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