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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 *); | |
54 | static int vlan_ioctl_handler(void __user *); | |
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 |
1da177e4 LT |
92 | "%s %s: can't create entry in proc filesystem!\n", |
93 | __FUNCTION__, VLAN_NAME); | |
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 | ||
07b5b17e | 127 | vlan_netlink_fini(); |
1da177e4 LT |
128 | vlan_ioctl_set(NULL); |
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 | ||
2f4284a4 PM |
310 | /* |
311 | * vlan network devices have devices nesting below it, and are a special | |
312 | * "super class" of normal network devices; split their locks off into a | |
313 | * separate class since they always nest. | |
314 | */ | |
315 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
316 | ||
317 | static int vlan_dev_init(struct net_device *dev) | |
318 | { | |
319 | struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; | |
320 | ||
321 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ | |
322 | dev->flags = real_dev->flags & ~IFF_UP; | |
323 | dev->iflink = real_dev->ifindex; | |
324 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
325 | (1<<__LINK_STATE_DORMANT))) | | |
326 | (1<<__LINK_STATE_PRESENT); | |
327 | ||
0e06877c PM |
328 | if (is_zero_ether_addr(dev->dev_addr)) |
329 | memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); | |
330 | if (is_zero_ether_addr(dev->broadcast)) | |
331 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
2f4284a4 PM |
332 | |
333 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { | |
334 | dev->hard_header = real_dev->hard_header; | |
335 | dev->hard_header_len = real_dev->hard_header_len; | |
336 | dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; | |
337 | dev->rebuild_header = real_dev->rebuild_header; | |
338 | } else { | |
339 | dev->hard_header = vlan_dev_hard_header; | |
340 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
341 | dev->hard_start_xmit = vlan_dev_hard_start_xmit; | |
342 | dev->rebuild_header = vlan_dev_rebuild_header; | |
343 | } | |
344 | dev->hard_header_parse = real_dev->hard_header_parse; | |
8c979c26 | 345 | dev->hard_header_cache = NULL; |
2f4284a4 PM |
346 | |
347 | lockdep_set_class(&dev->_xmit_lock, &vlan_netdev_xmit_lock_key); | |
348 | return 0; | |
349 | } | |
350 | ||
07b5b17e | 351 | void vlan_setup(struct net_device *new_dev) |
1da177e4 LT |
352 | { |
353 | SET_MODULE_OWNER(new_dev); | |
122952fc | 354 | |
8c979c26 PM |
355 | ether_setup(new_dev); |
356 | ||
1da177e4 LT |
357 | /* new_dev->ifindex = 0; it will be set when added to |
358 | * the global list. | |
359 | * iflink is set as well. | |
360 | */ | |
361 | new_dev->get_stats = vlan_dev_get_stats; | |
362 | ||
363 | /* Make this thing known as a VLAN device */ | |
364 | new_dev->priv_flags |= IFF_802_1Q_VLAN; | |
122952fc | 365 | |
1da177e4 LT |
366 | /* Set us up to have no queue, as the underlying Hardware device |
367 | * can do all the queueing we could want. | |
368 | */ | |
369 | new_dev->tx_queue_len = 0; | |
370 | ||
371 | /* set up method calls */ | |
372 | new_dev->change_mtu = vlan_dev_change_mtu; | |
2f4284a4 | 373 | new_dev->init = vlan_dev_init; |
1da177e4 LT |
374 | new_dev->open = vlan_dev_open; |
375 | new_dev->stop = vlan_dev_stop; | |
1da177e4 | 376 | new_dev->set_multicast_list = vlan_dev_set_multicast_list; |
6c78dcbd | 377 | new_dev->change_rx_flags = vlan_change_rx_flags; |
1da177e4 LT |
378 | new_dev->destructor = free_netdev; |
379 | new_dev->do_ioctl = vlan_dev_ioctl; | |
0e06877c | 380 | |
a7ecfc86 | 381 | memset(new_dev->broadcast, 0, ETH_ALEN); |
1da177e4 LT |
382 | } |
383 | ||
ddd7bf9f SR |
384 | static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) |
385 | { | |
386 | /* Have to respect userspace enforced dormant state | |
387 | * of real device, also must allow supplicant running | |
388 | * on VLAN device | |
389 | */ | |
