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Commit | Line | Data |
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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> | |
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 | ||
f99189b1 | 44 | int vlan_net_id __read_mostly; |
d9ed0f0e | 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 | ||
23289a37 | 143 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
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 | |
af301517 | 162 | grp->nr_vlans--; |
acc5efbc | 163 | |
29906f6a PM |
164 | vlan_group_set_device(grp, vlan_id, NULL); |
165 | if (!grp->killall) | |
63c8099d | 166 | synchronize_net(); |
29906f6a | 167 | |
23289a37 | 168 | unregister_netdevice_queue(dev, head); |
ce305002 | 169 | |
acc5efbc | 170 | /* If the group is now empty, kill off the group. */ |
af301517 | 171 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
172 | vlan_gvrp_uninit_applicant(real_dev); |
173 | ||
acc5efbc | 174 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 175 | ops->ndo_vlan_rx_register(real_dev, NULL); |
acc5efbc PM |
176 | |
177 | hlist_del_rcu(&grp->hlist); | |
1da177e4 | 178 | |
acc5efbc PM |
179 | /* Free the group, after all cpu's are done. */ |
180 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
181 | } |
182 | ||
af301517 PM |
183 | /* Get rid of the vlan's reference to real_dev */ |
184 | dev_put(real_dev); | |
1da177e4 LT |
185 | } |
186 | ||
9bb8582e | 187 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 188 | { |
656299f7 SH |
189 | const char *name = real_dev->name; |
190 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 191 | |
1da177e4 | 192 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 193 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 194 | return -EOPNOTSUPP; |
1da177e4 LT |
195 | } |
196 | ||
656299f7 | 197 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) { |
40f98e1a | 198 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 199 | return -EOPNOTSUPP; |
1da177e4 LT |
200 | } |
201 | ||
202 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
656299f7 | 203 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
40f98e1a | 204 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 205 | return -EOPNOTSUPP; |
1da177e4 LT |
206 | } |
207 | ||
40f98e1a | 208 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 209 | return -EEXIST; |
1da177e4 | 210 | |
c1d3ee99 PM |
211 | return 0; |
212 | } | |
213 | ||
07b5b17e | 214 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 215 | { |
9dfebcc6 | 216 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 217 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 218 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 219 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
220 | struct vlan_group *grp, *ngrp = NULL; |
221 | int err; | |
222 | ||
a9fde260 | 223 | grp = __vlan_find_group(real_dev); |
e89fe42c | 224 | if (!grp) { |
a9fde260 | 225 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
226 | if (!grp) |
227 | return -ENOBUFS; | |
70c03b49 PM |
228 | err = vlan_gvrp_init_applicant(real_dev); |
229 | if (err < 0) | |
230 | goto out_free_group; | |
e89fe42c PM |
231 | } |
232 | ||
67727184 PE |
233 | err = vlan_group_prealloc_vid(grp, vlan_id); |
234 | if (err < 0) | |
70c03b49 | 235 | goto out_uninit_applicant; |
67727184 | 236 | |
e89fe42c PM |
237 | err = register_netdevice(dev); |
238 | if (err < 0) | |
70c03b49 | 239 | goto out_uninit_applicant; |
e89fe42c PM |
240 | |
241 | /* Account for reference in struct vlan_dev_info */ | |
242 | dev_hold(real_dev); | |
243 | ||
fc4a7489 | 244 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
245 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
246 | ||
247 | /* So, got the sucker initialized, now lets place | |
248 | * it into our local structure. | |
249 | */ | |
250 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
251 | grp->nr_vlans++; |
252 | ||
e89fe42c | 253 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 254 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
e89fe42c | 255 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 256 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 257 | |
e89fe42c PM |
258 | return 0; |
259 | ||
70c03b49 PM |
