Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d1da932e VY |
2 | /* |
3 | * IPV6 GSO/GRO offload support | |
4 | * Linux INET6 implementation | |
d1da932e VY |
5 | */ |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/socket.h> | |
9 | #include <linux/netdevice.h> | |
10 | #include <linux/skbuff.h> | |
c6b641a4 | 11 | #include <linux/printk.h> |
d1da932e VY |
12 | |
13 | #include <net/protocol.h> | |
14 | #include <net/ipv6.h> | |
b8921ca8 | 15 | #include <net/inet_common.h> |
5521d95e | 16 | #include <net/tcp.h> |
6db69328 | 17 | #include <net/udp.h> |
04f00ab2 | 18 | #include <net/gro.h> |
d457a0e3 | 19 | #include <net/gso.h> |
d1da932e VY |
20 | |
21 | #include "ip6_offload.h" | |
22 | ||
028e0a47 PA |
23 | /* All GRO functions are always builtin, except UDP over ipv6, which lays in |
24 | * ipv6 module, as it depends on UDPv6 lookup function, so we need special care | |
25 | * when ipv6 is built as a module | |
26 | */ | |
27 | #if IS_BUILTIN(CONFIG_IPV6) | |
28 | #define INDIRECT_CALL_L4(f, f2, f1, ...) INDIRECT_CALL_2(f, f2, f1, __VA_ARGS__) | |
29 | #else | |
30 | #define INDIRECT_CALL_L4(f, f2, f1, ...) INDIRECT_CALL_1(f, f2, __VA_ARGS__) | |
31 | #endif | |
32 | ||
33 | #define indirect_call_gro_receive_l4(f2, f1, cb, head, skb) \ | |
34 | ({ \ | |
35 | unlikely(gro_recursion_inc_test(skb)) ? \ | |
36 | NAPI_GRO_CB(skb)->flush |= 1, NULL : \ | |
37 | INDIRECT_CALL_L4(cb, f2, f1, head, skb); \ | |
38 | }) | |
39 | ||
d1da932e VY |
40 | static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto) |
41 | { | |
42 | const struct net_offload *ops = NULL; | |
43 | ||
44 | for (;;) { | |
45 | struct ipv6_opt_hdr *opth; | |
46 | int len; | |
47 | ||
48 | if (proto != NEXTHDR_HOP) { | |
49 | ops = rcu_dereference(inet6_offloads[proto]); | |
50 | ||
51 | if (unlikely(!ops)) | |
52 | break; | |
53 | ||
54 | if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) | |
55 | break; | |
56 | } | |
57 | ||
58 | if (unlikely(!pskb_may_pull(skb, 8))) | |
59 | break; | |
60 | ||
61 | opth = (void *)skb->data; | |
62 | len = ipv6_optlen(opth); | |
63 | ||
64 | if (unlikely(!pskb_may_pull(skb, len))) | |
65 | break; | |
66 | ||
fc6fb41c | 67 | opth = (void *)skb->data; |
d1da932e VY |
68 | proto = opth->nexthdr; |
69 | __skb_pull(skb, len); | |
70 | } | |
71 | ||
72 | return proto; | |
73 | } | |
74 | ||
d1da932e VY |
75 | static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, |
76 | netdev_features_t features) | |
77 | { | |
78 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
79 | struct ipv6hdr *ipv6h; | |
80 | const struct net_offload *ops; | |
89300468 | 81 | int proto, err; |
d1da932e | 82 | struct frag_hdr *fptr; |
802ab55a | 83 | unsigned int payload_len; |
d1da932e VY |
84 | u8 *prevhdr; |
85 | int offset = 0; | |
91a48a2e | 86 | bool encap, udpfrag; |
d3e5e006 | 87 | int nhoff; |
07b26c94 | 88 | bool gso_partial; |
d1da932e | 89 | |
d3e5e006 | 90 | skb_reset_network_header(skb); |
89300468 CL |
91 | err = ipv6_hopopt_jumbo_remove(skb); |
92 | if (err) | |
93 | return ERR_PTR(err); | |
d3e5e006 | 94 | nhoff = skb_network_header(skb) - skb_mac_header(skb); |
d1da932e VY |
95 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) |
96 | goto out; | |
97 | ||
91a48a2e HFS |
98 | encap = SKB_GSO_CB(skb)->encap_level > 0; |
99 | if (encap) | |
1e16aa3d | 100 | features &= skb->dev->hw_enc_features; |
d3e5e006 ED |
101 | SKB_GSO_CB(skb)->encap_level += sizeof(*ipv6h); |
102 | ||
d1da932e VY |
103 | ipv6h = ipv6_hdr(skb); |
104 | __skb_pull(skb, sizeof(*ipv6h)); | |
105 | segs = ERR_PTR(-EPROTONOSUPPORT); | |
106 | ||
107 | proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); | |
b917eb15 | 108 | |
91a48a2e | 109 | if (skb->encapsulation && |
7e13318d | 110 | skb_shinfo(skb)->gso_type & (SKB_GSO_IPXIP4 | SKB_GSO_IPXIP6)) |
ee80d1eb WB |
111 | udpfrag = proto == IPPROTO_UDP && encap && |
112 | (skb_shinfo(skb)->gso_type & SKB_GSO_UDP); | |
91a48a2e | 113 | else |
ee80d1eb WB |
114 | udpfrag = proto == IPPROTO_UDP && !skb->encapsulation && |
115 | (skb_shinfo(skb)->gso_type & SKB_GSO_UDP); | |
91a48a2e | 116 | |
d1da932e | 117 | ops = rcu_dereference(inet6_offloads[proto]); |
f191a1d1 | 118 | if (likely(ops && ops->callbacks.gso_segment)) { |
d1da932e | 119 | skb_reset_transport_header(skb); |
f191a1d1 | 120 | segs = ops->callbacks.gso_segment(skb, features); |
cc20cced TL |
121 | if (!segs) |
122 | skb->network_header = skb_mac_header(skb) + nhoff - skb->head; | |
d1da932e | 123 | } |
d1da932e | 124 | |
6b6ebb6b | 125 | if (IS_ERR_OR_NULL(segs)) |
d1da932e VY |
126 | goto out; |
127 | ||
07b26c94 SK |
128 | gso_partial = !!(skb_shinfo(segs)->gso_type & SKB_GSO_PARTIAL); |
129 | ||
d1da932e | 130 | for (skb = segs; skb; skb = skb->next) { |
d3e5e006 | 131 | ipv6h = (struct ipv6hdr *)(skb_mac_header(skb) + nhoff); |
3d0241d5 | 132 | if (gso_partial && skb_is_gso(skb)) |
802ab55a AD |
133 | payload_len = skb_shinfo(skb)->gso_size + |
134 | SKB_GSO_CB(skb)->data_offset + | |
135 | skb->head - (unsigned char *)(ipv6h + 1); | |
136 | else | |
137 | payload_len = skb->len - nhoff - sizeof(*ipv6h); | |
138 | ipv6h->payload_len = htons(payload_len); | |
d3e5e006 | 139 | skb->network_header = (u8 *)ipv6h - skb->head; |
c56cae23 | 140 | skb_reset_mac_len(skb); |
d3e5e006 | 141 | |
91a48a2e | 142 | if (udpfrag) { |
7dd7eb95 | 143 | int err = ip6_find_1stfragopt(skb, &prevhdr); |
e3e86b51 DM |
144 | if (err < 0) { |
145 | kfree_skb_list(segs); | |
7dd7eb95 | 146 | return ERR_PTR(err); |
e3e86b51 | 147 | } |
7dd7eb95 | 148 | fptr = (struct frag_hdr *)((u8 *)ipv6h + err); |
d1da932e | 149 | fptr->frag_off = htons(offset); |
53b24b8f | 150 | if (skb->next) |
d1da932e VY |
151 | fptr->frag_off |= htons(IP6_MF); |
152 | offset += (ntohs(ipv6h->payload_len) - | |
153 | sizeof(struct frag_hdr)); | |
154 | } | |
91a48a2e HFS |
155 | if (encap) |
156 | skb_reset_inner_headers(skb); | |
d1da932e VY |
157 | } |
158 | ||
