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 | 48 | |
b3020061 SH |
49 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
50 | const char vlan_version[] = DRV_VERSION; | |
51 | static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
52 | static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
1da177e4 | 53 | |
7546dd97 | 54 | static struct packet_type vlan_packet_type __read_mostly = { |
09640e63 | 55 | .type = cpu_to_be16(ETH_P_8021Q), |
1da177e4 LT |
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; |
656299f7 | 147 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 | 148 | struct vlan_group *grp; |
9bb8582e | 149 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
150 | |
151 | ASSERT_RTNL(); | |
acc5efbc | 152 | |
a9fde260 | 153 | grp = __vlan_find_group(real_dev); |
af301517 | 154 | BUG_ON(!grp); |
acc5efbc | 155 | |
acc5efbc PM |
156 | /* Take it out of our own structures, but be sure to interlock with |
157 | * HW accelerating devices or SW vlan input packet processing. | |
158 | */ | |
159 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
656299f7 | 160 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 161 | |
acc5efbc | 162 | vlan_group_set_device(grp, vlan_id, NULL); |
af301517 | 163 | grp->nr_vlans--; |
acc5efbc | 164 | |
af301517 | 165 | synchronize_net(); |
acc5efbc | 166 | |
ce305002 PM |
167 | unregister_netdevice(dev); |
168 | ||
acc5efbc | 169 | /* If the group is now empty, kill off the group. */ |
af301517 | 170 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
171 | vlan_gvrp_uninit_applicant(real_dev); |
172 | ||
acc5efbc | 173 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 174 | ops->ndo_vlan_rx_register(real_dev, NULL); |
acc5efbc PM |
175 | |
176 | hlist_del_rcu(&grp->hlist); | |
1da177e4 | 177 | |
acc5efbc PM |
178 | /* Free the group, after all cpu's are done. */ |
179 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
180 | } |
181 | ||
af301517 PM |
182 | /* Get rid of the vlan's reference to real_dev */ |
183 | dev_put(real_dev); | |
1da177e4 LT |
184 | } |
185 | ||
2029cc2c PM |
186 | static void vlan_transfer_operstate(const struct net_device *dev, |
187 | struct net_device *vlandev) | |
ddd7bf9f SR |
188 | { |
189 | /* Have to respect userspace enforced dormant state | |
190 | * of real device, also must allow supplicant running | |
191 | * on VLAN device | |
192 | */ | |
193 | if (dev->operstate == IF_OPER_DORMANT) | |
194 | netif_dormant_on(vlandev); | |
195 | else | |
196 | netif_dormant_off(vlandev); | |
197 | ||
198 | if (netif_carrier_ok(dev)) { | |
199 | if (!netif_carrier_ok(vlandev)) | |
200 | netif_carrier_on(vlandev); | |
201 | } else { | |
202 | if (netif_carrier_ok(vlandev)) | |
203 | netif_carrier_off(vlandev); | |
204 | } | |
205 | } | |
206 | ||
9bb8582e | 207 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 208 | { |
656299f7 SH |
209 | const char *name = real_dev->name; |
210 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 211 | |
1da177e4 | 212 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 213 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 214 | return -EOPNOTSUPP; |
1da177e4 LT |
215 | } |
216 | ||
656299f7 | 217 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) { |
40f98e1a | 218 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 219 | return -EOPNOTSUPP; |
1da177e4 LT |
220 | } |
221 | ||
222 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
656299f7 | 223 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
40f98e1a | 224 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 225 | return -EOPNOTSUPP; |
1da177e4 LT |
226 | } |
227 | ||
40f98e1a | 228 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 229 | return -EEXIST; |
1da177e4 | 230 | |
c1d3ee99 PM |
231 | return 0; |
232 | } | |
233 | ||
07b5b17e | 234 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 235 | { |
9dfebcc6 | 236 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 237 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 238 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 239 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
240 | struct vlan_group *grp, *ngrp = NULL; |
241 | int err; | |
242 | ||
a9fde260 | 243 | grp = __vlan_find_group(real_dev); |
e89fe42c | 244 | if (!grp) { |
a9fde260 | 245 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
246 | if (!grp) |
247 | return -ENOBUFS; | |
70c03b49 PM |
248 | err = vlan_gvrp_init_applicant(real_dev); |
249 | if (err < 0) | |
