1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Ethernet-type device handling.
6 * Authors: Ben Greear <greearb@candelatech.com>
7 * Please send support related email to: netdev@vger.kernel.org
8 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
10 * Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com>
11 * - reset skb->pkt_type on incoming packets when MAC was changed
12 * - see that changed MAC is saddr for outgoing packets
13 * Oct 20, 2001: Ard van Breeman:
14 * - Fix MC-list, finally.
15 * - Flush MC-list on VLAN destroy.
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20 #include <linux/module.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/netdevice.h>
24 #include <linux/net_tstamp.h>
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/phy.h>
29 #include <net/macsec.h>
33 #include <linux/if_vlan.h>
34 #include <linux/netpoll.h>
37 * Create the VLAN header for an arbitrary protocol layer
39 * saddr=NULL means use device source address
40 * daddr=NULL means leave destination address (eg unresolved arp)
42 * This is called when the SKB is moving down the stack towards the
45 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
47 const void *daddr, const void *saddr,
50 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
51 struct vlan_hdr *vhdr;
52 unsigned int vhdrlen = 0;
56 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
57 vhdr = skb_push(skb, VLAN_HLEN);
59 vlan_tci = vlan->vlan_id;
60 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
61 vhdr->h_vlan_TCI = htons(vlan_tci);
64 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
65 * put the length in here instead.
67 if (type != ETH_P_802_3 && type != ETH_P_802_2)
68 vhdr->h_vlan_encapsulated_proto = htons(type);
70 vhdr->h_vlan_encapsulated_proto = htons(len);
72 skb->protocol = vlan->vlan_proto;
73 type = ntohs(vlan->vlan_proto);
77 /* Before delegating work to the lower layer, enter our MAC-address */
79 saddr = dev->dev_addr;
81 /* Now make the underlying real hard header */
83 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
89 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
91 #ifdef CONFIG_NET_POLL_CONTROLLER
92 return netpoll_send_skb(vlan->netpoll, skb);
99 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
100 struct net_device *dev)
102 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
103 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
107 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
109 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
110 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
112 if (vlan->flags & VLAN_FLAG_REORDER_HDR ||
113 veth->h_vlan_proto != vlan->vlan_proto) {
115 vlan_tci = vlan->vlan_id;
116 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
117 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
120 skb->dev = vlan->real_dev;
122 if (unlikely(netpoll_tx_running(dev)))
123 return vlan_netpoll_send_skb(vlan, skb);
125 ret = dev_queue_xmit(skb);
127 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
128 struct vlan_pcpu_stats *stats;
130 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
131 u64_stats_update_begin(&stats->syncp);
132 u64_stats_inc(&stats->tx_packets);
133 u64_stats_add(&stats->tx_bytes, len);
134 u64_stats_update_end(&stats->syncp);
136 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
142 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
144 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
145 unsigned int max_mtu = real_dev->mtu;
147 if (netif_reduces_vlan_mtu(real_dev))
148 max_mtu -= VLAN_HLEN;
149 if (max_mtu < new_mtu)
157 void vlan_dev_set_ingress_priority(const struct net_device *dev,
158 u32 skb_prio, u16 vlan_prio)
160 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
162 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
163 vlan->nr_ingress_mappings--;
164 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
165 vlan->nr_ingress_mappings++;
167 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
170 int vlan_dev_set_egress_priority(const struct net_device *dev,
171 u32 skb_prio, u16 vlan_prio)
173 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
174 struct vlan_priority_tci_mapping *mp = NULL;
175 struct vlan_priority_tci_mapping *np;
176 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
178 /* See if a priority mapping exists.. */
179 mp = vlan->egress_priority_map[skb_prio & 0xF];
181 if (mp->priority == skb_prio) {
182 if (mp->vlan_qos && !vlan_qos)
183 vlan->nr_egress_mappings--;
184 else if (!mp->vlan_qos && vlan_qos)
185 vlan->nr_egress_mappings++;
186 mp->vlan_qos = vlan_qos;
192 /* Create a new mapping then. */
193 mp = vlan->egress_priority_map[skb_prio & 0xF];
194 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
199 np->priority = skb_prio;
200 np->vlan_qos = vlan_qos;
201 /* Before inserting this element in hash table, make sure all its fields
202 * are committed to memory.
203 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
206 vlan->egress_priority_map[skb_prio & 0xF] = np;
208 vlan->nr_egress_mappings++;
212 /* Flags are defined in the vlan_flags enum in
213 * include/uapi/linux/if_vlan.h file.
