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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 | ||
23 | #include <linux/module.h> | |
1da177e4 LT |
24 | #include <linux/skbuff.h> |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
75b8846a | 27 | #include <linux/ethtool.h> |
1da177e4 LT |
28 | #include <net/arp.h> |
29 | ||
30 | #include "vlan.h" | |
31 | #include "vlanproc.h" | |
32 | #include <linux/if_vlan.h> | |
1da177e4 LT |
33 | |
34 | /* | |
35 | * Rebuild the Ethernet MAC header. This is called after an ARP | |
36 | * (or in future other address resolution) has completed on this | |
37 | * sk_buff. We now let ARP fill in the other fields. | |
38 | * | |
39 | * This routine CANNOT use cached dst->neigh! | |
40 | * Really, it is used only when dst->neigh is wrong. | |
41 | * | |
42 | * TODO: This needs a checkup, I'm ignorant here. --BLG | |
43 | */ | |
ef3eb3e5 | 44 | static int vlan_dev_rebuild_header(struct sk_buff *skb) |
1da177e4 LT |
45 | { |
46 | struct net_device *dev = skb->dev; | |
47 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); | |
48 | ||
49 | switch (veth->h_vlan_encapsulated_proto) { | |
50 | #ifdef CONFIG_INET | |
60678040 | 51 | case htons(ETH_P_IP): |
1da177e4 LT |
52 | |
53 | /* TODO: Confirm this will work with VLAN headers... */ | |
54 | return arp_find(veth->h_dest, skb); | |
122952fc | 55 | #endif |
1da177e4 | 56 | default: |
40f98e1a PM |
57 | pr_debug("%s: unable to resolve type %X addresses.\n", |
58 | dev->name, ntohs(veth->h_vlan_encapsulated_proto)); | |
122952fc | 59 | |
1da177e4 LT |
60 | memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); |
61 | break; | |
3ff50b79 | 62 | } |
1da177e4 LT |
63 | |
64 | return 0; | |
65 | } | |
66 | ||
67 | static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb) | |
68 | { | |
9dfebcc6 | 69 | if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) { |
11a100f8 PM |
70 | if (skb_cow(skb, skb_headroom(skb)) < 0) |
71 | skb = NULL; | |
1da177e4 LT |
72 | if (skb) { |
73 | /* Lifted from Gleb's VLAN code... */ | |
74 | memmove(skb->data - ETH_HLEN, | |
75 | skb->data - VLAN_ETH_HLEN, 12); | |
b0e380b1 | 76 | skb->mac_header += VLAN_HLEN; |
1da177e4 LT |
77 | } |
78 | } | |
79 | ||
80 | return skb; | |
81 | } | |
82 | ||
91b4f954 PE |
83 | static inline void vlan_set_encap_proto(struct sk_buff *skb, |
84 | struct vlan_hdr *vhdr) | |
85 | { | |
86 | __be16 proto; | |
87 | unsigned char *rawp; | |
88 | ||
89 | /* | |
90 | * Was a VLAN packet, grab the encapsulated protocol, which the layer | |
91 | * three protocols care about. | |
92 | */ | |
93 | ||
94 | proto = vhdr->h_vlan_encapsulated_proto; | |
95 | if (ntohs(proto) >= 1536) { | |
96 | skb->protocol = proto; | |
97 | return; | |
98 | } | |
99 | ||
100 | rawp = skb->data; | |
101 | if (*(unsigned short *)rawp == 0xFFFF) | |
102 | /* | |
103 | * This is a magic hack to spot IPX packets. Older Novell | |
104 | * breaks the protocol design and runs IPX over 802.3 without | |
105 | * an 802.2 LLC layer. We look for FFFF which isn't a used | |
106 | * 802.2 SSAP/DSAP. This won't work for fault tolerant netware | |
107 | * but does for the rest. | |
108 | */ | |
109 | skb->protocol = htons(ETH_P_802_3); | |
110 | else | |
111 | /* | |
112 | * Real 802.2 LLC | |
113 | */ | |
114 | skb->protocol = htons(ETH_P_802_2); | |
115 | } | |
116 | ||
1da177e4 | 117 | /* |
122952fc | 118 | * Determine the packet's protocol ID. The rule here is that we |
1da177e4 LT |
119 | * assume 802.3 if the type field is short enough to be a length. |
120 | * This is normal practice and works for any 'now in use' protocol. | |
121 | * | |
122 | * Also, at this point we assume that we ARE dealing exclusively with | |
123 | * VLAN packets, or packets that should be made into VLAN packets based | |
124 | * on a default VLAN ID. | |
125 | * | |
126 | * NOTE: Should be similar to ethernet/eth.c. | |
127 | * | |
128 | * SANITY NOTE: This method is called when a packet is moving up the stack | |
129 | * towards userland. To get here, it would have already passed | |
130 | * through the ethernet/eth.c eth_type_trans() method. | |
131 | * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be | |
132 | * stored UNALIGNED in the memory. RISC systems don't like | |
133 | * such cases very much... | |
2029cc2c PM |
134 | * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be |
135 | * aligned, so there doesn't need to be any of the unaligned | |
136 | * stuff. It has been commented out now... --Ben | |
1da177e4 LT |
137 | * |
138 | */ | |
139 | int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, | |
2029cc2c | 140 | struct packet_type *ptype, struct net_device *orig_dev) |
1da177e4 | 141 | { |
e7c243c9 | 142 | struct vlan_hdr *vhdr; |
1da177e4 | 143 | struct net_device_stats *stats; |
9bb8582e PM |
144 | u16 vlan_id; |
145 | u16 vlan_tci; | |
1da177e4 | 146 | |
2029cc2c PM |
147 | skb = skb_share_check(skb, GFP_ATOMIC); |
148 | if (skb == NULL) | |
31ffdbcb | 149 | goto err_free; |
e7c243c9 | 150 | |
31ffdbcb PM |
151 | if (unlikely(!pskb_may_pull(skb, VLAN_HLEN))) |
152 | goto err_free; | |
e7c243c9 | 153 | |
31ffdbcb | 154 | vhdr = (struct vlan_hdr *)skb->data; |
9bb8582e PM |
155 | vlan_tci = ntohs(vhdr->h_vlan_TCI); |
156 | vlan_id = vlan_tci & VLAN_VID_MASK; | |
1da177e4 | 157 | |
1da177e4 | 158 | rcu_read_lock(); |
9bb8582e | 159 | skb->dev = __find_vlan_dev(dev, vlan_id); |
1da177e4 | 160 | if (!skb->dev) { |
2029cc2c | 161 | pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n", |
9bb8582e | 162 | __func__, vlan_id, dev->name); |
31ffdbcb | 163 | goto err_unlock; |
1da177e4 LT |
164 | } |
165 | ||
7bd38d77 | 166 | stats = &skb->dev->stats; |
1da177e4 LT |
167 | stats->rx_packets++; |
168 | stats->rx_bytes += skb->len; | |
169 | ||
cbb042f9 | 170 | skb_pull_rcsum(skb, VLAN_HLEN); |
a388442c | 171 | |
9bb8582e | 172 | skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci); |
1da177e4 | 173 | |
40f98e1a | 174 | pr_debug("%s: priority: %u for TCI: %hu\n", |
9bb8582e | 175 | __func__, skb->priority, vlan_tci); |
1da177e4 | 176 | |
1da177e4 LT |
177 | switch (skb->pkt_type) { |
178 | case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ | |
2029cc2c | 179 | /* stats->broadcast ++; // no such counter :-( */ |
1da177e4 LT |
180 | break; |
181 | ||
182 | case PACKET_MULTICAST: | |
183 | stats->multicast++; | |
184 | break; | |
185 | ||
122952fc | 186 | case PACKET_OTHERHOST: |
1da177e4 | 187 | /* Our lower layer thinks this is not local, let's make sure. |
2029cc2c PM |
188 | * This allows the VLAN to have a different MAC than the |
189 | * underlying device, and still route correctly. | |
1da177e4 | 190 | */ |
2029cc2c PM |
191 | if (!compare_ether_addr(eth_hdr(skb)->h_dest, |
192 | skb->dev->dev_addr)) | |
1da177e4 | 193 | skb->pkt_type = PACKET_HOST; |
1da177e4 LT |
194 | break; |
195 | default: | |
196 | break; | |
3ff50b79 | 197 | } |
1da177e4 | 198 | |
91b4f954 | 199 | vlan_set_encap_proto(skb, vhdr); |
1da177e4 | 200 | |
1da177e4 | 201 | skb = vlan_check_reorder_header(skb); |
31ffdbcb | 202 | if (!skb) { |
1da177e4 | 203 | stats->rx_errors++; |
31ffdbcb | 204 | goto err_unlock; |
1da177e4 | 205 | } |
31ffdbcb PM |
206 | |
207 | netif_rx(skb); | |
1da177e4 | 208 | rcu_read_unlock(); |
31ffdbcb PM |
209 | return NET_RX_SUCCESS; |
210 | ||
211 | err_unlock: | |
212 | rcu_read_unlock(); | |
213 | err_free: | |
214 | kfree_skb(skb); | |
215 | return NET_RX_DROP; | |
1da177e4 LT |
216 | } |
217 | ||
9bb8582e | 218 | static inline u16 |
2029cc2c | 219 | vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) |
1da177e4 | 220 | { |
2029cc2c | 221 | struct vlan_priority_tci_mapping *mp; |
1da177e4 | 222 | |
2029cc2c | 223 | mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; |
1da177e4 LT |
224 | while (mp) { |
225 | if (mp->priority == skb->priority) { | |
2029cc2c PM |
226 | return mp->vlan_qos; /* This should already be shifted |
227 | * to mask correctly with the | |
228 | * VLAN's TCI */ | |
1da177e4 LT |
229 | } |
230 | mp = mp->next; | |
231 | } | |
232 | return 0; | |
233 | } | |
234 | ||
235 | /* | |
122952fc | 236 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
237 | * |
238 | * saddr=NULL means use device source address | |
239 | * daddr=NULL means leave destination address (eg unresolved arp) | |
240 | * | |
241 | * This is called when the SKB is moving down the stack towards the | |
242 | * physical devices. | |
243 | */ | |
ef3eb3e5 PM |
244 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
245 | unsigned short type, | |
246 | const void *daddr, const void *saddr, | |
247 | unsigned int len) | |
1da177e4 LT |
248 | { |
249 | struct vlan_hdr *vhdr; | |
1349fe9a | 250 | unsigned int vhdrlen = 0; |
9bb8582e | 251 | u16 vlan_tci = 0; |
1349fe9a | 252 | int rc; |
1da177e4 | 253 | |
11a100f8 PM |
254 | if (WARN_ON(skb_headroom(skb) < dev->hard_header_len)) |
255 | return -ENOSPC; | |
256 | ||
1349fe9a | 257 | if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) { |
1da177e4 LT |
258 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
259 | ||
9bb8582e PM |
260 | vlan_tci = vlan_dev_info(dev)->vlan_id; |
261 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); | |
9bb8582e | 262 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
263 | |
264 | /* | |
2029cc2c PM |
265 | * Set the protocol type. For a packet of type ETH_P_802_3 we |
266 | * put the length in here instead. It is up to the 802.2 | |
267 | * layer to carry protocol information. | |
1da177e4 | 268 | */ |
2029cc2c | 269 | if (type != ETH_P_802_3) |
1da177e4 | 270 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 271 | else |
1da177e4 | 272 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a JB |
273 | |
274 | skb->protocol = htons(ETH_P_8021Q); | |
1349fe9a PM |
275 | type = ETH_P_8021Q; |
276 | vhdrlen = VLAN_HLEN; | |
1da177e4 LT |
277 | } |
278 | ||
279 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
280 | if (saddr == NULL) | |
281 | saddr = dev->dev_addr; | |
282 | ||
1349fe9a | 283 | /* Now make the underlying real hard header */ |
9dfebcc6 | 284 | dev = vlan_dev_info(dev)->real_dev; |
1349fe9a PM |
285 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
286 | if (rc > 0) | |
287 | rc += vhdrlen; | |
1da177e4 LT |
288 | return rc; |
289 | } | |
290 | ||
ef3eb3e5 | 291 | static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 292 | { |
7bd38d77 | 293 | struct net_device_stats *stats = &dev->stats; |
1da177e4 | 294 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
55b01e86 | 295 | |
1da177e4 LT |
296 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
297 | * | |
298 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
299 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
300 | */ | |
6ab3b487 | 301 | if (veth->h_vlan_proto != htons(ETH_P_8021Q) || |
d80aa31b PM |
302 | vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { |
303 | unsigned int orig_headroom = skb_headroom(skb); | |
9bb8582e | 304 | u16 vlan_tci; |
1da177e4 | 305 | |
9dfebcc6 | 306 | vlan_dev_info(dev)->cnt_encap_on_xmit++; |
1da177e4 | 307 | |
9bb8582e PM |
308 | vlan_tci = vlan_dev_info(dev)->vlan_id; |
309 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); | |
9bb8582e | 310 | skb = __vlan_put_tag(skb, vlan_tci); |
1da177e4 LT |
311 | if (!skb) { |
312 | stats->tx_dropped++; | |
d80aa31b | 313 | return NETDEV_TX_OK; |
1da177e4 LT |
314 | } |
315 | ||
2029cc2c | 316 | if (orig_headroom < VLAN_HLEN) |
9dfebcc6 | 317 | vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; |
1da177e4 LT |
318 | } |
319 | ||
d80aa31b | 320 | stats->tx_packets++; |
1da177e4 LT |
321 | stats->tx_bytes += skb->len; |
322 | ||
9dfebcc6 | 323 | skb->dev = vlan_dev_info(dev)->real_dev; |
1da177e4 | 324 | dev_queue_xmit(skb); |
d80aa31b | 325 | return NETDEV_TX_OK; |
1da177e4 LT |
326 | } |
327 | ||
ef3eb3e5 PM |
328 | static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, |
329 | struct net_device *dev) | |
1da177e4 | 330 | { |
7bd38d77 | 331 | struct net_device_stats *stats = &dev->stats; |
9bb8582e | 332 | u16 vlan_tci; |
1da177e4 | 333 | |
9bb8582e PM |
334 | vlan_tci = vlan_dev_info(dev)->vlan_id; |
335 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); | |
336 | skb = __vlan_hwaccel_put_tag(skb, vlan_tci); | |
1da177e4 LT |
337 | |
338 | stats->tx_packets++; | |
339 | stats->tx_bytes += skb->len; | |
340 | ||
9dfebcc6 | 341 | skb->dev = vlan_dev_info(dev)->real_dev; |
1da177e4 | 342 | dev_queue_xmit(skb); |
d80aa31b | 343 | return NETDEV_TX_OK; |
1da177e4 LT |
344 | } |
345 | ||
ef3eb3e5 | 346 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
347 | { |
348 | /* TODO: gotta make sure the underlying layer can handle it, | |
349 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
350 | */ | |
9dfebcc6 | 351 | if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
352 | return -ERANGE; |
353 | ||
354 | dev->mtu = new_mtu; | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
c17d8874 | 359 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 360 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 361 | { |
9dfebcc6 | 362 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
b020cb48 PM |
363 | |
364 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
365 | vlan->nr_ingress_mappings--; | |
366 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
367 | vlan->nr_ingress_mappings++; | |
368 | ||
369 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
370 | } |
371 | ||
c17d8874 | 372 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 373 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 374 | { |
9dfebcc6 | 375 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
1da177e4 LT |
376 | struct vlan_priority_tci_mapping *mp = NULL; |
377 | struct vlan_priority_tci_mapping *np; | |
b020cb48 | 378 | u32 vlan_qos = (vlan_prio << 13) & 0xE000; |
122952fc | 379 | |
c17d8874 | 380 | /* See if a priority mapping exists.. */ |
b020cb48 | 381 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
382 | while (mp) { |
383 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
384 | if (mp->vlan_qos && !vlan_qos) |
385 | vlan->nr_egress_mappings--; | |
386 | else if (!mp->vlan_qos && vlan_qos) | |
387 | vlan->nr_egress_mappings++; | |
388 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 389 | return 0; |
1da177e4 | 390 | } |
c17d8874 | 391 | mp = mp->next; |
1da177e4 | 392 | } |
c17d8874 PM |
393 | |
394 | /* Create a new mapping then. */ | |
b020cb48 | 395 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
396 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
397 | if (!np) | |
398 | return -ENOBUFS; | |
399 | ||
400 | np->next = mp; | |
401 | np->priority = skb_prio; | |
b020cb48 PM |
402 | np->vlan_qos = vlan_qos; |
403 | vlan->egress_priority_map[skb_prio & 0xF] = np; | |
404 | if (vlan_qos) | |
405 | vlan->nr_egress_mappings++; | |
c17d8874 | 406 | return 0; |
1da177e4 LT |
407 | } |
408 | ||
a4bf3af4 | 409 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 410 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 411 | { |
b3ce0325 PM |
412 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
413 | u32 old_flags = vlan->flags; | |
414 | ||
70c03b49 | 415 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP)) |
b3ce0325 PM |
416 | return -EINVAL; |
417 | ||
418 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
419 | |
420 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
421 | if (vlan->flags & VLAN_FLAG_GVRP) | |
422 | vlan_gvrp_request_join(dev); | |
423 | else | |
424 | vlan_gvrp_request_leave(dev); | |
425 | } | |
b3ce0325 | 426 | return 0; |
1da177e4 LT |
427 | } |
428 | ||
c17d8874 | 429 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 430 | { |
9dfebcc6 | 431 | strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); |
1da177e4 LT |
432 | } |
433 | ||
ef3eb3e5 | 434 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 435 | { |
9dfebcc6 | 436 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
8c979c26 PM |
437 | struct net_device *real_dev = vlan->real_dev; |
438 | int err; | |
439 | ||
440 | if (!(real_dev->flags & IFF_UP)) | |
1da177e4 LT |
441 | return -ENETDOWN; |
442 | ||
8c979c26 PM |
443 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { |
444 | err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); | |
445 | if (err < 0) | |
89146504 | 446 | goto out; |
8c979c26 | 447 | } |
8c979c26 | 448 | |
89146504 WC |
449 | if (dev->flags & IFF_ALLMULTI) { |
450 | err = dev_set_allmulti(real_dev, 1); | |
451 | if (err < 0) | |
452 | goto del_unicast; | |
453 | } | |
454 | if (dev->flags & IFF_PROMISC) { | |
455 | err = dev_set_promiscuity(real_dev, 1); | |
456 | if (err < 0) | |
457 | goto clear_allmulti; | |
458 | } | |
459 | ||
460 | memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); | |
6c78dcbd | 461 | |
70c03b49 PM |
462 | if (vlan->flags & VLAN_FLAG_GVRP) |
463 | vlan_gvrp_request_join(dev); | |
464 | ||
1da177e4 | 465 | return 0; |
89146504 WC |
466 | |
467 | clear_allmulti: | |
468 | if (dev->flags & IFF_ALLMULTI) | |
469 | dev_set_allmulti(real_dev, -1); | |
470 | del_unicast: | |
471 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) | |
472 | dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); | |
473 | out: | |
474 | return err; | |
1da177e4 LT |
475 | } |
476 | ||
ef3eb3e5 | 477 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 478 | { |
70c03b49 PM |
479 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
480 | struct net_device *real_dev = vlan->real_dev; | |
481 | ||
482 | if (vlan->flags & VLAN_FLAG_GVRP) | |
483 | vlan_gvrp_request_leave(dev); | |
8c979c26 | 484 | |
56addd6e | 485 | dev_mc_unsync(real_dev, dev); |
e83a2ea8 | 486 | dev_unicast_unsync(real_dev, dev); |
6c78dcbd PM |
487 | if (dev->flags & IFF_ALLMULTI) |
488 | dev_set_allmulti(real_dev, -1); | |
489 | if (dev->flags & IFF_PROMISC) | |
490 | dev_set_promiscuity(real_dev, -1); | |
491 | ||
8c979c26 PM |
492 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) |
493 | dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len); | |
494 | ||
1da177e4 LT |
495 | return 0; |
496 | } | |
497 | ||
ef3eb3e5 | 498 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 499 | { |
9dfebcc6 | 500 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
39aaac11 PM |
501 | struct sockaddr *addr = p; |
502 | int err; | |
503 | ||
504 | if (!is_valid_ether_addr(addr->sa_data)) | |
505 | return -EADDRNOTAVAIL; | |
506 | ||
507 | if (!(dev->flags & IFF_UP)) | |
508 | goto out; | |
509 | ||
510 | if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { | |
511 | err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN); | |
512 | if (err < 0) | |
513 | return err; | |
514 | } | |
515 | ||
516 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) | |
517 | dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); | |
518 | ||
519 | out: | |
520 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
521 | return 0; | |
522 | } | |
523 | ||
ef3eb3e5 | 524 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 525 | { |
9dfebcc6 | 526 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
656299f7 | 527 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
528 | struct ifreq ifrr; |
529 | int err = -EOPNOTSUPP; | |
530 | ||
531 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
532 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
533 | ||
2029cc2c | 534 | switch (cmd) { |
1da177e4 LT |
535 | case SIOCGMIIPHY: |
536 | case SIOCGMIIREG: | |
537 | case SIOCSMIIREG: | |
656299f7 SH |
538 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
539 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 540 | break; |
1da177e4 LT |
541 | } |
542 | ||
122952fc | 543 | if (!err) |
1da177e4 LT |
544 | ifr->ifr_ifru = ifrr.ifr_ifru; |
545 | ||
546 | return err; | |
547 | } | |
548 | ||
cc883d16 FB |
549 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
550 | { | |
551 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
552 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
553 | int err = 0; | |
554 | ||
555 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 556 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
557 | |
558 | return err; | |
559 | } | |
560 | ||
ef3eb3e5 | 561 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 562 | { |
9dfebcc6 | 563 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
6c78dcbd PM |
564 | |
565 | if (change & IFF_ALLMULTI) | |
566 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
567 | if (change & IFF_PROMISC) | |
568 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
569 | } | |
570 | ||
e83a2ea8 | 571 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 572 | { |
9dfebcc6 | 573 | dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
e83a2ea8 | 574 | dev_unicast_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
1da177e4 | 575 | } |
ef3eb3e5 PM |
576 | |
577 | /* | |
578 | * vlan network devices have devices nesting below it, and are a special | |
579 | * "super class" of normal network devices; split their locks off into a | |
580 | * separate class since they always nest. | |
581 | */ | |
582 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 583 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 584 | |
e8a0464c DM |
