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Linux 4.19.133
[linux/fpc-iii.git] / drivers / infiniband / sw / rxe / rxe_net.c
blob7903bd5c639eaa4ec076d6b37a31cc985fd32f27
1 /*
2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/skbuff.h>
35 #include <linux/if_arp.h>
36 #include <linux/netdevice.h>
37 #include <linux/if.h>
38 #include <linux/if_vlan.h>
39 #include <net/udp_tunnel.h>
40 #include <net/sch_generic.h>
41 #include <linux/netfilter.h>
42 #include <rdma/ib_addr.h>
43
44 #include "rxe.h"
45 #include "rxe_net.h"
46 #include "rxe_loc.h"
47
48 static LIST_HEAD(rxe_dev_list);
49 static DEFINE_SPINLOCK(dev_list_lock); /* spinlock for device list */
50
51 struct rxe_dev *net_to_rxe(struct net_device *ndev)
52 {
53 struct rxe_dev *rxe;
54 struct rxe_dev *found = NULL;
55
56 spin_lock_bh(&dev_list_lock);
57 list_for_each_entry(rxe, &rxe_dev_list, list) {
58 if (rxe->ndev == ndev) {
59 found = rxe;
60 break;
61 }
62 }
63 spin_unlock_bh(&dev_list_lock);
64
65 return found;
66 }
67
68 struct rxe_dev *get_rxe_by_name(const char *name)
69 {
70 struct rxe_dev *rxe;
71 struct rxe_dev *found = NULL;
72
73 spin_lock_bh(&dev_list_lock);
74 list_for_each_entry(rxe, &rxe_dev_list, list) {
75 if (!strcmp(name, rxe->ib_dev.name)) {
76 found = rxe;
77 break;
78 }
79 }
80 spin_unlock_bh(&dev_list_lock);
81 return found;
82 }
83
84
85 static struct rxe_recv_sockets recv_sockets;
86
87 struct device *rxe_dma_device(struct rxe_dev *rxe)
88 {
89 struct net_device *ndev;
90
91 ndev = rxe->ndev;
92
93 if (is_vlan_dev(ndev))
94 ndev = vlan_dev_real_dev(ndev);
95
96 return ndev->dev.parent;
97 }
98
99 int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid)
100 {
101 int err;
102 unsigned char ll_addr[ETH_ALEN];
103
104 ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr);
105 err = dev_mc_add(rxe->ndev, ll_addr);
106
107 return err;
108 }
109
110 int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid)
111 {
112 int err;
113 unsigned char ll_addr[ETH_ALEN];
114
115 ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr);
116 err = dev_mc_del(rxe->ndev, ll_addr);
117
118 return err;
119 }
120
121 static struct dst_entry *rxe_find_route4(struct net_device *ndev,
122 struct in_addr *saddr,
123 struct in_addr *daddr)
124 {
125 struct rtable *rt;
126 struct flowi4 fl = { { 0 } };
127
128 memset(&fl, 0, sizeof(fl));
129 fl.flowi4_oif = ndev->ifindex;
130 memcpy(&fl.saddr, saddr, sizeof(*saddr));
131 memcpy(&fl.daddr, daddr, sizeof(*daddr));
132 fl.flowi4_proto = IPPROTO_UDP;
133
134 rt = ip_route_output_key(&init_net, &fl);
135 if (IS_ERR(rt)) {
136 pr_err_ratelimited("no route to %pI4\n", &daddr->s_addr);
137 return NULL;
138 }
139
140 return &rt->dst;
141 }
142
143 #if IS_ENABLED(CONFIG_IPV6)
144 static struct dst_entry *rxe_find_route6(struct net_device *ndev,
145 struct in6_addr *saddr,
146 struct in6_addr *daddr)
147 {
148 struct dst_entry *ndst;
149 struct flowi6 fl6 = { { 0 } };
150
151 memset(&fl6, 0, sizeof(fl6));
152 fl6.flowi6_oif = ndev->ifindex;
