71f4f89a03
The difference between __switchdev_handle_fdb_del_to_device and
switchdev_handle_del_to_device is that the former takes an extra
orig_dev argument, while the latter starts with dev == orig_dev.
We should recurse into the variant that does not lose the orig_dev along
the way. This is relevant when deleting FDB entries pointing towards a
bridge (dev changes to the lower interfaces, but orig_dev shouldn't).
The addition helper already recurses properly, just the deletion one
doesn't.
Fixes: 8ca07176ab ("net: switchdev: introduce a fanout helper for SWITCHDEV_FDB_{ADD,DEL}_TO_DEVICE")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
742 lines
21 KiB
C
742 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* net/switchdev/switchdev.c - Switch device API
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* Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us>
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* Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/notifier.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_bridge.h>
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#include <linux/list.h>
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#include <linux/workqueue.h>
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#include <linux/if_vlan.h>
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#include <linux/rtnetlink.h>
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#include <net/switchdev.h>
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static LIST_HEAD(deferred);
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static DEFINE_SPINLOCK(deferred_lock);
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typedef void switchdev_deferred_func_t(struct net_device *dev,
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const void *data);
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struct switchdev_deferred_item {
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struct list_head list;
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struct net_device *dev;
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switchdev_deferred_func_t *func;
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unsigned long data[];
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};
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static struct switchdev_deferred_item *switchdev_deferred_dequeue(void)
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{
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struct switchdev_deferred_item *dfitem;
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spin_lock_bh(&deferred_lock);
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if (list_empty(&deferred)) {
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dfitem = NULL;
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goto unlock;
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}
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dfitem = list_first_entry(&deferred,
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struct switchdev_deferred_item, list);
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list_del(&dfitem->list);
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unlock:
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spin_unlock_bh(&deferred_lock);
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return dfitem;
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}
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/**
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* switchdev_deferred_process - Process ops in deferred queue
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*
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* Called to flush the ops currently queued in deferred ops queue.
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* rtnl_lock must be held.
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*/
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void switchdev_deferred_process(void)
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{
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struct switchdev_deferred_item *dfitem;
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ASSERT_RTNL();
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while ((dfitem = switchdev_deferred_dequeue())) {
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dfitem->func(dfitem->dev, dfitem->data);
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dev_put(dfitem->dev);
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kfree(dfitem);
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}
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}
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EXPORT_SYMBOL_GPL(switchdev_deferred_process);
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static void switchdev_deferred_process_work(struct work_struct *work)
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{
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rtnl_lock();
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switchdev_deferred_process();
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rtnl_unlock();
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}
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static DECLARE_WORK(deferred_process_work, switchdev_deferred_process_work);
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static int switchdev_deferred_enqueue(struct net_device *dev,
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const void *data, size_t data_len,
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switchdev_deferred_func_t *func)
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{
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struct switchdev_deferred_item *dfitem;
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dfitem = kmalloc(sizeof(*dfitem) + data_len, GFP_ATOMIC);
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if (!dfitem)
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return -ENOMEM;
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dfitem->dev = dev;
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dfitem->func = func;
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memcpy(dfitem->data, data, data_len);
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dev_hold(dev);
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spin_lock_bh(&deferred_lock);
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list_add_tail(&dfitem->list, &deferred);
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spin_unlock_bh(&deferred_lock);
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schedule_work(&deferred_process_work);
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return 0;
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}
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static int switchdev_port_attr_notify(enum switchdev_notifier_type nt,
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struct net_device *dev,
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const struct switchdev_attr *attr,
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struct netlink_ext_ack *extack)
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{
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int err;
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int rc;
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struct switchdev_notifier_port_attr_info attr_info = {
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.attr = attr,
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.handled = false,
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};
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rc = call_switchdev_blocking_notifiers(nt, dev,
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&attr_info.info, extack);
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err = notifier_to_errno(rc);
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if (err) {
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WARN_ON(!attr_info.handled);
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return err;
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}
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if (!attr_info.handled)
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return -EOPNOTSUPP;
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return 0;
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}
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static int switchdev_port_attr_set_now(struct net_device *dev,
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const struct switchdev_attr *attr,
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struct netlink_ext_ack *extack)
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{
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return switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr,
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extack);
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}
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static void switchdev_port_attr_set_deferred(struct net_device *dev,
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const void *data)
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{
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const struct switchdev_attr *attr = data;
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int err;
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err = switchdev_port_attr_set_now(dev, attr, NULL);
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if (err && err != -EOPNOTSUPP)
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netdev_err(dev, "failed (err=%d) to set attribute (id=%d)\n",
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err, attr->id);
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if (attr->complete)
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attr->complete(dev, err, attr->complete_priv);
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}
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static int switchdev_port_attr_set_defer(struct net_device *dev,
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const struct switchdev_attr *attr)
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{
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return switchdev_deferred_enqueue(dev, attr, sizeof(*attr),
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switchdev_port_attr_set_deferred);
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}
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/**
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* switchdev_port_attr_set - Set port attribute
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*
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* @dev: port device
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* @attr: attribute to set
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* @extack: netlink extended ack, for error message propagation
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*
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* rtnl_lock must be held and must not be in atomic section,
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* in case SWITCHDEV_F_DEFER flag is not set.
