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drivers/net/macvlan.c
22.1 KB
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/* * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> * * 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 <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> |
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#include <linux/rculist.h> |
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#include <linux/notifier.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/ethtool.h> #include <linux/if_arp.h> |
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#include <linux/if_vlan.h> |
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#include <linux/if_link.h> #include <linux/if_macvlan.h> #include <net/rtnetlink.h> |
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#include <net/xfrm.h> |
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#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) struct macvlan_port { struct net_device *dev; struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; struct list_head vlans; |
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struct rcu_head rcu; |
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bool passthru; |
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int count; |
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}; |
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static void macvlan_port_destroy(struct net_device *dev); |
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#define macvlan_port_get_rcu(dev) \ ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data)) #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data) #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
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static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, const unsigned char *addr) { struct macvlan_dev *vlan; struct hlist_node *n; hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { |
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if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr)) |
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return vlan; } return NULL; } |
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static void macvlan_hash_add(struct macvlan_dev *vlan) { struct macvlan_port *port = vlan->port; const unsigned char *addr = vlan->dev->dev_addr; hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); } |
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static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
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{ hlist_del_rcu(&vlan->hlist); |
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if (sync) synchronize_rcu(); |
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} static void macvlan_hash_change_addr(struct macvlan_dev *vlan, const unsigned char *addr) { |
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macvlan_hash_del(vlan, true); |
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/* Now that we are unhashed it is safe to change the device * 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. */ |
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if (!compare_ether_addr_64bits(port->dev->dev_addr, addr)) |
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return 1; if (macvlan_hash_lookup(port, addr)) return 1; return 0; } |
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|
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static int macvlan_broadcast_one(struct sk_buff *skb, const struct macvlan_dev *vlan, |
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const struct ethhdr *eth, bool local) |
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{ |
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struct net_device *dev = vlan->dev; |
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if (!skb) return NET_RX_DROP; |
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if (local) |
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return vlan->forward(dev, skb); |
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|
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skb->dev = dev; if (!compare_ether_addr_64bits(eth->h_dest, dev->broadcast)) skb->pkt_type = PACKET_BROADCAST; else skb->pkt_type = PACKET_MULTICAST; |
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return vlan->receive(skb); |
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} |
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static void macvlan_broadcast(struct sk_buff *skb, |
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const struct macvlan_port *port, struct net_device *src, enum macvlan_mode mode) |
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{ const struct ethhdr *eth = eth_hdr(skb); const struct macvlan_dev *vlan; struct hlist_node *n; |
