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> |
Jiri Pirko | 87002b0 | 2011-12-08 04:11:17 +0000 | [diff] [blame] | 29 | #include <linux/if_vlan.h> |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 30 | #include <linux/if_link.h> |
| 31 | #include <linux/if_macvlan.h> |
Eric Dumazet | cd431e7 | 2013-02-05 20:22:50 +0000 | [diff] [blame] | 32 | #include <linux/hash.h> |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 33 | #include <linux/workqueue.h> |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 34 | #include <net/rtnetlink.h> |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 35 | #include <net/xfrm.h> |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 36 | |
| 37 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) |
| 38 | |
| 39 | struct macvlan_port { |
| 40 | struct net_device *dev; |
| 41 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; |
| 42 | struct list_head vlans; |
Jiri Pirko | 8b37ef0 | 2010-06-07 01:36:29 +0000 | [diff] [blame] | 43 | struct rcu_head rcu; |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 44 | struct sk_buff_head bc_queue; |
| 45 | struct work_struct bc_work; |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 46 | bool passthru; |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 47 | int count; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 48 | }; |
| 49 | |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 50 | struct macvlan_skb_cb { |
| 51 | const struct macvlan_dev *src; |
| 52 | }; |
| 53 | |
| 54 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) |
| 55 | |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 56 | static void macvlan_port_destroy(struct net_device *dev); |
| 57 | |
Eric Dumazet | e052f7e | 2013-03-30 10:08:44 +0000 | [diff] [blame] | 58 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
| 59 | { |
| 60 | return rcu_dereference(dev->rx_handler_data); |
| 61 | } |
| 62 | |
| 63 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) |
| 64 | { |
| 65 | return rtnl_dereference(dev->rx_handler_data); |
| 66 | } |
| 67 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 68 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
| 69 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 70 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
| 71 | const unsigned char *addr) |
| 72 | { |
| 73 | struct macvlan_dev *vlan; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 74 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 75 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[addr[5]], hlist) { |
Joe Perches | a6700db | 2012-05-09 17:04:04 +0000 | [diff] [blame] | 76 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 77 | return vlan; |
| 78 | } |
| 79 | return NULL; |
| 80 | } |
| 81 | |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 82 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
| 83 | { |
| 84 | struct macvlan_port *port = vlan->port; |
| 85 | const unsigned char *addr = vlan->dev->dev_addr; |
| 86 | |
| 87 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); |
| 88 | } |
| 89 | |
Eric Dumazet | 449f454 | 2011-05-19 12:24:16 +0000 | [diff] [blame] | 90 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 91 | { |
| 92 | hlist_del_rcu(&vlan->hlist); |
Eric Dumazet | 449f454 | 2011-05-19 12:24:16 +0000 | [diff] [blame] | 93 | if (sync) |
| 94 | synchronize_rcu(); |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, |
| 98 | const unsigned char *addr) |
| 99 | { |
Eric Dumazet | 449f454 | 2011-05-19 12:24:16 +0000 | [diff] [blame] | 100 | macvlan_hash_del(vlan, true); |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 101 | /* Now that we are unhashed it is safe to change the device |
| 102 | * address without confusing packet delivery. |
| 103 | */ |
| 104 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); |
| 105 | macvlan_hash_add(vlan); |
| 106 | } |
| 107 | |
| 108 | static int macvlan_addr_busy(const struct macvlan_port *port, |
| 109 | const unsigned char *addr) |
| 110 | { |
| 111 | /* Test to see if the specified multicast address is |
| 112 | * currently in use by the underlying device or |
| 113 | * another macvlan. |
| 114 | */ |
Joe Perches | a6700db | 2012-05-09 17:04:04 +0000 | [diff] [blame] | 115 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 116 | return 1; |
| 117 | |
| 118 | if (macvlan_hash_lookup(port, addr)) |
| 119 | return 1; |
| 120 | |
| 121 | return 0; |
| 122 | } |
| 123 | |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 124 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 125 | static int macvlan_broadcast_one(struct sk_buff *skb, |
| 126 | const struct macvlan_dev *vlan, |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 127 | const struct ethhdr *eth, bool local) |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 128 | { |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 129 | struct net_device *dev = vlan->dev; |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 130 | |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 131 | if (local) |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 132 | return __dev_forward_skb(dev, skb); |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 133 | |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 134 | skb->dev = dev; |
Joe Perches | a6700db | 2012-05-09 17:04:04 +0000 | [diff] [blame] | 135 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 136 | skb->pkt_type = PACKET_BROADCAST; |
| 137 | else |
| 138 | skb->pkt_type = PACKET_MULTICAST; |
| 139 | |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 140 | return 0; |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 141 | } |
| 142 | |
Eric Dumazet | 3807ff5 | 2013-02-07 16:41:02 +0000 | [diff] [blame] | 143 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
| 144 | { |
| 145 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); |
| 146 | } |
| 147 | |
| 148 | |
| 149 | static unsigned int mc_hash(const struct macvlan_dev *vlan, |
| 150 | const unsigned char *addr) |
Eric Dumazet | cd431e7 | 2013-02-05 20:22:50 +0000 | [diff] [blame] | 151 | { |
| 152 | u32 val = __get_unaligned_cpu32(addr + 2); |
| 153 | |
Eric Dumazet | 3807ff5 | 2013-02-07 16:41:02 +0000 | [diff] [blame] | 154 | val ^= macvlan_hash_mix(vlan); |
Eric Dumazet | cd431e7 | 2013-02-05 20:22:50 +0000 | [diff] [blame] | 155 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
| 156 | } |
| 157 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 158 | static void macvlan_broadcast(struct sk_buff *skb, |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 159 | const struct macvlan_port *port, |
| 160 | struct net_device *src, |
| 161 | enum macvlan_mode mode) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 162 | { |
| 163 | const struct ethhdr *eth = eth_hdr(skb); |
| 164 | const struct macvlan_dev *vlan; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 165 | struct sk_buff *nskb; |
| 166 | unsigned int i; |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 167 | int err; |
Eric Dumazet | 3807ff5 | 2013-02-07 16:41:02 +0000 | [diff] [blame] | 168 | unsigned int hash; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 169 | |
Patrick McHardy | efbbced | 2008-11-26 15:30:48 -0800 | [diff] [blame] | 170 | if (skb->protocol == htons(ETH_P_PAUSE)) |
| 171 | return; |
| 172 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 173 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 174 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 175 | if (vlan->dev == src || !(vlan->mode & mode)) |
| 176 | continue; |
| 177 | |
