Re: [PATCH net v3 1/2] selftests: include bonding tests into the kselftest infra

[Hangbin Liu <liuhangbin@gmail.com>]

On Mon, Aug 15, 2022 at 11:08:34AM -0400, Jonathan Toppins wrote:
> This creates a test collection in drivers/net/bonding for bonding
> specific kernel selftests.
> 
> The first test is a reproducer that provisions a bond and given the
> specific order in how the ip-link(8) commands are issued the bond never
> transmits an LACPDU frame on any of its slaves.
> 
> Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
> ---
> 
> Notes:
>     v2:
>      * fully integrated the test into the kselftests infrastructure
>      * moved the reproducer to under
>        tools/testing/selftests/drivers/net/bonding
>      * reduced the test to its minimial amount and used ip-link(8) for
>        all bond interface configuration
>     v3:
>      * rebase to latest net/master
>      * remove `#set -x` requested by Hangbin
> 
>  MAINTAINERS                                   |  1 +
>  tools/testing/selftests/Makefile              |  1 +
>  .../selftests/drivers/net/bonding/Makefile    |  6 ++
>  .../net/bonding/bond-break-lacpdu-tx.sh       | 81 +++++++++++++++++++
>  .../selftests/drivers/net/bonding/config      |  1 +
>  .../selftests/drivers/net/bonding/settings    |  1 +
>  6 files changed, 91 insertions(+)
>  create mode 100644 tools/testing/selftests/drivers/net/bonding/Makefile
>  create mode 100755 tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh
>  create mode 100644 tools/testing/selftests/drivers/net/bonding/config
>  create mode 100644 tools/testing/selftests/drivers/net/bonding/settings
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index f2d64020399b..e5fb14dc302d 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -3672,6 +3672,7 @@ F:	Documentation/networking/bonding.rst
>  F:	drivers/net/bonding/
>  F:	include/net/bond*
>  F:	include/uapi/linux/if_bonding.h
> +F:	tools/testing/selftests/net/bonding/
>  
>  BOSCH SENSORTEC BMA400 ACCELEROMETER IIO DRIVER
>  M:	Dan Robertson <dan@dlrobertson.com>
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index 10b34bb03bc1..c2064a35688b 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -12,6 +12,7 @@ TARGETS += cpu-hotplug
>  TARGETS += damon
>  TARGETS += drivers/dma-buf
>  TARGETS += drivers/s390x/uvdevice
> +TARGETS += drivers/net/bonding
>  TARGETS += efivarfs
>  TARGETS += exec
>  TARGETS += filesystems
> diff --git a/tools/testing/selftests/drivers/net/bonding/Makefile b/tools/testing/selftests/drivers/net/bonding/Makefile
> new file mode 100644
> index 000000000000..ab6c54b12098
> --- /dev/null
> +++ b/tools/testing/selftests/drivers/net/bonding/Makefile
> @@ -0,0 +1,6 @@
> +# SPDX-License-Identifier: GPL-2.0
> +# Makefile for net selftests
> +
> +TEST_PROGS := bond-break-lacpdu-tx.sh
> +
> +include ../../../lib.mk
> diff --git a/tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh b/tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh
> new file mode 100755
> index 000000000000..47ab90596acb
> --- /dev/null
> +++ b/tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh
> @@ -0,0 +1,81 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +
> +# Regression Test:
> +#   Verify LACPDUs get transmitted after setting the MAC address of
> +#   the bond.
> +#
> +# https://bugzilla.redhat.com/show_bug.cgi?id=2020773
> +#
> +#       +---------+
> +#       | fab-br0 |
> +#       +---------+
> +#            |
> +#       +---------+
> +#       |  fbond  |
> +#       +---------+
> +#        |       |
> +#    +------+ +------+
> +#    |veth1 | |veth2 |
> +#    +------+ +------+
> +#
> +# We use veths instead of physical interfaces
> +
> +set -e
> +tmp=$(mktemp -q dump.XXXXXX)
> +cleanup() {
> +	ip link del fab-br0 >/dev/null 2>&1 || :
> +	ip link del fbond  >/dev/null 2>&1 || :
> +	ip link del veth1-bond  >/dev/null 2>&1 || :
> +	ip link del veth2-bond  >/dev/null 2>&1 || :
> +	modprobe -r bonding  >/dev/null 2>&1 || :
> +	rm -f -- ${tmp}
> +}
> +
> +trap cleanup 0 1 2
> +cleanup
> +sleep 1
> +
> +# create the bridge
> +ip link add fab-br0 address 52:54:00:3B:7C:A6 mtu 1500 type bridge \
> +	forward_delay 15
> +
> +# create the bond
> +ip link add fbond type bond mode 4 miimon 200 xmit_hash_policy 1 \
> +	ad_actor_sys_prio 65535 lacp_rate fast
> +
> +# set bond address
> +ip link set fbond address 52:54:00:3B:7C:A6
> +ip link set fbond up
> +
> +# set again bond sysfs parameters
> +ip link set fbond type bond ad_actor_sys_prio 65535
> +
> +# create veths
> +ip link add name veth1-bond type veth peer name veth1-end
> +ip link add name veth2-bond type veth peer name veth2-end
> +
> +# add ports
> +ip link set fbond master fab-br0
> +ip link set veth1-bond down master fbond
> +ip link set veth2-bond down master fbond
> +
> +# bring up
> +ip link set veth1-end up
> +ip link set veth2-end up
> +ip link set fab-br0 up
> +ip link set fbond up
> +ip addr add dev fab-br0 10.0.0.3
> +
> +tcpdump -n -i veth1-end -e ether proto 0x8809 >${tmp} 2>&1 &
> +sleep 15
> +pkill tcpdump >/dev/null 2>&1
> +rc=0
> +num=$(grep "packets captured" ${tmp} | awk '{print $1}')
> +if test "$num" -gt 0; then
> +	echo "PASS, captured ${num}"
> +else
> +	echo "FAIL"
> +	rc=1
> +fi
> +exit $rc
> diff --git a/tools/testing/selftests/drivers/net/bonding/config b/tools/testing/selftests/drivers/net/bonding/config
> new file mode 100644
> index 000000000000..dc1c22de3c92
> --- /dev/null
> +++ b/tools/testing/selftests/drivers/net/bonding/config
> @@ -0,0 +1 @@
> +CONFIG_BONDING=y
> diff --git a/tools/testing/selftests/drivers/net/bonding/settings b/tools/testing/selftests/drivers/net/bonding/settings
> new file mode 100644
> index 000000000000..867e118223cd
> --- /dev/null
> +++ b/tools/testing/selftests/drivers/net/bonding/settings
> @@ -0,0 +1 @@
> +timeout=60
> -- 
> 2.31.1
> 

Acked-by: Hangbin Liu <liuhangbin@gmail.com>