1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /*
3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
5 */
6
7 #include <linux/skbuff.h>
8 #include <linux/if_arp.h>
9 #include <linux/netdevice.h>
10 #include <linux/if.h>
11 #include <linux/if_vlan.h>
12 #include <net/udp_tunnel.h>
13 #include <net/sch_generic.h>
14 #include <linux/netfilter.h>
15 #include <rdma/ib_addr.h>
16
17 #include "rxe.h"
18 #include "rxe_net.h"
19 #include "rxe_loc.h"
20
21 static struct rxe_recv_sockets recv_sockets;
22
rxe_find_route4(struct rxe_qp * qp,struct net_device * ndev,struct in_addr * saddr,struct in_addr * daddr)23 static struct dst_entry *rxe_find_route4(struct rxe_qp *qp,
24 struct net_device *ndev,
25 struct in_addr *saddr,
26 struct in_addr *daddr)
27 {
28 struct rtable *rt;
29 struct flowi4 fl = { { 0 } };
30
31 memset(&fl, 0, sizeof(fl));
32 fl.flowi4_oif = ndev->ifindex;
33 memcpy(&fl.saddr, saddr, sizeof(*saddr));
34 memcpy(&fl.daddr, daddr, sizeof(*daddr));
35 fl.flowi4_proto = IPPROTO_UDP;
36
37 rt = ip_route_output_key(&init_net, &fl);
38 if (IS_ERR(rt)) {
39 rxe_dbg_qp(qp, "no route to %pI4\n", &daddr->s_addr);
40 return NULL;
41 }
42
43 return &rt->dst;
44 }
45
46 #if IS_ENABLED(CONFIG_IPV6)
rxe_find_route6(struct rxe_qp * qp,struct net_device * ndev,struct in6_addr * saddr,struct in6_addr * daddr)47 static struct dst_entry *rxe_find_route6(struct rxe_qp *qp,
48 struct net_device *ndev,
49 struct in6_addr *saddr,
50 struct in6_addr *daddr)
51 {
52 struct dst_entry *ndst;
53 struct flowi6 fl6 = { { 0 } };
54
55 memset(&fl6, 0, sizeof(fl6));
56 fl6.flowi6_oif = ndev->ifindex;
57 memcpy(&fl6.saddr, saddr, sizeof(*saddr));
58 memcpy(&fl6.daddr, daddr, sizeof(*daddr));
59 fl6.flowi6_proto = IPPROTO_UDP;
60
61 ndst = ipv6_stub->ipv6_dst_lookup_flow(sock_net(recv_sockets.sk6->sk),
62 recv_sockets.sk6->sk, &fl6,
63 NULL);
64 if (IS_ERR(ndst)) {
65 rxe_dbg_qp(qp, "no route to %pI6\n", daddr);
66 return NULL;
67 }
68
69 if (unlikely(ndst->error)) {
70 rxe_dbg_qp(qp, "no route to %pI6\n", daddr);
71 goto put;
72 }
73
74 return ndst;
75 put:
76 dst_release(ndst);
77 return NULL;
78 }
79
80 #else
81
rxe_find_route6(struct rxe_qp * qp,struct net_device * ndev,struct in6_addr * saddr,struct in6_addr * daddr)82 static struct dst_entry *rxe_find_route6(struct rxe_qp *qp,
83 struct net_device *ndev,
84 struct in6_addr *saddr,
85 struct in6_addr *daddr)
86 {
87 return NULL;
88 }
89
90 #endif
91
rxe_find_route(struct net_device * ndev,struct rxe_qp * qp,struct rxe_av * av)92 static struct dst_entry *rxe_find_route(struct net_device *ndev,
93 struct rxe_qp *qp,
94 struct rxe_av *av)
95 {
96 struct dst_entry *dst = NULL;
97
98 if (qp_type(qp) == IB_QPT_RC)
99 dst = sk_dst_get(qp->sk->sk);
100
101 if (!dst || !dst_check(dst, qp->dst_cookie)) {
102 if (dst)
103 dst_release(dst);
104
105 if (av->network_type == RXE_NETWORK_TYPE_IPV4) {
106 struct in_addr *saddr;
107 struct in_addr *daddr;
108
109 saddr = &av->sgid_addr._sockaddr_in.sin_addr;
110 daddr = &av->dgid_addr._sockaddr_in.sin_addr;
111 dst = rxe_find_route4(qp, ndev, saddr, daddr);
112 } else if (av->network_type == RXE_NETWORK_TYPE_IPV6) {
113 struct in6_addr *saddr6;
114 struct in6_addr *daddr6;
115
116 saddr6 = &av->sgid_addr._sockaddr_in6.sin6_addr;
117 daddr6 = &av->dgid_addr._sockaddr_in6.sin6_addr;
118 dst = rxe_find_route6(qp, ndev, saddr6, daddr6);
119 #if IS_ENABLED(CONFIG_IPV6)
120 if (dst)
121 qp->dst_cookie =
122 rt6_get_cookie((struct rt6_info *)dst);
123 #endif
124 }
125
126 if (dst && (qp_type(qp) == IB_QPT_RC)) {
127 dst_hold(dst);
128 sk_dst_set(qp->sk->sk, dst);
129 }
130 }
131 return dst;
132 }
133
rxe_udp_encap_recv(struct sock * sk,struct sk_buff * skb)134 static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
135 {
136 struct udphdr *udph;
137 struct rxe_dev *rxe;
138 struct net_device *ndev = skb->dev;
139 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
140
141 /* takes a reference on rxe->ib_dev
142 * drop when skb is freed
143 */
144 rxe = rxe_get_dev_from_net(ndev);
145 if (!rxe && is_vlan_dev(ndev))
146 rxe = rxe_get_dev_from_net(vlan_dev_real_dev(ndev));
147 if (!rxe)
148 goto drop;
149
150 if (skb_linearize(skb)) {
151 ib_device_put(&rxe->ib_dev);
152 goto drop;
153 }
154
155 udph = udp_hdr(skb);
156 pkt->rxe = rxe;
157 pkt->port_num = 1;
158 pkt->hdr = (u8 *)(udph + 1);
159 pkt->mask = RXE_GRH_MASK;
160 pkt->paylen = be16_to_cpu(udph->len) - sizeof(*udph);
161
162 /* remove udp header */
163 skb_pull(skb, sizeof(struct udphdr));
164
165 rxe_rcv(skb);
166
167 return 0;
168 drop:
169 kfree_skb(skb);
170
171 return 0;
172 }
173
rxe_setup_udp_tunnel(struct net * net,__be16 port,bool ipv6)174 static struct socket *rxe_setup_udp_tunnel(struct net *net, __be16 port,
175 bool ipv6)
176 {
177 int err;
178 struct socket *sock;
179 struct udp_port_cfg udp_cfg = { };
180 struct udp_tunnel_sock_cfg tnl_cfg = { };
181
182 if (ipv6) {
183 udp_cfg.family = AF_INET6;
184 udp_cfg.ipv6_v6only = 1;
185 } else {
186 udp_cfg.family = AF_INET;
187 }
188
189 udp_cfg.local_udp_port = port;
190
191 /* Create UDP socket */
192 err = udp_sock_create(net, &udp_cfg, &sock);
193 if (err < 0)
194 return ERR_PTR(err);
195
196 tnl_cfg.encap_type = 1;
197 tnl_cfg.encap_rcv = rxe_udp_encap_recv;
198
199 /* Setup UDP tunnel */
200 setup_udp_tunnel_sock(net, sock, &tnl_cfg);
201
202 return sock;
203 }
204
rxe_release_udp_tunnel(struct socket * sk)205 static void rxe_release_udp_tunnel(struct socket *sk)
206 {
207 if (sk)
208 udp_tunnel_sock_release(sk);
209 }
210
prepare_udp_hdr(struct sk_buff * skb,__be16 src_port,__be16 dst_port)211 static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port,
212 __be16 dst_port)
213 {
214 struct udphdr *udph;
215
216 __skb_push(skb, sizeof(*udph));
217 skb_reset_transport_header(skb);
218 udph = udp_hdr(skb);
219
220 udph->dest = dst_port;
221 udph->source = src_port;
222 udph->len = htons(skb->len);
223 udph->check = 0;
224 }
225
prepare_ipv4_hdr(struct dst_entry * dst,struct sk_buff * skb,__be32 saddr,__be32 daddr,__u8 proto,__u8 tos,__u8 ttl,__be16 df,bool xnet)226 static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb,
227 __be32 saddr, __be32 daddr, __u8 proto,
228 __u8 tos, __u8 ttl, __be16 df, bool xnet)
229 {
230 struct iphdr *iph;
231
232 skb_scrub_packet(skb, xnet);
233
234 skb_clear_hash(skb);
235 skb_dst_set(skb, dst_clone(dst));
236 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
237
238 skb_push(skb, sizeof(struct iphdr));
