Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/master/login-process.c @ 1237:9b693201e075 HEAD

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..and tell login process about verbose_ssl..
author Timo Sirainen <tss@iki.fi>
date Sun, 23 Feb 2003 21:49:20 +0200
parents 5c9c681f13ff
children 2cf2e08a6ee9
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1 /* Copyright (C) 2002 Timo Sirainen */
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2
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3 #include "common.h"
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4 #include "ioloop.h"
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5 #include "network.h"
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6 #include "ostream.h"
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7 #include "fdpass.h"
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8 #include "fd-close-on-exec.h"
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9 #include "env-util.h"
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10 #include "restrict-access.h"
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11 #include "restrict-process-size.h"
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12 #include "login-process.h"
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13 #include "auth-process.h"
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14 #include "mail-process.h"
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15 #include "master-login-interface.h"
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16
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17 #include <unistd.h>
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18 #include <syslog.h>
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19
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20 struct login_group {
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21 struct login_group *next;
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22
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23 struct login_settings *set;
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24
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25 unsigned int processes;
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26 unsigned int listening_processes;
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27 unsigned int wanted_processes_count;
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28
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29 struct login_process *oldest_nonlisten_process;
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30 struct login_process *newest_nonlisten_process;
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31
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32 const char *executable;
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33 unsigned int process_size;
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34 int *listen_fd, *ssl_listen_fd;
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35 };
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36
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37 struct login_process {
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38 struct login_group *group;
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39 struct login_process *prev_nonlisten, *next_nonlisten;
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40 int refcount;
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41
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42 pid_t pid;
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43 int fd;
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44 struct io *io;
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45 struct ostream *output;
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46 unsigned int initialized:1;
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47 unsigned int listening:1;
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48 unsigned int destroyed:1;
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49 };
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50
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51 struct login_auth_request {
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52 struct login_process *process;
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53 unsigned int tag;
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54
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55 unsigned int login_tag;
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56 int fd;
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57
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58 struct ip_addr ip;
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59 };
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60
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61 static unsigned int auth_id_counter;
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62 static struct timeout *to;
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63
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64 static struct hash_table *processes;
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65 static struct login_group *login_groups;
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66
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67 static void login_process_destroy(struct login_process *p);
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68 static void login_process_unref(struct login_process *p);
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69
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70 static void login_group_create(struct login_settings *login_set)
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71 {
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72 struct login_group *group;
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73
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74 if (strstr(set->protocols, login_set->name) == NULL) {
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75 /* not enabled */
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76 return;
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77 }
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78
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79 group = i_new(struct login_group, 1);
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80 group->set = login_set;
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81
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82 if (strcmp(login_set->name, "imap") == 0) {
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83 group->executable = set->imap_executable;
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84 group->process_size = set->imap_process_size;
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85 group->listen_fd = &mail_fd[FD_IMAP];
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86 group->ssl_listen_fd = &mail_fd[FD_IMAPS];
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87 } else if (strcmp(login_set->name, "pop3") == 0) {
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88 group->executable = set->pop3_executable;
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89 group->process_size = set->pop3_process_size;
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90 group->listen_fd = &mail_fd[FD_POP3];
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91 group->ssl_listen_fd = &mail_fd[FD_POP3S];
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92 } else
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93 i_panic("Unknown login group name '%s'", login_set->name);
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94
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95 group->next = login_groups;
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96 login_groups = group;
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97 }
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98
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99 static void login_group_destroy(struct login_group *group)
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100 {
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101 i_free(group);
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102 }
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103
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104 void auth_master_callback(struct auth_master_reply *reply,
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105 const unsigned char *data, void *context)
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106 {
