From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/net/macvlan.c | 1606 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1606 insertions(+) create mode 100644 kernel/drivers/net/macvlan.c (limited to 'kernel/drivers/net/macvlan.c') diff --git a/kernel/drivers/net/macvlan.c b/kernel/drivers/net/macvlan.c new file mode 100644 index 000000000..9f59f17dc --- /dev/null +++ b/kernel/drivers/net/macvlan.c @@ -0,0 +1,1606 @@ +/* + * Copyright (c) 2007 Patrick McHardy + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * The code this is based on carried the following copyright notice: + * --- + * (C) Copyright 2001-2006 + * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com + * Re-worked by Ben Greear + * --- + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MACVLAN_HASH_BITS 8 +#define MACVLAN_HASH_SIZE (1<cb[0])) + +static void macvlan_port_destroy(struct net_device *dev); + +/* Hash Ethernet address */ +static u32 macvlan_eth_hash(const unsigned char *addr) +{ + u64 value = get_unaligned((u64 *)addr); + + /* only want 6 bytes */ +#ifdef __BIG_ENDIAN + value >>= 16; +#else + value <<= 16; +#endif + return hash_64(value, MACVLAN_HASH_BITS); +} + +static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) +{ + return rcu_dereference(dev->rx_handler_data); +} + +static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) +{ + return rtnl_dereference(dev->rx_handler_data); +} + +#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) + +static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, + const unsigned char *addr) +{ + struct macvlan_dev *vlan; + u32 idx = macvlan_eth_hash(addr); + + hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) { + if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) + return vlan; + } + return NULL; +} + +static struct macvlan_source_entry *macvlan_hash_lookup_source( + const struct macvlan_dev *vlan, + const unsigned char *addr) +{ + struct macvlan_source_entry *entry; + u32 idx = macvlan_eth_hash(addr); + struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; + + hlist_for_each_entry_rcu(entry, h, hlist) { + if (ether_addr_equal_64bits(entry->addr, addr) && + entry->vlan == vlan) + return entry; + } + return NULL; +} + +static int macvlan_hash_add_source(struct macvlan_dev *vlan, + const unsigned char *addr) +{ + struct macvlan_port *port = vlan->port; + struct macvlan_source_entry *entry; + struct hlist_head *h; + + entry = macvlan_hash_lookup_source(vlan, addr); + if (entry) + return 0; + + entry = kmalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return -ENOMEM; + + ether_addr_copy(entry->addr, addr); + entry->vlan = vlan; + h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; + hlist_add_head_rcu(&entry->hlist, h); + vlan->macaddr_count++; + + return 0; +} + +static void macvlan_hash_add(struct macvlan_dev *vlan) +{ + struct macvlan_port *port = vlan->port; + const unsigned char *addr = vlan->dev->dev_addr; + u32 idx = macvlan_eth_hash(addr); + + hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); +} + +static void macvlan_hash_del_source(struct macvlan_source_entry *entry) +{ + hlist_del_rcu(&entry->hlist); + kfree_rcu(entry, rcu); +} + +static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) +{ + hlist_del_rcu(&vlan->hlist); + if (sync) + synchronize_rcu(); +} + +static void macvlan_hash_change_addr(struct macvlan_dev *vlan, + const unsigned char *addr) +{ + macvlan_hash_del(vlan, true); + /* Now that we are unhashed it is safe to change the device + * address without confusing packet delivery. + */ + memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); + macvlan_hash_add(vlan); +} + +static int macvlan_addr_busy(const struct macvlan_port *port, + const unsigned char *addr) +{ + /* Test to see if the specified multicast address is + * currently in use by the underlying device or + * another macvlan. + */ + if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) + return 1; + + if (macvlan_hash_lookup(port, addr)) + return 1; + + return 0; +} + + +static int macvlan_broadcast_one(struct sk_buff *skb, + const struct macvlan_dev *vlan, + const struct ethhdr *eth, bool local) +{ + struct net_device *dev = vlan->dev; + + if (local) + return __dev_forward_skb(dev, skb); + + skb->dev = dev; + if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) + skb->pkt_type = PACKET_BROADCAST; + else + skb->pkt_type = PACKET_MULTICAST; + + return 0; +} + +static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) +{ + return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); +} + + +static unsigned int mc_hash(const struct macvlan_dev *vlan, + const unsigned char *addr) +{ + u32 val = __get_unaligned_cpu32(addr + 2); + + val ^= macvlan_hash_mix(vlan); + return hash_32(val, MACVLAN_MC_FILTER_BITS); +} + +static void macvlan_broadcast(struct sk_buff *skb, + const struct macvlan_port *port, + struct net_device *src, + enum macvlan_mode mode) +{ + const struct ethhdr *eth = eth_hdr(skb); + const struct macvlan_dev *vlan; + struct sk_buff *nskb; + unsigned int i; + int err; + unsigned int hash; + + if (skb->protocol == htons(ETH_P_PAUSE)) + return; + + for (i = 0; i < MACVLAN_HASH_SIZE; i++) { + hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { + if (vlan->dev == src || !