blob: bc252862458385ef5d37367a643fcdf9ef5ad9af [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* -*- linux-c -*-
2 * INET 802.1Q VLAN
3 * Ethernet-type device handling.
4 *
5 * Authors: Ben Greear <greearb@candelatech.com>
Patrick McHardyad712082008-01-21 00:27:00 -08006 * Please send support related email to: netdev@vger.kernel.org
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +09008 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com>
10 * - reset skb->pkt_type on incoming packets when MAC was changed
11 * - see that changed MAC is saddr for outgoing packets
12 * Oct 20, 2001: Ard van Breeman:
13 * - Fix MC-list, finally.
14 * - Flush MC-list on VLAN destroy.
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090015 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
21 */
22
Joe Perchesafab2d22011-05-26 10:58:31 +000023#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/skbuff.h>
28#include <linux/netdevice.h>
29#include <linux/etherdevice.h>
Patrick McHardy75b88462008-07-08 03:22:42 -070030#include <linux/ethtool.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <net/arp.h>
32
33#include "vlan.h"
34#include "vlanproc.h"
35#include <linux/if_vlan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
37/*
38 * Rebuild the Ethernet MAC header. This is called after an ARP
39 * (or in future other address resolution) has completed on this
40 * sk_buff. We now let ARP fill in the other fields.
41 *
42 * This routine CANNOT use cached dst->neigh!
43 * Really, it is used only when dst->neigh is wrong.
44 *
45 * TODO: This needs a checkup, I'm ignorant here. --BLG
46 */
Patrick McHardyef3eb3e2008-01-21 00:22:11 -080047static int vlan_dev_rebuild_header(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070048{
49 struct net_device *dev = skb->dev;
50 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
51
52 switch (veth->h_vlan_encapsulated_proto) {
53#ifdef CONFIG_INET
Arnaldo Carvalho de Melo60678042008-09-20 22:20:49 -070054 case htons(ETH_P_IP):
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56 /* TODO: Confirm this will work with VLAN headers... */
57 return arp_find(veth->h_dest, skb);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090058#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 default:
Joe Perchesafab2d22011-05-26 10:58:31 +000060 pr_debug("%s: unable to resolve type %X addresses\n",
Patrick McHardy40f98e12008-01-21 00:24:30 -080061 dev->name, ntohs(veth->h_vlan_encapsulated_proto));
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090062
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
64 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -070065 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67 return 0;
68}
69
Patrick McHardy9bb85822008-07-08 03:24:44 -070070static inline u16
Patrick McHardy2029cc22008-01-21 00:26:41 -080071vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Patrick McHardy2029cc22008-01-21 00:26:41 -080073 struct vlan_priority_tci_mapping *mp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Patrick McHardy2029cc22008-01-21 00:26:41 -080075 mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)];
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 while (mp) {
77 if (mp->priority == skb->priority) {
Patrick McHardy2029cc22008-01-21 00:26:41 -080078 return mp->vlan_qos; /* This should already be shifted
79 * to mask correctly with the
80 * VLAN's TCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 }
82 mp = mp->next;
83 }
84 return 0;
85}
86
87/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090088 * Create the VLAN header for an arbitrary protocol layer
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 *
90 * saddr=NULL means use device source address
91 * daddr=NULL means leave destination address (eg unresolved arp)
92 *
93 * This is called when the SKB is moving down the stack towards the
94 * physical devices.
