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 | ||
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 | ||
9bb8582e | 54 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
67727184 PE |
55 | { |
56 | struct net_device **array; | |
57 | unsigned int size; | |
58 | ||
59 | ASSERT_RTNL(); | |
60 | ||
9bb8582e | 61 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
67727184 PE |
62 | if (array != NULL) |
63 | return 0; | |
64 | ||
65 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
66 | array = kzalloc(size, GFP_KERNEL); | |
67 | if (array == NULL) | |
68 | return -ENOBUFS; | |
69 | ||
9bb8582e | 70 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
67727184 | 71 | return 0; |
42429aae PM |
72 | } |
73 | ||
23289a37 | 74 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 75 | { |
7da82c06 | 76 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
af301517 | 77 | struct net_device *real_dev = vlan->real_dev; |
5b9ea6e0 | 78 | struct vlan_info *vlan_info; |
1da177e4 | 79 | struct vlan_group *grp; |
9bb8582e | 80 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
81 | |
82 | ASSERT_RTNL(); | |
acc5efbc | 83 | |
5b9ea6e0 JP |
84 | vlan_info = rtnl_dereference(real_dev->vlan_info); |
85 | BUG_ON(!vlan_info); | |
86 | ||
87 | grp = &vlan_info->grp; | |
acc5efbc | 88 | |
acc5efbc | 89 | /* Take it out of our own structures, but be sure to interlock with |
ad1afb00 PG |
90 | * HW accelerating devices or SW vlan input packet processing if |
91 | * VLAN is not 0 (leave it there for 802.1p). | |
acc5efbc | 92 | */ |
87002b03 JP |
93 | if (vlan_id) |
94 | vlan_vid_del(real_dev, vlan_id); | |
1da177e4 | 95 | |
5b9ea6e0 | 96 | grp->nr_vlan_devs--; |
acc5efbc | 97 | |
55aee10d ED |
98 | if (vlan->flags & VLAN_FLAG_GVRP) |
99 | vlan_gvrp_request_leave(dev); | |
100 | ||
29906f6a | 101 | vlan_group_set_device(grp, vlan_id, NULL); |
48752e1b ED |
102 | /* Because unregister_netdevice_queue() makes sure at least one rcu |
103 | * grace period is respected before device freeing, | |
104 | * we dont need to call synchronize_net() here. | |
105 | */ | |
23289a37 | 106 | unregister_netdevice_queue(dev, head); |
ce305002 | 107 | |
5b9ea6e0 | 108 | if (grp->nr_vlan_devs == 0) |
70c03b49 PM |
109 | vlan_gvrp_uninit_applicant(real_dev); |
110 | ||
af301517 PM |
111 | /* Get rid of the vlan's reference to real_dev */ |
112 | dev_put(real_dev); | |
1da177e4 LT |
113 | } |
114 | ||
9bb8582e | 115 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
1da177e4 | 116 | { |
656299f7 SH |
117 | const char *name = real_dev->name; |
118 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
40f98e1a | 119 | |
1da177e4 | 120 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
afab2d29 | 121 | pr_info("VLANs not supported on %s\n", name); |
c1d3ee99 | 122 | return -EOPNOTSUPP; |
1da177e4 LT |
123 | } |
124 | ||
1da177e4 | 125 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
656299f7 | 126 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
afab2d29 | 127 | pr_info("Device %s has buggy VLAN hw accel\n", name); |
c1d3ee99 | 128 | return -EOPNOTSUPP; |
1da177e4 LT |
129 | } |
130 | ||
65ac6a5f | 131 | if (vlan_find_dev(real_dev, vlan_id) != NULL) |
c1d3ee99 | 132 | return -EEXIST; |
1da177e4 | 133 | |
c1d3ee99 PM |
134 | return 0; |
135 | } | |
136 | ||
07b5b17e | 137 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 138 | { |
7da82c06 | 139 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
e89fe42c | 140 | struct net_device *real_dev = vlan->real_dev; |
9bb8582e | 141 | u16 vlan_id = vlan->vlan_id; |
5b9ea6e0 JP |
142 | struct vlan_info *vlan_info; |
143 | struct vlan_group *grp; | |
e89fe42c PM |
144 | int err; |
145 | ||
5b9ea6e0 JP |
146 | err = vlan_vid_add(real_dev, vlan_id); |
147 | if (err) | |
148 | return err; | |
149 | ||
150 | vlan_info = rtnl_dereference(real_dev->vlan_info); | |