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*/
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int switchdev_port_attr_set(struct net_device *dev,
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const struct switchdev_attr *attr,
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struct netlink_ext_ack *extack)
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{
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if (attr->flags & SWITCHDEV_F_DEFER)
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return switchdev_port_attr_set_defer(dev, attr);
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ASSERT_RTNL();
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return switchdev_port_attr_set_now(dev, attr, extack);
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}
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EXPORT_SYMBOL_GPL(switchdev_port_attr_set);
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static size_t switchdev_obj_size(const struct switchdev_obj *obj)
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{
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switch (obj->id) {
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case SWITCHDEV_OBJ_ID_PORT_VLAN:
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return sizeof(struct switchdev_obj_port_vlan);
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case SWITCHDEV_OBJ_ID_PORT_MDB:
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return sizeof(struct switchdev_obj_port_mdb);
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case SWITCHDEV_OBJ_ID_HOST_MDB:
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return sizeof(struct switchdev_obj_port_mdb);
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default:
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BUG();
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}
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return 0;
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}
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static int switchdev_port_obj_notify(enum switchdev_notifier_type nt,
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struct net_device *dev,
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const struct switchdev_obj *obj,
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struct netlink_ext_ack *extack)
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{
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int rc;
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int err;
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struct switchdev_notifier_port_obj_info obj_info = {
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.obj = obj,
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.handled = false,
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};
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rc = call_switchdev_blocking_notifiers(nt, dev, &obj_info.info, extack);
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err = notifier_to_errno(rc);
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if (err) {
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WARN_ON(!obj_info.handled);
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return err;
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}
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if (!obj_info.handled)
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return -EOPNOTSUPP;
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return 0;
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}
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static void switchdev_port_obj_add_deferred(struct net_device *dev,
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const void *data)
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{
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const struct switchdev_obj *obj = data;
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int err;
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ASSERT_RTNL();
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err = switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD,
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dev, obj, NULL);
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if (err && err != -EOPNOTSUPP)
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netdev_err(dev, "failed (err=%d) to add object (id=%d)\n",
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err, obj->id);
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if (obj->complete)
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obj->complete(dev, err, obj->complete_priv);
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}
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static int switchdev_port_obj_add_defer(struct net_device *dev,
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const struct switchdev_obj *obj)
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{
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return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj),
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switchdev_port_obj_add_deferred);
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}
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/**
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* switchdev_port_obj_add - Add port object
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*
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* @dev: port device
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* @obj: object to add
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* @extack: netlink extended ack
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*
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* rtnl_lock must be held and must not be in atomic section,
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* in case SWITCHDEV_F_DEFER flag is not set.
