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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> | |
75b8846a | 31 | #include <linux/ethtool.h> |
1da177e4 LT |
32 | #include <net/datalink.h> |
33 | #include <net/p8022.h> | |
34 | #include <net/arp.h> | |
35 | ||
36 | #include "vlan.h" | |
37 | #include "vlanproc.h" | |
38 | #include <linux/if_vlan.h> | |
39 | #include <net/ip.h> | |
40 | ||
41 | /* | |
42 | * Rebuild the Ethernet MAC header. This is called after an ARP | |
43 | * (or in future other address resolution) has completed on this | |
44 | * sk_buff. We now let ARP fill in the other fields. | |
45 | * | |
46 | * This routine CANNOT use cached dst->neigh! | |
47 | * Really, it is used only when dst->neigh is wrong. | |
48 | * | |
49 | * TODO: This needs a checkup, I'm ignorant here. --BLG | |
50 | */ | |
ef3eb3e5 | 51 | static int vlan_dev_rebuild_header(struct sk_buff *skb) |
1da177e4 LT |
52 | { |
53 | struct net_device *dev = skb->dev; | |
54 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); | |
55 | ||
56 | switch (veth->h_vlan_encapsulated_proto) { | |
57 | #ifdef CONFIG_INET | |
58 | case __constant_htons(ETH_P_IP): | |
59 | ||
60 | /* TODO: Confirm this will work with VLAN headers... */ | |
61 | return arp_find(veth->h_dest, skb); | |
122952fc | 62 | #endif |
1da177e4 | 63 | default: |
40f98e1a PM |
64 | pr_debug("%s: unable to resolve type %X addresses.\n", |
65 | dev->name, ntohs(veth->h_vlan_encapsulated_proto)); | |
122952fc | 66 | |
1da177e4 LT |
67 | memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); |
68 | break; | |
3ff50b79 | 69 | } |
1da177e4 LT |
70 | |
71 | return 0; | |
72 | } | |
73 | ||
74 | static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb) | |
75 | { | |
9dfebcc6 | 76 | if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) { |
1da177e4 LT |
77 | if (skb_shared(skb) || skb_cloned(skb)) { |
78 | struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC); | |
79 | kfree_skb(skb); | |
80 | skb = nskb; | |
81 | } | |
82 | if (skb) { | |
83 | /* Lifted from Gleb's VLAN code... */ | |
84 | memmove(skb->data - ETH_HLEN, | |
85 | skb->data - VLAN_ETH_HLEN, 12); | |
b0e380b1 | 86 | skb->mac_header += VLAN_HLEN; |
1da177e4 LT |
87 | } |
88 | } | |
89 | ||
90 | return skb; | |
91 | } | |
92 | ||
91b4f954 PE |
93 | static inline void vlan_set_encap_proto(struct sk_buff *skb, |
94 | struct vlan_hdr *vhdr) | |
95 | { | |
96 | __be16 proto; | |
97 | unsigned char *rawp; | |
98 | ||
99 | /* | |
100 | * Was a VLAN packet, grab the encapsulated protocol, which the layer | |
101 | * three protocols care about. | |
102 | */ | |
103 | ||
104 | proto = vhdr->h_vlan_encapsulated_proto; | |
105 | if (ntohs(proto) >= 1536) { | |
106 | skb->protocol = proto; | |
107 | return; | |
108 | } | |
109 | ||
110 | rawp = skb->data; | |
111 | if (*(unsigned short *)rawp == 0xFFFF) | |
112 | /* | |
113 | * This is a magic hack to spot IPX packets. Older Novell | |
114 | * breaks the protocol design and runs IPX over 802.3 without | |
115 | * an 802.2 LLC layer. We look for FFFF which isn't a used | |
116 | * 802.2 SSAP/DSAP. This won't work for fault tolerant netware | |
117 | * but does for the rest. | |
118 | */ | |
119 | skb->protocol = htons(ETH_P_802_3); | |
120 | else | |
121 | /* | |
122 | * Real 802.2 LLC | |
123 | */ | |
124 | skb->protocol = htons(ETH_P_802_2); | |
125 | } | |
126 | ||
1da177e4 | 127 | /* |
122952fc | 128 | * Determine the packet's protocol ID. The rule here is that we |
1da177e4 LT |
