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; | |
6e22ce2c | 264 | new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT); |
1da177e4 | 265 | |
0c0667a8 WSH |
266 | vlan = vlan_dev_priv(new_dev); |
267 | vlan->vlan_proto = htons(ETH_P_8021Q); | |
268 | vlan->vlan_id = vlan_id; | |
269 | vlan->real_dev = real_dev; | |
270 | vlan->dent = NULL; | |
271 | vlan->flags = VLAN_FLAG_REORDER_HDR; | |
1da177e4 | 272 | |
07b5b17e | 273 | new_dev->rtnl_link_ops = &vlan_link_ops; |
2ae0bf69 PM |
274 | err = register_vlan_dev(new_dev); |
275 | if (err < 0) | |
e89fe42c | 276 | goto out_free_newdev; |
1da177e4 | 277 | |
2ae0bf69 | 278 | return 0; |
1da177e4 | 279 | |
1da177e4 LT |
280 | out_free_newdev: |
281 | free_netdev(new_dev); | |
2ae0bf69 | 282 | return err; |
1da177e4 LT |
283 | } |
284 | ||
8c979c26 PM |
285 | static void vlan_sync_address(struct net_device *dev, |
286 | struct net_device *vlandev) | |
287 | { | |
7da82c06 | 288 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
8c979c26 PM |
289 | |
290 | /* May be called without an actual change */ | |
53a2b3a1 | 291 | if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) |
8c979c26 PM |
292 | return; |
293 | ||
294 | /* vlan address was different from the old address and is equal to | |
295 | * the new address */ | |
53a2b3a1 JP |
296 | if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
297 | ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 298 | dev_uc_del(dev, vlandev->dev_addr); |
8c979c26 PM |
299 | |
300 | /* vlan address was equal to the old address and is different from | |
301 | * the new address */ | |
53a2b3a1 JP |
302 | if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
303 | !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) | |
a748ee24 | 304 | dev_uc_add(dev, vlandev->dev_addr); |
8c979c26 | 305 | |
07fc67be | 306 | ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); |
8c979c26 PM |
307 | } |
308 | ||
5fb13570 PM |
309 | static void vlan_transfer_features(struct net_device *dev, |
310 | struct net_device *vlandev) | |
311 | { | |
fc0d48b8 VY |
312 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
313 | ||
1ae4be22 | 314 | vlandev->gso_max_size = dev->gso_max_size; |
029f5fc3 | 315 | |
fc0d48b8 | 316 | if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) |
029f5fc3 JF |
317 | vlandev->hard_header_len = dev->hard_header_len; |
318 | else | |
319 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; | |
320 | ||
f4d5392e | 321 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
322 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
323 | #endif | |
8a0427bb MM |
324 | |
325 | netdev_update_features(vlandev); | |
5fb13570 PM |
326 | } |
327 | ||
9c5ff24f | 328 | static int __vlan_device_event(struct net_device *dev, unsigned long event) |
802fb176 | 329 | { |
9c5ff24f WC |
330 | int err = 0; |
331 | ||
802fb176 PE |
332 | switch (event) { |
333 | case NETDEV_CHANGENAME: | |
334 | vlan_proc_rem_dev(dev); | |
9c5ff24f | 335 | err = vlan_proc_add_dev(dev); |
802fb176 | 336 | break; |
30688a9a | 337 | case NETDEV_REGISTER: |
9c5ff24f | 338 | err = vlan_proc_add_dev(dev); |
30688a9a PE |
