(NGX_HAVE_SENDFILE64) |
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20 #error sendfile64() is required! |
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21 #endif |
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22 |
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23 static ssize_t ngx_linux_sendfile_thread(ngx_connection_t *c, ngx_buf_t *file, |
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24 size_t size); |
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25 static void ngx_linux_sendfile_thread_handler(void *data, ngx_log_t *log); |
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26 #endif |
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27 |
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28 |
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29 /* |
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30 * On Linux up to 2.4.21 sendfile() (syscall #187) works with 32-bit |
479 | 31 * offsets only, and the including <sys/sendfile.h> breaks the compiling, |
32 * if off_t is 64 bit wide. So we use own sendfile() definition, where offset | |
33 * parameter is int32_t, and use sendfile() for the file parts below 2G only, | |
34 * see src/os/unix/ngx_linux_config.h | |
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35 * |
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36 * Linux 2.4.21 has the new sendfile64() syscall #239. |
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37 * |
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38 * On Linux up to 2.6.16 sendfile() does not allow to pass the count parameter |
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39 * more than 2G-1 bytes even on 64-bit platforms: it returns EINVAL, |
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40 * so we limit it to 2G-1 bytes. |
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41 */ |
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42 |
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43 #define NGX_SENDFILE_MAXSIZE 2147483647L |
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44 |
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45 |
585 | 46 ngx_chain_t * |
47 ngx_linux_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
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48 { |
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49 int tcp_nodelay; |
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50 off_t send, prev_send; |
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51 size_t file_size, sent; |
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52 ssize_t n; |
589 | 53 ngx_err_t err; |
54 ngx_buf_t *file; | |
55 ngx_event_t *wev; | |
56 ngx_chain_t *cl; | |
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57 ngx_iovec_t header; |
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58 struct iovec headers[NGX_IOVS_PREALLOCATE]; |
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59 |
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60 wev = c->write; |
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61 |
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62 if (!wev->ready) { |
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63 return in; |
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64 } |
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65 |
473 | 66 |
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67 /* the maximum limit size is 2G-1 - the page size */ |
473 | 68 |
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69 if (limit == 0 || limit > (off_t) (NGX_SENDFILE_MAXSIZE - ngx_pagesize)) { |
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70 limit = NGX_SENDFILE_MAXSIZE - ngx_pagesize; |
473 | 71 } |
72 | |
73 | |
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74 send = 0; |
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75 |
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76 header.iovs = headers; |
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77 header.nalloc = NGX_IOVS_PREALLOCATE; |
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78 |
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79 for ( ;; ) { |
473 | 80 prev_send = send; |
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81 |
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82 /* create the 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); |
479 | 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 /* set TCP_CORK if there is a header before a file */ |
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94 if (c->tcp_nopush == NGX_TCP_NOPUSH_UNSET |
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95 && header.count != 0 |
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96 && cl |
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97 && cl->buf->in_file) |
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98 { |
473 | 99 /* the TCP_CORK and TCP_NODELAY are mutually exclusive */ |
100 | |
483 | 101 if (c->tcp_nodelay == NGX_TCP_NODELAY_SET) { |
473 | 102 |
103 tcp_nodelay = 0; | |
104 | |
105 if (setsockopt(c->fd, IPPROTO_TCP, TCP_NODELAY, | |
106 (const void *) &tcp_nodelay, sizeof(int)) == -1) | |
107 { | |
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108 err = ngx_socket_errno; |
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109 |
473 | 110 /* |
479 | 111 * there is a tiny chance to be interrupted, however, |
473 | 112 * we continue a processing with the TCP_NODELAY |
113 * and without the TCP_CORK | |
114 */ | |
115 | |
577 | 116 if (err != NGX_EINTR) { |
473 | 117 wev->error = 1; |
483 | 118 ngx_connection_error(c, err, |
473 | 119 "setsockopt(TCP_NODELAY) failed"); |
120 return NGX_CHAIN_ERROR; | |
121 } | |
122 | |
123 } else { | |
483 | 124 c->tcp_nodelay = NGX_TCP_NODELAY_UNSET; |
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125 |
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126 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, |
