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 | ||
1fd9b1fc PM |
54 | static int vlan_group_prealloc_vid(struct vlan_group *vg, |
55 | __be16 vlan_proto, u16 vlan_id) | |
67727184 PE |
56 | { |
57 | struct net_device **array; | |
1fd9b1fc | 58 | unsigned int pidx, vidx; |
67727184 PE |
59 | unsigned int size; |
60 | ||
61 | ASSERT_RTNL(); | |
62 | ||
1fd9b1fc PM |
63 | pidx = vlan_proto_idx(vlan_proto); |
64 | vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; | |
65 | array = vg->vlan_devices_arrays[pidx][vidx]; | |
67727184 PE |
66 | if (array != NULL) |
67 | return 0; | |
68 | ||
69 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; | |
70 | array = kzalloc(size, GFP_KERNEL); | |
71 | if (array == NULL) | |
72 | return -ENOBUFS; | |
73 | ||
1fd9b1fc | 74 | vg->vlan_devices_arrays[pidx][vidx] = array; |
67727184 | 75 | return 0; |
42429aae PM |
76 | } |
77 | ||
23289a37 | 78 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
1da177e4 | 79 | { |
7da82c06 | 80 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
af301517 | 81 | struct net_device *real_dev = vlan->real_dev; |
5b9ea6e0 | 82 | struct vlan_info *vlan_info; |
1da177e4 | 83 | struct vlan_group *grp; |
9bb8582e | 84 | u16 vlan_id = vlan->vlan_id; |
1da177e4 LT |
85 | |
86 | ASSERT_RTNL(); | |
acc5efbc | 87 | |
5b9ea6e0 JP |
88 | vlan_info = rtnl_dereference(real_dev->vlan_info); |
89 | BUG_ON(!vlan_info); | |
90 | ||
91 | grp = &vlan_info->grp; | |
acc5efbc | 92 | |
5b9ea6e0 | 93 | grp->nr_vlan_devs--; |
acc5efbc | 94 | |
86fbe9bb DW |
95 | if (vlan->flags & VLAN_FLAG_MVRP) |
96 | vlan_mvrp_request_leave(dev); | |
55aee10d ED |
97 | if (vlan->flags & VLAN_FLAG_GVRP) |
98 | vlan_gvrp_request_leave(dev); | |
99 | ||
1fd9b1fc | 100 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); |
48752e1b ED |
101 | /* Because unregister_netdevice_queue() makes sure at least one rcu |
102 | * grace period is respected before device freeing, | |
103 | * we dont need to call synchronize_net() here. | |
104 | */ | |
23289a37 | 105 | unregister_netdevice_queue(dev, head); |
ce305002 | 106 | |
126d6c23 JP |
107 | netdev_upper_dev_unlink(real_dev, dev); |
108 | ||
86fbe9bb DW |
109 | if (grp->nr_vlan_devs == 0) { |
110 | vlan_mvrp_uninit_applicant(real_dev); | |
70c03b49 | 111 | vlan_gvrp_uninit_applicant(real_dev); |
86fbe9bb | 112 | } |
70c03b49 | 113 | |
4a7df340 CW |
114 | /* Take it out of our own structures, but be sure to interlock with |
115 | * HW accelerating devices or SW vlan input packet processing if | |
116 | * VLAN is not 0 (leave it there for 802.1p). | |
117 | */ | |
118 | if (vlan_id) | |
1fd9b1fc | 119 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
4a7df340 | 120 | |
af301517 PM |
121 | /* Get rid of the vlan's reference to real_dev */ |
122 | dev_put(real_dev); | |
1da177e4 LT |
123 | } |
124 | ||
1fd9b1fc PM |
125 | int vlan_check_real_dev(struct net_device *real_dev, |
126 | __be16 protocol, u16 vlan_id) | |
1da177e4 | 127 | { |
656299f7 | 128 | const char *name = real_dev->name; |
40f98e1a | 129 | |
1da177e4 | 130 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
afab2d29 | 131 | pr_info("VLANs not supported on %s\n", name); |
c1d3ee99 | 132 | return -EOPNOTSUPP; |
1da177e4 LT |
133 | } |
134 | ||
1fd9b1fc | 135 | if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) |
c1d3ee99 | 136 | return -EEXIST; |
1da177e4 | 137 | |
c1d3ee99 PM |
138 | return 0; |
139 | } | |
140 | ||
07b5b17e | 141 | int register_vlan_dev(struct net_device *dev) |
e89fe42c | 142 | { |
7da82c06 | 143 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
e89fe42c | 144 | struct net_device *real_dev = vlan->real_dev; |
9bb8582e | 145 | u16 vlan_id = vlan->vlan_id; |
5b9ea6e0 JP |
146 | struct vlan_info *vlan_info; |
147 | struct vlan_group *grp; | |
e89fe42c PM |
148 | int err; |
149 | ||
1fd9b1fc | 150 | err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); |
5b9ea6e0 JP |
151 | if (err) |
152 | return err; | |
153 | ||
154 | vlan_info = rtnl_dereference(real_dev->vlan_info); | |
155 | /* vlan_info should be there now. vlan_vid_add took care of it */ | |
156 | BUG_ON(!vlan_info); | |
157 | ||
158 | grp = &vlan_info->grp; | |
159 | if (grp->nr_vlan_devs == 0) { | |
70c03b49 PM |
160 | err = vlan_gvrp_init_applicant(real_dev); |
161 | if (err < 0) | |
5b9ea6e0 | 162 | goto out_vid_del; |
86fbe9bb DW |
163 | err = vlan_mvrp_init_applicant(real_dev); |
164 | if (err < 0) | |
165 | goto out_uninit_gvrp; | |
e89fe42c PM |
166 | } |
167 | ||
1fd9b1fc | 168 | err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); |
67727184 | 169 | if (err < 0) |
86fbe9bb | 170 | goto out_uninit_mvrp; |
67727184 | 171 | |
126d6c23 JP |
172 | err = netdev_upper_dev_link(real_dev, dev); |
173 | if (err) | |
86fbe9bb | 174 | goto out_uninit_mvrp; |
126d6c23 | 175 | |
e89fe42c PM |
176 | err = register_netdevice(dev); |
177 | if (err < 0) | |
126d6c23 | 178 | goto out_upper_dev_unlink; |
e89fe42c | 179 | |
7da82c06 | 180 | /* Account for reference in struct vlan_dev_priv */ |
e89fe42c PM |
181 | dev_hold(real_dev); |
182 | ||
fc4a7489 | 183 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
184 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
185 | ||
186 | /* So, got the sucker initialized, now lets place | |
187 | * it into our local structure. | |
188 | */ | |
1fd9b1fc | 189 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); |
5b9ea6e0 | 190 | grp->nr_vlan_devs++; |
e89fe42c | 191 | |
e89fe42c PM |
192 | return 0; |
193 | ||
126d6c23 JP |
194 | out_upper_dev_unlink: |
195 | netdev_upper_dev_unlink(real_dev, dev); | |
86fbe9bb DW |
196 | out_uninit_mvrp: |
197 | if (grp->nr_vlan_devs == 0) | |
198 | vlan_mvrp_uninit_applicant(real_dev); | |
199 | out_uninit_gvrp: | |
5b9ea6e0 | 200 | if (grp->nr_vlan_devs == 0) |
70c03b49 | 201 | vlan_gvrp_uninit_applicant(real_dev); |
5b9ea6e0 | 202 | out_vid_del: |
1fd9b1fc | 203 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
e89fe42c PM |
204 | return err; |
205 | } | |
206 | ||
c1d3ee99 | 207 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 208 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 209 | */ |
9bb8582e | 210 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 211 | { |
c1d3ee99 | 212 | struct net_device *new_dev; |
7a17a2f7 PE |
213 | struct net *net = dev_net(real_dev); |
214 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 215 | char name[IFNAMSIZ]; |
2ae0bf69 | 216 | int err; |
c1d3ee99 | 217 | |
9bb8582e | 218 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 219 | return -ERANGE; |
c1d3ee99 | 220 | |
1fd9b1fc | 221 | err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id); |
2ae0bf69 PM |
222 | if (err < 0) |
223 | return err; | |
c1d3ee99 | 224 | |
1da177e4 | 225 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 226 | switch (vn->name_type) { |
1da177e4 LT |
227 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
228 | /* name will look like: eth1.0005 */ | |
9bb8582e | 229 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
230 | break; |
231 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
232 | /* Put our vlan.VID in the name. | |
233 | * Name will look like: vlan5 | |
234 | */ | |
9bb8582e | 235 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
236 | break; |
237 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
238 | /* Put our vlan.VID in the name. | |
239 | * Name will look like: eth0.5 | |
240 | */ | |
9bb8582e | 241 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
242 | break; |
243 | case VLAN_NAME_TYPE_PLUS_VID: | |
244 | /* Put our vlan.VID in the name. | |
245 | * Name will look like: vlan0005 | |
246 | */ | |
247 | default: | |
9bb8582e | 248 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 249 | } |
122952fc | 250 | |
7da82c06 | 251 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, vlan_setup); |
