Commit | Line | Data |
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0189197f EB |
1 | #include <linux/types.h> |
2 | #include <linux/skbuff.h> | |
3 | #include <linux/socket.h> | |
7720c01f | 4 | #include <linux/sysctl.h> |
0189197f EB |
5 | #include <linux/net.h> |
6 | #include <linux/module.h> | |
7 | #include <linux/if_arp.h> | |
8 | #include <linux/ipv6.h> | |
9 | #include <linux/mpls.h> | |
24045a03 | 10 | #include <linux/netconf.h> |
4b5edb2f | 11 | #include <linux/vmalloc.h> |
27d69105 | 12 | #include <linux/percpu.h> |
0189197f EB |
13 | #include <net/ip.h> |
14 | #include <net/dst.h> | |
15 | #include <net/sock.h> | |
16 | #include <net/arp.h> | |
17 | #include <net/ip_fib.h> | |
18 | #include <net/netevent.h> | |
19 | #include <net/netns/generic.h> | |
bf21563a RP |
20 | #if IS_ENABLED(CONFIG_IPV6) |
21 | #include <net/ipv6.h> | |
bf21563a | 22 | #endif |
27d69105 | 23 | #include <net/addrconf.h> |
f8efb73c | 24 | #include <net/nexthop.h> |
0189197f EB |
25 | #include "internal.h" |
26 | ||
1c78efa8 RS |
27 | /* Maximum number of labels to look ahead at when selecting a path of |
28 | * a multipath route | |
29 | */ | |
30 | #define MAX_MP_SELECT_LABELS 4 | |
31 | ||
eb7809f0 RS |
32 | #define MPLS_NEIGH_TABLE_UNSPEC (NEIGH_LINK_TABLE + 1) |
33 | ||
7720c01f EB |
34 | static int zero = 0; |
35 | static int label_limit = (1 << 20) - 1; | |
36 | ||
8de147dc EB |
37 | static void rtmsg_lfib(int event, u32 label, struct mpls_route *rt, |
38 | struct nlmsghdr *nlh, struct net *net, u32 portid, | |
39 | unsigned int nlm_flags); | |
40 | ||
0189197f EB |
41 | static struct mpls_route *mpls_route_input_rcu(struct net *net, unsigned index) |
42 | { | |
43 | struct mpls_route *rt = NULL; | |
44 | ||
45 | if (index < net->mpls.platform_labels) { | |
46 | struct mpls_route __rcu **platform_label = | |
47 | rcu_dereference(net->mpls.platform_label); | |
48 | rt = rcu_dereference(platform_label[index]); | |
49 | } | |
50 | return rt; | |
51 | } | |
52 | ||
face0188 | 53 | bool mpls_output_possible(const struct net_device *dev) |
0189197f EB |
54 | { |
55 | return dev && (dev->flags & IFF_UP) && netif_carrier_ok(dev); | |
56 | } | |
face0188 | 57 | EXPORT_SYMBOL_GPL(mpls_output_possible); |
0189197f | 58 | |
cf4b24f0 RS |
59 | static u8 *__mpls_nh_via(struct mpls_route *rt, struct mpls_nh *nh) |
60 | { | |
61 | u8 *nh0_via = PTR_ALIGN((u8 *)&rt->rt_nh[rt->rt_nhn], VIA_ALEN_ALIGN); | |
62 | int nh_index = nh - rt->rt_nh; | |
63 | ||
64 | return nh0_via + rt->rt_max_alen * nh_index; | |
65 | } | |
66 | ||
67 | static const u8 *mpls_nh_via(const struct mpls_route *rt, | |
68 | const struct mpls_nh *nh) | |
69 | { | |
70 | return __mpls_nh_via((struct mpls_route *)rt, (struct mpls_nh *)nh); | |
71 | } | |
72 | ||
f8efb73c | 73 | static unsigned int mpls_nh_header_size(const struct mpls_nh *nh) |
0189197f EB |
74 | { |
75 | /* The size of the layer 2.5 labels to be added for this route */ | |
f8efb73c | 76 | return nh->nh_labels * sizeof(struct mpls_shim_hdr); |
0189197f EB |
77 | } |
78 | ||
face0188 | 79 | unsigned int mpls_dev_mtu(const struct net_device *dev) |
0189197f EB |
80 | { |
81 | /* The amount of data the layer 2 frame can hold */ | |
82 | return dev->mtu; | |
83 | } | |
face0188 | 84 | EXPORT_SYMBOL_GPL(mpls_dev_mtu); |
0189197f | 85 | |
face0188 | 86 | bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu) |
0189197f EB |
87 | { |
88 | if (skb->len <= mtu) | |
89 | return false; | |
90 | ||
ae7ef81e | 91 | if (skb_is_gso(skb) && skb_gso_validate_mtu(skb, mtu)) |
0189197f EB |
92 | return false; |
93 | ||
94 | return true; | |
95 | } | |
face0188 | 96 | EXPORT_SYMBOL_GPL(mpls_pkt_too_big); |
0189197f | 97 | |
27d69105 RS |
98 | void mpls_stats_inc_outucastpkts(struct net_device *dev, |
99 | const struct sk_buff *skb) | |
100 | { | |
101 | struct mpls_dev *mdev; | |
102 | ||
103 | if (skb->protocol == htons(ETH_P_MPLS_UC)) { | |
104 | mdev = mpls_dev_get(dev); | |
105 | if (mdev) | |
106 | MPLS_INC_STATS_LEN(mdev, skb->len, | |
107 | tx_packets, | |
108 | tx_bytes); | |
109 | } else if (skb->protocol == htons(ETH_P_IP)) { | |
110 | IP_UPD_PO_STATS(dev_net(dev), IPSTATS_MIB_OUT, skb->len); | |
111 | #if IS_ENABLED(CONFIG_IPV6) | |
112 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | |
113 | struct inet6_dev *in6dev = __in6_dev_get(dev); | |
114 | ||
115 | if (in6dev) | |
116 | IP6_UPD_PO_STATS(dev_net(dev), in6dev, | |
117 | IPSTATS_MIB_OUT, skb->len); | |
118 | #endif | |
119 | } | |
120 | } | |
121 | EXPORT_SYMBOL_GPL(mpls_stats_inc_outucastpkts); | |
122 | ||
9f427a0e | 123 | static u32 mpls_multipath_hash(struct mpls_route *rt, struct sk_buff *skb) |
f8efb73c | 124 | { |
1c78efa8 | 125 | struct mpls_entry_decoded dec; |
9f427a0e | 126 | unsigned int mpls_hdr_len = 0; |
1c78efa8 RS |
127 | struct mpls_shim_hdr *hdr; |
128 | bool eli_seen = false; | |
129 | int label_index; | |
1c78efa8 RS |
130 | u32 hash = 0; |
131 | ||
9f427a0e | 132 | for (label_index = 0; label_index < MAX_MP_SELECT_LABELS; |
1c78efa8 | 133 | label_index++) { |
9f427a0e DA |
134 | mpls_hdr_len += sizeof(*hdr); |
135 | if (!pskb_may_pull(skb, mpls_hdr_len)) | |
1c78efa8 RS |
136 | break; |
137 | ||
138 | /* Read and decode the current label */ | |
139 | hdr = mpls_hdr(skb) + label_index; | |
140 | dec = mpls_entry_decode(hdr); | |
141 | ||
142 | /* RFC6790 - reserved labels MUST NOT be used as keys | |
143 | * for the load-balancing function | |
144 | */ | |
145 | if (likely(dec.label >= MPLS_LABEL_FIRST_UNRESERVED)) { | |
146 | hash = jhash_1word(dec.label, hash); | |
147 | ||
148 | /* The entropy label follows the entropy label | |
149 | * indicator, so this means that the entropy | |
150 | * label was just added to the hash - no need to | |
151 | * go any deeper either in the label stack or in the | |
152 | * payload | |
153 | */ | |
154 | if (eli_seen) | |
155 | break; | |
156 | } else if (dec.label == MPLS_LABEL_ENTROPY) { | |
157 | eli_seen = true; | |
158 | } | |
159 | ||
9f427a0e DA |
160 | if (!dec.bos) |
161 | continue; | |
162 | ||
163 | /* found bottom label; does skb have room for a header? */ | |
164 | if (pskb_may_pull(skb, mpls_hdr_len + sizeof(struct iphdr))) { | |
1c78efa8 RS |
165 | const struct iphdr *v4hdr; |
166 | ||
9f427a0e | 167 | v4hdr = (const struct iphdr *)(hdr + 1); |
1c78efa8 RS |
168 | if (v4hdr->version == 4) { |
169 | hash = jhash_3words(ntohl(v4hdr->saddr), | |
170 | ntohl(v4hdr->daddr), | |
171 | v4hdr->protocol, hash); | |
172 | } else if (v4hdr->version == 6 && | |
9f427a0e DA |
173 | pskb_may_pull(skb, mpls_hdr_len + |
174 | sizeof(struct ipv6hdr))) { | |
1c78efa8 RS |
175 | const struct ipv6hdr *v6hdr; |
176 | ||
9f427a0e | 177 | v6hdr = (const struct ipv6hdr *)(hdr + 1); |
1c78efa8 RS |
178 | hash = __ipv6_addr_jhash(&v6hdr->saddr, hash); |
179 | hash = __ipv6_addr_jhash(&v6hdr->daddr, hash); | |
180 | hash = jhash_1word(v6hdr->nexthdr, hash); | |
181 | } | |
182 | } | |
9f427a0e DA |
183 | |
184 | break; | |
1c78efa8 RS |
185 | } |
186 | ||
c89359a4 RP |
187 | return hash; |
188 | } | |
189 | ||
190 | static struct mpls_nh *mpls_select_multipath(struct mpls_route *rt, | |
9f427a0e | 191 | struct sk_buff *skb) |
c89359a4 RP |
192 | { |
193 | int alive = ACCESS_ONCE(rt->rt_nhn_alive); | |
194 | u32 hash = 0; | |
195 | int nh_index = 0; | |
196 | int n = 0; | |
197 | ||
198 | /* No need to look further into packet if there's only | |
199 | * one path | |
200 | */ | |
201 | if (rt->rt_nhn == 1) | |
202 | goto out; | |
203 | ||
204 | if (alive <= 0) | |
205 | return NULL; | |
206 | ||
9f427a0e | 207 | hash = mpls_multipath_hash(rt, skb); |
c89359a4 RP |
208 | nh_index = hash % alive; |
209 | if (alive == rt->rt_nhn) | |
210 | goto out; | |
211 | for_nexthops(rt) { | |
212 | if (nh->nh_flags & (RTNH_F_DEAD | RTNH_F_LINKDOWN)) | |
213 | continue; | |
214 | if (n == nh_index) | |
215 | return nh; | |
216 | n++; | |
217 | } endfor_nexthops(rt); | |
218 | ||
1c78efa8 RS |
219 | out: |
220 | return &rt->rt_nh[nh_index]; | |
f8efb73c RP |
221 | } |
222 | ||
0189197f EB |
223 | static bool mpls_egress(struct mpls_route *rt, struct sk_buff *skb, |
224 | struct mpls_entry_decoded dec) | |
225 | { | |
118d5234 RS |
226 | enum mpls_payload_type payload_type; |
227 | bool success = false; | |
0189197f | 228 | |
76fecd82 EB |
229 | /* The IPv4 code below accesses through the IPv4 header |
230 | * checksum, which is 12 bytes into the packet. | |
231 | * The IPv6 code below accesses through the IPv6 hop limit | |
232 | * which is 8 bytes into the packet. | |
233 | * | |
234 | * For all supported cases there should always be at least 12 | |
235 | * bytes of packet data present. The IPv4 header is 20 bytes | |
236 | * without options and the IPv6 header is always 40 bytes | |
237 | * long. | |
238 | */ | |
239 | if (!pskb_may_pull(skb, 12)) | |
240 | return false; | |
241 | ||
118d5234 RS |
242 | payload_type = rt->rt_payload_type; |
243 | if (payload_type == MPT_UNSPEC) | |
