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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 | |
7546dd97 | 52 | static struct packet_type vlan_packet_type __read_mostly = { |
09640e63 | 53 | .type = cpu_to_be16(ETH_P_8021Q), |
1da177e4 LT |
54 | .func = vlan_skb_recv, /* VLAN receive method */ |
55 | }; | |
56 | ||
1da177e4 LT |
57 | /* End of global variables definitions. */ |
58 | ||
5c15bdec DA |
59 | static void vlan_group_free(struct vlan_group *grp) |
60 | { | |
61 | int i; | |
62 | ||
2029cc2c | 63 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
5c15bdec DA |
64 | kfree(grp->vlan_devices_arrays[i]); |
65 | kfree(grp); | |
66 | } | |
67 | ||
a9fde260 | 68 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
42429aae PM |
69 | { |
70 | struct vlan_group *grp; | |
42429aae PM |
71 | |
72 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
73 | if (!grp) | |
74 | return NULL; | |
75 | ||
a9fde260 | 76 | grp->real_dev = real_dev; |
42429aae | 77 | return grp; |
67727184 | 78 | } |
42429aae | 79 | |
9bb8582e | 80 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
67727184 PE |
81 | { |
82 | struct net_device **array; | |
83 | unsigned int size; | |
84 | ||
85 | ASSERT_RTNL(); | |
86 | ||
9bb8582e | 87 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
67727184 PE |
88 | if (array != NULL) |
89 | return 0; | |
90 | ||
91 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
92 | array = kzalloc(size, GFP_KERNEL); | |
93 | if (array == NULL) | |
94 | return -ENOBUFS; | |
95 | ||
9bb8582e | 96 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
67727184 | 97 | return 0; |
42429aae PM |
98 | } |
99 | ||
1da177e4 LT |
100 | static void vlan_rcu_free(struct rcu_head *rcu) |
101 | { | |
5c15bdec | 102 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
103 | } |
104 | ||
23289a37 | 105 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 106 | { |
9dfebcc6 | 107 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
af301517 | 108 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 109 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 | 110 | struct vlan_group *grp; |
9bb8582e | 111 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
112 | |
113 | ASSERT_RTNL(); | |
acc5efbc | 114 | |
b616b09a | 115 | grp = rtnl_dereference(real_dev->vlgrp); |
af301517 | 116 | BUG_ON(!grp); |
acc5efbc | 117 | |
acc5efbc | 118 | /* Take it out of our own structures, but be sure to interlock with |
ad1afb00 PG |
119 | * HW accelerating devices or SW vlan input packet processing if |
120 | * VLAN is not 0 (leave it there for 802.1p). | |
acc5efbc | 121 | */ |
ad1afb00 | 122 | if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) |
656299f7 | 123 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 124 | |
af301517 | 125 | grp->nr_vlans--; |
acc5efbc | 126 | |
29906f6a PM |
127 | vlan_group_set_device(grp, vlan_id, NULL); |
128 | if (!grp->killall) | |
63c8099d | 129 | synchronize_net(); |
29906f6a | 130 | |
23289a37 | 131 | unregister_netdevice_queue(dev, head); |
ce305002 | 132 | |
acc5efbc | 133 | /* If the group is now empty, kill off the group. */ |
af301517 | 134 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
135 | vlan_gvrp_uninit_applicant(real_dev); |
136 | ||
65ac6a5f | 137 | rcu_assign_pointer(real_dev->vlgrp, NULL); |
3701e513 | 138 | if (ops->ndo_vlan_rx_register) |
656299f7 | 139 | ops->ndo_vlan_rx_register(real_dev, NULL); |
acc5efbc | 140 | |
acc5efbc PM |
141 | /* Free the group, after all cpu's are done. */ |
142 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
143 | } |
144 | ||
af301517 PM |
145 | /* Get rid of the vlan's reference to real_dev */ |
146 | dev_put(real_dev); | |
1da177e4 LT |
147 | } |
148 | ||
9bb8582e | 149 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 150 | { |
656299f7 SH |
151 | const char *name = real_dev->name; |
152 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 153 | |
1da177e4 | 154 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 155 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 156 | return -EOPNOTSUPP; |
1da177e4 LT |
157 | } |
158 | ||
1da177e4 | 159 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
656299f7 | 160 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
40f98e1a | 161 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 162 | return -EOPNOTSUPP; |
1da177e4 LT |
163 | } |
164 | ||
65ac6a5f | 165 | if (vlan_find_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 166 | return -EEXIST; |
1da177e4 | 167 | |
c1d3ee99 PM |
168 | return 0; |
169 | } | |
170 | ||
07b5b17e | 171 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 172 | { |
9dfebcc6 | 173 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 174 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 175 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 176 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
177 | struct vlan_group *grp, *ngrp = NULL; |
178 | int err; | |
179 | ||
b616b09a | 180 | grp = rtnl_dereference(real_dev->vlgrp); |
e89fe42c | 181 | if (!grp) { |
a9fde260 | 182 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
183 | if (!grp) |
184 | return -ENOBUFS; | |
70c03b49 PM |
185 | err = vlan_gvrp_init_applicant(real_dev); |
186 | if (err < 0) | |
187 | goto out_free_group; | |
e89fe42c PM |
188 | } |
189 | ||
67727184 PE |
190 | err = vlan_group_prealloc_vid(grp, vlan_id); |
191 | if (err < 0) | |
70c03b49 | 192 | goto out_uninit_applicant; |
67727184 | 193 | |
e89fe42c PM |
194 | err = register_netdevice(dev); |
195 | if (err < 0) | |
70c03b49 | 196 | goto out_uninit_applicant; |
e89fe42c PM |
197 | |
198 | /* Account for reference in struct vlan_dev_info */ | |
199 | dev_hold(real_dev); | |
200 | ||
fc4a7489 | 201 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
202 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
203 | ||
204 | /* So, got the sucker initialized, now lets place | |
205 | * it into our local structure. | |
206 | */ | |
207 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
208 | grp->nr_vlans++; |
209 | ||
65ac6a5f | 210 | if (ngrp) { |
3701e513 | 211 | if (ops->ndo_vlan_rx_register) |
65ac6a5f JG |
212 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
213 | rcu_assign_pointer(real_dev->vlgrp, ngrp); | |
214 | } | |
e89fe42c | 215 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 216 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 217 | |
e89fe42c PM |
218 | return 0; |
219 | ||
70c03b49 PM |
220 | out_uninit_applicant: |
221 | if (ngrp) | |
222 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c | 223 | out_free_group: |
6b863d1d | 224 | if (ngrp) { |
6b863d1d ED |
225 | /* Free the group, after all cpu's are done. */ |
226 | call_rcu(&ngrp->rcu, vlan_rcu_free); | |
227 | } | |
e89fe42c PM |
228 | return err; |
229 | } | |
230 | ||
c1d3ee99 | 231 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 232 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 233 | */ |
9bb8582e | 234 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 235 | { |
c1d3ee99 | 236 | struct net_device *new_dev; |
7a17a2f7 PE |
237 | struct net *net = dev_net(real_dev); |
238 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 239 | char name[IFNAMSIZ]; |
2ae0bf69 | 240 | int err; |
c1d3ee99 | 241 | |
9bb8582e | 242 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 243 | return -ERANGE; |
c1d3ee99 | 244 | |
9bb8582e | 245 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
246 | if (err < 0) |
247 | return err; | |
c1d3ee99 | 248 | |
1da177e4 | 249 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 250 | switch (vn->name_type) { |
1da177e4 LT |
251 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
252 | /* name will look like: eth1.0005 */ | |
9bb8582e | 253 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
254 | break; |
255 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
256 | /* Put our vlan.VID in the name. | |
257 | * Name will look like: vlan5 | |
258 | */ | |
9bb8582e | 259 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
260 | break; |
261 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