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107 struct login_auth_request *request = context;
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108 struct master_login_reply master_reply;
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109
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110 if (reply == NULL || !reply->success)
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111 master_reply.success = FALSE;
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112 else {
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113 struct login_group *group = request->process->group;
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114
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115 master_reply.success =
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116 create_mail_process(request->fd, &request->ip,
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117 group->executable,
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118 group->process_size,
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119 reply, (const char *) data);
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120 }
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121
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122 /* reply to login */
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123 master_reply.tag = request->login_tag;
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124
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125 if (o_stream_send(request->process->output, &master_reply,
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126 sizeof(master_reply)) < 0)
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127 login_process_destroy(request->process);
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128
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129 if (close(request->fd) < 0)
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130 i_error("close(mail client) failed: %m");
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131 login_process_unref(request->process);
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132 i_free(request);
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133 }
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134
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135 static void login_process_mark_nonlistening(struct login_process *p)
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136 {
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137 if (!p->listening) {
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138 i_error("login: received another \"not listening\" "
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139 "notification");
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140 return;
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141 }
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142
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143 p->listening = FALSE;
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144 p->group->listening_processes--;
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145
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146 p->prev_nonlisten = p->group->newest_nonlisten_process;
614
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147
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148 if (p->group->newest_nonlisten_process != NULL)
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149 p->group->newest_nonlisten_process->next_nonlisten = p;
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150 p->group->newest_nonlisten_process = p;
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151
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152 if (p->group->oldest_nonlisten_process == NULL)
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153 p->group->oldest_nonlisten_process = p;
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154 }
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155
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156 static void login_process_input(void *context)
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157 {
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158 struct login_process *p = context;
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159 struct auth_process *auth_process;
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160 struct login_auth_request *authreq;
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161 struct master_login_request req;
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162 int client_fd, ret;
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163
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164 ret = fd_read(p->fd, &req, sizeof(req), &client_fd);
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165 if (ret != sizeof(req)) {
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166 if (ret == 0) {
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167 /* disconnected, ie. the login process died */
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168 } else if (ret > 0) {
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169 /* req wasn't fully read */
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170 i_error("login: fd_read() couldn't read all req");
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171 } else {
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172 i_error("login: fd_read() failed: %m");
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173 }
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174
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175 if (client_fd != -1) {
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176 if (close(client_fd) < 0)
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177 i_error("close(mail client) failed: %m");
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178 }
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179
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180 login_process_destroy(p);
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181 return;
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182 }
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183
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184 if (client_fd == -1) {
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2e649dec0f09 Auth and login processes send an "we're ok" reply at the end of
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185 /* just a notification that the login process */
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186 if (!p->initialized) {
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187 /* initialization notify */
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188 p->initialized = TRUE;;
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189 } else {
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190 /* not listening for new connections anymore */
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191 login_process_mark_nonlistening(p);
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192 }
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193 return;
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194 }
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195
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196 fd_close_on_exec(client_fd, TRUE);
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197
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198 /* ask the cookie from the auth process */
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199 authreq = i_new(struct login_auth_request, 1);
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200 p->refcount++;
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201 authreq->process = p;
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202 authreq->tag = ++auth_id_counter;
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203 authreq->login_tag = req.tag;
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204 authreq->fd = client_fd;
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205 authreq->ip = req.ip;
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206
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207 auth_process = auth_process_find(req.auth_pid);
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208 if (auth_process == NULL) {
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209 i_error("login: Authentication process %u doesn't exist",
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210 req.auth_pid);
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211 auth_master_callback(NULL, NULL, authreq);
