Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License as |
| 6 | * published by the Free Software Foundation; either version 2 of |
| 7 | * the License, or (at your option) any later version. |
| 8 | * |
| 9 | * The code this is based on carried the following copyright notice: |
| 10 | * --- |
| 11 | * (C) Copyright 2001-2006 |
| 12 | * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com |
| 13 | * Re-worked by Ben Greear <greearb@candelatech.com> |
| 14 | * --- |
| 15 | */ |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/types.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/string.h> |
Franck Bui-Huu | 8252474 | 2008-05-12 21:21:05 +0200 | [diff] [blame] | 23 | #include <linux/rculist.h> |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 24 | #include <linux/notifier.h> |
| 25 | #include <linux/netdevice.h> |
| 26 | #include <linux/etherdevice.h> |
| 27 | #include <linux/ethtool.h> |
| 28 | #include <linux/if_arp.h> |
| 29 | #include <linux/if_link.h> |
| 30 | #include <linux/if_macvlan.h> |
| 31 | #include <net/rtnetlink.h> |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 32 | #include <net/xfrm.h> |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 33 | |
| 34 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) |
| 35 | |
| 36 | struct macvlan_port { |
| 37 | struct net_device *dev; |
| 38 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; |
| 39 | struct list_head vlans; |
Jiri Pirko | 8b37ef0 | 2010-06-07 01:36:29 +0000 | [diff] [blame] | 40 | struct rcu_head rcu; |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 41 | bool passthru; |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 42 | int count; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 43 | }; |
| 44 | |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 45 | static void macvlan_port_destroy(struct net_device *dev); |
| 46 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 47 | #define macvlan_port_get_rcu(dev) \ |
| 48 | ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data)) |
| 49 | #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data) |
| 50 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
| 51 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 52 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
| 53 | const unsigned char *addr) |
| 54 | { |
| 55 | struct macvlan_dev *vlan; |
| 56 | struct hlist_node *n; |
| 57 | |
| 58 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { |
Eric Dumazet | ac06713 | 2009-09-01 05:46:05 +0000 | [diff] [blame] | 59 | if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr)) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 60 | return vlan; |
| 61 | } |
| 62 | return NULL; |
| 63 | } |
| 64 | |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 65 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
| 66 | { |
| 67 | struct macvlan_port *port = vlan->port; |
| 68 | const unsigned char *addr = vlan->dev->dev_addr; |
| 69 | |
| 70 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); |
| 71 | } |
| 72 | |
Eric Dumazet | 449f454 | 2011-05-19 12:24:16 +0000 | [diff] [blame] | 73 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 74 | { |
| 75 | hlist_del_rcu(&vlan->hlist); |
Eric Dumazet | 449f454 | 2011-05-19 12:24:16 +0000 | [diff] [blame] | 76 | if (sync) |
| 77 | synchronize_rcu(); |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, |
| 81 | const unsigned char *addr) |
| 82 | { |
Eric Dumazet | 449f454 | 2011-05-19 12:24:16 +0000 | [diff] [blame] | 83 | macvlan_hash_del(vlan, true); |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 84 | /* Now that we are unhashed it is safe to change the device |
| 85 | * address without confusing packet delivery. |
| 86 | */ |
| 87 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); |
| 88 | macvlan_hash_add(vlan); |
| 89 | } |
| 90 | |
| 91 | static int macvlan_addr_busy(const struct macvlan_port *port, |
| 92 | const unsigned char *addr) |
| 93 | { |
| 94 | /* Test to see if the specified multicast address is |
| 95 | * currently in use by the underlying device or |
| 96 | * another macvlan. |
| 97 | */ |
Eric Dumazet | ac06713 | 2009-09-01 05:46:05 +0000 | [diff] [blame] | 98 | if (!compare_ether_addr_64bits(port->dev->dev_addr, addr)) |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 99 | return 1; |
| 100 | |
| 101 | if (macvlan_hash_lookup(port, addr)) |
| 102 | return 1; |
| 103 | |
| 104 | return 0; |
| 105 | } |
| 106 | |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 107 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 108 | static int macvlan_broadcast_one(struct sk_buff *skb, |
| 109 | const struct macvlan_dev *vlan, |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 110 | const struct ethhdr *eth, bool local) |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 111 | { |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 112 | struct net_device *dev = vlan->dev; |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 113 | if (!skb) |
| 114 | return NET_RX_DROP; |
| 115 | |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 116 | if (local) |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 117 | return vlan->forward(dev, skb); |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 118 | |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 119 | skb->dev = dev; |
| 120 | if (!compare_ether_addr_64bits(eth->h_dest, |
| 121 | dev->broadcast)) |
| 122 | skb->pkt_type = PACKET_BROADCAST; |
| 123 | else |
| 124 | skb->pkt_type = PACKET_MULTICAST; |
| 125 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 126 | return vlan->receive(skb); |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 127 | } |
| 128 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 129 | static void macvlan_broadcast(struct sk_buff *skb, |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 130 | const struct macvlan_port *port, |
| 131 | struct net_device *src, |
| 132 | enum macvlan_mode mode) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 133 | { |
| 134 | const struct ethhdr *eth = eth_hdr(skb); |
| 135 | const struct macvlan_dev *vlan; |
| 136 | struct hlist_node *n; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 137 | struct sk_buff *nskb; |
| 138 | unsigned int i; |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 139 | int err; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 140 | |
Patrick McHardy | efbbced | 2008-11-26 15:30:48 -0800 | [diff] [blame] | 141 | if (skb->protocol == htons(ETH_P_PAUSE)) |
| 142 | return; |
| 143 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 144 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
| 145 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 146 | if (vlan->dev == src || !(vlan->mode & mode)) |
| 147 | continue; |
| 148 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 149 | nskb = skb_clone(skb, GFP_ATOMIC); |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 150 | err = macvlan_broadcast_one(nskb, vlan, eth, |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 151 | mode == MACVLAN_MODE_BRIDGE); |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 152 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
| 153 | err == NET_RX_SUCCESS, 1); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 154 | } |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /* called under rcu_read_lock() from netif_receive_skb */ |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 159 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 160 | { |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 161 | struct macvlan_port *port; |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 162 | struct sk_buff *skb = *pskb; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 163 | const struct ethhdr *eth = eth_hdr(skb); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 164 | const struct macvlan_dev *vlan; |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 165 | const struct macvlan_dev *src; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 166 | struct net_device *dev; |
Sridhar Samudrala | ba01877 | 2010-07-27 09:10:07 +0000 | [diff] [blame] | 167 | unsigned int len = 0; |
| 168 | int ret = NET_RX_DROP; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 169 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 170 | port = macvlan_port_get_rcu(skb->dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 171 | if (is_multicast_ether_addr(eth->h_dest)) { |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 172 | src = macvlan_hash_lookup(port, eth->h_source); |
| 173 | if (!src) |
| 174 | /* frame comes from an external address */ |
| 175 | macvlan_broadcast(skb, port, NULL, |
| 176 | MACVLAN_MODE_PRIVATE | |
| 177 | MACVLAN_MODE_VEPA | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 178 | MACVLAN_MODE_PASSTHRU| |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 179 | MACVLAN_MODE_BRIDGE); |
| 180 | else if (src->mode == MACVLAN_MODE_VEPA) |
| 181 | /* flood to everyone except source */ |
| 182 | macvlan_broadcast(skb, port, src->dev, |
| 183 | MACVLAN_MODE_VEPA | |
| 184 | MACVLAN_MODE_BRIDGE); |
| 185 | else if (src->mode == MACVLAN_MODE_BRIDGE) |
| 186 | /* |
| 187 | * flood only to VEPA ports, bridge ports |
| 188 | * already saw the frame on the way out. |
| 189 | */ |
| 190 | macvlan_broadcast(skb, port, src->dev, |
| 191 | MACVLAN_MODE_VEPA); |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 192 | return RX_HANDLER_PASS; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 193 | } |
| 194 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 195 | if (port->passthru) |
| 196 | vlan = list_first_entry(&port->vlans, struct macvlan_dev, list); |
| 197 | else |
| 198 | vlan = macvlan_hash_lookup(port, eth->h_dest); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 199 | if (vlan == NULL) |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 200 | return RX_HANDLER_PASS; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 201 | |
| 202 | dev = vlan->dev; |
| 203 | if (unlikely(!(dev->flags & IFF_UP))) { |
| 204 | kfree_skb(skb); |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 205 | return RX_HANDLER_CONSUMED; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 206 | } |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 207 | len = skb->len + ETH_HLEN; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 208 | skb = skb_share_check(skb, GFP_ATOMIC); |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 209 | if (!skb) |
Sridhar Samudrala | ba01877 | 2010-07-27 09:10:07 +0000 | [diff] [blame] | 210 | goto out; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 211 | |
| 212 | skb->dev = dev; |
| 213 | skb->pkt_type = PACKET_HOST; |
| 214 | |
Sridhar Samudrala | ba01877 | 2010-07-27 09:10:07 +0000 | [diff] [blame] | 215 | ret = vlan->receive(skb); |
| 216 | |
| 217 | out: |
| 218 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 219 | return RX_HANDLER_CONSUMED; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 220 | } |
| 221 | |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 222 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
| 223 | { |
| 224 | const struct macvlan_dev *vlan = netdev_priv(dev); |
| 225 | const struct macvlan_port *port = vlan->port; |
| 226 | const struct macvlan_dev *dest; |
Daniel Lezcano | 12a2856 | 2011-03-14 06:08:07 +0000 | [diff] [blame] | 227 | __u8 ip_summed = skb->ip_summed; |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 228 | |
| 229 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { |
| 230 | const struct ethhdr *eth = (void *)skb->data; |
Daniel Lezcano | 12a2856 | 2011-03-14 06:08:07 +0000 | [diff] [blame] | 231 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 232 | |
| 233 | /* send to other bridge ports directly */ |
| 234 | if (is_multicast_ether_addr(eth->h_dest)) { |
| 235 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); |
| 236 | goto xmit_world; |
| 237 | } |
| 238 | |
| 239 | dest = macvlan_hash_lookup(port, eth->h_dest); |
| 240 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { |
David Ward | a37dd33 | 2011-05-19 02:53:20 +0000 | [diff] [blame] | 241 | /* send to lowerdev first for its network taps */ |
| 242 | vlan->forward(vlan->lowerdev, skb); |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 243 | |
| 244 | return NET_XMIT_SUCCESS; |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | xmit_world: |
Daniel Lezcano | 12a2856 | 2011-03-14 06:08:07 +0000 | [diff] [blame] | 249 | skb->ip_summed = ip_summed; |
Arnd Bergmann | 8a83a00 | 2010-01-30 12:23:03 +0000 | [diff] [blame] | 250 | skb_set_dev(skb, vlan->lowerdev); |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 251 | return dev_queue_xmit(skb); |
| 252 | } |
| 253 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 254 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
| 255 | struct net_device *dev) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 256 | { |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 257 | unsigned int len = skb->len; |
| 258 | int ret; |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 259 | const struct macvlan_dev *vlan = netdev_priv(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 260 | |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 261 | ret = macvlan_queue_xmit(skb, dev); |
Eric Dumazet | 2d6c9ff | 2010-05-10 04:51:02 +0000 | [diff] [blame] | 262 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 263 | struct macvlan_pcpu_stats *pcpu_stats; |
Eric Dumazet | 2c11455 | 2009-09-03 00:11:45 +0000 | [diff] [blame] | 264 | |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 265 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
| 266 | u64_stats_update_begin(&pcpu_stats->syncp); |
| 267 | pcpu_stats->tx_packets++; |
| 268 | pcpu_stats->tx_bytes += len; |
| 269 | u64_stats_update_end(&pcpu_stats->syncp); |
| 270 | } else { |
| 271 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); |
| 272 | } |
Patrick McHardy | cbbef5e | 2009-11-10 06:14:24 +0000 | [diff] [blame] | 273 | return ret; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 274 | } |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 275 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 276 | |
| 277 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 278 | unsigned short type, const void *daddr, |
| 279 | const void *saddr, unsigned len) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 280 | { |
| 281 | const struct macvlan_dev *vlan = netdev_priv(dev); |
| 282 | struct net_device *lowerdev = vlan->lowerdev; |
| 283 | |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 284 | return dev_hard_header(skb, lowerdev, type, daddr, |
| 285 | saddr ? : dev->dev_addr, len); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 286 | } |
| 287 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 288 | static const struct header_ops macvlan_hard_header_ops = { |
| 289 | .create = macvlan_hard_header, |
| 290 | .rebuild = eth_rebuild_header, |
| 291 | .parse = eth_header_parse, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 292 | .cache = eth_header_cache, |
| 293 | .cache_update = eth_header_cache_update, |
| 294 | }; |
| 295 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 296 | static int macvlan_open(struct net_device *dev) |
| 297 | { |
| 298 | struct macvlan_dev *vlan = netdev_priv(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 299 | struct net_device *lowerdev = vlan->lowerdev; |
| 300 | int err; |
| 301 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 302 | if (vlan->port->passthru) { |
| 303 | dev_set_promiscuity(lowerdev, 1); |
| 304 | goto hash_add; |
| 305 | } |
| 306 | |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 307 | err = -EBUSY; |
| 308 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
| 309 | goto out; |
| 310 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 311 | err = dev_uc_add(lowerdev, dev->dev_addr); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 312 | if (err < 0) |
Wang Chen | b89fb7d | 2008-07-14 20:57:07 -0700 | [diff] [blame] | 313 | goto out; |
| 314 | if (dev->flags & IFF_ALLMULTI) { |
| 315 | err = dev_set_allmulti(lowerdev, 1); |
| 316 | if (err < 0) |
| 317 | goto del_unicast; |
| 318 | } |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 319 | |
| 320 | hash_add: |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 321 | macvlan_hash_add(vlan); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 322 | return 0; |