390 | if (dev->operstate == IF_OPER_DORMANT) | |
391 | netif_dormant_on(vlandev); | |
392 | else | |
393 | netif_dormant_off(vlandev); | |
394 | ||
395 | if (netif_carrier_ok(dev)) { | |
396 | if (!netif_carrier_ok(vlandev)) | |
397 | netif_carrier_on(vlandev); | |
398 | } else { | |
399 | if (netif_carrier_ok(vlandev)) | |
400 | netif_carrier_off(vlandev); | |
401 | } | |
402 | } | |
403 | ||
07b5b17e | 404 | int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id) |
1da177e4 | 405 | { |
1da177e4 LT |
406 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
407 | printk(VLAN_DBG "%s: VLANs not supported on %s.\n", | |
408 | __FUNCTION__, real_dev->name); | |
c1d3ee99 | 409 | return -EOPNOTSUPP; |
1da177e4 LT |
410 | } |
411 | ||
412 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && | |
d2d1acdb | 413 | !real_dev->vlan_rx_register) { |
1da177e4 LT |
414 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", |
415 | __FUNCTION__, real_dev->name); | |
c1d3ee99 | 416 | return -EOPNOTSUPP; |
1da177e4 LT |
417 | } |
418 | ||
419 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
d2d1acdb | 420 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
1da177e4 LT |
421 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", |
422 | __FUNCTION__, real_dev->name); | |
c1d3ee99 | 423 | return -EOPNOTSUPP; |
1da177e4 LT |
424 | } |
425 | ||
1da177e4 LT |
426 | /* The real device must be up and operating in order to |
427 | * assosciate a VLAN device with it. | |
428 | */ | |
429 | if (!(real_dev->flags & IFF_UP)) | |
c1d3ee99 | 430 | return -ENETDOWN; |
1da177e4 | 431 | |
c1d3ee99 | 432 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) { |
1da177e4 LT |
433 | /* was already registered. */ |
434 | printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); | |
c1d3ee99 | 435 | return -EEXIST; |
1da177e4 LT |
436 | } |
437 | ||
c1d3ee99 PM |
438 | return 0; |
439 | } | |
440 | ||
07b5b17e | 441 | int register_vlan_dev(struct net_device *dev) |
e89fe42c PM |
442 | { |
443 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); | |
444 | struct net_device *real_dev = vlan->real_dev; | |
445 | unsigned short vlan_id = vlan->vlan_id; | |
446 | struct vlan_group *grp, *ngrp = NULL; | |
447 | int err; | |
448 | ||
449 | grp = __vlan_find_group(real_dev->ifindex); | |
450 | if (!grp) { | |
451 | ngrp = grp = vlan_group_alloc(real_dev->ifindex); | |
452 | if (!grp) | |
453 | return -ENOBUFS; | |
454 | } | |
455 | ||
456 | err = register_netdevice(dev); | |
457 | if (err < 0) | |
458 | goto out_free_group; | |
459 | ||
460 | /* Account for reference in struct vlan_dev_info */ | |
461 | dev_hold(real_dev); | |
462 | ||
463 | vlan_transfer_operstate(real_dev, dev); | |
464 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
465 | ||
466 | /* So, got the sucker initialized, now lets place | |
467 | * it into our local structure. | |
468 | */ | |
469 | vlan_group_set_device(grp, vlan_id, dev); | |
470 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) | |
471 | real_dev->vlan_rx_register(real_dev, ngrp); | |
472 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
473 | real_dev->vlan_rx_add_vid(real_dev, vlan_id); | |
474 | ||
475 | if (vlan_proc_add_dev(dev) < 0) | |
476 | printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", | |
477 | dev->name); | |
478 | return 0; | |
479 | ||
480 | out_free_group: | |
481 | if (ngrp) | |
482 | vlan_group_free(ngrp); | |
483 | return err; | |
484 | } | |
485 | ||
c1d3ee99 | 486 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 487 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 488 | */ |
2ae0bf69 PM |
489 | static int register_vlan_device(struct net_device *real_dev, |
490 | unsigned short VLAN_ID) | |
c1d3ee99 | 491 | { |
c1d3ee99 PM |
492 | struct net_device *new_dev; |
493 | char name[IFNAMSIZ]; | |
2ae0bf69 | 494 | int err; |
c1d3ee99 PM |
495 | |
496 | #ifdef VLAN_DEBUG | |
497 | printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", | |
