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 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/init.h> | |
27 | #include <asm/uaccess.h> /* for copy_from_user */ | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <net/datalink.h> | |
32 | #include <net/p8022.h> | |
33 | #include <net/arp.h> | |
34 | ||
35 | #include "vlan.h" | |
36 | #include "vlanproc.h" | |
37 | #include <linux/if_vlan.h> | |
38 | #include <net/ip.h> | |
39 | ||
40 | /* | |
41 | * Rebuild the Ethernet MAC header. This is called after an ARP | |
42 | * (or in future other address resolution) has completed on this | |
43 | * sk_buff. We now let ARP fill in the other fields. | |
44 | * | |
45 | * This routine CANNOT use cached dst->neigh! | |
46 | * Really, it is used only when dst->neigh is wrong. | |
47 | * | |
48 | * TODO: This needs a checkup, I'm ignorant here. --BLG | |
49 | */ | |
ef3eb3e5 | 50 | static int vlan_dev_rebuild_header(struct sk_buff *skb) |
1da177e4 LT |
51 | { |
52 | struct net_device *dev = skb->dev; | |
53 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); | |
54 | ||
55 | switch (veth->h_vlan_encapsulated_proto) { | |
56 | #ifdef CONFIG_INET | |
57 | case __constant_htons(ETH_P_IP): | |
58 | ||
59 | /* TODO: Confirm this will work with VLAN headers... */ | |
60 | return arp_find(veth->h_dest, skb); | |
122952fc | 61 | #endif |
1da177e4 | 62 | default: |
40f98e1a PM |
63 | pr_debug("%s: unable to resolve type %X addresses.\n", |
64 | dev->name, ntohs(veth->h_vlan_encapsulated_proto)); | |
122952fc | 65 | |
1da177e4 LT |
66 | memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); |
67 | break; | |
3ff50b79 | 68 | } |
1da177e4 LT |
69 | |
70 | return 0; | |
71 | } | |
72 | ||
73 | static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb) | |
74 | { | |
9dfebcc6 | 75 | if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) { |
1da177e4 LT |
76 | if (skb_shared(skb) || skb_cloned(skb)) { |
77 | struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC); | |
78 | kfree_skb(skb); | |
79 | skb = nskb; | |
80 | } | |
81 | if (skb) { | |
82 | /* Lifted from Gleb's VLAN code... */ | |
83 | memmove(skb->data - ETH_HLEN, | |
84 | skb->data - VLAN_ETH_HLEN, 12); | |
b0e380b1 | 85 | skb->mac_header += VLAN_HLEN; |
1da177e4 LT |
86 | } |
87 | } | |
88 | ||
89 | return skb; | |
90 | } | |
91 | ||
91b4f954 PE |
92 | static inline void vlan_set_encap_proto(struct sk_buff *skb, |
93 | struct vlan_hdr *vhdr) | |
94 | { | |
95 | __be16 proto; | |
96 | unsigned char *rawp; | |
97 | ||
98 | /* | |
99 | * Was a VLAN packet, grab the encapsulated protocol, which the layer | |
100 | * three protocols care about. | |
101 | */ | |
102 | ||
103 | proto = vhdr->h_vlan_encapsulated_proto; | |
104 | if (ntohs(proto) >= 1536) { | |
105 | skb->protocol = proto; | |
106 | return; | |
107 | } | |
108 | ||
109 | rawp = skb->data; | |
110 | if (*(unsigned short *)rawp == 0xFFFF) | |
111 | /* | |
112 | * This is a magic hack to spot IPX packets. Older Novell | |
113 | * breaks the protocol design and runs IPX over 802.3 without | |
114 | * an 802.2 LLC layer. We look for FFFF which isn't a used | |
115 | * 802.2 SSAP/DSAP. This won't work for fault tolerant netware | |
116 | * but does for the rest. | |
117 | */ | |
118 | skb->protocol = htons(ETH_P_802_3); | |
119 | else | |
120 | /* | |
121 | * Real 802.2 LLC | |
122 | */ | |
123 | skb->protocol = htons(ETH_P_802_2); | |
124 | } | |
125 | ||
1da177e4 | 126 | /* |
122952fc | 127 | * Determine the packet's protocol ID. The rule here is that we |
1da177e4 LT |
128 | * assume 802.3 if the type field is short enough to be a length. |
129 | * This is normal practice and works for any 'now in use' protocol. | |
130 | * | |
131 | * Also, at this point we assume that we ARE dealing exclusively with | |
132 | * VLAN packets, or packets that should be made into VLAN packets based | |
133 | * on a default VLAN ID. | |
134 | * | |
135 | * NOTE: Should be similar to ethernet/eth.c. | |
136 | * | |
137 | * SANITY NOTE: This method is called when a packet is moving up the stack | |
138 | * towards userland. To get here, it would have already passed | |
139 | * through the ethernet/eth.c eth_type_trans() method. | |
140 | * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be | |
141 | * stored UNALIGNED in the memory. RISC systems don't like | |
142 | * such cases very much... | |
2029cc2c PM |
143 | * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be |
144 | * aligned, so there doesn't need to be any of the unaligned | |
145 | * stuff. It has been commented out now... --Ben | |
1da177e4 LT |
146 | * |
147 | */ | |
148 | int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, | |
2029cc2c | 149 | struct packet_type *ptype, struct net_device *orig_dev) |
1da177e4 | 150 | { |
e7c243c9 | 151 | struct vlan_hdr *vhdr; |
1da177e4 LT |
152 | unsigned short vid; |
153 | struct net_device_stats *stats; | |
154 | unsigned short vlan_TCI; | |
1da177e4 | 155 | |
2029cc2c PM |
156 | skb = skb_share_check(skb, GFP_ATOMIC); |
157 | if (skb == NULL) | |
31ffdbcb | 158 | goto err_free; |
e7c243c9 | 159 | |
31ffdbcb PM |
160 | if (unlikely(!pskb_may_pull(skb, VLAN_HLEN))) |
161 | goto err_free; | |
e7c243c9 | 162 | |
31ffdbcb | 163 | vhdr = (struct vlan_hdr *)skb->data; |
1da177e4 | 164 | vlan_TCI = ntohs(vhdr->h_vlan_TCI); |
1da177e4 LT |
165 | vid = (vlan_TCI & VLAN_VID_MASK); |
166 | ||
1da177e4 LT |
167 | rcu_read_lock(); |
168 | skb->dev = __find_vlan_dev(dev, vid); | |
169 | if (!skb->dev) { | |
2029cc2c | 170 | pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n", |
0dc47877 | 171 | __func__, (unsigned int)vid, dev->name); |
31ffdbcb | 172 | goto err_unlock; |
1da177e4 LT |
173 | } |
174 | ||
175 | skb->dev->last_rx = jiffies; | |
176 | ||
7bd38d77 | 177 | stats = &skb->dev->stats; |
1da177e4 LT |
178 | stats->rx_packets++; |
179 | stats->rx_bytes += skb->len; | |
180 | ||
cbb042f9 | 181 | skb_pull_rcsum(skb, VLAN_HLEN); |
a388442c | 182 | |
2029cc2c PM |
183 | skb->priority = vlan_get_ingress_priority(skb->dev, |
184 | ntohs(vhdr->h_vlan_TCI)); | |
1da177e4 | 185 | |
40f98e1a | 186 | pr_debug("%s: priority: %u for TCI: %hu\n", |
0dc47877 | 187 | __func__, skb->priority, ntohs(vhdr->h_vlan_TCI)); |
1da177e4 | 188 | |
1da177e4 LT |
189 | switch (skb->pkt_type) { |
190 | case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ | |
2029cc2c | 191 | /* stats->broadcast ++; // no such counter :-( */ |
1da177e4 LT |
192 | break; |
193 | ||
194 | case PACKET_MULTICAST: | |
195 | stats->multicast++; | |
196 | break; | |
197 | ||
122952fc | 198 | case PACKET_OTHERHOST: |
1da177e4 | 199 | /* Our lower layer thinks this is not local, let's make sure. |
2029cc2c PM |
200 | * This allows the VLAN to have a different MAC than the |
201 | * underlying device, and still route correctly. | |
1da177e4 | 202 | */ |
2029cc2c PM |
203 | if (!compare_ether_addr(eth_hdr(skb)->h_dest, |