244 | payload_type = ip_hdr(skb)->version; | |
245 | ||
246 | switch (payload_type) { | |
247 | case MPT_IPV4: { | |
248 | struct iphdr *hdr4 = ip_hdr(skb); | |
0189197f EB |
249 | skb->protocol = htons(ETH_P_IP); |
250 | csum_replace2(&hdr4->check, | |
251 | htons(hdr4->ttl << 8), | |
252 | htons(dec.ttl << 8)); | |
253 | hdr4->ttl = dec.ttl; | |
118d5234 RS |
254 | success = true; |
255 | break; | |
0189197f | 256 | } |
118d5234 | 257 | case MPT_IPV6: { |
0189197f EB |
258 | struct ipv6hdr *hdr6 = ipv6_hdr(skb); |
259 | skb->protocol = htons(ETH_P_IPV6); | |
260 | hdr6->hop_limit = dec.ttl; | |
118d5234 RS |
261 | success = true; |
262 | break; | |
0189197f | 263 | } |
118d5234 RS |
264 | case MPT_UNSPEC: |
265 | break; | |
266 | } | |
267 | ||
0189197f EB |
268 | return success; |
269 | } | |
270 | ||
271 | static int mpls_forward(struct sk_buff *skb, struct net_device *dev, | |
272 | struct packet_type *pt, struct net_device *orig_dev) | |
273 | { | |
274 | struct net *net = dev_net(dev); | |
275 | struct mpls_shim_hdr *hdr; | |
276 | struct mpls_route *rt; | |
f8efb73c | 277 | struct mpls_nh *nh; |
0189197f EB |
278 | struct mpls_entry_decoded dec; |
279 | struct net_device *out_dev; | |
27d69105 | 280 | struct mpls_dev *out_mdev; |
03c57747 | 281 | struct mpls_dev *mdev; |
0189197f EB |
282 | unsigned int hh_len; |
283 | unsigned int new_header_size; | |
284 | unsigned int mtu; | |
285 | int err; | |
286 | ||
287 | /* Careful this entire function runs inside of an rcu critical section */ | |
288 | ||
03c57747 | 289 | mdev = mpls_dev_get(dev); |
27d69105 | 290 | if (!mdev) |
03c57747 RS |
291 | goto drop; |
292 | ||
27d69105 RS |
293 | MPLS_INC_STATS_LEN(mdev, skb->len, rx_packets, |
294 | rx_bytes); | |
295 | ||
296 | if (!mdev->input_enabled) { | |
297 | MPLS_INC_STATS(mdev, rx_dropped); | |
0189197f | 298 | goto drop; |
27d69105 RS |
299 | } |
300 | ||
301 | if (skb->pkt_type != PACKET_HOST) | |
302 | goto err; | |
0189197f EB |
303 | |
304 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
27d69105 | 305 | goto err; |
0189197f EB |
306 | |
307 | if (!pskb_may_pull(skb, sizeof(*hdr))) | |
27d69105 | 308 | goto err; |
0189197f EB |
309 | |
310 | /* Read and decode the label */ | |
311 | hdr = mpls_hdr(skb); | |
312 | dec = mpls_entry_decode(hdr); | |
313 | ||
0189197f | 314 | rt = mpls_route_input_rcu(net, dec.label); |
27d69105 RS |
315 | if (!rt) { |
316 | MPLS_INC_STATS(mdev, rx_noroute); | |
0189197f | 317 | goto drop; |
27d69105 | 318 | } |
0189197f | 319 | |
9f427a0e | 320 | nh = mpls_select_multipath(rt, skb); |
f8efb73c | 321 | if (!nh) |
27d69105 | 322 | goto err; |
0189197f | 323 | |
9f427a0e DA |
324 | /* Pop the label */ |
325 | skb_pull(skb, sizeof(*hdr)); | |
326 | skb_reset_network_header(skb); | |
327 | ||
328 | skb_orphan(skb); | |
329 | ||
0189197f | 330 | if (skb_warn_if_lro(skb)) |
27d69105 | 331 | goto err; |
0189197f EB |
332 | |
333 | skb_forward_csum(skb); | |
334 | ||
335 | /* Verify ttl is valid */ | |
aa7da937 | 336 | if (dec.ttl <= 1) |
27d69105 | 337 | goto err; |
0189197f EB |
338 | dec.ttl -= 1; |
339 | ||
27d69105 RS |
340 | /* Find the output device */ |
341 | out_dev = rcu_dereference(nh->nh_dev); | |
342 | if (!mpls_output_possible(out_dev)) | |
343 | goto tx_err; | |
344 | ||
0189197f | 345 | /* Verify the destination can hold the packet */ |
f8efb73c | 346 | new_header_size = mpls_nh_header_size(nh); |
0189197f EB |
347 | mtu = mpls_dev_mtu(out_dev); |
348 | if (mpls_pkt_too_big(skb, mtu - new_header_size)) | |
27d69105 | 349 | goto tx_err; |
0189197f EB |
350 | |
351 | hh_len = LL_RESERVED_SPACE(out_dev); | |
352 | if (!out_dev->header_ops) | |
353 | hh_len = 0; | |
354 | ||
355 | /* Ensure there is enough space for the headers in the skb */ | |
356 | if (skb_cow(skb, hh_len + new_header_size)) | |
27d69105 | 357 | goto tx_err; |
0189197f EB |
358 | |
359 | skb->dev = out_dev; | |
360 | skb->protocol = htons(ETH_P_MPLS_UC); | |
361 | ||
362 | if (unlikely(!new_header_size && dec.bos)) { | |
363 | /* Penultimate hop popping */ | |
364 | if (!mpls_egress(rt, skb, dec)) | |
27d69105 | 365 | goto err; |
0189197f EB |
366 | } else { |
367 | bool bos; | |
368 | int i; | |
369 | skb_push(skb, new_header_size); | |
370 | skb_reset_network_header(skb); | |
371 | /* Push the new labels */ | |
372 | hdr = mpls_hdr(skb); | |
373 | bos = dec.bos; | |
f8efb73c RP |
374 | for (i = nh->nh_labels - 1; i >= 0; i--) { |
375 | hdr[i] = mpls_entry_encode(nh->nh_label[i], | |
376 | dec.ttl, 0, bos); | |
0189197f EB |
377 | bos = false; |
378 | } | |
379 | } | |
380 | ||
27d69105 RS |
381 | mpls_stats_inc_outucastpkts(out_dev, skb); |
382 | ||
eb7809f0 RS |
383 | /* If via wasn't specified then send out using device address */ |
384 | if (nh->nh_via_table == MPLS_NEIGH_TABLE_UNSPEC) | |
385 | err = neigh_xmit(NEIGH_LINK_TABLE, out_dev, | |
386 | out_dev->dev_addr, skb); | |
387 | else | |
388 | err = neigh_xmit(nh->nh_via_table, out_dev, | |
389 | mpls_nh_via(rt, nh), skb); | |
0189197f EB |
390 | if (err) |
391 | net_dbg_ratelimited("%s: packet transmission failed: %d\n", | |
392 | __func__, err); | |
393 | return 0; | |
394 | ||
27d69105 RS |
395 | tx_err: |
396 | out_mdev = out_dev ? mpls_dev_get(out_dev) : NULL; | |
397 | if (out_mdev) | |
398 | MPLS_INC_STATS(out_mdev, tx_errors); | |
399 | goto drop; | |
400 | err: | |
401 | MPLS_INC_STATS(mdev, rx_errors); | |
0189197f EB |
402 | drop: |
403 | kfree_skb(skb); | |
404 | return NET_RX_DROP; | |
405 | } | |
406 | ||
407 | static struct packet_type mpls_packet_type __read_mostly = { | |
408 | .type = cpu_to_be16(ETH_P_MPLS_UC), | |
409 | .func = mpls_forward, | |
410 | }; | |
411 | ||
f0126539 | 412 | static const struct nla_policy rtm_mpls_policy[RTA_MAX+1] = { |
03c05665 EB |
413 | [RTA_DST] = { .type = NLA_U32 }, |
414 | [RTA_OIF] = { .type = NLA_U32 }, | |
415 | }; | |
416 | ||
a2519929 | 417 | struct mpls_route_config { |
118d5234 RS |
418 | u32 rc_protocol; |
419 | u32 rc_ifindex; | |
f8efb73c RP |
420 | u8 rc_via_table; |
421 | u8 rc_via_alen; | |
118d5234 RS |
422 | u8 rc_via[MAX_VIA_ALEN]; |
423 | u32 rc_label; | |
f8efb73c | 424 | u8 rc_output_labels; |
118d5234 RS |
425 | u32 rc_output_label[MAX_NEW_LABELS]; |
426 | u32 rc_nlflags; | |
427 | enum mpls_payload_type rc_payload_type; | |
428 | struct nl_info rc_nlinfo; | |
f8efb73c RP |
429 | struct rtnexthop *rc_mp; |
430 | int rc_mp_len; | |
a2519929 EB |
431 | }; |
432 | ||
cf4b24f0 | 433 | static struct mpls_route *mpls_rt_alloc(int num_nh, u8 max_alen) |
0189197f | 434 | { |
cf4b24f0 | 435 | u8 max_alen_aligned = ALIGN(max_alen, VIA_ALEN_ALIGN); |
0189197f EB |
436 | struct mpls_route *rt; |
437 | ||
cf4b24f0 RS |
438 | rt = kzalloc(ALIGN(sizeof(*rt) + num_nh * sizeof(*rt->rt_nh), |
439 | VIA_ALEN_ALIGN) + | |
440 | num_nh * max_alen_aligned, | |
f8efb73c | 441 | GFP_KERNEL); |
cf4b24f0 | 442 | if (rt) { |
f8efb73c | 443 | rt->rt_nhn = num_nh; |
c89359a4 | 444 | rt->rt_nhn_alive = num_nh; |
cf4b24f0 RS |
445 | rt->rt_max_alen = max_alen_aligned; |
446 | } | |
f8efb73c | 447 | |
0189197f EB |
448 | return rt; |
449 | } | |
450 | ||
451 | static void mpls_rt_free(struct mpls_route *rt) | |
452 | { | |
453 | if (rt) | |
454 | kfree_rcu(rt, rt_rcu); | |
455 | } | |
456 | ||
8de147dc EB |
457 | static void mpls_notify_route(struct net *net, unsigned index, |
458 | struct mpls_route *old, struct mpls_route *new, | |
459 | const struct nl_info *info) | |
460 | { | |
461 | struct nlmsghdr *nlh = info ? info->nlh : NULL; | |
462 | unsigned portid = info ? info->portid : 0; | |
463 | int event = new ? RTM_NEWROUTE : RTM_DELROUTE; | |
464 | struct mpls_route *rt = new ? new : old; | |
465 | unsigned nlm_flags = (old && new) ? NLM_F_REPLACE : 0; | |
466 | /* Ignore reserved labels for now */ | |
a6affd24 | 467 | if (rt && (index >= MPLS_LABEL_FIRST_UNRESERVED)) |
8de147dc EB |
468 | rtmsg_lfib(event, index, rt, nlh, net, portid, nlm_flags); |
469 | } | |
470 | ||
0189197f | 471 | static void mpls_route_update(struct net *net, unsigned index, |
f8efb73c | 472 | struct mpls_route *new, |
0189197f EB |
473 | const struct nl_info *info) |
474 | { | |
19d0c341 | 475 | struct mpls_route __rcu **platform_label; |
f8efb73c | 476 | struct mpls_route *rt; |
0189197f EB |
477 | |
478 | ASSERT_RTNL(); | |
479 | ||
19d0c341 EB |
480 | platform_label = rtnl_dereference(net->mpls.platform_label); |
481 | rt = rtnl_dereference(platform_label[index]); | |
f8efb73c | 482 | rcu_assign_pointer(platform_label[index], new); |
0189197f | 483 | |
f8efb73c | 484 | mpls_notify_route(net, index, rt, new, info); |
8de147dc | 485 | |
0189197f | 486 | /* If we removed a route free it now */ |
f8efb73c | 487 | mpls_rt_free(rt); |
0189197f EB |
488 | } |
489 | ||
a2519929 EB |
490 | static unsigned find_free_label(struct net *net) |
491 | { | |
19d0c341 EB |
492 | struct mpls_route __rcu **platform_label; |
493 | size_t platform_labels; | |
a2519929 | 494 | unsigned index; |
