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 | |
29906f6a PM |
164 | vlan_group_set_device(grp, vlan_id, NULL); |
165 | if (!grp->killall) | |
63c8099d | 166 | synchronize_net(); |
29906f6a | 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 | ||
2029cc2c PM |
187 | static void vlan_transfer_operstate(const struct net_device *dev, |
188 | struct net_device *vlandev) | |
ddd7bf9f SR |
189 | { |
190 | /* Have to respect userspace enforced dormant state | |
191 | * of real device, also must allow supplicant running | |
192 | * on VLAN device | |
193 | */ | |
194 | if (dev->operstate == IF_OPER_DORMANT) | |
195 | netif_dormant_on(vlandev); | |
196 | else | |
197 | netif_dormant_off(vlandev); | |
198 | ||
199 | if (netif_carrier_ok(dev)) { | |
200 | if (!netif_carrier_ok(vlandev)) | |
201 | netif_carrier_on(vlandev); | |
202 | } else { | |
203 | if (netif_carrier_ok(vlandev)) | |
204 | netif_carrier_off(vlandev); | |
205 | } | |
206 | } | |
207 | ||
9bb8582e | 208 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 209 | { |
656299f7 SH |
210 | const char *name = real_dev->name; |
211 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 212 | |
1da177e4 | 213 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
40f98e1a | 214 | pr_info("8021q: VLANs not supported on %s\n", name); |
c1d3ee99 | 215 | return -EOPNOTSUPP; |
1da177e4 LT |
216 | } |
217 | ||
656299f7 | 218 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) { |
40f98e1a | 219 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 220 | return -EOPNOTSUPP; |
1da177e4 LT |
221 | } |
222 | ||
223 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
656299f7 | 224 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
40f98e1a | 225 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 226 | return -EOPNOTSUPP; |
1da177e4 LT |
227 | } |
228 | ||
40f98e1a | 229 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 230 | return -EEXIST; |
1da177e4 | 231 | |
c1d3ee99 PM |
232 | return 0; |
233 | } | |
234 | ||
07b5b17e | 235 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 236 | { |
9dfebcc6 | 237 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
e89fe42c | 238 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 239 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 240 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
241 | struct vlan_group *grp, *ngrp = NULL; |
242 | int err; | |
243 | ||
a9fde260 | 244 | grp = __vlan_find_group(real_dev); |
e89fe42c | 245 | if (!grp) { |
a9fde260 | 246 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
247 | if (!grp) |
248 | return -ENOBUFS; | |
70c03b49 PM |
249 | err = vlan_gvrp_init_applicant(real_dev); |
250 | if (err < 0) | |
251 | goto out_free_group; | |
e89fe42c PM |
252 | } |
253 | ||
67727184 PE |
254 | err = vlan_group_prealloc_vid(grp, vlan_id); |
255 | if (err < 0) | |
70c03b49 | 256 | goto out_uninit_applicant; |
67727184 | 257 | |
e89fe42c PM |
258 | err = register_netdevice(dev); |
259 | if (err < 0) | |
70c03b49 | 260 | goto out_uninit_applicant; |
e89fe42c PM |
261 | |
262 | /* Account for reference in struct vlan_dev_info */ | |
263 | dev_hold(real_dev); | |
264 | ||
265 | vlan_transfer_operstate(real_dev, dev); | |
266 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ | |
267 | ||
268 | /* So, got the sucker initialized, now lets place | |
269 | * it into our local structure. | |
270 | */ | |
271 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
272 | grp->nr_vlans++; |
273 | ||
e89fe42c | 274 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
656299f7 | 275 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
e89fe42c | 276 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 277 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 278 | |
e89fe42c PM |
279 | return 0; |
280 | ||
70c03b49 PM |
281 | out_uninit_applicant: |
282 | if (ngrp) | |
283 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c PM |
284 | out_free_group: |
285 | if (ngrp) | |
286 | vlan_group_free(ngrp); | |
287 | return err; | |
288 | } | |
289 | ||
c1d3ee99 | 290 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 291 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 292 | */ |
9bb8582e | 293 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 294 | { |
c1d3ee99 | 295 | struct net_device *new_dev; |
7a17a2f7 PE |
296 | struct net *net = dev_net(real_dev); |
297 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 298 | char name[IFNAMSIZ]; |
2ae0bf69 | 299 | int err; |
c1d3ee99 | 300 | |
9bb8582e | 301 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 302 | return -ERANGE; |
c1d3ee99 | 303 | |
9bb8582e | 304 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
305 | if (err < 0) |
306 | return err; | |
c1d3ee99 | 307 | |
1da177e4 | 308 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 309 | switch (vn->name_type) { |
1da177e4 LT |
310 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
311 | /* name will look like: eth1.0005 */ | |
9bb8582e | 312 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
313 | break; |
314 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
315 | /* Put our vlan.VID in the name. | |
316 | * Name will look like: vlan5 | |
317 | */ | |
9bb8582e | 318 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
319 | break; |
320 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
321 | /* Put our vlan.VID in the name. | |
322 | * Name will look like: eth0.5 | |
323 | */ | |
9bb8582e | 324 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
325 | break; |
326 | case VLAN_NAME_TYPE_PLUS_VID: | |
327 | /* Put our vlan.VID in the name. | |
328 | * Name will look like: vlan0005 | |
329 | */ | |
330 | default: | |
9bb8582e | 331 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 332 | } |
122952fc | 333 | |
2e59af3d ED |
334 | new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name, |
335 | vlan_setup, real_dev->num_tx_queues); | |
5dd8d1e9 | 336 | |
1da177e4 | 337 | if (new_dev == NULL) |
2ae0bf69 | 338 | return -ENOBUFS; |
1da177e4 | 339 | |
2e59af3d | 340 | new_dev->real_num_tx_queues = real_dev->real_num_tx_queues; |
65d292a2 | 341 | dev_net_set(new_dev, net); |
1da177e4 LT |
342 | /* need 4 bytes for extra VLAN header info, |
343 | * hope the underlying device can handle it. | |
344 | */ | |
345 | new_dev->mtu = real_dev->mtu; | |
346 | ||
9bb8582e | 347 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
9dfebcc6 PM |
348 | vlan_dev_info(new_dev)->real_dev = real_dev; |
349 | vlan_dev_info(new_dev)->dent = NULL; | |
350 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 351 | |
07b5b17e | 352 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
353 | err = register_vlan_dev(new_dev); |
354 | if (err < 0) | |
e89fe42c | 355 | goto out_free_newdev; |
1da177e4 | 356 | |
2ae0bf69 | 357 | return 0; |
1da177e4 | 358 | |
1da177e4 LT |
359 | out_free_newdev: |
360 | free_netdev(new_dev); | |
2ae0bf69 | 361 | return err; |
1da177e4 LT |
362 | } |
363 | ||
8c979c26 PM |
364 | static void vlan_sync_address(struct net_device *dev, |
365 | struct net_device *vlandev) | |
366 | { | |
9dfebcc6 | 367 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
8c979c26 PM |
368 | |
369 | /* May be called without an actual change */ | |
370 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
371 | return; | |
372 | ||
373 | /* vlan address was different from the old address and is equal to | |
374 | * the new address */ | |
375 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
376 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
ccffad25 | 377 | dev_unicast_delete(dev, vlandev->dev_addr); |
8c979c26 PM |
378 | |
379 | /* vlan address was equal to the old address and is different from | |
380 | * the new address */ | |
381 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
382 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
ccffad25 | 383 | dev_unicast_add(dev, vlandev->dev_addr); |
8c979c26 PM |
384 | |
385 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
386 | } | |
387 | ||
5fb13570 PM |
388 | static void vlan_transfer_features(struct net_device *dev, |
389 | struct net_device *vlandev) | |
390 | { | |
391 | unsigned long old_features = vlandev->features; | |
392 | ||
289c79a4 PM |
393 | vlandev->features &= ~dev->vlan_features; |
394 | vlandev->features |= dev->features & dev->vlan_features; | |
1ae4be22 | 395 | vlandev->gso_max_size = dev->gso_max_size; |
b85daa53 VD |
396 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
397 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
398 | #endif | |
5fb13570 PM |
399 | |
400 | if (old_features != vlandev->features) | |
401 | netdev_features_change(vlandev); | |
402 | } | |
403 | ||
802fb176 PE |
404 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
405 | { | |
406 | switch (event) { | |
407 | case NETDEV_CHANGENAME: | |
408 | vlan_proc_rem_dev(dev); | |
409 | if (vlan_proc_add_dev(dev) < 0) | |
410 | pr_warning("8021q: failed to change proc name for %s\n", | |
411 | dev->name); | |
412 | break; | |
30688a9a PE |
413 | case NETDEV_REGISTER: |
414 | if (vlan_proc_add_dev(dev) < 0) | |
415 | pr_warning("8021q: failed to add proc entry for %s\n", | |
416 | dev->name); | |
417 | break; | |
418 | case NETDEV_UNREGISTER: | |
419 | vlan_proc_rem_dev(dev); | |
420 | break; | |
802fb176 PE |
421 | } |
422 | } | |
423 | ||
2029cc2c PM |
424 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
425 | void *ptr) | |
1da177e4 LT |
426 | { |
427 | struct net_device *dev = ptr; | |
802fb176 | 428 | struct vlan_group *grp; |
1da177e4 LT |
429 | int i, flgs; |
430 | struct net_device *vlandev; | |
29906f6a | 431 | LIST_HEAD(list); |
1da177e4 | 432 | |
81d85346 | 433 | if (is_vlan_dev(dev)) |
802fb176 | 434 | __vlan_device_event(dev, event); |
802fb176 | 435 | |
a9fde260 | 436 | grp = __vlan_find_group(dev); |
1da177e4 LT |
437 | if (!grp) |
438 | goto out; | |
439 | ||
440 | /* It is OK that we do not hold the group lock right now, | |
441 | * as we run under the RTNL lock. | |
442 | */ | |
443 | ||
444 | switch (event) { | |
445 | case NETDEV_CHANGE: | |
446 | /* Propagate real device state to vlan devices */ | |
1da177e4 | 447 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
5c15bdec | 448 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
449 | if (!vlandev) |
450 | continue; | |
451 | ||
ddd7bf9f | 452 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
453 | } |
454 | break; | |
455 | ||
8c979c26 PM |
456 | case NETDEV_CHANGEADDR: |
457 | /* Adjust unicast filters on underlying device */ | |
458 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
459 | vlandev = vlan_group_get_device(grp, i); | |
460 | if (!vlandev) | |
461 | continue; | |
462 | ||
d932e04a PM |
463 | flgs = vlandev->flags; |
464 | if (!(flgs & IFF_UP)) | |
465 | continue; | |
466 | ||
8c979c26 PM |
467 | vlan_sync_address(dev, vlandev); |
468 | } | |
2e477c9b HX |
469 | break; |
470 | ||
471 | case NETDEV_CHANGEMTU: | |
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 | if (vlandev->mtu <= dev->mtu) | |
478 | continue; | |
479 | ||
480 | dev_set_mtu(vlandev, dev->mtu); | |
481 | } | |
8c979c26 PM |
482 | break; |
483 | ||
5fb13570 PM |
484 | case NETDEV_FEAT_CHANGE: |
485 | /* Propagate device features to underlying device */ | |
486 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
487 | vlandev = vlan_group_get_device(grp, i); | |
488 | if (!vlandev) | |
489 | continue; | |
490 | ||
491 | vlan_transfer_features(dev, vlandev); | |
492 | } | |
493 | ||
494 | break; | |
495 | ||
1da177e4 LT |
496 | case NETDEV_DOWN: |
497 | /* Put all VLANs for this dev in the down state too. */ | |
498 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 499 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
500 | if (!vlandev) |
501 | continue; | |
502 | ||
503 | flgs = vlandev->flags; | |
504 | if (!(flgs & IFF_UP)) | |
505 | continue; | |
506 | ||
507 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
adc667e8 | 508 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
509 | } |
510 | break; | |
511 | ||
512 | case NETDEV_UP: | |
513 | /* Put all VLANs for this dev in the up state too. */ | |
514 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
5c15bdec | 515 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
516 | if (!vlandev) |
517 | continue; | |
122952fc | 518 | |
1da177e4 LT |
519 | flgs = vlandev->flags; |
520 | if (flgs & IFF_UP) | |
521 | continue; | |
522 | ||
523 | dev_change_flags(vlandev, flgs | IFF_UP); | |
adc667e8 | 524 | vlan_transfer_operstate(dev, vlandev); |
1da177e4 LT |
525 | } |
526 | break; | |
122952fc | 527 | |
1da177e4 | 528 | case NETDEV_UNREGISTER: |
29906f6a PM |
529 | /* Delete all VLANs for this dev. */ |
530 | grp->killall = 1; | |
531 | ||
532 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
533 | vlandev = vlan_group_get_device(grp, i); | |
534 | if (!vlandev) | |
535 | continue; | |
536 | ||
537 | /* unregistration of last vlan destroys group, abort | |
538 | * afterwards */ | |
539 | if (grp->nr_vlans == 1) | |
540 | i = VLAN_GROUP_ARRAY_LEN; | |
541 | ||
542 | unregister_vlan_dev(vlandev, &list); | |
543 | } | |
544 | unregister_netdevice_many(&list); | |
1da177e4 | 545 | break; |
3ff50b79 | 546 | } |
1da177e4 LT |
547 | |
548 | out: | |
549 | return NOTIFY_DONE; | |
550 | } | |
551 | ||
69ab4b7d PM |
552 | static struct notifier_block vlan_notifier_block __read_mostly = { |
553 | .notifier_call = vlan_device_event, | |
554 | }; | |
555 | ||
1da177e4 LT |
556 | /* |
557 | * VLAN IOCTL handler. | |
558 | * o execute requested action or pass command to the device driver | |
559 | * arg is really a struct vlan_ioctl_args __user *. | |
560 | */ | |
881d966b | 561 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 562 | { |
c17d8874 | 563 | int err; |
1da177e4 | 564 | struct vlan_ioctl_args args; |
c17d8874 | 565 | struct net_device *dev = NULL; |
1da177e4 LT |
566 | |
567 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
568 | return -EFAULT; | |
569 | ||
570 | /* Null terminate this sucker, just in case. */ | |
571 | args.device1[23] = 0; | |
572 | args.u.device2[23] = 0; | |
573 | ||
c17d8874 PM |
574 | rtnl_lock(); |
575 | ||
1da177e4 LT |
576 | switch (args.cmd) { |
577 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
578 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
579 | case SET_VLAN_FLAG_CMD: | |
580 | case ADD_VLAN_CMD: | |
581 | case DEL_VLAN_CMD: | |
582 | case GET_VLAN_REALDEV_NAME_CMD: | |
583 | case GET_VLAN_VID_CMD: | |
584 | err = -ENODEV; | |
65d292a2 | 585 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
586 | if (!dev) |
587 | goto out; | |
588 | ||
589 | err = -EINVAL; | |
26a25239 | 590 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
591 | goto out; |
592 | } | |
593 | ||
594 | switch (args.cmd) { | |
595 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
596 | err = -EPERM; | |
1da177e4 | 597 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
598 | break; |
599 | vlan_dev_set_ingress_priority(dev, | |
600 | args.u.skb_priority, | |
601 | args.vlan_qos); | |
fffe470a | 602 | err = 0; |
1da177e4 LT |
603 | break; |
604 | ||
605 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 606 | err = -EPERM; |
1da177e4 | 607 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
608 | break; |
609 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
610 | args.u.skb_priority, |
611 | args.vlan_qos); | |
612 | break; | |
613 | ||
614 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 615 | err = -EPERM; |
1da177e4 | 616 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 617 | break; |
b3ce0325 PM |
618 | err = vlan_dev_change_flags(dev, |
619 | args.vlan_qos ? args.u.flag : 0, | |
620 | args.u.flag); | |
1da177e4 LT |
621 | break; |
622 | ||
623 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 624 | err = -EPERM; |
1da177e4 | 625 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 626 | break; |
c17d8874 PM |
627 | if ((args.u.name_type >= 0) && |
628 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
629 | struct vlan_net *vn; |
630 | ||
631 | vn = net_generic(net, vlan_net_id); | |
632 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
633 | err = 0; |
634 | } else { | |
635 | err = -EINVAL; | |
636 | } | |
637 | break; | |
638 | ||
639 | case ADD_VLAN_CMD: | |
c17d8874 | 640 | err = -EPERM; |
1da177e4 | 641 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 642 | break; |
2ae0bf69 | 643 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
644 | break; |
645 | ||
646 | case DEL_VLAN_CMD: | |
c17d8874 | 647 | err = -EPERM; |
1da177e4 | 648 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 649 | break; |
23289a37 | 650 | unregister_vlan_dev(dev, NULL); |
af301517 | 651 | err = 0; |
1da177e4 LT |
652 | break; |
653 | ||
