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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> | |
e9dc8653 | 34 | #include <net/net_namespace.h> |
1da177e4 LT |
35 | |
36 | #include <linux/if_vlan.h> | |
37 | #include "vlan.h" | |
38 | #include "vlanproc.h" | |
39 | ||
40 | #define DRV_VERSION "1.8" | |
41 | ||
42 | /* Global VLAN variables */ | |
43 | ||
44 | /* Our listing of VLAN group(s) */ | |
45 | static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; | |
46 | #define vlan_grp_hashfn(IDX) ((((IDX) >> VLAN_GRP_HASH_SHIFT) ^ (IDX)) & VLAN_GRP_HASH_MASK) | |
47 | ||
48 | static char vlan_fullname[] = "802.1Q VLAN Support"; | |
49 | static char vlan_version[] = DRV_VERSION; | |
50 | static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
51 | static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
52 | ||
53 | static int vlan_device_event(struct notifier_block *, unsigned long, void *); | |
881d966b | 54 | static int vlan_ioctl_handler(struct net *net, void __user *); |
1da177e4 LT |
55 | static int unregister_vlan_dev(struct net_device *, unsigned short ); |
56 | ||
57 | static struct notifier_block vlan_notifier_block = { | |
58 | .notifier_call = vlan_device_event, | |
59 | }; | |
60 | ||
61 | /* These may be changed at run-time through IOCTLs */ | |
62 | ||
63 | /* Determines interface naming scheme. */ | |
64 | unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; | |
65 | ||
66 | static struct packet_type vlan_packet_type = { | |
67 | .type = __constant_htons(ETH_P_8021Q), | |
68 | .func = vlan_skb_recv, /* VLAN receive method */ | |
69 | }; | |
70 | ||
1da177e4 LT |
71 | /* End of global variables definitions. */ |
72 | ||
73 | /* | |
74 | * Function vlan_proto_init (pro) | |
75 | * | |
122952fc | 76 | * Initialize VLAN protocol layer, |
1da177e4 LT |
77 | * |
78 | */ | |
79 | static int __init vlan_proto_init(void) | |
80 | { | |
81 | int err; | |
82 | ||
83 | printk(VLAN_INF "%s v%s %s\n", | |
84 | vlan_fullname, vlan_version, vlan_copyright); | |
85 | printk(VLAN_INF "All bugs added by %s\n", | |
86 | vlan_buggyright); | |
87 | ||
88 | /* proc file system initialization */ | |
89 | err = vlan_proc_init(); | |
90 | if (err < 0) { | |
122952fc | 91 | printk(KERN_ERR |
b7a4a836 PM |
92 | "%s: can't create entry in proc filesystem!\n", |
93 | __FUNCTION__); | |
1da177e4 LT |
94 | return err; |
95 | } | |
96 | ||
97 | dev_add_pack(&vlan_packet_type); | |
98 | ||
99 | /* Register us to receive netdevice events */ | |
100 | err = register_netdevice_notifier(&vlan_notifier_block); | |
07b5b17e PM |
101 | if (err < 0) |
102 | goto err1; | |
1da177e4 | 103 | |
07b5b17e PM |
104 | err = vlan_netlink_init(); |
105 | if (err < 0) | |
106 | goto err2; | |
1da177e4 | 107 | |
07b5b17e | 108 | vlan_ioctl_set(vlan_ioctl_handler); |
1da177e4 | 109 | return 0; |
07b5b17e PM |
110 | |
111 | err2: | |
112 | unregister_netdevice_notifier(&vlan_notifier_block); | |
113 | err1: | |
114 | vlan_proc_cleanup(); | |
115 | dev_remove_pack(&vlan_packet_type); | |
116 | return err; | |
1da177e4 LT |
117 | } |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Module 'remove' entry point. | |
121 | * o delete /proc/net/router directory and static entries. | |
122952fc | 122 | */ |
1da177e4 LT |
123 | static void __exit vlan_cleanup_module(void) |
124 | { | |
125 | int i; | |
126 | ||
127 | vlan_ioctl_set(NULL); | |
3f03e387 | 128 | vlan_netlink_fini(); |
1da177e4 LT |
129 | |
130 | /* Un-register us from receiving netdevice events */ | |
131 | unregister_netdevice_notifier(&vlan_notifier_block); | |
132 | ||
133 | dev_remove_pack(&vlan_packet_type); | |
