| /* |
| * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> |
| * |
| * 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. |
| * |
| * The code this is based on carried the following copyright notice: |
| * --- |
| * (C) Copyright 2001-2006 |
| * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com |
| * Re-worked by Ben Greear <greearb@candelatech.com> |
| * --- |
| */ |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/rculist.h> |
| #include <linux/notifier.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/ethtool.h> |
| #include <linux/if_arp.h> |
| #include <linux/if_link.h> |
| #include <linux/if_macvlan.h> |
| #include <net/rtnetlink.h> |
| #include <net/xfrm.h> |
| |
| #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) |
| |
| struct macvlan_port { |
| struct net_device *dev; |
| struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; |
| struct list_head vlans; |
| struct rcu_head rcu; |
| }; |
| |
| static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
| const unsigned char *addr) |
| { |
| struct macvlan_dev *vlan; |
| struct hlist_node *n; |
| |
| hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { |
| if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr)) |
| return vlan; |
| } |
| return NULL; |
| } |
| |
| static void macvlan_hash_add(struct macvlan_dev *vlan) |
| { |
| struct macvlan_port *port = vlan->port; |
| const unsigned char *addr = vlan->dev->dev_addr; |
| |
| hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); |
| } |
| |
| static void macvlan_hash_del(struct macvlan_dev *vlan) |
| { |
| hlist_del_rcu(&vlan->hlist); |
| synchronize_rcu(); |
| } |
| |
| static void macvlan_hash_change_addr(struct macvlan_dev *vlan, |
| const unsigned char *addr) |
| { |
| macvlan_hash_del(vlan); |
| /* Now that we are unhashed it is safe to change the device |
| * address without confusing packet delivery. |
| */ |
| memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); |
| macvlan_hash_add(vlan); |
| } |
| |
| static int macvlan_addr_busy(const struct macvlan_port *port, |
| const unsigned char *addr) |
| { |
| /* Test to see if the specified multicast address is |
| * currently in use by the underlying device or |
| * another macvlan. |
| */ |
| if (!compare_ether_addr_64bits(port->dev->dev_addr, addr)) |
| return 1; |
| |
| if (macvlan_hash_lookup(port, addr)) |
| return 1; |
| |
| return 0; |
| } |
| |
| |
| static int macvlan_broadcast_one(struct sk_buff *skb, |
| const struct macvlan_dev *vlan, |
| const struct ethhdr *eth, bool local) |
| { |
| struct net_device *dev = vlan->dev; |
| if (!skb) |
| return NET_RX_DROP; |
| |
| if (local) |
| return vlan->forward(dev, skb); |
| |
| skb->dev = dev; |
| if (!compare_ether_addr_64bits(eth->h_dest, |
| dev->broadcast)) |
| skb->pkt_type = PACKET_BROADCAST; |
| else |
| skb->pkt_type = PACKET_MULTICAST; |
| |
| return vlan->receive(skb); |
| } |
| |
| static void macvlan_broadcast(struct sk_buff *skb, |
| const struct macvlan_port *port, |
| struct net_device *src, |
| enum macvlan_mode mode) |
| { |
| const struct ethhdr *eth = eth_hdr(skb); |
| const struct macvlan_dev *vlan; |
| struct hlist_node *n; |
| struct sk_buff *nskb; |
| unsigned int i; |
| int err; |
| |
| if (skb->protocol == htons(ETH_P_PAUSE)) |
| return; |
| |
| for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
| hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { |
| if (vlan->dev == src || !(vlan->mode & mode)) |
| continue; |
| |
| nskb = skb_clone(skb, GFP_ATOMIC); |
| err = macvlan_broadcast_one(nskb, vlan, eth, |
| mode == MACVLAN_MODE_BRIDGE); |
| macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
