linux-kernel - [PATCH net-next v4 0/4] net: gro: encapsulation bug fix and flush checks improvements

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Date: Mon, 25 Mar 2024 19:25:39 +0100
From: Richard Gobert <richardbgobert@...il.com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	willemdebruijn.kernel@...il.com,
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	petrm@...dia.com,
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	b.galvani@...il.com,
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	horms@...nel.org,
	linyunsheng@...wei.com,
	richardbgobert@...il.com,
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	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org
Subject: [PATCH net-next v4 0/4] 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 pass p_off parameter in *_gro_complete.

Next, the fields network_offset and inner_network_offset are added to
napi_gro_cb, and are both set during the receive phase of GRO. This is then
leveraged in the next commit to remove flush_id 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/).

v3 -> v4:
 - Fix code comment and commit message typos
 - v3:
   https://lore.kernel.org/all/f939c84a-2322-4393-a5b0-9b1e0be8ed8e@gmail.com/

v2 -> v3:
 - Use napi_gro_cb instead of skb->{offset}
 - v2:
   https://lore.kernel.org/netdev/2ce1600b-e733-448b-91ac-9d0ae2b866a4@gmail.com/

v1 -> v2:
 - Pass p_off in *_gro_complete to fix UDP bug
 - Remove more conditionals and memory fetches from inet_gro_flush
 - v1:
   https://lore.kernel.org/netdev/e1d22505-c5f8-4c02-a997-64248480338b@gmail.com/

Richard Gobert (4):
  net: gro: add p_off param in *_gro_complete
  selftests/net: add local address bind in vxlan selftest
  net: gro: add {inner_}network_offset to napi_gro_cb
  net: gro: move L3 flush checks to tcp_gro_receive

 drivers/net/geneve.c                      |  7 +-
 drivers/net/vxlan/vxlan_core.c            | 11 ++--
 include/linux/etherdevice.h               |  2 +-
 include/linux/netdevice.h                 |  3 +-
 include/linux/udp.h                       |  2 +-
 include/net/gro.h                         | 36 +++++++----
 include/net/inet_common.h                 |  2 +-
 include/net/tcp.h                         |  6 +-
 include/net/udp.h                         |  8 +--
 include/net/udp_tunnel.h                  |  2 +-
 net/8021q/vlan_core.c                     |  6 +-
 net/core/gro.c                            |  6 +-
 net/ethernet/eth.c                        |  5 +-
 net/ipv4/af_inet.c                        | 49 ++------------
 net/ipv4/fou_core.c                       |  9 +--
 net/ipv4/gre_offload.c                    |  6 +-
 net/ipv4/tcp_offload.c                    | 79 ++++++++++++++++++-----
 net/ipv4/udp.c                            |  3 +-
 net/ipv4/udp_offload.c                    | 26 ++++----
 net/ipv6/ip6_offload.c                    | 41 +++++-------
 net/ipv6/tcpv6_offload.c                  |  7 +-
 net/ipv6/udp.c                            |  3 +-
 net/ipv6/udp_offload.c                    | 13 ++--
 tools/testing/selftests/net/udpgro_fwd.sh | 10 ++-
 24 files changed, 187 insertions(+), 155 deletions(-)

-- 
2.36.1