[dpdk-dev] [PATCH] vhost: log Virtio and Vhost-user negotiated features

[Tiwei Bie]

On Thu, Jun 20, 2019 at 10:07:12PM +0200, Maxime Coquelin wrote:
> Having this info logged by default when analysing bug reports
> has proved to be useful.
> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
> ---
>  lib/librte_vhost/vhost_user.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> index c9e29ece8..370864865 100644
> --- a/lib/librte_vhost/vhost_user.c
> +++ b/lib/librte_vhost/vhost_user.c
> @@ -284,6 +284,8 @@ vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
>  	} else {
>  		dev->vhost_hlen = sizeof(struct virtio_net_hdr);
>  	}
> +	RTE_LOG(INFO, VHOST_CONFIG,
> +		"Negotiated Virtio features: 0x%" PRIx64 "\n", dev->features);

Might be better to use lowercase for "Negotiated", and we will
get more consistent messages like this:

VHOST_CONFIG: new vhost user connection is 278
VHOST_CONFIG: new device, handle is 0
VHOST_CONFIG: read message VHOST_USER_SET_OWNER
VHOST_CONFIG: read message VHOST_USER_GET_FEATURES
VHOST_CONFIG: read message VHOST_USER_SET_VRING_CALL
VHOST_CONFIG: vring call idx:0 file:279
VHOST_CONFIG: read message VHOST_USER_SET_VRING_CALL
VHOST_CONFIG: vring call idx:1 file:280
VHOST_CONFIG: read message VHOST_USER_SET_FEATURES
VHOST_CONFIG: negotiated Virtio features: 0xd10008000
VHOST_CONFIG: read message VHOST_USER_SET_MEM_TABLE
VHOST_CONFIG: guest memory region 0, size: 0x20000000
......

instead of:

VHOST_CONFIG: new vhost user connection is 278
VHOST_CONFIG: new device, handle is 0
VHOST_CONFIG: read message VHOST_USER_SET_OWNER
VHOST_CONFIG: read message VHOST_USER_GET_FEATURES
VHOST_CONFIG: read message VHOST_USER_SET_VRING_CALL
VHOST_CONFIG: vring call idx:0 file:279
VHOST_CONFIG: read message VHOST_USER_SET_VRING_CALL
VHOST_CONFIG: vring call idx:1 file:280
VHOST_CONFIG: read message VHOST_USER_SET_FEATURES
VHOST_CONFIG: Negotiated Virtio features: 0xd10008000
VHOST_CONFIG: read message VHOST_USER_SET_MEM_TABLE
VHOST_CONFIG: guest memory region 0, size: 0x20000000
......

>  	VHOST_LOG_DEBUG(VHOST_CONFIG,
>  		"(%d) mergeable RX buffers %s, virtio 1 %s\n",
>  		dev->vid,
> @@ -1406,6 +1408,9 @@ vhost_user_set_protocol_features(struct virtio_net **pdev,
>  	}
>  
>  	dev->protocol_features = protocol_features;
> +	RTE_LOG(INFO, VHOST_CONFIG,
> +		"Negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
> +		dev->protocol_features);

Ditto.

Other than that,
Reviewed-by: Tiwei Bie <tiwei.bie at intel.com>

Thanks,
Tiwei

>  
>  	return RTE_VHOST_MSG_RESULT_OK;
>  }
> -- 
> 2.21.0
>