19d0c341 EB |
495 | |
496 | platform_label = rtnl_dereference(net->mpls.platform_label); | |
497 | platform_labels = net->mpls.platform_labels; | |
a6affd24 RS |
498 | for (index = MPLS_LABEL_FIRST_UNRESERVED; index < platform_labels; |
499 | index++) { | |
19d0c341 | 500 | if (!rtnl_dereference(platform_label[index])) |
a2519929 EB |
501 | return index; |
502 | } | |
503 | return LABEL_NOT_SPECIFIED; | |
504 | } | |
505 | ||
bf21563a | 506 | #if IS_ENABLED(CONFIG_INET) |
cf4b24f0 RS |
507 | static struct net_device *inet_fib_lookup_dev(struct net *net, |
508 | const void *addr) | |
01faef2c | 509 | { |
5a9348b5 | 510 | struct net_device *dev; |
01faef2c RP |
511 | struct rtable *rt; |
512 | struct in_addr daddr; | |
513 | ||
514 | memcpy(&daddr, addr, sizeof(struct in_addr)); | |
515 | rt = ip_route_output(net, daddr.s_addr, 0, 0, 0); | |
516 | if (IS_ERR(rt)) | |
5a9348b5 | 517 | return ERR_CAST(rt); |
01faef2c RP |
518 | |
519 | dev = rt->dst.dev; | |
520 | dev_hold(dev); | |
521 | ||
522 | ip_rt_put(rt); | |
523 | ||
01faef2c | 524 | return dev; |
bf21563a RP |
525 | } |
526 | #else | |
cf4b24f0 RS |
527 | static struct net_device *inet_fib_lookup_dev(struct net *net, |
528 | const void *addr) | |
bf21563a RP |
529 | { |
530 | return ERR_PTR(-EAFNOSUPPORT); | |
01faef2c | 531 | } |
bf21563a | 532 | #endif |
01faef2c | 533 | |
bf21563a | 534 | #if IS_ENABLED(CONFIG_IPV6) |
cf4b24f0 RS |
535 | static struct net_device *inet6_fib_lookup_dev(struct net *net, |
536 | const void *addr) | |
01faef2c | 537 | { |
5a9348b5 | 538 | struct net_device *dev; |
01faef2c RP |
539 | struct dst_entry *dst; |
540 | struct flowi6 fl6; | |
bf21563a RP |
541 | int err; |
542 | ||
543 | if (!ipv6_stub) | |
544 | return ERR_PTR(-EAFNOSUPPORT); | |
01faef2c RP |
545 | |
546 | memset(&fl6, 0, sizeof(fl6)); | |
547 | memcpy(&fl6.daddr, addr, sizeof(struct in6_addr)); | |
bf21563a RP |
548 | err = ipv6_stub->ipv6_dst_lookup(net, NULL, &dst, &fl6); |
549 | if (err) | |
5a9348b5 | 550 | return ERR_PTR(err); |
01faef2c RP |
551 | |
552 | dev = dst->dev; | |
553 | dev_hold(dev); | |
01faef2c RP |
554 | dst_release(dst); |
555 | ||
556 | return dev; | |
557 | } | |
bf21563a | 558 | #else |
cf4b24f0 RS |
559 | static struct net_device *inet6_fib_lookup_dev(struct net *net, |
560 | const void *addr) | |
bf21563a RP |
561 | { |
562 | return ERR_PTR(-EAFNOSUPPORT); | |
563 | } | |
564 | #endif | |
01faef2c RP |
565 | |
566 | static struct net_device *find_outdev(struct net *net, | |
cf4b24f0 | 567 | struct mpls_route *rt, |
f8efb73c | 568 | struct mpls_nh *nh, int oif) |
01faef2c RP |
569 | { |
570 | struct net_device *dev = NULL; | |
571 | ||
f8efb73c RP |
572 | if (!oif) { |
573 | switch (nh->nh_via_table) { | |
01faef2c | 574 | case NEIGH_ARP_TABLE: |
cf4b24f0 | 575 | dev = inet_fib_lookup_dev(net, mpls_nh_via(rt, nh)); |
01faef2c RP |
576 | break; |
577 | case NEIGH_ND_TABLE: | |
cf4b24f0 | 578 | dev = inet6_fib_lookup_dev(net, mpls_nh_via(rt, nh)); |
01faef2c RP |
579 | break; |
580 | case NEIGH_LINK_TABLE: | |
581 | break; | |
582 | } | |
583 | } else { | |
f8efb73c | 584 | dev = dev_get_by_index(net, oif); |
01faef2c RP |
585 | } |
586 | ||
3dcb615e RP |
587 | if (!dev) |
588 | return ERR_PTR(-ENODEV); | |
589 | ||
94a57f1f RP |
590 | if (IS_ERR(dev)) |
591 | return dev; | |
592 | ||
f8efb73c RP |
593 | /* The caller is holding rtnl anyways, so release the dev reference */ |
594 | dev_put(dev); | |
595 | ||
01faef2c RP |
596 | return dev; |
597 | } | |
598 | ||
cf4b24f0 RS |
599 | static int mpls_nh_assign_dev(struct net *net, struct mpls_route *rt, |
600 | struct mpls_nh *nh, int oif) | |
f8efb73c RP |
601 | { |
602 | struct net_device *dev = NULL; | |
603 | int err = -ENODEV; | |
604 | ||
cf4b24f0 | 605 | dev = find_outdev(net, rt, nh, oif); |
f8efb73c RP |
606 | if (IS_ERR(dev)) { |
607 | err = PTR_ERR(dev); | |
608 | dev = NULL; | |
609 | goto errout; | |
610 | } | |
611 | ||
612 | /* Ensure this is a supported device */ | |
613 | err = -EINVAL; | |
614 | if (!mpls_dev_get(dev)) | |
615 | goto errout; | |
616 | ||
a3e948e8 RS |
617 | if ((nh->nh_via_table == NEIGH_LINK_TABLE) && |
618 | (dev->addr_len != nh->nh_via_alen)) | |
619 | goto errout; | |
620 | ||
f8efb73c RP |
621 | RCU_INIT_POINTER(nh->nh_dev, dev); |
622 | ||
c89359a4 RP |
623 | if (!(dev->flags & IFF_UP)) { |
624 | nh->nh_flags |= RTNH_F_DEAD; | |
625 | } else { | |
626 | unsigned int flags; | |
627 | ||
628 | flags = dev_get_flags(dev); | |
629 | if (!(flags & (IFF_RUNNING | IFF_LOWER_UP))) | |
630 | nh->nh_flags |= RTNH_F_LINKDOWN; | |
631 | } | |
632 | ||
f8efb73c RP |
633 | return 0; |
634 | ||
635 | errout: | |
636 | return err; | |
637 | } | |
638 | ||
639 | static int mpls_nh_build_from_cfg(struct mpls_route_config *cfg, | |
640 | struct mpls_route *rt) | |
641 | { | |
642 | struct net *net = cfg->rc_nlinfo.nl_net; | |
643 | struct mpls_nh *nh = rt->rt_nh; | |
644 | int err; | |
645 | int i; | |
646 | ||
647 | if (!nh) | |
648 | return -ENOMEM; | |
649 | ||
650 | err = -EINVAL; | |
651 | /* Ensure only a supported number of labels are present */ | |
652 | if (cfg->rc_output_labels > MAX_NEW_LABELS) | |
653 | goto errout; | |
654 | ||
655 | nh->nh_labels = cfg->rc_output_labels; | |
656 | for (i = 0; i < nh->nh_labels; i++) | |
657 | nh->nh_label[i] = cfg->rc_output_label[i]; | |
658 | ||
659 | nh->nh_via_table = cfg->rc_via_table; | |
cf4b24f0 | 660 | memcpy(__mpls_nh_via(rt, nh), cfg->rc_via, cfg->rc_via_alen); |
f8efb73c RP |
661 | nh->nh_via_alen = cfg->rc_via_alen; |
662 | ||
cf4b24f0 | 663 | err = mpls_nh_assign_dev(net, rt, nh, cfg->rc_ifindex); |
f8efb73c RP |
664 | if (err) |
665 | goto errout; | |
666 | ||
c89359a4 RP |
667 | if (nh->nh_flags & (RTNH_F_DEAD | RTNH_F_LINKDOWN)) |
668 | rt->rt_nhn_alive--; | |
669 | ||
f8efb73c RP |
670 | return 0; |
671 | ||
672 | errout: | |
673 | return err; | |
674 | } | |
675 | ||
cf4b24f0 | 676 | static int mpls_nh_build(struct net *net, struct mpls_route *rt, |
c89359a4 RP |
677 | struct mpls_nh *nh, int oif, struct nlattr *via, |
678 | struct nlattr *newdst) | |
f8efb73c RP |
679 | { |
680 | int err = -ENOMEM; | |
681 | ||
682 | if (!nh) | |
683 | goto errout; | |
684 | ||
685 | if (newdst) { | |
686 | err = nla_get_labels(newdst, MAX_NEW_LABELS, | |
687 | &nh->nh_labels, nh->nh_label); | |
688 | if (err) | |
689 | goto errout; | |
690 | } | |
691 | ||
f20367df RS |
692 | if (via) { |
693 | err = nla_get_via(via, &nh->nh_via_alen, &nh->nh_via_table, | |
694 | __mpls_nh_via(rt, nh)); | |
695 | if (err) | |
696 | goto errout; | |
697 | } else { | |
698 | nh->nh_via_table = MPLS_NEIGH_TABLE_UNSPEC; | |
699 | } | |
f8efb73c | 700 | |
cf4b24f0 | 701 | err = mpls_nh_assign_dev(net, rt, nh, oif); |
f8efb73c RP |
702 | if (err) |
703 | goto errout; | |
704 | ||
705 | return 0; | |
706 | ||
707 | errout: | |
708 | return err; | |
709 | } | |
710 | ||
cf4b24f0 RS |
711 | static int mpls_count_nexthops(struct rtnexthop *rtnh, int len, |
712 | u8 cfg_via_alen, u8 *max_via_alen) | |
f8efb73c RP |
713 | { |
714 | int nhs = 0; | |
715 | int remaining = len; | |
716 | ||
cf4b24f0 RS |
717 | if (!rtnh) { |
718 | *max_via_alen = cfg_via_alen; | |
719 | return 1; | |
720 | } | |
721 | ||
722 | *max_via_alen = 0; | |
723 | ||
f8efb73c | 724 | while (rtnh_ok(rtnh, remaining)) { |
cf4b24f0 RS |
725 | struct nlattr *nla, *attrs = rtnh_attrs(rtnh); |
726 | int attrlen; | |
727 | ||
728 | attrlen = rtnh_attrlen(rtnh); | |
729 | nla = nla_find(attrs, attrlen, RTA_VIA); | |
730 | if (nla && nla_len(nla) >= | |
731 | offsetof(struct rtvia, rtvia_addr)) { | |
732 | int via_alen = nla_len(nla) - | |
733 | offsetof(struct rtvia, rtvia_addr); | |
734 | ||
735 | if (via_alen <= MAX_VIA_ALEN) | |
736 | *max_via_alen = max_t(u16, *max_via_alen, | |
737 | via_alen); | |
738 | } | |
739 | ||
f8efb73c RP |
740 | nhs++; |
741 | rtnh = rtnh_next(rtnh, &remaining); | |
742 | } | |
743 | ||
744 | /* leftover implies invalid nexthop configuration, discard it */ | |
745 | return remaining > 0 ? 0 : nhs; | |
746 | } | |
747 | ||
748 | static int mpls_nh_build_multi(struct mpls_route_config *cfg, | |
749 | struct mpls_route *rt) | |
750 | { | |
751 | struct rtnexthop *rtnh = cfg->rc_mp; | |
752 | struct nlattr *nla_via, *nla_newdst; | |
753 | int remaining = cfg->rc_mp_len; | |
754 | int nhs = 0; | |
755 | int err = 0; | |
756 | ||
757 | change_nexthops(rt) { | |
758 | int attrlen; | |
759 | ||
760 | nla_via = NULL; | |
761 | nla_newdst = NULL; | |
762 | ||
763 | err = -EINVAL; | |
764 | if (!rtnh_ok(rtnh, remaining)) | |
765 | goto errout; | |
766 | ||
1c78efa8 RS |
767 | /* neither weighted multipath nor any flags |
768 | * are supported | |
769 | */ | |
770 | if (rtnh->rtnh_hops || rtnh->rtnh_flags) | |
771 | goto errout; | |
772 | ||
f8efb73c RP |
773 | attrlen = rtnh_attrlen(rtnh); |
774 | if (attrlen > 0) { | |
775 | struct nlattr *attrs = rtnh_attrs(rtnh); | |
776 | ||
777 | nla_via = nla_find(attrs, attrlen, RTA_VIA); | |