215 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
217 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
218 u32 old_flags = vlan->flags;
220 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
221 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP |
222 VLAN_FLAG_BRIDGE_BINDING))
225 vlan->flags = (old_flags & ~mask) | (flags & mask);
227 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
228 if (vlan->flags & VLAN_FLAG_GVRP)
229 vlan_gvrp_request_join(dev);
231 vlan_gvrp_request_leave(dev);
234 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
235 if (vlan->flags & VLAN_FLAG_MVRP)
236 vlan_mvrp_request_join(dev);
238 vlan_mvrp_request_leave(dev);
243 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result, size_t size)
245 strscpy_pad(result, vlan_dev_priv(dev)->real_dev->name, size);
248 bool vlan_dev_inherit_address(struct net_device *dev,
249 struct net_device *real_dev)
251 if (dev->addr_assign_type != NET_ADDR_STOLEN)
254 eth_hw_addr_set(dev, real_dev->dev_addr);
255 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
259 static int vlan_dev_open(struct net_device *dev)
261 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
262 struct net_device *real_dev = vlan->real_dev;
265 if (!(real_dev->flags & IFF_UP) &&
266 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
269 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) &&
270 !vlan_dev_inherit_address(dev, real_dev)) {
271 err = dev_uc_add(real_dev, dev->dev_addr);
276 if (dev->flags & IFF_ALLMULTI) {
277 err = dev_set_allmulti(real_dev, 1);
281 if (dev->flags & IFF_PROMISC) {
282 err = dev_set_promiscuity(real_dev, 1);
287 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
289 if (vlan->flags & VLAN_FLAG_GVRP)
290 vlan_gvrp_request_join(dev);
292 if (vlan->flags & VLAN_FLAG_MVRP)
293 vlan_mvrp_request_join(dev);
295 if (netif_carrier_ok(real_dev) &&
296 !(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
297 netif_carrier_on(dev);
301 if (dev->flags & IFF_ALLMULTI)
302 dev_set_allmulti(real_dev, -1);
304 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
305 dev_uc_del(real_dev, dev->dev_addr);
307 netif_carrier_off(dev);
311 static int vlan_dev_stop(struct net_device *dev)
313 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
314 struct net_device *real_dev = vlan->real_dev;
316 dev_mc_unsync(real_dev, dev);
317 dev_uc_unsync(real_dev, dev);
318 if (dev->flags & IFF_ALLMULTI)
319 dev_set_allmulti(real_dev, -1);
320 if (dev->flags & IFF_PROMISC)
321 dev_set_promiscuity(real_dev, -1);
323 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
324 dev_uc_del(real_dev, dev->dev_addr);
326 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
327 netif_carrier_off(dev);
331 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
333 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
334 struct sockaddr *addr = p;
337 if (!is_valid_ether_addr(addr->sa_data))
338 return -EADDRNOTAVAIL;
340 if (!(dev->flags & IFF_UP))
343 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
344 err = dev_uc_add(real_dev, addr->sa_data);
349 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
350 dev_uc_del(real_dev, dev->dev_addr);
353 eth_hw_addr_set(dev, addr->sa_data);
357 static int vlan_hwtstamp_get(struct net_device *dev,
358 struct kernel_hwtstamp_config *cfg)
360 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
362 return generic_hwtstamp_get_lower(real_dev, cfg);
365 static int vlan_hwtstamp_set(struct net_device *dev,
366 struct kernel_hwtstamp_config *cfg,
367 struct netlink_ext_ack *extack)
369 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
371 if (!net_eq(dev_net(dev), dev_net(real_dev)))
374 return generic_hwtstamp_set_lower(real_dev, cfg, extack);
377 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
379 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
380 const struct net_device_ops *ops = real_dev->netdev_ops;
382 int err = -EOPNOTSUPP;
384 strscpy_pad(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
385 ifrr.ifr_ifru = ifr->ifr_ifru;
391 if (netif_device_present(real_dev) && ops->ndo_eth_ioctl)
392 err = ops->ndo_eth_ioctl(real_dev, &ifrr, cmd);
397 ifr->ifr_ifru = ifrr.ifr_ifru;
402 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
404 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
405 const struct net_device_ops *ops = real_dev->netdev_ops;
408 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
