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IB/addr: Pass network namespace as a parameter
[deliverable/linux.git] / drivers / infiniband / core / cma.c
CommitLineData
e51060f0
SH		 1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
a9474917
SH		 7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
e51060f0 12 *
a9474917
SH		 13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
e51060f0 16 *
a9474917
SH		 17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
e51060f0 20 *
a9474917
SH		 21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
e51060f0 25 *
a9474917
SH		 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
e51060f0
SH		 34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/idr.h>
07ebafba 42#include <linux/inetdevice.h>
5a0e3ad6 43#include <linux/slab.h>
e4dd23d7 44#include <linux/module.h>
366cddb4 45#include <net/route.h>
e51060f0
SH		 46
47#include <net/tcp.h>
1f5175ad 48#include <net/ipv6.h>
f887f2ac
HE		 49#include <net/ip_fib.h>
50#include <net/ip6_route.h>
e51060f0
SH		 51
52#include <rdma/rdma_cm.h>
53#include <rdma/rdma_cm_ib.h>
753f618a 54#include <rdma/rdma_netlink.h>
2e2d190c 55#include <rdma/ib.h>
e51060f0
SH		 56#include <rdma/ib_cache.h>
57#include <rdma/ib_cm.h>
58#include <rdma/ib_sa.h>
07ebafba 59#include <rdma/iw_cm.h>
e51060f0
SH		 60
61MODULE_AUTHOR("Sean Hefty");
62MODULE_DESCRIPTION("Generic RDMA CM Agent");
63MODULE_LICENSE("Dual BSD/GPL");
64
65#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 66#define CMA_MAX_CM_RETRIES 15
dcb3f974 67#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 68#define CMA_IBOE_PACKET_LIFETIME 18
e51060f0 69
2b1b5b60
SG		 70static const char * const cma_events[] = {
71 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
72 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
73 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
74 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
75 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
76 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
77 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
78 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
79 [RDMA_CM_EVENT_REJECTED] = "rejected",
80 [RDMA_CM_EVENT_ESTABLISHED] = "established",
81 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
82 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
83 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
84 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
85 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
86 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
87};
88
89const char *rdma_event_msg(enum rdma_cm_event_type event)
90{
91 size_t index = event;
92
93 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
94 cma_events[index] : "unrecognized event";
95}
96EXPORT_SYMBOL(rdma_event_msg);
97
e51060f0 98static void cma_add_one(struct ib_device *device);
7c1eb45a 99static void cma_remove_one(struct ib_device *device, void *client_data);
e51060f0
SH		 100
101static struct ib_client cma_client = {
102 .name = "cma",
103 .add = cma_add_one,
104 .remove = cma_remove_one
105};
106
c1a0b23b 107static struct ib_sa_client sa_client;
7a118df3 108static struct rdma_addr_client addr_client;
e51060f0
SH		 109static LIST_HEAD(dev_list);
110static LIST_HEAD(listen_any_list);
111static DEFINE_MUTEX(lock);
112static struct workqueue_struct *cma_wq;
e51060f0 113static DEFINE_IDR(tcp_ps);
628e5f6d 114static DEFINE_IDR(udp_ps);
c8f6a362 115static DEFINE_IDR(ipoib_ps);
2d2e9415 116static DEFINE_IDR(ib_ps);
e51060f0 117
aac978e1
HE		 118static struct idr *cma_idr(enum rdma_port_space ps)
119{
120 switch (ps) {
121 case RDMA_PS_TCP:
122 return &tcp_ps;
123 case RDMA_PS_UDP:
124 return &udp_ps;
125 case RDMA_PS_IPOIB:
126 return &ipoib_ps;
127 case RDMA_PS_IB:
128 return &ib_ps;
129 default:
130 return NULL;
131 }
132}
133
e51060f0
SH		 134struct cma_device {
135 struct list_head list;
136 struct ib_device *device;
e51060f0
SH		 137 struct completion comp;
138 atomic_t refcount;
139 struct list_head id_list;
140};
141
e51060f0 142struct rdma_bind_list {
aac978e1 143 enum rdma_port_space ps;
e51060f0
SH		 144 struct hlist_head owners;
145 unsigned short port;
146};
147
aac978e1
HE		 148static int cma_ps_alloc(enum rdma_port_space ps,
149 struct rdma_bind_list *bind_list, int snum)
150{
151 struct idr *idr = cma_idr(ps);
152
153 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
154}
155
156static struct rdma_bind_list *cma_ps_find(enum rdma_port_space ps, int snum)
157{
158 struct idr *idr = cma_idr(ps);
159
160 return idr_find(idr, snum);
161}
162
163static void cma_ps_remove(enum rdma_port_space ps, int snum)
164{
165 struct idr *idr = cma_idr(ps);
166
167 idr_remove(idr, snum);
168}
169
68602120
SH		 170enum {
171 CMA_OPTION_AFONLY,
172};
173
e51060f0
SH		 174/*
175 * Device removal can occur at anytime, so we need extra handling to
176 * serialize notifying the user of device removal with other callbacks.
177 * We do this by disabling removal notification while a callback is in process,
178 * and reporting it after the callback completes.
179 */
180struct rdma_id_private {
181 struct rdma_cm_id id;
182
183 struct rdma_bind_list *bind_list;
184 struct hlist_node node;
d02d1f53
SH		 185 struct list_head list; /* listen_any_list or cma_device.list */
186 struct list_head listen_list; /* per device listens */
e51060f0 187 struct cma_device *cma_dev;
c8f6a362 188 struct list_head mc_list;
e51060f0 189
d02d1f53 190 int internal_id;
550e5ca7 191 enum rdma_cm_state state;
e51060f0 192 spinlock_t lock;
c5483388
SH		 193 struct mutex qp_mutex;
194
e51060f0
SH		 195 struct completion comp;
196 atomic_t refcount;
de910bd9 197 struct mutex handler_mutex;
e51060f0
SH		 198
199 int backlog;
200 int timeout_ms;
201 struct ib_sa_query *query;
202 int query_id;
203 union {
204 struct ib_cm_id *ib;
07ebafba 205 struct iw_cm_id *iw;
e51060f0
SH		 206 } cm_id;
207
208 u32 seq_num;
c8f6a362 209 u32 qkey;
e51060f0 210 u32 qp_num;
83e9502d 211 pid_t owner;
68602120 212 u32 options;
e51060f0 213 u8 srq;
a81c994d 214 u8 tos;
a9bb7912 215 u8 reuseaddr;
5b0ec991 216 u8 afonly;
e51060f0
SH		 217};
218
c8f6a362
SH		 219struct cma_multicast {
220 struct rdma_id_private *id_priv;
221 union {
222 struct ib_sa_multicast *ib;
223 } multicast;
224 struct list_head list;
225 void *context;
3f446754 226 struct sockaddr_storage addr;
3c86aa70 227 struct kref mcref;
c8f6a362
SH		 228};
229
e51060f0
SH		 230struct cma_work {
231 struct work_struct work;
232 struct rdma_id_private *id;
550e5ca7
NM		 233 enum rdma_cm_state old_state;
234 enum rdma_cm_state new_state;
e51060f0
SH		 235 struct rdma_cm_event event;
236};
237
dd5bdff8
OG		 238struct cma_ndev_work {
239 struct work_struct work;
240 struct rdma_id_private *id;
241 struct rdma_cm_event event;
242};
243
3c86aa70
EC		 244struct iboe_mcast_work {
245 struct work_struct work;
246 struct rdma_id_private *id;
247 struct cma_multicast *mc;
248};
249
e51060f0
SH		 250union cma_ip_addr {
251 struct in6_addr ip6;
252 struct {
1b90c137
AV		 253 __be32 pad[3];
254 __be32 addr;
e51060f0
SH		 255 } ip4;
256};
257
258struct cma_hdr {
259 u8 cma_version;
260 u8 ip_version; /* IP version: 7:4 */
1b90c137 261 __be16 port;
e51060f0
SH		 262 union cma_ip_addr src_addr;
263 union cma_ip_addr dst_addr;
264};
265
e51060f0 266#define CMA_VERSION 0x00
e51060f0 267
4c21b5bc
HE		 268struct cma_req_info {
269 struct ib_device *device;
270 int port;
271 union ib_gid local_gid;
272 __be64 service_id;
273 u16 pkey;
274 bool has_gid:1;
275};
276
550e5ca7 277static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
e51060f0
SH		 278{
279 unsigned long flags;
280 int ret;
281
282 spin_lock_irqsave(&id_priv->lock, flags);
283 ret = (id_priv->state == comp);
284 spin_unlock_irqrestore(&id_priv->lock, flags);
285 return ret;
286}
287
288static int cma_comp_exch(struct rdma_id_private *id_priv,
550e5ca7 289 enum rdma_cm_state comp, enum rdma_cm_state exch)
e51060f0
SH		 290{
291 unsigned long flags;
292 int ret;
293
294 spin_lock_irqsave(&id_priv->lock, flags);
295 if ((ret = (id_priv->state == comp)))
296 id_priv->state = exch;
297 spin_unlock_irqrestore(&id_priv->lock, flags);
298 return ret;
299}
300
550e5ca7
NM		 301static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
302 enum rdma_cm_state exch)
e51060f0
SH		 303{
304 unsigned long flags;
550e5ca7 305 enum rdma_cm_state old;
e51060f0
SH		 306
307 spin_lock_irqsave(&id_priv->lock, flags);
308 old = id_priv->state;
309 id_priv->state = exch;
310 spin_unlock_irqrestore(&id_priv->lock, flags);
311 return old;
312}
313
4c21b5bc 314static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
e51060f0
SH		 315{
316 return hdr->ip_version >> 4;
317}
318
319static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
320{
321 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
322}
323
e51060f0
SH		 324static void cma_attach_to_dev(struct rdma_id_private *id_priv,
325 struct cma_device *cma_dev)
326{
327 atomic_inc(&cma_dev->refcount);
328 id_priv->cma_dev = cma_dev;
329 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 330 id_priv->id.route.addr.dev_addr.transport =
331 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0
SH		 332 list_add_tail(&id_priv->list, &cma_dev->id_list);
333}
334
335static inline void cma_deref_dev(struct cma_device *cma_dev)
336{
337 if (atomic_dec_and_test(&cma_dev->refcount))
338 complete(&cma_dev->comp);
339}
340
3c86aa70
EC		 341static inline void release_mc(struct kref *kref)
342{
343 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
344
345 kfree(mc->multicast.ib);
346 kfree(mc);
347}
348
a396d43a 349static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 350{
a396d43a 351 mutex_lock(&lock);
e51060f0
SH		 352 list_del(&id_priv->list);
353 cma_deref_dev(id_priv->cma_dev);
354 id_priv->cma_dev = NULL;
a396d43a 355 mutex_unlock(&lock);
e51060f0
SH		 356}
357
f4753834
SH		 358static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
359{
360 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
361}
362
363static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
364{
365 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
366}
367
368static inline unsigned short cma_family(struct rdma_id_private *id_priv)
369{
370 return id_priv->id.route.addr.src_addr.ss_family;
371}
372
5c438135 373static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
c8f6a362
SH		 374{
375 struct ib_sa_mcmember_rec rec;
376 int ret = 0;
377
5c438135
SH		 378 if (id_priv->qkey) {
379 if (qkey && id_priv->qkey != qkey)
380 return -EINVAL;
d2ca39f2 381 return 0;
5c438135
SH		 382 }
383
384 if (qkey) {
385 id_priv->qkey = qkey;
386 return 0;
387 }
d2ca39f2
YE		 388
389 switch (id_priv->id.ps) {
c8f6a362 390 case RDMA_PS_UDP:
5c438135 391 case RDMA_PS_IB:
d2ca39f2 392 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 393 break;
394 case RDMA_PS_IPOIB:
d2ca39f2
YE		 395 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
396 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
397 id_priv->id.port_num, &rec.mgid,
398 &rec);
399 if (!ret)
400 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 401 break;
402 default:
403 break;
404 }
405 return ret;
406}
407
680f920a
SH		 408static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
409{
410 dev_addr->dev_type = ARPHRD_INFINIBAND;
411 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
412 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
413}
414
415static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
416{
417 int ret;
418
419 if (addr->sa_family != AF_IB) {
dd5f03be 420 ret = rdma_translate_ip(addr, dev_addr, NULL);
680f920a
SH		 421 } else {
422 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
423 ret = 0;
424 }
425
426 return ret;
427}
428
7c11147d 429static inline int cma_validate_port(struct ib_device *device, u8 port,
abae1b71
MB		 430 union ib_gid *gid, int dev_type,
431 int bound_if_index)
7c11147d 432{
7c11147d 433 int ret = -ENODEV;
abae1b71 434 struct net_device *ndev = NULL;
7c11147d
MW		 435
436 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
437 return ret;
438
439 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
440 return ret;
441
abae1b71
MB		 442 if (dev_type == ARPHRD_ETHER)
443 ndev = dev_get_by_index(&init_net, bound_if_index);
444
445 ret = ib_find_cached_gid_by_port(device, gid, port, ndev, NULL);
446
447 if (ndev)
448 dev_put(ndev);
7c11147d
MW		 449
450 return ret;
451}
452
be9130cc
DL		 453static int cma_acquire_dev(struct rdma_id_private *id_priv,
454 struct rdma_id_private *listen_id_priv)
e51060f0 455{
c8f6a362 456 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 457 struct cma_device *cma_dev;
7c11147d 458 union ib_gid gid, iboe_gid, *gidp;
e51060f0 459 int ret = -ENODEV;
7c11147d 460 u8 port;
e51060f0 461
7c11147d 462 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
2efdd6a0
MS		 463 id_priv->id.ps == RDMA_PS_IPOIB)
464 return -EINVAL;
465
a396d43a 466 mutex_lock(&lock);
7b85627b
MS		 467 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
468 &iboe_gid);
469
3c86aa70
EC		 470 memcpy(&gid, dev_addr->src_dev_addr +
471 rdma_addr_gid_offset(dev_addr), sizeof gid);
7c11147d
MW		 472
473 if (listen_id_priv) {
be9130cc
DL		 474 cma_dev = listen_id_priv->cma_dev;
475 port = listen_id_priv->id.port_num;
5d9fb044 476 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d 477 &iboe_gid : &gid;
be9130cc 478
7c11147d 479 ret = cma_validate_port(cma_dev->device, port, gidp,
abae1b71
MB		 480 dev_addr->dev_type,
481 dev_addr->bound_dev_if);
7c11147d
MW		 482 if (!ret) {
483 id_priv->id.port_num = port;
be9130cc
DL		 484 goto out;
485 }
486 }
7c11147d 487
e51060f0 488 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70 489 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
be9130cc
DL		 490 if (listen_id_priv &&
491 listen_id_priv->cma_dev == cma_dev &&
492 listen_id_priv->id.port_num == port)
493 continue;
7c11147d 494
5d9fb044 495 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d
MW		 496 &iboe_gid : &gid;
497
498 ret = cma_validate_port(cma_dev->device, port, gidp,
abae1b71
MB		 499 dev_addr->dev_type,
500 dev_addr->bound_dev_if);
7c11147d
MW		 501 if (!ret) {
502 id_priv->id.port_num = port;
503 goto out;
3c86aa70 504 }
e51060f0
SH		 505 }
506 }
3c86aa70
EC		 507
508out:
509 if (!ret)
510 cma_attach_to_dev(id_priv, cma_dev);
511
a396d43a 512 mutex_unlock(&lock);
e51060f0
SH		 513 return ret;
514}
515
f17df3b0
SH		 516/*
517 * Select the source IB device and address to reach the destination IB address.
