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> | |
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; |
9793241f | 143 | struct vlan_rx_stats *rx_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 | ||
2dc85e91 | 166 | rx_stats = per_cpu_ptr(vlan_dev_info(skb->dev)->vlan_rx_stats, |
9793241f ED |
167 | smp_processor_id()); |
168 | rx_stats->rx_packets++; | |
169 | rx_stats->rx_bytes += skb->len; | |
1da177e4 | 170 | |
cbb042f9 | 171 | skb_pull_rcsum(skb, VLAN_HLEN); |
a388442c | 172 | |
9bb8582e | 173 | skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci); |
1da177e4 | 174 | |
40f98e1a | 175 | pr_debug("%s: priority: %u for TCI: %hu\n", |
9bb8582e | 176 | __func__, skb->priority, vlan_tci); |
1da177e4 | 177 | |
1da177e4 LT |
178 | switch (skb->pkt_type) { |
179 | case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ | |
2029cc2c | 180 | /* stats->broadcast ++; // no such counter :-( */ |
1da177e4 LT |
181 | break; |
182 | ||
183 | case PACKET_MULTICAST: | |
9793241f | 184 | rx_stats->multicast++; |
1da177e4 LT |
185 | break; |
186 | ||
122952fc | 187 | case PACKET_OTHERHOST: |
1da177e4 | 188 | /* Our lower layer thinks this is not local, let's make sure. |
2029cc2c PM |
189 | * This allows the VLAN to have a different MAC than the |
190 | * underlying device, and still route correctly. | |
1da177e4 | 191 | */ |
2029cc2c PM |
192 | if (!compare_ether_addr(eth_hdr(skb)->h_dest, |
193 | skb->dev->dev_addr)) | |
1da177e4 | 194 | skb->pkt_type = PACKET_HOST; |
1da177e4 LT |
195 | break; |
196 | default: | |
197 | break; | |
3ff50b79 | 198 | } |
1da177e4 | 199 | |
91b4f954 | 200 | vlan_set_encap_proto(skb, vhdr); |
1da177e4 | 201 | |
1da177e4 | 202 | skb = vlan_check_reorder_header(skb); |
31ffdbcb | 203 | if (!skb) { |
9793241f | 204 | rx_stats->rx_errors++; |
31ffdbcb | 205 | goto err_unlock; |
1da177e4 | 206 | } |
31ffdbcb PM |
207 | |
208 | netif_rx(skb); | |
1da177e4 | 209 | rcu_read_unlock(); |
31ffdbcb PM |
210 | return NET_RX_SUCCESS; |
211 | ||
212 | err_unlock: | |
213 | rcu_read_unlock(); | |
214 | err_free: | |
215 | kfree_skb(skb); | |
216 | return NET_RX_DROP; | |
1da177e4 LT |
217 | } |
218 | ||
9bb8582e | 219 | static inline u16 |
2029cc2c | 220 | vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) |
1da177e4 | 221 | { |
2029cc2c | 222 | struct vlan_priority_tci_mapping *mp; |
1da177e4 | 223 | |
2029cc2c | 224 | mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; |
1da177e4 LT |
225 | while (mp) { |
226 | if (mp->priority == skb->priority) { | |
2029cc2c PM |
227 | return mp->vlan_qos; /* This should already be shifted |
228 | * to mask correctly with the | |
229 | * VLAN's TCI */ | |
1da177e4 LT |
230 | } |
231 | mp = mp->next; | |
232 | } | |
233 | return 0; | |
234 | } | |
235 | ||
236 | /* | |
122952fc | 237 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
238 | * |
239 | * saddr=NULL means use device source address | |
240 | * daddr=NULL means leave destination address (eg unresolved arp) | |
241 | * | |
242 | * This is called when the SKB is moving down the stack towards the | |
243 | * physical devices. | |
244 | */ | |
ef3eb3e5 PM |
245 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
246 | unsigned short type, | |
247 | const void *daddr, const void *saddr, | |
248 | unsigned int len) | |
1da177e4 LT |
249 | { |
250 | struct vlan_hdr *vhdr; | |
1349fe9a | 251 | unsigned int vhdrlen = 0; |
9bb8582e | 252 | u16 vlan_tci = 0; |
1349fe9a | 253 | int rc; |
1da177e4 | 254 | |
11a100f8 PM |
255 | if (WARN_ON(skb_headroom(skb) < dev->hard_header_len)) |
256 | return -ENOSPC; | |
257 | ||
1349fe9a | 258 | if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) { |
1da177e4 LT |
259 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
260 | ||
9bb8582e PM |
261 | vlan_tci = vlan_dev_info(dev)->vlan_id; |
262 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); | |
9bb8582e | 263 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
264 | |
265 | /* | |
bf9ae538 OP |
266 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
267 | * put the length in here instead. | |
1da177e4 | 268 | */ |
bf9ae538 | 269 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
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 | { |
2f8bc32b ED |
294 | int i = skb_get_queue_mapping(skb); |
295 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1da177e4 | 296 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
1a123a31 ED |
297 | unsigned int len; |
298 | int ret; | |
55b01e86 | 299 | |
1da177e4 LT |
300 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
301 | * | |
302 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
303 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
304 | */ | |
6ab3b487 | 305 | if (veth->h_vlan_proto != htons(ETH_P_8021Q) || |
d80aa31b PM |
306 | vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { |
307 | unsigned int orig_headroom = skb_headroom(skb); | |
9bb8582e | 308 | u16 vlan_tci; |
1da177e4 | 309 | |
9dfebcc6 | 310 | vlan_dev_info(dev)->cnt_encap_on_xmit++; |
1da177e4 | 311 | |
9bb8582e PM |
312 | vlan_tci = vlan_dev_info(dev)->vlan_id; |
313 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); | |
9bb8582e | 314 | skb = __vlan_put_tag(skb, vlan_tci); |
1da177e4 | 315 | if (!skb) { |
450c4ea1 | 316 | txq->tx_dropped++; |
d80aa31b | 317 | return NETDEV_TX_OK; |
1da177e4 LT |
318 | } |
319 | ||
2029cc2c | 320 | if (orig_headroom < VLAN_HLEN) |
9dfebcc6 | 321 | vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; |
1da177e4 LT |
322 | } |
323 | ||
1da177e4 | 324 | |
8a83a00b | 325 | skb_set_dev(skb, vlan_dev_info(dev)->real_dev); |
1a123a31 ED |
326 | len = skb->len; |
327 | ret = dev_queue_xmit(skb); | |
328 | ||
329 | if (likely(ret == NET_XMIT_SUCCESS)) { | |
330 | txq->tx_packets++; | |
331 | txq->tx_bytes += len; | |
332 | } else | |
333 | txq->tx_dropped++; | |
334 | ||
cbbef5e1 | 335 | return ret; |
1da177e4 LT |
336 | } |
337 | ||
6fef4c0c SH |
338 | static netdev_tx_t vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, |
339 | struct net_device *dev) | |
1da177e4 | 340 | { |
2f8bc32b ED |
341 | int i = skb_get_queue_mapping(skb); |
342 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
9bb8582e | 343 | u16 vlan_tci; |
1a123a31 ED |
344 | unsigned int len; |
345 | int ret; | |
1da177e4 | 346 | |
9bb8582e PM |
347 | vlan_tci = vlan_dev_info(dev)->vlan_id; |
348 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); | |
349 | skb = __vlan_hwaccel_put_tag(skb, vlan_tci); | |
1da177e4 | 350 | |
9dfebcc6 | 351 | skb->dev = vlan_dev_info(dev)->real_dev; |
1a123a31 ED |
352 | len = skb->len; |
353 | ret = dev_queue_xmit(skb); | |
354 | ||
355 | if (likely(ret == NET_XMIT_SUCCESS)) { | |
356 | txq->tx_packets++; | |
357 | txq->tx_bytes += len; | |
358 | } else | |
359 | txq->tx_dropped++; | |
360 | ||
cbbef5e1 | 361 | return ret; |
1da177e4 LT |
362 | } |
363 | ||
ef3eb3e5 | 364 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
365 | { |
366 | /* TODO: gotta make sure the underlying layer can handle it, | |
367 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
368 | */ | |
9dfebcc6 | 369 | if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
370 | return -ERANGE; |
371 | ||
372 | dev->mtu = new_mtu; | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
c17d8874 | 377 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 378 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 379 | { |
9dfebcc6 | 380 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
b020cb48 PM |
381 | |
382 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
383 | vlan->nr_ingress_mappings--; | |
