Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * INET 802.1Q VLAN | |
3 | * Ethernet-type device handling. | |
4 | * | |
5 | * Authors: Ben Greear <greearb@candelatech.com> | |
ad712087 | 6 | * Please send support related email to: netdev@vger.kernel.org |
1da177e4 | 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]; | |
1da177e4 LT |
46 | |
47 | static char vlan_fullname[] = "802.1Q VLAN Support"; | |
48 | static char vlan_version[] = DRV_VERSION; | |
49 | static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
50 | static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
51 | ||
1da177e4 LT |
52 | /* Determines interface naming scheme. */ |
53 | unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; | |
54 | ||
55 | static struct packet_type vlan_packet_type = { | |
56 | .type = __constant_htons(ETH_P_8021Q), | |
57 | .func = vlan_skb_recv, /* VLAN receive method */ | |
58 | }; | |
59 | ||
1da177e4 LT |
60 | /* End of global variables definitions. */ |
61 | ||
2029cc2c PM |
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 | ||
1da177e4 LT |
67 | /* Must be invoked with RCU read lock (no preempt) */ |
68 | static struct vlan_group *__vlan_find_group(int real_dev_ifindex) | |
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_ifindex == real_dev_ifindex) | |
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, | |
87 | unsigned short VID) | |
88 | { | |
89 | struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); | |
90 | ||
91 | if (grp) | |
5c15bdec | 92 | return vlan_group_get_device(grp, VID); |
1da177e4 LT |
93 | |
94 | return NULL; | |
95 | } | |
96 | ||
5c15bdec DA |
97 | static void vlan_group_free(struct vlan_group *grp) |
98 | { | |
99 | int i; | |
100 | ||
2029cc2c | 101 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
5c15bdec DA |
102 | kfree(grp->vlan_devices_arrays[i]); |
103 | kfree(grp); | |
104 | } | |
105 | ||
42429aae PM |
106 | static struct vlan_group *vlan_group_alloc(int ifindex) |
107 | { | |
108 | struct vlan_group *grp; | |
109 | unsigned int size; | |
110 | unsigned int i; | |
111 | ||
112 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
113 | if (!grp) | |
114 | return NULL; | |
115 | ||
116 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
117 | ||
118 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { | |
119 | grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL); | |
120 | if (!grp->vlan_devices_arrays[i]) | |
121 | goto err; | |
122 | } | |
123 | ||
124 | grp->real_dev_ifindex = ifindex; | |
125 | hlist_add_head_rcu(&grp->hlist, | |
126 | &vlan_group_hash[vlan_grp_hashfn(ifindex)]); | |
127 | return grp; | |
128 | ||
129 | err: | |
130 | vlan_group_free(grp); | |
131 | return NULL; | |
132 | } | |
133 | ||
1da177e4 LT |
134 | static void vlan_rcu_free(struct rcu_head *rcu) |
135 | { | |
5c15bdec | 136 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
137 | } |
138 | ||
af301517 | 139 | void unregister_vlan_dev(struct net_device *dev) |
1da177e4 | 140 | { |
9dfebcc6 | 141 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
af301517 | 142 | struct net_device *real_dev = vlan->real_dev; |
1da177e4 | 143 | struct vlan_group *grp; |
af301517 | 144 | unsigned short vlan_id = vlan->vlan_id; |
1da177e4 LT |
145 | |
146 | ASSERT_RTNL(); | |
acc5efbc | 147 | |
af301517 PM |
148 | grp = __vlan_find_group(real_dev->ifindex); |
149 | BUG_ON(!grp); | |
acc5efbc PM |
150 | |
151 | vlan_proc_rem_dev(dev); | |
152 | ||
153 | /* Take it out of our own structures, but be sure to interlock with | |
154 | * HW accelerating devices or SW vlan input packet processing. | |
155 | */ | |
156 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
157 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); | |
1da177e4 | 158 | |
acc5efbc | 159 | vlan_group_set_device(grp, vlan_id, NULL); |
af301517 | 160 | grp->nr_vlans--; |
acc5efbc | 161 | |
af301517 | 162 | synchronize_net(); |
acc5efbc PM |
163 | |
164 | /* If the group is now empty, kill off the group. */ | |
af301517 | 165 | if (grp->nr_vlans == 0) { |
acc5efbc PM |
166 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
167 | real_dev->vlan_rx_register(real_dev, NULL); | |
168 | ||
169 | hlist_del_rcu(&grp->hlist); | |
1da177e4 | 170 | |
acc5efbc PM |
171 | /* Free the group, after all cpu's are done. */ |
172 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
173 | } |
174 | ||
af301517 PM |
175 | /* Get rid of the vlan's reference to real_dev */ |
176 | dev_put(real_dev); | |
1da177e4 | 177 | |
c17d8874 | 178 | unregister_netdevice(dev); |
1da177e4 LT |
179 | } |
180 | ||
2029cc2c PM |
181 | static void vlan_transfer_operstate(const struct net_device *dev, |
182 | struct net_device *vlandev) | |
ddd7bf9f SR |
183 | { |
184 | /* Have to respect userspace enforced dormant state | |
185 | * of real device, also must allow supplicant running | |
186 | * on VLAN device | |
187 | */ | |
188 | if (dev->operstate == IF_OPER_DORMANT) | |
189 | netif_dormant_on(vlandev); | |
190 | else | |
191 | netif_dormant_off(vlandev); | |
192 | ||
193 | if (netif_carrier_ok(dev)) { | |
194 | if (!netif_carrier_ok(vlandev)) | |
195 | netif_carrier_on(vlandev); | |
196 | } else { | |
197 | if (netif_carrier_ok(vlandev)) | |
198 | netif_carrier_off(vlandev); | |
199 | } | |
200 | } | |
201 | ||
07b5b17e | 202 | int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id) |
1da177e4 | 203 | { |
40f98e1a PM |
204 | char *name = real_dev->name; |
205 | ||
1da177e4 | 206 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 207 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 208 | return -EOPNOTSUPP; |
1da177e4 LT |
209 | } |
210 | ||
211 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && | |
d2d1acdb | 212 | !real_dev->vlan_rx_register) { |
40f98e1a | 213 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 214 | return -EOPNOTSUPP; |
1da177e4 LT |
215 | } |
216 | ||
217 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
d2d1acdb | 218 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
40f98e1a | 219 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 220 | return -EOPNOTSUPP; |
1da177e4 LT |
221 | } |
222 | ||
1da177e4 LT |
223 | /* The real device must be up and operating in order to |
224 | * assosciate a VLAN device with it. | |
225 | */ | |
226 | if (!(real_dev->flags & IFF_UP)) | |
c1d3ee99 | 227 | return -ENETDOWN; |
1da177e4 | 228 | |
40f98e1a | 229 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 230 | return -EEXIST; |
1da177e4 | 231 | |
c1d3ee99 PM |
232 | return 0; |
233 | } | |
234 | ||
07b5b17e | 235 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 236 | { |
9dfebcc6 | 237 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c PM |
238 | struct net_device *real_dev = vlan->real_dev; |
239 | unsigned short vlan_id = vlan->vlan_id; | |
240 | struct vlan_group *grp, *ngrp = NULL; | |
241 | int err; | |
242 | ||
243 | grp = __vlan_find_group(real_dev->ifindex); | |
244 | if (!grp) { | |
245 | ngrp = grp = vlan_group_alloc(real_dev->ifindex); | |
246 | if (!grp) | |
247 | return -ENOBUFS; | |
248 | } | |
249 | ||
250 | err = register_netdevice(dev); | |
251 | if (err < 0) | |
252 | goto out_free_group; | |
253 | ||
254 | /* Account for reference in struct vlan_dev_info */ | |
255 | dev_hold(real_dev); | |
256 | ||
257 | vlan_transfer_operstate(real_dev, dev); | |
258 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
259 | ||
260 | /* So, got the sucker initialized, now lets place | |
261 | * it into our local structure. | |
262 | */ | |
263 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
264 | grp->nr_vlans++; |
265 | ||
e89fe42c PM |
266 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
267 | real_dev->vlan_rx_register(real_dev, ngrp); | |
268 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
269 | real_dev->vlan_rx_add_vid(real_dev, vlan_id); | |
270 | ||
271 | if (vlan_proc_add_dev(dev) < 0) | |
40f98e1a PM |
272 | pr_warning("8021q: failed to add proc entry for %s\n", |
273 | dev->name); | |
e89fe42c PM |
274 | return 0; |
275 | ||
276 | out_free_group: | |
277 | if (ngrp) | |
278 | vlan_group_free(ngrp); | |
279 | return err; | |
280 | } | |
281 | ||
c1d3ee99 | 282 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 283 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 284 | */ |
