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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> | |
1da177e4 | 25 | #include <linux/init.h> |
82524746 | 26 | #include <linux/rculist.h> |
1da177e4 LT |
27 | #include <net/p8022.h> |
28 | #include <net/arp.h> | |
29 | #include <linux/rtnetlink.h> | |
30 | #include <linux/notifier.h> | |
61362766 | 31 | #include <net/rtnetlink.h> |
e9dc8653 | 32 | #include <net/net_namespace.h> |
d9ed0f0e | 33 | #include <net/netns/generic.h> |
61362766 | 34 | #include <asm/uaccess.h> |
1da177e4 LT |
35 | |
36 | #include <linux/if_vlan.h> | |
37 | #include "vlan.h" | |
38 | #include "vlanproc.h" | |
39 | ||
40 | #define DRV_VERSION "1.8" | |
41 | ||
42 | /* Global VLAN variables */ | |
43 | ||
d9ed0f0e PE |
44 | int vlan_net_id; |
45 | ||
1da177e4 LT |
46 | /* Our listing of VLAN group(s) */ |
47 | static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; | |
1da177e4 | 48 | |
b3020061 SH |
49 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
50 | const char vlan_version[] = DRV_VERSION; | |
51 | static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
52 | static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
1da177e4 | 53 | |
7546dd97 | 54 | static struct packet_type vlan_packet_type __read_mostly = { |
09640e63 | 55 | .type = cpu_to_be16(ETH_P_8021Q), |
1da177e4 LT |
56 | .func = vlan_skb_recv, /* VLAN receive method */ |
57 | }; | |
58 | ||
1da177e4 LT |
59 | /* End of global variables definitions. */ |
60 | ||
2029cc2c PM |
61 | static inline unsigned int vlan_grp_hashfn(unsigned int idx) |
62 | { | |
63 | return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK; | |
64 | } | |
65 | ||
1da177e4 | 66 | /* Must be invoked with RCU read lock (no preempt) */ |
a9fde260 | 67 | static struct vlan_group *__vlan_find_group(struct net_device *real_dev) |
1da177e4 LT |
68 | { |
69 | struct vlan_group *grp; | |
70 | struct hlist_node *n; | |
a9fde260 | 71 | int hash = vlan_grp_hashfn(real_dev->ifindex); |
1da177e4 LT |
72 | |
73 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { | |
a9fde260 | 74 | if (grp->real_dev == real_dev) |
1da177e4 LT |
75 | return grp; |
76 | } | |
77 | ||
78 | return NULL; | |
79 | } | |
80 | ||
81 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. | |
82 | * | |
83 | * Must be invoked with RCU read lock (no preempt) | |
84 | */ | |
9bb8582e | 85 | struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 86 | { |
a9fde260 | 87 | struct vlan_group *grp = __vlan_find_group(real_dev); |
1da177e4 LT |
88 | |
89 | if (grp) | |
9bb8582e | 90 | return vlan_group_get_device(grp, vlan_id); |
1da177e4 LT |
91 | |
92 | return NULL; | |
93 | } | |
94 | ||
5c15bdec DA |
95 | static void vlan_group_free(struct vlan_group *grp) |
96 | { | |
97 | int i; | |
98 | ||
2029cc2c | 99 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
5c15bdec DA |
100 | kfree(grp->vlan_devices_arrays[i]); |
101 | kfree(grp); | |
102 | } | |
103 | ||
a9fde260 | 104 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
42429aae PM |
105 | { |
106 | struct vlan_group *grp; | |
42429aae PM |
107 | |
108 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
109 | if (!grp) | |
110 | return NULL; | |
111 | ||
a9fde260 | 112 | grp->real_dev = real_dev; |
42429aae | 113 | hlist_add_head_rcu(&grp->hlist, |
a9fde260 | 114 | &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); |
42429aae | 115 | return grp; |
67727184 | 116 | } |
42429aae | 117 | |
9bb8582e | 118 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
67727184 PE |
119 | { |
120 | struct net_device **array; | |
121 | unsigned int size; | |
122 | ||
123 | ASSERT_RTNL(); | |
124 | ||
9bb8582e | 125 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
67727184 PE |
126 | if (array != NULL) |
127 | return 0; | |
128 | ||
129 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
