Commit | Line | Data |
---|---|---|
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 | 157 | /* Take it out of our own structures, but be sure to interlock with |
ad1afb00 PG |
158 | * HW accelerating devices or SW vlan input packet processing if |
159 | * VLAN is not 0 (leave it there for 802.1p). | |
acc5efbc | 160 | */ |
ad1afb00 | 161 | if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) |
656299f7 | 162 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 163 | |
af301517 | 164 | grp->nr_vlans--; |
acc5efbc | 165 | |
29906f6a PM |
166 | vlan_group_set_device(grp, vlan_id, NULL); |
167 | if (!grp->killall) | |
63c8099d | 168 | synchronize_net(); |
29906f6a | 169 | |
23289a37 | 170 | unregister_netdevice_queue(dev, head); |
ce305002 | 171 | |
acc5efbc | 172 | /* If the group is now empty, kill off the group. */ |
af301517 | 173 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
174 | vlan_gvrp_uninit_applicant(real_dev); |
175 | ||
acc5efbc | 176 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 177 | ops->ndo_vlan_rx_register(real_dev, NULL); |
acc5efbc PM |
178 | |
179 | hlist_del_rcu(&grp->hlist); | |
1da177e4 | 180 | |
acc5efbc PM |
181 | /* Free the group, after all cpu's are done. */ |
182 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
183 | } |
184 | ||
af301517 PM |
185 | /* Get rid of the vlan's reference to real_dev */ |
186 | dev_put(real_dev); | |
1da177e4 LT |
187 | } |
188 | ||
9bb8582e | 189 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 190 | { |
656299f7 SH |
191 | const char *name = real_dev->name; |
192 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 193 | |
1da177e4 | 194 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 195 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 196 | return -EOPNOTSUPP; |
1da177e4 LT |
197 | } |
198 | ||
656299f7 | 199 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) { |
40f98e1a | 200 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 201 | return -EOPNOTSUPP; |
1da177e4 LT |
202 | } |
203 | ||
204 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
656299f7 | 205 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
40f98e1a | 206 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 207 | return -EOPNOTSUPP; |
1da177e4 LT |
208 | } |
209 | ||
40f98e1a | 210 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 211 | return -EEXIST; |
1da177e4 | 212 | |
c1d3ee99 PM |
213 | return 0; |
214 | } | |
215 | ||
07b5b17e | 216 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 217 | { |
9dfebcc6 | 218 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 219 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 220 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 221 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
222 | struct vlan_group *grp, *ngrp = NULL; |
223 | int err; | |
224 | ||
a9fde260 | 225 | grp = __vlan_find_group(real_dev); |
e89fe42c | 226 | if (!grp) { |
a9fde260 | 227 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
228 | if (!grp) |
229 | return -ENOBUFS; | |
70c03b49 PM |
230 | err = vlan_gvrp_init_applicant(real_dev); |
231 | if (err < 0) | |
232 | goto out_free_group; | |
e89fe42c PM |
233 | } |
234 | ||
67727184 PE |
235 | err = vlan_group_prealloc_vid(grp, vlan_id); |
236 | if (err < 0) | |
70c03b49 | 237 | goto out_uninit_applicant; |
67727184 | 238 | |
e89fe42c PM |
239 | err = register_netdevice(dev); |
240 | if (err < 0) | |
70c03b49 | 241 | goto out_uninit_applicant; |
e89fe42c PM |
242 | |
243 | /* Account for reference in struct vlan_dev_info */ | |
244 | dev_hold(real_dev); | |
245 | ||
fc4a7489 | 246 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
247 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
248 | ||
249 | /* So, got the sucker initialized, now lets place | |
250 | * it into our local structure. | |
251 | */ | |
252 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
253 | grp->nr_vlans++; |
254 | ||
e89fe42c | 255 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 256 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
e89fe42c | 257 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 258 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 259 | |
e89fe42c PM |
260 | return 0; |
261 | ||
70c03b49 PM |
262 | out_uninit_applicant: |
263 | if (ngrp) | |
264 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c | 265 | out_free_group: |
6b863d1d ED |