153 memcpy(&fl6.saddr, saddr, sizeof(*saddr));
154 memcpy(&fl6.daddr, daddr, sizeof(*daddr));
155 fl6.flowi6_proto = IPPROTO_UDP;
156
157 ndst = ipv6_stub->ipv6_dst_lookup_flow(sock_net(recv_sockets.sk6->sk),
158 recv_sockets.sk6->sk, &fl6,
159 NULL);
160 if (unlikely(IS_ERR(ndst))) {
161 pr_err_ratelimited("no route to %pI6\n", daddr);
162 return NULL;
163 }
164
165 if (unlikely(ndst->error)) {
166 pr_err("no route to %pI6\n", daddr);
167 goto put;
168 }
169
170 return ndst;
171 put:
172 dst_release(ndst);
173 return NULL;
174 }
175
176 #else
177
178 static struct dst_entry *rxe_find_route6(struct net_device *ndev,
179 struct in6_addr *saddr,
180 struct in6_addr *daddr)
181 {
182 return NULL;
183 }
184
185 #endif
186
187 static struct dst_entry *rxe_find_route(struct rxe_dev *rxe,
188 struct rxe_qp *qp,
189 struct rxe_av *av)
190 {
191 const struct ib_gid_attr *attr;
192 struct dst_entry *dst = NULL;
193 struct net_device *ndev;
194
195 attr = rdma_get_gid_attr(&rxe->ib_dev, qp->attr.port_num,
196 av->grh.sgid_index);
197 if (IS_ERR(attr))
198 return NULL;
199 ndev = attr->ndev;
200
201 if (qp_type(qp) == IB_QPT_RC)
202 dst = sk_dst_get(qp->sk->sk);
203
204 if (!dst || !dst_check(dst, qp->dst_cookie)) {
205 if (dst)
206 dst_release(dst);
207
208 if (av->network_type == RDMA_NETWORK_IPV4) {
209 struct in_addr *saddr;
210 struct in_addr *daddr;
211
212 saddr = &av->sgid_addr._sockaddr_in.sin_addr;
213 daddr = &av->dgid_addr._sockaddr_in.sin_addr;
214 dst = rxe_find_route4(ndev, saddr, daddr);
215 } else if (av->network_type == RDMA_NETWORK_IPV6) {
216 struct in6_addr *saddr6;
217 struct in6_addr *daddr6;
218
219 saddr6 = &av->sgid_addr._sockaddr_in6.sin6_addr;
220 daddr6 = &av->dgid_addr._sockaddr_in6.sin6_addr;
221 dst = rxe_find_route6(ndev, saddr6, daddr6);
222 #if IS_ENABLED(CONFIG_IPV6)
223 if (dst)
224 qp->dst_cookie =
225 rt6_get_cookie((struct rt6_info *)dst);
226 #endif
227 }
228
229 if (dst && (qp_type(qp) == IB_QPT_RC)) {
230 dst_hold(dst);
231 sk_dst_set(qp->sk->sk, dst);
232 }
233 }
234 rdma_put_gid_attr(attr);
235 return dst;
236 }
237
238 static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
239 {
240 struct udphdr *udph;
241 struct net_device *ndev = skb->dev;
242 struct net_device *rdev = ndev;
243 struct rxe_dev *rxe = net_to_rxe(ndev);
244 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
245
246 if (!rxe && is_vlan_dev(rdev)) {
247 rdev = vlan_dev_real_dev(ndev);
248 rxe = net_to_rxe(rdev);
249 }
250 if (!rxe)
251 goto drop;
252
253 if (skb_linearize(skb)) {
254 pr_err("skb_linearize failed\n");
255 goto drop;
256 }
257
258 udph = udp_hdr(skb);
259 pkt->rxe = rxe;
260 pkt->port_num = 1;
261 pkt->hdr = (u8 *)(udph + 1);
262 pkt->mask = RXE_GRH_MASK;
263 pkt->paylen = be16_to_cpu(udph->len) - sizeof(*udph);
264
265 rxe_rcv(skb);
266
267 return 0;
268 drop:
269 kfree_skb(skb);
270
271 return 0;
272 }
273
274 static struct socket *rxe_setup_udp_tunnel(struct net *net, __be16 port,
275 bool ipv6)
276 {
277 int err;
