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vnic: apply hardware L3 checksum only for IPv4

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Previously we set the csum_l3 flag for IPv4 and IPv6, but only IPv4
should have header checksumming applied.

Prompted by Linux commit fa6d7cb5d76cf0467c61420fc9238045aedfd379.

Reviewed by:	bz
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D13366
This commit is contained in:
Ed Maste 2017-12-05 22:02:46 +00:00
parent 3670d4c79a
commit 7fe94db265
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=326597
1 changed files with 2 additions and 3 deletions
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5
sys/dev/vnic/nicvf_queues.c
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@ -1802,6 +1802,8 @@ nicvf_sq_add_hdr_subdesc(struct snd_queue *sq, int qentry,
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 qentry,
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)