The only way to enable diagnostics for TX paths is to modify the
application source code. Making it difficult to diagnose faults.

In this patch, the devarg option "mbuf_check" is introduced and the
parameters are configured to enable the corresponding diagnostics.

supported cases: mbuf, size, segment, offload, strict.
 1. mbuf: check for corrupted mbuf.
 2. size: check min/max packet length according to hw spec.
 3. segment: check number of mbuf segments not exceed hw limitation.
 4. offload: check any unsupported offload flag.
 5. strict: check protocol headers.

parameter format: mbuf_check=[mbuf,<case1>,<case2>]
eg: dpdk-testpmd -a 0000:81:01.0,mbuf_check=[mbuf,size] -- -i

Signed-off-by: Mingjin Ye <mingjinx...@intel.com>
---
v2: Remove call chain.
---
 drivers/net/iavf/iavf.h        |  25 ++++-
 drivers/net/iavf/iavf_ethdev.c |  69 ++++++++++++
 drivers/net/iavf/iavf_rxtx.c   | 186 ++++++++++++++++++++++++++-------
 drivers/net/iavf/iavf_rxtx.h   |   6 ++
 4 files changed, 246 insertions(+), 40 deletions(-)

diff --git a/drivers/net/iavf/iavf.h b/drivers/net/iavf/iavf.h
index 10868f2c30..ab80388422 100644
--- a/drivers/net/iavf/iavf.h
+++ b/drivers/net/iavf/iavf.h
@@ -113,9 +113,14 @@ struct iavf_ipsec_crypto_stats {
        } ierrors;
 };
 
+struct iavf_mdd_stats {
+       uint64_t tx_pkt_errors;
+};
+
 struct iavf_eth_xstats {
        struct virtchnl_eth_stats eth_stats;
        struct iavf_ipsec_crypto_stats ips_stats;
+       struct iavf_mdd_stats mdd_stats;
 };
 
 /* Structure that defines a VSI, associated with a adapter. */
@@ -309,10 +314,27 @@ struct iavf_devargs {
        uint32_t watchdog_period;
        int auto_reset;
        int no_poll_on_link_down;
+       int mbuf_check;
 };
 
 struct iavf_security_ctx;
 
+struct iavf_rx_burst_elem {
+       TAILQ_ENTRY(iavf_rx_burst_elem) next;
+       eth_rx_burst_t rx_pkt_burst;
+};
+
+struct iavf_tx_burst_elem {
+       TAILQ_ENTRY(iavf_tx_burst_elem) next;
+       eth_tx_burst_t tx_pkt_burst;
+};
+
+#define IAVF_MDD_CHECK_F_TX_MBUF        (1ULL << 0)
+#define IAVF_MDD_CHECK_F_TX_SIZE        (1ULL << 1)
+#define IAVF_MDD_CHECK_F_TX_SEGMENT     (1ULL << 2)
+#define IAVF_MDD_CHECK_F_TX_OFFLOAD     (1ULL << 3)
+#define IAVF_MDD_CHECK_F_TX_STRICT      (1ULL << 4)
+
 /* Structure to store private data for each VF instance. */
 struct iavf_adapter {
        struct iavf_hw hw;
@@ -328,8 +350,7 @@ struct iavf_adapter {
        bool stopped;
        bool closed;
        bool no_poll;
-       eth_rx_burst_t rx_pkt_burst;
-       eth_tx_burst_t tx_pkt_burst;
+       uint64_t mc_flags; /* mdd check flags. */
        uint16_t fdir_ref_cnt;
        struct iavf_devargs devargs;
 };
diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index d1edb0dd5c..6f4dd54602 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -39,6 +39,8 @@
 #define IAVF_RESET_WATCHDOG_ARG    "watchdog_period"
 #define IAVF_ENABLE_AUTO_RESET_ARG "auto_reset"
 #define IAVF_NO_POLL_ON_LINK_DOWN_ARG "no-poll-on-link-down"
+#define IAVF_MDD_CHECK_ARG       "mbuf_check"
+
 uint64_t iavf_timestamp_dynflag;
 int iavf_timestamp_dynfield_offset = -1;
 