Eric Dumazet | 3807ff5 | 2013-02-07 16:41:02 +0000 | [diff] [blame] | 178 | hash = mc_hash(vlan, eth->h_dest); |
Eric Dumazet | cd431e7 | 2013-02-05 20:22:50 +0000 | [diff] [blame] | 179 | if (!test_bit(hash, vlan->mc_filter)) |
| 180 | continue; |
Herbert Xu | de9e8f3 | 2013-09-07 12:27:11 +1000 | [diff] [blame] | 181 | |
| 182 | err = NET_RX_DROP; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 183 | nskb = skb_clone(skb, GFP_ATOMIC); |
Herbert Xu | de9e8f3 | 2013-09-07 12:27:11 +1000 | [diff] [blame] | 184 | if (likely(nskb)) |
| 185 | err = macvlan_broadcast_one( |
| 186 | nskb, vlan, eth, |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 187 | mode == MACVLAN_MODE_BRIDGE) ?: |
| 188 | netif_rx_ni(nskb); |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 189 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
| 190 | err == NET_RX_SUCCESS, 1); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 191 | } |
| 192 | } |
| 193 | } |
| 194 | |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 195 | static void macvlan_process_broadcast(struct work_struct *w) |
| 196 | { |
| 197 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
| 198 | bc_work); |
| 199 | struct sk_buff *skb; |
| 200 | struct sk_buff_head list; |
| 201 | |
| 202 | skb_queue_head_init(&list); |
| 203 | |
| 204 | spin_lock_bh(&port->bc_queue.lock); |
| 205 | skb_queue_splice_tail_init(&port->bc_queue, &list); |
| 206 | spin_unlock_bh(&port->bc_queue.lock); |
| 207 | |
| 208 | while ((skb = __skb_dequeue(&list))) { |
| 209 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; |
| 210 | |
| 211 | rcu_read_lock(); |
| 212 | |
| 213 | if (!src) |
| 214 | /* frame comes from an external address */ |
| 215 | macvlan_broadcast(skb, port, NULL, |
| 216 | MACVLAN_MODE_PRIVATE | |
| 217 | MACVLAN_MODE_VEPA | |
| 218 | MACVLAN_MODE_PASSTHRU| |
| 219 | MACVLAN_MODE_BRIDGE); |
| 220 | else if (src->mode == MACVLAN_MODE_VEPA) |
| 221 | /* flood to everyone except source */ |
| 222 | macvlan_broadcast(skb, port, src->dev, |
| 223 | MACVLAN_MODE_VEPA | |
| 224 | MACVLAN_MODE_BRIDGE); |
| 225 | else |
| 226 | /* |
| 227 | * flood only to VEPA ports, bridge ports |
| 228 | * already saw the frame on the way out. |
| 229 | */ |
| 230 | macvlan_broadcast(skb, port, src->dev, |
| 231 | MACVLAN_MODE_VEPA); |
| 232 | |
| 233 | rcu_read_unlock(); |
| 234 | |
| 235 | kfree_skb(skb); |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, |
| 240 | struct sk_buff *skb) |
| 241 | { |
Herbert Xu | e676f19 | 2014-04-22 17:15:34 +0800 | [diff] [blame] | 242 | struct sk_buff *nskb; |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 243 | int err = -ENOMEM; |
| 244 | |
Herbert Xu | e676f19 | 2014-04-22 17:15:34 +0800 | [diff] [blame] | 245 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 246 | if (!nskb) |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 247 | goto err; |
| 248 | |
| 249 | spin_lock(&port->bc_queue.lock); |
| 250 | if (skb_queue_len(&port->bc_queue) < skb->dev->tx_queue_len) { |
Herbert Xu | e676f19 | 2014-04-22 17:15:34 +0800 | [diff] [blame] | 251 | __skb_queue_tail(&port->bc_queue, nskb); |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 252 | err = 0; |
| 253 | } |
| 254 | spin_unlock(&port->bc_queue.lock); |
| 255 | |
| 256 | if (err) |
Herbert Xu | e676f19 | 2014-04-22 17:15:34 +0800 | [diff] [blame] | 257 | goto free_nskb; |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 258 | |
| 259 | schedule_work(&port->bc_work); |
| 260 | return; |
| 261 | |
Herbert Xu | e676f19 | 2014-04-22 17:15:34 +0800 | [diff] [blame] | 262 | free_nskb: |
| 263 | kfree_skb(nskb); |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 264 | err: |
| 265 | atomic_long_inc(&skb->dev->rx_dropped); |
| 266 | } |
| 267 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 268 | /* called under rcu_read_lock() from netif_receive_skb */ |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 269 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 270 | { |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 271 | struct macvlan_port *port; |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 272 | struct sk_buff *skb = *pskb; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 273 | const struct ethhdr *eth = eth_hdr(skb); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 274 | const struct macvlan_dev *vlan; |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 275 | const struct macvlan_dev *src; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 276 | struct net_device *dev; |
Sridhar Samudrala | ba01877 | 2010-07-27 09:10:07 +0000 | [diff] [blame] | 277 | unsigned int len = 0; |
| 278 | int ret = NET_RX_DROP; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 279 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 280 | port = macvlan_port_get_rcu(skb->dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 281 | if (is_multicast_ether_addr(eth->h_dest)) { |
Eric Dumazet | bc416d9 | 2011-10-06 10:28:31 +0000 | [diff] [blame] | 282 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); |
| 283 | if (!skb) |
| 284 | return RX_HANDLER_CONSUMED; |
Eric Dumazet | 4ec7ac1 | 2012-01-23 05:38:59 +0000 | [diff] [blame] | 285 | eth = eth_hdr(skb); |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 286 | src = macvlan_hash_lookup(port, eth->h_source); |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 287 | if (src && src->mode != MACVLAN_MODE_VEPA && |
| 288 | src->mode != MACVLAN_MODE_BRIDGE) { |
stephen hemminger | 729e72a | 2011-11-02 12:11:53 +0000 | [diff] [blame] | 289 | /* forward to original port. */ |
| 290 | vlan = src; |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 291 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
| 292 | netif_rx(skb); |
stephen hemminger | 729e72a | 2011-11-02 12:11:53 +0000 | [diff] [blame] | 293 | goto out; |
| 294 | } |
| 295 | |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 296 | MACVLAN_SKB_CB(skb)->src = src; |
| 297 | macvlan_broadcast_enqueue(port, skb); |
| 298 | |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 299 | return RX_HANDLER_PASS; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 300 | } |
| 301 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 302 | if (port->passthru) |
Jiri Pirko | 233c7df | 2013-05-09 04:23:40 +0000 | [diff] [blame] | 303 | vlan = list_first_or_null_rcu(&port->vlans, |
| 304 | struct macvlan_dev, list); |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 305 | else |
| 306 | vlan = macvlan_hash_lookup(port, eth->h_dest); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 307 | if (vlan == NULL) |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 308 | return RX_HANDLER_PASS; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 309 | |
| 310 | dev = vlan->dev; |
| 311 | if (unlikely(!(dev->flags & IFF_UP))) { |
| 312 | kfree_skb(skb); |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 313 | return RX_HANDLER_CONSUMED; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 314 | } |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 315 | len = skb->len + ETH_HLEN; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 316 | skb = skb_share_check(skb, GFP_ATOMIC); |
Arnd Bergmann | a1e514c | 2009-11-26 06:07:09 +0000 | [diff] [blame] | 317 | if (!skb) |
Sridhar Samudrala | ba01877 | 2010-07-27 09:10:07 +0000 | [diff] [blame] | 318 | goto out; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 319 | |
| 320 | skb->dev = dev; |
| 321 | skb->pkt_type = PACKET_HOST; |
| 322 | |
Vlad Yasevich | 2f6a1b6 | 2013-12-11 13:27:11 -0500 | [diff] [blame] | 323 | ret = netif_rx(skb); |
Sridhar Samudrala | ba01877 | 2010-07-27 09:10:07 +0000 | [diff] [blame] | 324 | |
