From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
To: Jianfeng Tan <jianfeng.tan@intel.com>
Cc: dev@dpdk.org, david.marchand@6wind.com
Subject: Re: [dpdk-dev] [PATCH 4/5] net/virtio-user: add lsc support with vhost-user adapter
Date: Fri, 17 Mar 2017 16:29:12 +0800 [thread overview]
Message-ID: <20170317082912.GI18844@yliu-dev.sh.intel.com> (raw)
In-Reply-To: <1488563803-87754-5-git-send-email-jianfeng.tan@intel.com>
On Fri, Mar 03, 2017 at 05:56:42PM +0000, Jianfeng Tan wrote:
> So far, virtio-user with vhost-user as the backend can only support
> client mode. So when vhost user backend is down, i.e., unix socket
> connection is broken and cannot be re-connected. We will force the
> link state to be down.
>
> Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
> static void
> virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
> void *dst, int length)
> @@ -63,8 +77,27 @@ virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
> return;
> }
>
> - if (offset == offsetof(struct virtio_net_config, status))
> + if (offset == offsetof(struct virtio_net_config, status)) {
> + char buf[128];
> +
> + if (dev->vhostfd >= 0) {
> + int flags;
> + int r;
> +
> + flags = fcntl(dev->vhostfd, F_GETFL);
> + fcntl(dev->vhostfd, F_SETFL, flags | O_NONBLOCK);
> + r = recv(dev->vhostfd, buf, 128, 0);
I think you need specify flag MSG_PEEK, to not consume the data if
there any?
--yliu
> + if (r == 0 || (r < 0 && errno != EAGAIN)) {
> + dev->status &= (~VIRTIO_NET_S_LINK_UP);
> + /* link can never be up again */
> + rte_eal_alarm_set(1, virtio_user_delayed_handler, (void *)hw);
> + } else {
> + dev->status |= VIRTIO_NET_S_LINK_UP;
> + }
> + fcntl(dev->vhostfd, F_SETFL, flags & (~O_NONBLOCK));
> + }
> *(uint16_t *)dst = dev->status;
> + }
>
> if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs))
> *(uint16_t *)dst = dev->max_queue_pairs;
> --
> 2.7.4
next prev parent reply other threads:[~2017-03-17 8:31 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-03 17:56 [dpdk-dev] [PATCH 0/5] add LSC and Rxq interrupt for virtio-user Jianfeng Tan
2017-03-03 17:56 ` [dpdk-dev] [PATCH 1/5] eal/linux: add interrupt type for vdev Jianfeng Tan
2017-03-03 17:56 ` [dpdk-dev] [PATCH 2/5] net/virtio-user: add rxq interrupt mode support Jianfeng Tan
2017-03-17 6:47 ` Yuanhan Liu
2017-03-28 1:33 ` Tan, Jianfeng
2017-03-03 17:56 ` [dpdk-dev] [PATCH 3/5] net/virtio-user: support to report net status Jianfeng Tan
2017-03-17 6:54 ` Yuanhan Liu
2017-03-27 7:46 ` Tan, Jianfeng
2017-03-29 6:33 ` Yuanhan Liu
2017-03-29 7:07 ` Tan, Jianfeng
2017-03-29 7:14 ` Yuanhan Liu
2017-03-29 7:48 ` Tan, Jianfeng
2017-03-29 8:00 ` Yuanhan Liu
2017-03-29 8:33 ` Tan, Jianfeng
2017-03-29 8:36 ` Yuanhan Liu
2017-03-30 3:14 ` Tan, Jianfeng
2017-03-03 17:56 ` [dpdk-dev] [PATCH 4/5] net/virtio-user: add lsc support with vhost-user adapter Jianfeng Tan
2017-03-17 8:29 ` Yuanhan Liu [this message]
2017-03-27 1:51 ` Tan, Jianfeng
2017-03-03 17:56 ` [dpdk-dev] [PATCH 5/5] net/virtio-user: add lsc support with vhost-kernel adapter Jianfeng Tan
2017-03-28 8:21 ` [dpdk-dev] [PATCH v2 0/5] add LSC and Rxq interrupt for virtio-user Jianfeng Tan
2017-03-28 8:21 ` [dpdk-dev] [PATCH v2 1/5] eal/linux: add interrupt type for vdev Jianfeng Tan
2017-03-28 8:21 ` [dpdk-dev] [PATCH v2 2/5] net/virtio: add interrupt configure " Jianfeng Tan
2017-03-29 6:27 ` Yuanhan Liu
2017-03-29 7:03 ` Tan, Jianfeng
2017-03-29 7:09 ` Yuanhan Liu
2017-03-29 7:27 ` Tan, Jianfeng
2017-03-29 7:30 ` Yuanhan Liu
2017-03-28 8:21 ` [dpdk-dev] [PATCH v2 3/5] net/virtio-user: add rxq interrupt mode support Jianfeng Tan
2017-03-28 8:21 ` [dpdk-dev] [PATCH v2 4/5] net/virtio-user: support to report net status Jianfeng Tan
2017-03-28 8:21 ` [dpdk-dev] [PATCH v2 5/5] net/virtio-user: add lsc support Jianfeng Tan
2017-03-31 19:44 ` [dpdk-dev] [PATCH v3 0/5] add LSC and Rxq interrupt for virtio-user Jianfeng Tan
2017-03-31 19:44 ` [dpdk-dev] [PATCH v3 1/5] eal/linux: add interrupt type for vdev Jianfeng Tan
2017-03-31 19:44 ` [dpdk-dev] [PATCH v3 2/5] net/virtio-user: move eventfd open/close into init/uninit Jianfeng Tan
2017-03-31 19:44 ` [dpdk-dev] [PATCH v3 3/5] net/virtio-user: add rxq interrupt mode support Jianfeng Tan
2017-03-31 19:44 ` [dpdk-dev] [PATCH v3 4/5] net/virtio-user: support to report net status Jianfeng Tan
2017-03-31 19:44 ` [dpdk-dev] [PATCH v3 5/5] net/virtio-user: add lsc support Jianfeng Tan
2017-04-01 5:13 ` Yuanhan Liu
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