Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
193125db DA |
2 | /* |
3 | * vrf.c: device driver to encapsulate a VRF space | |
4 | * | |
5 | * Copyright (c) 2015 Cumulus Networks. All rights reserved. | |
6 | * Copyright (c) 2015 Shrijeet Mukherjee <shm@cumulusnetworks.com> | |
7 | * Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com> | |
8 | * | |
9 | * Based on dummy, team and ipvlan drivers | |
193125db DA |
10 | */ |
11 | ||
cc69837f | 12 | #include <linux/ethtool.h> |
193125db DA |
13 | #include <linux/module.h> |
14 | #include <linux/kernel.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/etherdevice.h> | |
17 | #include <linux/ip.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/moduleparam.h> | |
20 | #include <linux/netfilter.h> | |
21 | #include <linux/rtnetlink.h> | |
22 | #include <net/rtnetlink.h> | |
23 | #include <linux/u64_stats_sync.h> | |
24 | #include <linux/hashtable.h> | |
c8baec38 | 25 | #include <linux/spinlock_types.h> |
193125db DA |
26 | |
27 | #include <linux/inetdevice.h> | |
8f58336d | 28 | #include <net/arp.h> |
193125db DA |
29 | #include <net/ip.h> |
30 | #include <net/ip_fib.h> | |
35402e31 | 31 | #include <net/ip6_fib.h> |
193125db | 32 | #include <net/ip6_route.h> |
193125db DA |
33 | #include <net/route.h> |
34 | #include <net/addrconf.h> | |
ee15ee5d | 35 | #include <net/l3mdev.h> |
1aa6c4f6 | 36 | #include <net/fib_rules.h> |
b6459415 | 37 | #include <net/sch_generic.h> |
097d3c95 | 38 | #include <net/netns/generic.h> |
8c9c296a | 39 | #include <net/netfilter/nf_conntrack.h> |
193125db DA |
40 | |
41 | #define DRV_NAME "vrf" | |
c8baec38 | 42 | #define DRV_VERSION "1.1" |
193125db | 43 | |
1aa6c4f6 | 44 | #define FIB_RULE_PREF 1000 /* default preference for FIB rules */ |
097d3c95 | 45 | |
c8baec38 AM |
46 | #define HT_MAP_BITS 4 |
47 | #define HASH_INITVAL ((u32)0xcafef00d) | |
48 | ||
49 | struct vrf_map { | |
50 | DECLARE_HASHTABLE(ht, HT_MAP_BITS); | |
51 | spinlock_t vmap_lock; | |
52 | ||
53 | /* shared_tables: | |
54 | * count how many distinct tables do not comply with the strict mode | |
55 | * requirement. | |
56 | * shared_tables value must be 0 in order to enable the strict mode. | |
57 | * | |
58 | * example of the evolution of shared_tables: | |
59 | * | time | |
60 | * add vrf0 --> table 100 shared_tables = 0 | t0 | |
61 | * add vrf1 --> table 101 shared_tables = 0 | t1 | |
62 | * add vrf2 --> table 100 shared_tables = 1 | t2 | |
63 | * add vrf3 --> table 100 shared_tables = 1 | t3 | |
64 | * add vrf4 --> table 101 shared_tables = 2 v t4 | |
65 | * | |
66 | * shared_tables is a "step function" (or "staircase function") | |
67 | * and it is increased by one when the second vrf is associated to a | |
68 | * table. | |
69 | * | |
70 | * at t2, vrf0 and vrf2 are bound to table 100: shared_tables = 1. | |
71 | * | |
72 | * at t3, another dev (vrf3) is bound to the same table 100 but the | |
73 | * value of shared_tables is still 1. | |
74 | * This means that no matter how many new vrfs will register on the | |
75 | * table 100, the shared_tables will not increase (considering only | |
76 | * table 100). | |
77 | * | |
78 | * at t4, vrf4 is bound to table 101, and shared_tables = 2. | |
79 | * | |
80 | * Looking at the value of shared_tables we can immediately know if | |
81 | * the strict_mode can or cannot be enforced. Indeed, strict_mode | |
82 | * can be enforced iff shared_tables = 0. | |
83 | * | |
84 | * Conversely, shared_tables is decreased when a vrf is de-associated | |
85 | * from a table with exactly two associated vrfs. | |
86 | */ | |
87 | u32 shared_tables; | |
88 | ||
89 | bool strict_mode; | |
90 | }; | |
91 | ||
92 | struct vrf_map_elem { | |
93 | struct hlist_node hnode; | |
94 | struct list_head vrf_list; /* VRFs registered to this table */ | |
95 | ||
96 | u32 table_id; | |
97 | int users; | |
98 | int ifindex; | |
99 | }; | |
100 | ||
097d3c95 | 101 | static unsigned int vrf_net_id; |
1aa6c4f6 | 102 | |
c8baec38 AM |
103 | /* per netns vrf data */ |
104 | struct netns_vrf { | |
105 | /* protected by rtnl lock */ | |
106 | bool add_fib_rules; | |
107 | ||
108 | struct vrf_map vmap; | |
33306f1a | 109 | struct ctl_table_header *ctl_hdr; |
c8baec38 AM |
110 | }; |
111 | ||
ec539514 | 112 | struct net_vrf { |
b0e95ccd DA |
113 | struct rtable __rcu *rth; |
114 | struct rt6_info __rcu *rt6; | |
43b059a3 DA |
115 | #if IS_ENABLED(CONFIG_IPV6) |
116 | struct fib6_table *fib6_table; | |
117 | #endif | |
ec539514 | 118 | u32 tb_id; |
c8baec38 AM |
119 | |
120 | struct list_head me_list; /* entry in vrf_map_elem */ | |
121 | int ifindex; | |
ec539514 DA |
122 | }; |
123 | ||
193125db DA |
124 | struct pcpu_dstats { |
125 | u64 tx_pkts; | |
126 | u64 tx_bytes; | |
127 | u64 tx_drps; | |
128 | u64 rx_pkts; | |
129 | u64 rx_bytes; | |
afe80a49 | 130 | u64 rx_drps; |
193125db DA |
131 | struct u64_stats_sync syncp; |
132 | }; | |
133 | ||
afe80a49 DA |
134 | static void vrf_rx_stats(struct net_device *dev, int len) |
135 | { | |
136 | struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats); | |
137 | ||
138 | u64_stats_update_begin(&dstats->syncp); | |
139 | dstats->rx_pkts++; | |
140 | dstats->rx_bytes += len; | |
141 | u64_stats_update_end(&dstats->syncp); | |
142 | } | |
143 | ||
57b8efa1 NA |
144 | static void vrf_tx_error(struct net_device *vrf_dev, struct sk_buff *skb) |
145 | { | |
146 | vrf_dev->stats.tx_errors++; | |
147 | kfree_skb(skb); | |
148 | } | |
149 | ||
bc1f4470 | 150 | static void vrf_get_stats64(struct net_device *dev, |
151 | struct rtnl_link_stats64 *stats) | |
193125db DA |
152 | { |
153 | int i; | |
154 | ||
155 | for_each_possible_cpu(i) { | |
156 | const struct pcpu_dstats *dstats; | |
157 | u64 tbytes, tpkts, tdrops, rbytes, rpkts; | |
158 | unsigned int start; | |
159 | ||
160 | dstats = per_cpu_ptr(dev->dstats, i); | |
161 | do { | |
068c38ad | 162 | start = u64_stats_fetch_begin(&dstats->syncp); |
193125db DA |
163 | tbytes = dstats->tx_bytes; |
164 | tpkts = dstats->tx_pkts; | |
165 | tdrops = dstats->tx_drps; | |
166 | rbytes = dstats->rx_bytes; | |
167 | rpkts = dstats->rx_pkts; | |
068c38ad | 168 | } while (u64_stats_fetch_retry(&dstats->syncp, start)); |
193125db DA |
169 | stats->tx_bytes += tbytes; |
170 | stats->tx_packets += tpkts; | |
171 | stats->tx_dropped += tdrops; | |
172 | stats->rx_bytes += rbytes; | |
173 | stats->rx_packets += rpkts; | |
174 | } | |
193125db DA |
175 | } |
176 | ||
c8baec38 AM |
177 | static struct vrf_map *netns_vrf_map(struct net *net) |
178 | { | |
179 | struct netns_vrf *nn_vrf = net_generic(net, vrf_net_id); | |
180 | ||
181 | return &nn_vrf->vmap; | |
182 | } | |
183 | ||
184 | static struct vrf_map *netns_vrf_map_by_dev(struct net_device *dev) | |
185 | { | |
186 | return netns_vrf_map(dev_net(dev)); | |
187 | } | |
188 | ||
a59a8ffd AM |
189 | static int vrf_map_elem_get_vrf_ifindex(struct vrf_map_elem *me) |
190 | { | |
191 | struct list_head *me_head = &me->vrf_list; | |
192 | struct net_vrf *vrf; | |
193 | ||
194 | if (list_empty(me_head)) | |
195 | return -ENODEV; | |
196 | ||
197 | vrf = list_first_entry(me_head, struct net_vrf, me_list); | |
198 | ||
199 | return vrf->ifindex; | |
200 | } | |
201 | ||
c8baec38 AM |
202 | static struct vrf_map_elem *vrf_map_elem_alloc(gfp_t flags) |
203 | { | |
204 | struct vrf_map_elem *me; | |
205 | ||
206 | me = kmalloc(sizeof(*me), flags); | |
207 | if (!me) | |
208 | return NULL; | |
209 | ||
210 | return me; | |
211 | } | |
212 | ||
213 | static void vrf_map_elem_free(struct vrf_map_elem *me) | |
214 | { | |
215 | kfree(me); | |
216 | } | |
217 | ||
218 | static void vrf_map_elem_init(struct vrf_map_elem *me, int table_id, | |
219 | int ifindex, int users) | |
220 | { | |
221 | me->table_id = table_id; | |
222 | me->ifindex = ifindex; | |
223 | me->users = users; | |
224 | INIT_LIST_HEAD(&me->vrf_list); | |
225 | } | |
226 | ||
227 | static struct vrf_map_elem *vrf_map_lookup_elem(struct vrf_map *vmap, | |
228 | u32 table_id) | |
229 | { | |
230 | struct vrf_map_elem *me; | |
231 | u32 key; | |
232 | ||
233 | key = jhash_1word(table_id, HASH_INITVAL); | |
234 | hash_for_each_possible(vmap->ht, me, hnode, key) { | |
235 | if (me->table_id == table_id) | |
236 | return me; | |
237 | } | |
238 | ||
239 | return NULL; | |
240 | } | |
241 | ||
242 | static void vrf_map_add_elem(struct vrf_map *vmap, struct vrf_map_elem *me) | |
243 | { | |
244 | u32 table_id = me->table_id; | |
245 | u32 key; | |
246 | ||
247 | key = jhash_1word(table_id, HASH_INITVAL); | |
248 | hash_add(vmap->ht, &me->hnode, key); | |
249 | } | |
250 | ||
251 | static void vrf_map_del_elem(struct vrf_map_elem *me) | |
252 | { | |
253 | hash_del(&me->hnode); | |
254 | } | |
255 | ||
256 | static void vrf_map_lock(struct vrf_map *vmap) __acquires(&vmap->vmap_lock) | |
257 | { | |
258 | spin_lock(&vmap->vmap_lock); | |
259 | } | |
260 | ||
261 | static void vrf_map_unlock(struct vrf_map *vmap) __releases(&vmap->vmap_lock) | |
262 | { | |
263 | spin_unlock(&vmap->vmap_lock); | |
264 | } | |
265 | ||
