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RDMA/cma: fix IPv6 address resolution
[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>
e51060f0
SH		 49
50#include <rdma/rdma_cm.h>
51#include <rdma/rdma_cm_ib.h>
753f618a 52#include <rdma/rdma_netlink.h>
2e2d190c 53#include <rdma/ib.h>
e51060f0
SH		 54#include <rdma/ib_cache.h>
55#include <rdma/ib_cm.h>
56#include <rdma/ib_sa.h>
07ebafba 57#include <rdma/iw_cm.h>
e51060f0
SH		 58
59MODULE_AUTHOR("Sean Hefty");
60MODULE_DESCRIPTION("Generic RDMA CM Agent");
61MODULE_LICENSE("Dual BSD/GPL");
62
63#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 64#define CMA_MAX_CM_RETRIES 15
dcb3f974 65#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 66#define CMA_IBOE_PACKET_LIFETIME 18
e51060f0 67
2b1b5b60
SG		 68static const char * const cma_events[] = {
69 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
70 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
71 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
72 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
73 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
74 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
75 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
76 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
77 [RDMA_CM_EVENT_REJECTED] = "rejected",
78 [RDMA_CM_EVENT_ESTABLISHED] = "established",
79 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
80 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
81 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
82 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
83 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
84 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
85};
86
87const char *rdma_event_msg(enum rdma_cm_event_type event)
88{
89 size_t index = event;
90
91 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
92 cma_events[index] : "unrecognized event";
93}
94EXPORT_SYMBOL(rdma_event_msg);
95
e51060f0
SH		 96static void cma_add_one(struct ib_device *device);
97static void cma_remove_one(struct ib_device *device);
98
99static struct ib_client cma_client = {
100 .name = "cma",
101 .add = cma_add_one,
102 .remove = cma_remove_one
103};
104
c1a0b23b 105static struct ib_sa_client sa_client;
7a118df3 106static struct rdma_addr_client addr_client;
e51060f0
SH		 107static LIST_HEAD(dev_list);
108static LIST_HEAD(listen_any_list);
109static DEFINE_MUTEX(lock);
110static struct workqueue_struct *cma_wq;
e51060f0 111static DEFINE_IDR(tcp_ps);
628e5f6d 112static DEFINE_IDR(udp_ps);
c8f6a362 113static DEFINE_IDR(ipoib_ps);
2d2e9415 114static DEFINE_IDR(ib_ps);
e51060f0
SH		 115
116struct cma_device {
117 struct list_head list;
118 struct ib_device *device;
e51060f0
SH		 119 struct completion comp;
120 atomic_t refcount;
121 struct list_head id_list;
122};
123
e51060f0
SH		 124struct rdma_bind_list {
125 struct idr *ps;
126 struct hlist_head owners;
127 unsigned short port;
128};
129
68602120
SH		 130enum {
131 CMA_OPTION_AFONLY,
132};
133
e51060f0
SH		 134/*
135 * Device removal can occur at anytime, so we need extra handling to
136 * serialize notifying the user of device removal with other callbacks.
137 * We do this by disabling removal notification while a callback is in process,
138 * and reporting it after the callback completes.
139 */
140struct rdma_id_private {
141 struct rdma_cm_id id;
142
143 struct rdma_bind_list *bind_list;
144 struct hlist_node node;
d02d1f53
SH		 145 struct list_head list; /* listen_any_list or cma_device.list */
146 struct list_head listen_list; /* per device listens */
e51060f0 147 struct cma_device *cma_dev;
c8f6a362 148 struct list_head mc_list;
e51060f0 149
d02d1f53 150 int internal_id;
550e5ca7 151 enum rdma_cm_state state;
e51060f0 152 spinlock_t lock;
c5483388
SH		 153 struct mutex qp_mutex;
154
e51060f0
SH		 155 struct completion comp;
156 atomic_t refcount;
de910bd9 157 struct mutex handler_mutex;
e51060f0
SH		 158
159 int backlog;
160 int timeout_ms;
161 struct ib_sa_query *query;
162 int query_id;
163 union {
164 struct ib_cm_id *ib;
07ebafba 165 struct iw_cm_id *iw;
e51060f0
SH		 166 } cm_id;
167
168 u32 seq_num;
c8f6a362 169 u32 qkey;
e51060f0 170 u32 qp_num;
83e9502d 171 pid_t owner;
68602120 172 u32 options;
e51060f0 173 u8 srq;
a81c994d 174 u8 tos;
a9bb7912 175 u8 reuseaddr;
5b0ec991 176 u8 afonly;
e51060f0
SH		 177};
178
c8f6a362
SH		 179struct cma_multicast {
180 struct rdma_id_private *id_priv;
181 union {
182 struct ib_sa_multicast *ib;
183 } multicast;
184 struct list_head list;
185 void *context;
3f446754 186 struct sockaddr_storage addr;
3c86aa70 187 struct kref mcref;
c8f6a362
SH		 188};
189
e51060f0
SH		 190struct cma_work {
191 struct work_struct work;
192 struct rdma_id_private *id;
550e5ca7
NM		 193 enum rdma_cm_state old_state;
194 enum rdma_cm_state new_state;
e51060f0
SH		 195 struct rdma_cm_event event;
196};
197
dd5bdff8
OG		 198struct cma_ndev_work {
199 struct work_struct work;
200 struct rdma_id_private *id;
201 struct rdma_cm_event event;
202};
203
3c86aa70
EC		 204struct iboe_mcast_work {
205 struct work_struct work;
206 struct rdma_id_private *id;
207 struct cma_multicast *mc;
208};
209
e51060f0
SH		 210union cma_ip_addr {
211 struct in6_addr ip6;
212 struct {
1b90c137
AV		 213 __be32 pad[3];
214 __be32 addr;
e51060f0
SH		 215 } ip4;
216};
217
218struct cma_hdr {
219 u8 cma_version;
220 u8 ip_version; /* IP version: 7:4 */
1b90c137 221 __be16 port;
e51060f0
SH		 222 union cma_ip_addr src_addr;
223 union cma_ip_addr dst_addr;
224};
225
e51060f0 226#define CMA_VERSION 0x00
e51060f0 227
550e5ca7 228static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
e51060f0
SH		 229{
230 unsigned long flags;
231 int ret;
232
233 spin_lock_irqsave(&id_priv->lock, flags);
234 ret = (id_priv->state == comp);
235 spin_unlock_irqrestore(&id_priv->lock, flags);
236 return ret;
237}
238
239static int cma_comp_exch(struct rdma_id_private *id_priv,
550e5ca7 240 enum rdma_cm_state comp, enum rdma_cm_state exch)
e51060f0
SH		 241{
242 unsigned long flags;
243 int ret;
244
245 spin_lock_irqsave(&id_priv->lock, flags);
246 if ((ret = (id_priv->state == comp)))
247 id_priv->state = exch;
248 spin_unlock_irqrestore(&id_priv->lock, flags);
249 return ret;
250}
251
550e5ca7
NM		 252static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
253 enum rdma_cm_state exch)
e51060f0
SH		 254{
255 unsigned long flags;
550e5ca7 256 enum rdma_cm_state old;
e51060f0
SH		 257
258 spin_lock_irqsave(&id_priv->lock, flags);
259 old = id_priv->state;
260 id_priv->state = exch;
261 spin_unlock_irqrestore(&id_priv->lock, flags);
262 return old;
263}
264
265static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
266{
267 return hdr->ip_version >> 4;
268}
269
270static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
271{
272 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
273}
274
e51060f0
SH		 275static void cma_attach_to_dev(struct rdma_id_private *id_priv,
276 struct cma_device *cma_dev)
277{
278 atomic_inc(&cma_dev->refcount);
279 id_priv->cma_dev = cma_dev;
280 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 281 id_priv->id.route.addr.dev_addr.transport =
282 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0
SH		 283 list_add_tail(&id_priv->list, &cma_dev->id_list);
284}
285
286static inline void cma_deref_dev(struct cma_device *cma_dev)
287{
288 if (atomic_dec_and_test(&cma_dev->refcount))
289 complete(&cma_dev->comp);
290}
291
3c86aa70
EC		 292static inline void release_mc(struct kref *kref)
293{
294 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
295
296 kfree(mc->multicast.ib);
297 kfree(mc);
298}
299
a396d43a 300static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 301{
a396d43a 302 mutex_lock(&lock);
e51060f0
SH		 303 list_del(&id_priv->list);
304 cma_deref_dev(id_priv->cma_dev);
305 id_priv->cma_dev = NULL;
a396d43a 306 mutex_unlock(&lock);
e51060f0
SH		 307}
308
f4753834
SH		 309static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
310{
311 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
312}
313
314static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
315{
316 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
317}
318
319static inline unsigned short cma_family(struct rdma_id_private *id_priv)
320{
321 return id_priv->id.route.addr.src_addr.ss_family;
322}
323
5c438135 324static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
c8f6a362
SH		 325{
326 struct ib_sa_mcmember_rec rec;
327 int ret = 0;
328
5c438135
SH		 329 if (id_priv->qkey) {
330 if (qkey && id_priv->qkey != qkey)
331 return -EINVAL;
d2ca39f2 332 return 0;
5c438135
SH		 333 }
334
335 if (qkey) {
336 id_priv->qkey = qkey;
337 return 0;
338 }
d2ca39f2
YE		 339
340 switch (id_priv->id.ps) {
c8f6a362 341 case RDMA_PS_UDP:
5c438135 342 case RDMA_PS_IB:
d2ca39f2 343 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 344 break;
345 case RDMA_PS_IPOIB:
d2ca39f2
YE		 346 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
347 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
348 id_priv->id.port_num, &rec.mgid,
349 &rec);
350 if (!ret)
351 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 352 break;
353 default:
354 break;
355 }
356 return ret;
357}
358
680f920a
SH		 359static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
360{
361 dev_addr->dev_type = ARPHRD_INFINIBAND;
362 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
363 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
364}
365
366static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
367{
368 int ret;
369
370 if (addr->sa_family != AF_IB) {
dd5f03be 371 ret = rdma_translate_ip(addr, dev_addr, NULL);
680f920a
SH		 372 } else {
373 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
374 ret = 0;
375 }
376
377 return ret;
378}
379
7c11147d
MW		 380static inline int cma_validate_port(struct ib_device *device, u8 port,
381 union ib_gid *gid, int dev_type)
382{
383 u8 found_port;
384 int ret = -ENODEV;
385
386 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
387 return ret;
388
389 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
390 return ret;
391
392 ret = ib_find_cached_gid(device, gid, &found_port, NULL);
393 if (port != found_port)
394 return -ENODEV;
395
396 return ret;
397}
398
be9130cc
DL		 399static int cma_acquire_dev(struct rdma_id_private *id_priv,
400 struct rdma_id_private *listen_id_priv)
e51060f0 401{
c8f6a362 402 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 403 struct cma_device *cma_dev;
7c11147d 404 union ib_gid gid, iboe_gid, *gidp;
e51060f0 405 int ret = -ENODEV;
7c11147d 406 u8 port;
e51060f0 407
7c11147d 408 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
2efdd6a0
MS		 409 id_priv->id.ps == RDMA_PS_IPOIB)
410 return -EINVAL;
411
a396d43a 412 mutex_lock(&lock);
7b85627b
MS		 413 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
414 &iboe_gid);
415
3c86aa70
EC		 416 memcpy(&gid, dev_addr->src_dev_addr +
417 rdma_addr_gid_offset(dev_addr), sizeof gid);
7c11147d
MW		 418
419 if (listen_id_priv) {
be9130cc
DL		 420 cma_dev = listen_id_priv->cma_dev;
421 port = listen_id_priv->id.port_num;
5d9fb044 422 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d 423 &iboe_gid : &gid;
be9130cc 424
7c11147d
MW		 425 ret = cma_validate_port(cma_dev->device, port, gidp,
426 dev_addr->dev_type);
427 if (!ret) {
428 id_priv->id.port_num = port;
be9130cc
DL		 429 goto out;
430 }
431 }
7c11147d 432
e51060f0 433 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70 434 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
be9130cc
DL		 435 if (listen_id_priv &&
436 listen_id_priv->cma_dev == cma_dev &&
437 listen_id_priv->id.port_num == port)
438 continue;
7c11147d 439
5d9fb044 440 gidp = rdma_protocol_roce(cma_dev->device, port) ?
7c11147d
MW		 441 &iboe_gid : &gid;
442
443 ret = cma_validate_port(cma_dev->device, port, gidp,
444 dev_addr->dev_type);
445 if (!ret) {
446 id_priv->id.port_num = port;
447 goto out;
3c86aa70 448 }
e51060f0
SH		 449 }
450 }
3c86aa70
EC		 451
452out:
453 if (!ret)
454 cma_attach_to_dev(id_priv, cma_dev);
455
a396d43a 456 mutex_unlock(&lock);
e51060f0
SH		 457 return ret;
458}
459
f17df3b0
SH		 460/*
461 * Select the source IB device and address to reach the destination IB address.
