[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/macvlan.c b/ap/os/linux/linux-3.4.x/drivers/net/macvlan.c
new file mode 100644
index 0000000..6749acf
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/macvlan.c
@@ -0,0 +1,883 @@
+/*
+ * 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_vlan.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;
+ bool passthru;
+ int count;
+};
+
+static void macvlan_port_destroy(struct net_device *dev);
+
+#define macvlan_port_get_rcu(dev) \
+ ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
+#define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
+#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
+
+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, bool sync)
+{
+ hlist_del_rcu(&vlan->hlist);
+ if (sync)
+ synchronize_rcu();
+}
+
+static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
+ const unsigned char *addr)
+{
+ macvlan_hash_del(vlan, true);
+ /* 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 rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
+{
+ struct macvlan_port *port;
+ struct sk_buff *skb = *pskb;
+ const struct ethhdr *eth = eth_hdr(skb);
+ const struct macvlan_dev *vlan;
+ const struct macvlan_dev *src;
+ struct net_device *dev;
+ unsigned int len = 0;
+ int ret = NET_RX_DROP;
+
+ port = macvlan_port_get_rcu(skb->dev);
+ if (is_multicast_ether_addr(eth->h_dest)) {
+ skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
+ if (!skb)
+ return RX_HANDLER_CONSUMED;
+ eth = eth_hdr(skb);
+ 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_PASSTHRU|
+ 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);
+ else {
+ /* forward to original port. */
+ vlan = src;
+ ret = macvlan_broadcast_one(skb, vlan, eth, 0);
+ goto out;
+ }
+
+ return RX_HANDLER_PASS;
+ }
+
+ if (port->passthru)
+ vlan = list_first_or_null_rcu(&port->vlans,
+ struct macvlan_dev, list);
+ else
+ vlan = macvlan_hash_lookup(port, eth->h_dest);
+ if (vlan == NULL)
+ return RX_HANDLER_PASS;
+
+ dev = vlan->dev;
+ if (unlikely(!(dev->flags & IFF_UP))) {
+ kfree_skb(skb);
+ return RX_HANDLER_CONSUMED;
+ }
+ len = skb->len + ETH_HLEN;
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb)
+ goto out;
+
+ skb->dev = dev;
+ skb->pkt_type = PACKET_HOST;
+
+ ret = vlan->receive(skb);
+
+out:
+ macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
+ return RX_HANDLER_CONSUMED;
+}
+
+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) {
+ /* send to lowerdev first for its network taps */
+ dev_forward_skb(vlan->lowerdev, skb);
+
+ return NET_XMIT_SUCCESS;
+ }
+ }
+
+xmit_world:
+ skb->dev = vlan->lowerdev;
+ return dev_queue_xmit(skb);
+}
+
+netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ unsigned int len = skb->len;
+ int ret;
+ const struct macvlan_dev *vlan = netdev_priv(dev);
+
+ ret = macvlan_queue_xmit(skb, dev);
+ if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
+ struct macvlan_pcpu_stats *pcpu_stats;
+
+ pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
+ u64_stats_update_begin(&pcpu_stats->syncp);
+ pcpu_stats->tx_packets++;
+ pcpu_stats->tx_bytes += len;
+ u64_stats_update_end(&pcpu_stats->syncp);
+ } else {
+ this_cpu_inc(vlan->pcpu_stats->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;
+
+ if (vlan->port->passthru) {
+ dev_set_promiscuity(lowerdev, 1);
+ goto hash_add;
+ }
+
+ 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;
+ }
+
+hash_add:
+ 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;
+
+ if (vlan->port->passthru) {
+ dev_set_promiscuity(lowerdev, -1);
+ goto hash_del;
+ }
+
+ dev_mc_unsync(lowerdev, dev);
+ if (dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(lowerdev, -1);
+
+ dev_uc_del(lowerdev, dev->dev_addr);
+
+hash_del:
+ macvlan_hash_del(vlan, !dev->dismantle);
+ 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 */
+ dev->addr_assign_type &= ~NET_ADDR_RANDOM;
+ 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 | NETIF_F_RXCSUM | \
+ NETIF_F_HW_VLAN_FILTER)
+
+#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->features |= NETIF_F_LLTX;
+ dev->vlan_features = lowerdev->vlan_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->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
+ if (!vlan->pcpu_stats)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void macvlan_uninit(struct net_device *dev)
+{
+ struct macvlan_dev *vlan = netdev_priv(dev);
+ struct macvlan_port *port = vlan->port;
+
+ free_percpu(vlan->pcpu_stats);
+
+ port->count -= 1;
+ if (!port->count)
+ macvlan_port_destroy(port->dev);
+}
+
+static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct macvlan_dev *vlan = netdev_priv(dev);
+
+ if (vlan->pcpu_stats) {
+ struct macvlan_pcpu_stats *p;
+ u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
+ u32 rx_errors = 0, tx_dropped = 0;
+ unsigned int start;
+ int i;
+
+ for_each_possible_cpu(i) {
+ p = per_cpu_ptr(vlan->pcpu_stats, i);
+ do {
+ start = u64_stats_fetch_begin_bh(&p->syncp);
+ rx_packets = p->rx_packets;
+ rx_bytes = p->rx_bytes;
+ rx_multicast = p->rx_multicast;
+ tx_packets = p->tx_packets;
+ tx_bytes = p->tx_bytes;
+ } while (u64_stats_fetch_retry_bh(&p->syncp, start));
+
+ stats->rx_packets += rx_packets;
+ stats->rx_bytes += rx_bytes;
+ stats->multicast += rx_multicast;
+ stats->tx_packets += tx_packets;
+ stats->tx_bytes += tx_bytes;
+ /* rx_errors & tx_dropped are u32, updated
+ * without syncp protection.