778 | nla_newdst = nla_find(attrs, attrlen, RTA_NEWDST); | |
779 | } | |
780 | ||
cf4b24f0 | 781 | err = mpls_nh_build(cfg->rc_nlinfo.nl_net, rt, nh, |
c89359a4 | 782 | rtnh->rtnh_ifindex, nla_via, nla_newdst); |
f8efb73c RP |
783 | if (err) |
784 | goto errout; | |
785 | ||
c89359a4 RP |
786 | if (nh->nh_flags & (RTNH_F_DEAD | RTNH_F_LINKDOWN)) |
787 | rt->rt_nhn_alive--; | |
788 | ||
f8efb73c RP |
789 | rtnh = rtnh_next(rtnh, &remaining); |
790 | nhs++; | |
791 | } endfor_nexthops(rt); | |
792 | ||
793 | rt->rt_nhn = nhs; | |
794 | ||
795 | return 0; | |
796 | ||
797 | errout: | |
798 | return err; | |
799 | } | |
800 | ||
a2519929 EB |
801 | static int mpls_route_add(struct mpls_route_config *cfg) |
802 | { | |
19d0c341 | 803 | struct mpls_route __rcu **platform_label; |
a2519929 | 804 | struct net *net = cfg->rc_nlinfo.nl_net; |
a2519929 | 805 | struct mpls_route *rt, *old; |
a2519929 | 806 | int err = -EINVAL; |
cf4b24f0 | 807 | u8 max_via_alen; |
f8efb73c | 808 | unsigned index; |
cf4b24f0 | 809 | int nhs; |
a2519929 EB |
810 | |
811 | index = cfg->rc_label; | |
812 | ||
813 | /* If a label was not specified during insert pick one */ | |
814 | if ((index == LABEL_NOT_SPECIFIED) && | |
815 | (cfg->rc_nlflags & NLM_F_CREATE)) { | |
816 | index = find_free_label(net); | |
817 | } | |
818 | ||
a6affd24 RS |
819 | /* Reserved labels may not be set */ |
820 | if (index < MPLS_LABEL_FIRST_UNRESERVED) | |
a2519929 EB |
821 | goto errout; |
822 | ||
823 | /* The full 20 bit range may not be supported. */ | |
824 | if (index >= net->mpls.platform_labels) | |
825 | goto errout; | |
826 | ||
a2519929 | 827 | /* Append makes no sense with mpls */ |
0f7bbd58 | 828 | err = -EOPNOTSUPP; |
a2519929 EB |
829 | if (cfg->rc_nlflags & NLM_F_APPEND) |
830 | goto errout; | |
831 | ||
832 | err = -EEXIST; | |
19d0c341 EB |
833 | platform_label = rtnl_dereference(net->mpls.platform_label); |
834 | old = rtnl_dereference(platform_label[index]); | |
a2519929 EB |
835 | if ((cfg->rc_nlflags & NLM_F_EXCL) && old) |
836 | goto errout; | |
837 | ||
838 | err = -EEXIST; | |
839 | if (!(cfg->rc_nlflags & NLM_F_REPLACE) && old) | |
840 | goto errout; | |
841 | ||
842 | err = -ENOENT; | |
843 | if (!(cfg->rc_nlflags & NLM_F_CREATE) && !old) | |
844 | goto errout; | |
845 | ||
cf4b24f0 RS |
846 | err = -EINVAL; |
847 | nhs = mpls_count_nexthops(cfg->rc_mp, cfg->rc_mp_len, | |
848 | cfg->rc_via_alen, &max_via_alen); | |
849 | if (nhs == 0) | |
850 | goto errout; | |
f8efb73c | 851 | |
a2519929 | 852 | err = -ENOMEM; |
cf4b24f0 | 853 | rt = mpls_rt_alloc(nhs, max_via_alen); |
a2519929 EB |
854 | if (!rt) |
855 | goto errout; | |
856 | ||
a2519929 | 857 | rt->rt_protocol = cfg->rc_protocol; |
118d5234 | 858 | rt->rt_payload_type = cfg->rc_payload_type; |
a2519929 | 859 | |
f8efb73c RP |
860 | if (cfg->rc_mp) |
861 | err = mpls_nh_build_multi(cfg, rt); | |
862 | else | |
863 | err = mpls_nh_build_from_cfg(cfg, rt); | |
864 | if (err) | |
865 | goto freert; | |
866 | ||
867 | mpls_route_update(net, index, rt, &cfg->rc_nlinfo); | |
a2519929 | 868 | |
a2519929 EB |
869 | return 0; |
870 | ||
f8efb73c RP |
871 | freert: |
872 | mpls_rt_free(rt); | |
a2519929 | 873 | errout: |
a2519929 EB |
874 | return err; |
875 | } | |
876 | ||
877 | static int mpls_route_del(struct mpls_route_config *cfg) | |
878 | { | |
879 | struct net *net = cfg->rc_nlinfo.nl_net; | |
880 | unsigned index; | |
881 | int err = -EINVAL; | |
882 | ||
883 | index = cfg->rc_label; | |
884 | ||
a6affd24 RS |
885 | /* Reserved labels may not be removed */ |
886 | if (index < MPLS_LABEL_FIRST_UNRESERVED) | |
a2519929 EB |
887 | goto errout; |
888 | ||
889 | /* The full 20 bit range may not be supported */ | |
890 | if (index >= net->mpls.platform_labels) | |
891 | goto errout; | |
892 | ||
f8efb73c | 893 | mpls_route_update(net, index, NULL, &cfg->rc_nlinfo); |
a2519929 EB |
894 | |
895 | err = 0; | |
896 | errout: | |
897 | return err; | |
898 | } | |
899 | ||
27d69105 RS |
900 | static void mpls_get_stats(struct mpls_dev *mdev, |
901 | struct mpls_link_stats *stats) | |
902 | { | |
903 | struct mpls_pcpu_stats *p; | |
904 | int i; | |
905 | ||
906 | memset(stats, 0, sizeof(*stats)); | |
907 | ||
908 | for_each_possible_cpu(i) { | |
909 | struct mpls_link_stats local; | |
910 | unsigned int start; | |
911 | ||
912 | p = per_cpu_ptr(mdev->stats, i); | |
913 | do { | |
914 | start = u64_stats_fetch_begin(&p->syncp); | |
915 | local = p->stats; | |
916 | } while (u64_stats_fetch_retry(&p->syncp, start)); | |
917 | ||
918 | stats->rx_packets += local.rx_packets; | |
919 | stats->rx_bytes += local.rx_bytes; | |
920 | stats->tx_packets += local.tx_packets; | |
921 | stats->tx_bytes += local.tx_bytes; | |
922 | stats->rx_errors += local.rx_errors; | |
923 | stats->tx_errors += local.tx_errors; | |
924 | stats->rx_dropped += local.rx_dropped; | |
925 | stats->tx_dropped += local.tx_dropped; | |
926 | stats->rx_noroute += local.rx_noroute; | |
927 | } | |
928 | } | |
929 | ||
930 | static int mpls_fill_stats_af(struct sk_buff *skb, | |
931 | const struct net_device *dev) | |
932 | { | |
933 | struct mpls_link_stats *stats; | |
934 | struct mpls_dev *mdev; | |
935 | struct nlattr *nla; | |
936 | ||
937 | mdev = mpls_dev_get(dev); | |
938 | if (!mdev) | |
939 | return -ENODATA; | |
940 | ||
941 | nla = nla_reserve_64bit(skb, MPLS_STATS_LINK, | |
942 | sizeof(struct mpls_link_stats), | |
943 | MPLS_STATS_UNSPEC); | |
944 | if (!nla) | |
945 | return -EMSGSIZE; | |
946 | ||
947 | stats = nla_data(nla); | |
948 | mpls_get_stats(mdev, stats); | |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
953 | static size_t mpls_get_stats_af_size(const struct net_device *dev) | |
954 | { | |
955 | struct mpls_dev *mdev; | |
956 | ||
957 | mdev = mpls_dev_get(dev); | |
958 | if (!mdev) | |
959 | return 0; | |
960 | ||
961 | return nla_total_size_64bit(sizeof(struct mpls_link_stats)); | |
962 | } | |
963 | ||
24045a03 DA |
964 | static int mpls_netconf_fill_devconf(struct sk_buff *skb, struct mpls_dev *mdev, |
965 | u32 portid, u32 seq, int event, | |
966 | unsigned int flags, int type) | |
967 | { | |
968 | struct nlmsghdr *nlh; | |
969 | struct netconfmsg *ncm; | |
970 | bool all = false; | |
971 | ||
972 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
973 | flags); | |
974 | if (!nlh) | |
975 | return -EMSGSIZE; | |
976 | ||
977 | if (type == NETCONFA_ALL) | |
978 | all = true; | |
979 | ||
980 | ncm = nlmsg_data(nlh); | |
981 | ncm->ncm_family = AF_MPLS; | |
982 | ||
983 | if (nla_put_s32(skb, NETCONFA_IFINDEX, mdev->dev->ifindex) < 0) | |
984 | goto nla_put_failure; | |
985 | ||
986 | if ((all || type == NETCONFA_INPUT) && | |
987 | nla_put_s32(skb, NETCONFA_INPUT, | |
988 | mdev->input_enabled) < 0) | |
989 | goto nla_put_failure; | |
990 | ||
991 | nlmsg_end(skb, nlh); | |
992 | return 0; | |
993 | ||
994 | nla_put_failure: | |
995 | nlmsg_cancel(skb, nlh); | |
996 | return -EMSGSIZE; | |
997 | } | |
998 | ||
999 | static int mpls_netconf_msgsize_devconf(int type) | |
1000 | { | |
1001 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
1002 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
1003 | bool all = false; | |
1004 | ||
1005 | if (type == NETCONFA_ALL) | |
1006 | all = true; | |
1007 | ||
1008 | if (all || type == NETCONFA_INPUT) | |
1009 | size += nla_total_size(4); | |
1010 | ||
1011 | return size; | |
1012 | } | |
1013 | ||
1014 | static void mpls_netconf_notify_devconf(struct net *net, int type, | |
1015 | struct mpls_dev *mdev) | |
1016 | { | |
1017 | struct sk_buff *skb; | |
1018 | int err = -ENOBUFS; | |
1019 | ||
1020 | skb = nlmsg_new(mpls_netconf_msgsize_devconf(type), GFP_KERNEL); | |
1021 | if (!skb) | |
1022 | goto errout; | |
1023 | ||
1024 | err = mpls_netconf_fill_devconf(skb, mdev, 0, 0, RTM_NEWNETCONF, | |
1025 | 0, type); | |
1026 | if (err < 0) { | |
1027 | /* -EMSGSIZE implies BUG in mpls_netconf_msgsize_devconf() */ | |
1028 | WARN_ON(err == -EMSGSIZE); | |
1029 | kfree_skb(skb); | |
1030 | goto errout; | |
1031 | } | |
1032 | ||
1033 | rtnl_notify(skb, net, 0, RTNLGRP_MPLS_NETCONF, NULL, GFP_KERNEL); | |
1034 | return; | |
1035 | errout: | |
1036 | if (err < 0) | |
1037 | rtnl_set_sk_err(net, RTNLGRP_MPLS_NETCONF, err); | |
1038 | } | |
1039 | ||
1040 | static const struct nla_policy devconf_mpls_policy[NETCONFA_MAX + 1] = { | |
1041 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
1042 | }; | |
1043 | ||
1044 | static int mpls_netconf_get_devconf(struct sk_buff *in_skb, | |
1045 | struct nlmsghdr *nlh) | |
1046 | { | |
1047 | struct net *net = sock_net(in_skb->sk); | |
1048 | struct nlattr *tb[NETCONFA_MAX + 1]; | |
1049 | struct netconfmsg *ncm; | |
1050 | struct net_device *dev; | |
1051 | struct mpls_dev *mdev; | |
1052 | struct sk_buff *skb; | |
1053 | int ifindex; | |
1054 | int err; | |
1055 | ||
1056 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
1057 | devconf_mpls_policy); | |
1058 | if (err < 0) | |
