netdev - Re: [PATCH net 2/2] selftests: rtnetlink: add a bond test trying to enslave non-eth dev

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Date:   Mon, 13 Mar 2023 15:32:25 +0200
From:   Nikolay Aleksandrov <razor@...ckwall.org>
To:     netdev@...r.kernel.org
Cc:     syoshida@...hat.com, j.vosburgh@...il.com, andy@...yhouse.net,
        kuba@...nel.org, davem@...emloft.net, pabeni@...hat.com,
        edumazet@...gle.com,
        syzbot+9dfc3f3348729cc82277@...kaller.appspotmail.com
Subject: Re: [PATCH net 2/2] selftests: rtnetlink: add a bond test trying to
 enslave non-eth dev

On 13/03/2023 15:28, Nikolay Aleksandrov wrote:
[snip]
> +kci_test_enslaved_bond_non_eth()
> +{
> +	local ret=0
> +
> +	ip link add name test-nlmon0 type nlmon
> +	ip link add name test-bond0 type bond
> +	ip link add name test-bond1 type bond
> +	ip link set dev test-bond0 master test-bond1
> +	ip link set dev test-nlmon0 master test-bond0 1>/dev/null 2>/dev/null
> +
> +	ip -d l sh dev test-bond0 | grep -q "SLAVE"
> +	if [ $? -ne 0 ]; then
> +		echo "FAIL: IFF_SLAVE flag is missing from the bond device"
> +		check_err 1
> +	fi
> +	ip -d l sh dev test-bond0 | grep -q "MASTER"
> +	if [ $? -ne 0 ]; then
> +		echo "FAIL: IFF_MASTER flag is missing from the bond device"
> +		check_err 1
> +	fi
> +
> +	# on error we return before cleaning up as that may hang the system

I wasn't sure if this part was ok, let me know if you prefer to always attempt cleaning up
and I'll send v2 moving the return after the cleanup attempt.

> +	if [ $ret -ne 0 ]; then
> +		return 1
> +	fi
> +
> +	# clean up any leftovers
> +	ip link del dev test-bond0
> +	ip link del dev test-bond1
> +	ip link del dev test-nlmon0
> +
> +	echo "PASS: enslaved bond device has flags restored properly"
> +}
> +
>  kci_test_rtnl()
>  {
>  	local ret=0
> @@ -1276,6 +1310,8 @@ kci_test_rtnl()
>  	check_err $?
>  	kci_test_bridge_parent_id
>  	check_err $?
> +	kci_test_enslaved_bond_non_eth
> +	check_err $?
>  
>  	kci_del_dummy
>  	return $ret