409 err = ops->ndo_neigh_setup(real_dev, pa);
414 #if IS_ENABLED(CONFIG_FCOE)
415 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
416 struct scatterlist *sgl, unsigned int sgc)
418 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
419 const struct net_device_ops *ops = real_dev->netdev_ops;
422 if (ops->ndo_fcoe_ddp_setup)
423 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
428 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
430 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
431 const struct net_device_ops *ops = real_dev->netdev_ops;
434 if (ops->ndo_fcoe_ddp_done)
435 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
440 static int vlan_dev_fcoe_enable(struct net_device *dev)
442 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
443 const struct net_device_ops *ops = real_dev->netdev_ops;
446 if (ops->ndo_fcoe_enable)
447 rc = ops->ndo_fcoe_enable(real_dev);
451 static int vlan_dev_fcoe_disable(struct net_device *dev)
453 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
454 const struct net_device_ops *ops = real_dev->netdev_ops;
457 if (ops->ndo_fcoe_disable)
458 rc = ops->ndo_fcoe_disable(real_dev);
462 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
463 struct scatterlist *sgl, unsigned int sgc)
465 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
466 const struct net_device_ops *ops = real_dev->netdev_ops;
469 if (ops->ndo_fcoe_ddp_target)
470 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
476 #ifdef NETDEV_FCOE_WWNN
477 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
479 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
480 const struct net_device_ops *ops = real_dev->netdev_ops;
483 if (ops->ndo_fcoe_get_wwn)
484 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
489 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
491 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
493 if (dev->flags & IFF_UP) {
494 if (change & IFF_ALLMULTI)
495 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
496 if (change & IFF_PROMISC)
497 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
501 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
503 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
504 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
508 * vlan network devices have devices nesting below it, and are a special
509 * "super class" of normal network devices; split their locks off into a
510 * separate class since they always nest.
512 static struct lock_class_key vlan_netdev_xmit_lock_key;
513 static struct lock_class_key vlan_netdev_addr_lock_key;
515 static void vlan_dev_set_lockdep_one(struct net_device *dev,
516 struct netdev_queue *txq,
519 lockdep_set_class(&txq->_xmit_lock, &vlan_netdev_xmit_lock_key);
522 static void vlan_dev_set_lockdep_class(struct net_device *dev)
524 lockdep_set_class(&dev->addr_list_lock,
525 &vlan_netdev_addr_lock_key);
526 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, NULL);
529 static __be16 vlan_parse_protocol(const struct sk_buff *skb)
531 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
533 return __vlan_get_protocol(skb, veth->h_vlan_proto, NULL);
536 static const struct header_ops vlan_header_ops = {
537 .create = vlan_dev_hard_header,
538 .parse = eth_header_parse,
539 .parse_protocol = vlan_parse_protocol,
542 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
544 const void *daddr, const void *saddr,
547 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
548 struct net_device *real_dev = vlan->real_dev;
551 saddr = dev->dev_addr;
553 return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
556 static const struct header_ops vlan_passthru_header_ops = {
557 .create = vlan_passthru_hard_header,
558 .parse = eth_header_parse,
559 .parse_protocol = vlan_parse_protocol,
562 static struct device_type vlan_type = {
566 static const struct net_device_ops vlan_netdev_ops;
568 static int vlan_dev_init(struct net_device *dev)
570 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
571 struct net_device *real_dev = vlan->real_dev;
573 netif_carrier_off(dev);
575 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
576 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
577 IFF_MASTER | IFF_SLAVE);
578 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
579 (1<<__LINK_STATE_DORMANT))) |
580 (1<<__LINK_STATE_PRESENT);
582 if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING)
583 dev->state |= (1 << __LINK_STATE_NOCARRIER);
