diff options
Diffstat (limited to 'kernel/net/switchdev/switchdev.c')
| -rw-r--r-- | kernel/net/switchdev/switchdev.c | 1290 |
1 files changed, 1129 insertions, 161 deletions
diff --git a/kernel/net/switchdev/switchdev.c b/kernel/net/switchdev/switchdev.c index 055453d48..d5d7132ac 100644 --- a/kernel/net/switchdev/switchdev.c +++ b/kernel/net/switchdev/switchdev.c @@ -1,6 +1,6 @@ /* * net/switchdev/switchdev.c - Switch device API - * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us> + * 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 @@ -15,97 +15,598 @@ #include <linux/mutex.h> #include <linux/notifier.h> #include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/if_bridge.h> +#include <linux/list.h> +#include <linux/workqueue.h> +#include <linux/if_vlan.h> +#include <linux/rtnetlink.h> #include <net/ip_fib.h> #include <net/switchdev.h> /** - * netdev_switch_parent_id_get - Get ID of a switch + * 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); +} + +static LIST_HEAD(deferred); +static DEFINE_SPINLOCK(deferred_lock); + +typedef void switchdev_deferred_func_t(struct net_device *dev, + const void *data); + +struct switchdev_deferred_item { + struct list_head list; + struct net_device *dev; + switchdev_deferred_func_t *func; + unsigned long data[0]; +}; + +static struct switchdev_deferred_item *switchdev_deferred_dequeue(void) +{ + struct switchdev_deferred_item *dfitem; + + spin_lock_bh(&deferred_lock); + if (list_empty(&deferred)) { + dfitem = NULL; + goto unlock; + } + dfitem = list_first_entry(&deferred, + struct switchdev_deferred_item, list); + list_del(&dfitem->list); +unlock: + spin_unlock_bh(&deferred_lock); + return dfitem; +} + +/** + * switchdev_deferred_process - Process ops in deferred queue + * + * Called to flush the ops currently queued in deferred ops queue. + * rtnl_lock must be held. + */ +void switchdev_deferred_process(void) +{ + struct switchdev_deferred_item *dfitem; + + ASSERT_RTNL(); + + while ((dfitem = switchdev_deferred_dequeue())) { + dfitem->func(dfitem->dev, dfitem->data); + dev_put(dfitem->dev); + kfree(dfitem); + } +} +EXPORT_SYMBOL_GPL(switchdev_deferred_process); + +static void switchdev_deferred_process_work(struct work_struct *work) +{ + rtnl_lock(); + switchdev_deferred_process(); + rtnl_unlock(); +} + +static DECLARE_WORK(deferred_process_work, switchdev_deferred_process_work); + +static int switchdev_deferred_enqueue(struct net_device *dev, + const void *data, size_t data_len, + switchdev_deferred_func_t *func) +{ + struct switchdev_deferred_item *dfitem; + + dfitem = kmalloc(sizeof(*dfitem) + data_len, GFP_ATOMIC); + if (!dfitem) + return -ENOMEM; + dfitem->dev = dev; + dfitem->func = func; + memcpy(dfitem->data, data, data_len); + dev_hold(dev); + spin_lock_bh(&deferred_lock); + list_add_tail(&dfitem->list, &deferred); + spin_unlock_bh(&deferred_lock); + schedule_work(&deferred_process_work); + return 0; +} + +/** + * 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_ID_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_ID_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, + const 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) { + err = ops->switchdev_port_attr_set(dev, attr, trans); + goto done; + } + + if (attr->flags & SWITCHDEV_F_NO_RECURSE) + goto done; + + /* 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; + } + +done: + if (err == -EOPNOTSUPP && attr->flags & SWITCHDEV_F_SKIP_EOPNOTSUPP) + err = 0; + + return err; +} + +static int switchdev_port_attr_set_now(struct net_device *dev, + const struct switchdev_attr *attr) +{ + struct switchdev_trans trans; + int err; + + 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; +} + +static void switchdev_port_attr_set_deferred(struct net_device *dev, + const void *data) +{ + const struct switchdev_attr *attr = data; + int err; + + err = switchdev_port_attr_set_now(dev, attr); + if (err && err != -EOPNOTSUPP) + netdev_err(dev, "failed (err=%d) to set attribute (id=%d)\n", + err, attr->id); +} + +static int switchdev_port_attr_set_defer(struct net_device *dev, + const struct switchdev_attr *attr) +{ + return switchdev_deferred_enqueue(dev, attr, sizeof(*attr), + switchdev_port_attr_set_deferred); +} + +/** + * switchdev_port_attr_set - Set port attribute + * * @dev: port device - * @psid: switch ID + * @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. * - * Get ID of a switch this port is part of. + * rtnl_lock must be held and must not be in atomic section, + * in case SWITCHDEV_F_DEFER flag is not set. */ -int netdev_switch_parent_id_get(struct net_device *dev, - struct netdev_phys_item_id *psid) +int switchdev_port_attr_set(struct net_device *dev, + const struct switchdev_attr *attr) +{ + if (attr->flags & SWITCHDEV_F_DEFER) + return switchdev_port_attr_set_defer(dev, attr); + ASSERT_RTNL(); + return switchdev_port_attr_set_now(dev, attr); +} +EXPORT_SYMBOL_GPL(switchdev_port_attr_set); + +static size_t switchdev_obj_size(const struct switchdev_obj *obj) +{ + switch (obj->id) { + case SWITCHDEV_OBJ_ID_PORT_VLAN: + return sizeof(struct switchdev_obj_port_vlan); + case SWITCHDEV_OBJ_ID_IPV4_FIB: + return sizeof(struct switchdev_obj_ipv4_fib); + case SWITCHDEV_OBJ_ID_PORT_FDB: + return sizeof(struct switchdev_obj_port_fdb); + default: + BUG(); + } + return 0; +} + +static int __switchdev_port_obj_add(struct net_device *dev, + const 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; +} + +static int switchdev_port_obj_add_now(struct net_device *dev, + const struct switchdev_obj *obj) { - const struct swdev_ops *ops = dev->swdev_ops; + struct switchdev_trans trans; + int err; + + ASSERT_RTNL(); + + switchdev_trans_init(&trans); - if (!ops || !ops->swdev_parent_id_get) - return -EOPNOTSUPP; - return ops->swdev_parent_id_get(dev, psid); + /* 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; +} + +static void switchdev_port_obj_add_deferred(struct net_device *dev, + const void *data) +{ + const struct switchdev_obj *obj = data; + int err; + + err = switchdev_port_obj_add_now(dev, obj); + if (err && err != -EOPNOTSUPP) + netdev_err(dev, "failed (err=%d) to add object (id=%d)\n", + err, obj->id); +} + +static int switchdev_port_obj_add_defer(struct net_device *dev, + const struct switchdev_obj *obj) +{ + return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj), + switchdev_port_obj_add_deferred); } -EXPORT_SYMBOL_GPL(netdev_switch_parent_id_get); /** - * netdev_switch_port_stp_update - Notify switch device port of STP - * state change + * switchdev_port_obj_add - Add port object + * * @dev: port device - * @state: port STP state + * @id: object ID + * @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. * - * Notify switch device port of bridge port STP state change. + * rtnl_lock must be held and must not be in atomic section, + * in case SWITCHDEV_F_DEFER flag is not set. */ -int netdev_switch_port_stp_update(struct net_device *dev, u8 state) +int switchdev_port_obj_add(struct net_device *dev, + const struct switchdev_obj *obj) { - const struct swdev_ops *ops = dev->swdev_ops; + if (obj->flags & SWITCHDEV_F_DEFER) + return switchdev_port_obj_add_defer(dev, obj); + ASSERT_RTNL(); + return switchdev_port_obj_add_now(dev, obj); +} +EXPORT_SYMBOL_GPL(switchdev_port_obj_add); + +static int switchdev_port_obj_del_now(struct net_device *dev, + const 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->swdev_port_stp_update) - return ops->swdev_port_stp_update(dev, state); + 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 = netdev_switch_port_stp_update(lower_dev, state); - if (err && err != -EOPNOTSUPP) - return err; + err = switchdev_port_obj_del_now(lower_dev, obj); + if (err) + break; + } + + return err; +} + +static void switchdev_port_obj_del_deferred(struct net_device *dev, + const void *data) +{ + const struct switchdev_obj *obj = data; + int err; + + err = switchdev_port_obj_del_now(dev, obj); + if (err && err != -EOPNOTSUPP) + netdev_err(dev, "failed (err=%d) to del object (id=%d)\n", + err, obj->id); +} + +static int switchdev_port_obj_del_defer(struct net_device *dev, + const struct switchdev_obj *obj) +{ + return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj), + switchdev_port_obj_del_deferred); +} + +/** + * switchdev_port_obj_del - Delete port object + * + * @dev: port device + * @id: object ID + * @obj: object to delete + * + * rtnl_lock must be held and must not be in atomic section, + * in case SWITCHDEV_F_DEFER flag is not set. + */ +int switchdev_port_obj_del(struct net_device *dev, + const struct switchdev_obj *obj) +{ + if (obj->flags & SWITCHDEV_F_DEFER) + return switchdev_port_obj_del_defer(dev, obj); + ASSERT_RTNL(); + return