fe599798ce3a54a24638786e069faf95fbbd8ef4
[openwrt/openwrt.git] / target / linux / generic / patches-4.4 / 666-Add-support-for-MAP-E-FMRs-mesh-mode.patch
1 From 775d6fe74d1eaec2ba387535b068dde2dc89de9e Mon Sep 17 00:00:00 2001
2 From: Steven Barth <steven@midlink.org>
3 Date: Thu, 22 May 2014 09:49:05 +0200
4 Subject: [PATCH] Add support for MAP-E FMRs (mesh mode)
5
6 MAP-E FMRs (draft-ietf-softwire-map-10) are rules for IPv4-communication
7 between MAP CEs (mesh mode) without the need to forward such data to a
8 border relay. This is similar to how 6rd works but for IPv4 over IPv6.
9
10 Signed-off-by: Steven Barth <cyrus@openwrt.org>
11 ---
12 include/net/ip6_tunnel.h | 13 ++
13 include/uapi/linux/if_tunnel.h | 13 ++
14 net/ipv6/ip6_tunnel.c | 276 +++++++++++++++++++++++++++++++++++++++--
15 3 files changed, 291 insertions(+), 11 deletions(-)
16
17 --- a/include/net/ip6_tunnel.h
18 +++ b/include/net/ip6_tunnel.h
19 @@ -17,6 +17,18 @@
20 /* determine capability on a per-packet basis */
21 #define IP6_TNL_F_CAP_PER_PACKET 0x40000
22
23 +/* IPv6 tunnel FMR */
24 +struct __ip6_tnl_fmr {
25 + struct __ip6_tnl_fmr *next; /* next fmr in list */
26 + struct in6_addr ip6_prefix;
27 + struct in_addr ip4_prefix;
28 +
29 + __u8 ip6_prefix_len;
30 + __u8 ip4_prefix_len;
31 + __u8 ea_len;
32 + __u8 offset;
33 +};
34 +
35 struct __ip6_tnl_parm {
36 char name[IFNAMSIZ]; /* name of tunnel device */
37 int link; /* ifindex of underlying L2 interface */
38 @@ -27,6 +39,7 @@ struct __ip6_tnl_parm {
39 __u32 flags; /* tunnel flags */
40 struct in6_addr laddr; /* local tunnel end-point address */
41 struct in6_addr raddr; /* remote tunnel end-point address */
42 + struct __ip6_tnl_fmr *fmrs; /* FMRs */
43
44 __be16 i_flags;
45 __be16 o_flags;
46 --- a/include/uapi/linux/if_tunnel.h
47 +++ b/include/uapi/linux/if_tunnel.h
48 @@ -57,10 +57,23 @@ enum {
49 IFLA_IPTUN_ENCAP_FLAGS,
50 IFLA_IPTUN_ENCAP_SPORT,
51 IFLA_IPTUN_ENCAP_DPORT,
52 + IFLA_IPTUN_FMRS,
53 __IFLA_IPTUN_MAX,
54 };
55 #define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
56
57 +enum {
58 + IFLA_IPTUN_FMR_UNSPEC,
59 + IFLA_IPTUN_FMR_IP6_PREFIX,
60 + IFLA_IPTUN_FMR_IP4_PREFIX,
61 + IFLA_IPTUN_FMR_IP6_PREFIX_LEN,
62 + IFLA_IPTUN_FMR_IP4_PREFIX_LEN,
63 + IFLA_IPTUN_FMR_EA_LEN,
64 + IFLA_IPTUN_FMR_OFFSET,
65 + __IFLA_IPTUN_FMR_MAX,
66 +};
67 +#define IFLA_IPTUN_FMR_MAX (__IFLA_IPTUN_FMR_MAX - 1)
68 +
69 enum tunnel_encap_types {
70 TUNNEL_ENCAP_NONE,
71 TUNNEL_ENCAP_FOU,
72 --- a/net/ipv6/ip6_tunnel.c
73 +++ b/net/ipv6/ip6_tunnel.c
74 @@ -16,6 +16,8 @@
75 * as published by the Free Software Foundation; either version
76 * 2 of the License, or (at your option) any later version.