204 | skb->dev->dev_addr)) | |
1da177e4 | 205 | skb->pkt_type = PACKET_HOST; |
1da177e4 LT |
206 | break; |
207 | default: | |
208 | break; | |
3ff50b79 | 209 | } |
1da177e4 | 210 | |
91b4f954 | 211 | vlan_set_encap_proto(skb, vhdr); |
1da177e4 | 212 | |
1da177e4 | 213 | skb = vlan_check_reorder_header(skb); |
31ffdbcb | 214 | if (!skb) { |
1da177e4 | 215 | stats->rx_errors++; |
31ffdbcb | 216 | goto err_unlock; |
1da177e4 | 217 | } |
31ffdbcb PM |
218 | |
219 | netif_rx(skb); | |
1da177e4 | 220 | rcu_read_unlock(); |
31ffdbcb PM |
221 | return NET_RX_SUCCESS; |
222 | ||
223 | err_unlock: | |
224 | rcu_read_unlock(); | |
225 | err_free: | |
226 | kfree_skb(skb); | |
227 | return NET_RX_DROP; | |
1da177e4 LT |
228 | } |
229 | ||
2029cc2c PM |
230 | static inline unsigned short |
231 | vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) | |
1da177e4 | 232 | { |
2029cc2c | 233 | struct vlan_priority_tci_mapping *mp; |
1da177e4 | 234 | |
2029cc2c | 235 | mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; |
1da177e4 LT |
236 | while (mp) { |
237 | if (mp->priority == skb->priority) { | |
2029cc2c PM |
238 | return mp->vlan_qos; /* This should already be shifted |
239 | * to mask correctly with the | |
240 | * VLAN's TCI */ | |
1da177e4 LT |
241 | } |
242 | mp = mp->next; | |
243 | } | |
244 | return 0; | |
245 | } | |
246 | ||
247 | /* | |
122952fc | 248 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
249 | * |
250 | * saddr=NULL means use device source address | |
251 | * daddr=NULL means leave destination address (eg unresolved arp) | |
252 | * | |
253 | * This is called when the SKB is moving down the stack towards the | |
254 | * physical devices. | |
255 | */ | |
ef3eb3e5 PM |
256 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
257 | unsigned short type, | |
258 | const void *daddr, const void *saddr, | |
259 | unsigned int len) | |
1da177e4 LT |
260 | { |
261 | struct vlan_hdr *vhdr; | |
262 | unsigned short veth_TCI = 0; | |
263 | int rc = 0; | |
264 | int build_vlan_header = 0; | |
2029cc2c | 265 | struct net_device *vdev = dev; |
1da177e4 | 266 | |
40f98e1a | 267 | pr_debug("%s: skb: %p type: %hx len: %u vlan_id: %hx, daddr: %p\n", |
0dc47877 | 268 | __func__, skb, type, len, vlan_dev_info(dev)->vlan_id, |
2029cc2c | 269 | daddr); |
1da177e4 LT |
270 | |
271 | /* build vlan header only if re_order_header flag is NOT set. This | |
272 | * fixes some programs that get confused when they see a VLAN device | |
273 | * sending a frame that is VLAN encoded (the consensus is that the VLAN | |
274 | * device should look completely like an Ethernet device when the | |
122952fc | 275 | * REORDER_HEADER flag is set) The drawback to this is some extra |
1da177e4 LT |
276 | * header shuffling in the hard_start_xmit. Users can turn off this |
277 | * REORDER behaviour with the vconfig tool. | |
278 | */ | |
9dfebcc6 | 279 | if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) |
a4bf3af4 | 280 | build_vlan_header = 1; |
1da177e4 LT |
281 | |
282 | if (build_vlan_header) { | |
283 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); | |
284 | ||
285 | /* build the four bytes that make this a VLAN header. */ | |
286 | ||
2029cc2c PM |
287 | /* Now, construct the second two bytes. This field looks |
288 | * something like: | |
1da177e4 LT |
289 | * usr_priority: 3 bits (high bits) |
290 | * CFI 1 bit | |
291 | * VLAN ID 12 bits (low bits) | |
292 | * | |
293 | */ | |
