annotate src/os/unix/ngx_aio_write.c @ 34:aab2ea7c0458 NGINX_0_1_17

nginx 0.1.17 *) Change: the ngx_http_rewrite_module was rewritten from the scratch. Now it is possible to redirect, to return the error codes, to check the variables and referrers. The directives can be used inside locations. The redirect directive was canceled. *) Feature: the ngx_http_geo_module. *) Feature: the proxy_set_x_var and fastcgi_set_var directives. *) Bugfix: the location configuration with "=" modifier may be used in another location. *) Bugfix: the correct content type was set only for requests that use small caps letters in extension. *) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the location, and access was denied, and the error was redirected to a static page, then the segmentation fault occurred. *) Bugfix: if in a proxied "Location" header was a relative URL, then a host name and a slash were added to them; bug appeared in 0.1.14. *) Bugfix: the system error message was not logged on Linux.
author Igor Sysoev <http://sysoev.ru>
date Thu, 03 Feb 2005 00:00:00 +0300
parents 6f8b0dc0f8dd
children df17fbafec8f
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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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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 #include <ngx_aio.h>
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11
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12 #if (NGX_HAVE_KQUEUE)
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13 #include <ngx_kqueue_module.h>
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14 #endif
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15
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17 /*
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18 * the ready data requires 3 syscalls:
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19 * aio_write(), aio_error(), aio_return()
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20 * the non-ready data requires 4 (kqueue) or 5 syscalls:
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21 * aio_write(), aio_error(), notifiction, aio_error(), aio_return()
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22 * timeout, aio_cancel(), aio_error()
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23 */
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24
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25 ssize_t ngx_aio_write(ngx_connection_t *c, u_char *buf, size_t size)
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26 {
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27 int n;
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28 ngx_event_t *wev;
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29
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30 wev = c->write;
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31
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32 if (!wev->ready) {
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33 return NGX_AGAIN;
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34 }
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35
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36 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0,
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37 "aio: wev->complete: %d", wev->complete);
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38
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39 if (!wev->complete) {
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40 ngx_memzero(&wev->aiocb, sizeof(struct aiocb));
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41
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42 wev->aiocb.aio_fildes = c->fd;
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43 wev->aiocb.aio_buf = buf;
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44 wev->aiocb.aio_nbytes = size;
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45
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46 #if (NGX_HAVE_KQUEUE)
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47 wev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue;
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48 wev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
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49 wev->aiocb.aio_sigevent.sigev_value.sigval_ptr = wev;
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50 #endif
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51
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52 if (aio_write(&wev->aiocb) == -1) {
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53 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno,
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54 "aio_write() failed");
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55 return NGX_ERROR;
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56 }
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57
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58 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: OK");
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59
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60 wev->active = 1;
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61 wev->ready = 0;
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62 }
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63
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64 wev->complete = 0;
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65
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66 n = aio_error(&wev->aiocb);
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67 if (n == -1) {
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68 ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno, "aio_error() failed");
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69 wev->error = 1;
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70 return NGX_ERROR;
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71 }
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72
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73 if (n != 0) {
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74 if (n == NGX_EINPROGRESS) {
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75 if (wev->ready) {
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76 ngx_log_error(NGX_LOG_ALERT, wev->log, n,
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77 "aio_write() still in progress");
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78 wev->ready = 0;
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79 }
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80 return NGX_AGAIN;
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81 }
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82
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83 ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_write() failed");
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84 wev->error = 1;
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85 wev->ready = 0;
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86
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87 #if 1
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88 n = aio_return(&wev->aiocb);
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89 if (n == -1) {
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90 ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno,
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91 "aio_return() failed");
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92 }
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93
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94 ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_return() %d", n);
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95 #endif
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96
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97 return NGX_ERROR;
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98 }
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99
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100 n = aio_return(&wev->aiocb);
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101 if (n == -1) {
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102 ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno,
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103 "aio_return() failed");
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104
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105 wev->error = 1;
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106 wev->ready = 0;
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107 return NGX_ERROR;
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108 }
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109
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110
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111 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: %d", n);
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112
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113 wev->active = 0;
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114 wev->ready = 1;
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115
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116 return n;
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117 }