--- /dev/null
+/* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
+ *
+ * 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.
+ *
+ */
+
+#include "ipvlan.h"
+
+static u32 ipvlan_jhash_secret;
+
+void ipvlan_init_secret(void)
+{
+ net_get_random_once(&ipvlan_jhash_secret, sizeof(ipvlan_jhash_secret));
+}
+
+static void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
+ unsigned int len, bool success, bool mcast)
+{
+ if (!ipvlan)
+ return;
+
+ if (likely(success)) {
+ struct ipvl_pcpu_stats *pcptr;
+
+ pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
+ u64_stats_update_begin(&pcptr->syncp);
+ pcptr->rx_pkts++;
+ pcptr->rx_bytes += len;
+ if (mcast)
+ pcptr->rx_mcast++;
+ u64_stats_update_end(&pcptr->syncp);
+ } else {
+ this_cpu_inc(ipvlan->pcpu_stats->rx_errs);
+ }
+}
+
+static u8 ipvlan_get_v6_hash(const void *iaddr)
+{
+ const struct in6_addr *ip6_addr = iaddr;
+
+ return __ipv6_addr_jhash(ip6_addr, ipvlan_jhash_secret) &
+ IPVLAN_HASH_MASK;
+}
+
+static u8 ipvlan_get_v4_hash(const void *iaddr)
+{
+ const struct in_addr *ip4_addr = iaddr;
+
+ return jhash_1word(ip4_addr->s_addr, ipvlan_jhash_secret) &
+ IPVLAN_HASH_MASK;
+}
+
+struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port,
+ const void *iaddr, bool is_v6)
+{
+ struct ipvl_addr *addr;
+ u8 hash;
+
+ hash = is_v6 ? ipvlan_get_v6_hash(iaddr) :
+ ipvlan_get_v4_hash(iaddr);
+ hlist_for_each_entry_rcu(addr, &port->hlhead[hash], hlnode) {
+ if (is_v6 && addr->atype == IPVL_IPV6 &&
+ ipv6_addr_equal(&addr->ip6addr, iaddr))
+ return addr;
+ else if (!is_v6 && addr->atype == IPVL_IPV4 &&
+ addr->ip4addr.s_addr ==
+ ((struct in_addr *)iaddr)->s_addr)
+ return addr;
+ }
+ return NULL;
+}
+
+void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr)
+{
+ struct ipvl_port *port = ipvlan->port;
+ u8 hash;
+
+ hash = (addr->atype == IPVL_IPV6) ?
+ ipvlan_get_v6_hash(&addr->ip6addr) :
+ ipvlan_get_v4_hash(&addr->ip4addr);
+ hlist_add_head_rcu(&addr->hlnode, &port->hlhead[hash]);
+}
+
+void ipvlan_ht_addr_del(struct ipvl_addr *addr, bool sync)
+{
+ hlist_del_rcu(&addr->hlnode);
+ if (sync)
+ synchronize_rcu();
+}
+
+bool ipvlan_addr_busy(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
+{
+ struct ipvl_port *port = ipvlan->port;
+ struct ipvl_addr *addr;
+
+ list_for_each_entry(addr, &ipvlan->addrs, anode) {
+ if ((is_v6 && addr->atype == IPVL_IPV6 &&
+ ipv6_addr_equal(&addr->ip6addr, iaddr)) ||
+ (!is_v6 && addr->atype == IPVL_IPV4 &&
+ addr->ip4addr.s_addr == ((struct in_addr *)iaddr)->s_addr))
+ return true;
+ }
+
+ if (ipvlan_ht_addr_lookup(port, iaddr, is_v6))
+ return true;
+
+ return false;
+}
+
+static void *ipvlan_get_L3_hdr(struct sk_buff *skb, int *type)
+{
+ void *lyr3h = NULL;
+
+ switch (skb->protocol) {
+ case htons(ETH_P_ARP): {
+ struct arphdr *arph;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(*arph))))
+ return NULL;
+
+ arph = arp_hdr(skb);
+ *type = IPVL_ARP;
+ lyr3h = arph;
+ break;
+ }
+ case htons(ETH_P_IP): {
+ u32 pktlen;
+ struct iphdr *ip4h;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(*ip4h))))
+ return NULL;
+
+ ip4h = ip_hdr(skb);
+ pktlen = ntohs(ip4h->tot_len);
+ if (ip4h->ihl < 5 || ip4h->version != 4)
+ return NULL;
+ if (skb->len < pktlen || pktlen < (ip4h->ihl * 4))
+ return NULL;
+
+ *type = IPVL_IPV4;
+ lyr3h = ip4h;
+ break;
+ }
+ case htons(ETH_P_IPV6): {
+ struct ipv6hdr *ip6h;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(*ip6h))))
+ return NULL;
+
+ ip6h = ipv6_hdr(skb);
+ if (ip6h->version != 6)
+ return NULL;
+
+ *type = IPVL_IPV6;
+ lyr3h = ip6h;
+ /* Only Neighbour Solicitation pkts need different treatment */
+ if (ipv6_addr_any(&ip6h->saddr) &&
+ ip6h->nexthdr == NEXTHDR_ICMP) {
+ *type = IPVL_ICMPV6;
+ lyr3h = ip6h + 1;
+ }
+ break;
+ }
+ default:
+ return NULL;
+ }
+
+ return lyr3h;
+}
+
+unsigned int ipvlan_mac_hash(const unsigned char *addr)
+{
+ u32 hash = jhash_1word(__get_unaligned_cpu32(addr+2),
+ ipvlan_jhash_secret);
+
+ return hash & IPVLAN_MAC_FILTER_MASK;
+}
+
+static void ipvlan_multicast_frame(struct ipvl_port *port, struct sk_buff *skb,
+ const struct ipvl_dev *in_dev, bool local)
+{
+ struct ethhdr *eth = eth_hdr(skb);
+ struct ipvl_dev *ipvlan;
+ struct sk_buff *nskb;
+ unsigned int len;
+ unsigned int mac_hash;
+ int ret;
+
+ if (skb->protocol == htons(ETH_P_PAUSE))
+ return;
+
+ list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
+ if (local && (ipvlan == in_dev))
+ continue;
+
+ mac_hash = ipvlan_mac_hash(eth->h_dest);
+ if (!test_bit(mac_hash, ipvlan->mac_filters))
+ continue;
+
+ ret = NET_RX_DROP;
+ len = skb->len + ETH_HLEN;
+ nskb = skb_clone(skb, GFP_ATOMIC);
+ if (!nskb)
+ goto mcast_acct;
+
+ if (ether_addr_equal(eth->h_dest, ipvlan->phy_dev->broadcast))
+ nskb->pkt_type = PACKET_BROADCAST;
+ else
+ nskb->pkt_type = PACKET_MULTICAST;
+
+ nskb->dev = ipvlan->dev;
+ if (local)
+ ret = dev_forward_skb(ipvlan->dev, nskb);
+ else
+ ret = netif_rx(nskb);
+mcast_acct:
+ ipvlan_count_rx(ipvlan, len, ret == NET_RX_SUCCESS, true);
+ }
+
+ /* Locally generated? ...Forward a copy to the main-device as
+ * well. On the RX side we'll ignore it (wont give it to any
+ * of the virtual devices.
+ */
+ if (local) {
+ nskb = skb_clone(skb, GFP_ATOMIC);
+ if (nskb) {
+ if (ether_addr_equal(eth->h_dest, port->dev->broadcast))
+ nskb->pkt_type = PACKET_BROADCAST;
+ else
+ nskb->pkt_type = PACKET_MULTICAST;
+
+ dev_forward_skb(port->dev, nskb);
+ }
+ }
+}
+
+static int ipvlan_rcv_frame(struct ipvl_addr *addr, struct sk_buff *skb,
+ bool local)
+{
+ struct ipvl_dev *ipvlan = addr->master;
+ struct net_device *dev = ipvlan->dev;
+ unsigned int len;
+ rx_handler_result_t ret = RX_HANDLER_CONSUMED;
+ bool success = false;
+
+ len = skb->len + ETH_HLEN;
+ if (unlikely(!(dev->flags & IFF_UP))) {
+ kfree_skb(skb);
+ goto out;
+ }
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb)
+ goto out;
+
+ skb->dev = dev;
+ skb->pkt_type = PACKET_HOST;
+
+ if (local) {
+ if (dev_forward_skb(ipvlan->dev, skb) == NET_RX_SUCCESS)
+ success = true;
+ } else {
+ ret = RX_HANDLER_ANOTHER;
+ success = true;
+ }
+
+out:
+ ipvlan_count_rx(ipvlan, len, success, false);
+ return ret;
+}
+
+static struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port,
+ void *lyr3h, int addr_type,
+ bool use_dest)
+{
+ struct ipvl_addr *addr = NULL;
+
+ if (addr_type == IPVL_IPV6) {
+ struct ipv6hdr *ip6h;
+ struct in6_addr *i6addr;
+
+ ip6h = (struct ipv6hdr *)lyr3h;
+ i6addr = use_dest ? &ip6h->daddr : &ip6h->saddr;
+ addr = ipvlan_ht_addr_lookup(port, i6addr, true);
+ } else if (addr_type == IPVL_ICMPV6) {
+ struct nd_msg *ndmh;
+ struct in6_addr *i6addr;
+
+ /* Make sure that the NeighborSolicitation ICMPv6 packets
+ * are handled to avoid DAD issue.
