vlan_dev.c 21 KB

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  1. /* -*- linux-c -*-
  2. * INET 802.1Q VLAN
  3. * Ethernet-type device handling.
  4. *
  5. * Authors: Ben Greear <greearb@candelatech.com>
  6. * Please send support related email to: netdev@vger.kernel.org
  7. * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
  8. *
  9. * 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.
  15. *
  16. *
  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. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  23. #include <linux/module.h>
  24. #include <linux/slab.h>
  25. #include <linux/skbuff.h>
  26. #include <linux/netdevice.h>
  27. #include <linux/etherdevice.h>
  28. #include <linux/ethtool.h>
  29. #include <net/arp.h>
  30. #include "vlan.h"
  31. #include "vlanproc.h"
  32. #include <linux/if_vlan.h>
  33. #include <linux/netpoll.h>
  34. /*
  35. * Rebuild the Ethernet MAC header. This is called after an ARP
  36. * (or in future other address resolution) has completed on this
  37. * sk_buff. We now let ARP fill in the other fields.
  38. *
  39. * This routine CANNOT use cached dst->neigh!
  40. * Really, it is used only when dst->neigh is wrong.
  41. *
  42. * TODO: This needs a checkup, I'm ignorant here. --BLG
  43. */
  44. static int vlan_dev_rebuild_header(struct sk_buff *skb)
  45. {
  46. struct net_device *dev = skb->dev;
  47. struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
  48. switch (veth->h_vlan_encapsulated_proto) {
  49. #ifdef CONFIG_INET
  50. case htons(ETH_P_IP):
  51. /* TODO: Confirm this will work with VLAN headers... */
  52. return arp_find(veth->h_dest, skb);
  53. #endif
  54. default:
  55. pr_debug("%s: unable to resolve type %X addresses\n",
  56. dev->name, ntohs(veth->h_vlan_encapsulated_proto));
  57. memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
  58. break;
  59. }
  60. return 0;
  61. }
  62. static inline u16
  63. vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
  64. {
  65. struct vlan_priority_tci_mapping *mp;
  66. mp = vlan_dev_priv(dev)->egress_priority_map[(skb->priority & 0xF)];
  67. while (mp) {
  68. if (mp->priority == skb->priority) {
  69. return mp->vlan_qos; /* This should already be shifted
  70. * to mask correctly with the
  71. * VLAN's TCI */
  72. }
  73. mp = mp->next;
  74. }
  75. return 0;
  76. }
  77. /*
  78. * Create the VLAN header for an arbitrary protocol layer
  79. *
  80. * saddr=NULL means use device source address
  81. * daddr=NULL means leave destination address (eg unresolved arp)
  82. *
  83. * This is called when the SKB is moving down the stack towards the
  84. * physical devices.
  85. */
  86. static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
  87. unsigned short type,
  88. const void *daddr, const void *saddr,
  89. unsigned int len)
  90. {
  91. struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  92. struct vlan_hdr *vhdr;
  93. unsigned int vhdrlen = 0;
  94. u16 vlan_tci = 0;
  95. int rc;
  96. if (!(vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
  97. vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
  98. vlan_tci = vlan_dev_priv(dev)->vlan_id;
  99. vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
  100. vhdr->h_vlan_TCI = htons(vlan_tci);
  101. /*
  102. * Set the protocol type. For a packet of type ETH_P_802_3/2 we
  103. * put the length in here instead.
