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bh=ts8/6AW1C0fMfD6EEERr/r95bnaSqwoK6ohlyXWos6Y=; b=inMS1GkFeks0WocffZpABadu6mJ006BpwJeV7dWi8qYPTazS+cacPgHVv5oPgHYm2OKoog XMqGNaQic+D5k6hvyrO5v5vF8rn2sOeYupKwP/eEMI2HyX8eHTKHFAOv3MczC0ZcNgl8Xp b48i/fiM7MG+9ZokK98VWbqPuSh80mU= X-MC-Unique: gjP552y3PcWPg8UeaBMWew-1 From: Cindy Lu To: mst@redhat.com, jasowang@redhat.com, qemu-devel@nongnu.org Subject: [PATCH v5 1/1] virtio-net: Add check for mac address while peer is vdpa Date: Fri, 26 Feb 2021 00:55:06 +0800 Message-Id: <20210225165506.18321-2-lulu@redhat.com> In-Reply-To: <20210225165506.18321-1-lulu@redhat.com> References: <20210225165506.18321-1-lulu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lulu@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; envelope-from=lulu@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: eperezma@redhat.com, amorenoz@redhat.com, lulu@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" While peer is vdpa, sometime qemu get an all zero mac address from the hard= ware, This is not a legal value. Add the check for this.if we get an zero mac add= ress. qemu will use the default mac address or the mac address from qemu cmdline Signed-off-by: Cindy Lu Tested-by: Adri=C3=A1n Moreno --- hw/net/virtio-net.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 9179013ac4..8f36ca5066 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -126,6 +126,7 @@ static void virtio_net_get_config(VirtIODevice *vdev, u= int8_t *config) VirtIONet *n =3D VIRTIO_NET(vdev); struct virtio_net_config netcfg; NetClientState *nc =3D qemu_get_queue(n->nic); + static const MACAddr zero =3D { .a =3D { 0, 0, 0, 0, 0, 0 } }; =20 int ret =3D 0; memset(&netcfg, 0 , sizeof(struct virtio_net_config)); @@ -151,6 +152,15 @@ static void virtio_net_get_config(VirtIODevice *vdev, = uint8_t *config) ret =3D vhost_net_get_config(get_vhost_net(nc->peer), (uint8_t *)&= netcfg, n->config_size); if (ret !=3D -1) { + /* + * Here is a work around, the 0 mac address is not a legal val= ue. + * if we got this from hardware, qemu will use the mac address + * saved in VirtIONet->mac. + */ + if (memcmp(&netcfg.mac, &zero, sizeof(zero)) =3D=3D 0) { + info_report("Get an all zero mac address from hardware"); + memcpy(netcfg.mac, n->mac, ETH_ALEN); + } memcpy(config, &netcfg, n->config_size); } } --=20 2.21.3