Re: [PATCH] libxl: do not assume Dom0 backend while getting nic info

[Wei Liu <wei.liu2@citrix.com>]

On Mon, Sep 05, 2016 at 11:26:04AM +0200, Marek Marczykowski-Górecki wrote:
> Fill backend_domid field based on backend path.
> 
> Cc: Ian Jackson <ian.jackson@eu.citrix.com>
> Cc: Wei Liu <wei.liu2@citrix.com>
> Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>

Acked-by: Wei Liu <wei.liu2@citrix.com>

I think this is a backport candidate?

> ---
>  tools/libxl/libxl_nic.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/tools/libxl/libxl_nic.c b/tools/libxl/libxl_nic.c
> index c34b7ba..d1caa90 100644
> --- a/tools/libxl/libxl_nic.c
> +++ b/tools/libxl/libxl_nic.c
> @@ -309,6 +309,18 @@ static int libxl__device_nic_from_xenstore(libxl__gc *gc,
>      else
>          nic->devid = 0;
>  
> +    rc = libxl__xs_read_checked(gc, XBT_NULL,
> +                                GCSPRINTF("%s/backend", libxl_path), &tmp);
> +    if (rc) goto out;
> +
> +    if (!tmp) {
> +        LOG(ERROR, "nic %s does not exist (no backend path)", libxl_path);
> +        rc = ERROR_FAIL;
> +        goto out;
> +    }
> +    rc = libxl__backendpath_parse_domid(gc, tmp, &nic->backend_domid);
> +    if (rc) goto out;
> +
>      /* nic->mtu = */
>  
>      rc = libxl__xs_read_checked(gc, XBT_NULL,
> -- 
> 2.5.5
> 

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