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RDMA/cma: Set status correctly on route resolution error
[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;
e51060f0
SH		 66static LIST_HEAD(dev_list);
67static LIST_HEAD(listen_any_list);
68static DEFINE_MUTEX(lock);
69static struct workqueue_struct *cma_wq;
70static DEFINE_IDR(sdp_ps);
71static DEFINE_IDR(tcp_ps);
72
73struct cma_device {
74 struct list_head list;
75 struct ib_device *device;
76 __be64 node_guid;
77 struct completion comp;
78 atomic_t refcount;
79 struct list_head id_list;
80};
81
82enum cma_state {
83 CMA_IDLE,
84 CMA_ADDR_QUERY,
85 CMA_ADDR_RESOLVED,
86 CMA_ROUTE_QUERY,
87 CMA_ROUTE_RESOLVED,
88 CMA_CONNECT,
89 CMA_DISCONNECT,
90 CMA_ADDR_BOUND,
91 CMA_LISTEN,
92 CMA_DEVICE_REMOVAL,
93 CMA_DESTROYING
94};
95
96struct rdma_bind_list {
97 struct idr *ps;
98 struct hlist_head owners;
99 unsigned short port;
100};
101
102/*
103 * Device removal can occur at anytime, so we need extra handling to
104 * serialize notifying the user of device removal with other callbacks.
105 * We do this by disabling removal notification while a callback is in process,
106 * and reporting it after the callback completes.
107 */
108struct rdma_id_private {
109 struct rdma_cm_id id;
110
111 struct rdma_bind_list *bind_list;
112 struct hlist_node node;
113 struct list_head list;
114 struct list_head listen_list;
115 struct cma_device *cma_dev;
116
117 enum cma_state state;
118 spinlock_t lock;
119 struct completion comp;
120 atomic_t refcount;
121 wait_queue_head_t wait_remove;
122 atomic_t dev_remove;
123
124 int backlog;
125 int timeout_ms;
126 struct ib_sa_query *query;
127 int query_id;
128 union {
129 struct ib_cm_id *ib;
07ebafba 130 struct iw_cm_id *iw;
e51060f0
SH		 131 } cm_id;
132
133 u32 seq_num;
134 u32 qp_num;
135 enum ib_qp_type qp_type;
136 u8 srq;
137};
138
139struct cma_work {
140 struct work_struct work;
141 struct rdma_id_private *id;
142 enum cma_state old_state;
143 enum cma_state new_state;
144 struct rdma_cm_event event;
145};
146
147union cma_ip_addr {
148 struct in6_addr ip6;
149 struct {
150 __u32 pad[3];
151 __u32 addr;
152 } ip4;
153};
154
155struct cma_hdr {
156 u8 cma_version;
157 u8 ip_version; /* IP version: 7:4 */
158 __u16 port;
159 union cma_ip_addr src_addr;
160 union cma_ip_addr dst_addr;
161};
162
163struct sdp_hh {
164 u8 bsdh[16];
165 u8 sdp_version; /* Major version: 7:4 */
166 u8 ip_version; /* IP version: 7:4 */
167 u8 sdp_specific1[10];
168 __u16 port;
169 __u16 sdp_specific2;
170 union cma_ip_addr src_addr;
171 union cma_ip_addr dst_addr;
172};
173
174struct sdp_hah {
175 u8 bsdh[16];
176 u8 sdp_version;
177};
178
179#define CMA_VERSION 0x00
180#define SDP_MAJ_VERSION 0x2
181
182static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
183{
184 unsigned long flags;
185 int ret;
186
187 spin_lock_irqsave(&id_priv->lock, flags);
188 ret = (id_priv->state == comp);
189 spin_unlock_irqrestore(&id_priv->lock, flags);
190 return ret;
191}
192
193static int cma_comp_exch(struct rdma_id_private *id_priv,
194 enum cma_state comp, enum cma_state exch)
195{
196 unsigned long flags;
197 int ret;
198
199 spin_lock_irqsave(&id_priv->lock, flags);
200 if ((ret = (id_priv->state == comp)))
201 id_priv->state = exch;
202 spin_unlock_irqrestore(&id_priv->lock, flags);
203 return ret;
204}
205
206static enum cma_state cma_exch(struct rdma_id_private *id_priv,
207 enum cma_state exch)
208{
209 unsigned long flags;
210 enum cma_state old;
211
212 spin_lock_irqsave(&id_priv->lock, flags);
213 old = id_priv->state;
214 id_priv->state = exch;
215 spin_unlock_irqrestore(&id_priv->lock, flags);
216 return old;
217}
218
219static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
220{
221 return hdr->ip_version >> 4;
222}
223
224static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
225{
226 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
227}
228
229static inline u8 sdp_get_majv(u8 sdp_version)
230{
231 return sdp_version >> 4;
232}
233
234static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
235{
236 return hh->ip_version >> 4;
237}
238
239static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
240{
241 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
242}
243
244static void cma_attach_to_dev(struct rdma_id_private *id_priv,
245 struct cma_device *cma_dev)
246{
247 atomic_inc(&cma_dev->refcount);
248 id_priv->cma_dev = cma_dev;
249 id_priv->id.device = cma_dev->device;
250 list_add_tail(&id_priv->list, &cma_dev->id_list);
251}
252
253static inline void cma_deref_dev(struct cma_device *cma_dev)
254{
255 if (atomic_dec_and_test(&cma_dev->refcount))
256 complete(&cma_dev->comp);
257}
258
259static void cma_detach_from_dev(struct rdma_id_private *id_priv)
260{
261 list_del(&id_priv->list);
262 cma_deref_dev(id_priv->cma_dev);
263 id_priv->cma_dev = NULL;
264}
265
07ebafba 266static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 267{
07ebafba 268 enum rdma_node_type dev_type = id_priv->id.route.addr.dev_addr.dev_type;
e51060f0 269 struct cma_device *cma_dev;
f0ee3404 270 union ib_gid gid;
e51060f0
SH		 271 int ret = -ENODEV;
272
07ebafba
TT		 273 switch (rdma_node_get_transport(dev_type)) {
274 case RDMA_TRANSPORT_IB:
275 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
276 break;
277 case RDMA_TRANSPORT_IWARP:
278 iw_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
279 break;
280 default:
281 return -ENODEV;
282 }
61a73c70 283
e51060f0 284 list_for_each_entry(cma_dev, &dev_list, list) {
f0ee3404 285 ret = ib_find_cached_gid(cma_dev->device, &gid,
e51060f0
SH		 286 &id_priv->id.port_num, NULL);
287 if (!ret) {
288 cma_attach_to_dev(id_priv, cma_dev);
289 break;
290 }
291 }
e51060f0
SH		 292 return ret;
293}
294
e51060f0
SH		 295static void cma_deref_id(struct rdma_id_private *id_priv)
296{
297 if (atomic_dec_and_test(&id_priv->refcount))
298 complete(&id_priv->comp);
299}
300
301static void cma_release_remove(struct rdma_id_private *id_priv)
302{
303 if (atomic_dec_and_test(&id_priv->dev_remove))
304 wake_up(&id_priv->wait_remove);
305}
306
307struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
308 void *context, enum rdma_port_space ps)
309{
310 struct rdma_id_private *id_priv;
311
312 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
313 if (!id_priv)
314 return ERR_PTR(-ENOMEM);
315
316 id_priv->state = CMA_IDLE;
317 id_priv->id.context = context;
318 id_priv->id.event_handler = event_handler;
319 id_priv->id.ps = ps;
320 spin_lock_init(&id_priv->lock);
321 init_completion(&id_priv->comp);
322 atomic_set(&id_priv->refcount, 1);
323 init_waitqueue_head(&id_priv->wait_remove);
324 atomic_set(&id_priv->dev_remove, 0);
325 INIT_LIST_HEAD(&id_priv->listen_list);
326 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
327
328 return &id_priv->id;
329}
330EXPORT_SYMBOL(rdma_create_id);
331
332static int cma_init_ib_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
333{
334 struct ib_qp_attr qp_attr;
335 struct rdma_dev_addr *dev_addr;
336 int ret;
337
338 dev_addr = &id_priv->id.route.addr.dev_addr;
339 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
340 ib_addr_get_pkey(dev_addr),
341 &qp_attr.pkey_index);
342 if (ret)
343 return ret;
344
345 qp_attr.qp_state = IB_QPS_INIT;
346 qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE;
347 qp_attr.port_num = id_priv->id.port_num;
348 return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS |
349 IB_QP_PKEY_INDEX | IB_QP_PORT);
350}
351
07ebafba
TT		 352static int cma_init_iw_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
353{
354 struct ib_qp_attr qp_attr;
355
356 qp_attr.qp_state = IB_QPS_INIT;
357 qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE;
358
359 return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS);
360}
361
e51060f0
SH		 362int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
363 struct ib_qp_init_attr *qp_init_attr)
364{