262 | /* Put our vlan.VID in the name. | |
263 | * Name will look like: eth0.5 | |
264 | */ | |
9bb8582e | 265 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
266 | break; |
267 | case VLAN_NAME_TYPE_PLUS_VID: | |
268 | /* Put our vlan.VID in the name. | |
269 | * Name will look like: vlan0005 | |
270 | */ | |
271 | default: | |
9bb8582e | 272 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 273 | } |
122952fc | 274 | |
2e59af3d ED |
275 | new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name, |
276 | vlan_setup, real_dev->num_tx_queues); | |
5dd8d1e9 | 277 | |
1da177e4 | 278 | if (new_dev == NULL) |
2ae0bf69 | 279 | return -ENOBUFS; |
1da177e4 | 280 | |
5df8dbd7 | 281 | netif_copy_real_num_queues(new_dev, real_dev); |
65d292a2 | 282 | dev_net_set(new_dev, net); |
1da177e4 LT |
283 | /* need 4 bytes for extra VLAN header info, |
284 | * hope the underlying device can handle it. | |
285 | */ | |
286 | new_dev->mtu = real_dev->mtu; | |
287 | ||
9bb8582e | 288 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
289 | vlan_dev_info(new_dev)->real_dev = real_dev; |
290 | vlan_dev_info(new_dev)->dent = NULL; | |
291 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 292 | |
07b5b17e | 293 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
294 | err = register_vlan_dev(new_dev); |
295 | if (err < 0) | |
e89fe42c | 296 | goto out_free_newdev; |
1da177e4 | 297 | |
2ae0bf69 | 298 | return 0; |
1da177e4 | 299 | |
1da177e4 LT |
300 | out_free_newdev: |
301 | free_netdev(new_dev); | |
2ae0bf69 | 302 | return err; |
1da177e4 LT |
303 | } |
304 | ||
8c979c26 PM |
305 | static void vlan_sync_address(struct net_device *dev, |
306 | struct net_device *vlandev) | |
307 | { | |
9dfebcc6 | 308 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
309 | |
310 | /* May be called without an actual change */ | |
311 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
312 | return; | |
313 | ||
314 | /* vlan address was different from the old address and is equal to | |
315 | * the new address */ | |
316 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
317 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 318 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
319 | |
320 | /* vlan address was equal to the old address and is different from | |
321 | * the new address */ | |
322 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
323 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 324 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 PM |
325 | |
326 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
327 | } | |
328 | ||
5fb13570 PM |
329 | static void vlan_transfer_features(struct net_device *dev, |
330 | struct net_device *vlandev) | |
331 | { | |
332 | unsigned long old_features = vlandev->features; | |
333 | ||
289c79a4 PM |
334 | vlandev->features &= ~dev->vlan_features; |
335 | vlandev->features |= dev->features & dev->vlan_features; | |
1ae4be22 | 336 | vlandev->gso_max_size = dev->gso_max_size; |
029f5fc3 JF |
337 | |
338 | if (dev->features & NETIF_F_HW_VLAN_TX) | |
339 | vlandev->hard_header_len = dev->hard_header_len; | |
340 | else | |
341 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
342 | ||
b85daa53 VD |
343 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
344 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
345 | #endif | |
f6b9f4b2 VD |
346 | vlandev->real_num_tx_queues = dev->real_num_tx_queues; |
347 | BUG_ON(vlandev->real_num_tx_queues > vlandev->num_tx_queues); | |
5fb13570 PM |
348 | |
349 | if (old_features != vlandev->features) | |
350 | netdev_features_change(vlandev); | |
351 | } | |
352 | ||
802fb176 PE |
353 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
354 | { | |
355 | switch (event) { | |
356 | case NETDEV_CHANGENAME: | |
357 | vlan_proc_rem_dev(dev); | |
358 | if (vlan_proc_add_dev(dev) < 0) | |
359 | pr_warning("8021q: failed to change proc name for %s\n", | |
360 | dev->name); | |
361 | break; | |
30688a9a PE |
362 | case NETDEV_REGISTER: |
363 | if (vlan_proc_add_dev(dev) < 0) | |
