Commit | Line | Data |
---|---|---|
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 | ||
40f98e1a PM |
83 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); |
84 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
1da177e4 LT |
85 | |
86 | /* proc file system initialization */ | |
87 | err = vlan_proc_init(); | |
88 | if (err < 0) { | |
40f98e1a | 89 | pr_err("%s: can't create entry in proc filesystem!\n", |
b7a4a836 | 90 | __FUNCTION__); |
1da177e4 LT |
91 | return err; |
92 | } | |
93 | ||
94 | dev_add_pack(&vlan_packet_type); | |
95 | ||
96 | /* Register us to receive netdevice events */ | |
97 | err = register_netdevice_notifier(&vlan_notifier_block); | |
07b5b17e PM |
98 | if (err < 0) |
99 | goto err1; | |
1da177e4 | 100 | |
07b5b17e PM |
101 | err = vlan_netlink_init(); |
102 | if (err < 0) | |
103 | goto err2; | |
1da177e4 | 104 | |
07b5b17e | 105 | vlan_ioctl_set(vlan_ioctl_handler); |
1da177e4 | 106 | return 0; |
07b5b17e PM |
107 | |
108 | err2: | |
109 | unregister_netdevice_notifier(&vlan_notifier_block); | |
110 | err1: | |
111 | vlan_proc_cleanup(); | |
112 | dev_remove_pack(&vlan_packet_type); | |
113 | return err; | |
1da177e4 LT |
114 | } |
115 | ||
1da177e4 LT |
116 | /* |
117 | * Module 'remove' entry point. | |
118 | * o delete /proc/net/router directory and static entries. | |
122952fc | 119 | */ |
1da177e4 LT |
120 | static void __exit vlan_cleanup_module(void) |
121 | { | |
122 | int i; | |
123 | ||
124 | vlan_ioctl_set(NULL); | |
3f03e387 | 125 | vlan_netlink_fini(); |
1da177e4 LT |
126 | |
127 | /* Un-register us from receiving netdevice events */ | |
128 | unregister_netdevice_notifier(&vlan_notifier_block); | |
129 | ||
130 | dev_remove_pack(&vlan_packet_type); | |
1da177e4 LT |
131 | |
132 | /* This table must be empty if there are no module | |
133 | * references left. | |
134 | */ | |
135 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) { | |
136 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
137 | } | |
138 | vlan_proc_cleanup(); | |
139 | ||
140 | synchronize_net(); | |
141 | } | |
142 | ||
143 | module_init(vlan_proto_init); | |
144 | module_exit(vlan_cleanup_module); | |
145 | ||
146 | /* Must be invoked with RCU read lock (no preempt) */ | |
147 | static struct vlan_group *__vlan_find_group(int real_dev_ifindex) | |
148 | { | |
149 | struct vlan_group *grp; | |
150 | struct hlist_node *n; | |
151 | int hash = vlan_grp_hashfn(real_dev_ifindex); | |
152 | ||
153 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { | |
154 | if (grp->real_dev_ifindex == real_dev_ifindex) | |
155 | return grp; | |
156 | } | |
157 | ||
158 | return NULL; | |
159 | } | |
160 | ||
161 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. | |
162 | * | |
163 | * Must be invoked with RCU read lock (no preempt) | |
164 | */ | |
165 | struct net_device *__find_vlan_dev(struct net_device *real_dev, | |
166 | unsigned short VID) | |
167 | { | |
168 | struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); | |
169 | ||
170 | if (grp) | |
5c15bdec | 171 | return vlan_group_get_device(grp, VID); |
1da177e4 LT |
172 | |
173 | return NULL; | |
174 | } | |
175 | ||
5c15bdec DA |
176 | static void vlan_group_free(struct vlan_group *grp) |
177 | { | |
178 | int i; | |
179 | ||
180 | for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) | |
181 | kfree(grp->vlan_devices_arrays[i]); | |
182 | kfree(grp); | |
183 | } | |
184 | ||
42429aae PM |
185 | static struct vlan_group *vlan_group_alloc(int ifindex) |
186 | { | |
187 | struct vlan_group *grp; | |
188 | unsigned int size; | |
189 | unsigned int i; | |
190 | ||
191 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
192 | if (!grp) | |
193 | return NULL; | |
194 | ||
195 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
196 | ||
197 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { | |
198 | grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL); | |
199 | if (!grp->vlan_devices_arrays[i]) | |
200 | goto err; | |
201 | } | |
202 | ||
203 | grp->real_dev_ifindex = ifindex; | |
204 | hlist_add_head_rcu(&grp->hlist, | |
205 | &vlan_group_hash[vlan_grp_hashfn(ifindex)]); | |
206 | return grp; | |
207 | ||
208 | err: | |
209 | vlan_group_free(grp); | |
210 | return NULL; | |
211 | } | |
212 | ||
1da177e4 LT |
213 | static void vlan_rcu_free(struct rcu_head *rcu) |
214 | { | |
5c15bdec | 215 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
216 | } |
217 | ||
218 | ||
219 | /* This returns 0 if everything went fine. | |
220 | * It will return 1 if the group was killed as a result. | |
221 | * A negative return indicates failure. | |
222 | * | |
223 | * The RTNL lock must be held. | |
224 | */ | |
225 | static int unregister_vlan_dev(struct net_device *real_dev, | |
226 | unsigned short vlan_id) | |
227 | { | |
228 | struct net_device *dev = NULL; | |
229 | int real_dev_ifindex = real_dev->ifindex; | |
230 | struct vlan_group *grp; | |
231 | int i, ret; | |
232 | ||
1da177e4 LT |
233 | /* sanity check */ |
234 | if (vlan_id >= VLAN_VID_MASK) | |
235 | return -EINVAL; | |
236 | ||
237 | ASSERT_RTNL(); | |
238 | grp = __vlan_find_group(real_dev_ifindex); | |
239 | ||
240 | ret = 0; | |
241 | ||
242 | if (grp) { | |
5c15bdec | 243 | dev = vlan_group_get_device(grp, vlan_id); |
1da177e4 LT |
244 | if (dev) { |
245 | /* Remove proc entry */ | |
246 | vlan_proc_rem_dev(dev); | |
247 | ||
248 | /* Take it out of our own structures, but be sure to | |
249 | * interlock with HW accelerating devices or SW vlan | |
250 | * input packet processing. | |
251 | */ | |
d2d1acdb | 252 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
1da177e4 | 253 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 254 | |
5c15bdec | 255 | vlan_group_set_device(grp, vlan_id, NULL); |
1da177e4 LT |
256 | synchronize_net(); |
257 | ||
258 | ||
259 | /* Caller unregisters (and if necessary, puts) | |
260 | * VLAN device, but we get rid of the reference to | |
261 | * real_dev here. | |
262 | */ | |
263 | dev_put(real_dev); | |
264 | ||
265 | /* If the group is now empty, kill off the | |
266 | * group. | |
267 | */ | |
268 | for (i = 0; i < VLAN_VID_MASK; i++) | |
5c15bdec | 269 | if (vlan_group_get_device(grp, i)) |
1da177e4 LT |
270 | break; |
271 | ||
272 | if (i == VLAN_VID_MASK) { | |
273 | if (real_dev->features & NETIF_F_HW_VLAN_RX) | |
274 | real_dev->vlan_rx_register(real_dev, NULL); | |
275 | ||
276 | hlist_del_rcu(&grp->hlist); | |
277 | ||
278 | /* Free the group, after all cpu's are done. */ | |
279 | call_rcu(&grp->rcu, vlan_rcu_free); | |
280 | ||
281 | grp = NULL; | |
282 | ret = 1; | |
283 | } | |
284 | } | |
285 | } | |
286 | ||
122952fc | 287 | return ret; |
1da177e4 LT |
288 | } |
289 | ||
07b5b17e | 290 | int unregister_vlan_device(struct net_device *dev) |
1da177e4 | 291 | { |
1da177e4 LT |
292 | int ret; |
293 | ||
c17d8874 PM |
294 | ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, |
295 | VLAN_DEV_INFO(dev)->vlan_id); | |
296 | unregister_netdevice(dev); | |
1da177e4 | 297 | |
c17d8874 PM |
298 | if (ret == 1) |
299 | ret = 0; | |
1da177e4 LT |
300 | return ret; |
301 | } | |
302 | ||
ddd7bf9f SR |
