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RDMA/addr: Add support for translating IPv6 addresses
[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 *
a9474917
SH		 7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
e51060f0 12 *
a9474917
SH		 13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
e51060f0 16 *
a9474917
SH		 17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
e51060f0 20 *
a9474917
SH		 21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
e51060f0 25 *
a9474917
SH		 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
e51060f0
SH		 34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/idr.h>
07ebafba 42#include <linux/inetdevice.h>
e51060f0
SH		 43
44#include <net/tcp.h>
45
46#include <rdma/rdma_cm.h>
47#include <rdma/rdma_cm_ib.h>
48#include <rdma/ib_cache.h>
49#include <rdma/ib_cm.h>
50#include <rdma/ib_sa.h>
07ebafba 51#include <rdma/iw_cm.h>
e51060f0
SH		 52
53MODULE_AUTHOR("Sean Hefty");
54MODULE_DESCRIPTION("Generic RDMA CM Agent");
55MODULE_LICENSE("Dual BSD/GPL");
56
57#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 58#define CMA_MAX_CM_RETRIES 15
dcb3f974 59#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
e51060f0
SH		 60
61static void cma_add_one(struct ib_device *device);
62static void cma_remove_one(struct ib_device *device);
63
64static struct ib_client cma_client = {
65 .name = "cma",
66 .add = cma_add_one,
67 .remove = cma_remove_one
68};
69
c1a0b23b 70static struct ib_sa_client sa_client;
7a118df3 71static struct rdma_addr_client addr_client;
e51060f0
SH		 72static LIST_HEAD(dev_list);
73static LIST_HEAD(listen_any_list);
74static DEFINE_MUTEX(lock);
75static struct workqueue_struct *cma_wq;
76static DEFINE_IDR(sdp_ps);
77static DEFINE_IDR(tcp_ps);
628e5f6d 78static DEFINE_IDR(udp_ps);
c8f6a362 79static DEFINE_IDR(ipoib_ps);
aedec080 80static int next_port;
e51060f0
SH		 81
82struct cma_device {
83 struct list_head list;
84 struct ib_device *device;
e51060f0
SH		 85 struct completion comp;
86 atomic_t refcount;
87 struct list_head id_list;
88};
89
90enum cma_state {
91 CMA_IDLE,
92 CMA_ADDR_QUERY,
93 CMA_ADDR_RESOLVED,
94 CMA_ROUTE_QUERY,
95 CMA_ROUTE_RESOLVED,
96 CMA_CONNECT,
97 CMA_DISCONNECT,
98 CMA_ADDR_BOUND,
99 CMA_LISTEN,
100 CMA_DEVICE_REMOVAL,
101 CMA_DESTROYING
102};
103
104struct rdma_bind_list {
105 struct idr *ps;
106 struct hlist_head owners;
107 unsigned short port;
108};
109
110/*
111 * Device removal can occur at anytime, so we need extra handling to
112 * serialize notifying the user of device removal with other callbacks.
113 * We do this by disabling removal notification while a callback is in process,
114 * and reporting it after the callback completes.
115 */
116struct rdma_id_private {
117 struct rdma_cm_id id;
118
119 struct rdma_bind_list *bind_list;
120 struct hlist_node node;
d02d1f53
SH		 121 struct list_head list; /* listen_any_list or cma_device.list */
122 struct list_head listen_list; /* per device listens */
e51060f0 123 struct cma_device *cma_dev;
c8f6a362 124 struct list_head mc_list;
e51060f0 125
d02d1f53 126 int internal_id;
e51060f0
SH		 127 enum cma_state state;
128 spinlock_t lock;
c5483388
SH		 129 struct mutex qp_mutex;
130
e51060f0
SH		 131 struct completion comp;
132 atomic_t refcount;
de910bd9 133 struct mutex handler_mutex;
e51060f0
SH		 134
135 int backlog;
136 int timeout_ms;
137 struct ib_sa_query *query;
138 int query_id;
139 union {
140 struct ib_cm_id *ib;
07ebafba 141 struct iw_cm_id *iw;
e51060f0
SH		 142 } cm_id;
143
144 u32 seq_num;
c8f6a362 145 u32 qkey;
e51060f0 146 u32 qp_num;
e51060f0 147 u8 srq;
a81c994d 148 u8 tos;
e51060f0
SH		 149};
150
c8f6a362
SH		 151struct cma_multicast {
152 struct rdma_id_private *id_priv;
153 union {
154 struct ib_sa_multicast *ib;
155 } multicast;
156 struct list_head list;
157 void *context;
3f446754 158 struct sockaddr_storage addr;
c8f6a362
SH		 159};
160
e51060f0
SH		 161struct cma_work {
162 struct work_struct work;
163 struct rdma_id_private *id;
164 enum cma_state old_state;
165 enum cma_state new_state;
166 struct rdma_cm_event event;
167};
168
dd5bdff8
OG		 169struct cma_ndev_work {
170 struct work_struct work;
171 struct rdma_id_private *id;
172 struct rdma_cm_event event;
173};
174
e51060f0
SH		 175union cma_ip_addr {
176 struct in6_addr ip6;
177 struct {
1b90c137
AV		 178 __be32 pad[3];
179 __be32 addr;
e51060f0
SH		 180 } ip4;
181};
182
183struct cma_hdr {
184 u8 cma_version;
185 u8 ip_version; /* IP version: 7:4 */
1b90c137 186 __be16 port;
e51060f0
SH		 187 union cma_ip_addr src_addr;
188 union cma_ip_addr dst_addr;
189};
190
191struct sdp_hh {
192 u8 bsdh[16];
193 u8 sdp_version; /* Major version: 7:4 */
194 u8 ip_version; /* IP version: 7:4 */
195 u8 sdp_specific1[10];
1b90c137
AV		 196 __be16 port;
197 __be16 sdp_specific2;
e51060f0
SH		 198 union cma_ip_addr src_addr;
199 union cma_ip_addr dst_addr;
200};
201
202struct sdp_hah {
203 u8 bsdh[16];
204 u8 sdp_version;
205};
206
207#define CMA_VERSION 0x00
208#define SDP_MAJ_VERSION 0x2
209
210static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
211{
212 unsigned long flags;
213 int ret;
214
215 spin_lock_irqsave(&id_priv->lock, flags);
216 ret = (id_priv->state == comp);
217 spin_unlock_irqrestore(&id_priv->lock, flags);
218 return ret;
219}
220
221static int cma_comp_exch(struct rdma_id_private *id_priv,
222 enum cma_state comp, enum cma_state exch)
223{
224 unsigned long flags;
225 int ret;
226
227 spin_lock_irqsave(&id_priv->lock, flags);
228 if ((ret = (id_priv->state == comp)))
229 id_priv->state = exch;
230 spin_unlock_irqrestore(&id_priv->lock, flags);
231 return ret;
232}
233
234static enum cma_state cma_exch(struct rdma_id_private *id_priv,
235 enum cma_state exch)
236{
237 unsigned long flags;
238 enum cma_state old;
239
240 spin_lock_irqsave(&id_priv->lock, flags);
241 old = id_priv->state;
242 id_priv->state = exch;
243 spin_unlock_irqrestore(&id_priv->lock, flags);
244 return old;
245}
246
247static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
248{
249 return hdr->ip_version >> 4;
250}
251
252static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
253{
254 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
255}
256
257static inline u8 sdp_get_majv(u8 sdp_version)
258{
259 return sdp_version >> 4;
260}
261
262static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
263{
264 return hh->ip_version >> 4;
265}
266
267static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
268{
269 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
270}
271
c8f6a362
SH		 272static inline int cma_is_ud_ps(enum rdma_port_space ps)
273{
274 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
275}
276
e51060f0
SH		 277static void cma_attach_to_dev(struct rdma_id_private *id_priv,
278 struct cma_device *cma_dev)
279{
280 atomic_inc(&cma_dev->refcount);
281 id_priv->cma_dev = cma_dev;
282 id_priv->id.device = cma_dev->device;
283 list_add_tail(&id_priv->list, &cma_dev->id_list);
284}
285
286static inline void cma_deref_dev(struct cma_device *cma_dev)
287{
288 if (atomic_dec_and_test(&cma_dev->refcount))
289 complete(&cma_dev->comp);
290}
291
292static void cma_detach_from_dev(struct rdma_id_private *id_priv)
293{
294 list_del(&id_priv->list);
295 cma_deref_dev(id_priv->cma_dev);
296 id_priv->cma_dev = NULL;
297}
298
c8f6a362
SH		 299static int cma_set_qkey(struct ib_device *device, u8 port_num,
300 enum rdma_port_space ps,
301 struct rdma_dev_addr *dev_addr, u32 *qkey)
302{
303 struct ib_sa_mcmember_rec rec;
304 int ret = 0;
305
306 switch (ps) {
307 case RDMA_PS_UDP:
308 *qkey = RDMA_UDP_QKEY;
309 break;
310 case RDMA_PS_IPOIB:
311 ib_addr_get_mgid(dev_addr, &rec.mgid);
312 ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec);
313 *qkey = be32_to_cpu(rec.qkey);
314 break;
315 default:
316 break;
317 }
318 return ret;
319}
320
07ebafba 321static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 322{
c8f6a362 323 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 324 struct cma_device *cma_dev;
f0ee3404 325 union ib_gid gid;
e51060f0
SH		 326 int ret = -ENODEV;
327
c8f6a362 328 switch (rdma_node_get_transport(dev_addr->dev_type)) {
07ebafba 329 case RDMA_TRANSPORT_IB:
c8f6a362 330 ib_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 331 break;
332 case RDMA_TRANSPORT_IWARP:
c8f6a362 333 iw_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 334 break;
335 default:
336 return -ENODEV;
337 }
61a73c70 338
e51060f0 339 list_for_each_entry(cma_dev, &dev_list, list) {
f0ee3404 340 ret = ib_find_cached_gid(cma_dev->device, &gid,
e51060f0
SH		 341 &id_priv->id.port_num, NULL);
342 if (!ret) {
c8f6a362
SH		 343 ret = cma_set_qkey(cma_dev->device,
344 id_priv->id.port_num,
345 id_priv->id.ps, dev_addr,
346 &id_priv->qkey);
347 if (!ret)
348 cma_attach_to_dev(id_priv, cma_dev);
e51060f0
SH		 349 break;
350 }
351 }
e51060f0
SH		 352 return ret;
353}
354
e51060f0
SH		 355static void cma_deref_id(struct rdma_id_private *id_priv)
356{
357 if (atomic_dec_and_test(&id_priv->refcount))
358 complete(&id_priv->comp);
359}
360
de910bd9 361static int cma_disable_callback(struct rdma_id_private *id_priv,
8aa08602
SH		 362 enum cma_state state)
363{
de910bd9
OG		 364 mutex_lock(&id_priv->handler_mutex);
365 if (id_priv->state != state) {
366 mutex_unlock(&id_priv->handler_mutex);
367 return -EINVAL;
368 }
369 return 0;
e51060f0
SH		 370}
371
6c719f5c
SH		 372static int cma_has_cm_dev(struct rdma_id_private *id_priv)
373{
374 return (id_priv->id.device && id_priv->cm_id.ib);
375}
376
e51060f0
SH		 377struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
378 void *context, enum rdma_port_space ps)
379{
380 struct rdma_id_private *id_priv;
381
382 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
383 if (!id_priv)
384 return ERR_PTR(-ENOMEM);
385
386 id_priv->state = CMA_IDLE;
387 id_priv->id.context = context;
388 id_priv->id.event_handler = event_handler;
389 id_priv->id.ps = ps;
390 spin_lock_init(&id_priv->lock);
c5483388 391 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 392 init_completion(&id_priv->comp);
393 atomic_set(&id_priv->refcount, 1);
de910bd9 394 mutex_init(&id_priv->handler_mutex);
e51060f0 395 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 396 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 397 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
398
399 return &id_priv->id;
400}
401EXPORT_SYMBOL(rdma_create_id);
402
c8f6a362 403static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 404{
405 struct ib_qp_attr qp_attr;
c8f6a362 406 int qp_attr_mask, ret;
e51060f0 407
c8f6a362
SH		 408 qp_attr.qp_state = IB_QPS_INIT;
409 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 410 if (ret)
411 return ret;
412
c8f6a362
SH		 413 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
414 if (ret)
415 return ret;
416
417 qp_attr.qp_state = IB_QPS_RTR;
418 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
419 if (ret)
420 return ret;
421
422 qp_attr.qp_state = IB_QPS_RTS;
423 qp_attr.sq_psn = 0;
424 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
425
426 return ret;
e51060f0
SH		 427}
428
c8f6a362 429static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 430{
431 struct ib_qp_attr qp_attr;
c8f6a362 432 int qp_attr_mask, ret;
07ebafba
TT		 433
434 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 435 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
436 if (ret)
437 return ret;
07ebafba 438
c8f6a362 439 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 440}
441
e51060f0
SH		 442int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
443 struct ib_qp_init_attr *qp_init_attr)
444{
445 struct rdma_id_private *id_priv;
446 struct ib_qp *qp;
447 int ret;
448
449 id_priv = container_of(id, struct rdma_id_private, id);
450 if (id->device != pd->device)
451 return -EINVAL;
452
453 qp = ib_create_qp(pd, qp_init_attr);
454 if (IS_ERR(qp))
455 return PTR_ERR(qp);
456
c8f6a362
SH		 457 if (cma_is_ud_ps(id_priv->id.ps))
458 ret = cma_init_ud_qp(id_priv, qp);
459 else
460 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 461 if (ret)
462 goto err;
463
464 id->qp = qp;
465 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 466 id_priv->srq = (qp->srq != NULL);
467 return 0;
468err:
469 ib_destroy_qp(qp);
470 return ret;
471}
472EXPORT_SYMBOL(rdma_create_qp);
473
474void rdma_destroy_qp(struct rdma_cm_id *id)
475{
c5483388
SH		 476 struct rdma_id_private *id_priv;
477
478 id_priv = container_of(id, struct rdma_id_private, id);
479 mutex_lock(&id_priv->qp_mutex);
480 ib_destroy_qp(id_priv->id.qp);
481 id_priv->id.qp = NULL;
482 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 483}
484EXPORT_SYMBOL(rdma_destroy_qp);
485
5851bb89
SH		 486static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
487 struct rdma_conn_param *conn_param)
e51060f0
SH		 488{
489 struct ib_qp_attr qp_attr;
490 int qp_attr_mask, ret;
491
c5483388
SH		 492 mutex_lock(&id_priv->qp_mutex);
493 if (!id_priv->id.qp) {
494 ret = 0;
495 goto out;
496 }
e51060f0
SH		 497
498 /* Need to update QP attributes from default values. */
499 qp_attr.qp_state = IB_QPS_INIT;
c5483388 500 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 501 if (ret)
c5483388 502 goto out;
e51060f0 503
c5483388 504 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 505 if (ret)
c5483388 506 goto out;
e51060f0
SH		 507
508 qp_attr.qp_state = IB_QPS_RTR;
c5483388 509 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 510 if (ret)
c5483388 511 goto out;
e51060f0 512
5851bb89
SH		 513 if (conn_param)
514 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 515 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
516out:
517 mutex_unlock(&id_priv->qp_mutex);
518 return ret;
e51060f0
SH		 519}
520
5851bb89
SH		 521static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
522 struct rdma_conn_param *conn_param)
e51060f0
SH		 523{
524 struct ib_qp_attr qp_attr;
525 int qp_attr_mask, ret;
526
c5483388
SH		 527 mutex_lock(&id_priv->qp_mutex);
528 if (!id_priv->id.qp) {
529 ret = 0;
530 goto out;
531 }
e51060f0
SH		 532
533 qp_attr.qp_state = IB_QPS_RTS;
c5483388 534 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 535 if (ret)
c5483388 536 goto out;
e51060f0 537
5851bb89
SH		 538 if (conn_param)
539 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 540 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
541out:
542 mutex_unlock(&id_priv->qp_mutex);
543 return ret;
e51060f0
SH		 544}
545
c5483388 546static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 547{
548 struct ib_qp_attr qp_attr;
c5483388 549 int ret;
e51060f0 550
c5483388
SH		 551 mutex_lock(&id_priv->qp_mutex);
552 if (!id_priv->id.qp) {
553 ret = 0;
554 goto out;
555 }
e51060f0
SH		 556
557 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 558 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
559out:
560 mutex_unlock(&id_priv->qp_mutex);
561 return ret;
e51060f0
SH		 562}
563
c8f6a362
SH		 564static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
565 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
566{
567 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
568 int ret;
569
570 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
571 ib_addr_get_pkey(dev_addr),
572 &qp_attr->pkey_index);
573 if (ret)
574 return ret;
575
576 qp_attr->port_num = id_priv->id.port_num;
577 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
578
579 if (cma_is_ud_ps(id_priv->id.ps)) {
580 qp_attr->qkey = id_priv->qkey;
581 *qp_attr_mask |= IB_QP_QKEY;
582 } else {
583 qp_attr->qp_access_flags = 0;
584 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
585 }
586 return 0;
587}
588
e51060f0
SH		 589int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
590 int *qp_attr_mask)
591{
592 struct rdma_id_private *id_priv;
c8f6a362 593 int ret = 0;
e51060f0
SH		 594
595 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 596 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
597 case RDMA_TRANSPORT_IB:
c8f6a362
SH		 598 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
599 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
600 else
601 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
602 qp_attr_mask);
e51060f0
SH		 603 if (qp_attr->qp_state == IB_QPS_RTR)
604 qp_attr->rq_psn = id_priv->seq_num;
605 break;
07ebafba 606 case RDMA_TRANSPORT_IWARP:
c8f6a362 607 if (!id_priv->cm_id.iw) {
8f076531 608 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 609 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
610 } else