151 | /* vlan_info should be there now. vlan_vid_add took care of it */ | |
152 | BUG_ON(!vlan_info); | |
153 | ||
154 | grp = &vlan_info->grp; | |
155 | if (grp->nr_vlan_devs == 0) { | |
70c03b49 PM |
156 | err = vlan_gvrp_init_applicant(real_dev); |
157 | if (err < 0) | |
5b9ea6e0 | 158 | goto out_vid_del; |
e89fe42c PM |
159 | } |
160 | ||
67727184 PE |
161 | err = vlan_group_prealloc_vid(grp, vlan_id); |
162 | if (err < 0) | |
70c03b49 | 163 | goto out_uninit_applicant; |
67727184 | 164 | |
e89fe42c PM |
165 | err = register_netdevice(dev); |
166 | if (err < 0) | |
70c03b49 | 167 | goto out_uninit_applicant; |
e89fe42c | 168 | |
7da82c06 | 169 | /* Account for reference in struct vlan_dev_priv */ |
e89fe42c PM |
170 | dev_hold(real_dev); |
171 | ||
fc4a7489 | 172 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
173 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
174 | ||
175 | /* So, got the sucker initialized, now lets place | |
176 | * it into our local structure. | |
177 | */ | |
178 | vlan_group_set_device(grp, vlan_id, dev); | |
5b9ea6e0 | 179 | grp->nr_vlan_devs++; |
e89fe42c | 180 | |
e89fe42c PM |
181 | return 0; |
182 | ||
70c03b49 | 183 | out_uninit_applicant: |
5b9ea6e0 | 184 | if (grp->nr_vlan_devs == 0) |
70c03b49 | 185 | vlan_gvrp_uninit_applicant(real_dev); |
5b9ea6e0 JP |
186 | out_vid_del: |
187 | vlan_vid_del(real_dev, vlan_id); | |
e89fe42c PM |
188 | return err; |
189 | } | |
190 | ||
c1d3ee99 | 191 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 192 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 193 | */ |
9bb8582e | 194 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 195 | { |
c1d3ee99 | 196 | struct net_device *new_dev; |
7a17a2f7 PE |
197 | struct net *net = dev_net(real_dev); |
198 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 199 | char name[IFNAMSIZ]; |
2ae0bf69 | 200 | int err; |
c1d3ee99 | 201 | |
9bb8582e | 202 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 203 | return -ERANGE; |
c1d3ee99 | 204 | |
9bb8582e | 205 | err = vlan_check_real_dev(real_dev, vlan_id); |
2ae0bf69 PM |
206 | if (err < 0) |
207 | return err; | |
c1d3ee99 | 208 | |
1da177e4 | 209 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 210 | switch (vn->name_type) { |
1da177e4 LT |
211 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
212 | /* name will look like: eth1.0005 */ | |
9bb8582e | 213 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
214 | break; |
215 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
216 | /* Put our vlan.VID in the name. | |
217 | * Name will look like: vlan5 | |
218 | */ | |
9bb8582e | 219 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
220 | break; |
221 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
222 | /* Put our vlan.VID in the name. | |
223 | * Name will look like: eth0.5 | |
224 | */ | |
9bb8582e | 225 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
226 | break; |
227 | case VLAN_NAME_TYPE_PLUS_VID: | |
228 | /* Put our vlan.VID in the name. | |
229 | * Name will look like: vlan0005 | |
230 | */ | |
231 | default: | |
9bb8582e | 232 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 233 | } |
122952fc | 234 | |
7da82c06 | 235 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, vlan_setup); |
5dd8d1e9 | 236 | |
1da177e4 | 237 | if (new_dev == NULL) |
2ae0bf69 | 238 | return -ENOBUFS; |
1da177e4 | 239 | |
65d292a2 | 240 | dev_net_set(new_dev, net); |
1da177e4 LT |
241 | /* need 4 bytes for extra VLAN header info, |
242 | * hope the underlying device can handle it. | |
243 | */ | |
244 | new_dev->mtu = real_dev->mtu; | |
6e22ce2c | 245 | new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT); |
1da177e4 | 246 | |
7da82c06 JP |
247 | vlan_dev_priv(new_dev)->vlan_id = vlan_id; |
248 | vlan_dev_priv(new_dev)->real_dev = real_dev; | |
249 | vlan_dev_priv(new_dev)->dent = NULL; | |
250 | vlan_dev_priv(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 251 | |
07b5b17e | 252 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
253 | err = register_vlan_dev(new_dev); |
254 | if (err < 0) | |
e89fe42c | 255 | goto out_free_newdev; |
1da177e4 | 256 | |
2ae0bf69 | 257 | return 0; |
1da177e4 | 258 | |
1da177e4 LT |
259 | out_free_newdev: |
260 | free_netdev(new_dev); | |
2ae0bf69 | 261 | return err; |
1da177e4 LT |
262 | } |
263 | ||
8c979c26 PM |
264 | static void vlan_sync_address(struct net_device *dev, |
265 | struct net_device *vlandev) | |
266 | { | |
7da82c06 | 267 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
8c979c26 PM |
268 | |
269 | /* May be called without an actual change */ | |
53a2b3a1 | 270 | if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) |
8c979c26 PM |
271 | return; |
272 | ||
273 | /* vlan address was different from the old address and is equal to | |
274 | * the new address */ | |
53a2b3a1 JP |
275 | if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
276 | ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 277 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
278 | |
279 | /* vlan address was equal to the old address and is different from | |
280 | * the new address */ | |
53a2b3a1 JP |
281 | if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
282 | !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 283 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 PM |
284 | |
285 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
286 | } | |
287 | ||
5fb13570 PM |
288 | static void vlan_transfer_features(struct net_device *dev, |
289 | struct net_device *vlandev) | |
290 | { | |
1ae4be22 | 291 | vlandev->gso_max_size = dev->gso_max_size; |
029f5fc3 JF |
292 | |
293 | if (dev->features & NETIF_F_HW_VLAN_TX) | |
294 | vlandev->hard_header_len = dev->hard_header_len; | |
295 | else | |
296 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
297 | ||
f4d5392e | 298 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
299 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
300 | #endif | |
8a0427bb MM |
301 | |
302 | netdev_update_features(vlandev); | |
5fb13570 PM |
303 | } |
304 | ||
802fb176 PE |
305 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
306 | { | |
307 | switch (event) { | |
308 | case NETDEV_CHANGENAME: | |
309 | vlan_proc_rem_dev(dev); | |
310 | if (vlan_proc_add_dev(dev) < 0) | |
afab2d29 JP |
311 | pr_warn("failed to change proc name for %s\n", |
312 | dev->name); | |
802fb176 | 313 | break; |
30688a9a PE |
314 | case NETDEV_REGISTER: |
315 | if (vlan_proc_add_dev(dev) < 0) | |
afab2d29 | 316 | pr_warn("failed to add proc entry for %s\n", dev->name); |
30688a9a PE |
317 | break; |
318 | case NETDEV_UNREGISTER: | |
319 | vlan_proc_rem_dev(dev); | |
320 | break; | |
802fb176 PE |
321 | } |
322 | } | |
323 | ||
2029cc2c PM |
324 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
325 | void *ptr) | |
1da177e4 LT |
326 | { |
327 | struct net_device *dev = ptr; | |
802fb176 | 328 | struct vlan_group *grp; |
5b9ea6e0 | 329 | struct vlan_info *vlan_info; |
1da177e4 LT |
330 | int i, flgs; |
331 | struct net_device *vlandev; | |
7da82c06 | 332 | struct vlan_dev_priv *vlan; |
29906f6a | 333 | LIST_HEAD(list); |
1da177e4 | 334 | |
81d85346 | 335 | if (is_vlan_dev(dev)) |
802fb176 | 336 | __vlan_device_event(dev, event); |
802fb176 | 337 | |
ad1afb00 | 338 | if ((event == NETDEV_UP) && |
87002b03 | 339 | (dev->features & NETIF_F_HW_VLAN_FILTER)) { |
afab2d29 | 340 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 | 341 | dev->name); |
87002b03 | 342 | vlan_vid_add(dev, 0); |
ad1afb00 PG |
343 | } |
344 | ||
5b9ea6e0 JP |
345 | vlan_info = rtnl_dereference(dev->vlan_info); |
346 | if (!vlan_info) | |