@@ -48,6 +50,7 @@ static const char * const iavf_valid_args[] = {
        IAVF_RESET_WATCHDOG_ARG,
        IAVF_ENABLE_AUTO_RESET_ARG,
        IAVF_NO_POLL_ON_LINK_DOWN_ARG,
+       IAVF_MDD_CHECK_ARG,
        NULL
 };
 
@@ -174,6 +177,7 @@ static const struct rte_iavf_xstats_name_off 
rte_iavf_stats_strings[] = {
        {"tx_broadcast_packets", _OFF_OF(eth_stats.tx_broadcast)},
        {"tx_dropped_packets", _OFF_OF(eth_stats.tx_discards)},
        {"tx_error_packets", _OFF_OF(eth_stats.tx_errors)},
+       {"tx_mdd_error_packets", _OFF_OF(mdd_stats.tx_pkt_errors)},
 
        {"inline_ipsec_crypto_ipackets", _OFF_OF(ips_stats.icount)},
        {"inline_ipsec_crypto_ibytes", _OFF_OF(ips_stats.ibytes)},
@@ -1881,6 +1885,8 @@ static int iavf_dev_xstats_get(struct rte_eth_dev *dev,
 {
        int ret;
        unsigned int i;
+       struct iavf_tx_queue *txq;
+       uint64_t mdd_pkt_errors = 0;
        struct iavf_adapter *adapter =
                IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
        struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
@@ -1904,6 +1910,15 @@ static int iavf_dev_xstats_get(struct rte_eth_dev *dev,
        if (iavf_ipsec_crypto_supported(adapter))
                iavf_dev_update_ipsec_xstats(dev, &iavf_xtats.ips_stats);
 
+       if (adapter->devargs.mbuf_check) {
+               for (i = 0; i < dev->data->nb_tx_queues; i++) {
+                       txq = dev->data->tx_queues[i];
+                       mdd_pkt_errors += __atomic_load_n(&txq->mdd_pkt_errors,
+                               __ATOMIC_RELAXED);
+               }
+               iavf_xtats.mdd_stats.tx_pkt_errors = mdd_pkt_errors;
+       }
+
        /* loop over xstats array and values from pstats */
        for (i = 0; i < IAVF_NB_XSTATS; i++) {
                xstats[i].id = i;
@@ -2286,6 +2301,52 @@ iavf_parse_watchdog_period(__rte_unused const char *key, 
const char *value, void
        return 0;
 }
 
+static int
+iavf_parse_mdd_checker(__rte_unused const char *key, const char *value, void 
*args)
+{
+       char *cur;
+       char *tmp;
+       int str_len;
+       int valid_len;
+
+       int ret = 0;
+       uint64_t *mc_flags = args;
+       char *str2 = strdup(value);
+       if (str2 == NULL)
+               return -1;
+
+       str_len = strlen(str2);
+       if (str2[0] == '[' && str2[str_len - 1] == ']') {
+               if (str_len < 3) {
+                       ret = -1;
+                       goto mdd_end;
+               }
+               valid_len = str_len - 2;
+               memmove(str2, str2 + 1, valid_len);
+               memset(str2 + valid_len, '\0', 2);
+       }
+       cur = strtok_r(str2, ",", &tmp);
+       while (cur != NULL) {
+               if (!strcmp(cur, "mbuf"))
+                       *mc_flags |= IAVF_MDD_CHECK_F_TX_MBUF;
+               else if (!strcmp(cur, "size"))
+                       *mc_flags |= IAVF_MDD_CHECK_F_TX_SIZE;
+               else if (!strcmp(cur, "segment"))
+                       *mc_flags |= IAVF_MDD_CHECK_F_TX_SEGMENT;
+               else if (!strcmp(cur, "offload"))
+                       *mc_flags |= IAVF_MDD_CHECK_F_TX_OFFLOAD;
+               else if (!strcmp(cur, "strict"))
+                       *mc_flags |= IAVF_MDD_CHECK_F_TX_STRICT;
+               else
+                       PMD_DRV_LOG(ERR, "Unsupported mdd check type: %s", cur);
+               cur = strtok_r(NULL, ",", &tmp);
+       }
+
+mdd_end:
+       free(str2);
+       return ret;
+}
+
 static int iavf_parse_devargs(struct rte_eth_dev *dev)
 {
        struct iavf_adapter *ad =
@@ -2340,6 +2401,14 @@ static int iavf_parse_devargs(struct rte_eth_dev *dev)
                goto bail;
        }
 