303 | static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) |
304 | { | |
305 | /* Have to respect userspace enforced dormant state | |
306 | * of real device, also must allow supplicant running | |
307 | * on VLAN device | |
308 | */ | |
309 | if (dev->operstate == IF_OPER_DORMANT) | |
310 | netif_dormant_on(vlandev); | |
311 | else | |
312 | netif_dormant_off(vlandev); | |
313 | ||
314 | if (netif_carrier_ok(dev)) { | |
315 | if (!netif_carrier_ok(vlandev)) | |
316 | netif_carrier_on(vlandev); | |
317 | } else { | |
318 | if (netif_carrier_ok(vlandev)) | |
319 | netif_carrier_off(vlandev); | |
320 | } | |
321 | } | |
322 | ||
07b5b17e | 323 | int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id) |
1da177e4 | 324 | { |
40f98e1a PM |
325 | char *name = real_dev->name; |
326 | ||
1da177e4 | 327 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 328 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 329 | return -EOPNOTSUPP; |
1da177e4 LT |
330 | } |
331 | ||
332 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && | |
d2d1acdb | 333 | !real_dev->vlan_rx_register) { |
40f98e1a | 334 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 335 | return -EOPNOTSUPP; |
1da177e4 LT |
336 | } |
337 | ||
338 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
d2d1acdb | 339 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
40f98e1a | 340 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 341 | return -EOPNOTSUPP; |
1da177e4 LT |
342 | } |
343 | ||
1da177e4 LT |
344 | /* The real device must be up and operating in order to |
345 | * assosciate a VLAN device with it. | |
346 | */ | |
347 | if (!(real_dev->flags & IFF_UP)) | |
c1d3ee99 | 348 | return -ENETDOWN; |
1da177e4 | 349 | |
40f98e1a | 350 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 351 | return -EEXIST; |
1da177e4 | 352 | |
c1d3ee99 PM |
353 | return 0; |
354 | } | |
355 | ||
07b5b17e | 356 | int register_vlan_dev(struct net_device *dev) |
e89fe42c PM |
357 | { |
358 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); | |
359 | struct net_device *real_dev = vlan->real_dev; | |
360 | unsigned short vlan_id = vlan->vlan_id; | |
361 | struct vlan_group *grp, *ngrp = NULL; | |
362 | int err; | |
363 | ||
364 | grp = __vlan_find_group(real_dev->ifindex); | |
365 | if (!grp) { | |
366 | ngrp = grp = vlan_group_alloc(real_dev->ifindex); | |
367 | if (!grp) | |
368 | return -ENOBUFS; | |
369 | } | |
370 | ||
371 | err = register_netdevice(dev); | |
372 | if (err < 0) | |
373 | goto out_free_group; | |
374 | ||
375 | /* Account for reference in struct vlan_dev_info */ | |
376 | dev_hold(real_dev); | |
377 | ||
378 | vlan_transfer_operstate(real_dev, dev); | |
379 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
380 | ||
381 | /* So, got the sucker initialized, now lets place | |
382 | * it into our local structure. | |
383 | */ | |
384 | vlan_group_set_device(grp, vlan_id, dev); | |
385 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) | |
386 | real_dev->vlan_rx_register(real_dev, ngrp); | |
387 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
388 | real_dev->vlan_rx_add_vid(real_dev, vlan_id); | |
389 | ||
390 | if (vlan_proc_add_dev(dev) < 0) | |
40f98e1a PM |
391 | pr_warning("8021q: failed to add proc entry for %s\n", |
392 | dev->name); | |
e89fe42c PM |
393 | return 0; |
394 | ||
395 | out_free_group: | |
396 | if (ngrp) | |
397 | vlan_group_free(ngrp); | |
398 | return err; | |
399 | } | |
400 | ||
c1d3ee99 | 401 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 402 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 403 | */ |
