Commit | Line | Data |
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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> |
ec1d8ccb | 32 | #include <linux/phy.h> |
1da177e4 LT |
33 | #include <net/arp.h> |
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)) { |
d58ff351 | 61 | vhdr = skb_push(skb, VLAN_HLEN); |
1da177e4 | 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 | 148 | { |
18d3df3e PA |
149 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
150 | unsigned int max_mtu = real_dev->mtu; | |
151 | ||
152 | if (netif_reduces_vlan_mtu(real_dev)) | |
153 | max_mtu -= VLAN_HLEN; | |
154 | if (max_mtu < new_mtu) | |
1da177e4 LT |
155 | return -ERANGE; |
156 | ||
157 | dev->mtu = new_mtu; | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
c17d8874 | 162 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 163 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 164 | { |
7da82c06 | 165 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b020cb48 PM |
166 | |
167 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
168 | vlan->nr_ingress_mappings--; | |
169 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
170 | vlan->nr_ingress_mappings++; | |
171 | ||
172 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
173 | } |
174 | ||
c17d8874 | 175 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 176 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 177 | { |
7da82c06 | 178 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 LT |
179 | struct vlan_priority_tci_mapping *mp = NULL; |
180 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 181 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 182 | |
c17d8874 | 183 | /* See if a priority mapping exists.. */ |
b020cb48 | 184 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
185 | while (mp) { |
186 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
187 | if (mp->vlan_qos && !vlan_qos) |
188 | vlan->nr_egress_mappings--; | |
189 | else if (!mp->vlan_qos && vlan_qos) | |
190 | vlan->nr_egress_mappings++; | |
191 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 192 | return 0; |
1da177e4 | 193 | } |
c17d8874 | 194 | mp = mp->next; |
1da177e4 | 195 | } |
c17d8874 PM |
196 | |
197 | /* Create a new mapping then. */ | |
b020cb48 | 198 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
199 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
200 | if (!np) | |
201 | return -ENOBUFS; | |
202 | ||
203 | np->next = mp; | |
204 | np->priority = skb_prio; | |
b020cb48 | 205 | np->vlan_qos = vlan_qos; |
3e3aac49 ED |
206 | /* Before inserting this element in hash table, make sure all its fields |
207 | * are committed to memory. | |
e267cb96 | 208 | * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() |
3e3aac49 ED |
209 | */ |
210 | smp_wmb(); | |
b020cb48 PM |
211 | vlan->egress_priority_map[skb_prio & 0xF] = np; |
212 | if (vlan_qos) | |
213 | vlan->nr_egress_mappings++; | |
c17d8874 | 214 | return 0; |
1da177e4 LT |
215 | } |
216 | ||
84a2fba2 SL |
217 | /* Flags are defined in the vlan_flags enum in |
218 | * include/uapi/linux/if_vlan.h file. | |
219 | */ | |
b3ce0325 | 220 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 221 | { |
7da82c06 | 222 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b3ce0325 PM |
223 | u32 old_flags = vlan->flags; |
224 | ||
5e756593 | 225 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
8c8b3458 MM |
226 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP | |
227 | VLAN_FLAG_BRIDGE_BINDING)) | |
b3ce0325 PM |
228 | return -EINVAL; |
229 | ||
230 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
231 | |
232 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
233 | if (vlan->flags & VLAN_FLAG_GVRP) | |
234 | vlan_gvrp_request_join(dev); | |
235 | else | |
236 | vlan_gvrp_request_leave(dev); | |
237 | } | |
86fbe9bb DW |
238 | |
239 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { | |
240 | if (vlan->flags & VLAN_FLAG_MVRP) | |
241 | vlan_mvrp_request_join(dev); | |
242 | else | |
243 | vlan_mvrp_request_leave(dev); | |
244 | } | |
b3ce0325 | 245 | return 0; |
1da177e4 LT |
246 | } |
247 | ||
c17d8874 | 248 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 249 | { |
7da82c06 | 250 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
1da177e4 LT |
251 | } |
252 | ||
308453aa MM |
253 | bool vlan_dev_inherit_address(struct net_device *dev, |
254 | struct net_device *real_dev) | |
255 | { | |
256 | if (dev->addr_assign_type != NET_ADDR_STOLEN) | |
257 | return false; | |
258 | ||
259 | ether_addr_copy(dev->dev_addr, real_dev->dev_addr); | |
260 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
261 | return true; | |
262 | } | |
263 | ||
ef3eb3e5 | 264 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 265 | { |
7da82c06 | 266 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
8c979c26 PM |
267 | struct net_device *real_dev = vlan->real_dev; |
268 | int err; | |
269 | ||
5e756593 PM |
270 | if (!(real_dev->flags & IFF_UP) && |
271 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
272 | return -ENETDOWN; |
273 | ||
308453aa MM |
274 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) && |
275 | !vlan_dev_inherit_address(dev, real_dev)) { | |
a748ee24 | 276 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 277 | if (err < 0) |
89146504 | 278 | goto out; |
8c979c26 | 279 | } |
8c979c26 | 280 | |
89146504 WC |
281 | if (dev->flags & IFF_ALLMULTI) { |
282 | err = dev_set_allmulti(real_dev, 1); | |
283 | if (err < 0) | |
284 | goto del_unicast; | |
285 | } | |
286 | if (dev->flags & IFF_PROMISC) { | |
287 | err = dev_set_promiscuity(real_dev, 1); | |
288 | if (err < 0) | |
289 | goto clear_allmulti; | |
290 | } | |
291 | ||
07fc67be | 292 | ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); |
6c78dcbd | 293 | |
70c03b49 PM |
294 | if (vlan->flags & VLAN_FLAG_GVRP) |
295 | vlan_gvrp_request_join(dev); | |
296 | ||
86fbe9bb DW |
297 | if (vlan->flags & VLAN_FLAG_MVRP) |
298 | vlan_mvrp_request_join(dev); | |
299 | ||
76052d8c MM |
300 | if (netif_carrier_ok(real_dev) && |
301 | !(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) | |
0ac820ee | 302 | netif_carrier_on(dev); |
1da177e4 | 303 | return 0; |
89146504 WC |
304 | |
305 | clear_allmulti: | |
306 | if (dev->flags & IFF_ALLMULTI) | |
307 | dev_set_allmulti(real_dev, -1); | |
308 | del_unicast: | |
53a2b3a1 | 309 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 310 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 311 | out: |
adc667e8 | 312 | netif_carrier_off(dev); |
89146504 | 313 | return err; |
1da177e4 LT |
314 | } |
315 | ||
ef3eb3e5 | 316 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 317 | { |
7da82c06 | 318 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
70c03b49 PM |
319 | struct net_device *real_dev = vlan->real_dev; |
320 | ||
56addd6e | 321 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 322 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
323 | if (dev->flags & IFF_ALLMULTI) |
324 | dev_set_allmulti(real_dev, -1); | |
325 | if (dev->flags & IFF_PROMISC) | |
326 | dev_set_promiscuity(real_dev, -1); | |
327 | ||
53a2b3a1 | 328 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 329 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 330 | |
76052d8c MM |
331 | if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) |
332 | netif_carrier_off(dev); | |
1da177e4 LT |
333 | return 0; |
334 | } | |
335 | ||
ef3eb3e5 | 336 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 337 | { |
7da82c06 | 338 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
39aaac11 PM |
339 | struct sockaddr *addr = p; |
340 | int err; | |
341 | ||
342 | if (!is_valid_ether_addr(addr->sa_data)) | |
343 | return -EADDRNOTAVAIL; | |
344 | ||
345 | if (!(dev->flags & IFF_UP)) | |
346 | goto out; | |
347 | ||
53a2b3a1 | 348 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
a748ee24 | 349 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
350 | if (err < 0) |
351 | return err; | |
352 | } | |
353 | ||
53a2b3a1 | 354 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 355 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
356 | |
357 | out: | |
07fc67be | 358 | ether_addr_copy(dev->dev_addr, addr->sa_data); |
39aaac11 PM |
359 | return 0; |
360 | } | |
361 | ||
ef3eb3e5 | 362 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 363 | { |
7da82c06 | 364 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
656299f7 | 365 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
366 | struct ifreq ifrr; |
367 | int err = -EOPNOTSUPP; | |
368 | ||
369 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
370 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
371 | ||
2029cc2c | 372 | switch (cmd) { |
1da177e4 LT |
373 | case SIOCGMIIPHY: |
374 | case SIOCGMIIREG: | |
375 | case SIOCSMIIREG: | |
a6111d3c SS |
376 | case SIOCSHWTSTAMP: |
377 | case SIOCGHWTSTAMP: | |
656299f7 SH |
378 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
379 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 380 | break; |
1da177e4 LT |
381 | } |
382 | ||
122952fc | 383 | if (!err) |
1da177e4 LT |
384 | ifr->ifr_ifru = ifrr.ifr_ifru; |
385 | ||
386 | return err; | |
387 | } | |
388 | ||
cc883d16 FB |
389 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
390 | { | |
7da82c06 | 391 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
cc883d16 FB |
392 | const struct net_device_ops *ops = real_dev->netdev_ops; |
393 | int err = 0; | |
394 | ||
395 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 396 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
397 | |
398 | return err; | |
399 | } | |
400 | ||
f4d5392e | 401 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
402 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
403 | struct scatterlist *sgl, unsigned int sgc) | |
404 | { | |
7da82c06 | 405 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
406 | const struct net_device_ops *ops = real_dev->netdev_ops; |
407 | int rc = 0; | |
408 | ||
409 | if (ops->ndo_fcoe_ddp_setup) | |
410 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
411 | ||
412 | return rc; | |
413 | } | |
414 | ||
415 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
416 | { | |
7da82c06 | 417 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
418 | const struct net_device_ops *ops = real_dev->netdev_ops; |
419 | int len = 0; | |
420 | ||
421 | if (ops->ndo_fcoe_ddp_done) | |
422 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
423 | ||
424 | return len; | |
425 | } | |
0af46d99 YZ |
426 | |
427 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
428 | { | |
7da82c06 | 429 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
430 | const struct net_device_ops *ops = real_dev->netdev_ops; |
431 | int rc = -EINVAL; | |
432 | ||
433 | if (ops->ndo_fcoe_enable) | |
434 | rc = ops->ndo_fcoe_enable(real_dev); | |
435 | return rc; | |
436 | } | |
437 | ||
438 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
439 | { | |
7da82c06 | 440 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
441 | const struct net_device_ops *ops = real_dev->netdev_ops; |
442 | int rc = -EINVAL; | |
443 | ||
444 | if (ops->ndo_fcoe_disable) | |
445 | rc = ops->ndo_fcoe_disable(real_dev); | |
446 | return rc; | |
447 | } | |
d6534799 | 448 | |
0a89eb92 CL |
449 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, |
450 | struct scatterlist *sgl, unsigned int sgc) | |
d6534799 | 451 | { |
7da82c06 | 452 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
d6534799 | 453 | const struct net_device_ops *ops = real_dev->netdev_ops; |
0a89eb92 CL |
454 | int rc = 0; |
455 | ||
456 | if (ops->ndo_fcoe_ddp_target) | |
457 | rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); | |
d6534799 | 458 | |
d6534799 YZ |
459 | return rc; |
460 | } | |
0a89eb92 | 461 | #endif |
4ea09c9c | 462 | |
0a89eb92 CL |
463 | #ifdef NETDEV_FCOE_WWNN |
464 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
4ea09c9c | 465 | { |
7da82c06 | 466 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
4ea09c9c | 467 | const struct net_device_ops *ops = real_dev->netdev_ops; |
0a89eb92 | 468 | int rc = -EINVAL; |
4ea09c9c | 469 | |
0a89eb92 CL |
470 | if (ops->ndo_fcoe_get_wwn) |
471 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); | |
4ea09c9c YZ |
472 | return rc; |
473 | } | |
b85daa53 VD |
474 | #endif |
475 | ||
ef3eb3e5 | 476 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 477 | { |
7da82c06 | 478 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
6c78dcbd | 479 | |
deede2fa MK |
480 | if (dev->flags & IFF_UP) { |
481 | if (change & IFF_ALLMULTI) | |
482 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
483 | if (change & IFF_PROMISC) | |
484 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
485 | } | |
6c78dcbd PM |
486 | } |
487 | ||
e83a2ea8 | 488 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 489 | { |
d38569ab VY |
490 | dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
491 | dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); | |
1da177e4 | 492 | } |
ef3eb3e5 PM |
493 | |
494 | /* | |
495 | * vlan network devices have devices nesting below it, and are a special | |
496 | * "super class" of normal network devices; split their locks off into a | |
497 | * separate class since they always nest. | |
498 | */ | |
499 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 500 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 501 | |
e8a0464c DM |
502 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
503 | struct netdev_queue *txq, | |
504 | void *_subclass) | |
c773e847 DM |
505 | { |
506 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
507 | &vlan_netdev_xmit_lock_key, |
508 | *(int *)_subclass); | |
c773e847 DM |
509 | } |
510 | ||
511 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
512 | { | |
cf508b12 DM |
513 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
514 | &vlan_netdev_addr_lock_key, | |
515 | subclass); | |
e8a0464c | 516 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
517 | } |
518 | ||
d38569ab VY |
519 | static int vlan_dev_get_lock_subclass(struct net_device *dev) |
520 | { | |
521 | return vlan_dev_priv(dev)->nest_level; | |
522 | } | |
523 | ||
ef3eb3e5 PM |
524 | static const struct header_ops vlan_header_ops = { |
525 | .create = vlan_dev_hard_header, | |
ef3eb3e5 PM |
526 | .parse = eth_header_parse, |
527 | }; | |
528 | ||
2205369a DM |
529 | static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, |
530 | unsigned short type, | |
531 | const void *daddr, const void *saddr, | |
532 | unsigned int len) | |
533 | { | |
534 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
535 | struct net_device *real_dev = vlan->real_dev; | |
536 | ||
dd38743b PB |
537 | if (saddr == NULL) |
538 | saddr = dev->dev_addr; | |
539 | ||
2205369a DM |
540 | return dev_hard_header(skb, real_dev, type, daddr, saddr, len); |
541 | } | |
542 | ||
543 | static const struct header_ops vlan_passthru_header_ops = { | |
544 | .create = vlan_passthru_hard_header, | |
2205369a DM |
545 | .parse = eth_header_parse, |
546 | }; | |
547 | ||
e949b09b DG |
548 | static struct device_type vlan_type = { |
549 | .name = "vlan", | |
550 | }; | |
551 | ||
213b15ca | 552 | static const struct net_device_ops vlan_netdev_ops; |
f7d1b9f5 | 553 | |
ef3eb3e5 PM |
554 | static int vlan_dev_init(struct net_device *dev) |
555 | { | |
76052d8c MM |
556 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
557 | struct net_device *real_dev = vlan->real_dev; | |
ef3eb3e5 | 558 | |
adc667e8 JV |
559 | netif_carrier_off(dev); |
560 | ||
ef3eb3e5 | 561 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
194dbcc8 JF |
562 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
563 | IFF_MASTER | IFF_SLAVE); | |
ef3eb3e5 PM |
564 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | |
565 | (1<<__LINK_STATE_DORMANT))) | | |
566 | (1<<__LINK_STATE_PRESENT); | |
567 | ||
76052d8c MM |
568 | if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING) |
569 | dev->state |= (1 << __LINK_STATE_NOCARRIER); | |
570 | ||
a188222b | 571 | dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | |
53f6b708 | 572 | NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | |
7dad9937 | 573 | NETIF_F_GSO_ENCAP_ALL | |
53692b1d | 574 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC | |
62f2a3a4 MM |
575 | NETIF_F_ALL_FCOE; |
576 | ||
88997e42 | 577 | dev->features |= dev->hw_features | NETIF_F_LLTX; |
1ae4be22 | 578 | dev->gso_max_size = real_dev->gso_max_size; |
f6773c5e | 579 | dev->gso_max_segs = real_dev->gso_max_segs; |
2adb956b VY |
580 | if (dev->features & NETIF_F_VLAN_FEATURES) |
581 | netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); | |
582 | ||
8d463504 | 583 | dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; |
7dad9937 | 584 | dev->hw_enc_features = vlan_tnl_features(real_dev); |
5fb13570 | 585 | |
ef3eb3e5 PM |
586 | /* ipv6 shared card related stuff */ |
587 | dev->dev_id = real_dev->dev_id; | |
588 | ||
308453aa MM |
589 | if (is_zero_ether_addr(dev->dev_addr)) { |
590 | ether_addr_copy(dev->dev_addr, real_dev->dev_addr); | |
591 | dev->addr_assign_type = NET_ADDR_STOLEN; | |
592 | } | |
ef3eb3e5 PM |
593 | if (is_zero_ether_addr(dev->broadcast)) |
594 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
595 | ||
f4d5392e | 596 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
597 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
598 | #endif | |
599 | ||
d870bfb9 | 600 | dev->needed_headroom = real_dev->needed_headroom; |
76052d8c | 601 | if (vlan_hw_offload_capable(real_dev->features, vlan->vlan_proto)) { |
2205369a | 602 | dev->header_ops = &vlan_passthru_header_ops; |
ef3eb3e5 | 603 | dev->hard_header_len = real_dev->hard_header_len; |
ef3eb3e5 PM |
604 | } else { |
605 | dev->header_ops = &vlan_header_ops; | |
606 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
ef3eb3e5 PM |
607 | } |
608 | ||
213b15ca | 609 | dev->netdev_ops = &vlan_netdev_ops; |
636e19a3 | 610 | |
e949b09b DG |
611 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
612 | ||
d38569ab | 613 | vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); |
9793241f | 614 | |
76052d8c MM |
615 | vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
616 | if (!vlan->vlan_pcpu_stats) | |
9793241f ED |
617 | return -ENOMEM; |
618 | ||
ef3eb3e5 PM |
619 | return 0; |
620 | } | |
621 | ||
23556323 PE |
622 | static void vlan_dev_uninit(struct net_device *dev) |
623 | { | |
624 | struct vlan_priority_tci_mapping *pm; | |
7da82c06 | 625 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
23556323 PE |
626 | int i; |
627 | ||
628 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { | |
629 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
630 | vlan->egress_priority_map[i] = pm->next; | |
631 | kfree(pm); | |
632 | } | |
633 | } | |
634 | } | |
635 | ||
c8f44aff MM |
636 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
637 | netdev_features_t features) | |
8a0427bb | 638 | { |
7da82c06 | 639 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b29d3145 | 640 | netdev_features_t old_features = features; |
8403debe | 641 | netdev_features_t lower_features; |
8a0427bb | 642 | |
8403debe VY |
643 | lower_features = netdev_intersect_features((real_dev->vlan_features | |
644 | NETIF_F_RXCSUM), | |
645 | real_dev->features); | |
712ae51a | 646 | |
8403debe VY |
647 | /* Add HW_CSUM setting to preserve user ability to control |
648 | * checksum offload on the vlan device. | |
649 | */ | |
650 | if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)) | |
651 | lower_features |= NETIF_F_HW_CSUM; | |
652 | features = netdev_intersect_features(features, lower_features); | |
53f6b708 | 653 | features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); |
f0a619cc | 654 | features |= NETIF_F_LLTX; |
8a0427bb MM |
655 | |
656 | return features; | |
657 | } | |
658 | ||
57709798 DD |
659 | static int vlan_ethtool_get_link_ksettings(struct net_device *dev, |
660 | struct ethtool_link_ksettings *cmd) | |
b3020061 | 661 | { |
7da82c06 | 662 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
4bc71cb9 | 663 | |
57709798 | 664 | return __ethtool_get_link_ksettings(vlan->real_dev, cmd); |
b3020061 SH |
665 | } |
666 | ||
667 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
668 | struct ethtool_drvinfo *info) | |
669 | { | |
7826d43f JP |
670 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
671 | strlcpy(info->version, vlan_version, sizeof(info->version)); | |
672 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
b3020061 SH |
673 | } |
674 | ||
37dd9255 RC |
675 | static int vlan_ethtool_get_ts_info(struct net_device *dev, |
676 | struct ethtool_ts_info *info) | |
677 | { | |
678 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
679 | const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; | |
ec1d8ccb | 680 | struct phy_device *phydev = vlan->real_dev->phydev; |
37dd9255 | 681 | |
ec1d8ccb HL |
682 | if (phydev && phydev->drv && phydev->drv->ts_info) { |
683 | return phydev->drv->ts_info(phydev, info); | |
684 | } else if (ops->get_ts_info) { | |
37dd9255 RC |
685 | return ops->get_ts_info(vlan->real_dev, info); |
686 | } else { | |
687 | info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | | |
688 | SOF_TIMESTAMPING_SOFTWARE; | |
689 | info->phc_index = -1; | |
690 | } | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
bc1f4470 | 695 | static void vlan_dev_get_stats64(struct net_device *dev, |
696 | struct rtnl_link_stats64 *stats) | |
9793241f | 697 | { |
5a4ae5f6 LR |
698 | struct vlan_pcpu_stats *p; |
699 | u32 rx_errors = 0, tx_dropped = 0; | |
700 | int i; | |
9793241f | 701 | |
5a4ae5f6 LR |
702 | for_each_possible_cpu(i) { |
703 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; | |
704 | unsigned int start; | |
705 | ||
706 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); | |
707 | do { | |
708 | start = u64_stats_fetch_begin_irq(&p->syncp); | |
709 | rxpackets = p->rx_packets; | |
710 | rxbytes = p->rx_bytes; | |
711 | rxmulticast = p->rx_multicast; | |
712 | txpackets = p->tx_packets; | |
713 | txbytes = p->tx_bytes; | |
714 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); | |
715 | ||
716 | stats->rx_packets += rxpackets; | |
717 | stats->rx_bytes += rxbytes; | |
718 | stats->multicast += rxmulticast; | |
719 | stats->tx_packets += txpackets; | |
720 | stats->tx_bytes += txbytes; | |
721 | /* rx_errors & tx_dropped are u32 */ | |
722 | rx_errors += p->rx_errors; | |
723 | tx_dropped += p->tx_dropped; | |
9793241f | 724 | } |
5a4ae5f6 LR |
725 | stats->rx_errors = rx_errors; |
726 | stats->tx_dropped = tx_dropped; | |
9793241f ED |
727 | } |
728 | ||
6d4cdf47 | 729 | #ifdef CONFIG_NET_POLL_CONTROLLER |
de93cb2e | 730 | static void vlan_dev_poll_controller(struct net_device *dev) |
6d4cdf47 BL |
731 | { |
732 | return; | |
733 | } | |
734 | ||
a8779ec1 | 735 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) |
6d4cdf47 | 736 | { |
f3da3893 AW |
737 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
738 | struct net_device *real_dev = vlan->real_dev; | |
6d4cdf47 BL |
739 | struct netpoll *netpoll; |
740 | int err = 0; | |
741 | ||
a8779ec1 | 742 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); |
6d4cdf47 BL |
743 | err = -ENOMEM; |
744 | if (!netpoll) | |
745 | goto out; | |
746 | ||
a8779ec1 | 747 | err = __netpoll_setup(netpoll, real_dev); |
6d4cdf47 BL |
748 | if (err) { |
749 | kfree(netpoll); | |
750 | goto out; | |
751 | } | |
752 | ||
f3da3893 | 753 | vlan->netpoll = netpoll; |
6d4cdf47 BL |
754 | |
755 | out: | |
756 | return err; | |
757 | } | |
758 | ||
de93cb2e | 759 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
6d4cdf47 | 760 | { |
f3da3893 AW |
761 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
762 | struct netpoll *netpoll = vlan->netpoll; | |
6d4cdf47 BL |
763 | |
764 | if (!netpoll) | |
765 | return; | |
766 | ||
f3da3893 | 767 | vlan->netpoll = NULL; |
c9fbd71f | 768 | __netpoll_free(netpoll); |
6d4cdf47 BL |
769 | } |
770 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
771 | ||
2dbf6b50 ND |
772 | static int vlan_dev_get_iflink(const struct net_device *dev) |
773 | { | |
774 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; | |
775 | ||
776 | return real_dev->ifindex; | |
777 | } | |
778 | ||
75b8846a | 779 | static const struct ethtool_ops vlan_ethtool_ops = { |
57709798 | 780 | .get_link_ksettings = vlan_ethtool_get_link_ksettings, |
b3020061 | 781 | .get_drvinfo = vlan_ethtool_get_drvinfo, |
75b8846a | 782 | .get_link = ethtool_op_get_link, |
37dd9255 | 783 | .get_ts_info = vlan_ethtool_get_ts_info, |
75b8846a PM |
784 | }; |
785 | ||
656299f7 SH |
786 | static const struct net_device_ops vlan_netdev_ops = { |
787 | .ndo_change_mtu = vlan_dev_change_mtu, | |
788 | .ndo_init = vlan_dev_init, | |
789 | .ndo_uninit = vlan_dev_uninit, | |
790 | .ndo_open = vlan_dev_open, | |
791 | .ndo_stop = vlan_dev_stop, | |
669d3e0b VD |
792 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
793 | .ndo_validate_addr = eth_validate_addr, | |
794 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
795 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
669d3e0b VD |
796 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
797 | .ndo_do_ioctl = vlan_dev_ioctl, | |
798 | .ndo_neigh_setup = vlan_dev_neigh_setup, | |
9618e2ff | 799 | .ndo_get_stats64 = vlan_dev_get_stats64, |
f4d5392e | 800 | #if IS_ENABLED(CONFIG_FCOE) |
669d3e0b VD |
801 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
802 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
803 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, | |
804 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
4ea09c9c | 805 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
6d4cdf47 | 806 | #endif |
0a89eb92 CL |
807 | #ifdef NETDEV_FCOE_WWNN |
808 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, | |
809 | #endif | |
6d4cdf47 BL |
810 | #ifdef CONFIG_NET_POLL_CONTROLLER |
811 | .ndo_poll_controller = vlan_dev_poll_controller, | |
812 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, | |
813 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, | |
669d3e0b | 814 | #endif |
8a0427bb | 815 | .ndo_fix_features = vlan_dev_fix_features, |
d38569ab | 816 | .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, |
2dbf6b50 | 817 | .ndo_get_iflink = vlan_dev_get_iflink, |
669d3e0b VD |
818 | }; |
819 | ||
a48e5faf ED |
820 | static void vlan_dev_free(struct net_device *dev) |
821 | { | |
822 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
823 | ||
824 | free_percpu(vlan->vlan_pcpu_stats); | |
825 | vlan->vlan_pcpu_stats = NULL; | |
a48e5faf ED |
826 | } |
827 | ||
ef3eb3e5 PM |
828 | void vlan_setup(struct net_device *dev) |
829 | { | |
830 | ether_setup(dev); | |
831 | ||
2e659c05 | 832 | dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE; |
e817af27 | 833 | dev->priv_flags |= IFF_UNICAST_FLT; |
02875878 ED |
834 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
835 | netif_keep_dst(dev); | |
ef3eb3e5 | 836 | |
656299f7 | 837 | dev->netdev_ops = &vlan_netdev_ops; |
cf124db5 DM |
838 | dev->needs_free_netdev = true; |
839 | dev->priv_destructor = vlan_dev_free; | |
75b8846a | 840 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 | 841 | |
91572088 JW |
842 | dev->min_mtu = 0; |
843 | dev->max_mtu = ETH_MAX_MTU; | |
844 | ||
423049ab | 845 | eth_zero_addr(dev->broadcast); |
ef3eb3e5 | 846 | } |