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