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 | ||
281 | static int unregister_vlan_device(const char *vlan_IF_name) | |
282 | { | |
283 | struct net_device *dev = NULL; | |
284 | int ret; | |
285 | ||
286 | ||
287 | dev = dev_get_by_name(vlan_IF_name); | |
288 | ret = -EINVAL; | |
289 | if (dev) { | |
290 | if (dev->priv_flags & IFF_802_1Q_VLAN) { | |
291 | rtnl_lock(); | |
292 | ||
293 | ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, | |
294 | VLAN_DEV_INFO(dev)->vlan_id); | |
295 | ||
296 | dev_put(dev); | |
297 | unregister_netdevice(dev); | |
298 | ||
299 | rtnl_unlock(); | |
300 | ||
301 | if (ret == 1) | |
302 | ret = 0; | |
303 | } else { | |
122952fc | 304 | printk(VLAN_ERR |
1da177e4 LT |
305 | "%s: ERROR: Tried to remove a non-vlan device " |
306 | "with VLAN code, name: %s priv_flags: %hX\n", | |
307 | __FUNCTION__, dev->name, dev->priv_flags); | |
308 | dev_put(dev); | |
309 | ret = -EPERM; | |
310 | } | |
311 | } else { | |
312 | #ifdef VLAN_DEBUG | |
313 | printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__); | |
314 | #endif | |
315 | ret = -EINVAL; | |
316 | } | |
317 | ||
318 | return ret; | |
319 | } | |
320 | ||
321 | static void vlan_setup(struct net_device *new_dev) | |
322 | { | |
323 | SET_MODULE_OWNER(new_dev); | |
122952fc | 324 | |
1da177e4 LT |
325 | /* new_dev->ifindex = 0; it will be set when added to |
326 | * the global list. | |
327 | * iflink is set as well. | |
328 | */ | |
329 | new_dev->get_stats = vlan_dev_get_stats; | |
330 | ||
331 | /* Make this thing known as a VLAN device */ | |
332 | new_dev->priv_flags |= IFF_802_1Q_VLAN; | |
122952fc | 333 | |
1da177e4 LT |
334 | /* Set us up to have no queue, as the underlying Hardware device |
335 | * can do all the queueing we could want. | |
336 | */ | |
337 | new_dev->tx_queue_len = 0; | |
338 | ||
339 | /* set up method calls */ | |
340 | new_dev->change_mtu = vlan_dev_change_mtu; | |
341 | new_dev->open = vlan_dev_open; | |
342 | new_dev->stop = vlan_dev_stop; | |
343 | new_dev->set_mac_address = vlan_dev_set_mac_address; | |
344 | new_dev->set_multicast_list = vlan_dev_set_multicast_list; | |
345 | new_dev->destructor = free_netdev; | |
346 | new_dev->do_ioctl = vlan_dev_ioctl; | |
347 | } | |
348 | ||
ddd7bf9f SR |
349 | static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) |
350 | { | |
351 | /* Have to respect userspace enforced dormant state | |
352 | * of real device, also must allow supplicant running | |
353 | * on VLAN device | |
354 | */ | |
355 | if (dev->operstate == IF_OPER_DORMANT) | |
356 | netif_dormant_on(vlandev); | |
357 | else | |
358 | netif_dormant_off(vlandev); | |
359 | ||
360 | if (netif_carrier_ok(dev)) { | |
361 | if (!netif_carrier_ok(vlandev)) | |
362 | netif_carrier_on(vlandev); | |
363 | } else { | |
364 | if (netif_carrier_ok(vlandev)) | |
365 | netif_carrier_off(vlandev); | |
366 | } | |
367 | } | |
368 | ||
5dd8d1e9 AV |
369 | /* |
370 | * vlan network devices have devices nesting below it, and are a special | |
371 | * "super class" of normal network devices; split their locks off into a | |
372 | * separate class since they always nest. | |
373 | */ | |
374 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
375 | ||
376 | ||
1da177e4 LT |
377 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
378 | * Returns the device that was created, or NULL if there was | |
379 | * an error of some kind. | |
380 | */ | |
381 | static struct net_device *register_vlan_device(const char *eth_IF_name, | |
382 | unsigned short VLAN_ID) | |
383 | { | |
384 | struct vlan_group *grp; | |
385 | struct net_device *new_dev; | |
386 | struct net_device *real_dev; /* the ethernet device */ | |
