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> |
4a6e7ec9 | 7 | #include <net/gro.h> |
7750f403 PM |
8 | #include "vlan.h" |
9 | ||
48cc32d3 | 10 | bool vlan_do_receive(struct sk_buff **skbp) |
7750f403 | 11 | { |
3701e513 | 12 | struct sk_buff *skb = *skbp; |
86a9bad3 | 13 | __be16 vlan_proto = skb->vlan_proto; |
df8a39de | 14 | u16 vlan_id = skb_vlan_tag_get_id(skb); |
ad1afb00 | 15 | struct net_device *vlan_dev; |
4af429d2 | 16 | struct vlan_pcpu_stats *rx_stats; |
7750f403 | 17 | |
86a9bad3 | 18 | vlan_dev = vlan_find_dev(skb->dev, vlan_proto, vlan_id); |
48cc32d3 | 19 | if (!vlan_dev) |
3701e513 | 20 | return false; |
9b22ea56 | 21 | |
3701e513 JG |
22 | skb = *skbp = skb_share_check(skb, GFP_ATOMIC); |
23 | if (unlikely(!skb)) | |
24 | return false; | |
e769fcec VN |
25 | |
26 | if (unlikely(!(vlan_dev->flags & IFF_UP))) { | |
27 | kfree_skb(skb); | |
28 | *skbp = NULL; | |
29 | return false; | |
30 | } | |
e1c096e2 | 31 | |
3701e513 | 32 | skb->dev = vlan_dev; |
375f67df | 33 | if (unlikely(skb->pkt_type == PACKET_OTHERHOST)) { |
0b5c9db1 JP |
34 | /* Our lower layer thinks this is not local, let's make sure. |
35 | * This allows the VLAN to have a different MAC than the | |
36 | * underlying device, and still route correctly. */ | |
be14cc98 | 37 | if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, vlan_dev->dev_addr)) |
0b5c9db1 JP |
38 | skb->pkt_type = PACKET_HOST; |
39 | } | |
40 | ||
28f9ee22 VY |
41 | if (!(vlan_dev_priv(vlan_dev)->flags & VLAN_FLAG_REORDER_HDR) && |
42 | !netif_is_macvlan_port(vlan_dev) && | |
43 | !netif_is_bridge_port(vlan_dev)) { | |
0b5c9db1 JP |
44 | unsigned int offset = skb->data - skb_mac_header(skb); |
45 | ||
46 | /* | |
47 | * vlan_insert_tag expect skb->data pointing to mac header. | |
48 | * So change skb->data before calling it and change back to | |
49 | * original position later | |
50 | */ | |
51 | skb_push(skb, offset); | |
cbe7128c TM |
52 | skb = *skbp = vlan_insert_inner_tag(skb, skb->vlan_proto, |
53 | skb->vlan_tci, skb->mac_len); | |
0b5c9db1 JP |
54 | if (!skb) |
55 | return false; | |
56 | skb_pull(skb, offset + VLAN_HLEN); | |
57 | skb_reset_mac_len(skb); | |
58 | } | |
59 | ||
3701e513 | 60 | skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci); |
418a976d | 61 | __vlan_hwaccel_clear_tag(skb); |
7750f403 | 62 | |
7da82c06 | 63 | rx_stats = this_cpu_ptr(vlan_dev_priv(vlan_dev)->vlan_pcpu_stats); |
9793241f | 64 | |
9618e2ff | 65 | u64_stats_update_begin(&rx_stats->syncp); |
09cca53c ED |
66 | u64_stats_inc(&rx_stats->rx_packets); |
67 | u64_stats_add(&rx_stats->rx_bytes, skb->len); | |
0b5c9db1 | 68 | if (skb->pkt_type == PACKET_MULTICAST) |
09cca53c | 69 | u64_stats_inc(&rx_stats->rx_multicast); |
9618e2ff | 70 | u64_stats_update_end(&rx_stats->syncp); |
3701e513 JG |
71 | |
72 | return true; | |
7750f403 | 73 | } |
22d1ba74 | 74 | |
1cdfd72f | 75 | /* Must be invoked with rcu_read_lock. */ |
