Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
7750f403 PM |
2 | #include <linux/skbuff.h> |
3 | #include <linux/netdevice.h> | |
4 | #include <linux/if_vlan.h> | |
4ead4431 | 5 | #include <linux/netpoll.h> |
bc3b2d7f | 6 | #include <linux/export.h> |
7750f403 PM |
7 | #include "vlan.h" |
8 | ||
48cc32d3 | 9 | bool vlan_do_receive(struct sk_buff **skbp) |
7750f403 | 10 | { |
3701e513 | 11 | struct sk_buff *skb = *skbp; |
86a9bad3 | 12 | __be16 vlan_proto = skb->vlan_proto; |
df8a39de | 13 | u16 vlan_id = skb_vlan_tag_get_id(skb); |
ad1afb00 | 14 | struct net_device *vlan_dev; |
4af429d2 | 15 | struct vlan_pcpu_stats *rx_stats; |
7750f403 | 16 | |
86a9bad3 | 17 | vlan_dev = vlan_find_dev(skb->dev, vlan_proto, vlan_id); |
48cc32d3 | 18 | if (!vlan_dev) |
3701e513 | 19 | return false; |
9b22ea56 | 20 | |
3701e513 JG |
21 | skb = *skbp = skb_share_check(skb, GFP_ATOMIC); |
22 | if (unlikely(!skb)) | |
23 | return false; | |
e769fcec VN |
24 | |
25 | if (unlikely(!(vlan_dev->flags & IFF_UP))) { | |
26 | kfree_skb(skb); | |
27 | *skbp = NULL; | |
28 | return false; | |
29 | } | |
e1c096e2 | 30 | |
3701e513 | 31 | skb->dev = vlan_dev; |
375f67df | 32 | if (unlikely(skb->pkt_type == PACKET_OTHERHOST)) { |
0b5c9db1 JP |
33 | /* Our lower layer thinks this is not local, let's make sure. |
34 | * This allows the VLAN to have a different MAC than the | |
35 | * underlying device, and still route correctly. */ | |
be14cc98 | 36 | if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, vlan_dev->dev_addr)) |
0b5c9db1 JP |
37 | skb->pkt_type = PACKET_HOST; |
38 | } | |
39 | ||
28f9ee22 VY |
40 | if (!(vlan_dev_priv(vlan_dev)->flags & VLAN_FLAG_REORDER_HDR) && |
41 | !netif_is_macvlan_port(vlan_dev) && | |
42 | !netif_is_bridge_port(vlan_dev)) { | |
0b5c9db1 JP |
43 | unsigned int offset = skb->data - skb_mac_header(skb); |
44 | ||
45 | /* | |
46 | * vlan_insert_tag expect skb->data pointing to mac header. | |
47 | * So change skb->data before calling it and change back to | |
48 | * original position later | |
49 | */ | |
50 | skb_push(skb, offset); | |
cbe7128c TM |
51 | skb = *skbp = vlan_insert_inner_tag(skb, skb->vlan_proto, |
52 | skb->vlan_tci, skb->mac_len); | |
0b5c9db1 JP |
53 | if (!skb) |
54 | return false; | |
55 | skb_pull(skb, offset + VLAN_HLEN); | |
56 | skb_reset_mac_len(skb); | |
57 | } | |
58 | ||
3701e513 | 59 | skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci); |
418a976d | 60 | __vlan_hwaccel_clear_tag(skb); |
7750f403 | 61 | |
7da82c06 | 62 | rx_stats = this_cpu_ptr(vlan_dev_priv(vlan_dev)->vlan_pcpu_stats); |
9793241f | 63 | |
9618e2ff | 64 | u64_stats_update_begin(&rx_stats->syncp); |
9793241f ED |
65 | rx_stats->rx_packets++; |
66 | rx_stats->rx_bytes += skb->len; | |
0b5c9db1 | 67 | if (skb->pkt_type == PACKET_MULTICAST) |
9618e2ff | 68 | rx_stats->rx_multicast++; |
9618e2ff | 69 | u64_stats_update_end(&rx_stats->syncp); |
3701e513 JG |
70 | |
71 | return true; | |
7750f403 | 72 | } |
22d1ba74 | 73 | |
1cdfd72f | 74 | /* Must be invoked with rcu_read_lock. */ |
f06c7f9f | 75 | struct net_device *__vlan_find_dev_deep_rcu(struct net_device *dev, |
1fd9b1fc | 76 | __be16 vlan_proto, u16 vlan_id) |
