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668 | trimarchi | 1 | /* |
2 | * Project: S.Ha.R.K. |
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3 | * |
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4 | * Coordinators: |
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5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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6 | * Paolo Gai <pj@gandalf.sssup.it> |
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7 | * |
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8 | * Authors : |
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9 | * Trimarchi Michael <trimarchi@gandalf.sssup.it> |
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10 | * (see the web pages for full authors list) |
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11 | * |
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12 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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13 | * |
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14 | * http://www.sssup.it |
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15 | * http://retis.sssup.it |
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16 | * http://shark.sssup.it |
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17 | */ |
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18 | |||
19 | /* |
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20 | * Copyright (C) 2000 Giorgio Buttazzo, Paolo Gai |
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21 | * |
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22 | * This program is free software; you can redistribute it and/or modify |
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23 | * it under the terms of the GNU General Public License as published by |
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24 | * the Free Software Foundation; either version 2 of the License, or |
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25 | * (at your option) any later version. |
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26 | * |
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27 | * This program is distributed in the hope that it will be useful, |
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28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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30 | * GNU General Public License for more details. |
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31 | * |
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32 | * You should have received a copy of the GNU General Public License |
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33 | * along with this program; if not, write to the Free Software |
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34 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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35 | * |
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36 | * |
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909 | trimarchi | 37 | * CVS : $Id: server-task.c,v 1.14 2004-12-17 13:19:42 trimarchi Exp $ |
668 | trimarchi | 38 | */ |
39 | |||
679 | trimarchi | 40 | #include "ll/i386/64bit.h" |
868 | trimarchi | 41 | #include "fsf_configuration_parameters.h" |
880 | trimarchi | 42 | #include "fsf.h" |
868 | trimarchi | 43 | #include "fsf_service_task.h" |
44 | #include "message.h" |
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668 | trimarchi | 45 | #include <kernel/kern.h> |
679 | trimarchi | 46 | #include <modules/sem.h> |
47 | #include <modules/hartport.h> |
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668 | trimarchi | 48 | #include <modules/cabs.h> |
49 | |||
868 | trimarchi | 50 | //#define FSF_DEBUG |
880 | trimarchi | 51 | extern fsf_server_id_t service_server; |
868 | trimarchi | 52 | |
53 | TASK service_task(void) { |
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679 | trimarchi | 54 | |
868 | trimarchi | 55 | struct mess msg; |
56 | fsf_renegotiation_status_t status; |
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57 | int wait_renegotiation=0; |
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909 | trimarchi | 58 | |
679 | trimarchi | 59 | PORT rec,tra; |
868 | trimarchi | 60 | |
679 | trimarchi | 61 | rec = port_connect("CHANW",sizeof(struct mess),STREAM,READ); |
668 | trimarchi | 62 | |
679 | trimarchi | 63 | tra = port_connect("CHANR",sizeof(struct mess),STREAM,WRITE); |
668 | trimarchi | 64 | |
65 | while(1) { |
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868 | trimarchi | 66 | // wait for operation |
67 | if (wait_renegotiation) { |
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68 | if (!fsf_get_renegotiation_status(msg.server,&status)) { |
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69 | if (status==FSF_ADMITTED) { |
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70 | // send response server is -1 if the operation fail |
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71 | #ifdef FSF_DEBUG |
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72 | kern_printf("ADM"); |
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73 | #endif |
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74 | wait_renegotiation=0; |
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908 | trimarchi | 75 | //kern_printf("(REN %d)", msg.server); |
868 | trimarchi | 76 | port_send(tra,&msg,BLOCK); |
909 | trimarchi | 77 | |
868 | trimarchi | 78 | continue; |
79 | } else |
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80 | #ifdef FSF_DEBUG |
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81 | kern_printf("WAIT") |
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82 | #endif |
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83 | ; |
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84 | } |
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85 | } else { |
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86 | port_receive(rec,&msg,BLOCK); |
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877 | trimarchi | 87 | #ifdef FSF_DEBUG |
868 | trimarchi | 88 | kern_printf("Message "); |
877 | trimarchi | 89 | #endif |
868 | trimarchi | 90 | switch (msg.type) { |
