Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_posix_init.c @ 6949:ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
The ngx_linux_sendfile() function is now used for both normal sendfile()
and sendfile in threads. The ngx_linux_sendfile_thread() function was
modified to use the same interface as ngx_linux_sendfile(), and is simply
called from ngx_linux_sendfile() when threads are enabled.
Special return code NGX_DONE is used to indicate that a thread task was
posted and no further actions are needed.
If number of bytes sent is less that what we were sending, we now always
retry sending. This is needed for sendfile() in threads as the number
of bytes we are sending might have been changed since the thread task
was posted. And this is also needed for Linux 4.3+, as sendfile() might
be interrupted at any time and provides no indication if it was interrupted
or not (ticket #1174).
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 28 Mar 2017 18:15:39 +0300 |
parents | 56fc55e32f23 |
children | 057adb2a9d23 |
rev | line source |
---|---|
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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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
539 | 10 #include <nginx.h> |
93
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11 |
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12 |
473 | 13 ngx_int_t ngx_ncpu; |
14 ngx_int_t ngx_max_sockets; | |
15 ngx_uint_t ngx_inherited_nonblocking; | |
16 ngx_uint_t ngx_tcp_nodelay_and_tcp_nopush; | |
449
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17 |
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18 |
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19 struct rlimit rlmt; |
93
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20 |
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21 |
355
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22 ngx_os_io_t ngx_os_io = { |
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23 ngx_unix_recv, |
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24 ngx_readv_chain, |
1689 | 25 ngx_udp_unix_recv, |
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26 ngx_unix_send, |
6436 | 27 ngx_udp_unix_send, |
6692 | 28 ngx_udp_unix_sendmsg_chain, |
355
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29 ngx_writev_chain, |
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30 0 |
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31 }; |
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32 |
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33 |
539 | 34 ngx_int_t |
35 ngx_os_init(ngx_log_t *log) | |
455 | 36 { |
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37 ngx_time_t *tp; |
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38 ngx_uint_t n; |
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39 |
539 | 40 #if (NGX_HAVE_OS_SPECIFIC_INIT) |
41 if (ngx_os_specific_init(log) != NGX_OK) { | |
42 return NGX_ERROR; | |
43 } | |
44 #endif | |
93
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45 |
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Added ngx_init_setproctitle() return code check.
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46 if (ngx_init_setproctitle(log) != NGX_OK) { |
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47 return NGX_ERROR; |
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48 } |
509 | 49 |
346
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50 ngx_pagesize = getpagesize(); |
589 | 51 ngx_cacheline_size = NGX_CPU_CACHE_LINE; |
346
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52 |
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53 for (n = ngx_pagesize; n >>= 1; ngx_pagesize_shift++) { /* void */ } |
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54 |
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Added ngx_ncpu detection for most *nix platforms.
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55 #if (NGX_HAVE_SC_NPROCESSORS_ONLN) |
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56 if (ngx_ncpu == 0) { |
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57 ngx_ncpu = sysconf(_SC_NPROCESSORS_ONLN); |
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58 } |
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59 #endif |
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60 |
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61 if (ngx_ncpu < 1) { |
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62 ngx_ncpu = 1; |
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63 } |
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64 |
611 | 65 ngx_cpuinfo(); |
66 | |
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67 if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) { |
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68 ngx_log_error(NGX_LOG_ALERT, log, errno, |
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69 "getrlimit(RLIMIT_NOFILE) failed"); |
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70 return NGX_ERROR; |
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71 } |
577 | 72 |
563 | 73 ngx_max_sockets = (ngx_int_t) rlmt.rlim_cur; |
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74 |
3786 | 75 #if (NGX_HAVE_INHERITED_NONBLOCK || NGX_HAVE_ACCEPT4) |
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76 ngx_inherited_nonblocking = 1; |
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77 #else |
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78 ngx_inherited_nonblocking = 0; |
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79 #endif |
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80 |
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81 tp = ngx_timeofday(); |
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82 srandom(((unsigned) ngx_pid << 16) ^ tp->sec ^ tp->msec); |
800 | 83 |
93
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84 return NGX_OK; |
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85 } |
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86 |
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87 |
539 | 88 void |
89 ngx_os_status(ngx_log_t *log) | |
449
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90 { |
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91 ngx_log_error(NGX_LOG_NOTICE, log, 0, NGINX_VER_BUILD); |
541 | 92 |
557 | 93 #ifdef NGX_COMPILER |
94 ngx_log_error(NGX_LOG_NOTICE, log, 0, "built by " NGX_COMPILER); | |
95 #endif | |
96 | |
539 | 97 #if (NGX_HAVE_OS_SPECIFIC_INIT) |
98 ngx_os_specific_status(log); | |
99 #endif | |
100 | |
531 | 101 ngx_log_error(NGX_LOG_NOTICE, log, 0, |
461 | 102 "getrlimit(RLIMIT_NOFILE): %r:%r", |
449
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103 rlmt.rlim_cur, rlmt.rlim_max); |
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104 } |
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105 |
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106 |
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107 #if 0 |
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108 |
539 | 109 ngx_int_t |
110 ngx_posix_post_conf_init(ngx_log_t *log) | |
93
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111 { |
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112 ngx_fd_t pp[2]; |
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113 |
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114 if (pipe(pp) == -1) { |
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115 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "pipe() failed"); |
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116 return NGX_ERROR; |
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117 } |
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118 |
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119 if (dup2(pp[1], STDERR_FILENO) == -1) { |
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120 ngx_log_error(NGX_LOG_EMERG, log, errno, "dup2(STDERR) failed"); |
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121 return NGX_ERROR; |
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122 } |
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123 |
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124 if (pp[1] > STDERR_FILENO) { |
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125 if (close(pp[1]) == -1) { |
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126 ngx_log_error(NGX_LOG_EMERG, log, errno, "close() failed"); |
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127 return NGX_ERROR; |
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128 } |
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129 } |
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130 |
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131 return NGX_OK; |
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132 } |
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133 |
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134 #endif |