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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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57f1d1868f
When a topology server accepts a connection request from its client, it allocates a connection instance and a tipc_subscriber structure object. The former is used to communicate with client, and the latter is often treated as a subscriber which manages all subscription events requested from a same client. When a topology server receives a request of subscribing name services from a client through the connection, it creates a tipc_subscription structure instance which is seen as a subscription recording what name services are subscribed. In order to manage all subscriptions from a same client, topology server links them into the subscrp_list of the subscriber. So subscriber and subscription completely represents different meanings respectively, but function names associated with them make us so confused that we are unable to easily tell which function is against subscriber and which is to subscription. So we want to eliminate the confusion by renaming them. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Jon Maloy <jon.maloy@ericson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
169 lines
4.4 KiB
C
169 lines
4.4 KiB
C
/*
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* net/tipc/core.c: TIPC module code
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*
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* Copyright (c) 2003-2006, 2013, Ericsson AB
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* Copyright (c) 2005-2006, 2010-2013, Wind River Systems
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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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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. 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
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include "core.h"
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#include "name_table.h"
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#include "subscr.h"
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#include "bearer.h"
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#include "net.h"
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#include "socket.h"
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#include <linux/module.h>
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/* configurable TIPC parameters */
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int tipc_net_id __read_mostly;
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int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */
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static int __net_init tipc_init_net(struct net *net)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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int err;
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tn->net_id = 4711;
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tn->own_addr = 0;
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get_random_bytes(&tn->random, sizeof(int));
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INIT_LIST_HEAD(&tn->node_list);
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spin_lock_init(&tn->node_list_lock);
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err = tipc_sk_rht_init(net);
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if (err)
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goto out_sk_rht;
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err = tipc_nametbl_init(net);
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if (err)
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goto out_nametbl;
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err = tipc_topsrv_start(net);
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if (err)
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goto out_subscr;
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return 0;
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out_subscr:
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tipc_nametbl_stop(net);
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out_nametbl:
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tipc_sk_rht_destroy(net);
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out_sk_rht:
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return err;
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}
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static void __net_exit tipc_exit_net(struct net *net)
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{
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tipc_topsrv_stop(net);
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tipc_net_stop(net);
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tipc_nametbl_stop(net);
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tipc_sk_rht_destroy(net);
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}
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static struct pernet_operations tipc_net_ops = {
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.init = tipc_init_net,
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.exit = tipc_exit_net,
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.id = &tipc_net_id,
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.size = sizeof(struct tipc_net),
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};
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static int __init tipc_init(void)
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{
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int err;
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pr_info("Activated (version " TIPC_MOD_VER ")\n");
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sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
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TIPC_LOW_IMPORTANCE;
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sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
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TIPC_CRITICAL_IMPORTANCE;
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sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT;
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err = tipc_netlink_start();
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if (err)
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goto out_netlink;
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err = tipc_netlink_compat_start();
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if (err)
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goto out_netlink_compat;
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err = tipc_socket_init();
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if (err)
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goto out_socket;
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err = tipc_register_sysctl();
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if (err)
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goto out_sysctl;
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err = register_pernet_subsys(&tipc_net_ops);
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if (err)
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goto out_pernet;
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err = tipc_bearer_setup();
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if (err)
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goto out_bearer;
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pr_info("Started in single node mode\n");
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return 0;
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out_bearer:
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unregister_pernet_subsys(&tipc_net_ops);
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out_pernet:
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tipc_unregister_sysctl();
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out_sysctl:
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tipc_socket_stop();
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out_socket:
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tipc_netlink_compat_stop();
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out_netlink_compat:
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tipc_netlink_stop();
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out_netlink:
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pr_err("Unable to start in single node mode\n");
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return err;
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}
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static void __exit tipc_exit(void)
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{
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tipc_bearer_cleanup();
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unregister_pernet_subsys(&tipc_net_ops);
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tipc_netlink_stop();
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tipc_netlink_compat_stop();
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tipc_socket_stop();
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tipc_unregister_sysctl();
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pr_info("Deactivated\n");
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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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MODULE_VERSION(TIPC_MOD_VER);
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