  104. */
  105. if (type != ETH_P_802_3 && type != ETH_P_802_2)
  106. vhdr->h_vlan_encapsulated_proto = htons(type);
  107. else
  108. vhdr->h_vlan_encapsulated_proto = htons(len);
  109. skb->protocol = vlan->vlan_proto;
  110. type = ntohs(vlan->vlan_proto);
  111. vhdrlen = VLAN_HLEN;
  112. }
  113. /* Before delegating work to the lower layer, enter our MAC-address */
  114. if (saddr == NULL)
  115. saddr = dev->dev_addr;
  116. /* Now make the underlying real hard header */
  117. dev = vlan_dev_priv(dev)->real_dev;
  118. rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
  119. if (rc > 0)
  120. rc += vhdrlen;
  121. return rc;
  122. }
  123. static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
  124. {
  125. #ifdef CONFIG_NET_POLL_CONTROLLER
  126. if (vlan->netpoll)
  127. netpoll_send_skb(vlan->netpoll, skb);
  128. #else
  129. BUG();
  130. #endif
  131. return NETDEV_TX_OK;
  132. }
  133. static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
  134. struct net_device *dev)
  135. {
  136. struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  137. struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
  138. unsigned int len;
  139. int ret;
  140. /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
  141. *
  142. * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
  143. * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
  144. */
  145. if (veth->h_vlan_proto != vlan->vlan_proto ||
  146. vlan->flags & VLAN_FLAG_REORDER_HDR) {
  147. u16 vlan_tci;
  148. vlan_tci = vlan->vlan_id;
  149. vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
  150. skb = __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
  151. }
  152. skb->dev = vlan->real_dev;
  153. len = skb->len;
  154. if (unlikely(netpoll_tx_running(dev)))
  155. return vlan_netpoll_send_skb(vlan, skb);
  156. ret = dev_queue_xmit(skb);
  157. if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
  158. struct vlan_pcpu_stats *stats;
  159. stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
  160. u64_stats_update_begin(&stats->syncp);
  161. stats->tx_packets++;
  162. stats->tx_bytes += len;
  163. u64_stats_update_end(&stats->syncp);
  164. } else {
  165. this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
  166. }
  167. return ret;
  168. }
  169. static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
  170. {
  171. /* TODO: gotta make sure the underlying layer can handle it,
  172. * maybe an IFF_VLAN_CAPABLE flag for devices?
  173. */
  174. if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu)
  175. return -ERANGE;
  176. dev->mtu = new_mtu;
  177. return 0;
  178. }
  179. void vlan_dev_set_ingress_priority(const struct net_device *dev,
  180. u32 skb_prio, u16 vlan_prio)
  181. {
  182. struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  183. if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
  184. vlan->nr_ingress_mappings--;
  185. else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
  186. vlan->nr_ingress_mappings++;
  187. vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
  188. }
  189. int vlan_dev_set_egress_priority(const struct net_device *dev,
  190. u32 skb_prio, u16 vlan_prio)
  191. {
  192. struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  193. struct vlan_priority_tci_mapping *mp = NULL;
  194. struct vlan_priority_tci_mapping *np;
  195. u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
  196. /* See if a priority mapping exists.. */
  197. mp = vlan->egress_priority_map[skb_prio & 0xF];
  198. while (mp) {
  199. if (mp->priority == skb_prio) {
  200. if (mp->vlan_qos && !vlan_qos)
  201. vlan->nr_egress_mappings--;
  202. else if (!mp->vlan_qos && vlan_qos)
  203. vlan->nr_egress_mappings++;
  204. mp->vlan_qos = vlan_qos;
  205. return 0;
  206. }
  207. mp = mp->next;
  208. }
  209. /* Create a new mapping then. */
  210. mp = vlan->egress_priority_map[skb_prio & 0xF];
  211. np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
  212. if (!np)
  213. return -ENOBUFS;