1da177e4 LT |
134 | |
135 | /* This table must be empty if there are no module | |
136 | * references left. | |
137 | */ | |
138 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) { | |
139 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
140 | } | |
141 | vlan_proc_cleanup(); | |
142 | ||
143 | synchronize_net(); | |
144 | } | |
145 | ||
146 | module_init(vlan_proto_init); | |
147 | module_exit(vlan_cleanup_module); | |
148 | ||
149 | /* Must be invoked with RCU read lock (no preempt) */ | |
150 | static struct vlan_group *__vlan_find_group(int real_dev_ifindex) | |
151 | { | |
152 | struct vlan_group *grp; | |
153 | struct hlist_node *n; | |
154 | int hash = vlan_grp_hashfn(real_dev_ifindex); | |
155 | ||
156 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { | |
157 | if (grp->real_dev_ifindex == real_dev_ifindex) | |
158 | return grp; | |
159 | } | |
160 | ||
161 | return NULL; | |
162 | } | |
163 | ||
164 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. | |
165 | * | |
166 | * Must be invoked with RCU read lock (no preempt) | |
167 | */ | |
168 | struct net_device *__find_vlan_dev(struct net_device *real_dev, | |
169 | unsigned short VID) | |
170 | { | |
171 | struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); | |
172 | ||
173 | if (grp) | |
5c15bdec | 174 | return vlan_group_get_device(grp, VID); |
1da177e4 LT |
175 | |
176 | return NULL; | |
177 | } | |
178 | ||
5c15bdec DA |
179 | static void vlan_group_free(struct vlan_group *grp) |
180 | { | |
181 | int i; | |
182 | ||
183 | for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) | |
184 | kfree(grp->vlan_devices_arrays[i]); | |
185 | kfree(grp); | |
186 | } | |
187 | ||
42429aae PM |
188 | static struct vlan_group *vlan_group_alloc(int ifindex) |
189 | { | |
190 | struct vlan_group *grp; | |
191 | unsigned int size; | |
192 | unsigned int i; | |
193 | ||
194 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
195 | if (!grp) | |
196 | return NULL; | |
197 | ||
198 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
199 | ||
200 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { | |
201 | grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL); | |
202 | if (!grp->vlan_devices_arrays[i]) | |
203 | goto err; | |
204 | } | |
205 | ||
206 | grp->real_dev_ifindex = ifindex; | |
207 | hlist_add_head_rcu(&grp->hlist, | |
208 | &vlan_group_hash[vlan_grp_hashfn(ifindex)]); | |
209 | return grp; | |
210 | ||
211 | err: | |
212 | vlan_group_free(grp); | |
213 | return NULL; | |
214 | } | |
215 | ||
1da177e4 LT |
216 | static void vlan_rcu_free(struct rcu_head *rcu) |
217 | { | |
5c15bdec | 218 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
219 | } |
220 | ||
221 | ||
222 | /* This returns 0 if everything went fine. | |
223 | * It will return 1 if the group was killed as a result. | |
224 | * A negative return indicates failure. | |
225 | * | |
226 | * The RTNL lock must be held. | |
227 | */ | |
228 | static int unregister_vlan_dev(struct net_device *real_dev, | |
229 | unsigned short vlan_id) | |
230 | { | |
231 | struct net_device *dev = NULL; | |
232 | int real_dev_ifindex = real_dev->ifindex; | |
233 | struct vlan_group *grp; | |
234 | int i, ret; | |
235 | ||
236 | #ifdef VLAN_DEBUG | |
237 | printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id); | |
238 | #endif | |
239 | ||
240 | /* sanity check */ | |
241 | if (vlan_id >= VLAN_VID_MASK) | |
242 | return -EINVAL; | |
243 | ||
244 | ASSERT_RTNL(); | |
245 | grp = __vlan_find_group(real_dev_ifindex); | |
246 | ||
247 | ret = 0; | |
248 | ||
249 | if (grp) { | |
5c15bdec | 250 | dev = vlan_group_get_device(grp, vlan_id); |