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struct sk_buff *nskb; unsigned int i; |
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int err; |
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|
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if (skb->protocol == htons(ETH_P_PAUSE)) return; |
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for (i = 0; i < MACVLAN_HASH_SIZE; i++) { hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { |
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if (vlan->dev == src || !(vlan->mode & mode)) continue; |
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nskb = skb_clone(skb, GFP_ATOMIC); |
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err = macvlan_broadcast_one(nskb, vlan, eth, |
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mode == MACVLAN_MODE_BRIDGE); |
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macvlan_count_rx(vlan, skb->len + ETH_HLEN, err == NET_RX_SUCCESS, 1); |
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} } } /* called under rcu_read_lock() from netif_receive_skb */ |
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static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) |
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{ |
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struct macvlan_port *port; |
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struct sk_buff *skb = *pskb; |
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const struct ethhdr *eth = eth_hdr(skb); |
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const struct macvlan_dev *vlan; |
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const struct macvlan_dev *src; |
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struct net_device *dev; |
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unsigned int len = 0; int ret = NET_RX_DROP; |
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|
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port = macvlan_port_get_rcu(skb->dev); |
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if (is_multicast_ether_addr(eth->h_dest)) { |
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skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); if (!skb) return RX_HANDLER_CONSUMED; |
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src = macvlan_hash_lookup(port, eth->h_source); if (!src) /* frame comes from an external address */ macvlan_broadcast(skb, port, NULL, MACVLAN_MODE_PRIVATE | MACVLAN_MODE_VEPA | |
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MACVLAN_MODE_PASSTHRU| |
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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 if (src->mode == MACVLAN_MODE_BRIDGE) /* * flood only to VEPA ports, bridge ports * already saw the frame on the way out. */ macvlan_broadcast(skb, port, src->dev, MACVLAN_MODE_VEPA); |
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else { /* forward to original port. */ vlan = src; ret = macvlan_broadcast_one(skb, vlan, eth, 0); goto out; } |
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return RX_HANDLER_PASS; |
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} |
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if (port->passthru) vlan = list_first_entry(&port->vlans, struct macvlan_dev, list); else vlan = macvlan_hash_lookup(port, eth->h_dest); |
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if (vlan == NULL) |
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return RX_HANDLER_PASS; |
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dev = vlan->dev; if (unlikely(!(dev->flags & IFF_UP))) { kfree_skb(skb); |
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return RX_HANDLER_CONSUMED; |
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} |
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len = skb->len + ETH_HLEN; |
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skb = skb_share_check(skb, GFP_ATOMIC); |
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if (!skb) |
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goto out; |
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skb->dev = dev; skb->pkt_type = PACKET_HOST; |
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ret = vlan->receive(skb); out: macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); |
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return RX_HANDLER_CONSUMED; |
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} |
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static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) { const struct macvlan_dev *vlan = netdev_priv(dev); const struct macvlan_port *port = vlan->port; const struct macvlan_dev *dest; |
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__u8 ip_summed = skb->ip_summed; |
