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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 | |
4af429d2 | 275 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, vlan_setup); |
5dd8d1e9 | 276 | |
1da177e4 | 277 | if (new_dev == NULL) |
2ae0bf69 | 278 | return -ENOBUFS; |
1da177e4 | 279 | |
65d292a2 | 280 | dev_net_set(new_dev, net); |
1da177e4 LT |
281 | /* need 4 bytes for extra VLAN header info, |
282 | * hope the underlying device can handle it. | |
283 | */ | |
284 | new_dev->mtu = real_dev->mtu; | |
285 | ||
9bb8582e | 286 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
287 | vlan_dev_info(new_dev)->real_dev = real_dev; |
288 | vlan_dev_info(new_dev)->dent = NULL; | |
289 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 290 | |
07b5b17e | 291 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
292 | err = register_vlan_dev(new_dev); |
293 | if (err < 0) | |
e89fe42c | 294 | goto out_free_newdev; |
1da177e4 | 295 | |
2ae0bf69 | 296 | return 0; |
1da177e4 | 297 | |
1da177e4 LT |
298 | out_free_newdev: |
299 | free_netdev(new_dev); | |
2ae0bf69 | 300 | return err; |
1da177e4 LT |
301 | } |
302 | ||
8c979c26 PM |
303 | static void vlan_sync_address(struct net_device *dev, |
304 | struct net_device *vlandev) | |
305 | { | |
9dfebcc6 | 306 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
307 | |
308 | /* May be called without an actual change */ | |
309 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
310 | return; | |
311 | ||
312 | /* vlan address was different from the old address and is equal to | |
313 | * the new address */ | |
314 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
315 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 316 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
317 | |
318 | /* vlan address was equal to the old address and is different from | |
319 | * the new address */ | |
320 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
321 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 322 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 PM |
323 | |
324 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
325 | } | |
326 | ||
5fb13570 PM |
327 | static void vlan_transfer_features(struct net_device *dev, |
328 | struct net_device *vlandev) | |
329 | { | |
04ed3e74 | 330 | u32 old_features = vlandev->features; |
5fb13570 | 331 | |
289c79a4 PM |
332 | vlandev->features &= ~dev->vlan_features; |
333 | vlandev->features |= dev->features & dev->vlan_features; | |
1ae4be22 | 334 | vlandev->gso_max_size = dev->gso_max_size; |
029f5fc3 JF |
335 | |
336 | if (dev->features & NETIF_F_HW_VLAN_TX) | |
337 | vlandev->hard_header_len = dev->hard_header_len; | |
338 | else | |
339 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
340 | ||
b85daa53 VD |
341 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
342 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
343 | #endif | |
5fb13570 PM |
344 | if (old_features != vlandev->features) |
345 | netdev_features_change(vlandev); | |
346 | } | |
347 | ||
802fb176 PE |
348 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
349 | { | |
350 | switch (event) { | |
351 | case NETDEV_CHANGENAME: | |
352 | vlan_proc_rem_dev(dev); | |
353 | if (vlan_proc_add_dev(dev) < 0) | |
354 | pr_warning("8021q: failed to change proc name for %s\n", | |
355 | dev->name); | |
356 | break; | |
30688a9a PE |
357 | case NETDEV_REGISTER: |
358 | if (vlan_proc_add_dev(dev) < 0) | |
359 | pr_warning("8021q: failed to add proc entry for %s\n", | |
360 | dev->name); | |
361 | break; | |
362 | case NETDEV_UNREGISTER: | |
363 | vlan_proc_rem_dev(dev); | |
364 | break; | |
802fb176 PE |
365 | } |
366 | } | |
367 | ||
2029cc2c PM |
368 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
369 | void *ptr) | |
1da177e4 LT |
370 | { |
371 | struct net_device *dev = ptr; | |
802fb176 | 372 | struct vlan_group *grp; |
1da177e4 LT |
373 | int i, flgs; |
374 | struct net_device *vlandev; | |
5e756593 | 375 | struct vlan_dev_info *vlan; |
29906f6a | 376 | LIST_HEAD(list); |
1da177e4 | 377 | |
81d85346 | 378 | if (is_vlan_dev(dev)) |
802fb176 | 379 | __vlan_device_event(dev, event); |
802fb176 | 380 | |
ad1afb00 PG |
381 | if ((event == NETDEV_UP) && |
382 | (dev->features & NETIF_F_HW_VLAN_FILTER) && | |
383 | dev->netdev_ops->ndo_vlan_rx_add_vid) { | |
384 | pr_info("8021q: adding VLAN 0 to HW filter on device %s\n", | |
385 | dev->name); | |
386 | dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); | |
387 | } | |
388 | ||
b616b09a | 389 | grp = rtnl_dereference(dev->vlgrp); |
1da177e4 LT |
390 | if (!grp) |
391 | goto out; | |
392 | ||
393 | /* It is OK that we do not hold the group lock right now, | |
394 | * as we run under the RTNL lock. | |
395 | */ | |
396 | ||
397 | switch (event) { | |
398 | case NETDEV_CHANGE: | |
399 | /* Propagate real device state to vlan devices */ | |
b738127d | 400 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 401 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
402 | if (!vlandev) |
403 | continue; | |
404 | ||
fc4a7489 | 405 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
406 | } |
407 | break; | |
408 | ||
8c979c26 PM |
409 | case NETDEV_CHANGEADDR: |
410 | /* Adjust unicast filters on underlying device */ | |
b738127d | 411 | for (i = 0; i < VLAN_N_VID; i++) { |
8c979c26 PM |
412 | vlandev = vlan_group_get_device(grp, i); |
413 | if (!vlandev) | |
414 | continue; | |
415 | ||
d932e04a PM |
416 | flgs = vlandev->flags; |
417 | if (!(flgs & IFF_UP)) | |
418 | continue; | |
419 | ||
8c979c26 PM |
420 | vlan_sync_address(dev, vlandev); |
421 | } | |
2e477c9b HX |
422 | break; |
423 | ||
424 | case NETDEV_CHANGEMTU: | |
b738127d | 425 | for (i = 0; i < VLAN_N_VID; i++) { |
2e477c9b HX |
426 | vlandev = vlan_group_get_device(grp, i); |
427 | if (!vlandev) | |
428 | continue; | |
429 | ||
430 | if (vlandev->mtu <= dev->mtu) | |
431 | continue; | |
432 | ||
433 | dev_set_mtu(vlandev, dev->mtu); | |
434 | } | |
8c979c26 PM |
435 | break; |
436 | ||
5fb13570 PM |
437 | case NETDEV_FEAT_CHANGE: |
438 | /* Propagate device features to underlying device */ | |
b738127d | 439 | for (i = 0; i < VLAN_N_VID; i++) { |
5fb13570 PM |
440 | vlandev = vlan_group_get_device(grp, i); |
441 | if (!vlandev) | |
442 | continue; | |
443 | ||
444 | vlan_transfer_features(dev, vlandev); | |
445 | } | |
446 | ||
447 | break; | |
448 | ||
1da177e4 LT |
449 | case NETDEV_DOWN: |
450 | /* Put all VLANs for this dev in the down state too. */ | |
b738127d | 451 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 452 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
453 | if (!vlandev) |
454 | continue; | |
455 | ||
456 | flgs = vlandev->flags; | |
457 | if (!(flgs & IFF_UP)) | |
458 | continue; | |
459 | ||
5e756593 PM |
460 | vlan = vlan_dev_info(vlandev); |
461 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
462 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 463 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
464 | } |
465 | break; | |
466 | ||
467 | case NETDEV_UP: | |
468 | /* Put all VLANs for this dev in the up state too. */ | |
b738127d | 469 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 470 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
471 | if (!vlandev) |
472 | continue; | |
122952fc | 473 | |
1da177e4 LT |
474 | flgs = vlandev->flags; |
475 | if (flgs & IFF_UP) | |
476 | continue; | |
477 | ||
5e756593 PM |
478 | vlan = vlan_dev_info(vlandev); |
479 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
