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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Ethernet-type device handling.
7 *
8 * Version: @(#)eth.c 1.0.7 05/25/93
9 *
Jesper Juhl02c30a82005-05-05 16:16:16 -070010 * Authors: Ross Biro
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Mark Evans, <evansmp@uhura.aston.ac.uk>
13 * Florian La Roche, <rzsfl@rz.uni-sb.de>
14 * Alan Cox, <gw4pts@gw4pts.ampr.org>
YOSHIFUJI Hideaki03d52d72007-02-09 23:24:44 +090015 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 * Fixes:
17 * Mr Linux : Arp problems
18 * Alan Cox : Generic queue tidyup (very tiny here)
19 * Alan Cox : eth_header ntohs should be htons
20 * Alan Cox : eth_rebuild_header missing an htons and
21 * minor other things.
YOSHIFUJI Hideaki03d52d72007-02-09 23:24:44 +090022 * Tegge : Arp bug fixes.
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 * Florian : Removed many unnecessary functions, code cleanup
24 * and changes for new arp and skbuff.
25 * Alan Cox : Redid header building to reflect new format.
26 * Alan Cox : ARP only when compiled with CONFIG_INET
27 * Greg Page : 802.2 and SNAP stuff.
28 * Alan Cox : MAC layer pointers/new format.
29 * Paul Gortmaker : eth_copy_and_sum shouldn't csum padding.
30 * Alan Cox : Protect against forwarding explosions with
31 * older network drivers and IFF_ALLMULTI.
32 * Christer Weinigel : Better rebuild header message.
33 * Andrew Morton : 26Feb01: kill ether_setup() - use netdev_boot_setup().
34 *
35 * This program is free software; you can redistribute it and/or
36 * modify it under the terms of the GNU General Public License
37 * as published by the Free Software Foundation; either version
38 * 2 of the License, or (at your option) any later version.
39 */
40#include <linux/module.h>
41#include <linux/types.h>
42#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/string.h>
44#include <linux/mm.h>
45#include <linux/socket.h>
46#include <linux/in.h>
47#include <linux/inet.h>
48#include <linux/ip.h>
49#include <linux/netdevice.h>
50#include <linux/etherdevice.h>
51#include <linux/skbuff.h>
52#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include <linux/init.h>
Kris Katterjohn46f25df2006-01-05 16:35:42 -080054#include <linux/if_ether.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include <net/dst.h>
56#include <net/arp.h>
57#include <net/sock.h>
58#include <net/ipv6.h>
59#include <net/ip.h>
Lennert Buytenhekcf85d082008-10-07 13:45:02 +000060#include <net/dsa.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <asm/uaccess.h>
62#include <asm/system.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Linus Torvalds1da177e2005-04-16 15:20:36 -070064__setup("ether=", netdev_boot_setup);
65
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -070066/**
67 * eth_header - create the Ethernet header
68 * @skb: buffer to alter
69 * @dev: source device
70 * @type: Ethernet type field
71 * @daddr: destination address (NULL leave destination address)
72 * @saddr: source address (NULL use device source address)
73 * @len: packet length (<= skb->len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 *
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -070075 *
Octavian Purdilabf9ae532009-12-26 11:50:59 +000076 * Set the protocol type. For a packet of type ETH_P_802_3/2 we put the length
77 * in here instead.
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 */
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -070079int eth_header(struct sk_buff *skb, struct net_device *dev,
80 unsigned short type,
81 const void *daddr, const void *saddr, unsigned len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070082{
Stephen Hemminger2e4ca752006-08-17 18:20:18 -070083 struct ethhdr *eth = (struct ethhdr *)skb_push(skb, ETH_HLEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
Octavian Purdilabf9ae532009-12-26 11:50:59 +000085 if (type != ETH_P_802_3 && type != ETH_P_802_2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 eth->h_proto = htons(type);
87 else
88 eth->h_proto = htons(len);
89
90 /*
Stephen Hemminger2e4ca752006-08-17 18:20:18 -070091 * Set the source hardware address.