1059 | goto errout; | |
1060 | ||
1061 | err = -EINVAL; | |
1062 | if (!tb[NETCONFA_IFINDEX]) | |
1063 | goto errout; | |
1064 | ||
1065 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
1066 | dev = __dev_get_by_index(net, ifindex); | |
1067 | if (!dev) | |
1068 | goto errout; | |
1069 | ||
1070 | mdev = mpls_dev_get(dev); | |
1071 | if (!mdev) | |
1072 | goto errout; | |
1073 | ||
1074 | err = -ENOBUFS; | |
1075 | skb = nlmsg_new(mpls_netconf_msgsize_devconf(NETCONFA_ALL), GFP_KERNEL); | |
1076 | if (!skb) | |
1077 | goto errout; | |
1078 | ||
1079 | err = mpls_netconf_fill_devconf(skb, mdev, | |
1080 | NETLINK_CB(in_skb).portid, | |
1081 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
1082 | NETCONFA_ALL); | |
1083 | if (err < 0) { | |
1084 | /* -EMSGSIZE implies BUG in mpls_netconf_msgsize_devconf() */ | |
1085 | WARN_ON(err == -EMSGSIZE); | |
1086 | kfree_skb(skb); | |
1087 | goto errout; | |
1088 | } | |
1089 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
1090 | errout: | |
1091 | return err; | |
1092 | } | |
1093 | ||
1094 | static int mpls_netconf_dump_devconf(struct sk_buff *skb, | |
1095 | struct netlink_callback *cb) | |
1096 | { | |
1097 | struct net *net = sock_net(skb->sk); | |
1098 | struct hlist_head *head; | |
1099 | struct net_device *dev; | |
1100 | struct mpls_dev *mdev; | |
1101 | int idx, s_idx; | |
1102 | int h, s_h; | |
1103 | ||
1104 | s_h = cb->args[0]; | |
1105 | s_idx = idx = cb->args[1]; | |
1106 | ||
1107 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
1108 | idx = 0; | |
1109 | head = &net->dev_index_head[h]; | |
1110 | rcu_read_lock(); | |
1111 | cb->seq = net->dev_base_seq; | |
1112 | hlist_for_each_entry_rcu(dev, head, index_hlist) { | |
1113 | if (idx < s_idx) | |
1114 | goto cont; | |
1115 | mdev = mpls_dev_get(dev); | |
1116 | if (!mdev) | |
1117 | goto cont; | |
1118 | if (mpls_netconf_fill_devconf(skb, mdev, | |
1119 | NETLINK_CB(cb->skb).portid, | |
1120 | cb->nlh->nlmsg_seq, | |
1121 | RTM_NEWNETCONF, | |
1122 | NLM_F_MULTI, | |
1123 | NETCONFA_ALL) < 0) { | |
1124 | rcu_read_unlock(); | |
1125 | goto done; | |
1126 | } | |
1127 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); | |
1128 | cont: | |
1129 | idx++; | |
1130 | } | |
1131 | rcu_read_unlock(); | |
1132 | } | |
1133 | done: | |
1134 | cb->args[0] = h; | |
1135 | cb->args[1] = idx; | |
1136 | ||
1137 | return skb->len; | |
1138 | } | |
1139 | ||
37bde799 RS |
1140 | #define MPLS_PERDEV_SYSCTL_OFFSET(field) \ |
1141 | (&((struct mpls_dev *)0)->field) | |
1142 | ||
24045a03 DA |
1143 | static int mpls_conf_proc(struct ctl_table *ctl, int write, |
1144 | void __user *buffer, | |
1145 | size_t *lenp, loff_t *ppos) | |
1146 | { | |
1147 | int oval = *(int *)ctl->data; | |
1148 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
1149 | ||
1150 | if (write) { | |
1151 | struct mpls_dev *mdev = ctl->extra1; | |
1152 | int i = (int *)ctl->data - (int *)mdev; | |
1153 | struct net *net = ctl->extra2; | |
1154 | int val = *(int *)ctl->data; | |
1155 | ||
1156 | if (i == offsetof(struct mpls_dev, input_enabled) && | |
1157 | val != oval) { | |
1158 | mpls_netconf_notify_devconf(net, | |
1159 | NETCONFA_INPUT, | |
1160 | mdev); | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | return ret; | |
1165 | } | |
1166 | ||
37bde799 RS |
1167 | static const struct ctl_table mpls_dev_table[] = { |
1168 | { | |
1169 | .procname = "input", | |
1170 | .maxlen = sizeof(int), | |
1171 | .mode = 0644, | |
24045a03 | 1172 | .proc_handler = mpls_conf_proc, |
37bde799 RS |
1173 | .data = MPLS_PERDEV_SYSCTL_OFFSET(input_enabled), |
1174 | }, | |
1175 | { } | |
1176 | }; | |
1177 | ||
1178 | static int mpls_dev_sysctl_register(struct net_device *dev, | |
1179 | struct mpls_dev *mdev) | |
1180 | { | |
1181 | char path[sizeof("net/mpls/conf/") + IFNAMSIZ]; | |
24045a03 | 1182 | struct net *net = dev_net(dev); |
37bde799 RS |
1183 | struct ctl_table *table; |
1184 | int i; | |
1185 | ||
1186 | table = kmemdup(&mpls_dev_table, sizeof(mpls_dev_table), GFP_KERNEL); | |
1187 | if (!table) | |
1188 | goto out; | |
1189 | ||
1190 | /* Table data contains only offsets relative to the base of | |
1191 | * the mdev at this point, so make them absolute. | |
1192 | */ | |
24045a03 | 1193 | for (i = 0; i < ARRAY_SIZE(mpls_dev_table); i++) { |
37bde799 | 1194 | table[i].data = (char *)mdev + (uintptr_t)table[i].data; |
24045a03 DA |
1195 | table[i].extra1 = mdev; |
1196 | table[i].extra2 = net; | |
1197 | } | |
37bde799 RS |
1198 | |
1199 | snprintf(path, sizeof(path), "net/mpls/conf/%s", dev->name); | |
1200 | ||
1201 | mdev->sysctl = register_net_sysctl(dev_net(dev), path, table); | |
1202 | if (!mdev->sysctl) | |
1203 | goto free; | |
1204 | ||
1205 | return 0; | |
1206 | ||
1207 | free: | |
1208 | kfree(table); | |
1209 | out: | |
1210 | return -ENOBUFS; | |
1211 | } | |
1212 | ||
1213 | static void mpls_dev_sysctl_unregister(struct mpls_dev *mdev) | |
1214 | { | |
1215 | struct ctl_table *table; | |
1216 | ||
1217 | table = mdev->sysctl->ctl_table_arg; | |
1218 | unregister_net_sysctl_table(mdev->sysctl); | |
1219 | kfree(table); | |
1220 | } | |
1221 | ||
03c57747 RS |
1222 | static struct mpls_dev *mpls_add_dev(struct net_device *dev) |
1223 | { | |
1224 | struct mpls_dev *mdev; | |
1225 | int err = -ENOMEM; | |
27d69105 | 1226 | int i; |
03c57747 RS |
1227 | |
1228 | ASSERT_RTNL(); | |
1229 | ||
1230 | mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); | |
1231 | if (!mdev) | |
1232 | return ERR_PTR(err); | |
1233 | ||
27d69105 RS |
1234 | mdev->stats = alloc_percpu(struct mpls_pcpu_stats); |
1235 | if (!mdev->stats) | |
1236 | goto free; | |
1237 | ||
1238 | for_each_possible_cpu(i) { | |
1239 | struct mpls_pcpu_stats *mpls_stats; | |
1240 | ||
1241 | mpls_stats = per_cpu_ptr(mdev->stats, i); | |
1242 | u64_stats_init(&mpls_stats->syncp); | |
1243 | } | |
1244 | ||
37bde799 RS |
1245 | err = mpls_dev_sysctl_register(dev, mdev); |
1246 | if (err) | |
1247 | goto free; | |
1248 | ||
24045a03 | 1249 | mdev->dev = dev; |
03c57747 RS |
1250 | rcu_assign_pointer(dev->mpls_ptr, mdev); |
1251 | ||
1252 | return mdev; | |
37bde799 RS |
1253 | |
1254 | free: | |
27d69105 | 1255 | free_percpu(mdev->stats); |
37bde799 RS |
1256 | kfree(mdev); |
1257 | return ERR_PTR(err); | |
03c57747 RS |
1258 | } |
1259 | ||
27d69105 RS |
1260 | static void mpls_dev_destroy_rcu(struct rcu_head *head) |
1261 | { | |
1262 | struct mpls_dev *mdev = container_of(head, struct mpls_dev, rcu); | |
1263 | ||
1264 | free_percpu(mdev->stats); | |
1265 | kfree(mdev); | |
1266 | } | |
1267 | ||
c89359a4 | 1268 | static void mpls_ifdown(struct net_device *dev, int event) |
0189197f | 1269 | { |
19d0c341 | 1270 | struct mpls_route __rcu **platform_label; |
0189197f EB |
1271 | struct net *net = dev_net(dev); |
1272 | unsigned index; | |
1273 | ||
19d0c341 | 1274 | platform_label = rtnl_dereference(net->mpls.platform_label); |
0189197f | 1275 | for (index = 0; index < net->mpls.platform_labels; index++) { |
19d0c341 | 1276 | struct mpls_route *rt = rtnl_dereference(platform_label[index]); |
c89359a4 | 1277 | |
0189197f EB |
1278 | if (!rt) |
1279 | continue; | |
c89359a4 RP |
1280 | |
1281 | change_nexthops(rt) { | |
f8efb73c RP |
1282 | if (rtnl_dereference(nh->nh_dev) != dev) |
1283 | continue; | |
c89359a4 RP |
1284 | switch (event) { |
1285 | case NETDEV_DOWN: | |
1286 | case NETDEV_UNREGISTER: | |
1287 | nh->nh_flags |= RTNH_F_DEAD; | |
1288 | /* fall through */ | |
1289 | case NETDEV_CHANGE: | |
1290 | nh->nh_flags |= RTNH_F_LINKDOWN; | |
79099aab DA |
1291 | if (event != NETDEV_UNREGISTER) |
1292 | ACCESS_ONCE(rt->rt_nhn_alive) = rt->rt_nhn_alive - 1; | |
c89359a4 RP |
1293 | break; |
1294 | } | |
1295 | if (event == NETDEV_UNREGISTER) | |
1296 | RCU_INIT_POINTER(nh->nh_dev, NULL); | |
f8efb73c | 1297 | } endfor_nexthops(rt); |
0189197f | 1298 | } |
c89359a4 RP |
1299 | } |
1300 | ||
1301 | static void mpls_ifup(struct net_device *dev, unsigned int nh_flags) | |
1302 | { | |
1303 | struct mpls_route __rcu **platform_label; | |
1304 | struct net *net = dev_net(dev); | |
1305 | unsigned index; | |
1306 | int alive; | |
1307 | ||
1308 | platform_label = rtnl_dereference(net->mpls.platform_label); | |
1309 | for (index = 0; index < net->mpls.platform_labels; index++) { | |
1310 | struct mpls_route *rt = rtnl_dereference(platform_label[index]); | |
1311 | ||
1312 | if (!rt) | |
1313 | continue; | |
37bde799 | 1314 | |
c89359a4 RP |
1315 | alive = 0; |
1316 | change_nexthops(rt) { | |
1317 | struct net_device *nh_dev = | |
1318 | rtnl_dereference(nh->nh_dev); | |
03c57747 | 1319 | |
c89359a4 RP |
1320 | if (!(nh->nh_flags & nh_flags)) { |
1321 | alive++; | |
1322 | continue; | |
1323 | } | |
1324 | if (nh_dev != dev) | |
1325 | continue; | |
1326 | alive++; | |
1327 | nh->nh_flags &= ~nh_flags; | |
1328 | } endfor_nexthops(rt); | |
1329 | ||
1330 | ACCESS_ONCE(rt->rt_nhn_alive) = alive; | |
1331 | } | |
0189197f EB |