95 */
Patrick McHardyef3eb3e2008-01-21 00:22:11 -080096static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
97 unsigned short type,
98 const void *daddr, const void *saddr,
99 unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
101 struct vlan_hdr *vhdr;
Patrick McHardy1349fe92008-07-14 22:51:19 -0700102 unsigned int vhdrlen = 0;
Patrick McHardy9bb85822008-07-08 03:24:44 -0700103 u16 vlan_tci = 0;
Patrick McHardy1349fe92008-07-14 22:51:19 -0700104 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Patrick McHardy1349fe92008-07-14 22:51:19 -0700106 if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
108
Patrick McHardy9bb85822008-07-08 03:24:44 -0700109 vlan_tci = vlan_dev_info(dev)->vlan_id;
110 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
Patrick McHardy9bb85822008-07-08 03:24:44 -0700111 vhdr->h_vlan_TCI = htons(vlan_tci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113 /*
Octavian Purdilabf9ae532009-12-26 11:50:59 +0000114 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
115 * put the length in here instead.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 */
Octavian Purdilabf9ae532009-12-26 11:50:59 +0000117 if (type != ETH_P_802_3 && type != ETH_P_802_2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 vhdr->h_vlan_encapsulated_proto = htons(type);
Patrick McHardy2029cc22008-01-21 00:26:41 -0800119 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 vhdr->h_vlan_encapsulated_proto = htons(len);
Jerome Borsboom279e1722007-04-13 16:12:47 -0700121
122 skb->protocol = htons(ETH_P_8021Q);
Patrick McHardy1349fe92008-07-14 22:51:19 -0700123 type = ETH_P_8021Q;
124 vhdrlen = VLAN_HLEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 }
126
127 /* Before delegating work to the lower layer, enter our MAC-address */
128 if (saddr == NULL)
129 saddr = dev->dev_addr;
130
Patrick McHardy1349fe92008-07-14 22:51:19 -0700131 /* Now make the underlying real hard header */
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800132 dev = vlan_dev_info(dev)->real_dev;
Patrick McHardy1349fe92008-07-14 22:51:19 -0700133 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
134 if (rc > 0)
135 rc += vhdrlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 return rc;
137}
138
Stephen Hemminger6fef4c02009-08-31 19:50:41 +0000139static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
140 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
Eric Dumazet1a123a32009-09-03 00:39:16 +0000143 unsigned int len;
144 int ret;
David S. Miller55b01e82008-02-23 20:09:11 -0800145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
147 *
148 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
149 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
150 */
Joonwoo Park6ab3b482007-11-29 22:16:41 +1100151 if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
Patrick McHardyd80aa312008-07-14 22:51:39 -0700152 vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {
Patrick McHardy9bb85822008-07-08 03:24:44 -0700153 u16 vlan_tci;
Patrick McHardy9bb85822008-07-08 03:24:44 -0700154 vlan_tci = vlan_dev_info(dev)->vlan_id;
155 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
John Fastabend636e19a2010-10-30 14:22:42 +0000156 skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 }
158
Arnd Bergmann8a83a002010-01-30 12:23:03 +0000159 skb_set_dev(skb, vlan_dev_info(dev)->real_dev);
Eric Dumazet1a123a32009-09-03 00:39:16 +0000160 len = skb->len;
161 ret = dev_queue_xmit(skb);
162
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000163 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Eric Dumazet4af429d2010-11-10 23:42:00 +0000164 struct vlan_pcpu_stats *stats;
165
166 stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats);
167 u64_stats_update_begin(&stats->syncp);
168 stats->tx_packets++;
169 stats->tx_bytes += len;
Wei Yongjun307f73d2011-05-31 22:53:19 +0000170 u64_stats_update_end(&stats->syncp);
Eric Dumazet4af429d2010-11-10 23:42:00 +0000171 } else {
172 this_cpu_inc(vlan_dev_info(dev)->vlan_pcpu_stats->tx_dropped);
173 }
Eric Dumazet1a123a32009-09-03 00:39:16 +0000174
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000175 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176}
177
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800178static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179{
180 /* TODO: gotta make sure the underlying layer can handle it,
181 * maybe an IFF_VLAN_CAPABLE flag for devices?
182 */
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800183 if (vlan_dev_info(dev)->real_dev->mtu < new_mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 return -ERANGE;
185
186 dev->mtu = new_mtu;
187
188 return 0;
189}
190
Patrick McHardyc17d8872007-06-13 12:05:22 -0700191void vlan_dev_set_ingress_priority(const struct net_device *dev,
Patrick McHardy9bb85822008-07-08 03:24:44 -0700192 u32 skb_prio, u16 vlan_prio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800194 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardyb020cb42007-06-13 12:07:22 -0700195
196 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
197 vlan->nr_ingress_mappings--;
198 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
199 vlan->nr_ingress_mappings++;
200
201 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202}
203
Patrick McHardyc17d8872007-06-13 12:05:22 -0700204int vlan_dev_set_egress_priority(const struct net_device *dev,
Patrick McHardy9bb85822008-07-08 03:24:44 -0700205 u32 skb_prio, u16 vlan_prio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800207 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 struct vlan_priority_tci_mapping *mp = NULL;
209 struct vlan_priority_tci_mapping *np;
Eric Dumazet05423b22009-10-26 18:40:35 -0700210 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900211
Patrick McHardyc17d8872007-06-13 12:05:22 -0700212 /* See if a priority mapping exists.. */
Patrick McHardyb020cb42007-06-13 12:07:22 -0700213 mp = vlan->egress_priority_map[skb_prio & 0xF];
Patrick McHardyc17d8872007-06-13 12:05:22 -0700214 while (mp) {
215 if (mp->priority == skb_prio) {
Patrick McHardyb020cb42007-06-13 12:07:22 -0700216 if (mp->vlan_qos && !vlan_qos)
217 vlan->nr_egress_mappings--;
218 else if (!mp->vlan_qos && vlan_qos)
219 vlan->nr_egress_mappings++;
220 mp->vlan_qos = vlan_qos;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700221 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 }
Patrick McHardyc17d8872007-06-13 12:05:22 -0700223 mp = mp->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 }
Patrick McHardyc17d8872007-06-13 12:05:22 -0700225
226 /* Create a new mapping then. */
Patrick McHardyb020cb42007-06-13 12:07:22 -0700227 mp = vlan->egress_priority_map[skb_prio & 0xF];
Patrick McHardyc17d8872007-06-13 12:05:22 -0700228 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
229 if (!np)
230 return -ENOBUFS;
231
232 np->next = mp;
233 np->priority = skb_prio;
Patrick McHardyb020cb42007-06-13 12:07:22 -0700234 np->vlan_qos = vlan_qos;
235 vlan->egress_priority_map[skb_prio & 0xF] = np;
236 if (vlan_qos)
237 vlan->nr_egress_mappings++;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700238 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239}
240
Patrick McHardya4bf3af42007-06-13 12:07:37 -0700241/* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700242int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243{
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700244 struct vlan_dev_info *vlan = vlan_dev_info(dev);
245 u32 old_flags = vlan->flags;
246
Patrick McHardy5e756592009-11-25 07:54:54 +0000247 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
248 VLAN_FLAG_LOOSE_BINDING))
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700249 return -EINVAL;
250
251 vlan->flags = (old_flags & ~mask) | (flags & mask);
Patrick McHardy70c03b42008-07-05 21:26:57 -0700252
253 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
254 if (vlan->flags & VLAN_FLAG_GVRP)
255 vlan_gvrp_request_join(dev);
256 else
257 vlan_gvrp_request_leave(dev);
258 }
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700259 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260}
261
Patrick McHardyc17d8872007-06-13 12:05:22 -0700262void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800264 strncpy(result, vlan_dev_info(dev)->real_dev->name, 23);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265}
266
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800267static int vlan_dev_open(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800269 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700270 struct net_device *real_dev = vlan->real_dev;
271 int err;
272
Patrick McHardy5e756592009-11-25 07:54:54 +0000273 if (!(real_dev->flags & IFF_UP) &&
274 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 return -ENETDOWN;
276
Patrick McHardy8c979c22007-07-11 19:45:24 -0700277 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000278 err = dev_uc_add(real_dev, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700279 if (err < 0)
Wang Chen89146502008-07-14 20:59:03 -0700280 goto out;
Patrick McHardy8c979c22007-07-11 19:45:24 -0700281 }
Patrick McHardy8c979c22007-07-11 19:45:24 -0700282
