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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
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>
Richard Cochran37dd9252014-11-21 14:16:20 +010029#include <linux/net_tstamp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/etherdevice.h>
Patrick McHardy75b88462008-07-08 03:22:42 -070031#include <linux/ethtool.h>
Hangbin Liu2463af62018-03-30 09:44:00 +080032#include <linux/phy.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <net/arp.h>
Ido Schimmel9d547832015-12-15 16:03:34 +010034#include <net/switchdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36#include "vlan.h"
37#include "vlanproc.h"
38#include <linux/if_vlan.h>
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +000039#include <linux/netpoll.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090042 * Create the VLAN header for an arbitrary protocol layer
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 *
44 * saddr=NULL means use device source address
45 * daddr=NULL means leave destination address (eg unresolved arp)
46 *
47 * This is called when the SKB is moving down the stack towards the
48 * physical devices.
49 */
Patrick McHardyef3eb3e2008-01-21 00:22:11 -080050static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
51 unsigned short type,
52 const void *daddr, const void *saddr,
53 unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070054{
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +000055 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 struct vlan_hdr *vhdr;
Patrick McHardy1349fe92008-07-14 22:51:19 -070057 unsigned int vhdrlen = 0;
Patrick McHardy9bb85822008-07-08 03:24:44 -070058 u16 vlan_tci = 0;
Patrick McHardy1349fe92008-07-14 22:51:19 -070059 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Wang Sheng-Hui0c0667a2013-08-03 16:54:50 +080061 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
63
Wang Sheng-Hui0c0667a2013-08-03 16:54:50 +080064 vlan_tci = vlan->vlan_id;
David S. Millere267cb92013-11-11 00:42:07 -050065 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
Patrick McHardy9bb85822008-07-08 03:24:44 -070066 vhdr->h_vlan_TCI = htons(vlan_tci);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68 /*
Octavian Purdilabf9ae532009-12-26 11:50:59 +000069 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
70 * put the length in here instead.
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 */
Octavian Purdilabf9ae532009-12-26 11:50:59 +000072 if (type != ETH_P_802_3 && type != ETH_P_802_2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 vhdr->h_vlan_encapsulated_proto = htons(type);
Patrick McHardy2029cc22008-01-21 00:26:41 -080074 else
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 vhdr->h_vlan_encapsulated_proto = htons(len);
Jerome Borsboom279e1722007-04-13 16:12:47 -070076
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +000077 skb->protocol = vlan->vlan_proto;
78 type = ntohs(vlan->vlan_proto);
Patrick McHardy1349fe92008-07-14 22:51:19 -070079 vhdrlen = VLAN_HLEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 }
81
82 /* Before delegating work to the lower layer, enter our MAC-address */
83 if (saddr == NULL)
84 saddr = dev->dev_addr;
85
Patrick McHardy1349fe92008-07-14 22:51:19 -070086 /* Now make the underlying real hard header */
Wang Sheng-Hui0c0667a2013-08-03 16:54:50 +080087 dev = vlan->real_dev;
Patrick McHardy1349fe92008-07-14 22:51:19 -070088 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
89 if (rc > 0)
90 rc += vhdrlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 return rc;
92}
93
Amerigo Wang6eacf8a2012-08-10 01:24:48 +000094static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
95{
96#ifdef CONFIG_NET_POLL_CONTROLLER
97 if (vlan->netpoll)
98 netpoll_send_skb(vlan->netpoll, skb);
99#else
100 BUG();
101#endif
102 return NETDEV_TX_OK;
103}
104
Stephen Hemminger6fef4c02009-08-31 19:50:41 +0000105static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
106 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107{
Amerigo Wang6eacf8a2012-08-10 01:24:48 +0000108 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
Eric Dumazet1a123a32009-09-03 00:39:16 +0000110 unsigned int len;
111 int ret;
David S. Miller55b01e82008-02-23 20:09:11 -0800112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
114 *
115 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
116 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
117 */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000118 if (veth->h_vlan_proto != vlan->vlan_proto ||