611 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
612 qp_attr_mask);
07ebafba 613 break;
e51060f0
SH		 614 default:
615 ret = -ENOSYS;
616 break;
617 }
618
619 return ret;
620}
621EXPORT_SYMBOL(rdma_init_qp_attr);
622
623static inline int cma_zero_addr(struct sockaddr *addr)
624{
625 struct in6_addr *ip6;
626
627 if (addr->sa_family == AF_INET)
6360a02a
JP		 628 return ipv4_is_zeronet(
629 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
e51060f0
SH		 630 else {
631 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
632 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 633 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 634 }
635}
636
637static inline int cma_loopback_addr(struct sockaddr *addr)
638{
6360a02a 639 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
e51060f0
SH		 640}
641
642static inline int cma_any_addr(struct sockaddr *addr)
643{
644 return cma_zero_addr(addr) || cma_loopback_addr(addr);
645}
646
628e5f6d
SH		 647static inline __be16 cma_port(struct sockaddr *addr)
648{
649 if (addr->sa_family == AF_INET)
650 return ((struct sockaddr_in *) addr)->sin_port;
651 else
652 return ((struct sockaddr_in6 *) addr)->sin6_port;
653}
654
e51060f0
SH		 655static inline int cma_any_port(struct sockaddr *addr)
656{
628e5f6d 657 return !cma_port(addr);
e51060f0
SH		 658}
659
660static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
1b90c137 661 u8 *ip_ver, __be16 *port,
e51060f0
SH		 662 union cma_ip_addr **src, union cma_ip_addr **dst)
663{
664 switch (ps) {
665 case RDMA_PS_SDP:
666 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
667 SDP_MAJ_VERSION)
668 return -EINVAL;
669
670 *ip_ver = sdp_get_ip_ver(hdr);
671 *port = ((struct sdp_hh *) hdr)->port;
672 *src = &((struct sdp_hh *) hdr)->src_addr;
673 *dst = &((struct sdp_hh *) hdr)->dst_addr;
674 break;
675 default:
676 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
677 return -EINVAL;
678
679 *ip_ver = cma_get_ip_ver(hdr);
680 *port = ((struct cma_hdr *) hdr)->port;
681 *src = &((struct cma_hdr *) hdr)->src_addr;
682 *dst = &((struct cma_hdr *) hdr)->dst_addr;
683 break;
684 }
685
686 if (*ip_ver != 4 && *ip_ver != 6)
687 return -EINVAL;
688 return 0;
689}
690
691static void cma_save_net_info(struct rdma_addr *addr,
692 struct rdma_addr *listen_addr,
1b90c137 693 u8 ip_ver, __be16 port,
e51060f0
SH		 694 union cma_ip_addr *src, union cma_ip_addr *dst)
695{
696 struct sockaddr_in *listen4, *ip4;
697 struct sockaddr_in6 *listen6, *ip6;
698
699 switch (ip_ver) {
700 case 4:
701 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
702 ip4 = (struct sockaddr_in *) &addr->src_addr;
703 ip4->sin_family = listen4->sin_family;
704 ip4->sin_addr.s_addr = dst->ip4.addr;
705 ip4->sin_port = listen4->sin_port;
706
707 ip4 = (struct sockaddr_in *) &addr->dst_addr;
708 ip4->sin_family = listen4->sin_family;
709 ip4->sin_addr.s_addr = src->ip4.addr;
710 ip4->sin_port = port;
711 break;
712 case 6:
713 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
714 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
715 ip6->sin6_family = listen6->sin6_family;
716 ip6->sin6_addr = dst->ip6;
717 ip6->sin6_port = listen6->sin6_port;
718
719 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
720 ip6->sin6_family = listen6->sin6_family;
721 ip6->sin6_addr = src->ip6;
722 ip6->sin6_port = port;
723 break;
724 default:
725 break;
726 }
727}
728
729static inline int cma_user_data_offset(enum rdma_port_space ps)
730{
731 switch (ps) {
732 case RDMA_PS_SDP:
733 return 0;
734 default:
735 return sizeof(struct cma_hdr);
736 }
737}
738
e51060f0
SH		 739static void cma_cancel_route(struct rdma_id_private *id_priv)
740{
07ebafba
TT		 741 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
742 case RDMA_TRANSPORT_IB:
e51060f0
SH		 743 if (id_priv->query)
744 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
745 break;
746 default:
747 break;
748 }
749}
750
e51060f0
SH		 751static void cma_cancel_listens(struct rdma_id_private *id_priv)
752{
753 struct rdma_id_private *dev_id_priv;
754
d02d1f53
SH		 755 /*
756 * Remove from listen_any_list to prevent added devices from spawning
757 * additional listen requests.
758 */
e51060f0
SH		 759 mutex_lock(&lock);
760 list_del(&id_priv->list);
761
762 while (!list_empty(&id_priv->listen_list)) {
763 dev_id_priv = list_entry(id_priv->listen_list.next,
764 struct rdma_id_private, listen_list);
d02d1f53
SH		 765 /* sync with device removal to avoid duplicate destruction */
766 list_del_init(&dev_id_priv->list);
767 list_del(&dev_id_priv->listen_list);
768 mutex_unlock(&lock);
769
770 rdma_destroy_id(&dev_id_priv->id);
771 mutex_lock(&lock);
e51060f0
SH		 772 }
773 mutex_unlock(&lock);
774}
775
776static void cma_cancel_operation(struct rdma_id_private *id_priv,
777 enum cma_state state)
778{
779 switch (state) {
780 case CMA_ADDR_QUERY:
781 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
782 break;
783 case CMA_ROUTE_QUERY:
784 cma_cancel_route(id_priv);
785 break;
786 case CMA_LISTEN:
3f446754
RD		 787 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
788 && !id_priv->cma_dev)
e51060f0
SH		 789 cma_cancel_listens(id_priv);
790 break;
791 default:
792 break;
793 }
794}
795
796static void cma_release_port(struct rdma_id_private *id_priv)
797{
798 struct rdma_bind_list *bind_list = id_priv->bind_list;
799
800 if (!bind_list)
801 return;
802
803 mutex_lock(&lock);
804 hlist_del(&id_priv->node);
805 if (hlist_empty(&bind_list->owners)) {
806 idr_remove(bind_list->ps, bind_list->port);
807 kfree(bind_list);
808 }
809 mutex_unlock(&lock);
810}
811
c8f6a362
SH		 812static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
813{
814 struct cma_multicast *mc;
815
816 while (!list_empty(&id_priv->mc_list)) {
817 mc = container_of(id_priv->mc_list.next,
818 struct cma_multicast, list);
819 list_del(&mc->list);
820 ib_sa_free_multicast(mc->multicast.ib);
821 kfree(mc);
822 }
823}
824
e51060f0
SH		 825void rdma_destroy_id(struct rdma_cm_id *id)
826{
827 struct rdma_id_private *id_priv;
828 enum cma_state state;
829
830 id_priv = container_of(id, struct rdma_id_private, id);
831 state = cma_exch(id_priv, CMA_DESTROYING);
832 cma_cancel_operation(id_priv, state);
833
61a73c70 834 mutex_lock(&lock);
e51060f0 835 if (id_priv->cma_dev) {
61a73c70 836 mutex_unlock(&lock);
07ebafba
TT		 837 switch (rdma_node_get_transport(id->device->node_type)) {
838 case RDMA_TRANSPORT_IB:
3cd96564 839 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 840 ib_destroy_cm_id(id_priv->cm_id.ib);
841 break;
07ebafba
TT		 842 case RDMA_TRANSPORT_IWARP:
843 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
844 iw_destroy_cm_id(id_priv->cm_id.iw);
845 break;
e51060f0
SH		 846 default:
847 break;
848 }
c8f6a362 849 cma_leave_mc_groups(id_priv);
3cd96564 850 mutex_lock(&lock);
e51060f0 851 cma_detach_from_dev(id_priv);
e51060f0 852 }
61a73c70 853 mutex_unlock(&lock);
e51060f0
SH		 854
855 cma_release_port(id_priv);
856 cma_deref_id(id_priv);
857 wait_for_completion(&id_priv->comp);
858
d02d1f53
SH		 859 if (id_priv->internal_id)
860 cma_deref_id(id_priv->id.context);
861
e51060f0
SH		 862 kfree(id_priv->id.route.path_rec);
863 kfree(id_priv);
864}
865EXPORT_SYMBOL(rdma_destroy_id);
866
867static int cma_rep_recv(struct rdma_id_private *id_priv)
868{
869 int ret;
870
5851bb89 871 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 872 if (ret)
873 goto reject;
874
5851bb89 875 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 876 if (ret)
877 goto reject;
878
879 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
880 if (ret)
881 goto reject;
882
883 return 0;
884reject:
c5483388 885 cma_modify_qp_err(id_priv);
e51060f0
SH		 886 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
887 NULL, 0, NULL, 0);
888 return ret;
889}
890
891static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
892{
893 if (id_priv->id.ps == RDMA_PS_SDP &&
894 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
895 SDP_MAJ_VERSION)
896 return -EINVAL;
897
898 return 0;
899}
900
a1b1b61f
SH		 901static void cma_set_rep_event_data(struct rdma_cm_event *event,
902 struct ib_cm_rep_event_param *rep_data,
903 void *private_data)
904{
905 event->param.conn.private_data = private_data;
906 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
907 event->param.conn.responder_resources = rep_data->responder_resources;
908 event->param.conn.initiator_depth = rep_data->initiator_depth;
909 event->param.conn.flow_control = rep_data->flow_control;
910 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
911 event->param.conn.srq = rep_data->srq;
912 event->param.conn.qp_num = rep_data->remote_qpn;
913}
914
e51060f0
SH		 915static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
916{
917 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 918 struct rdma_cm_event event;
919 int ret = 0;
e51060f0 920
38ca83a5
AV		 921 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
922 cma_disable_callback(id_priv, CMA_CONNECT)) ||
923 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
924 cma_disable_callback(id_priv, CMA_DISCONNECT)))
8aa08602 925 return 0;
e51060f0 926
a1b1b61f 927 memset(&event, 0, sizeof event);
e51060f0
SH		 928 switch (ib_event->event) {
929 case IB_CM_REQ_ERROR:
930 case IB_CM_REP_ERROR:
a1b1b61f
SH		 931 event.event = RDMA_CM_EVENT_UNREACHABLE;
932 event.status = -ETIMEDOUT;
e51060f0
SH		 933 break;
934 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 935 event.status = cma_verify_rep(id_priv, ib_event->private_data);
936 if (event.status)
937 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 938 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 939 event.status = cma_rep_recv(id_priv);
940 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
941 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 942 } else
a1b1b61f
SH		 943 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
944 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
945 ib_event->private_data);
e51060f0
SH		 946 break;
947 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 948 case IB_CM_USER_ESTABLISHED:
949 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 950 break;
951 case IB_CM_DREQ_ERROR:
a1b1b61f 952 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 953 case IB_CM_DREQ_RECEIVED:
954 case IB_CM_DREP_RECEIVED:
955 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
956 goto out;
a1b1b61f 957 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 958 break;
959 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 960 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
961 break;
e51060f0
SH		 962 case IB_CM_MRA_RECEIVED:
963 /* ignore event */
964 goto out;
965 case IB_CM_REJ_RECEIVED:
c5483388 966 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 967 event.status = ib_event->param.rej_rcvd.reason;
968 event.event = RDMA_CM_EVENT_REJECTED;
969 event.param.conn.private_data = ib_event->private_data;
970 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 971 break;
972 default:
468f2239 973 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 974 ib_event->event);
975 goto out;
976 }
977
a1b1b61f 978 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 979 if (ret) {
980 /* Destroy the CM ID by returning a non-zero value. */
981 id_priv->cm_id.ib = NULL;
982 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 983 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 984 rdma_destroy_id(&id_priv->id);
985 return ret;
986 }
987out:
de910bd9 988 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 989 return ret;
990}
991
628e5f6d
SH		 992static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
993 struct ib_cm_event *ib_event)
e51060f0
SH		 994{
995 struct rdma_id_private *id_priv;
996 struct rdma_cm_id *id;
997 struct rdma_route *rt;
998 union cma_ip_addr *src, *dst;
1b90c137 999 __be16 port;
e51060f0 1000 u8 ip_ver;
64c5e613 1001 int ret;
e51060f0 1002
3f168d2b
KK		 1003 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1004 &ip_ver, &port, &src, &dst))
1005 goto err;
1006
e51060f0
SH		 1007 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1008 listen_id->ps);
1009 if (IS_ERR(id))
3f168d2b
KK		 1010 goto err;
1011
1012 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1013 ip_ver, port, src, dst);
e51060f0
SH		 1014
1015 rt = &id->route;
1016 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1017 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1018 GFP_KERNEL);
e51060f0 1019 if (!rt->path_rec)
3f168d2b 1020 goto destroy_id;
e51060f0 1021
e51060f0
SH		 1022 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1023 if (rt->num_paths == 2)
1024 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1025
e51060f0 1026 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
3f446754 1027 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
64c5e613
OG		 1028 &id->route.addr.dev_addr);
1029 if (ret)
1030 goto destroy_id;
e51060f0
SH		 1031
1032 id_priv = container_of(id, struct rdma_id_private, id);
1033 id_priv->state = CMA_CONNECT;
1034 return id_priv;
3f168d2b
KK		 1035
1036destroy_id:
e51060f0 1037 rdma_destroy_id(id);
3f168d2b 1038err:
e51060f0
SH		 1039 return NULL;
1040}
1041
628e5f6d
SH		 1042static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1043 struct ib_cm_event *ib_event)
1044{
1045 struct rdma_id_private *id_priv;
1046 struct rdma_cm_id *id;
1047 union cma_ip_addr *src, *dst;
1b90c137 1048 __be16 port;
628e5f6d
SH		 1049 u8 ip_ver;
1050 int ret;
1051
1052 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1053 listen_id->ps);
1054 if (IS_ERR(id))
1055 return NULL;
1056
1057
1058 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1059 &ip_ver, &port, &src, &dst))
1060 goto err;
1061
1062 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1063 ip_ver, port, src, dst);
1064
3f446754 1065 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
628e5f6d
SH		 1066 &id->route.addr.dev_addr);
1067 if (ret)
1068 goto err;
1069
1070 id_priv = container_of(id, struct rdma_id_private, id);
1071 id_priv->state = CMA_CONNECT;
1072 return id_priv;
1073err:
1074 rdma_destroy_id(id);
1075 return NULL;
1076}
1077
a1b1b61f
SH		 1078static void cma_set_req_event_data(struct rdma_cm_event *event,
1079 struct ib_cm_req_event_param *req_data,
1080 void *private_data, int offset)
1081{
1082 event->param.conn.private_data = private_data + offset;
1083 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1084 event->param.conn.responder_resources = req_data->responder_resources;
1085 event->param.conn.initiator_depth = req_data->initiator_depth;
1086 event->param.conn.flow_control = req_data->flow_control;
1087 event->param.conn.retry_count = req_data->retry_count;
1088 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1089 event->param.conn.srq = req_data->srq;
1090 event->param.conn.qp_num = req_data->remote_qpn;
1091}
1092
e51060f0
SH		 1093static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1094{
1095 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1096 struct rdma_cm_event event;
e51060f0
SH		 1097 int offset, ret;
1098
1099 listen_id = cm_id->context;
de910bd9 1100 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1101 return -ECONNABORTED;
e51060f0 1102
628e5f6d
SH		 1103 memset(&event, 0, sizeof event);
1104 offset = cma_user_data_offset(listen_id->id.ps);
1105 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
c8f6a362 1106 if (cma_is_ud_ps(listen_id->id.ps)) {
628e5f6d
SH		 1107 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1108 event.param.ud.private_data = ib_event->private_data + offset;
1109 event.param.ud.private_data_len =
1110 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1111 } else {
1112 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1113 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1114 ib_event->private_data, offset);
1115 }
e51060f0
SH		 1116 if (!conn_id) {
1117 ret = -ENOMEM;
1118 goto out;
1119 }
1120
de910bd9 1121 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
61a73c70 1122 mutex_lock(&lock);
07ebafba 1123 ret = cma_acquire_dev(conn_id);
61a73c70 1124 mutex_unlock(&lock);
a1a733f6
KK		 1125 if (ret)
1126 goto release_conn_id;
e51060f0
SH		 1127
1128 conn_id->cm_id.ib = cm_id;
1129 cm_id->context = conn_id;
1130 cm_id->cm_handler = cma_ib_handler;
1131
a1b1b61f 1132 ret = conn_id->id.event_handler(&conn_id->id, &event);
45d9478d 1133 if (!ret) {
ead595ae
SH		 1134 /*
1135 * Acquire mutex to prevent user executing rdma_destroy_id()
1136 * while we're accessing the cm_id.
