We have observed that hardware NIC drivers may have faulty AF_XDP
implementations, and there seem to be a lack of a test of various modes
in which AF_XDP could run. This series adds a test to verify that NIC
drivers implements many AF_XDP features by performing a send / receive
of a single UDP packet.
I put the C code of the test under selftests/bpf because I'm not really
sure how I'd build the BPF-related code without the selftests/bpf
build infrastructure.
Tested on Google Cloud, with GVE:
$ sudo NETIF=ens4 REMOTE_TYPE=ssh \
REMOTE_ARGS="root@10.138.15.235" \
LOCAL_V4="10.138.15.234" \
REMOTE_V4="10.138.15.235" \
LOCAL_NEXTHOP_MAC="42:01:0a:8a:00:01" \
REMOTE_NEXTHOP_MAC="42:01:0a:8a:00:01" \
python3 xsk_hw.py
KTAP version 1
1..22
ok 1 xsk_hw.ipv4_basic
ok 2 xsk_hw.ipv4_tx_skb_copy
ok 3 xsk_hw.ipv4_tx_skb_copy_force_attach
ok 4 xsk_hw.ipv4_rx_skb_copy
ok 5 xsk_hw.ipv4_tx_drv_copy
ok 6 xsk_hw.ipv4_tx_drv_copy_force_attach
ok 7 xsk_hw.ipv4_rx_drv_copy
[...]
# Exception| STDERR: b'/tmp/zzfhcqkg/pbgodkgjxsk_hw: recv_pfpacket: Timeout\n'
not ok 8 xsk_hw.ipv4_tx_drv_zerocopy
ok 9 xsk_hw.ipv4_tx_drv_zerocopy_force_attach
ok 10 xsk_hw.ipv4_rx_drv_zerocopy
[...]
# Exception| STDERR: b'/tmp/zzfhcqkg/pbgodkgjxsk_hw: connect sync client: max_retries\n'
[...]
# Exception| STDERR: b'/linux/tools/testing/selftests/bpf/xsk_hw: open_xsk: Device or resource busy\n'
not ok 11 xsk_hw.ipv4_rx_drv_zerocopy_fill_after_bind
ok 12 xsk_hw.ipv6_basic # SKIP Test requires IPv6 connectivity
[...]
ok 22 xsk_hw.ipv6_rx_drv_zerocopy_fill_after_bind # SKIP Test requires IPv6 connectivity
# Totals: pass:9 fail:2 xfail:0 xpass:0 skip:11 error:0
YiFei Zhu (3):
selftests/bpf: Move rxq_num helper from xdp_hw_metadata to
network_helpers
selftests/bpf: Add xsk_hw AF_XDP functionality test
selftests: drv-net: Add xsk_hw AF_XDP functionality test
tools/testing/selftests/bpf/.gitignore | 1 +
tools/testing/selftests/bpf/Makefile | 7 +-
tools/testing/selftests/bpf/network_helpers.c | 27 +
tools/testing/selftests/bpf/network_helpers.h | 16 +
tools/testing/selftests/bpf/progs/xsk_hw.c | 72 ++
tools/testing/selftests/bpf/xdp_hw_metadata.c | 27 +-
tools/testing/selftests/bpf/xsk_hw.c | 844 ++++++++++++++++++
.../testing/selftests/drivers/net/hw/Makefile | 1 +
.../selftests/drivers/net/hw/xsk_hw.py | 133 +++
9 files changed, 1102 insertions(+), 26 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/xsk_hw.c
create mode 100644 tools/testing/selftests/bpf/xsk_hw.c
create mode 100755 tools/testing/selftests/drivers/net/hw/xsk_hw.py
--
2.45.2.505.gda0bf45e8d-goog