339 | break; |
340 | case NETDEV_UNREGISTER: | |
341 | vlan_proc_rem_dev(dev); | |
342 | break; | |
802fb176 | 343 | } |
9c5ff24f WC |
344 | |
345 | return err; | |
802fb176 PE |
346 | } |
347 | ||
2029cc2c PM |
348 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
349 | void *ptr) | |
1da177e4 | 350 | { |
351638e7 | 351 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
802fb176 | 352 | struct vlan_group *grp; |
5b9ea6e0 | 353 | struct vlan_info *vlan_info; |
1da177e4 LT |
354 | int i, flgs; |
355 | struct net_device *vlandev; | |
7da82c06 | 356 | struct vlan_dev_priv *vlan; |
1fd9b1fc | 357 | bool last = false; |
29906f6a | 358 | LIST_HEAD(list); |
1da177e4 | 359 | |
9c5ff24f WC |
360 | if (is_vlan_dev(dev)) { |
361 | int err = __vlan_device_event(dev, event); | |
362 | ||
363 | if (err) | |
364 | return notifier_from_errno(err); | |
365 | } | |
802fb176 | 366 | |
ad1afb00 | 367 | if ((event == NETDEV_UP) && |
f646968f | 368 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { |
afab2d29 | 369 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
ad1afb00 | 370 | dev->name); |
80d5c368 | 371 | vlan_vid_add(dev, htons(ETH_P_8021Q), 0); |
ad1afb00 PG |
372 | } |
373 | ||
5b9ea6e0 JP |
374 | vlan_info = rtnl_dereference(dev->vlan_info); |
375 | if (!vlan_info) | |
1da177e4 | 376 | goto out; |
5b9ea6e0 | 377 | grp = &vlan_info->grp; |
1da177e4 LT |
378 | |
379 | /* It is OK that we do not hold the group lock right now, | |
380 | * as we run under the RTNL lock. | |
381 | */ | |
382 | ||
383 | switch (event) { | |
384 | case NETDEV_CHANGE: | |
385 | /* Propagate real device state to vlan devices */ | |
1fd9b1fc | 386 | vlan_group_for_each_dev(grp, i, vlandev) |
fc4a7489 | 387 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
388 | break; |
389 | ||
8c979c26 PM |
390 | case NETDEV_CHANGEADDR: |
391 | /* Adjust unicast filters on underlying device */ | |
1fd9b1fc | 392 | vlan_group_for_each_dev(grp, i, vlandev) { |
d932e04a PM |
393 | flgs = vlandev->flags; |
394 | if (!(flgs & IFF_UP)) | |
395 | continue; | |
396 | ||
8c979c26 PM |
397 | vlan_sync_address(dev, vlandev); |
398 | } | |
2e477c9b HX |
399 | break; |
400 | ||
401 | case NETDEV_CHANGEMTU: | |
1fd9b1fc | 402 | vlan_group_for_each_dev(grp, i, vlandev) { |
2e477c9b HX |
403 | if (vlandev->mtu <= dev->mtu) |
404 | continue; | |
405 | ||
406 | dev_set_mtu(vlandev, dev->mtu); | |
407 | } | |
8c979c26 PM |
408 | break; |
409 | ||
5fb13570 PM |
410 | case NETDEV_FEAT_CHANGE: |
411 | /* Propagate device features to underlying device */ | |
1fd9b1fc | 412 | vlan_group_for_each_dev(grp, i, vlandev) |
5fb13570 | 413 | vlan_transfer_features(dev, vlandev); |
5fb13570 PM |
414 | break; |
415 | ||
99c4a26a DM |
416 | case NETDEV_DOWN: { |
417 | struct net_device *tmp; | |
418 | LIST_HEAD(close_list); | |
419 | ||
f646968f | 420 | if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) |
80d5c368 | 421 | vlan_vid_del(dev, htons(ETH_P_8021Q), 0); |
efc73f4b | 422 | |
1da177e4 | 423 | /* Put all VLANs for this dev in the down state too. */ |
1fd9b1fc | 424 | vlan_group_for_each_dev(grp, i, vlandev) { |
1da177e4 LT |
425 | flgs = vlandev->flags; |
426 | if (!(flgs & IFF_UP)) | |
427 | continue; | |
428 | ||
7da82c06 | 429 | vlan = vlan_dev_priv(vlandev); |
5e756593 | 430 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
99c4a26a DM |
431 | list_add(&vlandev->close_list, &close_list); |
432 | } | |
433 | ||
434 | dev_close_many(&close_list, false); | |
435 | ||
436 | list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { | |
fc4a7489 | 437 | netif_stacked_transfer_operstate(dev, vlandev); |
99c4a26a | 438 | list_del_init(&vlandev->close_list); |
1da177e4 | 439 | } |
99c4a26a | 440 | list_del(&close_list); |
1da177e4 | 441 | break; |
99c4a26a | 442 | } |
1da177e4 LT |
443 | case NETDEV_UP: |
444 | /* Put all VLANs for this dev in the up state too. */ | |
1fd9b1fc | 445 | vlan_group_for_each_dev(grp, i, vlandev) { |
be346ffa | 446 | flgs = dev_get_flags(vlandev); |
1da177e4 LT |
447 | if (flgs & IFF_UP) |
448 | continue; | |
449 | ||
7da82c06 | 450 | vlan = vlan_dev_priv(vlandev); |
5e756593 PM |
451 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
452 | dev_change_flags(vlandev, flgs | IFF_UP); | |
fc4a7489 | 453 | netif_stacked_transfer_operstate(dev, vlandev); |
1da177e4 LT |
454 | } |
455 | break; | |
122952fc | 456 | |
1da177e4 | 457 | case NETDEV_UNREGISTER: |
3b27e105 DL |
458 | /* twiddle thumbs on netns device moves */ |
459 | if (dev->reg_state != NETREG_UNREGISTERING) | |
460 | break; | |
461 | ||
1fd9b1fc | 462 | vlan_group_for_each_dev(grp, i, vlandev) { |
5b9ea6e0 | 463 | /* removal of last vid destroys vlan_info, abort |
29906f6a | 464 | * afterwards */ |
5b9ea6e0 | 465 | if (vlan_info->nr_vids == 1) |
1fd9b1fc | 466 | last = true; |
29906f6a PM |
467 | |
468 | unregister_vlan_dev(vlandev, &list); | |
1fd9b1fc PM |
469 | if (last) |
470 | break; | |
29906f6a PM |
471 | } |
472 | unregister_netdevice_many(&list); | |
1da177e4 | 473 | break; |
1c01fe14 JP |
474 | |
475 | case NETDEV_PRE_TYPE_CHANGE: | |
476 | /* Forbid underlaying device to change its type. */ | |
18c22a03 JP |
477 | if (vlan_uses_dev(dev)) |
478 | return NOTIFY_BAD; | |
479 | break; | |
99606477 BH |
480 | |
481 | case NETDEV_NOTIFY_PEERS: | |
7c899432 | 482 | case NETDEV_BONDING_FAILOVER: |
4aa5dee4 | 483 | case NETDEV_RESEND_IGMP: |
99606477 | 484 | /* Propagate to vlan devices */ |
1fd9b1fc | 485 | vlan_group_for_each_dev(grp, i, vlandev) |
7c899432 | 486 | call_netdevice_notifiers(event, vlandev); |
99606477 | 487 | break; |
3ff50b79 | 488 | } |
1da177e4 LT |
489 | |
490 | out: | |
491 | return NOTIFY_DONE; | |
492 | } | |
493 | ||
69ab4b7d PM |
494 | static struct notifier_block vlan_notifier_block __read_mostly = { |
495 | .notifier_call = vlan_device_event, | |
496 | }; | |
497 | ||
1da177e4 LT |
498 | /* |
499 | * VLAN IOCTL handler. | |
500 | * o execute requested action or pass command to the device driver | |
501 | * arg is really a struct vlan_ioctl_args __user *. | |
502 | */ | |
881d966b | 503 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
1da177e4 | 504 | { |
c17d8874 | 505 | int err; |
1da177e4 | 506 | struct vlan_ioctl_args args; |
c17d8874 | 507 | struct net_device *dev = NULL; |
1da177e4 LT |
508 | |
509 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
