When debugging TSO and other checksum offloads, dumping the various l*_len fields and TSO segmentation size can be helpful.
Example in OVS that dumps a mbuf on rte_eth_tx_prepare failure: Before: netdev_dpdk(pmd-c30/id:11)|DBG|dpdk0: First invalid packet: dump mbuf at 0x2201a916c0, iova=0x2200800580, buf_len=6864 pkt_len=6804, ol_flags=0x3114800000000102, nb_segs=1, port=65535, ptype=0 segment at 0x2201a916c0, data=0x22008005b2, len=6804, off=50, refcnt=1 Dump data at [0x22008005b2], len=6804 ... After: netdev_dpdk(pmd-c30/id:11)|DBG|dpdk0: First invalid packet: dump mbuf at 0x2201a916c0, iova=0x2200800580, buf_len=6864, pkt_len=6804 outer_l2_len=14, outer_l3_len=40, l2_len=38, l3_len=40, l4_len=32 ol_flags=0x3114800000000102, nb_segs=1, port=65535, ptype=0 segment at 0x2201a916c0, data=0x22008005b2, len=6804, off=50, refcnt=1 Dump data at [0x22008005b2], len=6804 ... Signed-off-by: David Marchand <[email protected]> --- lib/mbuf/rte_mbuf.c | 41 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 37 insertions(+), 4 deletions(-) diff --git a/lib/mbuf/rte_mbuf.c b/lib/mbuf/rte_mbuf.c index 0d931c7a15..12710a59df 100644 --- a/lib/mbuf/rte_mbuf.c +++ b/lib/mbuf/rte_mbuf.c @@ -750,10 +750,43 @@ rte_pktmbuf_dump(FILE *f, const struct rte_mbuf *m, unsigned dump_len) __rte_mbuf_sanity_check(m, 1); - fprintf(f, "dump mbuf at %p, iova=%#" PRIx64 ", buf_len=%u\n", m, rte_mbuf_iova_get(m), - m->buf_len); - fprintf(f, " pkt_len=%u, ol_flags=%#"PRIx64", nb_segs=%u, port=%u", - m->pkt_len, m->ol_flags, m->nb_segs, m->port); + fprintf(f, "dump mbuf at %p, iova=%#" PRIx64 ", buf_len=%u, pkt_len=%u\n", + m, rte_mbuf_iova_get(m), m->buf_len, m->pkt_len); + if (m->ol_flags & RTE_MBUF_F_TX_OFFLOAD_MASK) { + const char *sep = ""; + + fprintf(f, " "); + if (m->outer_l2_len != 0) { + fprintf(f, "%souter_l2_len=%u", sep, m->outer_l2_len); + sep = ", "; + } + if (m->outer_l3_len != 0) { + fprintf(f, "%souter_l3_len=%u", sep, m->outer_l3_len); + sep = ", "; + } + if (m->l2_len != 0) { + fprintf(f, "%sl2_len=%u", sep, m->l2_len); + sep = ", "; + } + if (m->l3_len != 0) { + fprintf(f, "%sl3_len=%u", sep, m->l3_len); + sep = ", "; + } + if (m->l4_len != 0) { + fprintf(f, "%sl4_len=%u", sep, m->l4_len); + sep = ", "; + } + if (m->tso_segsz != 0) { + fprintf(f, "%stso_segsz=%u", sep, m->tso_segsz); + sep = ", "; + } + + if (sep[0] == '\0') + fprintf(f, "no tx offload length set"); + fprintf(f, "\n"); + } + fprintf(f, " ol_flags=%#"PRIx64", nb_segs=%u, port=%u", + m->ol_flags, m->nb_segs, m->port); if (m->ol_flags & (RTE_MBUF_F_RX_QINQ | RTE_MBUF_F_TX_QINQ)) fprintf(f, ", vlan_tci_outer=%u", m->vlan_tci_outer); -- 2.51.0
