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Code Issues Releases Wiki Activity

vxlan: tun_id is 64bit, not 32bit

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The tun_id field in struct ip_tunnel_key is __be64, not __be32. We need to
convert the vni to tun_id correctly.

Fixes: 54bfd872bf ("vxlan: keep flags and vni in network byte order")
Reported-by: Paolo Abeni <pabeni@redhat.com>
Tested-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Thadeu Lima de Souza Cascardo <cascardo@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Benc 2016-02-18 19:19:29 +01:00 committed by David S. Miller
parent f169af2cdc
commit 07dabf20d9
2 changed files with 12 additions and 2 deletions
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5
drivers/net/vxlan.c
View file

@ -1310,9 +1310,10 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
goto drop;
if (vxlan_collect_metadata(vs)) {
__be32 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);
tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
vxlan_vni(vxlan_hdr(skb)->vx_vni),
sizeof(*md));
vxlan_vni_to_tun_id(vni), sizeof(*md));
if (!tun_dst)
goto drop;

9
include/net/vxlan.h
View file

@ -294,6 +294,15 @@ static inline __be32 vxlan_tun_id_to_vni(__be64 tun_id)
#endif
}
static inline __be64 vxlan_vni_to_tun_id(__be32 vni)
{
#if defined(__BIG_ENDIAN)
return (__be64)vni;
#else
return (__be64)vni << 32;
#endif
}
static inline size_t vxlan_rco_start(__be32 vni_field)
{
return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;