873 lines
22 KiB
C
873 lines
22 KiB
C
/*
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* Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* The code this is based on carried the following copyright notice:
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* ---
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* (C) Copyright 2001-2006
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* Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com
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* Re-worked by Ben Greear <greearb@candelatech.com>
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* ---
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/rculist.h>
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#include <linux/notifier.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/if_arp.h>
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#include <linux/if_link.h>
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#include <linux/if_macvlan.h>
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#include <net/rtnetlink.h>
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#include <net/xfrm.h>
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#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
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struct macvlan_port {
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struct net_device *dev;
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struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
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struct list_head vlans;
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struct rcu_head rcu;
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bool passthru;
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int count;
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};
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static void macvlan_port_destroy(struct net_device *dev);
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#define macvlan_port_get_rcu(dev) \
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((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
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#define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
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#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
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static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
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const unsigned char *addr)
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{
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struct macvlan_dev *vlan;
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struct hlist_node *n;
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hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) {
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if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr))
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return vlan;
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}
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return NULL;
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}
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static void macvlan_hash_add(struct macvlan_dev *vlan)
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{
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struct macvlan_port *port = vlan->port;
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const unsigned char *addr = vlan->dev->dev_addr;
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hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]);
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}
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static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
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{
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hlist_del_rcu(&vlan->hlist);
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if (sync)
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synchronize_rcu();
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}
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static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
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const unsigned char *addr)
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{
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macvlan_hash_del(vlan, true);
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/* Now that we are unhashed it is safe to change the device
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* address without confusing packet delivery.
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*/
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memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
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macvlan_hash_add(vlan);
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}
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static int macvlan_addr_busy(const struct macvlan_port *port,
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const unsigned char *addr)
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{
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/* Test to see if the specified multicast address is
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* currently in use by the underlying device or
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* another macvlan.
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*/
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if (!compare_ether_addr_64bits(port->dev->dev_addr, addr))
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return 1;
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if (macvlan_hash_lookup(port, addr))
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return 1;
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return 0;
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}
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static int macvlan_broadcast_one(struct sk_buff *skb,
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const struct macvlan_dev *vlan,
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const struct ethhdr *eth, bool local)
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{
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struct net_device *dev = vlan->dev;
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if (!skb)
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return NET_RX_DROP;
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if (local)
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return vlan->forward(dev, skb);
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skb->dev = dev;
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if (!compare_ether_addr_64bits(eth->h_dest,
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dev->broadcast))
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skb->pkt_type = PACKET_BROADCAST;
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else
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skb->pkt_type = PACKET_MULTICAST;
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return vlan->receive(skb);
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}
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static void macvlan_broadcast(struct sk_buff *skb,
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const struct macvlan_port *port,
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struct net_device *src,
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enum macvlan_mode mode)
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{
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const struct ethhdr *eth = eth_hdr(skb);
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const struct macvlan_dev *vlan;
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struct hlist_node *n;
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struct sk_buff *nskb;
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unsigned int i;
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int err;
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if (skb->protocol == htons(ETH_P_PAUSE))
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return;
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for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
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hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) {
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if (vlan->dev == src || !(vlan->mode & mode))
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continue;
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nskb = skb_clone(skb, GFP_ATOMIC);
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err = macvlan_broadcast_one(nskb, vlan, eth,
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mode == MACVLAN_MODE_BRIDGE);
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macvlan_count_rx(vlan, skb->len + ETH_HLEN,
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err == NET_RX_SUCCESS, 1);
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}
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}
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}
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/* called under rcu_read_lock() from netif_receive_skb */
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static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
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{
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struct macvlan_port *port;
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struct sk_buff *skb = *pskb;
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const struct ethhdr *eth = eth_hdr(skb);
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const struct macvlan_dev *vlan;
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const struct macvlan_dev *src;
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struct net_device *dev;
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unsigned int len = 0;
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int ret = NET_RX_DROP;
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port = macvlan_port_get_rcu(skb->dev);
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if (is_multicast_ether_addr(eth->h_dest)) {
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src = macvlan_hash_lookup(port, eth->h_source);
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if (!src)
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/* frame comes from an external address */
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macvlan_broadcast(skb, port, NULL,
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MACVLAN_MODE_PRIVATE |
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MACVLAN_MODE_VEPA |
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MACVLAN_MODE_PASSTHRU|
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MACVLAN_MODE_BRIDGE);
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else if (src->mode == MACVLAN_MODE_VEPA)
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/* flood to everyone except source */
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macvlan_broadcast(skb, port, src->dev,
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MACVLAN_MODE_VEPA |
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MACVLAN_MODE_BRIDGE);
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else if (src->mode == MACVLAN_MODE_BRIDGE)
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/*
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* flood only to VEPA ports, bridge ports
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* already saw the frame on the way out.