1da177e4 LT |
251 | if (dev) { |
252 | /* Remove proc entry */ | |
253 | vlan_proc_rem_dev(dev); | |
254 | ||
255 | /* Take it out of our own structures, but be sure to | |
256 | * interlock with HW accelerating devices or SW vlan | |
257 | * input packet processing. | |
258 | */ | |
d2d1acdb | 259 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
1da177e4 | 260 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 261 | |
5c15bdec | 262 | vlan_group_set_device(grp, vlan_id, NULL); |
1da177e4 LT |
263 | synchronize_net(); |
264 | ||
265 | ||
266 | /* Caller unregisters (and if necessary, puts) | |
267 | * VLAN device, but we get rid of the reference to | |
268 | * real_dev here. | |
269 | */ | |
270 | dev_put(real_dev); | |
271 | ||
272 | /* If the group is now empty, kill off the | |
273 | * group. | |
274 | */ | |
275 | for (i = 0; i < VLAN_VID_MASK; i++) | |
5c15bdec | 276 | if (vlan_group_get_device(grp, i)) |
1da177e4 LT |
277 | break; |
278 | ||
279 | if (i == VLAN_VID_MASK) { | |
280 | if (real_dev->features & NETIF_F_HW_VLAN_RX) | |
281 | real_dev->vlan_rx_register(real_dev, NULL); | |
282 | ||
283 | hlist_del_rcu(&grp->hlist); | |
284 | ||
285 | /* Free the group, after all cpu's are done. */ | |
286 | call_rcu(&grp->rcu, vlan_rcu_free); | |
287 | ||
288 | grp = NULL; | |
289 | ret = 1; | |
290 | } | |
291 | } | |
292 | } | |
293 | ||
122952fc | 294 | return ret; |
1da177e4 LT |
295 | } |
296 | ||
07b5b17e | 297 | int unregister_vlan_device(struct net_device *dev) |
1da177e4 | 298 | { |
1da177e4 LT |
299 | int ret; |
300 | ||
c17d8874 PM |
301 | ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, |
302 | VLAN_DEV_INFO(dev)->vlan_id); | |
303 | unregister_netdevice(dev); | |
1da177e4 | 304 | |
c17d8874 PM |
305 | if (ret == 1) |
306 | ret = 0; | |
1da177e4 LT |
307 | return ret; |
308 | } | |
309 | ||
ddd7bf9f SR |
310 | static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) |
311 | { | |
312 | /* Have to respect userspace enforced dormant state | |
313 | * of real device, also must allow supplicant running | |
314 | * on VLAN device | |
315 | */ | |
316 | if (dev->operstate == IF_OPER_DORMANT) | |
317 | netif_dormant_on(vlandev); | |
318 | else | |
319 | netif_dormant_off(vlandev); | |
320 | ||
321 | if (netif_carrier_ok(dev)) { | |
322 | if (!netif_carrier_ok(vlandev)) | |
323 | netif_carrier_on(vlandev); | |
324 | } else { | |
325 | if (netif_carrier_ok(vlandev)) | |
326 | netif_carrier_off(vlandev); | |
327 | } | |
328 | } | |
329 | ||
07b5b17e | 330 | int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id) |
1da177e4 | 331 | { |
1da177e4 LT |
332 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
333 | printk(VLAN_DBG "%s: VLANs not supported on %s.\n", | |
334 | __FUNCTION__, real_dev->name); | |
c1d3ee99 | 335 | return -EOPNOTSUPP; |
1da177e4 LT |
336 | } |
337 | ||
338 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && | |
d2d1acdb | 339 | !real_dev->vlan_rx_register) { |
1da177e4 LT |
340 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", |
341 | __FUNCTION__, real_dev->name); | |
c1d3ee99 | 342 | return -EOPNOTSUPP; |
1da177e4 LT |
343 | } |
344 | ||
345 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
d2d1acdb | 346 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
1da177e4 LT |
347 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", |
348 | __FUNCTION__, real_dev->name); | |
c1d3ee99 | 349 | return -EOPNOTSUPP; |
1da177e4 LT |
350 | } |
351 | ||
1da177e4 LT |
352 | /* The real device must be up and operating in order to |
353 | * assosciate a VLAN device with it. | |
354 | */ | |
