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selftests/net: add csum offload test

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Test NIC hardware checksum offload:

- Rx + Tx
- IPv4 + IPv6
- TCP + UDP

Optional features:

- zero checksum 0xFFFF
- checksum disable 0x0000
- transport encap headers
- randomization

See file header for detailed comments.

Expected results differ depending on NIC features:

- CHECKSUM_UNNECESSARY vs CHECKSUM_COMPLETE
- NETIF_F_HW_CSUM (csum_start/csum_off) vs NETIF_F_IP(V6)_CSUM

Signed-off-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20221128140210.553391-1-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Willem de Bruijn
2022-11-28 09:02:10 -05:00
committed by Jakub Kicinski
parent 5cb0c51fe3
commit 91a7de8560
3 changed files with 988 additions and 0 deletions
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1
tools/testing/selftests/net/.gitignore vendored
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@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
bind_bhash
csum
cmsg_sender
fin_ack_lat
gro

1
tools/testing/selftests/net/Makefile
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@@ -74,6 +74,7 @@ TEST_PROGS += test_ingress_egress_chaining.sh
TEST_GEN_PROGS += so_incoming_cpu
TEST_PROGS += sctp_vrf.sh
TEST_GEN_FILES += sctp_hello
TEST_GEN_FILES += csum
TEST_FILES := settings

986
tools/testing/selftests/net/csum.c Normal file
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