+ */
+ ndmh = (struct nd_msg *)lyr3h;
+ if (ndmh->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) {
+ i6addr = &ndmh->target;
+ addr = ipvlan_ht_addr_lookup(port, i6addr, true);
+ }
+ } else if (addr_type == IPVL_IPV4) {
+ struct iphdr *ip4h;
+ __be32 *i4addr;
+
+ ip4h = (struct iphdr *)lyr3h;
+ i4addr = use_dest ? &ip4h->daddr : &ip4h->saddr;
+ addr = ipvlan_ht_addr_lookup(port, i4addr, false);
+ } else if (addr_type == IPVL_ARP) {
+ struct arphdr *arph;
+ unsigned char *arp_ptr;
+ __be32 dip;
+
+ arph = (struct arphdr *)lyr3h;
+ arp_ptr = (unsigned char *)(arph + 1);
+ if (use_dest)
+ arp_ptr += (2 * port->dev->addr_len) + 4;
+ else
+ arp_ptr += port->dev->addr_len;
+
+ memcpy(&dip, arp_ptr, 4);
+ addr = ipvlan_ht_addr_lookup(port, &dip, false);
+ }
+
+ return addr;
+}
+
+static int ipvlan_process_v4_outbound(struct sk_buff *skb)
+{
+ const struct iphdr *ip4h = ip_hdr(skb);
+ struct net_device *dev = skb->dev;
+ struct rtable *rt;
+ int err, ret = NET_XMIT_DROP;
+ struct flowi4 fl4 = {
+ .flowi4_oif = dev->iflink,
+ .flowi4_tos = RT_TOS(ip4h->tos),
+ .flowi4_flags = FLOWI_FLAG_ANYSRC,
+ .daddr = ip4h->daddr,
+ .saddr = ip4h->saddr,
+ };
+
+ rt = ip_route_output_flow(dev_net(dev), &fl4, NULL);
+ if (IS_ERR(rt))
+ goto err;
+
+ if (rt->rt_type != RTN_UNICAST && rt->rt_type != RTN_LOCAL) {
+ ip_rt_put(rt);
+ goto err;
+ }
+ skb_dst_drop(skb);
+ skb_dst_set(skb, &rt->dst);
+ err = ip_local_out(skb);
+ if (unlikely(net_xmit_eval(err)))
+ dev->stats.tx_errors++;
+ else
+ ret = NET_XMIT_SUCCESS;
+ goto out;
+err:
+ dev->stats.tx_errors++;
+ kfree_skb(skb);
+out:
+ return ret;
+}
+
+static int ipvlan_process_v6_outbound(struct sk_buff *skb)
+{
+ const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+ struct net_device *dev = skb->dev;
+ struct dst_entry *dst;
+ int err, ret = NET_XMIT_DROP;
+ struct flowi6 fl6 = {
+ .flowi6_iif = skb->dev->ifindex,
+ .daddr = ip6h->daddr,
+ .saddr = ip6h->saddr,
+ .flowi6_flags = FLOWI_FLAG_ANYSRC,
+ .flowlabel = ip6_flowinfo(ip6h),
+ .flowi6_mark = skb->mark,
+ .flowi6_proto = ip6h->nexthdr,
+ };
+
+ dst = ip6_route_output(dev_net(dev), NULL, &fl6);
+ if (IS_ERR(dst))
+ goto err;
+
+ skb_dst_drop(skb);
+ skb_dst_set(skb, dst);
+ err = ip6_local_out(skb);
+ if (unlikely(net_xmit_eval(err)))
+ dev->stats.tx_errors++;
+ else
+ ret = NET_XMIT_SUCCESS;
+ goto out;
+err:
+ dev->stats.tx_errors++;
+ kfree_skb(skb);
+out:
+ return ret;
+}
+
+static int ipvlan_process_outbound(struct sk_buff *skb,
+ const struct ipvl_dev *ipvlan)
+{
+ struct ethhdr *ethh = eth_hdr(skb);
+ int ret = NET_XMIT_DROP;
+
+ /* In this mode we dont care about multicast and broadcast traffic */
+ if (is_multicast_ether_addr(ethh->h_dest)) {
+ pr_warn_ratelimited("Dropped {multi|broad}cast of type= [%x]\n",
+ ntohs(skb->protocol));
+ kfree_skb(skb);
+ goto out;
+ }
+
+ /* The ipvlan is a pseudo-L2 device, so the packets that we receive
+ * will have L2; which need to discarded and processed further
+ * in the net-ns of the main-device.
+ */
+ if (skb_mac_header_was_set(skb)) {
+ skb_pull(skb, sizeof(*ethh));
+ skb->mac_header = (typeof(skb->mac_header))~0U;
+ skb_reset_network_header(skb);
+ }
+
+ if (skb->protocol == htons(ETH_P_IPV6))
+ ret = ipvlan_process_v6_outbound(skb);
+ else if (skb->protocol == htons(ETH_P_IP))
+ ret = ipvlan_process_v4_outbound(skb);
+ else {
+ pr_warn_ratelimited("Dropped outbound packet type=%x\n",
+ ntohs(skb->protocol));
+ kfree_skb(skb);
+ }
+out:
+ return ret;
+}
+
+static int ipvlan_xmit_mode_l3(struct sk_buff *skb, struct net_device *dev)
+{
+ const struct ipvl_dev *ipvlan = netdev_priv(dev);
+ void *lyr3h;
+ struct ipvl_addr *addr;
+ int addr_type;
+
+ lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);
+ if (!lyr3h)
+ goto out;
+
+ addr = ipvlan_addr_lookup(ipvlan->port, lyr3h, addr_type, true);
+ if (addr)
+ return ipvlan_rcv_frame(addr, skb, true);
+
+out:
+ skb->dev = ipvlan->phy_dev;
+ return ipvlan_process_outbound(skb, ipvlan);
+}
+
+static int ipvlan_xmit_mode_l2(struct sk_buff *skb, struct net_device *dev)
+{
+ const struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct ethhdr *eth = eth_hdr(skb);
+ struct ipvl_addr *addr;
+ void *lyr3h;
+ int addr_type;
+
+ if (ether_addr_equal(eth->h_dest, eth->h_source)) {
+ lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);
+ if (lyr3h) {
+ addr = ipvlan_addr_lookup(ipvlan->port, lyr3h, addr_type, true);
+ if (addr)
+ return ipvlan_rcv_frame(addr, skb, true);
+ }
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb)
+ return NET_XMIT_DROP;
+
+ /* Packet definitely does not belong to any of the
+ * virtual devices, but the dest is local. So forward
+ * the skb for the main-dev. At the RX side we just return
+ * RX_PASS for it to be processed further on the stack.
