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[NETNS]: Process ARP in the context of the correct namespace.

Browse source 
Get namespace from a device and pass it to the routing engine. Enable
ARP packet processing and device notifiers after that.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2008-03-24 15:28:12 -07:00 committed by David S. Miller
parent 2feb27dbe0
commit 49e8a279a1
1 changed files with 9 additions and 14 deletions
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23
net/ipv4/arp.c
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@ -242,7 +242,7 @@ static int arp_constructor(struct neighbour *neigh)
return -EINVAL;
}
neigh->type = inet_addr_type(&init_net, addr);
neigh->type = inet_addr_type(dev->nd_net, addr);
parms = in_dev->arp_parms;
__neigh_parms_put(neigh->parms);
@ -341,14 +341,14 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb)
switch (IN_DEV_ARP_ANNOUNCE(in_dev)) {
default:
case 0: /* By default announce any local IP */
if (skb && inet_addr_type(&init_net, ip_hdr(skb)->saddr) == RTN_LOCAL)
if (skb && inet_addr_type(dev->nd_net, ip_hdr(skb)->saddr) == RTN_LOCAL)
saddr = ip_hdr(skb)->saddr;
break;
case 1: /* Restrict announcements of saddr in same subnet */
if (!skb)
break;
saddr = ip_hdr(skb)->saddr;
if (inet_addr_type(&init_net, saddr) == RTN_LOCAL) {
if (inet_addr_type(dev->nd_net, saddr) == RTN_LOCAL) {
/* saddr should be known to target */
if (inet_addr_onlink(in_dev, target, saddr))
break;
@ -424,7 +424,7 @@ static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev)
int flag = 0;
/*unsigned long now; */
if (ip_route_output_key(&init_net, &rt, &fl) < 0)
if (ip_route_output_key(dev->nd_net, &rt, &fl) < 0)
return 1;
if (rt->u.dst.dev != dev) {
NET_INC_STATS_BH(LINUX_MIB_ARPFILTER);
@ -477,7 +477,7 @@ int arp_find(unsigned char *haddr, struct sk_buff *skb)
paddr = skb->rtable->rt_gateway;
if (arp_set_predefined(inet_addr_type(&init_net, paddr), haddr, paddr, dev))
if (arp_set_predefined(inet_addr_type(dev->nd_net, paddr), haddr, paddr, dev))
return 0;
n = __neigh_lookup(&arp_tbl, &paddr, dev, 1);
@ -709,6 +709,7 @@ static int arp_process(struct sk_buff *skb)
u16 dev_type = dev->type;
int addr_type;
struct neighbour *n;
struct net *net = dev->nd_net;
/* arp_rcv below verifies the ARP header and verifies the device
* is ARP'able.
@ -804,7 +805,7 @@ static int arp_process(struct sk_buff *skb)
/* Special case: IPv4 duplicate address detection packet (RFC2131) */
if (sip == 0) {
if (arp->ar_op == htons(ARPOP_REQUEST) &&
inet_addr_type(&init_net, tip) == RTN_LOCAL &&
inet_addr_type(net, tip) == RTN_LOCAL &&
!arp_ignore(in_dev, sip, tip))
arp_send(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
dev->dev_addr, sha);
@ -834,7 +835,7 @@ static int arp_process(struct sk_buff *skb)
goto out;
} else if (IN_DEV_FORWARD(in_dev)) {
if (addr_type == RTN_UNICAST && rt->u.dst.dev != dev &&
(arp_fwd_proxy(in_dev, rt) || pneigh_lookup(&arp_tbl, &init_net, &tip, dev, 0))) {
(arp_fwd_proxy(in_dev, rt) || pneigh_lookup(&arp_tbl, net, &tip, dev, 0))) {
n = neigh_event_ns(&arp_tbl, sha, &sip, dev);
if (n)
neigh_release(n);
@ -864,7 +865,7 @@ static int arp_process(struct sk_buff *skb)
*/
if (n == NULL &&
arp->ar_op == htons(ARPOP_REPLY) &&
inet_addr_type(&init_net, sip) == RTN_UNICAST)
inet_addr_type(net, sip) == RTN_UNICAST)
n = __neigh_lookup(&arp_tbl, &sip, dev, 1);
}
@ -911,9 +912,6 @@ static int arp_rcv(struct sk_buff *skb, struct net_device *dev,
{
struct arphdr *arp;
if (dev->nd_net != &init_net)
goto freeskb;
/* ARP header, plus 2 device addresses, plus 2 IP addresses. */
if (!pskb_may_pull(skb, arp_hdr_len(dev)))
goto freeskb;
@ -1198,9 +1196,6 @@ static int arp_netdev_event(struct notifier_block *this, unsigned long event, vo
{
struct net_device *dev = ptr;
if (dev->nd_net != &init_net)
return NOTIFY_DONE;
switch (event) {
case NETDEV_CHANGEADDR:
neigh_changeaddr(&arp_tbl, dev);