| 325 | out: |
| 326 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 327 | return RX_HANDLER_CONSUMED; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 328 | } |
| 329 | |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 330 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
| 331 | { |
| 332 | const struct macvlan_dev *vlan = netdev_priv(dev); |
| 333 | const struct macvlan_port *port = vlan->port; |
| 334 | const struct macvlan_dev *dest; |
Daniel Lezcano | 12a2856 | 2011-03-14 06:08:07 +0000 | [diff] [blame] | 335 | __u8 ip_summed = skb->ip_summed; |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 336 | |
| 337 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { |
| 338 | const struct ethhdr *eth = (void *)skb->data; |
Daniel Lezcano | 12a2856 | 2011-03-14 06:08:07 +0000 | [diff] [blame] | 339 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 340 | |
| 341 | /* send to other bridge ports directly */ |
| 342 | if (is_multicast_ether_addr(eth->h_dest)) { |
| 343 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); |
| 344 | goto xmit_world; |
| 345 | } |
| 346 | |
| 347 | dest = macvlan_hash_lookup(port, eth->h_dest); |
| 348 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { |
David Ward | a37dd33 | 2011-05-19 02:53:20 +0000 | [diff] [blame] | 349 | /* send to lowerdev first for its network taps */ |
David Ward | cb2d0f3 | 2011-09-18 12:53:20 +0000 | [diff] [blame] | 350 | dev_forward_skb(vlan->lowerdev, skb); |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 351 | |
| 352 | return NET_XMIT_SUCCESS; |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | xmit_world: |
Daniel Lezcano | 12a2856 | 2011-03-14 06:08:07 +0000 | [diff] [blame] | 357 | skb->ip_summed = ip_summed; |
David S. Miller | 59b9997 | 2012-05-10 23:03:34 -0400 | [diff] [blame] | 358 | skb->dev = vlan->lowerdev; |
Arnd Bergmann | 618e1b7 | 2009-11-26 06:07:10 +0000 | [diff] [blame] | 359 | return dev_queue_xmit(skb); |
| 360 | } |
| 361 | |
stephen hemminger | 0db901b | 2013-12-27 12:06:46 -0800 | [diff] [blame] | 362 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
| 363 | struct net_device *dev) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 364 | { |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 365 | unsigned int len = skb->len; |
| 366 | int ret; |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 367 | const struct macvlan_dev *vlan = netdev_priv(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 368 | |
John Fastabend | a6cc0cf | 2013-11-06 09:54:46 -0800 | [diff] [blame] | 369 | if (vlan->fwd_priv) { |
| 370 | skb->dev = vlan->lowerdev; |
Jason Wang | f663dd9 | 2014-01-10 16:18:26 +0800 | [diff] [blame] | 371 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
John Fastabend | a6cc0cf | 2013-11-06 09:54:46 -0800 | [diff] [blame] | 372 | } else { |
| 373 | ret = macvlan_queue_xmit(skb, dev); |
| 374 | } |
| 375 | |
Eric Dumazet | 2d6c9ff | 2010-05-10 04:51:02 +0000 | [diff] [blame] | 376 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
Li RongQing | cdf3e27 | 2014-01-04 14:22:34 +0800 | [diff] [blame] | 377 | struct vlan_pcpu_stats *pcpu_stats; |
Eric Dumazet | 2c11455 | 2009-09-03 00:11:45 +0000 | [diff] [blame] | 378 | |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 379 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
| 380 | u64_stats_update_begin(&pcpu_stats->syncp); |
| 381 | pcpu_stats->tx_packets++; |
| 382 | pcpu_stats->tx_bytes += len; |
| 383 | u64_stats_update_end(&pcpu_stats->syncp); |
| 384 | } else { |
| 385 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); |
| 386 | } |
Patrick McHardy | cbbef5e | 2009-11-10 06:14:24 +0000 | [diff] [blame] | 387 | return ret; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | 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] | 391 | unsigned short type, const void *daddr, |
| 392 | const void *saddr, unsigned len) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 393 | { |
| 394 | const struct macvlan_dev *vlan = netdev_priv(dev); |
| 395 | struct net_device *lowerdev = vlan->lowerdev; |
| 396 | |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 397 | return dev_hard_header(skb, lowerdev, type, daddr, |
| 398 | saddr ? : dev->dev_addr, len); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 399 | } |
| 400 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 401 | static const struct header_ops macvlan_hard_header_ops = { |
| 402 | .create = macvlan_hard_header, |
| 403 | .rebuild = eth_rebuild_header, |
| 404 | .parse = eth_header_parse, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 405 | .cache = eth_header_cache, |
| 406 | .cache_update = eth_header_cache_update, |
| 407 | }; |
| 408 | |
Jason Wang | b13ba1b | 2014-01-10 16:18:25 +0800 | [diff] [blame] | 409 | static struct rtnl_link_ops macvlan_link_ops; |
| 410 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 411 | static int macvlan_open(struct net_device *dev) |
| 412 | { |
| 413 | struct macvlan_dev *vlan = netdev_priv(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 414 | struct net_device *lowerdev = vlan->lowerdev; |
| 415 | int err; |
| 416 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 417 | if (vlan->port->passthru) { |
Michael S. Tsirkin | 7873814 | 2013-08-01 13:50:10 +0300 | [diff] [blame] | 418 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
| 419 | err = dev_set_promiscuity(lowerdev, 1); |
| 420 | if (err < 0) |
| 421 | goto out; |
| 422 | } |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 423 | goto hash_add; |
| 424 | } |
| 425 | |
Jason Wang | b13ba1b | 2014-01-10 16:18:25 +0800 | [diff] [blame] | 426 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD && |
| 427 | dev->rtnl_link_ops == &macvlan_link_ops) { |
John Fastabend | a6cc0cf | 2013-11-06 09:54:46 -0800 | [diff] [blame] | 428 | vlan->fwd_priv = |
| 429 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); |
| 430 | |
| 431 | /* If we get a NULL pointer back, or if we get an error |
| 432 | * then we should just fall through to the non accelerated path |
| 433 | */ |
| 434 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { |
| 435 | vlan->fwd_priv = NULL; |
Jason Wang | f663dd9 | 2014-01-10 16:18:26 +0800 | [diff] [blame] | 436 | } else |
John Fastabend | a6cc0cf | 2013-11-06 09:54:46 -0800 | [diff] [blame] | 437 | return 0; |
John Fastabend | a6cc0cf | 2013-11-06 09:54:46 -0800 | [diff] [blame] | 438 | } |
| 439 | |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 440 | err = -EBUSY; |
| 441 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
| 442 | goto out; |
| 443 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 444 | err = dev_uc_add(lowerdev, dev->dev_addr); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 445 | if (err < 0) |
Wang Chen | b89fb7d | 2008-07-14 20:57:07 -0700 | [diff] [blame] | 446 | goto out; |
| 447 | if (dev->flags & IFF_ALLMULTI) { |
| 448 | err = dev_set_allmulti(lowerdev, 1); |
| 449 | if (err < 0) |
| 450 | goto del_unicast; |
| 451 | } |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 452 | |
| 453 | hash_add: |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 454 | macvlan_hash_add(vlan); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 455 | return 0; |
Wang Chen | b89fb7d | 2008-07-14 20:57:07 -0700 | [diff] [blame] | 456 | |
| 457 | del_unicast: |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 458 | dev_uc_del(lowerdev, dev->dev_addr); |
Wang Chen | b89fb7d | 2008-07-14 20:57:07 -0700 | [diff] [blame] | 459 | out: |
John Fastabend | a6cc0cf | 2013-11-06 09:54:46 -0800 | [diff] [blame] | 460 | if (vlan->fwd_priv) { |