+ */
+ return dev_forward_skb(ipvlan->phy_dev, skb);
+
+ } else if (is_multicast_ether_addr(eth->h_dest)) {
+ u8 ip_summed = skb->ip_summed;
+
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ ipvlan_multicast_frame(ipvlan->port, skb, ipvlan, true);
+ skb->ip_summed = ip_summed;
+ }
+
+ skb->dev = ipvlan->phy_dev;
+ return dev_queue_xmit(skb);
+}
+
+int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct ipvl_port *port = ipvlan_port_get_rcu(ipvlan->phy_dev);
+
+ if (!port)
+ goto out;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(struct ethhdr))))
+ goto out;
+
+ switch(port->mode) {
+ case IPVLAN_MODE_L2:
+ return ipvlan_xmit_mode_l2(skb, dev);
+ case IPVLAN_MODE_L3:
+ return ipvlan_xmit_mode_l3(skb, dev);
+ }
+
+ /* Should not reach here */
+ WARN_ONCE(true, "ipvlan_queue_xmit() called for mode = [%hx]\n",
+ port->mode);
+out:
+ kfree_skb(skb);
+ return NET_XMIT_DROP;
+}
+
+static bool ipvlan_external_frame(struct sk_buff *skb, struct ipvl_port *port)
+{
+ struct ethhdr *eth = eth_hdr(skb);
+ struct ipvl_addr *addr;
+ void *lyr3h;
+ int addr_type;
+
+ if (ether_addr_equal(eth->h_source, skb->dev->dev_addr)) {
+ lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);
+ if (!lyr3h)
+ return true;
+
+ addr = ipvlan_addr_lookup(port, lyr3h, addr_type, false);
+ if (addr)
+ return false;
+ }
+
+ return true;
+}
+
+static rx_handler_result_t ipvlan_handle_mode_l3(struct sk_buff **pskb,
+ struct ipvl_port *port)
+{
+ void *lyr3h;
+ int addr_type;
+ struct ipvl_addr *addr;
+ struct sk_buff *skb = *pskb;
+ rx_handler_result_t ret = RX_HANDLER_PASS;
+
+ lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);
+ if (!lyr3h)
+ goto out;
+
+ addr = ipvlan_addr_lookup(port, lyr3h, addr_type, true);
+ if (addr)
+ ret = ipvlan_rcv_frame(addr, skb, false);
+
+out:
+ return ret;
+}
+
+static rx_handler_result_t ipvlan_handle_mode_l2(struct sk_buff **pskb,
+ struct ipvl_port *port)
+{
+ struct sk_buff *skb = *pskb;
+ struct ethhdr *eth = eth_hdr(skb);
+ rx_handler_result_t ret = RX_HANDLER_PASS;
+ void *lyr3h;
+ int addr_type;
+
+ if (is_multicast_ether_addr(eth->h_dest)) {
+ if (ipvlan_external_frame(skb, port))
+ ipvlan_multicast_frame(port, skb, NULL, false);
+ } else {
+ struct ipvl_addr *addr;
+
+ lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);
+ if (!lyr3h)
+ return ret;
+
+ addr = ipvlan_addr_lookup(port, lyr3h, addr_type, true);
+ if (addr)
+ ret = ipvlan_rcv_frame(addr, skb, false);
+ }
+
+ return ret;
+}
+
+rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb)
+{
+ struct sk_buff *skb = *pskb;
+ struct ipvl_port *port = ipvlan_port_get_rcu(skb->dev);
+
+ if (!port)
+ return RX_HANDLER_PASS;
+
+ switch (port->mode) {
+ case IPVLAN_MODE_L2:
+ return ipvlan_handle_mode_l2(pskb, port);
+ case IPVLAN_MODE_L3:
+ return ipvlan_handle_mode_l3(pskb, port);
+ }
+
+ /* Should not reach here */
+ WARN_ONCE(true, "ipvlan_handle_frame() called for mode = [%hx]\n",
+ port->mode);
+ kfree_skb(skb);
+ return NET_RX_DROP;
+}
--- /dev/null
+/* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
+ *
+ * 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.
