]>
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> | |
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; | |
1da177e4 | 49 | |
1da177e4 LT |
50 | /* End of global variables definitions. */ |
51 | ||
5c15bdec DA |
52 | static void vlan_group_free(struct vlan_group *grp) |
53 | { | |
54 | int i; | |
55 | ||
2029cc2c | 56 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
5c15bdec DA |
57 | kfree(grp->vlan_devices_arrays[i]); |
58 | kfree(grp); | |
59 | } | |
60 | ||
a9fde260 | 61 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
42429aae PM |
62 | { |
63 | struct vlan_group *grp; | |
42429aae PM |
64 | |
65 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
66 | if (!grp) | |
67 | return NULL; | |
68 | ||
a9fde260 | 69 | grp->real_dev = real_dev; |
42429aae | 70 | return grp; |
67727184 | 71 | } |
42429aae | 72 | |
9bb8582e | 73 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
67727184 PE |
74 | { |
75 | struct net_device **array; | |
76 | unsigned int size; | |
77 | ||
78 | ASSERT_RTNL(); | |
79 | ||
9bb8582e | 80 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
67727184 PE |
81 | if (array != NULL) |
82 | return 0; | |
83 | ||
84 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
85 | array = kzalloc(size, GFP_KERNEL); | |
86 | if (array == NULL) | |
87 | return -ENOBUFS; | |
88 | ||
9bb8582e | 89 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
67727184 | 90 | return 0; |
42429aae PM |
91 | } |
92 | ||
1da177e4 LT |
93 | static void vlan_rcu_free(struct rcu_head *rcu) |
94 | { | |
5c15bdec | 95 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
96 | } |
97 | ||
23289a37 | 98 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 99 | { |
9dfebcc6 | 100 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
af301517 | 101 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 102 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 | 103 | struct vlan_group *grp; |
9bb8582e | 104 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
105 | |
106 | ASSERT_RTNL(); | |
acc5efbc | 107 | |
b616b09a | 108 | grp = rtnl_dereference(real_dev->vlgrp); |
af301517 | 109 | BUG_ON(!grp); |
acc5efbc | 110 | |
acc5efbc | 111 | /* Take it out of our own structures, but be sure to interlock with |
ad1afb00 PG |
112 | * HW accelerating devices or SW vlan input packet processing if |
113 | * VLAN is not 0 (leave it there for 802.1p). | |
acc5efbc | 114 | */ |
ad1afb00 | 115 | if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) |
656299f7 | 116 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 117 | |
af301517 | 118 | grp->nr_vlans--; |
acc5efbc | 119 | |
55aee10d ED |
120 | if (vlan->flags & VLAN_FLAG_GVRP) |
121 | vlan_gvrp_request_leave(dev); | |
122 | ||
29906f6a | 123 | vlan_group_set_device(grp, vlan_id, NULL); |
48752e1b ED |
124 | /* Because unregister_netdevice_queue() makes sure at least one rcu |
125 | * grace period is respected before device freeing, | |
126 | * we dont need to call synchronize_net() here. | |
127 | */ | |
23289a37 | 128 | unregister_netdevice_queue(dev, head); |
ce305002 | 129 | |
acc5efbc | 130 | /* If the group is now empty, kill off the group. */ |
af301517 | 131 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
132 | vlan_gvrp_uninit_applicant(real_dev); |
133 | ||
65ac6a5f | 134 | rcu_assign_pointer(real_dev->vlgrp, NULL); |
3701e513 | 135 | if (ops->ndo_vlan_rx_register) |
656299f7 | 136 | ops->ndo_vlan_rx_register(real_dev, NULL); |
acc5efbc | 137 | |
acc5efbc PM |
138 | /* Free the group, after all cpu's are done. */ |
139 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
140 | } |
141 | ||
af301517 PM |
142 | /* Get rid of the vlan's reference to real_dev */ |
143 | dev_put(real_dev); | |
1da177e4 LT |
144 | } |
145 | ||
9bb8582e | 146 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 147 | { |
656299f7 SH |
148 | const char *name = real_dev->name; |
149 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 150 | |