473 | 127 "no tcp_nodelay"); |
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128 } |
473 | 129 } |
130 | |
483 | 131 if (c->tcp_nodelay == NGX_TCP_NODELAY_UNSET) { |
473 | 132 |
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133 if (ngx_tcp_nopush(c->fd) == -1) { |
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134 err = ngx_socket_errno; |
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135 |
473 | 136 /* |
479 | 137 * there is a tiny chance to be interrupted, however, |
473 | 138 * we continue a processing without the TCP_CORK |
139 */ | |
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140 |
577 | 141 if (err != NGX_EINTR) { |
473 | 142 wev->error = 1; |
143 ngx_connection_error(c, err, | |
144 ngx_tcp_nopush_n " failed"); | |
145 return NGX_CHAIN_ERROR; | |
146 } | |
147 | |
148 } else { | |
149 c->tcp_nopush = NGX_TCP_NOPUSH_SET; | |
577 | 150 |
473 | 151 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, |
152 "tcp_nopush"); | |
153 } | |
97
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154 } |
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155 } |
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156 |
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changeset
|
157 /* get the file buf */ |
97
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
158 |
5913
8e903522c17a
Introduced the ngx_output_chain_to_iovec() function.
Valentin Bartenev <vbart@nginx.com>
parents:
5912
diff
changeset
|
159 if (header.count == 0 && cl && cl->buf->in_file && send < limit) { |
344
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
160 file = cl->buf; |
97
70d2345a903f
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Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
161 |
344
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
162 /* coalesce the neighbouring file bufs */ |
97
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
163 |
5915
ac3f78219f85
Moved the code for coalescing file buffers to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents:
5913
diff
changeset
|
164 file_size = (size_t) ngx_chain_coalesce_file(&cl, limit - send); |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
344
diff
changeset
|
165 |
5915
ac3f78219f85
Moved the code for coalescing file buffers to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents:
5913
diff
changeset
|
166 send += file_size; |
589 | 167 #if 1 |
168 if (file_size == 0) { | |
169 ngx_debug_point(); | |
170 return NGX_CHAIN_ERROR; | |
171 } | |
172 #endif | |
6023
b550563ef96e
Added support for offloading Linux sendfile() in thread pools.
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diff
changeset
|
173 |
6949
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Simplified and improved sendfile() code on Linux.
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parents:
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diff
changeset
|
174 n = ngx_linux_sendfile(c, file, file_size); |
6023
b550563ef96e
Added support for offloading Linux sendfile() in thread pools.
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|
175 |
6949
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Simplified and improved sendfile() code on Linux.
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|
176 if (n == NGX_ERROR) { |
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|
177 return NGX_CHAIN_ERROR; |
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|
178 } |
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parents:
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diff
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179 |
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180 if (n == NGX_DONE) { |
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|
181 /* thread task posted */ |
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|
182 return in; |
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parents:
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diff
changeset
|
183 } |
6023
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Added support for offloading Linux sendfile() in thread pools.
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parents:
5997
diff
changeset
|
184 |
6949
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parents:
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diff
changeset
|
185 sent = (n == NGX_AGAIN) ? 0 : n; |
195
8dee38ea9117
nginx-0.0.1-2003-11-25-23:44:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
97
diff
changeset
|
186 |
8dee38ea9117
nginx-0.0.1-2003-11-25-23:44:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
97
diff
changeset
|
187 } else { |
5917
2c64b69daec5
Moved writev() handling code to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents:
5916
diff
changeset
|
188 n = ngx_writev(c, &header); |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
247
diff
changeset
|
189 |
5917
2c64b69daec5
Moved writev() handling code to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents:
5916
diff
changeset
|
190 if (n == NGX_ERROR) { |
2c64b69daec5
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parents:
5916
diff
changeset
|
191 return NGX_CHAIN_ERROR; |
97
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
192 } |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
193 |
5917
2c64b69daec5
Moved writev() handling code to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents:
5916
diff
changeset
|
194 sent = (n == NGX_AGAIN) ? 0 : n; |
97
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
195 } |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
196 |
195
8dee38ea9117
nginx-0.0.1-2003-11-25-23:44:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
97
diff
changeset
|
197 c->sent += sent; |
8dee38ea9117
nginx-0.0.1-2003-11-25-23:44:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
97
diff
changeset
|
198 |
5912
de68ed551bfb
Renamed ngx_handle_sent_chain() to ngx_chain_update_sent().
