This patch set adds GRO functions (gro_receive and gro_complete) to UDP sockets and removes udp_offload infrastructure.
Add GRO functions (gro_receive and gro_complete) to UDP sockets. In udp_gro_receive and udp_gro_complete a socket lookup is done instead of looking up the port number in udp_offloads. If a socket is found and there are GRO functions for it then those are called. This feature allows binding GRO functions to more than just a port number. Eventually, we will be able to use this technique to allow application defined GRO for an application protocol by attaching BPF porgrams to UDP sockets for doing GRO. In order to implement these functions, we added exported udp6_lib_lookup_skb and udp4_lib_lookup_skb functions in ipv4/udp.c and ipv6/udp.c. Also, inet_iif and references to skb_dst() were changed to check that dst is set in skbuf before derefencing. In the GRO path there is now a UDP socket lookup performed before dst is set, to the get the device in that case we simply use skb->dev. Tested: Ran various combinations of VXLAN and GUE TCP_STREAM and TCP_RR tests. Did not see any material regression. Tom Herbert (8): net: Checks skb_dst to be NULL in inet_iif udp: Add udp6_lib_lookup_skb and udp4_lib_lookup_skb udp: Add GRO functions to UDP socket udp: Add socket based GRO and config vxlan: change vxlan to use UDP socket GRO fou: change to use UDP socket GRO geneve: change to use UDP socket GRO udp: Remove udp_offloads drivers/net/geneve.c | 28 ++++-------- drivers/net/vxlan.c | 30 ++++-------- include/linux/netdevice.h | 17 ------- include/linux/udp.h | 8 ++++ include/net/protocol.h | 3 -- include/net/route.h | 7 +-- include/net/udp.h | 11 ++++- include/net/udp_tunnel.h | 7 +++ include/net/vxlan.h | 1 - net/ipv4/fou.c | 48 +++++++------------- net/ipv4/udp.c | 13 ++++++ net/ipv4/udp_offload.c | 113 ++++++++-------------------------------------- net/ipv4/udp_tunnel.c | 2 + net/ipv6/Makefile | 5 +- net/ipv6/af_inet6.c | 8 ++++ net/ipv6/ip6_offload.c | 2 - net/ipv6/ip6_offload.h | 3 +- net/ipv6/udp.c | 13 ++++++ net/ipv6/udp_offload.c | 11 +++-- 19 files changed, 129 insertions(+), 201 deletions(-) -- 2.8.0.rc2
