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[76.102.12.149]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2c0e55a489bsm4388531eec.23.2026.03.18.07.59.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Mar 2026 07:59:58 -0700 (PDT) Date: Wed, 18 Mar 2026 07:59:57 -0700 From: Stanislav Fomichev To: Bobby Eshleman Cc: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Andrew Lunn , Shuah Khan , Stanislav Fomichev , Mina Almasry , Wei Wang , David Wei , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, bpf@vger.kernel.org, Bobby Eshleman Subject: Re: [PATCH net-next 5/6] selftests: drv-net: add netkit devmem RX test Message-ID: References: <20260316-scratch-bobbyeshleman-tcp-dm-netkit5-v1-0-b53c8cd72b23@meta.com> <20260316-scratch-bobbyeshleman-tcp-dm-netkit5-v1-5-b53c8cd72b23@meta.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On 03/17, Bobby Eshleman wrote: > On Tue, Mar 17, 2026 at 05:08:20PM -0700, Stanislav Fomichev wrote: > > On 03/16, Bobby Eshleman wrote: > > > From: Bobby Eshleman > > > > > > Add tests for devmem RX over a netkit device with a leased queue. This > > > is the same as the other devmem RX test except for ncdevmem executes in > > > a namespace, binds to a netkit, and skips the ethtool NIC configuration > > > steps (relying on the test runner for that setup). > > > > > > The RX path is setup as the following: > > > > > > RX Path > > > ------- > > > > > > Remote Physical NIC Netkit Host Netkit Guest (netns) > > > | | | | > > > |--- TCP send ------>| | | > > > |-------------------->| | > > > dmabuf |--- BPF redirect -->| > > > > > > > Is it too messy to parametrize the existing test to run both with and > > without the namespaces? Feels like should be somewhat doable in python? > > IIUC, we could have main() do something like: > > for env [NetDrvContEnv, NetDrvEpEnv]: > with env as cfg: > [...] > ksft_run(tests, args=(cfg,)) > > > And then the tests could call helpers that check cfg.netns to use the > nk_{guest,host}_ip6 addresses when true, otherwise use the regular > addresses? > > It should be doable if I'm following your drift. Yeah, yeah, this plus some small changes here and there (to pass your new -n in the netns mode for example).