384 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
385 | vlan->nr_ingress_mappings++; | |
386 | ||
387 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
388 | } |
389 | ||
c17d8874 | 390 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 391 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 392 | { |
9dfebcc6 | 393 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
1da177e4 LT |
394 | struct vlan_priority_tci_mapping *mp = NULL; |
395 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 396 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 397 | |
c17d8874 | 398 | /* See if a priority mapping exists.. */ |
b020cb48 | 399 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
400 | while (mp) { |
401 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
402 | if (mp->vlan_qos && !vlan_qos) |
403 | vlan->nr_egress_mappings--; | |
404 | else if (!mp->vlan_qos && vlan_qos) | |
405 | vlan->nr_egress_mappings++; | |
406 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 407 | return 0; |
1da177e4 | 408 | } |
c17d8874 | 409 | mp = mp->next; |
1da177e4 | 410 | } |
c17d8874 PM |
411 | |
412 | /* Create a new mapping then. */ | |
b020cb48 | 413 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
414 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
415 | if (!np) | |
416 | return -ENOBUFS; | |
417 | ||
418 | np->next = mp; | |
419 | np->priority = skb_prio; | |
b020cb48 PM |
420 | np->vlan_qos = vlan_qos; |
421 | vlan->egress_priority_map[skb_prio & 0xF] = np; | |
422 | if (vlan_qos) | |
423 | vlan->nr_egress_mappings++; | |
c17d8874 | 424 | return 0; |
1da177e4 LT |
425 | } |
426 | ||
a4bf3af4 | 427 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 428 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 429 | { |
b3ce0325 PM |
430 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
431 | u32 old_flags = vlan->flags; | |
432 | ||
5e756593 PM |
433 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
434 | VLAN_FLAG_LOOSE_BINDING)) | |
b3ce0325 PM |
435 | return -EINVAL; |
436 | ||
437 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
438 | |
439 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
440 | if (vlan->flags & VLAN_FLAG_GVRP) | |
441 | vlan_gvrp_request_join(dev); | |
442 | else | |
443 | vlan_gvrp_request_leave(dev); | |
444 | } | |
b3ce0325 | 445 | return 0; |
1da177e4 LT |
446 | } |
447 | ||
c17d8874 | 448 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 449 | { |
9dfebcc6 | 450 | strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); |
1da177e4 LT |
451 | } |
452 | ||
ef3eb3e5 | 453 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 454 | { |
9dfebcc6 | 455 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
8c979c26 PM |
456 | struct net_device *real_dev = vlan->real_dev; |
457 | int err; | |
458 | ||
5e756593 PM |
459 | if (!(real_dev->flags & IFF_UP) && |
460 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
461 | return -ENETDOWN; |
462 | ||
8c979c26 | 463 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { |
a748ee24 | 464 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 465 | if (err < 0) |
89146504 | 466 | goto out; |
8c979c26 | 467 | } |
8c979c26 | 468 | |
89146504 WC |
469 | if (dev->flags & IFF_ALLMULTI) { |
470 | err = dev_set_allmulti(real_dev, 1); | |
471 | if (err < 0) | |
472 | goto del_unicast; | |
473 | } | |
474 | if (dev->flags & IFF_PROMISC) { | |
475 | err = dev_set_promiscuity(real_dev, 1); | |
476 | if (err < 0) | |
477 | goto clear_allmulti; | |
478 | } | |
479 | ||
480 | memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); | |
6c78dcbd | 481 | |
70c03b49 PM |
482 | if (vlan->flags & VLAN_FLAG_GVRP) |
483 | vlan_gvrp_request_join(dev); | |
484 | ||
adc667e8 | 485 | netif_carrier_on(dev); |
1da177e4 | 486 | return 0; |
89146504 WC |
487 | |
488 | clear_allmulti: | |