510 | return -EFAULT; | |
511 | ||
512 | /* Null terminate this sucker, just in case. */ | |
513 | args.device1[23] = 0; | |
514 | args.u.device2[23] = 0; | |
515 | ||
c17d8874 PM |
516 | rtnl_lock(); |
517 | ||
1da177e4 LT |
518 | switch (args.cmd) { |
519 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
c17d8874 PM |
520 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
521 | case SET_VLAN_FLAG_CMD: | |
522 | case ADD_VLAN_CMD: | |
523 | case DEL_VLAN_CMD: | |
524 | case GET_VLAN_REALDEV_NAME_CMD: | |
525 | case GET_VLAN_VID_CMD: | |
526 | err = -ENODEV; | |
65d292a2 | 527 | dev = __dev_get_by_name(net, args.device1); |
c17d8874 PM |
528 | if (!dev) |
529 | goto out; | |
530 | ||
531 | err = -EINVAL; | |
26a25239 | 532 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
c17d8874 PM |
533 | goto out; |
534 | } | |
535 | ||
536 | switch (args.cmd) { | |
537 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
538 | err = -EPERM; | |
276996fd | 539 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
540 | break; |
541 | vlan_dev_set_ingress_priority(dev, | |
542 | args.u.skb_priority, | |
543 | args.vlan_qos); | |
fffe470a | 544 | err = 0; |
1da177e4 LT |
545 | break; |
546 | ||
547 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
c17d8874 | 548 | err = -EPERM; |
276996fd | 549 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 PM |
550 | break; |
551 | err = vlan_dev_set_egress_priority(dev, | |
1da177e4 LT |
552 | args.u.skb_priority, |
553 | args.vlan_qos); | |
554 | break; | |
555 | ||
556 | case SET_VLAN_FLAG_CMD: | |
c17d8874 | 557 | err = -EPERM; |
276996fd | 558 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 559 | break; |
b3ce0325 PM |
560 | err = vlan_dev_change_flags(dev, |
561 | args.vlan_qos ? args.u.flag : 0, | |
562 | args.u.flag); | |
1da177e4 LT |
563 | break; |
564 | ||
565 | case SET_VLAN_NAME_TYPE_CMD: | |
c17d8874 | 566 | err = -EPERM; |
276996fd | 567 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
e35de026 | 568 | break; |
c17d8874 PM |
569 | if ((args.u.name_type >= 0) && |
570 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
7a17a2f7 PE |
571 | struct vlan_net *vn; |
572 | ||
573 | vn = net_generic(net, vlan_net_id); | |
574 | vn->name_type = args.u.name_type; | |
1da177e4 LT |
575 | err = 0; |
576 | } else { | |
577 | err = -EINVAL; | |
578 | } | |
579 | break; | |
580 | ||
581 | case ADD_VLAN_CMD: | |
c17d8874 | 582 | err = -EPERM; |
276996fd | 583 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 584 | break; |
2ae0bf69 | 585 | err = register_vlan_device(dev, args.u.VID); |
1da177e4 LT |
586 | break; |
587 | ||
588 | case DEL_VLAN_CMD: | |
c17d8874 | 589 | err = -EPERM; |
276996fd | 590 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c17d8874 | 591 | break; |
23289a37 | 592 | unregister_vlan_dev(dev, NULL); |
af301517 | 593 | err = 0; |
1da177e4 LT |
594 | break; |
595 | ||
1da177e4 | 596 | case GET_VLAN_REALDEV_NAME_CMD: |
3f5f4346 | 597 | err = 0; |
c17d8874 | 598 | vlan_dev_get_realdev_name(dev, args.u.device2); |
1da177e4 | 599 | if (copy_to_user(arg, &args, |
2029cc2c | 600 | sizeof(struct vlan_ioctl_args))) |
