From 1cb33af1f75099282a51c4cc0bcc0ad413730079 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Wed, 27 Feb 2019 11:44:25 -0800 Subject: switchdev: Add SWITCHDEV_PORT_ATTR_SET In preparation for allowing switchdev enabled drivers to veto specific attribute settings from within the context of the caller, introduce a new switchdev notifier type for port attributes. Suggested-by: Ido Schimmel Reviewed-by: Ido Schimmel Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- net/switchdev/switchdev.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) (limited to 'net/switchdev') diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 362413c9b389..3560c19aa7e2 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -655,3 +655,54 @@ int switchdev_handle_port_obj_del(struct net_device *dev, return err; } EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del); + +static int __switchdev_handle_port_attr_set(struct net_device *dev, + struct switchdev_notifier_port_attr_info *port_attr_info, + bool (*check_cb)(const struct net_device *dev), + int (*set_cb)(struct net_device *dev, + const struct switchdev_attr *attr, + struct switchdev_trans *trans)) +{ + struct net_device *lower_dev; + struct list_head *iter; + int err = -EOPNOTSUPP; + + if (check_cb(dev)) { + port_attr_info->handled = true; + return set_cb(dev, port_attr_info->attr, + port_attr_info->trans); + } + + /* Switch ports might be stacked under e.g. a LAG. Ignore the + * unsupported devices, another driver might be able to handle them. But + * propagate to the callers any hard errors. + * + * If the driver does its own bookkeeping of stacked ports, it's not + * necessary to go through this helper. + */ + netdev_for_each_lower_dev(dev, lower_dev, iter) { + err = __switchdev_handle_port_attr_set(lower_dev, port_attr_info, + check_cb, set_cb); + if (err && err != -EOPNOTSUPP) + return err; + } + + return err; +} + +int switchdev_handle_port_attr_set(struct net_device *dev, + struct switchdev_notifier_port_attr_info *port_attr_info, + bool (*check_cb)(const struct net_device *dev), + int (*set_cb)(struct net_device *dev, + const struct switchdev_attr *attr, + struct switchdev_trans *trans)) +{ + int err; + + err = __switchdev_handle_port_attr_set(dev, port_attr_info, check_cb, + set_cb); + if (err == -EOPNOTSUPP) + err = 0; + return err; +} +EXPORT_SYMBOL_GPL(switchdev_handle_port_attr_set); -- cgit v1.2.3