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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
23#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/skbuff.h>
26#include <linux/netdevice.h>
27#include <linux/etherdevice.h>
Patrick McHardy75b88462008-07-08 03:22:42 -070028#include <linux/ethtool.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <net/arp.h>
30
31#include "vlan.h"
32#include "vlanproc.h"
33#include <linux/if_vlan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
35/*
36 * Rebuild the Ethernet MAC header. This is called after an ARP
37 * (or in future other address resolution) has completed on this
38 * sk_buff. We now let ARP fill in the other fields.
39 *
40 * This routine CANNOT use cached dst->neigh!
41 * Really, it is used only when dst->neigh is wrong.
42 *
43 * TODO: This needs a checkup, I'm ignorant here. --BLG
44 */
Patrick McHardyef3eb3e2008-01-21 00:22:11 -080045static int vlan_dev_rebuild_header(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
47 struct net_device *dev = skb->dev;
48 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
49
50 switch (veth->h_vlan_encapsulated_proto) {
51#ifdef CONFIG_INET
Arnaldo Carvalho de Melo60678042008-09-20 22:20:49 -070052 case htons(ETH_P_IP):
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54 /* TODO: Confirm this will work with VLAN headers... */
55 return arp_find(veth->h_dest, skb);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090056#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 default:
Patrick McHardy40f98e12008-01-21 00:24:30 -080058 pr_debug("%s: unable to resolve type %X addresses.\n",
59 dev->name, ntohs(veth->h_vlan_encapsulated_proto));
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090060
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
62 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -070063 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65 return 0;
66}
67
Patrick McHardy9bb85822008-07-08 03:24:44 -070068static inline u16
Patrick McHardy2029cc22008-01-21 00:26:41 -080069vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
Patrick McHardy2029cc22008-01-21 00:26:41 -080071 struct vlan_priority_tci_mapping *mp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Patrick McHardy2029cc22008-01-21 00:26:41 -080073 mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)];
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 while (mp) {
75 if (mp->priority == skb->priority) {
Patrick McHardy2029cc22008-01-21 00:26:41 -080076 return mp->vlan_qos; /* This should already be shifted
77 * to mask correctly with the
78 * VLAN's TCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 }
80 mp = mp->next;
81 }
82 return 0;
83}
84
85/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090086 * Create the VLAN header for an arbitrary protocol layer
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 *
88 * saddr=NULL means use device source address
89 * daddr=NULL means leave destination address (eg unresolved arp)
90 *
91 * This is called when the SKB is moving down the stack towards the
92 * physical devices.
93 */
Patrick McHardyef3eb3e2008-01-21 00:22:11 -080094static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
95 unsigned short type,
96 const void *daddr, const void *saddr,
97 unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070098{
99 struct vlan_hdr *vhdr;
Patrick McHardy1349fe92008-07-14 22:51:19 -0700100 unsigned int vhdrlen = 0;
Patrick McHardy9bb85822008-07-08 03:24:44 -0700101 u16 vlan_tci = 0;
Patrick McHardy1349fe92008-07-14 22:51:19 -0700102 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Patrick McHardy1349fe92008-07-14 22:51:19 -0700104 if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
106
Patrick McHardy9bb85822008-07-08 03:24:44 -0700107 vlan_tci = vlan_dev_info(dev)->vlan_id;
108 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
Patrick McHardy9bb85822008-07-08 03:24:44 -0700109 vhdr->h_vlan_TCI = htons(vlan_tci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
111 /*
Octavian Purdilabf9ae532009-12-26 11:50:59 +0000112 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
113 * put the length in here instead.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 */
Octavian Purdilabf9ae532009-12-26 11:50:59 +0000115 if (type != ETH_P_802_3 && type != ETH_P_802_2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 vhdr->h_vlan_encapsulated_proto = htons(type);
