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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> | |
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 | ||
1da177e4 LT |
53 | /* Determines interface naming scheme. */ |
54 | unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; | |
55 | ||
56 | static struct packet_type vlan_packet_type = { | |
57 | .type = __constant_htons(ETH_P_8021Q), | |
58 | .func = vlan_skb_recv, /* VLAN receive method */ | |
59 | }; | |
60 | ||
1da177e4 LT |
61 | /* End of global variables definitions. */ |
62 | ||
1da177e4 LT |
63 | /* Must be invoked with RCU read lock (no preempt) */ |
64 | static struct vlan_group *__vlan_find_group(int real_dev_ifindex) | |
65 | { | |
66 | struct vlan_group *grp; | |
67 | struct hlist_node *n; | |
68 | int hash = vlan_grp_hashfn(real_dev_ifindex); | |
69 | ||
70 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { | |
71 | if (grp->real_dev_ifindex == real_dev_ifindex) | |
72 | return grp; | |
73 | } | |
74 | ||
75 | return NULL; | |
76 | } | |
77 | ||
78 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. | |
79 | * | |
80 | * Must be invoked with RCU read lock (no preempt) | |
81 | */ | |
82 | struct net_device *__find_vlan_dev(struct net_device *real_dev, | |
83 | unsigned short VID) | |
84 | { | |
85 | struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); | |
86 | ||
87 | if (grp) | |
5c15bdec | 88 | return vlan_group_get_device(grp, VID); |
1da177e4 LT |
89 | |
90 | return NULL; | |
91 | } | |
92 | ||
5c15bdec DA |
93 | static void vlan_group_free(struct vlan_group *grp) |
94 | { | |
95 | int i; | |
96 | ||
97 | for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) | |
98 | kfree(grp->vlan_devices_arrays[i]); | |
99 | kfree(grp); | |
100 | } | |
101 | ||
42429aae PM |
102 | static struct vlan_group *vlan_group_alloc(int ifindex) |
103 | { | |
104 | struct vlan_group *grp; | |
105 | unsigned int size; | |
106 | unsigned int i; | |
107 | ||
108 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
109 | if (!grp) | |
110 | return NULL; | |
111 | ||
112 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
113 | ||
114 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { | |
115 | grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL); | |
116 | if (!grp->vlan_devices_arrays[i]) | |
117 | goto err; | |
118 | } | |
119 | ||
120 | grp->real_dev_ifindex = ifindex; | |
121 | hlist_add_head_rcu(&grp->hlist, | |
122 | &vlan_group_hash[vlan_grp_hashfn(ifindex)]); | |
123 | return grp; | |
124 | ||
125 | err: | |
126 | vlan_group_free(grp); | |
127 | return NULL; | |
128 | } | |
129 | ||
1da177e4 LT |
130 | static void vlan_rcu_free(struct rcu_head *rcu) |
131 | { | |
5c15bdec | 132 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
133 | } |
134 | ||
af301517 | 135 | void unregister_vlan_dev(struct net_device *dev) |
1da177e4 | 136 | { |
af301517 PM |
137 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); |
138 | struct net_device *real_dev = vlan->real_dev; | |
1da177e4 | 139 | struct vlan_group *grp; |
af301517 | 140 | unsigned short vlan_id = vlan->vlan_id; |
1da177e4 LT |
141 | |
142 | ASSERT_RTNL(); | |
acc5efbc | 143 | |
af301517 PM |
144 | grp = __vlan_find_group(real_dev->ifindex); |
145 | BUG_ON(!grp); | |
acc5efbc PM |
146 | |
147 | vlan_proc_rem_dev(dev); | |
148 | ||
149 | /* Take it out of our own structures, but be sure to interlock with | |
150 | * HW accelerating devices or SW vlan input packet processing. | |
151 | */ | |
152 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
153 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); | |
1da177e4 | 154 | |
acc5efbc | 155 | vlan_group_set_device(grp, vlan_id, NULL); |
af301517 | 156 | grp->nr_vlans--; |
acc5efbc | 157 | |
af301517 | 158 | synchronize_net(); |
acc5efbc PM |
159 | |
160 | /* If the group is now empty, kill off the group. */ | |
af301517 | 161 | if (grp->nr_vlans == 0) { |
acc5efbc PM |
162 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
163 | real_dev->vlan_rx_register(real_dev, NULL); | |
164 | ||
165 | hlist_del_rcu(&grp->hlist); | |
1da177e4 | 166 | |
