netdev - Re: [PATCH net-next v2] net: netconsole: selftests: Create a new netconsole selftest

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Message-ID: <Zr25OecANx77Y+4O@gmail.com>
Date: Thu, 15 Aug 2024 01:15:53 -0700
From: Breno Leitao <leitao@...ian.org>
To: Hangbin Liu <liuhangbin@...il.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, Shuah Khan <shuah@...nel.org>,
	netdev@...r.kernel.org, David Wei <dw@...idwei.uk>,
	Willem de Bruijn <willemb@...gle.com>,
	Petr Machata <petrm@...dia.com>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH net-next v2] net: netconsole: selftests: Create a new
 netconsole selftest

On Thu, Aug 15, 2024 at 03:56:36PM +0800, Hangbin Liu wrote:
> On Tue, Aug 13, 2024 at 11:38:16AM -0700, Breno Leitao wrote:
> > Adds a selftest that creates two virtual interfaces, assigns one to a
> > new namespace, and assigns IP addresses to both.
> > 
> > It listens on the destination interface using socat and configures a
> > dynamic target on netconsole, pointing to the destination IP address.
> > 
> > The test then checks if the message was received properly on the
> > destination interface.
> > 
> > Signed-off-by: Breno Leitao <leitao@...ian.org>
> > ---
> > Changelog:
> > 
> > v2:
> >  * Change the location of the path (Jakub)
> >  * Move from veth to netdevsim
> >  * Other small changes in dependency checks and cleanup
> > 
> > v1:
> >  * https://lore.kernel.org/all/ZqyUHN770pjSofTC@gmail.com/
> > 
> >  MAINTAINERS                                   |   1 +
> >  tools/testing/selftests/drivers/net/Makefile  |   1 +
> >  .../selftests/drivers/net/netcons_basic.sh    | 223 ++++++++++++++++++
> >  3 files changed, 225 insertions(+)
> >  create mode 100755 tools/testing/selftests/drivers/net/netcons_basic.sh
> > 
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index a9dace908305..ded45f1dff7e 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -15770,6 +15770,7 @@ M:	Breno Leitao <leitao@...ian.org>
> >  S:	Maintained
> >  F:	Documentation/networking/netconsole.rst
> >  F:	drivers/net/netconsole.c
> > +F:	tools/testing/selftests/drivers/net/netcons_basic.sh
> >  
> >  NETDEVSIM
> >  M:	Jakub Kicinski <kuba@...nel.org>
> > diff --git a/tools/testing/selftests/drivers/net/Makefile b/tools/testing/selftests/drivers/net/Makefile
> > index e54f382bcb02..928530b26abc 100644
> > --- a/tools/testing/selftests/drivers/net/Makefile
> > +++ b/tools/testing/selftests/drivers/net/Makefile
> > @@ -3,6 +3,7 @@
> >  TEST_INCLUDES := $(wildcard lib/py/*.py)
> >  
> >  TEST_PROGS := \
> > +	netcons_basic.sh \
> >  	ping.py \
> >  	queues.py \
> >  	stats.py \
> > diff --git a/tools/testing/selftests/drivers/net/netcons_basic.sh b/tools/testing/selftests/drivers/net/netcons_basic.sh
> > new file mode 100755
> > index 000000000000..e0e58fc7e89f
> > --- /dev/null
> > +++ b/tools/testing/selftests/drivers/net/netcons_basic.sh
> > @@ -0,0 +1,223 @@
> > +#!/usr/bin/env bash
> > +# SPDX-License-Identifier: GPL-2.0
> > +
> > +# This test creates two netdevsim virtual interfaces, assigns one of them (the
> > +# "destination interface") to a new namespace, and assigns IP addresses to both
> > +# interfaces.
> > +#
> > +# It listens on the destination interface using socat and configures a dynamic
> > +# target on netconsole, pointing to the destination IP address.
> > +#
> > +# Finally, it checks whether the message was received properly on the
> > +# destination interface.  Note that this test may pollute the kernel log buffer
> > +# (dmesg) and relies on dynamic configuration and namespaces being configured.
> > +#
> > +# Author: Breno Leitao <leitao@...ian.org>
> > +
> > +set -euo pipefail
> > +
> > +SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")
> > +
> > +# Simple script to test dynamic targets in netconsole
> > +SRCIF="" # to be populated later
> > +SRCIP=192.168.1.1
> > +DSTIF="" # to be populated later
> > +DSTIP=192.168.1.2
> > +
> > +PORT="6666"
> > +MSG="netconsole selftest"
> > +TARGET=$(mktemp -u netcons_XXXXX)
> > +NETCONS_CONFIGFS="/sys/kernel/config/netconsole"
> > +NETCONS_PATH="${NETCONS_CONFIGFS}"/"${TARGET}"
> > +# This will have some tmp values appended to it in set_network()
> > +NAMESPACE="netconsns_dst"
> > +
> > +# IDs for netdevsim
> > +NSIM_DEV_1_ID=$((256 + RANDOM % 256))
> > +NSIM_DEV_2_ID=$((512 + RANDOM % 256))
> > +
> > +# Used to create and delete namespaces
> > +source "${SCRIPTDIR}"/../../net/lib.sh
> 
> If you want to source net/lib.sh, you need to add it to Makefile. e.g.
> 
> TEST_INCLUDES := ../../../net/lib.sh
> 
> See example in tools/testing/selftests/drivers/net/bonding/Makefile

Thanks. I will update.
--breno