cec9c133 | 77 | { |
1cdfd72f | 78 | struct vlan_info *vlan_info = rcu_dereference(dev->vlan_info); |
cec9c133 | 79 | |
5b9ea6e0 | 80 | if (vlan_info) { |
1fd9b1fc PM |
81 | return vlan_group_get_device(&vlan_info->grp, |
82 | vlan_proto, vlan_id); | |
cec9c133 JP |
83 | } else { |
84 | /* | |
1cdfd72f JP |
85 | * Lower devices of master uppers (bonding, team) do not have |
86 | * grp assigned to themselves. Grp is assigned to upper device | |
87 | * instead. | |
cec9c133 | 88 | */ |
1cdfd72f JP |
89 | struct net_device *upper_dev; |
90 | ||
91 | upper_dev = netdev_master_upper_dev_get_rcu(dev); | |
92 | if (upper_dev) | |
f06c7f9f | 93 | return __vlan_find_dev_deep_rcu(upper_dev, |
1fd9b1fc | 94 | vlan_proto, vlan_id); |
cec9c133 JP |
95 | } |
96 | ||
97 | return NULL; | |
98 | } | |
f06c7f9f | 99 | EXPORT_SYMBOL(__vlan_find_dev_deep_rcu); |
cec9c133 | 100 | |
22d1ba74 PM |
101 | struct net_device *vlan_dev_real_dev(const struct net_device *dev) |
102 | { | |
0369722f | 103 | struct net_device *ret = vlan_dev_priv(dev)->real_dev; |
104 | ||
105 | while (is_vlan_dev(ret)) | |
106 | ret = vlan_dev_priv(ret)->real_dev; | |
107 | ||
108 | return ret; | |
22d1ba74 | 109 | } |
116cb428 | 110 | EXPORT_SYMBOL(vlan_dev_real_dev); |
22d1ba74 PM |
111 | |
112 | u16 vlan_dev_vlan_id(const struct net_device *dev) | |
113 | { | |
7da82c06 | 114 | return vlan_dev_priv(dev)->vlan_id; |
22d1ba74 | 115 | } |
116cb428 | 116 | EXPORT_SYMBOL(vlan_dev_vlan_id); |
e1c096e2 | 117 | |
71e415e4 | 118 | __be16 vlan_dev_vlan_proto(const struct net_device *dev) |
119 | { | |
120 | return vlan_dev_priv(dev)->vlan_proto; | |
121 | } | |
122 | EXPORT_SYMBOL(vlan_dev_vlan_proto); | |
123 | ||
5b9ea6e0 JP |
124 | /* |
125 | * vlan info and vid list | |
126 | */ | |
127 | ||
128 | static void vlan_group_free(struct vlan_group *grp) | |
129 | { | |
cf2c014a | 130 | int i, j; |
5b9ea6e0 | 131 | |
cf2c014a PM |
132 | for (i = 0; i < VLAN_PROTO_NUM; i++) |
133 | for (j = 0; j < VLAN_GROUP_ARRAY_SPLIT_PARTS; j++) | |
134 | kfree(grp->vlan_devices_arrays[i][j]); | |
5b9ea6e0 JP |
135 | } |
136 | ||
137 | static void vlan_info_free(struct vlan_info *vlan_info) | |
138 | { | |
139 | vlan_group_free(&vlan_info->grp); | |
140 | kfree(vlan_info); | |
141 | } | |
142 | ||
143 | static void vlan_info_rcu_free(struct rcu_head *rcu) | |
144 | { | |
145 | vlan_info_free(container_of(rcu, struct vlan_info, rcu)); | |
146 | } | |
147 | ||
148 | static struct vlan_info *vlan_info_alloc(struct net_device *dev) | |
149 | { | |
150 | struct vlan_info *vlan_info; | |
151 | ||
152 | vlan_info = kzalloc(sizeof(struct vlan_info), GFP_KERNEL); | |
153 | if (!vlan_info) | |
154 | return NULL; | |
155 | ||
156 | vlan_info->real_dev = dev; | |
157 | INIT_LIST_HEAD(&vlan_info->vid_list); | |
158 | return vlan_info; | |
159 | } | |
160 | ||
161 | struct vlan_vid_info { | |
162 | struct list_head list; | |
80d5c368 PM |
163 | __be16 proto; |
164 | u16 vid; | |
5b9ea6e0 JP |
165 | int refcount; |
166 | }; | |
167 | ||
eeb0a2a5 | 168 | static bool vlan_hw_filter_capable(const struct net_device *dev, __be16 proto) |
8ad227ff | 169 | { |