585 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
586 | struct netdev_queue *txq, | |
587 | void *_subclass) | |
c773e847 DM |
588 | { |
589 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
590 | &vlan_netdev_xmit_lock_key, |
591 | *(int *)_subclass); | |
c773e847 DM |
592 | } |
593 | ||
594 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
595 | { | |
cf508b12 DM |
596 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
597 | &vlan_netdev_addr_lock_key, | |
598 | subclass); | |
e8a0464c | 599 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
600 | } |
601 | ||
ef3eb3e5 PM |
602 | static const struct header_ops vlan_header_ops = { |
603 | .create = vlan_dev_hard_header, | |
604 | .rebuild = vlan_dev_rebuild_header, | |
605 | .parse = eth_header_parse, | |
606 | }; | |
607 | ||
f7d1b9f5 ED |
608 | static const struct net_device_ops vlan_netdev_ops, vlan_netdev_accel_ops; |
609 | ||
ef3eb3e5 PM |
610 | static int vlan_dev_init(struct net_device *dev) |
611 | { | |
9dfebcc6 | 612 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
ef3eb3e5 PM |
613 | int subclass = 0; |
614 | ||
615 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ | |
0ed21b32 | 616 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI); |
ef3eb3e5 PM |
617 | dev->iflink = real_dev->ifindex; |
618 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
619 | (1<<__LINK_STATE_DORMANT))) | | |
620 | (1<<__LINK_STATE_PRESENT); | |
621 | ||
289c79a4 | 622 | dev->features |= real_dev->features & real_dev->vlan_features; |
1ae4be22 | 623 | dev->gso_max_size = real_dev->gso_max_size; |
5fb13570 | 624 | |
ef3eb3e5 PM |
625 | /* ipv6 shared card related stuff */ |
626 | dev->dev_id = real_dev->dev_id; | |
627 | ||
628 | if (is_zero_ether_addr(dev->dev_addr)) | |
629 | memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); | |
630 | if (is_zero_ether_addr(dev->broadcast)) | |
631 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
632 | ||
633 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { | |
634 | dev->header_ops = real_dev->header_ops; | |
635 | dev->hard_header_len = real_dev->hard_header_len; | |
f7d1b9f5 | 636 | dev->netdev_ops = &vlan_netdev_accel_ops; |
ef3eb3e5 PM |
637 | } else { |
638 | dev->header_ops = &vlan_header_ops; | |
639 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
f7d1b9f5 | 640 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 | 641 | } |
9d40bbda | 642 | netdev_resync_ops(dev); |
ef3eb3e5 | 643 | |
26a25239 | 644 | if (is_vlan_dev(real_dev)) |
ef3eb3e5 PM |
645 | subclass = 1; |
646 | ||
c773e847 | 647 | vlan_dev_set_lockdep_class(dev, subclass); |
ef3eb3e5 PM |
648 | return 0; |
649 | } | |
650 | ||
23556323 PE |
651 | static void vlan_dev_uninit(struct net_device *dev) |
652 | { | |
653 | struct vlan_priority_tci_mapping *pm; | |
654 | struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
655 | int i; | |
656 | ||
657 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { | |
658 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
659 | vlan->egress_priority_map[i] = pm->next; | |
660 | kfree(pm); | |
661 | } | |
662 | } | |
663 | } | |
664 | ||
b3020061 SH |
665 | static int vlan_ethtool_get_settings(struct net_device *dev, |
666 | struct ethtool_cmd *cmd) | |
667 | { | |
668 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
669 | struct net_device *real_dev = vlan->real_dev; | |
670 | ||
671 | if (!real_dev->ethtool_ops->get_settings) | |
672 | return -EOPNOTSUPP; | |
673 | ||
674 | return real_dev->ethtool_ops->get_settings(real_dev, cmd); | |
675 | } | |
676 | ||