  214. np->next = mp;
  215. np->priority = skb_prio;
  216. np->vlan_qos = vlan_qos;
  217. vlan->egress_priority_map[skb_prio & 0xF] = np;
  218. if (vlan_qos)
  219. vlan->nr_egress_mappings++;
  220. return 0;
  221. }
  222. /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
  223. int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
  224. {
  225. struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  226. u32 old_flags = vlan->flags;
  227. if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
  228. VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
  229. return -EINVAL;
  230. vlan->flags = (old_flags & ~mask) | (flags & mask);
  231. if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
  232. if (vlan->flags & VLAN_FLAG_GVRP)
  233. vlan_gvrp_request_join(dev);
  234. else
  235. vlan_gvrp_request_leave(dev);
  236. }
  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. }
  243. return 0;
  244. }
  245. void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
  246. {
  247. strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
  248. }
  249. static int vlan_dev_open(struct net_device *dev)
  250. {
  251. struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  252. struct net_device *real_dev = vlan->real_dev;
  253. int err;
  254. if (!(real_dev->flags & IFF_UP) &&
  255. !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
  256. return -ENETDOWN;
  257. if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) {
  258. err = dev_uc_add(real_dev, dev->dev_addr);
  259. if (err < 0)
  260. goto out;
  261. }
  262. if (dev->flags & IFF_ALLMULTI) {
  263. err = dev_set_allmulti(real_dev, 1);
  264. if (err < 0)
  265. goto del_unicast;
  266. }
  267. if (dev->flags & IFF_PROMISC) {
  268. err = dev_set_promiscuity(real_dev, 1);
  269. if (err < 0)
  270. goto clear_allmulti;
  271. }
  272. memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
  273. if (vlan->flags & VLAN_FLAG_GVRP)
  274. vlan_gvrp_request_join(dev);
  275. if (vlan->flags & VLAN_FLAG_MVRP)
  276. vlan_mvrp_request_join(dev);
  277. if (netif_carrier_ok(real_dev))
  278. netif_carrier_on(dev);
  279. return 0;
  280. clear_allmulti:
  281. if (dev->flags & IFF_ALLMULTI)
  282. dev_set_allmulti(real_dev, -1);
  283. del_unicast:
  284. if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
  285. dev_uc_del(real_dev, dev->dev_addr);
  286. out:
  287. netif_carrier_off(dev);
  288. return err;
  289. }
  290. static int vlan_dev_stop(struct net_device *dev)
  291. {
  292. struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  293. struct net_device *real_dev = vlan->real_dev;
  294. dev_mc_unsync(real_dev, dev);
  295. dev_uc_unsync(real_dev, dev);
  296. if (dev->flags & IFF_ALLMULTI)
  297. dev_set_allmulti(real_dev, -1);
  298. if (dev->flags & IFF_PROMISC)
  299. dev_set_promiscuity(real_dev, -1);
  300. if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
  301. dev_uc_del(real_dev, dev->dev_addr);
  302. netif_carrier_off(dev);
  303. return 0;
  304. }
  305. static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
  306. {
  307. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  308. struct sockaddr *addr = p;
  309. int err;
  310. if (!is_valid_ether_addr(addr->sa_data))
  311. return -EADDRNOTAVAIL;
  312. if (!(dev->flags & IFF_UP))
  313. goto out;
  314. if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
  315. err = dev_uc_add(real_dev, addr->sa_data);
  316. if (err < 0)
  317. return err;
  318. }
  319. if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
  320. dev_uc_del(real_dev, dev->dev_addr);
  321. out:
  322. memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
  323. return 0;
  324. }
  325. static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
  326. {
  327. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  328. const struct net_device_ops *ops = real_dev->netdev_ops;
  329. struct ifreq ifrr;
  330. int err = -EOPNOTSUPP;
  331. strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
  332. ifrr.ifr_ifru = ifr->ifr_ifru;