365 struct rdma_id_private *id_priv;
366 struct ib_qp *qp;
367 int ret;
368
369 id_priv = container_of(id, struct rdma_id_private, id);
370 if (id->device != pd->device)
371 return -EINVAL;
372
373 qp = ib_create_qp(pd, qp_init_attr);
374 if (IS_ERR(qp))
375 return PTR_ERR(qp);
376
07ebafba
TT		 377 switch (rdma_node_get_transport(id->device->node_type)) {
378 case RDMA_TRANSPORT_IB:
e51060f0
SH		 379 ret = cma_init_ib_qp(id_priv, qp);
380 break;
07ebafba
TT		 381 case RDMA_TRANSPORT_IWARP:
382 ret = cma_init_iw_qp(id_priv, qp);
383 break;
e51060f0
SH		 384 default:
385 ret = -ENOSYS;
386 break;
387 }
388
389 if (ret)
390 goto err;
391
392 id->qp = qp;
393 id_priv->qp_num = qp->qp_num;
394 id_priv->qp_type = qp->qp_type;
395 id_priv->srq = (qp->srq != NULL);
396 return 0;
397err:
398 ib_destroy_qp(qp);
399 return ret;
400}
401EXPORT_SYMBOL(rdma_create_qp);
402
403void rdma_destroy_qp(struct rdma_cm_id *id)
404{
405 ib_destroy_qp(id->qp);
406}
407EXPORT_SYMBOL(rdma_destroy_qp);
408
409static int cma_modify_qp_rtr(struct rdma_cm_id *id)
410{
411 struct ib_qp_attr qp_attr;
412 int qp_attr_mask, ret;
413
414 if (!id->qp)
415 return 0;
416
417 /* Need to update QP attributes from default values. */
418 qp_attr.qp_state = IB_QPS_INIT;
419 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
420 if (ret)
421 return ret;
422
423 ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
424 if (ret)
425 return ret;
426
427 qp_attr.qp_state = IB_QPS_RTR;
428 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
429 if (ret)
430 return ret;
431
432 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
433}
434
435static int cma_modify_qp_rts(struct rdma_cm_id *id)
436{
437 struct ib_qp_attr qp_attr;
438 int qp_attr_mask, ret;
439
440 if (!id->qp)
441 return 0;
442
443 qp_attr.qp_state = IB_QPS_RTS;
444 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
445 if (ret)
446 return ret;
447
448 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
449}
450
451static int cma_modify_qp_err(struct rdma_cm_id *id)
452{
453 struct ib_qp_attr qp_attr;
454
455 if (!id->qp)
456 return 0;
457
458 qp_attr.qp_state = IB_QPS_ERR;
459 return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE);
460}
461
462int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
463 int *qp_attr_mask)
464{
465 struct rdma_id_private *id_priv;
466 int ret;
467
468 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 469 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
470 case RDMA_TRANSPORT_IB:
e51060f0
SH		 471 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
472 qp_attr_mask);
473 if (qp_attr->qp_state == IB_QPS_RTR)
474 qp_attr->rq_psn = id_priv->seq_num;
475 break;
07ebafba
TT		 476 case RDMA_TRANSPORT_IWARP:
477 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
478 qp_attr_mask);
479 break;
e51060f0
SH		 480 default:
481 ret = -ENOSYS;
482 break;
483 }
484
485 return ret;
486}
487EXPORT_SYMBOL(rdma_init_qp_attr);
488
489static inline int cma_zero_addr(struct sockaddr *addr)
490{
491 struct in6_addr *ip6;
492
493 if (addr->sa_family == AF_INET)
494 return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr);
495 else {
496 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
497 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 498 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 499 }
500}
501
502static inline int cma_loopback_addr(struct sockaddr *addr)
503{
504 return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr);
505}
506
507static inline int cma_any_addr(struct sockaddr *addr)
508{
509 return cma_zero_addr(addr) || cma_loopback_addr(addr);
510}
511
512static inline int cma_any_port(struct sockaddr *addr)
513{
514 return !((struct sockaddr_in *) addr)->sin_port;
515}
516
517static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
518 u8 *ip_ver, __u16 *port,
519 union cma_ip_addr **src, union cma_ip_addr **dst)
520{
521 switch (ps) {
522 case RDMA_PS_SDP:
523 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
524 SDP_MAJ_VERSION)
525 return -EINVAL;
526
527 *ip_ver = sdp_get_ip_ver(hdr);
528 *port = ((struct sdp_hh *) hdr)->port;
529 *src = &((struct sdp_hh *) hdr)->src_addr;
530 *dst = &((struct sdp_hh *) hdr)->dst_addr;
531 break;
532 default:
533 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
534 return -EINVAL;
535
536 *ip_ver = cma_get_ip_ver(hdr);
537 *port = ((struct cma_hdr *) hdr)->port;
538 *src = &((struct cma_hdr *) hdr)->src_addr;
539 *dst = &((struct cma_hdr *) hdr)->dst_addr;
540 break;
541 }
542
543 if (*ip_ver != 4 && *ip_ver != 6)
544 return -EINVAL;
545 return 0;
546}
547
548static void cma_save_net_info(struct rdma_addr *addr,
549 struct rdma_addr *listen_addr,
550 u8 ip_ver, __u16 port,
551 union cma_ip_addr *src, union cma_ip_addr *dst)
552{
553 struct sockaddr_in *listen4, *ip4;
554 struct sockaddr_in6 *listen6, *ip6;
555
556 switch (ip_ver) {
557 case 4:
558 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
559 ip4 = (struct sockaddr_in *) &addr->src_addr;
560 ip4->sin_family = listen4->sin_family;
561 ip4->sin_addr.s_addr = dst->ip4.addr;
562 ip4->sin_port = listen4->sin_port;
563
564 ip4 = (struct sockaddr_in *) &addr->dst_addr;
565 ip4->sin_family = listen4->sin_family;
566 ip4->sin_addr.s_addr = src->ip4.addr;
567 ip4->sin_port = port;
568 break;
569 case 6:
570 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
571 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
572 ip6->sin6_family = listen6->sin6_family;
573 ip6->sin6_addr = dst->ip6;
574 ip6->sin6_port = listen6->sin6_port;
575
576 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
577 ip6->sin6_family = listen6->sin6_family;
578 ip6->sin6_addr = src->ip6;
579 ip6->sin6_port = port;
580 break;
581 default:
582 break;
583 }
584}
585
586static inline int cma_user_data_offset(enum rdma_port_space ps)
587{
588 switch (ps) {
589 case RDMA_PS_SDP:
590 return 0;
591 default:
592 return sizeof(struct cma_hdr);
593 }
594}
595
596static int cma_notify_user(struct rdma_id_private *id_priv,
597 enum rdma_cm_event_type type, int status,
598 void *data, u8 data_len)
599{
600 struct rdma_cm_event event;
601
602 event.event = type;
603 event.status = status;
604 event.private_data = data;
605 event.private_data_len = data_len;
606
607 return id_priv->id.event_handler(&id_priv->id, &event);
608}
609
610static void cma_cancel_route(struct rdma_id_private *id_priv)
611{
07ebafba
TT		 612 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
613 case RDMA_TRANSPORT_IB:
e51060f0
SH		 614 if (id_priv->query)
615 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
616 break;
617 default:
618 break;
619 }
620}
621
622static inline int cma_internal_listen(struct rdma_id_private *id_priv)
623{
624 return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev &&
625 cma_any_addr(&id_priv->id.route.addr.src_addr);
626}
627
628static void cma_destroy_listen(struct rdma_id_private *id_priv)
629{
630 cma_exch(id_priv, CMA_DESTROYING);
631
632 if (id_priv->cma_dev) {
07ebafba
TT		 633 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
634 case RDMA_TRANSPORT_IB:
3cd96564 635 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 636 ib_destroy_cm_id(id_priv->cm_id.ib);
637 break;
07ebafba
TT		 638 case RDMA_TRANSPORT_IWARP:
639 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
640 iw_destroy_cm_id(id_priv->cm_id.iw);
641 break;
e51060f0
SH		 642 default:
643 break;
644 }
645 cma_detach_from_dev(id_priv);
646 }
647 list_del(&id_priv->listen_list);
648
649 cma_deref_id(id_priv);
650 wait_for_completion(&id_priv->comp);
651
652 kfree(id_priv);
653}
654
655static void cma_cancel_listens(struct rdma_id_private *id_priv)
656{
657 struct rdma_id_private *dev_id_priv;
658
659 mutex_lock(&lock);
660 list_del(&id_priv->list);
661
662 while (!list_empty(&id_priv->listen_list)) {
663 dev_id_priv = list_entry(id_priv->listen_list.next,
664 struct rdma_id_private, listen_list);
665 cma_destroy_listen(dev_id_priv);
666 }
667 mutex_unlock(&lock);
668}
669
670static void cma_cancel_operation(struct rdma_id_private *id_priv,
671 enum cma_state state)
672{
673 switch (state) {
674 case CMA_ADDR_QUERY:
675 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
676 break;
677 case CMA_ROUTE_QUERY:
678 cma_cancel_route(id_priv);
679 break;
680 case CMA_LISTEN:
681 if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&
682 !id_priv->cma_dev)
683 cma_cancel_listens(id_priv);
684 break;
685 default:
686 break;
687 }
688}
689
690static void cma_release_port(struct rdma_id_private *id_priv)
691{
692 struct rdma_bind_list *bind_list = id_priv->bind_list;
693
694 if (!bind_list)
695 return;
696
697 mutex_lock(&lock);
698 hlist_del(&id_priv->node);
699 if (hlist_empty(&bind_list->owners)) {
700 idr_remove(bind_list->ps, bind_list->port);
701 kfree(bind_list);
702 }
703 mutex_unlock(&lock);
704}
705
706void rdma_destroy_id(struct rdma_cm_id *id)
707{
708 struct rdma_id_private *id_priv;
709 enum cma_state state;
710
711 id_priv = container_of(id, struct rdma_id_private, id);
712 state = cma_exch(id_priv, CMA_DESTROYING);
713 cma_cancel_operation(id_priv, state);
714
61a73c70 715 mutex_lock(&lock);
e51060f0 716 if (id_priv->cma_dev) {
61a73c70 717 mutex_unlock(&lock);
07ebafba
TT		 718 switch (rdma_node_get_transport(id->device->node_type)) {
719 case RDMA_TRANSPORT_IB:
3cd96564 720 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 721 ib_destroy_cm_id(id_priv->cm_id.ib);
722 break;
07ebafba
TT		 723 case RDMA_TRANSPORT_IWARP:
724 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
725 iw_destroy_cm_id(id_priv->cm_id.iw);
726 break;
e51060f0
SH		 727 default:
728 break;
729 }
3cd96564 730 mutex_lock(&lock);
e51060f0 731 cma_detach_from_dev(id_priv);
e51060f0 732 }
61a73c70 733 mutex_unlock(&lock);
e51060f0
SH		 734
735 cma_release_port(id_priv);
736 cma_deref_id(id_priv);
737 wait_for_completion(&id_priv->comp);
738
739 kfree(id_priv->id.route.path_rec);
740 kfree(id_priv);
741}
742EXPORT_SYMBOL(rdma_destroy_id);
743
744static int cma_rep_recv(struct rdma_id_private *id_priv)
745{
746 int ret;
747
748 ret = cma_modify_qp_rtr(&id_priv->id);
749 if (ret)
750 goto reject;
751
752 ret = cma_modify_qp_rts(&id_priv->id);
753 if (ret)
754 goto reject;
755
756 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
757 if (ret)
758 goto reject;
759
760 return 0;
761reject:
762 cma_modify_qp_err(&id_priv->id);
763 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
764 NULL, 0, NULL, 0);
765 return ret;
766}
767
768static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
769{
770 if (id_priv->id.ps == RDMA_PS_SDP &&
771 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
772 SDP_MAJ_VERSION)
773 return -EINVAL;
774
775 return 0;
776}
777
778static int cma_rtu_recv(struct rdma_id_private *id_priv)
779{
780 int ret;
781
782 ret = cma_modify_qp_rts(&id_priv->id);
783 if (ret)
784 goto reject;
785
786 return 0;
787reject:
788 cma_modify_qp_err(&id_priv->id);
789 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
790 NULL, 0, NULL, 0);
791 return ret;
792}
793
794static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
795{
796 struct rdma_id_private *id_priv = cm_id->context;
797 enum rdma_cm_event_type event;
798 u8 private_data_len = 0;
799 int ret = 0, status = 0;
800
801 atomic_inc(&id_priv->dev_remove);
802 if (!cma_comp(id_priv, CMA_CONNECT))
803 goto out;
804
805 switch (ib_event->event) {
806 case IB_CM_REQ_ERROR:
807 case IB_CM_REP_ERROR:
808 event = RDMA_CM_EVENT_UNREACHABLE;
809 status = -ETIMEDOUT;
810 break;
811 case IB_CM_REP_RECEIVED:
812 status = cma_verify_rep(id_priv, ib_event->private_data);
813 if (status)
814 event = RDMA_CM_EVENT_CONNECT_ERROR;
815 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
816 status = cma_rep_recv(id_priv);
817 event = status ? RDMA_CM_EVENT_CONNECT_ERROR :
818 RDMA_CM_EVENT_ESTABLISHED;
819 } else
820 event = RDMA_CM_EVENT_CONNECT_RESPONSE;
821 private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
822 break;
823 case IB_CM_RTU_RECEIVED:
824 status = cma_rtu_recv(id_priv);
825 event = status ? RDMA_CM_EVENT_CONNECT_ERROR :
826 RDMA_CM_EVENT_ESTABLISHED;
827 break;
828 case IB_CM_DREQ_ERROR:
829 status = -ETIMEDOUT; /* fall through */
830 case IB_CM_DREQ_RECEIVED:
831 case IB_CM_DREP_RECEIVED:
832 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
833 goto out;
834 event = RDMA_CM_EVENT_DISCONNECTED;
835 break;
836 case IB_CM_TIMEWAIT_EXIT:
837 case IB_CM_MRA_RECEIVED:
838 /* ignore event */
839 goto out;
840 case IB_CM_REJ_RECEIVED:
841 cma_modify_qp_err(&id_priv->id);
842 status = ib_event->param.rej_rcvd.reason;
843 event = RDMA_CM_EVENT_REJECTED;
74f76fba 844 private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 845 break;
846 default:
847 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
848 ib_event->event);
849 goto out;
850 }
851
852 ret = cma_notify_user(id_priv, event, status, ib_event->private_data,
853 private_data_len);
854 if (ret) {
855 /* Destroy the CM ID by returning a non-zero value. */
856 id_priv->cm_id.ib = NULL;
857 cma_exch(id_priv, CMA_DESTROYING);
858 cma_release_remove(id_priv);
859 rdma_destroy_id(&id_priv->id);
860 return ret;
861 }
862out:
863 cma_release_remove(id_priv);
864 return ret;
865}
866
867static struct rdma_id_private *cma_new_id(struct rdma_cm_id *listen_id,
868 struct ib_cm_event *ib_event)
869{
870 struct rdma_id_private *id_priv;
871 struct rdma_cm_id *id;
872 struct rdma_route *rt;
873 union cma_ip_addr *src, *dst;
874 __u16 port;
875 u8 ip_ver;
876
877 id = rdma_create_id(listen_id->event_handler, listen_id->context,
878 listen_id->ps);
879 if (IS_ERR(id))
880 return NULL;
881
882 rt = &id->route;
883 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
884 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, GFP_KERNEL);
885 if (!rt->path_rec)
886 goto err;
887
888 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
889 &ip_ver, &port, &src, &dst))
890 goto err;
891
892 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
893 ip_ver, port, src, dst);
894 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
895 if (rt->num_paths == 2)
896 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
897
898 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
899 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
900 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
07ebafba 901 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
e51060f0
SH		 902
903 id_priv = container_of(id, struct rdma_id_private, id);
904 id_priv->state = CMA_CONNECT;
905 return id_priv;
906err:
907 rdma_destroy_id(id);
908 return NULL;
909}
910
911static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
912{
913 struct rdma_id_private *listen_id, *conn_id;
914 int offset, ret;
915
916 listen_id = cm_id->context;
917 atomic_inc(&listen_id->dev_remove);
918 if (!cma_comp(listen_id, CMA_LISTEN)) {
919 ret = -ECONNABORTED;
920 goto out;
921 }
922
923 conn_id = cma_new_id(&listen_id->id, ib_event);
924 if (!conn_id) {
925 ret = -ENOMEM;
926 goto out;
927 }
928
929 atomic_inc(&conn_id->dev_remove);
61a73c70 930 mutex_lock(&lock);
07ebafba 931 ret = cma_acquire_dev(conn_id);
61a73c70 932 mutex_unlock(&lock);
e51060f0
SH		 933 if (ret) {
934 ret = -ENODEV;
6e35aabe 935 cma_exch(conn_id, CMA_DESTROYING);
e51060f0
SH		 936 cma_release_remove(conn_id);
937 rdma_destroy_id(&conn_id->id);
938 goto out;
939 }
940
941 conn_id->cm_id.ib = cm_id;
942 cm_id->context = conn_id;
943 cm_id->cm_handler = cma_ib_handler;
944
945 offset = cma_user_data_offset(listen_id->id.ps);
946 ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0,
947 ib_event->private_data + offset,
948 IB_CM_REQ_PRIVATE_DATA_SIZE - offset);
949 if (ret) {
950 /* Destroy the CM ID by returning a non-zero value. */
951 conn_id->cm_id.ib = NULL;
952 cma_exch(conn_id, CMA_DESTROYING);
953 cma_release_remove(conn_id);
954 rdma_destroy_id(&conn_id->id);
955 }
956out:
957 cma_release_remove(listen_id);
958 return ret;
959}
960
961static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
962{
963 return cpu_to_be64(((u64)ps << 16) +
964 be16_to_cpu(((struct sockaddr_in *) addr)->sin_port));
965}
966
967static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
968 struct ib_cm_compare_data *compare)
969{
970 struct cma_hdr *cma_data, *cma_mask;
971 struct sdp_hh *sdp_data, *sdp_mask;
972 __u32 ip4_addr;
973 struct in6_addr ip6_addr;
974
975 memset(compare, 0, sizeof *compare);
976 cma_data = (void *) compare->data;
977 cma_mask = (void *) compare->mask;
978 sdp_data = (void *) compare->data;
979 sdp_mask = (void *) compare->mask;
980
981 switch (addr->sa_family) {
982 case AF_INET:
983 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
984 if (ps == RDMA_PS_SDP) {
985 sdp_set_ip_ver(sdp_data, 4);
986 sdp_set_ip_ver(sdp_mask, 0xF);
987 sdp_data->dst_addr.ip4.addr = ip4_addr;
988 sdp_mask->dst_addr.ip4.addr = ~0;
989 } else {
990 cma_set_ip_ver(cma_data, 4);
991 cma_set_ip_ver(cma_mask, 0xF);
992 cma_data->dst_addr.ip4.addr = ip4_addr;
993 cma_mask->dst_addr.ip4.addr = ~0;
994 }
995 break;
996 case AF_INET6:
997 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
998 if (ps == RDMA_PS_SDP) {
999 sdp_set_ip_ver(sdp_data, 6);
1000 sdp_set_ip_ver(sdp_mask, 0xF);
1001 sdp_data->dst_addr.ip6 = ip6_addr;
1002 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1003 sizeof sdp_mask->dst_addr.ip6);
1004 } else {
1005 cma_set_ip_ver(cma_data, 6);
1006 cma_set_ip_ver(cma_mask, 0xF);
1007 cma_data->dst_addr.ip6 = ip6_addr;
1008 memset(&cma_mask->dst_addr.ip6, 0xFF,
1009 sizeof cma_mask->dst_addr.ip6);
1010 }
1011 break;
1012 default:
1013 break;
1014 }
1015}
1016
07ebafba
TT		 1017static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1018{
1019 struct rdma_id_private *id_priv = iw_id->context;
1020 enum rdma_cm_event_type event = 0;
1021 struct sockaddr_in *sin;
1022 int ret = 0;
1023
1024 atomic_inc(&id_priv->dev_remove);
1025
1026 switch (iw_event->event) {
1027 case IW_CM_EVENT_CLOSE:
1028 event = RDMA_CM_EVENT_DISCONNECTED;
1029 break;
1030 case IW_CM_EVENT_CONNECT_REPLY:
1031 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1032 *sin = iw_event->local_addr;
1033 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1034 *sin = iw_event->remote_addr;
1035 if (iw_event->status)
1036 event = RDMA_CM_EVENT_REJECTED;
1037 else
1038 event = RDMA_CM_EVENT_ESTABLISHED;
1039 break;
1040 case IW_CM_EVENT_ESTABLISHED:
1041 event = RDMA_CM_EVENT_ESTABLISHED;
1042 break;
1043 default:
1044 BUG_ON(1);
1045 }
1046
1047 ret = cma_notify_user(id_priv, event, iw_event->status,
1048 iw_event->private_data,
1049 iw_event->private_data_len);
1050 if (ret) {
1051 /* Destroy the CM ID by returning a non-zero value. */
1052 id_priv->cm_id.iw = NULL;
1053 cma_exch(id_priv, CMA_DESTROYING);
1054 cma_release_remove(id_priv);
1055 rdma_destroy_id(&id_priv->id);
1056 return ret;
1057 }
1058
1059 cma_release_remove(id_priv);
1060 return ret;
1061}
1062
1063static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1064 struct iw_cm_event *iw_event)
1065{
1066 struct rdma_cm_id *new_cm_id;
1067 struct rdma_id_private *listen_id, *conn_id;
1068 struct sockaddr_in *sin;
1069 struct net_device *dev = NULL;
1070 int ret;
1071
1072 listen_id = cm_id->context;
1073 atomic_inc(&listen_id->dev_remove);
1074 if (!cma_comp(listen_id, CMA_LISTEN)) {
1075 ret = -ECONNABORTED;
1076 goto out;
1077 }
1078
1079 /* Create a new RDMA id for the new IW CM ID */
1080 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1081 listen_id->id.context,
1082 RDMA_PS_TCP);
1083 if (!new_cm_id) {
1084 ret = -ENOMEM;
1085 goto out;
1086 }
1087 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1088 atomic_inc(&conn_id->dev_remove);
1089 conn_id->state = CMA_CONNECT;
1090
1091 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
1092 if (!dev) {
1093 ret = -EADDRNOTAVAIL;
1094 cma_release_remove(conn_id);
1095 rdma_destroy_id(new_cm_id);
1096 goto out;
1097 }
1098 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1099 if (ret) {
1100 cma_release_remove(conn_id);
1101 rdma_destroy_id(new_cm_id);
1102 goto out;
1103 }
1104
61a73c70 1105 mutex_lock(&lock);
07ebafba 1106 ret = cma_acquire_dev(conn_id);
61a73c70 1107 mutex_unlock(&lock);
07ebafba
TT		 1108 if (ret) {
1109 cma_release_remove(conn_id);
1110 rdma_destroy_id(new_cm_id);
1111 goto out;
1112 }
1113
1114 conn_id->cm_id.iw = cm_id;
1115 cm_id->context = conn_id;
1116 cm_id->cm_handler = cma_iw_handler;
1117
1118 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1119 *sin = iw_event->local_addr;
1120 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1121 *sin = iw_event->remote_addr;
1122
1123 ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0,
1124 iw_event->private_data,
1125 iw_event->private_data_len);
1126 if (ret) {
1127 /* User wants to destroy the CM ID */
1128 conn_id->cm_id.iw = NULL;
1129 cma_exch(conn_id, CMA_DESTROYING);
1130 cma_release_remove(conn_id);
1131 rdma_destroy_id(&conn_id->id);
1132 }
1133
1134out:
1135 if (dev)
1136 dev_put(dev);
1137 cma_release_remove(listen_id);
1138 return ret;
1139}
1140
e51060f0
SH		 1141static int cma_ib_listen(struct rdma_id_private *id_priv)
1142{
1143 struct ib_cm_compare_data compare_data;
1144 struct sockaddr *addr;
1145 __be64 svc_id;
1146 int ret;
1147
1148 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1149 id_priv);
1150 if (IS_ERR(id_priv->cm_id.ib))
1151 return PTR_ERR(id_priv->cm_id.ib);
1152
1153 addr = &id_priv->id.route.addr.src_addr;
1154 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1155 if (cma_any_addr(addr))
1156 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1157 else {
1158 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1159 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1160 }
1161
1162 if (ret) {
1163 ib_destroy_cm_id(id_priv->cm_id.ib);
1164 id_priv->cm_id.ib = NULL;
1165 }
1166
1167 return ret;
1168}
1169
07ebafba
TT		 1170static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1171{
1172 int ret;
1173 struct sockaddr_in *sin;
1174
1175 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1176 iw_conn_req_handler,
1177 id_priv);
1178 if (IS_ERR(id_priv->cm_id.iw))
1179 return PTR_ERR(id_priv->cm_id.iw);
1180
1181 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1182 id_priv->cm_id.iw->local_addr = *sin;
1183
1184 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1185
1186 if (ret) {
1187 iw_destroy_cm_id(id_priv->cm_id.iw);
1188 id_priv->cm_id.iw = NULL;
1189 }
1190
1191 return ret;
1192}
1193
e51060f0
SH		 1194static int cma_listen_handler(struct rdma_cm_id *id,
1195 struct rdma_cm_event *event)
1196{
1197 struct rdma_id_private *id_priv = id->context;
1198
1199 id->context = id_priv->id.context;
1200 id->event_handler = id_priv->id.event_handler;
1201 return id_priv->id.event_handler(id, event);
1202}
1203
1204static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1205 struct cma_device *cma_dev)
1206{
1207 struct rdma_id_private *dev_id_priv;
1208 struct rdma_cm_id *id;
1209 int ret;
1210
1211 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1212 if (IS_ERR(id))
1213 return;
1214
1215 dev_id_priv = container_of(id, struct rdma_id_private, id);
1216
1217 dev_id_priv->state = CMA_ADDR_BOUND;
1218 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1219 ip_addr_size(&id_priv->id.route.addr.src_addr));
1220
1221 cma_attach_to_dev(dev_id_priv, cma_dev);
1222 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1223
1224 ret = rdma_listen(id, id_priv->backlog);
1225 if (ret)
1226 goto err;
1227
1228 return;
1229err:
1230 cma_destroy_listen(dev_id_priv);
1231}
1232
1233static void cma_listen_on_all(struct rdma_id_private *id_priv)
1234{
1235 struct cma_device *cma_dev;
1236
1237 mutex_lock(&lock);
1238 list_add_tail(&id_priv->list, &listen_any_list);
1239 list_for_each_entry(cma_dev, &dev_list, list)
1240 cma_listen_on_dev(id_priv, cma_dev);
1241 mutex_unlock(&lock);
1242}
1243
1244static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1245{
1246 struct sockaddr_in addr_in;
1247
1248 memset(&addr_in, 0, sizeof addr_in);
1249 addr_in.sin_family = af;
1250 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1251}
1252
1253int rdma_listen(struct rdma_cm_id *id, int backlog)
1254{
1255 struct rdma_id_private *id_priv;
1256 int ret;
1257
1258 id_priv = container_of(id, struct rdma_id_private, id);
1259 if (id_priv->state == CMA_IDLE) {
1260 ret = cma_bind_any(id, AF_INET);
1261 if (ret)
1262 return ret;
1263 }
1264
1265 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1266 return -EINVAL;
1267
1268 id_priv->backlog = backlog;
1269 if (id->device) {
07ebafba
TT		 1270 switch (rdma_node_get_transport(id->device->node_type)) {
1271 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1272 ret = cma_ib_listen(id_priv);
1273 if (ret)
1274 goto err;
1275 break;
07ebafba
TT		 1276 case RDMA_TRANSPORT_IWARP:
1277 ret = cma_iw_listen(id_priv, backlog);
1278 if (ret)
1279 goto err;
1280 break;
e51060f0
SH		 1281 default:
1282 ret = -ENOSYS;
1283 goto err;
1284 }
1285 } else
1286 cma_listen_on_all(id_priv);
1287
1288 return 0;
1289err:
1290 id_priv->backlog = 0;
1291 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1292 return ret;
1293}
1294EXPORT_SYMBOL(rdma_listen);
1295
1296static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1297 void *context)
1298{
1299 struct cma_work *work = context;
1300 struct rdma_route *route;
1301
1302 route = &work->id->id.route;
1303
1304 if (!status) {
1305 route->num_paths = 1;
1306 *route->path_rec = *path_rec;
1307 } else {
1308 work->old_state = CMA_ROUTE_QUERY;
1309 work->new_state = CMA_ADDR_RESOLVED;
1310 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1311 work->event.status = status;
e51060f0
SH		 1312 }
1313
1314 queue_work(cma_wq, &work->work);
1315}
1316
1317static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1318 struct cma_work *work)
1319{
1320 struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr;
1321 struct ib_sa_path_rec path_rec;
1322
1323 memset(&path_rec, 0, sizeof path_rec);
f0ee3404
MT		 1324 ib_addr_get_sgid(addr, &path_rec.sgid);
1325 ib_addr_get_dgid(addr, &path_rec.dgid);
e51060f0
SH		 1326 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr));
1327 path_rec.numb_path = 1;
1328
c1a0b23b 1329 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
e51060f0
SH		 1330 id_priv->id.port_num, &path_rec,
1331 IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1332 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH,
1333 timeout_ms, GFP_KERNEL,
1334 cma_query_handler, work, &id_priv->query);
1335
1336 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1337}
1338
1339static void cma_work_handler(void *data)
1340{
1341 struct cma_work *work = data;
1342 struct rdma_id_private *id_priv = work->id;
1343 int destroy = 0;
1344
1345 atomic_inc(&id_priv->dev_remove);
1346 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1347 goto out;
1348
1349 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1350 cma_exch(id_priv, CMA_DESTROYING);
1351 destroy = 1;
1352 }
1353out:
1354 cma_release_remove(id_priv);
1355 cma_deref_id(id_priv);
1356 if (destroy)
1357 rdma_destroy_id(&id_priv->id);
1358 kfree(work);
1359}
1360
1361static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1362{
1363 struct rdma_route *route = &id_priv->id.route;
1364 struct cma_work *work;
1365 int ret;
1366
1367 work = kzalloc(sizeof *work, GFP_KERNEL);
1368 if (!work)
1369 return -ENOMEM;
1370
1371 work->id = id_priv;
1372 INIT_WORK(&work->work, cma_work_handler, work);
1373 work->old_state = CMA_ROUTE_QUERY;
1374 work->new_state = CMA_ROUTE_RESOLVED;
1375 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1376
1377 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1378 if (!route->path_rec) {
1379 ret = -ENOMEM;
1380 goto err1;
1381 }
1382
1383 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1384 if (ret)
1385 goto err2;
1386
1387 return 0;
1388err2:
1389 kfree(route->path_rec);
1390 route->path_rec = NULL;
1391err1:
1392 kfree(work);
1393 return ret;
1394}
1395
1396int rdma_set_ib_paths(struct rdma_cm_id *id,
1397 struct ib_sa_path_rec *path_rec, int num_paths)
1398{
1399 struct rdma_id_private *id_priv;
1400 int ret;
1401
1402 id_priv = container_of(id, struct rdma_id_private, id);
1403 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1404 return -EINVAL;
1405
1406 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1407 if (!id->route.path_rec) {
1408 ret = -ENOMEM;
1409 goto err;
1410 }
1411
1412 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1413 return 0;
1414err:
1415 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1416 return ret;
1417}
1418EXPORT_SYMBOL(rdma_set_ib_paths);
1419
07ebafba
TT		 1420static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1421{
1422 struct cma_work *work;
1423
1424 work = kzalloc(sizeof *work, GFP_KERNEL);
1425 if (!work)
1426 return -ENOMEM;
1427
1428 work->id = id_priv;
1429 INIT_WORK(&work->work, cma_work_handler, work);
1430 work->old_state = CMA_ROUTE_QUERY;
1431 work->new_state = CMA_ROUTE_RESOLVED;
1432 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1433 queue_work(cma_wq, &work->work);
1434 return 0;
1435}
1436
e51060f0
SH		 1437int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1438{
1439 struct rdma_id_private *id_priv;
1440 int ret;
1441
1442 id_priv = container_of(id, struct rdma_id_private, id);
1443 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1444 return -EINVAL;
1445
1446 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1447 switch (rdma_node_get_transport(id->device->node_type)) {
1448 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1449 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1450 break;
07ebafba
TT		 1451 case RDMA_TRANSPORT_IWARP:
1452 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1453 break;
e51060f0
SH		 1454 default:
1455 ret = -ENOSYS;
1456 break;
1457 }
1458 if (ret)
1459 goto err;
1460
1461 return 0;
1462err:
1463 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1464 cma_deref_id(id_priv);
1465 return ret;
1466}
1467EXPORT_SYMBOL(rdma_resolve_route);
1468
1469static int cma_bind_loopback(struct rdma_id_private *id_priv)
1470{
1471 struct cma_device *cma_dev;
1472 struct ib_port_attr port_attr;
f0ee3404 1473 union ib_gid gid;
e51060f0
SH		 1474 u16 pkey;
1475 int ret;
1476 u8 p;
1477
1478 mutex_lock(&lock);
1479 list_for_each_entry(cma_dev, &dev_list, list)
1480 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1481 if (!ib_query_port (cma_dev->device, p, &port_attr) &&
1482 port_attr.state == IB_PORT_ACTIVE)
1483 goto port_found;
1484
1485 if (!list_empty(&dev_list)) {
1486 p = 1;
1487 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1488 } else {
1489 ret = -ENODEV;
1490 goto out;
1491 }
1492
1493port_found:
f0ee3404 1494 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1495 if (ret)
1496 goto out;
1497
1498 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1499 if (ret)
1500 goto out;
1501
f0ee3404 1502 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1503 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1504 id_priv->id.port_num = p;
1505 cma_attach_to_dev(id_priv, cma_dev);
1506out:
1507 mutex_unlock(&lock);
1508 return ret;
1509}
1510
1511static void addr_handler(int status, struct sockaddr *src_addr,
1512 struct rdma_dev_addr *dev_addr, void *context)
1513{
1514 struct rdma_id_private *id_priv = context;
1515 enum rdma_cm_event_type event;
1516
1517 atomic_inc(&id_priv->dev_remove);
61a73c70
SH		 1518
1519 /*
1520 * Grab mutex to block rdma_destroy_id() from removing the device while
1521 * we're trying to acquire it.
1522 */
1523 mutex_lock(&lock);
1524 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1525 mutex_unlock(&lock);
1526 goto out;
1527 }
1528
1529 if (!status && !id_priv->cma_dev)
e51060f0 1530 status = cma_acquire_dev(id_priv);
61a73c70 1531 mutex_unlock(&lock);
e51060f0
SH		 1532
1533 if (status) {
61a73c70 1534 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0
SH		 1535 goto out;
1536 event = RDMA_CM_EVENT_ADDR_ERROR;
1537 } else {
e51060f0
SH		 1538 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1539 ip_addr_size(src_addr));
1540 event = RDMA_CM_EVENT_ADDR_RESOLVED;
1541 }
1542
1543 if (cma_notify_user(id_priv, event, status, NULL, 0)) {
1544 cma_exch(id_priv, CMA_DESTROYING);
1545 cma_release_remove(id_priv);
1546 cma_deref_id(id_priv);
1547 rdma_destroy_id(&id_priv->id);
1548 return;
1549 }
1550out:
1551 cma_release_remove(id_priv);
1552 cma_deref_id(id_priv);
1553}
1554
1555static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1556{
1557 struct cma_work *work;
1558 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1559 union ib_gid gid;
e51060f0
SH		 1560 int ret;
1561
1562 work = kzalloc(sizeof *work, GFP_KERNEL);
1563 if (!work)
1564 return -ENOMEM;
1565
1566 if (!id_priv->cma_dev) {
1567 ret = cma_bind_loopback(id_priv);
1568 if (ret)
1569 goto err;
1570 }
1571
f0ee3404
MT		 1572 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1573 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1574
1575 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1576 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1577 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1578 src_in->sin_family = dst_in->sin_family;
1579 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1580 }
1581
1582 work->id = id_priv;
1583 INIT_WORK(&work->work, cma_work_handler, work);
1584 work->old_state = CMA_ADDR_QUERY;
1585 work->new_state = CMA_ADDR_RESOLVED;
1586 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1587 queue_work(cma_wq, &work->work);
1588 return 0;
1589err:
1590 kfree(work);
1591 return ret;
1592}
1593
1594static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1595 struct sockaddr *dst_addr)
1596{
1597 if (src_addr && src_addr->sa_family)
1598 return rdma_bind_addr(id, src_addr);
1599 else
1600 return cma_bind_any(id, dst_addr->sa_family);
1601}
1602
1603int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1604 struct sockaddr *dst_addr, int timeout_ms)
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 (id_priv->state == CMA_IDLE) {
1611 ret = cma_bind_addr(id, src_addr, dst_addr);
1612 if (ret)
1613 return ret;
1614 }
1615
1616 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1617 return -EINVAL;
1618
1619 atomic_inc(&id_priv->refcount);
1620 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1621 if (cma_any_addr(dst_addr))
1622 ret = cma_resolve_loopback(id_priv);
1623 else
1624 ret = rdma_resolve_ip(&id->route.addr.src_addr, dst_addr,
1625 &id->route.addr.dev_addr,
1626 timeout_ms, addr_handler, id_priv);
1627 if (ret)
1628 goto err;
1629
1630 return 0;
1631err:
1632 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1633 cma_deref_id(id_priv);
1634 return ret;
1635}
1636EXPORT_SYMBOL(rdma_resolve_addr);
1637
1638static void cma_bind_port(struct rdma_bind_list *bind_list,
1639 struct rdma_id_private *id_priv)
1640{
1641 struct sockaddr_in *sin;
1642
1643 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1644 sin->sin_port = htons(bind_list->port);
1645 id_priv->bind_list = bind_list;
1646 hlist_add_head(&id_priv->node, &bind_list->owners);
1647}
1648
1649static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1650 unsigned short snum)
1651{
1652 struct rdma_bind_list *bind_list;
1653 int port, start, ret;
1654
1655 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1656 if (!bind_list)
1657 return -ENOMEM;
1658
1659 start = snum ? snum : sysctl_local_port_range[0];
1660
1661 do {
1662 ret = idr_get_new_above(ps, bind_list, start, &port);
1663 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1664
1665 if (ret)
1666 goto err;
1667
1668 if ((snum && port != snum) ||
1669 (!snum && port > sysctl_local_port_range[1])) {
1670 idr_remove(ps, port);
1671 ret = -EADDRNOTAVAIL;
1672 goto err;
1673 }
1674
1675 bind_list->ps = ps;
1676 bind_list->port = (unsigned short) port;
1677 cma_bind_port(bind_list, id_priv);
1678 return 0;
1679err:
1680 kfree(bind_list);
1681 return ret;
1682}
1683
1684static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1685{
1686 struct rdma_id_private *cur_id;
1687 struct sockaddr_in *sin, *cur_sin;
1688 struct rdma_bind_list *bind_list;
1689 struct hlist_node *node;
1690 unsigned short snum;
1691
1692 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1693 snum = ntohs(sin->sin_port);
1694 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1695 return -EACCES;
1696
1697 bind_list = idr_find(ps, snum);
1698 if (!bind_list)
1699 return cma_alloc_port(ps, id_priv, snum);
1700
1701 /*
1702 * We don't support binding to any address if anyone is bound to
1703 * a specific address on the same port.
1704 */
1705 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1706 return -EADDRNOTAVAIL;
1707
1708 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
1709 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
1710 return -EADDRNOTAVAIL;
3cd96564 1711
e51060f0
SH		 1712 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
1713 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
1714 return -EADDRINUSE;
1715 }
1716
1717 cma_bind_port(bind_list, id_priv);
1718 return 0;
1719}
1720
1721static int cma_get_port(struct rdma_id_private *id_priv)
1722{
1723 struct idr *ps;
1724 int ret;
1725
1726 switch (id_priv->id.ps) {
1727 case RDMA_PS_SDP:
1728 ps = &sdp_ps;
1729 break;
1730 case RDMA_PS_TCP:
1731 ps = &tcp_ps;
1732 break;
1733 default:
1734 return -EPROTONOSUPPORT;
1735 }
1736
1737 mutex_lock(&lock);
1738 if (cma_any_port(&id_priv->id.route.addr.src_addr))
1739 ret = cma_alloc_port(ps, id_priv, 0);
1740 else
1741 ret = cma_use_port(ps, id_priv);
1742 mutex_unlock(&lock);
1743
1744 return ret;
1745}
1746
1747int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
1748{
1749 struct rdma_id_private *id_priv;
1750 int ret;
1751
1752 if (addr->sa_family != AF_INET)
1753 return -EAFNOSUPPORT;
1754
1755 id_priv = container_of(id, struct rdma_id_private, id);
1756 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
1757 return -EINVAL;
1758
1759 if (!cma_any_addr(addr)) {
1760 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
61a73c70
SH		 1761 if (!ret) {
1762 mutex_lock(&lock);
e51060f0 1763 ret = cma_acquire_dev(id_priv);
61a73c70
SH		 1764 mutex_unlock(&lock);
1765 }
e51060f0
SH		 1766 if (ret)
1767 goto err;
1768 }
1769
1770 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
1771 ret = cma_get_port(id_priv);
1772 if (ret)
1773 goto err;
1774
1775 return 0;
1776err:
1777 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
1778 return ret;
1779}
1780EXPORT_SYMBOL(rdma_bind_addr);
1781
1782static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
1783 struct rdma_route *route)
1784{
1785 struct sockaddr_in *src4, *dst4;
1786 struct cma_hdr *cma_hdr;
1787 struct sdp_hh *sdp_hdr;
1788
1789 src4 = (struct sockaddr_in *) &route->addr.src_addr;
1790 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
1791
1792 switch (ps) {
1793 case RDMA_PS_SDP:
1794 sdp_hdr = hdr;
1795 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
1796 return -EINVAL;
1797 sdp_set_ip_ver(sdp_hdr, 4);
1798 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1799 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1800 sdp_hdr->port = src4->sin_port;
1801 break;
1802 default:
1803 cma_hdr = hdr;
1804 cma_hdr->cma_version = CMA_VERSION;
1805 cma_set_ip_ver(cma_hdr, 4);
1806 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1807 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1808 cma_hdr->port = src4->sin_port;
1809 break;
1810 }
1811 return 0;
1812}
1813
1814static int cma_connect_ib(struct rdma_id_private *id_priv,
1815 struct rdma_conn_param *conn_param)
1816{
1817 struct ib_cm_req_param req;
1818 struct rdma_route *route;
1819 void *private_data;
1820 int offset, ret;
1821
1822 memset(&req, 0, sizeof req);
1823 offset = cma_user_data_offset(id_priv->id.ps);
1824 req.private_data_len = offset + conn_param->private_data_len;
1825 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
1826 if (!private_data)
1827 return -ENOMEM;
1828
1829 if (conn_param->private_data && conn_param->private_data_len)
1830 memcpy(private_data + offset, conn_param->private_data,
1831 conn_param->private_data_len);
1832
1833 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
1834 id_priv);
1835 if (IS_ERR(id_priv->cm_id.ib)) {
1836 ret = PTR_ERR(id_priv->cm_id.ib);
1837 goto out;
1838 }
1839
1840 route = &id_priv->id.route;
1841 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
1842 if (ret)
1843 goto out;
1844 req.private_data = private_data;
1845
1846 req.primary_path = &route->path_rec[0];
1847 if (route->num_paths == 2)
1848 req.alternate_path = &route->path_rec[1];
1849
1850 req.service_id = cma_get_service_id(id_priv->id.ps,
1851 &route->addr.dst_addr);
1852 req.qp_num = id_priv->qp_num;
1853 req.qp_type = id_priv->qp_type;
1854 req.starting_psn = id_priv->seq_num;
1855 req.responder_resources = conn_param->responder_resources;
1856 req.initiator_depth = conn_param->initiator_depth;
1857 req.flow_control = conn_param->flow_control;
1858 req.retry_count = conn_param->retry_count;
1859 req.rnr_retry_count = conn_param->rnr_retry_count;
1860 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1861 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1862 req.max_cm_retries = CMA_MAX_CM_RETRIES;
1863 req.srq = id_priv->srq ? 1 : 0;
1864
1865 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
1866out:
675a027c
KK		 1867 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
1868 ib_destroy_cm_id(id_priv->cm_id.ib);
1869 id_priv->cm_id.ib = NULL;
1870 }
1871
e51060f0
SH		 1872 kfree(private_data);
1873 return ret;
1874}
1875
07ebafba
TT		 1876static int cma_connect_iw(struct rdma_id_private *id_priv,
1877 struct rdma_conn_param *conn_param)
1878{
1879 struct iw_cm_id *cm_id;
1880 struct sockaddr_in* sin;
1881 int ret;
1882 struct iw_cm_conn_param iw_param;
1883
1884 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
1885 if (IS_ERR(cm_id)) {
1886 ret = PTR_ERR(cm_id);
1887 goto out;
1888 }
1889
1890 id_priv->cm_id.iw = cm_id;
1891
1892 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
1893 cm_id->local_addr = *sin;
1894
1895 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
1896 cm_id->remote_addr = *sin;
1897
1898 ret = cma_modify_qp_rtr(&id_priv->id);
675a027c
KK		 1899 if (ret)
1900 goto out;
07ebafba
TT		 1901
1902 iw_param.ord = conn_param->initiator_depth;
1903 iw_param.ird = conn_param->responder_resources;
1904 iw_param.private_data = conn_param->private_data;
1905 iw_param.private_data_len = conn_param->private_data_len;
1906 if (id_priv->id.qp)
1907 iw_param.qpn = id_priv->qp_num;
1908 else
1909 iw_param.qpn = conn_param->qp_num;
1910 ret = iw_cm_connect(cm_id, &iw_param);
1911out:
675a027c
KK		 1912 if (ret && !IS_ERR(cm_id)) {
1913 iw_destroy_cm_id(cm_id);
1914 id_priv->cm_id.iw = NULL;
1915 }
07ebafba
TT		 1916 return ret;
1917}
1918
e51060f0
SH		 1919int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
1920{
1921 struct rdma_id_private *id_priv;
1922 int ret;
1923
1924 id_priv = container_of(id, struct rdma_id_private, id);
1925 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
1926 return -EINVAL;
1927
1928 if (!id->qp) {
1929 id_priv->qp_num = conn_param->qp_num;
1930 id_priv->qp_type = conn_param->qp_type;
1931 id_priv->srq = conn_param->srq;
1932 }
1933
07ebafba
TT		 1934 switch (rdma_node_get_transport(id->device->node_type)) {
1935 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1936 ret = cma_connect_ib(id_priv, conn_param);
1937 break;
07ebafba
TT		 1938 case RDMA_TRANSPORT_IWARP:
1939 ret = cma_connect_iw(id_priv, conn_param);
1940 break;
e51060f0
SH		 1941 default:
1942 ret = -ENOSYS;
1943 break;
1944 }
1945 if (ret)
1946 goto err;
1947
1948 return 0;
1949err:
1950 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
1951 return ret;
1952}
1953EXPORT_SYMBOL(rdma_connect);
1954
1955static int cma_accept_ib(struct rdma_id_private *id_priv,
1956 struct rdma_conn_param *conn_param)
1957{
1958 struct ib_cm_rep_param rep;
1959 int ret;
1960
1961 ret = cma_modify_qp_rtr(&id_priv->id);
1962 if (ret)
1963 return ret;
1964
1965 memset(&rep, 0, sizeof rep);
1966 rep.qp_num = id_priv->qp_num;
1967 rep.starting_psn = id_priv->seq_num;
1968 rep.private_data = conn_param->private_data;
1969 rep.private_data_len = conn_param->private_data_len;
1970 rep.responder_resources = conn_param->responder_resources;
1971 rep.initiator_depth = conn_param->initiator_depth;
1972 rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT;
1973 rep.failover_accepted = 0;
1974 rep.flow_control = conn_param->flow_control;
1975 rep.rnr_retry_count = conn_param->rnr_retry_count;
1976 rep.srq = id_priv->srq ? 1 : 0;
1977
1978 return ib_send_cm_rep(id_priv->cm_id.ib, &rep);
1979}
1980
07ebafba
TT		 1981static int cma_accept_iw(struct rdma_id_private *id_priv,
1982 struct rdma_conn_param *conn_param)
1983{
1984 struct iw_cm_conn_param iw_param;
1985 int ret;
1986
1987 ret = cma_modify_qp_rtr(&id_priv->id);
1988 if (ret)
1989 return ret;
1990
1991 iw_param.ord = conn_param->initiator_depth;
1992 iw_param.ird = conn_param->responder_resources;
1993 iw_param.private_data = conn_param->private_data;
1994 iw_param.private_data_len = conn_param->private_data_len;
1995 if (id_priv->id.qp) {
1996 iw_param.qpn = id_priv->qp_num;
1997 } else
1998 iw_param.qpn = conn_param->qp_num;
1999
2000 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2001}
2002
e51060f0
SH		 2003int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2004{
2005 struct rdma_id_private *id_priv;
2006 int ret;
2007
2008 id_priv = container_of(id, struct rdma_id_private, id);
2009 if (!cma_comp(id_priv, CMA_CONNECT))
2010 return -EINVAL;
2011
2012 if (!id->qp && conn_param) {
2013 id_priv->qp_num = conn_param->qp_num;
2014 id_priv->qp_type = conn_param->qp_type;
2015 id_priv->srq = conn_param->srq;
2016 }
2017
07ebafba
TT		 2018 switch (rdma_node_get_transport(id->device->node_type)) {
2019 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2020 if (conn_param)
2021 ret = cma_accept_ib(id_priv, conn_param);
2022 else
2023 ret = cma_rep_recv(id_priv);
2024 break;
07ebafba
TT		 2025 case RDMA_TRANSPORT_IWARP:
2026 ret = cma_accept_iw(id_priv, conn_param);
2027 break;
e51060f0
SH		 2028 default:
2029 ret = -ENOSYS;
2030 break;
2031 }
2032
2033 if (ret)
2034 goto reject;
2035
2036 return 0;
2037reject:
2038 cma_modify_qp_err(id);
2039 rdma_reject(id, NULL, 0);
2040 return ret;
2041}
2042EXPORT_SYMBOL(rdma_accept);
2043
2044int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2045 u8 private_data_len)
2046{
2047 struct rdma_id_private *id_priv;
2048 int ret;
2049
2050 id_priv = container_of(id, struct rdma_id_private, id);
2051 if (!cma_comp(id_priv, CMA_CONNECT))
2052 return -EINVAL;
2053
07ebafba
TT		 2054 switch (rdma_node_get_transport(id->device->node_type)) {
2055 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2056 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2057 IB_CM_REJ_CONSUMER_DEFINED, NULL, 0,
2058 private_data, private_data_len);
2059 break;
07ebafba
TT		 2060 case RDMA_TRANSPORT_IWARP:
2061 ret = iw_cm_reject(id_priv->cm_id.iw,
2062 private_data, private_data_len);
2063 break;
e51060f0
SH		 2064 default:
2065 ret = -ENOSYS;
2066 break;
2067 }
2068 return ret;
2069}
2070EXPORT_SYMBOL(rdma_reject);
2071
2072int rdma_disconnect(struct rdma_cm_id *id)
2073{
2074 struct rdma_id_private *id_priv;
2075 int ret;
2076
2077 id_priv = container_of(id, struct rdma_id_private, id);
2078 if (!cma_comp(id_priv, CMA_CONNECT) &&
2079 !cma_comp(id_priv, CMA_DISCONNECT))
2080 return -EINVAL;
2081
07ebafba
TT		 2082 switch (rdma_node_get_transport(id->device->node_type)) {
2083 case RDMA_TRANSPORT_IB:
2084 ret = cma_modify_qp_err(id);
2085 if (ret)
2086 goto out;
e51060f0
SH		 2087 /* Initiate or respond to a disconnect. */
2088 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2089 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2090 break;
07ebafba
TT		 2091 case RDMA_TRANSPORT_IWARP:
2092 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2093 break;
e51060f0 2094 default:
07ebafba 2095 ret = -EINVAL;
e51060f0
SH		 2096 break;
2097 }
2098out:
2099 return ret;
2100}
2101EXPORT_SYMBOL(rdma_disconnect);
2102
2103static void cma_add_one(struct ib_device *device)
2104{
2105 struct cma_device *cma_dev;
2106 struct rdma_id_private *id_priv;
2107
2108 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2109 if (!cma_dev)
2110 return;
2111
2112 cma_dev->device = device;
2113 cma_dev->node_guid = device->node_guid;
2114 if (!cma_dev->node_guid)
2115 goto err;
2116
2117 init_completion(&cma_dev->comp);
2118 atomic_set(&cma_dev->refcount, 1);
2119 INIT_LIST_HEAD(&cma_dev->id_list);
2120 ib_set_client_data(device, &cma_client, cma_dev);
2121
2122 mutex_lock(&lock);
2123 list_add_tail(&cma_dev->list, &dev_list);
2124 list_for_each_entry(id_priv, &listen_any_list, list)
2125 cma_listen_on_dev(id_priv, cma_dev);
2126 mutex_unlock(&lock);
2127 return;
2128err:
2129 kfree(cma_dev);
2130}
2131
2132static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2133{
2134 enum cma_state state;
2135
2136 /* Record that we want to remove the device */
2137 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2138 if (state == CMA_DESTROYING)
2139 return 0;
2140
2141 cma_cancel_operation(id_priv, state);
2142 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2143
2144 /* Check for destruction from another callback. */
2145 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2146 return 0;
2147
2148 return cma_notify_user(id_priv, RDMA_CM_EVENT_DEVICE_REMOVAL,
2149 0, NULL, 0);
2150}
2151
2152static void cma_process_remove(struct cma_device *cma_dev)
2153{
2154 struct list_head remove_list;
2155 struct rdma_id_private *id_priv;
2156 int ret;
2157
2158 INIT_LIST_HEAD(&remove_list);
2159
2160 mutex_lock(&lock);
2161 while (!list_empty(&cma_dev->id_list)) {
2162 id_priv = list_entry(cma_dev->id_list.next,
2163 struct rdma_id_private, list);
2164
2165 if (cma_internal_listen(id_priv)) {
2166 cma_destroy_listen(id_priv);
2167 continue;
2168 }
2169
2170 list_del(&id_priv->list);
2171 list_add_tail(&id_priv->list, &remove_list);
2172 atomic_inc(&id_priv->refcount);
2173 mutex_unlock(&lock);
2174
2175 ret = cma_remove_id_dev(id_priv);
2176 cma_deref_id(id_priv);
2177 if (ret)
2178 rdma_destroy_id(&id_priv->id);
2179
2180 mutex_lock(&lock);
2181 }
2182 mutex_unlock(&lock);
2183
2184 cma_deref_dev(cma_dev);
2185 wait_for_completion(&cma_dev->comp);
2186}
2187
2188static void cma_remove_one(struct ib_device *device)
2189{
2190 struct cma_device *cma_dev;
2191
2192 cma_dev = ib_get_client_data(device, &cma_client);
2193 if (!cma_dev)
2194 return;
2195
2196 mutex_lock(&lock);
2197 list_del(&cma_dev->list);
2198 mutex_unlock(&lock);
2199
2200 cma_process_remove(cma_dev);
2201 kfree(cma_dev);
2202}
2203
2204static int cma_init(void)
2205{
2206 int ret;
2207
2208 cma_wq = create_singlethread_workqueue("rdma_cm_wq");
2209 if (!cma_wq)
2210 return -ENOMEM;
2211
c1a0b23b
MT		 2212 ib_sa_register_client(&sa_client);
2213
e51060f0
SH		 2214 ret = ib_register_client(&cma_client);
2215 if (ret)
2216 goto err;
2217 return 0;
2218
2219err:
c1a0b23b 2220 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2221 destroy_workqueue(cma_wq);
2222 return ret;
2223}
2224
2225static void cma_cleanup(void)
2226{
2227 ib_unregister_client(&cma_client);
c1a0b23b 2228 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2229 destroy_workqueue(cma_wq);
2230 idr_destroy(&sdp_ps);
2231 idr_destroy(&tcp_ps);
2232}
2233
2234module_init(cma_init);
2235module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)