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*/
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int switchdev_port_obj_add(struct net_device *dev,
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const struct switchdev_obj *obj,
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struct netlink_ext_ack *extack)
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{
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if (obj->flags & SWITCHDEV_F_DEFER)
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return switchdev_port_obj_add_defer(dev, obj);
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ASSERT_RTNL();
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return switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD,
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dev, obj, extack);
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}
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EXPORT_SYMBOL_GPL(switchdev_port_obj_add);
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static int switchdev_port_obj_del_now(struct net_device *dev,
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const struct switchdev_obj *obj)
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{
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return switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_DEL,
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dev, obj, NULL);
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}
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static void switchdev_port_obj_del_deferred(struct net_device *dev,
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const void *data)
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{
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const struct switchdev_obj *obj = data;
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int err;
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err = switchdev_port_obj_del_now(dev, obj);
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if (err && err != -EOPNOTSUPP)
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netdev_err(dev, "failed (err=%d) to del object (id=%d)\n",
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err, obj->id);
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if (obj->complete)
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obj->complete(dev, err, obj->complete_priv);
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}
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static int switchdev_port_obj_del_defer(struct net_device *dev,
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const struct switchdev_obj *obj)
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{
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return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj),
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switchdev_port_obj_del_deferred);
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}
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/**
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* switchdev_port_obj_del - Delete port object
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*
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* @dev: port device
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* @obj: object to delete
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*
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* rtnl_lock must be held and must not be in atomic section,
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* in case SWITCHDEV_F_DEFER flag is not set.
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*/
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int switchdev_port_obj_del(struct net_device *dev,
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const struct switchdev_obj *obj)
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{
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if (obj->flags & SWITCHDEV_F_DEFER)
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return switchdev_port_obj_del_defer(dev, obj);
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ASSERT_RTNL();
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return switchdev_port_obj_del_now(dev, obj);
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}
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EXPORT_SYMBOL_GPL(switchdev_port_obj_del);
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static ATOMIC_NOTIFIER_HEAD(switchdev_notif_chain);
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static BLOCKING_NOTIFIER_HEAD(switchdev_blocking_notif_chain);
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/**
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* register_switchdev_notifier - Register notifier
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* @nb: notifier_block
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*
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* Register switch device notifier.
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*/
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int register_switchdev_notifier(struct notifier_block *nb)
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{
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return atomic_notifier_chain_register(&switchdev_notif_chain, nb);
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}
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EXPORT_SYMBOL_GPL(register_switchdev_notifier);
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/**
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* unregister_switchdev_notifier - Unregister notifier
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* @nb: notifier_block
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*
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* Unregister switch device notifier.
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*/
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int unregister_switchdev_notifier(struct notifier_block *nb)
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{
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return atomic_notifier_chain_unregister(&switchdev_notif_chain, nb);
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}
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EXPORT_SYMBOL_GPL(unregister_switchdev_notifier);
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/**
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* call_switchdev_notifiers - Call notifiers
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* @val: value passed unmodified to notifier function
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* @dev: port device
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* @info: notifier information data
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* @extack: netlink extended ack
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* Call all network notifier blocks.
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*/
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int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
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struct switchdev_notifier_info *info,
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struct netlink_ext_ack *extack)
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{
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info->dev = dev;
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info->extack = extack;
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return atomic_notifier_call_chain(&switchdev_notif_chain, val, info);
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}
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EXPORT_SYMBOL_GPL(call_switchdev_notifiers);
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int register_switchdev_blocking_notifier(struct notifier_block *nb)
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{
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struct blocking_notifier_head *chain = &switchdev_blocking_notif_chain;
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return blocking_notifier_chain_register(chain, nb);
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}
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EXPORT_SYMBOL_GPL(register_switchdev_blocking_notifier);
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int unregister_switchdev_blocking_notifier(struct notifier_block *nb)
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{
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struct blocking_notifier_head *chain = &switchdev_blocking_notif_chain;
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return blocking_notifier_chain_unregister(chain, nb);
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}
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EXPORT_SYMBOL_GPL(unregister_switchdev_blocking_notifier);
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int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
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struct switchdev_notifier_info *info,
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struct netlink_ext_ack *extack)
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{
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info->dev = dev;
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info->extack = extack;
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return blocking_notifier_call_chain(&switchdev_blocking_notif_chain,
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val, info);
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}
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EXPORT_SYMBOL_GPL(call_switchdev_blocking_notifiers);
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static int __switchdev_handle_fdb_add_to_device(struct net_device *dev,
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const struct net_device *orig_dev,
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const struct switchdev_notifier_fdb_info *fdb_info,
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bool (*check_cb)(const struct net_device *dev),
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bool (*foreign_dev_check_cb)(const struct net_device *dev,
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const struct net_device *foreign_dev),
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int (*add_cb)(struct net_device *dev,
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const struct net_device *orig_dev, const void *ctx,
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const struct switchdev_notifier_fdb_info *fdb_info),
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int (*lag_add_cb)(struct net_device *dev,
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const struct net_device *orig_dev, const void *ctx,
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const struct switchdev_notifier_fdb_info *fdb_info))
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{
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const struct switchdev_notifier_info *info = &fdb_info->info;
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struct net_device *lower_dev;
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struct list_head *iter;
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int err = -EOPNOTSUPP;
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if (check_cb(dev)) {
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/* Handle FDB entries on foreign interfaces as FDB entries
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* towards the software bridge.