9dfebcc6 | 294 | veth_TCI = vlan_dev_info(dev)->vlan_id; |
1da177e4 LT |
295 | veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); |
296 | ||
297 | vhdr->h_vlan_TCI = htons(veth_TCI); | |
298 | ||
299 | /* | |
2029cc2c PM |
300 | * Set the protocol type. For a packet of type ETH_P_802_3 we |
301 | * put the length in here instead. It is up to the 802.2 | |
302 | * layer to carry protocol information. | |
1da177e4 LT |
303 | */ |
304 | ||
2029cc2c | 305 | if (type != ETH_P_802_3) |
1da177e4 | 306 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 307 | else |
1da177e4 | 308 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a JB |
309 | |
310 | skb->protocol = htons(ETH_P_8021Q); | |
1da177e4 LT |
311 | } |
312 | ||
313 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
314 | if (saddr == NULL) | |
315 | saddr = dev->dev_addr; | |
316 | ||
9dfebcc6 | 317 | dev = vlan_dev_info(dev)->real_dev; |
1da177e4 | 318 | |
2029cc2c PM |
319 | /* MPLS can send us skbuffs w/out enough space. This check will grow |
320 | * the skb if it doesn't have enough headroom. Not a beautiful solution, | |
321 | * so I'll tick a counter so that users can know it's happening... | |
322 | * If they care... | |
1da177e4 LT |
323 | */ |
324 | ||
2029cc2c PM |
325 | /* NOTE: This may still break if the underlying device is not the final |
326 | * device (and thus there are more headers to add...) It should work for | |
1da177e4 LT |
327 | * good-ole-ethernet though. |
328 | */ | |
329 | if (skb_headroom(skb) < dev->hard_header_len) { | |
330 | struct sk_buff *sk_tmp = skb; | |
331 | skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len); | |
332 | kfree_skb(sk_tmp); | |
333 | if (skb == NULL) { | |
7bd38d77 | 334 | struct net_device_stats *stats = &vdev->stats; |
1da177e4 LT |
335 | stats->tx_dropped++; |
336 | return -ENOMEM; | |
337 | } | |
9dfebcc6 | 338 | vlan_dev_info(vdev)->cnt_inc_headroom_on_tx++; |
0dc47877 | 339 | pr_debug("%s: %s: had to grow skb\n", __func__, vdev->name); |
1da177e4 LT |
340 | } |
341 | ||
342 | if (build_vlan_header) { | |
343 | /* Now make the underlying real hard header */ | |
0c4e8581 SH |
344 | rc = dev_hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, |
345 | len + VLAN_HLEN); | |
346 | if (rc > 0) | |
1da177e4 | 347 | rc += VLAN_HLEN; |
0c4e8581 | 348 | else if (rc < 0) |
1da177e4 | 349 | rc -= VLAN_HLEN; |
0c4e8581 | 350 | } else |
2029cc2c PM |
351 | /* If here, then we'll just make a normal looking ethernet |
352 | * frame, but, the hard_start_xmit method will insert the tag | |
353 | * (it has to be able to do this for bridged and other skbs | |
354 | * that don't come down the protocol stack in an orderly manner. | |
1da177e4 | 355 | */ |
0c4e8581 | 356 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len); |
1da177e4 LT |
357 | |
358 | return rc; | |
359 | } | |
360 | ||
ef3eb3e5 | 361 | static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 362 | { |
7bd38d77 | 363 | struct net_device_stats *stats = &dev->stats; |
1da177e4 | 364 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
55b01e86 | 365 | |
1da177e4 LT |
366 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
367 | * | |
368 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
369 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
370 | */ | |
371 | ||
6ab3b487 | 372 | if (veth->h_vlan_proto != htons(ETH_P_8021Q) || |
9dfebcc6 | 373 | vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { |
1da177e4 LT |
374 | int orig_headroom = skb_headroom(skb); |
375 | unsigned short veth_TCI; | |
376 | ||
377 | /* This is not a VLAN frame...but we can fix that! */ | |
9dfebcc6 | 378 | vlan_dev_info(dev)->cnt_encap_on_xmit++; |
1da177e4 | 379 | |
40f98e1a | 380 | pr_debug("%s: proto to encap: 0x%hx\n", |
577f99c1 | 381 | __func__, ntohs(veth->h_vlan_proto)); |
1da177e4 LT |
382 | /* Construct the second two bytes. This field looks something |
383 | * like: | |
384 | * usr_priority: 3 bits (high bits) | |
385 | * CFI 1 bit | |
386 | * VLAN ID 12 bits (low bits) | |
387 | */ | |
9dfebcc6 | 388 | veth_TCI = vlan_dev_info(dev)->vlan_id; |
1da177e4 LT |
389 | veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); |
390 | ||
391 | skb = __vlan_put_tag(skb, veth_TCI); | |
392 | if (!skb) { | |
393 | stats->tx_dropped++; | |
394 | return 0; | |
395 | } | |
396 | ||
2029cc2c | 397 | if (orig_headroom < VLAN_HLEN) |
9dfebcc6 | 398 | vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; |
1da177e4 LT |
399 | } |
400 | ||
40f98e1a | 401 | pr_debug("%s: about to send skb: %p to dev: %s\n", |
0dc47877 | 402 | __func__, skb, skb->dev->name); |
55b01e86 DM |
403 | pr_debug(" " MAC_FMT " " MAC_FMT " %4hx %4hx %4hx\n", |
404 | veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], | |
405 | veth->h_dest[3], veth->h_dest[4], veth->h_dest[5], | |
406 | veth->h_source[0], veth->h_source[1], veth->h_source[2], | |
407 | veth->h_source[3], veth->h_source[4], veth->h_source[5], | |
40f98e1a PM |
408 | veth->h_vlan_proto, veth->h_vlan_TCI, |
409 | veth->h_vlan_encapsulated_proto); | |
1da177e4 LT |
410 | |
411 | stats->tx_packets++; /* for statics only */ | |
412 | stats->tx_bytes += skb->len; | |
413 | ||
9dfebcc6 | 414 | skb->dev = vlan_dev_info(dev)->real_dev; |
1da177e4 LT |
415 | dev_queue_xmit(skb); |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
ef3eb3e5 PM |
420 | static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, |
421 | struct net_device *dev) | |
1da177e4 | 422 | { |
7bd38d77 | 423 | struct net_device_stats *stats = &dev->stats; |
1da177e4 LT |
424 | unsigned short veth_TCI; |
425 | ||
426 | /* Construct the second two bytes. This field looks something | |
427 | * like: | |
428 | * usr_priority: 3 bits (high bits) | |
429 | * CFI 1 bit | |
430 | * VLAN ID 12 bits (low bits) | |
431 | */ | |
9dfebcc6 | 432 | veth_TCI = vlan_dev_info(dev)->vlan_id; |
1da177e4 LT |
433 | veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); |
434 | skb = __vlan_hwaccel_put_tag(skb, veth_TCI); | |
435 | ||
436 | stats->tx_packets++; | |
437 | stats->tx_bytes += skb->len; | |
438 | ||
9dfebcc6 | 439 | skb->dev = vlan_dev_info(dev)->real_dev; |
1da177e4 LT |
440 | dev_queue_xmit(skb); |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
ef3eb3e5 | 445 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
446 | { |
447 | /* TODO: gotta make sure the underlying layer can handle it, | |
448 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
449 | */ | |
9dfebcc6 | 450 | if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
451 | return -ERANGE; |
452 | ||
453 | dev->mtu = new_mtu; | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
c17d8874 PM |
458 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
459 | u32 skb_prio, short vlan_prio) | |
1da177e4 | 460 | { |
9dfebcc6 | 461 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
b020cb48 PM |
462 | |