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Stephen Hemminger2e4ca752006-08-17 18:20:18 -070094 if (!saddr)
95 saddr = dev->dev_addr;
Stephen Hemminger23f1f4e2007-08-24 22:35:44 -070096 memcpy(eth->h_source, saddr, ETH_ALEN);
Stephen Hemminger2e4ca752006-08-17 18:20:18 -070097
98 if (daddr) {
Stephen Hemminger23f1f4e2007-08-24 22:35:44 -070099 memcpy(eth->h_dest, daddr, ETH_ALEN);
Jamal Hadi Salimf8d0e3f2006-02-23 16:18:01 -0800100 return ETH_HLEN;
101 }
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 /*
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700104 * Anyway, the loopback-device should never use this function...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 */
106
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700107 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
Stephen Hemminger23f1f4e2007-08-24 22:35:44 -0700108 memset(eth->h_dest, 0, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 return ETH_HLEN;
110 }
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 return -ETH_HLEN;
113}
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700114EXPORT_SYMBOL(eth_header);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700116/**
117 * eth_rebuild_header- rebuild the Ethernet MAC header.
118 * @skb: socket buffer to update
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 *
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700120 * This is called after an ARP or IPV6 ndisc it's resolution on this
121 * sk_buff. We now let protocol (ARP) fill in the other fields.
122 *
123 * This routine CANNOT use cached dst->neigh!
124 * Really, it is used only when dst->neigh is wrong.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126int eth_rebuild_header(struct sk_buff *skb)
127{
128 struct ethhdr *eth = (struct ethhdr *)skb->data;
129 struct net_device *dev = skb->dev;
130
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700131 switch (eth->h_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132#ifdef CONFIG_INET
Arnaldo Carvalho de Melo60678042008-09-20 22:20:49 -0700133 case htons(ETH_P_IP):
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700134 return arp_find(eth->h_dest, skb);
135#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 default:
137 printk(KERN_DEBUG
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700138 "%s: unable to resolve type %X addresses.\n",
Johannes Bergb002a862010-04-20 21:06:07 +0000139 dev->name, ntohs(eth->h_proto));
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700140
Stephen Hemminger23f1f4e2007-08-24 22:35:44 -0700141 memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 break;
143 }
144
145 return 0;
146}
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700147EXPORT_SYMBOL(eth_rebuild_header);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700149/**
150 * eth_type_trans - determine the packet's protocol ID.
151 * @skb: received socket data
152 * @dev: receiving network device
153 *
154 * The rule here is that we
155 * assume 802.3 if the type field is short enough to be a length.
156 * This is normal practice and works for any 'now in use' protocol.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 */
Alexey Dobriyanab611482005-07-12 12:08:43 -0700158__be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159{
160 struct ethhdr *eth;
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700161
Arnaldo Carvalho de Melo4c13eb62007-04-25 17:40:23 -0700162 skb->dev = dev;
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -0700163 skb_reset_mac_header(skb);
David S. Miller47d29642010-05-02 02:21:44 -0700164 skb_pull_inline(skb, ETH_HLEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 eth = eth_hdr(skb);
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700166
Eric Dumazet1f87e232008-11-23 23:24:32 -0800167 if (unlikely(is_multicast_ether_addr(eth->h_dest))) {
168 if (!compare_ether_addr_64bits(eth->h_dest, dev->broadcast))
David S. Millerba645c12005-09-27 16:03:05 -0700169 skb->pkt_type = PACKET_BROADCAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 else
David S. Millerba645c12005-09-27 16:03:05 -0700171 skb->pkt_type = PACKET_MULTICAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 }
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 /*
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700175 * This ALLMULTI check should be redundant by 1.4
176 * so don't forget to remove it.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 *
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700178 * Seems, you forgot to remove it. All silly devices
179 * seems to set IFF_PROMISC.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 */
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700181
182 else if (1 /*dev->flags&IFF_PROMISC */ ) {
Eric Dumazet1f87e232008-11-23 23:24:32 -0800183 if (unlikely(compare_ether_addr_64bits(eth->h_dest, dev->dev_addr)))
David S. Millerba645c12005-09-27 16:03:05 -0700184 skb->pkt_type = PACKET_OTHERHOST;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 }
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700186
Lennert Buytenhekcf85d082008-10-07 13:45:02 +0000187 /*
188 * Some variants of DSA tagging don't have an ethertype field
189 * at all, so we check here whether one of those tagging
190 * variants has been configured on the receiving interface,
191 * and if so, set skb->protocol without looking at the packet.
