From nobody Tue Apr 7 02:56:17 2026 Received: from mail-yw1-f170.google.com (mail-yw1-f170.google.com [209.85.128.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1FCF935F5F3 for ; Mon, 16 Mar 2026 22:29:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.170 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773700171; cv=none; b=qxtnmv7ZtSpG5Yt42timI9iNDFqlxtBdMpG+s/N+0Oi0eNQutjAn4hzLq8W/SmBDle46yRipJNQlxoIgwhhV5/GvukkRLMFcSJJmNy2f5yNsLl6JHhihd65bIwAO15EAhhRpFMJ8YhMFF4/X10hr72KqFz085iJJY1KUWTP0SVM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773700171; c=relaxed/simple; bh=QLmJCoIEgk7bY1Etv2KHuHMRxJlYbMdrmYRAb1O/174=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Fs5I74ZBzV1iRbdGdQhmdMgthVUBh7/cOvBCtfqZADDlcqHM9BEVieo31ObXiGDylWVSyEZ1NiOcmW2fQM2UlosLR1DcuYhENH5kr+TRswgiEBRIQiv9NYtk/WWn3zx0uVfJqCOt5stpU0hPoHy4S+J0+6GhK353kekRwjLjBPQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=YU+4+DAK; arc=none smtp.client-ip=209.85.128.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YU+4+DAK" Received: by mail-yw1-f170.google.com with SMTP id 00721157ae682-79a5ad7cc52so10949577b3.2 for ; Mon, 16 Mar 2026 15:29:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1773700166; x=1774304966; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=zGghREiBSn7MQCKj4TXr4KN+77lBvMCqoaCeBo9lJNY=; b=YU+4+DAKS0Xi1+S5LfgawBzAiOjfnQ1zadUoqKwnE3T0oo5zVn6j0chqDn4W514zX6 IC7f0HDP/i5HIxgtJH44lVAe1THefFbTdXDB94DGKX2+FGi5NAjMUvYrDaMRocJfQ7Ua rcdkGczSUqXVgFN63quPo5fSowPBOzLFf4zUQWPv5eRYskXogfjkO+3ID5n+0ZciyBdU NWPflAKJ/hxEZjDKEn0p6zchzprqfIUm5EgK2kTqUmPG/ItIU5PGXMYYLa9JefgNsIQ4 sbyMQdxlg8A5HK0E5Ku5Edg/z9DDrvH/95Yea0efpZ09SXHRBcAsw0uzfr1MvO1N4+4b uxPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773700166; x=1774304966; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=zGghREiBSn7MQCKj4TXr4KN+77lBvMCqoaCeBo9lJNY=; b=KIsM9JlYfxCZvNjonhQ5oADqD9WGX5gO8p/1E7HfpRR1TehAJtbtMoR/mBQ8ErvO67 emca9jeTXWDFf3koF37oPnTJ/z7utn4k5+ErHl7ioUjn3XI8Rn5vqAgzXAAKP503adG6 H5THSInKnTB7r/q+pFPZ7sB+bgLVcVW5mA1jhPwgcOS64HM9Kw6/RVh0XbjuErFHnJko zsd9UqC4f7dJYpPbqDpIIWt1vNM3vKL+Pt4fZ8QzrOx3xAwOFq2h87NmFnMe+bLSvfZz opCPimBCz8cIdboryL5S/na4Hvw3LGDMUVTwgQ3O6MrsMlzy4z4pR8FWwNHqdEwTRghr TlEg== X-Forwarded-Encrypted: i=1; AJvYcCUnn3ZPV4Dyirr6FKRScxAzZ0TsLBmzGc/DE+ZApDWSgDrNOL2gX8i1yowS9pljyylau6bvqaSjtnj5Hcg=@vger.kernel.org X-Gm-Message-State: AOJu0YwAalnDPTyS2AdkXC4KPDwUaqRXgQPLr+lVbOrwqIBMzkhrW7Jx 7ZzhlB+7UEtyu/A5gOx7npLC5Oxag7MH94zjWL9raMrq05xf4Anz1okO X-Gm-Gg: ATEYQzz7qqRXLwlYMFq0pSOrZKMngaKsMDXBoI0Yr3McIFErE6JDUk33KNeITKfPDkh h07+rw7ejtaRl9pQbjUcQenQ5dJ72pugyG/3jksw9KxBq4ZYypwDpuyFnMzbH0XFMla1sNfeVhe mkYDh4Fe+zwpR3Ggjec79VIBgJQv13FvfUl+82Db7+7ZqjTL+55itNFKbcfWEiGp9nOZ10EvPtE a4ljJkE6HGzcCMJ+4RGVZv/Y7M5qswPgdPktSagthe3Ll4zhYRBc/tBthkkYnDCAlVnMOf1hekr f+rwmfOKkdwNKTo8Thpv2lLoimXdB4cKZljhvdOv2ecLV3Ppu8NopVtaw6/Nxru6SrQnD2NL1lc 3dqvGitz+uK5YqbW9Nvav+rt2j+K87M681amkOezj8O4vc9wEzXloXrxfRXh1ivHhPcmr+XurwH eNaRXm0z1WQ3m1kPrxEUQaIQ== X-Received: by 2002:a05:690c:f08:b0:796:6da9:bf97 with SMTP id 00721157ae682-79a1c1c002emr149829567b3.43.1773700165699; Mon, 16 Mar 2026 15:29:25 -0700 (PDT) Received: from localhost ([2a03:2880:25ff:5b::]) by smtp.gmail.com with ESMTPSA id 00721157ae682-79917ee5757sm96813787b3.31.2026.03.16.15.29.