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netconf: add proxy-arp support

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Add support to netconf to show changes to proxy-arp status on a per
interface basis via netlink in a manner similar to forwarding
and reverse path state.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2013-12-12 13:06:50 -08:00 committed by David S. Miller
parent 6853605360
commit f085ff1c13
2 changed files with 30 additions and 12 deletions
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1
include/uapi/linux/netconf.h
View File

@ -14,6 +14,7 @@ enum {
NETCONFA_FORWARDING,
NETCONFA_RP_FILTER,
NETCONFA_MC_FORWARDING,
NETCONFA_PROXY_ARP,
__NETCONFA_MAX
};
#define NETCONFA_MAX (__NETCONFA_MAX - 1)

41
net/ipv4/devinet.c
View File

@ -1696,6 +1696,8 @@ static int inet_netconf_msgsize_devconf(int type)
size += nla_total_size(4);
if (type == -1 || type == NETCONFA_MC_FORWARDING)
size += nla_total_size(4);
if (type == -1 || type == NETCONFA_PROXY_ARP)
size += nla_total_size(4);
return size;
}
@ -1732,6 +1734,10 @@ static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
nla_put_s32(skb, NETCONFA_MC_FORWARDING,
IPV4_DEVCONF(*devconf, MC_FORWARDING)) < 0)
goto nla_put_failure;
if ((type == -1 || type == NETCONFA_PROXY_ARP) &&
nla_put_s32(skb, NETCONFA_PROXY_ARP,
IPV4_DEVCONF(*devconf, PROXY_ARP)) < 0)
goto nla_put_failure;
return nlmsg_end(skb, nlh);
@ -1769,6 +1775,7 @@ static const struct nla_policy devconf_ipv4_policy[NETCONFA_MAX+1] = {
[NETCONFA_IFINDEX] = { .len = sizeof(int) },
[NETCONFA_FORWARDING] = { .len = sizeof(int) },
[NETCONFA_RP_FILTER] = { .len = sizeof(int) },
[NETCONFA_PROXY_ARP] = { .len = sizeof(int) },
};
static int inet_netconf_get_devconf(struct sk_buff *in_skb,
@ -1950,6 +1957,19 @@ static void inet_forward_change(struct net *net)
}
}
static int devinet_conf_ifindex(struct net *net, struct ipv4_devconf *cnf)
{
if (cnf == net->ipv4.devconf_dflt)
return NETCONFA_IFINDEX_DEFAULT;
else if (cnf == net->ipv4.devconf_all)
return NETCONFA_IFINDEX_ALL;
else {
struct in_device *idev
= container_of(cnf, struct in_device, cnf);
return idev->dev->ifindex;
}
}
static int devinet_conf_proc(struct ctl_table *ctl, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos)
@ -1962,6 +1982,7 @@ static int devinet_conf_proc(struct ctl_table *ctl, int write,
struct ipv4_devconf *cnf = ctl->extra1;
struct net *net = ctl->extra2;
int i = (int *)ctl->data - cnf->data;
int ifindex;
set_bit(i, cnf->state);
@ -1971,23 +1992,19 @@ static int devinet_conf_proc(struct ctl_table *ctl, int write,
i == IPV4_DEVCONF_ROUTE_LOCALNET - 1)
if ((new_value == 0) && (old_value != 0))
rt_cache_flush(net);
if (i == IPV4_DEVCONF_RP_FILTER - 1 &&
new_value != old_value) {
int ifindex;
if (cnf == net->ipv4.devconf_dflt)
ifindex = NETCONFA_IFINDEX_DEFAULT;
else if (cnf == net->ipv4.devconf_all)
ifindex = NETCONFA_IFINDEX_ALL;
else {
struct in_device *idev =
container_of(cnf, struct in_device,
cnf);
ifindex = idev->dev->ifindex;
}
ifindex = devinet_conf_ifindex(net, cnf);
inet_netconf_notify_devconf(net, NETCONFA_RP_FILTER,
ifindex, cnf);
}
if (i == IPV4_DEVCONF_PROXY_ARP - 1 &&
new_value != old_value) {
ifindex = devinet_conf_ifindex(net, cnf);
inet_netconf_notify_devconf(net, NETCONFA_PROXY_ARP,
ifindex, cnf);
}
}
return ret;