0,0 → 1,161 |
/* |
* Project: S.Ha.R.K. |
* |
* Coordinators: |
* Giorgio Buttazzo <giorgio@sssup.it> |
* Paolo Gai <pj@gandalf.sssup.it> |
* |
* Authors : |
* Trimarchi Michael <trimarchi@gandalf.sssup.it> |
* (see the web pages for full authors list) |
* |
* ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
* |
* http://www.sssup.it |
* http://retis.sssup.it |
* http://shark.sssup.it |
*/ |
|
/* |
* Copyright (C) 2000 Giorgio Buttazzo, Paolo Gai |
* |
* This program is free software; you can redistribute it and/or modify |
* it under the terms of the GNU General Public License as published by |
* the Free Software Foundation; either version 2 of the License, or |
* (at your option) any later version. |
* |
* This program is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
* GNU General Public License for more details. |
* |
* You should have received a copy of the GNU General Public License |
* along with this program; if not, write to the Free Software |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
* |
* |
* CVS : $Id: server-task.c,v 1.1 2004-05-20 12:13:55 trimarchi Exp $ |
*/ |
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#include <kernel/kern.h> |
#include <modules/cabs.h> |
#include <string.h> |
#include "message.h" |
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char *mchannel[2]={"MCHANR","MCHANW"}; |
CAB mchannelid[2]; |
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TASK service_task(void *arg) { |
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int id=(int) arg; |
struct mess_type message; |
CAB ch=mchannelid[id]; |
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while(1) { |
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message = (struct mess_type) cab_getmes(channel); |
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switch (message.type) { |
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case NEGOTIATE_CONTRACT: |
if (negotiate_contract(message.contract, message.server)!=FSF_ERR_CONTRACT_REJECTED) { |
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} else { |
} |
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break; |
case RENEGOTIATE_CONTRACT: |
renegotiate_contract(message.contract, message.server); |
break; |
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default : |
break; |
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} |
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task_endcycle(); |
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} |
} |
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int negotiate_contract |
(const fsf_contract_parameters_t *contract, |
fsf_server_id_t *server) |
{ |
TIME T; |
TIME Q; |
/* Check if contract is initialized */ |
if (!contract) return FSF_ERR_NOT_INITIALIZED; |
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/* Admission Test */ |
if (FSF_ADMISSION_TEST_IS_ENABLED) |
if (add_contract(contract)) |
return FSF_ERR_CONTRACT_REJECTED; |
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|
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} |
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int recalculate_contract(bandwidth_t U) { |
bandwidth_t current_bandwidth; |
unsigned int temp_U; |
int Qt; |
int isok=0; |
int i=0; |
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#ifdef FSF_DEBUG |
int temp; |
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kern_printf("(Recalculate contract)"); |
#endif |
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/* The current bandwidth is the min bandwidth */ |
//current_bandwidth=SERVER_return_bandwidth(fsf_server_level); |
#ifdef FSF_DEBUG |
kern_printf("(nserver %d)", current_server); |
#endif |
|
do { |
current_bandwidth=0; |
Qt=0; |
for (i=0; i<current_server; i++) { |
if (server_list[i].Qs!=0 && server_list[i].U<server_list[i].Umax) |
Qt+=server_list[i].Qs; |
current_bandwidth+=server_list[i].U; |
} |
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#ifdef FSF_DEBUG |
kern_printf("(Total Quality %d)", Qt); |
#endif |
isok=1; |
for (i=0; i<current_server; i++) { |
if (server_list[i].Qs!=0 && server_list[i].U<server_list[i].Umax) { |
temp_U=server_list[i].U; |
server_list[i].U=U-current_bandwidth; |
mul32div32to32(server_list[i].U, server_list[i].Qs, Qt, server_list[i].U); |
temp_U+=server_list[i].U; |
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if (temp_U<=server_list[i].Umin) { |
server_list[i].U=server_list[i].Umin; |
} else if (temp_U>server_list[i].Umax) { |
server_list[i].U=server_list[i].Umax; |
isok=0; |
} else server_list[i].U=temp_U; |
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#ifdef FSF_DEBUG |
mul32div32to32(server_list[i].U,100, MAX_BANDWIDTH, temp); |
kern_printf("(Server %d bw %d)", server_list[i].server, temp); |
#endif |
} |
} |
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} while (!isok); |
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return 0; |
} |