91 | |||
92 | case NEGOTIATE_CONTRACT: |
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93 | if (negotiate_contract(&msg.contract, &msg.server)==FSF_ERR_CONTRACT_REJECTED) |
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94 | msg.server=-1; |
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880 | trimarchi | 95 | else { |
96 | wait_renegotiation=1; |
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97 | //task_endcycle(); |
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98 | continue; |
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99 | } |
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100 | break; |
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868 | trimarchi | 101 | |
102 | case REQUEST_RENEGOTIATE_CONTRACT: |
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103 | if (renegotiate_contract(&msg.contract, msg.server)==FSF_ERR_CONTRACT_REJECTED) |
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104 | msg.server=-1; |
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105 | break; |
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106 | |||
107 | case RENEGOTIATE_CONTRACT: |
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108 | if (renegotiate_contract(&msg.contract, msg.server)==FSF_ERR_CONTRACT_REJECTED) |
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109 | msg.server=-1; |
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110 | else { |
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111 | wait_renegotiation=1; |
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112 | //task_endcycle(); |
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113 | continue; |
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114 | } |
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115 | break; |
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908 | trimarchi | 116 | case CHANGE_PARAMETER: |
117 | { |
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118 | fsf_contract_parameters_t new_contract; |
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119 | struct timespec period; |
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120 | struct timespec budget; |
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121 | int i=0; |
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122 | // this CASE change the quality and importance |
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123 | //fsf_initialize_contract(&new_contract); |
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124 | // find contract |
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125 | while(i<current_server) { |
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126 | if (server_list[i].server==msg.server) break; |
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127 | i++; |
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128 | } |
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129 | //kern_printf("(RCQI)"); |
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130 | NULL_TIMESPEC(&period); |
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131 | ADDUSEC2TIMESPEC(server_list[i].Tmax, &period); |
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132 | NULL_TIMESPEC(&budget); |
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133 | ADDUSEC2TIMESPEC(server_list[i].Cmin, &budget); |
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134 | |||
135 | fsf_set_contract_basic_parameters(&new_contract,&budget,&period,FSF_DEFAULT_WORKLOAD); |
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136 | NULL_TIMESPEC(&period); |
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137 | ADDUSEC2TIMESPEC(server_list[i].Tmin, &period); |
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138 | NULL_TIMESPEC(&budget); |
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139 | ADDUSEC2TIMESPEC(server_list[i].Cmax, &budget); |
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140 | |||
141 | fsf_set_contract_reclamation_parameters(&new_contract, &budget, &period, FSF_DEFAULT_GRANULARITY,NULL, |
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142 | msg.qi.quality,msg.qi.importance); |
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143 | |||
144 | if (server_list[i].d_equals_t == true) { |
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145 | NULL_TIMESPEC(&new_contract.deadline); |
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146 | new_contract.d_equals_t = true; |
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147 | } else { |
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148 | NULL_TIMESPEC(&period); |
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149 | ADDUSEC2TIMESPEC(server_list[i].deadline, &period); |
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150 | TIMESPEC_ASSIGN(&new_contract.deadline, &period); |
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151 | new_contract.d_equals_t = false; |
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152 | } |
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153 | if (renegotiate_contract(&new_contract, msg.server)==FSF_ERR_CONTRACT_REJECTED) |
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154 | msg.server=-1; |
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155 | } |
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893 | trimarchi | 156 | break; |
157 | |||
868 | trimarchi | 158 | default : |
159 | break; |
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160 | |||
161 | } |
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909 | trimarchi | 162 | |
868 | trimarchi | 163 | port_send(tra,&msg,BLOCK); |
909 | trimarchi | 164 | |
668 | trimarchi | 165 | } |
166 | } |
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167 | } |
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168 | |||
688 | trimarchi | 169 | |
170 | static __inline void set_contract_parameter(void) { |
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171 | |||
172 | int i=0; |
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679 | trimarchi | 173 | TIME T,Q; |
868 | trimarchi | 174 | |
175 | for (i=0; i<current_server; i++) { |
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679 | trimarchi | 176 | mul32div32to32(MAX_BANDWIDTH,server_list[i].Cmin,server_list[i].U,T); |
