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From: "Zhang, Qi Z" <qi.z.zhang@intel.com>
To: "Ye, MingjinX" <mingjinx.ye@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "Yang, Qiming" <qiming.yang@intel.com>,
	"stable@dpdk.org" <stable@dpdk.org>,
	"Zhou, YidingX" <yidingx.zhou@intel.com>,
	"Wu, Jingjing" <jingjing.wu@intel.com>,
	"Lu, Wenzhuo" <wenzhuo.lu@intel.com>,
	Ferruh Yigit <ferruh.yigit@intel.com>,
	"Li, Xiaoyun" <xiaoyun.li@intel.com>,
	"Liu, KevinX" <kevinx.liu@intel.com>
Subject: RE: [PATCH v3 2/2] net/ice: fix scalar Tx path segment
Date: Fri, 11 Nov 2022 05:09:02 +0000	[thread overview]
Message-ID: <DM4PR11MB5994D2CCF3108035C20F46E9D7009@DM4PR11MB5994.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20221111120401.802805-2-mingjinx.ye@intel.com>



> -----Original Message-----
> From: Ye, MingjinX <mingjinx.ye@intel.com>
> Sent: Friday, November 11, 2022 8:04 PM
> To: dev@dpdk.org
> Cc: Yang, Qiming <qiming.yang@intel.com>; stable@dpdk.org; Zhou, YidingX
> <yidingx.zhou@intel.com>; Ye, MingjinX <mingjinx.ye@intel.com>; Zhang, Qi
> Z <qi.z.zhang@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>; Lu,
> Wenzhuo <wenzhuo.lu@intel.com>; Ferruh Yigit <ferruh.yigit@intel.com>; Li,
> Xiaoyun <xiaoyun.li@intel.com>; Liu, KevinX <kevinx.liu@intel.com>
> 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: stable@dpdk.org
> 
> Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
> ---
>  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.

> +	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?

> +			rte_errno = EINVAL;
> +			PMD_DRV_LOG(ERR, "INVALID mbuf:	last mbuf
> data_len=[0]");
> +			return i;
> +		}
>  	}
>  	return i;
>  }
> --
> 2.34.1


  reply	other threads:[~2022-11-11  5:09 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-03 17:20 [PATCH] net/ice: fix scalar Rx and " Mingjin Ye
2022-11-04  6:57 ` Xu, Ke1
2022-11-09 12:56 ` [PATCH v2] " Mingjin Ye
2022-11-10  2:01   ` Xu, Ke1
2022-11-10 10:37   ` Zhang, Qi Z
2022-11-11  3:12     ` Ye, MingjinX
2022-11-11 12:04   ` [PATCH v3 1/2] net/ice: fix scalar Rx " Mingjin Ye
2022-11-11  4:59     ` Zhang, Qi Z
2022-11-11 12:04     ` [PATCH v3 2/2] net/ice: fix scalar Tx " Mingjin Ye
2022-11-11  5:09       ` Zhang, Qi Z [this message]
2022-11-11  8:30         ` Ye, MingjinX
2022-11-11  8:45           ` Zhang, Qi Z
2022-11-11 16:01       ` [PATCH v4 1/2] net/ice: fix scalar Rx " Mingjin Ye
2022-11-11 16:01         ` [PATCH v4 2/2] net/ice: fix scalar Tx " Mingjin Ye
2022-11-11 16:12       ` [PATCH v4 1/2] net/ice: fix scalar Rx " Mingjin Ye
2022-11-11  9:03         ` Zhang, Qi Z
2022-11-11  9:13           ` Xu, Ke1
2022-11-11 16:12         ` [PATCH v4 2/2] net/ice: fix scalar Tx " Mingjin Ye
2022-11-11  9:01           ` Zhang, Qi Z
2022-11-11  9:14             ` Xu, Ke1
2023-09-19  8:15           ` David Marchand
2023-09-27  8:44             ` David Marchand

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