f06c7f9f | 76 | struct net_device *__vlan_find_dev_deep_rcu(struct net_device *dev, |
1fd9b1fc | 77 | __be16 vlan_proto, u16 vlan_id) |
cec9c133 | 78 | { |
1cdfd72f | 79 | struct vlan_info *vlan_info = rcu_dereference(dev->vlan_info); |
cec9c133 | 80 | |
5b9ea6e0 | 81 | if (vlan_info) { |
1fd9b1fc PM |
82 | return vlan_group_get_device(&vlan_info->grp, |
83 | vlan_proto, vlan_id); | |
cec9c133 JP |
84 | } else { |
85 | /* | |
1cdfd72f JP |
86 | * Lower devices of master uppers (bonding, team) do not have |
87 | * grp assigned to themselves. Grp is assigned to upper device | |
88 | * instead. | |
cec9c133 | 89 | */ |
1cdfd72f JP |
90 | struct net_device *upper_dev; |
91 | ||
92 | upper_dev = netdev_master_upper_dev_get_rcu(dev); | |
93 | if (upper_dev) | |
f06c7f9f | 94 | return __vlan_find_dev_deep_rcu(upper_dev, |
1fd9b1fc | 95 | vlan_proto, vlan_id); |
cec9c133 JP |
96 | } |
97 | ||
98 | return NULL; | |
99 | } | |
f06c7f9f | 100 | EXPORT_SYMBOL(__vlan_find_dev_deep_rcu); |
cec9c133 | 101 | |
22d1ba74 PM |
102 | struct net_device *vlan_dev_real_dev(const struct net_device *dev) |
103 | { | |
0369722f | 104 | struct net_device *ret = vlan_dev_priv(dev)->real_dev; |
105 | ||
106 | while (is_vlan_dev(ret)) | |
107 | ret = vlan_dev_priv(ret)->real_dev; | |
108 | ||
109 | return ret; | |
22d1ba74 | 110 | } |
116cb428 | 111 | EXPORT_SYMBOL(vlan_dev_real_dev); |
22d1ba74 PM |
112 | |
113 | u16 vlan_dev_vlan_id(const struct net_device *dev) | |
114 | { | |
7da82c06 | 115 | return vlan_dev_priv(dev)->vlan_id; |
22d1ba74 | 116 | } |
116cb428 | 117 | EXPORT_SYMBOL(vlan_dev_vlan_id); |
e1c096e2 | 118 | |
71e415e4 | 119 | __be16 vlan_dev_vlan_proto(const struct net_device *dev) |
120 | { | |
121 | return vlan_dev_priv(dev)->vlan_proto; | |
122 | } | |
123 | EXPORT_SYMBOL(vlan_dev_vlan_proto); | |
124 | ||
5b9ea6e0 JP |
125 | /* |
126 | * vlan info and vid list | |
127 | */ | |
128 | ||
129 | static void vlan_group_free(struct vlan_group *grp) | |
130 | { | |
cf2c014a | 131 | int i, j; |
5b9ea6e0 | 132 | |
cf2c014a PM |
133 | for (i = 0; i < VLAN_PROTO_NUM; i++) |
134 | for (j = 0; j < VLAN_GROUP_ARRAY_SPLIT_PARTS; j++) | |
135 | kfree(grp->vlan_devices_arrays[i][j]); | |
5b9ea6e0 JP |
136 | } |
137 | ||
138 | static void vlan_info_free(struct vlan_info *vlan_info) | |
139 | { | |
140 | vlan_group_free(&vlan_info->grp); | |
141 | kfree(vlan_info); | |
142 | } | |
143 | ||
144 | static void vlan_info_rcu_free(struct rcu_head *rcu) | |
145 | { | |
146 | vlan_info_free(container_of(rcu, struct vlan_info, rcu)); | |
147 | } | |
148 | ||
149 | static struct vlan_info *vlan_info_alloc(struct net_device *dev) | |
150 | { | |
151 | struct vlan_info *vlan_info; | |
152 | ||
153 | vlan_info = kzalloc(sizeof(struct vlan_info), GFP_KERNEL); | |
154 | if (!vlan_info) | |
155 | return NULL; | |
156 | ||
157 | vlan_info->real_dev = dev; | |
158 | INIT_LIST_HEAD(&vlan_info->vid_list); | |
159 | return vlan_info; | |
160 | } | |
161 | ||
162 | struct vlan_vid_info { | |
