/*
* net / tipc / core . c : TIPC module code
*
* Copyright ( c ) 2003 - 2006 , 2013 , Ericsson AB
* Copyright ( c ) 2005 - 2006 , 2010 - 2013 , Wind River Systems
* All rights reserved .
*
* Redistribution and use in source and binary forms , with or without
* modification , are permitted provided that the following conditions are met :
*
* 1 . Redistributions of source code must retain the above copyright
* notice , this list of conditions and the following disclaimer .
* 2 . Redistributions in binary form must reproduce the above copyright
* notice , this list of conditions and the following disclaimer in the
* documentation and / or other materials provided with the distribution .
* 3 . Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission .
*
* Alternatively , this software may be distributed under the terms of the
* GNU General Public License ( " GPL " ) version 2 as published by the Free
* Software Foundation .
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS " AS IS "
* AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT LIMITED TO , THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED . IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT , INDIRECT , INCIDENTAL , SPECIAL , EXEMPLARY , OR
* CONSEQUENTIAL DAMAGES ( INCLUDING , BUT NOT LIMITED TO , PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES ; LOSS OF USE , DATA , OR PROFITS ; OR BUSINESS
* INTERRUPTION ) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY , WHETHER IN
* CONTRACT , STRICT LIABILITY , OR TORT ( INCLUDING NEGLIGENCE OR OTHERWISE )
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE , EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE .
*/
#include "core.h"
#include "name_table.h"
#include "subscr.h"
#include "bearer.h"
#include "net.h"
#include "socket.h"
#include "bcast.h"
#include "node.h"
#include "crypto.h"
#include <linux/module.h>
/* configurable TIPC parameters */
unsigned int tipc_net_id __read_mostly;
int sysctl_tipc_rmem[3 ] __read_mostly; /* min/default/max */
static int __net_init tipc_init_net(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
int err;
tn->net_id = 4711 ;
tn->node_addr = 0 ;
tn->trial_addr = 0 ;
tn->addr_trial_end = 0 ;
tn->capabilities = TIPC_NODE_CAPABILITIES;
INIT_WORK(&tn->work, tipc_net_finalize_work);
memset(tn->node_id, 0 , sizeof (tn->node_id));
memset(tn->node_id_string, 0 , sizeof (tn->node_id_string));
tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
get_random_bytes(&tn->random, sizeof (int ));
INIT_LIST_HEAD(&tn->node_list);
spin_lock_init(&tn->node_list_lock);
#ifdef CONFIG_TIPC_CRYPTO
err = tipc_crypto_start(&tn->crypto_tx, net, NULL);
if (err)
goto out_crypto;
#endif
err = tipc_sk_rht_init(net);
if (err)
goto out_sk_rht;
err = tipc_nametbl_init(net);
if (err)
goto out_nametbl;
err = tipc_bcast_init(net);
if (err)
goto out_bclink;
err = tipc_attach_loopback(net);
if (err)
goto out_bclink;
return 0 ;
out_bclink:
tipc_nametbl_stop(net);
out_nametbl:
tipc_sk_rht_destroy(net);
out_sk_rht:
#ifdef CONFIG_TIPC_CRYPTO
tipc_crypto_stop(&tn->crypto_tx);
out_crypto:
#endif
return err;
}
static void __net_exit tipc_exit_net(struct net *net)
{
struct tipc_net *tn = tipc_net(net);
tipc_detach_loopback(net);
tipc_net_stop(net);
/* Make sure the tipc_net_finalize_work() finished */
cancel_work_sync(&tn->work);
tipc_bcast_stop(net);
tipc_nametbl_stop(net);
tipc_sk_rht_destroy(net);
#ifdef CONFIG_TIPC_CRYPTO
tipc_crypto_stop(&tipc_net(net)->crypto_tx);
#endif
while (atomic_read(&tn->wq_count))
cond_resched();
}
static void __net_exit tipc_pernet_pre_exit(struct net *net)
{
tipc_node_pre_cleanup_net(net);
}
static struct pernet_operations tipc_pernet_pre_exit_ops = {
.pre_exit = tipc_pernet_pre_exit,
};
static struct pernet_operations tipc_net_ops = {
.init = tipc_init_net,
.exit = tipc_exit_net,
.id = &tipc_net_id,
.size = sizeof (struct tipc_net),
};
static struct pernet_operations tipc_topsrv_net_ops = {
.init = tipc_topsrv_init_net,
.exit = tipc_topsrv_exit_net,
};
static int __init tipc_init(void )
{
int err;
pr_info("Activated (version " TIPC_MOD_VER ")\n" );
sysctl_tipc_rmem[0 ] = RCVBUF_MIN;
sysctl_tipc_rmem[1 ] = RCVBUF_DEF;
sysctl_tipc_rmem[2 ] = RCVBUF_MAX;
err = tipc_register_sysctl();
if (err)
goto out_sysctl;
err = register_pernet_device(&tipc_net_ops);
if (err)
goto out_pernet;
err = tipc_socket_init();
if (err)
goto out_socket;
err = register_pernet_device(&tipc_topsrv_net_ops);
if (err)
goto out_pernet_topsrv;
err = register_pernet_subsys(&tipc_pernet_pre_exit_ops);
if (err)
goto out_register_pernet_subsys;
err = tipc_bearer_setup();
if (err)
goto out_bearer;
err = tipc_netlink_start();
if (err)
goto out_netlink;
err = tipc_netlink_compat_start();
if (err)
goto out_netlink_compat;
pr_info("Started in single node mode\n" );
return 0 ;
out_netlink_compat:
tipc_netlink_stop();
out_netlink:
tipc_bearer_cleanup();
out_bearer:
unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
out_register_pernet_subsys:
unregister_pernet_device(&tipc_topsrv_net_ops);
out_pernet_topsrv:
tipc_socket_stop();
out_socket:
unregister_pernet_device(&tipc_net_ops);
out_pernet:
tipc_unregister_sysctl();
out_sysctl:
pr_err("Unable to start in single node mode\n" );
return err;
}
static void __exit tipc_exit(void )
{
tipc_netlink_compat_stop();
tipc_netlink_stop();
tipc_bearer_cleanup();
unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
unregister_pernet_device(&tipc_topsrv_net_ops);
tipc_socket_stop();
unregister_pernet_device(&tipc_net_ops);
tipc_unregister_sysctl();
pr_info("Deactivated\n" );
}
module_init(tipc_init);
module_exit(tipc_exit);
MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication" );
MODULE_LICENSE("Dual BSD/GPL" );
MODULE_VERSION(TIPC_MOD_VER);
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