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[IPV4] sctp: Use ipv4_is_<type>
[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
dcb3f974 55#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
e51060f0
SH		 56
57static void cma_add_one(struct ib_device *device);
58static void cma_remove_one(struct ib_device *device);
59
60static struct ib_client cma_client = {
61 .name = "cma",
62 .add = cma_add_one,
63 .remove = cma_remove_one
64};
65
c1a0b23b 66static struct ib_sa_client sa_client;
7a118df3 67static struct rdma_addr_client addr_client;
e51060f0
SH		 68static LIST_HEAD(dev_list);
69static LIST_HEAD(listen_any_list);
70static DEFINE_MUTEX(lock);
71static struct workqueue_struct *cma_wq;
72static DEFINE_IDR(sdp_ps);
73static DEFINE_IDR(tcp_ps);
628e5f6d 74static DEFINE_IDR(udp_ps);
c8f6a362 75static DEFINE_IDR(ipoib_ps);
aedec080 76static int next_port;
e51060f0
SH		 77
78struct cma_device {
79 struct list_head list;
80 struct ib_device *device;
e51060f0
SH		 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;
d02d1f53
SH		 117 struct list_head list; /* listen_any_list or cma_device.list */
118 struct list_head listen_list; /* per device listens */
e51060f0 119 struct cma_device *cma_dev;
c8f6a362 120 struct list_head mc_list;
e51060f0 121
d02d1f53 122 int internal_id;
e51060f0
SH		 123 enum cma_state state;
124 spinlock_t lock;
c5483388
SH		 125 struct mutex qp_mutex;
126
e51060f0
SH		 127 struct completion comp;
128 atomic_t refcount;
129 wait_queue_head_t wait_remove;
130 atomic_t dev_remove;
131
132 int backlog;
133 int timeout_ms;
134 struct ib_sa_query *query;
135 int query_id;
136 union {
137 struct ib_cm_id *ib;
07ebafba 138 struct iw_cm_id *iw;
e51060f0
SH		 139 } cm_id;
140
141 u32 seq_num;
c8f6a362 142 u32 qkey;
e51060f0 143 u32 qp_num;
e51060f0 144 u8 srq;
a81c994d 145 u8 tos;
e51060f0
SH		 146};
147
c8f6a362
SH		 148struct cma_multicast {
149 struct rdma_id_private *id_priv;
150 union {
151 struct ib_sa_multicast *ib;
152 } multicast;
153 struct list_head list;
154 void *context;
155 struct sockaddr addr;
156 u8 pad[sizeof(struct sockaddr_in6) -
157 sizeof(struct sockaddr)];
158};
159
e51060f0
SH		 160struct cma_work {
161 struct work_struct work;
162 struct rdma_id_private *id;
163 enum cma_state old_state;
164 enum cma_state new_state;
165 struct rdma_cm_event event;
166};
167
168union cma_ip_addr {
169 struct in6_addr ip6;
170 struct {
171 __u32 pad[3];
172 __u32 addr;
173 } ip4;
174};
175
176struct cma_hdr {
177 u8 cma_version;
178 u8 ip_version; /* IP version: 7:4 */
179 __u16 port;
180 union cma_ip_addr src_addr;
181 union cma_ip_addr dst_addr;
182};
183
184struct sdp_hh {
185 u8 bsdh[16];
186 u8 sdp_version; /* Major version: 7:4 */
187 u8 ip_version; /* IP version: 7:4 */
188 u8 sdp_specific1[10];
189 __u16 port;
190 __u16 sdp_specific2;
191 union cma_ip_addr src_addr;
192 union cma_ip_addr dst_addr;
193};
194
195struct sdp_hah {
196 u8 bsdh[16];
197 u8 sdp_version;
198};
199
200#define CMA_VERSION 0x00
201#define SDP_MAJ_VERSION 0x2
202
203static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
204{
205 unsigned long flags;
206 int ret;
207
208 spin_lock_irqsave(&id_priv->lock, flags);
209 ret = (id_priv->state == comp);
210 spin_unlock_irqrestore(&id_priv->lock, flags);
211 return ret;
212}
213
214static int cma_comp_exch(struct rdma_id_private *id_priv,
215 enum cma_state comp, enum cma_state exch)
216{
217 unsigned long flags;
218 int ret;
219
220 spin_lock_irqsave(&id_priv->lock, flags);
221 if ((ret = (id_priv->state == comp)))
222 id_priv->state = exch;
223 spin_unlock_irqrestore(&id_priv->lock, flags);
224 return ret;
225}
226
227static enum cma_state cma_exch(struct rdma_id_private *id_priv,
228 enum cma_state exch)
229{
230 unsigned long flags;
231 enum cma_state old;
232
233 spin_lock_irqsave(&id_priv->lock, flags);
234 old = id_priv->state;
235 id_priv->state = exch;
236 spin_unlock_irqrestore(&id_priv->lock, flags);
237 return old;
238}
239
240static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
241{
242 return hdr->ip_version >> 4;
243}
244
245static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
246{
247 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
248}
249
250static inline u8 sdp_get_majv(u8 sdp_version)
251{
252 return sdp_version >> 4;
253}
254
255static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
256{
257 return hh->ip_version >> 4;
258}
259
260static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
261{
262 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
263}
264
c8f6a362
SH		 265static inline int cma_is_ud_ps(enum rdma_port_space ps)
266{
267 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
268}
269
e51060f0
SH		 270static void cma_attach_to_dev(struct rdma_id_private *id_priv,
271 struct cma_device *cma_dev)
272{
273 atomic_inc(&cma_dev->refcount);
274 id_priv->cma_dev = cma_dev;
275 id_priv->id.device = cma_dev->device;
276 list_add_tail(&id_priv->list, &cma_dev->id_list);
277}
278
279static inline void cma_deref_dev(struct cma_device *cma_dev)
280{
281 if (atomic_dec_and_test(&cma_dev->refcount))
282 complete(&cma_dev->comp);
283}
284
285static void cma_detach_from_dev(struct rdma_id_private *id_priv)
286{
287 list_del(&id_priv->list);
288 cma_deref_dev(id_priv->cma_dev);
289 id_priv->cma_dev = NULL;
290}
291
c8f6a362
SH		 292static int cma_set_qkey(struct ib_device *device, u8 port_num,
293 enum rdma_port_space ps,
294 struct rdma_dev_addr *dev_addr, u32 *qkey)
295{
296 struct ib_sa_mcmember_rec rec;
297 int ret = 0;
298
299 switch (ps) {
300 case RDMA_PS_UDP:
301 *qkey = RDMA_UDP_QKEY;
302 break;
303 case RDMA_PS_IPOIB:
304 ib_addr_get_mgid(dev_addr, &rec.mgid);
305 ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec);
306 *qkey = be32_to_cpu(rec.qkey);
307 break;
308 default:
309 break;
310 }
311 return ret;
312}
313
07ebafba 314static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 315{
c8f6a362 316 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 317 struct cma_device *cma_dev;
f0ee3404 318 union ib_gid gid;
e51060f0
SH		 319 int ret = -ENODEV;
320
c8f6a362 321 switch (rdma_node_get_transport(dev_addr->dev_type)) {
07ebafba 322 case RDMA_TRANSPORT_IB:
c8f6a362 323 ib_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 324 break;
325 case RDMA_TRANSPORT_IWARP:
c8f6a362 326 iw_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 327 break;
328 default:
329 return -ENODEV;
330 }
61a73c70 331
e51060f0 332 list_for_each_entry(cma_dev, &dev_list, list) {
f0ee3404 333 ret = ib_find_cached_gid(cma_dev->device, &gid,
e51060f0
SH		 334 &id_priv->id.port_num, NULL);
335 if (!ret) {
c8f6a362
SH		 336 ret = cma_set_qkey(cma_dev->device,
337 id_priv->id.port_num,
338 id_priv->id.ps, dev_addr,
339 &id_priv->qkey);
340 if (!ret)
341 cma_attach_to_dev(id_priv, cma_dev);
e51060f0
SH		 342 break;
343 }
344 }
e51060f0
SH		 345 return ret;
346}
347
e51060f0
SH		 348static void cma_deref_id(struct rdma_id_private *id_priv)
349{
350 if (atomic_dec_and_test(&id_priv->refcount))
351 complete(&id_priv->comp);
352}
353
8aa08602
SH		 354static int cma_disable_remove(struct rdma_id_private *id_priv,
355 enum cma_state state)
356{
357 unsigned long flags;
358 int ret;
359
360 spin_lock_irqsave(&id_priv->lock, flags);
361 if (id_priv->state == state) {
362 atomic_inc(&id_priv->dev_remove);
363 ret = 0;
364 } else
365 ret = -EINVAL;
366 spin_unlock_irqrestore(&id_priv->lock, flags);
367 return ret;
368}
369
370static void cma_enable_remove(struct rdma_id_private *id_priv)
e51060f0
SH		 371{
372 if (atomic_dec_and_test(&id_priv->dev_remove))
373 wake_up(&id_priv->wait_remove);
374}
375
6c719f5c
SH		 376static int cma_has_cm_dev(struct rdma_id_private *id_priv)
377{
378 return (id_priv->id.device && id_priv->cm_id.ib);
379}
380
e51060f0
SH		 381struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
382 void *context, enum rdma_port_space ps)
383{
384 struct rdma_id_private *id_priv;
385
386 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
387 if (!id_priv)
388 return ERR_PTR(-ENOMEM);
389
390 id_priv->state = CMA_IDLE;
391 id_priv->id.context = context;
392 id_priv->id.event_handler = event_handler;
393 id_priv->id.ps = ps;
394 spin_lock_init(&id_priv->lock);
c5483388 395 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 396 init_completion(&id_priv->comp);
397 atomic_set(&id_priv->refcount, 1);
398 init_waitqueue_head(&id_priv->wait_remove);
399 atomic_set(&id_priv->dev_remove, 0);
400 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 401 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 402 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
403
404 return &id_priv->id;
405}
406EXPORT_SYMBOL(rdma_create_id);
407
c8f6a362 408static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 409{
410 struct ib_qp_attr qp_attr;
c8f6a362 411 int qp_attr_mask, ret;
e51060f0 412
c8f6a362
SH		 413 qp_attr.qp_state = IB_QPS_INIT;
414 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 415 if (ret)
416 return ret;
417
c8f6a362
SH		 418 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
419 if (ret)
420 return ret;
421
422 qp_attr.qp_state = IB_QPS_RTR;
423 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
424 if (ret)
425 return ret;
426
427 qp_attr.qp_state = IB_QPS_RTS;
428 qp_attr.sq_psn = 0;
429 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
430
431 return ret;
e51060f0
SH		 432}
433