266 | if (ngrp) { |
267 | hlist_del_rcu(&ngrp->hlist); | |
268 | /* Free the group, after all cpu's are done. */ | |
269 | call_rcu(&ngrp->rcu, vlan_rcu_free); | |
270 | } | |
e89fe42c PM |
271 | return err; |
272 | } | |
273 | ||
c1d3ee99 | 274 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 275 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 276 | */ |
9bb8582e | 277 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 278 | { |
c1d3ee99 | 279 | struct net_device *new_dev; |
7a17a2f7 PE |
280 | struct net *net = dev_net(real_dev); |
281 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 282 | char name[IFNAMSIZ]; |
2ae0bf69 | 283 | int err; |
c1d3ee99 | 284 | |
9bb8582e | 285 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 286 | return -ERANGE; |
c1d3ee99 | 287 | |
9bb8582e | 288 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
289 | if (err < 0) |
290 | return err; | |
c1d3ee99 | 291 | |
1da177e4 | 292 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 293 | switch (vn->name_type) { |
1da177e4 LT |
294 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
295 | /* name will look like: eth1.0005 */ | |
9bb8582e | 296 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
297 | break; |
298 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
299 | /* Put our vlan.VID in the name. | |
300 | * Name will look like: vlan5 | |
301 | */ | |
9bb8582e | 302 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
303 | break; |
304 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
305 | /* Put our vlan.VID in the name. | |
306 | * Name will look like: eth0.5 | |
307 | */ | |
9bb8582e | 308 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
309 | break; |
310 | case VLAN_NAME_TYPE_PLUS_VID: | |
311 | /* Put our vlan.VID in the name. | |
312 | * Name will look like: vlan0005 | |
313 | */ | |
314 | default: | |
9bb8582e | 315 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 316 | } |
122952fc | 317 | |
2e59af3d ED |
318 | new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name, |
319 | vlan_setup, real_dev->num_tx_queues); | |
5dd8d1e9 | 320 | |
1da177e4 | 321 | if (new_dev == NULL) |
2ae0bf69 | 322 | return -ENOBUFS; |
1da177e4 | 323 | |
5df8dbd7 | 324 | netif_copy_real_num_queues(new_dev, real_dev); |
65d292a2 | 325 | dev_net_set(new_dev, net); |
1da177e4 LT |
326 | /* need 4 bytes for extra VLAN header info, |
327 | * hope the underlying device can handle it. | |
328 | */ | |
329 | new_dev->mtu = real_dev->mtu; | |
330 | ||
9bb8582e | 331 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
332 | vlan_dev_info(new_dev)->real_dev = real_dev; |
333 | vlan_dev_info(new_dev)->dent = NULL; | |
334 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 335 | |
07b5b17e | 336 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
337 | err = register_vlan_dev(new_dev); |
338 | if (err < 0) | |
e89fe42c | 339 | goto out_free_newdev; |
1da177e4 | 340 | |
2ae0bf69 | 341 | return 0; |
1da177e4 | 342 | |
1da177e4 LT |
343 | out_free_newdev: |
344 | free_netdev(new_dev); | |
2ae0bf69 | 345 | return err; |
1da177e4 LT |
346 | } |
347 | ||
8c979c26 PM |
348 | static void vlan_sync_address(struct net_device *dev, |
349 | struct net_device *vlandev) | |
350 | { | |
9dfebcc6 | 351 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
352 | |
353 | /* May be called without an actual change */ | |
354 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
355 | return; | |
356 | ||
357 | /* vlan address was different from the old address and is equal to | |
358 | * the new address */ | |
359 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
360 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 361 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
362 | |
363 | /* vlan address was equal to the old address and is different from | |
364 | * the new address */ | |
365 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
366 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 367 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 PM |
368 | |
369 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
370 | } | |
371 | ||
5fb13570 PM |
372 | static void vlan_transfer_features(struct net_device *dev, |
373 | struct net_device *vlandev) | |
374 | { | |
375 | unsigned long old_features = vlandev->features; | |
376 | ||
289c79a4 PM |
377 | vlandev->features &= ~dev->vlan_features; |
378 | vlandev->features |= dev->features & dev->vlan_features; | |
1ae4be22 | 379 | vlandev->gso_max_size = dev->gso_max_size; |
b85daa53 VD |
380 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
381 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
382 | #endif | |
f6b9f4b2 VD |
383 | vlandev->real_num_tx_queues = dev->real_num_tx_queues; |
384 | BUG_ON(vlandev->real_num_tx_queues > vlandev->num_tx_queues); | |
5fb13570 PM |
385 | |
386 | if (old_features != vlandev->features) | |
387 | netdev_features_change(vlandev); | |
388 | } | |
389 | ||
802fb176 PE |
390 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
391 | { | |
392 | switch (event) { | |
393 | case NETDEV_CHANGENAME: | |
394 | vlan_proc_rem_dev(dev); | |
395 | if (vlan_proc_add_dev(dev) < 0) | |
396 | pr_warning("8021q: failed to change proc name for %s\n", | |
397 | dev->name); | |
398 | break; | |
30688a9a PE |
399 | case NETDEV_REGISTER: |
400 | if (vlan_proc_add_dev(dev) < 0) | |
401 | pr_warning("8021q: failed to add proc entry for %s\n", | |
402 | dev->name); | |
403 | break; | |
404 | case NETDEV_UNREGISTER: | |
405 | vlan_proc_rem_dev(dev); | |
406 | break; | |
802fb176 PE |
407 | } |
408 | } | |
409 | ||
2029cc2c PM |
410 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
411 | void *ptr) | |
1da177e4 LT |
412 | { |
413 | struct net_device *dev = ptr; | |
802fb176 | 414 | struct vlan_group *grp; |
1da177e4 LT |
415 | int i, flgs; |
416 | struct net_device *vlandev; | |
5e756593 | 417 | struct vlan_dev_info *vlan; |
29906f6a | 418 | LIST_HEAD(list); |
1da177e4 | 419 | |
81d85346 | 420 | if (is_vlan_dev(dev)) |
802fb176 | 421 | __vlan_device_event(dev, event); |
802fb176 | 422 | |
ad1afb00 PG |
423 | if ((event == NETDEV_UP) && |
424 | (dev->features & NETIF_F_HW_VLAN_FILTER) && | |
425 | dev->netdev_ops->ndo_vlan_rx_add_vid) { | |
426 | pr_info("8021q: adding VLAN 0 to HW filter on device %s\n", | |
427 | dev->name); | |
428 | dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); | |
429 | } | |
430 | ||
a9fde260 | 431 | grp = __vlan_find_group(dev); |
1da177e4 LT |
432 | if (!grp) |
433 | goto out; | |
434 | ||
435 | /* It is OK that we do not hold the group lock right now, | |
436 | * as we run under the RTNL lock. | |
437 | */ | |
438 | ||
439 | switch (event) { | |
440 | case NETDEV_CHANGE: | |
441 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 442 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 443 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
444 | if (!vlandev) |
445 | continue; | |
446 | ||
fc4a7489 | 447 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
448 | } |
449 | break; | |
450 | ||
8c979c26 PM |
451 | case NETDEV_CHANGEADDR: |
452 | /* Adjust unicast filters on underlying device */ | |
453 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
454 | vlandev = vlan_group_get_device(grp, i); | |
455 | if (!vlandev) | |
456 | continue; | |
457 | ||
d932e04a PM |
458 | flgs = vlandev->flags; |
459 | if (!(flgs & IFF_UP)) | |
460 | continue; | |
461 | ||
8c979c26 PM |
462 | vlan_sync_address(dev, vlandev); |
463 | } | |
2e477c9b HX |
464 | break; |
465 | ||
466 | case NETDEV_CHANGEMTU: | |
467 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
468 | vlandev = vlan_group_get_device(grp, i); | |
469 | if (!vlandev) | |
470 | continue; | |
471 | ||
472 | if (vlandev->mtu <= dev->mtu) | |
473 | continue; | |
474 | ||
475 | dev_set_mtu(vlandev, dev->mtu); | |
476 | } | |
8c979c26 PM |
477 | break; |
478 | ||
5fb13570 PM |
479 | case NETDEV_FEAT_CHANGE: |
480 | /* Propagate device features to underlying device */ | |
481 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
482 | vlandev = vlan_group_get_device(grp, i); | |
483 | if (!vlandev) | |
484 | continue; | |
485 | ||
486 | vlan_transfer_features(dev, vlandev); | |
487 | } | |
488 | ||
489 | break; | |
490 | ||
1da177e4 LT |
491 | case NETDEV_DOWN: |
492 | /* Put all VLANs for this dev in the down state too. */ | |
493 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 494 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
495 | if (!vlandev) |
496 | continue; | |
497 | ||
498 | flgs = vlandev->flags; | |
499 | if (!(flgs & IFF_UP)) | |
500 | continue; | |
501 | ||
5e756593 PM |
502 | vlan = vlan_dev_info(vlandev); |
503 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
504 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 505 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
