| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> |
| * |
| * The code this is based on carried the following copyright notice: |
| * --- |
| * (C) Copyright 2001-2006 |
| * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com |
| * Re-worked by Ben Greear <greearb@candelatech.com> |
| * --- |
| */ |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/rculist.h> |
| #include <linux/notifier.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/net_tstamp.h> |
| #include <linux/ethtool.h> |
| #include <linux/if_arp.h> |
| #include <linux/if_vlan.h> |
| #include <linux/if_link.h> |
| #include <linux/if_macvlan.h> |
| #include <linux/hash.h> |
| #include <linux/workqueue.h> |
| #include <net/rtnetlink.h> |
| #include <net/xfrm.h> |
| #include <linux/netpoll.h> |
| #include <linux/phy.h> |
| |
| #define MACVLAN_HASH_BITS 8 |
| #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS) |
| #define MACVLAN_DEFAULT_BC_QUEUE_LEN 1000 |
| |
| #define MACVLAN_F_PASSTHRU 1 |
| #define MACVLAN_F_ADDRCHANGE 2 |
| |
| struct macvlan_port { |
| struct net_device *dev; |
| struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; |
| struct list_head vlans; |
| struct sk_buff_head bc_queue; |
| struct work_struct bc_work; |
| u32 bc_queue_len_used; |
| int bc_cutoff; |
| u32 flags; |
| int count; |
| struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; |
| DECLARE_BITMAP(bc_filter, MACVLAN_MC_FILTER_SZ); |
| DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); |
| unsigned char perm_addr[ETH_ALEN]; |
| }; |
| |
| struct macvlan_source_entry { |
| struct hlist_node hlist; |
| struct macvlan_dev *vlan; |
| unsigned char addr[6+2] __aligned(sizeof(u16)); |
| struct rcu_head rcu; |
| }; |
| |
| struct macvlan_skb_cb { |
| const struct macvlan_dev *src; |
| }; |
| |
| #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) |
| |
| static void macvlan_port_destroy(struct net_device *dev); |
| static void update_port_bc_queue_len(struct macvlan_port *port); |
| |
| static inline bool macvlan_passthru(const struct macvlan_port *port) |
| { |
| return port->flags & MACVLAN_F_PASSTHRU; |
| } |
| |
| static inline void macvlan_set_passthru(struct macvlan_port *port) |
| { |
| port->flags |= MACVLAN_F_PASSTHRU; |
| } |
| |
| static inline bool macvlan_addr_change(const struct macvlan_port *port) |
| { |
| return port->flags & MACVLAN_F_ADDRCHANGE; |
| } |
| |
| static inline void macvlan_set_addr_change(struct macvlan_port *port) |
| { |
| port->flags |= MACVLAN_F_ADDRCHANGE; |
| } |
| |
| static inline void macvlan_clear_addr_change(struct macvlan_port *port) |
| { |
| port->flags &= ~MACVLAN_F_ADDRCHANGE; |
| } |
| |
| /* 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); |
| } |
| |
| 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, |
| lockdep_rtnl_is_held()) { |
| 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, lockdep_rtnl_is_held()) { |
| 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. |
| */ |
| eth_hw_addr_set(vlan->dev, addr); |
| macvlan_hash_add(vlan); |
| } |
| |
| static bool macvlan_addr_busy(const struct macvlan_port *port, |
| const unsigned char *addr) |
| { |
| /* Test to see if the specified address is |
| * currently in use by the underlying device or |
| * another macvlan. |
| */ |
| if (!macvlan_passthru(port) && !macvlan_addr_change(port) && |
| ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
| return true; |
| |
| if (macvlan_hash_lookup(port, addr)) |
| return true; |
| |
| return false; |
| } |
| |
| |
| 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; |
| |
| hash_for_each_rcu(port->vlan_hash, i, vlan, 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(nskb); |
| macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
| err == NET_RX_SUCCESS, true); |
| } |
| } |
| |
| static void macvlan_multicast_rx(const struct macvlan_port *port, |
| const struct macvlan_dev *src, |
| struct sk_buff *skb) |
| { |
| 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); |
