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authorDavid Ahern <dsahern@gmail.com>2018-07-19 12:41:18 -0700
committerDavid S. Miller <davem@davemloft.net>2018-07-21 19:31:46 -0700
commit24b711edfc34bc45777a3f068812b7d1ed004a5d (patch)
treef0a625917ab8381322b5bcdc271eaa8a26323002 /include
parentf95de8aa9f824d96421cb7ca81552b4ad8768a31 (diff)
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net/ipv6: Fix linklocal to global address with VRF
Example setup: host: ip -6 addr add dev eth1 2001:db8:104::4 where eth1 is enslaved to a VRF switch: ip -6 ro add 2001:db8:104::4/128 dev br1 where br1 only has an LLA ping6 2001:db8:104::4 ssh 2001:db8:104::4 (NOTE: UDP works fine if the PKTINFO has the address set to the global address and ifindex is set to the index of eth1 with a destination an LLA). For ICMP, icmp6_iif needs to be updated to check if skb->dev is an L3 master. If it is then return the ifindex from rt6i_idev similar to what is done for loopback. For TCP, restore the original tcp_v6_iif definition which is needed in most places and add a new tcp_v6_iif_l3_slave that considers the l3_slave variability. This latter check is only needed for socket lookups. Fixes: 9ff74384600a ("net: vrf: Handle ipv6 multicast and link-local addresses") Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/tcp.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 25116ec02087..cd3ecda9386a 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -841,6 +841,11 @@ static inline void bpf_compute_data_end_sk_skb(struct sk_buff *skb)
*/
static inline int tcp_v6_iif(const struct sk_buff *skb)
{
+ return TCP_SKB_CB(skb)->header.h6.iif;
+}
+
+static inline int tcp_v6_iif_l3_slave(const struct sk_buff *skb)
+{
bool l3_slave = ipv6_l3mdev_skb(TCP_SKB_CB(skb)->header.h6.flags);
return l3_slave ? skb->skb_iif : TCP_SKB_CB(skb)->header.h6.iif;