| err == NET_RX_SUCCESS, 1); |
| } |
| } |
| } |
| |
| /* called under rcu_read_lock() from netif_receive_skb */ |
| static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb) |
| { |
| struct macvlan_port *port; |
| const struct ethhdr *eth = eth_hdr(skb); |
| const struct macvlan_dev *vlan; |
| const struct macvlan_dev *src; |
| struct net_device *dev; |
| unsigned int len; |
| |
| port = rcu_dereference(skb->dev->macvlan_port); |
| if (is_multicast_ether_addr(eth->h_dest)) { |
| src = macvlan_hash_lookup(port, eth->h_source); |
| if (!src) |
| /* frame comes from an external address */ |
| macvlan_broadcast(skb, port, NULL, |
| MACVLAN_MODE_PRIVATE | |
| MACVLAN_MODE_VEPA | |
| MACVLAN_MODE_BRIDGE); |
| else if (src->mode == MACVLAN_MODE_VEPA) |
| /* flood to everyone except source */ |
| macvlan_broadcast(skb, port, src->dev, |
| MACVLAN_MODE_VEPA | |
| MACVLAN_MODE_BRIDGE); |
| else if (src->mode == MACVLAN_MODE_BRIDGE) |
| /* |
| * flood only to VEPA ports, bridge ports |
| * already saw the frame on the way out. |
| */ |
| macvlan_broadcast(skb, port, src->dev, |
| MACVLAN_MODE_VEPA); |
| return skb; |
| } |
| |
| vlan = macvlan_hash_lookup(port, eth->h_dest); |
| if (vlan == NULL) |
| return skb; |
| |
| dev = vlan->dev; |
| if (unlikely(!(dev->flags & IFF_UP))) { |
| kfree_skb(skb); |
| return NULL; |
| } |
| len = skb->len + ETH_HLEN; |
| skb = skb_share_check(skb, GFP_ATOMIC); |
| macvlan_count_rx(vlan, len, skb != NULL, 0); |
| if (!skb) |
| return NULL; |
| |
| skb->dev = dev; |
| skb->pkt_type = PACKET_HOST; |
| |
| vlan->receive(skb); |
| return NULL; |
| } |
| |
| static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| const struct macvlan_dev *vlan = netdev_priv(dev); |
| const struct macvlan_port *port = vlan->port; |
| const struct macvlan_dev *dest; |
| |
| if (vlan->mode == MACVLAN_MODE_BRIDGE) { |
| const struct ethhdr *eth = (void *)skb->data; |
| |
| /* send to other bridge ports directly */ |
| if (is_multicast_ether_addr(eth->h_dest)) { |
| macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); |
| goto xmit_world; |
| } |
| |
| dest = macvlan_hash_lookup(port, eth->h_dest); |
| if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { |
| unsigned int length = skb->len + ETH_HLEN; |
| int ret = dest->forward(dest->dev, skb); |
| macvlan_count_rx(dest, length, |
| ret == NET_RX_SUCCESS, 0); |
| |
| return NET_XMIT_SUCCESS; |
| } |
| } |
| |
| xmit_world: |
| skb_set_dev(skb, vlan->lowerdev); |
| return dev_queue_xmit(skb); |
| } |
| |
| netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| int i = skb_get_queue_mapping(skb); |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| unsigned int len = skb->len; |
| int ret; |
| |
| ret = macvlan_queue_xmit(skb, dev); |
| if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
| txq->tx_packets++; |
| txq->tx_bytes += len; |
| } else |
| txq->tx_dropped++; |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
| |
| static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, |
| unsigned short type, const void *daddr, |
| const void *saddr, unsigned len) |
| { |
| const struct macvlan_dev *vlan = netdev_priv(dev); |
| struct net_device *lowerdev = vlan->lowerdev; |
| |
| return dev_hard_header(skb, lowerdev, type, daddr, |
| saddr ? : dev->dev_addr, len); |
| } |
| |
| static const struct header_ops macvlan_hard_header_ops = { |
| .create = macvlan_hard_header, |
| .rebuild = eth_rebuild_header, |
| .parse = eth_header_parse, |
| .cache = eth_header_cache, |
| .cache_update = eth_header_cache_update, |
| }; |
| |
| static int macvlan_open(struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| struct net_device *lowerdev = vlan->lowerdev; |
