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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 | ||
afab2d29 JP |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
4fc268d2 | 23 | #include <linux/capability.h> |
1da177e4 LT |
24 | #include <linux/module.h> |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/skbuff.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 | 28 | #include <linux/init.h> |
82524746 | 29 | #include <linux/rculist.h> |
1da177e4 LT |
30 | #include <net/p8022.h> |
31 | #include <net/arp.h> | |
32 | #include <linux/rtnetlink.h> | |
33 | #include <linux/notifier.h> | |
61362766 | 34 | #include <net/rtnetlink.h> |
e9dc8653 | 35 | #include <net/net_namespace.h> |
d9ed0f0e | 36 | #include <net/netns/generic.h> |
61362766 | 37 | #include <asm/uaccess.h> |
1da177e4 LT |
38 | |
39 | #include <linux/if_vlan.h> | |
40 | #include "vlan.h" | |
41 | #include "vlanproc.h" | |
42 | ||
43 | #define DRV_VERSION "1.8" | |
44 | ||
45 | /* Global VLAN variables */ | |
46 | ||
f99189b1 | 47 | int vlan_net_id __read_mostly; |
d9ed0f0e | 48 | |
b3020061 SH |
49 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
50 | const char vlan_version[] = DRV_VERSION; | |
1da177e4 | 51 | |
1da177e4 LT |
52 | /* End of global variables definitions. */ |
53 | ||
5c15bdec DA |
54 | static void vlan_group_free(struct vlan_group *grp) |
55 | { | |
56 | int i; | |
57 | ||
2029cc2c | 58 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
5c15bdec DA |
59 | kfree(grp->vlan_devices_arrays[i]); |
60 | kfree(grp); | |
61 | } | |
62 | ||
a9fde260 | 63 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
42429aae PM |
64 | { |
65 | struct vlan_group *grp; | |
42429aae PM |
66 | |
67 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
68 | if (!grp) | |
69 | return NULL; | |
70 | ||
a9fde260 | 71 | grp->real_dev = real_dev; |
42429aae | 72 | return grp; |
67727184 | 73 | } |
42429aae | 74 | |
9bb8582e | 75 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
67727184 PE |
76 | { |
77 | struct net_device **array; | |
78 | unsigned int size; | |
79 | ||
80 | ASSERT_RTNL(); | |
81 | ||
9bb8582e | 82 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
67727184 PE |
83 | if (array != NULL) |
84 | return 0; | |
85 | ||
86 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
87 | array = kzalloc(size, GFP_KERNEL); | |
88 | if (array == NULL) | |
89 | return -ENOBUFS; | |
90 | ||
9bb8582e | 91 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
67727184 | 92 | return 0; |
42429aae PM |
93 | } |
94 | ||
1da177e4 LT |
95 | static void vlan_rcu_free(struct rcu_head *rcu) |
96 | { | |
5c15bdec | 97 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
1da177e4 LT |
98 | } |
99 | ||
23289a37 | 100 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 101 | { |
7da82c06 | 102 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
af301517 | 103 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 104 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 | 105 | struct vlan_group *grp; |
9bb8582e | 106 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
107 | |
108 | ASSERT_RTNL(); | |
acc5efbc | 109 | |
b616b09a | 110 | grp = rtnl_dereference(real_dev->vlgrp); |
af301517 | 111 | BUG_ON(!grp); |
acc5efbc | 112 | |
acc5efbc | 113 | /* Take it out of our own structures, but be sure to interlock with |
ad1afb00 PG |
114 | * HW accelerating devices or SW vlan input packet processing if |
115 | * VLAN is not 0 (leave it there for 802.1p). | |
acc5efbc | 116 | */ |
ad1afb00 | 117 | if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) |
656299f7 | 118 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
1da177e4 | 119 | |
af301517 | 120 | grp->nr_vlans--; |
acc5efbc | 121 | |
55aee10d ED |
122 | if (vlan->flags & VLAN_FLAG_GVRP) |
123 | vlan_gvrp_request_leave(dev); | |
124 | ||
29906f6a | 125 | vlan_group_set_device(grp, vlan_id, NULL); |
48752e1b ED |
126 | /* Because unregister_netdevice_queue() makes sure at least one rcu |
127 | * grace period is respected before device freeing, | |
128 | * we dont need to call synchronize_net() here. | |
129 | */ | |
23289a37 | 130 | unregister_netdevice_queue(dev, head); |
ce305002 | 131 | |
acc5efbc | 132 | /* If the group is now empty, kill off the group. */ |
af301517 | 133 | if (grp->nr_vlans == 0) { |
70c03b49 PM |
134 | vlan_gvrp_uninit_applicant(real_dev); |
135 | ||
a9b3cd7f | 136 | RCU_INIT_POINTER(real_dev->vlgrp, NULL); |
acc5efbc | 137 | |
acc5efbc PM |
138 | /* Free the group, after all cpu's are done. */ |
139 | call_rcu(&grp->rcu, vlan_rcu_free); | |
1da177e4 LT |
140 | } |
141 | ||
af301517 PM |
142 | /* Get rid of the vlan's reference to real_dev */ |
143 | dev_put(real_dev); | |
1da177e4 LT |
144 | } |
145 | ||
9bb8582e | 146 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 147 | { |
656299f7 SH |
148 | const char *name = real_dev->name; |
149 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 150 | |
1da177e4 | 151 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
afab2d29 | 152 | pr_info("VLANs not supported on %s\n", name); |
c1d3ee99 | 153 | return -EOPNOTSUPP; |
1da177e4 LT |
154 | } |
155 | ||
1da177e4 | 156 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
656299f7 | 157 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
afab2d29 | 158 | pr_info("Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 159 | return -EOPNOTSUPP; |
1da177e4 LT |
160 | } |
161 | ||
65ac6a5f | 162 | if (vlan_find_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 163 | return -EEXIST; |
1da177e4 | 164 | |
c1d3ee99 PM |
165 | return 0; |
166 | } | |
167 | ||
07b5b17e | 168 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 169 | { |
7da82c06 | 170 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
e89fe42c | 171 | struct net_device *real_dev = vlan->real_dev; |
656299f7 | 172 | const struct net_device_ops *ops = real_dev->netdev_ops; |
9bb8582e | 173 | u16 vlan_id = vlan->vlan_id; |
e89fe42c PM |
174 | struct vlan_group *grp, *ngrp = NULL; |
175 | int err; | |
176 | ||
b616b09a | 177 | grp = rtnl_dereference(real_dev->vlgrp); |
e89fe42c | 178 | if (!grp) { |
a9fde260 | 179 | ngrp = grp = vlan_group_alloc(real_dev); |
e89fe42c PM |
180 | if (!grp) |
181 | return -ENOBUFS; | |
70c03b49 PM |
182 | err = vlan_gvrp_init_applicant(real_dev); |
183 | if (err < 0) | |
184 | goto out_free_group; | |
e89fe42c PM |
185 | } |
186 | ||
67727184 PE |
187 | err = vlan_group_prealloc_vid(grp, vlan_id); |
188 | if (err < 0) | |
70c03b49 | 189 | goto out_uninit_applicant; |
67727184 | 190 | |
e89fe42c PM |
191 | err = register_netdevice(dev); |
192 | if (err < 0) | |
70c03b49 | 193 | goto out_uninit_applicant; |
e89fe42c | 194 | |
7da82c06 | 195 | /* Account for reference in struct vlan_dev_priv */ |
e89fe42c PM |
196 | dev_hold(real_dev); |
197 | ||
fc4a7489 | 198 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
199 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
200 | ||
201 | /* So, got the sucker initialized, now lets place | |
202 | * it into our local structure. | |
203 | */ | |
204 | vlan_group_set_device(grp, vlan_id, dev); | |
af301517 PM |
205 | grp->nr_vlans++; |
206 | ||
