1 | /* |
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2 | * Copyright (C) 2020-2021 Soleta Networks <info@soleta.eu> |
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3 | * |
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4 | * This program is free software: you can redistribute it and/or modify it under |
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5 | * the terms of the GNU Affero General Public License as published by the |
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6 | * Free Software Foundation; either version 3 of the License, or |
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7 | * (at your option) any later version. |
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8 | */ |
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9 | |
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10 | #include <syslog.h> |
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11 | #include <netinet/in.h> |
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12 | #include <arpa/inet.h> |
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13 | #include <string.h> |
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14 | #include "dbi.h" |
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15 | #include "cfg.h" |
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16 | #include <syslog.h> |
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17 | #include <string.h> |
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18 | #include <stdio.h> |
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19 | |
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20 | #define OG_SCHEMA_STMTS_V2 7 |
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21 | |
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22 | static const char *stmts_v2[OG_SCHEMA_STMTS_V2] = { |
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23 | [0] = "ALTER TABLE `aulas` " |
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24 | "ADD CONSTRAINT FK_centros " |
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25 | "FOREIGN KEY (`idcentro`) " |
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26 | "REFERENCES `centros` (`idcentro`) ON DELETE CASCADE", |
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27 | [1] = "ALTER TABLE `ordenadores` " |
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28 | "ADD CONSTRAINT FK_aulas " |
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29 | "FOREIGN KEY (`idaula`) " |
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30 | "REFERENCES `aulas` (`idaula`) ON DELETE CASCADE", |
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31 | [2] = "ALTER TABLE `ordenadores_particiones` " |
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32 | "ADD CONSTRAINT FK_ordenadores " |
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33 | "FOREIGN KEY (`idordenador`) " |
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34 | "REFERENCES `ordenadores` (`idordenador`) ON DELETE CASCADE", |
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35 | [3] = "DELETE PS FROM perfilessoft_softwares AS PS " |
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36 | "WHERE NOT EXISTS (" |
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37 | "SELECT null FROM softwares AS S " |
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38 | "WHERE S.idsoftware = PS.idsoftware)", |
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39 | [4] = "ALTER TABLE `perfilessoft_softwares` " |
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40 | "ADD CONSTRAINT FK_softwares " |
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41 | "FOREIGN KEY (`idsoftware`) " |
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42 | "REFERENCES `softwares` (`idsoftware`) ON DELETE CASCADE", |
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43 | [5] = "ALTER TABLE `perfilessoft_softwares` " |
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44 | "ADD CONSTRAINT FK_perfilessoft " |
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45 | "FOREIGN KEY (`idperfilsoft`) " |
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46 | "REFERENCES `perfilessoft` (`idperfilsoft`) ON DELETE CASCADE", |
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47 | [6] = "UPDATE version SET version = 2", |
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48 | }; |
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49 | |
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50 | static int og_dbi_create_version(struct og_dbi *dbi) |
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51 | { |
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52 | const char *msglog; |
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53 | dbi_result result; |
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54 | |
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55 | result = dbi_conn_queryf(dbi->conn, "CREATE TABLE `version` " |
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56 | "(`version` smallint unsigned NOT NULL) " |
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57 | "ENGINE='MyISAM' COLLATE 'utf8_general_ci'"); |
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58 | if (!result) { |
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59 | dbi_conn_error(dbi->conn, &msglog); |
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60 | syslog(LOG_INFO, "Could not create schema version table (%s:%d) %s\n", |
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61 | __func__, __LINE__, msglog); |
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62 | return -1; |
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63 | } |
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64 | dbi_result_free(result); |
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65 | |
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66 | result = dbi_conn_queryf(dbi->conn, "INSERT INTO `version` (`version`) VALUES ('0')"); |
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67 | if (!result) { |
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68 | dbi_conn_error(dbi->conn, &msglog); |
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69 | syslog(LOG_INFO, "Could not insert into schema version table (%s:%d) %s\n", |
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70 | __func__, __LINE__, msglog); |
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71 | return -1; |
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72 | } |
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73 | dbi_result_free(result); |
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74 | |
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75 | return 0; |
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76 | } |
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77 | static int og_dbi_schema_version(struct og_dbi *dbi) |
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78 | { |
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79 | const char *msglog; |
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80 | dbi_result result; |
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81 | uint32_t version; |
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82 | |
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83 | result = dbi_conn_queryf(dbi->conn, "SELECT * from version"); |