+       ret = rte_kvargs_process(kvlist, IAVF_MDD_CHECK_ARG,
+                                &iavf_parse_mdd_checker, &ad->mc_flags);
+       if (ret)
+               goto bail;
+
+       if (ad->mc_flags)
+               ad->devargs.mbuf_check = 1;
+
        ret = rte_kvargs_process(kvlist, IAVF_ENABLE_AUTO_RESET_ARG,
                                 &parse_bool, &ad->devargs.auto_reset);
        if (ret)
diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index f19aa14646..86b7af3263 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -425,6 +425,8 @@ struct iavf_txq_ops iavf_txq_release_mbufs_ops[] = {
 
 };
 
+static struct iavf_pkt_burst iavf_rxtx_pkt_burst[RTE_MAX_ETHPORTS];
+
 static inline void
 iavf_rxd_to_pkt_fields_by_comms_ovs(__rte_unused struct iavf_rx_queue *rxq,
                                    struct rte_mbuf *mb,
@@ -3394,34 +3396,34 @@ check_mbuf_len(struct offload_info *info, struct 
rte_mbuf *m)
 {
        if (m->ol_flags & RTE_MBUF_F_TX_TUNNEL_MASK) {
                if (info->outer_l2_len != m->outer_l2_len) {
-                       PMD_TX_LOG(ERR, "outer_l2_len error in mbuf. Original "
-                       "length: %hu, calculated length: %u", m->outer_l2_len,
+                       PMD_DRV_LOG(ERR, "outer_l2_len error in mbuf. Original "
+                       "length: %d, calculated length: %u", m->outer_l2_len,
                        info->outer_l2_len);
                        return -1;
                }
                if (info->outer_l3_len != m->outer_l3_len) {
-                       PMD_TX_LOG(ERR, "outer_l3_len error in mbuf. Original "
-                       "length: %hu,calculated length: %u", m->outer_l3_len,
+                       PMD_DRV_LOG(ERR, "outer_l3_len error in mbuf. Original "
+                       "length: %d,calculated length: %u", m->outer_l3_len,
                        info->outer_l3_len);
                        return -1;
                }
        }
 