498 | __FUNCTION__, eth_IF_name, VLAN_ID); | |
499 | #endif | |
500 | ||
501 | if (VLAN_ID >= VLAN_VID_MASK) | |
2ae0bf69 | 502 | return -ERANGE; |
c1d3ee99 | 503 | |
2ae0bf69 PM |
504 | err = vlan_check_real_dev(real_dev, VLAN_ID); |
505 | if (err < 0) | |
506 | return err; | |
c1d3ee99 | 507 | |
1da177e4 LT |
508 | /* Gotta set up the fields for the device. */ |
509 | #ifdef VLAN_DEBUG | |
510 | printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", | |
511 | vlan_name_type); | |
512 | #endif | |
513 | switch (vlan_name_type) { | |
514 | case VLAN_NAME_TYPE_RAW_PLUS_VID: | |
515 | /* name will look like: eth1.0005 */ | |
516 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); | |
517 | break; | |
518 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
519 | /* Put our vlan.VID in the name. | |
520 | * Name will look like: vlan5 | |
521 | */ | |
522 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); | |
523 | break; | |
524 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
525 | /* Put our vlan.VID in the name. | |
526 | * Name will look like: eth0.5 | |
527 | */ | |
528 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); | |
529 | break; | |
530 | case VLAN_NAME_TYPE_PLUS_VID: | |
531 | /* Put our vlan.VID in the name. | |
532 | * Name will look like: vlan0005 | |
533 | */ | |
534 | default: | |
535 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); | |
3ff50b79 | 536 | } |
122952fc | 537 | |
1da177e4 LT |
538 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
539 | vlan_setup); | |
5dd8d1e9 | 540 | |
1da177e4 | 541 | if (new_dev == NULL) |
2ae0bf69 | 542 | return -ENOBUFS; |
1da177e4 | 543 | |
1da177e4 LT |
544 | /* need 4 bytes for extra VLAN header info, |
545 | * hope the underlying device can handle it. | |
546 | */ | |
547 | new_dev->mtu = real_dev->mtu; | |
548 | ||
2f4284a4 PM |
549 | #ifdef VLAN_DEBUG |
550 | printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); | |
1da177e4 LT |
551 | VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", |
552 | new_dev->priv, | |
553 | sizeof(struct vlan_dev_info)); | |
2f4284a4 | 554 | #endif |
1da177e4 LT |
555 | |
556 | VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ | |
557 | VLAN_DEV_INFO(new_dev)->real_dev = real_dev; | |
558 | VLAN_DEV_INFO(new_dev)->dent = NULL; | |
a4bf3af4 | 559 | VLAN_DEV_INFO(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
1da177e4 | 560 | |
07b5b17e | 561 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
562 | err = register_vlan_dev(new_dev); |
563 | if (err < 0) | |
e89fe42c | 564 | goto out_free_newdev; |
1da177e4 | 565 | |
1da177e4 LT |
566 | #ifdef VLAN_DEBUG |
567 | printk(VLAN_DBG "Allocated new device successfully, returning.\n"); | |
568 | #endif | |
2ae0bf69 | 569 | return 0; |
1da177e4 | 570 | |
1da177e4 LT |
571 | out_free_newdev: |
572 | free_netdev(new_dev); | |
2ae0bf69 | 573 | return err; |
1da177e4 LT |
574 | } |
575 | ||
8c979c26 PM |
576 | static void vlan_sync_address(struct net_device *dev, |
577 | struct net_device *vlandev) | |
578 | { | |
579 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(vlandev); | |
580 | ||
581 | /* May be called without an actual change */ | |
582 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
583 | return; | |
584 | ||
585 | /* vlan address was different from the old address and is equal to | |
586 | * the new address */ | |
587 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
588 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
589 | dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); | |
590 | ||
591 | /* vlan address was equal to the old address and is different from | |
592 | * the new address */ | |
593 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
594 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
595 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); | |
596 | ||
597 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
