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