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*/
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if (foreign_dev_check_cb && foreign_dev_check_cb(dev, orig_dev)) {
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struct net_device *br = netdev_master_upper_dev_get_rcu(dev);
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if (!br || !netif_is_bridge_master(br))
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return 0;
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/* No point in handling FDB entries on a foreign bridge */
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if (foreign_dev_check_cb(dev, br))
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return 0;
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return __switchdev_handle_fdb_add_to_device(br, orig_dev,
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fdb_info, check_cb,
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foreign_dev_check_cb,
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add_cb, lag_add_cb);
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}
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return add_cb(dev, orig_dev, info->ctx, fdb_info);
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}
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/* If we passed over the foreign check, it means that the LAG interface
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* is offloaded.
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*/
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if (netif_is_lag_master(dev)) {
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if (!lag_add_cb)
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return -EOPNOTSUPP;
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return lag_add_cb(dev, orig_dev, info->ctx, fdb_info);
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}
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|
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/* Recurse through lower interfaces in case the FDB entry is pointing
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* towards a bridge device.
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*/
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netdev_for_each_lower_dev(dev, lower_dev, iter) {
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/* Do not propagate FDB entries across bridges */
|
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if (netif_is_bridge_master(lower_dev))
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continue;
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|
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err = __switchdev_handle_fdb_add_to_device(lower_dev, orig_dev,
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fdb_info, check_cb,
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foreign_dev_check_cb,
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add_cb, lag_add_cb);
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if (err && err != -EOPNOTSUPP)
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return err;
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}
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|
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return err;
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}
|
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|
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int switchdev_handle_fdb_add_to_device(struct net_device *dev,
|
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const struct switchdev_notifier_fdb_info *fdb_info,
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bool (*check_cb)(const struct net_device *dev),
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bool (*foreign_dev_check_cb)(const struct net_device *dev,
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const struct net_device *foreign_dev),
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int (*add_cb)(struct net_device *dev,
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const struct net_device *orig_dev, const void *ctx,
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const struct switchdev_notifier_fdb_info *fdb_info),
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int (*lag_add_cb)(struct net_device *dev,
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const struct net_device *orig_dev, const void *ctx,
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const struct switchdev_notifier_fdb_info *fdb_info))
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|
{
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int err;
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err = __switchdev_handle_fdb_add_to_device(dev, dev, fdb_info,
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check_cb,
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foreign_dev_check_cb,
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add_cb, lag_add_cb);
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if (err == -EOPNOTSUPP)
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err = 0;
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return err;
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}
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EXPORT_SYMBOL_GPL(switchdev_handle_fdb_add_to_device);
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|
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static int __switchdev_handle_fdb_del_to_device(struct net_device *dev,
|
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const struct net_device *orig_dev,
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const struct switchdev_notifier_fdb_info *fdb_info,
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bool (*check_cb)(const struct net_device *dev),
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bool (*foreign_dev_check_cb)(const struct net_device *dev,
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const struct net_device *foreign_dev),
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int (*del_cb)(struct net_device *dev,
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const struct net_device *orig_dev, const void *ctx,
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const struct switchdev_notifier_fdb_info *fdb_info),
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int (*lag_del_cb)(struct net_device *dev,
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const struct net_device *orig_dev, const void *ctx,
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const struct switchdev_notifier_fdb_info *fdb_info))
|
|
{
|
|
const struct switchdev_notifier_info *info = &fdb_info->info;
|
|
struct net_device *lower_dev;
|
|
struct list_head *iter;
|
|
int err = -EOPNOTSUPP;
|
|
|
|
if (check_cb(dev)) {
|
|
/* Handle FDB entries on foreign interfaces as FDB entries
|
|
* towards the software bridge.