1332 | } |
1333 | ||
1334 | static int mpls_dev_notify(struct notifier_block *this, unsigned long event, | |
1335 | void *ptr) | |
1336 | { | |
1337 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
03c57747 | 1338 | struct mpls_dev *mdev; |
c89359a4 | 1339 | unsigned int flags; |
0189197f | 1340 | |
c89359a4 | 1341 | if (event == NETDEV_REGISTER) { |
407f31be | 1342 | /* For now just support Ethernet, IPGRE, SIT and IPIP devices */ |
0d227a86 SH |
1343 | if (dev->type == ARPHRD_ETHER || |
1344 | dev->type == ARPHRD_LOOPBACK || | |
407f31be SH |
1345 | dev->type == ARPHRD_IPGRE || |
1346 | dev->type == ARPHRD_SIT || | |
1347 | dev->type == ARPHRD_TUNNEL) { | |
03c57747 RS |
1348 | mdev = mpls_add_dev(dev); |
1349 | if (IS_ERR(mdev)) | |
1350 | return notifier_from_errno(PTR_ERR(mdev)); | |
1351 | } | |
c89359a4 RP |
1352 | return NOTIFY_OK; |
1353 | } | |
03c57747 | 1354 | |
c89359a4 RP |
1355 | mdev = mpls_dev_get(dev); |
1356 | if (!mdev) | |
1357 | return NOTIFY_OK; | |
1358 | ||
1359 | switch (event) { | |
1360 | case NETDEV_DOWN: | |
1361 | mpls_ifdown(dev, event); | |
1362 | break; | |
1363 | case NETDEV_UP: | |
1364 | flags = dev_get_flags(dev); | |
1365 | if (flags & (IFF_RUNNING | IFF_LOWER_UP)) | |
1366 | mpls_ifup(dev, RTNH_F_DEAD | RTNH_F_LINKDOWN); | |
1367 | else | |
1368 | mpls_ifup(dev, RTNH_F_DEAD); | |
1369 | break; | |
1370 | case NETDEV_CHANGE: | |
1371 | flags = dev_get_flags(dev); | |
1372 | if (flags & (IFF_RUNNING | IFF_LOWER_UP)) | |
1373 | mpls_ifup(dev, RTNH_F_DEAD | RTNH_F_LINKDOWN); | |
1374 | else | |
1375 | mpls_ifdown(dev, event); | |
1376 | break; | |
0189197f | 1377 | case NETDEV_UNREGISTER: |
c89359a4 RP |
1378 | mpls_ifdown(dev, event); |
1379 | mdev = mpls_dev_get(dev); | |
1380 | if (mdev) { | |
1381 | mpls_dev_sysctl_unregister(mdev); | |
1382 | RCU_INIT_POINTER(dev->mpls_ptr, NULL); | |
27d69105 | 1383 | call_rcu(&mdev->rcu, mpls_dev_destroy_rcu); |
c89359a4 | 1384 | } |
0189197f | 1385 | break; |
0fae3bf0 RS |
1386 | case NETDEV_CHANGENAME: |
1387 | mdev = mpls_dev_get(dev); | |
1388 | if (mdev) { | |
1389 | int err; | |
1390 | ||
1391 | mpls_dev_sysctl_unregister(mdev); | |
1392 | err = mpls_dev_sysctl_register(dev, mdev); | |
1393 | if (err) | |
1394 | return notifier_from_errno(err); | |
1395 | } | |
1396 | break; | |
0189197f EB |
1397 | } |
1398 | return NOTIFY_OK; | |
1399 | } | |
1400 | ||
1401 | static struct notifier_block mpls_dev_notifier = { | |
1402 | .notifier_call = mpls_dev_notify, | |
1403 | }; | |
1404 | ||
03c05665 | 1405 | static int nla_put_via(struct sk_buff *skb, |
b79bda3d | 1406 | u8 table, const void *addr, int alen) |
03c05665 | 1407 | { |
b79bda3d EB |
1408 | static const int table_to_family[NEIGH_NR_TABLES + 1] = { |
1409 | AF_INET, AF_INET6, AF_DECnet, AF_PACKET, | |
1410 | }; | |
03c05665 EB |
1411 | struct nlattr *nla; |
1412 | struct rtvia *via; | |
b79bda3d | 1413 | int family = AF_UNSPEC; |
03c05665 EB |
1414 | |
1415 | nla = nla_reserve(skb, RTA_VIA, alen + 2); | |
1416 | if (!nla) | |
1417 | return -EMSGSIZE; | |
1418 | ||
b79bda3d EB |
1419 | if (table <= NEIGH_NR_TABLES) |
1420 | family = table_to_family[table]; | |
1421 | ||
03c05665 EB |
1422 | via = nla_data(nla); |
1423 | via->rtvia_family = family; | |
1424 | memcpy(via->rtvia_addr, addr, alen); | |
1425 | return 0; | |
1426 | } | |
1427 | ||
966bae33 EB |
1428 | int nla_put_labels(struct sk_buff *skb, int attrtype, |
1429 | u8 labels, const u32 label[]) | |
1430 | { | |
1431 | struct nlattr *nla; | |
1432 | struct mpls_shim_hdr *nla_label; | |
1433 | bool bos; | |
1434 | int i; | |
1435 | nla = nla_reserve(skb, attrtype, labels*4); | |
1436 | if (!nla) | |
1437 | return -EMSGSIZE; | |
1438 | ||
1439 | nla_label = nla_data(nla); | |
1440 | bos = true; | |
1441 | for (i = labels - 1; i >= 0; i--) { | |
1442 | nla_label[i] = mpls_entry_encode(label[i], 0, 0, bos); | |
1443 | bos = false; | |
1444 | } | |
1445 | ||
1446 | return 0; | |
1447 | } | |
face0188 | 1448 | EXPORT_SYMBOL_GPL(nla_put_labels); |
966bae33 EB |
1449 | |
1450 | int nla_get_labels(const struct nlattr *nla, | |
f8efb73c | 1451 | u32 max_labels, u8 *labels, u32 label[]) |
966bae33 EB |
1452 | { |
1453 | unsigned len = nla_len(nla); | |
1454 | unsigned nla_labels; | |
1455 | struct mpls_shim_hdr *nla_label; | |
1456 | bool bos; | |
1457 | int i; | |
1458 | ||
1459 | /* len needs to be an even multiple of 4 (the label size) */ | |
1460 | if (len & 3) | |
1461 | return -EINVAL; | |
1462 | ||
1463 | /* Limit the number of new labels allowed */ | |
1464 | nla_labels = len/4; | |
1465 | if (nla_labels > max_labels) | |
1466 | return -EINVAL; | |
1467 | ||
1468 | nla_label = nla_data(nla); | |
1469 | bos = true; | |
1470 | for (i = nla_labels - 1; i >= 0; i--, bos = false) { | |
1471 | struct mpls_entry_decoded dec; | |
1472 | dec = mpls_entry_decode(nla_label + i); | |
1473 | ||
1474 | /* Ensure the bottom of stack flag is properly set | |
1475 | * and ttl and tc are both clear. | |
1476 | */ | |
1477 | if ((dec.bos != bos) || dec.ttl || dec.tc) | |
1478 | return -EINVAL; | |
1479 | ||
5a9ab017 | 1480 | switch (dec.label) { |
78f5b899 | 1481 | case MPLS_LABEL_IMPLNULL: |
5a9ab017 RS |
1482 | /* RFC3032: This is a label that an LSR may |
1483 | * assign and distribute, but which never | |
1484 | * actually appears in the encapsulation. | |
1485 | */ | |
1486 | return -EINVAL; | |
1487 | } | |
1488 | ||
966bae33 EB |
1489 | label[i] = dec.label; |
1490 | } | |
1491 | *labels = nla_labels; | |
1492 | return 0; | |
1493 | } | |
face0188 | 1494 | EXPORT_SYMBOL_GPL(nla_get_labels); |
966bae33 | 1495 | |
f8efb73c RP |
1496 | int nla_get_via(const struct nlattr *nla, u8 *via_alen, |
1497 | u8 *via_table, u8 via_addr[]) | |
1498 | { | |
1499 | struct rtvia *via = nla_data(nla); | |
1500 | int err = -EINVAL; | |
1501 | int alen; | |
1502 | ||
1503 | if (nla_len(nla) < offsetof(struct rtvia, rtvia_addr)) | |
1504 | goto errout; | |
1505 | alen = nla_len(nla) - | |
1506 | offsetof(struct rtvia, rtvia_addr); | |
1507 | if (alen > MAX_VIA_ALEN) | |
1508 | goto errout; | |
1509 | ||
1510 | /* Validate the address family */ | |
1511 | switch (via->rtvia_family) { | |
1512 | case AF_PACKET: | |
1513 | *via_table = NEIGH_LINK_TABLE; | |
1514 | break; | |
1515 | case AF_INET: | |
1516 | *via_table = NEIGH_ARP_TABLE; | |
1517 | if (alen != 4) | |
1518 | goto errout; | |
1519 | break; | |
1520 | case AF_INET6: | |
1521 | *via_table = NEIGH_ND_TABLE; | |
1522 | if (alen != 16) | |
1523 | goto errout; | |
1524 | break; | |
1525 | default: | |
1526 | /* Unsupported address family */ | |
1527 | goto errout; | |
1528 | } | |
1529 | ||
1530 | memcpy(via_addr, via->rtvia_addr, alen); | |
1531 | *via_alen = alen; | |
1532 | err = 0; | |
1533 | ||
1534 | errout: | |
1535 | return err; | |
1536 | } | |
1537 | ||
03c05665 EB |
1538 | static int rtm_to_route_config(struct sk_buff *skb, struct nlmsghdr *nlh, |
1539 | struct mpls_route_config *cfg) | |
1540 | { | |
1541 | struct rtmsg *rtm; | |
1542 | struct nlattr *tb[RTA_MAX+1]; | |
1543 | int index; | |
1544 | int err; | |
1545 | ||
1546 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_mpls_policy); | |
1547 | if (err < 0) | |
1548 | goto errout; | |
1549 | ||
1550 | err = -EINVAL; | |
1551 | rtm = nlmsg_data(nlh); | |
1552 | memset(cfg, 0, sizeof(*cfg)); | |
1553 | ||
1554 | if (rtm->rtm_family != AF_MPLS) | |
1555 | goto errout; | |
1556 | if (rtm->rtm_dst_len != 20) | |
1557 | goto errout; | |
1558 | if (rtm->rtm_src_len != 0) | |
1559 | goto errout; | |
1560 | if (rtm->rtm_tos != 0) | |
1561 | goto errout; | |
1562 | if (rtm->rtm_table != RT_TABLE_MAIN) | |
1563 | goto errout; | |
1564 | /* Any value is acceptable for rtm_protocol */ | |
1565 | ||
1566 | /* As mpls uses destination specific addresses | |
1567 | * (or source specific address in the case of multicast) | |
1568 | * all addresses have universal scope. | |
1569 | */ | |
1570 | if (rtm->rtm_scope != RT_SCOPE_UNIVERSE) | |
1571 | goto errout; | |
1572 | if (rtm->rtm_type != RTN_UNICAST) | |
1573 | goto errout; | |
1574 | if (rtm->rtm_flags != 0) | |
1575 | goto errout; | |
1576 | ||
1577 | cfg->rc_label = LABEL_NOT_SPECIFIED; | |
1578 | cfg->rc_protocol = rtm->rtm_protocol; | |
eb7809f0 | 1579 | cfg->rc_via_table = MPLS_NEIGH_TABLE_UNSPEC; |
03c05665 EB |
1580 | cfg->rc_nlflags = nlh->nlmsg_flags; |
1581 | cfg->rc_nlinfo.portid = NETLINK_CB(skb).portid; | |
1582 | cfg->rc_nlinfo.nlh = nlh; | |
1583 | cfg->rc_nlinfo.nl_net = sock_net(skb->sk); | |
1584 | ||
1585 | for (index = 0; index <= RTA_MAX; index++) { | |
1586 | struct nlattr *nla = tb[index]; | |
1587 | if (!nla) | |
1588 | continue; | |
1589 | ||
14dd3e1b | 1590 | switch (index) { |
03c05665 EB |
1591 | case RTA_OIF: |
1592 | cfg->rc_ifindex = nla_get_u32(nla); | |
1593 | break; | |
1594 | case RTA_NEWDST: | |
1595 | if (nla_get_labels(nla, MAX_NEW_LABELS, | |
1596 | &cfg->rc_output_labels, | |
1597 | cfg->rc_output_label)) | |
1598 | goto errout; | |
