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Do not enable UDP checksum offloading when running on the Hyper-V on

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Windows Server 2012 and earlier hosts.

Submitted by: whu
Reviewed by: royger
Approved by: royger
MFC after: 3 days
Relnotes: No
Sponsored by: Microsoft OSTC
Differential Revision:  https://reviews.freebsd.org/D3086
This commit is contained in:
Wei Hu 2015-07-22 05:05:01 +00:00
parent 315dbfb053
commit 5f302628d0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=285785
1 changed files with 20 additions and 2 deletions
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22
sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
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@ -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) {
@ -1108,7 +1116,17 @@ hn_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
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;
}
}
}