Patrick McHardy2029cc22008-01-21 00:26:41 -0800117 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 vhdr->h_vlan_encapsulated_proto = htons(len);
Jerome Borsboom279e1722007-04-13 16:12:47 -0700119
120 skb->protocol = htons(ETH_P_8021Q);
Patrick McHardy1349fe92008-07-14 22:51:19 -0700121 type = ETH_P_8021Q;
122 vhdrlen = VLAN_HLEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 }
124
125 /* Before delegating work to the lower layer, enter our MAC-address */
126 if (saddr == NULL)
127 saddr = dev->dev_addr;
128
Patrick McHardy1349fe92008-07-14 22:51:19 -0700129 /* Now make the underlying real hard header */
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800130 dev = vlan_dev_info(dev)->real_dev;
Patrick McHardy1349fe92008-07-14 22:51:19 -0700131 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
132 if (rc > 0)
133 rc += vhdrlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 return rc;
135}
136
Stephen Hemminger6fef4c02009-08-31 19:50:41 +0000137static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
138 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
Eric Dumazet1a123a32009-09-03 00:39:16 +0000141 unsigned int len;
142 int ret;
David S. Miller55b01e82008-02-23 20:09:11 -0800143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
145 *
146 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
147 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
148 */
Joonwoo Park6ab3b482007-11-29 22:16:41 +1100149 if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
Patrick McHardyd80aa312008-07-14 22:51:39 -0700150 vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {
Patrick McHardy9bb85822008-07-08 03:24:44 -0700151 u16 vlan_tci;
Patrick McHardy9bb85822008-07-08 03:24:44 -0700152 vlan_tci = vlan_dev_info(dev)->vlan_id;
153 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
John Fastabend636e19a2010-10-30 14:22:42 +0000154 skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 }
156
Arnd Bergmann8a83a002010-01-30 12:23:03 +0000157 skb_set_dev(skb, vlan_dev_info(dev)->real_dev);
Eric Dumazet1a123a32009-09-03 00:39:16 +0000158 len = skb->len;
159 ret = dev_queue_xmit(skb);
160
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000161 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Eric Dumazet4af429d2010-11-10 23:42:00 +0000162 struct vlan_pcpu_stats *stats;
163
164 stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats);
165 u64_stats_update_begin(&stats->syncp);
166 stats->tx_packets++;
167 stats->tx_bytes += len;
168 u64_stats_update_begin(&stats->syncp);
169 } else {
170 this_cpu_inc(vlan_dev_info(dev)->vlan_pcpu_stats->tx_dropped);
171 }
Eric Dumazet1a123a32009-09-03 00:39:16 +0000172
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000173 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800176static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177{
178 /* TODO: gotta make sure the underlying layer can handle it,
179 * maybe an IFF_VLAN_CAPABLE flag for devices?
180 */
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800181 if (vlan_dev_info(dev)->real_dev->mtu < new_mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 return -ERANGE;
183
184 dev->mtu = new_mtu;
185
186 return 0;
187}
188
Patrick McHardyc17d8872007-06-13 12:05:22 -0700189void vlan_dev_set_ingress_priority(const struct net_device *dev,
Patrick McHardy9bb85822008-07-08 03:24:44 -0700190 u32 skb_prio, u16 vlan_prio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800192 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardyb020cb42007-06-13 12:07:22 -0700193
194 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
195 vlan->nr_ingress_mappings--;
196 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
197 vlan->nr_ingress_mappings++;
198
199 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200}
201
Patrick McHardyc17d8872007-06-13 12:05:22 -0700202int vlan_dev_set_egress_priority(const struct net_device *dev,
Patrick McHardy9bb85822008-07-08 03:24:44 -0700203 u32 skb_prio, u16 vlan_prio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800205 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 struct vlan_priority_tci_mapping *mp = NULL;
207 struct vlan_priority_tci_mapping *np;
Eric Dumazet05423b22009-10-26 18:40:35 -0700208 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900209