192 */
193 if (netdev_uses_dsa_tags(dev))
194 return htons(ETH_P_DSA);
Lennert Buytenhek396138f02008-10-07 13:46:07 +0000195 if (netdev_uses_trailer_tags(dev))
196 return htons(ETH_P_TRAILER);
Lennert Buytenhekcf85d082008-10-07 13:45:02 +0000197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 if (ntohs(eth->h_proto) >= 1536)
199 return eth->h_proto;
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 /*
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700202 * This is a magic hack to spot IPX packets. Older Novell breaks
203 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
204 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
205 * won't work for fault tolerant netware but does for the rest.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 */
Changli Gaod8d1f302010-06-10 23:31:35 -0700207 if (skb->len >= 2 && *(unsigned short *)(skb->data) == 0xFFFF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 return htons(ETH_P_802_3);
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700209
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 /*
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700211 * Real 802.2 LLC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 */
213 return htons(ETH_P_802_2);
214}
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700215EXPORT_SYMBOL(eth_type_trans);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700217/**
218 * eth_header_parse - extract hardware address from packet
219 * @skb: packet to extract header from
220 * @haddr: destination buffer
221 */
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700222int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223{
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700224 const struct ethhdr *eth = eth_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 memcpy(haddr, eth->h_source, ETH_ALEN);
226 return ETH_ALEN;
227}
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700228EXPORT_SYMBOL(eth_header_parse);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700230/**
231 * eth_header_cache - fill cache entry from neighbour
232 * @neigh: source neighbour
233 * @hh: destination cache entry
234 * Create an Ethernet header template from the neighbour.
235 */
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700236int eth_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
Al Virod77072e2006-09-28 14:20:34 -0700238 __be16 type = hh->hh_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 struct ethhdr *eth;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700240 const struct net_device *dev = neigh->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700242 eth = (struct ethhdr *)
243 (((u8 *) hh->hh_data) + (HH_DATA_OFF(sizeof(*eth))));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
YOSHIFUJI Hideakif576e242007-03-07 14:19:03 +0900245 if (type == htons(ETH_P_802_3))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 return -1;
247
248 eth->h_proto = type;
Stephen Hemminger23f1f4e2007-08-24 22:35:44 -0700249 memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
250 memcpy(eth->h_dest, neigh->ha, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 hh->hh_len = ETH_HLEN;
252 return 0;
253}
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700254EXPORT_SYMBOL(eth_header_cache);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700256/**
257 * eth_header_cache_update - update cache entry
258 * @hh: destination cache entry
259 * @dev: network device
260 * @haddr: new hardware address
261 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 * Called by Address Resolution module to notify changes in address.
263 */
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700264void eth_header_cache_update(struct hh_cache *hh,
265 const struct net_device *dev,
266 const unsigned char *haddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267{
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700268 memcpy(((u8 *) hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)),
Stephen Hemminger23f1f4e2007-08-24 22:35:44 -0700269 haddr, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270}
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700271EXPORT_SYMBOL(eth_header_cache_update);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700273/**
274 * eth_mac_addr - set new Ethernet hardware address
275 * @dev: network device
276 * @p: socket address
277 * Change hardware address of device.
278 *
279 * This doesn't change hardware matching, so needs to be overridden
280 * for most real devices.
281 */
Stephen Hemmingerccad6372008-11-19 22:42:31 -0800282int eth_mac_addr(struct net_device *dev, void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700284 struct sockaddr *addr = p;
Patrick McHardy71bffe52007-07-11 19:41:18 -0700285
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 if (netif_running(dev))
287 return -EBUSY;
Patrick McHardy71bffe52007-07-11 19:41:18 -0700288 if (!is_valid_ether_addr(addr->sa_data))
289 return -EADDRNOTAVAIL;
Stephen Hemminger23f1f4e2007-08-24 22:35:44 -0700290 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 return 0;
292}
Stephen Hemmingerccad6372008-11-19 22:42:31 -0800293EXPORT_SYMBOL(eth_mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700295/**
296 * eth_change_mtu - set new MTU size
297 * @dev: network device
298 * @new_mtu: new Maximum Transfer Unit
299 *
300 * Allow changing MTU size. Needs to be overridden for devices
301 * supporting jumbo frames.
