Re: [PATCH RFC 2/2] libxl: set net device prefix

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On Wed, Jan 20, 2016 at 11:41:27PM +0000, Joao Martins wrote:
> Use the newly added virCapabilitiesSetNetPrefix to set
> the network prefix for the driver. This in return will
> be use by NetDefFormat() and NetDefParseXML() routines
> to free any interface name that start with the registered
> prefix.
> 
> Signed-off-by: Joao Martins <joao.m.martins@xxxxxxxxxx>
> ---
>  src/libxl/libxl_conf.c | 3 +++
>  src/libxl/libxl_conf.h | 4 ++++
>  2 files changed, 7 insertions(+)
> 
> diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
> index 6320421..d7fb533 100644
> --- a/src/libxl/libxl_conf.c
> +++ b/src/libxl/libxl_conf.c
> @@ -183,6 +183,9 @@ libxlCapsInitHost(libxl_ctx *ctx, virCapsPtr caps)
>          virCapabilitiesAddHostFeature(caps, "pae") < 0)
>          return -1;
>  
> +    if (virCapabilitiesSetNetPrefix(caps, LIBXL_GENERATED_PREFIX_XEN) < 0)
> +        return -1;
> +
>      return 0;
>  }
>  
> diff --git a/src/libxl/libxl_conf.h b/src/libxl/libxl_conf.h
> index 7c68b2b..6ad9ad3 100644
> --- a/src/libxl/libxl_conf.h
> +++ b/src/libxl/libxl_conf.h
> @@ -47,6 +47,10 @@
>  # define LIBXL_MIGRATION_PORT_MIN  49152
>  # define LIBXL_MIGRATION_PORT_MAX  49216
>  
> +/* Used for prefix of ifname of any network name generated dynamically
> + * by libvirt for Xen, and cannot be used for a persistent network name.  */
> +# define LIBXL_GENERATED_PREFIX_XEN "vif"
> +
>  # define LIBXL_CONFIG_BASE_DIR SYSCONFDIR "/libvirt"
>  # define LIBXL_CONFIG_DIR SYSCONFDIR "/libvirt/libxl"
>  # define LIBXL_AUTOSTART_DIR LIBXL_CONFIG_DIR "/autostart"

ACK

Regards,
Daniel
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