5dd8d1e9 | 252 | |
1da177e4 | 253 | if (new_dev == NULL) |
2ae0bf69 | 254 | return -ENOBUFS; |
1da177e4 | 255 | |
65d292a2 | 256 | dev_net_set(new_dev, net); |
1da177e4 LT |
257 | /* need 4 bytes for extra VLAN header info, |
258 | * hope the underlying device can handle it. | |
259 | */ | |
260 | new_dev->mtu = real_dev->mtu; | |
6e22ce2c | 261 | new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT); |
1da177e4 | 262 | |
1fd9b1fc | 263 | vlan_dev_priv(new_dev)->vlan_proto = htons(ETH_P_8021Q); |
7da82c06 JP |
264 | vlan_dev_priv(new_dev)->vlan_id = vlan_id; |
265 | vlan_dev_priv(new_dev)->real_dev = real_dev; | |
266 | vlan_dev_priv(new_dev)->dent = NULL; | |
267 | vlan_dev_priv(new_dev)->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 268 | |
07b5b17e | 269 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
270 | err = register_vlan_dev(new_dev); |
271 | if (err < 0) | |
e89fe42c | 272 | goto out_free_newdev; |
1da177e4 | 273 | |
2ae0bf69 | 274 | return 0; |
1da177e4 | 275 | |
1da177e4 | 276 | out_free_newdev: |
61eea275 GF |
277 | if (new_dev->reg_state == NETREG_UNINITIALIZED) |
278 | free_netdev(new_dev); | |
2ae0bf69 | 279 | return err; |
1da177e4 LT |
280 | } |
281 | ||
8c979c26 PM |
282 | static void vlan_sync_address(struct net_device *dev, |
283 | struct net_device *vlandev) | |
284 | { | |
7da82c06 | 285 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
8c979c26 PM |
286 | |
287 | /* May be called without an actual change */ | |
53a2b3a1 | 288 | if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) |
8c979c26 PM |
289 | return; |
290 | ||
291 | /* vlan address was different from the old address and is equal to | |
292 | * the new address */ | |
53a2b3a1 JP |
293 | if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
294 | ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 295 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
296 | |
297 | /* vlan address was equal to the old address and is different from | |
298 | * the new address */ | |
53a2b3a1 JP |
299 | if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
300 | !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 301 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 PM |
302 | |
303 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); | |
304 | } | |
305 | ||
5fb13570 PM |
306 | static void vlan_transfer_features(struct net_device *dev, |
307 | struct net_device *vlandev) | |
308 | { | |
48f77355 VY |
309 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
310 | ||
1ae4be22 | 311 | vlandev->gso_max_size = dev->gso_max_size; |
029f5fc3 | 312 | |
48f77355 | 313 | if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) |
029f5fc3 JF |
314 | vlandev->hard_header_len = dev->hard_header_len; |
315 | else | |
316 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
317 | ||
f4d5392e | 318 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
319 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
320 | #endif | |
8a0427bb MM |
321 | |
322 | netdev_update_features(vlandev); | |
5fb13570 PM |
323 | } |
324 | ||
802fb176 PE |
325 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
326 | { | |
327 | switch (event) { | |
328 | case NETDEV_CHANGENAME: | |
329 | vlan_proc_rem_dev(dev); | |
330 | if (vlan_proc_add_dev(dev) < 0) | |
afab2d29 JP |
331 | pr_warn("failed to change proc name for %s\n", |
332 | dev->name); | |
802fb176 | 333 | break; |
30688a9a PE |
334 | case NETDEV_REGISTER: |
335 | if (vlan_proc_add_dev(dev) < 0) | |
afab2d29 | 336 | pr_warn("failed to add proc entry for %s\n", dev->name); |
30688a9a PE |
337 | break; |
338 | case NETDEV_UNREGISTER: | |
339 | vlan_proc_rem_dev(dev); | |
340 | break; | |
802fb176 PE |
341 | } |
342 | } | |
343 | ||
2029cc2c PM |
344 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
345 | void *ptr) | |
1da177e4 LT |
346 | { |
347 | struct net_device *dev = ptr; | |
