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RDMA/core: Prefix _ib to IB/RoCE specific functions
[linux-2.6-block.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 64#include "core_priv.h"
a3b641af 65#include "cma_priv.h"
218a773f 66
e51060f0
SH		 67MODULE_AUTHOR("Sean Hefty");
68MODULE_DESCRIPTION("Generic RDMA CM Agent");
69MODULE_LICENSE("Dual BSD/GPL");
70
71#define CMA_CM_RESPONSE_TIMEOUT 20
ab15c95a 72#define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
d5bb7599 73#define CMA_MAX_CM_RETRIES 15
dcb3f974 74#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 75#define CMA_IBOE_PACKET_LIFETIME 18
5ab2d89b 76#define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
e51060f0 77
2b1b5b60
SG		 78static const char * const cma_events[] = {
79 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
80 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
81 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
82 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
83 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
84 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
85 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
86 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
87 [RDMA_CM_EVENT_REJECTED] = "rejected",
88 [RDMA_CM_EVENT_ESTABLISHED] = "established",
89 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
90 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
91 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
92 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
93 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
94 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
95};
96
db7489e0 97const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
2b1b5b60
SG		 98{
99 size_t index = event;
100
101 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
102 cma_events[index] : "unrecognized event";
103}
104EXPORT_SYMBOL(rdma_event_msg);
105
77a5db13
SW		 106const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
107 int reason)
108{
109 if (rdma_ib_or_roce(id->device, id->port_num))
110 return ibcm_reject_msg(reason);
111
112 if (rdma_protocol_iwarp(id->device, id->port_num))
113 return iwcm_reject_msg(reason);
114
115 WARN_ON_ONCE(1);
116 return "unrecognized transport";
117}
118EXPORT_SYMBOL(rdma_reject_msg);
119
5042a73d
SW		 120bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
121{
122 if (rdma_ib_or_roce(id->device, id->port_num))
123 return reason == IB_CM_REJ_CONSUMER_DEFINED;
124
125 if (rdma_protocol_iwarp(id->device, id->port_num))
126 return reason == -ECONNREFUSED;
127
128 WARN_ON_ONCE(1);
129 return false;
130}
131EXPORT_SYMBOL(rdma_is_consumer_reject);
132
5f244104
SW		 133const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
134 struct rdma_cm_event *ev, u8 *data_len)
135{
136 const void *p;
137
138 if (rdma_is_consumer_reject(id, ev->status)) {
139 *data_len = ev->param.conn.private_data_len;
140 p = ev->param.conn.private_data;
141 } else {
142 *data_len = 0;
143 p = NULL;
144 }
145 return p;
146}
147EXPORT_SYMBOL(rdma_consumer_reject_data);
148
fbdb0a91
SW		 149/**
150 * rdma_iw_cm_id() - return the iw_cm_id pointer for this cm_id.
151 * @id: Communication Identifier
152 */
153struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
154{
155 struct rdma_id_private *id_priv;
156
157 id_priv = container_of(id, struct rdma_id_private, id);
158 if (id->device->node_type == RDMA_NODE_RNIC)
159 return id_priv->cm_id.iw;
160 return NULL;
161}
162EXPORT_SYMBOL(rdma_iw_cm_id);
163
164/**
165 * rdma_res_to_id() - return the rdma_cm_id pointer for this restrack.
166 * @res: rdma resource tracking entry pointer
167 */
168struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
169{
170 struct rdma_id_private *id_priv =
171 container_of(res, struct rdma_id_private, res);
172
173 return &id_priv->id;
174}
175EXPORT_SYMBOL(rdma_res_to_id);
176
e51060f0 177static void cma_add_one(struct ib_device *device);
7c1eb45a 178static void cma_remove_one(struct ib_device *device, void *client_data);
e51060f0
SH		 179
180static struct ib_client cma_client = {
181 .name = "cma",
182 .add = cma_add_one,
183 .remove = cma_remove_one
184};
185
c1a0b23b 186static struct ib_sa_client sa_client;
e51060f0
SH		 187static LIST_HEAD(dev_list);
188static LIST_HEAD(listen_any_list);
189static DEFINE_MUTEX(lock);
190static struct workqueue_struct *cma_wq;
c7d03a00 191static unsigned int cma_pernet_id;
e51060f0 192
4be74b42
HE		 193struct cma_pernet {
194 struct idr tcp_ps;
195 struct idr udp_ps;
196 struct idr ipoib_ps;
197 struct idr ib_ps;
198};
199
200static struct cma_pernet *cma_pernet(struct net *net)
201{
202 return net_generic(net, cma_pernet_id);
203}
204
2253fc0c 205static struct idr *cma_pernet_idr(struct net *net, enum rdma_ucm_port_space ps)
aac978e1 206{
4be74b42
HE		 207 struct cma_pernet *pernet = cma_pernet(net);
208
aac978e1
HE		 209 switch (ps) {
210 case RDMA_PS_TCP:
4be74b42 211 return &pernet->tcp_ps;
aac978e1 212 case RDMA_PS_UDP:
4be74b42 213 return &pernet->udp_ps;
aac978e1 214 case RDMA_PS_IPOIB:
4be74b42 215 return &pernet->ipoib_ps;
aac978e1 216 case RDMA_PS_IB:
4be74b42 217 return &pernet->ib_ps;
aac978e1
HE		 218 default:
219 return NULL;
220 }
221}
222
e51060f0
SH		 223struct cma_device {
224 struct list_head list;
225 struct ib_device *device;
e51060f0
SH		 226 struct completion comp;
227 atomic_t refcount;
228 struct list_head id_list;
045959db 229 enum ib_gid_type *default_gid_type;
89052d78 230 u8 *default_roce_tos;
e51060f0
SH		 231};
232
e51060f0 233struct rdma_bind_list {
2253fc0c 234 enum rdma_ucm_port_space ps;
e51060f0
SH		 235 struct hlist_head owners;
236 unsigned short port;
237};
238
ab15c95a
AV		 239struct class_port_info_context {
240 struct ib_class_port_info *class_port_info;
241 struct ib_device *device;
242 struct completion done;
243 struct ib_sa_query *sa_query;
244 u8 port_num;
245};
246
2253fc0c 247static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
aac978e1
HE		 248 struct rdma_bind_list *bind_list, int snum)
249{
4be74b42 250 struct idr *idr = cma_pernet_idr(net, ps);
aac978e1
HE		 251
252 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
253}
254
4be74b42 255static struct rdma_bind_list *cma_ps_find(struct net *net,
2253fc0c 256 enum rdma_ucm_port_space ps, int snum)
aac978e1 257{
4be74b42 258 struct idr *idr = cma_pernet_idr(net, ps);
aac978e1
HE		 259
260 return idr_find(idr, snum);
261}
262
2253fc0c
SW		 263static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
264 int snum)
aac978e1 265{
4be74b42 266 struct idr *idr = cma_pernet_idr(net, ps);
aac978e1
HE		 267
268 idr_remove(idr, snum);
269}
270
68602120
SH		 271enum {
272 CMA_OPTION_AFONLY,
273};
274
218a773f
MB		 275void cma_ref_dev(struct cma_device *cma_dev)
276{
277 atomic_inc(&cma_dev->refcount);
278}
279
045959db
MB		 280struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
281 void *cookie)
282{
283 struct cma_device *cma_dev;
284 struct cma_device *found_cma_dev = NULL;
285
286 mutex_lock(&lock);
287
288 list_for_each_entry(cma_dev, &dev_list, list)
289 if (filter(cma_dev->device, cookie)) {
290 found_cma_dev = cma_dev;
291 break;
292 }
293
294 if (found_cma_dev)
295 cma_ref_dev(found_cma_dev);
296 mutex_unlock(&lock);
297 return found_cma_dev;
298}
299
300int cma_get_default_gid_type(struct cma_device *cma_dev,
301 unsigned int port)
302{
24dc831b 303 if (!rdma_is_port_valid(cma_dev->device, port))
045959db
MB		 304 return -EINVAL;
305
306 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
307}
308
309int cma_set_default_gid_type(struct cma_device *cma_dev,
310 unsigned int port,
311 enum ib_gid_type default_gid_type)
312{
313 unsigned long supported_gids;
314
24dc831b 315 if (!rdma_is_port_valid(cma_dev->device, port))
045959db
MB		 316 return -EINVAL;
317
318 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
319
320 if (!(supported_gids & 1 << default_gid_type))
321 return -EINVAL;
322
323 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
324 default_gid_type;
325
326 return 0;
327}
328
89052d78
MD		 329int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
330{
331 if (!rdma_is_port_valid(cma_dev->device, port))
332 return -EINVAL;
333
334 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
335}
336
337int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
338 u8 default_roce_tos)
339{
340 if (!rdma_is_port_valid(cma_dev->device, port))
341 return -EINVAL;
342
343 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
344 default_roce_tos;
345
346 return 0;
347}
045959db
MB		 348struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
349{
350 return cma_dev->device;
351}
352
e51060f0
SH		 353/*
354 * Device removal can occur at anytime, so we need extra handling to
355 * serialize notifying the user of device removal with other callbacks.
356 * We do this by disabling removal notification while a callback is in process,
357 * and reporting it after the callback completes.
358 */
e51060f0 359
c8f6a362
SH		 360struct cma_multicast {
361 struct rdma_id_private *id_priv;
362 union {
363 struct ib_sa_multicast *ib;
364 } multicast;
365 struct list_head list;
366 void *context;
3f446754 367 struct sockaddr_storage addr;
3c86aa70 368 struct kref mcref;
ab15c95a 369 u8 join_state;
c8f6a362
SH		 370};
371
e51060f0
SH		 372struct cma_work {
373 struct work_struct work;
374 struct rdma_id_private *id;
550e5ca7
NM		 375 enum rdma_cm_state old_state;
376 enum rdma_cm_state new_state;
e51060f0
SH		 377 struct rdma_cm_event event;
378};
379
dd5bdff8
OG		 380struct cma_ndev_work {
381 struct work_struct work;
382 struct rdma_id_private *id;
383 struct rdma_cm_event event;
384};
385
3c86aa70
EC		 386struct iboe_mcast_work {
387 struct work_struct work;
388 struct rdma_id_private *id;
389 struct cma_multicast *mc;
390};
391
e51060f0
SH		 392union cma_ip_addr {
393 struct in6_addr ip6;
394 struct {
1b90c137
AV		 395 __be32 pad[3];
396 __be32 addr;
e51060f0
SH		 397 } ip4;
398};
399
400struct cma_hdr {
401 u8 cma_version;
402 u8 ip_version; /* IP version: 7:4 */
1b90c137 403 __be16 port;
e51060f0
SH		 404 union cma_ip_addr src_addr;
405 union cma_ip_addr dst_addr;
406};
407
e51060f0 408#define CMA_VERSION 0x00
e51060f0 409
4c21b5bc 410struct cma_req_info {
2918c1a9
PP		 411 struct sockaddr_storage listen_addr_storage;
412 struct sockaddr_storage src_addr_storage;
4c21b5bc 413 struct ib_device *device;
4c21b5bc
HE		 414 union ib_gid local_gid;
415 __be64 service_id;
05e0b86c
PP		 416 int port;
417 bool has_gid;
4c21b5bc 418 u16 pkey;
4c21b5bc
HE		 419};
420
550e5ca7 421static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
e51060f0
SH		 422{
423 unsigned long flags;
424 int ret;
425
426 spin_lock_irqsave(&id_priv->lock, flags);
427 ret = (id_priv->state == comp);
428 spin_unlock_irqrestore(&id_priv->lock, flags);
429 return ret;
430}
431
432static int cma_comp_exch(struct rdma_id_private *id_priv,
550e5ca7 433 enum rdma_cm_state comp, enum rdma_cm_state exch)
e51060f0
SH		 434{
435 unsigned long flags;
436 int ret;
437
438 spin_lock_irqsave(&id_priv->lock, flags);
439 if ((ret = (id_priv->state == comp)))
440 id_priv->state = exch;
441 spin_unlock_irqrestore(&id_priv->lock, flags);
442 return ret;
443}
444
550e5ca7
NM		 445static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
446 enum rdma_cm_state exch)
e51060f0
SH		 447{
448 unsigned long flags;
550e5ca7 449 enum rdma_cm_state old;
e51060f0
SH		 450
451 spin_lock_irqsave(&id_priv->lock, flags);
452 old = id_priv->state;
453 id_priv->state = exch;
454 spin_unlock_irqrestore(&id_priv->lock, flags);
455 return old;
456}
457
4c21b5bc 458static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
e51060f0
SH		 459{
460 return hdr->ip_version >> 4;
461}
462
463static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
464{
465 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
466}
467
bee3c3c9 468static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
e51060f0 469{
bee3c3c9
MS		 470 struct in_device *in_dev = NULL;
471
472 if (ndev) {
473 rtnl_lock();
474 in_dev = __in_dev_get_rtnl(ndev);
475 if (in_dev) {
476 if (join)
477 ip_mc_inc_group(in_dev,
478 *(__be32 *)(mgid->raw + 12));
479 else
480 ip_mc_dec_group(in_dev,
481 *(__be32 *)(mgid->raw + 12));
482 }
483 rtnl_unlock();
484 }
485 return (in_dev) ? 0 : -ENODEV;
486}
487
045959db
MB		 488static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
489 struct cma_device *cma_dev)
e51060f0 490{
218a773f 491 cma_ref_dev(cma_dev);
e51060f0
SH		 492 id_priv->cma_dev = cma_dev;
493 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 494 id_priv->id.route.addr.dev_addr.transport =
495 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0 496 list_add_tail(&id_priv->list, &cma_dev->id_list);
00313983 497 rdma_restrack_add(&id_priv->res);
e51060f0
SH		 498}
499
045959db
MB		 500static void cma_attach_to_dev(struct rdma_id_private *id_priv,
501 struct cma_device *cma_dev)
502{
503 _cma_attach_to_dev(id_priv, cma_dev);
504 id_priv->gid_type =
505 cma_dev->default_gid_type[id_priv->id.port_num -
506 rdma_start_port(cma_dev->device)];
507}
508
218a773f 509void cma_deref_dev(struct cma_device *cma_dev)
e51060f0
SH		 510{
511 if (atomic_dec_and_test(&cma_dev->refcount))
512 complete(&cma_dev->comp);
513}
514
3c86aa70
EC		 515static inline void release_mc(struct kref *kref)
516{
517 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
518
519 kfree(mc->multicast.ib);
520 kfree(mc);
521}
522
a396d43a 523static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 524{
a396d43a 525 mutex_lock(&lock);
e51060f0
SH		 526 list_del(&id_priv->list);
527 cma_deref_dev(id_priv->cma_dev);
528 id_priv->cma_dev = NULL;
a396d43a 529 mutex_unlock(&lock);
e51060f0
SH		 530}
531
f4753834
SH		 532static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
533{
534 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
535}
536
537static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
538{
539 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
540}
541
542static inline unsigned short cma_family(struct rdma_id_private *id_priv)
543{
544 return id_priv->id.route.addr.src_addr.ss_family;
545}
546
5c438135 547static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
c8f6a362
SH		 548{
549 struct ib_sa_mcmember_rec rec;
550 int ret = 0;
551
5c438135
SH		 552 if (id_priv->qkey) {
553 if (qkey && id_priv->qkey != qkey)
554 return -EINVAL;
d2ca39f2 555 return 0;
5c438135
SH		 556 }
557
558 if (qkey) {
559 id_priv->qkey = qkey;
560 return 0;
561 }
d2ca39f2
YE		 562
563 switch (id_priv->id.ps) {
c8f6a362 564 case RDMA_PS_UDP:
5c438135 565 case RDMA_PS_IB:
d2ca39f2 566 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 567 break;
568 case RDMA_PS_IPOIB:
d2ca39f2
YE		 569 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
570 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
571 id_priv->id.port_num, &rec.mgid,
572 &rec);
573 if (!ret)
574 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 575 break;
576 default:
577 break;
578 }
579 return ret;
580}
581
680f920a
SH		 582static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
583{
584 dev_addr->dev_type = ARPHRD_INFINIBAND;
585 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
586 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
587}
588
589static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
590{
591 int ret;
592
593 if (addr->sa_family != AF_IB) {
575c7e58 594 ret = rdma_translate_ip(addr, dev_addr);
680f920a
SH		 595 } else {
596 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
597 ret = 0;
598 }
599
600 return ret;
601}
602
4ed13a5f
PP		 603static const struct ib_gid_attr *
604cma_validate_port(struct ib_device *device, u8 port,
605 enum ib_gid_type gid_type,
606 union ib_gid *gid,
607 struct rdma_id_private *id_priv)
7c11147d 608{
2493a57b
PP		 609 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
610 int bound_if_index = dev_addr->bound_dev_if;
4ed13a5f 611 const struct ib_gid_attr *sgid_attr;
2493a57b 612 int dev_type = dev_addr->dev_type;
abae1b71 613 struct net_device *ndev = NULL;
7c11147d
MW		 614
615 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
4ed13a5f 616 return ERR_PTR(-ENODEV);
7c11147d
MW		 617
618 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
4ed13a5f 619 return ERR_PTR(-ENODEV);
7c11147d 620
00db63c1 621 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
66c74d74 622 ndev = dev_get_by_index(dev_addr->net, bound_if_index);
00db63c1 623 if (!ndev)
4ed13a5f 624 return ERR_PTR(-ENODEV);
00db63c1 625 } else {
045959db 626 gid_type = IB_GID_TYPE_IB;
00db63c1 627 }
abae1b71 628
4ed13a5f 629 sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
abae1b71
MB		 630 if (ndev)
631 dev_put(ndev);
4ed13a5f
PP		 632 return sgid_attr;
633}
7c11147d 634
4ed13a5f
PP		 635static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
636 const struct ib_gid_attr *sgid_attr)
637{
638 WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
639 id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
7c11147d
MW		 640}
641
be9130cc 642static int cma_acquire_dev(struct rdma_id_private *id_priv,
e7ff98ae 643 const struct rdma_id_private *listen_id_priv)
e51060f0 644{
c8f6a362 645 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4ed13a5f 646 const struct ib_gid_attr *sgid_attr;
e51060f0 647 struct cma_device *cma_dev;
7c11147d 648 union ib_gid gid, iboe_gid, *gidp;
4ed13a5f 649 enum ib_gid_type gid_type;
e51060f0 650 int ret = -ENODEV;
7c11147d 651 u8 port;
e51060f0 652
7c11147d 653 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
2efdd6a0
MS		 654 id_priv->id.ps == RDMA_PS_IPOIB)
655 return -EINVAL;
656
a396d43a 657 mutex_lock(&lock);
7b85627b
MS		 658 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
659 &iboe_gid);
660
3c86aa70
EC		 661 memcpy(&gid, dev_addr->src_dev_addr +
662 rdma_addr_gid_offset(dev_addr), sizeof gid);
7c11147d
MW		 663
664 if (listen_id_priv) {
be9130cc
DL		 665 cma_dev = listen_id_priv->cma_dev;
666 port = listen_id_priv->id.port_num;
5d9fb044 667 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d 668 &iboe_gid : &gid;
79d684f0 669 gid_type = listen_id_priv->gid_type;
4ed13a5f
PP		 670 sgid_attr = cma_validate_port(cma_dev->device, port,
671 gid_type, gidp, id_priv);
672 if (!IS_ERR(sgid_attr)) {
7c11147d 673 id_priv->id.port_num = port;
4ed13a5f
PP		 674 cma_bind_sgid_attr(id_priv, sgid_attr);
675 ret = 0;
be9130cc
DL		 676 goto out;
677 }
678 }
7c11147d 679
e51060f0 680 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70 681 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
be9130cc
DL		 682 if (listen_id_priv &&
683 listen_id_priv->cma_dev == cma_dev &&
684 listen_id_priv->id.port_num == port)
685 continue;
7c11147d 686
5d9fb044 687 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d 688 &iboe_gid : &gid;
79d684f0 689 gid_type = cma_dev->default_gid_type[port - 1];
4ed13a5f
PP		 690 sgid_attr = cma_validate_port(cma_dev->device, port,
691 gid_type, gidp, id_priv);
692 if (!IS_ERR(sgid_attr)) {
7c11147d 693 id_priv->id.port_num = port;
4ed13a5f
PP		 694 cma_bind_sgid_attr(id_priv, sgid_attr);
695 ret = 0;
7c11147d 696 goto out;
3c86aa70 697 }
e51060f0
SH		 698 }
699 }
3c86aa70
EC		 700
701out:
702 if (!ret)
703 cma_attach_to_dev(id_priv, cma_dev);
704
a396d43a 705 mutex_unlock(&lock);
e51060f0
SH		 706 return ret;
707}
708
f17df3b0
SH		 709/*
710 * Select the source IB device and address to reach the destination IB address.
711 */
712static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
713{
714 struct cma_device *cma_dev, *cur_dev;
715 struct sockaddr_ib *addr;
716 union ib_gid gid, sgid, *dgid;
717 u16 pkey, index;
8fb488d7 718 u8 p;
93b1f29d 719 enum ib_port_state port_state;
f17df3b0
SH		 720 int i;
721
722 cma_dev = NULL;
723 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
724 dgid = (union ib_gid *) &addr->sib_addr;
725 pkey = ntohs(addr->sib_pkey);
726
727 list_for_each_entry(cur_dev, &dev_list, list) {
f17df3b0 728 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
30a74ef4 729 if (!rdma_cap_af_ib(cur_dev->device, p))
fef60902
MW		 730 continue;
731
f17df3b0
SH		 732 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
733 continue;
734
93b1f29d
JW		 735 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
736 continue;
1dfce294
PP		 737 for (i = 0; !rdma_query_gid(cur_dev->device,
738 p, i, &gid);
55ee3ab2 739 i++) {
f17df3b0
SH		 740 if (!memcmp(&gid, dgid, sizeof(gid))) {
741 cma_dev = cur_dev;
742 sgid = gid;
8fb488d7 743 id_priv->id.port_num = p;
f17df3b0
SH		 744 goto found;
745 }
746
747 if (!cma_dev && (gid.global.subnet_prefix ==
93b1f29d
JW		 748 dgid->global.subnet_prefix) &&
749 port_state == IB_PORT_ACTIVE) {
f17df3b0
SH		 750 cma_dev = cur_dev;
751 sgid = gid;
8fb488d7 752 id_priv->id.port_num = p;
f17df3b0
SH		 753 }
754 }
755 }
756 }
757
758 if (!cma_dev)
759 return -ENODEV;
760
761found:
762 cma_attach_to_dev(id_priv, cma_dev);
f17df3b0
SH		 763 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
764 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
765 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
766 return 0;
767}
768
e51060f0
SH		 769static void cma_deref_id(struct rdma_id_private *id_priv)
770{
771 if (atomic_dec_and_test(&id_priv->refcount))
772 complete(&id_priv->comp);
773}
774
00313983
SW		 775struct rdma_cm_id *__rdma_create_id(struct net *net,
776 rdma_cm_event_handler event_handler,
2253fc0c 777 void *context, enum rdma_ucm_port_space ps,
00313983 778 enum ib_qp_type qp_type, const char *caller)
e51060f0
SH		 779{
780 struct rdma_id_private *id_priv;
781
782 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
783 if (!id_priv)
784 return ERR_PTR(-ENOMEM);
785
00313983
SW		 786 if (caller)
787 id_priv->res.kern_name = caller;
788 else
789 rdma_restrack_set_task(&id_priv->res, current);
e11fef9f 790 id_priv->res.type = RDMA_RESTRACK_CM_ID;
550e5ca7 791 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 792 id_priv->id.context = context;
793 id_priv->id.event_handler = event_handler;
794 id_priv->id.ps = ps;
b26f9b99 795 id_priv->id.qp_type = qp_type;
89052d78 796 id_priv->tos_set = false;
79d684f0 797 id_priv->gid_type = IB_GID_TYPE_IB;
e51060f0 798 spin_lock_init(&id_priv->lock);
c5483388 799 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 800 init_completion(&id_priv->comp);
801 atomic_set(&id_priv->refcount, 1);
de910bd9 802 mutex_init(&id_priv->handler_mutex);
e51060f0 803 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 804 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0 805 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
fa20105e 806 id_priv->id.route.addr.dev_addr.net = get_net(net);
23a9cd2a 807 id_priv->seq_num &= 0x00ffffff;
e51060f0
SH		 808
809 return &id_priv->id;
810}
00313983 811EXPORT_SYMBOL(__rdma_create_id);
e51060f0 812
c8f6a362 813static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 814{
815 struct ib_qp_attr qp_attr;
c8f6a362 816 int qp_attr_mask, ret;
e51060f0 817
c8f6a362
SH		 818 qp_attr.qp_state = IB_QPS_INIT;
819 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 820 if (ret)
821 return ret;
822
c8f6a362
SH		 823 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
824 if (ret)
825 return ret;
826
827 qp_attr.qp_state = IB_QPS_RTR;
828 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
829 if (ret)
830 return ret;
831
832 qp_attr.qp_state = IB_QPS_RTS;
833 qp_attr.sq_psn = 0;
834 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
835
836 return ret;
e51060f0
SH		 837}
838
c8f6a362 839static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 840{
841 struct ib_qp_attr qp_attr;
c8f6a362 842 int qp_attr_mask, ret;
07ebafba
TT		 843
844 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 845 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
846 if (ret)
847 return ret;
07ebafba 848
c8f6a362 849 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 850}
851
e51060f0
SH		 852int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
853 struct ib_qp_init_attr *qp_init_attr)
854{
855 struct rdma_id_private *id_priv;
856 struct ib_qp *qp;
857 int ret;
858
859 id_priv = container_of(id, struct rdma_id_private, id);
860 if (id->device != pd->device)
861 return -EINVAL;
862
0691a286 863 qp_init_attr->port_num = id->port_num;
e51060f0
SH		 864 qp = ib_create_qp(pd, qp_init_attr);
865 if (IS_ERR(qp))
866 return PTR_ERR(qp);
867
b26f9b99 868 if (id->qp_type == IB_QPT_UD)
c8f6a362
SH		 869 ret = cma_init_ud_qp(id_priv, qp);
870 else
871 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 872 if (ret)
873 goto err;
874
875 id->qp = qp;
876 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 877 id_priv->srq = (qp->srq != NULL);
878 return 0;
879err:
880 ib_destroy_qp(qp);
881 return ret;
882}
883EXPORT_SYMBOL(rdma_create_qp);
884
885void rdma_destroy_qp(struct rdma_cm_id *id)
886{
c5483388
SH		 887 struct rdma_id_private *id_priv;
888
889 id_priv = container_of(id, struct rdma_id_private, id);
890 mutex_lock(&id_priv->qp_mutex);
891 ib_destroy_qp(id_priv->id.qp);
892 id_priv->id.qp = NULL;
893 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 894}
895EXPORT_SYMBOL(rdma_destroy_qp);
896
5851bb89
SH		 897static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
898 struct rdma_conn_param *conn_param)
e51060f0
SH		 899{
900 struct ib_qp_attr qp_attr;
901 int qp_attr_mask, ret;
902
c5483388
SH		 903 mutex_lock(&id_priv->qp_mutex);
904 if (!id_priv->id.qp) {
905 ret = 0;
906 goto out;
907 }
e51060f0
SH		 908
909 /* Need to update QP attributes from default values. */
910 qp_attr.qp_state = IB_QPS_INIT;
c5483388 911 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 912 if (ret)
c5483388 913 goto out;
e51060f0 914
c5483388 915 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 916 if (ret)
c5483388 917 goto out;
e51060f0
SH		 918
919 qp_attr.qp_state = IB_QPS_RTR;
c5483388 920 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 921 if (ret)
c5483388 922 goto out;
e51060f0 923
fef60902
MW		 924 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
925
5851bb89
SH		 926 if (conn_param)
927 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 928 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
929out:
930 mutex_unlock(&id_priv->qp_mutex);
931 return ret;
e51060f0
SH		 932}
933
5851bb89
SH		 934static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
935 struct rdma_conn_param *conn_param)
e51060f0
SH		 936{
937 struct ib_qp_attr qp_attr;
938 int qp_attr_mask, ret;
939
c5483388
SH		 940 mutex_lock(&id_priv->qp_mutex);
941 if (!id_priv->id.qp) {
942 ret = 0;
943 goto out;
944 }
e51060f0
SH		 945
946 qp_attr.qp_state = IB_QPS_RTS;
c5483388 947 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 948 if (ret)
c5483388 949 goto out;
e51060f0 950
5851bb89
SH		 951 if (conn_param)
952 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 953 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
954out:
955 mutex_unlock(&id_priv->qp_mutex);
956 return ret;
e51060f0
SH		 957}
958
c5483388 959static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 960{
961 struct ib_qp_attr qp_attr;
c5483388 962 int ret;
e51060f0 963
c5483388
SH		 964 mutex_lock(&id_priv->qp_mutex);
965 if (!id_priv->id.qp) {
966 ret = 0;
967 goto out;
968 }
e51060f0
SH		 969
970 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 971 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
972out:
973 mutex_unlock(&id_priv->qp_mutex);
974 return ret;
e51060f0
SH		 975}
976
c8f6a362
SH		 977static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
978 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
979{
980 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
981 int ret;
3c86aa70
EC		 982 u16 pkey;
983
227128fc 984 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
3c86aa70 985 pkey = 0xffff;
fef60902
MW		 986 else
987 pkey = ib_addr_get_pkey(dev_addr);
c8f6a362
SH		 988
989 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 990 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 991 if (ret)
992 return ret;
993
994 qp_attr->port_num = id_priv->id.port_num;
995 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
996
b26f9b99 997 if (id_priv->id.qp_type == IB_QPT_UD) {
5c438135 998 ret = cma_set_qkey(id_priv, 0);
d2ca39f2
YE		 999 if (ret)
1000 return ret;
1001
c8f6a362
SH		 1002 qp_attr->qkey = id_priv->qkey;
1003 *qp_attr_mask |= IB_QP_QKEY;
1004 } else {
1005 qp_attr->qp_access_flags = 0;
1006 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1007 }
1008 return 0;
1009}
1010
e51060f0
SH		 1011int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1012 int *qp_attr_mask)
1013{
1014 struct rdma_id_private *id_priv;
c8f6a362 1015 int ret = 0;
e51060f0
SH		 1016
1017 id_priv = container_of(id, struct rdma_id_private, id);
72219cea 1018 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 1019 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 1020 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1021 else
1022 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1023 qp_attr_mask);
dd5f03be 1024
e51060f0
SH		 1025 if (qp_attr->qp_state == IB_QPS_RTR)
1026 qp_attr->rq_psn = id_priv->seq_num;
04215330 1027 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
c8f6a362 1028 if (!id_priv->cm_id.iw) {
8f076531 1029 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 1030 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1031 } else
1032 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1033 qp_attr_mask);
a62ab66b
IM		 1034 qp_attr->port_num = id_priv->id.port_num;
1035 *qp_attr_mask |= IB_QP_PORT;
21655afc 1036 } else
e51060f0 1037 ret = -ENOSYS;
e51060f0
SH		 1038
1039 return ret;
1040}
1041EXPORT_SYMBOL(rdma_init_qp_attr);
1042
ca3a8ace 1043static inline bool cma_zero_addr(const struct sockaddr *addr)
e51060f0 1044{
2e2d190c
SH		 1045 switch (addr->sa_family) {
1046 case AF_INET:
1047 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1048 case AF_INET6:
ca3a8ace 1049 return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
2e2d190c 1050 case AF_IB:
ca3a8ace 1051 return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
2e2d190c 1052 default:
ca3a8ace 1053 return false;
e51060f0
SH		 1054 }
1055}
1056
ca3a8ace 1057static inline bool cma_loopback_addr(const struct sockaddr *addr)
e51060f0 1058{
2e2d190c
SH		 1059 switch (addr->sa_family) {
1060 case AF_INET:
ca3a8ace
PP		 1061 return ipv4_is_loopback(
1062 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
2e2d190c 1063 case AF_INET6:
ca3a8ace
PP		 1064 return ipv6_addr_loopback(
1065 &((struct sockaddr_in6 *)addr)->sin6_addr);
2e2d190c 1066 case AF_IB:
ca3a8ace
PP		 1067 return ib_addr_loopback(
1068 &((struct sockaddr_ib *)addr)->sib_addr);
2e2d190c 1069 default:
ca3a8ace 1070 return false;
2e2d190c 1071 }
e51060f0
SH		 1072}
1073
ca3a8ace 1074static inline bool cma_any_addr(const struct sockaddr *addr)
e51060f0
SH		 1075{
1076 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1077}
1078
43b752da
HS		 1079static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1080{
1081 if (src->sa_family != dst->sa_family)
1082 return -1;
1083
1084 switch (src->sa_family) {
1085 case AF_INET:
1086 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1087 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2e2d190c 1088 case AF_INET6:
43b752da
HS		 1089 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1090 &((struct sockaddr_in6 *) dst)->sin6_addr);
2e2d190c
SH		 1091 default:
1092 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1093 &((struct sockaddr_ib *) dst)->sib_addr);
43b752da
HS		 1094 }
1095}
1096
2df7dba8 1097static __be16 cma_port(const struct sockaddr *addr)
628e5f6d 1098{
58afdcb7
SH		 1099 struct sockaddr_ib *sib;
1100
1101 switch (addr->sa_family) {
1102 case AF_INET:
628e5f6d 1103 return ((struct sockaddr_in *) addr)->sin_port;
58afdcb7 1104 case AF_INET6:
628e5f6d 1105 return ((struct sockaddr_in6 *) addr)->sin6_port;
58afdcb7
SH		 1106 case AF_IB:
1107 sib = (struct sockaddr_ib *) addr;
1108 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1109 be64_to_cpu(sib->sib_sid_mask)));
1110 default:
1111 return 0;
1112 }
628e5f6d
SH		 1113}
1114
2df7dba8 1115static inline int cma_any_port(const struct sockaddr *addr)
e51060f0 1116{
628e5f6d 1117 return !cma_port(addr);
e51060f0
SH		 1118}
1119
0c505f70
HE		 1120static void cma_save_ib_info(struct sockaddr *src_addr,
1121 struct sockaddr *dst_addr,
e7ff98ae
PP		 1122 const struct rdma_cm_id *listen_id,
1123 const struct sa_path_rec *path)
e51060f0 1124{
fbaa1a6d
SH		 1125 struct sockaddr_ib *listen_ib, *ib;
1126
1127 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
0c505f70
HE		 1128 if (src_addr) {
1129 ib = (struct sockaddr_ib *)src_addr;
1130 ib->sib_family = AF_IB;
1131 if (path) {
1132 ib->sib_pkey = path->pkey;
1133 ib->sib_flowinfo = path->flow_label;
1134 memcpy(&ib->sib_addr, &path->sgid, 16);
d3957b86 1135 ib->sib_sid = path->service_id;
0c505f70
HE		 1136 ib->sib_scope_id = 0;
1137 } else {
1138 ib->sib_pkey = listen_ib->sib_pkey;
1139 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1140 ib->sib_addr = listen_ib->sib_addr;
1141 ib->sib_sid = listen_ib->sib_sid;
1142 ib->sib_scope_id = listen_ib->sib_scope_id;
1143 }
1144 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
c07678bb 1145 }
0c505f70
HE		 1146 if (dst_addr) {
1147 ib = (struct sockaddr_ib *)dst_addr;
1148 ib->sib_family = AF_IB;
1149 if (path) {
1150 ib->sib_pkey = path->pkey;
1151 ib->sib_flowinfo = path->flow_label;
1152 memcpy(&ib->sib_addr, &path->dgid, 16);
1153 }
c07678bb 1154 }
fbaa1a6d 1155}
e51060f0 1156
c50e90d0
AB		 1157static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1158 struct sockaddr_in *dst_addr,
0c505f70
HE		 1159 struct cma_hdr *hdr,
1160 __be16 local_port)
fbaa1a6d 1161{
0c505f70 1162 if (src_addr) {
c50e90d0
AB		 1163 *src_addr = (struct sockaddr_in) {
1164 .sin_family = AF_INET,
1165 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1166 .sin_port = local_port,
1167 };
0c505f70 1168 }
fbaa1a6d 1169
0c505f70 1170 if (dst_addr) {
c50e90d0
AB		 1171 *dst_addr = (struct sockaddr_in) {
1172 .sin_family = AF_INET,
1173 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1174 .sin_port = hdr->port,
1175 };
0c505f70 1176 }
e51060f0
SH		 1177}
1178
c50e90d0
AB		 1179static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1180 struct sockaddr_in6 *dst_addr,
0c505f70
HE		 1181 struct cma_hdr *hdr,
1182 __be16 local_port)
e51060f0 1183{
0c505f70 1184 if (src_addr) {
c50e90d0
AB		 1185 *src_addr = (struct sockaddr_in6) {
1186 .sin6_family = AF_INET6,
1187 .sin6_addr = hdr->dst_addr.ip6,
1188 .sin6_port = local_port,
1189 };
0c505f70 1190 }
fbaa1a6d 1191
0c505f70 1192 if (dst_addr) {
c50e90d0
AB		 1193 *dst_addr = (struct sockaddr_in6) {
1194 .sin6_family = AF_INET6,
1195 .sin6_addr = hdr->src_addr.ip6,
1196 .sin6_port = hdr->port,
1197 };
0c505f70 1198 }
fbaa1a6d
SH		 1199}
1200
0c505f70 1201static u16 cma_port_from_service_id(__be64 service_id)
fbaa1a6d 1202{
0c505f70
HE		 1203 return (u16)be64_to_cpu(service_id);
1204}
fbaa1a6d 1205
0c505f70
HE		 1206static int cma_save_ip_info(struct sockaddr *src_addr,
1207 struct sockaddr *dst_addr,
e7ff98ae 1208 const struct ib_cm_event *ib_event,
0c505f70
HE		 1209 __be64 service_id)
1210{
1211 struct cma_hdr *hdr;
1212 __be16 port;
fbaa1a6d
SH		 1213
1214 hdr = ib_event->private_data;
1215 if (hdr->cma_version != CMA_VERSION)
1216 return -EINVAL;
1217
0c505f70
HE		 1218 port = htons(cma_port_from_service_id(service_id));
1219
fbaa1a6d 1220 switch (cma_get_ip_ver(hdr)) {
e51060f0 1221 case 4:
c50e90d0
AB		 1222 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1223 (struct sockaddr_in *)dst_addr, hdr, port);
e51060f0
SH		 1224 break;
1225 case 6:
c50e90d0
AB		 1226 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1227 (struct sockaddr_in6 *)dst_addr, hdr, port);
e51060f0
SH		 1228 break;
1229 default:
4c21b5bc 1230 return -EAFNOSUPPORT;
e51060f0 1231 }
0c505f70 1232
fbaa1a6d 1233 return 0;
e51060f0
SH		 1234}
1235
0c505f70
HE		 1236static int cma_save_net_info(struct sockaddr *src_addr,
1237 struct sockaddr *dst_addr,
e7ff98ae
PP		 1238 const struct rdma_cm_id *listen_id,
1239 const struct ib_cm_event *ib_event,
0c505f70
HE		 1240 sa_family_t sa_family, __be64 service_id)
1241{
1242 if (sa_family == AF_IB) {
1243 if (ib_event->event == IB_CM_REQ_RECEIVED)
1244 cma_save_ib_info(src_addr, dst_addr, listen_id,
1245 ib_event->param.req_rcvd.primary_path);
1246 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1247 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1248 return 0;
1249 }
1250
1251 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1252}
1253
4c21b5bc
HE		 1254static int cma_save_req_info(const struct ib_cm_event *ib_event,
1255 struct cma_req_info *req)
1256{
1257 const struct ib_cm_req_event_param *req_param =
1258 &ib_event->param.req_rcvd;
1259 const struct ib_cm_sidr_req_event_param *sidr_param =
1260 &ib_event->param.sidr_req_rcvd;
1261
1262 switch (ib_event->event) {
1263 case IB_CM_REQ_RECEIVED:
1264 req->device = req_param->listen_id->device;
1265 req->port = req_param->port;
1266 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1267 sizeof(req->local_gid));
1268 req->has_gid = true;
d3957b86 1269 req->service_id = req_param->primary_path->service_id;
ab3964ad 1270 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
84424a7f
HE		 1271 if (req->pkey != req_param->bth_pkey)
1272 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1273 "RDMA CMA: in the future this may cause the request to be dropped\n",
1274 req_param->bth_pkey, req->pkey);
4c21b5bc
HE		 1275 break;
1276 case IB_CM_SIDR_REQ_RECEIVED:
1277 req->device = sidr_param->listen_id->device;
1278 req->port = sidr_param->port;
1279 req->has_gid = false;
1280 req->service_id = sidr_param->service_id;
ab3964ad 1281 req->pkey = sidr_param->pkey;
84424a7f
HE		 1282 if (req->pkey != sidr_param->bth_pkey)
1283 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1284 "RDMA CMA: in the future this may cause the request to be dropped\n",
1285 sidr_param->bth_pkey, req->pkey);
4c21b5bc
HE		 1286 break;
1287 default:
1288 return -EINVAL;
1289 }
1290
1291 return 0;
1292}
1293
f887f2ac
HE		 1294static bool validate_ipv4_net_dev(struct net_device *net_dev,
1295 const struct sockaddr_in *dst_addr,
1296 const struct sockaddr_in *src_addr)
1297{
1298 __be32 daddr = dst_addr->sin_addr.s_addr,
1299 saddr = src_addr->sin_addr.s_addr;
1300 struct fib_result res;
1301 struct flowi4 fl4;
1302 int err;
1303 bool ret;
1304
1305 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1306 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1307 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1308 ipv4_is_loopback(saddr))
1309 return false;
1310
1311 memset(&fl4, 0, sizeof(fl4));
1312 fl4.flowi4_iif = net_dev->ifindex;
1313 fl4.daddr = daddr;
1314 fl4.saddr = saddr;
1315
1316 rcu_read_lock();
1317 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
d3632493 1318 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
f887f2ac
HE		 1319 rcu_read_unlock();
1320
1321 return ret;
1322}
1323
1324static bool validate_ipv6_net_dev(struct net_device *net_dev,
1325 const struct sockaddr_in6 *dst_addr,
1326 const struct sockaddr_in6 *src_addr)
1327{
1328#if IS_ENABLED(CONFIG_IPV6)
1329 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1330 IPV6_ADDR_LINKLOCAL;
1331 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1332 &src_addr->sin6_addr, net_dev->ifindex,
b75cc8f9 1333 NULL, strict);
f887f2ac
HE		 1334 bool ret;
1335
1336 if (!rt)
1337 return false;
1338
1339 ret = rt->rt6i_idev->dev == net_dev;
1340 ip6_rt_put(rt);
1341
1342 return ret;
1343#else
1344 return false;
1345#endif
1346}
1347
1348static bool validate_net_dev(struct net_device *net_dev,
1349 const struct sockaddr *daddr,
1350 const struct sockaddr *saddr)
1351{
1352 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1353 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1354 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1355 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1356
1357 switch (daddr->sa_family) {
1358 case AF_INET:
1359 return saddr->sa_family == AF_INET &&
1360 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1361
1362 case AF_INET6:
1363 return saddr->sa_family == AF_INET6 &&
1364 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1365
1366 default:
1367 return false;
1368 }
1369}
1370
cee10433
PP		 1371static struct net_device *
1372roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
1373{
1374 const struct ib_gid_attr *sgid_attr = NULL;
1375
1376 if (ib_event->event == IB_CM_REQ_RECEIVED)
1377 sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
1378 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1379 sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
1380
1381 if (!sgid_attr)
1382 return NULL;
1383 dev_hold(sgid_attr->ndev);
1384 return sgid_attr->ndev;
1385}
1386
e7ff98ae 1387static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
2918c1a9 1388 struct cma_req_info *req)
4c21b5bc 1389{
2918c1a9
PP		 1390 struct sockaddr *listen_addr =
1391 (struct sockaddr *)&req->listen_addr_storage;
1392 struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
4c21b5bc
HE		 1393 struct net_device *net_dev;
1394 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1395 int err;
1396
f887f2ac
HE		 1397 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1398 req->service_id);
4c21b5bc
HE		 1399 if (err)
1400 return ERR_PTR(err);
1401
cee10433
PP		 1402 if (rdma_protocol_roce(req->device, req->port))
1403 net_dev = roce_get_net_dev_by_cm_event(ib_event);
1404 else
1405 net_dev = ib_get_net_dev_by_params(req->device, req->port,
1406 req->pkey,
1407 gid, listen_addr);
4c21b5bc
HE		 1408 if (!net_dev)
1409 return ERR_PTR(-ENODEV);
1410
1411 return net_dev;
1412}
1413
2253fc0c 1414static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
4c21b5bc
HE		 1415{
1416 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1417}
1418
1419static bool cma_match_private_data(struct rdma_id_private *id_priv,
1420 const struct cma_hdr *hdr)
1421{
1422 struct sockaddr *addr = cma_src_addr(id_priv);
1423 __be32 ip4_addr;
1424 struct in6_addr ip6_addr;
1425
1426 if (cma_any_addr(addr) && !id_priv->afonly)
1427 return true;
1428
1429 switch (addr->sa_family) {
1430 case AF_INET:
1431 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1432 if (cma_get_ip_ver(hdr) != 4)
1433 return false;
1434 if (!cma_any_addr(addr) &&
1435 hdr->dst_addr.ip4.addr != ip4_addr)
1436 return false;
1437 break;
1438 case AF_INET6:
1439 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1440 if (cma_get_ip_ver(hdr) != 6)
1441 return false;
1442 if (!cma_any_addr(addr) &&
1443 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1444 return false;
1445 break;
1446 case AF_IB:
1447 return true;
1448 default:
1449 return false;
1450 }
1451
1452 return true;
1453}
1454
b8cab5da
HE		 1455static bool cma_protocol_roce(const struct rdma_cm_id *id)
1456{
1457 struct ib_device *device = id->device;
1458 const int port_num = id->port_num ?: rdma_start_port(device);
1459
5ac08a34 1460 return rdma_protocol_roce(device, port_num);
b8cab5da
HE		 1461}
1462
fac51590
MB		 1463static bool cma_match_net_dev(const struct rdma_cm_id *id,
1464 const struct net_device *net_dev,
1465 u8 port_num)
4c21b5bc 1466{
fac51590 1467 const struct rdma_addr *addr = &id->route.addr;
4c21b5bc
HE		 1468
1469 if (!net_dev)
d274e45c 1470 /* This request is an AF_IB request */
fac51590 1471 return (!id->port_num || id->port_num == port_num) &&
d274e45c 1472 (addr->src_addr.ss_family == AF_IB);
4c21b5bc 1473
643d213a
PP		 1474 /*
1475 * Net namespaces must match, and if the listner is listening
1476 * on a specific netdevice than netdevice must match as well.
1477 */
1478 if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1479 (!!addr->dev_addr.bound_dev_if ==
1480 (addr->dev_addr.bound_dev_if == net_dev->ifindex)))
1481 return true;
1482 else
1483 return false;
4c21b5bc
HE		 1484}
1485
1486static struct rdma_id_private *cma_find_listener(
1487 const struct rdma_bind_list *bind_list,
1488 const struct ib_cm_id *cm_id,
1489 const struct ib_cm_event *ib_event,
1490 const struct cma_req_info *req,
1491 const struct net_device *net_dev)
1492{
1493 struct rdma_id_private *id_priv, *id_priv_dev;
1494
1495 if (!bind_list)
1496 return ERR_PTR(-EINVAL);
1497
1498 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1499 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1500 if (id_priv->id.device == cm_id->device &&
fac51590 1501 cma_match_net_dev(&id_priv->id, net_dev, req->port))
4c21b5bc
HE		 1502 return id_priv;
1503 list_for_each_entry(id_priv_dev,
1504 &id_priv->listen_list,
1505 listen_list) {
1506 if (id_priv_dev->id.device == cm_id->device &&
fac51590 1507 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
4c21b5bc
HE		 1508 return id_priv_dev;
1509 }
1510 }
1511 }
1512
1513 return ERR_PTR(-EINVAL);
1514}
1515
e7ff98ae 1516static struct rdma_id_private *
85463316
PP		 1517cma_ib_id_from_event(struct ib_cm_id *cm_id,
1518 const struct ib_cm_event *ib_event,
1519 struct net_device **net_dev)
4c21b5bc
HE		 1520{
1521 struct cma_req_info req;
1522 struct rdma_bind_list *bind_list;
1523 struct rdma_id_private *id_priv;
4c21b5bc
HE		 1524 int err;
1525
1526 err = cma_save_req_info(ib_event, &req);
1527 if (err)
1528 return ERR_PTR(err);
1529
0b3ca768
HE		 1530 *net_dev = cma_get_net_dev(ib_event, &req);
1531 if (IS_ERR(*net_dev)) {
1532 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
4c21b5bc 1533 /* Assuming the protocol is AF_IB */
0b3ca768 1534 *net_dev = NULL;
4c21b5bc 1535 } else {
0b3ca768 1536 return ERR_CAST(*net_dev);
4c21b5bc
HE		 1537 }
1538 }
1539
2918c1a9
PP		 1540 /*
1541 * Net namespace might be getting deleted while route lookup,
1542 * cm_id lookup is in progress. Therefore, perform netdevice
1543 * validation, cm_id lookup under rcu lock.
1544 * RCU lock along with netdevice state check, synchronizes with
1545 * netdevice migrating to different net namespace and also avoids
1546 * case where net namespace doesn't get deleted while lookup is in
1547 * progress.
1548 * If the device state is not IFF_UP, its properties such as ifindex
1549 * and nd_net cannot be trusted to remain valid without rcu lock.
1550 * net/core/dev.c change_net_namespace() ensures to synchronize with
1551 * ongoing operations on net device after device is closed using
1552 * synchronize_net().
1553 */
1554 rcu_read_lock();
1555 if (*net_dev) {
1556 /*
1557 * If netdevice is down, it is likely that it is administratively
1558 * down or it might be migrating to different namespace.
1559 * In that case avoid further processing, as the net namespace
1560 * or ifindex may change.
1561 */
1562 if (((*net_dev)->flags & IFF_UP) == 0) {
1563 id_priv = ERR_PTR(-EHOSTUNREACH);
1564 goto err;
1565 }
1566
1567 if (!validate_net_dev(*net_dev,
1568 (struct sockaddr *)&req.listen_addr_storage,
1569 (struct sockaddr *)&req.src_addr_storage)) {
1570 id_priv = ERR_PTR(-EHOSTUNREACH);
1571 goto err;
1572 }
1573 }
1574
fa20105e 1575 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
4be74b42 1576 rdma_ps_from_service_id(req.service_id),
4c21b5bc 1577 cma_port_from_service_id(req.service_id));
0b3ca768 1578 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
2918c1a9
PP		 1579err:
1580 rcu_read_unlock();
b3b51f9f 1581 if (IS_ERR(id_priv) && *net_dev) {
be688195
HE		 1582 dev_put(*net_dev);
1583 *net_dev = NULL;
1584 }
4c21b5bc
HE		 1585 return id_priv;
1586}
1587
c0b64f58 1588static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
e51060f0 1589{
e8160e15 1590 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
e51060f0
SH		 1591}
1592
e51060f0
SH		 1593static void cma_cancel_route(struct rdma_id_private *id_priv)
1594{
fe53ba2f 1595 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
e51060f0
SH		 1596 if (id_priv->query)
1597 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
e51060f0
SH		 1598 }
1599}
1600
e51060f0
SH		 1601static void cma_cancel_listens(struct rdma_id_private *id_priv)
1602{
1603 struct rdma_id_private *dev_id_priv;
1604
d02d1f53
SH		 1605 /*
1606 * Remove from listen_any_list to prevent added devices from spawning
1607 * additional listen requests.
1608 */
e51060f0
SH		 1609 mutex_lock(&lock);
1610 list_del(&id_priv->list);
1611
1612 while (!list_empty(&id_priv->listen_list)) {
1613 dev_id_priv = list_entry(id_priv->listen_list.next,
1614 struct rdma_id_private, listen_list);
d02d1f53
SH		 1615 /* sync with device removal to avoid duplicate destruction */
1616 list_del_init(&dev_id_priv->list);
1617 list_del(&dev_id_priv->listen_list);
1618 mutex_unlock(&lock);
1619
1620 rdma_destroy_id(&dev_id_priv->id);
1621 mutex_lock(&lock);
e51060f0
SH		 1622 }
1623 mutex_unlock(&lock);
1624}
1625
1626static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 1627 enum rdma_cm_state state)
e51060f0
SH		 1628{
1629 switch (state) {
550e5ca7 1630 case RDMA_CM_ADDR_QUERY:
e51060f0
SH		 1631 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1632 break;
550e5ca7 1633 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 1634 cma_cancel_route(id_priv);
1635 break;
550e5ca7 1636 case RDMA_CM_LISTEN:
f4753834 1637 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
e51060f0
SH		 1638 cma_cancel_listens(id_priv);
1639 break;
1640 default:
1641 break;
1642 }
1643}
1644
1645static void cma_release_port(struct rdma_id_private *id_priv)
1646{
1647 struct rdma_bind_list *bind_list = id_priv->bind_list;
fa20105e 1648 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0
SH		 1649
1650 if (!bind_list)
1651 return;
1652
1653 mutex_lock(&lock);
1654 hlist_del(&id_priv->node);
1655 if (hlist_empty(&bind_list->owners)) {
fa20105e 1656 cma_ps_remove(net, bind_list->ps, bind_list->port);
e51060f0
SH		 1657 kfree(bind_list);
1658 }
1659 mutex_unlock(&lock);
1660}
1661
88145678
PP		 1662static void cma_leave_roce_mc_group(struct rdma_id_private *id_priv,
1663 struct cma_multicast *mc)
1664{
c0126915
JG		 1665 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1666 struct net_device *ndev = NULL;
1667
1668 if (dev_addr->bound_dev_if)
1669 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
1670 if (ndev) {
1671 cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, false);
1672 dev_put(ndev);
88145678
PP		 1673 }
1674 kref_put(&mc->mcref, release_mc);
1675}
1676
c8f6a362
SH		 1677static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1678{
1679 struct cma_multicast *mc;
1680
1681 while (!list_empty(&id_priv->mc_list)) {
1682 mc = container_of(id_priv->mc_list.next,
1683 struct cma_multicast, list);
1684 list_del(&mc->list);
a31ad3b0 1685 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
5c9a5282 1686 id_priv->id.port_num)) {
3c86aa70
EC		 1687 ib_sa_free_multicast(mc->multicast.ib);
1688 kfree(mc);
bee3c3c9 1689 } else {
88145678 1690 cma_leave_roce_mc_group(id_priv, mc);
bee3c3c9 1691 }
c8f6a362
SH		 1692 }
1693}
1694
e51060f0
SH		 1695void rdma_destroy_id(struct rdma_cm_id *id)
1696{
1697 struct rdma_id_private *id_priv;
550e5ca7 1698 enum rdma_cm_state state;
e51060f0
SH		 1699
1700 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1701 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1702 cma_cancel_operation(id_priv, state);
1703
a396d43a
SH		 1704 /*
1705 * Wait for any active callback to finish. New callbacks will find
1706 * the id_priv state set to destroying and abort.
1707 */
1708 mutex_lock(&id_priv->handler_mutex);
1709 mutex_unlock(&id_priv->handler_mutex);
1710
e51060f0 1711 if (id_priv->cma_dev) {
00313983 1712 rdma_restrack_del(&id_priv->res);
72219cea 1713 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
0c9361fc 1714 if (id_priv->cm_id.ib)
e51060f0 1715 ib_destroy_cm_id(id_priv->cm_id.ib);
04215330 1716 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
0c9361fc 1717 if (id_priv->cm_id.iw)
07ebafba 1718 iw_destroy_cm_id(id_priv->cm_id.iw);
e51060f0 1719 }
c8f6a362 1720 cma_leave_mc_groups(id_priv);
a396d43a 1721 cma_release_dev(id_priv);
e51060f0
SH		 1722 }
1723
1724 cma_release_port(id_priv);
1725 cma_deref_id(id_priv);
1726 wait_for_completion(&id_priv->comp);
1727
d02d1f53
SH		 1728 if (id_priv->internal_id)
1729 cma_deref_id(id_priv->id.context);
1730
e51060f0 1731 kfree(id_priv->id.route.path_rec);
4ed13a5f
PP		 1732
1733 if (id_priv->id.route.addr.dev_addr.sgid_attr)
1734 rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
1735
fa20105e 1736 put_net(id_priv->id.route.addr.dev_addr.net);
e51060f0
SH		 1737 kfree(id_priv);
1738}
1739EXPORT_SYMBOL(rdma_destroy_id);
1740
1741static int cma_rep_recv(struct rdma_id_private *id_priv)
1742{
1743 int ret;
1744
5851bb89 1745 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 1746 if (ret)
1747 goto reject;
1748
5851bb89 1749 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 1750 if (ret)
1751 goto reject;
1752
1753 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1754 if (ret)
1755 goto reject;
1756
1757 return 0;
1758reject:
498683c6 1759 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
c5483388 1760 cma_modify_qp_err(id_priv);
e51060f0
SH		 1761 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1762 NULL, 0, NULL, 0);
1763 return ret;
1764}
1765
a1b1b61f 1766static void cma_set_rep_event_data(struct rdma_cm_event *event,
e7ff98ae 1767 const struct ib_cm_rep_event_param *rep_data,
a1b1b61f
SH		 1768 void *private_data)
1769{
1770 event->param.conn.private_data = private_data;
1771 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1772 event->param.conn.responder_resources = rep_data->responder_resources;
1773 event->param.conn.initiator_depth = rep_data->initiator_depth;
1774 event->param.conn.flow_control = rep_data->flow_control;
1775 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1776 event->param.conn.srq = rep_data->srq;
1777 event->param.conn.qp_num = rep_data->remote_qpn;
1778}
1779
e7ff98ae
PP		 1780static int cma_ib_handler(struct ib_cm_id *cm_id,
1781 const struct ib_cm_event *ib_event)
e51060f0
SH		 1782{
1783 struct rdma_id_private *id_priv = cm_id->context;
7582df82 1784 struct rdma_cm_event event = {};
a1b1b61f 1785 int ret = 0;
e51060f0 1786
37e07cda 1787 mutex_lock(&id_priv->handler_mutex);
38ca83a5 1788 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
37e07cda 1789 id_priv->state != RDMA_CM_CONNECT) ||
38ca83a5 1790 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
37e07cda
BVA		 1791 id_priv->state != RDMA_CM_DISCONNECT))
1792 goto out;
e51060f0
SH		 1793
1794 switch (ib_event->event) {
1795 case IB_CM_REQ_ERROR:
1796 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1797 event.event = RDMA_CM_EVENT_UNREACHABLE;
1798 event.status = -ETIMEDOUT;
e51060f0
SH		 1799 break;
1800 case IB_CM_REP_RECEIVED:
61c0ddbe
MS		 1801 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1802 (id_priv->id.qp_type != IB_QPT_UD))
1803 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
01602f11 1804 if (id_priv->id.qp) {
a1b1b61f
SH		 1805 event.status = cma_rep_recv(id_priv);
1806 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1807 RDMA_CM_EVENT_ESTABLISHED;
01602f11 1808 } else {
a1b1b61f 1809 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
01602f11 1810 }
a1b1b61f
SH		 1811 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1812 ib_event->private_data);
e51060f0
SH		 1813 break;
1814 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1815 case IB_CM_USER_ESTABLISHED:
1816 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1817 break;
1818 case IB_CM_DREQ_ERROR:
a1b1b61f 1819 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1820 case IB_CM_DREQ_RECEIVED:
1821 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 1822 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1823 RDMA_CM_DISCONNECT))
e51060f0 1824 goto out;
a1b1b61f 1825 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1826 break;
1827 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1828 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1829 break;
e51060f0
SH		 1830 case IB_CM_MRA_RECEIVED:
1831 /* ignore event */
1832 goto out;
1833 case IB_CM_REJ_RECEIVED:
498683c6
MS		 1834 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1835 ib_event->param.rej_rcvd.reason));
c5483388 1836 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1837 event.status = ib_event->param.rej_rcvd.reason;
1838 event.event = RDMA_CM_EVENT_REJECTED;
1839 event.param.conn.private_data = ib_event->private_data;
1840 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1841 break;
1842 default:
aba25a3e 1843 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1844 ib_event->event);
1845 goto out;
1846 }
1847
a1b1b61f 1848 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1849 if (ret) {
1850 /* Destroy the CM ID by returning a non-zero value. */
1851 id_priv->cm_id.ib = NULL;
550e5ca7 1852 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1853 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1854 rdma_destroy_id(&id_priv->id);
1855 return ret;
1856 }
1857out:
de910bd9 1858 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1859 return ret;
1860}
1861
e7ff98ae 1862static struct rdma_id_private *
85463316
PP		 1863cma_ib_new_conn_id(const struct rdma_cm_id *listen_id,
1864 const struct ib_cm_event *ib_event,
1865 struct net_device *net_dev)
e51060f0 1866{
00313983 1867 struct rdma_id_private *listen_id_priv;
e51060f0
SH		 1868 struct rdma_id_private *id_priv;
1869 struct rdma_cm_id *id;
1870 struct rdma_route *rt;
0c505f70 1871 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
9fdca4da 1872 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
d3957b86
MD		 1873 const __be64 service_id =
1874 ib_event->param.req_rcvd.primary_path->service_id;
64c5e613 1875 int ret;
e51060f0 1876
00313983
SW		 1877 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
1878 id = __rdma_create_id(listen_id->route.addr.dev_addr.net,
fa20105e 1879 listen_id->event_handler, listen_id->context,
00313983
SW		 1880 listen_id->ps, ib_event->param.req_rcvd.qp_type,
1881 listen_id_priv->res.kern_name);
e51060f0 1882 if (IS_ERR(id))
0c9361fc 1883 return NULL;
3f168d2b 1884
f4753834 1885 id_priv = container_of(id, struct rdma_id_private, id);
0c505f70
HE		 1886 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1887 (struct sockaddr *)&id->route.addr.dst_addr,
1888 listen_id, ib_event, ss_family, service_id))
fbaa1a6d 1889 goto err;
e51060f0
SH		 1890
1891 rt = &id->route;
1892 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
6da2ec56
KC		 1893 rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
1894 GFP_KERNEL);
e51060f0 1895 if (!rt->path_rec)
0c9361fc 1896 goto err;
e51060f0 1897
9fdca4da 1898 rt->path_rec[0] = *path;
e51060f0
SH		 1899 if (rt->num_paths == 2)
1900 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1901
0b3ca768 1902 if (net_dev) {
e08ce2e8 1903 rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
0b3ca768 1904 } else {
b8cab5da
HE		 1905 if (!cma_protocol_roce(listen_id) &&
1906 cma_any_addr(cma_src_addr(id_priv))) {
1907 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1908 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1909 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1910 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1911 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1912 if (ret)
1913 goto err;
1914 }
6f8372b6
SH		 1915 }
1916 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0 1917
550e5ca7 1918 id_priv->state = RDMA_CM_CONNECT;
e51060f0 1919 return id_priv;
3f168d2b 1920
3f168d2b 1921err:
0c9361fc 1922 rdma_destroy_id(id);
e51060f0
SH		 1923 return NULL;
1924}
1925
e7ff98ae 1926static struct rdma_id_private *
85463316
PP		 1927cma_ib_new_udp_id(const struct rdma_cm_id *listen_id,
1928 const struct ib_cm_event *ib_event,
1929 struct net_device *net_dev)
628e5f6d 1930{
e7ff98ae 1931 const struct rdma_id_private *listen_id_priv;
628e5f6d
SH		 1932 struct rdma_id_private *id_priv;
1933 struct rdma_cm_id *id;
0c505f70 1934 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
fa20105e 1935 struct net *net = listen_id->route.addr.dev_addr.net;
628e5f6d
SH		 1936 int ret;
1937
00313983
SW		 1938 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
1939 id = __rdma_create_id(net, listen_id->event_handler, listen_id->context,
1940 listen_id->ps, IB_QPT_UD,
1941 listen_id_priv->res.kern_name);
628e5f6d
SH		 1942 if (IS_ERR(id))
1943 return NULL;
1944
f4753834 1945 id_priv = container_of(id, struct rdma_id_private, id);
0c505f70
HE		 1946 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1947 (struct sockaddr *)&id->route.addr.dst_addr,
1948 listen_id, ib_event, ss_family,
1949 ib_event->param.sidr_req_rcvd.service_id))
628e5f6d
SH		 1950 goto err;
1951
0b3ca768 1952 if (net_dev) {
e08ce2e8 1953 rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
0b3ca768 1954 } else {
b8cab5da
HE		 1955 if (!cma_any_addr(cma_src_addr(id_priv))) {
1956 ret = cma_translate_addr(cma_src_addr(id_priv),
1957 &id->route.addr.dev_addr);
1958 if (ret)
1959 goto err;
1960 }
6f8372b6 1961 }
628e5f6d 1962
550e5ca7 1963 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 1964 return id_priv;
1965err:
1966 rdma_destroy_id(id);
1967 return NULL;
1968}
1969
a1b1b61f 1970static void cma_set_req_event_data(struct rdma_cm_event *event,
e7ff98ae 1971 const struct ib_cm_req_event_param *req_data,
a1b1b61f
SH		 1972 void *private_data, int offset)
1973{
1974 event->param.conn.private_data = private_data + offset;
1975 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1976 event->param.conn.responder_resources = req_data->responder_resources;
1977 event->param.conn.initiator_depth = req_data->initiator_depth;
1978 event->param.conn.flow_control = req_data->flow_control;
1979 event->param.conn.retry_count = req_data->retry_count;
1980 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1981 event->param.conn.srq = req_data->srq;
1982 event->param.conn.qp_num = req_data->remote_qpn;
1983}
1984
85463316
PP		 1985static int cma_ib_check_req_qp_type(const struct rdma_cm_id *id,
1986 const struct ib_cm_event *ib_event)
9595480c 1987{
4dd81e89 1988 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 1989 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1990 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1991 (id->qp_type == IB_QPT_UD)) ||
1992 (!id->qp_type));
1993}
1994
85463316
PP		 1995static int cma_ib_req_handler(struct ib_cm_id *cm_id,
1996 const struct ib_cm_event *ib_event)
e51060f0 1997{
37e07cda 1998 struct rdma_id_private *listen_id, *conn_id = NULL;
7582df82 1999 struct rdma_cm_event event = {};
0b3ca768 2000 struct net_device *net_dev;
c0b64f58
BVA		 2001 u8 offset;
2002 int ret;
e51060f0 2003
85463316 2004 listen_id = cma_ib_id_from_event(cm_id, ib_event, &net_dev);
4c21b5bc
HE		 2005 if (IS_ERR(listen_id))
2006 return PTR_ERR(listen_id);
2007
85463316 2008 if (!cma_ib_check_req_qp_type(&listen_id->id, ib_event)) {
0b3ca768
HE		 2009 ret = -EINVAL;
2010 goto net_dev_put;
2011 }
9595480c 2012
37e07cda
BVA		 2013 mutex_lock(&listen_id->handler_mutex);
2014 if (listen_id->state != RDMA_CM_LISTEN) {
0b3ca768 2015 ret = -ECONNABORTED;
37e07cda 2016 goto err1;
0b3ca768 2017 }
e51060f0 2018
e8160e15 2019 offset = cma_user_data_offset(listen_id);
628e5f6d 2020 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 2021 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
85463316 2022 conn_id = cma_ib_new_udp_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 2023 event.param.ud.private_data = ib_event->private_data + offset;
2024 event.param.ud.private_data_len =
2025 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
2026 } else {
85463316 2027 conn_id = cma_ib_new_conn_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 2028 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
2029 ib_event->private_data, offset);
2030 }
e51060f0
SH		 2031 if (!conn_id) {
2032 ret = -ENOMEM;
b6cec8aa 2033 goto err1;
e51060f0
SH		 2034 }
2035
de910bd9 2036 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
be9130cc 2037 ret = cma_acquire_dev(conn_id, listen_id);
a1a733f6 2038 if (ret)
b6cec8aa 2039 goto err2;
e51060f0
SH		 2040
2041 conn_id->cm_id.ib = cm_id;
2042 cm_id->context = conn_id;
2043 cm_id->cm_handler = cma_ib_handler;
2044
25ae21a1
SH		 2045 /*
2046 * Protect against the user destroying conn_id from another thread
2047 * until we're done accessing it.
2048 */
2049 atomic_inc(&conn_id->refcount);
a1b1b61f 2050 ret = conn_id->id.event_handler(&conn_id->id, &event);
b6cec8aa
SH		 2051 if (ret)
2052 goto err3;
b6cec8aa
SH		 2053 /*
2054 * Acquire mutex to prevent user executing rdma_destroy_id()
2055 * while we're accessing the cm_id.
2056 */
2057 mutex_lock(&lock);
dd5f03be
MB		 2058 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2059 (conn_id->id.qp_type != IB_QPT_UD))
b6cec8aa
SH		 2060 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2061 mutex_unlock(&lock);
2062 mutex_unlock(&conn_id->handler_mutex);
2063 mutex_unlock(&listen_id->handler_mutex);
25ae21a1 2064 cma_deref_id(conn_id);
0b3ca768
HE		 2065 if (net_dev)
2066 dev_put(net_dev);
b6cec8aa 2067 return 0;
a1a733f6 2068
b6cec8aa
SH		 2069err3:
2070 cma_deref_id(conn_id);
a1a733f6
KK		 2071 /* Destroy the CM ID by returning a non-zero value. */
2072 conn_id->cm_id.ib = NULL;
b6cec8aa 2073err2:
550e5ca7 2074 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 2075 mutex_unlock(&conn_id->handler_mutex);
b6cec8aa 2076err1:
de910bd9 2077 mutex_unlock(&listen_id->handler_mutex);
b6cec8aa
SH		 2078 if (conn_id)
2079 rdma_destroy_id(&conn_id->id);
0b3ca768
HE		 2080
2081net_dev_put:
2082 if (net_dev)
2083 dev_put(net_dev);
2084
e51060f0
SH		 2085 return ret;
2086}
2087
cf53936f 2088__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
e51060f0 2089{
496ce3ce
SH		 2090 if (addr->sa_family == AF_IB)
2091 return ((struct sockaddr_ib *) addr)->sib_sid;
2092
cf53936f 2093 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0 2094}
cf53936f 2095EXPORT_SYMBOL(rdma_get_service_id);
e51060f0 2096
411460ac
PP		 2097void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
2098 union ib_gid *dgid)
2099{
2100 struct rdma_addr *addr = &cm_id->route.addr;
2101
2102 if (!cm_id->device) {
2103 if (sgid)
2104 memset(sgid, 0, sizeof(*sgid));
2105 if (dgid)
2106 memset(dgid, 0, sizeof(*dgid));
2107 return;
2108 }
2109
2110 if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
2111 if (sgid)
2112 rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
2113 if (dgid)
2114 rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
2115 } else {
2116 if (sgid)
2117 rdma_addr_get_sgid(&addr->dev_addr, sgid);
2118 if (dgid)
2119 rdma_addr_get_dgid(&addr->dev_addr, dgid);
2120 }
2121}
2122EXPORT_SYMBOL(rdma_read_gids);
2123
07ebafba
TT		 2124static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2125{
2126 struct rdma_id_private *id_priv = iw_id->context;
7582df82 2127 struct rdma_cm_event event = {};
07ebafba 2128 int ret = 0;
24d44a39
SW		 2129 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2130 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba 2131
37e07cda
BVA		 2132 mutex_lock(&id_priv->handler_mutex);
2133 if (id_priv->state != RDMA_CM_CONNECT)
2134 goto out;
07ebafba
TT		 2135
2136 switch (iw_event->event) {
2137 case IW_CM_EVENT_CLOSE:
a1b1b61f 2138 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 2139 break;
2140 case IW_CM_EVENT_CONNECT_REPLY:
24d44a39
SW		 2141 memcpy(cma_src_addr(id_priv), laddr,
2142 rdma_addr_size(laddr));
2143 memcpy(cma_dst_addr(id_priv), raddr,
2144 rdma_addr_size(raddr));
881a045f
SW		 2145 switch (iw_event->status) {
2146 case 0:
a1b1b61f 2147 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 2148 event.param.conn.initiator_depth = iw_event->ird;
2149 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 2150 break;
2151 case -ECONNRESET:
2152 case -ECONNREFUSED:
2153 event.event = RDMA_CM_EVENT_REJECTED;
2154 break;
2155 case -ETIMEDOUT:
2156 event.event = RDMA_CM_EVENT_UNREACHABLE;
2157 break;
2158 default:
2159 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2160 break;
2161 }
07ebafba
TT		 2162 break;
2163 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 2164 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 2165 event.param.conn.initiator_depth = iw_event->ird;
2166 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 2167 break;
2168 default:
671a6cc2 2169 goto out;
07ebafba
TT		 2170 }
2171
a1b1b61f
SH		 2172 event.status = iw_event->status;
2173 event.param.conn.private_data = iw_event->private_data;
2174 event.param.conn.private_data_len = iw_event->private_data_len;
2175 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 2176 if (ret) {
2177 /* Destroy the CM ID by returning a non-zero value. */
2178 id_priv->cm_id.iw = NULL;
550e5ca7 2179 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2180 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 2181 rdma_destroy_id(&id_priv->id);
2182 return ret;
2183 }
2184
37e07cda 2185out:
de910bd9 2186 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 2187 return ret;
2188}
2189
2190static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2191 struct iw_cm_event *iw_event)
2192{
2193 struct rdma_cm_id *new_cm_id;
2194 struct rdma_id_private *listen_id, *conn_id;
7582df82 2195 struct rdma_cm_event event = {};
37e07cda 2196 int ret = -ECONNABORTED;
24d44a39
SW		 2197 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2198 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba 2199
7582df82
PP		 2200 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2201 event.param.conn.private_data = iw_event->private_data;
2202 event.param.conn.private_data_len = iw_event->private_data_len;
2203 event.param.conn.initiator_depth = iw_event->ird;
2204 event.param.conn.responder_resources = iw_event->ord;
2205
07ebafba 2206 listen_id = cm_id->context;
37e07cda
BVA		 2207
2208 mutex_lock(&listen_id->handler_mutex);
2209 if (listen_id->state != RDMA_CM_LISTEN)
2210 goto out;
07ebafba
TT		 2211
2212 /* Create a new RDMA id for the new IW CM ID */
00313983
SW		 2213 new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2214 listen_id->id.event_handler,
2215 listen_id->id.context,
2216 RDMA_PS_TCP, IB_QPT_RC,
2217 listen_id->res.kern_name);
10f32065 2218 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 2219 ret = -ENOMEM;
2220 goto out;
2221 }
2222 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 2223 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 2224 conn_id->state = RDMA_CM_CONNECT;
07ebafba 2225
575c7e58 2226 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
07ebafba 2227 if (ret) {
de910bd9 2228 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 2229 rdma_destroy_id(new_cm_id);
2230 goto out;
2231 }
2232
be9130cc 2233 ret = cma_acquire_dev(conn_id, listen_id);
07ebafba 2234 if (ret) {
de910bd9 2235 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 2236 rdma_destroy_id(new_cm_id);
2237 goto out;
2238 }
2239
2240 conn_id->cm_id.iw = cm_id;
2241 cm_id->context = conn_id;
2242 cm_id->cm_handler = cma_iw_handler;
2243
24d44a39
SW		 2244 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2245 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
07ebafba 2246
25ae21a1
SH		 2247 /*
2248 * Protect against the user destroying conn_id from another thread
2249 * until we're done accessing it.