1137 */
1138 mutex_lock(&lock);
1139 if (cma_comp(conn_id, CMA_CONNECT) &&
1140 !cma_is_ud_ps(conn_id->id.ps))
1141 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1142 mutex_unlock(&lock);
de910bd9 1143 mutex_unlock(&conn_id->handler_mutex);
a1a733f6 1144 goto out;
45d9478d 1145 }
a1a733f6
KK		 1146
1147 /* Destroy the CM ID by returning a non-zero value. */
1148 conn_id->cm_id.ib = NULL;
1149
1150release_conn_id:
1151 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1152 mutex_unlock(&conn_id->handler_mutex);
a1a733f6
KK		 1153 rdma_destroy_id(&conn_id->id);
1154
e51060f0 1155out:
de910bd9 1156 mutex_unlock(&listen_id->handler_mutex);
e51060f0
SH		 1157 return ret;
1158}
1159
1160static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1161{
628e5f6d 1162 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1163}
1164
1165static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1166 struct ib_cm_compare_data *compare)
1167{
1168 struct cma_hdr *cma_data, *cma_mask;
1169 struct sdp_hh *sdp_data, *sdp_mask;
1b90c137 1170 __be32 ip4_addr;
e51060f0
SH		 1171 struct in6_addr ip6_addr;
1172
1173 memset(compare, 0, sizeof *compare);
1174 cma_data = (void *) compare->data;
1175 cma_mask = (void *) compare->mask;
1176 sdp_data = (void *) compare->data;
1177 sdp_mask = (void *) compare->mask;
1178
1179 switch (addr->sa_family) {
1180 case AF_INET:
1181 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1182 if (ps == RDMA_PS_SDP) {
1183 sdp_set_ip_ver(sdp_data, 4);
1184 sdp_set_ip_ver(sdp_mask, 0xF);
1185 sdp_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1186 sdp_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1187 } else {
1188 cma_set_ip_ver(cma_data, 4);
1189 cma_set_ip_ver(cma_mask, 0xF);
1190 cma_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1191 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1192 }
1193 break;
1194 case AF_INET6:
1195 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1196 if (ps == RDMA_PS_SDP) {
1197 sdp_set_ip_ver(sdp_data, 6);
1198 sdp_set_ip_ver(sdp_mask, 0xF);
1199 sdp_data->dst_addr.ip6 = ip6_addr;
1200 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1201 sizeof sdp_mask->dst_addr.ip6);
1202 } else {
1203 cma_set_ip_ver(cma_data, 6);
1204 cma_set_ip_ver(cma_mask, 0xF);
1205 cma_data->dst_addr.ip6 = ip6_addr;
1206 memset(&cma_mask->dst_addr.ip6, 0xFF,
1207 sizeof cma_mask->dst_addr.ip6);
1208 }
1209 break;
1210 default:
1211 break;
1212 }
1213}
1214
07ebafba
TT		 1215static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1216{
1217 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1218 struct rdma_cm_event event;
07ebafba
TT		 1219 struct sockaddr_in *sin;
1220 int ret = 0;
1221
de910bd9 1222 if (cma_disable_callback(id_priv, CMA_CONNECT))
be65f086 1223 return 0;
07ebafba 1224
be65f086 1225 memset(&event, 0, sizeof event);
07ebafba
TT		 1226 switch (iw_event->event) {
1227 case IW_CM_EVENT_CLOSE:
a1b1b61f 1228 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1229 break;
1230 case IW_CM_EVENT_CONNECT_REPLY:
1231 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1232 *sin = iw_event->local_addr;
1233 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1234 *sin = iw_event->remote_addr;
881a045f
SW		 1235 switch (iw_event->status) {
1236 case 0:
a1b1b61f 1237 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1238 break;
1239 case -ECONNRESET:
1240 case -ECONNREFUSED:
1241 event.event = RDMA_CM_EVENT_REJECTED;
1242 break;
1243 case -ETIMEDOUT:
1244 event.event = RDMA_CM_EVENT_UNREACHABLE;
1245 break;
1246 default:
1247 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1248 break;
1249 }
07ebafba
TT		 1250 break;
1251 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1252 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1253 break;
1254 default:
1255 BUG_ON(1);
1256 }
1257
a1b1b61f
SH		 1258 event.status = iw_event->status;
1259 event.param.conn.private_data = iw_event->private_data;
1260 event.param.conn.private_data_len = iw_event->private_data_len;
1261 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1262 if (ret) {
1263 /* Destroy the CM ID by returning a non-zero value. */
1264 id_priv->cm_id.iw = NULL;
1265 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1266 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1267 rdma_destroy_id(&id_priv->id);
1268 return ret;
1269 }
1270
de910bd9 1271 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1272 return ret;
1273}
1274
1275static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1276 struct iw_cm_event *iw_event)
1277{
1278 struct rdma_cm_id *new_cm_id;
1279 struct rdma_id_private *listen_id, *conn_id;
1280 struct sockaddr_in *sin;
1281 struct net_device *dev = NULL;
a1b1b61f 1282 struct rdma_cm_event event;
07ebafba 1283 int ret;
8d8293cf 1284 struct ib_device_attr attr;
07ebafba
TT		 1285
1286 listen_id = cm_id->context;
de910bd9 1287 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1288 return -ECONNABORTED;
07ebafba
TT		 1289
1290 /* Create a new RDMA id for the new IW CM ID */
1291 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1292 listen_id->id.context,
1293 RDMA_PS_TCP);
10f32065 1294 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1295 ret = -ENOMEM;
1296 goto out;
1297 }
1298 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1299 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba
TT		 1300 conn_id->state = CMA_CONNECT;
1301
1ab35276 1302 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
07ebafba
TT		 1303 if (!dev) {
1304 ret = -EADDRNOTAVAIL;
de910bd9 1305 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1306 rdma_destroy_id(new_cm_id);
1307 goto out;
1308 }
1309 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1310 if (ret) {
de910bd9 1311 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1312 rdma_destroy_id(new_cm_id);
1313 goto out;
1314 }
1315
61a73c70 1316 mutex_lock(&lock);
07ebafba 1317 ret = cma_acquire_dev(conn_id);
61a73c70 1318 mutex_unlock(&lock);
07ebafba 1319 if (ret) {
de910bd9 1320 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1321 rdma_destroy_id(new_cm_id);
1322 goto out;
1323 }
1324
1325 conn_id->cm_id.iw = cm_id;
1326 cm_id->context = conn_id;
1327 cm_id->cm_handler = cma_iw_handler;
1328
1329 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1330 *sin = iw_event->local_addr;
1331 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1332 *sin = iw_event->remote_addr;
1333
8d8293cf
SW		 1334 ret = ib_query_device(conn_id->id.device, &attr);
1335 if (ret) {
de910bd9 1336 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1337 rdma_destroy_id(new_cm_id);
1338 goto out;
1339 }
1340
a1b1b61f
SH		 1341 memset(&event, 0, sizeof event);
1342 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1343 event.param.conn.private_data = iw_event->private_data;
1344 event.param.conn.private_data_len = iw_event->private_data_len;
8d8293cf
SW		 1345 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1346 event.param.conn.responder_resources = attr.max_qp_rd_atom;
a1b1b61f 1347 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1348 if (ret) {
1349 /* User wants to destroy the CM ID */
1350 conn_id->cm_id.iw = NULL;
1351 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1352 mutex_unlock(&conn_id->handler_mutex);
07ebafba 1353 rdma_destroy_id(&conn_id->id);
de910bd9 1354 goto out;
07ebafba
TT		 1355 }
1356
de910bd9
OG		 1357 mutex_unlock(&conn_id->handler_mutex);
1358
07ebafba
TT		 1359out:
1360 if (dev)
1361 dev_put(dev);
de910bd9 1362 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1363 return ret;
1364}
1365
e51060f0
SH		 1366static int cma_ib_listen(struct rdma_id_private *id_priv)
1367{
1368 struct ib_cm_compare_data compare_data;
1369 struct sockaddr *addr;
1370 __be64 svc_id;
1371 int ret;
1372
1373 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1374 id_priv);
1375 if (IS_ERR(id_priv->cm_id.ib))
1376 return PTR_ERR(id_priv->cm_id.ib);
1377
3f446754 1378 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
e51060f0
SH		 1379 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1380 if (cma_any_addr(addr))
1381 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1382 else {
1383 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1384 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1385 }
1386
1387 if (ret) {
1388 ib_destroy_cm_id(id_priv->cm_id.ib);
1389 id_priv->cm_id.ib = NULL;
1390 }
1391
1392 return ret;
1393}
1394
07ebafba
TT		 1395static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1396{
1397 int ret;
1398 struct sockaddr_in *sin;
1399
1400 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1401 iw_conn_req_handler,
1402 id_priv);
1403 if (IS_ERR(id_priv->cm_id.iw))
1404 return PTR_ERR(id_priv->cm_id.iw);
1405
1406 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1407 id_priv->cm_id.iw->local_addr = *sin;
1408
1409 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1410
1411 if (ret) {
1412 iw_destroy_cm_id(id_priv->cm_id.iw);
1413 id_priv->cm_id.iw = NULL;
1414 }
1415
1416 return ret;
1417}
1418
e51060f0
SH		 1419static int cma_listen_handler(struct rdma_cm_id *id,
1420 struct rdma_cm_event *event)
1421{
1422 struct rdma_id_private *id_priv = id->context;
1423
1424 id->context = id_priv->id.context;
1425 id->event_handler = id_priv->id.event_handler;
1426 return id_priv->id.event_handler(id, event);
1427}
1428
1429static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1430 struct cma_device *cma_dev)
1431{
1432 struct rdma_id_private *dev_id_priv;
1433 struct rdma_cm_id *id;
1434 int ret;
1435
1436 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1437 if (IS_ERR(id))
1438 return;
1439
1440 dev_id_priv = container_of(id, struct rdma_id_private, id);
1441
1442 dev_id_priv->state = CMA_ADDR_BOUND;
1443 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
3f446754 1444 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
e51060f0
SH		 1445
1446 cma_attach_to_dev(dev_id_priv, cma_dev);
1447 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1448 atomic_inc(&id_priv->refcount);
1449 dev_id_priv->internal_id = 1;
e51060f0
SH		 1450
1451 ret = rdma_listen(id, id_priv->backlog);
1452 if (ret)
d02d1f53 1453 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1454 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1455}
1456
1457static void cma_listen_on_all(struct rdma_id_private *id_priv)
1458{
1459 struct cma_device *cma_dev;
1460
1461 mutex_lock(&lock);
1462 list_add_tail(&id_priv->list, &listen_any_list);
1463 list_for_each_entry(cma_dev, &dev_list, list)
1464 cma_listen_on_dev(id_priv, cma_dev);
1465 mutex_unlock(&lock);
1466}
1467
1468static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1469{
1470 struct sockaddr_in addr_in;
1471
1472 memset(&addr_in, 0, sizeof addr_in);
1473 addr_in.sin_family = af;
1474 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1475}
1476
1477int rdma_listen(struct rdma_cm_id *id, int backlog)
1478{
1479 struct rdma_id_private *id_priv;
1480 int ret;
1481
1482 id_priv = container_of(id, struct rdma_id_private, id);
1483 if (id_priv->state == CMA_IDLE) {
1484 ret = cma_bind_any(id, AF_INET);
1485 if (ret)
1486 return ret;
1487 }
1488
1489 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1490 return -EINVAL;
1491
1492 id_priv->backlog = backlog;
1493 if (id->device) {
07ebafba
TT		 1494 switch (rdma_node_get_transport(id->device->node_type)) {
1495 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1496 ret = cma_ib_listen(id_priv);
1497 if (ret)
1498 goto err;
1499 break;
07ebafba
TT		 1500 case RDMA_TRANSPORT_IWARP:
1501 ret = cma_iw_listen(id_priv, backlog);
1502 if (ret)
1503 goto err;
1504 break;
e51060f0
SH		 1505 default:
1506 ret = -ENOSYS;
1507 goto err;
1508 }
1509 } else
1510 cma_listen_on_all(id_priv);
1511
1512 return 0;
1513err:
1514 id_priv->backlog = 0;
1515 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1516 return ret;
1517}
1518EXPORT_SYMBOL(rdma_listen);
1519
a81c994d
SH		 1520void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1521{
1522 struct rdma_id_private *id_priv;
1523
1524 id_priv = container_of(id, struct rdma_id_private, id);
1525 id_priv->tos = (u8) tos;
1526}
1527EXPORT_SYMBOL(rdma_set_service_type);
1528
e51060f0
SH		 1529static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1530 void *context)
1531{
1532 struct cma_work *work = context;
1533 struct rdma_route *route;
1534
1535 route = &work->id->id.route;
1536
1537 if (!status) {
1538 route->num_paths = 1;
1539 *route->path_rec = *path_rec;
1540 } else {
1541 work->old_state = CMA_ROUTE_QUERY;
1542 work->new_state = CMA_ADDR_RESOLVED;
1543 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1544 work->event.status = status;
e51060f0
SH		 1545 }
1546
1547 queue_work(cma_wq, &work->work);
1548}
1549
1550static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1551 struct cma_work *work)
1552{
a81c994d 1553 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1554 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1555 ib_sa_comp_mask comp_mask;
1556 struct sockaddr_in6 *sin6;
e51060f0
SH		 1557
1558 memset(&path_rec, 0, sizeof path_rec);
a81c994d
SH		 1559 ib_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1560 ib_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1561 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1562 path_rec.numb_path = 1;
962063e6 1563 path_rec.reversible = 1;
3f446754
RD		 1564 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1565 (struct sockaddr *) &addr->dst_addr);
a81c994d
SH		 1566
1567 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1568 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1569 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1570
3f446754 1571 if (addr->src_addr.ss_family == AF_INET) {
a81c994d
SH		 1572 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1573 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1574 } else {
1575 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1576 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1577 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1578 }
e51060f0 1579
c1a0b23b 1580 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1581 id_priv->id.port_num, &path_rec,
1582 comp_mask, timeout_ms,
1583 GFP_KERNEL, cma_query_handler,
1584 work, &id_priv->query);
e51060f0
SH		 1585
1586 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1587}
1588
c4028958 1589static void cma_work_handler(struct work_struct *_work)
e51060f0 1590{
c4028958 1591 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1592 struct rdma_id_private *id_priv = work->id;
1593 int destroy = 0;
1594
de910bd9 1595 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1596 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1597 goto out;
1598
1599 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1600 cma_exch(id_priv, CMA_DESTROYING);
1601 destroy = 1;
1602 }
1603out:
de910bd9 1604 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1605 cma_deref_id(id_priv);
1606 if (destroy)
1607 rdma_destroy_id(&id_priv->id);
1608 kfree(work);
1609}
1610
dd5bdff8
OG		 1611static void cma_ndev_work_handler(struct work_struct *_work)
1612{
1613 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1614 struct rdma_id_private *id_priv = work->id;
1615 int destroy = 0;
1616
1617 mutex_lock(&id_priv->handler_mutex);
1618 if (id_priv->state == CMA_DESTROYING ||
1619 id_priv->state == CMA_DEVICE_REMOVAL)
1620 goto out;
1621
1622 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1623 cma_exch(id_priv, CMA_DESTROYING);
1624 destroy = 1;
1625 }
1626
1627out:
1628 mutex_unlock(&id_priv->handler_mutex);
1629 cma_deref_id(id_priv);
1630 if (destroy)
1631 rdma_destroy_id(&id_priv->id);
1632 kfree(work);
1633}
1634
e51060f0
SH		 1635static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1636{
1637 struct rdma_route *route = &id_priv->id.route;
1638 struct cma_work *work;
1639 int ret;
1640
1641 work = kzalloc(sizeof *work, GFP_KERNEL);
1642 if (!work)
1643 return -ENOMEM;
1644
1645 work->id = id_priv;
c4028958 1646 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1647 work->old_state = CMA_ROUTE_QUERY;
1648 work->new_state = CMA_ROUTE_RESOLVED;
1649 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1650
1651 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1652 if (!route->path_rec) {
1653 ret = -ENOMEM;
1654 goto err1;
1655 }
1656
1657 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1658 if (ret)
1659 goto err2;
1660
1661 return 0;
1662err2:
1663 kfree(route->path_rec);
1664 route->path_rec = NULL;
1665err1:
1666 kfree(work);
1667 return ret;
1668}
1669
1670int rdma_set_ib_paths(struct rdma_cm_id *id,
1671 struct ib_sa_path_rec *path_rec, int num_paths)
1672{
1673 struct rdma_id_private *id_priv;
1674 int ret;
1675
1676 id_priv = container_of(id, struct rdma_id_private, id);
1677 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1678 return -EINVAL;
1679
1680 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1681 if (!id->route.path_rec) {
1682 ret = -ENOMEM;
1683 goto err;
1684 }
1685
1686 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1687 return 0;
1688err:
1689 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1690 return ret;
1691}
1692EXPORT_SYMBOL(rdma_set_ib_paths);
1693
07ebafba
TT		 1694static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1695{
1696 struct cma_work *work;
1697
1698 work = kzalloc(sizeof *work, GFP_KERNEL);
1699 if (!work)
1700 return -ENOMEM;
1701
1702 work->id = id_priv;
c4028958 1703 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1704 work->old_state = CMA_ROUTE_QUERY;
1705 work->new_state = CMA_ROUTE_RESOLVED;
1706 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1707 queue_work(cma_wq, &work->work);
1708 return 0;
1709}
1710
e51060f0
SH		 1711int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1712{
1713 struct rdma_id_private *id_priv;
1714 int ret;
1715
1716 id_priv = container_of(id, struct rdma_id_private, id);
1717 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1718 return -EINVAL;
1719
1720 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1721 switch (rdma_node_get_transport(id->device->node_type)) {
1722 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1723 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1724 break;
07ebafba
TT		 1725 case RDMA_TRANSPORT_IWARP:
1726 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1727 break;
e51060f0
SH		 1728 default:
1729 ret = -ENOSYS;
1730 break;
1731 }
1732 if (ret)
1733 goto err;
1734
1735 return 0;
1736err:
1737 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1738 cma_deref_id(id_priv);
1739 return ret;
1740}
1741EXPORT_SYMBOL(rdma_resolve_route);
1742
1743static int cma_bind_loopback(struct rdma_id_private *id_priv)
1744{
1745 struct cma_device *cma_dev;
1746 struct ib_port_attr port_attr;
f0ee3404 1747 union ib_gid gid;
e51060f0
SH		 1748 u16 pkey;
1749 int ret;
1750 u8 p;
1751
1752 mutex_lock(&lock);
e82153b5
KK		 1753 if (list_empty(&dev_list)) {
1754 ret = -ENODEV;
1755 goto out;
1756 }
e51060f0
SH		 1757 list_for_each_entry(cma_dev, &dev_list, list)
1758 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1759 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1760 port_attr.state == IB_PORT_ACTIVE)
1761 goto port_found;
1762
e82153b5
KK		 1763 p = 1;
1764 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1765
1766port_found:
f0ee3404 1767 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1768 if (ret)
1769 goto out;
1770
1771 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1772 if (ret)
1773 goto out;
1774
f0ee3404 1775 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1776 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1777 id_priv->id.port_num = p;
1778 cma_attach_to_dev(id_priv, cma_dev);
1779out:
1780 mutex_unlock(&lock);
1781 return ret;
1782}
1783
1784static void addr_handler(int status, struct sockaddr *src_addr,
1785 struct rdma_dev_addr *dev_addr, void *context)
1786{
1787 struct rdma_id_private *id_priv = context;
a1b1b61f 1788 struct rdma_cm_event event;
e51060f0 1789
a1b1b61f 1790 memset(&event, 0, sizeof event);
de910bd9 1791 mutex_lock(&id_priv->handler_mutex);
61a73c70
SH		 1792
1793 /*
1794 * Grab mutex to block rdma_destroy_id() from removing the device while
1795 * we're trying to acquire it.