| int err; |
| |
| err = -EBUSY; |
| if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
| goto out; |
| |
| err = dev_uc_add(lowerdev, dev->dev_addr); |
| if (err < 0) |
| goto out; |
| if (dev->flags & IFF_ALLMULTI) { |
| err = dev_set_allmulti(lowerdev, 1); |
| if (err < 0) |
| goto del_unicast; |
| } |
| macvlan_hash_add(vlan); |
| return 0; |
| |
| del_unicast: |
| dev_uc_del(lowerdev, dev->dev_addr); |
| out: |
| return err; |
| } |
| |
| static int macvlan_stop(struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| struct net_device *lowerdev = vlan->lowerdev; |
| |
| dev_mc_unsync(lowerdev, dev); |
| if (dev->flags & IFF_ALLMULTI) |
| dev_set_allmulti(lowerdev, -1); |
| |
| dev_uc_del(lowerdev, dev->dev_addr); |
| |
| macvlan_hash_del(vlan); |
| return 0; |
| } |
| |
| static int macvlan_set_mac_address(struct net_device *dev, void *p) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| struct net_device *lowerdev = vlan->lowerdev; |
| struct sockaddr *addr = p; |
| int err; |
| |
| if (!is_valid_ether_addr(addr->sa_data)) |
| return -EADDRNOTAVAIL; |
| |
| if (!(dev->flags & IFF_UP)) { |
| /* Just copy in the new address */ |
| memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
| } else { |
| /* Rehash and update the device filters */ |
| if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
| return -EBUSY; |
| |
| err = dev_uc_add(lowerdev, addr->sa_data); |
| if (err) |
| return err; |
| |
| dev_uc_del(lowerdev, dev->dev_addr); |
| |
| macvlan_hash_change_addr(vlan, addr->sa_data); |
| } |
| return 0; |
| } |
| |
| static void macvlan_change_rx_flags(struct net_device *dev, int change) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| struct net_device *lowerdev = vlan->lowerdev; |
| |
| if (change & IFF_ALLMULTI) |
| dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); |
| } |
| |
| static void macvlan_set_multicast_list(struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| |
| dev_mc_sync(vlan->lowerdev, dev); |
| } |
| |
| static int macvlan_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| |
| if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) |
| return -EINVAL; |
| dev->mtu = new_mtu; |
| return 0; |
| } |
| |
| /* |
| * macvlan network devices have devices nesting below it and are a special |
| * "super class" of normal network devices; split their locks off into a |
| * separate class since they always nest. |
| */ |
| static struct lock_class_key macvlan_netdev_xmit_lock_key; |
| static struct lock_class_key macvlan_netdev_addr_lock_key; |
| |
| #define MACVLAN_FEATURES \ |
| (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
| NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ |
| NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO) |
| |
| #define MACVLAN_STATE_MASK \ |
| ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) |
| |
| static void macvlan_set_lockdep_class_one(struct net_device *dev, |
| struct netdev_queue *txq, |
| void *_unused) |
| { |
| lockdep_set_class(&txq->_xmit_lock, |
| &macvlan_netdev_xmit_lock_key); |
| } |
| |
| static void macvlan_set_lockdep_class(struct net_device *dev) |
| { |
| lockdep_set_class(&dev->addr_list_lock, |
| &macvlan_netdev_addr_lock_key); |
| netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
| } |
| |
| static int macvlan_init(struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| const struct net_device *lowerdev = vlan->lowerdev; |
| |
| dev->state = (dev->state & ~MACVLAN_STATE_MASK) | |
| (lowerdev->state & MACVLAN_STATE_MASK); |
| dev->features = lowerdev->features & MACVLAN_FEATURES; |
| dev->gso_max_size = lowerdev->gso_max_size; |