163 | struct list_head list; | |
80d5c368 PM |
164 | __be16 proto; |
165 | u16 vid; | |
5b9ea6e0 JP |
166 | int refcount; |
167 | }; | |
168 | ||
eeb0a2a5 | 169 | static bool vlan_hw_filter_capable(const struct net_device *dev, __be16 proto) |
8ad227ff | 170 | { |
9daae9bd | 171 | if (proto == htons(ETH_P_8021Q) && |
8ad227ff PM |
172 | dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) |
173 | return true; | |
9daae9bd | 174 | if (proto == htons(ETH_P_8021AD) && |
8ad227ff PM |
175 | dev->features & NETIF_F_HW_VLAN_STAG_FILTER) |
176 | return true; | |
177 | return false; | |
178 | } | |
179 | ||
5b9ea6e0 | 180 | static struct vlan_vid_info *vlan_vid_info_get(struct vlan_info *vlan_info, |
80d5c368 | 181 | __be16 proto, u16 vid) |
5b9ea6e0 JP |
182 | { |
183 | struct vlan_vid_info *vid_info; | |
184 | ||
185 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) { | |
80d5c368 | 186 | if (vid_info->proto == proto && vid_info->vid == vid) |
5b9ea6e0 JP |
187 | return vid_info; |
188 | } | |
189 | return NULL; | |
190 | } | |
191 | ||
80d5c368 | 192 | static struct vlan_vid_info *vlan_vid_info_alloc(__be16 proto, u16 vid) |
5b9ea6e0 JP |
193 | { |
194 | struct vlan_vid_info *vid_info; | |
195 | ||
196 | vid_info = kzalloc(sizeof(struct vlan_vid_info), GFP_KERNEL); | |
197 | if (!vid_info) | |
198 | return NULL; | |
80d5c368 | 199 | vid_info->proto = proto; |
5b9ea6e0 JP |
200 | vid_info->vid = vid; |
201 | ||
202 | return vid_info; | |
203 | } | |
204 | ||
9daae9bd GP |
205 | static int vlan_add_rx_filter_info(struct net_device *dev, __be16 proto, u16 vid) |
206 | { | |
207 | if (!vlan_hw_filter_capable(dev, proto)) | |
208 | return 0; | |
209 | ||
210 | if (netif_device_present(dev)) | |
211 | return dev->netdev_ops->ndo_vlan_rx_add_vid(dev, proto, vid); | |
212 | else | |
213 | return -ENODEV; | |
214 | } | |
215 | ||
216 | static int vlan_kill_rx_filter_info(struct net_device *dev, __be16 proto, u16 vid) | |
217 | { | |
218 | if (!vlan_hw_filter_capable(dev, proto)) | |
219 | return 0; | |
220 | ||
221 | if (netif_device_present(dev)) | |
222 | return dev->netdev_ops->ndo_vlan_rx_kill_vid(dev, proto, vid); | |
223 | else | |
224 | return -ENODEV; | |
225 | } | |
226 | ||
960abf68 IK |
227 | int vlan_for_each(struct net_device *dev, |
228 | int (*action)(struct net_device *dev, int vid, void *arg), | |
229 | void *arg) | |
230 | { | |
231 | struct vlan_vid_info *vid_info; | |
232 | struct vlan_info *vlan_info; | |
233 | struct net_device *vdev; | |
234 | int ret; | |
235 | ||
236 | ASSERT_RTNL(); | |
237 | ||
238 | vlan_info = rtnl_dereference(dev->vlan_info); | |
239 | if (!vlan_info) | |
240 | return 0; | |
241 | ||
242 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) { | |
243 | vdev = vlan_group_get_device(&vlan_info->grp, vid_info->proto, | |
244 | vid_info->vid); | |
245 | ret = action(vdev, vid_info->vid, arg); | |
246 | if (ret) | |
247 | return ret; | |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | EXPORT_SYMBOL(vlan_for_each); | |
