Commit | Line | Data |
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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); | |
100 | if (err < 0) { | |
101 | dev_remove_pack(&vlan_packet_type); | |
102 | vlan_proc_cleanup(); | |
103 | return err; | |
104 | } | |
105 | ||
106 | vlan_ioctl_set(vlan_ioctl_handler); | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
122952fc | 111 | /* Cleanup all vlan devices |
1da177e4 LT |
112 | * Note: devices that have been registered that but not |
113 | * brought up will exist but have no module ref count. | |
114 | */ | |
115 | static void __exit vlan_cleanup_devices(void) | |
116 | { | |
117 | struct net_device *dev, *nxt; | |
118 | ||
119 | rtnl_lock(); | |
7562f876 | 120 | for_each_netdev_safe(dev, nxt) { |
1da177e4 LT |
121 | if (dev->priv_flags & IFF_802_1Q_VLAN) { |
122 | unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, | |
123 | VLAN_DEV_INFO(dev)->vlan_id); | |
124 | ||
125 | unregister_netdevice(dev); | |
126 | } | |
127 | } | |
128 | rtnl_unlock(); | |
129 | } | |
130 | ||
131 | /* | |
132 | * Module 'remove' entry point. | |
133 | * o delete /proc/net/router directory and static entries. | |
122952fc | 134 | */ |
1da177e4 LT |
135 | static void __exit vlan_cleanup_module(void) |
136 | { | |
137 | int i; | |
138 | ||
139 | vlan_ioctl_set(NULL); | |
140 | ||
141 | /* Un-register us from receiving netdevice events */ | |
142 | unregister_netdevice_notifier(&vlan_notifier_block); | |
143 | ||
144 | dev_remove_pack(&vlan_packet_type); | |
145 | vlan_cleanup_devices(); | |
146 | ||
147 | /* This table must be empty if there are no module | |
148 | * references left. | |
149 | */ | |
150 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) { | |
151 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
152 | } | |
153 | vlan_proc_cleanup(); | |
154 | ||
155 | synchronize_net(); | |
156 | } | |
157 | ||
158 | module_init(vlan_proto_init); | |
159 | module_exit(vlan_cleanup_module); | |
160 | ||
161 | /* Must be invoked with RCU read lock (no preempt) */ | |
162 | static struct vlan_group *__vlan_find_group(int real_dev_ifindex) | |
163 | { | |
164 | struct vlan_group *grp; | |
165 | struct hlist_node *n; | |
166 | int hash = vlan_grp_hashfn(real_dev_ifindex); | |
167 | ||
168 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { | |
169 | if (grp->real_dev_ifindex == real_dev_ifindex) | |
170 | return grp; | |
171 | } | |
172 | ||
173 | return NULL; | |
174 | } | |
175 | ||
176 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. | |
177 | * | |
178 | * Must be invoked with RCU read lock (no preempt) | |
179 | */ | |
180 | struct net_device *__find_vlan_dev(struct net_device *real_dev, | |
181 | unsigned short VID) | |
182 | { | |
183 | struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); | |
184 | ||
185 | if (grp) | |
5c15bdec | 186 | return vlan_group_get_device(grp, VID); |
1da177e4 LT |
187 | |
188 | return NULL; | |
189 | } | |
190 | ||
5c15bdec DA |
191 | static void vlan_group_free(struct vlan_group *grp) |
192 | { | |
193 | int i; | |
194 | ||
195 | for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) | |
196 | kfree(grp->vlan_devices_arrays[i]); | |
197 | kfree(grp); | |
198 | } | |
199 | ||
1da177e4 LT |
200 | static void vlan_rcu_free(struct rcu_head *rcu) |
201 | { | |
5c15bdec | 202 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
203 | } |
204 | ||
205 | ||
206 | /* This returns 0 if everything went fine. | |
207 | * It will return 1 if the group was killed as a result. | |
208 | * A negative return indicates failure. | |
209 | * | |
210 | * The RTNL lock must be held. | |
211 | */ | |
212 | static int unregister_vlan_dev(struct net_device *real_dev, | |
213 | unsigned short vlan_id) | |
214 | { | |
215 | struct net_device *dev = NULL; | |
216 | int real_dev_ifindex = real_dev->ifindex; | |
217 | struct vlan_group *grp; | |
218 | int i, ret; | |
