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1da177e4 LT |
1 | /* -*- linux-c -*- |
2 | * INET 802.1Q VLAN | |
3 | * Ethernet-type device handling. | |
4 | * | |
5 | * Authors: Ben Greear <greearb@candelatech.com> | |
ad712087 | 6 | * Please send support related email to: netdev@vger.kernel.org |
1da177e4 | 7 | * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html |
122952fc | 8 | * |
1da177e4 LT |
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. | |
122952fc | 15 | * |
1da177e4 LT |
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 | ||
afab2d29 JP |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
1da177e4 | 25 | #include <linux/module.h> |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/skbuff.h> |
28 | #include <linux/netdevice.h> | |
37dd9255 | 29 | #include <linux/net_tstamp.h> |
1da177e4 | 30 | #include <linux/etherdevice.h> |
75b8846a | 31 | #include <linux/ethtool.h> |
1da177e4 | 32 | #include <net/arp.h> |
9d547833 | 33 | #include <net/switchdev.h> |
1da177e4 LT |
34 | |
35 | #include "vlan.h" | |
36 | #include "vlanproc.h" | |
37 | #include <linux/if_vlan.h> | |
6d4cdf47 | 38 | #include <linux/netpoll.h> |
1da177e4 | 39 | |
1da177e4 | 40 | /* |
122952fc | 41 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
42 | * |
43 | * saddr=NULL means use device source address | |
44 | * daddr=NULL means leave destination address (eg unresolved arp) | |
45 | * | |
46 | * This is called when the SKB is moving down the stack towards the | |
47 | * physical devices. | |
48 | */ | |
ef3eb3e5 PM |
49 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
50 | unsigned short type, | |
51 | const void *daddr, const void *saddr, | |
52 | unsigned int len) | |
1da177e4 | 53 | { |
1fd9b1fc | 54 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 55 | struct vlan_hdr *vhdr; |
1349fe9a | 56 | unsigned int vhdrlen = 0; |
9bb8582e | 57 | u16 vlan_tci = 0; |
1349fe9a | 58 | int rc; |
1da177e4 | 59 | |
0c0667a8 | 60 | if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { |
1da177e4 LT |
61 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
62 | ||
0c0667a8 | 63 | vlan_tci = vlan->vlan_id; |
e267cb96 | 64 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
9bb8582e | 65 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
66 | |
67 | /* | |
bf9ae538 OP |
68 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
69 | * put the length in here instead. | |
1da177e4 | 70 | */ |
bf9ae538 | 71 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
1da177e4 | 72 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 73 | else |
1da177e4 | 74 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a | 75 | |
1fd9b1fc PM |
76 | skb->protocol = vlan->vlan_proto; |
77 | type = ntohs(vlan->vlan_proto); | |
1349fe9a | 78 | vhdrlen = VLAN_HLEN; |
1da177e4 LT |
79 | } |
80 | ||
81 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
82 | if (saddr == NULL) | |
83 | saddr = dev->dev_addr; | |
84 | ||
1349fe9a | 85 | /* Now make the underlying real hard header */ |
0c0667a8 | 86 | dev = vlan->real_dev; |
1349fe9a PM |
87 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
88 | if (rc > 0) | |
89 | rc += vhdrlen; | |
1da177e4 LT |
90 | return rc; |
91 | } | |
92 | ||
6eacf8ad AW |
93 | static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) |
94 | { | |
95 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
96 | if (vlan->netpoll) | |
97 | netpoll_send_skb(vlan->netpoll, skb); | |
98 | #else | |
99 | BUG(); | |
100 | #endif | |
101 | return NETDEV_TX_OK; | |
102 | } | |
103 | ||
6fef4c0c SH |
104 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
105 | struct net_device *dev) | |
1da177e4 | 106 | { |
6eacf8ad | 107 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 108 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
1a123a31 ED |
109 | unsigned int len; |
110 | int ret; | |
55b01e86 | 111 | |
1da177e4 LT |
112 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
113 | * | |
114 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
115 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
116 | */ | |
1fd9b1fc | 117 | if (veth->h_vlan_proto != vlan->vlan_proto || |
6eacf8ad | 118 | vlan->flags & VLAN_FLAG_REORDER_HDR) { |
9bb8582e | 119 | u16 vlan_tci; |
6eacf8ad | 120 | vlan_tci = vlan->vlan_id; |
e267cb96 | 121 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
b960a0ac | 122 | __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); |
1da177e4 LT |
123 | } |
124 | ||
6eacf8ad | 125 | skb->dev = vlan->real_dev; |
1a123a31 | 126 | len = skb->len; |
6eacf8ad AW |
127 | if (unlikely(netpoll_tx_running(dev))) |
128 | return vlan_netpoll_send_skb(vlan, skb); | |
129 | ||
1a123a31 ED |
130 | ret = dev_queue_xmit(skb); |
131 | ||
2d6c9ffc | 132 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
4af429d2 ED |
133 | struct vlan_pcpu_stats *stats; |
134 | ||
6eacf8ad | 135 | stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
4af429d2 ED |
136 | u64_stats_update_begin(&stats->syncp); |
137 | stats->tx_packets++; | |
138 | stats->tx_bytes += len; | |
307f73df | 139 | u64_stats_update_end(&stats->syncp); |
4af429d2 | 140 | } else { |
6eacf8ad | 141 | this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
4af429d2 | 142 | } |
1a123a31 | 143 | |
cbbef5e1 | 144 | return ret; |
1da177e4 LT |
145 | } |
146 | ||
ef3eb3e5 | 147 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
148 | { |
149 | /* TODO: gotta make sure the underlying layer can handle it, | |
150 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
151 | */ | |
7da82c06 | 152 | if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
153 | return -ERANGE; |
154 | ||
155 | dev->mtu = new_mtu; | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
c17d8874 | 160 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 161 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 162 | { |
7da82c06 | 163 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b020cb48 PM |
164 | |
165 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
166 | vlan->nr_ingress_mappings--; | |
167 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
168 | vlan->nr_ingress_mappings++; | |
169 | ||
170 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
171 | } |
172 | ||
c17d8874 | 173 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 174 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 175 | { |
7da82c06 | 176 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 LT |
177 | struct vlan_priority_tci_mapping *mp = NULL; |
178 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 179 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 180 | |
c17d8874 | 181 | /* See if a priority mapping exists.. */ |
b020cb48 | 182 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
183 | while (mp) { |
184 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
185 | if (mp->vlan_qos && !vlan_qos) |
186 | vlan->nr_egress_mappings--; | |
187 | else if (!mp->vlan_qos && vlan_qos) | |
188 | vlan->nr_egress_mappings++; | |
189 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 190 | return 0; |
1da177e4 | 191 | } |
c17d8874 | 192 | mp = mp->next; |
1da177e4 | 193 | } |
c17d8874 PM |
194 | |
195 | /* Create a new mapping then. */ | |
b020cb48 | 196 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
197 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
198 | if (!np) | |
199 | return -ENOBUFS; | |
200 | ||
201 | np->next = mp; | |
202 | np->priority = skb_prio; | |
b020cb48 | 203 | np->vlan_qos = vlan_qos; |
3e3aac49 ED |
204 | /* Before inserting this element in hash table, make sure all its fields |
205 | * are committed to memory. | |
e267cb96 | 206 | * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() |
3e3aac49 ED |
207 | */ |
208 | smp_wmb(); | |
b020cb48 PM |
209 | vlan->egress_priority_map[skb_prio & 0xF] = np; |
