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![Gao Feng](/assets/img/avatar_default.png)
When free macvlan_port in macvlan_port_destroy, it is safe to free directly because netdev_rx_handler_unregister could enforce one grace period. So it is unnecessary to use kfree_rcu for macvlan_port. Signed-off-by: Gao Feng <fgao@ikuai8.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1654 lines
41 KiB
C
1654 lines
41 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_vlan.h>
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#include <linux/if_link.h>
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#include <linux/if_macvlan.h>
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#include <linux/hash.h>
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#include <linux/workqueue.h>
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#include <net/rtnetlink.h>
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#include <net/xfrm.h>
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#include <linux/netpoll.h>
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#define MACVLAN_HASH_BITS 8
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#define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS)
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#define MACVLAN_BC_QUEUE_LEN 1000
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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 sk_buff_head bc_queue;
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struct work_struct bc_work;
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bool passthru;
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int count;
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struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE];
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DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
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};
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struct macvlan_source_entry {
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struct hlist_node hlist;
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struct macvlan_dev *vlan;
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unsigned char addr[6+2] __aligned(sizeof(u16));
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struct rcu_head rcu;
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};
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struct macvlan_skb_cb {
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const struct macvlan_dev *src;
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};
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#define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
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static void macvlan_port_destroy(struct net_device *dev);
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/* Hash Ethernet address */
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static u32 macvlan_eth_hash(const unsigned char *addr)
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{
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u64 value = get_unaligned((u64 *)addr);
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/* only want 6 bytes */
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#ifdef __BIG_ENDIAN
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value >>= 16;
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#else
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value <<= 16;
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#endif
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return hash_64(value, MACVLAN_HASH_BITS);
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}
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static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
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{
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return rcu_dereference(dev->rx_handler_data);
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}
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static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev)
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{
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return rtnl_dereference(dev->rx_handler_data);
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}
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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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u32 idx = macvlan_eth_hash(addr);
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hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) {
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if (ether_addr_equal_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 struct macvlan_source_entry *macvlan_hash_lookup_source(
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const struct macvlan_dev *vlan,
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const unsigned char *addr)
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{
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struct macvlan_source_entry *entry;
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u32 idx = macvlan_eth_hash(addr);
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struct hlist_head *h = &vlan->port->vlan_source_hash[idx];
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hlist_for_each_entry_rcu(entry, h, hlist) {
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if (ether_addr_equal_64bits(entry->addr, addr) &&
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entry->vlan == vlan)
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return entry;
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}
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return NULL;
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}
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static int macvlan_hash_add_source(struct macvlan_dev *vlan,
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const unsigned char *addr)
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{
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struct macvlan_port *port = vlan->port;
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struct macvlan_source_entry *entry;
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struct hlist_head *h;
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entry = macvlan_hash_lookup_source(vlan, addr);
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if (entry)
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return 0;
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entry = kmalloc(sizeof(*entry), GFP_KERNEL);
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if (!entry)
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return -ENOMEM;
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ether_addr_copy(entry->addr, addr);
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entry->vlan = vlan;
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h = &port->vlan_source_hash[macvlan_eth_hash(addr)];
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hlist_add_head_rcu(&entry->hlist, h);
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vlan->macaddr_count++;
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return 0;
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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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u32 idx = macvlan_eth_hash(addr);
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hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]);
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}
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static void macvlan_hash_del_source(struct macvlan_source_entry *entry)
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{
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hlist_del_rcu(&entry->hlist);
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kfree_rcu(entry, rcu);
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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 bool 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 (ether_addr_equal_64bits(port->dev->dev_addr, addr))
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return true;
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if (macvlan_hash_lookup(port, addr))
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return true;
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return false;
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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 (local)
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return __dev_forward_skb(dev, skb);
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skb->dev = dev;
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if (ether_addr_equal_64bits(eth->h_dest, 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 0;
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}
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static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
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{
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return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT);
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}
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static unsigned int mc_hash(const struct macvlan_dev *vlan,
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const unsigned char *addr)
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{
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u32 val = __get_unaligned_cpu32(addr + 2);
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val ^= macvlan_hash_mix(vlan);
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return hash_32(val, MACVLAN_MC_FILTER_BITS);
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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 sk_buff *nskb;
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unsigned int i;
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int err;
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unsigned int hash;
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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, &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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hash = mc_hash(vlan, eth->h_dest);
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if (!test_bit(hash, vlan->mc_filter))
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continue;
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err = NET_RX_DROP;
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nskb = skb_clone(skb, GFP_ATOMIC);
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if (likely(nskb))
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err = macvlan_broadcast_one(
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nskb, vlan, eth,
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mode == MACVLAN_MODE_BRIDGE) ?:
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netif_rx_ni(nskb);
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macvlan_count_rx(vlan, skb->len + ETH_HLEN,
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err == NET_RX_SUCCESS, true);
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}
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}
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}
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static void macvlan_process_broadcast(struct work_struct *w)
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{
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struct macvlan_port *port = container_of(w, struct macvlan_port,
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bc_work);
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struct sk_buff *skb;
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struct sk_buff_head list;
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__skb_queue_head_init(&list);
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spin_lock_bh(&port->bc_queue.lock);
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skb_queue_splice_tail_init(&port->bc_queue, &list);
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spin_unlock_bh(&port->bc_queue.lock);
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while ((skb = __skb_dequeue(&list))) {
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const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
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rcu_read_lock();
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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
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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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rcu_read_unlock();
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if (src)
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dev_put(src->dev);
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kfree_skb(skb);
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}
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}
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static void macvlan_broadcast_enqueue(struct macvlan_port *port,
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const struct macvlan_dev *src,
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struct sk_buff *skb)
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{
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struct sk_buff *nskb;
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int err = -ENOMEM;
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nskb = skb_clone(skb, GFP_ATOMIC);
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if (!nskb)
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goto err;
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MACVLAN_SKB_CB(nskb)->src = src;
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spin_lock(&port->bc_queue.lock);
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if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) {
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if (src)
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dev_hold(src->dev);
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__skb_queue_tail(&port->bc_queue, nskb);
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err = 0;
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}
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spin_unlock(&port->bc_queue.lock);
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if (err)
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goto free_nskb;
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schedule_work(&port->bc_work);
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return;
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free_nskb:
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kfree_skb(nskb);
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err:
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atomic_long_inc(&skb->dev->rx_dropped);
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}
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static void macvlan_flush_sources(struct macvlan_port *port,
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struct macvlan_dev *vlan)
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{
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int i;
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for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
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struct hlist_node *h, *n;
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hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) {
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struct macvlan_source_entry *entry;
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entry = hlist_entry(h, struct macvlan_source_entry,
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hlist);
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if (entry->vlan == vlan)
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macvlan_hash_del_source(entry);
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}
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}
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vlan->macaddr_count = 0;
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}
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static void macvlan_forward_source_one(struct sk_buff *skb,
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struct macvlan_dev *vlan)
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{
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struct sk_buff *nskb;
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struct net_device *dev;
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int len;
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int ret;
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dev = vlan->dev;
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if (unlikely(!(dev->flags & IFF_UP)))
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return;
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nskb = skb_clone(skb, GFP_ATOMIC);
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if (!nskb)
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return;
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len = nskb->len + ETH_HLEN;
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nskb->dev = dev;
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nskb->pkt_type = PACKET_HOST;
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ret = netif_rx(nskb);
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macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
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}
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static void macvlan_forward_source(struct sk_buff *skb,
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struct macvlan_port *port,
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const unsigned char *addr)
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{
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struct macvlan_source_entry *entry;
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u32 idx = macvlan_eth_hash(addr);
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struct hlist_head *h = &port->vlan_source_hash[idx];
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hlist_for_each_entry_rcu(entry, h, hlist) {
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if (ether_addr_equal_64bits(entry->addr, addr))
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macvlan_forward_source_one(skb, entry->vlan);
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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;
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rx_handler_result_t handle_res;
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|
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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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unsigned int hash;
|
|
|
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skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN);
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if (!skb)
|
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return RX_HANDLER_CONSUMED;
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*pskb = skb;
|
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eth = eth_hdr(skb);
|
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macvlan_forward_source(skb, port, eth->h_source);
|
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src = macvlan_hash_lookup(port, eth->h_source);
|
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if (src && src->mode != MACVLAN_MODE_VEPA &&
|
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src->mode != MACVLAN_MODE_BRIDGE) {
|
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/* forward to original port. */
|
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vlan = src;
|
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ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?:
|
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netif_rx(skb);
|
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handle_res = RX_HANDLER_CONSUMED;
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goto out;
|
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}
|
|
|
|
hash = mc_hash(NULL, eth->h_dest);
|
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if (test_bit(hash, port->mc_filter))
|
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macvlan_broadcast_enqueue(port, src, skb);
|
|
|
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return RX_HANDLER_PASS;
|
|
}
|
|
|
|
macvlan_forward_source(skb, port, eth->h_source);
|
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if (port->passthru)
|
|
vlan = list_first_or_null_rcu(&port->vlans,
|
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struct macvlan_dev, list);
|
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else
|
|
vlan = macvlan_hash_lookup(port, eth->h_dest);
|
|
if (vlan == NULL)
|
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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) {
|
|
ret = NET_RX_DROP;
|
|
handle_res = RX_HANDLER_CONSUMED;
|
|
goto out;
|
|
}
|
|
|
|
*pskb = skb;
|
|
skb->dev = dev;
|
|
skb->pkt_type = PACKET_HOST;
|
|
|
|
ret = NET_RX_SUCCESS;
|
|
handle_res = RX_HANDLER_ANOTHER;
|
|
out:
|
|
macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
|
|
return handle_res;
|
|
}
|
|
|
|
static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
const struct macvlan_dev *vlan = netdev_priv(dev);
|
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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);
|
|
}
|
|
|
|
static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb)
|
|
{
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
if (vlan->netpoll)
|
|
netpoll_send_skb(vlan->netpoll, skb);
|
|
#else
|
|
BUG();
|
|
#endif
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
|
|
struct net_device *dev)
|
|
{
|
|
unsigned int len = skb->len;
|
|
int ret;
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
|
|
if (unlikely(netpoll_tx_running(dev)))
|
|
return macvlan_netpoll_send_skb(vlan, skb);
|
|
|
|
if (vlan->fwd_priv) {
|
|
skb->dev = vlan->lowerdev;
|
|
ret = dev_queue_xmit_accel(skb, vlan->fwd_priv);
|
|
} else {
|
|
ret = macvlan_queue_xmit(skb, dev);
|
|
}
|
|
|
|
if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
|
|
struct vlan_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;
|
|
}
|
|
|
|
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,
|
|
.parse = eth_header_parse,
|
|
.cache = eth_header_cache,
|
|
.cache_update = eth_header_cache_update,
|
|
};
|
|
|
|
static struct rtnl_link_ops macvlan_link_ops;
|
|
|
|
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) {
|
|
if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
|
|
err = dev_set_promiscuity(lowerdev, 1);
|
|
if (err < 0)
|
|
goto out;
|
|
}
|
|
goto hash_add;
|
|
}
|
|
|
|
if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD &&
|
|
dev->rtnl_link_ops == &macvlan_link_ops) {
|
|
vlan->fwd_priv =
|
|
lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);
|
|
|
|
/* If we get a NULL pointer back, or if we get an error
|
|
* then we should just fall through to the non accelerated path
|
|
*/
|
|
if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
|
|
vlan->fwd_priv = NULL;
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
if (dev->flags & IFF_PROMISC) {
|
|
err = dev_set_promiscuity(lowerdev, 1);
|
|
if (err < 0)
|
|
goto clear_multi;
|
|
}
|
|
|
|
hash_add:
|
|
macvlan_hash_add(vlan);
|
|
return 0;
|
|
|
|
clear_multi:
|
|
if (dev->flags & IFF_ALLMULTI)
|
|
dev_set_allmulti(lowerdev, -1);
|
|
del_unicast:
|
|
dev_uc_del(lowerdev, dev->dev_addr);
|
|
out:
|
|
if (vlan->fwd_priv) {
|
|
lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
|
|
vlan->fwd_priv);
|
|
vlan->fwd_priv = NULL;
|
|
}
|
|
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->fwd_priv) {
|
|
lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
|
|
vlan->fwd_priv);
|
|
vlan->fwd_priv = NULL;
|
|
return 0;
|
|
}
|
|
|
|
dev_uc_unsync(lowerdev, dev);
|
|
dev_mc_unsync(lowerdev, dev);
|
|
|
|
if (vlan->port->passthru) {
|
|
if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
|
|
dev_set_promiscuity(lowerdev, -1);
|
|
goto hash_del;
|
|
}
|
|
|
|
if (dev->flags & IFF_ALLMULTI)
|
|
dev_set_allmulti(lowerdev, -1);
|
|
|
|
if (dev->flags & IFF_PROMISC)
|
|
dev_set_promiscuity(lowerdev, -1);
|
|
|
|
dev_uc_del(lowerdev, dev->dev_addr);
|
|
|
|
hash_del:
|
|
macvlan_hash_del(vlan, !dev->dismantle);
|
|
return 0;
|
|
}
|
|
|
|
static int macvlan_sync_address(struct net_device *dev, unsigned char *addr)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
struct net_device *lowerdev = vlan->lowerdev;
|
|
int err;
|
|
|
|
if (!(dev->flags & IFF_UP)) {
|
|
/* Just copy in the new address */
|
|
ether_addr_copy(dev->dev_addr, addr);
|
|
} else {
|
|
/* Rehash and update the device filters */
|
|
if (macvlan_addr_busy(vlan->port, addr))
|
|
return -EBUSY;
|
|
|
|
if (!vlan->port->passthru) {
|
|
err = dev_uc_add(lowerdev, addr);
|
|
if (err)
|
|
return err;
|
|
|
|
dev_uc_del(lowerdev, dev->dev_addr);
|
|
}
|
|
|
|
macvlan_hash_change_addr(vlan, addr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int macvlan_set_mac_address(struct net_device *dev, void *p)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
struct sockaddr *addr = p;
|
|
|
|
if (!is_valid_ether_addr(addr->sa_data))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
|
|
dev_set_mac_address(vlan->lowerdev, addr);
|
|
return 0;
|
|
}
|
|
|
|
return macvlan_sync_address(dev, addr->sa_data);
|
|
}
|
|
|
|
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 (dev->flags & IFF_UP) {
|
|
if (change & IFF_ALLMULTI)
|
|
dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
|
|
if (change & IFF_PROMISC)
|
|
dev_set_promiscuity(lowerdev,
|
|
dev->flags & IFF_PROMISC ? 1 : -1);
|
|
|
|
}
|
|
}
|
|
|
|
static void macvlan_compute_filter(unsigned long *mc_filter,
|
|
struct net_device *dev,
|
|
struct macvlan_dev *vlan)
|
|
{
|
|
if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
|
|
bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ);
|
|
} else {
|
|
struct netdev_hw_addr *ha;
|
|
DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
|
|
|
|
bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
|
|
netdev_for_each_mc_addr(ha, dev) {
|
|
__set_bit(mc_hash(vlan, ha->addr), filter);
|
|
}
|
|
|
|
__set_bit(mc_hash(vlan, dev->broadcast), filter);
|
|
|
|
bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ);
|
|
}
|
|
}
|
|
|
|
static void macvlan_set_mac_lists(struct net_device *dev)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
|
|
macvlan_compute_filter(vlan->mc_filter, dev, vlan);
|
|
|
|
dev_uc_sync(vlan->lowerdev, dev);
|
|
dev_mc_sync(vlan->lowerdev, dev);
|
|
|
|
/* This is slightly inaccurate as we're including the subscription
|
|
* list of vlan->lowerdev too.
|
|
*
|
|
* Bug alert: This only works if everyone has the same broadcast
|
|
* address as lowerdev. As soon as someone changes theirs this
|
|
* will break.
|
|
*
|
|
* However, this is already broken as when you change your broadcast
|
|
* address we don't get called.
|
|
*
|
|
* The solution is to maintain a list of broadcast addresses like
|
|
* we do for uc/mc, if you care.
|
|
*/
|
|
macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL);
|
|
}
|
|
|
|
static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
|
|
if (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_addr_lock_key;
|
|
|
|
#define ALWAYS_ON_FEATURES \
|
|
(NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \
|
|
NETIF_F_GSO_ROBUST)
|
|
|
|
#define MACVLAN_FEATURES \
|
|
(NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
|
|
NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \
|
|
NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
|
|
NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
|
|
|
|
#define MACVLAN_STATE_MASK \
|
|
((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
|
|
|
|
static int macvlan_get_nest_level(struct net_device *dev)
|
|
{
|
|
return ((struct macvlan_dev *)netdev_priv(dev))->nest_level;
|
|
}
|
|
|
|
static void macvlan_set_lockdep_class(struct net_device *dev)
|
|
{
|
|
netdev_lockdep_set_classes(dev);
|
|
lockdep_set_class_and_subclass(&dev->addr_list_lock,
|
|
&macvlan_netdev_addr_lock_key,
|
|
macvlan_get_nest_level(dev));
|
|
}
|
|
|
|
static int macvlan_init(struct net_device *dev)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
const struct net_device *lowerdev = vlan->lowerdev;
|
|
struct macvlan_port *port = vlan->port;
|
|
|
|
dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
|
|
(lowerdev->state & MACVLAN_STATE_MASK);
|
|
dev->features = lowerdev->features & MACVLAN_FEATURES;
|
|
dev->features |= ALWAYS_ON_FEATURES;
|
|
dev->hw_features |= NETIF_F_LRO;
|
|
dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES;
|
|
dev->gso_max_size = lowerdev->gso_max_size;
|
|
dev->gso_max_segs = lowerdev->gso_max_segs;
|
|
dev->hard_header_len = lowerdev->hard_header_len;
|
|
|
|
macvlan_set_lockdep_class(dev);
|
|
|
|
vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
|
|
if (!vlan->pcpu_stats)
|
|
return -ENOMEM;
|
|
|
|
port->count += 1;
|
|
|
|
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);
|
|
|
|
macvlan_flush_sources(port, vlan);
|
|
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 vlan_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_irq(&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_irq(&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,
|
|
__be16 proto, u16 vid)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
struct net_device *lowerdev = vlan->lowerdev;
|
|
|
|
return vlan_vid_add(lowerdev, proto, vid);
|
|
}
|
|
|
|
static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
|
|
__be16 proto, u16 vid)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
struct net_device *lowerdev = vlan->lowerdev;
|
|
|
|
vlan_vid_del(lowerdev, proto, vid);
|
|
return 0;
|
|
}
|
|
|
|
static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
|
|
struct net_device *dev,
|
|
const unsigned char *addr, u16 vid,
|
|
u16 flags)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
int err = -EINVAL;
|
|
|
|
/* Support unicast filter only on passthru devices.