switchdev_port_obj_del_now(dev, obj); +} +EXPORT_SYMBOL_GPL(switchdev_port_obj_del); + +/** + * switchdev_port_obj_dump - Dump port objects + * + * @dev: port device + * @id: object ID + * @obj: object to dump + * @cb: function to call with a filled object + * + * rtnl_lock must be held. + */ +int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj, + switchdev_obj_dump_cb_t *cb) +{ + const struct switchdev_ops *ops = dev->switchdev_ops; + struct net_device *lower_dev; + struct list_head *iter; + int err = -EOPNOTSUPP; + + ASSERT_RTNL(); + + if (ops && ops->switchdev_port_obj_dump) + return ops->switchdev_port_obj_dump(dev, obj, cb); + + /* 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, cb); + break; } return err; } -EXPORT_SYMBOL_GPL(netdev_switch_port_stp_update); +EXPORT_SYMBOL_GPL(switchdev_port_obj_dump); -static DEFINE_MUTEX(netdev_switch_mutex); -static RAW_NOTIFIER_HEAD(netdev_switch_notif_chain); +static RAW_NOTIFIER_HEAD(switchdev_notif_chain); /** - * register_netdev_switch_notifier - Register notifier + * 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_netdev_switch_notifier(struct notifier_block *nb) +int register_switchdev_notifier(struct notifier_block *nb) { int err; - mutex_lock(&netdev_switch_mutex); - err = raw_notifier_chain_register(&netdev_switch_notif_chain, nb); - mutex_unlock(&netdev_switch_mutex); + rtnl_lock(); + err = raw_notifier_chain_register(&switchdev_notif_chain, nb); + rtnl_unlock(); return err; } -EXPORT_SYMBOL_GPL(register_netdev_switch_notifier); +EXPORT_SYMBOL_GPL(register_switchdev_notifier); /** - * unregister_netdev_switch_notifier - Unregister 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_netdev_switch_notifier(struct notifier_block *nb) +int unregister_switchdev_notifier(struct notifier_block *nb) { int err; - mutex_lock(&netdev_switch_mutex); - err = raw_notifier_chain_unregister(&netdev_switch_notif_chain, nb); - mutex_unlock(&netdev_switch_mutex); + rtnl_lock(); + err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); + rtnl_unlock(); return err; } -EXPORT_SYMBOL_GPL(unregister_netdev_switch_notifier); +EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); /** - * call_netdev_switch_notifiers - Call notifiers + * call_switchdev_notifiers - Call notifiers * @val: value passed unmodified to notifier function * @dev: port device * @info: notifier information data @@ -113,147 +614,498 @@ EXPORT_SYMBOL_GPL(unregister_netdev_switch_notifier); * 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(). + * rtnl_lock must be held. */ -int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev, - struct netdev_switch_notifier_info *info) +int call_switchdev_notifiers(unsigned long val, struct net_device *dev, + struct switchdev_notifier_info *info) { int err; + ASSERT_RTNL(); + info->dev = dev; - mutex_lock(&netdev_switch_mutex); - err = raw_notifier_call_chain(&netdev_switch_notif_chain, val, info); - mutex_unlock(&netdev_switch_mutex); + err = raw_notifier_call_chain(&switchdev_notif_chain, val, info); + return err; +} +EXPORT_SYMBOL_GPL(call_switchdev_notifiers); + +struct switchdev_vlan_dump { + struct switchdev_obj_port_vlan vlan; + 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 { + vinfo.vid = dump->begin; + vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; + if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, + sizeof(vinfo), &vinfo)) + return -EMSGSIZE; + vinfo.vid = dump->end; + vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN; + vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END; + if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, + sizeof(vinfo), &vinfo)) + return -EMSGSIZE; + } + + return 0; +} + +static int switchdev_port_vlan_dump_cb(struct switchdev_obj *obj) +{ + struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); + struct switchdev_vlan_dump *dump = + container_of(vlan, struct switchdev_vlan_dump, vlan); + int err = 0; + + if (vlan->vid_begin > vlan->vid_end) + return -EINVAL; + + if (dump->filter_mask & RTEXT_FILTER_BRVLAN) { + dump->flags = vlan->flags; + for (dump->begin = dump->end = vlan->vid_begin; + dump->begin <= vlan->vid_end; + dump->begin++, dump->end++) { + err = switchdev_port_vlan_dump_put(dump); + if (err) + return err; + } + } else if (dump->filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) { + if (dump->begin > vlan->vid_begin && + dump->begin >= vlan->vid_end) { + if ((dump->begin - 1) == vlan->vid_end && + dump->flags == vlan->flags) { + /* prepend */ + dump->begin = vlan->vid_begin; + } else { + err = switchdev_port_vlan_dump_put(dump); + dump->flags = vlan->flags; + dump->begin = vlan->vid_begin; + dump->end = vlan->vid_end; + } + } else if (dump->end <= vlan->vid_begin && + dump->end < vlan->vid_end) { + if ((dump->end + 1) == vlan->vid_begin && + dump->flags == vlan->flags) { + /* append */ + dump->end = vlan->vid_end; + } else { + err = switchdev_port_vlan_dump_put(dump); + dump->flags = vlan->flags; + dump->begin = vlan->vid_begin; + dump->end = vlan->vid_end; + } + } else { + err = -EINVAL; + } + } + return err; } -EXPORT_SYMBOL_GPL(call_netdev_switch_notifiers); + +static int switchdev_port_vlan_fill(struct sk_buff *skb, struct net_device *dev, + u32 filter_mask) +{ + struct switchdev_vlan_dump dump = { + .vlan.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, + .skb = skb, + .filter_mask = filter_mask, + }; + int err = 0; + + if ((filter_mask & RTEXT_FILTER_BRVLAN) || + (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { + err = switchdev_port_obj_dump(dev, &dump.vlan.obj, + switchdev_port_vlan_dump_cb); + if (err) + goto err_out; + if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) + /* last one */ + err = switchdev_port_vlan_dump_put(&dump); + } + +err_out: + return err == -EOPNOTSUPP ? 0 : err; +} /** - * netdev_switch_port_bridge_setlink - Notify switch device port of bridge - * port attributes + * switchdev_port_bridge_getlink - Get bridge port attributes * * @dev: port device - * @nlh: netlink msg with bridge port attributes - * @flags: bridge setlink flags * - * Notify switch device port of bridge port attributes + * Called for SELF on rtnl_bridge_getlink to get bridge port + * attributes. */ -int netdev_switch_port_bridge_setlink(struct net_device *dev, - struct nlmsghdr *nlh, u16 flags) +int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, + struct net_device *dev, u32 filter_mask, + int nlflags) { - const struct net_device_ops *ops = dev->netdev_ops; + struct switchdev_attr attr = { + .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS, + }; + u16 mode = BRIDGE_MODE_UNDEF; + u32 mask = BR_LEARNING | BR_LEARNING_SYNC | BR_FLOOD; + int err; - if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD)) - return 0; + err = switchdev_port_attr_get(dev, &attr); + if (err && err != -EOPNOTSUPP) + return err; + + return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, + attr.u.brport_flags, mask, nlflags, + filter_mask, switchdev_port_vlan_fill); +} +EXPORT_SYMBOL_GPL(switchdev_port_bridge_getlink); + +static int switchdev_port_br_setflag(struct net_device *dev, + struct nlattr *nlattr, + unsigned long brport_flag) +{ + struct switchdev_attr attr = { + .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS, + }; + u8 flag = nla_get_u8(nlattr); + int err; - if (!ops->ndo_bridge_setlink) - return -EOPNOTSUPP; + err = switchdev_port_attr_get(dev, &attr); + if (err) + return err; - return ops->ndo_bridge_setlink(dev, nlh, flags); + if (flag) + attr.u.brport_flags |= brport_flag; + else + attr.u.brport_flags &= ~brport_flag; + + return switchdev_port_attr_set(dev, &attr); +} + +static const struct nla_policy +switchdev_port_bridge_policy[IFLA_BRPORT_MAX + 1] = { + [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, + [IFLA_BRPORT_COST] = { .type = NLA_U32 }, + [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, + [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, + [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, + [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, + [IFLA_BRPORT_FAST_LEAVE] = { .type = NLA_U8 }, + [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, + [IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 }, + [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, +}; + +static int switchdev_port_br_setlink_protinfo(struct net_device *dev, + struct nlattr *protinfo) +{ + struct nlattr *attr; + int rem; + int err; + + err = nla_validate_nested(protinfo, IFLA_BRPORT_MAX, + switchdev_port_bridge_policy); + if (err) + return err; + + nla_for_each_nested(attr, protinfo, rem) { + switch (nla_type(attr)) { + case IFLA_BRPORT_LEARNING: + err = switchdev_port_br_setflag(dev, attr, + BR_LEARNING); + break; + case IFLA_BRPORT_LEARNING_SYNC: + err = switchdev_port_br_setflag(dev, attr, + BR_LEARNING_SYNC); + break; + case IFLA_BRPORT_UNICAST_FLOOD: + err = switchdev_port_br_setflag(dev, attr, BR_FLOOD); + break; + default: + err = -EOPNOTSUPP; + break; + } + if (err) + return err; + } + + return 0; +} + +static int switchdev_port_br_afspec(struct net_device *dev, + struct nlattr *afspec, + int (*f)(struct net_device *dev, + const struct switchdev_obj *obj)) +{ + struct nlattr *attr; + struct bridge_vlan_info *vinfo; + struct switchdev_obj_port_vlan vlan = { + .