| 461 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
| 462 | vlan->fwd_priv); |
| 463 | vlan->fwd_priv = NULL; |
| 464 | } |
Wang Chen | b89fb7d | 2008-07-14 20:57:07 -0700 | [diff] [blame] | 465 | return err; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | static int macvlan_stop(struct net_device *dev) |
| 469 | { |
| 470 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 471 | struct net_device *lowerdev = vlan->lowerdev; |
| 472 | |
John Fastabend | a6cc0cf | 2013-11-06 09:54:46 -0800 | [diff] [blame] | 473 | if (vlan->fwd_priv) { |
| 474 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
| 475 | vlan->fwd_priv); |
| 476 | vlan->fwd_priv = NULL; |
| 477 | return 0; |
| 478 | } |
| 479 | |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 480 | dev_uc_unsync(lowerdev, dev); |
| 481 | dev_mc_unsync(lowerdev, dev); |
| 482 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 483 | if (vlan->port->passthru) { |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 484 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
| 485 | dev_set_promiscuity(lowerdev, -1); |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 486 | goto hash_del; |
| 487 | } |
| 488 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 489 | if (dev->flags & IFF_ALLMULTI) |
| 490 | dev_set_allmulti(lowerdev, -1); |
| 491 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 492 | dev_uc_del(lowerdev, dev->dev_addr); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 493 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 494 | hash_del: |
Eric Dumazet | 449f454 | 2011-05-19 12:24:16 +0000 | [diff] [blame] | 495 | macvlan_hash_del(vlan, !dev->dismantle); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 496 | return 0; |
| 497 | } |
| 498 | |
Patrick McHardy | ad5d20a | 2007-11-19 22:00:42 -0800 | [diff] [blame] | 499 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
| 500 | { |
| 501 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 502 | struct net_device *lowerdev = vlan->lowerdev; |
| 503 | struct sockaddr *addr = p; |
| 504 | int err; |
| 505 | |
| 506 | if (!is_valid_ether_addr(addr->sa_data)) |
| 507 | return -EADDRNOTAVAIL; |
| 508 | |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 509 | if (!(dev->flags & IFF_UP)) { |
| 510 | /* Just copy in the new address */ |
| 511 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
| 512 | } else { |
| 513 | /* Rehash and update the device filters */ |
| 514 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
| 515 | return -EBUSY; |
Patrick McHardy | ad5d20a | 2007-11-19 22:00:42 -0800 | [diff] [blame] | 516 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 517 | err = dev_uc_add(lowerdev, addr->sa_data); |
Jiri Pirko | ccffad25 | 2009-05-22 23:22:17 +0000 | [diff] [blame] | 518 | if (err) |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 519 | return err; |
Patrick McHardy | ad5d20a | 2007-11-19 22:00:42 -0800 | [diff] [blame] | 520 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 521 | dev_uc_del(lowerdev, dev->dev_addr); |
Eric Biederman | f9ac30f | 2009-03-13 13:16:13 -0700 | [diff] [blame] | 522 | |
| 523 | macvlan_hash_change_addr(vlan, addr->sa_data); |
| 524 | } |
Patrick McHardy | ad5d20a | 2007-11-19 22:00:42 -0800 | [diff] [blame] | 525 | return 0; |
| 526 | } |
| 527 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 528 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
| 529 | { |
| 530 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 531 | struct net_device *lowerdev = vlan->lowerdev; |
| 532 | |
| 533 | if (change & IFF_ALLMULTI) |
| 534 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); |
| 535 | } |
| 536 | |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 537 | static void macvlan_set_mac_lists(struct net_device *dev) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 538 | { |
| 539 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 540 | |
Eric Dumazet | cd431e7 | 2013-02-05 20:22:50 +0000 | [diff] [blame] | 541 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
| 542 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); |
| 543 | } else { |
| 544 | struct netdev_hw_addr *ha; |
| 545 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); |
| 546 | |
| 547 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); |
| 548 | netdev_for_each_mc_addr(ha, dev) { |
Eric Dumazet | 3807ff5 | 2013-02-07 16:41:02 +0000 | [diff] [blame] | 549 | __set_bit(mc_hash(vlan, ha->addr), filter); |
Eric Dumazet | cd431e7 | 2013-02-05 20:22:50 +0000 | [diff] [blame] | 550 | } |
Eric Dumazet | d527043 | 2013-02-07 16:02:57 +0000 | [diff] [blame] | 551 | |
Eric Dumazet | 3807ff5 | 2013-02-07 16:41:02 +0000 | [diff] [blame] | 552 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
Eric Dumazet | d527043 | 2013-02-07 16:02:57 +0000 | [diff] [blame] | 553 | |
Eric Dumazet | cd431e7 | 2013-02-05 20:22:50 +0000 | [diff] [blame] | 554 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
| 555 | } |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 556 | dev_uc_sync(vlan->lowerdev, dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 557 | dev_mc_sync(vlan->lowerdev, dev); |
| 558 | } |
| 559 | |
| 560 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) |
| 561 | { |
| 562 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 563 | |
| 564 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) |
| 565 | return -EINVAL; |
| 566 | dev->mtu = new_mtu; |
| 567 | return 0; |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * macvlan network devices have devices nesting below it and are a special |
| 572 | * "super class" of normal network devices; split their locks off into a |
| 573 | * separate class since they always nest. |
| 574 | */ |
| 575 | static struct lock_class_key macvlan_netdev_xmit_lock_key; |
David S. Miller | cf508b1 | 2008-07-22 14:16:42 -0700 | [diff] [blame] | 576 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 577 | |
Vlad Yasevich | 8b4703e | 2014-03-03 15:33:53 -0500 | [diff] [blame] | 578 | #define ALWAYS_ON_FEATURES \ |
| 579 | (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX) |
| 580 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 581 | #define MACVLAN_FEATURES \ |
| 582 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
| 583 | 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] | 584 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
Patrick McHardy | 28d2b13 | 2013-04-19 02:04:32 +0000 | [diff] [blame] | 585 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 586 | |
| 587 | #define MACVLAN_STATE_MASK \ |
| 588 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) |
| 589 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 590 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
| 591 | struct netdev_queue *txq, |
| 592 | void *_unused) |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 593 | { |
| 594 | lockdep_set_class(&txq->_xmit_lock, |
| 595 | &macvlan_netdev_xmit_lock_key); |
| 596 | } |
| 597 | |
| 598 | static void macvlan_set_lockdep_class(struct net_device *dev) |
| 599 | { |
David S. Miller | cf508b1 | 2008-07-22 14:16:42 -0700 | [diff] [blame] | 600 | lockdep_set_class(&dev->addr_list_lock, |
| 601 | &macvlan_netdev_addr_lock_key); |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 602 | 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] | 603 | } |
| 604 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 605 | static int macvlan_init(struct net_device *dev) |
| 606 | { |
| 607 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 608 | const struct net_device *lowerdev = vlan->lowerdev; |