129 | * assume 802.3 if the type field is short enough to be a length. |
130 | * This is normal practice and works for any 'now in use' protocol. | |
131 | * | |
132 | * Also, at this point we assume that we ARE dealing exclusively with | |
133 | * VLAN packets, or packets that should be made into VLAN packets based | |
134 | * on a default VLAN ID. | |
135 | * | |
136 | * NOTE: Should be similar to ethernet/eth.c. | |
137 | * | |
138 | * SANITY NOTE: This method is called when a packet is moving up the stack | |
139 | * towards userland. To get here, it would have already passed | |
140 | * through the ethernet/eth.c eth_type_trans() method. | |
141 | * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be | |
142 | * stored UNALIGNED in the memory. RISC systems don't like | |
143 | * such cases very much... | |
2029cc2c PM |
144 | * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be |
145 | * aligned, so there doesn't need to be any of the unaligned | |
146 | * stuff. It has been commented out now... --Ben | |
1da177e4 LT |
147 | * |
148 | */ | |
149 | int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, | |
2029cc2c | 150 | struct packet_type *ptype, struct net_device *orig_dev) |
1da177e4 | 151 | { |
e7c243c9 | 152 | struct vlan_hdr *vhdr; |
1da177e4 LT |
153 | unsigned short vid; |
154 | struct net_device_stats *stats; | |
155 | unsigned short vlan_TCI; | |
1da177e4 | 156 | |
2029cc2c PM |
157 | skb = skb_share_check(skb, GFP_ATOMIC); |
158 | if (skb == NULL) | |
31ffdbcb | 159 | goto err_free; |
e7c243c9 | 160 | |
31ffdbcb PM |
161 | if (unlikely(!pskb_may_pull(skb, VLAN_HLEN))) |
162 | goto err_free; | |
e7c243c9 | 163 | |
31ffdbcb | 164 | vhdr = (struct vlan_hdr *)skb->data; |
1da177e4 | 165 | vlan_TCI = ntohs(vhdr->h_vlan_TCI); |
1da177e4 LT |
166 | vid = (vlan_TCI & VLAN_VID_MASK); |
167 | ||
1da177e4 LT |
168 | rcu_read_lock(); |
169 | skb->dev = __find_vlan_dev(dev, vid); | |
170 | if (!skb->dev) { | |
2029cc2c | 171 | pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n", |
0dc47877 | 172 | __func__, (unsigned int)vid, dev->name); |
31ffdbcb | 173 | goto err_unlock; |
1da177e4 LT |
174 | } |
175 | ||
176 | skb->dev->last_rx = jiffies; | |
177 | ||
7bd38d77 | 178 | stats = &skb->dev->stats; |
1da177e4 LT |
179 | stats->rx_packets++; |
180 | stats->rx_bytes += skb->len; | |
181 | ||
cbb042f9 | 182 | skb_pull_rcsum(skb, VLAN_HLEN); |
a388442c | 183 | |
2029cc2c PM |
184 | skb->priority = vlan_get_ingress_priority(skb->dev, |
185 | ntohs(vhdr->h_vlan_TCI)); | |
1da177e4 | 186 | |
40f98e1a | 187 | pr_debug("%s: priority: %u for TCI: %hu\n", |
0dc47877 | 188 | __func__, skb->priority, ntohs(vhdr->h_vlan_TCI)); |
1da177e4 | 189 | |
1da177e4 LT |
190 | switch (skb->pkt_type) { |
191 | case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ | |
2029cc2c | 192 | /* stats->broadcast ++; // no such counter :-( */ |
1da177e4 LT |
193 | break; |
194 | ||
195 | case PACKET_MULTICAST: | |
196 | stats->multicast++; | |
197 | break; | |
198 | ||
122952fc | 199 | case PACKET_OTHERHOST: |
1da177e4 | 200 | /* Our lower layer thinks this is not local, let's make sure. |
2029cc2c PM |
201 | * This allows the VLAN to have a different MAC than the |
202 | * underlying device, and still route correctly. | |
1da177e4 | 203 | */ |
2029cc2c PM |
204 | if (!compare_ether_addr(eth_hdr(skb)->h_dest, |
205 | skb->dev->dev_addr)) | |
1da177e4 | 206 | skb->pkt_type = PACKET_HOST; |
1da177e4 LT |
207 | break; |
208 | default: | |
209 | break; | |
3ff50b79 | 210 | } |
1da177e4 | 211 | |
91b4f954 | 212 | vlan_set_encap_proto(skb, vhdr); |
1da177e4 | 213 | |
1da177e4 | 214 | skb = vlan_check_reorder_header(skb); |
31ffdbcb | 215 | if (!skb) { |
1da177e4 | 216 | stats->rx_errors++; |
31ffdbcb | 217 | goto err_unlock; |
1da177e4 | 218 | } |
31ffdbcb PM |
219 | |
220 | netif_rx(skb); | |
1da177e4 | 221 | rcu_read_unlock(); |
31ffdbcb PM |
222 | return NET_RX_SUCCESS; |
223 | ||
224 | err_unlock: | |
225 | rcu_read_unlock(); | |
226 | err_free: | |
227 | kfree_skb(skb); | |
228 | return NET_RX_DROP; | |
1da177e4 LT |
229 | } |
230 | ||
2029cc2c PM |
231 | static inline unsigned short |
232 | vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) | |
1da177e4 | 233 | { |
2029cc2c | 234 | struct vlan_priority_tci_mapping *mp; |
1da177e4 | 235 | |
2029cc2c | 236 | mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; |
1da177e4 LT |
237 | while (mp) { |
238 | if (mp->priority == skb->priority) { | |
2029cc2c PM |
239 | return mp->vlan_qos; /* This should already be shifted |
240 | * to mask correctly with the | |
241 | * VLAN's TCI */ | |
1da177e4 LT |
242 | } |
243 | mp = mp->next; | |
244 | } | |
245 | return 0; | |
246 | } | |
247 | ||
248 | /* | |
122952fc | 249 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
250 | * |
251 | * saddr=NULL means use device source address | |
252 | * daddr=NULL means leave destination address (eg unresolved arp) | |
253 | * | |
254 | * This is called when the SKB is moving down the stack towards the | |
255 | * physical devices. | |
256 | */ | |
ef3eb3e5 PM |
257 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
258 | unsigned short type, | |
259 | const void *daddr, const void *saddr, | |
260 | unsigned int len) | |
1da177e4 LT |
261 | { |
262 | struct vlan_hdr *vhdr; | |
263 | unsigned short veth_TCI = 0; | |
264 | int rc = 0; | |
265 | int build_vlan_header = 0; | |
2029cc2c | 266 | struct net_device *vdev = dev; |
1da177e4 | 267 | |
40f98e1a | 268 | pr_debug("%s: skb: %p type: %hx len: %u vlan_id: %hx, daddr: %p\n", |
0dc47877 | 269 | __func__, skb, type, len, vlan_dev_info(dev)->vlan_id, |
2029cc2c | 270 | daddr); |
1da177e4 LT |
271 | |
272 | /* build vlan header only if re_order_header flag is NOT set. This | |
273 | * fixes some programs that get confused when they see a VLAN device | |
274 | * sending a frame that is VLAN encoded (the consensus is that the VLAN | |
275 | * device should look completely like an Ethernet device when the | |
122952fc | 276 | * REORDER_HEADER flag is set) The drawback to this is some extra |
1da177e4 LT |
277 | * header shuffling in the hard_start_xmit. Users can turn off this |
278 | * REORDER behaviour with the vconfig tool. | |
279 | */ | |
9dfebcc6 | 280 | if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) |
a4bf3af4 | 281 | build_vlan_header = 1; |
1da177e4 LT |
282 | |
283 | if (build_vlan_header) { | |
284 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); | |
285 | ||
286 | /* build the four bytes that make this a VLAN header. */ | |
287 | ||
2029cc2c PM |
288 | /* Now, construct the second two bytes. This field looks |
289 | * something like: | |
1da177e4 LT |
290 | * usr_priority: 3 bits (high bits) |
291 | * CFI 1 bit | |
292 | * VLAN ID 12 bits (low bits) | |
293 | * | |
294 | */ | |
9dfebcc6 | 295 | veth_TCI = vlan_dev_info(dev)->vlan_id; |
1da177e4 LT |
296 | veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); |
297 | ||
298 | vhdr->h_vlan_TCI = htons(veth_TCI); | |
299 | ||