c8f6a362 434static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 435{
436 struct ib_qp_attr qp_attr;
c8f6a362 437 int qp_attr_mask, ret;
07ebafba
TT		 438
439 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 440 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
441 if (ret)
442 return ret;
07ebafba 443
c8f6a362 444 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 445}
446
e51060f0
SH		 447int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
448 struct ib_qp_init_attr *qp_init_attr)
449{
450 struct rdma_id_private *id_priv;
451 struct ib_qp *qp;
452 int ret;
453
454 id_priv = container_of(id, struct rdma_id_private, id);
455 if (id->device != pd->device)
456 return -EINVAL;
457
458 qp = ib_create_qp(pd, qp_init_attr);
459 if (IS_ERR(qp))
460 return PTR_ERR(qp);
461
c8f6a362
SH		 462 if (cma_is_ud_ps(id_priv->id.ps))
463 ret = cma_init_ud_qp(id_priv, qp);
464 else
465 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 466 if (ret)
467 goto err;
468
469 id->qp = qp;
470 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 471 id_priv->srq = (qp->srq != NULL);
472 return 0;
473err:
474 ib_destroy_qp(qp);
475 return ret;
476}
477EXPORT_SYMBOL(rdma_create_qp);
478
479void rdma_destroy_qp(struct rdma_cm_id *id)
480{
c5483388
SH		 481 struct rdma_id_private *id_priv;
482
483 id_priv = container_of(id, struct rdma_id_private, id);
484 mutex_lock(&id_priv->qp_mutex);
485 ib_destroy_qp(id_priv->id.qp);
486 id_priv->id.qp = NULL;
487 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 488}
489EXPORT_SYMBOL(rdma_destroy_qp);
490
5851bb89
SH		 491static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
492 struct rdma_conn_param *conn_param)
e51060f0
SH		 493{
494 struct ib_qp_attr qp_attr;
495 int qp_attr_mask, ret;
496
c5483388
SH		 497 mutex_lock(&id_priv->qp_mutex);
498 if (!id_priv->id.qp) {
499 ret = 0;
500 goto out;
501 }
e51060f0
SH		 502
503 /* Need to update QP attributes from default values. */
504 qp_attr.qp_state = IB_QPS_INIT;
c5483388 505 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 506 if (ret)
c5483388 507 goto out;
e51060f0 508
c5483388 509 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 510 if (ret)
c5483388 511 goto out;
e51060f0
SH		 512
513 qp_attr.qp_state = IB_QPS_RTR;
c5483388 514 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 515 if (ret)
c5483388 516 goto out;
e51060f0 517
5851bb89
SH		 518 if (conn_param)
519 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 520 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
521out:
522 mutex_unlock(&id_priv->qp_mutex);
523 return ret;
e51060f0
SH		 524}
525
5851bb89
SH		 526static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
527 struct rdma_conn_param *conn_param)
e51060f0
SH		 528{
529 struct ib_qp_attr qp_attr;
530 int qp_attr_mask, ret;
531
c5483388
SH		 532 mutex_lock(&id_priv->qp_mutex);
533 if (!id_priv->id.qp) {
534 ret = 0;
535 goto out;
536 }
e51060f0
SH		 537
538 qp_attr.qp_state = IB_QPS_RTS;
c5483388 539 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 540 if (ret)
c5483388 541 goto out;
e51060f0 542
5851bb89
SH		 543 if (conn_param)
544 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 545 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
546out:
547 mutex_unlock(&id_priv->qp_mutex);
548 return ret;
e51060f0
SH		 549}
550
c5483388 551static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 552{
553 struct ib_qp_attr qp_attr;
c5483388 554 int ret;
e51060f0 555
c5483388
SH		 556 mutex_lock(&id_priv->qp_mutex);
557 if (!id_priv->id.qp) {
558 ret = 0;
559 goto out;
560 }
e51060f0
SH		 561
562 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 563 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
564out:
565 mutex_unlock(&id_priv->qp_mutex);
566 return ret;
e51060f0
SH		 567}
568
c8f6a362
SH		 569static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
570 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
571{
572 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
573 int ret;
574
575 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
576 ib_addr_get_pkey(dev_addr),
577 &qp_attr->pkey_index);
578 if (ret)
579 return ret;
580
581 qp_attr->port_num = id_priv->id.port_num;
582 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
583
584 if (cma_is_ud_ps(id_priv->id.ps)) {
585 qp_attr->qkey = id_priv->qkey;
586 *qp_attr_mask |= IB_QP_QKEY;
587 } else {
588 qp_attr->qp_access_flags = 0;
589 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
590 }
591 return 0;
592}
593
e51060f0
SH		 594int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
595 int *qp_attr_mask)
596{
597 struct rdma_id_private *id_priv;
c8f6a362 598 int ret = 0;
e51060f0
SH		 599
600 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 601 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
602 case RDMA_TRANSPORT_IB:
c8f6a362
SH		 603 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
604 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
605 else
606 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
607 qp_attr_mask);
e51060f0
SH		 608 if (qp_attr->qp_state == IB_QPS_RTR)
609 qp_attr->rq_psn = id_priv->seq_num;
610 break;
07ebafba 611 case RDMA_TRANSPORT_IWARP:
c8f6a362 612 if (!id_priv->cm_id.iw) {
8f076531 613 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 614 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
615 } else
616 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
617 qp_attr_mask);
07ebafba 618 break;
e51060f0
SH		 619 default:
620 ret = -ENOSYS;
621 break;
622 }
623
624 return ret;
625}
626EXPORT_SYMBOL(rdma_init_qp_attr);
627
628static inline int cma_zero_addr(struct sockaddr *addr)
629{
630 struct in6_addr *ip6;
631
632 if (addr->sa_family == AF_INET)
633 return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr);
634 else {
635 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
636 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 637 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 638 }
639}
640
641static inline int cma_loopback_addr(struct sockaddr *addr)
642{
643 return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr);
644}
645
646static inline int cma_any_addr(struct sockaddr *addr)
647{
648 return cma_zero_addr(addr) || cma_loopback_addr(addr);
649}
650
628e5f6d
SH		 651static inline __be16 cma_port(struct sockaddr *addr)
652{
653 if (addr->sa_family == AF_INET)
654 return ((struct sockaddr_in *) addr)->sin_port;
655 else
656 return ((struct sockaddr_in6 *) addr)->sin6_port;
657}
658
e51060f0
SH		 659static inline int cma_any_port(struct sockaddr *addr)
660{
628e5f6d 661 return !cma_port(addr);
e51060f0
SH		 662}
663
664static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
665 u8 *ip_ver, __u16 *port,
666 union cma_ip_addr **src, union cma_ip_addr **dst)
667{
668 switch (ps) {
669 case RDMA_PS_SDP:
670 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
671 SDP_MAJ_VERSION)
672 return -EINVAL;
673
674 *ip_ver = sdp_get_ip_ver(hdr);
675 *port = ((struct sdp_hh *) hdr)->port;
676 *src = &((struct sdp_hh *) hdr)->src_addr;
677 *dst = &((struct sdp_hh *) hdr)->dst_addr;
678 break;
679 default:
680 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
681 return -EINVAL;
682
683 *ip_ver = cma_get_ip_ver(hdr);
684 *port = ((struct cma_hdr *) hdr)->port;
685 *src = &((struct cma_hdr *) hdr)->src_addr;
686 *dst = &((struct cma_hdr *) hdr)->dst_addr;
687 break;
688 }
689
690 if (*ip_ver != 4 && *ip_ver != 6)
691 return -EINVAL;
692 return 0;
693}
694
695static void cma_save_net_info(struct rdma_addr *addr,
696 struct rdma_addr *listen_addr,
697 u8 ip_ver, __u16 port,
698 union cma_ip_addr *src, union cma_ip_addr *dst)
699{
700 struct sockaddr_in *listen4, *ip4;
701 struct sockaddr_in6 *listen6, *ip6;
702
703 switch (ip_ver) {
704 case 4:
705 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
706 ip4 = (struct sockaddr_in *) &addr->src_addr;
707 ip4->sin_family = listen4->sin_family;
708 ip4->sin_addr.s_addr = dst->ip4.addr;
709 ip4->sin_port = listen4->sin_port;
710
711 ip4 = (struct sockaddr_in *) &addr->dst_addr;
712 ip4->sin_family = listen4->sin_family;
713 ip4->sin_addr.s_addr = src->ip4.addr;
714 ip4->sin_port = port;
715 break;
716 case 6:
717 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
718 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
719 ip6->sin6_family = listen6->sin6_family;
720 ip6->sin6_addr = dst->ip6;
721 ip6->sin6_port = listen6->sin6_port;
722
723 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
724 ip6->sin6_family = listen6->sin6_family;
725 ip6->sin6_addr = src->ip6;
726 ip6->sin6_port = port;
727 break;
728 default:
729 break;
730 }
731}
732
733static inline int cma_user_data_offset(enum rdma_port_space ps)
734{
735 switch (ps) {
736 case RDMA_PS_SDP:
737 return 0;
738 default:
739 return sizeof(struct cma_hdr);
740 }
741}
742
e51060f0
SH		 743static void cma_cancel_route(struct rdma_id_private *id_priv)
744{
07ebafba
TT		 745 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
746 case RDMA_TRANSPORT_IB:
e51060f0
SH		 747 if (id_priv->query)
748 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
749 break;
750 default:
751 break;
752 }
753}
754
e51060f0
SH		 755static void cma_cancel_listens(struct rdma_id_private *id_priv)
756{
757 struct rdma_id_private *dev_id_priv;
758
d02d1f53
SH		 759 /*
760 * Remove from listen_any_list to prevent added devices from spawning
761 * additional listen requests.