355 | if (!(real_dev->flags & IFF_UP)) | |
c1d3ee99 | 356 | return -ENETDOWN; |
1da177e4 | 357 | |
c1d3ee99 | 358 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) { |
1da177e4 LT |
359 | /* was already registered. */ |
360 | printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); | |
c1d3ee99 | 361 | return -EEXIST; |
1da177e4 LT |
362 | } |
363 | ||
c1d3ee99 PM |
364 | return 0; |
365 | } | |
366 | ||
07b5b17e | 367 | int register_vlan_dev(struct net_device *dev) |
e89fe42c PM |
368 | { |
369 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); | |
370 | struct net_device *real_dev = vlan->real_dev; | |
371 | unsigned short vlan_id = vlan->vlan_id; | |
372 | struct vlan_group *grp, *ngrp = NULL; | |
373 | int err; | |
374 | ||
375 | grp = __vlan_find_group(real_dev->ifindex); | |
376 | if (!grp) { | |
377 | ngrp = grp = vlan_group_alloc(real_dev->ifindex); | |
378 | if (!grp) | |
379 | return -ENOBUFS; | |
380 | } | |
381 | ||
382 | err = register_netdevice(dev); | |
383 | if (err < 0) | |
384 | goto out_free_group; | |
385 | ||
386 | /* Account for reference in struct vlan_dev_info */ | |
387 | dev_hold(real_dev); | |
388 | ||
389 | vlan_transfer_operstate(real_dev, dev); | |
390 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
391 | ||
392 | /* So, got the sucker initialized, now lets place | |
393 | * it into our local structure. | |
394 | */ | |
395 | vlan_group_set_device(grp, vlan_id, dev); | |
396 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) | |
397 | real_dev->vlan_rx_register(real_dev, ngrp); | |
398 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
399 | real_dev->vlan_rx_add_vid(real_dev, vlan_id); | |
400 | ||
401 | if (vlan_proc_add_dev(dev) < 0) | |
402 | printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", | |
403 | dev->name); | |
404 | return 0; | |
405 | ||
406 | out_free_group: | |
407 | if (ngrp) | |
408 | vlan_group_free(ngrp); | |
409 | return err; | |
410 | } | |
411 | ||
c1d3ee99 | 412 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 413 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 414 | */ |
2ae0bf69 PM |
415 | static int register_vlan_device(struct net_device *real_dev, |
416 | unsigned short VLAN_ID) | |
c1d3ee99 | 417 | { |
c1d3ee99 PM |
418 | struct net_device *new_dev; |
419 | char name[IFNAMSIZ]; | |
2ae0bf69 | 420 | int err; |
c1d3ee99 PM |
421 | |
422 | #ifdef VLAN_DEBUG | |
423 | printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", | |
424 | __FUNCTION__, eth_IF_name, VLAN_ID); | |
425 | #endif | |
426 | ||
427 | if (VLAN_ID >= VLAN_VID_MASK) | |
2ae0bf69 | 428 | return -ERANGE; |
c1d3ee99 | 429 | |
2ae0bf69 PM |
430 | err = vlan_check_real_dev(real_dev, VLAN_ID); |
431 | if (err < 0) | |
432 | return err; | |
c1d3ee99 | 433 | |
1da177e4 LT |
434 | /* Gotta set up the fields for the device. */ |
435 | #ifdef VLAN_DEBUG | |
436 | printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", | |
437 | vlan_name_type); | |
438 | #endif | |
439 | switch (vlan_name_type) { | |
440 | case VLAN_NAME_TYPE_RAW_PLUS_VID: | |
441 | /* name will look like: eth1.0005 */ | |
442 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); | |
443 | break; | |
444 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
445 | /* Put our vlan.VID in the name. | |
446 | * Name will look like: vlan5 | |
447 | */ | |
448 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); | |
449 | break; | |
450 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
451 | /* Put our vlan.VID in the name. | |
452 | * Name will look like: eth0.5 | |
453 | */ | |
454 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); | |