300 | /* | |
2029cc2c PM |
301 | * Set the protocol type. For a packet of type ETH_P_802_3 we |
302 | * put the length in here instead. It is up to the 802.2 | |
303 | * layer to carry protocol information. | |
1da177e4 LT |
304 | */ |
305 | ||
2029cc2c | 306 | if (type != ETH_P_802_3) |
1da177e4 | 307 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 308 | else |
1da177e4 | 309 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a JB |
310 | |
311 | skb->protocol = htons(ETH_P_8021Q); | |
1da177e4 LT |
312 | } |
313 | ||
314 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
315 | if (saddr == NULL) | |
316 | saddr = dev->dev_addr; | |
317 | ||
9dfebcc6 | 318 | dev = vlan_dev_info(dev)->real_dev; |
1da177e4 | 319 | |
2029cc2c PM |
320 | /* MPLS can send us skbuffs w/out enough space. This check will grow |
321 | * the skb if it doesn't have enough headroom. Not a beautiful solution, | |
322 | * so I'll tick a counter so that users can know it's happening... | |
323 | * If they care... | |
1da177e4 LT |
324 | */ |
325 | ||
2029cc2c PM |
326 | /* NOTE: This may still break if the underlying device is not the final |
327 | * device (and thus there are more headers to add...) It should work for | |
1da177e4 LT |
328 | * good-ole-ethernet though. |
329 | */ | |
330 | if (skb_headroom(skb) < dev->hard_header_len) { | |
331 | struct sk_buff *sk_tmp = skb; | |
332 | skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len); | |
333 | kfree_skb(sk_tmp); | |
334 | if (skb == NULL) { | |
7bd38d77 | 335 | struct net_device_stats *stats = &vdev->stats; |
1da177e4 LT |
336 | stats->tx_dropped++; |
337 | return -ENOMEM; | |
338 | } | |
9dfebcc6 | 339 | vlan_dev_info(vdev)->cnt_inc_headroom_on_tx++; |
0dc47877 | 340 | pr_debug("%s: %s: had to grow skb\n", __func__, vdev->name); |
1da177e4 LT |
341 | } |
342 | ||
343 | if (build_vlan_header) { | |
344 | /* Now make the underlying real hard header */ | |
0c4e8581 SH |
345 | rc = dev_hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, |
346 | len + VLAN_HLEN); | |
347 | if (rc > 0) | |
1da177e4 | 348 | rc += VLAN_HLEN; |
0c4e8581 | 349 | else if (rc < 0) |
1da177e4 | 350 | rc -= VLAN_HLEN; |
0c4e8581 | 351 | } else |
2029cc2c PM |
352 | /* If here, then we'll just make a normal looking ethernet |
353 | * frame, but, the hard_start_xmit method will insert the tag | |
354 | * (it has to be able to do this for bridged and other skbs | |
355 | * that don't come down the protocol stack in an orderly manner. | |
1da177e4 | 356 | */ |
0c4e8581 | 357 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len); |
1da177e4 LT |
358 | |
359 | return rc; | |
360 | } | |
361 | ||
ef3eb3e5 | 362 | static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 363 | { |
7bd38d77 | 364 | struct net_device_stats *stats = &dev->stats; |
1da177e4 | 365 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
55b01e86 | 366 | |
1da177e4 LT |
367 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
368 | * | |
369 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
370 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
371 | */ | |
372 | ||
6ab3b487 | 373 | if (veth->h_vlan_proto != htons(ETH_P_8021Q) || |
9dfebcc6 | 374 | vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { |
1da177e4 LT |
375 | int orig_headroom = skb_headroom(skb); |
376 | unsigned short veth_TCI; | |
377 | ||
378 | /* This is not a VLAN frame...but we can fix that! */ | |
9dfebcc6 | 379 | vlan_dev_info(dev)->cnt_encap_on_xmit++; |
1da177e4 | 380 | |