762 */
e51060f0
SH		 763 mutex_lock(&lock);
764 list_del(&id_priv->list);
765
766 while (!list_empty(&id_priv->listen_list)) {
767 dev_id_priv = list_entry(id_priv->listen_list.next,
768 struct rdma_id_private, listen_list);
d02d1f53
SH		 769 /* sync with device removal to avoid duplicate destruction */
770 list_del_init(&dev_id_priv->list);
771 list_del(&dev_id_priv->listen_list);
772 mutex_unlock(&lock);
773
774 rdma_destroy_id(&dev_id_priv->id);
775 mutex_lock(&lock);
e51060f0
SH		 776 }
777 mutex_unlock(&lock);
778}
779
780static void cma_cancel_operation(struct rdma_id_private *id_priv,
781 enum cma_state state)
782{
783 switch (state) {
784 case CMA_ADDR_QUERY:
785 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
786 break;
787 case CMA_ROUTE_QUERY:
788 cma_cancel_route(id_priv);
789 break;
790 case CMA_LISTEN:
791 if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&
792 !id_priv->cma_dev)
793 cma_cancel_listens(id_priv);
794 break;
795 default:
796 break;
797 }
798}
799
800static void cma_release_port(struct rdma_id_private *id_priv)
801{
802 struct rdma_bind_list *bind_list = id_priv->bind_list;
803
804 if (!bind_list)
805 return;
806
807 mutex_lock(&lock);
808 hlist_del(&id_priv->node);
809 if (hlist_empty(&bind_list->owners)) {
810 idr_remove(bind_list->ps, bind_list->port);
811 kfree(bind_list);
812 }
813 mutex_unlock(&lock);
814}
815
c8f6a362
SH		 816static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
817{
818 struct cma_multicast *mc;
819
820 while (!list_empty(&id_priv->mc_list)) {
821 mc = container_of(id_priv->mc_list.next,
822 struct cma_multicast, list);
823 list_del(&mc->list);
824 ib_sa_free_multicast(mc->multicast.ib);
825 kfree(mc);
826 }
827}
828
e51060f0
SH		 829void rdma_destroy_id(struct rdma_cm_id *id)
830{
831 struct rdma_id_private *id_priv;
832 enum cma_state state;
833
834 id_priv = container_of(id, struct rdma_id_private, id);
835 state = cma_exch(id_priv, CMA_DESTROYING);
836 cma_cancel_operation(id_priv, state);
837
61a73c70 838 mutex_lock(&lock);
e51060f0 839 if (id_priv->cma_dev) {
61a73c70 840 mutex_unlock(&lock);
07ebafba
TT		 841 switch (rdma_node_get_transport(id->device->node_type)) {
842 case RDMA_TRANSPORT_IB:
3cd96564 843 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 844 ib_destroy_cm_id(id_priv->cm_id.ib);
845 break;
07ebafba
TT		 846 case RDMA_TRANSPORT_IWARP:
847 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
848 iw_destroy_cm_id(id_priv->cm_id.iw);
849 break;
e51060f0
SH		 850 default:
851 break;
852 }
c8f6a362 853 cma_leave_mc_groups(id_priv);
3cd96564 854 mutex_lock(&lock);
e51060f0 855 cma_detach_from_dev(id_priv);
e51060f0 856 }
61a73c70 857 mutex_unlock(&lock);
e51060f0
SH		 858
859 cma_release_port(id_priv);
860 cma_deref_id(id_priv);
861 wait_for_completion(&id_priv->comp);
862
d02d1f53
SH		 863 if (id_priv->internal_id)
864 cma_deref_id(id_priv->id.context);
865
e51060f0
SH		 866 kfree(id_priv->id.route.path_rec);
867 kfree(id_priv);
868}
869EXPORT_SYMBOL(rdma_destroy_id);
870
871static int cma_rep_recv(struct rdma_id_private *id_priv)
872{
873 int ret;
874
5851bb89 875 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 876 if (ret)
877 goto reject;
878
5851bb89 879 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 880 if (ret)
881 goto reject;
882
883 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
884 if (ret)
885 goto reject;
886
887 return 0;
888reject:
c5483388 889 cma_modify_qp_err(id_priv);
e51060f0
SH		 890 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
891 NULL, 0, NULL, 0);
892 return ret;
893}
894
895static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
896{
897 if (id_priv->id.ps == RDMA_PS_SDP &&
898 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
899 SDP_MAJ_VERSION)
900 return -EINVAL;
901
902 return 0;
903}
904
a1b1b61f
SH		 905static void cma_set_rep_event_data(struct rdma_cm_event *event,
906 struct ib_cm_rep_event_param *rep_data,
907 void *private_data)
908{
909 event->param.conn.private_data = private_data;
910 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
911 event->param.conn.responder_resources = rep_data->responder_resources;
912 event->param.conn.initiator_depth = rep_data->initiator_depth;
913 event->param.conn.flow_control = rep_data->flow_control;
914 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
915 event->param.conn.srq = rep_data->srq;
916 event->param.conn.qp_num = rep_data->remote_qpn;
917}
918
e51060f0
SH		 919static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
920{
921 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 922 struct rdma_cm_event event;
923 int ret = 0;
e51060f0 924
8aa08602
SH		 925 if (cma_disable_remove(id_priv, CMA_CONNECT))
926 return 0;
e51060f0 927
a1b1b61f 928 memset(&event, 0, sizeof event);
e51060f0
SH		 929 switch (ib_event->event) {
930 case IB_CM_REQ_ERROR:
931 case IB_CM_REP_ERROR:
a1b1b61f
SH		 932 event.event = RDMA_CM_EVENT_UNREACHABLE;
933 event.status = -ETIMEDOUT;
e51060f0
SH		 934 break;
935 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 936 event.status = cma_verify_rep(id_priv, ib_event->private_data);
937 if (event.status)
938 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 939 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 940 event.status = cma_rep_recv(id_priv);
941 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
942 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 943 } else
a1b1b61f
SH		 944 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
945 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
946 ib_event->private_data);
e51060f0
SH		 947 break;
948 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 949 case IB_CM_USER_ESTABLISHED:
950 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 951 break;
952 case IB_CM_DREQ_ERROR:
a1b1b61f 953 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 954 case IB_CM_DREQ_RECEIVED:
955 case IB_CM_DREP_RECEIVED:
956 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
957 goto out;
a1b1b61f 958 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 959 break;
960 case IB_CM_TIMEWAIT_EXIT:
961 case IB_CM_MRA_RECEIVED:
962 /* ignore event */
963 goto out;
964 case IB_CM_REJ_RECEIVED:
c5483388 965 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 966 event.status = ib_event->param.rej_rcvd.reason;
967 event.event = RDMA_CM_EVENT_REJECTED;
968 event.param.conn.private_data = ib_event->private_data;
969 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 970 break;
971 default:
972 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
973 ib_event->event);
974 goto out;
975 }
976
a1b1b61f 977 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 978 if (ret) {
979 /* Destroy the CM ID by returning a non-zero value. */
980 id_priv->cm_id.ib = NULL;
981 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 982 cma_enable_remove(id_priv);
e51060f0
SH		 983 rdma_destroy_id(&id_priv->id);
984 return ret;
985 }
986out:
8aa08602 987 cma_enable_remove(id_priv);
e51060f0
SH		 988 return ret;
989}
990
628e5f6d
SH		 991static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
992 struct ib_cm_event *ib_event)
e51060f0
SH		 993{
994 struct rdma_id_private *id_priv;
995 struct rdma_cm_id *id;
996 struct rdma_route *rt;
997 union cma_ip_addr *src, *dst;
998 __u16 port;
999 u8 ip_ver;
1000
3f168d2b
KK		 1001 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1002 &ip_ver, &port, &src, &dst))
1003 goto err;
1004
e51060f0
SH		 1005 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1006 listen_id->ps);
1007 if (IS_ERR(id))
3f168d2b
KK		 1008 goto err;
1009
1010 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1011 ip_ver, port, src, dst);
e51060f0
SH		 1012
1013 rt = &id->route;
1014 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1015 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1016 GFP_KERNEL);
e51060f0 1017 if (!rt->path_rec)
3f168d2b 1018 goto destroy_id;
e51060f0 1019
e51060f0
SH		 1020 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1021 if (rt->num_paths == 2)
1022 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1023
1024 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1025 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1026 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
07ebafba 1027 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
e51060f0
SH		 1028
1029 id_priv = container_of(id, struct rdma_id_private, id);
1030 id_priv->state = CMA_CONNECT;
1031 return id_priv;
3f168d2b
KK		 1032
1033destroy_id:
e51060f0 1034 rdma_destroy_id(id);
3f168d2b 1035err:
e51060f0
SH		 1036 return NULL;
1037}
1038
628e5f6d
SH		 1039static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1040 struct ib_cm_event *ib_event)
1041{
1042 struct rdma_id_private *id_priv;
1043 struct rdma_cm_id *id;
1044 union cma_ip_addr *src, *dst;
1045 __u16 port;
1046 u8 ip_ver;
1047 int ret;
1048
1049 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1050 listen_id->ps);
1051 if (IS_ERR(id))
1052 return NULL;
1053
1054
1055 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1056 &ip_ver, &port, &src, &dst))
1057 goto err;
1058
1059 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1060 ip_ver, port, src, dst);
1061
1062 ret = rdma_translate_ip(&id->route.addr.src_addr,
1063 &id->route.addr.dev_addr);
1064 if (ret)
1065 goto err;
1066
1067 id_priv = container_of(id, struct rdma_id_private, id);
1068 id_priv->state = CMA_CONNECT;
1069 return id_priv;
1070err:
1071 rdma_destroy_id(id);
1072 return NULL;
1073}
1074
a1b1b61f
SH		 1075static void cma_set_req_event_data(struct rdma_cm_event *event,
1076 struct ib_cm_req_event_param *req_data,
1077 void *private_data, int offset)
1078{
1079 event->param.conn.private_data = private_data + offset;
1080 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1081 event->param.conn.responder_resources = req_data->responder_resources;
1082 event->param.conn.initiator_depth = req_data->initiator_depth;
1083 event->param.conn.flow_control = req_data->flow_control;
1084 event->param.conn.retry_count = req_data->retry_count;
1085 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1086 event->param.conn.srq = req_data->srq;
