Root/
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: netdev@vger.kernel.org |
7 | * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html |
8 | * |
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 <linux/capability.h> |
22 | #include <linux/module.h> |
23 | #include <linux/netdevice.h> |
24 | #include <linux/skbuff.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> |
27 | #include <linux/rculist.h> |
28 | #include <net/p8022.h> |
29 | #include <net/arp.h> |
30 | #include <linux/rtnetlink.h> |
31 | #include <linux/notifier.h> |
32 | #include <net/rtnetlink.h> |
33 | #include <net/net_namespace.h> |
34 | #include <net/netns/generic.h> |
35 | #include <asm/uaccess.h> |
36 | |
37 | #include <linux/if_vlan.h> |
38 | #include "vlan.h" |
39 | #include "vlanproc.h" |
40 | |
41 | #define DRV_VERSION "1.8" |
42 | |
43 | /* Global VLAN variables */ |
44 | |
45 | int vlan_net_id __read_mostly; |
46 | |
47 | /* Our listing of VLAN group(s) */ |
48 | static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; |
49 | |
50 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
51 | const char vlan_version[] = DRV_VERSION; |
52 | static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; |
53 | static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; |
54 | |
55 | static struct packet_type vlan_packet_type __read_mostly = { |
56 | .type = cpu_to_be16(ETH_P_8021Q), |
57 | .func = vlan_skb_recv, /* VLAN receive method */ |
58 | }; |
59 | |
60 | /* End of global variables definitions. */ |
61 | |
62 | static inline unsigned int vlan_grp_hashfn(unsigned int idx) |
63 | { |
64 | return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK; |
65 | } |
66 | |
67 | /* Must be invoked with RCU read lock (no preempt) */ |
68 | static struct vlan_group *__vlan_find_group(struct net_device *real_dev) |
69 | { |
70 | struct vlan_group *grp; |
71 | struct hlist_node *n; |
72 | int hash = vlan_grp_hashfn(real_dev->ifindex); |
73 | |
74 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { |
75 | if (grp->real_dev == real_dev) |
76 | return grp; |
77 | } |
78 | |
79 | return NULL; |
80 | } |
81 | |
82 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. |
83 | * |
84 | * Must be invoked with RCU read lock (no preempt) |
85 | */ |
86 | struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id) |
87 | { |
88 | struct vlan_group *grp = __vlan_find_group(real_dev); |
89 | |
90 | if (grp) |
91 | return vlan_group_get_device(grp, vlan_id); |
92 | |
93 | return NULL; |
94 | } |
95 | |
96 | static void vlan_group_free(struct vlan_group *grp) |
97 | { |
98 | int i; |
99 | |
100 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
101 | kfree(grp->vlan_devices_arrays[i]); |
102 | kfree(grp); |
103 | } |
104 | |
105 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
106 | { |
107 | struct vlan_group *grp; |
108 | |
109 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); |
110 | if (!grp) |
111 | return NULL; |
112 | |
113 | grp->real_dev = real_dev; |
114 | hlist_add_head_rcu(&grp->hlist, |
115 | &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); |
116 | return grp; |
117 | } |
118 | |
119 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
120 | { |
121 | struct net_device **array; |
122 | unsigned int size; |
123 | |
124 | ASSERT_RTNL(); |
125 | |
126 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
127 | if (array != NULL) |
128 | return 0; |
129 | |
130 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; |
131 | array = kzalloc(size, GFP_KERNEL); |
132 | if (array == NULL) |
133 | return -ENOBUFS; |
134 | |
135 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
136 | return 0; |
137 | } |
138 | |
139 | static void vlan_rcu_free(struct rcu_head *rcu) |
