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Fix runt TSO packet issue.

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Obtained from:	Chelsio Inc.
MFC after:	1 week
This commit is contained in:
Kip Macy 2008-08-13 01:32:32 +00:00
parent 706cb31f0a
commit 2bd5f41aae
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=181653
1 changed files with 22 additions and 19 deletions
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41
sys/dev/cxgb/cxgb_sge.c
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@ -1334,17 +1334,12 @@ t3_encap(struct sge_qset *qs, struct mbuf **m, int count)
return (0);
} else if (tso_info) {
int undersized, eth_type;
int min_size = TCPPKTHDRSIZE, eth_type, tagged;
struct cpl_tx_pkt_lso *hdr = (struct cpl_tx_pkt_lso *)txd;
struct ip *ip;
struct tcphdr *tcp;
char *pkthdr, tmp[TCPPKTHDRSIZE];
struct mbuf_vec *mv;
struct mbuf_iovec *tmpmi;
char *pkthdr;
mv = mtomv(m0);
tmpmi = mv->mv_vec;
txd->flit[2] = 0;
GET_VTAG(cntrl, m0);
cntrl |= V_TXPKT_OPCODE(CPL_TX_PKT_LSO);
@ -1353,21 +1348,29 @@ t3_encap(struct sge_qset *qs, struct mbuf **m, int count)
hdr->len = htonl(mlen | 0x80000000);
DPRINTF("tso buf len=%d\n", mlen);
undersized = (((tmpmi->mi_len < TCPPKTHDRSIZE) &&
(m0->m_flags & M_VLANTAG)) ||
(tmpmi->mi_len < TCPPKTHDRSIZE - ETHER_VLAN_ENCAP_LEN));
if (__predict_false(undersized)) {
pkthdr = tmp;
if (mi)
dump_mi(mi);
tagged = m0->m_flags & M_VLANTAG;
if (!tagged)
min_size -= ETHER_VLAN_ENCAP_LEN;
if (__predict_false(mlen < min_size)) {
printf("mbuf=%p,len=%d,tso_segsz=%d,csum_flags=%#x,flags=%#x",
m0, mlen, m0->m_pkthdr.tso_segsz, m0->m_pkthdr.csum_flags, m0->m_flags);
panic("discontig packet - fixxorz");
} else
pkthdr = m0->m_data;
m0, mlen, m0->m_pkthdr.tso_segsz,
m0->m_pkthdr.csum_flags, m0->m_flags);
panic("tx tso packet too small");
}
if (__predict_false(m0->m_flags & M_VLANTAG)) {
/* Make sure that ether, ip, tcp headers are all in m0 */
if (__predict_false(m0->m_len < min_size)) {
m0 = m_pullup(m0, min_size);
if (__predict_false(m0 == NULL)) {
/* XXX panic probably an overreaction */
panic("couldn't fit header into mbuf");
}
}
pkthdr = m0->m_data;
if (tagged) {
eth_type = CPL_ETH_II_VLAN;
ip = (struct ip *)(pkthdr + ETHER_HDR_LEN +
ETHER_VLAN_ENCAP_LEN);