+ */
+ rx_errors += p->rx_errors;
+ tx_dropped += p->tx_dropped;
+ }
+ stats->rx_errors = rx_errors;
+ stats->rx_dropped = rx_errors;
+ stats->tx_dropped = tx_dropped;
+ }
+ return stats;
+}
+
+static int macvlan_vlan_rx_add_vid(struct net_device *dev,
+ unsigned short vid)
+{
+ struct macvlan_dev *vlan = netdev_priv(dev);
+ struct net_device *lowerdev = vlan->lowerdev;
+
+ return vlan_vid_add(lowerdev, vid);
+}
+
+static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
+ unsigned short vid)
+{
+ struct macvlan_dev *vlan = netdev_priv(dev);
+ struct net_device *lowerdev = vlan->lowerdev;
+
+ vlan_vid_del(lowerdev, vid);
+ return 0;
+}
+
+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 int macvlan_ethtool_get_settings(struct net_device *dev,
+ struct ethtool_cmd *cmd)
+{
+ const struct macvlan_dev *vlan = netdev_priv(dev);
+
+ return __ethtool_get_settings(vlan->lowerdev, cmd);
+}
+
+static const struct ethtool_ops macvlan_ethtool_ops = {
+ .get_link = ethtool_op_get_link,
+ .get_settings = macvlan_ethtool_get_settings,
+ .get_drvinfo = macvlan_ethtool_get_drvinfo,
+};
+
+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_rx_mode = macvlan_set_multicast_list,
+ .ndo_get_stats64 = macvlan_dev_get_stats64,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
+};
+
+void macvlan_common_setup(struct net_device *dev)
+{
+ ether_setup(dev);
+
+ dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
+ dev->priv_flags |= IFF_UNICAST_FLT;
+ dev->netdev_ops = &macvlan_netdev_ops;
+ dev->destructor = free_netdev;
+ dev->header_ops = &macvlan_hard_header_ops,
+ dev->ethtool_ops = &macvlan_ethtool_ops;
+}
+EXPORT_SYMBOL_GPL(macvlan_common_setup);
+
+static void macvlan_setup(struct net_device *dev)
+{
+ macvlan_common_setup(dev);
+ 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->passthru = false;
+ port->dev = dev;
+ INIT_LIST_HEAD(&port->vlans);
+ for (i = 0; i < MACVLAN_HASH_SIZE; i++)
+ INIT_HLIST_HEAD(&port->vlan_hash[i]);
+
+ err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
+ if (err)
+ kfree(port);
+ else
+ dev->priv_flags |= IFF_MACVLAN_PORT;
+ return err;
+}
+
+static void macvlan_port_destroy(struct net_device *dev)
+{
+ struct macvlan_port *port = macvlan_port_get(dev);
+
+ dev->priv_flags &= ~IFF_MACVLAN_PORT;
+ netdev_rx_handler_unregister(dev);
+ kfree_rcu(port, rcu);
+}
+
+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:
+ case MACVLAN_MODE_PASSTHRU:
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+ 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])
+ eth_hw_addr_random(dev);
+
+ if (!macvlan_port_exists(lowerdev)) {
+ err = macvlan_port_create(lowerdev);
+ if (err < 0)
+ return err;
+ }
+ port = macvlan_port_get(lowerdev);
+
+ /* Only 1 macvlan device can be created in passthru mode */
+ if (port->passthru)
+ return -EINVAL;
+
+ 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]);
+
+ if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
+ if (port->count)
+ return -EINVAL;
+ port->passthru = true;
+ memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
+ }
+
+ port->count += 1;
+ err = register_netdevice(dev);
+ if (err < 0)
+ goto destroy_port;
+
+ list_add_tail_rcu(&vlan->list, &port->vlans);
+ netif_stacked_transfer_operstate(lowerdev, dev);
+
+ return 0;
+
+destroy_port:
+ port->count -= 1;
+ if (!port->count)
+ 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);
+
+ list_del_rcu(&vlan->list);
+ unregister_netdevice_queue(dev, head);
+}
+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->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",
+ .setup = macvlan_setup,
+ .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;
+ LIST_HEAD(list_kill);
+
+ if (!macvlan_port_exists(dev))
+ return NOTIFY_DONE;
+
+ port = macvlan_port_get(dev);
+
+ 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:
+ /* twiddle thumbs on netns device moves */
+ if (dev->reg_state != NETREG_UNREGISTERING)
+ break;
+
+ list_for_each_entry_safe(vlan, next, &port->vlans, list)
+ vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
+ unregister_netdevice_many(&list_kill);
+ list_del(&list_kill);
+ 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");