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212 } else {
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diff changeset
213 auth_process_request(auth_process, p->pid,
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214 req.auth_id, authreq);
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215 }
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216 }
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217
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218 static struct login_process *
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219 login_process_new(struct login_group *group, pid_t pid, int fd)
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220 {
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221 struct login_process *p;
0
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222
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223 PID_ADD_PROCESS_TYPE(pid, PROCESS_TYPE_LOGIN);
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224
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225 p = i_new(struct login_process, 1);
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226 p->group = group;
0
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227 p->refcount = 1;
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228 p->pid = pid;
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229 p->fd = fd;
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230 p->listening = TRUE;
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231 p->io = io_add(fd, IO_READ, login_process_input, p);
764
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232 p->output = o_stream_create_file(fd, default_pool,
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diff changeset
233 sizeof(struct master_login_reply)*10,
410
1f0e7229ee58 Split IOBuffer into mmaped IBuffer, file IBuffer, memory data IBuffer and
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diff changeset
234 IO_PRIORITY_DEFAULT, FALSE);
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235
195
db6e288be0e9 Replaced INT_TO_POINTER and POINTER_TO_INT macros with POINTER_CAST and
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diff changeset
236 hash_insert(processes, POINTER_CAST(pid), p);
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diff changeset
237 p->group->processes++;
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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238 p->group->listening_processes++;
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239 return p;
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240 }
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241
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242 static void login_process_remove_from_lists(struct login_process *p)
613
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243 {
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244 if (p == p->group->oldest_nonlisten_process)
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245 p->group->oldest_nonlisten_process = p->next_nonlisten;
613
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diff changeset
246 else
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diff changeset
247 p->prev_nonlisten->next_nonlisten = p->next_nonlisten;
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248
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diff changeset
249 if (p == p->group->newest_nonlisten_process)
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250 p->group->newest_nonlisten_process = p->prev_nonlisten;
613
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251 else
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diff changeset
252 p->next_nonlisten->prev_nonlisten = p->prev_nonlisten;
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diff changeset
253
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diff changeset
254 p->next_nonlisten = p->prev_nonlisten = NULL;
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255 }
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diff changeset
256
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257 static void login_process_destroy(struct login_process *p)
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258 {
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259 if (p->destroyed)
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260 return;
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261 p->destroyed = TRUE;
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262
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diff changeset
263 if (!p->initialized && io_loop_is_running(ioloop)) {
1000
0fbafade2d85 If auth/login process died unexpectedly, the exit status or killing signal
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diff changeset
264 i_error("Login process died too early - shutting down");
0fbafade2d85 If auth/login process died unexpectedly, the exit status or killing signal
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265 io_loop_stop(ioloop);
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266 }
613
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267 if (p->listening)
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268 p->group->listening_processes--;
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diff changeset
269
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270 o_stream_close(p->output);
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271 io_remove(p->io);
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5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several
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diff changeset
272 if (close(p->fd) < 0)
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273 i_error("close(login) failed: %m");
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274
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diff changeset
275 if (!p->listening)
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276 login_process_remove_from_lists(p);
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277
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278 p->group->processes--;
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diff changeset
279 hash_remove(processes, POINTER_CAST(p->pid));
613
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diff changeset
280
0
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281 login_process_unref(p);
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282 }
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283
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284 static void login_process_unref(struct login_process *p)
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285 {
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286 if (--p->refcount > 0)
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diff changeset
287 return;
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288
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289 o_stream_unref(p->output);
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290 i_free(p);
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291 }
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292
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293 static pid_t create_login_process(struct login_group *group)
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294 {
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295 static const char *argv[] = { NULL, NULL };
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296 pid_t pid;
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297 int fd[2];
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298
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299 if (group->set->process_per_connection &&
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300 group->processes - group->listening_processes >=
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301 group->set->max_logging_users) {
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302 if (group->oldest_nonlisten_process != NULL)
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303 login_process_destroy(group->oldest_nonlisten_process);
613
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304 }
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305
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306 if (group->set->uid == 0)
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307 i_fatal("Login process must not run as root");
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308
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309 /* create communication to process with a socket pair */