| } |
| |
| 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(); |
| macvlan_multicast_rx(port, src, skb); |
| rcu_read_unlock(); |
| |
| if (src) |
| dev_put(src->dev); |
| consume_skb(skb); |
| |
| cond_resched(); |
| } |
| } |
| |
| static void macvlan_broadcast_enqueue(struct macvlan_port *port, |
| const struct macvlan_dev *src, |
| struct sk_buff *skb) |
| { |
| struct sk_buff *nskb; |
| int err = -ENOMEM; |
| |
| nskb = skb_clone(skb, GFP_ATOMIC); |
| if (!nskb) |
| goto err; |
| |
| MACVLAN_SKB_CB(nskb)->src = src; |
| |
| spin_lock(&port->bc_queue.lock); |
| if (skb_queue_len(&port->bc_queue) < port->bc_queue_len_used) { |
| if (src) |
| dev_hold(src->dev); |
| __skb_queue_tail(&port->bc_queue, nskb); |
| err = 0; |
| } |
| spin_unlock(&port->bc_queue.lock); |
| |
| queue_work(system_unbound_wq, &port->bc_work); |
| |
| if (err) |
| goto free_nskb; |
| |
| return; |
| |
| free_nskb: |
| kfree_skb(nskb); |
| err: |
| dev_core_stats_rx_dropped_inc(skb->dev); |
| } |
| |
| static void macvlan_flush_sources(struct macvlan_port *port, |
| struct macvlan_dev *vlan) |
| { |
| struct macvlan_source_entry *entry; |
| struct hlist_node *next; |
| int i; |
| |
| hash_for_each_safe(port->vlan_source_hash, i, next, 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; |
| |
| if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, dev->dev_addr)) |
| nskb->pkt_type = PACKET_HOST; |
| |
| ret = __netif_rx(nskb); |
| macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
| } |
| |
| static bool 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]; |
| bool consume = false; |
| |
| hlist_for_each_entry_rcu(entry, h, hlist) { |
| if (ether_addr_equal_64bits(entry->addr, addr)) { |
| if (entry->vlan->flags & MACVLAN_FLAG_NODST) |
| consume = true; |
| macvlan_forward_source_one(skb, entry->vlan); |
| } |
| } |
| |
| return consume; |
| } |
| |
| /* 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; |
| |
| /* Packets from dev_loopback_xmit() do not have L2 header, bail out */ |
| if (unlikely(skb->pkt_type == PACKET_LOOPBACK)) |
| return RX_HANDLER_PASS; |
| |
| port = macvlan_port_get_rcu(skb->dev); |
| if (is_multicast_ether_addr(eth->h_dest)) { |
| unsigned int hash; |
| |
| skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN); |
| if (!skb) |
| return RX_HANDLER_CONSUMED; |
| *pskb = skb; |
| eth = eth_hdr(skb); |
| if (macvlan_forward_source(skb, port, eth->h_source)) { |
| kfree_skb(skb); |
| return RX_HANDLER_CONSUMED; |
| } |
| 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; |
| } |
| |
| hash = mc_hash(NULL, eth->h_dest); |
| if (test_bit(hash, port->bc_filter)) |
| macvlan_broadcast_enqueue(port, src, skb); |
| else if (test_bit(hash, port->mc_filter)) |
| macvlan_multicast_rx(port, src, skb); |
| |
| return RX_HANDLER_PASS; |
| } |
| |
| if (macvlan_forward_source(skb, port, eth->h_source)) { |
| kfree_skb(skb); |
| return RX_HANDLER_CONSUMED; |
| } |
| if (macvlan_passthru(port)) |
| vlan = list_first_or_null_rcu(&port->vlans, |
| struct macvlan_dev, list); |
| else |
| vlan = macvlan_hash_lookup(port, eth->h_dest); |
| if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE) |
| 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); |
| const struct macvlan_port *port = vlan->port; |
| const struct macvlan_dev *dest; |
| |
| if (vlan->mode == MACVLAN_MODE_BRIDGE) { |
| const struct ethhdr *eth = skb_eth_hdr(skb); |
| |
| /* send to other bridge ports directly */ |
| if (is_multicast_ether_addr(eth->h_dest)) { |
| skb_reset_mac_header(skb); |
| 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_accel(skb, |
| netdev_get_sb_channel(dev) ? dev : NULL); |
| } |
| |
| static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
| { |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| return netpoll_send_skb(vlan->netpoll, skb); |
| #else |
| BUG(); |
| return NETDEV_TX_OK; |
| #endif |
| } |
| |
| static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| unsigned int len = skb->len; |
