Mercurial > hg > nginx
annotate src/os/unix/ngx_channel.c @ 2631:73571521c2eb
add debug logging
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 01 Apr 2009 13:01:50 +0000 |
parents | d880fa02fb65 |
children | 2c5e269d0608 |
rev | line source |
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441
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nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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5 |
366
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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_channel.h> |
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10 |
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11 |
543 | 12 ngx_int_t |
13 ngx_write_channel(ngx_socket_t s, ngx_channel_t *ch, size_t size, | |
577 | 14 ngx_log_t *log) |
366
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15 { |
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16 ssize_t n; |
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17 ngx_err_t err; |
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18 struct iovec iov[1]; |
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19 struct msghdr msg; |
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20 |
469 | 21 #if (NGX_HAVE_MSGHDR_MSG_CONTROL) |
366
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22 |
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23 union { |
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24 struct cmsghdr cm; |
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25 char space[CMSG_SPACE(sizeof(int))]; |
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26 } cmsg; |
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27 |
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28 if (ch->fd == -1) { |
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29 msg.msg_control = NULL; |
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30 msg.msg_controllen = 0; |
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31 |
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32 } else { |
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33 msg.msg_control = (caddr_t) &cmsg; |
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34 msg.msg_controllen = sizeof(cmsg); |
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35 |
1901
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use CMSG_LEN(), this fixes an alert "sendmsg() failed (9: Bad file descriptor)"
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36 cmsg.cm.cmsg_len = CMSG_LEN(sizeof(int)); |
577 | 37 cmsg.cm.cmsg_level = SOL_SOCKET; |
366
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38 cmsg.cm.cmsg_type = SCM_RIGHTS; |
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39 *(int *) CMSG_DATA(&cmsg.cm) = ch->fd; |
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40 } |
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41 |
483 | 42 msg.msg_flags = 0; |
43 | |
366
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44 #else |
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45 |
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46 if (ch->fd == -1) { |
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47 msg.msg_accrights = NULL; |
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48 msg.msg_accrightslen = 0; |
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49 |
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50 } else { |
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51 msg.msg_accrights = (caddr_t) &ch->fd; |
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52 msg.msg_accrightslen = sizeof(int); |
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53 } |
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54 |
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55 #endif |
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56 |
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57 iov[0].iov_base = (char *) ch; |
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58 iov[0].iov_len = size; |
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59 |
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60 msg.msg_name = NULL; |
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61 msg.msg_namelen = 0; |
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62 msg.msg_iov = iov; |
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63 msg.msg_iovlen = 1; |
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64 |
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65 n = sendmsg(s, &msg, 0); |
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66 |
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67 if (n == -1) { |
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68 err = ngx_errno; |
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69 if (err == NGX_EAGAIN) { |
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70 return NGX_AGAIN; |
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71 } |
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72 |
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73 ngx_log_error(NGX_LOG_ALERT, log, err, "sendmsg() failed"); |
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74 return NGX_ERROR; |
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75 } |
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76 |
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77 return NGX_OK; |
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78 } |
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79 |
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80 |
543 | 81 ngx_int_t |
82 ngx_read_channel(ngx_socket_t s, ngx_channel_t *ch, size_t size, ngx_log_t *log) | |
577 | 83 { |
366
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84 ssize_t n; |
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85 ngx_err_t err; |
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86 struct iovec iov[1]; |
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87 struct msghdr msg; |
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88 |
469 | 89 #if (NGX_HAVE_MSGHDR_MSG_CONTROL) |
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90 union { |
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91 struct cmsghdr cm; |
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92 char space[CMSG_SPACE(sizeof(int))]; |
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93 } cmsg; |
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94 #else |
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95 int fd; |
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96 #endif |
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97 |
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98 iov[0].iov_base = (char *) ch; |
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99 iov[0].iov_len = size; |
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100 |
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101 msg.msg_name = NULL; |
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102 msg.msg_namelen = 0; |
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103 msg.msg_iov = iov; |
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104 msg.msg_iovlen = 1; |
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105 |
469 | 106 #if (NGX_HAVE_MSGHDR_MSG_CONTROL) |
366
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107 msg.msg_control = (caddr_t) &cmsg; |
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108 msg.msg_controllen = sizeof(cmsg); |
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109 #else |
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110 msg.msg_accrights = (caddr_t) &fd; |
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111 msg.msg_accrightslen = sizeof(int); |
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112 #endif |
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113 |
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114 n = recvmsg(s, &msg, 0); |
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115 |
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116 if (n == -1) { |
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117 err = ngx_errno; |