266 | /* called with rtnl lock held */ | |
267 | static int | |
268 | vrf_map_register_dev(struct net_device *dev, struct netlink_ext_ack *extack) | |
269 | { | |
270 | struct vrf_map *vmap = netns_vrf_map_by_dev(dev); | |
271 | struct net_vrf *vrf = netdev_priv(dev); | |
272 | struct vrf_map_elem *new_me, *me; | |
273 | u32 table_id = vrf->tb_id; | |
274 | bool free_new_me = false; | |
275 | int users; | |
276 | int res; | |
277 | ||
278 | /* we pre-allocate elements used in the spin-locked section (so that we | |
e9a0bf6d | 279 | * keep the spinlock as short as possible). |
c8baec38 AM |
280 | */ |
281 | new_me = vrf_map_elem_alloc(GFP_KERNEL); | |
282 | if (!new_me) | |
283 | return -ENOMEM; | |
284 | ||
285 | vrf_map_elem_init(new_me, table_id, dev->ifindex, 0); | |
286 | ||
287 | vrf_map_lock(vmap); | |
288 | ||
289 | me = vrf_map_lookup_elem(vmap, table_id); | |
290 | if (!me) { | |
291 | me = new_me; | |
292 | vrf_map_add_elem(vmap, me); | |
293 | goto link_vrf; | |
294 | } | |
295 | ||
296 | /* we already have an entry in the vrf_map, so it means there is (at | |
297 | * least) a vrf registered on the specific table. | |
298 | */ | |
299 | free_new_me = true; | |
300 | if (vmap->strict_mode) { | |
301 | /* vrfs cannot share the same table */ | |
302 | NL_SET_ERR_MSG(extack, "Table is used by another VRF"); | |
303 | res = -EBUSY; | |
304 | goto unlock; | |
305 | } | |
306 | ||
307 | link_vrf: | |
308 | users = ++me->users; | |
309 | if (users == 2) | |
310 | ++vmap->shared_tables; | |
311 | ||
312 | list_add(&vrf->me_list, &me->vrf_list); | |
313 | ||
314 | res = 0; | |
315 | ||
316 | unlock: | |
317 | vrf_map_unlock(vmap); | |
318 | ||
319 | /* clean-up, if needed */ | |
320 | if (free_new_me) | |
321 | vrf_map_elem_free(new_me); | |
322 | ||
323 | return res; | |
324 | } | |
325 | ||
326 | /* called with rtnl lock held */ | |
327 | static void vrf_map_unregister_dev(struct net_device *dev) | |
328 | { | |
329 | struct vrf_map *vmap = netns_vrf_map_by_dev(dev); | |
330 | struct net_vrf *vrf = netdev_priv(dev); | |
331 | u32 table_id = vrf->tb_id; | |
332 | struct vrf_map_elem *me; | |
333 | int users; | |
334 | ||
335 | vrf_map_lock(vmap); | |
336 | ||
337 | me = vrf_map_lookup_elem(vmap, table_id); | |
338 | if (!me) | |
339 | goto unlock; | |
340 | ||
341 | list_del(&vrf->me_list); | |
342 | ||
343 | users = --me->users; | |
344 | if (users == 1) { | |
345 | --vmap->shared_tables; | |
346 | } else if (users == 0) { | |
347 | vrf_map_del_elem(me); | |
348 | ||
349 | /* no one will refer to this element anymore */ | |
350 | vrf_map_elem_free(me); | |
351 | } | |
352 | ||
353 | unlock: | |
354 | vrf_map_unlock(vmap); | |
355 | } | |
356 | ||
a59a8ffd AM |
357 | /* return the vrf device index associated with the table_id */ |
358 | static int vrf_ifindex_lookup_by_table_id(struct net *net, u32 table_id) | |
359 | { | |
360 | struct vrf_map *vmap = netns_vrf_map(net); | |
361 | struct vrf_map_elem *me; | |
362 | int ifindex; | |
363 | ||
364 | vrf_map_lock(vmap); | |
365 | ||
366 | if (!vmap->strict_mode) { | |
367 | ifindex = -EPERM; | |
368 | goto unlock; | |
369 | } | |
370 | ||
371 | me = vrf_map_lookup_elem(vmap, table_id); | |
372 | if (!me) { | |
373 | ifindex = -ENODEV; | |
374 | goto unlock; | |
375 | } | |
376 | ||
377 | ifindex = vrf_map_elem_get_vrf_ifindex(me); | |
378 | ||
379 | unlock: | |
380 | vrf_map_unlock(vmap); | |
381 | ||
382 | return ifindex; | |
383 | } | |
384 | ||
dcdd43c4 DA |
385 | /* by default VRF devices do not have a qdisc and are expected |
386 | * to be created with only a single queue. | |
387 | */ | |
388 | static bool qdisc_tx_is_default(const struct net_device *dev) | |
389 | { | |
390 | struct netdev_queue *txq; | |
391 | struct Qdisc *qdisc; | |
392 | ||
393 | if (dev->num_tx_queues > 1) | |
394 | return false; | |
395 | ||
396 | txq = netdev_get_tx_queue(dev, 0); | |
397 | qdisc = rcu_access_pointer(txq->qdisc); | |
398 | ||
399 | return !qdisc->enqueue; | |
400 | } | |
401 | ||
afe80a49 DA |
402 | /* Local traffic destined to local address. Reinsert the packet to rx |
403 | * path, similar to loopback handling. | |
404 | */ | |
405 | static int vrf_local_xmit(struct sk_buff *skb, struct net_device *dev, | |
406 | struct dst_entry *dst) | |
407 | { | |
408 | int len = skb->len; | |
409 | ||
410 | skb_orphan(skb); | |
411 | ||
412 | skb_dst_set(skb, dst); | |
afe80a49 DA |
413 | |
414 | /* set pkt_type to avoid skb hitting packet taps twice - | |
415 | * once on Tx and again in Rx processing | |
416 | */ | |
417 | skb->pkt_type = PACKET_LOOPBACK; | |
418 | ||
419 | skb->protocol = eth_type_trans(skb, dev); | |
420 | ||
baebdf48 | 421 | if (likely(__netif_rx(skb) == NET_RX_SUCCESS)) |
afe80a49 DA |
422 | vrf_rx_stats(dev, len); |
423 | else | |
424 | this_cpu_inc(dev->dstats->rx_drps); | |
425 | ||
426 | return NETDEV_TX_OK; | |
427 | } | |
428 | ||
8c9c296a FW |
429 | static void vrf_nf_set_untracked(struct sk_buff *skb) |
430 | { | |
431 | if (skb_get_nfct(skb) == 0) | |
432 | nf_ct_set(skb, NULL, IP_CT_UNTRACKED); | |
433 | } | |
434 | ||
435 | static void vrf_nf_reset_ct(struct sk_buff *skb) | |
436 | { | |
437 | if (skb_get_nfct(skb) == IP_CT_UNTRACKED) | |
438 | nf_reset_ct(skb); | |
439 | } | |
440 | ||
35402e31 | 441 | #if IS_ENABLED(CONFIG_IPV6) |
4c1feac5 DA |
442 | static int vrf_ip6_local_out(struct net *net, struct sock *sk, |
443 | struct sk_buff *skb) | |
444 | { | |
445 | int err; | |
446 | ||
8c9c296a FW |
447 | vrf_nf_reset_ct(skb); |
448 | ||
4c1feac5 DA |
449 | err = nf_hook(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, |
450 | sk, skb, NULL, skb_dst(skb)->dev, dst_output); | |
451 | ||
452 | if (likely(err == 1)) | |
453 | err = dst_output(net, sk, skb); | |
454 | ||
455 | return err; | |
456 | } | |
457 | ||
35402e31 DA |
458 | static netdev_tx_t vrf_process_v6_outbound(struct sk_buff *skb, |
459 | struct net_device *dev) | |
460 | { | |
107e47cc | 461 | const struct ipv6hdr *iph; |
35402e31 | 462 | struct net *net = dev_net(skb->dev); |
107e47cc | 463 | struct flowi6 fl6; |
35402e31 DA |
464 | int ret = NET_XMIT_DROP; |
465 | struct dst_entry *dst; | |
466 | struct dst_entry *dst_null = &net->ipv6.ip6_null_entry->dst; | |
467 | ||
107e47cc PK |
468 | if (!pskb_may_pull(skb, ETH_HLEN + sizeof(struct ipv6hdr))) |
469 | goto err; | |
470 | ||
471 | iph = ipv6_hdr(skb); | |
472 | ||
473 | memset(&fl6, 0, sizeof(fl6)); | |
474 | /* needed to match OIF rule */ | |
40867d74 | 475 | fl6.flowi6_l3mdev = dev->ifindex; |
107e47cc PK |
476 | fl6.flowi6_iif = LOOPBACK_IFINDEX; |
477 | fl6.daddr = iph->daddr; | |
478 | fl6.saddr = iph->saddr; | |
479 | fl6.flowlabel = ip6_flowinfo(iph); | |
480 | fl6.flowi6_mark = skb->mark; | |
481 | fl6.flowi6_proto = iph->nexthdr; | |
107e47cc | 482 | |
a53c1028 DA |
483 | dst = ip6_dst_lookup_flow(net, NULL, &fl6, NULL); |
484 | if (IS_ERR(dst) || dst == dst_null) | |
35402e31 DA |
485 | goto err; |
486 | ||
487 | skb_dst_drop(skb); | |
b4869aa2 | 488 | |
2e1534f3 ND |
489 | /* if dst.dev is the VRF device again this is locally originated traffic |
490 | * destined to a local address. Short circuit to Rx path. | |
b4869aa2 | 491 | */ |
4f04256c DA |
492 | if (dst->dev == dev) |
493 | return vrf_local_xmit(skb, dev, dst); | |
b4869aa2 | 494 | |
35402e31 DA |
495 | skb_dst_set(skb, dst); |
496 | ||
911a66fb DA |
497 | /* strip the ethernet header added for pass through VRF device */ |
498 | __skb_pull(skb, skb_network_offset(skb)); | |
499 | ||
ee201011 | 500 | memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); |
4c1feac5 | 501 | ret = vrf_ip6_local_out(net, skb->sk, skb); |
35402e31 DA |
502 | if (unlikely(net_xmit_eval(ret))) |
503 | dev->stats.tx_errors++; | |
504 | else | |
505 | ret = NET_XMIT_SUCCESS; | |
506 | ||
507 | return ret; | |
508 | err: | |
509 | vrf_tx_error(dev, skb); | |
510 | return NET_XMIT_DROP; | |
511 | } | |
512 | #else | |
193125db DA |
513 | static netdev_tx_t vrf_process_v6_outbound(struct sk_buff *skb, |
514 | struct net_device *dev) | |
515 | { | |
57b8efa1 NA |
516 | vrf_tx_error(dev, skb); |
517 | return NET_XMIT_DROP; | |
193125db | 518 | } |
35402e31 | 519 | #endif |
193125db | 520 | |
ebfc102c DA |
521 | /* based on ip_local_out; can't use it b/c the dst is switched pointing to us */ |
522 | static int vrf_ip_local_out(struct net *net, struct sock *sk, | |
523 | struct sk_buff *skb) | |
524 | { | |
525 | int err; | |
526 | ||
8c9c296a FW |
527 | vrf_nf_reset_ct(skb); |
528 | ||
ebfc102c DA |
529 | err = nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT, net, sk, |
530 | skb, NULL, skb_dst(skb)->dev, dst_output); | |
531 | if (likely(err == 1)) | |
532 | err = dst_output(net, sk, skb); | |
533 | ||
534 | return err; | |
535 | } | |
536 | ||
193125db DA |
537 | static netdev_tx_t vrf_process_v4_outbound(struct sk_buff *skb, |
538 | struct net_device *vrf_dev) | |
539 | { | |
107e47cc | 540 | struct iphdr *ip4h; |
193125db | 541 | int ret = NET_XMIT_DROP; |
107e47cc | 542 | struct flowi4 fl4; |
911a66fb DA |
543 | struct net *net = dev_net(vrf_dev); |
