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IB/core: add a helper to check for READ WITH INVALIDATE support
[deliverable/linux.git] / drivers / infiniband / core / cma.c
CommitLineData
e51060f0
SH		 1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
a9474917
SH		 7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
e51060f0 12 *
a9474917
SH		 13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
e51060f0 16 *
a9474917
SH		 17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
e51060f0 20 *
a9474917
SH		 21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
e51060f0 25 *
a9474917
SH		 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
e51060f0
SH		 34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
bee3c3c9 41#include <linux/igmp.h>
e51060f0 42#include <linux/idr.h>
07ebafba 43#include <linux/inetdevice.h>
5a0e3ad6 44#include <linux/slab.h>
e4dd23d7 45#include <linux/module.h>
366cddb4 46#include <net/route.h>
e51060f0 47
4be74b42
HE		 48#include <net/net_namespace.h>
49#include <net/netns/generic.h>
e51060f0 50#include <net/tcp.h>
1f5175ad 51#include <net/ipv6.h>
f887f2ac
HE		 52#include <net/ip_fib.h>
53#include <net/ip6_route.h>
e51060f0
SH		 54
55#include <rdma/rdma_cm.h>
56#include <rdma/rdma_cm_ib.h>
753f618a 57#include <rdma/rdma_netlink.h>
2e2d190c 58#include <rdma/ib.h>
e51060f0
SH		 59#include <rdma/ib_cache.h>
60#include <rdma/ib_cm.h>
61#include <rdma/ib_sa.h>
07ebafba 62#include <rdma/iw_cm.h>
e51060f0 63
218a773f
MB		 64#include "core_priv.h"
65
e51060f0
SH		 66MODULE_AUTHOR("Sean Hefty");
67MODULE_DESCRIPTION("Generic RDMA CM Agent");
68MODULE_LICENSE("Dual BSD/GPL");
69
70#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 71#define CMA_MAX_CM_RETRIES 15
dcb3f974 72#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 73#define CMA_IBOE_PACKET_LIFETIME 18
e51060f0 74
2b1b5b60
SG		 75static const char * const cma_events[] = {
76 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
77 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
78 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
79 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
80 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
81 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
82 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
83 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
84 [RDMA_CM_EVENT_REJECTED] = "rejected",
85 [RDMA_CM_EVENT_ESTABLISHED] = "established",
86 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
87 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
88 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
89 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
90 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
91 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
92};
93
db7489e0 94const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
2b1b5b60
SG		 95{
96 size_t index = event;
97
98 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
99 cma_events[index] : "unrecognized event";
100}
101EXPORT_SYMBOL(rdma_event_msg);
102
e51060f0 103static void cma_add_one(struct ib_device *device);
7c1eb45a 104static void cma_remove_one(struct ib_device *device, void *client_data);
e51060f0
SH		 105
106static struct ib_client cma_client = {
107 .name = "cma",
108 .add = cma_add_one,
109 .remove = cma_remove_one
110};
111
c1a0b23b 112static struct ib_sa_client sa_client;
7a118df3 113static struct rdma_addr_client addr_client;
e51060f0
SH		 114static LIST_HEAD(dev_list);
115static LIST_HEAD(listen_any_list);
116static DEFINE_MUTEX(lock);
117static struct workqueue_struct *cma_wq;
4be74b42 118static int cma_pernet_id;
e51060f0 119
4be74b42
HE		 120struct cma_pernet {
121 struct idr tcp_ps;
122 struct idr udp_ps;
123 struct idr ipoib_ps;
124 struct idr ib_ps;
125};
126
127static struct cma_pernet *cma_pernet(struct net *net)
128{
129 return net_generic(net, cma_pernet_id);
130}
131
132static struct idr *cma_pernet_idr(struct net *net, enum rdma_port_space ps)
aac978e1 133{
4be74b42
HE		 134 struct cma_pernet *pernet = cma_pernet(net);
135
aac978e1
HE		 136 switch (ps) {
137 case RDMA_PS_TCP:
4be74b42 138 return &pernet->tcp_ps;
aac978e1 139 case RDMA_PS_UDP:
4be74b42 140 return &pernet->udp_ps;
aac978e1 141 case RDMA_PS_IPOIB:
4be74b42 142 return &pernet->ipoib_ps;
aac978e1 143 case RDMA_PS_IB:
4be74b42 144 return &pernet->ib_ps;
aac978e1
HE		 145 default:
146 return NULL;
147 }
148}
149
e51060f0
SH		 150struct cma_device {
151 struct list_head list;
152 struct ib_device *device;
e51060f0
SH		 153 struct completion comp;
154 atomic_t refcount;
155 struct list_head id_list;
045959db 156 enum ib_gid_type *default_gid_type;
e51060f0
SH		 157};
158
e51060f0 159struct rdma_bind_list {
aac978e1 160 enum rdma_port_space ps;
e51060f0
SH		 161 struct hlist_head owners;
162 unsigned short port;
163};
164
4be74b42 165static int cma_ps_alloc(struct net *net, enum rdma_port_space ps,
aac978e1
HE		 166 struct rdma_bind_list *bind_list, int snum)
167{
4be74b42 168 struct idr *idr = cma_pernet_idr(net, ps);
aac978e1
HE		 169
170 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
171}
172
4be74b42
HE		 173static struct rdma_bind_list *cma_ps_find(struct net *net,
174 enum rdma_port_space ps, int snum)
aac978e1 175{
4be74b42 176 struct idr *idr = cma_pernet_idr(net, ps);
aac978e1
HE		 177
178 return idr_find(idr, snum);
179}
180
4be74b42 181static void cma_ps_remove(struct net *net, enum rdma_port_space ps, int snum)
aac978e1 182{
4be74b42 183 struct idr *idr = cma_pernet_idr(net, ps);
aac978e1
HE		 184
185 idr_remove(idr, snum);
186}
187
68602120
SH		 188enum {
189 CMA_OPTION_AFONLY,
190};
191
218a773f
MB		 192void cma_ref_dev(struct cma_device *cma_dev)
193{
194 atomic_inc(&cma_dev->refcount);
195}
196
045959db
MB		 197struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
198 void *cookie)
199{
200 struct cma_device *cma_dev;
201 struct cma_device *found_cma_dev = NULL;
202
203 mutex_lock(&lock);
204
205 list_for_each_entry(cma_dev, &dev_list, list)
206 if (filter(cma_dev->device, cookie)) {
207 found_cma_dev = cma_dev;
208 break;
209 }
210
211 if (found_cma_dev)
212 cma_ref_dev(found_cma_dev);
213 mutex_unlock(&lock);
214 return found_cma_dev;
215}
216
217int cma_get_default_gid_type(struct cma_device *cma_dev,
218 unsigned int port)
219{
220 if (port < rdma_start_port(cma_dev->device) ||
221 port > rdma_end_port(cma_dev->device))
222 return -EINVAL;
223
224 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
225}
226
227int cma_set_default_gid_type(struct cma_device *cma_dev,
228 unsigned int port,
229 enum ib_gid_type default_gid_type)
230{
231 unsigned long supported_gids;
232
233 if (port < rdma_start_port(cma_dev->device) ||
234 port > rdma_end_port(cma_dev->device))
235 return -EINVAL;
236
237 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
238
239 if (!(supported_gids & 1 << default_gid_type))
240 return -EINVAL;
241
242 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
243 default_gid_type;
244
245 return 0;
246}
247
248struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
249{
250 return cma_dev->device;
251}
252
e51060f0
SH		 253/*
254 * Device removal can occur at anytime, so we need extra handling to
255 * serialize notifying the user of device removal with other callbacks.
256 * We do this by disabling removal notification while a callback is in process,
257 * and reporting it after the callback completes.
258 */
259struct rdma_id_private {
260 struct rdma_cm_id id;
261
262 struct rdma_bind_list *bind_list;
263 struct hlist_node node;
d02d1f53
SH		 264 struct list_head list; /* listen_any_list or cma_device.list */
265 struct list_head listen_list; /* per device listens */
e51060f0 266 struct cma_device *cma_dev;
c8f6a362 267 struct list_head mc_list;
e51060f0 268
d02d1f53 269 int internal_id;
550e5ca7 270 enum rdma_cm_state state;
e51060f0 271 spinlock_t lock;
c5483388
SH		 272 struct mutex qp_mutex;
273
e51060f0
SH		 274 struct completion comp;
275 atomic_t refcount;
de910bd9 276 struct mutex handler_mutex;
e51060f0
SH		 277
278 int backlog;
279 int timeout_ms;
280 struct ib_sa_query *query;
281 int query_id;
282 union {
283 struct ib_cm_id *ib;
07ebafba 284 struct iw_cm_id *iw;
e51060f0
SH		 285 } cm_id;
286
287 u32 seq_num;
c8f6a362 288 u32 qkey;
e51060f0 289 u32 qp_num;
83e9502d 290 pid_t owner;
68602120 291 u32 options;
e51060f0 292 u8 srq;
a81c994d 293 u8 tos;
a9bb7912 294 u8 reuseaddr;
5b0ec991 295 u8 afonly;
cb57bb84 296 enum ib_gid_type gid_type;
e51060f0
SH		 297};
298
c8f6a362
SH		 299struct cma_multicast {
300 struct rdma_id_private *id_priv;
301 union {
302 struct ib_sa_multicast *ib;
303 } multicast;
304 struct list_head list;
305 void *context;
3f446754 306 struct sockaddr_storage addr;
3c86aa70 307 struct kref mcref;
bee3c3c9 308 bool igmp_joined;
c8f6a362
SH		 309};
310
e51060f0
SH		 311struct cma_work {
312 struct work_struct work;
313 struct rdma_id_private *id;
550e5ca7
NM		 314 enum rdma_cm_state old_state;
315 enum rdma_cm_state new_state;
e51060f0
SH		 316 struct rdma_cm_event event;
317};
318
dd5bdff8
OG		 319struct cma_ndev_work {
320 struct work_struct work;
321 struct rdma_id_private *id;
322 struct rdma_cm_event event;
323};
324
3c86aa70
EC		 325struct iboe_mcast_work {
326 struct work_struct work;
327 struct rdma_id_private *id;
328 struct cma_multicast *mc;
329};
330
e51060f0
SH		 331union cma_ip_addr {
332 struct in6_addr ip6;
333 struct {
1b90c137
AV		 334 __be32 pad[3];
335 __be32 addr;
e51060f0
SH		 336 } ip4;
337};
338
339struct cma_hdr {
340 u8 cma_version;
341 u8 ip_version; /* IP version: 7:4 */
1b90c137 342 __be16 port;
e51060f0
SH		 343 union cma_ip_addr src_addr;
344 union cma_ip_addr dst_addr;
345};
346
e51060f0 347#define CMA_VERSION 0x00
e51060f0 348
4c21b5bc
HE		 349struct cma_req_info {
350 struct ib_device *device;
351 int port;
352 union ib_gid local_gid;
353 __be64 service_id;
354 u16 pkey;
355 bool has_gid:1;
356};
357
550e5ca7 358static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
e51060f0
SH		 359{
360 unsigned long flags;
361 int ret;
362
363 spin_lock_irqsave(&id_priv->lock, flags);
364 ret = (id_priv->state == comp);
365 spin_unlock_irqrestore(&id_priv->lock, flags);
366 return ret;
367}
368
369static int cma_comp_exch(struct rdma_id_private *id_priv,
550e5ca7 370 enum rdma_cm_state comp, enum rdma_cm_state exch)
e51060f0
SH		 371{
372 unsigned long flags;
373 int ret;
374
375 spin_lock_irqsave(&id_priv->lock, flags);
376 if ((ret = (id_priv->state == comp)))
377 id_priv->state = exch;
378 spin_unlock_irqrestore(&id_priv->lock, flags);
379 return ret;
380}
381
550e5ca7
NM		 382static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
383 enum rdma_cm_state exch)
e51060f0
SH		 384{
385 unsigned long flags;
550e5ca7 386 enum rdma_cm_state old;
e51060f0
SH		 387
388 spin_lock_irqsave(&id_priv->lock, flags);
389 old = id_priv->state;
390 id_priv->state = exch;
391 spin_unlock_irqrestore(&id_priv->lock, flags);
392 return old;
393}
394
4c21b5bc 395static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
e51060f0
SH		 396{
397 return hdr->ip_version >> 4;
398}
399
400static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
401{
402 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
403}
404
bee3c3c9 405static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
e51060f0 406{
bee3c3c9
MS		 407 struct in_device *in_dev = NULL;
408
409 if (ndev) {
410 rtnl_lock();
411 in_dev = __in_dev_get_rtnl(ndev);
412 if (in_dev) {
413 if (join)
414 ip_mc_inc_group(in_dev,
415 *(__be32 *)(mgid->raw + 12));
416 else
417 ip_mc_dec_group(in_dev,
418 *(__be32 *)(mgid->raw + 12));
419 }
420 rtnl_unlock();
421 }
422 return (in_dev) ? 0 : -ENODEV;
423}
424
045959db
MB		 425static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
426 struct cma_device *cma_dev)
e51060f0 427{
218a773f 428 cma_ref_dev(cma_dev);
e51060f0 429 id_priv->cma_dev = cma_dev;
045959db 430 id_priv->gid_type = 0;
e51060f0 431 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 432 id_priv->id.route.addr.dev_addr.transport =
433 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0
SH		 434 list_add_tail(&id_priv->list, &cma_dev->id_list);
435}
436
045959db
MB		 437static void cma_attach_to_dev(struct rdma_id_private *id_priv,
438 struct cma_device *cma_dev)
439{
440 _cma_attach_to_dev(id_priv, cma_dev);
441 id_priv->gid_type =
442 cma_dev->default_gid_type[id_priv->id.port_num -
443 rdma_start_port(cma_dev->device)];
444}
445
218a773f 446void cma_deref_dev(struct cma_device *cma_dev)
e51060f0
SH		 447{
448 if (atomic_dec_and_test(&cma_dev->refcount))
449 complete(&cma_dev->comp);
450}
451
3c86aa70
EC		 452static inline void release_mc(struct kref *kref)
453{
454 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
455
456 kfree(mc->multicast.ib);
457 kfree(mc);
458}
459
a396d43a 460static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 461{
a396d43a 462 mutex_lock(&lock);
e51060f0
SH		 463 list_del(&id_priv->list);
464 cma_deref_dev(id_priv->cma_dev);
465 id_priv->cma_dev = NULL;
a396d43a 466 mutex_unlock(&lock);
e51060f0
SH		 467}
468
f4753834
SH		 469static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
470{
471 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
472}
473
474static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
475{
476 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
477}
478
479static inline unsigned short cma_family(struct rdma_id_private *id_priv)
480{
481 return id_priv->id.route.addr.src_addr.ss_family;
482}
483
5c438135 484static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
c8f6a362
SH		 485{
486 struct ib_sa_mcmember_rec rec;
487 int ret = 0;
488
5c438135
SH		 489 if (id_priv->qkey) {
490 if (qkey && id_priv->qkey != qkey)
491 return -EINVAL;
d2ca39f2 492 return 0;
5c438135
SH		 493 }
494
495 if (qkey) {
496 id_priv->qkey = qkey;
497 return 0;
498 }
d2ca39f2
YE		 499
500 switch (id_priv->id.ps) {
c8f6a362 501 case RDMA_PS_UDP:
5c438135 502 case RDMA_PS_IB:
d2ca39f2 503 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 504 break;
505 case RDMA_PS_IPOIB:
d2ca39f2
YE		 506 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
507 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
508 id_priv->id.port_num, &rec.mgid,
509 &rec);
510 if (!ret)
511 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 512 break;
513 default:
514 break;
515 }
516 return ret;
517}
518
680f920a
SH		 519static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
520{
521 dev_addr->dev_type = ARPHRD_INFINIBAND;
522 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
523 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
524}
525
526static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
527{
528 int ret;
529
530 if (addr->sa_family != AF_IB) {
dd5f03be 531 ret = rdma_translate_ip(addr, dev_addr, NULL);
680f920a
SH		 532 } else {
533 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
534 ret = 0;
535 }
536
537 return ret;
538}
539
7c11147d 540static inline int cma_validate_port(struct ib_device *device, u8 port,
045959db 541 enum ib_gid_type gid_type,
abae1b71
MB		 542 union ib_gid *gid, int dev_type,
543 int bound_if_index)
7c11147d 544{
7c11147d 545 int ret = -ENODEV;
abae1b71 546 struct net_device *ndev = NULL;
7c11147d
MW		 547
548 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
549 return ret;
550
551 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
552 return ret;
553
64936773 554 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
abae1b71 555 ndev = dev_get_by_index(&init_net, bound_if_index);
20029832
MB		 556 if (ndev && ndev->flags & IFF_LOOPBACK) {
557 pr_info("detected loopback device\n");
558 dev_put(ndev);
abae1b71 559
20029832
MB		 560 if (!device->get_netdev)
561 return -EOPNOTSUPP;
562
563 ndev = device->get_netdev(device, port);
564 if (!ndev)
565 return -ENODEV;
566 }
045959db
MB		 567 } else {
568 gid_type = IB_GID_TYPE_IB;
20029832 569 }
abae1b71 570
045959db 571 ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
b39ffa1d 572 ndev, NULL);
abae1b71
MB		 573
574 if (ndev)
575 dev_put(ndev);
7c11147d
MW		 576
577 return ret;
578}
579
be9130cc
DL		 580static int cma_acquire_dev(struct rdma_id_private *id_priv,
581 struct rdma_id_private *listen_id_priv)
e51060f0 582{
c8f6a362 583 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 584 struct cma_device *cma_dev;
7c11147d 585 union ib_gid gid, iboe_gid, *gidp;
e51060f0 586 int ret = -ENODEV;
7c11147d 587 u8 port;
e51060f0 588
7c11147d 589 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
2efdd6a0
MS		 590 id_priv->id.ps == RDMA_PS_IPOIB)
591 return -EINVAL;
592
a396d43a 593 mutex_lock(&lock);
7b85627b
MS		 594 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
595 &iboe_gid);
596
3c86aa70
EC		 597 memcpy(&gid, dev_addr->src_dev_addr +
598 rdma_addr_gid_offset(dev_addr), sizeof gid);
7c11147d
MW		 599
600 if (listen_id_priv) {
be9130cc
DL		 601 cma_dev = listen_id_priv->cma_dev;
602 port = listen_id_priv->id.port_num;
5d9fb044 603 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d 604 &iboe_gid : &gid;
be9130cc 605
045959db
MB		 606 ret = cma_validate_port(cma_dev->device, port,
607 rdma_protocol_ib(cma_dev->device, port) ?