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*/
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macvlan_broadcast(skb, port, src->dev,
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MACVLAN_MODE_VEPA);
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return RX_HANDLER_PASS;
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}
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if (port->passthru)
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vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
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else
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vlan = macvlan_hash_lookup(port, eth->h_dest);
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if (vlan == NULL)
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return RX_HANDLER_PASS;
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dev = vlan->dev;
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if (unlikely(!(dev->flags & IFF_UP))) {
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kfree_skb(skb);
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return RX_HANDLER_CONSUMED;
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}
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len = skb->len + ETH_HLEN;
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skb = skb_share_check(skb, GFP_ATOMIC);
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if (!skb)
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goto out;
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skb->dev = dev;
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skb->pkt_type = PACKET_HOST;
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ret = vlan->receive(skb);
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out:
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macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
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return RX_HANDLER_CONSUMED;
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}
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static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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const struct macvlan_dev *vlan = netdev_priv(dev);
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const struct macvlan_port *port = vlan->port;
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const struct macvlan_dev *dest;
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__u8 ip_summed = skb->ip_summed;
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if (vlan->mode == MACVLAN_MODE_BRIDGE) {
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const struct ethhdr *eth = (void *)skb->data;
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skb->ip_summed = CHECKSUM_UNNECESSARY;
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/* send to other bridge ports directly */
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if (is_multicast_ether_addr(eth->h_dest)) {
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macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
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goto xmit_world;
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}
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dest = macvlan_hash_lookup(port, eth->h_dest);
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if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
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/* send to lowerdev first for its network taps */
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vlan->forward(vlan->lowerdev, skb);
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return NET_XMIT_SUCCESS;
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}
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}
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xmit_world:
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skb->ip_summed = ip_summed;
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skb_set_dev(skb, vlan->lowerdev);
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return dev_queue_xmit(skb);
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}
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netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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unsigned int len = skb->len;
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int ret;
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const struct macvlan_dev *vlan = netdev_priv(dev);
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ret = macvlan_queue_xmit(skb, dev);
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if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
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struct macvlan_pcpu_stats *pcpu_stats;
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pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
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u64_stats_update_begin(&pcpu_stats->syncp);
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pcpu_stats->tx_packets++;
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pcpu_stats->tx_bytes += len;
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u64_stats_update_end(&pcpu_stats->syncp);
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} else {
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this_cpu_inc(vlan->pcpu_stats->tx_dropped);
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(macvlan_start_xmit);
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static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
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unsigned short type, const void *daddr,
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const void *saddr, unsigned len)
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{
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const struct macvlan_dev *vlan = netdev_priv(dev);
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struct net_device *lowerdev = vlan->lowerdev;
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return dev_hard_header(skb, lowerdev, type, daddr,
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saddr ? : dev->dev_addr, len);
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}
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static const struct header_ops macvlan_hard_header_ops = {
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.create = macvlan_hard_header,
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.rebuild = eth_rebuild_header,
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.parse = eth_header_parse,
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.cache = eth_header_cache,
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.cache_update = eth_header_cache_update,
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};
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static int macvlan_open(struct net_device *dev)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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struct net_device *lowerdev = vlan->lowerdev;
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int err;
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if (vlan->port->passthru) {
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dev_set_promiscuity(lowerdev, 1);
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goto hash_add;
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}
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err = -EBUSY;
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if (macvlan_addr_busy(vlan->port, dev->dev_addr))
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goto out;
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err = dev_uc_add(lowerdev, dev->dev_addr);
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if (err < 0)
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goto out;
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if (dev->flags & IFF_ALLMULTI) {
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err = dev_set_allmulti(lowerdev, 1);
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if (err < 0)
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goto del_unicast;
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}
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hash_add:
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macvlan_hash_add(vlan);
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return 0;
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del_unicast:
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dev_uc_del(lowerdev, dev->dev_addr);
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out:
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return err;
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}
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static int macvlan_stop(struct net_device *dev)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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struct net_device *lowerdev = vlan->lowerdev;
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if (vlan->port->passthru) {
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dev_set_promiscuity(lowerdev, -1);
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goto hash_del;
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}
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dev_mc_unsync(lowerdev, dev);
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if (dev->flags & IFF_ALLMULTI)
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dev_set_allmulti(lowerdev, -1);
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dev_uc_del(lowerdev, dev->dev_addr);
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hash_del:
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macvlan_hash_del(vlan, !dev->dismantle);
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return 0;
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}
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static int macvlan_set_mac_address(struct net_device *dev, void *p)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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struct net_device *lowerdev = vlan->lowerdev;
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struct sockaddr *addr = p;
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int err;
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if (!is_valid_ether_addr(addr->sa_data))
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return -EADDRNOTAVAIL;
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if (!(dev->flags & IFF_UP)) {
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/* Just copy in the new address */
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memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
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} else {
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/* Rehash and update the device filters */
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if (macvlan_addr_busy(vlan->port, addr->sa_data))
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return -EBUSY;
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err = dev_uc_add(lowerdev, addr->sa_data);
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if (err)
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return err;
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dev_uc_del(lowerdev, dev->dev_addr);
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macvlan_hash_change_addr(vlan, addr->sa_data);
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}
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return 0;
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}
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static void macvlan_change_rx_flags(struct net_device *dev, int change)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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struct net_device *lowerdev = vlan->lowerdev;
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if (change & IFF_ALLMULTI)
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dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
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}
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static void macvlan_set_multicast_list(struct net_device *dev)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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dev_mc_sync(vlan->lowerdev, dev);
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}
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static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
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return -EINVAL;
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dev->mtu = new_mtu;
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return 0;
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}
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/*
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* macvlan network devices have devices nesting below it and are a special
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* "super class" of normal network devices; split their locks off into a
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* separate class since they always nest.
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*/
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static struct lock_class_key macvlan_netdev_xmit_lock_key;
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static struct lock_class_key macvlan_netdev_addr_lock_key;
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#define MACVLAN_FEATURES \
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(NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
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NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
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NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
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NETIF_F_HW_VLAN_FILTER)
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#define MACVLAN_STATE_MASK \
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((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
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static void macvlan_set_lockdep_class_one(struct net_device *dev,
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struct netdev_queue *txq,
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void *_unused)
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{
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lockdep_set_class(&txq->_xmit_lock,
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&macvlan_netdev_xmit_lock_key);
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}
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static void macvlan_set_lockdep_class(struct net_device *dev)
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{
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lockdep_set_class(&dev->addr_list_lock,
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&macvlan_netdev_addr_lock_key);
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netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
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}
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static int macvlan_init(struct net_device *dev)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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const struct net_device *lowerdev = vlan->lowerdev;
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dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
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(lowerdev->state & MACVLAN_STATE_MASK);
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dev->features = lowerdev->features & MACVLAN_FEATURES;
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dev->features |= NETIF_F_LLTX;
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dev->gso_max_size = lowerdev->gso_max_size;
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dev->iflink = lowerdev->ifindex;
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dev->hard_header_len = lowerdev->hard_header_len;
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macvlan_set_lockdep_class(dev);
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vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
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if (!vlan->pcpu_stats)
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return -ENOMEM;
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return 0;
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}
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static void macvlan_uninit(struct net_device *dev)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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struct macvlan_port *port = vlan->port;
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free_percpu(vlan->pcpu_stats);
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port->count -= 1;
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if (!port->count)
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macvlan_port_destroy(port->dev);
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}
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static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
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struct rtnl_link_stats64 *stats)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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if (vlan->pcpu_stats) {
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struct macvlan_pcpu_stats *p;
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u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
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u32 rx_errors = 0, tx_dropped = 0;
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unsigned int start;
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int i;
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for_each_possible_cpu(i) {
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p = per_cpu_ptr(vlan->pcpu_stats, i);
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do {
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start = u64_stats_fetch_begin_bh(&p->syncp);
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rx_packets = p->rx_packets;
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rx_bytes = p->rx_bytes;
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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 void 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;
|
|
const struct net_device_ops *ops = lowerdev->netdev_ops;
|
|
|
|
if (ops->ndo_vlan_rx_add_vid)
|
|
ops->ndo_vlan_rx_add_vid(lowerdev, vid);
|
|
}
|
|
|
|
static void 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;
|
|
const struct net_device_ops *ops = lowerdev->netdev_ops;
|
|
|
|
if (ops->ndo_vlan_rx_kill_vid)
|
|
ops->ndo_vlan_rx_kill_vid(lowerdev, vid);
|
|
}
|
|
|
|
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 dev_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_multicast_list = 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->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])
|
|
random_ether_addr(dev->dev_addr);
|
|
|
|
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(&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(&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");
|