159 | out: | |
160 | return segs; | |
161 | } | |
162 | ||
299603e8 JC |
163 | /* Return the total length of all the extension hdrs, following the same |
164 | * logic in ipv6_gso_pull_exthdrs() when parsing ext-hdrs. | |
165 | */ | |
166 | static int ipv6_exthdrs_len(struct ipv6hdr *iph, | |
167 | const struct net_offload **opps) | |
168 | { | |
810c23a3 JC |
169 | struct ipv6_opt_hdr *opth = (void *)iph; |
170 | int len = 0, proto, optlen = sizeof(*iph); | |
299603e8 JC |
171 | |
172 | proto = iph->nexthdr; | |
173 | for (;;) { | |
174 | if (proto != NEXTHDR_HOP) { | |
175 | *opps = rcu_dereference(inet6_offloads[proto]); | |
176 | if (unlikely(!(*opps))) | |
177 | break; | |
178 | if (!((*opps)->flags & INET6_PROTO_GSO_EXTHDR)) | |
179 | break; | |
180 | } | |
810c23a3 JC |
181 | opth = (void *)opth + optlen; |
182 | optlen = ipv6_optlen(opth); | |
299603e8 JC |
183 | len += optlen; |
184 | proto = opth->nexthdr; | |
185 | } | |
186 | return len; | |
187 | } | |
188 | ||
aaa5d90b PA |
189 | INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head, |
190 | struct sk_buff *skb) | |
d1da932e VY |
191 | { |
192 | const struct net_offload *ops; | |
d4546c25 | 193 | struct sk_buff *pp = NULL; |
d1da932e VY |
194 | struct sk_buff *p; |
195 | struct ipv6hdr *iph; | |
196 | unsigned int nlen; | |
197 | unsigned int hlen; | |
198 | unsigned int off; | |
bf5a755f | 199 | u16 flush = 1; |
d1da932e | 200 | int proto; |
d1da932e VY |
201 | |
202 | off = skb_gro_offset(skb); | |
203 | hlen = off + sizeof(*iph); | |
cb628a9a | 204 | iph = skb_gro_header(skb, hlen, off); |
35ffb665 RG |
205 | if (unlikely(!iph)) |
206 | goto out; | |
d1da932e | 207 | |
299603e8 | 208 | skb_set_network_header(skb, off); |
d1da932e VY |
209 | skb_gro_pull(skb, sizeof(*iph)); |
210 | skb_set_transport_header(skb, skb_gro_offset(skb)); | |
211 | ||
212 | flush += ntohs(iph->payload_len) != skb_gro_len(skb); | |
213 | ||
d1da932e VY |
214 | proto = iph->nexthdr; |
215 | ops = rcu_dereference(inet6_offloads[proto]); | |
f191a1d1 | 216 | if (!ops || !ops->callbacks.gro_receive) { |
d427c899 | 217 | pskb_pull(skb, skb_gro_offset(skb)); |
57ea52a8 | 218 | skb_gro_frag0_invalidate(skb); |
d1da932e VY |
219 | proto = ipv6_gso_pull_exthdrs(skb, proto); |
220 | skb_gro_pull(skb, -skb_transport_offset(skb)); | |
221 | skb_reset_transport_header(skb); | |
222 | __skb_push(skb, skb_gro_offset(skb)); | |
223 | ||
224 | ops = rcu_dereference(inet6_offloads[proto]); | |
f191a1d1 | 225 | if (!ops || !ops->callbacks.gro_receive) |
fc1ca334 | 226 | goto out; |
d1da932e VY |
227 | |
228 | iph = ipv6_hdr(skb); | |
229 | } | |
230 | ||
231 | NAPI_GRO_CB(skb)->proto = proto; | |
232 | ||
233 | flush--; | |
234 | nlen = skb_network_header_len(skb); | |
235 | ||
d4546c25 | 236 | list_for_each_entry(p, head, list) { |
d1da932e VY |
237 | const struct ipv6hdr *iph2; |
238 | __be32 first_word; /* <Version:4><Traffic_Class:8><Flow_Label:20> */ | |
239 | ||