1da177e4 | 151 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 152 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 153 | return -EOPNOTSUPP; |
1da177e4 LT |
154 | } |
155 | ||
1da177e4 | 156 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
656299f7 | 157 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
40f98e1a | 158 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 159 | return -EOPNOTSUPP; |
1da177e4 LT |
160 | } |
161 | ||
65ac6a5f | 162 | if (vlan_find_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 163 | return -EEXIST; |
1da177e4 | 164 | |
c1d3ee99 PM |
165 | return 0; |
166 | } | |
167 | ||
07b5b17e | 168 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 169 | { |
9dfebcc6 | 170 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 171 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 172 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 173 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
174 | struct vlan_group *grp, *ngrp = NULL; |
175 | int err; | |
176 | ||
b616b09a | 177 | grp = rtnl_dereference(real_dev->vlgrp); |
e89fe42c | 178 | if (!grp) { |
a9fde260 | 179 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
180 | if (!grp) |
181 | return -ENOBUFS; | |
70c03b49 PM |
182 | err = vlan_gvrp_init_applicant(real_dev); |
183 | if (err < 0) | |
184 | goto out_free_group; | |
e89fe42c PM |
185 | } |
186 | ||
67727184 PE |
187 | err = vlan_group_prealloc_vid(grp, vlan_id); |
188 | if (err < 0) | |
70c03b49 | 189 | goto out_uninit_applicant; |
67727184 | 190 | |
e89fe42c PM |
191 | err = register_netdevice(dev); |
192 | if (err < 0) | |
70c03b49 | 193 | goto out_uninit_applicant; |
e89fe42c PM |
194 | |
195 | /* Account for reference in struct vlan_dev_info */ | |
196 | dev_hold(real_dev); | |
197 | ||
fc4a7489 | 198 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
199 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
200 | ||
201 | /* So, got the sucker initialized, now lets place | |
202 | * it into our local structure. | |
203 | */ | |
204 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
205 | grp->nr_vlans++; |
206 | ||
65ac6a5f | 207 | if (ngrp) { |
3701e513 | 208 | if (ops->ndo_vlan_rx_register) |
65ac6a5f JG |
209 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
210 | rcu_assign_pointer(real_dev->vlgrp, ngrp); | |
211 | } | |
e89fe42c | 212 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 213 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 214 | |
e89fe42c PM |
215 | return 0; |
216 | ||
70c03b49 PM |
217 | out_uninit_applicant: |
218 | if (ngrp) | |
219 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c | 220 | out_free_group: |
6b863d1d | 221 | if (ngrp) { |
6b863d1d ED |
222 | /* Free the group, after all cpu's are done. */ |
223 | call_rcu(&ngrp->rcu, vlan_rcu_free); | |
224 | } | |
e89fe42c PM |
225 | return err; |
226 | } | |
227 | ||
c1d3ee99 | 228 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 229 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 230 | */ |
9bb8582e | 231 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 232 | { |
c1d3ee99 | 233 | struct net_device *new_dev; |
7a17a2f7 PE |
234 | struct net *net = dev_net(real_dev); |
235 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 236 | char name[IFNAMSIZ]; |
2ae0bf69 | 237 | int err; |
c1d3ee99 | 238 | |
9bb8582e | 239 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 240 | return -ERANGE; |
c1d3ee99 | 241 | |
9bb8582e | 242 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
243 | if (err < 0) |
244 | return err; | |
c1d3ee99 | 245 | |
1da177e4 | 246 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 247 | switch (vn->name_type) { |
1da177e4 LT |
248 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
249 | /* name will look like: eth1.0005 */ | |
9bb8582e | 250 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
251 | break; |
252 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
253 | /* Put our vlan.VID in the name. | |
254 | * Name will look like: vlan5 | |
255 | */ | |
