Mercurial > dovecot > core-2.2

annotate src/indexer/indexer.c @ 13206:513ec6bf3fab

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indexer: Deinitialize without crashing when there are requests.
author Timo Sirainen <tss@iki.fi>
date Wed, 10 Aug 2011 15:17:12 +0300
parents 8dcb7c7f66d5
children 221d159befec
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
13084
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1 /* Copyright (c) 2011 Dovecot authors, see the included COPYING file */
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2
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3 #include "lib.h"
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4 #include "restrict-access.h"
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5 #include "process-title.h"
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6 #include "master-service.h"
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7 #include "master-service-settings.h"
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8 #include "indexer-client.h"
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9 #include "indexer-queue.h"
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10 #include "worker-pool.h"
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11 #include "worker-connection.h"
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12
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13 struct worker_request {
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14 struct worker_connection *conn;
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15 struct indexer_request *request;
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16 };
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17
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18 static const struct master_service_settings *set;
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19 static struct indexer_queue *queue;
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20 static struct worker_pool *worker_pool;
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21
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22 void indexer_refresh_proctitle(void)
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23 {
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24 if (!set->verbose_proctitle)
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25 return;
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26
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27 process_title_set(t_strdup_printf("[%u clients, %u requests]",
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28 indexer_clients_get_count(),
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29 indexer_queue_count(queue)));
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30 }
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31
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32 static bool idle_die(void)
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33 {
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34 return indexer_queue_is_empty(queue);
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35 }
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36
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37 static void client_connected(struct master_service_connection *conn)
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38 {
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39 master_service_client_connection_accept(conn);
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40 (void)indexer_client_create(conn->fd, queue);
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41 }
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42
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43 static void worker_send_request(struct worker_connection *conn,
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44 struct indexer_request *request)
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45 {
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46 struct worker_request *wrequest;
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47
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48 wrequest = i_new(struct worker_request, 1);
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49 wrequest->conn = conn;
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50 wrequest->request = request;
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51
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52 worker_connection_request(conn, request->username,
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53 request->mailbox, request->max_recent_msgs,
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54 wrequest);
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55 }
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56
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57 static void queue_handle_existing_user_requests(struct indexer_queue *queue)
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58 {
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59 struct worker_connection *conn;
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60 struct indexer_request *request;
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61
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62 while ((request = indexer_queue_request_peek(queue)) != NULL) {
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63 conn = worker_pool_find_username_connection(worker_pool,
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64 request->username);
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65 if (conn == NULL)
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66 break;
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67
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68 indexer_queue_request_remove(queue);
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69 /* there is already a worker handling this user.
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70 it must be the one doing the indexing. */
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71 worker_send_request(conn, request);
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72 }
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73 }
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74
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75 static void queue_try_send_more(struct indexer_queue *queue)
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76 {
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77 struct worker_connection *conn;
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78 struct indexer_request *request;
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79
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80 queue_handle_existing_user_requests(queue);
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81
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82 request = indexer_queue_request_peek(queue);
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83 if (request == NULL)
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84 return;
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85
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86 /* okay, we have a request for a new user. */
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87 if (!worker_pool_get_connection(worker_pool, &conn))
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88 return;
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89
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90 indexer_queue_request_remove(queue);
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91 worker_send_request(conn, request);
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92 }
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93
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94 static void queue_listen_callback(struct indexer_queue *queue)
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95 {
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96 queue_try_send_more(queue);
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97 }
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98
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99 static void worker_status_callback(int percentage, void *context)
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100 {
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101 struct worker_request *request = context;
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102
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103 if (percentage >= 0 && percentage < 100) {
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104 indexer_queue_request_status(queue, request->request,
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105 percentage);
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106 return;
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107 }
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108
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109 indexer_queue_request_finish(queue, &request->request,
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110 percentage == 100);
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111 if (worker_pool != NULL) /* not in deinit */
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112 worker_pool_release_connection(worker_pool, request->conn);
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113 i_free(request);
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114
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115 /* if this was the last request for the connection, we can send more
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116 through it */
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117 queue_try_send_more(queue);
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118 }
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119
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120 int main(int argc, char *argv[])
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121 {
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122 const char *error;
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123
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124 master_service = master_service_init("indexer", 0, &argc, &argv, NULL);
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125 if (master_getopt(master_service) > 0)
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126 return FATAL_DEFAULT;
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127
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128 if (master_service_settings_read_simple(master_service, NULL,
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129 &error) < 0)
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130 i_fatal("Error reading configuration: %s", error);
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131 set = master_service_settings_get(master_service);
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132
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133 master_service_init_log(master_service, "indexer: ");
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134 restrict_access_by_env(NULL, FALSE);
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135 restrict_access_allow_coredumps(TRUE);
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136 master_service_set_idle_die_callback(master_service, idle_die);
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137
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138 master_service_init_finish(master_service);
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139 queue = indexer_queue_init(indexer_client_status_callback);
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140 indexer_queue_set_listen_callback(queue, queue_listen_callback);
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141 worker_pool = worker_pool_init("indexer-worker",
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142 worker_status_callback);
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143
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144 master_service_run(master_service, client_connected);
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145
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146 indexer_queue_cancel_all(queue);
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147 indexer_clients_destroy_all();
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148 worker_pool_deinit(&worker_pool);
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149 indexer_queue_deinit(&queue);
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150
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151 master_service_deinit(&master_service);
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152 return 0;
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153 }