Amerigo Wang6eacf8a2012-08-10 01:24:48 +0000119 vlan->flags & VLAN_FLAG_REORDER_HDR) {
Patrick McHardy9bb85822008-07-08 03:24:44 -0700120 u16 vlan_tci;
Amerigo Wang6eacf8a2012-08-10 01:24:48 +0000121 vlan_tci = vlan->vlan_id;
David S. Millere267cb92013-11-11 00:42:07 -0500122 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
Jiri Pirkob960a0ac2014-11-19 14:04:56 +0100123 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 }
125
Amerigo Wang6eacf8a2012-08-10 01:24:48 +0000126 skb->dev = vlan->real_dev;
Eric Dumazet1a123a32009-09-03 00:39:16 +0000127 len = skb->len;
Amerigo Wang6eacf8a2012-08-10 01:24:48 +0000128 if (unlikely(netpoll_tx_running(dev)))
129 return vlan_netpoll_send_skb(vlan, skb);
130
Eric Dumazet1a123a32009-09-03 00:39:16 +0000131 ret = dev_queue_xmit(skb);
132
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000133 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Eric Dumazet4af429d2010-11-10 23:42:00 +0000134 struct vlan_pcpu_stats *stats;
135
Amerigo Wang6eacf8a2012-08-10 01:24:48 +0000136 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
Eric Dumazet4af429d2010-11-10 23:42:00 +0000137 u64_stats_update_begin(&stats->syncp);
138 stats->tx_packets++;
139 stats->tx_bytes += len;
Wei Yongjun307f73d2011-05-31 22:53:19 +0000140 u64_stats_update_end(&stats->syncp);
Eric Dumazet4af429d2010-11-10 23:42:00 +0000141 } else {
Amerigo Wang6eacf8a2012-08-10 01:24:48 +0000142 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
Eric Dumazet4af429d2010-11-10 23:42:00 +0000143 }
Eric Dumazet1a123a32009-09-03 00:39:16 +0000144
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000145 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146}
147
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800148static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
Paolo Abeni18d3df32016-07-14 18:00:10 +0200150 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
151 unsigned int max_mtu = real_dev->mtu;
152
153 if (netif_reduces_vlan_mtu(real_dev))
154 max_mtu -= VLAN_HLEN;
155 if (max_mtu < new_mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 return -ERANGE;
157
158 dev->mtu = new_mtu;
159
160 return 0;
161}
162
Patrick McHardyc17d8872007-06-13 12:05:22 -0700163void vlan_dev_set_ingress_priority(const struct net_device *dev,
Patrick McHardy9bb85822008-07-08 03:24:44 -0700164 u32 skb_prio, u16 vlan_prio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000166 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardyb020cb42007-06-13 12:07:22 -0700167
168 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
169 vlan->nr_ingress_mappings--;
170 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
171 vlan->nr_ingress_mappings++;
172
173 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
Patrick McHardyc17d8872007-06-13 12:05:22 -0700176int vlan_dev_set_egress_priority(const struct net_device *dev,
Patrick McHardy9bb85822008-07-08 03:24:44 -0700177 u32 skb_prio, u16 vlan_prio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000179 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 struct vlan_priority_tci_mapping *mp = NULL;
181 struct vlan_priority_tci_mapping *np;
Eric Dumazet05423b22009-10-26 18:40:35 -0700182 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900183
Patrick McHardyc17d8872007-06-13 12:05:22 -0700184 /* See if a priority mapping exists.. */
Patrick McHardyb020cb42007-06-13 12:07:22 -0700185 mp = vlan->egress_priority_map[skb_prio & 0xF];
Patrick McHardyc17d8872007-06-13 12:05:22 -0700186 while (mp) {
187 if (mp->priority == skb_prio) {
Patrick McHardyb020cb42007-06-13 12:07:22 -0700188 if (mp->vlan_qos && !vlan_qos)
189 vlan->nr_egress_mappings--;
190 else if (!mp->vlan_qos && vlan_qos)
191 vlan->nr_egress_mappings++;
192 mp->vlan_qos = vlan_qos;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700193 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 }
Patrick McHardyc17d8872007-06-13 12:05:22 -0700195 mp = mp->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 }
Patrick McHardyc17d8872007-06-13 12:05:22 -0700197
198 /* Create a new mapping then. */
Patrick McHardyb020cb42007-06-13 12:07:22 -0700199 mp = vlan->egress_priority_map[skb_prio & 0xF];
Patrick McHardyc17d8872007-06-13 12:05:22 -0700200 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
201 if (!np)
202 return -ENOBUFS;
203
204 np->next = mp;
205 np->priority = skb_prio;
Patrick McHardyb020cb42007-06-13 12:07:22 -0700206 np->vlan_qos = vlan_qos;
Eric Dumazet3e3aac42013-07-18 09:35:10 -0700207 /* Before inserting this element in hash table, make sure all its fields
208 * are committed to memory.