Wang Chen89146502008-07-14 20:59:03 -0700283 if (dev->flags & IFF_ALLMULTI) {
284 err = dev_set_allmulti(real_dev, 1);
285 if (err < 0)
286 goto del_unicast;
287 }
288 if (dev->flags & IFF_PROMISC) {
289 err = dev_set_promiscuity(real_dev, 1);
290 if (err < 0)
291 goto clear_allmulti;
292 }
293
294 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700295
Patrick McHardy70c03b42008-07-05 21:26:57 -0700296 if (vlan->flags & VLAN_FLAG_GVRP)
297 vlan_gvrp_request_join(dev);
298
Phil Oester0ac820e2010-08-17 18:45:08 +0000299 if (netif_carrier_ok(real_dev))
300 netif_carrier_on(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 return 0;
Wang Chen89146502008-07-14 20:59:03 -0700302
303clear_allmulti:
304 if (dev->flags & IFF_ALLMULTI)
305 dev_set_allmulti(real_dev, -1);
306del_unicast:
307 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000308 dev_uc_del(real_dev, dev->dev_addr);
Wang Chen89146502008-07-14 20:59:03 -0700309out:
Jay Vosburghadc667e2009-04-25 18:03:35 -0700310 netif_carrier_off(dev);
Wang Chen89146502008-07-14 20:59:03 -0700311 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312}
313
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800314static int vlan_dev_stop(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315{
Patrick McHardy70c03b42008-07-05 21:26:57 -0700316 struct vlan_dev_info *vlan = vlan_dev_info(dev);
317 struct net_device *real_dev = vlan->real_dev;
318
Patrick McHardy56addd62007-07-14 18:53:28 -0700319 dev_mc_unsync(real_dev, dev);
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000320 dev_uc_unsync(real_dev, dev);
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700321 if (dev->flags & IFF_ALLMULTI)
322 dev_set_allmulti(real_dev, -1);
323 if (dev->flags & IFF_PROMISC)
324 dev_set_promiscuity(real_dev, -1);
325
Patrick McHardy8c979c22007-07-11 19:45:24 -0700326 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000327 dev_uc_del(real_dev, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700328
Jay Vosburghadc667e2009-04-25 18:03:35 -0700329 netif_carrier_off(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 return 0;
331}
332
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800333static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
Patrick McHardy39aaac12007-11-10 21:52:35 -0800334{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800335 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
Patrick McHardy39aaac12007-11-10 21:52:35 -0800336 struct sockaddr *addr = p;
337 int err;
338
339 if (!is_valid_ether_addr(addr->sa_data))
340 return -EADDRNOTAVAIL;
341
342 if (!(dev->flags & IFF_UP))
343 goto out;
344
345 if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) {
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000346 err = dev_uc_add(real_dev, addr->sa_data);
Patrick McHardy39aaac12007-11-10 21:52:35 -0800347 if (err < 0)
348 return err;
349 }
350
351 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000352 dev_uc_del(real_dev, dev->dev_addr);
Patrick McHardy39aaac12007-11-10 21:52:35 -0800353
354out:
355 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
356 return 0;
357}
358
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800359static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800361 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
Stephen Hemminger656299f2008-11-19 21:53:47 -0800362 const struct net_device_ops *ops = real_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 struct ifreq ifrr;
364 int err = -EOPNOTSUPP;
365
366 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
367 ifrr.ifr_ifru = ifr->ifr_ifru;
368
Patrick McHardy2029cc22008-01-21 00:26:41 -0800369 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 case SIOCGMIIPHY:
371 case SIOCGMIIREG:
372 case SIOCSMIIREG:
Stephen Hemminger656299f2008-11-19 21:53:47 -0800373 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
374 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 }
377
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900378 if (!err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 ifr->ifr_ifru = ifrr.ifr_ifru;
380
381 return err;
382}
383
Frank Blaschkacc883d12009-01-08 10:50:20 -0800384static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
385{
386 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
387 const struct net_device_ops *ops = real_dev->netdev_ops;
388 int err = 0;
389
390 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
David S. Miller9d40bbd2009-03-04 23:46:25 -0800391 err = ops->ndo_neigh_setup(real_dev, pa);
Frank Blaschkacc883d12009-01-08 10:50:20 -0800392
393 return err;
394}
395
Vasu Devb85daa52009-08-14 12:41:07 +0000396#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