| 609 | |
| 610 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | |
| 611 | (lowerdev->state & MACVLAN_STATE_MASK); |
| 612 | dev->features = lowerdev->features & MACVLAN_FEATURES; |
Vlad Yasevich | 8b4703e | 2014-03-03 15:33:53 -0500 | [diff] [blame] | 613 | dev->features |= ALWAYS_ON_FEATURES; |
Patrick McHardy | 8c2acc5 | 2009-11-23 14:18:53 -0800 | [diff] [blame] | 614 | dev->gso_max_size = lowerdev->gso_max_size; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 615 | dev->iflink = lowerdev->ifindex; |
sg.tweak@gmail.com | ef5c899 | 2009-06-10 09:55:02 +0000 | [diff] [blame] | 616 | dev->hard_header_len = lowerdev->hard_header_len; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 617 | |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 618 | macvlan_set_lockdep_class(dev); |
| 619 | |
WANG Cong | 1c213bd | 2014-02-13 11:46:28 -0800 | [diff] [blame] | 620 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 621 | if (!vlan->pcpu_stats) |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 622 | return -ENOMEM; |
| 623 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 624 | return 0; |
| 625 | } |
| 626 | |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 627 | static void macvlan_uninit(struct net_device *dev) |
| 628 | { |
| 629 | struct macvlan_dev *vlan = netdev_priv(dev); |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 630 | struct macvlan_port *port = vlan->port; |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 631 | |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 632 | free_percpu(vlan->pcpu_stats); |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 633 | |
| 634 | port->count -= 1; |
| 635 | if (!port->count) |
| 636 | macvlan_port_destroy(port->dev); |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 637 | } |
| 638 | |
Eric Dumazet | 2817273 | 2010-07-07 14:58:56 -0700 | [diff] [blame] | 639 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
| 640 | struct rtnl_link_stats64 *stats) |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 641 | { |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 642 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 643 | |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 644 | if (vlan->pcpu_stats) { |
Li RongQing | cdf3e27 | 2014-01-04 14:22:34 +0800 | [diff] [blame] | 645 | struct vlan_pcpu_stats *p; |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 646 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
| 647 | u32 rx_errors = 0, tx_dropped = 0; |
Eric Dumazet | bc66154 | 2010-06-24 00:54:21 +0000 | [diff] [blame] | 648 | unsigned int start; |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 649 | int i; |
| 650 | |
| 651 | for_each_possible_cpu(i) { |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 652 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
Eric Dumazet | bc66154 | 2010-06-24 00:54:21 +0000 | [diff] [blame] | 653 | do { |
Eric W. Biederman | 57a7744 | 2014-03-13 21:26:42 -0700 | [diff] [blame] | 654 | start = u64_stats_fetch_begin_irq(&p->syncp); |
Eric Dumazet | bc66154 | 2010-06-24 00:54:21 +0000 | [diff] [blame] | 655 | rx_packets = p->rx_packets; |
| 656 | rx_bytes = p->rx_bytes; |
| 657 | rx_multicast = p->rx_multicast; |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 658 | tx_packets = p->tx_packets; |
| 659 | tx_bytes = p->tx_bytes; |
Eric W. Biederman | 57a7744 | 2014-03-13 21:26:42 -0700 | [diff] [blame] | 660 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 661 | |
| 662 | stats->rx_packets += rx_packets; |
| 663 | stats->rx_bytes += rx_bytes; |
| 664 | stats->multicast += rx_multicast; |
| 665 | stats->tx_packets += tx_packets; |
| 666 | stats->tx_bytes += tx_bytes; |
| 667 | /* rx_errors & tx_dropped are u32, updated |
| 668 | * without syncp protection. |
| 669 | */ |
| 670 | rx_errors += p->rx_errors; |
| 671 | tx_dropped += p->tx_dropped; |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 672 | } |
Eric Dumazet | 8ffab51 | 2010-11-10 21:14:04 +0000 | [diff] [blame] | 673 | stats->rx_errors = rx_errors; |
| 674 | stats->rx_dropped = rx_errors; |
| 675 | stats->tx_dropped = tx_dropped; |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 676 | } |
| 677 | return stats; |
| 678 | } |
| 679 | |
Jiri Pirko | 8e58613 | 2011-12-08 19:52:37 -0500 | [diff] [blame] | 680 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
Patrick McHardy | 80d5c36 | 2013-04-19 02:04:28 +0000 | [diff] [blame] | 681 | __be16 proto, u16 vid) |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 682 | { |
| 683 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 684 | struct net_device *lowerdev = vlan->lowerdev; |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 685 | |
Patrick McHardy | 80d5c36 | 2013-04-19 02:04:28 +0000 | [diff] [blame] | 686 | return vlan_vid_add(lowerdev, proto, vid); |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 687 | } |
| 688 | |
Jiri Pirko | 8e58613 | 2011-12-08 19:52:37 -0500 | [diff] [blame] | 689 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
Patrick McHardy | 80d5c36 | 2013-04-19 02:04:28 +0000 | [diff] [blame] | 690 | __be16 proto, u16 vid) |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 691 | { |
| 692 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 693 | struct net_device *lowerdev = vlan->lowerdev; |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 694 | |
Patrick McHardy | 80d5c36 | 2013-04-19 02:04:28 +0000 | [diff] [blame] | 695 | vlan_vid_del(lowerdev, proto, vid); |
Jiri Pirko | 8e58613 | 2011-12-08 19:52:37 -0500 | [diff] [blame] | 696 | return 0; |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 697 | } |
| 698 | |
stephen hemminger | edc7d57 | 2012-10-01 12:32:33 +0000 | [diff] [blame] | 699 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 700 | struct net_device *dev, |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 701 | const unsigned char *addr, |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 702 | u16 flags) |
| 703 | { |
| 704 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 705 | int err = -EINVAL; |
| 706 | |
| 707 | if (!vlan->port->passthru) |
| 708 | return -EOPNOTSUPP; |
| 709 | |
Thomas Richter | ab2cfbb | 2013-07-19 17:20:08 +0200 | [diff] [blame] | 710 | if (flags & NLM_F_REPLACE) |
| 711 | return -EOPNOTSUPP; |
| 712 | |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 713 | if (is_unicast_ether_addr(addr)) |
| 714 | err = dev_uc_add_excl(dev, addr); |
| 715 | else if (is_multicast_ether_addr(addr)) |
| 716 | err = dev_mc_add_excl(dev, addr); |
| 717 | |
| 718 | return err; |
| 719 | } |
| 720 | |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 721 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 722 | struct net_device *dev, |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 723 | const unsigned char *addr) |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 724 | { |
| 725 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 726 | int err = -EINVAL; |
| 727 | |
| 728 | if (!vlan->port->passthru) |
| 729 | return -EOPNOTSUPP; |
| 730 | |
| 731 | if (is_unicast_ether_addr(addr)) |
| 732 | err = dev_uc_del(dev, addr); |
| 733 | else if (is_multicast_ether_addr(addr)) |
| 734 | err = dev_mc_del(dev, addr); |
| 735 | |
| 736 | return err; |
| 737 | } |
| 738 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 739 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
| 740 | struct ethtool_drvinfo *drvinfo) |
| 741 | { |
Jiri Pirko | 7826d43 | 2013-01-06 00:44:26 +0000 | [diff] [blame] | 742 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