210 | if (vlan_qos) | |
211 | vlan->nr_egress_mappings++; | |
c17d8874 | 212 | return 0; |
1da177e4 LT |
213 | } |
214 | ||
a4bf3af4 | 215 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 216 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 217 | { |
7da82c06 | 218 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b3ce0325 PM |
219 | u32 old_flags = vlan->flags; |
220 | ||
5e756593 | 221 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
86fbe9bb | 222 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) |
b3ce0325 PM |
223 | return -EINVAL; |
224 | ||
225 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
226 | |
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); | |
230 | else | |
231 | vlan_gvrp_request_leave(dev); | |
232 | } | |
86fbe9bb DW |
233 | |
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); | |
237 | else | |
238 | vlan_mvrp_request_leave(dev); | |
239 | } | |
b3ce0325 | 240 | return 0; |
1da177e4 LT |
241 | } |
242 | ||
c17d8874 | 243 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 244 | { |
7da82c06 | 245 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
1da177e4 LT |
246 | } |
247 | ||
308453aa MM |
248 | bool vlan_dev_inherit_address(struct net_device *dev, |
249 | struct net_device *real_dev) | |
250 | { | |
251 | if (dev->addr_assign_type != NET_ADDR_STOLEN) | |
252 | return false; | |
253 | ||
254 | ether_addr_copy(dev->dev_addr, real_dev->dev_addr); | |
255 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
256 | return true; | |
257 | } | |
258 | ||
ef3eb3e5 | 259 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 260 | { |
7da82c06 | 261 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
8c979c26 PM |
262 | struct net_device *real_dev = vlan->real_dev; |
263 | int err; | |
264 | ||
5e756593 PM |
265 | if (!(real_dev->flags & IFF_UP) && |
266 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
267 | return -ENETDOWN; |
268 | ||
308453aa MM |
269 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) && |
270 | !vlan_dev_inherit_address(dev, real_dev)) { | |
a748ee24 | 271 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 272 | if (err < 0) |
89146504 | 273 | goto out; |
8c979c26 | 274 | } |
8c979c26 | 275 | |
89146504 WC |
276 | if (dev->flags & IFF_ALLMULTI) { |
277 | err = dev_set_allmulti(real_dev, 1); | |
278 | if (err < 0) | |
279 | goto del_unicast; | |
280 | } | |
281 | if (dev->flags & IFF_PROMISC) { | |
282 | err = dev_set_promiscuity(real_dev, 1); | |
283 | if (err < 0) | |
284 | goto clear_allmulti; | |
285 | } | |
286 | ||
07fc67be | 287 | ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); |
6c78dcbd | 288 | |
70c03b49 PM |
289 | if (vlan->flags & VLAN_FLAG_GVRP) |
290 | vlan_gvrp_request_join(dev); | |
291 | ||
86fbe9bb DW |
292 | if (vlan->flags & VLAN_FLAG_MVRP) |
293 | vlan_mvrp_request_join(dev); | |
294 | ||
0ac820ee PO |
295 | if (netif_carrier_ok(real_dev)) |
296 | netif_carrier_on(dev); | |
1da177e4 | 297 | return 0; |
89146504 WC |
298 | |
299 | clear_allmulti: | |
300 | if (dev->flags & IFF_ALLMULTI) | |
301 | dev_set_allmulti(real_dev, -1); | |
302 | del_unicast: | |
53a2b3a1 | 303 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 304 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 305 | out: |
adc667e8 | 306 | netif_carrier_off(dev); |
89146504 | 307 | return err; |
1da177e4 LT |
308 | } |
309 | ||
ef3eb3e5 | 310 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 311 | { |
7da82c06 | 312 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
70c03b49 PM |
313 | struct net_device *real_dev = vlan->real_dev; |
314 | ||
56addd6e | 315 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 316 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
317 | if (dev->flags & IFF_ALLMULTI) |
318 | dev_set_allmulti(real_dev, -1); | |
319 | if (dev->flags & IFF_PROMISC) | |
320 | dev_set_promiscuity(real_dev, -1); | |
