From patchwork Thu Feb 5 00:18:22 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Williamson X-Patchwork-Id: 5540 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n150LJl2006430 for ; Thu, 5 Feb 2009 00:21:19 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753020AbZBEAVS (ORCPT ); Wed, 4 Feb 2009 19:21:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752392AbZBEAVS (ORCPT ); Wed, 4 Feb 2009 19:21:18 -0500 Received: from g5t0009.atlanta.hp.com ([15.192.0.46]:17696 "EHLO g5t0009.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753020AbZBEAVR (ORCPT ); Wed, 4 Feb 2009 19:21:17 -0500 Received: from g4t0009.houston.hp.com (g4t0009.houston.hp.com [16.234.32.26]) by g5t0009.atlanta.hp.com (Postfix) with ESMTP id B0889308B2; Thu, 5 Feb 2009 00:21:16 +0000 (UTC) Received: from ldl.fc.hp.com (ldl.fc.hp.com [15.11.146.30]) by g4t0009.houston.hp.com (Postfix) with ESMTP id 841A9C0DD; Thu, 5 Feb 2009 00:21:16 +0000 (UTC) Received: from localhost (ldl.fc.hp.com [127.0.0.1]) by ldl.fc.hp.com (Postfix) with ESMTP id 4487539C06F; Wed, 4 Feb 2009 17:21:16 -0700 (MST) X-Virus-Scanned: Debian amavisd-new at ldl.fc.hp.com Received: from ldl.fc.hp.com ([127.0.0.1]) by localhost (ldl.fc.hp.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pUL+rWAu7SHV; Wed, 4 Feb 2009 17:21:14 -0700 (MST) Received: from kvm.aw (lart.fc.hp.com [15.11.146.31]) by ldl.fc.hp.com (Postfix) with ESMTP id 7EBED39C00E; Wed, 4 Feb 2009 17:21:14 -0700 (MST) From: Alex Williamson Subject: [PATCH v3 6/8] qemu:virtio-net: Enable filtering based on MAC, promisc, broadcast and allmulti To: anthony@codemonkey.ws, qemu-devel@nongnu.org Cc: markmc@redhat.com, kvm@vger.kernel.org, alex.williamson@hp.com Date: Wed, 04 Feb 2009 17:18:22 -0700 Message-ID: <20090205001822.27879.89787.stgit@kvm.aw> In-Reply-To: <20090205001707.27879.22745.stgit@kvm.aw> References: <20090205001707.27879.22745.stgit@kvm.aw> User-Agent: StGIT/0.14.2 MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Make use of the new RX_MODE control virtqueue class by dropping packets the guest doesn't want to see. Signed-off-by: Alex Williamson --- hw/virtio-net.c | 28 ++++++++++++++++++++++++++++ 1 files changed, 28 insertions(+), 0 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/hw/virtio-net.c b/hw/virtio-net.c index 7e130f7..001169d 100644 --- a/hw/virtio-net.c +++ b/hw/virtio-net.c @@ -222,6 +222,31 @@ static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, return offset; } +static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) +{ + static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; + uint8_t *ptr = (uint8_t *)buf; + + if (n->promisc) + return 1; + +#ifdef TAP_VNET_HDR + if (tap_has_vnet_hdr(n->vc->vlan->first_client)) + ptr += sizeof(struct virtio_net_hdr); +#endif + + if ((ptr[0] & 1) && n->allmulti) + return 1; + + if (!memcmp(ptr, bcast, sizeof(bcast))) + return 1; + + if (!memcmp(ptr, n->mac, ETH_ALEN)) + return 1; + + return 0; +} + static void virtio_net_receive(void *opaque, const uint8_t *buf, int size) { VirtIONet *n = opaque; @@ -231,6 +256,9 @@ static void virtio_net_receive(void *opaque, const uint8_t *buf, int size) if (!do_virtio_net_can_receive(n, size)) return; + if (!receive_filter(n, buf, size)) + return; + /* hdr_len refers to the header we supply to the guest */ hdr_len = n->mergeable_rx_bufs ? sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr);