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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> | |
29 | #include <linux/etherdevice.h> | |
75b8846a | 30 | #include <linux/ethtool.h> |
1da177e4 LT |
31 | #include <net/arp.h> |
32 | ||
33 | #include "vlan.h" | |
34 | #include "vlanproc.h" | |
35 | #include <linux/if_vlan.h> | |
6d4cdf47 | 36 | #include <linux/netpoll.h> |
1da177e4 LT |
37 | |
38 | /* | |
39 | * Rebuild the Ethernet MAC header. This is called after an ARP | |
40 | * (or in future other address resolution) has completed on this | |
41 | * sk_buff. We now let ARP fill in the other fields. | |
42 | * | |
43 | * This routine CANNOT use cached dst->neigh! | |
44 | * Really, it is used only when dst->neigh is wrong. | |
45 | * | |
46 | * TODO: This needs a checkup, I'm ignorant here. --BLG | |
47 | */ | |
ef3eb3e5 | 48 | static int vlan_dev_rebuild_header(struct sk_buff *skb) |
1da177e4 LT |
49 | { |
50 | struct net_device *dev = skb->dev; | |
51 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); | |
52 | ||
53 | switch (veth->h_vlan_encapsulated_proto) { | |
54 | #ifdef CONFIG_INET | |
60678040 | 55 | case htons(ETH_P_IP): |
1da177e4 LT |
56 | |
57 | /* TODO: Confirm this will work with VLAN headers... */ | |
58 | return arp_find(veth->h_dest, skb); | |
122952fc | 59 | #endif |
1da177e4 | 60 | default: |
afab2d29 | 61 | pr_debug("%s: unable to resolve type %X addresses\n", |
40f98e1a | 62 | dev->name, ntohs(veth->h_vlan_encapsulated_proto)); |
122952fc | 63 | |
07fc67be | 64 | ether_addr_copy(veth->h_source, dev->dev_addr); |
1da177e4 | 65 | break; |
3ff50b79 | 66 | } |
1da177e4 LT |
67 | |
68 | return 0; | |
69 | } | |
70 | ||
1da177e4 | 71 | /* |
122952fc | 72 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
73 | * |
74 | * saddr=NULL means use device source address | |
75 | * daddr=NULL means leave destination address (eg unresolved arp) | |
76 | * | |
77 | * This is called when the SKB is moving down the stack towards the | |
78 | * physical devices. | |
79 | */ | |
ef3eb3e5 PM |
80 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
81 | unsigned short type, | |
82 | const void *daddr, const void *saddr, | |
83 | unsigned int len) | |
1da177e4 | 84 | { |
1fd9b1fc | 85 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 86 | struct vlan_hdr *vhdr; |
1349fe9a | 87 | unsigned int vhdrlen = 0; |
9bb8582e | 88 | u16 vlan_tci = 0; |
1349fe9a | 89 | int rc; |
1da177e4 | 90 | |
0c0667a8 | 91 | if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { |
1da177e4 LT |
92 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
93 | ||
0c0667a8 | 94 | vlan_tci = vlan->vlan_id; |
e267cb96 | 95 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
9bb8582e | 96 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
97 | |
98 | /* | |
bf9ae538 OP |
99 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
100 | * put the length in here instead. | |
1da177e4 | 101 | */ |
bf9ae538 | 102 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
1da177e4 | 103 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 104 | else |
1da177e4 | 105 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a | 106 | |
1fd9b1fc PM |
107 | skb->protocol = vlan->vlan_proto; |
108 | type = ntohs(vlan->vlan_proto); | |
1349fe9a | 109 | vhdrlen = VLAN_HLEN; |
1da177e4 LT |
110 | } |
111 | ||
112 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
113 | if (saddr == NULL) | |
114 | saddr = dev->dev_addr; | |
115 | ||
1349fe9a | 116 | /* Now make the underlying real hard header */ |
0c0667a8 | 117 | dev = vlan->real_dev; |
1349fe9a PM |
118 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
119 | if (rc > 0) | |
120 | rc += vhdrlen; | |
1da177e4 LT |
121 | return rc; |
122 | } | |
123 | ||
6eacf8ad AW |
124 | static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) |
125 | { | |
126 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
127 | if (vlan->netpoll) | |
128 | netpoll_send_skb(vlan->netpoll, skb); | |
129 | #else | |
130 | BUG(); | |
131 | #endif | |
132 | return NETDEV_TX_OK; | |
133 | } | |
134 | ||
6fef4c0c SH |
135 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
136 | struct net_device *dev) | |
1da177e4 | 137 | { |
6eacf8ad | 138 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 139 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
1a123a31 ED |
140 | unsigned int len; |
141 | int ret; | |
55b01e86 | 142 | |
1da177e4 LT |
143 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
144 | * | |
145 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
146 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
147 | */ | |
1fd9b1fc | 148 | if (veth->h_vlan_proto != vlan->vlan_proto || |
6eacf8ad | 149 | vlan->flags & VLAN_FLAG_REORDER_HDR) { |
9bb8582e | 150 | u16 vlan_tci; |
6eacf8ad | 151 | vlan_tci = vlan->vlan_id; |
e267cb96 | 152 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
86a9bad3 | 153 | skb = __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); |
1da177e4 LT |
154 | } |
155 | ||
6eacf8ad | 156 | skb->dev = vlan->real_dev; |
1a123a31 | 157 | len = skb->len; |
6eacf8ad AW |
158 | if (unlikely(netpoll_tx_running(dev))) |
159 | return vlan_netpoll_send_skb(vlan, skb); | |
160 | ||
1a123a31 ED |
161 | ret = dev_queue_xmit(skb); |
162 | ||
2d6c9ffc | 163 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
4af429d2 ED |
164 | struct vlan_pcpu_stats *stats; |
165 | ||
6eacf8ad | 166 | stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
4af429d2 ED |
167 | u64_stats_update_begin(&stats->syncp); |
168 | stats->tx_packets++; | |
169 | stats->tx_bytes += len; | |
307f73df | 170 | u64_stats_update_end(&stats->syncp); |
4af429d2 | 171 | } else { |
6eacf8ad | 172 | this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
4af429d2 | 173 | } |
1a123a31 | 174 | |
cbbef5e1 | 175 | return ret; |
1da177e4 LT |
176 | } |
177 | ||
ef3eb3e5 | 178 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
179 | { |
180 | /* TODO: gotta make sure the underlying layer can handle it, | |
181 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
182 | */ | |
7da82c06 | 183 | if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
184 | return -ERANGE; |
185 | ||
186 | dev->mtu = new_mtu; | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
c17d8874 | 191 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 192 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 193 | { |
7da82c06 | 194 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b020cb48 PM |
195 | |
196 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
197 | vlan->nr_ingress_mappings--; | |
198 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
199 | vlan->nr_ingress_mappings++; | |
200 | ||
201 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
202 | } |
203 | ||
c17d8874 | 204 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 205 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 206 | { |
7da82c06 | 207 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 LT |
208 | struct vlan_priority_tci_mapping *mp = NULL; |
209 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 210 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 211 | |
c17d8874 | 212 | /* See if a priority mapping exists.. */ |
b020cb48 | 213 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
214 | while (mp) { |
215 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
216 | if (mp->vlan_qos && !vlan_qos) |
217 | vlan->nr_egress_mappings--; | |
218 | else if (!mp->vlan_qos && vlan_qos) | |
219 | vlan->nr_egress_mappings++; | |
220 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 221 | return 0; |
1da177e4 | 222 | } |
c17d8874 | 223 | mp = mp->next; |
1da177e4 | 224 | } |
c17d8874 PM |
225 | |
226 | /* Create a new mapping then. */ | |
b020cb48 | 227 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
228 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
229 | if (!np) | |
230 | return -ENOBUFS; | |
231 | ||
232 | np->next = mp; | |
233 | np->priority = skb_prio; | |
b020cb48 | 234 | np->vlan_qos = vlan_qos; |
3e3aac49 ED |
235 | /* Before inserting this element in hash table, make sure all its fields |
236 | * are committed to memory. | |
e267cb96 | 237 | * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() |
3e3aac49 ED |
238 | */ |
239 | smp_wmb(); | |
b020cb48 PM |
240 | vlan->egress_priority_map[skb_prio & 0xF] = np; |
241 | if (vlan_qos) | |
242 | vlan->nr_egress_mappings++; | |
c17d8874 | 243 | return 0; |
1da177e4 LT |
244 | } |
245 | ||
a4bf3af4 | 246 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 247 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 248 | { |
7da82c06 | 249 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b3ce0325 PM |
250 | u32 old_flags = vlan->flags; |
251 | ||
5e756593 | 252 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
86fbe9bb | 253 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) |
b3ce0325 PM |
254 | return -EINVAL; |
255 | ||
256 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
257 | |
258 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
259 | if (vlan->flags & VLAN_FLAG_GVRP) | |
260 | vlan_gvrp_request_join(dev); | |
261 | else | |
262 | vlan_gvrp_request_leave(dev); | |
263 | } | |
86fbe9bb DW |
264 | |
265 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { | |
266 | if (vlan->flags & VLAN_FLAG_MVRP) | |
267 | vlan_mvrp_request_join(dev); | |
268 | else | |
269 | vlan_mvrp_request_leave(dev); | |
270 | } | |
b3ce0325 | 271 | return 0; |
1da177e4 LT |
272 | } |
273 | ||
c17d8874 | 274 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 275 | { |
7da82c06 | 276 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
1da177e4 LT |
277 | } |
278 | ||
ef3eb3e5 | 279 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 280 | { |
7da82c06 | 281 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
8c979c26 PM |
282 | struct net_device *real_dev = vlan->real_dev; |
283 | int err; | |
284 | ||
5e756593 PM |
285 | if (!(real_dev->flags & IFF_UP) && |
286 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
287 | return -ENETDOWN; |
288 | ||
53a2b3a1 | 289 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { |
a748ee24 | 290 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 291 | if (err < 0) |
89146504 | 292 | goto out; |
8c979c26 | 293 | } |
8c979c26 | 294 | |
89146504 WC |
295 | if (dev->flags & IFF_ALLMULTI) { |
296 | err = dev_set_allmulti(real_dev, 1); | |
297 | if (err < 0) | |
298 | goto del_unicast; | |
299 | } | |
300 | if (dev->flags & IFF_PROMISC) { | |
301 | err = dev_set_promiscuity(real_dev, 1); | |
302 | if (err < 0) | |
303 | goto clear_allmulti; | |
304 | } | |
305 | ||
07fc67be | 306 | ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); |
6c78dcbd | 307 | |
70c03b49 PM |
308 | if (vlan->flags & VLAN_FLAG_GVRP) |
309 | vlan_gvrp_request_join(dev); | |
310 | ||
86fbe9bb DW |
311 | if (vlan->flags & VLAN_FLAG_MVRP) |
312 | vlan_mvrp_request_join(dev); | |
313 | ||
0ac820ee PO |
314 | if (netif_carrier_ok(real_dev)) |
315 | netif_carrier_on(dev); | |
1da177e4 | 316 | return 0; |
89146504 WC |
317 | |
318 | clear_allmulti: | |
319 | if (dev->flags & IFF_ALLMULTI) | |
320 | dev_set_allmulti(real_dev, -1); | |
321 | del_unicast: | |
53a2b3a1 | 322 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 323 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 324 | out: |
adc667e8 | 325 | netif_carrier_off(dev); |
89146504 | 326 | return err; |
1da177e4 LT |
327 | } |
328 | ||
ef3eb3e5 | 329 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 330 | { |
7da82c06 | 331 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
70c03b49 PM |
332 | struct net_device *real_dev = vlan->real_dev; |
333 | ||
56addd6e | 334 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 335 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
336 | if (dev->flags & IFF_ALLMULTI) |
337 | dev_set_allmulti(real_dev, -1); | |
338 | if (dev->flags & IFF_PROMISC) | |
339 | dev_set_promiscuity(real_dev, -1); | |
340 | ||
53a2b3a1 | 341 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 342 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 343 | |
adc667e8 | 344 | netif_carrier_off(dev); |
1da177e4 LT |
345 | return 0; |
346 | } | |
347 | ||
ef3eb3e5 | 348 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 349 | { |
7da82c06 | 350 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
39aaac11 PM |
351 | struct sockaddr *addr = p; |
352 | int err; | |
353 | ||
354 | if (!is_valid_ether_addr(addr->sa_data)) | |
355 | return -EADDRNOTAVAIL; | |
356 | ||
357 | if (!(dev->flags & IFF_UP)) | |
358 | goto out; | |
359 | ||
53a2b3a1 | 360 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
a748ee24 | 361 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
362 | if (err < 0) |
363 | return err; | |
364 | } | |
365 | ||
53a2b3a1 | 366 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 367 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
368 | |
369 | out: | |
07fc67be | 370 | ether_addr_copy(dev->dev_addr, addr->sa_data); |
39aaac11 PM |
371 | return 0; |
372 | } | |
373 | ||
ef3eb3e5 | 374 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 375 | { |
7da82c06 | 376 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
656299f7 | 377 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
378 | struct ifreq ifrr; |
379 | int err = -EOPNOTSUPP; | |
380 | ||
381 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
382 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
383 | ||
2029cc2c | 384 | switch (cmd) { |
1da177e4 LT |
385 | case SIOCGMIIPHY: |
386 | case SIOCGMIIREG: | |
387 | case SIOCSMIIREG: | |
656299f7 SH |
388 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
389 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 390 | break; |
1da177e4 LT |
391 | } |
392 | ||
122952fc | 393 | if (!err) |
1da177e4 LT |
394 | ifr->ifr_ifru = ifrr.ifr_ifru; |
395 | ||
396 | return err; | |
397 | } | |
398 | ||
cc883d16 FB |
399 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
400 | { | |
7da82c06 | 401 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
cc883d16 FB |
402 | const struct net_device_ops *ops = real_dev->netdev_ops; |
403 | int err = 0; | |
404 | ||
405 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 406 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
407 | |
408 | return err; | |
409 | } | |
410 | ||
f4d5392e | 411 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
412 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
413 | struct scatterlist *sgl, unsigned int sgc) | |
414 | { | |
7da82c06 | 415 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
416 | const struct net_device_ops *ops = real_dev->netdev_ops; |
417 | int rc = 0; | |
418 | ||
419 | if (ops->ndo_fcoe_ddp_setup) | |
420 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
421 | ||
422 | return rc; | |
423 | } | |
424 | ||
425 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
426 | { | |
7da82c06 | 427 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
428 | const struct net_device_ops *ops = real_dev->netdev_ops; |
429 | int len = 0; | |
430 | ||
431 | if (ops->ndo_fcoe_ddp_done) | |
432 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
433 | ||
434 | return len; | |
435 | } | |
0af46d99 YZ |
436 | |
437 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
438 | { | |
7da82c06 | 439 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
440 | const struct net_device_ops *ops = real_dev->netdev_ops; |
441 | int rc = -EINVAL; | |
442 | ||
443 | if (ops->ndo_fcoe_enable) | |
444 | rc = ops->ndo_fcoe_enable(real_dev); | |
445 | return rc; | |
446 | } | |
447 | ||
448 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
449 | { | |
7da82c06 | 450 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
451 | const struct net_device_ops *ops = real_dev->netdev_ops; |
452 | int rc = -EINVAL; | |
453 | ||
454 | if (ops->ndo_fcoe_disable) | |
455 | rc = ops->ndo_fcoe_disable(real_dev); | |
456 | return rc; | |
457 | } | |
d6534799 YZ |
458 | |
459 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
460 | { | |
7da82c06 | 461 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
d6534799 YZ |
462 | const struct net_device_ops *ops = real_dev->netdev_ops; |
463 | int rc = -EINVAL; | |
464 | ||
465 | if (ops->ndo_fcoe_get_wwn) | |
466 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); | |
467 | return rc; | |
468 | } | |
4ea09c9c YZ |
469 | |
470 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, | |
471 | struct scatterlist *sgl, unsigned int sgc) | |
472 | { | |
7da82c06 | 473 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
4ea09c9c YZ |
474 | const struct net_device_ops *ops = real_dev->netdev_ops; |
475 | int rc = 0; | |
476 | ||
477 | if (ops->ndo_fcoe_ddp_target) | |
478 | rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); | |
479 | ||
480 | return rc; | |
481 | } | |
b85daa53 VD |
482 | #endif |
483 | ||
ef3eb3e5 | 484 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 485 | { |
7da82c06 | 486 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
6c78dcbd | 487 | |
deede2fa MK |
488 | if (dev->flags & IFF_UP) { |
489 | if (change & IFF_ALLMULTI) | |
490 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
491 | if (change & IFF_PROMISC) | |
492 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
493 | } | |
6c78dcbd PM |
494 | } |
495 | ||
e83a2ea8 | 496 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 497 | { |
d38569ab VY |
498 | dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
499 | dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); | |
1da177e4 | 500 | } |
ef3eb3e5 PM |
501 | |
502 | /* | |
503 | * vlan network devices have devices nesting below it, and are a special | |
504 | * "super class" of normal network devices; split their locks off into a | |
505 | * separate class since they always nest. | |
506 | */ | |
507 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 508 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 509 | |
e8a0464c DM |
510 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
511 | struct netdev_queue *txq, | |
512 | void *_subclass) | |
c773e847 DM |
513 | { |
514 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
515 | &vlan_netdev_xmit_lock_key, |
516 | *(int *)_subclass); | |
c773e847 DM |
517 | } |
518 | ||
519 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
520 | { | |
cf508b12 DM |
521 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
522 | &vlan_netdev_addr_lock_key, | |
523 | subclass); | |
e8a0464c | 524 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
525 | } |
526 | ||
d38569ab VY |
527 | static int vlan_dev_get_lock_subclass(struct net_device *dev) |
528 | { | |
529 | return vlan_dev_priv(dev)->nest_level; | |
530 | } | |
531 | ||
ef3eb3e5 PM |
532 | static const struct header_ops vlan_header_ops = { |
533 | .create = vlan_dev_hard_header, | |
534 | .rebuild = vlan_dev_rebuild_header, | |
535 | .parse = eth_header_parse, | |
536 | }; | |
537 | ||
2205369a DM |
538 | static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, |
539 | unsigned short type, | |
540 | const void *daddr, const void *saddr, | |
541 | unsigned int len) | |
542 | { | |
543 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
544 | struct net_device *real_dev = vlan->real_dev; | |
545 | ||
dd38743b PB |
546 | if (saddr == NULL) |
547 | saddr = dev->dev_addr; | |
548 | ||
2205369a DM |
549 | return dev_hard_header(skb, real_dev, type, daddr, saddr, len); |
550 | } | |
551 | ||
552 | static const struct header_ops vlan_passthru_header_ops = { | |
553 | .create = vlan_passthru_hard_header, | |
554 | .rebuild = dev_rebuild_header, | |
555 | .parse = eth_header_parse, | |
556 | }; | |
557 | ||
e949b09b DG |
558 | static struct device_type vlan_type = { |
559 | .name = "vlan", | |
560 | }; | |
561 | ||
213b15ca | 562 | static const struct net_device_ops vlan_netdev_ops; |
f7d1b9f5 | 563 | |
ef3eb3e5 PM |
564 | static int vlan_dev_init(struct net_device *dev) |
565 | { | |
7da82c06 | 566 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
ef3eb3e5 | 567 | |
adc667e8 JV |
568 | netif_carrier_off(dev); |
569 | ||
ef3eb3e5 | 570 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
194dbcc8 JF |
571 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
572 | IFF_MASTER | IFF_SLAVE); | |
ef3eb3e5 PM |
573 | dev->iflink = real_dev->ifindex; |
574 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
575 | (1<<__LINK_STATE_DORMANT))) | | |
576 | (1<<__LINK_STATE_PRESENT); | |
577 | ||
62f2a3a4 MM |
578 | dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | |
579 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | | |
580 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | | |
581 | NETIF_F_ALL_FCOE; | |
582 | ||
8a0427bb | 583 | dev->features |= real_dev->vlan_features | NETIF_F_LLTX; |
1ae4be22 | 584 | dev->gso_max_size = real_dev->gso_max_size; |
2adb956b VY |
585 | if (dev->features & NETIF_F_VLAN_FEATURES) |
586 | netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); | |
587 | ||
5fb13570 | 588 | |
ef3eb3e5 PM |
589 | /* ipv6 shared card related stuff */ |
590 | dev->dev_id = real_dev->dev_id; | |
591 | ||
592 | if (is_zero_ether_addr(dev->dev_addr)) | |
6b93f4a1 | 593 | eth_hw_addr_inherit(dev, real_dev); |
ef3eb3e5 PM |
594 | if (is_zero_ether_addr(dev->broadcast)) |
595 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
596 | ||
f4d5392e | 597 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
598 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
599 | #endif | |
600 | ||
d870bfb9 | 601 | dev->needed_headroom = real_dev->needed_headroom; |
fc0d48b8 VY |
602 | if (vlan_hw_offload_capable(real_dev->features, |
603 | vlan_dev_priv(dev)->vlan_proto)) { | |
2205369a | 604 | dev->header_ops = &vlan_passthru_header_ops; |
ef3eb3e5 | 605 | dev->hard_header_len = real_dev->hard_header_len; |
ef3eb3e5 PM |
606 | } else { |
607 | dev->header_ops = &vlan_header_ops; | |
608 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
ef3eb3e5 PM |
609 | } |
610 | ||
213b15ca | 611 | dev->netdev_ops = &vlan_netdev_ops; |
636e19a3 | 612 | |
e949b09b DG |
613 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
614 | ||
d38569ab | 615 | vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); |
9793241f | 616 | |
1c213bd2 | 617 | vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
7da82c06 | 618 | if (!vlan_dev_priv(dev)->vlan_pcpu_stats) |
9793241f ED |
619 | return -ENOMEM; |
620 | ||
ef3eb3e5 PM |
621 | return 0; |
622 | } | |
623 | ||
23556323 PE |
624 | static void vlan_dev_uninit(struct net_device *dev) |
625 | { | |
626 | struct vlan_priority_tci_mapping *pm; | |
7da82c06 | 627 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
23556323 PE |
628 | int i; |
629 | ||
4af429d2 ED |
630 | free_percpu(vlan->vlan_pcpu_stats); |
631 | vlan->vlan_pcpu_stats = NULL; | |
23556323 PE |
632 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { |
633 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
634 | vlan->egress_priority_map[i] = pm->next; | |
635 | kfree(pm); | |
636 | } | |
637 | } | |
638 | } | |
639 | ||
c8f44aff MM |
640 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
641 | netdev_features_t features) | |
8a0427bb | 642 | { |
7da82c06 | 643 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b29d3145 | 644 | netdev_features_t old_features = features; |
8a0427bb | 645 | |
f0a619cc | 646 | features &= real_dev->vlan_features; |
bc5787c6 MM |
647 | features |= NETIF_F_RXCSUM; |
648 | features &= real_dev->features; | |
712ae51a | 649 | |
6c9c1b54 | 650 | features |= old_features & NETIF_F_SOFT_FEATURES; |
f0a619cc | 651 | features |= NETIF_F_LLTX; |
8a0427bb MM |
652 | |
653 | return features; | |
654 | } | |
655 | ||
b3020061 SH |
656 | static int vlan_ethtool_get_settings(struct net_device *dev, |
657 | struct ethtool_cmd *cmd) | |
658 | { | |
7da82c06 | 659 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
4bc71cb9 JP |
660 | |
661 | return __ethtool_get_settings(vlan->real_dev, cmd); | |
b3020061 SH |
662 | } |
663 | ||
664 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
665 | struct ethtool_drvinfo *info) | |
666 | { | |
7826d43f JP |
667 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
668 | strlcpy(info->version, vlan_version, sizeof(info->version)); | |
669 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
b3020061 SH |
670 | } |
671 | ||
28172739 | 672 | static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
9793241f | 673 | { |
9793241f | 674 | |
7da82c06 | 675 | if (vlan_dev_priv(dev)->vlan_pcpu_stats) { |
4af429d2 ED |
676 | struct vlan_pcpu_stats *p; |
677 | u32 rx_errors = 0, tx_dropped = 0; | |
9793241f ED |
678 | int i; |
679 | ||
680 | for_each_possible_cpu(i) { | |
4af429d2 | 681 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; |
9618e2ff ED |
682 | unsigned int start; |
683 | ||
7da82c06 | 684 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); |
9618e2ff | 685 | do { |
57a7744e | 686 | start = u64_stats_fetch_begin_irq(&p->syncp); |
9618e2ff ED |
687 | rxpackets = p->rx_packets; |
688 | rxbytes = p->rx_bytes; | |
689 | rxmulticast = p->rx_multicast; | |
4af429d2 ED |
690 | txpackets = p->tx_packets; |
691 | txbytes = p->tx_bytes; | |
57a7744e | 692 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
4af429d2 ED |
693 | |
694 | stats->rx_packets += rxpackets; | |
695 | stats->rx_bytes += rxbytes; | |
696 | stats->multicast += rxmulticast; | |
697 | stats->tx_packets += txpackets; | |
698 | stats->tx_bytes += txbytes; | |
699 | /* rx_errors & tx_dropped are u32 */ | |
700 | rx_errors += p->rx_errors; | |
701 | tx_dropped += p->tx_dropped; | |
9793241f | 702 | } |
4af429d2 ED |
703 | stats->rx_errors = rx_errors; |
704 | stats->tx_dropped = tx_dropped; | |
9793241f ED |
705 | } |
706 | return stats; | |
707 | } | |
708 | ||
6d4cdf47 | 709 | #ifdef CONFIG_NET_POLL_CONTROLLER |
de93cb2e | 710 | static void vlan_dev_poll_controller(struct net_device *dev) |
6d4cdf47 BL |
711 | { |
712 | return; | |
713 | } | |
714 | ||
a8779ec1 | 715 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) |
6d4cdf47 | 716 | { |
f3da3893 AW |
717 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
718 | struct net_device *real_dev = vlan->real_dev; | |
6d4cdf47 BL |
719 | struct netpoll *netpoll; |
720 | int err = 0; | |
721 | ||
a8779ec1 | 722 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); |
6d4cdf47 BL |
723 | err = -ENOMEM; |
724 | if (!netpoll) | |
725 | goto out; | |
726 | ||
a8779ec1 | 727 | err = __netpoll_setup(netpoll, real_dev); |
6d4cdf47 BL |
728 | if (err) { |
729 | kfree(netpoll); | |
730 | goto out; | |
731 | } | |
732 | ||
f3da3893 | 733 | vlan->netpoll = netpoll; |
6d4cdf47 BL |
734 | |
735 | out: | |
736 | return err; | |
737 | } | |
738 | ||
de93cb2e | 739 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
6d4cdf47 | 740 | { |
f3da3893 AW |
741 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
742 | struct netpoll *netpoll = vlan->netpoll; | |
6d4cdf47 BL |
743 | |
744 | if (!netpoll) | |
745 | return; | |
746 | ||
f3da3893 | 747 | vlan->netpoll = NULL; |
6d4cdf47 | 748 | |
2cde6acd | 749 | __netpoll_free_async(netpoll); |
6d4cdf47 BL |
750 | } |
751 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
752 | ||
75b8846a | 753 | static const struct ethtool_ops vlan_ethtool_ops = { |
b3020061 SH |
754 | .get_settings = vlan_ethtool_get_settings, |
755 | .get_drvinfo = vlan_ethtool_get_drvinfo, | |
75b8846a | 756 | .get_link = ethtool_op_get_link, |
75b8846a PM |
757 | }; |
758 | ||
656299f7 SH |
759 | static const struct net_device_ops vlan_netdev_ops = { |
760 | .ndo_change_mtu = vlan_dev_change_mtu, | |
761 | .ndo_init = vlan_dev_init, | |
762 | .ndo_uninit = vlan_dev_uninit, | |
763 | .ndo_open = vlan_dev_open, | |
764 | .ndo_stop = vlan_dev_stop, | |
669d3e0b VD |
765 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
766 | .ndo_validate_addr = eth_validate_addr, | |
767 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
768 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
669d3e0b VD |
769 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
770 | .ndo_do_ioctl = vlan_dev_ioctl, | |
771 | .ndo_neigh_setup = vlan_dev_neigh_setup, | |
9618e2ff | 772 | .ndo_get_stats64 = vlan_dev_get_stats64, |
f4d5392e | 773 | #if IS_ENABLED(CONFIG_FCOE) |
669d3e0b VD |
774 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
775 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
776 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, | |
777 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
778 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, | |
4ea09c9c | 779 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
6d4cdf47 BL |
780 | #endif |
781 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
782 | .ndo_poll_controller = vlan_dev_poll_controller, | |
783 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, | |
784 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, | |
669d3e0b | 785 | #endif |
8a0427bb | 786 | .ndo_fix_features = vlan_dev_fix_features, |
d38569ab | 787 | .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, |
669d3e0b VD |
788 | }; |
789 | ||
ef3eb3e5 PM |
790 | void vlan_setup(struct net_device *dev) |
791 | { | |
792 | ether_setup(dev); | |
793 | ||
794 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
550fd08c | 795 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
ef3eb3e5 PM |
796 | dev->tx_queue_len = 0; |
797 | ||
656299f7 | 798 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 | 799 | dev->destructor = free_netdev; |
75b8846a | 800 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
801 | |
802 | memset(dev->broadcast, 0, ETH_ALEN); | |
803 | } |