321 | ||
53a2b3a1 | 322 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 323 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 324 | |
adc667e8 | 325 | netif_carrier_off(dev); |
1da177e4 LT |
326 | return 0; |
327 | } | |
328 | ||
ef3eb3e5 | 329 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 330 | { |
7da82c06 | 331 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
39aaac11 PM |
332 | struct sockaddr *addr = p; |
333 | int err; | |
334 | ||
335 | if (!is_valid_ether_addr(addr->sa_data)) | |
336 | return -EADDRNOTAVAIL; | |
337 | ||
338 | if (!(dev->flags & IFF_UP)) | |
339 | goto out; | |
340 | ||
53a2b3a1 | 341 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
a748ee24 | 342 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
343 | if (err < 0) |
344 | return err; | |
345 | } | |
346 | ||
53a2b3a1 | 347 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 348 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
349 | |
350 | out: | |
07fc67be | 351 | ether_addr_copy(dev->dev_addr, addr->sa_data); |
39aaac11 PM |
352 | return 0; |
353 | } | |
354 | ||
ef3eb3e5 | 355 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 356 | { |
7da82c06 | 357 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
656299f7 | 358 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
359 | struct ifreq ifrr; |
360 | int err = -EOPNOTSUPP; | |
361 | ||
362 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
363 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
364 | ||
2029cc2c | 365 | switch (cmd) { |
1da177e4 LT |
366 | case SIOCGMIIPHY: |
367 | case SIOCGMIIREG: | |
368 | case SIOCSMIIREG: | |
a6111d3c SS |
369 | case SIOCSHWTSTAMP: |
370 | case SIOCGHWTSTAMP: | |
656299f7 SH |
371 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
372 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 373 | break; |
1da177e4 LT |
374 | } |
375 | ||
122952fc | 376 | if (!err) |
1da177e4 LT |
377 | ifr->ifr_ifru = ifrr.ifr_ifru; |
378 | ||
379 | return err; | |
380 | } | |
381 | ||
cc883d16 FB |
382 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
383 | { | |
7da82c06 | 384 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
cc883d16 FB |
385 | const struct net_device_ops *ops = real_dev->netdev_ops; |
386 | int err = 0; | |
387 | ||
388 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 389 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
390 | |
391 | return err; | |
392 | } | |
393 | ||
f4d5392e | 394 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
395 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
396 | struct scatterlist *sgl, unsigned int sgc) | |
397 | { | |
7da82c06 | 398 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
399 | const struct net_device_ops *ops = real_dev->netdev_ops; |
400 | int rc = 0; | |
401 | ||
402 | if (ops->ndo_fcoe_ddp_setup) | |
403 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
404 | ||
405 | return rc; | |
406 | } | |
407 | ||
408 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
409 | { | |
7da82c06 | 410 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
411 | const struct net_device_ops *ops = real_dev->netdev_ops; |
412 | int len = 0; | |
413 | ||
414 | if (ops->ndo_fcoe_ddp_done) | |
415 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
416 | ||
417 | return len; | |
418 | } | |
0af46d99 YZ |
419 | |
420 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
421 | { | |
7da82c06 | 422 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
423 | const struct net_device_ops *ops = real_dev->netdev_ops; |
424 | int rc = -EINVAL; | |
425 | ||
426 | if (ops->ndo_fcoe_enable) | |
427 | rc = ops->ndo_fcoe_enable(real_dev); | |
428 | return rc; | |
429 | } | |
430 | ||
431 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
432 | { | |
7da82c06 | 433 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
434 | const struct net_device_ops *ops = real_dev->netdev_ops; |