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84 | if (!result) { |
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85 | dbi_conn_error(dbi->conn, &msglog); |
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86 | syslog(LOG_INFO, "no version table found (%s:%d) %s\n", |
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87 | __func__, __LINE__, msglog); |
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88 | return -1; |
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89 | } |
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90 | |
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91 | if (!dbi_result_last_row(result)) { |
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92 | dbi_conn_error(dbi->conn, &msglog); |
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93 | syslog(LOG_ERR, "cannot get last row from version table (%s:%d) %s\n", |
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94 | __func__, __LINE__, msglog); |
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95 | return -1; |
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96 | } |
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97 | |
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98 | version = dbi_result_get_uint(result, "version"); |
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99 | |
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100 | dbi_result_free(result); |
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101 | |
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102 | return version; |
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103 | } |
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104 | |
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105 | static int og_dbi_schema_v1(struct og_dbi *dbi) |
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106 | { |
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107 | const char *msglog, *command; |
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108 | dbi_result result, result_alter; |
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109 | |
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110 | result = dbi_conn_queryf(dbi->conn, "SELECT concat('alter table `',TABLE_SCHEMA,'`.`',TABLE_NAME,'` engine=innodb;')" |
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111 | "AS cmd FROM information_schema.TABLES WHERE TABLE_SCHEMA='%s'", |
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112 | ogconfig.db.name); |
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113 | |
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114 | while (dbi_result_next_row(result)) { |
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115 | command = dbi_result_get_string(result, "cmd"); |
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116 | |
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117 | syslog(LOG_DEBUG, "Upgrading to innoDB: %s\n", command); |
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118 | result_alter = dbi_conn_query(dbi->conn, command); |
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119 | if (!result_alter) { |
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120 | dbi_conn_error(dbi->conn, &msglog); |
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121 | syslog(LOG_INFO, "Error when upgrading engine to innoDB (%s:%d) %s\n", |
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122 | __func__, __LINE__, msglog); |
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123 | return -1; |
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124 | } |
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125 | dbi_result_free(result_alter); |
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126 | } |
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127 | dbi_result_free(result); |
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128 | |
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129 | result = dbi_conn_query(dbi->conn, "UPDATE version SET version = 1"); |
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130 | if (!result) { |
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131 | dbi_conn_error(dbi->conn, &msglog); |
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132 | syslog(LOG_INFO, "Could not update version row (%s:%d) %s\n", |
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133 | __func__, __LINE__, msglog); |
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134 | return -1; |
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135 | } |
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136 | dbi_result_free(result); |
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137 | |
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138 | return 0; |
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139 | } |
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140 | |
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141 | static int og_dbi_schema_v2(struct og_dbi *dbi) |
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142 | { |
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143 | const char *msglog; |
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144 | dbi_result result; |
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145 | int ret, i; |
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146 | |
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147 | ret = dbi_conn_transaction_begin(dbi->conn); |
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148 | if (ret) { |
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149 | syslog(LOG_DEBUG, "could not begin a transaction (%s:%d)\n", |
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150 | __func__, __LINE__); |
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151 | goto err_no_trans; |
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152 | } |
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153 | |
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154 | for (i = 0; i < OG_SCHEMA_STMTS_V2; i++) { |
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155 | result = dbi_conn_query(dbi->conn, stmts_v2[i]); |
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156 | if (!result) { |
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157 | dbi_conn_error(dbi->conn, &msglog); |
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158 | syslog(LOG_ERR, "Statement number %d failed (%s:%d): %s\n", |
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159 | i, __func__, __LINE__, msglog); |
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160 | goto err_trans; |
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161 | } |
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162 | dbi_result_free(result); |
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163 | } |
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164 | |
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165 | ret = dbi_conn_transaction_commit(dbi->conn); |
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166 | if (ret) { |
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167 | syslog(LOG_DEBUG, "could not commit a transaction (%s:%d)\n", |
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168 | __func__, __LINE__); |
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169 | goto err_trans; |
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170 | } |