  333. switch (cmd) {
  334. case SIOCGMIIPHY:
  335. case SIOCGMIIREG:
  336. case SIOCSMIIREG:
  337. if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
  338. err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
  339. break;
  340. }
  341. if (!err)
  342. ifr->ifr_ifru = ifrr.ifr_ifru;
  343. return err;
  344. }
  345. static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
  346. {
  347. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  348. const struct net_device_ops *ops = real_dev->netdev_ops;
  349. int err = 0;
  350. if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
  351. err = ops->ndo_neigh_setup(real_dev, pa);
  352. return err;
  353. }
  354. #if IS_ENABLED(CONFIG_FCOE)
  355. static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
  356. struct scatterlist *sgl, unsigned int sgc)
  357. {
  358. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  359. const struct net_device_ops *ops = real_dev->netdev_ops;
  360. int rc = 0;
  361. if (ops->ndo_fcoe_ddp_setup)
  362. rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
  363. return rc;
  364. }
  365. static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
  366. {
  367. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  368. const struct net_device_ops *ops = real_dev->netdev_ops;
  369. int len = 0;
  370. if (ops->ndo_fcoe_ddp_done)
  371. len = ops->ndo_fcoe_ddp_done(real_dev, xid);
  372. return len;
  373. }
  374. static int vlan_dev_fcoe_enable(struct net_device *dev)
  375. {
  376. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  377. const struct net_device_ops *ops = real_dev->netdev_ops;
  378. int rc = -EINVAL;
  379. if (ops->ndo_fcoe_enable)
  380. rc = ops->ndo_fcoe_enable(real_dev);
  381. return rc;
  382. }
  383. static int vlan_dev_fcoe_disable(struct net_device *dev)
  384. {
  385. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  386. const struct net_device_ops *ops = real_dev->netdev_ops;
  387. int rc = -EINVAL;
  388. if (ops->ndo_fcoe_disable)
  389. rc = ops->ndo_fcoe_disable(real_dev);
  390. return rc;
  391. }
  392. static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
  393. {
  394. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  395. const struct net_device_ops *ops = real_dev->netdev_ops;
  396. int rc = -EINVAL;
  397. if (ops->ndo_fcoe_get_wwn)
  398. rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
  399. return rc;
  400. }
  401. static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
  402. struct scatterlist *sgl, unsigned int sgc)
  403. {
  404. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  405. const struct net_device_ops *ops = real_dev->netdev_ops;
  406. int rc = 0;
  407. if (ops->ndo_fcoe_ddp_target)
  408. rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
  409. return rc;
  410. }
  411. #endif
  412. static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
  413. {
  414. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  415. if (dev->flags & IFF_UP) {
  416. if (change & IFF_ALLMULTI)
  417. dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
  418. if (change & IFF_PROMISC)
  419. dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
  420. }
  421. }
  422. static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
  423. {
  424. dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
  425. dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
  426. }
  427. /*
  428. * vlan network devices have devices nesting below it, and are a special
  429. * "super class" of normal network devices; split their locks off into a
  430. * separate class since they always nest.
  431. */
  432. static struct lock_class_key vlan_netdev_xmit_lock_key;
  433. static struct lock_class_key vlan_netdev_addr_lock_key;
  434. static void vlan_dev_set_lockdep_one(struct net_device *dev,
  435. struct netdev_queue *txq,
  436. void *_subclass)
  437. {
  438. lockdep_set_class_and_subclass(&txq->_xmit_lock,
  439. &vlan_netdev_xmit_lock_key,
  440. *(int *)_subclass);
  441. }