Valentin Bartenev <vbart@nginx.com>
parents:
5868
diff
changeset
|
199 in = ngx_chain_update_sent(in, sent); |
97
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
200 |
6949
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Maxim Dounin <mdounin@mdounin.ru>
parents:
6480
diff
changeset
|
201 if (n == NGX_AGAIN) { |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
344
diff
changeset
|
202 wev->ready = 0; |
5320
ad137a80919f
Don't lose pointer to first nonempty buf in ngx_*_sendfile_chain().
Gleb Smirnoff <glebius@nginx.com>
parents:
5222
diff
changeset
|
203 return in; |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
344
diff
changeset
|
204 } |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
344
diff
changeset
|
205 |
6949
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Simplified and improved sendfile() code on Linux.
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parents:
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diff
changeset
|
206 if ((size_t) (send - prev_send) != sent) { |
ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
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parents:
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|
207 |
ff0c8e11edbc
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
208 /* |
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Simplified and improved sendfile() code on Linux.
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diff
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|
209 * sendfile() on Linux 4.3+ might be interrupted at any time, |
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Simplified and improved sendfile() code on Linux.
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parents:
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diff
changeset
|
210 * and provides no indication if it was interrupted or not, |
ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
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diff
changeset
|
211 * so we have to retry till an explicit EAGAIN |
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
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|
212 * |
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|
213 * sendfile() in threads can also report less bytes written |
ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
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parents:
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diff
changeset
|
214 * than we are prepared to send now, since it was started in |
ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
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parents:
6480
diff
changeset
|
215 * some point in the past, so we again have to retry |
ff0c8e11edbc
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diff
changeset
|
216 */ |
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diff
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|
217 |
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parents:
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changeset
|
218 send = prev_send + sent; |
ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
219 continue; |
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Simplified and improved sendfile() code on Linux.
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diff
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|
220 } |
ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
221 |
5320
ad137a80919f
Don't lose pointer to first nonempty buf in ngx_*_sendfile_chain().
Gleb Smirnoff <glebius@nginx.com>
parents:
5222
diff
changeset
|
222 if (send >= limit || in == NULL) { |
ad137a80919f
Don't lose pointer to first nonempty buf in ngx_*_sendfile_chain().
