Mercurial > dovecot > core-2.2

annotate src/indexer/indexer-client.c @ 13095:268f76a75e51

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indexer: Send OK reply to client with the given tag.
author Timo Sirainen <tss@iki.fi>
date Fri, 22 Jul 2011 13:09:14 +0300
parents 0faaceb2f83c
children af8c5e56d098
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
13084
0faaceb2f83c Added "indexer" service, which uses worker processes to perform queued mailbox indexing.
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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 "llist.h"
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5 #include "istream.h"
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6 #include "ostream.h"
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7 #include "strescape.h"
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8 #include "master-service.h"
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9 #include "indexer-queue.h"
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10 #include "indexer-client.h"
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11
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12 #include <stdlib.h>
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13 #include <unistd.h>
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14
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15 #define MAX_INBUF_SIZE (1024*64)
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16
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17 #define INDEXER_CLIENT_PROTOCOL_MAJOR_VERSION 1
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18 #define INDEXER_CLIENT_PROTOCOL_MINOR_VERSION 0
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19
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20 struct indexer_client {
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21 struct indexer_client *prev, *next;
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22
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23 int refcount;
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24 struct indexer_queue *queue;
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25
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26 int fd;
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27 struct istream *input;
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28 struct ostream *output;
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29 struct io *io;
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30
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31 unsigned int version_received:1;
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32 unsigned int handshaked:1;
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33 unsigned int destroyed:1;
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34 };
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35
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36 struct indexer_client_request {
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37 struct indexer_client *client;
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38 unsigned int tag;
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39 };
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40
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41 struct indexer_client *clients = NULL;
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42
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43 static void indexer_client_destroy(struct indexer_client *client);
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44 static void indexer_client_ref(struct indexer_client *client);
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45 static void indexer_client_unref(struct indexer_client *client);
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46
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47 static const char *const*
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48 indexer_client_next_line(struct indexer_client *client)
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49 {
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50 const char *line;
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51 char **args;
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52 unsigned int i;
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53
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54 line = i_stream_next_line(client->input);
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55 if (line == NULL)
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56 return NULL;
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57
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58 args = p_strsplit(pool_datastack_create(), line, "\t");
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59 for (i = 0; args[i] != NULL; i++)
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60 args[i] = str_tabunescape(args[i]);
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61 return (void *)args;
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62 }
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63
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64 static int
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65 indexer_client_request_queue(struct indexer_client *client, bool append,
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66 const char *const *args, const char **error_r)
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67 {
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68 struct indexer_client_request *ctx = NULL;
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69 unsigned int tag;
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70
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71 if (str_array_length(args) != 3) {
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72 *error_r = "Wrong parameter count";
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73 return -1;
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74 }
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75 if (str_to_uint(args[0], &tag) < 0) {
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76 *error_r = "Invalid tag";
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77 return -1;
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78 }
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79
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80 if (tag != 0) {
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81 ctx = i_new(struct indexer_client_request, 1);
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82 ctx->client = client;
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83 ctx->tag = tag;
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84 indexer_client_ref(client);
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85 }
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86
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87 indexer_queue_append(client->queue, append, args[1], args[2], ctx);
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268f76a75e51 indexer: Send OK reply to client with the given tag.
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88 o_stream_send_str(client->output, t_strdup_printf("%u\tOK\n", tag));
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89 return 0;
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90 }
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91
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92 static int
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93 indexer_client_request(struct indexer_client *client,
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94 const char *const *args, const char **error_r)
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95 {
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96 const char *cmd = args[0];
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97
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98 args++;
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99
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100 if (strcmp(cmd, "APPEND") == 0)
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101 return indexer_client_request_queue(client, TRUE, args, error_r);
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102 else if (strcmp(cmd, "PREPEND") == 0)
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103 return indexer_client_request_queue(client, FALSE, args, error_r);
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104 else {
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105 *error_r = t_strconcat("Unknown command: ", cmd, NULL);
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106 return -1;
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107 }
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108 }
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109
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110 static void indexer_client_input(void *context)
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111 {
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112 struct indexer_client *client = context;
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113 const char *line, *const *args, *error;
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114
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115 switch (i_stream_read(client->input)) {
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116 case -2:
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117 i_error("BUG: Client connection sent too much data");
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118 indexer_client_destroy(client);
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119 return;
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120 case -1:
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121 indexer_client_destroy(client);
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122 return;
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123 }
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124
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125 if (!client->version_received) {
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126 if ((line = i_stream_next_line(client->input)) == NULL)
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127 return;
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128
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129 if (!version_string_verify(line, "indexer",
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130 INDEXER_CLIENT_PROTOCOL_MAJOR_VERSION)) {
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131 i_error("Client not compatible with this server "
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132 "(mixed old and new binaries?)");
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133 indexer_client_destroy(client);
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134 return;
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135 }
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136 client->version_received = TRUE;
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137 }
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138
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139 while ((args = indexer_client_next_line(client)) != NULL) {
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140 if (args[0] != NULL) {
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141 if (indexer_client_request(client, args, &error) < 0) {
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142 i_error("Client input error: %s", error);
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143 indexer_client_destroy(client);
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144 break;
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145 }
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146 }
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147 }
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148 }
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149
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150 void indexer_client_status_callback(int percentage, void *context)
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151 {
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152 struct indexer_client_request *ctx = context;
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153
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154 T_BEGIN {
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155 o_stream_send_str(ctx->client->output,
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156 t_strdup_printf("%u\t%d\n", ctx->tag, percentage));
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157 } T_END;
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158 if (percentage < 0 || percentage == 100) {
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159 indexer_client_unref(ctx->client);
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160 i_free(ctx);
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161 }
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162 }
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163
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164 struct indexer_client *
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165 indexer_client_create(int fd, struct indexer_queue *queue)
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166 {
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167 struct indexer_client *client;
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168
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169 client = i_new(struct indexer_client, 1);
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170 client->refcount = 1;
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171 client->queue = queue;
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172 client->fd = fd;
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173 client->input = i_stream_create_fd(fd, MAX_INBUF_SIZE, FALSE);
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174 client->output = o_stream_create_fd(fd, (size_t)-1, FALSE);
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175 client->io = io_add(fd, IO_READ, indexer_client_input, client);
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176 DLLIST_PREPEND(&clients, client);
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177 return client;
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178 }
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179
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180 static void indexer_client_destroy(struct indexer_client *client)
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181 {
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182 if (client->destroyed)
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183 return;
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184 client->destroyed = TRUE;
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185
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186 DLLIST_REMOVE(&clients, client);
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187
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188 io_remove(&client->io);
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189 i_stream_close(client->input);
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190 o_stream_close(client->output);
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191 if (close(client->fd) < 0)
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192 i_error("close(client) failed: %m");
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193 client->fd = -1;
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194 indexer_client_unref(client);
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195
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196 master_service_client_connection_destroyed(master_service);
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197 }
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198
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199 static void indexer_client_ref(struct indexer_client *client)
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200 {
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201 i_assert(client->refcount > 0);
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202
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203 client->refcount++;
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204 }
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205
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206 static void indexer_client_unref(struct indexer_client *client)
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207 {
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208 i_assert(client->refcount > 0);
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209
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210 if (--client->refcount > 0)
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211 return;
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212 i_stream_destroy(&client->input);
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213 o_stream_destroy(&client->output);
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214 i_free(client);
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215 }
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216
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217 void indexer_clients_destroy_all(void)
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218 {
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219 while (clients != NULL)
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220 indexer_client_destroy(clients);
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221 }