435 | int rc = -EINVAL; | |
436 | ||
437 | if (ops->ndo_fcoe_disable) | |
438 | rc = ops->ndo_fcoe_disable(real_dev); | |
439 | return rc; | |
440 | } | |
d6534799 YZ |
441 | |
442 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
443 | { | |
7da82c06 | 444 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
d6534799 YZ |
445 | const struct net_device_ops *ops = real_dev->netdev_ops; |
446 | int rc = -EINVAL; | |
447 | ||
448 | if (ops->ndo_fcoe_get_wwn) | |
449 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); | |
450 | return rc; | |
451 | } | |
4ea09c9c YZ |
452 | |
453 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, | |
454 | struct scatterlist *sgl, unsigned int sgc) | |
455 | { | |
7da82c06 | 456 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
4ea09c9c YZ |
457 | const struct net_device_ops *ops = real_dev->netdev_ops; |
458 | int rc = 0; | |
459 | ||
460 | if (ops->ndo_fcoe_ddp_target) | |
461 | rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); | |
462 | ||
463 | return rc; | |
464 | } | |
b85daa53 VD |
465 | #endif |
466 | ||
ef3eb3e5 | 467 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 468 | { |
7da82c06 | 469 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
6c78dcbd | 470 | |
deede2fa MK |
471 | if (dev->flags & IFF_UP) { |
472 | if (change & IFF_ALLMULTI) | |
473 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
474 | if (change & IFF_PROMISC) | |
475 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
476 | } | |
6c78dcbd PM |
477 | } |
478 | ||
e83a2ea8 | 479 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 480 | { |
d38569ab VY |
481 | dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
482 | dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); | |
1da177e4 | 483 | } |
ef3eb3e5 PM |
484 | |
485 | /* | |
486 | * vlan network devices have devices nesting below it, and are a special | |
487 | * "super class" of normal network devices; split their locks off into a | |
488 | * separate class since they always nest. | |
489 | */ | |
490 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 491 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 492 | |
e8a0464c DM |
493 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
494 | struct netdev_queue *txq, | |
495 | void *_subclass) | |
c773e847 DM |
496 | { |
497 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
498 | &vlan_netdev_xmit_lock_key, |
499 | *(int *)_subclass); | |
c773e847 DM |
500 | } |
501 | ||
502 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
503 | { | |
cf508b12 DM |
504 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
505 | &vlan_netdev_addr_lock_key, | |
506 | subclass); | |
e8a0464c | 507 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
508 | } |
509 | ||
d38569ab VY |
510 | static int vlan_dev_get_lock_subclass(struct net_device *dev) |
511 | { | |
512 | return vlan_dev_priv(dev)->nest_level; | |
513 | } | |
514 | ||
ef3eb3e5 PM |
515 | static const struct header_ops vlan_header_ops = { |
516 | .create = vlan_dev_hard_header, | |
ef3eb3e5 PM |
517 | .parse = eth_header_parse, |
518 | }; | |
519 | ||
2205369a DM |
520 | static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, |
521 | unsigned short type, | |
522 | const void *daddr, const void *saddr, | |
523 | unsigned int len) | |
524 | { | |
525 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
526 | struct net_device *real_dev = vlan->real_dev; | |
527 | ||
dd38743b PB |
528 | if (saddr == NULL) |
529 | saddr = dev->dev_addr; | |
530 | ||
2205369a DM |
531 | return dev_hard_header(skb, real_dev, type, daddr, saddr, len); |
532 | } | |
533 | ||
534 | static const struct header_ops vlan_passthru_header_ops = { | |
535 | .create = vlan_passthru_hard_header, | |
2205369a DM |
536 | .parse = eth_header_parse, |
537 | }; | |
538 | ||
e949b09b DG |
539 | static struct device_type vlan_type = { |
