283 lines
7.0 KiB
C
283 lines
7.0 KiB
C
/*
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* net/tipc/core.c: TIPC module code
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*
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* Copyright (c) 2003-2005, Ericsson Research Canada
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* Copyright (c) 2005, Wind River Systems
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* Copyright (c) 2005-2006, Ericsson AB
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/version.h>
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#include <linux/random.h>
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#include "core.h"
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#include "dbg.h"
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#include "ref.h"
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#include "net.h"
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#include "user_reg.h"
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#include "name_table.h"
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#include "subscr.h"
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#include "config.h"
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int eth_media_start(void);
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void eth_media_stop(void);
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int handler_start(void);
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void handler_stop(void);
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int socket_init(void);
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void socket_stop(void);
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int netlink_start(void);
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void netlink_stop(void);
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#define MOD_NAME "tipc_start: "
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#ifndef CONFIG_TIPC_ZONES
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#define CONFIG_TIPC_ZONES 3
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#endif
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#ifndef CONFIG_TIPC_CLUSTERS
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#define CONFIG_TIPC_CLUSTERS 1
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#endif
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#ifndef CONFIG_TIPC_NODES
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#define CONFIG_TIPC_NODES 255
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#endif
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#ifndef CONFIG_TIPC_SLAVE_NODES
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#define CONFIG_TIPC_SLAVE_NODES 0
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#endif
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#ifndef CONFIG_TIPC_PORTS
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#define CONFIG_TIPC_PORTS 8191
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#endif
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#ifndef CONFIG_TIPC_LOG
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#define CONFIG_TIPC_LOG 0
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#endif
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/* global variables used by multiple sub-systems within TIPC */
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int tipc_mode = TIPC_NOT_RUNNING;
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int tipc_random;
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atomic_t tipc_user_count = ATOMIC_INIT(0);
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const char tipc_alphabet[] =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
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/* configurable TIPC parameters */
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u32 tipc_own_addr;
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int tipc_max_zones;
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int tipc_max_clusters;
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int tipc_max_nodes;
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int tipc_max_slaves;
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int tipc_max_ports;
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int tipc_max_subscriptions;
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int tipc_max_publications;
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int tipc_net_id;
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int tipc_remote_management;
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int tipc_get_mode(void)
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{
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return tipc_mode;
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}
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/**
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* stop_net - shut down TIPC networking sub-systems
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*/
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void stop_net(void)
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{
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eth_media_stop();
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tipc_stop_net();
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}
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/**
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* start_net - start TIPC networking sub-systems
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*/
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int start_net(void)
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{
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int res;
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if ((res = tipc_start_net()) ||
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(res = eth_media_start())) {
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stop_net();
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}
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return res;
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}
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/**
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* stop_core - switch TIPC from SINGLE NODE to NOT RUNNING mode
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*/
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void stop_core(void)
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{
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if (tipc_mode != TIPC_NODE_MODE)
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return;
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tipc_mode = TIPC_NOT_RUNNING;
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netlink_stop();
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handler_stop();
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cfg_stop();
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subscr_stop();
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reg_stop();
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nametbl_stop();
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ref_table_stop();
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socket_stop();
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}
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/**
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* start_core - switch TIPC from NOT RUNNING to SINGLE NODE mode
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*/
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int start_core(void)
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{
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int res;
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if (tipc_mode != TIPC_NOT_RUNNING)
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return -ENOPROTOOPT;
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get_random_bytes(&tipc_random, sizeof(tipc_random));
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tipc_mode = TIPC_NODE_MODE;