+ *
+ */
+
+#include "ipvlan.h"
+
+void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
+{
+ ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj;
+}
+
+void ipvlan_set_port_mode(struct ipvl_port *port, u32 nval)
+{
+ struct ipvl_dev *ipvlan;
+
+ if (port->mode != nval) {
+ list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
+ if (nval == IPVLAN_MODE_L3)
+ ipvlan->dev->flags |= IFF_NOARP;
+ else
+ ipvlan->dev->flags &= ~IFF_NOARP;
+ }
+ port->mode = nval;
+ }
+}
+
+static int ipvlan_port_create(struct net_device *dev)
+{
+ struct ipvl_port *port;
+ int err, idx;
+
+ if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) {
+ netdev_err(dev, "Master is either lo or non-ether device\n");
+ return -EINVAL;
+ }
+ port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL);
+ if (!port)
+ return -ENOMEM;
+
+ port->dev = dev;
+ port->mode = IPVLAN_MODE_L3;
+ INIT_LIST_HEAD(&port->ipvlans);
+ for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++)
+ INIT_HLIST_HEAD(&port->hlhead[idx]);
+
+ err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
+ if (err)
+ goto err;
+
+ dev->priv_flags |= IFF_IPVLAN_MASTER;
+ return 0;
+
+err:
+ kfree_rcu(port, rcu);
+ return err;
+}
+
+static void ipvlan_port_destroy(struct net_device *dev)
+{
+ struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
+
+ dev->priv_flags &= ~IFF_IPVLAN_MASTER;
+ netdev_rx_handler_unregister(dev);
+ kfree_rcu(port, rcu);
+}
+
+/* ipvlan 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 ipvlan_netdev_xmit_lock_key;
+static struct lock_class_key ipvlan_netdev_addr_lock_key;
+
+#define IPVLAN_FEATURES \
+ (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
+ NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
+ NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
+ NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
+
+#define IPVLAN_STATE_MASK \
+ ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
+
+static void ipvlan_set_lockdep_class_one(struct net_device *dev,
+ struct netdev_queue *txq,
+ void *_unused)
+{
+ lockdep_set_class(&txq->_xmit_lock, &ipvlan_netdev_xmit_lock_key);
+}
+
+static void ipvlan_set_lockdep_class(struct net_device *dev)
+{
+ lockdep_set_class(&dev->addr_list_lock, &ipvlan_netdev_addr_lock_key);
+ netdev_for_each_tx_queue(dev, ipvlan_set_lockdep_class_one, NULL);
+}
+
+static int ipvlan_init(struct net_device *dev)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ const struct net_device *phy_dev = ipvlan->phy_dev;
+
+ dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
+ (phy_dev->state & IPVLAN_STATE_MASK);
+ dev->features = phy_dev->features & IPVLAN_FEATURES;
+ dev->features |= NETIF_F_LLTX;
+ dev->gso_max_size = phy_dev->gso_max_size;
+ dev->iflink = phy_dev->ifindex;
+ dev->hard_header_len = phy_dev->hard_header_len;
+
+ ipvlan_set_lockdep_class(dev);
+
+ ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats);
+ if (!ipvlan->pcpu_stats)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void ipvlan_uninit(struct net_device *dev)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct ipvl_port *port = ipvlan->port;
+
+ if (ipvlan->pcpu_stats)
+ free_percpu(ipvlan->pcpu_stats);
+
+ port->count -= 1;
+ if (!port->count)
+ ipvlan_port_destroy(port->dev);
+}
+
+static int ipvlan_open(struct net_device *dev)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct net_device *phy_dev = ipvlan->phy_dev;
+ struct ipvl_addr *addr;
+
+ if (ipvlan->port->mode == IPVLAN_MODE_L3)
+ dev->flags |= IFF_NOARP;
+ else
+ dev->flags &= ~IFF_NOARP;
+
+ if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) {
+ list_for_each_entry(addr, &ipvlan->addrs, anode)
+ ipvlan_ht_addr_add(ipvlan, addr);
+ }
+ return dev_uc_add(phy_dev, phy_dev->dev_addr);
+}
+
+static int ipvlan_stop(struct net_device *dev)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct net_device *phy_dev = ipvlan->phy_dev;
+ struct ipvl_addr *addr;
+
+ dev_uc_unsync(phy_dev, dev);
+ dev_mc_unsync(phy_dev, dev);
+
+ dev_uc_del(phy_dev, phy_dev->dev_addr);
+
+ if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) {
+ list_for_each_entry(addr, &ipvlan->addrs, anode)
+ ipvlan_ht_addr_del(addr, !dev->dismantle);
+ }
+ return 0;
+}
+
+netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ const struct ipvl_dev *ipvlan = netdev_priv(dev);
+ int skblen = skb->len;
+ int ret;
+
+ ret = ipvlan_queue_xmit(skb, dev);
+ if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
+ struct ipvl_pcpu_stats *pcptr;
+
+ pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
+
+ u64_stats_update_begin(&pcptr->syncp);
+ pcptr->tx_pkts++;
+ pcptr->tx_bytes += skblen;
+ u64_stats_update_end(&pcptr->syncp);
+ } else {
+ this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
+ }
+ return ret;
+}
+
+static netdev_features_t ipvlan_fix_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+
+ return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
+}
+
+static void ipvlan_change_rx_flags(struct net_device *dev, int change)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct net_device *phy_dev = ipvlan->phy_dev;
+
+ if (change & IFF_ALLMULTI)
+ dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
+}
+
+static void ipvlan_set_broadcast_mac_filter(struct ipvl_dev *ipvlan, bool set)
+{
+ struct net_device *dev = ipvlan->dev;
+ unsigned int hashbit = ipvlan_mac_hash(dev->broadcast);
+
+ if (set && !test_bit(hashbit, ipvlan->mac_filters))
+ __set_bit(hashbit, ipvlan->mac_filters);
+ else if (!set && test_bit(hashbit, ipvlan->mac_filters))
+ __clear_bit(hashbit, ipvlan->mac_filters);
+}
+
+static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+
+ if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
+ bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
+ } else {
+ struct netdev_hw_addr *ha;
+ DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
+
+ bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
+ netdev_for_each_mc_addr(ha, dev)
+ __set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
+
+ bitmap_copy(ipvlan->mac_filters, mc_filters,
+ IPVLAN_MAC_FILTER_SIZE);
+ }
+ dev_uc_sync(ipvlan->phy_dev, dev);
+ dev_mc_sync(ipvlan->phy_dev, dev);
+}
+
+static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *s)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+
+ if (ipvlan->pcpu_stats) {
+ struct ipvl_pcpu_stats *pcptr;
+ u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
+ u32 rx_errs = 0, tx_drps = 0;
+ u32 strt;
+ int idx;
+
+ for_each_possible_cpu(idx) {
+ pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
+ do {
+ strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
+ rx_pkts = pcptr->rx_pkts;
+ rx_bytes = pcptr->rx_bytes;
+ rx_mcast = pcptr->rx_mcast;
+ tx_pkts = pcptr->tx_pkts;
+ tx_bytes = pcptr->tx_bytes;
+ } while (u64_stats_fetch_retry_irq(&pcptr->syncp,
+ strt));
+
+ s->rx_packets += rx_pkts;
+ s->rx_bytes += rx_bytes;
+ s->multicast += rx_mcast;
+ s->tx_packets += tx_pkts;
+ s->tx_bytes += tx_bytes;
+
+ /* u32 values are updated without syncp protection. */
+ rx_errs += pcptr->rx_errs;
+ tx_drps += pcptr->tx_drps;
+ }
+ s->rx_errors = rx_errs;
+ s->rx_dropped = rx_errs;
+ s->tx_dropped = tx_drps;
+ }
+ return s;
+}
+
+static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct net_device *phy_dev = ipvlan->phy_dev;
+
+ return vlan_vid_add(phy_dev, proto, vid);
+}
+
+static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
+ u16 vid)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct net_device *phy_dev = ipvlan->phy_dev;
+
+ vlan_vid_del(phy_dev, proto, vid);
+ return 0;
+}
+
+static const struct net_device_ops ipvlan_netdev_ops = {
+ .ndo_init = ipvlan_init,
+ .ndo_uninit = ipvlan_uninit,
+ .ndo_open = ipvlan_open,
+ .ndo_stop = ipvlan_stop,
+ .ndo_start_xmit = ipvlan_start_xmit,
+ .ndo_fix_features = ipvlan_fix_features,
+ .ndo_change_rx_flags = ipvlan_change_rx_flags,
+ .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
+ .ndo_get_stats64 = ipvlan_get_stats64,
+ .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
+};
+
+static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, const void *daddr,
+ const void *saddr, unsigned len)
+{
+ const struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct net_device *phy_dev = ipvlan->phy_dev;
+
+ /* TODO Probably use a different field than dev_addr so that the
+ * mac-address on the virtual device is portable and can be carried
+ * while the packets use the mac-addr on the physical device.
+ */
+ return dev_hard_header(skb, phy_dev, type, daddr,
+ saddr ? : dev->dev_addr, len);
+}
+
+static const struct header_ops ipvlan_header_ops = {
+ .create = ipvlan_hard_header,
+ .rebuild = eth_rebuild_header,
+ .parse = eth_header_parse,
+ .cache = eth_header_cache,
+ .cache_update = eth_header_cache_update,
+};
+
+static int ipvlan_ethtool_get_settings(struct net_device *dev,
+ struct ethtool_cmd *cmd)
+{
+ const struct ipvl_dev *ipvlan = netdev_priv(dev);
+
+ return __ethtool_get_settings(ipvlan->phy_dev, cmd);
+}
+
+static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
+ strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
+}
+
+static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
+{
+ const struct ipvl_dev *ipvlan = netdev_priv(dev);
+
+ return ipvlan->msg_enable;
+}
+
+static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+
+ ipvlan->msg_enable = value;
+}
+
+static const struct ethtool_ops ipvlan_ethtool_ops = {
+ .get_link = ethtool_op_get_link,
+ .get_settings = ipvlan_ethtool_get_settings,
+ .get_drvinfo = ipvlan_ethtool_get_drvinfo,
+ .get_msglevel = ipvlan_ethtool_get_msglevel,
+ .set_msglevel = ipvlan_ethtool_set_msglevel,
+};
+
+static int ipvlan_nl_changelink(struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
+
+ if (data && data[IFLA_IPVLAN_MODE]) {
+ u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
+
+ ipvlan_set_port_mode(port, nmode);
+ }
+ return 0;
+}
+
+static size_t ipvlan_nl_getsize(const struct net_device *dev)
+{
+ return (0
+ + nla_total_size(2) /* IFLA_IPVLAN_MODE */
+ );
+}
+
+static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ if (data && data[IFLA_IPVLAN_MODE]) {
+ u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
+
+ if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX)
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int ipvlan_nl_fillinfo(struct sk_buff *skb,
+ const struct net_device *dev)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
+ int ret = -EINVAL;
+
+ if (!port)
+ goto err;
+
+ ret = -EMSGSIZE;
+ if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
+ goto err;
+
+ return 0;
+
+err:
+ return ret;
+}
+
+static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct ipvl_port *port;
+ struct net_device *phy_dev;
+ int err;
+
+ if (!tb[IFLA_LINK])
+ return -EINVAL;
+
+ phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
+ if (!phy_dev)
+ return -ENODEV;
+
+ if (ipvlan_dev_slave(phy_dev)) {
+ struct ipvl_dev *tmp = netdev_priv(phy_dev);
+
+ phy_dev = tmp->phy_dev;
+ } else if (!ipvlan_dev_master(phy_dev)) {
+ err = ipvlan_port_create(phy_dev);
+ if (err < 0)
+ return err;
+ }
+
+ port = ipvlan_port_get_rtnl(phy_dev);
+ if (data && data[IFLA_IPVLAN_MODE])
+ port->mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
+
+ ipvlan->phy_dev = phy_dev;
+ ipvlan->dev = dev;
+ ipvlan->port = port;
+ ipvlan->sfeatures = IPVLAN_FEATURES;
+ INIT_LIST_HEAD(&ipvlan->addrs);
+ ipvlan->ipv4cnt = 0;
+ ipvlan->ipv6cnt = 0;
+
+ /* TODO Probably put random address here to be presented to the
+ * world but keep using the physical-dev address for the outgoing
+ * packets.