| 743 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 744 | } |
| 745 | |
Stephen Hemminger | 9edb8bb | 2008-10-29 15:31:53 -0700 | [diff] [blame] | 746 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
| 747 | struct ethtool_cmd *cmd) |
| 748 | { |
| 749 | const struct macvlan_dev *vlan = netdev_priv(dev); |
Jiri Pirko | 4bc71cb | 2011-09-03 03:34:30 +0000 | [diff] [blame] | 750 | |
| 751 | return __ethtool_get_settings(vlan->lowerdev, cmd); |
Stephen Hemminger | 9edb8bb | 2008-10-29 15:31:53 -0700 | [diff] [blame] | 752 | } |
| 753 | |
Vlad Yasevich | 2be5c76 | 2013-06-25 16:04:21 -0400 | [diff] [blame] | 754 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
| 755 | netdev_features_t features) |
| 756 | { |
| 757 | struct macvlan_dev *vlan = netdev_priv(dev); |
Florian Westphal | 797f87f | 2013-12-26 12:17:00 +0100 | [diff] [blame] | 758 | netdev_features_t mask; |
Vlad Yasevich | 2be5c76 | 2013-06-25 16:04:21 -0400 | [diff] [blame] | 759 | |
Florian Westphal | 797f87f | 2013-12-26 12:17:00 +0100 | [diff] [blame] | 760 | features |= NETIF_F_ALL_FOR_ALL; |
| 761 | features &= (vlan->set_features | ~MACVLAN_FEATURES); |
| 762 | mask = features; |
| 763 | |
| 764 | features = netdev_increment_features(vlan->lowerdev->features, |
| 765 | features, |
| 766 | mask); |
Vlad Yasevich | 8b4703e | 2014-03-03 15:33:53 -0500 | [diff] [blame] | 767 | features |= ALWAYS_ON_FEATURES; |
Florian Westphal | 797f87f | 2013-12-26 12:17:00 +0100 | [diff] [blame] | 768 | |
| 769 | return features; |
Vlad Yasevich | 2be5c76 | 2013-06-25 16:04:21 -0400 | [diff] [blame] | 770 | } |
| 771 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 772 | static const struct ethtool_ops macvlan_ethtool_ops = { |
| 773 | .get_link = ethtool_op_get_link, |
Stephen Hemminger | 9edb8bb | 2008-10-29 15:31:53 -0700 | [diff] [blame] | 774 | .get_settings = macvlan_ethtool_get_settings, |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 775 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
| 776 | }; |
| 777 | |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 778 | static const struct net_device_ops macvlan_netdev_ops = { |
| 779 | .ndo_init = macvlan_init, |
Eric Dumazet | fccaf71 | 2009-11-17 08:53:49 +0000 | [diff] [blame] | 780 | .ndo_uninit = macvlan_uninit, |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 781 | .ndo_open = macvlan_open, |
| 782 | .ndo_stop = macvlan_stop, |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 783 | .ndo_start_xmit = macvlan_start_xmit, |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 784 | .ndo_change_mtu = macvlan_change_mtu, |
Vlad Yasevich | 2be5c76 | 2013-06-25 16:04:21 -0400 | [diff] [blame] | 785 | .ndo_fix_features = macvlan_fix_features, |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 786 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
| 787 | .ndo_set_mac_address = macvlan_set_mac_address, |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 788 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
Eric Dumazet | bc66154 | 2010-06-24 00:54:21 +0000 | [diff] [blame] | 789 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 790 | .ndo_validate_addr = eth_validate_addr, |
John Fastabend | 8d13e67 | 2011-06-06 04:27:16 +0000 | [diff] [blame] | 791 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
| 792 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 793 | .ndo_fdb_add = macvlan_fdb_add, |
| 794 | .ndo_fdb_del = macvlan_fdb_del, |
| 795 | .ndo_fdb_dump = ndo_dflt_fdb_dump, |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 796 | }; |
| 797 | |
Herbert Xu | 8a35747 | 2010-07-21 21:44:31 +0000 | [diff] [blame] | 798 | void macvlan_common_setup(struct net_device *dev) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 799 | { |
| 800 | ether_setup(dev); |
| 801 | |
Neil Horman | 550fd08 | 2011-07-26 06:05:38 +0000 | [diff] [blame] | 802 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
Vlad Yasevich | 87ab7f6 | 2013-03-07 10:21:48 +0000 | [diff] [blame] | 803 | dev->priv_flags |= IFF_UNICAST_FLT; |
Stephen Hemminger | 54a30c9 | 2008-11-19 21:51:06 -0800 | [diff] [blame] | 804 | dev->netdev_ops = &macvlan_netdev_ops; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 805 | dev->destructor = free_netdev; |
Lutz Jaenicke | 7174012 | 2013-08-28 13:34:31 +0200 | [diff] [blame] | 806 | dev->header_ops = &macvlan_hard_header_ops; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 807 | dev->ethtool_ops = &macvlan_ethtool_ops; |
Herbert Xu | 8a35747 | 2010-07-21 21:44:31 +0000 | [diff] [blame] | 808 | } |
| 809 | EXPORT_SYMBOL_GPL(macvlan_common_setup); |
| 810 | |
| 811 | static void macvlan_setup(struct net_device *dev) |
| 812 | { |
| 813 | macvlan_common_setup(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 814 | dev->tx_queue_len = 0; |
| 815 | } |
| 816 | |
| 817 | static int macvlan_port_create(struct net_device *dev) |
| 818 | { |
| 819 | struct macvlan_port *port; |
| 820 | unsigned int i; |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 821 | int err; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 822 | |
| 823 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) |
| 824 | return -EINVAL; |
| 825 | |
| 826 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
| 827 | if (port == NULL) |
| 828 | return -ENOMEM; |
| 829 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 830 | port->passthru = false; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 831 | port->dev = dev; |
| 832 | INIT_LIST_HEAD(&port->vlans); |
| 833 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
| 834 | INIT_HLIST_HEAD(&port->vlan_hash[i]); |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 835 | |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 836 | skb_queue_head_init(&port->bc_queue); |
| 837 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); |
| 838 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 839 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
| 840 | if (err) |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 841 | kfree(port); |
Eric Dumazet | d935156 | 2011-05-20 14:59:23 -0400 | [diff] [blame] | 842 | else |
| 843 | dev->priv_flags |= IFF_MACVLAN_PORT; |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 844 | return err; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | static void macvlan_port_destroy(struct net_device *dev) |
| 848 | { |
Eric Dumazet | e052f7e | 2013-03-30 10:08:44 +0000 | [diff] [blame] | 849 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 850 | |
Herbert Xu | 412ca15 | 2014-04-17 13:45:59 +0800 | [diff] [blame] | 851 | cancel_work_sync(&port->bc_work); |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 852 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 853 | netdev_rx_handler_unregister(dev); |
Lai Jiangshan | 6e070ae | 2011-03-18 12:00:07 +0800 | [diff] [blame] | 854 | kfree_rcu(port, rcu); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 855 | } |
| 856 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 857 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
| 858 | { |
| 859 | if (tb[IFLA_ADDRESS]) { |
| 860 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) |
| 861 | return -EINVAL; |
| 862 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) |
| 863 | return -EADDRNOTAVAIL; |
| 864 | } |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 865 | |
Michael S. Tsirkin | 1512747 | 2013-08-05 18:25:54 +0300 | [diff] [blame] | 866 | if (data && data[IFLA_MACVLAN_FLAGS] && |
| 867 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) |
| 868 | return -EINVAL; |
