/* * net/switchdev/switchdev.c - Switch device API * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us> * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include <linux/kernel.h>#include <linux/types.h>#include <linux/init.h>#include <linux/mutex.h>#include <linux/notifier.h>#include <linux/netdevice.h>#include <linux/if_bridge.h>#include <linux/list.h>#include <net/ip_fib.h>#include <net/switchdev.h> /** * switchdev_trans_item_enqueue - Enqueue data item to transaction queue * * @trans: transaction * @data: pointer to data being queued * @destructor: data destructor * @tritem: transaction item being queued * * Enqeueue data item to transaction queue. tritem is typically placed in * cointainter pointed at by data pointer. Destructor is called on * transaction abort and after successful commit phase in case * the caller did not dequeue the item before. */void switchdev_trans_item_enqueue(struct switchdev_trans *trans, void *data, void (*destructor)(void const *), struct switchdev_trans_item *tritem){ tritem->data = data; tritem->destructor = destructor; list_add_tail(&tritem->list, &trans->item_list);}EXPORT_SYMBOL_GPL(switchdev_trans_item_enqueue); static struct switchdev_trans_item *__switchdev_trans_item_dequeue(struct switchdev_trans *trans){ struct switchdev_trans_item *tritem; if (list_empty(&trans->item_list)) return NULL; tritem = list_first_entry(&trans->item_list, struct switchdev_trans_item, list); list_del(&tritem->list); return tritem;} /** * switchdev_trans_item_dequeue - Dequeue data item from transaction queue * * @trans: transaction */void *switchdev_trans_item_dequeue(struct switchdev_trans *trans){ struct switchdev_trans_item *tritem; tritem = __switchdev_trans_item_dequeue(trans); BUG_ON(!tritem); return tritem->data;}EXPORT_SYMBOL_GPL(switchdev_trans_item_dequeue); static void switchdev_trans_init(struct switchdev_trans *trans){ INIT_LIST_HEAD(&trans->item_list);} static void switchdev_trans_items_destroy(struct switchdev_trans *trans){ struct switchdev_trans_item *tritem; while ((tritem = __switchdev_trans_item_dequeue(trans))) tritem->destructor(tritem->data);} static void switchdev_trans_items_warn_destroy(struct net_device *dev, struct switchdev_trans *trans){ WARN(!list_empty(&trans->item_list), "%s: transaction item queue is not empty.\n", dev->name); switchdev_trans_items_destroy(trans);} /** * switchdev_port_attr_get - Get port attribute * * @dev: port device * @attr: attribute to get */int switchdev_port_attr_get(struct net_device *dev, struct switchdev_attr *attr){ const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; struct switchdev_attr first = { .id = SWITCHDEV_ATTR_UNDEFINED }; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_attr_get) return ops->switchdev_port_attr_get(dev, attr); if (attr->flags & SWITCHDEV_F_NO_RECURSE) return err; /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to get attr on * each port. Return -ENODATA if attr values don't * compare across ports. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = switchdev_port_attr_get(lower_dev, attr); if (err) break; if (first.id == SWITCHDEV_ATTR_UNDEFINED) first = *attr; else if (memcmp(&first, attr, sizeof(*attr))) return -ENODATA; } return err;}EXPORT_SYMBOL_GPL(switchdev_port_attr_get); static int __switchdev_port_attr_set(struct net_device *dev, struct switchdev_attr *attr, struct switchdev_trans *trans){ const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_attr_set) return ops->switchdev_port_attr_set(dev, attr, trans); if (attr->flags & SWITCHDEV_F_NO_RECURSE) return err; /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to set attr on * each port. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = __switchdev_port_attr_set(lower_dev, attr, trans); if (err) break; } return err;} struct switchdev_attr_set_work { struct work_struct work; struct net_device *dev; struct switchdev_attr attr;}; static void switchdev_port_attr_set_work(struct work_struct *work){ struct switchdev_attr_set_work *asw = container_of(work, struct switchdev_attr_set_work, work); int err; rtnl_lock(); err = switchdev_port_attr_set(asw->dev, &asw->attr); if (err && err != -EOPNOTSUPP) netdev_err(asw->dev, "failed (err=%d) to set attribute (id=%d)\n", err, asw->attr.id); rtnl_unlock(); dev_put(asw->dev); kfree(work);} static int switchdev_port_attr_set_defer(struct net_device *dev, struct switchdev_attr *attr){ struct switchdev_attr_set_work *asw; asw = kmalloc(sizeof(*asw), GFP_ATOMIC); if (!asw) return -ENOMEM; INIT_WORK(&asw->work, switchdev_port_attr_set_work); dev_hold(dev); asw->dev = dev; memcpy(&asw->attr, attr, sizeof(asw->attr)); schedule_work(&asw->work); return 0;} /** * switchdev_port_attr_set - Set port attribute * * @dev: port device * @attr: attribute to set * * Use a 2-phase prepare-commit transaction model to ensure * system is not left in a partially updated state due to * failure from driver/device. */int switchdev_port_attr_set(struct net_device *dev, struct switchdev_attr *attr){ struct switchdev_trans trans; int err; if (!rtnl_is_locked()) { /* Running prepare-commit transaction across stacked * devices requires nothing moves, so if rtnl_lock is * not held, schedule a worker thread to hold rtnl_lock * while setting attr. */ return switchdev_port_attr_set_defer(dev, attr); } switchdev_trans_init(&trans); /* Phase I: prepare for attr set. Driver/device should fail * here if there are going to be issues in the commit phase, * such as lack of resources or support. The driver/device * should reserve resources needed for the commit phase here, * but should not commit the attr. */ trans.ph_prepare = true; err = __switchdev_port_attr_set(dev, attr, &trans); if (err) { /* Prepare phase failed: abort the transaction. Any * resources reserved in the prepare phase are * released. */ if (err != -EOPNOTSUPP) switchdev_trans_items_destroy(&trans); return err; } /* Phase II: commit attr set. This cannot fail as a fault * of driver/device. If it does, it's a bug in the driver/device * because the driver said everythings was OK in phase I. */ trans.ph_prepare = false; err = __switchdev_port_attr_set(dev, attr, &trans); WARN(err, "%s: Commit of attribute (id=%d) failed.\n", dev->name, attr->id); switchdev_trans_items_warn_destroy(dev, &trans); return err;}EXPORT_SYMBOL_GPL(switchdev_port_attr_set); static int __switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj, struct switchdev_trans *trans){ const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_obj_add) return ops->switchdev_port_obj_add(dev, obj, trans); /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to add object on * each port. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = __switchdev_port_obj_add(lower_dev, obj, trans); if (err) break; } return err;} /** * switchdev_port_obj_add - Add port object * * @dev: port device * @obj: object to add * * Use a 2-phase prepare-commit transaction model to ensure * system is not left in a partially updated state due to * failure from driver/device. * * rtnl_lock must be held. */int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj){ struct switchdev_trans trans; int err; ASSERT_RTNL(); switchdev_trans_init(&trans); /* Phase I: prepare for obj add. Driver/device should fail * here if there are going to be issues in the commit phase, * such as lack of resources or support. The driver/device * should reserve resources needed for the commit phase here, * but should not commit the obj. */ trans.ph_prepare = true; err = __switchdev_port_obj_add(dev, obj, &trans); if (err) { /* Prepare phase failed: abort the transaction. Any * resources reserved in the prepare phase are * released. */ if (err != -EOPNOTSUPP) switchdev_trans_items_destroy(&trans); return err; } /* Phase II: commit obj add. This cannot fail as a fault * of driver/device. If it does, it's a bug in the driver/device * because the driver said everythings was OK in phase I. */ trans.ph_prepare = false; err = __switchdev_port_obj_add(dev, obj, &trans); WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); switchdev_trans_items_warn_destroy(dev, &trans); return err;}EXPORT_SYMBOL_GPL(switchdev_port_obj_add); /** * switchdev_port_obj_del - Delete port object * * @dev: port device * @obj: object to delete */int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj){ const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_obj_del) return ops->switchdev_port_obj_del(dev, obj); /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to delete object on * each port. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = switchdev_port_obj_del(lower_dev, obj); if (err) break; } return err;}EXPORT_SYMBOL_GPL(switchdev_port_obj_del); /** * switchdev_port_obj_dump - Dump port objects * * @dev: port device * @obj: object to dump */int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj){ const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_obj_dump) return ops->switchdev_port_obj_dump(dev, obj); /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to dump objects on * first port at bottom of stack. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = switchdev_port_obj_dump(lower_dev, obj); break; } return err;}EXPORT_SYMBOL_GPL(switchdev_port_obj_dump); static DEFINE_MUTEX(switchdev_mutex);static RAW_NOTIFIER_HEAD(switchdev_notif_chain); /** * register_switchdev_notifier - Register notifier * @nb: notifier_block * * Register switch device notifier. This should be used by code * which needs to monitor events happening in particular device. * Return values are same as for atomic_notifier_chain_register(). */int register_switchdev_notifier(struct notifier_block *nb){ int err; mutex_lock(&switchdev_mutex); err = raw_notifier_chain_register(&switchdev_notif_chain, nb); mutex_unlock(&switchdev_mutex); return err;}EXPORT_SYMBOL_GPL(register_switchdev_notifier); /** * unregister_switchdev_notifier - Unregister notifier * @nb: notifier_block * * Unregister switch device notifier. * Return values are same as for atomic_notifier_chain_unregister(). */int unregister_switchdev_notifier(struct notifier_block *nb){ int err; mutex_lock(&switchdev_mutex); err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); mutex_unlock(&switchdev_mutex); return err;}EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); /** * call_switchdev_notifiers - Call notifiers * @val: value passed unmodified to notifier function * @dev: port device * @info: notifier information data * * Call all network notifier blocks. This should be called by driver * when it needs to propagate hardware event. * Return values are same as for atomic_notifier_call_chain(). */int call_switchdev_notifiers(unsigned long val, struct net_device *dev, struct switchdev_notifier_info *info){ int err; info->dev = dev; mutex_lock(&switchdev_mutex); err = raw_notifier_call_chain(&switchdev_notif_chain, val, info); mutex_unlock(&switchdev_mutex); return err;}EXPORT_SYMBOL_GPL(call_switchdev_notifiers); struct switchdev_vlan_dump { struct switchdev_obj obj; struct sk_buff *skb; u32 filter_mask; u16 flags; u16 begin; u16 end;}; static int switchdev_port_vlan_dump_put(struct switchdev_vlan_dump *dump){ struct bridge_vlan_info vinfo; vinfo.flags = dump->flags; if (dump->begin == 0 && dump->end == 0) { return 0; } else if (dump->begin == dump->end) { vinfo.vid = dump->begin; if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo)) return -EMSGSIZE; } else {Lines 1–500 of 1218. Load more
/* * net/switchdev/switchdev.c - Switch device API * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us> * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include <linux/kernel.h> #include <linux/types.h> #include <linux/init.h> #include <linux/mutex.h> #include <linux/notifier.h> #include <linux/netdevice.h> #include <linux/if_bridge.h> #include <linux/list.h> #include <net/ip_fib.h> #include <net/switchdev.h> /** * switchdev_trans_item_enqueue - Enqueue data item to transaction queue * * @trans: transaction * @data: pointer to data being queued * @destructor: data destructor * @tritem: transaction item being queued * * Enqeueue data item to transaction queue. tritem is typically placed in * cointainter pointed at by data pointer. Destructor is called on * transaction abort and after successful commit phase in case * the caller did not dequeue the item before. */ void switchdev_trans_item_enqueue(struct switchdev_trans *trans, void *data, void (*destructor)(void const *), struct switchdev_trans_item *tritem) { tritem->data = data; tritem->destructor = destructor; list_add_tail(&tritem->list, &trans->item_list); } EXPORT_SYMBOL_GPL(switchdev_trans_item_enqueue); static struct switchdev_trans_item * __switchdev_trans_item_dequeue(struct switchdev_trans *trans) { struct switchdev_trans_item *tritem; if (list_empty(&trans->item_list)) return NULL; tritem = list_first_entry(&trans->item_list, struct switchdev_trans_item, list); list_del(&tritem->list); return tritem; } /** * switchdev_trans_item_dequeue - Dequeue data item from transaction queue * * @trans: transaction */ void *switchdev_trans_item_dequeue(struct switchdev_trans *trans) { struct switchdev_trans_item *tritem; tritem = __switchdev_trans_item_dequeue(trans); BUG_ON(!tritem); return tritem->data; } EXPORT_SYMBOL_GPL(switchdev_trans_item_dequeue); static void switchdev_trans_init(struct switchdev_trans *trans) { INIT_LIST_HEAD(&trans->item_list); } static void switchdev_trans_items_destroy(struct switchdev_trans *trans) { struct switchdev_trans_item *tritem; while ((tritem = __switchdev_trans_item_dequeue(trans))) tritem->destructor(tritem->data); } static void switchdev_trans_items_warn_destroy(struct net_device *dev, struct switchdev_trans *trans) { WARN(!list_empty(&trans->item_list), "%s: transaction item queue is not empty.