+ */
+ memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
+
+ dev->priv_flags |= IFF_IPVLAN_SLAVE;
+
+ port->count += 1;
+ err = register_netdevice(dev);
+ if (err < 0)
+ goto ipvlan_destroy_port;
+
+ err = netdev_upper_dev_link(phy_dev, dev);
+ if (err)
+ goto ipvlan_destroy_port;
+
+ list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
+ netif_stacked_transfer_operstate(phy_dev, dev);
+ return 0;
+
+ipvlan_destroy_port:
+ port->count -= 1;
+ if (!port->count)
+ ipvlan_port_destroy(phy_dev);
+
+ return err;
+}
+
+static void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct ipvl_addr *addr, *next;
+
+ if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) {
+ list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
+ ipvlan_ht_addr_del(addr, !dev->dismantle);
+ list_del_rcu(&addr->anode);
+ }
+ }
+ list_del_rcu(&ipvlan->pnode);
+ unregister_netdevice_queue(dev, head);
+ netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
+}
+
+static void ipvlan_link_setup(struct net_device *dev)
+{
+ ether_setup(dev);
+
+ dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
+ dev->priv_flags |= IFF_UNICAST_FLT;
+ dev->netdev_ops = &ipvlan_netdev_ops;
+ dev->destructor = free_netdev;
+ dev->header_ops = &ipvlan_header_ops;
+ dev->ethtool_ops = &ipvlan_ethtool_ops;
+ dev->tx_queue_len = 0;
+}
+
+static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
+{
+ [IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
+};
+
+static struct rtnl_link_ops ipvlan_link_ops = {
+ .kind = "ipvlan",
+ .priv_size = sizeof(struct ipvl_dev),
+
+ .get_size = ipvlan_nl_getsize,
+ .policy = ipvlan_nl_policy,
+ .validate = ipvlan_nl_validate,
+ .fill_info = ipvlan_nl_fillinfo,
+ .changelink = ipvlan_nl_changelink,
+ .maxtype = IFLA_IPVLAN_MAX,
+
+ .setup = ipvlan_link_setup,
+ .newlink = ipvlan_link_new,
+ .dellink = ipvlan_link_delete,
+};
+
+int ipvlan_link_register(struct rtnl_link_ops *ops)
+{
+ return rtnl_link_register(ops);
+}
+
+static int ipvlan_device_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct ipvl_dev *ipvlan, *next;
+ struct ipvl_port *port;
+ LIST_HEAD(lst_kill);
+
+ if (!ipvlan_dev_master(dev))
+ return NOTIFY_DONE;
+
+ port = ipvlan_port_get_rtnl(dev);
+
+ switch (event) {
+ case NETDEV_CHANGE:
+ list_for_each_entry(ipvlan, &port->ipvlans, pnode)
+ netif_stacked_transfer_operstate(ipvlan->phy_dev,
+ ipvlan->dev);
+ break;
+
+ case NETDEV_UNREGISTER:
+ if (dev->reg_state != NETREG_UNREGISTERING)
+ break;
+
+ list_for_each_entry_safe(ipvlan, next, &port->ipvlans,
+ pnode)
+ ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
+ &lst_kill);
+ unregister_netdevice_many(&lst_kill);
+ break;
+
+ case NETDEV_FEAT_CHANGE:
+ list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
+ ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
+ ipvlan->dev->gso_max_size = dev->gso_max_size;
+ netdev_features_change(ipvlan->dev);
+ }
+ break;
+
+ case NETDEV_CHANGEMTU:
+ list_for_each_entry(ipvlan, &port->ipvlans, pnode)
+ ipvlan_adjust_mtu(ipvlan, dev);
+ break;
+
+ case NETDEV_PRE_TYPE_CHANGE:
+ /* Forbid underlying device to change its type. */
+ return NOTIFY_BAD;
+ }
+ return NOTIFY_DONE;
+}
+
+static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
+{
+ struct ipvl_addr *addr;
+
+ if (ipvlan_addr_busy(ipvlan, ip6_addr, true)) {
+ netif_err(ipvlan, ifup, ipvlan->dev,
+ "Failed to add IPv6=%pI6c addr for %s intf\n",
+ ip6_addr, ipvlan->dev->name);
+ return -EINVAL;
+ }
+ addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
+ if (!addr)
+ return -ENOMEM;
+
+ addr->master = ipvlan;
+ memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr));
+ addr->atype = IPVL_IPV6;
+ list_add_tail_rcu(&addr->anode, &ipvlan->addrs);
+ ipvlan->ipv6cnt++;
+ ipvlan_ht_addr_add(ipvlan, addr);
+
+ return 0;
+}
+
