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> unsigned int val; > > - /* mtu setting is forbidden if port is start */ > - if (dev->data->dev_started) { > - PMD_DRV_LOG(ERR, "port %d must be stopped before configuration", > - dev->data->port_id); > - return -EBUSY; > - } > Is it allowed to configure MTU when port is already started? > val = mtu > RTE_ETHER_MTU ? 1 : 0; > AXGMAC_IOWRITE_BITS(pdata, MAC_RCR, JE, val); > > diff --git a/drivers/net/axgbe/axgbe_rxtx.c b/drivers/net/axgbe/axgbe_rxtx.c > index a9ff291cef..68aa67a3fa 100644 > --- a/drivers/net/axgbe/axgbe_rxtx.c > +++ b/drivers/net/axgbe/axgbe_rxtx.c > @@ -210,7 +210,7 @@ axgbe_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, > uint64_t old_dirty = rxq->dirty; > struct rte_mbuf *mbuf, *tmbuf; > unsigned int err, etlt; > - uint32_t error_status; > + uint32_t error_status, max_len; > uint16_t idx, pidx, pkt_len; > > idx = AXGBE_GET_DESC_IDX(rxq, rxq->cur); > @@ -300,6 +300,14 @@ axgbe_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, > | RTE_MBUF_F_RX_IEEE1588_TMST; > pkt_len = AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, > PL) - rxq->crc_len; > + > + /* Be sure we don't exceed the configured MTU */ > + max_len = rxq->pdata->eth_dev->data->mtu + RTE_ETHER_HDR_LEN; > + if (pkt_len > max_len) { > + printf( "packet length exceeds configured MTU\n"); > + goto err_set; > + } > + > Not sure if it is good idea to add above check per packet, can there be a device configuration to limit received packet size. > /* Mbuf populate */ > mbuf->next = NULL; > mbuf->data_off = RTE_PKTMBUF_HEADROOM; > @@ -342,7 +350,7 @@ uint16_t eth_axgbe_recv_scattered_pkts(void *rx_queue, > struct rte_mbuf *first_seg = NULL; > struct rte_mbuf *mbuf, *tmbuf; > unsigned int err = 0, etlt; > - uint32_t error_status = 0; > + uint32_t error_status = 0, max_len = 0; > uint16_t idx, pidx, data_len = 0, pkt_len = 0; > bool eop = 0; > > @@ -409,6 +417,14 @@ uint16_t eth_axgbe_recv_scattered_pkts(void *rx_queue, > } > > } > + > + /* Be sure we don't exceed the configured MTU */ > + max_len = rxq->pdata->eth_dev->data->mtu + RTE_ETHER_HDR_LEN; > + if (pkt_len > max_len) { > + printf( "packet length exceeds configured MTU\n"); > + goto err_set; > + } > + > /* Mbuf populate */ > mbuf->data_off = RTE_PKTMBUF_HEADROOM; > mbuf->data_len = data_len;