65ac6a5f | 207 | if (ngrp) { |
65ac6a5f JG |
208 | rcu_assign_pointer(real_dev->vlgrp, ngrp); |
209 | } | |
e89fe42c | 210 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
656299f7 | 211 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
e89fe42c | 212 | |
e89fe42c PM |
213 | return 0; |
214 | ||
70c03b49 PM |
215 | out_uninit_applicant: |
216 | if (ngrp) | |
217 | vlan_gvrp_uninit_applicant(real_dev); | |
e89fe42c | 218 | out_free_group: |
6b863d1d | 219 | if (ngrp) { |
6b863d1d ED |
220 | /* Free the group, after all cpu's are done. */ |
221 | call_rcu(&ngrp->rcu, vlan_rcu_free); | |
222 | } | |
e89fe42c PM |
223 | return err; |
224 | } | |
225 | ||
c1d3ee99 | 226 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 227 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 228 | */ |
9bb8582e | 229 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 230 | { |
c1d3ee99 | 231 | struct net_device *new_dev; |
7a17a2f7 PE |
232 | struct net *net = dev_net(real_dev); |
233 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 234 | char name[IFNAMSIZ]; |
2ae0bf69 | 235 | int err; |
c1d3ee99 | 236 | |
9bb8582e | 237 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 238 | return -ERANGE; |
c1d3ee99 | 239 | |
9bb8582e | 240 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
241 | if (err < 0) |
242 | return err; | |
c1d3ee99 | 243 | |
1da177e4 | 244 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 245 | switch (vn->name_type) { |
1da177e4 LT |
246 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
247 | /* name will look like: eth1.0005 */ | |
9bb8582e | 248 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
249 | break; |
250 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
251 | /* Put our vlan.VID in the name. | |
252 | * Name will look like: vlan5 | |
253 | */ | |
9bb8582e | 254 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
255 | break; |
256 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
257 | /* Put our vlan.VID in the name. | |
258 | * Name will look like: eth0.5 | |
259 | */ | |
9bb8582e | 260 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
261 | break; |
262 | case VLAN_NAME_TYPE_PLUS_VID: | |
263 | /* Put our vlan.VID in the name. | |
264 | * Name will look like: vlan0005 | |
265 | */ | |
266 | default: | |
9bb8582e | 267 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 268 | } |
122952fc | 269 | |
7da82c06 | 270 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, vlan_setup); |
5dd8d1e9 | 271 | |
1da177e4 | 272 | if (new_dev == NULL) |
2ae0bf69 | 273 | return -ENOBUFS; |
1da177e4 | 274 | |
65d292a2 | 275 | dev_net_set(new_dev, net); |
1da177e4 LT |
276 | /* need 4 bytes for extra VLAN header info, |
277 | * hope the underlying device can handle it. | |
278 | */ | |
279 | new_dev->mtu = real_dev->mtu; | |
280 | ||
7da82c06 JP |
281 | vlan_dev_priv(new_dev)->vlan_id = vlan_id; |
282 | vlan_dev_priv(new_dev)->real_dev = real_dev; | |
283 | vlan_dev_priv(new_dev)->dent = NULL; | |
284 | vlan_dev_priv(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 285 | |
07b5b17e | 286 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
287 | err = register_vlan_dev(new_dev); |
288 | if (err < 0) | |
e89fe42c | 289 | goto out_free_newdev; |
1da177e4 | 290 | |
2ae0bf69 | 291 | return 0; |
1da177e4 | 292 | |
1da177e4 LT |
293 | out_free_newdev: |
294 | free_netdev(new_dev); | |
2ae0bf69 | 295 | return err; |
1da177e4 LT |
296 | } |
297 | ||
8c979c26 PM |
298 | static void vlan_sync_address(struct net_device *dev, |
299 | struct net_device *vlandev) | |
300 | { | |