1da177e4 | 347 | goto out; |
5b9ea6e0 | 348 | grp = &vlan_info->grp; |
1da177e4 LT |
349 | |
350 | /* It is OK that we do not hold the group lock right now, | |
351 | * as we run under the RTNL lock. | |
352 | */ | |
353 | ||
354 | switch (event) { | |
355 | case NETDEV_CHANGE: | |
356 | /* Propagate real device state to vlan devices */ | |
b738127d | 357 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 358 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
359 | if (!vlandev) |
360 | continue; | |
361 | ||
fc4a7489 | 362 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
363 | } |
364 | break; | |
365 | ||
8c979c26 PM |
366 | case NETDEV_CHANGEADDR: |
367 | /* Adjust unicast filters on underlying device */ | |
b738127d | 368 | for (i = 0; i < VLAN_N_VID; i++) { |
8c979c26 PM |
369 | vlandev = vlan_group_get_device(grp, i); |
370 | if (!vlandev) | |
371 | continue; | |
372 | ||
d932e04a PM |
373 | flgs = vlandev->flags; |
374 | if (!(flgs & IFF_UP)) | |
375 | continue; | |
376 | ||
8c979c26 PM |
377 | vlan_sync_address(dev, vlandev); |
378 | } | |
2e477c9b HX |
379 | break; |
380 | ||
381 | case NETDEV_CHANGEMTU: | |
b738127d | 382 | for (i = 0; i < VLAN_N_VID; i++) { |
2e477c9b HX |
383 | vlandev = vlan_group_get_device(grp, i); |
384 | if (!vlandev) | |
385 | continue; | |
386 | ||
387 | if (vlandev->mtu <= dev->mtu) | |
388 | continue; | |
389 | ||
390 | dev_set_mtu(vlandev, dev->mtu); | |
391 | } | |
8c979c26 PM |
392 | break; |
393 | ||
5fb13570 PM |
394 | case NETDEV_FEAT_CHANGE: |
395 | /* Propagate device features to underlying device */ | |
b738127d | 396 | for (i = 0; i < VLAN_N_VID; i++) { |
5fb13570 PM |
397 | vlandev = vlan_group_get_device(grp, i); |
398 | if (!vlandev) | |
399 | continue; | |
400 | ||
401 | vlan_transfer_features(dev, vlandev); | |
402 | } | |
403 | ||
404 | break; | |
405 | ||
1da177e4 | 406 | case NETDEV_DOWN: |
efc73f4b AH |
407 | if (dev->features & NETIF_F_HW_VLAN_FILTER) |
408 | vlan_vid_del(dev, 0); | |
409 | ||
1da177e4 | 410 | /* Put all VLANs for this dev in the down state too. */ |
b738127d | 411 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 412 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
413 | if (!vlandev) |
414 | continue; | |
415 | ||
416 | flgs = vlandev->flags; | |
417 | if (!(flgs & IFF_UP)) | |
418 | continue; | |
419 | ||
7da82c06 | 420 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
421 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
422 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 423 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
424 | } |
425 | break; | |
426 | ||
427 | case NETDEV_UP: | |
428 | /* Put all VLANs for this dev in the up state too. */ | |
b738127d | 429 | for (i = 0; i < VLAN_N_VID; i++) { |
5c15bdec | 430 | vlandev = vlan_group_get_device(grp, i); |
1da177e4 LT |
431 | if (!vlandev) |
432 | continue; | |
122952fc | 433 | |
1da177e4 LT |
434 | flgs = vlandev->flags; |
435 | if (flgs & IFF_UP) | |
436 | continue; | |
437 | ||
7da82c06 | 438 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
439 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
440 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 441 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
442 | } |
443 | break; | |
122952fc | 444 | |
1da177e4 | 445 | case NETDEV_UNREGISTER: |
3b27e105 DL |
446 | /* twiddle thumbs on netns device moves */ |
447 | if (dev->reg_state != NETREG_UNREGISTERING) | |
448 | break; | |
449 | ||
b738127d | 450 | for (i = 0; i < VLAN_N_VID; i++) { |
29906f6a PM |
451 | vlandev = vlan_group_get_device(grp, i); |
452 | if (!vlandev) | |
453 | continue; | |
454 | ||
5b9ea6e0 | 455 | /* removal of last vid destroys vlan_info, abort |
29906f6a | 456 | * afterwards */ |
5b9ea6e0 | 457 | if (vlan_info->nr_vids == 1) |
b738127d | 458 | i = VLAN_N_VID; |