585 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
586 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
587 NETIF_F_GSO_ENCAP_ALL |
588 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
591 if (real_dev->vlan_features & NETIF_F_HW_MACSEC)
592 dev->hw_features |= NETIF_F_HW_MACSEC;
594 dev->features |= dev->hw_features | NETIF_F_LLTX;
595 netif_inherit_tso_max(dev, real_dev);
596 if (dev->features & NETIF_F_VLAN_FEATURES)
597 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
599 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
600 dev->hw_enc_features = vlan_tnl_features(real_dev);
601 dev->mpls_features = real_dev->mpls_features;
603 /* ipv6 shared card related stuff */
604 dev->dev_id = real_dev->dev_id;
606 if (is_zero_ether_addr(dev->dev_addr)) {
607 eth_hw_addr_set(dev, real_dev->dev_addr);
608 dev->addr_assign_type = NET_ADDR_STOLEN;
610 if (is_zero_ether_addr(dev->broadcast))
611 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
613 #if IS_ENABLED(CONFIG_FCOE)
614 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
617 dev->needed_headroom = real_dev->needed_headroom;
618 if (vlan_hw_offload_capable(real_dev->features, vlan->vlan_proto)) {
619 dev->header_ops = &vlan_passthru_header_ops;
620 dev->hard_header_len = real_dev->hard_header_len;
622 dev->header_ops = &vlan_header_ops;
623 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
626 dev->netdev_ops = &vlan_netdev_ops;
628 SET_NETDEV_DEVTYPE(dev, &vlan_type);
630 vlan_dev_set_lockdep_class(dev);
632 vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
633 if (!vlan->vlan_pcpu_stats)
636 /* Get vlan's reference to real_dev */
637 netdev_hold(real_dev, &vlan->dev_tracker, GFP_KERNEL);
642 /* Note: this function might be called multiple times for the same device. */
643 void vlan_dev_free_egress_priority(const struct net_device *dev)
645 struct vlan_priority_tci_mapping *pm;
646 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
649 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
650 while ((pm = vlan->egress_priority_map[i]) != NULL) {
651 vlan->egress_priority_map[i] = pm->next;
657 static void vlan_dev_uninit(struct net_device *dev)
659 vlan_dev_free_egress_priority(dev);
662 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
663 netdev_features_t features)
665 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
666 netdev_features_t old_features = features;
667 netdev_features_t lower_features;
669 lower_features = netdev_intersect_features((real_dev->vlan_features |
673 /* Add HW_CSUM setting to preserve user ability to control
674 * checksum offload on the vlan device.
676 if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
677 lower_features |= NETIF_F_HW_CSUM;
678 features = netdev_intersect_features(features, lower_features);
679 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
680 features |= NETIF_F_LLTX;
685 static int vlan_ethtool_get_link_ksettings(struct net_device *dev,
686 struct ethtool_link_ksettings *cmd)
688 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
690 return __ethtool_get_link_ksettings(vlan->real_dev, cmd);
693 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
694 struct ethtool_drvinfo *info)
696 strscpy(info->driver, vlan_fullname, sizeof(info->driver));
697 strscpy(info->version, vlan_version, sizeof(info->version));
698 strscpy(info->fw_version, "N/A", sizeof(info->fw_version));
701 static int vlan_ethtool_get_ts_info(struct net_device *dev,
702 struct ethtool_ts_info *info)
704 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
705 return ethtool_get_ts_info_by_layer(vlan->real_dev, info);
708 static void vlan_dev_get_stats64(struct net_device *dev,
709 struct rtnl_link_stats64 *stats)
711 struct vlan_pcpu_stats *p;
712 u32 rx_errors = 0, tx_dropped = 0;
715 for_each_possible_cpu(i) {
716 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
719 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
721 start = u64_stats_fetch_begin(&p->syncp);
722 rxpackets = u64_stats_read(&p->rx_packets);
723 rxbytes = u64_stats_read(&p->rx_bytes);
724 rxmulticast = u64_stats_read(&p->rx_multicast);
725 txpackets = u64_stats_read(&p->tx_packets);
726 txbytes = u64_stats_read(&p->tx_bytes);
727 } while (u64_stats_fetch_retry(&p->syncp, start));
729 stats->rx_packets += rxpackets;
730 stats->rx_bytes += rxbytes;
731 stats->multicast += rxmulticast;
732 stats->tx_packets += txpackets;
733 stats->tx_bytes += txbytes;