Gleb Smirnoff <glebius@nginx.com>
parents:
5222
diff
changeset
|
223 return in; |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
344
diff
changeset
|
224 } |
97
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
225 } |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
226 } |
5997
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
Valentin Bartenev <vbart@nginx.com>
parents:
5918
diff
changeset
|
227 |
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
Valentin Bartenev <vbart@nginx.com>
parents:
5918
diff
changeset
|
228 |
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
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parents:
5918
diff
changeset
|
229 static ssize_t |
c901f2764c27
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diff
changeset
|
230 ngx_linux_sendfile(ngx_connection_t *c, ngx_buf_t *file, size_t size) |
c901f2764c27
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5918
diff
changeset
|
231 { |
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diff
changeset
|
232 #if (NGX_HAVE_SENDFILE64) |
c901f2764c27
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changeset
|
233 off_t offset; |
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diff
changeset
|
234 #else |
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diff
changeset
|
235 int32_t offset; |
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parents:
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diff
changeset
|
236 #endif |
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changeset
|
237 ssize_t n; |
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diff
changeset
|
238 ngx_err_t err; |
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|
239 |
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changeset
|
240 #if (NGX_THREADS) |
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241 |
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|
242 if (file->file->thread_handler) { |
ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
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|
243 return ngx_linux_sendfile_thread(c, file, size); |
ff0c8e11edbc
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|
244 } |
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|
245 |
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diff
changeset
|
246 #endif |
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|
247 |
5997
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5918
diff
changeset
|
248 #if (NGX_HAVE_SENDFILE64) |
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diff
changeset
|
249 offset = file->file_pos; |
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diff
changeset
|
250 #else |
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5918
diff
changeset
|
251 offset = (int32_t) file->file_pos; |
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|
252 #endif |
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|
253 |
c901f2764c27
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diff
changeset
|
254 eintr: |
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diff
changeset
|
255 |
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diff
changeset
|
256 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
c901f2764c27
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diff
changeset
|
257 "sendfile: @%O %uz", file->file_pos, size); |
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
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diff
changeset
|
258 |
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diff
changeset
|
259 n = sendfile(c->fd, file->file->fd, &offset, size); |
c901f2764c27
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parents:
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diff
changeset
|
260 |
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
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parents:
5918
diff
changeset
|
261 if (n == -1) { |
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Refactored ngx_linux_sendfile_chain() even more.
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parents:
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diff
changeset
|
262 err = ngx_errno; |
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
Valentin Bartenev <vbart@nginx.com>
parents:
5918
diff
changeset
|
263 |
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
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parents:
5918
diff
changeset
|
264 switch (err) { |
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
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5918
diff
changeset
|
265 case NGX_EAGAIN: |
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|
266 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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diff
changeset
|
267 "sendfile() is not ready"); |
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Refactored ngx_linux_sendfile_chain() even more.
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5918
diff
changeset
|
268 return NGX_AGAIN; |
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
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parents:
5918
diff
changeset
|
269 |
c901f2764c27
Refactored ngx_linux_sendfile_chain() even more.
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parents:
5918
diff
changeset
|
270 case NGX_EINTR: |
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diff
changeset
|
271 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
c901f2764c27
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parents:
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diff
changeset
|
272 "sendfile() was interrupted"); |
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5918
diff
changeset
|
273 goto eintr; |
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parents:
5918
diff
changeset
|
274 |
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275 default: |
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276 c->write->error = 1; |
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277 ngx_connection_error(c, err, "sendfile() failed"); |
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278 return NGX_ERROR; |
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279 } |
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280 } |
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281 |
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282 if (n == 0) { |
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283 /* |
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284 * if sendfile returns zero, then someone has truncated the file, |
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285 * so the offset became beyond the end of the file |
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286 */ |
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287 |
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288 ngx_log_error(NGX_LOG_ALERT, c->log, 0, |
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289 "sendfile() reported that \"%s\" was truncated at %O", |
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290 file->file->name.data, file->file_pos); |
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291 |
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292 return NGX_ERROR; |
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293 } |
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294 |
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295 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "sendfile: %z of %uz @%O", |
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296 n, size, file->file_pos); |
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297 |
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298 return n; |
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299 } |
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300 |
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301 |
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302 #if (NGX_THREADS) |
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303 |
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304 typedef struct { |
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305 ngx_buf_t *file; |
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306 ngx_socket_t socket; |
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307 size_t size; |
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308 |
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309 size_t sent; |
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310 ngx_err_t err; |
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311 } ngx_linux_sendfile_ctx_t; |
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312 |
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313 |
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314 static ssize_t |
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315 ngx_linux_sendfile_thread(ngx_connection_t *c, ngx_buf_t *file, size_t size) |
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316 { |
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317 ngx_event_t *wev; |
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318 ngx_thread_task_t *task; |
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319 ngx_linux_sendfile_ctx_t *ctx; |
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320 |
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321 ngx_log_debug3(NGX_LOG_DEBUG_CORE, c->log, 0, |
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322 "linux sendfile thread: %d, %uz, %O", |
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323 file->file->fd, size, file->file_pos); |
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324 |
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325 task = c->sendfile_task; |
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326 |
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327 if (task == NULL) { |
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328 task = ngx_thread_task_alloc(c->pool, sizeof(ngx_linux_sendfile_ctx_t)); |
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329 if (task == NULL) { |
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330 return NGX_ERROR; |
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331 } |
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332 |
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333 task->handler = ngx_linux_sendfile_thread_handler; |
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334 |
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335 c->sendfile_task = task; |
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336 } |
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337 |
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338 ctx = task->ctx; |
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339 wev = c->write; |
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340 |
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341 if (task->event.complete) { |
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342 task->event.complete = 0; |
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343 |
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344 if (ctx->err == NGX_EAGAIN) { |
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345 /* |
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346 * if wev->complete is set, this means that a write event |
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347 * happened while we were waiting for the thread task, so |
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348 * we have to retry sending even on EAGAIN |
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349 */ |
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350 |
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351 if (wev->complete) { |
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352 return 0; |
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353 } |
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354 |
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355 return NGX_AGAIN; |
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356 } |
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Fixed handling of EAGAIN with sendfile in threads.
