projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
RDMA/cma: Fix synchronization with device removal in cma_iw_handler
[deliverable/linux.git] / drivers / infiniband / core / cma.c
CommitLineData
e51060f0
SH		 1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
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
be65f086
SH		 1186 if (cma_disable_remove(id_priv, CMA_CONNECT))
1187 return 0;
07ebafba 1188
be65f086 1189 memset(&event, 0, sizeof event);
07ebafba
TT		 1190 switch (iw_event->event) {
1191 case IW_CM_EVENT_CLOSE:
a1b1b61f 1192 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1193 break;
1194 case IW_CM_EVENT_CONNECT_REPLY:
1195 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1196 *sin = iw_event->local_addr;
1197 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1198 *sin = iw_event->remote_addr;
881a045f
SW		 1199 switch (iw_event->status) {
1200 case 0:
a1b1b61f 1201 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1202 break;
1203 case -ECONNRESET:
1204 case -ECONNREFUSED:
1205 event.event = RDMA_CM_EVENT_REJECTED;
1206 break;
1207 case -ETIMEDOUT:
1208 event.event = RDMA_CM_EVENT_UNREACHABLE;
1209 break;
1210 default:
1211 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1212 break;
1213 }
07ebafba
TT		 1214 break;
1215 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1216 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1217 break;
1218 default:
1219 BUG_ON(1);
1220 }
1221
a1b1b61f
SH		 1222 event.status = iw_event->status;
1223 event.param.conn.private_data = iw_event->private_data;
1224 event.param.conn.private_data_len = iw_event->private_data_len;
1225 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1226 if (ret) {
1227 /* Destroy the CM ID by returning a non-zero value. */
1228 id_priv->cm_id.iw = NULL;
1229 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 1230 cma_enable_remove(id_priv);
07ebafba
TT		 1231 rdma_destroy_id(&id_priv->id);
1232 return ret;
1233 }
1234
8aa08602 1235 cma_enable_remove(id_priv);
07ebafba
TT		 1236 return ret;
1237}
1238
1239static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1240 struct iw_cm_event *iw_event)
1241{
1242 struct rdma_cm_id *new_cm_id;
1243 struct rdma_id_private *listen_id, *conn_id;
1244 struct sockaddr_in *sin;
1245 struct net_device *dev = NULL;
a1b1b61f 1246 struct rdma_cm_event event;
07ebafba
TT		 1247 int ret;
1248
1249 listen_id = cm_id->context;
8aa08602
SH		 1250 if (cma_disable_remove(listen_id, CMA_LISTEN))
1251 return -ECONNABORTED;
07ebafba
TT		 1252
1253 /* Create a new RDMA id for the new IW CM ID */
1254 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1255 listen_id->id.context,
1256 RDMA_PS_TCP);
1257 if (!new_cm_id) {
1258 ret = -ENOMEM;
1259 goto out;
1260 }
1261 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1262 atomic_inc(&conn_id->dev_remove);
1263 conn_id->state = CMA_CONNECT;
1264
1265 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
1266 if (!dev) {
1267 ret = -EADDRNOTAVAIL;
8aa08602 1268 cma_enable_remove(conn_id);
07ebafba
TT		 1269 rdma_destroy_id(new_cm_id);
1270 goto out;
1271 }
1272 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1273 if (ret) {
8aa08602 1274 cma_enable_remove(conn_id);
07ebafba
TT		 1275 rdma_destroy_id(new_cm_id);
1276 goto out;
1277 }
1278
61a73c70 1279 mutex_lock(&lock);
07ebafba 1280 ret = cma_acquire_dev(conn_id);
61a73c70 1281 mutex_unlock(&lock);
07ebafba 1282 if (ret) {
8aa08602 1283 cma_enable_remove(conn_id);
07ebafba
TT		 1284 rdma_destroy_id(new_cm_id);
1285 goto out;
1286 }
1287
1288 conn_id->cm_id.iw = cm_id;
1289 cm_id->context = conn_id;
1290 cm_id->cm_handler = cma_iw_handler;
1291
1292 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1293 *sin = iw_event->local_addr;
1294 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1295 *sin = iw_event->remote_addr;
1296
a1b1b61f
SH		 1297 memset(&event, 0, sizeof event);
1298 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1299 event.param.conn.private_data = iw_event->private_data;
1300 event.param.conn.private_data_len = iw_event->private_data_len;
1301 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1302 if (ret) {
1303 /* User wants to destroy the CM ID */
1304 conn_id->cm_id.iw = NULL;
1305 cma_exch(conn_id, CMA_DESTROYING);
8aa08602 1306 cma_enable_remove(conn_id);
07ebafba
TT		 1307 rdma_destroy_id(&conn_id->id);
1308 }
1309
1310out:
1311 if (dev)
1312 dev_put(dev);
8aa08602 1313 cma_enable_remove(listen_id);
07ebafba
TT		 1314 return ret;
1315}
1316
e51060f0
SH		 1317static int cma_ib_listen(struct rdma_id_private *id_priv)
1318{
1319 struct ib_cm_compare_data compare_data;
1320 struct sockaddr *addr;
1321 __be64 svc_id;
1322 int ret;
1323
1324 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1325 id_priv);
1326 if (IS_ERR(id_priv->cm_id.ib))
1327 return PTR_ERR(id_priv->cm_id.ib);
1328
1329 addr = &id_priv->id.route.addr.src_addr;
1330 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1331 if (cma_any_addr(addr))
1332 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1333 else {
1334 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1335 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1336 }
1337
1338 if (ret) {
1339 ib_destroy_cm_id(id_priv->cm_id.ib);
1340 id_priv->cm_id.ib = NULL;
1341 }
1342
1343 return ret;
1344}
1345
07ebafba
TT		 1346static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1347{
1348 int ret;
1349 struct sockaddr_in *sin;
1350
1351 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1352 iw_conn_req_handler,
1353 id_priv);
1354 if (IS_ERR(id_priv->cm_id.iw))
1355 return PTR_ERR(id_priv->cm_id.iw);
1356
1357 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1358 id_priv->cm_id.iw->local_addr = *sin;
1359
1360 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1361
1362 if (ret) {
1363 iw_destroy_cm_id(id_priv->cm_id.iw);
1364 id_priv->cm_id.iw = NULL;
1365 }
1366
1367 return ret;
1368}
1369
e51060f0
SH		 1370static int cma_listen_handler(struct rdma_cm_id *id,
1371 struct rdma_cm_event *event)
1372{
1373 struct rdma_id_private *id_priv = id->context;
1374
1375 id->context = id_priv->id.context;
1376 id->event_handler = id_priv->id.event_handler;
1377 return id_priv->id.event_handler(id, event);
1378}
1379
1380static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1381 struct cma_device *cma_dev)
1382{
1383 struct rdma_id_private *dev_id_priv;
1384 struct rdma_cm_id *id;
1385 int ret;
1386
1387 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1388 if (IS_ERR(id))
1389 return;
1390
1391 dev_id_priv = container_of(id, struct rdma_id_private, id);
1392
1393 dev_id_priv->state = CMA_ADDR_BOUND;
1394 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1395 ip_addr_size(&id_priv->id.route.addr.src_addr));
1396
1397 cma_attach_to_dev(dev_id_priv, cma_dev);
1398 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1399
1400 ret = rdma_listen(id, id_priv->backlog);
1401 if (ret)
1402 goto err;
1403
1404 return;
1405err:
1406 cma_destroy_listen(dev_id_priv);
1407}
1408
1409static void cma_listen_on_all(struct rdma_id_private *id_priv)
1410{
1411 struct cma_device *cma_dev;
1412
1413 mutex_lock(&lock);
1414 list_add_tail(&id_priv->list, &listen_any_list);
1415 list_for_each_entry(cma_dev, &dev_list, list)
1416 cma_listen_on_dev(id_priv, cma_dev);
1417 mutex_unlock(&lock);
1418}
1419
1420static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1421{
1422 struct sockaddr_in addr_in;
1423
1424 memset(&addr_in, 0, sizeof addr_in);
1425 addr_in.sin_family = af;
1426 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1427}
1428
1429int rdma_listen(struct rdma_cm_id *id, int backlog)
1430{
1431 struct rdma_id_private *id_priv;
1432 int ret;
1433
1434 id_priv = container_of(id, struct rdma_id_private, id);
1435 if (id_priv->state == CMA_IDLE) {
1436 ret = cma_bind_any(id, AF_INET);
1437 if (ret)
1438 return ret;
1439 }
1440
1441 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1442 return -EINVAL;
1443
1444 id_priv->backlog = backlog;
1445 if (id->device) {
07ebafba
TT		 1446 switch (rdma_node_get_transport(id->device->node_type)) {
1447 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1448 ret = cma_ib_listen(id_priv);
1449 if (ret)
1450 goto err;
1451 break;
07ebafba
TT		 1452 case RDMA_TRANSPORT_IWARP:
1453 ret = cma_iw_listen(id_priv, backlog);
1454 if (ret)
1455 goto err;
1456 break;
e51060f0
SH		 1457 default:
1458 ret = -ENOSYS;
1459 goto err;
1460 }
1461 } else
1462 cma_listen_on_all(id_priv);
1463
1464 return 0;
1465err:
1466 id_priv->backlog = 0;
1467 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1468 return ret;
1469}
1470EXPORT_SYMBOL(rdma_listen);
1471
1472static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1473 void *context)
1474{
1475 struct cma_work *work = context;
1476 struct rdma_route *route;
1477
1478 route = &work->id->id.route;
1479
1480 if (!status) {
1481 route->num_paths = 1;
1482 *route->path_rec = *path_rec;
1483 } else {
1484 work->old_state = CMA_ROUTE_QUERY;
1485 work->new_state = CMA_ADDR_RESOLVED;
1486 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1487 work->event.status = status;
e51060f0
SH		 1488 }
1489
1490 queue_work(cma_wq, &work->work);
1491}
1492
1493static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1494 struct cma_work *work)
1495{
1496 struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr;
1497 struct ib_sa_path_rec path_rec;
1498
1499 memset(&path_rec, 0, sizeof path_rec);
f0ee3404
MT		 1500 ib_addr_get_sgid(addr, &path_rec.sgid);
1501 ib_addr_get_dgid(addr, &path_rec.dgid);
e51060f0
SH		 1502 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr));
1503 path_rec.numb_path = 1;
962063e6 1504 path_rec.reversible = 1;
e51060f0 1505
c1a0b23b 1506 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
e51060f0
SH		 1507 id_priv->id.port_num, &path_rec,
1508 IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
962063e6
SH		 1509 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1510 IB_SA_PATH_REC_REVERSIBLE,
e51060f0
SH		 1511 timeout_ms, GFP_KERNEL,
1512 cma_query_handler, work, &id_priv->query);
1513
1514 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1515}
1516
c4028958 1517static void cma_work_handler(struct work_struct *_work)
e51060f0 1518{
c4028958 1519 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1520 struct rdma_id_private *id_priv = work->id;
1521 int destroy = 0;
1522
1523 atomic_inc(&id_priv->dev_remove);
1524 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1525 goto out;
1526
1527 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1528 cma_exch(id_priv, CMA_DESTROYING);
1529 destroy = 1;
1530 }
1531out:
8aa08602 1532 cma_enable_remove(id_priv);
e51060f0
SH		 1533 cma_deref_id(id_priv);
1534 if (destroy)
1535 rdma_destroy_id(&id_priv->id);
1536 kfree(work);
1537}
1538
1539static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1540{
1541 struct rdma_route *route = &id_priv->id.route;
1542 struct cma_work *work;
1543 int ret;
1544
1545 work = kzalloc(sizeof *work, GFP_KERNEL);
1546 if (!work)
1547 return -ENOMEM;
1548
1549 work->id = id_priv;
c4028958 1550 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1551 work->old_state = CMA_ROUTE_QUERY;
1552 work->new_state = CMA_ROUTE_RESOLVED;
1553 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1554
1555 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1556 if (!route->path_rec) {
1557 ret = -ENOMEM;
1558 goto err1;
1559 }
1560
1561 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1562 if (ret)
1563 goto err2;
1564
1565 return 0;
1566err2:
1567 kfree(route->path_rec);
1568 route->path_rec = NULL;
1569err1:
1570 kfree(work);
1571 return ret;
1572}
1573
1574int rdma_set_ib_paths(struct rdma_cm_id *id,
1575 struct ib_sa_path_rec *path_rec, int num_paths)
1576{
1577 struct rdma_id_private *id_priv;
1578 int ret;
1579
1580 id_priv = container_of(id, struct rdma_id_private, id);
1581 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1582 return -EINVAL;
1583
1584 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1585 if (!id->route.path_rec) {
1586 ret = -ENOMEM;
1587 goto err;
1588 }
1589
1590 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1591 return 0;
1592err:
1593 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1594 return ret;
1595}
1596EXPORT_SYMBOL(rdma_set_ib_paths);
1597
07ebafba
TT		 1598static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1599{
1600 struct cma_work *work;
1601
1602 work = kzalloc(sizeof *work, GFP_KERNEL);
1603 if (!work)
1604 return -ENOMEM;
1605
1606 work->id = id_priv;
c4028958 1607 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1608 work->old_state = CMA_ROUTE_QUERY;
1609 work->new_state = CMA_ROUTE_RESOLVED;
1610 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1611 queue_work(cma_wq, &work->work);
1612 return 0;
1613}
1614
e51060f0
SH		 1615int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1616{
1617 struct rdma_id_private *id_priv;
1618 int ret;
1619
1620 id_priv = container_of(id, struct rdma_id_private, id);
1621 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1622 return -EINVAL;
1623
1624 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1625 switch (rdma_node_get_transport(id->device->node_type)) {
1626 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1627 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1628 break;
07ebafba
TT		 1629 case RDMA_TRANSPORT_IWARP:
1630 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1631 break;
e51060f0
SH		 1632 default:
1633 ret = -ENOSYS;
1634 break;
1635 }
1636 if (ret)
1637 goto err;
1638
1639 return 0;
1640err:
1641 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1642 cma_deref_id(id_priv);
1643 return ret;
1644}
1645EXPORT_SYMBOL(rdma_resolve_route);
1646
1647static int cma_bind_loopback(struct rdma_id_private *id_priv)
1648{
1649 struct cma_device *cma_dev;
1650 struct ib_port_attr port_attr;
f0ee3404 1651 union ib_gid gid;
e51060f0
SH		 1652 u16 pkey;
1653 int ret;
1654 u8 p;
1655
1656 mutex_lock(&lock);
e82153b5
KK		 1657 if (list_empty(&dev_list)) {
1658 ret = -ENODEV;
1659 goto out;
1660 }
e51060f0
SH		 1661 list_for_each_entry(cma_dev, &dev_list, list)
1662 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1663 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1664 port_attr.state == IB_PORT_ACTIVE)
1665 goto port_found;
1666
e82153b5
KK		 1667 p = 1;
1668 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1669
1670port_found:
f0ee3404 1671 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1672 if (ret)
1673 goto out;
1674
1675 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1676 if (ret)
1677 goto out;
1678
f0ee3404 1679 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1680 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1681 id_priv->id.port_num = p;
1682 cma_attach_to_dev(id_priv, cma_dev);
1683out:
1684 mutex_unlock(&lock);
1685 return ret;
1686}
1687
1688static void addr_handler(int status, struct sockaddr *src_addr,
1689 struct rdma_dev_addr *dev_addr, void *context)
1690{
1691 struct rdma_id_private *id_priv = context;
a1b1b61f 1692 struct rdma_cm_event event;
e51060f0 1693
a1b1b61f 1694 memset(&event, 0, sizeof event);
e51060f0 1695 atomic_inc(&id_priv->dev_remove);
61a73c70
SH		 1696
1697 /*
1698 * Grab mutex to block rdma_destroy_id() from removing the device while
1699 * we're trying to acquire it.
1700 */
1701 mutex_lock(&lock);
1702 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1703 mutex_unlock(&lock);
1704 goto out;
1705 }
1706
1707 if (!status && !id_priv->cma_dev)
e51060f0 1708 status = cma_acquire_dev(id_priv);
61a73c70 1709 mutex_unlock(&lock);
e51060f0
SH		 1710
1711 if (status) {
61a73c70 1712 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1713 goto out;
a1b1b61f
SH		 1714 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1715 event.status = status;
e51060f0 1716 } else {
e51060f0
SH		 1717 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1718 ip_addr_size(src_addr));
a1b1b61f 1719 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1720 }
1721
a1b1b61f 1722 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1723 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 1724 cma_enable_remove(id_priv);
e51060f0
SH		 1725 cma_deref_id(id_priv);
1726 rdma_destroy_id(&id_priv->id);
1727 return;
1728 }
1729out:
8aa08602 1730 cma_enable_remove(id_priv);
e51060f0
SH		 1731 cma_deref_id(id_priv);
1732}
1733
1734static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1735{
1736 struct cma_work *work;
1737 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1738 union ib_gid gid;
e51060f0
SH		 1739 int ret;
1740
1741 work = kzalloc(sizeof *work, GFP_KERNEL);
1742 if (!work)
1743 return -ENOMEM;
1744
1745 if (!id_priv->cma_dev) {
1746 ret = cma_bind_loopback(id_priv);
1747 if (ret)
1748 goto err;
1749 }
1750
f0ee3404
MT		 1751 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1752 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1753
1754 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1755 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1756 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1757 src_in->sin_family = dst_in->sin_family;
1758 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1759 }
1760
1761 work->id = id_priv;
c4028958 1762 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1763 work->old_state = CMA_ADDR_QUERY;
1764 work->new_state = CMA_ADDR_RESOLVED;
1765 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1766 queue_work(cma_wq, &work->work);
1767 return 0;
1768err:
1769 kfree(work);
1770 return ret;
1771}
1772
1773static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1774 struct sockaddr *dst_addr)
1775{
1776 if (src_addr && src_addr->sa_family)
1777 return rdma_bind_addr(id, src_addr);
1778 else
1779 return cma_bind_any(id, dst_addr->sa_family);
1780}
1781
1782int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1783 struct sockaddr *dst_addr, int timeout_ms)
1784{
1785 struct rdma_id_private *id_priv;
1786 int ret;
1787
1788 id_priv = container_of(id, struct rdma_id_private, id);
1789 if (id_priv->state == CMA_IDLE) {
1790 ret = cma_bind_addr(id, src_addr, dst_addr);