2ae0bf69 PM |
285 | static int register_vlan_device(struct net_device *real_dev, |
286 | unsigned short VLAN_ID) | |
c1d3ee99 | 287 | { |
c1d3ee99 PM |
288 | struct net_device *new_dev; |
289 | char name[IFNAMSIZ]; | |
2ae0bf69 | 290 | int err; |
c1d3ee99 | 291 | |
c1d3ee99 | 292 | if (VLAN_ID >= VLAN_VID_MASK) |
2ae0bf69 | 293 | return -ERANGE; |
c1d3ee99 | 294 | |
2ae0bf69 PM |
295 | err = vlan_check_real_dev(real_dev, VLAN_ID); |
296 | if (err < 0) | |
297 | return err; | |
c1d3ee99 | 298 | |
1da177e4 | 299 | /* Gotta set up the fields for the device. */ |
1da177e4 LT |
300 | switch (vlan_name_type) { |
301 | case VLAN_NAME_TYPE_RAW_PLUS_VID: | |
302 | /* name will look like: eth1.0005 */ | |
303 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); | |
304 | break; | |
305 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
306 | /* Put our vlan.VID in the name. | |
307 | * Name will look like: vlan5 | |
308 | */ | |
309 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); | |
310 | break; | |
311 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
312 | /* Put our vlan.VID in the name. | |
313 | * Name will look like: eth0.5 | |
314 | */ | |
315 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); | |
316 | break; | |
317 | case VLAN_NAME_TYPE_PLUS_VID: | |
318 | /* Put our vlan.VID in the name. | |
319 | * Name will look like: vlan0005 | |
320 | */ | |
321 | default: | |
322 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); | |
3ff50b79 | 323 | } |
122952fc | 324 | |
1da177e4 LT |
325 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
326 | vlan_setup); | |
5dd8d1e9 | 327 | |
1da177e4 | 328 | if (new_dev == NULL) |
2ae0bf69 | 329 | return -ENOBUFS; |
1da177e4 | 330 | |
1da177e4 LT |
331 | /* need 4 bytes for extra VLAN header info, |
332 | * hope the underlying device can handle it. | |
333 | */ | |
334 | new_dev->mtu = real_dev->mtu; | |
335 | ||
9dfebcc6 PM |
336 | vlan_dev_info(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ |
337 | vlan_dev_info(new_dev)->real_dev = real_dev; | |
338 | vlan_dev_info(new_dev)->dent = NULL; | |
339 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 340 | |
07b5b17e | 341 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
342 | err = register_vlan_dev(new_dev); |
343 | if (err < 0) | |
e89fe42c | 344 | goto out_free_newdev; |
1da177e4 | 345 | |
2ae0bf69 | 346 | return 0; |
1da177e4 | 347 | |
1da177e4 LT |
348 | out_free_newdev: |
349 | free_netdev(new_dev); | |
2ae0bf69 | 350 | return err; |
1da177e4 LT |
351 | } |
352 | ||
8c979c26 PM |
353 | static void vlan_sync_address(struct net_device *dev, |
354 | struct net_device *vlandev) | |
355 | { | |
9dfebcc6 | 356 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
357 | |
358 | /* May be called without an actual change */ | |
359 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
360 | return; | |
361 | ||
362 | /* vlan address was different from the old address and is equal to | |
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_delete(dev, vlandev->dev_addr, ETH_ALEN); | |
367 | ||
368 | /* vlan address was equal to the old address and is different from | |
369 | * the new address */ | |
370 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
371 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
372 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); | |
373 | ||
374 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
375 | } | |
376 | ||
2029cc2c PM |
377 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
378 | void *ptr) | |
1da177e4 LT |
379 | { |
380 | struct net_device *dev = ptr; | |
381 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); | |
382 | int i, flgs; | |
383 | struct net_device *vlandev; | |
384 | ||
e9dc8653 EB |
385 | if (dev->nd_net != &init_net) |
386 | return NOTIFY_DONE; | |
387 | ||
1da177e4 LT |
388 | if (!grp) |
389 | goto out; | |
390 | ||
391 | /* It is OK that we do not hold the group lock right now, | |
392 | * as we run under the RTNL lock. | |
393 | */ | |
394 | ||
395 | switch (event) { | |
396 | case NETDEV_CHANGE: | |