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if (vlan->mode == MACVLAN_MODE_BRIDGE) { const struct ethhdr *eth = (void *)skb->data; |
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skb->ip_summed = CHECKSUM_UNNECESSARY; |
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/* send to other bridge ports directly */ 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) { |
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/* send to lowerdev first for its network taps */ |
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dev_forward_skb(vlan->lowerdev, skb); |
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return NET_XMIT_SUCCESS; } } xmit_world: |
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skb->ip_summed = ip_summed; |
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skb_set_dev(skb, vlan->lowerdev); |
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return dev_queue_xmit(skb); } |
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netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, struct net_device *dev) |
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{ |
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unsigned int len = skb->len; int ret; |
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const struct macvlan_dev *vlan = netdev_priv(dev); |
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|
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ret = macvlan_queue_xmit(skb, dev); |
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if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
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struct macvlan_pcpu_stats *pcpu_stats; |
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|
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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); } |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
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static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, |
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unsigned short type, const void *daddr, const void *saddr, unsigned len) |
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{ const struct macvlan_dev *vlan = netdev_priv(dev); struct net_device *lowerdev = vlan->lowerdev; |
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return dev_hard_header(skb, lowerdev, type, daddr, saddr ? : dev->dev_addr, len); |
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} |
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static const struct header_ops macvlan_hard_header_ops = { .create = macvlan_hard_header, .rebuild = eth_rebuild_header, .parse = eth_header_parse, |
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.cache = eth_header_cache, .cache_update = eth_header_cache_update, }; |
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static int macvlan_open(struct net_device *dev) { struct macvlan_dev *vlan = netdev_priv(dev); |
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struct net_device *lowerdev = vlan->lowerdev; int err; |
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if (vlan->port->passthru) { dev_set_promiscuity(lowerdev, 1); goto hash_add; } |
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err = -EBUSY; if (macvlan_addr_busy(vlan->port, dev->dev_addr)) goto out; |
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err = dev_uc_add(lowerdev, dev->dev_addr); |
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if (err < 0) |
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goto out; if (dev->flags & IFF_ALLMULTI) { err = dev_set_allmulti(lowerdev, 1); if (err < 0) goto del_unicast; } |
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hash_add: |
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macvlan_hash_add(vlan); |
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return 0; |
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del_unicast: |
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dev_uc_del(lowerdev, dev->dev_addr); |
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out: return err; |
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} static int macvlan_stop(struct net_device *dev) { struct macvlan_dev *vlan = netdev_priv(dev); struct net_device *lowerdev = vlan->lowerdev; |
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if (vlan->port->passthru) { dev_set_promiscuity(lowerdev, -1); goto hash_del; } |
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dev_mc_unsync(lowerdev, dev); if (dev->flags & IFF_ALLMULTI) dev_set_allmulti(lowerdev, -1); |
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dev_uc_del(lowerdev, dev->dev_addr); |
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|
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hash_del: |