544 | struct rtable *rt; | |
545 | ||
107e47cc PK |
546 | if (!pskb_may_pull(skb, ETH_HLEN + sizeof(struct iphdr))) |
547 | goto err; | |
548 | ||
549 | ip4h = ip_hdr(skb); | |
550 | ||
551 | memset(&fl4, 0, sizeof(fl4)); | |
552 | /* needed to match OIF rule */ | |
40867d74 | 553 | fl4.flowi4_l3mdev = vrf_dev->ifindex; |
107e47cc PK |
554 | fl4.flowi4_iif = LOOPBACK_IFINDEX; |
555 | fl4.flowi4_tos = RT_TOS(ip4h->tos); | |
40867d74 | 556 | fl4.flowi4_flags = FLOWI_FLAG_ANYSRC; |
107e47cc PK |
557 | fl4.flowi4_proto = ip4h->protocol; |
558 | fl4.daddr = ip4h->daddr; | |
559 | fl4.saddr = ip4h->saddr; | |
560 | ||
911a66fb DA |
561 | rt = ip_route_output_flow(net, &fl4, NULL); |
562 | if (IS_ERR(rt)) | |
563 | goto err; | |
193125db | 564 | |
911a66fb | 565 | skb_dst_drop(skb); |
afe80a49 | 566 | |
2e1534f3 ND |
567 | /* if dst.dev is the VRF device again this is locally originated traffic |
568 | * destined to a local address. Short circuit to Rx path. | |
afe80a49 | 569 | */ |
4f04256c DA |
570 | if (rt->dst.dev == vrf_dev) |
571 | return vrf_local_xmit(skb, vrf_dev, &rt->dst); | |
afe80a49 | 572 | |
911a66fb DA |
573 | skb_dst_set(skb, &rt->dst); |
574 | ||
575 | /* strip the ethernet header added for pass through VRF device */ | |
576 | __skb_pull(skb, skb_network_offset(skb)); | |
193125db DA |
577 | |
578 | if (!ip4h->saddr) { | |
579 | ip4h->saddr = inet_select_addr(skb_dst(skb)->dev, 0, | |
580 | RT_SCOPE_LINK); | |
581 | } | |
582 | ||
ee201011 | 583 | memset(IPCB(skb), 0, sizeof(*IPCB(skb))); |
ebfc102c | 584 | ret = vrf_ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); |
193125db DA |
585 | if (unlikely(net_xmit_eval(ret))) |
586 | vrf_dev->stats.tx_errors++; | |
587 | else | |
588 | ret = NET_XMIT_SUCCESS; | |
589 | ||
590 | out: | |
591 | return ret; | |
592 | err: | |
57b8efa1 | 593 | vrf_tx_error(vrf_dev, skb); |
193125db DA |
594 | goto out; |
595 | } | |
596 | ||
597 | static netdev_tx_t is_ip_tx_frame(struct sk_buff *skb, struct net_device *dev) | |
598 | { | |
599 | switch (skb->protocol) { | |
600 | case htons(ETH_P_IP): | |
601 | return vrf_process_v4_outbound(skb, dev); | |
602 | case htons(ETH_P_IPV6): | |
603 | return vrf_process_v6_outbound(skb, dev); | |
604 | default: | |
57b8efa1 | 605 | vrf_tx_error(dev, skb); |
193125db DA |
606 | return NET_XMIT_DROP; |
607 | } | |
608 | } | |
609 | ||
610 | static netdev_tx_t vrf_xmit(struct sk_buff *skb, struct net_device *dev) | |
611 | { | |
f7887d40 | 612 | int len = skb->len; |
193125db DA |
613 | netdev_tx_t ret = is_ip_tx_frame(skb, dev); |
614 | ||
615 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
616 | struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats); | |
617 | ||
618 | u64_stats_update_begin(&dstats->syncp); | |
619 | dstats->tx_pkts++; | |
f7887d40 | 620 | dstats->tx_bytes += len; |
193125db DA |
621 | u64_stats_update_end(&dstats->syncp); |
622 | } else { | |
623 | this_cpu_inc(dev->dstats->tx_drps); | |
624 | } | |
625 | ||
626 | return ret; | |
627 | } | |
628 | ||
9e2b7fa2 | 629 | static void vrf_finish_direct(struct sk_buff *skb) |
dcdd43c4 DA |
630 | { |
631 | struct net_device *vrf_dev = skb->dev; | |
632 | ||
633 | if (!list_empty(&vrf_dev->ptype_all) && | |
634 | likely(skb_headroom(skb) >= ETH_HLEN)) { | |
d58ff351 | 635 | struct ethhdr *eth = skb_push(skb, ETH_HLEN); |
dcdd43c4 DA |
636 | |
637 | ether_addr_copy(eth->h_source, vrf_dev->dev_addr); | |
638 | eth_zero_addr(eth->h_dest); | |
639 | eth->h_proto = skb->protocol; | |
640 | ||
dcdd43c4 | 641 | dev_queue_xmit_nit(skb, vrf_dev); |
dcdd43c4 DA |
642 | |
643 | skb_pull(skb, ETH_HLEN); | |
644 | } | |
645 | ||
8c9c296a | 646 | vrf_nf_reset_ct(skb); |
dcdd43c4 DA |
647 | } |
648 | ||
35402e31 | 649 | #if IS_ENABLED(CONFIG_IPV6) |
35402e31 DA |
650 | /* modelled after ip6_finish_output2 */ |
651 | static int vrf_finish_output6(struct net *net, struct sock *sk, | |
652 | struct sk_buff *skb) | |
653 | { | |
654 | struct dst_entry *dst = skb_dst(skb); | |
655 | struct net_device *dev = dst->dev; | |
9b1c1ef1 | 656 | const struct in6_addr *nexthop; |
35402e31 | 657 | struct neighbour *neigh; |
35402e31 DA |
658 | int ret; |
659 | ||
8c9c296a | 660 | vrf_nf_reset_ct(skb); |
eb63ecc1 | 661 | |
35402e31 DA |
662 | skb->protocol = htons(ETH_P_IPV6); |
663 | skb->dev = dev; | |
664 | ||
2033ab90 | 665 | rcu_read_lock(); |
35402e31 DA |
666 | nexthop = rt6_nexthop((struct rt6_info *)dst, &ipv6_hdr(skb)->daddr); |
667 | neigh = __ipv6_neigh_lookup_noref(dst->dev, nexthop); | |
668 | if (unlikely(!neigh)) | |
669 | neigh = __neigh_create(&nd_tbl, nexthop, dst->dev, false); | |
670 | if (!IS_ERR(neigh)) { | |
4ff06203 | 671 | sock_confirm_neigh(skb, neigh); |
0353f282 | 672 | ret = neigh_output(neigh, skb, false); |
2033ab90 | 673 | rcu_read_unlock(); |
35402e31 DA |
674 | return ret; |
675 | } | |
2033ab90 | 676 | rcu_read_unlock(); |
35402e31 DA |
677 | |
678 | IP6_INC_STATS(dev_net(dst->dev), | |
679 | ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES); | |
680 | kfree_skb(skb); | |
681 | return -EINVAL; | |
682 | } | |
683 | ||
684 | /* modelled after ip6_output */ | |
685 | static int vrf_output6(struct net *net, struct sock *sk, struct sk_buff *skb) | |
686 | { | |
687 | return NF_HOOK_COND(NFPROTO_IPV6, NF_INET_POST_ROUTING, | |
688 | net, sk, skb, NULL, skb_dst(skb)->dev, | |
689 | vrf_finish_output6, | |
690 | !(IP6CB(skb)->flags & IP6SKB_REROUTED)); | |
691 | } | |
692 | ||
4c1feac5 DA |
693 | /* set dst on skb to send packet to us via dev_xmit path. Allows |
694 | * packet to go through device based features such as qdisc, netfilter | |
695 | * hooks and packet sockets with skb->dev set to vrf device. | |
696 | */ | |
a9ec54d1 DA |
697 | static struct sk_buff *vrf_ip6_out_redirect(struct net_device *vrf_dev, |
698 | struct sk_buff *skb) | |
4c1feac5 DA |
699 | { |
700 | struct net_vrf *vrf = netdev_priv(vrf_dev); | |
701 | struct dst_entry *dst = NULL; | |
702 | struct rt6_info *rt6; | |
703 | ||
4c1feac5 DA |
704 | rcu_read_lock(); |
705 | ||
706 | rt6 = rcu_dereference(vrf->rt6); | |
707 | if (likely(rt6)) { | |
708 | dst = &rt6->dst; | |
709 | dst_hold(dst); | |
710 | } | |
711 | ||
712 | rcu_read_unlock(); | |
713 | ||
714 | if (unlikely(!dst)) { | |
715 | vrf_tx_error(vrf_dev, skb); | |
716 | return NULL; | |
717 | } | |
718 | ||
719 | skb_dst_drop(skb); | |
720 | skb_dst_set(skb, dst); | |
721 | ||
722 | return skb; | |
723 | } | |
724 | ||
9e2b7fa2 MW |
725 | static int vrf_output6_direct_finish(struct net *net, struct sock *sk, |
726 | struct sk_buff *skb) | |
727 | { | |
728 | vrf_finish_direct(skb); | |
729 | ||
730 | return vrf_ip6_local_out(net, sk, skb); | |
731 | } | |
732 | ||
a9ec54d1 DA |
733 | static int vrf_output6_direct(struct net *net, struct sock *sk, |
734 | struct sk_buff *skb) | |
735 | { | |
9e2b7fa2 MW |
736 | int err = 1; |
737 | ||
a9ec54d1 DA |
738 | skb->protocol = htons(ETH_P_IPV6); |
739 | ||
9e2b7fa2 MW |
740 | if (!(IPCB(skb)->flags & IPSKB_REROUTED)) |
741 | err = nf_hook(NFPROTO_IPV6, NF_INET_POST_ROUTING, net, sk, skb, | |
742 | NULL, skb->dev, vrf_output6_direct_finish); | |
743 | ||
744 | if (likely(err == 1)) | |
745 | vrf_finish_direct(skb); | |
746 | ||
747 | return err; | |
748 | } | |
749 | ||
750 | static int vrf_ip6_out_direct_finish(struct net *net, struct sock *sk, | |
751 | struct sk_buff *skb) | |
752 | { | |
753 | int err; | |
754 | ||
755 | err = vrf_output6_direct(net, sk, skb); | |
756 | if (likely(err == 1)) | |
757 | err = vrf_ip6_local_out(net, sk, skb); | |
758 | ||
759 | return err; | |
a9ec54d1 DA |
760 | } |
761 | ||
762 | static struct sk_buff *vrf_ip6_out_direct(struct net_device *vrf_dev, | |
763 | struct sock *sk, | |
764 | struct sk_buff *skb) | |
765 | { | |
766 | struct net *net = dev_net(vrf_dev); | |
767 | int err; | |
768 | ||
769 | skb->dev = vrf_dev; | |
770 | ||
771 | err = nf_hook(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, | |
9e2b7fa2 | 772 | skb, NULL, vrf_dev, vrf_ip6_out_direct_finish); |
a9ec54d1 DA |
773 | |
774 | if (likely(err == 1)) | |
775 | err = vrf_output6_direct(net, sk, skb); | |
776 | ||
a9ec54d1 | 777 | if (likely(err == 1)) |
9e2b7fa2 | 778 | return skb; |
a9ec54d1 | 779 | |
9e2b7fa2 | 780 | return NULL; |
a9ec54d1 DA |
781 | } |
782 | ||
783 | static struct sk_buff *vrf_ip6_out(struct net_device *vrf_dev, | |
784 | struct sock *sk, | |
785 | struct sk_buff *skb) | |
786 | { | |
787 | /* don't divert link scope packets */ | |
788 | if (rt6_need_strict(&ipv6_hdr(skb)->daddr)) | |
789 | return skb; | |
790 | ||
d43b75fb ND |
791 | vrf_nf_set_untracked(skb); |
792 | ||
16b9db1c DA |
793 | if (qdisc_tx_is_default(vrf_dev) || |
794 | IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) | |
a9ec54d1 DA |
795 | return vrf_ip6_out_direct(vrf_dev, sk, skb); |
796 | ||
797 | return vrf_ip6_out_redirect(vrf_dev, skb); | |
798 | } | |
799 | ||
b0e95ccd | 800 | /* holding rtnl */ |
810e530b | 801 | static void vrf_rt6_release(struct net_device *dev, struct net_vrf *vrf) |
35402e31 | 802 | { |