7da82c06 | 301 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
8c979c26 PM |
302 | |
303 | /* May be called without an actual change */ | |
304 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) | |
305 | return; | |
306 | ||
307 | /* vlan address was different from the old address and is equal to | |
308 | * the new address */ | |
309 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
310 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 311 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
312 | |
313 | /* vlan address was equal to the old address and is different from | |
314 | * the new address */ | |
315 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && | |
316 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 317 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 PM |
318 | |
319 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
320 | } | |
321 | ||
5fb13570 PM |
322 | static void vlan_transfer_features(struct net_device *dev, |
323 | struct net_device *vlandev) | |
324 | { | |
1ae4be22 | 325 | vlandev->gso_max_size = dev->gso_max_size; |
029f5fc3 JF |
326 | |
327 | if (dev->features & NETIF_F_HW_VLAN_TX) | |
328 | vlandev->hard_header_len = dev->hard_header_len; | |
329 | else | |
330 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
331 | ||
b85daa53 VD |
332 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
333 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; | |
334 | #endif | |
8a0427bb MM |
335 | |
336 | netdev_update_features(vlandev); | |
5fb13570 PM |
337 | } |
338 | ||
802fb176 PE |
339 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
340 | { | |
341 | switch (event) { | |
342 | case NETDEV_CHANGENAME: | |
343 | vlan_proc_rem_dev(dev); | |
344 | if (vlan_proc_add_dev(dev) < 0) | |
afab2d29 JP |
345 | pr_warn("failed to change proc name for %s\n", |
346 | dev->name); | |
802fb176 | 347 | break; |
30688a9a PE |
348 | case NETDEV_REGISTER: |
349 | if (vlan_proc_add_dev(dev) < 0) | |
afab2d29 | 350 | pr_warn("failed to add proc entry for %s\n", dev->name); |
30688a9a PE |
351 | break; |
352 | case NETDEV_UNREGISTER: | |
353 | vlan_proc_rem_dev(dev); | |
354 | break; | |
802fb176 PE |
355 | } |
356 | } | |
357 | ||
2029cc2c PM |
358 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
359 | void *ptr) | |
1da177e4 LT |
360 | { |
361 | struct net_device *dev = ptr; | |
802fb176 | 362 | struct vlan_group *grp; |
1da177e4 LT |
363 | int i, flgs; |
364 | struct net_device *vlandev; | |
7da82c06 | 365 | struct vlan_dev_priv *vlan; |
29906f6a | 366 | LIST_HEAD(list); |
1da177e4 | 367 | |
81d85346 | 368 | if (is_vlan_dev(dev)) |
802fb176 | 369 | __vlan_device_event(dev, event); |
802fb176 | 370 | |
ad1afb00 PG |
371 | if ((event == NETDEV_UP) && |
372 | (dev->features & NETIF_F_HW_VLAN_FILTER) && | |
373 | dev->netdev_ops->ndo_vlan_rx_add_vid) { | |
afab2d29 | 374 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 PG |
375 | dev->name); |
376 | dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); | |
377 | } | |
378 | ||
b616b09a | 379 | grp = rtnl_dereference(dev->vlgrp); |
1da177e4 LT |
380 | if (!grp) |
381 | goto out; | |
382 | ||
383 | /* It is OK that we do not hold the group lock right now, | |
384 | * as we run under the RTNL lock. | |
385 | */ | |
386 | ||
387 | switch (event) { | |
388 | case NETDEV_CHANGE: | |
389 | /* Propagate real device state to vlan devices */ | |
b738127d | 390 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 391 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
392 | if (!vlandev) |
393 | continue; | |
394 | ||
