annotate src/os/unix/ngx_aio_write_chain.c @ 508:68c0ae0a4959 NGINX_0_7_66

nginx 0.7.66 *) Security: now nginx/Windows ignores default file stream name. Thanks to Jose Antonio Vazquez Gonzalez. *) Change: now the charset filter runs before the SSI filter. *) Change: now no message is written in an error log if a variable is not found by $r->variable() method. *) Change: now keepalive connections after POST requests are not disabled for MSIE 7.0+. Thanks to Adam Lounds. *) Feature: the "proxy_no_cache" and "fastcgi_no_cache" directives. *) Feature: now the "rewrite" directive does a redirect automatically if the $scheme variable is used. Thanks to Piotr Sikora. *) Feature: the "chunked_transfer_encoding" directive. *) Feature: the $geoip_city_continent_code, $geoip_latitude, and $geoip_longitude variables. Thanks to Arvind Sundararajan. *) Feature: now the ngx_http_image_filter_module deletes always EXIF and other application specific data if the data consume more than 5% of a JPEG file. *) Feature: now the "msie_padding" directive works for Chrome too. *) Workaround: now keepalive connections are disabled for Safari. Thanks to Joshua Sierles. *) Bugfix: nginx ignored the "private" and "no-store" values in the "Cache-Control" backend response header line. *) Bugfix: an "&" character was not escaped when it was copied in arguments part in a rewrite rule. *) Bugfix: nginx might be terminated abnormally while a signal processing or if the directive "timer_resolution" was used on platforms which do not support kqueue or eventport notification methods. Thanks to George Xie and Maxim Dounin. *) Bugfix: if temporary files and permanent storage area resided at different file systems, then permanent file modification times were incorrect. Thanks to Maxim Dounin. *) Bugfix: ngx_http_memcached_module might issue the error message "memcached sent invalid trailer". Thanks to Maxim Dounin. *) Bugfix: nginx could not built zlib-1.2.4 library using the library sources. Thanks to Maxim Dounin. *) Bugfix: values of the $query_string, $arg_..., etc. variables cached in main request were used by the SSI module in subrequests. *) Bugfix: nginx did not support HTTPS referrers. *) Bugfix: nginx/Windows might not find file if path in configuration was given in other character case; the bug had appeared in 0.7.65. *) Bugfix: the $date_local variable has an incorrect value, if the "%s" format was used. Thanks to Maxim Dounin. *) Bugfix: nginx did not support all ciphers and digests used in client certificates. Thanks to Innocenty Enikeew. *) Bugfix: if ssl_session_cache was not set or was set to "none", then during client certificate verify the error "session id context uninitialized" might occur; the bug had appeared in 0.7.1. *) Bugfix: OpenSSL-1.0.0 compatibility on 64-bit Linux. Thanks to Maxim Dounin. *) Bugfix: a geo range returned default value if the range included two or more /16 networks and did not begin at /16 network boundary. *) Bugfix: the $uid_got variable might not be used in the SSI and perl modules. *) Bugfix: a worker process hung if a FIFO file was requested. Thanks to Vicente Aguilar and Maxim Dounin. *) Bugfix: a variable value was repeatedly encoded after each an "echo" SSI-command output; the bug had appeared in 0.6.14. *) Bugfix: a "stub" parameter of an "include" SSI directive was not used, if empty response has 200 status code. *) Bugfix: a block used in a "stub" parameter of an "include" SSI directive was output with "text/plain" MIME type. *) Bugfix: if a proxied or FastCGI request was internally redirected to another proxied or FastCGI location, then a segmentation fault might occur in a worker process; the bug had appeared in 0.7.65. Thanks to Yichun Zhang. *) Bugfix: IMAP connections may hang until they timed out while talking to Zimbra server. Thanks to Alan Batie. *) Bugfix: nginx did not support chunked transfer encoding for 201 responses. Thanks to Julian Reich.
author Igor Sysoev <http://sysoev.ru>
date Mon, 07 Jun 2010 00:00:00 +0400
parents f7cd062ee035
children
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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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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 #include <ngx_aio.h>
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11
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12
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13 ngx_chain_t *
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14 ngx_aio_write_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
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15 {
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16 u_char *buf, *prev;
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17 off_t send, sent;
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18 size_t len;
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19 ssize_t n, size;
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20 ngx_chain_t *cl;
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22 /* the maximum limit size is the maximum size_t value - the page size */
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23
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24 if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) {
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25 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize;
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26 }
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27
0
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28 send = 0;
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29 sent = 0;
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30 cl = in;
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31
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32 while (cl) {
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33
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34 if (cl->buf->pos == cl->buf->last) {
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35 cl = cl->next;
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36 continue;
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37 }
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38
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39 /* we can post the single aio operation only */
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40
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41 if (!c->write->ready) {
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42 return cl;
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43 }
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45 buf = cl->buf->pos;
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46 prev = buf;
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47 len = 0;
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48
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49 /* coalesce the neighbouring bufs */
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51 while (cl && prev == cl->buf->pos && send < limit) {
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52 if (ngx_buf_special(cl->buf)) {
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53 continue;
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54 }
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56 size = cl->buf->last - cl->buf->pos;
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57
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58 if (send + size > limit) {
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59 size = limit - send;
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60 }
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61
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62 len += size;
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63 prev = cl->buf->pos + size;
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64 send += size;
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65 cl = cl->next;
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66 }
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67
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68 n = ngx_aio_write(c, buf, len);
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70 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_write: %z", n);
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72 if (n == NGX_ERROR) {
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73 return NGX_CHAIN_ERROR;
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74 }
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76 if (n > 0) {
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77 sent += n;
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78 c->sent += n;
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79 }
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81 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
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82 "aio_write sent: %O", c->sent);
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83
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84 for (cl = in; cl; cl = cl->next) {
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85
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86 if (sent >= cl->buf->last - cl->buf->pos) {
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87 sent -= cl->buf->last - cl->buf->pos;
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88 cl->buf->pos = cl->buf->last;
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89
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90 continue;
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91 }
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92
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93 cl->buf->pos += sent;
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94
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95 break;
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96 }
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97 }
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98
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99 return cl;
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100 }