1da177e4 | 601 | err = -EFAULT; |
1da177e4 LT |
602 | break; |
603 | ||
604 | case GET_VLAN_VID_CMD: | |
3f5f4346 | 605 | err = 0; |
22d1ba74 | 606 | args.u.VID = vlan_dev_vlan_id(dev); |
1da177e4 | 607 | if (copy_to_user(arg, &args, |
2029cc2c | 608 | sizeof(struct vlan_ioctl_args))) |
122952fc | 609 | err = -EFAULT; |
1da177e4 LT |
610 | break; |
611 | ||
612 | default: | |
198a291c | 613 | err = -EOPNOTSUPP; |
c17d8874 | 614 | break; |
3ff50b79 | 615 | } |
7eb1b3d3 | 616 | out: |
c17d8874 | 617 | rtnl_unlock(); |
1da177e4 LT |
618 | return err; |
619 | } | |
620 | ||
66e5133f TM |
621 | static struct sk_buff **vlan_gro_receive(struct sk_buff **head, |
622 | struct sk_buff *skb) | |
623 | { | |
624 | struct sk_buff *p, **pp = NULL; | |
625 | struct vlan_hdr *vhdr; | |
626 | unsigned int hlen, off_vlan; | |
627 | const struct packet_offload *ptype; | |
628 | __be16 type; | |
629 | int flush = 1; | |
630 | ||
631 | off_vlan = skb_gro_offset(skb); | |
632 | hlen = off_vlan + sizeof(*vhdr); | |
633 | vhdr = skb_gro_header_fast(skb, off_vlan); | |
634 | if (skb_gro_header_hard(skb, hlen)) { | |
635 | vhdr = skb_gro_header_slow(skb, hlen, off_vlan); | |
636 | if (unlikely(!vhdr)) | |
637 | goto out; | |
638 | } | |
639 | ||
640 | type = vhdr->h_vlan_encapsulated_proto; | |
641 | ||
642 | rcu_read_lock(); | |
643 | ptype = gro_find_receive_by_type(type); | |
644 | if (!ptype) | |
645 | goto out_unlock; | |
646 | ||
647 | flush = 0; | |
648 | ||
649 | for (p = *head; p; p = p->next) { | |
650 | struct vlan_hdr *vhdr2; | |
651 | ||
652 | if (!NAPI_GRO_CB(p)->same_flow) | |
653 | continue; | |
654 | ||
655 | vhdr2 = (struct vlan_hdr *)(p->data + off_vlan); | |
656 | if (compare_vlan_header(vhdr, vhdr2)) | |
657 | NAPI_GRO_CB(p)->same_flow = 0; | |
658 | } | |
659 | ||
660 | skb_gro_pull(skb, sizeof(*vhdr)); | |
661 | skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr)); | |
662 | pp = ptype->callbacks.gro_receive(head, skb); | |
663 | ||
664 | out_unlock: | |
665 | rcu_read_unlock(); | |
666 | out: | |
667 | NAPI_GRO_CB(skb)->flush |= flush; | |
668 | ||
669 | return pp; | |
670 | } | |
671 | ||
672 | static int vlan_gro_complete(struct sk_buff *skb, int nhoff) | |
673 | { | |
674 | struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff); | |
675 | __be16 type = vhdr->h_vlan_encapsulated_proto; | |
676 | struct packet_offload *ptype; | |
677 | int err = -ENOENT; | |
678 | ||
679 | rcu_read_lock(); | |
680 | ptype = gro_find_complete_by_type(type); | |
681 | if (ptype) | |
682 | err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr)); | |
683 | ||
684 | rcu_read_unlock(); | |
685 | return err; | |
686 | } | |
687 | ||
688 | static struct packet_offload vlan_packet_offloads[] __read_mostly = { | |
689 | { | |
690 | .type = cpu_to_be16(ETH_P_8021Q), | |
691 | .priority = 10, | |
692 | .callbacks = { | |
693 | .gro_receive = vlan_gro_receive, | |
694 | .gro_complete = vlan_gro_complete, | |
695 | }, | |
696 | }, | |
697 | { | |
698 | .type = cpu_to_be16(ETH_P_8021AD), | |
699 | .priority = 10, | |
700 | .callbacks = { | |
701 | .gro_receive = vlan_gro_receive, | |
702 | .gro_complete = vlan_gro_complete, | |
