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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 | ||
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); |
47701a36 VF |
101 | |
102 | netdev_upper_dev_unlink(real_dev, dev); | |
48752e1b ED |
103 | /* Because unregister_netdevice_queue() makes sure at least one rcu |
104 | * grace period is respected before device freeing, | |
105 | * we dont need to call synchronize_net() here. | |
106 | */ | |
23289a37 | 107 | unregister_netdevice_queue(dev, head); |
ce305002 | 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 | |
d38569ab | 172 | vlan->nest_level = dev_get_nest_level(real_dev, is_vlan_dev) + 1; |
e89fe42c PM |
173 | err = register_netdevice(dev); |
174 | if (err < 0) | |
5df27e6c VF |
175 | goto out_uninit_mvrp; |
176 | ||
177 | err = netdev_upper_dev_link(real_dev, dev); | |
178 | if (err) | |
179 | goto out_unregister_netdev; | |
e89fe42c | 180 | |
7da82c06 | 181 | /* Account for reference in struct vlan_dev_priv */ |
e89fe42c PM |
182 | dev_hold(real_dev); |
183 | ||
fc4a7489 | 184 | netif_stacked_transfer_operstate(real_dev, dev); |
e89fe42c PM |
185 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
186 | ||
187 | /* So, got the sucker initialized, now lets place | |
188 | * it into our local structure. | |
189 | */ | |
1fd9b1fc | 190 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); |
5b9ea6e0 | 191 | grp->nr_vlan_devs++; |
e89fe42c | 192 | |
e89fe42c PM |
193 | return 0; |
194 | ||
5df27e6c VF |
195 | out_unregister_netdev: |
196 | unregister_netdevice(dev); | |
86fbe9bb DW |
197 | out_uninit_mvrp: |
198 | if (grp->nr_vlan_devs == 0) | |
199 | vlan_mvrp_uninit_applicant(real_dev); | |
200 | out_uninit_gvrp: | |
5b9ea6e0 | 201 | if (grp->nr_vlan_devs == 0) |
70c03b49 | 202 | vlan_gvrp_uninit_applicant(real_dev); |
5b9ea6e0 | 203 | out_vid_del: |
1fd9b1fc | 204 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
e89fe42c PM |
205 | return err; |
206 | } | |
207 | ||
c1d3ee99 | 208 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
2ae0bf69 | 209 | * Returns 0 if the device was created or a negative error code otherwise. |
c1d3ee99 | 210 | */ |
9bb8582e | 211 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
c1d3ee99 | 212 | { |
c1d3ee99 | 213 | struct net_device *new_dev; |
0c0667a8 | 214 | struct vlan_dev_priv *vlan; |
7a17a2f7 PE |
215 | struct net *net = dev_net(real_dev); |
216 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
c1d3ee99 | 217 | char name[IFNAMSIZ]; |
2ae0bf69 | 218 | int err; |
c1d3ee99 | 219 | |
9bb8582e | 220 | if (vlan_id >= VLAN_VID_MASK) |
2ae0bf69 | 221 | return -ERANGE; |
c1d3ee99 | 222 | |
1fd9b1fc | 223 | err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id); |
2ae0bf69 PM |
224 | if (err < 0) |
225 | return err; | |
c1d3ee99 | 226 | |
1da177e4 | 227 | /* Gotta set up the fields for the device. */ |
7a17a2f7 | 228 | switch (vn->name_type) { |
1da177e4 LT |
229 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
230 | /* name will look like: eth1.0005 */ | |
9bb8582e | 231 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
1da177e4 LT |
232 | break; |
233 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
234 | /* Put our vlan.VID in the name. | |
235 | * Name will look like: vlan5 | |
236 | */ | |
9bb8582e | 237 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
1da177e4 LT |
238 | break; |
239 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
240 | /* Put our vlan.VID in the name. | |
241 | * Name will look like: eth0.5 | |
242 | */ | |
9bb8582e | 243 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
1da177e4 LT |
244 | break; |
245 | case VLAN_NAME_TYPE_PLUS_VID: | |
246 | /* Put our vlan.VID in the name. | |
247 | * Name will look like: vlan0005 | |
248 | */ | |
249 | default: | |
9bb8582e | 250 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
