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vxlan: stop checking CSUM_ENCAP_VXLAN when converting inner CSUM flags into normal, for decapsulation.

Browse source 
The packet, if processed at this point, was already parsed to be UDP
directed to a vxlan port.

Connect-X 4+ does not provide easy method to infer which parser
processed the packet, so driver cannot set the flag without a lot of
efforts which are only to satisfy the formal requirements.

Reviewed by:	bryanv, np
Sponsored by:	Mellanox Technologies/NVidia Networking
Differential revision:	https://reviews.freebsd.org/D27449
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2020-12-21 18:59:26 +02:00
parent 2ac1c19272
commit 994e47023a
1 changed files with 1 additions and 2 deletions
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3
sys/net/if_vxlan.c
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@ -2824,8 +2824,7 @@ vxlan_input(struct vxlan_socket *vso, uint32_t vni, struct mbuf **m0,
m_clrprotoflags(m);
m->m_pkthdr.rcvif = ifp;
M_SETFIB(m, ifp->if_fib);
if (m->m_pkthdr.csum_flags & CSUM_ENCAP_VXLAN &&
((ifp->if_capenable & IFCAP_RXCSUM &&
if (((ifp->if_capenable & IFCAP_RXCSUM &&
m->m_pkthdr.csum_flags & CSUM_INNER_L3_CALC) ||
(ifp->if_capenable & IFCAP_RXCSUM_IPV6 &&
!(m->m_pkthdr.csum_flags & CSUM_INNER_L3_CALC)))) {