netdev - [PATCH net-next 0/3] net: gro: encapsulation bug fix and flush checks improvements

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Date: Thu, 22 Feb 2024 22:00:42 +0100
From: Richard Gobert <richardbgobert@...il.com>
To: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, dsahern@...nel.org, shuah@...nel.org,
 liujian56@...wei.com, horms@...nel.org, aleksander.lobakin@...el.com,
 richardbgobert@...il.com, linyunsheng@...wei.com, therbert@...gle.com,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org
Subject: [PATCH net-next 0/3] net: gro: encapsulation bug fix and flush checks
 improvements

This series fixes a bug in the complete phase of UDP in GRO, in which
socket lookup fails due to using network_header when parsing encapsulated
packets. The fix is to keep track of both outer and inner offsets.

The last commit leverages the first commit to remove some state from
napi_gro_cb, and stateful code in {ipv6,inet}_gro_receive which may be
unnecessarily complicated due to encapsulation support in GRO.

In addition, udpgro_fwd selftest is adjusted to include the socket lookup
case for vxlan. This selftest will test its supposed functionality once
local bind support is merged (https://lore.kernel.org/netdev/df300a49-7811-4126-a56a-a77100c8841b@gmail.com/).

Richard Gobert (3):
  net: gro: set {inner_,}network_header in receive phase
  selftests/net: add local address bind in vxlan selftest
  net: gro: move L3 flush checks to tcp_gro_receive

 include/net/gro.h                         | 23 ++++---
 net/8021q/vlan_core.c                     |  3 +
 net/core/gro.c                            |  3 -
 net/ipv4/af_inet.c                        | 44 ++------------
 net/ipv4/tcp_offload.c                    | 73 ++++++++++++++++++-----
 net/ipv4/udp_offload.c                    |  2 +-
 net/ipv6/ip6_offload.c                    | 22 ++-----
 net/ipv6/tcpv6_offload.c                  |  2 +-
 net/ipv6/udp_offload.c                    |  2 +-
 tools/testing/selftests/net/udpgro_fwd.sh | 10 +++-
 10 files changed, 97 insertions(+), 87 deletions(-)

-- 
2.36.1