9daae9bd | 170 | if (proto == htons(ETH_P_8021Q) && |
8ad227ff PM |
171 | dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) |
172 | return true; | |
9daae9bd | 173 | if (proto == htons(ETH_P_8021AD) && |
8ad227ff PM |
174 | dev->features & NETIF_F_HW_VLAN_STAG_FILTER) |
175 | return true; | |
176 | return false; | |
177 | } | |
178 | ||
5b9ea6e0 | 179 | static struct vlan_vid_info *vlan_vid_info_get(struct vlan_info *vlan_info, |
80d5c368 | 180 | __be16 proto, u16 vid) |
5b9ea6e0 JP |
181 | { |
182 | struct vlan_vid_info *vid_info; | |
183 | ||
184 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) { | |
80d5c368 | 185 | if (vid_info->proto == proto && vid_info->vid == vid) |
5b9ea6e0 JP |
186 | return vid_info; |
187 | } | |
188 | return NULL; | |
189 | } | |
190 | ||
80d5c368 | 191 | static struct vlan_vid_info *vlan_vid_info_alloc(__be16 proto, u16 vid) |
5b9ea6e0 JP |
192 | { |
193 | struct vlan_vid_info *vid_info; | |
194 | ||
195 | vid_info = kzalloc(sizeof(struct vlan_vid_info), GFP_KERNEL); | |
196 | if (!vid_info) | |
197 | return NULL; | |
80d5c368 | 198 | vid_info->proto = proto; |
5b9ea6e0 JP |
199 | vid_info->vid = vid; |
200 | ||
201 | return vid_info; | |
202 | } | |
203 | ||
9daae9bd GP |
204 | static int vlan_add_rx_filter_info(struct net_device *dev, __be16 proto, u16 vid) |
205 | { | |
206 | if (!vlan_hw_filter_capable(dev, proto)) | |
207 | return 0; | |
208 | ||
209 | if (netif_device_present(dev)) | |
210 | return dev->netdev_ops->ndo_vlan_rx_add_vid(dev, proto, vid); | |
211 | else | |
212 | return -ENODEV; | |
213 | } | |
214 | ||
215 | static int vlan_kill_rx_filter_info(struct net_device *dev, __be16 proto, u16 vid) | |
216 | { | |
217 | if (!vlan_hw_filter_capable(dev, proto)) | |
218 | return 0; | |
219 | ||
220 | if (netif_device_present(dev)) | |
221 | return dev->netdev_ops->ndo_vlan_rx_kill_vid(dev, proto, vid); | |
222 | else | |
223 | return -ENODEV; | |
224 | } | |
225 | ||
960abf68 IK |
226 | int vlan_for_each(struct net_device *dev, |
227 | int (*action)(struct net_device *dev, int vid, void *arg), | |
228 | void *arg) | |
229 | { | |
230 | struct vlan_vid_info *vid_info; | |
231 | struct vlan_info *vlan_info; | |
232 | struct net_device *vdev; | |
233 | int ret; | |
234 | ||
235 | ASSERT_RTNL(); | |
236 | ||
237 | vlan_info = rtnl_dereference(dev->vlan_info); | |
238 | if (!vlan_info) | |
239 | return 0; | |
240 | ||
241 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) { | |
242 | vdev = vlan_group_get_device(&vlan_info->grp, vid_info->proto, | |
243 | vid_info->vid); | |
244 | ret = action(vdev, vid_info->vid, arg); | |
245 | if (ret) | |
246 | return ret; | |
247 | } | |
248 | ||
249 | return 0; | |
250 | } | |
251 | EXPORT_SYMBOL(vlan_for_each); | |
252 | ||
9daae9bd GP |
253 | int vlan_filter_push_vids(struct vlan_info *vlan_info, __be16 proto) |
254 | { | |
255 | struct net_device *real_dev = vlan_info->real_dev; | |
256 | struct vlan_vid_info *vlan_vid_info; | |
257 | int err; | |
258 | ||
259 | list_for_each_entry(vlan_vid_info, &vlan_info->vid_list, list) { | |
260 | if (vlan_vid_info->proto == proto) { | |
261 | err = vlan_add_rx_filter_info(real_dev, proto, | |