278 struct socket *sock;
279 struct udp_port_cfg udp_cfg = { };
280 struct udp_tunnel_sock_cfg tnl_cfg = { };
281
282 if (ipv6) {
283 udp_cfg.family = AF_INET6;
284 udp_cfg.ipv6_v6only = 1;
285 } else {
286 udp_cfg.family = AF_INET;
287 }
288
289 udp_cfg.local_udp_port = port;
290
291 /* Create UDP socket */
292 err = udp_sock_create(net, &udp_cfg, &sock);
293 if (err < 0) {
294 pr_err("failed to create udp socket. err = %d\n", err);
295 return ERR_PTR(err);
296 }
297
298 tnl_cfg.encap_type = 1;
299 tnl_cfg.encap_rcv = rxe_udp_encap_recv;
300
301 /* Setup UDP tunnel */
302 setup_udp_tunnel_sock(net, sock, &tnl_cfg);
303
304 return sock;
305 }
306
307 static void rxe_release_udp_tunnel(struct socket *sk)
308 {
309 if (sk)
310 udp_tunnel_sock_release(sk);
311 }
312
313 static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port,
314 __be16 dst_port)
315 {
316 struct udphdr *udph;
317
318 __skb_push(skb, sizeof(*udph));
319 skb_reset_transport_header(skb);
320 udph = udp_hdr(skb);
321
322 udph->dest = dst_port;
323 udph->source = src_port;
324 udph->len = htons(skb->len);
325 udph->check = 0;
326 }
327
328 static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb,
329 __be32 saddr, __be32 daddr, __u8 proto,
330 __u8 tos, __u8 ttl, __be16 df, bool xnet)
331 {
332 struct iphdr *iph;
333
334 skb_scrub_packet(skb, xnet);
335
336 skb_clear_hash(skb);
337 skb_dst_set(skb, dst_clone(dst));
338 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
339
340 skb_push(skb, sizeof(struct iphdr));
341 skb_reset_network_header(skb);
342
343 iph = ip_hdr(skb);
344
345 iph->version = IPVERSION;
346 iph->ihl = sizeof(struct iphdr) >> 2;
347 iph->frag_off = df;
348 iph->protocol = proto;
349 iph->tos = tos;
350 iph->daddr = daddr;
351 iph->saddr = saddr;
352 iph->ttl = ttl;
353 __ip_select_ident(dev_net(dst->dev), iph,
354 skb_shinfo(skb)->gso_segs ?: 1);
355 iph->tot_len = htons(skb->len);
356 ip_send_check(iph);
357 }
358
359 static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb,
360 struct in6_addr *saddr, struct in6_addr *daddr,
361 __u8 proto, __u8 prio, __u8 ttl)
362 {
363 struct ipv6hdr *ip6h;
364
365 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
366 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
367 | IPSKB_REROUTED);
368 skb_dst_set(skb, dst_clone(dst));
369
370 __skb_push(skb, sizeof(*ip6h));
371 skb_reset_network_header(skb);
372 ip6h = ipv6_hdr(skb);
373 ip6_flow_hdr(ip6h, prio, htonl(0));
374 ip6h->payload_len = htons(skb->len);
375 ip6h->nexthdr = proto;
376 ip6h->hop_limit = ttl;
377 ip6h->daddr = *daddr;
378 ip6h->saddr = *saddr;
379 ip6h->payload_len = htons(skb->len - sizeof(*ip6h));
380 }
381
382 static int prepare4(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
383 struct sk_buff *skb, struct rxe_av *av)
384 {
385 struct rxe_qp *qp = pkt->qp;
386 struct dst_entry *dst;
387 bool xnet = false;
388 __be16 df = htons(IP_DF);
389 struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr;
390 struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr;
391
392 dst = rxe_find_route(rxe, qp, av);
393 if (!dst) {
394 pr_err("Host not reachable\n");
395 return -EHOSTUNREACH;
396 }
397
398 if (!memcmp(saddr, daddr, sizeof(*daddr)))
399 pkt->mask |= RXE_LOOPBACK_MASK;
400
401 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT),
402 htons(ROCE_V2_UDP_DPORT));
403
404 prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP,
405 av->grh.traffic_class, av->grh.hop_limit, df, xnet);
406
407 dst_release(dst);
408 return 0;
409 }
410
411 static int prepare6(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
412 struct sk_buff *skb, struct rxe_av *av)
413 {
414 struct rxe_qp *qp = pkt->qp;
415 struct dst_entry *dst;
416 struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr;
417 struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr;
418
419 dst = rxe_find_route(rxe, qp, av);
420 if (!dst) {
421 pr_err("Host not reachable\n");
422 return -EHOSTUNREACH;
423 }
424
425 if (!memcmp(saddr, daddr, sizeof(*daddr)))
426 pkt->mask |= RXE_LOOPBACK_MASK;
427
428 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT),
429 htons(ROCE_V2_UDP_DPORT));
430
431 prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP,
432 av->grh.traffic_class,
433 av->grh.hop_limit);
434
435 dst_release(dst);
436 return 0;
437 }
438
439 int rxe_prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
440 struct sk_buff *skb, u32 *crc)
441 {
442 int err = 0;
443 struct rxe_av *av = rxe_get_av(pkt);
444
445 if (av->network_type == RDMA_NETWORK_IPV4)
446 err = prepare4(rxe, pkt, skb, av);
447 else if (av->network_type == RDMA_NETWORK_IPV6)
448 err = prepare6(rxe, pkt, skb, av);
449
450 *crc = rxe_icrc_hdr(pkt, skb);
451
452 return err;
453 }
454
455 static void rxe_skb_tx_dtor(struct sk_buff *skb)
456 {
457 struct sock *sk = skb->sk;
458 struct rxe_qp *qp = sk->sk_user_data;
459 int skb_out = atomic_dec_return(&qp->skb_out);
460
461 if (unlikely(qp->need_req_skb &&
462 skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW))
463 rxe_run_task(&qp->req.task, 1);
464
465 rxe_drop_ref(qp);
466 }
467
468 int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb)
469 {
470 struct rxe_av *av;
471 int err;
472
473 av = rxe_get_av(pkt);
474
475 skb->destructor = rxe_skb_tx_dtor;
476 skb->sk = pkt->qp->sk->sk;
477
478 rxe_add_ref(pkt->qp);
479 atomic_inc(&pkt->qp->skb_out);
480
481 if (av->network_type == RDMA_NETWORK_IPV4) {
482 err = ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb);
483 } else if (av->network_type == RDMA_NETWORK_IPV6) {
484 err = ip6_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb);
485 } else {
486 pr_err("Unknown layer 3 protocol: %d\n", av->network_type);
487 atomic_dec(&pkt->qp->skb_out);
488 rxe_drop_ref(pkt->qp);
489 kfree_skb(skb);
490 return -EINVAL;
491 }
492
493 if (unlikely(net_xmit_eval(err))) {
494 pr_debug("error sending packet: %d\n", err);
495 return -EAGAIN;
496 }
497
498 return 0;
499 }
500
501 void rxe_loopback(struct sk_buff *skb)
502 {
503 rxe_rcv(skb);
504 }
505
506 static inline int addr_same(struct rxe_dev *rxe, struct rxe_av *av)
507 {
508 return rxe->port.port_guid == av->grh.dgid.global.interface_id;
509 }
510
511 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av,
512 int paylen, struct rxe_pkt_info *pkt)
513 {
514 unsigned int hdr_len;
515 struct sk_buff *skb;
516 struct net_device *ndev;
517 const struct ib_gid_attr *attr;
518 const int port_num = 1;
519
520 attr = rdma_get_gid_attr(&rxe->ib_dev, port_num, av->grh.sgid_index);
521 if (IS_ERR(attr))
522 return NULL;
523 ndev = attr->ndev;
524
525 if (av->network_type == RDMA_NETWORK_IPV4)
526 hdr_len = ETH_HLEN + sizeof(struct udphdr) +
527 sizeof(struct iphdr);
528 else
529 hdr_len = ETH_HLEN + sizeof(struct udphdr) +
530 sizeof(struct ipv6hdr);
531
532 skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(ndev),
533 GFP_ATOMIC);
534
535 if (unlikely(!skb))
536 goto out;
537
538 skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(ndev));
539
540 /* FIXME: hold reference to this netdev until life of this skb. */
541 skb->dev = ndev;
542 if (av->network_type == RDMA_NETWORK_IPV4)
543 skb->protocol = htons(ETH_P_IP);
544 else
545 skb->protocol = htons(ETH_P_IPV6);
546
547 pkt->rxe = rxe;
548 pkt->port_num = port_num;
549 pkt->hdr = skb_put_zero(skb, paylen);
550 pkt->mask |= RXE_GRH_MASK;
551
552 out:
553 rdma_put_gid_attr(attr);
554 return skb;
555 }
556
557 /*
558 * this is required by rxe_cfg to match rxe devices in
559 * /sys/class/infiniband up with their underlying ethernet devices
560 */
561 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num)
562 {
563 return rxe->ndev->name;
564 }
565
566 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num)
567 {
568 return IB_LINK_LAYER_ETHERNET;
569 }
570
571 struct rxe_dev *rxe_net_add(struct net_device *ndev)
572 {
573 int err;
574 struct rxe_dev *rxe = NULL;
575
576 rxe = (struct rxe_dev *)ib_alloc_device(sizeof(*rxe));
577 if (!rxe)
578 return NULL;
579
580 rxe->ndev = ndev;
581
582 err = rxe_add(rxe, ndev->mtu);
583 if (err) {
584 ib_dealloc_device(&rxe->ib_dev);
585 return NULL;
586 }
587
588 spin_lock_bh(&dev_list_lock);
589 list_add_tail(&rxe->list, &rxe_dev_list);
590 spin_unlock_bh(&dev_list_lock);
591 return rxe;
592 }
593
594 void rxe_remove_all(void)
595 {
596 spin_lock_bh(&dev_list_lock);
597 while (!list_empty(&rxe_dev_list)) {
598 struct rxe_dev *rxe =
599 list_first_entry(&rxe_dev_list, struct rxe_dev, list);
600
601 list_del(&rxe->list);
602 spin_unlock_bh(&dev_list_lock);
603 rxe_remove(rxe);
604 spin_lock_bh(&dev_list_lock);
605 }
606 spin_unlock_bh(&dev_list_lock);
607 }
608
609 static void rxe_port_event(struct rxe_dev *rxe,
610 enum ib_event_type event)
611 {
612 struct ib_event ev;
613
614 ev.device = &rxe->ib_dev;
615 ev.element.port_num = 1;
616 ev.event = event;
617
618 ib_dispatch_event(&ev);
619 }
620
621 /* Caller must hold net_info_lock */
622 void rxe_port_up(struct rxe_dev *rxe)
623 {
624 struct rxe_port *port;
625
626 port = &rxe->port;
627 port->attr.state = IB_PORT_ACTIVE;
628 port->attr.phys_state = IB_PHYS_STATE_LINK_UP;
629
630 rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE);
631 pr_info("set %s active\n", rxe->ib_dev.name);
632 }
633
634 /* Caller must hold net_info_lock */
635 void rxe_port_down(struct rxe_dev *rxe)
636 {
637 struct rxe_port *port;
638
639 port = &rxe->port;
640 port->attr.state = IB_PORT_DOWN;
641 port->attr.phys_state = IB_PHYS_STATE_LINK_DOWN;
642
643 rxe_port_event(rxe, IB_EVENT_PORT_ERR);
644 pr_info("set %s down\n", rxe->ib_dev.name);
645 }
646
647 static int rxe_notify(struct notifier_block *not_blk,
648 unsigned long event,
649 void *arg)
650 {
651 struct net_device *ndev = netdev_notifier_info_to_dev(arg);
652 struct rxe_dev *rxe = net_to_rxe(ndev);
653
654 if (!rxe)
655 goto out;
656
657 switch (event) {
658 case NETDEV_UNREGISTER:
659 list_del(&rxe->list);
660 rxe_remove(rxe);
661 break;
662 case NETDEV_UP:
663 rxe_port_up(rxe);
664 break;
665 case NETDEV_DOWN:
666 rxe_port_down(rxe);
667 break;
668 case NETDEV_CHANGEMTU:
669 pr_info("%s changed mtu to %d\n", ndev->name, ndev->mtu);
670 rxe_set_mtu(rxe, ndev->mtu);
671 break;
672 case NETDEV_CHANGE:
673 if (netif_running(ndev) && netif_carrier_ok(ndev))
674 rxe_port_up(rxe);
675 else
676 rxe_port_down(rxe);
677 break;
678 case NETDEV_REBOOT:
679 case NETDEV_GOING_DOWN:
680 case NETDEV_CHANGEADDR:
681 case NETDEV_CHANGENAME:
682 case NETDEV_FEAT_CHANGE:
683 default:
684 pr_info("ignoring netdev event = %ld for %s\n",
685 event, ndev->name);
686 break;
687 }
688 out:
689 return NOTIFY_OK;
690 }
691
692 static struct notifier_block rxe_net_notifier = {
693 .notifier_call = rxe_notify,
694 };
695
696 static int rxe_net_ipv4_init(void)
697 {
698 recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net,
699 htons(ROCE_V2_UDP_DPORT), false);
700 if (IS_ERR(recv_sockets.sk4)) {
701 recv_sockets.sk4 = NULL;
702 pr_err("Failed to create IPv4 UDP tunnel\n");
703 return -1;
704 }
705
706 return 0;
707 }
708
709 static int rxe_net_ipv6_init(void)
710 {
711 #if IS_ENABLED(CONFIG_IPV6)
712
713 recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net,
714 htons(ROCE_V2_UDP_DPORT), true);
715 if (IS_ERR(recv_sockets.sk6)) {
716 recv_sockets.sk6 = NULL;
717 pr_err("Failed to create IPv6 UDP tunnel\n");
718 return -1;
719 }
720 #endif
721 return 0;
722 }
723
724 void rxe_net_exit(void)
725 {
726 rxe_release_udp_tunnel(recv_sockets.sk6);
727 rxe_release_udp_tunnel(recv_sockets.sk4);
728 unregister_netdevice_notifier(&rxe_net_notifier);
729 }
730
731 int rxe_net_init(void)
732 {
733 int err;
734
735 recv_sockets.sk6 = NULL;
736
737 err = rxe_net_ipv4_init();
738 if (err)
739 return err;
740 err = rxe_net_ipv6_init();
741 if (err)
742 goto err_out;
743 err = register_netdevice_notifier(&rxe_net_notifier);
744 if (err) {
745 pr_err("Failed to register netdev notifier\n");
746 goto err_out;
747 }
748 return 0;
749 err_out:
750 rxe_net_exit();
751 return err;
752 }
Linux with added FPC-III support