David S. Millere267cb92013-11-11 00:42:07 -0500209 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
Eric Dumazet3e3aac42013-07-18 09:35:10 -0700210 */
211 smp_wmb();
Patrick McHardyb020cb42007-06-13 12:07:22 -0700212 vlan->egress_priority_map[skb_prio & 0xF] = np;
213 if (vlan_qos)
214 vlan->nr_egress_mappings++;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700215 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
Patrick McHardya4bf3af42007-06-13 12:07:37 -0700218/* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700219int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000221 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700222 u32 old_flags = vlan->flags;
223
Patrick McHardy5e756592009-11-25 07:54:54 +0000224 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
David Ward86fbe9b2013-02-08 17:17:07 +0000225 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700226 return -EINVAL;
227
228 vlan->flags = (old_flags & ~mask) | (flags & mask);
Patrick McHardy70c03b42008-07-05 21:26:57 -0700229
230 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
231 if (vlan->flags & VLAN_FLAG_GVRP)
232 vlan_gvrp_request_join(dev);
233 else
234 vlan_gvrp_request_leave(dev);
235 }
David Ward86fbe9b2013-02-08 17:17:07 +0000236
237 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
238 if (vlan->flags & VLAN_FLAG_MVRP)
239 vlan_mvrp_request_join(dev);
240 else
241 vlan_mvrp_request_leave(dev);
242 }
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700243 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244}
245
Patrick McHardyc17d8872007-06-13 12:05:22 -0700246void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000248 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249}
250
Mike Manning308453a2016-05-27 17:45:07 +0100251bool vlan_dev_inherit_address(struct net_device *dev,
252 struct net_device *real_dev)
253{
254 if (dev->addr_assign_type != NET_ADDR_STOLEN)
255 return false;
256
257 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
258 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
259 return true;
260}
261
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800262static int vlan_dev_open(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000264 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700265 struct net_device *real_dev = vlan->real_dev;
266 int err;
267
Patrick McHardy5e756592009-11-25 07:54:54 +0000268 if (!(real_dev->flags & IFF_UP) &&
269 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 return -ENETDOWN;
271
Mike Manning308453a2016-05-27 17:45:07 +0100272 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) &&
273 !vlan_dev_inherit_address(dev, real_dev)) {
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000274 err = dev_uc_add(real_dev, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700275 if (err < 0)
Wang Chen89146502008-07-14 20:59:03 -0700276 goto out;
Patrick McHardy8c979c22007-07-11 19:45:24 -0700277 }
Patrick McHardy8c979c22007-07-11 19:45:24 -0700278
Wang Chen89146502008-07-14 20:59:03 -0700279 if (dev->flags & IFF_ALLMULTI) {
280 err = dev_set_allmulti(real_dev, 1);
281 if (err < 0)
282 goto del_unicast;
283 }
284 if (dev->flags & IFF_PROMISC) {
285 err = dev_set_promiscuity(real_dev, 1);
286 if (err < 0)
287 goto clear_allmulti;
288 }
289
Joe Perches07fc67b2014-01-20 09:52:14 -0800290 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700291
Patrick McHardy70c03b42008-07-05 21:26:57 -0700292 if (vlan->flags & VLAN_FLAG_GVRP)
293 vlan_gvrp_request_join(dev);
294
David Ward86fbe9b2013-02-08 17:17:07 +0000295 if (vlan->flags & VLAN_FLAG_MVRP)
296 vlan_mvrp_request_join(dev);
297
Phil Oester0ac820e2010-08-17 18:45:08 +0000298 if (netif_carrier_ok(real_dev))
299 netif_carrier_on(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 return 0;
Wang Chen89146502008-07-14 20:59:03 -0700301
302clear_allmulti:
303 if (dev->flags & IFF_ALLMULTI)
304 dev_set_allmulti(real_dev, -1);
305del_unicast:
Joe Perches53a2b3a2012-05-08 18:56:47 +0000306 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000307 dev_uc_del(real_dev, dev->dev_addr);
Wang Chen89146502008-07-14 20:59:03 -0700308out:
Jay Vosburghadc667e2009-04-25 18:03:35 -0700309 netif_carrier_off(dev);
Wang Chen89146502008-07-14 20:59:03 -0700310 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311}
312
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800313static int vlan_dev_stop(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000315 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardy70c03b42008-07-05 21:26:57 -0700316 struct net_device *real_dev = vlan->real_dev;
317
Patrick McHardy56addd62007-07-14 18:53:28 -0700318 dev_mc_unsync(real_dev, dev);
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000319 dev_uc_unsync(real_dev, dev);
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700320 if (dev->flags & IFF_ALLMULTI)
321 dev_set_allmulti(real_dev, -1);
322 if (dev->flags & IFF_PROMISC)
323 dev_set_promiscuity(real_dev, -1);
324
Joe Perches53a2b3a2012-05-08 18:56:47 +0000325 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000326 dev_uc_del(real_dev, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700327
Jay Vosburghadc667e2009-04-25 18:03:35 -0700328 netif_carrier_off(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 return 0;
330}
331
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800332static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
Patrick McHardy39aaac12007-11-10 21:52:35 -0800333{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000334 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Patrick McHardy39aaac12007-11-10 21:52:35 -0800335 struct sockaddr *addr = p;
336 int err;
337
338 if (!is_valid_ether_addr(addr->sa_data))
339 return -EADDRNOTAVAIL;
340
341 if (!(dev->flags & IFF_UP))
342 goto out;
343
Joe Perches53a2b3a2012-05-08 18:56:47 +0000344 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000345 err = dev_uc_add(real_dev, addr->sa_data);
Patrick McHardy39aaac12007-11-10 21:52:35 -0800346 if (err < 0)