387 | char name[IFNAMSIZ]; | |
5c15bdec | 388 | int i; |
1da177e4 LT |
389 | |
390 | #ifdef VLAN_DEBUG | |
391 | printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", | |
392 | __FUNCTION__, eth_IF_name, VLAN_ID); | |
393 | #endif | |
394 | ||
395 | if (VLAN_ID >= VLAN_VID_MASK) | |
396 | goto out_ret_null; | |
397 | ||
398 | /* find the device relating to eth_IF_name. */ | |
399 | real_dev = dev_get_by_name(eth_IF_name); | |
400 | if (!real_dev) | |
401 | goto out_ret_null; | |
402 | ||
403 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
404 | printk(VLAN_DBG "%s: VLANs not supported on %s.\n", | |
405 | __FUNCTION__, real_dev->name); | |
406 | goto out_put_dev; | |
407 | } | |
408 | ||
409 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && | |
d2d1acdb | 410 | !real_dev->vlan_rx_register) { |
1da177e4 LT |
411 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", |
412 | __FUNCTION__, real_dev->name); | |
413 | goto out_put_dev; | |
414 | } | |
415 | ||
416 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
d2d1acdb | 417 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
1da177e4 LT |
418 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", |
419 | __FUNCTION__, real_dev->name); | |
420 | goto out_put_dev; | |
421 | } | |
422 | ||
423 | /* From this point on, all the data structures must remain | |
424 | * consistent. | |
425 | */ | |
426 | rtnl_lock(); | |
427 | ||
428 | /* The real device must be up and operating in order to | |
429 | * assosciate a VLAN device with it. | |
430 | */ | |
431 | if (!(real_dev->flags & IFF_UP)) | |
432 | goto out_unlock; | |
433 | ||
434 | if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { | |
435 | /* was already registered. */ | |
436 | printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); | |
437 | goto out_unlock; | |
438 | } | |
439 | ||
440 | /* Gotta set up the fields for the device. */ | |
441 | #ifdef VLAN_DEBUG | |
442 | printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", | |
443 | vlan_name_type); | |
444 | #endif | |
445 | switch (vlan_name_type) { | |
446 | case VLAN_NAME_TYPE_RAW_PLUS_VID: | |
447 | /* name will look like: eth1.0005 */ | |
448 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); | |
449 | break; | |
450 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
451 | /* Put our vlan.VID in the name. | |
452 | * Name will look like: vlan5 | |
453 | */ | |
454 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); | |
455 | break; | |
456 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
457 | /* Put our vlan.VID in the name. | |
458 | * Name will look like: eth0.5 | |
459 | */ | |
460 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); | |
461 | break; | |
462 | case VLAN_NAME_TYPE_PLUS_VID: | |
463 | /* Put our vlan.VID in the name. | |
464 | * Name will look like: vlan0005 | |
465 | */ | |
466 | default: | |
467 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); | |
3ff50b79 | 468 | } |
122952fc | 469 | |
1da177e4 LT |
470 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
471 | vlan_setup); | |
5dd8d1e9 | 472 | |
1da177e4 LT |
473 | if (new_dev == NULL) |
474 | goto out_unlock; | |
475 | ||
476 | #ifdef VLAN_DEBUG | |
477 | printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); | |
478 | #endif | |
479 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ | |
480 | new_dev->flags = real_dev->flags; | |
481 | new_dev->flags &= ~IFF_UP; | |
482 | ||
6c753c3d SR |
483 | new_dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | |
484 | (1<<__LINK_STATE_DORMANT))) | | |
122952fc | 485 | (1<<__LINK_STATE_PRESENT); |
1da177e4 LT |
486 | |
487 | /* need 4 bytes for extra VLAN header info, | |
488 | * hope the underlying device can handle it. | |