fc4a7489 | 395 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
396 | } |
397 | break; | |
398 | ||
8c979c26 PM |
399 | case NETDEV_CHANGEADDR: |
400 | /* Adjust unicast filters on underlying device */ | |
b738127d | 401 | for (i = 0; i < VLAN_N_VID; i++) { |
8c979c26 PM |
402 | vlandev = vlan_group_get_device(grp, i); |
403 | if (!vlandev) | |
404 | continue; | |
405 | ||
d932e04a PM |
406 | flgs = vlandev->flags; |
407 | if (!(flgs & IFF_UP)) | |
408 | continue; | |
409 | ||
8c979c26 PM |
410 | vlan_sync_address(dev, vlandev); |
411 | } | |
2e477c9b HX |
412 | break; |
413 | ||
414 | case NETDEV_CHANGEMTU: | |
b738127d | 415 | for (i = 0; i < VLAN_N_VID; i++) { |
2e477c9b HX |
416 | vlandev = vlan_group_get_device(grp, i); |
417 | if (!vlandev) | |
418 | continue; | |
419 | ||
420 | if (vlandev->mtu <= dev->mtu) | |
421 | continue; | |
422 | ||
423 | dev_set_mtu(vlandev, dev->mtu); | |
424 | } | |
8c979c26 PM |
425 | break; |
426 | ||
5fb13570 PM |
427 | case NETDEV_FEAT_CHANGE: |
428 | /* Propagate device features to underlying device */ | |
b738127d | 429 | for (i = 0; i < VLAN_N_VID; i++) { |
5fb13570 PM |
430 | vlandev = vlan_group_get_device(grp, i); |
431 | if (!vlandev) | |
432 | continue; | |
433 | ||
434 | vlan_transfer_features(dev, vlandev); | |
435 | } | |
436 | ||
437 | break; | |
438 | ||
1da177e4 LT |
439 | case NETDEV_DOWN: |
440 | /* Put all VLANs for this dev in the down state too. */ | |
b738127d | 441 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 442 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
443 | if (!vlandev) |
444 | continue; | |
445 | ||
446 | flgs = vlandev->flags; | |
447 | if (!(flgs & IFF_UP)) | |
448 | continue; | |
449 | ||
7da82c06 | 450 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
451 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
452 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 453 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
454 | } |
455 | break; | |
456 | ||
457 | case NETDEV_UP: | |
458 | /* Put all VLANs for this dev in the up state too. */ | |
b738127d | 459 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 460 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
461 | if (!vlandev) |
462 | continue; | |
122952fc | 463 | |
1da177e4 LT |
464 | flgs = vlandev->flags; |
465 | if (flgs & IFF_UP) | |
466 | continue; | |
467 | ||
7da82c06 | 468 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
469 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
470 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 471 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
472 | } |
473 | break; | |
122952fc | 474 | |
1da177e4 | 475 | case NETDEV_UNREGISTER: |
3b27e105 DL |
476 | /* twiddle thumbs on netns device moves */ |
477 | if (dev->reg_state != NETREG_UNREGISTERING) | |
478 | break; | |
479 | ||
b738127d | 480 | for (i = 0; i < VLAN_N_VID; i++) { |
29906f6a PM |
481 | vlandev = vlan_group_get_device(grp, i); |
482 | if (!vlandev) | |
483 | continue; | |
484 | ||
485 | /* unregistration of last vlan destroys group, abort | |
486 | * afterwards */ | |
487 | if (grp->nr_vlans == 1) | |
b738127d | 488 | i = VLAN_N_VID; |
29906f6a PM |
489 | |
490 | unregister_vlan_dev(vlandev, &list); | |
491 | } | |
492 | unregister_netdevice_many(&list); | |
1da177e4 | 493 | break; |
1c01fe14 JP |
494 | |
495 | case NETDEV_PRE_TYPE_CHANGE: | |
496 | /* Forbid underlaying device to change its type. */ | |
497 | return NOTIFY_BAD; | |
99606477 BH |
498 | |
499 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 500 | case NETDEV_BONDING_FAILOVER: |