140 | { |
141 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
142 | } |
143 | |
144 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
145 | { |
146 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
147 | struct net_device *real_dev = vlan->real_dev; |
148 | const struct net_device_ops *ops = real_dev->netdev_ops; |
149 | struct vlan_group *grp; |
150 | u16 vlan_id = vlan->vlan_id; |
151 | |
152 | ASSERT_RTNL(); |
153 | |
154 | grp = __vlan_find_group(real_dev); |
155 | BUG_ON(!grp); |
156 | |
157 | /* Take it out of our own structures, but be sure to interlock with |
158 | * HW accelerating devices or SW vlan input packet processing. |
159 | */ |
160 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
161 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
162 | |
163 | grp->nr_vlans--; |
164 | |
165 | vlan_group_set_device(grp, vlan_id, NULL); |
166 | if (!grp->killall) |
167 | synchronize_net(); |
168 | |
169 | unregister_netdevice_queue(dev, head); |
170 | |
171 | /* If the group is now empty, kill off the group. */ |
172 | if (grp->nr_vlans == 0) { |
173 | vlan_gvrp_uninit_applicant(real_dev); |
174 | |
175 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
176 | ops->ndo_vlan_rx_register(real_dev, NULL); |
177 | |
178 | hlist_del_rcu(&grp->hlist); |
179 | |
180 | /* Free the group, after all cpu's are done. */ |
181 | call_rcu(&grp->rcu, vlan_rcu_free); |
182 | } |
183 | |
184 | /* Get rid of the vlan's reference to real_dev */ |
185 | dev_put(real_dev); |
186 | } |
187 | |
188 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
189 | { |
190 | const char *name = real_dev->name; |
191 | const struct net_device_ops *ops = real_dev->netdev_ops; |
192 | |
193 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
194 | pr_info("8021q: VLANs not supported on %s\n", name); |
195 | return -EOPNOTSUPP; |
196 | } |
197 | |
198 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) { |
199 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
200 | return -EOPNOTSUPP; |
201 | } |
202 | |
203 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
204 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
205 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
206 | return -EOPNOTSUPP; |
207 | } |
208 | |
209 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
210 | return -EEXIST; |
211 | |
212 | return 0; |
213 | } |
214 | |
215 | int register_vlan_dev(struct net_device *dev) |
216 | { |
217 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
218 | struct net_device *real_dev = vlan->real_dev; |
219 | const struct net_device_ops *ops = real_dev->netdev_ops; |
220 | u16 vlan_id = vlan->vlan_id; |
221 | struct vlan_group *grp, *ngrp = NULL; |
222 | int err; |
223 | |
224 | grp = __vlan_find_group(real_dev); |
225 | if (!grp) { |
226 | ngrp = grp = vlan_group_alloc(real_dev); |
227 | if (!grp) |
228 | return -ENOBUFS; |
229 | err = vlan_gvrp_init_applicant(real_dev); |
230 | if (err < 0) |
231 | goto out_free_group; |
232 | } |
233 | |
234 | err = vlan_group_prealloc_vid(grp, vlan_id); |
235 | if (err < 0) |
236 | goto out_uninit_applicant; |
237 | |
238 | err = register_netdevice(dev); |
239 | if (err < 0) |
240 | goto out_uninit_applicant; |
241 | |
242 | /* Account for reference in struct vlan_dev_info */ |
243 | dev_hold(real_dev); |
244 | |
245 | netif_stacked_transfer_operstate(real_dev, dev); |
246 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
247 | |
248 | /* So, got the sucker initialized, now lets place |
249 | * it into our local structure. |
250 | */ |
251 | vlan_group_set_device(grp, vlan_id, dev); |
252 | grp->nr_vlans++; |
253 | |
254 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