acc5efbc PM |
167 | /* Free the group, after all cpu's are done. */ |
168 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
169 | } |
170 | ||
af301517 PM |
171 | /* Get rid of the vlan's reference to real_dev */ |
172 | dev_put(real_dev); | |
1da177e4 | 173 | |
c17d8874 | 174 | unregister_netdevice(dev); |
1da177e4 LT |
175 | } |
176 | ||
ddd7bf9f SR |
177 | static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) |
178 | { | |
179 | /* Have to respect userspace enforced dormant state | |
180 | * of real device, also must allow supplicant running | |
181 | * on VLAN device | |
182 | */ | |
183 | if (dev->operstate == IF_OPER_DORMANT) | |
184 | netif_dormant_on(vlandev); | |
185 | else | |
186 | netif_dormant_off(vlandev); | |
187 | ||
188 | if (netif_carrier_ok(dev)) { | |
189 | if (!netif_carrier_ok(vlandev)) | |
190 | netif_carrier_on(vlandev); | |
191 | } else { | |
192 | if (netif_carrier_ok(vlandev)) | |
193 | netif_carrier_off(vlandev); | |
194 | } | |
195 | } | |
196 | ||
07b5b17e | 197 | int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id) |
1da177e4 | 198 | { |
40f98e1a PM |
199 | char *name = real_dev->name; |
200 | ||
1da177e4 | 201 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 202 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 203 | return -EOPNOTSUPP; |
1da177e4 LT |
204 | } |
205 | ||
206 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && | |
d2d1acdb | 207 | !real_dev->vlan_rx_register) { |
40f98e1a | 208 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 209 | return -EOPNOTSUPP; |
1da177e4 LT |
210 | } |
211 | ||
212 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
d2d1acdb | 213 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
40f98e1a | 214 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 215 | return -EOPNOTSUPP; |
1da177e4 LT |
216 | } |
217 | ||
1da177e4 LT |
218 | /* The real device must be up and operating in order to |
219 | * assosciate a VLAN device with it. | |
220 | */ | |
221 | if (!(real_dev->flags & IFF_UP)) | |
c1d3ee99 | 222 | return -ENETDOWN; |
1da177e4 | 223 | |
40f98e1a | 224 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 225 | return -EEXIST; |
1da177e4 | 226 | |
c1d3ee99 PM |
227 | return 0; |
228 | } | |
229 | ||
07b5b17e | 230 | int register_vlan_dev(struct net_device *dev) |
e89fe42c PM |
231 | { |
232 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); | |
233 | struct net_device *real_dev = vlan->real_dev; | |
234 | unsigned short vlan_id = vlan->vlan_id; | |
235 | struct vlan_group *grp, *ngrp = NULL; | |
236 | int err; | |
237 | ||
238 | grp = __vlan_find_group(real_dev->ifindex); | |
239 | if (!grp) { | |
240 | ngrp = grp = vlan_group_alloc(real_dev->ifindex); | |
241 | if (!grp) | |
242 | return -ENOBUFS; | |
243 | } | |
244 | ||
245 | err = register_netdevice(dev); | |
246 | if (err < 0) | |
247 | goto out_free_group; | |
248 | ||
249 | /* Account for reference in struct vlan_dev_info */ | |
250 | dev_hold(real_dev); | |
251 | ||
252 | vlan_transfer_operstate(real_dev, dev); | |
253 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
254 | ||
255 | /* So, got the sucker initialized, now lets place | |
256 | * it into our local structure. | |
257 | */ | |
258 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
259 | grp->nr_vlans++; |
260 | ||
e89fe42c PM |
261 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
262 | real_dev->vlan_rx_register(real_dev, ngrp); | |
263 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
264 | real_dev->vlan_rx_add_vid(real_dev, vlan_id); | |
265 | ||
266 | if (vlan_proc_add_dev(dev) < 0) | |
40f98e1a PM |
267 | pr_warning("8021q: failed to add proc entry for %s\n", |
268 | dev->name); | |
e89fe42c PM |
269 | return 0; |
270 | ||
271 | out_free_group: | |
272 | if (ngrp) | |
273 | vlan_group_free(ngrp); | |
274 | return err; | |
275 | } | |
276 | ||
c1d3ee99 | 277 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 278 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 279 | */ |
2ae0bf69 PM |
280 | static int register_vlan_device(struct net_device *real_dev, |
