2 * net/switchdev/switchdev.c - Switch device API
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/init.h>
14 #include <linux/mutex.h>
15 #include <linux/notifier.h>
16 #include <linux/netdevice.h>
17 #include <net/switchdev.h>
20 * netdev_switch_parent_id_get - Get ID of a switch
24 * Get ID of a switch this port is part of.
26 int netdev_switch_parent_id_get(struct net_device *dev,
27 struct netdev_phys_item_id *psid)
29 const struct net_device_ops *ops = dev->netdev_ops;
31 if (!ops->ndo_switch_parent_id_get)
33 return ops->ndo_switch_parent_id_get(dev, psid);
35 EXPORT_SYMBOL(netdev_switch_parent_id_get);
38 * netdev_switch_port_stp_update - Notify switch device port of STP
41 * @state: port STP state
43 * Notify switch device port of bridge port STP state change.
45 int netdev_switch_port_stp_update(struct net_device *dev, u8 state)
47 const struct net_device_ops *ops = dev->netdev_ops;
49 if (!ops->ndo_switch_port_stp_update)
51 WARN_ON(!ops->ndo_switch_parent_id_get);
52 return ops->ndo_switch_port_stp_update(dev, state);
54 EXPORT_SYMBOL(netdev_switch_port_stp_update);
56 static DEFINE_MUTEX(netdev_switch_mutex);
57 static RAW_NOTIFIER_HEAD(netdev_switch_notif_chain);
60 * register_netdev_switch_notifier - Register nofifier
63 * Register switch device notifier. This should be used by code
64 * which needs to monitor events happening in particular device.
65 * Return values are same as for atomic_notifier_chain_register().
67 int register_netdev_switch_notifier(struct notifier_block *nb)
71 mutex_lock(&netdev_switch_mutex);
72 err = raw_notifier_chain_register(&netdev_switch_notif_chain, nb);
73 mutex_unlock(&netdev_switch_mutex);
76 EXPORT_SYMBOL(register_netdev_switch_notifier);
79 * unregister_netdev_switch_notifier - Unregister nofifier
82 * Unregister switch device notifier.
83 * Return values are same as for atomic_notifier_chain_unregister().
85 int unregister_netdev_switch_notifier(struct notifier_block *nb)
89 mutex_lock(&netdev_switch_mutex);
90 err = raw_notifier_chain_unregister(&netdev_switch_notif_chain, nb);
91 mutex_unlock(&netdev_switch_mutex);
94 EXPORT_SYMBOL(unregister_netdev_switch_notifier);
97 * call_netdev_switch_notifiers - Call nofifiers
98 * @val: value passed unmodified to notifier function
100 * @info: notifier information data
102 * Call all network notifier blocks. This should be called by driver
103 * when it needs to propagate hardware event.
104 * Return values are same as for atomic_notifier_call_chain().
106 int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,
107 struct netdev_switch_notifier_info *info)
112 mutex_lock(&netdev_switch_mutex);
113 err = raw_notifier_call_chain(&netdev_switch_notif_chain, val, info);
114 mutex_unlock(&netdev_switch_mutex);
117 EXPORT_SYMBOL(call_netdev_switch_notifiers);
120 * netdev_switch_port_bridge_setlink - Notify switch device port of bridge
124 * @nlh: netlink msg with bridge port attributes
125 * @flags: bridge setlink flags
127 * Notify switch device port of bridge port attributes
129 int netdev_switch_port_bridge_setlink(struct net_device *dev,
130 struct nlmsghdr *nlh, u16 flags)
132 const struct net_device_ops *ops = dev->netdev_ops;
134 if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
137 if (!ops->ndo_bridge_setlink)
140 return ops->ndo_bridge_setlink(dev, nlh, flags);
142 EXPORT_SYMBOL(netdev_switch_port_bridge_setlink);
145 * netdev_switch_port_bridge_dellink - Notify switch device port of bridge
146 * port attribute delete
149 * @nlh: netlink msg with bridge port attributes
150 * @flags: bridge setlink flags
152 * Notify switch device port of bridge port attribute delete
154 int netdev_switch_port_bridge_dellink(struct net_device *dev,
155 struct nlmsghdr *nlh, u16 flags)
157 const struct net_device_ops *ops = dev->netdev_ops;
159 if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
162 if (!ops->ndo_bridge_dellink)
165 return ops->ndo_bridge_dellink(dev, nlh, flags);
167 EXPORT_SYMBOL(netdev_switch_port_bridge_dellink);
170 * ndo_dflt_netdev_switch_port_bridge_setlink - default ndo bridge setlink
171 * op for master devices
174 * @nlh: netlink msg with bridge port attributes
175 * @flags: bridge setlink flags
177 * Notify master device slaves of bridge port attributes
179 int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *dev,
180 struct nlmsghdr *nlh, u16 flags)
182 struct net_device *lower_dev;
183 struct list_head *iter;
184 int ret = 0, err = 0;
186 if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
189 netdev_for_each_lower_dev(dev, lower_dev, iter) {
190 err = netdev_switch_port_bridge_setlink(lower_dev, nlh, flags);
191 if (err && err != -EOPNOTSUPP)
197 EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_setlink);
200 * ndo_dflt_netdev_switch_port_bridge_dellink - default ndo bridge dellink
201 * op for master devices
204 * @nlh: netlink msg with bridge port attributes
205 * @flags: bridge dellink flags
207 * Notify master device slaves of bridge port attribute deletes
209 int ndo_dflt_netdev_switch_port_bridge_dellink(struct net_device *dev,
210 struct nlmsghdr *nlh, u16 flags)
212 struct net_device *lower_dev;
213 struct list_head *iter;
214 int ret = 0, err = 0;
216 if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
219 netdev_for_each_lower_dev(dev, lower_dev, iter) {
220 err = netdev_switch_port_bridge_dellink(lower_dev, nlh, flags);
221 if (err && err != -EOPNOTSUPP)
227 EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_dellink);