9bb8582e | 256 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
257 | break; |
258 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
259 | /* Put our vlan.VID in the name. | |
260 | * Name will look like: eth0.5 | |
261 | */ | |
9bb8582e | 262 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
263 | break; |
264 | case VLAN_NAME_TYPE_PLUS_VID: | |
265 | /* Put our vlan.VID in the name. | |
266 | * Name will look like: vlan0005 | |
267 | */ | |
268 | default: | |
9bb8582e | 269 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 270 | } |
122952fc | 271 | |
4af429d2 | 272 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, vlan_setup); |
5dd8d1e9 | 273 | |
1da177e4 | 274 | if (new_dev == NULL) |
2ae0bf69 | 275 | return -ENOBUFS; |
1da177e4 | 276 | |
65d292a2 | 277 | dev_net_set(new_dev, net); |
1da177e4 LT |
278 | /* need 4 bytes for extra VLAN header info, |
279 | * hope the underlying device can handle it. | |
280 | */ | |
281 | new_dev->mtu = real_dev->mtu; | |
282 | ||
9bb8582e | 283 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
284 | vlan_dev_info(new_dev)->real_dev = real_dev; |
285 | vlan_dev_info(new_dev)->dent = NULL; | |
286 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 287 | |
07b5b17e | 288 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
289 | err = register_vlan_dev(new_dev); |
290 | if (err < 0) | |
e89fe42c | 291 | goto out_free_newdev; |
1da177e4 | 292 | |
2ae0bf69 | 293 | return 0; |
1da177e4 | 294 | |
1da177e4 LT |
295 | out_free_newdev: |
296 | free_netdev(new_dev); | |
2ae0bf69 | 297 | return err; |
1da177e4 LT |
298 | } |
299 | ||
8c979c26 PM |
300 | static void vlan_sync_address(struct net_device *dev, |
301 | struct net_device *vlandev) | |
302 | { | |
9dfebcc6 | 303 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
304 | |
305 | /* May be called without an actual change */ | |
306 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
307 | return; | |
308 | ||
309 | /* vlan address was different from the old address and is equal to | |
310 | * the new address */ | |
311 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
312 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 313 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
314 | |
315 | /* vlan address was equal to the old address and is different from | |
316 | * the new address */ | |
317 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
318 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 319 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 PM |
320 | |
321 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
322 | } | |
323 | ||
5fb13570 PM |
324 | static void vlan_transfer_features(struct net_device *dev, |
325 | struct net_device *vlandev) | |
326 | { | |
1ae4be22 | 327 | vlandev->gso_max_size = dev->gso_max_size; |
029f5fc3 JF |
328 | |
329 | if (dev->features & NETIF_F_HW_VLAN_TX) | |
330 | vlandev->hard_header_len = dev->hard_header_len; | |
331 | else | |
332 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
333 | ||
b85daa53 VD |
334 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
335 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
336 | #endif | |
8a0427bb MM |
337 | |
338 | netdev_update_features(vlandev); | |
5fb13570 PM |
339 | } |
340 | ||
802fb176 PE |
341 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
342 | { | |
343 | switch (event) { | |
344 | case NETDEV_CHANGENAME: | |
345 | vlan_proc_rem_dev(dev); | |
346 | if (vlan_proc_add_dev(dev) < 0) | |
347 | pr_warning("8021q: failed to change proc name for %s\n", | |
348 | dev->name); | |
349 | break; | |
30688a9a PE |
350 | case NETDEV_REGISTER: |
351 | if (vlan_proc_add_dev(dev) < 0) | |
352 | pr_warning("8021q: failed to add proc entry for %s\n", | |
353 | dev->name); | |
354 | break; | |
355 | case NETDEV_UNREGISTER: | |
356 | vlan_proc_rem_dev(dev); | |
357 | break; | |
802fb176 PE |
358 | } |
359 | } | |
360 | ||
2029cc2c PM |
361 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
362 | void *ptr) | |