Patrick McHardyc17d8872007-06-13 12:05:22 -0700210 /* See if a priority mapping exists.. */
Patrick McHardyb020cb42007-06-13 12:07:22 -0700211 mp = vlan->egress_priority_map[skb_prio & 0xF];
Patrick McHardyc17d8872007-06-13 12:05:22 -0700212 while (mp) {
213 if (mp->priority == skb_prio) {
Patrick McHardyb020cb42007-06-13 12:07:22 -0700214 if (mp->vlan_qos && !vlan_qos)
215 vlan->nr_egress_mappings--;
216 else if (!mp->vlan_qos && vlan_qos)
217 vlan->nr_egress_mappings++;
218 mp->vlan_qos = vlan_qos;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700219 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 }
Patrick McHardyc17d8872007-06-13 12:05:22 -0700221 mp = mp->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 }
Patrick McHardyc17d8872007-06-13 12:05:22 -0700223
224 /* Create a new mapping then. */
Patrick McHardyb020cb42007-06-13 12:07:22 -0700225 mp = vlan->egress_priority_map[skb_prio & 0xF];
Patrick McHardyc17d8872007-06-13 12:05:22 -0700226 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
227 if (!np)
228 return -ENOBUFS;
229
230 np->next = mp;
231 np->priority = skb_prio;
Patrick McHardyb020cb42007-06-13 12:07:22 -0700232 np->vlan_qos = vlan_qos;
233 vlan->egress_priority_map[skb_prio & 0xF] = np;
234 if (vlan_qos)
235 vlan->nr_egress_mappings++;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700236 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237}
238
Patrick McHardya4bf3af42007-06-13 12:07:37 -0700239/* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700240int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700242 struct vlan_dev_info *vlan = vlan_dev_info(dev);
243 u32 old_flags = vlan->flags;
244
Patrick McHardy5e756592009-11-25 07:54:54 +0000245 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
246 VLAN_FLAG_LOOSE_BINDING))
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700247 return -EINVAL;
248
249 vlan->flags = (old_flags & ~mask) | (flags & mask);
Patrick McHardy70c03b42008-07-05 21:26:57 -0700250
251 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
252 if (vlan->flags & VLAN_FLAG_GVRP)
253 vlan_gvrp_request_join(dev);
254 else
255 vlan_gvrp_request_leave(dev);
256 }
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700257 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258}
259
Patrick McHardyc17d8872007-06-13 12:05:22 -0700260void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800262 strncpy(result, vlan_dev_info(dev)->real_dev->name, 23);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263}
264
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800265static int vlan_dev_open(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800267 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700268 struct net_device *real_dev = vlan->real_dev;
269 int err;
270
Patrick McHardy5e756592009-11-25 07:54:54 +0000271 if (!(real_dev->flags & IFF_UP) &&
272 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 return -ENETDOWN;
274
Patrick McHardy8c979c22007-07-11 19:45:24 -0700275 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000276 err = dev_uc_add(real_dev, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700277 if (err < 0)
Wang Chen89146502008-07-14 20:59:03 -0700278 goto out;
Patrick McHardy8c979c22007-07-11 19:45:24 -0700279 }
Patrick McHardy8c979c22007-07-11 19:45:24 -0700280
Wang Chen89146502008-07-14 20:59:03 -0700281 if (dev->flags & IFF_ALLMULTI) {
282 err = dev_set_allmulti(real_dev, 1);
283 if (err < 0)
284 goto del_unicast;
285 }
286 if (dev->flags & IFF_PROMISC) {
287 err = dev_set_promiscuity(real_dev, 1);
288 if (err < 0)
289 goto clear_allmulti;
290 }
291
292 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700293
Patrick McHardy70c03b42008-07-05 21:26:57 -0700294 if (vlan->flags & VLAN_FLAG_GVRP)
295 vlan_gvrp_request_join(dev);
296
Phil Oester0ac820e2010-08-17 18:45:08 +0000297 if (netif_carrier_ok(real_dev))
298 netif_carrier_on(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 return 0;
Wang Chen89146502008-07-14 20:59:03 -0700300
301clear_allmulti:
302 if (dev->flags & IFF_ALLMULTI)
303 dev_set_allmulti(real_dev, -1);
304del_unicast:
305 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000306 dev_uc_del(real_dev, dev->dev_addr);
Wang Chen89146502008-07-14 20:59:03 -0700307out:
Jay Vosburghadc667e2009-04-25 18:03:35 -0700308 netif_carrier_off(dev);
Wang Chen89146502008-07-14 20:59:03 -0700309 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310}
311
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800312static int vlan_dev_stop(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313{
Patrick McHardy70c03b42008-07-05 21:26:57 -0700314 struct vlan_dev_info *vlan = vlan_dev_info(dev);
315 struct net_device *real_dev = vlan->real_dev;
316
Patrick McHardy56addd62007-07-14 18:53:28 -0700317 dev_mc_unsync(real_dev, dev);
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000318 dev_uc_unsync(real_dev, dev);
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700319 if (dev->flags & IFF_ALLMULTI)
320 dev_set_allmulti(real_dev, -1);
321 if (dev->flags & IFF_PROMISC)
322 dev_set_promiscuity(real_dev, -1);
323
Patrick McHardy8c979c22007-07-11 19:45:24 -0700324 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000325 dev_uc_del(real_dev, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700326
Jay Vosburghadc667e2009-04-25 18:03:35 -0700327 netif_carrier_off(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 return 0;
329}
330
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800331static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
Patrick McHardy39aaac12007-11-10 21:52:35 -0800332{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800333 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
Patrick McHardy39aaac12007-11-10 21:52:35 -0800334 struct sockaddr *addr = p;
335 int err;
336
337 if (!is_valid_ether_addr(addr->sa_data))
338 return -EADDRNOTAVAIL;
339
340 if (!(dev->flags & IFF_UP))
341 goto out;
342
343 if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) {
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000344 err = dev_uc_add(real_dev, addr->sa_data);
Patrick McHardy39aaac12007-11-10 21:52:35 -0800345 if (err < 0)
346 return err;
347 }
348
349 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000350 dev_uc_del(real_dev, dev->dev_addr);
Patrick McHardy39aaac12007-11-10 21:52:35 -0800351
352out:
353 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
354 return 0;
355}
356
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800357static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800359 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
Stephen Hemminger656299f2008-11-19 21:53:47 -0800360 const struct net_device_ops *ops = real_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 struct ifreq ifrr;
362 int err = -EOPNOTSUPP;
363
364 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
365 ifrr.ifr_ifru = ifr->ifr_ifru;
366
Patrick McHardy2029cc22008-01-21 00:26:41 -0800367 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 case SIOCGMIIPHY:
369 case SIOCGMIIREG:
370 case SIOCSMIIREG:
Stephen Hemminger656299f2008-11-19 21:53:47 -0800371 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
372 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 }
375
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900376 if (!err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 ifr->ifr_ifru = ifrr.ifr_ifru;
378
379 return err;
380}
381
Frank Blaschkacc883d12009-01-08 10:50:20 -0800382static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
383{
384 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
385 const struct net_device_ops *ops = real_dev->netdev_ops;
386 int err = 0;
387
388 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
David S. Miller9d40bbd2009-03-04 23:46:25 -0800389 err = ops->ndo_neigh_setup(real_dev, pa);
Frank Blaschkacc883d12009-01-08 10:50:20 -0800390
391 return err;
392}
393
Vasu Devb85daa52009-08-14 12:41:07 +0000394#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
395static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
396 struct scatterlist *sgl, unsigned int sgc)
397{
398 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
399 const struct net_device_ops *ops = real_dev->netdev_ops;
400 int rc = 0;
401
402 if (ops->ndo_fcoe_ddp_setup)
403 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
404
405 return rc;
406}
407
408static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
409{
410 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
411 const struct net_device_ops *ops = real_dev->netdev_ops;
412 int len = 0;
413
414 if (ops->ndo_fcoe_ddp_done)