29906f6a PM |
459 | |
460 | unregister_vlan_dev(vlandev, &list); | |
461 | } | |
462 | unregister_netdevice_many(&list); | |
1da177e4 | 463 | break; |
1c01fe14 JP |
464 | |
465 | case NETDEV_PRE_TYPE_CHANGE: | |
466 | /* Forbid underlaying device to change its type. */ | |
18c22a03 JP |
467 | if (vlan_uses_dev(dev)) |
468 | return NOTIFY_BAD; | |
469 | break; | |
99606477 BH |
470 | |
471 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 472 | case NETDEV_BONDING_FAILOVER: |
99606477 BH |
473 | /* Propagate to vlan devices */ |
474 | for (i = 0; i < VLAN_N_VID; i++) { | |
475 | vlandev = vlan_group_get_device(grp, i); | |
476 | if (!vlandev) | |
477 | continue; | |
478 | ||
7c899432 | 479 | call_netdevice_notifiers(event, vlandev); |
99606477 BH |
480 | } |
481 | break; | |
3ff50b79 | 482 | } |
1da177e4 LT |
483 | |
484 | out: | |
485 | return NOTIFY_DONE; | |
486 | } | |
487 | ||
69ab4b7d PM |
488 | static struct notifier_block vlan_notifier_block __read_mostly = { |
489 | .notifier_call = vlan_device_event, | |
490 | }; | |
491 | ||
1da177e4 LT |
492 | /* |
493 | * VLAN IOCTL handler. | |
494 | * o execute requested action or pass command to the device driver | |
495 | * arg is really a struct vlan_ioctl_args __user *. | |
496 | */ | |
881d966b | 497 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 498 | { |
c17d8874 | 499 | int err; |
1da177e4 | 500 | struct vlan_ioctl_args args; |
c17d8874 | 501 | struct net_device *dev = NULL; |
1da177e4 LT |
502 | |
503 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
504 | return -EFAULT; | |
505 | ||
506 | /* Null terminate this sucker, just in case. */ | |
507 | args.device1[23] = 0; | |
508 | args.u.device2[23] = 0; | |
509 | ||
c17d8874 PM |
510 | rtnl_lock(); |
511 | ||
1da177e4 LT |
512 | switch (args.cmd) { |
513 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
514 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
515 | case SET_VLAN_FLAG_CMD: | |
516 | case ADD_VLAN_CMD: | |
517 | case DEL_VLAN_CMD: | |
518 | case GET_VLAN_REALDEV_NAME_CMD: | |
519 | case GET_VLAN_VID_CMD: | |
520 | err = -ENODEV; | |
65d292a2 | 521 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
522 | if (!dev) |
523 | goto out; | |
524 | ||
525 | err = -EINVAL; | |
26a25239 | 526 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
527 | goto out; |
528 | } | |
529 | ||
530 | switch (args.cmd) { | |
531 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
532 | err = -EPERM; | |
276996fd | 533 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
534 | break; |
535 | vlan_dev_set_ingress_priority(dev, | |
536 | args.u.skb_priority, | |
537 | args.vlan_qos); | |
fffe470a | 538 | err = 0; |
1da177e4 LT |
539 | break; |
540 | ||
541 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 542 | err = -EPERM; |
276996fd | 543 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
544 | break; |
545 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
546 | args.u.skb_priority, |
547 | args.vlan_qos); | |
548 | break; | |
549 | ||
550 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 551 | err = -EPERM; |
276996fd | 552 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 553 | break; |
b3ce0325 PM |
554 | err = vlan_dev_change_flags(dev, |
555 | args.vlan_qos ? args.u.flag : 0, | |
556 | args.u.flag); | |
1da177e4 LT |
557 | break; |
558 | ||
559 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 560 | err = -EPERM; |
276996fd | 561 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
e35de026 | 562 | break; |
c17d8874 PM |
563 | if ((args.u.name_type >= 0) && |
564 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
565 | struct vlan_net *vn; |
566 | ||
567 | vn = net_generic(net, vlan_net_id); | |
568 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
569 | err = 0; |
570 | } else { | |
571 | err = -EINVAL; | |