(vlan->mode & mode)) + continue; + + hash = mc_hash(vlan, eth->h_dest); + if (!test_bit(hash, vlan->mc_filter)) + continue; + + err = NET_RX_DROP; + nskb = skb_clone(skb, GFP_ATOMIC); + if (likely(nskb)) + err = macvlan_broadcast_one( + nskb, vlan, eth, + mode == MACVLAN_MODE_BRIDGE) ?: + netif_rx_ni(nskb); + macvlan_count_rx(vlan, skb->len + ETH_HLEN, + err == NET_RX_SUCCESS, true); + } + } +} + +static void macvlan_process_broadcast(struct work_struct *w) +{ + struct macvlan_port *port = container_of(w, struct macvlan_port, + bc_work); + struct sk_buff *skb; + struct sk_buff_head list; + + __skb_queue_head_init(&list); + + spin_lock_bh(&port->bc_queue.lock); + skb_queue_splice_tail_init(&port->bc_queue, &list); + spin_unlock_bh(&port->bc_queue.lock); + + while ((skb = __skb_dequeue(&list))) { + const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; + + rcu_read_lock(); + + if (!src) + /* frame comes from an external address */ + macvlan_broadcast(skb, port, NULL, + MACVLAN_MODE_PRIVATE | + MACVLAN_MODE_VEPA | + MACVLAN_MODE_PASSTHRU| + MACVLAN_MODE_BRIDGE); + else if (src->mode == MACVLAN_MODE_VEPA) + /* flood to everyone except source */ + macvlan_broadcast(skb, port, src->dev, + MACVLAN_MODE_VEPA | + MACVLAN_MODE_BRIDGE); + else + /* + * flood only to VEPA ports, bridge ports + * already saw the frame on the way out. + */ + macvlan_broadcast(skb, port, src->dev, + MACVLAN_MODE_VEPA); + + rcu_read_unlock(); + + kfree_skb(skb); + } +} + +static void macvlan_broadcast_enqueue(struct macvlan_port *port, + struct sk_buff *skb) +{ + struct sk_buff *nskb; + int err = -ENOMEM; + + nskb = skb_clone(skb, GFP_ATOMIC); + if (!nskb) + goto err; + + spin_lock(&port->bc_queue.lock); + if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { + __skb_queue_tail(&port->bc_queue, nskb); + err = 0; + } + spin_unlock(&port->bc_queue.lock); + + if (err) + goto free_nskb; + + schedule_work(&port->bc_work); + return; + +free_nskb: + kfree_skb(nskb); +err: + atomic_long_inc(&skb->dev->rx_dropped); +} + +static void macvlan_flush_sources(struct macvlan_port *port, + struct macvlan_dev *vlan) +{ + int i; + + for (i = 0; i < MACVLAN_HASH_SIZE; i++) { + struct hlist_node *h, *n; + + hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { + struct macvlan_source_entry *entry; + + entry = hlist_entry(h, struct macvlan_source_entry, + hlist); + if (entry->vlan == vlan) + macvlan_hash_del_source(entry); + } + } + vlan->macaddr_count = 0; +} + +static void macvlan_forward_source_one(struct sk_buff *skb, + struct macvlan_dev *vlan) +{ + struct sk_buff *nskb; + struct net_device *dev; + int len; + int ret; + + dev = vlan->dev; + if (unlikely(!(dev->flags & IFF_UP))) + return; + + nskb = skb_clone(skb, GFP_ATOMIC); + if (!nskb) + return; + + len = nskb->len + ETH_HLEN; + nskb->dev = dev; + nskb->pkt_type = PACKET_HOST; + + ret = netif_rx(nskb); + macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); +} + +static void macvlan_forward_source(struct sk_buff *skb, + struct macvlan_port *port, + const unsigned char *addr) +{ + struct macvlan_source_entry *entry; + u32 idx = macvlan_eth_hash(addr); + struct hlist_head *h = &port->vlan_source_hash[idx]; + + hlist_for_each_entry_rcu(entry, h, hlist) { + if (ether_addr_equal_64bits(entry->addr, addr)) + if (entry->vlan->dev->flags & IFF_UP) + macvlan_forward_source_one(skb, entry->vlan); + } +} + +/* called under rcu_read_lock() from netif_receive_skb */ +static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) +{ + struct macvlan_port *port; + struct sk_buff *skb = *pskb; + const struct ethhdr *eth = eth_hdr(skb); + const struct macvlan_dev *vlan; + const struct macvlan_dev *src; + struct net_device *dev; + unsigned int len = 0; + int ret; + rx_handler_result_t handle_res; + + port = macvlan_port_get_rcu(skb->dev); + if (is_multicast_ether_addr(eth->h_dest)) { + skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); + if (!skb) + return RX_HANDLER_CONSUMED; + eth = eth_hdr(skb); + macvlan_forward_source(skb, port, eth->h_source); + src = macvlan_hash_lookup(port, eth->h_source); + if (src && src->mode != MACVLAN_MODE_VEPA && + src->mode != MACVLAN_MODE_BRIDGE) { + /* forward to original port. */ + vlan = src; + ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: + netif_rx(skb); + handle_res = RX_HANDLER_CONSUMED; + goto out; + } + + MACVLAN_SKB_CB(skb)->src = src; + macvlan_broadcast_enqueue(port, skb); + + return RX_HANDLER_PASS; + } + + macvlan_forward_source(skb, port, eth->h_source); + if (port->passthru) + vlan = list_first_or_null_rcu(&port->vlans, + struct macvlan_dev, list); + else + vlan = macvlan_hash_lookup(port, eth->h_dest); + if (vlan == NULL) + return RX_HANDLER_PASS; + + dev = vlan->dev; + if (unlikely(!