260 | out_uninit_applicant: |
261 | if (ngrp) | |
262 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c | 263 | out_free_group: |
6b863d1d ED |
264 | if (ngrp) { |
265 | hlist_del_rcu(&ngrp->hlist); | |
266 | /* Free the group, after all cpu's are done. */ | |
267 | call_rcu(&ngrp->rcu, vlan_rcu_free); | |
268 | } | |
e89fe42c PM |
269 | return err; |
270 | } | |
271 | ||
c1d3ee99 | 272 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 273 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 274 | */ |
9bb8582e | 275 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 276 | { |
c1d3ee99 | 277 | struct net_device *new_dev; |
7a17a2f7 PE |
278 | struct net *net = dev_net(real_dev); |
279 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 280 | char name[IFNAMSIZ]; |
2ae0bf69 | 281 | int err; |
c1d3ee99 | 282 | |
9bb8582e | 283 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 284 | return -ERANGE; |
c1d3ee99 | 285 | |
9bb8582e | 286 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
287 | if (err < 0) |
288 | return err; | |
c1d3ee99 | 289 | |
1da177e4 | 290 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 291 | switch (vn->name_type) { |
1da177e4 LT |
292 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
293 | /* name will look like: eth1.0005 */ | |
9bb8582e | 294 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
295 | break; |
296 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
297 | /* Put our vlan.VID in the name. | |
298 | * Name will look like: vlan5 | |
299 | */ | |
9bb8582e | 300 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
301 | break; |
302 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
303 | /* Put our vlan.VID in the name. | |
304 | * Name will look like: eth0.5 | |
305 | */ | |
9bb8582e | 306 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
307 | break; |
308 | case VLAN_NAME_TYPE_PLUS_VID: | |
309 | /* Put our vlan.VID in the name. | |
310 | * Name will look like: vlan0005 | |
311 | */ | |
312 | default: | |
9bb8582e | 313 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 314 | } |
122952fc | 315 | |
2e59af3d ED |
316 | new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name, |
317 | vlan_setup, real_dev->num_tx_queues); | |
5dd8d1e9 | 318 | |
1da177e4 | 319 | if (new_dev == NULL) |
2ae0bf69 | 320 | return -ENOBUFS; |
1da177e4 | 321 | |
2e59af3d | 322 | new_dev->real_num_tx_queues = real_dev->real_num_tx_queues; |
65d292a2 | 323 | dev_net_set(new_dev, net); |
1da177e4 LT |
324 | /* need 4 bytes for extra VLAN header info, |
325 | * hope the underlying device can handle it. | |
326 | */ | |
327 | new_dev->mtu = real_dev->mtu; | |
328 | ||
9bb8582e | 329 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
330 | vlan_dev_info(new_dev)->real_dev = real_dev; |
331 | vlan_dev_info(new_dev)->dent = NULL; | |
332 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 333 | |
07b5b17e | 334 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
335 | err = register_vlan_dev(new_dev); |
336 | if (err < 0) | |
e89fe42c | 337 | goto out_free_newdev; |
1da177e4 | 338 | |
2ae0bf69 | 339 | return 0; |
1da177e4 | 340 | |
1da177e4 LT |
341 | out_free_newdev: |
342 | free_netdev(new_dev); | |
2ae0bf69 | 343 | return err; |
1da177e4 LT |
344 | } |
345 | ||
8c979c26 PM |
346 | static void vlan_sync_address(struct net_device *dev, |
347 | struct net_device *vlandev) | |
348 | { | |
9dfebcc6 | 349 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
350 | |
351 | /* May be called without an actual change */ | |
352 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
353 | return; | |
354 | ||
355 | /* vlan address was different from the old address and is equal to | |
356 | * the new address */ | |
357 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
358 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
ccffad25 | 359 | dev_unicast_delete(dev, vlandev->dev_addr); |
8c979c26 PM |
360 | |
361 | /* vlan address was equal to the old address and is different from | |
362 | * the new address */ | |
363 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
364 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
ccffad25 | 365 | dev_unicast_add(dev, vlandev->dev_addr); |
8c979c26 PM |
366 | |
367 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
368 | } | |
369 | ||
5fb13570 PM |
370 | static void vlan_transfer_features(struct net_device *dev, |
371 | struct net_device *vlandev) | |
372 | { | |
373 | unsigned long old_features = vlandev->features; | |
374 | ||
289c79a4 PM |
375 | vlandev->features &= ~dev->vlan_features; |
376 | vlandev->features |= dev->features & dev->vlan_features; | |
1ae4be22 | 377 | vlandev->gso_max_size = dev->gso_max_size; |
b85daa53 VD |
378 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
379 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
380 | #endif | |
5fb13570 PM |
381 | |
382 | if (old_features != vlandev->features) | |
383 | netdev_features_change(vlandev); | |
384 | } | |
385 | ||
802fb176 PE |
386 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
387 | { | |
388 | switch (event) { | |
389 | case NETDEV_CHANGENAME: | |
390 | vlan_proc_rem_dev(dev); | |
391 | if (vlan_proc_add_dev(dev) < 0) | |
392 | pr_warning("8021q: failed to change proc name for %s\n", | |
393 | dev->name); | |
394 | break; | |
30688a9a PE |
395 | case NETDEV_REGISTER: |
396 | if (vlan_proc_add_dev(dev) < 0) | |
397 | pr_warning("8021q: failed to add proc entry for %s\n", | |
398 | dev->name); | |
399 | break; | |
400 | case NETDEV_UNREGISTER: | |
401 | vlan_proc_rem_dev(dev); | |
402 | break; | |
802fb176 PE |
403 | } |
404 | } | |
405 | ||
2029cc2c PM |
406 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
407 | void *ptr) | |
1da177e4 LT |
408 | { |
409 | struct net_device *dev = ptr; | |
802fb176 | 410 | struct vlan_group *grp; |
1da177e4 LT |
411 | int i, flgs; |
412 | struct net_device *vlandev; | |
5e756593 | 413 | struct vlan_dev_info *vlan; |
29906f6a | 414 | LIST_HEAD(list); |
1da177e4 | 415 | |
81d85346 | 416 | if (is_vlan_dev(dev)) |
802fb176 | 417 | __vlan_device_event(dev, event); |
802fb176 | 418 | |
a9fde260 | 419 | grp = __vlan_find_group(dev); |
1da177e4 LT |
420 | if (!grp) |
421 | goto out; | |
422 | ||
423 | /* It is OK that we do not hold the group lock right now, | |
424 | * as we run under the RTNL lock. | |
425 | */ | |
426 | ||
427 | switch (event) { | |
428 | case NETDEV_CHANGE: | |
429 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 430 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 431 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
432 | if (!vlandev) |
433 | continue; | |
434 | ||
fc4a7489 | 435 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
436 | } |
437 | break; | |
438 | ||
8c979c26 PM |
439 | case NETDEV_CHANGEADDR: |
440 | /* Adjust unicast filters on underlying device */ | |
441 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
442 | vlandev = vlan_group_get_device(grp, i); | |
443 | if (!vlandev) | |
444 | continue; | |
445 | ||
d932e04a PM |
446 | flgs = vlandev->flags; |
447 | if (!(flgs & IFF_UP)) | |
448 | continue; | |
449 | ||
8c979c26 PM |
450 | vlan_sync_address(dev, vlandev); |
451 | } | |
2e477c9b HX |
452 | break; |
453 | ||
454 | case NETDEV_CHANGEMTU: | |
455 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
456 | vlandev = vlan_group_get_device(grp, i); | |
457 | if (!vlandev) | |
458 | continue; | |
459 | ||
460 | if (vlandev->mtu <= dev->mtu) | |
461 | continue; | |
462 | ||
463 | dev_set_mtu(vlandev, dev->mtu); | |
464 | } | |
8c979c26 PM |
465 | break; |
466 | ||
5fb13570 PM |
467 | case NETDEV_FEAT_CHANGE: |
468 | /* Propagate device features to underlying device */ | |
469 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
470 | vlandev = vlan_group_get_device(grp, i); | |
471 | if (!vlandev) | |
472 | continue; | |
473 | ||
474 | vlan_transfer_features(dev, vlandev); | |
475 | } | |
476 | ||
477 | break; | |
478 | ||
1da177e4 LT |
479 | case NETDEV_DOWN: |
480 | /* Put all VLANs for this dev in the down state too. */ | |
481 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 482 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
483 | if (!vlandev) |
484 | continue; | |
485 | ||
486 | flgs = vlandev->flags; | |
487 | if (!(flgs & IFF_UP)) | |
488 | continue; | |
489 | ||
5e756593 PM |
490 | vlan = vlan_dev_info(vlandev); |
491 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
492 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 493 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