        if (info->l2_len != m->l2_len) {
-               PMD_TX_LOG(ERR, "l2_len error in mbuf. Original "
-               "length: %hu, calculated length: %u", m->l2_len,
+               PMD_DRV_LOG(ERR, "l2_len error in mbuf. Original "
+               "length: %d, calculated length: %u", m->l2_len,
                info->l2_len);
                return -1;
        }
        if (info->l3_len != m->l3_len) {
-               PMD_TX_LOG(ERR, "l3_len error in mbuf. Original "
-               "length: %hu, calculated length: %u", m->l3_len,
+               PMD_DRV_LOG(ERR, "l3_len error in mbuf. Original "
+               "length: %d, calculated length: %u", m->l3_len,
                info->l3_len);
                return -1;
        }
        if (info->l4_len != m->l4_len) {
-               PMD_TX_LOG(ERR, "l4_len error in mbuf. Original "
-               "length: %hu, calculated length: %u", m->l4_len,
+               PMD_DRV_LOG(ERR, "l4_len error in mbuf. Original "
+               "length: %d, calculated length: %u", m->l4_len,
                info->l4_len);
                return -1;
        }
@@ -3438,24 +3440,24 @@ check_ether_type(struct offload_info *info, struct 
rte_mbuf *m)
                if (info->outer_ethertype ==
                        rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4)) {
                        if (!(m->ol_flags & RTE_MBUF_F_TX_OUTER_IPV4)) {
-                               PMD_TX_LOG(ERR, "Outer ethernet type is ipv4, "
+                               PMD_DRV_LOG(ERR, "Outer ethernet type is ipv4, "
                                "tx offload missing `RTE_MBUF_F_TX_OUTER_IPV4` 
flag.");
                                ret = -1;
                        }
                        if (m->ol_flags & RTE_MBUF_F_TX_OUTER_IPV6) {
-                               PMD_TX_LOG(ERR, "Outer ethernet type is ipv4, 
tx "
+                               PMD_DRV_LOG(ERR, "Outer ethernet type is ipv4, 
tx "
                                "offload contains wrong 
`RTE_MBUF_F_TX_OUTER_IPV6` flag");
                                ret = -1;
                        }
                } else if (info->outer_ethertype ==
                        rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6)) {
                        if (!(m->ol_flags & RTE_MBUF_F_TX_OUTER_IPV6)) {
-                               PMD_TX_LOG(ERR, "Outer ethernet type is ipv6, "
+                               PMD_DRV_LOG(ERR, "Outer ethernet type is ipv6, "
                                "tx offload missing `RTE_MBUF_F_TX_OUTER_IPV6` 
flag.");
                                ret = -1;
                        }
                        if (m->ol_flags & RTE_MBUF_F_TX_OUTER_IPV4) {
-                               PMD_TX_LOG(ERR, "Outer ethernet type is ipv6, 
tx "
+                               PMD_DRV_LOG(ERR, "Outer ethernet type is ipv6, 
tx "
                                "offload contains wrong 
`RTE_MBUF_F_TX_OUTER_IPV4` flag");
                                ret = -1;
                        }
@@ -3465,24 +3467,24 @@ check_ether_type(struct offload_info *info, struct 
rte_mbuf *m)
        if (info->ethertype ==
                rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4)) {
                if (!(m->ol_flags & RTE_MBUF_F_TX_IPV4)) {
-                       PMD_TX_LOG(ERR, "Ethernet type is ipv4, tx offload "
+                       PMD_DRV_LOG(ERR, "Ethernet type is ipv4, tx offload "
                        "missing `RTE_MBUF_F_TX_IPV4` flag.");
                        ret = -1;
                }
                if (m->ol_flags & RTE_MBUF_F_TX_IPV6) {
-                       PMD_TX_LOG(ERR, "Ethernet type is ipv4, tx "