262 | vlan_vid_info->vid); | |
263 | if (err) | |
264 | goto unwind; | |
265 | } | |
266 | } | |
267 | ||
268 | return 0; | |
269 | ||
270 | unwind: | |
271 | list_for_each_entry_continue_reverse(vlan_vid_info, | |
272 | &vlan_info->vid_list, list) { | |
273 | if (vlan_vid_info->proto == proto) | |
274 | vlan_kill_rx_filter_info(real_dev, proto, | |
275 | vlan_vid_info->vid); | |
276 | } | |
277 | ||
278 | return err; | |
279 | } | |
280 | EXPORT_SYMBOL(vlan_filter_push_vids); | |
281 | ||
282 | void vlan_filter_drop_vids(struct vlan_info *vlan_info, __be16 proto) | |
283 | { | |
284 | struct vlan_vid_info *vlan_vid_info; | |
285 | ||
286 | list_for_each_entry(vlan_vid_info, &vlan_info->vid_list, list) | |
287 | if (vlan_vid_info->proto == proto) | |
288 | vlan_kill_rx_filter_info(vlan_info->real_dev, | |
289 | vlan_vid_info->proto, | |
290 | vlan_vid_info->vid); | |
291 | } | |
292 | EXPORT_SYMBOL(vlan_filter_drop_vids); | |
293 | ||
80d5c368 | 294 | static int __vlan_vid_add(struct vlan_info *vlan_info, __be16 proto, u16 vid, |
5b9ea6e0 | 295 | struct vlan_vid_info **pvid_info) |
87002b03 | 296 | { |
5b9ea6e0 | 297 | struct net_device *dev = vlan_info->real_dev; |
5b9ea6e0 JP |
298 | struct vlan_vid_info *vid_info; |
299 | int err; | |
300 | ||
80d5c368 | 301 | vid_info = vlan_vid_info_alloc(proto, vid); |
5b9ea6e0 JP |
302 | if (!vid_info) |
303 | return -ENOMEM; | |
87002b03 | 304 | |
9daae9bd GP |
305 | err = vlan_add_rx_filter_info(dev, proto, vid); |
306 | if (err) { | |
307 | kfree(vid_info); | |
308 | return err; | |
87002b03 | 309 | } |
9daae9bd | 310 | |
5b9ea6e0 JP |
311 | list_add(&vid_info->list, &vlan_info->vid_list); |
312 | vlan_info->nr_vids++; | |
313 | *pvid_info = vid_info; | |
87002b03 JP |
314 | return 0; |
315 | } | |
5b9ea6e0 | 316 | |
80d5c368 | 317 | int vlan_vid_add(struct net_device *dev, __be16 proto, u16 vid) |
5b9ea6e0 JP |
318 | { |
319 | struct vlan_info *vlan_info; | |
320 | struct vlan_vid_info *vid_info; | |
321 | bool vlan_info_created = false; | |
322 | int err; | |
323 | ||
324 | ASSERT_RTNL(); | |
325 | ||
326 | vlan_info = rtnl_dereference(dev->vlan_info); | |
327 | if (!vlan_info) { | |
328 | vlan_info = vlan_info_alloc(dev); | |
329 | if (!vlan_info) | |
330 | return -ENOMEM; | |
331 | vlan_info_created = true; | |
332 | } | |
80d5c368 | 333 | vid_info = vlan_vid_info_get(vlan_info, proto, vid); |
5b9ea6e0 | 334 | if (!vid_info) { |
80d5c368 | 335 | err = __vlan_vid_add(vlan_info, proto, vid, &vid_info); |
5b9ea6e0 JP |
336 | if (err) |
337 | goto out_free_vlan_info; | |
338 | } | |
339 | vid_info->refcount++; | |
340 | ||
341 | if (vlan_info_created) | |
342 | rcu_assign_pointer(dev->vlan_info, vlan_info); | |
343 | ||
344 | return 0; | |
345 | ||
346 | out_free_vlan_info: | |
347 | if (vlan_info_created) | |
348 | kfree(vlan_info); | |
349 | return err; | |
350 | } | |
87002b03 JP |
351 | EXPORT_SYMBOL(vlan_vid_add); |
352 | ||
5b9ea6e0 JP |
353 | static void __vlan_vid_del(struct vlan_info *vlan_info, |
354 | struct vlan_vid_info *vid_info) | |
87002b03 | 355 | { |
5b9ea6e0 | 356 | struct net_device *dev = vlan_info->real_dev; |
80d5c368 PM |