494 | } |
495 | break; | |
496 | ||
497 | case NETDEV_UP: | |
498 | /* Put all VLANs for this dev in the up state too. */ | |
499 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 500 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
501 | if (!vlandev) |
502 | continue; | |
122952fc | 503 | |
1da177e4 LT |
504 | flgs = vlandev->flags; |
505 | if (flgs & IFF_UP) | |
506 | continue; | |
507 | ||
5e756593 PM |
508 | vlan = vlan_dev_info(vlandev); |
509 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
510 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 511 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
512 | } |
513 | break; | |
122952fc | 514 | |
1da177e4 | 515 | case NETDEV_UNREGISTER: |
29906f6a PM |
516 | /* Delete all VLANs for this dev. */ |
517 | grp->killall = 1; | |
518 | ||
519 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
520 | vlandev = vlan_group_get_device(grp, i); | |
521 | if (!vlandev) | |
522 | continue; | |
523 | ||
524 | /* unregistration of last vlan destroys group, abort | |
525 | * afterwards */ | |
526 | if (grp->nr_vlans == 1) | |
527 | i = VLAN_GROUP_ARRAY_LEN; | |
528 | ||
529 | unregister_vlan_dev(vlandev, &list); | |
530 | } | |
531 | unregister_netdevice_many(&list); | |
1da177e4 | 532 | break; |
3ff50b79 | 533 | } |
1da177e4 LT |
534 | |
535 | out: | |
536 | return NOTIFY_DONE; | |
537 | } | |
538 | ||
69ab4b7d PM |
539 | static struct notifier_block vlan_notifier_block __read_mostly = { |
540 | .notifier_call = vlan_device_event, | |
541 | }; | |
542 | ||
1da177e4 LT |
543 | /* |
544 | * VLAN IOCTL handler. | |
545 | * o execute requested action or pass command to the device driver | |
546 | * arg is really a struct vlan_ioctl_args __user *. | |
547 | */ | |
881d966b | 548 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 549 | { |
c17d8874 | 550 | int err; |
1da177e4 | 551 | struct vlan_ioctl_args args; |
c17d8874 | 552 | struct net_device *dev = NULL; |
1da177e4 LT |
553 | |
554 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
555 | return -EFAULT; | |
556 | ||
557 | /* Null terminate this sucker, just in case. */ | |
558 | args.device1[23] = 0; | |
559 | args.u.device2[23] = 0; | |
560 | ||
c17d8874 PM |
561 | rtnl_lock(); |
562 | ||
1da177e4 LT |
563 | switch (args.cmd) { |
564 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
565 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
566 | case SET_VLAN_FLAG_CMD: | |
567 | case ADD_VLAN_CMD: | |
568 | case DEL_VLAN_CMD: | |
569 | case GET_VLAN_REALDEV_NAME_CMD: | |
570 | case GET_VLAN_VID_CMD: | |
571 | err = -ENODEV; | |
65d292a2 | 572 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
573 | if (!dev) |
574 | goto out; | |
575 | ||
576 | err = -EINVAL; | |
26a25239 | 577 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
578 | goto out; |
579 | } | |
580 | ||
581 | switch (args.cmd) { | |
582 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
583 | err = -EPERM; | |
1da177e4 | 584 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
585 | break; |
586 | vlan_dev_set_ingress_priority(dev, | |
587 | args.u.skb_priority, | |
588 | args.vlan_qos); | |
fffe470a | 589 | err = 0; |
1da177e4 LT |
590 | break; |
591 | ||
592 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 593 | err = -EPERM; |
1da177e4 | 594 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
595 | break; |
596 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
597 | args.u.skb_priority, |
598 | args.vlan_qos); | |
599 | break; | |
600 | ||
601 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 602 | err = -EPERM; |
1da177e4 | 603 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 604 | break; |
b3ce0325 PM |
605 | err = vlan_dev_change_flags(dev, |
606 | args.vlan_qos ? args.u.flag : 0, | |
607 | args.u.flag); | |
1da177e4 LT |
608 | break; |
609 | ||
610 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 611 | err = -EPERM; |
1da177e4 | 612 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 613 | break; |
c17d8874 PM |
614 | if ((args.u.name_type >= 0) && |
615 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
616 | struct vlan_net *vn; |
617 | ||
618 | vn = net_generic(net, vlan_net_id); | |
619 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