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changeset
|
118 if (err == NGX_EAGAIN) { |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
119 return NGX_AGAIN; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
120 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
121 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
122 ngx_log_error(NGX_LOG_ALERT, log, err, "recvmsg() failed"); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
123 return NGX_ERROR; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
124 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
125 |
461 | 126 if (n == 0) { |
127 ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "recvmsg() returned zero"); | |
128 return NGX_ERROR; | |
129 } | |
130 | |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
131 if ((size_t) n < sizeof(ngx_channel_t)) { |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
132 ngx_log_error(NGX_LOG_ALERT, log, 0, |
461 | 133 "recvmsg() returned not enough data: %uz", n); |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
134 return NGX_ERROR; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
135 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
136 |
469 | 137 #if (NGX_HAVE_MSGHDR_MSG_CONTROL) |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
138 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
139 if (ch->command == NGX_CMD_OPEN_CHANNEL) { |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
140 |
1901
d880fa02fb65
use CMSG_LEN(), this fixes an alert "sendmsg() failed (9: Bad file descriptor)"
Igor Sysoev <igor@sysoev.ru>
parents:
577
diff
changeset
|
141 if (cmsg.cm.cmsg_len < (socklen_t) CMSG_LEN(sizeof(int))) { |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
142 ngx_log_error(NGX_LOG_ALERT, log, 0, |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
143 "recvmsg() returned too small ancillary data"); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
144 return NGX_ERROR; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
145 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
146 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
147 if (cmsg.cm.cmsg_level != SOL_SOCKET || cmsg.cm.cmsg_type != SCM_RIGHTS) |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
148 { |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
149 ngx_log_error(NGX_LOG_ALERT, log, 0, |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
150 "recvmsg() returned invalid ancillary data " |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
151 "level %d or type %d", |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
152 cmsg.cm.cmsg_level, cmsg.cm.cmsg_type); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
153 return NGX_ERROR; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
154 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
155 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
156 ch->fd = *(int *) CMSG_DATA(&cmsg.cm); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
157 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
158 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
159 if (msg.msg_flags & (MSG_TRUNC|MSG_CTRUNC)) { |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
160 ngx_log_error(NGX_LOG_ALERT, log, 0, |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
161 "recvmsg() truncated data"); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
162 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
163 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
164 #else |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
165 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
166 if (ch->command == NGX_CMD_OPEN_CHANNEL) { |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
167 if (msg.msg_accrightslen != sizeof(int)) { |
577 | 168 ngx_log_error(NGX_LOG_ALERT, log, 0, |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
169 "recvmsg() returned no ancillary data"); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
170 return NGX_ERROR; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
171 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
172 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
173 ch->fd = fd; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
174 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
175 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
176 #endif |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
177 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
178 return n; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
179 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
180 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
181 |
543 | 182 ngx_int_t |
183 ngx_add_channel_event(ngx_cycle_t *cycle, ngx_fd_t fd, ngx_int_t event, | |
184 ngx_event_handler_pt handler) | |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
185 { |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
186 ngx_event_t *ev, *rev, *wev; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
187 ngx_connection_t *c; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
188 |
543 | 189 c = ngx_get_connection(fd, cycle->log); |
190 | |
191 if (c == NULL) { | |
192 return NGX_ERROR; | |
193 } | |
194 | |
561 | 195 c->pool = cycle->pool; |
196 | |
543 | 197 rev = c->read; |
198 wev = c->write; | |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
199 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
200 rev->log = cycle->log; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
201 wev->log = cycle->log; |
543 | 202 |
381
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
203 #if (NGX_THREADS) |
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
204 rev->lock = &c->lock; |
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
205 wev->lock = &c->lock; |
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
206 rev->own_lock = &c->lock; |
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
207 wev->own_lock = &c->lock; |
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
208 #endif |
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
209 |
563 | 210 rev->channel = 1; |
211 wev->channel = 1; | |
212 | |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
213 ev = (event == NGX_READ_EVENT) ? rev : wev; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
214 |
509 | 215 ev->handler = handler; |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
216 |
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
217 if (ngx_add_conn && (ngx_event_flags & NGX_USE_EPOLL_EVENT) == 0) { |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
218 if (ngx_add_conn(c) == NGX_ERROR) { |
543 | 219 ngx_free_connection(c); |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
220 return NGX_ERROR; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
221 } |
577 | 222 |
223 } else { | |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
224 if (ngx_add_event(ev, event, 0) == NGX_ERROR) { |
543 | 225 ngx_free_connection(c); |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
226 return NGX_ERROR; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
227 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
228 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
229 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
230 return NGX_OK; |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
231 } |
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
232 |
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
233 |
543 | 234 void |
235 ngx_close_channel(ngx_fd_t *fd, ngx_log_t *log) | |
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
236 { |
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
237 if (close(fd[0]) == -1) { |
465 | 238 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() channel failed"); |
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
239 } |
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
240 |
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
241 if (close(fd[1]) == -1) { |
465 | 242 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() channel failed"); |
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
243 } |
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
381
diff
changeset
|
244 } |