347 return err;
348 }
349
Joe Perches53a2b3a2012-05-08 18:56:47 +0000350 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000351 dev_uc_del(real_dev, dev->dev_addr);
Patrick McHardy39aaac12007-11-10 21:52:35 -0800352
353out:
Joe Perches07fc67b2014-01-20 09:52:14 -0800354 ether_addr_copy(dev->dev_addr, addr->sa_data);
Patrick McHardy39aaac12007-11-10 21:52:35 -0800355 return 0;
356}
357
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800358static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000360 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Stephen Hemminger656299f2008-11-19 21:53:47 -0800361 const struct net_device_ops *ops = real_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 struct ifreq ifrr;
363 int err = -EOPNOTSUPP;
364
365 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
366 ifrr.ifr_ifru = ifr->ifr_ifru;
367
Patrick McHardy2029cc22008-01-21 00:26:41 -0800368 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 case SIOCGMIIPHY:
370 case SIOCGMIIREG:
371 case SIOCSMIIREG:
Stefan Sørensena6111d32014-06-27 11:59:11 +0200372 case SIOCSHWTSTAMP:
373 case SIOCGHWTSTAMP:
Stephen Hemminger656299f2008-11-19 21:53:47 -0800374 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
375 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 }
378
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900379 if (!err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 ifr->ifr_ifru = ifrr.ifr_ifru;
381
382 return err;
383}
384
Frank Blaschkacc883d12009-01-08 10:50:20 -0800385static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
386{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000387 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Frank Blaschkacc883d12009-01-08 10:50:20 -0800388 const struct net_device_ops *ops = real_dev->netdev_ops;
389 int err = 0;
390
391 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
David S. Miller9d40bbd2009-03-04 23:46:25 -0800392 err = ops->ndo_neigh_setup(real_dev, pa);
Frank Blaschkacc883d12009-01-08 10:50:20 -0800393
394 return err;
395}
396
Amerigo Wangf4d53922012-10-29 17:22:28 +0000397#if IS_ENABLED(CONFIG_FCOE)
Vasu Devb85daa52009-08-14 12:41:07 +0000398static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
399 struct scatterlist *sgl, unsigned int sgc)
400{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000401 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Vasu Devb85daa52009-08-14 12:41:07 +0000402 const struct net_device_ops *ops = real_dev->netdev_ops;
403 int rc = 0;
404
405 if (ops->ndo_fcoe_ddp_setup)
406 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
407
408 return rc;
409}
410
411static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
412{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000413 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Vasu Devb85daa52009-08-14 12:41:07 +0000414 const struct net_device_ops *ops = real_dev->netdev_ops;
415 int len = 0;
416
417 if (ops->ndo_fcoe_ddp_done)
418 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
419
420 return len;
421}
Yi Zou0af46d92009-08-31 12:31:55 +0000422
423static int vlan_dev_fcoe_enable(struct net_device *dev)
424{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000425 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Yi Zou0af46d92009-08-31 12:31:55 +0000426 const struct net_device_ops *ops = real_dev->netdev_ops;
427 int rc = -EINVAL;
428
429 if (ops->ndo_fcoe_enable)
430 rc = ops->ndo_fcoe_enable(real_dev);
431 return rc;
432}
433
434static int vlan_dev_fcoe_disable(struct net_device *dev)
435{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000436 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Yi Zou0af46d92009-08-31 12:31:55 +0000437 const struct net_device_ops *ops = real_dev->netdev_ops;
438 int rc = -EINVAL;
439
440 if (ops->ndo_fcoe_disable)
441 rc = ops->ndo_fcoe_disable(real_dev);
442 return rc;
443}
Yi Zoud6534792009-10-28 18:25:16 +0000444
445static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
446{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000447 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Yi Zoud6534792009-10-28 18:25:16 +0000448 const struct net_device_ops *ops = real_dev->netdev_ops;
449 int rc = -EINVAL;
450
451 if (ops->ndo_fcoe_get_wwn)
452 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
453 return rc;
454}
Yi Zou4ea09c92011-02-01 07:22:11 +0000455
456static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
457 struct scatterlist *sgl, unsigned int sgc)
458{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000459 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Yi Zou4ea09c92011-02-01 07:22:11 +0000460 const struct net_device_ops *ops = real_dev->netdev_ops;
461 int rc = 0;
462
463 if (ops->ndo_fcoe_ddp_target)
464 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
465
466 return rc;
467}
Vasu Devb85daa52009-08-14 12:41:07 +0000468#endif
469
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800470static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700471{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000472 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700473
Matthijs Kooijmandeede2f2011-10-31 04:53:13 +0000474 if (dev->flags & IFF_UP) {
475 if (change & IFF_ALLMULTI)
476 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
477 if (change & IFF_PROMISC)
478 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
479 }
Patrick McHardy6c78dcb2007-07-14 18:52:56 -0700480}
481
Chris Leeche83a2ea2008-01-31 16:53:23 -0800482static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483{
Vlad Yasevichd38569a2014-05-16 17:04:55 -0400484 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
485 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486}
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800487
488/*
489 * vlan network devices have devices nesting below it, and are a special
490 * "super class" of normal network devices; split their locks off into a
491 * separate class since they always nest.