3ff50b79 | 251 | } |
122952fc | 252 | |
7da82c06 | 253 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, vlan_setup); |
5dd8d1e9 | 254 | |
1da177e4 | 255 | if (new_dev == NULL) |
2ae0bf69 | 256 | return -ENOBUFS; |
1da177e4 | 257 | |
65d292a2 | 258 | dev_net_set(new_dev, net); |
1da177e4 LT |
259 | /* need 4 bytes for extra VLAN header info, |
260 | * hope the underlying device can handle it. | |
261 | */ | |
262 | new_dev->mtu = real_dev->mtu; | |
6e22ce2c | 263 | new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT); |
1da177e4 | 264 | |
0c0667a8 WSH |
265 | vlan = vlan_dev_priv(new_dev); |
266 | vlan->vlan_proto = htons(ETH_P_8021Q); | |
267 | vlan->vlan_id = vlan_id; | |
268 | vlan->real_dev = real_dev; | |
269 | vlan->dent = NULL; | |
270 | vlan->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 271 | |
07b5b17e | 272 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
273 | err = register_vlan_dev(new_dev); |
274 | if (err < 0) | |
e89fe42c | 275 | goto out_free_newdev; |
1da177e4 | 276 | |
2ae0bf69 | 277 | return 0; |
1da177e4 | 278 | |
1da177e4 LT |
279 | out_free_newdev: |
280 | free_netdev(new_dev); | |
2ae0bf69 | 281 | return err; |
1da177e4 LT |
282 | } |
283 | ||
8c979c26 PM |
284 | static void vlan_sync_address(struct net_device *dev, |
285 | struct net_device *vlandev) | |
286 | { | |
7da82c06 | 287 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
8c979c26 PM |
288 | |
289 | /* May be called without an actual change */ | |
53a2b3a1 | 290 | if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) |
8c979c26 PM |
291 | return; |
292 | ||
293 | /* vlan address was different from the old address and is equal to | |
294 | * the new address */ | |
53a2b3a1 JP |
295 | if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
296 | ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 297 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
298 | |
299 | /* vlan address was equal to the old address and is different from | |
300 | * the new address */ | |
53a2b3a1 JP |
301 | if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
302 | !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 303 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 | 304 | |
07fc67be | 305 | ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); |
8c979c26 PM |
306 | } |
307 | ||
5fb13570 PM |
308 | static void vlan_transfer_features(struct net_device *dev, |
309 | struct net_device *vlandev) | |
310 | { | |
fc0d48b8 VY |
311 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
312 | ||
1ae4be22 | 313 | vlandev->gso_max_size = dev->gso_max_size; |
029f5fc3 | 314 | |
fc0d48b8 | 315 | if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) |
029f5fc3 JF |
316 | vlandev->hard_header_len = dev->hard_header_len; |
317 | else | |
318 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
319 | ||
f4d5392e | 320 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
321 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
322 | #endif | |
8a0427bb MM |
323 | |
324 | netdev_update_features(vlandev); | |
5fb13570 PM |
325 | } |
326 | ||
802fb176 PE |
327 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
328 | { | |
329 | switch (event) { | |
330 | case NETDEV_CHANGENAME: | |
331 | vlan_proc_rem_dev(dev); | |
332 | if (vlan_proc_add_dev(dev) < 0) | |
afab2d29 JP |
333 | pr_warn("failed to change proc name for %s\n", |
334 | dev->name); | |
802fb176 | 335 | break; |
30688a9a PE |
336 | case NETDEV_REGISTER: |
337 | if (vlan_proc_add_dev(dev) < 0) | |
afab2d29 | 338 | pr_warn("failed to add proc entry for %s\n", dev->name); |
30688a9a PE |
339 | break; |
340 | case NETDEV_UNREGISTER: | |
341 | vlan_proc_rem_dev(dev); | |
342 | break; | |
802fb176 PE |
343 | } |
344 | } | |
345 | ||
2029cc2c PM |
346 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