|
|
* Multicast filter should be allowed on all devices.
|
|
*/
|
|
if (!vlan->port->passthru && is_unicast_ether_addr(addr))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (flags & NLM_F_REPLACE)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (is_unicast_ether_addr(addr))
|
|
err = dev_uc_add_excl(dev, addr);
|
|
else if (is_multicast_ether_addr(addr))
|
|
err = dev_mc_add_excl(dev, addr);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
|
|
struct net_device *dev,
|
|
const unsigned char *addr, u16 vid)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
int err = -EINVAL;
|
|
|
|
/* Support unicast filter only on passthru devices.
|
|
* Multicast filter should be allowed on all devices.
|
|
*/
|
|
if (!vlan->port->passthru && is_unicast_ether_addr(addr))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (is_unicast_ether_addr(addr))
|
|
err = dev_uc_del(dev, addr);
|
|
else if (is_multicast_ether_addr(addr))
|
|
err = dev_mc_del(dev, addr);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *drvinfo)
|
|
{
|
|
strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
|
|
strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
|
|
}
|
|
|
|
static int macvlan_ethtool_get_link_ksettings(struct net_device *dev,
|
|
struct ethtool_link_ksettings *cmd)
|
|
{
|
|
const struct macvlan_dev *vlan = netdev_priv(dev);
|
|
|
|
return __ethtool_get_link_ksettings(vlan->lowerdev, cmd);
|
|
}
|
|
|
|
static netdev_features_t macvlan_fix_features(struct net_device *dev,
|
|
netdev_features_t features)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
netdev_features_t lowerdev_features = vlan->lowerdev->features;
|
|
netdev_features_t mask;
|
|
|
|
features |= NETIF_F_ALL_FOR_ALL;
|
|
features &= (vlan->set_features | ~MACVLAN_FEATURES);
|
|
mask = features;
|
|
|
|
lowerdev_features &= (features | ~NETIF_F_LRO);
|
|
features = netdev_increment_features(lowerdev_features, features, mask);
|
|
features |= ALWAYS_ON_FEATURES;
|
|
features &= ~NETIF_F_NETNS_LOCAL;
|
|
|
|
return features;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void macvlan_dev_poll_controller(struct net_device *dev)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
struct net_device *real_dev = vlan->lowerdev;
|
|
struct netpoll *netpoll;
|
|
int err = 0;
|
|
|
|
netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
|
|
err = -ENOMEM;
|
|
if (!netpoll)
|
|
goto out;
|
|
|
|
err = __netpoll_setup(netpoll, real_dev);
|
|
if (err) {
|
|
kfree(netpoll);
|
|
goto out;
|
|
}
|
|
|
|
vlan->netpoll = netpoll;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static void macvlan_dev_netpoll_cleanup(struct net_device *dev)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
struct netpoll *netpoll = vlan->netpoll;
|
|
|
|
if (!netpoll)
|
|
return;
|
|
|
|
vlan->netpoll = NULL;
|
|
|
|
__netpoll_free_async(netpoll);
|
|
}
|
|
#endif /* CONFIG_NET_POLL_CONTROLLER */
|
|
|
|
static int macvlan_dev_get_iflink(const struct net_device *dev)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
|
|
return vlan->lowerdev->ifindex;
|
|
}
|
|
|
|
static const struct ethtool_ops macvlan_ethtool_ops = {
|
|
.get_link = ethtool_op_get_link,
|
|
.get_link_ksettings = macvlan_ethtool_get_link_ksettings,
|
|
.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_fix_features = macvlan_fix_features,
|
|
.ndo_change_rx_flags = macvlan_change_rx_flags,
|
|
.ndo_set_mac_address = macvlan_set_mac_address,
|
|
.ndo_set_rx_mode = macvlan_set_mac_lists,
|
|
.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,
|
|
.ndo_fdb_add = macvlan_fdb_add,
|
|
.ndo_fdb_del = macvlan_fdb_del,
|
|
.ndo_fdb_dump = ndo_dflt_fdb_dump,
|
|
.ndo_get_lock_subclass = macvlan_get_nest_level,
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
.ndo_poll_controller = macvlan_dev_poll_controller,
|
|
.ndo_netpoll_setup = macvlan_dev_netpoll_setup,
|
|
.ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup,
|
|
#endif
|
|
.ndo_get_iflink = macvlan_dev_get_iflink,
|
|
.ndo_features_check = passthru_features_check,
|
|
};
|
|
|
|
void macvlan_common_setup(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
|
|
dev->min_mtu = 0;
|
|
dev->max_mtu = ETH_MAX_MTU;
|
|
dev->priv_flags &= ~IFF_TX_SKB_SHARING;
|
|
netif_keep_dst(dev);
|
|
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->priv_flags |= IFF_NO_QUEUE;
|
|
}
|
|
|
|
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;
|
|
|
|
if (netif_is_ipvlan_port(dev))
|
|
return -EBUSY;
|
|
|
|
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]);
|
|
for (i = 0; i < MACVLAN_HASH_SIZE; i++)
|
|
INIT_HLIST_HEAD(&port->vlan_source_hash[i]);
|
|
|
|
skb_queue_head_init(&port->bc_queue);
|
|
INIT_WORK(&port->bc_work, macvlan_process_broadcast);
|
|
|
|
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_rtnl(dev);
|
|
|
|
dev->priv_flags &= ~IFF_MACVLAN_PORT;
|
|
netdev_rx_handler_unregister(dev);
|
|
|
|
/* After this point, no packet can schedule bc_work anymore,
|
|
* but we need to cancel it and purge left skbs if any.