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|
357 |
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Fixed handling of EAGAIN with sendfile in threads.
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358 if (ctx->err) { |
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359 wev->error = 1; |
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360 ngx_connection_error(c, ctx->err, "sendfile() failed"); |
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361 return NGX_ERROR; |
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|
362 } |
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363 |
6437
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|
364 if (ctx->sent == 0) { |
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365 /* |
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366 * if sendfile returns zero, then someone has truncated the file, |
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367 * so the offset became beyond the end of the file |
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368 */ |
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369 |
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370 ngx_log_error(NGX_LOG_ALERT, c->log, 0, |
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371 "sendfile() reported that \"%s\" was truncated at %O", |
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372 file->file->name.data, file->file_pos); |
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373 |
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374 return NGX_ERROR; |
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375 } |
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376 |
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377 return ctx->sent; |
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378 } |
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379 |
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380 if (task->event.active && ctx->file == file) { |
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381 /* |
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382 * tolerate duplicate calls; they can happen due to subrequests |
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383 * or multiple calls of the next body filter from a filter |
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384 */ |
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385 |
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386 return NGX_DONE; |
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387 } |
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388 |
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389 ctx->file = file; |
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390 ctx->socket = c->fd; |
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391 ctx->size = size; |
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392 |
6440
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Fixed timeouts with threaded sendfile() and subrequests.
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393 wev->complete = 0; |
6023
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394 |
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395 if (file->file->thread_handler(task, file->file) != NGX_OK) { |
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396 return NGX_ERROR; |
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397 } |
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398 |
6949
ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
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399 return NGX_DONE; |
6023
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400 } |
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401 |
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402 |
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403 static void |
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404 ngx_linux_sendfile_thread_handler(void *data, ngx_log_t *log) |
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405 { |
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406 ngx_linux_sendfile_ctx_t *ctx = data; |
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407 |
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408 off_t offset; |
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409 ssize_t n; |
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410 ngx_buf_t *file; |
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411 |
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412 ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "linux sendfile thread handler"); |
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413 |
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414 file = ctx->file; |
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415 offset = file->file_pos; |
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416 |
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417 again: |
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418 |
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419 n = sendfile(ctx->socket, file->file->fd, &offset, ctx->size); |
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420 |
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421 if (n == -1) { |
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422 ctx->err = ngx_errno; |
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423 |
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424 } else { |
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425 ctx->sent = n; |
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426 ctx->err = 0; |
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427 } |
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428 |
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429 #if 0 |
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430 ngx_time_update(); |
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431 #endif |
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432 |
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433 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, log, 0, |
6480 | 434 "sendfile: %z (err: %d) of %uz @%O", |
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435 n, ctx->err, ctx->size, file->file_pos); |
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436 |
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437 if (ctx->err == NGX_EINTR) { |
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438 goto again; |
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439 } |
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440 } |
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441 |
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442 #endif /* NGX_THREADS */ |