506 | } |
507 | break; | |
508 | ||
509 | case NETDEV_UP: | |
510 | /* Put all VLANs for this dev in the up state too. */ | |
511 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 512 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
513 | if (!vlandev) |
514 | continue; | |
122952fc | 515 | |
1da177e4 LT |
516 | flgs = vlandev->flags; |
517 | if (flgs & IFF_UP) | |
518 | continue; | |
519 | ||
5e756593 PM |
520 | vlan = vlan_dev_info(vlandev); |
521 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
522 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 523 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
524 | } |
525 | break; | |
122952fc | 526 | |
1da177e4 | 527 | case NETDEV_UNREGISTER: |
3b27e105 DL |
528 | /* twiddle thumbs on netns device moves */ |
529 | if (dev->reg_state != NETREG_UNREGISTERING) | |
530 | break; | |
531 | ||
29906f6a PM |
532 | /* Delete all VLANs for this dev. */ |
533 | grp->killall = 1; | |
534 | ||
535 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
536 | vlandev = vlan_group_get_device(grp, i); | |
537 | if (!vlandev) | |
538 | continue; | |
539 | ||
540 | /* unregistration of last vlan destroys group, abort | |
541 | * afterwards */ | |
542 | if (grp->nr_vlans == 1) | |
543 | i = VLAN_GROUP_ARRAY_LEN; | |
544 | ||
545 | unregister_vlan_dev(vlandev, &list); | |
546 | } | |
547 | unregister_netdevice_many(&list); | |
1da177e4 | 548 | break; |
1c01fe14 JP |
549 | |
550 | case NETDEV_PRE_TYPE_CHANGE: | |
551 | /* Forbid underlaying device to change its type. */ | |
552 | return NOTIFY_BAD; | |
3ff50b79 | 553 | } |
1da177e4 LT |
554 | |
555 | out: | |
556 | return NOTIFY_DONE; | |
557 | } | |
558 | ||
69ab4b7d PM |
559 | static struct notifier_block vlan_notifier_block __read_mostly = { |
560 | .notifier_call = vlan_device_event, | |
561 | }; | |
562 | ||
1da177e4 LT |
563 | /* |
564 | * VLAN IOCTL handler. | |
565 | * o execute requested action or pass command to the device driver | |
566 | * arg is really a struct vlan_ioctl_args __user *. | |
567 | */ | |
881d966b | 568 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 569 | { |
c17d8874 | 570 | int err; |
1da177e4 | 571 | struct vlan_ioctl_args args; |
c17d8874 | 572 | struct net_device *dev = NULL; |
1da177e4 LT |
573 | |
574 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
575 | return -EFAULT; | |
576 | ||
577 | /* Null terminate this sucker, just in case. */ | |
578 | args.device1[23] = 0; | |
579 | args.u.device2[23] = 0; | |
580 | ||
c17d8874 PM |
581 | rtnl_lock(); |
582 | ||
1da177e4 LT |
583 | switch (args.cmd) { |
584 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
585 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
586 | case SET_VLAN_FLAG_CMD: | |
587 | case ADD_VLAN_CMD: | |
588 | case DEL_VLAN_CMD: | |
589 | case GET_VLAN_REALDEV_NAME_CMD: | |
590 | case GET_VLAN_VID_CMD: | |
591 | err = -ENODEV; | |
65d292a2 | 592 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
593 | if (!dev) |
594 | goto out; | |
595 | ||
596 | err = -EINVAL; | |
26a25239 | 597 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
598 | goto out; |
599 | } | |
600 | ||
601 | switch (args.cmd) { | |
602 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
603 | err = -EPERM; | |
1da177e4 | 604 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
605 | break; |
606 | vlan_dev_set_ingress_priority(dev, | |
607 | args.u.skb_priority, | |
608 | args.vlan_qos); | |
fffe470a | 609 | err = 0; |
1da177e4 LT |
610 | break; |
611 | ||
612 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 613 | err = -EPERM; |
1da177e4 | 614 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
615 | break; |
616 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
617 | args.u.skb_priority, |
618 | args.vlan_qos); | |
619 | break; | |
620 | ||
621 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 622 | err = -EPERM; |
1da177e4 | 623 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 624 | break; |
b3ce0325 PM |
625 | err = vlan_dev_change_flags(dev, |
626 | args.vlan_qos ? args.u.flag : 0, | |
627 | args.u.flag); | |
1da177e4 LT |
628 | break; |
629 | ||
630 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 631 | err = -EPERM; |
1da177e4 | 632 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 633 | break; |
c17d8874 PM |
634 | if ((args.u.name_type >= 0) && |
635 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