|
|
*/
|
|
if (foreign_dev_check_cb && foreign_dev_check_cb(dev, orig_dev)) {
|
|
struct net_device *br = netdev_master_upper_dev_get_rcu(dev);
|
|
|
|
if (!br || !netif_is_bridge_master(br))
|
|
return 0;
|
|
|
|
/* No point in handling FDB entries on a foreign bridge */
|
|
if (foreign_dev_check_cb(dev, br))
|
|
return 0;
|
|
|
|
return __switchdev_handle_fdb_del_to_device(br, orig_dev,
|
|
fdb_info, check_cb,
|
|
foreign_dev_check_cb,
|
|
del_cb, lag_del_cb);
|
|
}
|
|
|
|
return del_cb(dev, orig_dev, info->ctx, fdb_info);
|
|
}
|
|
|
|
/* If we passed over the foreign check, it means that the LAG interface
|
|
* is offloaded.
|
|
*/
|
|
if (netif_is_lag_master(dev)) {
|
|
if (!lag_del_cb)
|
|
return -EOPNOTSUPP;
|
|
|
|
return lag_del_cb(dev, orig_dev, info->ctx, fdb_info);
|
|
}
|
|
|
|
/* Recurse through lower interfaces in case the FDB entry is pointing
|
|
* towards a bridge device.
|
|
*/
|
|
netdev_for_each_lower_dev(dev, lower_dev, iter) {
|
|
/* Do not propagate FDB entries across bridges */
|
|
if (netif_is_bridge_master(lower_dev))
|
|
continue;
|
|
|
|
err = __switchdev_handle_fdb_del_to_device(lower_dev, orig_dev,
|
|
fdb_info, check_cb,
|
|
foreign_dev_check_cb,
|
|
del_cb, lag_del_cb);
|
|
if (err && err != -EOPNOTSUPP)
|
|
return err;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int switchdev_handle_fdb_del_to_device(struct net_device *dev,
|
|
const struct switchdev_notifier_fdb_info *fdb_info,
|
|
bool (*check_cb)(const struct net_device *dev),
|
|
bool (*foreign_dev_check_cb)(const struct net_device *dev,
|
|
const struct net_device *foreign_dev),
|
|
int (*del_cb)(struct net_device *dev,
|
|
const struct net_device *orig_dev, const void *ctx,
|
|
const struct switchdev_notifier_fdb_info *fdb_info),
|
|
int (*lag_del_cb)(struct net_device *dev,
|
|
const struct net_device *orig_dev, const void *ctx,
|
|
const struct switchdev_notifier_fdb_info *fdb_info))
|
|
{
|
|
int err;
|
|
|
|
err = __switchdev_handle_fdb_del_to_device(dev, dev, fdb_info,
|
|
check_cb,
|
|
foreign_dev_check_cb,
|
|
del_cb, lag_del_cb);
|
|
if (err == -EOPNOTSUPP)
|
|
err = 0;
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(switchdev_handle_fdb_del_to_device);
|
|
|
|
static int __switchdev_handle_port_obj_add(struct net_device *dev,
|
|
struct switchdev_notifier_port_obj_info *port_obj_info,
|
|
bool (*check_cb)(const struct net_device *dev),
|
|
int (*add_cb)(struct net_device *dev, const void *ctx,
|
|
const struct switchdev_obj *obj,
|
|
struct netlink_ext_ack *extack))
|
|
{
|
|
struct switchdev_notifier_info *info = &port_obj_info->info;
|
|
struct netlink_ext_ack *extack;
|
|
struct net_device *lower_dev;
|
|
struct list_head *iter;
|
|
int err = -EOPNOTSUPP;
|
|
|
|
extack = switchdev_notifier_info_to_extack(info);
|
|
|
|
if (check_cb(dev)) {
|
|
err = add_cb(dev, info->ctx, port_obj_info->obj, extack);
|
|
if (err != -EOPNOTSUPP)
|
|
port_obj_info->handled = true;
|
|
return err;
|
|
}
|
|
|
|
/* 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) {
|
|