  442. static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
  443. {
  444. lockdep_set_class_and_subclass(&dev->addr_list_lock,
  445. &vlan_netdev_addr_lock_key,
  446. subclass);
  447. netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
  448. }
  449. static const struct header_ops vlan_header_ops = {
  450. .create = vlan_dev_hard_header,
  451. .rebuild = vlan_dev_rebuild_header,
  452. .parse = eth_header_parse,
  453. };
  454. static struct device_type vlan_type = {
  455. .name = "vlan",
  456. };
  457. static const struct net_device_ops vlan_netdev_ops;
  458. static int vlan_dev_init(struct net_device *dev)
  459. {
  460. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  461. int subclass = 0;
  462. netif_carrier_off(dev);
  463. /* IFF_BROADCAST|IFF_MULTICAST; ??? */
  464. dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
  465. IFF_MASTER | IFF_SLAVE);
  466. dev->iflink = real_dev->ifindex;
  467. dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
  468. (1<<__LINK_STATE_DORMANT))) |
  469. (1<<__LINK_STATE_PRESENT);
  470. dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG |
  471. NETIF_F_FRAGLIST | NETIF_F_ALL_TSO |
  472. NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM |
  473. NETIF_F_ALL_FCOE;
  474. dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
  475. dev->gso_max_size = real_dev->gso_max_size;
  476. /* ipv6 shared card related stuff */
  477. dev->dev_id = real_dev->dev_id;
  478. if (is_zero_ether_addr(dev->dev_addr))
  479. memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
  480. if (is_zero_ether_addr(dev->broadcast))
  481. memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
  482. #if IS_ENABLED(CONFIG_FCOE)
  483. dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
  484. #endif
  485. dev->needed_headroom = real_dev->needed_headroom;
  486. if (real_dev->features & NETIF_F_HW_VLAN_CTAG_TX) {
  487. dev->header_ops = real_dev->header_ops;
  488. dev->hard_header_len = real_dev->hard_header_len;
  489. } else {
  490. dev->header_ops = &vlan_header_ops;
  491. dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
  492. }
  493. dev->netdev_ops = &vlan_netdev_ops;
  494. SET_NETDEV_DEVTYPE(dev, &vlan_type);
  495. if (is_vlan_dev(real_dev))
  496. subclass = 1;
  497. vlan_dev_set_lockdep_class(dev, subclass);
  498. vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
  499. if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
  500. return -ENOMEM;
  501. return 0;
  502. }
  503. static void vlan_dev_uninit(struct net_device *dev)
  504. {
  505. struct vlan_priority_tci_mapping *pm;
  506. struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  507. int i;
  508. free_percpu(vlan->vlan_pcpu_stats);
  509. vlan->vlan_pcpu_stats = NULL;
  510. for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
  511. while ((pm = vlan->egress_priority_map[i]) != NULL) {
  512. vlan->egress_priority_map[i] = pm->next;
  513. kfree(pm);
  514. }
  515. }
  516. }
  517. static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
  518. netdev_features_t features)
  519. {
  520. struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
  521. netdev_features_t old_features = features;
  522. features &= real_dev->vlan_features;
  523. features |= NETIF_F_RXCSUM;
  524. features &= real_dev->features;
  525. features |= old_features & NETIF_F_SOFT_FEATURES;
  526. features |= NETIF_F_LLTX;
  527. return features;
  528. }
  529. static int vlan_ethtool_get_settings(struct net_device *dev,
  530. struct ethtool_cmd *cmd)
  531. {
  532. const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  533. return __ethtool_get_settings(vlan->real_dev, cmd);
  534. }
  535. static void vlan_ethtool_get_drvinfo(struct net_device *dev,
  536. struct ethtool_drvinfo *info)
  537. {
  538. strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
  539. strlcpy(info->version, vlan_version, sizeof(info->version));
  540. strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
  541. }