636 | struct vlan_net *vn; |
637 | ||
638 | vn = net_generic(net, vlan_net_id); | |
639 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
640 | err = 0; |
641 | } else { | |
642 | err = -EINVAL; | |
643 | } | |
644 | break; | |
645 | ||
646 | case ADD_VLAN_CMD: | |
c17d8874 | 647 | err = -EPERM; |
1da177e4 | 648 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 649 | break; |
2ae0bf69 | 650 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
651 | break; |
652 | ||
653 | case DEL_VLAN_CMD: | |
c17d8874 | 654 | err = -EPERM; |
1da177e4 | 655 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 656 | break; |
23289a37 | 657 | unregister_vlan_dev(dev, NULL); |
af301517 | 658 | err = 0; |
1da177e4 LT |
659 | break; |
660 | ||
1da177e4 | 661 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 662 | err = 0; |
c17d8874 | 663 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 664 | if (copy_to_user(arg, &args, |
2029cc2c | 665 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 666 | err = -EFAULT; |
1da177e4 LT |
667 | break; |
668 | ||
669 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 670 | err = 0; |
22d1ba74 | 671 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 672 | if (copy_to_user(arg, &args, |
2029cc2c | 673 | sizeof(struct vlan_ioctl_args))) |
122952fc | 674 | err = -EFAULT; |
1da177e4 LT |
675 | break; |
676 | ||
677 | default: | |
198a291c | 678 | err = -EOPNOTSUPP; |
c17d8874 | 679 | break; |
3ff50b79 | 680 | } |
7eb1b3d3 | 681 | out: |
c17d8874 | 682 | rtnl_unlock(); |
1da177e4 LT |
683 | return err; |
684 | } | |
685 | ||
2c8c1e72 | 686 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 687 | { |
946d1a92 | 688 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 689 | int err; |
d9ed0f0e | 690 | |
7a17a2f7 PE |
691 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
692 | ||
cd1c7014 | 693 | err = vlan_proc_init(net); |
cd1c7014 | 694 | |
d9ed0f0e PE |
695 | return err; |
696 | } | |
697 | ||
2c8c1e72 | 698 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 699 | { |
cd1c7014 | 700 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
701 | } |
702 | ||
703 | static struct pernet_operations vlan_net_ops = { | |
704 | .init = vlan_init_net, | |
705 | .exit = vlan_exit_net, | |
946d1a92 EB |
706 | .id = &vlan_net_id, |
707 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
708 | }; |
709 | ||
69ab4b7d PM |
710 | static int __init vlan_proto_init(void) |
711 | { | |
712 | int err; | |
713 | ||
714 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
715 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
716 | ||
91e2ff35 | 717 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
718 | if (err < 0) |
719 | goto err0; | |
720 | ||
69ab4b7d PM |
721 | err = register_netdevice_notifier(&vlan_notifier_block); |
722 | if (err < 0) | |
723 | goto err2; | |
724 | ||
70c03b49 | 725 | err = vlan_gvrp_init(); |
69ab4b7d PM |
726 | if (err < 0) |
727 | goto err3; | |
728 | ||
70c03b49 PM |
729 | err = vlan_netlink_init(); |
730 | if (err < 0) | |
731 | goto err4; | |
732 | ||
69ab4b7d PM |
733 | dev_add_pack(&vlan_packet_type); |
734 | vlan_ioctl_set(vlan_ioctl_handler); | |
735 | return 0; | |
736 | ||
70c03b49 PM |
737 | err4: |
738 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
739 | err3: |
740 | unregister_netdevice_notifier(&vlan_notifier_block); | |
741 | err2: | |
91e2ff35 | 742 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 743 | err0: |
69ab4b7d PM |
744 | return err; |
745 | } | |
746 | ||
747 | static void __exit vlan_cleanup_module(void) | |
748 | { | |
749 | unsigned int i; | |
750 | ||
751 | vlan_ioctl_set(NULL); | |
752 | vlan_netlink_fini(); | |
753 | ||
754 | unregister_netdevice_notifier(&vlan_notifier_block); | |
755 | ||
756 | dev_remove_pack(&vlan_packet_type); | |
757 | ||
758 | /* This table must be empty if there are no module references left. */ | |
759 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) | |
760 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
761 | ||
91e2ff35 | 762 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 763 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
764 | |
765 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
766 | } |
767 | ||
768 | module_init(vlan_proto_init); | |
769 | module_exit(vlan_cleanup_module); | |
770 | ||
1da177e4 LT |
771 | MODULE_LICENSE("GPL"); |
772 | MODULE_VERSION(DRV_VERSION); |