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 | ||
4fc268d2 | 21 | #include <linux/capability.h> |
1da177e4 LT |
22 | #include <linux/module.h> |
23 | #include <linux/netdevice.h> | |
24 | #include <linux/skbuff.h> | |
1da177e4 | 25 | #include <linux/init.h> |
82524746 | 26 | #include <linux/rculist.h> |
1da177e4 LT |
27 | #include <net/p8022.h> |
28 | #include <net/arp.h> | |
29 | #include <linux/rtnetlink.h> | |
30 | #include <linux/notifier.h> | |
61362766 | 31 | #include <net/rtnetlink.h> |
e9dc8653 | 32 | #include <net/net_namespace.h> |
d9ed0f0e | 33 | #include <net/netns/generic.h> |
61362766 | 34 | #include <asm/uaccess.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 | ||
d9ed0f0e PE |
44 | int vlan_net_id; |
45 | ||
1da177e4 LT |
46 | /* Our listing of VLAN group(s) */ |
47 | static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; | |
1da177e4 LT |
48 | |
49 | static char vlan_fullname[] = "802.1Q VLAN Support"; | |
50 | static char vlan_version[] = DRV_VERSION; | |
51 | static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
52 | static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
53 | ||
1da177e4 LT |
54 | static struct packet_type vlan_packet_type = { |
55 | .type = __constant_htons(ETH_P_8021Q), | |
56 | .func = vlan_skb_recv, /* VLAN receive method */ | |
57 | }; | |
58 | ||
1da177e4 LT |
59 | /* End of global variables definitions. */ |
60 | ||
2029cc2c PM |
61 | static inline unsigned int vlan_grp_hashfn(unsigned int idx) |
62 | { | |
63 | return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK; | |
64 | } | |
65 | ||
1da177e4 | 66 | /* Must be invoked with RCU read lock (no preempt) */ |
a9fde260 | 67 | static struct vlan_group *__vlan_find_group(struct net_device *real_dev) |
1da177e4 LT |
68 | { |
69 | struct vlan_group *grp; | |
70 | struct hlist_node *n; | |
a9fde260 | 71 | int hash = vlan_grp_hashfn(real_dev->ifindex); |
1da177e4 LT |
72 | |
73 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { | |
a9fde260 | 74 | if (grp->real_dev == real_dev) |
1da177e4 LT |
75 | return grp; |
76 | } | |
77 | ||
78 | return NULL; | |
79 | } | |
80 | ||
81 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. | |
82 | * | |
83 | * Must be invoked with RCU read lock (no preempt) | |
84 | */ | |
9bb8582e | 85 | struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 86 | { |
a9fde260 | 87 | struct vlan_group *grp = __vlan_find_group(real_dev); |
1da177e4 LT |
88 | |
89 | if (grp) | |
9bb8582e | 90 | return vlan_group_get_device(grp, vlan_id); |
1da177e4 LT |
91 | |
92 | return NULL; | |
93 | } | |
94 | ||
5c15bdec DA |
95 | static void vlan_group_free(struct vlan_group *grp) |
96 | { | |
97 | int i; | |
98 | ||
2029cc2c | 99 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
5c15bdec DA |
100 | kfree(grp->vlan_devices_arrays[i]); |
101 | kfree(grp); | |
102 | } | |
103 | ||
a9fde260 | 104 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
42429aae PM |
105 | { |
106 | struct vlan_group *grp; | |
42429aae PM |
107 | |
108 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
109 | if (!grp) | |
110 | return NULL; | |
111 | ||
a9fde260 | 112 | grp->real_dev = real_dev; |
42429aae | 113 | hlist_add_head_rcu(&grp->hlist, |
a9fde260 | 114 | &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); |
42429aae | 115 | return grp; |
67727184 | 116 | } |
42429aae | 117 | |
9bb8582e | 118 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
67727184 PE |
119 | { |
120 | struct net_device **array; | |
121 | unsigned int size; | |
122 | ||
123 | ASSERT_RTNL(); | |
124 | ||
9bb8582e | 125 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
67727184 PE |
126 | if (array != NULL) |
