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1da177e4 LT |
1 | /* |
2 | * INET 802.1Q VLAN | |
3 | * Ethernet-type device handling. | |
4 | * | |
5 | * Authors: Ben Greear <greearb@candelatech.com> | |
6 | * Please send support related email to: vlan@scry.wanfear.com | |
7 | * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html | |
122952fc | 8 | * |
1da177e4 LT |
9 | * Fixes: |
10 | * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; | |
11 | * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; | |
12 | * Correct all the locking - David S. Miller <davem@redhat.com>; | |
13 | * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * as published by the Free Software Foundation; either version | |
18 | * 2 of the License, or (at your option) any later version. | |
19 | */ | |
20 | ||
21 | #include <asm/uaccess.h> /* for copy_from_user */ | |
4fc268d2 | 22 | #include <linux/capability.h> |
1da177e4 LT |
23 | #include <linux/module.h> |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/skbuff.h> | |
26 | #include <net/datalink.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/init.h> | |
30 | #include <net/p8022.h> | |
31 | #include <net/arp.h> | |
32 | #include <linux/rtnetlink.h> | |
33 | #include <linux/notifier.h> | |
34 | ||
35 | #include <linux/if_vlan.h> | |
36 | #include "vlan.h" | |
37 | #include "vlanproc.h" | |
38 | ||
39 | #define DRV_VERSION "1.8" | |
40 | ||
41 | /* Global VLAN variables */ | |
42 | ||
43 | /* Our listing of VLAN group(s) */ | |
44 | static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; | |
45 | #define vlan_grp_hashfn(IDX) ((((IDX) >> VLAN_GRP_HASH_SHIFT) ^ (IDX)) & VLAN_GRP_HASH_MASK) | |
46 | ||
47 | static char vlan_fullname[] = "802.1Q VLAN Support"; | |
48 | static char vlan_version[] = DRV_VERSION; | |
49 | static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
50 | static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
51 | ||
52 | static int vlan_device_event(struct notifier_block *, unsigned long, void *); | |
53 | static int vlan_ioctl_handler(void __user *); | |
54 | static int unregister_vlan_dev(struct net_device *, unsigned short ); | |
55 | ||
56 | static struct notifier_block vlan_notifier_block = { | |
57 | .notifier_call = vlan_device_event, | |
58 | }; | |
59 | ||
60 | /* These may be changed at run-time through IOCTLs */ | |
61 | ||
62 | /* Determines interface naming scheme. */ | |
63 | unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; | |
64 | ||
65 | static struct packet_type vlan_packet_type = { | |
66 | .type = __constant_htons(ETH_P_8021Q), | |
67 | .func = vlan_skb_recv, /* VLAN receive method */ | |
68 | }; | |
69 | ||
1da177e4 LT |
70 | /* End of global variables definitions. */ |
71 | ||
72 | /* | |
73 | * Function vlan_proto_init (pro) | |
74 | * | |
122952fc | 75 | * Initialize VLAN protocol layer, |
1da177e4 LT |
76 | * |
77 | */ | |
78 | static int __init vlan_proto_init(void) | |
79 | { | |
80 | int err; | |
81 | ||
82 | printk(VLAN_INF "%s v%s %s\n", | |
83 | vlan_fullname, vlan_version, vlan_copyright); | |
84 | printk(VLAN_INF "All bugs added by %s\n", | |
85 | vlan_buggyright); | |
86 | ||
87 | /* proc file system initialization */ | |
88 | err = vlan_proc_init(); | |
89 | if (err < 0) { | |
122952fc | 90 | printk(KERN_ERR |
1da177e4 LT |
91 | "%s %s: can't create entry in proc filesystem!\n", |
92 | __FUNCTION__, VLAN_NAME); | |
93 | return err; | |
94 | } | |
95 | ||
96 | dev_add_pack(&vlan_packet_type); | |
97 | ||
98 | /* Register us to receive netdevice events */ | |
99 | err = register_netdevice_notifier(&vlan_notifier_block); | |
07b5b17e PM |
100 | if (err < 0) |
101 | goto err1; | |
1da177e4 | 102 | |
07b5b17e PM |
103 | err = vlan_netlink_init(); |
104 | if (err < 0) | |
105 | goto err2; | |
1da177e4 | 106 | |
07b5b17e | 107 | vlan_ioctl_set(vlan_ioctl_handler); |
1da177e4 | 108 | return 0; |
07b5b17e PM |
109 | |
110 | err2: | |
111 | unregister_netdevice_notifier(&vlan_notifier_block); | |
112 | err1: | |
113 | vlan_proc_cleanup(); | |
114 | dev_remove_pack(&vlan_packet_type); | |
115 | return err; | |
1da177e4 LT |
116 | } |
117 | ||
1da177e4 LT |
118 | /* |
119 | * Module 'remove' entry point. | |
120 | * o delete /proc/net/router directory and static entries. | |
122952fc | 121 | */ |
1da177e4 LT |
122 | static void __exit vlan_cleanup_module(void) |
123 | { | |
124 | int i; | |
125 | ||
07b5b17e | 126 | vlan_netlink_fini(); |
1da177e4 LT |
127 | vlan_ioctl_set(NULL); |
128 | ||
129 | /* Un-register us from receiving netdevice events */ | |
130 | unregister_netdevice_notifier(&vlan_notifier_block); | |
131 | ||
132 | dev_remove_pack(&vlan_packet_type); | |
1da177e4 LT |
133 | |
134 | /* This table must be empty if there are no module | |
135 | * references left. | |
136 | */ | |
137 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) { | |
138 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
139 | } | |
140 | vlan_proc_cleanup(); | |
141 | ||
142 | synchronize_net(); | |
143 | } | |
144 | ||
145 | module_init(vlan_proto_init); | |
146 | module_exit(vlan_cleanup_module); | |
147 | ||
148 | /* Must be invoked with RCU read lock (no preempt) */ | |
149 | static struct vlan_group *__vlan_find_group(int real_dev_ifindex) | |
150 | { | |
151 | struct vlan_group *grp; | |
152 | struct hlist_node *n; | |
153 | int hash = vlan_grp_hashfn(real_dev_ifindex); | |
154 | ||
155 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { | |
156 | if (grp->real_dev_ifindex == real_dev_ifindex) | |
157 | return grp; | |
158 | } | |
159 | ||
160 | return NULL; | |
161 | } | |
162 | ||
163 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. | |
164 | * | |
165 | * Must be invoked with RCU read lock (no preempt) | |
166 | */ | |
167 | struct net_device *__find_vlan_dev(struct net_device *real_dev, | |
168 | unsigned short VID) | |
169 | { | |
170 | struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); | |
171 | ||
172 | if (grp) | |
5c15bdec | 173 | return vlan_group_get_device(grp, VID); |
1da177e4 LT |
174 | |
175 | return NULL; | |
176 | } | |
177 | ||
5c15bdec DA |
178 | static void vlan_group_free(struct vlan_group *grp) |
179 | { | |
180 | int i; | |
181 | ||
182 | for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) | |
183 | kfree(grp->vlan_devices_arrays[i]); | |
184 | kfree(grp); | |
185 | } | |
186 | ||
42429aae PM |
187 | static struct vlan_group *vlan_group_alloc(int ifindex) |
188 | { | |
189 | struct vlan_group *grp; | |
190 | unsigned int size; | |
191 | unsigned int i; | |
192 | ||
193 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
194 | if (!grp) | |
195 | return NULL; | |
196 | ||
197 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
198 | ||
199 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { | |
200 | grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL); | |
201 | if (!grp->vlan_devices_arrays[i]) | |
202 | goto err; | |
203 | } | |
204 | ||
205 | grp->real_dev_ifindex = ifindex; | |
206 | hlist_add_head_rcu(&grp->hlist, | |
207 | &vlan_group_hash[vlan_grp_hashfn(ifindex)]); | |
208 | return grp; | |
209 | ||
210 | err: | |
211 | vlan_group_free(grp); | |
212 | return NULL; | |
213 | } | |
214 | ||
1da177e4 LT |
215 | static void vlan_rcu_free(struct rcu_head *rcu) |
216 | { | |
5c15bdec | 217 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
218 | } |
219 | ||
220 | ||
221 | /* This returns 0 if everything went fine. | |
222 | * It will return 1 if the group was killed as a result. | |
223 | * A negative return indicates failure. | |
224 | * | |
225 | * The RTNL lock must be held. | |
226 | */ | |
227 | static int unregister_vlan_dev(struct net_device *real_dev, | |
228 | unsigned short vlan_id) | |
229 | { | |
230 | struct net_device *dev = NULL; | |
231 | int real_dev_ifindex = real_dev->ifindex; | |
232 | struct vlan_group *grp; | |
233 | int i, ret; | |
234 | ||
235 | #ifdef VLAN_DEBUG | |
236 | printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id); | |
237 | #endif | |
238 | ||
239 | /* sanity check */ | |
240 | if (vlan_id >= VLAN_VID_MASK) | |
241 | return -EINVAL; | |
242 | ||
243 | ASSERT_RTNL(); | |
244 | grp = __vlan_find_group(real_dev_ifindex); | |
245 | ||
246 | ret = 0; | |
247 | ||
248 | if (grp) { | |
5c15bdec | 249 | dev = vlan_group_get_device(grp, vlan_id); |
1da177e4 LT |
250 | if (dev) { |
251 | /* Remove proc entry */ | |
252 | vlan_proc_rem_dev(dev); | |
253 | ||
254 | /* Take it out of our own structures, but be sure to | |
255 | * interlock with HW accelerating devices or SW vlan | |
256 | * input packet processing. | |
257 | */ | |
d2d1acdb | 258 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
1da177e4 | 259 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 260 | |
5c15bdec | 261 | vlan_group_set_device(grp, vlan_id, NULL); |
1da177e4 LT |
262 | synchronize_net(); |
263 | ||
264 | ||
265 | /* Caller unregisters (and if necessary, puts) | |
266 | * VLAN device, but we get rid of the reference to | |
267 | * real_dev here. | |
268 | */ | |
269 | dev_put(real_dev); | |
270 | ||
271 | /* If the group is now empty, kill off the | |
272 | * group. | |
273 | */ | |
274 | for (i = 0; i < VLAN_VID_MASK; i++) | |
5c15bdec | 275 | if (vlan_group_get_device(grp, i)) |
1da177e4 LT |
276 | break; |
277 | ||
278 | if (i == VLAN_VID_MASK) { | |
279 | if (real_dev->features & NETIF_F_HW_VLAN_RX) | |
280 | real_dev->vlan_rx_register(real_dev, NULL); | |
281 | ||
282 | hlist_del_rcu(&grp->hlist); | |
283 | ||
284 | /* Free the group, after all cpu's are done. */ | |
285 | call_rcu(&grp->rcu, vlan_rcu_free); | |
286 | ||
287 | grp = NULL; | |
288 | ret = 1; | |
289 | } | |
290 | } | |
291 | } | |
292 | ||
122952fc | 293 | return ret; |
1da177e4 LT |
294 | } |
295 | ||
07b5b17e | 296 | int unregister_vlan_device(struct net_device *dev) |
1da177e4 | 297 | { |
1da177e4 LT |
298 | int ret; |
299 | ||
c17d8874 PM |
300 | ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, |
301 | VLAN_DEV_INFO(dev)->vlan_id); | |
302 | unregister_netdevice(dev); | |
1da177e4 | 303 | |
c17d8874 PM |
304 | if (ret == 1) |
305 | ret = 0; | |
1da177e4 LT |
306 | return ret; |
307 | } | |
308 | ||
2f4284a4 PM |
309 | /* |
310 | * vlan network devices have devices nesting below it, and are a special | |
311 | * "super class" of normal network devices; split their locks off into a | |
312 | * separate class since they always nest. | |
313 | */ | |
314 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
315 | ||
316 | static int vlan_dev_init(struct net_device *dev) | |
317 | { | |
318 | struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; | |
319 | ||
320 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ | |
321 | dev->flags = real_dev->flags & ~IFF_UP; | |
322 | dev->iflink = real_dev->ifindex; | |
323 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
324 | (1<<__LINK_STATE_DORMANT))) | | |
325 | (1<<__LINK_STATE_PRESENT); | |
326 | ||
0e06877c PM |
327 | if (is_zero_ether_addr(dev->dev_addr)) |
328 | memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); | |
329 | if (is_zero_ether_addr(dev->broadcast)) | |
330 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
2f4284a4 PM |
331 | |
332 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { | |
333 | dev->hard_header = real_dev->hard_header; | |
334 | dev->hard_header_len = real_dev->hard_header_len; | |
335 | dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; | |
336 | dev->rebuild_header = real_dev->rebuild_header; | |
337 | } else { | |
338 | dev->hard_header = vlan_dev_hard_header; | |
339 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
340 | dev->hard_start_xmit = vlan_dev_hard_start_xmit; | |
341 | dev->rebuild_header = vlan_dev_rebuild_header; | |
342 | } | |
343 | dev->hard_header_parse = real_dev->hard_header_parse; | |
8c979c26 | 344 | dev->hard_header_cache = NULL; |
2f4284a4 PM |
345 | |
346 | lockdep_set_class(&dev->_xmit_lock, &vlan_netdev_xmit_lock_key); | |
347 | return 0; | |
348 | } | |
349 | ||
07b5b17e | 350 | void vlan_setup(struct net_device *new_dev) |
1da177e4 LT |
351 | { |
352 | SET_MODULE_OWNER(new_dev); | |
122952fc | 353 | |
8c979c26 PM |
354 | ether_setup(new_dev); |
355 | ||
1da177e4 LT |
356 | /* new_dev->ifindex = 0; it will be set when added to |
357 | * the global list. | |
358 | * iflink is set as well. | |
359 | */ | |
360 | new_dev->get_stats = vlan_dev_get_stats; | |
361 | ||
362 | /* Make this thing known as a VLAN device */ | |
363 | new_dev->priv_flags |= IFF_802_1Q_VLAN; | |
122952fc | 364 | |
1da177e4 LT |
365 | /* Set us up to have no queue, as the underlying Hardware device |
366 | * can do all the queueing we could want. | |
367 | */ | |
368 | new_dev->tx_queue_len = 0; | |
369 | ||
370 | /* set up method calls */ | |
371 | new_dev->change_mtu = vlan_dev_change_mtu; | |
2f4284a4 | 372 | new_dev->init = vlan_dev_init; |
1da177e4 LT |
373 | new_dev->open = vlan_dev_open; |
374 | new_dev->stop = vlan_dev_stop; | |
1da177e4 | 375 | new_dev->set_multicast_list = vlan_dev_set_multicast_list; |
6c78dcbd | 376 | new_dev->change_rx_flags = vlan_change_rx_flags; |
1da177e4 LT |
377 | new_dev->destructor = free_netdev; |
378 | new_dev->do_ioctl = vlan_dev_ioctl; | |
0e06877c | 379 | |
a7ecfc86 | 380 | memset(new_dev->broadcast, 0, ETH_ALEN); |
1da177e4 LT |
381 | } |
382 | ||
ddd7bf9f SR |
383 | static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) |
384 | { | |
385 | /* Have to respect userspace enforced dormant state | |
386 | * of real device, also must allow supplicant running | |
387 | * on VLAN device | |
388 | */ | |
389 | if (dev->operstate == IF_OPER_DORMANT) | |
390 | netif_dormant_on(vlandev); | |
391 | else | |
392 | netif_dormant_off(vlandev); | |
393 | ||
394 | if (netif_carrier_ok(dev)) { | |
395 | if (!netif_carrier_ok(vlandev)) | |
396 | netif_carrier_on(vlandev); | |
397 | } else { | |
398 | if (netif_carrier_ok(vlandev)) | |
399 | netif_carrier_off(vlandev); | |
400 | } | |
401 | } | |
402 | ||
07b5b17e | 403 | int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id) |
1da177e4 | 404 | { |
1da177e4 LT |
405 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
406 | printk(VLAN_DBG "%s: VLANs not supported on %s.\n", | |
407 | __FUNCTION__, real_dev->name); | |
c1d3ee99 | 408 | return -EOPNOTSUPP; |
1da177e4 LT |
409 | } |
410 | ||
411 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && | |
d2d1acdb | 412 | !real_dev->vlan_rx_register) { |
1da177e4 LT |
413 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", |
414 | __FUNCTION__, real_dev->name); | |
c1d3ee99 | 415 | return -EOPNOTSUPP; |
1da177e4 LT |
416 | } |
417 | ||