357 | __be16 proto = vid_info->proto; |
358 | u16 vid = vid_info->vid; | |
5b9ea6e0 | 359 | int err; |
87002b03 | 360 | |
9daae9bd GP |
361 | err = vlan_kill_rx_filter_info(dev, proto, vid); |
362 | if (err) | |
363 | pr_warn("failed to kill vid %04x/%d for device %s\n", | |
364 | proto, vid, dev->name); | |
365 | ||
5b9ea6e0 JP |
366 | list_del(&vid_info->list); |
367 | kfree(vid_info); | |
368 | vlan_info->nr_vids--; | |
369 | } | |
370 | ||
80d5c368 | 371 | void vlan_vid_del(struct net_device *dev, __be16 proto, u16 vid) |
5b9ea6e0 JP |
372 | { |
373 | struct vlan_info *vlan_info; | |
374 | struct vlan_vid_info *vid_info; | |
375 | ||
376 | ASSERT_RTNL(); | |
377 | ||
378 | vlan_info = rtnl_dereference(dev->vlan_info); | |
379 | if (!vlan_info) | |
380 | return; | |
381 | ||
80d5c368 | 382 | vid_info = vlan_vid_info_get(vlan_info, proto, vid); |
5b9ea6e0 JP |
383 | if (!vid_info) |
384 | return; | |
385 | vid_info->refcount--; | |
386 | if (vid_info->refcount == 0) { | |
387 | __vlan_vid_del(vlan_info, vid_info); | |
388 | if (vlan_info->nr_vids == 0) { | |
389 | RCU_INIT_POINTER(dev->vlan_info, NULL); | |
390 | call_rcu(&vlan_info->rcu, vlan_info_rcu_free); | |
391 | } | |
87002b03 JP |
392 | } |
393 | } | |
394 | EXPORT_SYMBOL(vlan_vid_del); | |
348a1443 JP |
395 | |
396 | int vlan_vids_add_by_dev(struct net_device *dev, | |
397 | const struct net_device *by_dev) | |
398 | { | |
399 | struct vlan_vid_info *vid_info; | |
f9586f79 | 400 | struct vlan_info *vlan_info; |
348a1443 JP |
401 | int err; |
402 | ||
403 | ASSERT_RTNL(); | |
404 | ||
f9586f79 DC |
405 | vlan_info = rtnl_dereference(by_dev->vlan_info); |
406 | if (!vlan_info) | |
348a1443 JP |
407 | return 0; |
408 | ||
f9586f79 | 409 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) { |
80d5c368 | 410 | err = vlan_vid_add(dev, vid_info->proto, vid_info->vid); |
348a1443 JP |
411 | if (err) |
412 | goto unwind; | |
413 | } | |
414 | return 0; | |
415 | ||
416 | unwind: | |
417 | list_for_each_entry_continue_reverse(vid_info, | |
f9586f79 | 418 | &vlan_info->vid_list, |
348a1443 | 419 | list) { |
80d5c368 | 420 | vlan_vid_del(dev, vid_info->proto, vid_info->vid); |
348a1443 JP |
421 | } |
422 | ||
423 | return err; | |
424 | } | |
425 | EXPORT_SYMBOL(vlan_vids_add_by_dev); | |
426 | ||
427 | void vlan_vids_del_by_dev(struct net_device *dev, | |
428 | const struct net_device *by_dev) | |
429 | { | |
430 | struct vlan_vid_info *vid_info; | |
f9586f79 | 431 | struct vlan_info *vlan_info; |
348a1443 JP |
432 | |
433 | ASSERT_RTNL(); | |
434 | ||
f9586f79 DC |
435 | vlan_info = rtnl_dereference(by_dev->vlan_info); |
436 | if (!vlan_info) | |
348a1443 JP |
437 | return; |
438 | ||
f9586f79 | 439 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) |
80d5c368 | 440 | vlan_vid_del(dev, vid_info->proto, vid_info->vid); |
348a1443 JP |
441 | } |
442 | EXPORT_SYMBOL(vlan_vids_del_by_dev); | |
9b361c13 JP |
443 | |
444 | bool vlan_uses_dev(const struct net_device *dev) | |
445 | { | |
55462cf3 JP |
446 | struct vlan_info *vlan_info; |
447 | ||
448 | ASSERT_RTNL(); | |
449 | ||
450 | vlan_info = rtnl_dereference(dev->vlan_info); | |
451 | if (!vlan_info) | |