127 | return 0; | |
128 | ||
129 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
130 | array = kzalloc(size, GFP_KERNEL); | |
131 | if (array == NULL) | |
132 | return -ENOBUFS; | |
133 | ||
9bb8582e | 134 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
67727184 | 135 | return 0; |
42429aae PM |
136 | } |
137 | ||
1da177e4 LT |
138 | static void vlan_rcu_free(struct rcu_head *rcu) |
139 | { | |
5c15bdec | 140 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
141 | } |
142 | ||
af301517 | 143 | void unregister_vlan_dev(struct net_device *dev) |
1da177e4 | 144 | { |
9dfebcc6 | 145 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
af301517 | 146 | struct net_device *real_dev = vlan->real_dev; |
1da177e4 | 147 | struct vlan_group *grp; |
9bb8582e | 148 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
149 | |
150 | ASSERT_RTNL(); | |
acc5efbc | 151 | |
a9fde260 | 152 | grp = __vlan_find_group(real_dev); |
af301517 | 153 | BUG_ON(!grp); |
acc5efbc | 154 | |
acc5efbc PM |
155 | /* Take it out of our own structures, but be sure to interlock with |
156 | * HW accelerating devices or SW vlan input packet processing. | |
157 | */ | |
158 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
159 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); | |
1da177e4 | 160 | |
acc5efbc | 161 | vlan_group_set_device(grp, vlan_id, NULL); |
af301517 | 162 | grp->nr_vlans--; |
acc5efbc | 163 | |
af301517 | 164 | synchronize_net(); |
acc5efbc | 165 | |
ce305002 PM |
166 | unregister_netdevice(dev); |
167 | ||
acc5efbc | 168 | /* If the group is now empty, kill off the group. */ |
af301517 | 169 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
170 | vlan_gvrp_uninit_applicant(real_dev); |
171 | ||
acc5efbc PM |
172 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
173 | real_dev->vlan_rx_register(real_dev, NULL); | |
174 | ||
175 | hlist_del_rcu(&grp->hlist); | |
1da177e4 | 176 | |
acc5efbc PM |
177 | /* Free the group, after all cpu's are done. */ |
178 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
179 | } |
180 | ||
af301517 PM |
181 | /* Get rid of the vlan's reference to real_dev */ |
182 | dev_put(real_dev); | |
1da177e4 LT |
183 | } |
184 | ||
2029cc2c PM |
185 | static void vlan_transfer_operstate(const struct net_device *dev, |
186 | struct net_device *vlandev) | |
ddd7bf9f SR |
187 | { |
188 | /* Have to respect userspace enforced dormant state | |
189 | * of real device, also must allow supplicant running | |
190 | * on VLAN device | |
191 | */ | |
192 | if (dev->operstate == IF_OPER_DORMANT) | |
193 | netif_dormant_on(vlandev); | |
194 | else | |
195 | netif_dormant_off(vlandev); | |
196 | ||
197 | if (netif_carrier_ok(dev)) { | |
198 | if (!netif_carrier_ok(vlandev)) | |
199 | netif_carrier_on(vlandev); | |
200 | } else { | |
201 | if (netif_carrier_ok(vlandev)) | |
202 | netif_carrier_off(vlandev); | |
203 | } | |
204 | } | |
205 | ||
9bb8582e | 206 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 207 | { |
40f98e1a PM |
208 | char *name = real_dev->name; |
209 | ||
1da177e4 | 210 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 211 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 212 | return -EOPNOTSUPP; |
1da177e4 LT |
213 | } |
214 | ||
215 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && | |
d2d1acdb | 216 | !real_dev->vlan_rx_register) { |
40f98e1a | 217 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 218 | return -EOPNOTSUPP; |
1da177e4 LT |
219 | } |
220 | ||
221 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
d2d1acdb | 222 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
40f98e1a | 223 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 224 | return -EOPNOTSUPP; |