77 *
78 + * Changes:
79 + * Steven Barth <cyrus@openwrt.org>: MAP-E FMR support
80 */
81
82 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
83 @@ -71,11 +73,9 @@ static bool log_ecn_error = true;
84 module_param(log_ecn_error, bool, 0644);
85 MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
86
87 -static u32 HASH(const struct in6_addr *addr1, const struct in6_addr *addr2)
88 +static u32 HASH(const struct in6_addr *addr)
89 {
90 - u32 hash = ipv6_addr_hash(addr1) ^ ipv6_addr_hash(addr2);
91 -
92 - return hash_32(hash, HASH_SIZE_SHIFT);
93 + return hash_32(ipv6_addr_hash(addr), HASH_SIZE_SHIFT);
94 }
95
96 static int ip6_tnl_dev_init(struct net_device *dev);
97 @@ -139,20 +139,29 @@ static struct net_device_stats *ip6_get_
98 static struct ip6_tnl *
99 ip6_tnl_lookup(struct net *net, const struct in6_addr *remote, const struct in6_addr *local)
100 {
101 - unsigned int hash = HASH(remote, local);
102 + unsigned int hash = HASH(local);
103 struct ip6_tnl *t;
104 struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
105 struct in6_addr any;
106 + struct __ip6_tnl_fmr *fmr;
107
108 for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) {
109 - if (ipv6_addr_equal(local, &t->parms.laddr) &&
110 - ipv6_addr_equal(remote, &t->parms.raddr) &&
111 - (t->dev->flags & IFF_UP))
112 + if (!ipv6_addr_equal(local, &t->parms.laddr) ||
113 + !(t->dev->flags & IFF_UP))
114 + continue;
115 +
116 + if (ipv6_addr_equal(remote, &t->parms.raddr))
117 return t;
118 +
119 + for (fmr = t->parms.fmrs; fmr; fmr = fmr->next) {
120 + if (ipv6_prefix_equal(remote, &fmr->ip6_prefix,
121 + fmr->ip6_prefix_len))
122 + return t;
123 + }
124 }
125
126 memset(&any, 0, sizeof(any));
127 - hash = HASH(&any, local);
128 + hash = HASH(local);
129 for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) {
130 if (ipv6_addr_equal(local, &t->parms.laddr) &&
131 ipv6_addr_any(&t->parms.raddr) &&
132 @@ -160,7 +169,7 @@ ip6_tnl_lookup(struct net *net, const st
133 return t;
134 }
135
136 - hash = HASH(remote, &any);
137 + hash = HASH(&any);
138 for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) {
139 if (ipv6_addr_equal(remote, &t->parms.raddr) &&
140 ipv6_addr_any(&t->parms.laddr) &&
141 @@ -196,7 +205,7 @@ ip6_tnl_bucket(struct ip6_tnl_net *ip6n,
142
143 if (!ipv6_addr_any(remote) || !ipv6_addr_any(local)) {
144 prio = 1;
145 - h = HASH(remote, local);
146 + h = HASH(local);
147 }
148 return &ip6n->tnls[prio][h];
149 }
150 @@ -369,6 +378,12 @@ ip6_tnl_dev_uninit(struct net_device *de
151 struct net *net = t->net;
152 struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
153
154 + while (t->parms.fmrs) {
155 + struct __ip6_tnl_fmr *next = t->parms.fmrs->next;
156 + kfree(t->parms.fmrs);
157 + t->parms.fmrs = next;
158 + }
159 +
160 if (dev == ip6n->fb_tnl_dev)
161 RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL);
162 else
163 @@ -765,6 +780,108 @@ int ip6_tnl_rcv_ctl(struct ip6_tnl *t,
164 }
165 EXPORT_SYMBOL_GPL(ip6_tnl_rcv_ctl);
166
167 +
168 +/**
169 + * ip4ip6_fmr_calc - calculate target / source IPv6-address based on FMR
170 + * @dest: destination IPv6 address buffer
171 + * @skb: received socket buffer
172 + * @fmr: MAP FMR
173 + * @xmit: Calculate for xmit or rcv
174 + **/
175 +static void ip4ip6_fmr_calc(struct in6_addr *dest,
176 + const struct iphdr *iph, const uint8_t *end,
177 + const struct __ip6_tnl_fmr *fmr, bool xmit)
178 +{
179 + int psidlen = fmr->ea_len - (32 - fmr->ip4_prefix_len);
180 + u8 *portp = NULL;
181 + bool use_dest_addr;
182 + const struct iphdr *dsth = iph;
183 +
184 + if ((u8*)dsth >= end)
185 + return;
186 +
187 + /* find significant IP header */
188 + if (iph->protocol == IPPROTO_ICMP) {
189 + struct icmphdr *ih = (struct icmphdr*)(((u8*)dsth) + dsth->ihl * 4);
190 + if (ih && ((u8*)&ih[1]) <= end && (
191 + ih->type == ICMP_DEST_UNREACH ||
192 + ih->type == ICMP_SOURCE_QUENCH ||
193 + ih->type == ICMP_TIME_EXCEEDED ||
194 + ih->type == ICMP_PARAMETERPROB ||
195 + ih->type == ICMP_REDIRECT))
196 + dsth = (const struct iphdr*)&ih[1];
197 + }
198 +
199 + /* in xmit-path use dest port by default and source port only if
200 + this is an ICMP reply to something else; vice versa in rcv-path */
201 + use_dest_addr = (xmit && dsth == iph) || (!xmit && dsth != iph);
202 +
203 + /* get dst port */
204 + if (((u8*)&dsth[1]) <= end && (
205 + dsth->protocol == IPPROTO_UDP ||
206 + dsth->protocol == IPPROTO_TCP ||
207 + dsth->protocol == IPPROTO_SCTP ||
208 + dsth->protocol == IPPROTO_DCCP)) {
209 + /* for UDP, TCP, SCTP and DCCP source and dest port
210 + follow IPv4 header directly */
211 + portp = ((u8*)dsth) + dsth->ihl * 4;
212 +
213 + if (use_dest_addr)
214 + portp += sizeof(u16);
215 + } else if (iph->protocol == IPPROTO_ICMP) {
216 + struct icmphdr *ih = (struct icmphdr*)(((u8*)dsth) + dsth->ihl * 4);
217 +
218 + /* use icmp identifier as port */
219 + if (((u8*)&ih) <= end && (
220 + (use_dest_addr && (
221 + ih->type == ICMP_ECHOREPLY ||
222 + ih->type == ICMP_TIMESTAMPREPLY ||
223 + ih->type == ICMP_INFO_REPLY ||
224 + ih->type == ICMP_ADDRESSREPLY)) ||
225 + (!use_dest_addr && (
226 + ih->type == ICMP_ECHO ||
227 + ih->type == ICMP_TIMESTAMP ||
228 + ih->type == ICMP_INFO_REQUEST ||
229 + ih->type == ICMP_ADDRESS)
230 + )))
231 + portp = (u8*)&ih->un.echo.id;
232 + }
233 +
234 + if ((portp && &portp[2] <= end) || psidlen == 0) {
235 + int frombyte = fmr->ip6_prefix_len / 8;
236 + int fromrem = fmr->ip6_prefix_len % 8;
237 + int bytes = sizeof(struct in6_addr) - frombyte;
238 + const u32 *addr = (use_dest_addr) ? &iph->daddr : &iph->saddr;
239 + u64 eabits = ((u64)ntohl(*addr)) << (32 + fmr->ip4_prefix_len);
240 + u64 t = 0;
241 +
242 + /* extract PSID from port and add it to eabits */
243 + u16 psidbits = 0;