518 */
519static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
520{
521 struct cma_device *cma_dev, *cur_dev;
522 struct sockaddr_ib *addr;
523 union ib_gid gid, sgid, *dgid;
524 u16 pkey, index;
8fb488d7 525 u8 p;
f17df3b0
SH		 526 int i;
527
528 cma_dev = NULL;
529 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
530 dgid = (union ib_gid *) &addr->sib_addr;
531 pkey = ntohs(addr->sib_pkey);
532
533 list_for_each_entry(cur_dev, &dev_list, list) {
f17df3b0 534 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
30a74ef4 535 if (!rdma_cap_af_ib(cur_dev->device, p))
fef60902
MW		 536 continue;
537
f17df3b0
SH		 538 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
539 continue;
540
55ee3ab2
MB		 541 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
542 &gid, NULL);
543 i++) {
f17df3b0
SH		 544 if (!memcmp(&gid, dgid, sizeof(gid))) {
545 cma_dev = cur_dev;
546 sgid = gid;
8fb488d7 547 id_priv->id.port_num = p;
f17df3b0
SH		 548 goto found;
549 }
550
551 if (!cma_dev && (gid.global.subnet_prefix ==
552 dgid->global.subnet_prefix)) {
553 cma_dev = cur_dev;
554 sgid = gid;
8fb488d7 555 id_priv->id.port_num = p;
f17df3b0
SH		 556 }
557 }
558 }
559 }
560
561 if (!cma_dev)
562 return -ENODEV;
563
564found:
565 cma_attach_to_dev(id_priv, cma_dev);
f17df3b0
SH		 566 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
567 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
568 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
569 return 0;
570}
571
e51060f0
SH		 572static void cma_deref_id(struct rdma_id_private *id_priv)
573{
574 if (atomic_dec_and_test(&id_priv->refcount))
575 complete(&id_priv->comp);
576}
577
de910bd9 578static int cma_disable_callback(struct rdma_id_private *id_priv,
550e5ca7 579 enum rdma_cm_state state)
8aa08602 580{
de910bd9
OG		 581 mutex_lock(&id_priv->handler_mutex);
582 if (id_priv->state != state) {
583 mutex_unlock(&id_priv->handler_mutex);
584 return -EINVAL;
585 }
586 return 0;
e51060f0
SH		 587}
588
589struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
b26f9b99
SH		 590 void *context, enum rdma_port_space ps,
591 enum ib_qp_type qp_type)
e51060f0
SH		 592{
593 struct rdma_id_private *id_priv;
594
595 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
596 if (!id_priv)
597 return ERR_PTR(-ENOMEM);
598
83e9502d 599 id_priv->owner = task_pid_nr(current);
550e5ca7 600 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 601 id_priv->id.context = context;
602 id_priv->id.event_handler = event_handler;
603 id_priv->id.ps = ps;
b26f9b99 604 id_priv->id.qp_type = qp_type;
e51060f0 605 spin_lock_init(&id_priv->lock);
c5483388 606 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 607 init_completion(&id_priv->comp);
608 atomic_set(&id_priv->refcount, 1);
de910bd9 609 mutex_init(&id_priv->handler_mutex);
e51060f0 610 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 611 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0 612 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
565edd1d 613 id_priv->id.route.addr.dev_addr.net = &init_net;
e51060f0
SH		 614
615 return &id_priv->id;
616}
617EXPORT_SYMBOL(rdma_create_id);
618
c8f6a362 619static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 620{
621 struct ib_qp_attr qp_attr;
c8f6a362 622 int qp_attr_mask, ret;
e51060f0 623
c8f6a362
SH		 624 qp_attr.qp_state = IB_QPS_INIT;
625 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 626 if (ret)
627 return ret;
628
c8f6a362
SH		 629 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
630 if (ret)
631 return ret;
632
633 qp_attr.qp_state = IB_QPS_RTR;
634 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
635 if (ret)
636 return ret;
637
638 qp_attr.qp_state = IB_QPS_RTS;
639 qp_attr.sq_psn = 0;
640 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
641
642 return ret;
e51060f0
SH		 643}
644
c8f6a362 645static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 646{
647 struct ib_qp_attr qp_attr;
c8f6a362 648 int qp_attr_mask, ret;
07ebafba
TT		 649
650 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 651 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
652 if (ret)
653 return ret;
07ebafba 654
c8f6a362 655 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 656}
657
e51060f0
SH		 658int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
659 struct ib_qp_init_attr *qp_init_attr)
660{
661 struct rdma_id_private *id_priv;
662 struct ib_qp *qp;
663 int ret;
664
665 id_priv = container_of(id, struct rdma_id_private, id);
666 if (id->device != pd->device)
667 return -EINVAL;
668
669 qp = ib_create_qp(pd, qp_init_attr);
670 if (IS_ERR(qp))
671 return PTR_ERR(qp);
672
b26f9b99 673 if (id->qp_type == IB_QPT_UD)
c8f6a362
SH		 674 ret = cma_init_ud_qp(id_priv, qp);
675 else
676 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 677 if (ret)
678 goto err;
679
680 id->qp = qp;
681 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 682 id_priv->srq = (qp->srq != NULL);
683 return 0;
684err:
685 ib_destroy_qp(qp);
686 return ret;
687}
688EXPORT_SYMBOL(rdma_create_qp);
689
690void rdma_destroy_qp(struct rdma_cm_id *id)
691{
c5483388
SH		 692 struct rdma_id_private *id_priv;
693
694 id_priv = container_of(id, struct rdma_id_private, id);
695 mutex_lock(&id_priv->qp_mutex);
696 ib_destroy_qp(id_priv->id.qp);
697 id_priv->id.qp = NULL;
698 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 699}
700EXPORT_SYMBOL(rdma_destroy_qp);
701
5851bb89
SH		 702static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
703 struct rdma_conn_param *conn_param)
e51060f0
SH		 704{
705 struct ib_qp_attr qp_attr;
706 int qp_attr_mask, ret;
dd5f03be 707 union ib_gid sgid;
e51060f0 708
c5483388
SH		 709 mutex_lock(&id_priv->qp_mutex);
710 if (!id_priv->id.qp) {
711 ret = 0;
712 goto out;
713 }
e51060f0
SH		 714
715 /* Need to update QP attributes from default values. */
716 qp_attr.qp_state = IB_QPS_INIT;
c5483388 717 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 718 if (ret)
c5483388 719 goto out;
e51060f0 720
c5483388 721 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 722 if (ret)
c5483388 723 goto out;
e51060f0
SH		 724
725 qp_attr.qp_state = IB_QPS_RTR;
c5483388 726 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 727 if (ret)
c5483388 728 goto out;
e51060f0 729
dd5f03be 730 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
55ee3ab2 731 qp_attr.ah_attr.grh.sgid_index, &sgid, NULL);
dd5f03be
MB		 732 if (ret)
733 goto out;
734
fef60902
MW		 735 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
736
5851bb89
SH		 737 if (conn_param)
738 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 739 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
740out:
741 mutex_unlock(&id_priv->qp_mutex);
742 return ret;
e51060f0
SH		 743}
744
5851bb89
SH		 745static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
746 struct rdma_conn_param *conn_param)
e51060f0
SH		 747{
748 struct ib_qp_attr qp_attr;
749 int qp_attr_mask, ret;
750
c5483388
SH		 751 mutex_lock(&id_priv->qp_mutex);
752 if (!id_priv->id.qp) {
753 ret = 0;
754 goto out;
755 }
e51060f0
SH		 756
757 qp_attr.qp_state = IB_QPS_RTS;
c5483388 758 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 759 if (ret)
c5483388 760 goto out;
e51060f0 761
5851bb89
SH		 762 if (conn_param)
763 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 764 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
765out:
766 mutex_unlock(&id_priv->qp_mutex);
767 return ret;
e51060f0
SH		 768}
769
c5483388 770static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 771{
772 struct ib_qp_attr qp_attr;
c5483388 773 int ret;
e51060f0 774
c5483388
SH		 775 mutex_lock(&id_priv->qp_mutex);
776 if (!id_priv->id.qp) {
777 ret = 0;
778 goto out;
779 }
e51060f0
SH		 780
781 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 782 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
783out:
784 mutex_unlock(&id_priv->qp_mutex);
785 return ret;
e51060f0
SH		 786}
787
c8f6a362
SH		 788static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
789 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
790{
791 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
792 int ret;
3c86aa70
EC		 793 u16 pkey;
794
227128fc 795 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
3c86aa70 796 pkey = 0xffff;
fef60902
MW		 797 else
798 pkey = ib_addr_get_pkey(dev_addr);
c8f6a362
SH		 799
800 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 801 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 802 if (ret)
803 return ret;
804
805 qp_attr->port_num = id_priv->id.port_num;
806 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
807
b26f9b99 808 if (id_priv->id.qp_type == IB_QPT_UD) {
5c438135 809 ret = cma_set_qkey(id_priv, 0);
d2ca39f2
YE		 810 if (ret)
811 return ret;
812
c8f6a362
SH		 813 qp_attr->qkey = id_priv->qkey;
814 *qp_attr_mask |= IB_QP_QKEY;
815 } else {
816 qp_attr->qp_access_flags = 0;
817 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
818 }
819 return 0;
820}
821
e51060f0
SH		 822int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
823 int *qp_attr_mask)
824{
825 struct rdma_id_private *id_priv;
c8f6a362 826 int ret = 0;
e51060f0
SH		 827
828 id_priv = container_of(id, struct rdma_id_private, id);
72219cea 829 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 830 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 831 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
832 else
833 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
834 qp_attr_mask);
dd5f03be 835
e51060f0
SH		 836 if (qp_attr->qp_state == IB_QPS_RTR)
837 qp_attr->rq_psn = id_priv->seq_num;
04215330 838 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
c8f6a362 839 if (!id_priv->cm_id.iw) {
8f076531 840 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 841 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
842 } else
843 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
844 qp_attr_mask);
21655afc 845 } else
e51060f0 846 ret = -ENOSYS;
e51060f0
SH		 847
848 return ret;
849}
850EXPORT_SYMBOL(rdma_init_qp_attr);
851
852static inline int cma_zero_addr(struct sockaddr *addr)
853{
2e2d190c
SH		 854 switch (addr->sa_family) {
855 case AF_INET:
856 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
857 case AF_INET6:
858 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
859 case AF_IB:
860 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
861 default:
862 return 0;
e51060f0
SH		 863 }
864}
865
866static inline int cma_loopback_addr(struct sockaddr *addr)
867{
2e2d190c
SH		 868 switch (addr->sa_family) {
869 case AF_INET:
870 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
871 case AF_INET6:
872 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
873 case AF_IB:
874 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
875 default:
876 return 0;
877 }
e51060f0
SH		 878}
879
880static inline int cma_any_addr(struct sockaddr *addr)
881{
882 return cma_zero_addr(addr) || cma_loopback_addr(addr);
883}
884
43b752da
HS		 885static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
886{
887 if (src->sa_family != dst->sa_family)
888 return -1;
889
890 switch (src->sa_family) {
891 case AF_INET:
892 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
893 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2e2d190c 894 case AF_INET6:
43b752da
HS		 895 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
896 &((struct sockaddr_in6 *) dst)->sin6_addr);
2e2d190c
SH		 897 default:
898 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
899 &((struct sockaddr_ib *) dst)->sib_addr);
43b752da
HS		 900 }
901}
902
58afdcb7 903static __be16 cma_port(struct sockaddr *addr)
628e5f6d 904{
58afdcb7
SH		 905 struct sockaddr_ib *sib;
906
907 switch (addr->sa_family) {
908 case AF_INET:
628e5f6d 909 return ((struct sockaddr_in *) addr)->sin_port;
58afdcb7 910 case AF_INET6:
628e5f6d 911 return ((struct sockaddr_in6 *) addr)->sin6_port;
58afdcb7
SH		 912 case AF_IB:
913 sib = (struct sockaddr_ib *) addr;
914 return htons((u16) (be64_to_cpu(sib->sib_sid) &
915 be64_to_cpu(sib->sib_sid_mask)));
916 default:
917 return 0;
918 }
628e5f6d
SH		 919}
920
e51060f0
SH		 921static inline int cma_any_port(struct sockaddr *addr)
922{
628e5f6d 923 return !cma_port(addr);
e51060f0
SH		 924}
925
0c505f70
HE		 926static void cma_save_ib_info(struct sockaddr *src_addr,
927 struct sockaddr *dst_addr,
928 struct rdma_cm_id *listen_id,
fbaa1a6d 929 struct ib_sa_path_rec *path)
e51060f0 930{
fbaa1a6d
SH		 931 struct sockaddr_ib *listen_ib, *ib;
932
933 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
0c505f70
HE		 934 if (src_addr) {
935 ib = (struct sockaddr_ib *)src_addr;
936 ib->sib_family = AF_IB;
937 if (path) {
938 ib->sib_pkey = path->pkey;
939 ib->sib_flowinfo = path->flow_label;
940 memcpy(&ib->sib_addr, &path->sgid, 16);
941 ib->sib_sid = path->service_id;
942 ib->sib_scope_id = 0;
943 } else {
944 ib->sib_pkey = listen_ib->sib_pkey;
945 ib->sib_flowinfo = listen_ib->sib_flowinfo;
946 ib->sib_addr = listen_ib->sib_addr;
947 ib->sib_sid = listen_ib->sib_sid;
948 ib->sib_scope_id = listen_ib->sib_scope_id;
949 }
950 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
c07678bb 951 }
0c505f70
HE		 952 if (dst_addr) {
953 ib = (struct sockaddr_ib *)dst_addr;
954 ib->sib_family = AF_IB;
955 if (path) {
956 ib->sib_pkey = path->pkey;
957 ib->sib_flowinfo = path->flow_label;
958 memcpy(&ib->sib_addr, &path->dgid, 16);
959 }
c07678bb 960 }
fbaa1a6d 961}
e51060f0 962
0c505f70
HE		 963static void cma_save_ip4_info(struct sockaddr *src_addr,
964 struct sockaddr *dst_addr,
965 struct cma_hdr *hdr,
966 __be16 local_port)
fbaa1a6d 967{
28521440 968 struct sockaddr_in *ip4;
e51060f0 969
0c505f70
HE		 970 if (src_addr) {
971 ip4 = (struct sockaddr_in *)src_addr;
972 ip4->sin_family = AF_INET;
973 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
974 ip4->sin_port = local_port;
975 }
fbaa1a6d 976
0c505f70
HE		 977 if (dst_addr) {
978 ip4 = (struct sockaddr_in *)dst_addr;
979 ip4->sin_family = AF_INET;
980 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
981 ip4->sin_port = hdr->port;