Wang Chen | b89fb7d | 2008-07-14 20:57:07 -0700 | [diff] [blame] | 323 | |
| 324 | del_unicast: |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 325 | dev_uc_del(lowerdev, dev->dev_addr); |
Wang Chen | b89fb7d | 2008-07-14 20:57:07 -0700 | [diff] [blame] | 326 | out: |
| 327 | return err; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | static int macvlan_stop(struct net_device *dev) |
| 331 | { |
| 332 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 333 | struct net_device *lowerdev = vlan->lowerdev; |
| 334 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 335 | if (vlan->port->passthru) { |
| 336 | dev_set_promiscuity(lowerdev, -1); |
| 337 | goto hash_del; |
| 338 | } |
| 339 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 340 | dev_mc_unsync(lowerdev, dev); |
| 341 | if (dev->flags & IFF_ALLMULTI) |
| 342 | dev_set_allmulti(lowerdev, -1); |
| 343 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 344 | dev_uc_del(lowerdev, dev->dev_addr); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 345 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 346 | hash_del: |
Eric Dumazet | 449f454 | 2011-05-19 12:24:16 +0000 | [diff] [blame] | 347 | macvlan_hash_del(vlan, !dev->dismantle); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 348 | return 0; |
| 349 | } |
| 350 | |
Patrick McHardy | ad5d20a | 2007-11-19 22:00:42 -0800 | [diff] [blame] | 351 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
| 352 | { |
| 353 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 354 | struct net_device *lowerdev = vlan->lowerdev; |
| 355 | struct sockaddr *addr = p; |
| 356 | int err; |
| 357 | |
| 358 | if (!is_valid_ether_addr(addr->sa_data)) |
| 359 | return -EADDRNOTAVAIL; |
| 360 | |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 361 | if (!(dev->flags & IFF_UP)) { |
| 362 | /* Just copy in the new address */ |
| 363 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
| 364 | } else { |
| 365 | /* Rehash and update the device filters */ |
| 366 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
| 367 | return -EBUSY; |
Patrick McHardy | ad5d20a | 2007-11-19 22:00:42 -0800 | [diff] [blame] | 368 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 369 | err = dev_uc_add(lowerdev, addr->sa_data); |
Jiri Pirko | ccffad2 | 2009-05-22 23:22:17 +0000 | [diff] [blame] | 370 | if (err) |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 371 | return err; |
Patrick McHardy | ad5d20a | 2007-11-19 22:00:42 -0800 | [diff] [blame] | 372 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 373 | dev_uc_del(lowerdev, dev->dev_addr); |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 374 | |
| 375 | macvlan_hash_change_addr(vlan, addr->sa_data); |
| 376 | } |
Patrick McHardy | ad5d20a | 2007-11-19 22:00:42 -0800 | [diff] [blame] | 377 | return 0; |
| 378 | } |
| 379 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 380 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
| 381 | { |
| 382 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 383 | struct net_device *lowerdev = vlan->lowerdev; |
| 384 | |
| 385 | if (change & IFF_ALLMULTI) |
| 386 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); |
| 387 | } |
| 388 | |
| 389 | static void macvlan_set_multicast_list(struct net_device *dev) |
| 390 | { |
| 391 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 392 | |
| 393 | dev_mc_sync(vlan->lowerdev, dev); |
| 394 | } |
| 395 | |
| 396 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) |
| 397 | { |
| 398 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 399 | |
| 400 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) |
| 401 | return -EINVAL; |
| 402 | dev->mtu = new_mtu; |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | /* |
| 407 | * macvlan network devices have devices nesting below it and are a special |
| 408 | * "super class" of normal network devices; split their locks off into a |
| 409 | * separate class since they always nest. |
| 410 | */ |
| 411 | static struct lock_class_key macvlan_netdev_xmit_lock_key; |
David S. Miller | cf508b1 | 2008-07-22 14:16:42 -0700 | [diff] [blame] | 412 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 413 | |
| 414 | #define MACVLAN_FEATURES \ |
| 415 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
| 416 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 417 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
| 418 | NETIF_F_HW_VLAN_FILTER) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 419 | |
| 420 | #define MACVLAN_STATE_MASK \ |
| 421 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) |
| 422 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 423 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
| 424 | struct netdev_queue *txq, |
| 425 | void *_unused) |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 426 | { |
| 427 | lockdep_set_class(&txq->_xmit_lock, |
| 428 | &macvlan_netdev_xmit_lock_key); |
| 429 | } |
| 430 | |
| 431 | static void macvlan_set_lockdep_class(struct net_device *dev) |
| 432 | { |
David S. Miller | cf508b1 | 2008-07-22 14:16:42 -0700 | [diff] [blame] | 433 | lockdep_set_class(&dev->addr_list_lock, |
| 434 | &macvlan_netdev_addr_lock_key); |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 435 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 436 | } |
| 437 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 438 | static int macvlan_init(struct net_device *dev) |
| 439 | { |
| 440 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 441 | const struct net_device *lowerdev = vlan->lowerdev; |