99606477 BH |
501 | /* Propagate to vlan devices */ |
502 | for (i = 0; i < VLAN_N_VID; i++) { | |
503 | vlandev = vlan_group_get_device(grp, i); | |
504 | if (!vlandev) | |
505 | continue; | |
506 | ||
7c899432 | 507 | call_netdevice_notifiers(event, vlandev); |
99606477 BH |
508 | } |
509 | break; | |
3ff50b79 | 510 | } |
1da177e4 LT |
511 | |
512 | out: | |
513 | return NOTIFY_DONE; | |
514 | } | |
515 | ||
69ab4b7d PM |
516 | static struct notifier_block vlan_notifier_block __read_mostly = { |
517 | .notifier_call = vlan_device_event, | |
518 | }; | |
519 | ||
1da177e4 LT |
520 | /* |
521 | * VLAN IOCTL handler. | |
522 | * o execute requested action or pass command to the device driver | |
523 | * arg is really a struct vlan_ioctl_args __user *. | |
524 | */ | |
881d966b | 525 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 526 | { |
c17d8874 | 527 | int err; |
1da177e4 | 528 | struct vlan_ioctl_args args; |
c17d8874 | 529 | struct net_device *dev = NULL; |
1da177e4 LT |
530 | |
531 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
532 | return -EFAULT; | |
533 | ||
534 | /* Null terminate this sucker, just in case. */ | |
535 | args.device1[23] = 0; | |
536 | args.u.device2[23] = 0; | |
537 | ||
c17d8874 PM |
538 | rtnl_lock(); |
539 | ||
1da177e4 LT |
540 | switch (args.cmd) { |
541 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
542 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
543 | case SET_VLAN_FLAG_CMD: | |
544 | case ADD_VLAN_CMD: | |
545 | case DEL_VLAN_CMD: | |
546 | case GET_VLAN_REALDEV_NAME_CMD: | |
547 | case GET_VLAN_VID_CMD: | |
548 | err = -ENODEV; | |
65d292a2 | 549 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
550 | if (!dev) |
551 | goto out; | |
552 | ||
553 | err = -EINVAL; | |
26a25239 | 554 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
555 | goto out; |
556 | } | |
557 | ||
558 | switch (args.cmd) { | |
559 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
560 | err = -EPERM; | |
1da177e4 | 561 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
562 | break; |
563 | vlan_dev_set_ingress_priority(dev, | |
564 | args.u.skb_priority, | |
565 | args.vlan_qos); | |
fffe470a | 566 | err = 0; |
1da177e4 LT |
567 | break; |
568 | ||
569 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 570 | err = -EPERM; |
1da177e4 | 571 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 PM |
572 | break; |
573 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
574 | args.u.skb_priority, |
575 | args.vlan_qos); | |
576 | break; | |
577 | ||
578 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 579 | err = -EPERM; |
1da177e4 | 580 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 581 | break; |
b3ce0325 PM |
582 | err = vlan_dev_change_flags(dev, |
583 | args.vlan_qos ? args.u.flag : 0, | |
584 | args.u.flag); | |
1da177e4 LT |
585 | break; |
586 | ||
587 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 588 | err = -EPERM; |
1da177e4 | 589 | if (!capable(CAP_NET_ADMIN)) |
e35de026 | 590 | break; |
c17d8874 PM |
591 | if ((args.u.name_type >= 0) && |
592 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
593 | struct vlan_net *vn; |
594 | ||
595 | vn = net_generic(net, vlan_net_id); | |
596 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
597 | err = 0; |
598 | } else { | |
599 | err = -EINVAL; | |
600 | } | |
601 | break; | |
602 | ||
603 | case ADD_VLAN_CMD: | |
c17d8874 | 604 | err = -EPERM; |
1da177e4 | 605 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 606 | break; |
2ae0bf69 | 607 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