608 IB_GID_TYPE_IB :
609 listen_id_priv->gid_type, gidp,
abae1b71
MB		 610 dev_addr->dev_type,
611 dev_addr->bound_dev_if);
7c11147d
MW		 612 if (!ret) {
613 id_priv->id.port_num = port;
be9130cc
DL		 614 goto out;
615 }
616 }
7c11147d 617
e51060f0 618 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70 619 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
be9130cc
DL		 620 if (listen_id_priv &&
621 listen_id_priv->cma_dev == cma_dev &&
622 listen_id_priv->id.port_num == port)
623 continue;
7c11147d 624
5d9fb044 625 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d
MW		 626 &iboe_gid : &gid;
627
045959db
MB		 628 ret = cma_validate_port(cma_dev->device, port,
629 rdma_protocol_ib(cma_dev->device, port) ?
630 IB_GID_TYPE_IB :
631 cma_dev->default_gid_type[port - 1],
632 gidp, dev_addr->dev_type,
abae1b71 633 dev_addr->bound_dev_if);
7c11147d
MW		 634 if (!ret) {
635 id_priv->id.port_num = port;
636 goto out;
3c86aa70 637 }
e51060f0
SH		 638 }
639 }
3c86aa70
EC		 640
641out:
642 if (!ret)
643 cma_attach_to_dev(id_priv, cma_dev);
644
a396d43a 645 mutex_unlock(&lock);
e51060f0
SH		 646 return ret;
647}
648
f17df3b0
SH		 649/*
650 * Select the source IB device and address to reach the destination IB address.
651 */
652static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
653{
654 struct cma_device *cma_dev, *cur_dev;
655 struct sockaddr_ib *addr;
656 union ib_gid gid, sgid, *dgid;
657 u16 pkey, index;
8fb488d7 658 u8 p;
f17df3b0
SH		 659 int i;
660
661 cma_dev = NULL;
662 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
663 dgid = (union ib_gid *) &addr->sib_addr;
664 pkey = ntohs(addr->sib_pkey);
665
666 list_for_each_entry(cur_dev, &dev_list, list) {
f17df3b0 667 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
30a74ef4 668 if (!rdma_cap_af_ib(cur_dev->device, p))
fef60902
MW		 669 continue;
670
f17df3b0
SH		 671 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
672 continue;
673
55ee3ab2
MB		 674 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
675 &gid, NULL);
676 i++) {
f17df3b0
SH		 677 if (!memcmp(&gid, dgid, sizeof(gid))) {
678 cma_dev = cur_dev;
679 sgid = gid;
8fb488d7 680 id_priv->id.port_num = p;
f17df3b0
SH		 681 goto found;
682 }
683
684 if (!cma_dev && (gid.global.subnet_prefix ==
685 dgid->global.subnet_prefix)) {
686 cma_dev = cur_dev;
687 sgid = gid;
8fb488d7 688 id_priv->id.port_num = p;
f17df3b0
SH		 689 }
690 }
691 }
692 }
693
694 if (!cma_dev)
695 return -ENODEV;
696
697found:
698 cma_attach_to_dev(id_priv, cma_dev);
f17df3b0
SH		 699 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
700 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
701 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
702 return 0;
703}
704
e51060f0
SH		 705static void cma_deref_id(struct rdma_id_private *id_priv)
706{
707 if (atomic_dec_and_test(&id_priv->refcount))
708 complete(&id_priv->comp);
709}
710
de910bd9 711static int cma_disable_callback(struct rdma_id_private *id_priv,
550e5ca7 712 enum rdma_cm_state state)
8aa08602 713{
de910bd9
OG		 714 mutex_lock(&id_priv->handler_mutex);
715 if (id_priv->state != state) {
716 mutex_unlock(&id_priv->handler_mutex);
717 return -EINVAL;
718 }
719 return 0;
e51060f0
SH		 720}
721
fa20105e
GS		 722struct rdma_cm_id *rdma_create_id(struct net *net,
723 rdma_cm_event_handler event_handler,
b26f9b99
SH		 724 void *context, enum rdma_port_space ps,
725 enum ib_qp_type qp_type)
e51060f0
SH		 726{
727 struct rdma_id_private *id_priv;
728
729 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
730 if (!id_priv)
731 return ERR_PTR(-ENOMEM);
732
83e9502d 733 id_priv->owner = task_pid_nr(current);
550e5ca7 734 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 735 id_priv->id.context = context;
736 id_priv->id.event_handler = event_handler;
737 id_priv->id.ps = ps;
b26f9b99 738 id_priv->id.qp_type = qp_type;
e51060f0 739 spin_lock_init(&id_priv->lock);
c5483388 740 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 741 init_completion(&id_priv->comp);
742 atomic_set(&id_priv->refcount, 1);
de910bd9 743 mutex_init(&id_priv->handler_mutex);
e51060f0 744 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 745 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0 746 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
fa20105e 747 id_priv->id.route.addr.dev_addr.net = get_net(net);
e51060f0
SH		 748
749 return &id_priv->id;
750}
751EXPORT_SYMBOL(rdma_create_id);
752
c8f6a362 753static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 754{
755 struct ib_qp_attr qp_attr;
c8f6a362 756 int qp_attr_mask, ret;
e51060f0 757
c8f6a362
SH		 758 qp_attr.qp_state = IB_QPS_INIT;
759 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 760 if (ret)
761 return ret;
762
c8f6a362
SH		 763 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
764 if (ret)
765 return ret;
766
767 qp_attr.qp_state = IB_QPS_RTR;
768 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
769 if (ret)
770 return ret;
771
772 qp_attr.qp_state = IB_QPS_RTS;
773 qp_attr.sq_psn = 0;
774 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
775
776 return ret;
e51060f0
SH		 777}
778
c8f6a362 779static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 780{
781 struct ib_qp_attr qp_attr;
c8f6a362 782 int qp_attr_mask, ret;
07ebafba
TT		 783
784 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 785 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
786 if (ret)
787 return ret;
07ebafba 788
c8f6a362 789 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 790}
791
e51060f0
SH		 792int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
793 struct ib_qp_init_attr *qp_init_attr)
794{
795 struct rdma_id_private *id_priv;
796 struct ib_qp *qp;
797 int ret;
798
799 id_priv = container_of(id, struct rdma_id_private, id);
800 if (id->device != pd->device)
801 return -EINVAL;
802
0691a286 803 qp_init_attr->port_num = id->port_num;
e51060f0
SH		 804 qp = ib_create_qp(pd, qp_init_attr);
805 if (IS_ERR(qp))
806 return PTR_ERR(qp);
807
b26f9b99 808 if (id->qp_type == IB_QPT_UD)
c8f6a362
SH		 809 ret = cma_init_ud_qp(id_priv, qp);
810 else
811 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 812 if (ret)
813 goto err;
814
815 id->qp = qp;
816 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 817 id_priv->srq = (qp->srq != NULL);
818 return 0;
819err:
820 ib_destroy_qp(qp);
821 return ret;
822}
823EXPORT_SYMBOL(rdma_create_qp);
824
825void rdma_destroy_qp(struct rdma_cm_id *id)
826{
c5483388
SH		 827 struct rdma_id_private *id_priv;
828
829 id_priv = container_of(id, struct rdma_id_private, id);
830 mutex_lock(&id_priv->qp_mutex);
831 ib_destroy_qp(id_priv->id.qp);
832 id_priv->id.qp = NULL;
833 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 834}
835EXPORT_SYMBOL(rdma_destroy_qp);
836
5851bb89
SH		 837static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
838 struct rdma_conn_param *conn_param)
e51060f0
SH		 839{
840 struct ib_qp_attr qp_attr;
841 int qp_attr_mask, ret;
dd5f03be 842 union ib_gid sgid;
e51060f0 843
c5483388
SH		 844 mutex_lock(&id_priv->qp_mutex);
845 if (!id_priv->id.qp) {
846 ret = 0;
847 goto out;
848 }
e51060f0
SH		 849
850 /* Need to update QP attributes from default values. */
851 qp_attr.qp_state = IB_QPS_INIT;
c5483388 852 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 853 if (ret)
c5483388 854 goto out;
e51060f0 855
c5483388 856 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 857 if (ret)
c5483388 858 goto out;
e51060f0
SH		 859
860 qp_attr.qp_state = IB_QPS_RTR;
c5483388 861 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 862 if (ret)
c5483388 863 goto out;
e51060f0 864
dd5f03be 865 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
55ee3ab2 866 qp_attr.ah_attr.grh.sgid_index, &sgid, NULL);
dd5f03be
MB		 867 if (ret)
868 goto out;
869
fef60902
MW		 870 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
871
5851bb89
SH		 872 if (conn_param)
873 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 874 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
875out:
876 mutex_unlock(&id_priv->qp_mutex);
877 return ret;
e51060f0
SH		 878}
879
5851bb89
SH		 880static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
881 struct rdma_conn_param *conn_param)
e51060f0
SH		 882{
883 struct ib_qp_attr qp_attr;
884 int qp_attr_mask, ret;
885
c5483388
SH		 886 mutex_lock(&id_priv->qp_mutex);
887 if (!id_priv->id.qp) {
888 ret = 0;
889 goto out;
890 }
e51060f0
SH		 891
892 qp_attr.qp_state = IB_QPS_RTS;
c5483388 893 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 894 if (ret)
c5483388 895 goto out;
e51060f0 896
5851bb89
SH		 897 if (conn_param)
898 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 899 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
900out:
901 mutex_unlock(&id_priv->qp_mutex);
902 return ret;
e51060f0
SH		 903}
904
c5483388 905static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 906{
907 struct ib_qp_attr qp_attr;
c5483388 908 int ret;
e51060f0 909
c5483388
SH		 910 mutex_lock(&id_priv->qp_mutex);
911 if (!id_priv->id.qp) {
912 ret = 0;
913 goto out;
914 }
e51060f0
SH		 915
916 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 917 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
918out:
919 mutex_unlock(&id_priv->qp_mutex);
920 return ret;
e51060f0
SH		 921}
922
c8f6a362
SH		 923static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
924 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
925{
926 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
927 int ret;
3c86aa70
EC		 928 u16 pkey;
929
227128fc 930 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
3c86aa70 931 pkey = 0xffff;
fef60902
MW		 932 else
933 pkey = ib_addr_get_pkey(dev_addr);
c8f6a362
SH		 934
935 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 936 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 937 if (ret)
938 return ret;
939
940 qp_attr->port_num = id_priv->id.port_num;
941 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
942
b26f9b99 943 if (id_priv->id.qp_type == IB_QPT_UD) {
5c438135 944 ret = cma_set_qkey(id_priv, 0);
d2ca39f2
YE		 945 if (ret)
946 return ret;
947
c8f6a362
SH		 948 qp_attr->qkey = id_priv->qkey;
949 *qp_attr_mask |= IB_QP_QKEY;
950 } else {
951 qp_attr->qp_access_flags = 0;
952 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
953 }
954 return 0;
955}
956
e51060f0
SH		 957int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
958 int *qp_attr_mask)
959{
960 struct rdma_id_private *id_priv;
c8f6a362 961 int ret = 0;
e51060f0
SH		 962
963 id_priv = container_of(id, struct rdma_id_private, id);
72219cea 964 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 965 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 966 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
967 else
968 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
969 qp_attr_mask);
dd5f03be 970
e51060f0
SH		 971 if (qp_attr->qp_state == IB_QPS_RTR)
972 qp_attr->rq_psn = id_priv->seq_num;
04215330 973 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
c8f6a362 974 if (!id_priv->cm_id.iw) {
8f076531 975 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 976 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
977 } else
978 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
979 qp_attr_mask);
21655afc 980 } else
e51060f0 981 ret = -ENOSYS;
e51060f0
SH		 982
983 return ret;
984}
985EXPORT_SYMBOL(rdma_init_qp_attr);
986
987static inline int cma_zero_addr(struct sockaddr *addr)
988{
2e2d190c
SH		 989 switch (addr->sa_family) {
990 case AF_INET:
991 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
992 case AF_INET6:
993 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
994 case AF_IB:
995 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
996 default:
997 return 0;
e51060f0
SH		 998 }
999}
1000
1001static inline int cma_loopback_addr(struct sockaddr *addr)
1002{
2e2d190c
SH		 1003 switch (addr->sa_family) {
1004 case AF_INET:
1005 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1006 case AF_INET6:
1007 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1008 case AF_IB:
1009 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1010 default:
1011 return 0;
1012 }
e51060f0
SH		 1013}
1014
1015static inline int cma_any_addr(struct sockaddr *addr)
1016{
1017 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1018}
1019
43b752da
HS		 1020static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1021{
1022 if (src->sa_family != dst->sa_family)
1023 return -1;
1024
1025 switch (src->sa_family) {
1026 case AF_INET:
1027 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1028 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2e2d190c 1029 case AF_INET6:
43b752da
HS		 1030 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1031 &((struct sockaddr_in6 *) dst)->sin6_addr);
2e2d190c
SH		 1032 default:
1033 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1034 &((struct sockaddr_ib *) dst)->sib_addr);
43b752da
HS		 1035 }
1036}
1037
58afdcb7 1038static __be16 cma_port(struct sockaddr *addr)
628e5f6d 1039{
58afdcb7
SH		 1040 struct sockaddr_ib *sib;
1041
1042 switch (addr->sa_family) {
1043 case AF_INET:
628e5f6d 1044 return ((struct sockaddr_in *) addr)->sin_port;
58afdcb7 1045 case AF_INET6:
628e5f6d 1046 return ((struct sockaddr_in6 *) addr)->sin6_port;
58afdcb7
SH		 1047 case AF_IB:
1048 sib = (struct sockaddr_ib *) addr;
1049 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1050 be64_to_cpu(sib->sib_sid_mask)));
1051 default:
1052 return 0;
1053 }
628e5f6d
SH		 1054}
1055
e51060f0
SH		 1056static inline int cma_any_port(struct sockaddr *addr)
1057{
628e5f6d 1058 return !cma_port(addr);
e51060f0
SH		 1059}
1060
0c505f70
HE		 1061static void cma_save_ib_info(struct sockaddr *src_addr,
1062 struct sockaddr *dst_addr,
1063 struct rdma_cm_id *listen_id,
fbaa1a6d 1064 struct ib_sa_path_rec *path)
e51060f0 1065{
fbaa1a6d
SH		 1066 struct sockaddr_ib *listen_ib, *ib;
1067
1068 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
0c505f70
HE		 1069 if (src_addr) {
1070 ib = (struct sockaddr_ib *)src_addr;
1071 ib->sib_family = AF_IB;
1072 if (path) {
1073 ib->sib_pkey = path->pkey;
1074 ib->sib_flowinfo = path->flow_label;
1075 memcpy(&ib->sib_addr, &path->sgid, 16);
1076 ib->sib_sid = path->service_id;
1077 ib->sib_scope_id = 0;
1078 } else {
1079 ib->sib_pkey = listen_ib->sib_pkey;
1080 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1081 ib->sib_addr = listen_ib->sib_addr;
1082 ib->sib_sid = listen_ib->sib_sid;
1083 ib->sib_scope_id = listen_ib->sib_scope_id;
1084 }
1085 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
c07678bb 1086 }
0c505f70
HE		 1087 if (dst_addr) {
1088 ib = (struct sockaddr_ib *)dst_addr;
1089 ib->sib_family = AF_IB;
1090 if (path) {
1091 ib->sib_pkey = path->pkey;
1092 ib->sib_flowinfo = path->flow_label;
1093 memcpy(&ib->sib_addr, &path->dgid, 16);
1094 }
c07678bb 1095 }
fbaa1a6d 1096}
e51060f0 1097
0c505f70
HE		 1098static void cma_save_ip4_info(struct sockaddr *src_addr,
1099 struct sockaddr *dst_addr,
1100 struct cma_hdr *hdr,
1101 __be16 local_port)
fbaa1a6d 1102{
28521440 1103 struct sockaddr_in *ip4;
e51060f0 1104
0c505f70
HE		 1105 if (src_addr) {
1106 ip4 = (struct sockaddr_in *)src_addr;
1107 ip4->sin_family = AF_INET;
1108 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
1109 ip4->sin_port = local_port;
1110 }
fbaa1a6d 1111
0c505f70
HE		 1112 if (dst_addr) {
1113 ip4 = (struct sockaddr_in *)dst_addr;
1114 ip4->sin_family = AF_INET;
1115 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
1116 ip4->sin_port = hdr->port;
1117 }
e51060f0
SH		 1118}
1119
0c505f70
HE		 1120static void cma_save_ip6_info(struct sockaddr *src_addr,
1121 struct sockaddr *dst_addr,
1122 struct cma_hdr *hdr,
1123 __be16 local_port)
e51060f0 1124{
28521440 1125 struct sockaddr_in6 *ip6;
e51060f0 1126
0c505f70
HE		 1127 if (src_addr) {
1128 ip6 = (struct sockaddr_in6 *)src_addr;
1129 ip6->sin6_family = AF_INET6;
1130 ip6->sin6_addr = hdr->dst_addr.ip6;
1131 ip6->sin6_port = local_port;
1132 }
fbaa1a6d 1133
0c505f70
HE		 1134 if (dst_addr) {
1135 ip6 = (struct sockaddr_in6 *)dst_addr;
1136 ip6->sin6_family = AF_INET6;
1137 ip6->sin6_addr = hdr->src_addr.ip6;
1138 ip6->sin6_port = hdr->port;
1139 }
fbaa1a6d
SH		 1140}
1141
0c505f70 1142static u16 cma_port_from_service_id(__be64 service_id)
fbaa1a6d 1143{
0c505f70
HE		 1144 return (u16)be64_to_cpu(service_id);
1145}
fbaa1a6d 1146
0c505f70
HE		 1147static int cma_save_ip_info(struct sockaddr *src_addr,
1148 struct sockaddr *dst_addr,
1149 struct ib_cm_event *ib_event,
1150 __be64 service_id)
1151{
1152 struct cma_hdr *hdr;
1153 __be16 port;
fbaa1a6d
SH		 1154
1155 hdr = ib_event->private_data;
1156 if (hdr->cma_version != CMA_VERSION)
1157 return -EINVAL;
1158
0c505f70
HE		 1159 port = htons(cma_port_from_service_id(service_id));
1160
fbaa1a6d 1161 switch (cma_get_ip_ver(hdr)) {
e51060f0 1162 case 4:
0c505f70 1163 cma_save_ip4_info(src_addr, dst_addr, hdr, port);
e51060f0
SH		 1164 break;
1165 case 6:
0c505f70 1166 cma_save_ip6_info(src_addr, dst_addr, hdr, port);
e51060f0
SH		 1167 break;
1168 default:
4c21b5bc 1169 return -EAFNOSUPPORT;
e51060f0 1170 }
0c505f70 1171
fbaa1a6d 1172 return 0;
e51060f0
SH		 1173}
1174
0c505f70
HE		 1175static int cma_save_net_info(struct sockaddr *src_addr,
1176 struct sockaddr *dst_addr,
1177 struct rdma_cm_id *listen_id,
1178 struct ib_cm_event *ib_event,
1179 sa_family_t sa_family, __be64 service_id)
1180{
1181 if (sa_family == AF_IB) {
1182 if (ib_event->event == IB_CM_REQ_RECEIVED)
1183 cma_save_ib_info(src_addr, dst_addr, listen_id,
1184 ib_event->param.req_rcvd.primary_path);
1185 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1186 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1187 return 0;
1188 }
1189
1190 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1191}
1192
4c21b5bc
HE		 1193static int cma_save_req_info(const struct ib_cm_event *ib_event,
1194 struct cma_req_info *req)
1195{
1196 const struct ib_cm_req_event_param *req_param =
1197 &ib_event->param.req_rcvd;
1198 const struct ib_cm_sidr_req_event_param *sidr_param =
1199 &ib_event->param.sidr_req_rcvd;
1200
1201 switch (ib_event->event) {
1202 case IB_CM_REQ_RECEIVED:
1203 req->device = req_param->listen_id->device;
1204 req->port = req_param->port;
1205 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1206 sizeof(req->local_gid));
1207 req->has_gid = true;
1208 req->service_id = req_param->primary_path->service_id;
ab3964ad 1209 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
84424a7f
HE		 1210 if (req->pkey != req_param->bth_pkey)
1211 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1212 "RDMA CMA: in the future this may cause the request to be dropped\n",
1213 req_param->bth_pkey, req->pkey);
4c21b5bc
HE		 1214 break;
1215 case IB_CM_SIDR_REQ_RECEIVED:
1216 req->device = sidr_param->listen_id->device;
1217 req->port = sidr_param->port;
1218 req->has_gid = false;
1219 req->service_id = sidr_param->service_id;
ab3964ad 1220 req->pkey = sidr_param->pkey;
84424a7f
HE		 1221 if (req->pkey != sidr_param->bth_pkey)
1222 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1223 "RDMA CMA: in the future this may cause the request to be dropped\n",
1224 sidr_param->bth_pkey, req->pkey);
4c21b5bc
HE		 1225 break;
1226 default:
1227 return -EINVAL;
1228 }
1229
1230 return 0;
1231}
1232
f887f2ac
HE		 1233static bool validate_ipv4_net_dev(struct net_device *net_dev,
1234 const struct sockaddr_in *dst_addr,
1235 const struct sockaddr_in *src_addr)
1236{
1237 __be32 daddr = dst_addr->sin_addr.s_addr,
1238 saddr = src_addr->sin_addr.s_addr;
1239 struct fib_result res;
1240 struct flowi4 fl4;
1241 int err;
1242 bool ret;
1243
1244 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1245 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1246 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1247 ipv4_is_loopback(saddr))
1248 return false;
1249
1250 memset(&fl4, 0, sizeof(fl4));
1251 fl4.flowi4_iif = net_dev->ifindex;
1252 fl4.daddr = daddr;
1253 fl4.saddr = saddr;
1254
1255 rcu_read_lock();
1256 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
d3632493 1257 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
f887f2ac
HE		 1258 rcu_read_unlock();
1259
1260 return ret;
1261}
1262
1263static bool validate_ipv6_net_dev(struct net_device *net_dev,
1264 const struct sockaddr_in6 *dst_addr,
1265 const struct sockaddr_in6 *src_addr)
1266{
1267#if IS_ENABLED(CONFIG_IPV6)
1268 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1269 IPV6_ADDR_LINKLOCAL;
1270 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1271 &src_addr->sin6_addr, net_dev->ifindex,
1272 strict);
1273 bool ret;
1274
1275 if (!rt)
1276 return false;
1277
1278 ret = rt->rt6i_idev->dev == net_dev;
1279 ip6_rt_put(rt);
1280
1281 return ret;
1282#else
1283 return false;
1284#endif
1285}
1286
1287static bool validate_net_dev(struct net_device *net_dev,
1288 const struct sockaddr *daddr,
1289 const struct sockaddr *saddr)
1290{
1291 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1292 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1293 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1294 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1295
1296 switch (daddr->sa_family) {
1297 case AF_INET:
1298 return saddr->sa_family == AF_INET &&
1299 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1300
1301 case AF_INET6:
1302 return saddr->sa_family == AF_INET6 &&
1303 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1304
1305 default:
1306 return false;
1307 }
1308}
1309
4c21b5bc
HE		 1310static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1311 const struct cma_req_info *req)
1312{
f887f2ac
HE		 1313 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1314 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1315 *src_addr = (struct sockaddr *)&src_addr_storage;
4c21b5bc
HE		 1316 struct net_device *net_dev;
1317 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1318 int err;
1319
f887f2ac
HE		 1320 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1321 req->service_id);
4c21b5bc
HE		 1322 if (err)
1323 return ERR_PTR(err);
1324
1325 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1326 gid, listen_addr);
1327 if (!net_dev)
1328 return ERR_PTR(-ENODEV);
1329
f887f2ac
HE		 1330 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1331 dev_put(net_dev);
1332 return ERR_PTR(-EHOSTUNREACH);
1333 }
1334
4c21b5bc
HE		 1335 return net_dev;
1336}
1337
1338static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1339{
1340 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1341}
1342
1343static bool cma_match_private_data(struct rdma_id_private *id_priv,
1344 const struct cma_hdr *hdr)
1345{
1346 struct sockaddr *addr = cma_src_addr(id_priv);
1347 __be32 ip4_addr;
1348 struct in6_addr ip6_addr;
1349
1350 if (cma_any_addr(addr) && !id_priv->afonly)
1351 return true;
1352
1353 switch (addr->sa_family) {
1354 case AF_INET:
1355 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1356 if (cma_get_ip_ver(hdr) != 4)
1357 return false;
1358 if (!cma_any_addr(addr) &&
1359 hdr->dst_addr.ip4.addr != ip4_addr)
1360 return false;
1361 break;
1362 case AF_INET6:
1363 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1364 if (cma_get_ip_ver(hdr) != 6)
1365 return false;
1366 if (!cma_any_addr(addr) &&
1367 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1368 return false;
1369 break;
1370 case AF_IB:
1371 return true;
1372 default:
1373 return false;
1374 }
1375
1376 return true;
1377}
1378
b8cab5da
HE		 1379static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1380{
1381 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1382 enum rdma_transport_type transport =
1383 rdma_node_get_transport(device->node_type);
1384
1385 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1386}
1387
1388static bool cma_protocol_roce(const struct rdma_cm_id *id)
1389{
1390 struct ib_device *device = id->device;
1391 const int port_num = id->port_num ?: rdma_start_port(device);
1392
1393 return cma_protocol_roce_dev_port(device, port_num);
1394}
1395
fac51590
MB		 1396static bool cma_match_net_dev(const struct rdma_cm_id *id,
1397 const struct net_device *net_dev,
1398 u8 port_num)
4c21b5bc 1399{
fac51590 1400 const struct rdma_addr *addr = &id->route.addr;
4c21b5bc
HE		 1401
1402 if (!net_dev)
b8cab5da 1403 /* This request is an AF_IB request or a RoCE request */
fac51590
MB		 1404 return (!id->port_num || id->port_num == port_num) &&
1405 (addr->src_addr.ss_family == AF_IB ||
1406 cma_protocol_roce_dev_port(id->device, port_num));
4c21b5bc
HE		 1407
1408 return !addr->dev_addr.bound_dev_if ||
fa20105e 1409 (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
4c21b5bc
HE		 1410 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1411}
1412
1413static struct rdma_id_private *cma_find_listener(
1414 const struct rdma_bind_list *bind_list,
1415 const struct ib_cm_id *cm_id,
1416 const struct ib_cm_event *ib_event,
1417 const struct cma_req_info *req,
1418 const struct net_device *net_dev)
1419{
1420 struct rdma_id_private *id_priv, *id_priv_dev;
1421
1422 if (!bind_list)
1423 return ERR_PTR(-EINVAL);
1424
1425 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1426 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1427 if (id_priv->id.device == cm_id->device &&
fac51590 1428 cma_match_net_dev(&id_priv->id, net_dev, req->port))
4c21b5bc
HE		 1429 return id_priv;
1430 list_for_each_entry(id_priv_dev,
1431 &id_priv->listen_list,
1432 listen_list) {
1433 if (id_priv_dev->id.device == cm_id->device &&
fac51590 1434 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
4c21b5bc
HE		 1435 return id_priv_dev;
1436 }
1437 }
1438 }
1439
1440 return ERR_PTR(-EINVAL);
1441}
1442
1443static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
0b3ca768
HE		 1444 struct ib_cm_event *ib_event,
1445 struct net_device **net_dev)
4c21b5bc
HE		 1446{
1447 struct cma_req_info req;
1448 struct rdma_bind_list *bind_list;
1449 struct rdma_id_private *id_priv;
4c21b5bc
HE		 1450 int err;
1451
1452 err = cma_save_req_info(ib_event, &req);
1453 if (err)
1454 return ERR_PTR(err);
1455
0b3ca768
HE		 1456 *net_dev = cma_get_net_dev(ib_event, &req);
1457 if (IS_ERR(*net_dev)) {
1458 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
4c21b5bc 1459 /* Assuming the protocol is AF_IB */
0b3ca768 1460 *net_dev = NULL;
b8cab5da
HE		 1461 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1462 /* TODO find the net dev matching the request parameters
1463 * through the RoCE GID table */
1464 *net_dev = NULL;
4c21b5bc 1465 } else {
0b3ca768 1466 return ERR_CAST(*net_dev);
4c21b5bc
HE		 1467 }
1468 }
1469
fa20105e 1470 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
4be74b42 1471 rdma_ps_from_service_id(req.service_id),
4c21b5bc 1472 cma_port_from_service_id(req.service_id));
0b3ca768 1473 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
b3b51f9f 1474 if (IS_ERR(id_priv) && *net_dev) {
be688195
HE		 1475 dev_put(*net_dev);
1476 *net_dev = NULL;
1477 }
4c21b5bc
HE		 1478
1479 return id_priv;
1480}
1481
e8160e15 1482static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
e51060f0 1483{
e8160e15 1484 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
e51060f0
SH		 1485}
1486
e51060f0
SH		 1487static void cma_cancel_route(struct rdma_id_private *id_priv)
1488{
fe53ba2f 1489 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
e51060f0
SH		 1490 if (id_priv->query)
1491 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
e51060f0
SH		 1492 }
1493}
1494
e51060f0
SH		 1495static void cma_cancel_listens(struct rdma_id_private *id_priv)
1496{
1497 struct rdma_id_private *dev_id_priv;
1498
d02d1f53
SH		 1499 /*
1500 * Remove from listen_any_list to prevent added devices from spawning
1501 * additional listen requests.
1502 */
e51060f0
SH		 1503 mutex_lock(&lock);
1504 list_del(&id_priv->list);
1505
1506 while (!list_empty(&id_priv->listen_list)) {
1507 dev_id_priv = list_entry(id_priv->listen_list.next,
1508 struct rdma_id_private, listen_list);
d02d1f53
SH		 1509 /* sync with device removal to avoid duplicate destruction */
1510 list_del_init(&dev_id_priv->list);
1511 list_del(&dev_id_priv->listen_list);
1512 mutex_unlock(&lock);
1513
1514 rdma_destroy_id(&dev_id_priv->id);
1515 mutex_lock(&lock);
e51060f0
SH		 1516 }
1517 mutex_unlock(&lock);
1518}
1519
1520static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 1521 enum rdma_cm_state state)
e51060f0
SH		 1522{
1523 switch (state) {
550e5ca7 1524 case RDMA_CM_ADDR_QUERY:
e51060f0
SH		 1525 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1526 break;
550e5ca7 1527 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 1528 cma_cancel_route(id_priv);
1529 break;
550e5ca7 1530 case RDMA_CM_LISTEN:
f4753834 1531 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
e51060f0
SH		 1532 cma_cancel_listens(id_priv);
1533 break;
1534 default:
1535 break;
1536 }
1537}
1538
1539static void cma_release_port(struct rdma_id_private *id_priv)
1540{
1541 struct rdma_bind_list *bind_list = id_priv->bind_list;
fa20105e 1542 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0
SH		 1543
1544 if (!bind_list)
1545 return;
1546
1547 mutex_lock(&lock);
1548 hlist_del(&id_priv->node);
1549 if (hlist_empty(&bind_list->owners)) {
fa20105e 1550 cma_ps_remove(net, bind_list->ps, bind_list->port);
e51060f0
SH		 1551 kfree(bind_list);
1552 }
1553 mutex_unlock(&lock);
1554}
1555
c8f6a362
SH		 1556static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1557{
1558 struct cma_multicast *mc;
1559
1560 while (!list_empty(&id_priv->mc_list)) {
1561 mc = container_of(id_priv->mc_list.next,
1562 struct cma_multicast, list);
1563 list_del(&mc->list);
a31ad3b0 1564 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
5c9a5282 1565 id_priv->id.port_num)) {
3c86aa70
EC		 1566 ib_sa_free_multicast(mc->multicast.ib);
1567 kfree(mc);
bee3c3c9
MS		 1568 } else {
1569 if (mc->igmp_joined) {
1570 struct rdma_dev_addr *dev_addr =
1571 &id_priv->id.route.addr.dev_addr;
1572 struct net_device *ndev = NULL;
1573
1574 if (dev_addr->bound_dev_if)
1575 ndev = dev_get_by_index(&init_net,
1576 dev_addr->bound_dev_if);
1577 if (ndev) {
1578 cma_igmp_send(ndev,
1579 &mc->multicast.ib->rec.mgid,
1580 false);
1581 dev_put(ndev);
1582 }
1583 }
3c86aa70 1584 kref_put(&mc->mcref, release_mc);
bee3c3c9 1585 }
c8f6a362
SH		 1586 }
1587}
1588
e51060f0
SH		 1589void rdma_destroy_id(struct rdma_cm_id *id)
1590{
1591 struct rdma_id_private *id_priv;
550e5ca7 1592 enum rdma_cm_state state;
e51060f0
SH		 1593
1594 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1595 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1596 cma_cancel_operation(id_priv, state);
1597
a396d43a
SH		 1598 /*
1599 * Wait for any active callback to finish. New callbacks will find
1600 * the id_priv state set to destroying and abort.
1601 */
1602 mutex_lock(&id_priv->handler_mutex);
1603 mutex_unlock(&id_priv->handler_mutex);
1604
e51060f0 1605 if (id_priv->cma_dev) {
72219cea 1606 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
0c9361fc 1607 if (id_priv->cm_id.ib)
e51060f0 1608 ib_destroy_cm_id(id_priv->cm_id.ib);
04215330 1609 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
0c9361fc 1610 if (id_priv->cm_id.iw)
07ebafba 1611 iw_destroy_cm_id(id_priv->cm_id.iw);
e51060f0 1612 }
c8f6a362 1613 cma_leave_mc_groups(id_priv);
a396d43a 1614 cma_release_dev(id_priv);
e51060f0
SH		 1615 }
1616
1617 cma_release_port(id_priv);
1618 cma_deref_id(id_priv);
1619 wait_for_completion(&id_priv->comp);
1620
d02d1f53
SH		 1621 if (id_priv->internal_id)
1622 cma_deref_id(id_priv->id.context);
1623
e51060f0 1624 kfree(id_priv->id.route.path_rec);
fa20105e 1625 put_net(id_priv->id.route.addr.dev_addr.net);
e51060f0
SH		 1626 kfree(id_priv);
1627}
1628EXPORT_SYMBOL(rdma_destroy_id);
1629
1630static int cma_rep_recv(struct rdma_id_private *id_priv)
1631{
1632 int ret;
1633
5851bb89 1634 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 1635 if (ret)
1636 goto reject;
1637
5851bb89 1638 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 1639 if (ret)
1640 goto reject;
1641
1642 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1643 if (ret)
1644 goto reject;
1645
1646 return 0;
1647reject:
c5483388 1648 cma_modify_qp_err(id_priv);
e51060f0
SH		 1649 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1650 NULL, 0, NULL, 0);
1651 return ret;
1652}
1653
a1b1b61f
SH		 1654static void cma_set_rep_event_data(struct rdma_cm_event *event,
1655 struct ib_cm_rep_event_param *rep_data,
1656 void *private_data)
1657{
1658 event->param.conn.private_data = private_data;
1659 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1660 event->param.conn.responder_resources = rep_data->responder_resources;
1661 event->param.conn.initiator_depth = rep_data->initiator_depth;
1662 event->param.conn.flow_control = rep_data->flow_control;
1663 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1664 event->param.conn.srq = rep_data->srq;
1665 event->param.conn.qp_num = rep_data->remote_qpn;
1666}
1667
e51060f0
SH		 1668static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1669{
1670 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 1671 struct rdma_cm_event event;
1672 int ret = 0;
e51060f0 1673
38ca83a5 1674 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1675 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
38ca83a5 1676 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1677 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
8aa08602 1678 return 0;
e51060f0 1679
a1b1b61f 1680 memset(&event, 0, sizeof event);
e51060f0
SH		 1681 switch (ib_event->event) {
1682 case IB_CM_REQ_ERROR:
1683 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1684 event.event = RDMA_CM_EVENT_UNREACHABLE;
1685 event.status = -ETIMEDOUT;
e51060f0
SH		 1686 break;
1687 case IB_CM_REP_RECEIVED:
01602f11 1688 if (id_priv->id.qp) {
a1b1b61f
SH		 1689 event.status = cma_rep_recv(id_priv);
1690 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1691 RDMA_CM_EVENT_ESTABLISHED;
01602f11 1692 } else {
a1b1b61f 1693 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
01602f11 1694 }
a1b1b61f
SH		 1695 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1696 ib_event->private_data);
e51060f0
SH		 1697 break;
1698 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1699 case IB_CM_USER_ESTABLISHED:
1700 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1701 break;
1702 case IB_CM_DREQ_ERROR:
a1b1b61f 1703 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1704 case IB_CM_DREQ_RECEIVED:
1705 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 1706 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1707 RDMA_CM_DISCONNECT))
e51060f0 1708 goto out;
a1b1b61f 1709 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1710 break;
1711 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1712 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1713 break;
e51060f0
SH		 1714 case IB_CM_MRA_RECEIVED:
1715 /* ignore event */
1716 goto out;
1717 case IB_CM_REJ_RECEIVED:
c5483388 1718 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1719 event.status = ib_event->param.rej_rcvd.reason;
1720 event.event = RDMA_CM_EVENT_REJECTED;
1721 event.param.conn.private_data = ib_event->private_data;
1722 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1723 break;
1724 default:
aba25a3e 1725 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1726 ib_event->event);
1727 goto out;
1728 }
1729
a1b1b61f 1730 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1731 if (ret) {
1732 /* Destroy the CM ID by returning a non-zero value. */
1733 id_priv->cm_id.ib = NULL;
550e5ca7 1734 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1735 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1736 rdma_destroy_id(&id_priv->id);
1737 return ret;
1738 }
1739out:
de910bd9 1740 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1741 return ret;
1742}
1743
628e5f6d 1744static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
0b3ca768
HE		 1745 struct ib_cm_event *ib_event,
1746 struct net_device *net_dev)
e51060f0
SH		 1747{
1748 struct rdma_id_private *id_priv;
1749 struct rdma_cm_id *id;
1750 struct rdma_route *rt;
0c505f70
HE		 1751 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1752 const __be64 service_id =
1753 ib_event->param.req_rcvd.primary_path->service_id;
64c5e613 1754 int ret;
e51060f0 1755
fa20105e
GS		 1756 id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1757 listen_id->event_handler, listen_id->context,
b26f9b99 1758 listen_id->ps, ib_event->param.req_rcvd.qp_type);
e51060f0 1759 if (IS_ERR(id))
0c9361fc 1760 return NULL;
3f168d2b 1761
f4753834 1762 id_priv = container_of(id, struct rdma_id_private, id);
0c505f70
HE		 1763 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1764 (struct sockaddr *)&id->route.addr.dst_addr,
1765 listen_id, ib_event, ss_family, service_id))
fbaa1a6d 1766 goto err;
e51060f0
SH		 1767
1768 rt = &id->route;
1769 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1770 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1771 GFP_KERNEL);
e51060f0 1772 if (!rt->path_rec)
0c9361fc 1773 goto err;
e51060f0 1774
e51060f0
SH		 1775 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1776 if (rt->num_paths == 2)
1777 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1778
0b3ca768
HE		 1779 if (net_dev) {
1780 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
6f8372b6 1781 if (ret)
0c9361fc 1782 goto err;
0b3ca768 1783 } else {
b8cab5da
HE		 1784 if (!cma_protocol_roce(listen_id) &&
1785 cma_any_addr(cma_src_addr(id_priv))) {
1786 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1787 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1788 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1789 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1790 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1791 if (ret)
1792 goto err;
1793 }
6f8372b6
SH		 1794 }
1795 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0 1796
550e5ca7 1797 id_priv->state = RDMA_CM_CONNECT;
e51060f0 1798 return id_priv;
3f168d2b 1799
3f168d2b 1800err:
0c9361fc 1801 rdma_destroy_id(id);
e51060f0
SH		 1802 return NULL;
1803}
1804
628e5f6d 1805static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
0b3ca768
HE		 1806 struct ib_cm_event *ib_event,
1807 struct net_device *net_dev)
628e5f6d
SH		 1808{
1809 struct rdma_id_private *id_priv;
1810 struct rdma_cm_id *id;
0c505f70 1811 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
fa20105e 1812 struct net *net = listen_id->route.addr.dev_addr.net;
628e5f6d
SH		 1813 int ret;
1814
fa20105e 1815 id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
b26f9b99 1816 listen_id->ps, IB_QPT_UD);
628e5f6d
SH		 1817 if (IS_ERR(id))
1818 return NULL;
1819
f4753834 1820 id_priv = container_of(id, struct rdma_id_private, id);
0c505f70
HE		 1821 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1822 (struct sockaddr *)&id->route.addr.dst_addr,
1823 listen_id, ib_event, ss_family,
1824 ib_event->param.sidr_req_rcvd.service_id))
628e5f6d
SH		 1825 goto err;
1826
0b3ca768
HE		 1827 if (net_dev) {
1828 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
6f8372b6
SH		 1829 if (ret)
1830 goto err;
0b3ca768 1831 } else {
b8cab5da
HE		 1832 if (!cma_any_addr(cma_src_addr(id_priv))) {
1833 ret = cma_translate_addr(cma_src_addr(id_priv),
1834 &id->route.addr.dev_addr);
1835 if (ret)
1836 goto err;
1837 }
6f8372b6 1838 }
628e5f6d 1839
550e5ca7 1840 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 1841 return id_priv;
1842err:
1843 rdma_destroy_id(id);
1844 return NULL;
1845}
1846
a1b1b61f
SH		 1847static void cma_set_req_event_data(struct rdma_cm_event *event,
1848 struct ib_cm_req_event_param *req_data,
1849 void *private_data, int offset)
1850{
1851 event->param.conn.private_data = private_data + offset;
1852 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1853 event->param.conn.responder_resources = req_data->responder_resources;
1854 event->param.conn.initiator_depth = req_data->initiator_depth;
1855 event->param.conn.flow_control = req_data->flow_control;
1856 event->param.conn.retry_count = req_data->retry_count;
1857 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1858 event->param.conn.srq = req_data->srq;
1859 event->param.conn.qp_num = req_data->remote_qpn;
1860}
1861
9595480c
HS		 1862static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1863{
4dd81e89 1864 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 1865 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1866 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1867 (id->qp_type == IB_QPT_UD)) ||
1868 (!id->qp_type));
1869}
1870
e51060f0
SH		 1871static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1872{
1873 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1874 struct rdma_cm_event event;
0b3ca768 1875 struct net_device *net_dev;
e51060f0
SH		 1876 int offset, ret;
1877
0b3ca768 1878 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
4c21b5bc
HE		 1879 if (IS_ERR(listen_id))
1880 return PTR_ERR(listen_id);
1881
0b3ca768
HE		 1882 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1883 ret = -EINVAL;
1884 goto net_dev_put;
1885 }
9595480c 1886
0b3ca768
HE		 1887 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) {
1888 ret = -ECONNABORTED;
1889 goto net_dev_put;
1890 }
e51060f0 1891
628e5f6d 1892 memset(&event, 0, sizeof event);
e8160e15 1893 offset = cma_user_data_offset(listen_id);
628e5f6d 1894 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 1895 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
0b3ca768 1896 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 1897 event.param.ud.private_data = ib_event->private_data + offset;
1898 event.param.ud.private_data_len =
1899 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1900 } else {
0b3ca768 1901 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 1902 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1903 ib_event->private_data, offset);
1904 }
e51060f0
SH		 1905 if (!conn_id) {
1906 ret = -ENOMEM;
b6cec8aa 1907 goto err1;
e51060f0
SH		 1908 }
1909
de910bd9 1910 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
be9130cc 1911 ret = cma_acquire_dev(conn_id, listen_id);
a1a733f6 1912 if (ret)
b6cec8aa 1913 goto err2;
e51060f0
SH		 1914
1915 conn_id->cm_id.ib = cm_id;
1916 cm_id->context = conn_id;
1917 cm_id->cm_handler = cma_ib_handler;
1918
25ae21a1
SH		 1919 /*
1920 * Protect against the user destroying conn_id from another thread
1921 * until we're done accessing it.
1922 */
1923 atomic_inc(&conn_id->refcount);
a1b1b61f 1924 ret = conn_id->id.event_handler(&conn_id->id, &event);
b6cec8aa
SH		 1925 if (ret)
1926 goto err3;
b6cec8aa
SH		 1927 /*
1928 * Acquire mutex to prevent user executing rdma_destroy_id()
1929 * while we're accessing the cm_id.
1930 */
1931 mutex_lock(&lock);
dd5f03be
MB		 1932 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1933 (conn_id->id.qp_type != IB_QPT_UD))
b6cec8aa
SH		 1934 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1935 mutex_unlock(&lock);
1936 mutex_unlock(&conn_id->handler_mutex);
1937 mutex_unlock(&listen_id->handler_mutex);
25ae21a1 1938 cma_deref_id(conn_id);
0b3ca768
HE		 1939 if (net_dev)
1940 dev_put(net_dev);
b6cec8aa 1941 return 0;
a1a733f6 1942
b6cec8aa
SH		 1943err3:
1944 cma_deref_id(conn_id);
a1a733f6
KK		 1945 /* Destroy the CM ID by returning a non-zero value. */
1946 conn_id->cm_id.ib = NULL;
b6cec8aa 1947err2:
550e5ca7 1948 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1949 mutex_unlock(&conn_id->handler_mutex);
b6cec8aa 1950err1:
de910bd9 1951 mutex_unlock(&listen_id->handler_mutex);
b6cec8aa
SH		 1952 if (conn_id)
1953 rdma_destroy_id(&conn_id->id);
0b3ca768
HE		 1954
1955net_dev_put:
1956 if (net_dev)
1957 dev_put(net_dev);
1958
e51060f0
SH		 1959 return ret;
1960}
1961
cf53936f 1962__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
e51060f0 1963{
496ce3ce
SH		 1964 if (addr->sa_family == AF_IB)
1965 return ((struct sockaddr_ib *) addr)->sib_sid;
1966
cf53936f 1967 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0 1968}
cf53936f 1969EXPORT_SYMBOL(rdma_get_service_id);
e51060f0 1970
07ebafba
TT		 1971static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1972{
1973 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1974 struct rdma_cm_event event;
07ebafba 1975 int ret = 0;
24d44a39
SW		 1976 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1977 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba 1978
550e5ca7 1979 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
be65f086 1980 return 0;
07ebafba 1981
be65f086 1982 memset(&event, 0, sizeof event);
07ebafba
TT		 1983 switch (iw_event->event) {
1984 case IW_CM_EVENT_CLOSE:
a1b1b61f 1985 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1986 break;
1987 case IW_CM_EVENT_CONNECT_REPLY:
24d44a39
SW		 1988 memcpy(cma_src_addr(id_priv), laddr,
1989 rdma_addr_size(laddr));
1990 memcpy(cma_dst_addr(id_priv), raddr,
1991 rdma_addr_size(raddr));
881a045f
SW		 1992 switch (iw_event->status) {
1993 case 0:
a1b1b61f 1994 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1995 event.param.conn.initiator_depth = iw_event->ird;
1996 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 1997 break;
1998 case -ECONNRESET:
1999 case -ECONNREFUSED:
2000 event.event = RDMA_CM_EVENT_REJECTED;
2001 break;
2002 case -ETIMEDOUT:
2003 event.event = RDMA_CM_EVENT_UNREACHABLE;
2004 break;
2005 default:
2006 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2007 break;
2008 }
07ebafba
TT		 2009 break;
2010 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 2011 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 2012 event.param.conn.initiator_depth = iw_event->ird;
2013 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 2014 break;
2015 default:
2016 BUG_ON(1);
2017 }
2018
a1b1b61f
SH		 2019 event.status = iw_event->status;
2020 event.param.conn.private_data = iw_event->private_data;
2021 event.param.conn.private_data_len = iw_event->private_data_len;
2022 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 2023 if (ret) {
2024 /* Destroy the CM ID by returning a non-zero value. */
2025 id_priv->cm_id.iw = NULL;
550e5ca7 2026 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2027 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 2028 rdma_destroy_id(&id_priv->id);
2029 return ret;
2030 }
2031
de910bd9 2032 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 2033 return ret;
2034}
2035
2036static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2037 struct iw_cm_event *iw_event)
2038{
2039 struct rdma_cm_id *new_cm_id;
2040 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 2041 struct rdma_cm_event event;
07ebafba 2042 int ret;
24d44a39
SW		 2043 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2044 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba
TT		 2045
2046 listen_id = cm_id->context;
550e5ca7 2047 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 2048 return -ECONNABORTED;
07ebafba
TT		 2049
2050 /* Create a new RDMA id for the new IW CM ID */
fa20105e
GS		 2051 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2052 listen_id->id.event_handler,
07ebafba 2053 listen_id->id.context,
b26f9b99 2054 RDMA_PS_TCP, IB_QPT_RC);
10f32065 2055 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 2056 ret = -ENOMEM;
2057 goto out;
2058 }
2059 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 2060 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 2061 conn_id->state = RDMA_CM_CONNECT;
07ebafba 2062
dd5f03be 2063 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
07ebafba 2064 if (ret) {
de910bd9 2065 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 2066 rdma_destroy_id(new_cm_id);
2067 goto out;
2068 }
2069
be9130cc 2070 ret = cma_acquire_dev(conn_id, listen_id);
07ebafba 2071 if (ret) {
de910bd9 2072 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 2073 rdma_destroy_id(new_cm_id);
2074 goto out;
2075 }
2076
2077 conn_id->cm_id.iw = cm_id;
2078 cm_id->context = conn_id;
2079 cm_id->cm_handler = cma_iw_handler;
2080
24d44a39
SW		 2081 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2082 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
07ebafba 2083
a1b1b61f
SH		 2084 memset(&event, 0, sizeof event);
2085 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2086 event.param.conn.private_data = iw_event->private_data;
2087 event.param.conn.private_data_len = iw_event->private_data_len;
3ebeebc3
KS		 2088 event.param.conn.initiator_depth = iw_event->ird;
2089 event.param.conn.responder_resources = iw_event->ord;
25ae21a1
SH		 2090
2091 /*
2092 * Protect against the user destroying conn_id from another thread
2093 * until we're done accessing it.
2094 */
2095 atomic_inc(&conn_id->refcount);
a1b1b61f 2096 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 2097 if (ret) {
2098 /* User wants to destroy the CM ID */
2099 conn_id->cm_id.iw = NULL;
550e5ca7 2100 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 2101 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 2102 cma_deref_id(conn_id);
07ebafba 2103 rdma_destroy_id(&conn_id->id);
de910bd9 2104 goto out;
07ebafba
TT		 2105 }
2106
de910bd9 2107 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 2108 cma_deref_id(conn_id);
de910bd9 2109
07ebafba 2110out:
de910bd9 2111 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 2112 return ret;
2113}
2114
e51060f0
SH		 2115static int cma_ib_listen(struct rdma_id_private *id_priv)
2116{
e51060f0 2117 struct sockaddr *addr;
0c9361fc 2118 struct ib_cm_id *id;
e51060f0 2119 __be64 svc_id;
e51060f0 2120
51efe394
HE		 2121 addr = cma_src_addr(id_priv);
2122 svc_id = rdma_get_service_id(&id_priv->id, addr);
2123 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
0c9361fc
JM		 2124 if (IS_ERR(id))
2125 return PTR_ERR(id);
0c9361fc 2126 id_priv->cm_id.ib = id;
e51060f0 2127
51efe394 2128 return 0;
e51060f0
SH		 2129}
2130
07ebafba
TT		 2131static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2132{
2133 int ret;
0c9361fc
JM		 2134 struct iw_cm_id *id;
2135
2136 id = iw_create_cm_id(id_priv->id.device,
2137 iw_conn_req_handler,
2138 id_priv);
2139 if (IS_ERR(id))
2140 return PTR_ERR(id);
07ebafba 2141
68cdba06 2142 id->tos = id_priv->tos;
0c9361fc 2143 id_priv->cm_id.iw = id;
07ebafba 2144
24d44a39
SW		 2145 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2146 rdma_addr_size(cma_src_addr(id_priv)));
07ebafba
TT		 2147
2148 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2149
2150 if (ret) {
2151 iw_destroy_cm_id(id_priv->cm_id.iw);
2152 id_priv->cm_id.iw = NULL;
2153 }
2154
2155 return ret;
2156}
2157
e51060f0
SH		 2158static int cma_listen_handler(struct rdma_cm_id *id,
2159 struct rdma_cm_event *event)
2160{
2161 struct rdma_id_private *id_priv = id->context;
2162
2163 id->context = id_priv->id.context;
2164 id->event_handler = id_priv->id.event_handler;
2165 return id_priv->id.event_handler(id, event);
2166}
2167
2168static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2169 struct cma_device *cma_dev)
2170{
2171 struct rdma_id_private *dev_id_priv;
2172 struct rdma_cm_id *id;
fa20105e 2173 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0
SH		 2174 int ret;
2175
72219cea 2176 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
94d0c939
SH		 2177 return;
2178
fa20105e 2179 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
b26f9b99 2180 id_priv->id.qp_type);
e51060f0
SH		 2181 if (IS_ERR(id))
2182 return;
2183
2184 dev_id_priv = container_of(id, struct rdma_id_private, id);
2185
550e5ca7 2186 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
f4753834
SH		 2187 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2188 rdma_addr_size(cma_src_addr(id_priv)));
e51060f0 2189
045959db 2190 _cma_attach_to_dev(dev_id_priv, cma_dev);
e51060f0 2191 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 2192 atomic_inc(&id_priv->refcount);
2193 dev_id_priv->internal_id = 1;
5b0ec991 2194 dev_id_priv->afonly = id_priv->afonly;
e51060f0
SH		 2195
2196 ret = rdma_listen(id, id_priv->backlog);
2197 if (ret)
aba25a3e
PP		 2198 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2199 ret, cma_dev->device->name);
e51060f0
SH		 2200}
2201
2202static void cma_listen_on_all(struct rdma_id_private *id_priv)
2203{
2204 struct cma_device *cma_dev;
2205
2206 mutex_lock(&lock);
2207 list_add_tail(&id_priv->list, &listen_any_list);
2208 list_for_each_entry(cma_dev, &dev_list, list)
2209 cma_listen_on_dev(id_priv, cma_dev);
2210 mutex_unlock(&lock);
2211}
2212
a81c994d
SH		 2213void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2214{
2215 struct rdma_id_private *id_priv;
2216
2217 id_priv = container_of(id, struct rdma_id_private, id);
2218 id_priv->tos = (u8) tos;
2219}
2220EXPORT_SYMBOL(rdma_set_service_type);
2221
e51060f0
SH		 2222static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2223 void *context)
2224{
2225 struct cma_work *work = context;
2226 struct rdma_route *route;
2227
2228 route = &work->id->id.route;
2229
2230 if (!status) {
2231 route->num_paths = 1;
2232 *route->path_rec = *path_rec;
2233 } else {
550e5ca7
NM		 2234 work->old_state = RDMA_CM_ROUTE_QUERY;
2235 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0 2236 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 2237 work->event.status = status;
e51060f0
SH		 2238 }
2239
2240 queue_work(cma_wq, &work->work);
2241}
2242
2243static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2244 struct cma_work *work)
2245{
f4753834 2246 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 2247 struct ib_sa_path_rec path_rec;
a81c994d
SH		 2248 ib_sa_comp_mask comp_mask;
2249 struct sockaddr_in6 *sin6;
f68194ca 2250 struct sockaddr_ib *sib;
e51060f0
SH		 2251
2252 memset(&path_rec, 0, sizeof path_rec);
f4753834
SH		 2253 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2254 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2255 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
e51060f0 2256 path_rec.numb_path = 1;
962063e6 2257 path_rec.reversible = 1;
cf53936f 2258 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
a81c994d
SH		 2259
2260 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2261 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2262 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2263
f68194ca
SH		 2264 switch (cma_family(id_priv)) {
2265 case AF_INET:
a81c994d
SH		 2266 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2267 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
f68194ca
SH		 2268 break;
2269 case AF_INET6:
f4753834 2270 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
a81c994d
SH		 2271 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2272 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
f68194ca
SH		 2273 break;
2274 case AF_IB:
2275 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2276 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2277 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2278 break;
a81c994d 2279 }
e51060f0 2280
c1a0b23b 2281 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 2282 id_priv->id.port_num, &path_rec,
2283 comp_mask, timeout_ms,
2284 GFP_KERNEL, cma_query_handler,
2285 work, &id_priv->query);
e51060f0
SH		 2286
2287 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2288}
2289
c4028958 2290static void cma_work_handler(struct work_struct *_work)
e51060f0 2291{
c4028958 2292 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 2293 struct rdma_id_private *id_priv = work->id;
2294 int destroy = 0;
2295
de910bd9 2296 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 2297 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2298 goto out;
2299
2300 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 2301 cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 2302 destroy = 1;
2303 }
2304out:
de910bd9 2305 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2306 cma_deref_id(id_priv);
2307 if (destroy)
2308 rdma_destroy_id(&id_priv->id);
2309 kfree(work);
2310}
2311
dd5bdff8
OG		 2312static void cma_ndev_work_handler(struct work_struct *_work)
2313{
2314 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2315 struct rdma_id_private *id_priv = work->id;
2316 int destroy = 0;
2317
2318 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2319 if (id_priv->state == RDMA_CM_DESTROYING ||
2320 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
dd5bdff8
OG		 2321 goto out;
2322
2323 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 2324 cma_exch(id_priv, RDMA_CM_DESTROYING);
dd5bdff8
OG		 2325 destroy = 1;
2326 }
2327
2328out:
2329 mutex_unlock(&id_priv->handler_mutex);
2330 cma_deref_id(id_priv);
2331 if (destroy)
2332 rdma_destroy_id(&id_priv->id);
2333 kfree(work);
2334}
2335
e51060f0
SH		 2336static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2337{
2338 struct rdma_route *route = &id_priv->id.route;
2339 struct cma_work *work;
2340 int ret;
2341
2342 work = kzalloc(sizeof *work, GFP_KERNEL);
2343 if (!work)
2344 return -ENOMEM;
2345
2346 work->id = id_priv;
c4028958 2347 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2348 work->old_state = RDMA_CM_ROUTE_QUERY;
2349 work->new_state = RDMA_CM_ROUTE_RESOLVED;
e51060f0
SH		 2350 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2351
2352 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2353 if (!route->path_rec) {
2354 ret = -ENOMEM;
2355 goto err1;
2356 }
2357
2358 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2359 if (ret)
2360 goto err2;
2361
2362 return 0;
2363err2:
2364 kfree(route->path_rec);
2365 route->path_rec = NULL;
2366err1:
2367 kfree(work);
2368 return ret;
2369}
2370
2371int rdma_set_ib_paths(struct rdma_cm_id *id,
2372 struct ib_sa_path_rec *path_rec, int num_paths)
2373{
2374 struct rdma_id_private *id_priv;
2375 int ret;
2376
2377 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 2378 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2379 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 2380 return -EINVAL;
2381
9893e742
JL		 2382 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2383 GFP_KERNEL);
e51060f0
SH		 2384 if (!id->route.path_rec) {
2385 ret = -ENOMEM;
2386 goto err;
2387 }
2388
ae2d9293 2389 id->route.num_paths = num_paths;
e51060f0
SH		 2390 return 0;
2391err:
550e5ca7 2392 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2393 return ret;
2394}
2395EXPORT_SYMBOL(rdma_set_ib_paths);
2396
07ebafba
TT		 2397static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2398{
2399 struct cma_work *work;
2400
2401 work = kzalloc(sizeof *work, GFP_KERNEL);
2402 if (!work)
2403 return -ENOMEM;
2404
2405 work->id = id_priv;
c4028958 2406 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2407 work->old_state = RDMA_CM_ROUTE_QUERY;
2408 work->new_state = RDMA_CM_ROUTE_RESOLVED;
07ebafba
TT		 2409 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2410 queue_work(cma_wq, &work->work);
2411 return 0;
2412}
2413
eb072c4b
EP		 2414static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2415{
2416 int prio;
2417 struct net_device *dev;
2418
2419 prio = rt_tos2priority(tos);
2420 dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
2421 vlan_dev_real_dev(ndev) : ndev;
2422
2423 if (dev->num_tc)
2424 return netdev_get_prio_tc_map(dev, prio);
2425
2426#if IS_ENABLED(CONFIG_VLAN_8021Q)
2427 if (ndev->priv_flags & IFF_802_1Q_VLAN)
2428 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2429 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2430#endif
2431 return 0;
2432}
2433
3c86aa70
EC		 2434static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2435{
2436 struct rdma_route *route = &id_priv->id.route;
2437 struct rdma_addr *addr = &route->addr;
2438 struct cma_work *work;
2439 int ret;
3c86aa70 2440 struct net_device *ndev = NULL;
dd5f03be 2441
3c86aa70 2442
3c86aa70
EC		 2443 work = kzalloc(sizeof *work, GFP_KERNEL);
2444 if (!work)
2445 return -ENOMEM;
2446
2447 work->id = id_priv;
2448 INIT_WORK(&work->work, cma_work_handler);
2449
2450 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2451 if (!route->path_rec) {
2452 ret = -ENOMEM;
2453 goto err1;
2454 }
2455
2456 route->num_paths = 1;
2457
abae1b71 2458 if (addr->dev_addr.bound_dev_if) {
3c86aa70 2459 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
20029832
MB		 2460 if (!ndev)
2461 return -ENODEV;
2462
2463 if (ndev->flags & IFF_LOOPBACK) {
2464 dev_put(ndev);
2465 if (!id_priv->id.device->get_netdev)
2466 return -EOPNOTSUPP;
2467
2468 ndev = id_priv->id.device->get_netdev(id_priv->id.device,
2469 id_priv->id.port_num);
2470 if (!ndev)
2471 return -ENODEV;
2472 }
2473
abae1b71 2474 route->path_rec->net = &init_net;
20029832 2475 route->path_rec->ifindex = ndev->ifindex;
cb57bb84 2476 route->path_rec->gid_type = id_priv->gid_type;
abae1b71 2477 }
3c86aa70
EC		 2478 if (!ndev) {
2479 ret = -ENODEV;
2480 goto err2;
2481 }
2482
dd5f03be 2483 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
af7bd463 2484
7b85627b
MS		 2485 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2486 &route->path_rec->sgid);
2487 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2488 &route->path_rec->dgid);
af7bd463 2489
c865f246 2490 /* Use the hint from IP Stack to select GID Type */
c3efe750
MB		 2491 if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2492 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2493 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
c865f246 2494 /* TODO: get the hoplimit from the inet/inet6 device */
c3efe750
MB		 2495 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2496 else
c865f246 2497 route->path_rec->hop_limit = 1;
af7bd463
EC		 2498 route->path_rec->reversible = 1;
2499 route->path_rec->pkey = cpu_to_be16(0xffff);
2500 route->path_rec->mtu_selector = IB_SA_EQ;
eb072c4b 2501 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
3c86aa70
EC		 2502 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2503 route->path_rec->rate_selector = IB_SA_EQ;
2504 route->path_rec->rate = iboe_get_rate(ndev);
2505 dev_put(ndev);
2506 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2507 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2508 if (!route->path_rec->mtu) {
2509 ret = -EINVAL;
2510 goto err2;
2511 }
2512
550e5ca7
NM		 2513 work->old_state = RDMA_CM_ROUTE_QUERY;
2514 work->new_state = RDMA_CM_ROUTE_RESOLVED;
3c86aa70
EC		 2515 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2516 work->event.status = 0;
2517
2518 queue_work(cma_wq, &work->work);
2519
2520 return 0;
2521
2522err2:
2523 kfree(route->path_rec);
2524 route->path_rec = NULL;
2525err1:
2526 kfree(work);
2527 return ret;
2528}
2529
e51060f0
SH		 2530int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2531{
2532 struct rdma_id_private *id_priv;
2533 int ret;
2534
2535 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2536 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 2537 return -EINVAL;
2538
2539 atomic_inc(&id_priv->refcount);
fe53ba2f 2540 if (rdma_cap_ib_sa(id->device, id->port_num))
c72f2189 2541 ret = cma_resolve_ib_route(id_priv, timeout_ms);
5d9fb044 2542 else if (rdma_protocol_roce(id->device, id->port_num))
c72f2189
MW		 2543 ret = cma_resolve_iboe_route(id_priv);
2544 else if (rdma_protocol_iwarp(id->device, id->port_num))
07ebafba 2545 ret = cma_resolve_iw_route(id_priv, timeout_ms);
c72f2189 2546 else
e51060f0 2547 ret = -ENOSYS;
c72f2189 2548
e51060f0
SH		 2549 if (ret)
2550 goto err;
2551
2552 return 0;
2553err:
550e5ca7 2554 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2555 cma_deref_id(id_priv);
2556 return ret;
2557}
2558EXPORT_SYMBOL(rdma_resolve_route);
2559
6a3e362d
SH		 2560static void cma_set_loopback(struct sockaddr *addr)
2561{
2562 switch (addr->sa_family) {
2563 case AF_INET:
2564 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2565 break;
2566 case AF_INET6:
2567 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2568 0, 0, 0, htonl(1));
2569 break;
2570 default:
2571 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2572 0, 0, 0, htonl(1));
2573 break;
2574 }
2575}
2576
e51060f0
SH		 2577static int cma_bind_loopback(struct rdma_id_private *id_priv)
2578{
b0569e40 2579 struct cma_device *cma_dev, *cur_dev;
e51060f0 2580 struct ib_port_attr port_attr;
f0ee3404 2581 union ib_gid gid;
e51060f0
SH		 2582 u16 pkey;
2583 int ret;
2584 u8 p;
2585
b0569e40 2586 cma_dev = NULL;
e51060f0 2587 mutex_lock(&lock);
b0569e40
SH		 2588 list_for_each_entry(cur_dev, &dev_list, list) {
2589 if (cma_family(id_priv) == AF_IB &&
72219cea 2590 !rdma_cap_ib_cm(cur_dev->device, 1))
b0569e40
SH		 2591 continue;
2592
2593 if (!cma_dev)
2594 cma_dev = cur_dev;
2595
2596 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2597 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2598 port_attr.state == IB_PORT_ACTIVE) {
2599 cma_dev = cur_dev;
2600 goto port_found;
2601 }
2602 }
2603 }
2604
2605 if (!cma_dev) {
e82153b5
KK		 2606 ret = -ENODEV;
2607 goto out;
2608 }
e51060f0 2609
e82153b5 2610 p = 1;
e51060f0
SH		 2611
2612port_found:
55ee3ab2 2613 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
e51060f0
SH		 2614 if (ret)
2615 goto out;
2616
2617 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2618 if (ret)
2619 goto out;
2620
6f8372b6 2621 id_priv->id.route.addr.dev_addr.dev_type =
21655afc 2622 (rdma_protocol_ib(cma_dev->device, p)) ?
6f8372b6
SH		 2623 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2624
2625 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 2626 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2627 id_priv->id.port_num = p;
2628 cma_attach_to_dev(id_priv, cma_dev);
f4753834 2629 cma_set_loopback(cma_src_addr(id_priv));
e51060f0
SH		 2630out:
2631 mutex_unlock(&lock);
2632 return ret;
2633}
2634
2635static void addr_handler(int status, struct sockaddr *src_addr,
2636 struct rdma_dev_addr *dev_addr, void *context)
2637{
2638 struct rdma_id_private *id_priv = context;
a1b1b61f 2639 struct rdma_cm_event event;
e51060f0 2640
a1b1b61f 2641 memset(&event, 0, sizeof event);
de910bd9 2642 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2643 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2644 RDMA_CM_ADDR_RESOLVED))
61a73c70 2645 goto out;
61a73c70 2646
7b85627b 2647 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
61a73c70 2648 if (!status && !id_priv->cma_dev)
be9130cc 2649 status = cma_acquire_dev(id_priv, NULL);
e51060f0
SH		 2650
2651 if (status) {
550e5ca7
NM		 2652 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2653 RDMA_CM_ADDR_BOUND))
e51060f0 2654 goto out;
a1b1b61f
SH		 2655 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2656 event.status = status;
7b85627b 2657 } else
a1b1b61f 2658 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0 2659
a1b1b61f 2660 if (id_priv->id.event_handler(&id_priv->id, &event)) {
550e5ca7 2661 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2662 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2663 cma_deref_id(id_priv);
2664 rdma_destroy_id(&id_priv->id);
2665 return;
2666 }
2667out:
de910bd9 2668 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2669 cma_deref_id(id_priv);
2670}
2671
2672static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2673{
2674 struct cma_work *work;
f0ee3404 2675 union ib_gid gid;
e51060f0
SH		 2676 int ret;
2677
2678 work = kzalloc(sizeof *work, GFP_KERNEL);
2679 if (!work)
2680 return -ENOMEM;
2681
2682 if (!id_priv->cma_dev) {
2683 ret = cma_bind_loopback(id_priv);
2684 if (ret)
2685 goto err;
2686 }
2687
6f8372b6
SH		 2688 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2689 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2690
e51060f0 2691 work->id = id_priv;
c4028958 2692 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2693 work->old_state = RDMA_CM_ADDR_QUERY;
2694 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0
SH		 2695 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2696 queue_work(cma_wq, &work->work);
2697 return 0;
2698err:
2699 kfree(work);
2700 return ret;
2701}
2702
f17df3b0
SH		 2703static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2704{
2705 struct cma_work *work;
2706 int ret;
2707
2708 work = kzalloc(sizeof *work, GFP_KERNEL);
2709 if (!work)
2710 return -ENOMEM;
2711
2712 if (!id_priv->cma_dev) {
2713 ret = cma_resolve_ib_dev(id_priv);
2714 if (ret)
2715 goto err;
2716 }
2717
2718 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2719 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2720
2721 work->id = id_priv;
2722 INIT_WORK(&work->work, cma_work_handler);
2723 work->old_state = RDMA_CM_ADDR_QUERY;
2724 work->new_state = RDMA_CM_ADDR_RESOLVED;
2725 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2726 queue_work(cma_wq, &work->work);
2727 return 0;
2728err:
2729 kfree(work);
2730 return ret;
2731}
2732
e51060f0
SH		 2733static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2734 struct sockaddr *dst_addr)
2735{
d14714df
SH		 2736 if (!src_addr || !src_addr->sa_family) {
2737 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
f17df3b0
SH		 2738 src_addr->sa_family = dst_addr->sa_family;
2739 if (dst_addr->sa_family == AF_INET6) {
6c26a771
SB		 2740 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2741 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2742 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2743 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2744 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
f17df3b0
SH		 2745 } else if (dst_addr->sa_family == AF_IB) {
2746 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2747 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
d14714df
SH		 2748 }
2749 }
2750 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2751}
2752
2753int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2754 struct sockaddr *dst_addr, int timeout_ms)
2755{
2756 struct rdma_id_private *id_priv;
2757 int ret;
2758
2759 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2760 if (id_priv->state == RDMA_CM_IDLE) {
e51060f0
SH		 2761 ret = cma_bind_addr(id, src_addr, dst_addr);
2762 if (ret)
2763 return ret;
2764 }
2765
4ae7152e
SH		 2766 if (cma_family(id_priv) != dst_addr->sa_family)
2767 return -EINVAL;
2768
550e5ca7 2769 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
e51060f0
SH		 2770 return -EINVAL;
2771
2772 atomic_inc(&id_priv->refcount);
f4753834 2773 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
f17df3b0 2774 if (cma_any_addr(dst_addr)) {
e51060f0 2775 ret = cma_resolve_loopback(id_priv);
f17df3b0
SH		 2776 } else {
2777 if (dst_addr->sa_family == AF_IB) {
2778 ret = cma_resolve_ib_addr(id_priv);
2779 } else {
2780 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2781 dst_addr, &id->route.addr.dev_addr,
2782 timeout_ms, addr_handler, id_priv);
2783 }
2784 }
e51060f0
SH		 2785 if (ret)
2786 goto err;
2787
2788 return 0;
2789err:
550e5ca7 2790 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 2791 cma_deref_id(id_priv);
2792 return ret;
2793}
2794EXPORT_SYMBOL(rdma_resolve_addr);
2795
a9bb7912
HS		 2796int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2797{
2798 struct rdma_id_private *id_priv;
2799 unsigned long flags;
2800 int ret;
2801
2802 id_priv = container_of(id, struct rdma_id_private, id);
2803 spin_lock_irqsave(&id_priv->lock, flags);
c8dea2f9 2804 if (reuse || id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 2805 id_priv->reuseaddr = reuse;
2806 ret = 0;
2807 } else {
2808 ret = -EINVAL;
2809 }
2810 spin_unlock_irqrestore(&id_priv->lock, flags);
2811 return ret;
2812}
2813EXPORT_SYMBOL(rdma_set_reuseaddr);
2814
68602120
SH		 2815int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2816{
2817 struct rdma_id_private *id_priv;
2818 unsigned long flags;
2819 int ret;
2820
2821 id_priv = container_of(id, struct rdma_id_private, id);
2822 spin_lock_irqsave(&id_priv->lock, flags);
2823 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2824 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2825 id_priv->afonly = afonly;
2826 ret = 0;
2827 } else {
2828 ret = -EINVAL;
2829 }
2830 spin_unlock_irqrestore(&id_priv->lock, flags);
2831 return ret;
2832}
2833EXPORT_SYMBOL(rdma_set_afonly);
2834
e51060f0
SH		 2835static void cma_bind_port(struct rdma_bind_list *bind_list,
2836 struct rdma_id_private *id_priv)
2837{
58afdcb7
SH		 2838 struct sockaddr *addr;
2839 struct sockaddr_ib *sib;
2840 u64 sid, mask;
2841 __be16 port;
e51060f0 2842
f4753834 2843 addr = cma_src_addr(id_priv);
58afdcb7
SH		 2844 port = htons(bind_list->port);
2845
2846 switch (addr->sa_family) {
2847 case AF_INET:
2848 ((struct sockaddr_in *) addr)->sin_port = port;
2849 break;
2850 case AF_INET6:
2851 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2852 break;
2853 case AF_IB:
2854 sib = (struct sockaddr_ib *) addr;
2855 sid = be64_to_cpu(sib->sib_sid);
2856 mask = be64_to_cpu(sib->sib_sid_mask);
2857 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2858 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2859 break;
2860 }
e51060f0
SH		 2861 id_priv->bind_list = bind_list;
2862 hlist_add_head(&id_priv->node, &bind_list->owners);
2863}
2864
aac978e1
HE		 2865static int cma_alloc_port(enum rdma_port_space ps,
2866 struct rdma_id_private *id_priv, unsigned short snum)
e51060f0
SH		 2867{
2868 struct rdma_bind_list *bind_list;
3b069c5d 2869 int ret;
e51060f0 2870
cb164b8c 2871 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2872 if (!bind_list)
2873 return -ENOMEM;
2874
fa20105e
GS		 2875 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
2876 snum);
3b069c5d
TH		 2877 if (ret < 0)
2878 goto err;
aedec080
SH		 2879
2880 bind_list->ps = ps;
3b069c5d 2881 bind_list->port = (unsigned short)ret;
aedec080
SH		 2882 cma_bind_port(bind_list, id_priv);
2883 return 0;
3b069c5d 2884err:
aedec080 2885 kfree(bind_list);
3b069c5d 2886 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
aedec080 2887}
e51060f0 2888
aac978e1
HE		 2889static int cma_alloc_any_port(enum rdma_port_space ps,
2890 struct rdma_id_private *id_priv)
aedec080 2891{
5d7220e8
TH		 2892 static unsigned int last_used_port;
2893 int low, high, remaining;
2894 unsigned int rover;
fa20105e 2895 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0 2896
fa20105e 2897 inet_get_local_port_range(net, &low, &high);
5d7220e8 2898 remaining = (high - low) + 1;
63862b5b 2899 rover = prandom_u32() % remaining + low;
5d7220e8
TH		 2900retry:
2901 if (last_used_port != rover &&
fa20105e 2902 !cma_ps_find(net, ps, (unsigned short)rover)) {
5d7220e8
TH		 2903 int ret = cma_alloc_port(ps, id_priv, rover);
2904 /*
2905 * Remember previously used port number in order to avoid
2906 * re-using same port immediately after it is closed.
2907 */
2908 if (!ret)
2909 last_used_port = rover;
2910 if (ret != -EADDRNOTAVAIL)
2911 return ret;
e51060f0 2912 }
5d7220e8
TH		 2913 if (--remaining) {
2914 rover++;
2915 if ((rover < low) || (rover > high))
2916 rover = low;
2917 goto retry;
2918 }
2919 return -EADDRNOTAVAIL;
e51060f0
SH		 2920}
2921
a9bb7912
HS		 2922/*
2923 * Check that the requested port is available. This is called when trying to
2924 * bind to a specific port, or when trying to listen on a bound port. In
2925 * the latter case, the provided id_priv may already be on the bind_list, but
2926 * we still need to check that it's okay to start listening.
2927 */
2928static int cma_check_port(struct rdma_bind_list *bind_list,
2929 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 2930{
2931 struct rdma_id_private *cur_id;
43b752da 2932 struct sockaddr *addr, *cur_addr;
e51060f0 2933
f4753834 2934 addr = cma_src_addr(id_priv);
b67bfe0d 2935 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
a9bb7912
HS		 2936 if (id_priv == cur_id)
2937 continue;
3cd96564 2938
5b0ec991
SH		 2939 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2940 cur_id->reuseaddr)
2941 continue;
e51060f0 2942
f4753834 2943 cur_addr = cma_src_addr(cur_id);
5b0ec991
SH		 2944 if (id_priv->afonly && cur_id->afonly &&
2945 (addr->sa_family != cur_addr->sa_family))
2946 continue;
2947
2948 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2949 return -EADDRNOTAVAIL;
2950
2951 if (!cma_addr_cmp(addr, cur_addr))
2952 return -EADDRINUSE;
a9bb7912 2953 }
e51060f0
SH		 2954 return 0;
2955}
2956
aac978e1
HE		 2957static int cma_use_port(enum rdma_port_space ps,
2958 struct rdma_id_private *id_priv)
a9bb7912
HS		 2959{
2960 struct rdma_bind_list *bind_list;
2961 unsigned short snum;
2962 int ret;
2963
f4753834 2964 snum = ntohs(cma_port(cma_src_addr(id_priv)));
a9bb7912
HS		 2965 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2966 return -EACCES;
2967
fa20105e 2968 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
a9bb7912
HS		 2969 if (!bind_list) {
2970 ret = cma_alloc_port(ps, id_priv, snum);
2971 } else {
2972 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2973 if (!ret)
2974 cma_bind_port(bind_list, id_priv);
2975 }
2976 return ret;
2977}
2978
2979static int cma_bind_listen(struct rdma_id_private *id_priv)
2980{
2981 struct rdma_bind_list *bind_list = id_priv->bind_list;
2982 int ret = 0;
2983
2984 mutex_lock(&lock);
2985 if (bind_list->owners.first->next)
2986 ret = cma_check_port(bind_list, id_priv, 0);
2987 mutex_unlock(&lock);
2988 return ret;
2989}
2990
aac978e1
HE		 2991static enum rdma_port_space cma_select_inet_ps(
2992 struct rdma_id_private *id_priv)
e51060f0 2993{
e51060f0 2994 switch (id_priv->id.ps) {
e51060f0 2995 case RDMA_PS_TCP:
628e5f6d 2996 case RDMA_PS_UDP:
c8f6a362 2997 case RDMA_PS_IPOIB:
2d2e9415 2998 case RDMA_PS_IB:
aac978e1 2999 return id_priv->id.ps;
e51060f0 3000 default:
aac978e1
HE		 3001
3002 return 0;
58afdcb7
SH		 3003 }
3004}
3005
aac978e1 3006static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
58afdcb7 3007{
aac978e1 3008 enum rdma_port_space ps = 0;
58afdcb7
SH		 3009 struct sockaddr_ib *sib;
3010 u64 sid_ps, mask, sid;
3011
f4753834 3012 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
58afdcb7
SH		 3013 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3014 sid = be64_to_cpu(sib->sib_sid) & mask;
3015
3016 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3017 sid_ps = RDMA_IB_IP_PS_IB;
aac978e1 3018 ps = RDMA_PS_IB;
58afdcb7
SH		 3019 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3020 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3021 sid_ps = RDMA_IB_IP_PS_TCP;
aac978e1 3022 ps = RDMA_PS_TCP;
58afdcb7
SH		 3023 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3024 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3025 sid_ps = RDMA_IB_IP_PS_UDP;
aac978e1 3026 ps = RDMA_PS_UDP;
e51060f0
SH		 3027 }
3028
58afdcb7
SH		 3029 if (ps) {
3030 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3031 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3032 be64_to_cpu(sib->sib_sid_mask));
3033 }
3034 return ps;
3035}
3036
3037static int cma_get_port(struct rdma_id_private *id_priv)
3038{
aac978e1 3039 enum rdma_port_space ps;
58afdcb7
SH		 3040 int ret;
3041
f4753834 3042 if (cma_family(id_priv) != AF_IB)
58afdcb7
SH		 3043 ps = cma_select_inet_ps(id_priv);
3044 else
3045 ps = cma_select_ib_ps(id_priv);
3046 if (!ps)
3047 return -EPROTONOSUPPORT;
3048
e51060f0 3049 mutex_lock(&lock);
f4753834 3050 if (cma_any_port(cma_src_addr(id_priv)))
aedec080 3051 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 3052 else
3053 ret = cma_use_port(ps, id_priv);
3054 mutex_unlock(&lock);
3055
3056 return ret;
3057}
3058
d14714df
SH		 3059static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3060 struct sockaddr *addr)
3061{
d90f9b35 3062#if IS_ENABLED(CONFIG_IPV6)
d14714df
SH		 3063 struct sockaddr_in6 *sin6;
3064
3065 if (addr->sa_family != AF_INET6)
3066 return 0;
3067
3068 sin6 = (struct sockaddr_in6 *) addr;
5462eddd
SK		 3069
3070 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3071 return 0;
3072
3073 if (!sin6->sin6_scope_id)
d14714df
SH		 3074 return -EINVAL;
3075
3076 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3077#endif
3078 return 0;
3079}
3080
a9bb7912
HS		 3081int rdma_listen(struct rdma_cm_id *id, int backlog)
3082{
3083 struct rdma_id_private *id_priv;
3084 int ret;
3085
3086 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3087 if (id_priv->state == RDMA_CM_IDLE) {
f4753834
SH		 3088 id->route.addr.src_addr.ss_family = AF_INET;
3089 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
a9bb7912
HS		 3090 if (ret)
3091 return ret;
3092 }
3093
550e5ca7 3094 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
a9bb7912
HS		 3095 return -EINVAL;
3096
3097 if (id_priv->reuseaddr) {
3098 ret = cma_bind_listen(id_priv);
3099 if (ret)
3100 goto err;
3101 }
3102
3103 id_priv->backlog = backlog;
3104 if (id->device) {
72219cea 3105 if (rdma_cap_ib_cm(id->device, 1)) {
a9bb7912
HS		 3106 ret = cma_ib_listen(id_priv);
3107 if (ret)
3108 goto err;
04215330 3109 } else if (rdma_cap_iw_cm(id->device, 1)) {
a9bb7912
HS		 3110 ret = cma_iw_listen(id_priv, backlog);
3111 if (ret)
3112 goto err;
21655afc 3113 } else {
a9bb7912
HS		 3114 ret = -ENOSYS;
3115 goto err;
3116 }
3117 } else
3118 cma_listen_on_all(id_priv);
3119
3120 return 0;
3121err:
3122 id_priv->backlog = 0;
550e5ca7 3123 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 3124 return ret;
3125}
3126EXPORT_SYMBOL(rdma_listen);
3127
e51060f0
SH		 3128int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3129{
3130 struct rdma_id_private *id_priv;
3131 int ret;
3132
680f920a
SH		 3133 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3134 addr->sa_family != AF_IB)
e51060f0
SH		 3135 return -EAFNOSUPPORT;
3136
3137 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3138 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 3139 return -EINVAL;
3140
d14714df
SH		 3141 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3142 if (ret)
3143 goto err1;
3144
7b85627b 3145 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
8523c048 3146 if (!cma_any_addr(addr)) {
680f920a 3147 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
e51060f0 3148 if (ret)
255d0c14
KK		 3149 goto err1;
3150
be9130cc 3151 ret = cma_acquire_dev(id_priv, NULL);
255d0c14
KK		 3152 if (ret)
3153 goto err1;
e51060f0
SH		 3154 }
3155
68602120
SH		 3156 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3157 if (addr->sa_family == AF_INET)
3158 id_priv->afonly = 1;
5b0ec991 3159#if IS_ENABLED(CONFIG_IPV6)
fa20105e
GS		 3160 else if (addr->sa_family == AF_INET6) {
3161 struct net *net = id_priv->id.route.addr.dev_addr.net;
3162
3163 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3164 }
5b0ec991 3165#endif
68602120 3166 }
e51060f0
SH		 3167 ret = cma_get_port(id_priv);
3168 if (ret)
255d0c14 3169 goto err2;
e51060f0
SH		 3170
3171 return 0;
255d0c14 3172err2:
a396d43a
SH		 3173 if (id_priv->cma_dev)
3174 cma_release_dev(id_priv);
255d0c14 3175err1:
550e5ca7 3176 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 3177 return ret;
3178}
3179EXPORT_SYMBOL(rdma_bind_addr);
3180
f4753834 3181static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
e51060f0 3182{
e51060f0 3183 struct cma_hdr *cma_hdr;
e51060f0 3184
01602f11
SH		 3185 cma_hdr = hdr;
3186 cma_hdr->cma_version = CMA_VERSION;
f4753834 3187 if (cma_family(id_priv) == AF_INET) {
1f5175ad
AS		 3188 struct sockaddr_in *src4, *dst4;
3189
f4753834
SH		 3190 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3191 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
1f5175ad 3192
01602f11
SH		 3193 cma_set_ip_ver(cma_hdr, 4);
3194 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3195 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3196 cma_hdr->port = src4->sin_port;
e8160e15 3197 } else if (cma_family(id_priv) == AF_INET6) {
1f5175ad
AS		 3198 struct sockaddr_in6 *src6, *dst6;
3199
f4753834
SH		 3200 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3201 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
1f5175ad 3202
01602f11
SH		 3203 cma_set_ip_ver(cma_hdr, 6);
3204 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3205 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3206 cma_hdr->port = src6->sin6_port;
e51060f0
SH		 3207 }
3208 return 0;
3209}
3210
628e5f6d
SH		 3211static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3212 struct ib_cm_event *ib_event)
3213{
3214 struct rdma_id_private *id_priv = cm_id->context;
3215 struct rdma_cm_event event;
3216 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3217 int ret = 0;
3218
550e5ca7 3219 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
8aa08602 3220 return 0;
628e5f6d 3221
8aa08602 3222 memset(&event, 0, sizeof event);
628e5f6d
SH		 3223 switch (ib_event->event) {
3224 case IB_CM_SIDR_REQ_ERROR:
3225 event.event = RDMA_CM_EVENT_UNREACHABLE;
3226 event.status = -ETIMEDOUT;
3227 break;
3228 case IB_CM_SIDR_REP_RECEIVED:
3229 event.param.ud.private_data = ib_event->private_data;
3230 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3231 if (rep->status != IB_SIDR_SUCCESS) {
3232 event.event = RDMA_CM_EVENT_UNREACHABLE;
3233 event.status = ib_event->param.sidr_rep_rcvd.status;
3234 break;
3235 }
5c438135 3236 ret = cma_set_qkey(id_priv, rep->qkey);
d2ca39f2
YE		 3237 if (ret) {
3238 event.event = RDMA_CM_EVENT_ADDR_ERROR;
5c438135 3239 event.status = ret;
628e5f6d
SH		 3240 break;
3241 }
3242 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3243 id_priv->id.route.path_rec,
3244 &event.param.ud.ah_attr);
3245 event.param.ud.qp_num = rep->qpn;
3246 event.param.ud.qkey = rep->qkey;
3247 event.event = RDMA_CM_EVENT_ESTABLISHED;
3248 event.status = 0;
3249 break;
3250 default:
aba25a3e 3251 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 3252 ib_event->event);
3253 goto out;
3254 }
3255
3256 ret = id_priv->id.event_handler(&id_priv->id, &event);
3257 if (ret) {
3258 /* Destroy the CM ID by returning a non-zero value. */
3259 id_priv->cm_id.ib = NULL;
550e5ca7 3260 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 3261 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 3262 rdma_destroy_id(&id_priv->id);
3263 return ret;
3264 }
3265out:
de910bd9 3266 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 3267 return ret;
3268}
3269
3270static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3271 struct rdma_conn_param *conn_param)
3272{
3273 struct ib_cm_sidr_req_param req;
0c9361fc 3274 struct ib_cm_id *id;
e511d1ae 3275 void *private_data;
e8160e15 3276 int offset, ret;
628e5f6d 3277
e511d1ae 3278 memset(&req, 0, sizeof req);
e8160e15
SH		 3279 offset = cma_user_data_offset(id_priv);
3280 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 3281 if (req.private_data_len < conn_param->private_data_len)
3282 return -EINVAL;
3283
e8160e15 3284 if (req.private_data_len) {
e511d1ae
SH		 3285 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3286 if (!private_data)
e8160e15
SH		 3287 return -ENOMEM;
3288 } else {
e511d1ae 3289 private_data = NULL;
e8160e15 3290 }
628e5f6d
SH		 3291
3292 if (conn_param->private_data && conn_param->private_data_len)
e511d1ae
SH		 3293 memcpy(private_data + offset, conn_param->private_data,
3294 conn_param->private_data_len);
628e5f6d 3295
e511d1ae
SH		 3296 if (private_data) {
3297 ret = cma_format_hdr(private_data, id_priv);
e8160e15
SH		 3298 if (ret)
3299 goto out;
e511d1ae 3300 req.private_data = private_data;
e8160e15 3301 }
628e5f6d 3302
0c9361fc
JM		 3303 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3304 id_priv);
3305 if (IS_ERR(id)) {
3306 ret = PTR_ERR(id);
628e5f6d
SH		 3307 goto out;
3308 }
0c9361fc 3309 id_priv->cm_id.ib = id;
628e5f6d 3310
f4753834 3311 req.path = id_priv->id.route.path_rec;
cf53936f 3312 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
628e5f6d
SH		 3313 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3314 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3315
3316 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3317 if (ret) {
3318 ib_destroy_cm_id(id_priv->cm_id.ib);
3319 id_priv->cm_id.ib = NULL;
3320 }
3321out:
e511d1ae 3322 kfree(private_data);
628e5f6d
SH		 3323 return ret;
3324}
3325
e51060f0
SH		 3326static int cma_connect_ib(struct rdma_id_private *id_priv,
3327 struct rdma_conn_param *conn_param)
3328{
3329 struct ib_cm_req_param req;
3330 struct rdma_route *route;
3331 void *private_data;
0c9361fc 3332 struct ib_cm_id *id;
e51060f0
SH		 3333 int offset, ret;
3334
3335 memset(&req, 0, sizeof req);
e8160e15 3336 offset = cma_user_data_offset(id_priv);
e51060f0 3337 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 3338 if (req.private_data_len < conn_param->private_data_len)
3339 return -EINVAL;
3340
e8160e15
SH		 3341 if (req.private_data_len) {
3342 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3343 if (!private_data)
3344 return -ENOMEM;
3345 } else {
3346 private_data = NULL;
3347 }
e51060f0
SH		 3348
3349 if (conn_param->private_data && conn_param->private_data_len)
3350 memcpy(private_data + offset, conn_param->private_data,
3351 conn_param->private_data_len);
3352
0c9361fc
JM		 3353 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3354 if (IS_ERR(id)) {
3355 ret = PTR_ERR(id);
e51060f0
SH		 3356 goto out;
3357 }
0c9361fc 3358 id_priv->cm_id.ib = id;
e51060f0
SH		 3359
3360 route = &id_priv->id.route;
e8160e15
SH		 3361 if (private_data) {
3362 ret = cma_format_hdr(private_data, id_priv);
3363 if (ret)
3364 goto out;
3365 req.private_data = private_data;
3366 }
e51060f0
SH		 3367
3368 req.primary_path = &route->path_rec[0];
3369 if (route->num_paths == 2)
3370 req.alternate_path = &route->path_rec[1];
3371
cf53936f 3372 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
e51060f0 3373 req.qp_num = id_priv->qp_num;
18c441a6 3374 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 3375 req.starting_psn = id_priv->seq_num;
3376 req.responder_resources = conn_param->responder_resources;
3377 req.initiator_depth = conn_param->initiator_depth;
3378 req.flow_control = conn_param->flow_control;
4ede178a
SH		 3379 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3380 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 3381 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3382 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3383 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3384 req.srq = id_priv->srq ? 1 : 0;
3385
3386 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3387out:
0c9361fc
JM		 3388 if (ret && !IS_ERR(id)) {
3389 ib_destroy_cm_id(id);
675a027c
KK		 3390 id_priv->cm_id.ib = NULL;
3391 }
3392
e51060f0
SH		 3393 kfree(private_data);
3394 return ret;
3395}
3396
07ebafba
TT		 3397static int cma_connect_iw(struct rdma_id_private *id_priv,
3398 struct rdma_conn_param *conn_param)
3399{
3400 struct iw_cm_id *cm_id;
07ebafba
TT		 3401 int ret;
3402 struct iw_cm_conn_param iw_param;
3403
3404 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 3405 if (IS_ERR(cm_id))
3406 return PTR_ERR(cm_id);
07ebafba 3407
68cdba06 3408 cm_id->tos = id_priv->tos;
07ebafba
TT		 3409 id_priv->cm_id.iw = cm_id;
3410
24d44a39
SW		 3411 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3412 rdma_addr_size(cma_src_addr(id_priv)));
3413 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3414 rdma_addr_size(cma_dst_addr(id_priv)));
07ebafba 3415
5851bb89 3416 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 3417 if (ret)
3418 goto out;
07ebafba 3419
f45ee80e
HS		 3420 if (conn_param) {
3421 iw_param.ord = conn_param->initiator_depth;
3422 iw_param.ird = conn_param->responder_resources;
3423 iw_param.private_data = conn_param->private_data;
3424 iw_param.private_data_len = conn_param->private_data_len;
3425 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3426 } else {
3427 memset(&iw_param, 0, sizeof iw_param);
07ebafba 3428 iw_param.qpn = id_priv->qp_num;
f45ee80e 3429 }
07ebafba
TT		 3430 ret = iw_cm_connect(cm_id, &iw_param);
3431out:
0c9361fc 3432 if (ret) {
675a027c
KK		 3433 iw_destroy_cm_id(cm_id);
3434 id_priv->cm_id.iw = NULL;
3435 }
07ebafba
TT		 3436 return ret;
3437}
3438
e51060f0
SH		 3439int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3440{
3441 struct rdma_id_private *id_priv;
3442 int ret;
3443
3444 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3445 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
e51060f0
SH		 3446 return -EINVAL;
3447
3448 if (!id->qp) {
3449 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3450 id_priv->srq = conn_param->srq;
3451 }
3452
72219cea 3453 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 3454 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 3455 ret = cma_resolve_ib_udp(id_priv, conn_param);
3456 else
3457 ret = cma_connect_ib(id_priv, conn_param);
04215330 3458 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 3459 ret = cma_connect_iw(id_priv, conn_param);
21655afc 3460 else
e51060f0 3461 ret = -ENOSYS;
e51060f0
SH		 3462 if (ret)
3463 goto err;
3464
3465 return 0;
3466err:
550e5ca7 3467 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
e51060f0
SH		 3468 return ret;
3469}
3470EXPORT_SYMBOL(rdma_connect);
3471
3472static int cma_accept_ib(struct rdma_id_private *id_priv,
3473 struct rdma_conn_param *conn_param)
3474{
3475 struct ib_cm_rep_param rep;
5851bb89 3476 int ret;
0fe313b0 3477
5851bb89
SH		 3478 ret = cma_modify_qp_rtr(id_priv, conn_param);
3479 if (ret)
3480 goto out;
0fe313b0 3481
5851bb89
SH		 3482 ret = cma_modify_qp_rts(id_priv, conn_param);
3483 if (ret)
3484 goto out;
e51060f0
SH		 3485
3486 memset(&rep, 0, sizeof rep);
3487 rep.qp_num = id_priv->qp_num;
3488 rep.starting_psn = id_priv->seq_num;
3489 rep.private_data = conn_param->private_data;
3490 rep.private_data_len = conn_param->private_data_len;
3491 rep.responder_resources = conn_param->responder_resources;
3492 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 3493 rep.failover_accepted = 0;
3494 rep.flow_control = conn_param->flow_control;
4ede178a 3495 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 3496 rep.srq = id_priv->srq ? 1 : 0;
3497
0fe313b0
SH		 3498 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3499out:
3500 return ret;
e51060f0
SH		 3501}
3502
07ebafba
TT		 3503static int cma_accept_iw(struct rdma_id_private *id_priv,
3504 struct rdma_conn_param *conn_param)
3505{
3506 struct iw_cm_conn_param iw_param;
3507 int ret;
3508
5851bb89 3509 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 3510 if (ret)
3511 return ret;
3512
3513 iw_param.ord = conn_param->initiator_depth;
3514 iw_param.ird = conn_param->responder_resources;
3515 iw_param.private_data = conn_param->private_data;
3516 iw_param.private_data_len = conn_param->private_data_len;
3517 if (id_priv->id.qp) {
3518 iw_param.qpn = id_priv->qp_num;
3519 } else
3520 iw_param.qpn = conn_param->qp_num;
3521
3522 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3523}
3524
628e5f6d 3525static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
5c438135 3526 enum ib_cm_sidr_status status, u32 qkey,
628e5f6d
SH		 3527 const void *private_data, int private_data_len)
3528{
3529 struct ib_cm_sidr_rep_param rep;
d2ca39f2 3530 int ret;
628e5f6d
SH		 3531
3532 memset(&rep, 0, sizeof rep);
3533 rep.status = status;
3534 if (status == IB_SIDR_SUCCESS) {
5c438135 3535 ret = cma_set_qkey(id_priv, qkey);
d2ca39f2
YE		 3536 if (ret)
3537 return ret;
628e5f6d 3538 rep.qp_num = id_priv->qp_num;
c8f6a362 3539 rep.qkey = id_priv->qkey;
628e5f6d
SH		 3540 }
3541 rep.private_data = private_data;
3542 rep.private_data_len = private_data_len;
3543
3544 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3545}
3546
e51060f0
SH		 3547int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3548{
3549 struct rdma_id_private *id_priv;
3550 int ret;
3551
3552 id_priv = container_of(id, struct rdma_id_private, id);
83e9502d
NM		 3553
3554 id_priv->owner = task_pid_nr(current);
3555
550e5ca7 3556 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
e51060f0
SH		 3557 return -EINVAL;
3558
3559 if (!id->qp && conn_param) {
3560 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3561 id_priv->srq = conn_param->srq;
3562 }
3563
72219cea 3564 if (rdma_cap_ib_cm(id->device, id->port_num)) {
f45ee80e
HS		 3565 if (id->qp_type == IB_QPT_UD) {
3566 if (conn_param)
3567 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3568 conn_param->qkey,
f45ee80e
HS		 3569 conn_param->private_data,
3570 conn_param->private_data_len);
3571 else
3572 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3573 0, NULL, 0);
f45ee80e
HS		 3574 } else {
3575 if (conn_param)
3576 ret = cma_accept_ib(id_priv, conn_param);
3577 else
3578 ret = cma_rep_recv(id_priv);
3579 }
04215330 3580 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 3581 ret = cma_accept_iw(id_priv, conn_param);
21655afc 3582 else
e51060f0 3583 ret = -ENOSYS;
e51060f0
SH		 3584
3585 if (ret)
3586 goto reject;
3587
3588 return 0;
3589reject:
c5483388 3590 cma_modify_qp_err(id_priv);
e51060f0
SH		 3591 rdma_reject(id, NULL, 0);
3592 return ret;
3593}
3594EXPORT_SYMBOL(rdma_accept);
3595
0fe313b0
SH		 3596int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3597{
3598 struct rdma_id_private *id_priv;
3599 int ret;
3600
3601 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3602 if (!id_priv->cm_id.ib)
0fe313b0
SH		 3603 return -EINVAL;
3604
3605 switch (id->device->node_type) {
3606 case RDMA_NODE_IB_CA:
3607 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3608 break;
3609 default:
3610 ret = 0;
3611 break;
3612 }
3613 return ret;
3614}
3615EXPORT_SYMBOL(rdma_notify);
3616
e51060f0
SH		 3617int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3618 u8 private_data_len)
3619{
3620 struct rdma_id_private *id_priv;
3621 int ret;
3622
3623 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3624 if (!id_priv->cm_id.ib)
e51060f0
SH		 3625 return -EINVAL;
3626
72219cea 3627 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 3628 if (id->qp_type == IB_QPT_UD)
5c438135 3629 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
628e5f6d
SH		 3630 private_data, private_data_len);
3631 else
3632 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3633 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3634 0, private_data, private_data_len);
04215330 3635 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba
TT		 3636 ret = iw_cm_reject(id_priv->cm_id.iw,
3637 private_data, private_data_len);
21655afc 3638 } else
e51060f0 3639 ret = -ENOSYS;
21655afc 3640
e51060f0
SH		 3641 return ret;
3642}
3643EXPORT_SYMBOL(rdma_reject);
3644
3645int rdma_disconnect(struct rdma_cm_id *id)
3646{
3647 struct rdma_id_private *id_priv;
3648 int ret;
3649
3650 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3651 if (!id_priv->cm_id.ib)
e51060f0
SH		 3652 return -EINVAL;
3653
72219cea 3654 if (rdma_cap_ib_cm(id->device, id->port_num)) {
c5483388 3655 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 3656 if (ret)
3657 goto out;
e51060f0
SH		 3658 /* Initiate or respond to a disconnect. */
3659 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3660 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
04215330 3661 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba 3662 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
21655afc 3663 } else
07ebafba 3664 ret = -EINVAL;
21655afc 3665
e51060f0
SH		 3666out:
3667 return ret;
3668}
3669EXPORT_SYMBOL(rdma_disconnect);
3670
c8f6a362
SH		 3671static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3672{
3673 struct rdma_id_private *id_priv;
3674 struct cma_multicast *mc = multicast->context;
3675 struct rdma_cm_event event;
3676 int ret;
3677
3678 id_priv = mc->id_priv;
550e5ca7
NM		 3679 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3680 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
8aa08602 3681 return 0;
c8f6a362 3682
5c438135
SH		 3683 if (!status)
3684 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
c5483388 3685 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 3686 if (!status && id_priv->id.qp)
3687 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
46ea5061 3688 be16_to_cpu(multicast->rec.mlid));
c5483388 3689 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 3690
3691 memset(&event, 0, sizeof event);
3692 event.status = status;
3693 event.param.ud.private_data = mc->context;
3694 if (!status) {
bee3c3c9
MS		 3695 struct rdma_dev_addr *dev_addr =
3696 &id_priv->id.route.addr.dev_addr;
3697 struct net_device *ndev =
3698 dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3699 enum ib_gid_type gid_type =
3700 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3701 rdma_start_port(id_priv->cma_dev->device)];
3702
c8f6a362
SH		 3703 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3704 ib_init_ah_from_mcmember(id_priv->id.device,
3705 id_priv->id.port_num, &multicast->rec,
bee3c3c9 3706 ndev, gid_type,
c8f6a362
SH		 3707 &event.param.ud.ah_attr);
3708 event.param.ud.qp_num = 0xFFFFFF;
3709 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
bee3c3c9
MS		 3710 if (ndev)
3711 dev_put(ndev);
c8f6a362
SH		 3712 } else
3713 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3714
3715 ret = id_priv->id.event_handler(&id_priv->id, &event);
3716 if (ret) {
550e5ca7 3717 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 3718 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3719 rdma_destroy_id(&id_priv->id);
3720 return 0;
3721 }
8aa08602 3722
de910bd9 3723 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3724 return 0;
3725}
3726
3727static void cma_set_mgid(struct rdma_id_private *id_priv,
3728 struct sockaddr *addr, union ib_gid *mgid)
3729{
3730 unsigned char mc_map[MAX_ADDR_LEN];
3731 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3732 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3733 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3734
3735 if (cma_any_addr(addr)) {
3736 memset(mgid, 0, sizeof *mgid);
3737 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 3738 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 3739 0xFF10A01B)) {
3740 /* IPv6 address is an SA assigned MGID. */
3741 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
5bc2b7b3
SH		 3742 } else if (addr->sa_family == AF_IB) {
3743 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
e2e62697
JG		 3744 } else if ((addr->sa_family == AF_INET6)) {
3745 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3746 if (id_priv->id.ps == RDMA_PS_UDP)
3747 mc_map[7] = 0x01; /* Use RDMA CM signature */
3748 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 3749 } else {
a9e527e3 3750 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 3751 if (id_priv->id.ps == RDMA_PS_UDP)
3752 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 3753 *mgid = *(union ib_gid *) (mc_map + 4);
3754 }
3755}
3756
3757static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3758 struct cma_multicast *mc)
3759{
3760 struct ib_sa_mcmember_rec rec;
3761 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3762 ib_sa_comp_mask comp_mask;
3763 int ret;
3764
3765 ib_addr_get_mgid(dev_addr, &rec.mgid);
3766 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3767 &rec.mgid, &rec);
3768 if (ret)
3769 return ret;
3770
5bc2b7b3
SH		 3771 ret = cma_set_qkey(id_priv, 0);
3772 if (ret)
3773 return ret;
3774
3f446754 3775 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
5bc2b7b3 3776 rec.qkey = cpu_to_be32(id_priv->qkey);
6f8372b6 3777 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 3778 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3779 rec.join_state = 1;
3780
3781 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3782 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3783 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3784 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3785 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3786
84adeee9
YE		 3787 if (id_priv->id.ps == RDMA_PS_IPOIB)
3788 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2a22fb8c
DB		 3789 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3790 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3791 IB_SA_MCMEMBER_REC_MTU |
3792 IB_SA_MCMEMBER_REC_HOP_LIMIT;
84adeee9 3793
c8f6a362
SH		 3794 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3795 id_priv->id.port_num, &rec,
3796 comp_mask, GFP_KERNEL,
3797 cma_ib_mc_handler, mc);
8c6ffba0 3798 return PTR_ERR_OR_ZERO(mc->multicast.ib);
c8f6a362
SH		 3799}
3800
3c86aa70
EC		 3801static void iboe_mcast_work_handler(struct work_struct *work)
3802{
3803 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3804 struct cma_multicast *mc = mw->mc;
3805 struct ib_sa_multicast *m = mc->multicast.ib;
3806
3807 mc->multicast.ib->context = mc;
3808 cma_ib_mc_handler(0, m);
3809 kref_put(&mc->mcref, release_mc);
3810 kfree(mw);
3811}
3812
3813static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3814{
3815 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3816 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3817
3818 if (cma_any_addr(addr)) {
3819 memset(mgid, 0, sizeof *mgid);
3820 } else if (addr->sa_family == AF_INET6) {
3821 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3822 } else {
3823 mgid->raw[0] = 0xff;
3824 mgid->raw[1] = 0x0e;
3825 mgid->raw[2] = 0;
3826 mgid->raw[3] = 0;
3827 mgid->raw[4] = 0;
3828 mgid->raw[5] = 0;
3829 mgid->raw[6] = 0;
3830 mgid->raw[7] = 0;
3831 mgid->raw[8] = 0;
3832 mgid->raw[9] = 0;
3833 mgid->raw[10] = 0xff;
3834 mgid->raw[11] = 0xff;
3835 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3836 }
3837}
3838
3839static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3840 struct cma_multicast *mc)
3841{
3842 struct iboe_mcast_work *work;
3843 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
bee3c3c9 3844 int err = 0;
3c86aa70
EC		 3845 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3846 struct net_device *ndev = NULL;
bee3c3c9 3847 enum ib_gid_type gid_type;
3c86aa70
EC		 3848
3849 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3850 return -EINVAL;
3851
3852 work = kzalloc(sizeof *work, GFP_KERNEL);
3853 if (!work)
3854 return -ENOMEM;
3855
3856 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3857 if (!mc->multicast.ib) {
3858 err = -ENOMEM;
3859 goto out1;
3860 }
3861
3862 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3863
3864 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3865 if (id_priv->id.ps == RDMA_PS_UDP)
3866 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3867
3868 if (dev_addr->bound_dev_if)
3869 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3870 if (!ndev) {
3871 err = -ENODEV;
3872 goto out2;
3873 }
3874 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3875 mc->multicast.ib->rec.hop_limit = 1;
3876 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
bee3c3c9
MS		 3877
3878 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3879 rdma_start_port(id_priv->cma_dev->device)];
3880 if (addr->sa_family == AF_INET) {
3881 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
3882 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
3883 true);
3884 if (!err) {
3885 mc->igmp_joined = true;
3886 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
3887 }
3888 } else {
3889 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
3890 err = -ENOTSUPP;
3891 }
3c86aa70 3892 dev_put(ndev);
bee3c3c9
MS		 3893 if (err || !mc->multicast.ib->rec.mtu) {
3894 if (!err)
3895 err = -EINVAL;
3c86aa70
EC		 3896 goto out2;
3897 }
7b85627b
MS		 3898 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3899 &mc->multicast.ib->rec.port_gid);
3c86aa70
EC		 3900 work->id = id_priv;
3901 work->mc = mc;
3902 INIT_WORK(&work->work, iboe_mcast_work_handler);
3903 kref_get(&mc->mcref);
3904 queue_work(cma_wq, &work->work);
3905
3906 return 0;
3907
3908out2:
3909 kfree(mc->multicast.ib);
3910out1:
3911 kfree(work);
3912 return err;
3913}
3914
c8f6a362
SH		 3915int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3916 void *context)
3917{
3918 struct rdma_id_private *id_priv;
3919 struct cma_multicast *mc;
3920 int ret;
3921
3922 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 3923 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3924 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 3925 return -EINVAL;
3926
3927 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3928 if (!mc)
3929 return -ENOMEM;
3930
ef560861 3931 memcpy(&mc->addr, addr, rdma_addr_size(addr));
c8f6a362
SH		 3932 mc->context = context;
3933 mc->id_priv = id_priv;
bee3c3c9 3934 mc->igmp_joined = false;
c8f6a362
SH		 3935 spin_lock(&id_priv->lock);
3936 list_add(&mc->list, &id_priv->mc_list);
3937 spin_unlock(&id_priv->lock);
3938
5d9fb044 3939 if (rdma_protocol_roce(id->device, id->port_num)) {
5c9a5282
MW		 3940 kref_init(&mc->mcref);
3941 ret = cma_iboe_join_multicast(id_priv, mc);
a31ad3b0 3942 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
5c9a5282
MW		 3943 ret = cma_join_ib_multicast(id_priv, mc);
3944 else
c8f6a362 3945 ret = -ENOSYS;
c8f6a362
SH		 3946
3947 if (ret) {
3948 spin_lock_irq(&id_priv->lock);
3949 list_del(&mc->list);
3950 spin_unlock_irq(&id_priv->lock);
3951 kfree(mc);
3952 }
3953 return ret;
3954}
3955EXPORT_SYMBOL(rdma_join_multicast);
3956
3957void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3958{
3959 struct rdma_id_private *id_priv;
3960 struct cma_multicast *mc;
3961
3962 id_priv = container_of(id, struct rdma_id_private, id);
3963 spin_lock_irq(&id_priv->lock);
3964 list_for_each_entry(mc, &id_priv->mc_list, list) {
ef560861 3965 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
c8f6a362
SH		 3966 list_del(&mc->list);
3967 spin_unlock_irq(&id_priv->lock);
3968
3969 if (id->qp)
3970 ib_detach_mcast(id->qp,
3971 &mc->multicast.ib->rec.mgid,
46ea5061 3972 be16_to_cpu(mc->multicast.ib->rec.mlid));
5c9a5282
MW		 3973
3974 BUG_ON(id_priv->cma_dev->device != id->device);
3975
a31ad3b0 3976 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
5c9a5282
MW		 3977 ib_sa_free_multicast(mc->multicast.ib);
3978 kfree(mc);
bee3c3c9
MS		 3979 } else if (rdma_protocol_roce(id->device, id->port_num)) {
3980 if (mc->igmp_joined) {
3981 struct rdma_dev_addr *dev_addr =
3982 &id->route.addr.dev_addr;
3983 struct net_device *ndev = NULL;
3984
3985 if (dev_addr->bound_dev_if)
3986 ndev = dev_get_by_index(&init_net,
3987 dev_addr->bound_dev_if);
3988 if (ndev) {
3989 cma_igmp_send(ndev,
3990 &mc->multicast.ib->rec.mgid,
3991 false);
3992 dev_put(ndev);
3993 }
3994 mc->igmp_joined = false;
3995 }
5c9a5282 3996 kref_put(&mc->mcref, release_mc);
bee3c3c9 3997 }
c8f6a362
SH		 3998 return;
3999 }
4000 }
4001 spin_unlock_irq(&id_priv->lock);
4002}
4003EXPORT_SYMBOL(rdma_leave_multicast);
4004
dd5bdff8
OG		 4005static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4006{
4007 struct rdma_dev_addr *dev_addr;
4008 struct cma_ndev_work *work;
4009
4010 dev_addr = &id_priv->id.route.addr.dev_addr;
4011
6266ed6e 4012 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
fa20105e 4013 (net_eq(dev_net(ndev), dev_addr->net)) &&
dd5bdff8 4014 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
aba25a3e
PP		 4015 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4016 ndev->name, &id_priv->id);
dd5bdff8
OG		 4017 work = kzalloc(sizeof *work, GFP_KERNEL);
4018 if (!work)
4019 return -ENOMEM;
4020
4021 INIT_WORK(&work->work, cma_ndev_work_handler);
4022 work->id = id_priv;
4023 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4024 atomic_inc(&id_priv->refcount);
4025 queue_work(cma_wq, &work->work);
4026 }
4027
4028 return 0;
4029}
4030
4031static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
351638e7 4032 void *ptr)
dd5bdff8 4033{
351638e7 4034 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
dd5bdff8
OG		 4035 struct cma_device *cma_dev;
4036 struct rdma_id_private *id_priv;
4037 int ret = NOTIFY_DONE;
4038
dd5bdff8
OG		 4039 if (event != NETDEV_BONDING_FAILOVER)
4040 return NOTIFY_DONE;
4041
4042 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
4043 return NOTIFY_DONE;
4044
4045 mutex_lock(&lock);
4046 list_for_each_entry(cma_dev, &dev_list, list)
4047 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4048 ret = cma_netdev_change(ndev, id_priv);
4049 if (ret)
4050 goto out;
4051 }
4052
4053out:
4054 mutex_unlock(&lock);
4055 return ret;
4056}
4057
4058static struct notifier_block cma_nb = {
4059 .notifier_call = cma_netdev_callback
4060};
4061
e51060f0
SH		 4062static void cma_add_one(struct ib_device *device)
4063{
4064 struct cma_device *cma_dev;
4065 struct rdma_id_private *id_priv;
045959db
MB		 4066 unsigned int i;
4067 unsigned long supported_gids = 0;
e51060f0
SH		 4068
4069 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4070 if (!cma_dev)
4071 return;
4072
4073 cma_dev->device = device;
045959db
MB		 4074 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4075 sizeof(*cma_dev->default_gid_type),
4076 GFP_KERNEL);
4077 if (!cma_dev->default_gid_type) {
4078 kfree(cma_dev);
4079 return;
4080 }
4081 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4082 supported_gids = roce_gid_type_mask_support(device, i);
4083 WARN_ON(!supported_gids);
4084 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4085 find_first_bit(&supported_gids, BITS_PER_LONG);
4086 }
e51060f0
SH		 4087
4088 init_completion(&cma_dev->comp);
4089 atomic_set(&cma_dev->refcount, 1);
4090 INIT_LIST_HEAD(&cma_dev->id_list);
4091 ib_set_client_data(device, &cma_client, cma_dev);
4092
4093 mutex_lock(&lock);
4094 list_add_tail(&cma_dev->list, &dev_list);
4095 list_for_each_entry(id_priv, &listen_any_list, list)
4096 cma_listen_on_dev(id_priv, cma_dev);
4097 mutex_unlock(&lock);
e51060f0
SH		 4098}
4099
4100static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4101{
a1b1b61f 4102 struct rdma_cm_event event;
550e5ca7 4103 enum rdma_cm_state state;
de910bd9 4104 int ret = 0;
e51060f0
SH		 4105
4106 /* Record that we want to remove the device */
550e5ca7
NM		 4107 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4108 if (state == RDMA_CM_DESTROYING)
e51060f0
SH		 4109 return 0;
4110
4111 cma_cancel_operation(id_priv, state);
de910bd9 4112 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 4113
4114 /* Check for destruction from another callback. */
550e5ca7 4115 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
de910bd9 4116 goto out;
e51060f0 4117
a1b1b61f
SH		 4118 memset(&event, 0, sizeof event);
4119 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 4120 ret = id_priv->id.event_handler(&id_priv->id, &event);
4121out:
4122 mutex_unlock(&id_priv->handler_mutex);
4123 return ret;
e51060f0
SH		 4124}
4125
4126static void cma_process_remove(struct cma_device *cma_dev)
4127{
e51060f0
SH		 4128 struct rdma_id_private *id_priv;
4129 int ret;
4130
e51060f0
SH		 4131 mutex_lock(&lock);
4132 while (!list_empty(&cma_dev->id_list)) {
4133 id_priv = list_entry(cma_dev->id_list.next,
4134 struct rdma_id_private, list);
4135
d02d1f53 4136 list_del(&id_priv->listen_list);
94de178a 4137 list_del_init(&id_priv->list);
e51060f0
SH		 4138 atomic_inc(&id_priv->refcount);
4139 mutex_unlock(&lock);
4140
d02d1f53 4141 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 4142 cma_deref_id(id_priv);
4143 if (ret)
4144 rdma_destroy_id(&id_priv->id);
4145
4146 mutex_lock(&lock);
4147 }
4148 mutex_unlock(&lock);
4149
4150 cma_deref_dev(cma_dev);
4151 wait_for_completion(&cma_dev->comp);
4152}
4153
7c1eb45a 4154static void cma_remove_one(struct ib_device *device, void *client_data)
e51060f0 4155{
7c1eb45a 4156 struct cma_device *cma_dev = client_data;
e51060f0 4157
e51060f0
SH		 4158 if (!cma_dev)
4159 return;
4160
4161 mutex_lock(&lock);
4162 list_del(&cma_dev->list);
4163 mutex_unlock(&lock);
4164
4165 cma_process_remove(cma_dev);
045959db 4166 kfree(cma_dev->default_gid_type);
e51060f0
SH		 4167 kfree(cma_dev);
4168}
4169
753f618a
NM		 4170static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4171{
4172 struct nlmsghdr *nlh;
4173 struct rdma_cm_id_stats *id_stats;
4174 struct rdma_id_private *id_priv;
4175 struct rdma_cm_id *id = NULL;
4176 struct cma_device *cma_dev;
4177 int i_dev = 0, i_id = 0;
4178
4179 /*
4180 * We export all of the IDs as a sequence of messages. Each
4181 * ID gets its own netlink message.
4182 */
4183 mutex_lock(&lock);
4184
4185 list_for_each_entry(cma_dev, &dev_list, list) {
4186 if (i_dev < cb->args[0]) {
4187 i_dev++;
4188 continue;
4189 }
4190
4191 i_id = 0;
4192 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4193 if (i_id < cb->args[1]) {
4194 i_id++;
4195 continue;
4196 }
4197
4198 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4199 sizeof *id_stats, RDMA_NL_RDMA_CM,
30dc5e63
TN		 4200 RDMA_NL_RDMA_CM_ID_STATS,
4201 NLM_F_MULTI);
753f618a
NM		 4202 if (!id_stats)
4203 goto out;
4204
4205 memset(id_stats, 0, sizeof *id_stats);
4206 id = &id_priv->id;
4207 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4208 id_stats->port_num = id->port_num;
4209 id_stats->bound_dev_if =
4210 id->route.addr.dev_addr.bound_dev_if;
4211
ce117ffa
SH		 4212 if (ibnl_put_attr(skb, nlh,
4213 rdma_addr_size(cma_src_addr(id_priv)),
4214 cma_src_addr(id_priv),
4215 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4216 goto out;
4217 if (ibnl_put_attr(skb, nlh,
4218 rdma_addr_size(cma_src_addr(id_priv)),
4219 cma_dst_addr(id_priv),
4220 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4221 goto out;
753f618a 4222
83e9502d 4223 id_stats->pid = id_priv->owner;
753f618a
NM		 4224 id_stats->port_space = id->ps;
4225 id_stats->cm_state = id_priv->state;
4226 id_stats->qp_num = id_priv->qp_num;
4227 id_stats->qp_type = id->qp_type;
4228
4229 i_id++;
4230 }
4231
4232 cb->args[1] = 0;
4233 i_dev++;
4234 }
4235
4236out:
4237 mutex_unlock(&lock);
4238 cb->args[0] = i_dev;
4239 cb->args[1] = i_id;
4240
4241 return skb->len;
4242}
4243
4244static const struct ibnl_client_cbs cma_cb_table[] = {
809d5fc9
G		 4245 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
4246 .module = THIS_MODULE },
753f618a
NM		 4247};
4248
4be74b42
HE		 4249static int cma_init_net(struct net *net)
4250{
4251 struct cma_pernet *pernet = cma_pernet(net);
4252
4253 idr_init(&pernet->tcp_ps);
4254 idr_init(&pernet->udp_ps);
4255 idr_init(&pernet->ipoib_ps);
4256 idr_init(&pernet->ib_ps);
4257
4258 return 0;
4259}
4260
4261static void cma_exit_net(struct net *net)
4262{
4263 struct cma_pernet *pernet = cma_pernet(net);
4264
4265 idr_destroy(&pernet->tcp_ps);
4266 idr_destroy(&pernet->udp_ps);
4267 idr_destroy(&pernet->ipoib_ps);
4268 idr_destroy(&pernet->ib_ps);
4269}
4270
4271static struct pernet_operations cma_pernet_operations = {
4272 .init = cma_init_net,
4273 .exit = cma_exit_net,
4274 .id = &cma_pernet_id,
4275 .size = sizeof(struct cma_pernet),
4276};
4277
716abb1f 4278static int __init cma_init(void)
e51060f0 4279{
5d7220e8 4280 int ret;
227b60f5 4281
c7f743a6 4282 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 4283 if (!cma_wq)
4284 return -ENOMEM;
4285
4be74b42
HE		 4286 ret = register_pernet_subsys(&cma_pernet_operations);
4287 if (ret)
4288 goto err_wq;
4289
c1a0b23b 4290 ib_sa_register_client(&sa_client);
7a118df3 4291 rdma_addr_register_client(&addr_client);
dd5bdff8 4292 register_netdevice_notifier(&cma_nb);
c1a0b23b 4293
e51060f0
SH		 4294 ret = ib_register_client(&cma_client);
4295 if (ret)
4296 goto err;
753f618a
NM		 4297
4298 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
aba25a3e 4299 pr_warn("RDMA CMA: failed to add netlink callback\n");
045959db 4300 cma_configfs_init();
753f618a 4301
e51060f0
SH		 4302 return 0;
4303
4304err:
dd5bdff8 4305 unregister_netdevice_notifier(&cma_nb);
7a118df3 4306 rdma_addr_unregister_client(&addr_client);
c1a0b23b 4307 ib_sa_unregister_client(&sa_client);
4be74b42 4308err_wq:
e51060f0
SH		 4309 destroy_workqueue(cma_wq);
4310 return ret;
4311}
4312
716abb1f 4313static void __exit cma_cleanup(void)
e51060f0 4314{
045959db 4315 cma_configfs_exit();
753f618a 4316 ibnl_remove_client(RDMA_NL_RDMA_CM);
e51060f0 4317 ib_unregister_client(&cma_client);
dd5bdff8 4318 unregister_netdevice_notifier(&cma_nb);
7a118df3 4319 rdma_addr_unregister_client(&addr_client);
c1a0b23b 4320 ib_sa_unregister_client(&sa_client);
4be74b42 4321 unregister_pernet_subsys(&cma_pernet_operations);
e51060f0 4322 destroy_workqueue(cma_wq);
e51060f0
SH		 4323}
4324
4325module_init(cma_init);
4326module_exit(cma_cleanup);
Linux kernel - Deliverables
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