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macvlan_hash_del(vlan, !dev->dismantle); |
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return 0; } |
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static int macvlan_set_mac_address(struct net_device *dev, void *p) { struct macvlan_dev *vlan = netdev_priv(dev); struct net_device *lowerdev = vlan->lowerdev; struct sockaddr *addr = p; int err; if (!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; |
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if (!(dev->flags & IFF_UP)) { /* Just copy in the new address */ memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); } else { /* Rehash and update the device filters */ if (macvlan_addr_busy(vlan->port, addr->sa_data)) return -EBUSY; |
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|
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err = dev_uc_add(lowerdev, addr->sa_data); |
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if (err) |
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return err; |
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|
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dev_uc_del(lowerdev, dev->dev_addr); |
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macvlan_hash_change_addr(vlan, addr->sa_data); } |
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return 0; } |
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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 (change & IFF_ALLMULTI) dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); } static void macvlan_set_multicast_list(struct net_device *dev) { struct macvlan_dev *vlan = netdev_priv(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; |
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static struct lock_class_key macvlan_netdev_addr_lock_key; |
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#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_GSO_ROBUST | \ |
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NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ NETIF_F_HW_VLAN_FILTER) |
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#define MACVLAN_STATE_MASK \ ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) |
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static void macvlan_set_lockdep_class_one(struct net_device *dev, struct netdev_queue *txq, void *_unused) |
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{ lockdep_set_class(&txq->_xmit_lock, &macvlan_netdev_xmit_lock_key); } static void macvlan_set_lockdep_class(struct net_device *dev) { |
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lockdep_set_class(&dev->addr_list_lock, &macvlan_netdev_addr_lock_key); |
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netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
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} |
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static int macvlan_init(struct net_device *dev) { 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; |
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dev->features |= NETIF_F_LLTX; |
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dev->gso_max_size = lowerdev->gso_max_size; |
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dev->iflink = lowerdev->ifindex; |
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dev->hard_header_len = lowerdev->hard_header_len; |
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|
c773e847e netdev: Move _xmi... |
432 |
macvlan_set_lockdep_class(dev); |
8ffab51b3 macvlan: lockless... |
433 434 |
vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); if (!vlan->pcpu_stats) |
fccaf7101 macvlan: Precise ... |
435 |
return -ENOMEM; |
b863ceb7d [NET]: Add macvla... |
436 437 |
return 0; } |
fccaf7101 macvlan: Precise ... |
438 439 440 |
static void macvlan_uninit(struct net_device *dev) { struct macvlan_dev *vlan = netdev_priv(dev); |
d5cd92448 macvlan: Fix use ... |
441 |
struct macvlan_port *port = vlan->port; |
fccaf7101 macvlan: Precise ... |
442 |
|
8ffab51b3 macvlan: lockless... |
443 |
free_percpu(vlan->pcpu_stats); |
d5cd92448 macvlan: Fix use ... |
444 445 446 447 |
port->count -= 1; if (!port->count) macvlan_port_destroy(port->dev); |
fccaf7101 macvlan: Precise ... |
448 |
} |
28172739f net: fix 64 bit c... |
449 450 |
static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
fccaf7101 macvlan: Precise ... |
451 |
{ |
fccaf7101 macvlan: Precise ... |
452 |
struct macvlan_dev *vlan = netdev_priv(dev); |
8ffab51b3 macvlan: lockless... |
453 454 455 456 |
if (vlan->pcpu_stats) { struct macvlan_pcpu_stats *p; u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; u32 rx_errors = 0, tx_dropped = 0; |
bc66154ef macvlan: 64 bit r... |
457 |
unsigned int start; |
fccaf7101 macvlan: Precise ... |
458 459 460 |
int i; for_each_possible_cpu(i) { |