492 */
493static struct lock_class_key vlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700494static struct lock_class_key vlan_netdev_addr_lock_key;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800495
David S. Millere8a04642008-07-17 00:34:19 -0700496static void vlan_dev_set_lockdep_one(struct net_device *dev,
497 struct netdev_queue *txq,
498 void *_subclass)
David S. Millerc773e842008-07-08 23:13:53 -0700499{
500 lockdep_set_class_and_subclass(&txq->_xmit_lock,
David S. Millere8a04642008-07-17 00:34:19 -0700501 &vlan_netdev_xmit_lock_key,
502 *(int *)_subclass);
David S. Millerc773e842008-07-08 23:13:53 -0700503}
504
505static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
506{
David S. Millercf508b12008-07-22 14:16:42 -0700507 lockdep_set_class_and_subclass(&dev->addr_list_lock,
508 &vlan_netdev_addr_lock_key,
509 subclass);
David S. Millere8a04642008-07-17 00:34:19 -0700510 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
David S. Millerc773e842008-07-08 23:13:53 -0700511}
512
Vlad Yasevichd38569a2014-05-16 17:04:55 -0400513static int vlan_dev_get_lock_subclass(struct net_device *dev)
514{
515 return vlan_dev_priv(dev)->nest_level;
516}
517
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800518static const struct header_ops vlan_header_ops = {
519 .create = vlan_dev_hard_header,
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800520 .parse = eth_header_parse,
521};
522
David S. Miller22053692013-12-31 16:23:35 -0500523static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
524 unsigned short type,
525 const void *daddr, const void *saddr,
526 unsigned int len)
527{
528 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
529 struct net_device *real_dev = vlan->real_dev;
530
Peter Boströmdd387432014-03-10 16:17:15 +0100531 if (saddr == NULL)
532 saddr = dev->dev_addr;
533
David S. Miller22053692013-12-31 16:23:35 -0500534 return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
535}
536
537static const struct header_ops vlan_passthru_header_ops = {
538 .create = vlan_passthru_hard_header,
David S. Miller22053692013-12-31 16:23:35 -0500539 .parse = eth_header_parse,
540};
541
Doug Goldsteine949b092012-10-21 19:53:57 +0000542static struct device_type vlan_type = {
543 .name = "vlan",
544};
545
Eric Dumazet213b15c2010-11-11 09:42:45 +0000546static const struct net_device_ops vlan_netdev_ops;
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800547
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800548static int vlan_dev_init(struct net_device *dev)
549{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000550 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800551
Jay Vosburghadc667e2009-04-25 18:03:35 -0700552 netif_carrier_off(dev);
553
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800554 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
John Fastabend194dbcc2010-05-12 21:31:06 +0000555 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
556 IFF_MASTER | IFF_SLAVE);
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800557 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
558 (1<<__LINK_STATE_DORMANT))) |
559 (1<<__LINK_STATE_PRESENT);
560
Tom Herberta1882222015-12-14 11:19:43 -0800561 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
Toshiaki Makita53f6b702014-12-10 11:43:13 +0900562 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
Tom Herbert53692b12015-12-14 11:19:41 -0800563 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
Michał Mirosław62f2a3a2011-07-13 14:10:29 +0000564 NETIF_F_ALL_FCOE;
565
Andrey Vagin4c484f72017-03-15 17:41:14 -0700566 dev->features |= dev->hw_features | NETIF_F_LLTX;
Alexander Duyck1ae4be22008-09-11 20:17:05 -0700567 dev->gso_max_size = real_dev->gso_max_size;
Eric Dumazetf6773c52016-03-16 21:59:49 -0700568 dev->gso_max_segs = real_dev->gso_max_segs;
Vlad Yasevich2adb9562014-03-27 22:14:49 -0400569 if (dev->features & NETIF_F_VLAN_FEATURES)
570 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
571
Toshiaki Makita8d463502015-03-27 14:31:10 +0900572 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
Patrick McHardy5fb13572008-05-20 14:54:50 -0700573
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800574 /* ipv6 shared card related stuff */
575 dev->dev_id = real_dev->dev_id;
576
Mike Manning308453a2016-05-27 17:45:07 +0100577 if (is_zero_ether_addr(dev->dev_addr)) {