+                       PMD_DRV_LOG(ERR, "Ethernet type is ipv4, tx "
                        "offload contains wrong `RTE_MBUF_F_TX_IPV6` flag");
                        ret = -1;
                }
        } else if (info->ethertype ==
                rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6)) {
                if (!(m->ol_flags & RTE_MBUF_F_TX_IPV6)) {
-                       PMD_TX_LOG(ERR, "Ethernet type is ipv6, tx offload "
+                       PMD_DRV_LOG(ERR, "Ethernet type is ipv6, tx offload "
                        "missing `RTE_MBUF_F_TX_IPV6` flag.");
                        ret = -1;
                }
                if (m->ol_flags & RTE_MBUF_F_TX_IPV4) {
-                       PMD_TX_LOG(ERR, "Ethernet type is ipv6, tx offload "
+                       PMD_DRV_LOG(ERR, "Ethernet type is ipv6, tx offload "
                        "contains wrong `RTE_MBUF_F_TX_IPV4` flag");
                        ret = -1;
                }
@@ -3512,12 +3514,12 @@ iavf_check_mbuf(struct rte_mbuf *m)
                parse_gtp(udp_hdr, &info);
                if (info.is_tunnel) {
                        if (!tunnel_type) {
-                               PMD_TX_LOG(ERR, "gtp tunnel packet missing tx "
+                               PMD_DRV_LOG(ERR, "gtp tunnel packet missing tx "
                                "offload missing `RTE_MBUF_F_TX_TUNNEL_GTP` 
flag.");
                                return -1;
                        }
                        if (tunnel_type != RTE_MBUF_F_TX_TUNNEL_GTP) {
-                               PMD_TX_LOG(ERR, "gtp tunnel packet, tx offload 
has wrong "
+                               PMD_DRV_LOG(ERR, "gtp tunnel packet, tx offload 
has wrong "
                                "`%s` flag, correct is 
`RTE_MBUF_F_TX_TUNNEL_GTP` flag",
                                rte_get_tx_ol_flag_name(tunnel_type));
                                return -1;
@@ -3527,12 +3529,12 @@ iavf_check_mbuf(struct rte_mbuf *m)
                parse_vxlan_gpe(udp_hdr, &info);
                if (info.is_tunnel) {
                        if (!tunnel_type) {
-                               PMD_TX_LOG(ERR, "vxlan gpe tunnel packet 
missing tx "
+                               PMD_DRV_LOG(ERR, "vxlan gpe tunnel packet 
missing tx "
                                "offload missing 
`RTE_MBUF_F_TX_TUNNEL_VXLAN_GPE` flag.");
                                return -1;
                        }
                        if (tunnel_type != RTE_MBUF_F_TX_TUNNEL_VXLAN_GPE) {
-                               PMD_TX_LOG(ERR, "vxlan gpe tunnel packet, tx 
offload has "
+                               PMD_DRV_LOG(ERR, "vxlan gpe tunnel packet, tx 
offload has "
                                "wrong `%s` flag, correct is "
                                "`RTE_MBUF_F_TX_TUNNEL_VXLAN_GPE` flag",
                                rte_get_tx_ol_flag_name(tunnel_type));
@@ -3543,12 +3545,12 @@ iavf_check_mbuf(struct rte_mbuf *m)
                parse_vxlan(udp_hdr, &info);
                if (info.is_tunnel) {
                        if (!tunnel_type) {
-                               PMD_TX_LOG(ERR, "vxlan tunnel packet missing tx 
"
+                               PMD_DRV_LOG(ERR, "vxlan tunnel packet missing 
tx "
                                "offload missing `RTE_MBUF_F_TX_TUNNEL_VXLAN` 
flag.");
                                return -1;
                        }
                        if (tunnel_type != RTE_MBUF_F_TX_TUNNEL_VXLAN) {
-                               PMD_TX_LOG(ERR, "vxlan tunnel packet, tx 
offload has "
+                               PMD_DRV_LOG(ERR, "vxlan tunnel packet, tx 
