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