578 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
579 dev->addr_assign_type = NET_ADDR_STOLEN;
580 }
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800581 if (is_zero_ether_addr(dev->broadcast))
582 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
583
Amerigo Wangf4d53922012-10-29 17:22:28 +0000584#if IS_ENABLED(CONFIG_FCOE)
Vasu Devb85daa52009-08-14 12:41:07 +0000585 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
586#endif
587
Eric Dumazetd870bfb2011-03-18 00:27:27 +0000588 dev->needed_headroom = real_dev->needed_headroom;
Vlad Yasevichfc0d48b2014-03-26 11:47:56 -0400589 if (vlan_hw_offload_capable(real_dev->features,
590 vlan_dev_priv(dev)->vlan_proto)) {
David S. Miller22053692013-12-31 16:23:35 -0500591 dev->header_ops = &vlan_passthru_header_ops;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800592 dev->hard_header_len = real_dev->hard_header_len;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800593 } else {
594 dev->header_ops = &vlan_header_ops;
595 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800596 }
597
Eric Dumazet213b15c2010-11-11 09:42:45 +0000598 dev->netdev_ops = &vlan_netdev_ops;
John Fastabend636e19a2010-10-30 14:22:42 +0000599
Doug Goldsteine949b092012-10-21 19:53:57 +0000600 SET_NETDEV_DEVTYPE(dev, &vlan_type);
601
Vlad Yasevichd38569a2014-05-16 17:04:55 -0400602 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev));
Eric Dumazet97932412009-11-17 04:53:09 +0000603
WANG Cong1c213bd2014-02-13 11:46:28 -0800604 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
Jiri Pirko7da82c02011-12-08 04:11:15 +0000605 if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
Eric Dumazet97932412009-11-17 04:53:09 +0000606 return -ENOMEM;
607
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800608 return 0;
609}
610
Pavel Emelyanov23556322008-04-04 12:45:12 -0700611static void vlan_dev_uninit(struct net_device *dev)
612{
613 struct vlan_priority_tci_mapping *pm;
Jiri Pirko7da82c02011-12-08 04:11:15 +0000614 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Pavel Emelyanov23556322008-04-04 12:45:12 -0700615 int i;
616
617 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
618 while ((pm = vlan->egress_priority_map[i]) != NULL) {
619 vlan->egress_priority_map[i] = pm->next;
620 kfree(pm);
621 }
622 }
623}
624
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000625static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
626 netdev_features_t features)
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700627{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000628 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
Bjørn Morkb29d3142013-05-01 23:06:42 +0000629 netdev_features_t old_features = features;
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700630
Michal Kubečekda081432014-05-20 08:29:25 +0200631 features = netdev_intersect_features(features, real_dev->vlan_features);
Michał Mirosławbc5787c62011-11-15 15:29:55 +0000632 features |= NETIF_F_RXCSUM;
Michal Kubečekda081432014-05-20 08:29:25 +0200633 features = netdev_intersect_features(features, real_dev->features);
Shan Wei712ae512011-07-05 20:43:12 -0700634
Toshiaki Makita53f6b702014-12-10 11:43:13 +0900635 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
Michał Mirosławf0a619c2011-05-06 07:56:29 +0000636 features |= NETIF_F_LLTX;
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700637
638 return features;
639}
640
David Decotigny57709792016-02-24 10:58:08 -0800641static int vlan_ethtool_get_link_ksettings(struct net_device *dev,
642 struct ethtool_link_ksettings *cmd)
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700643{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000644 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000645
David Decotigny57709792016-02-24 10:58:08 -0800646 return __ethtool_get_link_ksettings(vlan->real_dev, cmd);
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700647}
648
649static void vlan_ethtool_get_drvinfo(struct net_device *dev,
650 struct ethtool_drvinfo *info)
651{
Jiri Pirko7826d432013-01-06 00:44:26 +0000652 strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
653 strlcpy(info->version, vlan_version, sizeof(info->version));
654 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700655}
656
Richard Cochran37dd9252014-11-21 14:16:20 +0100657static int vlan_ethtool_get_ts_info(struct net_device *dev,