1da177e4 LT |
225 | } |
226 | ||
1da177e4 LT |
227 | /* The real device must be up and operating in order to |
228 | * assosciate a VLAN device with it. | |
229 | */ | |
230 | if (!(real_dev->flags & IFF_UP)) | |
c1d3ee99 | 231 | return -ENETDOWN; |
1da177e4 | 232 | |
40f98e1a | 233 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 234 | return -EEXIST; |
1da177e4 | 235 | |
c1d3ee99 PM |
236 | return 0; |
237 | } | |
238 | ||
07b5b17e | 239 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 240 | { |
9dfebcc6 | 241 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 242 | struct net_device *real_dev = vlan->real_dev; |
9bb8582e | 243 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
244 | struct vlan_group *grp, *ngrp = NULL; |
245 | int err; | |
246 | ||
a9fde260 | 247 | grp = __vlan_find_group(real_dev); |
e89fe42c | 248 | if (!grp) { |
a9fde260 | 249 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
250 | if (!grp) |
251 | return -ENOBUFS; | |
70c03b49 PM |
252 | err = vlan_gvrp_init_applicant(real_dev); |
253 | if (err < 0) | |
254 | goto out_free_group; | |
e89fe42c PM |
255 | } |
256 | ||
67727184 PE |
257 | err = vlan_group_prealloc_vid(grp, vlan_id); |
258 | if (err < 0) | |
70c03b49 | 259 | goto out_uninit_applicant; |
67727184 | 260 | |
e89fe42c PM |
261 | err = register_netdevice(dev); |
262 | if (err < 0) | |
70c03b49 | 263 | goto out_uninit_applicant; |
e89fe42c PM |
264 | |
265 | /* Account for reference in struct vlan_dev_info */ | |
266 | dev_hold(real_dev); | |
267 | ||
268 | vlan_transfer_operstate(real_dev, dev); | |
269 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
270 | ||
271 | /* So, got the sucker initialized, now lets place | |
272 | * it into our local structure. | |
273 | */ | |
274 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
275 | grp->nr_vlans++; |
276 | ||
e89fe42c PM |
277 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
278 | real_dev->vlan_rx_register(real_dev, ngrp); | |
279 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
280 | real_dev->vlan_rx_add_vid(real_dev, vlan_id); | |
281 | ||
e89fe42c PM |
282 | return 0; |
283 | ||
70c03b49 PM |
284 | out_uninit_applicant: |
285 | if (ngrp) | |
286 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c PM |
287 | out_free_group: |
288 | if (ngrp) | |
289 | vlan_group_free(ngrp); | |
290 | return err; | |
291 | } | |
292 | ||
c1d3ee99 | 293 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 294 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 295 | */ |
9bb8582e | 296 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 297 | { |
c1d3ee99 | 298 | struct net_device *new_dev; |
7a17a2f7 PE |
299 | struct net *net = dev_net(real_dev); |
300 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 301 | char name[IFNAMSIZ]; |
2ae0bf69 | 302 | int err; |
c1d3ee99 | 303 | |
9bb8582e | 304 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 305 | return -ERANGE; |
c1d3ee99 | 306 | |
9bb8582e | 307 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
308 | if (err < 0) |
309 | return err; | |
c1d3ee99 | 310 | |
1da177e4 | 311 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 312 | switch (vn->name_type) { |
1da177e4 LT |
313 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
314 | /* name will look like: eth1.0005 */ | |
9bb8582e | 315 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
316 | break; |
317 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
318 | /* Put our vlan.VID in the name. | |
319 | * Name will look like: vlan5 | |
320 | */ | |
9bb8582e | 321 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
322 | break; |
323 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