418 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
d2d1acdb | 419 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
1da177e4 LT |
420 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", |
421 | __FUNCTION__, real_dev->name); | |
c1d3ee99 | 422 | return -EOPNOTSUPP; |
1da177e4 LT |
423 | } |
424 | ||
1da177e4 LT |
425 | /* The real device must be up and operating in order to |
426 | * assosciate a VLAN device with it. | |
427 | */ | |
428 | if (!(real_dev->flags & IFF_UP)) | |
c1d3ee99 | 429 | return -ENETDOWN; |
1da177e4 | 430 | |
c1d3ee99 | 431 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) { |
1da177e4 LT |
432 | /* was already registered. */ |
433 | printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); | |
c1d3ee99 | 434 | return -EEXIST; |
1da177e4 LT |
435 | } |
436 | ||
c1d3ee99 PM |
437 | return 0; |
438 | } | |
439 | ||
07b5b17e | 440 | int register_vlan_dev(struct net_device *dev) |
e89fe42c PM |
441 | { |
442 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); | |
443 | struct net_device *real_dev = vlan->real_dev; | |
444 | unsigned short vlan_id = vlan->vlan_id; | |
445 | struct vlan_group *grp, *ngrp = NULL; | |
446 | int err; | |
447 | ||
448 | grp = __vlan_find_group(real_dev->ifindex); | |
449 | if (!grp) { | |
450 | ngrp = grp = vlan_group_alloc(real_dev->ifindex); | |
451 | if (!grp) | |
452 | return -ENOBUFS; | |
453 | } | |
454 | ||
455 | err = register_netdevice(dev); | |
456 | if (err < 0) | |
457 | goto out_free_group; | |
458 | ||
459 | /* Account for reference in struct vlan_dev_info */ | |
460 | dev_hold(real_dev); | |
461 | ||
462 | vlan_transfer_operstate(real_dev, dev); | |
463 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
464 | ||
465 | /* So, got the sucker initialized, now lets place | |
466 | * it into our local structure. | |
467 | */ | |
468 | vlan_group_set_device(grp, vlan_id, dev); | |
469 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) | |
470 | real_dev->vlan_rx_register(real_dev, ngrp); | |
471 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
472 | real_dev->vlan_rx_add_vid(real_dev, vlan_id); | |
473 | ||
474 | if (vlan_proc_add_dev(dev) < 0) | |
475 | printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", | |
476 | dev->name); | |
477 | return 0; | |
478 | ||
479 | out_free_group: | |
480 | if (ngrp) | |
481 | vlan_group_free(ngrp); | |
482 | return err; | |
483 | } | |
484 | ||
c1d3ee99 | 485 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 486 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 487 | */ |
2ae0bf69 PM |
488 | static int register_vlan_device(struct net_device *real_dev, |
489 | unsigned short VLAN_ID) | |
c1d3ee99 | 490 | { |
c1d3ee99 PM |
491 | struct net_device *new_dev; |
492 | char name[IFNAMSIZ]; | |
2ae0bf69 | 493 | int err; |
c1d3ee99 PM |
494 | |
495 | #ifdef VLAN_DEBUG | |
496 | printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", | |
497 | __FUNCTION__, eth_IF_name, VLAN_ID); | |
498 | #endif | |
499 | ||
500 | if (VLAN_ID >= VLAN_VID_MASK) | |
2ae0bf69 | 501 | return -ERANGE; |
c1d3ee99 | 502 | |
2ae0bf69 PM |
503 | err = vlan_check_real_dev(real_dev, VLAN_ID); |
504 | if (err < 0) | |
505 | return err; | |
c1d3ee99 | 506 | |
1da177e4 LT |
507 | /* Gotta set up the fields for the device. */ |
508 | #ifdef VLAN_DEBUG | |
509 | printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", | |
510 | vlan_name_type); | |
511 | #endif | |
512 | switch (vlan_name_type) { | |
513 | case VLAN_NAME_TYPE_RAW_PLUS_VID: | |
514 | /* name will look like: eth1.0005 */ | |
515 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); | |
516 | break; | |
517 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