(dev->flags & IFF_UP))) { + kfree_skb(skb); + return RX_HANDLER_CONSUMED; + } + len = skb->len + ETH_HLEN; + skb = skb_share_check(skb, GFP_ATOMIC); + if (!skb) { + ret = NET_RX_DROP; + handle_res = RX_HANDLER_CONSUMED; + goto out; + } + + 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); + 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: + 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_set_mac_lists(struct net_device *dev) +{ + struct macvlan_dev *vlan = netdev_priv(dev); + + if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { + bitmap_fill(vlan->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(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); + } + dev_uc_sync(vlan->lowerdev, dev); + dev_mc_sync(vlan->lowerdev, dev); +} + +static int macvlan_change_mtu(struct net_device *dev, int new_mtu) +{ + struct macvlan_dev *vlan = netdev_priv(dev); + + if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) + return -EINVAL; + dev->mtu = new_mtu; + return 0; +} + +/* + * macvlan network devices have devices nesting below it and are a special + * "super class" of normal network devices; split their locks off into a + * separate class since they always nest. + */ +static struct lock_class_key macvlan_netdev_xmit_lock_key; +static struct lock_class_key macvlan_netdev_addr_lock_key; + +#define ALWAYS_ON_FEATURES \ + (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \ + NETIF_F_GSO_ROBUST) + +#define MACVLAN_FEATURES \ + (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ + NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_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_one(struct net_device *dev, + struct netdev_queue *txq, + void *_unused) +{ + lockdep_set_class(&txq->_xmit_lock, + &macvlan_netdev_xmit_lock_key); +} + +static void macvlan_set_lockdep_class(struct net_device *dev) +{ + lockdep_set_class_and_subclass(&dev->addr_list_lock, + &macvlan_netdev_addr_lock_key, + macvlan_get_nest_level(dev)); + netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); +} + +static int macvlan_init(struct net_device *dev) +{ + struct macvlan_dev *vlan = netdev_priv(dev); + const struct net_device *lowerdev = vlan->lowerdev; + + dev->state = (dev->state & ~MACVLAN_STATE_MASK) | + (lowerdev->state & MACVLAN_STATE_MASK); + dev->features = lowerdev->features & MACVLAN_FEATURES; + dev->features |= 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->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; + + 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_settings(struct net_device *dev, + struct ethtool_cmd *cmd) +{ + const struct macvlan_dev *vlan = netdev_priv(dev); + + return __ethtool_get_settings(vlan->lowerdev, cmd); +} + +static 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_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_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, +}; + +void macvlan_common_setup(struct net_device *dev) +{ + ether_setup(dev); + + 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->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; + + 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_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_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; + + 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; + + if (!tb[IFLA_ADDRESS]) + eth_hw_addr_random(dev); + + if (!macvlan_port_exists(lowerdev)) { + err = macvlan_port_create(lowerdev); + if (err < 0) + return err; + } + port = macvlan_port_get_rtnl(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->set_features = MACVLAN_FEATURES; + vlan->nest_level = dev_get_nest_level(lowerdev, netif_is_macvlan) + 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) + return -EINVAL; + port->passthru = true; + eth_hw_addr_inherit(dev, lowerdev); + } + + if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { + if (vlan->mode != MACVLAN_MODE_SOURCE) + return -EINVAL; + macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); + err = macvlan_changelink_sources(vlan, macmode, data); + if (err) + return err; + } + + port->count += 1; + err = register_netdevice(dev); + if (err < 0) + goto destroy_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); + + return 0; + +unregister_netdev: + unregister_netdevice(dev); +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); +} + +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_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; + 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 "); +MODULE_DESCRIPTION("Driver for MAC address based VLANs"); +MODULE_ALIAS_RTNL_LINK("macvlan"); -- cgit 1.2.3-korg