347 | void *ptr) | |
1da177e4 | 348 | { |
351638e7 | 349 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
802fb176 | 350 | struct vlan_group *grp; |
5b9ea6e0 | 351 | struct vlan_info *vlan_info; |
1da177e4 LT |
352 | int i, flgs; |
353 | struct net_device *vlandev; | |
7da82c06 | 354 | struct vlan_dev_priv *vlan; |
1fd9b1fc | 355 | bool last = false; |
29906f6a | 356 | LIST_HEAD(list); |
1da177e4 | 357 | |
81d85346 | 358 | if (is_vlan_dev(dev)) |
802fb176 | 359 | __vlan_device_event(dev, event); |
802fb176 | 360 | |
ad1afb00 | 361 | if ((event == NETDEV_UP) && |
f646968f | 362 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { |
afab2d29 | 363 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 | 364 | dev->name); |
80d5c368 | 365 | vlan_vid_add(dev, htons(ETH_P_8021Q), 0); |
ad1afb00 PG |
366 | } |
367 | ||
5b9ea6e0 JP |
368 | vlan_info = rtnl_dereference(dev->vlan_info); |
369 | if (!vlan_info) | |
1da177e4 | 370 | goto out; |
5b9ea6e0 | 371 | grp = &vlan_info->grp; |
1da177e4 LT |
372 | |
373 | /* It is OK that we do not hold the group lock right now, | |
374 | * as we run under the RTNL lock. | |
375 | */ | |
376 | ||
377 | switch (event) { | |
378 | case NETDEV_CHANGE: | |
379 | /* Propagate real device state to vlan devices */ | |
1fd9b1fc | 380 | vlan_group_for_each_dev(grp, i, vlandev) |
fc4a7489 | 381 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
382 | break; |
383 | ||
8c979c26 PM |
384 | case NETDEV_CHANGEADDR: |
385 | /* Adjust unicast filters on underlying device */ | |
1fd9b1fc | 386 | vlan_group_for_each_dev(grp, i, vlandev) { |
d932e04a PM |
387 | flgs = vlandev->flags; |
388 | if (!(flgs & IFF_UP)) | |
389 | continue; | |
390 | ||
8c979c26 PM |
391 | vlan_sync_address(dev, vlandev); |
392 | } | |
2e477c9b HX |
393 | break; |
394 | ||
395 | case NETDEV_CHANGEMTU: | |
1fd9b1fc | 396 | vlan_group_for_each_dev(grp, i, vlandev) { |
2e477c9b HX |
397 | if (vlandev->mtu <= dev->mtu) |
398 | continue; | |
399 | ||
400 | dev_set_mtu(vlandev, dev->mtu); | |
401 | } | |
8c979c26 PM |
402 | break; |
403 | ||
5fb13570 PM |
404 | case NETDEV_FEAT_CHANGE: |
405 | /* Propagate device features to underlying device */ | |
1fd9b1fc | 406 | vlan_group_for_each_dev(grp, i, vlandev) |
5fb13570 | 407 | vlan_transfer_features(dev, vlandev); |
5fb13570 PM |
408 | break; |
409 | ||
1da177e4 | 410 | case NETDEV_DOWN: |
f646968f | 411 | if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) |
80d5c368 | 412 | vlan_vid_del(dev, htons(ETH_P_8021Q), 0); |
efc73f4b | 413 | |
1da177e4 | 414 | /* Put all VLANs for this dev in the down state too. */ |
1fd9b1fc | 415 | vlan_group_for_each_dev(grp, i, vlandev) { |
1da177e4 LT |
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. */ | |
1fd9b1fc | 429 | vlan_group_for_each_dev(grp, i, vlandev) { |
1da177e4 LT |
430 | flgs = vlandev->flags; |
431 | if (flgs & IFF_UP) | |
432 | continue; | |
433 | ||
7da82c06 | 434 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
435 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
436 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 437 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
438 | } |
439 | break; | |
122952fc | 440 | |
1da177e4 | 441 | case NETDEV_UNREGISTER: |
3b27e105 DL |
442 | /* twiddle thumbs on netns device moves */ |
443 | if (dev->reg_state != NETREG_UNREGISTERING) | |
444 | break; | |
445 | ||
1fd9b1fc | 446 | vlan_group_for_each_dev(grp, i, vlandev) { |
5b9ea6e0 | 447 | /* removal of last vid destroys vlan_info, abort |
29906f6a | 448 | * afterwards */ |
5b9ea6e0 | 449 | if (vlan_info->nr_vids == 1) |
1fd9b1fc | 450 | last = true; |
29906f6a PM |
451 | |
452 | unregister_vlan_dev(vlandev, &list); | |
1fd9b1fc PM |
453 | if (last) |
454 | break; | |
29906f6a PM |
455 | } |
456 | unregister_netdevice_many(&list); | |
