From patchwork Mon Nov 6 14:35:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13447017 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1B5F728E27 for ; Mon, 6 Nov 2023 14:36:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from smtp-fw-6002.amazon.com (smtp-fw-6002.amazon.com [52.95.49.90]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1781BB for ; Mon, 6 Nov 2023 06:36:14 -0800 (PST) X-IronPort-AV: E=Sophos;i="6.03,281,1694736000"; d="scan'208";a="366329806" Received: from iad12-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-iad-1e-m6i4x-b538c141.us-east-1.amazon.com) ([10.43.8.6]) by smtp-border-fw-6002.iad6.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Nov 2023 14:36:14 +0000 Received: from smtpout.prod.us-west-2.prod.farcaster.email.amazon.dev (iad7-ws-svc-p70-lb3-vlan2.iad.amazon.com [10.32.235.34]) by email-inbound-relay-iad-1e-m6i4x-b538c141.us-east-1.amazon.com (Postfix) with ESMTPS id AAC23A2579; Mon, 6 Nov 2023 14:36:05 +0000 (UTC) Received: from EX19MTAUWB002.ant.amazon.com [10.0.21.151:16675] by smtpin.naws.us-west-2.prod.farcaster.email.amazon.dev [10.0.28.94:2525] with esmtp (Farcaster) id deb27e6d-8725-48a3-a146-4d3938248c61; Mon, 6 Nov 2023 14:36:05 +0000 (UTC) X-Farcaster-Flow-ID: deb27e6d-8725-48a3-a146-4d3938248c61 Received: from EX19EXOUWC001.ant.amazon.com (10.250.64.135) by EX19MTAUWB002.ant.amazon.com (10.250.64.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.39; Mon, 6 Nov 2023 14:35:49 +0000 Received: from EX19MTAUWB001.ant.amazon.com (10.250.64.248) by EX19EXOUWC001.ant.amazon.com (10.250.64.135) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.27; Mon, 6 Nov 2023 14:35:48 +0000 Received: from u3832b3a9db3152.ant.amazon.com (10.106.83.6) by mail-relay.amazon.com (10.250.64.254) with Microsoft SMTP Server id 15.2.1118.39 via Frontend Transport; Mon, 6 Nov 2023 14:35:45 +0000 From: David Woodhouse To: CC: Kevin Wolf , Hanna Reitz , "Peter Maydell" , Stefano Stabellini , Anthony Perard , "Paul Durrant" , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Paolo Bonzini , "Richard Henderson" , Eduardo Habkost , "Michael S. Tsirkin" , "Marcel Apfelbaum" , Jason Wang , Marcelo Tosatti , , , Subject: [PATCH v4 11/17] hw/xen: only remove peers of PCI NICs on unplug Date: Mon, 6 Nov 2023 14:35:01 +0000 Message-ID: <20231106143507.1060610-12-dwmw2@infradead.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231106143507.1060610-1-dwmw2@infradead.org> References: <20231106143507.1060610-1-dwmw2@infradead.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Precedence: Bulk From: David Woodhouse When the Xen guest asks to unplug *emulated* NICs, it's kind of unhelpful also to unplug the peer of the *Xen* PV NIC. Signed-off-by: David Woodhouse Reviewed-by: Paul Durrant --- hw/i386/xen/xen_platform.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/hw/i386/xen/xen_platform.c b/hw/i386/xen/xen_platform.c index 17457ff3de..e2dd1b536a 100644 --- a/hw/i386/xen/xen_platform.c +++ b/hw/i386/xen/xen_platform.c @@ -140,9 +140,14 @@ static void unplug_nic(PCIBus *b, PCIDevice *d, void *o) /* Remove the peer of the NIC device. Normally, this would be a tap device. */ static void del_nic_peer(NICState *nic, void *opaque) { - NetClientState *nc; + NetClientState *nc = qemu_get_queue(nic); + ObjectClass *klass = module_object_class_by_name(nc->model); + + /* Only delete peers of PCI NICs that we're about to delete */ + if (!klass || !object_class_dynamic_cast(klass, TYPE_PCI_DEVICE)) { + return; + } - nc = qemu_get_queue(nic); if (nc->peer) qemu_del_net_client(nc->peer); }