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 struct rxe_recv_sockets recv_sockets;
49
rxe_dma_device(struct rxe_dev * rxe)50 struct device *rxe_dma_device(struct rxe_dev *rxe)
51 {
52 struct net_device *ndev;
53
54 ndev = rxe->ndev;
55
56 if (is_vlan_dev(ndev))
57 ndev = vlan_dev_real_dev(ndev);
58
59 return ndev->dev.parent;
60 }
61
rxe_mcast_add(struct rxe_dev * rxe,union ib_gid * mgid)62 int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid)
63 {
64 int err;
65 unsigned char ll_addr[ETH_ALEN];
66
67 ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr);
68 err = dev_mc_add(rxe->ndev, ll_addr);
69
70 return err;
71 }
72
rxe_mcast_delete(struct rxe_dev * rxe,union ib_gid * mgid)73 int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid)
74 {
75 int err;
76 unsigned char ll_addr[ETH_ALEN];
77
78 ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr);
79 err = dev_mc_del(rxe->ndev, ll_addr);
80
81 return err;
82 }
83
rxe_find_route4(struct net_device * ndev,struct in_addr * saddr,struct in_addr * daddr)84 static struct dst_entry *rxe_find_route4(struct net_device *ndev,
85 struct in_addr *saddr,
86 struct in_addr *daddr)
87 {
88 struct rtable *rt;
89 struct flowi4 fl = { { 0 } };
90
91 memset(&fl, 0, sizeof(fl));
92 fl.flowi4_oif = ndev->ifindex;
93 memcpy(&fl.saddr, saddr, sizeof(*saddr));
94 memcpy(&fl.daddr, daddr, sizeof(*daddr));
95 fl.flowi4_proto = IPPROTO_UDP;
96
97 rt = ip_route_output_key(&init_net, &fl);
98 if (IS_ERR(rt)) {
99 pr_err_ratelimited("no route to %pI4\n", &daddr->s_addr);
100 return NULL;
101 }
102
103 return &rt->dst;
104 }
105
106 #if IS_ENABLED(CONFIG_IPV6)
rxe_find_route6(struct net_device * ndev,struct in6_addr * saddr,struct in6_addr * daddr)107 static struct dst_entry *rxe_find_route6(struct net_device *ndev,
108 struct in6_addr *saddr,
109 struct in6_addr *daddr)
110 {
111 struct dst_entry *ndst;
112 struct flowi6 fl6 = { { 0 } };
113
114 memset(&fl6, 0, sizeof(fl6));
115 fl6.flowi6_oif = ndev->ifindex;
116 memcpy(&fl6.saddr, saddr, sizeof(*saddr));
117 memcpy(&fl6.daddr, daddr, sizeof(*daddr));
118 fl6.flowi6_proto = IPPROTO_UDP;
119
120 if (unlikely(ipv6_stub->ipv6_dst_lookup(sock_net(recv_sockets.sk6->sk),
121 recv_sockets.sk6->sk, &ndst, &fl6))) {
122 pr_err_ratelimited("no route to %pI6\n", daddr);
123 goto put;
124 }
125
126 if (unlikely(ndst->error)) {
127 pr_err("no route to %pI6\n", daddr);
128 goto put;
129 }
130
131 return ndst;
132 put:
133 dst_release(ndst);
134 return NULL;
135 }
136
137 #else
138
rxe_find_route6(struct net_device * ndev,struct in6_addr * saddr,struct in6_addr * daddr)139 static struct dst_entry *rxe_find_route6(struct net_device *ndev,
140 struct in6_addr *saddr,
141 struct in6_addr *daddr)
142 {
143 return NULL;
144 }
145
146 #endif
147
rxe_find_route(struct net_device * ndev,struct rxe_qp * qp,struct rxe_av * av)148 static struct dst_entry *rxe_find_route(struct net_device *ndev,
149 struct rxe_qp *qp,
150 struct rxe_av *av)
151 {
152 struct dst_entry *dst = NULL;
153
154 if (qp_type(qp) == IB_QPT_RC)
155 dst = sk_dst_get(qp->sk->sk);
156
157 if (!dst || !dst_check(dst, qp->dst_cookie)) {
158 if (dst)
159 dst_release(dst);
160
161 if (av->network_type == RDMA_NETWORK_IPV4) {
162 struct in_addr *saddr;
163 struct in_addr *daddr;
164
165 saddr = &av->sgid_addr._sockaddr_in.sin_addr;
166 daddr = &av->dgid_addr._sockaddr_in.sin_addr;
167 dst = rxe_find_route4(ndev, saddr, daddr);
168 } else if (av->network_type == RDMA_NETWORK_IPV6) {
169 struct in6_addr *saddr6;
170 struct in6_addr *daddr6;
171
172 saddr6 = &av->sgid_addr._sockaddr_in6.sin6_addr;
173 daddr6 = &av->dgid_addr._sockaddr_in6.sin6_addr;
174 dst = rxe_find_route6(ndev, saddr6, daddr6);
175 #if IS_ENABLED(CONFIG_IPV6)
176 if (dst)
177 qp->dst_cookie =
178 rt6_get_cookie((struct rt6_info *)dst);
179 #endif
180 }
181
182 if (dst && (qp_type(qp) == IB_QPT_RC)) {
183 dst_hold(dst);
184 sk_dst_set(qp->sk->sk, dst);
185 }
186 }
187 return dst;
188 }
189
rxe_udp_encap_recv(struct sock * sk,struct sk_buff * skb)190 static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
191 {
192 struct udphdr *udph;
193 struct net_device *ndev = skb->dev;
194 struct net_device *rdev = ndev;
195 struct rxe_dev *rxe = rxe_get_dev_from_net(ndev);
196 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
197
198 if (!rxe && is_vlan_dev(rdev)) {
199 rdev = vlan_dev_real_dev(ndev);
200 rxe = rxe_get_dev_from_net(rdev);
201 }
202 if (!rxe)
203 goto drop;
204
205 if (skb_linearize(skb)) {
206 pr_err("skb_linearize failed\n");
207 ib_device_put(&rxe->ib_dev);
208 goto drop;
209 }
210
211 udph = udp_hdr(skb);
212 pkt->rxe = rxe;
213 pkt->port_num = 1;
214 pkt->hdr = (u8 *)(udph + 1);
215 pkt->mask = RXE_GRH_MASK;
216 pkt->paylen = be16_to_cpu(udph->len) - sizeof(*udph);
217
218 rxe_rcv(skb);
219
220 /*
221 * FIXME: this is in the wrong place, it needs to be done when pkt is
222 * destroyed
223 */
224 ib_device_put(&rxe->ib_dev);
225
226 return 0;
227 drop:
228 kfree_skb(skb);
229
230 return 0;
231 }
232
rxe_setup_udp_tunnel(struct net * net,__be16 port,bool ipv6)233 static struct socket *rxe_setup_udp_tunnel(struct net *net, __be16 port,
234 bool ipv6)
235 {
236 int err;
237 struct socket *sock;
238 struct udp_port_cfg udp_cfg = { };
239 struct udp_tunnel_sock_cfg tnl_cfg = { };
240
241 if (ipv6) {
242 udp_cfg.family = AF_INET6;
243 udp_cfg.ipv6_v6only = 1;
244 } else {
245 udp_cfg.family = AF_INET;
246 }
247
248 udp_cfg.local_udp_port = port;
249
250 /* Create UDP socket */
251 err = udp_sock_create(net, &udp_cfg, &sock);
252 if (err < 0) {
253 pr_err("failed to create udp socket. err = %d\n", err);
254 return ERR_PTR(err);
255 }
256
257 tnl_cfg.encap_type = 1;
258 tnl_cfg.encap_rcv = rxe_udp_encap_recv;
259
260 /* Setup UDP tunnel */
261 setup_udp_tunnel_sock(net, sock, &tnl_cfg);
262
263 return sock;
264 }
265
rxe_release_udp_tunnel(struct socket * sk)266 static void rxe_release_udp_tunnel(struct socket *sk)
267 {
268 if (sk)
269 udp_tunnel_sock_release(sk);
270 }
271
prepare_udp_hdr(struct sk_buff * skb,__be16 src_port,__be16 dst_port)272 static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port,
273 __be16 dst_port)
274 {
275 struct udphdr *udph;
276
277 __skb_push(skb, sizeof(*udph));
278 skb_reset_transport_header(skb);
279 udph = udp_hdr(skb);
280
281 udph->dest = dst_port;
282 udph->source = src_port;
283 udph->len = htons(skb->len);
284 udph->check = 0;
285 }
286
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)287 static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb,
288 __be32 saddr, __be32 daddr, __u8 proto,
289 __u8 tos, __u8 ttl, __be16 df, bool xnet)
290 {
291 struct iphdr *iph;
292
293 skb_scrub_packet(skb, xnet);
294
295 skb_clear_hash(skb);
296 skb_dst_set(skb, dst_clone(dst));
297 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
298
299 skb_push(skb, sizeof(struct iphdr));
300 skb_reset_network_header(skb);
301
302 iph = ip_hdr(skb);
303
304 iph->version = IPVERSION;
305 iph->ihl = sizeof(struct iphdr) >> 2;
306 iph->frag_off = df;
307 iph->protocol = proto;
308 iph->tos = tos;
309 iph->daddr = daddr;
310 iph->saddr = saddr;
311 iph->ttl = ttl;
312 __ip_select_ident(dev_net(dst->dev), iph,
313 skb_shinfo(skb)->gso_segs ?: 1);
314 iph->tot_len = htons(skb->len);
315 ip_send_check(iph);
316 }
317
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)318 static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb,
319 struct in6_addr *saddr, struct in6_addr *daddr,
320 __u8 proto, __u8 prio, __u8 ttl)
321 {
322 struct ipv6hdr *ip6h;
323
324 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
325 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
326 | IPSKB_REROUTED);
327 skb_dst_set(skb, dst_clone(dst));
328
329 __skb_push(skb, sizeof(*ip6h));
330 skb_reset_network_header(skb);
331 ip6h = ipv6_hdr(skb);
332 ip6_flow_hdr(ip6h, prio, htonl(0));
333 ip6h->payload_len = htons(skb->len);
334 ip6h->nexthdr = proto;
335 ip6h->hop_limit = ttl;
336 ip6h->daddr = *daddr;
337 ip6h->saddr = *saddr;
338 ip6h->payload_len = htons(skb->len - sizeof(*ip6h));
339 }
340
prepare4(struct rxe_pkt_info * pkt,struct sk_buff * skb)341 static int prepare4(struct rxe_pkt_info *pkt, struct sk_buff *skb)
342 {
343 struct rxe_qp *qp = pkt->qp;
344 struct dst_entry *dst;
345 bool xnet = false;
346 __be16 df = htons(IP_DF);
347 struct rxe_av *av = rxe_get_av(pkt);
348 struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr;
349 struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr;
350
351 dst = rxe_find_route(skb->dev, qp, av);
352 if (!dst) {
353 pr_err("Host not reachable\n");
354 return -EHOSTUNREACH;
355 }
356
357 prepare_udp_hdr(skb, cpu_to_be16(qp->src_port),
358 cpu_to_be16(ROCE_V2_UDP_DPORT));
359
360 prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP,
361 av->grh.traffic_class, av->grh.hop_limit, df, xnet);
362
363 dst_release(dst);
364 return 0;
365 }
366
prepare6(struct rxe_pkt_info * pkt,struct sk_buff * skb)367 static int prepare6(struct rxe_pkt_info *pkt, struct sk_buff *skb)
368 {
369 struct rxe_qp *qp = pkt->qp;
370 struct dst_entry *dst;
371 struct rxe_av *av = rxe_get_av(pkt);
372 struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr;
373 struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr;
374
375 dst = rxe_find_route(skb->dev, qp, av);
376 if (!dst) {
377 pr_err("Host not reachable\n");
378 return -EHOSTUNREACH;
379 }
380
381 prepare_udp_hdr(skb, cpu_to_be16(qp->src_port),
382 cpu_to_be16(ROCE_V2_UDP_DPORT));
383
384 prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP,
385 av->grh.traffic_class,
386 av->grh.hop_limit);
387
388 dst_release(dst);
389 return 0;
390 }
391
rxe_prepare(struct rxe_pkt_info * pkt,struct sk_buff * skb,u32 * crc)392 int rxe_prepare(struct rxe_pkt_info *pkt, struct sk_buff *skb, u32 *crc)
393 {
394 int err = 0;
395
396 if (skb->protocol == htons(ETH_P_IP))
397 err = prepare4(pkt, skb);
398 else if (skb->protocol == htons(ETH_P_IPV6))
399 err = prepare6(pkt, skb);
400
401 *crc = rxe_icrc_hdr(pkt, skb);
402
403 if (ether_addr_equal(skb->dev->dev_addr, rxe_get_av(pkt)->dmac))
404 pkt->mask |= RXE_LOOPBACK_MASK;
405
406 return err;
407 }
408
rxe_skb_tx_dtor(struct sk_buff * skb)409 static void rxe_skb_tx_dtor(struct sk_buff *skb)
410 {
411 struct sock *sk = skb->sk;
412 struct rxe_qp *qp = sk->sk_user_data;
413 int skb_out = atomic_dec_return(&qp->skb_out);
414
415 if (unlikely(qp->need_req_skb &&
416 skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW))
417 rxe_run_task(&qp->req.task, 1);
418
419 rxe_drop_ref(qp);
420 }
421
rxe_send(struct rxe_pkt_info * pkt,struct sk_buff * skb)422 int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb)
423 {
424 int err;
425
426 skb->destructor = rxe_skb_tx_dtor;
427 skb->sk = pkt->qp->sk->sk;
428
429 rxe_add_ref(pkt->qp);
430 atomic_inc(&pkt->qp->skb_out);
431
432 if (skb->protocol == htons(ETH_P_IP)) {
433 err = ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb);
434 } else if (skb->protocol == htons(ETH_P_IPV6)) {
435 err = ip6_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb);
436 } else {
437 pr_err("Unknown layer 3 protocol: %d\n", skb->protocol);
438 atomic_dec(&pkt->qp->skb_out);
439 rxe_drop_ref(pkt->qp);
440 kfree_skb(skb);
441 return -EINVAL;
442 }
443
444 if (unlikely(net_xmit_eval(err))) {
445 pr_debug("error sending packet: %d\n", err);
446 return -EAGAIN;
447 }
448
449 return 0;
450 }
451
rxe_loopback(struct sk_buff * skb)452 void rxe_loopback(struct sk_buff *skb)
453 {
454 rxe_rcv(skb);
455 }
456
rxe_init_packet(struct rxe_dev * rxe,struct rxe_av * av,int paylen,struct rxe_pkt_info * pkt)457 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av,
458 int paylen, struct rxe_pkt_info *pkt)
459 {
460 unsigned int hdr_len;
461 struct sk_buff *skb = NULL;
462 struct net_device *ndev;
463 const struct ib_gid_attr *attr;
464 const int port_num = 1;
465
466 attr = rdma_get_gid_attr(&rxe->ib_dev, port_num, av->grh.sgid_index);
467 if (IS_ERR(attr))
468 return NULL;
469
470 if (av->network_type == RDMA_NETWORK_IPV4)
471 hdr_len = ETH_HLEN + sizeof(struct udphdr) +
472 sizeof(struct iphdr);
473 else
474 hdr_len = ETH_HLEN + sizeof(struct udphdr) +
475 sizeof(struct ipv6hdr);
476
477 rcu_read_lock();
478 ndev = rdma_read_gid_attr_ndev_rcu(attr);
479 if (IS_ERR(ndev)) {
480 rcu_read_unlock();
481 goto out;
482 }
483 skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(ndev),
484 GFP_ATOMIC);
485
486 if (unlikely(!skb)) {
487 rcu_read_unlock();
488 goto out;
489 }
490
491 skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(ndev));
492
493 /* FIXME: hold reference to this netdev until life of this skb. */
494 skb->dev = ndev;
495 rcu_read_unlock();
496
497 if (av->network_type == RDMA_NETWORK_IPV4)
498 skb->protocol = htons(ETH_P_IP);
499 else
500 skb->protocol = htons(ETH_P_IPV6);
501
502 pkt->rxe = rxe;
503 pkt->port_num = port_num;
504 pkt->hdr = skb_put_zero(skb, paylen);
505 pkt->mask |= RXE_GRH_MASK;
506
507 out:
508 rdma_put_gid_attr(attr);
509 return skb;
510 }
511
512 /*
513 * this is required by rxe_cfg to match rxe devices in
514 * /sys/class/infiniband up with their underlying ethernet devices
515 */
rxe_parent_name(struct rxe_dev * rxe,unsigned int port_num)516 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num)
517 {
518 return rxe->ndev->name;
519 }
520
rxe_link_layer(struct rxe_dev * rxe,unsigned int port_num)521 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num)
522 {
523 return IB_LINK_LAYER_ETHERNET;
524 }
525
rxe_net_add(const char * ibdev_name,struct net_device * ndev)526 int rxe_net_add(const char *ibdev_name, struct net_device *ndev)
527 {
528 int err;
529 struct rxe_dev *rxe = NULL;
530
531 rxe = ib_alloc_device(rxe_dev, ib_dev);
532 if (!rxe)
533 return -ENOMEM;
534
535 rxe->ndev = ndev;
536
537 err = rxe_add(rxe, ndev->mtu, ibdev_name);
538 if (err) {
539 ib_dealloc_device(&rxe->ib_dev);
540 return err;
541 }
542
543 return 0;
544 }
545
rxe_port_event(struct rxe_dev * rxe,enum ib_event_type event)546 static void rxe_port_event(struct rxe_dev *rxe,
547 enum ib_event_type event)
548 {
549 struct ib_event ev;
550
551 ev.device = &rxe->ib_dev;
552 ev.element.port_num = 1;