| 869 | |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 870 | if (data && data[IFLA_MACVLAN_MODE]) { |
| 871 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { |
| 872 | case MACVLAN_MODE_PRIVATE: |
| 873 | case MACVLAN_MODE_VEPA: |
| 874 | case MACVLAN_MODE_BRIDGE: |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 875 | case MACVLAN_MODE_PASSTHRU: |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 876 | break; |
| 877 | default: |
| 878 | return -EINVAL; |
| 879 | } |
| 880 | } |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 881 | return 0; |
| 882 | } |
| 883 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 884 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
Vlad Yasevich | 2f6a1b6 | 2013-12-11 13:27:11 -0500 | [diff] [blame] | 885 | struct nlattr *tb[], struct nlattr *data[]) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 886 | { |
| 887 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 888 | struct macvlan_port *port; |
| 889 | struct net_device *lowerdev; |
| 890 | int err; |
| 891 | |
| 892 | if (!tb[IFLA_LINK]) |
| 893 | return -EINVAL; |
| 894 | |
Eric W. Biederman | 81adee4 | 2009-11-08 00:53:51 -0800 | [diff] [blame] | 895 | 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] | 896 | if (lowerdev == NULL) |
| 897 | return -ENODEV; |
| 898 | |
Kevin Wallace | d70f2cf | 2013-12-03 02:55:22 -0800 | [diff] [blame] | 899 | /* When creating macvlans or macvtaps on top of other macvlans - use |
Eric Biederman | b0832a2 | 2009-03-13 13:15:37 -0700 | [diff] [blame] | 900 | * the real device as the lowerdev. |
Patrick McHardy | a6ca5f1 | 2008-01-10 22:39:28 -0800 | [diff] [blame] | 901 | */ |
Kevin Wallace | d70f2cf | 2013-12-03 02:55:22 -0800 | [diff] [blame] | 902 | if (netif_is_macvlan(lowerdev)) |
| 903 | lowerdev = macvlan_dev_real_dev(lowerdev); |
Patrick McHardy | a6ca5f1 | 2008-01-10 22:39:28 -0800 | [diff] [blame] | 904 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 905 | if (!tb[IFLA_MTU]) |
| 906 | dev->mtu = lowerdev->mtu; |
| 907 | else if (dev->mtu > lowerdev->mtu) |
| 908 | return -EINVAL; |
| 909 | |
| 910 | if (!tb[IFLA_ADDRESS]) |
Danny Kukawka | 7ce5d22 | 2012-02-15 06:45:40 +0000 | [diff] [blame] | 911 | eth_hw_addr_random(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 912 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 913 | if (!macvlan_port_exists(lowerdev)) { |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 914 | err = macvlan_port_create(lowerdev); |
| 915 | if (err < 0) |
| 916 | return err; |
| 917 | } |
Eric Dumazet | e052f7e | 2013-03-30 10:08:44 +0000 | [diff] [blame] | 918 | port = macvlan_port_get_rtnl(lowerdev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 919 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 920 | /* Only 1 macvlan device can be created in passthru mode */ |
| 921 | if (port->passthru) |
| 922 | return -EINVAL; |
| 923 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 924 | vlan->lowerdev = lowerdev; |
| 925 | vlan->dev = dev; |
| 926 | vlan->port = port; |
Vlad Yasevich | 2be5c76 | 2013-06-25 16:04:21 -0400 | [diff] [blame] | 927 | vlan->set_features = MACVLAN_FEATURES; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 928 | |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 929 | vlan->mode = MACVLAN_MODE_VEPA; |
| 930 | if (data && data[IFLA_MACVLAN_MODE]) |
| 931 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); |
| 932 | |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 933 | if (data && data[IFLA_MACVLAN_FLAGS]) |
| 934 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); |
| 935 | |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 936 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 937 | if (port->count) |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 938 | return -EINVAL; |
| 939 | port->passthru = true; |
Bjørn Mork | 8b98604 | 2013-08-30 18:08:47 +0200 | [diff] [blame] | 940 | eth_hw_addr_inherit(dev, lowerdev); |
Sridhar Samudrala | eb06acd | 2010-10-28 13:10:50 +0000 | [diff] [blame] | 941 | } |
| 942 | |
John Fastabend | 47d4ab9 | 2013-10-21 14:28:02 -0700 | [diff] [blame] | 943 | port->count += 1; |
| 944 | err = register_netdevice(dev); |
| 945 | if (err < 0) |
| 946 | goto destroy_port; |
| 947 | |
John Fastabend | a6cc0cf | 2013-11-06 09:54:46 -0800 | [diff] [blame] | 948 | dev->priv_flags |= IFF_MACVLAN; |
Jiri Pirko | 7cd43db | 2013-01-03 22:48:50 +0000 | [diff] [blame] | 949 | err = netdev_upper_dev_link(lowerdev, dev); |
| 950 | if (err) |
Cong Wang | da37705 | 2014-02-11 15:51:29 -0800 | [diff] [blame] | 951 | goto unregister_netdev; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 952 | |
Jiri Pirko | 233c7df | 2013-05-09 04:23:40 +0000 | [diff] [blame] | 953 | list_add_tail_rcu(&vlan->list, &port->vlans); |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 954 | netif_stacked_transfer_operstate(lowerdev, dev); |
Jiri Pirko | f16d3d5 | 2010-05-24 07:02:25 +0000 | [diff] [blame] | 955 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 956 | return 0; |
Jiri Pirko | f16d3d5 | 2010-05-24 07:02:25 +0000 | [diff] [blame] | 957 | |
Cong Wang | da37705 | 2014-02-11 15:51:29 -0800 | [diff] [blame] | 958 | unregister_netdev: |
| 959 | unregister_netdevice(dev); |
Jiri Pirko | f16d3d5 | 2010-05-24 07:02:25 +0000 | [diff] [blame] | 960 | destroy_port: |
Eric W. Biederman | d5cd9244 | 2011-03-21 18:22:22 -0700 | [diff] [blame] | 961 | port->count -= 1; |
| 962 | if (!port->count) |
Jiri Pirko | f16d3d5 | 2010-05-24 07:02:25 +0000 | [diff] [blame] | 963 | macvlan_port_destroy(lowerdev); |
| 964 | |
| 965 | return err; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 966 | } |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 967 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 968 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 969 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
| 970 | struct nlattr *tb[], struct nlattr *data[]) |
| 971 | { |
Vlad Yasevich | 2f6a1b6 | 2013-12-11 13:27:11 -0500 | [diff] [blame] | 972 | return macvlan_common_newlink(src_net, dev, tb, data); |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 973 | } |
| 974 | |
| 975 | void macvlan_dellink(struct net_device *dev, struct list_head *head) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 976 | { |
| 977 | struct macvlan_dev *vlan = netdev_priv(dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 978 | |
Jiri Pirko | 233c7df | 2013-05-09 04:23:40 +0000 | [diff] [blame] | 979 | list_del_rcu(&vlan->list); |
Eric Dumazet | 23289a3 | 2009-10-27 07:06:36 +0000 | [diff] [blame] | 980 | unregister_netdevice_queue(dev, head); |
Jiri Pirko | 7cd43db | 2013-01-03 22:48:50 +0000 | [diff] [blame] | 981 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 982 | } |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 983 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 984 | |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 985 | static int macvlan_changelink(struct net_device *dev, |
| 986 | struct nlattr *tb[], struct nlattr *data[]) |
| 987 | { |
| 988 | struct macvlan_dev *vlan = netdev_priv(dev); |
Michael S. Tsirkin | 266e834 | 2013-08-01 13:43:19 +0300 | [diff] [blame] | 989 | enum macvlan_mode mode; |
| 990 | bool set_mode = false; |
| 991 | |
| 992 | /* Validate mode, but don't set yet: setting flags may fail. */ |
| 993 | if (data && data[IFLA_MACVLAN_MODE]) { |
| 994 | set_mode = true; |
| 995 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); |
| 996 | /* Passthrough mode can't be set or cleared dynamically */ |
| 997 | if ((mode == MACVLAN_MODE_PASSTHRU) != |
| 998 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) |
