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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> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
1da177e4 | 26 | #include <linux/init.h> |
82524746 | 27 | #include <linux/rculist.h> |
1da177e4 LT |
28 | #include <net/p8022.h> |
29 | #include <net/arp.h> | |
30 | #include <linux/rtnetlink.h> | |
31 | #include <linux/notifier.h> | |
61362766 | 32 | #include <net/rtnetlink.h> |
e9dc8653 | 33 | #include <net/net_namespace.h> |
d9ed0f0e | 34 | #include <net/netns/generic.h> |
61362766 | 35 | #include <asm/uaccess.h> |
1da177e4 LT |
36 | |
37 | #include <linux/if_vlan.h> | |
38 | #include "vlan.h" | |
39 | #include "vlanproc.h" | |
40 | ||
41 | #define DRV_VERSION "1.8" | |
42 | ||
43 | /* Global VLAN variables */ | |
44 | ||
f99189b1 | 45 | int vlan_net_id __read_mostly; |
d9ed0f0e | 46 | |
b3020061 SH |
47 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
48 | const char vlan_version[] = DRV_VERSION; | |
49 | static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
50 | static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
1da177e4 | 51 | |
1da177e4 LT |
52 | /* End of global variables definitions. */ |
53 | ||
5c15bdec DA |
54 | static void vlan_group_free(struct vlan_group *grp) |
55 | { | |
56 | int i; | |
57 | ||
2029cc2c | 58 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
5c15bdec DA |
59 | kfree(grp->vlan_devices_arrays[i]); |
60 | kfree(grp); | |
61 | } | |
62 | ||
a9fde260 | 63 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
42429aae PM |
64 | { |
65 | struct vlan_group *grp; | |
42429aae PM |
66 | |
67 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
68 | if (!grp) | |
69 | return NULL; | |
70 | ||
a9fde260 | 71 | grp->real_dev = real_dev; |
42429aae | 72 | return grp; |
67727184 | 73 | } |
42429aae | 74 | |
9bb8582e | 75 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
67727184 PE |
76 | { |
77 | struct net_device **array; | |
78 | unsigned int size; | |
79 | ||
80 | ASSERT_RTNL(); | |
81 | ||
9bb8582e | 82 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
67727184 PE |
83 | if (array != NULL) |
84 | return 0; | |
85 | ||
86 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
87 | array = kzalloc(size, GFP_KERNEL); | |
88 | if (array == NULL) | |
89 | return -ENOBUFS; | |
90 | ||
9bb8582e | 91 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
67727184 | 92 | return 0; |
42429aae PM |
93 | } |
94 | ||
1da177e4 LT |
95 | static void vlan_rcu_free(struct rcu_head *rcu) |
96 | { | |
5c15bdec | 97 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
98 | } |
99 | ||
23289a37 | 100 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 101 | { |
9dfebcc6 | 102 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
af301517 | 103 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 104 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 | 105 | struct vlan_group *grp; |
9bb8582e | 106 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
107 | |
108 | ASSERT_RTNL(); | |
acc5efbc | 109 | |
b616b09a | 110 | grp = rtnl_dereference(real_dev->vlgrp); |
af301517 | 111 | BUG_ON(!grp); |
acc5efbc | 112 | |
acc5efbc | 113 | /* Take it out of our own structures, but be sure to interlock with |
ad1afb00 PG |
114 | * HW accelerating devices or SW vlan input packet processing if |
115 | * VLAN is not 0 (leave it there for 802.1p). | |
acc5efbc | 116 | */ |
ad1afb00 | 117 | if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) |
656299f7 | 118 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 119 | |
af301517 | 120 | grp->nr_vlans--; |
acc5efbc | 121 | |
29906f6a PM |
122 | vlan_group_set_device(grp, vlan_id, NULL); |
123 | if (!grp->killall) | |
63c8099d | 124 | synchronize_net(); |
29906f6a | 125 | |
23289a37 | 126 | unregister_netdevice_queue(dev, head); |
ce305002 | 127 | |
acc5efbc | 128 | /* If the group is now empty, kill off the group. */ |
af301517 | 129 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
130 | vlan_gvrp_uninit_applicant(real_dev); |
131 | ||
65ac6a5f | 132 | rcu_assign_pointer(real_dev->vlgrp, NULL); |