240 | if (!NAPI_GRO_CB(p)->same_flow) | |
241 | continue; | |
242 | ||
299603e8 | 243 | iph2 = (struct ipv6hdr *)(p->data + off); |
67ba4152 | 244 | first_word = *(__be32 *)iph ^ *(__be32 *)iph2; |
d1da932e | 245 | |
299603e8 JC |
246 | /* All fields must match except length and Traffic Class. |
247 | * XXX skbs on the gro_list have all been parsed and pulled | |
248 | * already so we don't need to compare nlen | |
249 | * (nlen != (sizeof(*iph2) + ipv6_exthdrs_len(iph2, &ops))) | |
0b215b97 | 250 | * memcmp() alone below is sufficient, right? |
299603e8 JC |
251 | */ |
252 | if ((first_word & htonl(0xF00FFFFF)) || | |
1ebb87cc JC |
253 | !ipv6_addr_equal(&iph->saddr, &iph2->saddr) || |
254 | !ipv6_addr_equal(&iph->daddr, &iph2->daddr) || | |
6fc2f383 | 255 | iph->nexthdr != iph2->nexthdr) { |
0b215b97 | 256 | not_same_flow: |
d1da932e VY |
257 | NAPI_GRO_CB(p)->same_flow = 0; |
258 | continue; | |
259 | } | |
0b215b97 ED |
260 | if (unlikely(nlen > sizeof(struct ipv6hdr))) { |
261 | if (memcmp(iph + 1, iph2 + 1, | |
262 | nlen - sizeof(struct ipv6hdr))) | |
263 | goto not_same_flow; | |
264 | } | |
d1da932e | 265 | /* flush if Traffic Class fields are different */ |
6fc2f383 JK |
266 | NAPI_GRO_CB(p)->flush |= !!((first_word & htonl(0x0FF00000)) | |
267 | (__force __be32)(iph->hop_limit ^ iph2->hop_limit)); | |
d1da932e | 268 | NAPI_GRO_CB(p)->flush |= flush; |
03d56daa | 269 | |
1530545e AD |
270 | /* If the previous IP ID value was based on an atomic |
271 | * datagram we can overwrite the value and ignore it. | |
272 | */ | |
273 | if (NAPI_GRO_CB(skb)->is_atomic) | |
274 | NAPI_GRO_CB(p)->flush_id = 0; | |
d1da932e VY |
275 | } |
276 | ||
1530545e | 277 | NAPI_GRO_CB(skb)->is_atomic = true; |
d1da932e VY |
278 | NAPI_GRO_CB(skb)->flush |= flush; |
279 | ||
4de462ab | 280 | skb_gro_postpull_rcsum(skb, iph, nlen); |
d1da932e | 281 | |
028e0a47 PA |
282 | pp = indirect_call_gro_receive_l4(tcp6_gro_receive, udp6_gro_receive, |
283 | ops->callbacks.gro_receive, head, skb); | |
d1da932e | 284 | |
d1da932e | 285 | out: |
5f114163 | 286 | skb_gro_flush_final(skb, pp, flush); |
d1da932e VY |
287 | |
288 | return pp; | |
289 | } | |
290 | ||
d4546c25 DM |
291 | static struct sk_buff *sit_ip6ip6_gro_receive(struct list_head *head, |
292 | struct sk_buff *skb) | |
fac8e0f5 | 293 | { |
815d22e5 TH |
294 | /* Common GRO receive for SIT and IP6IP6 */ |
295 | ||
fac8e0f5 JG |
296 | if (NAPI_GRO_CB(skb)->encap_mark) { |
297 | NAPI_GRO_CB(skb)->flush = 1; | |
298 | return NULL; | |
299 | } | |
300 | ||
301 | NAPI_GRO_CB(skb)->encap_mark = 1; | |
302 | ||
303 | return ipv6_gro_receive(head, skb); | |
304 | } | |
305 | ||
d4546c25 DM |
306 | static struct sk_buff *ip4ip6_gro_receive(struct list_head *head, |
307 | struct sk_buff *skb) | |
b8921ca8 TH |
308 | { |
309 | /* Common GRO receive for SIT and IP6IP6 */ | |
310 | ||
311 | if (NAPI_GRO_CB(skb)->encap_mark) { | |
312 | NAPI_GRO_CB(skb)->flush = 1; | |
313 | return NULL; | |
314 | } | |
