On Wed, Oct 7, 2015 at 11:30 AM, Jiri Pirko <j...@resnulli.us> wrote:
> From: Jiri Pirko <j...@mellanox.com>
>
> Caller should know if he can call attr_set directly (when holding RTNL)
> or if he has to use deferred version of this function.
>
> This also allows drivers to sleep inside attr_set and report operation
> status back to switchdev core. Switchdev core then warns if status is
> not ok, instead of silent errors happening in drivers.
>
> Signed-off-by: Jiri Pirko <j...@mellanox.com>
> ---
> include/net/switchdev.h | 2 +
> net/bridge/br_stp.c | 4 +-
> net/switchdev/switchdev.c | 113
> +++++++++++++++++++++++++---------------------
> 3 files changed, 65 insertions(+), 54 deletions(-)
>
> diff --git a/include/net/switchdev.h b/include/net/switchdev.h
> index 89266a3..320be44 100644
> --- a/include/net/switchdev.h
> +++ b/include/net/switchdev.h
> @@ -168,6 +168,8 @@ int switchdev_port_attr_get(struct net_device *dev,
> struct switchdev_attr *attr);
> int switchdev_port_attr_set(struct net_device *dev,
> struct switchdev_attr *attr);
> +int switchdev_port_attr_set_deferred(struct net_device *dev,
> + struct switchdev_attr *attr);
Rather than adding another op, use attr->flags and define:
#define SWITCHDEV_F_DEFERRED BIT(x)
So we get:
void br_set_state(struct net_bridge_port *p, unsigned int state)
{
struct switchdev_attr attr = {
.id = SWITCHDEV_ATTR_ID_PORT_STP_STATE,
+ .flags = SWITCHDEV_F_DEFERRED,
.u.stp_state = state,
};
int err;
p->state = state;
err = switchdev_port_attr_set(p->dev, &attr);
if (err && err != -EOPNOTSUPP)
br_warn(p->br, "error setting offload STP state on
port %u(%s)\n",
(unsigned int) p->port_no,
p->dev->name);
}
(And add obj->flags to do the same).
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