1796 */
1797 mutex_lock(&lock);
1798 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1799 mutex_unlock(&lock);
1800 goto out;
1801 }
1802
1803 if (!status && !id_priv->cma_dev)
e51060f0 1804 status = cma_acquire_dev(id_priv);
61a73c70 1805 mutex_unlock(&lock);
e51060f0
SH		 1806
1807 if (status) {
61a73c70 1808 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1809 goto out;
a1b1b61f
SH		 1810 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1811 event.status = status;
e51060f0 1812 } else {
e51060f0
SH		 1813 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1814 ip_addr_size(src_addr));
a1b1b61f 1815 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1816 }
1817
a1b1b61f 1818 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1819 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1820 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1821 cma_deref_id(id_priv);
1822 rdma_destroy_id(&id_priv->id);
1823 return;
1824 }
1825out:
de910bd9 1826 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1827 cma_deref_id(id_priv);
1828}
1829
1830static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1831{
1832 struct cma_work *work;
1833 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1834 union ib_gid gid;
e51060f0
SH		 1835 int ret;
1836
1837 work = kzalloc(sizeof *work, GFP_KERNEL);
1838 if (!work)
1839 return -ENOMEM;
1840
1841 if (!id_priv->cma_dev) {
1842 ret = cma_bind_loopback(id_priv);
1843 if (ret)
1844 goto err;
1845 }
1846
f0ee3404
MT		 1847 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1848 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 1849
3f446754 1850 if (cma_zero_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)) {
e51060f0
SH		 1851 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1852 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1853 src_in->sin_family = dst_in->sin_family;
1854 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1855 }
1856
1857 work->id = id_priv;
c4028958 1858 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1859 work->old_state = CMA_ADDR_QUERY;
1860 work->new_state = CMA_ADDR_RESOLVED;
1861 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1862 queue_work(cma_wq, &work->work);
1863 return 0;
1864err:
1865 kfree(work);
1866 return ret;
1867}
1868
1869static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1870 struct sockaddr *dst_addr)
1871{
1872 if (src_addr && src_addr->sa_family)
1873 return rdma_bind_addr(id, src_addr);
1874 else
1875 return cma_bind_any(id, dst_addr->sa_family);
1876}
1877
1878int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1879 struct sockaddr *dst_addr, int timeout_ms)
1880{
1881 struct rdma_id_private *id_priv;
1882 int ret;
1883
1884 id_priv = container_of(id, struct rdma_id_private, id);
1885 if (id_priv->state == CMA_IDLE) {
1886 ret = cma_bind_addr(id, src_addr, dst_addr);
1887 if (ret)
1888 return ret;
1889 }
1890
1891 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1892 return -EINVAL;
1893
1894 atomic_inc(&id_priv->refcount);
1895 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1896 if (cma_any_addr(dst_addr))
1897 ret = cma_resolve_loopback(id_priv);
1898 else
3f446754 1899 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 1900 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1901 timeout_ms, addr_handler, id_priv);
1902 if (ret)
1903 goto err;
1904
1905 return 0;
1906err:
1907 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1908 cma_deref_id(id_priv);
1909 return ret;
1910}
1911EXPORT_SYMBOL(rdma_resolve_addr);
1912
1913static void cma_bind_port(struct rdma_bind_list *bind_list,
1914 struct rdma_id_private *id_priv)
1915{
1916 struct sockaddr_in *sin;
1917
1918 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1919 sin->sin_port = htons(bind_list->port);
1920 id_priv->bind_list = bind_list;
1921 hlist_add_head(&id_priv->node, &bind_list->owners);
1922}
1923
1924static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1925 unsigned short snum)
1926{
1927 struct rdma_bind_list *bind_list;
aedec080 1928 int port, ret;
e51060f0 1929
cb164b8c 1930 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 1931 if (!bind_list)
1932 return -ENOMEM;
1933
aedec080
SH		 1934 do {
1935 ret = idr_get_new_above(ps, bind_list, snum, &port);
1936 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1937
1938 if (ret)
1939 goto err1;
1940
1941 if (port != snum) {
1942 ret = -EADDRNOTAVAIL;
1943 goto err2;
1944 }
1945
1946 bind_list->ps = ps;
1947 bind_list->port = (unsigned short) port;
1948 cma_bind_port(bind_list, id_priv);
1949 return 0;
1950err2:
1951 idr_remove(ps, port);
1952err1:
1953 kfree(bind_list);
1954 return ret;
1955}
e51060f0 1956
aedec080
SH		 1957static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1958{
1959 struct rdma_bind_list *bind_list;
227b60f5 1960 int port, ret, low, high;
aedec080
SH		 1961
1962 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1963 if (!bind_list)
1964 return -ENOMEM;
1965
1966retry:
227b60f5 1967 /* FIXME: add proper port randomization per like inet_csk_get_port */
e51060f0 1968 do {
aedec080 1969 ret = idr_get_new_above(ps, bind_list, next_port, &port);
e51060f0
SH		 1970 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1971
1972 if (ret)
aedec080 1973 goto err1;
e51060f0 1974
227b60f5
SH		 1975 inet_get_local_port_range(&low, &high);
1976 if (port > high) {
1977 if (next_port != low) {
aedec080 1978 idr_remove(ps, port);
227b60f5 1979 next_port = low;
aedec080
SH		 1980 goto retry;
1981 }
e51060f0 1982 ret = -EADDRNOTAVAIL;
aedec080 1983 goto err2;
e51060f0
SH		 1984 }
1985
227b60f5
SH		 1986 if (port == high)
1987 next_port = low;
aedec080
SH		 1988 else
1989 next_port = port + 1;
1990
e51060f0
SH		 1991 bind_list->ps = ps;
1992 bind_list->port = (unsigned short) port;
1993 cma_bind_port(bind_list, id_priv);
1994 return 0;
aedec080
SH		 1995err2:
1996 idr_remove(ps, port);
1997err1:
e51060f0
SH		 1998 kfree(bind_list);
1999 return ret;
2000}
2001
2002static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2003{
2004 struct rdma_id_private *cur_id;
2005 struct sockaddr_in *sin, *cur_sin;
2006 struct rdma_bind_list *bind_list;
2007 struct hlist_node *node;
2008 unsigned short snum;
2009
2010 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2011 snum = ntohs(sin->sin_port);
2012 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2013 return -EACCES;
2014
2015 bind_list = idr_find(ps, snum);
2016 if (!bind_list)
2017 return cma_alloc_port(ps, id_priv, snum);
2018
2019 /*
2020 * We don't support binding to any address if anyone is bound to
2021 * a specific address on the same port.
2022 */
3f446754 2023 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr))
e51060f0
SH		 2024 return -EADDRNOTAVAIL;
2025
2026 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
3f446754 2027 if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr))
e51060f0 2028 return -EADDRNOTAVAIL;
3cd96564 2029
e51060f0
SH		 2030 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
2031 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2032 return -EADDRINUSE;
2033 }
2034
2035 cma_bind_port(bind_list, id_priv);
2036 return 0;
2037}
2038
2039static int cma_get_port(struct rdma_id_private *id_priv)
2040{
2041 struct idr *ps;
2042 int ret;
2043
2044 switch (id_priv->id.ps) {
2045 case RDMA_PS_SDP:
2046 ps = &sdp_ps;
2047 break;
2048 case RDMA_PS_TCP:
2049 ps = &tcp_ps;
2050 break;
628e5f6d
SH		 2051 case RDMA_PS_UDP:
2052 ps = &udp_ps;
2053 break;
c8f6a362
SH		 2054 case RDMA_PS_IPOIB:
2055 ps = &ipoib_ps;
2056 break;
e51060f0
SH		 2057 default:
2058 return -EPROTONOSUPPORT;
2059 }
2060
2061 mutex_lock(&lock);
3f446754 2062 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2063 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2064 else
2065 ret = cma_use_port(ps, id_priv);
2066 mutex_unlock(&lock);
2067
2068 return ret;
2069}
2070
2071int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2072{
2073 struct rdma_id_private *id_priv;
2074 int ret;
2075
2076 if (addr->sa_family != AF_INET)
2077 return -EAFNOSUPPORT;
2078
2079 id_priv = container_of(id, struct rdma_id_private, id);
2080 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2081 return -EINVAL;
2082
2083 if (!cma_any_addr(addr)) {
2084 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2085 if (ret)
255d0c14
KK		 2086 goto err1;
2087
2088 mutex_lock(&lock);
2089 ret = cma_acquire_dev(id_priv);
2090 mutex_unlock(&lock);
2091 if (ret)
2092 goto err1;
e51060f0
SH		 2093 }
2094
2095 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2096 ret = cma_get_port(id_priv);
2097 if (ret)
255d0c14 2098 goto err2;
e51060f0
SH		 2099
2100 return 0;
255d0c14
KK		 2101err2:
2102 if (!cma_any_addr(addr)) {
2103 mutex_lock(&lock);
2104 cma_detach_from_dev(id_priv);
2105 mutex_unlock(&lock);
2106 }
2107err1:
e51060f0
SH		 2108 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2109 return ret;
2110}
2111EXPORT_SYMBOL(rdma_bind_addr);
2112
2113static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2114 struct rdma_route *route)
2115{
2116 struct sockaddr_in *src4, *dst4;
2117 struct cma_hdr *cma_hdr;
