Re: [PATCH net-next v3 11/12] net: dsa: Implement ndo_get_port_parent_id()

Vivien Didelot
2019-02-06T18:21:18Z

Hi Florian,

On Tue, 5 Feb 2019 15:53:25 -0800, Florian Fainelli <f.fainelli@gmail.com> wrote:
> DSA implements SWITCHDEV_ATTR_ID_PORT_PARENT_ID and we want to get rid
> of switchdev_ops eventually, ease that migration by implementing a
> ndo_get_port_parent_id() function which returns what
> switchdev_port_attr_get() would do.
>
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
> ---
> net/dsa/slave.c | 18 ++++++++++++------
> 1 file changed, 12 insertions(+), 6 deletions(-)
>
> diff --git a/net/dsa/slave.c b/net/dsa/slave.c
> index 91de3a663226..70395a0ae52e 100644
> --- a/net/dsa/slave.c
> +++ b/net/dsa/slave.c
> @@ -362,18 +362,23 @@ static int dsa_slave_port_obj_del(struct net_device *dev,
> return err;
> }
>
> -static int dsa_slave_port_attr_get(struct net_device *dev,
> - struct switchdev_attr *attr)
> +static int dsa_slave_get_port_parent_id(struct net_device *dev,
> + struct netdev_phys_item_id *ppid)
> {
> struct dsa_port *dp = dsa_slave_to_port(dev);
> struct dsa_switch *ds = dp->ds;
> struct dsa_switch_tree *dst = ds->dst;
>
> + ppid->id_len = sizeof(dst->index);
> + memcpy(&ppid->id, &dst->index, ppid->id_len);
> +
> + return 0;
> +}

Finally this will give us a way to distinguish two ports with the same switch
and port IDs on a system with two disjoint switch trees, thanks!

Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>