| int ret; |
| |
| if (unlikely(netpoll_tx_running(dev))) |
| return macvlan_netpoll_send_skb(vlan, skb); |
| |
| 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); |
| u64_stats_inc(&pcpu_stats->tx_packets); |
| u64_stats_add(&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, |
| .parse_protocol = eth_header_parse_protocol, |
| }; |
| |
| static int macvlan_open(struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| struct net_device *lowerdev = vlan->lowerdev; |
| int err; |
| |
| if (macvlan_passthru(vlan->port)) { |
| if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
| err = dev_set_promiscuity(lowerdev, 1); |
| if (err < 0) |
| goto out; |
| } |
| goto hash_add; |
| } |
| |
| err = -EADDRINUSE; |
| if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
| goto out; |
| |
| /* Attempt to populate accel_priv which is used to offload the L2 |
| * forwarding requests for unicast packets. |
| */ |
| if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) |
| vlan->accel_priv = |
| lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); |
| |
| /* If earlier attempt to offload failed, or accel_priv is not |
| * populated we must add the unicast address to the lower device. |
| */ |
| if (IS_ERR_OR_NULL(vlan->accel_priv)) { |
| vlan->accel_priv = NULL; |
| 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: |
| if (vlan->accel_priv) { |
| lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
| vlan->accel_priv); |
| vlan->accel_priv = NULL; |
| } else { |
| dev_uc_del(lowerdev, dev->dev_addr); |
| } |
| out: |
| return err; |
| } |
| |
| static int macvlan_stop(struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| struct net_device *lowerdev = vlan->lowerdev; |
| |
| if (vlan->accel_priv) { |
| lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
| vlan->accel_priv); |
| vlan->accel_priv = NULL; |
| } |
| |
| dev_uc_unsync(lowerdev, dev); |
| dev_mc_unsync(lowerdev, dev); |
| |
| if (macvlan_passthru(vlan->port)) { |
| 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, |
| const unsigned char *addr) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| struct net_device *lowerdev = vlan->lowerdev; |
| struct macvlan_port *port = vlan->port; |
| int err; |
| |
| if (!(dev->flags & IFF_UP)) { |
| /* Just copy in the new address */ |
| eth_hw_addr_set(dev, addr); |
| } else { |
| /* Rehash and update the device filters */ |
| if (macvlan_addr_busy(vlan->port, addr)) |
| return -EADDRINUSE; |
| |
| if (!macvlan_passthru(port)) { |
| err = dev_uc_add(lowerdev, addr); |
| if (err) |
| return err; |
| |
| dev_uc_del(lowerdev, dev->dev_addr); |
| } |
| |
| macvlan_hash_change_addr(vlan, addr); |
| } |
| if (macvlan_passthru(port) && !macvlan_addr_change(port)) { |
| /* Since addr_change isn't set, we are here due to lower |
| * device change. Save the lower-dev address so we can |
| * restore it later. |
| */ |
| ether_addr_copy(vlan->port->perm_addr, |
| lowerdev->dev_addr); |
| } |
| macvlan_clear_addr_change(port); |
| 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 the addresses are the same, this is a no-op */ |
| if (ether_addr_equal(dev->dev_addr, addr->sa_data)) |
| return 0; |
| |
| if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
| macvlan_set_addr_change(vlan->port); |
| return dev_set_mac_address(vlan->lowerdev, addr, NULL); |
| } |
| |
| if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
| return -EADDRINUSE; |
| |
| 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 (!macvlan_passthru(vlan->port) && 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, int cutoff) |
| { |
| if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
| bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ); |
| } else { |
| DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); |
| struct netdev_hw_addr *ha; |
| |
| bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); |
| netdev_for_each_mc_addr(ha, dev) { |
| if (!vlan && ha->synced <= cutoff) |
| continue; |
| |
