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[NETNS]: Drop packets in the non-initial namespace on the per/protocol basis.

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IP layer now can handle multiple namespaces normally. So, process such
packets normally and drop them only if the transport layer is not
aware about namespaces.

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 15:33:00 -07:00 • committed by David S. Miller
parent 0be43f82c4
commit f145049a06
2 changed files with 6 additions and 5 deletions
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3
include/net/protocol.h
View file

@ -39,7 +39,8 @@ struct net_protocol {
int (*gso_send_check)(struct sk_buff *skb); int (*gso_send_check)(struct sk_buff *skb);
struct sk_buff *(*gso_segment)(struct sk_buff *skb, struct sk_buff *(*gso_segment)(struct sk_buff *skb,
int features); int features);
int no_policy; unsigned int no_policy:1,
netns_ok:1;
}; };
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)

8
net/ipv4/ip_input.c
View file

@ -199,6 +199,8 @@ int ip_call_ra_chain(struct sk_buff *skb)
static int ip_local_deliver_finish(struct sk_buff *skb) static int ip_local_deliver_finish(struct sk_buff *skb)
{ {
struct net *net = skb->dev->nd_net;
__skb_pull(skb, ip_hdrlen(skb)); __skb_pull(skb, ip_hdrlen(skb));
/* Point into the IP datagram, just past the header. */ /* Point into the IP datagram, just past the header. */
@ -214,7 +216,8 @@ static int ip_local_deliver_finish(struct sk_buff *skb)
raw = raw_local_deliver(skb, protocol); raw = raw_local_deliver(skb, protocol);
hash = protocol & (MAX_INET_PROTOS - 1); hash = protocol & (MAX_INET_PROTOS - 1);
if ((ipprot = rcu_dereference(inet_protos[hash])) != NULL) { ipprot = rcu_dereference(inet_protos[hash]);
if (ipprot != NULL && (net == &init_net || ipprot->netns_ok)) {
int ret; int ret;
if (!ipprot->no_policy) { if (!ipprot->no_policy) {
@ -375,9 +378,6 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
struct iphdr *iph; struct iphdr *iph;
u32 len; u32 len;
if (dev->nd_net != &init_net)
goto drop;
/* When the interface is in promisc. mode, drop all the crap /* When the interface is in promisc. mode, drop all the crap
* that it receives, do not try to analyse it. * that it receives, do not try to analyse it.
*/ */