hyperv/hn: Reset do_lro, if the hash types are not TCP related.
Mainly because the host side only set TCPCS and IPCS even for UDP datagrams. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8369
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=308119
@ -1754,6 +1754,13 @@ hn_rxpkt(struct hn_rx_ring *rxr, const void *data, int dlen,
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rxr->hn_csum_udp++;
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}
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/*
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* XXX
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* As of this write (Oct 28th, 2016), host side will turn
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* on only TCPCS_OK and IPCS_OK even for UDP datagrams, so
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* the do_lro setting here is actually _not_ accurate. We
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* depend on the RSS hash type check to reset do_lro.
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*/
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if ((info->csum_info &
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(NDIS_RXCSUM_INFO_TCPCS_OK | NDIS_RXCSUM_INFO_IPCS_OK)) ==
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(NDIS_RXCSUM_INFO_TCPCS_OK | NDIS_RXCSUM_INFO_IPCS_OK))
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@ -1828,9 +1835,16 @@ hn_rxpkt(struct hn_rx_ring *rxr, const void *data, int dlen,
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NDIS_HASH_FUNCTION_TOEPLITZ) {
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uint32_t type = (info->hash_info & NDIS_HASH_TYPE_MASK);
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/*
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* NOTE:
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* do_lro is resetted, if the hash types are not TCP
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* related. See the comment in the above csum_flags
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* setup section.
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*/
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switch (type) {
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case NDIS_HASH_IPV4:
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hash_type = M_HASHTYPE_RSS_IPV4;
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do_lro = 0;
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break;
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case NDIS_HASH_TCP_IPV4:
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@ -1839,10 +1853,12 @@ hn_rxpkt(struct hn_rx_ring *rxr, const void *data, int dlen,
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case NDIS_HASH_IPV6:
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hash_type = M_HASHTYPE_RSS_IPV6;
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do_lro = 0;
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break;
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case NDIS_HASH_IPV6_EX:
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hash_type = M_HASHTYPE_RSS_IPV6_EX;
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do_lro = 0;
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break;
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case NDIS_HASH_TCP_IPV6:
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