| dev->iflink = lowerdev->ifindex; |
| dev->hard_header_len = lowerdev->hard_header_len; |
| |
| macvlan_set_lockdep_class(dev); |
| |
| vlan->rx_stats = alloc_percpu(struct macvlan_rx_stats); |
| if (!vlan->rx_stats) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static void macvlan_uninit(struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| |
| free_percpu(vlan->rx_stats); |
| } |
| |
| static struct net_device_stats *macvlan_dev_get_stats(struct net_device *dev) |
| { |
| struct net_device_stats *stats = &dev->stats; |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| |
| dev_txq_stats_fold(dev, stats); |
| |
| if (vlan->rx_stats) { |
| struct macvlan_rx_stats *p, rx = {0}; |
| int i; |
| |
| for_each_possible_cpu(i) { |
| p = per_cpu_ptr(vlan->rx_stats, i); |
| rx.rx_packets += p->rx_packets; |
| rx.rx_bytes += p->rx_bytes; |
| rx.rx_errors += p->rx_errors; |
| rx.multicast += p->multicast; |
| } |
| stats->rx_packets = rx.rx_packets; |
| stats->rx_bytes = rx.rx_bytes; |
| stats->rx_errors = rx.rx_errors; |
| stats->rx_dropped = rx.rx_errors; |
| stats->multicast = rx.multicast; |
| } |
| return stats; |
| } |
| |
| static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *drvinfo) |
| { |
| snprintf(drvinfo->driver, 32, "macvlan"); |
| snprintf(drvinfo->version, 32, "0.1"); |
| } |
| |
| static u32 macvlan_ethtool_get_rx_csum(struct net_device *dev) |
| { |
| const struct macvlan_dev *vlan = netdev_priv(dev); |
| return dev_ethtool_get_rx_csum(vlan->lowerdev); |
| } |
| |
| static int macvlan_ethtool_get_settings(struct net_device *dev, |
| struct ethtool_cmd *cmd) |
| { |
| const struct macvlan_dev *vlan = netdev_priv(dev); |
| return dev_ethtool_get_settings(vlan->lowerdev, cmd); |
| } |
| |
| static u32 macvlan_ethtool_get_flags(struct net_device *dev) |
| { |
| const struct macvlan_dev *vlan = netdev_priv(dev); |
| return dev_ethtool_get_flags(vlan->lowerdev); |
| } |
| |
| static const struct ethtool_ops macvlan_ethtool_ops = { |
| .get_link = ethtool_op_get_link, |
| .get_settings = macvlan_ethtool_get_settings, |
| .get_rx_csum = macvlan_ethtool_get_rx_csum, |
| .get_drvinfo = macvlan_ethtool_get_drvinfo, |
| .get_flags = macvlan_ethtool_get_flags, |
| }; |
| |
| static const struct net_device_ops macvlan_netdev_ops = { |
| .ndo_init = macvlan_init, |
| .ndo_uninit = macvlan_uninit, |
| .ndo_open = macvlan_open, |
| .ndo_stop = macvlan_stop, |
| .ndo_start_xmit = macvlan_start_xmit, |
| .ndo_change_mtu = macvlan_change_mtu, |
| .ndo_change_rx_flags = macvlan_change_rx_flags, |
| .ndo_set_mac_address = macvlan_set_mac_address, |
| .ndo_set_multicast_list = macvlan_set_multicast_list, |
| .ndo_get_stats = macvlan_dev_get_stats, |
| .ndo_validate_addr = eth_validate_addr, |
| }; |
| |
| static void macvlan_setup(struct net_device *dev) |
| { |
| ether_setup(dev); |
| |
| dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
| dev->netdev_ops = &macvlan_netdev_ops; |
| dev->destructor = free_netdev; |
| dev->header_ops = &macvlan_hard_header_ops, |
| dev->ethtool_ops = &macvlan_ethtool_ops; |
| dev->tx_queue_len = 0; |
| } |
| |
| static int macvlan_port_create(struct net_device *dev) |
| { |
| struct macvlan_port *port; |
| unsigned int i; |
| int err; |
| |
| if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) |
| return -EINVAL; |
| |
| port = kzalloc(sizeof(*port), GFP_KERNEL); |
| if (port == NULL) |
| return -ENOMEM; |
| |
| port->dev = dev; |
| INIT_LIST_HEAD(&port->vlans); |
| for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
| INIT_HLIST_HEAD(&port->vlan_hash[i]); |
| rcu_assign_pointer(dev->macvlan_port, port); |
| |