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310 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) == -1) {
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311 i_error("socketpair() failed: %m");
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312 return -1;
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313 }
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314
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315 pid = fork();
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316 if (pid < 0) {
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317 (void)close(fd[0]);
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318 (void)close(fd[1]);
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319 i_error("fork() failed: %m");
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320 return -1;
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321 }
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322
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323 if (pid != 0) {
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324 /* master */
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325 fd_close_on_exec(fd[0], TRUE);
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326 login_process_new(group, pid, fd[0]);
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327 (void)close(fd[1]);
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328 return pid;
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329 }
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330
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331 /* move communication handle */
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332 if (dup2(fd[1], LOGIN_MASTER_SOCKET_FD) < 0)
805
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several
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333 i_fatal("login: dup2(master) failed: %m");
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334 fd_close_on_exec(LOGIN_MASTER_SOCKET_FD, FALSE);
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335
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336 /* move the listen handle */
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337 if (dup2(*group->listen_fd, LOGIN_LISTEN_FD) < 0)
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338 i_fatal("login: dup2(listen_fd) failed: %m");
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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339 fd_close_on_exec(LOGIN_LISTEN_FD, FALSE);
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340
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341 /* move the SSL listen handle */
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342 if (!set->ssl_disable) {
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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343 if (dup2(*group->ssl_listen_fd, LOGIN_SSL_LISTEN_FD) < 0)
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344 i_fatal("login: dup2(ssl_listen_fd) failed: %m");
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ad8f7d2107b4 If ssl_disable is set to yes and we get SIGHUPed, don't feed the listening
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345 } else {
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346 if (dup2(null_fd, LOGIN_SSL_LISTEN_FD) < 0)
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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347 i_fatal("login: dup2(ssl_listen_fd) failed: %m");
876
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348 }
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349 fd_close_on_exec(LOGIN_SSL_LISTEN_FD, FALSE);
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350
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351 /* listen_fds are closed by clean_child_process() */
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352
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353 (void)close(fd[0]);
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354 (void)close(fd[1]);
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355
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356 clean_child_process();
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357
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358 /* setup access environment - needs to be done after
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359 clean_child_process() since it clears environment */
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diff changeset
360 restrict_access_set_env(group->set->user,
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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diff changeset
361 group->set->uid, set->login_gid,
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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diff changeset
362 set->login_chroot ? set->login_dir : NULL);
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363
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364 if (!set->login_chroot) {
0
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diff changeset
365 /* no chrooting, but still change to the directory */
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parents: 1039
diff changeset
366 if (chdir(set->login_dir) < 0)
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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diff changeset
367 i_fatal("chdir(%s) failed: %m", set->login_dir);
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368 }
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369
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diff changeset
370 if (!set->ssl_disable) {
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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diff changeset
371 env_put(t_strconcat("SSL_CERT_FILE=",
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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diff changeset
372 set->ssl_cert_file, NULL));
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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diff changeset
373 env_put(t_strconcat("SSL_KEY_FILE=", set->ssl_key_file, NULL));
697
7814b29d0862 Created env_put() and env_clean() for a bit easier handling of environment
Timo Sirainen <tss@iki.fi>
parents: 666
diff changeset
374 env_put(t_strconcat("SSL_PARAM_FILE=",
1055
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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parents: 1039
diff changeset
375 set->ssl_parameters_file, NULL));
615
0d852af6842e Master process generates DH/RSA parameters now and stores them into file
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parents: 614
diff changeset
376 }
0d852af6842e Master process generates DH/RSA parameters now and stores them into file
Timo Sirainen <tss@iki.fi>
parents: 614
diff changeset
377
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a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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parents: 1039
diff changeset
378 if (set->disable_plaintext_auth)
697
7814b29d0862 Created env_put() and env_clean() for a bit easier handling of environment
Timo Sirainen <tss@iki.fi>
parents: 666
diff changeset
379 env_put("DISABLE_PLAINTEXT_AUTH=1");
1055
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
380 if (set->verbose_proctitle)
747
db6fb0aa16d1 Let login process also know if verbose process titles are wanted..
Timo Sirainen <tss@iki.fi>
parents: 727
diff changeset
381 env_put("VERBOSE_PROCTITLE=1");
1237
9b693201e075 ..and tell login process about verbose_ssl..
Timo Sirainen <tss@iki.fi>
parents: 1119
diff changeset
382 if (set->verbose_ssl)
9b693201e075 ..and tell login process about verbose_ssl..
Timo Sirainen <tss@iki.fi>
parents: 1119
diff changeset
383 env_put("VERBOSE_SSL=1");
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diff changeset
384
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a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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parents: 1039
diff changeset
385 if (group->set->process_per_connection) {
697
7814b29d0862 Created env_put() and env_clean() for a bit easier handling of environment
Timo Sirainen <tss@iki.fi>
parents: 666
diff changeset
386 env_put("PROCESS_PER_CONNECTION=1");
7814b29d0862 Created env_put() and env_clean() for a bit easier handling of environment
Timo Sirainen <tss@iki.fi>
parents: 666
diff changeset
387 env_put("MAX_LOGGING_USERS=1");
613
1906116a62ce Finally support for handling each login connection in it's own process.