3701e513 | 133 | if (ops->ndo_vlan_rx_register) |
656299f7 | 134 | ops->ndo_vlan_rx_register(real_dev, NULL); |
acc5efbc | 135 | |
acc5efbc PM |
136 | /* Free the group, after all cpu's are done. */ |
137 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
138 | } |
139 | ||
af301517 PM |
140 | /* Get rid of the vlan's reference to real_dev */ |
141 | dev_put(real_dev); | |
1da177e4 LT |
142 | } |
143 | ||
9bb8582e | 144 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 145 | { |
656299f7 SH |
146 | const char *name = real_dev->name; |
147 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 148 | |
1da177e4 | 149 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 150 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 151 | return -EOPNOTSUPP; |
1da177e4 LT |
152 | } |
153 | ||
1da177e4 | 154 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
656299f7 | 155 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
40f98e1a | 156 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 157 | return -EOPNOTSUPP; |
1da177e4 LT |
158 | } |
159 | ||
65ac6a5f | 160 | if (vlan_find_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 161 | return -EEXIST; |
1da177e4 | 162 | |
c1d3ee99 PM |
163 | return 0; |
164 | } | |
165 | ||
07b5b17e | 166 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 167 | { |
9dfebcc6 | 168 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 169 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 170 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 171 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
172 | struct vlan_group *grp, *ngrp = NULL; |
173 | int err; | |
174 | ||
b616b09a | 175 | grp = rtnl_dereference(real_dev->vlgrp); |
e89fe42c | 176 | if (!grp) { |
a9fde260 | 177 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
178 | if (!grp) |
179 | return -ENOBUFS; | |
70c03b49 PM |
180 | err = vlan_gvrp_init_applicant(real_dev); |
181 | if (err < 0) | |
182 | goto out_free_group; | |
e89fe42c PM |
183 | } |
184 | ||
67727184 PE |
185 | err = vlan_group_prealloc_vid(grp, vlan_id); |
186 | if (err < 0) | |
70c03b49 | 187 | goto out_uninit_applicant; |
67727184 | 188 | |
e89fe42c PM |
189 | err = register_netdevice(dev); |
190 | if (err < 0) | |
70c03b49 | 191 | goto out_uninit_applicant; |
e89fe42c PM |
192 | |
193 | /* Account for reference in struct vlan_dev_info */ | |
194 | dev_hold(real_dev); | |
195 | ||
fc4a7489 | 196 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
197 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
198 | ||
199 | /* So, got the sucker initialized, now lets place | |
200 | * it into our local structure. | |
201 | */ | |
202 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
203 | grp->nr_vlans++; |
204 | ||
65ac6a5f | 205 | if (ngrp) { |
3701e513 | 206 | if (ops->ndo_vlan_rx_register) |
65ac6a5f JG |
207 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
208 | rcu_assign_pointer(real_dev->vlgrp, ngrp); | |
209 | } | |
e89fe42c | 210 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 211 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 212 | |
e89fe42c PM |
213 | return 0; |
214 | ||
70c03b49 PM |
215 | out_uninit_applicant: |
216 | if (ngrp) | |
217 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c | 218 | out_free_group: |
6b863d1d | 219 | if (ngrp) { |
6b863d1d ED |
220 | /* Free the group, after all cpu's are done. */ |
221 | call_rcu(&ngrp->rcu, vlan_rcu_free); | |
222 | } | |
e89fe42c PM |
223 | return err; |
224 | } | |
225 | ||
c1d3ee99 | 226 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 227 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 228 | */ |
9bb8582e | 229 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 230 | { |
c1d3ee99 | 231 | struct net_device *new_dev; |
7a17a2f7 PE |
232 | struct net *net = dev_net(real_dev); |
233 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 234 | char name[IFNAMSIZ]; |
2ae0bf69 | 235 | int err; |
c1d3ee99 | 236 | |
9bb8582e | 237 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 238 | return -ERANGE; |
c1d3ee99 | 239 | |