281 | unsigned short VLAN_ID) | |
c1d3ee99 | 282 | { |
c1d3ee99 PM |
283 | struct net_device *new_dev; |
284 | char name[IFNAMSIZ]; | |
2ae0bf69 | 285 | int err; |
c1d3ee99 | 286 | |
c1d3ee99 | 287 | if (VLAN_ID >= VLAN_VID_MASK) |
2ae0bf69 | 288 | return -ERANGE; |
c1d3ee99 | 289 | |
2ae0bf69 PM |
290 | err = vlan_check_real_dev(real_dev, VLAN_ID); |
291 | if (err < 0) | |
292 | return err; | |
c1d3ee99 | 293 | |
1da177e4 | 294 | /* Gotta set up the fields for the device. */ |
1da177e4 LT |
295 | switch (vlan_name_type) { |
296 | case VLAN_NAME_TYPE_RAW_PLUS_VID: | |
297 | /* name will look like: eth1.0005 */ | |
298 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); | |
299 | break; | |
300 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
301 | /* Put our vlan.VID in the name. | |
302 | * Name will look like: vlan5 | |
303 | */ | |
304 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); | |
305 | break; | |
306 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
307 | /* Put our vlan.VID in the name. | |
308 | * Name will look like: eth0.5 | |
309 | */ | |
310 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); | |
311 | break; | |
312 | case VLAN_NAME_TYPE_PLUS_VID: | |
313 | /* Put our vlan.VID in the name. | |
314 | * Name will look like: vlan0005 | |
315 | */ | |
316 | default: | |
317 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); | |
3ff50b79 | 318 | } |
122952fc | 319 | |
1da177e4 LT |
320 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
321 | vlan_setup); | |
5dd8d1e9 | 322 | |
1da177e4 | 323 | if (new_dev == NULL) |
2ae0bf69 | 324 | return -ENOBUFS; |
1da177e4 | 325 | |
1da177e4 LT |
326 | /* need 4 bytes for extra VLAN header info, |
327 | * hope the underlying device can handle it. | |
328 | */ | |
329 | new_dev->mtu = real_dev->mtu; | |
330 | ||
1da177e4 LT |
331 | VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ |
332 | VLAN_DEV_INFO(new_dev)->real_dev = real_dev; | |
333 | VLAN_DEV_INFO(new_dev)->dent = NULL; | |
a4bf3af4 | 334 | VLAN_DEV_INFO(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
1da177e4 | 335 | |
07b5b17e | 336 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
337 | err = register_vlan_dev(new_dev); |
338 | if (err < 0) | |
e89fe42c | 339 | goto out_free_newdev; |
1da177e4 | 340 | |
2ae0bf69 | 341 | return 0; |
1da177e4 | 342 | |
1da177e4 LT |
343 | out_free_newdev: |
344 | free_netdev(new_dev); | |
2ae0bf69 | 345 | return err; |
1da177e4 LT |
346 | } |
347 | ||
8c979c26 PM |
348 | static void vlan_sync_address(struct net_device *dev, |
349 | struct net_device *vlandev) | |
350 | { | |
351 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(vlandev); | |
352 | ||
353 | /* May be called without an actual change */ | |
354 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
355 | return; | |
356 | ||
357 | /* vlan address was different from the old address and is equal to | |
358 | * the new address */ | |
359 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
360 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
361 | dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); | |
362 | ||
363 | /* vlan address was equal to the old address and is different from | |
364 | * the new address */ | |
365 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
366 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
367 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); | |
368 | ||
369 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
370 | } | |
371 | ||
1da177e4 LT |
372 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) |
373 | { | |
374 | struct net_device *dev = ptr; | |
375 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); | |
376 | int i, flgs; | |
377 | struct net_device *vlandev; | |
378 | ||
e9dc8653 EB |
379 | if (dev->nd_net != &init_net) |
380 | return NOTIFY_DONE; | |
381 | ||
1da177e4 LT |
382 | if (!grp) |
383 | goto out; | |
384 | ||
385 | /* It is OK that we do not hold the group lock right now, | |
386 | * as we run under the RTNL lock. | |
387 | */ | |
388 | ||
389 | switch (event) { | |
390 | case NETDEV_CHANGE: | |