397static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
398 struct scatterlist *sgl, unsigned int sgc)
399{
400 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
401 const struct net_device_ops *ops = real_dev->netdev_ops;
402 int rc = 0;
403
404 if (ops->ndo_fcoe_ddp_setup)
405 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
406
407 return rc;
408}
409
410static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
411{
412 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
413 const struct net_device_ops *ops = real_dev->netdev_ops;
414 int len = 0;
415
416 if (ops->ndo_fcoe_ddp_done)
417 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
418
419 return len;
420}
Yi Zou0af46d92009-08-31 12:31:55 +0000421
422static int vlan_dev_fcoe_enable(struct net_device *dev)
423{
424 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
425 const struct net_device_ops *ops = real_dev->netdev_ops;
426 int rc = -EINVAL;
427
428 if (ops->ndo_fcoe_enable)
429 rc = ops->ndo_fcoe_enable(real_dev);
430 return rc;
431}
432
433static int vlan_dev_fcoe_disable(struct net_device *dev)
434{
435 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
436 const struct net_device_ops *ops = real_dev->netdev_ops;
437 int rc = -EINVAL;
438
439 if (ops->ndo_fcoe_disable)
440 rc = ops->ndo_fcoe_disable(real_dev);
441 return rc;
442}
Yi Zoud6534792009-10-28 18:25:16 +0000443
444static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
445{
446 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
447 const struct net_device_ops *ops = real_dev->netdev_ops;
448 int rc = -EINVAL;
449
450 if (ops->ndo_fcoe_get_wwn)
451 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
452 return rc;
453}
Yi Zou4ea09c92011-02-01 07:22:11 +0000454
455static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
456 struct scatterlist *sgl, unsigned int sgc)
457{
458 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
459 const struct net_device_ops *ops = real_dev->netdev_ops;
460 int rc = 0;
461
462 if (ops->ndo_fcoe_ddp_target)
463 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
464
465 return rc;
466}
Vasu Devb85daa52009-08-14 12:41:07 +0000467#endif
468
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800469static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700470{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800471 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700472
Matthijs Kooijmandeede2f2011-10-31 04:53:13 +0000473 if (dev->flags & IFF_UP) {
474 if (change & IFF_ALLMULTI)
475 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
476 if (change & IFF_PROMISC)
477 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
478 }
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700479}
480
Chris Leeche83a2ea2008-01-31 16:53:23 -0800481static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800483 dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000484 dev_uc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485}
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800486
487/*
488 * vlan network devices have devices nesting below it, and are a special
489 * "super class" of normal network devices; split their locks off into a
490 * separate class since they always nest.
491 */
492static struct lock_class_key vlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700493static struct lock_class_key vlan_netdev_addr_lock_key;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800494
David S. Millere8a04642008-07-17 00:34:19 -0700495static void vlan_dev_set_lockdep_one(struct net_device *dev,
496 struct netdev_queue *txq,
497 void *_subclass)
David S. Millerc773e842008-07-08 23:13:53 -0700498{
499 lockdep_set_class_and_subclass(&txq->_xmit_lock,
David S. Millere8a04642008-07-17 00:34:19 -0700500 &vlan_netdev_xmit_lock_key,
501 *(int *)_subclass);
David S. Millerc773e842008-07-08 23:13:53 -0700502}
503
504static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
505{
David S. Millercf508b12008-07-22 14:16:42 -0700506 lockdep_set_class_and_subclass(&dev->addr_list_lock,
507 &vlan_netdev_addr_lock_key,
508 subclass);
David S. Millere8a04642008-07-17 00:34:19 -0700509 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
David S. Millerc773e842008-07-08 23:13:53 -0700510}
511
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800512static const struct header_ops vlan_header_ops = {
513 .create = vlan_dev_hard_header,
514 .rebuild = vlan_dev_rebuild_header,
515 .parse = eth_header_parse,
516};
517
Eric Dumazet213b15c2010-11-11 09:42:45 +0000518static const struct net_device_ops vlan_netdev_ops;
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800519
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800520static int vlan_dev_init(struct net_device *dev)