677 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
678 | struct ethtool_drvinfo *info) | |
679 | { | |
680 | strcpy(info->driver, vlan_fullname); | |
681 | strcpy(info->version, vlan_version); | |
682 | strcpy(info->fw_version, "N/A"); | |
683 | } | |
684 | ||
75b8846a PM |
685 | static u32 vlan_ethtool_get_rx_csum(struct net_device *dev) |
686 | { | |
687 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
688 | struct net_device *real_dev = vlan->real_dev; | |
689 | ||
690 | if (real_dev->ethtool_ops == NULL || | |
691 | real_dev->ethtool_ops->get_rx_csum == NULL) | |
692 | return 0; | |
693 | return real_dev->ethtool_ops->get_rx_csum(real_dev); | |
694 | } | |
695 | ||
19b9a4e2 PM |
696 | static u32 vlan_ethtool_get_flags(struct net_device *dev) |
697 | { | |
698 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
699 | struct net_device *real_dev = vlan->real_dev; | |
700 | ||
701 | if (!(real_dev->features & NETIF_F_HW_VLAN_RX) || | |
702 | real_dev->ethtool_ops == NULL || | |
703 | real_dev->ethtool_ops->get_flags == NULL) | |
704 | return 0; | |
705 | return real_dev->ethtool_ops->get_flags(real_dev); | |
706 | } | |
707 | ||
75b8846a | 708 | static const struct ethtool_ops vlan_ethtool_ops = { |
b3020061 SH |
709 | .get_settings = vlan_ethtool_get_settings, |
710 | .get_drvinfo = vlan_ethtool_get_drvinfo, | |
75b8846a PM |
711 | .get_link = ethtool_op_get_link, |
712 | .get_rx_csum = vlan_ethtool_get_rx_csum, | |
19b9a4e2 | 713 | .get_flags = vlan_ethtool_get_flags, |
75b8846a PM |
714 | }; |
715 | ||
656299f7 SH |
716 | static const struct net_device_ops vlan_netdev_ops = { |
717 | .ndo_change_mtu = vlan_dev_change_mtu, | |
718 | .ndo_init = vlan_dev_init, | |
719 | .ndo_uninit = vlan_dev_uninit, | |
720 | .ndo_open = vlan_dev_open, | |
721 | .ndo_stop = vlan_dev_stop, | |
f7d1b9f5 ED |
722 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
723 | .ndo_validate_addr = eth_validate_addr, | |
724 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
725 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
726 | .ndo_set_multicast_list = vlan_dev_set_rx_mode, | |
727 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, | |
728 | .ndo_do_ioctl = vlan_dev_ioctl, | |
cc883d16 | 729 | .ndo_neigh_setup = vlan_dev_neigh_setup, |
f7d1b9f5 ED |
730 | }; |
731 | ||
732 | static const struct net_device_ops vlan_netdev_accel_ops = { | |
733 | .ndo_change_mtu = vlan_dev_change_mtu, | |
734 | .ndo_init = vlan_dev_init, | |
735 | .ndo_uninit = vlan_dev_uninit, | |
736 | .ndo_open = vlan_dev_open, | |
737 | .ndo_stop = vlan_dev_stop, | |
738 | .ndo_start_xmit = vlan_dev_hwaccel_hard_start_xmit, | |
656299f7 SH |
739 | .ndo_validate_addr = eth_validate_addr, |
740 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
741 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
742 | .ndo_set_multicast_list = vlan_dev_set_rx_mode, | |
743 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, | |
744 | .ndo_do_ioctl = vlan_dev_ioctl, | |
cc883d16 | 745 | .ndo_neigh_setup = vlan_dev_neigh_setup, |
656299f7 SH |
746 | }; |
747 | ||
ef3eb3e5 PM |
748 | void vlan_setup(struct net_device *dev) |
749 | { | |
750 | ether_setup(dev); | |
751 | ||
752 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
753 | dev->tx_queue_len = 0; | |
754 | ||
656299f7 | 755 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 | 756 | dev->destructor = free_netdev; |
75b8846a | 757 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
758 | |
759 | memset(dev->broadcast, 0, ETH_ALEN); | |
760 | } |