391 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 392 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 393 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
394 | if (!vlandev) |
395 | continue; | |
396 | ||
ddd7bf9f | 397 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
398 | } |
399 | break; | |
400 | ||
8c979c26 PM |
401 | case NETDEV_CHANGEADDR: |
402 | /* Adjust unicast filters on underlying device */ | |
403 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
404 | vlandev = vlan_group_get_device(grp, i); | |
405 | if (!vlandev) | |
406 | continue; | |
407 | ||
d932e04a PM |
408 | flgs = vlandev->flags; |
409 | if (!(flgs & IFF_UP)) | |
410 | continue; | |
411 | ||
8c979c26 PM |
412 | vlan_sync_address(dev, vlandev); |
413 | } | |
414 | break; | |
415 | ||
1da177e4 LT |
416 | case NETDEV_DOWN: |
417 | /* Put all VLANs for this dev in the down state too. */ | |
418 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 419 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
420 | if (!vlandev) |
421 | continue; | |
422 | ||
423 | flgs = vlandev->flags; | |
424 | if (!(flgs & IFF_UP)) | |
425 | continue; | |
426 | ||
427 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
428 | } | |
429 | break; | |
430 | ||
431 | case NETDEV_UP: | |
432 | /* Put all VLANs for this dev in the up state too. */ | |
433 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 434 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
435 | if (!vlandev) |
436 | continue; | |
122952fc | 437 | |
1da177e4 LT |
438 | flgs = vlandev->flags; |
439 | if (flgs & IFF_UP) | |
440 | continue; | |
441 | ||
442 | dev_change_flags(vlandev, flgs | IFF_UP); | |
443 | } | |
444 | break; | |
122952fc | 445 | |
1da177e4 LT |
446 | case NETDEV_UNREGISTER: |
447 | /* Delete all VLANs for this dev. */ | |
448 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 449 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
450 | if (!vlandev) |
451 | continue; | |
452 | ||
af301517 PM |
453 | /* unregistration of last vlan destroys group, abort |
454 | * afterwards */ | |
455 | if (grp->nr_vlans == 1) | |
456 | i = VLAN_GROUP_ARRAY_LEN; | |
1da177e4 | 457 | |
af301517 | 458 | unregister_vlan_dev(vlandev); |
1da177e4 LT |
459 | } |
460 | break; | |
3ff50b79 | 461 | } |
1da177e4 LT |
462 | |
463 | out: | |
464 | return NOTIFY_DONE; | |
465 | } | |
466 | ||
69ab4b7d PM |
467 | static struct notifier_block vlan_notifier_block __read_mostly = { |
468 | .notifier_call = vlan_device_event, | |
469 | }; | |
470 | ||
1da177e4 LT |
471 | /* |
472 | * VLAN IOCTL handler. | |
473 | * o execute requested action or pass command to the device driver | |
474 | * arg is really a struct vlan_ioctl_args __user *. | |
475 | */ | |
881d966b | 476 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 477 | { |
c17d8874 | 478 | int err; |
1da177e4 LT |
479 | unsigned short vid = 0; |
480 | struct vlan_ioctl_args args; | |
c17d8874 | 481 | struct net_device *dev = NULL; |
1da177e4 LT |
482 | |
483 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
484 | return -EFAULT; | |
485 | ||
486 | /* Null terminate this sucker, just in case. */ | |
487 | args.device1[23] = 0; | |
488 | args.u.device2[23] = 0; | |
489 | ||
c17d8874 PM |
490 | rtnl_lock(); |
491 | ||
1da177e4 LT |
492 | switch (args.cmd) { |
493 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
494 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
495 | case SET_VLAN_FLAG_CMD: | |
496 | case ADD_VLAN_CMD: | |
497 | case DEL_VLAN_CMD: | |
498 | case GET_VLAN_REALDEV_NAME_CMD: | |
499 | case GET_VLAN_VID_CMD: | |
500 | err = -ENODEV; | |
881d966b | 501 | dev = __dev_get_by_name(&init_net, args.device1); |
c17d8874 PM |
502 | if (!dev) |
503 | goto out; | |
504 | ||
505 | err = -EINVAL; | |
506 | if (args.cmd != ADD_VLAN_CMD && | |
507 | !(dev->priv_flags & IFF_802_1Q_VLAN)) | |
508 | goto out; | |
509 | } | |
510 | ||
511 | switch (args.cmd) { | |
512 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
513 | err = -EPERM; | |
1da177e4 | 514 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
515 | break; |
516 | vlan_dev_set_ingress_priority(dev, | |