130 | array = kzalloc(size, GFP_KERNEL); | |
131 | if (array == NULL) | |
132 | return -ENOBUFS; | |
133 | ||
9bb8582e | 134 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
67727184 | 135 | return 0; |
42429aae PM |
136 | } |
137 | ||
1da177e4 LT |
138 | static void vlan_rcu_free(struct rcu_head *rcu) |
139 | { | |
5c15bdec | 140 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
141 | } |
142 | ||
23289a37 | 143 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 144 | { |
9dfebcc6 | 145 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
af301517 | 146 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 147 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 | 148 | struct vlan_group *grp; |
9bb8582e | 149 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
150 | |
151 | ASSERT_RTNL(); | |
acc5efbc | 152 | |
a9fde260 | 153 | grp = __vlan_find_group(real_dev); |
af301517 | 154 | BUG_ON(!grp); |
acc5efbc | 155 | |
acc5efbc PM |
156 | /* Take it out of our own structures, but be sure to interlock with |
157 | * HW accelerating devices or SW vlan input packet processing. | |
158 | */ | |
159 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
656299f7 | 160 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 161 | |
af301517 | 162 | grp->nr_vlans--; |
acc5efbc | 163 | |
63c8099d ED |
164 | if (!grp->killall) { |
165 | vlan_group_set_device(grp, vlan_id, NULL); | |
166 | synchronize_net(); | |
167 | } | |
23289a37 | 168 | unregister_netdevice_queue(dev, head); |
ce305002 | 169 | |
acc5efbc | 170 | /* If the group is now empty, kill off the group. */ |
af301517 | 171 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
172 | vlan_gvrp_uninit_applicant(real_dev); |
173 | ||
acc5efbc | 174 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 175 | ops->ndo_vlan_rx_register(real_dev, NULL); |
acc5efbc PM |
176 | |
177 | hlist_del_rcu(&grp->hlist); | |
1da177e4 | 178 | |
acc5efbc PM |
179 | /* Free the group, after all cpu's are done. */ |
180 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
181 | } |
182 | ||
af301517 PM |
183 | /* Get rid of the vlan's reference to real_dev */ |
184 | dev_put(real_dev); | |
1da177e4 LT |
185 | } |
186 | ||
63c8099d ED |
187 | void unregister_vlan_dev_alls(struct vlan_group *grp) |
188 | { | |
189 | LIST_HEAD(list); | |
190 | int i; | |
191 | struct net_device *vlandev; | |
192 | struct vlan_group save; | |
193 | ||
194 | memcpy(&save, grp, sizeof(save)); | |
195 | memset(&grp->vlan_devices_arrays, 0, sizeof(grp->vlan_devices_arrays)); | |
196 | grp->killall = 1; | |
197 | ||
198 | synchronize_net(); | |
199 | ||
200 | /* Delete all VLANs for this dev. */ | |
201 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
202 | vlandev = vlan_group_get_device(&save, i); | |
203 | if (!vlandev) | |
204 | continue; | |
205 | ||
206 | unregister_vlan_dev(vlandev, &list); | |
207 | if (grp->nr_vlans == 0) | |
208 | break; | |
209 | } | |
210 | unregister_netdevice_many(&list); | |
211 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) | |
212 | kfree(save.vlan_devices_arrays[i]); | |
213 | } | |
214 | ||
2029cc2c PM |
215 | static void vlan_transfer_operstate(const struct net_device *dev, |
216 | struct net_device *vlandev) | |
ddd7bf9f SR |
217 | { |
218 | /* Have to respect userspace enforced dormant state | |
219 | * of real device, also must allow supplicant running | |
220 | * on VLAN device | |
221 | */ | |
222 | if (dev->operstate == IF_OPER_DORMANT) | |
223 | netif_dormant_on(vlandev); | |
224 | else | |
225 | netif_dormant_off(vlandev); | |
226 | ||
227 | if (netif_carrier_ok(dev)) { | |
228 | if (!netif_carrier_ok(vlandev)) | |
229 | netif_carrier_on(vlandev); | |
230 | } else { | |
231 | if (netif_carrier_ok(vlandev)) | |
232 | netif_carrier_off(vlandev); | |
233 | } | |
234 | } | |
235 | ||
9bb8582e | 236 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 237 | { |