1599 | break; | |
1600 | case RTA_DST: | |
1601 | { | |
f8efb73c | 1602 | u8 label_count; |
03c05665 EB |
1603 | if (nla_get_labels(nla, 1, &label_count, |
1604 | &cfg->rc_label)) | |
1605 | goto errout; | |
1606 | ||
a6affd24 RS |
1607 | /* Reserved labels may not be set */ |
1608 | if (cfg->rc_label < MPLS_LABEL_FIRST_UNRESERVED) | |
03c05665 EB |
1609 | goto errout; |
1610 | ||
1611 | break; | |
1612 | } | |
1613 | case RTA_VIA: | |
1614 | { | |
f8efb73c RP |
1615 | if (nla_get_via(nla, &cfg->rc_via_alen, |
1616 | &cfg->rc_via_table, cfg->rc_via)) | |
03c05665 | 1617 | goto errout; |
f8efb73c RP |
1618 | break; |
1619 | } | |
1620 | case RTA_MULTIPATH: | |
1621 | { | |
1622 | cfg->rc_mp = nla_data(nla); | |
1623 | cfg->rc_mp_len = nla_len(nla); | |
03c05665 EB |
1624 | break; |
1625 | } | |
1626 | default: | |
1627 | /* Unsupported attribute */ | |
1628 | goto errout; | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | err = 0; | |
1633 | errout: | |
1634 | return err; | |
1635 | } | |
1636 | ||
1637 | static int mpls_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1638 | { | |
1639 | struct mpls_route_config cfg; | |
1640 | int err; | |
1641 | ||
1642 | err = rtm_to_route_config(skb, nlh, &cfg); | |
1643 | if (err < 0) | |
1644 | return err; | |
1645 | ||
1646 | return mpls_route_del(&cfg); | |
1647 | } | |
1648 | ||
1649 | ||
1650 | static int mpls_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1651 | { | |
1652 | struct mpls_route_config cfg; | |
1653 | int err; | |
1654 | ||
1655 | err = rtm_to_route_config(skb, nlh, &cfg); | |
1656 | if (err < 0) | |
1657 | return err; | |
1658 | ||
1659 | return mpls_route_add(&cfg); | |
1660 | } | |
1661 | ||
1662 | static int mpls_dump_route(struct sk_buff *skb, u32 portid, u32 seq, int event, | |
1663 | u32 label, struct mpls_route *rt, int flags) | |
1664 | { | |
19d0c341 | 1665 | struct net_device *dev; |
03c05665 EB |
1666 | struct nlmsghdr *nlh; |
1667 | struct rtmsg *rtm; | |
1668 | ||
1669 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*rtm), flags); | |
1670 | if (nlh == NULL) | |
1671 | return -EMSGSIZE; | |
1672 | ||
1673 | rtm = nlmsg_data(nlh); | |
1674 | rtm->rtm_family = AF_MPLS; | |
1675 | rtm->rtm_dst_len = 20; | |
1676 | rtm->rtm_src_len = 0; | |
1677 | rtm->rtm_tos = 0; | |
1678 | rtm->rtm_table = RT_TABLE_MAIN; | |
1679 | rtm->rtm_protocol = rt->rt_protocol; | |
1680 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; | |
1681 | rtm->rtm_type = RTN_UNICAST; | |
1682 | rtm->rtm_flags = 0; | |
1683 | ||
03c05665 EB |
1684 | if (nla_put_labels(skb, RTA_DST, 1, &label)) |
1685 | goto nla_put_failure; | |
f8efb73c | 1686 | if (rt->rt_nhn == 1) { |
cf4b24f0 | 1687 | const struct mpls_nh *nh = rt->rt_nh; |
f8efb73c RP |
1688 | |
1689 | if (nh->nh_labels && | |
1690 | nla_put_labels(skb, RTA_NEWDST, nh->nh_labels, | |
1691 | nh->nh_label)) | |
1692 | goto nla_put_failure; | |
eb7809f0 | 1693 | if (nh->nh_via_table != MPLS_NEIGH_TABLE_UNSPEC && |
72dcac96 | 1694 | nla_put_via(skb, nh->nh_via_table, mpls_nh_via(rt, nh), |
f8efb73c RP |
1695 | nh->nh_via_alen)) |
1696 | goto nla_put_failure; | |
1697 | dev = rtnl_dereference(nh->nh_dev); | |
1698 | if (dev && nla_put_u32(skb, RTA_OIF, dev->ifindex)) | |
1699 | goto nla_put_failure; | |
c89359a4 RP |
1700 | if (nh->nh_flags & RTNH_F_LINKDOWN) |
1701 | rtm->rtm_flags |= RTNH_F_LINKDOWN; | |
1702 | if (nh->nh_flags & RTNH_F_DEAD) | |
1703 | rtm->rtm_flags |= RTNH_F_DEAD; | |
f8efb73c RP |
1704 | } else { |
1705 | struct rtnexthop *rtnh; | |
1706 | struct nlattr *mp; | |
c89359a4 RP |
1707 | int dead = 0; |
1708 | int linkdown = 0; | |
f8efb73c RP |
1709 | |
1710 | mp = nla_nest_start(skb, RTA_MULTIPATH); | |
1711 | if (!mp) | |
1712 | goto nla_put_failure; | |
1713 | ||
1714 | for_nexthops(rt) { | |
1715 | rtnh = nla_reserve_nohdr(skb, sizeof(*rtnh)); | |
1716 | if (!rtnh) | |
1717 | goto nla_put_failure; | |
1718 | ||
1719 | dev = rtnl_dereference(nh->nh_dev); | |
1720 | if (dev) | |
1721 | rtnh->rtnh_ifindex = dev->ifindex; | |
c89359a4 RP |
1722 | if (nh->nh_flags & RTNH_F_LINKDOWN) { |
1723 | rtnh->rtnh_flags |= RTNH_F_LINKDOWN; | |
1724 | linkdown++; | |
1725 | } | |
1726 | if (nh->nh_flags & RTNH_F_DEAD) { | |
1727 | rtnh->rtnh_flags |= RTNH_F_DEAD; | |
1728 | dead++; | |
1729 | } | |
1730 | ||
f8efb73c RP |
1731 | if (nh->nh_labels && nla_put_labels(skb, RTA_NEWDST, |
1732 | nh->nh_labels, | |
1733 | nh->nh_label)) | |
1734 | goto nla_put_failure; | |
f20367df RS |
1735 | if (nh->nh_via_table != MPLS_NEIGH_TABLE_UNSPEC && |
1736 | nla_put_via(skb, nh->nh_via_table, | |
cf4b24f0 | 1737 | mpls_nh_via(rt, nh), |
f8efb73c RP |
1738 | nh->nh_via_alen)) |
1739 | goto nla_put_failure; | |
1740 | ||
1741 | /* length of rtnetlink header + attributes */ | |
1742 | rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *)rtnh; | |
1743 | } endfor_nexthops(rt); | |
1744 | ||
c89359a4 RP |
1745 | if (linkdown == rt->rt_nhn) |
1746 | rtm->rtm_flags |= RTNH_F_LINKDOWN; | |
1747 | if (dead == rt->rt_nhn) | |
1748 | rtm->rtm_flags |= RTNH_F_DEAD; | |
1749 | ||
f8efb73c RP |
1750 | nla_nest_end(skb, mp); |
1751 | } | |
03c05665 EB |
1752 | |
1753 | nlmsg_end(skb, nlh); | |
1754 | return 0; | |
1755 | ||
1756 | nla_put_failure: | |
1757 | nlmsg_cancel(skb, nlh); | |
1758 | return -EMSGSIZE; | |
1759 | } | |
1760 | ||
1761 | static int mpls_dump_routes(struct sk_buff *skb, struct netlink_callback *cb) | |
1762 | { | |
1763 | struct net *net = sock_net(skb->sk); | |
19d0c341 EB |
1764 | struct mpls_route __rcu **platform_label; |
1765 | size_t platform_labels; | |
03c05665 EB |
1766 | unsigned int index; |
1767 | ||
1768 | ASSERT_RTNL(); | |
1769 | ||
1770 | index = cb->args[0]; | |
a6affd24 RS |
1771 | if (index < MPLS_LABEL_FIRST_UNRESERVED) |
1772 | index = MPLS_LABEL_FIRST_UNRESERVED; | |
03c05665 | 1773 | |
19d0c341 EB |
1774 | platform_label = rtnl_dereference(net->mpls.platform_label); |
1775 | platform_labels = net->mpls.platform_labels; | |
1776 | for (; index < platform_labels; index++) { | |
03c05665 | 1777 | struct mpls_route *rt; |
19d0c341 | 1778 | rt = rtnl_dereference(platform_label[index]); |
03c05665 EB |
1779 | if (!rt) |
1780 | continue; | |
1781 | ||
1782 | if (mpls_dump_route(skb, NETLINK_CB(cb->skb).portid, | |
1783 | cb->nlh->nlmsg_seq, RTM_NEWROUTE, | |
1784 | index, rt, NLM_F_MULTI) < 0) | |
1785 | break; | |
1786 | } | |
1787 | cb->args[0] = index; | |
1788 | ||
1789 | return skb->len; | |
1790 | } | |
1791 | ||
8de147dc EB |
1792 | static inline size_t lfib_nlmsg_size(struct mpls_route *rt) |
1793 | { | |
1794 | size_t payload = | |
1795 | NLMSG_ALIGN(sizeof(struct rtmsg)) | |
8de147dc | 1796 | + nla_total_size(4); /* RTA_DST */ |
f8efb73c RP |
1797 | |
1798 | if (rt->rt_nhn == 1) { | |
1799 | struct mpls_nh *nh = rt->rt_nh; | |
1800 | ||
1801 | if (nh->nh_dev) | |
1802 | payload += nla_total_size(4); /* RTA_OIF */ | |
eb7809f0 | 1803 | if (nh->nh_via_table != MPLS_NEIGH_TABLE_UNSPEC) /* RTA_VIA */ |
72dcac96 | 1804 | payload += nla_total_size(2 + nh->nh_via_alen); |
f8efb73c RP |
1805 | if (nh->nh_labels) /* RTA_NEWDST */ |
1806 | payload += nla_total_size(nh->nh_labels * 4); | |
1807 | } else { | |
1808 | /* each nexthop is packed in an attribute */ | |
1809 | size_t nhsize = 0; | |
1810 | ||
1811 | for_nexthops(rt) { | |
1812 | nhsize += nla_total_size(sizeof(struct rtnexthop)); | |
f20367df RS |
1813 | /* RTA_VIA */ |
1814 | if (nh->nh_via_table != MPLS_NEIGH_TABLE_UNSPEC) | |
1815 | nhsize += nla_total_size(2 + nh->nh_via_alen); | |
f8efb73c RP |
1816 | if (nh->nh_labels) |
1817 | nhsize += nla_total_size(nh->nh_labels * 4); | |
1818 | } endfor_nexthops(rt); | |
1819 | /* nested attribute */ | |
1820 | payload += nla_total_size(nhsize); | |
1821 | } | |
1822 | ||
8de147dc EB |
1823 | return payload; |
1824 | } | |
1825 | ||
1826 | static void rtmsg_lfib(int event, u32 label, struct mpls_route *rt, | |
1827 | struct nlmsghdr *nlh, struct net *net, u32 portid, | |
1828 | unsigned int nlm_flags) | |
1829 | { | |
1830 | struct sk_buff *skb; | |
1831 | u32 seq = nlh ? nlh->nlmsg_seq : 0; | |
1832 | int err = -ENOBUFS; | |
1833 | ||
1834 | skb = nlmsg_new(lfib_nlmsg_size(rt), GFP_KERNEL); | |
1835 | if (skb == NULL) | |
1836 | goto errout; | |
1837 | ||
1838 | err = mpls_dump_route(skb, portid, seq, event, label, rt, nlm_flags); | |
1839 | if (err < 0) { | |
1840 | /* -EMSGSIZE implies BUG in lfib_nlmsg_size */ | |
1841 | WARN_ON(err == -EMSGSIZE); | |
1842 | kfree_skb(skb); | |
1843 | goto errout; | |
1844 | } | |
1845 | rtnl_notify(skb, net, portid, RTNLGRP_MPLS_ROUTE, nlh, GFP_KERNEL); | |
1846 | ||
1847 | return; | |
1848 | errout: | |
1849 | if (err < 0) | |
1850 | rtnl_set_sk_err(net, RTNLGRP_MPLS_ROUTE, err); | |
1851 | } | |
1852 | ||
7720c01f EB |
1853 | static int resize_platform_label_table(struct net *net, size_t limit) |
1854 | { | |
1855 | size_t size = sizeof(struct mpls_route *) * limit; | |
1856 | size_t old_limit; | |