658 struct ethtool_ts_info *info)
659{
660 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
661 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
Hangbin Liu2463af62018-03-30 09:44:00 +0800662 struct phy_device *phydev = vlan->real_dev->phydev;
Richard Cochran37dd9252014-11-21 14:16:20 +0100663
Hangbin Liu2463af62018-03-30 09:44:00 +0800664 if (phydev && phydev->drv && phydev->drv->ts_info) {
665 return phydev->drv->ts_info(phydev, info);
666 } else if (ops->get_ts_info) {
Richard Cochran37dd9252014-11-21 14:16:20 +0100667 return ops->get_ts_info(vlan->real_dev, info);
668 } else {
669 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
670 SOF_TIMESTAMPING_SOFTWARE;
671 info->phc_index = -1;
672 }
673
674 return 0;
675}
676
Eric Dumazet28172732010-07-07 14:58:56 -0700677static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
Eric Dumazet97932412009-11-17 04:53:09 +0000678{
Li RongQing5a4ae5f2014-04-21 19:49:08 +0800679 struct vlan_pcpu_stats *p;
680 u32 rx_errors = 0, tx_dropped = 0;
681 int i;
Eric Dumazet97932412009-11-17 04:53:09 +0000682
Li RongQing5a4ae5f2014-04-21 19:49:08 +0800683 for_each_possible_cpu(i) {
684 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
685 unsigned int start;
Eric Dumazet97932412009-11-17 04:53:09 +0000686
Li RongQing5a4ae5f2014-04-21 19:49:08 +0800687 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
688 do {
689 start = u64_stats_fetch_begin_irq(&p->syncp);
690 rxpackets = p->rx_packets;
691 rxbytes = p->rx_bytes;
692 rxmulticast = p->rx_multicast;
693 txpackets = p->tx_packets;
694 txbytes = p->tx_bytes;
695 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000696
Li RongQing5a4ae5f2014-04-21 19:49:08 +0800697 stats->rx_packets += rxpackets;
698 stats->rx_bytes += rxbytes;
699 stats->multicast += rxmulticast;
700 stats->tx_packets += txpackets;
701 stats->tx_bytes += txbytes;
702 /* rx_errors & tx_dropped are u32 */
703 rx_errors += p->rx_errors;
704 tx_dropped += p->tx_dropped;
Eric Dumazet97932412009-11-17 04:53:09 +0000705 }
Li RongQing5a4ae5f2014-04-21 19:49:08 +0800706 stats->rx_errors = rx_errors;
707 stats->tx_dropped = tx_dropped;
708
Eric Dumazet97932412009-11-17 04:53:09 +0000709 return stats;
710}
711
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000712#ifdef CONFIG_NET_POLL_CONTROLLER
Eric Dumazetde93cb22011-12-13 20:57:54 +0000713static void vlan_dev_poll_controller(struct net_device *dev)
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000714{
715 return;
716}
717
Eric W. Biedermana8779ec2014-03-27 15:36:38 -0700718static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000719{
Amerigo Wangf3da3892012-08-10 01:24:47 +0000720 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
721 struct net_device *real_dev = vlan->real_dev;
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000722 struct netpoll *netpoll;
723 int err = 0;
724
Eric W. Biedermana8779ec2014-03-27 15:36:38 -0700725 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000726 err = -ENOMEM;
727 if (!netpoll)
728 goto out;
729
Eric W. Biedermana8779ec2014-03-27 15:36:38 -0700730 err = __netpoll_setup(netpoll, real_dev);
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000731 if (err) {
732 kfree(netpoll);
733 goto out;
734 }
735
Amerigo Wangf3da3892012-08-10 01:24:47 +0000736 vlan->netpoll = netpoll;
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000737
738out:
739 return err;
740}
741
Eric Dumazetde93cb22011-12-13 20:57:54 +0000742static void vlan_dev_netpoll_cleanup(struct net_device *dev)
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000743{
Amerigo Wangf3da3892012-08-10 01:24:47 +0000744 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
745 struct netpoll *netpoll = vlan->netpoll;
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000746
747 if (!netpoll)
748 return;
749
Amerigo Wangf3da3892012-08-10 01:24:47 +0000750 vlan->netpoll = NULL;
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000751
Neil Horman2cde6ac2013-02-11 10:25:30 +0000752 __netpoll_free_async(netpoll);
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000753}
754#endif /* CONFIG_NET_POLL_CONTROLLER */
755
Nicolas Dichtel2dbf6b52015-04-02 17:07:04 +0200756static int vlan_dev_get_iflink(const struct net_device *dev)
757{
758 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
759
760 return real_dev->ifindex;
761}
762
Patrick McHardy75b88462008-07-08 03:22:42 -0700763static const struct ethtool_ops vlan_ethtool_ops = {
David Decotigny57709792016-02-24 10:58:08 -0800764 .get_link_ksettings = vlan_ethtool_get_link_ksettings,
Stephen Hemmingerb30200612008-10-28 22:12:36 -0700765 .get_drvinfo = vlan_ethtool_get_drvinfo,
Patrick McHardy75b88462008-07-08 03:22:42 -0700766 .get_link = ethtool_op_get_link,
Richard Cochran37dd9252014-11-21 14:16:20 +0100767 .get_ts_info = vlan_ethtool_get_ts_info,
Patrick McHardy75b88462008-07-08 03:22:42 -0700768};
769
Stephen Hemminger656299f2008-11-19 21:53:47 -0800770static const struct net_device_ops vlan_netdev_ops = {
771 .ndo_change_mtu = vlan_dev_change_mtu,
772 .ndo_init = vlan_dev_init,
773 .ndo_uninit = vlan_dev_uninit,
774 .ndo_open = vlan_dev_open,
775 .ndo_stop = vlan_dev_stop,
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800776 .ndo_start_xmit = vlan_dev_hard_start_xmit,
777 .ndo_validate_addr = eth_validate_addr,
778 .ndo_set_mac_address = vlan_dev_set_mac_address,
779 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800780 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
781 .ndo_do_ioctl = vlan_dev_ioctl,
Frank Blaschkacc883d12009-01-08 10:50:20 -0800782 .ndo_neigh_setup = vlan_dev_neigh_setup,
Eric Dumazet9618e2f2010-06-24 00:55:06 +0000783 .ndo_get_stats64 = vlan_dev_get_stats64,
Amerigo Wangf4d53922012-10-29 17:22:28 +0000784#if IS_ENABLED(CONFIG_FCOE)
Vasu Devb85daa52009-08-14 12:41:07 +0000785 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
786 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
Yi Zou0af46d92009-08-31 12:31:55 +0000787 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
788 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
Yi Zoud6534792009-10-28 18:25:16 +0000789 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
Yi Zou4ea09c92011-02-01 07:22:11 +0000790 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
Vasu Devb85daa52009-08-14 12:41:07 +0000791#endif
Benjamin LaHaise6d4cdf42011-12-08 06:20:49 +0000792#ifdef CONFIG_NET_POLL_CONTROLLER
793 .ndo_poll_controller = vlan_dev_poll_controller,
794 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
795 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
796#endif
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700797 .ndo_fix_features = vlan_dev_fix_features,
Jiri Pirko18bfb922016-07-05 11:27:38 +0200798 .ndo_neigh_construct = netdev_default_l2upper_neigh_construct,
799 .ndo_neigh_destroy = netdev_default_l2upper_neigh_destroy,
Ido Schimmel9d547832015-12-15 16:03:34 +0100800 .ndo_fdb_add = switchdev_port_fdb_add,
801 .ndo_fdb_del = switchdev_port_fdb_del,
802 .ndo_fdb_dump = switchdev_port_fdb_dump,
803 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
804 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
805 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
Vlad Yasevichd38569a2014-05-16 17:04:55 -0400806 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass,
Nicolas Dichtel2dbf6b52015-04-02 17:07:04 +0200807 .ndo_get_iflink = vlan_dev_get_iflink,
Eric Dumazetf7d1b9f2008-12-25 16:45:19 -0800808};
809
Eric Dumazeta48e5fa2014-07-02 02:25:15 -0700810static void vlan_dev_free(struct net_device *dev)
811{
812 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
813
814 free_percpu(vlan->vlan_pcpu_stats);
815 vlan->vlan_pcpu_stats = NULL;
816 free_netdev(dev);
817}
818
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800819void vlan_setup(struct net_device *dev)
820{
821 ether_setup(dev);
822
Phil Sutter2e659c02015-08-18 10:30:36 +0200823 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE;
Zhang Shengjue817af22016-02-18 10:00:11 +0000824 dev->priv_flags |= IFF_UNICAST_FLT;
Eric Dumazet02875872014-10-05 18:38:35 -0700825 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
826 netif_keep_dst(dev);
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800827
Stephen Hemminger656299f2008-11-19 21:53:47 -0800828 dev->netdev_ops = &vlan_netdev_ops;
Eric Dumazeta48e5fa2014-07-02 02:25:15 -0700829 dev->destructor = vlan_dev_free;
Patrick McHardy75b88462008-07-08 03:22:42 -0700830 dev->ethtool_ops = &vlan_ethtool_ops;
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800831
Joe Perches423049a2015-03-02 19:54:52 -0800832 eth_zero_addr(dev->broadcast);
Patrick McHardyef3eb3e2008-01-21 00:22:11 -0800833}