[PATCH v2 1/4] net/i40e: fix buffer leak on Rx reconfiguration
Zhang, Qi Z
qi.z.zhang at intel.com
Fri Sep 1 09:12:14 CEST 2023
> -----Original Message-----
> From: Richardson, Bruce <bruce.richardson at intel.com>
> Sent: Thursday, August 31, 2023 8:34 PM
> To: dev at dpdk.org
> Cc: Richardson, Bruce <bruce.richardson at intel.com>; Zhang, Qi Z
> <qi.z.zhang at intel.com>; stable at dpdk.org
> Subject: [PATCH v2 1/4] net/i40e: fix buffer leak on Rx reconfiguration
>
> When reconfiguring a single queue on a device, the mbuf initializer value was
> not getting set, and remained at zero. This lead to mbuf leaks as the refcount
> was incorrect (0), so on free it wrapped around to UINT16_MAX. When
> setting up the mbuf initializer, also ensure that the queue is explicitly marked
> as using a vector function by setting the "rx_using_sse" flag.
>
> Fixes: a3c83a2527e1 ("net/i40e: enable runtime queue setup")
> Cc: qi.z.zhang at intel.com
> Cc: stable at dpdk.org
>
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> ---
> drivers/net/i40e/i40e_rxtx.c | 6 ++++++
> drivers/net/i40e/i40e_rxtx_vec_common.h | 1 +
> 2 files changed, 7 insertions(+)
>
> diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c index
> b4f65b58fa..d96bbbb677 100644
> --- a/drivers/net/i40e/i40e_rxtx.c
> +++ b/drivers/net/i40e/i40e_rxtx.c
> @@ -1918,6 +1918,12 @@ i40e_dev_rx_queue_setup_runtime(struct
> rte_eth_dev *dev,
> if (use_def_burst_func)
> ad->rx_bulk_alloc_allowed = false;
> i40e_set_rx_function(dev);
> +
> + if (ad->rx_vec_allowed && i40e_rxq_vec_setup(rxq)) {
> + PMD_DRV_LOG(ERR, "Failed vector rx setup.");
> + return -EINVAL;
> + }
> +
> return 0;
> } else if (ad->rx_vec_allowed && !rte_is_power_of_2(rxq-
> >nb_rx_desc)) {
> PMD_DRV_LOG(ERR, "Vector mode is allowed, but
> descriptor"
> diff --git a/drivers/net/i40e/i40e_rxtx_vec_common.h
> b/drivers/net/i40e/i40e_rxtx_vec_common.h
> index fe1a6ec75e..8b745630e4 100644
> --- a/drivers/net/i40e/i40e_rxtx_vec_common.h
> +++ b/drivers/net/i40e/i40e_rxtx_vec_common.h
> @@ -201,6 +201,7 @@ i40e_rxq_vec_setup_default(struct i40e_rx_queue
> *rxq)
> rte_compiler_barrier();
> p = (uintptr_t)&mb_def.rearm_data;
> rxq->mbuf_initializer = *(uint64_t *)p;
> + rxq->rx_using_sse = 1;
I saw some further code clean can be done by leveraging this change.
> return 0;
> }
>
> --
> 2.39.2
Acked-by: Qi Zhang <qi.z.zhang at intel.com>
Applied to dpdk-next-net-intel.
Thanks
Qi
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