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); |
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 | |
c835a677 TG |
253 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, |
254 | NET_NAME_UNKNOWN, vlan_setup); | |
5dd8d1e9 | 255 | |
1da177e4 | 256 | if (new_dev == NULL) |
2ae0bf69 | 257 | return -ENOBUFS; |
1da177e4 | 258 | |
65d292a2 | 259 | dev_net_set(new_dev, net); |
1da177e4 LT |
260 | /* need 4 bytes for extra VLAN header info, |
261 | * hope the underlying device can handle it. | |
262 | */ | |
263 | new_dev->mtu = real_dev->mtu; | |
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 | ||
308453aa MM |
293 | /* vlan continues to inherit address of lower device */ |
294 | if (vlan_dev_inherit_address(vlandev, dev)) | |
295 | goto out; | |
296 | ||
8c979c26 PM |
297 | /* vlan address was different from the old address and is equal to |
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_del(dev, vlandev->dev_addr); |
8c979c26 PM |
302 | |
303 | /* vlan address was equal to the old address and is different from | |
304 | * the new address */ | |
53a2b3a1 JP |
305 | if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
306 | !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 307 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 | 308 | |
308453aa | 309 | out: |
07fc67be | 310 | ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); |
8c979c26 PM |
311 | } |
312 | ||
5fb13570 PM |
313 | static void vlan_transfer_features(struct net_device *dev, |
314 | struct net_device *vlandev) | |
315 | { | |
fc0d48b8 VY |
316 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
317 | ||
1ae4be22 | 318 | vlandev->gso_max_size = dev->gso_max_size; |
f6773c5e | 319 | vlandev->gso_max_segs = dev->gso_max_segs; |
029f5fc3 | 320 | |
fc0d48b8 | 321 | if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) |
029f5fc3 JF |
322 | vlandev->hard_header_len = dev->hard_header_len; |
323 | else | |
324 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
325 | ||
f4d5392e | 326 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
327 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
328 | #endif | |
8a0427bb MM |
329 | |
330 | netdev_update_features(vlandev); | |
5fb13570 PM |
331 | } |
332 | ||
9c5ff24f | 333 | static int __vlan_device_event(struct net_device *dev, unsigned long event) |
802fb176 | 334 | { |
9c5ff24f WC |
335 | int err = 0; |
336 | ||
802fb176 PE |
337 | switch (event) { |
338 | case NETDEV_CHANGENAME: | |
339 | vlan_proc_rem_dev(dev); | |
9c5ff24f | 340 | err = vlan_proc_add_dev(dev); |
802fb176 | 341 | break; |
30688a9a | 342 | case NETDEV_REGISTER: |
9c5ff24f | 343 | err = vlan_proc_add_dev(dev); |
30688a9a PE |
344 | break; |
345 | case NETDEV_UNREGISTER: | |
346 | vlan_proc_rem_dev(dev); | |
347 | break; | |
802fb176 | 348 | } |
9c5ff24f WC |
349 | |
350 | return err; | |
802fb176 PE |
351 | } |
352 | ||
2029cc2c PM |
353 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
354 | void *ptr) | |
1da177e4 | 355 | { |
351638e7 | 356 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
802fb176 | 357 | struct vlan_group *grp; |
5b9ea6e0 | 358 | struct vlan_info *vlan_info; |
1da177e4 LT |
359 | int i, flgs; |
360 | struct net_device *vlandev; | |
7da82c06 | 361 | struct vlan_dev_priv *vlan; |
1fd9b1fc | 362 | bool last = false; |
29906f6a | 363 | LIST_HEAD(list); |
1da177e4 | 364 | |
9c5ff24f WC |
365 | if (is_vlan_dev(dev)) { |
366 | int err = __vlan_device_event(dev, event); | |
367 | ||
368 | if (err) | |
369 | return notifier_from_errno(err); | |
370 | } | |
802fb176 | 371 | |
ad1afb00 | 372 | if ((event == NETDEV_UP) && |