+static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
+{
+ struct ipvl_addr *addr;
+
+ addr = ipvlan_ht_addr_lookup(ipvlan->port, ip6_addr, true);
+ if (!addr)
+ return;
+
+ ipvlan_ht_addr_del(addr, true);
+ list_del_rcu(&addr->anode);
+ ipvlan->ipv6cnt--;
+ WARN_ON(ipvlan->ipv6cnt < 0);
+ kfree_rcu(addr, rcu);
+
+ return;
+}
+
+static int ipvlan_addr6_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
+ struct net_device *dev = (struct net_device *)if6->idev->dev;
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+
+ if (!ipvlan_dev_slave(dev))
+ return NOTIFY_DONE;
+
+ if (!ipvlan || !ipvlan->port)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_UP:
+ if (ipvlan_add_addr6(ipvlan, &if6->addr))
+ return NOTIFY_BAD;
+ break;
+
+ case NETDEV_DOWN:
+ ipvlan_del_addr6(ipvlan, &if6->addr);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
+{
+ struct ipvl_addr *addr;
+
+ if (ipvlan_addr_busy(ipvlan, ip4_addr, false)) {
+ netif_err(ipvlan, ifup, ipvlan->dev,
+ "Failed to add IPv4=%pI4 on %s intf.\n",
+ ip4_addr, ipvlan->dev->name);
+ return -EINVAL;
+ }
+ addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL);
+ if (!addr)
+ return -ENOMEM;
+
+ addr->master = ipvlan;
+ memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr));
+ addr->atype = IPVL_IPV4;
+ list_add_tail_rcu(&addr->anode, &ipvlan->addrs);
+ ipvlan->ipv4cnt++;
+ ipvlan_ht_addr_add(ipvlan, addr);
+ ipvlan_set_broadcast_mac_filter(ipvlan, true);
+
+ return 0;
+}
+
+static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
+{
+ struct ipvl_addr *addr;
+
+ addr = ipvlan_ht_addr_lookup(ipvlan->port, ip4_addr, false);
+ if (!addr)
+ return;
+
+ ipvlan_ht_addr_del(addr, true);
+ list_del_rcu(&addr->anode);
+ ipvlan->ipv4cnt--;
+ WARN_ON(ipvlan->ipv4cnt < 0);
+ if (!ipvlan->ipv4cnt)
+ ipvlan_set_broadcast_mac_filter(ipvlan, false);
+ kfree_rcu(addr, rcu);
+
+ return;
+}
+
+static int ipvlan_addr4_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
+ struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+ struct in_addr ip4_addr;
+
+ if (!ipvlan_dev_slave(dev))
+ return NOTIFY_DONE;
+
+ if (!ipvlan || !ipvlan->port)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_UP:
+ ip4_addr.s_addr = if4->ifa_address;
+ if (ipvlan_add_addr4(ipvlan, &ip4_addr))
+ return NOTIFY_BAD;
+ break;
+
+ case NETDEV_DOWN:
+ ip4_addr.s_addr = if4->ifa_address;
+ ipvlan_del_addr4(ipvlan, &ip4_addr);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
+ .notifier_call = ipvlan_addr4_event,
+};
+
+static struct notifier_block ipvlan_notifier_block __read_mostly = {
+ .notifier_call = ipvlan_device_event,
+};
+
+static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
+ .notifier_call = ipvlan_addr6_event,
+};
+
+static int __init ipvlan_init_module(void)
+{
+ int err;
+
+ ipvlan_init_secret();
+ register_netdevice_notifier(&ipvlan_notifier_block);
+ register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
+ register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
+
+ err = ipvlan_link_register(&ipvlan_link_ops);
+ if (err < 0)
+ goto error;
+
+ return 0;
+error:
+ unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
+ unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
+ unregister_netdevice_notifier(&ipvlan_notifier_block);
+ return err;
+}
+
+static void __exit ipvlan_cleanup_module(void)
+{
+ rtnl_link_unregister(&ipvlan_link_ops);
+ unregister_netdevice_notifier(&ipvlan_notifier_block);
+ unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
+ unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
+}
+
+module_init(ipvlan_init_module);
+module_exit(ipvlan_cleanup_module);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
+MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
+MODULE_ALIAS_RTNL_LINK("ipvlan");
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff