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> |
1da177e4 LT |
32 | #include <net/arp.h> |
33 | ||
34 | #include "vlan.h" | |
35 | #include "vlanproc.h" | |
36 | #include <linux/if_vlan.h> | |
6d4cdf47 | 37 | #include <linux/netpoll.h> |
1da177e4 LT |
38 | |
39 | /* | |
40 | * Rebuild the Ethernet MAC header. This is called after an ARP | |
41 | * (or in future other address resolution) has completed on this | |
42 | * sk_buff. We now let ARP fill in the other fields. | |
43 | * | |
44 | * This routine CANNOT use cached dst->neigh! | |
45 | * Really, it is used only when dst->neigh is wrong. | |
46 | * | |
47 | * TODO: This needs a checkup, I'm ignorant here. --BLG | |
48 | */ | |
ef3eb3e5 | 49 | static int vlan_dev_rebuild_header(struct sk_buff *skb) |
1da177e4 LT |
50 | { |
51 | struct net_device *dev = skb->dev; | |
52 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); | |
53 | ||
54 | switch (veth->h_vlan_encapsulated_proto) { | |
55 | #ifdef CONFIG_INET | |
60678040 | 56 | case htons(ETH_P_IP): |
1da177e4 LT |
57 | |
58 | /* TODO: Confirm this will work with VLAN headers... */ | |
59 | return arp_find(veth->h_dest, skb); | |
122952fc | 60 | #endif |
1da177e4 | 61 | default: |
afab2d29 | 62 | pr_debug("%s: unable to resolve type %X addresses\n", |
40f98e1a | 63 | dev->name, ntohs(veth->h_vlan_encapsulated_proto)); |
122952fc | 64 | |
07fc67be | 65 | ether_addr_copy(veth->h_source, dev->dev_addr); |
1da177e4 | 66 | break; |
3ff50b79 | 67 | } |
1da177e4 LT |
68 | |
69 | return 0; | |
70 | } | |
71 | ||
1da177e4 | 72 | /* |
122952fc | 73 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
74 | * |
75 | * saddr=NULL means use device source address | |
76 | * daddr=NULL means leave destination address (eg unresolved arp) | |
77 | * | |
78 | * This is called when the SKB is moving down the stack towards the | |
79 | * physical devices. | |
80 | */ | |
ef3eb3e5 PM |
81 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
82 | unsigned short type, | |
83 | const void *daddr, const void *saddr, | |
84 | unsigned int len) | |
1da177e4 | 85 | { |
1fd9b1fc | 86 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 87 | struct vlan_hdr *vhdr; |
1349fe9a | 88 | unsigned int vhdrlen = 0; |
9bb8582e | 89 | u16 vlan_tci = 0; |
1349fe9a | 90 | int rc; |
1da177e4 | 91 | |
0c0667a8 | 92 | if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { |
1da177e4 LT |
93 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
94 | ||
0c0667a8 | 95 | vlan_tci = vlan->vlan_id; |
e267cb96 | 96 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
9bb8582e | 97 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
98 | |
99 | /* | |
bf9ae538 OP |
100 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
101 | * put the length in here instead. | |
1da177e4 | 102 | */ |
bf9ae538 | 103 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
1da177e4 | 104 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 105 | else |
1da177e4 | 106 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a | 107 | |
1fd9b1fc PM |
108 | skb->protocol = vlan->vlan_proto; |
109 | type = ntohs(vlan->vlan_proto); | |
1349fe9a | 110 | vhdrlen = VLAN_HLEN; |
1da177e4 LT |
111 | } |
112 | ||
113 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
114 | if (saddr == NULL) | |
115 | saddr = dev->dev_addr; | |
116 | ||
1349fe9a | 117 | /* Now make the underlying real hard header */ |
0c0667a8 | 118 | dev = vlan->real_dev; |
1349fe9a PM |
119 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
120 | if (rc > 0) | |
121 | rc += vhdrlen; | |
1da177e4 LT |
122 | return rc; |
123 | } | |
124 | ||
6eacf8ad AW |
125 | static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) |
126 | { | |
127 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
128 | if (vlan->netpoll) | |
129 | netpoll_send_skb(vlan->netpoll, skb); | |
130 | #else | |
131 | BUG(); | |
132 | #endif | |
133 | return NETDEV_TX_OK; | |
134 | } | |
135 | ||
6fef4c0c SH |
136 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
137 | struct net_device *dev) | |
1da177e4 | 138 | { |
6eacf8ad | 139 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 140 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
1a123a31 ED |
141 | unsigned int len; |
142 | int ret; | |
55b01e86 | 143 | |
1da177e4 LT |
144 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
145 | * | |
146 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
147 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
148 | */ | |
1fd9b1fc | 149 | if (veth->h_vlan_proto != vlan->vlan_proto || |
6eacf8ad | 150 | vlan->flags & VLAN_FLAG_REORDER_HDR) { |
9bb8582e | 151 | u16 vlan_tci; |
6eacf8ad | 152 | vlan_tci = vlan->vlan_id; |
e267cb96 | 153 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
b960a0ac | 154 | __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); |
1da177e4 LT |
155 | } |
156 | ||
6eacf8ad | 157 | skb->dev = vlan->real_dev; |
1a123a31 | 158 | len = skb->len; |
6eacf8ad AW |
159 | if (unlikely(netpoll_tx_running(dev))) |
160 | return vlan_netpoll_send_skb(vlan, skb); | |
161 | ||
1a123a31 ED |
162 | ret = dev_queue_xmit(skb); |
163 | ||
2d6c9ffc | 164 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
4af429d2 ED |
165 | struct vlan_pcpu_stats *stats; |
166 | ||
6eacf8ad | 167 | stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
4af429d2 ED |
168 | u64_stats_update_begin(&stats->syncp); |
169 | stats->tx_packets++; | |
170 | stats->tx_bytes += len; | |
307f73df | 171 | u64_stats_update_end(&stats->syncp); |
4af429d2 | 172 | } else { |
6eacf8ad | 173 | this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
4af429d2 | 174 | } |
1a123a31 | 175 | |
cbbef5e1 | 176 | return ret; |
1da177e4 LT |
177 | } |
178 | ||
ef3eb3e5 | 179 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
180 | { |
181 | /* TODO: gotta make sure the underlying layer can handle it, | |
182 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
183 | */ | |
7da82c06 | 184 | if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
185 | return -ERANGE; |
186 | ||
187 | dev->mtu = new_mtu; | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
c17d8874 | 192 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 193 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 194 | { |
7da82c06 | 195 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b020cb48 PM |
196 | |
197 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
198 | vlan->nr_ingress_mappings--; | |
199 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
200 | vlan->nr_ingress_mappings++; | |
201 | ||
202 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
203 | } |
204 | ||
c17d8874 | 205 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 206 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 207 | { |
7da82c06 | 208 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 LT |
209 | struct vlan_priority_tci_mapping *mp = NULL; |
210 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 211 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 212 | |
c17d8874 | 213 | /* See if a priority mapping exists.. */ |
b020cb48 | 214 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
215 | while (mp) { |
216 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
217 | if (mp->vlan_qos && !vlan_qos) |
218 | vlan->nr_egress_mappings--; | |
219 | else if (!mp->vlan_qos && vlan_qos) | |
220 | vlan->nr_egress_mappings++; | |
221 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 222 | return 0; |
1da177e4 | 223 | } |
c17d8874 | 224 | mp = mp->next; |
1da177e4 | 225 | } |
c17d8874 PM |
226 | |
227 | /* Create a new mapping then. */ | |
b020cb48 | 228 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
229 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
230 | if (!np) | |
231 | return -ENOBUFS; | |
232 | ||
233 | np->next = mp; | |
234 | np->priority = skb_prio; | |
b020cb48 | 235 | np->vlan_qos = vlan_qos; |
3e3aac49 ED |
236 | /* Before inserting this element in hash table, make sure all its fields |
237 | * are committed to memory. | |
e267cb96 | 238 | * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() |
3e3aac49 ED |
239 | */ |
240 | smp_wmb(); | |
b020cb48 PM |
241 | vlan->egress_priority_map[skb_prio & 0xF] = np; |
242 | if (vlan_qos) | |
243 | vlan->nr_egress_mappings++; | |
c17d8874 | 244 | return 0; |
1da177e4 LT |
245 | } |
246 | ||
a4bf3af4 | 247 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 248 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 249 | { |
7da82c06 | 250 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b3ce0325 PM |
251 | u32 old_flags = vlan->flags; |
252 | ||
5e756593 | 253 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
86fbe9bb | 254 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) |
b3ce0325 PM |
255 | return -EINVAL; |
256 | ||
257 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
258 | |
259 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
260 | if (vlan->flags & VLAN_FLAG_GVRP) | |
261 | vlan_gvrp_request_join(dev); | |
262 | else | |
263 | vlan_gvrp_request_leave(dev); | |
264 | } | |
86fbe9bb DW |
265 | |
266 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { | |
267 | if (vlan->flags & VLAN_FLAG_MVRP) | |
268 | vlan_mvrp_request_join(dev); | |
269 | else | |
270 | vlan_mvrp_request_leave(dev); | |
271 | } | |
b3ce0325 | 272 | return 0; |
1da177e4 LT |
273 | } |
274 | ||
c17d8874 | 275 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 276 | { |
7da82c06 | 277 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
1da177e4 LT |
278 | } |
279 | ||
ef3eb3e5 | 280 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 281 | { |
7da82c06 | 282 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
8c979c26 PM |
283 | struct net_device *real_dev = vlan->real_dev; |
284 | int err; | |
285 | ||
5e756593 PM |
286 | if (!(real_dev->flags & IFF_UP) && |
287 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
288 | return -ENETDOWN; |
289 | ||
53a2b3a1 | 290 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { |
a748ee24 | 291 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 292 | if (err < 0) |
89146504 | 293 | goto out; |
8c979c26 | 294 | } |
8c979c26 | 295 | |
89146504 WC |
296 | if (dev->flags & IFF_ALLMULTI) { |
297 | err = dev_set_allmulti(real_dev, 1); | |
298 | if (err < 0) | |
299 | goto del_unicast; | |
300 | } | |
301 | if (dev->flags & IFF_PROMISC) { | |
302 | err = dev_set_promiscuity(real_dev, 1); | |
303 | if (err < 0) | |
304 | goto clear_allmulti; | |
305 | } | |
306 | ||
07fc67be | 307 | ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); |
6c78dcbd | 308 | |
70c03b49 PM |
309 | if (vlan->flags & VLAN_FLAG_GVRP) |
310 | vlan_gvrp_request_join(dev); | |
311 | ||
86fbe9bb DW |
312 | if (vlan->flags & VLAN_FLAG_MVRP) |
313 | vlan_mvrp_request_join(dev); | |
314 | ||
0ac820ee PO |
315 | if (netif_carrier_ok(real_dev)) |
316 | netif_carrier_on(dev); | |
1da177e4 | 317 | return 0; |
89146504 WC |
318 | |
319 | clear_allmulti: | |
320 | if (dev->flags & IFF_ALLMULTI) | |
321 | dev_set_allmulti(real_dev, -1); | |
322 | del_unicast: | |
53a2b3a1 | 323 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 324 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 325 | out: |
adc667e8 | 326 | netif_carrier_off(dev); |
89146504 | 327 | return err; |
1da177e4 LT |
328 | } |
329 | ||
ef3eb3e5 | 330 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 331 | { |
7da82c06 | 332 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
70c03b49 PM |
333 | struct net_device *real_dev = vlan->real_dev; |
334 | ||
56addd6e | 335 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 336 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
337 | if (dev->flags & IFF_ALLMULTI) |
338 | dev_set_allmulti(real_dev, -1); | |
339 | if (dev->flags & IFF_PROMISC) | |
340 | dev_set_promiscuity(real_dev, -1); | |
341 | ||
53a2b3a1 | 342 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 343 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 344 | |
adc667e8 | 345 | netif_carrier_off(dev); |
1da177e4 LT |
346 | return 0; |
347 | } | |
348 | ||
ef3eb3e5 | 349 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 350 | { |
7da82c06 | 351 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
39aaac11 PM |
352 | struct sockaddr *addr = p; |
353 | int err; | |
354 | ||
355 | if (!is_valid_ether_addr(addr->sa_data)) | |
356 | return -EADDRNOTAVAIL; | |
357 | ||
358 | if (!(dev->flags & IFF_UP)) | |
359 | goto out; | |
360 | ||
53a2b3a1 | 361 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
a748ee24 | 362 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
363 | if (err < 0) |
364 | return err; | |
365 | } | |
366 | ||
53a2b3a1 | 367 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 368 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
369 | |
370 | out: | |
07fc67be | 371 | ether_addr_copy(dev->dev_addr, addr->sa_data); |
39aaac11 PM |
372 | return 0; |
373 | } | |
374 | ||
ef3eb3e5 | 375 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 376 | { |
7da82c06 | 377 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
656299f7 | 378 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
379 | struct ifreq ifrr; |
380 | int err = -EOPNOTSUPP; | |
381 | ||
382 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
383 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
384 | ||
2029cc2c | 385 | switch (cmd) { |
1da177e4 LT |
386 | case SIOCGMIIPHY: |
387 | case SIOCGMIIREG: | |
388 | case SIOCSMIIREG: | |
a6111d3c SS |
389 | case SIOCSHWTSTAMP: |
390 | case SIOCGHWTSTAMP: | |
656299f7 SH |
391 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
392 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 393 | break; |
1da177e4 LT |
394 | } |
395 | ||
122952fc | 396 | if (!err) |
1da177e4 LT |
397 | ifr->ifr_ifru = ifrr.ifr_ifru; |
398 | ||
399 | return err; | |
400 | } | |
401 | ||
cc883d16 FB |
402 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
403 | { | |
7da82c06 | 404 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
cc883d16 FB |
405 | const struct net_device_ops *ops = real_dev->netdev_ops; |
406 | int err = 0; | |
407 | ||
408 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 409 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
410 | |
411 | return err; | |
412 | } | |
413 | ||
f4d5392e | 414 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
415 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
416 | struct scatterlist *sgl, unsigned int sgc) | |
417 | { | |
7da82c06 | 418 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
419 | const struct net_device_ops *ops = real_dev->netdev_ops; |
420 | int rc = 0; | |
421 | ||
422 | if (ops->ndo_fcoe_ddp_setup) | |
423 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
424 | ||
425 | return rc; | |
426 | } | |
427 | ||
428 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
429 | { | |
7da82c06 | 430 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
431 | const struct net_device_ops *ops = real_dev->netdev_ops; |
432 | int len = 0; | |
433 | ||
434 | if (ops->ndo_fcoe_ddp_done) | |
435 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
436 | ||
437 | return len; | |
438 | } | |
0af46d99 YZ |
439 | |
440 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
441 | { | |
7da82c06 | 442 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
443 | const struct net_device_ops *ops = real_dev->netdev_ops; |
444 | int rc = -EINVAL; | |
445 | ||
446 | if (ops->ndo_fcoe_enable) | |
447 | rc = ops->ndo_fcoe_enable(real_dev); | |
448 | return rc; | |
449 | } | |
450 | ||
451 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
452 | { | |
7da82c06 | 453 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
454 | const struct net_device_ops *ops = real_dev->netdev_ops; |
455 | int rc = -EINVAL; | |
456 | ||
457 | if (ops->ndo_fcoe_disable) | |
458 | rc = ops->ndo_fcoe_disable(real_dev); | |
459 | return rc; | |
460 | } | |
d6534799 YZ |
461 | |
462 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
463 | { | |
7da82c06 | 464 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
d6534799 YZ |
465 | const struct net_device_ops *ops = real_dev->netdev_ops; |
466 | int rc = -EINVAL; | |
467 | ||
468 | if (ops->ndo_fcoe_get_wwn) | |
469 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); | |
470 | return rc; | |
471 | } | |
4ea09c9c YZ |
472 | |
473 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, | |
474 | struct scatterlist *sgl, unsigned int sgc) | |
475 | { | |
7da82c06 | 476 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
4ea09c9c YZ |
477 | const struct net_device_ops *ops = real_dev->netdev_ops; |
478 | int rc = 0; | |
479 | ||
480 | if (ops->ndo_fcoe_ddp_target) | |
481 | rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); | |
482 | ||
483 | return rc; | |
484 | } | |
b85daa53 VD |
485 | #endif |
486 | ||
ef3eb3e5 | 487 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 488 | { |
7da82c06 | 489 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
6c78dcbd | 490 | |
deede2fa MK |
491 | if (dev->flags & IFF_UP) { |
492 | if (change & IFF_ALLMULTI) | |
493 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
494 | if (change & IFF_PROMISC) | |
495 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
496 | } | |
6c78dcbd PM |
497 | } |
498 | ||
e83a2ea8 | 499 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 500 | { |
d38569ab VY |
501 | dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
502 | dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); | |
1da177e4 | 503 | } |
ef3eb3e5 PM |
504 | |
505 | /* | |
506 | * vlan network devices have devices nesting below it, and are a special | |
507 | * "super class" of normal network devices; split their locks off into a | |
508 | * separate class since they always nest. | |
509 | */ | |
510 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 511 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 512 | |
e8a0464c DM |
513 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
514 | struct netdev_queue *txq, | |
515 | void *_subclass) | |
c773e847 DM |
516 | { |
517 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
518 | &vlan_netdev_xmit_lock_key, |
519 | *(int *)_subclass); | |
c773e847 DM |
520 | } |
521 | ||
522 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
523 | { | |
cf508b12 DM |
524 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
525 | &vlan_netdev_addr_lock_key, | |
526 | subclass); | |
e8a0464c | 527 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
528 | } |
529 | ||
d38569ab VY |
530 | static int vlan_dev_get_lock_subclass(struct net_device *dev) |
531 | { | |
532 | return vlan_dev_priv(dev)->nest_level; | |
533 | } | |
534 | ||
ef3eb3e5 PM |
535 | static const struct header_ops vlan_header_ops = { |
536 | .create = vlan_dev_hard_header, | |
537 | .rebuild = vlan_dev_rebuild_header, | |
538 | .parse = eth_header_parse, | |
539 | }; | |
540 | ||
2205369a DM |
541 | static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, |
542 | unsigned short type, | |
543 | const void *daddr, const void *saddr, | |
544 | unsigned int len) | |
545 | { | |
546 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
547 | struct net_device *real_dev = vlan->real_dev; | |
548 | ||
dd38743b PB |
549 | if (saddr == NULL) |
550 | saddr = dev->dev_addr; | |
551 | ||
2205369a DM |
552 | return dev_hard_header(skb, real_dev, type, daddr, saddr, len); |
553 | } | |
554 | ||
555 | static const struct header_ops vlan_passthru_header_ops = { | |
556 | .create = vlan_passthru_hard_header, | |
557 | .rebuild = dev_rebuild_header, | |
558 | .parse = eth_header_parse, | |
559 | }; | |
560 | ||
e949b09b DG |
561 | static struct device_type vlan_type = { |
562 | .name = "vlan", | |
563 | }; | |
564 | ||
213b15ca | 565 | static const struct net_device_ops vlan_netdev_ops; |
f7d1b9f5 | 566 | |
ef3eb3e5 PM |
567 | static int vlan_dev_init(struct net_device *dev) |
568 | { | |
7da82c06 | 569 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
ef3eb3e5 | 570 | |
adc667e8 JV |
571 | netif_carrier_off(dev); |
572 | ||
ef3eb3e5 | 573 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
194dbcc8 JF |
574 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
575 | IFF_MASTER | IFF_SLAVE); | |
ef3eb3e5 PM |
576 | dev->iflink = real_dev->ifindex; |
577 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
578 | (1<<__LINK_STATE_DORMANT))) | | |
579 | (1<<__LINK_STATE_PRESENT); | |
580 | ||
62f2a3a4 | 581 | dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | |
53f6b708 | 582 | NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | |
62f2a3a4 MM |
583 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | |
584 | NETIF_F_ALL_FCOE; | |
585 | ||
53f6b708 TM |
586 | dev->features |= real_dev->vlan_features | NETIF_F_LLTX | |
587 | NETIF_F_GSO_SOFTWARE; | |
1ae4be22 | 588 | dev->gso_max_size = real_dev->gso_max_size; |
2adb956b VY |
589 | if (dev->features & NETIF_F_VLAN_FEATURES) |
590 | netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); | |
591 | ||
5fb13570 | 592 | |
ef3eb3e5 PM |
593 | /* ipv6 shared card related stuff */ |
594 | dev->dev_id = real_dev->dev_id; | |
595 | ||
596 | if (is_zero_ether_addr(dev->dev_addr)) | |
6b93f4a1 | 597 | eth_hw_addr_inherit(dev, real_dev); |
ef3eb3e5 PM |
598 | if (is_zero_ether_addr(dev->broadcast)) |
599 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
600 | ||
f4d5392e | 601 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
602 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
603 | #endif | |
604 | ||
d870bfb9 | 605 | dev->needed_headroom = real_dev->needed_headroom; |
fc0d48b8 VY |
606 | if (vlan_hw_offload_capable(real_dev->features, |
607 | vlan_dev_priv(dev)->vlan_proto)) { | |
2205369a | 608 | dev->header_ops = &vlan_passthru_header_ops; |
ef3eb3e5 | 609 | dev->hard_header_len = real_dev->hard_header_len; |
ef3eb3e5 PM |
610 | } else { |
611 | dev->header_ops = &vlan_header_ops; | |
612 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
ef3eb3e5 PM |
613 | } |
614 | ||
213b15ca | 615 | dev->netdev_ops = &vlan_netdev_ops; |
636e19a3 | 616 | |
e949b09b DG |
617 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
618 | ||
d38569ab | 619 | vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); |
9793241f | 620 | |
1c213bd2 | 621 | vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
7da82c06 | 622 | if (!vlan_dev_priv(dev)->vlan_pcpu_stats) |
9793241f ED |
623 | return -ENOMEM; |
624 | ||
ef3eb3e5 PM |
625 | return 0; |
626 | } | |
627 | ||
23556323 PE |
628 | static void vlan_dev_uninit(struct net_device *dev) |
629 | { | |
630 | struct vlan_priority_tci_mapping *pm; | |
7da82c06 | 631 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
23556323 PE |
632 | int i; |
633 | ||
634 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { | |
635 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
636 | vlan->egress_priority_map[i] = pm->next; | |
637 | kfree(pm); | |
638 | } | |
639 | } | |
640 | } | |
641 | ||
c8f44aff MM |
642 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
643 | netdev_features_t features) | |
8a0427bb | 644 | { |
7da82c06 | 645 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b29d3145 | 646 | netdev_features_t old_features = features; |
8a0427bb | 647 | |
da08143b | 648 | features = netdev_intersect_features(features, real_dev->vlan_features); |
bc5787c6 | 649 | features |= NETIF_F_RXCSUM; |
da08143b | 650 | features = netdev_intersect_features(features, real_dev->features); |
712ae51a | 651 | |
53f6b708 | 652 | features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); |
f0a619cc | 653 | features |= NETIF_F_LLTX; |
8a0427bb MM |
654 | |
655 | return features; | |
656 | } | |
657 | ||
b3020061 SH |
658 | static int vlan_ethtool_get_settings(struct net_device *dev, |
659 | struct ethtool_cmd *cmd) | |
660 | { | |
7da82c06 | 661 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
4bc71cb9 JP |
662 | |
663 | return __ethtool_get_settings(vlan->real_dev, cmd); | |
b3020061 SH |
664 | } |
665 | ||
666 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
667 | struct ethtool_drvinfo *info) | |
668 | { | |
7826d43f JP |
669 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
670 | strlcpy(info->version, vlan_version, sizeof(info->version)); | |
671 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
b3020061 SH |
672 | } |
673 | ||
37dd9255 RC |
674 | static int vlan_ethtool_get_ts_info(struct net_device *dev, |
675 | struct ethtool_ts_info *info) | |
676 | { | |
677 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
678 | const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; | |
679 | ||
680 | if (ops->get_ts_info) { | |
681 | return ops->get_ts_info(vlan->real_dev, info); | |
682 | } else { | |
683 | info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | | |
684 | SOF_TIMESTAMPING_SOFTWARE; | |
685 | info->phc_index = -1; | |
686 | } | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
28172739 | 691 | static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
9793241f | 692 | { |
5a4ae5f6 LR |
693 | struct vlan_pcpu_stats *p; |
694 | u32 rx_errors = 0, tx_dropped = 0; | |
695 | int i; | |
9793241f | 696 | |
5a4ae5f6 LR |
697 | for_each_possible_cpu(i) { |
698 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; | |
699 | unsigned int start; | |
700 | ||
701 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); | |
702 | do { | |
703 | start = u64_stats_fetch_begin_irq(&p->syncp); | |
704 | rxpackets = p->rx_packets; | |
705 | rxbytes = p->rx_bytes; | |
706 | rxmulticast = p->rx_multicast; | |
707 | txpackets = p->tx_packets; | |
708 | txbytes = p->tx_bytes; | |
709 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); | |
710 | ||
711 | stats->rx_packets += rxpackets; | |
712 | stats->rx_bytes += rxbytes; | |
713 | stats->multicast += rxmulticast; | |
714 | stats->tx_packets += txpackets; | |
715 | stats->tx_bytes += txbytes; | |