b0e95ccd | 803 | struct rt6_info *rt6 = rtnl_dereference(vrf->rt6); |
810e530b DA |
804 | struct net *net = dev_net(dev); |
805 | struct dst_entry *dst; | |
b0e95ccd | 806 | |
b4869aa2 | 807 | RCU_INIT_POINTER(vrf->rt6, NULL); |
b4869aa2 | 808 | synchronize_rcu(); |
b0e95ccd | 809 | |
810e530b DA |
810 | /* move dev in dst's to loopback so this VRF device can be deleted |
811 | * - based on dst_ifdown | |
812 | */ | |
813 | if (rt6) { | |
814 | dst = &rt6->dst; | |
d62607c3 JK |
815 | netdev_ref_replace(dst->dev, net->loopback_dev, |
816 | &dst->dev_tracker, GFP_KERNEL); | |
810e530b | 817 | dst->dev = net->loopback_dev; |
810e530b DA |
818 | dst_release(dst); |
819 | } | |
35402e31 DA |
820 | } |
821 | ||
822 | static int vrf_rt6_create(struct net_device *dev) | |
823 | { | |
af13b3c3 | 824 | int flags = DST_NOPOLICY | DST_NOXFRM; |
35402e31 | 825 | struct net_vrf *vrf = netdev_priv(dev); |
9ab179d8 | 826 | struct net *net = dev_net(dev); |
4f04256c | 827 | struct rt6_info *rt6; |
35402e31 DA |
828 | int rc = -ENOMEM; |
829 | ||
e4348637 DA |
830 | /* IPv6 can be CONFIG enabled and then disabled runtime */ |
831 | if (!ipv6_mod_enabled()) | |
832 | return 0; | |
833 | ||
43b059a3 DA |
834 | vrf->fib6_table = fib6_new_table(net, vrf->tb_id); |
835 | if (!vrf->fib6_table) | |
b3b4663c DA |
836 | goto out; |
837 | ||
b4869aa2 DA |
838 | /* create a dst for routing packets out a VRF device */ |
839 | rt6 = ip6_dst_alloc(net, dev, flags); | |
35402e31 DA |
840 | if (!rt6) |
841 | goto out; | |
842 | ||
b3b4663c | 843 | rt6->dst.output = vrf_output6; |
b4869aa2 | 844 | |
b0e95ccd DA |
845 | rcu_assign_pointer(vrf->rt6, rt6); |
846 | ||
35402e31 DA |
847 | rc = 0; |
848 | out: | |
849 | return rc; | |
850 | } | |
851 | #else | |
4c1feac5 DA |
852 | static struct sk_buff *vrf_ip6_out(struct net_device *vrf_dev, |
853 | struct sock *sk, | |
854 | struct sk_buff *skb) | |
855 | { | |
856 | return skb; | |
857 | } | |
858 | ||
810e530b | 859 | static void vrf_rt6_release(struct net_device *dev, struct net_vrf *vrf) |
35402e31 DA |
860 | { |
861 | } | |
862 | ||
863 | static int vrf_rt6_create(struct net_device *dev) | |
864 | { | |
865 | return 0; | |
866 | } | |
867 | #endif | |
868 | ||
8f58336d | 869 | /* modelled after ip_finish_output2 */ |
0c4b51f0 | 870 | static int vrf_finish_output(struct net *net, struct sock *sk, struct sk_buff *skb) |
193125db | 871 | { |
8f58336d DA |
872 | struct dst_entry *dst = skb_dst(skb); |
873 | struct rtable *rt = (struct rtable *)dst; | |
874 | struct net_device *dev = dst->dev; | |
875 | unsigned int hh_len = LL_RESERVED_SPACE(dev); | |
876 | struct neighbour *neigh; | |
5c9f7c1d | 877 | bool is_v6gw = false; |
8f58336d | 878 | |
8c9c296a | 879 | vrf_nf_reset_ct(skb); |
eb63ecc1 | 880 | |
8f58336d DA |
881 | /* Be paranoid, rather than too clever. */ |
882 | if (unlikely(skb_headroom(skb) < hh_len && dev->header_ops)) { | |
14ee70ca VA |
883 | skb = skb_expand_head(skb, hh_len); |
884 | if (!skb) { | |
06669e68 | 885 | dev->stats.tx_errors++; |
14ee70ca | 886 | return -ENOMEM; |
8f58336d | 887 | } |
8f58336d DA |
888 | } |
889 | ||
2033ab90 | 890 | rcu_read_lock(); |
8f58336d | 891 | |
5c9f7c1d | 892 | neigh = ip_neigh_for_gw(rt, skb, &is_v6gw); |
4ff06203 | 893 | if (!IS_ERR(neigh)) { |
14ee70ca VA |
894 | int ret; |
895 | ||
4ff06203 | 896 | sock_confirm_neigh(skb, neigh); |
5c9f7c1d DA |
897 | /* if crossing protocols, can not use the cached header */ |
898 | ret = neigh_output(neigh, skb, is_v6gw); | |
2033ab90 | 899 | rcu_read_unlock(); |
82dd0d2a | 900 | return ret; |
4ff06203 | 901 | } |
8f58336d | 902 | |
2033ab90 | 903 | rcu_read_unlock(); |
82dd0d2a | 904 | vrf_tx_error(skb->dev, skb); |
14ee70ca | 905 | return -EINVAL; |
193125db DA |
906 | } |
907 | ||
ede2059d | 908 | static int vrf_output(struct net *net, struct sock *sk, struct sk_buff *skb) |
193125db DA |
909 | { |
910 | struct net_device *dev = skb_dst(skb)->dev; | |
911 | ||
29a26a56 | 912 | IP_UPD_PO_STATS(net, IPSTATS_MIB_OUT, skb->len); |
193125db DA |
913 | |
914 | skb->dev = dev; | |
915 | skb->protocol = htons(ETH_P_IP); | |
916 | ||
29a26a56 EB |
917 | return NF_HOOK_COND(NFPROTO_IPV4, NF_INET_POST_ROUTING, |
918 | net, sk, skb, NULL, dev, | |
8f58336d | 919 | vrf_finish_output, |
193125db DA |
920 | !(IPCB(skb)->flags & IPSKB_REROUTED)); |
921 | } | |
922 | ||
ebfc102c DA |
923 | /* set dst on skb to send packet to us via dev_xmit path. Allows |
924 | * packet to go through device based features such as qdisc, netfilter | |
925 | * hooks and packet sockets with skb->dev set to vrf device. | |
926 | */ | |
dcdd43c4 DA |
927 | static struct sk_buff *vrf_ip_out_redirect(struct net_device *vrf_dev, |
928 | struct sk_buff *skb) | |
ebfc102c DA |
929 | { |
930 | struct net_vrf *vrf = netdev_priv(vrf_dev); | |
931 | struct dst_entry *dst = NULL; | |
932 | struct rtable *rth; | |
933 | ||
934 | rcu_read_lock(); | |
935 | ||
936 | rth = rcu_dereference(vrf->rth); | |
937 | if (likely(rth)) { | |
938 | dst = &rth->dst; | |
939 | dst_hold(dst); | |
940 | } | |
941 | ||
942 | rcu_read_unlock(); | |
943 | ||
944 | if (unlikely(!dst)) { | |
945 | vrf_tx_error(vrf_dev, skb); | |
946 | return NULL; | |
947 | } | |
948 | ||
949 | skb_dst_drop(skb); | |
950 | skb_dst_set(skb, dst); | |
951 | ||
952 | return skb; | |
953 | } | |
954 | ||
9e2b7fa2 MW |
955 | static int vrf_output_direct_finish(struct net *net, struct sock *sk, |
956 | struct sk_buff *skb) | |
957 | { | |
958 | vrf_finish_direct(skb); | |
959 | ||
960 | return vrf_ip_local_out(net, sk, skb); | |
961 | } | |
962 | ||
dcdd43c4 DA |
963 | static int vrf_output_direct(struct net *net, struct sock *sk, |
964 | struct sk_buff *skb) | |
965 | { | |
9e2b7fa2 MW |
966 | int err = 1; |
967 | ||
dcdd43c4 DA |
968 | skb->protocol = htons(ETH_P_IP); |
969 | ||
9e2b7fa2 MW |
970 | if (!(IPCB(skb)->flags & IPSKB_REROUTED)) |
971 | err = nf_hook(NFPROTO_IPV4, NF_INET_POST_ROUTING, net, sk, skb, | |
972 | NULL, skb->dev, vrf_output_direct_finish); | |
973 | ||
974 | if (likely(err == 1)) | |
975 | vrf_finish_direct(skb); | |
976 | ||
977 | return err; | |
978 | } | |
979 | ||
980 | static int vrf_ip_out_direct_finish(struct net *net, struct sock *sk, | |
981 | struct sk_buff *skb) | |
982 | { | |
983 | int err; | |
984 | ||
985 | err = vrf_output_direct(net, sk, skb); | |
986 | if (likely(err == 1)) | |
987 | err = vrf_ip_local_out(net, sk, skb); | |
988 | ||
989 | return err; | |
dcdd43c4 DA |
990 | } |
991 | ||
992 | static struct sk_buff *vrf_ip_out_direct(struct net_device *vrf_dev, | |
993 | struct sock *sk, | |
994 | struct sk_buff *skb) | |
995 | { | |
996 | struct net *net = dev_net(vrf_dev); | |
997 | int err; | |
998 | ||
999 | skb->dev = vrf_dev; | |
1000 | ||
1001 | err = nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT, net, sk, | |
9e2b7fa2 | 1002 | skb, NULL, vrf_dev, vrf_ip_out_direct_finish); |
dcdd43c4 DA |
1003 | |
1004 | if (likely(err == 1)) | |
1005 | err = vrf_output_direct(net, sk, skb); | |
1006 | ||
dcdd43c4 | 1007 | if (likely(err == 1)) |
9e2b7fa2 | 1008 | return skb; |
dcdd43c4 | 1009 | |
9e2b7fa2 | 1010 | return NULL; |
dcdd43c4 DA |
1011 | } |
1012 | ||
1013 | static struct sk_buff *vrf_ip_out(struct net_device *vrf_dev, | |
1014 | struct sock *sk, | |
1015 | struct sk_buff *skb) | |
1016 | { | |
1e19c4d6 DA |
1017 | /* don't divert multicast or local broadcast */ |
1018 | if (ipv4_is_multicast(ip_hdr(skb)->daddr) || | |
1019 | ipv4_is_lbcast(ip_hdr(skb)->daddr)) | |
dcdd43c4 DA |
1020 | return skb; |
1021 | ||
d43b75fb ND |
1022 | vrf_nf_set_untracked(skb); |
1023 | ||
16b9db1c DA |
1024 | if (qdisc_tx_is_default(vrf_dev) || |
1025 | IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) | |
dcdd43c4 DA |
1026 | return vrf_ip_out_direct(vrf_dev, sk, skb); |
1027 | ||
1028 | return vrf_ip_out_redirect(vrf_dev, skb); | |
1029 | } | |
1030 | ||
ebfc102c DA |
1031 | /* called with rcu lock held */ |
1032 | static struct sk_buff *vrf_l3_out(struct net_device *vrf_dev, | |
1033 | struct sock *sk, | |
1034 | struct sk_buff *skb, | |
1035 | u16 proto) | |
1036 | { | |
1037 | switch (proto) { | |
1038 | case AF_INET: | |
1039 | return vrf_ip_out(vrf_dev, sk, skb); | |
4c1feac5 DA |
1040 | case AF_INET6: |
1041 | return vrf_ip6_out(vrf_dev, sk, skb); | |
ebfc102c DA |
1042 | } |
1043 | ||
1044 | return skb; | |
1045 | } | |
1046 | ||
b0e95ccd | 1047 | /* holding rtnl */ |
810e530b | 1048 | static void vrf_rtable_release(struct net_device *dev, struct net_vrf *vrf) |
193125db | 1049 | { |
b0e95ccd | 1050 | struct rtable *rth = rtnl_dereference(vrf->rth); |
810e530b DA |
1051 | struct net *net = dev_net(dev); |
1052 | struct dst_entry *dst; | |
b0e95ccd | 1053 | |
afe80a49 | 1054 | RCU_INIT_POINTER(vrf->rth, NULL); |
afe80a49 | 1055 | synchronize_rcu(); |
193125db | 1056 | |
810e530b DA |
1057 | /* move dev in dst's to loopback so this VRF device can be deleted |
1058 | * - based on dst_ifdown | |
1059 | */ | |
1060 | if (rth) { | |
1061 | dst = &rth->dst; | |
d62607c3 JK |
1062 | netdev_ref_replace(dst->dev, net->loopback_dev, |
1063 | &dst->dev_tracker, GFP_KERNEL); | |
810e530b | 1064 | dst->dev = net->loopback_dev; |
810e530b DA |
1065 | dst_release(dst); |
1066 | } | |
193125db DA |
1067 | } |
1068 | ||
b0e95ccd | 1069 | static int vrf_rtable_create(struct net_device *dev) |
193125db | 1070 | { |
b7503e0c | 1071 | struct net_vrf *vrf = netdev_priv(dev); |
4f04256c | 1072 | struct rtable *rth; |
193125db | 1073 | |
b3b4663c | 1074 | if (!fib_new_table(dev_net(dev), vrf->tb_id)) |
b0e95ccd | 1075 | return -ENOMEM; |
b3b4663c | 1076 | |
afe80a49 | 1077 | /* create a dst for routing packets out through a VRF device */ |
b5c8b3fe | 1078 | rth = rt_dst_alloc(dev, 0, RTN_UNICAST, 1); |
b0e95ccd DA |
1079 | if (!rth) |
1080 | return -ENOMEM; | |
193125db | 1081 | |
b0e95ccd | 1082 | rth->dst.output = vrf_output; |
b0e95ccd DA |
1083 | |
1084 | rcu_assign_pointer(vrf->rth, rth); | |
1085 | ||
1086 | return 0; | |
193125db DA |
1087 | } |
1088 | ||
1089 | /**************************** device handling ********************/ | |
1090 | ||
1091 | /* cycle interface to flush neighbor cache and move routes across tables */ | |
dc1aea1e PM |
1092 | static void cycle_netdev(struct net_device *dev, |
1093 | struct netlink_ext_ack *extack) | |
193125db DA |
1094 | { |
1095 | unsigned int flags = dev->flags; | |
1096 | int ret; | |
1097 | ||
1098 | if (!netif_running(dev)) | |
1099 | return; | |
1100 | ||
567c5e13 | 1101 | ret = dev_change_flags(dev, flags & ~IFF_UP, extack); |
193125db | 1102 | if (ret >= 0) |
567c5e13 | 1103 | ret = dev_change_flags(dev, flags, extack); |
193125db DA |
1104 | |
1105 | if (ret < 0) { | |
1106 | netdev_err(dev, | |
1107 | "Failed to cycle device %s; route tables might be wrong!\n", | |
1108 | dev->name); | |
1109 | } | |
1110 | } | |
1111 | ||
42ab19ee DA |
1112 | static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev, |
1113 | struct netlink_ext_ack *extack) | |
193125db | 1114 | { |
bad53162 | 1115 | int ret; |
193125db | 1116 | |
26d31ac1 DA |
1117 | /* do not allow loopback device to be enslaved to a VRF. |
1118 | * The vrf device acts as the loopback for the vrf. | |
1119 | */ | |
de3baa3e DA |
1120 | if (port_dev == dev_net(dev)->loopback_dev) { |
1121 | NL_SET_ERR_MSG(extack, | |
1122 | "Can not enslave loopback device to a VRF"); | |
26d31ac1 | 1123 | return -EOPNOTSUPP; |
de3baa3e | 1124 | } |
26d31ac1 | 1125 | |
fdeea7be | 1126 | port_dev->priv_flags |= IFF_L3MDEV_SLAVE; |
42ab19ee | 1127 | ret = netdev_master_upper_dev_link(port_dev, dev, NULL, NULL, extack); |
193125db | 1128 | if (ret < 0) |
fdeea7be | 1129 | goto err; |
193125db | 1130 | |
dc1aea1e | 1131 | cycle_netdev(port_dev, extack); |
193125db DA |
1132 | |
1133 | return 0; | |
fdeea7be IS |
1134 | |
1135 | err: | |
1136 | port_dev->priv_flags &= ~IFF_L3MDEV_SLAVE; | |
1137 | return ret; | |
193125db DA |
1138 | } |
1139 | ||
33eaf2a6 DA |
1140 | static int vrf_add_slave(struct net_device *dev, struct net_device *port_dev, |
1141 | struct netlink_ext_ack *extack) | |
193125db | 1142 | { |
de3baa3e DA |
1143 | if (netif_is_l3_master(port_dev)) { |
1144 | NL_SET_ERR_MSG(extack, | |
1145 | "Can not enslave an L3 master device to a VRF"); | |
1146 | return -EINVAL; | |
1147 | } | |
1148 | ||
1149 | if (netif_is_l3_slave(port_dev)) | |
193125db DA |
1150 | return -EINVAL; |
1151 | ||
42ab19ee | 1152 | return do_vrf_add_slave(dev, port_dev, extack); |
193125db DA |
1153 | } |
1154 | ||
1155 | /* inverse of do_vrf_add_slave */ | |
1156 | static int do_vrf_del_slave(struct net_device *dev, struct net_device *port_dev) | |
1157 | { | |
193125db | 1158 | netdev_upper_dev_unlink(port_dev, dev); |
fee6d4c7 | 1159 | port_dev->priv_flags &= ~IFF_L3MDEV_SLAVE; |
193125db | 1160 | |
dc1aea1e | 1161 | cycle_netdev(port_dev, NULL); |
193125db | 1162 | |
193125db DA |
1163 | return 0; |
1164 | } | |
1165 | ||
1166 | static int vrf_del_slave(struct net_device *dev, struct net_device *port_dev) | |
1167 | { | |
193125db DA |
1168 | return do_vrf_del_slave(dev, port_dev); |
1169 | } | |
1170 | ||
1171 | static void vrf_dev_uninit(struct net_device *dev) | |
1172 | { | |
1173 | struct net_vrf *vrf = netdev_priv(dev); | |
193125db | 1174 | |
810e530b DA |
1175 | vrf_rtable_release(dev, vrf); |
1176 | vrf_rt6_release(dev, vrf); | |
193125db | 1177 | |
3a4a27d3 | 1178 | free_percpu(dev->dstats); |
193125db DA |
1179 | dev->dstats = NULL; |
1180 | } | |
1181 | ||
1182 | static int vrf_dev_init(struct net_device *dev) | |
1183 | { | |
1184 | struct net_vrf *vrf = netdev_priv(dev); | |
1185 | ||
193125db DA |
1186 | dev->dstats = netdev_alloc_pcpu_stats(struct pcpu_dstats); |
1187 | if (!dev->dstats) | |
1188 | goto out_nomem; | |
1189 | ||
1190 | /* create the default dst which points back to us */ | |
b0e95ccd | 1191 | if (vrf_rtable_create(dev) != 0) |
193125db DA |
1192 | goto out_stats; |
1193 | ||
35402e31 DA |
1194 | if (vrf_rt6_create(dev) != 0) |
1195 | goto out_rth; | |
1196 | ||
193125db DA |
1197 | dev->flags = IFF_MASTER | IFF_NOARP; |
1198 | ||
b87ab6b8 DA |
1199 | /* similarly, oper state is irrelevant; set to up to avoid confusion */ |
1200 | dev->operstate = IF_OPER_UP; | |
1a33e10e | 1201 | netdev_lockdep_set_classes(dev); |
193125db DA |
1202 | return 0; |
1203 | ||
35402e31 | 1204 | out_rth: |
810e530b | 1205 | vrf_rtable_release(dev, vrf); |
193125db DA |
1206 | out_stats: |
1207 | free_percpu(dev->dstats); | |
1208 | dev->dstats = NULL; | |
1209 | out_nomem: | |
1210 | return -ENOMEM; | |
1211 | } | |
1212 | ||
1213 | static const struct net_device_ops vrf_netdev_ops = { | |
1214 | .ndo_init = vrf_dev_init, | |
1215 | .ndo_uninit = vrf_dev_uninit, | |
1216 | .ndo_start_xmit = vrf_xmit, | |
6819e3f6 | 1217 | .ndo_set_mac_address = eth_mac_addr, |
193125db DA |
1218 | .ndo_get_stats64 = vrf_get_stats64, |
1219 | .ndo_add_slave = vrf_add_slave, | |
1220 | .ndo_del_slave = vrf_del_slave, | |
1221 | }; | |
1222 | ||
ee15ee5d DA |
1223 | static u32 vrf_fib_table(const struct net_device *dev) |
1224 | { | |
1225 | struct net_vrf *vrf = netdev_priv(dev); | |
1226 | ||
1227 | return vrf->tb_id; | |
1228 | } | |
1229 | ||
73e20b76 DA |
1230 | static int vrf_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb) |
1231 | { | |
1a4a5bf5 | 1232 | kfree_skb(skb); |
73e20b76 DA |
1233 | return 0; |
1234 | } | |
1235 | ||
1236 | static struct sk_buff *vrf_rcv_nfhook(u8 pf, unsigned int hook, | |
1237 | struct sk_buff *skb, | |
1238 | struct net_device *dev) | |
1239 | { | |
1240 | struct net *net = dev_net(dev); | |
1241 | ||
1a4a5bf5 | 1242 | if (nf_hook(pf, hook, net, NULL, skb, dev, NULL, vrf_rcv_finish) != 1) |
73e20b76 DA |
1243 | skb = NULL; /* kfree_skb(skb) handled by nf code */ |
1244 | ||
1245 | return skb; | |
1246 | } | |
1247 | ||
9125abe7 AM |
1248 | static int vrf_prepare_mac_header(struct sk_buff *skb, |
1249 | struct net_device *vrf_dev, u16 proto) | |
1250 | { | |
1251 | struct ethhdr *eth; | |
1252 | int err; | |
1253 | ||
1254 | /* in general, we do not know if there is enough space in the head of | |
1255 | * the packet for hosting the mac header. | |
1256 | */ | |
1257 | err = skb_cow_head(skb, LL_RESERVED_SPACE(vrf_dev)); | |
1258 | if (unlikely(err)) | |
1259 | /* no space in the skb head */ | |
1260 | return -ENOBUFS; | |
1261 | ||
1262 | __skb_push(skb, ETH_HLEN); | |
1263 | eth = (struct ethhdr *)skb->data; | |
1264 | ||
1265 | skb_reset_mac_header(skb); | |
012d69fb | 1266 | skb_reset_mac_len(skb); |
9125abe7 AM |
1267 | |
1268 | /* we set the ethernet destination and the source addresses to the | |
1269 | * address of the VRF device. | |
1270 | */ | |
1271 | ether_addr_copy(eth->h_dest, vrf_dev->dev_addr); | |
1272 | ether_addr_copy(eth->h_source, vrf_dev->dev_addr); | |
1273 | eth->h_proto = htons(proto); | |
1274 | ||
1275 | /* the destination address of the Ethernet frame corresponds to the | |
1276 | * address set on the VRF interface; therefore, the packet is intended | |
1277 | * to be processed locally. | |
1278 | */ | |
1279 | skb->protocol = eth->h_proto; | |
1280 | skb->pkt_type = PACKET_HOST; | |
1281 | ||
1282 | skb_postpush_rcsum(skb, skb->data, ETH_HLEN); | |
1283 | ||
1284 | skb_pull_inline(skb, ETH_HLEN); | |
1285 | ||
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | /* prepare and add the mac header to the packet if it was not set previously. | |
1290 | * In this way, packet sniffers such as tcpdump can parse the packet correctly. | |
1291 | * If the mac header was already set, the original mac header is left | |
1292 | * untouched and the function returns immediately. | |
1293 | */ | |
1294 | static int vrf_add_mac_header_if_unset(struct sk_buff *skb, | |
1295 | struct net_device *vrf_dev, | |
012d69fb | 1296 | u16 proto, struct net_device *orig_dev) |
9125abe7 | 1297 | { |
012d69fb | 1298 | if (skb_mac_header_was_set(skb) && dev_has_header(orig_dev)) |
9125abe7 AM |
1299 | return 0; |
1300 | ||
1301 | return vrf_prepare_mac_header(skb, vrf_dev, proto); | |
1302 | } | |
1303 | ||
74b20582 DA |
1304 | #if IS_ENABLED(CONFIG_IPV6) |
