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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 | |
1da177e4 LT |
47 | /* Our listing of VLAN group(s) */ |
48 | static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; | |
1da177e4 | 49 | |
b3020061 SH |
50 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
51 | const char vlan_version[] = DRV_VERSION; | |
52 | static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
53 | static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
1da177e4 | 54 | |
7546dd97 | 55 | static struct packet_type vlan_packet_type __read_mostly = { |
09640e63 | 56 | .type = cpu_to_be16(ETH_P_8021Q), |
1da177e4 LT |
57 | .func = vlan_skb_recv, /* VLAN receive method */ |
58 | }; | |
59 | ||
1da177e4 LT |
60 | /* End of global variables definitions. */ |
61 | ||
2029cc2c PM |
62 | static inline unsigned int vlan_grp_hashfn(unsigned int idx) |
63 | { | |
64 | return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK; | |
65 | } | |
66 | ||
1da177e4 | 67 | /* Must be invoked with RCU read lock (no preempt) */ |
a9fde260 | 68 | static struct vlan_group *__vlan_find_group(struct net_device *real_dev) |
1da177e4 LT |
69 | { |
70 | struct vlan_group *grp; | |
71 | struct hlist_node *n; | |
a9fde260 | 72 | int hash = vlan_grp_hashfn(real_dev->ifindex); |
1da177e4 LT |
73 | |
74 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { | |
a9fde260 | 75 | if (grp->real_dev == real_dev) |
1da177e4 LT |
76 | return grp; |
77 | } | |
78 | ||
79 | return NULL; | |
80 | } | |
81 | ||
82 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. | |
83 | * | |
84 | * Must be invoked with RCU read lock (no preempt) | |
85 | */ | |
9bb8582e | 86 | struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 87 | { |
a9fde260 | 88 | struct vlan_group *grp = __vlan_find_group(real_dev); |
1da177e4 LT |
89 | |
90 | if (grp) | |
9bb8582e | 91 | return vlan_group_get_device(grp, vlan_id); |
1da177e4 LT |
92 | |
93 | return NULL; | |
94 | } | |
95 | ||
5c15bdec DA |
96 | static void vlan_group_free(struct vlan_group *grp) |
97 | { | |
98 | int i; | |
99 | ||
2029cc2c | 100 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
5c15bdec DA |
101 | kfree(grp->vlan_devices_arrays[i]); |
102 | kfree(grp); | |
103 | } | |
104 | ||
a9fde260 | 105 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
42429aae PM |
106 | { |
107 | struct vlan_group *grp; | |
42429aae PM |
108 | |
109 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
110 | if (!grp) | |
111 | return NULL; | |
112 | ||
a9fde260 | 113 | grp->real_dev = real_dev; |
42429aae | 114 | hlist_add_head_rcu(&grp->hlist, |
a9fde260 | 115 | &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); |
42429aae | 116 | return grp; |
67727184 | 117 | } |
42429aae | 118 | |
9bb8582e | 119 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
67727184 PE |
120 | { |
121 | struct net_device **array; | |
122 | unsigned int size; | |
123 | ||
124 | ASSERT_RTNL(); | |
125 | ||
9bb8582e | 126 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
67727184 PE |
127 | if (array != NULL) |
128 | return 0; | |
129 | ||
130 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
131 | array = kzalloc(size, GFP_KERNEL); | |
132 | if (array == NULL) | |
133 | return -ENOBUFS; | |
134 | ||
9bb8582e | 135 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
67727184 | 136 | return 0; |
42429aae PM |
137 | } |
138 | ||
1da177e4 LT |
139 | static void vlan_rcu_free(struct rcu_head *rcu) |
140 | { | |
5c15bdec | 141 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
142 | } |
143 | ||
23289a37 | 144 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 145 | { |
9dfebcc6 | 146 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
af301517 | 147 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 148 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 | 149 | struct vlan_group *grp; |
9bb8582e | 150 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
151 | |
152 | ASSERT_RTNL(); | |
acc5efbc | 153 | |
a9fde260 | 154 | grp = __vlan_find_group(real_dev); |
af301517 | 155 | BUG_ON(!grp); |
acc5efbc | 156 | |
acc5efbc PM |
157 | /* Take it out of our own structures, but be sure to interlock with |
158 | * HW accelerating devices or SW vlan input packet processing. | |
159 | */ | |
160 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
656299f7 | 161 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 162 | |
af301517 | 163 | grp->nr_vlans--; |
acc5efbc | 164 | |
29906f6a PM |
165 | vlan_group_set_device(grp, vlan_id, NULL); |
166 | if (!grp->killall) | |
63c8099d | 167 | synchronize_net(); |
29906f6a | 168 | |
23289a37 | 169 | unregister_netdevice_queue(dev, head); |
ce305002 | 170 | |
acc5efbc | 171 | /* If the group is now empty, kill off the group. */ |
af301517 | 172 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
173 | vlan_gvrp_uninit_applicant(real_dev); |
174 | ||
acc5efbc | 175 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 176 | ops->ndo_vlan_rx_register(real_dev, NULL); |
acc5efbc PM |
177 | |
178 | hlist_del_rcu(&grp->hlist); | |
1da177e4 | 179 | |
acc5efbc PM |
180 | /* Free the group, after all cpu's are done. */ |
181 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
182 | } |
183 | ||
af301517 PM |
184 | /* Get rid of the vlan's reference to real_dev */ |
185 | dev_put(real_dev); | |
1da177e4 LT |
186 | } |
187 | ||
9bb8582e | 188 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 189 | { |
656299f7 SH |
190 | const char *name = real_dev->name; |
191 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 192 | |
1da177e4 | 193 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 194 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 195 | return -EOPNOTSUPP; |
1da177e4 LT |
196 | } |
197 | ||
656299f7 | 198 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) { |
40f98e1a | 199 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 200 | return -EOPNOTSUPP; |
1da177e4 LT |
201 | } |
202 | ||
203 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
656299f7 | 204 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
40f98e1a | 205 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 206 | return -EOPNOTSUPP; |
1da177e4 LT |
207 | } |
208 | ||
40f98e1a | 209 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 210 | return -EEXIST; |
1da177e4 | 211 | |
c1d3ee99 PM |
212 | return 0; |
213 | } | |
214 | ||
07b5b17e | 215 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 216 | { |
9dfebcc6 | 217 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 218 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 219 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 220 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
221 | struct vlan_group *grp, *ngrp = NULL; |
222 | int err; | |
223 | ||
a9fde260 | 224 | grp = __vlan_find_group(real_dev); |
e89fe42c | 225 | if (!grp) { |
a9fde260 | 226 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
227 | if (!grp) |
228 | return -ENOBUFS; | |
70c03b49 PM |
229 | err = vlan_gvrp_init_applicant(real_dev); |
230 | if (err < 0) | |
231 | goto out_free_group; | |
e89fe42c PM |
232 | } |
233 | ||
67727184 PE |
234 | err = vlan_group_prealloc_vid(grp, vlan_id); |
235 | if (err < 0) | |
70c03b49 | 236 | goto out_uninit_applicant; |
67727184 | 237 | |
e89fe42c PM |
238 | err = register_netdevice(dev); |
239 | if (err < 0) | |
70c03b49 | 240 | goto out_uninit_applicant; |
e89fe42c PM |
241 | |
242 | /* Account for reference in struct vlan_dev_info */ | |
243 | dev_hold(real_dev); | |
244 | ||
fc4a7489 | 245 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
246 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
247 | ||
248 | /* So, got the sucker initialized, now lets place | |
249 | * it into our local structure. | |
250 | */ | |
251 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
252 | grp->nr_vlans++; |
253 | ||
e89fe42c | 254 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 255 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
e89fe42c | 256 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 257 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 258 | |
e89fe42c PM |
259 | return 0; |
260 | ||
70c03b49 PM |
261 | out_uninit_applicant: |
262 | if (ngrp) | |
263 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c | 264 | out_free_group: |
6b863d1d ED |
265 | if (ngrp) { |
266 | hlist_del_rcu(&ngrp->hlist); | |
267 | /* Free the group, after all cpu's are done. */ | |
268 | call_rcu(&ngrp->rcu, vlan_rcu_free); | |
269 | } | |
e89fe42c PM |
270 | return err; |
271 | } | |
272 | ||
c1d3ee99 | 273 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 274 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 275 | */ |
9bb8582e | 276 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 277 | { |
c1d3ee99 | 278 | struct net_device *new_dev; |
7a17a2f7 PE |
279 | struct net *net = dev_net(real_dev); |
280 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 281 | char name[IFNAMSIZ]; |
2ae0bf69 | 282 | int err; |
c1d3ee99 | 283 | |
9bb8582e | 284 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 285 | return -ERANGE; |
c1d3ee99 | 286 | |
9bb8582e | 287 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
288 | if (err < 0) |
289 | return err; | |
c1d3ee99 | 290 | |
1da177e4 | 291 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 292 | switch (vn->name_type) { |
1da177e4 LT |
293 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
294 | /* name will look like: eth1.0005 */ | |
9bb8582e | 295 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
296 | break; |
297 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
298 | /* Put our vlan.VID in the name. | |
299 | * Name will look like: vlan5 | |
300 | */ | |
9bb8582e | 301 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
302 | break; |
303 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
304 | /* Put our vlan.VID in the name. | |
305 | * Name will look like: eth0.5 | |
306 | */ | |
9bb8582e | 307 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
308 | break; |
309 | case VLAN_NAME_TYPE_PLUS_VID: | |
310 | /* Put our vlan.VID in the name. | |
311 | * Name will look like: vlan0005 | |
312 | */ | |
313 | default: | |
9bb8582e | 314 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 315 | } |
122952fc | 316 | |
2e59af3d ED |
317 | new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name, |
318 | vlan_setup, real_dev->num_tx_queues); | |
5dd8d1e9 | 319 | |
1da177e4 | 320 | if (new_dev == NULL) |
2ae0bf69 | 321 | return -ENOBUFS; |
1da177e4 | 322 | |
2e59af3d | 323 | new_dev->real_num_tx_queues = real_dev->real_num_tx_queues; |
65d292a2 | 324 | dev_net_set(new_dev, net); |
1da177e4 LT |
325 | /* need 4 bytes for extra VLAN header info, |
326 | * hope the underlying device can handle it. | |
327 | */ | |
328 | new_dev->mtu = real_dev->mtu; | |
329 | ||
9bb8582e | 330 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
331 | vlan_dev_info(new_dev)->real_dev = real_dev; |
332 | vlan_dev_info(new_dev)->dent = NULL; | |
333 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 334 | |
07b5b17e | 335 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
336 | err = register_vlan_dev(new_dev); |
337 | if (err < 0) | |
e89fe42c | 338 | goto out_free_newdev; |
1da177e4 | 339 | |
2ae0bf69 | 340 | return 0; |
1da177e4 | 341 | |
1da177e4 LT |
342 | out_free_newdev: |
343 | free_netdev(new_dev); | |
2ae0bf69 | 344 | return err; |
1da177e4 LT |
345 | } |
346 | ||
8c979c26 PM |
347 | static void vlan_sync_address(struct net_device *dev, |
348 | struct net_device *vlandev) | |
349 | { | |
9dfebcc6 | 350 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
351 | |
352 | /* May be called without an actual change */ | |
353 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
354 | return; | |
355 | ||
356 | /* vlan address was different from the old address and is equal to | |
357 | * the new address */ | |
358 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
359 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 360 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
361 | |
362 | /* vlan address was equal to the old address and is different from | |
363 | * the new address */ | |
364 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
365 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 366 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 PM |
367 | |
368 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
369 | } | |
370 | ||
5fb13570 PM |
371 | static void vlan_transfer_features(struct net_device *dev, |
372 | struct net_device *vlandev) | |
373 | { | |
374 | unsigned long old_features = vlandev->features; | |
375 | ||
289c79a4 PM |
376 | vlandev->features &= ~dev->vlan_features; |
377 | vlandev->features |= dev->features & dev->vlan_features; | |
1ae4be22 | 378 | vlandev->gso_max_size = dev->gso_max_size; |
b85daa53 VD |
379 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
380 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
381 | #endif | |
f6b9f4b2 VD |
382 | vlandev->real_num_tx_queues = dev->real_num_tx_queues; |
383 | BUG_ON(vlandev->real_num_tx_queues > vlandev->num_tx_queues); | |
5fb13570 PM |
384 | |
385 | if (old_features != vlandev->features) | |
386 | netdev_features_change(vlandev); | |
387 | } | |
388 | ||
802fb176 PE |
389 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
390 | { | |
391 | switch (event) { | |
392 | case NETDEV_CHANGENAME: | |
393 | vlan_proc_rem_dev(dev); | |
394 | if (vlan_proc_add_dev(dev) < 0) | |
395 | pr_warning("8021q: failed to change proc name for %s\n", | |
396 | dev->name); | |
397 | break; | |
30688a9a PE |
398 | case NETDEV_REGISTER: |
399 | if (vlan_proc_add_dev(dev) < 0) | |
400 | pr_warning("8021q: failed to add proc entry for %s\n", | |
401 | dev->name); | |
402 | break; | |
403 | case NETDEV_UNREGISTER: | |
404 | vlan_proc_rem_dev(dev); | |
405 | break; | |
802fb176 PE |
406 | } |
407 | } | |
408 | ||
2029cc2c PM |
409 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
410 | void *ptr) | |
1da177e4 LT |
411 | { |
412 | struct net_device *dev = ptr; | |
802fb176 | 413 | struct vlan_group *grp; |
1da177e4 LT |
414 | int i, flgs; |
415 | struct net_device *vlandev; | |
5e756593 | 416 | struct vlan_dev_info *vlan; |
29906f6a | 417 | LIST_HEAD(list); |
1da177e4 | 418 | |
81d85346 | 419 | if (is_vlan_dev(dev)) |
802fb176 | 420 | __vlan_device_event(dev, event); |
802fb176 | 421 | |
a9fde260 | 422 | grp = __vlan_find_group(dev); |
1da177e4 LT |
423 | if (!grp) |
424 | goto out; | |
425 | ||
426 | /* It is OK that we do not hold the group lock right now, | |
427 | * as we run under the RTNL lock. | |
428 | */ | |
429 | ||
430 | switch (event) { | |
431 | case NETDEV_CHANGE: | |
432 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 433 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 434 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
435 | if (!vlandev) |
436 | continue; | |
437 | ||
fc4a7489 | 438 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
439 | } |
440 | break; | |
441 | ||
8c979c26 PM |
442 | case NETDEV_CHANGEADDR: |
443 | /* Adjust unicast filters on underlying device */ | |
444 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
445 | vlandev = vlan_group_get_device(grp, i); | |
446 | if (!vlandev) | |
447 | continue; | |
448 | ||
d932e04a PM |
449 | flgs = vlandev->flags; |
450 | if (!(flgs & IFF_UP)) | |
451 | continue; | |
452 | ||
8c979c26 PM |
453 | vlan_sync_address(dev, vlandev); |
454 | } | |
2e477c9b HX |
455 | break; |
456 | ||
457 | case NETDEV_CHANGEMTU: | |
458 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
459 | vlandev = vlan_group_get_device(grp, i); | |
460 | if (!vlandev) | |
461 | continue; | |
462 | ||
463 | if (vlandev->mtu <= dev->mtu) | |
464 | continue; | |
465 | ||
466 | dev_set_mtu(vlandev, dev->mtu); | |
467 | } | |
8c979c26 PM |
468 | break; |
469 | ||
5fb13570 PM |
470 | case NETDEV_FEAT_CHANGE: |
471 | /* Propagate device features to underlying device */ | |
472 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
473 | vlandev = vlan_group_get_device(grp, i); | |
474 | if (!vlandev) | |
475 | continue; | |
476 | ||
477 | vlan_transfer_features(dev, vlandev); | |
478 | } | |
479 | ||
480 | break; | |
481 | ||
1da177e4 LT |
482 | case NETDEV_DOWN: |
483 | /* Put all VLANs for this dev in the down state too. */ | |
484 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 485 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
486 | if (!vlandev) |
487 | continue; | |
488 | ||
489 | flgs = vlandev->flags; | |
490 | if (!(flgs & IFF_UP)) | |
491 | continue; | |
492 | ||
5e756593 PM |
493 | vlan = vlan_dev_info(vlandev); |
494 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
495 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 496 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
497 | } |
498 | break; | |
499 | ||
500 | case NETDEV_UP: | |
501 | /* Put all VLANs for this dev in the up state too. */ | |
502 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 503 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
504 | if (!vlandev) |
505 | continue; | |
122952fc | 506 | |
1da177e4 LT |
507 | flgs = vlandev->flags; |
508 | if (flgs & IFF_UP) | |
509 | continue; | |
510 | ||
5e756593 PM |
511 | vlan = vlan_dev_info(vlandev); |
512 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
513 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 514 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
515 | } |
516 | break; | |
122952fc | 517 | |
1da177e4 | 518 | case NETDEV_UNREGISTER: |
29906f6a PM |
519 | /* Delete all VLANs for this dev. */ |
520 | grp->killall = 1; | |
521 | ||
522 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
523 | vlandev = vlan_group_get_device(grp, i); | |
524 | if (!vlandev) | |
525 | continue; | |
526 | ||
527 | /* unregistration of last vlan destroys group, abort | |
528 | * afterwards */ | |
529 | if (grp->nr_vlans == 1) | |
530 | i = VLAN_GROUP_ARRAY_LEN; | |
531 | ||
532 | unregister_vlan_dev(vlandev, &list); | |
533 | } | |
534 | unregister_netdevice_many(&list); | |
1da177e4 | 535 | break; |
1c01fe14 JP |
536 | |
537 | case NETDEV_PRE_TYPE_CHANGE: | |
538 | /* Forbid underlaying device to change its type. */ | |
539 | return NOTIFY_BAD; | |
3ff50b79 | 540 | } |
1da177e4 LT |
541 | |
542 | out: | |
543 | return NOTIFY_DONE; | |
544 | } | |
545 | ||
69ab4b7d PM |
546 | static struct notifier_block vlan_notifier_block __read_mostly = { |
547 | .notifier_call = vlan_device_event, | |
548 | }; | |
549 | ||
1da177e4 LT |
550 | /* |
551 | * VLAN IOCTL handler. | |
552 | * o execute requested action or pass command to the device driver | |
553 | * arg is really a struct vlan_ioctl_args __user *. | |
554 | */ | |
881d966b | 555 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 556 | { |
c17d8874 | 557 | int err; |
1da177e4 | 558 | struct vlan_ioctl_args args; |
c17d8874 | 559 | struct net_device *dev = NULL; |
1da177e4 LT |
560 | |
561 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
562 | return -EFAULT; | |
563 | ||
564 | /* Null terminate this sucker, just in case. */ | |
565 | args.device1[23] = 0; | |
566 | args.u.device2[23] = 0; | |
567 | ||
c17d8874 PM |
568 | rtnl_lock(); |
569 | ||
1da177e4 LT |
570 | switch (args.cmd) { |
571 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
572 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
573 | case SET_VLAN_FLAG_CMD: | |
574 | case ADD_VLAN_CMD: | |
575 | case DEL_VLAN_CMD: | |
576 | case GET_VLAN_REALDEV_NAME_CMD: | |
577 | case GET_VLAN_VID_CMD: | |
578 | err = -ENODEV; | |
65d292a2 | 579 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
580 | if (!dev) |
581 | goto out; | |
582 | ||
583 | err = -EINVAL; | |
26a25239 | 584 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
585 | goto out; |
586 | } | |
587 | ||
588 | switch (args.cmd) { | |
589 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
590 | err = -EPERM; | |
1da177e4 | 591 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
592 | break; |
593 | vlan_dev_set_ingress_priority(dev, | |
594 | args.u.skb_priority, | |
595 | args.vlan_qos); | |
fffe470a | 596 | err = 0; |
1da177e4 LT |
597 | break; |
598 | ||
599 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 600 | err = -EPERM; |
1da177e4 | 601 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
602 | break; |
603 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
604 | args.u.skb_priority, |
605 | args.vlan_qos); | |
606 | break; | |
607 | ||
608 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 609 | err = -EPERM; |
1da177e4 | 610 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 611 | break; |
b3ce0325 PM |
612 | err = vlan_dev_change_flags(dev, |
613 | args.vlan_qos ? args.u.flag : 0, | |
614 | args.u.flag); | |
1da177e4 LT |
615 | break; |
616 | ||
617 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 618 | err = -EPERM; |
1da177e4 | 619 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 620 | break; |
c17d8874 PM |
621 | if ((args.u.name_type >= 0) && |
622 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
623 | struct vlan_net *vn; |
624 | ||
625 | vn = net_generic(net, vlan_net_id); | |
626 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
627 | err = 0; |