1087 event->param.conn.qp_num = req_data->remote_qpn;
1088}
1089
e51060f0
SH		 1090static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1091{
1092 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1093 struct rdma_cm_event event;
e51060f0
SH		 1094 int offset, ret;
1095
1096 listen_id = cm_id->context;
8aa08602
SH		 1097 if (cma_disable_remove(listen_id, CMA_LISTEN))
1098 return -ECONNABORTED;
e51060f0 1099
628e5f6d
SH		 1100 memset(&event, 0, sizeof event);
1101 offset = cma_user_data_offset(listen_id->id.ps);
1102 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
c8f6a362 1103 if (cma_is_ud_ps(listen_id->id.ps)) {
628e5f6d
SH		 1104 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1105 event.param.ud.private_data = ib_event->private_data + offset;
1106 event.param.ud.private_data_len =
1107 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1108 } else {
dcb3f974 1109 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
628e5f6d
SH		 1110 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1111 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1112 ib_event->private_data, offset);
1113 }
e51060f0
SH		 1114 if (!conn_id) {
1115 ret = -ENOMEM;
1116 goto out;
1117 }
1118
1119 atomic_inc(&conn_id->dev_remove);
61a73c70 1120 mutex_lock(&lock);
07ebafba 1121 ret = cma_acquire_dev(conn_id);
61a73c70 1122 mutex_unlock(&lock);
a1a733f6
KK		 1123 if (ret)
1124 goto release_conn_id;
e51060f0
SH		 1125
1126 conn_id->cm_id.ib = cm_id;
1127 cm_id->context = conn_id;
1128 cm_id->cm_handler = cma_ib_handler;
1129
a1b1b61f 1130 ret = conn_id->id.event_handler(&conn_id->id, &event);
45d9478d
VS		 1131 if (!ret) {
1132 cma_enable_remove(conn_id);
a1a733f6 1133 goto out;
45d9478d 1134 }
a1a733f6
KK		 1135
1136 /* Destroy the CM ID by returning a non-zero value. */
1137 conn_id->cm_id.ib = NULL;
1138
1139release_conn_id:
1140 cma_exch(conn_id, CMA_DESTROYING);
8aa08602 1141 cma_enable_remove(conn_id);
a1a733f6
KK		 1142 rdma_destroy_id(&conn_id->id);
1143
e51060f0 1144out:
8aa08602 1145 cma_enable_remove(listen_id);
e51060f0
SH		 1146 return ret;
1147}
1148
1149static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1150{
628e5f6d 1151 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1152}
1153
1154static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1155 struct ib_cm_compare_data *compare)
1156{
1157 struct cma_hdr *cma_data, *cma_mask;
1158 struct sdp_hh *sdp_data, *sdp_mask;
1159 __u32 ip4_addr;
1160 struct in6_addr ip6_addr;
1161
1162 memset(compare, 0, sizeof *compare);
1163 cma_data = (void *) compare->data;
1164 cma_mask = (void *) compare->mask;
1165 sdp_data = (void *) compare->data;
1166 sdp_mask = (void *) compare->mask;
1167
1168 switch (addr->sa_family) {
1169 case AF_INET:
1170 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1171 if (ps == RDMA_PS_SDP) {
1172 sdp_set_ip_ver(sdp_data, 4);
1173 sdp_set_ip_ver(sdp_mask, 0xF);
1174 sdp_data->dst_addr.ip4.addr = ip4_addr;
1175 sdp_mask->dst_addr.ip4.addr = ~0;
1176 } else {
1177 cma_set_ip_ver(cma_data, 4);
1178 cma_set_ip_ver(cma_mask, 0xF);
1179 cma_data->dst_addr.ip4.addr = ip4_addr;
1180 cma_mask->dst_addr.ip4.addr = ~0;
1181 }
1182 break;
1183 case AF_INET6:
1184 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1185 if (ps == RDMA_PS_SDP) {
1186 sdp_set_ip_ver(sdp_data, 6);
1187 sdp_set_ip_ver(sdp_mask, 0xF);
1188 sdp_data->dst_addr.ip6 = ip6_addr;
1189 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1190 sizeof sdp_mask->dst_addr.ip6);
1191 } else {
1192 cma_set_ip_ver(cma_data, 6);
1193 cma_set_ip_ver(cma_mask, 0xF);
1194 cma_data->dst_addr.ip6 = ip6_addr;
1195 memset(&cma_mask->dst_addr.ip6, 0xFF,
1196 sizeof cma_mask->dst_addr.ip6);
1197 }
1198 break;
1199 default:
1200 break;
1201 }
1202}
1203
07ebafba
TT		 1204static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1205{
1206 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1207 struct rdma_cm_event event;
07ebafba
TT		 1208 struct sockaddr_in *sin;
1209 int ret = 0;
1210
be65f086
SH		 1211 if (cma_disable_remove(id_priv, CMA_CONNECT))
1212 return 0;
07ebafba 1213
be65f086 1214 memset(&event, 0, sizeof event);
07ebafba
TT		 1215 switch (iw_event->event) {
1216 case IW_CM_EVENT_CLOSE:
a1b1b61f 1217 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1218 break;
1219 case IW_CM_EVENT_CONNECT_REPLY:
1220 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1221 *sin = iw_event->local_addr;
1222 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1223 *sin = iw_event->remote_addr;
881a045f
SW		 1224 switch (iw_event->status) {
1225 case 0:
a1b1b61f 1226 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1227 break;
1228 case -ECONNRESET:
1229 case -ECONNREFUSED:
1230 event.event = RDMA_CM_EVENT_REJECTED;
1231 break;
1232 case -ETIMEDOUT:
1233 event.event = RDMA_CM_EVENT_UNREACHABLE;
1234 break;
1235 default:
1236 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1237 break;
1238 }
07ebafba
TT		 1239 break;
1240 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1241 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1242 break;
1243 default:
1244 BUG_ON(1);
1245 }
1246
a1b1b61f
SH		 1247 event.status = iw_event->status;
1248 event.param.conn.private_data = iw_event->private_data;
1249 event.param.conn.private_data_len = iw_event->private_data_len;
1250 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1251 if (ret) {
1252 /* Destroy the CM ID by returning a non-zero value. */
1253 id_priv->cm_id.iw = NULL;
1254 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 1255 cma_enable_remove(id_priv);
07ebafba
TT		 1256 rdma_destroy_id(&id_priv->id);
1257 return ret;
1258 }
1259
8aa08602 1260 cma_enable_remove(id_priv);
07ebafba
TT		 1261 return ret;
1262}
1263
1264static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1265 struct iw_cm_event *iw_event)
1266{
1267 struct rdma_cm_id *new_cm_id;
1268 struct rdma_id_private *listen_id, *conn_id;
1269 struct sockaddr_in *sin;
1270 struct net_device *dev = NULL;
a1b1b61f 1271 struct rdma_cm_event event;
07ebafba 1272 int ret;
8d8293cf 1273 struct ib_device_attr attr;
07ebafba
TT		 1274
1275 listen_id = cm_id->context;
8aa08602
SH		 1276 if (cma_disable_remove(listen_id, CMA_LISTEN))
1277 return -ECONNABORTED;
07ebafba
TT		 1278
1279 /* Create a new RDMA id for the new IW CM ID */
1280 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1281 listen_id->id.context,
1282 RDMA_PS_TCP);
1283 if (!new_cm_id) {
1284 ret = -ENOMEM;
1285 goto out;
1286 }
1287 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1288 atomic_inc(&conn_id->dev_remove);
1289 conn_id->state = CMA_CONNECT;
1290
1291 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
1292 if (!dev) {
1293 ret = -EADDRNOTAVAIL;
8aa08602 1294 cma_enable_remove(conn_id);
07ebafba
TT		 1295 rdma_destroy_id(new_cm_id);
1296 goto out;
1297 }
1298 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1299 if (ret) {
8aa08602 1300 cma_enable_remove(conn_id);
07ebafba
TT		 1301 rdma_destroy_id(new_cm_id);
1302 goto out;
1303 }
1304
61a73c70 1305 mutex_lock(&lock);
07ebafba 1306 ret = cma_acquire_dev(conn_id);
61a73c70 1307 mutex_unlock(&lock);
07ebafba 1308 if (ret) {
8aa08602 1309 cma_enable_remove(conn_id);
07ebafba
TT		 1310 rdma_destroy_id(new_cm_id);
1311 goto out;
1312 }
1313
1314 conn_id->cm_id.iw = cm_id;
1315 cm_id->context = conn_id;
1316 cm_id->cm_handler = cma_iw_handler;
1317
1318 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1319 *sin = iw_event->local_addr;
1320 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1321 *sin = iw_event->remote_addr;
1322
8d8293cf
SW		 1323 ret = ib_query_device(conn_id->id.device, &attr);
1324 if (ret) {
1325 cma_enable_remove(conn_id);
1326 rdma_destroy_id(new_cm_id);
1327 goto out;
1328 }
1329
a1b1b61f
SH		 1330 memset(&event, 0, sizeof event);
1331 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1332 event.param.conn.private_data = iw_event->private_data;
1333 event.param.conn.private_data_len = iw_event->private_data_len;
8d8293cf
SW		 1334 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1335 event.param.conn.responder_resources = attr.max_qp_rd_atom;
a1b1b61f 1336 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1337 if (ret) {
1338 /* User wants to destroy the CM ID */
1339 conn_id->cm_id.iw = NULL;
1340 cma_exch(conn_id, CMA_DESTROYING);
8aa08602 1341 cma_enable_remove(conn_id);
07ebafba
TT		 1342 rdma_destroy_id(&conn_id->id);
1343 }
1344
1345out:
1346 if (dev)
1347 dev_put(dev);
8aa08602 1348 cma_enable_remove(listen_id);
07ebafba
TT		 1349 return ret;
1350}
1351
e51060f0
SH		 1352static int cma_ib_listen(struct rdma_id_private *id_priv)
1353{
1354 struct ib_cm_compare_data compare_data;
1355 struct sockaddr *addr;
1356 __be64 svc_id;
1357 int ret;
1358
1359 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1360 id_priv);
1361 if (IS_ERR(id_priv->cm_id.ib))
1362 return PTR_ERR(id_priv->cm_id.ib);
1363
1364 addr = &id_priv->id.route.addr.src_addr;
1365 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1366 if (cma_any_addr(addr))
1367 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1368 else {
1369 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1370 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1371 }
1372
1373 if (ret) {
1374 ib_destroy_cm_id(id_priv->cm_id.ib);
1375 id_priv->cm_id.ib = NULL;
1376 }
1377
1378 return ret;
1379}
1380
07ebafba
TT		 1381static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1382{
1383 int ret;
1384 struct sockaddr_in *sin;
1385
1386 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1387 iw_conn_req_handler,
1388 id_priv);
1389 if (IS_ERR(id_priv->cm_id.iw))
1390 return PTR_ERR(id_priv->cm_id.iw);
1391
1392 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1393 id_priv->cm_id.iw->local_addr = *sin;
1394
1395 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1396
1397 if (ret) {
1398 iw_destroy_cm_id(id_priv->cm_id.iw);
1399 id_priv->cm_id.iw = NULL;
1400 }
1401
1402 return ret;
1403}
1404
e51060f0
SH		 1405static int cma_listen_handler(struct rdma_cm_id *id,
1406 struct rdma_cm_event *event)
1407{
1408 struct rdma_id_private *id_priv = id->context;
1409
1410 id->context = id_priv->id.context;
1411 id->event_handler = id_priv->id.event_handler;
1412 return id_priv->id.event_handler(id, event);
1413}
1414
1415static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1416 struct cma_device *cma_dev)
1417{
1418 struct rdma_id_private *dev_id_priv;
1419 struct rdma_cm_id *id;
1420 int ret;
1421
1422 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1423 if (IS_ERR(id))
1424 return;
1425
1426 dev_id_priv = container_of(id, struct rdma_id_private, id);
1427
1428 dev_id_priv->state = CMA_ADDR_BOUND;
1429 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1430 ip_addr_size(&id_priv->id.route.addr.src_addr));
1431
1432 cma_attach_to_dev(dev_id_priv, cma_dev);
1433 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1434 atomic_inc(&id_priv->refcount);
1435 dev_id_priv->internal_id = 1;
e51060f0
SH		 1436
1437 ret = rdma_listen(id, id_priv->backlog);
1438 if (ret)
d02d1f53
SH		 1439 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1440 "listening on device %s", ret, cma_dev->device->name);
e51060f0
SH		 1441}
1442
1443static void cma_listen_on_all(struct rdma_id_private *id_priv)
1444{
1445 struct cma_device *cma_dev;
1446
1447 mutex_lock(&lock);
1448 list_add_tail(&id_priv->list, &listen_any_list);
1449 list_for_each_entry(cma_dev, &dev_list, list)
1450 cma_listen_on_dev(id_priv, cma_dev);
1451 mutex_unlock(&lock);
1452}
1453
1454static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1455{
1456 struct sockaddr_in addr_in;
1457
1458 memset(&addr_in, 0, sizeof addr_in);
1459 addr_in.sin_family = af;
1460 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1461}
1462
1463int rdma_listen(struct rdma_cm_id *id, int backlog)
1464{
1465 struct rdma_id_private *id_priv;
1466 int ret;
1467
1468 id_priv = container_of(id, struct rdma_id_private, id);
1469 if (id_priv->state == CMA_IDLE) {
1470 ret = cma_bind_any(id, AF_INET);
1471 if (ret)
1472 return ret;
1473 }
1474
1475 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1476 return -EINVAL;
1477
1478 id_priv->backlog = backlog;
1479 if (id->device) {
07ebafba
TT		 1480 switch (rdma_node_get_transport(id->device->node_type)) {
1481 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1482 ret = cma_ib_listen(id_priv);
1483 if (ret)
1484 goto err;
1485 break;
07ebafba
TT		 1486 case RDMA_TRANSPORT_IWARP:
1487 ret = cma_iw_listen(id_priv, backlog);
1488 if (ret)
1489 goto err;
1490 break;
e51060f0
SH		 1491 default:
1492 ret = -ENOSYS;
1493 goto err;
1494 }
1495 } else
1496 cma_listen_on_all(id_priv);
1497
1498 return 0;
1499err:
1500 id_priv->backlog = 0;
1501 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1502 return ret;
1503}
1504EXPORT_SYMBOL(rdma_listen);
1505
a81c994d
SH		 1506void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1507{
1508 struct rdma_id_private *id_priv;
1509
1510 id_priv = container_of(id, struct rdma_id_private, id);
1511 id_priv->tos = (u8) tos;
1512}
1513EXPORT_SYMBOL(rdma_set_service_type);
1514
e51060f0
SH		 1515static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1516 void *context)
1517{
1518 struct cma_work *work = context;
1519 struct rdma_route *route;
1520
1521 route = &work->id->id.route;
1522
1523 if (!status) {
1524 route->num_paths = 1;
1525 *route->path_rec = *path_rec;
1526 } else {
1527 work->old_state = CMA_ROUTE_QUERY;
1528 work->new_state = CMA_ADDR_RESOLVED;
1529 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1530 work->event.status = status;
e51060f0
SH		 1531 }
1532
1533 queue_work(cma_wq, &work->work);
1534}
1535
1536static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1537 struct cma_work *work)
1538{
a81c994d 1539 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1540 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1541 ib_sa_comp_mask comp_mask;
1542 struct sockaddr_in6 *sin6;
e51060f0
SH		 1543
1544 memset(&path_rec, 0, sizeof path_rec);
a81c994d
SH		 1545 ib_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1546 ib_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1547 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1548 path_rec.numb_path = 1;
962063e6 1549 path_rec.reversible = 1;
a81c994d
SH		 1550 path_rec.service_id = cma_get_service_id(id_priv->id.ps, &addr->dst_addr);
1551
1552 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1553 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1554 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1555
1556 if (addr->src_addr.sa_family == AF_INET) {
1557 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1558 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1559 } else {
1560 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1561 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1562 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1563 }
e51060f0 1564
c1a0b23b 1565 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1566 id_priv->id.port_num, &path_rec,
1567 comp_mask, timeout_ms,
1568 GFP_KERNEL, cma_query_handler,
1569 work, &id_priv->query);
e51060f0
SH		 1570
1571 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1572}
1573
c4028958 1574static void cma_work_handler(struct work_struct *_work)
e51060f0 1575{
c4028958 1576 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1577 struct rdma_id_private *id_priv = work->id;
1578 int destroy = 0;
1579
1580 atomic_inc(&id_priv->dev_remove);
1581 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1582 goto out;
1583
1584 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1585 cma_exch(id_priv, CMA_DESTROYING);
1586 destroy = 1;
1587 }
1588out:
8aa08602 1589 cma_enable_remove(id_priv);
e51060f0
SH		 1590 cma_deref_id(id_priv);
1591 if (destroy)
1592 rdma_destroy_id(&id_priv->id);
1593 kfree(work);
1594}
1595
1596static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1597{
1598 struct rdma_route *route = &id_priv->id.route;
1599 struct cma_work *work;
1600 int ret;
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);
e51060f0
SH		 1608 work->old_state = CMA_ROUTE_QUERY;
1609 work->new_state = CMA_ROUTE_RESOLVED;
1610 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1611
1612 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1613 if (!route->path_rec) {
1614 ret = -ENOMEM;
1615 goto err1;
1616 }
1617
1618 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1619 if (ret)
1620 goto err2;
1621
1622 return 0;
1623err2:
1624 kfree(route->path_rec);
1625 route->path_rec = NULL;
1626err1:
1627 kfree(work);
1628 return ret;
1629}
1630
1631int rdma_set_ib_paths(struct rdma_cm_id *id,
1632 struct ib_sa_path_rec *path_rec, int num_paths)
1633{
1634 struct rdma_id_private *id_priv;
1635 int ret;
1636
1637 id_priv = container_of(id, struct rdma_id_private, id);
1638 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1639 return -EINVAL;
1640
1641 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1642 if (!id->route.path_rec) {
1643 ret = -ENOMEM;
1644 goto err;
1645 }
1646
1647 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1648 return 0;
1649err:
1650 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1651 return ret;
1652}
1653EXPORT_SYMBOL(rdma_set_ib_paths);
1654
07ebafba
TT		 1655static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1656{
1657 struct cma_work *work;
1658
1659 work = kzalloc(sizeof *work, GFP_KERNEL);
1660 if (!work)
1661 return -ENOMEM;
1662
1663 work->id = id_priv;
c4028958 1664 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1665 work->old_state = CMA_ROUTE_QUERY;
1666 work->new_state = CMA_ROUTE_RESOLVED;
1667 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1668 queue_work(cma_wq, &work->work);
1669 return 0;
1670}
1671
e51060f0
SH		 1672int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1673{
1674 struct rdma_id_private *id_priv;
1675 int ret;
1676
1677 id_priv = container_of(id, struct rdma_id_private, id);
1678 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1679 return -EINVAL;
1680
1681 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1682 switch (rdma_node_get_transport(id->device->node_type)) {
1683 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1684 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1685 break;
07ebafba
TT		 1686 case RDMA_TRANSPORT_IWARP:
1687 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1688 break;
e51060f0
SH		 1689 default:
1690 ret = -ENOSYS;
1691 break;
1692 }
1693 if (ret)
1694 goto err;
1695
1696 return 0;
1697err:
1698 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1699 cma_deref_id(id_priv);
1700 return ret;
1701}
1702EXPORT_SYMBOL(rdma_resolve_route);
1703
1704static int cma_bind_loopback(struct rdma_id_private *id_priv)
1705{
1706 struct cma_device *cma_dev;
1707 struct ib_port_attr port_attr;
f0ee3404 1708 union ib_gid gid;
e51060f0
SH		 1709 u16 pkey;
1710 int ret;
1711 u8 p;
1712
1713 mutex_lock(&lock);
e82153b5
KK		 1714 if (list_empty(&dev_list)) {
1715 ret = -ENODEV;
1716 goto out;
1717 }
e51060f0
SH		 1718 list_for_each_entry(cma_dev, &dev_list, list)
1719 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1720 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1721 port_attr.state == IB_PORT_ACTIVE)
1722 goto port_found;
1723
e82153b5
KK		 1724 p = 1;
1725 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1726
1727port_found:
f0ee3404 1728 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1729 if (ret)
1730 goto out;
1731
1732 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1733 if (ret)
1734 goto out;
1735
f0ee3404 1736 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1737 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1738 id_priv->id.port_num = p;
1739 cma_attach_to_dev(id_priv, cma_dev);
1740out:
1741 mutex_unlock(&lock);
1742 return ret;
1743}
1744
1745static void addr_handler(int status, struct sockaddr *src_addr,
1746 struct rdma_dev_addr *dev_addr, void *context)
1747{
1748 struct rdma_id_private *id_priv = context;
a1b1b61f 1749 struct rdma_cm_event event;
e51060f0 1750
a1b1b61f 1751 memset(&event, 0, sizeof event);
e51060f0 1752 atomic_inc(&id_priv->dev_remove);
61a73c70
SH		 1753
1754 /*
1755 * Grab mutex to block rdma_destroy_id() from removing the device while
1756 * we're trying to acquire it.