244 + if (psidlen > 0) {
245 + psidbits = ((u16)portp[0]) << 8 | ((u16)portp[1]);
246 + psidbits >>= 16 - psidlen - fmr->offset;
247 + psidbits = (u16)(psidbits << (16 - psidlen));
248 + eabits |= ((u64)psidbits) << (48 - (fmr->ea_len - psidlen));
249 + }
250 +
251 + /* rewrite destination address */
252 + *dest = fmr->ip6_prefix;
253 + memcpy(&dest->s6_addr[10], addr, sizeof(*addr));
254 + dest->s6_addr16[7] = htons(psidbits >> (16 - psidlen));
255 +
256 + if (bytes > sizeof(u64))
257 + bytes = sizeof(u64);
258 +
259 + /* insert eabits */
260 + memcpy(&t, &dest->s6_addr[frombyte], bytes);
261 + t = be64_to_cpu(t) & ~(((((u64)1) << fmr->ea_len) - 1)
262 + << (64 - fmr->ea_len - fromrem));
263 + t = cpu_to_be64(t | (eabits >> fromrem));
264 + memcpy(&dest->s6_addr[frombyte], &t, bytes);
265 + }
266 +}
267 +
268 +
269 /**
270 * ip6_tnl_rcv - decapsulate IPv6 packet and retransmit it locally
271 * @skb: received socket buffer
272 @@ -810,6 +927,26 @@ static int ip6_tnl_rcv(struct sk_buff *s
273 skb_reset_network_header(skb);
274 skb->protocol = htons(protocol);
275 memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
276 + if (protocol == ETH_P_IP &&
277 + !ipv6_addr_equal(&ipv6h->saddr, &t->parms.raddr)) {
278 + /* Packet didn't come from BR, so lookup FMR */
279 + struct __ip6_tnl_fmr *fmr;
280 + struct in6_addr expected = t->parms.raddr;
281 + for (fmr = t->parms.fmrs; fmr; fmr = fmr->next)
282 + if (ipv6_prefix_equal(&ipv6h->saddr,
283 + &fmr->ip6_prefix, fmr->ip6_prefix_len))
284 + break;
285 +
286 + /* Check that IPv6 matches IPv4 source to prevent spoofing */
287 + if (fmr)
288 + ip4ip6_fmr_calc(&expected, ip_hdr(skb),
289 + skb_tail_pointer(skb), fmr, false);
290 +
291 + if (!ipv6_addr_equal(&ipv6h->saddr, &expected)) {
292 + rcu_read_unlock();
293 + goto discard;
294 + }
295 + }
296
297 __skb_tunnel_rx(skb, t->dev, t->net);
298
299 @@ -1145,6 +1282,7 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, str
300 __u32 mtu;
301 u8 tproto;
302 int err;
303 + struct __ip6_tnl_fmr *fmr;
304
305 tproto = ACCESS_ONCE(t->parms.proto);
306 if ((tproto != IPPROTO_IPV6 && tproto != 0) ||
307 @@ -1175,6 +1313,18 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, str
308 if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
309 fl6.flowi6_mark = skb->mark;
310
311 + /* try to find matching FMR */
312 + for (fmr = t->parms.fmrs; fmr; fmr = fmr->next) {
313 + unsigned mshift = 32 - fmr->ip4_prefix_len;
314 + if (ntohl(fmr->ip4_prefix.s_addr) >> mshift ==
315 + ntohl(ip_hdr(skb)->daddr) >> mshift)
316 + break;
317 + }
318 +
319 + /* change dstaddr according to FMR */
320 + if (fmr)
321 + ip4ip6_fmr_calc(&fl6.daddr, ip_hdr(skb), skb_tail_pointer(skb), fmr, true);
322 +
323 err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu);
324 if (err != 0) {
325 if (err == -EMSGSIZE)
326 @@ -1289,6 +1439,14 @@ ip6_tnl_change(struct ip6_tnl *t, const
327 t->parms.flowinfo = p->flowinfo;
328 t->parms.link = p->link;
329 t->parms.proto = p->proto;
330 +
331 + while (t->parms.fmrs) {
332 + struct __ip6_tnl_fmr *next = t->parms.fmrs->next;
333 + kfree(t->parms.fmrs);
334 + t->parms.fmrs = next;
335 + }
336 + t->parms.fmrs = p->fmrs;
337 +
338 dst_cache_reset(&t->dst_cache);
339 ip6_tnl_link_config(t);
340 return 0;
341 @@ -1327,6 +1485,7 @@ ip6_tnl_parm_from_user(struct __ip6_tnl_
342 p->flowinfo = u->flowinfo;
343 p->link = u->link;
344 p->proto = u->proto;
345 + p->fmrs = NULL;
346 memcpy(p->name, u->name, sizeof(u->name));
347 }
348
349 @@ -1622,6 +1781,15 @@ static int ip6_tnl_validate(struct nlatt
350 return 0;
351 }
352
353 +static const struct nla_policy ip6_tnl_fmr_policy[IFLA_IPTUN_FMR_MAX + 1] = {
354 + [IFLA_IPTUN_FMR_IP6_PREFIX] = { .len = sizeof(struct in6_addr) },
355 + [IFLA_IPTUN_FMR_IP4_PREFIX] = { .len = sizeof(struct in_addr) },
356 + [IFLA_IPTUN_FMR_IP6_PREFIX_LEN] = { .type = NLA_U8 },
357 + [IFLA_IPTUN_FMR_IP4_PREFIX_LEN] = { .type = NLA_U8 },
358 + [IFLA_IPTUN_FMR_EA_LEN] = { .type = NLA_U8 },
359 + [IFLA_IPTUN_FMR_OFFSET] = { .type = NLA_U8 }
360 +};
361 +
362 static void ip6_tnl_netlink_parms(struct nlattr *data[],
363 struct __ip6_tnl_parm *parms)
364 {
365 @@ -1653,6 +1821,46 @@ static void ip6_tnl_netlink_parms(struct
366
367 if (data[IFLA_IPTUN_PROTO])
368 parms->proto = nla_get_u8(data[IFLA_IPTUN_PROTO]);
369 +
370 + if (data[IFLA_IPTUN_FMRS]) {
371 + unsigned rem;
372 + struct nlattr *fmr;
373 + nla_for_each_nested(fmr, data[IFLA_IPTUN_FMRS], rem) {
374 + struct nlattr *fmrd[IFLA_IPTUN_FMR_MAX + 1], *c;
375 + struct __ip6_tnl_fmr *nfmr;
376 +
377 + nla_parse_nested(fmrd, IFLA_IPTUN_FMR_MAX,
378 + fmr, ip6_tnl_fmr_policy);
379 +
380 + if (!(nfmr = kzalloc(sizeof(*nfmr), GFP_KERNEL)))
381 + continue;
382 +
383 + nfmr->offset = 6;
384 +
385 + if ((c = fmrd[IFLA_IPTUN_FMR_IP6_PREFIX]))
386 + nla_memcpy(&nfmr->ip6_prefix, fmrd[IFLA_IPTUN_FMR_IP6_PREFIX],
387 + sizeof(nfmr->ip6_prefix));
388 +
389 + if ((c = fmrd[IFLA_IPTUN_FMR_IP4_PREFIX]))
390 + nla_memcpy(&nfmr->ip4_prefix, fmrd[IFLA_IPTUN_FMR_IP4_PREFIX],
391 + sizeof(nfmr->ip4_prefix));
392 +
393 + if ((c = fmrd[IFLA_IPTUN_FMR_IP6_PREFIX_LEN]))
394 + nfmr->ip6_prefix_len = nla_get_u8(c);
395 +
396 + if ((c = fmrd[IFLA_IPTUN_FMR_IP4_PREFIX_LEN]))
397 + nfmr->ip4_prefix_len = nla_get_u8(c);
398 +
399 + if ((c = fmrd[IFLA_IPTUN_FMR_EA_LEN]))
400 + nfmr->ea_len = nla_get_u8(c);
401 +
402 + if ((c = fmrd[IFLA_IPTUN_FMR_OFFSET]))
403 + nfmr->offset = nla_get_u8(c);
404 +
405 + nfmr->next = parms->fmrs;
406 + parms->fmrs = nfmr;
407 + }
408 + }
409 }
410
411 static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev,
412 @@ -1705,6 +1913,12 @@ static void ip6_tnl_dellink(struct net_d
413
414 static size_t ip6_tnl_get_size(const struct net_device *dev)
415 {