9bb8582e | 240 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
241 | if (err < 0) |
242 | return err; | |
c1d3ee99 | 243 | |
1da177e4 | 244 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 245 | switch (vn->name_type) { |
1da177e4 LT |
246 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
247 | /* name will look like: eth1.0005 */ | |
9bb8582e | 248 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
249 | break; |
250 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
251 | /* Put our vlan.VID in the name. | |
252 | * Name will look like: vlan5 | |
253 | */ | |
9bb8582e | 254 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
255 | break; |
256 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
257 | /* Put our vlan.VID in the name. | |
258 | * Name will look like: eth0.5 | |
259 | */ | |
9bb8582e | 260 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
261 | break; |
262 | case VLAN_NAME_TYPE_PLUS_VID: | |
263 | /* Put our vlan.VID in the name. | |
264 | * Name will look like: vlan0005 | |
265 | */ | |
266 | default: | |
9bb8582e | 267 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 268 | } |
122952fc | 269 | |
4af429d2 | 270 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, vlan_setup); |
5dd8d1e9 | 271 | |
1da177e4 | 272 | if (new_dev == NULL) |
2ae0bf69 | 273 | return -ENOBUFS; |
1da177e4 | 274 | |
65d292a2 | 275 | dev_net_set(new_dev, net); |
1da177e4 LT |
276 | /* need 4 bytes for extra VLAN header info, |
277 | * hope the underlying device can handle it. | |
278 | */ | |
279 | new_dev->mtu = real_dev->mtu; | |
280 | ||
9bb8582e | 281 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
282 | vlan_dev_info(new_dev)->real_dev = real_dev; |
283 | vlan_dev_info(new_dev)->dent = NULL; | |
284 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 285 | |
07b5b17e | 286 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
287 | err = register_vlan_dev(new_dev); |
288 | if (err < 0) | |
e89fe42c | 289 | goto out_free_newdev; |
1da177e4 | 290 | |
2ae0bf69 | 291 | return 0; |
1da177e4 | 292 | |
1da177e4 LT |
293 | out_free_newdev: |
294 | free_netdev(new_dev); | |
2ae0bf69 | 295 | return err; |
1da177e4 LT |
296 | } |
297 | ||
8c979c26 PM |
298 | static void vlan_sync_address(struct net_device *dev, |
299 | struct net_device *vlandev) | |
300 | { | |
9dfebcc6 | 301 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
302 | |
303 | /* May be called without an actual change */ | |
304 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
305 | return; | |
306 | ||
307 | /* vlan address was different from the old address and is equal to | |
308 | * the new address */ | |
309 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
310 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 311 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
312 | |
313 | /* vlan address was equal to the old address and is different from | |
314 | * the new address */ | |
315 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
316 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 317 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 PM |
318 | |
319 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
320 | } | |
321 | ||
5fb13570 PM |
322 | static void vlan_transfer_features(struct net_device *dev, |
323 | struct net_device *vlandev) | |
324 | { | |
1ae4be22 | 325 | vlandev->gso_max_size = dev->gso_max_size; |
029f5fc3 JF |
326 | |
327 | if (dev->features & NETIF_F_HW_VLAN_TX) | |
328 | vlandev->hard_header_len = dev->hard_header_len; | |
329 | else | |
330 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
331 | ||
b85daa53 VD |
332 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
333 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
334 | #endif | |
8a0427bb MM |
335 | |
336 | netdev_update_features(vlandev); | |
5fb13570 PM |
337 | } |
338 | ||
802fb176 PE |
339 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
340 | { | |
341 | switch (event) { | |
342 | case NETDEV_CHANGENAME: | |
343 | vlan_proc_rem_dev(dev); | |
344 | if (vlan_proc_add_dev(dev) < 0) | |