if (netif_is_bridge_master(lower_dev))
|
|
continue;
|
|
|
|
err = __switchdev_handle_port_obj_add(lower_dev, port_obj_info,
|
|
check_cb, add_cb);
|
|
if (err && err != -EOPNOTSUPP)
|
|
return err;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int switchdev_handle_port_obj_add(struct net_device *dev,
|
|
struct switchdev_notifier_port_obj_info *port_obj_info,
|
|
bool (*check_cb)(const struct net_device *dev),
|
|
int (*add_cb)(struct net_device *dev, const void *ctx,
|
|
const struct switchdev_obj *obj,
|
|
struct netlink_ext_ack *extack))
|
|
{
|
|
int err;
|
|
|
|
err = __switchdev_handle_port_obj_add(dev, port_obj_info, check_cb,
|
|
add_cb);
|
|
if (err == -EOPNOTSUPP)
|
|
err = 0;
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_add);
|
|
|
|
static int __switchdev_handle_port_obj_del(struct net_device *dev,
|
|
struct switchdev_notifier_port_obj_info *port_obj_info,
|
|
bool (*check_cb)(const struct net_device *dev),
|
|
int (*del_cb)(struct net_device *dev, const void *ctx,
|
|
const struct switchdev_obj *obj))
|
|
{
|
|
struct switchdev_notifier_info *info = &port_obj_info->info;
|
|
struct net_device *lower_dev;
|
|
struct list_head *iter;
|
|
int err = -EOPNOTSUPP;
|
|
|
|
if (check_cb(dev)) {
|
|
err = del_cb(dev, info->ctx, port_obj_info->obj);
|
|
if (err != -EOPNOTSUPP)
|
|
port_obj_info->handled = true;
|
|
return err;
|
|
}
|
|
|
|
/* 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) {
|
|
if (netif_is_bridge_master(lower_dev))
|
|
continue;
|
|
|
|
err = __switchdev_handle_port_obj_del(lower_dev, port_obj_info,
|
|
check_cb, del_cb);
|
|
if (err && err != -EOPNOTSUPP)
|
|
return err;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int switchdev_handle_port_obj_del(struct net_device *dev,
|
|
struct switchdev_notifier_port_obj_info *port_obj_info,
|
|
bool (*check_cb)(const struct net_device *dev),
|
|
int (*del_cb)(struct net_device *dev, const void *ctx,
|
|
const struct switchdev_obj *obj))
|
|
{
|
|
int err;
|
|
|
|
err = __switchdev_handle_port_obj_del(dev, port_obj_info, check_cb,
|
|
del_cb);
|
|
if (err == -EOPNOTSUPP)
|
|
err = 0;
|
|
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 void *ctx,
|
|
const struct switchdev_attr *attr,
|
|
struct netlink_ext_ack *extack))
|
|
{
|
|
struct switchdev_notifier_info *info = &port_attr_info->info;
|
|
struct netlink_ext_ack *extack;
|
|
struct net_device *lower_dev;
|
|
struct list_head *iter;
|
|
int err = -EOPNOTSUPP;
|
|
|
|
extack = switchdev_notifier_info_to_extack(info);
|
|
|
|
if (check_cb(dev)) {
|
|
err = set_cb(dev, info->ctx, port_attr_info->attr, extack);
|
|
if (err != -EOPNOTSUPP)
|
|
port_attr_info->handled = true;
|
|
return err;
|
|
}
|
|
|
|
/* 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) {
|
|
if (netif_is_bridge_master(lower_dev))
|
|
continue;
|
|
|
|
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 void *ctx,
|
|
const struct switchdev_attr *attr,
|
|
struct netlink_ext_ack *extack))
|
|
{
|
|
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);
|