f646968f | 373 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { |
afab2d29 | 374 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 | 375 | dev->name); |
80d5c368 | 376 | vlan_vid_add(dev, htons(ETH_P_8021Q), 0); |
ad1afb00 PG |
377 | } |
378 | ||
5b9ea6e0 JP |
379 | vlan_info = rtnl_dereference(dev->vlan_info); |
380 | if (!vlan_info) | |
1da177e4 | 381 | goto out; |
5b9ea6e0 | 382 | grp = &vlan_info->grp; |
1da177e4 LT |
383 | |
384 | /* It is OK that we do not hold the group lock right now, | |
385 | * as we run under the RTNL lock. | |
386 | */ | |
387 | ||
388 | switch (event) { | |
389 | case NETDEV_CHANGE: | |
390 | /* Propagate real device state to vlan devices */ | |
1fd9b1fc | 391 | vlan_group_for_each_dev(grp, i, vlandev) |
fc4a7489 | 392 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
393 | break; |
394 | ||
8c979c26 PM |
395 | case NETDEV_CHANGEADDR: |
396 | /* Adjust unicast filters on underlying device */ | |
1fd9b1fc | 397 | vlan_group_for_each_dev(grp, i, vlandev) { |
d932e04a PM |
398 | flgs = vlandev->flags; |
399 | if (!(flgs & IFF_UP)) | |
400 | continue; | |
401 | ||
8c979c26 PM |
402 | vlan_sync_address(dev, vlandev); |
403 | } | |
2e477c9b HX |
404 | break; |
405 | ||
406 | case NETDEV_CHANGEMTU: | |
1fd9b1fc | 407 | vlan_group_for_each_dev(grp, i, vlandev) { |
2e477c9b HX |
408 | if (vlandev->mtu <= dev->mtu) |
409 | continue; | |
410 | ||
411 | dev_set_mtu(vlandev, dev->mtu); | |
412 | } | |
8c979c26 PM |
413 | break; |
414 | ||
5fb13570 PM |
415 | case NETDEV_FEAT_CHANGE: |
416 | /* Propagate device features to underlying device */ | |
1fd9b1fc | 417 | vlan_group_for_each_dev(grp, i, vlandev) |
5fb13570 | 418 | vlan_transfer_features(dev, vlandev); |
5fb13570 PM |
419 | break; |
420 | ||
99c4a26a DM |
421 | case NETDEV_DOWN: { |
422 | struct net_device *tmp; | |
423 | LIST_HEAD(close_list); | |
424 | ||
f646968f | 425 | if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) |
80d5c368 | 426 | vlan_vid_del(dev, htons(ETH_P_8021Q), 0); |
efc73f4b | 427 | |
1da177e4 | 428 | /* Put all VLANs for this dev in the down 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 | 435 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
99c4a26a DM |
436 | list_add(&vlandev->close_list, &close_list); |
437 | } | |
438 | ||
439 | dev_close_many(&close_list, false); | |
440 | ||
441 | list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { | |
fc4a7489 | 442 | netif_stacked_transfer_operstate(dev, vlandev); |
99c4a26a | 443 | list_del_init(&vlandev->close_list); |
1da177e4 | 444 | } |
99c4a26a | 445 | list_del(&close_list); |
1da177e4 | 446 | break; |
99c4a26a | 447 | } |
1da177e4 LT |
448 | case NETDEV_UP: |
449 | /* Put all VLANs for this dev in the up state too. */ | |
1fd9b1fc | 450 | vlan_group_for_each_dev(grp, i, vlandev) { |
be346ffa | 451 | flgs = dev_get_flags(vlandev); |
1da177e4 LT |
452 | if (flgs & IFF_UP) |
453 | continue; | |
454 | ||
7da82c06 | 455 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
456 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
457 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 458 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
459 | } |
460 | break; | |
122952fc | 461 | |
1da177e4 | 462 | case NETDEV_UNREGISTER: |
3b27e105 DL |
463 | /* twiddle thumbs on netns device moves */ |
464 | if (dev->reg_state != NETREG_UNREGISTERING) | |
465 | break; | |
466 | ||
1fd9b1fc | 467 | vlan_group_for_each_dev(grp, i, vlandev) { |
5b9ea6e0 | 468 | /* removal of last vid destroys vlan_info, abort |
29906f6a | 469 | * afterwards */ |
5b9ea6e0 | 470 | if (vlan_info->nr_vids == 1) |
1fd9b1fc | 471 | last = true; |