364 | pr_warning("8021q: failed to add proc entry for %s\n", | |
365 | dev->name); | |
366 | break; | |
367 | case NETDEV_UNREGISTER: | |
368 | vlan_proc_rem_dev(dev); | |
369 | break; | |
802fb176 PE |
370 | } |
371 | } | |
372 | ||
2029cc2c PM |
373 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
374 | void *ptr) | |
1da177e4 LT |
375 | { |
376 | struct net_device *dev = ptr; | |
802fb176 | 377 | struct vlan_group *grp; |
1da177e4 LT |
378 | int i, flgs; |
379 | struct net_device *vlandev; | |
5e756593 | 380 | struct vlan_dev_info *vlan; |
29906f6a | 381 | LIST_HEAD(list); |
1da177e4 | 382 | |
81d85346 | 383 | if (is_vlan_dev(dev)) |
802fb176 | 384 | __vlan_device_event(dev, event); |
802fb176 | 385 | |
ad1afb00 PG |
386 | if ((event == NETDEV_UP) && |
387 | (dev->features & NETIF_F_HW_VLAN_FILTER) && | |
388 | dev->netdev_ops->ndo_vlan_rx_add_vid) { | |
389 | pr_info("8021q: adding VLAN 0 to HW filter on device %s\n", | |
390 | dev->name); | |
391 | dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); | |
392 | } | |
393 | ||
b616b09a | 394 | grp = rtnl_dereference(dev->vlgrp); |
1da177e4 LT |
395 | if (!grp) |
396 | goto out; | |
397 | ||
398 | /* It is OK that we do not hold the group lock right now, | |
399 | * as we run under the RTNL lock. | |
400 | */ | |
401 | ||
402 | switch (event) { | |
403 | case NETDEV_CHANGE: | |
404 | /* Propagate real device state to vlan devices */ | |
b738127d | 405 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 406 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
407 | if (!vlandev) |
408 | continue; | |
409 | ||
fc4a7489 | 410 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
411 | } |
412 | break; | |
413 | ||
8c979c26 PM |
414 | case NETDEV_CHANGEADDR: |
415 | /* Adjust unicast filters on underlying device */ | |
b738127d | 416 | for (i = 0; i < VLAN_N_VID; i++) { |
8c979c26 PM |
417 | vlandev = vlan_group_get_device(grp, i); |
418 | if (!vlandev) | |
419 | continue; | |
420 | ||
d932e04a PM |
421 | flgs = vlandev->flags; |
422 | if (!(flgs & IFF_UP)) | |
423 | continue; | |
424 | ||
8c979c26 PM |
425 | vlan_sync_address(dev, vlandev); |
426 | } | |
2e477c9b HX |
427 | break; |
428 | ||
429 | case NETDEV_CHANGEMTU: | |
b738127d | 430 | for (i = 0; i < VLAN_N_VID; i++) { |
2e477c9b HX |
431 | vlandev = vlan_group_get_device(grp, i); |
432 | if (!vlandev) | |
433 | continue; | |
434 | ||
435 | if (vlandev->mtu <= dev->mtu) | |
436 | continue; | |
437 | ||
438 | dev_set_mtu(vlandev, dev->mtu); | |
439 | } | |
8c979c26 PM |
440 | break; |
441 | ||
5fb13570 PM |
442 | case NETDEV_FEAT_CHANGE: |
443 | /* Propagate device features to underlying device */ | |
b738127d | 444 | for (i = 0; i < VLAN_N_VID; i++) { |
5fb13570 PM |
445 | vlandev = vlan_group_get_device(grp, i); |
446 | if (!vlandev) | |
447 | continue; | |
448 | ||
449 | vlan_transfer_features(dev, vlandev); | |
450 | } | |
451 | ||
452 | break; | |
453 | ||
1da177e4 LT |
454 | case NETDEV_DOWN: |
455 | /* Put all VLANs for this dev in the down state too. */ | |
b738127d | 456 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 457 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
458 | if (!vlandev) |
459 | continue; | |
460 | ||
461 | flgs = vlandev->flags; | |
462 | if (!(flgs & IFF_UP)) | |
463 | continue; | |
464 | ||
5e756593 PM |
465 | vlan = vlan_dev_info(vlandev); |
466 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
467 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 468 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
469 | } |
470 | break; | |
471 | ||
472 | case NETDEV_UP: | |
473 | /* Put all VLANs for this dev in the up state too. */ | |
b738127d | 474 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 475 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
476 | if (!vlandev) |
477 | continue; | |
122952fc | 478 | |
1da177e4 LT |
479 | flgs = vlandev->flags; |
480 | if (flgs & IFF_UP) | |
481 | continue; | |
482 | ||
5e756593 PM |
483 | vlan = vlan_dev_info(vlandev); |
484 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