1757 */
1758 mutex_lock(&lock);
1759 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1760 mutex_unlock(&lock);
1761 goto out;
1762 }
1763
1764 if (!status && !id_priv->cma_dev)
e51060f0 1765 status = cma_acquire_dev(id_priv);
61a73c70 1766 mutex_unlock(&lock);
e51060f0
SH		 1767
1768 if (status) {
61a73c70 1769 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1770 goto out;
a1b1b61f
SH		 1771 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1772 event.status = status;
e51060f0 1773 } else {
e51060f0
SH		 1774 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1775 ip_addr_size(src_addr));
a1b1b61f 1776 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1777 }
1778
a1b1b61f 1779 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1780 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 1781 cma_enable_remove(id_priv);
e51060f0
SH		 1782 cma_deref_id(id_priv);
1783 rdma_destroy_id(&id_priv->id);
1784 return;
1785 }
1786out:
8aa08602 1787 cma_enable_remove(id_priv);
e51060f0
SH		 1788 cma_deref_id(id_priv);
1789}
1790
1791static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1792{
1793 struct cma_work *work;
1794 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1795 union ib_gid gid;
e51060f0
SH		 1796 int ret;
1797
1798 work = kzalloc(sizeof *work, GFP_KERNEL);
1799 if (!work)
1800 return -ENOMEM;
1801
1802 if (!id_priv->cma_dev) {
1803 ret = cma_bind_loopback(id_priv);
1804 if (ret)
1805 goto err;
1806 }
1807
f0ee3404
MT		 1808 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1809 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1810
1811 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1812 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1813 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1814 src_in->sin_family = dst_in->sin_family;
1815 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1816 }
1817
1818 work->id = id_priv;
c4028958 1819 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1820 work->old_state = CMA_ADDR_QUERY;
1821 work->new_state = CMA_ADDR_RESOLVED;
1822 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1823 queue_work(cma_wq, &work->work);
1824 return 0;
1825err:
1826 kfree(work);
1827 return ret;
1828}
1829
1830static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1831 struct sockaddr *dst_addr)
1832{
1833 if (src_addr && src_addr->sa_family)
1834 return rdma_bind_addr(id, src_addr);
1835 else
1836 return cma_bind_any(id, dst_addr->sa_family);
1837}
1838
1839int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1840 struct sockaddr *dst_addr, int timeout_ms)
1841{
1842 struct rdma_id_private *id_priv;
1843 int ret;
1844
1845 id_priv = container_of(id, struct rdma_id_private, id);
1846 if (id_priv->state == CMA_IDLE) {
1847 ret = cma_bind_addr(id, src_addr, dst_addr);
1848 if (ret)
1849 return ret;
1850 }
1851
1852 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1853 return -EINVAL;
1854
1855 atomic_inc(&id_priv->refcount);
1856 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1857 if (cma_any_addr(dst_addr))
1858 ret = cma_resolve_loopback(id_priv);
1859 else
7a118df3
SH		 1860 ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr,
1861 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1862 timeout_ms, addr_handler, id_priv);
1863 if (ret)
1864 goto err;
1865
1866 return 0;
1867err:
1868 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1869 cma_deref_id(id_priv);
1870 return ret;
1871}
1872EXPORT_SYMBOL(rdma_resolve_addr);
1873
1874static void cma_bind_port(struct rdma_bind_list *bind_list,
1875 struct rdma_id_private *id_priv)
1876{
1877 struct sockaddr_in *sin;
1878
1879 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1880 sin->sin_port = htons(bind_list->port);
1881 id_priv->bind_list = bind_list;
1882 hlist_add_head(&id_priv->node, &bind_list->owners);
1883}
1884
1885static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1886 unsigned short snum)
1887{
1888 struct rdma_bind_list *bind_list;
aedec080 1889 int port, ret;
e51060f0 1890
cb164b8c 1891 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 1892 if (!bind_list)
1893 return -ENOMEM;
1894
aedec080
SH		 1895 do {
1896 ret = idr_get_new_above(ps, bind_list, snum, &port);
1897 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1898
1899 if (ret)
1900 goto err1;
1901
1902 if (port != snum) {
1903 ret = -EADDRNOTAVAIL;
1904 goto err2;
1905 }
1906
1907 bind_list->ps = ps;
1908 bind_list->port = (unsigned short) port;
1909 cma_bind_port(bind_list, id_priv);
1910 return 0;
1911err2:
1912 idr_remove(ps, port);
1913err1:
1914 kfree(bind_list);
1915 return ret;
1916}
e51060f0 1917
aedec080
SH		 1918static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1919{
1920 struct rdma_bind_list *bind_list;
227b60f5 1921 int port, ret, low, high;
aedec080
SH		 1922
1923 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1924 if (!bind_list)
1925 return -ENOMEM;
1926
1927retry:
227b60f5 1928 /* FIXME: add proper port randomization per like inet_csk_get_port */
e51060f0 1929 do {
aedec080 1930 ret = idr_get_new_above(ps, bind_list, next_port, &port);
e51060f0
SH		 1931 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1932
1933 if (ret)
aedec080 1934 goto err1;
e51060f0 1935
227b60f5
SH		 1936 inet_get_local_port_range(&low, &high);
1937 if (port > high) {
1938 if (next_port != low) {
aedec080 1939 idr_remove(ps, port);
227b60f5 1940 next_port = low;
aedec080
SH		 1941 goto retry;
1942 }
e51060f0 1943 ret = -EADDRNOTAVAIL;
aedec080 1944 goto err2;
e51060f0
SH		 1945 }
1946
227b60f5
SH		 1947 if (port == high)
1948 next_port = low;
aedec080
SH		 1949 else
1950 next_port = port + 1;
1951
e51060f0
SH		 1952 bind_list->ps = ps;
1953 bind_list->port = (unsigned short) port;
1954 cma_bind_port(bind_list, id_priv);
1955 return 0;
aedec080
SH		 1956err2:
1957 idr_remove(ps, port);
1958err1:
e51060f0
SH		 1959 kfree(bind_list);
1960 return ret;
1961}
1962
1963static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1964{
1965 struct rdma_id_private *cur_id;
1966 struct sockaddr_in *sin, *cur_sin;
1967 struct rdma_bind_list *bind_list;
1968 struct hlist_node *node;
1969 unsigned short snum;
1970
1971 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1972 snum = ntohs(sin->sin_port);
1973 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1974 return -EACCES;
1975
1976 bind_list = idr_find(ps, snum);
1977 if (!bind_list)
1978 return cma_alloc_port(ps, id_priv, snum);
1979
1980 /*
1981 * We don't support binding to any address if anyone is bound to
1982 * a specific address on the same port.
1983 */
1984 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1985 return -EADDRNOTAVAIL;
1986
1987 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
1988 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
1989 return -EADDRNOTAVAIL;
3cd96564 1990
e51060f0
SH		 1991 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
1992 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
1993 return -EADDRINUSE;
1994 }
1995
1996 cma_bind_port(bind_list, id_priv);
1997 return 0;
1998}
1999
2000static int cma_get_port(struct rdma_id_private *id_priv)
2001{
2002 struct idr *ps;
2003 int ret;
2004
2005 switch (id_priv->id.ps) {
2006 case RDMA_PS_SDP:
2007 ps = &sdp_ps;
2008 break;
2009 case RDMA_PS_TCP:
2010 ps = &tcp_ps;
2011 break;
628e5f6d
SH		 2012 case RDMA_PS_UDP:
2013 ps = &udp_ps;
2014 break;
c8f6a362
SH		 2015 case RDMA_PS_IPOIB:
2016 ps = &ipoib_ps;
2017 break;
e51060f0
SH		 2018 default:
2019 return -EPROTONOSUPPORT;
2020 }
2021
2022 mutex_lock(&lock);
2023 if (cma_any_port(&id_priv->id.route.addr.src_addr))
aedec080 2024 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2025 else
2026 ret = cma_use_port(ps, id_priv);
2027 mutex_unlock(&lock);
2028
2029 return ret;
2030}
2031
2032int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2033{
2034 struct rdma_id_private *id_priv;
2035 int ret;
2036
2037 if (addr->sa_family != AF_INET)
2038 return -EAFNOSUPPORT;
2039
2040 id_priv = container_of(id, struct rdma_id_private, id);
2041 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2042 return -EINVAL;
2043
2044 if (!cma_any_addr(addr)) {
2045 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2046 if (ret)
255d0c14
KK		 2047 goto err1;
2048
2049 mutex_lock(&lock);
2050 ret = cma_acquire_dev(id_priv);
2051 mutex_unlock(&lock);
2052 if (ret)
2053 goto err1;
e51060f0
SH		 2054 }
2055
2056 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2057 ret = cma_get_port(id_priv);
2058 if (ret)
255d0c14 2059 goto err2;
e51060f0
SH		 2060
2061 return 0;
255d0c14
KK		 2062err2:
2063 if (!cma_any_addr(addr)) {
2064 mutex_lock(&lock);
2065 cma_detach_from_dev(id_priv);
2066 mutex_unlock(&lock);
2067 }
2068err1:
e51060f0
SH		 2069 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2070 return ret;
2071}
2072EXPORT_SYMBOL(rdma_bind_addr);
2073
2074static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2075 struct rdma_route *route)
2076{
2077 struct sockaddr_in *src4, *dst4;
2078 struct cma_hdr *cma_hdr;
2079 struct sdp_hh *sdp_hdr;
2080
2081 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2082 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2083
2084 switch (ps) {
2085 case RDMA_PS_SDP:
2086 sdp_hdr = hdr;
2087 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2088 return -EINVAL;
2089 sdp_set_ip_ver(sdp_hdr, 4);
2090 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2091 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2092 sdp_hdr->port = src4->sin_port;
2093 break;
2094 default:
2095 cma_hdr = hdr;
2096 cma_hdr->cma_version = CMA_VERSION;
2097 cma_set_ip_ver(cma_hdr, 4);
2098 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2099 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2100 cma_hdr->port = src4->sin_port;
2101 break;
2102 }
2103 return 0;
2104}
2105
628e5f6d
SH		 2106static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2107 struct ib_cm_event *ib_event)
2108{
2109 struct rdma_id_private *id_priv = cm_id->context;
2110 struct rdma_cm_event event;
2111 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2112 int ret = 0;
2113
8aa08602
SH		 2114 if (cma_disable_remove(id_priv, CMA_CONNECT))
2115 return 0;
628e5f6d 2116
8aa08602 2117 memset(&event, 0, sizeof event);
628e5f6d
SH		 2118 switch (ib_event->event) {
2119 case IB_CM_SIDR_REQ_ERROR:
2120 event.event = RDMA_CM_EVENT_UNREACHABLE;
2121 event.status = -ETIMEDOUT;
2122 break;
2123 case IB_CM_SIDR_REP_RECEIVED:
2124 event.param.ud.private_data = ib_event->private_data;
2125 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2126 if (rep->status != IB_SIDR_SUCCESS) {
2127 event.event = RDMA_CM_EVENT_UNREACHABLE;
2128 event.status = ib_event->param.sidr_rep_rcvd.status;
2129 break;
2130 }
c8f6a362 2131 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2132 event.event = RDMA_CM_EVENT_UNREACHABLE;
2133 event.status = -EINVAL;
2134 break;
2135 }
2136 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2137 id_priv->id.route.path_rec,