2ae0bf69 PM |
404 | static int register_vlan_device(struct net_device *real_dev, |
405 | unsigned short VLAN_ID) | |
c1d3ee99 | 406 | { |
c1d3ee99 PM |
407 | struct net_device *new_dev; |
408 | char name[IFNAMSIZ]; | |
2ae0bf69 | 409 | int err; |
c1d3ee99 | 410 | |
c1d3ee99 | 411 | if (VLAN_ID >= VLAN_VID_MASK) |
2ae0bf69 | 412 | return -ERANGE; |
c1d3ee99 | 413 | |
2ae0bf69 PM |
414 | err = vlan_check_real_dev(real_dev, VLAN_ID); |
415 | if (err < 0) | |
416 | return err; | |
c1d3ee99 | 417 | |
1da177e4 | 418 | /* Gotta set up the fields for the device. */ |
1da177e4 LT |
419 | switch (vlan_name_type) { |
420 | case VLAN_NAME_TYPE_RAW_PLUS_VID: | |
421 | /* name will look like: eth1.0005 */ | |
422 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); | |
423 | break; | |
424 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
425 | /* Put our vlan.VID in the name. | |
426 | * Name will look like: vlan5 | |
427 | */ | |
428 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); | |
429 | break; | |
430 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
431 | /* Put our vlan.VID in the name. | |
432 | * Name will look like: eth0.5 | |
433 | */ | |
434 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); | |
435 | break; | |
436 | case VLAN_NAME_TYPE_PLUS_VID: | |
437 | /* Put our vlan.VID in the name. | |
438 | * Name will look like: vlan0005 | |
439 | */ | |
440 | default: | |
441 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); | |
3ff50b79 | 442 | } |
122952fc | 443 | |
1da177e4 LT |
444 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
445 | vlan_setup); | |
5dd8d1e9 | 446 | |
1da177e4 | 447 | if (new_dev == NULL) |
2ae0bf69 | 448 | return -ENOBUFS; |
1da177e4 | 449 | |
1da177e4 LT |
450 | /* need 4 bytes for extra VLAN header info, |
451 | * hope the underlying device can handle it. | |
452 | */ | |
453 | new_dev->mtu = real_dev->mtu; | |
454 | ||
1da177e4 LT |
455 | VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ |
456 | VLAN_DEV_INFO(new_dev)->real_dev = real_dev; | |
457 | VLAN_DEV_INFO(new_dev)->dent = NULL; | |
a4bf3af4 | 458 | VLAN_DEV_INFO(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
1da177e4 | 459 | |
07b5b17e | 460 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
461 | err = register_vlan_dev(new_dev); |
462 | if (err < 0) | |
e89fe42c | 463 | goto out_free_newdev; |
1da177e4 | 464 | |
2ae0bf69 | 465 | return 0; |
1da177e4 | 466 | |
1da177e4 LT |
467 | out_free_newdev: |
468 | free_netdev(new_dev); | |
2ae0bf69 | 469 | return err; |
1da177e4 LT |
470 | } |
471 | ||
8c979c26 PM |
472 | static void vlan_sync_address(struct net_device *dev, |
473 | struct net_device *vlandev) | |
474 | { | |
475 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(vlandev); | |
476 | ||
477 | /* May be called without an actual change */ | |
478 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
479 | return; | |
480 | ||
481 | /* vlan address was different from the old address and is equal to | |
482 | * the new address */ | |
483 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
484 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
485 | dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); | |
486 | ||
487 | /* vlan address was equal to the old address and is different from | |
488 | * the new address */ | |
489 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
490 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
491 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); | |
492 | ||
493 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
494 | } | |