29906f6a PM |
472 | |
473 | unregister_vlan_dev(vlandev, &list); | |
1fd9b1fc PM |
474 | if (last) |
475 | break; | |
29906f6a PM |
476 | } |
477 | unregister_netdevice_many(&list); | |
1da177e4 | 478 | break; |
1c01fe14 JP |
479 | |
480 | case NETDEV_PRE_TYPE_CHANGE: | |
481 | /* Forbid underlaying device to change its type. */ | |
18c22a03 JP |
482 | if (vlan_uses_dev(dev)) |
483 | return NOTIFY_BAD; | |
484 | break; | |
99606477 BH |
485 | |
486 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 487 | case NETDEV_BONDING_FAILOVER: |
4aa5dee4 | 488 | case NETDEV_RESEND_IGMP: |
99606477 | 489 | /* Propagate to vlan devices */ |
1fd9b1fc | 490 | vlan_group_for_each_dev(grp, i, vlandev) |
7c899432 | 491 | call_netdevice_notifiers(event, vlandev); |
99606477 | 492 | break; |
3ff50b79 | 493 | } |
1da177e4 LT |
494 | |
495 | out: | |
496 | return NOTIFY_DONE; | |
497 | } | |
498 | ||
69ab4b7d PM |
499 | static struct notifier_block vlan_notifier_block __read_mostly = { |
500 | .notifier_call = vlan_device_event, | |
501 | }; | |
502 | ||
1da177e4 LT |
503 | /* |
504 | * VLAN IOCTL handler. | |
505 | * o execute requested action or pass command to the device driver | |
506 | * arg is really a struct vlan_ioctl_args __user *. | |
507 | */ | |
881d966b | 508 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 509 | { |
c17d8874 | 510 | int err; |
1da177e4 | 511 | struct vlan_ioctl_args args; |
c17d8874 | 512 | struct net_device *dev = NULL; |
1da177e4 LT |
513 | |
514 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
515 | return -EFAULT; | |
516 | ||
517 | /* Null terminate this sucker, just in case. */ | |
518 | args.device1[23] = 0; | |
519 | args.u.device2[23] = 0; | |
520 | ||
c17d8874 PM |
521 | rtnl_lock(); |
522 | ||
1da177e4 LT |
523 | switch (args.cmd) { |
524 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
525 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
526 | case SET_VLAN_FLAG_CMD: | |
527 | case ADD_VLAN_CMD: | |
528 | case DEL_VLAN_CMD: | |
529 | case GET_VLAN_REALDEV_NAME_CMD: | |
530 | case GET_VLAN_VID_CMD: | |
531 | err = -ENODEV; | |
65d292a2 | 532 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
533 | if (!dev) |
534 | goto out; | |
535 | ||
536 | err = -EINVAL; | |
26a25239 | 537 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
538 | goto out; |
539 | } | |
540 | ||
541 | switch (args.cmd) { | |
542 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
543 | err = -EPERM; | |
276996fd | 544 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
545 | break; |
546 | vlan_dev_set_ingress_priority(dev, | |
547 | args.u.skb_priority, | |
548 | args.vlan_qos); | |
fffe470a | 549 | err = 0; |
1da177e4 LT |
550 | break; |
551 | ||
552 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 553 | err = -EPERM; |
276996fd | 554 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
555 | break; |
556 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
557 | args.u.skb_priority, |
558 | args.vlan_qos); | |
559 | break; | |
560 | ||
561 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 562 | err = -EPERM; |
276996fd | 563 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 564 | break; |
b3ce0325 PM |
565 | err = vlan_dev_change_flags(dev, |
566 | args.vlan_qos ? args.u.flag : 0, | |
567 | args.u.flag); | |
1da177e4 LT |
568 | break; |
569 | ||
570 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 571 | err = -EPERM; |
276996fd | 572 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
e35de026 | 573 | break; |
c17d8874 PM |
574 | if ((args.u.name_type >= 0) && |
575 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
576 | struct vlan_net *vn; |
577 | ||
578 | vn = net_generic(net, vlan_net_id); | |
579 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
580 | err = 0; |
581 | } else { | |
582 | err = -EINVAL; | |
583 | } | |
584 | break; | |
585 | ||
586 | case ADD_VLAN_CMD: | |
c17d8874 | 587 | err = -EPERM; |
276996fd | 588 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 589 | break; |
2ae0bf69 | 590 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
591 | break; |
592 | ||
593 | case DEL_VLAN_CMD: | |
c17d8874 | 594 | err = -EPERM; |
276996fd | 595 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 596 | break; |
23289a37 | 597 | unregister_vlan_dev(dev, NULL); |
af301517 | 598 | err = 0; |
1da177e4 LT |
599 | break; |
600 | ||
1da177e4 | 601 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 602 | err = 0; |
c17d8874 | 603 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 604 | if (copy_to_user(arg, &args, |
2029cc2c | 605 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 606 | err = -EFAULT; |
1da177e4 LT |
607 | break; |
608 | ||
609 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 610 | err = 0; |
22d1ba74 | 611 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 612 | if (copy_to_user(arg, &args, |
2029cc2c | 613 | sizeof(struct vlan_ioctl_args))) |
122952fc | 614 | err = -EFAULT; |
1da177e4 LT |
615 | break; |
616 | ||
617 | default: | |
198a291c | 618 | err = -EOPNOTSUPP; |
c17d8874 | 619 | break; |
3ff50b79 | 620 | } |
7eb1b3d3 | 621 | out: |
c17d8874 | 622 | rtnl_unlock(); |
1da177e4 LT |
623 | return err; |
624 | } | |
625 | ||
66e5133f TM |
626 | static struct sk_buff **vlan_gro_receive(struct sk_buff **head, |
627 | struct sk_buff *skb) | |
628 | { | |
629 | struct sk_buff *p, **pp = NULL; | |
630 | struct vlan_hdr *vhdr; | |
631 | unsigned int hlen, off_vlan; | |
632 | const struct packet_offload *ptype; | |
633 | __be16 type; | |
634 | int flush = 1; | |
635 | ||
636 | off_vlan = skb_gro_offset(skb); | |
637 | hlen = off_vlan + sizeof(*vhdr); | |
638 | vhdr = skb_gro_header_fast(skb, off_vlan); | |
639 | if (skb_gro_header_hard(skb, hlen)) { | |
640 | vhdr = skb_gro_header_slow(skb, hlen, off_vlan); | |
641 | if (unlikely(!vhdr)) | |
642 | goto out; | |
643 | } | |
644 | ||
645 | type = vhdr->h_vlan_encapsulated_proto; | |
646 | ||
647 | rcu_read_lock(); | |
648 | ptype = gro_find_receive_by_type(type); | |
649 | if (!ptype) | |
650 | goto out_unlock; | |
651 | ||
652 | flush = 0; | |
653 | ||
654 | for (p = *head; p; p = p->next) { | |
655 | struct vlan_hdr *vhdr2; | |
656 | ||
657 | if (!NAPI_GRO_CB(p)->same_flow) | |
658 | continue; | |
659 | ||
660 | vhdr2 = (struct vlan_hdr *)(p->data + off_vlan); | |
661 | if (compare_vlan_header(vhdr, vhdr2)) | |
662 | NAPI_GRO_CB(p)->same_flow = 0; | |
663 | } | |
664 | ||
665 | skb_gro_pull(skb, sizeof(*vhdr)); | |
666 | skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr)); | |
667 | pp = ptype->callbacks.gro_receive(head, skb); | |
668 | ||
669 | out_unlock: | |
670 | rcu_read_unlock(); | |
671 | out: | |
672 | NAPI_GRO_CB(skb)->flush |= flush; | |
673 | ||
674 | return pp; | |
675 | } | |
676 | ||
677 | static int vlan_gro_complete(struct sk_buff *skb, int nhoff) | |
678 | { | |
679 | struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff); | |
680 | __be16 type = vhdr->h_vlan_encapsulated_proto; | |
681 | struct packet_offload *ptype; | |
682 | int err = -ENOENT; | |
683 | ||
684 | rcu_read_lock(); | |
685 | ptype = gro_find_complete_by_type(type); | |
686 | if (ptype) | |
687 | err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr)); | |
688 | ||
689 | rcu_read_unlock(); | |