2250 */
2251 atomic_inc(&conn_id->refcount);
a1b1b61f 2252 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 2253 if (ret) {
2254 /* User wants to destroy the CM ID */
2255 conn_id->cm_id.iw = NULL;
550e5ca7 2256 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 2257 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 2258 cma_deref_id(conn_id);
07ebafba 2259 rdma_destroy_id(&conn_id->id);
de910bd9 2260 goto out;
07ebafba
TT		 2261 }
2262
de910bd9 2263 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 2264 cma_deref_id(conn_id);
de910bd9 2265
07ebafba 2266out:
de910bd9 2267 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 2268 return ret;
2269}
2270
e51060f0
SH		 2271static int cma_ib_listen(struct rdma_id_private *id_priv)
2272{
e51060f0 2273 struct sockaddr *addr;
0c9361fc 2274 struct ib_cm_id *id;
e51060f0 2275 __be64 svc_id;
e51060f0 2276
51efe394
HE		 2277 addr = cma_src_addr(id_priv);
2278 svc_id = rdma_get_service_id(&id_priv->id, addr);
85463316
PP		 2279 id = ib_cm_insert_listen(id_priv->id.device,
2280 cma_ib_req_handler, svc_id);
0c9361fc
JM		 2281 if (IS_ERR(id))
2282 return PTR_ERR(id);
0c9361fc 2283 id_priv->cm_id.ib = id;
e51060f0 2284
51efe394 2285 return 0;
e51060f0
SH		 2286}
2287
07ebafba
TT		 2288static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2289{
2290 int ret;
0c9361fc
JM		 2291 struct iw_cm_id *id;
2292
2293 id = iw_create_cm_id(id_priv->id.device,
2294 iw_conn_req_handler,
2295 id_priv);
2296 if (IS_ERR(id))
2297 return PTR_ERR(id);
07ebafba 2298
68cdba06 2299 id->tos = id_priv->tos;
0c9361fc 2300 id_priv->cm_id.iw = id;
07ebafba 2301
24d44a39
SW		 2302 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2303 rdma_addr_size(cma_src_addr(id_priv)));
07ebafba
TT		 2304
2305 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2306
2307 if (ret) {
2308 iw_destroy_cm_id(id_priv->cm_id.iw);
2309 id_priv->cm_id.iw = NULL;
2310 }
2311
2312 return ret;
2313}
2314
e51060f0
SH		 2315static int cma_listen_handler(struct rdma_cm_id *id,
2316 struct rdma_cm_event *event)
2317{
2318 struct rdma_id_private *id_priv = id->context;
2319
2320 id->context = id_priv->id.context;
2321 id->event_handler = id_priv->id.event_handler;
2322 return id_priv->id.event_handler(id, event);
2323}
2324
2325static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2326 struct cma_device *cma_dev)
2327{
2328 struct rdma_id_private *dev_id_priv;
2329 struct rdma_cm_id *id;
fa20105e 2330 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0
SH		 2331 int ret;
2332
72219cea 2333 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
94d0c939
SH		 2334 return;
2335
00313983
SW		 2336 id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2337 id_priv->id.qp_type, id_priv->res.kern_name);
e51060f0
SH		 2338 if (IS_ERR(id))
2339 return;
2340
2341 dev_id_priv = container_of(id, struct rdma_id_private, id);
2342
550e5ca7 2343 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
f4753834
SH		 2344 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2345 rdma_addr_size(cma_src_addr(id_priv)));
e51060f0 2346
045959db 2347 _cma_attach_to_dev(dev_id_priv, cma_dev);
e51060f0 2348 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 2349 atomic_inc(&id_priv->refcount);
2350 dev_id_priv->internal_id = 1;
5b0ec991 2351 dev_id_priv->afonly = id_priv->afonly;
e51060f0
SH		 2352
2353 ret = rdma_listen(id, id_priv->backlog);
2354 if (ret)
aba25a3e
PP		 2355 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2356 ret, cma_dev->device->name);
e51060f0
SH		 2357}
2358
2359static void cma_listen_on_all(struct rdma_id_private *id_priv)
2360{
2361 struct cma_device *cma_dev;
2362
2363 mutex_lock(&lock);
2364 list_add_tail(&id_priv->list, &listen_any_list);
2365 list_for_each_entry(cma_dev, &dev_list, list)
2366 cma_listen_on_dev(id_priv, cma_dev);
2367 mutex_unlock(&lock);
2368}
2369
a81c994d
SH		 2370void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2371{
2372 struct rdma_id_private *id_priv;
2373
2374 id_priv = container_of(id, struct rdma_id_private, id);
2375 id_priv->tos = (u8) tos;
89052d78 2376 id_priv->tos_set = true;
a81c994d
SH		 2377}
2378EXPORT_SYMBOL(rdma_set_service_type);
2379
c2f8fc4e 2380static void cma_query_handler(int status, struct sa_path_rec *path_rec,
e51060f0
SH		 2381 void *context)
2382{
2383 struct cma_work *work = context;
2384 struct rdma_route *route;
2385
2386 route = &work->id->id.route;
2387
2388 if (!status) {
2389 route->num_paths = 1;
2390 *route->path_rec = *path_rec;
2391 } else {
550e5ca7
NM		 2392 work->old_state = RDMA_CM_ROUTE_QUERY;
2393 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0 2394 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 2395 work->event.status = status;
498683c6
MS		 2396 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2397 status);
e51060f0
SH		 2398 }
2399
2400 queue_work(cma_wq, &work->work);
2401}
2402
2403static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2404 struct cma_work *work)
2405{
f4753834 2406 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
c2f8fc4e 2407 struct sa_path_rec path_rec;
a81c994d
SH		 2408 ib_sa_comp_mask comp_mask;
2409 struct sockaddr_in6 *sin6;
f68194ca 2410 struct sockaddr_ib *sib;
e51060f0
SH		 2411
2412 memset(&path_rec, 0, sizeof path_rec);
4c33bd19
DC		 2413
2414 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2415 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2416 else
2417 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
f4753834
SH		 2418 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2419 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2420 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
e51060f0 2421 path_rec.numb_path = 1;
962063e6 2422 path_rec.reversible = 1;
d3957b86
MD		 2423 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2424 cma_dst_addr(id_priv));
a81c994d
SH		 2425
2426 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2427 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2428 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2429
f68194ca
SH		 2430 switch (cma_family(id_priv)) {
2431 case AF_INET:
a81c994d
SH		 2432 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2433 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
f68194ca
SH		 2434 break;
2435 case AF_INET6:
f4753834 2436 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
a81c994d
SH		 2437 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2438 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
f68194ca
SH		 2439 break;
2440 case AF_IB:
2441 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2442 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2443 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2444 break;
a81c994d 2445 }
e51060f0 2446
c1a0b23b 2447 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 2448 id_priv->id.port_num, &path_rec,
2449 comp_mask, timeout_ms,
2450 GFP_KERNEL, cma_query_handler,
2451 work, &id_priv->query);
e51060f0
SH		 2452
2453 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2454}
2455
c4028958 2456static void cma_work_handler(struct work_struct *_work)
e51060f0 2457{
c4028958 2458 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 2459 struct rdma_id_private *id_priv = work->id;
2460 int destroy = 0;
2461
de910bd9 2462 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 2463 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2464 goto out;
2465
2466 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 2467 cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 2468 destroy = 1;
2469 }
2470out:
de910bd9 2471 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2472 cma_deref_id(id_priv);
2473 if (destroy)
2474 rdma_destroy_id(&id_priv->id);
2475 kfree(work);
2476}
2477
dd5bdff8
OG		 2478static void cma_ndev_work_handler(struct work_struct *_work)
2479{
2480 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2481 struct rdma_id_private *id_priv = work->id;
2482 int destroy = 0;
2483
2484 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2485 if (id_priv->state == RDMA_CM_DESTROYING ||
2486 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
dd5bdff8
OG		 2487 goto out;
2488
2489 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 2490 cma_exch(id_priv, RDMA_CM_DESTROYING);
dd5bdff8
OG		 2491 destroy = 1;
2492 }
2493
2494out:
2495 mutex_unlock(&id_priv->handler_mutex);
2496 cma_deref_id(id_priv);
2497 if (destroy)
2498 rdma_destroy_id(&id_priv->id);
2499 kfree(work);
2500}
2501
981b5a23
PP		 2502static void cma_init_resolve_route_work(struct cma_work *work,
2503 struct rdma_id_private *id_priv)
2504{
2505 work->id = id_priv;
2506 INIT_WORK(&work->work, cma_work_handler);
2507 work->old_state = RDMA_CM_ROUTE_QUERY;
2508 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2509 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2510}
2511
2512static void cma_init_resolve_addr_work(struct cma_work *work,
2513 struct rdma_id_private *id_priv)
2514{
2515 work->id = id_priv;
2516 INIT_WORK(&work->work, cma_work_handler);
2517 work->old_state = RDMA_CM_ADDR_QUERY;
2518 work->new_state = RDMA_CM_ADDR_RESOLVED;
2519 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2520}
2521
e51060f0
SH		 2522static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2523{
2524 struct rdma_route *route = &id_priv->id.route;
2525 struct cma_work *work;
2526 int ret;
2527
2528 work = kzalloc(sizeof *work, GFP_KERNEL);
2529 if (!work)
2530 return -ENOMEM;
2531
981b5a23 2532 cma_init_resolve_route_work(work, id_priv);
e51060f0
SH		 2533
2534 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2535 if (!route->path_rec) {
2536 ret = -ENOMEM;
2537 goto err1;
2538 }
2539
2540 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2541 if (ret)
2542 goto err2;
2543
2544 return 0;
2545err2:
2546 kfree(route->path_rec);
2547 route->path_rec = NULL;
2548err1:
2549 kfree(work);
2550 return ret;
2551}
2552
9327c7af
PP		 2553static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2554 unsigned long supported_gids,
2555 enum ib_gid_type default_gid)
2556{
2557 if ((network_type == RDMA_NETWORK_IPV4 ||
2558 network_type == RDMA_NETWORK_IPV6) &&
2559 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2560 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2561
2562 return default_gid;
2563}
2564
2565/*
2566 * cma_iboe_set_path_rec_l2_fields() is helper function which sets
2567 * path record type based on GID type.
2568 * It also sets up other L2 fields which includes destination mac address
2569 * netdev ifindex, of the path record.
2570 * It returns the netdev of the bound interface for this path record entry.
2571 */
2572static struct net_device *
2573cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
2574{
2575 struct rdma_route *route = &id_priv->id.route;
2576 enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
2577 struct rdma_addr *addr = &route->addr;
2578 unsigned long supported_gids;
2579 struct net_device *ndev;
2580
2581 if (!addr->dev_addr.bound_dev_if)
2582 return NULL;
2583
2584 ndev = dev_get_by_index(addr->dev_addr.net,
2585 addr->dev_addr.bound_dev_if);
2586 if (!ndev)
2587 return NULL;
2588
2589 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2590 id_priv->id.port_num);
2591 gid_type = cma_route_gid_type(addr->dev_addr.network,
2592 supported_gids,
2593 id_priv->gid_type);
2594 /* Use the hint from IP Stack to select GID Type */
2595 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2596 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2597 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2598
114cc9c4 2599 route->path_rec->roce.route_resolved = true;
9327c7af
PP		 2600 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2601 return ndev;
2602}
2603
fe75889f
PP		 2604int rdma_set_ib_path(struct rdma_cm_id *id,
2605 struct sa_path_rec *path_rec)
e51060f0
SH		 2606{
2607 struct rdma_id_private *id_priv;
8d20a1f0 2608 struct net_device *ndev;
e51060f0
SH		 2609 int ret;
2610
2611 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 2612 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2613 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 2614 return -EINVAL;
2615
fe75889f 2616 id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
9893e742 2617 GFP_KERNEL);
e51060f0
SH		 2618 if (!id->route.path_rec) {
2619 ret = -ENOMEM;
2620 goto err;
2621 }
2622
8d20a1f0
PP		 2623 if (rdma_protocol_roce(id->device, id->port_num)) {
2624 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2625 if (!ndev) {
2626 ret = -ENODEV;
2627 goto err_free;
2628 }
2629 dev_put(ndev);
2630 }
2631
fe75889f 2632 id->route.num_paths = 1;
e51060f0 2633 return 0;
8d20a1f0
PP		 2634
2635err_free:
2636 kfree(id->route.path_rec);
2637 id->route.path_rec = NULL;
e51060f0 2638err:
550e5ca7 2639 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2640 return ret;
2641}
fe75889f 2642EXPORT_SYMBOL(rdma_set_ib_path);
e51060f0 2643
07ebafba
TT		 2644static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2645{
2646 struct cma_work *work;
2647
2648 work = kzalloc(sizeof *work, GFP_KERNEL);
2649 if (!work)
2650 return -ENOMEM;
2651
981b5a23 2652 cma_init_resolve_route_work(work, id_priv);
07ebafba
TT		 2653 queue_work(cma_wq, &work->work);
2654 return 0;
2655}
2656
eb072c4b
EP		 2657static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2658{
2659 int prio;
2660 struct net_device *dev;
2661
2662 prio = rt_tos2priority(tos);
d0d7b10b 2663 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
eb072c4b
EP		 2664 if (dev->num_tc)
2665 return netdev_get_prio_tc_map(dev, prio);
2666
2667#if IS_ENABLED(CONFIG_VLAN_8021Q)
d0d7b10b 2668 if (is_vlan_dev(ndev))
eb072c4b
EP		 2669 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2670 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2671#endif
2672 return 0;
2673}
2674
3c86aa70
EC		 2675static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2676{
2677 struct rdma_route *route = &id_priv->id.route;
2678 struct rdma_addr *addr = &route->addr;
2679 struct cma_work *work;
2680 int ret;
4367ec7f 2681 struct net_device *ndev;
4367ec7f 2682
89052d78
MD		 2683 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2684 rdma_start_port(id_priv->cma_dev->device)];
2685 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
dd5f03be 2686
3c86aa70 2687
3c86aa70
EC		 2688 work = kzalloc(sizeof *work, GFP_KERNEL);
2689 if (!work)
2690 return -ENOMEM;
2691
3c86aa70
EC		 2692 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2693 if (!route->path_rec) {
2694 ret = -ENOMEM;
2695 goto err1;
2696 }
2697
2698 route->num_paths = 1;
2699
9327c7af 2700 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
3c86aa70
EC		 2701 if (!ndev) {
2702 ret = -ENODEV;
2703 goto err2;
2704 }
2705
7b85627b
MS		 2706 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2707 &route->path_rec->sgid);
2708 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2709 &route->path_rec->dgid);
af7bd463 2710
c3efe750 2711 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
c865f246 2712 /* TODO: get the hoplimit from the inet/inet6 device */
c3efe750
MB		 2713 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2714 else
c865f246 2715 route->path_rec->hop_limit = 1;
af7bd463
EC		 2716 route->path_rec->reversible = 1;
2717 route->path_rec->pkey = cpu_to_be16(0xffff);
2718 route->path_rec->mtu_selector = IB_SA_EQ;
89052d78
MD		 2719 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2720 route->path_rec->traffic_class = tos;
3c86aa70
EC		 2721 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2722 route->path_rec->rate_selector = IB_SA_EQ;
2723 route->path_rec->rate = iboe_get_rate(ndev);
2724 dev_put(ndev);
2725 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2726 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2727 if (!route->path_rec->mtu) {
2728 ret = -EINVAL;
2729 goto err2;
2730 }
2731
981b5a23 2732 cma_init_resolve_route_work(work, id_priv);
3c86aa70
EC		 2733 queue_work(cma_wq, &work->work);
2734
2735 return 0;
2736
2737err2:
2738 kfree(route->path_rec);
2739 route->path_rec = NULL;
2740err1:
2741 kfree(work);
2742 return ret;
2743}
2744
e51060f0
SH		 2745int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2746{
2747 struct rdma_id_private *id_priv;
2748 int ret;
2749
2750 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2751 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 2752 return -EINVAL;
2753
2754 atomic_inc(&id_priv->refcount);
fe53ba2f 2755 if (rdma_cap_ib_sa(id->device, id->port_num))
c72f2189 2756 ret = cma_resolve_ib_route(id_priv, timeout_ms);
5d9fb044 2757 else if (rdma_protocol_roce(id->device, id->port_num))
c72f2189
MW		 2758 ret = cma_resolve_iboe_route(id_priv);
2759 else if (rdma_protocol_iwarp(id->device, id->port_num))
07ebafba 2760 ret = cma_resolve_iw_route(id_priv, timeout_ms);
c72f2189 2761 else
e51060f0 2762 ret = -ENOSYS;
c72f2189 2763
e51060f0
SH		 2764 if (ret)
2765 goto err;
2766
2767 return 0;
2768err:
550e5ca7 2769 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2770 cma_deref_id(id_priv);
2771 return ret;
2772}
2773EXPORT_SYMBOL(rdma_resolve_route);
2774
6a3e362d
SH		 2775static void cma_set_loopback(struct sockaddr *addr)
2776{
2777 switch (addr->sa_family) {
2778 case AF_INET:
2779 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2780 break;
2781 case AF_INET6:
2782 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2783 0, 0, 0, htonl(1));
2784 break;
2785 default:
2786 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2787 0, 0, 0, htonl(1));
2788 break;
2789 }
2790}
2791
e51060f0
SH		 2792static int cma_bind_loopback(struct rdma_id_private *id_priv)
2793{
b0569e40 2794 struct cma_device *cma_dev, *cur_dev;
f0ee3404 2795 union ib_gid gid;
102c5ce0 2796 enum ib_port_state port_state;
e51060f0
SH		 2797 u16 pkey;
2798 int ret;
2799 u8 p;
2800
b0569e40 2801 cma_dev = NULL;
e51060f0 2802 mutex_lock(&lock);
b0569e40
SH		 2803 list_for_each_entry(cur_dev, &dev_list, list) {
2804 if (cma_family(id_priv) == AF_IB &&
72219cea 2805 !rdma_cap_ib_cm(cur_dev->device, 1))
b0569e40
SH		 2806 continue;
2807
2808 if (!cma_dev)
2809 cma_dev = cur_dev;
2810
2811 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
102c5ce0
JW		 2812 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2813 port_state == IB_PORT_ACTIVE) {
b0569e40
SH		 2814 cma_dev = cur_dev;
2815 goto port_found;
2816 }
2817 }
2818 }
2819
2820 if (!cma_dev) {
e82153b5
KK		 2821 ret = -ENODEV;
2822 goto out;
2823 }
e51060f0 2824
e82153b5 2825 p = 1;
e51060f0
SH		 2826
2827port_found:
1dfce294 2828 ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 2829 if (ret)
2830 goto out;
2831
2832 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2833 if (ret)
2834 goto out;
2835
6f8372b6 2836 id_priv->id.route.addr.dev_addr.dev_type =
21655afc 2837 (rdma_protocol_ib(cma_dev->device, p)) ?
6f8372b6
SH		 2838 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2839
2840 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 2841 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2842 id_priv->id.port_num = p;
2843 cma_attach_to_dev(id_priv, cma_dev);
f4753834 2844 cma_set_loopback(cma_src_addr(id_priv));
e51060f0
SH		 2845out:
2846 mutex_unlock(&lock);
2847 return ret;
2848}
2849
2850static void addr_handler(int status, struct sockaddr *src_addr,
2851 struct rdma_dev_addr *dev_addr, void *context)
2852{
2853 struct rdma_id_private *id_priv = context;
7582df82 2854 struct rdma_cm_event event = {};
e51060f0 2855
de910bd9 2856 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2857 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2858 RDMA_CM_ADDR_RESOLVED))
61a73c70 2859 goto out;
61a73c70 2860
7b85627b 2861 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
498683c6 2862 if (!status && !id_priv->cma_dev) {
be9130cc 2863 status = cma_acquire_dev(id_priv, NULL);
498683c6
MS		 2864 if (status)
2865 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
2866 status);
2867 } else {
2868 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
2869 }
e51060f0
SH		 2870
2871 if (status) {
550e5ca7
NM		 2872 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2873 RDMA_CM_ADDR_BOUND))
e51060f0 2874 goto out;
a1b1b61f
SH		 2875 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2876 event.status = status;
7b85627b 2877 } else
a1b1b61f 2878 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0 2879
a1b1b61f 2880 if (id_priv->id.event_handler(&id_priv->id, &event)) {
550e5ca7 2881 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2882 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2883 cma_deref_id(id_priv);
2884 rdma_destroy_id(&id_priv->id);
2885 return;
2886 }
2887out:
de910bd9 2888 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2889 cma_deref_id(id_priv);
2890}
2891
2892static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2893{
2894 struct cma_work *work;
f0ee3404 2895 union ib_gid gid;
e51060f0
SH		 2896 int ret;
2897
2898 work = kzalloc(sizeof *work, GFP_KERNEL);
2899 if (!work)
2900 return -ENOMEM;
2901
2902 if (!id_priv->cma_dev) {
2903 ret = cma_bind_loopback(id_priv);
2904 if (ret)
2905 goto err;
2906 }
2907
6f8372b6
SH		 2908 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2909 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2910
981b5a23 2911 cma_init_resolve_addr_work(work, id_priv);
e51060f0
SH		 2912 queue_work(cma_wq, &work->work);
2913 return 0;
2914err:
2915 kfree(work);
2916 return ret;
2917}
2918
f17df3b0
SH		 2919static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2920{
2921 struct cma_work *work;
2922 int ret;
2923
2924 work = kzalloc(sizeof *work, GFP_KERNEL);
2925 if (!work)
2926 return -ENOMEM;
2927
2928 if (!id_priv->cma_dev) {
2929 ret = cma_resolve_ib_dev(id_priv);
2930 if (ret)
2931 goto err;
2932 }
2933
2934 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2935 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2936
981b5a23 2937 cma_init_resolve_addr_work(work, id_priv);
f17df3b0
SH		 2938 queue_work(cma_wq, &work->work);
2939 return 0;
2940err:
2941 kfree(work);
2942 return ret;
2943}
2944
e51060f0 2945static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2df7dba8 2946 const struct sockaddr *dst_addr)
e51060f0 2947{
d14714df
SH		 2948 if (!src_addr || !src_addr->sa_family) {
2949 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
f17df3b0 2950 src_addr->sa_family = dst_addr->sa_family;
b4cfe397
JM		 2951 if (IS_ENABLED(CONFIG_IPV6) &&
2952 dst_addr->sa_family == AF_INET6) {
6c26a771
SB		 2953 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2954 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2955 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2956 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2957 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
f17df3b0
SH		 2958 } else if (dst_addr->sa_family == AF_IB) {
2959 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2960 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
d14714df
SH		 2961 }
2962 }
2963 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2964}
2965
2966int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2df7dba8 2967 const struct sockaddr *dst_addr, int timeout_ms)
e51060f0
SH		 2968{
2969 struct rdma_id_private *id_priv;
2970 int ret;
2971
2972 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2973 if (id_priv->state == RDMA_CM_IDLE) {
e51060f0 2974 ret = cma_bind_addr(id, src_addr, dst_addr);
219d2e9d 2975 if (ret)
e51060f0
SH		 2976 return ret;
2977 }
2978
219d2e9d 2979 if (cma_family(id_priv) != dst_addr->sa_family)
4ae7152e
SH		 2980 return -EINVAL;
2981
219d2e9d 2982 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
e51060f0
SH		 2983 return -EINVAL;
2984
219d2e9d 2985 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
e51060f0 2986 atomic_inc(&id_priv->refcount);
f17df3b0 2987 if (cma_any_addr(dst_addr)) {
e51060f0 2988 ret = cma_resolve_loopback(id_priv);
f17df3b0
SH		 2989 } else {
2990 if (dst_addr->sa_family == AF_IB) {
2991 ret = cma_resolve_ib_addr(id_priv);
2992 } else {
ee6548d1 2993 ret = rdma_resolve_ip(cma_src_addr(id_priv),
f17df3b0
SH		 2994 dst_addr, &id->route.addr.dev_addr,
2995 timeout_ms, addr_handler, id_priv);
2996 }
2997 }
e51060f0
SH		 2998 if (ret)
2999 goto err;
3000
3001 return 0;
3002err:
550e5ca7 3003 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 3004 cma_deref_id(id_priv);
3005 return ret;
3006}
3007EXPORT_SYMBOL(rdma_resolve_addr);
3008
a9bb7912
HS		 3009int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
3010{
3011 struct rdma_id_private *id_priv;
3012 unsigned long flags;
3013 int ret;
3014
3015 id_priv = container_of(id, struct rdma_id_private, id);
3016 spin_lock_irqsave(&id_priv->lock, flags);
c8dea2f9 3017 if (reuse || id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 3018 id_priv->reuseaddr = reuse;
3019 ret = 0;
3020 } else {
3021 ret = -EINVAL;
3022 }
3023 spin_unlock_irqrestore(&id_priv->lock, flags);
3024 return ret;
3025}
3026EXPORT_SYMBOL(rdma_set_reuseaddr);
3027
68602120
SH		 3028int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3029{
3030 struct rdma_id_private *id_priv;
3031 unsigned long flags;
3032 int ret;
3033
3034 id_priv = container_of(id, struct rdma_id_private, id);
3035 spin_lock_irqsave(&id_priv->lock, flags);
3036 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3037 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3038 id_priv->afonly = afonly;
3039 ret = 0;
3040 } else {
3041 ret = -EINVAL;
3042 }
3043 spin_unlock_irqrestore(&id_priv->lock, flags);
3044 return ret;
3045}
3046EXPORT_SYMBOL(rdma_set_afonly);
3047
e51060f0
SH		 3048static void cma_bind_port(struct rdma_bind_list *bind_list,
3049 struct rdma_id_private *id_priv)
3050{
58afdcb7
SH		 3051 struct sockaddr *addr;
3052 struct sockaddr_ib *sib;
3053 u64 sid, mask;
3054 __be16 port;
e51060f0 3055
f4753834 3056 addr = cma_src_addr(id_priv);
58afdcb7
SH		 3057 port = htons(bind_list->port);
3058
3059 switch (addr->sa_family) {
3060 case AF_INET:
3061 ((struct sockaddr_in *) addr)->sin_port = port;
3062 break;
3063 case AF_INET6:
3064 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3065 break;
3066 case AF_IB:
3067 sib = (struct sockaddr_ib *) addr;
3068 sid = be64_to_cpu(sib->sib_sid);
3069 mask = be64_to_cpu(sib->sib_sid_mask);
3070 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3071 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3072 break;
3073 }
e51060f0
SH		 3074 id_priv->bind_list = bind_list;
3075 hlist_add_head(&id_priv->node, &bind_list->owners);
3076}
3077
2253fc0c 3078static int cma_alloc_port(enum rdma_ucm_port_space ps,
aac978e1 3079 struct rdma_id_private *id_priv, unsigned short snum)
e51060f0
SH		 3080{
3081 struct rdma_bind_list *bind_list;
3b069c5d 3082 int ret;
e51060f0 3083
cb164b8c 3084 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 3085 if (!bind_list)
3086 return -ENOMEM;
3087
fa20105e
GS		 3088 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3089 snum);
3b069c5d
TH		 3090 if (ret < 0)
3091 goto err;
aedec080
SH		 3092
3093 bind_list->ps = ps;
3b069c5d 3094 bind_list->port = (unsigned short)ret;
aedec080
SH		 3095 cma_bind_port(bind_list, id_priv);
3096 return 0;
3b069c5d 3097err:
aedec080 3098 kfree(bind_list);
3b069c5d 3099 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
aedec080 3100}
e51060f0 3101
19b752a1
MS		 3102static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3103 struct rdma_id_private *id_priv)
3104{
3105 struct rdma_id_private *cur_id;
3106 struct sockaddr *daddr = cma_dst_addr(id_priv);
3107 struct sockaddr *saddr = cma_src_addr(id_priv);
3108 __be16 dport = cma_port(daddr);
3109
3110 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3111 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3112 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3113 __be16 cur_dport = cma_port(cur_daddr);
3114
3115 if (id_priv == cur_id)
3116 continue;
3117
3118 /* different dest port -> unique */
9dea9a2f
TN		 3119 if (!cma_any_port(daddr) &&
3120 !cma_any_port(cur_daddr) &&
19b752a1
MS		 3121 (dport != cur_dport))
3122 continue;
3123
3124 /* different src address -> unique */
3125 if (!cma_any_addr(saddr) &&
3126 !cma_any_addr(cur_saddr) &&
3127 cma_addr_cmp(saddr, cur_saddr))
3128 continue;
3129
3130 /* different dst address -> unique */
9dea9a2f
TN		 3131 if (!cma_any_addr(daddr) &&
3132 !cma_any_addr(cur_daddr) &&
19b752a1
MS		 3133 cma_addr_cmp(daddr, cur_daddr))
3134 continue;
3135
3136 return -EADDRNOTAVAIL;
3137 }
3138 return 0;
3139}
3140
2253fc0c 3141static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
aac978e1 3142 struct rdma_id_private *id_priv)
aedec080 3143{
5d7220e8
TH		 3144 static unsigned int last_used_port;
3145 int low, high, remaining;
3146 unsigned int rover;
fa20105e 3147 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0 3148
fa20105e 3149 inet_get_local_port_range(net, &low, &high);
5d7220e8 3150 remaining = (high - low) + 1;
63862b5b 3151 rover = prandom_u32() % remaining + low;
5d7220e8 3152retry:
19b752a1
MS		 3153 if (last_used_port != rover) {
3154 struct rdma_bind_list *bind_list;
3155 int ret;
3156
3157 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3158
3159 if (!bind_list) {
3160 ret = cma_alloc_port(ps, id_priv, rover);
3161 } else {
3162 ret = cma_port_is_unique(bind_list, id_priv);
3163 if (!ret)
3164 cma_bind_port(bind_list, id_priv);
3165 }
5d7220e8
TH		 3166 /*
3167 * Remember previously used port number in order to avoid
3168 * re-using same port immediately after it is closed.
3169 */
3170 if (!ret)
3171 last_used_port = rover;
3172 if (ret != -EADDRNOTAVAIL)
3173 return ret;
e51060f0 3174 }
5d7220e8
TH		 3175 if (--remaining) {
3176 rover++;
3177 if ((rover < low) || (rover > high))
3178 rover = low;
3179 goto retry;
3180 }
3181 return -EADDRNOTAVAIL;
e51060f0
SH		 3182}
3183
a9bb7912
HS		 3184/*
3185 * Check that the requested port is available. This is called when trying to
3186 * bind to a specific port, or when trying to listen on a bound port. In
3187 * the latter case, the provided id_priv may already be on the bind_list, but
3188 * we still need to check that it's okay to start listening.
3189 */
3190static int cma_check_port(struct rdma_bind_list *bind_list,
3191 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 3192{
3193 struct rdma_id_private *cur_id;
43b752da 3194 struct sockaddr *addr, *cur_addr;
e51060f0 3195
f4753834 3196 addr = cma_src_addr(id_priv);
b67bfe0d 3197 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
a9bb7912
HS		 3198 if (id_priv == cur_id)
3199 continue;
3cd96564 3200
5b0ec991
SH		 3201 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3202 cur_id->reuseaddr)
3203 continue;
e51060f0 3204
f4753834 3205 cur_addr = cma_src_addr(cur_id);
5b0ec991
SH		 3206 if (id_priv->afonly && cur_id->afonly &&
3207 (addr->sa_family != cur_addr->sa_family))
3208 continue;
3209
3210 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3211 return -EADDRNOTAVAIL;
3212
3213 if (!cma_addr_cmp(addr, cur_addr))
3214 return -EADDRINUSE;
a9bb7912 3215 }
e51060f0
SH		 3216 return 0;
3217}
3218
2253fc0c 3219static int cma_use_port(enum rdma_ucm_port_space ps,
aac978e1 3220 struct rdma_id_private *id_priv)
a9bb7912
HS		 3221{
3222 struct rdma_bind_list *bind_list;
3223 unsigned short snum;
3224 int ret;
3225
f4753834 3226 snum = ntohs(cma_port(cma_src_addr(id_priv)));
a9bb7912
HS		 3227 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3228 return -EACCES;
3229
fa20105e 3230 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
a9bb7912
HS		 3231 if (!bind_list) {
3232 ret = cma_alloc_port(ps, id_priv, snum);
3233 } else {
3234 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3235 if (!ret)
3236 cma_bind_port(bind_list, id_priv);
3237 }
3238 return ret;
3239}
3240
3241static int cma_bind_listen(struct rdma_id_private *id_priv)
3242{
3243 struct rdma_bind_list *bind_list = id_priv->bind_list;
3244 int ret = 0;
3245
3246 mutex_lock(&lock);
3247 if (bind_list->owners.first->next)
3248 ret = cma_check_port(bind_list, id_priv, 0);
3249 mutex_unlock(&lock);
3250 return ret;
3251}
3252
2253fc0c
SW		 3253static enum rdma_ucm_port_space
3254cma_select_inet_ps(struct rdma_id_private *id_priv)
e51060f0 3255{
e51060f0 3256 switch (id_priv->id.ps) {
e51060f0 3257 case RDMA_PS_TCP:
628e5f6d 3258 case RDMA_PS_UDP:
c8f6a362 3259 case RDMA_PS_IPOIB:
2d2e9415 3260 case RDMA_PS_IB:
aac978e1 3261 return id_priv->id.ps;
e51060f0 3262 default:
aac978e1
HE		 3263
3264 return 0;
58afdcb7
SH		 3265 }
3266}
3267
2253fc0c
SW		 3268static enum rdma_ucm_port_space
3269cma_select_ib_ps(struct rdma_id_private *id_priv)
58afdcb7 3270{
2253fc0c 3271 enum rdma_ucm_port_space ps = 0;
58afdcb7
SH		 3272 struct sockaddr_ib *sib;
3273 u64 sid_ps, mask, sid;
3274
f4753834 3275 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
58afdcb7
SH		 3276 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3277 sid = be64_to_cpu(sib->sib_sid) & mask;
3278
3279 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3280 sid_ps = RDMA_IB_IP_PS_IB;
aac978e1 3281 ps = RDMA_PS_IB;
58afdcb7
SH		 3282 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3283 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3284 sid_ps = RDMA_IB_IP_PS_TCP;
aac978e1 3285 ps = RDMA_PS_TCP;
58afdcb7
SH		 3286 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3287 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3288 sid_ps = RDMA_IB_IP_PS_UDP;
aac978e1 3289 ps = RDMA_PS_UDP;
e51060f0
SH		 3290 }
3291
58afdcb7
SH		 3292 if (ps) {
3293 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3294 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3295 be64_to_cpu(sib->sib_sid_mask));
3296 }
3297 return ps;
3298}
3299
3300static int cma_get_port(struct rdma_id_private *id_priv)
3301{
2253fc0c 3302 enum rdma_ucm_port_space ps;
58afdcb7
SH		 3303 int ret;
3304
f4753834 3305 if (cma_family(id_priv) != AF_IB)
58afdcb7
SH		 3306 ps = cma_select_inet_ps(id_priv);
3307 else
3308 ps = cma_select_ib_ps(id_priv);
3309 if (!ps)
3310 return -EPROTONOSUPPORT;
3311
e51060f0 3312 mutex_lock(&lock);
f4753834 3313 if (cma_any_port(cma_src_addr(id_priv)))
aedec080 3314 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 3315 else
3316 ret = cma_use_port(ps, id_priv);
3317 mutex_unlock(&lock);
3318
3319 return ret;
3320}
3321
d14714df
SH		 3322static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3323 struct sockaddr *addr)
3324{
d90f9b35 3325#if IS_ENABLED(CONFIG_IPV6)
d14714df
SH		 3326 struct sockaddr_in6 *sin6;
3327
3328 if (addr->sa_family != AF_INET6)
3329 return 0;
3330
3331 sin6 = (struct sockaddr_in6 *) addr;
5462eddd
SK		 3332
3333 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3334 return 0;
3335
3336 if (!sin6->sin6_scope_id)
d14714df
SH		 3337 return -EINVAL;
3338
3339 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3340#endif
3341 return 0;
3342}
3343
a9bb7912
HS		 3344int rdma_listen(struct rdma_cm_id *id, int backlog)
3345{
3346 struct rdma_id_private *id_priv;
3347 int ret;
3348
3349 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3350 if (id_priv->state == RDMA_CM_IDLE) {
f4753834
SH		 3351 id->route.addr.src_addr.ss_family = AF_INET;
3352 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
a9bb7912
HS		 3353 if (ret)
3354 return ret;
3355 }
3356
550e5ca7 3357 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
a9bb7912
HS		 3358 return -EINVAL;
3359
3360 if (id_priv->reuseaddr) {
3361 ret = cma_bind_listen(id_priv);
3362 if (ret)
3363 goto err;
3364 }
3365
3366 id_priv->backlog = backlog;
3367 if (id->device) {
72219cea 3368 if (rdma_cap_ib_cm(id->device, 1)) {
a9bb7912
HS		 3369 ret = cma_ib_listen(id_priv);
3370 if (ret)
3371 goto err;
04215330 3372 } else if (rdma_cap_iw_cm(id->device, 1)) {
a9bb7912
HS		 3373 ret = cma_iw_listen(id_priv, backlog);
3374 if (ret)
3375 goto err;
21655afc 3376 } else {
a9bb7912
HS		 3377 ret = -ENOSYS;
3378 goto err;
3379 }
3380 } else
3381 cma_listen_on_all(id_priv);
3382
3383 return 0;
3384err:
3385 id_priv->backlog = 0;
550e5ca7 3386 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 3387 return ret;
3388}
3389EXPORT_SYMBOL(rdma_listen);
3390
e51060f0
SH		 3391int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3392{
3393 struct rdma_id_private *id_priv;
3394 int ret;
6df6b4a9 3395 struct sockaddr *daddr;
e51060f0 3396
680f920a
SH		 3397 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3398 addr->sa_family != AF_IB)
e51060f0
SH		 3399 return -EAFNOSUPPORT;
3400
3401 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3402 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 3403 return -EINVAL;
3404
d14714df
SH		 3405 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3406 if (ret)
3407 goto err1;
3408
7b85627b 3409 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
8523c048 3410 if (!cma_any_addr(addr)) {
680f920a 3411 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
e51060f0 3412 if (ret)
255d0c14
KK		 3413 goto err1;
3414
be9130cc 3415 ret = cma_acquire_dev(id_priv, NULL);
255d0c14
KK		 3416 if (ret)
3417 goto err1;
e51060f0
SH		 3418 }
3419
68602120
SH		 3420 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3421 if (addr->sa_family == AF_INET)
3422 id_priv->afonly = 1;
5b0ec991 3423#if IS_ENABLED(CONFIG_IPV6)
fa20105e
GS		 3424 else if (addr->sa_family == AF_INET6) {
3425 struct net *net = id_priv->id.route.addr.dev_addr.net;
3426
3427 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3428 }
5b0ec991 3429#endif
68602120 3430 }
9dea9a2f
TN		 3431 daddr = cma_dst_addr(id_priv);
3432 daddr->sa_family = addr->sa_family;
3433
e51060f0
SH		 3434 ret = cma_get_port(id_priv);
3435 if (ret)
255d0c14 3436 goto err2;
e51060f0
SH		 3437
3438 return 0;
255d0c14 3439err2:
00313983
SW		 3440 if (id_priv->cma_dev) {
3441 rdma_restrack_del(&id_priv->res);
a396d43a 3442 cma_release_dev(id_priv);
00313983 3443 }
255d0c14 3444err1:
550e5ca7 3445 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 3446 return ret;
3447}
3448EXPORT_SYMBOL(rdma_bind_addr);
3449
f4753834 3450static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
e51060f0 3451{
e51060f0 3452 struct cma_hdr *cma_hdr;
e51060f0 3453
01602f11
SH		 3454 cma_hdr = hdr;
3455 cma_hdr->cma_version = CMA_VERSION;
f4753834 3456 if (cma_family(id_priv) == AF_INET) {
1f5175ad
AS		 3457 struct sockaddr_in *src4, *dst4;
3458
f4753834
SH		 3459 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3460 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
1f5175ad 3461
01602f11
SH		 3462 cma_set_ip_ver(cma_hdr, 4);
3463 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3464 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3465 cma_hdr->port = src4->sin_port;
e8160e15 3466 } else if (cma_family(id_priv) == AF_INET6) {
1f5175ad
AS		 3467 struct sockaddr_in6 *src6, *dst6;
3468
f4753834
SH		 3469 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3470 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
1f5175ad 3471
01602f11
SH		 3472 cma_set_ip_ver(cma_hdr, 6);
3473 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3474 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3475 cma_hdr->port = src6->sin6_port;
e51060f0
SH		 3476 }
3477 return 0;
3478}
3479
628e5f6d 3480static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
e7ff98ae 3481 const struct ib_cm_event *ib_event)
628e5f6d
SH		 3482{
3483 struct rdma_id_private *id_priv = cm_id->context;
7582df82 3484 struct rdma_cm_event event = {};
e7ff98ae
PP		 3485 const struct ib_cm_sidr_rep_event_param *rep =
3486 &ib_event->param.sidr_rep_rcvd;
628e5f6d
SH		 3487 int ret = 0;
3488
37e07cda
BVA		 3489 mutex_lock(&id_priv->handler_mutex);
3490 if (id_priv->state != RDMA_CM_CONNECT)
3491 goto out;
628e5f6d
SH		 3492
3493 switch (ib_event->event) {
3494 case IB_CM_SIDR_REQ_ERROR:
3495 event.event = RDMA_CM_EVENT_UNREACHABLE;
3496 event.status = -ETIMEDOUT;
3497 break;
3498 case IB_CM_SIDR_REP_RECEIVED:
3499 event.param.ud.private_data = ib_event->private_data;
3500 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3501 if (rep->status != IB_SIDR_SUCCESS) {
3502 event.event = RDMA_CM_EVENT_UNREACHABLE;
3503 event.status = ib_event->param.sidr_rep_rcvd.status;
498683c6
MS		 3504 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3505 event.status);
628e5f6d
SH		 3506 break;
3507 }
5c438135 3508 ret = cma_set_qkey(id_priv, rep->qkey);
d2ca39f2 3509 if (ret) {
498683c6 3510 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
d2ca39f2 3511 event.event = RDMA_CM_EVENT_ADDR_ERROR;
5c438135 3512 event.status = ret;
628e5f6d
SH		 3513 break;
3514 }
4ad6a024
PP		 3515 ib_init_ah_attr_from_path(id_priv->id.device,
3516 id_priv->id.port_num,
3517 id_priv->id.route.path_rec,
39839107
PP		 3518 &event.param.ud.ah_attr,
3519 rep->sgid_attr);
628e5f6d
SH		 3520 event.param.ud.qp_num = rep->qpn;
3521 event.param.ud.qkey = rep->qkey;
3522 event.event = RDMA_CM_EVENT_ESTABLISHED;
3523 event.status = 0;
3524 break;
3525 default:
aba25a3e 3526 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 3527 ib_event->event);
3528 goto out;
3529 }
3530
3531 ret = id_priv->id.event_handler(&id_priv->id, &event);
aa74f487
PP		 3532
3533 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
628e5f6d
SH		 3534 if (ret) {
3535 /* Destroy the CM ID by returning a non-zero value. */
3536 id_priv->cm_id.ib = NULL;
550e5ca7 3537 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 3538 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 3539 rdma_destroy_id(&id_priv->id);
3540 return ret;
3541 }
3542out:
de910bd9 3543 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 3544 return ret;
3545}
3546
3547static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3548 struct rdma_conn_param *conn_param)
3549{
3550 struct ib_cm_sidr_req_param req;
0c9361fc 3551 struct ib_cm_id *id;
e511d1ae 3552 void *private_data;
c0b64f58
BVA		 3553 u8 offset;
3554 int ret;
628e5f6d 3555
e511d1ae 3556 memset(&req, 0, sizeof req);
e8160e15
SH		 3557 offset = cma_user_data_offset(id_priv);
3558 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 3559 if (req.private_data_len < conn_param->private_data_len)
3560 return -EINVAL;
3561
e8160e15 3562 if (req.private_data_len) {
e511d1ae
SH		 3563 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3564 if (!private_data)
e8160e15
SH		 3565 return -ENOMEM;
3566 } else {
e511d1ae 3567 private_data = NULL;
e8160e15 3568 }
628e5f6d
SH		 3569
3570 if (conn_param->private_data && conn_param->private_data_len)
e511d1ae
SH		 3571 memcpy(private_data + offset, conn_param->private_data,
3572 conn_param->private_data_len);
628e5f6d 3573
e511d1ae
SH		 3574 if (private_data) {
3575 ret = cma_format_hdr(private_data, id_priv);
e8160e15
SH		 3576 if (ret)
3577 goto out;
e511d1ae 3578 req.private_data = private_data;
e8160e15 3579 }
628e5f6d 3580
0c9361fc
JM		 3581 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3582 id_priv);
3583 if (IS_ERR(id)) {
3584 ret = PTR_ERR(id);
628e5f6d
SH		 3585 goto out;
3586 }
0c9361fc 3587 id_priv->cm_id.ib = id;
628e5f6d 3588
f4753834 3589 req.path = id_priv->id.route.path_rec;
815d456e 3590 req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
cf53936f 3591 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
628e5f6d
SH		 3592 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3593 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3594
3595 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3596 if (ret) {
3597 ib_destroy_cm_id(id_priv->cm_id.ib);
3598 id_priv->cm_id.ib = NULL;
3599 }
3600out:
e511d1ae 3601 kfree(private_data);
628e5f6d
SH		 3602 return ret;
3603}
3604
e51060f0
SH		 3605static int cma_connect_ib(struct rdma_id_private *id_priv,
3606 struct rdma_conn_param *conn_param)
3607{
3608 struct ib_cm_req_param req;
3609 struct rdma_route *route;
3610 void *private_data;
0c9361fc 3611 struct ib_cm_id *id;
c0b64f58
BVA		 3612 u8 offset;
3613 int ret;
e51060f0
SH		 3614
3615 memset(&req, 0, sizeof req);
e8160e15 3616 offset = cma_user_data_offset(id_priv);
e51060f0 3617 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 3618 if (req.private_data_len < conn_param->private_data_len)
3619 return -EINVAL;
3620
e8160e15
SH		 3621 if (req.private_data_len) {
3622 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3623 if (!private_data)
3624 return -ENOMEM;
3625 } else {
3626 private_data = NULL;
3627 }
e51060f0
SH		 3628
3629 if (conn_param->private_data && conn_param->private_data_len)
3630 memcpy(private_data + offset, conn_param->private_data,
3631 conn_param->private_data_len);
3632
0c9361fc
JM		 3633 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3634 if (IS_ERR(id)) {
3635 ret = PTR_ERR(id);
e51060f0
SH		 3636 goto out;
3637 }
0c9361fc 3638 id_priv->cm_id.ib = id;
e51060f0
SH		 3639
3640 route = &id_priv->id.route;
e8160e15
SH		 3641 if (private_data) {
3642 ret = cma_format_hdr(private_data, id_priv);
3643 if (ret)
3644 goto out;
3645 req.private_data = private_data;
3646 }
e51060f0
SH		 3647
3648 req.primary_path = &route->path_rec[0];
3649 if (route->num_paths == 2)
3650 req.alternate_path = &route->path_rec[1];
3651
815d456e
PP		 3652 req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3653 /* Alternate path SGID attribute currently unsupported */
cf53936f 3654 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
e51060f0 3655 req.qp_num = id_priv->qp_num;
18c441a6 3656 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 3657 req.starting_psn = id_priv->seq_num;
3658 req.responder_resources = conn_param->responder_resources;
3659 req.initiator_depth = conn_param->initiator_depth;
3660 req.flow_control = conn_param->flow_control;
4ede178a
SH		 3661 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3662 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 3663 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3664 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3665 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3666 req.srq = id_priv->srq ? 1 : 0;
3667
3668 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3669out:
0c9361fc
JM		 3670 if (ret && !IS_ERR(id)) {
3671 ib_destroy_cm_id(id);
675a027c
KK		 3672 id_priv->cm_id.ib = NULL;
3673 }
3674
e51060f0
SH		 3675 kfree(private_data);
3676 return ret;
3677}
3678
07ebafba
TT		 3679static int cma_connect_iw(struct rdma_id_private *id_priv,
3680 struct rdma_conn_param *conn_param)
3681{
3682 struct iw_cm_id *cm_id;
07ebafba
TT		 3683 int ret;
3684 struct iw_cm_conn_param iw_param;
3685
3686 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 3687 if (IS_ERR(cm_id))
3688 return PTR_ERR(cm_id);
07ebafba 3689
68cdba06 3690 cm_id->tos = id_priv->tos;
07ebafba
TT		 3691 id_priv->cm_id.iw = cm_id;
3692
24d44a39
SW		 3693 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3694 rdma_addr_size(cma_src_addr(id_priv)));
3695 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3696 rdma_addr_size(cma_dst_addr(id_priv)));
07ebafba 3697
5851bb89 3698 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 3699 if (ret)
3700 goto out;
07ebafba 3701
f45ee80e
HS		 3702 if (conn_param) {
3703 iw_param.ord = conn_param->initiator_depth;
3704 iw_param.ird = conn_param->responder_resources;
3705 iw_param.private_data = conn_param->private_data;
3706 iw_param.private_data_len = conn_param->private_data_len;
3707 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3708 } else {
3709 memset(&iw_param, 0, sizeof iw_param);
07ebafba 3710 iw_param.qpn = id_priv->qp_num;
f45ee80e 3711 }
07ebafba
TT		 3712 ret = iw_cm_connect(cm_id, &iw_param);
3713out:
0c9361fc 3714 if (ret) {
675a027c
KK		 3715 iw_destroy_cm_id(cm_id);
3716 id_priv->cm_id.iw = NULL;
3717 }
07ebafba
TT		 3718 return ret;
3719}
3720
e51060f0
SH		 3721int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3722{
3723 struct rdma_id_private *id_priv;
3724 int ret;
3725
3726 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3727 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
e51060f0
SH		 3728 return -EINVAL;
3729
3730 if (!id->qp) {
3731 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3732 id_priv->srq = conn_param->srq;
3733 }
3734
72219cea 3735 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 3736 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 3737 ret = cma_resolve_ib_udp(id_priv, conn_param);
3738 else
3739 ret = cma_connect_ib(id_priv, conn_param);
04215330 3740 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 3741 ret = cma_connect_iw(id_priv, conn_param);
21655afc 3742 else
e51060f0 3743 ret = -ENOSYS;
e51060f0
SH		 3744 if (ret)
3745 goto err;
3746
3747 return 0;
3748err:
550e5ca7 3749 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
e51060f0
SH		 3750 return ret;
3751}
3752EXPORT_SYMBOL(rdma_connect);
3753
3754static int cma_accept_ib(struct rdma_id_private *id_priv,
3755 struct rdma_conn_param *conn_param)
3756{
3757 struct ib_cm_rep_param rep;
5851bb89 3758 int ret;
0fe313b0 3759
5851bb89
SH		 3760 ret = cma_modify_qp_rtr(id_priv, conn_param);
3761 if (ret)
3762 goto out;
0fe313b0 3763
5851bb89
SH		 3764 ret = cma_modify_qp_rts(id_priv, conn_param);
3765 if (ret)
3766 goto out;
e51060f0
SH		 3767
3768 memset(&rep, 0, sizeof rep);
3769 rep.qp_num = id_priv->qp_num;
3770 rep.starting_psn = id_priv->seq_num;
3771 rep.private_data = conn_param->private_data;
3772 rep.private_data_len = conn_param->private_data_len;
3773 rep.responder_resources = conn_param->responder_resources;
3774 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 3775 rep.failover_accepted = 0;
3776 rep.flow_control = conn_param->flow_control;
4ede178a 3777 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 3778 rep.srq = id_priv->srq ? 1 : 0;
3779
0fe313b0
SH		 3780 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3781out:
3782 return ret;
e51060f0
SH		 3783}
3784
07ebafba
TT		 3785static int cma_accept_iw(struct rdma_id_private *id_priv,
3786 struct rdma_conn_param *conn_param)
3787{
3788 struct iw_cm_conn_param iw_param;
3789 int ret;
3790
f2625f7d
SW		 3791 if (!conn_param)
3792 return -EINVAL;
3793
5851bb89 3794 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 3795 if (ret)
3796 return ret;
3797
3798 iw_param.ord = conn_param->initiator_depth;
3799 iw_param.ird = conn_param->responder_resources;
3800 iw_param.private_data = conn_param->private_data;
3801 iw_param.private_data_len = conn_param->private_data_len;
3802 if (id_priv->id.qp) {
3803 iw_param.qpn = id_priv->qp_num;
3804 } else
3805 iw_param.qpn = conn_param->qp_num;
3806
3807 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3808}
3809
628e5f6d 3810static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
5c438135 3811 enum ib_cm_sidr_status status, u32 qkey,
628e5f6d
SH		 3812 const void *private_data, int private_data_len)
3813{
3814 struct ib_cm_sidr_rep_param rep;
d2ca39f2 3815 int ret;
628e5f6d
SH		 3816
3817 memset(&rep, 0, sizeof rep);
3818 rep.status = status;
3819 if (status == IB_SIDR_SUCCESS) {
5c438135 3820 ret = cma_set_qkey(id_priv, qkey);
d2ca39f2
YE		 3821 if (ret)
3822 return ret;
628e5f6d 3823 rep.qp_num = id_priv->qp_num;
c8f6a362 3824 rep.qkey = id_priv->qkey;
628e5f6d
SH		 3825 }
3826 rep.private_data = private_data;
3827 rep.private_data_len = private_data_len;
3828
3829 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3830}
3831
00313983
SW		 3832int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
3833 const char *caller)
e51060f0
SH		 3834{
3835 struct rdma_id_private *id_priv;
3836 int ret;
3837
3838 id_priv = container_of(id, struct rdma_id_private, id);
83e9502d 3839
00313983
SW		 3840 if (caller)
3841 id_priv->res.kern_name = caller;
3842 else
3843 rdma_restrack_set_task(&id_priv->res, current);
83e9502d 3844
550e5ca7 3845 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
e51060f0
SH		 3846 return -EINVAL;
3847
3848 if (!id->qp && conn_param) {
3849 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3850 id_priv->srq = conn_param->srq;
3851 }
3852
72219cea 3853 if (rdma_cap_ib_cm(id->device, id->port_num)) {
f45ee80e
HS		 3854 if (id->qp_type == IB_QPT_UD) {
3855 if (conn_param)
3856 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3857 conn_param->qkey,
f45ee80e
HS		 3858 conn_param->private_data,
3859 conn_param->private_data_len);
3860 else
3861 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3862 0, NULL, 0);
f45ee80e
HS		 3863 } else {
3864 if (conn_param)
3865 ret = cma_accept_ib(id_priv, conn_param);
3866 else
3867 ret = cma_rep_recv(id_priv);
3868 }
04215330 3869 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 3870 ret = cma_accept_iw(id_priv, conn_param);
21655afc 3871 else
e51060f0 3872 ret = -ENOSYS;
e51060f0
SH		 3873
3874 if (ret)
3875 goto reject;
3876
3877 return 0;
3878reject:
c5483388 3879 cma_modify_qp_err(id_priv);
e51060f0
SH		 3880 rdma_reject(id, NULL, 0);
3881 return ret;
3882}
00313983 3883EXPORT_SYMBOL(__rdma_accept);
e51060f0 3884
0fe313b0
SH		 3885int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3886{
3887 struct rdma_id_private *id_priv;
3888 int ret;
3889
3890 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3891 if (!id_priv->cm_id.ib)
0fe313b0
SH		 3892 return -EINVAL;
3893
3894 switch (id->device->node_type) {
3895 case RDMA_NODE_IB_CA:
3896 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3897 break;
3898 default:
3899 ret = 0;
3900 break;
3901 }
3902 return ret;
3903}
3904EXPORT_SYMBOL(rdma_notify);
3905
e51060f0
SH		 3906int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3907 u8 private_data_len)
3908{
3909 struct rdma_id_private *id_priv;
3910 int ret;
3911
3912 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3913 if (!id_priv->cm_id.ib)
e51060f0
SH		 3914 return -EINVAL;
3915
72219cea 3916 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 3917 if (id->qp_type == IB_QPT_UD)
5c438135 3918 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
628e5f6d
SH		 3919 private_data, private_data_len);
3920 else
3921 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3922 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3923 0, private_data, private_data_len);
04215330 3924 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba
TT		 3925 ret = iw_cm_reject(id_priv->cm_id.iw,
3926 private_data, private_data_len);
21655afc 3927 } else
e51060f0 3928 ret = -ENOSYS;
21655afc 3929
e51060f0
SH		 3930 return ret;
3931}
3932EXPORT_SYMBOL(rdma_reject);
3933
3934int rdma_disconnect(struct rdma_cm_id *id)
3935{
3936 struct rdma_id_private *id_priv;
3937 int ret;
3938
3939 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3940 if (!id_priv->cm_id.ib)
e51060f0
SH		 3941 return -EINVAL;
3942
72219cea 3943 if (rdma_cap_ib_cm(id->device, id->port_num)) {
c5483388 3944 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 3945 if (ret)
3946 goto out;
e51060f0
SH		 3947 /* Initiate or respond to a disconnect. */
3948 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3949 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
04215330 3950 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba 3951 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
21655afc 3952 } else
07ebafba 3953 ret = -EINVAL;
21655afc 3954
e51060f0
SH		 3955out:
3956 return ret;
3957}
3958EXPORT_SYMBOL(rdma_disconnect);
3959
c8f6a362
SH		 3960static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3961{
3962 struct rdma_id_private *id_priv;
3963 struct cma_multicast *mc = multicast->context;
7582df82 3964 struct rdma_cm_event event = {};
37e07cda 3965 int ret = 0;
c8f6a362
SH		 3966
3967 id_priv = mc->id_priv;
37e07cda
BVA		 3968 mutex_lock(&id_priv->handler_mutex);
3969 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3970 id_priv->state != RDMA_CM_ADDR_RESOLVED)
3971 goto out;
c8f6a362 3972
5c438135
SH		 3973 if (!status)
3974 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
498683c6
MS		 3975 else
3976 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
3977 status);
c5483388 3978 mutex_lock(&id_priv->qp_mutex);
498683c6 3979 if (!status && id_priv->id.qp) {
c8f6a362 3980 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
46ea5061 3981 be16_to_cpu(multicast->rec.mlid));
a3dd3a48 3982 if (status)
498683c6
MS		 3983 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
3984 status);
3985 }
c5483388 3986 mutex_unlock(&id_priv->qp_mutex);
c8f6a362 3987
c8f6a362
SH		 3988 event.status = status;
3989 event.param.ud.private_data = mc->context;
3990 if (!status) {
bee3c3c9
MS		 3991 struct rdma_dev_addr *dev_addr =
3992 &id_priv->id.route.addr.dev_addr;
3993 struct net_device *ndev =
052eac6e 3994 dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
bee3c3c9
MS		 3995 enum ib_gid_type gid_type =
3996 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3997 rdma_start_port(id_priv->cma_dev->device)];
3998
c8f6a362 3999 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
6d337179
PP		 4000 ret = ib_init_ah_from_mcmember(id_priv->id.device,
4001 id_priv->id.port_num,
4002 &multicast->rec,
4003 ndev, gid_type,
4004 &event.param.ud.ah_attr);
4005 if (ret)
4006 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4007
c8f6a362
SH		 4008 event.param.ud.qp_num = 0xFFFFFF;
4009 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
bee3c3c9
MS		 4010 if (ndev)
4011 dev_put(ndev);
c8f6a362
SH		 4012 } else
4013 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4014
4015 ret = id_priv->id.event_handler(&id_priv->id, &event);
f685c195
PP		 4016
4017 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
c8f6a362 4018 if (ret) {
550e5ca7 4019 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 4020 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 4021 rdma_destroy_id(&id_priv->id);
4022 return 0;
4023 }
8aa08602 4024
37e07cda 4025out:
de910bd9 4026 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 4027 return 0;
4028}
4029
4030static void cma_set_mgid(struct rdma_id_private *id_priv,
4031 struct sockaddr *addr, union ib_gid *mgid)
4032{
4033 unsigned char mc_map[MAX_ADDR_LEN];
4034 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4035 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4036 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4037
4038 if (cma_any_addr(addr)) {
4039 memset(mgid, 0, sizeof *mgid);
4040 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 4041 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 4042 0xFF10A01B)) {
4043 /* IPv6 address is an SA assigned MGID. */
4044 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
5bc2b7b3
SH		 4045 } else if (addr->sa_family == AF_IB) {
4046 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
076dd53b 4047 } else if (addr->sa_family == AF_INET6) {
e2e62697
JG		 4048 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4049 if (id_priv->id.ps == RDMA_PS_UDP)
4050 mc_map[7] = 0x01; /* Use RDMA CM signature */
4051 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 4052 } else {
a9e527e3 4053 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 4054 if (id_priv->id.ps == RDMA_PS_UDP)
4055 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 4056 *mgid = *(union ib_gid *) (mc_map + 4);
4057 }
4058}
4059
4060static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4061 struct cma_multicast *mc)
4062{
4063 struct ib_sa_mcmember_rec rec;
4064 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4065 ib_sa_comp_mask comp_mask;
4066 int ret;
4067
4068 ib_addr_get_mgid(dev_addr, &rec.mgid);
4069 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4070 &rec.mgid, &rec);
4071 if (ret)
4072 return ret;
4073
5bc2b7b3
SH		 4074 ret = cma_set_qkey(id_priv, 0);
4075 if (ret)
4076 return ret;
4077
3f446754 4078 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
5bc2b7b3 4079 rec.qkey = cpu_to_be32(id_priv->qkey);
6f8372b6 4080 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362 4081 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
ab15c95a
AV		 4082 rec.join_state = mc->join_state;
4083
ee1c60b1
DC		 4084 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
4085 (!ib_sa_sendonly_fullmem_support(&sa_client,
4086 id_priv->id.device,
4087 id_priv->id.port_num))) {
4088 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
4089 "RDMA CM: SM doesn't support Send Only Full Member option\n",
4090 id_priv->id.device->name, id_priv->id.port_num);
4091 return -EOPNOTSUPP;
ab15c95a 4092 }
c8f6a362
SH		 4093
4094 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4095 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4096 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4097 IB_SA_MCMEMBER_REC_FLOW_LABEL |
4098 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4099
84adeee9
YE		 4100 if (id_priv->id.ps == RDMA_PS_IPOIB)
4101 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2a22fb8c
DB		 4102 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4103 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4104 IB_SA_MCMEMBER_REC_MTU |
4105 IB_SA_MCMEMBER_REC_HOP_LIMIT;
84adeee9 4106
c8f6a362
SH		 4107 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4108 id_priv->id.port_num, &rec,
4109 comp_mask, GFP_KERNEL,
4110 cma_ib_mc_handler, mc);
8c6ffba0 4111 return PTR_ERR_OR_ZERO(mc->multicast.ib);
c8f6a362
SH		 4112}
4113
3c86aa70
EC		 4114static void iboe_mcast_work_handler(struct work_struct *work)
4115{
4116 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4117 struct cma_multicast *mc = mw->mc;
4118 struct ib_sa_multicast *m = mc->multicast.ib;
4119
4120 mc->multicast.ib->context = mc;
4121 cma_ib_mc_handler(0, m);
4122 kref_put(&mc->mcref, release_mc);
4123 kfree(mw);
4124}
4125
be1d325a
NO		 4126static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4127 enum ib_gid_type gid_type)
3c86aa70
EC		 4128{
4129 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4130 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4131
4132 if (cma_any_addr(addr)) {
4133 memset(mgid, 0, sizeof *mgid);
4134 } else if (addr->sa_family == AF_INET6) {
4135 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4136 } else {
5c181bda
PP		 4137 mgid->raw[0] =
4138 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4139 mgid->raw[1] =
4140 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
3c86aa70
EC		 4141 mgid->raw[2] = 0;
4142 mgid->raw[3] = 0;
4143 mgid->raw[4] = 0;
4144 mgid->raw[5] = 0;
4145 mgid->raw[6] = 0;
4146 mgid->raw[7] = 0;
4147 mgid->raw[8] = 0;
4148 mgid->raw[9] = 0;
4149 mgid->raw[10] = 0xff;
4150 mgid->raw[11] = 0xff;
4151 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4152 }
4153}
4154
4155static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4156 struct cma_multicast *mc)
4157{
4158 struct iboe_mcast_work *work;
4159 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
bee3c3c9 4160 int err = 0;
3c86aa70
EC		 4161 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4162 struct net_device *ndev = NULL;
bee3c3c9 4163 enum ib_gid_type gid_type;
ab15c95a
AV		 4164 bool send_only;
4165
4166 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
3c86aa70
EC		 4167
4168 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4169 return -EINVAL;
4170
4171 work = kzalloc(sizeof *work, GFP_KERNEL);
4172 if (!work)
4173 return -ENOMEM;
4174
4175 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4176 if (!mc->multicast.ib) {
4177 err = -ENOMEM;
4178 goto out1;
4179 }
4180
be1d325a
NO		 4181 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4182 rdma_start_port(id_priv->cma_dev->device)];
4183 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
3c86aa70
EC		 4184
4185 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4186 if (id_priv->id.ps == RDMA_PS_UDP)
4187 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4188
4189 if (dev_addr->bound_dev_if)
052eac6e 4190 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
3c86aa70
EC		 4191 if (!ndev) {
4192 err = -ENODEV;
4193 goto out2;
4194 }
4195 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4196 mc->multicast.ib->rec.hop_limit = 1;
4197 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
bee3c3c9 4198
bee3c3c9 4199 if (addr->sa_family == AF_INET) {
c65f6c5a
AV		 4200 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4201 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
ab15c95a
AV		 4202 if (!send_only) {
4203 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4204 true);
ab15c95a 4205 }
bee3c3c9
MS		 4206 }
4207 } else {
4208 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4209 err = -ENOTSUPP;
4210 }
3c86aa70 4211 dev_put(ndev);
bee3c3c9
MS		 4212 if (err || !mc->multicast.ib->rec.mtu) {
4213 if (!err)
4214 err = -EINVAL;
3c86aa70
EC		 4215 goto out2;
4216 }
7b85627b
MS		 4217 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4218 &mc->multicast.ib->rec.port_gid);
3c86aa70
EC		 4219 work->id = id_priv;
4220 work->mc = mc;
4221 INIT_WORK(&work->work, iboe_mcast_work_handler);
4222 kref_get(&mc->mcref);
4223 queue_work(cma_wq, &work->work);
4224
4225 return 0;
4226
4227out2:
4228 kfree(mc->multicast.ib);
4229out1:
4230 kfree(work);
4231 return err;
4232}
4233
c8f6a362 4234int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
ab15c95a 4235 u8 join_state, void *context)
c8f6a362
SH		 4236{
4237 struct rdma_id_private *id_priv;
4238 struct cma_multicast *mc;
4239 int ret;
4240
7688f2c3
LR		 4241 if (!id->device)
4242 return -EINVAL;
4243
c8f6a362 4244 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 4245 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4246 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 4247 return -EINVAL;
4248
4249 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4250 if (!mc)
4251 return -ENOMEM;
4252
ef560861 4253 memcpy(&mc->addr, addr, rdma_addr_size(addr));
c8f6a362
SH		 4254 mc->context = context;
4255 mc->id_priv = id_priv;
ab15c95a 4256 mc->join_state = join_state;
c8f6a362 4257
5d9fb044 4258 if (rdma_protocol_roce(id->device, id->port_num)) {
5c9a5282
MW		 4259 kref_init(&mc->mcref);
4260 ret = cma_iboe_join_multicast(id_priv, mc);
c0126915
JG		 4261 if (ret)
4262 goto out_err;
4263 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
5c9a5282 4264 ret = cma_join_ib_multicast(id_priv, mc);
c0126915
JG		 4265 if (ret)
4266 goto out_err;
4267 } else {
c8f6a362 4268 ret = -ENOSYS;
c0126915 4269 goto out_err;
c8f6a362 4270 }
c0126915
JG		 4271
4272 spin_lock(&id_priv->lock);
4273 list_add(&mc->list, &id_priv->mc_list);
4274 spin_unlock(&id_priv->lock);
4275
4276 return 0;
4277out_err:
4278 kfree(mc);
c8f6a362
SH		 4279 return ret;
4280}
4281EXPORT_SYMBOL(rdma_join_multicast);
4282
4283void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4284{
4285 struct rdma_id_private *id_priv;
4286 struct cma_multicast *mc;
4287
4288 id_priv = container_of(id, struct rdma_id_private, id);
4289 spin_lock_irq(&id_priv->lock);
4290 list_for_each_entry(mc, &id_priv->mc_list, list) {
ef560861 4291 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
c8f6a362
SH		 4292 list_del(&mc->list);
4293 spin_unlock_irq(&id_priv->lock);
4294
4295 if (id->qp)
4296 ib_detach_mcast(id->qp,
4297 &mc->multicast.ib->rec.mgid,
46ea5061 4298 be16_to_cpu(mc->multicast.ib->rec.mlid));
5c9a5282
MW		 4299
4300 BUG_ON(id_priv->cma_dev->device != id->device);
4301
a31ad3b0 4302 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
5c9a5282
MW		 4303 ib_sa_free_multicast(mc->multicast.ib);
4304 kfree(mc);
bee3c3c9 4305 } else if (rdma_protocol_roce(id->device, id->port_num)) {
88145678 4306 cma_leave_roce_mc_group(id_priv, mc);
bee3c3c9 4307 }
c8f6a362
SH		 4308 return;
4309 }
4310 }
4311 spin_unlock_irq(&id_priv->lock);
4312}
4313EXPORT_SYMBOL(rdma_leave_multicast);
4314
dd5bdff8
OG		 4315static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4316{
4317 struct rdma_dev_addr *dev_addr;
4318 struct cma_ndev_work *work;
4319
4320 dev_addr = &id_priv->id.route.addr.dev_addr;
4321
6266ed6e 4322 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
fa20105e 4323 (net_eq(dev_net(ndev), dev_addr->net)) &&
dd5bdff8 4324 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
aba25a3e
PP		 4325 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4326 ndev->name, &id_priv->id);
dd5bdff8
OG		 4327 work = kzalloc(sizeof *work, GFP_KERNEL);
4328 if (!work)
4329 return -ENOMEM;
4330
4331 INIT_WORK(&work->work, cma_ndev_work_handler);
4332 work->id = id_priv;
4333 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4334 atomic_inc(&id_priv->refcount);
4335 queue_work(cma_wq, &work->work);
4336 }
4337
4338 return 0;
4339}
4340
4341static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
351638e7 4342 void *ptr)
dd5bdff8 4343{
351638e7 4344 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
dd5bdff8
OG		 4345 struct cma_device *cma_dev;
4346 struct rdma_id_private *id_priv;
4347 int ret = NOTIFY_DONE;
4348
dd5bdff8
OG		 4349 if (event != NETDEV_BONDING_FAILOVER)
4350 return NOTIFY_DONE;
4351
3cd96fdd 4352 if (!netif_is_bond_master(ndev))
dd5bdff8
OG		 4353 return NOTIFY_DONE;
4354
4355 mutex_lock(&lock);
4356 list_for_each_entry(cma_dev, &dev_list, list)
4357 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4358 ret = cma_netdev_change(ndev, id_priv);
4359 if (ret)
4360 goto out;
4361 }
4362
4363out:
4364 mutex_unlock(&lock);
4365 return ret;
4366}
4367
4368static struct notifier_block cma_nb = {
4369 .notifier_call = cma_netdev_callback
4370};
4371
e51060f0
SH		 4372static void cma_add_one(struct ib_device *device)
4373{
4374 struct cma_device *cma_dev;
4375 struct rdma_id_private *id_priv;
045959db
MB		 4376 unsigned int i;
4377 unsigned long supported_gids = 0;
e51060f0
SH		 4378
4379 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4380 if (!cma_dev)
4381 return;
4382
4383 cma_dev->device = device;
045959db
MB		 4384 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4385 sizeof(*cma_dev->default_gid_type),
4386 GFP_KERNEL);
89052d78
MD		 4387 if (!cma_dev->default_gid_type)
4388 goto free_cma_dev;
4389
4390 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4391 sizeof(*cma_dev->default_roce_tos),
4392 GFP_KERNEL);
4393 if (!cma_dev->default_roce_tos)
4394 goto free_gid_type;
4395
045959db
MB		 4396 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4397 supported_gids = roce_gid_type_mask_support(device, i);
4398 WARN_ON(!supported_gids);
5ab2d89b 4399 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
63a5f483
MS		 4400 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4401 CMA_PREFERRED_ROCE_GID_TYPE;
4402 else
4403 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4404 find_first_bit(&supported_gids, BITS_PER_LONG);
89052d78 4405 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
045959db 4406 }
e51060f0
SH		 4407
4408 init_completion(&cma_dev->comp);
4409 atomic_set(&cma_dev->refcount, 1);
4410 INIT_LIST_HEAD(&cma_dev->id_list);
4411 ib_set_client_data(device, &cma_client, cma_dev);
4412
4413 mutex_lock(&lock);
4414 list_add_tail(&cma_dev->list, &dev_list);
4415 list_for_each_entry(id_priv, &listen_any_list, list)
4416 cma_listen_on_dev(id_priv, cma_dev);
4417 mutex_unlock(&lock);
89052d78
MD		 4418
4419 return;
4420
4421free_gid_type:
4422 kfree(cma_dev->default_gid_type);
4423
4424free_cma_dev:
4425 kfree(cma_dev);
4426
4427 return;
e51060f0
SH		 4428}
4429
4430static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4431{
7582df82 4432 struct rdma_cm_event event = {};
550e5ca7 4433 enum rdma_cm_state state;
de910bd9 4434 int ret = 0;
e51060f0
SH		 4435
4436 /* Record that we want to remove the device */
550e5ca7
NM		 4437 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4438 if (state == RDMA_CM_DESTROYING)
e51060f0
SH		 4439 return 0;
4440
4441 cma_cancel_operation(id_priv, state);
de910bd9 4442 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 4443
4444 /* Check for destruction from another callback. */
550e5ca7 4445 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
de910bd9 4446 goto out;
e51060f0 4447
a1b1b61f 4448 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 4449 ret = id_priv->id.event_handler(&id_priv->id, &event);
4450out:
4451 mutex_unlock(&id_priv->handler_mutex);
4452 return ret;
e51060f0
SH		 4453}
4454
4455static void cma_process_remove(struct cma_device *cma_dev)
4456{
e51060f0
SH		 4457 struct rdma_id_private *id_priv;
4458 int ret;
4459
e51060f0
SH		 4460 mutex_lock(&lock);
4461 while (!list_empty(&cma_dev->id_list)) {
4462 id_priv = list_entry(cma_dev->id_list.next,
4463 struct rdma_id_private, list);
4464
d02d1f53 4465 list_del(&id_priv->listen_list);
94de178a 4466 list_del_init(&id_priv->list);
e51060f0
SH		 4467 atomic_inc(&id_priv->refcount);
4468 mutex_unlock(&lock);
4469
d02d1f53 4470 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 4471 cma_deref_id(id_priv);
4472 if (ret)
4473 rdma_destroy_id(&id_priv->id);
4474
4475 mutex_lock(&lock);
4476 }
4477 mutex_unlock(&lock);
4478
4479 cma_deref_dev(cma_dev);
4480 wait_for_completion(&cma_dev->comp);
4481}
4482
7c1eb45a 4483static void cma_remove_one(struct ib_device *device, void *client_data)
e51060f0 4484{
7c1eb45a 4485 struct cma_device *cma_dev = client_data;
e51060f0 4486
e51060f0
SH		 4487 if (!cma_dev)
4488 return;
4489
4490 mutex_lock(&lock);
4491 list_del(&cma_dev->list);
4492 mutex_unlock(&lock);
4493
4494 cma_process_remove(cma_dev);
89052d78 4495 kfree(cma_dev->default_roce_tos);
045959db 4496 kfree(cma_dev->default_gid_type);
e51060f0
SH		 4497 kfree(cma_dev);
4498}
4499
753f618a
NM		 4500static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4501{
4502 struct nlmsghdr *nlh;
4503 struct rdma_cm_id_stats *id_stats;
4504 struct rdma_id_private *id_priv;
4505 struct rdma_cm_id *id = NULL;
4506 struct cma_device *cma_dev;
4507 int i_dev = 0, i_id = 0;
4508
4509 /*
4510 * We export all of the IDs as a sequence of messages. Each
4511 * ID gets its own netlink message.
4512 */
4513 mutex_lock(&lock);
4514
4515 list_for_each_entry(cma_dev, &dev_list, list) {
4516 if (i_dev < cb->args[0]) {
4517 i_dev++;
4518 continue;
4519 }
4520
4521 i_id = 0;
4522 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4523 if (i_id < cb->args[1]) {
4524 i_id++;
4525 continue;
4526 }
4527
4528 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4529 sizeof *id_stats, RDMA_NL_RDMA_CM,
30dc5e63
TN		 4530 RDMA_NL_RDMA_CM_ID_STATS,
4531 NLM_F_MULTI);
753f618a
NM		 4532 if (!id_stats)
4533 goto out;
4534
4535 memset(id_stats, 0, sizeof *id_stats);
4536 id = &id_priv->id;
4537 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4538 id_stats->port_num = id->port_num;
4539 id_stats->bound_dev_if =
4540 id->route.addr.dev_addr.bound_dev_if;
4541
ce117ffa
SH		 4542 if (ibnl_put_attr(skb, nlh,
4543 rdma_addr_size(cma_src_addr(id_priv)),
4544 cma_src_addr(id_priv),
4545 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4546 goto out;
4547 if (ibnl_put_attr(skb, nlh,
7baaa49a 4548 rdma_addr_size(cma_dst_addr(id_priv)),
ce117ffa
SH		 4549 cma_dst_addr(id_priv),
4550 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4551 goto out;
753f618a 4552
00313983 4553 id_stats->pid = task_pid_vnr(id_priv->res.task);
753f618a
NM		 4554 id_stats->port_space = id->ps;
4555 id_stats->cm_state = id_priv->state;
4556 id_stats->qp_num = id_priv->qp_num;
4557 id_stats->qp_type = id->qp_type;
4558
4559 i_id++;
e48e5e19 4560 nlmsg_end(skb, nlh);
753f618a
NM		 4561 }
4562
4563 cb->args[1] = 0;
4564 i_dev++;
4565 }
4566
4567out:
4568 mutex_unlock(&lock);
4569 cb->args[0] = i_dev;
4570 cb->args[1] = i_id;
4571
4572 return skb->len;
4573}
4574
d0e312fe 4575static const struct rdma_nl_cbs cma_cb_table[RDMA_NL_RDMA_CM_NUM_OPS] = {
64401b69 4576 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats},
753f618a
NM		 4577};
4578
4be74b42
HE		 4579static int cma_init_net(struct net *net)
4580{
4581 struct cma_pernet *pernet = cma_pernet(net);
4582
4583 idr_init(&pernet->tcp_ps);
4584 idr_init(&pernet->udp_ps);
4585 idr_init(&pernet->ipoib_ps);
4586 idr_init(&pernet->ib_ps);
4587
4588 return 0;
4589}
4590
4591static void cma_exit_net(struct net *net)
4592{
4593 struct cma_pernet *pernet = cma_pernet(net);
4594
4595 idr_destroy(&pernet->tcp_ps);
4596 idr_destroy(&pernet->udp_ps);
4597 idr_destroy(&pernet->ipoib_ps);
4598 idr_destroy(&pernet->ib_ps);
4599}
4600
4601static struct pernet_operations cma_pernet_operations = {
4602 .init = cma_init_net,
4603 .exit = cma_exit_net,
4604 .id = &cma_pernet_id,
4605 .size = sizeof(struct cma_pernet),
4606};
4607
716abb1f 4608static int __init cma_init(void)
e51060f0 4609{
5d7220e8 4610 int ret;
227b60f5 4611
dee9acbb 4612 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
e51060f0
SH		 4613 if (!cma_wq)
4614 return -ENOMEM;
4615
4be74b42
HE		 4616 ret = register_pernet_subsys(&cma_pernet_operations);
4617 if (ret)
4618 goto err_wq;
4619
c1a0b23b 4620 ib_sa_register_client(&sa_client);
dd5bdff8 4621 register_netdevice_notifier(&cma_nb);
c1a0b23b 4622
e51060f0
SH		 4623 ret = ib_register_client(&cma_client);
4624 if (ret)
4625 goto err;
753f618a 4626
c9901724 4627 rdma_nl_register(RDMA_NL_RDMA_CM, cma_cb_table);
045959db 4628 cma_configfs_init();
753f618a 4629
e51060f0
SH		 4630 return 0;
4631
4632err:
dd5bdff8 4633 unregister_netdevice_notifier(&cma_nb);
c1a0b23b 4634 ib_sa_unregister_client(&sa_client);
4be74b42 4635err_wq:
e51060f0
SH		 4636 destroy_workqueue(cma_wq);
4637 return ret;
4638}
4639
716abb1f 4640static void __exit cma_cleanup(void)
e51060f0 4641{
045959db 4642 cma_configfs_exit();
c9901724 4643 rdma_nl_unregister(RDMA_NL_RDMA_CM);
e51060f0 4644 ib_unregister_client(&cma_client);
dd5bdff8 4645 unregister_netdevice_notifier(&cma_nb);
c1a0b23b 4646 ib_sa_unregister_client(&sa_client);
4be74b42 4647 unregister_pernet_subsys(&cma_pernet_operations);
e51060f0 4648 destroy_workqueue(cma_wq);
e51060f0
SH		 4649}
4650
e3bf14bd
JG		 4651MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_RDMA_CM, 1);
4652
e51060f0
SH		 4653module_init(cma_init);
4654module_exit(cma_cleanup);
Linux 6.x block layer and io_uring tree(s)