315 | ||
316 | NAPI_GRO_CB(skb)->encap_mark = 1; | |
317 | ||
318 | return inet_gro_receive(head, skb); | |
319 | } | |
320 | ||
aaa5d90b | 321 | INDIRECT_CALLABLE_SCOPE int ipv6_gro_complete(struct sk_buff *skb, int nhoff) |
d1da932e VY |
322 | { |
323 | const struct net_offload *ops; | |
81fbc812 | 324 | struct ipv6hdr *iph; |
d1da932e | 325 | int err = -ENOSYS; |
81fbc812 | 326 | u32 payload_len; |
d1da932e | 327 | |
294acf1c PA |
328 | if (skb->encapsulation) { |
329 | skb_set_inner_protocol(skb, cpu_to_be16(ETH_P_IPV6)); | |
feec0cb3 | 330 | skb_set_inner_network_header(skb, nhoff); |
294acf1c | 331 | } |
feec0cb3 | 332 | |
81fbc812 ED |
333 | payload_len = skb->len - nhoff - sizeof(*iph); |
334 | if (unlikely(payload_len > IPV6_MAXPLEN)) { | |
335 | struct hop_jumbo_hdr *hop_jumbo; | |
336 | int hoplen = sizeof(*hop_jumbo); | |
337 | ||
338 | /* Move network header left */ | |
339 | memmove(skb_mac_header(skb) - hoplen, skb_mac_header(skb), | |
340 | skb->transport_header - skb->mac_header); | |
341 | skb->data -= hoplen; | |
342 | skb->len += hoplen; | |
343 | skb->mac_header -= hoplen; | |
344 | skb->network_header -= hoplen; | |
345 | iph = (struct ipv6hdr *)(skb->data + nhoff); | |
346 | hop_jumbo = (struct hop_jumbo_hdr *)(iph + 1); | |
347 | ||
348 | /* Build hop-by-hop options */ | |
349 | hop_jumbo->nexthdr = iph->nexthdr; | |
350 | hop_jumbo->hdrlen = 0; | |
351 | hop_jumbo->tlv_type = IPV6_TLV_JUMBO; | |
352 | hop_jumbo->tlv_len = 4; | |
353 | hop_jumbo->jumbo_payload_len = htonl(payload_len + hoplen); | |
354 | ||
355 | iph->nexthdr = NEXTHDR_HOP; | |
356 | iph->payload_len = 0; | |
357 | } else { | |
358 | iph = (struct ipv6hdr *)(skb->data + nhoff); | |
359 | iph->payload_len = htons(payload_len); | |
360 | } | |
d1da932e | 361 | |
299603e8 | 362 | nhoff += sizeof(*iph) + ipv6_exthdrs_len(iph, &ops); |
f191a1d1 | 363 | if (WARN_ON(!ops || !ops->callbacks.gro_complete)) |
627b94f7 | 364 | goto out; |
d1da932e | 365 | |
028e0a47 PA |
366 | err = INDIRECT_CALL_L4(ops->callbacks.gro_complete, tcp6_gro_complete, |
367 | udp6_gro_complete, skb, nhoff); | |
d1da932e | 368 | |
627b94f7 | 369 | out: |
d1da932e VY |
370 | return err; |
371 | } | |
372 | ||
feec0cb3 ED |
373 | static int sit_gro_complete(struct sk_buff *skb, int nhoff) |
374 | { | |
375 | skb->encapsulation = 1; | |
7e13318d | 376 | skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP4; |
feec0cb3 ED |
377 | return ipv6_gro_complete(skb, nhoff); |
378 | } | |
379 | ||
815d22e5 TH |
380 | static int ip6ip6_gro_complete(struct sk_buff *skb, int nhoff) |
381 | { | |
382 | skb->encapsulation = 1; | |
383 | skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP6; | |
384 | return ipv6_gro_complete(skb, nhoff); | |
385 | } | |
386 | ||
b8921ca8 TH |
387 | static int ip4ip6_gro_complete(struct sk_buff *skb, int nhoff) |
388 | { | |
389 | skb->encapsulation = 1; | |
390 | skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP6; | |