690 | return err; | |
691 | } | |
692 | ||
693 | static struct packet_offload vlan_packet_offloads[] __read_mostly = { | |
694 | { | |
695 | .type = cpu_to_be16(ETH_P_8021Q), | |
696 | .priority = 10, | |
697 | .callbacks = { | |
698 | .gro_receive = vlan_gro_receive, | |
699 | .gro_complete = vlan_gro_complete, | |
700 | }, | |
701 | }, | |
702 | { | |
703 | .type = cpu_to_be16(ETH_P_8021AD), | |
704 | .priority = 10, | |
705 | .callbacks = { | |
706 | .gro_receive = vlan_gro_receive, | |
707 | .gro_complete = vlan_gro_complete, | |
708 | }, | |
709 | }, | |
710 | }; | |
711 | ||
2c8c1e72 | 712 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 713 | { |
946d1a92 | 714 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 715 | int err; |
d9ed0f0e | 716 | |
7a17a2f7 PE |
717 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
718 | ||
cd1c7014 | 719 | err = vlan_proc_init(net); |
cd1c7014 | 720 | |
d9ed0f0e PE |
721 | return err; |
722 | } | |
723 | ||
2c8c1e72 | 724 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 725 | { |
cd1c7014 | 726 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
727 | } |
728 | ||
729 | static struct pernet_operations vlan_net_ops = { | |
730 | .init = vlan_init_net, | |
731 | .exit = vlan_exit_net, | |
946d1a92 EB |
732 | .id = &vlan_net_id, |
733 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
734 | }; |
735 | ||
69ab4b7d PM |
736 | static int __init vlan_proto_init(void) |
737 | { | |
738 | int err; | |
66e5133f | 739 | unsigned int i; |
69ab4b7d | 740 | |
da7c06c4 | 741 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 742 | |
91e2ff35 | 743 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
744 | if (err < 0) |
745 | goto err0; | |
746 | ||
69ab4b7d PM |
747 | err = register_netdevice_notifier(&vlan_notifier_block); |
748 | if (err < 0) | |
749 | goto err2; | |
750 | ||
70c03b49 | 751 | err = vlan_gvrp_init(); |
69ab4b7d PM |
752 | if (err < 0) |
753 | goto err3; | |
754 | ||
86fbe9bb | 755 | err = vlan_mvrp_init(); |
70c03b49 PM |
756 | if (err < 0) |
757 | goto err4; | |
758 | ||
86fbe9bb DW |
759 | err = vlan_netlink_init(); |
760 | if (err < 0) | |
761 | goto err5; | |
762 | ||
66e5133f TM |
763 | for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) |
764 | dev_add_offload(&vlan_packet_offloads[i]); | |
765 | ||
69ab4b7d PM |
766 | vlan_ioctl_set(vlan_ioctl_handler); |
767 | return 0; | |
768 | ||
86fbe9bb DW |
769 | err5: |
770 | vlan_mvrp_uninit(); | |
70c03b49 PM |
771 | err4: |
772 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
773 | err3: |
774 | unregister_netdevice_notifier(&vlan_notifier_block); | |
775 | err2: | |
91e2ff35 | 776 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 777 | err0: |
69ab4b7d PM |
778 | return err; |
779 | } | |
780 | ||
781 | static void __exit vlan_cleanup_module(void) | |
782 | { | |
66e5133f TM |
783 | unsigned int i; |
784 | ||
69ab4b7d | 785 | vlan_ioctl_set(NULL); |
66e5133f TM |
786 | |
787 | for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) | |
788 | dev_remove_offload(&vlan_packet_offloads[i]); | |
789 | ||
69ab4b7d PM |
790 | vlan_netlink_fini(); |
791 | ||
792 | unregister_netdevice_notifier(&vlan_notifier_block); | |
793 | ||
91e2ff35 | 794 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 795 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 | 796 | |
86fbe9bb | 797 | vlan_mvrp_uninit(); |
70c03b49 | 798 | vlan_gvrp_uninit(); |
69ab4b7d PM |
799 | } |
800 | ||
801 | module_init(vlan_proto_init); | |
802 | module_exit(vlan_cleanup_module); | |
803 | ||
1da177e4 LT |
804 | MODULE_LICENSE("GPL"); |
805 | MODULE_VERSION(DRV_VERSION); |