656299f7 SH |
238 | const char *name = real_dev->name; |
239 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 240 | |
1da177e4 | 241 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 242 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 243 | return -EOPNOTSUPP; |
1da177e4 LT |
244 | } |
245 | ||
656299f7 | 246 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) { |
40f98e1a | 247 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 248 | return -EOPNOTSUPP; |
1da177e4 LT |
249 | } |
250 | ||
251 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
656299f7 | 252 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
40f98e1a | 253 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 254 | return -EOPNOTSUPP; |
1da177e4 LT |
255 | } |
256 | ||
40f98e1a | 257 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 258 | return -EEXIST; |
1da177e4 | 259 | |
c1d3ee99 PM |
260 | return 0; |
261 | } | |
262 | ||
07b5b17e | 263 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 264 | { |
9dfebcc6 | 265 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 266 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 267 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 268 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
269 | struct vlan_group *grp, *ngrp = NULL; |
270 | int err; | |
271 | ||
a9fde260 | 272 | grp = __vlan_find_group(real_dev); |
e89fe42c | 273 | if (!grp) { |
a9fde260 | 274 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
275 | if (!grp) |
276 | return -ENOBUFS; | |
70c03b49 PM |
277 | err = vlan_gvrp_init_applicant(real_dev); |
278 | if (err < 0) | |
279 | goto out_free_group; | |
e89fe42c PM |
280 | } |
281 | ||
67727184 PE |
282 | err = vlan_group_prealloc_vid(grp, vlan_id); |
283 | if (err < 0) | |
70c03b49 | 284 | goto out_uninit_applicant; |
67727184 | 285 | |
e89fe42c PM |
286 | err = register_netdevice(dev); |
287 | if (err < 0) | |
70c03b49 | 288 | goto out_uninit_applicant; |
e89fe42c PM |
289 | |
290 | /* Account for reference in struct vlan_dev_info */ | |
291 | dev_hold(real_dev); | |
292 | ||
293 | vlan_transfer_operstate(real_dev, dev); | |
294 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
295 | ||
296 | /* So, got the sucker initialized, now lets place | |
297 | * it into our local structure. | |
298 | */ | |
299 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
300 | grp->nr_vlans++; |
301 | ||
e89fe42c | 302 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 303 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
e89fe42c | 304 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 305 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 306 | |
e89fe42c PM |
307 | return 0; |
308 | ||
70c03b49 PM |
309 | out_uninit_applicant: |
310 | if (ngrp) | |
311 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c PM |
312 | out_free_group: |
313 | if (ngrp) | |
314 | vlan_group_free(ngrp); | |
315 | return err; | |
316 | } | |
317 | ||
c1d3ee99 | 318 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 319 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 320 | */ |
9bb8582e | 321 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 322 | { |
c1d3ee99 | 323 | struct net_device *new_dev; |
7a17a2f7 PE |
324 | struct net *net = dev_net(real_dev); |
325 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 326 | char name[IFNAMSIZ]; |
2ae0bf69 | 327 | int err; |
c1d3ee99 | 328 | |
9bb8582e | 329 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 330 | return -ERANGE; |
c1d3ee99 | 331 | |
9bb8582e | 332 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
333 | if (err < 0) |
334 | return err; | |
c1d3ee99 | 335 | |
1da177e4 | 336 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 337 | switch (vn->name_type) { |
1da177e4 LT |
338 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
339 | /* name will look like: eth1.0005 */ | |
9bb8582e | 340 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
341 | break; |
342 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
343 | /* Put our vlan.VID in the name. | |
344 | * Name will look like: vlan5 | |
345 | */ | |
9bb8582e | 346 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
347 | break; |
348 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
349 | /* Put our vlan.VID in the name. | |
350 | * Name will look like: eth0.5 | |
351 | */ | |
9bb8582e | 352 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
353 | break; |
354 | case VLAN_NAME_TYPE_PLUS_VID: | |
355 | /* Put our vlan.VID in the name. | |
356 | * Name will look like: vlan0005 | |
357 | */ | |
358 | default: | |
9bb8582e | 359 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 360 | } |
122952fc | 361 | |
2e59af3d ED |
362 | new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name, |
363 | vlan_setup, real_dev->num_tx_queues); | |
5dd8d1e9 | 364 | |
1da177e4 | 365 | if (new_dev == NULL) |
2ae0bf69 | 366 | return -ENOBUFS; |
1da177e4 | 367 | |
2e59af3d | 368 | new_dev->real_num_tx_queues = real_dev->real_num_tx_queues; |
65d292a2 | 369 | dev_net_set(new_dev, net); |
1da177e4 LT |
370 | /* need 4 bytes for extra VLAN header info, |
371 | * hope the underlying device can handle it. | |
372 | */ | |
373 | new_dev->mtu = real_dev->mtu; | |
374 | ||
9bb8582e | 375 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
376 | vlan_dev_info(new_dev)->real_dev = real_dev; |
377 | vlan_dev_info(new_dev)->dent = NULL; | |
378 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 379 | |
07b5b17e | 380 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
381 | err = register_vlan_dev(new_dev); |
382 | if (err < 0) | |
e89fe42c | 383 | goto out_free_newdev; |
1da177e4 | 384 | |
2ae0bf69 | 385 | return 0; |
1da177e4 | 386 | |
1da177e4 LT |
387 | out_free_newdev: |
388 | free_netdev(new_dev); | |
2ae0bf69 | 389 | return err; |
1da177e4 LT |
390 | } |
391 | ||
8c979c26 PM |
392 | static void vlan_sync_address(struct net_device *dev, |
393 | struct net_device *vlandev) | |
394 | { | |
9dfebcc6 | 395 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
396 | |
397 | /* May be called without an actual change */ | |
398 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
399 | return; | |
400 | ||
401 | /* vlan address was different from the old address and is equal to | |
402 | * the new address */ | |
403 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
404 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
ccffad25 | 405 | dev_unicast_delete(dev, vlandev->dev_addr); |
8c979c26 PM |
406 | |
407 | /* vlan address was equal to the old address and is different from | |
408 | * the new address */ | |
409 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
410 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
ccffad25 | 411 | dev_unicast_add(dev, vlandev->dev_addr); |
8c979c26 PM |
412 | |
413 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
414 | } | |
415 | ||
5fb13570 PM |
416 | static void vlan_transfer_features(struct net_device *dev, |
417 | struct net_device *vlandev) | |
418 | { | |
419 | unsigned long old_features = vlandev->features; | |
420 | ||
289c79a4 PM |
421 | vlandev->features &= ~dev->vlan_features; |
422 | vlandev->features |= dev->features & dev->vlan_features; | |
1ae4be22 | 423 | vlandev->gso_max_size = dev->gso_max_size; |
b85daa53 VD |
424 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
425 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
426 | #endif | |
5fb13570 PM |
427 | |
428 | if (old_features != vlandev->features) | |
429 | netdev_features_change(vlandev); | |
430 | } | |
431 | ||
802fb176 PE |
432 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
433 | { | |
434 | switch (event) { | |
435 | case NETDEV_CHANGENAME: | |
436 | vlan_proc_rem_dev(dev); | |
437 | if (vlan_proc_add_dev(dev) < 0) | |
438 | pr_warning("8021q: failed to change proc name for %s\n", | |
439 | dev->name); | |
440 | break; | |
30688a9a PE |
441 | case NETDEV_REGISTER: |
442 | if (vlan_proc_add_dev(dev) < 0) | |
443 | pr_warning("8021q: failed to add proc entry for %s\n", | |
444 | dev->name); | |
445 | break; | |
446 | case NETDEV_UNREGISTER: | |
447 | vlan_proc_rem_dev(dev); | |
448 | break; | |
802fb176 PE |
449 | } |
450 | } | |
451 | ||
2029cc2c PM |
452 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
453 | void *ptr) | |
1da177e4 LT |
454 | { |
455 | struct net_device *dev = ptr; | |
802fb176 | 456 | struct vlan_group *grp; |
1da177e4 LT |
457 | int i, flgs; |
458 | struct net_device *vlandev; | |
459 | ||
81d85346 | 460 | if (is_vlan_dev(dev)) |
802fb176 | 461 | __vlan_device_event(dev, event); |
802fb176 | 462 | |
a9fde260 | 463 | grp = __vlan_find_group(dev); |
1da177e4 LT |
464 | if (!grp) |
465 | goto out; | |
466 | ||
467 | /* It is OK that we do not hold the group lock right now, | |
468 | * as we run under the RTNL lock. | |
469 | */ | |
470 | ||
471 | switch (event) { | |
472 | case NETDEV_CHANGE: | |
473 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 474 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 475 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
476 | if (!vlandev) |
477 | continue; | |
478 | ||
ddd7bf9f | 479 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
480 | } |
481 | break; | |
482 | ||
8c979c26 PM |
483 | case NETDEV_CHANGEADDR: |
484 | /* Adjust unicast filters on underlying device */ | |
485 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
486 | vlandev = vlan_group_get_device(grp, i); | |
487 | if (!vlandev) | |
488 | continue; | |
489 | ||
d932e04a PM |
490 | flgs = vlandev->flags; |
491 | if (!(flgs & IFF_UP)) | |
492 | continue; | |
493 | ||
8c979c26 PM |
494 | vlan_sync_address(dev, vlandev); |
495 | } | |
2e477c9b HX |
496 | break; |
497 | ||
498 | case NETDEV_CHANGEMTU: | |
499 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
500 | vlandev = vlan_group_get_device(grp, i); | |
501 | if (!vlandev) | |
502 | continue; | |
503 | ||
504 | if (vlandev->mtu <= dev->mtu) | |
505 | continue; | |
506 | ||
507 | dev_set_mtu(vlandev, dev->mtu); | |
508 | } | |
8c979c26 PM |
509 | break; |
510 | ||
5fb13570 PM |
511 | case NETDEV_FEAT_CHANGE: |
512 | /* Propagate device features to underlying device */ | |
513 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
514 | vlandev = vlan_group_get_device(grp, i); | |
515 | if (!vlandev) | |
516 | continue; | |
517 | ||
518 | vlan_transfer_features(dev, vlandev); | |
519 | } | |
520 | ||
521 | break; | |
522 | ||
1da177e4 LT |
523 | case NETDEV_DOWN: |
524 | /* Put all VLANs for this dev in the down state too. */ | |
525 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 526 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
527 | if (!vlandev) |
528 | continue; | |
529 | ||
530 | flgs = vlandev->flags; | |
531 | if (!(flgs & IFF_UP)) | |
532 | continue; | |
533 | ||
534 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
adc667e8 | 535 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
536 | } |
537 | break; | |
538 | ||
539 | case NETDEV_UP: | |
540 | /* Put all VLANs for this dev in the up state too. */ | |
541 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 542 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
543 | if (!vlandev) |
544 | continue; | |
122952fc | 545 | |
1da177e4 LT |
546 | flgs = vlandev->flags; |
547 | if (flgs & IFF_UP) | |
548 | continue; | |
549 | ||
550 | dev_change_flags(vlandev, flgs | IFF_UP); | |
adc667e8 | 551 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
552 | } |
553 | break; | |
122952fc | 554 | |
1da177e4 | 555 | case NETDEV_UNREGISTER: |
63c8099d | 556 | unregister_vlan_dev_alls(grp); |
1da177e4 | 557 | break; |
3ff50b79 | 558 | } |
1da177e4 LT |
559 | |
560 | out: | |
561 | return NOTIFY_DONE; | |
562 | } | |
563 | ||
69ab4b7d PM |
564 | static struct notifier_block vlan_notifier_block __read_mostly = { |
565 | .notifier_call = vlan_device_event, | |
566 | }; | |
567 | ||
1da177e4 LT |
568 | /* |
569 | * VLAN IOCTL handler. | |
570 | * o execute requested action or pass command to the device driver | |
571 | * arg is really a struct vlan_ioctl_args __user *. | |
572 | */ | |
881d966b | 573 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 574 | { |
c17d8874 | 575 | int err; |
1da177e4 | 576 | struct vlan_ioctl_args args; |
c17d8874 | 577 | struct net_device *dev = NULL; |
1da177e4 LT |
578 | |
579 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
580 | return -EFAULT; | |
581 | ||
582 | /* Null terminate this sucker, just in case. */ | |
583 | args.device1[23] = 0; | |
584 | args.u.device2[23] = 0; | |
585 | ||
c17d8874 PM |
586 | rtnl_lock(); |
587 | ||
1da177e4 LT |
588 | switch (args.cmd) { |
589 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
590 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
591 | case SET_VLAN_FLAG_CMD: | |
592 | case ADD_VLAN_CMD: | |
593 | case DEL_VLAN_CMD: | |
594 | case GET_VLAN_REALDEV_NAME_CMD: | |
595 | case GET_VLAN_VID_CMD: | |
596 | err = -ENODEV; | |
65d292a2 | 597 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
598 | if (!dev) |
599 | goto out; | |
600 | ||
601 | err = -EINVAL; | |
26a25239 | 602 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
603 | goto out; |
604 | } | |
605 | ||
606 | switch (args.cmd) { | |
607 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
608 | err = -EPERM; | |
1da177e4 | 609 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
610 | break; |
611 | vlan_dev_set_ingress_priority(dev, | |
612 | args.u.skb_priority, | |
613 | args.vlan_qos); | |
fffe470a | 614 | err = 0; |
1da177e4 LT |
615 | break; |
616 | ||
617 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 618 | err = -EPERM; |
1da177e4 | 619 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
620 | break; |
621 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
622 | args.u.skb_priority, |
623 | args.vlan_qos); | |
624 | break; | |
625 | ||
626 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 627 | err = -EPERM; |
1da177e4 | 628 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 629 | break; |
b3ce0325 PM |
630 | err = vlan_dev_change_flags(dev, |
631 | args.vlan_qos ? args.u.flag : 0, | |
632 | args.u.flag); | |
1da177e4 LT |
633 | break; |
634 | ||
635 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 636 | err = -EPERM; |
1da177e4 | 637 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 638 | break; |
c17d8874 PM |
639 | if ((args.u.name_type >= 0) && |
640 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
641 | struct vlan_net *vn; |
642 | ||
643 | vn = net_generic(net, vlan_net_id); | |
644 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
645 | err = 0; |
646 | } else { | |
647 | err = -EINVAL; | |
648 | } | |
649 | break; | |
650 | ||
651 | case ADD_VLAN_CMD: | |
c17d8874 | 652 | err = -EPERM; |
1da177e4 | 653 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 654 | break; |
2ae0bf69 | 655 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
656 | break; |
657 | ||
658 | case DEL_VLAN_CMD: | |
c17d8874 | 659 | err = -EPERM; |
1da177e4 | 660 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 661 | break; |
23289a37 | 662 | unregister_vlan_dev(dev, NULL); |
af301517 | 663 | err = 0; |
1da177e4 LT |
664 | break; |
665 | ||
1da177e4 | 666 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 667 | err = 0; |
c17d8874 | 668 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 669 | if (copy_to_user(arg, &args, |
2029cc2c | 670 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 671 | err = -EFAULT; |
1da177e4 LT |