239 skb_reset_network_header(skb);
240
241 iph = ip_hdr(skb);
242
243 iph->version = IPVERSION;
244 iph->ihl = sizeof(struct iphdr) >> 2;
245 iph->tot_len = htons(skb->len);
246 iph->frag_off = df;
247 iph->protocol = proto;
248 iph->tos = tos;
249 iph->daddr = daddr;
250 iph->saddr = saddr;
251 iph->ttl = ttl;
252 __ip_select_ident(dev_net(dst->dev), iph,
253 skb_shinfo(skb)->gso_segs ?: 1);
254 }
255
prepare_ipv6_hdr(struct dst_entry * dst,struct sk_buff * skb,struct in6_addr * saddr,struct in6_addr * daddr,__u8 proto,__u8 prio,__u8 ttl)256 static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb,
257 struct in6_addr *saddr, struct in6_addr *daddr,
258 __u8 proto, __u8 prio, __u8 ttl)
259 {
260 struct ipv6hdr *ip6h;
261
262 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
263 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
264 | IPSKB_REROUTED);
265 skb_dst_set(skb, dst_clone(dst));
266
267 __skb_push(skb, sizeof(*ip6h));
268 skb_reset_network_header(skb);
269 ip6h = ipv6_hdr(skb);
270 ip6_flow_hdr(ip6h, prio, htonl(0));
271 ip6h->payload_len = htons(skb->len);
272 ip6h->nexthdr = proto;
273 ip6h->hop_limit = ttl;
274 ip6h->daddr = *daddr;
275 ip6h->saddr = *saddr;
276 ip6h->payload_len = htons(skb->len - sizeof(*ip6h));
277 }
278
prepare4(struct rxe_av * av,struct rxe_pkt_info * pkt,struct sk_buff * skb)279 static int prepare4(struct rxe_av *av, struct rxe_pkt_info *pkt,
280 struct sk_buff *skb)
281 {
282 struct rxe_qp *qp = pkt->qp;
283 struct dst_entry *dst;
284 bool xnet = false;
285 __be16 df = htons(IP_DF);
286 struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr;
287 struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr;
288
289 dst = rxe_find_route(skb->dev, qp, av);
290 if (!dst) {
291 rxe_dbg_qp(qp, "Host not reachable\n");
292 return -EHOSTUNREACH;
293 }
294
295 prepare_udp_hdr(skb, cpu_to_be16(qp->src_port),
296 cpu_to_be16(ROCE_V2_UDP_DPORT));
297
298 prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP,
299 av->grh.traffic_class, av->grh.hop_limit, df, xnet);
300
301 dst_release(dst);
302 return 0;
303 }
304
prepare6(struct rxe_av * av,struct rxe_pkt_info * pkt,struct sk_buff * skb)305 static int prepare6(struct rxe_av *av, struct rxe_pkt_info *pkt,
306 struct sk_buff *skb)
307 {
308 struct rxe_qp *qp = pkt->qp;
309 struct dst_entry *dst;
310 struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr;
311 struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr;
312
313 dst = rxe_find_route(skb->dev, qp, av);
314 if (!dst) {
315 rxe_dbg_qp(qp, "Host not reachable\n");
316 return -EHOSTUNREACH;
317 }
318
319 prepare_udp_hdr(skb, cpu_to_be16(qp->src_port),
320 cpu_to_be16(ROCE_V2_UDP_DPORT));
321
322 prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP,
323 av->grh.traffic_class,
324 av->grh.hop_limit);
325
326 dst_release(dst);
327 return 0;
328 }
329
rxe_prepare(struct rxe_av * av,struct rxe_pkt_info * pkt,struct sk_buff * skb)330 int rxe_prepare(struct rxe_av *av, struct rxe_pkt_info *pkt,
331 struct sk_buff *skb)
332 {
333 int err = 0;
334
335 if (skb->protocol == htons(ETH_P_IP))
336 err = prepare4(av, pkt, skb);
337 else if (skb->protocol == htons(ETH_P_IPV6))
338 err = prepare6(av, pkt, skb);