219 | ||
220 | #ifdef VLAN_DEBUG | |
221 | printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id); | |
222 | #endif | |
223 | ||
224 | /* sanity check */ | |
225 | if (vlan_id >= VLAN_VID_MASK) | |
226 | return -EINVAL; | |
227 | ||
228 | ASSERT_RTNL(); | |
229 | grp = __vlan_find_group(real_dev_ifindex); | |
230 | ||
231 | ret = 0; | |
232 | ||
233 | if (grp) { | |
5c15bdec | 234 | dev = vlan_group_get_device(grp, vlan_id); |
1da177e4 LT |
235 | if (dev) { |
236 | /* Remove proc entry */ | |
237 | vlan_proc_rem_dev(dev); | |
238 | ||
239 | /* Take it out of our own structures, but be sure to | |
240 | * interlock with HW accelerating devices or SW vlan | |
241 | * input packet processing. | |
242 | */ | |
d2d1acdb | 243 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
1da177e4 | 244 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 245 | |
5c15bdec | 246 | vlan_group_set_device(grp, vlan_id, NULL); |
1da177e4 LT |
247 | synchronize_net(); |
248 | ||
249 | ||
250 | /* Caller unregisters (and if necessary, puts) | |
251 | * VLAN device, but we get rid of the reference to | |
252 | * real_dev here. | |
253 | */ | |
254 | dev_put(real_dev); | |
255 | ||
256 | /* If the group is now empty, kill off the | |
257 | * group. | |
258 | */ | |
259 | for (i = 0; i < VLAN_VID_MASK; i++) | |
5c15bdec | 260 | if (vlan_group_get_device(grp, i)) |
1da177e4 LT |
261 | break; |
262 | ||
263 | if (i == VLAN_VID_MASK) { | |
264 | if (real_dev->features & NETIF_F_HW_VLAN_RX) | |
265 | real_dev->vlan_rx_register(real_dev, NULL); | |
266 | ||
267 | hlist_del_rcu(&grp->hlist); | |
268 | ||
269 | /* Free the group, after all cpu's are done. */ | |
270 | call_rcu(&grp->rcu, vlan_rcu_free); | |
271 | ||
272 | grp = NULL; | |
273 | ret = 1; | |
274 | } | |
275 | } | |
276 | } | |
277 | ||
122952fc | 278 | return ret; |
1da177e4 LT |
279 | } |
280 | ||
c17d8874 | 281 | static int unregister_vlan_device(struct net_device *dev) |
1da177e4 | 282 | { |
1da177e4 LT |
283 | int ret; |
284 | ||
c17d8874 PM |
285 | ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, |
286 | VLAN_DEV_INFO(dev)->vlan_id); | |
287 | unregister_netdevice(dev); | |
1da177e4 | 288 | |
c17d8874 PM |
289 | if (ret == 1) |
290 | ret = 0; | |
1da177e4 LT |
291 | return ret; |
292 | } | |
293 | ||
2f4284a4 PM |
294 | /* |
295 | * vlan network devices have devices nesting below it, and are a special | |
296 | * "super class" of normal network devices; split their locks off into a | |
297 | * separate class since they always nest. | |
298 | */ | |
299 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
300 | ||
301 | static int vlan_dev_init(struct net_device *dev) | |
302 | { | |
303 | struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; | |
304 | ||
305 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ | |
306 | dev->flags = real_dev->flags & ~IFF_UP; | |
307 | dev->iflink = real_dev->ifindex; | |
308 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
309 | (1<<__LINK_STATE_DORMANT))) | | |
310 | (1<<__LINK_STATE_PRESENT); | |
311 | ||
312 | /* TODO: maybe just assign it to be ETHERNET? */ | |
313 | dev->type = real_dev->type; | |
314 | ||
315 | memcpy(dev->broadcast, real_dev->broadcast, real_dev->addr_len); | |
316 | memcpy(dev->dev_addr, real_dev->dev_addr, real_dev->addr_len); | |
317 | dev->addr_len = real_dev->addr_len; | |
318 | ||
319 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { | |
320 | dev->hard_header = real_dev->hard_header; | |
321 | dev->hard_header_len = real_dev->hard_header_len; | |
322 | dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; | |
323 | dev->rebuild_header = real_dev->rebuild_header; | |
324 | } else { | |
325 | dev->hard_header = vlan_dev_hard_header; | |
326 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
327 | dev->hard_start_xmit = vlan_dev_hard_start_xmit; | |
328 | dev->rebuild_header = vlan_dev_rebuild_header; | |