480 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 481 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
482 | } |
483 | break; | |
122952fc | 484 | |
1da177e4 | 485 | case NETDEV_UNREGISTER: |
3b27e105 DL |
486 | /* twiddle thumbs on netns device moves */ |
487 | if (dev->reg_state != NETREG_UNREGISTERING) | |
488 | break; | |
489 | ||
29906f6a PM |
490 | /* Delete all VLANs for this dev. */ |
491 | grp->killall = 1; | |
492 | ||
b738127d | 493 | for (i = 0; i < VLAN_N_VID; i++) { |
29906f6a PM |
494 | vlandev = vlan_group_get_device(grp, i); |
495 | if (!vlandev) | |
496 | continue; | |
497 | ||
498 | /* unregistration of last vlan destroys group, abort | |
499 | * afterwards */ | |
500 | if (grp->nr_vlans == 1) | |
b738127d | 501 | i = VLAN_N_VID; |
29906f6a PM |
502 | |
503 | unregister_vlan_dev(vlandev, &list); | |
504 | } | |
505 | unregister_netdevice_many(&list); | |
1da177e4 | 506 | break; |
1c01fe14 JP |
507 | |
508 | case NETDEV_PRE_TYPE_CHANGE: | |
509 | /* Forbid underlaying device to change its type. */ | |
510 | return NOTIFY_BAD; | |
3ff50b79 | 511 | } |
1da177e4 LT |
512 | |
513 | out: | |
514 | return NOTIFY_DONE; | |
515 | } | |
516 | ||
69ab4b7d PM |
517 | static struct notifier_block vlan_notifier_block __read_mostly = { |
518 | .notifier_call = vlan_device_event, | |
519 | }; | |
520 | ||
1da177e4 LT |
521 | /* |
522 | * VLAN IOCTL handler. | |
523 | * o execute requested action or pass command to the device driver | |
524 | * arg is really a struct vlan_ioctl_args __user *. | |
525 | */ | |
881d966b | 526 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 527 | { |
c17d8874 | 528 | int err; |
1da177e4 | 529 | struct vlan_ioctl_args args; |
c17d8874 | 530 | struct net_device *dev = NULL; |
1da177e4 LT |
531 | |
532 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
533 | return -EFAULT; | |
534 | ||
535 | /* Null terminate this sucker, just in case. */ | |
536 | args.device1[23] = 0; | |
537 | args.u.device2[23] = 0; | |
538 | ||
c17d8874 PM |
539 | rtnl_lock(); |
540 | ||
1da177e4 LT |
541 | switch (args.cmd) { |
542 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
543 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
544 | case SET_VLAN_FLAG_CMD: | |
545 | case ADD_VLAN_CMD: | |
546 | case DEL_VLAN_CMD: | |
547 | case GET_VLAN_REALDEV_NAME_CMD: | |
548 | case GET_VLAN_VID_CMD: | |
549 | err = -ENODEV; | |
65d292a2 | 550 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
551 | if (!dev) |
552 | goto out; | |
553 | ||
554 | err = -EINVAL; | |
26a25239 | 555 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
556 | goto out; |
557 | } | |
558 | ||
559 | switch (args.cmd) { | |
560 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
561 | err = -EPERM; | |
1da177e4 | 562 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
563 | break; |
564 | vlan_dev_set_ingress_priority(dev, | |
565 | args.u.skb_priority, | |
566 | args.vlan_qos); | |
fffe470a | 567 | err = 0; |
1da177e4 LT |
568 | break; |
569 | ||
570 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 571 | err = -EPERM; |
1da177e4 | 572 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
573 | break; |
574 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
575 | args.u.skb_priority, |
576 | args.vlan_qos); | |
577 | break; | |
578 | ||
579 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 580 | err = -EPERM; |
1da177e4 | 581 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 582 | break; |
b3ce0325 PM |
583 | err = vlan_dev_change_flags(dev, |
584 | args.vlan_qos ? args.u.flag : 0, | |
585 | args.u.flag); | |
1da177e4 LT |
586 | break; |
587 | ||
588 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 589 | err = -EPERM; |
1da177e4 | 590 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 591 | break; |