572 | } | |
573 | break; | |
574 | ||
575 | case ADD_VLAN_CMD: | |
c17d8874 | 576 | err = -EPERM; |
276996fd | 577 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 578 | break; |
2ae0bf69 | 579 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
580 | break; |
581 | ||
582 | case DEL_VLAN_CMD: | |
c17d8874 | 583 | err = -EPERM; |
276996fd | 584 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 585 | break; |
23289a37 | 586 | unregister_vlan_dev(dev, NULL); |
af301517 | 587 | err = 0; |
1da177e4 LT |
588 | break; |
589 | ||
1da177e4 | 590 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 591 | err = 0; |
c17d8874 | 592 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 593 | if (copy_to_user(arg, &args, |
2029cc2c | 594 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 595 | err = -EFAULT; |
1da177e4 LT |
596 | break; |
597 | ||
598 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 599 | err = 0; |
22d1ba74 | 600 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 601 | if (copy_to_user(arg, &args, |
2029cc2c | 602 | sizeof(struct vlan_ioctl_args))) |
122952fc | 603 | err = -EFAULT; |
1da177e4 LT |
604 | break; |
605 | ||
606 | default: | |
198a291c | 607 | err = -EOPNOTSUPP; |
c17d8874 | 608 | break; |
3ff50b79 | 609 | } |
7eb1b3d3 | 610 | out: |
c17d8874 | 611 | rtnl_unlock(); |
1da177e4 LT |
612 | return err; |
613 | } | |
614 | ||
2c8c1e72 | 615 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 616 | { |
946d1a92 | 617 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 618 | int err; |
d9ed0f0e | 619 | |
7a17a2f7 PE |
620 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
621 | ||
cd1c7014 | 622 | err = vlan_proc_init(net); |
cd1c7014 | 623 | |
d9ed0f0e PE |
624 | return err; |
625 | } | |
626 | ||
2c8c1e72 | 627 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 628 | { |
cd1c7014 | 629 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
630 | } |
631 | ||
632 | static struct pernet_operations vlan_net_ops = { | |
633 | .init = vlan_init_net, | |
634 | .exit = vlan_exit_net, | |
946d1a92 EB |
635 | .id = &vlan_net_id, |
636 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
637 | }; |
638 | ||
69ab4b7d PM |
639 | static int __init vlan_proto_init(void) |
640 | { | |
641 | int err; | |
642 | ||
da7c06c4 | 643 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 644 | |
91e2ff35 | 645 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
646 | if (err < 0) |
647 | goto err0; | |
648 | ||
69ab4b7d PM |
649 | err = register_netdevice_notifier(&vlan_notifier_block); |
650 | if (err < 0) | |
651 | goto err2; | |
652 | ||
70c03b49 | 653 | err = vlan_gvrp_init(); |
69ab4b7d PM |
654 | if (err < 0) |
655 | goto err3; | |
656 | ||
70c03b49 PM |
657 | err = vlan_netlink_init(); |
658 | if (err < 0) | |
659 | goto err4; | |
660 | ||
69ab4b7d PM |
661 | vlan_ioctl_set(vlan_ioctl_handler); |
662 | return 0; | |
663 | ||
70c03b49 PM |
664 | err4: |
665 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
666 | err3: |
667 | unregister_netdevice_notifier(&vlan_notifier_block); | |
668 | err2: | |
91e2ff35 | 669 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 670 | err0: |
69ab4b7d PM |
671 | return err; |
672 | } | |
673 | ||
674 | static void __exit vlan_cleanup_module(void) | |
675 | { | |
69ab4b7d PM |
676 | vlan_ioctl_set(NULL); |
677 | vlan_netlink_fini(); | |
678 | ||
679 | unregister_netdevice_notifier(&vlan_notifier_block); | |
680 | ||
91e2ff35 | 681 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 682 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 PM |
683 | |
684 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
685 | } |
686 | ||
687 | module_init(vlan_proto_init); | |
688 | module_exit(vlan_cleanup_module); | |
689 | ||
1da177e4 LT |
690 | MODULE_LICENSE("GPL"); |
691 | MODULE_VERSION(DRV_VERSION); |