324 | /* Put our vlan.VID in the name. | |
325 | * Name will look like: eth0.5 | |
326 | */ | |
9bb8582e | 327 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
328 | break; |
329 | case VLAN_NAME_TYPE_PLUS_VID: | |
330 | /* Put our vlan.VID in the name. | |
331 | * Name will look like: vlan0005 | |
332 | */ | |
333 | default: | |
9bb8582e | 334 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 335 | } |
122952fc | 336 | |
1da177e4 LT |
337 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
338 | vlan_setup); | |
5dd8d1e9 | 339 | |
1da177e4 | 340 | if (new_dev == NULL) |
2ae0bf69 | 341 | return -ENOBUFS; |
1da177e4 | 342 | |
65d292a2 | 343 | dev_net_set(new_dev, net); |
1da177e4 LT |
344 | /* need 4 bytes for extra VLAN header info, |
345 | * hope the underlying device can handle it. | |
346 | */ | |
347 | new_dev->mtu = real_dev->mtu; | |
348 | ||
9bb8582e | 349 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
350 | vlan_dev_info(new_dev)->real_dev = real_dev; |
351 | vlan_dev_info(new_dev)->dent = NULL; | |
352 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 353 | |
07b5b17e | 354 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
355 | err = register_vlan_dev(new_dev); |
356 | if (err < 0) | |
e89fe42c | 357 | goto out_free_newdev; |
1da177e4 | 358 | |
2ae0bf69 | 359 | return 0; |
1da177e4 | 360 | |
1da177e4 LT |
361 | out_free_newdev: |
362 | free_netdev(new_dev); | |
2ae0bf69 | 363 | return err; |
1da177e4 LT |
364 | } |
365 | ||
8c979c26 PM |
366 | static void vlan_sync_address(struct net_device *dev, |
367 | struct net_device *vlandev) | |
368 | { | |
9dfebcc6 | 369 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
370 | |
371 | /* May be called without an actual change */ | |
372 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
373 | return; | |
374 | ||
375 | /* vlan address was different from the old address and is equal to | |
376 | * the new address */ | |
377 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
378 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
379 | dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); | |
380 | ||
381 | /* vlan address was equal to the old address and is different from | |
382 | * the new address */ | |
383 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
384 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
385 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); | |
386 | ||
387 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
388 | } | |
389 | ||
5fb13570 PM |
390 | static void vlan_transfer_features(struct net_device *dev, |
391 | struct net_device *vlandev) | |
392 | { | |
393 | unsigned long old_features = vlandev->features; | |
394 | ||
289c79a4 PM |
395 | vlandev->features &= ~dev->vlan_features; |
396 | vlandev->features |= dev->features & dev->vlan_features; | |
1ae4be22 | 397 | vlandev->gso_max_size = dev->gso_max_size; |
5fb13570 PM |
398 | |
399 | if (old_features != vlandev->features) | |
400 | netdev_features_change(vlandev); | |
401 | } | |
402 | ||
802fb176 PE |
403 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
404 | { | |
405 | switch (event) { | |
406 | case NETDEV_CHANGENAME: | |
407 | vlan_proc_rem_dev(dev); | |
408 | if (vlan_proc_add_dev(dev) < 0) | |
409 | pr_warning("8021q: failed to change proc name for %s\n", | |
410 | dev->name); | |
411 | break; | |
30688a9a PE |
412 | case NETDEV_REGISTER: |
413 | if (vlan_proc_add_dev(dev) < 0) | |
414 | pr_warning("8021q: failed to add proc entry for %s\n", | |
415 | dev->name); | |
416 | break; | |
417 | case NETDEV_UNREGISTER: | |
418 | vlan_proc_rem_dev(dev); | |
419 | break; | |
802fb176 PE |
420 | } |
421 | } | |