540 | .name = "vlan", | |
541 | }; | |
542 | ||
213b15ca | 543 | static const struct net_device_ops vlan_netdev_ops; |
f7d1b9f5 | 544 | |
ef3eb3e5 PM |
545 | static int vlan_dev_init(struct net_device *dev) |
546 | { | |
7da82c06 | 547 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
ef3eb3e5 | 548 | |
adc667e8 JV |
549 | netif_carrier_off(dev); |
550 | ||
ef3eb3e5 | 551 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
194dbcc8 JF |
552 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
553 | IFF_MASTER | IFF_SLAVE); | |
ef3eb3e5 PM |
554 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | |
555 | (1<<__LINK_STATE_DORMANT))) | | |
556 | (1<<__LINK_STATE_PRESENT); | |
557 | ||
a188222b | 558 | dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | |
53f6b708 | 559 | NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | |
53692b1d | 560 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC | |
62f2a3a4 MM |
561 | NETIF_F_ALL_FCOE; |
562 | ||
53f6b708 TM |
563 | dev->features |= real_dev->vlan_features | NETIF_F_LLTX | |
564 | NETIF_F_GSO_SOFTWARE; | |
1ae4be22 | 565 | dev->gso_max_size = real_dev->gso_max_size; |
f6773c5e | 566 | dev->gso_max_segs = real_dev->gso_max_segs; |
2adb956b VY |
567 | if (dev->features & NETIF_F_VLAN_FEATURES) |
568 | netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); | |
569 | ||
8d463504 | 570 | dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; |
5fb13570 | 571 | |
ef3eb3e5 PM |
572 | /* ipv6 shared card related stuff */ |
573 | dev->dev_id = real_dev->dev_id; | |
574 | ||
308453aa MM |
575 | if (is_zero_ether_addr(dev->dev_addr)) { |
576 | ether_addr_copy(dev->dev_addr, real_dev->dev_addr); | |
577 | dev->addr_assign_type = NET_ADDR_STOLEN; | |
578 | } | |
ef3eb3e5 PM |
579 | if (is_zero_ether_addr(dev->broadcast)) |
580 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
581 | ||
f4d5392e | 582 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
583 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
584 | #endif | |
585 | ||
d870bfb9 | 586 | dev->needed_headroom = real_dev->needed_headroom; |
fc0d48b8 VY |
587 | if (vlan_hw_offload_capable(real_dev->features, |
588 | vlan_dev_priv(dev)->vlan_proto)) { | |
2205369a | 589 | dev->header_ops = &vlan_passthru_header_ops; |
ef3eb3e5 | 590 | dev->hard_header_len = real_dev->hard_header_len; |
ef3eb3e5 PM |
591 | } else { |
592 | dev->header_ops = &vlan_header_ops; | |
593 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
ef3eb3e5 PM |
594 | } |
595 | ||
213b15ca | 596 | dev->netdev_ops = &vlan_netdev_ops; |
636e19a3 | 597 | |
e949b09b DG |
598 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
599 | ||
d38569ab | 600 | vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); |
9793241f | 601 | |
1c213bd2 | 602 | vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
7da82c06 | 603 | if (!vlan_dev_priv(dev)->vlan_pcpu_stats) |
9793241f ED |
604 | return -ENOMEM; |
605 | ||
ef3eb3e5 PM |
606 | return 0; |
607 | } | |
608 | ||
23556323 PE |
609 | static void vlan_dev_uninit(struct net_device *dev) |
610 | { | |
611 | struct vlan_priority_tci_mapping *pm; | |
7da82c06 | 612 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
23556323 PE |
613 | int i; |
614 | ||
615 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { | |
616 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
617 | vlan->egress_priority_map[i] = pm->next; | |
618 | kfree(pm); | |
619 | } | |
620 | } | |
621 | } | |
622 | ||
c8f44aff MM |
623 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
624 | netdev_features_t features) | |
8a0427bb | 625 | { |
7da82c06 | 626 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b29d3145 | 627 | netdev_features_t old_features = features; |
8a0427bb | 628 | |
da08143b | 629 | features = netdev_intersect_features(features, real_dev->vlan_features); |
bc5787c6 | 630 | features |= NETIF_F_RXCSUM; |