455 | break; | |
456 | case VLAN_NAME_TYPE_PLUS_VID: | |
457 | /* Put our vlan.VID in the name. | |
458 | * Name will look like: vlan0005 | |
459 | */ | |
460 | default: | |
461 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); | |
3ff50b79 | 462 | } |
122952fc | 463 | |
1da177e4 LT |
464 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
465 | vlan_setup); | |
5dd8d1e9 | 466 | |
1da177e4 | 467 | if (new_dev == NULL) |
2ae0bf69 | 468 | return -ENOBUFS; |
1da177e4 | 469 | |
1da177e4 LT |
470 | /* need 4 bytes for extra VLAN header info, |
471 | * hope the underlying device can handle it. | |
472 | */ | |
473 | new_dev->mtu = real_dev->mtu; | |
474 | ||
2f4284a4 PM |
475 | #ifdef VLAN_DEBUG |
476 | printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); | |
1da177e4 LT |
477 | VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", |
478 | new_dev->priv, | |
479 | sizeof(struct vlan_dev_info)); | |
2f4284a4 | 480 | #endif |
1da177e4 LT |
481 | |
482 | VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ | |
483 | VLAN_DEV_INFO(new_dev)->real_dev = real_dev; | |
484 | VLAN_DEV_INFO(new_dev)->dent = NULL; | |
a4bf3af4 | 485 | VLAN_DEV_INFO(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
1da177e4 | 486 | |
07b5b17e | 487 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
488 | err = register_vlan_dev(new_dev); |
489 | if (err < 0) | |
e89fe42c | 490 | goto out_free_newdev; |
1da177e4 | 491 | |
1da177e4 LT |
492 | #ifdef VLAN_DEBUG |
493 | printk(VLAN_DBG "Allocated new device successfully, returning.\n"); | |
494 | #endif | |
2ae0bf69 | 495 | return 0; |
1da177e4 | 496 | |
1da177e4 LT |
497 | out_free_newdev: |
498 | free_netdev(new_dev); | |
2ae0bf69 | 499 | return err; |
1da177e4 LT |
500 | } |
501 | ||
8c979c26 PM |
502 | static void vlan_sync_address(struct net_device *dev, |
503 | struct net_device *vlandev) | |
504 | { | |
505 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(vlandev); | |
506 | ||
507 | /* May be called without an actual change */ | |
508 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
509 | return; | |
510 | ||
511 | /* vlan address was different from the old address and is equal to | |
512 | * the new address */ | |
513 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
514 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
515 | dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); | |
516 | ||
517 | /* vlan address was equal to the old address and is different from | |
518 | * the new address */ | |
519 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
520 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
521 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); | |
522 | ||
523 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
524 | } | |
525 | ||
1da177e4 LT |
526 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) |
527 | { | |
528 | struct net_device *dev = ptr; | |
529 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); | |
530 | int i, flgs; | |
531 | struct net_device *vlandev; | |
532 | ||
e9dc8653 EB |
533 | if (dev->nd_net != &init_net) |
534 | return NOTIFY_DONE; | |
535 | ||
1da177e4 LT |
536 | if (!grp) |
537 | goto out; | |
538 | ||
539 | /* It is OK that we do not hold the group lock right now, | |
540 | * as we run under the RTNL lock. | |
541 | */ | |
542 | ||
543 | switch (event) { | |
544 | case NETDEV_CHANGE: | |
545 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 546 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 547 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
548 | if (!vlandev) |
549 | continue; | |
550 | ||