521{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800522 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800523 int subclass = 0;
524
Jay Vosburghadc667e2009-04-25 18:03:35 -0700525 netif_carrier_off(dev);
526
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800527 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
John Fastabend194dbcc2010-05-12 21:31:06 +0000528 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
529 IFF_MASTER | IFF_SLAVE);
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800530 dev->iflink = real_dev->ifindex;
531 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
532 (1<<__LINK_STATE_DORMANT))) |
533 (1<<__LINK_STATE_PRESENT);
534
Michał Mirosław62f2a3a2011-07-13 14:10:29 +0000535 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG |
536 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO |
537 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM |
538 NETIF_F_ALL_FCOE;
539
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700540 dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
Alexander Duyck1ae4be22008-09-11 20:17:05 -0700541 dev->gso_max_size = real_dev->gso_max_size;
Patrick McHardy5fb13572008-05-20 14:54:50 -0700542
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800543 /* ipv6 shared card related stuff */
544 dev->dev_id = real_dev->dev_id;
545
546 if (is_zero_ether_addr(dev->dev_addr))
547 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
548 if (is_zero_ether_addr(dev->broadcast))
549 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
550
Vasu Devb85daa52009-08-14 12:41:07 +0000551#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
552 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
553#endif
554
Eric Dumazetd870bfb2011-03-18 00:27:27 +0000555 dev->needed_headroom = real_dev->needed_headroom;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800556 if (real_dev->features & NETIF_F_HW_VLAN_TX) {
557 dev->header_ops = real_dev->header_ops;
558 dev->hard_header_len = real_dev->hard_header_len;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800559 } else {
560 dev->header_ops = &vlan_header_ops;
561 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800562 }
563
Eric Dumazet213b15c2010-11-11 09:42:45 +0000564 dev->netdev_ops = &vlan_netdev_ops;
John Fastabend636e19a2010-10-30 14:22:42 +0000565
Joonwoo Park26a25232008-07-08 03:22:16 -0700566 if (is_vlan_dev(real_dev))
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800567 subclass = 1;
568
David S. Millerc773e842008-07-08 23:13:53 -0700569 vlan_dev_set_lockdep_class(dev, subclass);
Eric Dumazet97932412009-11-17 04:53:09 +0000570
Eric Dumazet4af429d2010-11-10 23:42:00 +0000571 vlan_dev_info(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
572 if (!vlan_dev_info(dev)->vlan_pcpu_stats)
Eric Dumazet97932412009-11-17 04:53:09 +0000573 return -ENOMEM;
574
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800575 return 0;
576}
577
Pavel Emelyanov23556322008-04-04 12:45:12 -0700578static void vlan_dev_uninit(struct net_device *dev)
579{
580 struct vlan_priority_tci_mapping *pm;
581 struct vlan_dev_info *vlan = vlan_dev_info(dev);
582 int i;
583
Eric Dumazet4af429d2010-11-10 23:42:00 +0000584 free_percpu(vlan->vlan_pcpu_stats);
585 vlan->vlan_pcpu_stats = NULL;
Pavel Emelyanov23556322008-04-04 12:45:12 -0700586 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
587 while ((pm = vlan->egress_priority_map[i]) != NULL) {
588 vlan->egress_priority_map[i] = pm->next;
589 kfree(pm);
590 }
591 }
592}
593
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700594static u32 vlan_dev_fix_features(struct net_device *dev, u32 features)
595{
596 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
Shan Wei712ae512011-07-05 20:43:12 -0700597 u32 old_features = features;
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700598
Michał Mirosławf0a619c2011-05-06 07:56:29 +0000599 features &= real_dev->features;
600 features &= real_dev->vlan_features;
Shan Wei712ae512011-07-05 20:43:12 -0700601
Michał Mirosław6c9c1b52011-07-14 14:39:29 -0700602 features |= old_features & NETIF_F_SOFT_FEATURES;
Shan Wei712ae512011-07-05 20:43:12 -0700603
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700604 if (dev_ethtool_get_rx_csum(real_dev))
605 features |= NETIF_F_RXCSUM;
Michał Mirosławf0a619c2011-05-06 07:56:29 +0000606 features |= NETIF_F_LLTX;
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700607
608 return features;
609}
610
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700611static int vlan_ethtool_get_settings(struct net_device *dev,
612 struct ethtool_cmd *cmd)
613{
614 const struct vlan_dev_info *vlan = vlan_dev_info(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000615
