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> | |
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 | |
1da177e4 LT |
64 | memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); |
65 | break; | |
3ff50b79 | 66 | } |
1da177e4 LT |
67 | |
68 | return 0; | |
69 | } | |
70 | ||
9bb8582e | 71 | static inline u16 |
2029cc2c | 72 | vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) |
1da177e4 | 73 | { |
2029cc2c | 74 | struct vlan_priority_tci_mapping *mp; |
1da177e4 | 75 | |
7da82c06 | 76 | mp = vlan_dev_priv(dev)->egress_priority_map[(skb->priority & 0xF)]; |
1da177e4 LT |
77 | while (mp) { |
78 | if (mp->priority == skb->priority) { | |
2029cc2c PM |
79 | return mp->vlan_qos; /* This should already be shifted |
80 | * to mask correctly with the | |
81 | * VLAN's TCI */ | |
1da177e4 LT |
82 | } |
83 | mp = mp->next; | |
84 | } | |
85 | return 0; | |
86 | } | |
87 | ||
88 | /* | |
122952fc | 89 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
90 | * |
91 | * saddr=NULL means use device source address | |
92 | * daddr=NULL means leave destination address (eg unresolved arp) | |
93 | * | |
94 | * This is called when the SKB is moving down the stack towards the | |
95 | * physical devices. | |
96 | */ | |
ef3eb3e5 PM |
97 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
98 | unsigned short type, | |
99 | const void *daddr, const void *saddr, | |
100 | unsigned int len) | |
1da177e4 | 101 | { |
1fd9b1fc | 102 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 103 | struct vlan_hdr *vhdr; |
1349fe9a | 104 | unsigned int vhdrlen = 0; |
9bb8582e | 105 | u16 vlan_tci = 0; |
1349fe9a | 106 | int rc; |
1da177e4 | 107 | |
7da82c06 | 108 | if (!(vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR)) { |
1da177e4 LT |
109 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
110 | ||
7da82c06 | 111 | vlan_tci = vlan_dev_priv(dev)->vlan_id; |
9bb8582e | 112 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); |
9bb8582e | 113 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
114 | |
115 | /* | |
bf9ae538 OP |
116 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
117 | * put the length in here instead. | |
1da177e4 | 118 | */ |
bf9ae538 | 119 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
1da177e4 | 120 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 121 | else |
1da177e4 | 122 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a | 123 | |
1fd9b1fc PM |
124 | skb->protocol = vlan->vlan_proto; |
125 | type = ntohs(vlan->vlan_proto); | |
1349fe9a | 126 | vhdrlen = VLAN_HLEN; |
1da177e4 LT |
127 | } |
128 | ||
129 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
130 | if (saddr == NULL) | |
131 | saddr = dev->dev_addr; | |
132 | ||
1349fe9a | 133 | /* Now make the underlying real hard header */ |
7da82c06 | 134 | dev = vlan_dev_priv(dev)->real_dev; |
1349fe9a PM |
135 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
136 | if (rc > 0) | |
137 | rc += vhdrlen; | |
1da177e4 LT |
138 | return rc; |
139 | } | |
140 | ||
6eacf8ad AW |
141 | static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) |
142 | { | |
143 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
144 | if (vlan->netpoll) | |
145 | netpoll_send_skb(vlan->netpoll, skb); | |
146 | #else | |
147 | BUG(); | |
148 | #endif | |
149 | return NETDEV_TX_OK; | |
150 | } | |
151 | ||
6fef4c0c SH |
152 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
153 | struct net_device *dev) | |
1da177e4 | 154 | { |
6eacf8ad | 155 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 156 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
1a123a31 ED |
157 | unsigned int len; |
158 | int ret; | |
55b01e86 | 159 | |
1da177e4 LT |
160 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
161 | * | |
162 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
163 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
164 | */ | |
1fd9b1fc | 165 | if (veth->h_vlan_proto != vlan->vlan_proto || |
6eacf8ad | 166 | vlan->flags & VLAN_FLAG_REORDER_HDR) { |
9bb8582e | 167 | u16 vlan_tci; |
6eacf8ad | 168 | vlan_tci = vlan->vlan_id; |
9bb8582e | 169 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); |
636e19a3 | 170 | skb = __vlan_hwaccel_put_tag(skb, vlan_tci); |
1da177e4 LT |
171 | } |
172 | ||
6eacf8ad | 173 | skb->dev = vlan->real_dev; |
1a123a31 | 174 | len = skb->len; |
6eacf8ad AW |
175 | if (unlikely(netpoll_tx_running(dev))) |
176 | return vlan_netpoll_send_skb(vlan, skb); | |
177 | ||
1a123a31 ED |
178 | ret = dev_queue_xmit(skb); |
179 | ||
2d6c9ffc | 180 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
4af429d2 ED |
181 | struct vlan_pcpu_stats *stats; |
182 | ||
6eacf8ad | 183 | stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
4af429d2 ED |
184 | u64_stats_update_begin(&stats->syncp); |
185 | stats->tx_packets++; | |
186 | stats->tx_bytes += len; | |
307f73df | 187 | u64_stats_update_end(&stats->syncp); |
4af429d2 | 188 | } else { |
6eacf8ad | 189 | this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
4af429d2 | 190 | } |
1a123a31 | 191 | |
cbbef5e1 | 192 | return ret; |
1da177e4 LT |
193 | } |
194 | ||
ef3eb3e5 | 195 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
196 | { |
197 | /* TODO: gotta make sure the underlying layer can handle it, | |
198 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
199 | */ | |
7da82c06 | 200 | if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
201 | return -ERANGE; |
202 | ||
203 | dev->mtu = new_mtu; | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
c17d8874 | 208 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 209 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 210 | { |
7da82c06 | 211 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b020cb48 PM |
212 | |
213 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
214 | vlan->nr_ingress_mappings--; | |
215 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
216 | vlan->nr_ingress_mappings++; | |
217 | ||
218 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
219 | } |
220 | ||
c17d8874 | 221 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 222 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 223 | { |
7da82c06 | 224 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 LT |
225 | struct vlan_priority_tci_mapping *mp = NULL; |
226 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 227 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 228 | |
c17d8874 | 229 | /* See if a priority mapping exists.. */ |
b020cb48 | 230 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
231 | while (mp) { |
232 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
233 | if (mp->vlan_qos && !vlan_qos) |
234 | vlan->nr_egress_mappings--; | |
235 | else if (!mp->vlan_qos && vlan_qos) | |
236 | vlan->nr_egress_mappings++; | |
237 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 238 | return 0; |
1da177e4 | 239 | } |
c17d8874 | 240 | mp = mp->next; |
1da177e4 | 241 | } |
c17d8874 PM |
242 | |
243 | /* Create a new mapping then. */ | |
b020cb48 | 244 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
245 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
246 | if (!np) | |
247 | return -ENOBUFS; | |
248 | ||
249 | np->next = mp; | |
250 | np->priority = skb_prio; | |
b020cb48 PM |
251 | np->vlan_qos = vlan_qos; |
252 | vlan->egress_priority_map[skb_prio & 0xF] = np; | |
253 | if (vlan_qos) | |
254 | vlan->nr_egress_mappings++; | |
c17d8874 | 255 | return 0; |
1da177e4 LT |
256 | } |
257 | ||
a4bf3af4 | 258 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 259 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 260 | { |
7da82c06 | 261 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b3ce0325 PM |
262 | u32 old_flags = vlan->flags; |
263 | ||
5e756593 | 264 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
86fbe9bb | 265 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) |
b3ce0325 PM |
266 | return -EINVAL; |
267 | ||
268 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
269 | |
270 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
271 | if (vlan->flags & VLAN_FLAG_GVRP) | |
272 | vlan_gvrp_request_join(dev); | |
273 | else | |
274 | vlan_gvrp_request_leave(dev); | |
275 | } | |
86fbe9bb DW |
276 | |
277 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { | |
278 | if (vlan->flags & VLAN_FLAG_MVRP) | |
279 | vlan_mvrp_request_join(dev); | |
280 | else | |
281 | vlan_mvrp_request_leave(dev); | |
282 | } | |
b3ce0325 | 283 | return 0; |
1da177e4 LT |
284 | } |
285 | ||
c17d8874 | 286 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 287 | { |
7da82c06 | 288 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
1da177e4 LT |
289 | } |
290 | ||
ef3eb3e5 | 291 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 292 | { |
7da82c06 | 293 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
8c979c26 PM |
294 | struct net_device *real_dev = vlan->real_dev; |
295 | int err; | |
296 | ||
5e756593 PM |
297 | if (!(real_dev->flags & IFF_UP) && |
298 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
299 | return -ENETDOWN; |
300 | ||
53a2b3a1 | 301 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { |
a748ee24 | 302 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 303 | if (err < 0) |
89146504 | 304 | goto out; |
8c979c26 | 305 | } |
8c979c26 | 306 | |
89146504 WC |
307 | if (dev->flags & IFF_ALLMULTI) { |
308 | err = dev_set_allmulti(real_dev, 1); | |
309 | if (err < 0) | |
310 | goto del_unicast; | |
311 | } | |
312 | if (dev->flags & IFF_PROMISC) { | |
313 | err = dev_set_promiscuity(real_dev, 1); | |
314 | if (err < 0) | |
315 | goto clear_allmulti; | |
316 | } | |
317 | ||
318 | memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); | |
6c78dcbd | 319 | |
70c03b49 PM |
320 | if (vlan->flags & VLAN_FLAG_GVRP) |
321 | vlan_gvrp_request_join(dev); | |
322 | ||
86fbe9bb DW |
323 | if (vlan->flags & VLAN_FLAG_MVRP) |
324 | vlan_mvrp_request_join(dev); | |
325 | ||
0ac820ee PO |
326 | if (netif_carrier_ok(real_dev)) |
327 | netif_carrier_on(dev); | |
1da177e4 | 328 | return 0; |
89146504 WC |
329 | |
330 | clear_allmulti: | |
331 | if (dev->flags & IFF_ALLMULTI) | |
332 | dev_set_allmulti(real_dev, -1); | |
333 | del_unicast: | |
53a2b3a1 | 334 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 335 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 336 | out: |
adc667e8 | 337 | netif_carrier_off(dev); |
89146504 | 338 | return err; |
1da177e4 LT |
339 | } |
340 | ||
ef3eb3e5 | 341 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 342 | { |
7da82c06 | 343 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
70c03b49 PM |
344 | struct net_device *real_dev = vlan->real_dev; |
345 | ||
56addd6e | 346 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 347 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
348 | if (dev->flags & IFF_ALLMULTI) |
349 | dev_set_allmulti(real_dev, -1); | |
350 | if (dev->flags & IFF_PROMISC) | |
351 | dev_set_promiscuity(real_dev, -1); | |
352 | ||
53a2b3a1 | 353 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 354 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 355 | |
adc667e8 | 356 | netif_carrier_off(dev); |
1da177e4 LT |
357 | return 0; |
358 | } | |
359 | ||
ef3eb3e5 | 360 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 361 | { |
7da82c06 | 362 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
39aaac11 PM |
363 | struct sockaddr *addr = p; |
364 | int err; | |
365 | ||
366 | if (!is_valid_ether_addr(addr->sa_data)) | |
367 | return -EADDRNOTAVAIL; | |
368 | ||
369 | if (!(dev->flags & IFF_UP)) | |
370 | goto out; | |
371 | ||
53a2b3a1 | 372 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
a748ee24 | 373 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
374 | if (err < 0) |
375 | return err; | |
376 | } | |
377 | ||
53a2b3a1 | 378 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 379 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
380 | |
381 | out: | |
382 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
383 | return 0; | |
384 | } | |
385 | ||
ef3eb3e5 | 386 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 387 | { |
7da82c06 | 388 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
656299f7 | 389 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
390 | struct ifreq ifrr; |
391 | int err = -EOPNOTSUPP; | |
392 | ||
393 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
394 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
395 | ||
2029cc2c | 396 | switch (cmd) { |
1da177e4 LT |
397 | case SIOCGMIIPHY: |
398 | case SIOCGMIIREG: | |
399 | case SIOCSMIIREG: | |
656299f7 SH |
400 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
401 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 402 | break; |
1da177e4 LT |
403 | } |
404 | ||
122952fc | 405 | if (!err) |
1da177e4 LT |
406 | ifr->ifr_ifru = ifrr.ifr_ifru; |
407 | ||
408 | return err; | |
409 | } | |
410 | ||
cc883d16 FB |
411 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
412 | { | |
7da82c06 | 413 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
cc883d16 FB |
414 | const struct net_device_ops *ops = real_dev->netdev_ops; |
415 | int err = 0; | |
416 | ||
417 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 418 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
419 | |
420 | return err; | |
421 | } | |
422 | ||
f4d5392e | 423 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
424 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
425 | struct scatterlist *sgl, unsigned int sgc) | |
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 rc = 0; | |
430 | ||
431 | if (ops->ndo_fcoe_ddp_setup) | |
432 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
433 | ||
434 | return rc; | |
435 | } | |
436 | ||
437 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
438 | { | |
7da82c06 | 439 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
440 | const struct net_device_ops *ops = real_dev->netdev_ops; |
441 | int len = 0; | |
442 | ||
443 | if (ops->ndo_fcoe_ddp_done) | |
444 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
445 | ||
446 | return len; | |
447 | } | |
0af46d99 YZ |
448 | |
449 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
450 | { | |
7da82c06 | 451 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
452 | const struct net_device_ops *ops = real_dev->netdev_ops; |
453 | int rc = -EINVAL; | |
454 | ||
455 | if (ops->ndo_fcoe_enable) | |
456 | rc = ops->ndo_fcoe_enable(real_dev); | |
457 | return rc; | |
458 | } | |
459 | ||
460 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
461 | { | |
7da82c06 | 462 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
463 | const struct net_device_ops *ops = real_dev->netdev_ops; |
464 | int rc = -EINVAL; | |
465 | ||
466 | if (ops->ndo_fcoe_disable) | |
467 | rc = ops->ndo_fcoe_disable(real_dev); | |
468 | return rc; | |
469 | } | |
d6534799 YZ |
470 | |
471 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
472 | { | |
7da82c06 | 473 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
d6534799 YZ |
474 | const struct net_device_ops *ops = real_dev->netdev_ops; |
475 | int rc = -EINVAL; | |
476 | ||
477 | if (ops->ndo_fcoe_get_wwn) | |
478 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); | |
479 | return rc; | |
480 | } | |
4ea09c9c YZ |
481 | |
482 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, | |
483 | struct scatterlist *sgl, unsigned int sgc) | |
484 | { | |
7da82c06 | 485 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
4ea09c9c YZ |
486 | const struct net_device_ops *ops = real_dev->netdev_ops; |
487 | int rc = 0; | |
488 | ||
489 | if (ops->ndo_fcoe_ddp_target) | |
490 | rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); | |
491 | ||
492 | return rc; | |
493 | } | |
b85daa53 VD |
494 | #endif |
495 | ||
ef3eb3e5 | 496 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 497 | { |
7da82c06 | 498 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
6c78dcbd | 499 | |
deede2fa MK |
500 | if (dev->flags & IFF_UP) { |
501 | if (change & IFF_ALLMULTI) | |
502 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
503 | if (change & IFF_PROMISC) | |
504 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
505 | } | |
6c78dcbd PM |
506 | } |
507 | ||
e83a2ea8 | 508 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 509 | { |
7da82c06 JP |
510 | dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
511 | dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); | |
1da177e4 | 512 | } |
ef3eb3e5 PM |
513 | |
514 | /* | |
515 | * vlan network devices have devices nesting below it, and are a special | |
516 | * "super class" of normal network devices; split their locks off into a | |
517 | * separate class since they always nest. | |
518 | */ | |
519 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 520 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 521 | |
e8a0464c DM |
522 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
523 | struct netdev_queue *txq, | |
524 | void *_subclass) | |
c773e847 DM |
525 | { |
526 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
527 | &vlan_netdev_xmit_lock_key, |
528 | *(int *)_subclass); | |
c773e847 DM |
529 | } |
530 | ||
531 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
532 | { | |
cf508b12 DM |
533 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
534 | &vlan_netdev_addr_lock_key, | |
535 | subclass); | |
e8a0464c | 536 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
537 | } |
538 | ||
ef3eb3e5 PM |
539 | static const struct header_ops vlan_header_ops = { |
540 | .create = vlan_dev_hard_header, | |
541 | .rebuild = vlan_dev_rebuild_header, | |
542 | .parse = eth_header_parse, | |
543 | }; | |
544 | ||
e949b09b DG |
545 | static struct device_type vlan_type = { |
546 | .name = "vlan", | |
547 | }; | |
548 | ||
213b15ca | 549 | static const struct net_device_ops vlan_netdev_ops; |
f7d1b9f5 | 550 | |
ef3eb3e5 PM |
551 | static int vlan_dev_init(struct net_device *dev) |
552 | { | |
7da82c06 | 553 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
ef3eb3e5 PM |
554 | int subclass = 0; |
555 | ||
adc667e8 JV |
556 | netif_carrier_off(dev); |
557 | ||
ef3eb3e5 | 558 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
194dbcc8 JF |
559 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
560 | IFF_MASTER | IFF_SLAVE); | |
ef3eb3e5 PM |
561 | dev->iflink = real_dev->ifindex; |
562 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
563 | (1<<__LINK_STATE_DORMANT))) | | |
564 | (1<<__LINK_STATE_PRESENT); | |
565 | ||
62f2a3a4 MM |
566 | dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | |
567 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | | |
568 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | | |
569 | NETIF_F_ALL_FCOE; | |
570 | ||
8a0427bb | 571 | dev->features |= real_dev->vlan_features | NETIF_F_LLTX; |
1ae4be22 | 572 | dev->gso_max_size = real_dev->gso_max_size; |
5fb13570 | 573 | |
ef3eb3e5 PM |
574 | /* ipv6 shared card related stuff */ |
575 | dev->dev_id = real_dev->dev_id; | |
576 | ||
577 | if (is_zero_ether_addr(dev->dev_addr)) | |
578 | memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); | |
579 | if (is_zero_ether_addr(dev->broadcast)) | |
580 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
581 | ||
f4d5392e | 582 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
583 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
584 | #endif | |
585 | ||
d870bfb9 | 586 | dev->needed_headroom = real_dev->needed_headroom; |
f646968f | 587 | if (real_dev->features & NETIF_F_HW_VLAN_CTAG_TX) { |
ef3eb3e5 PM |
588 | dev->header_ops = real_dev->header_ops; |
589 | dev->hard_header_len = real_dev->hard_header_len; | |
ef3eb3e5 PM |
590 | } else { |
591 | dev->header_ops = &vlan_header_ops; | |
592 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
ef3eb3e5 PM |
593 | } |
594 | ||
213b15ca | 595 | dev->netdev_ops = &vlan_netdev_ops; |
636e19a3 | 596 | |
e949b09b DG |
597 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
598 | ||
26a25239 | 599 | if (is_vlan_dev(real_dev)) |
ef3eb3e5 PM |
600 | subclass = 1; |
601 | ||
c773e847 | 602 | vlan_dev_set_lockdep_class(dev, subclass); |
9793241f | 603 | |
7da82c06 JP |
604 | vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats); |
605 | if (!vlan_dev_priv(dev)->vlan_pcpu_stats) | |
9793241f ED |
606 | return -ENOMEM; |
607 | ||
ef3eb3e5 PM |
608 | return 0; |
609 | } | |
610 | ||
23556323 PE |
611 | static void vlan_dev_uninit(struct net_device *dev) |
612 | { | |
613 | struct vlan_priority_tci_mapping *pm; | |
7da82c06 | 614 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
23556323 PE |
615 | int i; |
616 | ||
4af429d2 ED |
617 | free_percpu(vlan->vlan_pcpu_stats); |
618 | vlan->vlan_pcpu_stats = NULL; | |
23556323 PE |
619 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { |
620 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
621 | vlan->egress_priority_map[i] = pm->next; | |
622 | kfree(pm); | |
623 | } | |
624 | } | |
625 | } | |
626 | ||
c8f44aff MM |
627 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
628 | netdev_features_t features) | |
8a0427bb | 629 | { |
7da82c06 | 630 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
712ae51a | 631 | u32 old_features = features; |
8a0427bb | 632 | |
f0a619cc | 633 | features &= real_dev->vlan_features; |
bc5787c6 MM |
634 | features |= NETIF_F_RXCSUM; |
635 | features &= real_dev->features; | |
712ae51a | 636 | |
6c9c1b54 | 637 | features |= old_features & NETIF_F_SOFT_FEATURES; |
f0a619cc | 638 | features |= NETIF_F_LLTX; |
8a0427bb MM |
639 | |
640 | return features; | |
641 | } | |
642 | ||
b3020061 SH |
643 | static int vlan_ethtool_get_settings(struct net_device *dev, |
644 | struct ethtool_cmd *cmd) | |
645 | { | |
7da82c06 | 646 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
4bc71cb9 JP |
647 | |
648 | return __ethtool_get_settings(vlan->real_dev, cmd); | |
b3020061 SH |
649 | } |
650 | ||
651 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
652 | struct ethtool_drvinfo *info) | |
653 | { | |
7826d43f JP |
654 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
655 | strlcpy(info->version, vlan_version, sizeof(info->version)); | |
656 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
b3020061 SH |
657 | } |
658 | ||
28172739 | 659 | static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
9793241f | 660 | { |
9793241f | 661 | |
7da82c06 | 662 | if (vlan_dev_priv(dev)->vlan_pcpu_stats) { |
4af429d2 ED |
663 | struct vlan_pcpu_stats *p; |
664 | u32 rx_errors = 0, tx_dropped = 0; | |
9793241f ED |
665 | int i; |
666 | ||
667 | for_each_possible_cpu(i) { | |
4af429d2 | 668 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; |
9618e2ff ED |
669 | unsigned int start; |
670 | ||
7da82c06 | 671 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); |
9618e2ff ED |
672 | do { |
673 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
674 | rxpackets = p->rx_packets; | |
675 | rxbytes = p->rx_bytes; | |
676 | rxmulticast = p->rx_multicast; | |
4af429d2 ED |
677 | txpackets = p->tx_packets; |
678 | txbytes = p->tx_bytes; | |
9618e2ff | 679 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
4af429d2 ED |
680 | |
681 | stats->rx_packets += rxpackets; | |
682 | stats->rx_bytes += rxbytes; | |
683 | stats->multicast += rxmulticast; | |
684 | stats->tx_packets += txpackets; | |
685 | stats->tx_bytes += txbytes; | |
686 | /* rx_errors & tx_dropped are u32 */ | |
687 | rx_errors += p->rx_errors; | |
688 | tx_dropped += p->tx_dropped; | |
9793241f | 689 | } |
4af429d2 ED |
690 | stats->rx_errors = rx_errors; |
691 | stats->tx_dropped = tx_dropped; | |
9793241f ED |
692 | } |
693 | return stats; | |
694 | } | |
695 | ||
6d4cdf47 | 696 | #ifdef CONFIG_NET_POLL_CONTROLLER |
de93cb2e | 697 | static void vlan_dev_poll_controller(struct net_device *dev) |
6d4cdf47 BL |
698 | { |
699 | return; | |
700 | } | |
701 | ||
47be03a2 AW |
702 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo, |
703 | gfp_t gfp) | |
6d4cdf47 | 704 | { |
f3da3893 AW |
705 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
706 | struct net_device *real_dev = vlan->real_dev; | |
6d4cdf47 BL |
707 | struct netpoll *netpoll; |
708 | int err = 0; | |
709 | ||
47be03a2 | 710 | netpoll = kzalloc(sizeof(*netpoll), gfp); |
6d4cdf47 BL |
711 | err = -ENOMEM; |
712 | if (!netpoll) | |
713 | goto out; | |
714 | ||
47be03a2 | 715 | err = __netpoll_setup(netpoll, real_dev, gfp); |
6d4cdf47 BL |
716 | if (err) { |
717 | kfree(netpoll); | |
718 | goto out; | |
719 | } | |
720 | ||
f3da3893 | 721 | vlan->netpoll = netpoll; |
6d4cdf47 BL |
722 | |
723 | out: | |
724 | return err; | |
725 | } | |
726 | ||
de93cb2e | 727 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
6d4cdf47 | 728 | { |
f3da3893 AW |
729 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
730 | struct netpoll *netpoll = vlan->netpoll; | |
6d4cdf47 BL |
731 | |
732 | if (!netpoll) | |
733 | return; | |
734 | ||
f3da3893 | 735 | vlan->netpoll = NULL; |
6d4cdf47 | 736 | |
2cde6acd | 737 | __netpoll_free_async(netpoll); |
6d4cdf47 BL |
738 | } |
739 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
740 | ||
75b8846a | 741 | static const struct ethtool_ops vlan_ethtool_ops = { |
b3020061 SH |
742 | .get_settings = vlan_ethtool_get_settings, |
743 | .get_drvinfo = vlan_ethtool_get_drvinfo, | |
75b8846a | 744 | .get_link = ethtool_op_get_link, |
75b8846a PM |
745 | }; |
746 | ||
656299f7 SH |
747 | static const struct net_device_ops vlan_netdev_ops = { |
748 | .ndo_change_mtu = vlan_dev_change_mtu, | |
749 | .ndo_init = vlan_dev_init, | |
750 | .ndo_uninit = vlan_dev_uninit, | |
751 | .ndo_open = vlan_dev_open, | |
752 | .ndo_stop = vlan_dev_stop, | |
669d3e0b VD |
753 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
754 | .ndo_validate_addr = eth_validate_addr, | |
755 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
756 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
669d3e0b VD |
757 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
758 | .ndo_do_ioctl = vlan_dev_ioctl, | |
759 | .ndo_neigh_setup = vlan_dev_neigh_setup, | |
9618e2ff | 760 | .ndo_get_stats64 = vlan_dev_get_stats64, |
f4d5392e | 761 | #if IS_ENABLED(CONFIG_FCOE) |
669d3e0b VD |
762 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
763 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
764 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, | |
765 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
766 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, | |
4ea09c9c | 767 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
6d4cdf47 BL |
768 | #endif |
769 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
770 | .ndo_poll_controller = vlan_dev_poll_controller, | |
771 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, | |
772 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, | |
669d3e0b | 773 | #endif |
8a0427bb | 774 | .ndo_fix_features = vlan_dev_fix_features, |
669d3e0b VD |
775 | }; |
776 | ||
ef3eb3e5 PM |
777 | void vlan_setup(struct net_device *dev) |
778 | { | |
779 | ether_setup(dev); | |
780 | ||
781 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
550fd08c | 782 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
ef3eb3e5 PM |
783 | dev->tx_queue_len = 0; |
784 | ||
656299f7 | 785 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 | 786 | dev->destructor = free_netdev; |
75b8846a | 787 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
788 | |
789 | memset(dev->broadcast, 0, ETH_ALEN); | |
790 | } |