553 ev.event = event;
554
555 ib_dispatch_event(&ev);
556 }
557
558 /* Caller must hold net_info_lock */
rxe_port_up(struct rxe_dev * rxe)559 void rxe_port_up(struct rxe_dev *rxe)
560 {
561 struct rxe_port *port;
562
563 port = &rxe->port;
564 port->attr.state = IB_PORT_ACTIVE;
565
566 rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE);
567 dev_info(&rxe->ib_dev.dev, "set active\n");
568 }
569
570 /* Caller must hold net_info_lock */
rxe_port_down(struct rxe_dev * rxe)571 void rxe_port_down(struct rxe_dev *rxe)
572 {
573 struct rxe_port *port;
574
575 port = &rxe->port;
576 port->attr.state = IB_PORT_DOWN;
577
578 rxe_port_event(rxe, IB_EVENT_PORT_ERR);
579 rxe_counter_inc(rxe, RXE_CNT_LINK_DOWNED);
580 dev_info(&rxe->ib_dev.dev, "set down\n");
581 }
582
rxe_set_port_state(struct rxe_dev * rxe)583 void rxe_set_port_state(struct rxe_dev *rxe)
584 {
585 if (netif_running(rxe->ndev) && netif_carrier_ok(rxe->ndev))
586 rxe_port_up(rxe);
587 else
588 rxe_port_down(rxe);
589 }
590
rxe_notify(struct notifier_block * not_blk,unsigned long event,void * arg)591 static int rxe_notify(struct notifier_block *not_blk,
592 unsigned long event,
593 void *arg)
594 {
595 struct net_device *ndev = netdev_notifier_info_to_dev(arg);
596 struct rxe_dev *rxe = rxe_get_dev_from_net(ndev);
597
598 if (!rxe)
599 return NOTIFY_OK;
600
601 switch (event) {
602 case NETDEV_UNREGISTER:
603 ib_unregister_device_queued(&rxe->ib_dev);
604 break;
605 case NETDEV_UP:
606 rxe_port_up(rxe);
607 break;
608 case NETDEV_DOWN:
609 rxe_port_down(rxe);
610 break;
611 case NETDEV_CHANGEMTU:
612 pr_info("%s changed mtu to %d\n", ndev->name, ndev->mtu);
613 rxe_set_mtu(rxe, ndev->mtu);
614 break;
615 case NETDEV_CHANGE:
616 rxe_set_port_state(rxe);
617 break;
618 case NETDEV_REBOOT:
619 case NETDEV_GOING_DOWN:
620 case NETDEV_CHANGEADDR:
621 case NETDEV_CHANGENAME:
622 case NETDEV_FEAT_CHANGE:
623 default:
624 pr_info("ignoring netdev event = %ld for %s\n",
625 event, ndev->name);
626 break;
627 }
628
629 ib_device_put(&rxe->ib_dev);
630 return NOTIFY_OK;
631 }
632
633 static struct notifier_block rxe_net_notifier = {
634 .notifier_call = rxe_notify,
635 };
636
rxe_net_ipv4_init(void)637 static int rxe_net_ipv4_init(void)
638 {
639 recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net,
640 htons(ROCE_V2_UDP_DPORT), false);
641 if (IS_ERR(recv_sockets.sk4)) {
642 recv_sockets.sk4 = NULL;
643 pr_err("Failed to create IPv4 UDP tunnel\n");
644 return -1;
645 }
646
647 return 0;
648 }
649
rxe_net_ipv6_init(void)650 static int rxe_net_ipv6_init(void)
651 {
652 #if IS_ENABLED(CONFIG_IPV6)
653
654 recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net,
655 htons(ROCE_V2_UDP_DPORT), true);
656 if (IS_ERR(recv_sockets.sk6)) {
657 recv_sockets.sk6 = NULL;
658 pr_err("Failed to create IPv6 UDP tunnel\n");
659 return -1;
660 }
661 #endif
662 return 0;
663 }
664
rxe_net_exit(void)665 void rxe_net_exit(void)
666 {
667 rxe_release_udp_tunnel(recv_sockets.sk6);
668 rxe_release_udp_tunnel(recv_sockets.sk4);
669 unregister_netdevice_notifier(&rxe_net_notifier);
670 }
671
rxe_net_init(void)672 int rxe_net_init(void)
673 {
674 int err;
675
676 recv_sockets.sk6 = NULL;
677
678 err = rxe_net_ipv4_init();
679 if (err)
680 return err;
681 err = rxe_net_ipv6_init();
682 if (err)
683 goto err_out;
684 err = register_netdevice_notifier(&rxe_net_notifier);
685 if (err) {
686 pr_err("Failed to register netdev notifier\n");
687 goto err_out;
688 }
689 return 0;
690 err_out:
691 rxe_net_exit();
692 return err;
693 }
694