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, + }; + int rem; + int err; + + nla_for_each_nested(attr, afspec, rem) { + if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) + continue; + if (nla_len(attr) != sizeof(struct bridge_vlan_info)) + return -EINVAL; + vinfo = nla_data(attr); + if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK) + return -EINVAL; + vlan.flags = vinfo->flags; + if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { + if (vlan.vid_begin) + return -EINVAL; + vlan.vid_begin = vinfo->vid; + /* don't allow range of pvids */ + if (vlan.flags & BRIDGE_VLAN_INFO_PVID) + return -EINVAL; + } else if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) { + if (!vlan.vid_begin) + return -EINVAL; + vlan.vid_end = vinfo->vid; + if (vlan.vid_end <= vlan.vid_begin) + return -EINVAL; + err = f(dev, &vlan.obj); + if (err) + return err; + vlan.vid_begin = 0; + } else { + if (vlan.vid_begin) + return -EINVAL; + vlan.vid_begin = vinfo->vid; + vlan.vid_end = vinfo->vid; + err = f(dev, &vlan.obj); + if (err) + return err; + vlan.vid_begin = 0; + } + } + + return 0; } -EXPORT_SYMBOL_GPL(netdev_switch_port_bridge_setlink); /** - * netdev_switch_port_bridge_dellink - Notify switch device port of bridge - * port attribute delete + * switchdev_port_bridge_setlink - Set bridge port attributes * * @dev: port device - * @nlh: netlink msg with bridge port attributes - * @flags: bridge setlink flags + * @nlh: netlink header + * @flags: netlink flags * - * Notify switch device port of bridge port attribute delete + * Called for SELF on rtnl_bridge_setlink to set bridge port + * attributes. */ -int netdev_switch_port_bridge_dellink(struct net_device *dev, - struct nlmsghdr *nlh, u16 flags) +int switchdev_port_bridge_setlink(struct net_device *dev, + struct nlmsghdr *nlh, u16 flags) { - const struct net_device_ops *ops = dev->netdev_ops; + struct nlattr *protinfo; + struct nlattr *afspec; + int err = 0; - if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD)) - return 0; + protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), + IFLA_PROTINFO); + if (protinfo) { + err = switchdev_port_br_setlink_protinfo(dev, protinfo); + if (err) + return err; + } - if (!ops->ndo_bridge_dellink) - return -EOPNOTSUPP; + afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), + IFLA_AF_SPEC); + if (afspec) + err = switchdev_port_br_afspec(dev, afspec, + switchdev_port_obj_add); - return ops->ndo_bridge_dellink(dev, nlh, flags); + return err; } -EXPORT_SYMBOL_GPL(netdev_switch_port_bridge_dellink); +EXPORT_SYMBOL_GPL(switchdev_port_bridge_setlink); /** - * ndo_dflt_netdev_switch_port_bridge_setlink - default ndo bridge setlink - * op for master devices + * switchdev_port_bridge_dellink - Set bridge port attributes * * @dev: port device - * @nlh: netlink msg with bridge port attributes - * @flags: bridge setlink flags + * @nlh: netlink header + * @flags: netlink flags * - * Notify master device slaves of bridge port attributes + * Called for SELF on rtnl_bridge_dellink to set bridge port + * attributes. */ -int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *dev, - struct nlmsghdr *nlh, u16 flags) +int switchdev_port_bridge_dellink(struct net_device *dev, + struct nlmsghdr *nlh, u16 flags) { - struct net_device *lower_dev; - struct list_head *iter; - int ret = 0, err = 0; + struct nlattr *afspec; - if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD)) - return ret; + afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), + IFLA_AF_SPEC); + if (afspec) + return switchdev_port_br_afspec(dev, afspec, + switchdev_port_obj_del); - netdev_for_each_lower_dev(dev, lower_dev, iter) { - err = netdev_switch_port_bridge_setlink(lower_dev, nlh, flags); - if (err && err != -EOPNOTSUPP) - ret = err; - } + return 0; +} +EXPORT_SYMBOL_GPL(switchdev_port_bridge_dellink); + +/** + * switchdev_port_fdb_add - Add FDB (MAC/VLAN) entry to port + * + * @ndmsg: netlink hdr + * @nlattr: netlink attributes + * @dev: port device + * @addr: MAC address to add + * @vid: VLAN to add + * + * Add FDB entry to switch device. + */ +int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], + struct net_device *dev, const unsigned char *addr, + u16 vid, u16 nlm_flags) +{ + struct switchdev_obj_port_fdb fdb = { + .obj.id = SWITCHDEV_OBJ_ID_PORT_FDB, + .vid = vid, + }; - return ret; + ether_addr_copy(fdb.addr, addr); + return switchdev_port_obj_add(dev, &fdb.obj); } -EXPORT_SYMBOL_GPL(ndo_dflt_netdev_switch_port_bridge_setlink); +EXPORT_SYMBOL_GPL(switchdev_port_fdb_add); /** - * ndo_dflt_netdev_switch_port_bridge_dellink - default ndo bridge dellink - * op for master devices + * switchdev_port_fdb_del - Delete FDB (MAC/VLAN) entry from port * + * @ndmsg: netlink hdr + * @nlattr: netlink attributes * @dev: port device - * @nlh: netlink msg with bridge port attributes - * @flags: bridge dellink flags + * @addr: MAC address to delete + * @vid: VLAN to delete * - * Notify master device slaves of bridge port attribute deletes + * Delete FDB entry from switch device. */ -int ndo_dflt_netdev_switch_port_bridge_dellink(struct net_device *dev, - struct nlmsghdr *nlh, u16 flags) +int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], + struct net_device *dev, const unsigned char *addr, + u16 vid) { - struct net_device *lower_dev; - struct list_head *iter; - int ret = 0, err = 0; + struct switchdev_obj_port_fdb fdb = { + .obj.id = SWITCHDEV_OBJ_ID_PORT_FDB, + .vid = vid, + }; - if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD)) - return ret; + ether_addr_copy(fdb.addr, addr); + return switchdev_port_obj_del(dev, &fdb.obj); +} +EXPORT_SYMBOL_GPL(switchdev_port_fdb_del); - netdev_for_each_lower_dev(dev, lower_dev, iter) { - err = netdev_switch_port_bridge_dellink(lower_dev, nlh, flags); - if (err && err != -EOPNOTSUPP) - ret = err; - } +struct switchdev_fdb_dump { + struct switchdev_obj_port_fdb fdb; + struct net_device *dev; + struct sk_buff *skb; + struct netlink_callback *cb; + int idx; +}; - return ret; +static int switchdev_port_fdb_dump_cb(struct switchdev_obj *obj) +{ + struct switchdev_obj_port_fdb *fdb = SWITCHDEV_OBJ_PORT_FDB(obj); + struct switchdev_fdb_dump *dump = + container_of(fdb, struct switchdev_fdb_dump, fdb); + u32 portid = NETLINK_CB(dump->cb->skb).portid; + u32 seq = dump->cb->nlh->nlmsg_seq; + struct nlmsghdr *nlh; + struct ndmsg *ndm; + + if (dump->idx < dump->cb->args[0]) + goto skip; + + nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, + sizeof(*ndm), NLM_F_MULTI); + if (!nlh) + return -EMSGSIZE; + + ndm = nlmsg_data(nlh); + ndm->ndm_family = AF_BRIDGE; + ndm->ndm_pad1 = 0; + ndm->ndm_pad2 = 0; + ndm->ndm_flags = NTF_SELF; + ndm->ndm_type = 0; + ndm->ndm_ifindex = dump->dev->ifindex; + ndm->ndm_state = fdb->ndm_state; + + if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, fdb->addr)) + goto nla_put_failure; + + if (fdb->vid && nla_put_u16(dump->skb, NDA_VLAN, fdb->vid)) + goto nla_put_failure; + + nlmsg_end(dump->skb, nlh); + +skip: + dump->idx++; + return 0; + +nla_put_failure: + nlmsg_cancel(dump->skb, nlh); + return -EMSGSIZE; } -EXPORT_SYMBOL_GPL(ndo_dflt_netdev_switch_port_bridge_dellink); -static struct net_device *netdev_switch_get_lowest_dev(struct net_device *dev) +/** + * switchdev_port_fdb_dump - Dump port FDB (MAC/VLAN) entries + * + * @skb: netlink skb + * @cb: netlink callback + * @dev: port device + * @filter_dev: filter device + * @idx: + * + * Delete FDB entry from switch device. + */ +int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, + struct net_device *dev, + struct net_device *filter_dev, int idx) +{ + struct switchdev_fdb_dump dump = { + .fdb.obj.id = SWITCHDEV_OBJ_ID_PORT_FDB, + .dev = dev, + .skb = skb, + .cb = cb, + .idx = idx, + }; + + switchdev_port_obj_dump(dev, &dump.fdb.obj, switchdev_port_fdb_dump_cb); + return dump.idx; +} +EXPORT_SYMBOL_GPL(switchdev_port_fdb_dump); + +static struct net_device *switchdev_get_lowest_dev(struct net_device *dev) { - const struct swdev_ops *ops = dev->swdev_ops; + const struct switchdev_ops *ops = dev->switchdev_ops; struct net_device *lower_dev; struct