c17d8874 PM |
592 | if ((args.u.name_type >= 0) && |
593 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
594 | struct vlan_net *vn; |
595 | ||
596 | vn = net_generic(net, vlan_net_id); | |
597 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
598 | err = 0; |
599 | } else { | |
600 | err = -EINVAL; | |
601 | } | |
602 | break; | |
603 | ||
604 | case ADD_VLAN_CMD: | |
c17d8874 | 605 | err = -EPERM; |
1da177e4 | 606 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 607 | break; |
2ae0bf69 | 608 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
609 | break; |
610 | ||
611 | case DEL_VLAN_CMD: | |
c17d8874 | 612 | err = -EPERM; |
1da177e4 | 613 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 614 | break; |
23289a37 | 615 | unregister_vlan_dev(dev, NULL); |
af301517 | 616 | err = 0; |
1da177e4 LT |
617 | break; |
618 | ||
1da177e4 | 619 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 620 | err = 0; |
c17d8874 | 621 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 622 | if (copy_to_user(arg, &args, |
2029cc2c | 623 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 624 | err = -EFAULT; |
1da177e4 LT |
625 | break; |
626 | ||
627 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 628 | err = 0; |
22d1ba74 | 629 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 630 | if (copy_to_user(arg, &args, |
2029cc2c | 631 | sizeof(struct vlan_ioctl_args))) |
122952fc | 632 | err = -EFAULT; |
1da177e4 LT |
633 | break; |
634 | ||
635 | default: | |
198a291c | 636 | err = -EOPNOTSUPP; |
c17d8874 | 637 | break; |
3ff50b79 | 638 | } |
7eb1b3d3 | 639 | out: |
c17d8874 | 640 | rtnl_unlock(); |
1da177e4 LT |
641 | return err; |
642 | } | |
643 | ||
2c8c1e72 | 644 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 645 | { |
946d1a92 | 646 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 647 | int err; |
d9ed0f0e | 648 | |
7a17a2f7 PE |
649 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
650 | ||
cd1c7014 | 651 | err = vlan_proc_init(net); |
cd1c7014 | 652 | |
d9ed0f0e PE |
653 | return err; |
654 | } | |
655 | ||
2c8c1e72 | 656 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 657 | { |
cd1c7014 | 658 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
659 | } |
660 | ||
661 | static struct pernet_operations vlan_net_ops = { | |
662 | .init = vlan_init_net, | |
663 | .exit = vlan_exit_net, | |
946d1a92 EB |
664 | .id = &vlan_net_id, |
665 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
666 | }; |
667 | ||
69ab4b7d PM |
668 | static int __init vlan_proto_init(void) |
669 | { | |
670 | int err; | |
671 | ||
672 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
673 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
674 | ||
91e2ff35 | 675 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
676 | if (err < 0) |
677 | goto err0; | |
678 | ||
69ab4b7d PM |
679 | err = register_netdevice_notifier(&vlan_notifier_block); |
680 | if (err < 0) | |
681 | goto err2; | |
682 | ||
70c03b49 | 683 | err = vlan_gvrp_init(); |
69ab4b7d PM |
684 | if (err < 0) |
685 | goto err3; | |
686 | ||
70c03b49 PM |
687 | err = vlan_netlink_init(); |
688 | if (err < 0) | |
689 | goto err4; | |
690 | ||
69ab4b7d PM |
691 | dev_add_pack(&vlan_packet_type); |
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 | ||
712 | dev_remove_pack(&vlan_packet_type); | |
713 | ||
91e2ff35 | 714 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 715 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
716 | |
717 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
718 | } |
719 | ||
720 | module_init(vlan_proto_init); | |
721 | module_exit(vlan_cleanup_module); | |
722 | ||
1da177e4 LT |
723 | MODULE_LICENSE("GPL"); |
724 | MODULE_VERSION(DRV_VERSION); |