463 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
464 | vlan->nr_ingress_mappings--; | |
465 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
466 | vlan->nr_ingress_mappings++; | |
467 | ||
468 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
469 | } |
470 | ||
c17d8874 PM |
471 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
472 | u32 skb_prio, short vlan_prio) | |
1da177e4 | 473 | { |
9dfebcc6 | 474 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
1da177e4 LT |
475 | struct vlan_priority_tci_mapping *mp = NULL; |
476 | struct vlan_priority_tci_mapping *np; | |
b020cb48 | 477 | u32 vlan_qos = (vlan_prio << 13) & 0xE000; |
122952fc | 478 | |
c17d8874 | 479 | /* See if a priority mapping exists.. */ |
b020cb48 | 480 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
481 | while (mp) { |
482 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
483 | if (mp->vlan_qos && !vlan_qos) |
484 | vlan->nr_egress_mappings--; | |
485 | else if (!mp->vlan_qos && vlan_qos) | |
486 | vlan->nr_egress_mappings++; | |
487 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 488 | return 0; |
1da177e4 | 489 | } |
c17d8874 | 490 | mp = mp->next; |
1da177e4 | 491 | } |
c17d8874 PM |
492 | |
493 | /* Create a new mapping then. */ | |
b020cb48 | 494 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
495 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
496 | if (!np) | |
497 | return -ENOBUFS; | |
498 | ||
499 | np->next = mp; | |
500 | np->priority = skb_prio; | |
b020cb48 PM |
501 | np->vlan_qos = vlan_qos; |
502 | vlan->egress_priority_map[skb_prio & 0xF] = np; | |
503 | if (vlan_qos) | |
504 | vlan->nr_egress_mappings++; | |
c17d8874 | 505 | return 0; |
1da177e4 LT |
506 | } |
507 | ||
a4bf3af4 | 508 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 509 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 510 | { |
b3ce0325 PM |
511 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
512 | u32 old_flags = vlan->flags; | |
513 | ||
70c03b49 | 514 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP)) |
b3ce0325 PM |
515 | return -EINVAL; |
516 | ||
517 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
518 | |
519 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
520 | if (vlan->flags & VLAN_FLAG_GVRP) | |
521 | vlan_gvrp_request_join(dev); | |
522 | else | |
523 | vlan_gvrp_request_leave(dev); | |
524 | } | |
b3ce0325 | 525 | return 0; |
1da177e4 LT |
526 | } |
527 | ||
c17d8874 | 528 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 529 | { |
9dfebcc6 | 530 | strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); |
1da177e4 LT |
531 | } |
532 | ||
c17d8874 | 533 | void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result) |
1da177e4 | 534 | { |
9dfebcc6 | 535 | *result = vlan_dev_info(dev)->vlan_id; |
1da177e4 LT |
536 | } |
537 | ||
ef3eb3e5 | 538 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 539 | { |
9dfebcc6 | 540 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
8c979c26 PM |
541 | struct net_device *real_dev = vlan->real_dev; |
542 | int err; | |
543 | ||
544 | if (!(real_dev->flags & IFF_UP)) | |
1da177e4 LT |
545 | return -ENETDOWN; |
546 | ||
8c979c26 PM |
547 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { |
548 | err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); | |
549 | if (err < 0) | |
550 | return err; | |
551 | } | |
552 | memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); | |
553 | ||
6c78dcbd PM |
