Commit 23452170 authored by David Ahern's avatar David Ahern Committed by David S. Miller
Browse files

net: ipv6: Add support for RTM_DELNETCONF 



Send RTM_DELNETCONF notifications when a device is deleted. The message only
needs the device index, so modify inet6_netconf_fill_devconf to skip devconf
references if it is NULL.

Allows a userspace cache to remove entries as devices are deleted.

Signed-off-by: default avatarDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 85b3daad

net/ipv6/addrconf.c

+15 −5
Original line number Diff line number Diff line
@@ -549,6 +549,9 @@ static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, 
	if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)

		goto nla_put_failure;



	if (!devconf)

		goto out;



	if ((all || type == NETCONFA_FORWARDING) &&

	    nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)

		goto nla_put_failure;
@@ -567,6 +570,7 @@ static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, 
			devconf->ignore_routes_with_linkdown) < 0)

		goto nla_put_failure;



out:

	nlmsg_end(skb, nlh);

	return 0;
@@ -6368,7 +6372,8 @@ out: 
	return -ENOBUFS;

}



static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)

static void __addrconf_sysctl_unregister(struct net *net,

					 struct ipv6_devconf *p, int ifindex)

{

	struct ctl_table *table;
@@ -6379,6 +6384,8 @@ static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) 
	unregister_net_sysctl_table(p->sysctl_header);

	p->sysctl_header = NULL;

	kfree(table);



	inet6_netconf_notify_devconf(net, RTM_DELNETCONF, 0, ifindex, NULL);

}



static int addrconf_sysctl_register(struct inet6_dev *idev)
@@ -6402,7 +6409,8 @@ static int addrconf_sysctl_register(struct inet6_dev *idev) 


static void addrconf_sysctl_unregister(struct inet6_dev *idev)

{

	__addrconf_sysctl_unregister(&idev->cnf);

	__addrconf_sysctl_unregister(dev_net(idev->dev), &idev->cnf,

				     idev->dev->ifindex);

	neigh_sysctl_unregister(idev->nd_parms);

}
@@ -6445,7 +6453,7 @@ static int __net_init addrconf_init_net(struct net *net) 


#ifdef CONFIG_SYSCTL

err_reg_dflt:

	__addrconf_sysctl_unregister(all);

	__addrconf_sysctl_unregister(net, all, NETCONFA_IFINDEX_ALL);

err_reg_all:

	kfree(dflt);

#endif
@@ -6458,8 +6466,10 @@ err_alloc_all: 
static void __net_exit addrconf_exit_net(struct net *net)

{

#ifdef CONFIG_SYSCTL

	__addrconf_sysctl_unregister(net->ipv6.devconf_dflt);

	__addrconf_sysctl_unregister(net->ipv6.devconf_all);

	__addrconf_sysctl_unregister(net, net->ipv6.devconf_dflt,

				     NETCONFA_IFINDEX_DEFAULT);

	__addrconf_sysctl_unregister(net, net->ipv6.devconf_all,

				     NETCONFA_IFINDEX_ALL);

#endif

	kfree(net->ipv6.devconf_dflt);

	kfree(net->ipv6.devconf_all);

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