8ffab51b3 macvlan: lockless... |
461 |
p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154ef macvlan: 64 bit r... |
462 463 464 465 466 |
do { start = u64_stats_fetch_begin_bh(&p->syncp); rx_packets = p->rx_packets; rx_bytes = p->rx_bytes; rx_multicast = p->rx_multicast; |
8ffab51b3 macvlan: lockless... |
467 468 |
tx_packets = p->tx_packets; tx_bytes = p->tx_bytes; |
bc66154ef macvlan: 64 bit r... |
469 |
} while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
8ffab51b3 macvlan: lockless... |
470 471 472 473 474 475 476 477 478 479 480 |
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; |
fccaf7101 macvlan: Precise ... |
481 |
} |
8ffab51b3 macvlan: lockless... |
482 483 484 |
stats->rx_errors = rx_errors; stats->rx_dropped = rx_errors; stats->tx_dropped = tx_dropped; |
fccaf7101 macvlan: Precise ... |
485 486 487 |
} return stats; } |
8e586137e net: make vlan nd... |
488 |
static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
8d13e670d macvlan: add VLAN... |
489 490 491 492 |
unsigned short vid) { struct macvlan_dev *vlan = netdev_priv(dev); struct net_device *lowerdev = vlan->lowerdev; |
8d13e670d macvlan: add VLAN... |
493 |
|
87002b03b net: introduce vl... |
494 |
return vlan_vid_add(lowerdev, vid); |
8d13e670d macvlan: add VLAN... |
495 |
} |
8e586137e net: make vlan nd... |
496 |
static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
8d13e670d macvlan: add VLAN... |
497 498 499 500 |
unsigned short vid) { struct macvlan_dev *vlan = netdev_priv(dev); struct net_device *lowerdev = vlan->lowerdev; |
8d13e670d macvlan: add VLAN... |
501 |
|
87002b03b net: introduce vl... |
502 |
vlan_vid_del(lowerdev, vid); |
8e586137e net: make vlan nd... |
503 |
return 0; |
8d13e670d macvlan: add VLAN... |
504 |
} |
b863ceb7d [NET]: Add macvla... |
505 506 507 508 509 510 |
static void macvlan_ethtool_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo) { snprintf(drvinfo->driver, 32, "macvlan"); snprintf(drvinfo->version, 32, "0.1"); } |
9edb8bb68 macvlan: add supp... |
511 512 513 514 |
static int macvlan_ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { const struct macvlan_dev *vlan = netdev_priv(dev); |
4bc71cb98 net: consolidate ... |
515 516 |
return __ethtool_get_settings(vlan->lowerdev, cmd); |
9edb8bb68 macvlan: add supp... |
517 |
} |
b863ceb7d [NET]: Add macvla... |
518 519 |
static const struct ethtool_ops macvlan_ethtool_ops = { .get_link = ethtool_op_get_link, |
9edb8bb68 macvlan: add supp... |
520 |
.get_settings = macvlan_ethtool_get_settings, |
b863ceb7d [NET]: Add macvla... |
521 522 |
.get_drvinfo = macvlan_ethtool_get_drvinfo, }; |
54a30c975 macvlan: convert ... |
523 524 |
static const struct net_device_ops macvlan_netdev_ops = { .ndo_init = macvlan_init, |
fccaf7101 macvlan: Precise ... |
525 |
.ndo_uninit = macvlan_uninit, |
54a30c975 macvlan: convert ... |
526 527 |
.ndo_open = macvlan_open, .ndo_stop = macvlan_stop, |
008298231 netdev: add more ... |
528 |
.ndo_start_xmit = macvlan_start_xmit, |
54a30c975 macvlan: convert ... |
529 530 531 |
.ndo_change_mtu = macvlan_change_mtu, .ndo_change_rx_flags = macvlan_change_rx_flags, .ndo_set_mac_address = macvlan_set_mac_address, |
afc4b13df net: remove use o... |
532 |
.ndo_set_rx_mode = macvlan_set_multicast_list, |
bc66154ef macvlan: 64 bit r... |
533 |
.ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c975 macvlan: convert ... |
534 |
.ndo_validate_addr = eth_validate_addr, |
8d13e670d macvlan: add VLAN... |
535 536 |
.ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, |
54a30c975 macvlan: convert ... |
537 |
}; |
8a35747a5 macvtap: Limit pa... |
538 |
void macvlan_common_setup(struct net_device *dev) |
b863ceb7d [NET]: Add macvla... |
539 540 |
{ ether_setup(dev); |
550fd08c2 net: Audit driver... |
541 |
dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
54a30c975 macvlan: convert ... |
542 |
dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7d [NET]: Add macvla... |
543 |
dev->destructor = free_netdev; |
3b04ddde0 [NET]: Move hardw... |
544 |
dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7d [NET]: Add macvla... |
545 |
dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a5 macvtap: Limit pa... |
546 547 548 549 550 551 |
} EXPORT_SYMBOL_GPL(macvlan_common_setup); static void macvlan_setup(struct net_device *dev) { macvlan_common_setup(dev); |
b863ceb7d [NET]: Add macvla... |
552 553 554 555 556 557 558 |
dev->tx_queue_len = 0; } static int macvlan_port_create(struct net_device *dev) { struct macvlan_port *port; unsigned int i; |
ab95bfe01 net: replace hook... |
559 |
int err; |
b863ceb7d [NET]: Add macvla... |
560 561 562 563 564 565 566 |
if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) return -EINVAL; port = kzalloc(sizeof(*port), GFP_KERNEL); if (port == NULL) return -ENOMEM; |
eb06acdc8 macvlan: Introduc... |
