Date: Tue, 10 Oct 2017 03:35:24 +0000 (UTC) From: Sepherosa Ziehau <sephe@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r324467 - stable/10/sys/dev/hyperv/netvsc Message-ID: <201710100335.v9A3ZOBK045757@repo.freebsd.org>
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Author: sephe Date: Tue Oct 10 03:35:24 2017 New Revision: 324467 URL: https://svnweb.freebsd.org/changeset/base/324467 Log: MFC 324048 hyperv/hn: Set tcp header offset for CSUM/LSO offloading. No observable effect; better safe than sorry. Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D12417 Modified: stable/10/sys/dev/hyperv/netvsc/if_hn.c stable/10/sys/dev/hyperv/netvsc/ndis.h Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/hyperv/netvsc/if_hn.c ============================================================================== --- stable/10/sys/dev/hyperv/netvsc/if_hn.c Tue Oct 10 03:29:36 2017 (r324466) +++ stable/10/sys/dev/hyperv/netvsc/if_hn.c Tue Oct 10 03:35:24 2017 (r324467) @@ -716,6 +716,7 @@ hn_tso_fixup(struct mbuf *m_head) ehlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; else ehlen = ETHER_HDR_LEN; + m_head->m_pkthdr.l2hlen = ehlen; #ifdef INET if (m_head->m_pkthdr.csum_flags & CSUM_IP_TSO) { @@ -725,6 +726,7 @@ hn_tso_fixup(struct mbuf *m_head) PULLUP_HDR(m_head, ehlen + sizeof(*ip)); ip = mtodo(m_head, ehlen); iphlen = ip->ip_hl << 2; + m_head->m_pkthdr.l3hlen = iphlen; PULLUP_HDR(m_head, ehlen + iphlen + sizeof(*th)); th = mtodo(m_head, ehlen + iphlen); @@ -748,6 +750,7 @@ hn_tso_fixup(struct mbuf *m_head) m_freem(m_head); return (NULL); } + m_head->m_pkthdr.l3hlen = sizeof(*ip6); PULLUP_HDR(m_head, ehlen + sizeof(*ip6) + sizeof(*th)); th = mtodo(m_head, ehlen + sizeof(*ip6)); @@ -757,41 +760,34 @@ hn_tso_fixup(struct mbuf *m_head) } #endif return (m_head); - } /* * NOTE: If this function failed, the m_head would be freed. */ static __inline struct mbuf * -hn_check_tcpsyn(struct mbuf *m_head, int *tcpsyn) +hn_set_hlen(struct mbuf *m_head) { const struct ether_vlan_header *evl; - const struct tcphdr *th; int ehlen; - *tcpsyn = 0; - PULLUP_HDR(m_head, sizeof(*evl)); evl = mtod(m_head, const struct ether_vlan_header *); if (evl->evl_encap_proto == ntohs(ETHERTYPE_VLAN)) ehlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; else ehlen = ETHER_HDR_LEN; + m_head->m_pkthdr.l2hlen = ehlen; #ifdef INET - if (m_head->m_pkthdr.csum_flags & CSUM_IP_TCP) { + if (m_head->m_pkthdr.csum_flags & (CSUM_IP_TCP | CSUM_IP_UDP)) { const struct ip *ip; int iphlen; PULLUP_HDR(m_head, ehlen + sizeof(*ip)); ip = mtodo(m_head, ehlen); iphlen = ip->ip_hl << 2; - - PULLUP_HDR(m_head, ehlen + iphlen + sizeof(*th)); - th = mtodo(m_head, ehlen + iphlen); - if (th->th_flags & TH_SYN) - *tcpsyn = 1; + m_head->m_pkthdr.l3hlen = iphlen; } #endif #if defined(INET6) && defined(INET) @@ -803,18 +799,36 @@ hn_check_tcpsyn(struct mbuf *m_head, int *tcpsyn) PULLUP_HDR(m_head, ehlen + sizeof(*ip6)); ip6 = mtodo(m_head, ehlen); - if (ip6->ip6_nxt != IPPROTO_TCP) - return (m_head); - - PULLUP_HDR(m_head, ehlen + sizeof(*ip6) + sizeof(*th)); - th = mtodo(m_head, ehlen + sizeof(*ip6)); - if (th->th_flags & TH_SYN) - *tcpsyn = 1; + if (ip6->ip6_nxt != IPPROTO_TCP) { + m_freem(m_head); + return (NULL); + } + m_head->m_pkthdr.l3hlen = sizeof(*ip6); } #endif return (m_head); } +/* + * NOTE: If this function failed, the m_head would be freed. + */ +static __inline struct mbuf * +hn_check_tcpsyn(struct mbuf *m_head, int *tcpsyn) +{ + const struct tcphdr *th; + int ehlen, iphlen; + + *tcpsyn = 0; + ehlen = m_head->m_pkthdr.l2hlen; + iphlen = m_head->m_pkthdr.l3hlen; + + PULLUP_HDR(m_head, ehlen + iphlen + sizeof(*th)); + th = mtodo(m_head, ehlen + iphlen); + if (th->th_flags & TH_SYN) + *tcpsyn = 1; + return (m_head); +} + #undef PULLUP_HDR #endif /* INET6 || INET */ @@ -2999,7 +3013,8 @@ hn_encap(struct ifnet *ifp, struct hn_tx_ring *txr, st NDIS_LSO2_INFO_SIZE, NDIS_PKTINFO_TYPE_LSO); #ifdef INET if (m_head->m_pkthdr.csum_flags & CSUM_IP_TSO) { - *pi_data = NDIS_LSO2_INFO_MAKEIPV4(0, + *pi_data = NDIS_LSO2_INFO_MAKEIPV4( + m_head->m_pkthdr.l2hlen + m_head->m_pkthdr.l3hlen, m_head->m_pkthdr.tso_segsz); } #endif @@ -3008,7 +3023,8 @@ hn_encap(struct ifnet *ifp, struct hn_tx_ring *txr, st #endif #ifdef INET6 { - *pi_data = NDIS_LSO2_INFO_MAKEIPV6(0, + *pi_data = NDIS_LSO2_INFO_MAKEIPV6( + m_head->m_pkthdr.l2hlen + m_head->m_pkthdr.l3hlen, m_head->m_pkthdr.tso_segsz); } #endif @@ -3025,11 +3041,15 @@ hn_encap(struct ifnet *ifp, struct hn_tx_ring *txr, st *pi_data |= NDIS_TXCSUM_INFO_IPCS; } - if (m_head->m_pkthdr.csum_flags & (CSUM_IP_TCP | CSUM_IP6_TCP)) - *pi_data |= NDIS_TXCSUM_INFO_TCPCS; - else if (m_head->m_pkthdr.csum_flags & - (CSUM_IP_UDP | CSUM_IP6_UDP)) - *pi_data |= NDIS_TXCSUM_INFO_UDPCS; + if (m_head->m_pkthdr.csum_flags & + (CSUM_IP_TCP | CSUM_IP6_TCP)) { + *pi_data |= NDIS_TXCSUM_INFO_MKTCPCS( + m_head->m_pkthdr.l2hlen + m_head->m_pkthdr.l3hlen); + } else if (m_head->m_pkthdr.csum_flags & + (CSUM_IP_UDP | CSUM_IP6_UDP)) { + *pi_data |= NDIS_TXCSUM_INFO_MKUDPCS( + m_head->m_pkthdr.l2hlen + m_head->m_pkthdr.l3hlen); + } } pkt_hlen = pkt->rm_pktinfooffset + pkt->rm_pktinfolen; @@ -5550,6 +5570,13 @@ hn_start_locked(struct hn_tx_ring *txr, int len) if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); continue; } + } else if (m_head->m_pkthdr.csum_flags & + (CSUM_IP_UDP | CSUM_IP_TCP | CSUM_IP6_UDP | CSUM_IP6_TCP)) { + m_head = hn_set_hlen(m_head); + if (__predict_false(m_head == NULL)) { + if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); + continue; + } } #endif @@ -5830,11 +5857,18 @@ hn_transmit(struct ifnet *ifp, struct mbuf *m) #if defined(INET6) || defined(INET) /* - * Perform TSO packet header fixup now, since the TSO - * packet header should be cache-hot. + * Perform TSO packet header fixup or get l2/l3 header length now, + * since packet headers should be cache-hot. */ if (m->m_pkthdr.csum_flags & CSUM_TSO) { m = hn_tso_fixup(m); + if (__predict_false(m == NULL)) { + if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); + return EIO; + } + } else if (m->m_pkthdr.csum_flags & + (CSUM_IP_UDP | CSUM_IP_TCP | CSUM_IP6_UDP | CSUM_IP6_TCP)) { + m = hn_set_hlen(m); if (__predict_false(m == NULL)) { if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return EIO; Modified: stable/10/sys/dev/hyperv/netvsc/ndis.h ============================================================================== --- stable/10/sys/dev/hyperv/netvsc/ndis.h Tue Oct 10 03:29:36 2017 (r324466) +++ stable/10/sys/dev/hyperv/netvsc/ndis.h Tue Oct 10 03:35:24 2017 (r324467) @@ -402,4 +402,13 @@ struct ndis_offload { #define NDIS_TXCSUM_INFO_IPCS 0x00000010 #define NDIS_TXCSUM_INFO_THOFF 0x03ff0000 +#define NDIS_TXCSUM_INFO_MKL4CS(thoff, flag) \ + ((((uint32_t)(thoff)) << 16) | (flag)) + +#define NDIS_TXCSUM_INFO_MKTCPCS(thoff) \ + NDIS_TXCSUM_INFO_MKL4CS((thoff), NDIS_TXCSUM_INFO_TCPCS) + +#define NDIS_TXCSUM_INFO_MKUDPCS(thoff) \ + NDIS_TXCSUM_INFO_MKL4CS((thoff), NDIS_TXCSUM_INFO_UDPCS) + #endif /* !_NET_NDIS_H_ */
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