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Mar 2026 15:29:25 -0700 (PDT) From: Bobby Eshleman Date: Mon, 16 Mar 2026 15:29:17 -0700 Subject: [PATCH net-next 6/6] selftests: drv-net: add netkit devmem TX test 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-Transfer-Encoding: quoted-printable Message-Id: <20260316-scratch-bobbyeshleman-tcp-dm-netkit5-v1-6-b53c8cd72b23@meta.com> References: <20260316-scratch-bobbyeshleman-tcp-dm-netkit5-v1-0-b53c8cd72b23@meta.com> In-Reply-To: <20260316-scratch-bobbyeshleman-tcp-dm-netkit5-v1-0-b53c8cd72b23@meta.com> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Andrew Lunn , Shuah Khan Cc: 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 X-Mailer: b4 0.14.3 From: Bobby Eshleman Extend the netkit devmem selftest with a TX test case. The TX path uses the primary RX redirect BPF program to redirect traffic from the primary netkit ingress to the physical NIC via bpf_redirect_neigh(). The actual TX path looks like the following: TX Path ------- Netkit Guest (netns) Netkit Host Physical NIC Remote | | | | |--- TCP send --------->| | | |--- BPF redirect --->| | |---- transmit ----->| dmabuf Signed-off-by: Bobby Eshleman --- .../testing/selftests/drivers/net/hw/nk_devmem.py | 23 ++++++++++++++++++= ++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/drivers/net/hw/nk_devmem.py b/tools/te= sting/selftests/drivers/net/hw/nk_devmem.py index 0a66ff85db9d..0e3c5aab6423 100755 --- a/tools/testing/selftests/drivers/net/hw/nk_devmem.py +++ b/tools/testing/selftests/drivers/net/hw/nk_devmem.py @@ -89,14 +89,33 @@ def test_devmem(cfg) -> None: ksft_eq(ncdevmem_rx.ret, 0) =20 =20 +def test_devmem_tx(cfg) -> None: + """Test devmem TX: send from netkit guest, receive on remote.""" + configure_nic(cfg) + + socat =3D f"socat -U - TCP6-LISTEN:{cfg.port},reuseaddr" + tx_cmd =3D (f"ip netns exec {cfg.netns.name} bash -c" + f" 'echo test_devmem_tx | {cfg.bin_local}" + f" -f {cfg._nk_guest_ifname} -s {cfg.remote_addr_v['6']}" + f" -p {cfg.port} -t 0 -q 1 -n'") + + with bkg(socat, host=3Dcfg.remote, exit_wait=3DTrue) as receiver: + wait_port_listen(cfg.port, proto=3D"tcp", host=3Dcfg.remote) + cmd(tx_cmd, shell=3DTrue) + + ksft_eq(receiver.ret, 0) + ksft_eq(receiver.stdout.strip(), "test_devmem_tx") + + def main() -> None: """Run netkit devmem tests.""" - with NetDrvContEnv(__file__, rxqueues=3D2) as cfg: + with NetDrvContEnv(__file__, rxqueues=3D2, + primary_rx_redirect=3DTrue) as cfg: cfg.bin_local =3D path.abspath( path.dirname(__file__) + "/ncdevmem" ) cfg.port =3D rand_port() - ksft_run([test_devmem], args=3D(cfg,)) + ksft_run([test_devmem, test_devmem_tx], args=3D(cfg,)) ksft_exit() =20 =20 --=20 2.52.0