518 | /* Put our vlan.VID in the name. | |
519 | * Name will look like: vlan5 | |
520 | */ | |
521 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); | |
522 | break; | |
523 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
524 | /* Put our vlan.VID in the name. | |
525 | * Name will look like: eth0.5 | |
526 | */ | |
527 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); | |
528 | break; | |
529 | case VLAN_NAME_TYPE_PLUS_VID: | |
530 | /* Put our vlan.VID in the name. | |
531 | * Name will look like: vlan0005 | |
532 | */ | |
533 | default: | |
534 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); | |
3ff50b79 | 535 | } |
122952fc | 536 | |
1da177e4 LT |
537 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
538 | vlan_setup); | |
5dd8d1e9 | 539 | |
1da177e4 | 540 | if (new_dev == NULL) |
2ae0bf69 | 541 | return -ENOBUFS; |
1da177e4 | 542 | |
1da177e4 LT |
543 | /* need 4 bytes for extra VLAN header info, |
544 | * hope the underlying device can handle it. | |
545 | */ | |
546 | new_dev->mtu = real_dev->mtu; | |
547 | ||
2f4284a4 PM |
548 | #ifdef VLAN_DEBUG |
549 | printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); | |
1da177e4 LT |
550 | VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", |
551 | new_dev->priv, | |
552 | sizeof(struct vlan_dev_info)); | |
2f4284a4 | 553 | #endif |
1da177e4 LT |
554 | |
555 | VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ | |
556 | VLAN_DEV_INFO(new_dev)->real_dev = real_dev; | |
557 | VLAN_DEV_INFO(new_dev)->dent = NULL; | |
a4bf3af4 | 558 | VLAN_DEV_INFO(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
1da177e4 | 559 | |
07b5b17e | 560 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
561 | err = register_vlan_dev(new_dev); |
562 | if (err < 0) | |
e89fe42c | 563 | goto out_free_newdev; |
1da177e4 | 564 | |
1da177e4 LT |
565 | #ifdef VLAN_DEBUG |
566 | printk(VLAN_DBG "Allocated new device successfully, returning.\n"); | |
567 | #endif | |
2ae0bf69 | 568 | return 0; |
1da177e4 | 569 | |
1da177e4 LT |
570 | out_free_newdev: |
571 | free_netdev(new_dev); | |
2ae0bf69 | 572 | return err; |
1da177e4 LT |
573 | } |
574 | ||
8c979c26 PM |
575 | static void vlan_sync_address(struct net_device *dev, |
576 | struct net_device *vlandev) | |
577 | { | |
578 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(vlandev); | |
579 | ||
580 | /* May be called without an actual change */ | |
581 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
582 | return; | |
583 | ||
584 | /* vlan address was different from the old address and is equal to | |
585 | * the new address */ | |
586 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
587 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
588 | dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); | |
589 | ||
590 | /* vlan address was equal to the old address and is different from | |
591 | * the new address */ | |
592 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
593 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
594 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); | |
595 | ||
596 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
597 | } | |
598 | ||
1da177e4 LT |
599 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) |
600 | { | |
601 | struct net_device *dev = ptr; | |
602 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); | |
603 | int i, flgs; | |
604 | struct net_device *vlandev; | |
605 | ||
606 | if (!grp) | |
607 | goto out; | |
608 | ||
609 | /* It is OK that we do not hold the group lock right now, | |
610 | * as we run under the RTNL lock. | |
611 | */ | |
612 | ||
613 | switch (event) { | |
