This patch set adds a new offload type to perform flow dissection for specific protocols (either by EtherType or by IP protocol). This is primary useful to crack open UDP encapsulations (like VXLAN, GUE) for the purposes of parsing the encapsulated packet.
Items in this patch set: - Constify skb argument to UDP lookup functions - Create new protocol case in __skb_dissect for ETH_P_TEB. This is based on the code in the GRE dissect function and the special handling in GRE can now be removed (it sets protocol to ETH_P_TEB and returns so goto proto_again is done) - Add infrastructure for protocol specific flow dissection offload - Add infrastructure to perform UDP flow dissection. Uses same model of GRO where a flow_dissect callback can be associated with a UDP socket - Use the infrastructure to support flow dissection of VXLAN and GUE Tested: Forced RPS to call flow dissection for VXLAN, FOU, and GUE. Observed that inner packet was being properly dissected. v2: Add signed off Tom Herbert (6): flow_dissector: Move ETH_P_TEB processing to main switch udp: Constify skb argument in lookup functions flow_dissector: Add protocol specific flow dissection offload udp: flow dissector offload fou: Support flow dissection vxlan: support flow dissect drivers/net/vxlan.c | 50 ++++++++++++ include/linux/netdevice.h | 7 ++ include/linux/udp.h | 8 ++ include/net/flow_dissector.h | 9 +++ include/net/ip.h | 2 +- include/net/sock_reuseport.h | 2 +- include/net/udp.h | 19 +++-- include/net/udp_tunnel.h | 8 ++ net/core/dev.c | 14 ++++ net/core/flow_dissector.c | 176 +++++++++++++++++++++++++++++-------------- net/core/sock_reuseport.c | 5 +- net/ipv4/fou.c | 63 ++++++++++++++++ net/ipv4/route.c | 4 +- net/ipv4/udp.c | 11 +-- net/ipv4/udp_offload.c | 45 +++++++++++ net/ipv4/udp_tunnel.c | 1 + net/ipv6/udp.c | 10 +-- net/ipv6/udp_offload.c | 13 ++++ 18 files changed, 369 insertions(+), 78 deletions(-) -- 2.11.0
