[ovs-dev] [PATCH v2] netdev-dpdk: add vhost-user get_status.

[Stokes, Ian]

> -----Original Message-----
> From: ovs-dev-bounces at openvswitch.org [mailto:ovs-dev-
> bounces at openvswitch.org] On Behalf Of Flavio Leitner
> Sent: Tuesday, January 16, 2018 4:22 AM
> To: dev at openvswitch.org
> Subject: [ovs-dev] [PATCH v2] netdev-dpdk: add vhost-user get_status.
> 
> Expose relevant vhost-user information in status.
> 	

Thanks for this Flavio, very useful feature.

Just a query, when status update is called, I assume it updates the OVSDB?

Is there any command a user can use to get this info in one query?

For example some of this info is contained when a user calls ovs-ctl list interface 'vhostuser-interface'.

I looked at the docs but I didn't see any ovs-ctl or ovs-appctl command that returned all the info gathered here in one place?

Ian
> Signed-off-by: Flavio Leitner <fbl at sysclose.org>
> ---
>  NEWS              |  1 +
>  lib/netdev-dpdk.c | 62
> +++++++++++++++++++++++++++++++++++++++++++++++++++++--
>  2 files changed, 61 insertions(+), 2 deletions(-)
> 
> Changelog:
> V2 - Dropped the custom appctl command in favor of get_status.
> 
> diff --git a/NEWS b/NEWS
> index cb020d00d..2bf0bde82 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -47,6 +47,7 @@ Post-v2.8.0
>       * Configuring a controller, or unconfiguring all controllers, now
> deletes
>         all groups and meters (as well as all flows).
>     - New --enable-sparse configure option enables "sparse" checking by
> default.
> +   - Added additional information to vhost-user status.
> 
>  v2.8.0 - 31 Aug 2017
>  --------------------
> diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c index
> e32c7f678..cbf4a9c0a 100644
> --- a/lib/netdev-dpdk.c
> +++ b/lib/netdev-dpdk.c
> @@ -2614,6 +2614,64 @@ netdev_dpdk_update_flags(struct netdev *netdev,
>      return error;
>  }
> 
> +static int
> +netdev_dpdk_vhost_user_get_status(const struct netdev *netdev,
> +                                  struct smap *args) {
> +    struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
> +
> +    ovs_mutex_lock(&dev->mutex);
> +
> +    bool client_mode = dev->vhost_driver_flags & RTE_VHOST_USER_CLIENT;
> +    smap_add_format(args, "mode", "%s", client_mode ? "client" :
> + "server");
> +
> +    int vid = netdev_dpdk_get_vid(dev);
> +    if (vid < 0) {
> +        smap_add_format(args, "status", "disconnected");
> +        ovs_mutex_unlock(&dev->mutex);
> +        return 0;
> +    } else {
> +        smap_add_format(args, "status", "connected");
> +    }
> +
> +    char socket_name[PATH_MAX];
> +    if (!rte_vhost_get_ifname(vid, socket_name, PATH_MAX)) {
> +        smap_add_format(args, "socket", "%s", socket_name);
> +    }
> +
> +    uint64_t features;
> +    if (!rte_vhost_get_negotiated_features(vid, &features)) {
> +        smap_add_format(args, "features", "0x%016"PRIx64, features);
> +    }
> +
> +    uint16_t mtu;
> +    if (!rte_vhost_get_mtu(vid, &mtu)) {
> +        smap_add_format(args, "mtu", "%d", mtu);
> +    }
> +
> +    int numa = rte_vhost_get_numa_node(vid);
> +    if (numa >= 0) {
> +        smap_add_format(args, "numa", "%d", numa);
> +    }
> +
> +    uint16_t vring_num = rte_vhost_get_vring_num(vid);
> +    if (vring_num) {
> +        smap_add_format(args, "num_of_vrings", "%d", vring_num);
> +    }
> +
> +    for (int i = 0; i < vring_num; i++) {
> +        struct rte_vhost_vring vring;
> +        char vhost_vring[16];
> +
> +        rte_vhost_get_vhost_vring(vid, i, &vring);
> +        snprintf(vhost_vring, 16, "vring_%d_size", i);
> +        smap_add_format(args, vhost_vring, "%d", vring.size);
> +    }
> +
> +    ovs_mutex_unlock(&dev->mutex);
> +    return 0;
> +}
> +
>  static int
>  netdev_dpdk_get_status(const struct netdev *netdev, struct smap *args)  {
> @@ -3698,7 +3756,7 @@ static const struct netdev_class dpdk_vhost_class =
>          netdev_dpdk_vhost_get_stats,
>          NULL,
>          NULL,
> -        NULL,
> +        netdev_dpdk_vhost_user_get_status,
>          netdev_dpdk_vhost_reconfigure,
>          netdev_dpdk_vhost_rxq_recv);
>  static const struct netdev_class dpdk_vhost_client_class = @@ -3714,7
> +3772,7 @@ static const struct netdev_class dpdk_vhost_client_class =
>          netdev_dpdk_vhost_get_stats,
>          NULL,
>          NULL,
> -        NULL,
> +        netdev_dpdk_vhost_user_get_status,
>          netdev_dpdk_vhost_client_reconfigure,
>          netdev_dpdk_vhost_rxq_recv);
> 
> --
> 2.14.3
> 
> 
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