1da177e4 LT |
363 | { |
364 | struct net_device *dev = ptr; | |
802fb176 | 365 | struct vlan_group *grp; |
1da177e4 LT |
366 | int i, flgs; |
367 | struct net_device *vlandev; | |
5e756593 | 368 | struct vlan_dev_info *vlan; |
29906f6a | 369 | LIST_HEAD(list); |
1da177e4 | 370 | |
81d85346 | 371 | if (is_vlan_dev(dev)) |
802fb176 | 372 | __vlan_device_event(dev, event); |
802fb176 | 373 | |
ad1afb00 PG |
374 | if ((event == NETDEV_UP) && |
375 | (dev->features & NETIF_F_HW_VLAN_FILTER) && | |
376 | dev->netdev_ops->ndo_vlan_rx_add_vid) { | |
377 | pr_info("8021q: adding VLAN 0 to HW filter on device %s\n", | |
378 | dev->name); | |
379 | dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); | |
380 | } | |
381 | ||
b616b09a | 382 | grp = rtnl_dereference(dev->vlgrp); |
1da177e4 LT |
383 | if (!grp) |
384 | goto out; | |
385 | ||
386 | /* It is OK that we do not hold the group lock right now, | |
387 | * as we run under the RTNL lock. | |
388 | */ | |
389 | ||
390 | switch (event) { | |
391 | case NETDEV_CHANGE: | |
392 | /* Propagate real device state to vlan devices */ | |
b738127d | 393 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 394 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
395 | if (!vlandev) |
396 | continue; | |
397 | ||
fc4a7489 | 398 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
399 | } |
400 | break; | |
401 | ||
8c979c26 PM |
402 | case NETDEV_CHANGEADDR: |
403 | /* Adjust unicast filters on underlying device */ | |
b738127d | 404 | for (i = 0; i < VLAN_N_VID; i++) { |
8c979c26 PM |
405 | vlandev = vlan_group_get_device(grp, i); |
406 | if (!vlandev) | |
407 | continue; | |
408 | ||
d932e04a PM |
409 | flgs = vlandev->flags; |
410 | if (!(flgs & IFF_UP)) | |
411 | continue; | |
412 | ||
8c979c26 PM |
413 | vlan_sync_address(dev, vlandev); |
414 | } | |
2e477c9b HX |
415 | break; |
416 | ||
417 | case NETDEV_CHANGEMTU: | |
b738127d | 418 | for (i = 0; i < VLAN_N_VID; i++) { |
2e477c9b HX |
419 | vlandev = vlan_group_get_device(grp, i); |
420 | if (!vlandev) | |
421 | continue; | |
422 | ||
423 | if (vlandev->mtu <= dev->mtu) | |
424 | continue; | |
425 | ||
426 | dev_set_mtu(vlandev, dev->mtu); | |
427 | } | |
8c979c26 PM |
428 | break; |
429 | ||
5fb13570 PM |
430 | case NETDEV_FEAT_CHANGE: |
431 | /* Propagate device features to underlying device */ | |
b738127d | 432 | for (i = 0; i < VLAN_N_VID; i++) { |
5fb13570 PM |
433 | vlandev = vlan_group_get_device(grp, i); |
434 | if (!vlandev) | |
435 | continue; | |
436 | ||
437 | vlan_transfer_features(dev, vlandev); | |
438 | } | |
439 | ||
440 | break; | |
441 | ||
1da177e4 LT |
442 | case NETDEV_DOWN: |
443 | /* Put all VLANs for this dev in the down state too. */ | |
b738127d | 444 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 445 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
446 | if (!vlandev) |
447 | continue; | |
448 | ||
449 | flgs = vlandev->flags; | |
450 | if (!(flgs & IFF_UP)) | |
451 | continue; | |
452 | ||
5e756593 PM |
453 | vlan = vlan_dev_info(vlandev); |
454 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
455 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 456 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
457 | } |
458 | break; | |
459 | ||
460 | case NETDEV_UP: | |
461 | /* Put all VLANs for this dev in the up state too. */ | |
b738127d | 462 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 463 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
464 | if (!vlandev) |
465 | continue; | |
122952fc | 466 | |
1da177e4 LT |
467 | flgs = vlandev->flags; |
468 | if (flgs & IFF_UP) | |
469 | continue; | |
470 | ||
5e756593 PM |
471 | vlan = vlan_dev_info(vlandev); |
472 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
473 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 474 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
475 | } |
476 | break; | |
122952fc | 477 | |
1da177e4 | 478 | case NETDEV_UNREGISTER: |
3b27e105 DL |
479 | /* twiddle thumbs on netns device moves */ |