517 | args.u.skb_priority, | |
518 | args.vlan_qos); | |
fffe470a | 519 | err = 0; |
1da177e4 LT |
520 | break; |
521 | ||
522 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 523 | err = -EPERM; |
1da177e4 | 524 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
525 | break; |
526 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
527 | args.u.skb_priority, |
528 | args.vlan_qos); | |
529 | break; | |
530 | ||
531 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 532 | err = -EPERM; |
1da177e4 | 533 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
534 | break; |
535 | err = vlan_dev_set_vlan_flag(dev, | |
1da177e4 LT |
536 | args.u.flag, |
537 | args.vlan_qos); | |
538 | break; | |
539 | ||
540 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 541 | err = -EPERM; |
1da177e4 | 542 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 543 | break; |
c17d8874 PM |
544 | if ((args.u.name_type >= 0) && |
545 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
1da177e4 LT |
546 | vlan_name_type = args.u.name_type; |
547 | err = 0; | |
548 | } else { | |
549 | err = -EINVAL; | |
550 | } | |
551 | break; | |
552 | ||
553 | case ADD_VLAN_CMD: | |
c17d8874 | 554 | err = -EPERM; |
1da177e4 | 555 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 556 | break; |
2ae0bf69 | 557 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
558 | break; |
559 | ||
560 | case DEL_VLAN_CMD: | |
c17d8874 | 561 | err = -EPERM; |
1da177e4 | 562 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 563 | break; |
af301517 PM |
564 | unregister_vlan_dev(dev); |
565 | err = 0; | |
1da177e4 LT |
566 | break; |
567 | ||
1da177e4 | 568 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 569 | err = 0; |
c17d8874 | 570 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 LT |
571 | if (copy_to_user(arg, &args, |
572 | sizeof(struct vlan_ioctl_args))) { | |
573 | err = -EFAULT; | |
574 | } | |
575 | break; | |
576 | ||
577 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 578 | err = 0; |
c17d8874 | 579 | vlan_dev_get_vid(dev, &vid); |
1da177e4 LT |
580 | args.u.VID = vid; |
581 | if (copy_to_user(arg, &args, | |
582 | sizeof(struct vlan_ioctl_args))) { | |
122952fc | 583 | err = -EFAULT; |
1da177e4 LT |
584 | } |
585 | break; | |
586 | ||
587 | default: | |
198a291c | 588 | err = -EOPNOTSUPP; |
c17d8874 | 589 | break; |
3ff50b79 | 590 | } |
7eb1b3d3 | 591 | out: |
c17d8874 | 592 | rtnl_unlock(); |
1da177e4 LT |
593 | return err; |
594 | } | |
595 | ||
69ab4b7d PM |
596 | static int __init vlan_proto_init(void) |
597 | { | |
598 | int err; | |
599 | ||
600 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
601 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
602 | ||
603 | err = vlan_proc_init(); | |
604 | if (err < 0) | |
605 | goto err1; | |
606 | ||
607 | err = register_netdevice_notifier(&vlan_notifier_block); | |
608 | if (err < 0) | |
609 | goto err2; | |
610 | ||
611 | err = vlan_netlink_init(); | |
612 | if (err < 0) | |
613 | goto err3; | |
614 | ||
615 | dev_add_pack(&vlan_packet_type); | |
616 | vlan_ioctl_set(vlan_ioctl_handler); | |
617 | return 0; | |
618 | ||
619 | err3: | |
620 | unregister_netdevice_notifier(&vlan_notifier_block); | |
621 | err2: | |
622 | vlan_proc_cleanup(); | |
623 | err1: | |
624 | return err; | |
625 | } | |
626 | ||
627 | static void __exit vlan_cleanup_module(void) | |
628 | { | |
629 | unsigned int i; | |
630 | ||
631 | vlan_ioctl_set(NULL); | |
632 | vlan_netlink_fini(); | |
633 | ||
634 | unregister_netdevice_notifier(&vlan_notifier_block); | |
635 | ||
636 | dev_remove_pack(&vlan_packet_type); | |
637 | ||
638 | /* This table must be empty if there are no module references left. */ | |
639 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) | |
640 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
641 | ||
642 | vlan_proc_cleanup(); | |
643 | ||
644 | synchronize_net(); | |
645 | } | |
646 | ||
647 | module_init(vlan_proto_init); | |
648 | module_exit(vlan_cleanup_module); | |
649 | ||
1da177e4 LT |
650 | MODULE_LICENSE("GPL"); |
651 | MODULE_VERSION(DRV_VERSION); |