416 + const struct ip6_tnl *t = netdev_priv(dev);
417 + struct __ip6_tnl_fmr *c;
418 + int fmrs = 0;
419 + for (c = t->parms.fmrs; c; c = c->next)
420 + ++fmrs;
421 +
422 return
423 /* IFLA_IPTUN_LINK */
424 nla_total_size(4) +
425 @@ -1722,6 +1936,24 @@ static size_t ip6_tnl_get_size(const str
426 nla_total_size(4) +
427 /* IFLA_IPTUN_PROTO */
428 nla_total_size(1) +
429 + /* IFLA_IPTUN_FMRS */
430 + nla_total_size(0) +
431 + (
432 + /* nest */
433 + nla_total_size(0) +
434 + /* IFLA_IPTUN_FMR_IP6_PREFIX */
435 + nla_total_size(sizeof(struct in6_addr)) +
436 + /* IFLA_IPTUN_FMR_IP4_PREFIX */
437 + nla_total_size(sizeof(struct in_addr)) +
438 + /* IFLA_IPTUN_FMR_EA_LEN */
439 + nla_total_size(1) +
440 + /* IFLA_IPTUN_FMR_IP6_PREFIX_LEN */
441 + nla_total_size(1) +
442 + /* IFLA_IPTUN_FMR_IP4_PREFIX_LEN */
443 + nla_total_size(1) +
444 + /* IFLA_IPTUN_FMR_OFFSET */
445 + nla_total_size(1)
446 + ) * fmrs +
447 0;
448 }
449
450 @@ -1729,6 +1961,9 @@ static int ip6_tnl_fill_info(struct sk_b
451 {
452 struct ip6_tnl *tunnel = netdev_priv(dev);
453 struct __ip6_tnl_parm *parm = &tunnel->parms;
454 + struct __ip6_tnl_fmr *c;
455 + int fmrcnt = 0;
456 + struct nlattr *fmrs;
457
458 if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) ||
459 nla_put_in6_addr(skb, IFLA_IPTUN_LOCAL, &parm->laddr) ||
460 @@ -1737,8 +1972,27 @@ static int ip6_tnl_fill_info(struct sk_b
461 nla_put_u8(skb, IFLA_IPTUN_ENCAP_LIMIT, parm->encap_limit) ||
462 nla_put_be32(skb, IFLA_IPTUN_FLOWINFO, parm->flowinfo) ||
463 nla_put_u32(skb, IFLA_IPTUN_FLAGS, parm->flags) ||
464 - nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto))
465 + nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto) ||
466 + !(fmrs = nla_nest_start(skb, IFLA_IPTUN_FMRS)))
467 goto nla_put_failure;
468 +
469 + for (c = parm->fmrs; c; c = c->next) {
470 + struct nlattr *fmr = nla_nest_start(skb, ++fmrcnt);
471 + if (!fmr ||
472 + nla_put(skb, IFLA_IPTUN_FMR_IP6_PREFIX,
473 + sizeof(c->ip6_prefix), &c->ip6_prefix) ||
474 + nla_put(skb, IFLA_IPTUN_FMR_IP4_PREFIX,
475 + sizeof(c->ip4_prefix), &c->ip4_prefix) ||
476 + nla_put_u8(skb, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, c->ip6_prefix_len) ||
477 + nla_put_u8(skb, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, c->ip4_prefix_len) ||
478 + nla_put_u8(skb, IFLA_IPTUN_FMR_EA_LEN, c->ea_len) ||
479 + nla_put_u8(skb, IFLA_IPTUN_FMR_OFFSET, c->offset))
480 + goto nla_put_failure;
481 +
482 + nla_nest_end(skb, fmr);
483 + }
484 + nla_nest_end(skb, fmrs);
485 +
486 return 0;
487
488 nla_put_failure:
489 @@ -1762,6 +2016,7 @@ static const struct nla_policy ip6_tnl_p
490 [IFLA_IPTUN_FLOWINFO] = { .type = NLA_U32 },
491 [IFLA_IPTUN_FLAGS] = { .type = NLA_U32 },
492 [IFLA_IPTUN_PROTO] = { .type = NLA_U8 },
493 + [IFLA_IPTUN_FMRS] = { .type = NLA_NESTED },
494 };
495
496 static struct rtnl_link_ops ip6_link_ops __read_mostly = {