802fb176 | 348 | struct vlan_group *grp; |
5b9ea6e0 | 349 | struct vlan_info *vlan_info; |
1da177e4 LT |
350 | int i, flgs; |
351 | struct net_device *vlandev; | |
7da82c06 | 352 | struct vlan_dev_priv *vlan; |
1fd9b1fc | 353 | bool last = false; |
29906f6a | 354 | LIST_HEAD(list); |
1da177e4 | 355 | |
81d85346 | 356 | if (is_vlan_dev(dev)) |
802fb176 | 357 | __vlan_device_event(dev, event); |
802fb176 | 358 | |
ad1afb00 | 359 | if ((event == NETDEV_UP) && |
f646968f | 360 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { |
afab2d29 | 361 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 | 362 | dev->name); |
80d5c368 | 363 | vlan_vid_add(dev, htons(ETH_P_8021Q), 0); |
ad1afb00 PG |
364 | } |
365 | ||
5b9ea6e0 JP |
366 | vlan_info = rtnl_dereference(dev->vlan_info); |
367 | if (!vlan_info) | |
1da177e4 | 368 | goto out; |
5b9ea6e0 | 369 | grp = &vlan_info->grp; |
1da177e4 LT |
370 | |
371 | /* It is OK that we do not hold the group lock right now, | |
372 | * as we run under the RTNL lock. | |
373 | */ | |
374 | ||
375 | switch (event) { | |
376 | case NETDEV_CHANGE: | |
377 | /* Propagate real device state to vlan devices */ | |
1fd9b1fc | 378 | vlan_group_for_each_dev(grp, i, vlandev) |
fc4a7489 | 379 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
380 | break; |
381 | ||
8c979c26 PM |
382 | case NETDEV_CHANGEADDR: |
383 | /* Adjust unicast filters on underlying device */ | |
1fd9b1fc | 384 | vlan_group_for_each_dev(grp, i, vlandev) { |
d932e04a PM |
385 | flgs = vlandev->flags; |
386 | if (!(flgs & IFF_UP)) | |
387 | continue; | |
388 | ||
8c979c26 PM |
389 | vlan_sync_address(dev, vlandev); |
390 | } | |
2e477c9b HX |
391 | break; |
392 | ||
393 | case NETDEV_CHANGEMTU: | |
1fd9b1fc | 394 | vlan_group_for_each_dev(grp, i, vlandev) { |
2e477c9b HX |
395 | if (vlandev->mtu <= dev->mtu) |
396 | continue; | |
397 | ||
398 | dev_set_mtu(vlandev, dev->mtu); | |
399 | } | |
8c979c26 PM |
400 | break; |
401 | ||
5fb13570 PM |
402 | case NETDEV_FEAT_CHANGE: |
403 | /* Propagate device features to underlying device */ | |
1fd9b1fc | 404 | vlan_group_for_each_dev(grp, i, vlandev) |
5fb13570 | 405 | vlan_transfer_features(dev, vlandev); |
5fb13570 PM |
406 | break; |
407 | ||
1da177e4 | 408 | case NETDEV_DOWN: |
f646968f | 409 | if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) |
80d5c368 | 410 | vlan_vid_del(dev, htons(ETH_P_8021Q), 0); |
efc73f4b | 411 | |
1da177e4 | 412 | /* Put all VLANs for this dev in the down state too. */ |
1fd9b1fc | 413 | vlan_group_for_each_dev(grp, i, vlandev) { |
1da177e4 LT |
414 | flgs = vlandev->flags; |
415 | if (!(flgs & IFF_UP)) | |
416 | continue; | |
417 | ||
7da82c06 | 418 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
419 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
420 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
fc4a7489 | 421 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
422 | } |
423 | break; | |
424 | ||
425 | case NETDEV_UP: | |
426 | /* Put all VLANs for this dev in the up state too. */ | |
1fd9b1fc | 427 | vlan_group_for_each_dev(grp, i, vlandev) { |
1da177e4 LT |
428 | flgs = vlandev->flags; |
429 | if (flgs & IFF_UP) | |
430 | continue; | |
431 | ||
7da82c06 | 432 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
433 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
434 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 435 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
436 | } |
437 | break; | |
122952fc | 438 | |
1da177e4 | 439 | case NETDEV_UNREGISTER: |
3b27e105 DL |
440 | /* twiddle thumbs on netns device moves */ |
441 | if (dev->reg_state != NETREG_UNREGISTERING) | |
442 | break; | |
443 | ||
1fd9b1fc | 444 | vlan_group_for_each_dev(grp, i, vlandev) { |
5b9ea6e0 | 445 | /* removal of last vid destroys vlan_info, abort |
29906f6a | 446 | * afterwards */ |
5b9ea6e0 | 447 | if (vlan_info->nr_vids == 1) |
1fd9b1fc | 448 | last = true; |