339
340 if (ether_addr_equal(skb->dev->dev_addr, av->dmac))
341 pkt->mask |= RXE_LOOPBACK_MASK;
342
343 return err;
344 }
345
rxe_skb_tx_dtor(struct sk_buff * skb)346 static void rxe_skb_tx_dtor(struct sk_buff *skb)
347 {
348 struct net_device *ndev = skb->dev;
349 struct rxe_dev *rxe;
350 unsigned int qp_index;
351 struct rxe_qp *qp;
352 int skb_out;
353
354 rxe = rxe_get_dev_from_net(ndev);
355 if (!rxe && is_vlan_dev(ndev))
356 rxe = rxe_get_dev_from_net(vlan_dev_real_dev(ndev));
357 if (WARN_ON(!rxe))
358 return;
359
360 qp_index = (int)(uintptr_t)skb->sk->sk_user_data;
361 if (!qp_index)
362 return;
363
364 qp = rxe_pool_get_index(&rxe->qp_pool, qp_index);
365 if (!qp)
366 goto put_dev;
367
368 skb_out = atomic_dec_return(&qp->skb_out);
369 if (qp->need_req_skb && skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW)
370 rxe_sched_task(&qp->send_task);
371
372 rxe_put(qp);
373 put_dev:
374 ib_device_put(&rxe->ib_dev);
375 sock_put(skb->sk);
376 }
377
rxe_send(struct sk_buff * skb,struct rxe_pkt_info * pkt)378 static int rxe_send(struct sk_buff *skb, struct rxe_pkt_info *pkt)
379 {
380 int err;
381 struct sock *sk = pkt->qp->sk->sk;
382
383 sock_hold(sk);
384 skb->sk = sk;
385 skb->destructor = rxe_skb_tx_dtor;
386 atomic_inc(&pkt->qp->skb_out);
387
388 if (skb->protocol == htons(ETH_P_IP))
389 err = ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb);
390 else
391 err = ip6_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb);
392
393 return err;
394 }
395
396 /* fix up a send packet to match the packets
397 * received from UDP before looping them back
398 */
rxe_loopback(struct sk_buff * skb,struct rxe_pkt_info * pkt)399 static int rxe_loopback(struct sk_buff *skb, struct rxe_pkt_info *pkt)
400 {
401 struct sock *sk = pkt->qp->sk->sk;
402
403 memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt));
404
405 sock_hold(sk);
406 skb->sk = sk;
407 skb->destructor = rxe_skb_tx_dtor;
408 atomic_inc(&pkt->qp->skb_out);
409
410 if (skb->protocol == htons(ETH_P_IP))
411 skb_pull(skb, sizeof(struct iphdr));
412 else
413 skb_pull(skb, sizeof(struct ipv6hdr));
414
415 if (WARN_ON(!ib_device_try_get(&pkt->rxe->ib_dev))) {
416 kfree_skb(skb);
417 return -EIO;
418 }
419
420 /* remove udp header */
421 skb_pull(skb, sizeof(struct udphdr));
422
423 rxe_rcv(skb);
424
425 return 0;
426 }
427
rxe_xmit_packet(struct rxe_qp * qp,struct rxe_pkt_info * pkt,struct sk_buff * skb)428 int rxe_xmit_packet(struct rxe_qp *qp, struct rxe_pkt_info *pkt,
429 struct sk_buff *skb)
430 {
431 int err;
432 int is_request = pkt->mask & RXE_REQ_MASK;
433 struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
434 unsigned long flags;
435
436 spin_lock_irqsave(&qp->state_lock, flags);
437 if ((is_request && (qp_state(qp) < IB_QPS_RTS)) ||
438 (!is_request && (qp_state(qp) < IB_QPS_RTR))) {
439 spin_unlock_irqrestore(&qp->state_lock, flags);
440 rxe_dbg_qp(qp, "Packet dropped. QP is not in ready state\n");
441 goto drop;
442 }
443 spin_unlock_irqrestore(&qp->state_lock, flags);
444
445 rxe_icrc_generate(skb, pkt);
446
447 if (pkt->mask & RXE_LOOPBACK_MASK)
448 err = rxe_loopback(skb, pkt);
449 else
450 err = rxe_send(skb, pkt);
451 if (err) {
452 rxe_counter_inc(rxe, RXE_CNT_SEND_ERR);
453 return err;
454 }
455
456 rxe_counter_inc(rxe, RXE_CNT_SENT_PKTS);
457 goto done;
458
459 drop:
460 kfree_skb(skb);
461 err = 0;
462 done:
463 return err;
464 }
465
rxe_init_packet(struct rxe_dev * rxe,struct rxe_av * av,int paylen,struct rxe_pkt_info * pkt)466 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av,
467 int paylen, struct rxe_pkt_info *pkt)
468 {
469 unsigned int hdr_len;
470 struct sk_buff *skb = NULL;
471 struct net_device *ndev;
472 const struct ib_gid_attr *attr;
473 const int port_num = 1;
474
475 attr = rdma_get_gid_attr(&rxe->ib_dev, port_num, av->grh.sgid_index);
476 if (IS_ERR(attr))
477 return NULL;
478
479 if (av->network_type == RXE_NETWORK_TYPE_IPV4)
480 hdr_len = ETH_HLEN + sizeof(struct udphdr) +
481 sizeof(struct iphdr);
482 else
483 hdr_len = ETH_HLEN + sizeof(struct udphdr) +
484 sizeof(struct ipv6hdr);
485
486 rcu_read_lock();
487 ndev = rdma_read_gid_attr_ndev_rcu(attr);
488 if (IS_ERR(ndev)) {
489 rcu_read_unlock();
490 goto out;
491 }
492 skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(ndev),
493 GFP_ATOMIC);
494
495 if (unlikely(!skb)) {
496 rcu_read_unlock();
497 goto out;
498 }
499
500 skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(ndev));
501
502 /* FIXME: hold reference to this netdev until life of this skb. */
503 skb->dev = ndev;
504 rcu_read_unlock();
505
506 if (av->network_type == RXE_NETWORK_TYPE_IPV4)
507 skb->protocol = htons(ETH_P_IP);
508 else
509 skb->protocol = htons(ETH_P_IPV6);
510
511 pkt->rxe = rxe;
512 pkt->port_num = port_num;
513 pkt->hdr = skb_put(skb, paylen);
514 pkt->mask |= RXE_GRH_MASK;
515
516 out:
517 rdma_put_gid_attr(attr);
518 return skb;
519 }
520
521 /*
522 * this is required by rxe_cfg to match rxe devices in
523 * /sys/class/infiniband up with their underlying ethernet devices
524 */
rxe_parent_name(struct rxe_dev * rxe,unsigned int port_num)525 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num)
526 {
527 return rxe->ndev->name;
528 }
529
rxe_net_add(const char * ibdev_name,struct net_device * ndev)530 int rxe_net_add(const char *ibdev_name, struct net_device *ndev)
531 {
532 int err;
533 struct rxe_dev *rxe = NULL;
534
535 rxe = ib_alloc_device(rxe_dev, ib_dev);
536 if (!rxe)
537 return -ENOMEM;
538
539 rxe->ndev = ndev;
540 ib_mark_name_assigned_by_user(&rxe->ib_dev);
541
542 err = rxe_add(rxe, ndev->mtu, ibdev_name);
543 if (err) {
544 ib_dealloc_device(&rxe->ib_dev);
545 return err;
546 }
547
548 return 0;
549 }
550
rxe_port_event(struct rxe_dev * rxe,enum ib_event_type event)551 static void rxe_port_event(struct rxe_dev *rxe,
552 enum ib_event_type event)
553 {
554 struct ib_event ev;
555
556 ev.device = &rxe->ib_dev;
557 ev.element.port_num = 1;
558 ev.event = event;
559
560 ib_dispatch_event(&ev);
561 }
562
563 /* Caller must hold net_info_lock */
rxe_port_up(struct rxe_dev * rxe)564 void rxe_port_up(struct rxe_dev *rxe)
565 {
566 struct rxe_port *port;
567
568 port = &rxe->port;
569 port->attr.state = IB_PORT_ACTIVE;
570
571 rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE);
572 dev_info(&rxe->ib_dev.dev, "set active\n");
573 }
574
575 /* Caller must hold net_info_lock */
rxe_port_down(struct rxe_dev * rxe)576 void rxe_port_down(struct rxe_dev *rxe)
577 {
578 struct rxe_port *port;
579
580 port = &rxe->port;
581 port->attr.state = IB_PORT_DOWN;
582
583 rxe_port_event(rxe, IB_EVENT_PORT_ERR);
584 rxe_counter_inc(rxe, RXE_CNT_LINK_DOWNED);
585 dev_info(&rxe->ib_dev.dev, "set down\n");
586 }
587
rxe_set_port_state(struct rxe_dev * rxe)588 void rxe_set_port_state(struct rxe_dev *rxe)
589 {
590 if (netif_running(rxe->ndev) && netif_carrier_ok(rxe->ndev))
591 rxe_port_up(rxe);
592 else
593 rxe_port_down(rxe);
594 }
595
rxe_notify(struct notifier_block * not_blk,unsigned long event,void * arg)596 static int rxe_notify(struct notifier_block *not_blk,
597 unsigned long event,
598 void *arg)
599 {
600 struct net_device *ndev = netdev_notifier_info_to_dev(arg);
601 struct rxe_dev *rxe = rxe_get_dev_from_net(ndev);
602
603 if (!rxe)
604 return NOTIFY_OK;
605
606 switch (event) {
607 case NETDEV_UNREGISTER:
608 ib_unregister_device_queued(&rxe->ib_dev);
609 break;
610 case NETDEV_UP:
611 rxe_port_up(rxe);
612 break;
613 case NETDEV_DOWN:
614 rxe_port_down(rxe);
615 break;
616 case NETDEV_CHANGEMTU:
617 rxe_dbg_dev(rxe, "%s changed mtu to %d\n", ndev->name, ndev->mtu);
618 rxe_set_mtu(rxe, ndev->mtu);
619 break;
620 case NETDEV_CHANGE:
621 rxe_set_port_state(rxe);
622 break;
623 case NETDEV_REBOOT:
624 case NETDEV_GOING_DOWN:
625 case NETDEV_CHANGEADDR:
626 case NETDEV_CHANGENAME:
627 case NETDEV_FEAT_CHANGE:
628 default:
629 rxe_dbg_dev(rxe, "ignoring netdev event = %ld for %s\n",
630 event, ndev->name);
631 break;
632 }
633
634 ib_device_put(&rxe->ib_dev);
635 return NOTIFY_OK;
636 }
637
638 static struct notifier_block rxe_net_notifier = {
639 .notifier_call = rxe_notify,
640 };
641
rxe_net_ipv4_init(void)642 static int rxe_net_ipv4_init(void)
643 {
644 recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net,
645 htons(ROCE_V2_UDP_DPORT), false);
646 if (IS_ERR(recv_sockets.sk4)) {
647 recv_sockets.sk4 = NULL;
648 pr_err("Failed to create IPv4 UDP tunnel\n");
649 return -1;
650 }
651
652 return 0;
653 }
654
rxe_net_ipv6_init(void)655 static int rxe_net_ipv6_init(void)
656 {
657 #if IS_ENABLED(CONFIG_IPV6)
658
659 recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net,
660 htons(ROCE_V2_UDP_DPORT), true);
661 if (PTR_ERR(recv_sockets.sk6) == -EAFNOSUPPORT) {
662 recv_sockets.sk6 = NULL;
663 pr_warn("IPv6 is not supported, can not create a UDPv6 socket\n");
664 return 0;
665 }
666
667 if (IS_ERR(recv_sockets.sk6)) {
668 recv_sockets.sk6 = NULL;
669 pr_err("Failed to create IPv6 UDP tunnel\n");
670 return -1;
671 }
672 #endif
673 return 0;
674 }
675
rxe_net_exit(void)676 void rxe_net_exit(void)
677 {
678 rxe_release_udp_tunnel(recv_sockets.sk6);
679 rxe_release_udp_tunnel(recv_sockets.sk4);
680 unregister_netdevice_notifier(&rxe_net_notifier);
681 }
682
rxe_net_init(void)683 int rxe_net_init(void)
684 {
685 int err;
686
687 recv_sockets.sk6 = NULL;
688
689 err = rxe_net_ipv4_init();
690 if (err)
691 return err;
692 err = rxe_net_ipv6_init();
693 if (err)
694 goto err_out;
695 err = register_netdevice_notifier(&rxe_net_notifier);
696 if (err) {
697 pr_err("Failed to register netdev notifier\n");
698 goto err_out;
699 }
700 return 0;
701 err_out:
702 rxe_net_exit();
703 return err;
704 }
705