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ipv4: add a sock pointer to dst->output() path.

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In the dst->output() path for ipv4, the code assumes the skb it has to
transmit is attached to an inet socket, specifically via
ip_mc_output() : The sk_mc_loop() test triggers a WARN_ON() when the
provider of the packet is an AF_PACKET socket.

The dst->output() method gets an additional 'struct sock *sk'
parameter. This needs a cascade of changes so that this parameter can
be propagated from vxlan to final consumer.

Fixes: 8f646c922d ("vxlan: keep original skb ownership")
Reported-by: lucien xin <lucien.xin@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2014-04-15 13:47:15 -04:00
committed by David S. Miller
parent b0270e9101
commit aad88724c9
19 changed files with 74 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
net/ipv6/ip6_output.c
View File

@@ -132,7 +132,7 @@ static int ip6_finish_output(struct sk_buff *skb)
return ip6_finish_output2(skb);
}
int ip6_output(struct sk_buff *skb)
int ip6_output(struct sock *sk, struct sk_buff *skb)
{
struct net_device *dev = skb_dst(skb)->dev;
struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));

14
net/ipv6/route.c
View File

@@ -84,9 +84,9 @@ static void ip6_dst_ifdown(struct dst_entry *,
static int ip6_dst_gc(struct dst_ops *ops);
static int ip6_pkt_discard(struct sk_buff *skb);
static int ip6_pkt_discard_out(struct sk_buff *skb);
static int ip6_pkt_discard_out(struct sock *sk, struct sk_buff *skb);
static int ip6_pkt_prohibit(struct sk_buff *skb);
static int ip6_pkt_prohibit_out(struct sk_buff *skb);
static int ip6_pkt_prohibit_out(struct sock *sk, struct sk_buff *skb);
static void ip6_link_failure(struct sk_buff *skb);
static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb, u32 mtu);
@@ -290,7 +290,7 @@ static const struct rt6_info ip6_blk_hole_entry_template = {
.obsolete = DST_OBSOLETE_FORCE_CHK,
.error = -EINVAL,
.input = dst_discard,
.output = dst_discard,
.output = dst_discard_sk,
},
.rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
.rt6i_protocol = RTPROT_KERNEL,
@@ -1058,7 +1058,7 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
new->__use = 1;
new->input = dst_discard;
new->output = dst_discard;
new->output = dst_discard_sk;
if (dst_metrics_read_only(&ort->dst))
new->_metrics = ort->dst._metrics;
@@ -1577,7 +1577,7 @@ int ip6_route_add(struct fib6_config *cfg)
switch (cfg->fc_type) {
case RTN_BLACKHOLE:
rt->dst.error = -EINVAL;
rt->dst.output = dst_discard;
rt->dst.output = dst_discard_sk;
rt->dst.input = dst_discard;
break;
case RTN_PROHIBIT:
@@ -2129,7 +2129,7 @@ static int ip6_pkt_discard(struct sk_buff *skb)
return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES);
}
static int ip6_pkt_discard_out(struct sk_buff *skb)
static int ip6_pkt_discard_out(struct sock *sk, struct sk_buff *skb)
{
skb->dev = skb_dst(skb)->dev;
return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
@@ -2140,7 +2140,7 @@ static int ip6_pkt_prohibit(struct sk_buff *skb)
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
}
static int ip6_pkt_prohibit_out(struct sk_buff *skb)
static int ip6_pkt_prohibit_out(struct sock *sk, struct sk_buff *skb)
{
skb->dev = skb_dst(skb)->dev;
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);

5
net/ipv6/sit.c
View File

@@ -974,8 +974,9 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
goto out;
}
err = iptunnel_xmit(rt, skb, fl4.saddr, fl4.daddr, IPPROTO_IPV6, tos,
ttl, df, !net_eq(tunnel->net, dev_net(dev)));
err = iptunnel_xmit(skb->sk, rt, skb, fl4.saddr, fl4.daddr,
IPPROTO_IPV6, tos, ttl, df,
!net_eq(tunnel->net, dev_net(dev)));
iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
return NETDEV_TX_OK;

2
net/ipv6/xfrm6_output.c
View File

@@ -163,7 +163,7 @@ static int __xfrm6_output(struct sk_buff *skb)
return x->outer_mode->afinfo->output_finish(skb);
}
int xfrm6_output(struct sk_buff *skb)
int xfrm6_output(struct sock *sk, struct sk_buff *skb)
{
return NF_HOOK(NFPROTO_IPV6, NF_INET_POST_ROUTING, skb, NULL,
skb_dst(skb)->dev, __xfrm6_output);