diff options
| author | Andrew Gallatin <gallatin@FreeBSD.org> | 2010-11-29 13:36:37 +0000 |
|---|---|---|
| committer | Andrew Gallatin <gallatin@FreeBSD.org> | 2010-11-29 13:36:37 +0000 |
| commit | cc4824933ce12f5f4ec1791cb34096db8545e8ad (patch) | |
| tree | 47a96f7416e86779d4f143e8f2571d13ac67a189 /sys | |
| parent | 6e6d2f6f6308642acacfad7115dfd6055e5a0e5f (diff) | |
Notes
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/mxge/if_mxge.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/sys/dev/mxge/if_mxge.c b/sys/dev/mxge/if_mxge.c index 7f86b4d82e15e..1d4c7516ef4a7 100644 --- a/sys/dev/mxge/if_mxge.c +++ b/sys/dev/mxge/if_mxge.c @@ -1828,9 +1828,20 @@ mxge_encap_tso(struct mxge_slice_state *ss, struct mbuf *m, tcp = (struct tcphdr *)((char *)ip + (ip->ip_hl << 2)); cum_len = -(ip_off + ((ip->ip_hl + tcp->th_off) << 2)); + cksum_offset = ip_off + (ip->ip_hl << 2); /* TSO implies checksum offload on this hardware */ - cksum_offset = ip_off + (ip->ip_hl << 2); + if (__predict_false((m->m_pkthdr.csum_flags & (CSUM_TCP)) == 0)) { + /* + * If packet has full TCP csum, replace it with pseudo hdr + * sum that the NIC expects, otherwise the NIC will emit + * packets with bad TCP checksums. + */ + m->m_pkthdr.csum_flags = CSUM_TCP; + m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum); + tcp->th_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, + htons(IPPROTO_TCP + (m->m_pkthdr.len - cksum_offset))); + } flags = MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST; |