|
|
*/
|
|
cancel_work_sync(&port->bc_work);
|
|
__skb_queue_purge(&port->bc_queue);
|
|
|
|
kfree(port);
|
|
}
|
|
|
|
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_FLAGS] &&
|
|
nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)
|
|
return -EINVAL;
|
|
|
|
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:
|
|
case MACVLAN_MODE_SOURCE:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
|
|
switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) {
|
|
case MACVLAN_MACADDR_ADD:
|
|
case MACVLAN_MACADDR_DEL:
|
|
case MACVLAN_MACADDR_FLUSH:
|
|
case MACVLAN_MACADDR_SET:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (data && data[IFLA_MACVLAN_MACADDR]) {
|
|
if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN)
|
|
return -EINVAL;
|
|
|
|
if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR])))
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
|
|
if (data && data[IFLA_MACVLAN_MACADDR_COUNT])
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* reconfigure list of remote source mac address
|
|
* (only for macvlan devices in source mode)
|
|
* Note regarding alignment: all netlink data is aligned to 4 Byte, which
|
|
* suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
|
|
*/
|
|
static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode,
|
|
struct nlattr *data[])
|
|
{
|
|
char *addr = NULL;
|
|
int ret, rem, len;
|
|
struct nlattr *nla, *head;
|
|
struct macvlan_source_entry *entry;
|
|
|
|
if (data[IFLA_MACVLAN_MACADDR])
|
|
addr = nla_data(data[IFLA_MACVLAN_MACADDR]);
|
|
|
|
if (mode == MACVLAN_MACADDR_ADD) {
|
|
if (!addr)
|
|
return -EINVAL;
|
|
|
|
return macvlan_hash_add_source(vlan, addr);
|
|
|
|
} else if (mode == MACVLAN_MACADDR_DEL) {
|
|
if (!addr)
|
|
return -EINVAL;
|
|
|
|
entry = macvlan_hash_lookup_source(vlan, addr);
|
|
if (entry) {
|
|
macvlan_hash_del_source(entry);
|
|
vlan->macaddr_count--;
|
|
}
|
|
} else if (mode == MACVLAN_MACADDR_FLUSH) {
|
|
macvlan_flush_sources(vlan->port, vlan);
|
|
} else if (mode == MACVLAN_MACADDR_SET) {
|
|
macvlan_flush_sources(vlan->port, vlan);
|
|
|
|
if (addr) {
|
|
ret = macvlan_hash_add_source(vlan, addr);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (!data || !data[IFLA_MACVLAN_MACADDR_DATA])
|
|
return 0;
|
|
|
|
head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]);
|
|
len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]);
|
|
|
|
nla_for_each_attr(nla, head, len, rem) {
|
|
if (nla_type(nla) != IFLA_MACVLAN_MACADDR ||
|
|
nla_len(nla) != ETH_ALEN)
|
|
continue;
|
|
|
|
addr = nla_data(nla);
|
|
ret = macvlan_hash_add_source(vlan, addr);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
|
|
struct nlattr *tb[], struct nlattr *data[])
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
struct macvlan_port *port;
|
|
struct net_device *lowerdev;
|
|
int err;
|
|
int macmode;
|
|
bool create = false;
|
|
|
|
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 or macvtaps on top of other macvlans - use
|
|
* the real device as the lowerdev.
