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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: JinYu <jin.yu@intel.com>, dev@dpdk.org
Cc: changpeng.liu@intel.com, tiwei.bie@intel.com,
	zhihong.wang@intel.com, Lin Li <lilin24@baidu.com>,
	Xun Ni <nixun@baidu.com>, Yu Zhang <zhangyu31@baidu.com>
Subject: Re: [dpdk-dev] [PATCH v6 05/10] vhost: checkout and cleanup the resubmit inflight information
Date: Mon, 9 Sep 2019 12:20:57 +0200
Message-ID: <886312e7-b526-d371-5514-a73cacdb36f4@redhat.com> (raw)
In-Reply-To: <20190829141224.49700-6-jin.yu@intel.com>



On 8/29/19 4:12 PM, JinYu wrote:
> This patch shows how to checkout the inflight ring and construct
> the resubmit information also include destroying resubmit info.
> 
> Signed-off-by: Lin Li <lilin24@baidu.com>
> Signed-off-by: Xun Ni <nixun@baidu.com>
> Signed-off-by: Yu Zhang <zhangyu31@baidu.com>
> Signed-off-by: Jin Yu <jin.yu@intel.com>
> ---
>  lib/librte_vhost/rte_vhost.h  |  19 ++++
>  lib/librte_vhost/vhost.c      |  29 ++++-
>  lib/librte_vhost/vhost.h      |   9 ++
>  lib/librte_vhost/vhost_user.c | 197 ++++++++++++++++++++++++++++++++++
>  4 files changed, 253 insertions(+), 1 deletion(-)
> 
...
> +static int
> +vhost_check_queue_inflights_packed(struct virtio_net *dev,
> +						 struct vhost_virtqueue *vq)
> +{
> +	uint16_t i = 0;
> +	uint16_t resubmit_num = 0, old_used_idx, num;
> +	struct rte_vhost_resubmit_info *resubmit = NULL;
> +	struct inflight_info_packed *inflight_packed;
> +
> +	if (!(dev->protocol_features &
> +		(1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
> +		return RTE_VHOST_MSG_RESULT_OK;
> +
> +	if (!vq->inflight_packed->version) {
> +		vq->inflight_packed->version = INFLIGHT_VERSION;
> +		return RTE_VHOST_MSG_RESULT_OK;
> +	}
> +
> +	if ((!vq->inflight_packed))
> +		return RTE_VHOST_MSG_RESULT_ERR;

It needs to be checked before before being dereferenced.

> +
> +	inflight_packed = vq->inflight_packed;
> +	vq->resubmit_inflight = NULL;
> +	vq->global_counter = 0;
> +	old_used_idx = inflight_packed->old_used_idx;
> +
> +	if (inflight_packed->used_idx != old_used_idx) {
> +		if (inflight_packed->desc[old_used_idx].inflight == 0) {
> +			inflight_packed->old_used_idx =
> +				inflight_packed->used_idx;
> +			inflight_packed->old_used_wrap_counter =
> +				inflight_packed->used_wrap_counter;
> +			inflight_packed->old_free_head =
> +				inflight_packed->free_head;
> +		} else {
> +			inflight_packed->used_idx =
> +				inflight_packed->old_used_idx;
> +			inflight_packed->used_wrap_counter =
> +				inflight_packed->old_used_wrap_counter;
> +			inflight_packed->free_head =
> +				inflight_packed->old_free_head;
> +		}
> +	}
> +
> +	for (i = 0; i < inflight_packed->desc_num; i++) {
> +		if (inflight_packed->desc[i].inflight == 1)
> +			resubmit_num++;
> +	}
> +
> +	if (resubmit_num) {
> +		resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
> +		if (resubmit == NULL) {
> +			RTE_LOG(ERR, VHOST_CONFIG,
> +			 "Failed to allocate memory for resubmit info.\n");
> +			return RTE_VHOST_MSG_RESULT_ERR;
> +		}
> +
> +		resubmit->resubmit_list = calloc(resubmit_num,
> +			sizeof(struct rte_vhost_resubmit_desc));
> +		if (resubmit->resubmit_list == NULL) {
> +			RTE_LOG(ERR, VHOST_CONFIG,
> +			 "Failed to allocate memory for resubmit desc.\n");
> +			return RTE_VHOST_MSG_RESULT_ERR;
> +		}
> +
> +		num = 0;
> +		for (i = 0; i < inflight_packed->desc_num; i++) {
> +			if (vq->inflight_packed->desc[i].inflight == 1) {
> +				resubmit->resubmit_list[num].index = i;
> +				resubmit->resubmit_list[num].counter =
> +					inflight_packed->desc[i].counter;
> +				num++;
> +			}
> +		}
> +		resubmit->resubmit_num = num;
> +
> +		if (resubmit->resubmit_num > 1)
> +			qsort(resubmit->resubmit_list, resubmit->resubmit_num,
> +				sizeof(struct rte_vhost_resubmit_desc),
> +				resubmit_desc_compare);
> +
> +		vq->global_counter = resubmit->resubmit_list[0].counter + 1;
> +		vq->resubmit_inflight = resubmit;
> +	}
> +
> +	return RTE_VHOST_MSG_RESULT_OK;
> +}


  reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190806182500.22320>
2019-08-29 14:12 ` [dpdk-dev] [PATCH v6 00/10] vhost: support inflight share memory protocol feature JinYu
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 01/10] vhost: add the inflight description JinYu
2019-09-06 16:37     ` Maxime Coquelin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 02/10] vhost: add packed ring JinYu
2019-09-06 16:42     ` Maxime Coquelin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 03/10] vhost: add the inflight structure JinYu
2019-09-06 16:45     ` Maxime Coquelin
2019-09-09  3:04       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 04/10] vhost: add two new messages to support a shared buffer JinYu
2019-09-06 17:22     ` Maxime Coquelin
2019-09-09  3:06       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 05/10] vhost: checkout and cleanup the resubmit inflight information JinYu
2019-09-09 10:20     ` Maxime Coquelin [this message]
2019-09-11  2:50       ` Yu, Jin
2019-09-11  8:43         ` Maxime Coquelin
2019-09-11  9:07           ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 06/10] vhost: add the APIs to operate inflight ring JinYu
2019-09-11 13:19     ` Kevin Traynor
2019-09-12  9:26     ` Maxime Coquelin
2019-09-16  1:21       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 07/10] vhost: add APIs for user getting " JinYu
2019-09-12  9:28     ` Maxime Coquelin
2019-09-16  1:20       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 08/10] vhost: fix vring functions to support packed ring JinYu
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 09/10] vhost: add an API for judging vq format JinYu
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 10/10] vhost: add vhost-user-blk example which support inflight JinYu
2019-08-30  6:07   ` [dpdk-dev] [PATCH v6 00/10] vhost: support inflight share memory protocol feature Gavin Hu (Arm Technology China)
2019-09-06 16:35   ` Maxime Coquelin
2019-09-09  4:51     ` Yu, Jin

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