Author: whu Date: Tue Jul 28 05:46:37 2015 New Revision: 285928 URL: https://svnweb.freebsd.org/changeset/base/285928
Log: MFC r285785 Do not enable UDP checksum offloading when running on the Hyper-V on Windows Server 2012 and earlier hosts. Submitted by: whu Reviewed by: royger Approved by: royger Relnotes: No Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D3217 Modified: stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c ============================================================================== --- stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Tue Jul 28 04:54:05 2015 (r285927) +++ stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Tue Jul 28 05:46:37 2015 (r285928) @@ -343,7 +343,15 @@ netvsc_attach(device_t dev) IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_HWCSUM | IFCAP_TSO; ifp->if_capenable |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_HWCSUM | IFCAP_TSO; - ifp->if_hwassist = CSUM_TCP | CSUM_UDP | CSUM_TSO; + /* + * Only enable UDP checksum offloading when it is on 2012R2 or + * later. UDP checksum offloading doesn't work on earlier + * Windows releases. + */ + if (hv_vmbus_protocal_version >= HV_VMBUS_VERSION_WIN8_1) + ifp->if_hwassist = CSUM_TCP | CSUM_UDP | CSUM_TSO; + else + ifp->if_hwassist = CSUM_TCP | CSUM_TSO; ret = hv_rf_on_device_add(device_ctx, &device_info); if (ret != 0) { @@ -1110,7 +1118,17 @@ hn_ioctl(struct ifnet *ifp, u_long cmd, ifp->if_hwassist &= ~(CSUM_TCP | CSUM_UDP); } else { ifp->if_capenable |= IFCAP_TXCSUM; - ifp->if_hwassist |= (CSUM_TCP | CSUM_UDP); + /* + * Only enable UDP checksum offloading on + * Windows Server 2012R2 or later releases. + */ + if (hv_vmbus_protocal_version >= + HV_VMBUS_VERSION_WIN8_1) { + ifp->if_hwassist |= + (CSUM_TCP | CSUM_UDP); + } else { + ifp->if_hwassist |= CSUM_TCP; + } } } _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
