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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 | ||
6fef4c0c SH |
291 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
292 | struct net_device *dev) | |
1da177e4 | 293 | { |
450c4ea1 | 294 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
1da177e4 | 295 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
55b01e86 | 296 | |
1da177e4 LT |
297 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
298 | * | |
299 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
300 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
301 | */ | |
6ab3b487 | 302 | if (veth->h_vlan_proto != htons(ETH_P_8021Q) || |
d80aa31b PM |
303 | vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { |
304 | unsigned int orig_headroom = skb_headroom(skb); | |
9bb8582e | 305 | u16 vlan_tci; |
1da177e4 | 306 | |
9dfebcc6 | 307 | vlan_dev_info(dev)->cnt_encap_on_xmit++; |
1da177e4 | 308 | |
9bb8582e PM |
309 | vlan_tci = vlan_dev_info(dev)->vlan_id; |
310 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); | |
9bb8582e | 311 | skb = __vlan_put_tag(skb, vlan_tci); |
1da177e4 | 312 | if (!skb) { |
450c4ea1 | 313 | txq->tx_dropped++; |
d80aa31b | 314 | return NETDEV_TX_OK; |
1da177e4 LT |
315 | } |
316 | ||
2029cc2c | 317 | if (orig_headroom < VLAN_HLEN) |
9dfebcc6 | 318 | vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; |
1da177e4 LT |
319 | } |
320 | ||
450c4ea1 ED |
321 | txq->tx_packets++; |
322 | txq->tx_bytes += skb->len; | |
1da177e4 | 323 | |
9dfebcc6 | 324 | skb->dev = vlan_dev_info(dev)->real_dev; |
1da177e4 | 325 | dev_queue_xmit(skb); |
d80aa31b | 326 | return NETDEV_TX_OK; |
1da177e4 LT |
327 | } |
328 | ||
6fef4c0c SH |
329 | static netdev_tx_t vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, |
330 | struct net_device *dev) | |
1da177e4 | 331 | { |
450c4ea1 | 332 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
9bb8582e | 333 | u16 vlan_tci; |
1da177e4 | 334 | |
9bb8582e PM |
335 | vlan_tci = vlan_dev_info(dev)->vlan_id; |
336 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); | |
337 | skb = __vlan_hwaccel_put_tag(skb, vlan_tci); | |
1da177e4 | 338 | |
450c4ea1 ED |
339 | txq->tx_packets++; |
340 | txq->tx_bytes += skb->len; | |
1da177e4 | 341 | |
9dfebcc6 | 342 | skb->dev = vlan_dev_info(dev)->real_dev; |
1da177e4 | 343 | dev_queue_xmit(skb); |
d80aa31b | 344 | return NETDEV_TX_OK; |
1da177e4 LT |
345 | } |
346 | ||
ef3eb3e5 | 347 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
348 | { |
349 | /* TODO: gotta make sure the underlying layer can handle it, | |
350 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
351 | */ | |
9dfebcc6 | 352 | if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
353 | return -ERANGE; |
354 | ||
355 | dev->mtu = new_mtu; | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
c17d8874 | 360 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 361 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 362 | { |
9dfebcc6 | 363 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
b020cb48 PM |
364 | |
365 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
366 | vlan->nr_ingress_mappings--; | |
367 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
368 | vlan->nr_ingress_mappings++; | |
369 | ||
370 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
371 | } |
372 | ||
c17d8874 | 373 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 374 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 375 | { |
9dfebcc6 | 376 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
1da177e4 LT |
377 | struct vlan_priority_tci_mapping *mp = NULL; |
378 | struct vlan_priority_tci_mapping *np; | |
b020cb48 | 379 | u32 vlan_qos = (vlan_prio << 13) & 0xE000; |
122952fc | 380 | |
c17d8874 | 381 | /* See if a priority mapping exists.. */ |
b020cb48 | 382 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