598 | } | |
599 | ||
1da177e4 LT |
600 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) |
601 | { | |
602 | struct net_device *dev = ptr; | |
603 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); | |
604 | int i, flgs; | |
605 | struct net_device *vlandev; | |
606 | ||
e9dc8653 EB |
607 | if (dev->nd_net != &init_net) |
608 | return NOTIFY_DONE; | |
609 | ||
1da177e4 LT |
610 | if (!grp) |
611 | goto out; | |
612 | ||
613 | /* It is OK that we do not hold the group lock right now, | |
614 | * as we run under the RTNL lock. | |
615 | */ | |
616 | ||
617 | switch (event) { | |
618 | case NETDEV_CHANGE: | |
619 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 620 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 621 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
622 | if (!vlandev) |
623 | continue; | |
624 | ||
ddd7bf9f | 625 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
626 | } |
627 | break; | |
628 | ||
8c979c26 PM |
629 | case NETDEV_CHANGEADDR: |
630 | /* Adjust unicast filters on underlying device */ | |
631 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
632 | vlandev = vlan_group_get_device(grp, i); | |
633 | if (!vlandev) | |
634 | continue; | |
635 | ||
636 | vlan_sync_address(dev, vlandev); | |
637 | } | |
638 | break; | |
639 | ||
1da177e4 LT |
640 | case NETDEV_DOWN: |
641 | /* Put all VLANs for this dev in the down state too. */ | |
642 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 643 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
644 | if (!vlandev) |
645 | continue; | |
646 | ||
647 | flgs = vlandev->flags; | |
648 | if (!(flgs & IFF_UP)) | |
649 | continue; | |
650 | ||
651 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
652 | } | |
653 | break; | |
654 | ||
655 | case NETDEV_UP: | |
656 | /* Put all VLANs for this dev in the up state too. */ | |
657 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 658 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
659 | if (!vlandev) |
660 | continue; | |
122952fc | 661 | |
1da177e4 LT |
662 | flgs = vlandev->flags; |
663 | if (flgs & IFF_UP) | |
664 | continue; | |
665 | ||
666 | dev_change_flags(vlandev, flgs | IFF_UP); | |
667 | } | |
668 | break; | |
122952fc | 669 | |
1da177e4 LT |
670 | case NETDEV_UNREGISTER: |
671 | /* Delete all VLANs for this dev. */ | |
672 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
673 | int ret; | |
674 | ||
5c15bdec | 675 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
676 | if (!vlandev) |
677 | continue; | |
678 | ||
679 | ret = unregister_vlan_dev(dev, | |
680 | VLAN_DEV_INFO(vlandev)->vlan_id); | |
681 | ||
682 | unregister_netdevice(vlandev); | |
683 | ||
684 | /* Group was destroyed? */ | |
685 | if (ret == 1) | |
686 | break; | |
687 | } | |
688 | break; | |
3ff50b79 | 689 | } |
1da177e4 LT |
690 | |
691 | out: | |
692 | return NOTIFY_DONE; | |
693 | } | |
694 | ||
695 | /* | |
696 | * VLAN IOCTL handler. | |
697 | * o execute requested action or pass command to the device driver | |
698 | * arg is really a struct vlan_ioctl_args __user *. | |
699 | */ | |
700 | static int vlan_ioctl_handler(void __user *arg) | |
701 | { | |
c17d8874 | 702 | int err; |
1da177e4 LT |
703 | unsigned short vid = 0; |
704 | struct vlan_ioctl_args args; | |
c17d8874 | 705 | struct net_device *dev = NULL; |
1da177e4 LT |
706 | |
707 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
708 | return -EFAULT; | |
709 | ||
710 | /* Null terminate this sucker, just in case. */ | |
711 | args.device1[23] = 0; | |
712 | args.u.device2[23] = 0; | |
713 | ||
714 | #ifdef VLAN_DEBUG | |
715 | printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); | |
716 | #endif | |
717 | ||
c17d8874 PM |
718 | rtnl_lock(); |
719 | ||
1da177e4 LT |
720 | switch (args.cmd) { |
721 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
722 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
723 | case SET_VLAN_FLAG_CMD: | |
724 | case ADD_VLAN_CMD: | |