1da177e4 | 457 | break; |
1c01fe14 JP |
458 | |
459 | case NETDEV_PRE_TYPE_CHANGE: | |
460 | /* Forbid underlaying device to change its type. */ | |
18c22a03 JP |
461 | if (vlan_uses_dev(dev)) |
462 | return NOTIFY_BAD; | |
463 | break; | |
99606477 BH |
464 | |
465 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 466 | case NETDEV_BONDING_FAILOVER: |
4aa5dee4 | 467 | case NETDEV_RESEND_IGMP: |
99606477 | 468 | /* Propagate to vlan devices */ |
1fd9b1fc | 469 | vlan_group_for_each_dev(grp, i, vlandev) |
7c899432 | 470 | call_netdevice_notifiers(event, vlandev); |
99606477 | 471 | break; |
3ff50b79 | 472 | } |
1da177e4 LT |
473 | |
474 | out: | |
475 | return NOTIFY_DONE; | |
476 | } | |
477 | ||
69ab4b7d PM |
478 | static struct notifier_block vlan_notifier_block __read_mostly = { |
479 | .notifier_call = vlan_device_event, | |
480 | }; | |
481 | ||
1da177e4 LT |
482 | /* |
483 | * VLAN IOCTL handler. | |
484 | * o execute requested action or pass command to the device driver | |
485 | * arg is really a struct vlan_ioctl_args __user *. | |
486 | */ | |
881d966b | 487 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 488 | { |
c17d8874 | 489 | int err; |
1da177e4 | 490 | struct vlan_ioctl_args args; |
c17d8874 | 491 | struct net_device *dev = NULL; |
1da177e4 LT |
492 | |
493 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
494 | return -EFAULT; | |
495 | ||
496 | /* Null terminate this sucker, just in case. */ | |
497 | args.device1[23] = 0; | |
498 | args.u.device2[23] = 0; | |
499 | ||
c17d8874 PM |
500 | rtnl_lock(); |
501 | ||
1da177e4 LT |
502 | switch (args.cmd) { |
503 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
504 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
505 | case SET_VLAN_FLAG_CMD: | |
506 | case ADD_VLAN_CMD: | |
507 | case DEL_VLAN_CMD: | |
508 | case GET_VLAN_REALDEV_NAME_CMD: | |
509 | case GET_VLAN_VID_CMD: | |
510 | err = -ENODEV; | |
65d292a2 | 511 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
512 | if (!dev) |
513 | goto out; | |
514 | ||
515 | err = -EINVAL; | |
26a25239 | 516 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
517 | goto out; |
518 | } | |
519 | ||
520 | switch (args.cmd) { | |
521 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
522 | err = -EPERM; | |
276996fd | 523 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
524 | break; |
525 | vlan_dev_set_ingress_priority(dev, | |
526 | args.u.skb_priority, | |
527 | args.vlan_qos); | |
fffe470a | 528 | err = 0; |
1da177e4 LT |
529 | break; |
530 | ||
531 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 532 | err = -EPERM; |
276996fd | 533 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
534 | break; |
535 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
536 | args.u.skb_priority, |
537 | args.vlan_qos); | |
538 | break; | |
539 | ||
540 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 541 | err = -EPERM; |
276996fd | 542 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 543 | break; |
b3ce0325 PM |
544 | err = vlan_dev_change_flags(dev, |
545 | args.vlan_qos ? args.u.flag : 0, | |
546 | args.u.flag); | |
1da177e4 LT |
547 | break; |
548 | ||
549 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 550 | err = -EPERM; |
276996fd | 551 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
e35de026 | 552 | break; |
c17d8874 PM |
553 | if ((args.u.name_type >= 0) && |
554 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
555 | struct vlan_net *vn; |
556 | ||
557 | vn = net_generic(net, vlan_net_id); | |
558 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
559 | err = 0; |
560 | } else { | |
561 | err = -EINVAL; | |
562 | } | |
563 | break; | |
564 | ||
565 | case ADD_VLAN_CMD: | |
c17d8874 | 566 | err = -EPERM; |
276996fd | 567 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 568 | break; |