da08143b | 631 | features = netdev_intersect_features(features, real_dev->features); |
712ae51a | 632 | |
53f6b708 | 633 | features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); |
f0a619cc | 634 | features |= NETIF_F_LLTX; |
8a0427bb MM |
635 | |
636 | return features; | |
637 | } | |
638 | ||
57709798 DD |
639 | static int vlan_ethtool_get_link_ksettings(struct net_device *dev, |
640 | struct ethtool_link_ksettings *cmd) | |
b3020061 | 641 | { |
7da82c06 | 642 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
4bc71cb9 | 643 | |
57709798 | 644 | return __ethtool_get_link_ksettings(vlan->real_dev, cmd); |
b3020061 SH |
645 | } |
646 | ||
647 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
648 | struct ethtool_drvinfo *info) | |
649 | { | |
7826d43f JP |
650 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
651 | strlcpy(info->version, vlan_version, sizeof(info->version)); | |
652 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
b3020061 SH |
653 | } |
654 | ||
37dd9255 RC |
655 | static int vlan_ethtool_get_ts_info(struct net_device *dev, |
656 | struct ethtool_ts_info *info) | |
657 | { | |
658 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
659 | const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; | |
660 | ||
661 | if (ops->get_ts_info) { | |
662 | return ops->get_ts_info(vlan->real_dev, info); | |
663 | } else { | |
664 | info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | | |
665 | SOF_TIMESTAMPING_SOFTWARE; | |
666 | info->phc_index = -1; | |
667 | } | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
28172739 | 672 | static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
9793241f | 673 | { |
5a4ae5f6 LR |
674 | struct vlan_pcpu_stats *p; |
675 | u32 rx_errors = 0, tx_dropped = 0; | |
676 | int i; | |
9793241f | 677 | |
5a4ae5f6 LR |
678 | for_each_possible_cpu(i) { |
679 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; | |
680 | unsigned int start; | |
681 | ||
682 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); | |
683 | do { | |
684 | start = u64_stats_fetch_begin_irq(&p->syncp); | |
685 | rxpackets = p->rx_packets; | |
686 | rxbytes = p->rx_bytes; | |
687 | rxmulticast = p->rx_multicast; | |
688 | txpackets = p->tx_packets; | |
689 | txbytes = p->tx_bytes; | |
690 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); | |
691 | ||
692 | stats->rx_packets += rxpackets; | |
693 | stats->rx_bytes += rxbytes; | |
694 | stats->multicast += rxmulticast; | |
695 | stats->tx_packets += txpackets; | |
696 | stats->tx_bytes += txbytes; | |
697 | /* rx_errors & tx_dropped are u32 */ | |
698 | rx_errors += p->rx_errors; | |
699 | tx_dropped += p->tx_dropped; | |
9793241f | 700 | } |
5a4ae5f6 LR |
701 | stats->rx_errors = rx_errors; |
702 | stats->tx_dropped = tx_dropped; | |
703 | ||
9793241f ED |
704 | return stats; |
705 | } | |
706 | ||
6d4cdf47 | 707 | #ifdef CONFIG_NET_POLL_CONTROLLER |
de93cb2e | 708 | static void vlan_dev_poll_controller(struct net_device *dev) |
6d4cdf47 BL |
709 | { |
710 | return; | |
711 | } | |
712 | ||
a8779ec1 | 713 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) |
6d4cdf47 | 714 | { |
f3da3893 AW |
715 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
716 | struct net_device *real_dev = vlan->real_dev; | |
6d4cdf47 BL |
717 | struct netpoll *netpoll; |
718 | int err = 0; | |
719 | ||
a8779ec1 | 720 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); |
6d4cdf47 BL |
721 | err = -ENOMEM; |
722 | if (!netpoll) | |
723 | goto out; | |
724 | ||
a8779ec1 | 725 | err = __netpoll_setup(netpoll, real_dev); |
6d4cdf47 BL |
726 | if (err) { |
727 | kfree(netpoll); | |
728 | goto out; | |
729 | } | |
730 | ||
f3da3893 | 731 | vlan->netpoll = netpoll; |
6d4cdf47 BL |
732 | |
733 | out: | |
734 | return err; | |
735 | } | |
736 | ||
de93cb2e | 737 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
6d4cdf47 | 738 | { |
f3da3893 AW |