489 | */ | |
490 | new_dev->mtu = real_dev->mtu; | |
491 | ||
492 | /* TODO: maybe just assign it to be ETHERNET? */ | |
493 | new_dev->type = real_dev->type; | |
494 | ||
495 | new_dev->hard_header_len = real_dev->hard_header_len; | |
496 | if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) { | |
497 | /* Regular ethernet + 4 bytes (18 total). */ | |
498 | new_dev->hard_header_len += VLAN_HLEN; | |
499 | } | |
500 | ||
501 | VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", | |
502 | new_dev->priv, | |
503 | sizeof(struct vlan_dev_info)); | |
122952fc | 504 | |
1da177e4 LT |
505 | memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len); |
506 | memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len); | |
507 | new_dev->addr_len = real_dev->addr_len; | |
508 | ||
509 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { | |
510 | new_dev->hard_header = real_dev->hard_header; | |
511 | new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; | |
512 | new_dev->rebuild_header = real_dev->rebuild_header; | |
513 | } else { | |
514 | new_dev->hard_header = vlan_dev_hard_header; | |
515 | new_dev->hard_start_xmit = vlan_dev_hard_start_xmit; | |
516 | new_dev->rebuild_header = vlan_dev_rebuild_header; | |
517 | } | |
518 | new_dev->hard_header_parse = real_dev->hard_header_parse; | |
519 | ||
520 | VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ | |
521 | VLAN_DEV_INFO(new_dev)->real_dev = real_dev; | |
522 | VLAN_DEV_INFO(new_dev)->dent = NULL; | |
523 | VLAN_DEV_INFO(new_dev)->flags = 1; | |
524 | ||
525 | #ifdef VLAN_DEBUG | |
526 | printk(VLAN_DBG "About to go find the group for idx: %i\n", | |
527 | real_dev->ifindex); | |
528 | #endif | |
122952fc | 529 | |
1da177e4 LT |
530 | if (register_netdevice(new_dev)) |
531 | goto out_free_newdev; | |
532 | ||
5dd8d1e9 AV |
533 | lockdep_set_class(&new_dev->_xmit_lock, &vlan_netdev_xmit_lock_key); |
534 | ||
ddd7bf9f SR |
535 | new_dev->iflink = real_dev->ifindex; |
536 | vlan_transfer_operstate(real_dev, new_dev); | |
537 | linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */ | |
538 | ||
1da177e4 LT |
539 | /* So, got the sucker initialized, now lets place |
540 | * it into our local structure. | |
541 | */ | |
542 | grp = __vlan_find_group(real_dev->ifindex); | |
543 | ||
544 | /* Note, we are running under the RTNL semaphore | |
545 | * so it cannot "appear" on us. | |
546 | */ | |
547 | if (!grp) { /* need to add a new group */ | |
0da974f4 | 548 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); |
1da177e4 LT |
549 | if (!grp) |
550 | goto out_free_unregister; | |
122952fc | 551 | |
5c15bdec DA |
552 | for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { |
553 | grp->vlan_devices_arrays[i] = kzalloc( | |
554 | sizeof(struct net_device *)*VLAN_GROUP_ARRAY_PART_LEN, | |
555 | GFP_KERNEL); | |
556 | ||
557 | if (!grp->vlan_devices_arrays[i]) | |
558 | goto out_free_arrays; | |
559 | } | |
560 | ||
1da177e4 | 561 | /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */ |
1da177e4 LT |
562 | grp->real_dev_ifindex = real_dev->ifindex; |
563 | ||
122952fc | 564 | hlist_add_head_rcu(&grp->hlist, |
1da177e4 LT |
565 | &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); |
566 | ||
567 | if (real_dev->features & NETIF_F_HW_VLAN_RX) | |
568 | real_dev->vlan_rx_register(real_dev, grp); | |
569 | } | |
122952fc | 570 | |
5c15bdec | 571 | vlan_group_set_device(grp, VLAN_ID, new_dev); |
1da177e4 LT |
572 | |
573 | if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */ | |
122952fc YH |
574 | printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", |
575 | new_dev->name); | |
1da177e4 LT |
576 | |
577 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
578 | real_dev->vlan_rx_add_vid(real_dev, VLAN_ID); | |
579 | ||
580 | rtnl_unlock(); | |
581 | ||
582 | ||
583 | #ifdef VLAN_DEBUG | |
584 | printk(VLAN_DBG "Allocated new device successfully, returning.\n"); | |
585 | #endif | |
586 | return new_dev; | |
587 | ||
5c15bdec DA |
588 | out_free_arrays: |
589 | vlan_group_free(grp); | |
590 | ||
1da177e4 LT |
591 | out_free_unregister: |
592 | unregister_netdev(new_dev); | |
593 | goto out_unlock; | |
594 | ||
595 | out_free_newdev: | |
596 | free_netdev(new_dev); | |
597 | ||
598 | out_unlock: | |
599 | rtnl_unlock(); | |
600 | ||
601 | out_put_dev: | |
602 | dev_put(real_dev); | |
603 | ||
604 | out_ret_null: | |
605 | return NULL; | |
606 | } | |
607 | ||
608 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) | |
609 | { | |
610 | struct net_device *dev = ptr; | |
611 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); | |
612 | int i, flgs; | |
613 | struct net_device *vlandev; | |
614 | ||
615 | if (!grp) | |
616 | goto out; | |
617 | ||
618 | /* It is OK that we do not hold the group lock right now, | |
619 | * as we run under the RTNL lock. | |
620 | */ | |
621 | ||
622 | switch (event) { | |
623 | case NETDEV_CHANGE: | |
624 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 625 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 626 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
627 | if (!vlandev) |
628 | continue; | |
629 | ||
ddd7bf9f | 630 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
631 | } |
632 | break; | |
633 | ||
634 | case NETDEV_DOWN: | |
635 | /* Put all VLANs for this dev in the down state too. */ | |
636 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 637 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
638 | if (!vlandev) |
639 | continue; | |
640 | ||
641 | flgs = vlandev->flags; | |
642 | if (!(flgs & IFF_UP)) | |
643 | continue; | |
644 | ||
645 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
646 | } | |
647 | break; | |
648 | ||
649 | case NETDEV_UP: | |
650 | /* Put all VLANs for this dev in the up state too. */ | |
651 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 652 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
653 | if (!vlandev) |
654 | continue; | |
122952fc | 655 | |
1da177e4 LT |
656 | flgs = vlandev->flags; |
657 | if (flgs & IFF_UP) | |
658 | continue; | |
659 | ||
660 | dev_change_flags(vlandev, flgs | IFF_UP); | |
661 | } | |
662 | break; | |
122952fc | 663 | |
1da177e4 LT |
664 | case NETDEV_UNREGISTER: |
665 | /* Delete all VLANs for this dev. */ | |
666 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
667 | int ret; | |
668 | ||
5c15bdec | 669 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
670 | if (!vlandev) |
671 | continue; | |
672 | ||
673 | ret = unregister_vlan_dev(dev, | |
674 | VLAN_DEV_INFO(vlandev)->vlan_id); | |
675 | ||
676 | unregister_netdevice(vlandev); | |
677 | ||
678 | /* Group was destroyed? */ | |
679 | if (ret == 1) | |
680 | break; | |
681 | } | |
682 | break; | |
3ff50b79 | 683 | } |
1da177e4 LT |
684 | |
685 | out: | |
686 | return NOTIFY_DONE; | |
687 | } | |
688 | ||
689 | /* | |
690 | * VLAN IOCTL handler. | |
691 | * o execute requested action or pass command to the device driver | |
692 | * arg is really a struct vlan_ioctl_args __user *. | |
693 | */ | |
694 | static int vlan_ioctl_handler(void __user *arg) | |
695 | { | |
696 | int err = 0; | |
697 | unsigned short vid = 0; | |
698 | struct vlan_ioctl_args args; | |
699 | ||
700 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
701 | return -EFAULT; | |
702 | ||
703 | /* Null terminate this sucker, just in case. */ | |
704 | args.device1[23] = 0; | |
705 | args.u.device2[23] = 0; | |
706 | ||
707 | #ifdef VLAN_DEBUG | |
708 | printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); | |
709 | #endif | |
710 | ||
711 | switch (args.cmd) { | |
712 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
713 | if (!capable(CAP_NET_ADMIN)) | |
714 | return -EPERM; | |
715 | err = vlan_dev_set_ingress_priority(args.device1, | |
716 | args.u.skb_priority, | |
717 | args.vlan_qos); | |
718 | break; | |
719 | ||
720 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
721 | if (!capable(CAP_NET_ADMIN)) | |
722 | return -EPERM; | |
723 | err = vlan_dev_set_egress_priority(args.device1, | |
724 | args.u.skb_priority, | |
725 | args.vlan_qos); | |
726 | break; | |
727 | ||
728 | case SET_VLAN_FLAG_CMD: | |
729 | if (!capable(CAP_NET_ADMIN)) | |
730 | return -EPERM; | |
731 | err = vlan_dev_set_vlan_flag(args.device1, | |
732 | args.u.flag, | |
733 | args.vlan_qos); | |
734 | break; | |
735 | ||
736 | case SET_VLAN_NAME_TYPE_CMD: | |
737 | if (!capable(CAP_NET_ADMIN)) | |
738 | return -EPERM; | |
75202e76 | 739 | if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { |
1da177e4 LT |
740 | vlan_name_type = args.u.name_type; |
741 | err = 0; | |
742 | } else { | |
743 | err = -EINVAL; | |
744 | } | |
745 | break; | |
746 | ||
747 | case ADD_VLAN_CMD: | |
748 | if (!capable(CAP_NET_ADMIN)) | |
749 | return -EPERM; | |
750 | /* we have been given the name of the Ethernet Device we want to | |
751 | * talk to: args.dev1 We also have the | |
752 | * VLAN ID: args.u.VID | |
753 | */ | |
754 | if (register_vlan_device(args.device1, args.u.VID)) { | |
755 | err = 0; | |
756 | } else { | |
757 | err = -EINVAL; | |
758 | } | |
759 | break; | |
760 | ||
761 | case DEL_VLAN_CMD: | |
762 | if (!capable(CAP_NET_ADMIN)) | |
763 | return -EPERM; | |
764 | /* Here, the args.dev1 is the actual VLAN we want | |
765 | * to get rid of. | |
766 | */ | |
767 | err = unregister_vlan_device(args.device1); | |
768 | break; | |
769 | ||
770 | case GET_VLAN_INGRESS_PRIORITY_CMD: | |
771 | /* TODO: Implement | |
772 | err = vlan_dev_get_ingress_priority(args); | |
773 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
774 | sizeof(struct vlan_ioctl_args))) { |
775 | err = -EFAULT; | |
1da177e4 LT |
776 | } |
777 | */ | |
778 | err = -EINVAL; | |
779 | break; | |
780 | case GET_VLAN_EGRESS_PRIORITY_CMD: | |
781 | /* TODO: Implement | |
782 | err = vlan_dev_get_egress_priority(args.device1, &(args.args); | |
783 | if (copy_to_user((void*)arg, &args, | |
122952fc YH |
784 | sizeof(struct vlan_ioctl_args))) { |
785 | err = -EFAULT; | |
1da177e4 LT |
786 | } |
787 | */ | |
788 | err = -EINVAL; | |
789 | break; | |
790 | case GET_VLAN_REALDEV_NAME_CMD: | |
791 | err = vlan_dev_get_realdev_name(args.device1, args.u.device2); | |
7eb1b3d3 MK |
792 | if (err) |
793 | goto out; | |
1da177e4 LT |
794 | if (copy_to_user(arg, &args, |
795 | sizeof(struct vlan_ioctl_args))) { | |
796 | err = -EFAULT; | |
797 | } | |
798 | break; | |
799 | ||
800 | case GET_VLAN_VID_CMD: | |
801 | err = vlan_dev_get_vid(args.device1, &vid); | |
7eb1b3d3 MK |
802 | if (err) |
803 | goto out; | |
1da177e4 LT |
804 | args.u.VID = vid; |
805 | if (copy_to_user(arg, &args, | |
806 | sizeof(struct vlan_ioctl_args))) { | |
122952fc | 807 | err = -EFAULT; |
1da177e4 LT |
808 | } |
809 | break; | |
810 | ||
811 | default: | |
812 | /* pass on to underlying device instead?? */ | |
813 | printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", | |
814 | __FUNCTION__, args.cmd); | |
815 | return -EINVAL; | |
3ff50b79 | 816 | } |
7eb1b3d3 | 817 | out: |
1da177e4 LT |
818 | return err; |
819 | } | |
820 | ||
821 | MODULE_LICENSE("GPL"); | |
822 | MODULE_VERSION(DRV_VERSION); |