be94cfdb99
Basically, dev_ifsioc() operates on the passed single netns (except for netdev notifier chains with lower/upper devices for which we will need more changes). Let's hold rtnl_net_lock() for dev_ifsioc(). Now that NETDEV_CHANGENAME is always triggered under rtnl_net_lock() of the device's netns. (do_setlink() and dev_ifsioc()) Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20250115095545.52709-4-kuniyu@amazon.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
116 lines
2.8 KiB
C
116 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/* Copyright Amazon.com Inc. or its affiliates. */
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <net/net_namespace.h>
|
|
#include <net/netns/generic.h>
|
|
|
|
static int rtnl_net_debug_event(struct notifier_block *nb,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
|
struct net *net = dev_net(dev);
|
|
enum netdev_cmd cmd = event;
|
|
|
|
/* Keep enum and don't add default to trigger -Werror=switch */
|
|
switch (cmd) {
|
|
case NETDEV_UP:
|
|
case NETDEV_DOWN:
|
|
case NETDEV_REBOOT:
|
|
case NETDEV_CHANGE:
|
|
case NETDEV_REGISTER:
|
|
case NETDEV_UNREGISTER:
|
|
case NETDEV_CHANGEMTU:
|
|
case NETDEV_CHANGEADDR:
|
|
case NETDEV_PRE_CHANGEADDR:
|
|
case NETDEV_GOING_DOWN:
|
|
case NETDEV_FEAT_CHANGE:
|
|
case NETDEV_BONDING_FAILOVER:
|
|
case NETDEV_PRE_UP:
|
|
case NETDEV_PRE_TYPE_CHANGE:
|
|
case NETDEV_POST_TYPE_CHANGE:
|
|
case NETDEV_POST_INIT:
|
|
case NETDEV_PRE_UNINIT:
|
|
case NETDEV_RELEASE:
|
|
case NETDEV_NOTIFY_PEERS:
|
|
case NETDEV_JOIN:
|
|
case NETDEV_CHANGEUPPER:
|
|
case NETDEV_RESEND_IGMP:
|
|
case NETDEV_PRECHANGEMTU:
|
|
case NETDEV_CHANGEINFODATA:
|
|
case NETDEV_BONDING_INFO:
|
|
case NETDEV_PRECHANGEUPPER:
|
|
case NETDEV_CHANGELOWERSTATE:
|
|
case NETDEV_UDP_TUNNEL_PUSH_INFO:
|
|
case NETDEV_UDP_TUNNEL_DROP_INFO:
|
|
case NETDEV_CHANGE_TX_QUEUE_LEN:
|
|
case NETDEV_CVLAN_FILTER_PUSH_INFO:
|
|
case NETDEV_CVLAN_FILTER_DROP_INFO:
|
|
case NETDEV_SVLAN_FILTER_PUSH_INFO:
|
|
case NETDEV_SVLAN_FILTER_DROP_INFO:
|
|
case NETDEV_OFFLOAD_XSTATS_ENABLE:
|
|
case NETDEV_OFFLOAD_XSTATS_DISABLE:
|
|
case NETDEV_OFFLOAD_XSTATS_REPORT_USED:
|
|
case NETDEV_OFFLOAD_XSTATS_REPORT_DELTA:
|
|
case NETDEV_XDP_FEAT_CHANGE:
|
|
ASSERT_RTNL();
|
|
break;
|
|
|
|
case NETDEV_CHANGENAME:
|
|
ASSERT_RTNL_NET(net);
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int rtnl_net_debug_net_id;
|
|
|
|
static int __net_init rtnl_net_debug_net_init(struct net *net)
|
|
{
|
|
struct notifier_block *nb;
|
|
|
|
nb = net_generic(net, rtnl_net_debug_net_id);
|
|
nb->notifier_call = rtnl_net_debug_event;
|
|
|
|
return register_netdevice_notifier_net(net, nb);
|
|
}
|
|
|
|
static void __net_exit rtnl_net_debug_net_exit(struct net *net)
|
|
{
|
|
struct notifier_block *nb;
|
|
|
|
nb = net_generic(net, rtnl_net_debug_net_id);
|
|
unregister_netdevice_notifier_net(net, nb);
|
|
}
|
|
|
|
static struct pernet_operations rtnl_net_debug_net_ops __net_initdata = {
|
|
.init = rtnl_net_debug_net_init,
|
|
.exit = rtnl_net_debug_net_exit,
|
|
.id = &rtnl_net_debug_net_id,
|
|
.size = sizeof(struct notifier_block),
|
|
};
|
|
|
|
static struct notifier_block rtnl_net_debug_block = {
|
|
.notifier_call = rtnl_net_debug_event,
|
|
};
|
|
|
|
static int __init rtnl_net_debug_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = register_pernet_device(&rtnl_net_debug_net_ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = register_netdevice_notifier(&rtnl_net_debug_block);
|
|
if (ret)
|
|
unregister_pernet_subsys(&rtnl_net_debug_net_ops);
|
|
|
|
return ret;
|
|
}
|
|
|
|
subsys_initcall(rtnl_net_debug_init);
|