397 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 398 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 399 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
400 | if (!vlandev) |
401 | continue; | |
402 | ||
ddd7bf9f | 403 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
404 | } |
405 | break; | |
406 | ||
8c979c26 PM |
407 | case NETDEV_CHANGEADDR: |
408 | /* Adjust unicast filters on underlying device */ | |
409 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
410 | vlandev = vlan_group_get_device(grp, i); | |
411 | if (!vlandev) | |
412 | continue; | |
413 | ||
d932e04a PM |
414 | flgs = vlandev->flags; |
415 | if (!(flgs & IFF_UP)) | |
416 | continue; | |
417 | ||
8c979c26 PM |
418 | vlan_sync_address(dev, vlandev); |
419 | } | |
420 | break; | |
421 | ||
1da177e4 LT |
422 | case NETDEV_DOWN: |
423 | /* Put all VLANs for this dev in the down state too. */ | |
424 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 425 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
426 | if (!vlandev) |
427 | continue; | |
428 | ||
429 | flgs = vlandev->flags; | |
430 | if (!(flgs & IFF_UP)) | |
431 | continue; | |
432 | ||
433 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
434 | } | |
435 | break; | |
436 | ||
437 | case NETDEV_UP: | |
438 | /* Put all VLANs for this dev in the up state too. */ | |
439 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 440 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
441 | if (!vlandev) |
442 | continue; | |
122952fc | 443 | |
1da177e4 LT |
444 | flgs = vlandev->flags; |
445 | if (flgs & IFF_UP) | |
446 | continue; | |
447 | ||
448 | dev_change_flags(vlandev, flgs | IFF_UP); | |
449 | } | |
450 | break; | |
122952fc | 451 | |
1da177e4 LT |
452 | case NETDEV_UNREGISTER: |
453 | /* Delete all VLANs for this dev. */ | |
454 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 455 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
456 | if (!vlandev) |
457 | continue; | |
458 | ||
af301517 PM |
459 | /* unregistration of last vlan destroys group, abort |
460 | * afterwards */ | |
461 | if (grp->nr_vlans == 1) | |
462 | i = VLAN_GROUP_ARRAY_LEN; | |
1da177e4 | 463 | |
af301517 | 464 | unregister_vlan_dev(vlandev); |
1da177e4 LT |
465 | } |
466 | break; | |
3ff50b79 | 467 | } |
1da177e4 LT |
468 | |
469 | out: | |
470 | return NOTIFY_DONE; | |
471 | } | |
472 | ||
69ab4b7d PM |
473 | static struct notifier_block vlan_notifier_block __read_mostly = { |
474 | .notifier_call = vlan_device_event, | |
475 | }; | |
476 | ||
1da177e4 LT |
477 | /* |
478 | * VLAN IOCTL handler. | |
479 | * o execute requested action or pass command to the device driver | |
480 | * arg is really a struct vlan_ioctl_args __user *. | |
481 | */ | |
881d966b | 482 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 483 | { |
c17d8874 | 484 | int err; |
1da177e4 LT |
485 | unsigned short vid = 0; |
486 | struct vlan_ioctl_args args; | |
c17d8874 | 487 | struct net_device *dev = NULL; |
1da177e4 LT |
488 | |
489 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
490 | return -EFAULT; | |
491 | ||
492 | /* Null terminate this sucker, just in case. */ | |
493 | args.device1[23] = 0; | |
494 | args.u.device2[23] = 0; | |
495 | ||
c17d8874 PM |
496 | rtnl_lock(); |
497 | ||
1da177e4 LT |
498 | switch (args.cmd) { |
499 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
500 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
501 | case SET_VLAN_FLAG_CMD: | |
502 | case ADD_VLAN_CMD: | |
503 | case DEL_VLAN_CMD: | |
504 | case GET_VLAN_REALDEV_NAME_CMD: | |
505 | case GET_VLAN_VID_CMD: | |
506 | err = -ENODEV; | |
881d966b | 507 | dev = __dev_get_by_name(&init_net, args.device1); |
c17d8874 PM |
508 | if (!dev) |
509 | goto out; | |
510 | ||
511 | err = -EINVAL; | |
512 | if (args.cmd != ADD_VLAN_CMD && | |
513 | !(dev->priv_flags & IFF_802_1Q_VLAN)) | |
514 | goto out; | |
515 | } | |
516 | ||
517 | switch (args.cmd) { | |
518 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
519 | err = -EPERM; | |
1da177e4 | 520 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
521 | break; |
522 | vlan_dev_set_ingress_priority(dev, | |