614 | case NETDEV_CHANGE: | |
615 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 616 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 617 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
618 | if (!vlandev) |
619 | continue; | |
620 | ||
ddd7bf9f | 621 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
622 | } |
623 | break; | |
624 | ||
8c979c26 PM |
625 | case NETDEV_CHANGEADDR: |
626 | /* Adjust unicast filters on underlying device */ | |
627 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
628 | vlandev = vlan_group_get_device(grp, i); | |
629 | if (!vlandev) | |
630 | continue; | |
631 | ||
632 | vlan_sync_address(dev, vlandev); | |
633 | } | |
634 | break; | |
635 | ||
1da177e4 LT |
636 | case NETDEV_DOWN: |
637 | /* Put all VLANs for this dev in the down state too. */ | |
638 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 639 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
640 | if (!vlandev) |
641 | continue; | |
642 | ||
643 | flgs = vlandev->flags; | |
644 | if (!(flgs & IFF_UP)) | |
645 | continue; | |
646 | ||
647 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
648 | } | |
649 | break; | |
650 | ||
651 | case NETDEV_UP: | |
652 | /* Put all VLANs for this dev in the up state too. */ | |
653 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 654 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
655 | if (!vlandev) |
656 | continue; | |
122952fc | 657 | |
1da177e4 LT |
658 | flgs = vlandev->flags; |
659 | if (flgs & IFF_UP) | |
660 | continue; | |
661 | ||
662 | dev_change_flags(vlandev, flgs | IFF_UP); | |
663 | } | |
664 | break; | |
122952fc | 665 | |
1da177e4 LT |
666 | case NETDEV_UNREGISTER: |
667 | /* Delete all VLANs for this dev. */ | |
668 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
669 | int ret; | |
670 | ||
5c15bdec | 671 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
672 | if (!vlandev) |
673 | continue; | |
674 | ||
675 | ret = unregister_vlan_dev(dev, | |
676 | VLAN_DEV_INFO(vlandev)->vlan_id); | |
677 | ||
678 | unregister_netdevice(vlandev); | |
679 | ||
680 | /* Group was destroyed? */ | |
681 | if (ret == 1) | |
682 | break; | |
683 | } | |
684 | break; | |
3ff50b79 | 685 | } |
1da177e4 LT |
686 | |
687 | out: | |
688 | return NOTIFY_DONE; | |
689 | } | |
690 | ||
691 | /* | |
692 | * VLAN IOCTL handler. | |
693 | * o execute requested action or pass command to the device driver | |
694 | * arg is really a struct vlan_ioctl_args __user *. | |
695 | */ | |
696 | static int vlan_ioctl_handler(void __user *arg) | |
697 | { | |
c17d8874 | 698 | int err; |
1da177e4 LT |
699 | unsigned short vid = 0; |
700 | struct vlan_ioctl_args args; | |
c17d8874 | 701 | struct net_device *dev = NULL; |
1da177e4 LT |
702 | |
703 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
704 | return -EFAULT; | |
705 | ||
706 | /* Null terminate this sucker, just in case. */ | |
707 | args.device1[23] = 0; | |
708 | args.u.device2[23] = 0; | |
709 | ||
710 | #ifdef VLAN_DEBUG | |
711 | printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); | |
712 | #endif | |
713 | ||
c17d8874 PM |
714 | rtnl_lock(); |
715 | ||
1da177e4 LT |
716 | switch (args.cmd) { |
717 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
718 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
719 | case SET_VLAN_FLAG_CMD: | |
720 | case ADD_VLAN_CMD: | |
721 | case DEL_VLAN_CMD: | |
722 | case GET_VLAN_REALDEV_NAME_CMD: | |
723 | case GET_VLAN_VID_CMD: | |
724 | err = -ENODEV; | |
725 | dev = __dev_get_by_name(args.device1); | |
726 | if (!dev) | |
727 | goto out; | |
728 | ||
729 | err = -EINVAL; | |
730 | if (args.cmd != ADD_VLAN_CMD && | |