345 | pr_warning("8021q: failed to change proc name for %s\n", | |
346 | dev->name); | |
347 | break; | |
30688a9a PE |
348 | case NETDEV_REGISTER: |
349 | if (vlan_proc_add_dev(dev) < 0) | |
350 | pr_warning("8021q: failed to add proc entry for %s\n", | |
351 | dev->name); | |
352 | break; | |
353 | case NETDEV_UNREGISTER: | |
354 | vlan_proc_rem_dev(dev); | |
355 | break; | |
802fb176 PE |
356 | } |
357 | } | |
358 | ||
2029cc2c PM |
359 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
360 | void *ptr) | |
1da177e4 LT |
361 | { |
362 | struct net_device *dev = ptr; | |
802fb176 | 363 | struct vlan_group *grp; |
1da177e4 LT |
364 | int i, flgs; |
365 | struct net_device *vlandev; | |
5e756593 | 366 | struct vlan_dev_info *vlan; |
29906f6a | 367 | LIST_HEAD(list); |
1da177e4 | 368 | |
81d85346 | 369 | if (is_vlan_dev(dev)) |
802fb176 | 370 | __vlan_device_event(dev, event); |
802fb176 | 371 | |
ad1afb00 PG |
372 | if ((event == NETDEV_UP) && |
373 | (dev->features & NETIF_F_HW_VLAN_FILTER) && | |
374 | dev->netdev_ops->ndo_vlan_rx_add_vid) { | |
375 | pr_info("8021q: adding VLAN 0 to HW filter on device %s\n", | |
376 | dev->name); | |
377 | dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); | |
378 | } | |
379 | ||
b616b09a | 380 | grp = rtnl_dereference(dev->vlgrp); |
1da177e4 LT |
381 | if (!grp) |
382 | goto out; | |
383 | ||
384 | /* It is OK that we do not hold the group lock right now, | |
385 | * as we run under the RTNL lock. | |
386 | */ | |
387 | ||
388 | switch (event) { | |
389 | case NETDEV_CHANGE: | |
390 | /* Propagate real device state to vlan devices */ | |
b738127d | 391 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 392 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
393 | if (!vlandev) |
394 | continue; | |
395 | ||
fc4a7489 | 396 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
397 | } |
398 | break; | |
399 | ||
8c979c26 PM |
400 | case NETDEV_CHANGEADDR: |
401 | /* Adjust unicast filters on underlying device */ | |
b738127d | 402 | for (i = 0; i < VLAN_N_VID; i++) { |
8c979c26 PM |
403 | vlandev = vlan_group_get_device(grp, i); |
404 | if (!vlandev) | |
405 | continue; | |
406 | ||
d932e04a PM |
407 | flgs = vlandev->flags; |
408 | if (!(flgs & IFF_UP)) | |
409 | continue; | |
410 | ||
8c979c26 PM |
411 | vlan_sync_address(dev, vlandev); |
412 | } | |
2e477c9b HX |
413 | break; |
414 | ||
415 | case NETDEV_CHANGEMTU: | |
b738127d | 416 | for (i = 0; i < VLAN_N_VID; i++) { |
2e477c9b HX |
417 | vlandev = vlan_group_get_device(grp, i); |
418 | if (!vlandev) | |
419 | continue; | |
420 | ||
421 | if (vlandev->mtu <= dev->mtu) | |
422 | continue; | |
423 | ||
424 | dev_set_mtu(vlandev, dev->mtu); | |
425 | } | |
8c979c26 PM |
426 | break; |
427 | ||
5fb13570 PM |
428 | case NETDEV_FEAT_CHANGE: |
429 | /* Propagate device features to underlying device */ | |
b738127d | 430 | for (i = 0; i < VLAN_N_VID; i++) { |
5fb13570 PM |
431 | vlandev = vlan_group_get_device(grp, i); |
432 | if (!vlandev) | |
433 | continue; | |
434 | ||
435 | vlan_transfer_features(dev, vlandev); | |
436 | } | |
437 | ||
438 | break; | |
439 | ||
1da177e4 LT |
440 | case NETDEV_DOWN: |
441 | /* Put all VLANs for this dev in the down state too. */ | |
b738127d | 442 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 443 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
444 | if (!vlandev) |
445 | continue; | |
446 | ||
447 | flgs = vlandev->flags; | |
448 | if (!(flgs & IFF_UP)) | |
449 | continue; | |
450 | ||
5e756593 PM |
451 | vlan = vlan_dev_info(vlandev); |
452 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
453 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 454 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
455 | } |
456 | break; | |
457 | ||
458 | case NETDEV_UP: | |
459 | /* Put all VLANs for this dev in the up state too. */ | |
b738127d | 460 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 461 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
462 | if (!vlandev) |
463 | continue; | |
122952fc | 464 | |
1da177e4 LT |
465 | flgs = vlandev->flags; |