| err = netdev_rx_handler_register(dev, macvlan_handle_frame); |
| if (err) { |
| rcu_assign_pointer(dev->macvlan_port, NULL); |
| kfree(port); |
| } |
| |
| return err; |
| } |
| |
| static void macvlan_port_rcu_free(struct rcu_head *head) |
| { |
| struct macvlan_port *port; |
| |
| port = container_of(head, struct macvlan_port, rcu); |
| kfree(port); |
| } |
| |
| static void macvlan_port_destroy(struct net_device *dev) |
| { |
| struct macvlan_port *port = dev->macvlan_port; |
| |
| netdev_rx_handler_unregister(dev); |
| rcu_assign_pointer(dev->macvlan_port, NULL); |
| call_rcu(&port->rcu, macvlan_port_rcu_free); |
| } |
| |
| static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
| { |
| if (tb[IFLA_ADDRESS]) { |
| if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) |
| return -EINVAL; |
| if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) |
| return -EADDRNOTAVAIL; |
| } |
| |
| if (data && data[IFLA_MACVLAN_MODE]) { |
| switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { |
| case MACVLAN_MODE_PRIVATE: |
| case MACVLAN_MODE_VEPA: |
| case MACVLAN_MODE_BRIDGE: |
| break; |
| default: |
| return -EINVAL; |
| } |
| } |
| return 0; |
| } |
| |
| static int macvlan_get_tx_queues(struct net *net, |
| struct nlattr *tb[], |
| unsigned int *num_tx_queues, |
| unsigned int *real_num_tx_queues) |
| { |
| struct net_device *real_dev; |
| |
| if (!tb[IFLA_LINK]) |
| return -EINVAL; |
| |
| real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); |
| if (!real_dev) |
| return -ENODEV; |
| |
| *num_tx_queues = real_dev->num_tx_queues; |
| *real_num_tx_queues = real_dev->real_num_tx_queues; |
| return 0; |
| } |
| |
| int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
| struct nlattr *tb[], struct nlattr *data[], |
| int (*receive)(struct sk_buff *skb), |
| int (*forward)(struct net_device *dev, |
| struct sk_buff *skb)) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| struct macvlan_port *port; |
| struct net_device *lowerdev; |
| int err; |
| |
| if (!tb[IFLA_LINK]) |
| return -EINVAL; |
| |
| lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
| if (lowerdev == NULL) |
| return -ENODEV; |
| |
| /* When creating macvlans on top of other macvlans - use |
| * the real device as the lowerdev. |
| */ |
| if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
| struct macvlan_dev *lowervlan = netdev_priv(lowerdev); |
| lowerdev = lowervlan->lowerdev; |
| } |
| |
| if (!tb[IFLA_MTU]) |
| dev->mtu = lowerdev->mtu; |
| else if (dev->mtu > lowerdev->mtu) |
| return -EINVAL; |
| |
| if (!tb[IFLA_ADDRESS]) |
| random_ether_addr(dev->dev_addr); |
| |
| if (lowerdev->macvlan_port == NULL) { |
| err = macvlan_port_create(lowerdev); |
| if (err < 0) |
| return err; |
| } |
| port = lowerdev->macvlan_port; |
| |
| vlan->lowerdev = lowerdev; |
| vlan->dev = dev; |
| vlan->port = port; |
| vlan->receive = receive; |
| vlan->forward = forward; |
| |
| vlan->mode = MACVLAN_MODE_VEPA; |
| if (data && data[IFLA_MACVLAN_MODE]) |
| vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); |
| |
| err = register_netdevice(dev); |
| if (err < 0) |
| goto destroy_port; |
| |
| list_add_tail(&vlan->list, &port->vlans); |
| netif_stacked_transfer_operstate(lowerdev, dev); |
| |
| return 0; |
| |
| destroy_port: |
| if (list_empty(&port->vlans)) |
| macvlan_port_destroy(lowerdev); |
| |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
| |
| static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
| struct nlattr *tb[], struct nlattr *data[]) |
| { |
| return macvlan_common_newlink(src_net, dev, tb, data, |
| netif_rx, |
| dev_forward_skb); |
| } |
| |