Timo Sirainen <tss@iki.fi>
parents: 596
diff changeset
388 } else {
810
30f6811f4952 Instead of just trusting randomness of authentication cookies between
Timo Sirainen <tss@iki.fi>
parents: 807
diff changeset
389 env_put(t_strdup_printf("MAX_LOGGING_USERS=%u",
1055
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
390 group->set->max_logging_users));
613
1906116a62ce Finally support for handling each login connection in it's own process.
Timo Sirainen <tss@iki.fi>
parents: 596
diff changeset
391 }
0
3b1985cbc908 Initial revision
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diff changeset
392
810
30f6811f4952 Instead of just trusting randomness of authentication cookies between
Timo Sirainen <tss@iki.fi>
parents: 807
diff changeset
393 env_put(t_strdup_printf("PROCESS_UID=%s", dec2str(getpid())));
30f6811f4952 Instead of just trusting randomness of authentication cookies between
Timo Sirainen <tss@iki.fi>
parents: 807
diff changeset
394
1065
6cb5b50aea71 Don't let login process fork()
Timo Sirainen <tss@iki.fi>
parents: 1055
diff changeset
395 restrict_process_size(group->set->process_size, 0);
722
0438621d25ff Added virtual memory size limits to processes. Default values are pretty
Timo Sirainen <tss@iki.fi>
parents: 699
diff changeset
396
801
86224ff16bf6 Drop root privileges earlier. Close syslog more later in imap-master when
Timo Sirainen <tss@iki.fi>
parents: 791
diff changeset
397 /* make sure we don't leak syslog fd, but do it last so that
86224ff16bf6 Drop root privileges earlier. Close syslog more later in imap-master when
Timo Sirainen <tss@iki.fi>
parents: 791
diff changeset
398 any errors above will be logged */
86224ff16bf6 Drop root privileges earlier. Close syslog more later in imap-master when
Timo Sirainen <tss@iki.fi>
parents: 791
diff changeset
399 closelog();
86224ff16bf6 Drop root privileges earlier. Close syslog more later in imap-master when
Timo Sirainen <tss@iki.fi>
parents: 791
diff changeset
400
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parents:
diff changeset
401 /* hide the path, it's ugly */
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a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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parents: 1039
diff changeset
402 argv[0] = strrchr(group->set->executable, '/');
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
403 if (argv[0] == NULL) argv[0] = group->set->executable; else argv[0]++;
0
3b1985cbc908 Initial revision
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parents:
diff changeset
404
1055
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
405 execv(group->set->executable, (char **) argv);
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
406
801
86224ff16bf6 Drop root privileges earlier. Close syslog more later in imap-master when
Timo Sirainen <tss@iki.fi>
parents: 791
diff changeset
407 i_fatal_status(FATAL_EXEC, "execv(%s) failed: %m", argv[0]);
0
3b1985cbc908 Initial revision
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parents:
diff changeset
408 return -1;
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
409 }
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
410
1055
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
411 void login_process_abormal_exit(pid_t pid)
615
0d852af6842e Master process generates DH/RSA parameters now and stores them into file
Timo Sirainen <tss@iki.fi>
parents: 614
diff changeset
412 {
1055
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
413 struct login_process *p;
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
414
615
0d852af6842e Master process generates DH/RSA parameters now and stores them into file
Timo Sirainen <tss@iki.fi>
parents: 614
diff changeset
415 /* don't start raising the process count if they're dying all
0d852af6842e Master process generates DH/RSA parameters now and stores them into file
Timo Sirainen <tss@iki.fi>
parents: 614
diff changeset
416 the time */
1055
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
417 p = hash_lookup(processes, POINTER_CAST(pid));
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
418 if (p != NULL)
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
419 p->group->wanted_processes_count = 0;
615
0d852af6842e Master process generates DH/RSA parameters now and stores them into file
Timo Sirainen <tss@iki.fi>
parents: 614
diff changeset
420 }
0d852af6842e Master process generates DH/RSA parameters now and stores them into file
Timo Sirainen <tss@iki.fi>
parents: 614
diff changeset
421
635
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
422 static void login_hash_destroy(void *key __attr_unused__, void *value,
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
423 void *context __attr_unused__)
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
424 {
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
425 login_process_destroy(value);
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
426 }
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
427
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
428 void login_processes_destroy_all(void)
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
429 {
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
430 hash_foreach(processes, login_hash_destroy, NULL);
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
Timo Sirainen <tss@iki.fi>
parents: 615
diff changeset
431
1055
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
Timo Sirainen <tss@iki.fi>
parents: 1039
diff changeset
432 while (login_groups != NULL) {
a72bba3f8a55 Rewrote setting handling. Changed some existing settings also since POP3
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433 struct login_group *group = login_groups;
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434
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435 login_groups = group->next;
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436 login_group_destroy(group);
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437 }
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438 }
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439