982 }
e51060f0
SH		 983}
984
0c505f70
HE		 985static void cma_save_ip6_info(struct sockaddr *src_addr,
986 struct sockaddr *dst_addr,
987 struct cma_hdr *hdr,
988 __be16 local_port)
e51060f0 989{
28521440 990 struct sockaddr_in6 *ip6;
e51060f0 991
0c505f70
HE		 992 if (src_addr) {
993 ip6 = (struct sockaddr_in6 *)src_addr;
994 ip6->sin6_family = AF_INET6;
995 ip6->sin6_addr = hdr->dst_addr.ip6;
996 ip6->sin6_port = local_port;
997 }
fbaa1a6d 998
0c505f70
HE		 999 if (dst_addr) {
1000 ip6 = (struct sockaddr_in6 *)dst_addr;
1001 ip6->sin6_family = AF_INET6;
1002 ip6->sin6_addr = hdr->src_addr.ip6;
1003 ip6->sin6_port = hdr->port;
1004 }
fbaa1a6d
SH		 1005}
1006
0c505f70 1007static u16 cma_port_from_service_id(__be64 service_id)
fbaa1a6d 1008{
0c505f70
HE		 1009 return (u16)be64_to_cpu(service_id);
1010}
fbaa1a6d 1011
0c505f70
HE		 1012static int cma_save_ip_info(struct sockaddr *src_addr,
1013 struct sockaddr *dst_addr,
1014 struct ib_cm_event *ib_event,
1015 __be64 service_id)
1016{
1017 struct cma_hdr *hdr;
1018 __be16 port;
fbaa1a6d
SH		 1019
1020 hdr = ib_event->private_data;
1021 if (hdr->cma_version != CMA_VERSION)
1022 return -EINVAL;
1023
0c505f70
HE		 1024 port = htons(cma_port_from_service_id(service_id));
1025
fbaa1a6d 1026 switch (cma_get_ip_ver(hdr)) {
e51060f0 1027 case 4:
0c505f70 1028 cma_save_ip4_info(src_addr, dst_addr, hdr, port);
e51060f0
SH		 1029 break;
1030 case 6:
0c505f70 1031 cma_save_ip6_info(src_addr, dst_addr, hdr, port);
e51060f0
SH		 1032 break;
1033 default:
4c21b5bc 1034 return -EAFNOSUPPORT;
e51060f0 1035 }
0c505f70 1036
fbaa1a6d 1037 return 0;
e51060f0
SH		 1038}
1039
0c505f70
HE		 1040static int cma_save_net_info(struct sockaddr *src_addr,
1041 struct sockaddr *dst_addr,
1042 struct rdma_cm_id *listen_id,
1043 struct ib_cm_event *ib_event,
1044 sa_family_t sa_family, __be64 service_id)
1045{
1046 if (sa_family == AF_IB) {
1047 if (ib_event->event == IB_CM_REQ_RECEIVED)
1048 cma_save_ib_info(src_addr, dst_addr, listen_id,
1049 ib_event->param.req_rcvd.primary_path);
1050 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1051 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1052 return 0;
1053 }
1054
1055 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1056}
1057
4c21b5bc
HE		 1058static int cma_save_req_info(const struct ib_cm_event *ib_event,
1059 struct cma_req_info *req)
1060{
1061 const struct ib_cm_req_event_param *req_param =
1062 &ib_event->param.req_rcvd;
1063 const struct ib_cm_sidr_req_event_param *sidr_param =
1064 &ib_event->param.sidr_req_rcvd;
1065
1066 switch (ib_event->event) {
1067 case IB_CM_REQ_RECEIVED:
1068 req->device = req_param->listen_id->device;
1069 req->port = req_param->port;
1070 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1071 sizeof(req->local_gid));
1072 req->has_gid = true;
1073 req->service_id = req_param->primary_path->service_id;
ab3964ad 1074 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
4c21b5bc
HE		 1075 break;
1076 case IB_CM_SIDR_REQ_RECEIVED:
1077 req->device = sidr_param->listen_id->device;
1078 req->port = sidr_param->port;
1079 req->has_gid = false;
1080 req->service_id = sidr_param->service_id;
ab3964ad 1081 req->pkey = sidr_param->pkey;
4c21b5bc
HE		 1082 break;
1083 default:
1084 return -EINVAL;
1085 }
1086
1087 return 0;
1088}
1089
f887f2ac
HE		 1090static bool validate_ipv4_net_dev(struct net_device *net_dev,
1091 const struct sockaddr_in *dst_addr,
1092 const struct sockaddr_in *src_addr)
1093{
1094 __be32 daddr = dst_addr->sin_addr.s_addr,
1095 saddr = src_addr->sin_addr.s_addr;
1096 struct fib_result res;
1097 struct flowi4 fl4;
1098 int err;
1099 bool ret;
1100
1101 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1102 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1103 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1104 ipv4_is_loopback(saddr))
1105 return false;
1106
1107 memset(&fl4, 0, sizeof(fl4));
1108 fl4.flowi4_iif = net_dev->ifindex;
1109 fl4.daddr = daddr;
1110 fl4.saddr = saddr;
1111
1112 rcu_read_lock();
1113 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1114 if (err)
1115 return false;
1116
1117 ret = FIB_RES_DEV(res) == net_dev;
1118 rcu_read_unlock();
1119
1120 return ret;
1121}
1122
1123static bool validate_ipv6_net_dev(struct net_device *net_dev,
1124 const struct sockaddr_in6 *dst_addr,
1125 const struct sockaddr_in6 *src_addr)
1126{
1127#if IS_ENABLED(CONFIG_IPV6)
1128 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1129 IPV6_ADDR_LINKLOCAL;
1130 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1131 &src_addr->sin6_addr, net_dev->ifindex,
1132 strict);
1133 bool ret;
1134
1135 if (!rt)
1136 return false;
1137
1138 ret = rt->rt6i_idev->dev == net_dev;
1139 ip6_rt_put(rt);
1140
1141 return ret;
1142#else
1143 return false;
1144#endif
1145}
1146
1147static bool validate_net_dev(struct net_device *net_dev,
1148 const struct sockaddr *daddr,
1149 const struct sockaddr *saddr)
1150{
1151 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1152 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1153 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1154 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1155
1156 switch (daddr->sa_family) {
1157 case AF_INET:
1158 return saddr->sa_family == AF_INET &&
1159 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1160
1161 case AF_INET6:
1162 return saddr->sa_family == AF_INET6 &&
1163 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1164
1165 default:
1166 return false;
1167 }
1168}
1169
4c21b5bc
HE		 1170static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1171 const struct cma_req_info *req)
1172{
f887f2ac
HE		 1173 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1174 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1175 *src_addr = (struct sockaddr *)&src_addr_storage;
4c21b5bc
HE		 1176 struct net_device *net_dev;
1177 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1178 int err;
1179
f887f2ac
HE		 1180 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1181 req->service_id);
4c21b5bc
HE		 1182 if (err)
1183 return ERR_PTR(err);
1184
1185 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1186 gid, listen_addr);
1187 if (!net_dev)
1188 return ERR_PTR(-ENODEV);
1189
f887f2ac
HE		 1190 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1191 dev_put(net_dev);
1192 return ERR_PTR(-EHOSTUNREACH);
1193 }
1194
4c21b5bc
HE		 1195 return net_dev;
1196}
1197
1198static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1199{
1200 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1201}
1202
1203static bool cma_match_private_data(struct rdma_id_private *id_priv,
1204 const struct cma_hdr *hdr)
1205{
1206 struct sockaddr *addr = cma_src_addr(id_priv);
1207 __be32 ip4_addr;
1208 struct in6_addr ip6_addr;
1209
1210 if (cma_any_addr(addr) && !id_priv->afonly)
1211 return true;
1212
1213 switch (addr->sa_family) {
1214 case AF_INET:
1215 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1216 if (cma_get_ip_ver(hdr) != 4)
1217 return false;
1218 if (!cma_any_addr(addr) &&
1219 hdr->dst_addr.ip4.addr != ip4_addr)
1220 return false;
1221 break;
1222 case AF_INET6:
1223 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1224 if (cma_get_ip_ver(hdr) != 6)
1225 return false;
1226 if (!cma_any_addr(addr) &&
1227 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1228 return false;
1229 break;
1230 case AF_IB:
1231 return true;
1232 default:
1233 return false;
1234 }
1235
1236 return true;
1237}
1238
b8cab5da
HE		 1239static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1240{
1241 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1242 enum rdma_transport_type transport =
1243 rdma_node_get_transport(device->node_type);
1244
1245 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1246}
1247
1248static bool cma_protocol_roce(const struct rdma_cm_id *id)
1249{
1250 struct ib_device *device = id->device;
1251 const int port_num = id->port_num ?: rdma_start_port(device);
1252
1253 return cma_protocol_roce_dev_port(device, port_num);
1254}
1255
4c21b5bc
HE		 1256static bool cma_match_net_dev(const struct rdma_id_private *id_priv,
1257 const struct net_device *net_dev)
1258{
1259 const struct rdma_addr *addr = &id_priv->id.route.addr;
1260
1261 if (!net_dev)
b8cab5da
HE		 1262 /* This request is an AF_IB request or a RoCE request */
1263 return addr->src_addr.ss_family == AF_IB ||
1264 cma_protocol_roce(&id_priv->id);
4c21b5bc
HE		 1265
1266 return !addr->dev_addr.bound_dev_if ||
1267 (net_eq(dev_net(net_dev), &init_net) &&
1268 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1269}
1270
1271static struct rdma_id_private *cma_find_listener(
1272 const struct rdma_bind_list *bind_list,
1273 const struct ib_cm_id *cm_id,
1274 const struct ib_cm_event *ib_event,
1275 const struct cma_req_info *req,
1276 const struct net_device *net_dev)
1277{
1278 struct rdma_id_private *id_priv, *id_priv_dev;
1279
1280 if (!bind_list)
1281 return ERR_PTR(-EINVAL);
1282
1283 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1284 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1285 if (id_priv->id.device == cm_id->device &&
1286 cma_match_net_dev(id_priv, net_dev))
1287 return id_priv;
1288 list_for_each_entry(id_priv_dev,
1289 &id_priv->listen_list,
1290 listen_list) {
1291 if (id_priv_dev->id.device == cm_id->device &&
1292 cma_match_net_dev(id_priv_dev, net_dev))
1293 return id_priv_dev;
1294 }
1295 }
1296 }
1297
1298 return ERR_PTR(-EINVAL);
1299}
1300
1301static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
0b3ca768
HE		 1302 struct ib_cm_event *ib_event,
1303 struct net_device **net_dev)
4c21b5bc
HE		 1304{
1305 struct cma_req_info req;
1306 struct rdma_bind_list *bind_list;
1307 struct rdma_id_private *id_priv;
4c21b5bc
HE		 1308 int err;
1309
1310 err = cma_save_req_info(ib_event, &req);
1311 if (err)
1312 return ERR_PTR(err);
1313
0b3ca768
HE		 1314 *net_dev = cma_get_net_dev(ib_event, &req);
1315 if (IS_ERR(*net_dev)) {
1316 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
4c21b5bc 1317 /* Assuming the protocol is AF_IB */
0b3ca768 1318 *net_dev = NULL;
b8cab5da
HE		 1319 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1320 /* TODO find the net dev matching the request parameters
1321 * through the RoCE GID table */
1322 *net_dev = NULL;
4c21b5bc 1323 } else {
0b3ca768 1324 return ERR_CAST(*net_dev);
4c21b5bc
HE		 1325 }
1326 }
1327
1328 bind_list = cma_ps_find(rdma_ps_from_service_id(req.service_id),
1329 cma_port_from_service_id(req.service_id));
0b3ca768 1330 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
b3b51f9f 1331 if (IS_ERR(id_priv) && *net_dev) {
be688195
HE		 1332 dev_put(*net_dev);
1333 *net_dev = NULL;
1334 }
4c21b5bc
HE		 1335
1336 return id_priv;
1337}
1338
e8160e15 1339static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
e51060f0 1340{
e8160e15 1341 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
e51060f0
SH		 1342}
1343
e51060f0
SH		 1344static void cma_cancel_route(struct rdma_id_private *id_priv)
1345{
fe53ba2f 1346 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
e51060f0
SH		 1347 if (id_priv->query)
1348 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
e51060f0
SH		 1349 }
1350}
1351
e51060f0
SH		 1352static void cma_cancel_listens(struct rdma_id_private *id_priv)
1353{
1354 struct rdma_id_private *dev_id_priv;
1355
d02d1f53
SH		 1356 /*
1357 * Remove from listen_any_list to prevent added devices from spawning
1358 * additional listen requests.
1359 */
e51060f0
SH		 1360 mutex_lock(&lock);
1361 list_del(&id_priv->list);
1362
1363 while (!list_empty(&id_priv->listen_list)) {
1364 dev_id_priv = list_entry(id_priv->listen_list.next,
1365 struct rdma_id_private, listen_list);
d02d1f53
SH		 1366 /* sync with device removal to avoid duplicate destruction */
1367 list_del_init(&dev_id_priv->list);
1368 list_del(&dev_id_priv->listen_list);
1369 mutex_unlock(&lock);
1370
1371 rdma_destroy_id(&dev_id_priv->id);
1372 mutex_lock(&lock);
e51060f0
SH		 1373 }
1374 mutex_unlock(&lock);
1375}
1376
1377static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 1378 enum rdma_cm_state state)
e51060f0
SH		 1379{
1380 switch (state) {
550e5ca7 1381 case RDMA_CM_ADDR_QUERY:
e51060f0
SH		 1382 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1383 break;
550e5ca7 1384 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 1385 cma_cancel_route(id_priv);
1386 break;
550e5ca7 1387 case RDMA_CM_LISTEN:
f4753834 1388 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
e51060f0
SH		 1389 cma_cancel_listens(id_priv);
1390 break;
1391 default:
1392 break;
1393 }
1394}
1395
1396static void cma_release_port(struct rdma_id_private *id_priv)
1397{
1398 struct rdma_bind_list *bind_list = id_priv->bind_list;
1399
1400 if (!bind_list)
1401 return;
1402
1403 mutex_lock(&lock);
1404 hlist_del(&id_priv->node);
1405 if (hlist_empty(&bind_list->owners)) {
aac978e1 1406 cma_ps_remove(bind_list->ps, bind_list->port);
e51060f0
SH		 1407 kfree(bind_list);
1408 }
1409 mutex_unlock(&lock);
1410}
1411
c8f6a362
SH		 1412static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1413{
1414 struct cma_multicast *mc;
1415
1416 while (!list_empty(&id_priv->mc_list)) {
1417 mc = container_of(id_priv->mc_list.next,
1418 struct cma_multicast, list);
1419 list_del(&mc->list);
a31ad3b0 1420 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
5c9a5282 1421 id_priv->id.port_num)) {
3c86aa70
EC		 1422 ib_sa_free_multicast(mc->multicast.ib);
1423 kfree(mc);
5c9a5282 1424 } else
3c86aa70 1425 kref_put(&mc->mcref, release_mc);
c8f6a362
SH		 1426 }
1427}
1428
e51060f0
SH		 1429void rdma_destroy_id(struct rdma_cm_id *id)
1430{
1431 struct rdma_id_private *id_priv;
550e5ca7 1432 enum rdma_cm_state state;
e51060f0
SH		 1433
1434 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1435 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1436 cma_cancel_operation(id_priv, state);
1437
a396d43a
SH		 1438 /*
1439 * Wait for any active callback to finish. New callbacks will find
1440 * the id_priv state set to destroying and abort.
1441 */
1442 mutex_lock(&id_priv->handler_mutex);
1443 mutex_unlock(&id_priv->handler_mutex);
1444
e51060f0 1445 if (id_priv->cma_dev) {
72219cea 1446 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
0c9361fc 1447 if (id_priv->cm_id.ib)
e51060f0 1448 ib_destroy_cm_id(id_priv->cm_id.ib);
04215330 1449 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
0c9361fc 1450 if (id_priv->cm_id.iw)
07ebafba 1451 iw_destroy_cm_id(id_priv->cm_id.iw);
e51060f0 1452 }
c8f6a362 1453 cma_leave_mc_groups(id_priv);
a396d43a 1454 cma_release_dev(id_priv);
e51060f0
SH		 1455 }
1456
1457 cma_release_port(id_priv);
1458 cma_deref_id(id_priv);
1459 wait_for_completion(&id_priv->comp);
1460
d02d1f53
SH		 1461 if (id_priv->internal_id)
1462 cma_deref_id(id_priv->id.context);
1463
e51060f0
SH		 1464 kfree(id_priv->id.route.path_rec);
1465 kfree(id_priv);
1466}
1467EXPORT_SYMBOL(rdma_destroy_id);
1468
1469static int cma_rep_recv(struct rdma_id_private *id_priv)
1470{
1471 int ret;
1472
5851bb89 1473 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 1474 if (ret)
1475 goto reject;
1476
5851bb89 1477 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 1478 if (ret)
1479 goto reject;
1480
1481 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1482 if (ret)
1483 goto reject;
1484
1485 return 0;
1486reject:
c5483388 1487 cma_modify_qp_err(id_priv);
e51060f0
SH		 1488 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1489 NULL, 0, NULL, 0);
1490 return ret;
1491}
1492
a1b1b61f
SH		 1493static void cma_set_rep_event_data(struct rdma_cm_event *event,
1494 struct ib_cm_rep_event_param *rep_data,
1495 void *private_data)
1496{
1497 event->param.conn.private_data = private_data;
1498 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1499 event->param.conn.responder_resources = rep_data->responder_resources;
1500 event->param.conn.initiator_depth = rep_data->initiator_depth;
1501 event->param.conn.flow_control = rep_data->flow_control;
1502 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1503 event->param.conn.srq = rep_data->srq;
1504 event->param.conn.qp_num = rep_data->remote_qpn;
1505}
1506
e51060f0
SH		 1507static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1508{
1509 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 1510 struct rdma_cm_event event;
1511 int ret = 0;
e51060f0 1512
38ca83a5 1513 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1514 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
38ca83a5 1515 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1516 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
8aa08602 1517 return 0;
e51060f0 1518
a1b1b61f 1519 memset(&event, 0, sizeof event);
e51060f0
SH		 1520 switch (ib_event->event) {
1521 case IB_CM_REQ_ERROR:
1522 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1523 event.event = RDMA_CM_EVENT_UNREACHABLE;
1524 event.status = -ETIMEDOUT;
e51060f0
SH		 1525 break;
1526 case IB_CM_REP_RECEIVED:
01602f11 1527 if (id_priv->id.qp) {
a1b1b61f
SH		 1528 event.status = cma_rep_recv(id_priv);
1529 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1530 RDMA_CM_EVENT_ESTABLISHED;
01602f11 1531 } else {
a1b1b61f 1532 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
01602f11 1533 }
a1b1b61f
SH		 1534 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1535 ib_event->private_data);
e51060f0
SH		 1536 break;
1537 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1538 case IB_CM_USER_ESTABLISHED:
1539 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1540 break;
1541 case IB_CM_DREQ_ERROR:
a1b1b61f 1542 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1543 case IB_CM_DREQ_RECEIVED:
1544 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 1545 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1546 RDMA_CM_DISCONNECT))
e51060f0 1547 goto out;
a1b1b61f 1548 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1549 break;
1550 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1551 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1552 break;
e51060f0
SH		 1553 case IB_CM_MRA_RECEIVED:
1554 /* ignore event */
1555 goto out;
1556 case IB_CM_REJ_RECEIVED:
c5483388 1557 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1558 event.status = ib_event->param.rej_rcvd.reason;
1559 event.event = RDMA_CM_EVENT_REJECTED;
1560 event.param.conn.private_data = ib_event->private_data;
1561 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1562 break;
1563 default:
468f2239 1564 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1565 ib_event->event);
1566 goto out;
1567 }
1568
a1b1b61f 1569 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1570 if (ret) {
1571 /* Destroy the CM ID by returning a non-zero value. */
1572 id_priv->cm_id.ib = NULL;
550e5ca7 1573 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1574 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1575 rdma_destroy_id(&id_priv->id);
1576 return ret;
1577 }
1578out:
de910bd9 1579 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1580 return ret;
1581}
1582
628e5f6d 1583static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
0b3ca768
HE		 1584 struct ib_cm_event *ib_event,
1585 struct net_device *net_dev)
e51060f0
SH		 1586{
1587 struct rdma_id_private *id_priv;
1588 struct rdma_cm_id *id;
1589 struct rdma_route *rt;
0c505f70
HE		 1590 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1591 const __be64 service_id =
1592 ib_event->param.req_rcvd.primary_path->service_id;
64c5e613 1593 int ret;
e51060f0
SH		 1594
1595 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1596 listen_id->ps, ib_event->param.req_rcvd.qp_type);
e51060f0 1597 if (IS_ERR(id))
0c9361fc 1598 return NULL;
3f168d2b 1599
f4753834 1600 id_priv = container_of(id, struct rdma_id_private, id);
0c505f70
HE		 1601 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1602 (struct sockaddr *)&id->route.addr.dst_addr,
1603 listen_id, ib_event, ss_family, service_id))
fbaa1a6d 1604 goto err;
e51060f0
SH		 1605
1606 rt = &id->route;
1607 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1608 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1609 GFP_KERNEL);
e51060f0 1610 if (!rt->path_rec)
0c9361fc 1611 goto err;
e51060f0 1612
e51060f0
SH		 1613 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1614 if (rt->num_paths == 2)
1615 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1616
0b3ca768
HE		 1617 if (net_dev) {
1618 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
6f8372b6 1619 if (ret)
0c9361fc 1620 goto err;
0b3ca768 1621 } else {
b8cab5da
HE		 1622 if (!cma_protocol_roce(listen_id) &&
1623 cma_any_addr(cma_src_addr(id_priv))) {
1624 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1625 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1626 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1627 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1628 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1629 if (ret)
1630 goto err;
1631 }
6f8372b6
SH		 1632 }
1633 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0 1634
550e5ca7 1635 id_priv->state = RDMA_CM_CONNECT;
e51060f0 1636 return id_priv;
3f168d2b 1637
3f168d2b 1638err:
0c9361fc 1639 rdma_destroy_id(id);
e51060f0
SH		 1640 return NULL;
1641}
1642
628e5f6d 1643static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
0b3ca768
HE		 1644 struct ib_cm_event *ib_event,
1645 struct net_device *net_dev)
628e5f6d
SH		 1646{
1647 struct rdma_id_private *id_priv;
1648 struct rdma_cm_id *id;
0c505f70 1649 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
628e5f6d
SH		 1650 int ret;
1651
1652 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1653 listen_id->ps, IB_QPT_UD);
628e5f6d
SH		 1654 if (IS_ERR(id))
1655 return NULL;
1656
f4753834 1657 id_priv = container_of(id, struct rdma_id_private, id);
0c505f70
HE		 1658 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1659 (struct sockaddr *)&id->route.addr.dst_addr,
1660 listen_id, ib_event, ss_family,
1661 ib_event->param.sidr_req_rcvd.service_id))
628e5f6d
SH		 1662 goto err;
1663
0b3ca768
HE		 1664 if (net_dev) {
1665 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
6f8372b6
SH		 1666 if (ret)
1667 goto err;
0b3ca768 1668 } else {
b8cab5da
HE		 1669 if (!cma_any_addr(cma_src_addr(id_priv))) {
1670 ret = cma_translate_addr(cma_src_addr(id_priv),
1671 &id->route.addr.dev_addr);
1672 if (ret)
1673 goto err;
1674 }
6f8372b6 1675 }
628e5f6d 1676
550e5ca7 1677 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 1678 return id_priv;
1679err:
1680 rdma_destroy_id(id);
1681 return NULL;
1682}
1683
a1b1b61f
SH		 1684static void cma_set_req_event_data(struct rdma_cm_event *event,
1685 struct ib_cm_req_event_param *req_data,
1686 void *private_data, int offset)
1687{
1688 event->param.conn.private_data = private_data + offset;
1689 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1690 event->param.conn.responder_resources = req_data->responder_resources;
1691 event->param.conn.initiator_depth = req_data->initiator_depth;
1692 event->param.conn.flow_control = req_data->flow_control;
1693 event->param.conn.retry_count = req_data->retry_count;
1694 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1695 event->param.conn.srq = req_data->srq;
1696 event->param.conn.qp_num = req_data->remote_qpn;
1697}
1698
9595480c
HS		 1699static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1700{
4dd81e89 1701 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 1702 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1703 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1704 (id->qp_type == IB_QPT_UD)) ||
1705 (!id->qp_type));
1706}
1707
e51060f0
SH		 1708static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1709{
1710 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1711 struct rdma_cm_event event;
0b3ca768 1712 struct net_device *net_dev;
e51060f0
SH		 1713 int offset, ret;
1714
0b3ca768 1715 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
4c21b5bc
HE		 1716 if (IS_ERR(listen_id))
1717 return PTR_ERR(listen_id);
1718
0b3ca768
HE		 1719 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1720 ret = -EINVAL;
1721 goto net_dev_put;
1722 }
9595480c 1723
0b3ca768
HE		 1724 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) {
1725 ret = -ECONNABORTED;
1726 goto net_dev_put;
1727 }
e51060f0 1728
628e5f6d 1729 memset(&event, 0, sizeof event);
e8160e15 1730 offset = cma_user_data_offset(listen_id);
628e5f6d 1731 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 1732 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
0b3ca768 1733 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 1734 event.param.ud.private_data = ib_event->private_data + offset;
1735 event.param.ud.private_data_len =
1736 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1737 } else {
0b3ca768 1738 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 1739 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1740 ib_event->private_data, offset);
1741 }
e51060f0
SH		 1742 if (!conn_id) {
1743 ret = -ENOMEM;
b6cec8aa 1744 goto err1;
e51060f0
SH		 1745 }
1746
de910bd9 1747 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
be9130cc 1748 ret = cma_acquire_dev(conn_id, listen_id);
a1a733f6 1749 if (ret)
b6cec8aa 1750 goto err2;
e51060f0
SH		 1751
1752 conn_id->cm_id.ib = cm_id;
1753 cm_id->context = conn_id;
1754 cm_id->cm_handler = cma_ib_handler;
1755
25ae21a1
SH		 1756 /*
1757 * Protect against the user destroying conn_id from another thread
1758 * until we're done accessing it.
1759 */
1760 atomic_inc(&conn_id->refcount);
a1b1b61f 1761 ret = conn_id->id.event_handler(&conn_id->id, &event);
b6cec8aa
SH		 1762 if (ret)
1763 goto err3;
b6cec8aa
SH		 1764 /*
1765 * Acquire mutex to prevent user executing rdma_destroy_id()
1766 * while we're accessing the cm_id.
1767 */
1768 mutex_lock(&lock);
dd5f03be
MB		 1769 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1770 (conn_id->id.qp_type != IB_QPT_UD))
b6cec8aa
SH		 1771 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1772 mutex_unlock(&lock);
1773 mutex_unlock(&conn_id->handler_mutex);
1774 mutex_unlock(&listen_id->handler_mutex);
25ae21a1 1775 cma_deref_id(conn_id);
0b3ca768
HE		 1776 if (net_dev)
1777 dev_put(net_dev);
b6cec8aa 1778 return 0;
a1a733f6 1779
b6cec8aa
SH		 1780err3:
1781 cma_deref_id(conn_id);
a1a733f6
KK		 1782 /* Destroy the CM ID by returning a non-zero value. */
1783 conn_id->cm_id.ib = NULL;
b6cec8aa 1784err2:
550e5ca7 1785 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1786 mutex_unlock(&conn_id->handler_mutex);
b6cec8aa 1787err1:
de910bd9 1788 mutex_unlock(&listen_id->handler_mutex);
b6cec8aa
SH		 1789 if (conn_id)
1790 rdma_destroy_id(&conn_id->id);
0b3ca768
HE		 1791
1792net_dev_put:
1793 if (net_dev)
1794 dev_put(net_dev);
1795
e51060f0
SH		 1796 return ret;
1797}
1798
cf53936f 1799__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
e51060f0 1800{
496ce3ce
SH		 1801 if (addr->sa_family == AF_IB)
1802 return ((struct sockaddr_ib *) addr)->sib_sid;
1803
cf53936f 1804 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0 1805}
cf53936f 1806EXPORT_SYMBOL(rdma_get_service_id);
e51060f0 1807
07ebafba
TT		 1808static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1809{
1810 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1811 struct rdma_cm_event event;
07ebafba 1812 int ret = 0;
24d44a39
SW		 1813 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1814 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba 1815
550e5ca7 1816 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
be65f086 1817 return 0;
07ebafba 1818
be65f086 1819 memset(&event, 0, sizeof event);
07ebafba
TT		 1820 switch (iw_event->event) {
1821 case IW_CM_EVENT_CLOSE:
a1b1b61f 1822 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1823 break;
1824 case IW_CM_EVENT_CONNECT_REPLY:
24d44a39
SW		 1825 memcpy(cma_src_addr(id_priv), laddr,
1826 rdma_addr_size(laddr));
1827 memcpy(cma_dst_addr(id_priv), raddr,
1828 rdma_addr_size(raddr));
881a045f
SW		 1829 switch (iw_event->status) {
1830 case 0:
a1b1b61f 1831 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1832 event.param.conn.initiator_depth = iw_event->ird;
1833 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 1834 break;
1835 case -ECONNRESET:
1836 case -ECONNREFUSED:
1837 event.event = RDMA_CM_EVENT_REJECTED;
1838 break;
1839 case -ETIMEDOUT:
1840 event.event = RDMA_CM_EVENT_UNREACHABLE;
1841 break;
1842 default:
1843 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1844 break;
1845 }
07ebafba
TT		 1846 break;
1847 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1848 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1849 event.param.conn.initiator_depth = iw_event->ird;
1850 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 1851 break;
1852 default:
1853 BUG_ON(1);
1854 }
1855
a1b1b61f
SH		 1856 event.status = iw_event->status;
1857 event.param.conn.private_data = iw_event->private_data;
1858 event.param.conn.private_data_len = iw_event->private_data_len;
1859 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1860 if (ret) {
1861 /* Destroy the CM ID by returning a non-zero value. */
1862 id_priv->cm_id.iw = NULL;
550e5ca7 1863 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1864 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1865 rdma_destroy_id(&id_priv->id);
1866 return ret;
1867 }
1868
de910bd9 1869 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1870 return ret;
1871}
1872
1873static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1874 struct iw_cm_event *iw_event)
1875{
1876 struct rdma_cm_id *new_cm_id;
1877 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1878 struct rdma_cm_event event;
07ebafba 1879 int ret;
8d8293cf 1880 struct ib_device_attr attr;
24d44a39
SW		 1881 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1882 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba
TT		 1883
1884 listen_id = cm_id->context;
550e5ca7 1885 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1886 return -ECONNABORTED;
07ebafba
TT		 1887
1888 /* Create a new RDMA id for the new IW CM ID */
1889 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1890 listen_id->id.context,
b26f9b99 1891 RDMA_PS_TCP, IB_QPT_RC);
10f32065 1892 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1893 ret = -ENOMEM;
1894 goto out;
1895 }
1896 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1897 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 1898 conn_id->state = RDMA_CM_CONNECT;
07ebafba 1899
dd5f03be 1900 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
07ebafba 1901 if (ret) {
de910bd9 1902 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1903 rdma_destroy_id(new_cm_id);
1904 goto out;
1905 }
1906
be9130cc 1907 ret = cma_acquire_dev(conn_id, listen_id);
07ebafba 1908 if (ret) {
de910bd9 1909 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1910 rdma_destroy_id(new_cm_id);
1911 goto out;
1912 }
1913
1914 conn_id->cm_id.iw = cm_id;
1915 cm_id->context = conn_id;
1916 cm_id->cm_handler = cma_iw_handler;
1917
24d44a39
SW		 1918 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
1919 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
07ebafba 1920
8d8293cf
SW		 1921 ret = ib_query_device(conn_id->id.device, &attr);
1922 if (ret) {
de910bd9 1923 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1924 rdma_destroy_id(new_cm_id);
1925 goto out;
1926 }
1927
a1b1b61f
SH		 1928 memset(&event, 0, sizeof event);
1929 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1930 event.param.conn.private_data = iw_event->private_data;
1931 event.param.conn.private_data_len = iw_event->private_data_len;
3ebeebc3
KS		 1932 event.param.conn.initiator_depth = iw_event->ird;
1933 event.param.conn.responder_resources = iw_event->ord;
25ae21a1
SH		 1934
1935 /*
1936 * Protect against the user destroying conn_id from another thread
1937 * until we're done accessing it.
1938 */
1939 atomic_inc(&conn_id->refcount);
a1b1b61f 1940 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1941 if (ret) {
1942 /* User wants to destroy the CM ID */
1943 conn_id->cm_id.iw = NULL;
550e5ca7 1944 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1945 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1946 cma_deref_id(conn_id);
07ebafba 1947 rdma_destroy_id(&conn_id->id);
de910bd9 1948 goto out;
07ebafba
TT		 1949 }
1950
de910bd9 1951 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1952 cma_deref_id(conn_id);
de910bd9 1953
07ebafba 1954out:
de910bd9 1955 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1956 return ret;
1957}
1958
e51060f0
SH		 1959static int cma_ib_listen(struct rdma_id_private *id_priv)
1960{
e51060f0 1961 struct sockaddr *addr;
0c9361fc 1962 struct ib_cm_id *id;
e51060f0 1963 __be64 svc_id;
e51060f0 1964
51efe394
HE		 1965 addr = cma_src_addr(id_priv);
1966 svc_id = rdma_get_service_id(&id_priv->id, addr);
1967 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
0c9361fc
JM		 1968 if (IS_ERR(id))
1969 return PTR_ERR(id);
0c9361fc 1970 id_priv->cm_id.ib = id;
e51060f0 1971
51efe394 1972 return 0;
e51060f0
SH		 1973}
1974
07ebafba
TT		 1975static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1976{
1977 int ret;
0c9361fc
JM		 1978 struct iw_cm_id *id;
1979
1980 id = iw_create_cm_id(id_priv->id.device,
1981 iw_conn_req_handler,
1982 id_priv);
1983 if (IS_ERR(id))
1984 return PTR_ERR(id);
07ebafba 1985
68cdba06 1986 id->tos = id_priv->tos;
0c9361fc 1987 id_priv->cm_id.iw = id;
07ebafba 1988
24d44a39
SW		 1989 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
1990 rdma_addr_size(cma_src_addr(id_priv)));
07ebafba
TT		 1991
1992 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1993
1994 if (ret) {
1995 iw_destroy_cm_id(id_priv->cm_id.iw);
1996 id_priv->cm_id.iw = NULL;
1997 }
1998
1999 return ret;
2000}
2001
e51060f0
SH		 2002static int cma_listen_handler(struct rdma_cm_id *id,
2003 struct rdma_cm_event *event)
2004{
2005 struct rdma_id_private *id_priv = id->context;
2006
2007 id->context = id_priv->id.context;
2008 id->event_handler = id_priv->id.event_handler;
2009 return id_priv->id.event_handler(id, event);
2010}
2011
2012static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2013 struct cma_device *cma_dev)
2014{
2015 struct rdma_id_private *dev_id_priv;
2016 struct rdma_cm_id *id;
2017 int ret;
2018
72219cea 2019 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
94d0c939
SH		 2020 return;
2021
b26f9b99
SH		 2022 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
2023 id_priv->id.qp_type);
e51060f0
SH		 2024 if (IS_ERR(id))
2025 return;
2026
2027 dev_id_priv = container_of(id, struct rdma_id_private, id);
2028
550e5ca7 2029 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
f4753834
SH		 2030 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2031 rdma_addr_size(cma_src_addr(id_priv)));
e51060f0
SH		 2032
2033 cma_attach_to_dev(dev_id_priv, cma_dev);
2034 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 2035 atomic_inc(&id_priv->refcount);
2036 dev_id_priv->internal_id = 1;
5b0ec991 2037 dev_id_priv->afonly = id_priv->afonly;
e51060f0
SH		 2038
2039 ret = rdma_listen(id, id_priv->backlog);
2040 if (ret)
d02d1f53 2041 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 2042 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 2043}
2044
2045static void cma_listen_on_all(struct rdma_id_private *id_priv)
2046{
2047 struct cma_device *cma_dev;
2048
2049 mutex_lock(&lock);
2050 list_add_tail(&id_priv->list, &listen_any_list);
2051 list_for_each_entry(cma_dev, &dev_list, list)
2052 cma_listen_on_dev(id_priv, cma_dev);
2053 mutex_unlock(&lock);
2054}
2055
a81c994d
SH		 2056void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2057{
2058 struct rdma_id_private *id_priv;
2059
2060 id_priv = container_of(id, struct rdma_id_private, id);
2061 id_priv->tos = (u8) tos;
2062}
2063EXPORT_SYMBOL(rdma_set_service_type);
2064
e51060f0
SH		 2065static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2066 void *context)
2067{
2068 struct cma_work *work = context;
2069 struct rdma_route *route;
2070
2071 route = &work->id->id.route;
2072
2073 if (!status) {
2074 route->num_paths = 1;
2075 *route->path_rec = *path_rec;
2076 } else {
550e5ca7
NM		 2077 work->old_state = RDMA_CM_ROUTE_QUERY;
2078 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0 2079 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 2080 work->event.status = status;
e51060f0
SH		 2081 }
2082
2083 queue_work(cma_wq, &work->work);
2084}
2085
2086static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2087 struct cma_work *work)
2088{
f4753834 2089 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 2090 struct ib_sa_path_rec path_rec;
a81c994d
SH		 2091 ib_sa_comp_mask comp_mask;
2092 struct sockaddr_in6 *sin6;
f68194ca 2093 struct sockaddr_ib *sib;
e51060f0
SH		 2094
2095 memset(&path_rec, 0, sizeof path_rec);
f4753834
SH		 2096 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2097 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2098 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
e51060f0 2099 path_rec.numb_path = 1;
962063e6 2100 path_rec.reversible = 1;
cf53936f 2101 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
a81c994d
SH		 2102
2103 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2104 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2105 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2106
f68194ca
SH		 2107 switch (cma_family(id_priv)) {
2108 case AF_INET:
a81c994d
SH		 2109 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2110 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
f68194ca
SH		 2111 break;
2112 case AF_INET6:
f4753834 2113 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
a81c994d
SH		 2114 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2115 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
f68194ca
SH		 2116 break;
2117 case AF_IB:
2118 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2119 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2120 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2121 break;
a81c994d 2122 }
e51060f0 2123
c1a0b23b 2124 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 2125 id_priv->id.port_num, &path_rec,
2126 comp_mask, timeout_ms,
2127 GFP_KERNEL, cma_query_handler,
2128 work, &id_priv->query);
e51060f0
SH		 2129
2130 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2131}
2132
c4028958 2133static void cma_work_handler(struct work_struct *_work)
e51060f0 2134{
c4028958 2135 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 2136 struct rdma_id_private *id_priv = work->id;
2137 int destroy = 0;
2138
de910bd9 2139 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 2140 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2141 goto out;
2142
2143 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 2144 cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 2145 destroy = 1;
2146 }
2147out:
de910bd9 2148 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2149 cma_deref_id(id_priv);
2150 if (destroy)
2151 rdma_destroy_id(&id_priv->id);
2152 kfree(work);
2153}
2154
dd5bdff8
OG		 2155static void cma_ndev_work_handler(struct work_struct *_work)
2156{
2157 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2158 struct rdma_id_private *id_priv = work->id;
2159 int destroy = 0;
2160
2161 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2162 if (id_priv->state == RDMA_CM_DESTROYING ||
2163 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
dd5bdff8
OG		 2164 goto out;
2165
2166 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 2167 cma_exch(id_priv, RDMA_CM_DESTROYING);
dd5bdff8
OG		 2168 destroy = 1;
2169 }
2170
2171out:
2172 mutex_unlock(&id_priv->handler_mutex);
2173 cma_deref_id(id_priv);
2174 if (destroy)
2175 rdma_destroy_id(&id_priv->id);
2176 kfree(work);
2177}
2178
e51060f0
SH		 2179static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2180{
2181 struct rdma_route *route = &id_priv->id.route;
2182 struct cma_work *work;
2183 int ret;
2184
2185 work = kzalloc(sizeof *work, GFP_KERNEL);
2186 if (!work)
2187 return -ENOMEM;
2188
2189 work->id = id_priv;
c4028958 2190 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2191 work->old_state = RDMA_CM_ROUTE_QUERY;
2192 work->new_state = RDMA_CM_ROUTE_RESOLVED;
e51060f0
SH		 2193 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2194
2195 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2196 if (!route->path_rec) {
2197 ret = -ENOMEM;
2198 goto err1;
2199 }
2200
2201 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2202 if (ret)
2203 goto err2;
2204
2205 return 0;
2206err2:
2207 kfree(route->path_rec);
2208 route->path_rec = NULL;
2209err1:
2210 kfree(work);
2211 return ret;
2212}
2213
2214int rdma_set_ib_paths(struct rdma_cm_id *id,
2215 struct ib_sa_path_rec *path_rec, int num_paths)
2216{
2217 struct rdma_id_private *id_priv;
2218 int ret;
2219
2220 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 2221 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2222 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 2223 return -EINVAL;
2224
9893e742
JL		 2225 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2226 GFP_KERNEL);
e51060f0
SH		 2227 if (!id->route.path_rec) {
2228 ret = -ENOMEM;
2229 goto err;
2230 }
2231
ae2d9293 2232 id->route.num_paths = num_paths;
e51060f0
SH		 2233 return 0;
2234err:
550e5ca7 2235 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2236 return ret;
2237}
2238EXPORT_SYMBOL(rdma_set_ib_paths);
2239
07ebafba
TT		 2240static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2241{
2242 struct cma_work *work;
2243
2244 work = kzalloc(sizeof *work, GFP_KERNEL);
2245 if (!work)
2246 return -ENOMEM;
2247
2248 work->id = id_priv;
c4028958 2249 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2250 work->old_state = RDMA_CM_ROUTE_QUERY;
2251 work->new_state = RDMA_CM_ROUTE_RESOLVED;
07ebafba
TT		 2252 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2253 queue_work(cma_wq, &work->work);
2254 return 0;
2255}
2256
eb072c4b
EP		 2257static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2258{
2259 int prio;
2260 struct net_device *dev;
2261
2262 prio = rt_tos2priority(tos);
2263 dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
2264 vlan_dev_real_dev(ndev) : ndev;
2265
2266 if (dev->num_tc)
2267 return netdev_get_prio_tc_map(dev, prio);
2268
2269#if IS_ENABLED(CONFIG_VLAN_8021Q)
2270 if (ndev->priv_flags & IFF_802_1Q_VLAN)
2271 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2272 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2273#endif
2274 return 0;
2275}
2276
3c86aa70
EC		 2277static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2278{
2279 struct rdma_route *route = &id_priv->id.route;
2280 struct rdma_addr *addr = &route->addr;
2281 struct cma_work *work;
2282 int ret;
3c86aa70 2283 struct net_device *ndev = NULL;
dd5f03be 2284
3c86aa70 2285
3c86aa70
EC		 2286 work = kzalloc(sizeof *work, GFP_KERNEL);
2287 if (!work)
2288 return -ENOMEM;
2289
2290 work->id = id_priv;
2291 INIT_WORK(&work->work, cma_work_handler);
2292
2293 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2294 if (!route->path_rec) {
2295 ret = -ENOMEM;
2296 goto err1;
2297 }
2298
2299 route->num_paths = 1;
2300
abae1b71 2301 if (addr->dev_addr.bound_dev_if) {
3c86aa70 2302 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
abae1b71
MB		 2303 route->path_rec->net = &init_net;
2304 route->path_rec->ifindex = addr->dev_addr.bound_dev_if;
2305 }
3c86aa70
EC		 2306 if (!ndev) {
2307 ret = -ENODEV;
2308 goto err2;
2309 }
2310
dd5f03be 2311 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
af7bd463 2312
7b85627b
MS		 2313 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2314 &route->path_rec->sgid);
2315 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2316 &route->path_rec->dgid);
af7bd463
EC		 2317
2318 route->path_rec->hop_limit = 1;
2319 route->path_rec->reversible = 1;
2320 route->path_rec->pkey = cpu_to_be16(0xffff);
2321 route->path_rec->mtu_selector = IB_SA_EQ;
eb072c4b 2322 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
3c86aa70
EC		 2323 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2324 route->path_rec->rate_selector = IB_SA_EQ;
2325 route->path_rec->rate = iboe_get_rate(ndev);
2326 dev_put(ndev);
2327 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2328 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2329 if (!route->path_rec->mtu) {
2330 ret = -EINVAL;
2331 goto err2;
2332 }
2333
550e5ca7
NM		 2334 work->old_state = RDMA_CM_ROUTE_QUERY;
2335 work->new_state = RDMA_CM_ROUTE_RESOLVED;
3c86aa70
EC		 2336 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2337 work->event.status = 0;
2338
2339 queue_work(cma_wq, &work->work);
2340
2341 return 0;
2342
2343err2:
2344 kfree(route->path_rec);
2345 route->path_rec = NULL;
2346err1:
2347 kfree(work);
2348 return ret;
2349}
2350
e51060f0
SH		 2351int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2352{
2353 struct rdma_id_private *id_priv;
2354 int ret;
2355
2356 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2357 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 2358 return -EINVAL;
2359
2360 atomic_inc(&id_priv->refcount);
fe53ba2f 2361 if (rdma_cap_ib_sa(id->device, id->port_num))
c72f2189 2362 ret = cma_resolve_ib_route(id_priv, timeout_ms);
5d9fb044 2363 else if (rdma_protocol_roce(id->device, id->port_num))
c72f2189
MW		 2364 ret = cma_resolve_iboe_route(id_priv);
2365 else if (rdma_protocol_iwarp(id->device, id->port_num))
07ebafba 2366 ret = cma_resolve_iw_route(id_priv, timeout_ms);
c72f2189 2367 else
e51060f0 2368 ret = -ENOSYS;
c72f2189 2369
e51060f0
SH		 2370 if (ret)
2371 goto err;
2372
2373 return 0;
2374err:
550e5ca7 2375 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2376 cma_deref_id(id_priv);
2377 return ret;
2378}
2379EXPORT_SYMBOL(rdma_resolve_route);
2380
6a3e362d
SH		 2381static void cma_set_loopback(struct sockaddr *addr)
2382{
2383 switch (addr->sa_family) {
2384 case AF_INET:
2385 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2386 break;
2387 case AF_INET6:
2388 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2389 0, 0, 0, htonl(1));
2390 break;
2391 default:
2392 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2393 0, 0, 0, htonl(1));
2394 break;
2395 }
2396}
2397
e51060f0
SH		 2398static int cma_bind_loopback(struct rdma_id_private *id_priv)
2399{
b0569e40 2400 struct cma_device *cma_dev, *cur_dev;
e51060f0 2401 struct ib_port_attr port_attr;
f0ee3404 2402 union ib_gid gid;
e51060f0
SH		 2403 u16 pkey;
2404 int ret;
2405 u8 p;
2406
b0569e40 2407 cma_dev = NULL;
e51060f0 2408 mutex_lock(&lock);
b0569e40
SH		 2409 list_for_each_entry(cur_dev, &dev_list, list) {
2410 if (cma_family(id_priv) == AF_IB &&
72219cea 2411 !rdma_cap_ib_cm(cur_dev->device, 1))
b0569e40
SH		 2412 continue;
2413
2414 if (!cma_dev)
2415 cma_dev = cur_dev;
2416
2417 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2418 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2419 port_attr.state == IB_PORT_ACTIVE) {
2420 cma_dev = cur_dev;
2421 goto port_found;
2422 }
2423 }
2424 }
2425
2426 if (!cma_dev) {
e82153b5
KK		 2427 ret = -ENODEV;
2428 goto out;
2429 }
e51060f0 2430
e82153b5 2431 p = 1;
e51060f0
SH		 2432
2433port_found:
55ee3ab2 2434 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
e51060f0
SH		 2435 if (ret)
2436 goto out;
2437
2438 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2439 if (ret)
2440 goto out;
2441
6f8372b6 2442 id_priv->id.route.addr.dev_addr.dev_type =
21655afc 2443 (rdma_protocol_ib(cma_dev->device, p)) ?
6f8372b6
SH		 2444 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2445
2446 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 2447 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2448 id_priv->id.port_num = p;
2449 cma_attach_to_dev(id_priv, cma_dev);
f4753834 2450 cma_set_loopback(cma_src_addr(id_priv));
e51060f0
SH		 2451out:
2452 mutex_unlock(&lock);
2453 return ret;
2454}
2455
2456static void addr_handler(int status, struct sockaddr *src_addr,
2457 struct rdma_dev_addr *dev_addr, void *context)
2458{
2459 struct rdma_id_private *id_priv = context;
a1b1b61f 2460 struct rdma_cm_event event;
e51060f0 2461
a1b1b61f 2462 memset(&event, 0, sizeof event);
de910bd9 2463 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2464 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2465 RDMA_CM_ADDR_RESOLVED))
61a73c70 2466 goto out;
61a73c70 2467
7b85627b 2468 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
61a73c70 2469 if (!status && !id_priv->cma_dev)
be9130cc 2470 status = cma_acquire_dev(id_priv, NULL);
e51060f0
SH		 2471
2472 if (status) {
550e5ca7
NM		 2473 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2474 RDMA_CM_ADDR_BOUND))
e51060f0 2475 goto out;
a1b1b61f
SH		 2476 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2477 event.status = status;
7b85627b 2478 } else
a1b1b61f 2479 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0 2480
a1b1b61f 2481 if (id_priv->id.event_handler(&id_priv->id, &event)) {
550e5ca7 2482 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2483 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2484 cma_deref_id(id_priv);
2485 rdma_destroy_id(&id_priv->id);
2486 return;
2487 }
2488out:
de910bd9 2489 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2490 cma_deref_id(id_priv);
2491}
2492
2493static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2494{
2495 struct cma_work *work;
f0ee3404 2496 union ib_gid gid;
e51060f0
SH		 2497 int ret;
2498
2499 work = kzalloc(sizeof *work, GFP_KERNEL);
2500 if (!work)
2501 return -ENOMEM;
2502
2503 if (!id_priv->cma_dev) {
2504 ret = cma_bind_loopback(id_priv);
2505 if (ret)
2506 goto err;
2507 }
2508
6f8372b6
SH		 2509 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2510 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2511
e51060f0 2512 work->id = id_priv;
c4028958 2513 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2514 work->old_state = RDMA_CM_ADDR_QUERY;
2515 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0
SH		 2516 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2517 queue_work(cma_wq, &work->work);
2518 return 0;
2519err:
2520 kfree(work);
2521 return ret;
2522}
2523
f17df3b0
SH		 2524static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2525{
2526 struct cma_work *work;
2527 int ret;
2528
2529 work = kzalloc(sizeof *work, GFP_KERNEL);
2530 if (!work)
2531 return -ENOMEM;
2532
2533 if (!id_priv->cma_dev) {
2534 ret = cma_resolve_ib_dev(id_priv);
2535 if (ret)
2536 goto err;
2537 }
2538
2539 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2540 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2541
2542 work->id = id_priv;
2543 INIT_WORK(&work->work, cma_work_handler);
2544 work->old_state = RDMA_CM_ADDR_QUERY;
2545 work->new_state = RDMA_CM_ADDR_RESOLVED;
2546 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2547 queue_work(cma_wq, &work->work);
2548 return 0;
2549err:
2550 kfree(work);
2551 return ret;
2552}
2553
e51060f0
SH		 2554static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2555 struct sockaddr *dst_addr)
2556{
d14714df
SH		 2557 if (!src_addr || !src_addr->sa_family) {
2558 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
f17df3b0
SH		 2559 src_addr->sa_family = dst_addr->sa_family;
2560 if (dst_addr->sa_family == AF_INET6) {
6c26a771
SB		 2561 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2562 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2563 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2564 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2565 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
f17df3b0
SH		 2566 } else if (dst_addr->sa_family == AF_IB) {
2567 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2568 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
d14714df
SH		 2569 }
2570 }
2571 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2572}
2573
2574int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2575 struct sockaddr *dst_addr, int timeout_ms)
2576{
2577 struct rdma_id_private *id_priv;
2578 int ret;
2579
2580 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2581 if (id_priv->state == RDMA_CM_IDLE) {
e51060f0
SH		 2582 ret = cma_bind_addr(id, src_addr, dst_addr);
2583 if (ret)
2584 return ret;
2585 }
2586
4ae7152e
SH		 2587 if (cma_family(id_priv) != dst_addr->sa_family)
2588 return -EINVAL;
2589
550e5ca7 2590 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
e51060f0
SH		 2591 return -EINVAL;
2592
2593 atomic_inc(&id_priv->refcount);
f4753834 2594 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
f17df3b0 2595 if (cma_any_addr(dst_addr)) {
e51060f0 2596 ret = cma_resolve_loopback(id_priv);
f17df3b0
SH		 2597 } else {
2598 if (dst_addr->sa_family == AF_IB) {
2599 ret = cma_resolve_ib_addr(id_priv);
2600 } else {
2601 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2602 dst_addr, &id->route.addr.dev_addr,
2603 timeout_ms, addr_handler, id_priv);
2604 }
2605 }
e51060f0
SH		 2606 if (ret)
2607 goto err;
2608
2609 return 0;
2610err:
550e5ca7 2611 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 2612 cma_deref_id(id_priv);
2613 return ret;
2614}
2615EXPORT_SYMBOL(rdma_resolve_addr);
2616
a9bb7912
HS		 2617int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2618{
2619 struct rdma_id_private *id_priv;
2620 unsigned long flags;
2621 int ret;
2622
2623 id_priv = container_of(id, struct rdma_id_private, id);
2624 spin_lock_irqsave(&id_priv->lock, flags);
c8dea2f9 2625 if (reuse || id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 2626 id_priv->reuseaddr = reuse;
2627 ret = 0;
2628 } else {
2629 ret = -EINVAL;
2630 }
2631 spin_unlock_irqrestore(&id_priv->lock, flags);
2632 return ret;
2633}
2634EXPORT_SYMBOL(rdma_set_reuseaddr);
2635
68602120
SH		 2636int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2637{
2638 struct rdma_id_private *id_priv;
2639 unsigned long flags;
2640 int ret;
2641
2642 id_priv = container_of(id, struct rdma_id_private, id);
2643 spin_lock_irqsave(&id_priv->lock, flags);
2644 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2645 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2646 id_priv->afonly = afonly;
2647 ret = 0;
2648 } else {
2649 ret = -EINVAL;
2650 }
2651 spin_unlock_irqrestore(&id_priv->lock, flags);
2652 return ret;
2653}
2654EXPORT_SYMBOL(rdma_set_afonly);
2655
e51060f0
SH		 2656static void cma_bind_port(struct rdma_bind_list *bind_list,
2657 struct rdma_id_private *id_priv)
2658{
58afdcb7
SH		 2659 struct sockaddr *addr;
2660 struct sockaddr_ib *sib;
2661 u64 sid, mask;
2662 __be16 port;
e51060f0 2663
f4753834 2664 addr = cma_src_addr(id_priv);
58afdcb7
SH		 2665 port = htons(bind_list->port);
2666
2667 switch (addr->sa_family) {
2668 case AF_INET:
2669 ((struct sockaddr_in *) addr)->sin_port = port;
2670 break;
2671 case AF_INET6:
2672 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2673 break;
2674 case AF_IB:
2675 sib = (struct sockaddr_ib *) addr;
2676 sid = be64_to_cpu(sib->sib_sid);
2677 mask = be64_to_cpu(sib->sib_sid_mask);
2678 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2679 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2680 break;
2681 }
e51060f0
SH		 2682 id_priv->bind_list = bind_list;
2683 hlist_add_head(&id_priv->node, &bind_list->owners);
2684}
2685
aac978e1
HE		 2686static int cma_alloc_port(enum rdma_port_space ps,
2687 struct rdma_id_private *id_priv, unsigned short snum)
e51060f0
SH		 2688{
2689 struct rdma_bind_list *bind_list;
3b069c5d 2690 int ret;
e51060f0 2691
cb164b8c 2692 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2693 if (!bind_list)
2694 return -ENOMEM;
2695
aac978e1 2696 ret = cma_ps_alloc(ps, bind_list, snum);
3b069c5d
TH		 2697 if (ret < 0)
2698 goto err;
aedec080
SH		 2699
2700 bind_list->ps = ps;
3b069c5d 2701 bind_list->port = (unsigned short)ret;
aedec080
SH		 2702 cma_bind_port(bind_list, id_priv);
2703 return 0;
3b069c5d 2704err:
aedec080 2705 kfree(bind_list);
3b069c5d 2706 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
aedec080 2707}
e51060f0 2708
aac978e1
HE		 2709static int cma_alloc_any_port(enum rdma_port_space ps,
2710 struct rdma_id_private *id_priv)
aedec080 2711{
5d7220e8
TH		 2712 static unsigned int last_used_port;
2713 int low, high, remaining;
2714 unsigned int rover;
e51060f0 2715
0bbf87d8 2716 inet_get_local_port_range(&init_net, &low, &high);
5d7220e8 2717 remaining = (high - low) + 1;
63862b5b 2718 rover = prandom_u32() % remaining + low;
5d7220e8
TH		 2719retry:
2720 if (last_used_port != rover &&
aac978e1 2721 !cma_ps_find(ps, (unsigned short)rover)) {
5d7220e8
TH		 2722 int ret = cma_alloc_port(ps, id_priv, rover);
2723 /*
2724 * Remember previously used port number in order to avoid
2725 * re-using same port immediately after it is closed.
2726 */
2727 if (!ret)
2728 last_used_port = rover;
2729 if (ret != -EADDRNOTAVAIL)
2730 return ret;
e51060f0 2731 }
5d7220e8
TH		 2732 if (--remaining) {
2733 rover++;
2734 if ((rover < low) || (rover > high))
2735 rover = low;
2736 goto retry;
2737 }
2738 return -EADDRNOTAVAIL;
e51060f0
SH		 2739}
2740
a9bb7912
HS		 2741/*
2742 * Check that the requested port is available. This is called when trying to
2743 * bind to a specific port, or when trying to listen on a bound port. In
2744 * the latter case, the provided id_priv may already be on the bind_list, but
2745 * we still need to check that it's okay to start listening.
2746 */
2747static int cma_check_port(struct rdma_bind_list *bind_list,
2748 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 2749{
2750 struct rdma_id_private *cur_id;
43b752da 2751 struct sockaddr *addr, *cur_addr;
e51060f0 2752
f4753834 2753 addr = cma_src_addr(id_priv);
b67bfe0d 2754 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
a9bb7912
HS		 2755 if (id_priv == cur_id)
2756 continue;
3cd96564 2757
5b0ec991
SH		 2758 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2759 cur_id->reuseaddr)
2760 continue;
e51060f0 2761
f4753834 2762 cur_addr = cma_src_addr(cur_id);
5b0ec991
SH		 2763 if (id_priv->afonly && cur_id->afonly &&
2764 (addr->sa_family != cur_addr->sa_family))
2765 continue;
2766
2767 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2768 return -EADDRNOTAVAIL;
2769
2770 if (!cma_addr_cmp(addr, cur_addr))
2771 return -EADDRINUSE;
a9bb7912 2772 }
e51060f0
SH		 2773 return 0;
2774}
2775
aac978e1
HE		 2776static int cma_use_port(enum rdma_port_space ps,
2777 struct rdma_id_private *id_priv)
a9bb7912
HS		 2778{
2779 struct rdma_bind_list *bind_list;
2780 unsigned short snum;
2781 int ret;
2782
f4753834 2783 snum = ntohs(cma_port(cma_src_addr(id_priv)));
a9bb7912
HS		 2784 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2785 return -EACCES;
2786
aac978e1 2787 bind_list = cma_ps_find(ps, snum);
a9bb7912
HS		 2788 if (!bind_list) {
2789 ret = cma_alloc_port(ps, id_priv, snum);
2790 } else {
2791 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2792 if (!ret)
2793 cma_bind_port(bind_list, id_priv);
2794 }
2795 return ret;
2796}
2797
2798static int cma_bind_listen(struct rdma_id_private *id_priv)
2799{
2800 struct rdma_bind_list *bind_list = id_priv->bind_list;
2801 int ret = 0;
2802
2803 mutex_lock(&lock);
2804 if (bind_list->owners.first->next)
2805 ret = cma_check_port(bind_list, id_priv, 0);
2806 mutex_unlock(&lock);
2807 return ret;
2808}
2809
aac978e1
HE		 2810static enum rdma_port_space cma_select_inet_ps(
2811 struct rdma_id_private *id_priv)
e51060f0 2812{
e51060f0 2813 switch (id_priv->id.ps) {
e51060f0 2814 case RDMA_PS_TCP:
628e5f6d 2815 case RDMA_PS_UDP:
c8f6a362 2816 case RDMA_PS_IPOIB:
2d2e9415 2817 case RDMA_PS_IB:
aac978e1 2818 return id_priv->id.ps;
e51060f0 2819 default:
aac978e1
HE		 2820
2821 return 0;
58afdcb7
SH		 2822 }
2823}
2824
aac978e1 2825static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
58afdcb7 2826{
aac978e1 2827 enum rdma_port_space ps = 0;
58afdcb7
SH		 2828 struct sockaddr_ib *sib;
2829 u64 sid_ps, mask, sid;
2830
f4753834 2831 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
58afdcb7
SH		 2832 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2833 sid = be64_to_cpu(sib->sib_sid) & mask;
2834
2835 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2836 sid_ps = RDMA_IB_IP_PS_IB;
aac978e1 2837 ps = RDMA_PS_IB;
58afdcb7
SH		 2838 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2839 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2840 sid_ps = RDMA_IB_IP_PS_TCP;
aac978e1 2841 ps = RDMA_PS_TCP;
58afdcb7
SH		 2842 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2843 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2844 sid_ps = RDMA_IB_IP_PS_UDP;
aac978e1 2845 ps = RDMA_PS_UDP;
e51060f0
SH		 2846 }
2847
58afdcb7
SH		 2848 if (ps) {
2849 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2850 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2851 be64_to_cpu(sib->sib_sid_mask));
2852 }
2853 return ps;
2854}
2855
2856static int cma_get_port(struct rdma_id_private *id_priv)
2857{
aac978e1 2858 enum rdma_port_space ps;
58afdcb7
SH		 2859 int ret;
2860
f4753834 2861 if (cma_family(id_priv) != AF_IB)
58afdcb7
SH		 2862 ps = cma_select_inet_ps(id_priv);
2863 else
2864 ps = cma_select_ib_ps(id_priv);
2865 if (!ps)
2866 return -EPROTONOSUPPORT;
2867
e51060f0 2868 mutex_lock(&lock);
f4753834 2869 if (cma_any_port(cma_src_addr(id_priv)))
aedec080 2870 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2871 else
2872 ret = cma_use_port(ps, id_priv);
2873 mutex_unlock(&lock);
2874
2875 return ret;
2876}
2877
d14714df
SH		 2878static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2879 struct sockaddr *addr)
2880{
d90f9b35 2881#if IS_ENABLED(CONFIG_IPV6)
d14714df
SH		 2882 struct sockaddr_in6 *sin6;
2883
2884 if (addr->sa_family != AF_INET6)
2885 return 0;
2886
2887 sin6 = (struct sockaddr_in6 *) addr;
5462eddd
SK		 2888
2889 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
2890 return 0;
2891
2892 if (!sin6->sin6_scope_id)
d14714df
SH		 2893 return -EINVAL;
2894
2895 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2896#endif
2897 return 0;
2898}
2899
a9bb7912
HS		 2900int rdma_listen(struct rdma_cm_id *id, int backlog)
2901{
2902 struct rdma_id_private *id_priv;
2903 int ret;
2904
2905 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2906 if (id_priv->state == RDMA_CM_IDLE) {
f4753834
SH		 2907 id->route.addr.src_addr.ss_family = AF_INET;
2908 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
a9bb7912
HS		 2909 if (ret)
2910 return ret;
2911 }
2912
550e5ca7 2913 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
a9bb7912
HS		 2914 return -EINVAL;
2915
2916 if (id_priv->reuseaddr) {
2917 ret = cma_bind_listen(id_priv);
2918 if (ret)
2919 goto err;
2920 }
2921
2922 id_priv->backlog = backlog;
2923 if (id->device) {
72219cea 2924 if (rdma_cap_ib_cm(id->device, 1)) {
a9bb7912
HS		 2925 ret = cma_ib_listen(id_priv);
2926 if (ret)
2927 goto err;
04215330 2928 } else if (rdma_cap_iw_cm(id->device, 1)) {
a9bb7912
HS		 2929 ret = cma_iw_listen(id_priv, backlog);
2930 if (ret)
2931 goto err;
21655afc 2932 } else {
a9bb7912
HS		 2933 ret = -ENOSYS;
2934 goto err;
2935 }
2936 } else
2937 cma_listen_on_all(id_priv);
2938
2939 return 0;
2940err:
2941 id_priv->backlog = 0;
550e5ca7 2942 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 2943 return ret;
2944}
2945EXPORT_SYMBOL(rdma_listen);
2946
e51060f0
SH		 2947int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2948{
2949 struct rdma_id_private *id_priv;
2950 int ret;
2951
680f920a
SH		 2952 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2953 addr->sa_family != AF_IB)
e51060f0
SH		 2954 return -EAFNOSUPPORT;
2955
2956 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2957 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 2958 return -EINVAL;
2959
d14714df
SH		 2960 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2961 if (ret)
2962 goto err1;
2963
7b85627b 2964 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
8523c048 2965 if (!cma_any_addr(addr)) {
680f920a 2966 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
e51060f0 2967 if (ret)
255d0c14
KK		 2968 goto err1;
2969
be9130cc 2970 ret = cma_acquire_dev(id_priv, NULL);
255d0c14
KK		 2971 if (ret)
2972 goto err1;
e51060f0
SH		 2973 }
2974
68602120
SH		 2975 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2976 if (addr->sa_family == AF_INET)
2977 id_priv->afonly = 1;
5b0ec991 2978#if IS_ENABLED(CONFIG_IPV6)
68602120
SH		 2979 else if (addr->sa_family == AF_INET6)
2980 id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
5b0ec991 2981#endif
68602120 2982 }
e51060f0
SH		 2983 ret = cma_get_port(id_priv);
2984 if (ret)
255d0c14 2985 goto err2;
e51060f0
SH		 2986
2987 return 0;
255d0c14 2988err2:
a396d43a
SH		 2989 if (id_priv->cma_dev)
2990 cma_release_dev(id_priv);
255d0c14 2991err1:
550e5ca7 2992 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 2993 return ret;
2994}
2995EXPORT_SYMBOL(rdma_bind_addr);
2996
f4753834 2997static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
e51060f0 2998{
e51060f0 2999 struct cma_hdr *cma_hdr;
e51060f0 3000
01602f11
SH		 3001 cma_hdr = hdr;
3002 cma_hdr->cma_version = CMA_VERSION;
f4753834 3003 if (cma_family(id_priv) == AF_INET) {
1f5175ad
AS		 3004 struct sockaddr_in *src4, *dst4;
3005
f4753834
SH		 3006 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3007 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
1f5175ad 3008
01602f11
SH		 3009 cma_set_ip_ver(cma_hdr, 4);
3010 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3011 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3012 cma_hdr->port = src4->sin_port;
e8160e15 3013 } else if (cma_family(id_priv) == AF_INET6) {
1f5175ad
AS		 3014 struct sockaddr_in6 *src6, *dst6;
3015
f4753834
SH		 3016 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3017 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
1f5175ad 3018
01602f11
SH		 3019 cma_set_ip_ver(cma_hdr, 6);
3020 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3021 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3022 cma_hdr->port = src6->sin6_port;
e51060f0
SH		 3023 }
3024 return 0;
3025}
3026
628e5f6d
SH		 3027static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3028 struct ib_cm_event *ib_event)
3029{
3030 struct rdma_id_private *id_priv = cm_id->context;
3031 struct rdma_cm_event event;
3032 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3033 int ret = 0;
3034
550e5ca7 3035 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
8aa08602 3036 return 0;
628e5f6d 3037
8aa08602 3038 memset(&event, 0, sizeof event);
628e5f6d
SH		 3039 switch (ib_event->event) {
3040 case IB_CM_SIDR_REQ_ERROR:
3041 event.event = RDMA_CM_EVENT_UNREACHABLE;
3042 event.status = -ETIMEDOUT;
3043 break;
3044 case IB_CM_SIDR_REP_RECEIVED:
3045 event.param.ud.private_data = ib_event->private_data;
3046 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3047 if (rep->status != IB_SIDR_SUCCESS) {
3048 event.event = RDMA_CM_EVENT_UNREACHABLE;
3049 event.status = ib_event->param.sidr_rep_rcvd.status;
3050 break;
3051 }
5c438135 3052 ret = cma_set_qkey(id_priv, rep->qkey);
d2ca39f2
YE		 3053 if (ret) {
3054 event.event = RDMA_CM_EVENT_ADDR_ERROR;
5c438135 3055 event.status = ret;
628e5f6d
SH		 3056 break;
3057 }
3058 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3059 id_priv->id.route.path_rec,
3060 &event.param.ud.ah_attr);
3061 event.param.ud.qp_num = rep->qpn;
3062 event.param.ud.qkey = rep->qkey;
3063 event.event = RDMA_CM_EVENT_ESTABLISHED;
3064 event.status = 0;
3065 break;
3066 default:
468f2239 3067 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 3068 ib_event->event);
3069 goto out;
3070 }
3071
3072 ret = id_priv->id.event_handler(&id_priv->id, &event);
3073 if (ret) {
3074 /* Destroy the CM ID by returning a non-zero value. */
3075 id_priv->cm_id.ib = NULL;
550e5ca7 3076 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 3077 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 3078 rdma_destroy_id(&id_priv->id);
3079 return ret;
3080 }
3081out:
de910bd9 3082 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 3083 return ret;
3084}
3085
3086static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3087 struct rdma_conn_param *conn_param)
3088{
3089 struct ib_cm_sidr_req_param req;
0c9361fc 3090 struct ib_cm_id *id;
e511d1ae 3091 void *private_data;
e8160e15 3092 int offset, ret;
628e5f6d 3093
e511d1ae 3094 memset(&req, 0, sizeof req);
e8160e15
SH		 3095 offset = cma_user_data_offset(id_priv);
3096 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 3097 if (req.private_data_len < conn_param->private_data_len)
3098 return -EINVAL;
3099
e8160e15 3100 if (req.private_data_len) {
e511d1ae
SH		 3101 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3102 if (!private_data)
e8160e15
SH		 3103 return -ENOMEM;
3104 } else {
e511d1ae 3105 private_data = NULL;
e8160e15 3106 }
628e5f6d
SH		 3107
3108 if (conn_param->private_data && conn_param->private_data_len)
e511d1ae
SH		 3109 memcpy(private_data + offset, conn_param->private_data,
3110 conn_param->private_data_len);
628e5f6d 3111
e511d1ae
SH		 3112 if (private_data) {
3113 ret = cma_format_hdr(private_data, id_priv);
e8160e15
SH		 3114 if (ret)
3115 goto out;
e511d1ae 3116 req.private_data = private_data;
e8160e15 3117 }
628e5f6d 3118
0c9361fc
JM		 3119 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3120 id_priv);
3121 if (IS_ERR(id)) {
3122 ret = PTR_ERR(id);
628e5f6d
SH		 3123 goto out;
3124 }
0c9361fc 3125 id_priv->cm_id.ib = id;
628e5f6d 3126
f4753834 3127 req.path = id_priv->id.route.path_rec;
cf53936f 3128 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
628e5f6d
SH		 3129 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3130 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3131
3132 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3133 if (ret) {
3134 ib_destroy_cm_id(id_priv->cm_id.ib);
3135 id_priv->cm_id.ib = NULL;
3136 }
3137out:
e511d1ae 3138 kfree(private_data);
628e5f6d
SH		 3139 return ret;
3140}
3141
e51060f0
SH		 3142static int cma_connect_ib(struct rdma_id_private *id_priv,
3143 struct rdma_conn_param *conn_param)
3144{
3145 struct ib_cm_req_param req;
3146 struct rdma_route *route;
3147 void *private_data;
0c9361fc 3148 struct ib_cm_id *id;
e51060f0
SH		 3149 int offset, ret;
3150
3151 memset(&req, 0, sizeof req);
e8160e15 3152 offset = cma_user_data_offset(id_priv);
e51060f0 3153 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 3154 if (req.private_data_len < conn_param->private_data_len)
3155 return -EINVAL;
3156
e8160e15
SH		 3157 if (req.private_data_len) {
3158 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3159 if (!private_data)
3160 return -ENOMEM;
3161 } else {
3162 private_data = NULL;
3163 }
e51060f0
SH		 3164
3165 if (conn_param->private_data && conn_param->private_data_len)
3166 memcpy(private_data + offset, conn_param->private_data,
3167 conn_param->private_data_len);
3168
0c9361fc
JM		 3169 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3170 if (IS_ERR(id)) {
3171 ret = PTR_ERR(id);
e51060f0
SH		 3172 goto out;
3173 }
0c9361fc 3174 id_priv->cm_id.ib = id;
e51060f0
SH		 3175
3176 route = &id_priv->id.route;
e8160e15
SH		 3177 if (private_data) {
3178 ret = cma_format_hdr(private_data, id_priv);
3179 if (ret)
3180 goto out;
3181 req.private_data = private_data;
3182 }
e51060f0
SH		 3183
3184 req.primary_path = &route->path_rec[0];
3185 if (route->num_paths == 2)
3186 req.alternate_path = &route->path_rec[1];
3187
cf53936f 3188 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
e51060f0 3189 req.qp_num = id_priv->qp_num;
18c441a6 3190 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 3191 req.starting_psn = id_priv->seq_num;
3192 req.responder_resources = conn_param->responder_resources;
3193 req.initiator_depth = conn_param->initiator_depth;
3194 req.flow_control = conn_param->flow_control;
4ede178a
SH		 3195 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3196 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 3197 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3198 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3199 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3200 req.srq = id_priv->srq ? 1 : 0;
3201
3202 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3203out:
0c9361fc
JM		 3204 if (ret && !IS_ERR(id)) {
3205 ib_destroy_cm_id(id);
675a027c
KK		 3206 id_priv->cm_id.ib = NULL;
3207 }
3208
e51060f0
SH		 3209 kfree(private_data);
3210 return ret;
3211}
3212
07ebafba
TT		 3213static int cma_connect_iw(struct rdma_id_private *id_priv,
3214 struct rdma_conn_param *conn_param)
3215{
3216 struct iw_cm_id *cm_id;
07ebafba
TT		 3217 int ret;
3218 struct iw_cm_conn_param iw_param;
3219
3220 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 3221 if (IS_ERR(cm_id))
3222 return PTR_ERR(cm_id);
07ebafba 3223
68cdba06 3224 cm_id->tos = id_priv->tos;
07ebafba
TT		 3225 id_priv->cm_id.iw = cm_id;
3226
24d44a39
SW		 3227 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3228 rdma_addr_size(cma_src_addr(id_priv)));
3229 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3230 rdma_addr_size(cma_dst_addr(id_priv)));
07ebafba 3231
5851bb89 3232 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 3233 if (ret)
3234 goto out;
07ebafba 3235
f45ee80e
HS		 3236 if (conn_param) {
3237 iw_param.ord = conn_param->initiator_depth;
3238 iw_param.ird = conn_param->responder_resources;
3239 iw_param.private_data = conn_param->private_data;
3240 iw_param.private_data_len = conn_param->private_data_len;
3241 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3242 } else {
3243 memset(&iw_param, 0, sizeof iw_param);
07ebafba 3244 iw_param.qpn = id_priv->qp_num;
f45ee80e 3245 }
07ebafba
TT		 3246 ret = iw_cm_connect(cm_id, &iw_param);
3247out:
0c9361fc 3248 if (ret) {
675a027c
KK		 3249 iw_destroy_cm_id(cm_id);
3250 id_priv->cm_id.iw = NULL;
3251 }
07ebafba
TT		 3252 return ret;
3253}
3254
e51060f0
SH		 3255int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3256{
3257 struct rdma_id_private *id_priv;
3258 int ret;
3259
3260 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3261 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
e51060f0
SH		 3262 return -EINVAL;
3263
3264 if (!id->qp) {
3265 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3266 id_priv->srq = conn_param->srq;
3267 }
3268
72219cea 3269 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 3270 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 3271 ret = cma_resolve_ib_udp(id_priv, conn_param);
3272 else
3273 ret = cma_connect_ib(id_priv, conn_param);
04215330 3274 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 3275 ret = cma_connect_iw(id_priv, conn_param);
21655afc 3276 else
e51060f0 3277 ret = -ENOSYS;
e51060f0
SH		 3278 if (ret)
3279 goto err;
3280
3281 return 0;
3282err:
550e5ca7 3283 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
e51060f0
SH		 3284 return ret;
3285}
3286EXPORT_SYMBOL(rdma_connect);
3287
3288static int cma_accept_ib(struct rdma_id_private *id_priv,
3289 struct rdma_conn_param *conn_param)
3290{
3291 struct ib_cm_rep_param rep;
5851bb89 3292 int ret;
0fe313b0 3293
5851bb89
SH		 3294 ret = cma_modify_qp_rtr(id_priv, conn_param);
3295 if (ret)
3296 goto out;
0fe313b0 3297
5851bb89
SH		 3298 ret = cma_modify_qp_rts(id_priv, conn_param);
3299 if (ret)
3300 goto out;
e51060f0
SH		 3301
3302 memset(&rep, 0, sizeof rep);
3303 rep.qp_num = id_priv->qp_num;
3304 rep.starting_psn = id_priv->seq_num;
3305 rep.private_data = conn_param->private_data;
3306 rep.private_data_len = conn_param->private_data_len;
3307 rep.responder_resources = conn_param->responder_resources;
3308 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 3309 rep.failover_accepted = 0;
3310 rep.flow_control = conn_param->flow_control;
4ede178a 3311 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 3312 rep.srq = id_priv->srq ? 1 : 0;
3313
0fe313b0
SH		 3314 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3315out:
3316 return ret;
e51060f0
SH		 3317}
3318
07ebafba
TT		 3319static int cma_accept_iw(struct rdma_id_private *id_priv,
3320 struct rdma_conn_param *conn_param)
3321{
3322 struct iw_cm_conn_param iw_param;
3323 int ret;
3324
5851bb89 3325 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 3326 if (ret)
3327 return ret;
3328
3329 iw_param.ord = conn_param->initiator_depth;
3330 iw_param.ird = conn_param->responder_resources;
3331 iw_param.private_data = conn_param->private_data;
3332 iw_param.private_data_len = conn_param->private_data_len;
3333 if (id_priv->id.qp) {
3334 iw_param.qpn = id_priv->qp_num;
3335 } else
3336 iw_param.qpn = conn_param->qp_num;
3337
3338 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3339}
3340
628e5f6d 3341static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
5c438135 3342 enum ib_cm_sidr_status status, u32 qkey,
628e5f6d
SH		 3343 const void *private_data, int private_data_len)
3344{
3345 struct ib_cm_sidr_rep_param rep;
d2ca39f2 3346 int ret;
628e5f6d
SH		 3347
3348 memset(&rep, 0, sizeof rep);
3349 rep.status = status;
3350 if (status == IB_SIDR_SUCCESS) {
5c438135 3351 ret = cma_set_qkey(id_priv, qkey);
d2ca39f2
YE		 3352 if (ret)
3353 return ret;
628e5f6d 3354 rep.qp_num = id_priv->qp_num;
c8f6a362 3355 rep.qkey = id_priv->qkey;
628e5f6d
SH		 3356 }
3357 rep.private_data = private_data;
3358 rep.private_data_len = private_data_len;
3359
3360 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3361}
3362
e51060f0
SH		 3363int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3364{
3365 struct rdma_id_private *id_priv;
3366 int ret;
3367
3368 id_priv = container_of(id, struct rdma_id_private, id);
83e9502d
NM		 3369
3370 id_priv->owner = task_pid_nr(current);
3371
550e5ca7 3372 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
e51060f0
SH		 3373 return -EINVAL;
3374
3375 if (!id->qp && conn_param) {
3376 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3377 id_priv->srq = conn_param->srq;
3378 }
3379
72219cea 3380 if (rdma_cap_ib_cm(id->device, id->port_num)) {
f45ee80e
HS		 3381 if (id->qp_type == IB_QPT_UD) {
3382 if (conn_param)
3383 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3384 conn_param->qkey,
f45ee80e
HS		 3385 conn_param->private_data,
3386 conn_param->private_data_len);
3387 else
3388 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3389 0, NULL, 0);
f45ee80e
HS		 3390 } else {
3391 if (conn_param)
3392 ret = cma_accept_ib(id_priv, conn_param);
3393 else
3394 ret = cma_rep_recv(id_priv);
3395 }
04215330 3396 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 3397 ret = cma_accept_iw(id_priv, conn_param);
21655afc 3398 else
e51060f0 3399 ret = -ENOSYS;
e51060f0
SH		 3400
3401 if (ret)
3402 goto reject;
3403
3404 return 0;
3405reject:
c5483388 3406 cma_modify_qp_err(id_priv);
e51060f0
SH		 3407 rdma_reject(id, NULL, 0);
3408 return ret;
3409}
3410EXPORT_SYMBOL(rdma_accept);
3411
0fe313b0
SH		 3412int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3413{
3414 struct rdma_id_private *id_priv;
3415 int ret;
3416
3417 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3418 if (!id_priv->cm_id.ib)
0fe313b0
SH		 3419 return -EINVAL;
3420
3421 switch (id->device->node_type) {
3422 case RDMA_NODE_IB_CA:
3423 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3424 break;
3425 default:
3426 ret = 0;
3427 break;
3428 }
3429 return ret;
3430}
3431EXPORT_SYMBOL(rdma_notify);
3432
e51060f0
SH		 3433int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3434 u8 private_data_len)
3435{
3436 struct rdma_id_private *id_priv;
3437 int ret;
3438
3439 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3440 if (!id_priv->cm_id.ib)
e51060f0
SH		 3441 return -EINVAL;
3442
72219cea 3443 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 3444 if (id->qp_type == IB_QPT_UD)
5c438135 3445 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
628e5f6d
SH		 3446 private_data, private_data_len);
3447 else
3448 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3449 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3450 0, private_data, private_data_len);
04215330 3451 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba
TT		 3452 ret = iw_cm_reject(id_priv->cm_id.iw,
3453 private_data, private_data_len);
21655afc 3454 } else
e51060f0 3455 ret = -ENOSYS;
21655afc 3456
e51060f0
SH		 3457 return ret;
3458}
3459EXPORT_SYMBOL(rdma_reject);
3460
3461int rdma_disconnect(struct rdma_cm_id *id)
3462{
3463 struct rdma_id_private *id_priv;
3464 int ret;
3465
3466 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3467 if (!id_priv->cm_id.ib)
e51060f0
SH		 3468 return -EINVAL;
3469
72219cea 3470 if (rdma_cap_ib_cm(id->device, id->port_num)) {
c5483388 3471 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 3472 if (ret)
3473 goto out;
e51060f0
SH		 3474 /* Initiate or respond to a disconnect. */
3475 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3476 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
04215330 3477 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba 3478 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
21655afc 3479 } else
07ebafba 3480 ret = -EINVAL;
21655afc 3481
e51060f0
SH		 3482out:
3483 return ret;
3484}
3485EXPORT_SYMBOL(rdma_disconnect);
3486
c8f6a362
SH		 3487static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3488{
3489 struct rdma_id_private *id_priv;
3490 struct cma_multicast *mc = multicast->context;
3491 struct rdma_cm_event event;
3492 int ret;
3493
3494 id_priv = mc->id_priv;
550e5ca7
NM		 3495 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3496 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
8aa08602 3497 return 0;
c8f6a362 3498
5c438135
SH		 3499 if (!status)
3500 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
c5483388 3501 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 3502 if (!status && id_priv->id.qp)
3503 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
46ea5061 3504 be16_to_cpu(multicast->rec.mlid));
c5483388 3505 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 3506
3507 memset(&event, 0, sizeof event);
3508 event.status = status;
3509 event.param.ud.private_data = mc->context;
3510 if (!status) {
3511 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3512 ib_init_ah_from_mcmember(id_priv->id.device,
3513 id_priv->id.port_num, &multicast->rec,
3514 &event.param.ud.ah_attr);
3515 event.param.ud.qp_num = 0xFFFFFF;
3516 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3517 } else
3518 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3519
3520 ret = id_priv->id.event_handler(&id_priv->id, &event);
3521 if (ret) {
550e5ca7 3522 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 3523 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3524 rdma_destroy_id(&id_priv->id);
3525 return 0;
3526 }
8aa08602 3527
de910bd9 3528 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3529 return 0;
3530}
3531
3532static void cma_set_mgid(struct rdma_id_private *id_priv,
3533 struct sockaddr *addr, union ib_gid *mgid)
3534{
3535 unsigned char mc_map[MAX_ADDR_LEN];
3536 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3537 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3538 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3539
3540 if (cma_any_addr(addr)) {
3541 memset(mgid, 0, sizeof *mgid);
3542 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 3543 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 3544 0xFF10A01B)) {
3545 /* IPv6 address is an SA assigned MGID. */
3546 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
5bc2b7b3
SH		 3547 } else if (addr->sa_family == AF_IB) {
3548 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
e2e62697
JG		 3549 } else if ((addr->sa_family == AF_INET6)) {
3550 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3551 if (id_priv->id.ps == RDMA_PS_UDP)
3552 mc_map[7] = 0x01; /* Use RDMA CM signature */
3553 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 3554 } else {
a9e527e3 3555 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 3556 if (id_priv->id.ps == RDMA_PS_UDP)
3557 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 3558 *mgid = *(union ib_gid *) (mc_map + 4);
3559 }
3560}
3561
3562static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3563 struct cma_multicast *mc)
3564{
3565 struct ib_sa_mcmember_rec rec;
3566 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3567 ib_sa_comp_mask comp_mask;
3568 int ret;
3569
3570 ib_addr_get_mgid(dev_addr, &rec.mgid);
3571 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3572 &rec.mgid, &rec);
3573 if (ret)
3574 return ret;
3575
5bc2b7b3
SH		 3576 ret = cma_set_qkey(id_priv, 0);
3577 if (ret)
3578 return ret;
3579
3f446754 3580 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
5bc2b7b3 3581 rec.qkey = cpu_to_be32(id_priv->qkey);
6f8372b6 3582 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 3583 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3584 rec.join_state = 1;
3585
3586 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3587 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3588 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3589 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3590 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3591
84adeee9
YE		 3592 if (id_priv->id.ps == RDMA_PS_IPOIB)
3593 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2a22fb8c
DB		 3594 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3595 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3596 IB_SA_MCMEMBER_REC_MTU |
3597 IB_SA_MCMEMBER_REC_HOP_LIMIT;
84adeee9 3598
c8f6a362
SH		 3599 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3600 id_priv->id.port_num, &rec,
3601 comp_mask, GFP_KERNEL,
3602 cma_ib_mc_handler, mc);
8c6ffba0 3603 return PTR_ERR_OR_ZERO(mc->multicast.ib);
c8f6a362
SH		 3604}
3605
3c86aa70
EC		 3606static void iboe_mcast_work_handler(struct work_struct *work)
3607{
3608 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3609 struct cma_multicast *mc = mw->mc;
3610 struct ib_sa_multicast *m = mc->multicast.ib;
3611
3612 mc->multicast.ib->context = mc;
3613 cma_ib_mc_handler(0, m);
3614 kref_put(&mc->mcref, release_mc);
3615 kfree(mw);
3616}
3617
3618static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3619{
3620 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3621 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3622
3623 if (cma_any_addr(addr)) {
3624 memset(mgid, 0, sizeof *mgid);
3625 } else if (addr->sa_family == AF_INET6) {
3626 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3627 } else {
3628 mgid->raw[0] = 0xff;
3629 mgid->raw[1] = 0x0e;
3630 mgid->raw[2] = 0;
3631 mgid->raw[3] = 0;
3632 mgid->raw[4] = 0;
3633 mgid->raw[5] = 0;
3634 mgid->raw[6] = 0;
3635 mgid->raw[7] = 0;
3636 mgid->raw[8] = 0;
3637 mgid->raw[9] = 0;
3638 mgid->raw[10] = 0xff;
3639 mgid->raw[11] = 0xff;
3640 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3641 }
3642}
3643
3644static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3645 struct cma_multicast *mc)
3646{
3647 struct iboe_mcast_work *work;
3648 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3649 int err;
3650 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3651 struct net_device *ndev = NULL;
3652
3653 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3654 return -EINVAL;
3655
3656 work = kzalloc(sizeof *work, GFP_KERNEL);
3657 if (!work)
3658 return -ENOMEM;
3659
3660 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3661 if (!mc->multicast.ib) {
3662 err = -ENOMEM;
3663 goto out1;
3664 }
3665
3666 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3667
3668 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3669 if (id_priv->id.ps == RDMA_PS_UDP)
3670 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3671
3672 if (dev_addr->bound_dev_if)
3673 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3674 if (!ndev) {
3675 err = -ENODEV;
3676 goto out2;
3677 }
3678 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3679 mc->multicast.ib->rec.hop_limit = 1;
3680 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3681 dev_put(ndev);
3682 if (!mc->multicast.ib->rec.mtu) {
3683 err = -EINVAL;
3684 goto out2;
3685 }
7b85627b
MS		 3686 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3687 &mc->multicast.ib->rec.port_gid);
3c86aa70
EC		 3688 work->id = id_priv;
3689 work->mc = mc;
3690 INIT_WORK(&work->work, iboe_mcast_work_handler);
3691 kref_get(&mc->mcref);
3692 queue_work(cma_wq, &work->work);
3693
3694 return 0;
3695
3696out2:
3697 kfree(mc->multicast.ib);
3698out1:
3699 kfree(work);
3700 return err;
3701}
3702
c8f6a362
SH		 3703int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3704 void *context)
3705{
3706 struct rdma_id_private *id_priv;
3707 struct cma_multicast *mc;
3708 int ret;
3709
3710 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 3711 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3712 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 3713 return -EINVAL;
3714
3715 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3716 if (!mc)
3717 return -ENOMEM;
3718
ef560861 3719 memcpy(&mc->addr, addr, rdma_addr_size(addr));
c8f6a362
SH		 3720 mc->context = context;
3721 mc->id_priv = id_priv;
3722
3723 spin_lock(&id_priv->lock);
3724 list_add(&mc->list, &id_priv->mc_list);
3725 spin_unlock(&id_priv->lock);
3726
5d9fb044 3727 if (rdma_protocol_roce(id->device, id->port_num)) {
5c9a5282
MW		 3728 kref_init(&mc->mcref);
3729 ret = cma_iboe_join_multicast(id_priv, mc);
a31ad3b0 3730 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
5c9a5282
MW		 3731 ret = cma_join_ib_multicast(id_priv, mc);
3732 else
c8f6a362 3733 ret = -ENOSYS;
c8f6a362
SH		 3734
3735 if (ret) {
3736 spin_lock_irq(&id_priv->lock);
3737 list_del(&mc->list);
3738 spin_unlock_irq(&id_priv->lock);
3739 kfree(mc);
3740 }
3741 return ret;
3742}
3743EXPORT_SYMBOL(rdma_join_multicast);
3744
3745void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3746{
3747 struct rdma_id_private *id_priv;
3748 struct cma_multicast *mc;
3749
3750 id_priv = container_of(id, struct rdma_id_private, id);
3751 spin_lock_irq(&id_priv->lock);
3752 list_for_each_entry(mc, &id_priv->mc_list, list) {
ef560861 3753 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
c8f6a362
SH		 3754 list_del(&mc->list);
3755 spin_unlock_irq(&id_priv->lock);
3756
3757 if (id->qp)
3758 ib_detach_mcast(id->qp,
3759 &mc->multicast.ib->rec.mgid,
46ea5061 3760 be16_to_cpu(mc->multicast.ib->rec.mlid));
5c9a5282
MW		 3761
3762 BUG_ON(id_priv->cma_dev->device != id->device);
3763
a31ad3b0 3764 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
5c9a5282
MW		 3765 ib_sa_free_multicast(mc->multicast.ib);
3766 kfree(mc);
5d9fb044 3767 } else if (rdma_protocol_roce(id->device, id->port_num))
5c9a5282
MW		 3768 kref_put(&mc->mcref, release_mc);
3769
c8f6a362
SH		 3770 return;
3771 }
3772 }
3773 spin_unlock_irq(&id_priv->lock);
3774}
3775EXPORT_SYMBOL(rdma_leave_multicast);
3776
dd5bdff8
OG		 3777static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3778{
3779 struct rdma_dev_addr *dev_addr;
3780 struct cma_ndev_work *work;
3781
3782 dev_addr = &id_priv->id.route.addr.dev_addr;
3783
6266ed6e 3784 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 3785 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3786 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3787 ndev->name, &id_priv->id);
3788 work = kzalloc(sizeof *work, GFP_KERNEL);
3789 if (!work)
3790 return -ENOMEM;
3791
3792 INIT_WORK(&work->work, cma_ndev_work_handler);
3793 work->id = id_priv;
3794 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3795 atomic_inc(&id_priv->refcount);
3796 queue_work(cma_wq, &work->work);
3797 }
3798
3799 return 0;
3800}
3801
3802static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
351638e7 3803 void *ptr)
dd5bdff8 3804{
351638e7 3805 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
dd5bdff8
OG		 3806 struct cma_device *cma_dev;
3807 struct rdma_id_private *id_priv;
3808 int ret = NOTIFY_DONE;
3809
3810 if (dev_net(ndev) != &init_net)
3811 return NOTIFY_DONE;
3812
3813 if (event != NETDEV_BONDING_FAILOVER)
3814 return NOTIFY_DONE;
3815
3816 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3817 return NOTIFY_DONE;
3818
3819 mutex_lock(&lock);
3820 list_for_each_entry(cma_dev, &dev_list, list)
3821 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3822 ret = cma_netdev_change(ndev, id_priv);
3823 if (ret)
3824 goto out;
3825 }
3826
3827out:
3828 mutex_unlock(&lock);
3829 return ret;
3830}
3831
3832static struct notifier_block cma_nb = {
3833 .notifier_call = cma_netdev_callback
3834};
3835
e51060f0
SH		 3836static void cma_add_one(struct ib_device *device)
3837{
3838 struct cma_device *cma_dev;
3839 struct rdma_id_private *id_priv;
3840
3841 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3842 if (!cma_dev)
3843 return;
3844
3845 cma_dev->device = device;
e51060f0
SH		 3846
3847 init_completion(&cma_dev->comp);
3848 atomic_set(&cma_dev->refcount, 1);
3849 INIT_LIST_HEAD(&cma_dev->id_list);
3850 ib_set_client_data(device, &cma_client, cma_dev);
3851
3852 mutex_lock(&lock);
3853 list_add_tail(&cma_dev->list, &dev_list);
3854 list_for_each_entry(id_priv, &listen_any_list, list)
3855 cma_listen_on_dev(id_priv, cma_dev);
3856 mutex_unlock(&lock);
e51060f0
SH		 3857}
3858
3859static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3860{
a1b1b61f 3861 struct rdma_cm_event event;
550e5ca7 3862 enum rdma_cm_state state;
de910bd9 3863 int ret = 0;
e51060f0
SH		 3864
3865 /* Record that we want to remove the device */
550e5ca7
NM		 3866 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3867 if (state == RDMA_CM_DESTROYING)
e51060f0
SH		 3868 return 0;
3869
3870 cma_cancel_operation(id_priv, state);
de910bd9 3871 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 3872
3873 /* Check for destruction from another callback. */
550e5ca7 3874 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
de910bd9 3875 goto out;
e51060f0 3876
a1b1b61f
SH		 3877 memset(&event, 0, sizeof event);
3878 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 3879 ret = id_priv->id.event_handler(&id_priv->id, &event);
3880out:
3881 mutex_unlock(&id_priv->handler_mutex);
3882 return ret;
e51060f0
SH		 3883}
3884
3885static void cma_process_remove(struct cma_device *cma_dev)
3886{
e51060f0
SH		 3887 struct rdma_id_private *id_priv;
3888 int ret;
3889
e51060f0
SH		 3890 mutex_lock(&lock);
3891 while (!list_empty(&cma_dev->id_list)) {
3892 id_priv = list_entry(cma_dev->id_list.next,
3893 struct rdma_id_private, list);
3894
d02d1f53 3895 list_del(&id_priv->listen_list);
94de178a 3896 list_del_init(&id_priv->list);
e51060f0
SH		 3897 atomic_inc(&id_priv->refcount);
3898 mutex_unlock(&lock);
3899
d02d1f53 3900 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 3901 cma_deref_id(id_priv);
3902 if (ret)
3903 rdma_destroy_id(&id_priv->id);
3904
3905 mutex_lock(&lock);
3906 }
3907 mutex_unlock(&lock);
3908
3909 cma_deref_dev(cma_dev);
3910 wait_for_completion(&cma_dev->comp);
3911}
3912
7c1eb45a 3913static void cma_remove_one(struct ib_device *device, void *client_data)
e51060f0 3914{
7c1eb45a 3915 struct cma_device *cma_dev = client_data;
e51060f0 3916
e51060f0
SH		 3917 if (!cma_dev)
3918 return;
3919
3920 mutex_lock(&lock);
3921 list_del(&cma_dev->list);
3922 mutex_unlock(&lock);
3923
3924 cma_process_remove(cma_dev);
3925 kfree(cma_dev);
3926}
3927
753f618a
NM		 3928static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3929{
3930 struct nlmsghdr *nlh;
3931 struct rdma_cm_id_stats *id_stats;
3932 struct rdma_id_private *id_priv;
3933 struct rdma_cm_id *id = NULL;
3934 struct cma_device *cma_dev;
3935 int i_dev = 0, i_id = 0;
3936
3937 /*
3938 * We export all of the IDs as a sequence of messages. Each
3939 * ID gets its own netlink message.
3940 */
3941 mutex_lock(&lock);
3942
3943 list_for_each_entry(cma_dev, &dev_list, list) {
3944 if (i_dev < cb->args[0]) {
3945 i_dev++;
3946 continue;
3947 }
3948
3949 i_id = 0;
3950 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3951 if (i_id < cb->args[1]) {
3952 i_id++;
3953 continue;
3954 }
3955
3956 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3957 sizeof *id_stats, RDMA_NL_RDMA_CM,
30dc5e63
TN		 3958 RDMA_NL_RDMA_CM_ID_STATS,
3959 NLM_F_MULTI);
753f618a
NM		 3960 if (!id_stats)
3961 goto out;
3962
3963 memset(id_stats, 0, sizeof *id_stats);
3964 id = &id_priv->id;
3965 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3966 id_stats->port_num = id->port_num;
3967 id_stats->bound_dev_if =
3968 id->route.addr.dev_addr.bound_dev_if;
3969
ce117ffa
SH		 3970 if (ibnl_put_attr(skb, nlh,
3971 rdma_addr_size(cma_src_addr(id_priv)),
3972 cma_src_addr(id_priv),
3973 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3974 goto out;
3975 if (ibnl_put_attr(skb, nlh,
3976 rdma_addr_size(cma_src_addr(id_priv)),
3977 cma_dst_addr(id_priv),
3978 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3979 goto out;
753f618a 3980
83e9502d 3981 id_stats->pid = id_priv->owner;
753f618a
NM		 3982 id_stats->port_space = id->ps;
3983 id_stats->cm_state = id_priv->state;
3984 id_stats->qp_num = id_priv->qp_num;
3985 id_stats->qp_type = id->qp_type;
3986
3987 i_id++;
3988 }
3989
3990 cb->args[1] = 0;
3991 i_dev++;
3992 }
3993
3994out:
3995 mutex_unlock(&lock);
3996 cb->args[0] = i_dev;
3997 cb->args[1] = i_id;
3998
3999 return skb->len;
4000}
4001
4002static const struct ibnl_client_cbs cma_cb_table[] = {
809d5fc9
G		 4003 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
4004 .module = THIS_MODULE },
753f618a
NM		 4005};
4006
716abb1f 4007static int __init cma_init(void)
e51060f0 4008{
5d7220e8 4009 int ret;
227b60f5 4010
c7f743a6 4011 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 4012 if (!cma_wq)
4013 return -ENOMEM;
4014
c1a0b23b 4015 ib_sa_register_client(&sa_client);
7a118df3 4016 rdma_addr_register_client(&addr_client);
dd5bdff8 4017 register_netdevice_notifier(&cma_nb);
c1a0b23b 4018
e51060f0
SH		 4019 ret = ib_register_client(&cma_client);
4020 if (ret)
4021 goto err;
753f618a
NM		 4022
4023 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
4024 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
4025
e51060f0
SH		 4026 return 0;
4027
4028err:
dd5bdff8 4029 unregister_netdevice_notifier(&cma_nb);
7a118df3 4030 rdma_addr_unregister_client(&addr_client);
c1a0b23b 4031 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 4032 destroy_workqueue(cma_wq);
4033 return ret;
4034}
4035
716abb1f 4036static void __exit cma_cleanup(void)
e51060f0 4037{
753f618a 4038 ibnl_remove_client(RDMA_NL_RDMA_CM);
e51060f0 4039 ib_unregister_client(&cma_client);
dd5bdff8 4040 unregister_netdevice_notifier(&cma_nb);
7a118df3 4041 rdma_addr_unregister_client(&addr_client);
c1a0b23b 4042 ib_sa_unregister_client(&sa_client);
e51060f0 4043 destroy_workqueue(cma_wq);
e51060f0 4044 idr_destroy(&tcp_ps);
628e5f6d 4045 idr_destroy(&udp_ps);
c8f6a362 4046 idr_destroy(&ipoib_ps);
2d2e9415 4047 idr_destroy(&ib_ps);
e51060f0
SH		 4048}
4049
4050module_init(cma_init);
4051module_exit(cma_cleanup);
Linux kernel - Deliverables
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