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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> |
863d8bc9 | 32 | #include <linux/phy.h> |
1da177e4 | 33 | #include <net/arp.h> |
9d547833 | 34 | #include <net/switchdev.h> |
1da177e4 LT |
35 | |
36 | #include "vlan.h" | |
37 | #include "vlanproc.h" | |
38 | #include <linux/if_vlan.h> | |
6d4cdf47 | 39 | #include <linux/netpoll.h> |
1da177e4 | 40 | |
1da177e4 | 41 | /* |
122952fc | 42 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
43 | * |
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 | */ | |
ef3eb3e5 PM |
50 | static 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) | |
1da177e4 | 54 | { |
1fd9b1fc | 55 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 56 | struct vlan_hdr *vhdr; |
1349fe9a | 57 | unsigned int vhdrlen = 0; |
9bb8582e | 58 | u16 vlan_tci = 0; |
1349fe9a | 59 | int rc; |
1da177e4 | 60 | |
0c0667a8 | 61 | if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { |
d58ff351 | 62 | vhdr = skb_push(skb, VLAN_HLEN); |
1da177e4 | 63 | |
0c0667a8 | 64 | vlan_tci = vlan->vlan_id; |
e267cb96 | 65 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
9bb8582e | 66 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
67 | |
68 | /* | |
bf9ae538 OP |
69 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
70 | * put the length in here instead. | |
1da177e4 | 71 | */ |
bf9ae538 | 72 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
1da177e4 | 73 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 74 | else |
1da177e4 | 75 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a | 76 | |
1fd9b1fc PM |
77 | skb->protocol = vlan->vlan_proto; |
78 | type = ntohs(vlan->vlan_proto); | |
1349fe9a | 79 | vhdrlen = VLAN_HLEN; |
1da177e4 LT |
80 | } |
81 | ||
82 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
83 | if (saddr == NULL) | |
84 | saddr = dev->dev_addr; | |
85 | ||
1349fe9a | 86 | /* Now make the underlying real hard header */ |
0c0667a8 | 87 | dev = vlan->real_dev; |
1349fe9a PM |
88 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
89 | if (rc > 0) | |
90 | rc += vhdrlen; | |
1da177e4 LT |
91 | return rc; |
92 | } | |
93 | ||
6eacf8ad AW |
94 | static 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 | ||
6fef4c0c SH |
105 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
106 | struct net_device *dev) | |
1da177e4 | 107 | { |
6eacf8ad | 108 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 109 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
1a123a31 ED |
110 | unsigned int len; |
111 | int ret; | |
55b01e86 | 112 | |
1da177e4 LT |
113 | /* 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 | */ | |
1fd9b1fc | 118 | if (veth->h_vlan_proto != vlan->vlan_proto || |
6eacf8ad | 119 | vlan->flags & VLAN_FLAG_REORDER_HDR) { |
9bb8582e | 120 | u16 vlan_tci; |
6eacf8ad | 121 | vlan_tci = vlan->vlan_id; |
e267cb96 | 122 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
b960a0ac | 123 | __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); |
1da177e4 LT |
124 | } |
125 | ||
6eacf8ad | 126 | skb->dev = vlan->real_dev; |
1a123a31 | 127 | len = skb->len; |
6eacf8ad AW |
128 | if (unlikely(netpoll_tx_running(dev))) |
129 | return vlan_netpoll_send_skb(vlan, skb); | |
130 | ||
1a123a31 ED |
131 | ret = dev_queue_xmit(skb); |
132 | ||
2d6c9ffc | 133 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
4af429d2 ED |
134 | struct vlan_pcpu_stats *stats; |
135 | ||
6eacf8ad | 136 | stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
4af429d2 ED |
137 | u64_stats_update_begin(&stats->syncp); |
138 | stats->tx_packets++; | |
139 | stats->tx_bytes += len; | |
307f73df | 140 | u64_stats_update_end(&stats->syncp); |
4af429d2 | 141 | } else { |
6eacf8ad | 142 | this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
4af429d2 | 143 | } |
1a123a31 | 144 | |
cbbef5e1 | 145 | return ret; |
1da177e4 LT |
146 | } |
147 | ||
ef3eb3e5 | 148 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 | 149 | { |
18d3df3e PA |
150 | 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) | |
1da177e4 LT |
156 | return -ERANGE; |
157 | ||
158 | dev->mtu = new_mtu; | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
c17d8874 | 163 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 164 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 165 | { |
7da82c06 | 166 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b020cb48 PM |
167 | |
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; | |
1da177e4 LT |
174 | } |
175 | ||
c17d8874 | 176 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 177 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 178 | { |
7da82c06 | 179 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 LT |
180 | struct vlan_priority_tci_mapping *mp = NULL; |
181 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 182 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 183 | |
c17d8874 | 184 | /* See if a priority mapping exists.. */ |
b020cb48 | 185 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
186 | while (mp) { |
187 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
188 | 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; | |
c17d8874 | 193 | return 0; |
1da177e4 | 194 | } |
c17d8874 | 195 | mp = mp->next; |
1da177e4 | 196 | } |
c17d8874 PM |
197 | |
198 | /* Create a new mapping then. */ | |
b020cb48 | 199 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
200 | 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; | |
b020cb48 | 206 | np->vlan_qos = vlan_qos; |
3e3aac49 ED |
207 | /* Before inserting this element in hash table, make sure all its fields |
208 | * are committed to memory. | |
e267cb96 | 209 | * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() |
3e3aac49 ED |
210 | */ |
211 | smp_wmb(); | |
b020cb48 PM |
212 | vlan->egress_priority_map[skb_prio & 0xF] = np; |
213 | if (vlan_qos) | |
214 | vlan->nr_egress_mappings++; | |
c17d8874 | 215 | return 0; |
1da177e4 LT |
216 | } |
217 | ||
a4bf3af4 | 218 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 219 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 220 | { |
7da82c06 | 221 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b3ce0325 PM |
222 | u32 old_flags = vlan->flags; |
223 | ||
5e756593 | 224 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
86fbe9bb | 225 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) |
b3ce0325 PM |
226 | return -EINVAL; |
227 | ||
228 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
229 | |
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 | } | |
86fbe9bb DW |
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 | } | |
b3ce0325 | 243 | return 0; |
1da177e4 LT |
244 | } |
245 | ||
c17d8874 | 246 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 247 | { |
7da82c06 | 248 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
1da177e4 LT |
249 | } |
250 | ||
308453aa MM |
251 | bool 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 | ||
ef3eb3e5 | 262 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 263 | { |
7da82c06 | 264 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
8c979c26 PM |
265 | struct net_device *real_dev = vlan->real_dev; |
266 | int err; | |
267 | ||
5e756593 PM |
268 | if (!(real_dev->flags & IFF_UP) && |
269 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
270 | return -ENETDOWN; |
271 | ||
308453aa MM |
272 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) && |
273 | !vlan_dev_inherit_address(dev, real_dev)) { | |
a748ee24 | 274 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 275 | if (err < 0) |
89146504 | 276 | goto out; |
8c979c26 | 277 | } |
8c979c26 | 278 | |
89146504 WC |
279 | 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 | ||
07fc67be | 290 | ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); |
6c78dcbd | 291 | |
70c03b49 PM |
292 | if (vlan->flags & VLAN_FLAG_GVRP) |
293 | vlan_gvrp_request_join(dev); | |
294 | ||
86fbe9bb DW |
295 | if (vlan->flags & VLAN_FLAG_MVRP) |
296 | vlan_mvrp_request_join(dev); | |
297 | ||
0ac820ee PO |
298 | if (netif_carrier_ok(real_dev)) |
299 | netif_carrier_on(dev); | |
1da177e4 | 300 | return 0; |
89146504 WC |
301 | |
302 | clear_allmulti: | |
303 | if (dev->flags & IFF_ALLMULTI) | |
304 | dev_set_allmulti(real_dev, -1); | |
305 | del_unicast: | |
53a2b3a1 | 306 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 307 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 308 | out: |
adc667e8 | 309 | netif_carrier_off(dev); |
89146504 | 310 | return err; |
1da177e4 LT |
311 | } |
312 | ||
ef3eb3e5 | 313 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 314 | { |
7da82c06 | 315 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
70c03b49 PM |
316 | struct net_device *real_dev = vlan->real_dev; |
317 | ||
56addd6e | 318 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 319 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
320 | 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 | ||
53a2b3a1 | 325 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 326 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 327 | |
adc667e8 | 328 | netif_carrier_off(dev); |
1da177e4 LT |
329 | return 0; |
330 | } | |
331 | ||
ef3eb3e5 | 332 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 333 | { |
7da82c06 | 334 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
39aaac11 PM |
335 | 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 | ||
53a2b3a1 | 344 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
a748ee24 | 345 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
346 | if (err < 0) |
347 | return err; | |
348 | } | |
349 | ||
53a2b3a1 | 350 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 351 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
352 | |
353 | out: | |
07fc67be | 354 | ether_addr_copy(dev->dev_addr, addr->sa_data); |
39aaac11 PM |
355 | return 0; |
356 | } | |
357 | ||
ef3eb3e5 | 358 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 359 | { |
7da82c06 | 360 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
656299f7 | 361 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
362 | 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 | ||
2029cc2c | 368 | switch (cmd) { |
1da177e4 LT |
369 | case SIOCGMIIPHY: |
370 | case SIOCGMIIREG: | |
371 | case SIOCSMIIREG: | |
a6111d3c SS |
372 | case SIOCSHWTSTAMP: |
373 | case SIOCGHWTSTAMP: | |
656299f7 SH |
374 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
375 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 376 | break; |
1da177e4 LT |
377 | } |
378 | ||
122952fc | 379 | if (!err) |
1da177e4 LT |
380 | ifr->ifr_ifru = ifrr.ifr_ifru; |
381 | ||
382 | return err; | |
383 | } | |
384 | ||
cc883d16 FB |
385 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
386 | { | |
7da82c06 | 387 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
cc883d16 FB |
388 | 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) | |
9d40bbda | 392 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
393 | |
394 | return err; | |
395 | } | |
396 | ||
f4d5392e | 397 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
398 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
399 | struct scatterlist *sgl, unsigned int sgc) | |
400 | { | |
7da82c06 | 401 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
402 | 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 | ||
411 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
412 | { | |
7da82c06 | 413 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
414 | 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 | } | |
0af46d99 YZ |
422 | |
423 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
424 | { | |
7da82c06 | 425 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
426 | 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 | ||
434 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
435 | { | |
7da82c06 | 436 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
437 | 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 | } | |
d6534799 YZ |
444 | |
445 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
446 | { | |
7da82c06 | 447 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
d6534799 YZ |
448 | 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 | } | |
4ea09c9c YZ |
455 | |
456 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, | |
457 | struct scatterlist *sgl, unsigned int sgc) | |
458 | { | |
7da82c06 | 459 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
4ea09c9c YZ |
460 | 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 | } | |
b85daa53 VD |
468 | #endif |
469 | ||
ef3eb3e5 | 470 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 471 | { |
7da82c06 | 472 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
6c78dcbd | 473 | |
deede2fa MK |
474 | 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 | } | |
6c78dcbd PM |
480 | } |
481 | ||
e83a2ea8 | 482 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 483 | { |
d38569ab VY |
484 | 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); | |
1da177e4 | 486 | } |
ef3eb3e5 PM |
487 | |
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 | */ | |
493 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 494 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 495 | |
e8a0464c DM |
496 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
497 | struct netdev_queue *txq, | |
498 | void *_subclass) | |
c773e847 DM |
499 | { |
500 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
501 | &vlan_netdev_xmit_lock_key, |
502 | *(int *)_subclass); | |
c773e847 DM |
503 | } |
504 | ||
505 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
506 | { | |
cf508b12 DM |
507 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
508 | &vlan_netdev_addr_lock_key, | |
509 | subclass); | |
e8a0464c | 510 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
511 | } |
512 | ||
d38569ab VY |
513 | static int vlan_dev_get_lock_subclass(struct net_device *dev) |
514 | { | |
515 | return vlan_dev_priv(dev)->nest_level; | |
516 | } | |
517 | ||
ef3eb3e5 PM |
518 | static const struct header_ops vlan_header_ops = { |
519 | .create = vlan_dev_hard_header, | |
ef3eb3e5 PM |
520 | .parse = eth_header_parse, |
521 | }; | |
522 | ||
2205369a DM |
523 | static 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 | ||
dd38743b PB |
531 | if (saddr == NULL) |
532 | saddr = dev->dev_addr; | |
533 | ||
2205369a DM |
534 | return dev_hard_header(skb, real_dev, type, daddr, saddr, len); |
535 | } | |
536 | ||
537 | static const struct header_ops vlan_passthru_header_ops = { | |
538 | .create = vlan_passthru_hard_header, | |
2205369a DM |
539 | .parse = eth_header_parse, |
540 | }; | |
541 | ||
e949b09b DG |
542 | static struct device_type vlan_type = { |
543 | .name = "vlan", | |
544 | }; | |
545 | ||
213b15ca | 546 | static const struct net_device_ops vlan_netdev_ops; |
f7d1b9f5 | 547 | |
ef3eb3e5 PM |
548 | static int vlan_dev_init(struct net_device *dev) |
549 | { | |
7da82c06 | 550 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
ef3eb3e5 | 551 | |
adc667e8 JV |
552 | netif_carrier_off(dev); |
553 | ||
ef3eb3e5 | 554 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
194dbcc8 JF |
555 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
556 | IFF_MASTER | IFF_SLAVE); | |
ef3eb3e5 PM |
557 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | |
558 | (1<<__LINK_STATE_DORMANT))) | | |
559 | (1<<__LINK_STATE_PRESENT); | |
560 | ||
a188222b | 561 | dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | |
53f6b708 | 562 | NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | |
53692b1d | 563 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC | |
62f2a3a4 MM |
564 | NETIF_F_ALL_FCOE; |
565 | ||
88997e42 | 566 | dev->features |= dev->hw_features | NETIF_F_LLTX; |
1ae4be22 | 567 | dev->gso_max_size = real_dev->gso_max_size; |
f6773c5e | 568 | dev->gso_max_segs = real_dev->gso_max_segs; |
2adb956b VY |
569 | 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 | ||
8d463504 | 572 | dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; |
5fb13570 | 573 | |
ef3eb3e5 PM |
574 | /* ipv6 shared card related stuff */ |
575 | dev->dev_id = real_dev->dev_id; | |
576 | ||
308453aa MM |
577 | 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 | } | |
ef3eb3e5 PM |
581 | if (is_zero_ether_addr(dev->broadcast)) |
582 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
583 | ||
f4d5392e | 584 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
585 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
586 | #endif | |
587 | ||
d870bfb9 | 588 | dev->needed_headroom = real_dev->needed_headroom; |
fc0d48b8 VY |
589 | if (vlan_hw_offload_capable(real_dev->features, |
590 | vlan_dev_priv(dev)->vlan_proto)) { | |
2205369a | 591 | dev->header_ops = &vlan_passthru_header_ops; |
ef3eb3e5 | 592 | dev->hard_header_len = real_dev->hard_header_len; |
ef3eb3e5 PM |
593 | } else { |
594 | dev->header_ops = &vlan_header_ops; | |
595 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
ef3eb3e5 PM |
596 | } |
597 | ||
213b15ca | 598 | dev->netdev_ops = &vlan_netdev_ops; |
636e19a3 | 599 | |
e949b09b DG |
600 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
601 | ||
d38569ab | 602 | vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); |
9793241f | 603 | |
1c213bd2 | 604 | vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
7da82c06 | 605 | if (!vlan_dev_priv(dev)->vlan_pcpu_stats) |
9793241f ED |
606 | return -ENOMEM; |
607 | ||
ef3eb3e5 PM |
608 | return 0; |
609 | } | |
610 | ||
23556323 PE |
611 | static void vlan_dev_uninit(struct net_device *dev) |
612 | { | |
613 | struct vlan_priority_tci_mapping *pm; | |
7da82c06 | 614 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
23556323 PE |
615 | 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 | ||
c8f44aff MM |
625 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
626 | netdev_features_t features) | |
8a0427bb | 627 | { |
7da82c06 | 628 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b29d3145 | 629 | netdev_features_t old_features = features; |
8403debe | 630 | netdev_features_t lower_features; |
8a0427bb | 631 | |
8403debe VY |
632 | lower_features = netdev_intersect_features((real_dev->vlan_features | |
633 | NETIF_F_RXCSUM), | |
634 | real_dev->features); | |
712ae51a | 635 | |
8403debe VY |
636 | /* Add HW_CSUM setting to preserve user ability to control |
637 | * checksum offload on the vlan device. | |
638 | */ | |
639 | if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)) | |
640 | lower_features |= NETIF_F_HW_CSUM; | |
641 | features = netdev_intersect_features(features, lower_features); | |
53f6b708 | 642 | features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); |
f0a619cc | 643 | features |= NETIF_F_LLTX; |
8a0427bb MM |
644 | |
645 | return features; | |
646 | } | |
647 | ||
57709798 DD |
648 | static int vlan_ethtool_get_link_ksettings(struct net_device *dev, |
649 | struct ethtool_link_ksettings *cmd) | |
b3020061 | 650 | { |
7da82c06 | 651 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
4bc71cb9 | 652 | |
57709798 | 653 | return __ethtool_get_link_ksettings(vlan->real_dev, cmd); |
b3020061 SH |
654 | } |
655 | ||
656 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
657 | struct ethtool_drvinfo *info) | |
658 | { | |
7826d43f JP |
659 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
660 | strlcpy(info->version, vlan_version, sizeof(info->version)); | |
661 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
b3020061 SH |
662 | } |
663 | ||
37dd9255 RC |
664 | static int vlan_ethtool_get_ts_info(struct net_device *dev, |
665 | struct ethtool_ts_info *info) | |
666 | { | |
667 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
668 | const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; | |
863d8bc9 | 669 | struct phy_device *phydev = vlan->real_dev->phydev; |
37dd9255 | 670 | |
863d8bc9 HL |
671 | if (phydev && phydev->drv && phydev->drv->ts_info) { |
672 | return phydev->drv->ts_info(phydev, info); | |
673 | } else if (ops->get_ts_info) { | |
37dd9255 RC |
674 | return ops->get_ts_info(vlan->real_dev, info); |
675 | } else { | |
676 | info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | | |
677 | SOF_TIMESTAMPING_SOFTWARE; | |
678 | info->phc_index = -1; | |
679 | } | |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
bc1f4470 | 684 | static void vlan_dev_get_stats64(struct net_device *dev, |
685 | struct rtnl_link_stats64 *stats) | |
9793241f | 686 | { |
5a4ae5f6 LR |
687 | struct vlan_pcpu_stats *p; |
688 | u32 rx_errors = 0, tx_dropped = 0; | |
689 | int i; | |
9793241f | 690 | |
5a4ae5f6 LR |
691 | for_each_possible_cpu(i) { |
692 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; | |
693 | unsigned int start; | |
694 | ||
695 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); | |
696 | do { | |
697 | start = u64_stats_fetch_begin_irq(&p->syncp); | |
698 | rxpackets = p->rx_packets; | |
699 | rxbytes = p->rx_bytes; | |
700 | rxmulticast = p->rx_multicast; | |
701 | txpackets = p->tx_packets; | |
702 | txbytes = p->tx_bytes; | |
703 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); | |
704 | ||
705 | stats->rx_packets += rxpackets; | |
706 | stats->rx_bytes += rxbytes; | |
707 | stats->multicast += rxmulticast; | |
708 | stats->tx_packets += txpackets; | |
709 | stats->tx_bytes += txbytes; | |
710 | /* rx_errors & tx_dropped are u32 */ | |
711 | rx_errors += p->rx_errors; | |
712 | tx_dropped += p->tx_dropped; | |
9793241f | 713 | } |
5a4ae5f6 LR |
714 | stats->rx_errors = rx_errors; |
715 | stats->tx_dropped = tx_dropped; | |
9793241f ED |
716 | } |
717 | ||
6d4cdf47 | 718 | #ifdef CONFIG_NET_POLL_CONTROLLER |
de93cb2e | 719 | static void vlan_dev_poll_controller(struct net_device *dev) |
6d4cdf47 BL |
720 | { |
721 | return; | |
722 | } | |
723 | ||
a8779ec1 | 724 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) |
6d4cdf47 | 725 | { |
f3da3893 AW |
726 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