329 | } | |
330 | dev->hard_header_parse = real_dev->hard_header_parse; | |
331 | ||
332 | lockdep_set_class(&dev->_xmit_lock, &vlan_netdev_xmit_lock_key); | |
333 | return 0; | |
334 | } | |
335 | ||
1da177e4 LT |
336 | static void vlan_setup(struct net_device *new_dev) |
337 | { | |
338 | SET_MODULE_OWNER(new_dev); | |
122952fc | 339 | |
1da177e4 LT |
340 | /* new_dev->ifindex = 0; it will be set when added to |
341 | * the global list. | |
342 | * iflink is set as well. | |
343 | */ | |
344 | new_dev->get_stats = vlan_dev_get_stats; | |
345 | ||
346 | /* Make this thing known as a VLAN device */ | |
347 | new_dev->priv_flags |= IFF_802_1Q_VLAN; | |
122952fc | 348 | |
1da177e4 LT |
349 | /* Set us up to have no queue, as the underlying Hardware device |
350 | * can do all the queueing we could want. | |
351 | */ | |
352 | new_dev->tx_queue_len = 0; | |
353 | ||
354 | /* set up method calls */ | |
355 | new_dev->change_mtu = vlan_dev_change_mtu; | |
2f4284a4 | 356 | new_dev->init = vlan_dev_init; |
1da177e4 LT |
357 | new_dev->open = vlan_dev_open; |
358 | new_dev->stop = vlan_dev_stop; | |
359 | new_dev->set_mac_address = vlan_dev_set_mac_address; | |
360 | new_dev->set_multicast_list = vlan_dev_set_multicast_list; | |
361 | new_dev->destructor = free_netdev; | |
362 | new_dev->do_ioctl = vlan_dev_ioctl; | |
363 | } | |
364 | ||
ddd7bf9f SR |
365 | static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) |
366 | { | |
367 | /* Have to respect userspace enforced dormant state | |
368 | * of real device, also must allow supplicant running | |
369 | * on VLAN device | |
370 | */ | |
371 | if (dev->operstate == IF_OPER_DORMANT) | |
372 | netif_dormant_on(vlandev); | |
373 | else | |
374 | netif_dormant_off(vlandev); | |
375 | ||
376 | if (netif_carrier_ok(dev)) { | |
377 | if (!netif_carrier_ok(vlandev)) | |
378 | netif_carrier_on(vlandev); | |
379 | } else { | |
380 | if (netif_carrier_ok(vlandev)) | |
381 | netif_carrier_off(vlandev); | |
382 | } | |
383 | } | |
384 | ||
1da177e4 LT |
385 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
386 | * Returns the device that was created, or NULL if there was | |
387 | * an error of some kind. | |
388 | */ | |
c17d8874 | 389 | static struct net_device *register_vlan_device(struct net_device *real_dev, |
1da177e4 LT |
390 | unsigned short VLAN_ID) |
391 | { | |
392 | struct vlan_group *grp; | |
393 | struct net_device *new_dev; | |
1da177e4 | 394 | char name[IFNAMSIZ]; |
5c15bdec | 395 | int i; |
1da177e4 LT |
396 | |
397 | #ifdef VLAN_DEBUG | |
398 | printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", | |
399 | __FUNCTION__, eth_IF_name, VLAN_ID); | |
400 | #endif | |
401 | ||
402 | if (VLAN_ID >= VLAN_VID_MASK) | |
403 | goto out_ret_null; | |
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); | |
c17d8874 | 408 | goto out_ret_null; |
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); | |
c17d8874 | 415 | goto out_ret_null; |
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); | |
c17d8874 | 422 | goto out_ret_null; |
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)) | |
c17d8874 | 429 | goto out_ret_null; |
1da177e4 LT |
430 | |
431 | if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { | |
432 | /* was already registered. */ | |
433 | printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); | |
c17d8874 | 434 | goto out_ret_null; |
1da177e4 LT |
435 | } |
436 | ||
437 | /* Gotta set up the fields for the device. */ | |
438 | #ifdef VLAN_DEBUG | |
439 | printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", | |
440 | vlan_name_type); | |
441 | #endif | |
442 | switch (vlan_name_type) { | |
443 | case VLAN_NAME_TYPE_RAW_PLUS_VID: | |
444 | /* name will look like: eth1.0005 */ | |
445 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); | |
446 | break; | |
447 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