| __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_recompute_bc_filter(struct macvlan_dev *vlan) |
| { |
| if (vlan->port->bc_cutoff < 0) { |
| bitmap_zero(vlan->port->bc_filter, MACVLAN_MC_FILTER_SZ); |
| return; |
| } |
| |
| macvlan_compute_filter(vlan->port->bc_filter, vlan->lowerdev, NULL, |
| vlan->port->bc_cutoff); |
| } |
| |
| 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, 0); |
| |
| 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, |
| 0); |
| macvlan_recompute_bc_filter(vlan); |
| } |
| |
| static void update_port_bc_cutoff(struct macvlan_dev *vlan, int cutoff) |
| { |
| if (vlan->port->bc_cutoff == cutoff) |
| return; |
| |
| vlan->port->bc_cutoff = cutoff; |
| macvlan_recompute_bc_filter(vlan); |
| } |
| |
| 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; |
| WRITE_ONCE(dev->mtu, new_mtu); |
| return 0; |
| } |
| |
| static int macvlan_hwtstamp_get(struct net_device *dev, |
| struct kernel_hwtstamp_config *cfg) |
| { |
| struct net_device *real_dev = macvlan_dev_real_dev(dev); |
| |
| return generic_hwtstamp_get_lower(real_dev, cfg); |
| } |
| |
| static int macvlan_hwtstamp_set(struct net_device *dev, |
| struct kernel_hwtstamp_config *cfg, |
| struct netlink_ext_ack *extack) |
| { |
| struct net_device *real_dev = macvlan_dev_real_dev(dev); |
| |
| if (!net_eq(dev_net(dev), &init_net)) |
| return -EOPNOTSUPP; |
| |
| return generic_hwtstamp_set_lower(real_dev, cfg, extack); |
| } |
| |
| /* |
| * 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_OFFLOADS \ |
| (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \ |
| NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL) |
| |
| #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX) |
| |
| #define MACVLAN_FEATURES \ |
| (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
| NETIF_F_GSO | NETIF_F_TSO | 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 void macvlan_set_lockdep_class(struct net_device *dev) |
| { |
| netdev_lockdep_set_classes(dev); |
| lockdep_set_class(&dev->addr_list_lock, |
| &macvlan_netdev_addr_lock_key); |
| } |
| |
| static int macvlan_init(struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| 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->vlan_features |= ALWAYS_ON_OFFLOADS; |
| dev->hw_enc_features |= dev->features; |
| netif_inherit_tso_max(dev, lowerdev); |
| 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; |
| |
| /* Get macvlan's reference to lowerdev */ |
| netdev_hold(lowerdev, &vlan->dev_tracker, GFP_KERNEL); |
| |
| 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 void 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(&p->syncp); |
| rx_packets = u64_stats_read(&p->rx_packets); |
| rx_bytes = u64_stats_read(&p->rx_bytes); |
| rx_multicast = u64_stats_read(&p->rx_multicast); |
| tx_packets = u64_stats_read(&p->tx_packets); |
| tx_bytes = u64_stats_read(&p->tx_bytes); |
| } while (u64_stats_fetch_retry(&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 += READ_ONCE(p->rx_errors); |
| tx_dropped += READ_ONCE(p->tx_dropped); |
| } |
| stats->rx_errors = rx_errors; |
| stats->rx_dropped = rx_errors; |
| stats->tx_dropped = tx_dropped; |
| } |
| } |
| |
| 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 netlink_ext_ack *extack) |
| { |
| 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 (!macvlan_passthru(vlan->port) && 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 netlink_ext_ack *extack) |
| { |
| 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 (!macvlan_passthru(vlan->port) && 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) |
| { |
| strscpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
| strscpy(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 int macvlan_ethtool_get_ts_info(struct net_device *dev, |
| struct kernel_ethtool_ts_info *info) |
| { |
| struct net_device *real_dev = macvlan_dev_real_dev(dev); |
| |
| return ethtool_get_ts_info_by_layer(real_dev, info); |
| } |
| |