485 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 486 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
487 | } |
488 | break; | |
122952fc | 489 | |
1da177e4 | 490 | case NETDEV_UNREGISTER: |
3b27e105 DL |
491 | /* twiddle thumbs on netns device moves */ |
492 | if (dev->reg_state != NETREG_UNREGISTERING) | |
493 | break; | |
494 | ||
29906f6a PM |
495 | /* Delete all VLANs for this dev. */ |
496 | grp->killall = 1; | |
497 | ||
b738127d | 498 | for (i = 0; i < VLAN_N_VID; i++) { |
29906f6a PM |
499 | vlandev = vlan_group_get_device(grp, i); |
500 | if (!vlandev) | |
501 | continue; | |
502 | ||
503 | /* unregistration of last vlan destroys group, abort | |
504 | * afterwards */ | |
505 | if (grp->nr_vlans == 1) | |
b738127d | 506 | i = VLAN_N_VID; |
29906f6a PM |
507 | |
508 | unregister_vlan_dev(vlandev, &list); | |
509 | } | |
510 | unregister_netdevice_many(&list); | |
1da177e4 | 511 | break; |
1c01fe14 JP |
512 | |
513 | case NETDEV_PRE_TYPE_CHANGE: | |
514 | /* Forbid underlaying device to change its type. */ | |
515 | return NOTIFY_BAD; | |
3ff50b79 | 516 | } |
1da177e4 LT |
517 | |
518 | out: | |
519 | return NOTIFY_DONE; | |
520 | } | |
521 | ||
69ab4b7d PM |
522 | static struct notifier_block vlan_notifier_block __read_mostly = { |
523 | .notifier_call = vlan_device_event, | |
524 | }; | |
525 | ||
1da177e4 LT |
526 | /* |
527 | * VLAN IOCTL handler. | |
528 | * o execute requested action or pass command to the device driver | |
529 | * arg is really a struct vlan_ioctl_args __user *. | |
530 | */ | |
881d966b | 531 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 532 | { |
c17d8874 | 533 | int err; |
1da177e4 | 534 | struct vlan_ioctl_args args; |
c17d8874 | 535 | struct net_device *dev = NULL; |
1da177e4 LT |
536 | |
537 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
538 | return -EFAULT; | |
539 | ||
540 | /* Null terminate this sucker, just in case. */ | |
541 | args.device1[23] = 0; | |
542 | args.u.device2[23] = 0; | |
543 | ||
c17d8874 PM |
544 | rtnl_lock(); |
545 | ||
1da177e4 LT |
546 | switch (args.cmd) { |
547 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
548 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
549 | case SET_VLAN_FLAG_CMD: | |
550 | case ADD_VLAN_CMD: | |
551 | case DEL_VLAN_CMD: | |
552 | case GET_VLAN_REALDEV_NAME_CMD: | |
553 | case GET_VLAN_VID_CMD: | |
554 | err = -ENODEV; | |
65d292a2 | 555 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
556 | if (!dev) |
557 | goto out; | |
558 | ||
559 | err = -EINVAL; | |
26a25239 | 560 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
561 | goto out; |
562 | } | |
563 | ||
564 | switch (args.cmd) { | |
565 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
566 | err = -EPERM; | |
1da177e4 | 567 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
568 | break; |
569 | vlan_dev_set_ingress_priority(dev, | |
570 | args.u.skb_priority, | |
571 | args.vlan_qos); | |
fffe470a | 572 | err = 0; |
1da177e4 LT |
573 | break; |
574 | ||
575 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 576 | err = -EPERM; |
1da177e4 | 577 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
578 | break; |
579 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
580 | args.u.skb_priority, |
581 | args.vlan_qos); | |
582 | break; | |
583 | ||
584 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 585 | err = -EPERM; |
1da177e4 | 586 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 587 | break; |
b3ce0325 PM |
588 | err = vlan_dev_change_flags(dev, |
589 | args.vlan_qos ? args.u.flag : 0, | |
590 | args.u.flag); | |
1da177e4 LT |
591 | break; |
592 | ||
593 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 594 | err = -EPERM; |
1da177e4 | 595 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 596 | break; |
c17d8874 PM |
597 | if ((args.u.name_type >= 0) && |
598 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
599 | struct vlan_net *vn; |
600 | ||
601 | vn = net_generic(net, vlan_net_id); | |
602 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