ddd7bf9f | 551 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
552 | } |
553 | break; | |
554 | ||
8c979c26 PM |
555 | case NETDEV_CHANGEADDR: |
556 | /* Adjust unicast filters on underlying device */ | |
557 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
558 | vlandev = vlan_group_get_device(grp, i); | |
559 | if (!vlandev) | |
560 | continue; | |
561 | ||
d932e04a PM |
562 | flgs = vlandev->flags; |
563 | if (!(flgs & IFF_UP)) | |
564 | continue; | |
565 | ||
8c979c26 PM |
566 | vlan_sync_address(dev, vlandev); |
567 | } | |
568 | break; | |
569 | ||
1da177e4 LT |
570 | case NETDEV_DOWN: |
571 | /* Put all VLANs for this dev in the down state too. */ | |
572 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 573 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
574 | if (!vlandev) |
575 | continue; | |
576 | ||
577 | flgs = vlandev->flags; | |
578 | if (!(flgs & IFF_UP)) | |
579 | continue; | |
580 | ||
581 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
582 | } | |
583 | break; | |
584 | ||
585 | case NETDEV_UP: | |
586 | /* Put all VLANs for this dev in the up state too. */ | |
587 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 588 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
589 | if (!vlandev) |
590 | continue; | |
122952fc | 591 | |
1da177e4 LT |
592 | flgs = vlandev->flags; |
593 | if (flgs & IFF_UP) | |
594 | continue; | |
595 | ||
596 | dev_change_flags(vlandev, flgs | IFF_UP); | |
597 | } | |
598 | break; | |
122952fc | 599 | |
1da177e4 LT |
600 | case NETDEV_UNREGISTER: |
601 | /* Delete all VLANs for this dev. */ | |
602 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
603 | int ret; | |
604 | ||
5c15bdec | 605 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
606 | if (!vlandev) |
607 | continue; | |
608 | ||
609 | ret = unregister_vlan_dev(dev, | |
610 | VLAN_DEV_INFO(vlandev)->vlan_id); | |
611 | ||
612 | unregister_netdevice(vlandev); | |
613 | ||
614 | /* Group was destroyed? */ | |
615 | if (ret == 1) | |
616 | break; | |
617 | } | |
618 | break; | |
3ff50b79 | 619 | } |
1da177e4 LT |
620 | |
621 | out: | |
622 | return NOTIFY_DONE; | |
623 | } | |
624 | ||
625 | /* | |
626 | * VLAN IOCTL handler. | |
627 | * o execute requested action or pass command to the device driver | |
628 | * arg is really a struct vlan_ioctl_args __user *. | |
629 | */ | |
881d966b | 630 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 631 | { |
c17d8874 | 632 | int err; |
1da177e4 LT |
633 | unsigned short vid = 0; |
634 | struct vlan_ioctl_args args; | |
c17d8874 | 635 | struct net_device *dev = NULL; |
1da177e4 LT |
636 | |
637 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
638 | return -EFAULT; | |
639 | ||
640 | /* Null terminate this sucker, just in case. */ | |
641 | args.device1[23] = 0; | |
642 | args.u.device2[23] = 0; | |
643 | ||
644 | #ifdef VLAN_DEBUG | |
645 | printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); | |
646 | #endif | |
647 | ||
c17d8874 PM |
648 | rtnl_lock(); |
649 | ||
1da177e4 LT |
650 | switch (args.cmd) { |
651 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
652 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
653 | case SET_VLAN_FLAG_CMD: | |
654 | case ADD_VLAN_CMD: | |
655 | case DEL_VLAN_CMD: | |
656 | case GET_VLAN_REALDEV_NAME_CMD: | |
657 | case GET_VLAN_VID_CMD: | |
658 | err = -ENODEV; | |
881d966b | 659 | dev = __dev_get_by_name(&init_net, args.device1); |
c17d8874 PM |
660 | if (!dev) |
661 | goto out; | |
662 | ||
663 | err = -EINVAL; | |
664 | if (args.cmd != ADD_VLAN_CMD && | |
665 | !(dev->priv_flags & IFF_802_1Q_VLAN)) | |
666 | goto out; | |