725 | case DEL_VLAN_CMD: | |
726 | case GET_VLAN_REALDEV_NAME_CMD: | |
727 | case GET_VLAN_VID_CMD: | |
728 | err = -ENODEV; | |
729 | dev = __dev_get_by_name(args.device1); | |
730 | if (!dev) | |
731 | goto out; | |
732 | ||
733 | err = -EINVAL; | |
734 | if (args.cmd != ADD_VLAN_CMD && | |
735 | !(dev->priv_flags & IFF_802_1Q_VLAN)) | |
736 | goto out; | |
737 | } | |
738 | ||
739 | switch (args.cmd) { | |
740 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
741 | err = -EPERM; | |
1da177e4 | 742 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
743 | break; |
744 | vlan_dev_set_ingress_priority(dev, | |
745 | args.u.skb_priority, | |
746 | args.vlan_qos); | |
1da177e4 LT |
747 | break; |
748 | ||
749 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 750 | err = -EPERM; |
1da177e4 | 751 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
752 | break; |
753 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
754 | args.u.skb_priority, |
755 | args.vlan_qos); | |
756 | break; | |
757 | ||
758 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 759 | err = -EPERM; |
1da177e4 | 760 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
761 | break; |
762 | err = vlan_dev_set_vlan_flag(dev, | |
1da177e4 LT |
763 | args.u.flag, |
764 | args.vlan_qos); | |
765 | break; | |
766 | ||
767 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 768 | err = -EPERM; |
1da177e4 LT |
769 | if (!capable(CAP_NET_ADMIN)) |
770 | return -EPERM; | |
c17d8874 PM |
771 | if ((args.u.name_type >= 0) && |
772 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
1da177e4 LT |
773 | vlan_name_type = args.u.name_type; |
774 | err = 0; | |
775 | } else { | |
776 | err = -EINVAL; | |
777 | } | |
778 | break; | |
779 | ||
780 | case ADD_VLAN_CMD: | |
c17d8874 | 781 | err = -EPERM; |
1da177e4 | 782 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 783 | break; |
2ae0bf69 | 784 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
785 | break; |
786 | ||
787 | case DEL_VLAN_CMD: | |
c17d8874 | 788 | err = -EPERM; |
1da177e4 | 789 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
790 | break; |
791 | err = unregister_vlan_device(dev); | |
1da177e4 LT |
792 | break; |
793 | ||
794 | case GET_VLAN_INGRESS_PRIORITY_CMD: | |
795 | /* TODO: Implement | |
796 | err = vlan_dev_get_ingress_priority(args); | |
797 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
798 | sizeof(struct vlan_ioctl_args))) { |
799 | err = -EFAULT; | |
1da177e4 LT |
800 | } |
801 | */ | |
802 | err = -EINVAL; | |
803 | break; | |
804 | case GET_VLAN_EGRESS_PRIORITY_CMD: | |
805 | /* TODO: Implement | |
806 | err = vlan_dev_get_egress_priority(args.device1, &(args.args); | |
807 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
808 | sizeof(struct vlan_ioctl_args))) { |
809 | err = -EFAULT; | |
1da177e4 LT |
810 | } |
811 | */ | |
812 | err = -EINVAL; | |
813 | break; | |
814 | case GET_VLAN_REALDEV_NAME_CMD: | |
3f5f4346 | 815 | err = 0; |
c17d8874 | 816 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 LT |
817 | if (copy_to_user(arg, &args, |
818 | sizeof(struct vlan_ioctl_args))) { | |
819 | err = -EFAULT; | |
820 | } | |
821 | break; | |
822 | ||
823 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 824 | err = 0; |
c17d8874 | 825 | vlan_dev_get_vid(dev, &vid); |
1da177e4 LT |
826 | args.u.VID = vid; |
827 | if (copy_to_user(arg, &args, | |
828 | sizeof(struct vlan_ioctl_args))) { | |
122952fc | 829 | err = -EFAULT; |
1da177e4 LT |
830 | } |
831 | break; | |
832 | ||
833 | default: | |
834 | /* pass on to underlying device instead?? */ | |
835 | printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", | |
836 | __FUNCTION__, args.cmd); | |
c17d8874 PM |
837 | err = -EINVAL; |
838 | break; | |
3ff50b79 | 839 | } |
7eb1b3d3 | 840 | out: |
c17d8874 | 841 | rtnl_unlock(); |
1da177e4 LT |
842 | return err; |
843 | } | |
844 | ||
845 | MODULE_LICENSE("GPL"); | |
846 | MODULE_VERSION(DRV_VERSION); |