422 | ||
2029cc2c PM |
423 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
424 | void *ptr) | |
1da177e4 LT |
425 | { |
426 | struct net_device *dev = ptr; | |
802fb176 | 427 | struct vlan_group *grp; |
1da177e4 LT |
428 | int i, flgs; |
429 | struct net_device *vlandev; | |
430 | ||
81d85346 | 431 | if (is_vlan_dev(dev)) |
802fb176 | 432 | __vlan_device_event(dev, event); |
802fb176 | 433 | |
a9fde260 | 434 | grp = __vlan_find_group(dev); |
1da177e4 LT |
435 | if (!grp) |
436 | goto out; | |
437 | ||
438 | /* It is OK that we do not hold the group lock right now, | |
439 | * as we run under the RTNL lock. | |
440 | */ | |
441 | ||
442 | switch (event) { | |
443 | case NETDEV_CHANGE: | |
444 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 445 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 446 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
447 | if (!vlandev) |
448 | continue; | |
449 | ||
ddd7bf9f | 450 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
451 | } |
452 | break; | |
453 | ||
8c979c26 PM |
454 | case NETDEV_CHANGEADDR: |
455 | /* Adjust unicast filters on underlying device */ | |
456 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
457 | vlandev = vlan_group_get_device(grp, i); | |
458 | if (!vlandev) | |
459 | continue; | |
460 | ||
d932e04a PM |
461 | flgs = vlandev->flags; |
462 | if (!(flgs & IFF_UP)) | |
463 | continue; | |
464 | ||
8c979c26 PM |
465 | vlan_sync_address(dev, vlandev); |
466 | } | |
467 | break; | |
468 | ||
5fb13570 PM |
469 | case NETDEV_FEAT_CHANGE: |
470 | /* Propagate device features to underlying device */ | |
471 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
472 | vlandev = vlan_group_get_device(grp, i); | |
473 | if (!vlandev) | |
474 | continue; | |
475 | ||
476 | vlan_transfer_features(dev, vlandev); | |
477 | } | |
478 | ||
479 | break; | |
480 | ||
1da177e4 LT |
481 | case NETDEV_DOWN: |
482 | /* Put all VLANs for this dev in the down state too. */ | |
483 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 484 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
485 | if (!vlandev) |
486 | continue; | |
487 | ||
488 | flgs = vlandev->flags; | |
489 | if (!(flgs & IFF_UP)) | |
490 | continue; | |
491 | ||
492 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
493 | } | |
494 | break; | |
495 | ||
496 | case NETDEV_UP: | |
497 | /* Put all VLANs for this dev in the up state too. */ | |
498 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 499 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
500 | if (!vlandev) |
501 | continue; | |
122952fc | 502 | |
1da177e4 LT |
503 | flgs = vlandev->flags; |
504 | if (flgs & IFF_UP) | |
505 | continue; | |
506 | ||
507 | dev_change_flags(vlandev, flgs | IFF_UP); | |
508 | } | |
509 | break; | |
122952fc | 510 | |
1da177e4 LT |
511 | case NETDEV_UNREGISTER: |
512 | /* Delete all VLANs for this dev. */ | |
513 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 514 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
515 | if (!vlandev) |
516 | continue; | |
517 | ||
af301517 PM |
518 | /* unregistration of last vlan destroys group, abort |
519 | * afterwards */ | |
520 | if (grp->nr_vlans == 1) | |
521 | i = VLAN_GROUP_ARRAY_LEN; | |
1da177e4 | 522 | |
af301517 | 523 | unregister_vlan_dev(vlandev); |
1da177e4 LT |
524 | } |
525 | break; | |
3ff50b79 | 526 | } |
1da177e4 LT |
527 | |
528 | out: | |
529 | return NOTIFY_DONE; | |
530 | } | |
531 | ||
69ab4b7d PM |
532 | static struct notifier_block vlan_notifier_block __read_mostly = { |
533 | .notifier_call = vlan_device_event, | |
534 | }; | |
535 | ||
1da177e4 LT |
536 | /* |
537 | * VLAN IOCTL handler. | |