603 | err = 0; |
604 | } else { | |
605 | err = -EINVAL; | |
606 | } | |
607 | break; | |
608 | ||
609 | case ADD_VLAN_CMD: | |
c17d8874 | 610 | err = -EPERM; |
1da177e4 | 611 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 612 | break; |
2ae0bf69 | 613 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
614 | break; |
615 | ||
616 | case DEL_VLAN_CMD: | |
c17d8874 | 617 | err = -EPERM; |
1da177e4 | 618 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 619 | break; |
23289a37 | 620 | unregister_vlan_dev(dev, NULL); |
af301517 | 621 | err = 0; |
1da177e4 LT |
622 | break; |
623 | ||
1da177e4 | 624 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 625 | err = 0; |
c17d8874 | 626 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 627 | if (copy_to_user(arg, &args, |
2029cc2c | 628 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 629 | err = -EFAULT; |
1da177e4 LT |
630 | break; |
631 | ||
632 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 633 | err = 0; |
22d1ba74 | 634 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 635 | if (copy_to_user(arg, &args, |
2029cc2c | 636 | sizeof(struct vlan_ioctl_args))) |
122952fc | 637 | err = -EFAULT; |
1da177e4 LT |
638 | break; |
639 | ||
640 | default: | |
198a291c | 641 | err = -EOPNOTSUPP; |
c17d8874 | 642 | break; |
3ff50b79 | 643 | } |
7eb1b3d3 | 644 | out: |
c17d8874 | 645 | rtnl_unlock(); |
1da177e4 LT |
646 | return err; |
647 | } | |
648 | ||
2c8c1e72 | 649 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 650 | { |
946d1a92 | 651 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 652 | int err; |
d9ed0f0e | 653 | |
7a17a2f7 PE |
654 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
655 | ||
cd1c7014 | 656 | err = vlan_proc_init(net); |
cd1c7014 | 657 | |
d9ed0f0e PE |
658 | return err; |
659 | } | |
660 | ||
2c8c1e72 | 661 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 662 | { |
cd1c7014 | 663 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
664 | } |
665 | ||
666 | static struct pernet_operations vlan_net_ops = { | |
667 | .init = vlan_init_net, | |
668 | .exit = vlan_exit_net, | |
946d1a92 EB |
669 | .id = &vlan_net_id, |
670 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
671 | }; |
672 | ||
69ab4b7d PM |
673 | static int __init vlan_proto_init(void) |
674 | { | |
675 | int err; | |
676 | ||
677 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
678 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
679 | ||
91e2ff35 | 680 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
681 | if (err < 0) |
682 | goto err0; | |
683 | ||
69ab4b7d PM |
684 | err = register_netdevice_notifier(&vlan_notifier_block); |
685 | if (err < 0) | |
686 | goto err2; | |
687 | ||
70c03b49 | 688 | err = vlan_gvrp_init(); |
69ab4b7d PM |
689 | if (err < 0) |
690 | goto err3; | |
691 | ||
70c03b49 PM |
692 | err = vlan_netlink_init(); |
693 | if (err < 0) | |
694 | goto err4; | |
695 | ||
69ab4b7d PM |
696 | dev_add_pack(&vlan_packet_type); |
697 | vlan_ioctl_set(vlan_ioctl_handler); | |
698 | return 0; | |
699 | ||
70c03b49 PM |
700 | err4: |
701 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
702 | err3: |
703 | unregister_netdevice_notifier(&vlan_notifier_block); | |
704 | err2: | |
91e2ff35 | 705 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 706 | err0: |
69ab4b7d PM |
707 | return err; |
708 | } | |
709 | ||
710 | static void __exit vlan_cleanup_module(void) | |
711 | { | |
69ab4b7d PM |
712 | vlan_ioctl_set(NULL); |
713 | vlan_netlink_fini(); | |
714 | ||
715 | unregister_netdevice_notifier(&vlan_notifier_block); | |
716 | ||
717 | dev_remove_pack(&vlan_packet_type); | |
718 | ||
91e2ff35 | 719 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 720 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
721 | |
722 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
723 | } |
724 | ||
725 | module_init(vlan_proto_init); | |
726 | module_exit(vlan_cleanup_module); | |
727 | ||
1da177e4 LT |
728 | MODULE_LICENSE("GPL"); |
729 | MODULE_VERSION(DRV_VERSION); |