On Wed, Oct 19, 2016 at 02:07:47PM +0000, Haiyang Zhang wrote: > > > > -----Original Message----- > > From: Jarod Wilson [mailto:ja...@redhat.com] > > Sent: Tuesday, October 18, 2016 10:34 PM > > To: linux-kernel@vger.kernel.org > > Cc: Jarod Wilson <ja...@redhat.com>; net...@vger.kernel.org; > > virtualizat...@lists.linux-foundation.org; KY Srinivasan > > <k...@microsoft.com>; Haiyang Zhang <haiya...@microsoft.com>; Michael S. > > Tsirkin <m...@redhat.com>; Shrikrishna Khare <skh...@vmware.com>; VMware, > > Inc. <pv-driv...@vmware.com> > > Subject: [PATCH net-next 5/6] net: use core MTU range checking in virt > > drivers > > > > hyperv_net: > > - set min/max_mtu > > > > virtio_net: > > - set min/max_mtu > > - remove virtnet_change_mtu > > > > vmxnet3: > > - set min/max_mtu > > > > CC: net...@vger.kernel.org > > CC: virtualizat...@lists.linux-foundation.org > > CC: "K. Y. Srinivasan" <k...@microsoft.com> > > CC: Haiyang Zhang <haiya...@microsoft.com> > > CC: "Michael S. Tsirkin" <m...@redhat.com> > > CC: Shrikrishna Khare <skh...@vmware.com> > > CC: "VMware, Inc." <pv-driv...@vmware.com> > > Signed-off-by: Jarod Wilson <ja...@redhat.com> > > --- > > drivers/net/hyperv/hyperv_net.h | 4 ++-- > > drivers/net/hyperv/netvsc_drv.c | 14 +++++++------- > > drivers/net/virtio_net.c | 23 ++++++++++------------- > > drivers/net/vmxnet3/vmxnet3_drv.c | 7 ++++--- > > 4 files changed, 23 insertions(+), 25 deletions(-) > > > > diff --git a/drivers/net/hyperv/hyperv_net.h > > b/drivers/net/hyperv/hyperv_net.h > > index f4fbcb5..3958ada 100644 > > --- a/drivers/net/hyperv/hyperv_net.h > > +++ b/drivers/net/hyperv/hyperv_net.h > > @@ -606,8 +606,8 @@ struct nvsp_message { > > } __packed; > > > > > > -#define NETVSC_MTU 65536 > > -#define NETVSC_MTU_MIN 68 > > +#define NETVSC_MTU 65535 > > Why change it to 65535? For Hyperv host, this should be 65536.
Forgot to call this change out, sorry. That was changed, because of IP_MAX_MTU being 0xFFFFU -> 65535. > > @@ -1343,6 +1336,13 @@ static int netvsc_probe(struct hv_device *dev, > > > > netif_carrier_off(net); > > > > + /* MTU range: 68 - 1500 or 65521 */ > > + net->min_mtu = NETVSC_MTU_MIN; > > + if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) > > + net->max_mtu = NETVSC_MTU - ETH_HLEN; > > + else > > + net->max_mtu = ETH_DATA_LEN; > > + > > netvsc_init_settings(net); > > > > net_device_ctx = netdev_priv(net); > > nvdev->nvsp_version is not set until after rndis_filter_device_add() > is successfully completed. > You need to move this part to the place just before this line: > ret = register_netdev(net); Okay, will fix that up. -- Jarod Wilson ja...@redhat.com