net_device *port_dev; struct list_head *iter; /* Recusively search down until we find a sw port dev. - * (A sw port dev supports swdev_parent_id_get). + * (A sw port dev supports switchdev_port_attr_get). */ - if (dev->features & NETIF_F_HW_SWITCH_OFFLOAD && - ops && ops->swdev_parent_id_get) + if (ops && ops->switchdev_port_attr_get) return dev; netdev_for_each_lower_dev(dev, lower_dev, iter) { - port_dev = netdev_switch_get_lowest_dev(lower_dev); + port_dev = switchdev_get_lowest_dev(lower_dev); if (port_dev) return port_dev; } @@ -261,13 +1113,17 @@ static struct net_device *netdev_switch_get_lowest_dev(struct net_device *dev) return NULL; } -static struct net_device *netdev_switch_get_dev_by_nhs(struct fib_info *fi) +static struct net_device *switchdev_get_dev_by_nhs(struct fib_info *fi) { - struct netdev_phys_item_id psid; - struct netdev_phys_item_id prev_psid; + struct switchdev_attr attr = { + .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, + }; + struct switchdev_attr prev_attr; struct net_device *dev = NULL; int nhsel; + ASSERT_RTNL(); + /* For this route, all nexthop devs must be on the same switch. */ for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) { @@ -276,28 +1132,25 @@ static struct net_device *netdev_switch_get_dev_by_nhs(struct fib_info *fi) if (!nh->nh_dev) return NULL; - dev = netdev_switch_get_lowest_dev(nh->nh_dev); + dev = switchdev_get_lowest_dev(nh->nh_dev); if (!dev) return NULL; - if (netdev_switch_parent_id_get(dev, &psid)) + if (switchdev_port_attr_get(dev, &attr)) return NULL; - if (nhsel > 0) { - if (prev_psid.id_len != psid.id_len) + if (nhsel > 0 && + !netdev_phys_item_id_same(&prev_attr.u.ppid, &attr.u.ppid)) return NULL; - if (memcmp(prev_psid.id, psid.id, psid.id_len)) - return NULL; - } - prev_psid = psid; + prev_attr = attr; } return dev; } /** - * netdev_switch_fib_ipv4_add - Add IPv4 route entry to switch + * switchdev_fib_ipv4_add - Add/modify switch IPv4 route entry * * @dst: route's IPv4 destination address * @dst_len: destination address length (prefix length) @@ -307,15 +1160,25 @@ static struct net_device *netdev_switch_get_dev_by_nhs(struct fib_info *fi) * @nlflags: netlink flags passed in (NLM_F_*) * @tb_id: route table ID * - * Add IPv4 route entry to switch device. + * Add/modify switch IPv4 route entry. */ -int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi, - u8 tos, u8 type, u32 nlflags, u32 tb_id) +int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi, + u8 tos, u8 type, u32 nlflags, u32 tb_id) { + struct switchdev_obj_ipv4_fib ipv4_fib = { + .obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB, + .dst = dst, + .dst_len = dst_len, + .tos = tos, + .type = type, + .nlflags = nlflags, + .tb_id = tb_id, + }; struct net_device *dev; - const struct swdev_ops *ops; int err = 0; + memcpy(&ipv4_fib.fi, fi, sizeof(ipv4_fib.fi)); + /* Don't offload route if using custom ip rules or if * IPv4 FIB offloading has been disabled completely. */ @@ -328,25 +1191,20 @@ int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi, if (fi->fib_net->ipv4.fib_offload_disabled) return 0; - dev = netdev_switch_get_dev_by_nhs(fi); + dev = switchdev_get_dev_by_nhs(fi); if (!dev) return 0; - ops = dev->swdev_ops; - - if (ops->swdev_fib_ipv4_add) { - err = ops->swdev_fib_ipv4_add(dev, htonl(dst), dst_len, - fi, tos, type, nlflags, - tb_id); - if (!err) - fi->fib_flags |= RTNH_F_OFFLOAD; - } - return err; + err = switchdev_port_obj_add(dev, &ipv4_fib.obj); + if (!err) + fi->fib_flags |= RTNH_F_OFFLOAD; + + return err == -EOPNOTSUPP ? 0 : err; } -EXPORT_SYMBOL_GPL(netdev_switch_fib_ipv4_add); +EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_add); /** - * netdev_switch_fib_ipv4_del - Delete IPv4 route entry from switch + * switchdev_fib_ipv4_del - Delete IPv4 route entry from switch * * @dst: route's IPv4 destination address * @dst_len: destination address length (prefix length) @@ -357,38 +1215,44 @@ EXPORT_SYMBOL_GPL(netdev_switch_fib_ipv4_add); * * Delete IPv4 route entry from switch device. */ -int netdev_switch_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi, - u8 tos, u8 type, u32 tb_id) +int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi, + u8 tos, u8 type, u32 tb_id) { + struct switchdev_obj_ipv4_fib ipv4_fib = { + .obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB, + .dst = dst, + .dst_len = dst_len, + .tos = tos, + .type = type, + .nlflags = 0, + .tb_id = tb_id, + }; struct net_device *dev; - const struct swdev_ops *ops; int err = 0; + memcpy(&ipv4_fib.fi, fi, sizeof(ipv4_fib.fi)); + if (!