mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 02:23:16 +00:00
6c9081a391
Since node internal messages are passed directly to the socket, it is not possible to observe those messages via tcpdump or wireshark. We now remedy this by making it possible to clone such messages and send the clones to the loopback interface. The clones are dropped at reception and have no functional role except making the traffic visible. The feature is enabled if network taps are active for the loopback device. pcap filtering restrictions require the messages to be presented to the receiving side of the loopback device. v3 - Function dev_nit_active used to check for network taps. - Procedure netif_rx_ni used to send cloned messages to loopback device. Signed-off-by: John Rutherford <john.rutherford@dektech.com.au> Acked-by: Jon Maloy <jon.maloy@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
196 lines
5.0 KiB
C
196 lines
5.0 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#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 <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;
|
|
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);
|
|
|
|
err = tipc_sk_rht_init(net);
|
|
if (err)
|
|
goto out_sk_rht;
|
|
|
|
err = tipc_nametbl_init(net);
|
|
if (err)
|
|
goto out_nametbl;
|
|
|
|
INIT_LIST_HEAD(&tn->dist_queue);
|
|
|
|
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:
|
|
return err;
|
|
}
|
|
|
|
static void __net_exit tipc_exit_net(struct net *net)
|
|
{
|
|
tipc_detach_loopback(net);
|
|
tipc_net_stop(net);
|
|
tipc_bcast_stop(net);
|
|
tipc_nametbl_stop(net);
|
|
tipc_sk_rht_destroy(net);
|
|
}
|
|
|
|
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_netlink_start();
|
|
if (err)
|
|
goto out_netlink;
|
|
|
|
err = tipc_netlink_compat_start();
|
|
if (err)
|
|
goto out_netlink_compat;
|
|
|
|
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 = tipc_bearer_setup();
|
|
if (err)
|
|
goto out_bearer;
|
|
|
|
pr_info("Started in single node mode\n");
|
|
return 0;
|
|
out_bearer:
|
|
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:
|
|
tipc_netlink_compat_stop();
|
|
out_netlink_compat:
|
|
tipc_netlink_stop();
|
|
out_netlink:
|
|
pr_err("Unable to start in single node mode\n");
|
|
return err;
|
|
}
|
|
|
|
static void __exit tipc_exit(void)
|
|
{
|
|
tipc_bearer_cleanup();
|
|
unregister_pernet_device(&tipc_topsrv_net_ops);
|
|
tipc_socket_stop();
|
|
unregister_pernet_device(&tipc_net_ops);
|
|
tipc_netlink_stop();
|
|
tipc_netlink_compat_stop();
|
|
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);
|