731 | !(dev->priv_flags & IFF_802_1Q_VLAN)) | |
732 | goto out; | |
733 | } | |
734 | ||
735 | switch (args.cmd) { | |
736 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
737 | err = -EPERM; | |
1da177e4 | 738 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
739 | break; |
740 | vlan_dev_set_ingress_priority(dev, | |
741 | args.u.skb_priority, | |
742 | args.vlan_qos); | |
1da177e4 LT |
743 | break; |
744 | ||
745 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 746 | err = -EPERM; |
1da177e4 | 747 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
748 | break; |
749 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
750 | args.u.skb_priority, |
751 | args.vlan_qos); | |
752 | break; | |
753 | ||
754 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 755 | err = -EPERM; |
1da177e4 | 756 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
757 | break; |
758 | err = vlan_dev_set_vlan_flag(dev, | |
1da177e4 LT |
759 | args.u.flag, |
760 | args.vlan_qos); | |
761 | break; | |
762 | ||
763 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 764 | err = -EPERM; |
1da177e4 LT |
765 | if (!capable(CAP_NET_ADMIN)) |
766 | return -EPERM; | |
c17d8874 PM |
767 | if ((args.u.name_type >= 0) && |
768 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
1da177e4 LT |
769 | vlan_name_type = args.u.name_type; |
770 | err = 0; | |
771 | } else { | |
772 | err = -EINVAL; | |
773 | } | |
774 | break; | |
775 | ||
776 | case ADD_VLAN_CMD: | |
c17d8874 | 777 | err = -EPERM; |
1da177e4 | 778 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 779 | break; |
2ae0bf69 | 780 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
781 | break; |
782 | ||
783 | case DEL_VLAN_CMD: | |
c17d8874 | 784 | err = -EPERM; |
1da177e4 | 785 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
786 | break; |
787 | err = unregister_vlan_device(dev); | |
1da177e4 LT |
788 | break; |
789 | ||
790 | case GET_VLAN_INGRESS_PRIORITY_CMD: | |
791 | /* TODO: Implement | |
792 | err = vlan_dev_get_ingress_priority(args); | |
793 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
794 | sizeof(struct vlan_ioctl_args))) { |
795 | err = -EFAULT; | |
1da177e4 LT |
796 | } |
797 | */ | |
798 | err = -EINVAL; | |
799 | break; | |
800 | case GET_VLAN_EGRESS_PRIORITY_CMD: | |
801 | /* TODO: Implement | |
802 | err = vlan_dev_get_egress_priority(args.device1, &(args.args); | |
803 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
804 | sizeof(struct vlan_ioctl_args))) { |
805 | err = -EFAULT; | |
1da177e4 LT |
806 | } |
807 | */ | |
808 | err = -EINVAL; | |
809 | break; | |
810 | case GET_VLAN_REALDEV_NAME_CMD: | |
3f5f4346 | 811 | err = 0; |
c17d8874 | 812 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 LT |
813 | if (copy_to_user(arg, &args, |
814 | sizeof(struct vlan_ioctl_args))) { | |
815 | err = -EFAULT; | |
816 | } | |
817 | break; | |
818 | ||
819 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 820 | err = 0; |
c17d8874 | 821 | vlan_dev_get_vid(dev, &vid); |
1da177e4 LT |
822 | args.u.VID = vid; |
823 | if (copy_to_user(arg, &args, | |
824 | sizeof(struct vlan_ioctl_args))) { | |
122952fc | 825 | err = -EFAULT; |
1da177e4 LT |
826 | } |
827 | break; | |
828 | ||
829 | default: | |
830 | /* pass on to underlying device instead?? */ | |
831 | printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", | |
832 | __FUNCTION__, args.cmd); | |
c17d8874 PM |
833 | err = -EINVAL; |
834 | break; | |
3ff50b79 | 835 | } |
7eb1b3d3 | 836 | out: |
c17d8874 | 837 | rtnl_unlock(); |
1da177e4 LT |
838 | return err; |
839 | } | |
840 | ||
841 | MODULE_LICENSE("GPL"); | |
842 | MODULE_VERSION(DRV_VERSION); |