(fi->fib_flags & RTNH_F_OFFLOAD)) return 0; - dev = netdev_switch_get_dev_by_nhs(fi); + dev = switchdev_get_dev_by_nhs(fi); if (!dev) return 0; - ops = dev->swdev_ops; - if (ops->swdev_fib_ipv4_del) { - err = ops->swdev_fib_ipv4_del(dev, htonl(dst), dst_len, - fi, tos, type, tb_id); - if (!err) - fi->fib_flags &= ~RTNH_F_OFFLOAD; - } + err = switchdev_port_obj_del(dev, &ipv4_fib.obj); + if (!err) + fi->fib_flags &= ~RTNH_F_OFFLOAD; - return err; + return err == -EOPNOTSUPP ? 0 : err; } -EXPORT_SYMBOL_GPL(netdev_switch_fib_ipv4_del); +EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_del); /** - * netdev_switch_fib_ipv4_abort - Abort an IPv4 FIB operation + * switchdev_fib_ipv4_abort - Abort an IPv4 FIB operation * * @fi: route FIB info structure */ -void netdev_switch_fib_ipv4_abort(struct fib_info *fi) +void switchdev_fib_ipv4_abort(struct fib_info *fi) { /* There was a problem installing this route to the offload * device. For now, until we come up with more refined @@ -401,4 +1265,108 @@ void netdev_switch_fib_ipv4_abort(struct fib_info *fi) fib_flush_external(fi->fib_net); fi->fib_net->ipv4.fib_offload_disabled = true; } -EXPORT_SYMBOL_GPL(netdev_switch_fib_ipv4_abort); +EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort); + +static bool switchdev_port_same_parent_id(struct net_device *a, + struct net_device *b) +{ + struct switchdev_attr a_attr = { + .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, + .flags = SWITCHDEV_F_NO_RECURSE, + }; + struct switchdev_attr b_attr = { + .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, + .flags = SWITCHDEV_F_NO_RECURSE, + }; + + if (switchdev_port_attr_get(a, &a_attr) || + switchdev_port_attr_get(b, &b_attr)) + return false; + + return netdev_phys_item_id_same(&a_attr.u.ppid, &b_attr.u.ppid); +} + +static u32 switchdev_port_fwd_mark_get(struct net_device *dev, + struct net_device *group_dev) +{ + struct net_device *lower_dev; + struct list_head *iter; + + netdev_for_each_lower_dev(group_dev, lower_dev, iter) { + if (lower_dev == dev) + continue; + if (switchdev_port_same_parent_id(dev, lower_dev)) + return lower_dev->offload_fwd_mark; + return switchdev_port_fwd_mark_get(dev, lower_dev); + } + + return dev->ifindex; +} + +static void switchdev_port_fwd_mark_reset(struct net_device *group_dev, + u32 old_mark, u32 *reset_mark) +{ + struct net_device *lower_dev; + struct list_head *iter; + + netdev_for_each_lower_dev(group_dev, lower_dev, iter) { + if (lower_dev->offload_fwd_mark == old_mark) { + if (!*reset_mark) + *reset_mark = lower_dev->ifindex; + lower_dev->offload_fwd_mark = *reset_mark; + } + switchdev_port_fwd_mark_reset(lower_dev, old_mark, reset_mark); + } +} + +/** + * switchdev_port_fwd_mark_set - Set port offload forwarding mark + * + * @dev: port device + * @group_dev: containing device + * @joining: true if dev is joining group; false if leaving group + * + * An ungrouped port's offload mark is just its ifindex. A grouped + * port's (member of a bridge, for example) offload mark is the ifindex + * of one of the ports in the group with the same parent (switch) ID. + * Ports on the same device in the same group will have the same mark. + * + * Example: + * + * br0 ifindex=9 + * sw1p1 ifindex=2 mark=2 + * sw1p2 ifindex=3 mark=2 + * sw2p1 ifindex=4 mark=5 + * sw2p2 ifindex=5 mark=5 + * + * If sw2p2 leaves the bridge, we'll have: + * + * br0 ifindex=9 + * sw1p1 ifindex=2 mark=2 + * sw1p2 ifindex=3 mark=2 + * sw2p1 ifindex=4 mark=4 + * sw2p2 ifindex=5 mark=5 + */ +void switchdev_port_fwd_mark_set(struct net_device *dev, + struct net_device *group_dev, + bool joining) +{ + u32 mark = dev->ifindex; + u32 reset_mark = 0; + + if (group_dev) { + ASSERT_RTNL(); + if (joining) + mark = switchdev_port_fwd_mark_get(dev, group_dev); + else if (dev->offload_fwd_mark == mark) + /* Ohoh, this port was the mark reference port, + * but it's leaving the group, so reset the + * mark for the remaining ports in the group. + */ + switchdev_port_fwd_mark_reset(group_dev, mark, + &reset_mark); + } + + dev->offload_fwd_mark = mark; +} +EXPORT_SYMBOL_GPL(switchdev_port_fwd_mark_set); |