offload has "
                                "wrong `%s` flag, correct is "
                                "`RTE_MBUF_F_TX_TUNNEL_VXLAN` flag",
                                rte_get_tx_ol_flag_name(tunnel_type));
@@ -3559,12 +3561,12 @@ iavf_check_mbuf(struct rte_mbuf *m)
                parse_geneve(udp_hdr, &info);
                if (info.is_tunnel) {
                        if (!tunnel_type) {
-                               PMD_TX_LOG(ERR, "geneve tunnel packet missing 
tx "
+                               PMD_DRV_LOG(ERR, "geneve tunnel packet missing 
tx "
                                "offload missing `RTE_MBUF_F_TX_TUNNEL_GENEVE` 
flag.");
                                return -1;
                        }
                        if (tunnel_type != RTE_MBUF_F_TX_TUNNEL_GENEVE) {
-                               PMD_TX_LOG(ERR, "geneve tunnel packet, tx 
offload has "
+                               PMD_DRV_LOG(ERR, "geneve tunnel packet, tx 
offload has "
                                "wrong `%s` flag, correct is "
                                "`RTE_MBUF_F_TX_TUNNEL_GENEVE` flag",
                                rte_get_tx_ol_flag_name(tunnel_type));
@@ -3575,7 +3577,7 @@ iavf_check_mbuf(struct rte_mbuf *m)
                /* Always keep last. */
                if (unlikely(RTE_ETH_IS_TUNNEL_PKT(m->packet_type)
                        != 0)) {
-                       PMD_TX_LOG(ERR, "Unknown tunnel packet. UDP dst port: 
%hu",
+                       PMD_DRV_LOG(ERR, "Unknown tunnel packet. UDP dst port: 
%hu",
                                udp_hdr->dst_port);
                                return -1;
                }
@@ -3587,12 +3589,12 @@ iavf_check_mbuf(struct rte_mbuf *m)
                parse_gre(gre_hdr, &info);
                if (info.is_tunnel) {
                        if (!tunnel_type) {
-                               PMD_TX_LOG(ERR, "gre tunnel packet missing tx "
+                               PMD_DRV_LOG(ERR, "gre tunnel packet missing tx "
                                "offload missing `RTE_MBUF_F_TX_TUNNEL_GRE` 
flag.");
                                return -1;
                        }
                        if (tunnel_type != RTE_MBUF_F_TX_TUNNEL_GRE) {
-                               PMD_TX_LOG(ERR, "gre tunnel packet, tx offload 
has "
+                               PMD_DRV_LOG(ERR, "gre tunnel packet, tx offload 
has "
                                "wrong `%s` flag, correct is "
                                "`RTE_MBUF_F_TX_TUNNEL_GRE` flag",
                                rte_get_tx_ol_flag_name(tunnel_type));
@@ -3607,12 +3609,12 @@ iavf_check_mbuf(struct rte_mbuf *m)
                parse_encap_ip(encap_ip_hdr, &info);
                if (info.is_tunnel) {
                        if (!tunnel_type) {
-                               PMD_TX_LOG(ERR, "Ipip tunnel packet missing tx "
+                               PMD_DRV_LOG(ERR, "Ipip tunnel packet missing tx 
"
                                "offload missing `RTE_MBUF_F_TX_TUNNEL_IPIP` 
flag.");
                                return -1;
                        }
                        if (tunnel_type != RTE_MBUF_F_TX_TUNNEL_IPIP) {
-                               PMD_TX_LOG(ERR, "Ipip tunnel packet, tx offload 
has "
+                               PMD_DRV_LOG(ERR, "Ipip tunnel packet, tx 
offload has "
                                "wrong `%s` flag, correct is "
                                "`RTE_MBUF_F_TX_TUNNEL_IPIP` flag",
                                rte_get_tx_ol_flag_name(tunnel_type));
@@ -3629,6 +3631,100 @@ iavf_check_mbuf(struct rte_mbuf *m)
        return check_ether_type(&info, m);
 }
 
