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In the data setup code for doing offloads the

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ip and tcp pointers were not reset after some
pullups. In practice this led to an NFS mount
failure when using UDP reported by Kevin Lo,
thanks Kevin. Fix from yongari, thank you!
This commit is contained in:
Jack F Vogel 2010-10-28 00:16:54 +00:00
parent b81422ef7f
commit 35928b338e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=214441
1 changed files with 6 additions and 1 deletions
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7
sys/dev/e1000/if_em.c
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@ -93,7 +93,7 @@ int em_display_debug_stats = 0;
/*********************************************************************
* Driver version:
*********************************************************************/
char em_driver_version[] = "7.1.6";
char em_driver_version[] = "7.1.7";
/*********************************************************************
* PCI Device ID Table
@ -1848,6 +1848,7 @@ em_xmit(struct tx_ring *txr, struct mbuf **m_headp)
*m_headp = NULL;
return (ENOBUFS);
}
ip = (struct ip *)(mtod(m_head, char *) + ip_off);
ip->ip_len = 0;
ip->ip_sum = 0;
/*
@ -1856,6 +1857,7 @@ em_xmit(struct tx_ring *txr, struct mbuf **m_headp)
* what hardware expect to see. This is adherence of
* Microsoft's Large Send specification.
*/
tp = (struct tcphdr *)(mtod(m_head, char *) + poff);
tp->th_sum = in_pseudo(ip->ip_src.s_addr,
ip->ip_dst.s_addr, htons(IPPROTO_TCP));
} else if (m_head->m_pkthdr.csum_flags & CSUM_TCP) {
@ -1865,12 +1867,15 @@ em_xmit(struct tx_ring *txr, struct mbuf **m_headp)
*m_headp = NULL;
return (ENOBUFS);
}
ip = (struct ip *)(mtod(m_head, char *) + ip_off);
tp = (struct tcphdr *)(mtod(m_head, char *) + poff);
} else if (m_head->m_pkthdr.csum_flags & CSUM_UDP) {
m_head = m_pullup(m_head, poff + sizeof(struct udphdr));
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
ip = (struct ip *)(mtod(m_head, char *) + ip_off);
}
*m_headp = m_head;
}