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selftests/xsk: reset NIC settings to default after running test suite

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Currently, when running ZC test suite, after finishing first run of test
suite and then switching to busy-poll tests within xskxceiver, such
errors are observed:

libbpf: Kernel error message: ice: MTU is too large for linear frames and XDP prog does not support frags
1..26
libbpf: Kernel error message: Native and generic XDP can't be active at the same time
Error attaching XDP program
not ok 1 [xskxceiver.c:xsk_reattach_xdp:1568]: ERROR: 17/"File exists"

this is because test suite ends with 9k MTU and native xdp program being
loaded. Busy-poll tests start non-multi-buffer tests for generic mode.
To fix this, let us introduce bash function that will reset NIC settings
to default (e.g. 1500 MTU and no xdp progs loaded) so that test suite
can continue without interrupts. It also means that after busy-poll
tests NIC will have those default settings, whereas right now it is left
with 9k MTU and xdp prog loaded in native mode.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/20230719132421.584801-25-maciej.fijalkowski@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Maciej Fijalkowski 2023-07-19 15:24:21 +02:00 committed by Alexei Starovoitov
parent 807bf4da20
commit 3666bccab4
2 changed files with 12 additions and 0 deletions
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5
tools/testing/selftests/bpf/test_xsk.sh
View file

@ -171,7 +171,10 @@ exec_xskxceiver
if [ -z $ETH ]; then
cleanup_exit ${VETH0} ${VETH1}
else
cleanup_iface ${ETH} ${MTU}
fi
TEST_NAME="XSK_SELFTESTS_${VETH0}_BUSY_POLL"
busy_poll=1
@ -184,6 +187,8 @@ exec_xskxceiver
if [ -z $ETH ]; then
cleanup_exit ${VETH0} ${VETH1}
else
cleanup_iface ${ETH} ${MTU}
fi
failures=0

7
tools/testing/selftests/bpf/xsk_prereqs.sh
View file

@ -53,6 +53,13 @@ test_exit()
exit 1
}
cleanup_iface()
{
ip link set $1 mtu $2
ip link set $1 xdp off
ip link set $1 xdpgeneric off
}
clear_configs()
{
[ $(ip link show $1 &>/dev/null; echo $?;) == 0 ] &&