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440 static void login_group_start_missings(struct login_group *group)
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441 {
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442 if (!group->set->process_per_connection) {
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443 /* create max. one process every second, that way if it keeps
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444 dying all the time we don't eat all cpu with fork()ing. */
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445 if (group->listening_processes < group->set->processes_count)
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446 (void)create_login_process(group);
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447 return;
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448 }
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449
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450 /* we want to respond fast when multiple clients are connecting
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451 at once, but we also want to prevent fork-bombing. use the
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452 same method as apache: check once a second if we need new
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453 processes. if yes and we've used all the existing processes,
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454 double their amount (unless we've hit the high limit).
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455 Then for each second that didn't use all existing processes,
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456 drop the max. process count by one. */
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457 if (group->wanted_processes_count < group->set->processes_count)
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458 group->wanted_processes_count = group->set->processes_count;
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459 else if (group->listening_processes == 0)
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460 group->wanted_processes_count *= 2;
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461 else if (group->wanted_processes_count > group->set->processes_count)
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462 group->wanted_processes_count--;
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463
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464 if (group->wanted_processes_count > group->set->max_processes_count)
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465 group->wanted_processes_count = group->set->max_processes_count;
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466
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467 while (group->listening_processes < group->wanted_processes_count)
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468 (void)create_login_process(group);
635
90a65c017bf0 SIGHUP reloads now settings. Logged in clients are left untouched, but
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469 }
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470
903
fd8888f6f037 Naming style changes, finally got tired of most of the typedefs. Also the
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471 static void
1036
f782b3319553 Removed useless parameters from io_callback_t and timeout_callback_t.
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472 login_processes_start_missing(void *context __attr_unused__)
0
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473 {
1055
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474 struct login_group *group;
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475 struct login_settings *login;
614
e60620644af3 login_process_per_connection = yes scales now better when multiple users are
Timo Sirainen <tss@iki.fi>
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476
1055
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477 if (login_groups == NULL) {
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478 for (login = set->logins; login != NULL; login = login->next)
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479 login_group_create(login);
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480 }
614
e60620644af3 login_process_per_connection = yes scales now better when multiple users are
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481
1055
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482 for (group = login_groups; group != NULL; group = group->next)
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483 login_group_start_missings(group);
0
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484 }
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485
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486 void login_processes_init(void)
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487 {
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488 auth_id_counter = 0;
1055
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489 login_groups = NULL;
613
1906116a62ce Finally support for handling each login connection in it's own process.
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490
945
501f076f2e74 Rewrote hash table code, works with less memory now. Also some memory
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491 processes = hash_create(default_pool, default_pool, 128, NULL, NULL);
0
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492 to = timeout_add(1000, login_processes_start_missing, NULL);
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493 }
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494
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495 void login_processes_deinit(void)
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496 {
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497 timeout_remove(to);
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498
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499 login_processes_destroy_all();
0
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500 hash_destroy(processes);
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501 }