[net-next,v2,0/4] net: gro: encapsulation bug fix and flush checks improvements

Message

Richard Gobert March 7, 2024, 1:21 p.m. UTC

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, inner_network_header is always set in the receive phase of GRO,
this is then leveraged in the next 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/[e-mail]/).

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/[e-mail]/

Richard Gobert (4):
  net: gro: add p_off param in *_gro_complete
  selftests/net: add local address bind in vxlan selftest
  net: gro: set inner_network_header in receive phase
  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                         | 33 ++++++----
 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                     |  9 ++-
 net/core/gro.c                            |  5 +-
 net/ethernet/eth.c                        |  5 +-
 net/ipv4/af_inet.c                        | 53 ++-------------
 net/ipv4/fou_core.c                       |  9 +--
 net/ipv4/gre_offload.c                    |  6 +-
 net/ipv4/tcp_offload.c                    | 80 ++++++++++++++++++-----
 net/ipv4/udp.c                            |  3 +-
 net/ipv4/udp_offload.c                    | 26 ++++----
 net/ipv6/ip6_offload.c                    | 45 +++++--------
 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, 188 insertions(+), 162 deletions(-)