495 | ||
1da177e4 LT |
496 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) |
497 | { | |
498 | struct net_device *dev = ptr; | |
499 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); | |
500 | int i, flgs; | |
501 | struct net_device *vlandev; | |
502 | ||
e9dc8653 EB |
503 | if (dev->nd_net != &init_net) |
504 | return NOTIFY_DONE; | |
505 | ||
1da177e4 LT |
506 | if (!grp) |
507 | goto out; | |
508 | ||
509 | /* It is OK that we do not hold the group lock right now, | |
510 | * as we run under the RTNL lock. | |
511 | */ | |
512 | ||
513 | switch (event) { | |
514 | case NETDEV_CHANGE: | |
515 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 516 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 517 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
518 | if (!vlandev) |
519 | continue; | |
520 | ||
ddd7bf9f | 521 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
522 | } |
523 | break; | |
524 | ||
8c979c26 PM |
525 | case NETDEV_CHANGEADDR: |
526 | /* Adjust unicast filters on underlying device */ | |
527 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
528 | vlandev = vlan_group_get_device(grp, i); | |
529 | if (!vlandev) | |
530 | continue; | |
531 | ||
d932e04a PM |
532 | flgs = vlandev->flags; |
533 | if (!(flgs & IFF_UP)) | |
534 | continue; | |
535 | ||
8c979c26 PM |
536 | vlan_sync_address(dev, vlandev); |
537 | } | |
538 | break; | |
539 | ||
1da177e4 LT |
540 | case NETDEV_DOWN: |
541 | /* Put all VLANs for this dev in the down state too. */ | |
542 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 543 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
544 | if (!vlandev) |
545 | continue; | |
546 | ||
547 | flgs = vlandev->flags; | |
548 | if (!(flgs & IFF_UP)) | |
549 | continue; | |
550 | ||
551 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
552 | } | |
553 | break; | |
554 | ||
555 | case NETDEV_UP: | |
556 | /* Put all VLANs for this dev in the up state too. */ | |
557 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 558 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
559 | if (!vlandev) |
560 | continue; | |
122952fc | 561 | |
1da177e4 LT |
562 | flgs = vlandev->flags; |
563 | if (flgs & IFF_UP) | |
564 | continue; | |
565 | ||
566 | dev_change_flags(vlandev, flgs | IFF_UP); | |
567 | } | |
568 | break; | |
122952fc | 569 | |
1da177e4 LT |
570 | case NETDEV_UNREGISTER: |
571 | /* Delete all VLANs for this dev. */ | |
572 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
573 | int ret; | |
574 | ||
5c15bdec | 575 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
576 | if (!vlandev) |
577 | continue; | |
578 | ||
579 | ret = unregister_vlan_dev(dev, | |
580 | VLAN_DEV_INFO(vlandev)->vlan_id); | |
581 | ||
582 | unregister_netdevice(vlandev); | |
583 | ||
584 | /* Group was destroyed? */ | |
585 | if (ret == 1) | |
586 | break; | |
587 | } | |
588 | break; | |
3ff50b79 | 589 | } |
1da177e4 LT |
590 | |
591 | out: | |
592 | return NOTIFY_DONE; | |
593 | } | |
594 | ||
595 | /* | |
596 | * VLAN IOCTL handler. | |
597 | * o execute requested action or pass command to the device driver | |
598 | * arg is really a struct vlan_ioctl_args __user *. | |
599 | */ | |
881d966b | 600 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 601 | { |
c17d8874 | 602 | int err; |
1da177e4 LT |
603 | unsigned short vid = 0; |
604 | struct vlan_ioctl_args args; | |
c17d8874 | 605 | struct net_device *dev = NULL; |
1da177e4 LT |
606 | |
607 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
608 | return -EFAULT; | |
609 | ||