672 | break; |
673 | ||
674 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 675 | err = 0; |
22d1ba74 | 676 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 677 | if (copy_to_user(arg, &args, |
2029cc2c | 678 | sizeof(struct vlan_ioctl_args))) |
122952fc | 679 | err = -EFAULT; |
1da177e4 LT |
680 | break; |
681 | ||
682 | default: | |
198a291c | 683 | err = -EOPNOTSUPP; |
c17d8874 | 684 | break; |
3ff50b79 | 685 | } |
7eb1b3d3 | 686 | out: |
c17d8874 | 687 | rtnl_unlock(); |
1da177e4 LT |
688 | return err; |
689 | } | |
690 | ||
d9ed0f0e PE |
691 | static int vlan_init_net(struct net *net) |
692 | { | |
693 | int err; | |
694 | struct vlan_net *vn; | |
695 | ||
696 | err = -ENOMEM; | |
697 | vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL); | |
698 | if (vn == NULL) | |
699 | goto err_alloc; | |
700 | ||
701 | err = net_assign_generic(net, vlan_net_id, vn); | |
702 | if (err < 0) | |
703 | goto err_assign; | |
704 | ||
7a17a2f7 PE |
705 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
706 | ||
cd1c7014 PE |
707 | err = vlan_proc_init(net); |
708 | if (err < 0) | |
709 | goto err_proc; | |
710 | ||
d9ed0f0e PE |
711 | return 0; |
712 | ||
cd1c7014 PE |
713 | err_proc: |
714 | /* nothing */ | |
d9ed0f0e PE |
715 | err_assign: |
716 | kfree(vn); | |
717 | err_alloc: | |
718 | return err; | |
719 | } | |
720 | ||
721 | static void vlan_exit_net(struct net *net) | |
722 | { | |
723 | struct vlan_net *vn; | |
724 | ||
725 | vn = net_generic(net, vlan_net_id); | |
65d292a2 | 726 | rtnl_kill_links(net, &vlan_link_ops); |
cd1c7014 | 727 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
728 | kfree(vn); |
729 | } | |
730 | ||
731 | static struct pernet_operations vlan_net_ops = { | |
732 | .init = vlan_init_net, | |
733 | .exit = vlan_exit_net, | |
734 | }; | |
735 | ||
69ab4b7d PM |
736 | static int __init vlan_proto_init(void) |
737 | { | |
738 | int err; | |
739 | ||
740 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
741 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
742 | ||
d9ed0f0e PE |
743 | err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops); |
744 | if (err < 0) | |
745 | goto err0; | |
746 | ||
69ab4b7d PM |
747 | err = register_netdevice_notifier(&vlan_notifier_block); |
748 | if (err < 0) | |
749 | goto err2; | |
750 | ||
70c03b49 | 751 | err = vlan_gvrp_init(); |
69ab4b7d PM |
752 | if (err < 0) |
753 | goto err3; | |
754 | ||
70c03b49 PM |
755 | err = vlan_netlink_init(); |
756 | if (err < 0) | |
757 | goto err4; | |
758 | ||
69ab4b7d PM |
759 | dev_add_pack(&vlan_packet_type); |
760 | vlan_ioctl_set(vlan_ioctl_handler); | |
761 | return 0; | |
762 | ||
70c03b49 PM |
763 | err4: |
764 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
765 | err3: |
766 | unregister_netdevice_notifier(&vlan_notifier_block); | |
767 | err2: | |
d9ed0f0e PE |
768 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
769 | err0: | |
69ab4b7d PM |
770 | return err; |
771 | } | |
772 | ||
773 | static void __exit vlan_cleanup_module(void) | |
774 | { | |
775 | unsigned int i; | |
776 | ||
777 | vlan_ioctl_set(NULL); | |
778 | vlan_netlink_fini(); | |
779 | ||
780 | unregister_netdevice_notifier(&vlan_notifier_block); | |
781 | ||
782 | dev_remove_pack(&vlan_packet_type); | |
783 | ||
784 | /* This table must be empty if there are no module references left. */ | |
785 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) | |
786 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
787 | ||
d9ed0f0e | 788 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
6e327c11 | 789 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
790 | |
791 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
792 | } |
793 | ||
794 | module_init(vlan_proto_init); | |
795 | module_exit(vlan_cleanup_module); | |
796 | ||
1da177e4 LT |
797 | MODULE_LICENSE("GPL"); |
798 | MODULE_VERSION(DRV_VERSION); |