703 | }, | |
704 | }, | |
705 | }; | |
706 | ||
2c8c1e72 | 707 | static int __net_init vlan_init_net(struct net *net) |
d9ed0f0e | 708 | { |
946d1a92 | 709 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
d9ed0f0e | 710 | int err; |
d9ed0f0e | 711 | |
7a17a2f7 PE |
712 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
713 | ||
cd1c7014 | 714 | err = vlan_proc_init(net); |
cd1c7014 | 715 | |
d9ed0f0e PE |
716 | return err; |
717 | } | |
718 | ||
2c8c1e72 | 719 | static void __net_exit vlan_exit_net(struct net *net) |
d9ed0f0e | 720 | { |
cd1c7014 | 721 | vlan_proc_cleanup(net); |
d9ed0f0e PE |
722 | } |
723 | ||
724 | static struct pernet_operations vlan_net_ops = { | |
725 | .init = vlan_init_net, | |
726 | .exit = vlan_exit_net, | |
946d1a92 EB |
727 | .id = &vlan_net_id, |
728 | .size = sizeof(struct vlan_net), | |
d9ed0f0e PE |
729 | }; |
730 | ||
69ab4b7d PM |
731 | static int __init vlan_proto_init(void) |
732 | { | |
733 | int err; | |
66e5133f | 734 | unsigned int i; |
69ab4b7d | 735 | |
da7c06c4 | 736 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
69ab4b7d | 737 | |
91e2ff35 | 738 | err = register_pernet_subsys(&vlan_net_ops); |
d9ed0f0e PE |
739 | if (err < 0) |
740 | goto err0; | |
741 | ||
69ab4b7d PM |
742 | err = register_netdevice_notifier(&vlan_notifier_block); |
743 | if (err < 0) | |
744 | goto err2; | |
745 | ||
70c03b49 | 746 | err = vlan_gvrp_init(); |
69ab4b7d PM |
747 | if (err < 0) |
748 | goto err3; | |
749 | ||
86fbe9bb | 750 | err = vlan_mvrp_init(); |
70c03b49 PM |
751 | if (err < 0) |
752 | goto err4; | |
753 | ||
86fbe9bb DW |
754 | err = vlan_netlink_init(); |
755 | if (err < 0) | |
756 | goto err5; | |
757 | ||
66e5133f TM |
758 | for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) |
759 | dev_add_offload(&vlan_packet_offloads[i]); | |
760 | ||
69ab4b7d PM |
761 | vlan_ioctl_set(vlan_ioctl_handler); |
762 | return 0; | |
763 | ||
86fbe9bb DW |
764 | err5: |
765 | vlan_mvrp_uninit(); | |
70c03b49 PM |
766 | err4: |
767 | vlan_gvrp_uninit(); | |
69ab4b7d PM |
768 | err3: |
769 | unregister_netdevice_notifier(&vlan_notifier_block); | |
770 | err2: | |
91e2ff35 | 771 | unregister_pernet_subsys(&vlan_net_ops); |
d9ed0f0e | 772 | err0: |
69ab4b7d PM |
773 | return err; |
774 | } | |
775 | ||
776 | static void __exit vlan_cleanup_module(void) | |
777 | { | |
66e5133f TM |
778 | unsigned int i; |
779 | ||
69ab4b7d | 780 | vlan_ioctl_set(NULL); |
66e5133f TM |
781 | |
782 | for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) | |
783 | dev_remove_offload(&vlan_packet_offloads[i]); | |
784 | ||
69ab4b7d PM |
785 | vlan_netlink_fini(); |
786 | ||
787 | unregister_netdevice_notifier(&vlan_notifier_block); | |
788 | ||
91e2ff35 | 789 | unregister_pernet_subsys(&vlan_net_ops); |
6e327c11 | 790 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
70c03b49 | 791 | |
86fbe9bb | 792 | vlan_mvrp_uninit(); |
70c03b49 | 793 | vlan_gvrp_uninit(); |
69ab4b7d PM |
794 | } |
795 | ||
796 | module_init(vlan_proto_init); | |
797 | module_exit(vlan_cleanup_module); | |
798 | ||
1da177e4 LT |
799 | MODULE_LICENSE("GPL"); |
800 | MODULE_VERSION(DRV_VERSION); |