616 return __ethtool_get_settings(vlan->real_dev, cmd);
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700617}
618
619static void vlan_ethtool_get_drvinfo(struct net_device *dev,
620 struct ethtool_drvinfo *info)
621{
622 strcpy(info->driver, vlan_fullname);
623 strcpy(info->version, vlan_version);
624 strcpy(info->fw_version, "N/A");
625}
626
Eric Dumazet28172732010-07-07 14:58:56 -0700627static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
Eric Dumazet97932412009-11-17 04:53:09 +0000628{
Eric Dumazet97932412009-11-17 04:53:09 +0000629
Eric Dumazet4af429d2010-11-10 23:42:00 +0000630 if (vlan_dev_info(dev)->vlan_pcpu_stats) {
631 struct vlan_pcpu_stats *p;
632 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazet97932412009-11-17 04:53:09 +0000633 int i;
634
635 for_each_possible_cpu(i) {
Eric Dumazet4af429d2010-11-10 23:42:00 +0000636 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000637 unsigned int start;
638
Eric Dumazet4af429d2010-11-10 23:42:00 +0000639 p = per_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats, i);
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000640 do {
641 start = u64_stats_fetch_begin_bh(&p->syncp);
642 rxpackets = p->rx_packets;
643 rxbytes = p->rx_bytes;
644 rxmulticast = p->rx_multicast;
Eric Dumazet4af429d2010-11-10 23:42:00 +0000645 txpackets = p->tx_packets;
646 txbytes = p->tx_bytes;
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000647 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
Eric Dumazet4af429d2010-11-10 23:42:00 +0000648
649 stats->rx_packets += rxpackets;
650 stats->rx_bytes += rxbytes;
651 stats->multicast += rxmulticast;
652 stats->tx_packets += txpackets;
653 stats->tx_bytes += txbytes;
654 /* rx_errors & tx_dropped are u32 */
655 rx_errors += p->rx_errors;
656 tx_dropped += p->tx_dropped;
Eric Dumazet97932412009-11-17 04:53:09 +0000657 }
Eric Dumazet4af429d2010-11-10 23:42:00 +0000658 stats->rx_errors = rx_errors;
659 stats->tx_dropped = tx_dropped;
Eric Dumazet97932412009-11-17 04:53:09 +0000660 }
661 return stats;
662}
663
Patrick McHardy75b88462008-07-08 03:22:42 -0700664static const struct ethtool_ops vlan_ethtool_ops = {
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700665 .get_settings = vlan_ethtool_get_settings,
666 .get_drvinfo = vlan_ethtool_get_drvinfo,
Patrick McHardy75b88462008-07-08 03:22:42 -0700667 .get_link = ethtool_op_get_link,
Patrick McHardy75b88462008-07-08 03:22:42 -0700668};
669
Stephen Hemminger656299f2008-11-19 21:53:47 -0800670static const struct net_device_ops vlan_netdev_ops = {
671 .ndo_change_mtu = vlan_dev_change_mtu,
672 .ndo_init = vlan_dev_init,
673 .ndo_uninit = vlan_dev_uninit,
674 .ndo_open = vlan_dev_open,
675 .ndo_stop = vlan_dev_stop,
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800676 .ndo_start_xmit = vlan_dev_hard_start_xmit,
677 .ndo_validate_addr = eth_validate_addr,
678 .ndo_set_mac_address = vlan_dev_set_mac_address,
679 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800680 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
681 .ndo_do_ioctl = vlan_dev_ioctl,
Frank Blaschkacc883d12009-01-08 10:50:20 -0800682 .ndo_neigh_setup = vlan_dev_neigh_setup,
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000683 .ndo_get_stats64 = vlan_dev_get_stats64,
Vasu Devb85daa52009-08-14 12:41:07 +0000684#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
685 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
686 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
Yi Zou0af46d92009-08-31 12:31:55 +0000687 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
688 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
Yi Zoud6534792009-10-28 18:25:16 +0000689 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
Yi Zou4ea09c92011-02-01 07:22:11 +0000690 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
Vasu Devb85daa52009-08-14 12:41:07 +0000691#endif
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700692 .ndo_fix_features = vlan_dev_fix_features,
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800693};
694
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800695void vlan_setup(struct net_device *dev)
696{
697 ether_setup(dev);
698
699 dev->priv_flags |= IFF_802_1Q_VLAN;
Neil Horman550fd082011-07-26 06:05:38 +0000700 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800701 dev->tx_queue_len = 0;
702
Stephen Hemminger656299f2008-11-19 21:53:47 -0800703 dev->netdev_ops = &vlan_netdev_ops;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800704 dev->destructor = free_netdev;
Patrick McHardy75b88462008-07-08 03:22:42 -0700705 dev->ethtool_ops = &vlan_ethtool_ops;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800706
707 memset(dev->broadcast, 0, ETH_ALEN);
708}