302 */
Stephen Hemmingerccad6372008-11-19 22:42:31 -0800303int eth_change_mtu(struct net_device *dev, int new_mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304{
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800305 if (new_mtu < 68 || new_mtu > ETH_DATA_LEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 return -EINVAL;
307 dev->mtu = new_mtu;
308 return 0;
309}
Stephen Hemmingerccad6372008-11-19 22:42:31 -0800310EXPORT_SYMBOL(eth_change_mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
Stephen Hemmingerccad6372008-11-19 22:42:31 -0800312int eth_validate_addr(struct net_device *dev)
Jeff Garzikbada3392007-10-23 20:19:37 -0700313{
314 if (!is_valid_ether_addr(dev->dev_addr))
Patrick McHardy2ed99262008-04-13 22:45:40 -0700315 return -EADDRNOTAVAIL;
Jeff Garzikbada3392007-10-23 20:19:37 -0700316
317 return 0;
318}
Stephen Hemmingerccad6372008-11-19 22:42:31 -0800319EXPORT_SYMBOL(eth_validate_addr);
Jeff Garzikbada3392007-10-23 20:19:37 -0700320
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700321const struct header_ops eth_header_ops ____cacheline_aligned = {
322 .create = eth_header,
323 .parse = eth_header_parse,
324 .rebuild = eth_rebuild_header,
325 .cache = eth_header_cache,
326 .cache_update = eth_header_cache_update,
327};
328
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700329/**
330 * ether_setup - setup Ethernet network device
331 * @dev: network device
332 * Fill in the fields of the device structure with Ethernet-generic values.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 */
334void ether_setup(struct net_device *dev)
335{
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700336 dev->header_ops = &eth_header_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 dev->type = ARPHRD_ETHER;
338 dev->hard_header_len = ETH_HLEN;
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800339 dev->mtu = ETH_DATA_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 dev->addr_len = ETH_ALEN;
YOSHIFUJI Hideaki03d52d72007-02-09 23:24:44 +0900341 dev->tx_queue_len = 1000; /* Ethernet wants good queues */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 dev->flags = IFF_BROADCAST|IFF_MULTICAST;
YOSHIFUJI Hideaki03d52d72007-02-09 23:24:44 +0900343
Stephen Hemminger2e4ca752006-08-17 18:20:18 -0700344 memset(dev->broadcast, 0xFF, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
346}
347EXPORT_SYMBOL(ether_setup);
348
349/**
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700350 * alloc_etherdev_mq - Allocates and sets up an Ethernet device
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 * @sizeof_priv: Size of additional driver-private structure to be allocated
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700352 * for this Ethernet device
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700353 * @queue_count: The number of queues this device has.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 *
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700355 * Fill in the fields of the device structure with Ethernet-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 * values. Basically does everything except registering the device.
357 *
358 * Constructs a new net device, complete with a private data area of
Stephen Hemmingerd3e01f72006-08-17 18:18:53 -0700359 * size (sizeof_priv). A 32-byte (not bit) alignment is enforced for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 * this private data area.
361 */
362
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700363struct net_device *alloc_etherdev_mq(int sizeof_priv, unsigned int queue_count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364{
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700365 return alloc_netdev_mq(sizeof_priv, "eth%d", ether_setup, queue_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366}
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700367EXPORT_SYMBOL(alloc_etherdev_mq);
Joe Perches0795af52007-10-03 17:59:30 -0700368
Michael Chan7ffc49a2007-12-24 21:28:09 -0800369static size_t _format_mac_addr(char *buf, int buflen,
Changli Gao53f91dc2010-08-24 13:32:58 +0000370 const unsigned char *addr, int len)
Joe Perches0795af52007-10-03 17:59:30 -0700371{
Michael Chan7ffc49a2007-12-24 21:28:09 -0800372 int i;
373 char *cp = buf;
374
375 for (i = 0; i < len; i++) {
376 cp += scnprintf(cp, buflen - (cp - buf), "%02x", addr[i]);
377 if (i == len - 1)
378 break;
Changli Gao53f91dc2010-08-24 13:32:58 +0000379 cp += scnprintf(cp, buflen - (cp - buf), ":");
Michael Chan7ffc49a2007-12-24 21:28:09 -0800380 }
381 return cp - buf;
382}
383
384ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len)
385{
386 size_t l;
387
388 l = _format_mac_addr(buf, PAGE_SIZE, addr, len);
Changli Gao53f91dc2010-08-24 13:32:58 +0000389 l += scnprintf(buf + l, PAGE_SIZE - l, "\n");
Eric Dumazeta02cec22010-09-22 20:43:57 +0000390 return (ssize_t)l;
Michael Chan7ffc49a2007-12-24 21:28:09 -0800391}
392EXPORT_SYMBOL(sysfs_format_mac);