253 | ||
9daae9bd GP |
254 | int vlan_filter_push_vids(struct vlan_info *vlan_info, __be16 proto) |
255 | { | |
256 | struct net_device *real_dev = vlan_info->real_dev; | |
257 | struct vlan_vid_info *vlan_vid_info; | |
258 | int err; | |
259 | ||
260 | list_for_each_entry(vlan_vid_info, &vlan_info->vid_list, list) { | |
261 | if (vlan_vid_info->proto == proto) { | |
262 | err = vlan_add_rx_filter_info(real_dev, proto, | |
263 | vlan_vid_info->vid); | |
264 | if (err) | |
265 | goto unwind; | |
266 | } | |
267 | } | |
268 | ||
269 | return 0; | |
270 | ||
271 | unwind: | |
272 | list_for_each_entry_continue_reverse(vlan_vid_info, | |
273 | &vlan_info->vid_list, list) { | |
274 | if (vlan_vid_info->proto == proto) | |
275 | vlan_kill_rx_filter_info(real_dev, proto, | |
276 | vlan_vid_info->vid); | |
277 | } | |
278 | ||
279 | return err; | |
280 | } | |
281 | EXPORT_SYMBOL(vlan_filter_push_vids); | |
282 | ||
283 | void vlan_filter_drop_vids(struct vlan_info *vlan_info, __be16 proto) | |
284 | { | |
285 | struct vlan_vid_info *vlan_vid_info; | |
286 | ||
287 | list_for_each_entry(vlan_vid_info, &vlan_info->vid_list, list) | |
288 | if (vlan_vid_info->proto == proto) | |
289 | vlan_kill_rx_filter_info(vlan_info->real_dev, | |
290 | vlan_vid_info->proto, | |
291 | vlan_vid_info->vid); | |
292 | } | |
293 | EXPORT_SYMBOL(vlan_filter_drop_vids); | |
294 | ||
80d5c368 | 295 | static int __vlan_vid_add(struct vlan_info *vlan_info, __be16 proto, u16 vid, |
5b9ea6e0 | 296 | struct vlan_vid_info **pvid_info) |
87002b03 | 297 | { |
5b9ea6e0 | 298 | struct net_device *dev = vlan_info->real_dev; |
5b9ea6e0 JP |
299 | struct vlan_vid_info *vid_info; |
300 | int err; | |
301 | ||
80d5c368 | 302 | vid_info = vlan_vid_info_alloc(proto, vid); |
5b9ea6e0 JP |
303 | if (!vid_info) |
304 | return -ENOMEM; | |
87002b03 | 305 | |
9daae9bd GP |
306 | err = vlan_add_rx_filter_info(dev, proto, vid); |
307 | if (err) { | |
308 | kfree(vid_info); | |
309 | return err; | |
87002b03 | 310 | } |
9daae9bd | 311 | |
5b9ea6e0 JP |
312 | list_add(&vid_info->list, &vlan_info->vid_list); |
313 | vlan_info->nr_vids++; | |
314 | *pvid_info = vid_info; | |
87002b03 JP |
315 | return 0; |
316 | } | |
5b9ea6e0 | 317 | |
80d5c368 | 318 | int vlan_vid_add(struct net_device *dev, __be16 proto, u16 vid) |
5b9ea6e0 JP |
319 | { |
320 | struct vlan_info *vlan_info; | |
321 | struct vlan_vid_info *vid_info; | |
322 | bool vlan_info_created = false; | |
323 | int err; | |
324 | ||
325 | ASSERT_RTNL(); | |
326 | ||
327 | vlan_info = rtnl_dereference(dev->vlan_info); | |
328 | if (!vlan_info) { | |
329 | vlan_info = vlan_info_alloc(dev); | |
330 | if (!vlan_info) | |
331 | return -ENOMEM; | |
332 | vlan_info_created = true; | |
333 | } | |
80d5c368 | 334 | vid_info = vlan_vid_info_get(vlan_info, proto, vid); |
5b9ea6e0 | 335 | if (!vid_info) { |
80d5c368 | 336 | err = __vlan_vid_add(vlan_info, proto, vid, &vid_info); |
5b9ea6e0 JP |