620 | err = 0; |
621 | } else { | |
622 | err = -EINVAL; | |
623 | } | |
624 | break; | |
625 | ||
626 | case ADD_VLAN_CMD: | |
c17d8874 | 627 | err = -EPERM; |
1da177e4 | 628 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 629 | break; |
2ae0bf69 | 630 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
631 | break; |
632 | ||
633 | case DEL_VLAN_CMD: | |
c17d8874 | 634 | err = -EPERM; |
1da177e4 | 635 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 636 | break; |
23289a37 | 637 | unregister_vlan_dev(dev, NULL); |
af301517 | 638 | err = 0; |
1da177e4 LT |
639 | break; |
640 | ||
1da177e4 | 641 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 642 | err = 0; |
c17d8874 | 643 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 644 | if (copy_to_user(arg, &args, |
2029cc2c | 645 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 646 | err = -EFAULT; |
1da177e4 LT |
647 | break; |
648 | ||
649 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 650 | err = 0; |
22d1ba74 | 651 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 652 | if (copy_to_user(arg, &args, |
2029cc2c | 653 | sizeof(struct vlan_ioctl_args))) |
122952fc | 654 | err = -EFAULT; |
1da177e4 LT |
655 | break; |
656 | ||
657 | default: | |
198a291c | 658 | err = -EOPNOTSUPP; |
c17d8874 | 659 | break; |
3ff50b79 | 660 | } |
7eb1b3d3 | 661 | out: |
c17d8874 | 662 | rtnl_unlock(); |
1da177e4 LT |
663 | return err; |
664 | } | |
665 | ||
2c8c1e72 | 666 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 667 | { |
946d1a92 | 668 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 669 | int err; |
d9ed0f0e | 670 | |
7a17a2f7 PE |
671 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
672 | ||
cd1c7014 | 673 | err = vlan_proc_init(net); |
cd1c7014 | 674 | |
d9ed0f0e PE |
675 | return err; |
676 | } | |
677 | ||
2c8c1e72 | 678 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 679 | { |
cd1c7014 | 680 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
681 | } |
682 | ||
683 | static struct pernet_operations vlan_net_ops = { | |
684 | .init = vlan_init_net, | |
685 | .exit = vlan_exit_net, | |
946d1a92 EB |
686 | .id = &vlan_net_id, |
687 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
688 | }; |
689 | ||
69ab4b7d PM |
690 | static int __init vlan_proto_init(void) |
691 | { | |
692 | int err; | |
693 | ||
694 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
695 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
696 | ||
91e2ff35 | 697 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
698 | if (err < 0) |
699 | goto err0; | |
700 | ||
69ab4b7d PM |
701 | err = register_netdevice_notifier(&vlan_notifier_block); |
702 | if (err < 0) | |
703 | goto err2; | |
704 | ||
70c03b49 | 705 | err = vlan_gvrp_init(); |
69ab4b7d PM |
706 | if (err < 0) |
707 | goto err3; | |
708 | ||
70c03b49 PM |
709 | err = vlan_netlink_init(); |
710 | if (err < 0) | |
711 | goto err4; | |
712 | ||
69ab4b7d PM |
713 | dev_add_pack(&vlan_packet_type); |
714 | vlan_ioctl_set(vlan_ioctl_handler); | |
715 | return 0; | |
716 | ||
70c03b49 PM |
717 | err4: |
718 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
719 | err3: |
720 | unregister_netdevice_notifier(&vlan_notifier_block); | |
721 | err2: | |
91e2ff35 | 722 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 723 | err0: |
69ab4b7d PM |
724 | return err; |
725 | } | |
726 | ||
727 | static void __exit vlan_cleanup_module(void) | |
728 | { | |
729 | unsigned int i; | |
730 | ||
731 | vlan_ioctl_set(NULL); | |
732 | vlan_netlink_fini(); | |
733 | ||
734 | unregister_netdevice_notifier(&vlan_notifier_block); | |
735 | ||
736 | dev_remove_pack(&vlan_packet_type); | |
737 | ||
738 | /* This table must be empty if there are no module references left. */ | |
739 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) | |
740 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
741 | ||
91e2ff35 | 742 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 743 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
744 | |
745 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
746 | } |
747 | ||
748 | module_init(vlan_proto_init); | |
749 | module_exit(vlan_cleanup_module); | |
750 | ||
1da177e4 LT |
751 | MODULE_LICENSE("GPL"); |
752 | MODULE_VERSION(DRV_VERSION); |