538 | * o execute requested action or pass command to the device driver | |
539 | * arg is really a struct vlan_ioctl_args __user *. | |
540 | */ | |
881d966b | 541 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 542 | { |
c17d8874 | 543 | int err; |
1da177e4 | 544 | struct vlan_ioctl_args args; |
c17d8874 | 545 | struct net_device *dev = NULL; |
1da177e4 LT |
546 | |
547 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
548 | return -EFAULT; | |
549 | ||
550 | /* Null terminate this sucker, just in case. */ | |
551 | args.device1[23] = 0; | |
552 | args.u.device2[23] = 0; | |
553 | ||
c17d8874 PM |
554 | rtnl_lock(); |
555 | ||
1da177e4 LT |
556 | switch (args.cmd) { |
557 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
558 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
559 | case SET_VLAN_FLAG_CMD: | |
560 | case ADD_VLAN_CMD: | |
561 | case DEL_VLAN_CMD: | |
562 | case GET_VLAN_REALDEV_NAME_CMD: | |
563 | case GET_VLAN_VID_CMD: | |
564 | err = -ENODEV; | |
65d292a2 | 565 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
566 | if (!dev) |
567 | goto out; | |
568 | ||
569 | err = -EINVAL; | |
26a25239 | 570 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
571 | goto out; |
572 | } | |
573 | ||
574 | switch (args.cmd) { | |
575 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
576 | err = -EPERM; | |
1da177e4 | 577 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
578 | break; |
579 | vlan_dev_set_ingress_priority(dev, | |
580 | args.u.skb_priority, | |
581 | args.vlan_qos); | |
fffe470a | 582 | err = 0; |
1da177e4 LT |
583 | break; |
584 | ||
585 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 586 | err = -EPERM; |
1da177e4 | 587 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
588 | break; |
589 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
590 | args.u.skb_priority, |
591 | args.vlan_qos); | |
592 | break; | |
593 | ||
594 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 595 | err = -EPERM; |
1da177e4 | 596 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 597 | break; |
b3ce0325 PM |
598 | err = vlan_dev_change_flags(dev, |
599 | args.vlan_qos ? args.u.flag : 0, | |
600 | args.u.flag); | |
1da177e4 LT |
601 | break; |
602 | ||
603 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 604 | err = -EPERM; |
1da177e4 | 605 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 606 | break; |
c17d8874 PM |
607 | if ((args.u.name_type >= 0) && |
608 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
609 | struct vlan_net *vn; |
610 | ||
611 | vn = net_generic(net, vlan_net_id); | |
612 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
613 | err = 0; |
614 | } else { | |
615 | err = -EINVAL; | |
616 | } | |
617 | break; | |
618 | ||
619 | case ADD_VLAN_CMD: | |
c17d8874 | 620 | err = -EPERM; |
1da177e4 | 621 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 622 | break; |
2ae0bf69 | 623 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
624 | break; |
625 | ||
626 | case DEL_VLAN_CMD: | |
c17d8874 | 627 | err = -EPERM; |
1da177e4 | 628 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 629 | break; |
af301517 PM |
630 | unregister_vlan_dev(dev); |
631 | err = 0; | |
1da177e4 LT |
632 | break; |
633 | ||
1da177e4 | 634 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 635 | err = 0; |
c17d8874 | 636 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 637 | if (copy_to_user(arg, &args, |
2029cc2c | 638 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 639 | err = -EFAULT; |
1da177e4 LT |
640 | break; |
641 | ||
642 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 643 | err = 0; |
22d1ba74 | 644 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 645 | if (copy_to_user(arg, &args, |