489 | if (dev->flags & IFF_ALLMULTI) | |
490 | dev_set_allmulti(real_dev, -1); | |
491 | del_unicast: | |
492 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) | |
a748ee24 | 493 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 494 | out: |
adc667e8 | 495 | netif_carrier_off(dev); |
89146504 | 496 | return err; |
1da177e4 LT |
497 | } |
498 | ||
ef3eb3e5 | 499 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 500 | { |
70c03b49 PM |
501 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
502 | struct net_device *real_dev = vlan->real_dev; | |
503 | ||
504 | if (vlan->flags & VLAN_FLAG_GVRP) | |
505 | vlan_gvrp_request_leave(dev); | |
8c979c26 | 506 | |
56addd6e | 507 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 508 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
509 | if (dev->flags & IFF_ALLMULTI) |
510 | dev_set_allmulti(real_dev, -1); | |
511 | if (dev->flags & IFF_PROMISC) | |
512 | dev_set_promiscuity(real_dev, -1); | |
513 | ||
8c979c26 | 514 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 515 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 516 | |
adc667e8 | 517 | netif_carrier_off(dev); |
1da177e4 LT |
518 | return 0; |
519 | } | |
520 | ||
ef3eb3e5 | 521 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 522 | { |
9dfebcc6 | 523 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
39aaac11 PM |
524 | struct sockaddr *addr = p; |
525 | int err; | |
526 | ||
527 | if (!is_valid_ether_addr(addr->sa_data)) | |
528 | return -EADDRNOTAVAIL; | |
529 | ||
530 | if (!(dev->flags & IFF_UP)) | |
531 | goto out; | |
532 | ||
533 | if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { | |
a748ee24 | 534 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
535 | if (err < 0) |
536 | return err; | |
537 | } | |
538 | ||
539 | if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) | |
a748ee24 | 540 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
541 | |
542 | out: | |
543 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
544 | return 0; | |
545 | } | |
546 | ||
ef3eb3e5 | 547 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 548 | { |
9dfebcc6 | 549 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
656299f7 | 550 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
551 | struct ifreq ifrr; |
552 | int err = -EOPNOTSUPP; | |
553 | ||
554 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
555 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
556 | ||
2029cc2c | 557 | switch (cmd) { |
1da177e4 LT |
558 | case SIOCGMIIPHY: |
559 | case SIOCGMIIREG: | |
560 | case SIOCSMIIREG: | |
656299f7 SH |
561 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
562 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 563 | break; |
1da177e4 LT |
564 | } |
565 | ||
122952fc | 566 | if (!err) |
1da177e4 LT |
567 | ifr->ifr_ifru = ifrr.ifr_ifru; |
568 | ||
569 | return err; | |
570 | } | |
571 | ||
cc883d16 FB |
572 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
573 | { | |
574 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
575 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
576 | int err = 0; | |
577 | ||
578 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 579 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
580 | |
581 | return err; | |
582 | } | |
583 | ||
b85daa53 VD |
584 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
585 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, | |
586 | struct scatterlist *sgl, unsigned int sgc) | |
587 | { | |
588 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
589 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
590 | int rc = 0; | |
591 | ||
592 | if (ops->ndo_fcoe_ddp_setup) | |
593 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
594 | ||
595 | return rc; | |
596 | } | |
597 | ||