1857 | size_t cp_size; | |
1858 | struct mpls_route __rcu **labels = NULL, **old; | |
1859 | struct mpls_route *rt0 = NULL, *rt2 = NULL; | |
1860 | unsigned index; | |
1861 | ||
1862 | if (size) { | |
1863 | labels = kzalloc(size, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY); | |
1864 | if (!labels) | |
1865 | labels = vzalloc(size); | |
1866 | ||
1867 | if (!labels) | |
1868 | goto nolabels; | |
1869 | } | |
1870 | ||
1871 | /* In case the predefined labels need to be populated */ | |
78f5b899 | 1872 | if (limit > MPLS_LABEL_IPV4NULL) { |
7720c01f | 1873 | struct net_device *lo = net->loopback_dev; |
cf4b24f0 | 1874 | rt0 = mpls_rt_alloc(1, lo->addr_len); |
7720c01f EB |
1875 | if (!rt0) |
1876 | goto nort0; | |
f8efb73c | 1877 | RCU_INIT_POINTER(rt0->rt_nh->nh_dev, lo); |
7720c01f | 1878 | rt0->rt_protocol = RTPROT_KERNEL; |
118d5234 | 1879 | rt0->rt_payload_type = MPT_IPV4; |
f8efb73c | 1880 | rt0->rt_nh->nh_via_table = NEIGH_LINK_TABLE; |
b4e04fc7 | 1881 | rt0->rt_nh->nh_via_alen = lo->addr_len; |
cf4b24f0 RS |
1882 | memcpy(__mpls_nh_via(rt0, rt0->rt_nh), lo->dev_addr, |
1883 | lo->addr_len); | |
7720c01f | 1884 | } |
78f5b899 | 1885 | if (limit > MPLS_LABEL_IPV6NULL) { |
7720c01f | 1886 | struct net_device *lo = net->loopback_dev; |
cf4b24f0 | 1887 | rt2 = mpls_rt_alloc(1, lo->addr_len); |
7720c01f EB |
1888 | if (!rt2) |
1889 | goto nort2; | |
f8efb73c | 1890 | RCU_INIT_POINTER(rt2->rt_nh->nh_dev, lo); |
7720c01f | 1891 | rt2->rt_protocol = RTPROT_KERNEL; |
118d5234 | 1892 | rt2->rt_payload_type = MPT_IPV6; |
f8efb73c | 1893 | rt2->rt_nh->nh_via_table = NEIGH_LINK_TABLE; |
b4e04fc7 | 1894 | rt2->rt_nh->nh_via_alen = lo->addr_len; |
cf4b24f0 RS |
1895 | memcpy(__mpls_nh_via(rt2, rt2->rt_nh), lo->dev_addr, |
1896 | lo->addr_len); | |
7720c01f EB |
1897 | } |
1898 | ||
1899 | rtnl_lock(); | |
1900 | /* Remember the original table */ | |
19d0c341 | 1901 | old = rtnl_dereference(net->mpls.platform_label); |
7720c01f EB |
1902 | old_limit = net->mpls.platform_labels; |
1903 | ||
1904 | /* Free any labels beyond the new table */ | |
1905 | for (index = limit; index < old_limit; index++) | |
f8efb73c | 1906 | mpls_route_update(net, index, NULL, NULL); |
7720c01f EB |
1907 | |
1908 | /* Copy over the old labels */ | |
1909 | cp_size = size; | |
1910 | if (old_limit < limit) | |
1911 | cp_size = old_limit * sizeof(struct mpls_route *); | |
1912 | ||
1913 | memcpy(labels, old, cp_size); | |
1914 | ||
1915 | /* If needed set the predefined labels */ | |
78f5b899 TH |
1916 | if ((old_limit <= MPLS_LABEL_IPV6NULL) && |
1917 | (limit > MPLS_LABEL_IPV6NULL)) { | |
1918 | RCU_INIT_POINTER(labels[MPLS_LABEL_IPV6NULL], rt2); | |
7720c01f EB |
1919 | rt2 = NULL; |
1920 | } | |
1921 | ||
78f5b899 TH |
1922 | if ((old_limit <= MPLS_LABEL_IPV4NULL) && |
1923 | (limit > MPLS_LABEL_IPV4NULL)) { | |
1924 | RCU_INIT_POINTER(labels[MPLS_LABEL_IPV4NULL], rt0); | |
7720c01f EB |
1925 | rt0 = NULL; |
1926 | } | |
1927 | ||
1928 | /* Update the global pointers */ | |
1929 | net->mpls.platform_labels = limit; | |
19d0c341 | 1930 | rcu_assign_pointer(net->mpls.platform_label, labels); |
7720c01f EB |
1931 | |
1932 | rtnl_unlock(); | |
1933 | ||
1934 | mpls_rt_free(rt2); | |
1935 | mpls_rt_free(rt0); | |
1936 | ||
1937 | if (old) { | |
1938 | synchronize_rcu(); | |
1939 | kvfree(old); | |
1940 | } | |
1941 | return 0; | |
1942 | ||
1943 | nort2: | |
1944 | mpls_rt_free(rt0); | |
1945 | nort0: | |
1946 | kvfree(labels); | |
1947 | nolabels: | |
1948 | return -ENOMEM; | |
1949 | } | |
1950 | ||
1951 | static int mpls_platform_labels(struct ctl_table *table, int write, | |
1952 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1953 | { | |
1954 | struct net *net = table->data; | |
1955 | int platform_labels = net->mpls.platform_labels; | |
1956 | int ret; | |
1957 | struct ctl_table tmp = { | |
1958 | .procname = table->procname, | |
1959 | .data = &platform_labels, | |
1960 | .maxlen = sizeof(int), | |
1961 | .mode = table->mode, | |
1962 | .extra1 = &zero, | |
1963 | .extra2 = &label_limit, | |
1964 | }; | |
1965 | ||
1966 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
1967 | ||
1968 | if (write && ret == 0) | |
1969 | ret = resize_platform_label_table(net, platform_labels); | |
1970 | ||
1971 | return ret; | |
1972 | } | |
1973 | ||
37bde799 | 1974 | static const struct ctl_table mpls_table[] = { |
7720c01f EB |
1975 | { |
1976 | .procname = "platform_labels", | |
1977 | .data = NULL, | |
1978 | .maxlen = sizeof(int), | |
1979 | .mode = 0644, | |
1980 | .proc_handler = mpls_platform_labels, | |
1981 | }, | |
1982 | { } | |
1983 | }; | |
1984 | ||
0189197f EB |
1985 | static int mpls_net_init(struct net *net) |
1986 | { | |
7720c01f EB |
1987 | struct ctl_table *table; |
1988 | ||
0189197f EB |
1989 | net->mpls.platform_labels = 0; |
1990 | net->mpls.platform_label = NULL; | |
1991 | ||
7720c01f EB |
1992 | table = kmemdup(mpls_table, sizeof(mpls_table), GFP_KERNEL); |
1993 | if (table == NULL) | |
1994 | return -ENOMEM; | |
1995 | ||
1996 | table[0].data = net; | |
1997 | net->mpls.ctl = register_net_sysctl(net, "net/mpls", table); | |
6ea3c9d5 NA |
1998 | if (net->mpls.ctl == NULL) { |
1999 | kfree(table); | |
7720c01f | 2000 | return -ENOMEM; |
6ea3c9d5 | 2001 | } |
7720c01f | 2002 | |
0189197f EB |
2003 | return 0; |
2004 | } | |
2005 | ||
2006 | static void mpls_net_exit(struct net *net) | |
2007 | { | |
19d0c341 EB |
2008 | struct mpls_route __rcu **platform_label; |
2009 | size_t platform_labels; | |
7720c01f | 2010 | struct ctl_table *table; |
0189197f EB |
2011 | unsigned int index; |
2012 | ||
7720c01f EB |
2013 | table = net->mpls.ctl->ctl_table_arg; |
2014 | unregister_net_sysctl_table(net->mpls.ctl); | |
2015 | kfree(table); | |
2016 | ||
19d0c341 EB |
2017 | /* An rcu grace period has passed since there was a device in |
2018 | * the network namespace (and thus the last in flight packet) | |
0189197f EB |
2019 | * left this network namespace. This is because |
2020 | * unregister_netdevice_many and netdev_run_todo has completed | |
2021 | * for each network device that was in this network namespace. | |
2022 | * | |
2023 | * As such no additional rcu synchronization is necessary when | |
2024 | * freeing the platform_label table. | |
2025 | */ | |
2026 | rtnl_lock(); | |
19d0c341 EB |
2027 | platform_label = rtnl_dereference(net->mpls.platform_label); |
2028 | platform_labels = net->mpls.platform_labels; | |
2029 | for (index = 0; index < platform_labels; index++) { | |
2030 | struct mpls_route *rt = rtnl_dereference(platform_label[index]); | |
2031 | RCU_INIT_POINTER(platform_label[index], NULL); | |
e37791ec | 2032 | mpls_notify_route(net, index, rt, NULL, NULL); |
0189197f EB |
2033 | mpls_rt_free(rt); |
2034 | } | |
2035 | rtnl_unlock(); | |
2036 | ||
19d0c341 | 2037 | kvfree(platform_label); |
0189197f EB |
2038 | } |
2039 | ||
2040 | static struct pernet_operations mpls_net_ops = { | |
2041 | .init = mpls_net_init, | |
2042 | .exit = mpls_net_exit, | |
2043 | }; | |
2044 | ||
27d69105 RS |
2045 | static struct rtnl_af_ops mpls_af_ops __read_mostly = { |
2046 | .family = AF_MPLS, | |
2047 | .fill_stats_af = mpls_fill_stats_af, | |
2048 | .get_stats_af_size = mpls_get_stats_af_size, | |
2049 | }; | |
2050 | ||
0189197f EB |
2051 | static int __init mpls_init(void) |
2052 | { | |
2053 | int err; | |
2054 | ||
2055 | BUILD_BUG_ON(sizeof(struct mpls_shim_hdr) != 4); | |
2056 | ||
2057 | err = register_pernet_subsys(&mpls_net_ops); | |
2058 | if (err) | |
2059 | goto out; | |
2060 | ||
2061 | err = register_netdevice_notifier(&mpls_dev_notifier); | |
2062 | if (err) | |
2063 | goto out_unregister_pernet; | |
2064 | ||
2065 | dev_add_pack(&mpls_packet_type); | |
2066 | ||
27d69105 RS |
2067 | rtnl_af_register(&mpls_af_ops); |
2068 | ||
03c05665 EB |
2069 | rtnl_register(PF_MPLS, RTM_NEWROUTE, mpls_rtm_newroute, NULL, NULL); |
2070 | rtnl_register(PF_MPLS, RTM_DELROUTE, mpls_rtm_delroute, NULL, NULL); | |
2071 | rtnl_register(PF_MPLS, RTM_GETROUTE, NULL, mpls_dump_routes, NULL); | |
24045a03 DA |
2072 | rtnl_register(PF_MPLS, RTM_GETNETCONF, mpls_netconf_get_devconf, |
2073 | mpls_netconf_dump_devconf, NULL); | |
0189197f EB |
2074 | err = 0; |
2075 | out: | |
2076 | return err; | |
2077 | ||
2078 | out_unregister_pernet: | |
2079 | unregister_pernet_subsys(&mpls_net_ops); | |
2080 | goto out; | |
2081 | } | |
2082 | module_init(mpls_init); | |
2083 | ||
2084 | static void __exit mpls_exit(void) | |
2085 | { | |
03c05665 | 2086 | rtnl_unregister_all(PF_MPLS); |
27d69105 | 2087 | rtnl_af_unregister(&mpls_af_ops); |
0189197f EB |
2088 | dev_remove_pack(&mpls_packet_type); |
2089 | unregister_netdevice_notifier(&mpls_dev_notifier); | |
2090 | unregister_pernet_subsys(&mpls_net_ops); | |
2091 | } | |
2092 | module_exit(mpls_exit); | |
2093 | ||
2094 | MODULE_DESCRIPTION("MultiProtocol Label Switching"); | |
2095 | MODULE_LICENSE("GPL v2"); | |
2096 | MODULE_ALIAS_NETPROTO(PF_MPLS); |