734 /* rx_errors & tx_dropped are u32 */
735 rx_errors += READ_ONCE(p->rx_errors);
736 tx_dropped += READ_ONCE(p->tx_dropped);
738 stats->rx_errors = rx_errors;
739 stats->tx_dropped = tx_dropped;
742 #ifdef CONFIG_NET_POLL_CONTROLLER
743 static void vlan_dev_poll_controller(struct net_device *dev)
748 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
750 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
751 struct net_device *real_dev = vlan->real_dev;
752 struct netpoll *netpoll;
755 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
760 err = __netpoll_setup(netpoll, real_dev);
766 vlan->netpoll = netpoll;
772 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
774 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
775 struct netpoll *netpoll = vlan->netpoll;
780 vlan->netpoll = NULL;
781 __netpoll_free(netpoll);
783 #endif /* CONFIG_NET_POLL_CONTROLLER */
785 static int vlan_dev_get_iflink(const struct net_device *dev)
787 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
789 return real_dev->ifindex;
792 static int vlan_dev_fill_forward_path(struct net_device_path_ctx *ctx,
793 struct net_device_path *path)
795 struct vlan_dev_priv *vlan = vlan_dev_priv(ctx->dev);
797 path->type = DEV_PATH_VLAN;
798 path->encap.id = vlan->vlan_id;
799 path->encap.proto = vlan->vlan_proto;
800 path->dev = ctx->dev;
801 ctx->dev = vlan->real_dev;
802 if (ctx->num_vlans >= ARRAY_SIZE(ctx->vlan))
805 ctx->vlan[ctx->num_vlans].id = vlan->vlan_id;
806 ctx->vlan[ctx->num_vlans].proto = vlan->vlan_proto;
812 #if IS_ENABLED(CONFIG_MACSEC)
814 static const struct macsec_ops *vlan_get_macsec_ops(const struct macsec_context *ctx)
816 return vlan_dev_priv(ctx->netdev)->real_dev->macsec_ops;
819 static int vlan_macsec_offload(int (* const func)(struct macsec_context *),
820 struct macsec_context *ctx)
828 static int vlan_macsec_dev_open(struct macsec_context *ctx)
830 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
835 return vlan_macsec_offload(ops->mdo_dev_open, ctx);
838 static int vlan_macsec_dev_stop(struct macsec_context *ctx)
840 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
845 return vlan_macsec_offload(ops->mdo_dev_stop, ctx);
848 static int vlan_macsec_add_secy(struct macsec_context *ctx)
850 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
855 return vlan_macsec_offload(ops->mdo_add_secy, ctx);
858 static int vlan_macsec_upd_secy(struct macsec_context *ctx)
860 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
865 return vlan_macsec_offload(ops->mdo_upd_secy, ctx);
868 static int vlan_macsec_del_secy(struct macsec_context *ctx)
870 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
875 return vlan_macsec_offload(ops->mdo_del_secy, ctx);
878 static int vlan_macsec_add_rxsc(struct macsec_context *ctx)
880 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
885 return vlan_macsec_offload(ops->mdo_add_rxsc, ctx);
888 static int vlan_macsec_upd_rxsc(struct macsec_context *ctx)
890 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
895 return vlan_macsec_offload(ops->mdo_upd_rxsc, ctx);
898 static int vlan_macsec_del_rxsc(struct macsec_context *ctx)
900 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
905 return vlan_macsec_offload(ops->mdo_del_rxsc, ctx);
908 static int vlan_macsec_add_rxsa(struct macsec_context *ctx)
910 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
915 return vlan_macsec_offload(ops->mdo_add_rxsa, ctx);
918 static int vlan_macsec_upd_rxsa(struct macsec_context *ctx)
920 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
925 return vlan_macsec_offload(ops->mdo_upd_rxsa, ctx);
928 static int vlan_macsec_del_rxsa(struct macsec_context *ctx)
930 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
935 return vlan_macsec_offload(ops->mdo_del_rxsa, ctx);
938 static int vlan_macsec_add_txsa(struct macsec_context *ctx)
940 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
945 return vlan_macsec_offload(ops->mdo_add_txsa, ctx);
948 static int vlan_macsec_upd_txsa(struct macsec_context *ctx)
950 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
955 return vlan_macsec_offload(ops->mdo_upd_txsa, ctx);
958 static int vlan_macsec_del_txsa(struct macsec_context *ctx)
960 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
965 return vlan_macsec_offload(ops->mdo_del_txsa, ctx);
968 static int vlan_macsec_get_dev_stats(struct macsec_context *ctx)
970 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