255 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
256 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
257 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
258 | |
259 | return 0; |
260 | |
261 | out_uninit_applicant: |
262 | if (ngrp) |
263 | vlan_gvrp_uninit_applicant(real_dev); |
264 | out_free_group: |
265 | if (ngrp) { |
266 | hlist_del_rcu(&ngrp->hlist); |
267 | /* Free the group, after all cpu's are done. */ |
268 | call_rcu(&ngrp->rcu, vlan_rcu_free); |
269 | } |
270 | return err; |
271 | } |
272 | |
273 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
274 | * Returns 0 if the device was created or a negative error code otherwise. |
275 | */ |
276 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
277 | { |
278 | struct net_device *new_dev; |
279 | struct net *net = dev_net(real_dev); |
280 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
281 | char name[IFNAMSIZ]; |
282 | int err; |
283 | |
284 | if (vlan_id >= VLAN_VID_MASK) |
285 | return -ERANGE; |
286 | |
287 | err = vlan_check_real_dev(real_dev, vlan_id); |
288 | if (err < 0) |
289 | return err; |
290 | |
291 | /* Gotta set up the fields for the device. */ |
292 | switch (vn->name_type) { |
293 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
294 | /* name will look like: eth1.0005 */ |
295 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
296 | break; |
297 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: |
298 | /* Put our vlan.VID in the name. |
299 | * Name will look like: vlan5 |
300 | */ |
301 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
302 | break; |
303 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: |
304 | /* Put our vlan.VID in the name. |
305 | * Name will look like: eth0.5 |
306 | */ |
307 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
308 | break; |
309 | case VLAN_NAME_TYPE_PLUS_VID: |
310 | /* Put our vlan.VID in the name. |
311 | * Name will look like: vlan0005 |
312 | */ |
313 | default: |
314 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
315 | } |
316 | |
317 | new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name, |
318 | vlan_setup, real_dev->num_tx_queues); |
319 | |
320 | if (new_dev == NULL) |
321 | return -ENOBUFS; |
322 | |
323 | new_dev->real_num_tx_queues = real_dev->real_num_tx_queues; |
324 | dev_net_set(new_dev, net); |
325 | /* need 4 bytes for extra VLAN header info, |
326 | * hope the underlying device can handle it. |
327 | */ |
328 | new_dev->mtu = real_dev->mtu; |
329 | |
330 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
331 | vlan_dev_info(new_dev)->real_dev = real_dev; |
332 | vlan_dev_info(new_dev)->dent = NULL; |
333 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
334 | |
335 | new_dev->rtnl_link_ops = &vlan_link_ops; |
336 | err = register_vlan_dev(new_dev); |
337 | if (err < 0) |
338 | goto out_free_newdev; |
339 | |
340 | return 0; |
341 | |
342 | out_free_newdev: |
343 | free_netdev(new_dev); |
344 | return err; |
345 | } |
346 | |
347 | static void vlan_sync_address(struct net_device *dev, |
348 | struct net_device *vlandev) |
349 | { |
350 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
351 | |
352 | /* May be called without an actual change */ |
353 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) |
354 | return; |
355 | |
356 | /* vlan address was different from the old address and is equal to |
357 | * the new address */ |
358 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
359 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
360 | dev_unicast_delete(dev, vlandev->dev_addr); |
361 | |
362 | /* vlan address was equal to the old address and is different from |
363 | * the new address */ |
364 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