40f98e1a | 381 | pr_debug("%s: proto to encap: 0x%hx\n", |
577f99c1 | 382 | __func__, ntohs(veth->h_vlan_proto)); |
1da177e4 LT |
383 | /* Construct the second two bytes. This field looks something |
384 | * like: | |
385 | * usr_priority: 3 bits (high bits) | |
386 | * CFI 1 bit | |
387 | * VLAN ID 12 bits (low bits) | |
388 | */ | |
9dfebcc6 | 389 | veth_TCI = vlan_dev_info(dev)->vlan_id; |
1da177e4 LT |
390 | veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); |
391 | ||
392 | skb = __vlan_put_tag(skb, veth_TCI); | |
393 | if (!skb) { | |
394 | stats->tx_dropped++; | |
395 | return 0; | |
396 | } | |
397 | ||
2029cc2c | 398 | if (orig_headroom < VLAN_HLEN) |
9dfebcc6 | 399 | vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; |
1da177e4 LT |
400 | } |
401 | ||
40f98e1a | 402 | pr_debug("%s: about to send skb: %p to dev: %s\n", |
0dc47877 | 403 | __func__, skb, skb->dev->name); |
55b01e86 DM |
404 | pr_debug(" " MAC_FMT " " MAC_FMT " %4hx %4hx %4hx\n", |
405 | veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], | |
406 | veth->h_dest[3], veth->h_dest[4], veth->h_dest[5], | |
407 | veth->h_source[0], veth->h_source[1], veth->h_source[2], | |
408 | veth->h_source[3], veth->h_source[4], veth->h_source[5], | |
40f98e1a PM |
409 | veth->h_vlan_proto, veth->h_vlan_TCI, |
410 | veth->h_vlan_encapsulated_proto); | |
1da177e4 LT |
411 | |
412 | stats->tx_packets++; /* for statics only */ | |
413 | stats->tx_bytes += skb->len; | |
414 | ||
9dfebcc6 | 415 | skb->dev = vlan_dev_info(dev)->real_dev; |
1da177e4 LT |
416 | dev_queue_xmit(skb); |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
ef3eb3e5 PM |
421 | static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, |
422 | struct net_device *dev) | |
1da177e4 | 423 | { |
7bd38d77 | 424 | struct net_device_stats *stats = &dev->stats; |
1da177e4 LT |
425 | unsigned short veth_TCI; |
426 | ||
427 | /* Construct the second two bytes. This field looks something | |
428 | * like: | |
429 | * usr_priority: 3 bits (high bits) | |
430 | * CFI 1 bit | |
431 | * VLAN ID 12 bits (low bits) | |
432 | */ | |
9dfebcc6 | 433 | veth_TCI = vlan_dev_info(dev)->vlan_id; |
1da177e4 LT |
434 | veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); |
435 | skb = __vlan_hwaccel_put_tag(skb, veth_TCI); | |
436 | ||
437 | stats->tx_packets++; | |
438 | stats->tx_bytes += skb->len; | |
439 | ||
9dfebcc6 | 440 | skb->dev = vlan_dev_info(dev)->real_dev; |
1da177e4 LT |
441 | dev_queue_xmit(skb); |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
ef3eb3e5 | 446 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
447 | { |
448 | /* TODO: gotta make sure the underlying layer can handle it, | |
449 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
450 | */ | |
9dfebcc6 | 451 | if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
452 | return -ERANGE; |
453 | ||
454 | dev->mtu = new_mtu; | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
c17d8874 PM |
459 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
460 | u32 skb_prio, short vlan_prio) | |
1da177e4 | 461 | { |
9dfebcc6 | 462 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
b020cb48 PM |
463 | |
464 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
465 | vlan->nr_ingress_mappings--; | |
466 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
467 | vlan->nr_ingress_mappings++; | |
468 | ||
469 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
470 | } |
471 | ||
c17d8874 PM |
472 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