+/* Tx MDD check */
+static uint16_t
+iavf_xmit_pkts_mdd(void *tx_queue, struct rte_mbuf **tx_pkts,
+             uint16_t nb_pkts)
+{
+       struct iavf_tx_queue *txq = tx_queue;
+       struct iavf_adapter *adapter = txq->vsi->adapter;
+       uint16_t idx;
+       uint64_t ol_flags;
+       struct rte_mbuf *mb;
+       const char *reason = NULL;
+       uint64_t pkt_errors = 0;
+
+
+       for (idx = 0; idx < nb_pkts; idx++) {
+               mb = tx_pkts[idx];
+               ol_flags = mb->ol_flags;
+
+               if ((adapter->mc_flags & IAVF_MDD_CHECK_F_TX_MBUF) &&
+                       (rte_mbuf_check(mb, 1, &reason) != 0)) {
+                       PMD_DRV_LOG(ERR, "INVALID mbuf: %s\n", reason);
+                       pkt_errors++;
+                       continue;
+               }
+
+               if ((adapter->mc_flags & IAVF_MDD_CHECK_F_TX_SIZE) &&
+                       (mb->data_len < IAVF_TX_MIN_PKT_LEN ||
+                       mb->data_len > adapter->vf.max_pkt_len)) {
+                       PMD_DRV_LOG(ERR, "INVALID mbuf: data_len (%u) is out "
+                       "of range, reasonable range (%d - %u)\n", mb->data_len,
+                       IAVF_TX_MIN_PKT_LEN, adapter->vf.max_pkt_len);
+                       pkt_errors++;
+                       continue;
+               }
+
+               if (adapter->mc_flags & IAVF_MDD_CHECK_F_TX_SEGMENT) {
+                       /* Check condition for nb_segs > IAVF_TX_MAX_MTU_SEG. */
+                       if (!(ol_flags & (RTE_MBUF_F_TX_TCP_SEG | 
RTE_MBUF_F_TX_UDP_SEG))) {
+                               if (mb->nb_segs > IAVF_TX_MAX_MTU_SEG) {
+                                       PMD_DRV_LOG(ERR, "INVALID mbuf: nb_segs 
(%d) exceeds "
+                                       "HW limit, maximum allowed value is 
%d\n", mb->nb_segs,
+                                       IAVF_TX_MAX_MTU_SEG);
+                                       pkt_errors++;
+                                       continue;
+                               }
+                       } else if ((mb->tso_segsz < IAVF_MIN_TSO_MSS) ||
+                               (mb->tso_segsz > IAVF_MAX_TSO_MSS)) {
+                               /* MSS outside the range are considered 
malicious */
+                               PMD_DRV_LOG(ERR, "INVALID mbuf: tso_segsz (%u) 
is out "
+                               "of range, reasonable range (%d - %u)\n", 
mb->tso_segsz,
+                               IAVF_MIN_TSO_MSS, IAVF_MAX_TSO_MSS);
+                               pkt_errors++;
+                               continue;
+                       } else if (mb->nb_segs > txq->nb_tx_desc) {
+                               PMD_DRV_LOG(ERR, "INVALID mbuf: nb_segs out "
+                               "of ring length\n");
+                               pkt_errors++;
+                               continue;
+                       }
+               }
+
+               if (adapter->mc_flags & IAVF_MDD_CHECK_F_TX_OFFLOAD) {
+                       if (ol_flags & IAVF_TX_OFFLOAD_NOTSUP_MASK) {
+                               PMD_DRV_LOG(ERR, "INVALID mbuf: TX offload "
+                               "is not supported\n");
+                               pkt_errors++;
+                               continue;
+                       }
+
+                       if (!rte_validate_tx_offload(mb)) {
+                               PMD_DRV_LOG(ERR, "INVALID mbuf: TX offload "
+                               "setup error\n");
+                               pkt_errors++;
+                               continue;
+                       }
+               }
+
+               if (adapter->mc_flags & IAVF_MDD_CHECK_F_TX_STRICT &&
+                       iavf_check_mbuf(mb)) {
+                       pkt_errors++;
+                       continue;
+               }
+       }
+
+       if (pkt_errors) {
+               __atomic_fetch_add(&txq->mdd_pkt_errors,
+                       pkt_errors, rte_memory_order_release);
+               return 0;
+       }
+
+       return iavf_rxtx_pkt_burst[txq->port_id].tx_burst_raw(tx_queue,
+                                                               tx_pkts, 
nb_pkts);
+}
+
 /* TX prep functions */
 uint16_t
 iavf_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
@@ -3715,7 +3811,7 @@ iavf_recv_pkts_no_poll(void *rx_queue, struct rte_mbuf 
**rx_pkts,
        if (!rxq->vsi || rxq->vsi->adapter->no_poll)
                return 0;
 