| 442 | |
| 443 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | |
| 444 | (lowerdev->state & MACVLAN_STATE_MASK); |
| 445 | dev->features = lowerdev->features & MACVLAN_FEATURES; |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 446 | dev->features |= NETIF_F_LLTX; |
Patrick McHardy | 8c2acc5 | 2009-11-23 14:18:53 -0800 | [diff] [blame] | 447 | dev->gso_max_size = lowerdev->gso_max_size; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 448 | dev->iflink = lowerdev->ifindex; |
sg.tweak@gmail.com | ef5c899 | 2009-06-10 09:55:02 +0000 | [diff] [blame] | 449 | dev->hard_header_len = lowerdev->hard_header_len; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 450 | |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 451 | macvlan_set_lockdep_class(dev); |
| 452 | |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 453 | vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); |
| 454 | if (!vlan->pcpu_stats) |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 455 | return -ENOMEM; |
| 456 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 457 | return 0; |
| 458 | } |
| 459 | |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 460 | static void macvlan_uninit(struct net_device *dev) |
| 461 | { |
| 462 | struct macvlan_dev *vlan = netdev_priv(dev); |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 463 | struct macvlan_port *port = vlan->port; |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 464 | |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 465 | free_percpu(vlan->pcpu_stats); |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 466 | |
| 467 | port->count -= 1; |
| 468 | if (!port->count) |
| 469 | macvlan_port_destroy(port->dev); |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 470 | } |
| 471 | |
Eric Dumazet | 2817273 | 2010-07-07 14:58:56 -0700 | [diff] [blame] | 472 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
| 473 | struct rtnl_link_stats64 *stats) |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 474 | { |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 475 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 476 | |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 477 | if (vlan->pcpu_stats) { |
| 478 | struct macvlan_pcpu_stats *p; |
| 479 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
| 480 | u32 rx_errors = 0, tx_dropped = 0; |
Eric Dumazet | bc66154 | 2010-06-24 00:54:21 +0000 | [diff] [blame] | 481 | unsigned int start; |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 482 | int i; |
| 483 | |
| 484 | for_each_possible_cpu(i) { |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 485 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
Eric Dumazet | bc66154 | 2010-06-24 00:54:21 +0000 | [diff] [blame] | 486 | do { |
| 487 | start = u64_stats_fetch_begin_bh(&p->syncp); |
| 488 | rx_packets = p->rx_packets; |
| 489 | rx_bytes = p->rx_bytes; |
| 490 | rx_multicast = p->rx_multicast; |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 491 | tx_packets = p->tx_packets; |
| 492 | tx_bytes = p->tx_bytes; |
Eric Dumazet | bc66154 | 2010-06-24 00:54:21 +0000 | [diff] [blame] | 493 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 494 | |
| 495 | stats->rx_packets += rx_packets; |
| 496 | stats->rx_bytes += rx_bytes; |
| 497 | stats->multicast += rx_multicast; |
| 498 | stats->tx_packets += tx_packets; |
| 499 | stats->tx_bytes += tx_bytes; |
| 500 | /* rx_errors & tx_dropped are u32, updated |
| 501 | * without syncp protection. |
| 502 | */ |
| 503 | rx_errors += p->rx_errors; |
| 504 | tx_dropped += p->tx_dropped; |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 505 | } |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 506 | stats->rx_errors = rx_errors; |
| 507 | stats->rx_dropped = rx_errors; |
| 508 | stats->tx_dropped = tx_dropped; |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 509 | } |
| 510 | return stats; |
| 511 | } |
| 512 | |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 513 | static void macvlan_vlan_rx_add_vid(struct net_device *dev, |
| 514 | unsigned short vid) |
| 515 | { |
| 516 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 517 | struct net_device *lowerdev = vlan->lowerdev; |
| 518 | const struct net_device_ops *ops = lowerdev->netdev_ops; |
| 519 | |
| 520 | if (ops->ndo_vlan_rx_add_vid) |
| 521 | ops->ndo_vlan_rx_add_vid(lowerdev, vid); |
| 522 | } |
| 523 | |
| 524 | static void macvlan_vlan_rx_kill_vid(struct net_device *dev, |
| 525 | unsigned short vid) |
| 526 | { |
| 527 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 528 | struct net_device *lowerdev = vlan->lowerdev; |
| 529 | const struct net_device_ops *ops = lowerdev->netdev_ops; |
| 530 | |
| 531 | if (ops->ndo_vlan_rx_kill_vid) |
| 532 | ops->ndo_vlan_rx_kill_vid(lowerdev, vid); |
| 533 | } |
| 534 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 535 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
| 536 | struct ethtool_drvinfo *drvinfo) |
| 537 | { |
| 538 | snprintf(drvinfo->driver, 32, "macvlan"); |
| 539 | snprintf(drvinfo->version, 32, "0.1"); |
| 540 | } |
| 541 | |
Stephen Hemminger | 9edb8bb | 2008-10-29 15:31:53 -0700 | [diff] [blame] | 542 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
| 543 | struct ethtool_cmd *cmd) |
| 544 | { |
| 545 | const struct macvlan_dev *vlan = netdev_priv(dev); |
Patrick McHardy | b1b67dd | 2009-04-20 04:49:28 +0000 | [diff] [blame] | 546 | return dev_ethtool_get_settings(vlan->lowerdev, cmd); |