608 | break; |
609 | ||
610 | case DEL_VLAN_CMD: | |
c17d8874 | 611 | err = -EPERM; |
1da177e4 | 612 | if (!capable(CAP_NET_ADMIN)) |
c17d8874 | 613 | break; |
23289a37 | 614 | unregister_vlan_dev(dev, NULL); |
af301517 | 615 | err = 0; |
1da177e4 LT |
616 | break; |
617 | ||
1da177e4 | 618 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 619 | err = 0; |
c17d8874 | 620 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 621 | if (copy_to_user(arg, &args, |
2029cc2c | 622 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 623 | err = -EFAULT; |
1da177e4 LT |
624 | break; |
625 | ||
626 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 627 | err = 0; |
22d1ba74 | 628 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 629 | if (copy_to_user(arg, &args, |
2029cc2c | 630 | sizeof(struct vlan_ioctl_args))) |
122952fc | 631 | err = -EFAULT; |
1da177e4 LT |
632 | break; |
633 | ||
634 | default: | |
198a291c | 635 | err = -EOPNOTSUPP; |
c17d8874 | 636 | break; |
3ff50b79 | 637 | } |
7eb1b3d3 | 638 | out: |
c17d8874 | 639 | rtnl_unlock(); |
1da177e4 LT |
640 | return err; |
641 | } | |
642 | ||
2c8c1e72 | 643 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 644 | { |
946d1a92 | 645 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 646 | int err; |
d9ed0f0e | 647 | |
7a17a2f7 PE |
648 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
649 | ||
cd1c7014 | 650 | err = vlan_proc_init(net); |
cd1c7014 | 651 | |
d9ed0f0e PE |
652 | return err; |
653 | } | |
654 | ||
2c8c1e72 | 655 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 656 | { |
cd1c7014 | 657 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
658 | } |
659 | ||
660 | static struct pernet_operations vlan_net_ops = { | |
661 | .init = vlan_init_net, | |
662 | .exit = vlan_exit_net, | |
946d1a92 EB |
663 | .id = &vlan_net_id, |
664 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
665 | }; |
666 | ||
69ab4b7d PM |
667 | static int __init vlan_proto_init(void) |
668 | { | |
669 | int err; | |
670 | ||
da7c06c4 | 671 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 672 | |
91e2ff35 | 673 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
674 | if (err < 0) |
675 | goto err0; | |
676 | ||
69ab4b7d PM |
677 | err = register_netdevice_notifier(&vlan_notifier_block); |
678 | if (err < 0) | |
679 | goto err2; | |
680 | ||
70c03b49 | 681 | err = vlan_gvrp_init(); |
69ab4b7d PM |
682 | if (err < 0) |
683 | goto err3; | |
684 | ||
70c03b49 PM |
685 | err = vlan_netlink_init(); |
686 | if (err < 0) | |
687 | goto err4; | |
688 | ||
69ab4b7d PM |
689 | vlan_ioctl_set(vlan_ioctl_handler); |
690 | return 0; | |
691 | ||
70c03b49 PM |
692 | err4: |
693 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
694 | err3: |
695 | unregister_netdevice_notifier(&vlan_notifier_block); | |
696 | err2: | |
91e2ff35 | 697 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 698 | err0: |
69ab4b7d PM |
699 | return err; |
700 | } | |
701 | ||
702 | static void __exit vlan_cleanup_module(void) | |
703 | { | |
69ab4b7d PM |
704 | vlan_ioctl_set(NULL); |
705 | vlan_netlink_fini(); | |
706 | ||
707 | unregister_netdevice_notifier(&vlan_notifier_block); | |
708 | ||
91e2ff35 | 709 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 710 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
711 | |
712 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
713 | } |
714 | ||
715 | module_init(vlan_proto_init); | |
716 | module_exit(vlan_cleanup_module); | |
717 | ||
1da177e4 LT |
718 | MODULE_LICENSE("GPL"); |
719 | MODULE_VERSION(DRV_VERSION); |