2138 &event.param.ud.ah_attr);
2139 event.param.ud.qp_num = rep->qpn;
2140 event.param.ud.qkey = rep->qkey;
2141 event.event = RDMA_CM_EVENT_ESTABLISHED;
2142 event.status = 0;
2143 break;
2144 default:
2145 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
2146 ib_event->event);
2147 goto out;
2148 }
2149
2150 ret = id_priv->id.event_handler(&id_priv->id, &event);
2151 if (ret) {
2152 /* Destroy the CM ID by returning a non-zero value. */
2153 id_priv->cm_id.ib = NULL;
2154 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 2155 cma_enable_remove(id_priv);
628e5f6d
SH		 2156 rdma_destroy_id(&id_priv->id);
2157 return ret;
2158 }
2159out:
8aa08602 2160 cma_enable_remove(id_priv);
628e5f6d
SH		 2161 return ret;
2162}
2163
2164static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2165 struct rdma_conn_param *conn_param)
2166{
2167 struct ib_cm_sidr_req_param req;
2168 struct rdma_route *route;
2169 int ret;
2170
2171 req.private_data_len = sizeof(struct cma_hdr) +
2172 conn_param->private_data_len;
2173 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2174 if (!req.private_data)
2175 return -ENOMEM;
2176
2177 if (conn_param->private_data && conn_param->private_data_len)
2178 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2179 conn_param->private_data, conn_param->private_data_len);
2180
2181 route = &id_priv->id.route;
2182 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2183 if (ret)
2184 goto out;
2185
2186 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2187 cma_sidr_rep_handler, id_priv);
2188 if (IS_ERR(id_priv->cm_id.ib)) {
2189 ret = PTR_ERR(id_priv->cm_id.ib);
2190 goto out;
2191 }
2192
2193 req.path = route->path_rec;
2194 req.service_id = cma_get_service_id(id_priv->id.ps,
2195 &route->addr.dst_addr);
2196 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2197 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2198
2199 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2200 if (ret) {
2201 ib_destroy_cm_id(id_priv->cm_id.ib);
2202 id_priv->cm_id.ib = NULL;
2203 }
2204out:
2205 kfree(req.private_data);
2206 return ret;
2207}
2208
e51060f0
SH		 2209static int cma_connect_ib(struct rdma_id_private *id_priv,
2210 struct rdma_conn_param *conn_param)
2211{
2212 struct ib_cm_req_param req;
2213 struct rdma_route *route;
2214 void *private_data;
2215 int offset, ret;
2216
2217 memset(&req, 0, sizeof req);
2218 offset = cma_user_data_offset(id_priv->id.ps);
2219 req.private_data_len = offset + conn_param->private_data_len;
2220 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2221 if (!private_data)
2222 return -ENOMEM;
2223
2224 if (conn_param->private_data && conn_param->private_data_len)
2225 memcpy(private_data + offset, conn_param->private_data,
2226 conn_param->private_data_len);
2227
2228 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2229 id_priv);
2230 if (IS_ERR(id_priv->cm_id.ib)) {
2231 ret = PTR_ERR(id_priv->cm_id.ib);
2232 goto out;
2233 }
2234
2235 route = &id_priv->id.route;
2236 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2237 if (ret)
2238 goto out;
2239 req.private_data = private_data;
2240
2241 req.primary_path = &route->path_rec[0];
2242 if (route->num_paths == 2)
2243 req.alternate_path = &route->path_rec[1];
2244
2245 req.service_id = cma_get_service_id(id_priv->id.ps,
2246 &route->addr.dst_addr);
2247 req.qp_num = id_priv->qp_num;
9b2e9c0c 2248 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2249 req.starting_psn = id_priv->seq_num;
2250 req.responder_resources = conn_param->responder_resources;
2251 req.initiator_depth = conn_param->initiator_depth;
2252 req.flow_control = conn_param->flow_control;
2253 req.retry_count = conn_param->retry_count;
2254 req.rnr_retry_count = conn_param->rnr_retry_count;
2255 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2256 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2257 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2258 req.srq = id_priv->srq ? 1 : 0;
2259
2260 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2261out:
675a027c
KK		 2262 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2263 ib_destroy_cm_id(id_priv->cm_id.ib);
2264 id_priv->cm_id.ib = NULL;
2265 }
2266
e51060f0
SH		 2267 kfree(private_data);
2268 return ret;
2269}
2270
07ebafba
TT		 2271static int cma_connect_iw(struct rdma_id_private *id_priv,
2272 struct rdma_conn_param *conn_param)
2273{
2274 struct iw_cm_id *cm_id;
2275 struct sockaddr_in* sin;
2276 int ret;
2277 struct iw_cm_conn_param iw_param;
2278
2279 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2280 if (IS_ERR(cm_id)) {
2281 ret = PTR_ERR(cm_id);
2282 goto out;
2283 }
2284
2285 id_priv->cm_id.iw = cm_id;
2286
2287 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2288 cm_id->local_addr = *sin;
2289
2290 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2291 cm_id->remote_addr = *sin;
2292
5851bb89 2293 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2294 if (ret)
2295 goto out;
07ebafba
TT		 2296
2297 iw_param.ord = conn_param->initiator_depth;
2298 iw_param.ird = conn_param->responder_resources;
2299 iw_param.private_data = conn_param->private_data;
2300 iw_param.private_data_len = conn_param->private_data_len;
2301 if (id_priv->id.qp)
2302 iw_param.qpn = id_priv->qp_num;
2303 else
2304 iw_param.qpn = conn_param->qp_num;
2305 ret = iw_cm_connect(cm_id, &iw_param);
2306out:
675a027c
KK		 2307 if (ret && !IS_ERR(cm_id)) {
2308 iw_destroy_cm_id(cm_id);
2309 id_priv->cm_id.iw = NULL;
2310 }
07ebafba
TT		 2311 return ret;
2312}
2313
e51060f0
SH		 2314int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2315{
2316 struct rdma_id_private *id_priv;
2317 int ret;
2318
2319 id_priv = container_of(id, struct rdma_id_private, id);
2320 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2321 return -EINVAL;
2322
2323 if (!id->qp) {
2324 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2325 id_priv->srq = conn_param->srq;
2326 }
2327
07ebafba
TT		 2328 switch (rdma_node_get_transport(id->device->node_type)) {
2329 case RDMA_TRANSPORT_IB:
c8f6a362 2330 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2331 ret = cma_resolve_ib_udp(id_priv, conn_param);
2332 else
2333 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2334 break;
07ebafba
TT		 2335 case RDMA_TRANSPORT_IWARP:
2336 ret = cma_connect_iw(id_priv, conn_param);
2337 break;
e51060f0
SH		 2338 default:
2339 ret = -ENOSYS;
2340 break;
2341 }
2342 if (ret)
2343 goto err;
2344
2345 return 0;
2346err:
2347 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2348 return ret;
2349}
2350EXPORT_SYMBOL(rdma_connect);
2351
2352static int cma_accept_ib(struct rdma_id_private *id_priv,
2353 struct rdma_conn_param *conn_param)
2354{
2355 struct ib_cm_rep_param rep;
5851bb89 2356 int ret;
0fe313b0 2357
5851bb89
SH		 2358 ret = cma_modify_qp_rtr(id_priv, conn_param);
2359 if (ret)
2360 goto out;
0fe313b0 2361
5851bb89
SH		 2362 ret = cma_modify_qp_rts(id_priv, conn_param);
2363 if (ret)
2364 goto out;
e51060f0
SH		 2365
2366 memset(&rep, 0, sizeof rep);
2367 rep.qp_num = id_priv->qp_num;
2368 rep.starting_psn = id_priv->seq_num;
2369 rep.private_data = conn_param->private_data;
2370 rep.private_data_len = conn_param->private_data_len;
2371 rep.responder_resources = conn_param->responder_resources;
2372 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2373 rep.failover_accepted = 0;
2374 rep.flow_control = conn_param->flow_control;
2375 rep.rnr_retry_count = conn_param->rnr_retry_count;
2376 rep.srq = id_priv->srq ? 1 : 0;
2377
0fe313b0
SH		 2378 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2379out:
2380 return ret;
e51060f0
SH		 2381}
2382
07ebafba
TT		 2383static int cma_accept_iw(struct rdma_id_private *id_priv,
2384 struct rdma_conn_param *conn_param)
2385{
2386 struct iw_cm_conn_param iw_param;
2387 int ret;
2388
5851bb89 2389 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2390 if (ret)
2391 return ret;
2392
2393 iw_param.ord = conn_param->initiator_depth;
2394 iw_param.ird = conn_param->responder_resources;
2395 iw_param.private_data = conn_param->private_data;
2396 iw_param.private_data_len = conn_param->private_data_len;
2397 if (id_priv->id.qp) {
2398 iw_param.qpn = id_priv->qp_num;
2399 } else
2400 iw_param.qpn = conn_param->qp_num;
2401
2402 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2403}
2404
628e5f6d
SH		 2405static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2406 enum ib_cm_sidr_status status,
2407 const void *private_data, int private_data_len)
2408{
2409 struct ib_cm_sidr_rep_param rep;
2410
2411 memset(&rep, 0, sizeof rep);
2412 rep.status = status;
2413 if (status == IB_SIDR_SUCCESS) {
2414 rep.qp_num = id_priv->qp_num;
c8f6a362 2415 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2416 }
2417 rep.private_data = private_data;
2418 rep.private_data_len = private_data_len;
2419
2420 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2421}
2422
e51060f0
SH		 2423int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2424{
2425 struct rdma_id_private *id_priv;
2426 int ret;
2427
2428 id_priv = container_of(id, struct rdma_id_private, id);
2429 if (!cma_comp(id_priv, CMA_CONNECT))
2430 return -EINVAL;
2431
2432 if (!id->qp && conn_param) {
2433 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2434 id_priv->srq = conn_param->srq;
2435 }
2436
07ebafba
TT		 2437 switch (rdma_node_get_transport(id->device->node_type)) {
2438 case RDMA_TRANSPORT_IB:
c8f6a362 2439 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2440 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2441 conn_param->private_data,
2442 conn_param->private_data_len);
2443 else if (conn_param)
e51060f0
SH		 2444 ret = cma_accept_ib(id_priv, conn_param);
2445 else
2446 ret = cma_rep_recv(id_priv);
2447 break;
07ebafba
TT		 2448 case RDMA_TRANSPORT_IWARP:
2449 ret = cma_accept_iw(id_priv, conn_param);
2450 break;
e51060f0
SH		 2451 default:
2452 ret = -ENOSYS;
2453 break;
2454 }
2455
2456 if (ret)
2457 goto reject;
2458
2459 return 0;
2460reject:
c5483388 2461 cma_modify_qp_err(id_priv);
e51060f0
SH		 2462 rdma_reject(id, NULL, 0);
2463 return ret;
2464}
2465EXPORT_SYMBOL(rdma_accept);
2466
0fe313b0
SH		 2467int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2468{
2469 struct rdma_id_private *id_priv;
2470 int ret;
2471
2472 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2473 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2474 return -EINVAL;
2475
2476 switch (id->device->node_type) {
2477 case RDMA_NODE_IB_CA:
2478 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2479 break;
2480 default:
2481 ret = 0;
2482 break;
2483 }
2484 return ret;
2485}
2486EXPORT_SYMBOL(rdma_notify);
2487
e51060f0
SH		 2488int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2489 u8 private_data_len)
2490{
2491 struct rdma_id_private *id_priv;
2492 int ret;
2493
2494 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2495 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2496 return -EINVAL;
2497
07ebafba