383 | while (mp) { |
384 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
385 | if (mp->vlan_qos && !vlan_qos) |
386 | vlan->nr_egress_mappings--; | |
387 | else if (!mp->vlan_qos && vlan_qos) | |
388 | vlan->nr_egress_mappings++; | |
389 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 390 | return 0; |
1da177e4 | 391 | } |
c17d8874 | 392 | mp = mp->next; |
1da177e4 | 393 | } |
c17d8874 PM |
394 | |
395 | /* Create a new mapping then. */ | |
b020cb48 | 396 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
397 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
398 | if (!np) | |
399 | return -ENOBUFS; | |
400 | ||
401 | np->next = mp; | |
402 | np->priority = skb_prio; | |
b020cb48 PM |
403 | np->vlan_qos = vlan_qos; |
404 | vlan->egress_priority_map[skb_prio & 0xF] = np; | |
405 | if (vlan_qos) | |
406 | vlan->nr_egress_mappings++; | |
c17d8874 | 407 | return 0; |
1da177e4 LT |
408 | } |
409 | ||
a4bf3af4 | 410 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 411 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 412 | { |
b3ce0325 PM |
413 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
414 | u32 old_flags = vlan->flags; | |
415 | ||
70c03b49 | 416 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP)) |
b3ce0325 PM |
417 | return -EINVAL; |
418 | ||
419 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
420 | |
421 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
422 | if (vlan->flags & VLAN_FLAG_GVRP) | |
423 | vlan_gvrp_request_join(dev); | |
424 | else | |
425 | vlan_gvrp_request_leave(dev); | |
426 | } | |
b3ce0325 | 427 | return 0; |
1da177e4 LT |
428 | } |
429 | ||
c17d8874 | 430 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 431 | { |
9dfebcc6 | 432 | strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); |
1da177e4 LT |
433 | } |
434 | ||
ef3eb3e5 | 435 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 436 | { |
9dfebcc6 | 437 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
8c979c26 PM |
438 | struct net_device *real_dev = vlan->real_dev; |
439 | int err; | |
440 | ||
441 | if (!(real_dev->flags & IFF_UP)) | |
1da177e4 LT |
442 | return -ENETDOWN; |
443 | ||
8c979c26 | 444 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { |
ccffad25 | 445 | err = dev_unicast_add(real_dev, dev->dev_addr); |
8c979c26 | 446 | if (err < 0) |
89146504 | 447 | goto out; |
8c979c26 | 448 | } |
8c979c26 | 449 | |
89146504 WC |
450 | if (dev->flags & IFF_ALLMULTI) { |
451 | err = dev_set_allmulti(real_dev, 1); | |
452 | if (err < 0) | |
453 | goto del_unicast; | |
454 | } | |
455 | if (dev->flags & IFF_PROMISC) { | |
456 | err = dev_set_promiscuity(real_dev, 1); | |
457 | if (err < 0) | |
458 | goto clear_allmulti; | |
459 | } | |
460 | ||
461 | memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); | |
6c78dcbd | 462 | |
70c03b49 PM |
463 | if (vlan->flags & VLAN_FLAG_GVRP) |
464 | vlan_gvrp_request_join(dev); | |
465 | ||
adc667e8 | 466 | netif_carrier_on(dev); |
1da177e4 | 467 | return 0; |
89146504 WC |
468 | |
469 | clear_allmulti: | |
470 | if (dev->flags & IFF_ALLMULTI) | |
471 | dev_set_allmulti(real_dev, -1); | |
472 | del_unicast: | |
473 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) | |
ccffad25 | 474 | dev_unicast_delete(real_dev, dev->dev_addr); |
89146504 | 475 | out: |
adc667e8 | 476 | netif_carrier_off(dev); |
89146504 | 477 | return err; |
1da177e4 LT |
478 | } |
479 | ||
ef3eb3e5 | 480 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 481 | { |
70c03b49 PM |
482 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
483 | struct net_device *real_dev = vlan->real_dev; | |
484 | ||
485 | if (vlan->flags & VLAN_FLAG_GVRP) | |
486 | vlan_gvrp_request_leave(dev); | |
8c979c26 | 487 | |
56addd6e | 488 | dev_mc_unsync(real_dev, dev); |
e83a2ea8 | 489 | dev_unicast_unsync(real_dev, dev); |
6c78dcbd PM |
490 | if (dev->flags & IFF_ALLMULTI) |
491 | dev_set_allmulti(real_dev, -1); | |
492 | if (dev->flags & IFF_PROMISC) | |
493 | dev_set_promiscuity(real_dev, -1); | |
494 | ||
8c979c26 | 495 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) |
ccffad25 | 496 | dev_unicast_delete(real_dev, dev->dev_addr); |
8c979c26 | 497 | |
adc667e8 | 498 | netif_carrier_off(dev); |
1da177e4 LT |
499 | return 0; |
500 | } | |
501 | ||
ef3eb3e5 | 502 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 503 | { |
9dfebcc6 | 504 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
39aaac11 PM |
505 | struct sockaddr *addr = p; |
506 | int err; | |
507 | ||
508 | if (!is_valid_ether_addr(addr->sa_data)) | |
509 | return -EADDRNOTAVAIL; | |
510 | ||
511 | if (!(dev->flags & IFF_UP)) | |
512 | goto out; | |
513 | ||
514 | if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { | |
ccffad25 | 515 | err = dev_unicast_add(real_dev, addr->sa_data); |
39aaac11 PM |
516 | if (err < 0) |
517 | return err; | |
518 | } | |
519 | ||
520 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) | |
ccffad25 | 521 | dev_unicast_delete(real_dev, dev->dev_addr); |
39aaac11 PM |
522 | |
523 | out: | |
524 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
525 | return 0; | |
526 | } | |
527 | ||
ef3eb3e5 | 528 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 529 | { |
9dfebcc6 | 530 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
656299f7 | 531 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
532 | struct ifreq ifrr; |
533 | int err = -EOPNOTSUPP; | |
534 | ||
535 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
536 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
537 | ||
2029cc2c | 538 | switch (cmd) { |
1da177e4 LT |
539 | case SIOCGMIIPHY: |
540 | case SIOCGMIIREG: | |
541 | case SIOCSMIIREG: | |
656299f7 SH |
542 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
543 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 544 | break; |
1da177e4 LT |
545 | } |
546 | ||
122952fc | 547 | if (!err) |
1da177e4 LT |
548 | ifr->ifr_ifru = ifrr.ifr_ifru; |
549 | ||
550 | return err; | |
551 | } | |
552 | ||
cc883d16 FB |
553 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
554 | { | |
555 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
556 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
557 | int err = 0; | |
558 | ||
559 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 560 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
561 | |
562 | return err; | |
563 | } | |
564 | ||
b85daa53 VD |
565 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
566 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, | |
567 | struct scatterlist *sgl, unsigned int sgc) | |
568 | { | |
569 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
570 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
571 | int rc = 0; | |
572 | ||
573 | if (ops->ndo_fcoe_ddp_setup) | |
574 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
575 | ||
576 | return rc; | |
577 | } | |
578 | ||
579 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
580 | { | |
581 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
582 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
583 | int len = 0; | |
584 | ||
585 | if (ops->ndo_fcoe_ddp_done) | |
586 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
587 | ||
588 | return len; | |
589 | } | |
590 | #endif | |
591 | ||
ef3eb3e5 | 592 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 593 | { |
9dfebcc6 | 594 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
6c78dcbd PM |
595 | |
596 | if (change & IFF_ALLMULTI) | |
597 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
598 | if (change & IFF_PROMISC) | |
599 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
600 | } | |
601 | ||
e83a2ea8 | 602 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 603 | { |
9dfebcc6 | 604 | dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
e83a2ea8 | 605 | dev_unicast_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
1da177e4 | 606 | } |
ef3eb3e5 PM |
607 | |
608 | /* | |
609 | * vlan network devices have devices nesting below it, and are a special | |
610 | * "super class" of normal network devices; split their locks off into a | |
611 | * separate class since they always nest. | |
612 | */ | |
613 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 614 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 615 | |
e8a0464c DM |
616 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
617 | struct netdev_queue *txq, | |
618 | void *_subclass) | |
c773e847 DM |
619 | { |
620 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
621 | &vlan_netdev_xmit_lock_key, |
622 | *(int *)_subclass); | |
c773e847 DM |
623 | } |
624 | ||
625 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
626 | { | |
cf508b12 DM |
627 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
628 | &vlan_netdev_addr_lock_key, | |
629 | subclass); | |
e8a0464c | 630 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
631 | } |
632 | ||
ef3eb3e5 PM |
633 | static const struct header_ops vlan_header_ops = { |
634 | .create = vlan_dev_hard_header, | |
635 | .rebuild = vlan_dev_rebuild_header, | |
636 | .parse = eth_header_parse, | |
637 | }; | |
638 | ||
f7d1b9f5 ED |
639 | static const struct net_device_ops vlan_netdev_ops, vlan_netdev_accel_ops; |
640 | ||
ef3eb3e5 PM |
641 | static int vlan_dev_init(struct net_device *dev) |
642 | { | |
9dfebcc6 | 643 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
ef3eb3e5 PM |
644 | int subclass = 0; |
645 | ||
adc667e8 JV |
646 | netif_carrier_off(dev); |
647 | ||
ef3eb3e5 | 648 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
0ed21b32 | 649 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI); |
ef3eb3e5 PM |
650 | dev->iflink = real_dev->ifindex; |
651 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
652 | (1<<__LINK_STATE_DORMANT))) | | |
653 | (1<<__LINK_STATE_PRESENT); | |
654 | ||
289c79a4 | 655 | dev->features |= real_dev->features & real_dev->vlan_features; |
1ae4be22 | 656 | dev->gso_max_size = real_dev->gso_max_size; |
5fb13570 | 657 | |
ef3eb3e5 PM |
658 | /* ipv6 shared card related stuff */ |
659 | dev->dev_id = real_dev->dev_id; | |
660 | ||
661 | if (is_zero_ether_addr(dev->dev_addr)) | |
662 | memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); | |
663 | if (is_zero_ether_addr(dev->broadcast)) | |
664 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
665 | ||
b85daa53 VD |
666 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
667 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; | |
668 | #endif | |
669 | ||
ef3eb3e5 PM |
670 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { |
671 | dev->header_ops = real_dev->header_ops; | |
672 | dev->hard_header_len = real_dev->hard_header_len; | |
f7d1b9f5 | 673 | dev->netdev_ops = &vlan_netdev_accel_ops; |
ef3eb3e5 PM |
674 | } else { |
675 | dev->header_ops = &vlan_header_ops; | |
676 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
f7d1b9f5 | 677 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 PM |
678 | } |
679 | ||
26a25239 | 680 | if (is_vlan_dev(real_dev)) |
ef3eb3e5 PM |
681 | subclass = 1; |
682 | ||
c773e847 | 683 | vlan_dev_set_lockdep_class(dev, subclass); |
ef3eb3e5 PM |
684 | return 0; |
685 | } | |
686 | ||
23556323 PE |
687 | static void vlan_dev_uninit(struct net_device *dev) |
688 | { | |
689 | struct vlan_priority_tci_mapping *pm; | |
690 | struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
691 | int i; | |
692 | ||
693 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { | |
694 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
695 | vlan->egress_priority_map[i] = pm->next; | |
696 | kfree(pm); | |
697 | } | |
698 | } | |
699 | } | |
700 | ||
b3020061 SH |
701 | static int vlan_ethtool_get_settings(struct net_device *dev, |