1791 if (ret)
1792 return ret;
1793 }
1794
1795 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1796 return -EINVAL;
1797
1798 atomic_inc(&id_priv->refcount);
1799 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1800 if (cma_any_addr(dst_addr))
1801 ret = cma_resolve_loopback(id_priv);
1802 else
7a118df3
SH		 1803 ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr,
1804 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1805 timeout_ms, addr_handler, id_priv);
1806 if (ret)
1807 goto err;
1808
1809 return 0;
1810err:
1811 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1812 cma_deref_id(id_priv);
1813 return ret;
1814}
1815EXPORT_SYMBOL(rdma_resolve_addr);
1816
1817static void cma_bind_port(struct rdma_bind_list *bind_list,
1818 struct rdma_id_private *id_priv)
1819{
1820 struct sockaddr_in *sin;
1821
1822 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1823 sin->sin_port = htons(bind_list->port);
1824 id_priv->bind_list = bind_list;
1825 hlist_add_head(&id_priv->node, &bind_list->owners);
1826}
1827
1828static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1829 unsigned short snum)
1830{
1831 struct rdma_bind_list *bind_list;
aedec080 1832 int port, ret;
e51060f0 1833
cb164b8c 1834 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 1835 if (!bind_list)
1836 return -ENOMEM;
1837
aedec080
SH		 1838 do {
1839 ret = idr_get_new_above(ps, bind_list, snum, &port);
1840 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1841
1842 if (ret)
1843 goto err1;
1844
1845 if (port != snum) {
1846 ret = -EADDRNOTAVAIL;
1847 goto err2;
1848 }
1849
1850 bind_list->ps = ps;
1851 bind_list->port = (unsigned short) port;
1852 cma_bind_port(bind_list, id_priv);
1853 return 0;
1854err2:
1855 idr_remove(ps, port);
1856err1:
1857 kfree(bind_list);
1858 return ret;
1859}
e51060f0 1860
aedec080
SH		 1861static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1862{
1863 struct rdma_bind_list *bind_list;
1864 int port, ret;
1865
1866 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1867 if (!bind_list)
1868 return -ENOMEM;
1869
1870retry:
e51060f0 1871 do {
aedec080 1872 ret = idr_get_new_above(ps, bind_list, next_port, &port);
e51060f0
SH		 1873 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1874
1875 if (ret)
aedec080 1876 goto err1;
e51060f0 1877
aedec080
SH		 1878 if (port > sysctl_local_port_range[1]) {
1879 if (next_port != sysctl_local_port_range[0]) {
1880 idr_remove(ps, port);
1881 next_port = sysctl_local_port_range[0];
1882 goto retry;
1883 }
e51060f0 1884 ret = -EADDRNOTAVAIL;
aedec080 1885 goto err2;
e51060f0
SH		 1886 }
1887
aedec080
SH		 1888 if (port == sysctl_local_port_range[1])
1889 next_port = sysctl_local_port_range[0];
1890 else
1891 next_port = port + 1;
1892
e51060f0
SH		 1893 bind_list->ps = ps;
1894 bind_list->port = (unsigned short) port;
1895 cma_bind_port(bind_list, id_priv);
1896 return 0;
aedec080
SH		 1897err2:
1898 idr_remove(ps, port);
1899err1:
e51060f0
SH		 1900 kfree(bind_list);
1901 return ret;
1902}
1903
1904static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1905{
1906 struct rdma_id_private *cur_id;
1907 struct sockaddr_in *sin, *cur_sin;
1908 struct rdma_bind_list *bind_list;
1909 struct hlist_node *node;
1910 unsigned short snum;
1911
1912 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1913 snum = ntohs(sin->sin_port);
1914 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1915 return -EACCES;
1916
1917 bind_list = idr_find(ps, snum);
1918 if (!bind_list)
1919 return cma_alloc_port(ps, id_priv, snum);
1920
1921 /*
1922 * We don't support binding to any address if anyone is bound to
1923 * a specific address on the same port.
1924 */
1925 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1926 return -EADDRNOTAVAIL;
1927
1928 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
1929 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
1930 return -EADDRNOTAVAIL;
3cd96564 1931
e51060f0
SH		 1932 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
1933 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
1934 return -EADDRINUSE;
1935 }
1936
1937 cma_bind_port(bind_list, id_priv);
1938 return 0;
1939}
1940
1941static int cma_get_port(struct rdma_id_private *id_priv)
1942{
1943 struct idr *ps;
1944 int ret;
1945
1946 switch (id_priv->id.ps) {
1947 case RDMA_PS_SDP:
1948 ps = &sdp_ps;
1949 break;
1950 case RDMA_PS_TCP:
1951 ps = &tcp_ps;
1952 break;
628e5f6d
SH		 1953 case RDMA_PS_UDP:
1954 ps = &udp_ps;
1955 break;
c8f6a362
SH		 1956 case RDMA_PS_IPOIB:
1957 ps = &ipoib_ps;
1958 break;
e51060f0
SH		 1959 default:
1960 return -EPROTONOSUPPORT;
1961 }
1962
1963 mutex_lock(&lock);
1964 if (cma_any_port(&id_priv->id.route.addr.src_addr))
aedec080 1965 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 1966 else
1967 ret = cma_use_port(ps, id_priv);
1968 mutex_unlock(&lock);
1969
1970 return ret;
1971}
1972
1973int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
1974{
1975 struct rdma_id_private *id_priv;
1976 int ret;
1977
1978 if (addr->sa_family != AF_INET)
1979 return -EAFNOSUPPORT;
1980
1981 id_priv = container_of(id, struct rdma_id_private, id);
1982 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
1983 return -EINVAL;
1984
1985 if (!cma_any_addr(addr)) {
1986 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 1987 if (ret)
255d0c14
KK		 1988 goto err1;
1989
1990 mutex_lock(&lock);
1991 ret = cma_acquire_dev(id_priv);
1992 mutex_unlock(&lock);
1993 if (ret)
1994 goto err1;
e51060f0
SH		 1995 }
1996
1997 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
1998 ret = cma_get_port(id_priv);
1999 if (ret)
255d0c14 2000 goto err2;
e51060f0
SH		 2001
2002 return 0;
255d0c14
KK		 2003err2:
2004 if (!cma_any_addr(addr)) {
2005 mutex_lock(&lock);
2006 cma_detach_from_dev(id_priv);
2007 mutex_unlock(&lock);
2008 }
2009err1:
e51060f0
SH		 2010 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2011 return ret;
2012}
2013EXPORT_SYMBOL(rdma_bind_addr);
2014
2015static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2016 struct rdma_route *route)
2017{
2018 struct sockaddr_in *src4, *dst4;
2019 struct cma_hdr *cma_hdr;
2020 struct sdp_hh *sdp_hdr;
2021
2022 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2023 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2024
2025 switch (ps) {
2026 case RDMA_PS_SDP:
2027 sdp_hdr = hdr;
2028 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2029 return -EINVAL;
2030 sdp_set_ip_ver(sdp_hdr, 4);
2031 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2032 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2033 sdp_hdr->port = src4->sin_port;
2034 break;
2035 default:
2036 cma_hdr = hdr;
2037 cma_hdr->cma_version = CMA_VERSION;
2038 cma_set_ip_ver(cma_hdr, 4);
2039 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2040 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2041 cma_hdr->port = src4->sin_port;
2042 break;
2043 }
2044 return 0;
2045}
2046
628e5f6d
SH		 2047static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2048 struct ib_cm_event *ib_event)
2049{
2050 struct rdma_id_private *id_priv = cm_id->context;
2051 struct rdma_cm_event event;
2052 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2053 int ret = 0;
2054
8aa08602
SH		 2055 if (cma_disable_remove(id_priv, CMA_CONNECT))
2056 return 0;
628e5f6d 2057
8aa08602 2058 memset(&event, 0, sizeof event);
628e5f6d
SH		 2059 switch (ib_event->event) {
2060 case IB_CM_SIDR_REQ_ERROR:
2061 event.event = RDMA_CM_EVENT_UNREACHABLE;
2062 event.status = -ETIMEDOUT;
2063 break;
2064 case IB_CM_SIDR_REP_RECEIVED:
2065 event.param.ud.private_data = ib_event->private_data;
2066 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2067 if (rep->status != IB_SIDR_SUCCESS) {
2068 event.event = RDMA_CM_EVENT_UNREACHABLE;
2069 event.status = ib_event->param.sidr_rep_rcvd.status;
2070 break;
2071 }
c8f6a362 2072 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2073 event.event = RDMA_CM_EVENT_UNREACHABLE;
2074 event.status = -EINVAL;
2075 break;
2076 }
2077 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2078 id_priv->id.route.path_rec,
2079 &event.param.ud.ah_attr);
2080 event.param.ud.qp_num = rep->qpn;
2081 event.param.ud.qkey = rep->qkey;
2082 event.event = RDMA_CM_EVENT_ESTABLISHED;
2083 event.status = 0;
2084 break;
2085 default:
2086 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
2087 ib_event->event);
2088 goto out;
2089 }
2090
2091 ret = id_priv->id.event_handler(&id_priv->id, &event);
2092 if (ret) {
2093 /* Destroy the CM ID by returning a non-zero value. */
2094 id_priv->cm_id.ib = NULL;
2095 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 2096 cma_enable_remove(id_priv);
628e5f6d
SH		 2097 rdma_destroy_id(&id_priv->id);
2098 return ret;
2099 }
2100out:
8aa08602 2101 cma_enable_remove(id_priv);
628e5f6d
SH		 2102 return ret;
2103}
2104
2105static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2106 struct rdma_conn_param *conn_param)
2107{
2108 struct ib_cm_sidr_req_param req;
2109 struct rdma_route *route;
2110 int ret;
2111
2112 req.private_data_len = sizeof(struct cma_hdr) +
2113 conn_param->private_data_len;
2114 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2115 if (!req.private_data)
2116 return -ENOMEM;
2117
2118 if (conn_param->private_data && conn_param->private_data_len)
2119 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2120 conn_param->private_data, conn_param->private_data_len);
2121
2122 route = &id_priv->id.route;
2123 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2124 if (ret)
2125 goto out;
2126
2127 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2128 cma_sidr_rep_handler, id_priv);
2129 if (IS_ERR(id_priv->cm_id.ib)) {
2130 ret = PTR_ERR(id_priv->cm_id.ib);
2131 goto out;
2132 }
2133
2134 req.path = route->path_rec;
2135 req.service_id = cma_get_service_id(id_priv->id.ps,
2136 &route->addr.dst_addr);
2137 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2138 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2139
2140 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2141 if (ret) {
2142 ib_destroy_cm_id(id_priv->cm_id.ib);
2143 id_priv->cm_id.ib = NULL;
2144 }
2145out:
2146 kfree(req.private_data);
2147 return ret;
2148}
2149
e51060f0
SH		 2150static int cma_connect_ib(struct rdma_id_private *id_priv,
2151 struct rdma_conn_param *conn_param)
2152{
2153 struct ib_cm_req_param req;
2154 struct rdma_route *route;
2155 void *private_data;
2156 int offset, ret;
2157
2158 memset(&req, 0, sizeof req);
2159 offset = cma_user_data_offset(id_priv->id.ps);
2160 req.private_data_len = offset + conn_param->private_data_len;
2161 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2162 if (!private_data)
2163 return -ENOMEM;
2164
2165 if (conn_param->private_data && conn_param->private_data_len)
2166 memcpy(private_data + offset, conn_param->private_data,
2167 conn_param->private_data_len);
2168
2169 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2170 id_priv);
2171 if (IS_ERR(id_priv->cm_id.ib)) {
2172 ret = PTR_ERR(id_priv->cm_id.ib);
2173 goto out;
2174 }
2175
2176 route = &id_priv->id.route;
2177 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2178 if (ret)
2179 goto out;
2180 req.private_data = private_data;
2181
2182 req.primary_path = &route->path_rec[0];
2183 if (route->num_paths == 2)
2184 req.alternate_path = &route->path_rec[1];
2185
2186 req.service_id = cma_get_service_id(id_priv->id.ps,
2187 &route->addr.dst_addr);
2188 req.qp_num = id_priv->qp_num;
9b2e9c0c 2189 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2190 req.starting_psn = id_priv->seq_num;
2191 req.responder_resources = conn_param->responder_resources;
2192 req.initiator_depth = conn_param->initiator_depth;
2193 req.flow_control = conn_param->flow_control;
2194 req.retry_count = conn_param->retry_count;
2195 req.rnr_retry_count = conn_param->rnr_retry_count;
2196 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2197 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2198 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2199 req.srq = id_priv->srq ? 1 : 0;
2200
2201 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2202out:
675a027c
KK		 2203 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2204 ib_destroy_cm_id(id_priv->cm_id.ib);
2205 id_priv->cm_id.ib = NULL;
2206 }
2207
e51060f0
SH		 2208 kfree(private_data);
2209 return ret;
2210}
2211
07ebafba
TT		 2212static int cma_connect_iw(struct rdma_id_private *id_priv,
2213 struct rdma_conn_param *conn_param)
2214{
2215 struct iw_cm_id *cm_id;
2216 struct sockaddr_in* sin;
2217 int ret;
2218 struct iw_cm_conn_param iw_param;
2219
2220 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2221 if (IS_ERR(cm_id)) {
2222 ret = PTR_ERR(cm_id);
2223 goto out;
2224 }
2225
2226 id_priv->cm_id.iw = cm_id;
2227
2228 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2229 cm_id->local_addr = *sin;
2230
2231 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2232 cm_id->remote_addr = *sin;
2233
2234 ret = cma_modify_qp_rtr(&id_priv->id);
675a027c
KK		 2235 if (ret)
2236 goto out;
07ebafba
TT		 2237
2238 iw_param.ord = conn_param->initiator_depth;
2239 iw_param.ird = conn_param->responder_resources;
2240 iw_param.private_data = conn_param->private_data;
2241 iw_param.private_data_len = conn_param->private_data_len;
2242 if (id_priv->id.qp)
2243 iw_param.qpn = id_priv->qp_num;
2244 else
2245 iw_param.qpn = conn_param->qp_num;
2246 ret = iw_cm_connect(cm_id, &iw_param);
2247out:
675a027c
KK		 2248 if (ret && !IS_ERR(cm_id)) {
2249 iw_destroy_cm_id(cm_id);
2250 id_priv->cm_id.iw = NULL;
2251 }
07ebafba
TT		 2252 return ret;
2253}
2254
e51060f0
SH		 2255int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2256{
2257 struct rdma_id_private *id_priv;
2258 int ret;
2259
2260 id_priv = container_of(id, struct rdma_id_private, id);
2261 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2262 return -EINVAL;
2263
2264 if (!id->qp) {
2265 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2266 id_priv->srq = conn_param->srq;
2267 }
2268
07ebafba
TT		 2269 switch (rdma_node_get_transport(id->device->node_type)) {
2270 case RDMA_TRANSPORT_IB:
c8f6a362 2271 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2272 ret = cma_resolve_ib_udp(id_priv, conn_param);
2273 else
2274 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2275 break;
07ebafba
TT		 2276 case RDMA_TRANSPORT_IWARP:
2277 ret = cma_connect_iw(id_priv, conn_param);
2278 break;
e51060f0
SH		 2279 default:
2280 ret = -ENOSYS;
2281 break;
2282 }
2283 if (ret)
2284 goto err;
2285
2286 return 0;
2287err:
2288 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2289 return ret;
2290}
2291EXPORT_SYMBOL(rdma_connect);
2292
2293static int cma_accept_ib(struct rdma_id_private *id_priv,
2294 struct rdma_conn_param *conn_param)
2295{
2296 struct ib_cm_rep_param rep;
0fe313b0
SH		 2297 struct ib_qp_attr qp_attr;
2298 int qp_attr_mask, ret;
e51060f0 2299
0fe313b0
SH		 2300 if (id_priv->id.qp) {
2301 ret = cma_modify_qp_rtr(&id_priv->id);
2302 if (ret)
2303 goto out;
2304
2305 qp_attr.qp_state = IB_QPS_RTS;
2306 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr,
2307 &qp_attr_mask);
2308 if (ret)
2309 goto out;
2310
2311 qp_attr.max_rd_atomic = conn_param->initiator_depth;
2312 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
2313 if (ret)
2314 goto out;
2315 }
e51060f0
SH		 2316
2317 memset(&rep, 0, sizeof rep);
2318 rep.qp_num = id_priv->qp_num;
2319 rep.starting_psn = id_priv->seq_num;
2320 rep.private_data = conn_param->private_data;
2321 rep.private_data_len = conn_param->private_data_len;
2322 rep.responder_resources = conn_param->responder_resources;
2323 rep.initiator_depth = conn_param->initiator_depth;
2324 rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT;
2325 rep.failover_accepted = 0;
2326 rep.flow_control = conn_param->flow_control;
2327 rep.rnr_retry_count = conn_param->rnr_retry_count;
2328 rep.srq = id_priv->srq ? 1 : 0;
2329
0fe313b0
SH		 2330 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2331out:
2332 return ret;
e51060f0
SH		 2333}
2334
07ebafba
TT		 2335static int cma_accept_iw(struct rdma_id_private *id_priv,
2336 struct rdma_conn_param *conn_param)
2337{
2338 struct iw_cm_conn_param iw_param;
2339 int ret;
2340
2341 ret = cma_modify_qp_rtr(&id_priv->id);
2342 if (ret)
2343 return ret;
2344
2345 iw_param.ord = conn_param->initiator_depth;
2346 iw_param.ird = conn_param->responder_resources;
2347 iw_param.private_data = conn_param->private_data;
2348 iw_param.private_data_len = conn_param->private_data_len;
2349 if (id_priv->id.qp) {
2350 iw_param.qpn = id_priv->qp_num;
2351 } else
2352 iw_param.qpn = conn_param->qp_num;
2353
2354 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2355}
2356
628e5f6d
SH		 2357static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2358 enum ib_cm_sidr_status status,
2359 const void *private_data, int private_data_len)
2360{
2361 struct ib_cm_sidr_rep_param rep;
2362
2363 memset(&rep, 0, sizeof rep);
2364 rep.status = status;
2365 if (status == IB_SIDR_SUCCESS) {
2366 rep.qp_num = id_priv->qp_num;
c8f6a362 2367 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2368 }
2369 rep.private_data = private_data;
2370 rep.private_data_len = private_data_len;
2371
2372 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2373}
2374
e51060f0
SH		 2375int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2376{
2377 struct rdma_id_private *id_priv;
2378 int ret;
2379
2380 id_priv = container_of(id, struct rdma_id_private, id);
2381 if (!cma_comp(id_priv, CMA_CONNECT))
2382 return -EINVAL;
2383
2384 if (!id->qp && conn_param) {
2385 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2386 id_priv->srq = conn_param->srq;
2387 }
2388
07ebafba
TT		 2389 switch (rdma_node_get_transport(id->device->node_type)) {
2390 case RDMA_TRANSPORT_IB:
c8f6a362 2391 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2392 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2393 conn_param->private_data,
2394 conn_param->private_data_len);
2395 else if (conn_param)
e51060f0
SH		 2396 ret = cma_accept_ib(id_priv, conn_param);
2397 else
2398 ret = cma_rep_recv(id_priv);
2399 break;
07ebafba