365 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
366 | dev_unicast_add(dev, vlandev->dev_addr); |
367 | |
368 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); |
369 | } |
370 | |
371 | static void vlan_transfer_features(struct net_device *dev, |
372 | struct net_device *vlandev) |
373 | { |
374 | unsigned long old_features = vlandev->features; |
375 | |
376 | vlandev->features &= ~dev->vlan_features; |
377 | vlandev->features |= dev->features & dev->vlan_features; |
378 | vlandev->gso_max_size = dev->gso_max_size; |
379 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
380 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
381 | #endif |
382 | vlandev->real_num_tx_queues = dev->real_num_tx_queues; |
383 | BUG_ON(vlandev->real_num_tx_queues > vlandev->num_tx_queues); |
384 | |
385 | if (old_features != vlandev->features) |
386 | netdev_features_change(vlandev); |
387 | } |
388 | |
389 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
390 | { |
391 | switch (event) { |
392 | case NETDEV_CHANGENAME: |
393 | vlan_proc_rem_dev(dev); |
394 | if (vlan_proc_add_dev(dev) < 0) |
395 | pr_warning("8021q: failed to change proc name for %s\n", |
396 | dev->name); |
397 | break; |
398 | case NETDEV_REGISTER: |
399 | if (vlan_proc_add_dev(dev) < 0) |
400 | pr_warning("8021q: failed to add proc entry for %s\n", |
401 | dev->name); |
402 | break; |
403 | case NETDEV_UNREGISTER: |
404 | vlan_proc_rem_dev(dev); |
405 | break; |
406 | } |
407 | } |
408 | |
409 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
410 | void *ptr) |
411 | { |
412 | struct net_device *dev = ptr; |
413 | struct vlan_group *grp; |
414 | int i, flgs; |
415 | struct net_device *vlandev; |
416 | struct vlan_dev_info *vlan; |
417 | LIST_HEAD(list); |
418 | |
419 | if (is_vlan_dev(dev)) |
420 | __vlan_device_event(dev, event); |
421 | |
422 | grp = __vlan_find_group(dev); |
423 | if (!grp) |
424 | goto out; |
425 | |
426 | /* It is OK that we do not hold the group lock right now, |
427 | * as we run under the RTNL lock. |
428 | */ |
429 | |
430 | switch (event) { |
431 | case NETDEV_CHANGE: |
432 | /* Propagate real device state to vlan devices */ |
433 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
434 | vlandev = vlan_group_get_device(grp, i); |
435 | if (!vlandev) |
436 | continue; |
437 | |
438 | netif_stacked_transfer_operstate(dev, vlandev); |
439 | } |
440 | break; |
441 | |
442 | case NETDEV_CHANGEADDR: |
443 | /* Adjust unicast filters on underlying device */ |
444 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
445 | vlandev = vlan_group_get_device(grp, i); |
446 | if (!vlandev) |
447 | continue; |
448 | |
449 | flgs = vlandev->flags; |
450 | if (!(flgs & IFF_UP)) |
451 | continue; |
452 | |
453 | vlan_sync_address(dev, vlandev); |
454 | } |
455 | break; |
456 | |
457 | case NETDEV_CHANGEMTU: |
458 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
459 | vlandev = vlan_group_get_device(grp, i); |
460 | if (!vlandev) |
461 | continue; |
462 | |
463 | if (vlandev->mtu <= dev->mtu) |
464 | continue; |
465 | |
466 | dev_set_mtu(vlandev, dev->mtu); |
467 | } |
468 | break; |
469 | |
470 | case NETDEV_FEAT_CHANGE: |
471 | /* Propagate device features to underlying device */ |
472 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
473 | vlandev = vlan_group_get_device(grp, i); |
474 | if (!vlandev) |
475 | continue; |
476 | |
477 | vlan_transfer_features(dev, vlandev); |
478 | } |
479 | |
480 | break; |
481 | |
482 | case NETDEV_DOWN: |
483 | /* Put all VLANs for this dev in the down state too. */ |
484 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
485 | vlandev = vlan_group_get_device(grp, i); |
486 | if (!vlandev) |
487 | continue; |