598 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
599 | { | |
600 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
601 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
602 | int len = 0; | |
603 | ||
604 | if (ops->ndo_fcoe_ddp_done) | |
605 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
606 | ||
607 | return len; | |
608 | } | |
0af46d99 YZ |
609 | |
610 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
611 | { | |
612 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
613 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
614 | int rc = -EINVAL; | |
615 | ||
616 | if (ops->ndo_fcoe_enable) | |
617 | rc = ops->ndo_fcoe_enable(real_dev); | |
618 | return rc; | |
619 | } | |
620 | ||
621 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
622 | { | |
623 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
624 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
625 | int rc = -EINVAL; | |
626 | ||
627 | if (ops->ndo_fcoe_disable) | |
628 | rc = ops->ndo_fcoe_disable(real_dev); | |
629 | return rc; | |
630 | } | |
d6534799 YZ |
631 | |
632 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
633 | { | |
634 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; | |
635 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
636 | int rc = -EINVAL; | |
637 | ||
638 | if (ops->ndo_fcoe_get_wwn) | |
639 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); | |
640 | return rc; | |
641 | } | |
b85daa53 VD |
642 | #endif |
643 | ||
ef3eb3e5 | 644 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 645 | { |
9dfebcc6 | 646 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
6c78dcbd PM |
647 | |
648 | if (change & IFF_ALLMULTI) | |
649 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
650 | if (change & IFF_PROMISC) | |
651 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
652 | } | |
653 | ||
e83a2ea8 | 654 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 655 | { |
9dfebcc6 | 656 | dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
a748ee24 | 657 | dev_uc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); |
1da177e4 | 658 | } |
ef3eb3e5 PM |
659 | |
660 | /* | |
661 | * vlan network devices have devices nesting below it, and are a special | |
662 | * "super class" of normal network devices; split their locks off into a | |
663 | * separate class since they always nest. | |
664 | */ | |
665 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 666 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 667 | |
e8a0464c DM |
668 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
669 | struct netdev_queue *txq, | |
670 | void *_subclass) | |
c773e847 DM |
671 | { |
672 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
673 | &vlan_netdev_xmit_lock_key, |
674 | *(int *)_subclass); | |
c773e847 DM |
675 | } |
676 | ||
677 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
678 | { | |
cf508b12 DM |
679 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
680 | &vlan_netdev_addr_lock_key, | |
681 | subclass); | |
e8a0464c | 682 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
683 | } |
684 | ||
ef3eb3e5 PM |
685 | static const struct header_ops vlan_header_ops = { |
686 | .create = vlan_dev_hard_header, | |
687 | .rebuild = vlan_dev_rebuild_header, | |
688 | .parse = eth_header_parse, | |
689 | }; | |
690 | ||
f7d1b9f5 ED |
691 | static const struct net_device_ops vlan_netdev_ops, vlan_netdev_accel_ops; |
692 | ||
ef3eb3e5 PM |
693 | static int vlan_dev_init(struct net_device *dev) |
694 | { | |
9dfebcc6 | 695 | struct net_device *real_dev = vlan_dev_info(dev)->real_dev; |
ef3eb3e5 PM |
696 | int subclass = 0; |
697 | ||
adc667e8 JV |
698 | netif_carrier_off(dev); |
699 | ||
ef3eb3e5 | 700 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
0ed21b32 | 701 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI); |