TT		 2400 case RDMA_TRANSPORT_IWARP:
2401 ret = cma_accept_iw(id_priv, conn_param);
2402 break;
e51060f0
SH		 2403 default:
2404 ret = -ENOSYS;
2405 break;
2406 }
2407
2408 if (ret)
2409 goto reject;
2410
2411 return 0;
2412reject:
2413 cma_modify_qp_err(id);
2414 rdma_reject(id, NULL, 0);
2415 return ret;
2416}
2417EXPORT_SYMBOL(rdma_accept);
2418
0fe313b0
SH		 2419int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2420{
2421 struct rdma_id_private *id_priv;
2422 int ret;
2423
2424 id_priv = container_of(id, struct rdma_id_private, id);
2425 if (!cma_comp(id_priv, CMA_CONNECT))
2426 return -EINVAL;
2427
2428 switch (id->device->node_type) {
2429 case RDMA_NODE_IB_CA:
2430 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2431 break;
2432 default:
2433 ret = 0;
2434 break;
2435 }
2436 return ret;
2437}
2438EXPORT_SYMBOL(rdma_notify);
2439
e51060f0
SH		 2440int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2441 u8 private_data_len)
2442{
2443 struct rdma_id_private *id_priv;
2444 int ret;
2445
2446 id_priv = container_of(id, struct rdma_id_private, id);
2447 if (!cma_comp(id_priv, CMA_CONNECT))
2448 return -EINVAL;
2449
07ebafba
TT		 2450 switch (rdma_node_get_transport(id->device->node_type)) {
2451 case RDMA_TRANSPORT_IB:
c8f6a362 2452 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2453 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2454 private_data, private_data_len);
2455 else
2456 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2457 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2458 0, private_data, private_data_len);
e51060f0 2459 break;
07ebafba
TT		 2460 case RDMA_TRANSPORT_IWARP:
2461 ret = iw_cm_reject(id_priv->cm_id.iw,
2462 private_data, private_data_len);
2463 break;
e51060f0
SH		 2464 default:
2465 ret = -ENOSYS;
2466 break;
2467 }
2468 return ret;
2469}
2470EXPORT_SYMBOL(rdma_reject);
2471
2472int rdma_disconnect(struct rdma_cm_id *id)
2473{
2474 struct rdma_id_private *id_priv;
2475 int ret;
2476
2477 id_priv = container_of(id, struct rdma_id_private, id);
2478 if (!cma_comp(id_priv, CMA_CONNECT) &&
2479 !cma_comp(id_priv, CMA_DISCONNECT))
2480 return -EINVAL;
2481
07ebafba
TT		 2482 switch (rdma_node_get_transport(id->device->node_type)) {
2483 case RDMA_TRANSPORT_IB:
2484 ret = cma_modify_qp_err(id);
2485 if (ret)
2486 goto out;
e51060f0
SH		 2487 /* Initiate or respond to a disconnect. */
2488 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2489 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2490 break;
07ebafba
TT		 2491 case RDMA_TRANSPORT_IWARP:
2492 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2493 break;
e51060f0 2494 default:
07ebafba 2495 ret = -EINVAL;
e51060f0
SH		 2496 break;
2497 }
2498out:
2499 return ret;
2500}
2501EXPORT_SYMBOL(rdma_disconnect);
2502
c8f6a362
SH		 2503static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2504{
2505 struct rdma_id_private *id_priv;
2506 struct cma_multicast *mc = multicast->context;
2507 struct rdma_cm_event event;
2508 int ret;
2509
2510 id_priv = mc->id_priv;
8aa08602
SH		 2511 if (cma_disable_remove(id_priv, CMA_ADDR_BOUND) &&
2512 cma_disable_remove(id_priv, CMA_ADDR_RESOLVED))
2513 return 0;
c8f6a362
SH		 2514
2515 if (!status && id_priv->id.qp)
2516 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2517 multicast->rec.mlid);
2518
2519 memset(&event, 0, sizeof event);
2520 event.status = status;
2521 event.param.ud.private_data = mc->context;
2522 if (!status) {
2523 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2524 ib_init_ah_from_mcmember(id_priv->id.device,
2525 id_priv->id.port_num, &multicast->rec,
2526 &event.param.ud.ah_attr);
2527 event.param.ud.qp_num = 0xFFFFFF;
2528 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2529 } else
2530 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2531
2532 ret = id_priv->id.event_handler(&id_priv->id, &event);
2533 if (ret) {
2534 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 2535 cma_enable_remove(id_priv);
c8f6a362
SH		 2536 rdma_destroy_id(&id_priv->id);
2537 return 0;
2538 }
8aa08602
SH		 2539
2540 cma_enable_remove(id_priv);
c8f6a362
SH		 2541 return 0;
2542}
2543
2544static void cma_set_mgid(struct rdma_id_private *id_priv,
2545 struct sockaddr *addr, union ib_gid *mgid)
2546{
2547 unsigned char mc_map[MAX_ADDR_LEN];
2548 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2549 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2550 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2551
2552 if (cma_any_addr(addr)) {
2553 memset(mgid, 0, sizeof *mgid);
2554 } else if ((addr->sa_family == AF_INET6) &&
2555 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) ==
2556 0xFF10A01B)) {
2557 /* IPv6 address is an SA assigned MGID. */
2558 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2559 } else {
2560 ip_ib_mc_map(sin->sin_addr.s_addr, mc_map);
2561 if (id_priv->id.ps == RDMA_PS_UDP)
2562 mc_map[7] = 0x01; /* Use RDMA CM signature */
2563 mc_map[8] = ib_addr_get_pkey(dev_addr) >> 8;
2564 mc_map[9] = (unsigned char) ib_addr_get_pkey(dev_addr);
2565 *mgid = *(union ib_gid *) (mc_map + 4);
2566 }
2567}
2568
2569static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2570 struct cma_multicast *mc)
2571{
2572 struct ib_sa_mcmember_rec rec;
2573 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2574 ib_sa_comp_mask comp_mask;
2575 int ret;
2576
2577 ib_addr_get_mgid(dev_addr, &rec.mgid);
2578 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2579 &rec.mgid, &rec);
2580 if (ret)
2581 return ret;
2582
2583 cma_set_mgid(id_priv, &mc->addr, &rec.mgid);
2584 if (id_priv->id.ps == RDMA_PS_UDP)
2585 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2586 ib_addr_get_sgid(dev_addr, &rec.port_gid);
2587 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2588 rec.join_state = 1;
2589
2590 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2591 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2592 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2593 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2594 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2595