Stephen Hemminger | 9edb8bb | 2008-10-29 15:31:53 -0700 | [diff] [blame] | 547 | } |
| 548 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 549 | static const struct ethtool_ops macvlan_ethtool_ops = { |
| 550 | .get_link = ethtool_op_get_link, |
Stephen Hemminger | 9edb8bb | 2008-10-29 15:31:53 -0700 | [diff] [blame] | 551 | .get_settings = macvlan_ethtool_get_settings, |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 552 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
| 553 | }; |
| 554 | |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 555 | static const struct net_device_ops macvlan_netdev_ops = { |
| 556 | .ndo_init = macvlan_init, |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 557 | .ndo_uninit = macvlan_uninit, |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 558 | .ndo_open = macvlan_open, |
| 559 | .ndo_stop = macvlan_stop, |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 560 | .ndo_start_xmit = macvlan_start_xmit, |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 561 | .ndo_change_mtu = macvlan_change_mtu, |
| 562 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
| 563 | .ndo_set_mac_address = macvlan_set_mac_address, |
| 564 | .ndo_set_multicast_list = macvlan_set_multicast_list, |
Eric Dumazet | bc66154 | 2010-06-24 00:54:21 +0000 | [diff] [blame] | 565 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 566 | .ndo_validate_addr = eth_validate_addr, |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 567 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
| 568 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 569 | }; |
| 570 | |
Herbert Xu | 8a35747 | 2010-07-21 21:44:31 +0000 | [diff] [blame] | 571 | void macvlan_common_setup(struct net_device *dev) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 572 | { |
| 573 | ether_setup(dev); |
| 574 | |
Eric Dumazet | 93f154b | 2009-05-18 22:19:19 -0700 | [diff] [blame] | 575 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 576 | dev->netdev_ops = &macvlan_netdev_ops; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 577 | dev->destructor = free_netdev; |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 578 | dev->header_ops = &macvlan_hard_header_ops, |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 579 | dev->ethtool_ops = &macvlan_ethtool_ops; |
Herbert Xu | 8a35747 | 2010-07-21 21:44:31 +0000 | [diff] [blame] | 580 | } |
| 581 | EXPORT_SYMBOL_GPL(macvlan_common_setup); |
| 582 | |
| 583 | static void macvlan_setup(struct net_device *dev) |
| 584 | { |
| 585 | macvlan_common_setup(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 586 | dev->tx_queue_len = 0; |
| 587 | } |
| 588 | |
| 589 | static int macvlan_port_create(struct net_device *dev) |
| 590 | { |
| 591 | struct macvlan_port *port; |
| 592 | unsigned int i; |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 593 | int err; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 594 | |
| 595 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) |
| 596 | return -EINVAL; |
| 597 | |
| 598 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
| 599 | if (port == NULL) |
| 600 | return -ENOMEM; |
| 601 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 602 | port->passthru = false; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 603 | port->dev = dev; |
| 604 | INIT_LIST_HEAD(&port->vlans); |
| 605 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
| 606 | INIT_HLIST_HEAD(&port->vlan_hash[i]); |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 607 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 608 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
| 609 | if (err) |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 610 | kfree(port); |
Eric Dumazet | d935156 | 2011-05-20 14:59:23 -0400 | [diff] [blame] | 611 | else |
| 612 | dev->priv_flags |= IFF_MACVLAN_PORT; |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 613 | return err; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 614 | } |
| 615 | |
| 616 | static void macvlan_port_destroy(struct net_device *dev) |
| 617 | { |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 618 | struct macvlan_port *port = macvlan_port_get(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 619 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 620 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 621 | netdev_rx_handler_unregister(dev); |
Lai Jiangshan | 6e070ae | 2011-03-18 12:00:07 +0800 | [diff] [blame] | 622 | kfree_rcu(port, rcu); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 623 | } |
| 624 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 625 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
| 626 | { |
| 627 | if (tb[IFLA_ADDRESS]) { |
| 628 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) |
| 629 | return -EINVAL; |
| 630 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) |
| 631 | return -EADDRNOTAVAIL; |
| 632 | } |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 633 | |
| 634 | if (data && data[IFLA_MACVLAN_MODE]) { |
| 635 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { |
| 636 | case MACVLAN_MODE_PRIVATE: |
| 637 | case MACVLAN_MODE_VEPA: |
| 638 | case MACVLAN_MODE_BRIDGE: |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 639 | case MACVLAN_MODE_PASSTHRU: |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 640 | break; |
| 641 | default: |
| 642 | return -EINVAL; |
| 643 | } |
| 644 | } |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 645 | return 0; |