523 | args.u.skb_priority, | |
524 | args.vlan_qos); | |
fffe470a | 525 | err = 0; |
1da177e4 LT |
526 | break; |
527 | ||
528 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 529 | err = -EPERM; |
1da177e4 | 530 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
531 | break; |
532 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
533 | args.u.skb_priority, |
534 | args.vlan_qos); | |
535 | break; | |
536 | ||
537 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 538 | err = -EPERM; |
1da177e4 | 539 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
540 | break; |
541 | err = vlan_dev_set_vlan_flag(dev, | |
1da177e4 LT |
542 | args.u.flag, |
543 | args.vlan_qos); | |
544 | break; | |
545 | ||
546 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 547 | err = -EPERM; |
1da177e4 | 548 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 549 | break; |
c17d8874 PM |
550 | if ((args.u.name_type >= 0) && |
551 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
1da177e4 LT |
552 | vlan_name_type = args.u.name_type; |
553 | err = 0; | |
554 | } else { | |
555 | err = -EINVAL; | |
556 | } | |
557 | break; | |
558 | ||
559 | case ADD_VLAN_CMD: | |
c17d8874 | 560 | err = -EPERM; |
1da177e4 | 561 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 562 | break; |
2ae0bf69 | 563 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
564 | break; |
565 | ||
566 | case DEL_VLAN_CMD: | |
c17d8874 | 567 | err = -EPERM; |
1da177e4 | 568 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 569 | break; |
af301517 PM |
570 | unregister_vlan_dev(dev); |
571 | err = 0; | |
1da177e4 LT |
572 | break; |
573 | ||
1da177e4 | 574 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 575 | err = 0; |
c17d8874 | 576 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 577 | if (copy_to_user(arg, &args, |
2029cc2c | 578 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 579 | err = -EFAULT; |
1da177e4 LT |
580 | break; |
581 | ||
582 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 583 | err = 0; |
c17d8874 | 584 | vlan_dev_get_vid(dev, &vid); |
1da177e4 LT |
585 | args.u.VID = vid; |
586 | if (copy_to_user(arg, &args, | |
2029cc2c | 587 | sizeof(struct vlan_ioctl_args))) |
122952fc | 588 | err = -EFAULT; |
1da177e4 LT |
589 | break; |
590 | ||
591 | default: | |
198a291c | 592 | err = -EOPNOTSUPP; |
c17d8874 | 593 | break; |
3ff50b79 | 594 | } |
7eb1b3d3 | 595 | out: |
c17d8874 | 596 | rtnl_unlock(); |
1da177e4 LT |
597 | return err; |
598 | } | |
599 | ||
69ab4b7d PM |
600 | static int __init vlan_proto_init(void) |
601 | { | |
602 | int err; | |
603 | ||
604 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
605 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
606 | ||
607 | err = vlan_proc_init(); | |
608 | if (err < 0) | |
609 | goto err1; | |
610 | ||
611 | err = register_netdevice_notifier(&vlan_notifier_block); | |
612 | if (err < 0) | |
613 | goto err2; | |
614 | ||
615 | err = vlan_netlink_init(); | |
616 | if (err < 0) | |
617 | goto err3; | |
618 | ||
619 | dev_add_pack(&vlan_packet_type); | |
620 | vlan_ioctl_set(vlan_ioctl_handler); | |
621 | return 0; | |
622 | ||
623 | err3: | |
624 | unregister_netdevice_notifier(&vlan_notifier_block); | |
625 | err2: | |
626 | vlan_proc_cleanup(); | |
627 | err1: | |
628 | return err; | |
629 | } | |
630 | ||
631 | static void __exit vlan_cleanup_module(void) | |
632 | { | |
633 | unsigned int i; | |
634 | ||
635 | vlan_ioctl_set(NULL); | |
636 | vlan_netlink_fini(); | |
637 | ||
638 | unregister_netdevice_notifier(&vlan_notifier_block); | |
639 | ||
640 | dev_remove_pack(&vlan_packet_type); | |
641 | ||
642 | /* This table must be empty if there are no module references left. */ | |
643 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) | |
644 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
645 | ||
646 | vlan_proc_cleanup(); | |
647 | ||
648 | synchronize_net(); | |
649 | } | |
650 | ||
651 | module_init(vlan_proto_init); | |
652 | module_exit(vlan_cleanup_module); | |
653 | ||
1da177e4 LT |
654 | MODULE_LICENSE("GPL"); |
655 | MODULE_VERSION(DRV_VERSION); |