250 | goto out_free_group; | |
e89fe42c PM |
251 | } |
252 | ||
67727184 PE |
253 | err = vlan_group_prealloc_vid(grp, vlan_id); |
254 | if (err < 0) | |
70c03b49 | 255 | goto out_uninit_applicant; |
67727184 | 256 | |
e89fe42c PM |
257 | err = register_netdevice(dev); |
258 | if (err < 0) | |
70c03b49 | 259 | goto out_uninit_applicant; |
e89fe42c PM |
260 | |
261 | /* Account for reference in struct vlan_dev_info */ | |
262 | dev_hold(real_dev); | |
263 | ||
264 | vlan_transfer_operstate(real_dev, dev); | |
265 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
266 | ||
267 | /* So, got the sucker initialized, now lets place | |
268 | * it into our local structure. | |
269 | */ | |
270 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
271 | grp->nr_vlans++; |
272 | ||
e89fe42c | 273 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 274 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
e89fe42c | 275 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 276 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 277 | |
e89fe42c PM |
278 | return 0; |
279 | ||
70c03b49 PM |
280 | out_uninit_applicant: |
281 | if (ngrp) | |
282 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c PM |
283 | out_free_group: |
284 | if (ngrp) | |
285 | vlan_group_free(ngrp); | |
286 | return err; | |
287 | } | |
288 | ||
c1d3ee99 | 289 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 290 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 291 | */ |
9bb8582e | 292 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 293 | { |
c1d3ee99 | 294 | struct net_device *new_dev; |
7a17a2f7 PE |
295 | struct net *net = dev_net(real_dev); |
296 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 297 | char name[IFNAMSIZ]; |
2ae0bf69 | 298 | int err; |
c1d3ee99 | 299 | |
9bb8582e | 300 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 301 | return -ERANGE; |
c1d3ee99 | 302 | |
9bb8582e | 303 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
304 | if (err < 0) |
305 | return err; | |
c1d3ee99 | 306 | |
1da177e4 | 307 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 308 | switch (vn->name_type) { |
1da177e4 LT |
309 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
310 | /* name will look like: eth1.0005 */ | |
9bb8582e | 311 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
312 | break; |
313 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
314 | /* Put our vlan.VID in the name. | |
315 | * Name will look like: vlan5 | |
316 | */ | |
9bb8582e | 317 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
318 | break; |
319 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
320 | /* Put our vlan.VID in the name. | |
321 | * Name will look like: eth0.5 | |
322 | */ | |
9bb8582e | 323 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
324 | break; |
325 | case VLAN_NAME_TYPE_PLUS_VID: | |
326 | /* Put our vlan.VID in the name. | |
327 | * Name will look like: vlan0005 | |
328 | */ | |
329 | default: | |
9bb8582e | 330 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 331 | } |
122952fc | 332 | |
1da177e4 LT |
333 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
334 | vlan_setup); | |
5dd8d1e9 | 335 | |
1da177e4 | 336 | if (new_dev == NULL) |
2ae0bf69 | 337 | return -ENOBUFS; |
1da177e4 | 338 | |
65d292a2 | 339 | dev_net_set(new_dev, net); |
1da177e4 LT |
340 | /* need 4 bytes for extra VLAN header info, |
341 | * hope the underlying device can handle it. | |
342 | */ | |
343 | new_dev->mtu = real_dev->mtu; | |
344 | ||
9bb8582e | 345 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
346 | vlan_dev_info(new_dev)->real_dev = real_dev; |
347 | vlan_dev_info(new_dev)->dent = NULL; | |
348 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 349 | |
07b5b17e | 350 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
351 | err = register_vlan_dev(new_dev); |
352 | if (err < 0) | |
e89fe42c | 353 | goto out_free_newdev; |
1da177e4 | 354 | |
2ae0bf69 | 355 | return 0; |
1da177e4 | 356 | |
1da177e4 LT |
357 | out_free_newdev: |
358 | free_netdev(new_dev); | |
2ae0bf69 | 359 | return err; |
1da177e4 LT |
360 | } |
361 | ||
8c979c26 PM |
362 | static void vlan_sync_address(struct net_device *dev, |
363 | struct net_device *vlandev) | |
364 | { | |
9dfebcc6 | 365 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
366 | |
367 | /* May be called without an actual change */ | |
368 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
369 | return; | |
370 | ||
371 | /* vlan address was different from the old address and is equal to | |
372 | * the new address */ | |
373 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
374 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
ccffad25 | 375 | dev_unicast_delete(dev, vlandev->dev_addr); |
8c979c26 PM |
376 | |
377 | /* vlan address was equal to the old address and is different from | |
378 | * the new address */ | |
379 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
380 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
ccffad25 | 381 | dev_unicast_add(dev, vlandev->dev_addr); |
8c979c26 PM |
382 | |
383 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
384 | } | |
385 | ||
5fb13570 PM |
386 | static void vlan_transfer_features(struct net_device *dev, |
387 | struct net_device *vlandev) | |
388 | { | |
389 | unsigned long old_features = vlandev->features; | |
390 | ||
289c79a4 PM |
391 | vlandev->features &= ~dev->vlan_features; |
392 | vlandev->features |= dev->features & dev->vlan_features; | |
1ae4be22 | 393 | vlandev->gso_max_size = dev->gso_max_size; |
5fb13570 PM |
394 | |
395 | if (old_features != vlandev->features) | |
396 | netdev_features_change(vlandev); | |
397 | } | |
398 | ||
802fb176 PE |
399 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
400 | { | |
401 | switch (event) { | |
402 | case NETDEV_CHANGENAME: | |
403 | vlan_proc_rem_dev(dev); | |
404 | if (vlan_proc_add_dev(dev) < 0) | |
405 | pr_warning("8021q: failed to change proc name for %s\n", | |
406 | dev->name); | |
407 | break; | |
30688a9a PE |
408 | case NETDEV_REGISTER: |
409 | if (vlan_proc_add_dev(dev) < 0) | |
410 | pr_warning("8021q: failed to add proc entry for %s\n", | |
411 | dev->name); | |
412 | break; | |
413 | case NETDEV_UNREGISTER: | |
414 | vlan_proc_rem_dev(dev); | |
415 | break; | |
802fb176 PE |
416 | } |
417 | } | |
418 | ||
2029cc2c PM |
419 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
420 | void *ptr) | |
1da177e4 LT |
421 | { |
422 | struct net_device *dev = ptr; | |
802fb176 | 423 | struct vlan_group *grp; |
1da177e4 LT |
424 | int i, flgs; |
425 | struct net_device *vlandev; | |
426 | ||
81d85346 | 427 | if (is_vlan_dev(dev)) |
802fb176 | 428 | __vlan_device_event(dev, event); |
802fb176 | 429 | |
a9fde260 | 430 | grp = __vlan_find_group(dev); |
1da177e4 LT |
431 | if (!grp) |
432 | goto out; | |
433 | ||
434 | /* It is OK that we do not hold the group lock right now, | |
435 | * as we run under the RTNL lock. | |
436 | */ | |
437 | ||
438 | switch (event) { | |
439 | case NETDEV_CHANGE: | |
440 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 441 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 442 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
443 | if (!vlandev) |
444 | continue; | |
445 | ||
ddd7bf9f | 446 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
447 | } |
448 | break; | |
449 | ||
8c979c26 PM |
450 | case NETDEV_CHANGEADDR: |
451 | /* Adjust unicast filters on underlying device */ | |
452 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
453 | vlandev = vlan_group_get_device(grp, i); | |
454 | if (!vlandev) | |
455 | continue; | |
456 | ||
d932e04a PM |
457 | flgs = vlandev->flags; |
458 | if (!(flgs & IFF_UP)) | |
459 | continue; | |
460 | ||
8c979c26 PM |
461 | vlan_sync_address(dev, vlandev); |
462 | } | |
2e477c9b HX |
463 | break; |
464 | ||
465 | case NETDEV_CHANGEMTU: | |
466 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
467 | vlandev = vlan_group_get_device(grp, i); | |
468 | if (!vlandev) | |
469 | continue; | |
470 | ||
471 | if (vlandev->mtu <= dev->mtu) | |
472 | continue; | |
473 | ||
474 | dev_set_mtu(vlandev, dev->mtu); | |
475 | } | |
8c979c26 PM |
476 | break; |
477 | ||
5fb13570 PM |
478 | case NETDEV_FEAT_CHANGE: |
479 | /* Propagate device features to underlying device */ | |
480 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
481 | vlandev = vlan_group_get_device(grp, i); | |
482 | if (!vlandev) | |
483 | continue; | |
484 | ||
485 | vlan_transfer_features(dev, vlandev); | |
486 | } | |
487 | ||
488 | break; | |
489 | ||
1da177e4 LT |
490 | case NETDEV_DOWN: |
491 | /* Put all VLANs for this dev in the down state too. */ | |
492 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 493 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
494 | if (!vlandev) |
495 | continue; | |
496 | ||
497 | flgs = vlandev->flags; | |
498 | if (!(flgs & IFF_UP)) | |
499 | continue; | |
500 | ||
501 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
adc667e8 | 502 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
503 | } |
504 | break; | |
505 | ||
506 | case NETDEV_UP: | |
507 | /* Put all VLANs for this dev in the up state too. */ | |
508 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 509 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
510 | if (!vlandev) |
511 | continue; | |
122952fc | 512 | |
1da177e4 LT |
513 | flgs = vlandev->flags; |
514 | if (flgs & IFF_UP) | |
515 | continue; | |
516 | ||
517 | dev_change_flags(vlandev, flgs | IFF_UP); | |
adc667e8 | 518 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
519 | } |
520 | break; | |
122952fc | 521 | |
1da177e4 LT |
522 | case NETDEV_UNREGISTER: |
523 | /* Delete all VLANs for this dev. */ | |
524 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 525 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
526 | if (!vlandev) |
527 | continue; | |
528 | ||
af301517 PM |
529 | /* unregistration of last vlan destroys group, abort |
530 | * afterwards */ | |
531 | if (grp->nr_vlans == 1) | |
532 | i = VLAN_GROUP_ARRAY_LEN; | |
1da177e4 | 533 | |
af301517 | 534 | unregister_vlan_dev(vlandev); |
1da177e4 LT |
535 | } |
536 | break; | |
3ff50b79 | 537 | } |
1da177e4 LT |
538 | |
539 | out: | |
540 | return NOTIFY_DONE; | |
541 | } | |
542 | ||
69ab4b7d PM |
543 | static struct notifier_block vlan_notifier_block __read_mostly = { |
544 | .notifier_call = vlan_device_event, | |
545 | }; | |
546 | ||
1da177e4 LT |
547 | /* |
548 | * VLAN IOCTL handler. | |
549 | * o execute requested action or pass command to the device driver | |
550 | * arg is really a struct vlan_ioctl_args __user *. | |
551 | */ | |
881d966b | 552 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 553 | { |
c17d8874 | 554 | int err; |
1da177e4 | 555 | struct vlan_ioctl_args args; |
c17d8874 | 556 | struct net_device *dev = NULL; |
1da177e4 LT |
557 | |
558 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
559 | return -EFAULT; | |
560 | ||
561 | /* Null terminate this sucker, just in case. */ | |
562 | args.device1[23] = 0; | |
563 | args.u.device2[23] = 0; | |
564 | ||
c17d8874 PM |
565 | rtnl_lock(); |
566 | ||
1da177e4 LT |
567 | switch (args.cmd) { |
568 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
569 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
570 | case SET_VLAN_FLAG_CMD: | |
571 | case ADD_VLAN_CMD: | |
572 | case DEL_VLAN_CMD: | |
573 | case GET_VLAN_REALDEV_NAME_CMD: | |
574 | case GET_VLAN_VID_CMD: | |
575 | err = -ENODEV; | |
65d292a2 | 576 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
577 | if (!dev) |
578 | goto out; | |
579 | ||
580 | err = -EINVAL; | |
26a25239 | 581 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
582 | goto out; |
583 | } | |
584 | ||
585 | switch (args.cmd) { | |
586 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
587 | err = -EPERM; | |
1da177e4 | 588 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
589 | break; |
590 | vlan_dev_set_ingress_priority(dev, | |
591 | args.u.skb_priority, | |
592 | args.vlan_qos); | |
fffe470a | 593 | err = 0; |
1da177e4 LT |
594 | break; |
595 | ||
596 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 597 | err = -EPERM; |
1da177e4 | 598 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
599 | break; |
600 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
601 | args.u.skb_priority, |
602 | args.vlan_qos); | |
603 | break; | |
604 | ||
605 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 606 | err = -EPERM; |
1da177e4 | 607 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 608 | break; |
b3ce0325 PM |
609 | err = vlan_dev_change_flags(dev, |
610 | args.vlan_qos ? args.u.flag : 0, | |
611 | args.u.flag); | |
1da177e4 LT |
612 | break; |
613 | ||
614 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 615 | err = -EPERM; |
1da177e4 | 616 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 617 | break; |
c17d8874 PM |
618 | if ((args.u.name_type >= 0) && |
619 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
620 | struct vlan_net *vn; |
621 | ||
622 | vn = net_generic(net, vlan_net_id); | |
623 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
624 | err = 0; |
625 | } else { | |
626 | err = -EINVAL; | |
627 | } | |
628 | break; | |
629 | ||
630 | case ADD_VLAN_CMD: | |
c17d8874 | 631 | err = -EPERM; |
1da177e4 | 632 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 633 | break; |
2ae0bf69 | 634 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
635 | break; |
636 | ||
637 | case DEL_VLAN_CMD: | |
c17d8874 | 638 | err = -EPERM; |
1da177e4 | 639 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 640 | break; |
af301517 PM |
641 | unregister_vlan_dev(dev); |
642 | err = 0; | |
1da177e4 LT |
643 | break; |
644 | ||
1da177e4 | 645 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 646 | err = 0; |
c17d8874 | 647 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 648 | if (copy_to_user(arg, &args, |
2029cc2c | 649 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 650 | err = -EFAULT; |
1da177e4 LT |
651 | break; |
652 | ||
653 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 654 | err = 0; |
22d1ba74 | 655 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 656 | if (copy_to_user(arg, &args, |
2029cc2c | 657 | sizeof(struct vlan_ioctl_args))) |
122952fc | 658 | err = -EFAULT; |
1da177e4 LT |
659 | break; |
660 | ||
661 | default: | |
198a291c | 662 | err = -EOPNOTSUPP; |
c17d8874 | 663 | break; |
3ff50b79 | 664 | } |
7eb1b3d3 | 665 | out: |
c17d8874 | 666 | rtnl_unlock(); |
1da177e4 LT |
667 | return err; |
668 | } | |
669 | ||
d9ed0f0e PE |
670 | static int vlan_init_net(struct net *net) |
671 | { | |
672 | int err; | |
673 | struct vlan_net *vn; | |
674 | ||
675 | err = -ENOMEM; | |
676 | vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL); | |
677 | if (vn == NULL) | |
678 | goto err_alloc; | |
679 | ||
680 | err = net_assign_generic(net, vlan_net_id, vn); | |
681 | if (err < 0) | |
682 | goto err_assign; | |
683 | ||
7a17a2f7 PE |
684 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
685 | ||
cd1c7014 PE |
686 | err = vlan_proc_init(net); |
687 | if (err < 0) | |
688 | goto err_proc; | |
689 | ||
d9ed0f0e PE |
690 | return 0; |
691 | ||
cd1c7014 PE |
692 | err_proc: |
693 | /* nothing */ | |
d9ed0f0e PE |
694 | err_assign: |
695 | kfree(vn); | |
696 | err_alloc: | |
697 | return err; | |
698 | } | |
699 | ||
700 | static void vlan_exit_net(struct net *net) | |
701 | { | |
702 | struct vlan_net *vn; | |
703 | ||
704 | vn = net_generic(net, vlan_net_id); | |
65d292a2 | 705 | rtnl_kill_links(net, &vlan_link_ops); |
cd1c7014 | 706 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
707 | kfree(vn); |
708 | } | |
709 | ||
710 | static struct pernet_operations vlan_net_ops = { | |
711 | .init = vlan_init_net, | |
712 | .exit = vlan_exit_net, | |
713 | }; | |
714 | ||
69ab4b7d PM |
715 | static int __init vlan_proto_init(void) |
716 | { | |
717 | int err; | |
718 | ||
719 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
720 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
721 | ||
d9ed0f0e PE |
722 | err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops); |
723 | if (err < 0) | |
724 | goto err0; | |
725 | ||
69ab4b7d PM |
726 | err = register_netdevice_notifier(&vlan_notifier_block); |
727 | if (err < 0) | |
728 | goto err2; | |
729 | ||
70c03b49 | 730 | err = vlan_gvrp_init(); |
69ab4b7d PM |
731 | if (err < 0) |
732 | goto err3; | |
733 | ||
70c03b49 PM |
734 | err = vlan_netlink_init(); |
735 | if (err < 0) | |
736 | goto err4; | |
737 | ||
69ab4b7d PM |
738 | dev_add_pack(&vlan_packet_type); |
739 | vlan_ioctl_set(vlan_ioctl_handler); | |
740 | return 0; | |
741 | ||
70c03b49 PM |
742 | err4: |
743 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
744 | err3: |
745 | unregister_netdevice_notifier(&vlan_notifier_block); | |
746 | err2: | |
d9ed0f0e PE |
747 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
748 | err0: | |
69ab4b7d PM |
749 | return err; |
750 | } | |
751 | ||
752 | static void __exit vlan_cleanup_module(void) | |
753 | { | |
754 | unsigned int i; | |
755 | ||
756 | vlan_ioctl_set(NULL); | |
757 | vlan_netlink_fini(); | |
758 | ||
759 | unregister_netdevice_notifier(&vlan_notifier_block); | |
760 | ||
761 | dev_remove_pack(&vlan_packet_type); | |
762 | ||
763 | /* This table must be empty if there are no module references left. */ | |
764 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) | |
765 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
766 | ||
d9ed0f0e | 767 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
6e327c11 | 768 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
769 | |
770 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
771 | } |
772 | ||
773 | module_init(vlan_proto_init); | |
774 | module_exit(vlan_cleanup_module); | |
775 | ||
1da177e4 LT |
776 | MODULE_LICENSE("GPL"); |
777 | MODULE_VERSION(DRV_VERSION); |