29906f6a PM |
449 | |
450 | unregister_vlan_dev(vlandev, &list); | |
1fd9b1fc PM |
451 | if (last) |
452 | break; | |
29906f6a PM |
453 | } |
454 | unregister_netdevice_many(&list); | |
1da177e4 | 455 | break; |
1c01fe14 JP |
456 | |
457 | case NETDEV_PRE_TYPE_CHANGE: | |
458 | /* Forbid underlaying device to change its type. */ | |
18c22a03 JP |
459 | if (vlan_uses_dev(dev)) |
460 | return NOTIFY_BAD; | |
461 | break; | |
99606477 BH |
462 | |
463 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 464 | case NETDEV_BONDING_FAILOVER: |
99606477 | 465 | /* Propagate to vlan devices */ |
1fd9b1fc | 466 | vlan_group_for_each_dev(grp, i, vlandev) |
7c899432 | 467 | call_netdevice_notifiers(event, vlandev); |
99606477 | 468 | break; |
3ff50b79 | 469 | } |
1da177e4 LT |
470 | |
471 | out: | |
472 | return NOTIFY_DONE; | |
473 | } | |
474 | ||
69ab4b7d PM |
475 | static struct notifier_block vlan_notifier_block __read_mostly = { |
476 | .notifier_call = vlan_device_event, | |
477 | }; | |
478 | ||
1da177e4 LT |
479 | /* |
480 | * VLAN IOCTL handler. | |
481 | * o execute requested action or pass command to the device driver | |
482 | * arg is really a struct vlan_ioctl_args __user *. | |
483 | */ | |
881d966b | 484 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 485 | { |
c17d8874 | 486 | int err; |
1da177e4 | 487 | struct vlan_ioctl_args args; |
c17d8874 | 488 | struct net_device *dev = NULL; |
1da177e4 LT |
489 | |
490 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
491 | return -EFAULT; | |
492 | ||
493 | /* Null terminate this sucker, just in case. */ | |
494 | args.device1[23] = 0; | |
495 | args.u.device2[23] = 0; | |
496 | ||
c17d8874 PM |
497 | rtnl_lock(); |
498 | ||
1da177e4 LT |
499 | switch (args.cmd) { |
500 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
501 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
502 | case SET_VLAN_FLAG_CMD: | |
503 | case ADD_VLAN_CMD: | |
504 | case DEL_VLAN_CMD: | |
505 | case GET_VLAN_REALDEV_NAME_CMD: | |
506 | case GET_VLAN_VID_CMD: | |
507 | err = -ENODEV; | |
65d292a2 | 508 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
509 | if (!dev) |
510 | goto out; | |
511 | ||
512 | err = -EINVAL; | |
26a25239 | 513 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
514 | goto out; |
515 | } | |
516 | ||
517 | switch (args.cmd) { | |
518 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
519 | err = -EPERM; | |
276996fd | 520 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
521 | break; |
522 | vlan_dev_set_ingress_priority(dev, | |
523 | args.u.skb_priority, | |
524 | args.vlan_qos); | |
fffe470a | 525 | err = 0; |
1da177e4 LT |
526 | break; |
527 | ||
528 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 529 | err = -EPERM; |
276996fd | 530 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
531 | break; |
532 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
533 | args.u.skb_priority, |
534 | args.vlan_qos); | |
535 | break; | |
536 | ||
537 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 538 | err = -EPERM; |
276996fd | 539 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 540 | break; |
b3ce0325 PM |
541 | err = vlan_dev_change_flags(dev, |
542 | args.vlan_qos ? args.u.flag : 0, | |
543 | args.u.flag); | |
1da177e4 LT |
544 | break; |
545 | ||
546 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 547 | err = -EPERM; |
276996fd | 548 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
e35de026 | 549 | break; |
c17d8874 PM |
550 | if ((args.u.name_type >= 0) && |
551 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
552 | struct vlan_net *vn; |
553 | ||
554 | vn = net_generic(net, vlan_net_id); | |
555 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
556 | err = 0; |
557 | } else { | |
558 | err = -EINVAL; | |
559 | } | |
560 | break; | |
561 | ||
562 | case ADD_VLAN_CMD: | |
c17d8874 | 563 | err = -EPERM; |