2596 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2597 id_priv->id.port_num, &rec,
2598 comp_mask, GFP_KERNEL,
2599 cma_ib_mc_handler, mc);
2600 if (IS_ERR(mc->multicast.ib))
2601 return PTR_ERR(mc->multicast.ib);
2602
2603 return 0;
2604}
2605
2606int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2607 void *context)
2608{
2609 struct rdma_id_private *id_priv;
2610 struct cma_multicast *mc;
2611 int ret;
2612
2613 id_priv = container_of(id, struct rdma_id_private, id);
2614 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2615 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2616 return -EINVAL;
2617
2618 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2619 if (!mc)
2620 return -ENOMEM;
2621
2622 memcpy(&mc->addr, addr, ip_addr_size(addr));
2623 mc->context = context;
2624 mc->id_priv = id_priv;
2625
2626 spin_lock(&id_priv->lock);
2627 list_add(&mc->list, &id_priv->mc_list);
2628 spin_unlock(&id_priv->lock);
2629
2630 switch (rdma_node_get_transport(id->device->node_type)) {
2631 case RDMA_TRANSPORT_IB:
2632 ret = cma_join_ib_multicast(id_priv, mc);
2633 break;
2634 default:
2635 ret = -ENOSYS;
2636 break;
2637 }
2638
2639 if (ret) {
2640 spin_lock_irq(&id_priv->lock);
2641 list_del(&mc->list);
2642 spin_unlock_irq(&id_priv->lock);
2643 kfree(mc);
2644 }
2645 return ret;
2646}
2647EXPORT_SYMBOL(rdma_join_multicast);
2648
2649void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2650{
2651 struct rdma_id_private *id_priv;
2652 struct cma_multicast *mc;
2653
2654 id_priv = container_of(id, struct rdma_id_private, id);
2655 spin_lock_irq(&id_priv->lock);
2656 list_for_each_entry(mc, &id_priv->mc_list, list) {
2657 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2658 list_del(&mc->list);
2659 spin_unlock_irq(&id_priv->lock);
2660
2661 if (id->qp)
2662 ib_detach_mcast(id->qp,
2663 &mc->multicast.ib->rec.mgid,
2664 mc->multicast.ib->rec.mlid);
2665 ib_sa_free_multicast(mc->multicast.ib);
2666 kfree(mc);
2667 return;
2668 }
2669 }
2670 spin_unlock_irq(&id_priv->lock);
2671}
2672EXPORT_SYMBOL(rdma_leave_multicast);
2673
e51060f0
SH		 2674static void cma_add_one(struct ib_device *device)
2675{
2676 struct cma_device *cma_dev;
2677 struct rdma_id_private *id_priv;
2678
2679 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2680 if (!cma_dev)
2681 return;
2682
2683 cma_dev->device = device;
e51060f0
SH		 2684
2685 init_completion(&cma_dev->comp);
2686 atomic_set(&cma_dev->refcount, 1);
2687 INIT_LIST_HEAD(&cma_dev->id_list);
2688 ib_set_client_data(device, &cma_client, cma_dev);
2689
2690 mutex_lock(&lock);
2691 list_add_tail(&cma_dev->list, &dev_list);
2692 list_for_each_entry(id_priv, &listen_any_list, list)
2693 cma_listen_on_dev(id_priv, cma_dev);
2694 mutex_unlock(&lock);
e51060f0
SH		 2695}
2696
2697static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2698{
a1b1b61f 2699 struct rdma_cm_event event;
e51060f0
SH		 2700 enum cma_state state;
2701
2702 /* Record that we want to remove the device */
2703 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2704 if (state == CMA_DESTROYING)
2705 return 0;
2706
2707 cma_cancel_operation(id_priv, state);
2708 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2709
2710 /* Check for destruction from another callback. */
2711 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2712 return 0;
2713
a1b1b61f
SH		 2714 memset(&event, 0, sizeof event);
2715 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
2716 return id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 2717}
2718
2719static void cma_process_remove(struct cma_device *cma_dev)
2720{
e51060f0
SH		 2721 struct rdma_id_private *id_priv;
2722 int ret;
2723
e51060f0
SH		 2724 mutex_lock(&lock);
2725 while (!list_empty(&cma_dev->id_list)) {
2726 id_priv = list_entry(cma_dev->id_list.next,
2727 struct rdma_id_private, list);
2728
2729 if (cma_internal_listen(id_priv)) {
2730 cma_destroy_listen(id_priv);
2731 continue;
2732 }
2733
94de178a 2734 list_del_init(&id_priv->list);
e51060f0
SH		 2735 atomic_inc(&id_priv->refcount);
2736 mutex_unlock(&lock);
2737
2738 ret = cma_remove_id_dev(id_priv);
2739 cma_deref_id(id_priv);
2740 if (ret)
2741 rdma_destroy_id(&id_priv->id);
2742
2743 mutex_lock(&lock);
2744 }
2745 mutex_unlock(&lock);
2746
2747 cma_deref_dev(cma_dev);
2748 wait_for_completion(&cma_dev->comp);
2749}
2750
2751static void cma_remove_one(struct ib_device *device)
2752{
2753 struct cma_device *cma_dev;
2754
2755 cma_dev = ib_get_client_data(device, &cma_client);
2756 if (!cma_dev)
2757 return;
2758
2759 mutex_lock(&lock);
2760 list_del(&cma_dev->list);
2761 mutex_unlock(&lock);
2762
2763 cma_process_remove(cma_dev);
2764 kfree(cma_dev);
2765}
2766
2767static int cma_init(void)
2768{
2769 int ret;
2770
aedec080
SH		 2771 get_random_bytes(&next_port, sizeof next_port);
2772 next_port = (next_port % (sysctl_local_port_range[1] -
2773 sysctl_local_port_range[0])) +
2774 sysctl_local_port_range[0];
c7f743a6 2775 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 2776 if (!cma_wq)
2777 return -ENOMEM;
2778
c1a0b23b 2779 ib_sa_register_client(&sa_client);
7a118df3 2780 rdma_addr_register_client(&addr_client);
c1a0b23b 2781
e51060f0
SH		 2782 ret = ib_register_client(&cma_client);
2783 if (ret)
2784 goto err;
2785 return 0;
2786
2787err:
7a118df3 2788 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2789 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2790 destroy_workqueue(cma_wq);
2791 return ret;
2792}
2793
2794static void cma_cleanup(void)
2795{
2796 ib_unregister_client(&cma_client);
7a118df3 2797 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2798 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2799 destroy_workqueue(cma_wq);
2800 idr_destroy(&sdp_ps);
2801 idr_destroy(&tcp_ps);
628e5f6d 2802 idr_destroy(&udp_ps);
c8f6a362 2803 idr_destroy(&ipoib_ps);
e51060f0
SH		 2804}
2805
2806module_init(cma_init);
2807module_exit(cma_cleanup);
Linux kernel - Deliverables
This page took 0.274306 seconds and 5 git commands to generate.