-       return rxq->vsi->adapter->rx_pkt_burst(rx_queue,
+       return iavf_rxtx_pkt_burst[rxq->port_id].rx_burst_raw(rx_queue,
                                                                rx_pkts, 
nb_pkts);
 }
 
@@ -3727,7 +3823,7 @@ iavf_xmit_pkts_no_poll(void *tx_queue, struct rte_mbuf 
**tx_pkts,
        if (!txq->vsi || txq->vsi->adapter->no_poll)
                return 0;
 
-       return txq->vsi->adapter->tx_pkt_burst(tx_queue,
+       return iavf_rxtx_pkt_burst[txq->port_id].tx_burst_raw(tx_queue,
                                                                tx_pkts, 
nb_pkts);
 }
 
@@ -3917,7 +4013,8 @@ iavf_set_rx_function(struct rte_eth_dev *dev)
                }
 
                if (no_poll_on_link_down) {
-                       adapter->rx_pkt_burst = dev->rx_pkt_burst;
+                       iavf_rxtx_pkt_burst[dev->data->port_id].rx_burst_raw =
+                               dev->rx_pkt_burst;
                        dev->rx_pkt_burst = iavf_recv_pkts_no_poll;
                }
                return;
@@ -3937,7 +4034,8 @@ iavf_set_rx_function(struct rte_eth_dev *dev)
                dev->rx_pkt_burst = iavf_recv_pkts_vec;
 
                if (no_poll_on_link_down) {
-                       adapter->rx_pkt_burst = dev->rx_pkt_burst;
+                       iavf_rxtx_pkt_burst[dev->data->port_id].rx_burst_raw =
+                               dev->rx_pkt_burst;
                        dev->rx_pkt_burst = iavf_recv_pkts_no_poll;
                }
                return;
@@ -3964,7 +4062,8 @@ iavf_set_rx_function(struct rte_eth_dev *dev)
        }
 
        if (no_poll_on_link_down) {
-               adapter->rx_pkt_burst = dev->rx_pkt_burst;
+               iavf_rxtx_pkt_burst[dev->data->port_id].rx_burst_raw =
+                       dev->rx_pkt_burst;
                dev->rx_pkt_burst = iavf_recv_pkts_no_poll;
        }
 }
@@ -3976,6 +4075,7 @@ iavf_set_tx_function(struct rte_eth_dev *dev)
        struct iavf_adapter *adapter =
                IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
        int no_poll_on_link_down = adapter->devargs.no_poll_on_link_down;
+       int mbuf_check = adapter->devargs.mbuf_check;
 #ifdef RTE_ARCH_X86
        struct iavf_tx_queue *txq;
        int i;
@@ -4063,8 +4163,13 @@ iavf_set_tx_function(struct rte_eth_dev *dev)
                }
 
                if (no_poll_on_link_down) {
-                       adapter->tx_pkt_burst = dev->tx_pkt_burst;
+                       iavf_rxtx_pkt_burst[dev->data->port_id].tx_burst_raw =
+                               dev->tx_pkt_burst;
                        dev->tx_pkt_burst = iavf_xmit_pkts_no_poll;
+               } else if (mbuf_check) {
+                       iavf_rxtx_pkt_burst[dev->data->port_id].tx_burst_raw =
+                               dev->tx_pkt_burst;
+                       dev->tx_pkt_burst = iavf_xmit_pkts_mdd;
                }
                return;
        }
@@ -4077,8 +4182,13 @@ iavf_set_tx_function(struct rte_eth_dev *dev)
        dev->tx_pkt_prepare = iavf_prep_pkts;
 
        if (no_poll_on_link_down) {
-               adapter->tx_pkt_burst = dev->tx_pkt_burst;
+               iavf_rxtx_pkt_burst[dev->data->port_id].tx_burst_raw =
+                       dev->tx_pkt_burst;
                dev->tx_pkt_burst = iavf_xmit_pkts_no_poll;
+       } else if (mbuf_check) {
+               iavf_rxtx_pkt_burst[dev->data->port_id].tx_burst_raw =
+                       dev->tx_pkt_burst;
+               dev->tx_pkt_burst = iavf_xmit_pkts_mdd;
        }
 }
 
diff --git a/drivers/net/iavf/iavf_rxtx.h b/drivers/net/iavf/iavf_rxtx.h
index f432f9d956..ab95bb30c7 100644
--- a/drivers/net/iavf/iavf_rxtx.h
+++ b/drivers/net/iavf/iavf_rxtx.h
@@ -203,6 +203,10 @@ struct iavf_txq_ops {
        void (*release_mbufs)(struct iavf_tx_queue *txq);
 };
 
+struct iavf_pkt_burst {
+       eth_rx_burst_t rx_burst_raw;
+       eth_tx_burst_t tx_burst_raw;
+};
 
 struct iavf_rx_queue_stats {
        uint64_t reserved;
@@ -297,6 +301,8 @@ struct iavf_tx_queue {
        uint16_t next_rs;              /* next to check DD,  for VPMD */
        uint16_t ipsec_crypto_pkt_md_offset;
 
+       uint64_t mdd_pkt_errors;
+
        bool q_set;                    /* if rx queue has been configured */
        bool tx_deferred_start;        /* don't start this queue in dev start */
        const struct iavf_txq_ops *ops;
-- 
2.25.1

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