1da177e4 | 654 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 655 | err = 0; |
c17d8874 | 656 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 657 | if (copy_to_user(arg, &args, |
2029cc2c | 658 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 659 | err = -EFAULT; |
1da177e4 LT |
660 | break; |
661 | ||
662 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 663 | err = 0; |
22d1ba74 | 664 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 665 | if (copy_to_user(arg, &args, |
2029cc2c | 666 | sizeof(struct vlan_ioctl_args))) |
122952fc | 667 | err = -EFAULT; |
1da177e4 LT |
668 | break; |
669 | ||
670 | default: | |
198a291c | 671 | err = -EOPNOTSUPP; |
c17d8874 | 672 | break; |
3ff50b79 | 673 | } |
7eb1b3d3 | 674 | out: |
c17d8874 | 675 | rtnl_unlock(); |
1da177e4 LT |
676 | return err; |
677 | } | |
678 | ||
d9ed0f0e PE |
679 | static int vlan_init_net(struct net *net) |
680 | { | |
681 | int err; | |
682 | struct vlan_net *vn; | |
683 | ||
684 | err = -ENOMEM; | |
685 | vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL); | |
686 | if (vn == NULL) | |
687 | goto err_alloc; | |
688 | ||
689 | err = net_assign_generic(net, vlan_net_id, vn); | |
690 | if (err < 0) | |
691 | goto err_assign; | |
692 | ||
7a17a2f7 PE |
693 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
694 | ||
cd1c7014 PE |
695 | err = vlan_proc_init(net); |
696 | if (err < 0) | |
697 | goto err_proc; | |
698 | ||
d9ed0f0e PE |
699 | return 0; |
700 | ||
cd1c7014 PE |
701 | err_proc: |
702 | /* nothing */ | |
d9ed0f0e PE |
703 | err_assign: |
704 | kfree(vn); | |
705 | err_alloc: | |
706 | return err; | |
707 | } | |
708 | ||
709 | static void vlan_exit_net(struct net *net) | |
710 | { | |
711 | struct vlan_net *vn; | |
712 | ||
713 | vn = net_generic(net, vlan_net_id); | |
65d292a2 | 714 | rtnl_kill_links(net, &vlan_link_ops); |
cd1c7014 | 715 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
716 | kfree(vn); |
717 | } | |
718 | ||
719 | static struct pernet_operations vlan_net_ops = { | |
720 | .init = vlan_init_net, | |
721 | .exit = vlan_exit_net, | |
722 | }; | |
723 | ||
69ab4b7d PM |
724 | static int __init vlan_proto_init(void) |
725 | { | |
726 | int err; | |
727 | ||
728 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); | |
729 | pr_info("All bugs added by %s\n", vlan_buggyright); | |
730 | ||
d9ed0f0e PE |
731 | err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops); |
732 | if (err < 0) | |
733 | goto err0; | |
734 | ||
69ab4b7d PM |
735 | err = register_netdevice_notifier(&vlan_notifier_block); |
736 | if (err < 0) | |
737 | goto err2; | |
738 | ||
70c03b49 | 739 | err = vlan_gvrp_init(); |
69ab4b7d PM |
740 | if (err < 0) |
741 | goto err3; | |
742 | ||
70c03b49 PM |
743 | err = vlan_netlink_init(); |
744 | if (err < 0) | |
745 | goto err4; | |
746 | ||
69ab4b7d PM |
747 | dev_add_pack(&vlan_packet_type); |
748 | vlan_ioctl_set(vlan_ioctl_handler); | |
749 | return 0; | |
750 | ||
70c03b49 PM |
751 | err4: |
752 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
753 | err3: |
754 | unregister_netdevice_notifier(&vlan_notifier_block); | |
755 | err2: | |
d9ed0f0e PE |
756 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
757 | err0: | |
69ab4b7d PM |
758 | return err; |
759 | } | |
760 | ||
761 | static void __exit vlan_cleanup_module(void) | |
762 | { | |
763 | unsigned int i; | |
764 | ||
765 | vlan_ioctl_set(NULL); | |
766 | vlan_netlink_fini(); | |
767 | ||
768 | unregister_netdevice_notifier(&vlan_notifier_block); | |
769 | ||
770 | dev_remove_pack(&vlan_packet_type); | |
771 | ||
772 | /* This table must be empty if there are no module references left. */ | |
773 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) | |
774 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
775 | ||
d9ed0f0e | 776 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
6e327c11 | 777 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
778 | |
779 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
780 | } |
781 | ||
782 | module_init(vlan_proto_init); | |
783 | module_exit(vlan_cleanup_module); | |
784 | ||
1da177e4 LT |
785 | MODULE_LICENSE("GPL"); |
786 | MODULE_VERSION(DRV_VERSION); |