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if ((res = handler_start()) ||
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(res = ref_table_init(tipc_max_ports + tipc_max_subscriptions,
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tipc_random)) ||
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(res = reg_start()) ||
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(res = nametbl_init()) ||
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(res = k_signal((Handler)subscr_start, 0)) ||
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(res = k_signal((Handler)cfg_init, 0)) ||
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(res = netlink_start()) ||
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(res = socket_init())) {
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stop_core();
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}
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return res;
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}
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static int __init tipc_init(void)
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{
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int res;
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log_reinit(CONFIG_TIPC_LOG);
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info("Activated (compiled " __DATE__ " " __TIME__ ")\n");
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tipc_own_addr = 0;
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tipc_remote_management = 1;
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tipc_max_publications = 10000;
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tipc_max_subscriptions = 2000;
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tipc_max_ports = delimit(CONFIG_TIPC_PORTS, 127, 65536);
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tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 511);
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tipc_max_clusters = delimit(CONFIG_TIPC_CLUSTERS, 1, 1);
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tipc_max_nodes = delimit(CONFIG_TIPC_NODES, 8, 2047);
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tipc_max_slaves = delimit(CONFIG_TIPC_SLAVE_NODES, 0, 2047);
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tipc_net_id = 4711;
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if ((res = start_core()))
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err("Unable to start in single node mode\n");
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else
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info("Started in single node mode\n");
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return res;
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}
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static void __exit tipc_exit(void)
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{
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stop_net();
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stop_core();
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info("Deactivated\n");
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log_stop();
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}
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module_init(tipc_init);
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module_exit(tipc_exit);
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MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
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MODULE_LICENSE("Dual BSD/GPL");
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/* Native TIPC API for kernel-space applications (see tipc.h) */
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EXPORT_SYMBOL(tipc_attach);
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EXPORT_SYMBOL(tipc_detach);
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EXPORT_SYMBOL(tipc_get_addr);
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EXPORT_SYMBOL(tipc_get_mode);
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EXPORT_SYMBOL(tipc_createport);
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EXPORT_SYMBOL(tipc_deleteport);
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EXPORT_SYMBOL(tipc_ownidentity);
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EXPORT_SYMBOL(tipc_portimportance);
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EXPORT_SYMBOL(tipc_set_portimportance);
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EXPORT_SYMBOL(tipc_portunreliable);
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EXPORT_SYMBOL(tipc_set_portunreliable);
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EXPORT_SYMBOL(tipc_portunreturnable);
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EXPORT_SYMBOL(tipc_set_portunreturnable);
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EXPORT_SYMBOL(tipc_publish);
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EXPORT_SYMBOL(tipc_withdraw);
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EXPORT_SYMBOL(tipc_connect2port);
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EXPORT_SYMBOL(tipc_disconnect);
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EXPORT_SYMBOL(tipc_shutdown);
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EXPORT_SYMBOL(tipc_isconnected);
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EXPORT_SYMBOL(tipc_peer);
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EXPORT_SYMBOL(tipc_ref_valid);
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EXPORT_SYMBOL(tipc_send);
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EXPORT_SYMBOL(tipc_send_buf);
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EXPORT_SYMBOL(tipc_send2name);
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EXPORT_SYMBOL(tipc_forward2name);
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EXPORT_SYMBOL(tipc_send_buf2name);
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EXPORT_SYMBOL(tipc_forward_buf2name);
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EXPORT_SYMBOL(tipc_send2port);
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EXPORT_SYMBOL(tipc_forward2port);
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EXPORT_SYMBOL(tipc_send_buf2port);
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EXPORT_SYMBOL(tipc_forward_buf2port);
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EXPORT_SYMBOL(tipc_multicast);
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/* EXPORT_SYMBOL(tipc_multicast_buf); not available yet */
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EXPORT_SYMBOL(tipc_ispublished);
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EXPORT_SYMBOL(tipc_available_nodes);
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/* TIPC API for external bearers (see tipc_bearer.h) */
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EXPORT_SYMBOL(tipc_block_bearer);
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EXPORT_SYMBOL(tipc_continue);
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EXPORT_SYMBOL(tipc_disable_bearer);
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EXPORT_SYMBOL(tipc_enable_bearer);
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EXPORT_SYMBOL(tipc_recv_msg);
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EXPORT_SYMBOL(tipc_register_media);
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/* TIPC API for external APIs (see tipc_port.h) */
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EXPORT_SYMBOL(tipc_createport_raw);
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EXPORT_SYMBOL(tipc_set_msg_option);
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EXPORT_SYMBOL(tipc_reject_msg);
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EXPORT_SYMBOL(tipc_send_buf_fast);
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EXPORT_SYMBOL(tipc_acknowledge);
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EXPORT_SYMBOL(tipc_get_port);
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EXPORT_SYMBOL(tipc_get_handle);
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