727 | struct net_device *real_dev = vlan->real_dev; | |
6d4cdf47 BL |
728 | struct netpoll *netpoll; |
729 | int err = 0; | |
730 | ||
a8779ec1 | 731 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); |
6d4cdf47 BL |
732 | err = -ENOMEM; |
733 | if (!netpoll) | |
734 | goto out; | |
735 | ||
a8779ec1 | 736 | err = __netpoll_setup(netpoll, real_dev); |
6d4cdf47 BL |
737 | if (err) { |
738 | kfree(netpoll); | |
739 | goto out; | |
740 | } | |
741 | ||
f3da3893 | 742 | vlan->netpoll = netpoll; |
6d4cdf47 BL |
743 | |
744 | out: | |
745 | return err; | |
746 | } | |
747 | ||
de93cb2e | 748 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
6d4cdf47 | 749 | { |
f3da3893 AW |
750 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
751 | struct netpoll *netpoll = vlan->netpoll; | |
6d4cdf47 BL |
752 | |
753 | if (!netpoll) | |
754 | return; | |
755 | ||
f3da3893 | 756 | vlan->netpoll = NULL; |
6d4cdf47 | 757 | |
2cde6acd | 758 | __netpoll_free_async(netpoll); |
6d4cdf47 BL |
759 | } |
760 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
761 | ||
2dbf6b50 ND |
762 | static int vlan_dev_get_iflink(const struct net_device *dev) |
763 | { | |
764 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; | |
765 | ||
766 | return real_dev->ifindex; | |
767 | } | |
768 | ||
75b8846a | 769 | static const struct ethtool_ops vlan_ethtool_ops = { |
57709798 | 770 | .get_link_ksettings = vlan_ethtool_get_link_ksettings, |
b3020061 | 771 | .get_drvinfo = vlan_ethtool_get_drvinfo, |
75b8846a | 772 | .get_link = ethtool_op_get_link, |
37dd9255 | 773 | .get_ts_info = vlan_ethtool_get_ts_info, |
75b8846a PM |
774 | }; |
775 | ||
656299f7 SH |
776 | static const struct net_device_ops vlan_netdev_ops = { |
777 | .ndo_change_mtu = vlan_dev_change_mtu, | |
778 | .ndo_init = vlan_dev_init, | |
779 | .ndo_uninit = vlan_dev_uninit, | |
780 | .ndo_open = vlan_dev_open, | |
781 | .ndo_stop = vlan_dev_stop, | |
669d3e0b VD |
782 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
783 | .ndo_validate_addr = eth_validate_addr, | |
784 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
785 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
669d3e0b VD |
786 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
787 | .ndo_do_ioctl = vlan_dev_ioctl, | |
788 | .ndo_neigh_setup = vlan_dev_neigh_setup, | |
9618e2ff | 789 | .ndo_get_stats64 = vlan_dev_get_stats64, |
f4d5392e | 790 | #if IS_ENABLED(CONFIG_FCOE) |
669d3e0b VD |
791 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
792 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
793 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, | |
794 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
795 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, | |
4ea09c9c | 796 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
6d4cdf47 BL |
797 | #endif |
798 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
799 | .ndo_poll_controller = vlan_dev_poll_controller, | |
800 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, | |
801 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, | |
669d3e0b | 802 | #endif |
8a0427bb | 803 | .ndo_fix_features = vlan_dev_fix_features, |
d38569ab | 804 | .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, |
2dbf6b50 | 805 | .ndo_get_iflink = vlan_dev_get_iflink, |
669d3e0b VD |
806 | }; |
807 | ||
a48e5faf ED |
808 | static void vlan_dev_free(struct net_device *dev) |
809 | { | |
810 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
811 | ||
812 | free_percpu(vlan->vlan_pcpu_stats); | |
813 | vlan->vlan_pcpu_stats = NULL; | |
a48e5faf ED |
814 | } |
815 | ||
ef3eb3e5 PM |
816 | void vlan_setup(struct net_device *dev) |
817 | { | |
818 | ether_setup(dev); | |
819 | ||
2e659c05 | 820 | dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE; |
e817af27 | 821 | dev->priv_flags |= IFF_UNICAST_FLT; |
02875878 ED |
822 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
823 | netif_keep_dst(dev); | |
ef3eb3e5 | 824 | |
656299f7 | 825 | dev->netdev_ops = &vlan_netdev_ops; |
cf124db5 DM |
826 | dev->needs_free_netdev = true; |
827 | dev->priv_destructor = vlan_dev_free; | |
75b8846a | 828 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 | 829 | |
91572088 JW |
830 | dev->min_mtu = 0; |
831 | dev->max_mtu = ETH_MAX_MTU; | |
832 | ||
423049ab | 833 | eth_zero_addr(dev->broadcast); |
ef3eb3e5 | 834 | } |