Author: emaste
Date: Tue Dec 12 01:20:45 2017
New Revision: 326788
URL: https://svnweb.freebsd.org/changeset/base/326788
Log:
MFC r326597: vnic: apply hardware L3 checksum only for IPv4
Previously we set the csum_l3 flag for IPv4 and IPv6, but only IPv4
should have header checksumming applied.
Prompted by Linux commit fa6d7cb5d76cf0467c61420fc9238045aedfd379.
Sponsored by: The FreeBSD Foundation
Modified:
stable/11/sys/dev/vnic/nicvf_queues.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/dev/vnic/nicvf_queues.c
==============================================================================
--- stable/11/sys/dev/vnic/nicvf_queues.c Tue Dec 12 01:19:18 2017
(r326787)
+++ stable/11/sys/dev/vnic/nicvf_queues.c Tue Dec 12 01:20:45 2017
(r326788)
@@ -1802,6 +1802,8 @@ nicvf_sq_add_hdr_subdesc(struct snd_queue *sq, int qen
if (mbuf == NULL)
return (ENOBUFS);
}
+ if (mbuf->m_pkthdr.csum_flags & CSUM_IP)
+ hdr->csum_l3 = 1; /* Enable IP csum calculation */
ip = (struct ip *)(mbuf->m_data + ehdrlen);
iphlen = ip->ip_hl << 2;
@@ -1809,13 +1811,10 @@ nicvf_sq_add_hdr_subdesc(struct snd_queue *sq, int qen
proto = ip->ip_p;
break;
#endif
- default:
- hdr->csum_l3 = 0;
}
#if defined(INET6) || defined(INET)
if (poff > 0 && mbuf->m_pkthdr.csum_flags != 0) {
- hdr->csum_l3 = 1; /* Enable IP csum calculation */
switch (proto) {
case IPPROTO_TCP:
if ((mbuf->m_pkthdr.csum_flags & CSUM_TCP) == 0)
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