448 | /* Put our vlan.VID in the name. | |
449 | * Name will look like: vlan5 | |
450 | */ | |
451 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); | |
452 | break; | |
453 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
454 | /* Put our vlan.VID in the name. | |
455 | * Name will look like: eth0.5 | |
456 | */ | |
457 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); | |
458 | break; | |
459 | case VLAN_NAME_TYPE_PLUS_VID: | |
460 | /* Put our vlan.VID in the name. | |
461 | * Name will look like: vlan0005 | |
462 | */ | |
463 | default: | |
464 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); | |
3ff50b79 | 465 | } |
122952fc | 466 | |
1da177e4 LT |
467 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
468 | vlan_setup); | |
5dd8d1e9 | 469 | |
1da177e4 | 470 | if (new_dev == NULL) |
c17d8874 | 471 | goto out_ret_null; |
1da177e4 | 472 | |
1da177e4 LT |
473 | /* need 4 bytes for extra VLAN header info, |
474 | * hope the underlying device can handle it. | |
475 | */ | |
476 | new_dev->mtu = real_dev->mtu; | |
477 | ||
2f4284a4 PM |
478 | #ifdef VLAN_DEBUG |
479 | printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); | |
1da177e4 LT |
480 | VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", |
481 | new_dev->priv, | |
482 | sizeof(struct vlan_dev_info)); | |
2f4284a4 | 483 | #endif |
1da177e4 LT |
484 | |
485 | VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ | |
486 | VLAN_DEV_INFO(new_dev)->real_dev = real_dev; | |
487 | VLAN_DEV_INFO(new_dev)->dent = NULL; | |
488 | VLAN_DEV_INFO(new_dev)->flags = 1; | |
489 | ||
490 | #ifdef VLAN_DEBUG | |
491 | printk(VLAN_DBG "About to go find the group for idx: %i\n", | |
492 | real_dev->ifindex); | |
493 | #endif | |
122952fc | 494 | |
1da177e4 LT |
495 | if (register_netdevice(new_dev)) |
496 | goto out_free_newdev; | |
497 | ||
ddd7bf9f SR |
498 | vlan_transfer_operstate(real_dev, new_dev); |
499 | linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */ | |
500 | ||
1da177e4 LT |
501 | /* So, got the sucker initialized, now lets place |
502 | * it into our local structure. | |
503 | */ | |
504 | grp = __vlan_find_group(real_dev->ifindex); | |
505 | ||
506 | /* Note, we are running under the RTNL semaphore | |
507 | * so it cannot "appear" on us. | |
508 | */ | |
509 | if (!grp) { /* need to add a new group */ | |
0da974f4 | 510 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); |
1da177e4 LT |
511 | if (!grp) |
512 | goto out_free_unregister; | |
122952fc | 513 | |
5c15bdec DA |
514 | for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { |
515 | grp->vlan_devices_arrays[i] = kzalloc( | |
516 | sizeof(struct net_device *)*VLAN_GROUP_ARRAY_PART_LEN, | |
517 | GFP_KERNEL); | |
518 | ||
519 | if (!grp->vlan_devices_arrays[i]) | |
520 | goto out_free_arrays; | |
521 | } | |
522 | ||
1da177e4 | 523 | /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */ |
1da177e4 LT |
524 | grp->real_dev_ifindex = real_dev->ifindex; |
525 | ||
122952fc | 526 | hlist_add_head_rcu(&grp->hlist, |
1da177e4 LT |
527 | &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); |
528 | ||
529 | if (real_dev->features & NETIF_F_HW_VLAN_RX) | |
530 | real_dev->vlan_rx_register(real_dev, grp); | |
531 | } | |
122952fc | 532 | |
5c15bdec | 533 | vlan_group_set_device(grp, VLAN_ID, new_dev); |
1da177e4 LT |
534 | |
535 | if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */ | |
122952fc YH |
536 | printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", |
537 | new_dev->name); | |
1da177e4 LT |
538 | |
539 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
540 | real_dev->vlan_rx_add_vid(real_dev, VLAN_ID); | |
541 | ||
c17d8874 PM |
542 | /* Account for reference in struct vlan_dev_info */ |
543 | dev_hold(real_dev); | |
1da177e4 LT |
544 | #ifdef VLAN_DEBUG |
545 | printk(VLAN_DBG "Allocated new device successfully, returning.\n"); | |
546 | #endif | |
547 | return new_dev; | |
548 | ||
5c15bdec DA |
549 | out_free_arrays: |
550 | vlan_group_free(grp); | |
551 | ||
1da177e4 LT |
552 | out_free_unregister: |
553 | unregister_netdev(new_dev); | |
c17d8874 | 554 | goto out_ret_null; |
1da177e4 LT |
555 | |
556 | out_free_newdev: | |
557 | free_netdev(new_dev); | |
558 | ||
1da177e4 LT |
559 | out_ret_null: |
560 | return NULL; | |
561 | } | |
562 | ||
563 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) | |
564 | { | |
565 | struct net_device *dev = ptr; | |
566 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); | |
567 | int i, flgs; | |
568 | struct net_device *vlandev; | |
569 | ||
570 | if (!grp) | |
571 | goto out; | |
572 | ||
573 | /* It is OK that we do not hold the group lock right now, | |
574 | * as we run under the RTNL lock. | |
575 | */ | |
576 | ||
577 | switch (event) { | |
578 | case NETDEV_CHANGE: | |
579 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 580 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 581 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
582 | if (!vlandev) |
583 | continue; | |
584 | ||
ddd7bf9f | 585 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
586 | } |
587 | break; | |
588 | ||
589 | case NETDEV_DOWN: | |
590 | /* Put all VLANs for this dev in the down state too. */ | |
591 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 592 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
593 | if (!vlandev) |
594 | continue; | |
595 | ||
596 | flgs = vlandev->flags; | |
597 | if (!(flgs & IFF_UP)) | |
598 | continue; | |
599 | ||
600 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
601 | } | |
602 | break; | |
603 | ||
604 | case NETDEV_UP: | |
605 | /* Put all VLANs for this dev in the up state too. */ | |
606 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 607 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
608 | if (!vlandev) |
609 | continue; | |
122952fc | 610 | |
1da177e4 LT |
611 | flgs = vlandev->flags; |
612 | if (flgs & IFF_UP) | |
613 | continue; | |
614 | ||
615 | dev_change_flags(vlandev, flgs | IFF_UP); | |
616 | } | |
617 | break; | |
122952fc | 618 | |
1da177e4 LT |
619 | case NETDEV_UNREGISTER: |
620 | /* Delete all VLANs for this dev. */ | |
621 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
622 | int ret; | |
623 | ||
5c15bdec | 624 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
625 | if (!vlandev) |
626 | continue; | |
627 | ||
628 | ret = unregister_vlan_dev(dev, | |
629 | VLAN_DEV_INFO(vlandev)->vlan_id); | |
630 | ||
631 | unregister_netdevice(vlandev); | |
632 | ||
633 | /* Group was destroyed? */ | |
634 | if (ret == 1) | |
635 | break; | |
636 | } | |
637 | break; | |
3ff50b79 | 638 | } |
1da177e4 LT |
639 | |
640 | out: | |
641 | return NOTIFY_DONE; | |
642 | } | |
643 | ||
644 | /* | |
645 | * VLAN IOCTL handler. | |
646 | * o execute requested action or pass command to the device driver | |
647 | * arg is really a struct vlan_ioctl_args __user *. | |
648 | */ | |
649 | static int vlan_ioctl_handler(void __user *arg) | |
650 | { | |
c17d8874 | 651 | int err; |
1da177e4 LT |
652 | unsigned short vid = 0; |
653 | struct vlan_ioctl_args args; | |
c17d8874 | 654 | struct net_device *dev = NULL; |
1da177e4 LT |
655 | |
656 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
657 | return -EFAULT; | |
658 | ||
659 | /* Null terminate this sucker, just in case. */ | |
660 | args.device1[23] = 0; | |
661 | args.u.device2[23] = 0; | |
662 | ||
663 | #ifdef VLAN_DEBUG | |
664 | printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); | |
665 | #endif | |
666 | ||
c17d8874 PM |
667 | rtnl_lock(); |
668 | ||
1da177e4 LT |
669 | switch (args.cmd) { |
670 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
671 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
672 | case SET_VLAN_FLAG_CMD: | |
673 | case ADD_VLAN_CMD: | |
674 | case DEL_VLAN_CMD: | |
