> -----Original Message-----
> From: Zhang, Qi Z <[email protected]>
> Sent: 2022年11月11日 13:09
> To: Ye, MingjinX <[email protected]>; [email protected]
> Cc: Yang, Qiming <[email protected]>; [email protected]; Zhou, YidingX
> <[email protected]>; Wu, Jingjing <[email protected]>; Lu,
> Wenzhuo <[email protected]>; Ferruh Yigit <[email protected]>; Li,
> Xiaoyun <[email protected]>; Liu, KevinX <[email protected]>
> Subject: RE: [PATCH v3 2/2] net/ice: fix scalar Tx path segment
>
>
>
> > -----Original Message-----
> > From: Ye, MingjinX <[email protected]>
> > Sent: Friday, November 11, 2022 8:04 PM
> > To: [email protected]
> > Cc: Yang, Qiming <[email protected]>; [email protected]; Zhou,
> > YidingX <[email protected]>; Ye, MingjinX
> > <[email protected]>; Zhang, Qi Z <[email protected]>; Wu,
> > Jingjing <[email protected]>; Lu, Wenzhuo <[email protected]>;
> > Ferruh Yigit <[email protected]>; Li, Xiaoyun
> > <[email protected]>; Liu, KevinX <[email protected]>
> > Subject: [PATCH v3 2/2] net/ice: fix scalar Tx path segment
> >
> > The scalar Tx path would send empty buffer that causes the Tx queue to
> > overflow.
> >
> > This patch adds the last buffer length judgment in tx_prepare to fix
> > this issue, rte_errno will be set to EINVAL and returned if the last buffer
> > is
> empty.
> >
> > Fixes: 17c7d0f9d6a4 ("net/ice: support basic Rx/Tx")
> > Fixes: ccf33dccf7aa ("net/ice: check illegal packet sizes")
> > Cc: [email protected]
> >
> > Signed-off-by: Mingjin Ye <[email protected]>
> > ---
> > drivers/net/ice/ice_rxtx.c | 24 ++++++++++++++++++++++++
> > 1 file changed, 24 insertions(+)
> >
> > diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c
> > index e6ddd2513d..69358f6a3a 100644
> > --- a/drivers/net/ice/ice_rxtx.c
> > +++ b/drivers/net/ice/ice_rxtx.c
> > @@ -3643,6 +3643,22 @@ ice_set_tx_function_flag(struct rte_eth_dev
> > *dev, struct ice_tx_queue *txq)
> > #define ICE_MIN_TSO_MSS 64
> > #define ICE_MAX_TSO_MSS 9728
> > #define ICE_MAX_TSO_FRAME_SIZE 262144
> > +
> > +/*Check for invalid mbuf*/
> > +static inline uint16_t
> > +ice_check_mbuf(struct rte_mbuf *tx_pkt) {
>
> Better to name the function to exactly match what it does.
> e.g.: ice_check_emtpy_mbuf
> and also declare it as inline.
will optimize.
>
> > + struct rte_mbuf *txd = tx_pkt;
> > +
> > + while (txd != NULL) {
> > + if (txd->data_len == 0)
> > + return -1;
> > + txd = txd->next;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > uint16_t
> > ice_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
> > uint16_t nb_pkts)
> > @@ -3653,6 +3669,7 @@ ice_prep_pkts(__rte_unused void *tx_queue,
> > struct rte_mbuf **tx_pkts,
> > struct ice_tx_queue *txq = tx_queue;
> > struct rte_eth_dev *dev = &rte_eth_devices[txq->port_id];
> > uint16_t max_frame_size = dev->data->mtu + ICE_ETH_OVERHEAD;
> > + uint16_t nb_used;
> >
> > for (i = 0; i < nb_pkts; i++) {
> > m = tx_pkts[i];
> > @@ -3689,6 +3706,13 @@ ice_prep_pkts(__rte_unused void *tx_queue,
> > struct rte_mbuf **tx_pkts,
> > rte_errno = -ret;
> > return i;
> > }
> > +
> > + if (!(ol_flags & RTE_MBUF_F_TX_TCP_SEG) &&
> > + ice_check_mbuf(m)) {
>
> Why "!(ol_flags & RTE_MBUF_F_TX_TCP_SEG)" is needed here?
> A empty mbuf with TSO enabled is still acceptable?
Should not be expected to be implemented in test-pmd, should detect.
>
> > + rte_errno = EINVAL;
> > + PMD_DRV_LOG(ERR, "INVALID mbuf: last mbuf
> > data_len=[0]");
> > + return i;
> > + }
> > }
> > return i;
> > }
> > --
> > 2.34.1