415 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
416
417 return len;
418}
Yi Zou0af46d92009-08-31 12:31:55 +0000419
420static int vlan_dev_fcoe_enable(struct net_device *dev)
421{
422 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
423 const struct net_device_ops *ops = real_dev->netdev_ops;
424 int rc = -EINVAL;
425
426 if (ops->ndo_fcoe_enable)
427 rc = ops->ndo_fcoe_enable(real_dev);
428 return rc;
429}
430
431static int vlan_dev_fcoe_disable(struct net_device *dev)
432{
433 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
434 const struct net_device_ops *ops = real_dev->netdev_ops;
435 int rc = -EINVAL;
436
437 if (ops->ndo_fcoe_disable)
438 rc = ops->ndo_fcoe_disable(real_dev);
439 return rc;
440}
Yi Zoud6534792009-10-28 18:25:16 +0000441
442static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
443{
444 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
445 const struct net_device_ops *ops = real_dev->netdev_ops;
446 int rc = -EINVAL;
447
448 if (ops->ndo_fcoe_get_wwn)
449 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
450 return rc;
451}
Yi Zou4ea09c92011-02-01 07:22:11 +0000452
453static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
454 struct scatterlist *sgl, unsigned int sgc)
455{
456 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
457 const struct net_device_ops *ops = real_dev->netdev_ops;
458 int rc = 0;
459
460 if (ops->ndo_fcoe_ddp_target)
461 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
462
463 return rc;
464}
Vasu Devb85daa52009-08-14 12:41:07 +0000465#endif
466
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800467static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700468{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800469 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700470
471 if (change & IFF_ALLMULTI)
472 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
473 if (change & IFF_PROMISC)
474 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
475}
476
Chris Leeche83a2ea2008-01-31 16:53:23 -0800477static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800479 dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000480 dev_uc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481}
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800482
483/*
484 * vlan network devices have devices nesting below it, and are a special
485 * "super class" of normal network devices; split their locks off into a
486 * separate class since they always nest.
487 */
488static struct lock_class_key vlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700489static struct lock_class_key vlan_netdev_addr_lock_key;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800490
David S. Millere8a04642008-07-17 00:34:19 -0700491static void vlan_dev_set_lockdep_one(struct net_device *dev,
492 struct netdev_queue *txq,
493 void *_subclass)
David S. Millerc773e842008-07-08 23:13:53 -0700494{
495 lockdep_set_class_and_subclass(&txq->_xmit_lock,
David S. Millere8a04642008-07-17 00:34:19 -0700496 &vlan_netdev_xmit_lock_key,
497 *(int *)_subclass);
David S. Millerc773e842008-07-08 23:13:53 -0700498}
499
500static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
501{
David S. Millercf508b12008-07-22 14:16:42 -0700502 lockdep_set_class_and_subclass(&dev->addr_list_lock,
503 &vlan_netdev_addr_lock_key,
504 subclass);
David S. Millere8a04642008-07-17 00:34:19 -0700505 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
David S. Millerc773e842008-07-08 23:13:53 -0700506}
507
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800508static const struct header_ops vlan_header_ops = {
509 .create = vlan_dev_hard_header,
510 .rebuild = vlan_dev_rebuild_header,
511 .parse = eth_header_parse,
512};
513
Eric Dumazet213b15c2010-11-11 09:42:45 +0000514static const struct net_device_ops vlan_netdev_ops;
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800515
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800516static int vlan_dev_init(struct net_device *dev)
517{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800518 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800519 int subclass = 0;
520
Jay Vosburghadc667e2009-04-25 18:03:35 -0700521 netif_carrier_off(dev);
522
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800523 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