391 | return inet_gro_complete(skb, nhoff); | |
392 | } | |
393 | ||
d1da932e VY |
394 | static struct packet_offload ipv6_packet_offload __read_mostly = { |
395 | .type = cpu_to_be16(ETH_P_IPV6), | |
f191a1d1 | 396 | .callbacks = { |
f191a1d1 VY |
397 | .gso_segment = ipv6_gso_segment, |
398 | .gro_receive = ipv6_gro_receive, | |
399 | .gro_complete = ipv6_gro_complete, | |
400 | }, | |
d1da932e VY |
401 | }; |
402 | ||
418e897e WB |
403 | static struct sk_buff *sit_gso_segment(struct sk_buff *skb, |
404 | netdev_features_t features) | |
405 | { | |
406 | if (!(skb_shinfo(skb)->gso_type & SKB_GSO_IPXIP4)) | |
407 | return ERR_PTR(-EINVAL); | |
408 | ||
409 | return ipv6_gso_segment(skb, features); | |
410 | } | |
411 | ||
412 | static struct sk_buff *ip4ip6_gso_segment(struct sk_buff *skb, | |
413 | netdev_features_t features) | |
414 | { | |
415 | if (!(skb_shinfo(skb)->gso_type & SKB_GSO_IPXIP6)) | |
416 | return ERR_PTR(-EINVAL); | |
417 | ||
418 | return inet_gso_segment(skb, features); | |
419 | } | |
420 | ||
421 | static struct sk_buff *ip6ip6_gso_segment(struct sk_buff *skb, | |
422 | netdev_features_t features) | |
423 | { | |
424 | if (!(skb_shinfo(skb)->gso_type & SKB_GSO_IPXIP6)) | |
425 | return ERR_PTR(-EINVAL); | |
426 | ||
427 | return ipv6_gso_segment(skb, features); | |
428 | } | |
429 | ||
61c1db7f ED |
430 | static const struct net_offload sit_offload = { |
431 | .callbacks = { | |
418e897e | 432 | .gso_segment = sit_gso_segment, |
815d22e5 | 433 | .gro_receive = sit_ip6ip6_gro_receive, |
feec0cb3 | 434 | .gro_complete = sit_gro_complete, |
61c1db7f ED |
435 | }, |
436 | }; | |
437 | ||
b8921ca8 TH |
438 | static const struct net_offload ip4ip6_offload = { |
439 | .callbacks = { | |
418e897e | 440 | .gso_segment = ip4ip6_gso_segment, |
b8921ca8 TH |
441 | .gro_receive = ip4ip6_gro_receive, |
442 | .gro_complete = ip4ip6_gro_complete, | |
443 | }, | |
444 | }; | |
445 | ||
815d22e5 TH |
446 | static const struct net_offload ip6ip6_offload = { |
447 | .callbacks = { | |
418e897e | 448 | .gso_segment = ip6ip6_gso_segment, |
815d22e5 TH |
449 | .gro_receive = sit_ip6ip6_gro_receive, |
450 | .gro_complete = ip6ip6_gro_complete, | |
451 | }, | |
452 | }; | |
c6b641a4 | 453 | static int __init ipv6_offload_init(void) |
d1da932e | 454 | { |
c6b641a4 VY |
455 | |
456 | if (tcpv6_offload_init() < 0) | |
457 | pr_crit("%s: Cannot add TCP protocol offload\n", __func__); | |
c6b641a4 VY |
458 | if (ipv6_exthdrs_offload_init() < 0) |
459 | pr_crit("%s: Cannot add EXTHDRS protocol offload\n", __func__); | |
460 | ||
d1da932e | 461 | dev_add_offload(&ipv6_packet_offload); |
61c1db7f ED |
462 | |
463 | inet_add_offload(&sit_offload, IPPROTO_IPV6); | |
815d22e5 | 464 | inet6_add_offload(&ip6ip6_offload, IPPROTO_IPV6); |
b8921ca8 | 465 | inet6_add_offload(&ip4ip6_offload, IPPROTO_IPIP); |
61c1db7f | 466 | |
c6b641a4 | 467 | return 0; |
d1da932e VY |
468 | } |
469 | ||
c6b641a4 | 470 | fs_initcall(ipv6_offload_init); |