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Miller" , virtualization@lists.linux-foundation.org, Cindy Lu , "Michael S. Tsirkin" , Eli Cohen , Gautam Dawar , =?utf-8?q?Eugenio_P=C3=A9rez?= , Jason Wang , netdev@vger.kernel.org, Parav Pandit Subject: [PATCH v3 1/2] virtio_net: disable VIRTIO_NET_F_STANDBY if VIRTIO_NET_F_MAC is not set Date: Fri, 27 Jan 2023 21:44:59 +0100 Message-Id: <20230127204500.51930-2-lvivier@redhat.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230127204500.51930-1-lvivier@redhat.com> References: <20230127204500.51930-1-lvivier@redhat.com> MIME-Version: 1.0 X-Provags-ID: V03:K1:dDynSjXZJgzJ6rJ90EiWqku5tMQFKKlPs/g0iszfvcj489W0tYY M/vXu6qUMHmP17ThNfHhcYYFzfce031ZX/FXDX2fIw3STSTDtsdSwqOe39QsY052PmuEEde WJ0jKGPMCZbtNnc6HsuayP4zSzWRJTYtAlbHwoJj+CEsZQv6zSuqnvqpKCrgX7Fz/Cjwc9f bKayJwTW1BtSunSJ/1GDQ== UI-OutboundReport: notjunk:1;M01:P0:YSRiWra10ag=;NKQnSarxFDt067Ku9TJc+7zxNck h9kzScSbWvaVcSwSGpUtyC01vMz6C73hZ7seUqPOuALdGFaO1B2dmc8kp2fUnmTcNy4y4aCdi nHam2FG+Zr4bVaPMsCxoGk4sAO0Mi9AQQuomKTOoV5+W3THRiOnjbBWoPwr6c4hjE89djTT5p 744xlGjzpEwrH78e/sSY54HZ2/1vGagtXlN6/ojEi98ZSoMzuELRS5y+voiq8MK6Msq0kxVNo xtC05/+KgGzD8u/chsW689xvfiXfTtFvrN25LF5AOUPKhWovlQ/Ruok5S+c4kHa2kkvIfq9Bo eIpTdn/c+TwhFZ83JR3m9duQ8OZbuEmj+52GvJ6GoGwSEGI2pJi4pgai84gwW4o8gT9c7QRlf Gkb7Au6OU94Uvv4WpwkyAa0Acj9KFjnJqtudC6XyBWMgBEAEwN46KrKcEb+nVKRQYpp8Euql7 cmSY4HHvTspiIWkl4euRLJqo434JuRlCHBlFVen2vJLf2yolj6Pfzl4v1H3HH0u0yH13bRQul SNOnCDAjE6A/AoDvldKhmXNTYaa6QPM4ayIx7PlbalHWnR3f0fLfUc6vfBkExUCqUCg0kOioU IyosR9+pX1ezChe1ylB33IC0CcYzGC+oF9rpDNDclBvlY6Vaqy9KEfNEFe1A+gPztZKD3UlXM hTwN4+Awzl2tT8Sc7p0o5KpuAhfCMlgIB2NCYxyrVA== X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756211859476487015?= X-GMAIL-MSGID: =?utf-8?q?1756211859476487015?= failover relies on the MAC address to pair the primary and the standby devices: "[...] the hypervisor needs to enable VIRTIO_NET_F_STANDBY feature on the virtio-net interface and assign the same MAC address to both virtio-net and VF interfaces." Documentation/networking/net_failover.rst This patch disables the STANDBY feature if the MAC address is not provided by the hypervisor. Signed-off-by: Laurent Vivier Acked-by: Michael S. Tsirkin --- drivers/net/virtio_net.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 7723b2a49d8e..7d700f8e545a 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -3688,6 +3688,12 @@ static int virtnet_validate(struct virtio_device *vdev) __virtio_clear_bit(vdev, VIRTIO_NET_F_MTU); } + if (virtio_has_feature(vdev, VIRTIO_NET_F_STANDBY) && + !virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) { + dev_warn(&vdev->dev, "device advertises feature VIRTIO_NET_F_STANDBY but not VIRTIO_NET_F_MAC, disabling standby"); + __virtio_clear_bit(vdev, VIRTIO_NET_F_STANDBY); + } + return 0; }