  542. static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
  543. {
  544. if (vlan_dev_priv(dev)->vlan_pcpu_stats) {
  545. struct vlan_pcpu_stats *p;
  546. u32 rx_errors = 0, tx_dropped = 0;
  547. int i;
  548. for_each_possible_cpu(i) {
  549. u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
  550. unsigned int start;
  551. p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
  552. do {
  553. start = u64_stats_fetch_begin_bh(&p->syncp);
  554. rxpackets = p->rx_packets;
  555. rxbytes = p->rx_bytes;
  556. rxmulticast = p->rx_multicast;
  557. txpackets = p->tx_packets;
  558. txbytes = p->tx_bytes;
  559. } while (u64_stats_fetch_retry_bh(&p->syncp, start));
  560. stats->rx_packets += rxpackets;
  561. stats->rx_bytes += rxbytes;
  562. stats->multicast += rxmulticast;
  563. stats->tx_packets += txpackets;
  564. stats->tx_bytes += txbytes;
  565. /* rx_errors & tx_dropped are u32 */
  566. rx_errors += p->rx_errors;
  567. tx_dropped += p->tx_dropped;
  568. }
  569. stats->rx_errors = rx_errors;
  570. stats->tx_dropped = tx_dropped;
  571. }
  572. return stats;
  573. }
  574. #ifdef CONFIG_NET_POLL_CONTROLLER
  575. static void vlan_dev_poll_controller(struct net_device *dev)
  576. {
  577. return;
  578. }
  579. static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo,
  580. gfp_t gfp)
  581. {
  582. struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  583. struct net_device *real_dev = vlan->real_dev;
  584. struct netpoll *netpoll;
  585. int err = 0;
  586. netpoll = kzalloc(sizeof(*netpoll), gfp);
  587. err = -ENOMEM;
  588. if (!netpoll)
  589. goto out;
  590. err = __netpoll_setup(netpoll, real_dev, gfp);
  591. if (err) {
  592. kfree(netpoll);
  593. goto out;
  594. }
  595. vlan->netpoll = netpoll;
  596. out:
  597. return err;
  598. }
  599. static void vlan_dev_netpoll_cleanup(struct net_device *dev)
  600. {
  601. struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
  602. struct netpoll *netpoll = vlan->netpoll;
  603. if (!netpoll)
  604. return;
  605. vlan->netpoll = NULL;
  606. __netpoll_free_async(netpoll);
  607. }
  608. #endif /* CONFIG_NET_POLL_CONTROLLER */
  609. static const struct ethtool_ops vlan_ethtool_ops = {
  610. .get_settings = vlan_ethtool_get_settings,
  611. .get_drvinfo = vlan_ethtool_get_drvinfo,
  612. .get_link = ethtool_op_get_link,
  613. };
  614. static const struct net_device_ops vlan_netdev_ops = {
  615. .ndo_change_mtu = vlan_dev_change_mtu,
  616. .ndo_init = vlan_dev_init,
  617. .ndo_uninit = vlan_dev_uninit,
  618. .ndo_open = vlan_dev_open,
  619. .ndo_stop = vlan_dev_stop,
  620. .ndo_start_xmit = vlan_dev_hard_start_xmit,
  621. .ndo_validate_addr = eth_validate_addr,
  622. .ndo_set_mac_address = vlan_dev_set_mac_address,
  623. .ndo_set_rx_mode = vlan_dev_set_rx_mode,
  624. .ndo_change_rx_flags = vlan_dev_change_rx_flags,
  625. .ndo_do_ioctl = vlan_dev_ioctl,
  626. .ndo_neigh_setup = vlan_dev_neigh_setup,
  627. .ndo_get_stats64 = vlan_dev_get_stats64,
  628. #if IS_ENABLED(CONFIG_FCOE)
  629. .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
  630. .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
  631. .ndo_fcoe_enable = vlan_dev_fcoe_enable,
  632. .ndo_fcoe_disable = vlan_dev_fcoe_disable,
  633. .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
  634. .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
  635. #endif
  636. #ifdef CONFIG_NET_POLL_CONTROLLER
  637. .ndo_poll_controller = vlan_dev_poll_controller,
  638. .ndo_netpoll_setup = vlan_dev_netpoll_setup,
  639. .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
  640. #endif
  641. .ndo_fix_features = vlan_dev_fix_features,
  642. };
  643. void vlan_setup(struct net_device *dev)
  644. {
  645. ether_setup(dev);
  646. dev->priv_flags |= IFF_802_1Q_VLAN;
  647. dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
  648. dev->tx_queue_len = 0;
  649. dev->netdev_ops = &vlan_netdev_ops;
  650. dev->destructor = free_netdev;
  651. dev->ethtool_ops = &vlan_ethtool_ops;
  652. memset(dev->broadcast, 0, ETH_ALEN);
  653. }