\n", dev->name); switchdev_trans_items_destroy(trans); } /** * switchdev_port_attr_get - Get port attribute * * @dev: port device * @attr: attribute to get */ int switchdev_port_attr_get(struct net_device *dev, struct switchdev_attr *attr) { const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; struct switchdev_attr first = { .id = SWITCHDEV_ATTR_UNDEFINED }; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_attr_get) return ops->switchdev_port_attr_get(dev, attr); if (attr->flags & SWITCHDEV_F_NO_RECURSE) return err; /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to get attr on * each port. Return -ENODATA if attr values don't * compare across ports. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = switchdev_port_attr_get(lower_dev, attr); if (err) break; if (first.id == SWITCHDEV_ATTR_UNDEFINED) first = *attr; else if (memcmp(&first, attr, sizeof(*attr))) return -ENODATA; } return err; } EXPORT_SYMBOL_GPL(switchdev_port_attr_get); static int __switchdev_port_attr_set(struct net_device *dev, struct switchdev_attr *attr, struct switchdev_trans *trans) { const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_attr_set) return ops->switchdev_port_attr_set(dev, attr, trans); if (attr->flags & SWITCHDEV_F_NO_RECURSE) return err; /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to set attr on * each port. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = __switchdev_port_attr_set(lower_dev, attr, trans); if (err) break; } return err; } struct switchdev_attr_set_work { struct work_struct work; struct net_device *dev; struct switchdev_attr attr; }; static void switchdev_port_attr_set_work(struct work_struct *work) { struct switchdev_attr_set_work *asw = container_of(work, struct switchdev_attr_set_work, work); int err; rtnl_lock(); err = switchdev_port_attr_set(asw->dev, &asw->attr); if (err && err != -EOPNOTSUPP) netdev_err(asw->dev, "failed (err=%d) to set attribute (id=%d)\n", err, asw->attr.id); rtnl_unlock(); dev_put(asw->dev); kfree(work); } static int switchdev_port_attr_set_defer(struct net_device *dev, struct switchdev_attr *attr) { struct switchdev_attr_set_work *asw; asw = kmalloc(sizeof(*asw), GFP_ATOMIC); if (!asw) return -ENOMEM; INIT_WORK(&asw->work, switchdev_port_attr_set_work); dev_hold(dev); asw->dev = dev; memcpy(&asw->attr, attr, sizeof(asw->attr)); schedule_work(&asw->work); return 0; } /** * switchdev_port_attr_set - Set port attribute * * @dev: port device * @attr: attribute to set * * Use a 2-phase prepare-commit transaction model to ensure * system is not left in a partially updated state due to * failure from driver/device. */ int switchdev_port_attr_set(struct net_device *dev, struct switchdev_attr *attr) { struct switchdev_trans trans; int err; if (!rtnl_is_locked()) { /* Running prepare-commit transaction across stacked * devices requires nothing moves, so if rtnl_lock is * not held, schedule a worker thread to hold rtnl_lock * while setting attr. */ return switchdev_port_attr_set_defer(dev, attr); } switchdev_trans_init(&trans); /* Phase I: prepare for attr set. Driver/device should fail * here if there are going to be issues in the commit phase, * such as lack of resources or support. The driver/device * should reserve resources needed for the commit phase here, * but should not commit the attr. */ trans.ph_prepare = true; err = __switchdev_port_attr_set(dev, attr, &trans); if (err) { /* Prepare phase failed: abort the transaction. Any * resources reserved in the prepare phase are * released. */ if (err != -EOPNOTSUPP) switchdev_trans_items_destroy(&trans); return err; } /* Phase II: commit attr set. This cannot fail as a fault * of driver/device. If it does, it's a bug in the driver/device * because the driver said everythings was OK in phase I. */ trans.ph_prepare = false; err = __switchdev_port_attr_set(dev, attr, &trans); WARN(err, "%s: Commit of attribute (id=%d) failed.\n", dev->name, attr->id); switchdev_trans_items_warn_destroy(dev, &trans); return err; } EXPORT_SYMBOL_GPL(switchdev_port_attr_set); static int __switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj, struct switchdev_trans *trans) { const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_obj_add) return ops->switchdev_port_obj_add(dev, obj, trans); /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to add object on * each port. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = __switchdev_port_obj_add(lower_dev, obj, trans); if (err) break; } return err; } /** * switchdev_port_obj_add - Add port object * * @dev: port device * @obj: object to add * * Use a 2-phase prepare-commit transaction model to ensure * system is not left in a partially updated state due to * failure from driver/device. * * rtnl_lock must be held. */ int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj) { struct switchdev_trans trans; int err; ASSERT_RTNL(); switchdev_trans_init(&trans); /* Phase I: prepare for obj add. Driver/device should fail * here if there are going to be issues in the commit phase, * such as lack of resources or support. The driver/device * should reserve resources needed for the commit phase here, * but should not commit the obj. */ trans.ph_prepare = true; err = __switchdev_port_obj_add(dev, obj, &trans); if (err) { /* Prepare phase failed: abort the transaction. Any * resources reserved in the prepare phase are * released. */ if (err != -EOPNOTSUPP) switchdev_trans_items_destroy(&trans); return err; } /* Phase II: commit obj add. This cannot fail as a fault * of driver/device. If it does, it's a bug in the driver/device * because the driver said everythings was OK in phase I. */ trans.ph_prepare = false; err = __switchdev_port_obj_add(dev, obj, &trans); WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); switchdev_trans_items_warn_destroy(dev, &trans); return err; } EXPORT_SYMBOL_GPL(switchdev_port_obj_add); /** * switchdev_port_obj_del - Delete port object * * @dev: port device * @obj: object to delete */ int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj) { const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_obj_del) return ops->switchdev_port_obj_del(dev, obj); /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to delete object on * each port. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = switchdev_port_obj_del(lower_dev, obj); if (err) break; } return err; } EXPORT_SYMBOL_GPL(switchdev_port_obj_del); /** * switchdev_port_obj_dump - Dump port objects * * @dev: port device * @obj: object to dump */ int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj) { const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; if (ops && ops->switchdev_port_obj_dump) return ops->switchdev_port_obj_dump(dev, obj); /* Switch device port(s) may be stacked under * bond/team/vlan dev, so recurse down to dump objects on * first port at bottom of stack. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { err = switchdev_port_obj_dump(lower_dev, obj); break; } return err; } EXPORT_SYMBOL_GPL(switchdev_port_obj_dump); static DEFINE_MUTEX(switchdev_mutex); static RAW_NOTIFIER_HEAD(switchdev_notif_chain); /** * register_switchdev_notifier - Register notifier * @nb: notifier_block * * Register switch device notifier. This should be used by code * which needs to monitor events happening in particular device. * Return values are same as for atomic_notifier_chain_register(). */ int register_switchdev_notifier(struct notifier_block *nb) { int err; mutex_lock(&switchdev_mutex); err = raw_notifier_chain_register(&switchdev_notif_chain, nb); mutex_unlock(&switchdev_mutex); return err; } EXPORT_SYMBOL_GPL(register_switchdev_notifier); /** * unregister_switchdev_notifier - Unregister notifier * @nb: notifier_block * * Unregister switch device notifier. * Return values are same as for atomic_notifier_chain_unregister(). */ int unregister_switchdev_notifier(struct notifier_block *nb) { int err; mutex_lock(&switchdev_mutex); err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); mutex_unlock(&switchdev_mutex); return err; } EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); /** * call_switchdev_notifiers - Call notifiers * @val: value passed unmodified to notifier function * @dev: port device * @info: notifier information data * * Call all network notifier blocks. This should be called by driver * when it needs to propagate hardware event. * Return values are same as for atomic_notifier_call_chain(). */ int call_switchdev_notifiers(unsigned long val, struct net_device *dev, struct switchdev_notifier_info *info) { int err; info->dev = dev; mutex_lock(&switchdev_mutex); err = raw_notifier_call_chain(&switchdev_notif_chain, val, info); mutex_unlock(&switchdev_mutex); return err; } EXPORT_SYMBOL_GPL(call_switchdev_notifiers); struct switchdev_vlan_dump { struct switchdev_obj obj; struct sk_buff *skb; u32 filter_mask; u16 flags; u16 begin; u16 end; }; static int switchdev_port_vlan_dump_put(struct switchdev_vlan_dump *dump) { struct bridge_vlan_info vinfo; vinfo.flags = dump->flags; if (dump->begin == 0 && dump->end == 0) { return 0; } else if (dump->begin == dump->end) { vinfo.vid = dump->begin; if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo)) return -EMSGSIZE; } else {