]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blame - drivers/infiniband/core/cma.c
projects / mirror_ubuntu-eoan-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
RDMA/core: Return bool instead of int
[mirror_ubuntu-eoan-kernel.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 492 id_priv->cma_dev = cma_dev;
045959db 493 id_priv->gid_type = 0;
e51060f0 494 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 495 id_priv->id.route.addr.dev_addr.transport =
496 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0 497 list_add_tail(&id_priv->list, &cma_dev->id_list);
00313983 498 rdma_restrack_add(&id_priv->res);
e51060f0
SH		 499}
500
045959db
MB		 501static void cma_attach_to_dev(struct rdma_id_private *id_priv,
502 struct cma_device *cma_dev)
503{
504 _cma_attach_to_dev(id_priv, cma_dev);
505 id_priv->gid_type =
506 cma_dev->default_gid_type[id_priv->id.port_num -
507 rdma_start_port(cma_dev->device)];
508}
509
218a773f 510void cma_deref_dev(struct cma_device *cma_dev)
e51060f0
SH		 511{
512 if (atomic_dec_and_test(&cma_dev->refcount))
513 complete(&cma_dev->comp);
514}
515
3c86aa70
EC		 516static inline void release_mc(struct kref *kref)
517{
518 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
519
520 kfree(mc->multicast.ib);
521 kfree(mc);
522}
523
a396d43a 524static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 525{
a396d43a 526 mutex_lock(&lock);
e51060f0
SH		 527 list_del(&id_priv->list);
528 cma_deref_dev(id_priv->cma_dev);
529 id_priv->cma_dev = NULL;
a396d43a 530 mutex_unlock(&lock);
e51060f0
SH		 531}
532
f4753834
SH		 533static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
534{
535 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
536}
537
538static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
539{
540 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
541}
542
543static inline unsigned short cma_family(struct rdma_id_private *id_priv)
544{
545 return id_priv->id.route.addr.src_addr.ss_family;
546}
547
5c438135 548static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
c8f6a362
SH		 549{
550 struct ib_sa_mcmember_rec rec;
551 int ret = 0;
552
5c438135
SH		 553 if (id_priv->qkey) {
554 if (qkey && id_priv->qkey != qkey)
555 return -EINVAL;
d2ca39f2 556 return 0;
5c438135
SH		 557 }
558
559 if (qkey) {
560 id_priv->qkey = qkey;
561 return 0;
562 }
d2ca39f2
YE		 563
564 switch (id_priv->id.ps) {
c8f6a362 565 case RDMA_PS_UDP:
5c438135 566 case RDMA_PS_IB:
d2ca39f2 567 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 568 break;
569 case RDMA_PS_IPOIB:
d2ca39f2
YE		 570 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
571 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
572 id_priv->id.port_num, &rec.mgid,
573 &rec);
574 if (!ret)
575 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 576 break;
577 default:
578 break;
579 }
580 return ret;
581}
582
680f920a
SH		 583static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
584{
585 dev_addr->dev_type = ARPHRD_INFINIBAND;
586 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
587 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
588}
589
590static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
591{
592 int ret;
593
594 if (addr->sa_family != AF_IB) {
575c7e58 595 ret = rdma_translate_ip(addr, dev_addr);
680f920a
SH		 596 } else {
597 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
598 ret = 0;
599 }
600
601 return ret;
602}
603
4ed13a5f
PP		 604static const struct ib_gid_attr *
605cma_validate_port(struct ib_device *device, u8 port,
606 enum ib_gid_type gid_type,
607 union ib_gid *gid,
608 struct rdma_id_private *id_priv)
7c11147d 609{
2493a57b
PP		 610 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
611 int bound_if_index = dev_addr->bound_dev_if;
4ed13a5f 612 const struct ib_gid_attr *sgid_attr;
2493a57b 613 int dev_type = dev_addr->dev_type;
abae1b71 614 struct net_device *ndev = NULL;
7c11147d
MW		 615
616 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
4ed13a5f 617 return ERR_PTR(-ENODEV);
7c11147d
MW		 618
619 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
4ed13a5f 620 return ERR_PTR(-ENODEV);
7c11147d 621
00db63c1 622 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
66c74d74 623 ndev = dev_get_by_index(dev_addr->net, bound_if_index);
00db63c1 624 if (!ndev)
4ed13a5f 625 return ERR_PTR(-ENODEV);
00db63c1 626 } else {
045959db 627 gid_type = IB_GID_TYPE_IB;
00db63c1 628 }
abae1b71 629
4ed13a5f 630 sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
abae1b71
MB		 631 if (ndev)
632 dev_put(ndev);
4ed13a5f
PP		 633 return sgid_attr;
634}
7c11147d 635
4ed13a5f
PP		 636static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
637 const struct ib_gid_attr *sgid_attr)
638{
639 WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
640 id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
7c11147d
MW		 641}
642
be9130cc 643static int cma_acquire_dev(struct rdma_id_private *id_priv,
e7ff98ae 644 const struct rdma_id_private *listen_id_priv)
e51060f0 645{
c8f6a362 646 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4ed13a5f 647 const struct ib_gid_attr *sgid_attr;
e51060f0 648 struct cma_device *cma_dev;
7c11147d 649 union ib_gid gid, iboe_gid, *gidp;
4ed13a5f
PP		 650 enum ib_gid_type gid_type;
651 enum ib_gid_type default_type;
e51060f0 652 int ret = -ENODEV;
7c11147d 653 u8 port;
e51060f0 654
7c11147d 655 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
2efdd6a0
MS		 656 id_priv->id.ps == RDMA_PS_IPOIB)
657 return -EINVAL;
658
a396d43a 659 mutex_lock(&lock);
7b85627b
MS		 660 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
661 &iboe_gid);
662
3c86aa70
EC		 663 memcpy(&gid, dev_addr->src_dev_addr +
664 rdma_addr_gid_offset(dev_addr), sizeof gid);
7c11147d
MW		 665
666 if (listen_id_priv) {
be9130cc
DL		 667 cma_dev = listen_id_priv->cma_dev;
668 port = listen_id_priv->id.port_num;
5d9fb044 669 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d 670 &iboe_gid : &gid;
4ed13a5f
PP		 671 gid_type = rdma_protocol_ib(cma_dev->device, port) ?
672 IB_GID_TYPE_IB :
673 listen_id_priv->gid_type;
674 sgid_attr = cma_validate_port(cma_dev->device, port,
675 gid_type, gidp, id_priv);
676 if (!IS_ERR(sgid_attr)) {
7c11147d 677 id_priv->id.port_num = port;
4ed13a5f
PP		 678 cma_bind_sgid_attr(id_priv, sgid_attr);
679 ret = 0;
be9130cc
DL		 680 goto out;
681 }
682 }
7c11147d 683
e51060f0 684 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70 685 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
be9130cc
DL		 686 if (listen_id_priv &&
687 listen_id_priv->cma_dev == cma_dev &&
688 listen_id_priv->id.port_num == port)
689 continue;
7c11147d 690
5d9fb044 691 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d 692 &iboe_gid : &gid;
4ed13a5f
PP		 693 default_type = cma_dev->default_gid_type[port - 1];
694 gid_type =
695 rdma_protocol_ib(cma_dev->device, port) ?
696 IB_GID_TYPE_IB : default_type;
697 sgid_attr = cma_validate_port(cma_dev->device, port,
698 gid_type, gidp, id_priv);
699 if (!IS_ERR(sgid_attr)) {
7c11147d 700 id_priv->id.port_num = port;
4ed13a5f
PP		 701 cma_bind_sgid_attr(id_priv, sgid_attr);
702 ret = 0;
7c11147d 703 goto out;
3c86aa70 704 }
e51060f0
SH		 705 }
706 }
3c86aa70
EC		 707
708out:
709 if (!ret)
710 cma_attach_to_dev(id_priv, cma_dev);
711
a396d43a 712 mutex_unlock(&lock);
e51060f0
SH		 713 return ret;
714}
715
f17df3b0
SH		 716/*
717 * Select the source IB device and address to reach the destination IB address.
718 */
719static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
720{
721 struct cma_device *cma_dev, *cur_dev;
722 struct sockaddr_ib *addr;
723 union ib_gid gid, sgid, *dgid;
724 u16 pkey, index;
8fb488d7 725 u8 p;
93b1f29d 726 enum ib_port_state port_state;
f17df3b0
SH		 727 int i;
728
729 cma_dev = NULL;
730 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
731 dgid = (union ib_gid *) &addr->sib_addr;
732 pkey = ntohs(addr->sib_pkey);
733
734 list_for_each_entry(cur_dev, &dev_list, list) {
f17df3b0 735 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
30a74ef4 736 if (!rdma_cap_af_ib(cur_dev->device, p))
fef60902
MW		 737 continue;
738
f17df3b0
SH		 739 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
740 continue;
741
93b1f29d
JW		 742 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
743 continue;
1dfce294
PP		 744 for (i = 0; !rdma_query_gid(cur_dev->device,
745 p, i, &gid);
55ee3ab2 746 i++) {
f17df3b0
SH		 747 if (!memcmp(&gid, dgid, sizeof(gid))) {
748 cma_dev = cur_dev;
749 sgid = gid;
8fb488d7 750 id_priv->id.port_num = p;
f17df3b0
SH		 751 goto found;
752 }
753
754 if (!cma_dev && (gid.global.subnet_prefix ==
93b1f29d
JW		 755 dgid->global.subnet_prefix) &&
756 port_state == IB_PORT_ACTIVE) {
f17df3b0
SH		 757 cma_dev = cur_dev;
758 sgid = gid;
8fb488d7 759 id_priv->id.port_num = p;
f17df3b0
SH		 760 }
761 }
762 }
763 }
764
765 if (!cma_dev)
766 return -ENODEV;
767
768found:
769 cma_attach_to_dev(id_priv, cma_dev);
f17df3b0
SH		 770 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
771 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
772 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
773 return 0;
774}
775
e51060f0
SH		 776static void cma_deref_id(struct rdma_id_private *id_priv)
777{
778 if (atomic_dec_and_test(&id_priv->refcount))
779 complete(&id_priv->comp);
780}
781
00313983
SW		 782struct rdma_cm_id *__rdma_create_id(struct net *net,
783 rdma_cm_event_handler event_handler,
2253fc0c 784 void *context, enum rdma_ucm_port_space ps,
00313983 785 enum ib_qp_type qp_type, const char *caller)
e51060f0
SH		 786{
787 struct rdma_id_private *id_priv;
788
789 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
790 if (!id_priv)
791 return ERR_PTR(-ENOMEM);
792
00313983
SW		 793 if (caller)
794 id_priv->res.kern_name = caller;
795 else
796 rdma_restrack_set_task(&id_priv->res, current);
e11fef9f 797 id_priv->res.type = RDMA_RESTRACK_CM_ID;
550e5ca7 798 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 799 id_priv->id.context = context;
800 id_priv->id.event_handler = event_handler;
801 id_priv->id.ps = ps;
b26f9b99 802 id_priv->id.qp_type = qp_type;
89052d78 803 id_priv->tos_set = false;
e51060f0 804 spin_lock_init(&id_priv->lock);
c5483388 805 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 806 init_completion(&id_priv->comp);
807 atomic_set(&id_priv->refcount, 1);
de910bd9 808 mutex_init(&id_priv->handler_mutex);
e51060f0 809 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 810 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0 811 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
fa20105e 812 id_priv->id.route.addr.dev_addr.net = get_net(net);
23a9cd2a 813 id_priv->seq_num &= 0x00ffffff;
e51060f0
SH		 814
815 return &id_priv->id;
816}
00313983 817EXPORT_SYMBOL(__rdma_create_id);
e51060f0 818
c8f6a362 819static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 820{
821 struct ib_qp_attr qp_attr;
c8f6a362 822 int qp_attr_mask, ret;
e51060f0 823
c8f6a362
SH		 824 qp_attr.qp_state = IB_QPS_INIT;
825 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 826 if (ret)
827 return ret;
828
c8f6a362
SH		 829 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
830 if (ret)
831 return ret;
832
833 qp_attr.qp_state = IB_QPS_RTR;
834 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
835 if (ret)
836 return ret;
837
838 qp_attr.qp_state = IB_QPS_RTS;
839 qp_attr.sq_psn = 0;
840 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
841
842 return ret;
e51060f0
SH		 843}
844
c8f6a362 845static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 846{
847 struct ib_qp_attr qp_attr;
c8f6a362 848 int qp_attr_mask, ret;
07ebafba
TT		 849
850 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 851 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
852 if (ret)
853 return ret;
07ebafba 854
c8f6a362 855 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 856}
857
e51060f0
SH		 858int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
859 struct ib_qp_init_attr *qp_init_attr)
860{
861 struct rdma_id_private *id_priv;
862 struct ib_qp *qp;
863 int ret;
864
865 id_priv = container_of(id, struct rdma_id_private, id);
866 if (id->device != pd->device)
867 return -EINVAL;
868
0691a286 869 qp_init_attr->port_num = id->port_num;
e51060f0
SH		 870 qp = ib_create_qp(pd, qp_init_attr);
871 if (IS_ERR(qp))
872 return PTR_ERR(qp);
873
b26f9b99 874 if (id->qp_type == IB_QPT_UD)
c8f6a362
SH		 875 ret = cma_init_ud_qp(id_priv, qp);
876 else
877 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 878 if (ret)
879 goto err;
880
881 id->qp = qp;
882 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 883 id_priv->srq = (qp->srq != NULL);
884 return 0;
885err:
886 ib_destroy_qp(qp);
887 return ret;
888}
889EXPORT_SYMBOL(rdma_create_qp);
890
891void rdma_destroy_qp(struct rdma_cm_id *id)
892{
c5483388
SH		 893 struct rdma_id_private *id_priv;
894
895 id_priv = container_of(id, struct rdma_id_private, id);
896 mutex_lock(&id_priv->qp_mutex);
897 ib_destroy_qp(id_priv->id.qp);
898 id_priv->id.qp = NULL;
899 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 900}
901EXPORT_SYMBOL(rdma_destroy_qp);
902
5851bb89
SH		 903static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
904 struct rdma_conn_param *conn_param)
e51060f0
SH		 905{
906 struct ib_qp_attr qp_attr;
907 int qp_attr_mask, ret;
908
c5483388
SH		 909 mutex_lock(&id_priv->qp_mutex);
910 if (!id_priv->id.qp) {
911 ret = 0;
912 goto out;
913 }
e51060f0
SH		 914
915 /* Need to update QP attributes from default values. */
916 qp_attr.qp_state = IB_QPS_INIT;
c5483388 917 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 918 if (ret)
c5483388 919 goto out;
e51060f0 920
c5483388 921 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 922 if (ret)
c5483388 923 goto out;
e51060f0
SH		 924
925 qp_attr.qp_state = IB_QPS_RTR;
c5483388 926 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 927 if (ret)
c5483388 928 goto out;
e51060f0 929
fef60902
MW		 930 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
931
5851bb89
SH		 932 if (conn_param)
933 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 934 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
935out:
936 mutex_unlock(&id_priv->qp_mutex);
937 return ret;
e51060f0
SH		 938}
939
5851bb89
SH		 940static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
941 struct rdma_conn_param *conn_param)
e51060f0
SH		 942{
943 struct ib_qp_attr qp_attr;
944 int qp_attr_mask, ret;
945
c5483388
SH		 946 mutex_lock(&id_priv->qp_mutex);
947 if (!id_priv->id.qp) {
948 ret = 0;
949 goto out;
950 }
e51060f0
SH		 951
952 qp_attr.qp_state = IB_QPS_RTS;
c5483388 953 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 954 if (ret)
c5483388 955 goto out;
e51060f0 956
5851bb89
SH		 957 if (conn_param)
958 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 959 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
960out:
961 mutex_unlock(&id_priv->qp_mutex);
962 return ret;
e51060f0
SH		 963}
964
c5483388 965static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 966{
967 struct ib_qp_attr qp_attr;
c5483388 968 int ret;
e51060f0 969
c5483388
SH		 970 mutex_lock(&id_priv->qp_mutex);
971 if (!id_priv->id.qp) {
972 ret = 0;
973 goto out;
974 }
e51060f0
SH		 975
976 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 977 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
978out:
979 mutex_unlock(&id_priv->qp_mutex);
980 return ret;
e51060f0
SH		 981}
982
c8f6a362
SH		 983static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
984 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
985{
986 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
987 int ret;
3c86aa70
EC		 988 u16 pkey;
989
227128fc 990 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
3c86aa70 991 pkey = 0xffff;
fef60902
MW		 992 else
993 pkey = ib_addr_get_pkey(dev_addr);
c8f6a362
SH		 994
995 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 996 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 997 if (ret)
998 return ret;
999
1000 qp_attr->port_num = id_priv->id.port_num;
1001 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
1002
b26f9b99 1003 if (id_priv->id.qp_type == IB_QPT_UD) {
5c438135 1004 ret = cma_set_qkey(id_priv, 0);
d2ca39f2
YE		 1005 if (ret)
1006 return ret;
1007
c8f6a362
SH		 1008 qp_attr->qkey = id_priv->qkey;
1009 *qp_attr_mask |= IB_QP_QKEY;
1010 } else {
1011 qp_attr->qp_access_flags = 0;
1012 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1013 }
1014 return 0;
1015}
1016
e51060f0
SH		 1017int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1018 int *qp_attr_mask)
1019{
1020 struct rdma_id_private *id_priv;
c8f6a362 1021 int ret = 0;
e51060f0
SH		 1022
1023 id_priv = container_of(id, struct rdma_id_private, id);
72219cea 1024 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 1025 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 1026 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1027 else
1028 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1029 qp_attr_mask);
dd5f03be 1030
e51060f0
SH		 1031 if (qp_attr->qp_state == IB_QPS_RTR)
1032 qp_attr->rq_psn = id_priv->seq_num;
04215330 1033 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
c8f6a362 1034 if (!id_priv->cm_id.iw) {
8f076531 1035 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 1036 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1037 } else
1038 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1039 qp_attr_mask);
a62ab66b
IM		 1040 qp_attr->port_num = id_priv->id.port_num;
1041 *qp_attr_mask |= IB_QP_PORT;
21655afc 1042 } else
e51060f0 1043 ret = -ENOSYS;
e51060f0
SH		 1044
1045 return ret;
1046}
1047EXPORT_SYMBOL(rdma_init_qp_attr);
1048
ca3a8ace 1049static inline bool cma_zero_addr(const struct sockaddr *addr)
e51060f0 1050{
2e2d190c
SH		 1051 switch (addr->sa_family) {
1052 case AF_INET:
1053 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1054 case AF_INET6:
ca3a8ace 1055 return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
2e2d190c 1056 case AF_IB:
ca3a8ace 1057 return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
2e2d190c 1058 default:
ca3a8ace 1059 return false;
e51060f0
SH		 1060 }
1061}
1062
ca3a8ace 1063static inline bool cma_loopback_addr(const struct sockaddr *addr)
e51060f0 1064{
2e2d190c
SH		 1065 switch (addr->sa_family) {
1066 case AF_INET:
ca3a8ace
PP		 1067 return ipv4_is_loopback(
1068 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
2e2d190c 1069 case AF_INET6:
ca3a8ace
PP		 1070 return ipv6_addr_loopback(
1071 &((struct sockaddr_in6 *)addr)->sin6_addr);
2e2d190c 1072 case AF_IB:
ca3a8ace
PP		 1073 return ib_addr_loopback(
1074 &((struct sockaddr_ib *)addr)->sib_addr);
2e2d190c 1075 default:
ca3a8ace 1076 return false;
2e2d190c 1077 }
e51060f0
SH		 1078}
1079
ca3a8ace 1080static inline bool cma_any_addr(const struct sockaddr *addr)
e51060f0
SH		 1081{
1082 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1083}
1084
43b752da
HS		 1085static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1086{
1087 if (src->sa_family != dst->sa_family)
1088 return -1;
1089
1090 switch (src->sa_family) {
1091 case AF_INET:
1092 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1093 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2e2d190c 1094 case AF_INET6:
43b752da
HS		 1095 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1096 &((struct sockaddr_in6 *) dst)->sin6_addr);
2e2d190c
SH		 1097 default:
1098 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1099 &((struct sockaddr_ib *) dst)->sib_addr);
43b752da
HS		 1100 }
1101}
1102
2df7dba8 1103static __be16 cma_port(const struct sockaddr *addr)
628e5f6d 1104{
58afdcb7
SH		 1105 struct sockaddr_ib *sib;
1106
1107 switch (addr->sa_family) {
1108 case AF_INET:
628e5f6d 1109 return ((struct sockaddr_in *) addr)->sin_port;
58afdcb7 1110 case AF_INET6:
628e5f6d 1111 return ((struct sockaddr_in6 *) addr)->sin6_port;
58afdcb7
SH		 1112 case AF_IB:
1113 sib = (struct sockaddr_ib *) addr;
1114 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1115 be64_to_cpu(sib->sib_sid_mask)));
1116 default:
1117 return 0;
1118 }
628e5f6d
SH		 1119}
1120
2df7dba8 1121static inline int cma_any_port(const struct sockaddr *addr)
e51060f0 1122{
628e5f6d 1123 return !cma_port(addr);
e51060f0
SH		 1124}
1125
0c505f70
HE		 1126static void cma_save_ib_info(struct sockaddr *src_addr,
1127 struct sockaddr *dst_addr,
e7ff98ae
PP		 1128 const struct rdma_cm_id *listen_id,
1129 const struct sa_path_rec *path)
e51060f0 1130{
fbaa1a6d
SH		 1131 struct sockaddr_ib *listen_ib, *ib;
1132
1133 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
0c505f70
HE		 1134 if (src_addr) {
1135 ib = (struct sockaddr_ib *)src_addr;
1136 ib->sib_family = AF_IB;
1137 if (path) {
1138 ib->sib_pkey = path->pkey;
1139 ib->sib_flowinfo = path->flow_label;
1140 memcpy(&ib->sib_addr, &path->sgid, 16);
d3957b86 1141 ib->sib_sid = path->service_id;
0c505f70
HE		 1142 ib->sib_scope_id = 0;
1143 } else {
1144 ib->sib_pkey = listen_ib->sib_pkey;
1145 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1146 ib->sib_addr = listen_ib->sib_addr;
1147 ib->sib_sid = listen_ib->sib_sid;
1148 ib->sib_scope_id = listen_ib->sib_scope_id;
1149 }
1150 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
c07678bb 1151 }
0c505f70
HE		 1152 if (dst_addr) {
1153 ib = (struct sockaddr_ib *)dst_addr;
1154 ib->sib_family = AF_IB;
1155 if (path) {
1156 ib->sib_pkey = path->pkey;
1157 ib->sib_flowinfo = path->flow_label;
1158 memcpy(&ib->sib_addr, &path->dgid, 16);
1159 }
c07678bb 1160 }
fbaa1a6d 1161}
e51060f0 1162
c50e90d0
AB		 1163static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1164 struct sockaddr_in *dst_addr,
0c505f70
HE		 1165 struct cma_hdr *hdr,
1166 __be16 local_port)
fbaa1a6d 1167{
0c505f70 1168 if (src_addr) {
c50e90d0
AB		 1169 *src_addr = (struct sockaddr_in) {
1170 .sin_family = AF_INET,
1171 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1172 .sin_port = local_port,
1173 };
0c505f70 1174 }
fbaa1a6d 1175
0c505f70 1176 if (dst_addr) {
c50e90d0
AB		 1177 *dst_addr = (struct sockaddr_in) {
1178 .sin_family = AF_INET,
1179 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1180 .sin_port = hdr->port,
1181 };
0c505f70 1182 }
e51060f0
SH		 1183}
1184
c50e90d0
AB		 1185static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1186 struct sockaddr_in6 *dst_addr,
0c505f70
HE		 1187 struct cma_hdr *hdr,
1188 __be16 local_port)
e51060f0 1189{
0c505f70 1190 if (src_addr) {
c50e90d0
AB		 1191 *src_addr = (struct sockaddr_in6) {
1192 .sin6_family = AF_INET6,
1193 .sin6_addr = hdr->dst_addr.ip6,
1194 .sin6_port = local_port,
1195 };
0c505f70 1196 }
fbaa1a6d 1197
0c505f70 1198 if (dst_addr) {
c50e90d0
AB		 1199 *dst_addr = (struct sockaddr_in6) {
1200 .sin6_family = AF_INET6,
1201 .sin6_addr = hdr->src_addr.ip6,
1202 .sin6_port = hdr->port,
1203 };
0c505f70 1204 }
fbaa1a6d
SH		 1205}
1206
0c505f70 1207static u16 cma_port_from_service_id(__be64 service_id)
fbaa1a6d 1208{
0c505f70
HE		 1209 return (u16)be64_to_cpu(service_id);
1210}
fbaa1a6d 1211
0c505f70
HE		 1212static int cma_save_ip_info(struct sockaddr *src_addr,
1213 struct sockaddr *dst_addr,
e7ff98ae 1214 const struct ib_cm_event *ib_event,
0c505f70
HE		 1215 __be64 service_id)
1216{
1217 struct cma_hdr *hdr;
1218 __be16 port;
fbaa1a6d
SH		 1219
1220 hdr = ib_event->private_data;
1221 if (hdr->cma_version != CMA_VERSION)
1222 return -EINVAL;
1223
0c505f70
HE		 1224 port = htons(cma_port_from_service_id(service_id));
1225
fbaa1a6d 1226 switch (cma_get_ip_ver(hdr)) {
e51060f0 1227 case 4:
c50e90d0
AB		 1228 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1229 (struct sockaddr_in *)dst_addr, hdr, port);
e51060f0
SH		 1230 break;
1231 case 6:
c50e90d0
AB		 1232 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1233 (struct sockaddr_in6 *)dst_addr, hdr, port);
e51060f0
SH		 1234 break;
1235 default:
4c21b5bc 1236 return -EAFNOSUPPORT;
e51060f0 1237 }
0c505f70 1238
fbaa1a6d 1239 return 0;
e51060f0
SH		 1240}
1241
0c505f70
HE		 1242static int cma_save_net_info(struct sockaddr *src_addr,
1243 struct sockaddr *dst_addr,
e7ff98ae
PP		 1244 const struct rdma_cm_id *listen_id,
1245 const struct ib_cm_event *ib_event,
0c505f70
HE		 1246 sa_family_t sa_family, __be64 service_id)
1247{
1248 if (sa_family == AF_IB) {
1249 if (ib_event->event == IB_CM_REQ_RECEIVED)
1250 cma_save_ib_info(src_addr, dst_addr, listen_id,
1251 ib_event->param.req_rcvd.primary_path);
1252 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1253 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1254 return 0;
1255 }
1256
1257 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1258}
1259
4c21b5bc
HE		 1260static int cma_save_req_info(const struct ib_cm_event *ib_event,
1261 struct cma_req_info *req)
1262{
1263 const struct ib_cm_req_event_param *req_param =
1264 &ib_event->param.req_rcvd;
1265 const struct ib_cm_sidr_req_event_param *sidr_param =
1266 &ib_event->param.sidr_req_rcvd;
1267
1268 switch (ib_event->event) {
1269 case IB_CM_REQ_RECEIVED:
1270 req->device = req_param->listen_id->device;
1271 req->port = req_param->port;
1272 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1273 sizeof(req->local_gid));
1274 req->has_gid = true;
d3957b86 1275 req->service_id = req_param->primary_path->service_id;
ab3964ad 1276 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
84424a7f
HE		 1277 if (req->pkey != req_param->bth_pkey)
1278 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1279 "RDMA CMA: in the future this may cause the request to be dropped\n",
1280 req_param->bth_pkey, req->pkey);
4c21b5bc
HE		 1281 break;
1282 case IB_CM_SIDR_REQ_RECEIVED:
1283 req->device = sidr_param->listen_id->device;
1284 req->port = sidr_param->port;
1285 req->has_gid = false;
1286 req->service_id = sidr_param->service_id;
ab3964ad 1287 req->pkey = sidr_param->pkey;
84424a7f
HE		 1288 if (req->pkey != sidr_param->bth_pkey)
1289 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1290 "RDMA CMA: in the future this may cause the request to be dropped\n",
1291 sidr_param->bth_pkey, req->pkey);
4c21b5bc
HE		 1292 break;
1293 default:
1294 return -EINVAL;
1295 }
1296
1297 return 0;
1298}
1299
f887f2ac
HE		 1300static bool validate_ipv4_net_dev(struct net_device *net_dev,
1301 const struct sockaddr_in *dst_addr,
1302 const struct sockaddr_in *src_addr)
1303{
1304 __be32 daddr = dst_addr->sin_addr.s_addr,
1305 saddr = src_addr->sin_addr.s_addr;
1306 struct fib_result res;
1307 struct flowi4 fl4;
1308 int err;
1309 bool ret;
1310
1311 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1312 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1313 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1314 ipv4_is_loopback(saddr))
1315 return false;
1316
1317 memset(&fl4, 0, sizeof(fl4));
1318 fl4.flowi4_iif = net_dev->ifindex;
1319 fl4.daddr = daddr;
1320 fl4.saddr = saddr;
1321
1322 rcu_read_lock();
1323 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
d3632493 1324 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
f887f2ac
HE		 1325 rcu_read_unlock();
1326
1327 return ret;
1328}
1329
1330static bool validate_ipv6_net_dev(struct net_device *net_dev,
1331 const struct sockaddr_in6 *dst_addr,
1332 const struct sockaddr_in6 *src_addr)
1333{
1334#if IS_ENABLED(CONFIG_IPV6)
1335 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1336 IPV6_ADDR_LINKLOCAL;
1337 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1338 &src_addr->sin6_addr, net_dev->ifindex,
b75cc8f9 1339 NULL, strict);
f887f2ac
HE		 1340 bool ret;
1341
1342 if (!rt)
1343 return false;
1344
1345 ret = rt->rt6i_idev->dev == net_dev;
1346 ip6_rt_put(rt);
1347
1348 return ret;
1349#else
1350 return false;
1351#endif
1352}
1353
1354static bool validate_net_dev(struct net_device *net_dev,
1355 const struct sockaddr *daddr,
1356 const struct sockaddr *saddr)
1357{
1358 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1359 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1360 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1361 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1362
1363 switch (daddr->sa_family) {
1364 case AF_INET:
1365 return saddr->sa_family == AF_INET &&
1366 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1367
1368 case AF_INET6:
1369 return saddr->sa_family == AF_INET6 &&
1370 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1371
1372 default:
1373 return false;
1374 }
1375}
1376
cee10433
PP		 1377static struct net_device *
1378roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
1379{
1380 const struct ib_gid_attr *sgid_attr = NULL;
1381
1382 if (ib_event->event == IB_CM_REQ_RECEIVED)
1383 sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
1384 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1385 sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
1386
1387 if (!sgid_attr)
1388 return NULL;
1389 dev_hold(sgid_attr->ndev);
1390 return sgid_attr->ndev;
1391}
1392
e7ff98ae 1393static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
2918c1a9 1394 struct cma_req_info *req)
4c21b5bc 1395{
2918c1a9
PP		 1396 struct sockaddr *listen_addr =
1397 (struct sockaddr *)&req->listen_addr_storage;
1398 struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
4c21b5bc
HE		 1399 struct net_device *net_dev;
1400 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1401 int err;
1402
f887f2ac
HE		 1403 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1404 req->service_id);
4c21b5bc
HE		 1405 if (err)
1406 return ERR_PTR(err);
1407
cee10433
PP		 1408 if (rdma_protocol_roce(req->device, req->port))
1409 net_dev = roce_get_net_dev_by_cm_event(ib_event);
1410 else
1411 net_dev = ib_get_net_dev_by_params(req->device, req->port,
1412 req->pkey,
1413 gid, listen_addr);
4c21b5bc
HE		 1414 if (!net_dev)
1415 return ERR_PTR(-ENODEV);
1416
1417 return net_dev;
1418}
1419
2253fc0c 1420static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
4c21b5bc
HE		 1421{
1422 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1423}
1424
1425static bool cma_match_private_data(struct rdma_id_private *id_priv,
1426 const struct cma_hdr *hdr)
1427{
1428 struct sockaddr *addr = cma_src_addr(id_priv);
1429 __be32 ip4_addr;
1430 struct in6_addr ip6_addr;
1431
1432 if (cma_any_addr(addr) && !id_priv->afonly)
1433 return true;
1434
1435 switch (addr->sa_family) {
1436 case AF_INET:
1437 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1438 if (cma_get_ip_ver(hdr) != 4)
1439 return false;
1440 if (!cma_any_addr(addr) &&
1441 hdr->dst_addr.ip4.addr != ip4_addr)
1442 return false;
1443 break;
1444 case AF_INET6:
1445 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1446 if (cma_get_ip_ver(hdr) != 6)
1447 return false;
1448 if (!cma_any_addr(addr) &&
1449 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1450 return false;
1451 break;
1452 case AF_IB:
1453 return true;
1454 default:
1455 return false;
1456 }
1457
1458 return true;
1459}
1460
b8cab5da
HE		 1461static bool cma_protocol_roce(const struct rdma_cm_id *id)
1462{
1463 struct ib_device *device = id->device;
1464 const int port_num = id->port_num ?: rdma_start_port(device);
1465
5ac08a34 1466 return rdma_protocol_roce(device, port_num);
b8cab5da
HE		 1467}
1468
fac51590
MB		 1469static bool cma_match_net_dev(const struct rdma_cm_id *id,
1470 const struct net_device *net_dev,
1471 u8 port_num)
4c21b5bc 1472{
fac51590 1473 const struct rdma_addr *addr = &id->route.addr;
4c21b5bc
HE		 1474
1475 if (!net_dev)
d274e45c 1476 /* This request is an AF_IB request */
fac51590 1477 return (!id->port_num || id->port_num == port_num) &&
d274e45c 1478 (addr->src_addr.ss_family == AF_IB);
4c21b5bc 1479
643d213a
PP		 1480 /*
1481 * Net namespaces must match, and if the listner is listening
1482 * on a specific netdevice than netdevice must match as well.
1483 */
1484 if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1485 (!!addr->dev_addr.bound_dev_if ==
1486 (addr->dev_addr.bound_dev_if == net_dev->ifindex)))
1487 return true;
1488 else
1489 return false;
4c21b5bc
HE		 1490}
1491
1492static struct rdma_id_private *cma_find_listener(
1493 const struct rdma_bind_list *bind_list,
1494 const struct ib_cm_id *cm_id,
1495 const struct ib_cm_event *ib_event,
1496 const struct cma_req_info *req,
1497 const struct net_device *net_dev)
1498{
1499 struct rdma_id_private *id_priv, *id_priv_dev;
1500
1501 if (!bind_list)
1502 return ERR_PTR(-EINVAL);
1503
1504 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1505 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1506 if (id_priv->id.device == cm_id->device &&
fac51590 1507 cma_match_net_dev(&id_priv->id, net_dev, req->port))
4c21b5bc
HE		 1508 return id_priv;
1509 list_for_each_entry(id_priv_dev,
1510 &id_priv->listen_list,
1511 listen_list) {
1512 if (id_priv_dev->id.device == cm_id->device &&
fac51590 1513 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
4c21b5bc
HE		 1514 return id_priv_dev;
1515 }
1516 }
1517 }
1518
1519 return ERR_PTR(-EINVAL);
1520}
1521
e7ff98ae
PP		 1522static struct rdma_id_private *
1523cma_id_from_event(struct ib_cm_id *cm_id,
1524 const struct ib_cm_event *ib_event,
1525 struct net_device **net_dev)
4c21b5bc
HE		 1526{
1527 struct cma_req_info req;
1528 struct rdma_bind_list *bind_list;
1529 struct rdma_id_private *id_priv;
4c21b5bc
HE		 1530 int err;
1531
1532 err = cma_save_req_info(ib_event, &req);
1533 if (err)
1534 return ERR_PTR(err);
1535
0b3ca768
HE		 1536 *net_dev = cma_get_net_dev(ib_event, &req);
1537 if (IS_ERR(*net_dev)) {
1538 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
4c21b5bc 1539 /* Assuming the protocol is AF_IB */
0b3ca768 1540 *net_dev = NULL;
4c21b5bc 1541 } else {
0b3ca768 1542 return ERR_CAST(*net_dev);
4c21b5bc
HE		 1543 }
1544 }
1545
2918c1a9
PP		 1546 /*
1547 * Net namespace might be getting deleted while route lookup,
1548 * cm_id lookup is in progress. Therefore, perform netdevice
1549 * validation, cm_id lookup under rcu lock.
1550 * RCU lock along with netdevice state check, synchronizes with
1551 * netdevice migrating to different net namespace and also avoids
1552 * case where net namespace doesn't get deleted while lookup is in
1553 * progress.
1554 * If the device state is not IFF_UP, its properties such as ifindex
1555 * and nd_net cannot be trusted to remain valid without rcu lock.
1556 * net/core/dev.c change_net_namespace() ensures to synchronize with
1557 * ongoing operations on net device after device is closed using
1558 * synchronize_net().
1559 */
1560 rcu_read_lock();
1561 if (*net_dev) {
1562 /*
1563 * If netdevice is down, it is likely that it is administratively
1564 * down or it might be migrating to different namespace.
1565 * In that case avoid further processing, as the net namespace
1566 * or ifindex may change.
1567 */
1568 if (((*net_dev)->flags & IFF_UP) == 0) {
1569 id_priv = ERR_PTR(-EHOSTUNREACH);
1570 goto err;
1571 }
1572
1573 if (!validate_net_dev(*net_dev,
1574 (struct sockaddr *)&req.listen_addr_storage,
1575 (struct sockaddr *)&req.src_addr_storage)) {
1576 id_priv = ERR_PTR(-EHOSTUNREACH);
1577 goto err;
1578 }
1579 }
1580
fa20105e 1581 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
4be74b42 1582 rdma_ps_from_service_id(req.service_id),
4c21b5bc 1583 cma_port_from_service_id(req.service_id));
0b3ca768 1584 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
2918c1a9
PP		 1585err:
1586 rcu_read_unlock();
b3b51f9f 1587 if (IS_ERR(id_priv) && *net_dev) {
be688195
HE		 1588 dev_put(*net_dev);
1589 *net_dev = NULL;
1590 }
4c21b5bc
HE		 1591 return id_priv;
1592}
1593
c0b64f58 1594static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
e51060f0 1595{
e8160e15 1596 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
e51060f0
SH		 1597}
1598
e51060f0
SH		 1599static void cma_cancel_route(struct rdma_id_private *id_priv)
1600{
fe53ba2f 1601 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
e51060f0
SH		 1602 if (id_priv->query)
1603 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
e51060f0
SH		 1604 }
1605}
1606
e51060f0
SH		 1607static void cma_cancel_listens(struct rdma_id_private *id_priv)
1608{
1609 struct rdma_id_private *dev_id_priv;
1610
d02d1f53
SH		 1611 /*
1612 * Remove from listen_any_list to prevent added devices from spawning
1613 * additional listen requests.
1614 */
e51060f0
SH		 1615 mutex_lock(&lock);
1616 list_del(&id_priv->list);
1617
1618 while (!list_empty(&id_priv->listen_list)) {
1619 dev_id_priv = list_entry(id_priv->listen_list.next,
1620 struct rdma_id_private, listen_list);
d02d1f53
SH		 1621 /* sync with device removal to avoid duplicate destruction */
1622 list_del_init(&dev_id_priv->list);
1623 list_del(&dev_id_priv->listen_list);
1624 mutex_unlock(&lock);
1625
1626 rdma_destroy_id(&dev_id_priv->id);
1627 mutex_lock(&lock);
e51060f0
SH		 1628 }
1629 mutex_unlock(&lock);
1630}
1631
1632static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 1633 enum rdma_cm_state state)
e51060f0
SH		 1634{
1635 switch (state) {
550e5ca7 1636 case RDMA_CM_ADDR_QUERY:
e51060f0
SH		 1637 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1638 break;
550e5ca7 1639 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 1640 cma_cancel_route(id_priv);
1641 break;
550e5ca7 1642 case RDMA_CM_LISTEN:
f4753834 1643 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
e51060f0
SH		 1644 cma_cancel_listens(id_priv);
1645 break;
1646 default:
1647 break;
1648 }
1649}
1650
1651static void cma_release_port(struct rdma_id_private *id_priv)
1652{
1653 struct rdma_bind_list *bind_list = id_priv->bind_list;
fa20105e 1654 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0
SH		 1655
1656 if (!bind_list)
1657 return;
1658
1659 mutex_lock(&lock);
1660 hlist_del(&id_priv->node);
1661 if (hlist_empty(&bind_list->owners)) {
fa20105e 1662 cma_ps_remove(net, bind_list->ps, bind_list->port);
e51060f0
SH		 1663 kfree(bind_list);
1664 }
1665 mutex_unlock(&lock);
1666}
1667
88145678
PP		 1668static void cma_leave_roce_mc_group(struct rdma_id_private *id_priv,
1669 struct cma_multicast *mc)
1670{
c0126915
JG		 1671 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1672 struct net_device *ndev = NULL;
1673
1674 if (dev_addr->bound_dev_if)
1675 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
1676 if (ndev) {
1677 cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, false);
1678 dev_put(ndev);
88145678
PP		 1679 }
1680 kref_put(&mc->mcref, release_mc);
1681}
1682
c8f6a362
SH		 1683static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1684{
1685 struct cma_multicast *mc;
1686
1687 while (!list_empty(&id_priv->mc_list)) {
1688 mc = container_of(id_priv->mc_list.next,
1689 struct cma_multicast, list);
1690 list_del(&mc->list);
a31ad3b0 1691 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
5c9a5282 1692 id_priv->id.port_num)) {
3c86aa70
EC		 1693 ib_sa_free_multicast(mc->multicast.ib);
1694 kfree(mc);
bee3c3c9 1695 } else {
88145678 1696 cma_leave_roce_mc_group(id_priv, mc);
bee3c3c9 1697 }
c8f6a362
SH		 1698 }
1699}
1700
e51060f0
SH		 1701void rdma_destroy_id(struct rdma_cm_id *id)
1702{
1703 struct rdma_id_private *id_priv;
550e5ca7 1704 enum rdma_cm_state state;
e51060f0
SH		 1705
1706 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1707 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1708 cma_cancel_operation(id_priv, state);
1709
a396d43a
SH		 1710 /*
1711 * Wait for any active callback to finish. New callbacks will find
1712 * the id_priv state set to destroying and abort.
1713 */
1714 mutex_lock(&id_priv->handler_mutex);
1715 mutex_unlock(&id_priv->handler_mutex);
1716
e51060f0 1717 if (id_priv->cma_dev) {
00313983 1718 rdma_restrack_del(&id_priv->res);
72219cea 1719 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
0c9361fc 1720 if (id_priv->cm_id.ib)
e51060f0 1721 ib_destroy_cm_id(id_priv->cm_id.ib);
04215330 1722 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
0c9361fc 1723 if (id_priv->cm_id.iw)
07ebafba 1724 iw_destroy_cm_id(id_priv->cm_id.iw);
e51060f0 1725 }
c8f6a362 1726 cma_leave_mc_groups(id_priv);
a396d43a 1727 cma_release_dev(id_priv);
e51060f0
SH		 1728 }
1729
1730 cma_release_port(id_priv);
1731 cma_deref_id(id_priv);
1732 wait_for_completion(&id_priv->comp);
1733
d02d1f53
SH		 1734 if (id_priv->internal_id)
1735 cma_deref_id(id_priv->id.context);
1736
e51060f0 1737 kfree(id_priv->id.route.path_rec);
4ed13a5f
PP		 1738
1739 if (id_priv->id.route.addr.dev_addr.sgid_attr)
1740 rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
1741
fa20105e 1742 put_net(id_priv->id.route.addr.dev_addr.net);
e51060f0
SH		 1743 kfree(id_priv);
1744}
1745EXPORT_SYMBOL(rdma_destroy_id);
1746
1747static int cma_rep_recv(struct rdma_id_private *id_priv)
1748{
1749 int ret;
1750
5851bb89 1751 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 1752 if (ret)
1753 goto reject;
1754
5851bb89 1755 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 1756 if (ret)
1757 goto reject;
1758
1759 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1760 if (ret)
1761 goto reject;
1762
1763 return 0;
1764reject:
498683c6 1765 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
c5483388 1766 cma_modify_qp_err(id_priv);
e51060f0
SH		 1767 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1768 NULL, 0, NULL, 0);
1769 return ret;
1770}
1771
a1b1b61f 1772static void cma_set_rep_event_data(struct rdma_cm_event *event,
e7ff98ae 1773 const struct ib_cm_rep_event_param *rep_data,
a1b1b61f
SH		 1774 void *private_data)
1775{
1776 event->param.conn.private_data = private_data;
1777 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1778 event->param.conn.responder_resources = rep_data->responder_resources;
1779 event->param.conn.initiator_depth = rep_data->initiator_depth;
1780 event->param.conn.flow_control = rep_data->flow_control;
1781 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1782 event->param.conn.srq = rep_data->srq;
1783 event->param.conn.qp_num = rep_data->remote_qpn;
1784}
1785
e7ff98ae
PP		 1786static int cma_ib_handler(struct ib_cm_id *cm_id,
1787 const struct ib_cm_event *ib_event)
e51060f0
SH		 1788{
1789 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 1790 struct rdma_cm_event event;
1791 int ret = 0;
e51060f0 1792
37e07cda 1793 mutex_lock(&id_priv->handler_mutex);
38ca83a5 1794 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
37e07cda 1795 id_priv->state != RDMA_CM_CONNECT) ||
38ca83a5 1796 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
37e07cda
BVA		 1797 id_priv->state != RDMA_CM_DISCONNECT))
1798 goto out;
e51060f0 1799
a1b1b61f 1800 memset(&event, 0, sizeof event);
e51060f0
SH		 1801 switch (ib_event->event) {
1802 case IB_CM_REQ_ERROR:
1803 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1804 event.event = RDMA_CM_EVENT_UNREACHABLE;
1805 event.status = -ETIMEDOUT;
e51060f0
SH		 1806 break;
1807 case IB_CM_REP_RECEIVED:
61c0ddbe
MS		 1808 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1809 (id_priv->id.qp_type != IB_QPT_UD))
1810 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
01602f11 1811 if (id_priv->id.qp) {
a1b1b61f
SH		 1812 event.status = cma_rep_recv(id_priv);
1813 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1814 RDMA_CM_EVENT_ESTABLISHED;
01602f11 1815 } else {
a1b1b61f 1816 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
01602f11 1817 }
a1b1b61f
SH		 1818 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1819 ib_event->private_data);
e51060f0
SH		 1820 break;
1821 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1822 case IB_CM_USER_ESTABLISHED:
1823 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1824 break;
1825 case IB_CM_DREQ_ERROR:
a1b1b61f 1826 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1827 case IB_CM_DREQ_RECEIVED:
1828 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 1829 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1830 RDMA_CM_DISCONNECT))
e51060f0 1831 goto out;
a1b1b61f 1832 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1833 break;
1834 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1835 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1836 break;
e51060f0
SH		 1837 case IB_CM_MRA_RECEIVED:
1838 /* ignore event */
1839 goto out;
1840 case IB_CM_REJ_RECEIVED:
498683c6
MS		 1841 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1842 ib_event->param.rej_rcvd.reason));
c5483388 1843 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1844 event.status = ib_event->param.rej_rcvd.reason;
1845 event.event = RDMA_CM_EVENT_REJECTED;
1846 event.param.conn.private_data = ib_event->private_data;
1847 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1848 break;
1849 default:
aba25a3e 1850 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1851 ib_event->event);
1852 goto out;
1853 }
1854
a1b1b61f 1855 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1856 if (ret) {
1857 /* Destroy the CM ID by returning a non-zero value. */
1858 id_priv->cm_id.ib = NULL;
550e5ca7 1859 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1860 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1861 rdma_destroy_id(&id_priv->id);
1862 return ret;
1863 }
1864out:
de910bd9 1865 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1866 return ret;
1867}
1868
e7ff98ae
PP		 1869static struct rdma_id_private *
1870cma_new_conn_id(const struct rdma_cm_id *listen_id,
1871 const struct ib_cm_event *ib_event,
1872 struct net_device *net_dev)
e51060f0 1873{
00313983 1874 struct rdma_id_private *listen_id_priv;
e51060f0
SH		 1875 struct rdma_id_private *id_priv;
1876 struct rdma_cm_id *id;
1877 struct rdma_route *rt;
0c505f70 1878 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
9fdca4da 1879 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
d3957b86
MD		 1880 const __be64 service_id =
1881 ib_event->param.req_rcvd.primary_path->service_id;
64c5e613 1882 int ret;
e51060f0 1883
00313983
SW		 1884 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
1885 id = __rdma_create_id(listen_id->route.addr.dev_addr.net,
fa20105e 1886 listen_id->event_handler, listen_id->context,
00313983
SW		 1887 listen_id->ps, ib_event->param.req_rcvd.qp_type,
1888 listen_id_priv->res.kern_name);
e51060f0 1889 if (IS_ERR(id))
0c9361fc 1890 return NULL;
3f168d2b 1891
f4753834 1892 id_priv = container_of(id, struct rdma_id_private, id);
0c505f70
HE		 1893 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1894 (struct sockaddr *)&id->route.addr.dst_addr,
1895 listen_id, ib_event, ss_family, service_id))
fbaa1a6d 1896 goto err;
e51060f0
SH		 1897
1898 rt = &id->route;
1899 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
6da2ec56
KC		 1900 rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
1901 GFP_KERNEL);
e51060f0 1902 if (!rt->path_rec)
0c9361fc 1903 goto err;
e51060f0 1904
9fdca4da 1905 rt->path_rec[0] = *path;
e51060f0
SH		 1906 if (rt->num_paths == 2)
1907 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1908
0b3ca768 1909 if (net_dev) {
e08ce2e8 1910 rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
0b3ca768 1911 } else {
b8cab5da
HE		 1912 if (!cma_protocol_roce(listen_id) &&
1913 cma_any_addr(cma_src_addr(id_priv))) {
1914 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1915 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1916 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1917 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1918 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1919 if (ret)
1920 goto err;
1921 }
6f8372b6
SH		 1922 }
1923 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0 1924
550e5ca7 1925 id_priv->state = RDMA_CM_CONNECT;
e51060f0 1926 return id_priv;
3f168d2b 1927
3f168d2b 1928err:
0c9361fc 1929 rdma_destroy_id(id);
e51060f0
SH		 1930 return NULL;
1931}
1932
e7ff98ae
PP		 1933static struct rdma_id_private *
1934cma_new_udp_id(const struct rdma_cm_id *listen_id,
1935 const struct ib_cm_event *ib_event,
1936 struct net_device *net_dev)
628e5f6d 1937{
e7ff98ae 1938 const struct rdma_id_private *listen_id_priv;
628e5f6d
SH		 1939 struct rdma_id_private *id_priv;
1940 struct rdma_cm_id *id;
0c505f70 1941 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
fa20105e 1942 struct net *net = listen_id->route.addr.dev_addr.net;
628e5f6d
SH		 1943 int ret;
1944
00313983
SW		 1945 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
1946 id = __rdma_create_id(net, listen_id->event_handler, listen_id->context,
1947 listen_id->ps, IB_QPT_UD,
1948 listen_id_priv->res.kern_name);
628e5f6d
SH		 1949 if (IS_ERR(id))
1950 return NULL;
1951
f4753834 1952 id_priv = container_of(id, struct rdma_id_private, id);
0c505f70
HE		 1953 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1954 (struct sockaddr *)&id->route.addr.dst_addr,
1955 listen_id, ib_event, ss_family,
1956 ib_event->param.sidr_req_rcvd.service_id))
628e5f6d
SH		 1957 goto err;
1958
0b3ca768 1959 if (net_dev) {
e08ce2e8 1960 rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
0b3ca768 1961 } else {
b8cab5da
HE		 1962 if (!cma_any_addr(cma_src_addr(id_priv))) {
1963 ret = cma_translate_addr(cma_src_addr(id_priv),
1964 &id->route.addr.dev_addr);
1965 if (ret)
1966 goto err;
1967 }
6f8372b6 1968 }
628e5f6d 1969
550e5ca7 1970 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 1971 return id_priv;
1972err:
1973 rdma_destroy_id(id);
1974 return NULL;
1975}
1976
a1b1b61f 1977static void cma_set_req_event_data(struct rdma_cm_event *event,
e7ff98ae 1978 const struct ib_cm_req_event_param *req_data,
a1b1b61f
SH		 1979 void *private_data, int offset)
1980{
1981 event->param.conn.private_data = private_data + offset;
1982 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1983 event->param.conn.responder_resources = req_data->responder_resources;
1984 event->param.conn.initiator_depth = req_data->initiator_depth;
1985 event->param.conn.flow_control = req_data->flow_control;
1986 event->param.conn.retry_count = req_data->retry_count;
1987 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1988 event->param.conn.srq = req_data->srq;
1989 event->param.conn.qp_num = req_data->remote_qpn;
1990}
1991
e7ff98ae
PP		 1992static int cma_check_req_qp_type(const struct rdma_cm_id *id,
1993 const struct ib_cm_event *ib_event)
9595480c 1994{
4dd81e89 1995 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 1996 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1997 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1998 (id->qp_type == IB_QPT_UD)) ||
1999 (!id->qp_type));
2000}
2001
e7ff98ae
PP		 2002static int cma_req_handler(struct ib_cm_id *cm_id,
2003 const struct ib_cm_event *ib_event)
e51060f0 2004{
37e07cda 2005 struct rdma_id_private *listen_id, *conn_id = NULL;
a1b1b61f 2006 struct rdma_cm_event event;
0b3ca768 2007 struct net_device *net_dev;
c0b64f58
BVA		 2008 u8 offset;
2009 int ret;
e51060f0 2010
0b3ca768 2011 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
4c21b5bc
HE		 2012 if (IS_ERR(listen_id))
2013 return PTR_ERR(listen_id);
2014
0b3ca768
HE		 2015 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
2016 ret = -EINVAL;
2017 goto net_dev_put;
2018 }
9595480c 2019
37e07cda
BVA		 2020 mutex_lock(&listen_id->handler_mutex);
2021 if (listen_id->state != RDMA_CM_LISTEN) {
0b3ca768 2022 ret = -ECONNABORTED;
37e07cda 2023 goto err1;
0b3ca768 2024 }
e51060f0 2025
628e5f6d 2026 memset(&event, 0, sizeof event);
e8160e15 2027 offset = cma_user_data_offset(listen_id);
628e5f6d 2028 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 2029 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
0b3ca768 2030 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 2031 event.param.ud.private_data = ib_event->private_data + offset;
2032 event.param.ud.private_data_len =
2033 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
2034 } else {
0b3ca768 2035 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 2036 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
2037 ib_event->private_data, offset);
2038 }
e51060f0
SH		 2039 if (!conn_id) {
2040 ret = -ENOMEM;
b6cec8aa 2041 goto err1;
e51060f0
SH		 2042 }
2043
de910bd9 2044 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
be9130cc 2045 ret = cma_acquire_dev(conn_id, listen_id);
a1a733f6 2046 if (ret)
b6cec8aa 2047 goto err2;
e51060f0
SH		 2048
2049 conn_id->cm_id.ib = cm_id;
2050 cm_id->context = conn_id;
2051 cm_id->cm_handler = cma_ib_handler;
2052
25ae21a1
SH		 2053 /*
2054 * Protect against the user destroying conn_id from another thread
2055 * until we're done accessing it.
2056 */
2057 atomic_inc(&conn_id->refcount);
a1b1b61f 2058 ret = conn_id->id.event_handler(&conn_id->id, &event);
b6cec8aa
SH		 2059 if (ret)
2060 goto err3;
b6cec8aa
SH		 2061 /*
2062 * Acquire mutex to prevent user executing rdma_destroy_id()
2063 * while we're accessing the cm_id.
2064 */
2065 mutex_lock(&lock);
dd5f03be
MB		 2066 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2067 (conn_id->id.qp_type != IB_QPT_UD))
b6cec8aa
SH		 2068 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2069 mutex_unlock(&lock);
2070 mutex_unlock(&conn_id->handler_mutex);
2071 mutex_unlock(&listen_id->handler_mutex);
25ae21a1 2072 cma_deref_id(conn_id);
0b3ca768
HE		 2073 if (net_dev)
2074 dev_put(net_dev);
b6cec8aa 2075 return 0;
a1a733f6 2076
b6cec8aa
SH		 2077err3:
2078 cma_deref_id(conn_id);
a1a733f6
KK		 2079 /* Destroy the CM ID by returning a non-zero value. */
2080 conn_id->cm_id.ib = NULL;
b6cec8aa 2081err2:
550e5ca7 2082 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 2083 mutex_unlock(&conn_id->handler_mutex);
b6cec8aa 2084err1:
de910bd9 2085 mutex_unlock(&listen_id->handler_mutex);
b6cec8aa
SH		 2086 if (conn_id)
2087 rdma_destroy_id(&conn_id->id);
0b3ca768
HE		 2088
2089net_dev_put:
2090 if (net_dev)
2091 dev_put(net_dev);
2092
e51060f0
SH		 2093 return ret;
2094}
2095
cf53936f 2096__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
e51060f0 2097{
496ce3ce
SH		 2098 if (addr->sa_family == AF_IB)
2099 return ((struct sockaddr_ib *) addr)->sib_sid;
2100
cf53936f 2101 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0 2102}
cf53936f 2103EXPORT_SYMBOL(rdma_get_service_id);
e51060f0 2104
411460ac
PP		 2105void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
2106 union ib_gid *dgid)
2107{
2108 struct rdma_addr *addr = &cm_id->route.addr;
2109
2110 if (!cm_id->device) {
2111 if (sgid)
2112 memset(sgid, 0, sizeof(*sgid));
2113 if (dgid)
2114 memset(dgid, 0, sizeof(*dgid));
2115 return;
2116 }
2117
2118 if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
2119 if (sgid)
2120 rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
2121 if (dgid)
2122 rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
2123 } else {
2124 if (sgid)
2125 rdma_addr_get_sgid(&addr->dev_addr, sgid);
2126 if (dgid)
2127 rdma_addr_get_dgid(&addr->dev_addr, dgid);
2128 }
2129}
2130EXPORT_SYMBOL(rdma_read_gids);
2131
07ebafba
TT		 2132static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2133{
2134 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 2135 struct rdma_cm_event event;
07ebafba 2136 int ret = 0;
24d44a39
SW		 2137 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2138 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba 2139
37e07cda
BVA		 2140 mutex_lock(&id_priv->handler_mutex);
2141 if (id_priv->state != RDMA_CM_CONNECT)
2142 goto out;
07ebafba 2143
be65f086 2144 memset(&event, 0, sizeof event);
07ebafba
TT		 2145 switch (iw_event->event) {
2146 case IW_CM_EVENT_CLOSE:
a1b1b61f 2147 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 2148 break;
2149 case IW_CM_EVENT_CONNECT_REPLY:
24d44a39
SW		 2150 memcpy(cma_src_addr(id_priv), laddr,
2151 rdma_addr_size(laddr));
2152 memcpy(cma_dst_addr(id_priv), raddr,
2153 rdma_addr_size(raddr));
881a045f
SW		 2154 switch (iw_event->status) {
2155 case 0:
a1b1b61f 2156 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 2157 event.param.conn.initiator_depth = iw_event->ird;
2158 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 2159 break;
2160 case -ECONNRESET:
2161 case -ECONNREFUSED:
2162 event.event = RDMA_CM_EVENT_REJECTED;
2163 break;
2164 case -ETIMEDOUT:
2165 event.event = RDMA_CM_EVENT_UNREACHABLE;
2166 break;
2167 default:
2168 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2169 break;
2170 }
07ebafba
TT		 2171 break;
2172 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 2173 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 2174 event.param.conn.initiator_depth = iw_event->ird;
2175 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 2176 break;
2177 default:
671a6cc2 2178 goto out;
07ebafba
TT		 2179 }
2180
a1b1b61f
SH		 2181 event.status = iw_event->status;
2182 event.param.conn.private_data = iw_event->private_data;
2183 event.param.conn.private_data_len = iw_event->private_data_len;
2184 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 2185 if (ret) {
2186 /* Destroy the CM ID by returning a non-zero value. */
2187 id_priv->cm_id.iw = NULL;
550e5ca7 2188 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2189 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 2190 rdma_destroy_id(&id_priv->id);
2191 return ret;
2192 }
2193
37e07cda 2194out:
de910bd9 2195 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 2196 return ret;
2197}
2198
2199static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2200 struct iw_cm_event *iw_event)
2201{
2202 struct rdma_cm_id *new_cm_id;
2203 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 2204 struct rdma_cm_event event;
37e07cda 2205 int ret = -ECONNABORTED;
24d44a39
SW		 2206 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2207 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba
TT		 2208
2209 listen_id = cm_id->context;
37e07cda
BVA		 2210
2211 mutex_lock(&listen_id->handler_mutex);
2212 if (listen_id->state != RDMA_CM_LISTEN)
2213 goto out;
07ebafba
TT		 2214
2215 /* Create a new RDMA id for the new IW CM ID */
00313983
SW		 2216 new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2217 listen_id->id.event_handler,
2218 listen_id->id.context,
2219 RDMA_PS_TCP, IB_QPT_RC,
2220 listen_id->res.kern_name);
10f32065 2221 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 2222 ret = -ENOMEM;
2223 goto out;
2224 }
2225 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 2226 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 2227 conn_id->state = RDMA_CM_CONNECT;
07ebafba 2228
575c7e58 2229 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
07ebafba 2230 if (ret) {
de910bd9 2231 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 2232 rdma_destroy_id(new_cm_id);
2233 goto out;
2234 }
2235
be9130cc 2236 ret = cma_acquire_dev(conn_id, listen_id);
07ebafba 2237 if (ret) {
de910bd9 2238 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 2239 rdma_destroy_id(new_cm_id);
2240 goto out;
2241 }
2242
2243 conn_id->cm_id.iw = cm_id;
2244 cm_id->context = conn_id;
2245 cm_id->cm_handler = cma_iw_handler;
2246
24d44a39
SW		 2247 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2248 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
07ebafba 2249
a1b1b61f
SH		 2250 memset(&event, 0, sizeof event);
2251 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2252 event.param.conn.private_data = iw_event->private_data;
2253 event.param.conn.private_data_len = iw_event->private_data_len;
3ebeebc3
KS		 2254 event.param.conn.initiator_depth = iw_event->ird;
2255 event.param.conn.responder_resources = iw_event->ord;
25ae21a1
SH		 2256
2257 /*
2258 * Protect against the user destroying conn_id from another thread
2259 * until we're done accessing it.
2260 */
2261 atomic_inc(&conn_id->refcount);
a1b1b61f 2262 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 2263 if (ret) {
2264 /* User wants to destroy the CM ID */
2265 conn_id->cm_id.iw = NULL;
550e5ca7 2266 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 2267 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 2268 cma_deref_id(conn_id);
07ebafba 2269 rdma_destroy_id(&conn_id->id);
de910bd9 2270 goto out;
07ebafba
TT		 2271 }
2272
de910bd9 2273 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 2274 cma_deref_id(conn_id);
de910bd9 2275
07ebafba 2276out:
de910bd9 2277 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 2278 return ret;
2279}
2280
e51060f0
SH		 2281static int cma_ib_listen(struct rdma_id_private *id_priv)
2282{
e51060f0 2283 struct sockaddr *addr;
0c9361fc 2284 struct ib_cm_id *id;
e51060f0 2285 __be64 svc_id;
e51060f0 2286
51efe394
HE		 2287 addr = cma_src_addr(id_priv);
2288 svc_id = rdma_get_service_id(&id_priv->id, addr);
2289 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
0c9361fc
JM		 2290 if (IS_ERR(id))
2291 return PTR_ERR(id);
0c9361fc 2292 id_priv->cm_id.ib = id;
e51060f0 2293
51efe394 2294 return 0;
e51060f0
SH		 2295}
2296
07ebafba
TT		 2297static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2298{
2299 int ret;
0c9361fc
JM		 2300 struct iw_cm_id *id;
2301
2302 id = iw_create_cm_id(id_priv->id.device,
2303 iw_conn_req_handler,
2304 id_priv);
2305 if (IS_ERR(id))
2306 return PTR_ERR(id);
07ebafba 2307
68cdba06 2308 id->tos = id_priv->tos;
0c9361fc 2309 id_priv->cm_id.iw = id;
07ebafba 2310
24d44a39
SW		 2311 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2312 rdma_addr_size(cma_src_addr(id_priv)));
07ebafba
TT		 2313
2314 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2315
2316 if (ret) {
2317 iw_destroy_cm_id(id_priv->cm_id.iw);
2318 id_priv->cm_id.iw = NULL;
2319 }
2320
2321 return ret;
2322}
2323
e51060f0
SH		 2324static int cma_listen_handler(struct rdma_cm_id *id,
2325 struct rdma_cm_event *event)
2326{
2327 struct rdma_id_private *id_priv = id->context;
2328
2329 id->context = id_priv->id.context;
2330 id->event_handler = id_priv->id.event_handler;
2331 return id_priv->id.event_handler(id, event);
2332}
2333
2334static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2335 struct cma_device *cma_dev)
2336{
2337 struct rdma_id_private *dev_id_priv;
2338 struct rdma_cm_id *id;
fa20105e 2339 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0
SH		 2340 int ret;
2341
72219cea 2342 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
94d0c939
SH		 2343 return;
2344
00313983
SW		 2345 id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2346 id_priv->id.qp_type, id_priv->res.kern_name);
e51060f0
SH		 2347 if (IS_ERR(id))
2348 return;
2349
2350 dev_id_priv = container_of(id, struct rdma_id_private, id);
2351
550e5ca7 2352 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
f4753834
SH		 2353 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2354 rdma_addr_size(cma_src_addr(id_priv)));
e51060f0 2355
045959db 2356 _cma_attach_to_dev(dev_id_priv, cma_dev);
e51060f0 2357 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 2358 atomic_inc(&id_priv->refcount);
2359 dev_id_priv->internal_id = 1;
5b0ec991 2360 dev_id_priv->afonly = id_priv->afonly;
e51060f0
SH		 2361
2362 ret = rdma_listen(id, id_priv->backlog);
2363 if (ret)
aba25a3e
PP		 2364 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2365 ret, cma_dev->device->name);
e51060f0
SH		 2366}
2367
2368static void cma_listen_on_all(struct rdma_id_private *id_priv)
2369{
2370 struct cma_device *cma_dev;
2371
2372 mutex_lock(&lock);
2373 list_add_tail(&id_priv->list, &listen_any_list);
2374 list_for_each_entry(cma_dev, &dev_list, list)
2375 cma_listen_on_dev(id_priv, cma_dev);
2376 mutex_unlock(&lock);
2377}
2378
a81c994d
SH		 2379void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2380{
2381 struct rdma_id_private *id_priv;
2382
2383 id_priv = container_of(id, struct rdma_id_private, id);
2384 id_priv->tos = (u8) tos;
89052d78 2385 id_priv->tos_set = true;
a81c994d
SH		 2386}
2387EXPORT_SYMBOL(rdma_set_service_type);
2388
c2f8fc4e 2389static void cma_query_handler(int status, struct sa_path_rec *path_rec,
e51060f0
SH		 2390 void *context)
2391{
2392 struct cma_work *work = context;
2393 struct rdma_route *route;
2394
2395 route = &work->id->id.route;
2396
2397 if (!status) {
2398 route->num_paths = 1;
2399 *route->path_rec = *path_rec;
2400 } else {
550e5ca7
NM		 2401 work->old_state = RDMA_CM_ROUTE_QUERY;
2402 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0 2403 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 2404 work->event.status = status;
498683c6
MS		 2405 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2406 status);
e51060f0
SH		 2407 }
2408
2409 queue_work(cma_wq, &work->work);
2410}
2411
2412static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2413 struct cma_work *work)
2414{
f4753834 2415 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
c2f8fc4e 2416 struct sa_path_rec path_rec;
a81c994d
SH		 2417 ib_sa_comp_mask comp_mask;
2418 struct sockaddr_in6 *sin6;
f68194ca 2419 struct sockaddr_ib *sib;
e51060f0
SH		 2420
2421 memset(&path_rec, 0, sizeof path_rec);
4c33bd19
DC		 2422
2423 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2424 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2425 else
2426 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
f4753834
SH		 2427 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2428 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2429 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
e51060f0 2430 path_rec.numb_path = 1;
962063e6 2431 path_rec.reversible = 1;
d3957b86
MD		 2432 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2433 cma_dst_addr(id_priv));
a81c994d
SH		 2434
2435 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2436 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2437 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2438
f68194ca
SH		 2439 switch (cma_family(id_priv)) {
2440 case AF_INET:
a81c994d
SH		 2441 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2442 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
f68194ca
SH		 2443 break;
2444 case AF_INET6:
f4753834 2445 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
a81c994d
SH		 2446 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2447 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
f68194ca
SH		 2448 break;
2449 case AF_IB:
2450 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2451 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2452 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2453 break;
a81c994d 2454 }
e51060f0 2455
c1a0b23b 2456 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 2457 id_priv->id.port_num, &path_rec,
2458 comp_mask, timeout_ms,
2459 GFP_KERNEL, cma_query_handler,
2460 work, &id_priv->query);
e51060f0
SH		 2461
2462 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2463}
2464
c4028958 2465static void cma_work_handler(struct work_struct *_work)
e51060f0 2466{
c4028958 2467 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 2468 struct rdma_id_private *id_priv = work->id;
2469 int destroy = 0;
2470
de910bd9 2471 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 2472 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2473 goto out;
2474
2475 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 2476 cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 2477 destroy = 1;
2478 }
2479out:
de910bd9 2480 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2481 cma_deref_id(id_priv);
2482 if (destroy)
2483 rdma_destroy_id(&id_priv->id);
2484 kfree(work);
2485}
2486
dd5bdff8
OG		 2487static void cma_ndev_work_handler(struct work_struct *_work)
2488{
2489 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2490 struct rdma_id_private *id_priv = work->id;
2491 int destroy = 0;
2492
2493 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2494 if (id_priv->state == RDMA_CM_DESTROYING ||
2495 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
dd5bdff8
OG		 2496 goto out;
2497
2498 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 2499 cma_exch(id_priv, RDMA_CM_DESTROYING);
dd5bdff8
OG		 2500 destroy = 1;
2501 }
2502
2503out:
2504 mutex_unlock(&id_priv->handler_mutex);
2505 cma_deref_id(id_priv);
2506 if (destroy)
2507 rdma_destroy_id(&id_priv->id);
2508 kfree(work);
2509}
2510
981b5a23
PP		 2511static void cma_init_resolve_route_work(struct cma_work *work,
2512 struct rdma_id_private *id_priv)
2513{
2514 work->id = id_priv;
2515 INIT_WORK(&work->work, cma_work_handler);
2516 work->old_state = RDMA_CM_ROUTE_QUERY;
2517 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2518 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2519}
2520
2521static void cma_init_resolve_addr_work(struct cma_work *work,
2522 struct rdma_id_private *id_priv)
2523{
2524 work->id = id_priv;
2525 INIT_WORK(&work->work, cma_work_handler);
2526 work->old_state = RDMA_CM_ADDR_QUERY;
2527 work->new_state = RDMA_CM_ADDR_RESOLVED;
2528 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2529}
2530
e51060f0
SH		 2531static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2532{
2533 struct rdma_route *route = &id_priv->id.route;
2534 struct cma_work *work;
2535 int ret;
2536
2537 work = kzalloc(sizeof *work, GFP_KERNEL);
2538 if (!work)
2539 return -ENOMEM;
2540
981b5a23 2541 cma_init_resolve_route_work(work, id_priv);
e51060f0
SH		 2542
2543 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2544 if (!route->path_rec) {
2545 ret = -ENOMEM;
2546 goto err1;
2547 }
2548
2549 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2550 if (ret)
2551 goto err2;
2552
2553 return 0;
2554err2:
2555 kfree(route->path_rec);
2556 route->path_rec = NULL;
2557err1:
2558 kfree(work);
2559 return ret;
2560}
2561
9327c7af
PP		 2562static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2563 unsigned long supported_gids,
2564 enum ib_gid_type default_gid)
2565{
2566 if ((network_type == RDMA_NETWORK_IPV4 ||
2567 network_type == RDMA_NETWORK_IPV6) &&
2568 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2569 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2570
2571 return default_gid;
2572}
2573
2574/*
2575 * cma_iboe_set_path_rec_l2_fields() is helper function which sets
2576 * path record type based on GID type.
2577 * It also sets up other L2 fields which includes destination mac address
2578 * netdev ifindex, of the path record.
2579 * It returns the netdev of the bound interface for this path record entry.
2580 */
2581static struct net_device *
2582cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
2583{
2584 struct rdma_route *route = &id_priv->id.route;
2585 enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
2586 struct rdma_addr *addr = &route->addr;
2587 unsigned long supported_gids;
2588 struct net_device *ndev;
2589
2590 if (!addr->dev_addr.bound_dev_if)
2591 return NULL;
2592
2593 ndev = dev_get_by_index(addr->dev_addr.net,
2594 addr->dev_addr.bound_dev_if);
2595 if (!ndev)
2596 return NULL;
2597
2598 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2599 id_priv->id.port_num);
2600 gid_type = cma_route_gid_type(addr->dev_addr.network,
2601 supported_gids,
2602 id_priv->gid_type);
2603 /* Use the hint from IP Stack to select GID Type */
2604 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2605 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2606 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2607
114cc9c4 2608 route->path_rec->roce.route_resolved = true;
9327c7af
PP		 2609 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2610 return ndev;
2611}
2612
fe75889f
PP		 2613int rdma_set_ib_path(struct rdma_cm_id *id,
2614 struct sa_path_rec *path_rec)
e51060f0
SH		 2615{
2616 struct rdma_id_private *id_priv;
8d20a1f0 2617 struct net_device *ndev;
e51060f0
SH		 2618 int ret;
2619
2620 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 2621 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2622 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 2623 return -EINVAL;
2624
fe75889f 2625 id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
9893e742 2626 GFP_KERNEL);
e51060f0
SH		 2627 if (!id->route.path_rec) {
2628 ret = -ENOMEM;
2629 goto err;
2630 }
2631
8d20a1f0
PP		 2632 if (rdma_protocol_roce(id->device, id->port_num)) {
2633 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2634 if (!ndev) {
2635 ret = -ENODEV;
2636 goto err_free;
2637 }
2638 dev_put(ndev);
2639 }
2640
fe75889f 2641 id->route.num_paths = 1;
e51060f0 2642 return 0;
8d20a1f0
PP		 2643
2644err_free:
2645 kfree(id->route.path_rec);
2646 id->route.path_rec = NULL;
e51060f0 2647err:
550e5ca7 2648 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2649 return ret;
2650}
fe75889f 2651EXPORT_SYMBOL(rdma_set_ib_path);
e51060f0 2652
07ebafba
TT		 2653static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2654{
2655 struct cma_work *work;
2656
2657 work = kzalloc(sizeof *work, GFP_KERNEL);
2658 if (!work)
2659 return -ENOMEM;
2660
981b5a23 2661 cma_init_resolve_route_work(work, id_priv);
07ebafba
TT		 2662 queue_work(cma_wq, &work->work);
2663 return 0;
2664}
2665
eb072c4b
EP		 2666static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2667{
2668 int prio;
2669 struct net_device *dev;
2670
2671 prio = rt_tos2priority(tos);
d0d7b10b 2672 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
eb072c4b
EP		 2673 if (dev->num_tc)
2674 return netdev_get_prio_tc_map(dev, prio);
2675
2676#if IS_ENABLED(CONFIG_VLAN_8021Q)
d0d7b10b 2677 if (is_vlan_dev(ndev))
eb072c4b
EP		 2678 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2679 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2680#endif
2681 return 0;
2682}
2683
3c86aa70
EC		 2684static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2685{
2686 struct rdma_route *route = &id_priv->id.route;
2687 struct rdma_addr *addr = &route->addr;
2688 struct cma_work *work;
2689 int ret;
4367ec7f 2690 struct net_device *ndev;
4367ec7f 2691
89052d78
MD		 2692 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2693 rdma_start_port(id_priv->cma_dev->device)];
2694 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
dd5f03be 2695
3c86aa70 2696
3c86aa70
EC		 2697 work = kzalloc(sizeof *work, GFP_KERNEL);
2698 if (!work)
2699 return -ENOMEM;
2700
3c86aa70
EC		 2701 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2702 if (!route->path_rec) {
2703 ret = -ENOMEM;
2704 goto err1;
2705 }
2706
2707 route->num_paths = 1;
2708
9327c7af 2709 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
3c86aa70
EC		 2710 if (!ndev) {
2711 ret = -ENODEV;
2712 goto err2;
2713 }
2714
7b85627b
MS		 2715 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2716 &route->path_rec->sgid);
2717 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2718 &route->path_rec->dgid);
af7bd463 2719
c3efe750 2720 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
c865f246 2721 /* TODO: get the hoplimit from the inet/inet6 device */
c3efe750
MB		 2722 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2723 else
c865f246 2724 route->path_rec->hop_limit = 1;
af7bd463
EC		 2725 route->path_rec->reversible = 1;
2726 route->path_rec->pkey = cpu_to_be16(0xffff);
2727 route->path_rec->mtu_selector = IB_SA_EQ;
89052d78
MD		 2728 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2729 route->path_rec->traffic_class = tos;
3c86aa70
EC		 2730 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2731 route->path_rec->rate_selector = IB_SA_EQ;
2732 route->path_rec->rate = iboe_get_rate(ndev);
2733 dev_put(ndev);
2734 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2735 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2736 if (!route->path_rec->mtu) {
2737 ret = -EINVAL;
2738 goto err2;
2739 }
2740
981b5a23 2741 cma_init_resolve_route_work(work, id_priv);
3c86aa70
EC		 2742 queue_work(cma_wq, &work->work);
2743
2744 return 0;
2745
2746err2:
2747 kfree(route->path_rec);
2748 route->path_rec = NULL;
2749err1:
2750 kfree(work);
2751 return ret;
2752}
2753
e51060f0
SH		 2754int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2755{
2756 struct rdma_id_private *id_priv;
2757 int ret;
2758
2759 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2760 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 2761 return -EINVAL;
2762
2763 atomic_inc(&id_priv->refcount);
fe53ba2f 2764 if (rdma_cap_ib_sa(id->device, id->port_num))
c72f2189 2765 ret = cma_resolve_ib_route(id_priv, timeout_ms);
5d9fb044 2766 else if (rdma_protocol_roce(id->device, id->port_num))
c72f2189
MW		 2767 ret = cma_resolve_iboe_route(id_priv);
2768 else if (rdma_protocol_iwarp(id->device, id->port_num))
07ebafba 2769 ret = cma_resolve_iw_route(id_priv, timeout_ms);
c72f2189 2770 else
e51060f0 2771 ret = -ENOSYS;
c72f2189 2772
e51060f0
SH		 2773 if (ret)
2774 goto err;
2775
2776 return 0;
2777err:
550e5ca7 2778 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2779 cma_deref_id(id_priv);
2780 return ret;
2781}
2782EXPORT_SYMBOL(rdma_resolve_route);
2783
6a3e362d
SH		 2784static void cma_set_loopback(struct sockaddr *addr)
2785{
2786 switch (addr->sa_family) {
2787 case AF_INET:
2788 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2789 break;
2790 case AF_INET6:
2791 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2792 0, 0, 0, htonl(1));
2793 break;
2794 default:
2795 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2796 0, 0, 0, htonl(1));
2797 break;
2798 }
2799}
2800
e51060f0
SH		 2801static int cma_bind_loopback(struct rdma_id_private *id_priv)
2802{
b0569e40 2803 struct cma_device *cma_dev, *cur_dev;
f0ee3404 2804 union ib_gid gid;
102c5ce0 2805 enum ib_port_state port_state;
e51060f0
SH		 2806 u16 pkey;
2807 int ret;
2808 u8 p;
2809
b0569e40 2810 cma_dev = NULL;
e51060f0 2811 mutex_lock(&lock);
b0569e40
SH		 2812 list_for_each_entry(cur_dev, &dev_list, list) {
2813 if (cma_family(id_priv) == AF_IB &&
72219cea 2814 !rdma_cap_ib_cm(cur_dev->device, 1))
b0569e40
SH		 2815 continue;
2816
2817 if (!cma_dev)
2818 cma_dev = cur_dev;
2819
2820 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
102c5ce0
JW		 2821 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2822 port_state == IB_PORT_ACTIVE) {
b0569e40
SH		 2823 cma_dev = cur_dev;
2824 goto port_found;
2825 }
2826 }
2827 }
2828
2829 if (!cma_dev) {
e82153b5
KK		 2830 ret = -ENODEV;
2831 goto out;
2832 }
e51060f0 2833
e82153b5 2834 p = 1;
e51060f0
SH		 2835
2836port_found:
1dfce294 2837 ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 2838 if (ret)
2839 goto out;
2840
2841 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2842 if (ret)
2843 goto out;
2844
6f8372b6 2845 id_priv->id.route.addr.dev_addr.dev_type =
21655afc 2846 (rdma_protocol_ib(cma_dev->device, p)) ?
6f8372b6
SH		 2847 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2848
2849 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 2850 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2851 id_priv->id.port_num = p;
2852 cma_attach_to_dev(id_priv, cma_dev);
f4753834 2853 cma_set_loopback(cma_src_addr(id_priv));
e51060f0
SH		 2854out:
2855 mutex_unlock(&lock);
2856 return ret;
2857}
2858
2859static void addr_handler(int status, struct sockaddr *src_addr,
2860 struct rdma_dev_addr *dev_addr, void *context)
2861{
2862 struct rdma_id_private *id_priv = context;
a1b1b61f 2863 struct rdma_cm_event event;
e51060f0 2864
a1b1b61f 2865 memset(&event, 0, sizeof event);
de910bd9 2866 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2867 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2868 RDMA_CM_ADDR_RESOLVED))
61a73c70 2869 goto out;
61a73c70 2870
7b85627b 2871 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
498683c6 2872 if (!status && !id_priv->cma_dev) {
be9130cc 2873 status = cma_acquire_dev(id_priv, NULL);
498683c6
MS		 2874 if (status)
2875 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
2876 status);
2877 } else {
2878 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
2879 }
e51060f0
SH		 2880
2881 if (status) {
550e5ca7
NM		 2882 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2883 RDMA_CM_ADDR_BOUND))
e51060f0 2884 goto out;
a1b1b61f
SH		 2885 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2886 event.status = status;
7b85627b 2887 } else
a1b1b61f 2888 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0 2889
a1b1b61f 2890 if (id_priv->id.event_handler(&id_priv->id, &event)) {
550e5ca7 2891 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2892 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2893 cma_deref_id(id_priv);
2894 rdma_destroy_id(&id_priv->id);
2895 return;
2896 }
2897out:
de910bd9 2898 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2899 cma_deref_id(id_priv);
2900}
2901
2902static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2903{
2904 struct cma_work *work;
f0ee3404 2905 union ib_gid gid;
e51060f0
SH		 2906 int ret;
2907
2908 work = kzalloc(sizeof *work, GFP_KERNEL);
2909 if (!work)
2910 return -ENOMEM;
2911
2912 if (!id_priv->cma_dev) {
2913 ret = cma_bind_loopback(id_priv);
2914 if (ret)
2915 goto err;
2916 }
2917
6f8372b6
SH		 2918 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2919 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2920
981b5a23 2921 cma_init_resolve_addr_work(work, id_priv);
e51060f0
SH		 2922 queue_work(cma_wq, &work->work);
2923 return 0;
2924err:
2925 kfree(work);
2926 return ret;
2927}
2928
f17df3b0
SH		 2929static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2930{
2931 struct cma_work *work;
2932 int ret;
2933
2934 work = kzalloc(sizeof *work, GFP_KERNEL);
2935 if (!work)
2936 return -ENOMEM;
2937
2938 if (!id_priv->cma_dev) {
2939 ret = cma_resolve_ib_dev(id_priv);
2940 if (ret)
2941 goto err;
2942 }
2943
2944 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2945 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2946
981b5a23 2947 cma_init_resolve_addr_work(work, id_priv);
f17df3b0
SH		 2948 queue_work(cma_wq, &work->work);
2949 return 0;
2950err:
2951 kfree(work);
2952 return ret;
2953}
2954
e51060f0 2955static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2df7dba8 2956 const struct sockaddr *dst_addr)
e51060f0 2957{
d14714df
SH		 2958 if (!src_addr || !src_addr->sa_family) {
2959 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
f17df3b0 2960 src_addr->sa_family = dst_addr->sa_family;
b4cfe397
JM		 2961 if (IS_ENABLED(CONFIG_IPV6) &&
2962 dst_addr->sa_family == AF_INET6) {
6c26a771
SB		 2963 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2964 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2965 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2966 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2967 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
f17df3b0
SH		 2968 } else if (dst_addr->sa_family == AF_IB) {
2969 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2970 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
d14714df
SH		 2971 }
2972 }
2973 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2974}
2975
2976int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2df7dba8 2977 const struct sockaddr *dst_addr, int timeout_ms)
e51060f0
SH		 2978{
2979 struct rdma_id_private *id_priv;
2980 int ret;
2981
2982 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2983 if (id_priv->state == RDMA_CM_IDLE) {
e51060f0 2984 ret = cma_bind_addr(id, src_addr, dst_addr);
219d2e9d 2985 if (ret)
e51060f0
SH		 2986 return ret;
2987 }
2988
219d2e9d 2989 if (cma_family(id_priv) != dst_addr->sa_family)
4ae7152e
SH		 2990 return -EINVAL;
2991
219d2e9d 2992 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
e51060f0
SH		 2993 return -EINVAL;
2994
219d2e9d 2995 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
e51060f0 2996 atomic_inc(&id_priv->refcount);
f17df3b0 2997 if (cma_any_addr(dst_addr)) {
e51060f0 2998 ret = cma_resolve_loopback(id_priv);
f17df3b0
SH		 2999 } else {
3000 if (dst_addr->sa_family == AF_IB) {
3001 ret = cma_resolve_ib_addr(id_priv);
3002 } else {
ee6548d1 3003 ret = rdma_resolve_ip(cma_src_addr(id_priv),
f17df3b0
SH		 3004 dst_addr, &id->route.addr.dev_addr,
3005 timeout_ms, addr_handler, id_priv);
3006 }
3007 }
e51060f0
SH		 3008 if (ret)
3009 goto err;
3010
3011 return 0;
3012err:
550e5ca7 3013 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 3014 cma_deref_id(id_priv);
3015 return ret;
3016}
3017EXPORT_SYMBOL(rdma_resolve_addr);
3018
a9bb7912
HS		 3019int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
3020{
3021 struct rdma_id_private *id_priv;
3022 unsigned long flags;
3023 int ret;
3024
3025 id_priv = container_of(id, struct rdma_id_private, id);
3026 spin_lock_irqsave(&id_priv->lock, flags);
c8dea2f9 3027 if (reuse || id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 3028 id_priv->reuseaddr = reuse;
3029 ret = 0;
3030 } else {
3031 ret = -EINVAL;
3032 }
3033 spin_unlock_irqrestore(&id_priv->lock, flags);
3034 return ret;
3035}
3036EXPORT_SYMBOL(rdma_set_reuseaddr);
3037
68602120
SH		 3038int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3039{
3040 struct rdma_id_private *id_priv;
3041 unsigned long flags;
3042 int ret;
3043
3044 id_priv = container_of(id, struct rdma_id_private, id);
3045 spin_lock_irqsave(&id_priv->lock, flags);
3046 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3047 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3048 id_priv->afonly = afonly;
3049 ret = 0;
3050 } else {
3051 ret = -EINVAL;
3052 }
3053 spin_unlock_irqrestore(&id_priv->lock, flags);
3054 return ret;
3055}
3056EXPORT_SYMBOL(rdma_set_afonly);
3057
e51060f0
SH		 3058static void cma_bind_port(struct rdma_bind_list *bind_list,
3059 struct rdma_id_private *id_priv)
3060{
58afdcb7
SH		 3061 struct sockaddr *addr;
3062 struct sockaddr_ib *sib;
3063 u64 sid, mask;
3064 __be16 port;
e51060f0 3065
f4753834 3066 addr = cma_src_addr(id_priv);
58afdcb7
SH		 3067 port = htons(bind_list->port);
3068
3069 switch (addr->sa_family) {
3070 case AF_INET:
3071 ((struct sockaddr_in *) addr)->sin_port = port;
3072 break;
3073 case AF_INET6:
3074 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3075 break;
3076 case AF_IB:
3077 sib = (struct sockaddr_ib *) addr;
3078 sid = be64_to_cpu(sib->sib_sid);
3079 mask = be64_to_cpu(sib->sib_sid_mask);
3080 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3081 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3082 break;
3083 }
e51060f0
SH		 3084 id_priv->bind_list = bind_list;
3085 hlist_add_head(&id_priv->node, &bind_list->owners);
3086}
3087
2253fc0c 3088static int cma_alloc_port(enum rdma_ucm_port_space ps,
aac978e1 3089 struct rdma_id_private *id_priv, unsigned short snum)
e51060f0
SH		 3090{
3091 struct rdma_bind_list *bind_list;
3b069c5d 3092 int ret;
e51060f0 3093
cb164b8c 3094 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 3095 if (!bind_list)
3096 return -ENOMEM;
3097
fa20105e
GS		 3098 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3099 snum);
3b069c5d
TH		 3100 if (ret < 0)
3101 goto err;
aedec080
SH		 3102
3103 bind_list->ps = ps;
3b069c5d 3104 bind_list->port = (unsigned short)ret;
aedec080
SH		 3105 cma_bind_port(bind_list, id_priv);
3106 return 0;
3b069c5d 3107err:
aedec080 3108 kfree(bind_list);
3b069c5d 3109 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
aedec080 3110}
e51060f0 3111
19b752a1
MS		 3112static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3113 struct rdma_id_private *id_priv)
3114{
3115 struct rdma_id_private *cur_id;
3116 struct sockaddr *daddr = cma_dst_addr(id_priv);
3117 struct sockaddr *saddr = cma_src_addr(id_priv);
3118 __be16 dport = cma_port(daddr);
3119
3120 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3121 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3122 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3123 __be16 cur_dport = cma_port(cur_daddr);
3124
3125 if (id_priv == cur_id)
3126 continue;
3127
3128 /* different dest port -> unique */
9dea9a2f
TN		 3129 if (!cma_any_port(daddr) &&
3130 !cma_any_port(cur_daddr) &&
19b752a1
MS		 3131 (dport != cur_dport))
3132 continue;
3133
3134 /* different src address -> unique */
3135 if (!cma_any_addr(saddr) &&
3136 !cma_any_addr(cur_saddr) &&
3137 cma_addr_cmp(saddr, cur_saddr))
3138 continue;
3139
3140 /* different dst address -> unique */
9dea9a2f
TN		 3141 if (!cma_any_addr(daddr) &&
3142 !cma_any_addr(cur_daddr) &&
19b752a1
MS		 3143 cma_addr_cmp(daddr, cur_daddr))
3144 continue;
3145
3146 return -EADDRNOTAVAIL;
3147 }
3148 return 0;
3149}
3150
2253fc0c 3151static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
aac978e1 3152 struct rdma_id_private *id_priv)
aedec080 3153{
5d7220e8
TH		 3154 static unsigned int last_used_port;
3155 int low, high, remaining;
3156 unsigned int rover;
fa20105e 3157 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0 3158
fa20105e 3159 inet_get_local_port_range(net, &low, &high);
5d7220e8 3160 remaining = (high - low) + 1;
63862b5b 3161 rover = prandom_u32() % remaining + low;
5d7220e8 3162retry:
19b752a1
MS		 3163 if (last_used_port != rover) {
3164 struct rdma_bind_list *bind_list;
3165 int ret;
3166
3167 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3168
3169 if (!bind_list) {
3170 ret = cma_alloc_port(ps, id_priv, rover);
3171 } else {
3172 ret = cma_port_is_unique(bind_list, id_priv);
3173 if (!ret)
3174 cma_bind_port(bind_list, id_priv);
3175 }
5d7220e8
TH		 3176 /*
3177 * Remember previously used port number in order to avoid
3178 * re-using same port immediately after it is closed.
3179 */
3180 if (!ret)
3181 last_used_port = rover;
3182 if (ret != -EADDRNOTAVAIL)
3183 return ret;
e51060f0 3184 }
5d7220e8
TH		 3185 if (--remaining) {
3186 rover++;
3187 if ((rover < low) || (rover > high))
3188 rover = low;
3189 goto retry;
3190 }
3191 return -EADDRNOTAVAIL;
e51060f0
SH		 3192}
3193
a9bb7912
HS		 3194/*
3195 * Check that the requested port is available. This is called when trying to
3196 * bind to a specific port, or when trying to listen on a bound port. In
3197 * the latter case, the provided id_priv may already be on the bind_list, but
3198 * we still need to check that it's okay to start listening.
3199 */
3200static int cma_check_port(struct rdma_bind_list *bind_list,
3201 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 3202{
3203 struct rdma_id_private *cur_id;
43b752da 3204 struct sockaddr *addr, *cur_addr;
e51060f0 3205
f4753834 3206 addr = cma_src_addr(id_priv);
b67bfe0d 3207 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
a9bb7912
HS		 3208 if (id_priv == cur_id)
3209 continue;
3cd96564 3210
5b0ec991
SH		 3211 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3212 cur_id->reuseaddr)
3213 continue;
e51060f0 3214
f4753834 3215 cur_addr = cma_src_addr(cur_id);
5b0ec991
SH		 3216 if (id_priv->afonly && cur_id->afonly &&
3217 (addr->sa_family != cur_addr->sa_family))
3218 continue;
3219
3220 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3221 return -EADDRNOTAVAIL;
3222
3223 if (!cma_addr_cmp(addr, cur_addr))
3224 return -EADDRINUSE;
a9bb7912 3225 }
e51060f0
SH		 3226 return 0;
3227}
3228
2253fc0c 3229static int cma_use_port(enum rdma_ucm_port_space ps,
aac978e1 3230 struct rdma_id_private *id_priv)
a9bb7912
HS		 3231{
3232 struct rdma_bind_list *bind_list;
3233 unsigned short snum;
3234 int ret;
3235
f4753834 3236 snum = ntohs(cma_port(cma_src_addr(id_priv)));
a9bb7912
HS		 3237 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3238 return -EACCES;
3239
fa20105e 3240 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
a9bb7912
HS		 3241 if (!bind_list) {
3242 ret = cma_alloc_port(ps, id_priv, snum);
3243 } else {
3244 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3245 if (!ret)
3246 cma_bind_port(bind_list, id_priv);
3247 }
3248 return ret;
3249}
3250
3251static int cma_bind_listen(struct rdma_id_private *id_priv)
3252{
3253 struct rdma_bind_list *bind_list = id_priv->bind_list;
3254 int ret = 0;
3255
3256 mutex_lock(&lock);
3257 if (bind_list->owners.first->next)
3258 ret = cma_check_port(bind_list, id_priv, 0);
3259 mutex_unlock(&lock);
3260 return ret;
3261}
3262
2253fc0c
SW		 3263static enum rdma_ucm_port_space
3264cma_select_inet_ps(struct rdma_id_private *id_priv)
e51060f0 3265{
e51060f0 3266 switch (id_priv->id.ps) {
e51060f0 3267 case RDMA_PS_TCP:
628e5f6d 3268 case RDMA_PS_UDP:
c8f6a362 3269 case RDMA_PS_IPOIB:
2d2e9415 3270 case RDMA_PS_IB:
aac978e1 3271 return id_priv->id.ps;
e51060f0 3272 default:
aac978e1
HE		 3273
3274 return 0;
58afdcb7
SH		 3275 }
3276}
3277
2253fc0c
SW		 3278static enum rdma_ucm_port_space
3279cma_select_ib_ps(struct rdma_id_private *id_priv)
58afdcb7 3280{
2253fc0c 3281 enum rdma_ucm_port_space ps = 0;
58afdcb7
SH		 3282 struct sockaddr_ib *sib;
3283 u64 sid_ps, mask, sid;
3284
f4753834 3285 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
58afdcb7
SH		 3286 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3287 sid = be64_to_cpu(sib->sib_sid) & mask;
3288
3289 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3290 sid_ps = RDMA_IB_IP_PS_IB;
aac978e1 3291 ps = RDMA_PS_IB;
58afdcb7
SH		 3292 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3293 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3294 sid_ps = RDMA_IB_IP_PS_TCP;
aac978e1 3295 ps = RDMA_PS_TCP;
58afdcb7
SH		 3296 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3297 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3298 sid_ps = RDMA_IB_IP_PS_UDP;
aac978e1 3299 ps = RDMA_PS_UDP;
e51060f0
SH		 3300 }
3301
58afdcb7
SH		 3302 if (ps) {
3303 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3304 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3305 be64_to_cpu(sib->sib_sid_mask));
3306 }
3307 return ps;
3308}
3309
3310static int cma_get_port(struct rdma_id_private *id_priv)
3311{
2253fc0c 3312 enum rdma_ucm_port_space ps;
58afdcb7
SH		 3313 int ret;
3314
f4753834 3315 if (cma_family(id_priv) != AF_IB)
58afdcb7
SH		 3316 ps = cma_select_inet_ps(id_priv);
3317 else
3318 ps = cma_select_ib_ps(id_priv);
3319 if (!ps)
3320 return -EPROTONOSUPPORT;
3321
e51060f0 3322 mutex_lock(&lock);
f4753834 3323 if (cma_any_port(cma_src_addr(id_priv)))
aedec080 3324 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 3325 else
3326 ret = cma_use_port(ps, id_priv);
3327 mutex_unlock(&lock);
3328
3329 return ret;
3330}
3331
d14714df
SH		 3332static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3333 struct sockaddr *addr)
3334{
d90f9b35 3335#if IS_ENABLED(CONFIG_IPV6)
d14714df
SH		 3336 struct sockaddr_in6 *sin6;
3337
3338 if (addr->sa_family != AF_INET6)
3339 return 0;
3340
3341 sin6 = (struct sockaddr_in6 *) addr;
5462eddd
SK		 3342
3343 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3344 return 0;
3345
3346 if (!sin6->sin6_scope_id)
d14714df
SH		 3347 return -EINVAL;
3348
3349 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3350#endif
3351 return 0;
3352}
3353
a9bb7912
HS		 3354int rdma_listen(struct rdma_cm_id *id, int backlog)
3355{
3356 struct rdma_id_private *id_priv;
3357 int ret;
3358
3359 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3360 if (id_priv->state == RDMA_CM_IDLE) {
f4753834
SH		 3361 id->route.addr.src_addr.ss_family = AF_INET;
3362 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
a9bb7912
HS		 3363 if (ret)
3364 return ret;
3365 }
3366
550e5ca7 3367 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
a9bb7912
HS		 3368 return -EINVAL;
3369
3370 if (id_priv->reuseaddr) {
3371 ret = cma_bind_listen(id_priv);
3372 if (ret)
3373 goto err;
3374 }
3375
3376 id_priv->backlog = backlog;
3377 if (id->device) {
72219cea 3378 if (rdma_cap_ib_cm(id->device, 1)) {
a9bb7912
HS		 3379 ret = cma_ib_listen(id_priv);
3380 if (ret)
3381 goto err;
04215330 3382 } else if (rdma_cap_iw_cm(id->device, 1)) {
a9bb7912
HS		 3383 ret = cma_iw_listen(id_priv, backlog);
3384 if (ret)
3385 goto err;
21655afc 3386 } else {
a9bb7912
HS		 3387 ret = -ENOSYS;
3388 goto err;
3389 }
3390 } else
3391 cma_listen_on_all(id_priv);
3392
3393 return 0;
3394err:
3395 id_priv->backlog = 0;
550e5ca7 3396 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 3397 return ret;
3398}
3399EXPORT_SYMBOL(rdma_listen);
3400
e51060f0
SH		 3401int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3402{
3403 struct rdma_id_private *id_priv;
3404 int ret;
6df6b4a9 3405 struct sockaddr *daddr;
e51060f0 3406
680f920a
SH		 3407 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3408 addr->sa_family != AF_IB)
e51060f0
SH		 3409 return -EAFNOSUPPORT;
3410
3411 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3412 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 3413 return -EINVAL;
3414
d14714df
SH		 3415 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3416 if (ret)
3417 goto err1;
3418
7b85627b 3419 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
8523c048 3420 if (!cma_any_addr(addr)) {
680f920a 3421 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
e51060f0 3422 if (ret)
255d0c14
KK		 3423 goto err1;
3424
be9130cc 3425 ret = cma_acquire_dev(id_priv, NULL);
255d0c14
KK		 3426 if (ret)
3427 goto err1;
e51060f0
SH		 3428 }
3429
68602120
SH		 3430 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3431 if (addr->sa_family == AF_INET)
3432 id_priv->afonly = 1;
5b0ec991 3433#if IS_ENABLED(CONFIG_IPV6)
fa20105e
GS		 3434 else if (addr->sa_family == AF_INET6) {
3435 struct net *net = id_priv->id.route.addr.dev_addr.net;
3436
3437 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3438 }
5b0ec991 3439#endif
68602120 3440 }
9dea9a2f
TN		 3441 daddr = cma_dst_addr(id_priv);
3442 daddr->sa_family = addr->sa_family;
3443
e51060f0
SH		 3444 ret = cma_get_port(id_priv);
3445 if (ret)
255d0c14 3446 goto err2;
e51060f0
SH		 3447
3448 return 0;
255d0c14 3449err2:
00313983
SW		 3450 if (id_priv->cma_dev) {
3451 rdma_restrack_del(&id_priv->res);
a396d43a 3452 cma_release_dev(id_priv);
00313983 3453 }
255d0c14 3454err1:
550e5ca7 3455 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 3456 return ret;
3457}
3458EXPORT_SYMBOL(rdma_bind_addr);
3459
f4753834 3460static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
e51060f0 3461{
e51060f0 3462 struct cma_hdr *cma_hdr;
e51060f0 3463
01602f11
SH		 3464 cma_hdr = hdr;
3465 cma_hdr->cma_version = CMA_VERSION;
f4753834 3466 if (cma_family(id_priv) == AF_INET) {
1f5175ad
AS		 3467 struct sockaddr_in *src4, *dst4;
3468
f4753834
SH		 3469 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3470 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
1f5175ad 3471
01602f11
SH		 3472 cma_set_ip_ver(cma_hdr, 4);
3473 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3474 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3475 cma_hdr->port = src4->sin_port;
e8160e15 3476 } else if (cma_family(id_priv) == AF_INET6) {
1f5175ad
AS		 3477 struct sockaddr_in6 *src6, *dst6;
3478
f4753834
SH		 3479 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3480 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
1f5175ad 3481
01602f11
SH		 3482 cma_set_ip_ver(cma_hdr, 6);
3483 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3484 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3485 cma_hdr->port = src6->sin6_port;
e51060f0
SH		 3486 }
3487 return 0;
3488}
3489
628e5f6d 3490static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
e7ff98ae 3491 const struct ib_cm_event *ib_event)
628e5f6d
SH		 3492{
3493 struct rdma_id_private *id_priv = cm_id->context;
3494 struct rdma_cm_event event;
e7ff98ae
PP		 3495 const struct ib_cm_sidr_rep_event_param *rep =
3496 &ib_event->param.sidr_rep_rcvd;
628e5f6d
SH		 3497 int ret = 0;
3498
37e07cda
BVA		 3499 mutex_lock(&id_priv->handler_mutex);
3500 if (id_priv->state != RDMA_CM_CONNECT)
3501 goto out;
628e5f6d 3502
8aa08602 3503 memset(&event, 0, sizeof event);
628e5f6d
SH		 3504 switch (ib_event->event) {
3505 case IB_CM_SIDR_REQ_ERROR:
3506 event.event = RDMA_CM_EVENT_UNREACHABLE;
3507 event.status = -ETIMEDOUT;
3508 break;
3509 case IB_CM_SIDR_REP_RECEIVED:
3510 event.param.ud.private_data = ib_event->private_data;
3511 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3512 if (rep->status != IB_SIDR_SUCCESS) {
3513 event.event = RDMA_CM_EVENT_UNREACHABLE;
3514 event.status = ib_event->param.sidr_rep_rcvd.status;
498683c6
MS		 3515 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3516 event.status);
628e5f6d
SH		 3517 break;
3518 }
5c438135 3519 ret = cma_set_qkey(id_priv, rep->qkey);
d2ca39f2 3520 if (ret) {
498683c6 3521 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
d2ca39f2 3522 event.event = RDMA_CM_EVENT_ADDR_ERROR;
5c438135 3523 event.status = ret;
628e5f6d
SH		 3524 break;
3525 }
4ad6a024
PP		 3526 ib_init_ah_attr_from_path(id_priv->id.device,
3527 id_priv->id.port_num,
3528 id_priv->id.route.path_rec,
39839107
PP		 3529 &event.param.ud.ah_attr,
3530 rep->sgid_attr);
628e5f6d
SH		 3531 event.param.ud.qp_num = rep->qpn;
3532 event.param.ud.qkey = rep->qkey;
3533 event.event = RDMA_CM_EVENT_ESTABLISHED;
3534 event.status = 0;
3535 break;
3536 default:
aba25a3e 3537 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 3538 ib_event->event);
3539 goto out;
3540 }
3541
3542 ret = id_priv->id.event_handler(&id_priv->id, &event);
aa74f487
PP		 3543
3544 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
628e5f6d
SH		 3545 if (ret) {
3546 /* Destroy the CM ID by returning a non-zero value. */
3547 id_priv->cm_id.ib = NULL;
550e5ca7 3548 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 3549 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 3550 rdma_destroy_id(&id_priv->id);
3551 return ret;
3552 }
3553out:
de910bd9 3554 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 3555 return ret;
3556}
3557
3558static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3559 struct rdma_conn_param *conn_param)
3560{
3561 struct ib_cm_sidr_req_param req;
0c9361fc 3562 struct ib_cm_id *id;
e511d1ae 3563 void *private_data;
c0b64f58
BVA		 3564 u8 offset;
3565 int ret;
628e5f6d 3566
e511d1ae 3567 memset(&req, 0, sizeof req);
e8160e15
SH		 3568 offset = cma_user_data_offset(id_priv);
3569 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 3570 if (req.private_data_len < conn_param->private_data_len)
3571 return -EINVAL;
3572
e8160e15 3573 if (req.private_data_len) {
e511d1ae
SH		 3574 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3575 if (!private_data)
e8160e15
SH		 3576 return -ENOMEM;
3577 } else {
e511d1ae 3578 private_data = NULL;
e8160e15 3579 }
628e5f6d
SH		 3580
3581 if (conn_param->private_data && conn_param->private_data_len)
e511d1ae
SH		 3582 memcpy(private_data + offset, conn_param->private_data,
3583 conn_param->private_data_len);
628e5f6d 3584
e511d1ae
SH		 3585 if (private_data) {
3586 ret = cma_format_hdr(private_data, id_priv);
e8160e15
SH		 3587 if (ret)
3588 goto out;
e511d1ae 3589 req.private_data = private_data;
e8160e15 3590 }
628e5f6d 3591
0c9361fc
JM		 3592 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3593 id_priv);
3594 if (IS_ERR(id)) {
3595 ret = PTR_ERR(id);
628e5f6d
SH		 3596 goto out;
3597 }
0c9361fc 3598 id_priv->cm_id.ib = id;
628e5f6d 3599
f4753834 3600 req.path = id_priv->id.route.path_rec;
815d456e 3601 req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
cf53936f 3602 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
628e5f6d
SH		 3603 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3604 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3605
3606 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3607 if (ret) {
3608 ib_destroy_cm_id(id_priv->cm_id.ib);
3609 id_priv->cm_id.ib = NULL;
3610 }
3611out:
e511d1ae 3612 kfree(private_data);
628e5f6d
SH		 3613 return ret;
3614}
3615
e51060f0
SH		 3616static int cma_connect_ib(struct rdma_id_private *id_priv,
3617 struct rdma_conn_param *conn_param)
3618{
3619 struct ib_cm_req_param req;
3620 struct rdma_route *route;
3621 void *private_data;
0c9361fc 3622 struct ib_cm_id *id;
c0b64f58
BVA		 3623 u8 offset;
3624 int ret;
e51060f0
SH		 3625
3626 memset(&req, 0, sizeof req);
e8160e15 3627 offset = cma_user_data_offset(id_priv);
e51060f0 3628 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 3629 if (req.private_data_len < conn_param->private_data_len)
3630 return -EINVAL;
3631
e8160e15
SH		 3632 if (req.private_data_len) {
3633 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3634 if (!private_data)
3635 return -ENOMEM;
3636 } else {
3637 private_data = NULL;
3638 }
e51060f0
SH		 3639
3640 if (conn_param->private_data && conn_param->private_data_len)
3641 memcpy(private_data + offset, conn_param->private_data,
3642 conn_param->private_data_len);
3643
0c9361fc
JM		 3644 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3645 if (IS_ERR(id)) {
3646 ret = PTR_ERR(id);
e51060f0
SH		 3647 goto out;
3648 }
0c9361fc 3649 id_priv->cm_id.ib = id;
e51060f0
SH		 3650
3651 route = &id_priv->id.route;
e8160e15
SH		 3652 if (private_data) {
3653 ret = cma_format_hdr(private_data, id_priv);
3654 if (ret)
3655 goto out;
3656 req.private_data = private_data;
3657 }
e51060f0
SH		 3658
3659 req.primary_path = &route->path_rec[0];
3660 if (route->num_paths == 2)
3661 req.alternate_path = &route->path_rec[1];
3662
815d456e
PP		 3663 req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3664 /* Alternate path SGID attribute currently unsupported */
cf53936f 3665 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
e51060f0 3666 req.qp_num = id_priv->qp_num;
18c441a6 3667 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 3668 req.starting_psn = id_priv->seq_num;
3669 req.responder_resources = conn_param->responder_resources;
3670 req.initiator_depth = conn_param->initiator_depth;
3671 req.flow_control = conn_param->flow_control;
4ede178a
SH		 3672 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3673 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 3674 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3675 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3676 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3677 req.srq = id_priv->srq ? 1 : 0;
3678
3679 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3680out:
0c9361fc
JM		 3681 if (ret && !IS_ERR(id)) {
3682 ib_destroy_cm_id(id);
675a027c
KK		 3683 id_priv->cm_id.ib = NULL;
3684 }
3685
e51060f0
SH		 3686 kfree(private_data);
3687 return ret;
3688}
3689
07ebafba
TT		 3690static int cma_connect_iw(struct rdma_id_private *id_priv,
3691 struct rdma_conn_param *conn_param)
3692{
3693 struct iw_cm_id *cm_id;
07ebafba
TT		 3694 int ret;
3695 struct iw_cm_conn_param iw_param;
3696
3697 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 3698 if (IS_ERR(cm_id))
3699 return PTR_ERR(cm_id);
07ebafba 3700
68cdba06 3701 cm_id->tos = id_priv->tos;
07ebafba
TT		 3702 id_priv->cm_id.iw = cm_id;
3703
24d44a39
SW		 3704 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3705 rdma_addr_size(cma_src_addr(id_priv)));
3706 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3707 rdma_addr_size(cma_dst_addr(id_priv)));
07ebafba 3708
5851bb89 3709 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 3710 if (ret)
3711 goto out;
07ebafba 3712
f45ee80e
HS		 3713 if (conn_param) {
3714 iw_param.ord = conn_param->initiator_depth;
3715 iw_param.ird = conn_param->responder_resources;
3716 iw_param.private_data = conn_param->private_data;
3717 iw_param.private_data_len = conn_param->private_data_len;
3718 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3719 } else {
3720 memset(&iw_param, 0, sizeof iw_param);
07ebafba 3721 iw_param.qpn = id_priv->qp_num;
f45ee80e 3722 }
07ebafba
TT		 3723 ret = iw_cm_connect(cm_id, &iw_param);
3724out:
0c9361fc 3725 if (ret) {
675a027c
KK		 3726 iw_destroy_cm_id(cm_id);
3727 id_priv->cm_id.iw = NULL;
3728 }
07ebafba
TT		 3729 return ret;
3730}
3731
e51060f0
SH		 3732int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3733{
3734 struct rdma_id_private *id_priv;
3735 int ret;
3736
3737 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3738 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
e51060f0
SH		 3739 return -EINVAL;
3740
3741 if (!id->qp) {
3742 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3743 id_priv->srq = conn_param->srq;
3744 }
3745
72219cea 3746 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 3747 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 3748 ret = cma_resolve_ib_udp(id_priv, conn_param);
3749 else
3750 ret = cma_connect_ib(id_priv, conn_param);
04215330 3751 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 3752 ret = cma_connect_iw(id_priv, conn_param);
21655afc 3753 else
e51060f0 3754 ret = -ENOSYS;
e51060f0
SH		 3755 if (ret)
3756 goto err;
3757
3758 return 0;
3759err:
550e5ca7 3760 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
e51060f0
SH		 3761 return ret;
3762}
3763EXPORT_SYMBOL(rdma_connect);
3764
3765static int cma_accept_ib(struct rdma_id_private *id_priv,
3766 struct rdma_conn_param *conn_param)
3767{
3768 struct ib_cm_rep_param rep;
5851bb89 3769 int ret;
0fe313b0 3770
5851bb89
SH		 3771 ret = cma_modify_qp_rtr(id_priv, conn_param);
3772 if (ret)
3773 goto out;
0fe313b0 3774
5851bb89
SH		 3775 ret = cma_modify_qp_rts(id_priv, conn_param);
3776 if (ret)
3777 goto out;
e51060f0
SH		 3778
3779 memset(&rep, 0, sizeof rep);
3780 rep.qp_num = id_priv->qp_num;
3781 rep.starting_psn = id_priv->seq_num;
3782 rep.private_data = conn_param->private_data;
3783 rep.private_data_len = conn_param->private_data_len;
3784 rep.responder_resources = conn_param->responder_resources;
3785 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 3786 rep.failover_accepted = 0;
3787 rep.flow_control = conn_param->flow_control;
4ede178a 3788 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 3789 rep.srq = id_priv->srq ? 1 : 0;
3790
0fe313b0
SH		 3791 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3792out:
3793 return ret;
e51060f0
SH		 3794}
3795
07ebafba
TT		 3796static int cma_accept_iw(struct rdma_id_private *id_priv,
3797 struct rdma_conn_param *conn_param)
3798{
3799 struct iw_cm_conn_param iw_param;
3800 int ret;
3801
f2625f7d
SW		 3802 if (!conn_param)
3803 return -EINVAL;
3804
5851bb89 3805 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 3806 if (ret)
3807 return ret;
3808
3809 iw_param.ord = conn_param->initiator_depth;
3810 iw_param.ird = conn_param->responder_resources;
3811 iw_param.private_data = conn_param->private_data;
3812 iw_param.private_data_len = conn_param->private_data_len;
3813 if (id_priv->id.qp) {
3814 iw_param.qpn = id_priv->qp_num;
3815 } else
3816 iw_param.qpn = conn_param->qp_num;
3817
3818 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3819}
3820
628e5f6d 3821static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
5c438135 3822 enum ib_cm_sidr_status status, u32 qkey,
628e5f6d
SH		 3823 const void *private_data, int private_data_len)
3824{
3825 struct ib_cm_sidr_rep_param rep;
d2ca39f2 3826 int ret;
628e5f6d
SH		 3827
3828 memset(&rep, 0, sizeof rep);
3829 rep.status = status;
3830 if (status == IB_SIDR_SUCCESS) {
5c438135 3831 ret = cma_set_qkey(id_priv, qkey);
d2ca39f2
YE		 3832 if (ret)
3833 return ret;
628e5f6d 3834 rep.qp_num = id_priv->qp_num;
c8f6a362 3835 rep.qkey = id_priv->qkey;
628e5f6d
SH		 3836 }
3837 rep.private_data = private_data;
3838 rep.private_data_len = private_data_len;
3839
3840 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3841}
3842
00313983
SW		 3843int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
3844 const char *caller)
e51060f0
SH		 3845{
3846 struct rdma_id_private *id_priv;
3847 int ret;
3848
3849 id_priv = container_of(id, struct rdma_id_private, id);
83e9502d 3850
00313983
SW		 3851 if (caller)
3852 id_priv->res.kern_name = caller;
3853 else
3854 rdma_restrack_set_task(&id_priv->res, current);
83e9502d 3855
550e5ca7 3856 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
e51060f0
SH		 3857 return -EINVAL;
3858
3859 if (!id->qp && conn_param) {
3860 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3861 id_priv->srq = conn_param->srq;
3862 }
3863
72219cea 3864 if (rdma_cap_ib_cm(id->device, id->port_num)) {
f45ee80e
HS		 3865 if (id->qp_type == IB_QPT_UD) {
3866 if (conn_param)
3867 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3868 conn_param->qkey,
f45ee80e
HS		 3869 conn_param->private_data,
3870 conn_param->private_data_len);
3871 else
3872 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3873 0, NULL, 0);
f45ee80e
HS		 3874 } else {
3875 if (conn_param)
3876 ret = cma_accept_ib(id_priv, conn_param);
3877 else
3878 ret = cma_rep_recv(id_priv);
3879 }
04215330 3880 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 3881 ret = cma_accept_iw(id_priv, conn_param);
21655afc 3882 else
e51060f0 3883 ret = -ENOSYS;
e51060f0
SH		 3884
3885 if (ret)
3886 goto reject;
3887
3888 return 0;
3889reject:
c5483388 3890 cma_modify_qp_err(id_priv);
e51060f0
SH		 3891 rdma_reject(id, NULL, 0);
3892 return ret;
3893}
00313983 3894EXPORT_SYMBOL(__rdma_accept);
e51060f0 3895
0fe313b0
SH		 3896int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3897{
3898 struct rdma_id_private *id_priv;
3899 int ret;
3900
3901 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3902 if (!id_priv->cm_id.ib)
0fe313b0
SH		 3903 return -EINVAL;
3904
3905 switch (id->device->node_type) {
3906 case RDMA_NODE_IB_CA:
3907 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3908 break;
3909 default:
3910 ret = 0;
3911 break;
3912 }
3913 return ret;
3914}
3915EXPORT_SYMBOL(rdma_notify);
3916
e51060f0
SH		 3917int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3918 u8 private_data_len)
3919{
3920 struct rdma_id_private *id_priv;
3921 int ret;
3922
3923 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3924 if (!id_priv->cm_id.ib)
e51060f0
SH		 3925 return -EINVAL;
3926
72219cea 3927 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 3928 if (id->qp_type == IB_QPT_UD)
5c438135 3929 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
628e5f6d
SH		 3930 private_data, private_data_len);
3931 else
3932 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3933 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3934 0, private_data, private_data_len);
04215330 3935 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba
TT		 3936 ret = iw_cm_reject(id_priv->cm_id.iw,
3937 private_data, private_data_len);
21655afc 3938 } else
e51060f0 3939 ret = -ENOSYS;
21655afc 3940
e51060f0
SH		 3941 return ret;
3942}
3943EXPORT_SYMBOL(rdma_reject);
3944
3945int rdma_disconnect(struct rdma_cm_id *id)
3946{
3947 struct rdma_id_private *id_priv;
3948 int ret;
3949
3950 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3951 if (!id_priv->cm_id.ib)
e51060f0
SH		 3952 return -EINVAL;
3953
72219cea 3954 if (rdma_cap_ib_cm(id->device, id->port_num)) {
c5483388 3955 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 3956 if (ret)
3957 goto out;
e51060f0
SH		 3958 /* Initiate or respond to a disconnect. */
3959 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3960 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
04215330 3961 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba 3962 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
21655afc 3963 } else
07ebafba 3964 ret = -EINVAL;
21655afc 3965
e51060f0
SH		 3966out:
3967 return ret;
3968}
3969EXPORT_SYMBOL(rdma_disconnect);
3970
c8f6a362
SH		 3971static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3972{
3973 struct rdma_id_private *id_priv;
3974 struct cma_multicast *mc = multicast->context;
3975 struct rdma_cm_event event;
37e07cda 3976 int ret = 0;
c8f6a362
SH		 3977
3978 id_priv = mc->id_priv;
37e07cda
BVA		 3979 mutex_lock(&id_priv->handler_mutex);
3980 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3981 id_priv->state != RDMA_CM_ADDR_RESOLVED)
3982 goto out;
c8f6a362 3983
5c438135
SH		 3984 if (!status)
3985 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
498683c6
MS		 3986 else
3987 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
3988 status);
c5483388 3989 mutex_lock(&id_priv->qp_mutex);
498683c6 3990 if (!status && id_priv->id.qp) {
c8f6a362 3991 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
46ea5061 3992 be16_to_cpu(multicast->rec.mlid));
a3dd3a48 3993 if (status)
498683c6
MS		 3994 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
3995 status);
3996 }
c5483388 3997 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 3998
3999 memset(&event, 0, sizeof event);
4000 event.status = status;
4001 event.param.ud.private_data = mc->context;
4002 if (!status) {
bee3c3c9
MS		 4003 struct rdma_dev_addr *dev_addr =
4004 &id_priv->id.route.addr.dev_addr;
4005 struct net_device *ndev =
052eac6e 4006 dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
bee3c3c9
MS		 4007 enum ib_gid_type gid_type =
4008 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4009 rdma_start_port(id_priv->cma_dev->device)];
4010
c8f6a362 4011 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
6d337179
PP		 4012 ret = ib_init_ah_from_mcmember(id_priv->id.device,
4013 id_priv->id.port_num,
4014 &multicast->rec,
4015 ndev, gid_type,
4016 &event.param.ud.ah_attr);
4017 if (ret)
4018 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4019
c8f6a362
SH		 4020 event.param.ud.qp_num = 0xFFFFFF;
4021 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
bee3c3c9
MS		 4022 if (ndev)
4023 dev_put(ndev);
c8f6a362
SH		 4024 } else
4025 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4026
4027 ret = id_priv->id.event_handler(&id_priv->id, &event);
f685c195
PP		 4028
4029 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
c8f6a362 4030 if (ret) {
550e5ca7 4031 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 4032 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 4033 rdma_destroy_id(&id_priv->id);
4034 return 0;
4035 }
8aa08602 4036
37e07cda 4037out:
de910bd9 4038 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 4039 return 0;
4040}
4041
4042static void cma_set_mgid(struct rdma_id_private *id_priv,
4043 struct sockaddr *addr, union ib_gid *mgid)
4044{
4045 unsigned char mc_map[MAX_ADDR_LEN];
4046 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4047 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4048 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4049
4050 if (cma_any_addr(addr)) {
4051 memset(mgid, 0, sizeof *mgid);
4052 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 4053 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 4054 0xFF10A01B)) {
4055 /* IPv6 address is an SA assigned MGID. */
4056 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
5bc2b7b3
SH		 4057 } else if (addr->sa_family == AF_IB) {
4058 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
076dd53b 4059 } else if (addr->sa_family == AF_INET6) {
e2e62697
JG		 4060 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4061 if (id_priv->id.ps == RDMA_PS_UDP)
4062 mc_map[7] = 0x01; /* Use RDMA CM signature */
4063 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 4064 } else {
a9e527e3 4065 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 4066 if (id_priv->id.ps == RDMA_PS_UDP)
4067 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 4068 *mgid = *(union ib_gid *) (mc_map + 4);
4069 }
4070}
4071
4072static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4073 struct cma_multicast *mc)
4074{
4075 struct ib_sa_mcmember_rec rec;
4076 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4077 ib_sa_comp_mask comp_mask;
4078 int ret;
4079
4080 ib_addr_get_mgid(dev_addr, &rec.mgid);
4081 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4082 &rec.mgid, &rec);
4083 if (ret)
4084 return ret;
4085
5bc2b7b3
SH		 4086 ret = cma_set_qkey(id_priv, 0);
4087 if (ret)
4088 return ret;
4089
3f446754 4090 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
5bc2b7b3 4091 rec.qkey = cpu_to_be32(id_priv->qkey);
6f8372b6 4092 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362 4093 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
ab15c95a
AV		 4094 rec.join_state = mc->join_state;
4095
ee1c60b1
DC		 4096 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
4097 (!ib_sa_sendonly_fullmem_support(&sa_client,
4098 id_priv->id.device,
4099 id_priv->id.port_num))) {
4100 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
4101 "RDMA CM: SM doesn't support Send Only Full Member option\n",
4102 id_priv->id.device->name, id_priv->id.port_num);
4103 return -EOPNOTSUPP;
ab15c95a 4104 }
c8f6a362
SH		 4105
4106 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4107 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4108 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4109 IB_SA_MCMEMBER_REC_FLOW_LABEL |
4110 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4111
84adeee9
YE		 4112 if (id_priv->id.ps == RDMA_PS_IPOIB)
4113 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2a22fb8c
DB		 4114 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4115 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4116 IB_SA_MCMEMBER_REC_MTU |
4117 IB_SA_MCMEMBER_REC_HOP_LIMIT;
84adeee9 4118
c8f6a362
SH		 4119 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4120 id_priv->id.port_num, &rec,
4121 comp_mask, GFP_KERNEL,
4122 cma_ib_mc_handler, mc);
8c6ffba0 4123 return PTR_ERR_OR_ZERO(mc->multicast.ib);
c8f6a362
SH		 4124}
4125
3c86aa70
EC		 4126static void iboe_mcast_work_handler(struct work_struct *work)
4127{
4128 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4129 struct cma_multicast *mc = mw->mc;
4130 struct ib_sa_multicast *m = mc->multicast.ib;
4131
4132 mc->multicast.ib->context = mc;
4133 cma_ib_mc_handler(0, m);
4134 kref_put(&mc->mcref, release_mc);
4135 kfree(mw);
4136}
4137
be1d325a
NO		 4138static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4139 enum ib_gid_type gid_type)
3c86aa70
EC		 4140{
4141 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4142 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4143
4144 if (cma_any_addr(addr)) {
4145 memset(mgid, 0, sizeof *mgid);
4146 } else if (addr->sa_family == AF_INET6) {
4147 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4148 } else {
5c181bda
PP		 4149 mgid->raw[0] =
4150 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4151 mgid->raw[1] =
4152 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
3c86aa70
EC		 4153 mgid->raw[2] = 0;
4154 mgid->raw[3] = 0;
4155 mgid->raw[4] = 0;
4156 mgid->raw[5] = 0;
4157 mgid->raw[6] = 0;
4158 mgid->raw[7] = 0;
4159 mgid->raw[8] = 0;
4160 mgid->raw[9] = 0;
4161 mgid->raw[10] = 0xff;
4162 mgid->raw[11] = 0xff;
4163 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4164 }
4165}
4166
4167static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4168 struct cma_multicast *mc)
4169{
4170 struct iboe_mcast_work *work;
4171 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
bee3c3c9 4172 int err = 0;
3c86aa70
EC		 4173 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4174 struct net_device *ndev = NULL;
bee3c3c9 4175 enum ib_gid_type gid_type;
ab15c95a
AV		 4176 bool send_only;
4177
4178 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
3c86aa70
EC		 4179
4180 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4181 return -EINVAL;
4182
4183 work = kzalloc(sizeof *work, GFP_KERNEL);
4184 if (!work)
4185 return -ENOMEM;
4186
4187 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4188 if (!mc->multicast.ib) {
4189 err = -ENOMEM;
4190 goto out1;
4191 }
4192
be1d325a
NO		 4193 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4194 rdma_start_port(id_priv->cma_dev->device)];
4195 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
3c86aa70
EC		 4196
4197 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4198 if (id_priv->id.ps == RDMA_PS_UDP)
4199 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4200
4201 if (dev_addr->bound_dev_if)
052eac6e 4202 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
3c86aa70
EC		 4203 if (!ndev) {
4204 err = -ENODEV;
4205 goto out2;
4206 }
4207 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4208 mc->multicast.ib->rec.hop_limit = 1;
4209 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
bee3c3c9 4210
bee3c3c9 4211 if (addr->sa_family == AF_INET) {
c65f6c5a
AV		 4212 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4213 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
ab15c95a
AV		 4214 if (!send_only) {
4215 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4216 true);
ab15c95a 4217 }
bee3c3c9
MS		 4218 }
4219 } else {
4220 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4221 err = -ENOTSUPP;
4222 }
3c86aa70 4223 dev_put(ndev);
bee3c3c9
MS		 4224 if (err || !mc->multicast.ib->rec.mtu) {
4225 if (!err)
4226 err = -EINVAL;
3c86aa70
EC		 4227 goto out2;
4228 }
7b85627b
MS		 4229 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4230 &mc->multicast.ib->rec.port_gid);
3c86aa70
EC		 4231 work->id = id_priv;
4232 work->mc = mc;
4233 INIT_WORK(&work->work, iboe_mcast_work_handler);
4234 kref_get(&mc->mcref);
4235 queue_work(cma_wq, &work->work);
4236
4237 return 0;
4238
4239out2:
4240 kfree(mc->multicast.ib);
4241out1:
4242 kfree(work);
4243 return err;
4244}
4245
c8f6a362 4246int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
ab15c95a 4247 u8 join_state, void *context)
c8f6a362
SH		 4248{
4249 struct rdma_id_private *id_priv;
4250 struct cma_multicast *mc;
4251 int ret;
4252
7688f2c3
LR		 4253 if (!id->device)
4254 return -EINVAL;
4255
c8f6a362 4256 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 4257 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4258 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 4259 return -EINVAL;
4260
4261 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4262 if (!mc)
4263 return -ENOMEM;
4264
ef560861 4265 memcpy(&mc->addr, addr, rdma_addr_size(addr));
c8f6a362
SH		 4266 mc->context = context;
4267 mc->id_priv = id_priv;
ab15c95a 4268 mc->join_state = join_state;
c8f6a362 4269
5d9fb044 4270 if (rdma_protocol_roce(id->device, id->port_num)) {
5c9a5282
MW		 4271 kref_init(&mc->mcref);
4272 ret = cma_iboe_join_multicast(id_priv, mc);
c0126915
JG		 4273 if (ret)
4274 goto out_err;
4275 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
5c9a5282 4276 ret = cma_join_ib_multicast(id_priv, mc);
c0126915
JG		 4277 if (ret)
4278 goto out_err;
4279 } else {
c8f6a362 4280 ret = -ENOSYS;
c0126915 4281 goto out_err;
c8f6a362 4282 }
c0126915
JG		 4283
4284 spin_lock(&id_priv->lock);
4285 list_add(&mc->list, &id_priv->mc_list);
4286 spin_unlock(&id_priv->lock);
4287
4288 return 0;
4289out_err:
4290 kfree(mc);
c8f6a362
SH		 4291 return ret;
4292}
4293EXPORT_SYMBOL(rdma_join_multicast);
4294
4295void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4296{
4297 struct rdma_id_private *id_priv;
4298 struct cma_multicast *mc;
4299
4300 id_priv = container_of(id, struct rdma_id_private, id);
4301 spin_lock_irq(&id_priv->lock);
4302 list_for_each_entry(mc, &id_priv->mc_list, list) {
ef560861 4303 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
c8f6a362
SH		 4304 list_del(&mc->list);
4305 spin_unlock_irq(&id_priv->lock);
4306
4307 if (id->qp)
4308 ib_detach_mcast(id->qp,
4309 &mc->multicast.ib->rec.mgid,
46ea5061 4310 be16_to_cpu(mc->multicast.ib->rec.mlid));
5c9a5282
MW		 4311
4312 BUG_ON(id_priv->cma_dev->device != id->device);
4313
a31ad3b0 4314 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
5c9a5282
MW		 4315 ib_sa_free_multicast(mc->multicast.ib);
4316 kfree(mc);
bee3c3c9 4317 } else if (rdma_protocol_roce(id->device, id->port_num)) {
88145678 4318 cma_leave_roce_mc_group(id_priv, mc);
bee3c3c9 4319 }
c8f6a362
SH		 4320 return;
4321 }
4322 }
4323 spin_unlock_irq(&id_priv->lock);
4324}
4325EXPORT_SYMBOL(rdma_leave_multicast);
4326
dd5bdff8
OG		 4327static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4328{
4329 struct rdma_dev_addr *dev_addr;
4330 struct cma_ndev_work *work;
4331
4332 dev_addr = &id_priv->id.route.addr.dev_addr;
4333
6266ed6e 4334 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
fa20105e 4335 (net_eq(dev_net(ndev), dev_addr->net)) &&
dd5bdff8 4336 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
aba25a3e
PP		 4337 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4338 ndev->name, &id_priv->id);
dd5bdff8
OG		 4339 work = kzalloc(sizeof *work, GFP_KERNEL);
4340 if (!work)
4341 return -ENOMEM;
4342
4343 INIT_WORK(&work->work, cma_ndev_work_handler);
4344 work->id = id_priv;
4345 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4346 atomic_inc(&id_priv->refcount);
4347 queue_work(cma_wq, &work->work);
4348 }
4349
4350 return 0;
4351}
4352
4353static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
351638e7 4354 void *ptr)
dd5bdff8 4355{
351638e7 4356 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
dd5bdff8
OG		 4357 struct cma_device *cma_dev;
4358 struct rdma_id_private *id_priv;
4359 int ret = NOTIFY_DONE;
4360
dd5bdff8
OG		 4361 if (event != NETDEV_BONDING_FAILOVER)
4362 return NOTIFY_DONE;
4363
3cd96fdd 4364 if (!netif_is_bond_master(ndev))
dd5bdff8
OG		 4365 return NOTIFY_DONE;
4366
4367 mutex_lock(&lock);
4368 list_for_each_entry(cma_dev, &dev_list, list)
4369 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4370 ret = cma_netdev_change(ndev, id_priv);
4371 if (ret)
4372 goto out;
4373 }
4374
4375out:
4376 mutex_unlock(&lock);
4377 return ret;
4378}
4379
4380static struct notifier_block cma_nb = {
4381 .notifier_call = cma_netdev_callback
4382};
4383
e51060f0
SH		 4384static void cma_add_one(struct ib_device *device)
4385{
4386 struct cma_device *cma_dev;
4387 struct rdma_id_private *id_priv;
045959db
MB		 4388 unsigned int i;
4389 unsigned long supported_gids = 0;
e51060f0
SH		 4390
4391 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4392 if (!cma_dev)
4393 return;
4394
4395 cma_dev->device = device;
045959db
MB		 4396 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4397 sizeof(*cma_dev->default_gid_type),
4398 GFP_KERNEL);
89052d78
MD		 4399 if (!cma_dev->default_gid_type)
4400 goto free_cma_dev;
4401
4402 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4403 sizeof(*cma_dev->default_roce_tos),
4404 GFP_KERNEL);
4405 if (!cma_dev->default_roce_tos)
4406 goto free_gid_type;
4407
045959db
MB		 4408 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4409 supported_gids = roce_gid_type_mask_support(device, i);
4410 WARN_ON(!supported_gids);
5ab2d89b 4411 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
63a5f483
MS		 4412 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4413 CMA_PREFERRED_ROCE_GID_TYPE;
4414 else
4415 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4416 find_first_bit(&supported_gids, BITS_PER_LONG);
89052d78 4417 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
045959db 4418 }
e51060f0
SH		 4419
4420 init_completion(&cma_dev->comp);
4421 atomic_set(&cma_dev->refcount, 1);
4422 INIT_LIST_HEAD(&cma_dev->id_list);
4423 ib_set_client_data(device, &cma_client, cma_dev);
4424
4425 mutex_lock(&lock);
4426 list_add_tail(&cma_dev->list, &dev_list);
4427 list_for_each_entry(id_priv, &listen_any_list, list)
4428 cma_listen_on_dev(id_priv, cma_dev);
4429 mutex_unlock(&lock);
89052d78
MD		 4430
4431 return;
4432
4433free_gid_type:
4434 kfree(cma_dev->default_gid_type);
4435
4436free_cma_dev:
4437 kfree(cma_dev);
4438
4439 return;
e51060f0
SH		 4440}
4441
4442static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4443{
a1b1b61f 4444 struct rdma_cm_event event;
550e5ca7 4445 enum rdma_cm_state state;
de910bd9 4446 int ret = 0;
e51060f0
SH		 4447
4448 /* Record that we want to remove the device */
550e5ca7
NM		 4449 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4450 if (state == RDMA_CM_DESTROYING)
e51060f0
SH		 4451 return 0;
4452
4453 cma_cancel_operation(id_priv, state);
de910bd9 4454 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 4455
4456 /* Check for destruction from another callback. */
550e5ca7 4457 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
de910bd9 4458 goto out;
e51060f0 4459
a1b1b61f
SH		 4460 memset(&event, 0, sizeof event);
4461 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 4462 ret = id_priv->id.event_handler(&id_priv->id, &event);
4463out:
4464 mutex_unlock(&id_priv->handler_mutex);
4465 return ret;
e51060f0
SH		 4466}
4467
4468static void cma_process_remove(struct cma_device *cma_dev)
4469{
e51060f0
SH		 4470 struct rdma_id_private *id_priv;
4471 int ret;
4472
e51060f0
SH		 4473 mutex_lock(&lock);
4474 while (!list_empty(&cma_dev->id_list)) {
4475 id_priv = list_entry(cma_dev->id_list.next,
4476 struct rdma_id_private, list);
4477
d02d1f53 4478 list_del(&id_priv->listen_list);
94de178a 4479 list_del_init(&id_priv->list);
e51060f0
SH		 4480 atomic_inc(&id_priv->refcount);
4481 mutex_unlock(&lock);
4482
d02d1f53 4483 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 4484 cma_deref_id(id_priv);
4485 if (ret)
4486 rdma_destroy_id(&id_priv->id);
4487
4488 mutex_lock(&lock);
4489 }
4490 mutex_unlock(&lock);
4491
4492 cma_deref_dev(cma_dev);
4493 wait_for_completion(&cma_dev->comp);
4494}
4495
7c1eb45a 4496static void cma_remove_one(struct ib_device *device, void *client_data)
e51060f0 4497{
7c1eb45a 4498 struct cma_device *cma_dev = client_data;
e51060f0 4499
e51060f0
SH		 4500 if (!cma_dev)
4501 return;
4502
4503 mutex_lock(&lock);
4504 list_del(&cma_dev->list);
4505 mutex_unlock(&lock);
4506
4507 cma_process_remove(cma_dev);
89052d78 4508 kfree(cma_dev->default_roce_tos);
045959db 4509 kfree(cma_dev->default_gid_type);
e51060f0
SH		 4510 kfree(cma_dev);
4511}
4512
753f618a
NM		 4513static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4514{
4515 struct nlmsghdr *nlh;
4516 struct rdma_cm_id_stats *id_stats;
4517 struct rdma_id_private *id_priv;
4518 struct rdma_cm_id *id = NULL;
4519 struct cma_device *cma_dev;
4520 int i_dev = 0, i_id = 0;
4521
4522 /*
4523 * We export all of the IDs as a sequence of messages. Each
4524 * ID gets its own netlink message.
4525 */
4526 mutex_lock(&lock);
4527
4528 list_for_each_entry(cma_dev, &dev_list, list) {
4529 if (i_dev < cb->args[0]) {
4530 i_dev++;
4531 continue;
4532 }
4533
4534 i_id = 0;
4535 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4536 if (i_id < cb->args[1]) {
4537 i_id++;
4538 continue;
4539 }
4540
4541 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4542 sizeof *id_stats, RDMA_NL_RDMA_CM,
30dc5e63
TN		 4543 RDMA_NL_RDMA_CM_ID_STATS,
4544 NLM_F_MULTI);
753f618a
NM		 4545 if (!id_stats)
4546 goto out;
4547
4548 memset(id_stats, 0, sizeof *id_stats);
4549 id = &id_priv->id;
4550 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4551 id_stats->port_num = id->port_num;
4552 id_stats->bound_dev_if =
4553 id->route.addr.dev_addr.bound_dev_if;
4554
ce117ffa
SH		 4555 if (ibnl_put_attr(skb, nlh,
4556 rdma_addr_size(cma_src_addr(id_priv)),
4557 cma_src_addr(id_priv),
4558 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4559 goto out;
4560 if (ibnl_put_attr(skb, nlh,
7baaa49a 4561 rdma_addr_size(cma_dst_addr(id_priv)),
ce117ffa
SH		 4562 cma_dst_addr(id_priv),
4563 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4564 goto out;
753f618a 4565
00313983 4566 id_stats->pid = task_pid_vnr(id_priv->res.task);
753f618a
NM		 4567 id_stats->port_space = id->ps;
4568 id_stats->cm_state = id_priv->state;
4569 id_stats->qp_num = id_priv->qp_num;
4570 id_stats->qp_type = id->qp_type;
4571
4572 i_id++;
e48e5e19 4573 nlmsg_end(skb, nlh);
753f618a
NM		 4574 }
4575
4576 cb->args[1] = 0;
4577 i_dev++;
4578 }
4579
4580out:
4581 mutex_unlock(&lock);
4582 cb->args[0] = i_dev;
4583 cb->args[1] = i_id;
4584
4585 return skb->len;
4586}
4587
d0e312fe 4588static const struct rdma_nl_cbs cma_cb_table[RDMA_NL_RDMA_CM_NUM_OPS] = {
64401b69 4589 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats},
753f618a
NM		 4590};
4591
4be74b42
HE		 4592static int cma_init_net(struct net *net)
4593{
4594 struct cma_pernet *pernet = cma_pernet(net);
4595
4596 idr_init(&pernet->tcp_ps);
4597 idr_init(&pernet->udp_ps);
4598 idr_init(&pernet->ipoib_ps);
4599 idr_init(&pernet->ib_ps);
4600
4601 return 0;
4602}
4603
4604static void cma_exit_net(struct net *net)
4605{
4606 struct cma_pernet *pernet = cma_pernet(net);
4607
4608 idr_destroy(&pernet->tcp_ps);
4609 idr_destroy(&pernet->udp_ps);
4610 idr_destroy(&pernet->ipoib_ps);
4611 idr_destroy(&pernet->ib_ps);
4612}
4613
4614static struct pernet_operations cma_pernet_operations = {
4615 .init = cma_init_net,
4616 .exit = cma_exit_net,
4617 .id = &cma_pernet_id,
4618 .size = sizeof(struct cma_pernet),
4619};
4620
716abb1f 4621static int __init cma_init(void)
e51060f0 4622{
5d7220e8 4623 int ret;
227b60f5 4624
dee9acbb 4625 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
e51060f0
SH		 4626 if (!cma_wq)
4627 return -ENOMEM;
4628
4be74b42
HE		 4629 ret = register_pernet_subsys(&cma_pernet_operations);
4630 if (ret)
4631 goto err_wq;
4632
c1a0b23b 4633 ib_sa_register_client(&sa_client);
dd5bdff8 4634 register_netdevice_notifier(&cma_nb);
c1a0b23b 4635
e51060f0
SH		 4636 ret = ib_register_client(&cma_client);
4637 if (ret)
4638 goto err;
753f618a 4639
c9901724 4640 rdma_nl_register(RDMA_NL_RDMA_CM, cma_cb_table);
045959db 4641 cma_configfs_init();
753f618a 4642
e51060f0
SH		 4643 return 0;
4644
4645err:
dd5bdff8 4646 unregister_netdevice_notifier(&cma_nb);
c1a0b23b 4647 ib_sa_unregister_client(&sa_client);
4be74b42 4648err_wq:
e51060f0
SH		 4649 destroy_workqueue(cma_wq);
4650 return ret;
4651}
4652
716abb1f 4653static void __exit cma_cleanup(void)
e51060f0 4654{
045959db 4655 cma_configfs_exit();
c9901724 4656 rdma_nl_unregister(RDMA_NL_RDMA_CM);
e51060f0 4657 ib_unregister_client(&cma_client);
dd5bdff8 4658 unregister_netdevice_notifier(&cma_nb);
c1a0b23b 4659 ib_sa_unregister_client(&sa_client);
4be74b42 4660 unregister_pernet_subsys(&cma_pernet_operations);
e51060f0 4661 destroy_workqueue(cma_wq);
e51060f0
SH		 4662}
4663
e3bf14bd
JG		 4664MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_RDMA_CM, 1);
4665
e51060f0
SH		 4666module_init(cma_init);
4667module_exit(cma_cleanup);
Ubuntu Eoan Linux kernel mirror