628 | } else { | |
629 | err = -EINVAL; | |
630 | } | |
631 | break; | |
632 | ||
633 | case ADD_VLAN_CMD: | |
c17d8874 | 634 | err = -EPERM; |
1da177e4 | 635 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 636 | break; |
2ae0bf69 | 637 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
638 | break; |
639 | ||
640 | case DEL_VLAN_CMD: | |
c17d8874 | 641 | err = -EPERM; |
1da177e4 | 642 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 643 | break; |
23289a37 | 644 | unregister_vlan_dev(dev, NULL); |
af301517 | 645 | err = 0; |
1da177e4 LT |
646 | break; |
647 | ||
1da177e4 | 648 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 649 | err = 0; |
c17d8874 | 650 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 651 | if (copy_to_user(arg, &args, |
2029cc2c | 652 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 653 | err = -EFAULT; |
1da177e4 LT |
654 | break; |
655 | ||
656 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 657 | err = 0; |
22d1ba74 | 658 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 659 | if (copy_to_user(arg, &args, |
2029cc2c | 660 | sizeof(struct vlan_ioctl_args))) |
122952fc | 661 | err = -EFAULT; |
1da177e4 LT |
662 | break; |
663 | ||
664 | default: | |
198a291c | 665 | err = -EOPNOTSUPP; |
c17d8874 | 666 | break; |
3ff50b79 | 667 | } |
7eb1b3d3 | 668 | out: |
c17d8874 | 669 | rtnl_unlock(); |
1da177e4 LT |
670 | return err; |
671 | } | |
672 | ||
2c8c1e72 | 673 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 674 | { |
946d1a92 | 675 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 676 | int err; |
d9ed0f0e | 677 | |
7a17a2f7 PE |
678 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
679 | ||
cd1c7014 | 680 | err = vlan_proc_init(net); |
cd1c7014 | 681 | |
d9ed0f0e PE |
682 | return err; |
683 | } | |
684 | ||
2c8c1e72 | 685 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 686 | { |
cd1c7014 | 687 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
688 | } |
689 | ||
690 | static struct pernet_operations vlan_net_ops = { | |
691 | .init = vlan_init_net, | |
692 | .exit = vlan_exit_net, | |
946d1a92 EB |
693 | .id = &vlan_net_id, |
694 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
695 | }; |
696 | ||
69ab4b7d PM |
697 | static int __init vlan_proto_init(void) |
698 | { | |
699 | int err; | |
700 | ||
701 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
702 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
703 | ||
91e2ff35 | 704 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
705 | if (err < 0) |
706 | goto err0; | |
707 | ||
69ab4b7d PM |
708 | err = register_netdevice_notifier(&vlan_notifier_block); |
709 | if (err < 0) | |
710 | goto err2; | |
711 | ||
70c03b49 | 712 | err = vlan_gvrp_init(); |
69ab4b7d PM |
713 | if (err < 0) |
714 | goto err3; | |
715 | ||
70c03b49 PM |
716 | err = vlan_netlink_init(); |
717 | if (err < 0) | |
718 | goto err4; | |
719 | ||
69ab4b7d PM |
720 | dev_add_pack(&vlan_packet_type); |
721 | vlan_ioctl_set(vlan_ioctl_handler); | |
722 | return 0; | |
723 | ||
70c03b49 PM |
724 | err4: |
725 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
726 | err3: |
727 | unregister_netdevice_notifier(&vlan_notifier_block); | |
728 | err2: | |
91e2ff35 | 729 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 730 | err0: |
69ab4b7d PM |
731 | return err; |
732 | } | |
733 | ||
734 | static void __exit vlan_cleanup_module(void) | |
735 | { | |
736 | unsigned int i; | |
737 | ||
738 | vlan_ioctl_set(NULL); | |
739 | vlan_netlink_fini(); | |
740 | ||
741 | unregister_netdevice_notifier(&vlan_notifier_block); | |
742 | ||
743 | dev_remove_pack(&vlan_packet_type); | |
744 | ||
745 | /* This table must be empty if there are no module references left. */ | |
746 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) | |
747 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
748 | ||
91e2ff35 | 749 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 750 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
751 | |
752 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
753 | } |
754 | ||
755 | module_init(vlan_proto_init); | |
756 | module_exit(vlan_cleanup_module); | |
757 | ||
1da177e4 LT |
758 | MODULE_LICENSE("GPL"); |
759 | MODULE_VERSION(DRV_VERSION); |