466 | if (flgs & IFF_UP) | |
467 | continue; | |
468 | ||
5e756593 PM |
469 | vlan = vlan_dev_info(vlandev); |
470 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
471 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 472 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
473 | } |
474 | break; | |
122952fc | 475 | |
1da177e4 | 476 | case NETDEV_UNREGISTER: |
3b27e105 DL |
477 | /* twiddle thumbs on netns device moves */ |
478 | if (dev->reg_state != NETREG_UNREGISTERING) | |
479 | break; | |
480 | ||
29906f6a PM |
481 | /* Delete all VLANs for this dev. */ |
482 | grp->killall = 1; | |
483 | ||
b738127d | 484 | for (i = 0; i < VLAN_N_VID; i++) { |
29906f6a PM |
485 | vlandev = vlan_group_get_device(grp, i); |
486 | if (!vlandev) | |
487 | continue; | |
488 | ||
489 | /* unregistration of last vlan destroys group, abort | |
490 | * afterwards */ | |
491 | if (grp->nr_vlans == 1) | |
b738127d | 492 | i = VLAN_N_VID; |
29906f6a PM |
493 | |
494 | unregister_vlan_dev(vlandev, &list); | |
495 | } | |
496 | unregister_netdevice_many(&list); | |
1da177e4 | 497 | break; |
1c01fe14 JP |
498 | |
499 | case NETDEV_PRE_TYPE_CHANGE: | |
500 | /* Forbid underlaying device to change its type. */ | |
501 | return NOTIFY_BAD; | |
3ff50b79 | 502 | } |
1da177e4 LT |
503 | |
504 | out: | |
505 | return NOTIFY_DONE; | |
506 | } | |
507 | ||
69ab4b7d PM |
508 | static struct notifier_block vlan_notifier_block __read_mostly = { |
509 | .notifier_call = vlan_device_event, | |
510 | }; | |
511 | ||
1da177e4 LT |
512 | /* |
513 | * VLAN IOCTL handler. | |
514 | * o execute requested action or pass command to the device driver | |
515 | * arg is really a struct vlan_ioctl_args __user *. | |
516 | */ | |
881d966b | 517 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 518 | { |
c17d8874 | 519 | int err; |
1da177e4 | 520 | struct vlan_ioctl_args args; |
c17d8874 | 521 | struct net_device *dev = NULL; |
1da177e4 LT |
522 | |
523 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
524 | return -EFAULT; | |
525 | ||
526 | /* Null terminate this sucker, just in case. */ | |
527 | args.device1[23] = 0; | |
528 | args.u.device2[23] = 0; | |
529 | ||
c17d8874 PM |
530 | rtnl_lock(); |
531 | ||
1da177e4 LT |
532 | switch (args.cmd) { |
533 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
534 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
535 | case SET_VLAN_FLAG_CMD: | |
536 | case ADD_VLAN_CMD: | |
537 | case DEL_VLAN_CMD: | |
538 | case GET_VLAN_REALDEV_NAME_CMD: | |
539 | case GET_VLAN_VID_CMD: | |
540 | err = -ENODEV; | |
65d292a2 | 541 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
542 | if (!dev) |
543 | goto out; | |
544 | ||
545 | err = -EINVAL; | |
26a25239 | 546 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
547 | goto out; |
548 | } | |
549 | ||
550 | switch (args.cmd) { | |
551 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
552 | err = -EPERM; | |
1da177e4 | 553 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
554 | break; |
555 | vlan_dev_set_ingress_priority(dev, | |
556 | args.u.skb_priority, | |
557 | args.vlan_qos); | |
fffe470a | 558 | err = 0; |
1da177e4 LT |
559 | break; |
560 | ||
561 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 562 | err = -EPERM; |
1da177e4 | 563 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
564 | break; |
565 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
566 | args.u.skb_priority, |
567 | args.vlan_qos); | |
568 | break; | |
569 | ||
570 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 571 | err = -EPERM; |
1da177e4 | 572 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 573 | break; |
b3ce0325 PM |
574 | err = vlan_dev_change_flags(dev, |
575 | args.vlan_qos ? args.u.flag : 0, | |
576 | args.u.flag); | |
1da177e4 LT |
577 | break; |
578 | ||
579 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 580 | err = -EPERM; |
1da177e4 | 581 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 582 | break; |
c17d8874 PM |
583 | if ((args.u.name_type >= 0) && |
584 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