452 | return false; | |
453 | return vlan_info->grp.nr_vlan_devs ? true : false; | |
9b361c13 JP |
454 | } |
455 | EXPORT_SYMBOL(vlan_uses_dev); | |
32764c66 JP |
456 | |
457 | static struct sk_buff *vlan_gro_receive(struct list_head *head, | |
458 | struct sk_buff *skb) | |
459 | { | |
460 | const struct packet_offload *ptype; | |
461 | unsigned int hlen, off_vlan; | |
462 | struct sk_buff *pp = NULL; | |
463 | struct vlan_hdr *vhdr; | |
464 | struct sk_buff *p; | |
465 | __be16 type; | |
466 | int flush = 1; | |
467 | ||
468 | off_vlan = skb_gro_offset(skb); | |
469 | hlen = off_vlan + sizeof(*vhdr); | |
470 | vhdr = skb_gro_header_fast(skb, off_vlan); | |
471 | if (skb_gro_header_hard(skb, hlen)) { | |
472 | vhdr = skb_gro_header_slow(skb, hlen, off_vlan); | |
473 | if (unlikely(!vhdr)) | |
474 | goto out; | |
475 | } | |
476 | ||
477 | type = vhdr->h_vlan_encapsulated_proto; | |
478 | ||
479 | rcu_read_lock(); | |
480 | ptype = gro_find_receive_by_type(type); | |
481 | if (!ptype) | |
482 | goto out_unlock; | |
483 | ||
484 | flush = 0; | |
485 | ||
486 | list_for_each_entry(p, head, list) { | |
487 | struct vlan_hdr *vhdr2; | |
488 | ||
489 | if (!NAPI_GRO_CB(p)->same_flow) | |
490 | continue; | |
491 | ||
492 | vhdr2 = (struct vlan_hdr *)(p->data + off_vlan); | |
493 | if (compare_vlan_header(vhdr, vhdr2)) | |
494 | NAPI_GRO_CB(p)->same_flow = 0; | |
495 | } | |
496 | ||
497 | skb_gro_pull(skb, sizeof(*vhdr)); | |
498 | skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr)); | |
499 | pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); | |
500 | ||
501 | out_unlock: | |
502 | rcu_read_unlock(); | |
503 | out: | |
504 | skb_gro_flush_final(skb, pp, flush); | |
505 | ||
506 | return pp; | |
507 | } | |
508 | ||
509 | static int vlan_gro_complete(struct sk_buff *skb, int nhoff) | |
510 | { | |
511 | struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff); | |
512 | __be16 type = vhdr->h_vlan_encapsulated_proto; | |
513 | struct packet_offload *ptype; | |
514 | int err = -ENOENT; | |
515 | ||
516 | rcu_read_lock(); | |
517 | ptype = gro_find_complete_by_type(type); | |
518 | if (ptype) | |
519 | err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr)); | |
520 | ||
521 | rcu_read_unlock(); | |
522 | return err; | |
523 | } | |
524 | ||
525 | static struct packet_offload vlan_packet_offloads[] __read_mostly = { | |
526 | { | |
527 | .type = cpu_to_be16(ETH_P_8021Q), | |
528 | .priority = 10, | |
529 | .callbacks = { | |
530 | .gro_receive = vlan_gro_receive, | |
531 | .gro_complete = vlan_gro_complete, | |
532 | }, | |
533 | }, | |
534 | { | |
535 | .type = cpu_to_be16(ETH_P_8021AD), | |
536 | .priority = 10, | |
537 | .callbacks = { | |
538 | .gro_receive = vlan_gro_receive, | |
539 | .gro_complete = vlan_gro_complete, | |
540 | }, | |
541 | }, | |
542 | }; | |
543 | ||
544 | static int __init vlan_offload_init(void) | |
545 | { | |
546 | unsigned int i; | |
547 | ||
548 | for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) | |
549 | dev_add_offload(&vlan_packet_offloads[i]); | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | fs_initcall(vlan_offload_init); |