702 | struct ethtool_cmd *cmd) | |
703 | { | |
704 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
b1b67dd4 | 705 | return dev_ethtool_get_settings(vlan->real_dev, cmd); |
b3020061 SH |
706 | } |
707 | ||
708 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
709 | struct ethtool_drvinfo *info) | |
710 | { | |
711 | strcpy(info->driver, vlan_fullname); | |
712 | strcpy(info->version, vlan_version); | |
713 | strcpy(info->fw_version, "N/A"); | |
714 | } | |
715 | ||
75b8846a PM |
716 | static u32 vlan_ethtool_get_rx_csum(struct net_device *dev) |
717 | { | |
718 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
b1b67dd4 | 719 | return dev_ethtool_get_rx_csum(vlan->real_dev); |
75b8846a PM |
720 | } |
721 | ||
19b9a4e2 PM |
722 | static u32 vlan_ethtool_get_flags(struct net_device *dev) |
723 | { | |
724 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
b1b67dd4 | 725 | return dev_ethtool_get_flags(vlan->real_dev); |
19b9a4e2 PM |
726 | } |
727 | ||
75b8846a | 728 | static const struct ethtool_ops vlan_ethtool_ops = { |
b3020061 SH |
729 | .get_settings = vlan_ethtool_get_settings, |
730 | .get_drvinfo = vlan_ethtool_get_drvinfo, | |
75b8846a PM |
731 | .get_link = ethtool_op_get_link, |
732 | .get_rx_csum = vlan_ethtool_get_rx_csum, | |
19b9a4e2 | 733 | .get_flags = vlan_ethtool_get_flags, |
75b8846a PM |
734 | }; |
735 | ||
656299f7 SH |
736 | static const struct net_device_ops vlan_netdev_ops = { |
737 | .ndo_change_mtu = vlan_dev_change_mtu, | |
738 | .ndo_init = vlan_dev_init, | |
739 | .ndo_uninit = vlan_dev_uninit, | |
740 | .ndo_open = vlan_dev_open, | |
741 | .ndo_stop = vlan_dev_stop, | |
f7d1b9f5 ED |
742 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
743 | .ndo_validate_addr = eth_validate_addr, | |
744 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
745 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
746 | .ndo_set_multicast_list = vlan_dev_set_rx_mode, | |
747 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, | |
748 | .ndo_do_ioctl = vlan_dev_ioctl, | |
cc883d16 | 749 | .ndo_neigh_setup = vlan_dev_neigh_setup, |
b85daa53 VD |
750 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
751 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, | |
752 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
753 | #endif | |
f7d1b9f5 ED |
754 | }; |
755 | ||
756 | static const struct net_device_ops vlan_netdev_accel_ops = { | |
757 | .ndo_change_mtu = vlan_dev_change_mtu, | |
758 | .ndo_init = vlan_dev_init, | |
759 | .ndo_uninit = vlan_dev_uninit, | |
760 | .ndo_open = vlan_dev_open, | |
761 | .ndo_stop = vlan_dev_stop, | |
762 | .ndo_start_xmit = vlan_dev_hwaccel_hard_start_xmit, | |
656299f7 SH |
763 | .ndo_validate_addr = eth_validate_addr, |
764 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
765 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
766 | .ndo_set_multicast_list = vlan_dev_set_rx_mode, | |
767 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, | |
768 | .ndo_do_ioctl = vlan_dev_ioctl, | |
cc883d16 | 769 | .ndo_neigh_setup = vlan_dev_neigh_setup, |
b85daa53 VD |
770 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
771 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, | |
772 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
773 | #endif | |
656299f7 SH |
774 | }; |
775 | ||
ef3eb3e5 PM |
776 | void vlan_setup(struct net_device *dev) |
777 | { | |
778 | ether_setup(dev); | |
779 | ||
780 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
93f154b5 | 781 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
ef3eb3e5 PM |
782 | dev->tx_queue_len = 0; |
783 | ||
656299f7 | 784 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 | 785 | dev->destructor = free_netdev; |
75b8846a | 786 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
787 | |
788 | memset(dev->broadcast, 0, ETH_ALEN); | |
789 | } |