| void macvlan_dellink(struct net_device *dev, struct list_head *head) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| struct macvlan_port *port = vlan->port; |
| |
| list_del(&vlan->list); |
| unregister_netdevice_queue(dev, head); |
| |
| if (list_empty(&port->vlans)) |
| macvlan_port_destroy(port->dev); |
| } |
| EXPORT_SYMBOL_GPL(macvlan_dellink); |
| |
| static int macvlan_changelink(struct net_device *dev, |
| struct nlattr *tb[], struct nlattr *data[]) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| if (data && data[IFLA_MACVLAN_MODE]) |
| vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); |
| return 0; |
| } |
| |
| static size_t macvlan_get_size(const struct net_device *dev) |
| { |
| return nla_total_size(4); |
| } |
| |
| static int macvlan_fill_info(struct sk_buff *skb, |
| const struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| |
| NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); |
| return 0; |
| |
| nla_put_failure: |
| return -EMSGSIZE; |
| } |
| |
| static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { |
| [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
| }; |
| |
| int macvlan_link_register(struct rtnl_link_ops *ops) |
| { |
| /* common fields */ |
| ops->priv_size = sizeof(struct macvlan_dev); |
| ops->get_tx_queues = macvlan_get_tx_queues; |
| ops->setup = macvlan_setup; |
| ops->validate = macvlan_validate; |
| ops->maxtype = IFLA_MACVLAN_MAX; |
| ops->policy = macvlan_policy; |
| ops->changelink = macvlan_changelink; |
| ops->get_size = macvlan_get_size; |
| ops->fill_info = macvlan_fill_info; |
| |
| return rtnl_link_register(ops); |
| }; |
| EXPORT_SYMBOL_GPL(macvlan_link_register); |
| |
| static struct rtnl_link_ops macvlan_link_ops = { |
| .kind = "macvlan", |
| .newlink = macvlan_newlink, |
| .dellink = macvlan_dellink, |
| }; |
| |
| static int macvlan_device_event(struct notifier_block *unused, |
| unsigned long event, void *ptr) |
| { |
| struct net_device *dev = ptr; |
| struct macvlan_dev *vlan, *next; |
| struct macvlan_port *port; |
| |
| port = dev->macvlan_port; |
| if (port == NULL) |
| return NOTIFY_DONE; |
| |
| switch (event) { |
| case NETDEV_CHANGE: |
| list_for_each_entry(vlan, &port->vlans, list) |
| netif_stacked_transfer_operstate(vlan->lowerdev, |
| vlan->dev); |
| break; |
| case NETDEV_FEAT_CHANGE: |
| list_for_each_entry(vlan, &port->vlans, list) { |
| vlan->dev->features = dev->features & MACVLAN_FEATURES; |
| vlan->dev->gso_max_size = dev->gso_max_size; |
| netdev_features_change(vlan->dev); |
| } |
| break; |
| case NETDEV_UNREGISTER: |
| list_for_each_entry_safe(vlan, next, &port->vlans, list) |
| vlan->dev->rtnl_link_ops->dellink(vlan->dev, NULL); |
| break; |
| case NETDEV_PRE_TYPE_CHANGE: |
| /* Forbid underlaying device to change its type. */ |
| return NOTIFY_BAD; |
| } |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block macvlan_notifier_block __read_mostly = { |
| .notifier_call = macvlan_device_event, |
| }; |
| |
| static int __init macvlan_init_module(void) |
| { |
| int err; |
| |
| register_netdevice_notifier(&macvlan_notifier_block); |
| |
| err = macvlan_link_register(&macvlan_link_ops); |
| if (err < 0) |
| goto err1; |
| return 0; |
| err1: |
| unregister_netdevice_notifier(&macvlan_notifier_block); |
| return err; |
| } |
| |
| static void __exit macvlan_cleanup_module(void) |
| { |
| rtnl_link_unregister(&macvlan_link_ops); |
| unregister_netdevice_notifier(&macvlan_notifier_block); |
| } |
| |
| module_init(macvlan_init_module); |
| module_exit(macvlan_cleanup_module); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| MODULE_DESCRIPTION("Driver for MAC address based VLANs"); |
| MODULE_ALIAS_RTNL_LINK("macvlan"); |