2ae0bf69 | 569 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
570 | break; |
571 | ||
572 | case DEL_VLAN_CMD: | |
c17d8874 | 573 | err = -EPERM; |
276996fd | 574 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 575 | break; |
23289a37 | 576 | unregister_vlan_dev(dev, NULL); |
af301517 | 577 | err = 0; |
1da177e4 LT |
578 | break; |
579 | ||
1da177e4 | 580 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 581 | err = 0; |
c17d8874 | 582 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 583 | if (copy_to_user(arg, &args, |
2029cc2c | 584 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 585 | err = -EFAULT; |
1da177e4 LT |
586 | break; |
587 | ||
588 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 589 | err = 0; |
22d1ba74 | 590 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 591 | if (copy_to_user(arg, &args, |
2029cc2c | 592 | sizeof(struct vlan_ioctl_args))) |
122952fc | 593 | err = -EFAULT; |
1da177e4 LT |
594 | break; |
595 | ||
596 | default: | |
198a291c | 597 | err = -EOPNOTSUPP; |
c17d8874 | 598 | break; |
3ff50b79 | 599 | } |
7eb1b3d3 | 600 | out: |
c17d8874 | 601 | rtnl_unlock(); |
1da177e4 LT |
602 | return err; |
603 | } | |
604 | ||
2c8c1e72 | 605 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 606 | { |
946d1a92 | 607 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 608 | int err; |
d9ed0f0e | 609 | |
7a17a2f7 PE |
610 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
611 | ||
cd1c7014 | 612 | err = vlan_proc_init(net); |
cd1c7014 | 613 | |
d9ed0f0e PE |
614 | return err; |
615 | } | |
616 | ||
2c8c1e72 | 617 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 618 | { |
cd1c7014 | 619 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
620 | } |
621 | ||
622 | static struct pernet_operations vlan_net_ops = { | |
623 | .init = vlan_init_net, | |
624 | .exit = vlan_exit_net, | |
946d1a92 EB |
625 | .id = &vlan_net_id, |
626 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
627 | }; |
628 | ||
69ab4b7d PM |
629 | static int __init vlan_proto_init(void) |
630 | { | |
631 | int err; | |
632 | ||
da7c06c4 | 633 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 634 | |
91e2ff35 | 635 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
636 | if (err < 0) |
637 | goto err0; | |
638 | ||
69ab4b7d PM |
639 | err = register_netdevice_notifier(&vlan_notifier_block); |
640 | if (err < 0) | |
641 | goto err2; | |
642 | ||
70c03b49 | 643 | err = vlan_gvrp_init(); |
69ab4b7d PM |
644 | if (err < 0) |
645 | goto err3; | |
646 | ||
86fbe9bb | 647 | err = vlan_mvrp_init(); |
70c03b49 PM |
648 | if (err < 0) |
649 | goto err4; | |
650 | ||
86fbe9bb DW |
651 | err = vlan_netlink_init(); |
652 | if (err < 0) | |
653 | goto err5; | |
654 | ||
69ab4b7d PM |
655 | vlan_ioctl_set(vlan_ioctl_handler); |
656 | return 0; | |
657 | ||
86fbe9bb DW |
658 | err5: |
659 | vlan_mvrp_uninit(); | |
70c03b49 PM |
660 | err4: |
661 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
662 | err3: |
663 | unregister_netdevice_notifier(&vlan_notifier_block); | |
664 | err2: | |
91e2ff35 | 665 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 666 | err0: |
69ab4b7d PM |
667 | return err; |
668 | } | |
669 | ||
670 | static void __exit vlan_cleanup_module(void) | |
671 | { | |
69ab4b7d PM |
672 | vlan_ioctl_set(NULL); |
673 | vlan_netlink_fini(); | |
674 | ||
675 | unregister_netdevice_notifier(&vlan_notifier_block); | |
676 | ||
91e2ff35 | 677 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 678 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 | 679 | |
86fbe9bb | 680 | vlan_mvrp_uninit(); |
70c03b49 | 681 | vlan_gvrp_uninit(); |
69ab4b7d PM |
682 | } |
683 | ||
684 | module_init(vlan_proto_init); | |
685 | module_exit(vlan_cleanup_module); | |
686 | ||
1da177e4 LT |
687 | MODULE_LICENSE("GPL"); |
688 | MODULE_VERSION(DRV_VERSION); |