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171 | return 0; |
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172 | |
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173 | err_trans: |
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174 | dbi_conn_transaction_rollback(dbi->conn); |
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175 | err_no_trans: |
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176 | return -1; |
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177 | } |
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178 | |
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179 | static int og_dbi_schema_v3(struct og_dbi *dbi) |
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180 | { |
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181 | const char *msglog; |
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182 | dbi_result result; |
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183 | |
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184 | syslog(LOG_DEBUG, "Adding disk type to ordenadores_particiones\n"); |
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185 | result = dbi_conn_query(dbi->conn, |
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186 | "ALTER TABLE ordenadores_particiones " |
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187 | "ADD disk_type VARCHAR(32) DEFAULT NULL " |
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188 | "AFTER numdisk;"); |
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189 | if (!result) { |
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190 | dbi_conn_error(dbi->conn, &msglog); |
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191 | syslog(LOG_INFO, "Error when adding disk type (%s:%d) %s\n", |
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192 | __func__, __LINE__, msglog); |
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193 | return -1; |
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194 | } |
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195 | dbi_result_free(result); |
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196 | |
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197 | result = dbi_conn_query(dbi->conn, "UPDATE version SET version = 3"); |
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198 | if (!result) { |
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199 | dbi_conn_error(dbi->conn, &msglog); |
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200 | syslog(LOG_INFO, "Could not update version row (%s:%d) %s\n", |
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201 | __func__, __LINE__, msglog); |
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202 | return -1; |
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203 | } |
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204 | dbi_result_free(result); |
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205 | |
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206 | return 0; |
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207 | } |
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208 | |
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209 | static struct og_schema_version { |
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210 | int version; |
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211 | int (*update)(struct og_dbi *dbi); |
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212 | } schema_version[] = { |
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213 | { .version = 1, .update = og_dbi_schema_v1 }, |
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214 | { .version = 2, .update = og_dbi_schema_v2 }, |
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215 | { .version = 3, .update = og_dbi_schema_v3 }, |
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216 | { 0, NULL }, |
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217 | }; |
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218 | |
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219 | int og_dbi_schema_update(void) |
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220 | { |
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221 | int version, i, err; |
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222 | struct og_dbi *dbi; |
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223 | const char *msglog; |
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224 | |
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225 | dbi = og_dbi_open(&ogconfig.db); |
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226 | if (!dbi) { |
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227 | dbi_conn_error(dbi->conn, &msglog); |
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228 | syslog(LOG_ERR, "failed to query database (%s:%d) %s\n", |
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229 | __func__, __LINE__, msglog); |
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230 | return -1; |
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231 | } |
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232 | |
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233 | version = og_dbi_schema_version(dbi); |
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234 | |
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235 | if (version < 0) { |
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236 | syslog(LOG_INFO, "creating table version in schema\n"); |
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237 | og_dbi_create_version(dbi); |
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238 | } else { |
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239 | syslog(LOG_INFO, "database schema version %d\n", version); |
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240 | } |
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241 | |
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242 | for (i = 0; schema_version[i].version; i++) { |
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243 | if (version >= schema_version[i].version) |
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244 | continue; |
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245 | |
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246 | syslog(LOG_INFO, "upgrading to schema version %d\n", schema_version[i].version); |
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247 | |
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248 | err = schema_version[i].update(dbi); |
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249 | if (err < 0) { |
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250 | syslog(LOG_ERR, "failed to update schema!\n"); |
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251 | og_dbi_close(dbi); |
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252 | return -1; |
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253 | } |
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254 | } |
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255 | |
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256 | og_dbi_close(dbi); |
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257 | |
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258 | return 0; |
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259 | } |
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