John Fastabend194dbcc2010-05-12 21:31:06 +0000524 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
525 IFF_MASTER | IFF_SLAVE);
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800526 dev->iflink = real_dev->ifindex;
527 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
528 (1<<__LINK_STATE_DORMANT))) |
529 (1<<__LINK_STATE_PRESENT);
530
Michał Mirosławf0a619c2011-05-06 07:56:29 +0000531 dev->hw_features = NETIF_F_ALL_TX_OFFLOADS;
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700532 dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
Alexander Duyck1ae4be22008-09-11 20:17:05 -0700533 dev->gso_max_size = real_dev->gso_max_size;
Patrick McHardy5fb13572008-05-20 14:54:50 -0700534
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800535 /* ipv6 shared card related stuff */
536 dev->dev_id = real_dev->dev_id;
537
538 if (is_zero_ether_addr(dev->dev_addr))
539 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
540 if (is_zero_ether_addr(dev->broadcast))
541 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
542
Vasu Devb85daa52009-08-14 12:41:07 +0000543#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
544 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
545#endif
546
Eric Dumazetd870bfb2011-03-18 00:27:27 +0000547 dev->needed_headroom = real_dev->needed_headroom;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800548 if (real_dev->features & NETIF_F_HW_VLAN_TX) {
549 dev->header_ops = real_dev->header_ops;
550 dev->hard_header_len = real_dev->hard_header_len;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800551 } else {
552 dev->header_ops = &vlan_header_ops;
553 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800554 }
555
Eric Dumazet213b15c2010-11-11 09:42:45 +0000556 dev->netdev_ops = &vlan_netdev_ops;
John Fastabend636e19a2010-10-30 14:22:42 +0000557
Joonwoo Park26a25232008-07-08 03:22:16 -0700558 if (is_vlan_dev(real_dev))
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800559 subclass = 1;
560
David S. Millerc773e842008-07-08 23:13:53 -0700561 vlan_dev_set_lockdep_class(dev, subclass);
Eric Dumazet97932412009-11-17 04:53:09 +0000562
Eric Dumazet4af429d2010-11-10 23:42:00 +0000563 vlan_dev_info(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
564 if (!vlan_dev_info(dev)->vlan_pcpu_stats)
Eric Dumazet97932412009-11-17 04:53:09 +0000565 return -ENOMEM;
566
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800567 return 0;
568}
569
Pavel Emelyanov23556322008-04-04 12:45:12 -0700570static void vlan_dev_uninit(struct net_device *dev)
571{
572 struct vlan_priority_tci_mapping *pm;
573 struct vlan_dev_info *vlan = vlan_dev_info(dev);
574 int i;
575
Eric Dumazet4af429d2010-11-10 23:42:00 +0000576 free_percpu(vlan->vlan_pcpu_stats);
577 vlan->vlan_pcpu_stats = NULL;
Pavel Emelyanov23556322008-04-04 12:45:12 -0700578 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
579 while ((pm = vlan->egress_priority_map[i]) != NULL) {
580 vlan->egress_priority_map[i] = pm->next;
581 kfree(pm);
582 }
583 }
584}
585
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700586static u32 vlan_dev_fix_features(struct net_device *dev, u32 features)
587{
588 struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
589
Michał Mirosławf0a619c2011-05-06 07:56:29 +0000590 features &= real_dev->features;
591 features &= real_dev->vlan_features;
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700592 if (dev_ethtool_get_rx_csum(real_dev))
593 features |= NETIF_F_RXCSUM;
Michał Mirosławf0a619c2011-05-06 07:56:29 +0000594 features |= NETIF_F_LLTX;
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700595
596 return features;
597}
598
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700599static int vlan_ethtool_get_settings(struct net_device *dev,
600 struct ethtool_cmd *cmd)
601{
602 const struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardyb1b67dd2009-04-20 04:49:28 +0000603 return dev_ethtool_get_settings(vlan->real_dev, cmd);
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700604}
605
606static void vlan_ethtool_get_drvinfo(struct net_device *dev,
607 struct ethtool_drvinfo *info)
608{
609 strcpy(info->driver, vlan_fullname);
610 strcpy(info->version, vlan_version);
611 strcpy(info->fw_version, "N/A");
612}
613
Eric Dumazet28172732010-07-07 14:58:56 -0700614static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