473 | u32 skb_prio, short vlan_prio) | |
1da177e4 | 474 | { |
9dfebcc6 | 475 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
1da177e4 LT |
476 | struct vlan_priority_tci_mapping *mp = NULL; |
477 | struct vlan_priority_tci_mapping *np; | |
b020cb48 | 478 | u32 vlan_qos = (vlan_prio << 13) & 0xE000; |
122952fc | 479 | |
c17d8874 | 480 | /* See if a priority mapping exists.. */ |
b020cb48 | 481 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
482 | while (mp) { |
483 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
484 | if (mp->vlan_qos && !vlan_qos) |
485 | vlan->nr_egress_mappings--; | |
486 | else if (!mp->vlan_qos && vlan_qos) | |
487 | vlan->nr_egress_mappings++; | |
488 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 489 | return 0; |
1da177e4 | 490 | } |
c17d8874 | 491 | mp = mp->next; |
1da177e4 | 492 | } |
c17d8874 PM |
493 | |
494 | /* Create a new mapping then. */ | |
b020cb48 | 495 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
496 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
497 | if (!np) | |
498 | return -ENOBUFS; | |
499 | ||
500 | np->next = mp; | |
501 | np->priority = skb_prio; | |
b020cb48 PM |
502 | np->vlan_qos = vlan_qos; |
503 | vlan->egress_priority_map[skb_prio & 0xF] = np; | |
504 | if (vlan_qos) | |
505 | vlan->nr_egress_mappings++; | |
c17d8874 | 506 | return 0; |
1da177e4 LT |
507 | } |
508 | ||
a4bf3af4 | 509 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 510 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 511 | { |
b3ce0325 PM |
512 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
513 | u32 old_flags = vlan->flags; | |
514 | ||
70c03b49 | 515 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP)) |
b3ce0325 PM |
516 | return -EINVAL; |
517 | ||
518 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
519 | |
520 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
521 | if (vlan->flags & VLAN_FLAG_GVRP) | |
522 | vlan_gvrp_request_join(dev); | |
523 | else | |
524 | vlan_gvrp_request_leave(dev); | |
525 | } | |
b3ce0325 | 526 | return 0; |
1da177e4 LT |
527 | } |
528 | ||
c17d8874 | 529 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 530 | { |
9dfebcc6 | 531 | strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); |
1da177e4 LT |
532 | } |
533 | ||
ef3eb3e5 | 534 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 535 | { |
9dfebcc6 | 536 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
8c979c26 PM |
537 | struct net_device *real_dev = vlan->real_dev; |
538 | int err; | |
539 | ||
540 | if (!(real_dev->flags & IFF_UP)) | |
1da177e4 LT |
541 | return -ENETDOWN; |
542 | ||
8c979c26 PM |
543 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { |
544 | err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); | |
545 | if (err < 0) | |
546 | return err; | |
547 | } | |
548 | memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); | |
549 | ||
6c78dcbd PM |
550 | if (dev->flags & IFF_ALLMULTI) |
551 | dev_set_allmulti(real_dev, 1); | |
552 | if (dev->flags & IFF_PROMISC) | |
553 | dev_set_promiscuity(real_dev, 1); | |
554 | ||
70c03b49 PM |
555 | if (vlan->flags & VLAN_FLAG_GVRP) |
556 | vlan_gvrp_request_join(dev); | |
557 | ||
1da177e4 LT |
558 | return 0; |
559 | } | |
560 | ||
ef3eb3e5 | 561 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 562 | { |
70c03b49 PM |
563 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
564 | struct net_device *real_dev = vlan->real_dev; | |
565 | ||
566 | if (vlan->flags & VLAN_FLAG_GVRP) | |