| 646 | } |
| 647 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 648 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
| 649 | struct nlattr *tb[], struct nlattr *data[], |
| 650 | int (*receive)(struct sk_buff *skb), |
| 651 | int (*forward)(struct net_device *dev, |
| 652 | struct sk_buff *skb)) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 653 | { |
| 654 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 655 | struct macvlan_port *port; |
| 656 | struct net_device *lowerdev; |
| 657 | int err; |
| 658 | |
| 659 | if (!tb[IFLA_LINK]) |
| 660 | return -EINVAL; |
| 661 | |
Eric W. Biederman | 81adee4 | 2009-11-08 00:53:51 -0800 | [diff] [blame] | 662 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 663 | if (lowerdev == NULL) |
| 664 | return -ENODEV; |
| 665 | |
Eric Biederman | b0832a2 | 2009-03-13 13:15:37 -0700 | [diff] [blame] | 666 | /* When creating macvlans on top of other macvlans - use |
| 667 | * the real device as the lowerdev. |
Patrick McHardy | a6ca5f1 | 2008-01-10 22:39:28 -0800 | [diff] [blame] | 668 | */ |
Eric Biederman | b0832a2 | 2009-03-13 13:15:37 -0700 | [diff] [blame] | 669 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
| 670 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); |
| 671 | lowerdev = lowervlan->lowerdev; |
| 672 | } |
Patrick McHardy | a6ca5f1 | 2008-01-10 22:39:28 -0800 | [diff] [blame] | 673 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 674 | if (!tb[IFLA_MTU]) |
| 675 | dev->mtu = lowerdev->mtu; |
| 676 | else if (dev->mtu > lowerdev->mtu) |
| 677 | return -EINVAL; |
| 678 | |
| 679 | if (!tb[IFLA_ADDRESS]) |
| 680 | random_ether_addr(dev->dev_addr); |
| 681 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 682 | if (!macvlan_port_exists(lowerdev)) { |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 683 | err = macvlan_port_create(lowerdev); |
| 684 | if (err < 0) |
| 685 | return err; |
| 686 | } |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 687 | port = macvlan_port_get(lowerdev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 688 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 689 | /* Only 1 macvlan device can be created in passthru mode */ |
| 690 | if (port->passthru) |
| 691 | return -EINVAL; |
| 692 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 693 | vlan->lowerdev = lowerdev; |
| 694 | vlan->dev = dev; |
| 695 | vlan->port = port; |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 696 | vlan->receive = receive; |
| 697 | vlan->forward = forward; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 698 | |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 699 | vlan->mode = MACVLAN_MODE_VEPA; |
| 700 | if (data && data[IFLA_MACVLAN_MODE]) |
| 701 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); |
| 702 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 703 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 704 | if (port->count) |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 705 | return -EINVAL; |
| 706 | port->passthru = true; |
| 707 | memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN); |
| 708 | } |
| 709 | |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 710 | port->count += 1; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 711 | err = register_netdevice(dev); |
| 712 | if (err < 0) |
Jiri Pirko | f16d3d5 | 2010-05-24 07:02:25 +0000 | [diff] [blame] | 713 | goto destroy_port; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 714 | |
| 715 | list_add_tail(&vlan->list, &port->vlans); |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 716 | netif_stacked_transfer_operstate(lowerdev, dev); |
Jiri Pirko | f16d3d5 | 2010-05-24 07:02:25 +0000 | [diff] [blame] | 717 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 718 | return 0; |
Jiri Pirko | f16d3d5 | 2010-05-24 07:02:25 +0000 | [diff] [blame] | 719 | |
| 720 | destroy_port: |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 721 | port->count -= 1; |
| 722 | if (!port->count) |
Jiri Pirko | f16d3d5 | 2010-05-24 07:02:25 +0000 | [diff] [blame] | 723 | macvlan_port_destroy(lowerdev); |
| 724 | |
| 725 | return err; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 726 | } |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 727 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 728 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 729 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
| 730 | struct nlattr *tb[], struct nlattr *data[]) |
| 731 | { |
| 732 | return macvlan_common_newlink(src_net, dev, tb, data, |
| 733 | netif_rx, |
| 734 | dev_forward_skb); |
| 735 | } |
| 736 | |
| 737 | void macvlan_dellink(struct net_device *dev, struct list_head *head) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 738 | { |
| 739 | struct macvlan_dev *vlan = netdev_priv(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 740 | |
| 741 | list_del(&vlan->list); |
Eric Dumazet | 23289a3 | 2009-10-27 07:06:36 +0000 | [diff] [blame] | 742 | unregister_netdevice_queue(dev, head); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 743 | } |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 744 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 745 | |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 746 | static int macvlan_changelink(struct net_device *dev, |
| 747 | struct nlattr *tb[], struct nlattr *data[]) |
| 748 | { |
| 749 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 750 | if (data && data[IFLA_MACVLAN_MODE]) |