2029cc2c | 646 | sizeof(struct vlan_ioctl_args))) |
122952fc | 647 | err = -EFAULT; |
1da177e4 LT |
648 | break; |
649 | ||
650 | default: | |
198a291c | 651 | err = -EOPNOTSUPP; |
c17d8874 | 652 | break; |
3ff50b79 | 653 | } |
7eb1b3d3 | 654 | out: |
c17d8874 | 655 | rtnl_unlock(); |
1da177e4 LT |
656 | return err; |
657 | } | |
658 | ||
d9ed0f0e PE |
659 | static int vlan_init_net(struct net *net) |
660 | { | |
661 | int err; | |
662 | struct vlan_net *vn; | |
663 | ||
664 | err = -ENOMEM; | |
665 | vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL); | |
666 | if (vn == NULL) | |
667 | goto err_alloc; | |
668 | ||
669 | err = net_assign_generic(net, vlan_net_id, vn); | |
670 | if (err < 0) | |
671 | goto err_assign; | |
672 | ||
7a17a2f7 PE |
673 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
674 | ||
cd1c7014 PE |
675 | err = vlan_proc_init(net); |
676 | if (err < 0) | |
677 | goto err_proc; | |
678 | ||
d9ed0f0e PE |
679 | return 0; |
680 | ||
cd1c7014 PE |
681 | err_proc: |
682 | /* nothing */ | |
d9ed0f0e PE |
683 | err_assign: |
684 | kfree(vn); | |
685 | err_alloc: | |
686 | return err; | |
687 | } | |
688 | ||
689 | static void vlan_exit_net(struct net *net) | |
690 | { | |
691 | struct vlan_net *vn; | |
692 | ||
693 | vn = net_generic(net, vlan_net_id); | |
65d292a2 | 694 | rtnl_kill_links(net, &vlan_link_ops); |
cd1c7014 | 695 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
696 | kfree(vn); |
697 | } | |
698 | ||
699 | static struct pernet_operations vlan_net_ops = { | |
700 | .init = vlan_init_net, | |
701 | .exit = vlan_exit_net, | |
702 | }; | |
703 | ||
69ab4b7d PM |
704 | static int __init vlan_proto_init(void) |
705 | { | |
706 | int err; | |
707 | ||
708 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
709 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
710 | ||
d9ed0f0e PE |
711 | err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops); |
712 | if (err < 0) | |
713 | goto err0; | |
714 | ||
69ab4b7d PM |
715 | err = register_netdevice_notifier(&vlan_notifier_block); |
716 | if (err < 0) | |
717 | goto err2; | |
718 | ||
70c03b49 | 719 | err = vlan_gvrp_init(); |
69ab4b7d PM |
720 | if (err < 0) |
721 | goto err3; | |
722 | ||
70c03b49 PM |
723 | err = vlan_netlink_init(); |
724 | if (err < 0) | |
725 | goto err4; | |
726 | ||
69ab4b7d PM |
727 | dev_add_pack(&vlan_packet_type); |
728 | vlan_ioctl_set(vlan_ioctl_handler); | |
729 | return 0; | |
730 | ||
70c03b49 PM |
731 | err4: |
732 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
733 | err3: |
734 | unregister_netdevice_notifier(&vlan_notifier_block); | |
735 | err2: | |
d9ed0f0e PE |
736 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
737 | err0: | |
69ab4b7d PM |
738 | return err; |
739 | } | |
740 | ||
741 | static void __exit vlan_cleanup_module(void) | |
742 | { | |
743 | unsigned int i; | |
744 | ||
745 | vlan_ioctl_set(NULL); | |
746 | vlan_netlink_fini(); | |
747 | ||
748 | unregister_netdevice_notifier(&vlan_notifier_block); | |
749 | ||
750 | dev_remove_pack(&vlan_packet_type); | |
751 | ||
752 | /* This table must be empty if there are no module references left. */ | |
753 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) | |
754 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
755 | ||
d9ed0f0e | 756 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
69ab4b7d | 757 | synchronize_net(); |
70c03b49 PM |
758 | |
759 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
760 | } |
761 | ||
762 | module_init(vlan_proto_init); | |
763 | module_exit(vlan_cleanup_module); | |
764 | ||
1da177e4 LT |
765 | MODULE_LICENSE("GPL"); |
766 | MODULE_VERSION(DRV_VERSION); |