488 | |
489 | flgs = vlandev->flags; |
490 | if (!(flgs & IFF_UP)) |
491 | continue; |
492 | |
493 | vlan = vlan_dev_info(vlandev); |
494 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
495 | dev_change_flags(vlandev, flgs & ~IFF_UP); |
496 | netif_stacked_transfer_operstate(dev, vlandev); |
497 | } |
498 | break; |
499 | |
500 | case NETDEV_UP: |
501 | /* Put all VLANs for this dev in the up state too. */ |
502 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
503 | vlandev = vlan_group_get_device(grp, i); |
504 | if (!vlandev) |
505 | continue; |
506 | |
507 | flgs = vlandev->flags; |
508 | if (flgs & IFF_UP) |
509 | continue; |
510 | |
511 | vlan = vlan_dev_info(vlandev); |
512 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
513 | dev_change_flags(vlandev, flgs | IFF_UP); |
514 | netif_stacked_transfer_operstate(dev, vlandev); |
515 | } |
516 | break; |
517 | |
518 | case NETDEV_UNREGISTER: |
519 | /* Delete all VLANs for this dev. */ |
520 | grp->killall = 1; |
521 | |
522 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
523 | vlandev = vlan_group_get_device(grp, i); |
524 | if (!vlandev) |
525 | continue; |
526 | |
527 | /* unregistration of last vlan destroys group, abort |
528 | * afterwards */ |
529 | if (grp->nr_vlans == 1) |
530 | i = VLAN_GROUP_ARRAY_LEN; |
531 | |
532 | unregister_vlan_dev(vlandev, &list); |
533 | } |
534 | unregister_netdevice_many(&list); |
535 | break; |
536 | } |
537 | |
538 | out: |
539 | return NOTIFY_DONE; |
540 | } |
541 | |
542 | static struct notifier_block vlan_notifier_block __read_mostly = { |
543 | .notifier_call = vlan_device_event, |
544 | }; |
545 | |
546 | /* |
547 | * VLAN IOCTL handler. |
548 | * o execute requested action or pass command to the device driver |
549 | * arg is really a struct vlan_ioctl_args __user *. |
550 | */ |
551 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
552 | { |
553 | int err; |
554 | struct vlan_ioctl_args args; |
555 | struct net_device *dev = NULL; |
556 | |
557 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) |
558 | return -EFAULT; |
559 | |
560 | /* Null terminate this sucker, just in case. */ |
561 | args.device1[23] = 0; |
562 | args.u.device2[23] = 0; |
563 | |
564 | rtnl_lock(); |
565 | |
566 | switch (args.cmd) { |
567 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
568 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
569 | case SET_VLAN_FLAG_CMD: |
570 | case ADD_VLAN_CMD: |
571 | case DEL_VLAN_CMD: |
572 | case GET_VLAN_REALDEV_NAME_CMD: |
573 | case GET_VLAN_VID_CMD: |
574 | err = -ENODEV; |
575 | dev = __dev_get_by_name(net, args.device1); |
576 | if (!dev) |
577 | goto out; |
578 | |
579 | err = -EINVAL; |
580 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
581 | goto out; |
582 | } |
583 | |
584 | switch (args.cmd) { |
585 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
586 | err = -EPERM; |
587 | if (!capable(CAP_NET_ADMIN)) |
588 | break; |
589 | vlan_dev_set_ingress_priority(dev, |
590 | args.u.skb_priority, |
591 | args.vlan_qos); |
592 | err = 0; |
593 | break; |
594 | |
595 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
596 | err = -EPERM; |
597 | if (!capable(CAP_NET_ADMIN)) |
598 | break; |
599 | err = vlan_dev_set_egress_priority(dev, |
600 | args.u.skb_priority, |
601 | args.vlan_qos); |
602 | break; |
603 | |
604 | case SET_VLAN_FLAG_CMD: |
605 | err = -EPERM; |
606 | if (!capable(CAP_NET_ADMIN)) |
607 | break; |
608 | err = vlan_dev_change_flags(dev, |
609 | args.vlan_qos ? args.u.flag : 0, |
610 | args.u.flag); |
611 | break; |
612 | |
613 | case SET_VLAN_NAME_TYPE_CMD: |
614 | err = -EPERM; |
615 | if (!capable(CAP_NET_ADMIN)) |
616 | break; |
617 | if ((args.u.name_type >= 0) && |