337 | if (err) |
338 | goto out_free_vlan_info; | |
339 | } | |
340 | vid_info->refcount++; | |
341 | ||
342 | if (vlan_info_created) | |
343 | rcu_assign_pointer(dev->vlan_info, vlan_info); | |
344 | ||
345 | return 0; | |
346 | ||
347 | out_free_vlan_info: | |
348 | if (vlan_info_created) | |
349 | kfree(vlan_info); | |
350 | return err; | |
351 | } | |
87002b03 JP |
352 | EXPORT_SYMBOL(vlan_vid_add); |
353 | ||
5b9ea6e0 JP |
354 | static void __vlan_vid_del(struct vlan_info *vlan_info, |
355 | struct vlan_vid_info *vid_info) | |
87002b03 | 356 | { |
5b9ea6e0 | 357 | struct net_device *dev = vlan_info->real_dev; |
80d5c368 PM |
358 | __be16 proto = vid_info->proto; |
359 | u16 vid = vid_info->vid; | |
5b9ea6e0 | 360 | int err; |
87002b03 | 361 | |
9daae9bd | 362 | err = vlan_kill_rx_filter_info(dev, proto, vid); |
bd706ff8 JW |
363 | if (err && dev->reg_state != NETREG_UNREGISTERING) |
364 | netdev_warn(dev, "failed to kill vid %04x/%d\n", proto, vid); | |
9daae9bd | 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) { |
01a564ba LJ |
410 | if (!vlan_hw_filter_capable(by_dev, vid_info->proto)) |
411 | continue; | |
80d5c368 | 412 | err = vlan_vid_add(dev, vid_info->proto, vid_info->vid); |
348a1443 JP |
413 | if (err) |
414 | goto unwind; | |
415 | } | |
416 | return 0; | |
417 | ||
418 | unwind: | |
419 | list_for_each_entry_continue_reverse(vid_info, | |
f9586f79 | 420 | &vlan_info->vid_list, |
348a1443 | 421 | list) { |
01a564ba LJ |
422 | if (!vlan_hw_filter_capable(by_dev, vid_info->proto)) |
423 | continue; | |
80d5c368 | 424 | vlan_vid_del(dev, vid_info->proto, vid_info->vid); |
348a1443 JP |
425 | } |
426 | ||
427 | return err; | |
428 | } | |
429 | EXPORT_SYMBOL(vlan_vids_add_by_dev); | |
430 | ||
431 | void vlan_vids_del_by_dev(struct net_device *dev, | |
432 | const struct net_device *by_dev) | |
433 | { | |
434 | struct vlan_vid_info *vid_info; | |
f9586f79 | 435 | struct vlan_info *vlan_info; |
348a1443 JP |
436 | |
437 | ASSERT_RTNL(); | |
438 | ||
f9586f79 DC |
439 | vlan_info = rtnl_dereference(by_dev->vlan_info); |
440 | if (!vlan_info) | |
348a1443 JP |
441 | return; |
442 | ||
01a564ba LJ |
443 | list_for_each_entry(vid_info, &vlan_info->vid_list, list) { |
444 | if (!vlan_hw_filter_capable(by_dev, vid_info->proto)) | |
445 | continue; | |
80d5c368 | 446 | vlan_vid_del(dev, vid_info->proto, vid_info->vid); |
01a564ba | 447 | } |
348a1443 JP |
448 | } |
449 | EXPORT_SYMBOL(vlan_vids_del_by_dev); | |
9b361c13 JP |
450 | |
451 | bool vlan_uses_dev(const struct net_device *dev) | |
452 | { | |
55462cf3 JP |
453 | struct vlan_info *vlan_info; |
454 | ||
455 | ASSERT_RTNL(); | |
456 | ||
457 | vlan_info = rtnl_dereference(dev->vlan_info); | |
458 | if (!vlan_info) | |
459 | return false; | |
460 | return vlan_info->grp.nr_vlan_devs ? true : false; | |
9b361c13 JP |
461 | } |
462 | EXPORT_SYMBOL(vlan_uses_dev); | |
32764c66 JP |
463 | |
464 | static struct sk_buff *vlan_gro_receive(struct list_head *head, | |