567 | vlan_gvrp_request_leave(dev); | |
8c979c26 | 568 | |
56addd6e | 569 | dev_mc_unsync(real_dev, dev); |
e83a2ea8 | 570 | dev_unicast_unsync(real_dev, dev); |
6c78dcbd PM |
571 | if (dev->flags & IFF_ALLMULTI) |
572 | dev_set_allmulti(real_dev, -1); | |
573 | if (dev->flags & IFF_PROMISC) | |
574 | dev_set_promiscuity(real_dev, -1); | |
575 | ||
8c979c26 PM |
576 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) |
577 | dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len); | |
578 | ||
1da177e4 LT |
579 | return 0; |
580 | } | |
581 | ||
ef3eb3e5 | 582 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 583 | { |
9dfebcc6 | 584 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
39aaac11 PM |
585 | struct sockaddr *addr = p; |
586 | int err; | |
587 | ||
588 | if (!is_valid_ether_addr(addr->sa_data)) | |
589 | return -EADDRNOTAVAIL; | |
590 | ||
591 | if (!(dev->flags & IFF_UP)) | |
592 | goto out; | |
593 | ||
594 | if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { | |
595 | err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN); | |
596 | if (err < 0) | |
597 | return err; | |
598 | } | |
599 | ||
600 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) | |
601 | dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); | |
602 | ||
603 | out: | |
604 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
605 | return 0; | |
606 | } | |
607 | ||
ef3eb3e5 | 608 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 609 | { |
9dfebcc6 | 610 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
1da177e4 LT |
611 | struct ifreq ifrr; |
612 | int err = -EOPNOTSUPP; | |
613 | ||
614 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
615 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
616 | ||
2029cc2c | 617 | switch (cmd) { |
1da177e4 LT |
618 | case SIOCGMIIPHY: |
619 | case SIOCGMIIREG: | |
620 | case SIOCSMIIREG: | |
122952fc | 621 | if (real_dev->do_ioctl && netif_device_present(real_dev)) |
1da177e4 LT |
622 | err = real_dev->do_ioctl(real_dev, &ifrr, cmd); |
623 | break; | |
1da177e4 LT |
624 | } |
625 | ||
122952fc | 626 | if (!err) |
1da177e4 LT |
627 | ifr->ifr_ifru = ifrr.ifr_ifru; |
628 | ||
629 | return err; | |
630 | } | |
631 | ||
ef3eb3e5 | 632 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 633 | { |
9dfebcc6 | 634 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
6c78dcbd PM |
635 | |
636 | if (change & IFF_ALLMULTI) | |
637 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
638 | if (change & IFF_PROMISC) | |
639 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
640 | } | |
641 | ||
e83a2ea8 | 642 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 643 | { |
9dfebcc6 | 644 | dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
e83a2ea8 | 645 | dev_unicast_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
1da177e4 | 646 | } |
ef3eb3e5 PM |
647 | |
648 | /* | |
649 | * vlan network devices have devices nesting below it, and are a special | |
650 | * "super class" of normal network devices; split their locks off into a | |
651 | * separate class since they always nest. | |
652 | */ | |
653 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
654 | ||
655 | static const struct header_ops vlan_header_ops = { | |
656 | .create = vlan_dev_hard_header, | |
657 | .rebuild = vlan_dev_rebuild_header, | |
658 | .parse = eth_header_parse, | |
659 | }; | |
660 | ||
661 | static int vlan_dev_init(struct net_device *dev) | |
662 | { | |
9dfebcc6 | 663 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