739 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
740 | struct netpoll *netpoll = vlan->netpoll; | |
6d4cdf47 BL |
741 | |
742 | if (!netpoll) | |
743 | return; | |
744 | ||
f3da3893 | 745 | vlan->netpoll = NULL; |
6d4cdf47 | 746 | |
2cde6acd | 747 | __netpoll_free_async(netpoll); |
6d4cdf47 BL |
748 | } |
749 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
750 | ||
2dbf6b50 ND |
751 | static int vlan_dev_get_iflink(const struct net_device *dev) |
752 | { | |
753 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; | |
754 | ||
755 | return real_dev->ifindex; | |
756 | } | |
757 | ||
75b8846a | 758 | static const struct ethtool_ops vlan_ethtool_ops = { |
57709798 | 759 | .get_link_ksettings = vlan_ethtool_get_link_ksettings, |
b3020061 | 760 | .get_drvinfo = vlan_ethtool_get_drvinfo, |
75b8846a | 761 | .get_link = ethtool_op_get_link, |
37dd9255 | 762 | .get_ts_info = vlan_ethtool_get_ts_info, |
75b8846a PM |
763 | }; |
764 | ||
656299f7 SH |
765 | static const struct net_device_ops vlan_netdev_ops = { |
766 | .ndo_change_mtu = vlan_dev_change_mtu, | |
767 | .ndo_init = vlan_dev_init, | |
768 | .ndo_uninit = vlan_dev_uninit, | |
769 | .ndo_open = vlan_dev_open, | |
770 | .ndo_stop = vlan_dev_stop, | |
669d3e0b VD |
771 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
772 | .ndo_validate_addr = eth_validate_addr, | |
773 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
774 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
669d3e0b VD |
775 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
776 | .ndo_do_ioctl = vlan_dev_ioctl, | |
777 | .ndo_neigh_setup = vlan_dev_neigh_setup, | |
9618e2ff | 778 | .ndo_get_stats64 = vlan_dev_get_stats64, |
f4d5392e | 779 | #if IS_ENABLED(CONFIG_FCOE) |
669d3e0b VD |
780 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
781 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
782 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, | |
783 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
784 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, | |
4ea09c9c | 785 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
6d4cdf47 BL |
786 | #endif |
787 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
788 | .ndo_poll_controller = vlan_dev_poll_controller, | |
789 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, | |
790 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, | |
669d3e0b | 791 | #endif |
8a0427bb | 792 | .ndo_fix_features = vlan_dev_fix_features, |
9d547833 IS |
793 | .ndo_fdb_add = switchdev_port_fdb_add, |
794 | .ndo_fdb_del = switchdev_port_fdb_del, | |
795 | .ndo_fdb_dump = switchdev_port_fdb_dump, | |
796 | .ndo_bridge_setlink = switchdev_port_bridge_setlink, | |
797 | .ndo_bridge_getlink = switchdev_port_bridge_getlink, | |
798 | .ndo_bridge_dellink = switchdev_port_bridge_dellink, | |
d38569ab | 799 | .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, |
2dbf6b50 | 800 | .ndo_get_iflink = vlan_dev_get_iflink, |
669d3e0b VD |
801 | }; |
802 | ||
a48e5faf ED |
803 | static void vlan_dev_free(struct net_device *dev) |
804 | { | |
805 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
806 | ||
807 | free_percpu(vlan->vlan_pcpu_stats); | |
808 | vlan->vlan_pcpu_stats = NULL; | |
809 | free_netdev(dev); | |
810 | } | |
811 | ||
ef3eb3e5 PM |
812 | void vlan_setup(struct net_device *dev) |
813 | { | |
814 | ether_setup(dev); | |
815 | ||
2e659c05 | 816 | dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE; |
e817af27 | 817 | dev->priv_flags |= IFF_UNICAST_FLT; |
02875878 ED |
818 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
819 | netif_keep_dst(dev); | |
ef3eb3e5 | 820 | |
656299f7 | 821 | dev->netdev_ops = &vlan_netdev_ops; |
a48e5faf | 822 | dev->destructor = vlan_dev_free; |
75b8846a | 823 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 | 824 | |
423049ab | 825 | eth_zero_addr(dev->broadcast); |
ef3eb3e5 | 826 | } |