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Thu, 5 Sep 2019 23:23:12 +0000 From: Haiyang Zhang To: "sashal@kernel.org" , "linux-hyperv@vger.kernel.org" , "netdev@vger.kernel.org" CC: Haiyang Zhang , KY Srinivasan , Stephen Hemminger , "olaf@aepfle.de" , vkuznets , "davem@davemloft.net" , "linux-kernel@vger.kernel.org" , Mark Bloch Subject: [PATCH net-next,v2, 2/2] hv_netvsc: Sync offloading features to VF NIC Thread-Topic: [PATCH net-next,v2, 2/2] hv_netvsc: Sync offloading features to VF NIC Thread-Index: AQHVZEDix2e9FNcwgkWwLrAPfhxrqQ== Date: Thu, 5 Sep 2019 23:23:12 +0000 Message-ID: <1567725722-33552-3-git-send-email-haiyangz@microsoft.com> References: <1567725722-33552-1-git-send-email-haiyangz@microsoft.com> In-Reply-To: <1567725722-33552-1-git-send-email-haiyangz@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR17CA0082.namprd17.prod.outlook.com (2603:10b6:300:c2::20) To DM6PR21MB1242.namprd21.prod.outlook.com (2603:10b6:5:169::22) authentication-results: spf=none (sender IP is ) smtp.mailfrom=lkmlhyz@microsoft.com; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: IrMDACHfHb0Uxq82stY+RI/h221EDPYCiLHblxysKpGR0Y27mOvpVOcCD/FlO1uoXBz2LdWxnSBy+2PwamQt61H+GYA0VTMpg5v9A0L9Y2gFBIdc4qCOEBZzl1sJmbtNzQWLeedHMxyH7Az5woYz0lL5k2Y5CNyKrPhsV7Y6SWqIAzgd3CyfXJbe1HpqZHQMunfSMe8UzjjfxgnoVukue58S9VgNah1GfL2PaSEOrWX2HnbJGHxO8MzcZRKxdGwFPxDcaXdKkgiaH/h95n6QesPLZciSi88gO+W0J1xVAbgrY219kI9j/vg0OOY/G4i2fatEnTc2ibBdYB7VN7IyMpNjf5mHb6Hn4m8VcvNdyI7p0lpQOPING8ALIzrngoXyRMpWJkoaRRB/0gSKpNuychtiPywFQvgdxMqBrJgjU/s= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7a31fd0b-f2d3-4b5f-a67c-08d73258051d X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Sep 2019 23:23:12.1314 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: up45kQSHc/vhQblMGTVs+YHRomcsBUXd8fBSVJq5OI4795o2gJEzi8k6amgHJ9mTQgYOO6XyDfbz4b0KnPIdLQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR21MB1241 Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org VF NIC may go down then come up during host servicing events. This causes the VF NIC offloading feature settings to roll back to the defaults. This patch can synchronize features from synthetic NIC to the VF NIC during ndo_set_features (ethtool -K), and netvsc_register_vf when VF comes back after host events. Signed-off-by: Haiyang Zhang Cc: Mark Bloch --- drivers/net/hyperv/netvsc_drv.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_dr= v.c index 1f1192e..39dddcd 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -1785,13 +1785,15 @@ static int netvsc_set_features(struct net_device *n= dev, netdev_features_t change =3D features ^ ndev->features; struct net_device_context *ndevctx =3D netdev_priv(ndev); struct netvsc_device *nvdev =3D rtnl_dereference(ndevctx->nvdev); + struct net_device *vf_netdev =3D rtnl_dereference(ndevctx->vf_netdev); struct ndis_offload_params offloads; + int ret =3D 0; =20 if (!nvdev || nvdev->destroy) return -ENODEV; =20 if (!(change & NETIF_F_LRO)) - return 0; + goto syncvf; =20 memset(&offloads, 0, sizeof(struct ndis_offload_params)); =20 @@ -1803,7 +1805,19 @@ static int netvsc_set_features(struct net_device *nd= ev, offloads.rsc_ip_v6 =3D NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED; } =20 - return rndis_filter_set_offload_params(ndev, nvdev, &offloads); + ret =3D rndis_filter_set_offload_params(ndev, nvdev, &offloads); + + if (ret) + features ^=3D NETIF_F_LRO; + +syncvf: + if (!vf_netdev) + return ret; + + vf_netdev->wanted_features =3D features; + netdev_update_features(vf_netdev); + + return ret; } =20 static u32 netvsc_get_msglevel(struct net_device *ndev) @@ -2181,6 +2195,10 @@ static int netvsc_register_vf(struct net_device *vf_= netdev) =20 dev_hold(vf_netdev); rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev); + + vf_netdev->wanted_features =3D ndev->features; + netdev_update_features(vf_netdev); + return NOTIFY_OK; } =20 --=20 1.8.3.1