465 | struct sk_buff *skb) | |
466 | { | |
467 | const struct packet_offload *ptype; | |
468 | unsigned int hlen, off_vlan; | |
469 | struct sk_buff *pp = NULL; | |
470 | struct vlan_hdr *vhdr; | |
471 | struct sk_buff *p; | |
472 | __be16 type; | |
473 | int flush = 1; | |
474 | ||
475 | off_vlan = skb_gro_offset(skb); | |
476 | hlen = off_vlan + sizeof(*vhdr); | |
35ffb665 RG |
477 | vhdr = skb_gro_header(skb, hlen, off_vlan); |
478 | if (unlikely(!vhdr)) | |
479 | goto out; | |
32764c66 JP |
480 | |
481 | type = vhdr->h_vlan_encapsulated_proto; | |
482 | ||
32764c66 JP |
483 | ptype = gro_find_receive_by_type(type); |
484 | if (!ptype) | |
fc1ca334 | 485 | goto out; |
32764c66 JP |
486 | |
487 | flush = 0; | |
488 | ||
489 | list_for_each_entry(p, head, list) { | |
490 | struct vlan_hdr *vhdr2; | |
491 | ||
492 | if (!NAPI_GRO_CB(p)->same_flow) | |
493 | continue; | |
494 | ||
495 | vhdr2 = (struct vlan_hdr *)(p->data + off_vlan); | |
496 | if (compare_vlan_header(vhdr, vhdr2)) | |
497 | NAPI_GRO_CB(p)->same_flow = 0; | |
498 | } | |
499 | ||
500 | skb_gro_pull(skb, sizeof(*vhdr)); | |
501 | skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr)); | |
4a6e7ec9 AL |
502 | |
503 | pp = indirect_call_gro_receive_inet(ptype->callbacks.gro_receive, | |
504 | ipv6_gro_receive, inet_gro_receive, | |
505 | head, skb); | |
32764c66 | 506 | |
32764c66 JP |
507 | out: |
508 | skb_gro_flush_final(skb, pp, flush); | |
509 | ||
510 | return pp; | |
511 | } | |
512 | ||
513 | static int vlan_gro_complete(struct sk_buff *skb, int nhoff) | |
514 | { | |
515 | struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff); | |
516 | __be16 type = vhdr->h_vlan_encapsulated_proto; | |
517 | struct packet_offload *ptype; | |
518 | int err = -ENOENT; | |
519 | ||
32764c66 JP |
520 | ptype = gro_find_complete_by_type(type); |
521 | if (ptype) | |
4a6e7ec9 AL |
522 | err = INDIRECT_CALL_INET(ptype->callbacks.gro_complete, |
523 | ipv6_gro_complete, inet_gro_complete, | |
524 | skb, nhoff + sizeof(*vhdr)); | |
32764c66 | 525 | |
32764c66 JP |
526 | return err; |
527 | } | |
528 | ||
529 | static struct packet_offload vlan_packet_offloads[] __read_mostly = { | |
530 | { | |
531 | .type = cpu_to_be16(ETH_P_8021Q), | |
532 | .priority = 10, | |
533 | .callbacks = { | |
534 | .gro_receive = vlan_gro_receive, | |
535 | .gro_complete = vlan_gro_complete, | |
536 | }, | |
537 | }, | |
538 | { | |
539 | .type = cpu_to_be16(ETH_P_8021AD), | |
540 | .priority = 10, | |
541 | .callbacks = { | |
542 | .gro_receive = vlan_gro_receive, | |
543 | .gro_complete = vlan_gro_complete, | |
544 | }, | |
545 | }, | |
546 | }; | |
547 | ||
548 | static int __init vlan_offload_init(void) | |
549 | { | |
550 | unsigned int i; | |
551 | ||
552 | for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) | |
553 | dev_add_offload(&vlan_packet_offloads[i]); | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | fs_initcall(vlan_offload_init); |