480 | if (dev->reg_state != NETREG_UNREGISTERING) | |
481 | break; | |
482 | ||
b738127d | 483 | for (i = 0; i < VLAN_N_VID; i++) { |
29906f6a PM |
484 | vlandev = vlan_group_get_device(grp, i); |
485 | if (!vlandev) | |
486 | continue; | |
487 | ||
488 | /* unregistration of last vlan destroys group, abort | |
489 | * afterwards */ | |
490 | if (grp->nr_vlans == 1) | |
b738127d | 491 | i = VLAN_N_VID; |
29906f6a PM |
492 | |
493 | unregister_vlan_dev(vlandev, &list); | |
494 | } | |
495 | unregister_netdevice_many(&list); | |
1da177e4 | 496 | break; |
1c01fe14 JP |
497 | |
498 | case NETDEV_PRE_TYPE_CHANGE: | |
499 | /* Forbid underlaying device to change its type. */ | |
500 | return NOTIFY_BAD; | |
99606477 BH |
501 | |
502 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 503 | case NETDEV_BONDING_FAILOVER: |
99606477 BH |
504 | /* Propagate to vlan devices */ |
505 | for (i = 0; i < VLAN_N_VID; i++) { | |
506 | vlandev = vlan_group_get_device(grp, i); | |
507 | if (!vlandev) | |
508 | continue; | |
509 | ||
7c899432 | 510 | call_netdevice_notifiers(event, vlandev); |
99606477 BH |
511 | } |
512 | break; | |
3ff50b79 | 513 | } |
1da177e4 LT |
514 | |
515 | out: | |
516 | return NOTIFY_DONE; | |
517 | } | |
518 | ||
69ab4b7d PM |
519 | static struct notifier_block vlan_notifier_block __read_mostly = { |
520 | .notifier_call = vlan_device_event, | |
521 | }; | |
522 | ||
1da177e4 LT |
523 | /* |
524 | * VLAN IOCTL handler. | |
525 | * o execute requested action or pass command to the device driver | |
526 | * arg is really a struct vlan_ioctl_args __user *. | |
527 | */ | |
881d966b | 528 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 529 | { |
c17d8874 | 530 | int err; |
1da177e4 | 531 | struct vlan_ioctl_args args; |
c17d8874 | 532 | struct net_device *dev = NULL; |
1da177e4 LT |
533 | |
534 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
535 | return -EFAULT; | |
536 | ||
537 | /* Null terminate this sucker, just in case. */ | |
538 | args.device1[23] = 0; | |
539 | args.u.device2[23] = 0; | |
540 | ||
c17d8874 PM |
541 | rtnl_lock(); |
542 | ||
1da177e4 LT |
543 | switch (args.cmd) { |
544 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
545 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
546 | case SET_VLAN_FLAG_CMD: | |
547 | case ADD_VLAN_CMD: | |
548 | case DEL_VLAN_CMD: | |
549 | case GET_VLAN_REALDEV_NAME_CMD: | |
550 | case GET_VLAN_VID_CMD: | |
551 | err = -ENODEV; | |
65d292a2 | 552 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
553 | if (!dev) |
554 | goto out; | |
555 | ||
556 | err = -EINVAL; | |
26a25239 | 557 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
558 | goto out; |
559 | } | |
560 | ||
561 | switch (args.cmd) { | |
562 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
563 | err = -EPERM; | |
1da177e4 | 564 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
565 | break; |
566 | vlan_dev_set_ingress_priority(dev, | |
567 | args.u.skb_priority, | |
568 | args.vlan_qos); | |
fffe470a | 569 | err = 0; |
1da177e4 LT |
570 | break; |
571 | ||
572 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 573 | err = -EPERM; |
1da177e4 | 574 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
575 | break; |
576 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
577 | args.u.skb_priority, |
578 | args.vlan_qos); | |
579 | break; | |
580 | ||
581 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 582 | err = -EPERM; |
1da177e4 | 583 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 584 | break; |
b3ce0325 PM |
585 | err = vlan_dev_change_flags(dev, |
586 | args.vlan_qos ? args.u.flag : 0, | |
587 | args.u.flag); | |
1da177e4 LT |
588 | break; |
589 | ||
590 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 591 | err = -EPERM; |
1da177e4 | 592 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 593 | break; |
c17d8874 PM |
594 | if ((args.u.name_type >= 0) && |
595 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
596 | struct vlan_net *vn; |