585 | struct vlan_net *vn; |
586 | ||
587 | vn = net_generic(net, vlan_net_id); | |
588 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
589 | err = 0; |
590 | } else { | |
591 | err = -EINVAL; | |
592 | } | |
593 | break; | |
594 | ||
595 | case ADD_VLAN_CMD: | |
c17d8874 | 596 | err = -EPERM; |
1da177e4 | 597 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 598 | break; |
2ae0bf69 | 599 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
600 | break; |
601 | ||
602 | case DEL_VLAN_CMD: | |
c17d8874 | 603 | err = -EPERM; |
1da177e4 | 604 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 605 | break; |
23289a37 | 606 | unregister_vlan_dev(dev, NULL); |
af301517 | 607 | err = 0; |
1da177e4 LT |
608 | break; |
609 | ||
1da177e4 | 610 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 611 | err = 0; |
c17d8874 | 612 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 613 | if (copy_to_user(arg, &args, |
2029cc2c | 614 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 615 | err = -EFAULT; |
1da177e4 LT |
616 | break; |
617 | ||
618 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 619 | err = 0; |
22d1ba74 | 620 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 621 | if (copy_to_user(arg, &args, |
2029cc2c | 622 | sizeof(struct vlan_ioctl_args))) |
122952fc | 623 | err = -EFAULT; |
1da177e4 LT |
624 | break; |
625 | ||
626 | default: | |
198a291c | 627 | err = -EOPNOTSUPP; |
c17d8874 | 628 | break; |
3ff50b79 | 629 | } |
7eb1b3d3 | 630 | out: |
c17d8874 | 631 | rtnl_unlock(); |
1da177e4 LT |
632 | return err; |
633 | } | |
634 | ||
2c8c1e72 | 635 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 636 | { |
946d1a92 | 637 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 638 | int err; |
d9ed0f0e | 639 | |
7a17a2f7 PE |
640 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
641 | ||
cd1c7014 | 642 | err = vlan_proc_init(net); |
cd1c7014 | 643 | |
d9ed0f0e PE |
644 | return err; |
645 | } | |
646 | ||
2c8c1e72 | 647 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 648 | { |
cd1c7014 | 649 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
650 | } |
651 | ||
652 | static struct pernet_operations vlan_net_ops = { | |
653 | .init = vlan_init_net, | |
654 | .exit = vlan_exit_net, | |
946d1a92 EB |
655 | .id = &vlan_net_id, |
656 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
657 | }; |
658 | ||
69ab4b7d PM |
659 | static int __init vlan_proto_init(void) |
660 | { | |
661 | int err; | |
662 | ||
663 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
664 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
665 | ||
91e2ff35 | 666 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
667 | if (err < 0) |
668 | goto err0; | |
669 | ||
69ab4b7d PM |
670 | err = register_netdevice_notifier(&vlan_notifier_block); |
671 | if (err < 0) | |
672 | goto err2; | |
673 | ||
70c03b49 | 674 | err = vlan_gvrp_init(); |
69ab4b7d PM |
675 | if (err < 0) |
676 | goto err3; | |
677 | ||
70c03b49 PM |
678 | err = vlan_netlink_init(); |
679 | if (err < 0) | |
680 | goto err4; | |
681 | ||
69ab4b7d PM |
682 | vlan_ioctl_set(vlan_ioctl_handler); |
683 | return 0; | |
684 | ||
70c03b49 PM |
685 | err4: |
686 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
687 | err3: |
688 | unregister_netdevice_notifier(&vlan_notifier_block); | |
689 | err2: | |
91e2ff35 | 690 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 691 | err0: |
69ab4b7d PM |
692 | return err; |
693 | } | |
694 | ||
695 | static void __exit vlan_cleanup_module(void) | |
696 | { | |
69ab4b7d PM |
697 | vlan_ioctl_set(NULL); |
698 | vlan_netlink_fini(); | |
699 | ||
700 | unregister_netdevice_notifier(&vlan_notifier_block); | |
701 | ||
91e2ff35 | 702 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 703 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
704 | |
705 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
706 | } |
707 | ||
708 | module_init(vlan_proto_init); | |
709 | module_exit(vlan_cleanup_module); | |
710 | ||
1da177e4 LT |
711 | MODULE_LICENSE("GPL"); |
712 | MODULE_VERSION(DRV_VERSION); |