ef3eb3e5 PM |
702 | dev->iflink = real_dev->ifindex; |
703 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
704 | (1<<__LINK_STATE_DORMANT))) | | |
705 | (1<<__LINK_STATE_PRESENT); | |
706 | ||
289c79a4 | 707 | dev->features |= real_dev->features & real_dev->vlan_features; |
1ae4be22 | 708 | dev->gso_max_size = real_dev->gso_max_size; |
5fb13570 | 709 | |
ef3eb3e5 PM |
710 | /* ipv6 shared card related stuff */ |
711 | dev->dev_id = real_dev->dev_id; | |
712 | ||
713 | if (is_zero_ether_addr(dev->dev_addr)) | |
714 | memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); | |
715 | if (is_zero_ether_addr(dev->broadcast)) | |
716 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
717 | ||
b85daa53 VD |
718 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
719 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; | |
720 | #endif | |
721 | ||
ef3eb3e5 PM |
722 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { |
723 | dev->header_ops = real_dev->header_ops; | |
724 | dev->hard_header_len = real_dev->hard_header_len; | |
f7d1b9f5 | 725 | dev->netdev_ops = &vlan_netdev_accel_ops; |
ef3eb3e5 PM |
726 | } else { |
727 | dev->header_ops = &vlan_header_ops; | |
728 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
f7d1b9f5 | 729 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 PM |
730 | } |
731 | ||
26a25239 | 732 | if (is_vlan_dev(real_dev)) |
ef3eb3e5 PM |
733 | subclass = 1; |
734 | ||
c773e847 | 735 | vlan_dev_set_lockdep_class(dev, subclass); |
9793241f ED |
736 | |
737 | vlan_dev_info(dev)->vlan_rx_stats = alloc_percpu(struct vlan_rx_stats); | |
738 | if (!vlan_dev_info(dev)->vlan_rx_stats) | |
739 | return -ENOMEM; | |
740 | ||
ef3eb3e5 PM |
741 | return 0; |
742 | } | |
743 | ||
23556323 PE |
744 | static void vlan_dev_uninit(struct net_device *dev) |
745 | { | |
746 | struct vlan_priority_tci_mapping *pm; | |
747 | struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
748 | int i; | |
749 | ||
9793241f ED |
750 | free_percpu(vlan->vlan_rx_stats); |
751 | vlan->vlan_rx_stats = NULL; | |
23556323 PE |
752 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { |
753 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
754 | vlan->egress_priority_map[i] = pm->next; | |
755 | kfree(pm); | |
756 | } | |
757 | } | |
758 | } | |
759 | ||
b3020061 SH |
760 | static int vlan_ethtool_get_settings(struct net_device *dev, |
761 | struct ethtool_cmd *cmd) | |
762 | { | |
763 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
b1b67dd4 | 764 | return dev_ethtool_get_settings(vlan->real_dev, cmd); |
b3020061 SH |
765 | } |
766 | ||
767 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
768 | struct ethtool_drvinfo *info) | |
769 | { | |
770 | strcpy(info->driver, vlan_fullname); | |
771 | strcpy(info->version, vlan_version); | |
772 | strcpy(info->fw_version, "N/A"); | |
773 | } | |
774 | ||
75b8846a PM |
775 | static u32 vlan_ethtool_get_rx_csum(struct net_device *dev) |
776 | { | |
777 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
b1b67dd4 | 778 | return dev_ethtool_get_rx_csum(vlan->real_dev); |
75b8846a PM |
779 | } |
780 | ||
19b9a4e2 PM |
781 | static u32 vlan_ethtool_get_flags(struct net_device *dev) |
782 | { | |
783 | const struct vlan_dev_info *vlan = vlan_dev_info(dev); | |
b1b67dd4 | 784 | return dev_ethtool_get_flags(vlan->real_dev); |
19b9a4e2 PM |
785 | } |
786 | ||
9793241f ED |
787 | static struct net_device_stats *vlan_dev_get_stats(struct net_device *dev) |
788 | { | |
789 | struct net_device_stats *stats = &dev->stats; | |
790 | ||
791 | dev_txq_stats_fold(dev, stats); | |
792 | ||
793 | if (vlan_dev_info(dev)->vlan_rx_stats) { | |
794 | struct vlan_rx_stats *p, rx = {0}; | |
795 | int i; | |
796 | ||
797 | for_each_possible_cpu(i) { | |
798 | p = per_cpu_ptr(vlan_dev_info(dev)->vlan_rx_stats, i); | |