|
|
*/
|
|
if (netif_is_macvlan(lowerdev))
|
|
lowerdev = macvlan_dev_real_dev(lowerdev);
|
|
|
|
if (!tb[IFLA_MTU])
|
|
dev->mtu = lowerdev->mtu;
|
|
else if (dev->mtu > lowerdev->mtu)
|
|
return -EINVAL;
|
|
|
|
/* MTU range: 68 - lowerdev->max_mtu */
|
|
dev->min_mtu = ETH_MIN_MTU;
|
|
dev->max_mtu = lowerdev->max_mtu;
|
|
|
|
if (!tb[IFLA_ADDRESS])
|
|
eth_hw_addr_random(dev);
|
|
|
|
if (!macvlan_port_exists(lowerdev)) {
|
|
err = macvlan_port_create(lowerdev);
|
|
if (err < 0)
|
|
return err;
|
|
create = true;
|
|
}
|
|
port = macvlan_port_get_rtnl(lowerdev);
|
|
|
|
/* Only 1 macvlan device can be created in passthru mode */
|
|
if (port->passthru) {
|
|
/* The macvlan port must be not created this time,
|
|
* still goto destroy_macvlan_port for readability.
|
|
*/
|
|
err = -EINVAL;
|
|
goto destroy_macvlan_port;
|
|
}
|
|
|
|
vlan->lowerdev = lowerdev;
|
|
vlan->dev = dev;
|
|
vlan->port = port;
|
|
vlan->set_features = MACVLAN_FEATURES;
|
|
vlan->nest_level = dev_get_nest_level(lowerdev) + 1;
|
|
|
|
vlan->mode = MACVLAN_MODE_VEPA;
|
|
if (data && data[IFLA_MACVLAN_MODE])
|
|
vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
|
|
|
|
if (data && data[IFLA_MACVLAN_FLAGS])
|
|
vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
|
|
|
|
if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
|
|
if (port->count) {
|
|
err = -EINVAL;
|
|
goto destroy_macvlan_port;
|
|
}
|
|
port->passthru = true;
|
|
eth_hw_addr_inherit(dev, lowerdev);
|
|
}
|
|
|
|
if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
|
|
if (vlan->mode != MACVLAN_MODE_SOURCE) {
|
|
err = -EINVAL;
|
|
goto destroy_macvlan_port;
|
|
}
|
|
macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
|
|
err = macvlan_changelink_sources(vlan, macmode, data);
|
|
if (err)
|
|
goto destroy_macvlan_port;
|
|
}
|
|
|
|
err = register_netdevice(dev);
|
|
if (err < 0)
|
|
goto destroy_macvlan_port;
|
|
|
|
dev->priv_flags |= IFF_MACVLAN;
|
|
err = netdev_upper_dev_link(lowerdev, dev);
|
|
if (err)
|
|
goto unregister_netdev;
|
|
|
|
list_add_tail_rcu(&vlan->list, &port->vlans);
|
|
netif_stacked_transfer_operstate(lowerdev, dev);
|
|
linkwatch_fire_event(dev);
|
|
|
|
return 0;
|
|
|
|
unregister_netdev:
|
|
unregister_netdevice(dev);
|
|
destroy_macvlan_port:
|
|
if (create)
|
|
macvlan_port_destroy(port->dev);
|
|
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);
|
|
}
|
|
|
|
void macvlan_dellink(struct net_device *dev, struct list_head *head)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
|
|
if (vlan->mode == MACVLAN_MODE_SOURCE)
|
|
macvlan_flush_sources(vlan->port, vlan);
|
|
list_del_rcu(&vlan->list);
|
|
unregister_netdevice_queue(dev, head);
|
|
netdev_upper_dev_unlink(vlan->lowerdev, 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);
|
|
enum macvlan_mode mode;
|
|
bool set_mode = false;
|
|
enum macvlan_macaddr_mode macmode;
|
|
int ret;
|
|
|
|
/* Validate mode, but don't set yet: setting flags may fail. */
|
|
if (data && data[IFLA_MACVLAN_MODE]) {
|
|
set_mode = true;
|
|
mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
|
|
/* Passthrough mode can't be set or cleared dynamically */
|
|
if ((mode == MACVLAN_MODE_PASSTHRU) !=
|
|
(vlan->mode == MACVLAN_MODE_PASSTHRU))
|
|
return -EINVAL;
|
|
if (vlan->mode == MACVLAN_MODE_SOURCE &&
|
|
vlan->mode != mode)
|
|
macvlan_flush_sources(vlan->port, vlan);
|
|
}
|
|
|
|
if (data && data[IFLA_MACVLAN_FLAGS]) {
|
|
__u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
|
|
bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
|
|
if (vlan->port->passthru && promisc) {
|
|
int err;
|
|
|
|
if (flags & MACVLAN_FLAG_NOPROMISC)
|
|
err = dev_set_promiscuity(vlan->lowerdev, -1);
|
|
else
|
|
err = dev_set_promiscuity(vlan->lowerdev, 1);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
vlan->flags = flags;
|
|
}
|
|
if (set_mode)
|
|
vlan->mode = mode;
|
|
if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
|
|
if (vlan->mode != MACVLAN_MODE_SOURCE)
|
|
return -EINVAL;
|
|
macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
|
|
ret = macvlan_changelink_sources(vlan, macmode, data);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan)
|
|
{
|
|
if (vlan->macaddr_count == 0)
|
|
return 0;
|
|
return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
|
|
+ vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN);
|
|
}
|
|
|
|
static size_t macvlan_get_size(const struct net_device *dev)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
|
|
return (0
|
|
+ nla_total_size(4) /* IFLA_MACVLAN_MODE */
|
|
+ nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
|
|
+ nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
|
|
+ macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */
|
|
);
|
|
}
|
|
|
|
static int macvlan_fill_info_macaddr(struct sk_buff *skb,
|
|
const struct macvlan_dev *vlan,
|
|
const int i)
|
|
{
|
|
struct hlist_head *h = &vlan->port->vlan_source_hash[i];
|
|
struct macvlan_source_entry *entry;
|
|
|
|
hlist_for_each_entry_rcu(entry, h, hlist) {
|
|
if (entry->vlan != vlan)
|
|
continue;
|
|
if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int macvlan_fill_info(struct sk_buff *skb,
|
|
const struct net_device *dev)
|
|
{
|
|
struct macvlan_dev *vlan = netdev_priv(dev);
|
|
int i;
|
|
struct nlattr *nest;
|
|
|
|
if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
|
|
goto nla_put_failure;
|
|
if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
|
|
goto nla_put_failure;
|
|
if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count))
|
|
goto nla_put_failure;
|
|
if (vlan->macaddr_count > 0) {
|
|
nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA);
|
|
if (nest == NULL)
|
|
goto nla_put_failure;
|
|
|
|
for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
|
|
if (macvlan_fill_info_macaddr(skb, vlan, i))
|
|
goto nla_put_failure;
|
|
}
|
|
nla_nest_end(skb, nest);
|
|
}
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
|
|
[IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
|
|
[IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
|
|
[IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 },
|
|
[IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
|
|
[IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED },
|
|
[IFLA_MACVLAN_MACADDR_COUNT] = { .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 net *macvlan_get_link_net(const struct net_device *dev)
|
|
{
|
|
return dev_net(macvlan_dev_real_dev(dev));
|
|
}
|
|
|
|
static struct rtnl_link_ops macvlan_link_ops = {
|
|
.kind = "macvlan",
|
|
.setup = macvlan_setup,
|
|
.newlink = macvlan_newlink,
|
|
.dellink = macvlan_dellink,
|
|
.get_link_net = macvlan_get_link_net,
|
|
};
|
|
|
|
static int macvlan_device_event(struct notifier_block *unused,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = netdev_notifier_info_to_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_rtnl(dev);
|
|
|
|
switch (event) {
|
|
case NETDEV_UP:
|
|
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->gso_max_size = dev->gso_max_size;
|
|
vlan->dev->gso_max_segs = dev->gso_max_segs;
|
|
netdev_update_features(vlan->dev);
|
|
}
|
|
break;
|
|
case NETDEV_CHANGEMTU:
|
|
list_for_each_entry(vlan, &port->vlans, list) {
|
|
if (vlan->dev->mtu <= dev->mtu)
|
|
continue;
|
|
dev_set_mtu(vlan->dev, dev->mtu);
|
|
}
|
|
break;
|
|
case NETDEV_CHANGEADDR:
|
|
if (!port->passthru)
|
|
return NOTIFY_DONE;
|
|
|
|
vlan = list_first_entry_or_null(&port->vlans,
|
|
struct macvlan_dev,
|
|
list);
|
|
|
|
if (macvlan_sync_address(vlan->dev, dev->dev_addr))
|
|
return NOTIFY_BAD;
|
|
|
|
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);
|
|
break;
|
|
case NETDEV_PRE_TYPE_CHANGE:
|
|
/* Forbid underlaying device to change its type. */
|
|
return NOTIFY_BAD;
|
|
|
|
case NETDEV_NOTIFY_PEERS:
|
|
case NETDEV_BONDING_FAILOVER:
|
|
case NETDEV_RESEND_IGMP:
|
|
/* Propagate to all vlans */
|
|
list_for_each_entry(vlan, &port->vlans, list)
|
|
call_netdevice_notifiers(event, vlan->dev);
|
|
}
|
|
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");
|