597 | ||
598 | vn = net_generic(net, vlan_net_id); | |
599 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
600 | err = 0; |
601 | } else { | |
602 | err = -EINVAL; | |
603 | } | |
604 | break; | |
605 | ||
606 | case ADD_VLAN_CMD: | |
c17d8874 | 607 | err = -EPERM; |
1da177e4 | 608 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 609 | break; |
2ae0bf69 | 610 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
611 | break; |
612 | ||
613 | case DEL_VLAN_CMD: | |
c17d8874 | 614 | err = -EPERM; |
1da177e4 | 615 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 616 | break; |
23289a37 | 617 | unregister_vlan_dev(dev, NULL); |
af301517 | 618 | err = 0; |
1da177e4 LT |
619 | break; |
620 | ||
1da177e4 | 621 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 622 | err = 0; |
c17d8874 | 623 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 624 | if (copy_to_user(arg, &args, |
2029cc2c | 625 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 626 | err = -EFAULT; |
1da177e4 LT |
627 | break; |
628 | ||
629 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 630 | err = 0; |
22d1ba74 | 631 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 632 | if (copy_to_user(arg, &args, |
2029cc2c | 633 | sizeof(struct vlan_ioctl_args))) |
122952fc | 634 | err = -EFAULT; |
1da177e4 LT |
635 | break; |
636 | ||
637 | default: | |
198a291c | 638 | err = -EOPNOTSUPP; |
c17d8874 | 639 | break; |
3ff50b79 | 640 | } |
7eb1b3d3 | 641 | out: |
c17d8874 | 642 | rtnl_unlock(); |
1da177e4 LT |
643 | return err; |
644 | } | |
645 | ||
2c8c1e72 | 646 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 647 | { |
946d1a92 | 648 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 649 | int err; |
d9ed0f0e | 650 | |
7a17a2f7 PE |
651 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
652 | ||
cd1c7014 | 653 | err = vlan_proc_init(net); |
cd1c7014 | 654 | |
d9ed0f0e PE |
655 | return err; |
656 | } | |
657 | ||
2c8c1e72 | 658 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 659 | { |
cd1c7014 | 660 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
661 | } |
662 | ||
663 | static struct pernet_operations vlan_net_ops = { | |
664 | .init = vlan_init_net, | |
665 | .exit = vlan_exit_net, | |
946d1a92 EB |
666 | .id = &vlan_net_id, |
667 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
668 | }; |
669 | ||
69ab4b7d PM |
670 | static int __init vlan_proto_init(void) |
671 | { | |
672 | int err; | |
673 | ||
da7c06c4 | 674 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 675 | |
91e2ff35 | 676 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
677 | if (err < 0) |
678 | goto err0; | |
679 | ||
69ab4b7d PM |
680 | err = register_netdevice_notifier(&vlan_notifier_block); |
681 | if (err < 0) | |
682 | goto err2; | |
683 | ||
70c03b49 | 684 | err = vlan_gvrp_init(); |
69ab4b7d PM |
685 | if (err < 0) |
686 | goto err3; | |
687 | ||
70c03b49 PM |
688 | err = vlan_netlink_init(); |
689 | if (err < 0) | |
690 | goto err4; | |
691 | ||
69ab4b7d PM |
692 | vlan_ioctl_set(vlan_ioctl_handler); |
693 | return 0; | |
694 | ||
70c03b49 PM |
695 | err4: |
696 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
697 | err3: |
698 | unregister_netdevice_notifier(&vlan_notifier_block); | |
699 | err2: | |
91e2ff35 | 700 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 701 | err0: |
69ab4b7d PM |
702 | return err; |
703 | } | |
704 | ||
705 | static void __exit vlan_cleanup_module(void) | |
706 | { | |
69ab4b7d PM |
707 | vlan_ioctl_set(NULL); |
708 | vlan_netlink_fini(); | |
709 | ||
710 | unregister_netdevice_notifier(&vlan_notifier_block); | |
711 | ||
91e2ff35 | 712 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 713 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
714 | |
715 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
716 | } |
717 | ||
718 | module_init(vlan_proto_init); | |
719 | module_exit(vlan_cleanup_module); | |
720 | ||
1da177e4 LT |
721 | MODULE_LICENSE("GPL"); |
722 | MODULE_VERSION(DRV_VERSION); |