1305 | /* neighbor handling is done with actual device; do not want | |
1306 | * to flip skb->dev for those ndisc packets. This really fails | |
1307 | * for multiple next protocols (e.g., NEXTHDR_HOP). But it is | |
1308 | * a start. | |
1309 | */ | |
1310 | static bool ipv6_ndisc_frame(const struct sk_buff *skb) | |
1311 | { | |
1312 | const struct ipv6hdr *iph = ipv6_hdr(skb); | |
1313 | bool rc = false; | |
1314 | ||
1315 | if (iph->nexthdr == NEXTHDR_ICMP) { | |
1316 | const struct icmp6hdr *icmph; | |
1317 | struct icmp6hdr _icmph; | |
1318 | ||
1319 | icmph = skb_header_pointer(skb, sizeof(*iph), | |
1320 | sizeof(_icmph), &_icmph); | |
1321 | if (!icmph) | |
1322 | goto out; | |
1323 | ||
1324 | switch (icmph->icmp6_type) { | |
1325 | case NDISC_ROUTER_SOLICITATION: | |
1326 | case NDISC_ROUTER_ADVERTISEMENT: | |
1327 | case NDISC_NEIGHBOUR_SOLICITATION: | |
1328 | case NDISC_NEIGHBOUR_ADVERTISEMENT: | |
1329 | case NDISC_REDIRECT: | |
1330 | rc = true; | |
1331 | break; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | out: | |
1336 | return rc; | |
1337 | } | |
1338 | ||
9ff74384 DA |
1339 | static struct rt6_info *vrf_ip6_route_lookup(struct net *net, |
1340 | const struct net_device *dev, | |
1341 | struct flowi6 *fl6, | |
1342 | int ifindex, | |
b75cc8f9 | 1343 | const struct sk_buff *skb, |
9ff74384 DA |
1344 | int flags) |
1345 | { | |
1346 | struct net_vrf *vrf = netdev_priv(dev); | |
9ff74384 | 1347 | |
43b059a3 | 1348 | return ip6_pol_route(net, vrf->fib6_table, ifindex, fl6, skb, flags); |
9ff74384 DA |
1349 | } |
1350 | ||
1351 | static void vrf_ip6_input_dst(struct sk_buff *skb, struct net_device *vrf_dev, | |
1352 | int ifindex) | |
1353 | { | |
1354 | const struct ipv6hdr *iph = ipv6_hdr(skb); | |
1355 | struct flowi6 fl6 = { | |
ecf09117 AB |
1356 | .flowi6_iif = ifindex, |
1357 | .flowi6_mark = skb->mark, | |
1358 | .flowi6_proto = iph->nexthdr, | |
9ff74384 DA |
1359 | .daddr = iph->daddr, |
1360 | .saddr = iph->saddr, | |
1361 | .flowlabel = ip6_flowinfo(iph), | |
9ff74384 DA |
1362 | }; |
1363 | struct net *net = dev_net(vrf_dev); | |
1364 | struct rt6_info *rt6; | |
1365 | ||
b75cc8f9 | 1366 | rt6 = vrf_ip6_route_lookup(net, vrf_dev, &fl6, ifindex, skb, |
9ff74384 DA |
1367 | RT6_LOOKUP_F_HAS_SADDR | RT6_LOOKUP_F_IFACE); |
1368 | if (unlikely(!rt6)) | |
1369 | return; | |
1370 | ||
1371 | if (unlikely(&rt6->dst == &net->ipv6.ip6_null_entry->dst)) | |
1372 | return; | |
1373 | ||
1374 | skb_dst_set(skb, &rt6->dst); | |
1375 | } | |
1376 | ||
74b20582 DA |
1377 | static struct sk_buff *vrf_ip6_rcv(struct net_device *vrf_dev, |
1378 | struct sk_buff *skb) | |
1379 | { | |
9ff74384 | 1380 | int orig_iif = skb->skb_iif; |
6f12fa77 MM |
1381 | bool need_strict = rt6_need_strict(&ipv6_hdr(skb)->daddr); |
1382 | bool is_ndisc = ipv6_ndisc_frame(skb); | |
9ff74384 | 1383 | |
6f12fa77 | 1384 | /* loopback, multicast & non-ND link-local traffic; do not push through |
205704c6 | 1385 | * packet taps again. Reset pkt_type for upper layers to process skb. |
f2575c8f AT |
1386 | * For non-loopback strict packets, determine the dst using the original |
1387 | * ifindex. | |
b4869aa2 | 1388 | */ |
603113c5 | 1389 | if (skb->pkt_type == PACKET_LOOPBACK || (need_strict && !is_ndisc)) { |
b4869aa2 DA |
1390 | skb->dev = vrf_dev; |
1391 | skb->skb_iif = vrf_dev->ifindex; | |
a04a480d | 1392 | IP6CB(skb)->flags |= IP6SKB_L3SLAVE; |
603113c5 | 1393 | |
6f12fa77 MM |
1394 | if (skb->pkt_type == PACKET_LOOPBACK) |
1395 | skb->pkt_type = PACKET_HOST; | |
f2575c8f | 1396 | else |
603113c5 AT |
1397 | vrf_ip6_input_dst(skb, vrf_dev, orig_iif); |
1398 | ||
b4869aa2 DA |
1399 | goto out; |
1400 | } | |
1401 | ||
6f12fa77 MM |
1402 | /* if packet is NDISC then keep the ingress interface */ |
1403 | if (!is_ndisc) { | |
012d69fb EB |
1404 | struct net_device *orig_dev = skb->dev; |
1405 | ||
926d93a3 | 1406 | vrf_rx_stats(vrf_dev, skb->len); |
74b20582 DA |
1407 | skb->dev = vrf_dev; |
1408 | skb->skb_iif = vrf_dev->ifindex; | |
1409 | ||
a9ec54d1 | 1410 | if (!list_empty(&vrf_dev->ptype_all)) { |
04893908 AM |
1411 | int err; |
1412 | ||
1413 | err = vrf_add_mac_header_if_unset(skb, vrf_dev, | |
012d69fb EB |
1414 | ETH_P_IPV6, |
1415 | orig_dev); | |
04893908 AM |
1416 | if (likely(!err)) { |
1417 | skb_push(skb, skb->mac_len); | |
1418 | dev_queue_xmit_nit(skb, vrf_dev); | |
1419 | skb_pull(skb, skb->mac_len); | |
1420 | } | |
a9ec54d1 | 1421 | } |
74b20582 DA |
1422 | |
1423 | IP6CB(skb)->flags |= IP6SKB_L3SLAVE; | |
1424 | } | |
1425 | ||
9ff74384 DA |
1426 | if (need_strict) |
1427 | vrf_ip6_input_dst(skb, vrf_dev, orig_iif); | |
1428 | ||
73e20b76 | 1429 | skb = vrf_rcv_nfhook(NFPROTO_IPV6, NF_INET_PRE_ROUTING, skb, vrf_dev); |
b4869aa2 | 1430 | out: |
74b20582 DA |
1431 | return skb; |
1432 | } | |
1433 | ||
1434 | #else | |
1435 | static struct sk_buff *vrf_ip6_rcv(struct net_device *vrf_dev, | |
1436 | struct sk_buff *skb) | |
1437 | { | |
1438 | return skb; | |
1439 | } | |
1440 | #endif | |
1441 | ||
1442 | static struct sk_buff *vrf_ip_rcv(struct net_device *vrf_dev, | |
1443 | struct sk_buff *skb) | |
1444 | { | |
012d69fb EB |
1445 | struct net_device *orig_dev = skb->dev; |
1446 | ||
74b20582 DA |
1447 | skb->dev = vrf_dev; |
1448 | skb->skb_iif = vrf_dev->ifindex; | |
a04a480d | 1449 | IPCB(skb)->flags |= IPSKB_L3SLAVE; |
74b20582 | 1450 | |
e58e4159 DA |
1451 | if (ipv4_is_multicast(ip_hdr(skb)->daddr)) |
1452 | goto out; | |
1453 | ||
afe80a49 DA |
1454 | /* loopback traffic; do not push through packet taps again. |
1455 | * Reset pkt_type for upper layers to process skb | |
1456 | */ | |
1457 | if (skb->pkt_type == PACKET_LOOPBACK) { | |
1458 | skb->pkt_type = PACKET_HOST; | |
1459 | goto out; | |
1460 | } | |
1461 | ||
926d93a3 DA |
1462 | vrf_rx_stats(vrf_dev, skb->len); |
1463 | ||
dcdd43c4 | 1464 | if (!list_empty(&vrf_dev->ptype_all)) { |
04893908 AM |
1465 | int err; |
1466 | ||
012d69fb EB |
1467 | err = vrf_add_mac_header_if_unset(skb, vrf_dev, ETH_P_IP, |
1468 | orig_dev); | |
04893908 AM |
1469 | if (likely(!err)) { |
1470 | skb_push(skb, skb->mac_len); | |
1471 | dev_queue_xmit_nit(skb, vrf_dev); | |
1472 | skb_pull(skb, skb->mac_len); | |
1473 | } | |
dcdd43c4 | 1474 | } |
74b20582 | 1475 | |
73e20b76 | 1476 | skb = vrf_rcv_nfhook(NFPROTO_IPV4, NF_INET_PRE_ROUTING, skb, vrf_dev); |
afe80a49 | 1477 | out: |
74b20582 DA |
1478 | return skb; |
1479 | } | |
1480 | ||
1481 | /* called with rcu lock held */ | |
1482 | static struct sk_buff *vrf_l3_rcv(struct net_device *vrf_dev, | |
1483 | struct sk_buff *skb, | |
1484 | u16 proto) | |
1485 | { | |
1486 | switch (proto) { | |
1487 | case AF_INET: | |
1488 | return vrf_ip_rcv(vrf_dev, skb); | |
1489 | case AF_INET6: | |
1490 | return vrf_ip6_rcv(vrf_dev, skb); | |
1491 | } | |
1492 | ||
1493 | return skb; | |
1494 | } | |
1495 | ||
35402e31 | 1496 | #if IS_ENABLED(CONFIG_IPV6) |
4c1feac5 DA |
1497 | /* send to link-local or multicast address via interface enslaved to |
1498 | * VRF device. Force lookup to VRF table without changing flow struct | |
7d9e5f42 WW |
1499 | * Note: Caller to this function must hold rcu_read_lock() and no refcnt |
1500 | * is taken on the dst by this function. | |
4c1feac5 DA |
1501 | */ |
1502 | static struct dst_entry *vrf_link_scope_lookup(const struct net_device *dev, | |
1503 | struct flowi6 *fl6) | |
35402e31 | 1504 | { |
9ff74384 | 1505 | struct net *net = dev_net(dev); |
7d9e5f42 | 1506 | int flags = RT6_LOOKUP_F_IFACE | RT6_LOOKUP_F_DST_NOREF; |
b0e95ccd | 1507 | struct dst_entry *dst = NULL; |
9ff74384 | 1508 | struct rt6_info *rt; |
35402e31 | 1509 | |
4c1feac5 DA |
1510 | /* VRF device does not have a link-local address and |
1511 | * sending packets to link-local or mcast addresses over | |
1512 | * a VRF device does not make sense | |
1513 | */ | |
1514 | if (fl6->flowi6_oif == dev->ifindex) { | |
1515 | dst = &net->ipv6.ip6_null_entry->dst; | |
4c1feac5 | 1516 | return dst; |
35402e31 DA |
1517 | } |
1518 | ||
4c1feac5 DA |
1519 | if (!ipv6_addr_any(&fl6->saddr)) |
1520 | flags |= RT6_LOOKUP_F_HAS_SADDR; | |
1521 | ||
b75cc8f9 | 1522 | rt = vrf_ip6_route_lookup(net, dev, fl6, fl6->flowi6_oif, NULL, flags); |
4c1feac5 DA |
1523 | if (rt) |
1524 | dst = &rt->dst; | |
9ff74384 | 1525 | |
b0e95ccd | 1526 | return dst; |
35402e31 DA |
1527 | } |
1528 | #endif | |
1529 | ||
ee15ee5d DA |
1530 | static const struct l3mdev_ops vrf_l3mdev_ops = { |
1531 | .l3mdev_fib_table = vrf_fib_table, | |
74b20582 | 1532 | .l3mdev_l3_rcv = vrf_l3_rcv, |
ebfc102c | 1533 | .l3mdev_l3_out = vrf_l3_out, |
35402e31 | 1534 | #if IS_ENABLED(CONFIG_IPV6) |
4c1feac5 | 1535 | .l3mdev_link_scope_lookup = vrf_link_scope_lookup, |
35402e31 | 1536 | #endif |
ee15ee5d DA |
1537 | }; |
1538 | ||
193125db DA |
1539 | static void vrf_get_drvinfo(struct net_device *dev, |
1540 | struct ethtool_drvinfo *info) | |
1541 | { | |
fb3ceec1 WS |
1542 | strscpy(info->driver, DRV_NAME, sizeof(info->driver)); |
1543 | strscpy(info->version, DRV_VERSION, sizeof(info->version)); | |
193125db DA |
1544 | } |
1545 | ||