554 | if (dev->flags & IFF_ALLMULTI) |
555 | dev_set_allmulti(real_dev, 1); | |
556 | if (dev->flags & IFF_PROMISC) | |
557 | dev_set_promiscuity(real_dev, 1); | |
558 | ||
70c03b49 PM |
559 | if (vlan->flags & VLAN_FLAG_GVRP) |
560 | vlan_gvrp_request_join(dev); | |
561 | ||
1da177e4 LT |
562 | return 0; |
563 | } | |
564 | ||
ef3eb3e5 | 565 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 566 | { |
70c03b49 PM |
567 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
568 | struct net_device *real_dev = vlan->real_dev; | |
569 | ||
570 | if (vlan->flags & VLAN_FLAG_GVRP) | |
571 | vlan_gvrp_request_leave(dev); | |
8c979c26 | 572 | |
56addd6e | 573 | dev_mc_unsync(real_dev, dev); |
e83a2ea8 | 574 | dev_unicast_unsync(real_dev, dev); |
6c78dcbd PM |
575 | if (dev->flags & IFF_ALLMULTI) |
576 | dev_set_allmulti(real_dev, -1); | |
577 | if (dev->flags & IFF_PROMISC) | |
578 | dev_set_promiscuity(real_dev, -1); | |
579 | ||
8c979c26 PM |
580 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) |
581 | dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len); | |
582 | ||
1da177e4 LT |
583 | return 0; |
584 | } | |
585 | ||
ef3eb3e5 | 586 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 587 | { |
9dfebcc6 | 588 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
39aaac11 PM |
589 | struct sockaddr *addr = p; |
590 | int err; | |
591 | ||
592 | if (!is_valid_ether_addr(addr->sa_data)) | |
593 | return -EADDRNOTAVAIL; | |
594 | ||
595 | if (!(dev->flags & IFF_UP)) | |
596 | goto out; | |
597 | ||
598 | if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { | |
599 | err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN); | |
600 | if (err < 0) | |
601 | return err; | |
602 | } | |
603 | ||
604 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) | |
605 | dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); | |
606 | ||
607 | out: | |
608 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
609 | return 0; | |
610 | } | |
611 | ||
ef3eb3e5 | 612 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 613 | { |
9dfebcc6 | 614 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
1da177e4 LT |
615 | struct ifreq ifrr; |
616 | int err = -EOPNOTSUPP; | |
617 | ||
618 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
619 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
620 | ||
2029cc2c | 621 | switch (cmd) { |
1da177e4 LT |
622 | case SIOCGMIIPHY: |
623 | case SIOCGMIIREG: | |
624 | case SIOCSMIIREG: | |
122952fc | 625 | if (real_dev->do_ioctl && netif_device_present(real_dev)) |
1da177e4 LT |
626 | err = real_dev->do_ioctl(real_dev, &ifrr, cmd); |
627 | break; | |
1da177e4 LT |
628 | } |
629 | ||
122952fc | 630 | if (!err) |
1da177e4 LT |
631 | ifr->ifr_ifru = ifrr.ifr_ifru; |
632 | ||
633 | return err; | |
634 | } | |
635 | ||
ef3eb3e5 | 636 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 637 | { |
9dfebcc6 | 638 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
6c78dcbd PM |
639 | |
640 | if (change & IFF_ALLMULTI) | |
641 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
642 | if (change & IFF_PROMISC) | |
643 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
644 | } | |
645 | ||
e83a2ea8 | 646 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 647 | { |
9dfebcc6 | 648 | dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
e83a2ea8 | 649 | dev_unicast_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
1da177e4 | 650 | } |
ef3eb3e5 PM |
651 | |
652 | /* | |