716 | /* rx_errors & tx_dropped are u32 */ | |
717 | rx_errors += p->rx_errors; | |
718 | tx_dropped += p->tx_dropped; | |
9793241f | 719 | } |
5a4ae5f6 LR |
720 | stats->rx_errors = rx_errors; |
721 | stats->tx_dropped = tx_dropped; | |
722 | ||
9793241f ED |
723 | return stats; |
724 | } | |
725 | ||
6d4cdf47 | 726 | #ifdef CONFIG_NET_POLL_CONTROLLER |
de93cb2e | 727 | static void vlan_dev_poll_controller(struct net_device *dev) |
6d4cdf47 BL |
728 | { |
729 | return; | |
730 | } | |
731 | ||
a8779ec1 | 732 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) |
6d4cdf47 | 733 | { |
f3da3893 AW |
734 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
735 | struct net_device *real_dev = vlan->real_dev; | |
6d4cdf47 BL |
736 | struct netpoll *netpoll; |
737 | int err = 0; | |
738 | ||
a8779ec1 | 739 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); |
6d4cdf47 BL |
740 | err = -ENOMEM; |
741 | if (!netpoll) | |
742 | goto out; | |
743 | ||
a8779ec1 | 744 | err = __netpoll_setup(netpoll, real_dev); |
6d4cdf47 BL |
745 | if (err) { |
746 | kfree(netpoll); | |
747 | goto out; | |
748 | } | |
749 | ||
f3da3893 | 750 | vlan->netpoll = netpoll; |
6d4cdf47 BL |
751 | |
752 | out: | |
753 | return err; | |
754 | } | |
755 | ||
de93cb2e | 756 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
6d4cdf47 | 757 | { |
f3da3893 AW |
758 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
759 | struct netpoll *netpoll = vlan->netpoll; | |
6d4cdf47 BL |
760 | |
761 | if (!netpoll) | |
762 | return; | |
763 | ||
f3da3893 | 764 | vlan->netpoll = NULL; |
6d4cdf47 | 765 | |
2cde6acd | 766 | __netpoll_free_async(netpoll); |
6d4cdf47 BL |
767 | } |
768 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
769 | ||
75b8846a | 770 | static const struct ethtool_ops vlan_ethtool_ops = { |
b3020061 SH |
771 | .get_settings = vlan_ethtool_get_settings, |
772 | .get_drvinfo = vlan_ethtool_get_drvinfo, | |
75b8846a | 773 | .get_link = ethtool_op_get_link, |
37dd9255 | 774 | .get_ts_info = vlan_ethtool_get_ts_info, |
75b8846a PM |
775 | }; |
776 | ||
656299f7 SH |
777 | static const struct net_device_ops vlan_netdev_ops = { |
778 | .ndo_change_mtu = vlan_dev_change_mtu, | |
779 | .ndo_init = vlan_dev_init, | |
780 | .ndo_uninit = vlan_dev_uninit, | |
781 | .ndo_open = vlan_dev_open, | |
782 | .ndo_stop = vlan_dev_stop, | |
669d3e0b VD |
783 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
784 | .ndo_validate_addr = eth_validate_addr, | |
785 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
786 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
669d3e0b VD |
787 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
788 | .ndo_do_ioctl = vlan_dev_ioctl, | |
789 | .ndo_neigh_setup = vlan_dev_neigh_setup, | |
9618e2ff | 790 | .ndo_get_stats64 = vlan_dev_get_stats64, |
f4d5392e | 791 | #if IS_ENABLED(CONFIG_FCOE) |
669d3e0b VD |
792 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
793 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
794 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, | |
795 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
796 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, | |
4ea09c9c | 797 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
6d4cdf47 BL |
798 | #endif |
799 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
800 | .ndo_poll_controller = vlan_dev_poll_controller, | |
801 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, | |
802 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, | |
669d3e0b | 803 | #endif |
8a0427bb | 804 | .ndo_fix_features = vlan_dev_fix_features, |
d38569ab | 805 | .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, |
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; | |
814 | free_netdev(dev); | |
815 | } | |
816 | ||
ef3eb3e5 PM |
817 | void vlan_setup(struct net_device *dev) |
818 | { | |
819 | ether_setup(dev); | |
820 | ||
821 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
02875878 ED |
822 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
823 | netif_keep_dst(dev); | |
ef3eb3e5 PM |
824 | dev->tx_queue_len = 0; |
825 | ||
656299f7 | 826 | dev->netdev_ops = &vlan_netdev_ops; |
a48e5faf | 827 | dev->destructor = vlan_dev_free; |
75b8846a | 828 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
829 | |
830 | memset(dev->broadcast, 0, ETH_ALEN); | |
831 | } |