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IB/cm: Modify interface to send MRAs in response to duplicate messages
[GitHub/mt8127/android_kernel_alcatel_ttab.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 *
7 * This Software is licensed under one of the following licenses:
8 *
9 * 1) under the terms of the "Common Public License 1.0" a copy of which is
10 * available from the Open Source Initiative, see
11 * http://www.opensource.org/licenses/cpl.php.
12 *
13 * 2) under the terms of the "The BSD License" a copy of which is
14 * available from the Open Source Initiative, see
15 * http://www.opensource.org/licenses/bsd-license.php.
16 *
17 * 3) under the terms of the "GNU General Public License (GPL) Version 2" a
18 * copy of which is available from the Open Source Initiative, see
19 * http://www.opensource.org/licenses/gpl-license.php.
20 *
21 * Licensee has the right to choose one of the above licenses.
22 *
23 * Redistributions of source code must retain the above copyright
24 * notice and one of the license notices.
25 *
26 * Redistributions in binary form must reproduce both the above copyright
27 * notice, one of the license notices in the documentation
28 * and/or other materials provided with the distribution.
29 *
30 */
31
32#include <linux/completion.h>
33#include <linux/in.h>
34#include <linux/in6.h>
35#include <linux/mutex.h>
36#include <linux/random.h>
37#include <linux/idr.h>
07ebafba 38#include <linux/inetdevice.h>
e51060f0
SH		 39
40#include <net/tcp.h>
41
42#include <rdma/rdma_cm.h>
43#include <rdma/rdma_cm_ib.h>
44#include <rdma/ib_cache.h>
45#include <rdma/ib_cm.h>
46#include <rdma/ib_sa.h>
07ebafba 47#include <rdma/iw_cm.h>
e51060f0
SH		 48
49MODULE_AUTHOR("Sean Hefty");
50MODULE_DESCRIPTION("Generic RDMA CM Agent");
51MODULE_LICENSE("Dual BSD/GPL");
52
53#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 54#define CMA_MAX_CM_RETRIES 15
e51060f0
SH		 55
56static void cma_add_one(struct ib_device *device);
57static void cma_remove_one(struct ib_device *device);
58
59static struct ib_client cma_client = {
60 .name = "cma",
61 .add = cma_add_one,
62 .remove = cma_remove_one
63};
64
c1a0b23b 65static struct ib_sa_client sa_client;
7a118df3 66static struct rdma_addr_client addr_client;
e51060f0
SH		 67static LIST_HEAD(dev_list);
68static LIST_HEAD(listen_any_list);
69static DEFINE_MUTEX(lock);
70static struct workqueue_struct *cma_wq;
71static DEFINE_IDR(sdp_ps);
72static DEFINE_IDR(tcp_ps);
628e5f6d 73static DEFINE_IDR(udp_ps);
c8f6a362 74static DEFINE_IDR(ipoib_ps);
aedec080 75static int next_port;
e51060f0
SH		 76
77struct cma_device {
78 struct list_head list;
79 struct ib_device *device;
e51060f0
SH		 80 struct completion comp;
81 atomic_t refcount;
82 struct list_head id_list;
83};
84
85enum cma_state {
86 CMA_IDLE,
87 CMA_ADDR_QUERY,
88 CMA_ADDR_RESOLVED,
89 CMA_ROUTE_QUERY,
90 CMA_ROUTE_RESOLVED,
91 CMA_CONNECT,
92 CMA_DISCONNECT,
93 CMA_ADDR_BOUND,
94 CMA_LISTEN,
95 CMA_DEVICE_REMOVAL,
96 CMA_DESTROYING
97};
98
99struct rdma_bind_list {
100 struct idr *ps;
101 struct hlist_head owners;
102 unsigned short port;
103};
104
105/*
106 * Device removal can occur at anytime, so we need extra handling to
107 * serialize notifying the user of device removal with other callbacks.
108 * We do this by disabling removal notification while a callback is in process,
109 * and reporting it after the callback completes.
110 */
111struct rdma_id_private {
112 struct rdma_cm_id id;
113
114 struct rdma_bind_list *bind_list;
115 struct hlist_node node;
116 struct list_head list;
117 struct list_head listen_list;
118 struct cma_device *cma_dev;
c8f6a362 119 struct list_head mc_list;
e51060f0
SH		 120
121 enum cma_state state;
122 spinlock_t lock;
123 struct completion comp;
124 atomic_t refcount;
125 wait_queue_head_t wait_remove;
126 atomic_t dev_remove;
127
128 int backlog;
129 int timeout_ms;
130 struct ib_sa_query *query;
131 int query_id;
132 union {
133 struct ib_cm_id *ib;
07ebafba 134 struct iw_cm_id *iw;
e51060f0
SH		 135 } cm_id;
136
137 u32 seq_num;
c8f6a362 138 u32 qkey;
e51060f0 139 u32 qp_num;
e51060f0 140 u8 srq;
a81c994d 141 u8 tos;
e51060f0
SH		 142};
143
c8f6a362
SH		 144struct cma_multicast {
145 struct rdma_id_private *id_priv;
146 union {
147 struct ib_sa_multicast *ib;
148 } multicast;
149 struct list_head list;
150 void *context;
151 struct sockaddr addr;
152 u8 pad[sizeof(struct sockaddr_in6) -
153 sizeof(struct sockaddr)];
154};
155
e51060f0
SH		 156struct cma_work {
157 struct work_struct work;
158 struct rdma_id_private *id;
159 enum cma_state old_state;
160 enum cma_state new_state;
161 struct rdma_cm_event event;
162};
163
164union cma_ip_addr {
165 struct in6_addr ip6;
166 struct {
167 __u32 pad[3];
168 __u32 addr;
169 } ip4;
170};
171
172struct cma_hdr {
173 u8 cma_version;
174 u8 ip_version; /* IP version: 7:4 */
175 __u16 port;
176 union cma_ip_addr src_addr;
177 union cma_ip_addr dst_addr;
178};
179
180struct sdp_hh {
181 u8 bsdh[16];
182 u8 sdp_version; /* Major version: 7:4 */
183 u8 ip_version; /* IP version: 7:4 */
184 u8 sdp_specific1[10];
185 __u16 port;
186 __u16 sdp_specific2;
187 union cma_ip_addr src_addr;
188 union cma_ip_addr dst_addr;
189};
190
191struct sdp_hah {
192 u8 bsdh[16];
193 u8 sdp_version;
194};
195
196#define CMA_VERSION 0x00
197#define SDP_MAJ_VERSION 0x2
198
199static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
200{
201 unsigned long flags;
202 int ret;
203
204 spin_lock_irqsave(&id_priv->lock, flags);
205 ret = (id_priv->state == comp);
206 spin_unlock_irqrestore(&id_priv->lock, flags);
207 return ret;
208}
209
210static int cma_comp_exch(struct rdma_id_private *id_priv,
211 enum cma_state comp, enum cma_state exch)
212{
213 unsigned long flags;
214 int ret;
215
216 spin_lock_irqsave(&id_priv->lock, flags);
217 if ((ret = (id_priv->state == comp)))
218 id_priv->state = exch;
219 spin_unlock_irqrestore(&id_priv->lock, flags);
220 return ret;
221}
222
223static enum cma_state cma_exch(struct rdma_id_private *id_priv,
224 enum cma_state exch)
225{
226 unsigned long flags;
227 enum cma_state old;
228
229 spin_lock_irqsave(&id_priv->lock, flags);
230 old = id_priv->state;
231 id_priv->state = exch;
232 spin_unlock_irqrestore(&id_priv->lock, flags);
233 return old;
234}
235
236static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
237{
238 return hdr->ip_version >> 4;
239}
240
241static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
242{
243 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
244}
245
246static inline u8 sdp_get_majv(u8 sdp_version)
247{
248 return sdp_version >> 4;
249}
250
251static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
252{
253 return hh->ip_version >> 4;
254}
255
256static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
257{
258 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
259}
260
c8f6a362
SH		 261static inline int cma_is_ud_ps(enum rdma_port_space ps)
262{
263 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
264}
265
e51060f0
SH		 266static void cma_attach_to_dev(struct rdma_id_private *id_priv,
267 struct cma_device *cma_dev)
268{
269 atomic_inc(&cma_dev->refcount);
270 id_priv->cma_dev = cma_dev;
271 id_priv->id.device = cma_dev->device;
272 list_add_tail(&id_priv->list, &cma_dev->id_list);
273}
274
275static inline void cma_deref_dev(struct cma_device *cma_dev)
276{
277 if (atomic_dec_and_test(&cma_dev->refcount))
278 complete(&cma_dev->comp);
279}
280
281static void cma_detach_from_dev(struct rdma_id_private *id_priv)
282{
283 list_del(&id_priv->list);
284 cma_deref_dev(id_priv->cma_dev);
285 id_priv->cma_dev = NULL;
286}
287
c8f6a362
SH		 288static int cma_set_qkey(struct ib_device *device, u8 port_num,
289 enum rdma_port_space ps,
290 struct rdma_dev_addr *dev_addr, u32 *qkey)
291{
292 struct ib_sa_mcmember_rec rec;
293 int ret = 0;
294
295 switch (ps) {
296 case RDMA_PS_UDP:
297 *qkey = RDMA_UDP_QKEY;
298 break;
299 case RDMA_PS_IPOIB:
300 ib_addr_get_mgid(dev_addr, &rec.mgid);
301 ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec);
302 *qkey = be32_to_cpu(rec.qkey);
303 break;
304 default:
305 break;
306 }
307 return ret;
308}
309
07ebafba 310static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 311{
c8f6a362 312 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 313 struct cma_device *cma_dev;
f0ee3404 314 union ib_gid gid;
e51060f0
SH		 315 int ret = -ENODEV;
316
c8f6a362 317 switch (rdma_node_get_transport(dev_addr->dev_type)) {
07ebafba 318 case RDMA_TRANSPORT_IB:
c8f6a362 319 ib_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 320 break;
321 case RDMA_TRANSPORT_IWARP:
c8f6a362 322 iw_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 323 break;
324 default:
325 return -ENODEV;
326 }
61a73c70 327
e51060f0 328 list_for_each_entry(cma_dev, &dev_list, list) {
f0ee3404 329 ret = ib_find_cached_gid(cma_dev->device, &gid,
e51060f0
SH		 330 &id_priv->id.port_num, NULL);
331 if (!ret) {
c8f6a362
SH		 332 ret = cma_set_qkey(cma_dev->device,
333 id_priv->id.port_num,
334 id_priv->id.ps, dev_addr,
335 &id_priv->qkey);
336 if (!ret)
337 cma_attach_to_dev(id_priv, cma_dev);
e51060f0
SH		 338 break;
339 }
340 }
e51060f0
SH		 341 return ret;
342}
343
e51060f0
SH		 344static void cma_deref_id(struct rdma_id_private *id_priv)
345{
346 if (atomic_dec_and_test(&id_priv->refcount))
347 complete(&id_priv->comp);
348}
349
8aa08602
SH		 350static int cma_disable_remove(struct rdma_id_private *id_priv,
351 enum cma_state state)
352{
353 unsigned long flags;
354 int ret;
355
356 spin_lock_irqsave(&id_priv->lock, flags);
357 if (id_priv->state == state) {
358 atomic_inc(&id_priv->dev_remove);
359 ret = 0;
360 } else
361 ret = -EINVAL;
362 spin_unlock_irqrestore(&id_priv->lock, flags);
363 return ret;
364}
365
366static void cma_enable_remove(struct rdma_id_private *id_priv)
e51060f0
SH		 367{
368 if (atomic_dec_and_test(&id_priv->dev_remove))
369 wake_up(&id_priv->wait_remove);
370}
371
6c719f5c
SH		 372static int cma_has_cm_dev(struct rdma_id_private *id_priv)
373{
374 return (id_priv->id.device && id_priv->cm_id.ib);
375}
376
e51060f0
SH		 377struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
378 void *context, enum rdma_port_space ps)
379{
380 struct rdma_id_private *id_priv;
381
382 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
383 if (!id_priv)
384 return ERR_PTR(-ENOMEM);
385
386 id_priv->state = CMA_IDLE;
387 id_priv->id.context = context;
388 id_priv->id.event_handler = event_handler;
389 id_priv->id.ps = ps;
390 spin_lock_init(&id_priv->lock);
391 init_completion(&id_priv->comp);
392 atomic_set(&id_priv->refcount, 1);
393 init_waitqueue_head(&id_priv->wait_remove);
394 atomic_set(&id_priv->dev_remove, 0);
395 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 396 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 397 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
398
399 return &id_priv->id;
400}
401EXPORT_SYMBOL(rdma_create_id);
402
c8f6a362 403static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 404{
405 struct ib_qp_attr qp_attr;
c8f6a362 406 int qp_attr_mask, ret;
e51060f0 407
c8f6a362
SH		 408 qp_attr.qp_state = IB_QPS_INIT;
409 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 410 if (ret)
411 return ret;
412
c8f6a362
SH		 413 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
414 if (ret)
415 return ret;
416
417 qp_attr.qp_state = IB_QPS_RTR;
418 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
419 if (ret)
420 return ret;
421
422 qp_attr.qp_state = IB_QPS_RTS;
423 qp_attr.sq_psn = 0;
424 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
425
426 return ret;
e51060f0
SH		 427}
428
c8f6a362 429static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 430{
431 struct ib_qp_attr qp_attr;
c8f6a362 432 int qp_attr_mask, ret;
07ebafba
TT		 433
434 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 435 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
436 if (ret)
437 return ret;
07ebafba 438
c8f6a362 439 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 440}
441
e51060f0
SH		 442int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
443 struct ib_qp_init_attr *qp_init_attr)
444{
445 struct rdma_id_private *id_priv;
446 struct ib_qp *qp;
447 int ret;
448
449 id_priv = container_of(id, struct rdma_id_private, id);
450 if (id->device != pd->device)
451 return -EINVAL;
452
453 qp = ib_create_qp(pd, qp_init_attr);
454 if (IS_ERR(qp))
455 return PTR_ERR(qp);
456
c8f6a362
SH		 457 if (cma_is_ud_ps(id_priv->id.ps))
458 ret = cma_init_ud_qp(id_priv, qp);
459 else
460 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 461 if (ret)
462 goto err;
463
464 id->qp = qp;
465 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 466 id_priv->srq = (qp->srq != NULL);
467 return 0;
468err:
469 ib_destroy_qp(qp);
470 return ret;
471}
472EXPORT_SYMBOL(rdma_create_qp);
473
474void rdma_destroy_qp(struct rdma_cm_id *id)
475{
476 ib_destroy_qp(id->qp);
477}
478EXPORT_SYMBOL(rdma_destroy_qp);
479
480static int cma_modify_qp_rtr(struct rdma_cm_id *id)
481{
482 struct ib_qp_attr qp_attr;
483 int qp_attr_mask, ret;
484
485 if (!id->qp)
486 return 0;
487
488 /* Need to update QP attributes from default values. */
489 qp_attr.qp_state = IB_QPS_INIT;
490 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
491 if (ret)
492 return ret;
493
494 ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
495 if (ret)
496 return ret;
497
498 qp_attr.qp_state = IB_QPS_RTR;
499 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
500 if (ret)
501 return ret;
502
503 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
504}
505
506static int cma_modify_qp_rts(struct rdma_cm_id *id)
507{
508 struct ib_qp_attr qp_attr;
509 int qp_attr_mask, ret;
510
511 if (!id->qp)
512 return 0;
513
514 qp_attr.qp_state = IB_QPS_RTS;
515 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
516 if (ret)
517 return ret;
518
519 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
520}
521
522static int cma_modify_qp_err(struct rdma_cm_id *id)
523{
524 struct ib_qp_attr qp_attr;
525
526 if (!id->qp)
527 return 0;
528
529 qp_attr.qp_state = IB_QPS_ERR;
530 return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE);
531}
532
c8f6a362
SH		 533static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
534 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
535{
536 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
537 int ret;
538
539 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
540 ib_addr_get_pkey(dev_addr),
541 &qp_attr->pkey_index);
542 if (ret)
543 return ret;
544
545 qp_attr->port_num = id_priv->id.port_num;
546 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
547
548 if (cma_is_ud_ps(id_priv->id.ps)) {
549 qp_attr->qkey = id_priv->qkey;
550 *qp_attr_mask |= IB_QP_QKEY;
551 } else {
552 qp_attr->qp_access_flags = 0;
553 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
554 }
555 return 0;
556}
557
e51060f0
SH		 558int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
559 int *qp_attr_mask)
560{
561 struct rdma_id_private *id_priv;
c8f6a362 562 int ret = 0;
e51060f0
SH		 563
564 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 565 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
566 case RDMA_TRANSPORT_IB:
c8f6a362
SH		 567 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
568 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
569 else
570 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
571 qp_attr_mask);
e51060f0
SH		 572 if (qp_attr->qp_state == IB_QPS_RTR)
573 qp_attr->rq_psn = id_priv->seq_num;
574 break;
07ebafba 575 case RDMA_TRANSPORT_IWARP:
c8f6a362 576 if (!id_priv->cm_id.iw) {
8f076531 577 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 578 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
579 } else
580 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
581 qp_attr_mask);
07ebafba 582 break;
e51060f0
SH		 583 default:
584 ret = -ENOSYS;
585 break;
586 }
587
588 return ret;
589}
590EXPORT_SYMBOL(rdma_init_qp_attr);
591
592static inline int cma_zero_addr(struct sockaddr *addr)
593{
594 struct in6_addr *ip6;
595
596 if (addr->sa_family == AF_INET)
597 return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr);
598 else {
599 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
600 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 601 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 602 }
603}
604
605static inline int cma_loopback_addr(struct sockaddr *addr)
606{
607 return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr);
608}
609
610static inline int cma_any_addr(struct sockaddr *addr)
611{
612 return cma_zero_addr(addr) || cma_loopback_addr(addr);
613}
614
628e5f6d
SH		 615static inline __be16 cma_port(struct sockaddr *addr)
616{
617 if (addr->sa_family == AF_INET)
618 return ((struct sockaddr_in *) addr)->sin_port;
619 else
620 return ((struct sockaddr_in6 *) addr)->sin6_port;
621}
622
e51060f0
SH		 623static inline int cma_any_port(struct sockaddr *addr)
624{
628e5f6d 625 return !cma_port(addr);
e51060f0
SH		 626}
627
628static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
629 u8 *ip_ver, __u16 *port,
630 union cma_ip_addr **src, union cma_ip_addr **dst)
631{
632 switch (ps) {
633 case RDMA_PS_SDP:
634 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
635 SDP_MAJ_VERSION)
636 return -EINVAL;
637
638 *ip_ver = sdp_get_ip_ver(hdr);
639 *port = ((struct sdp_hh *) hdr)->port;
640 *src = &((struct sdp_hh *) hdr)->src_addr;
641 *dst = &((struct sdp_hh *) hdr)->dst_addr;
642 break;
643 default:
644 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
645 return -EINVAL;
646
647 *ip_ver = cma_get_ip_ver(hdr);
648 *port = ((struct cma_hdr *) hdr)->port;
649 *src = &((struct cma_hdr *) hdr)->src_addr;
650 *dst = &((struct cma_hdr *) hdr)->dst_addr;
651 break;
652 }
653
654 if (*ip_ver != 4 && *ip_ver != 6)
655 return -EINVAL;
656 return 0;
657}
658
659static void cma_save_net_info(struct rdma_addr *addr,
660 struct rdma_addr *listen_addr,
661 u8 ip_ver, __u16 port,
662 union cma_ip_addr *src, union cma_ip_addr *dst)
663{
664 struct sockaddr_in *listen4, *ip4;
665 struct sockaddr_in6 *listen6, *ip6;
666
667 switch (ip_ver) {
668 case 4:
669 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
670 ip4 = (struct sockaddr_in *) &addr->src_addr;
671 ip4->sin_family = listen4->sin_family;
672 ip4->sin_addr.s_addr = dst->ip4.addr;
673 ip4->sin_port = listen4->sin_port;
674
675 ip4 = (struct sockaddr_in *) &addr->dst_addr;
676 ip4->sin_family = listen4->sin_family;
677 ip4->sin_addr.s_addr = src->ip4.addr;
678 ip4->sin_port = port;
679 break;
680 case 6:
681 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
682 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
683 ip6->sin6_family = listen6->sin6_family;
684 ip6->sin6_addr = dst->ip6;
685 ip6->sin6_port = listen6->sin6_port;
686
687 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
688 ip6->sin6_family = listen6->sin6_family;
689 ip6->sin6_addr = src->ip6;
690 ip6->sin6_port = port;
691 break;
692 default:
693 break;
694 }
695}
696
697static inline int cma_user_data_offset(enum rdma_port_space ps)
698{
699 switch (ps) {
700 case RDMA_PS_SDP:
701 return 0;
702 default:
703 return sizeof(struct cma_hdr);
704 }
705}
706
e51060f0
SH		 707static void cma_cancel_route(struct rdma_id_private *id_priv)
708{
07ebafba
TT		 709 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
710 case RDMA_TRANSPORT_IB:
e51060f0
SH		 711 if (id_priv->query)
712 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
713 break;
714 default:
715 break;
716 }
717}
718
719static inline int cma_internal_listen(struct rdma_id_private *id_priv)
720{
721 return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev &&
722 cma_any_addr(&id_priv->id.route.addr.src_addr);
723}
724
725static void cma_destroy_listen(struct rdma_id_private *id_priv)
726{
727 cma_exch(id_priv, CMA_DESTROYING);
728
729 if (id_priv->cma_dev) {
07ebafba
TT		 730 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
731 case RDMA_TRANSPORT_IB:
3cd96564 732 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 733 ib_destroy_cm_id(id_priv->cm_id.ib);
734 break;
07ebafba
TT		 735 case RDMA_TRANSPORT_IWARP:
736 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
737 iw_destroy_cm_id(id_priv->cm_id.iw);
738 break;
e51060f0
SH		 739 default:
740 break;
741 }
742 cma_detach_from_dev(id_priv);
743 }
744 list_del(&id_priv->listen_list);
745
746 cma_deref_id(id_priv);
747 wait_for_completion(&id_priv->comp);
748
749 kfree(id_priv);
750}
751
752static void cma_cancel_listens(struct rdma_id_private *id_priv)
753{
754 struct rdma_id_private *dev_id_priv;
755
756 mutex_lock(&lock);
757 list_del(&id_priv->list);
758
759 while (!list_empty(&id_priv->listen_list)) {
760 dev_id_priv = list_entry(id_priv->listen_list.next,
761 struct rdma_id_private, listen_list);
762 cma_destroy_listen(dev_id_priv);
763 }
764 mutex_unlock(&lock);
765}
766
767static void cma_cancel_operation(struct rdma_id_private *id_priv,
768 enum cma_state state)
769{
770 switch (state) {
771 case CMA_ADDR_QUERY:
772 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
773 break;
774 case CMA_ROUTE_QUERY:
775 cma_cancel_route(id_priv);
776 break;
777 case CMA_LISTEN:
778 if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&
779 !id_priv->cma_dev)
780 cma_cancel_listens(id_priv);
781 break;
782 default:
783 break;
784 }
785}
786
787static void cma_release_port(struct rdma_id_private *id_priv)
788{
789 struct rdma_bind_list *bind_list = id_priv->bind_list;
790
791 if (!bind_list)
792 return;
793
794 mutex_lock(&lock);
795 hlist_del(&id_priv->node);
796 if (hlist_empty(&bind_list->owners)) {
797 idr_remove(bind_list->ps, bind_list->port);
798 kfree(bind_list);
799 }
800 mutex_unlock(&lock);
801}
802
c8f6a362
SH		 803static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
804{
805 struct cma_multicast *mc;
806
807 while (!list_empty(&id_priv->mc_list)) {
808 mc = container_of(id_priv->mc_list.next,
809 struct cma_multicast, list);
810 list_del(&mc->list);
811 ib_sa_free_multicast(mc->multicast.ib);
812 kfree(mc);
813 }
814}
815
e51060f0
SH		 816void rdma_destroy_id(struct rdma_cm_id *id)
817{
818 struct rdma_id_private *id_priv;
819 enum cma_state state;
820
821 id_priv = container_of(id, struct rdma_id_private, id);
822 state = cma_exch(id_priv, CMA_DESTROYING);
823 cma_cancel_operation(id_priv, state);
824
61a73c70 825 mutex_lock(&lock);
e51060f0 826 if (id_priv->cma_dev) {
61a73c70 827 mutex_unlock(&lock);
07ebafba
TT		 828 switch (rdma_node_get_transport(id->device->node_type)) {
829 case RDMA_TRANSPORT_IB:
3cd96564 830 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 831 ib_destroy_cm_id(id_priv->cm_id.ib);
832 break;
07ebafba
TT		 833 case RDMA_TRANSPORT_IWARP:
834 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
835 iw_destroy_cm_id(id_priv->cm_id.iw);
836 break;
e51060f0
SH		 837 default:
838 break;
839 }
c8f6a362 840 cma_leave_mc_groups(id_priv);
3cd96564 841 mutex_lock(&lock);
e51060f0 842 cma_detach_from_dev(id_priv);
e51060f0 843 }
61a73c70 844 mutex_unlock(&lock);
e51060f0
SH		 845
846 cma_release_port(id_priv);
847 cma_deref_id(id_priv);
848 wait_for_completion(&id_priv->comp);
849
850 kfree(id_priv->id.route.path_rec);
851 kfree(id_priv);
852}
853EXPORT_SYMBOL(rdma_destroy_id);
854
855static int cma_rep_recv(struct rdma_id_private *id_priv)
856{
857 int ret;
858
859 ret = cma_modify_qp_rtr(&id_priv->id);
860 if (ret)
861 goto reject;
862
863 ret = cma_modify_qp_rts(&id_priv->id);
864 if (ret)
865 goto reject;
866
867 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
868 if (ret)
869 goto reject;
870
871 return 0;
872reject:
873 cma_modify_qp_err(&id_priv->id);
874 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
875 NULL, 0, NULL, 0);
876 return ret;
877}
878
879static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
880{
881 if (id_priv->id.ps == RDMA_PS_SDP &&
882 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
883 SDP_MAJ_VERSION)
884 return -EINVAL;
885
886 return 0;
887}
888
a1b1b61f
SH		 889static void cma_set_rep_event_data(struct rdma_cm_event *event,
890 struct ib_cm_rep_event_param *rep_data,
891 void *private_data)
892{
893 event->param.conn.private_data = private_data;
894 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
895 event->param.conn.responder_resources = rep_data->responder_resources;
896 event->param.conn.initiator_depth = rep_data->initiator_depth;
897 event->param.conn.flow_control = rep_data->flow_control;
898 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
899 event->param.conn.srq = rep_data->srq;
900 event->param.conn.qp_num = rep_data->remote_qpn;
901}
902
e51060f0
SH		 903static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
904{
905 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 906 struct rdma_cm_event event;
907 int ret = 0;
e51060f0 908
8aa08602
SH		 909 if (cma_disable_remove(id_priv, CMA_CONNECT))
910 return 0;
e51060f0 911
a1b1b61f 912 memset(&event, 0, sizeof event);
e51060f0
SH		 913 switch (ib_event->event) {
914 case IB_CM_REQ_ERROR:
915 case IB_CM_REP_ERROR:
a1b1b61f
SH		 916 event.event = RDMA_CM_EVENT_UNREACHABLE;
917 event.status = -ETIMEDOUT;
e51060f0
SH		 918 break;
919 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 920 event.status = cma_verify_rep(id_priv, ib_event->private_data);
921 if (event.status)
922 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 923 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 924 event.status = cma_rep_recv(id_priv);
925 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
926 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 927 } else
a1b1b61f
SH		 928 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
929 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
930 ib_event->private_data);
e51060f0
SH		 931 break;
932 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 933 case IB_CM_USER_ESTABLISHED:
934 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 935 break;
936 case IB_CM_DREQ_ERROR:
a1b1b61f 937 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 938 case IB_CM_DREQ_RECEIVED:
939 case IB_CM_DREP_RECEIVED:
940 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
941 goto out;
a1b1b61f 942 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 943 break;
944 case IB_CM_TIMEWAIT_EXIT:
945 case IB_CM_MRA_RECEIVED:
946 /* ignore event */
947 goto out;
948 case IB_CM_REJ_RECEIVED:
949 cma_modify_qp_err(&id_priv->id);
a1b1b61f
SH		 950 event.status = ib_event->param.rej_rcvd.reason;
951 event.event = RDMA_CM_EVENT_REJECTED;
952 event.param.conn.private_data = ib_event->private_data;
953 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 954 break;
955 default:
956 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
957 ib_event->event);
958 goto out;
959 }
960
a1b1b61f 961 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 962 if (ret) {
963 /* Destroy the CM ID by returning a non-zero value. */
964 id_priv->cm_id.ib = NULL;
965 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 966 cma_enable_remove(id_priv);
e51060f0
SH		 967 rdma_destroy_id(&id_priv->id);
968 return ret;
969 }
970out:
8aa08602 971 cma_enable_remove(id_priv);
e51060f0
SH		 972 return ret;
973}
974
628e5f6d
SH		 975static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
976 struct ib_cm_event *ib_event)
e51060f0
SH		 977{
978 struct rdma_id_private *id_priv;
979 struct rdma_cm_id *id;
980 struct rdma_route *rt;
981 union cma_ip_addr *src, *dst;
982 __u16 port;
983 u8 ip_ver;
984
3f168d2b
KK		 985 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
986 &ip_ver, &port, &src, &dst))
987 goto err;
988
e51060f0
SH		 989 id = rdma_create_id(listen_id->event_handler, listen_id->context,
990 listen_id->ps);
991 if (IS_ERR(id))
3f168d2b
KK		 992 goto err;
993
994 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
995 ip_ver, port, src, dst);
e51060f0
SH		 996
997 rt = &id->route;
998 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 999 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1000 GFP_KERNEL);
e51060f0 1001 if (!rt->path_rec)
3f168d2b 1002 goto destroy_id;
e51060f0 1003
e51060f0
SH		 1004 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1005 if (rt->num_paths == 2)
1006 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1007
1008 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1009 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1010 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
07ebafba 1011 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
e51060f0
SH		 1012
1013 id_priv = container_of(id, struct rdma_id_private, id);
1014 id_priv->state = CMA_CONNECT;
1015 return id_priv;
3f168d2b
KK		 1016
1017destroy_id:
e51060f0 1018 rdma_destroy_id(id);
3f168d2b 1019err:
e51060f0
SH		 1020 return NULL;
1021}
1022
628e5f6d
SH		 1023static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1024 struct ib_cm_event *ib_event)
1025{
1026 struct rdma_id_private *id_priv;
1027 struct rdma_cm_id *id;
1028 union cma_ip_addr *src, *dst;
1029 __u16 port;
1030 u8 ip_ver;
1031 int ret;
1032
1033 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1034 listen_id->ps);
1035 if (IS_ERR(id))
1036 return NULL;
1037
1038
1039 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1040 &ip_ver, &port, &src, &dst))
1041 goto err;
1042
1043 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1044 ip_ver, port, src, dst);
1045
1046 ret = rdma_translate_ip(&id->route.addr.src_addr,
1047 &id->route.addr.dev_addr);
1048 if (ret)
1049 goto err;
1050
1051 id_priv = container_of(id, struct rdma_id_private, id);
1052 id_priv->state = CMA_CONNECT;
1053 return id_priv;
1054err:
1055 rdma_destroy_id(id);
1056 return NULL;
1057}
1058
a1b1b61f
SH		 1059static void cma_set_req_event_data(struct rdma_cm_event *event,
1060 struct ib_cm_req_event_param *req_data,
1061 void *private_data, int offset)
1062{
1063 event->param.conn.private_data = private_data + offset;
1064 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1065 event->param.conn.responder_resources = req_data->responder_resources;
1066 event->param.conn.initiator_depth = req_data->initiator_depth;
1067 event->param.conn.flow_control = req_data->flow_control;
1068 event->param.conn.retry_count = req_data->retry_count;
1069 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1070 event->param.conn.srq = req_data->srq;
1071 event->param.conn.qp_num = req_data->remote_qpn;
1072}
1073
e51060f0
SH		 1074static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1075{
1076 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1077 struct rdma_cm_event event;
e51060f0
SH		 1078 int offset, ret;
1079
1080 listen_id = cm_id->context;
8aa08602
SH		 1081 if (cma_disable_remove(listen_id, CMA_LISTEN))
1082 return -ECONNABORTED;
e51060f0 1083
628e5f6d
SH		 1084 memset(&event, 0, sizeof event);
1085 offset = cma_user_data_offset(listen_id->id.ps);
1086 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
c8f6a362 1087 if (cma_is_ud_ps(listen_id->id.ps)) {
628e5f6d
SH		 1088 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1089 event.param.ud.private_data = ib_event->private_data + offset;
1090 event.param.ud.private_data_len =
1091 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1092 } else {
1093 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1094 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1095 ib_event->private_data, offset);
1096 }
e51060f0
SH		 1097 if (!conn_id) {
1098 ret = -ENOMEM;
1099 goto out;
1100 }
1101
1102 atomic_inc(&conn_id->dev_remove);
61a73c70 1103 mutex_lock(&lock);
07ebafba 1104 ret = cma_acquire_dev(conn_id);
61a73c70 1105 mutex_unlock(&lock);
a1a733f6
KK		 1106 if (ret)
1107 goto release_conn_id;
e51060f0
SH		 1108
1109 conn_id->cm_id.ib = cm_id;
1110 cm_id->context = conn_id;
1111 cm_id->cm_handler = cma_ib_handler;
1112
a1b1b61f 1113 ret = conn_id->id.event_handler(&conn_id->id, &event);
a1a733f6
KK		 1114 if (!ret)
1115 goto out;
1116
1117 /* Destroy the CM ID by returning a non-zero value. */
1118 conn_id->cm_id.ib = NULL;
1119
1120release_conn_id:
1121 cma_exch(conn_id, CMA_DESTROYING);
8aa08602 1122 cma_enable_remove(conn_id);
a1a733f6
KK		 1123 rdma_destroy_id(&conn_id->id);
1124
e51060f0 1125out:
8aa08602 1126 cma_enable_remove(listen_id);
e51060f0
SH		 1127 return ret;
1128}
1129
1130static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1131{
628e5f6d 1132 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1133}
1134
1135static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1136 struct ib_cm_compare_data *compare)
1137{
1138 struct cma_hdr *cma_data, *cma_mask;
1139 struct sdp_hh *sdp_data, *sdp_mask;
1140 __u32 ip4_addr;
1141 struct in6_addr ip6_addr;
1142
1143 memset(compare, 0, sizeof *compare);
1144 cma_data = (void *) compare->data;
1145 cma_mask = (void *) compare->mask;
1146 sdp_data = (void *) compare->data;
1147 sdp_mask = (void *) compare->mask;
1148
1149 switch (addr->sa_family) {
1150 case AF_INET:
1151 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1152 if (ps == RDMA_PS_SDP) {
1153 sdp_set_ip_ver(sdp_data, 4);
1154 sdp_set_ip_ver(sdp_mask, 0xF);
1155 sdp_data->dst_addr.ip4.addr = ip4_addr;
1156 sdp_mask->dst_addr.ip4.addr = ~0;
1157 } else {
1158 cma_set_ip_ver(cma_data, 4);
1159 cma_set_ip_ver(cma_mask, 0xF);
1160 cma_data->dst_addr.ip4.addr = ip4_addr;
1161 cma_mask->dst_addr.ip4.addr = ~0;
1162 }
1163 break;
1164 case AF_INET6:
1165 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1166 if (ps == RDMA_PS_SDP) {
1167 sdp_set_ip_ver(sdp_data, 6);
1168 sdp_set_ip_ver(sdp_mask, 0xF);
1169 sdp_data->dst_addr.ip6 = ip6_addr;
1170 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1171 sizeof sdp_mask->dst_addr.ip6);
1172 } else {
1173 cma_set_ip_ver(cma_data, 6);
1174 cma_set_ip_ver(cma_mask, 0xF);
1175 cma_data->dst_addr.ip6 = ip6_addr;
1176 memset(&cma_mask->dst_addr.ip6, 0xFF,
1177 sizeof cma_mask->dst_addr.ip6);
1178 }
1179 break;
1180 default:
1181 break;
1182 }
1183}
1184
07ebafba
TT		 1185static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1186{
1187 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1188 struct rdma_cm_event event;
07ebafba
TT		 1189 struct sockaddr_in *sin;
1190 int ret = 0;
1191
be65f086
SH		 1192 if (cma_disable_remove(id_priv, CMA_CONNECT))
1193 return 0;
07ebafba 1194
be65f086 1195 memset(&event, 0, sizeof event);
07ebafba
TT		 1196 switch (iw_event->event) {
1197 case IW_CM_EVENT_CLOSE:
a1b1b61f 1198 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1199 break;
1200 case IW_CM_EVENT_CONNECT_REPLY:
1201 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1202 *sin = iw_event->local_addr;
1203 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1204 *sin = iw_event->remote_addr;
881a045f
SW		 1205 switch (iw_event->status) {
1206 case 0:
a1b1b61f 1207 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1208 break;
1209 case -ECONNRESET:
1210 case -ECONNREFUSED:
1211 event.event = RDMA_CM_EVENT_REJECTED;
1212 break;
1213 case -ETIMEDOUT:
1214 event.event = RDMA_CM_EVENT_UNREACHABLE;
1215 break;
1216 default:
1217 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1218 break;
1219 }
07ebafba
TT		 1220 break;
1221 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1222 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1223 break;
1224 default:
1225 BUG_ON(1);
1226 }
1227
a1b1b61f
SH		 1228 event.status = iw_event->status;
1229 event.param.conn.private_data = iw_event->private_data;
1230 event.param.conn.private_data_len = iw_event->private_data_len;
1231 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1232 if (ret) {
1233 /* Destroy the CM ID by returning a non-zero value. */
1234 id_priv->cm_id.iw = NULL;
1235 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 1236 cma_enable_remove(id_priv);
07ebafba
TT		 1237 rdma_destroy_id(&id_priv->id);
1238 return ret;
1239 }
1240
8aa08602 1241 cma_enable_remove(id_priv);
07ebafba
TT		 1242 return ret;
1243}
1244
1245static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1246 struct iw_cm_event *iw_event)
1247{
1248 struct rdma_cm_id *new_cm_id;
1249 struct rdma_id_private *listen_id, *conn_id;
1250 struct sockaddr_in *sin;
1251 struct net_device *dev = NULL;
a1b1b61f 1252 struct rdma_cm_event event;
07ebafba
TT		 1253 int ret;
1254
1255 listen_id = cm_id->context;
8aa08602
SH		 1256 if (cma_disable_remove(listen_id, CMA_LISTEN))
1257 return -ECONNABORTED;
07ebafba
TT		 1258
1259 /* Create a new RDMA id for the new IW CM ID */
1260 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1261 listen_id->id.context,
1262 RDMA_PS_TCP);
1263 if (!new_cm_id) {
1264 ret = -ENOMEM;
1265 goto out;
1266 }
1267 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1268 atomic_inc(&conn_id->dev_remove);
1269 conn_id->state = CMA_CONNECT;
1270
1271 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
1272 if (!dev) {
1273 ret = -EADDRNOTAVAIL;
8aa08602 1274 cma_enable_remove(conn_id);
07ebafba
TT		 1275 rdma_destroy_id(new_cm_id);
1276 goto out;
1277 }
1278 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1279 if (ret) {
8aa08602 1280 cma_enable_remove(conn_id);
07ebafba
TT		 1281 rdma_destroy_id(new_cm_id);
1282 goto out;
1283 }
1284
61a73c70 1285 mutex_lock(&lock);
07ebafba 1286 ret = cma_acquire_dev(conn_id);
61a73c70 1287 mutex_unlock(&lock);
07ebafba 1288 if (ret) {
8aa08602 1289 cma_enable_remove(conn_id);
07ebafba
TT		 1290 rdma_destroy_id(new_cm_id);
1291 goto out;
1292 }
1293
1294 conn_id->cm_id.iw = cm_id;
1295 cm_id->context = conn_id;
1296 cm_id->cm_handler = cma_iw_handler;
1297
1298 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1299 *sin = iw_event->local_addr;
1300 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1301 *sin = iw_event->remote_addr;
1302
a1b1b61f
SH		 1303 memset(&event, 0, sizeof event);
1304 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1305 event.param.conn.private_data = iw_event->private_data;
1306 event.param.conn.private_data_len = iw_event->private_data_len;
1307 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1308 if (ret) {
1309 /* User wants to destroy the CM ID */
1310 conn_id->cm_id.iw = NULL;
1311 cma_exch(conn_id, CMA_DESTROYING);
8aa08602 1312 cma_enable_remove(conn_id);
07ebafba
TT		 1313 rdma_destroy_id(&conn_id->id);
1314 }
1315
1316out:
1317 if (dev)
1318 dev_put(dev);
8aa08602 1319 cma_enable_remove(listen_id);
07ebafba
TT		 1320 return ret;
1321}
1322
e51060f0
SH		 1323static int cma_ib_listen(struct rdma_id_private *id_priv)
1324{
1325 struct ib_cm_compare_data compare_data;
1326 struct sockaddr *addr;
1327 __be64 svc_id;
1328 int ret;
1329
1330 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1331 id_priv);
1332 if (IS_ERR(id_priv->cm_id.ib))
1333 return PTR_ERR(id_priv->cm_id.ib);
1334
1335 addr = &id_priv->id.route.addr.src_addr;
1336 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1337 if (cma_any_addr(addr))
1338 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1339 else {
1340 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1341 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1342 }
1343
1344 if (ret) {
1345 ib_destroy_cm_id(id_priv->cm_id.ib);
1346 id_priv->cm_id.ib = NULL;
1347 }
1348
1349 return ret;
1350}
1351
07ebafba
TT		 1352static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1353{
1354 int ret;
1355 struct sockaddr_in *sin;
1356
1357 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1358 iw_conn_req_handler,
1359 id_priv);
1360 if (IS_ERR(id_priv->cm_id.iw))
1361 return PTR_ERR(id_priv->cm_id.iw);
1362
1363 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1364 id_priv->cm_id.iw->local_addr = *sin;
1365
1366 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1367
1368 if (ret) {
1369 iw_destroy_cm_id(id_priv->cm_id.iw);
1370 id_priv->cm_id.iw = NULL;
1371 }
1372
1373 return ret;
1374}
1375
e51060f0
SH		 1376static int cma_listen_handler(struct rdma_cm_id *id,
1377 struct rdma_cm_event *event)
1378{
1379 struct rdma_id_private *id_priv = id->context;
1380
1381 id->context = id_priv->id.context;
1382 id->event_handler = id_priv->id.event_handler;
1383 return id_priv->id.event_handler(id, event);
1384}
1385
1386static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1387 struct cma_device *cma_dev)
1388{
1389 struct rdma_id_private *dev_id_priv;
1390 struct rdma_cm_id *id;
1391 int ret;
1392
1393 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1394 if (IS_ERR(id))
1395 return;
1396
1397 dev_id_priv = container_of(id, struct rdma_id_private, id);
1398
1399 dev_id_priv->state = CMA_ADDR_BOUND;
1400 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1401 ip_addr_size(&id_priv->id.route.addr.src_addr));
1402
1403 cma_attach_to_dev(dev_id_priv, cma_dev);
1404 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1405
1406 ret = rdma_listen(id, id_priv->backlog);
1407 if (ret)
1408 goto err;
1409
1410 return;
1411err:
1412 cma_destroy_listen(dev_id_priv);
1413}
1414
1415static void cma_listen_on_all(struct rdma_id_private *id_priv)
1416{
1417 struct cma_device *cma_dev;
1418
1419 mutex_lock(&lock);
1420 list_add_tail(&id_priv->list, &listen_any_list);
1421 list_for_each_entry(cma_dev, &dev_list, list)
1422 cma_listen_on_dev(id_priv, cma_dev);
1423 mutex_unlock(&lock);
1424}
1425
1426static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1427{
1428 struct sockaddr_in addr_in;
1429
1430 memset(&addr_in, 0, sizeof addr_in);
1431 addr_in.sin_family = af;
1432 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1433}
1434
1435int rdma_listen(struct rdma_cm_id *id, int backlog)
1436{
1437 struct rdma_id_private *id_priv;
1438 int ret;
1439
1440 id_priv = container_of(id, struct rdma_id_private, id);
1441 if (id_priv->state == CMA_IDLE) {
1442 ret = cma_bind_any(id, AF_INET);
1443 if (ret)
1444 return ret;
1445 }
1446
1447 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1448 return -EINVAL;
1449
1450 id_priv->backlog = backlog;
1451 if (id->device) {
07ebafba
TT		 1452 switch (rdma_node_get_transport(id->device->node_type)) {
1453 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1454 ret = cma_ib_listen(id_priv);
1455 if (ret)
1456 goto err;
1457 break;
07ebafba
TT		 1458 case RDMA_TRANSPORT_IWARP:
1459 ret = cma_iw_listen(id_priv, backlog);
1460 if (ret)
1461 goto err;
1462 break;
e51060f0
SH		 1463 default:
1464 ret = -ENOSYS;
1465 goto err;
1466 }
1467 } else
1468 cma_listen_on_all(id_priv);
1469
1470 return 0;
1471err:
1472 id_priv->backlog = 0;
1473 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1474 return ret;
1475}
1476EXPORT_SYMBOL(rdma_listen);
1477
a81c994d
SH		 1478void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1479{
1480 struct rdma_id_private *id_priv;
1481
1482 id_priv = container_of(id, struct rdma_id_private, id);
1483 id_priv->tos = (u8) tos;
1484}
1485EXPORT_SYMBOL(rdma_set_service_type);
1486
e51060f0
SH		 1487static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1488 void *context)
1489{
1490 struct cma_work *work = context;
1491 struct rdma_route *route;
1492
1493 route = &work->id->id.route;
1494
1495 if (!status) {
1496 route->num_paths = 1;
1497 *route->path_rec = *path_rec;
1498 } else {
1499 work->old_state = CMA_ROUTE_QUERY;
1500 work->new_state = CMA_ADDR_RESOLVED;
1501 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1502 work->event.status = status;
e51060f0
SH		 1503 }
1504
1505 queue_work(cma_wq, &work->work);
1506}
1507
1508static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1509 struct cma_work *work)
1510{
a81c994d 1511 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1512 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1513 ib_sa_comp_mask comp_mask;
1514 struct sockaddr_in6 *sin6;
e51060f0
SH		 1515
1516 memset(&path_rec, 0, sizeof path_rec);
a81c994d
SH		 1517 ib_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1518 ib_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1519 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1520 path_rec.numb_path = 1;
962063e6 1521 path_rec.reversible = 1;
a81c994d
SH		 1522 path_rec.service_id = cma_get_service_id(id_priv->id.ps, &addr->dst_addr);
1523
1524 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1525 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1526 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1527
1528 if (addr->src_addr.sa_family == AF_INET) {
1529 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1530 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1531 } else {
1532 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1533 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1534 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1535 }
e51060f0 1536
c1a0b23b 1537 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1538 id_priv->id.port_num, &path_rec,
1539 comp_mask, timeout_ms,
1540 GFP_KERNEL, cma_query_handler,
1541 work, &id_priv->query);
e51060f0
SH		 1542
1543 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1544}
1545
c4028958 1546static void cma_work_handler(struct work_struct *_work)
e51060f0 1547{
c4028958 1548 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1549 struct rdma_id_private *id_priv = work->id;
1550 int destroy = 0;
1551
1552 atomic_inc(&id_priv->dev_remove);
1553 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1554 goto out;
1555
1556 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1557 cma_exch(id_priv, CMA_DESTROYING);
1558 destroy = 1;
1559 }
1560out:
8aa08602 1561 cma_enable_remove(id_priv);
e51060f0
SH		 1562 cma_deref_id(id_priv);
1563 if (destroy)
1564 rdma_destroy_id(&id_priv->id);
1565 kfree(work);
1566}
1567
1568static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1569{
1570 struct rdma_route *route = &id_priv->id.route;
1571 struct cma_work *work;
1572 int ret;
1573
1574 work = kzalloc(sizeof *work, GFP_KERNEL);
1575 if (!work)
1576 return -ENOMEM;
1577
1578 work->id = id_priv;
c4028958 1579 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1580 work->old_state = CMA_ROUTE_QUERY;
1581 work->new_state = CMA_ROUTE_RESOLVED;
1582 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1583
1584 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1585 if (!route->path_rec) {
1586 ret = -ENOMEM;
1587 goto err1;
1588 }
1589
1590 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1591 if (ret)
1592 goto err2;
1593
1594 return 0;
1595err2:
1596 kfree(route->path_rec);
1597 route->path_rec = NULL;
1598err1:
1599 kfree(work);
1600 return ret;
1601}
1602
1603int rdma_set_ib_paths(struct rdma_cm_id *id,
1604 struct ib_sa_path_rec *path_rec, int num_paths)
1605{
1606 struct rdma_id_private *id_priv;
1607 int ret;
1608
1609 id_priv = container_of(id, struct rdma_id_private, id);
1610 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1611 return -EINVAL;
1612
1613 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1614 if (!id->route.path_rec) {
1615 ret = -ENOMEM;
1616 goto err;
1617 }
1618
1619 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1620 return 0;
1621err:
1622 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1623 return ret;
1624}
1625EXPORT_SYMBOL(rdma_set_ib_paths);
1626
07ebafba
TT		 1627static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1628{
1629 struct cma_work *work;
1630
1631 work = kzalloc(sizeof *work, GFP_KERNEL);
1632 if (!work)
1633 return -ENOMEM;
1634
1635 work->id = id_priv;
c4028958 1636 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1637 work->old_state = CMA_ROUTE_QUERY;
1638 work->new_state = CMA_ROUTE_RESOLVED;
1639 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1640 queue_work(cma_wq, &work->work);
1641 return 0;
1642}
1643
e51060f0
SH		 1644int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1645{
1646 struct rdma_id_private *id_priv;
1647 int ret;
1648
1649 id_priv = container_of(id, struct rdma_id_private, id);
1650 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1651 return -EINVAL;
1652
1653 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1654 switch (rdma_node_get_transport(id->device->node_type)) {
1655 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1656 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1657 break;
07ebafba
TT		 1658 case RDMA_TRANSPORT_IWARP:
1659 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1660 break;
e51060f0
SH		 1661 default:
1662 ret = -ENOSYS;
1663 break;
1664 }
1665 if (ret)
1666 goto err;
1667
1668 return 0;
1669err:
1670 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1671 cma_deref_id(id_priv);
1672 return ret;
1673}
1674EXPORT_SYMBOL(rdma_resolve_route);
1675
1676static int cma_bind_loopback(struct rdma_id_private *id_priv)
1677{
1678 struct cma_device *cma_dev;
1679 struct ib_port_attr port_attr;
f0ee3404 1680 union ib_gid gid;
e51060f0
SH		 1681 u16 pkey;
1682 int ret;
1683 u8 p;
1684
1685 mutex_lock(&lock);
e82153b5
KK		 1686 if (list_empty(&dev_list)) {
1687 ret = -ENODEV;
1688 goto out;
1689 }
e51060f0
SH		 1690 list_for_each_entry(cma_dev, &dev_list, list)
1691 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1692 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1693 port_attr.state == IB_PORT_ACTIVE)
1694 goto port_found;
1695
e82153b5
KK		 1696 p = 1;
1697 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1698
1699port_found:
f0ee3404 1700 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1701 if (ret)
1702 goto out;
1703
1704 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1705 if (ret)
1706 goto out;
1707
f0ee3404 1708 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1709 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1710 id_priv->id.port_num = p;
1711 cma_attach_to_dev(id_priv, cma_dev);
1712out:
1713 mutex_unlock(&lock);
1714 return ret;
1715}
1716
1717static void addr_handler(int status, struct sockaddr *src_addr,
1718 struct rdma_dev_addr *dev_addr, void *context)
1719{
1720 struct rdma_id_private *id_priv = context;
a1b1b61f 1721 struct rdma_cm_event event;
e51060f0 1722
a1b1b61f 1723 memset(&event, 0, sizeof event);
e51060f0 1724 atomic_inc(&id_priv->dev_remove);
61a73c70
SH		 1725
1726 /*
1727 * Grab mutex to block rdma_destroy_id() from removing the device while
1728 * we're trying to acquire it.
1729 */
1730 mutex_lock(&lock);
1731 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1732 mutex_unlock(&lock);
1733 goto out;
1734 }
1735
1736 if (!status && !id_priv->cma_dev)
e51060f0 1737 status = cma_acquire_dev(id_priv);
61a73c70 1738 mutex_unlock(&lock);
e51060f0
SH		 1739
1740 if (status) {
61a73c70 1741 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1742 goto out;
a1b1b61f
SH		 1743 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1744 event.status = status;
e51060f0 1745 } else {
e51060f0
SH		 1746 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1747 ip_addr_size(src_addr));
a1b1b61f 1748 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1749 }
1750
a1b1b61f 1751 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1752 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 1753 cma_enable_remove(id_priv);
e51060f0
SH		 1754 cma_deref_id(id_priv);
1755 rdma_destroy_id(&id_priv->id);
1756 return;
1757 }
1758out:
8aa08602 1759 cma_enable_remove(id_priv);
e51060f0
SH		 1760 cma_deref_id(id_priv);
1761}
1762
1763static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1764{
1765 struct cma_work *work;
1766 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1767 union ib_gid gid;
e51060f0
SH		 1768 int ret;
1769
1770 work = kzalloc(sizeof *work, GFP_KERNEL);
1771 if (!work)
1772 return -ENOMEM;
1773
1774 if (!id_priv->cma_dev) {
1775 ret = cma_bind_loopback(id_priv);
1776 if (ret)
1777 goto err;
1778 }
1779
f0ee3404
MT		 1780 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1781 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1782
1783 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1784 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1785 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1786 src_in->sin_family = dst_in->sin_family;
1787 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1788 }
1789
1790 work->id = id_priv;
c4028958 1791 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1792 work->old_state = CMA_ADDR_QUERY;
1793 work->new_state = CMA_ADDR_RESOLVED;
1794 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1795 queue_work(cma_wq, &work->work);
1796 return 0;
1797err:
1798 kfree(work);
1799 return ret;
1800}
1801
1802static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1803 struct sockaddr *dst_addr)
1804{
1805 if (src_addr && src_addr->sa_family)
1806 return rdma_bind_addr(id, src_addr);
1807 else
1808 return cma_bind_any(id, dst_addr->sa_family);
1809}
1810
1811int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1812 struct sockaddr *dst_addr, int timeout_ms)
1813{
1814 struct rdma_id_private *id_priv;
1815 int ret;
1816
1817 id_priv = container_of(id, struct rdma_id_private, id);
1818 if (id_priv->state == CMA_IDLE) {
1819 ret = cma_bind_addr(id, src_addr, dst_addr);
1820 if (ret)
1821 return ret;
1822 }
1823
1824 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1825 return -EINVAL;
1826
1827 atomic_inc(&id_priv->refcount);
1828 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1829 if (cma_any_addr(dst_addr))
1830 ret = cma_resolve_loopback(id_priv);
1831 else
7a118df3
SH		 1832 ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr,
1833 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1834 timeout_ms, addr_handler, id_priv);
1835 if (ret)
1836 goto err;
1837
1838 return 0;
1839err:
1840 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1841 cma_deref_id(id_priv);
1842 return ret;
1843}
1844EXPORT_SYMBOL(rdma_resolve_addr);
1845
1846static void cma_bind_port(struct rdma_bind_list *bind_list,
1847 struct rdma_id_private *id_priv)
1848{
1849 struct sockaddr_in *sin;
1850
1851 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1852 sin->sin_port = htons(bind_list->port);
1853 id_priv->bind_list = bind_list;
1854 hlist_add_head(&id_priv->node, &bind_list->owners);
1855}
1856
1857static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1858 unsigned short snum)
1859{
1860 struct rdma_bind_list *bind_list;
aedec080 1861 int port, ret;
e51060f0 1862
cb164b8c 1863 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 1864 if (!bind_list)
1865 return -ENOMEM;
1866
aedec080
SH		 1867 do {
1868 ret = idr_get_new_above(ps, bind_list, snum, &port);
1869 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1870
1871 if (ret)
1872 goto err1;
1873
1874 if (port != snum) {
1875 ret = -EADDRNOTAVAIL;
1876 goto err2;
1877 }
1878
1879 bind_list->ps = ps;
1880 bind_list->port = (unsigned short) port;
1881 cma_bind_port(bind_list, id_priv);
1882 return 0;
1883err2:
1884 idr_remove(ps, port);
1885err1:
1886 kfree(bind_list);
1887 return ret;
1888}
e51060f0 1889
aedec080
SH		 1890static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1891{
1892 struct rdma_bind_list *bind_list;
1893 int port, ret;
1894
1895 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1896 if (!bind_list)
1897 return -ENOMEM;
1898
1899retry:
e51060f0 1900 do {
aedec080 1901 ret = idr_get_new_above(ps, bind_list, next_port, &port);
e51060f0
SH		 1902 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1903
1904 if (ret)
aedec080 1905 goto err1;
e51060f0 1906
aedec080
SH		 1907 if (port > sysctl_local_port_range[1]) {
1908 if (next_port != sysctl_local_port_range[0]) {
1909 idr_remove(ps, port);
1910 next_port = sysctl_local_port_range[0];
1911 goto retry;
1912 }
e51060f0 1913 ret = -EADDRNOTAVAIL;
aedec080 1914 goto err2;
e51060f0
SH		 1915 }
1916
aedec080
SH		 1917 if (port == sysctl_local_port_range[1])
1918 next_port = sysctl_local_port_range[0];
1919 else
1920 next_port = port + 1;
1921
e51060f0
SH		 1922 bind_list->ps = ps;
1923 bind_list->port = (unsigned short) port;
1924 cma_bind_port(bind_list, id_priv);
1925 return 0;
aedec080
SH		 1926err2:
1927 idr_remove(ps, port);
1928err1:
e51060f0
SH		 1929 kfree(bind_list);
1930 return ret;
1931}
1932
1933static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1934{
1935 struct rdma_id_private *cur_id;
1936 struct sockaddr_in *sin, *cur_sin;
1937 struct rdma_bind_list *bind_list;
1938 struct hlist_node *node;
1939 unsigned short snum;
1940
1941 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1942 snum = ntohs(sin->sin_port);
1943 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1944 return -EACCES;
1945
1946 bind_list = idr_find(ps, snum);
1947 if (!bind_list)
1948 return cma_alloc_port(ps, id_priv, snum);
1949
1950 /*
1951 * We don't support binding to any address if anyone is bound to
1952 * a specific address on the same port.
1953 */
1954 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1955 return -EADDRNOTAVAIL;
1956
1957 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
1958 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
1959 return -EADDRNOTAVAIL;
3cd96564 1960
e51060f0
SH		 1961 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
1962 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
1963 return -EADDRINUSE;
1964 }
1965
1966 cma_bind_port(bind_list, id_priv);
1967 return 0;
1968}
1969
1970static int cma_get_port(struct rdma_id_private *id_priv)
1971{
1972 struct idr *ps;
1973 int ret;
1974
1975 switch (id_priv->id.ps) {
1976 case RDMA_PS_SDP:
1977 ps = &sdp_ps;
1978 break;
1979 case RDMA_PS_TCP:
1980 ps = &tcp_ps;
1981 break;
628e5f6d
SH		 1982 case RDMA_PS_UDP:
1983 ps = &udp_ps;
1984 break;
c8f6a362
SH		 1985 case RDMA_PS_IPOIB:
1986 ps = &ipoib_ps;
1987 break;
e51060f0
SH		 1988 default:
1989 return -EPROTONOSUPPORT;
1990 }
1991
1992 mutex_lock(&lock);
1993 if (cma_any_port(&id_priv->id.route.addr.src_addr))
aedec080 1994 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 1995 else
1996 ret = cma_use_port(ps, id_priv);
1997 mutex_unlock(&lock);
1998
1999 return ret;
2000}
2001
2002int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2003{
2004 struct rdma_id_private *id_priv;
2005 int ret;
2006
2007 if (addr->sa_family != AF_INET)
2008 return -EAFNOSUPPORT;
2009
2010 id_priv = container_of(id, struct rdma_id_private, id);
2011 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2012 return -EINVAL;
2013
2014 if (!cma_any_addr(addr)) {
2015 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2016 if (ret)
255d0c14
KK		 2017 goto err1;
2018
2019 mutex_lock(&lock);
2020 ret = cma_acquire_dev(id_priv);
2021 mutex_unlock(&lock);
2022 if (ret)
2023 goto err1;
e51060f0
SH		 2024 }
2025
2026 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2027 ret = cma_get_port(id_priv);
2028 if (ret)
255d0c14 2029 goto err2;
e51060f0
SH		 2030
2031 return 0;
255d0c14
KK		 2032err2:
2033 if (!cma_any_addr(addr)) {
2034 mutex_lock(&lock);
2035 cma_detach_from_dev(id_priv);
2036 mutex_unlock(&lock);
2037 }
2038err1:
e51060f0
SH		 2039 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2040 return ret;
2041}
2042EXPORT_SYMBOL(rdma_bind_addr);
2043
2044static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2045 struct rdma_route *route)
2046{
2047 struct sockaddr_in *src4, *dst4;
2048 struct cma_hdr *cma_hdr;
2049 struct sdp_hh *sdp_hdr;
2050
2051 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2052 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2053
2054 switch (ps) {
2055 case RDMA_PS_SDP:
2056 sdp_hdr = hdr;
2057 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2058 return -EINVAL;
2059 sdp_set_ip_ver(sdp_hdr, 4);
2060 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2061 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2062 sdp_hdr->port = src4->sin_port;
2063 break;
2064 default:
2065 cma_hdr = hdr;
2066 cma_hdr->cma_version = CMA_VERSION;
2067 cma_set_ip_ver(cma_hdr, 4);
2068 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2069 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2070 cma_hdr->port = src4->sin_port;
2071 break;
2072 }
2073 return 0;
2074}
2075
628e5f6d
SH		 2076static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2077 struct ib_cm_event *ib_event)
2078{
2079 struct rdma_id_private *id_priv = cm_id->context;
2080 struct rdma_cm_event event;
2081 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2082 int ret = 0;
2083
8aa08602
SH		 2084 if (cma_disable_remove(id_priv, CMA_CONNECT))
2085 return 0;
628e5f6d 2086
8aa08602 2087 memset(&event, 0, sizeof event);
628e5f6d
SH		 2088 switch (ib_event->event) {
2089 case IB_CM_SIDR_REQ_ERROR:
2090 event.event = RDMA_CM_EVENT_UNREACHABLE;
2091 event.status = -ETIMEDOUT;
2092 break;
2093 case IB_CM_SIDR_REP_RECEIVED:
2094 event.param.ud.private_data = ib_event->private_data;
2095 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2096 if (rep->status != IB_SIDR_SUCCESS) {
2097 event.event = RDMA_CM_EVENT_UNREACHABLE;
2098 event.status = ib_event->param.sidr_rep_rcvd.status;
2099 break;
2100 }
c8f6a362 2101 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2102 event.event = RDMA_CM_EVENT_UNREACHABLE;
2103 event.status = -EINVAL;
2104 break;
2105 }
2106 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2107 id_priv->id.route.path_rec,
2108 &event.param.ud.ah_attr);
2109 event.param.ud.qp_num = rep->qpn;
2110 event.param.ud.qkey = rep->qkey;
2111 event.event = RDMA_CM_EVENT_ESTABLISHED;
2112 event.status = 0;
2113 break;
2114 default:
2115 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
2116 ib_event->event);
2117 goto out;
2118 }
2119
2120 ret = id_priv->id.event_handler(&id_priv->id, &event);
2121 if (ret) {
2122 /* Destroy the CM ID by returning a non-zero value. */
2123 id_priv->cm_id.ib = NULL;
2124 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 2125 cma_enable_remove(id_priv);
628e5f6d
SH		 2126 rdma_destroy_id(&id_priv->id);
2127 return ret;
2128 }
2129out:
8aa08602 2130 cma_enable_remove(id_priv);
628e5f6d
SH		 2131 return ret;
2132}
2133
2134static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2135 struct rdma_conn_param *conn_param)
2136{
2137 struct ib_cm_sidr_req_param req;
2138 struct rdma_route *route;
2139 int ret;
2140
2141 req.private_data_len = sizeof(struct cma_hdr) +
2142 conn_param->private_data_len;
2143 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2144 if (!req.private_data)
2145 return -ENOMEM;
2146
2147 if (conn_param->private_data && conn_param->private_data_len)
2148 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2149 conn_param->private_data, conn_param->private_data_len);
2150
2151 route = &id_priv->id.route;
2152 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2153 if (ret)
2154 goto out;
2155
2156 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2157 cma_sidr_rep_handler, id_priv);
2158 if (IS_ERR(id_priv->cm_id.ib)) {
2159 ret = PTR_ERR(id_priv->cm_id.ib);
2160 goto out;
2161 }
2162
2163 req.path = route->path_rec;
2164 req.service_id = cma_get_service_id(id_priv->id.ps,
2165 &route->addr.dst_addr);
2166 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2167 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2168
2169 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2170 if (ret) {
2171 ib_destroy_cm_id(id_priv->cm_id.ib);
2172 id_priv->cm_id.ib = NULL;
2173 }
2174out:
2175 kfree(req.private_data);
2176 return ret;
2177}
2178
e51060f0
SH		 2179static int cma_connect_ib(struct rdma_id_private *id_priv,
2180 struct rdma_conn_param *conn_param)
2181{
2182 struct ib_cm_req_param req;
2183 struct rdma_route *route;
2184 void *private_data;
2185 int offset, ret;
2186
2187 memset(&req, 0, sizeof req);
2188 offset = cma_user_data_offset(id_priv->id.ps);
2189 req.private_data_len = offset + conn_param->private_data_len;
2190 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2191 if (!private_data)
2192 return -ENOMEM;
2193
2194 if (conn_param->private_data && conn_param->private_data_len)
2195 memcpy(private_data + offset, conn_param->private_data,
2196 conn_param->private_data_len);
2197
2198 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2199 id_priv);
2200 if (IS_ERR(id_priv->cm_id.ib)) {
2201 ret = PTR_ERR(id_priv->cm_id.ib);
2202 goto out;
2203 }
2204
2205 route = &id_priv->id.route;
2206 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2207 if (ret)
2208 goto out;
2209 req.private_data = private_data;
2210
2211 req.primary_path = &route->path_rec[0];
2212 if (route->num_paths == 2)
2213 req.alternate_path = &route->path_rec[1];
2214
2215 req.service_id = cma_get_service_id(id_priv->id.ps,
2216 &route->addr.dst_addr);
2217 req.qp_num = id_priv->qp_num;
9b2e9c0c 2218 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2219 req.starting_psn = id_priv->seq_num;
2220 req.responder_resources = conn_param->responder_resources;
2221 req.initiator_depth = conn_param->initiator_depth;
2222 req.flow_control = conn_param->flow_control;
2223 req.retry_count = conn_param->retry_count;
2224 req.rnr_retry_count = conn_param->rnr_retry_count;
2225 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2226 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2227 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2228 req.srq = id_priv->srq ? 1 : 0;
2229
2230 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2231out:
675a027c
KK		 2232 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2233 ib_destroy_cm_id(id_priv->cm_id.ib);
2234 id_priv->cm_id.ib = NULL;
2235 }
2236
e51060f0
SH		 2237 kfree(private_data);
2238 return ret;
2239}
2240
07ebafba
TT		 2241static int cma_connect_iw(struct rdma_id_private *id_priv,
2242 struct rdma_conn_param *conn_param)
2243{
2244 struct iw_cm_id *cm_id;
2245 struct sockaddr_in* sin;
2246 int ret;
2247 struct iw_cm_conn_param iw_param;
2248
2249 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2250 if (IS_ERR(cm_id)) {
2251 ret = PTR_ERR(cm_id);
2252 goto out;
2253 }
2254
2255 id_priv->cm_id.iw = cm_id;
2256
2257 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2258 cm_id->local_addr = *sin;
2259
2260 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2261 cm_id->remote_addr = *sin;
2262
2263 ret = cma_modify_qp_rtr(&id_priv->id);
675a027c
KK		 2264 if (ret)
2265 goto out;
07ebafba
TT		 2266
2267 iw_param.ord = conn_param->initiator_depth;
2268 iw_param.ird = conn_param->responder_resources;
2269 iw_param.private_data = conn_param->private_data;
2270 iw_param.private_data_len = conn_param->private_data_len;
2271 if (id_priv->id.qp)
2272 iw_param.qpn = id_priv->qp_num;
2273 else
2274 iw_param.qpn = conn_param->qp_num;
2275 ret = iw_cm_connect(cm_id, &iw_param);
2276out:
675a027c
KK		 2277 if (ret && !IS_ERR(cm_id)) {
2278 iw_destroy_cm_id(cm_id);
2279 id_priv->cm_id.iw = NULL;
2280 }
07ebafba
TT		 2281 return ret;
2282}
2283
e51060f0
SH		 2284int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2285{
2286 struct rdma_id_private *id_priv;
2287 int ret;
2288
2289 id_priv = container_of(id, struct rdma_id_private, id);
2290 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2291 return -EINVAL;
2292
2293 if (!id->qp) {
2294 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2295 id_priv->srq = conn_param->srq;
2296 }
2297
07ebafba
TT		 2298 switch (rdma_node_get_transport(id->device->node_type)) {
2299 case RDMA_TRANSPORT_IB:
c8f6a362 2300 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2301 ret = cma_resolve_ib_udp(id_priv, conn_param);
2302 else
2303 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2304 break;
07ebafba
TT		 2305 case RDMA_TRANSPORT_IWARP:
2306 ret = cma_connect_iw(id_priv, conn_param);
2307 break;
e51060f0
SH		 2308 default:
2309 ret = -ENOSYS;
2310 break;
2311 }
2312 if (ret)
2313 goto err;
2314
2315 return 0;
2316err:
2317 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2318 return ret;
2319}
2320EXPORT_SYMBOL(rdma_connect);
2321
2322static int cma_accept_ib(struct rdma_id_private *id_priv,
2323 struct rdma_conn_param *conn_param)
2324{
2325 struct ib_cm_rep_param rep;
0fe313b0
SH		 2326 struct ib_qp_attr qp_attr;
2327 int qp_attr_mask, ret;
e51060f0 2328
0fe313b0
SH		 2329 if (id_priv->id.qp) {
2330 ret = cma_modify_qp_rtr(&id_priv->id);
2331 if (ret)
2332 goto out;
2333
2334 qp_attr.qp_state = IB_QPS_RTS;
2335 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr,
2336 &qp_attr_mask);
2337 if (ret)
2338 goto out;
2339
2340 qp_attr.max_rd_atomic = conn_param->initiator_depth;
2341 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
2342 if (ret)
2343 goto out;
2344 }
e51060f0
SH		 2345
2346 memset(&rep, 0, sizeof rep);
2347 rep.qp_num = id_priv->qp_num;
2348 rep.starting_psn = id_priv->seq_num;
2349 rep.private_data = conn_param->private_data;
2350 rep.private_data_len = conn_param->private_data_len;
2351 rep.responder_resources = conn_param->responder_resources;
2352 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2353 rep.failover_accepted = 0;
2354 rep.flow_control = conn_param->flow_control;
2355 rep.rnr_retry_count = conn_param->rnr_retry_count;
2356 rep.srq = id_priv->srq ? 1 : 0;
2357
0fe313b0
SH		 2358 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2359out:
2360 return ret;
e51060f0
SH		 2361}
2362
07ebafba
TT		 2363static int cma_accept_iw(struct rdma_id_private *id_priv,
2364 struct rdma_conn_param *conn_param)
2365{
2366 struct iw_cm_conn_param iw_param;
2367 int ret;
2368
2369 ret = cma_modify_qp_rtr(&id_priv->id);
2370 if (ret)
2371 return ret;
2372
2373 iw_param.ord = conn_param->initiator_depth;
2374 iw_param.ird = conn_param->responder_resources;
2375 iw_param.private_data = conn_param->private_data;
2376 iw_param.private_data_len = conn_param->private_data_len;
2377 if (id_priv->id.qp) {
2378 iw_param.qpn = id_priv->qp_num;
2379 } else
2380 iw_param.qpn = conn_param->qp_num;
2381
2382 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2383}
2384
628e5f6d
SH		 2385static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2386 enum ib_cm_sidr_status status,
2387 const void *private_data, int private_data_len)
2388{
2389 struct ib_cm_sidr_rep_param rep;
2390
2391 memset(&rep, 0, sizeof rep);
2392 rep.status = status;
2393 if (status == IB_SIDR_SUCCESS) {
2394 rep.qp_num = id_priv->qp_num;
c8f6a362 2395 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2396 }
2397 rep.private_data = private_data;
2398 rep.private_data_len = private_data_len;
2399
2400 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2401}
2402
e51060f0
SH		 2403int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2404{
2405 struct rdma_id_private *id_priv;
2406 int ret;
2407
2408 id_priv = container_of(id, struct rdma_id_private, id);
2409 if (!cma_comp(id_priv, CMA_CONNECT))
2410 return -EINVAL;
2411
2412 if (!id->qp && conn_param) {
2413 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2414 id_priv->srq = conn_param->srq;
2415 }
2416
07ebafba
TT		 2417 switch (rdma_node_get_transport(id->device->node_type)) {
2418 case RDMA_TRANSPORT_IB:
c8f6a362 2419 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2420 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2421 conn_param->private_data,
2422 conn_param->private_data_len);
2423 else if (conn_param)
e51060f0
SH		 2424 ret = cma_accept_ib(id_priv, conn_param);
2425 else
2426 ret = cma_rep_recv(id_priv);
2427 break;
07ebafba
TT		 2428 case RDMA_TRANSPORT_IWARP:
2429 ret = cma_accept_iw(id_priv, conn_param);
2430 break;
e51060f0
SH		 2431 default:
2432 ret = -ENOSYS;
2433 break;
2434 }
2435
2436 if (ret)
2437 goto reject;
2438
2439 return 0;
2440reject:
2441 cma_modify_qp_err(id);
2442 rdma_reject(id, NULL, 0);
2443 return ret;
2444}
2445EXPORT_SYMBOL(rdma_accept);
2446
0fe313b0
SH		 2447int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2448{
2449 struct rdma_id_private *id_priv;
2450 int ret;
2451
2452 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2453 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2454 return -EINVAL;
2455
2456 switch (id->device->node_type) {
2457 case RDMA_NODE_IB_CA:
2458 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2459 break;
2460 default:
2461 ret = 0;
2462 break;
2463 }
2464 return ret;
2465}
2466EXPORT_SYMBOL(rdma_notify);
2467
e51060f0
SH		 2468int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2469 u8 private_data_len)
2470{
2471 struct rdma_id_private *id_priv;
2472 int ret;
2473
2474 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2475 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2476 return -EINVAL;
2477
07ebafba
TT		 2478 switch (rdma_node_get_transport(id->device->node_type)) {
2479 case RDMA_TRANSPORT_IB:
c8f6a362 2480 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2481 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2482 private_data, private_data_len);
2483 else
2484 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2485 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2486 0, private_data, private_data_len);
e51060f0 2487 break;
07ebafba
TT		 2488 case RDMA_TRANSPORT_IWARP:
2489 ret = iw_cm_reject(id_priv->cm_id.iw,
2490 private_data, private_data_len);
2491 break;
e51060f0
SH		 2492 default:
2493 ret = -ENOSYS;
2494 break;
2495 }
2496 return ret;
2497}
2498EXPORT_SYMBOL(rdma_reject);
2499
2500int rdma_disconnect(struct rdma_cm_id *id)
2501{
2502 struct rdma_id_private *id_priv;
2503 int ret;
2504
2505 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2506 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2507 return -EINVAL;
2508
07ebafba
TT		 2509 switch (rdma_node_get_transport(id->device->node_type)) {
2510 case RDMA_TRANSPORT_IB:
2511 ret = cma_modify_qp_err(id);
2512 if (ret)
2513 goto out;
e51060f0
SH		 2514 /* Initiate or respond to a disconnect. */
2515 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2516 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2517 break;
07ebafba
TT		 2518 case RDMA_TRANSPORT_IWARP:
2519 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2520 break;
e51060f0 2521 default:
07ebafba 2522 ret = -EINVAL;
e51060f0
SH		 2523 break;
2524 }
2525out:
2526 return ret;
2527}
2528EXPORT_SYMBOL(rdma_disconnect);
2529
c8f6a362
SH		 2530static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2531{
2532 struct rdma_id_private *id_priv;
2533 struct cma_multicast *mc = multicast->context;
2534 struct rdma_cm_event event;
2535 int ret;
2536
2537 id_priv = mc->id_priv;
8aa08602
SH		 2538 if (cma_disable_remove(id_priv, CMA_ADDR_BOUND) &&
2539 cma_disable_remove(id_priv, CMA_ADDR_RESOLVED))
2540 return 0;
c8f6a362
SH		 2541
2542 if (!status && id_priv->id.qp)
2543 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2544 multicast->rec.mlid);
2545
2546 memset(&event, 0, sizeof event);
2547 event.status = status;
2548 event.param.ud.private_data = mc->context;
2549 if (!status) {
2550 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2551 ib_init_ah_from_mcmember(id_priv->id.device,
2552 id_priv->id.port_num, &multicast->rec,
2553 &event.param.ud.ah_attr);
2554 event.param.ud.qp_num = 0xFFFFFF;
2555 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2556 } else
2557 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2558
2559 ret = id_priv->id.event_handler(&id_priv->id, &event);
2560 if (ret) {
2561 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 2562 cma_enable_remove(id_priv);
c8f6a362
SH		 2563 rdma_destroy_id(&id_priv->id);
2564 return 0;
2565 }
8aa08602
SH		 2566
2567 cma_enable_remove(id_priv);
c8f6a362
SH		 2568 return 0;
2569}
2570
2571static void cma_set_mgid(struct rdma_id_private *id_priv,
2572 struct sockaddr *addr, union ib_gid *mgid)
2573{
2574 unsigned char mc_map[MAX_ADDR_LEN];
2575 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2576 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2577 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2578
2579 if (cma_any_addr(addr)) {
2580 memset(mgid, 0, sizeof *mgid);
2581 } else if ((addr->sa_family == AF_INET6) &&
2582 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) ==
2583 0xFF10A01B)) {
2584 /* IPv6 address is an SA assigned MGID. */
2585 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2586 } else {
2587 ip_ib_mc_map(sin->sin_addr.s_addr, mc_map);
2588 if (id_priv->id.ps == RDMA_PS_UDP)
2589 mc_map[7] = 0x01; /* Use RDMA CM signature */
2590 mc_map[8] = ib_addr_get_pkey(dev_addr) >> 8;
2591 mc_map[9] = (unsigned char) ib_addr_get_pkey(dev_addr);
2592 *mgid = *(union ib_gid *) (mc_map + 4);
2593 }
2594}
2595
2596static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2597 struct cma_multicast *mc)
2598{
2599 struct ib_sa_mcmember_rec rec;
2600 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2601 ib_sa_comp_mask comp_mask;
2602 int ret;
2603
2604 ib_addr_get_mgid(dev_addr, &rec.mgid);
2605 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2606 &rec.mgid, &rec);
2607 if (ret)
2608 return ret;
2609
2610 cma_set_mgid(id_priv, &mc->addr, &rec.mgid);
2611 if (id_priv->id.ps == RDMA_PS_UDP)
2612 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2613 ib_addr_get_sgid(dev_addr, &rec.port_gid);
2614 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2615 rec.join_state = 1;
2616
2617 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2618 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2619 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2620 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2621 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2622
2623 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2624 id_priv->id.port_num, &rec,
2625 comp_mask, GFP_KERNEL,
2626 cma_ib_mc_handler, mc);
2627 if (IS_ERR(mc->multicast.ib))
2628 return PTR_ERR(mc->multicast.ib);
2629
2630 return 0;
2631}
2632
2633int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2634 void *context)
2635{
2636 struct rdma_id_private *id_priv;
2637 struct cma_multicast *mc;
2638 int ret;
2639
2640 id_priv = container_of(id, struct rdma_id_private, id);
2641 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2642 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2643 return -EINVAL;
2644
2645 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2646 if (!mc)
2647 return -ENOMEM;
2648
2649 memcpy(&mc->addr, addr, ip_addr_size(addr));
2650 mc->context = context;
2651 mc->id_priv = id_priv;
2652
2653 spin_lock(&id_priv->lock);
2654 list_add(&mc->list, &id_priv->mc_list);
2655 spin_unlock(&id_priv->lock);
2656
2657 switch (rdma_node_get_transport(id->device->node_type)) {
2658 case RDMA_TRANSPORT_IB:
2659 ret = cma_join_ib_multicast(id_priv, mc);
2660 break;
2661 default:
2662 ret = -ENOSYS;
2663 break;
2664 }
2665
2666 if (ret) {
2667 spin_lock_irq(&id_priv->lock);
2668 list_del(&mc->list);
2669 spin_unlock_irq(&id_priv->lock);
2670 kfree(mc);
2671 }
2672 return ret;
2673}
2674EXPORT_SYMBOL(rdma_join_multicast);
2675
2676void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2677{
2678 struct rdma_id_private *id_priv;
2679 struct cma_multicast *mc;
2680
2681 id_priv = container_of(id, struct rdma_id_private, id);
2682 spin_lock_irq(&id_priv->lock);
2683 list_for_each_entry(mc, &id_priv->mc_list, list) {
2684 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2685 list_del(&mc->list);
2686 spin_unlock_irq(&id_priv->lock);
2687
2688 if (id->qp)
2689 ib_detach_mcast(id->qp,
2690 &mc->multicast.ib->rec.mgid,
2691 mc->multicast.ib->rec.mlid);
2692 ib_sa_free_multicast(mc->multicast.ib);
2693 kfree(mc);
2694 return;
2695 }
2696 }
2697 spin_unlock_irq(&id_priv->lock);
2698}
2699EXPORT_SYMBOL(rdma_leave_multicast);
2700
e51060f0
SH		 2701static void cma_add_one(struct ib_device *device)
2702{
2703 struct cma_device *cma_dev;
2704 struct rdma_id_private *id_priv;
2705
2706 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2707 if (!cma_dev)
2708 return;
2709
2710 cma_dev->device = device;
e51060f0
SH		 2711
2712 init_completion(&cma_dev->comp);
2713 atomic_set(&cma_dev->refcount, 1);
2714 INIT_LIST_HEAD(&cma_dev->id_list);
2715 ib_set_client_data(device, &cma_client, cma_dev);
2716
2717 mutex_lock(&lock);
2718 list_add_tail(&cma_dev->list, &dev_list);
2719 list_for_each_entry(id_priv, &listen_any_list, list)
2720 cma_listen_on_dev(id_priv, cma_dev);
2721 mutex_unlock(&lock);
e51060f0
SH		 2722}
2723
2724static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2725{
a1b1b61f 2726 struct rdma_cm_event event;
e51060f0
SH		 2727 enum cma_state state;
2728
2729 /* Record that we want to remove the device */
2730 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2731 if (state == CMA_DESTROYING)
2732 return 0;
2733
2734 cma_cancel_operation(id_priv, state);
2735 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2736
2737 /* Check for destruction from another callback. */
2738 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2739 return 0;
2740
a1b1b61f
SH		 2741 memset(&event, 0, sizeof event);
2742 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
2743 return id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 2744}
2745
2746static void cma_process_remove(struct cma_device *cma_dev)
2747{
e51060f0
SH		 2748 struct rdma_id_private *id_priv;
2749 int ret;
2750
e51060f0
SH		 2751 mutex_lock(&lock);
2752 while (!list_empty(&cma_dev->id_list)) {
2753 id_priv = list_entry(cma_dev->id_list.next,
2754 struct rdma_id_private, list);
2755
2756 if (cma_internal_listen(id_priv)) {
2757 cma_destroy_listen(id_priv);
2758 continue;
2759 }
2760
94de178a 2761 list_del_init(&id_priv->list);
e51060f0
SH		 2762 atomic_inc(&id_priv->refcount);
2763 mutex_unlock(&lock);
2764
2765 ret = cma_remove_id_dev(id_priv);
2766 cma_deref_id(id_priv);
2767 if (ret)
2768 rdma_destroy_id(&id_priv->id);
2769
2770 mutex_lock(&lock);
2771 }
2772 mutex_unlock(&lock);
2773
2774 cma_deref_dev(cma_dev);
2775 wait_for_completion(&cma_dev->comp);
2776}
2777
2778static void cma_remove_one(struct ib_device *device)
2779{
2780 struct cma_device *cma_dev;
2781
2782 cma_dev = ib_get_client_data(device, &cma_client);
2783 if (!cma_dev)
2784 return;
2785
2786 mutex_lock(&lock);
2787 list_del(&cma_dev->list);
2788 mutex_unlock(&lock);
2789
2790 cma_process_remove(cma_dev);
2791 kfree(cma_dev);
2792}
2793
2794static int cma_init(void)
2795{
2796 int ret;
2797
aedec080 2798 get_random_bytes(&next_port, sizeof next_port);
bf2944bd
SH		 2799 next_port = ((unsigned int) next_port %
2800 (sysctl_local_port_range[1] - sysctl_local_port_range[0])) +
aedec080 2801 sysctl_local_port_range[0];
c7f743a6 2802 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 2803 if (!cma_wq)
2804 return -ENOMEM;
2805
c1a0b23b 2806 ib_sa_register_client(&sa_client);
7a118df3 2807 rdma_addr_register_client(&addr_client);
c1a0b23b 2808
e51060f0
SH		 2809 ret = ib_register_client(&cma_client);
2810 if (ret)
2811 goto err;
2812 return 0;
2813
2814err:
7a118df3 2815 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2816 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2817 destroy_workqueue(cma_wq);
2818 return ret;
2819}
2820
2821static void cma_cleanup(void)
2822{
2823 ib_unregister_client(&cma_client);
7a118df3 2824 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2825 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2826 destroy_workqueue(cma_wq);
2827 idr_destroy(&sdp_ps);
2828 idr_destroy(&tcp_ps);
628e5f6d 2829 idr_destroy(&udp_ps);
c8f6a362 2830 idr_destroy(&ipoib_ps);
e51060f0
SH		 2831}
2832
2833module_init(cma_init);
2834module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)