975 return vlan_macsec_offload(ops->mdo_get_dev_stats, ctx);
978 static int vlan_macsec_get_tx_sc_stats(struct macsec_context *ctx)
980 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
985 return vlan_macsec_offload(ops->mdo_get_tx_sc_stats, ctx);
988 static int vlan_macsec_get_tx_sa_stats(struct macsec_context *ctx)
990 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
995 return vlan_macsec_offload(ops->mdo_get_tx_sa_stats, ctx);
998 static int vlan_macsec_get_rx_sc_stats(struct macsec_context *ctx)
1000 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
1005 return vlan_macsec_offload(ops->mdo_get_rx_sc_stats, ctx);
1008 static int vlan_macsec_get_rx_sa_stats(struct macsec_context *ctx)
1010 const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
1015 return vlan_macsec_offload(ops->mdo_get_rx_sa_stats, ctx);
1018 static const struct macsec_ops macsec_offload_ops = {
1020 .mdo_dev_open = vlan_macsec_dev_open,
1021 .mdo_dev_stop = vlan_macsec_dev_stop,
1023 .mdo_add_secy = vlan_macsec_add_secy,
1024 .mdo_upd_secy = vlan_macsec_upd_secy,
1025 .mdo_del_secy = vlan_macsec_del_secy,
1026 /* Security channels */
1027 .mdo_add_rxsc = vlan_macsec_add_rxsc,
1028 .mdo_upd_rxsc = vlan_macsec_upd_rxsc,
1029 .mdo_del_rxsc = vlan_macsec_del_rxsc,
1030 /* Security associations */
1031 .mdo_add_rxsa = vlan_macsec_add_rxsa,
1032 .mdo_upd_rxsa = vlan_macsec_upd_rxsa,
1033 .mdo_del_rxsa = vlan_macsec_del_rxsa,
1034 .mdo_add_txsa = vlan_macsec_add_txsa,
1035 .mdo_upd_txsa = vlan_macsec_upd_txsa,
1036 .mdo_del_txsa = vlan_macsec_del_txsa,
1038 .mdo_get_dev_stats = vlan_macsec_get_dev_stats,
1039 .mdo_get_tx_sc_stats = vlan_macsec_get_tx_sc_stats,
1040 .mdo_get_tx_sa_stats = vlan_macsec_get_tx_sa_stats,
1041 .mdo_get_rx_sc_stats = vlan_macsec_get_rx_sc_stats,
1042 .mdo_get_rx_sa_stats = vlan_macsec_get_rx_sa_stats,
1047 static const struct ethtool_ops vlan_ethtool_ops = {
1048 .get_link_ksettings = vlan_ethtool_get_link_ksettings,
1049 .get_drvinfo = vlan_ethtool_get_drvinfo,
1050 .get_link = ethtool_op_get_link,
1051 .get_ts_info = vlan_ethtool_get_ts_info,
1054 static const struct net_device_ops vlan_netdev_ops = {
1055 .ndo_change_mtu = vlan_dev_change_mtu,
1056 .ndo_init = vlan_dev_init,
1057 .ndo_uninit = vlan_dev_uninit,
1058 .ndo_open = vlan_dev_open,
1059 .ndo_stop = vlan_dev_stop,
1060 .ndo_start_xmit = vlan_dev_hard_start_xmit,
1061 .ndo_validate_addr = eth_validate_addr,
1062 .ndo_set_mac_address = vlan_dev_set_mac_address,
1063 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
1064 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
1065 .ndo_eth_ioctl = vlan_dev_ioctl,
1066 .ndo_neigh_setup = vlan_dev_neigh_setup,
1067 .ndo_get_stats64 = vlan_dev_get_stats64,
1068 #if IS_ENABLED(CONFIG_FCOE)
1069 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
1070 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
1071 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
1072 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
1073 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
1075 #ifdef NETDEV_FCOE_WWNN
1076 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
1078 #ifdef CONFIG_NET_POLL_CONTROLLER
1079 .ndo_poll_controller = vlan_dev_poll_controller,
1080 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
1081 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
1083 .ndo_fix_features = vlan_dev_fix_features,
1084 .ndo_get_iflink = vlan_dev_get_iflink,
1085 .ndo_fill_forward_path = vlan_dev_fill_forward_path,
1086 .ndo_hwtstamp_get = vlan_hwtstamp_get,
1087 .ndo_hwtstamp_set = vlan_hwtstamp_set,
1090 static void vlan_dev_free(struct net_device *dev)
1092 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
1094 free_percpu(vlan->vlan_pcpu_stats);
1095 vlan->vlan_pcpu_stats = NULL;
1097 /* Get rid of the vlan's reference to real_dev */
1098 netdev_put(vlan->real_dev, &vlan->dev_tracker);
1101 void vlan_setup(struct net_device *dev)
1105 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE;
1106 dev->priv_flags |= IFF_UNICAST_FLT;
1107 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1108 netif_keep_dst(dev);
1110 dev->netdev_ops = &vlan_netdev_ops;
1111 dev->needs_free_netdev = true;
1112 dev->priv_destructor = vlan_dev_free;
1113 dev->ethtool_ops = &vlan_ethtool_ops;
1115 #if IS_ENABLED(CONFIG_MACSEC)
1116 dev->macsec_ops = &macsec_offload_ops;
1119 dev->max_mtu = ETH_MAX_MTU;
1121 eth_zero_addr(dev->broadcast);