| 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 &= (ALWAYS_ON_FEATURES | MACVLAN_FEATURES); |
| |
| 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; |
| |
| 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(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 READ_ONCE(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, |
| .get_ts_info = macvlan_ethtool_get_ts_info, |
| }; |
| |
| 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, |
| #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, |
| .ndo_hwtstamp_get = macvlan_hwtstamp_get, |
| .ndo_hwtstamp_set = macvlan_hwtstamp_set, |
| }; |
| |
| static void macvlan_dev_free(struct net_device *dev) |
| { |
| struct macvlan_dev *vlan = netdev_priv(dev); |
| |
| /* Get rid of the macvlan's reference to lowerdev */ |
| netdev_put(vlan->lowerdev, &vlan->dev_tracker); |
| } |
| |
| void macvlan_common_setup(struct net_device *dev) |
| { |
| ether_setup(dev); |
| |
| /* ether_setup() has set dev->min_mtu to ETH_MIN_MTU. */ |
| dev->max_mtu = ETH_MAX_MTU; |
| dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
| netif_keep_dst(dev); |
| dev->priv_flags |= IFF_UNICAST_FLT | IFF_CHANGE_PROTO_DOWN; |
| dev->netdev_ops = &macvlan_netdev_ops; |
| dev->needs_free_netdev = true; |
| dev->priv_destructor = macvlan_dev_free; |
| 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 (netdev_is_rx_handler_busy(dev)) |
| return -EBUSY; |
| |
| port = kzalloc(sizeof(*port), GFP_KERNEL); |
| if (port == NULL) |
| return -ENOMEM; |
| |
| port->dev = dev; |
| ether_addr_copy(port->perm_addr, dev->dev_addr); |
| 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]); |
| |
| port->bc_queue_len_used = 0; |
| port->bc_cutoff = 1; |
| 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); |
| struct sk_buff *skb; |
| |
| 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); |
| |
| while ((skb = __skb_dequeue(&port->bc_queue))) { |
| const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; |
| |
| if (src) |
| dev_put(src->dev); |
| |
| kfree_skb(skb); |
| } |
| |
| /* If the lower device address has been changed by passthru |
| * macvlan, put it back. |
| */ |
| if (macvlan_passthru(port) && |
| !ether_addr_equal(port->dev->dev_addr, port->perm_addr)) { |
| struct sockaddr sa; |
| |
| sa.sa_family = port->dev->type; |
| memcpy(&sa.sa_data, port->perm_addr, port->dev->addr_len); |
| dev_set_mac_address(port->dev, &sa, NULL); |
| } |
| |
| kfree(port); |
| } |
| |
| static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *nla, *head; |
| int rem, len; |
| |
| 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) |
| return 0; |
| |
| if (data[IFLA_MACVLAN_FLAGS] && |
| nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~(MACVLAN_FLAG_NOPROMISC | |
| MACVLAN_FLAG_NODST)) |
| return -EINVAL; |
| |
| if (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[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[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[IFLA_MACVLAN_MACADDR_DATA]) { |
| 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) |
| return -EINVAL; |
| |
| if (!is_valid_ether_addr(nla_data(nla))) |
| return -EADDRNOTAVAIL; |
| } |
| } |
| |
| if (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[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) { |
| 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 netlink_ext_ack *extack) |
| { |
| 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 (!netif_is_macvlan_port(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 (macvlan_passthru(port)) { |
| /* 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->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; |
| } |
| macvlan_set_passthru(port); |
| 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; |
| } |
| |
| vlan->bc_queue_len_req = MACVLAN_DEFAULT_BC_QUEUE_LEN; |
| if (data && data[IFLA_MACVLAN_BC_QUEUE_LEN]) |
| vlan->bc_queue_len_req = nla_get_u32(data[IFLA_MACVLAN_BC_QUEUE_LEN]); |
| |
| if (data && data[IFLA_MACVLAN_BC_CUTOFF]) |
| update_port_bc_cutoff( |