| 751 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); |
| 752 | return 0; |
| 753 | } |
| 754 | |
| 755 | static size_t macvlan_get_size(const struct net_device *dev) |
| 756 | { |
| 757 | return nla_total_size(4); |
| 758 | } |
| 759 | |
| 760 | static int macvlan_fill_info(struct sk_buff *skb, |
| 761 | const struct net_device *dev) |
| 762 | { |
| 763 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 764 | |
| 765 | NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); |
| 766 | return 0; |
| 767 | |
| 768 | nla_put_failure: |
| 769 | return -EMSGSIZE; |
| 770 | } |
| 771 | |
| 772 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { |
| 773 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
| 774 | }; |
| 775 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 776 | int macvlan_link_register(struct rtnl_link_ops *ops) |
| 777 | { |
| 778 | /* common fields */ |
| 779 | ops->priv_size = sizeof(struct macvlan_dev); |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 780 | ops->validate = macvlan_validate; |
| 781 | ops->maxtype = IFLA_MACVLAN_MAX; |
| 782 | ops->policy = macvlan_policy; |
| 783 | ops->changelink = macvlan_changelink; |
| 784 | ops->get_size = macvlan_get_size; |
| 785 | ops->fill_info = macvlan_fill_info; |
| 786 | |
| 787 | return rtnl_link_register(ops); |
| 788 | }; |
| 789 | EXPORT_SYMBOL_GPL(macvlan_link_register); |
| 790 | |
| 791 | static struct rtnl_link_ops macvlan_link_ops = { |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 792 | .kind = "macvlan", |
Herbert Xu | 8a35747 | 2010-07-21 21:44:31 +0000 | [diff] [blame] | 793 | .setup = macvlan_setup, |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 794 | .newlink = macvlan_newlink, |
| 795 | .dellink = macvlan_dellink, |
| 796 | }; |
| 797 | |
| 798 | static int macvlan_device_event(struct notifier_block *unused, |
| 799 | unsigned long event, void *ptr) |
| 800 | { |
| 801 | struct net_device *dev = ptr; |
| 802 | struct macvlan_dev *vlan, *next; |
| 803 | struct macvlan_port *port; |
Eric Dumazet | 226bd34 | 2011-05-08 23:17:57 +0000 | [diff] [blame] | 804 | LIST_HEAD(list_kill); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 805 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 806 | if (!macvlan_port_exists(dev)) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 807 | return NOTIFY_DONE; |
| 808 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 809 | port = macvlan_port_get(dev); |
| 810 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 811 | switch (event) { |
| 812 | case NETDEV_CHANGE: |
| 813 | list_for_each_entry(vlan, &port->vlans, list) |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 814 | netif_stacked_transfer_operstate(vlan->lowerdev, |
| 815 | vlan->dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 816 | break; |
| 817 | case NETDEV_FEAT_CHANGE: |
| 818 | list_for_each_entry(vlan, &port->vlans, list) { |
| 819 | vlan->dev->features = dev->features & MACVLAN_FEATURES; |
Patrick McHardy | 8c2acc5 | 2009-11-23 14:18:53 -0800 | [diff] [blame] | 820 | vlan->dev->gso_max_size = dev->gso_max_size; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 821 | netdev_features_change(vlan->dev); |
| 822 | } |
| 823 | break; |
| 824 | case NETDEV_UNREGISTER: |
David Lamparter | 3b27e10 | 2010-09-17 03:22:19 +0000 | [diff] [blame] | 825 | /* twiddle thumbs on netns device moves */ |
| 826 | if (dev->reg_state != NETREG_UNREGISTERING) |
| 827 | break; |
| 828 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 829 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
Eric Dumazet | 226bd34 | 2011-05-08 23:17:57 +0000 | [diff] [blame] | 830 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
| 831 | unregister_netdevice_many(&list_kill); |
| 832 | list_del(&list_kill); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 833 | break; |
Jiri Pirko | 1c01fe1 | 2010-03-10 10:30:19 +0000 | [diff] [blame] | 834 | case NETDEV_PRE_TYPE_CHANGE: |
| 835 | /* Forbid underlaying device to change its type. */ |
| 836 | return NOTIFY_BAD; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 837 | } |
| 838 | return NOTIFY_DONE; |
| 839 | } |
| 840 | |
| 841 | static struct notifier_block macvlan_notifier_block __read_mostly = { |
| 842 | .notifier_call = macvlan_device_event, |
| 843 | }; |
| 844 | |
| 845 | static int __init macvlan_init_module(void) |
| 846 | { |
| 847 | int err; |
| 848 | |
| 849 | register_netdevice_notifier(&macvlan_notifier_block); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 850 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 851 | err = macvlan_link_register(&macvlan_link_ops); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 852 | if (err < 0) |
| 853 | goto err1; |
| 854 | return 0; |
| 855 | err1: |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 856 | unregister_netdevice_notifier(&macvlan_notifier_block); |
| 857 | return err; |
| 858 | } |
| 859 | |
| 860 | static void __exit macvlan_cleanup_module(void) |
| 861 | { |
| 862 | rtnl_link_unregister(&macvlan_link_ops); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 863 | unregister_netdevice_notifier(&macvlan_notifier_block); |
| 864 | } |
| 865 | |
| 866 | module_init(macvlan_init_module); |
| 867 | module_exit(macvlan_cleanup_module); |
| 868 | |
| 869 | MODULE_LICENSE("GPL"); |
| 870 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| 871 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); |
| 872 | MODULE_ALIAS_RTNL_LINK("macvlan"); |