ef3eb3e5 PM |
664 | int subclass = 0; |
665 | ||
666 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ | |
0ed21b32 | 667 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI); |
ef3eb3e5 PM |
668 | dev->iflink = real_dev->ifindex; |
669 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
670 | (1<<__LINK_STATE_DORMANT))) | | |
671 | (1<<__LINK_STATE_PRESENT); | |
672 | ||
289c79a4 | 673 | dev->features |= real_dev->features & real_dev->vlan_features; |
5fb13570 | 674 | |
ef3eb3e5 PM |
675 | /* ipv6 shared card related stuff */ |
676 | dev->dev_id = real_dev->dev_id; | |
677 | ||
678 | if (is_zero_ether_addr(dev->dev_addr)) | |
679 | memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); | |
680 | if (is_zero_ether_addr(dev->broadcast)) | |
681 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
682 | ||
683 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { | |
684 | dev->header_ops = real_dev->header_ops; | |
685 | dev->hard_header_len = real_dev->hard_header_len; | |
686 | dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; | |
687 | } else { | |
688 | dev->header_ops = &vlan_header_ops; | |
689 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
690 | dev->hard_start_xmit = vlan_dev_hard_start_xmit; | |
691 | } | |
692 | ||
26a25239 | 693 | if (is_vlan_dev(real_dev)) |
ef3eb3e5 PM |
694 | subclass = 1; |
695 | ||
696 | lockdep_set_class_and_subclass(&dev->_xmit_lock, | |
697 | &vlan_netdev_xmit_lock_key, subclass); | |
698 | return 0; | |
699 | } | |
700 | ||
23556323 PE |
701 | static void vlan_dev_uninit(struct net_device *dev) |
702 | { | |
703 | struct vlan_priority_tci_mapping *pm; | |
704 | struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
705 | int i; | |
706 | ||
707 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { | |
708 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
709 | vlan->egress_priority_map[i] = pm->next; | |
710 | kfree(pm); | |
711 | } | |
712 | } | |
713 | } | |
714 | ||
75b8846a PM |
715 | static u32 vlan_ethtool_get_rx_csum(struct net_device *dev) |
716 | { | |
717 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
718 | struct net_device *real_dev = vlan->real_dev; | |
719 | ||
720 | if (real_dev->ethtool_ops == NULL || | |
721 | real_dev->ethtool_ops->get_rx_csum == NULL) | |
722 | return 0; | |
723 | return real_dev->ethtool_ops->get_rx_csum(real_dev); | |
724 | } | |
725 | ||
726 | static const struct ethtool_ops vlan_ethtool_ops = { | |
727 | .get_link = ethtool_op_get_link, | |
728 | .get_rx_csum = vlan_ethtool_get_rx_csum, | |
729 | }; | |
730 | ||
ef3eb3e5 PM |
731 | void vlan_setup(struct net_device *dev) |
732 | { | |
733 | ether_setup(dev); | |
734 | ||
735 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
736 | dev->tx_queue_len = 0; | |
737 | ||
738 | dev->change_mtu = vlan_dev_change_mtu; | |
739 | dev->init = vlan_dev_init; | |
23556323 | 740 | dev->uninit = vlan_dev_uninit; |
ef3eb3e5 PM |
741 | dev->open = vlan_dev_open; |
742 | dev->stop = vlan_dev_stop; | |
743 | dev->set_mac_address = vlan_dev_set_mac_address; | |
e83a2ea8 CL |
744 | dev->set_rx_mode = vlan_dev_set_rx_mode; |
745 | dev->set_multicast_list = vlan_dev_set_rx_mode; | |
ef3eb3e5 PM |
746 | dev->change_rx_flags = vlan_dev_change_rx_flags; |
747 | dev->do_ioctl = vlan_dev_ioctl; | |
748 | dev->destructor = free_netdev; | |
75b8846a | 749 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
750 | |
751 | memset(dev->broadcast, 0, ETH_ALEN); | |
752 | } |