| vlan, nla_get_s32(data[IFLA_MACVLAN_BC_CUTOFF])); |
| |
| err = register_netdevice(dev); |
| if (err < 0) |
| goto destroy_macvlan_port; |
| |
| dev->priv_flags |= IFF_MACVLAN; |
| err = netdev_upper_dev_link(lowerdev, dev, extack); |
| if (err) |
| goto unregister_netdev; |
| |
| list_add_tail_rcu(&vlan->list, &port->vlans); |
| update_port_bc_queue_len(vlan->port); |
| netif_stacked_transfer_operstate(lowerdev, dev); |
| linkwatch_fire_event(dev); |
| |
| return 0; |
| |
| unregister_netdev: |
| /* macvlan_uninit would free the macvlan port */ |
| unregister_netdevice(dev); |
| return err; |
| destroy_macvlan_port: |
| /* the macvlan port may be freed by macvlan_uninit when fail to register. |
| * so we destroy the macvlan port only when it's valid. |
| */ |
| if (create && macvlan_port_get_rtnl(lowerdev)) { |
| macvlan_flush_sources(port, vlan); |
| 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[], |
| struct netlink_ext_ack *extack) |
| { |
| return macvlan_common_newlink(src_net, dev, tb, data, extack); |
| } |
| |
| 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); |
| update_port_bc_queue_len(vlan->port); |
| 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 netlink_ext_ack *extack) |
| { |
| 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 (macvlan_passthru(vlan->port) && 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 (data && data[IFLA_MACVLAN_BC_QUEUE_LEN]) { |
| vlan->bc_queue_len_req = nla_get_u32(data[IFLA_MACVLAN_BC_QUEUE_LEN]); |
| update_port_bc_queue_len(vlan->port); |
| } |
| |
| if (data && data[IFLA_MACVLAN_BC_CUTOFF]) |
| update_port_bc_cutoff( |
| vlan, nla_get_s32(data[IFLA_MACVLAN_BC_CUTOFF])); |
| |
| 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 */ |
| + nla_total_size(4) /* IFLA_MACVLAN_BC_QUEUE_LEN */ |
| + nla_total_size(4) /* IFLA_MACVLAN_BC_QUEUE_LEN_USED */ |
| ); |
| } |
| |
| 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, lockdep_rtnl_is_held()) { |
| 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); |
| struct macvlan_port *port = vlan->port; |
| 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_noflag(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); |
| } |
| if (nla_put_u32(skb, IFLA_MACVLAN_BC_QUEUE_LEN, vlan->bc_queue_len_req)) |
| goto nla_put_failure; |
| if (nla_put_u32(skb, IFLA_MACVLAN_BC_QUEUE_LEN_USED, port->bc_queue_len_used)) |
| goto nla_put_failure; |
| if (port->bc_cutoff != 1 && |
| nla_put_s32(skb, IFLA_MACVLAN_BC_CUTOFF, port->bc_cutoff)) |
| goto nla_put_failure; |
| 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 }, |
| [IFLA_MACVLAN_BC_QUEUE_LEN] = { .type = NLA_U32 }, |
| [IFLA_MACVLAN_BC_QUEUE_LEN_USED] = { .type = NLA_REJECT }, |
| [IFLA_MACVLAN_BC_CUTOFF] = { .type = NLA_S32 }, |
| }; |
| |
| int macvlan_link_register(struct rtnl_link_ops *ops) |
| { |
| /* common fields */ |
| 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, |
| .priv_size = sizeof(struct macvlan_dev), |
| }; |
| |
| static void update_port_bc_queue_len(struct macvlan_port *port) |
| { |
| u32 max_bc_queue_len_req = 0; |
| struct macvlan_dev *vlan; |
| |
| list_for_each_entry(vlan, &port->vlans, list) { |
| if (vlan->bc_queue_len_req > max_bc_queue_len_req) |
| max_bc_queue_len_req = vlan->bc_queue_len_req; |
| } |
| port->bc_queue_len_used = max_bc_queue_len_req; |
| } |
| |
| 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 (!netif_is_macvlan_port(dev)) |
| return NOTIFY_DONE; |
| |
| port = macvlan_port_get_rtnl(dev); |
| |
| switch (event) { |
| case NETDEV_UP: |
| case NETDEV_DOWN: |
| 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) { |
| netif_inherit_tso_max(vlan->dev, dev); |
| 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 (!macvlan_passthru(port)) |
| return NOTIFY_DONE; |
| |
| vlan = list_first_entry_or_null(&port->vlans, |
| struct macvlan_dev, |
| list); |
| |
| if (vlan && 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 underlying 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"); |