Eric Dumazet97932412009-11-17 04:53:09 +0000615{
Eric Dumazet97932412009-11-17 04:53:09 +0000616
Eric Dumazet4af429d2010-11-10 23:42:00 +0000617 if (vlan_dev_info(dev)->vlan_pcpu_stats) {
618 struct vlan_pcpu_stats *p;
619 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazet97932412009-11-17 04:53:09 +0000620 int i;
621
622 for_each_possible_cpu(i) {
Eric Dumazet4af429d2010-11-10 23:42:00 +0000623 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000624 unsigned int start;
625
Eric Dumazet4af429d2010-11-10 23:42:00 +0000626 p = per_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats, i);
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000627 do {
628 start = u64_stats_fetch_begin_bh(&p->syncp);
629 rxpackets = p->rx_packets;
630 rxbytes = p->rx_bytes;
631 rxmulticast = p->rx_multicast;
Eric Dumazet4af429d2010-11-10 23:42:00 +0000632 txpackets = p->tx_packets;
633 txbytes = p->tx_bytes;
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000634 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
Eric Dumazet4af429d2010-11-10 23:42:00 +0000635
636 stats->rx_packets += rxpackets;
637 stats->rx_bytes += rxbytes;
638 stats->multicast += rxmulticast;
639 stats->tx_packets += txpackets;
640 stats->tx_bytes += txbytes;
641 /* rx_errors & tx_dropped are u32 */
642 rx_errors += p->rx_errors;
643 tx_dropped += p->tx_dropped;
Eric Dumazet97932412009-11-17 04:53:09 +0000644 }
Eric Dumazet4af429d2010-11-10 23:42:00 +0000645 stats->rx_errors = rx_errors;
646 stats->tx_dropped = tx_dropped;
Eric Dumazet97932412009-11-17 04:53:09 +0000647 }
648 return stats;
649}
650
Patrick McHardy75b88462008-07-08 03:22:42 -0700651static const struct ethtool_ops vlan_ethtool_ops = {
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700652 .get_settings = vlan_ethtool_get_settings,
653 .get_drvinfo = vlan_ethtool_get_drvinfo,
Patrick McHardy75b88462008-07-08 03:22:42 -0700654 .get_link = ethtool_op_get_link,
Patrick McHardy75b88462008-07-08 03:22:42 -0700655};
656
Stephen Hemminger656299f2008-11-19 21:53:47 -0800657static const struct net_device_ops vlan_netdev_ops = {
658 .ndo_change_mtu = vlan_dev_change_mtu,
659 .ndo_init = vlan_dev_init,
660 .ndo_uninit = vlan_dev_uninit,
661 .ndo_open = vlan_dev_open,
662 .ndo_stop = vlan_dev_stop,
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800663 .ndo_start_xmit = vlan_dev_hard_start_xmit,
664 .ndo_validate_addr = eth_validate_addr,
665 .ndo_set_mac_address = vlan_dev_set_mac_address,
666 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
667 .ndo_set_multicast_list = vlan_dev_set_rx_mode,
668 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
669 .ndo_do_ioctl = vlan_dev_ioctl,
Frank Blaschkacc883d12009-01-08 10:50:20 -0800670 .ndo_neigh_setup = vlan_dev_neigh_setup,
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000671 .ndo_get_stats64 = vlan_dev_get_stats64,
Vasu Devb85daa52009-08-14 12:41:07 +0000672#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
673 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
674 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
Yi Zou0af46d92009-08-31 12:31:55 +0000675 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
676 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
Yi Zoud6534792009-10-28 18:25:16 +0000677 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
Yi Zou4ea09c92011-02-01 07:22:11 +0000678 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
Vasu Devb85daa52009-08-14 12:41:07 +0000679#endif
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700680 .ndo_fix_features = vlan_dev_fix_features,
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800681};
682
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800683void vlan_setup(struct net_device *dev)
684{
685 ether_setup(dev);
686
687 dev->priv_flags |= IFF_802_1Q_VLAN;
Eric Dumazet93f154b2009-05-18 22:19:19 -0700688 dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800689 dev->tx_queue_len = 0;
690
Stephen Hemminger656299f2008-11-19 21:53:47 -0800691 dev->netdev_ops = &vlan_netdev_ops;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800692 dev->destructor = free_netdev;
Patrick McHardy75b88462008-07-08 03:22:42 -0700693 dev->ethtool_ops = &vlan_ethtool_ops;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800694
695 memset(dev->broadcast, 0, ETH_ALEN);
696}