| 999 | return -EINVAL; |
| 1000 | } |
Michael S. Tsirkin | 99ffc3e | 2013-06-13 10:07:29 +0300 | [diff] [blame] | 1001 | |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 1002 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
| 1003 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); |
| 1004 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; |
Michael S. Tsirkin | 99ffc3e | 2013-06-13 10:07:29 +0300 | [diff] [blame] | 1005 | if (vlan->port->passthru && promisc) { |
| 1006 | int err; |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 1007 | |
Michael S. Tsirkin | 99ffc3e | 2013-06-13 10:07:29 +0300 | [diff] [blame] | 1008 | if (flags & MACVLAN_FLAG_NOPROMISC) |
| 1009 | err = dev_set_promiscuity(vlan->lowerdev, -1); |
| 1010 | else |
| 1011 | err = dev_set_promiscuity(vlan->lowerdev, 1); |
| 1012 | if (err < 0) |
| 1013 | return err; |
| 1014 | } |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 1015 | vlan->flags = flags; |
| 1016 | } |
Michael S. Tsirkin | 266e834 | 2013-08-01 13:43:19 +0300 | [diff] [blame] | 1017 | if (set_mode) |
| 1018 | vlan->mode = mode; |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 1019 | return 0; |
| 1020 | } |
| 1021 | |
| 1022 | static size_t macvlan_get_size(const struct net_device *dev) |
| 1023 | { |
Eric Dumazet | 01fe944 | 2013-01-17 13:30:49 -0800 | [diff] [blame] | 1024 | return (0 |
| 1025 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ |
| 1026 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ |
| 1027 | ); |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 1028 | } |
| 1029 | |
| 1030 | static int macvlan_fill_info(struct sk_buff *skb, |
| 1031 | const struct net_device *dev) |
| 1032 | { |
| 1033 | struct macvlan_dev *vlan = netdev_priv(dev); |
| 1034 | |
David S. Miller | ead9a76 | 2012-04-01 20:23:06 -0400 | [diff] [blame] | 1035 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
| 1036 | goto nla_put_failure; |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 1037 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
| 1038 | goto nla_put_failure; |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 1039 | return 0; |
| 1040 | |
| 1041 | nla_put_failure: |
| 1042 | return -EMSGSIZE; |
| 1043 | } |
| 1044 | |
| 1045 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { |
John Fastabend | df8ef8f | 2012-04-15 06:44:37 +0000 | [diff] [blame] | 1046 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
| 1047 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, |
Arnd Bergmann | 27c0b1a | 2009-11-26 06:07:11 +0000 | [diff] [blame] | 1048 | }; |
| 1049 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 1050 | int macvlan_link_register(struct rtnl_link_ops *ops) |
| 1051 | { |
| 1052 | /* common fields */ |
| 1053 | ops->priv_size = sizeof(struct macvlan_dev); |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 1054 | ops->validate = macvlan_validate; |
| 1055 | ops->maxtype = IFLA_MACVLAN_MAX; |
| 1056 | ops->policy = macvlan_policy; |
| 1057 | ops->changelink = macvlan_changelink; |
| 1058 | ops->get_size = macvlan_get_size; |
| 1059 | ops->fill_info = macvlan_fill_info; |
| 1060 | |
| 1061 | return rtnl_link_register(ops); |
| 1062 | }; |
| 1063 | EXPORT_SYMBOL_GPL(macvlan_link_register); |
| 1064 | |
| 1065 | static struct rtnl_link_ops macvlan_link_ops = { |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1066 | .kind = "macvlan", |
Herbert Xu | 8a35747 | 2010-07-21 21:44:31 +0000 | [diff] [blame] | 1067 | .setup = macvlan_setup, |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1068 | .newlink = macvlan_newlink, |
| 1069 | .dellink = macvlan_dellink, |
| 1070 | }; |
| 1071 | |
| 1072 | static int macvlan_device_event(struct notifier_block *unused, |
| 1073 | unsigned long event, void *ptr) |
| 1074 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 1075 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1076 | struct macvlan_dev *vlan, *next; |
| 1077 | struct macvlan_port *port; |
Eric Dumazet | 226bd34 | 2011-05-08 23:17:57 +0000 | [diff] [blame] | 1078 | LIST_HEAD(list_kill); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1079 | |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 1080 | if (!macvlan_port_exists(dev)) |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1081 | return NOTIFY_DONE; |
| 1082 | |
Eric Dumazet | e052f7e | 2013-03-30 10:08:44 +0000 | [diff] [blame] | 1083 | port = macvlan_port_get_rtnl(dev); |
Jiri Pirko | a35e2c1 | 2010-06-15 03:27:57 +0000 | [diff] [blame] | 1084 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1085 | switch (event) { |
| 1086 | case NETDEV_CHANGE: |
| 1087 | list_for_each_entry(vlan, &port->vlans, list) |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 1088 | netif_stacked_transfer_operstate(vlan->lowerdev, |
| 1089 | vlan->dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1090 | break; |
| 1091 | case NETDEV_FEAT_CHANGE: |
| 1092 | list_for_each_entry(vlan, &port->vlans, list) { |
Patrick McHardy | 8c2acc5 | 2009-11-23 14:18:53 -0800 | [diff] [blame] | 1093 | vlan->dev->gso_max_size = dev->gso_max_size; |
Florian Westphal | 797f87f | 2013-12-26 12:17:00 +0100 | [diff] [blame] | 1094 | netdev_update_features(vlan->dev); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1095 | } |
| 1096 | break; |
| 1097 | case NETDEV_UNREGISTER: |
David Lamparter | 3b27e10 | 2010-09-17 03:22:19 +0000 | [diff] [blame] | 1098 | /* twiddle thumbs on netns device moves */ |
| 1099 | if (dev->reg_state != NETREG_UNREGISTERING) |
| 1100 | break; |
| 1101 | |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1102 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
Eric Dumazet | 226bd34 | 2011-05-08 23:17:57 +0000 | [diff] [blame] | 1103 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
| 1104 | unregister_netdevice_many(&list_kill); |
| 1105 | list_del(&list_kill); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1106 | break; |
Jiri Pirko | 1c01fe1 | 2010-03-10 10:30:19 +0000 | [diff] [blame] | 1107 | case NETDEV_PRE_TYPE_CHANGE: |
| 1108 | /* Forbid underlaying device to change its type. */ |
| 1109 | return NOTIFY_BAD; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1110 | } |
| 1111 | return NOTIFY_DONE; |
| 1112 | } |
| 1113 | |
| 1114 | static struct notifier_block macvlan_notifier_block __read_mostly = { |
| 1115 | .notifier_call = macvlan_device_event, |
| 1116 | }; |
| 1117 | |
| 1118 | static int __init macvlan_init_module(void) |
| 1119 | { |
| 1120 | int err; |
| 1121 | |
| 1122 | register_netdevice_notifier(&macvlan_notifier_block); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1123 | |
Arnd Bergmann | fc0663d | 2010-01-30 12:23:40 +0000 | [diff] [blame] | 1124 | err = macvlan_link_register(&macvlan_link_ops); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1125 | if (err < 0) |
| 1126 | goto err1; |
| 1127 | return 0; |
| 1128 | err1: |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1129 | unregister_netdevice_notifier(&macvlan_notifier_block); |
| 1130 | return err; |
| 1131 | } |
| 1132 | |
| 1133 | static void __exit macvlan_cleanup_module(void) |
| 1134 | { |
| 1135 | rtnl_link_unregister(&macvlan_link_ops); |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 1136 | unregister_netdevice_notifier(&macvlan_notifier_block); |
| 1137 | } |
| 1138 | |
| 1139 | module_init(macvlan_init_module); |
| 1140 | module_exit(macvlan_cleanup_module); |
| 1141 | |
| 1142 | MODULE_LICENSE("GPL"); |
| 1143 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| 1144 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); |
| 1145 | MODULE_ALIAS_RTNL_LINK("macvlan"); |