675 | case GET_VLAN_REALDEV_NAME_CMD: | |
676 | case GET_VLAN_VID_CMD: | |
677 | err = -ENODEV; | |
678 | dev = __dev_get_by_name(args.device1); | |
679 | if (!dev) | |
680 | goto out; | |
681 | ||
682 | err = -EINVAL; | |
683 | if (args.cmd != ADD_VLAN_CMD && | |
684 | !(dev->priv_flags & IFF_802_1Q_VLAN)) | |
685 | goto out; | |
686 | } | |
687 | ||
688 | switch (args.cmd) { | |
689 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
690 | err = -EPERM; | |
1da177e4 | 691 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
692 | break; |
693 | vlan_dev_set_ingress_priority(dev, | |
694 | args.u.skb_priority, | |
695 | args.vlan_qos); | |
1da177e4 LT |
696 | break; |
697 | ||
698 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 699 | err = -EPERM; |
1da177e4 | 700 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
701 | break; |
702 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
703 | args.u.skb_priority, |
704 | args.vlan_qos); | |
705 | break; | |
706 | ||
707 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 708 | err = -EPERM; |
1da177e4 | 709 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
710 | break; |
711 | err = vlan_dev_set_vlan_flag(dev, | |
1da177e4 LT |
712 | args.u.flag, |
713 | args.vlan_qos); | |
714 | break; | |
715 | ||
716 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 717 | err = -EPERM; |
1da177e4 LT |
718 | if (!capable(CAP_NET_ADMIN)) |
719 | return -EPERM; | |
c17d8874 PM |
720 | if ((args.u.name_type >= 0) && |
721 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
1da177e4 LT |
722 | vlan_name_type = args.u.name_type; |
723 | err = 0; | |
724 | } else { | |
725 | err = -EINVAL; | |
726 | } | |
727 | break; | |
728 | ||
729 | case ADD_VLAN_CMD: | |
c17d8874 | 730 | err = -EPERM; |
1da177e4 | 731 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
732 | break; |
733 | if (register_vlan_device(dev, args.u.VID)) { | |
1da177e4 LT |
734 | err = 0; |
735 | } else { | |
736 | err = -EINVAL; | |
737 | } | |
738 | break; | |
739 | ||
740 | case DEL_VLAN_CMD: | |
c17d8874 | 741 | err = -EPERM; |
1da177e4 | 742 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
743 | break; |
744 | err = unregister_vlan_device(dev); | |
1da177e4 LT |
745 | break; |
746 | ||
747 | case GET_VLAN_INGRESS_PRIORITY_CMD: | |
748 | /* TODO: Implement | |
749 | err = vlan_dev_get_ingress_priority(args); | |
750 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
751 | sizeof(struct vlan_ioctl_args))) { |
752 | err = -EFAULT; | |
1da177e4 LT |
753 | } |
754 | */ | |
755 | err = -EINVAL; | |
756 | break; | |
757 | case GET_VLAN_EGRESS_PRIORITY_CMD: | |
758 | /* TODO: Implement | |
759 | err = vlan_dev_get_egress_priority(args.device1, &(args.args); | |
760 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
761 | sizeof(struct vlan_ioctl_args))) { |
762 | err = -EFAULT; | |
1da177e4 LT |
763 | } |
764 | */ | |
765 | err = -EINVAL; | |
766 | break; | |
767 | case GET_VLAN_REALDEV_NAME_CMD: | |
c17d8874 | 768 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 LT |
769 | if (copy_to_user(arg, &args, |
770 | sizeof(struct vlan_ioctl_args))) { | |
771 | err = -EFAULT; | |
772 | } | |
773 | break; | |
774 | ||
775 | case GET_VLAN_VID_CMD: | |
c17d8874 | 776 | vlan_dev_get_vid(dev, &vid); |
1da177e4 LT |
777 | args.u.VID = vid; |
778 | if (copy_to_user(arg, &args, | |
779 | sizeof(struct vlan_ioctl_args))) { | |
122952fc | 780 | err = -EFAULT; |
1da177e4 LT |
781 | } |
782 | break; | |
783 | ||
784 | default: | |
785 | /* pass on to underlying device instead?? */ | |
786 | printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", | |
787 | __FUNCTION__, args.cmd); | |
c17d8874 PM |
788 | err = -EINVAL; |
789 | break; | |
3ff50b79 | 790 | } |
7eb1b3d3 | 791 | out: |
c17d8874 | 792 | rtnl_unlock(); |
1da177e4 LT |
793 | return err; |
794 | } | |
795 | ||
796 | MODULE_LICENSE("GPL"); | |
797 | MODULE_VERSION(DRV_VERSION); |