653 | * vlan network devices have devices nesting below it, and are a special | |
654 | * "super class" of normal network devices; split their locks off into a | |
655 | * separate class since they always nest. | |
656 | */ | |
657 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
658 | ||
659 | static const struct header_ops vlan_header_ops = { | |
660 | .create = vlan_dev_hard_header, | |
661 | .rebuild = vlan_dev_rebuild_header, | |
662 | .parse = eth_header_parse, | |
663 | }; | |
664 | ||
665 | static int vlan_dev_init(struct net_device *dev) | |
666 | { | |
9dfebcc6 | 667 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
ef3eb3e5 PM |
668 | int subclass = 0; |
669 | ||
670 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ | |
0ed21b32 | 671 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI); |
ef3eb3e5 PM |
672 | dev->iflink = real_dev->ifindex; |
673 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
674 | (1<<__LINK_STATE_DORMANT))) | | |
675 | (1<<__LINK_STATE_PRESENT); | |
676 | ||
289c79a4 | 677 | dev->features |= real_dev->features & real_dev->vlan_features; |
5fb13570 | 678 | |
ef3eb3e5 PM |
679 | /* ipv6 shared card related stuff */ |
680 | dev->dev_id = real_dev->dev_id; | |
681 | ||
682 | if (is_zero_ether_addr(dev->dev_addr)) | |
683 | memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); | |
684 | if (is_zero_ether_addr(dev->broadcast)) | |
685 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
686 | ||
687 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { | |
688 | dev->header_ops = real_dev->header_ops; | |
689 | dev->hard_header_len = real_dev->hard_header_len; | |
690 | dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; | |
691 | } else { | |
692 | dev->header_ops = &vlan_header_ops; | |
693 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
694 | dev->hard_start_xmit = vlan_dev_hard_start_xmit; | |
695 | } | |
696 | ||
26a25239 | 697 | if (is_vlan_dev(real_dev)) |
ef3eb3e5 PM |
698 | subclass = 1; |
699 | ||
700 | lockdep_set_class_and_subclass(&dev->_xmit_lock, | |
701 | &vlan_netdev_xmit_lock_key, subclass); | |
702 | return 0; | |
703 | } | |
704 | ||
23556323 PE |
705 | static void vlan_dev_uninit(struct net_device *dev) |
706 | { | |
707 | struct vlan_priority_tci_mapping *pm; | |
708 | struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
709 | int i; | |
710 | ||
711 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { | |
712 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
713 | vlan->egress_priority_map[i] = pm->next; | |
714 | kfree(pm); | |
715 | } | |
716 | } | |
717 | } | |
718 | ||
ef3eb3e5 PM |
719 | void vlan_setup(struct net_device *dev) |
720 | { | |
721 | ether_setup(dev); | |
722 | ||
723 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
724 | dev->tx_queue_len = 0; | |
725 | ||
726 | dev->change_mtu = vlan_dev_change_mtu; | |
727 | dev->init = vlan_dev_init; | |
23556323 | 728 | dev->uninit = vlan_dev_uninit; |
ef3eb3e5 PM |
729 | dev->open = vlan_dev_open; |
730 | dev->stop = vlan_dev_stop; | |
731 | dev->set_mac_address = vlan_dev_set_mac_address; | |
e83a2ea8 CL |
732 | dev->set_rx_mode = vlan_dev_set_rx_mode; |
733 | dev->set_multicast_list = vlan_dev_set_rx_mode; | |
ef3eb3e5 PM |
734 | dev->change_rx_flags = vlan_dev_change_rx_flags; |
735 | dev->do_ioctl = vlan_dev_ioctl; | |
736 | dev->destructor = free_netdev; | |
737 | ||
738 | memset(dev->broadcast, 0, ETH_ALEN); | |
739 | } |