667 | } | |
668 | ||
669 | switch (args.cmd) { | |
670 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
671 | err = -EPERM; | |
1da177e4 | 672 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
673 | break; |
674 | vlan_dev_set_ingress_priority(dev, | |
675 | args.u.skb_priority, | |
676 | args.vlan_qos); | |
fffe470a | 677 | err = 0; |
1da177e4 LT |
678 | break; |
679 | ||
680 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 681 | err = -EPERM; |
1da177e4 | 682 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
683 | break; |
684 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
685 | args.u.skb_priority, |
686 | args.vlan_qos); | |
687 | break; | |
688 | ||
689 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 690 | err = -EPERM; |
1da177e4 | 691 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
692 | break; |
693 | err = vlan_dev_set_vlan_flag(dev, | |
1da177e4 LT |
694 | args.u.flag, |
695 | args.vlan_qos); | |
696 | break; | |
697 | ||
698 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 699 | err = -EPERM; |
1da177e4 | 700 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 701 | break; |
c17d8874 PM |
702 | if ((args.u.name_type >= 0) && |
703 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
1da177e4 LT |
704 | vlan_name_type = args.u.name_type; |
705 | err = 0; | |
706 | } else { | |
707 | err = -EINVAL; | |
708 | } | |
709 | break; | |
710 | ||
711 | case ADD_VLAN_CMD: | |
c17d8874 | 712 | err = -EPERM; |
1da177e4 | 713 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 714 | break; |
2ae0bf69 | 715 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
716 | break; |
717 | ||
718 | case DEL_VLAN_CMD: | |
c17d8874 | 719 | err = -EPERM; |
1da177e4 | 720 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
721 | break; |
722 | err = unregister_vlan_device(dev); | |
1da177e4 LT |
723 | break; |
724 | ||
725 | case GET_VLAN_INGRESS_PRIORITY_CMD: | |
726 | /* TODO: Implement | |
727 | err = vlan_dev_get_ingress_priority(args); | |
728 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
729 | sizeof(struct vlan_ioctl_args))) { |
730 | err = -EFAULT; | |
1da177e4 LT |
731 | } |
732 | */ | |
733 | err = -EINVAL; | |
734 | break; | |
735 | case GET_VLAN_EGRESS_PRIORITY_CMD: | |
736 | /* TODO: Implement | |
737 | err = vlan_dev_get_egress_priority(args.device1, &(args.args); | |
738 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
739 | sizeof(struct vlan_ioctl_args))) { |
740 | err = -EFAULT; | |
1da177e4 LT |
741 | } |
742 | */ | |
743 | err = -EINVAL; | |
744 | break; | |
745 | case GET_VLAN_REALDEV_NAME_CMD: | |
3f5f4346 | 746 | err = 0; |
c17d8874 | 747 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 LT |
748 | if (copy_to_user(arg, &args, |
749 | sizeof(struct vlan_ioctl_args))) { | |
750 | err = -EFAULT; | |
751 | } | |
752 | break; | |
753 | ||
754 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 755 | err = 0; |
c17d8874 | 756 | vlan_dev_get_vid(dev, &vid); |
1da177e4 LT |
757 | args.u.VID = vid; |
758 | if (copy_to_user(arg, &args, | |
759 | sizeof(struct vlan_ioctl_args))) { | |
122952fc | 760 | err = -EFAULT; |
1da177e4 LT |
761 | } |
762 | break; | |
763 | ||
764 | default: | |
765 | /* pass on to underlying device instead?? */ | |
766 | printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", | |
767 | __FUNCTION__, args.cmd); | |
c17d8874 PM |
768 | err = -EINVAL; |
769 | break; | |
3ff50b79 | 770 | } |
7eb1b3d3 | 771 | out: |
c17d8874 | 772 | rtnl_unlock(); |
1da177e4 LT |
773 | return err; |
774 | } | |
775 | ||
776 | MODULE_LICENSE("GPL"); | |
777 | MODULE_VERSION(DRV_VERSION); |