Commit b5c9641d authored by David Ahern's avatar David Ahern Committed by David S. Miller

net: devinet: Add support for RTM_DELNETCONF

Send RTM_DELNETCONF notifications when a device is deleted. The message only
needs the device index, so modify inet_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 3b022865
......@@ -1802,6 +1802,9 @@ static int inet_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,
IPV4_DEVCONF(*devconf, FORWARDING)) < 0)
......@@ -1823,6 +1826,7 @@ static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
IPV4_DEVCONF(*devconf, IGNORE_ROUTES_WITH_LINKDOWN)) < 0)
goto nla_put_failure;
out:
nlmsg_end(skb, nlh);
return 0;
......@@ -2276,16 +2280,18 @@ static int __devinet_sysctl_register(struct net *net, char *dev_name,
return -ENOBUFS;
}
static void __devinet_sysctl_unregister(struct ipv4_devconf *cnf)
static void __devinet_sysctl_unregister(struct net *net,
struct ipv4_devconf *cnf, int ifindex)
{
struct devinet_sysctl_table *t = cnf->sysctl;
if (!t)
return;
if (t) {
cnf->sysctl = NULL;
unregister_net_sysctl_table(t->sysctl_header);
kfree(t);
}
cnf->sysctl = NULL;
unregister_net_sysctl_table(t->sysctl_header);
kfree(t);
inet_netconf_notify_devconf(net, RTM_DELNETCONF, 0, ifindex, NULL);
}
static int devinet_sysctl_register(struct in_device *idev)
......@@ -2307,7 +2313,9 @@ static int devinet_sysctl_register(struct in_device *idev)
static void devinet_sysctl_unregister(struct in_device *idev)
{
__devinet_sysctl_unregister(&idev->cnf);
struct net *net = dev_net(idev->dev);
__devinet_sysctl_unregister(net, &idev->cnf, idev->dev->ifindex);
neigh_sysctl_unregister(idev->arp_parms);
}
......@@ -2382,9 +2390,9 @@ static __net_init int devinet_init_net(struct net *net)
#ifdef CONFIG_SYSCTL
err_reg_ctl:
__devinet_sysctl_unregister(dflt);
__devinet_sysctl_unregister(net, dflt, NETCONFA_IFINDEX_DEFAULT);
err_reg_dflt:
__devinet_sysctl_unregister(all);
__devinet_sysctl_unregister(net, all, NETCONFA_IFINDEX_ALL);
err_reg_all:
if (tbl != ctl_forward_entry)
kfree(tbl);
......@@ -2406,8 +2414,10 @@ static __net_exit void devinet_exit_net(struct net *net)
tbl = net->ipv4.forw_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv4.forw_hdr);
__devinet_sysctl_unregister(net->ipv4.devconf_dflt);
__devinet_sysctl_unregister(net->ipv4.devconf_all);
__devinet_sysctl_unregister(net, net->ipv4.devconf_dflt,
NETCONFA_IFINDEX_DEFAULT);
__devinet_sysctl_unregister(net, net->ipv4.devconf_all,
NETCONFA_IFINDEX_ALL);
kfree(tbl);
#endif
kfree(net->ipv4.devconf_dflt);
......
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