1546 | static const struct ethtool_ops vrf_ethtool_ops = { | |
1547 | .get_drvinfo = vrf_get_drvinfo, | |
1548 | }; | |
1549 | ||
1aa6c4f6 DA |
1550 | static inline size_t vrf_fib_rule_nl_size(void) |
1551 | { | |
1552 | size_t sz; | |
1553 | ||
1554 | sz = NLMSG_ALIGN(sizeof(struct fib_rule_hdr)); | |
1555 | sz += nla_total_size(sizeof(u8)); /* FRA_L3MDEV */ | |
1556 | sz += nla_total_size(sizeof(u32)); /* FRA_PRIORITY */ | |
1b71af60 | 1557 | sz += nla_total_size(sizeof(u8)); /* FRA_PROTOCOL */ |
1aa6c4f6 DA |
1558 | |
1559 | return sz; | |
1560 | } | |
1561 | ||
1562 | static int vrf_fib_rule(const struct net_device *dev, __u8 family, bool add_it) | |
1563 | { | |
1564 | struct fib_rule_hdr *frh; | |
1565 | struct nlmsghdr *nlh; | |
1566 | struct sk_buff *skb; | |
1567 | int err; | |
1568 | ||
dac91170 DA |
1569 | if ((family == AF_INET6 || family == RTNL_FAMILY_IP6MR) && |
1570 | !ipv6_mod_enabled()) | |
e4348637 DA |
1571 | return 0; |
1572 | ||
1aa6c4f6 DA |
1573 | skb = nlmsg_new(vrf_fib_rule_nl_size(), GFP_KERNEL); |
1574 | if (!skb) | |
1575 | return -ENOMEM; | |
1576 | ||
1577 | nlh = nlmsg_put(skb, 0, 0, 0, sizeof(*frh), 0); | |
1578 | if (!nlh) | |
1579 | goto nla_put_failure; | |
1580 | ||
1581 | /* rule only needs to appear once */ | |
426c87ca | 1582 | nlh->nlmsg_flags |= NLM_F_EXCL; |
1aa6c4f6 DA |
1583 | |
1584 | frh = nlmsg_data(nlh); | |
1585 | memset(frh, 0, sizeof(*frh)); | |
1586 | frh->family = family; | |
1587 | frh->action = FR_ACT_TO_TBL; | |
1b71af60 DS |
1588 | |
1589 | if (nla_put_u8(skb, FRA_PROTOCOL, RTPROT_KERNEL)) | |
1590 | goto nla_put_failure; | |
1aa6c4f6 | 1591 | |
18129a24 | 1592 | if (nla_put_u8(skb, FRA_L3MDEV, 1)) |
1aa6c4f6 DA |
1593 | goto nla_put_failure; |
1594 | ||
1595 | if (nla_put_u32(skb, FRA_PRIORITY, FIB_RULE_PREF)) | |
1596 | goto nla_put_failure; | |
1597 | ||
1598 | nlmsg_end(skb, nlh); | |
1599 | ||
1600 | /* fib_nl_{new,del}rule handling looks for net from skb->sk */ | |
1601 | skb->sk = dev_net(dev)->rtnl; | |
1602 | if (add_it) { | |
c21ef3e3 | 1603 | err = fib_nl_newrule(skb, nlh, NULL); |
1aa6c4f6 DA |
1604 | if (err == -EEXIST) |
1605 | err = 0; | |
1606 | } else { | |
c21ef3e3 | 1607 | err = fib_nl_delrule(skb, nlh, NULL); |
1aa6c4f6 DA |
1608 | if (err == -ENOENT) |
1609 | err = 0; | |
1610 | } | |
1611 | nlmsg_free(skb); | |
1612 | ||
1613 | return err; | |
1614 | ||
1615 | nla_put_failure: | |
1616 | nlmsg_free(skb); | |
1617 | ||
1618 | return -EMSGSIZE; | |
1619 | } | |
1620 | ||
1621 | static int vrf_add_fib_rules(const struct net_device *dev) | |
1622 | { | |
1623 | int err; | |
1624 | ||
1625 | err = vrf_fib_rule(dev, AF_INET, true); | |
1626 | if (err < 0) | |
1627 | goto out_err; | |
1628 | ||
1629 | err = vrf_fib_rule(dev, AF_INET6, true); | |
1630 | if (err < 0) | |
1631 | goto ipv6_err; | |
1632 | ||
e58e4159 DA |
1633 | #if IS_ENABLED(CONFIG_IP_MROUTE_MULTIPLE_TABLES) |
1634 | err = vrf_fib_rule(dev, RTNL_FAMILY_IPMR, true); | |
1635 | if (err < 0) | |
1636 | goto ipmr_err; | |
1637 | #endif | |
1638 | ||
e4a38c0c PR |
1639 | #if IS_ENABLED(CONFIG_IPV6_MROUTE_MULTIPLE_TABLES) |
1640 | err = vrf_fib_rule(dev, RTNL_FAMILY_IP6MR, true); | |
1641 | if (err < 0) | |
1642 | goto ip6mr_err; | |
1643 | #endif | |
1644 | ||
1aa6c4f6 DA |
1645 | return 0; |
1646 | ||
e4a38c0c PR |
1647 | #if IS_ENABLED(CONFIG_IPV6_MROUTE_MULTIPLE_TABLES) |
1648 | ip6mr_err: | |
1649 | vrf_fib_rule(dev, RTNL_FAMILY_IPMR, false); | |
1650 | #endif | |
1651 | ||
e58e4159 DA |
1652 | #if IS_ENABLED(CONFIG_IP_MROUTE_MULTIPLE_TABLES) |
1653 | ipmr_err: | |
1654 | vrf_fib_rule(dev, AF_INET6, false); | |
1655 | #endif | |
1656 | ||
1aa6c4f6 DA |
1657 | ipv6_err: |
1658 | vrf_fib_rule(dev, AF_INET, false); | |
1659 | ||
1660 | out_err: | |
1661 | netdev_err(dev, "Failed to add FIB rules.\n"); | |
1662 | return err; | |
1663 | } | |
1664 | ||
193125db DA |
1665 | static void vrf_setup(struct net_device *dev) |
1666 | { | |
1667 | ether_setup(dev); | |
1668 | ||
1669 | /* Initialize the device structure. */ | |
1670 | dev->netdev_ops = &vrf_netdev_ops; | |
ee15ee5d | 1671 | dev->l3mdev_ops = &vrf_l3mdev_ops; |
193125db | 1672 | dev->ethtool_ops = &vrf_ethtool_ops; |
cf124db5 | 1673 | dev->needs_free_netdev = true; |
193125db DA |
1674 | |
1675 | /* Fill in device structure with ethernet-generic values. */ | |
1676 | eth_hw_addr_random(dev); | |
1677 | ||
1678 | /* don't acquire vrf device's netif_tx_lock when transmitting */ | |
1679 | dev->features |= NETIF_F_LLTX; | |
1680 | ||
1681 | /* don't allow vrf devices to change network namespaces. */ | |
1682 | dev->features |= NETIF_F_NETNS_LOCAL; | |
7889681f DA |
1683 | |
1684 | /* does not make sense for a VLAN to be added to a vrf device */ | |
1685 | dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1686 | ||
1687 | /* enable offload features */ | |
1688 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
cb160394 | 1689 | dev->features |= NETIF_F_RXCSUM | NETIF_F_HW_CSUM | NETIF_F_SCTP_CRC; |
7889681f DA |
1690 | dev->features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA; |
1691 | ||
1692 | dev->hw_features = dev->features; | |
1693 | dev->hw_enc_features = dev->features; | |
1694 | ||
1695 | /* default to no qdisc; user can add if desired */ | |
1696 | dev->priv_flags |= IFF_NO_QUEUE; | |
1017e098 | 1697 | dev->priv_flags |= IFF_NO_RX_HANDLER; |
6819e3f6 | 1698 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
ad49bc63 | 1699 | |
5055376a ML |
1700 | /* VRF devices do not care about MTU, but if the MTU is set |
1701 | * too low then the ipv4 and ipv6 protocols are disabled | |
1702 | * which breaks networking. | |
1703 | */ | |
1704 | dev->min_mtu = IPV6_MIN_MTU; | |
9bb392f6 ND |
1705 | dev->max_mtu = IP6_MAX_MTU; |
1706 | dev->mtu = dev->max_mtu; | |
193125db DA |
1707 | } |
1708 | ||
a8b8a889 MS |
1709 | static int vrf_validate(struct nlattr *tb[], struct nlattr *data[], |
1710 | struct netlink_ext_ack *extack) | |
193125db DA |
1711 | { |
1712 | if (tb[IFLA_ADDRESS]) { | |
53b94835 DA |
1713 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { |
1714 | NL_SET_ERR_MSG(extack, "Invalid hardware address"); | |
193125db | 1715 | return -EINVAL; |
53b94835 DA |
1716 | } |
1717 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
1718 | NL_SET_ERR_MSG(extack, "Invalid hardware address"); | |
193125db | 1719 | return -EADDRNOTAVAIL; |
53b94835 | 1720 | } |
193125db DA |
1721 | } |
1722 | return 0; | |
1723 | } | |
1724 | ||
1725 | static void vrf_dellink(struct net_device *dev, struct list_head *head) | |
1726 | { | |
f630c38e NA |
1727 | struct net_device *port_dev; |
1728 | struct list_head *iter; | |
1729 | ||
1730 | netdev_for_each_lower_dev(dev, port_dev, iter) | |
1731 | vrf_del_slave(dev, port_dev); | |
1732 | ||
c8baec38 AM |
1733 | vrf_map_unregister_dev(dev); |
1734 | ||
193125db DA |
1735 | unregister_netdevice_queue(dev, head); |
1736 | } | |
1737 | ||
1738 | static int vrf_newlink(struct net *src_net, struct net_device *dev, | |
7a3f4a18 MS |
1739 | struct nlattr *tb[], struct nlattr *data[], |
1740 | struct netlink_ext_ack *extack) | |
193125db DA |
1741 | { |
1742 | struct net_vrf *vrf = netdev_priv(dev); | |
c8baec38 | 1743 | struct netns_vrf *nn_vrf; |
097d3c95 DA |
1744 | bool *add_fib_rules; |
1745 | struct net *net; | |
1aa6c4f6 | 1746 | int err; |
193125db | 1747 | |
53b94835 DA |
1748 | if (!data || !data[IFLA_VRF_TABLE]) { |
1749 | NL_SET_ERR_MSG(extack, "VRF table id is missing"); | |
193125db | 1750 | return -EINVAL; |
53b94835 | 1751 | } |
193125db DA |
1752 | |
1753 | vrf->tb_id = nla_get_u32(data[IFLA_VRF_TABLE]); | |
53b94835 DA |
1754 | if (vrf->tb_id == RT_TABLE_UNSPEC) { |
1755 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VRF_TABLE], | |
1756 | "Invalid VRF table id"); | |
24c63bbc | 1757 | return -EINVAL; |
53b94835 | 1758 | } |
193125db | 1759 | |
007979ea | 1760 | dev->priv_flags |= IFF_L3MDEV_MASTER; |
193125db | 1761 | |
1aa6c4f6 DA |
1762 | err = register_netdevice(dev); |
1763 | if (err) | |
1764 | goto out; | |
1765 | ||
c8baec38 AM |
1766 | /* mapping between table_id and vrf; |
1767 | * note: such binding could not be done in the dev init function | |
1768 | * because dev->ifindex id is not available yet. | |
1769 | */ | |
1770 | vrf->ifindex = dev->ifindex; | |
1771 | ||
1772 | err = vrf_map_register_dev(dev, extack); | |
1773 | if (err) { | |
1774 | unregister_netdevice(dev); | |
1775 | goto out; | |
1776 | } | |
1777 | ||
097d3c95 | 1778 | net = dev_net(dev); |
c8baec38 AM |
1779 | nn_vrf = net_generic(net, vrf_net_id); |
1780 | ||
1781 | add_fib_rules = &nn_vrf->add_fib_rules; | |
097d3c95 | 1782 | if (*add_fib_rules) { |
1aa6c4f6 DA |
1783 | err = vrf_add_fib_rules(dev); |
1784 | if (err) { | |
c8baec38 | 1785 | vrf_map_unregister_dev(dev); |
1aa6c4f6 DA |
1786 | unregister_netdevice(dev); |
1787 | goto out; | |
1788 | } | |
097d3c95 | 1789 | *add_fib_rules = false; |
1aa6c4f6 DA |
1790 | } |
1791 | ||
1792 | out: | |
1793 | return err; | |
193125db DA |
1794 | } |
1795 | ||
1796 | static size_t vrf_nl_getsize(const struct net_device *dev) | |