618 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { |
619 | struct vlan_net *vn; |
620 | |
621 | vn = net_generic(net, vlan_net_id); |
622 | vn->name_type = args.u.name_type; |
623 | err = 0; |
624 | } else { |
625 | err = -EINVAL; |
626 | } |
627 | break; |
628 | |
629 | case ADD_VLAN_CMD: |
630 | err = -EPERM; |
631 | if (!capable(CAP_NET_ADMIN)) |
632 | break; |
633 | err = register_vlan_device(dev, args.u.VID); |
634 | break; |
635 | |
636 | case DEL_VLAN_CMD: |
637 | err = -EPERM; |
638 | if (!capable(CAP_NET_ADMIN)) |
639 | break; |
640 | unregister_vlan_dev(dev, NULL); |
641 | err = 0; |
642 | break; |
643 | |
644 | case GET_VLAN_REALDEV_NAME_CMD: |
645 | err = 0; |
646 | vlan_dev_get_realdev_name(dev, args.u.device2); |
647 | if (copy_to_user(arg, &args, |
648 | sizeof(struct vlan_ioctl_args))) |
649 | err = -EFAULT; |
650 | break; |
651 | |
652 | case GET_VLAN_VID_CMD: |
653 | err = 0; |
654 | args.u.VID = vlan_dev_vlan_id(dev); |
655 | if (copy_to_user(arg, &args, |
656 | sizeof(struct vlan_ioctl_args))) |
657 | err = -EFAULT; |
658 | break; |
659 | |
660 | default: |
661 | err = -EOPNOTSUPP; |
662 | break; |
663 | } |
664 | out: |
665 | rtnl_unlock(); |
666 | return err; |
667 | } |
668 | |
669 | static int __net_init vlan_init_net(struct net *net) |
670 | { |
671 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
672 | int err; |
673 | |
674 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
675 | |
676 | err = vlan_proc_init(net); |
677 | |
678 | return err; |
679 | } |
680 | |
681 | static void __net_exit vlan_exit_net(struct net *net) |
682 | { |
683 | vlan_proc_cleanup(net); |
684 | } |
685 | |
686 | static struct pernet_operations vlan_net_ops = { |
687 | .init = vlan_init_net, |
688 | .exit = vlan_exit_net, |
689 | .id = &vlan_net_id, |
690 | .size = sizeof(struct vlan_net), |
691 | }; |
692 | |
693 | static int __init vlan_proto_init(void) |
694 | { |
695 | int err; |
696 | |
697 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); |
698 | pr_info("All bugs added by %s\n", vlan_buggyright); |
699 | |
700 | err = register_pernet_subsys(&vlan_net_ops); |
701 | if (err < 0) |
702 | goto err0; |
703 | |
704 | err = register_netdevice_notifier(&vlan_notifier_block); |
705 | if (err < 0) |
706 | goto err2; |
707 | |
708 | err = vlan_gvrp_init(); |
709 | if (err < 0) |
710 | goto err3; |
711 | |
712 | err = vlan_netlink_init(); |
713 | if (err < 0) |
714 | goto err4; |
715 | |
716 | dev_add_pack(&vlan_packet_type); |
717 | vlan_ioctl_set(vlan_ioctl_handler); |
718 | return 0; |
719 | |
720 | err4: |
721 | vlan_gvrp_uninit(); |
722 | err3: |
723 | unregister_netdevice_notifier(&vlan_notifier_block); |
724 | err2: |
725 | unregister_pernet_subsys(&vlan_net_ops); |
726 | err0: |
727 | return err; |
728 | } |
729 | |
730 | static void __exit vlan_cleanup_module(void) |
731 | { |
732 | unsigned int i; |
733 | |
734 | vlan_ioctl_set(NULL); |
735 | vlan_netlink_fini(); |
736 | |
737 | unregister_netdevice_notifier(&vlan_notifier_block); |
738 | |
739 | dev_remove_pack(&vlan_packet_type); |
740 | |
741 | /* This table must be empty if there are no module references left. */ |
742 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) |
743 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); |
744 | |
745 | unregister_pernet_subsys(&vlan_net_ops); |
746 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
747 | |
748 | vlan_gvrp_uninit(); |
749 | } |
750 | |
751 | module_init(vlan_proto_init); |
752 | module_exit(vlan_cleanup_module); |
753 | |
754 | MODULE_LICENSE("GPL"); |
755 | MODULE_VERSION(DRV_VERSION); |
756 |
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v2.6.34-rc5
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