177 | if (T > server_list[i].Tmin ) { |
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178 | server_list[i].actual_budget = server_list[i].Cmin; |
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179 | server_list[i].actual_period = T; |
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180 | #ifdef FSF_DEBUG |
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181 | kern_printf("(1 - Q %ld T %ld)", server_list[i].actual_budget, server_list[i].actual_period); |
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182 | #endif |
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908 | trimarchi | 183 | if (server_list[i].d_equals_t == true) |
679 | trimarchi | 184 | adjust_SERVER_budget(server_list[i].server,server_list[i].Cmin, T, T); |
185 | else |
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186 | adjust_SERVER_budget(server_list[i].server,server_list[i].Cmin, T, server_list[i].deadline); |
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187 | |||
188 | } else { |
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189 | mul32div32to32(server_list[i].Tmin,server_list[i].U,MAX_BANDWIDTH,Q); |
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190 | server_list[i].actual_budget = Q; |
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191 | server_list[i].actual_period = server_list[i].Tmin; |
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192 | #ifdef FSF_DEBUG |
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193 | kern_printf("(2 - Q %ld T %ld)", server_list[i].actual_budget, server_list[i].actual_period); |
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194 | #endif |
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195 | |||
908 | trimarchi | 196 | if (server_list[i].d_equals_t == true) |
679 | trimarchi | 197 | adjust_SERVER_budget(server_list[i].server,server_list[i].Cmin, server_list[i].Tmin, server_list[i].Tmin); |
198 | else |
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199 | adjust_SERVER_budget(server_list[i].server,server_list[i].Cmin, server_list[i].Tmin, server_list[i].deadline); |
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200 | } |
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201 | |||
202 | server_list[i].U=server_list[i].Umin; |
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203 | } |
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204 | |||
688 | trimarchi | 205 | } |
206 | |||
207 | |||
208 | int renegotiate_contract |
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209 | (const fsf_contract_parameters_t *new_contract, |
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210 | fsf_server_id_t server) |
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211 | { |
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212 | |||
213 | #ifdef FSF_DEBUG |
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214 | kern_printf("(Renegotiate for server %d)",server); |
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215 | #endif |
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216 | |||
217 | if (!new_contract) |
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868 | trimarchi | 218 | return FSF_ERR_BAD_ARGUMENT; |
688 | trimarchi | 219 | |
220 | if (server < 0) |
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875 | trimarchi | 221 | return FSF_ERR_BAD_ARGUMENT; |
688 | trimarchi | 222 | |
223 | // change the parameter |
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224 | relink_contract_to_server(new_contract, server); |
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225 | if (recalculate_contract(fsf_max_bw)==-1) { |
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875 | trimarchi | 226 | return FSF_ERR_CONTRACT_REJECTED; |
688 | trimarchi | 227 | } |
228 | |||
229 | set_contract_parameter(); |
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230 | |||
679 | trimarchi | 231 | return 0; |
232 | } |
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233 | |||
668 | trimarchi | 234 | int negotiate_contract |
679 | trimarchi | 235 | (const fsf_contract_parameters_t *contract, |
236 | fsf_server_id_t *server) |
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668 | trimarchi | 237 | { |
238 | /* Check if contract is initialized */ |
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868 | trimarchi | 239 | if (!contract) return FSF_ERR_BAD_ARGUMENT; |
668 | trimarchi | 240 | |
241 | /* Admission Test */ |
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242 | if (FSF_ADMISSION_TEST_IS_ENABLED) |
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243 | if (add_contract(contract)) |
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244 | return FSF_ERR_CONTRACT_REJECTED; |
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245 | |||
679 | trimarchi | 246 | /* SERVER => BUDGET */ |
247 | set_SERVER_budget_from_contract(contract,server); |
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668 | trimarchi | 248 | |
688 | trimarchi | 249 | #ifdef FSF_DEBUG |
250 | kern_printf("(New Server %d)",*server); |
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251 | #endif |
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679 | trimarchi | 252 | |
253 | if (*server >= 0) { |
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254 | link_contract_to_server(contract,*server); |
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255 | if (recalculate_contract(fsf_max_bw)==-1) { |
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868 | trimarchi | 256 | remove_contract(server); |
875 | trimarchi | 257 | return FSF_ERR_CONTRACT_REJECTED; |
679 | trimarchi | 258 | } |
688 | trimarchi | 259 | set_contract_parameter(); |
679 | trimarchi | 260 | #ifdef FSF_DEBUG |
261 | kern_printf("(Adjust budget)"); |
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262 | #endif |
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688 | trimarchi | 263 | |
679 | trimarchi | 264 | } |
265 | else { |
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875 | trimarchi | 266 | return FSF_ERR_CONTRACT_REJECTED; |
679 | trimarchi | 267 | } |
880 | trimarchi | 268 | //kern_printf("(ENCR)"); |
679 | trimarchi | 269 | return 0; |
270 | |||
668 | trimarchi | 271 | } |
272 |