462 */
463static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
464{
465 struct cma_device *cma_dev, *cur_dev;
466 struct sockaddr_ib *addr;
467 union ib_gid gid, sgid, *dgid;
468 u16 pkey, index;
8fb488d7 469 u8 p;
f17df3b0
SH		 470 int i;
471
472 cma_dev = NULL;
473 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
474 dgid = (union ib_gid *) &addr->sib_addr;
475 pkey = ntohs(addr->sib_pkey);
476
477 list_for_each_entry(cur_dev, &dev_list, list) {
f17df3b0 478 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
30a74ef4 479 if (!rdma_cap_af_ib(cur_dev->device, p))
fef60902
MW		 480 continue;
481
f17df3b0
SH		 482 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
483 continue;
484
485 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
486 if (!memcmp(&gid, dgid, sizeof(gid))) {
487 cma_dev = cur_dev;
488 sgid = gid;
8fb488d7 489 id_priv->id.port_num = p;
f17df3b0
SH		 490 goto found;
491 }
492
493 if (!cma_dev && (gid.global.subnet_prefix ==
494 dgid->global.subnet_prefix)) {
495 cma_dev = cur_dev;
496 sgid = gid;
8fb488d7 497 id_priv->id.port_num = p;
f17df3b0
SH		 498 }
499 }
500 }
501 }
502
503 if (!cma_dev)
504 return -ENODEV;
505
506found:
507 cma_attach_to_dev(id_priv, cma_dev);
f17df3b0
SH		 508 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
509 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
510 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
511 return 0;
512}
513
e51060f0
SH		 514static void cma_deref_id(struct rdma_id_private *id_priv)
515{
516 if (atomic_dec_and_test(&id_priv->refcount))
517 complete(&id_priv->comp);
518}
519
de910bd9 520static int cma_disable_callback(struct rdma_id_private *id_priv,
550e5ca7 521 enum rdma_cm_state state)
8aa08602 522{
de910bd9
OG		 523 mutex_lock(&id_priv->handler_mutex);
524 if (id_priv->state != state) {
525 mutex_unlock(&id_priv->handler_mutex);
526 return -EINVAL;
527 }
528 return 0;
e51060f0
SH		 529}
530
531struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
b26f9b99
SH		 532 void *context, enum rdma_port_space ps,
533 enum ib_qp_type qp_type)
e51060f0
SH		 534{
535 struct rdma_id_private *id_priv;
536
537 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
538 if (!id_priv)
539 return ERR_PTR(-ENOMEM);
540
83e9502d 541 id_priv->owner = task_pid_nr(current);
550e5ca7 542 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 543 id_priv->id.context = context;
544 id_priv->id.event_handler = event_handler;
545 id_priv->id.ps = ps;
b26f9b99 546 id_priv->id.qp_type = qp_type;
e51060f0 547 spin_lock_init(&id_priv->lock);
c5483388 548 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 549 init_completion(&id_priv->comp);
550 atomic_set(&id_priv->refcount, 1);
de910bd9 551 mutex_init(&id_priv->handler_mutex);
e51060f0 552 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 553 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 554 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
555
556 return &id_priv->id;
557}
558EXPORT_SYMBOL(rdma_create_id);
559
c8f6a362 560static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 561{
562 struct ib_qp_attr qp_attr;
c8f6a362 563 int qp_attr_mask, ret;
e51060f0 564
c8f6a362
SH		 565 qp_attr.qp_state = IB_QPS_INIT;
566 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 567 if (ret)
568 return ret;
569
c8f6a362
SH		 570 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
571 if (ret)
572 return ret;
573
574 qp_attr.qp_state = IB_QPS_RTR;
575 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
576 if (ret)
577 return ret;
578
579 qp_attr.qp_state = IB_QPS_RTS;
580 qp_attr.sq_psn = 0;
581 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
582
583 return ret;
e51060f0
SH		 584}
585
c8f6a362 586static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 587{
588 struct ib_qp_attr qp_attr;
c8f6a362 589 int qp_attr_mask, ret;
07ebafba
TT		 590
591 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 592 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
593 if (ret)
594 return ret;
07ebafba 595
c8f6a362 596 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 597}
598
e51060f0
SH		 599int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
600 struct ib_qp_init_attr *qp_init_attr)
601{
602 struct rdma_id_private *id_priv;
603 struct ib_qp *qp;
604 int ret;
605
606 id_priv = container_of(id, struct rdma_id_private, id);
607 if (id->device != pd->device)
608 return -EINVAL;
609
610 qp = ib_create_qp(pd, qp_init_attr);
611 if (IS_ERR(qp))
612 return PTR_ERR(qp);
613
b26f9b99 614 if (id->qp_type == IB_QPT_UD)
c8f6a362
SH		 615 ret = cma_init_ud_qp(id_priv, qp);
616 else
617 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 618 if (ret)
619 goto err;
620
621 id->qp = qp;
622 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 623 id_priv->srq = (qp->srq != NULL);
624 return 0;
625err:
626 ib_destroy_qp(qp);
627 return ret;
628}
629EXPORT_SYMBOL(rdma_create_qp);
630
631void rdma_destroy_qp(struct rdma_cm_id *id)
632{
c5483388
SH		 633 struct rdma_id_private *id_priv;
634
635 id_priv = container_of(id, struct rdma_id_private, id);
636 mutex_lock(&id_priv->qp_mutex);
637 ib_destroy_qp(id_priv->id.qp);
638 id_priv->id.qp = NULL;
639 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 640}
641EXPORT_SYMBOL(rdma_destroy_qp);
642
5851bb89
SH		 643static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
644 struct rdma_conn_param *conn_param)
e51060f0
SH		 645{
646 struct ib_qp_attr qp_attr;
647 int qp_attr_mask, ret;
dd5f03be 648 union ib_gid sgid;
e51060f0 649
c5483388
SH		 650 mutex_lock(&id_priv->qp_mutex);
651 if (!id_priv->id.qp) {
652 ret = 0;
653 goto out;
654 }
e51060f0
SH		 655
656 /* Need to update QP attributes from default values. */
657 qp_attr.qp_state = IB_QPS_INIT;
c5483388 658 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 659 if (ret)
c5483388 660 goto out;
e51060f0 661
c5483388 662 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 663 if (ret)
c5483388 664 goto out;
e51060f0
SH		 665
666 qp_attr.qp_state = IB_QPS_RTR;
c5483388 667 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 668 if (ret)
c5483388 669 goto out;
e51060f0 670
dd5f03be
MB		 671 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
672 qp_attr.ah_attr.grh.sgid_index, &sgid);
673 if (ret)
674 goto out;
675
fef60902
MW		 676 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
677
5d9fb044 678 if (rdma_protocol_roce(id_priv->id.device, id_priv->id.port_num)) {
dd5f03be
MB		 679 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr.smac, NULL);
680
681 if (ret)
682 goto out;
683 }
5851bb89
SH		 684 if (conn_param)
685 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 686 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
687out:
688 mutex_unlock(&id_priv->qp_mutex);
689 return ret;
e51060f0
SH		 690}
691
5851bb89
SH		 692static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
693 struct rdma_conn_param *conn_param)
e51060f0
SH		 694{
695 struct ib_qp_attr qp_attr;
696 int qp_attr_mask, ret;
697
c5483388
SH		 698 mutex_lock(&id_priv->qp_mutex);
699 if (!id_priv->id.qp) {
700 ret = 0;
701 goto out;
702 }
e51060f0
SH		 703
704 qp_attr.qp_state = IB_QPS_RTS;
c5483388 705 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 706 if (ret)
c5483388 707 goto out;
e51060f0 708
5851bb89
SH		 709 if (conn_param)
710 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 711 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
712out:
713 mutex_unlock(&id_priv->qp_mutex);
714 return ret;
e51060f0
SH		 715}
716
c5483388 717static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 718{
719 struct ib_qp_attr qp_attr;
c5483388 720 int ret;
e51060f0 721
c5483388
SH		 722 mutex_lock(&id_priv->qp_mutex);
723 if (!id_priv->id.qp) {
724 ret = 0;
725 goto out;
726 }
e51060f0
SH		 727
728 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 729 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
730out:
731 mutex_unlock(&id_priv->qp_mutex);
732 return ret;
e51060f0
SH		 733}
734
c8f6a362
SH		 735static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
736 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
737{
738 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
739 int ret;
3c86aa70
EC		 740 u16 pkey;
741
227128fc 742 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
3c86aa70 743 pkey = 0xffff;
fef60902
MW		 744 else
745 pkey = ib_addr_get_pkey(dev_addr);
c8f6a362
SH		 746
747 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 748 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 749 if (ret)
750 return ret;
751
752 qp_attr->port_num = id_priv->id.port_num;
753 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
754
b26f9b99 755 if (id_priv->id.qp_type == IB_QPT_UD) {
5c438135 756 ret = cma_set_qkey(id_priv, 0);
d2ca39f2
YE		 757 if (ret)
758 return ret;
759
c8f6a362
SH		 760 qp_attr->qkey = id_priv->qkey;
761 *qp_attr_mask |= IB_QP_QKEY;
762 } else {
763 qp_attr->qp_access_flags = 0;
764 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
765 }
766 return 0;
767}
768
e51060f0
SH		 769int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
770 int *qp_attr_mask)
771{
772 struct rdma_id_private *id_priv;
c8f6a362 773 int ret = 0;
e51060f0
SH		 774
775 id_priv = container_of(id, struct rdma_id_private, id);
72219cea 776 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 777 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 778 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
779 else
780 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
781 qp_attr_mask);
dd5f03be 782
e51060f0
SH		 783 if (qp_attr->qp_state == IB_QPS_RTR)
784 qp_attr->rq_psn = id_priv->seq_num;
04215330 785 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
c8f6a362 786 if (!id_priv->cm_id.iw) {
8f076531 787 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 788 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
789 } else
790 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
791 qp_attr_mask);
21655afc 792 } else
e51060f0 793 ret = -ENOSYS;
e51060f0
SH		 794
795 return ret;
796}
797EXPORT_SYMBOL(rdma_init_qp_attr);
798
799static inline int cma_zero_addr(struct sockaddr *addr)
800{
2e2d190c
SH		 801 switch (addr->sa_family) {
802 case AF_INET:
803 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
804 case AF_INET6:
805 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
806 case AF_IB:
807 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
808 default:
809 return 0;
e51060f0
SH		 810 }
811}
812
813static inline int cma_loopback_addr(struct sockaddr *addr)
814{
2e2d190c
SH		 815 switch (addr->sa_family) {
816 case AF_INET:
817 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
818 case AF_INET6:
819 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
820 case AF_IB:
821 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
822 default:
823 return 0;
824 }
e51060f0
SH		 825}
826
827static inline int cma_any_addr(struct sockaddr *addr)
828{
829 return cma_zero_addr(addr) || cma_loopback_addr(addr);
830}
831
43b752da
HS		 832static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
833{
834 if (src->sa_family != dst->sa_family)
835 return -1;
836
837 switch (src->sa_family) {
838 case AF_INET:
839 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
840 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2e2d190c 841 case AF_INET6:
43b752da
HS		 842 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
843 &((struct sockaddr_in6 *) dst)->sin6_addr);
2e2d190c
SH		 844 default:
845 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
846 &((struct sockaddr_ib *) dst)->sib_addr);
43b752da
HS		 847 }
848}
849
58afdcb7 850static __be16 cma_port(struct sockaddr *addr)
628e5f6d 851{
58afdcb7
SH		 852 struct sockaddr_ib *sib;
853
854 switch (addr->sa_family) {
855 case AF_INET:
628e5f6d 856 return ((struct sockaddr_in *) addr)->sin_port;
58afdcb7 857 case AF_INET6:
628e5f6d 858 return ((struct sockaddr_in6 *) addr)->sin6_port;
58afdcb7
SH		 859 case AF_IB:
860 sib = (struct sockaddr_ib *) addr;
861 return htons((u16) (be64_to_cpu(sib->sib_sid) &
862 be64_to_cpu(sib->sib_sid_mask)));
863 default:
864 return 0;
865 }
628e5f6d
SH		 866}
867
e51060f0
SH		 868static inline int cma_any_port(struct sockaddr *addr)
869{
628e5f6d 870 return !cma_port(addr);
e51060f0
SH		 871}
872
fbaa1a6d
SH		 873static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
874 struct ib_sa_path_rec *path)
e51060f0 875{
fbaa1a6d
SH		 876 struct sockaddr_ib *listen_ib, *ib;
877
878 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
879 ib = (struct sockaddr_ib *) &id->route.addr.src_addr;
880 ib->sib_family = listen_ib->sib_family;
c07678bb
MF		 881 if (path) {
882 ib->sib_pkey = path->pkey;
883 ib->sib_flowinfo = path->flow_label;
884 memcpy(&ib->sib_addr, &path->sgid, 16);
885 } else {
886 ib->sib_pkey = listen_ib->sib_pkey;
887 ib->sib_flowinfo = listen_ib->sib_flowinfo;
888 ib->sib_addr = listen_ib->sib_addr;
889 }
fbaa1a6d
SH		 890 ib->sib_sid = listen_ib->sib_sid;
891 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
892 ib->sib_scope_id = listen_ib->sib_scope_id;
893
c07678bb
MF		 894 if (path) {
895 ib = (struct sockaddr_ib *) &id->route.addr.dst_addr;
896 ib->sib_family = listen_ib->sib_family;
897 ib->sib_pkey = path->pkey;
898 ib->sib_flowinfo = path->flow_label;
899 memcpy(&ib->sib_addr, &path->dgid, 16);
900 }
fbaa1a6d 901}
e51060f0 902
28521440
JG		 903static __be16 ss_get_port(const struct sockaddr_storage *ss)
904{
905 if (ss->ss_family == AF_INET)
906 return ((struct sockaddr_in *)ss)->sin_port;
907 else if (ss->ss_family == AF_INET6)
908 return ((struct sockaddr_in6 *)ss)->sin6_port;
909 BUG();
910}
911
fbaa1a6d
SH		 912static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
913 struct cma_hdr *hdr)
914{
28521440 915 struct sockaddr_in *ip4;
e51060f0 916
fbaa1a6d 917 ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
28521440 918 ip4->sin_family = AF_INET;
fbaa1a6d 919 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
28521440 920 ip4->sin_port = ss_get_port(&listen_id->route.addr.src_addr);
fbaa1a6d
SH		 921
922 ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
28521440 923 ip4->sin_family = AF_INET;
fbaa1a6d
SH		 924 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
925 ip4->sin_port = hdr->port;
e51060f0
SH		 926}
927
fbaa1a6d
SH		 928static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
929 struct cma_hdr *hdr)
e51060f0 930{
28521440 931 struct sockaddr_in6 *ip6;
e51060f0 932
fbaa1a6d 933 ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
28521440 934 ip6->sin6_family = AF_INET6;
fbaa1a6d 935 ip6->sin6_addr = hdr->dst_addr.ip6;
28521440 936 ip6->sin6_port = ss_get_port(&listen_id->route.addr.src_addr);
fbaa1a6d
SH		 937
938 ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
28521440 939 ip6->sin6_family = AF_INET6;
fbaa1a6d
SH		 940 ip6->sin6_addr = hdr->src_addr.ip6;
941 ip6->sin6_port = hdr->port;
942}
943
944static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
945 struct ib_cm_event *ib_event)
946{
947 struct cma_hdr *hdr;
948
c07678bb
MF		 949 if (listen_id->route.addr.src_addr.ss_family == AF_IB) {
950 if (ib_event->event == IB_CM_REQ_RECEIVED)
951 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path);
952 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
953 cma_save_ib_info(id, listen_id, NULL);
fbaa1a6d
SH		 954 return 0;
955 }
956
957 hdr = ib_event->private_data;
958 if (hdr->cma_version != CMA_VERSION)
959 return -EINVAL;
960
961 switch (cma_get_ip_ver(hdr)) {
e51060f0 962 case 4:
fbaa1a6d 963 cma_save_ip4_info(id, listen_id, hdr);
e51060f0
SH		 964 break;
965 case 6:
fbaa1a6d 966 cma_save_ip6_info(id, listen_id, hdr);
e51060f0
SH		 967 break;
968 default:
fbaa1a6d 969 return -EINVAL;
e51060f0 970 }
fbaa1a6d 971 return 0;
e51060f0
SH		 972}
973
e8160e15 974static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
e51060f0 975{
e8160e15 976 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
e51060f0
SH		 977}
978
e51060f0
SH		 979static void cma_cancel_route(struct rdma_id_private *id_priv)
980{
fe53ba2f 981 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
e51060f0
SH		 982 if (id_priv->query)
983 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
e51060f0
SH		 984 }
985}
986
e51060f0
SH		 987static void cma_cancel_listens(struct rdma_id_private *id_priv)
988{
989 struct rdma_id_private *dev_id_priv;
990
d02d1f53
SH		 991 /*
992 * Remove from listen_any_list to prevent added devices from spawning
993 * additional listen requests.
994 */
e51060f0
SH		 995 mutex_lock(&lock);
996 list_del(&id_priv->list);
997
998 while (!list_empty(&id_priv->listen_list)) {
999 dev_id_priv = list_entry(id_priv->listen_list.next,
1000 struct rdma_id_private, listen_list);
d02d1f53
SH		 1001 /* sync with device removal to avoid duplicate destruction */
1002 list_del_init(&dev_id_priv->list);
1003 list_del(&dev_id_priv->listen_list);
1004 mutex_unlock(&lock);
1005
1006 rdma_destroy_id(&dev_id_priv->id);
1007 mutex_lock(&lock);
e51060f0
SH		 1008 }
1009 mutex_unlock(&lock);
1010}
1011
1012static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 1013 enum rdma_cm_state state)
e51060f0
SH		 1014{
1015 switch (state) {
550e5ca7 1016 case RDMA_CM_ADDR_QUERY:
e51060f0
SH		 1017 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1018 break;
550e5ca7 1019 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 1020 cma_cancel_route(id_priv);
1021 break;
550e5ca7 1022 case RDMA_CM_LISTEN:
f4753834 1023 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
e51060f0
SH		 1024 cma_cancel_listens(id_priv);
1025 break;
1026 default:
1027 break;
1028 }
1029}
1030
1031static void cma_release_port(struct rdma_id_private *id_priv)
1032{
1033 struct rdma_bind_list *bind_list = id_priv->bind_list;
1034
1035 if (!bind_list)
1036 return;
1037
1038 mutex_lock(&lock);
1039 hlist_del(&id_priv->node);
1040 if (hlist_empty(&bind_list->owners)) {
1041 idr_remove(bind_list->ps, bind_list->port);
1042 kfree(bind_list);
1043 }
1044 mutex_unlock(&lock);
1045}
1046
c8f6a362
SH		 1047static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1048{
1049 struct cma_multicast *mc;
1050
1051 while (!list_empty(&id_priv->mc_list)) {
1052 mc = container_of(id_priv->mc_list.next,
1053 struct cma_multicast, list);
1054 list_del(&mc->list);
a31ad3b0 1055 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
5c9a5282 1056 id_priv->id.port_num)) {
3c86aa70
EC		 1057 ib_sa_free_multicast(mc->multicast.ib);
1058 kfree(mc);
5c9a5282 1059 } else
3c86aa70 1060 kref_put(&mc->mcref, release_mc);
c8f6a362
SH		 1061 }
1062}
1063
e51060f0
SH		 1064void rdma_destroy_id(struct rdma_cm_id *id)
1065{
1066 struct rdma_id_private *id_priv;
550e5ca7 1067 enum rdma_cm_state state;
e51060f0
SH		 1068
1069 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1070 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1071 cma_cancel_operation(id_priv, state);
1072
a396d43a
SH		 1073 /*
1074 * Wait for any active callback to finish. New callbacks will find
1075 * the id_priv state set to destroying and abort.
1076 */
1077 mutex_lock(&id_priv->handler_mutex);
1078 mutex_unlock(&id_priv->handler_mutex);
1079
e51060f0 1080 if (id_priv->cma_dev) {
72219cea 1081 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
0c9361fc 1082 if (id_priv->cm_id.ib)
e51060f0 1083 ib_destroy_cm_id(id_priv->cm_id.ib);
04215330 1084 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
0c9361fc 1085 if (id_priv->cm_id.iw)
07ebafba 1086 iw_destroy_cm_id(id_priv->cm_id.iw);
e51060f0 1087 }
c8f6a362 1088 cma_leave_mc_groups(id_priv);
a396d43a 1089 cma_release_dev(id_priv);
e51060f0
SH		 1090 }
1091
1092 cma_release_port(id_priv);
1093 cma_deref_id(id_priv);
1094 wait_for_completion(&id_priv->comp);
1095
d02d1f53
SH		 1096 if (id_priv->internal_id)
1097 cma_deref_id(id_priv->id.context);
1098
e51060f0
SH		 1099 kfree(id_priv->id.route.path_rec);
1100 kfree(id_priv);
1101}
1102EXPORT_SYMBOL(rdma_destroy_id);
1103
1104static int cma_rep_recv(struct rdma_id_private *id_priv)
1105{
1106 int ret;
1107
5851bb89 1108 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 1109 if (ret)
1110 goto reject;
1111
5851bb89 1112 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 1113 if (ret)
1114 goto reject;
1115
1116 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1117 if (ret)
1118 goto reject;
1119
1120 return 0;
1121reject:
c5483388 1122 cma_modify_qp_err(id_priv);
e51060f0
SH		 1123 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1124 NULL, 0, NULL, 0);
1125 return ret;
1126}
1127
a1b1b61f
SH		 1128static void cma_set_rep_event_data(struct rdma_cm_event *event,
1129 struct ib_cm_rep_event_param *rep_data,
1130 void *private_data)
1131{
1132 event->param.conn.private_data = private_data;
1133 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1134 event->param.conn.responder_resources = rep_data->responder_resources;
1135 event->param.conn.initiator_depth = rep_data->initiator_depth;
1136 event->param.conn.flow_control = rep_data->flow_control;
1137 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1138 event->param.conn.srq = rep_data->srq;
1139 event->param.conn.qp_num = rep_data->remote_qpn;
1140}
1141
e51060f0
SH		 1142static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1143{
1144 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 1145 struct rdma_cm_event event;
1146 int ret = 0;
e51060f0 1147
38ca83a5 1148 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1149 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
38ca83a5 1150 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1151 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
8aa08602 1152 return 0;
e51060f0 1153
a1b1b61f 1154 memset(&event, 0, sizeof event);
e51060f0
SH		 1155 switch (ib_event->event) {
1156 case IB_CM_REQ_ERROR:
1157 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1158 event.event = RDMA_CM_EVENT_UNREACHABLE;
1159 event.status = -ETIMEDOUT;
e51060f0
SH		 1160 break;
1161 case IB_CM_REP_RECEIVED:
01602f11 1162 if (id_priv->id.qp) {
a1b1b61f
SH		 1163 event.status = cma_rep_recv(id_priv);
1164 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1165 RDMA_CM_EVENT_ESTABLISHED;
01602f11 1166 } else {
a1b1b61f 1167 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
01602f11 1168 }
a1b1b61f
SH		 1169 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1170 ib_event->private_data);
e51060f0
SH		 1171 break;
1172 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1173 case IB_CM_USER_ESTABLISHED:
1174 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1175 break;
1176 case IB_CM_DREQ_ERROR:
a1b1b61f 1177 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1178 case IB_CM_DREQ_RECEIVED:
1179 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 1180 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1181 RDMA_CM_DISCONNECT))
e51060f0 1182 goto out;
a1b1b61f 1183 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1184 break;
1185 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1186 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1187 break;
e51060f0
SH		 1188 case IB_CM_MRA_RECEIVED:
1189 /* ignore event */
1190 goto out;
1191 case IB_CM_REJ_RECEIVED:
c5483388 1192 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1193 event.status = ib_event->param.rej_rcvd.reason;
1194 event.event = RDMA_CM_EVENT_REJECTED;
1195 event.param.conn.private_data = ib_event->private_data;
1196 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1197 break;
1198 default:
468f2239 1199 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1200 ib_event->event);
1201 goto out;
1202 }
1203
a1b1b61f 1204 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1205 if (ret) {
1206 /* Destroy the CM ID by returning a non-zero value. */
1207 id_priv->cm_id.ib = NULL;
550e5ca7 1208 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1209 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1210 rdma_destroy_id(&id_priv->id);
1211 return ret;
1212 }
1213out:
de910bd9 1214 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1215 return ret;
1216}
1217
628e5f6d
SH		 1218static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1219 struct ib_cm_event *ib_event)
e51060f0
SH		 1220{
1221 struct rdma_id_private *id_priv;
1222 struct rdma_cm_id *id;
1223 struct rdma_route *rt;
64c5e613 1224 int ret;
e51060f0
SH		 1225
1226 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1227 listen_id->ps, ib_event->param.req_rcvd.qp_type);
e51060f0 1228 if (IS_ERR(id))
0c9361fc 1229 return NULL;
3f168d2b 1230
f4753834 1231 id_priv = container_of(id, struct rdma_id_private, id);
fbaa1a6d
SH		 1232 if (cma_save_net_info(id, listen_id, ib_event))
1233 goto err;
e51060f0
SH		 1234
1235 rt = &id->route;
1236 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1237 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1238 GFP_KERNEL);
e51060f0 1239 if (!rt->path_rec)
0c9361fc 1240 goto err;
e51060f0 1241
e51060f0
SH		 1242 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1243 if (rt->num_paths == 2)
1244 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1245
f4753834 1246 if (cma_any_addr(cma_src_addr(id_priv))) {
6f8372b6
SH		 1247 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1248 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
46ea5061 1249 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
6f8372b6 1250 } else {
f4753834 1251 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
6f8372b6 1252 if (ret)
0c9361fc 1253 goto err;
6f8372b6
SH		 1254 }
1255 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0 1256
550e5ca7 1257 id_priv->state = RDMA_CM_CONNECT;
e51060f0 1258 return id_priv;
3f168d2b 1259
3f168d2b 1260err:
0c9361fc 1261 rdma_destroy_id(id);
e51060f0
SH		 1262 return NULL;
1263}
1264
628e5f6d
SH		 1265static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1266 struct ib_cm_event *ib_event)
1267{
1268 struct rdma_id_private *id_priv;
1269 struct rdma_cm_id *id;
628e5f6d
SH		 1270 int ret;
1271
1272 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1273 listen_id->ps, IB_QPT_UD);
628e5f6d
SH		 1274 if (IS_ERR(id))
1275 return NULL;
1276
f4753834 1277 id_priv = container_of(id, struct rdma_id_private, id);
fbaa1a6d 1278 if (cma_save_net_info(id, listen_id, ib_event))
628e5f6d
SH		 1279 goto err;
1280
6f8372b6 1281 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
f4753834 1282 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr);
6f8372b6
SH		 1283 if (ret)
1284 goto err;
1285 }
628e5f6d 1286
550e5ca7 1287 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 1288 return id_priv;
1289err:
1290 rdma_destroy_id(id);
1291 return NULL;
1292}
1293
a1b1b61f
SH		 1294static void cma_set_req_event_data(struct rdma_cm_event *event,
1295 struct ib_cm_req_event_param *req_data,
1296 void *private_data, int offset)
1297{
1298 event->param.conn.private_data = private_data + offset;
1299 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1300 event->param.conn.responder_resources = req_data->responder_resources;
1301 event->param.conn.initiator_depth = req_data->initiator_depth;
1302 event->param.conn.flow_control = req_data->flow_control;
1303 event->param.conn.retry_count = req_data->retry_count;
1304 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1305 event->param.conn.srq = req_data->srq;
1306 event->param.conn.qp_num = req_data->remote_qpn;
1307}
1308
9595480c
HS		 1309static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1310{
4dd81e89 1311 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 1312 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1313 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1314 (id->qp_type == IB_QPT_UD)) ||
1315 (!id->qp_type));
1316}
1317
e51060f0
SH		 1318static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1319{
1320 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1321 struct rdma_cm_event event;
e51060f0
SH		 1322 int offset, ret;
1323
1324 listen_id = cm_id->context;
9595480c
HS		 1325 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1326 return -EINVAL;
1327
550e5ca7 1328 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1329 return -ECONNABORTED;
e51060f0 1330
628e5f6d 1331 memset(&event, 0, sizeof event);
e8160e15 1332 offset = cma_user_data_offset(listen_id);
628e5f6d 1333 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 1334 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
628e5f6d
SH		 1335 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1336 event.param.ud.private_data = ib_event->private_data + offset;
1337 event.param.ud.private_data_len =
1338 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1339 } else {
1340 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1341 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1342 ib_event->private_data, offset);
1343 }
e51060f0
SH		 1344 if (!conn_id) {
1345 ret = -ENOMEM;
b6cec8aa 1346 goto err1;
e51060f0
SH		 1347 }
1348
de910bd9 1349 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
be9130cc 1350 ret = cma_acquire_dev(conn_id, listen_id);
a1a733f6 1351 if (ret)
b6cec8aa 1352 goto err2;
e51060f0
SH		 1353
1354 conn_id->cm_id.ib = cm_id;
1355 cm_id->context = conn_id;
1356 cm_id->cm_handler = cma_ib_handler;
1357
25ae21a1
SH		 1358 /*
1359 * Protect against the user destroying conn_id from another thread
1360 * until we're done accessing it.
1361 */
1362 atomic_inc(&conn_id->refcount);
a1b1b61f 1363 ret = conn_id->id.event_handler(&conn_id->id, &event);
b6cec8aa
SH		 1364 if (ret)
1365 goto err3;
b6cec8aa
SH		 1366 /*
1367 * Acquire mutex to prevent user executing rdma_destroy_id()
1368 * while we're accessing the cm_id.
1369 */
1370 mutex_lock(&lock);
dd5f03be
MB		 1371 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1372 (conn_id->id.qp_type != IB_QPT_UD))
b6cec8aa
SH		 1373 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1374 mutex_unlock(&lock);
1375 mutex_unlock(&conn_id->handler_mutex);
1376 mutex_unlock(&listen_id->handler_mutex);
25ae21a1 1377 cma_deref_id(conn_id);
b6cec8aa 1378 return 0;
a1a733f6 1379
b6cec8aa
SH		 1380err3:
1381 cma_deref_id(conn_id);
a1a733f6
KK		 1382 /* Destroy the CM ID by returning a non-zero value. */
1383 conn_id->cm_id.ib = NULL;
b6cec8aa 1384err2:
550e5ca7 1385 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1386 mutex_unlock(&conn_id->handler_mutex);
b6cec8aa 1387err1:
de910bd9 1388 mutex_unlock(&listen_id->handler_mutex);
b6cec8aa
SH		 1389 if (conn_id)
1390 rdma_destroy_id(&conn_id->id);
e51060f0
SH		 1391 return ret;
1392}
1393
cf53936f 1394__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
e51060f0 1395{
496ce3ce
SH		 1396 if (addr->sa_family == AF_IB)
1397 return ((struct sockaddr_ib *) addr)->sib_sid;
1398
cf53936f 1399 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0 1400}
cf53936f 1401EXPORT_SYMBOL(rdma_get_service_id);
e51060f0
SH		 1402
1403static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1404 struct ib_cm_compare_data *compare)
1405{
1406 struct cma_hdr *cma_data, *cma_mask;
1b90c137 1407 __be32 ip4_addr;
e51060f0
SH		 1408 struct in6_addr ip6_addr;
1409
1410 memset(compare, 0, sizeof *compare);
1411 cma_data = (void *) compare->data;
1412 cma_mask = (void *) compare->mask;
e51060f0
SH		 1413
1414 switch (addr->sa_family) {
1415 case AF_INET:
1416 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
01602f11
SH		 1417 cma_set_ip_ver(cma_data, 4);
1418 cma_set_ip_ver(cma_mask, 0xF);
1419 if (!cma_any_addr(addr)) {
1420 cma_data->dst_addr.ip4.addr = ip4_addr;
1421 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1422 }
1423 break;
1424 case AF_INET6:
1425 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
01602f11
SH		 1426 cma_set_ip_ver(cma_data, 6);
1427 cma_set_ip_ver(cma_mask, 0xF);
1428 if (!cma_any_addr(addr)) {
1429 cma_data->dst_addr.ip6 = ip6_addr;
1430 memset(&cma_mask->dst_addr.ip6, 0xFF,
1431 sizeof cma_mask->dst_addr.ip6);
e51060f0
SH		 1432 }
1433 break;
1434 default:
1435 break;
1436 }
1437}
1438
07ebafba
TT		 1439static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1440{
1441 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1442 struct rdma_cm_event event;
07ebafba 1443 int ret = 0;
24d44a39
SW		 1444 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1445 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba 1446
550e5ca7 1447 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
be65f086 1448 return 0;
07ebafba 1449
be65f086 1450 memset(&event, 0, sizeof event);
07ebafba
TT		 1451 switch (iw_event->event) {
1452 case IW_CM_EVENT_CLOSE:
a1b1b61f 1453 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1454 break;
1455 case IW_CM_EVENT_CONNECT_REPLY:
24d44a39
SW		 1456 memcpy(cma_src_addr(id_priv), laddr,
1457 rdma_addr_size(laddr));
1458 memcpy(cma_dst_addr(id_priv), raddr,
1459 rdma_addr_size(raddr));
881a045f
SW		 1460 switch (iw_event->status) {
1461 case 0:
a1b1b61f 1462 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1463 event.param.conn.initiator_depth = iw_event->ird;
1464 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 1465 break;
1466 case -ECONNRESET:
1467 case -ECONNREFUSED:
1468 event.event = RDMA_CM_EVENT_REJECTED;
1469 break;
1470 case -ETIMEDOUT:
1471 event.event = RDMA_CM_EVENT_UNREACHABLE;
1472 break;
1473 default:
1474 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1475 break;
1476 }
07ebafba
TT		 1477 break;
1478 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1479 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1480 event.param.conn.initiator_depth = iw_event->ird;
1481 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 1482 break;
1483 default:
1484 BUG_ON(1);
1485 }
1486
a1b1b61f
SH		 1487 event.status = iw_event->status;
1488 event.param.conn.private_data = iw_event->private_data;
1489 event.param.conn.private_data_len = iw_event->private_data_len;
1490 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1491 if (ret) {
1492 /* Destroy the CM ID by returning a non-zero value. */
1493 id_priv->cm_id.iw = NULL;
550e5ca7 1494 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1495 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1496 rdma_destroy_id(&id_priv->id);
1497 return ret;
1498 }
1499
de910bd9 1500 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1501 return ret;
1502}
1503
1504static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1505 struct iw_cm_event *iw_event)
1506{
1507 struct rdma_cm_id *new_cm_id;
1508 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1509 struct rdma_cm_event event;
07ebafba 1510 int ret;
8d8293cf 1511 struct ib_device_attr attr;
24d44a39
SW		 1512 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1513 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba
TT		 1514
1515 listen_id = cm_id->context;
550e5ca7 1516 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1517 return -ECONNABORTED;
07ebafba
TT		 1518
1519 /* Create a new RDMA id for the new IW CM ID */
1520 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1521 listen_id->id.context,
b26f9b99 1522 RDMA_PS_TCP, IB_QPT_RC);
10f32065 1523 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1524 ret = -ENOMEM;
1525 goto out;
1526 }
1527 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1528 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 1529 conn_id->state = RDMA_CM_CONNECT;
07ebafba 1530
dd5f03be 1531 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
07ebafba 1532 if (ret) {
de910bd9 1533 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1534 rdma_destroy_id(new_cm_id);
1535 goto out;
1536 }
1537
be9130cc 1538 ret = cma_acquire_dev(conn_id, listen_id);
07ebafba 1539 if (ret) {
de910bd9 1540 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1541 rdma_destroy_id(new_cm_id);
1542 goto out;
1543 }
1544
1545 conn_id->cm_id.iw = cm_id;
1546 cm_id->context = conn_id;
1547 cm_id->cm_handler = cma_iw_handler;
1548
24d44a39
SW		 1549 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
1550 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
07ebafba 1551
8d8293cf
SW		 1552 ret = ib_query_device(conn_id->id.device, &attr);
1553 if (ret) {
de910bd9 1554 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1555 rdma_destroy_id(new_cm_id);
1556 goto out;
1557 }
1558
a1b1b61f
SH		 1559 memset(&event, 0, sizeof event);
1560 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1561 event.param.conn.private_data = iw_event->private_data;
1562 event.param.conn.private_data_len = iw_event->private_data_len;
3ebeebc3
KS		 1563 event.param.conn.initiator_depth = iw_event->ird;
1564 event.param.conn.responder_resources = iw_event->ord;
25ae21a1
SH		 1565
1566 /*
1567 * Protect against the user destroying conn_id from another thread
1568 * until we're done accessing it.
1569 */
1570 atomic_inc(&conn_id->refcount);
a1b1b61f 1571 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1572 if (ret) {
1573 /* User wants to destroy the CM ID */
1574 conn_id->cm_id.iw = NULL;
550e5ca7 1575 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1576 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1577 cma_deref_id(conn_id);
07ebafba 1578 rdma_destroy_id(&conn_id->id);
de910bd9 1579 goto out;
07ebafba
TT		 1580 }
1581
de910bd9 1582 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1583 cma_deref_id(conn_id);
de910bd9 1584
07ebafba 1585out:
de910bd9 1586 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1587 return ret;
1588}
1589
e51060f0
SH		 1590static int cma_ib_listen(struct rdma_id_private *id_priv)
1591{
1592 struct ib_cm_compare_data compare_data;
1593 struct sockaddr *addr;
0c9361fc 1594 struct ib_cm_id *id;
e51060f0
SH		 1595 __be64 svc_id;
1596 int ret;
1597
0c9361fc
JM		 1598 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1599 if (IS_ERR(id))
1600 return PTR_ERR(id);
1601
1602 id_priv->cm_id.ib = id;
e51060f0 1603
f4753834 1604 addr = cma_src_addr(id_priv);
cf53936f 1605 svc_id = rdma_get_service_id(&id_priv->id, addr);
406b6a25 1606 if (cma_any_addr(addr) && !id_priv->afonly)
e51060f0
SH		 1607 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1608 else {
1609 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1610 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1611 }
1612
1613 if (ret) {
1614 ib_destroy_cm_id(id_priv->cm_id.ib);
1615 id_priv->cm_id.ib = NULL;
1616 }
1617
1618 return ret;
1619}
1620
07ebafba
TT		 1621static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1622{
1623 int ret;
0c9361fc
JM		 1624 struct iw_cm_id *id;
1625
1626 id = iw_create_cm_id(id_priv->id.device,
1627 iw_conn_req_handler,
1628 id_priv);
1629 if (IS_ERR(id))
1630 return PTR_ERR(id);
07ebafba 1631
68cdba06 1632 id->tos = id_priv->tos;
0c9361fc 1633 id_priv->cm_id.iw = id;
07ebafba 1634
24d44a39
SW		 1635 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
1636 rdma_addr_size(cma_src_addr(id_priv)));
07ebafba
TT		 1637
1638 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1639
1640 if (ret) {
1641 iw_destroy_cm_id(id_priv->cm_id.iw);
1642 id_priv->cm_id.iw = NULL;
1643 }
1644
1645 return ret;
1646}
1647
e51060f0
SH		 1648static int cma_listen_handler(struct rdma_cm_id *id,
1649 struct rdma_cm_event *event)
1650{
1651 struct rdma_id_private *id_priv = id->context;
1652
1653 id->context = id_priv->id.context;
1654 id->event_handler = id_priv->id.event_handler;
1655 return id_priv->id.event_handler(id, event);
1656}
1657
1658static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1659 struct cma_device *cma_dev)
1660{
1661 struct rdma_id_private *dev_id_priv;
1662 struct rdma_cm_id *id;
1663 int ret;
1664
72219cea 1665 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
94d0c939
SH		 1666 return;
1667
b26f9b99
SH		 1668 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1669 id_priv->id.qp_type);
e51060f0
SH		 1670 if (IS_ERR(id))
1671 return;
1672
1673 dev_id_priv = container_of(id, struct rdma_id_private, id);
1674
550e5ca7 1675 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
f4753834
SH		 1676 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
1677 rdma_addr_size(cma_src_addr(id_priv)));
e51060f0
SH		 1678
1679 cma_attach_to_dev(dev_id_priv, cma_dev);
1680 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1681 atomic_inc(&id_priv->refcount);
1682 dev_id_priv->internal_id = 1;
5b0ec991 1683 dev_id_priv->afonly = id_priv->afonly;
e51060f0
SH		 1684
1685 ret = rdma_listen(id, id_priv->backlog);
1686 if (ret)
d02d1f53 1687 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1688 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1689}
1690
1691static void cma_listen_on_all(struct rdma_id_private *id_priv)
1692{
1693 struct cma_device *cma_dev;
1694
1695 mutex_lock(&lock);
1696 list_add_tail(&id_priv->list, &listen_any_list);
1697 list_for_each_entry(cma_dev, &dev_list, list)
1698 cma_listen_on_dev(id_priv, cma_dev);
1699 mutex_unlock(&lock);
1700}
1701
a81c994d
SH		 1702void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1703{
1704 struct rdma_id_private *id_priv;
1705
1706 id_priv = container_of(id, struct rdma_id_private, id);
1707 id_priv->tos = (u8) tos;
1708}
1709EXPORT_SYMBOL(rdma_set_service_type);
1710
e51060f0
SH		 1711static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1712 void *context)
1713{
1714 struct cma_work *work = context;
1715 struct rdma_route *route;
1716
1717 route = &work->id->id.route;
1718
1719 if (!status) {
1720 route->num_paths = 1;
1721 *route->path_rec = *path_rec;
1722 } else {
550e5ca7
NM		 1723 work->old_state = RDMA_CM_ROUTE_QUERY;
1724 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0 1725 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1726 work->event.status = status;
e51060f0
SH		 1727 }
1728
1729 queue_work(cma_wq, &work->work);
1730}
1731
1732static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1733 struct cma_work *work)
1734{
f4753834 1735 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 1736 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1737 ib_sa_comp_mask comp_mask;
1738 struct sockaddr_in6 *sin6;
f68194ca 1739 struct sockaddr_ib *sib;
e51060f0
SH		 1740
1741 memset(&path_rec, 0, sizeof path_rec);
f4753834
SH		 1742 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
1743 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
1744 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
e51060f0 1745 path_rec.numb_path = 1;
962063e6 1746 path_rec.reversible = 1;
cf53936f 1747 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
a81c994d
SH		 1748
1749 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1750 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1751 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1752
f68194ca
SH		 1753 switch (cma_family(id_priv)) {
1754 case AF_INET:
a81c994d
SH		 1755 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1756 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
f68194ca
SH		 1757 break;
1758 case AF_INET6:
f4753834 1759 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
a81c994d
SH		 1760 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1761 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
f68194ca
SH		 1762 break;
1763 case AF_IB:
1764 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
1765 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
1766 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1767 break;
a81c994d 1768 }
e51060f0 1769
c1a0b23b 1770 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1771 id_priv->id.port_num, &path_rec,
1772 comp_mask, timeout_ms,
1773 GFP_KERNEL, cma_query_handler,
1774 work, &id_priv->query);
e51060f0
SH		 1775
1776 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1777}
1778
c4028958 1779static void cma_work_handler(struct work_struct *_work)
e51060f0 1780{
c4028958 1781 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1782 struct rdma_id_private *id_priv = work->id;
1783 int destroy = 0;
1784
de910bd9 1785 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1786 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1787 goto out;
1788
1789 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1790 cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1791 destroy = 1;
1792 }
1793out:
de910bd9 1794 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1795 cma_deref_id(id_priv);
1796 if (destroy)
1797 rdma_destroy_id(&id_priv->id);
1798 kfree(work);
1799}
1800
dd5bdff8
OG		 1801static void cma_ndev_work_handler(struct work_struct *_work)
1802{
1803 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1804 struct rdma_id_private *id_priv = work->id;
1805 int destroy = 0;
1806
1807 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 1808 if (id_priv->state == RDMA_CM_DESTROYING ||
1809 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
dd5bdff8
OG		 1810 goto out;
1811
1812 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1813 cma_exch(id_priv, RDMA_CM_DESTROYING);
dd5bdff8
OG		 1814 destroy = 1;
1815 }
1816
1817out:
1818 mutex_unlock(&id_priv->handler_mutex);
1819 cma_deref_id(id_priv);
1820 if (destroy)
1821 rdma_destroy_id(&id_priv->id);
1822 kfree(work);
1823}
1824
e51060f0
SH		 1825static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1826{
1827 struct rdma_route *route = &id_priv->id.route;
1828 struct cma_work *work;
1829 int ret;
1830
1831 work = kzalloc(sizeof *work, GFP_KERNEL);
1832 if (!work)
1833 return -ENOMEM;
1834
1835 work->id = id_priv;
c4028958 1836 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1837 work->old_state = RDMA_CM_ROUTE_QUERY;
1838 work->new_state = RDMA_CM_ROUTE_RESOLVED;
e51060f0
SH		 1839 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1840
1841 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1842 if (!route->path_rec) {
1843 ret = -ENOMEM;
1844 goto err1;
1845 }
1846
1847 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1848 if (ret)
1849 goto err2;
1850
1851 return 0;
1852err2:
1853 kfree(route->path_rec);
1854 route->path_rec = NULL;
1855err1:
1856 kfree(work);
1857 return ret;
1858}
1859
1860int rdma_set_ib_paths(struct rdma_cm_id *id,
1861 struct ib_sa_path_rec *path_rec, int num_paths)
1862{
1863 struct rdma_id_private *id_priv;
1864 int ret;
1865
1866 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 1867 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1868 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 1869 return -EINVAL;
1870
9893e742
JL		 1871 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1872 GFP_KERNEL);
e51060f0
SH		 1873 if (!id->route.path_rec) {
1874 ret = -ENOMEM;
1875 goto err;
1876 }
1877
ae2d9293 1878 id->route.num_paths = num_paths;
e51060f0
SH		 1879 return 0;
1880err:
550e5ca7 1881 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 1882 return ret;
1883}
1884EXPORT_SYMBOL(rdma_set_ib_paths);
1885
07ebafba
TT		 1886static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1887{
1888 struct cma_work *work;
1889
1890 work = kzalloc(sizeof *work, GFP_KERNEL);
1891 if (!work)
1892 return -ENOMEM;
1893
1894 work->id = id_priv;
c4028958 1895 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1896 work->old_state = RDMA_CM_ROUTE_QUERY;
1897 work->new_state = RDMA_CM_ROUTE_RESOLVED;
07ebafba
TT		 1898 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1899 queue_work(cma_wq, &work->work);
1900 return 0;
1901}
1902
eb072c4b
EP		 1903static int iboe_tos_to_sl(struct net_device *ndev, int tos)
1904{
1905 int prio;
1906 struct net_device *dev;
1907
1908 prio = rt_tos2priority(tos);
1909 dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
1910 vlan_dev_real_dev(ndev) : ndev;
1911
1912 if (dev->num_tc)
1913 return netdev_get_prio_tc_map(dev, prio);
1914
1915#if IS_ENABLED(CONFIG_VLAN_8021Q)
1916 if (ndev->priv_flags & IFF_802_1Q_VLAN)
1917 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
1918 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1919#endif
1920 return 0;
1921}
1922
3c86aa70
EC		 1923static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1924{
1925 struct rdma_route *route = &id_priv->id.route;
1926 struct rdma_addr *addr = &route->addr;
1927 struct cma_work *work;
1928 int ret;
3c86aa70 1929 struct net_device *ndev = NULL;
dd5f03be 1930
3c86aa70 1931
3c86aa70
EC		 1932 work = kzalloc(sizeof *work, GFP_KERNEL);
1933 if (!work)
1934 return -ENOMEM;
1935
1936 work->id = id_priv;
1937 INIT_WORK(&work->work, cma_work_handler);
1938
1939 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1940 if (!route->path_rec) {
1941 ret = -ENOMEM;
1942 goto err1;
1943 }
1944
1945 route->num_paths = 1;
1946
3c86aa70
EC		 1947 if (addr->dev_addr.bound_dev_if)
1948 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1949 if (!ndev) {
1950 ret = -ENODEV;
1951 goto err2;
1952 }
1953
dd5f03be
MB		 1954 route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev);
1955 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
1956 memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len);
af7bd463 1957
7b85627b
MS		 1958 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
1959 &route->path_rec->sgid);
1960 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
1961 &route->path_rec->dgid);
af7bd463
EC		 1962
1963 route->path_rec->hop_limit = 1;
1964 route->path_rec->reversible = 1;
1965 route->path_rec->pkey = cpu_to_be16(0xffff);
1966 route->path_rec->mtu_selector = IB_SA_EQ;
eb072c4b 1967 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
3c86aa70
EC		 1968 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1969 route->path_rec->rate_selector = IB_SA_EQ;
1970 route->path_rec->rate = iboe_get_rate(ndev);
1971 dev_put(ndev);
1972 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1973 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1974 if (!route->path_rec->mtu) {
1975 ret = -EINVAL;
1976 goto err2;
1977 }
1978
550e5ca7
NM		 1979 work->old_state = RDMA_CM_ROUTE_QUERY;
1980 work->new_state = RDMA_CM_ROUTE_RESOLVED;
3c86aa70
EC		 1981 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1982 work->event.status = 0;
1983
1984 queue_work(cma_wq, &work->work);
1985
1986 return 0;
1987
1988err2:
1989 kfree(route->path_rec);
1990 route->path_rec = NULL;
1991err1:
1992 kfree(work);
1993 return ret;
1994}
1995
e51060f0
SH		 1996int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1997{
1998 struct rdma_id_private *id_priv;
1999 int ret;
2000
2001 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2002 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 2003 return -EINVAL;
2004
2005 atomic_inc(&id_priv->refcount);
fe53ba2f 2006 if (rdma_cap_ib_sa(id->device, id->port_num))
c72f2189 2007 ret = cma_resolve_ib_route(id_priv, timeout_ms);
5d9fb044 2008 else if (rdma_protocol_roce(id->device, id->port_num))
c72f2189
MW		 2009 ret = cma_resolve_iboe_route(id_priv);
2010 else if (rdma_protocol_iwarp(id->device, id->port_num))
07ebafba 2011 ret = cma_resolve_iw_route(id_priv, timeout_ms);
c72f2189 2012 else
e51060f0 2013 ret = -ENOSYS;
c72f2189 2014
e51060f0
SH		 2015 if (ret)
2016 goto err;
2017
2018 return 0;
2019err:
550e5ca7 2020 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2021 cma_deref_id(id_priv);
2022 return ret;
2023}
2024EXPORT_SYMBOL(rdma_resolve_route);
2025
6a3e362d
SH		 2026static void cma_set_loopback(struct sockaddr *addr)
2027{
2028 switch (addr->sa_family) {
2029 case AF_INET:
2030 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2031 break;
2032 case AF_INET6:
2033 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2034 0, 0, 0, htonl(1));
2035 break;
2036 default:
2037 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2038 0, 0, 0, htonl(1));
2039 break;
2040 }
2041}
2042
e51060f0
SH		 2043static int cma_bind_loopback(struct rdma_id_private *id_priv)
2044{
b0569e40 2045 struct cma_device *cma_dev, *cur_dev;
e51060f0 2046 struct ib_port_attr port_attr;
f0ee3404 2047 union ib_gid gid;
e51060f0
SH		 2048 u16 pkey;
2049 int ret;
2050 u8 p;
2051
b0569e40 2052 cma_dev = NULL;
e51060f0 2053 mutex_lock(&lock);
b0569e40
SH		 2054 list_for_each_entry(cur_dev, &dev_list, list) {
2055 if (cma_family(id_priv) == AF_IB &&
72219cea 2056 !rdma_cap_ib_cm(cur_dev->device, 1))
b0569e40
SH		 2057 continue;
2058
2059 if (!cma_dev)
2060 cma_dev = cur_dev;
2061
2062 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2063 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2064 port_attr.state == IB_PORT_ACTIVE) {
2065 cma_dev = cur_dev;
2066 goto port_found;
2067 }
2068 }
2069 }
2070
2071 if (!cma_dev) {
e82153b5
KK		 2072 ret = -ENODEV;
2073 goto out;
2074 }
e51060f0 2075
e82153b5 2076 p = 1;
e51060f0
SH		 2077
2078port_found:
f0ee3404 2079 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 2080 if (ret)
2081 goto out;
2082
2083 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2084 if (ret)
2085 goto out;
2086
6f8372b6 2087 id_priv->id.route.addr.dev_addr.dev_type =
21655afc 2088 (rdma_protocol_ib(cma_dev->device, p)) ?
6f8372b6
SH		 2089 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2090
2091 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 2092 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2093 id_priv->id.port_num = p;
2094 cma_attach_to_dev(id_priv, cma_dev);
f4753834 2095 cma_set_loopback(cma_src_addr(id_priv));
e51060f0
SH		 2096out:
2097 mutex_unlock(&lock);
2098 return ret;
2099}
2100
2101static void addr_handler(int status, struct sockaddr *src_addr,
2102 struct rdma_dev_addr *dev_addr, void *context)
2103{
2104 struct rdma_id_private *id_priv = context;
a1b1b61f 2105 struct rdma_cm_event event;
e51060f0 2106
a1b1b61f 2107 memset(&event, 0, sizeof event);
de910bd9 2108 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2109 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2110 RDMA_CM_ADDR_RESOLVED))
61a73c70 2111 goto out;
61a73c70 2112
7b85627b 2113 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
61a73c70 2114 if (!status && !id_priv->cma_dev)
be9130cc 2115 status = cma_acquire_dev(id_priv, NULL);
e51060f0
SH		 2116
2117 if (status) {
550e5ca7
NM		 2118 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2119 RDMA_CM_ADDR_BOUND))
e51060f0 2120 goto out;
a1b1b61f
SH		 2121 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2122 event.status = status;
7b85627b 2123 } else
a1b1b61f 2124 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0 2125
a1b1b61f 2126 if (id_priv->id.event_handler(&id_priv->id, &event)) {
550e5ca7 2127 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2128 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2129 cma_deref_id(id_priv);
2130 rdma_destroy_id(&id_priv->id);
2131 return;
2132 }
2133out:
de910bd9 2134 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2135 cma_deref_id(id_priv);
2136}
2137
2138static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2139{
2140 struct cma_work *work;
f0ee3404 2141 union ib_gid gid;
e51060f0
SH		 2142 int ret;
2143
2144 work = kzalloc(sizeof *work, GFP_KERNEL);
2145 if (!work)
2146 return -ENOMEM;
2147
2148 if (!id_priv->cma_dev) {
2149 ret = cma_bind_loopback(id_priv);
2150 if (ret)
2151 goto err;
2152 }
2153
6f8372b6
SH		 2154 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2155 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2156
e51060f0 2157 work->id = id_priv;
c4028958 2158 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2159 work->old_state = RDMA_CM_ADDR_QUERY;
2160 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0
SH		 2161 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2162 queue_work(cma_wq, &work->work);
2163 return 0;
2164err:
2165 kfree(work);
2166 return ret;
2167}
2168
f17df3b0
SH		 2169static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2170{
2171 struct cma_work *work;
2172 int ret;
2173
2174 work = kzalloc(sizeof *work, GFP_KERNEL);
2175 if (!work)
2176 return -ENOMEM;
2177
2178 if (!id_priv->cma_dev) {
2179 ret = cma_resolve_ib_dev(id_priv);
2180 if (ret)
2181 goto err;
2182 }
2183
2184 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2185 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2186
2187 work->id = id_priv;
2188 INIT_WORK(&work->work, cma_work_handler);
2189 work->old_state = RDMA_CM_ADDR_QUERY;
2190 work->new_state = RDMA_CM_ADDR_RESOLVED;
2191 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2192 queue_work(cma_wq, &work->work);
2193 return 0;
2194err:
2195 kfree(work);
2196 return ret;
2197}
2198
e51060f0
SH		 2199static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2200 struct sockaddr *dst_addr)
2201{
d14714df
SH		 2202 if (!src_addr || !src_addr->sa_family) {
2203 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
f17df3b0
SH		 2204 src_addr->sa_family = dst_addr->sa_family;
2205 if (dst_addr->sa_family == AF_INET6) {
6c26a771
SB		 2206 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2207 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2208 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2209 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2210 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
f17df3b0
SH		 2211 } else if (dst_addr->sa_family == AF_IB) {
2212 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2213 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
d14714df
SH		 2214 }
2215 }
2216 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2217}
2218
2219int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2220 struct sockaddr *dst_addr, int timeout_ms)
2221{
2222 struct rdma_id_private *id_priv;
2223 int ret;
2224
2225 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2226 if (id_priv->state == RDMA_CM_IDLE) {
e51060f0
SH		 2227 ret = cma_bind_addr(id, src_addr, dst_addr);
2228 if (ret)
2229 return ret;
2230 }
2231
4ae7152e
SH		 2232 if (cma_family(id_priv) != dst_addr->sa_family)
2233 return -EINVAL;
2234
550e5ca7 2235 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
e51060f0
SH		 2236 return -EINVAL;
2237
2238 atomic_inc(&id_priv->refcount);
f4753834 2239 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
f17df3b0 2240 if (cma_any_addr(dst_addr)) {
e51060f0 2241 ret = cma_resolve_loopback(id_priv);
f17df3b0
SH		 2242 } else {
2243 if (dst_addr->sa_family == AF_IB) {
2244 ret = cma_resolve_ib_addr(id_priv);
2245 } else {
2246 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2247 dst_addr, &id->route.addr.dev_addr,
2248 timeout_ms, addr_handler, id_priv);
2249 }
2250 }
e51060f0
SH		 2251 if (ret)
2252 goto err;
2253
2254 return 0;
2255err:
550e5ca7 2256 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 2257 cma_deref_id(id_priv);
2258 return ret;
2259}
2260EXPORT_SYMBOL(rdma_resolve_addr);
2261
a9bb7912
HS		 2262int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2263{
2264 struct rdma_id_private *id_priv;
2265 unsigned long flags;
2266 int ret;
2267
2268 id_priv = container_of(id, struct rdma_id_private, id);
2269 spin_lock_irqsave(&id_priv->lock, flags);
c8dea2f9 2270 if (reuse || id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 2271 id_priv->reuseaddr = reuse;
2272 ret = 0;
2273 } else {
2274 ret = -EINVAL;
2275 }
2276 spin_unlock_irqrestore(&id_priv->lock, flags);
2277 return ret;
2278}
2279EXPORT_SYMBOL(rdma_set_reuseaddr);
2280
68602120
SH		 2281int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2282{
2283 struct rdma_id_private *id_priv;
2284 unsigned long flags;
2285 int ret;
2286
2287 id_priv = container_of(id, struct rdma_id_private, id);
2288 spin_lock_irqsave(&id_priv->lock, flags);
2289 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2290 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2291 id_priv->afonly = afonly;
2292 ret = 0;
2293 } else {
2294 ret = -EINVAL;
2295 }
2296 spin_unlock_irqrestore(&id_priv->lock, flags);
2297 return ret;
2298}
2299EXPORT_SYMBOL(rdma_set_afonly);
2300
e51060f0
SH		 2301static void cma_bind_port(struct rdma_bind_list *bind_list,
2302 struct rdma_id_private *id_priv)
2303{
58afdcb7
SH		 2304 struct sockaddr *addr;
2305 struct sockaddr_ib *sib;
2306 u64 sid, mask;
2307 __be16 port;
e51060f0 2308
f4753834 2309 addr = cma_src_addr(id_priv);
58afdcb7
SH		 2310 port = htons(bind_list->port);
2311
2312 switch (addr->sa_family) {
2313 case AF_INET:
2314 ((struct sockaddr_in *) addr)->sin_port = port;
2315 break;
2316 case AF_INET6:
2317 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2318 break;
2319 case AF_IB:
2320 sib = (struct sockaddr_ib *) addr;
2321 sid = be64_to_cpu(sib->sib_sid);
2322 mask = be64_to_cpu(sib->sib_sid_mask);
2323 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2324 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2325 break;
2326 }
e51060f0
SH		 2327 id_priv->bind_list = bind_list;
2328 hlist_add_head(&id_priv->node, &bind_list->owners);
2329}
2330
2331static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2332 unsigned short snum)
2333{
2334 struct rdma_bind_list *bind_list;
3b069c5d 2335 int ret;
e51060f0 2336
cb164b8c 2337 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2338 if (!bind_list)
2339 return -ENOMEM;
2340
3b069c5d
TH		 2341 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2342 if (ret < 0)
2343 goto err;
aedec080
SH		 2344
2345 bind_list->ps = ps;
3b069c5d 2346 bind_list->port = (unsigned short)ret;
aedec080
SH		 2347 cma_bind_port(bind_list, id_priv);
2348 return 0;
3b069c5d 2349err:
aedec080 2350 kfree(bind_list);
3b069c5d 2351 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
aedec080 2352}
e51060f0 2353
aedec080
SH		 2354static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2355{
5d7220e8
TH		 2356 static unsigned int last_used_port;
2357 int low, high, remaining;
2358 unsigned int rover;
e51060f0 2359
0bbf87d8 2360 inet_get_local_port_range(&init_net, &low, &high);
5d7220e8 2361 remaining = (high - low) + 1;
63862b5b 2362 rover = prandom_u32() % remaining + low;
5d7220e8
TH		 2363retry:
2364 if (last_used_port != rover &&
2365 !idr_find(ps, (unsigned short) rover)) {
2366 int ret = cma_alloc_port(ps, id_priv, rover);
2367 /*
2368 * Remember previously used port number in order to avoid
2369 * re-using same port immediately after it is closed.
2370 */
2371 if (!ret)
2372 last_used_port = rover;
2373 if (ret != -EADDRNOTAVAIL)
2374 return ret;
e51060f0 2375 }
5d7220e8
TH		 2376 if (--remaining) {
2377 rover++;
2378 if ((rover < low) || (rover > high))
2379 rover = low;
2380 goto retry;
2381 }
2382 return -EADDRNOTAVAIL;
e51060f0
SH		 2383}
2384
a9bb7912
HS		 2385/*
2386 * Check that the requested port is available. This is called when trying to
2387 * bind to a specific port, or when trying to listen on a bound port. In
2388 * the latter case, the provided id_priv may already be on the bind_list, but
2389 * we still need to check that it's okay to start listening.
2390 */
2391static int cma_check_port(struct rdma_bind_list *bind_list,
2392 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 2393{
2394 struct rdma_id_private *cur_id;
43b752da 2395 struct sockaddr *addr, *cur_addr;
e51060f0 2396
f4753834 2397 addr = cma_src_addr(id_priv);
b67bfe0d 2398 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
a9bb7912
HS		 2399 if (id_priv == cur_id)
2400 continue;
3cd96564 2401
5b0ec991
SH		 2402 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2403 cur_id->reuseaddr)
2404 continue;
e51060f0 2405
f4753834 2406 cur_addr = cma_src_addr(cur_id);
5b0ec991
SH		 2407 if (id_priv->afonly && cur_id->afonly &&
2408 (addr->sa_family != cur_addr->sa_family))
2409 continue;
2410
2411 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2412 return -EADDRNOTAVAIL;
2413
2414 if (!cma_addr_cmp(addr, cur_addr))
2415 return -EADDRINUSE;
a9bb7912 2416 }
e51060f0
SH		 2417 return 0;
2418}
2419
a9bb7912
HS		 2420static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2421{
2422 struct rdma_bind_list *bind_list;
2423 unsigned short snum;
2424 int ret;
2425
f4753834 2426 snum = ntohs(cma_port(cma_src_addr(id_priv)));
a9bb7912
HS		 2427 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2428 return -EACCES;
2429
2430 bind_list = idr_find(ps, snum);
2431 if (!bind_list) {
2432 ret = cma_alloc_port(ps, id_priv, snum);
2433 } else {
2434 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2435 if (!ret)
2436 cma_bind_port(bind_list, id_priv);
2437 }
2438 return ret;
2439}
2440
2441static int cma_bind_listen(struct rdma_id_private *id_priv)
2442{
2443 struct rdma_bind_list *bind_list = id_priv->bind_list;
2444 int ret = 0;
2445
2446 mutex_lock(&lock);
2447 if (bind_list->owners.first->next)
2448 ret = cma_check_port(bind_list, id_priv, 0);
2449 mutex_unlock(&lock);
2450 return ret;
2451}
2452
58afdcb7 2453static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
e51060f0 2454{
e51060f0 2455 switch (id_priv->id.ps) {
e51060f0 2456 case RDMA_PS_TCP:
58afdcb7 2457 return &tcp_ps;
628e5f6d 2458 case RDMA_PS_UDP:
58afdcb7 2459 return &udp_ps;
c8f6a362 2460 case RDMA_PS_IPOIB:
58afdcb7 2461 return &ipoib_ps;
2d2e9415 2462 case RDMA_PS_IB:
58afdcb7 2463 return &ib_ps;
e51060f0 2464 default:
58afdcb7
SH		 2465 return NULL;
2466 }
2467}
2468
2469static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
2470{
2471 struct idr *ps = NULL;
2472 struct sockaddr_ib *sib;
2473 u64 sid_ps, mask, sid;
2474
f4753834 2475 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
58afdcb7
SH		 2476 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2477 sid = be64_to_cpu(sib->sib_sid) & mask;
2478
2479 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2480 sid_ps = RDMA_IB_IP_PS_IB;
2481 ps = &ib_ps;
2482 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2483 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2484 sid_ps = RDMA_IB_IP_PS_TCP;
2485 ps = &tcp_ps;
2486 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2487 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2488 sid_ps = RDMA_IB_IP_PS_UDP;
2489 ps = &udp_ps;
e51060f0
SH		 2490 }
2491
58afdcb7
SH		 2492 if (ps) {
2493 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2494 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2495 be64_to_cpu(sib->sib_sid_mask));
2496 }
2497 return ps;
2498}
2499
2500static int cma_get_port(struct rdma_id_private *id_priv)
2501{
2502 struct idr *ps;
2503 int ret;
2504
f4753834 2505 if (cma_family(id_priv) != AF_IB)
58afdcb7
SH		 2506 ps = cma_select_inet_ps(id_priv);
2507 else
2508 ps = cma_select_ib_ps(id_priv);
2509 if (!ps)
2510 return -EPROTONOSUPPORT;
2511
e51060f0 2512 mutex_lock(&lock);
f4753834 2513 if (cma_any_port(cma_src_addr(id_priv)))
aedec080 2514 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2515 else
2516 ret = cma_use_port(ps, id_priv);
2517 mutex_unlock(&lock);
2518
2519 return ret;
2520}
2521
d14714df
SH		 2522static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2523 struct sockaddr *addr)
2524{
d90f9b35 2525#if IS_ENABLED(CONFIG_IPV6)
d14714df
SH		 2526 struct sockaddr_in6 *sin6;
2527
2528 if (addr->sa_family != AF_INET6)
2529 return 0;
2530
2531 sin6 = (struct sockaddr_in6 *) addr;
5462eddd
SK		 2532
2533 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
2534 return 0;
2535
2536 if (!sin6->sin6_scope_id)
d14714df
SH		 2537 return -EINVAL;
2538
2539 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2540#endif
2541 return 0;
2542}
2543
a9bb7912
HS		 2544int rdma_listen(struct rdma_cm_id *id, int backlog)
2545{
2546 struct rdma_id_private *id_priv;
2547 int ret;
2548
2549 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2550 if (id_priv->state == RDMA_CM_IDLE) {
f4753834
SH		 2551 id->route.addr.src_addr.ss_family = AF_INET;
2552 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
a9bb7912
HS		 2553 if (ret)
2554 return ret;
2555 }
2556
550e5ca7 2557 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
a9bb7912
HS		 2558 return -EINVAL;
2559
2560 if (id_priv->reuseaddr) {
2561 ret = cma_bind_listen(id_priv);
2562 if (ret)
2563 goto err;
2564 }
2565
2566 id_priv->backlog = backlog;
2567 if (id->device) {
72219cea 2568 if (rdma_cap_ib_cm(id->device, 1)) {
a9bb7912
HS		 2569 ret = cma_ib_listen(id_priv);
2570 if (ret)
2571 goto err;
04215330 2572 } else if (rdma_cap_iw_cm(id->device, 1)) {
a9bb7912
HS		 2573 ret = cma_iw_listen(id_priv, backlog);
2574 if (ret)
2575 goto err;
21655afc 2576 } else {
a9bb7912
HS		 2577 ret = -ENOSYS;
2578 goto err;
2579 }
2580 } else
2581 cma_listen_on_all(id_priv);
2582
2583 return 0;
2584err:
2585 id_priv->backlog = 0;
550e5ca7 2586 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 2587 return ret;
2588}
2589EXPORT_SYMBOL(rdma_listen);
2590
e51060f0
SH		 2591int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2592{
2593 struct rdma_id_private *id_priv;
2594 int ret;
2595
680f920a
SH		 2596 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2597 addr->sa_family != AF_IB)
e51060f0
SH		 2598 return -EAFNOSUPPORT;
2599
2600 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2601 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 2602 return -EINVAL;
2603
d14714df
SH		 2604 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2605 if (ret)
2606 goto err1;
2607
7b85627b 2608 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
8523c048 2609 if (!cma_any_addr(addr)) {
680f920a 2610 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
e51060f0 2611 if (ret)
255d0c14
KK		 2612 goto err1;
2613
be9130cc 2614 ret = cma_acquire_dev(id_priv, NULL);
255d0c14
KK		 2615 if (ret)
2616 goto err1;
e51060f0
SH		 2617 }
2618
68602120
SH		 2619 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2620 if (addr->sa_family == AF_INET)
2621 id_priv->afonly = 1;
5b0ec991 2622#if IS_ENABLED(CONFIG_IPV6)
68602120
SH		 2623 else if (addr->sa_family == AF_INET6)
2624 id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
5b0ec991 2625#endif
68602120 2626 }
e51060f0
SH		 2627 ret = cma_get_port(id_priv);
2628 if (ret)
255d0c14 2629 goto err2;
e51060f0
SH		 2630
2631 return 0;
255d0c14 2632err2:
a396d43a
SH		 2633 if (id_priv->cma_dev)
2634 cma_release_dev(id_priv);
255d0c14 2635err1:
550e5ca7 2636 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 2637 return ret;
2638}
2639EXPORT_SYMBOL(rdma_bind_addr);
2640
f4753834 2641static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
e51060f0 2642{
e51060f0 2643 struct cma_hdr *cma_hdr;
e51060f0 2644
01602f11
SH		 2645 cma_hdr = hdr;
2646 cma_hdr->cma_version = CMA_VERSION;
f4753834 2647 if (cma_family(id_priv) == AF_INET) {
1f5175ad
AS		 2648 struct sockaddr_in *src4, *dst4;
2649
f4753834
SH		 2650 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
2651 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
1f5175ad 2652
01602f11
SH		 2653 cma_set_ip_ver(cma_hdr, 4);
2654 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2655 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2656 cma_hdr->port = src4->sin_port;
e8160e15 2657 } else if (cma_family(id_priv) == AF_INET6) {
1f5175ad
AS		 2658 struct sockaddr_in6 *src6, *dst6;
2659
f4753834
SH		 2660 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2661 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
1f5175ad 2662
01602f11
SH		 2663 cma_set_ip_ver(cma_hdr, 6);
2664 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2665 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2666 cma_hdr->port = src6->sin6_port;
e51060f0
SH		 2667 }
2668 return 0;
2669}
2670
628e5f6d
SH		 2671static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2672 struct ib_cm_event *ib_event)
2673{
2674 struct rdma_id_private *id_priv = cm_id->context;
2675 struct rdma_cm_event event;
2676 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2677 int ret = 0;
2678
550e5ca7 2679 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
8aa08602 2680 return 0;
628e5f6d 2681
8aa08602 2682 memset(&event, 0, sizeof event);
628e5f6d
SH		 2683 switch (ib_event->event) {
2684 case IB_CM_SIDR_REQ_ERROR:
2685 event.event = RDMA_CM_EVENT_UNREACHABLE;
2686 event.status = -ETIMEDOUT;
2687 break;
2688 case IB_CM_SIDR_REP_RECEIVED:
2689 event.param.ud.private_data = ib_event->private_data;
2690 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2691 if (rep->status != IB_SIDR_SUCCESS) {
2692 event.event = RDMA_CM_EVENT_UNREACHABLE;
2693 event.status = ib_event->param.sidr_rep_rcvd.status;
2694 break;
2695 }
5c438135 2696 ret = cma_set_qkey(id_priv, rep->qkey);
d2ca39f2
YE		 2697 if (ret) {
2698 event.event = RDMA_CM_EVENT_ADDR_ERROR;
5c438135 2699 event.status = ret;
628e5f6d
SH		 2700 break;
2701 }
2702 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2703 id_priv->id.route.path_rec,
2704 &event.param.ud.ah_attr);
2705 event.param.ud.qp_num = rep->qpn;
2706 event.param.ud.qkey = rep->qkey;
2707 event.event = RDMA_CM_EVENT_ESTABLISHED;
2708 event.status = 0;
2709 break;
2710 default:
468f2239 2711 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2712 ib_event->event);
2713 goto out;
2714 }
2715
2716 ret = id_priv->id.event_handler(&id_priv->id, &event);
2717 if (ret) {
2718 /* Destroy the CM ID by returning a non-zero value. */
2719 id_priv->cm_id.ib = NULL;
550e5ca7 2720 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2721 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2722 rdma_destroy_id(&id_priv->id);
2723 return ret;
2724 }
2725out:
de910bd9 2726 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2727 return ret;
2728}
2729
2730static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2731 struct rdma_conn_param *conn_param)
2732{
2733 struct ib_cm_sidr_req_param req;
0c9361fc 2734 struct ib_cm_id *id;
e511d1ae 2735 void *private_data;
e8160e15 2736 int offset, ret;
628e5f6d 2737
e511d1ae 2738 memset(&req, 0, sizeof req);
e8160e15
SH		 2739 offset = cma_user_data_offset(id_priv);
2740 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 2741 if (req.private_data_len < conn_param->private_data_len)
2742 return -EINVAL;
2743
e8160e15 2744 if (req.private_data_len) {
e511d1ae
SH		 2745 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2746 if (!private_data)
e8160e15
SH		 2747 return -ENOMEM;
2748 } else {
e511d1ae 2749 private_data = NULL;
e8160e15 2750 }
628e5f6d
SH		 2751
2752 if (conn_param->private_data && conn_param->private_data_len)
e511d1ae
SH		 2753 memcpy(private_data + offset, conn_param->private_data,
2754 conn_param->private_data_len);
628e5f6d 2755
e511d1ae
SH		 2756 if (private_data) {
2757 ret = cma_format_hdr(private_data, id_priv);
e8160e15
SH		 2758 if (ret)
2759 goto out;
e511d1ae 2760 req.private_data = private_data;
e8160e15 2761 }
628e5f6d 2762
0c9361fc
JM		 2763 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2764 id_priv);
2765 if (IS_ERR(id)) {
2766 ret = PTR_ERR(id);
628e5f6d
SH		 2767 goto out;
2768 }
0c9361fc 2769 id_priv->cm_id.ib = id;
628e5f6d 2770
f4753834 2771 req.path = id_priv->id.route.path_rec;
cf53936f 2772 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
628e5f6d
SH		 2773 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2774 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2775
2776 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2777 if (ret) {
2778 ib_destroy_cm_id(id_priv->cm_id.ib);
2779 id_priv->cm_id.ib = NULL;
2780 }
2781out:
e511d1ae 2782 kfree(private_data);
628e5f6d
SH		 2783 return ret;
2784}
2785
e51060f0
SH		 2786static int cma_connect_ib(struct rdma_id_private *id_priv,
2787 struct rdma_conn_param *conn_param)
2788{
2789 struct ib_cm_req_param req;
2790 struct rdma_route *route;
2791 void *private_data;
0c9361fc 2792 struct ib_cm_id *id;
e51060f0
SH		 2793 int offset, ret;
2794
2795 memset(&req, 0, sizeof req);
e8160e15 2796 offset = cma_user_data_offset(id_priv);
e51060f0 2797 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 2798 if (req.private_data_len < conn_param->private_data_len)
2799 return -EINVAL;
2800
e8160e15
SH		 2801 if (req.private_data_len) {
2802 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2803 if (!private_data)
2804 return -ENOMEM;
2805 } else {
2806 private_data = NULL;
2807 }
e51060f0
SH		 2808
2809 if (conn_param->private_data && conn_param->private_data_len)
2810 memcpy(private_data + offset, conn_param->private_data,
2811 conn_param->private_data_len);
2812
0c9361fc
JM		 2813 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2814 if (IS_ERR(id)) {
2815 ret = PTR_ERR(id);
e51060f0
SH		 2816 goto out;
2817 }
0c9361fc 2818 id_priv->cm_id.ib = id;
e51060f0
SH		 2819
2820 route = &id_priv->id.route;
e8160e15
SH		 2821 if (private_data) {
2822 ret = cma_format_hdr(private_data, id_priv);
2823 if (ret)
2824 goto out;
2825 req.private_data = private_data;
2826 }
e51060f0
SH		 2827
2828 req.primary_path = &route->path_rec[0];
2829 if (route->num_paths == 2)
2830 req.alternate_path = &route->path_rec[1];
2831
cf53936f 2832 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
e51060f0 2833 req.qp_num = id_priv->qp_num;
18c441a6 2834 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 2835 req.starting_psn = id_priv->seq_num;
2836 req.responder_resources = conn_param->responder_resources;
2837 req.initiator_depth = conn_param->initiator_depth;
2838 req.flow_control = conn_param->flow_control;
4ede178a
SH		 2839 req.retry_count = min_t(u8, 7, conn_param->retry_count);
2840 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 2841 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2842 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2843 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2844 req.srq = id_priv->srq ? 1 : 0;
2845
2846 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2847out:
0c9361fc
JM		 2848 if (ret && !IS_ERR(id)) {
2849 ib_destroy_cm_id(id);
675a027c
KK		 2850 id_priv->cm_id.ib = NULL;
2851 }
2852
e51060f0
SH		 2853 kfree(private_data);
2854 return ret;
2855}
2856
07ebafba
TT		 2857static int cma_connect_iw(struct rdma_id_private *id_priv,
2858 struct rdma_conn_param *conn_param)
2859{
2860 struct iw_cm_id *cm_id;
07ebafba
TT		 2861 int ret;
2862 struct iw_cm_conn_param iw_param;
2863
2864 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 2865 if (IS_ERR(cm_id))
2866 return PTR_ERR(cm_id);
07ebafba 2867
68cdba06 2868 cm_id->tos = id_priv->tos;
07ebafba
TT		 2869 id_priv->cm_id.iw = cm_id;
2870
24d44a39
SW		 2871 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
2872 rdma_addr_size(cma_src_addr(id_priv)));
2873 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
2874 rdma_addr_size(cma_dst_addr(id_priv)));
07ebafba 2875
5851bb89 2876 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2877 if (ret)
2878 goto out;
07ebafba 2879
f45ee80e
HS		 2880 if (conn_param) {
2881 iw_param.ord = conn_param->initiator_depth;
2882 iw_param.ird = conn_param->responder_resources;
2883 iw_param.private_data = conn_param->private_data;
2884 iw_param.private_data_len = conn_param->private_data_len;
2885 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2886 } else {
2887 memset(&iw_param, 0, sizeof iw_param);
07ebafba 2888 iw_param.qpn = id_priv->qp_num;
f45ee80e 2889 }
07ebafba
TT		 2890 ret = iw_cm_connect(cm_id, &iw_param);
2891out:
0c9361fc 2892 if (ret) {
675a027c
KK		 2893 iw_destroy_cm_id(cm_id);
2894 id_priv->cm_id.iw = NULL;
2895 }
07ebafba
TT		 2896 return ret;
2897}
2898
e51060f0
SH		 2899int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2900{
2901 struct rdma_id_private *id_priv;
2902 int ret;
2903
2904 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2905 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
e51060f0
SH		 2906 return -EINVAL;
2907
2908 if (!id->qp) {
2909 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2910 id_priv->srq = conn_param->srq;
2911 }
2912
72219cea 2913 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 2914 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 2915 ret = cma_resolve_ib_udp(id_priv, conn_param);
2916 else
2917 ret = cma_connect_ib(id_priv, conn_param);
04215330 2918 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 2919 ret = cma_connect_iw(id_priv, conn_param);
21655afc 2920 else
e51060f0 2921 ret = -ENOSYS;
e51060f0
SH		 2922 if (ret)
2923 goto err;
2924
2925 return 0;
2926err:
550e5ca7 2927 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
e51060f0
SH		 2928 return ret;
2929}
2930EXPORT_SYMBOL(rdma_connect);
2931
2932static int cma_accept_ib(struct rdma_id_private *id_priv,
2933 struct rdma_conn_param *conn_param)
2934{
2935 struct ib_cm_rep_param rep;
5851bb89 2936 int ret;
0fe313b0 2937
5851bb89
SH		 2938 ret = cma_modify_qp_rtr(id_priv, conn_param);
2939 if (ret)
2940 goto out;
0fe313b0 2941
5851bb89
SH		 2942 ret = cma_modify_qp_rts(id_priv, conn_param);
2943 if (ret)
2944 goto out;
e51060f0
SH		 2945
2946 memset(&rep, 0, sizeof rep);
2947 rep.qp_num = id_priv->qp_num;
2948 rep.starting_psn = id_priv->seq_num;
2949 rep.private_data = conn_param->private_data;
2950 rep.private_data_len = conn_param->private_data_len;
2951 rep.responder_resources = conn_param->responder_resources;
2952 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2953 rep.failover_accepted = 0;
2954 rep.flow_control = conn_param->flow_control;
4ede178a 2955 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 2956 rep.srq = id_priv->srq ? 1 : 0;
2957
0fe313b0
SH		 2958 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2959out:
2960 return ret;
e51060f0
SH		 2961}
2962
07ebafba
TT		 2963static int cma_accept_iw(struct rdma_id_private *id_priv,
2964 struct rdma_conn_param *conn_param)
2965{
2966 struct iw_cm_conn_param iw_param;
2967 int ret;
2968
5851bb89 2969 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2970 if (ret)
2971 return ret;
2972
2973 iw_param.ord = conn_param->initiator_depth;
2974 iw_param.ird = conn_param->responder_resources;
2975 iw_param.private_data = conn_param->private_data;
2976 iw_param.private_data_len = conn_param->private_data_len;
2977 if (id_priv->id.qp) {
2978 iw_param.qpn = id_priv->qp_num;
2979 } else
2980 iw_param.qpn = conn_param->qp_num;
2981
2982 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2983}
2984
628e5f6d 2985static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
5c438135 2986 enum ib_cm_sidr_status status, u32 qkey,
628e5f6d
SH		 2987 const void *private_data, int private_data_len)
2988{
2989 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2990 int ret;
628e5f6d
SH		 2991
2992 memset(&rep, 0, sizeof rep);
2993 rep.status = status;
2994 if (status == IB_SIDR_SUCCESS) {
5c438135 2995 ret = cma_set_qkey(id_priv, qkey);
d2ca39f2
YE		 2996 if (ret)
2997 return ret;
628e5f6d 2998 rep.qp_num = id_priv->qp_num;
c8f6a362 2999 rep.qkey = id_priv->qkey;
628e5f6d
SH		 3000 }
3001 rep.private_data = private_data;
3002 rep.private_data_len = private_data_len;
3003
3004 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3005}
3006
e51060f0
SH		 3007int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3008{
3009 struct rdma_id_private *id_priv;
3010 int ret;
3011
3012 id_priv = container_of(id, struct rdma_id_private, id);
83e9502d
NM		 3013
3014 id_priv->owner = task_pid_nr(current);
3015
550e5ca7 3016 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
e51060f0
SH		 3017 return -EINVAL;
3018
3019 if (!id->qp && conn_param) {
3020 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3021 id_priv->srq = conn_param->srq;
3022 }
3023
72219cea 3024 if (rdma_cap_ib_cm(id->device, id->port_num)) {
f45ee80e
HS		 3025 if (id->qp_type == IB_QPT_UD) {
3026 if (conn_param)
3027 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3028 conn_param->qkey,
f45ee80e
HS		 3029 conn_param->private_data,
3030 conn_param->private_data_len);
3031 else
3032 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3033 0, NULL, 0);
f45ee80e
HS		 3034 } else {
3035 if (conn_param)
3036 ret = cma_accept_ib(id_priv, conn_param);
3037 else
3038 ret = cma_rep_recv(id_priv);
3039 }
04215330 3040 } else if (rdma_cap_iw_cm(id->device, id->port_num))
07ebafba 3041 ret = cma_accept_iw(id_priv, conn_param);
21655afc 3042 else
e51060f0 3043 ret = -ENOSYS;
e51060f0
SH		 3044
3045 if (ret)
3046 goto reject;
3047
3048 return 0;
3049reject:
c5483388 3050 cma_modify_qp_err(id_priv);
e51060f0
SH		 3051 rdma_reject(id, NULL, 0);
3052 return ret;
3053}
3054EXPORT_SYMBOL(rdma_accept);
3055
0fe313b0
SH		 3056int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3057{
3058 struct rdma_id_private *id_priv;
3059 int ret;
3060
3061 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3062 if (!id_priv->cm_id.ib)
0fe313b0
SH		 3063 return -EINVAL;
3064
3065 switch (id->device->node_type) {
3066 case RDMA_NODE_IB_CA:
3067 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3068 break;
3069 default:
3070 ret = 0;
3071 break;
3072 }
3073 return ret;
3074}
3075EXPORT_SYMBOL(rdma_notify);
3076
e51060f0
SH		 3077int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3078 u8 private_data_len)
3079{
3080 struct rdma_id_private *id_priv;
3081 int ret;
3082
3083 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3084 if (!id_priv->cm_id.ib)
e51060f0
SH		 3085 return -EINVAL;
3086
72219cea 3087 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 3088 if (id->qp_type == IB_QPT_UD)
5c438135 3089 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
628e5f6d
SH		 3090 private_data, private_data_len);
3091 else
3092 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3093 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3094 0, private_data, private_data_len);
04215330 3095 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba
TT		 3096 ret = iw_cm_reject(id_priv->cm_id.iw,
3097 private_data, private_data_len);
21655afc 3098 } else
e51060f0 3099 ret = -ENOSYS;
21655afc 3100
e51060f0
SH		 3101 return ret;
3102}
3103EXPORT_SYMBOL(rdma_reject);
3104
3105int rdma_disconnect(struct rdma_cm_id *id)
3106{
3107 struct rdma_id_private *id_priv;
3108 int ret;
3109
3110 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3111 if (!id_priv->cm_id.ib)
e51060f0
SH		 3112 return -EINVAL;
3113
72219cea 3114 if (rdma_cap_ib_cm(id->device, id->port_num)) {
c5483388 3115 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 3116 if (ret)
3117 goto out;
e51060f0
SH		 3118 /* Initiate or respond to a disconnect. */
3119 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3120 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
04215330 3121 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba 3122 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
21655afc 3123 } else
07ebafba 3124 ret = -EINVAL;
21655afc 3125
e51060f0
SH		 3126out:
3127 return ret;
3128}
3129EXPORT_SYMBOL(rdma_disconnect);
3130
c8f6a362
SH		 3131static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3132{
3133 struct rdma_id_private *id_priv;
3134 struct cma_multicast *mc = multicast->context;
3135 struct rdma_cm_event event;
3136 int ret;
3137
3138 id_priv = mc->id_priv;
550e5ca7
NM		 3139 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3140 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
8aa08602 3141 return 0;
c8f6a362 3142
5c438135
SH		 3143 if (!status)
3144 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
c5483388 3145 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 3146 if (!status && id_priv->id.qp)
3147 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
46ea5061 3148 be16_to_cpu(multicast->rec.mlid));
c5483388 3149 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 3150
3151 memset(&event, 0, sizeof event);
3152 event.status = status;
3153 event.param.ud.private_data = mc->context;
3154 if (!status) {
3155 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3156 ib_init_ah_from_mcmember(id_priv->id.device,
3157 id_priv->id.port_num, &multicast->rec,
3158 &event.param.ud.ah_attr);
3159 event.param.ud.qp_num = 0xFFFFFF;
3160 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3161 } else
3162 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3163
3164 ret = id_priv->id.event_handler(&id_priv->id, &event);
3165 if (ret) {
550e5ca7 3166 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 3167 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3168 rdma_destroy_id(&id_priv->id);
3169 return 0;
3170 }
8aa08602 3171
de910bd9 3172 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3173 return 0;
3174}
3175
3176static void cma_set_mgid(struct rdma_id_private *id_priv,
3177 struct sockaddr *addr, union ib_gid *mgid)
3178{
3179 unsigned char mc_map[MAX_ADDR_LEN];
3180 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3181 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3182 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3183
3184 if (cma_any_addr(addr)) {
3185 memset(mgid, 0, sizeof *mgid);
3186 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 3187 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 3188 0xFF10A01B)) {
3189 /* IPv6 address is an SA assigned MGID. */
3190 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
5bc2b7b3
SH		 3191 } else if (addr->sa_family == AF_IB) {
3192 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
e2e62697
JG		 3193 } else if ((addr->sa_family == AF_INET6)) {
3194 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3195 if (id_priv->id.ps == RDMA_PS_UDP)
3196 mc_map[7] = 0x01; /* Use RDMA CM signature */
3197 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 3198 } else {
a9e527e3 3199 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 3200 if (id_priv->id.ps == RDMA_PS_UDP)
3201 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 3202 *mgid = *(union ib_gid *) (mc_map + 4);
3203 }
3204}
3205
3206static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3207 struct cma_multicast *mc)
3208{
3209 struct ib_sa_mcmember_rec rec;
3210 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3211 ib_sa_comp_mask comp_mask;
3212 int ret;
3213
3214 ib_addr_get_mgid(dev_addr, &rec.mgid);
3215 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3216 &rec.mgid, &rec);
3217 if (ret)
3218 return ret;
3219
5bc2b7b3
SH		 3220 ret = cma_set_qkey(id_priv, 0);
3221 if (ret)
3222 return ret;
3223
3f446754 3224 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
5bc2b7b3 3225 rec.qkey = cpu_to_be32(id_priv->qkey);
6f8372b6 3226 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 3227 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3228 rec.join_state = 1;
3229
3230 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3231 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3232 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3233 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3234 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3235
84adeee9
YE		 3236 if (id_priv->id.ps == RDMA_PS_IPOIB)
3237 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2a22fb8c
DB		 3238 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3239 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3240 IB_SA_MCMEMBER_REC_MTU |
3241 IB_SA_MCMEMBER_REC_HOP_LIMIT;
84adeee9 3242
c8f6a362
SH		 3243 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3244 id_priv->id.port_num, &rec,
3245 comp_mask, GFP_KERNEL,
3246 cma_ib_mc_handler, mc);
8c6ffba0 3247 return PTR_ERR_OR_ZERO(mc->multicast.ib);
c8f6a362
SH		 3248}
3249
3c86aa70
EC		 3250static void iboe_mcast_work_handler(struct work_struct *work)
3251{
3252 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3253 struct cma_multicast *mc = mw->mc;
3254 struct ib_sa_multicast *m = mc->multicast.ib;
3255
3256 mc->multicast.ib->context = mc;
3257 cma_ib_mc_handler(0, m);
3258 kref_put(&mc->mcref, release_mc);
3259 kfree(mw);
3260}
3261
3262static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3263{
3264 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3265 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3266
3267 if (cma_any_addr(addr)) {
3268 memset(mgid, 0, sizeof *mgid);
3269 } else if (addr->sa_family == AF_INET6) {
3270 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3271 } else {
3272 mgid->raw[0] = 0xff;
3273 mgid->raw[1] = 0x0e;
3274 mgid->raw[2] = 0;
3275 mgid->raw[3] = 0;
3276 mgid->raw[4] = 0;
3277 mgid->raw[5] = 0;
3278 mgid->raw[6] = 0;
3279 mgid->raw[7] = 0;
3280 mgid->raw[8] = 0;
3281 mgid->raw[9] = 0;
3282 mgid->raw[10] = 0xff;
3283 mgid->raw[11] = 0xff;
3284 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3285 }
3286}
3287
3288static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3289 struct cma_multicast *mc)
3290{
3291 struct iboe_mcast_work *work;
3292 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3293 int err;
3294 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3295 struct net_device *ndev = NULL;
3296
3297 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3298 return -EINVAL;
3299
3300 work = kzalloc(sizeof *work, GFP_KERNEL);
3301 if (!work)
3302 return -ENOMEM;
3303
3304 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3305 if (!mc->multicast.ib) {
3306 err = -ENOMEM;
3307 goto out1;
3308 }
3309
3310 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3311
3312 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3313 if (id_priv->id.ps == RDMA_PS_UDP)
3314 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3315
3316 if (dev_addr->bound_dev_if)
3317 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3318 if (!ndev) {
3319 err = -ENODEV;
3320 goto out2;
3321 }
3322 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3323 mc->multicast.ib->rec.hop_limit = 1;
3324 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3325 dev_put(ndev);
3326 if (!mc->multicast.ib->rec.mtu) {
3327 err = -EINVAL;
3328 goto out2;
3329 }
7b85627b
MS		 3330 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3331 &mc->multicast.ib->rec.port_gid);
3c86aa70
EC		 3332 work->id = id_priv;
3333 work->mc = mc;
3334 INIT_WORK(&work->work, iboe_mcast_work_handler);
3335 kref_get(&mc->mcref);
3336 queue_work(cma_wq, &work->work);
3337
3338 return 0;
3339
3340out2:
3341 kfree(mc->multicast.ib);
3342out1:
3343 kfree(work);
3344 return err;
3345}
3346
c8f6a362
SH		 3347int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3348 void *context)
3349{
3350 struct rdma_id_private *id_priv;
3351 struct cma_multicast *mc;
3352 int ret;
3353
3354 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 3355 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3356 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 3357 return -EINVAL;
3358
3359 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3360 if (!mc)
3361 return -ENOMEM;
3362
ef560861 3363 memcpy(&mc->addr, addr, rdma_addr_size(addr));
c8f6a362
SH		 3364 mc->context = context;
3365 mc->id_priv = id_priv;
3366
3367 spin_lock(&id_priv->lock);
3368 list_add(&mc->list, &id_priv->mc_list);
3369 spin_unlock(&id_priv->lock);
3370
5d9fb044 3371 if (rdma_protocol_roce(id->device, id->port_num)) {
5c9a5282
MW		 3372 kref_init(&mc->mcref);
3373 ret = cma_iboe_join_multicast(id_priv, mc);
a31ad3b0 3374 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
5c9a5282
MW		 3375 ret = cma_join_ib_multicast(id_priv, mc);
3376 else
c8f6a362 3377 ret = -ENOSYS;
c8f6a362
SH		 3378
3379 if (ret) {
3380 spin_lock_irq(&id_priv->lock);
3381 list_del(&mc->list);
3382 spin_unlock_irq(&id_priv->lock);
3383 kfree(mc);
3384 }
3385 return ret;
3386}
3387EXPORT_SYMBOL(rdma_join_multicast);
3388
3389void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3390{
3391 struct rdma_id_private *id_priv;
3392 struct cma_multicast *mc;
3393
3394 id_priv = container_of(id, struct rdma_id_private, id);
3395 spin_lock_irq(&id_priv->lock);
3396 list_for_each_entry(mc, &id_priv->mc_list, list) {
ef560861 3397 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
c8f6a362
SH		 3398 list_del(&mc->list);
3399 spin_unlock_irq(&id_priv->lock);
3400
3401 if (id->qp)
3402 ib_detach_mcast(id->qp,
3403 &mc->multicast.ib->rec.mgid,
46ea5061 3404 be16_to_cpu(mc->multicast.ib->rec.mlid));
5c9a5282
MW		 3405
3406 BUG_ON(id_priv->cma_dev->device != id->device);
3407
a31ad3b0 3408 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
5c9a5282
MW		 3409 ib_sa_free_multicast(mc->multicast.ib);
3410 kfree(mc);
5d9fb044 3411 } else if (rdma_protocol_roce(id->device, id->port_num))
5c9a5282
MW		 3412 kref_put(&mc->mcref, release_mc);
3413
c8f6a362
SH		 3414 return;
3415 }
3416 }
3417 spin_unlock_irq(&id_priv->lock);
3418}
3419EXPORT_SYMBOL(rdma_leave_multicast);
3420
dd5bdff8
OG		 3421static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3422{
3423 struct rdma_dev_addr *dev_addr;
3424 struct cma_ndev_work *work;
3425
3426 dev_addr = &id_priv->id.route.addr.dev_addr;
3427
6266ed6e 3428 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 3429 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3430 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3431 ndev->name, &id_priv->id);
3432 work = kzalloc(sizeof *work, GFP_KERNEL);
3433 if (!work)
3434 return -ENOMEM;
3435
3436 INIT_WORK(&work->work, cma_ndev_work_handler);
3437 work->id = id_priv;
3438 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3439 atomic_inc(&id_priv->refcount);
3440 queue_work(cma_wq, &work->work);
3441 }
3442
3443 return 0;
3444}
3445
3446static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
351638e7 3447 void *ptr)
dd5bdff8 3448{
351638e7 3449 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
dd5bdff8
OG		 3450 struct cma_device *cma_dev;
3451 struct rdma_id_private *id_priv;
3452 int ret = NOTIFY_DONE;
3453
3454 if (dev_net(ndev) != &init_net)
3455 return NOTIFY_DONE;
3456
3457 if (event != NETDEV_BONDING_FAILOVER)
3458 return NOTIFY_DONE;
3459
3460 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3461 return NOTIFY_DONE;
3462
3463 mutex_lock(&lock);
3464 list_for_each_entry(cma_dev, &dev_list, list)
3465 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3466 ret = cma_netdev_change(ndev, id_priv);
3467 if (ret)
3468 goto out;
3469 }
3470
3471out:
3472 mutex_unlock(&lock);
3473 return ret;
3474}
3475
3476static struct notifier_block cma_nb = {
3477 .notifier_call = cma_netdev_callback
3478};
3479
e51060f0
SH		 3480static void cma_add_one(struct ib_device *device)
3481{
3482 struct cma_device *cma_dev;
3483 struct rdma_id_private *id_priv;
3484
3485 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3486 if (!cma_dev)
3487 return;
3488
3489 cma_dev->device = device;
e51060f0
SH		 3490
3491 init_completion(&cma_dev->comp);
3492 atomic_set(&cma_dev->refcount, 1);
3493 INIT_LIST_HEAD(&cma_dev->id_list);
3494 ib_set_client_data(device, &cma_client, cma_dev);
3495
3496 mutex_lock(&lock);
3497 list_add_tail(&cma_dev->list, &dev_list);
3498 list_for_each_entry(id_priv, &listen_any_list, list)
3499 cma_listen_on_dev(id_priv, cma_dev);
3500 mutex_unlock(&lock);
e51060f0
SH		 3501}
3502
3503static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3504{
a1b1b61f 3505 struct rdma_cm_event event;
550e5ca7 3506 enum rdma_cm_state state;
de910bd9 3507 int ret = 0;
e51060f0
SH		 3508
3509 /* Record that we want to remove the device */
550e5ca7
NM		 3510 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3511 if (state == RDMA_CM_DESTROYING)
e51060f0
SH		 3512 return 0;
3513
3514 cma_cancel_operation(id_priv, state);
de910bd9 3515 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 3516
3517 /* Check for destruction from another callback. */
550e5ca7 3518 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
de910bd9 3519 goto out;
e51060f0 3520
a1b1b61f
SH		 3521 memset(&event, 0, sizeof event);
3522 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 3523 ret = id_priv->id.event_handler(&id_priv->id, &event);
3524out:
3525 mutex_unlock(&id_priv->handler_mutex);
3526 return ret;
e51060f0
SH		 3527}
3528
3529static void cma_process_remove(struct cma_device *cma_dev)
3530{
e51060f0
SH		 3531 struct rdma_id_private *id_priv;
3532 int ret;
3533
e51060f0
SH		 3534 mutex_lock(&lock);
3535 while (!list_empty(&cma_dev->id_list)) {
3536 id_priv = list_entry(cma_dev->id_list.next,
3537 struct rdma_id_private, list);
3538
d02d1f53 3539 list_del(&id_priv->listen_list);
94de178a 3540 list_del_init(&id_priv->list);
e51060f0
SH		 3541 atomic_inc(&id_priv->refcount);
3542 mutex_unlock(&lock);
3543
d02d1f53 3544 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 3545 cma_deref_id(id_priv);
3546 if (ret)
3547 rdma_destroy_id(&id_priv->id);
3548
3549 mutex_lock(&lock);
3550 }
3551 mutex_unlock(&lock);
3552
3553 cma_deref_dev(cma_dev);
3554 wait_for_completion(&cma_dev->comp);
3555}
3556
3557static void cma_remove_one(struct ib_device *device)
3558{
3559 struct cma_device *cma_dev;
3560
3561 cma_dev = ib_get_client_data(device, &cma_client);
3562 if (!cma_dev)
3563 return;
3564
3565 mutex_lock(&lock);
3566 list_del(&cma_dev->list);
3567 mutex_unlock(&lock);
3568
3569 cma_process_remove(cma_dev);
3570 kfree(cma_dev);
3571}
3572
753f618a
NM		 3573static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3574{
3575 struct nlmsghdr *nlh;
3576 struct rdma_cm_id_stats *id_stats;
3577 struct rdma_id_private *id_priv;
3578 struct rdma_cm_id *id = NULL;
3579 struct cma_device *cma_dev;
3580 int i_dev = 0, i_id = 0;
3581
3582 /*
3583 * We export all of the IDs as a sequence of messages. Each
3584 * ID gets its own netlink message.
3585 */
3586 mutex_lock(&lock);
3587
3588 list_for_each_entry(cma_dev, &dev_list, list) {
3589 if (i_dev < cb->args[0]) {
3590 i_dev++;
3591 continue;
3592 }
3593
3594 i_id = 0;
3595 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3596 if (i_id < cb->args[1]) {
3597 i_id++;
3598 continue;
3599 }
3600
3601 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3602 sizeof *id_stats, RDMA_NL_RDMA_CM,
30dc5e63
TN		 3603 RDMA_NL_RDMA_CM_ID_STATS,
3604 NLM_F_MULTI);
753f618a
NM		 3605 if (!id_stats)
3606 goto out;
3607
3608 memset(id_stats, 0, sizeof *id_stats);
3609 id = &id_priv->id;
3610 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3611 id_stats->port_num = id->port_num;
3612 id_stats->bound_dev_if =
3613 id->route.addr.dev_addr.bound_dev_if;
3614
ce117ffa
SH		 3615 if (ibnl_put_attr(skb, nlh,
3616 rdma_addr_size(cma_src_addr(id_priv)),
3617 cma_src_addr(id_priv),
3618 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3619 goto out;
3620 if (ibnl_put_attr(skb, nlh,
3621 rdma_addr_size(cma_src_addr(id_priv)),
3622 cma_dst_addr(id_priv),
3623 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3624 goto out;
753f618a 3625
83e9502d 3626 id_stats->pid = id_priv->owner;
753f618a
NM		 3627 id_stats->port_space = id->ps;
3628 id_stats->cm_state = id_priv->state;
3629 id_stats->qp_num = id_priv->qp_num;
3630 id_stats->qp_type = id->qp_type;
3631
3632 i_id++;
3633 }
3634
3635 cb->args[1] = 0;
3636 i_dev++;
3637 }
3638
3639out:
3640 mutex_unlock(&lock);
3641 cb->args[0] = i_dev;
3642 cb->args[1] = i_id;
3643
3644 return skb->len;
3645}
3646
3647static const struct ibnl_client_cbs cma_cb_table[] = {
809d5fc9
G		 3648 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3649 .module = THIS_MODULE },
753f618a
NM		 3650};
3651
716abb1f 3652static int __init cma_init(void)
e51060f0 3653{
5d7220e8 3654 int ret;
227b60f5 3655
c7f743a6 3656 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 3657 if (!cma_wq)
3658 return -ENOMEM;
3659
c1a0b23b 3660 ib_sa_register_client(&sa_client);
7a118df3 3661 rdma_addr_register_client(&addr_client);
dd5bdff8 3662 register_netdevice_notifier(&cma_nb);
c1a0b23b 3663
e51060f0
SH		 3664 ret = ib_register_client(&cma_client);
3665 if (ret)
3666 goto err;
753f618a
NM		 3667
3668 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3669 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3670
e51060f0
SH		 3671 return 0;
3672
3673err:
dd5bdff8 3674 unregister_netdevice_notifier(&cma_nb);
7a118df3 3675 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3676 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3677 destroy_workqueue(cma_wq);
3678 return ret;
3679}
3680
716abb1f 3681static void __exit cma_cleanup(void)
e51060f0 3682{
753f618a 3683 ibnl_remove_client(RDMA_NL_RDMA_CM);
e51060f0 3684 ib_unregister_client(&cma_client);
dd5bdff8 3685 unregister_netdevice_notifier(&cma_nb);
7a118df3 3686 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3687 ib_sa_unregister_client(&sa_client);
e51060f0 3688 destroy_workqueue(cma_wq);
e51060f0 3689 idr_destroy(&tcp_ps);
628e5f6d 3690 idr_destroy(&udp_ps);
c8f6a362 3691 idr_destroy(&ipoib_ps);
2d2e9415 3692 idr_destroy(&ib_ps);
e51060f0
SH		 3693}
3694
3695module_init(cma_init);
3696module_exit(cma_cleanup);
Linux kernel - Deliverables
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