276996fd | 564 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 565 | break; |
2ae0bf69 | 566 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
567 | break; |
568 | ||
569 | case DEL_VLAN_CMD: | |
c17d8874 | 570 | err = -EPERM; |
276996fd | 571 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 572 | break; |
23289a37 | 573 | unregister_vlan_dev(dev, NULL); |
af301517 | 574 | err = 0; |
1da177e4 LT |
575 | break; |
576 | ||
1da177e4 | 577 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 578 | err = 0; |
c17d8874 | 579 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 580 | if (copy_to_user(arg, &args, |
2029cc2c | 581 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 582 | err = -EFAULT; |
1da177e4 LT |
583 | break; |
584 | ||
585 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 586 | err = 0; |
22d1ba74 | 587 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 588 | if (copy_to_user(arg, &args, |
2029cc2c | 589 | sizeof(struct vlan_ioctl_args))) |
122952fc | 590 | err = -EFAULT; |
1da177e4 LT |
591 | break; |
592 | ||
593 | default: | |
198a291c | 594 | err = -EOPNOTSUPP; |
c17d8874 | 595 | break; |
3ff50b79 | 596 | } |
7eb1b3d3 | 597 | out: |
c17d8874 | 598 | rtnl_unlock(); |
1da177e4 LT |
599 | return err; |
600 | } | |
601 | ||
2c8c1e72 | 602 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 603 | { |
946d1a92 | 604 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 605 | int err; |
d9ed0f0e | 606 | |
7a17a2f7 PE |
607 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
608 | ||
cd1c7014 | 609 | err = vlan_proc_init(net); |
cd1c7014 | 610 | |
d9ed0f0e PE |
611 | return err; |
612 | } | |
613 | ||
2c8c1e72 | 614 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 615 | { |
cd1c7014 | 616 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
617 | } |
618 | ||
619 | static struct pernet_operations vlan_net_ops = { | |
620 | .init = vlan_init_net, | |
621 | .exit = vlan_exit_net, | |
946d1a92 EB |
622 | .id = &vlan_net_id, |
623 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
624 | }; |
625 | ||
69ab4b7d PM |
626 | static int __init vlan_proto_init(void) |
627 | { | |
628 | int err; | |
629 | ||
da7c06c4 | 630 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 631 | |
91e2ff35 | 632 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
633 | if (err < 0) |
634 | goto err0; | |
635 | ||
69ab4b7d PM |
636 | err = register_netdevice_notifier(&vlan_notifier_block); |
637 | if (err < 0) | |
638 | goto err2; | |
639 | ||
70c03b49 | 640 | err = vlan_gvrp_init(); |
69ab4b7d PM |
641 | if (err < 0) |
642 | goto err3; | |
643 | ||
86fbe9bb | 644 | err = vlan_mvrp_init(); |
70c03b49 PM |
645 | if (err < 0) |
646 | goto err4; | |
647 | ||
86fbe9bb DW |
648 | err = vlan_netlink_init(); |
649 | if (err < 0) | |
650 | goto err5; | |
651 | ||
69ab4b7d PM |
652 | vlan_ioctl_set(vlan_ioctl_handler); |
653 | return 0; | |
654 | ||
86fbe9bb DW |
655 | err5: |
656 | vlan_mvrp_uninit(); | |
70c03b49 PM |
657 | err4: |
658 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
659 | err3: |
660 | unregister_netdevice_notifier(&vlan_notifier_block); | |
661 | err2: | |
91e2ff35 | 662 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 663 | err0: |
69ab4b7d PM |
664 | return err; |
665 | } | |
666 | ||
667 | static void __exit vlan_cleanup_module(void) | |
668 | { | |
69ab4b7d PM |
669 | vlan_ioctl_set(NULL); |
670 | vlan_netlink_fini(); | |
671 | ||
672 | unregister_netdevice_notifier(&vlan_notifier_block); | |
673 | ||
91e2ff35 | 674 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 675 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 | 676 | |
86fbe9bb | 677 | vlan_mvrp_uninit(); |
70c03b49 | 678 | vlan_gvrp_uninit(); |
69ab4b7d PM |
679 | } |
680 | ||
681 | module_init(vlan_proto_init); | |
682 | module_exit(vlan_cleanup_module); | |
683 | ||
1da177e4 LT |
684 | MODULE_LICENSE("GPL"); |
685 | MODULE_VERSION(DRV_VERSION); |