TT		 2498 switch (rdma_node_get_transport(id->device->node_type)) {
2499 case RDMA_TRANSPORT_IB:
c8f6a362 2500 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2501 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2502 private_data, private_data_len);
2503 else
2504 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2505 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2506 0, private_data, private_data_len);
e51060f0 2507 break;
07ebafba
TT		 2508 case RDMA_TRANSPORT_IWARP:
2509 ret = iw_cm_reject(id_priv->cm_id.iw,
2510 private_data, private_data_len);
2511 break;
e51060f0
SH		 2512 default:
2513 ret = -ENOSYS;
2514 break;
2515 }
2516 return ret;
2517}
2518EXPORT_SYMBOL(rdma_reject);
2519
2520int rdma_disconnect(struct rdma_cm_id *id)
2521{
2522 struct rdma_id_private *id_priv;
2523 int ret;
2524
2525 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2526 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2527 return -EINVAL;
2528
07ebafba
TT		 2529 switch (rdma_node_get_transport(id->device->node_type)) {
2530 case RDMA_TRANSPORT_IB:
c5483388 2531 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2532 if (ret)
2533 goto out;
e51060f0
SH		 2534 /* Initiate or respond to a disconnect. */
2535 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2536 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2537 break;
07ebafba
TT		 2538 case RDMA_TRANSPORT_IWARP:
2539 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2540 break;
e51060f0 2541 default:
07ebafba 2542 ret = -EINVAL;
e51060f0
SH		 2543 break;
2544 }
2545out:
2546 return ret;
2547}
2548EXPORT_SYMBOL(rdma_disconnect);
2549
c8f6a362
SH		 2550static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2551{
2552 struct rdma_id_private *id_priv;
2553 struct cma_multicast *mc = multicast->context;
2554 struct rdma_cm_event event;
2555 int ret;
2556
2557 id_priv = mc->id_priv;
8aa08602
SH		 2558 if (cma_disable_remove(id_priv, CMA_ADDR_BOUND) &&
2559 cma_disable_remove(id_priv, CMA_ADDR_RESOLVED))
2560 return 0;
c8f6a362 2561
c5483388 2562 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2563 if (!status && id_priv->id.qp)
2564 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2565 multicast->rec.mlid);
c5483388 2566 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2567
2568 memset(&event, 0, sizeof event);
2569 event.status = status;
2570 event.param.ud.private_data = mc->context;
2571 if (!status) {
2572 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2573 ib_init_ah_from_mcmember(id_priv->id.device,
2574 id_priv->id.port_num, &multicast->rec,
2575 &event.param.ud.ah_attr);
2576 event.param.ud.qp_num = 0xFFFFFF;
2577 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2578 } else
2579 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2580
2581 ret = id_priv->id.event_handler(&id_priv->id, &event);
2582 if (ret) {
2583 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 2584 cma_enable_remove(id_priv);
c8f6a362
SH		 2585 rdma_destroy_id(&id_priv->id);
2586 return 0;
2587 }
8aa08602
SH		 2588
2589 cma_enable_remove(id_priv);
c8f6a362
SH		 2590 return 0;
2591}
2592
2593static void cma_set_mgid(struct rdma_id_private *id_priv,
2594 struct sockaddr *addr, union ib_gid *mgid)
2595{
2596 unsigned char mc_map[MAX_ADDR_LEN];
2597 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2598 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2599 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2600
2601 if (cma_any_addr(addr)) {
2602 memset(mgid, 0, sizeof *mgid);
2603 } else if ((addr->sa_family == AF_INET6) &&
2604 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) ==
2605 0xFF10A01B)) {
2606 /* IPv6 address is an SA assigned MGID. */
2607 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2608 } else {
a9e527e3 2609 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2610 if (id_priv->id.ps == RDMA_PS_UDP)
2611 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2612 *mgid = *(union ib_gid *) (mc_map + 4);
2613 }
2614}
2615
2616static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2617 struct cma_multicast *mc)
2618{
2619 struct ib_sa_mcmember_rec rec;
2620 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2621 ib_sa_comp_mask comp_mask;
2622 int ret;
2623
2624 ib_addr_get_mgid(dev_addr, &rec.mgid);
2625 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2626 &rec.mgid, &rec);
2627 if (ret)
2628 return ret;
2629
2630 cma_set_mgid(id_priv, &mc->addr, &rec.mgid);
2631 if (id_priv->id.ps == RDMA_PS_UDP)
2632 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2633 ib_addr_get_sgid(dev_addr, &rec.port_gid);
2634 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2635 rec.join_state = 1;
2636
2637 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2638 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2639 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2640 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2641 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2642
2643 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2644 id_priv->id.port_num, &rec,
2645 comp_mask, GFP_KERNEL,
2646 cma_ib_mc_handler, mc);
2647 if (IS_ERR(mc->multicast.ib))
2648 return PTR_ERR(mc->multicast.ib);
2649
2650 return 0;
2651}
2652
2653int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2654 void *context)
2655{
2656 struct rdma_id_private *id_priv;
2657 struct cma_multicast *mc;
2658 int ret;
2659
2660 id_priv = container_of(id, struct rdma_id_private, id);
2661 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2662 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2663 return -EINVAL;
2664
2665 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2666 if (!mc)
2667 return -ENOMEM;
2668
2669 memcpy(&mc->addr, addr, ip_addr_size(addr));
2670 mc->context = context;
2671 mc->id_priv = id_priv;
2672
2673 spin_lock(&id_priv->lock);
2674 list_add(&mc->list, &id_priv->mc_list);
2675 spin_unlock(&id_priv->lock);
2676
2677 switch (rdma_node_get_transport(id->device->node_type)) {
2678 case RDMA_TRANSPORT_IB:
2679 ret = cma_join_ib_multicast(id_priv, mc);
2680 break;
2681 default:
2682 ret = -ENOSYS;
2683 break;
2684 }
2685
2686 if (ret) {
2687 spin_lock_irq(&id_priv->lock);
2688 list_del(&mc->list);
2689 spin_unlock_irq(&id_priv->lock);
2690 kfree(mc);
2691 }
2692 return ret;
2693}
2694EXPORT_SYMBOL(rdma_join_multicast);
2695
2696void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2697{
2698 struct rdma_id_private *id_priv;
2699 struct cma_multicast *mc;
2700
2701 id_priv = container_of(id, struct rdma_id_private, id);
2702 spin_lock_irq(&id_priv->lock);
2703 list_for_each_entry(mc, &id_priv->mc_list, list) {
2704 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2705 list_del(&mc->list);
2706 spin_unlock_irq(&id_priv->lock);
2707
2708 if (id->qp)
2709 ib_detach_mcast(id->qp,
2710 &mc->multicast.ib->rec.mgid,
2711 mc->multicast.ib->rec.mlid);
2712 ib_sa_free_multicast(mc->multicast.ib);
2713 kfree(mc);
2714 return;
2715 }
2716 }
2717 spin_unlock_irq(&id_priv->lock);
2718}
2719EXPORT_SYMBOL(rdma_leave_multicast);
2720
e51060f0
SH		 2721static void cma_add_one(struct ib_device *device)
2722{
2723 struct cma_device *cma_dev;
2724 struct rdma_id_private *id_priv;
2725
2726 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2727 if (!cma_dev)
2728 return;
2729
2730 cma_dev->device = device;
e51060f0
SH		 2731
2732 init_completion(&cma_dev->comp);
2733 atomic_set(&cma_dev->refcount, 1);
2734 INIT_LIST_HEAD(&cma_dev->id_list);
2735 ib_set_client_data(device, &cma_client, cma_dev);
2736
2737 mutex_lock(&lock);
2738 list_add_tail(&cma_dev->list, &dev_list);
2739 list_for_each_entry(id_priv, &listen_any_list, list)
2740 cma_listen_on_dev(id_priv, cma_dev);
2741 mutex_unlock(&lock);
e51060f0
SH		 2742}
2743
2744static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2745{
a1b1b61f 2746 struct rdma_cm_event event;
e51060f0
SH		 2747 enum cma_state state;
2748
2749 /* Record that we want to remove the device */
2750 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2751 if (state == CMA_DESTROYING)
2752 return 0;
2753
2754 cma_cancel_operation(id_priv, state);
2755 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2756
2757 /* Check for destruction from another callback. */
2758 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2759 return 0;
2760
a1b1b61f
SH		 2761 memset(&event, 0, sizeof event);
2762 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
2763 return id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 2764}
2765
2766static void cma_process_remove(struct cma_device *cma_dev)
2767{
e51060f0
SH		 2768 struct rdma_id_private *id_priv;
2769 int ret;
2770
e51060f0
SH		 2771 mutex_lock(&lock);
2772 while (!list_empty(&cma_dev->id_list)) {
2773 id_priv = list_entry(cma_dev->id_list.next,
2774 struct rdma_id_private, list);
2775
d02d1f53 2776 list_del(&id_priv->listen_list);
94de178a 2777 list_del_init(&id_priv->list);
e51060f0
SH		 2778 atomic_inc(&id_priv->refcount);
2779 mutex_unlock(&lock);
2780
d02d1f53 2781 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 2782 cma_deref_id(id_priv);
2783 if (ret)
2784 rdma_destroy_id(&id_priv->id);
2785
2786 mutex_lock(&lock);
2787 }
2788 mutex_unlock(&lock);
2789
2790 cma_deref_dev(cma_dev);
2791 wait_for_completion(&cma_dev->comp);
2792}
2793
2794static void cma_remove_one(struct ib_device *device)
2795{
2796 struct cma_device *cma_dev;
2797
2798 cma_dev = ib_get_client_data(device, &cma_client);
2799 if (!cma_dev)
2800 return;
2801
2802 mutex_lock(&lock);
2803 list_del(&cma_dev->list);
2804 mutex_unlock(&lock);
2805
2806 cma_process_remove(cma_dev);
2807 kfree(cma_dev);
2808}
2809
2810static int cma_init(void)
2811{
a25de534 2812 int ret, low, high, remaining;
e51060f0 2813
aedec080 2814 get_random_bytes(&next_port, sizeof next_port);
227b60f5 2815 inet_get_local_port_range(&low, &high);
a25de534
AA		 2816 remaining = (high - low) + 1;
2817 next_port = ((unsigned int) next_port % remaining) + low;
227b60f5 2818
c7f743a6 2819 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 2820 if (!cma_wq)
2821 return -ENOMEM;
2822
c1a0b23b 2823 ib_sa_register_client(&sa_client);
7a118df3 2824 rdma_addr_register_client(&addr_client);
c1a0b23b 2825
e51060f0
SH		 2826 ret = ib_register_client(&cma_client);
2827 if (ret)
2828 goto err;
2829 return 0;
2830
2831err:
7a118df3 2832 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2833 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2834 destroy_workqueue(cma_wq);
2835 return ret;
2836}
2837
2838static void cma_cleanup(void)
2839{
2840 ib_unregister_client(&cma_client);
7a118df3 2841 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2842 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2843 destroy_workqueue(cma_wq);
2844 idr_destroy(&sdp_ps);
2845 idr_destroy(&tcp_ps);
628e5f6d 2846 idr_destroy(&udp_ps);
c8f6a362 2847 idr_destroy(&ipoib_ps);
e51060f0
SH		 2848}
2849
2850module_init(cma_init);
2851module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)