1797 | { | |
1798 | return nla_total_size(sizeof(u32)); /* IFLA_VRF_TABLE */ | |
1799 | } | |
1800 | ||
1801 | static int vrf_fillinfo(struct sk_buff *skb, | |
1802 | const struct net_device *dev) | |
1803 | { | |
1804 | struct net_vrf *vrf = netdev_priv(dev); | |
1805 | ||
1806 | return nla_put_u32(skb, IFLA_VRF_TABLE, vrf->tb_id); | |
1807 | } | |
1808 | ||
67eb0331 DA |
1809 | static size_t vrf_get_slave_size(const struct net_device *bond_dev, |
1810 | const struct net_device *slave_dev) | |
1811 | { | |
1812 | return nla_total_size(sizeof(u32)); /* IFLA_VRF_PORT_TABLE */ | |
1813 | } | |
1814 | ||
1815 | static int vrf_fill_slave_info(struct sk_buff *skb, | |
1816 | const struct net_device *vrf_dev, | |
1817 | const struct net_device *slave_dev) | |
1818 | { | |
1819 | struct net_vrf *vrf = netdev_priv(vrf_dev); | |
1820 | ||
1821 | if (nla_put_u32(skb, IFLA_VRF_PORT_TABLE, vrf->tb_id)) | |
1822 | return -EMSGSIZE; | |
1823 | ||
1824 | return 0; | |
1825 | } | |
1826 | ||
193125db DA |
1827 | static const struct nla_policy vrf_nl_policy[IFLA_VRF_MAX + 1] = { |
1828 | [IFLA_VRF_TABLE] = { .type = NLA_U32 }, | |
1829 | }; | |
1830 | ||
1831 | static struct rtnl_link_ops vrf_link_ops __read_mostly = { | |
1832 | .kind = DRV_NAME, | |
1833 | .priv_size = sizeof(struct net_vrf), | |
1834 | ||
1835 | .get_size = vrf_nl_getsize, | |
1836 | .policy = vrf_nl_policy, | |
1837 | .validate = vrf_validate, | |
1838 | .fill_info = vrf_fillinfo, | |
1839 | ||
67eb0331 DA |
1840 | .get_slave_size = vrf_get_slave_size, |
1841 | .fill_slave_info = vrf_fill_slave_info, | |
1842 | ||
193125db DA |
1843 | .newlink = vrf_newlink, |
1844 | .dellink = vrf_dellink, | |
1845 | .setup = vrf_setup, | |
1846 | .maxtype = IFLA_VRF_MAX, | |
1847 | }; | |
1848 | ||
1849 | static int vrf_device_event(struct notifier_block *unused, | |
1850 | unsigned long event, void *ptr) | |
1851 | { | |
1852 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1853 | ||
1854 | /* only care about unregister events to drop slave references */ | |
1855 | if (event == NETDEV_UNREGISTER) { | |
193125db DA |
1856 | struct net_device *vrf_dev; |
1857 | ||
fee6d4c7 | 1858 | if (!netif_is_l3_slave(dev)) |
193125db DA |
1859 | goto out; |
1860 | ||
58aa9087 NA |
1861 | vrf_dev = netdev_master_upper_dev_get(dev); |
1862 | vrf_del_slave(vrf_dev, dev); | |
193125db DA |
1863 | } |
1864 | out: | |
1865 | return NOTIFY_DONE; | |
1866 | } | |
1867 | ||
1868 | static struct notifier_block vrf_notifier_block __read_mostly = { | |
1869 | .notifier_call = vrf_device_event, | |
1870 | }; | |
1871 | ||
c8baec38 AM |
1872 | static int vrf_map_init(struct vrf_map *vmap) |
1873 | { | |
1874 | spin_lock_init(&vmap->vmap_lock); | |
1875 | hash_init(vmap->ht); | |
1876 | ||
1877 | vmap->strict_mode = false; | |
1878 | ||
1879 | return 0; | |
1880 | } | |
1881 | ||
1b6687e3 DA |
1882 | #ifdef CONFIG_SYSCTL |
1883 | static bool vrf_strict_mode(struct vrf_map *vmap) | |
1884 | { | |
1885 | bool strict_mode; | |
1886 | ||
1887 | vrf_map_lock(vmap); | |
1888 | strict_mode = vmap->strict_mode; | |
1889 | vrf_map_unlock(vmap); | |
1890 | ||
1891 | return strict_mode; | |
1892 | } | |
1893 | ||
1894 | static int vrf_strict_mode_change(struct vrf_map *vmap, bool new_mode) | |
1895 | { | |
1896 | bool *cur_mode; | |
1897 | int res = 0; | |
1898 | ||
1899 | vrf_map_lock(vmap); | |
1900 | ||
1901 | cur_mode = &vmap->strict_mode; | |
1902 | if (*cur_mode == new_mode) | |
1903 | goto unlock; | |
1904 | ||
1905 | if (*cur_mode) { | |
1906 | /* disable strict mode */ | |
1907 | *cur_mode = false; | |
1908 | } else { | |
1909 | if (vmap->shared_tables) { | |
1910 | /* we cannot allow strict_mode because there are some | |
1911 | * vrfs that share one or more tables. | |
1912 | */ | |
1913 | res = -EBUSY; | |
1914 | goto unlock; | |
1915 | } | |
1916 | ||
1917 | /* no tables are shared among vrfs, so we can go back | |
1918 | * to 1:1 association between a vrf with its table. | |
1919 | */ | |
1920 | *cur_mode = true; | |
1921 | } | |
1922 | ||
1923 | unlock: | |
1924 | vrf_map_unlock(vmap); | |
1925 | ||
1926 | return res; | |
1927 | } | |
1928 | ||
33306f1a AM |
1929 | static int vrf_shared_table_handler(struct ctl_table *table, int write, |
1930 | void *buffer, size_t *lenp, loff_t *ppos) | |
1931 | { | |
1932 | struct net *net = (struct net *)table->extra1; | |
1933 | struct vrf_map *vmap = netns_vrf_map(net); | |
1934 | int proc_strict_mode = 0; | |
1935 | struct ctl_table tmp = { | |
1936 | .procname = table->procname, | |
1937 | .data = &proc_strict_mode, | |
1938 | .maxlen = sizeof(int), | |
1939 | .mode = table->mode, | |
1940 | .extra1 = SYSCTL_ZERO, | |
1941 | .extra2 = SYSCTL_ONE, | |
1942 | }; | |
1943 | int ret; | |
1944 | ||
1945 | if (!write) | |
1946 | proc_strict_mode = vrf_strict_mode(vmap); | |
1947 | ||
1948 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
1949 | ||
1950 | if (write && ret == 0) | |
1951 | ret = vrf_strict_mode_change(vmap, (bool)proc_strict_mode); | |
1952 | ||
1953 | return ret; | |
1954 | } | |
1955 | ||
1956 | static const struct ctl_table vrf_table[] = { | |
1957 | { | |
1958 | .procname = "strict_mode", | |
1959 | .data = NULL, | |
1960 | .maxlen = sizeof(int), | |
1961 | .mode = 0644, | |
1962 | .proc_handler = vrf_shared_table_handler, | |
1963 | /* set by the vrf_netns_init */ | |
1964 | .extra1 = NULL, | |
1965 | }, | |
1966 | { }, | |
1967 | }; | |
1968 | ||
1b6687e3 | 1969 | static int vrf_netns_init_sysctl(struct net *net, struct netns_vrf *nn_vrf) |
097d3c95 | 1970 | { |
33306f1a | 1971 | struct ctl_table *table; |
097d3c95 | 1972 | |
33306f1a AM |
1973 | table = kmemdup(vrf_table, sizeof(vrf_table), GFP_KERNEL); |
1974 | if (!table) | |
1975 | return -ENOMEM; | |
1976 | ||
1977 | /* init the extra1 parameter with the reference to current netns */ | |
1978 | table[0].extra1 = net; | |
1979 | ||
1980 | nn_vrf->ctl_hdr = register_net_sysctl(net, "net/vrf", table); | |
1981 | if (!nn_vrf->ctl_hdr) { | |
1b6687e3 DA |
1982 | kfree(table); |
1983 | return -ENOMEM; | |
33306f1a AM |
1984 | } |
1985 | ||
097d3c95 | 1986 | return 0; |
33306f1a AM |
1987 | } |
1988 | ||
1b6687e3 | 1989 | static void vrf_netns_exit_sysctl(struct net *net) |
33306f1a AM |
1990 | { |
1991 | struct netns_vrf *nn_vrf = net_generic(net, vrf_net_id); | |
1992 | struct ctl_table *table; | |
1993 | ||
1994 | table = nn_vrf->ctl_hdr->ctl_table_arg; | |
1995 | unregister_net_sysctl_table(nn_vrf->ctl_hdr); | |
1996 | kfree(table); | |
097d3c95 | 1997 | } |
1b6687e3 DA |
1998 | #else |
1999 | static int vrf_netns_init_sysctl(struct net *net, struct netns_vrf *nn_vrf) | |
2000 | { | |
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | static void vrf_netns_exit_sysctl(struct net *net) | |
2005 | { | |
2006 | } | |
2007 | #endif | |
2008 | ||
2009 | /* Initialize per network namespace state */ | |
2010 | static int __net_init vrf_netns_init(struct net *net) | |
2011 | { | |
2012 | struct netns_vrf *nn_vrf = net_generic(net, vrf_net_id); | |
2013 | ||
2014 | nn_vrf->add_fib_rules = true; | |
2015 | vrf_map_init(&nn_vrf->vmap); | |
2016 | ||
2017 | return vrf_netns_init_sysctl(net, nn_vrf); | |
2018 | } | |
2019 | ||
2020 | static void __net_exit vrf_netns_exit(struct net *net) | |
2021 | { | |
2022 | vrf_netns_exit_sysctl(net); | |
2023 | } | |
097d3c95 DA |
2024 | |
2025 | static struct pernet_operations vrf_net_ops __net_initdata = { | |
2026 | .init = vrf_netns_init, | |
33306f1a | 2027 | .exit = vrf_netns_exit, |
097d3c95 | 2028 | .id = &vrf_net_id, |
c8baec38 | 2029 | .size = sizeof(struct netns_vrf), |
097d3c95 DA |
2030 | }; |
2031 | ||
193125db DA |
2032 | static int __init vrf_init_module(void) |
2033 | { | |
2034 | int rc; | |
2035 | ||
193125db DA |
2036 | register_netdevice_notifier(&vrf_notifier_block); |
2037 | ||
097d3c95 | 2038 | rc = register_pernet_subsys(&vrf_net_ops); |
193125db DA |
2039 | if (rc < 0) |
2040 | goto error; | |
2041 | ||
a59a8ffd AM |
2042 | rc = l3mdev_table_lookup_register(L3MDEV_TYPE_VRF, |
2043 | vrf_ifindex_lookup_by_table_id); | |
2044 | if (rc < 0) | |
2045 | goto unreg_pernet; | |
2046 | ||
097d3c95 | 2047 | rc = rtnl_link_register(&vrf_link_ops); |
a59a8ffd AM |
2048 | if (rc < 0) |
2049 | goto table_lookup_unreg; | |
097d3c95 | 2050 | |
193125db DA |
2051 | return 0; |
2052 | ||
a59a8ffd AM |
2053 | table_lookup_unreg: |
2054 | l3mdev_table_lookup_unregister(L3MDEV_TYPE_VRF, | |
2055 | vrf_ifindex_lookup_by_table_id); | |
2056 | ||
2057 | unreg_pernet: | |
2058 | unregister_pernet_subsys(&vrf_net_ops); | |
2059 | ||
193125db DA |
2060 | error: |
2061 | unregister_netdevice_notifier(&vrf_notifier_block); | |
193125db DA |
2062 | return rc; |
2063 | } | |
2064 | ||
193125db | 2065 | module_init(vrf_init_module); |
193125db DA |
2066 | MODULE_AUTHOR("Shrijeet Mukherjee, David Ahern"); |
2067 | MODULE_DESCRIPTION("Device driver to instantiate VRF domains"); | |
2068 | MODULE_LICENSE("GPL"); | |
2069 | MODULE_ALIAS_RTNL_LINK(DRV_NAME); | |
2070 | MODULE_VERSION(DRV_VERSION); |