610 | /* Null terminate this sucker, just in case. */ | |
611 | args.device1[23] = 0; | |
612 | args.u.device2[23] = 0; | |
613 | ||
c17d8874 PM |
614 | rtnl_lock(); |
615 | ||
1da177e4 LT |
616 | switch (args.cmd) { |
617 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
618 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
619 | case SET_VLAN_FLAG_CMD: | |
620 | case ADD_VLAN_CMD: | |
621 | case DEL_VLAN_CMD: | |
622 | case GET_VLAN_REALDEV_NAME_CMD: | |
623 | case GET_VLAN_VID_CMD: | |
624 | err = -ENODEV; | |
881d966b | 625 | dev = __dev_get_by_name(&init_net, args.device1); |
c17d8874 PM |
626 | if (!dev) |
627 | goto out; | |
628 | ||
629 | err = -EINVAL; | |
630 | if (args.cmd != ADD_VLAN_CMD && | |
631 | !(dev->priv_flags & IFF_802_1Q_VLAN)) | |
632 | goto out; | |
633 | } | |
634 | ||
635 | switch (args.cmd) { | |
636 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
637 | err = -EPERM; | |
1da177e4 | 638 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
639 | break; |
640 | vlan_dev_set_ingress_priority(dev, | |
641 | args.u.skb_priority, | |
642 | args.vlan_qos); | |
fffe470a | 643 | err = 0; |
1da177e4 LT |
644 | break; |
645 | ||
646 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 647 | err = -EPERM; |
1da177e4 | 648 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
649 | break; |
650 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
651 | args.u.skb_priority, |
652 | args.vlan_qos); | |
653 | break; | |
654 | ||
655 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 656 | err = -EPERM; |
1da177e4 | 657 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
658 | break; |
659 | err = vlan_dev_set_vlan_flag(dev, | |
1da177e4 LT |
660 | args.u.flag, |
661 | args.vlan_qos); | |
662 | break; | |
663 | ||
664 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 665 | err = -EPERM; |
1da177e4 | 666 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 667 | break; |
c17d8874 PM |
668 | if ((args.u.name_type >= 0) && |
669 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
1da177e4 LT |
670 | vlan_name_type = args.u.name_type; |
671 | err = 0; | |
672 | } else { | |
673 | err = -EINVAL; | |
674 | } | |
675 | break; | |
676 | ||
677 | case ADD_VLAN_CMD: | |
c17d8874 | 678 | err = -EPERM; |
1da177e4 | 679 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 680 | break; |
2ae0bf69 | 681 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
682 | break; |
683 | ||
684 | case DEL_VLAN_CMD: | |
c17d8874 | 685 | err = -EPERM; |
1da177e4 | 686 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
687 | break; |
688 | err = unregister_vlan_device(dev); | |
1da177e4 LT |
689 | break; |
690 | ||
1da177e4 | 691 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 692 | err = 0; |
c17d8874 | 693 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 LT |
694 | if (copy_to_user(arg, &args, |
695 | sizeof(struct vlan_ioctl_args))) { | |
696 | err = -EFAULT; | |
697 | } | |
698 | break; | |
699 | ||
700 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 701 | err = 0; |
c17d8874 | 702 | vlan_dev_get_vid(dev, &vid); |
1da177e4 LT |
703 | args.u.VID = vid; |
704 | if (copy_to_user(arg, &args, | |
705 | sizeof(struct vlan_ioctl_args))) { | |
122952fc | 706 | err = -EFAULT; |
1da177e4 LT |
707 | } |
708 | break; | |
709 | ||
710 | default: | |
198a291c | 711 | err = -EOPNOTSUPP; |
c17d8874 | 712 | break; |
3ff50b79 | 713 | } |
7eb1b3d3 | 714 | out: |
c17d8874 | 715 | rtnl_unlock(); |
1da177e4 LT |
716 | return err; |
717 | } | |
718 | ||
719 | MODULE_LICENSE("GPL"); | |
720 | MODULE_VERSION(DRV_VERSION); |