netdev - Re: [PATCH net-next v8 16/16] selftests/net: Add netkit container tests

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Message-ID: <aYP2EO8RANz+zCJi@devvm11784.nha0.facebook.com>
Date: Wed, 4 Feb 2026 17:44:48 -0800
From: Bobby Eshleman <bobbyeshleman@...il.com>
To: Daniel Borkmann <daniel@...earbox.net>
Cc: netdev@...r.kernel.org, bpf@...r.kernel.org, kuba@...nel.org,
	davem@...emloft.net, razor@...ckwall.org, pabeni@...hat.com,
	willemb@...gle.com, sdf@...ichev.me, john.fastabend@...il.com,
	martin.lau@...nel.org, jordan@...fe.io,
	maciej.fijalkowski@...el.com, magnus.karlsson@...el.com,
	dw@...idwei.uk, toke@...hat.com, yangzhenze@...edance.com,
	wangdongdong.6@...edance.com
Subject: Re: [PATCH net-next v8 16/16] selftests/net: Add netkit container
 tests

On Thu, Jan 29, 2026 at 11:28:30PM +0100, Daniel Borkmann wrote:
> From: David Wei <dw@...idwei.uk>
> 
> Add two tests using NetDrvContEnv. One basic test that sets up a netkit
> pair, with one end in a netns. Use LOCAL_PREFIX_V6 and nk_forward BPF
> program to ping from a remote host to the netkit in netns.
> 
> Second is a selftest for netkit queue leasing, using io_uring zero copy
> test binary inside of a netns with netkit. This checks that memory
> providers can be bound against virtual queues in a netkit within a
> netns that are leasing from a physical netdev in the default netns.
> 
> Signed-off-by: David Wei <dw@...idwei.uk>
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
> ---
>  .../testing/selftests/drivers/net/hw/Makefile |  2 +
>  .../selftests/drivers/net/hw/nk_netns.py      | 23 +++++
>  .../selftests/drivers/net/hw/nk_qlease.py     | 90 +++++++++++++++++++
>  3 files changed, 115 insertions(+)
>  create mode 100755 tools/testing/selftests/drivers/net/hw/nk_netns.py
>  create mode 100755 tools/testing/selftests/drivers/net/hw/nk_qlease.py
> 
> diff --git a/tools/testing/selftests/drivers/net/hw/Makefile b/tools/testing/selftests/drivers/net/hw/Makefile
> index 9c163ba6feee..39ad86d693b3 100644
> --- a/tools/testing/selftests/drivers/net/hw/Makefile
> +++ b/tools/testing/selftests/drivers/net/hw/Makefile
> @@ -32,6 +32,8 @@ TEST_PROGS = \
>  	irq.py \
>  	loopback.sh \
>  	nic_timestamp.py \
> +	nk_netns.py \
> +	nk_qlease.py \
>  	pp_alloc_fail.py \
>  	rss_api.py \
>  	rss_ctx.py \

I think we might also need something like:

diff --git a/tools/testing/selftests/drivers/net/hw/config b/tools/testing/selftests/drivers/net/hw/config
index 2307aa001be1..334be5027a7c 100644
--- a/tools/testing/selftests/drivers/net/hw/config
+++ b/tools/testing/selftests/drivers/net/hw/config
@@ -5,6 +5,7 @@ CONFIG_FUNCTION_ERROR_INJECTION=y
 CONFIG_IO_URING=y
 CONFIG_IPV6=y
 CONFIG_IPV6_GRE=y
+CONFIG_NETKIT=y
 CONFIG_NET_IPGRE=y
 CONFIG_NET_IPGRE_DEMUX=y
 CONFIG_UDMABUF=y


Best,
Bobby