799 | rx.rx_packets += p->rx_packets; | |
800 | rx.rx_bytes += p->rx_bytes; | |
801 | rx.rx_errors += p->rx_errors; | |
802 | rx.multicast += p->multicast; | |
803 | } | |
804 | stats->rx_packets = rx.rx_packets; | |
805 | stats->rx_bytes = rx.rx_bytes; | |
806 | stats->rx_errors = rx.rx_errors; | |
807 | stats->multicast = rx.multicast; | |
808 | } | |
809 | return stats; | |
810 | } | |
811 | ||
75b8846a | 812 | static const struct ethtool_ops vlan_ethtool_ops = { |
b3020061 SH |
813 | .get_settings = vlan_ethtool_get_settings, |
814 | .get_drvinfo = vlan_ethtool_get_drvinfo, | |
75b8846a PM |
815 | .get_link = ethtool_op_get_link, |
816 | .get_rx_csum = vlan_ethtool_get_rx_csum, | |
19b9a4e2 | 817 | .get_flags = vlan_ethtool_get_flags, |
75b8846a PM |
818 | }; |
819 | ||
656299f7 SH |
820 | static const struct net_device_ops vlan_netdev_ops = { |
821 | .ndo_change_mtu = vlan_dev_change_mtu, | |
822 | .ndo_init = vlan_dev_init, | |
823 | .ndo_uninit = vlan_dev_uninit, | |
824 | .ndo_open = vlan_dev_open, | |
825 | .ndo_stop = vlan_dev_stop, | |
f7d1b9f5 ED |
826 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
827 | .ndo_validate_addr = eth_validate_addr, | |
828 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
829 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
830 | .ndo_set_multicast_list = vlan_dev_set_rx_mode, | |
831 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, | |
832 | .ndo_do_ioctl = vlan_dev_ioctl, | |
cc883d16 | 833 | .ndo_neigh_setup = vlan_dev_neigh_setup, |
9793241f | 834 | .ndo_get_stats = vlan_dev_get_stats, |
b85daa53 VD |
835 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
836 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, | |
837 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
0af46d99 YZ |
838 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, |
839 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
d6534799 | 840 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, |
b85daa53 | 841 | #endif |
f7d1b9f5 ED |
842 | }; |
843 | ||
844 | static const struct net_device_ops vlan_netdev_accel_ops = { | |
845 | .ndo_change_mtu = vlan_dev_change_mtu, | |
846 | .ndo_init = vlan_dev_init, | |
847 | .ndo_uninit = vlan_dev_uninit, | |
848 | .ndo_open = vlan_dev_open, | |
849 | .ndo_stop = vlan_dev_stop, | |
850 | .ndo_start_xmit = vlan_dev_hwaccel_hard_start_xmit, | |
656299f7 SH |
851 | .ndo_validate_addr = eth_validate_addr, |
852 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
853 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
854 | .ndo_set_multicast_list = vlan_dev_set_rx_mode, | |
855 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, | |
856 | .ndo_do_ioctl = vlan_dev_ioctl, | |
cc883d16 | 857 | .ndo_neigh_setup = vlan_dev_neigh_setup, |
9793241f | 858 | .ndo_get_stats = vlan_dev_get_stats, |
b85daa53 VD |
859 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
860 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, | |
861 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
0af46d99 YZ |
862 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, |
863 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
d6534799 | 864 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, |
b85daa53 | 865 | #endif |
656299f7 SH |
866 | }; |
867 | ||
ef3eb3e5 PM |
868 | void vlan_setup(struct net_device *dev) |
869 | { | |
870 | ether_setup(dev); | |
871 | ||
872 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
93f154b5 | 873 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
ef3eb3e5 PM |
874 | dev->tx_queue_len = 0; |
875 | ||
656299f7 | 876 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 | 877 | dev->destructor = free_netdev; |
75b8846a | 878 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
879 | |
880 | memset(dev->broadcast, 0, ETH_ALEN); | |
881 | } |