567 |
port->passthru = false; |
b863ceb7d [NET]: Add macvla... |
568 569 570 571 |
port->dev = dev; INIT_LIST_HEAD(&port->vlans); for (i = 0; i < MACVLAN_HASH_SIZE; i++) INIT_HLIST_HEAD(&port->vlan_hash[i]); |
ab95bfe01 net: replace hook... |
572 |
|
a35e2c1b6 macvlan: use rx_h... |
573 574 |
err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); if (err) |
ab95bfe01 net: replace hook... |
575 |
kfree(port); |
d93515611 macvlan: fix pani... |
576 577 |
else dev->priv_flags |= IFF_MACVLAN_PORT; |
ab95bfe01 net: replace hook... |
578 |
return err; |
b863ceb7d [NET]: Add macvla... |
579 580 581 582 |
} static void macvlan_port_destroy(struct net_device *dev) { |
a35e2c1b6 macvlan: use rx_h... |
583 |
struct macvlan_port *port = macvlan_port_get(dev); |
b863ceb7d [NET]: Add macvla... |
584 |
|
a35e2c1b6 macvlan: use rx_h... |
585 |
dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe01 net: replace hook... |
586 |
netdev_rx_handler_unregister(dev); |
6e070aecd macvlan,rcu: conv... |
587 |
kfree_rcu(port, rcu); |
b863ceb7d [NET]: Add macvla... |
588 |
} |
b863ceb7d [NET]: Add macvla... |
589 590 591 592 593 594 595 596 |
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; } |
27c0b1a85 macvlan: export m... |
597 598 599 600 601 602 |
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: |
eb06acdc8 macvlan: Introduc... |
603 |
case MACVLAN_MODE_PASSTHRU: |
27c0b1a85 macvlan: export m... |
604 605 606 607 608 |
break; default: return -EINVAL; } } |
b863ceb7d [NET]: Add macvla... |
609 610 |
return 0; } |
fc0663d6b macvlan: allow mu... |
611 612 613 614 615 |
int macvlan_common_newlink(struct net *src_net, struct net_device *dev, struct nlattr *tb[], struct nlattr *data[], int (*receive)(struct sk_buff *skb), int (*forward)(struct net_device *dev, struct sk_buff *skb)) |
b863ceb7d [NET]: Add macvla... |
616 617 618 619 620 621 622 623 |
{ struct macvlan_dev *vlan = netdev_priv(dev); struct macvlan_port *port; struct net_device *lowerdev; int err; if (!tb[IFLA_LINK]) return -EINVAL; |
81adee47d net: Support spec... |
624 |
lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7d [NET]: Add macvla... |
625 626 |
if (lowerdev == NULL) return -ENODEV; |
b0832a296 macvlan: Support ... |
627 628 |
/* When creating macvlans on top of other macvlans - use * the real device as the lowerdev. |
a6ca5f1db [MACVLAN]: Preven... |
629 |
*/ |
b0832a296 macvlan: Support ... |
630 631 632 633 |
if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { struct macvlan_dev *lowervlan = netdev_priv(lowerdev); lowerdev = lowervlan->lowerdev; } |
a6ca5f1db [MACVLAN]: Preven... |
634 |
|
b863ceb7d [NET]: Add macvla... |
635 636 637 638 639 640 641 |
if (!tb[IFLA_MTU]) dev->mtu = lowerdev->mtu; else if (dev->mtu > lowerdev->mtu) return -EINVAL; if (!tb[IFLA_ADDRESS]) random_ether_addr(dev->dev_addr); |
a35e2c1b6 macvlan: use rx_h... |
642 |
if (!macvlan_port_exists(lowerdev)) { |
b863ceb7d [NET]: Add macvla... |
643 644 645 646 |
err = macvlan_port_create(lowerdev); if (err < 0) return err; } |
a35e2c1b6 macvlan: use rx_h... |
647 |
port = macvlan_port_get(lowerdev); |
b863ceb7d [NET]: Add macvla... |
648 |
|
eb06acdc8 macvlan: Introduc... |
649 650 651 |
/* Only 1 macvlan device can be created in passthru mode */ if (port->passthru) return -EINVAL; |
b863ceb7d [NET]: Add macvla... |
652 653 654 |
vlan->lowerdev = lowerdev; vlan->dev = dev; vlan->port = port; |
fc0663d6b macvlan: allow mu... |
655 656 |
vlan->receive = receive; vlan->forward = forward; |
b863ceb7d [NET]: Add macvla... |
657 |
|
27c0b1a85 macvlan: export m... |
658 659 660 |
vlan->mode = MACVLAN_MODE_VEPA; if (data && data[IFLA_MACVLAN_MODE]) vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); |
eb06acdc8 macvlan: Introduc... |
661 |
if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
d5cd92448 macvlan: Fix use ... |
662 |
if (port->count) |
eb06acdc8 macvlan: Introduc... |
663 664 665 666 |
return -EINVAL; port->passthru = true; memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN); } |
d5cd92448 macvlan: Fix use ... |
667 |
port->count += 1; |
b863ceb7d [NET]: Add macvla... |
668 669 |
err = register_netdevice(dev); if (err < 0) |
f16d3d574 macvlan: do prope... |
670 |
goto destroy_port; |
b863ceb7d [NET]: Add macvla... |
671 672 |
list_add_tail(&vlan->list, &port->vlans); |
fc4a74896 netdevice: provid... |
673 |
netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d574 macvlan: do prope... |
674 |
|
b863ceb7d [NET]: Add macvla... |
675 |
return 0; |
f16d3d574 macvlan: do prope... |
676 677 |
destroy_port: |
d5cd92448 macvlan: Fix use ... |
678 679 |
port->count -= 1; if (!port->count) |
f16d3d574 macvlan: do prope... |
680 681 682 |
macvlan_port_destroy(lowerdev); return err; |
b863ceb7d [NET]: Add macvla... |
683 |
} |
fc0663d6b macvlan: allow mu... |
684 |
EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7d [NET]: Add macvla... |
685 |
|
fc0663d6b macvlan: allow mu... |
686 687 688 689 690 691 692 693 694 |
static int macvlan_newlink(struct net *src_net, struct net_device *dev, struct nlattr *tb[], struct nlattr *data[]) { return macvlan_common_newlink(src_net, dev, tb, data, netif_rx, dev_forward_skb); } void macvlan_dellink(struct net_device *dev, struct list_head *head) |
b863ceb7d [NET]: Add macvla... |
695 696 |
{ struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7d [NET]: Add macvla... |
697 698 |
list_del(&vlan->list); |
23289a37e net: add a list_h... |
699 |
unregister_netdevice_queue(dev, head); |
b863ceb7d [NET]: Add macvla... |
700 |
} |
fc0663d6b macvlan: allow mu... |
701 |
EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7d [NET]: Add macvla... |
702 |
|
27c0b1a85 macvlan: export m... |
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 |
static int macvlan_changelink(struct net_device *dev, struct nlattr *tb[], struct nlattr *data[]) { struct macvlan_dev *vlan = netdev_priv(dev); if (data && data[IFLA_MACVLAN_MODE]) vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); return 0; } static size_t macvlan_get_size(const struct net_device *dev) { return nla_total_size(4); } static int macvlan_fill_info(struct sk_buff *skb, const struct net_device *dev) { struct macvlan_dev *vlan = netdev_priv(dev); NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); return 0; nla_put_failure: return -EMSGSIZE; } static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, }; |
fc0663d6b macvlan: allow mu... |
732 733 734 735 |
int macvlan_link_register(struct rtnl_link_ops *ops) { /* common fields */ ops->priv_size = sizeof(struct macvlan_dev); |
fc0663d6b macvlan: allow mu... |
736 737 738 739 740 741 742 743 744 745 746 747 |
ops->validate = macvlan_validate; ops->maxtype = IFLA_MACVLAN_MAX; ops->policy = macvlan_policy; ops->changelink = macvlan_changelink; ops->get_size = macvlan_get_size; ops->fill_info = macvlan_fill_info; return rtnl_link_register(ops); }; EXPORT_SYMBOL_GPL(macvlan_link_register); static struct rtnl_link_ops macvlan_link_ops = { |
b863ceb7d [NET]: Add macvla... |
748 |
.kind = "macvlan", |
8a35747a5 macvtap: Limit pa... |
749 |
.setup = macvlan_setup, |
b863ceb7d [NET]: Add macvla... |
750 751 752 753 754 755 756 757 758 759 |
.newlink = macvlan_newlink, .dellink = macvlan_dellink, }; static int macvlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) { struct net_device *dev = ptr; struct macvlan_dev *vlan, *next; struct macvlan_port *port; |
226bd3411 net: use batched ... |
760 |
LIST_HEAD(list_kill); |
b863ceb7d [NET]: Add macvla... |
761 |
|
a35e2c1b6 macvlan: use rx_h... |
762 |
if (!macvlan_port_exists(dev)) |
b863ceb7d [NET]: Add macvla... |
763 |
return NOTIFY_DONE; |
a35e2c1b6 macvlan: use rx_h... |
764 |
port = macvlan_port_get(dev); |
b863ceb7d [NET]: Add macvla... |
765 766 767 |
switch (event) { case NETDEV_CHANGE: list_for_each_entry(vlan, &port->vlans, list) |
fc4a74896 netdevice: provid... |
768 769 |
netif_stacked_transfer_operstate(vlan->lowerdev, vlan->dev); |
b863ceb7d [NET]: Add macvla... |
770 771 772 773 |
break; case NETDEV_FEAT_CHANGE: list_for_each_entry(vlan, &port->vlans, list) { vlan->dev->features = dev->features & MACVLAN_FEATURES; |
8c2acc53f macvlan: fix gso_... |
774 |
vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7d [NET]: Add macvla... |
775 776 777 778 |
netdev_features_change(vlan->dev); } break; case NETDEV_UNREGISTER: |
3b27e1055 netns: keep vlan ... |
779 780 781 |
/* twiddle thumbs on netns device moves */ if (dev->reg_state != NETREG_UNREGISTERING) break; |
b863ceb7d [NET]: Add macvla... |
782 |
list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd3411 net: use batched ... |
783 784 785 |
vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); unregister_netdevice_many(&list_kill); list_del(&list_kill); |
b863ceb7d [NET]: Add macvla... |
786 |
break; |
1c01fe14a net: forbid under... |
787 788 789 |
case NETDEV_PRE_TYPE_CHANGE: /* Forbid underlaying device to change its type. */ return NOTIFY_BAD; |
b863ceb7d [NET]: Add macvla... |
790 791 792 793 794 795 796 797 798 799 800 801 802 |
} 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); |
b863ceb7d [NET]: Add macvla... |
803 |
|
fc0663d6b macvlan: allow mu... |
804 |
err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7d [NET]: Add macvla... |
805 806 807 808 |
if (err < 0) goto err1; return 0; err1: |
b863ceb7d [NET]: Add macvla... |
809 810 811 812 813 814 815 |
unregister_netdevice_notifier(&macvlan_notifier_block); return err; } static void __exit macvlan_cleanup_module(void) { rtnl_link_unregister(&macvlan_link_ops); |
b863ceb7d [NET]: Add macvla... |
816 817 818 819 820 821 822 823 824 825 |
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"); |