2118 struct sdp_hh *sdp_hdr;
2119
2120 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2121 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2122
2123 switch (ps) {
2124 case RDMA_PS_SDP:
2125 sdp_hdr = hdr;
2126 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2127 return -EINVAL;
2128 sdp_set_ip_ver(sdp_hdr, 4);
2129 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2130 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2131 sdp_hdr->port = src4->sin_port;
2132 break;
2133 default:
2134 cma_hdr = hdr;
2135 cma_hdr->cma_version = CMA_VERSION;
2136 cma_set_ip_ver(cma_hdr, 4);
2137 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2138 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2139 cma_hdr->port = src4->sin_port;
2140 break;
2141 }
2142 return 0;
2143}
2144
628e5f6d
SH		 2145static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2146 struct ib_cm_event *ib_event)
2147{
2148 struct rdma_id_private *id_priv = cm_id->context;
2149 struct rdma_cm_event event;
2150 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2151 int ret = 0;
2152
de910bd9 2153 if (cma_disable_callback(id_priv, CMA_CONNECT))
8aa08602 2154 return 0;
628e5f6d 2155
8aa08602 2156 memset(&event, 0, sizeof event);
628e5f6d
SH		 2157 switch (ib_event->event) {
2158 case IB_CM_SIDR_REQ_ERROR:
2159 event.event = RDMA_CM_EVENT_UNREACHABLE;
2160 event.status = -ETIMEDOUT;
2161 break;
2162 case IB_CM_SIDR_REP_RECEIVED:
2163 event.param.ud.private_data = ib_event->private_data;
2164 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2165 if (rep->status != IB_SIDR_SUCCESS) {
2166 event.event = RDMA_CM_EVENT_UNREACHABLE;
2167 event.status = ib_event->param.sidr_rep_rcvd.status;
2168 break;
2169 }
c8f6a362 2170 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2171 event.event = RDMA_CM_EVENT_UNREACHABLE;
2172 event.status = -EINVAL;
2173 break;
2174 }
2175 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2176 id_priv->id.route.path_rec,
2177 &event.param.ud.ah_attr);
2178 event.param.ud.qp_num = rep->qpn;
2179 event.param.ud.qkey = rep->qkey;
2180 event.event = RDMA_CM_EVENT_ESTABLISHED;
2181 event.status = 0;
2182 break;
2183 default:
468f2239 2184 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2185 ib_event->event);
2186 goto out;
2187 }
2188
2189 ret = id_priv->id.event_handler(&id_priv->id, &event);
2190 if (ret) {
2191 /* Destroy the CM ID by returning a non-zero value. */
2192 id_priv->cm_id.ib = NULL;
2193 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2194 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2195 rdma_destroy_id(&id_priv->id);
2196 return ret;
2197 }
2198out:
de910bd9 2199 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2200 return ret;
2201}
2202
2203static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2204 struct rdma_conn_param *conn_param)
2205{
2206 struct ib_cm_sidr_req_param req;
2207 struct rdma_route *route;
2208 int ret;
2209
2210 req.private_data_len = sizeof(struct cma_hdr) +
2211 conn_param->private_data_len;
2212 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2213 if (!req.private_data)
2214 return -ENOMEM;
2215
2216 if (conn_param->private_data && conn_param->private_data_len)
2217 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2218 conn_param->private_data, conn_param->private_data_len);
2219
2220 route = &id_priv->id.route;
2221 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2222 if (ret)
2223 goto out;
2224
2225 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2226 cma_sidr_rep_handler, id_priv);
2227 if (IS_ERR(id_priv->cm_id.ib)) {
2228 ret = PTR_ERR(id_priv->cm_id.ib);
2229 goto out;
2230 }
2231
2232 req.path = route->path_rec;
2233 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2234 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2235 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2236 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2237
2238 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2239 if (ret) {
2240 ib_destroy_cm_id(id_priv->cm_id.ib);
2241 id_priv->cm_id.ib = NULL;
2242 }
2243out:
2244 kfree(req.private_data);
2245 return ret;
2246}
2247
e51060f0
SH		 2248static int cma_connect_ib(struct rdma_id_private *id_priv,
2249 struct rdma_conn_param *conn_param)
2250{
2251 struct ib_cm_req_param req;
2252 struct rdma_route *route;
2253 void *private_data;
2254 int offset, ret;
2255
2256 memset(&req, 0, sizeof req);
2257 offset = cma_user_data_offset(id_priv->id.ps);
2258 req.private_data_len = offset + conn_param->private_data_len;
2259 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2260 if (!private_data)
2261 return -ENOMEM;
2262
2263 if (conn_param->private_data && conn_param->private_data_len)
2264 memcpy(private_data + offset, conn_param->private_data,
2265 conn_param->private_data_len);
2266
2267 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2268 id_priv);
2269 if (IS_ERR(id_priv->cm_id.ib)) {
2270 ret = PTR_ERR(id_priv->cm_id.ib);
2271 goto out;
2272 }
2273
2274 route = &id_priv->id.route;
2275 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2276 if (ret)
2277 goto out;
2278 req.private_data = private_data;
2279
2280 req.primary_path = &route->path_rec[0];
2281 if (route->num_paths == 2)
2282 req.alternate_path = &route->path_rec[1];
2283
2284 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2285 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2286 req.qp_num = id_priv->qp_num;
9b2e9c0c 2287 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2288 req.starting_psn = id_priv->seq_num;
2289 req.responder_resources = conn_param->responder_resources;
2290 req.initiator_depth = conn_param->initiator_depth;
2291 req.flow_control = conn_param->flow_control;
2292 req.retry_count = conn_param->retry_count;
2293 req.rnr_retry_count = conn_param->rnr_retry_count;
2294 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2295 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2296 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2297 req.srq = id_priv->srq ? 1 : 0;
2298
2299 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2300out:
675a027c
KK		 2301 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2302 ib_destroy_cm_id(id_priv->cm_id.ib);
2303 id_priv->cm_id.ib = NULL;
2304 }
2305
e51060f0
SH		 2306 kfree(private_data);
2307 return ret;
2308}
2309
07ebafba
TT		 2310static int cma_connect_iw(struct rdma_id_private *id_priv,
2311 struct rdma_conn_param *conn_param)
2312{
2313 struct iw_cm_id *cm_id;
2314 struct sockaddr_in* sin;
2315 int ret;
2316 struct iw_cm_conn_param iw_param;
2317
2318 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2319 if (IS_ERR(cm_id)) {
2320 ret = PTR_ERR(cm_id);
2321 goto out;
2322 }
2323
2324 id_priv->cm_id.iw = cm_id;
2325
2326 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2327 cm_id->local_addr = *sin;
2328
2329 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2330 cm_id->remote_addr = *sin;
2331
5851bb89 2332 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2333 if (ret)
2334 goto out;
07ebafba
TT		 2335
2336 iw_param.ord = conn_param->initiator_depth;
2337 iw_param.ird = conn_param->responder_resources;
2338 iw_param.private_data = conn_param->private_data;
2339 iw_param.private_data_len = conn_param->private_data_len;
2340 if (id_priv->id.qp)
2341 iw_param.qpn = id_priv->qp_num;
2342 else
2343 iw_param.qpn = conn_param->qp_num;
2344 ret = iw_cm_connect(cm_id, &iw_param);
2345out:
675a027c
KK		 2346 if (ret && !IS_ERR(cm_id)) {
2347 iw_destroy_cm_id(cm_id);
2348 id_priv->cm_id.iw = NULL;
2349 }
07ebafba
TT		 2350 return ret;
2351}
2352
e51060f0
SH		 2353int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2354{
2355 struct rdma_id_private *id_priv;
2356 int ret;
2357
2358 id_priv = container_of(id, struct rdma_id_private, id);
2359 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2360 return -EINVAL;
2361
2362 if (!id->qp) {
2363 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2364 id_priv->srq = conn_param->srq;
2365 }
2366
07ebafba
TT		 2367 switch (rdma_node_get_transport(id->device->node_type)) {
2368 case RDMA_TRANSPORT_IB:
c8f6a362 2369 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2370 ret = cma_resolve_ib_udp(id_priv, conn_param);
2371 else
2372 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2373 break;
07ebafba
TT		 2374 case RDMA_TRANSPORT_IWARP:
2375 ret = cma_connect_iw(id_priv, conn_param);
2376 break;
e51060f0
SH		 2377 default:
2378 ret = -ENOSYS;
2379 break;
2380 }
2381 if (ret)
2382 goto err;
2383
2384 return 0;
2385err:
2386 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2387 return ret;
2388}
2389EXPORT_SYMBOL(rdma_connect);
2390
2391static int cma_accept_ib(struct rdma_id_private *id_priv,
2392 struct rdma_conn_param *conn_param)
2393{
2394 struct ib_cm_rep_param rep;
5851bb89 2395 int ret;
0fe313b0 2396
5851bb89
SH		 2397 ret = cma_modify_qp_rtr(id_priv, conn_param);
2398 if (ret)
2399 goto out;
0fe313b0 2400
5851bb89
SH		 2401 ret = cma_modify_qp_rts(id_priv, conn_param);
2402 if (ret)
2403 goto out;
e51060f0
SH		 2404
2405 memset(&rep, 0, sizeof rep);
2406 rep.qp_num = id_priv->qp_num;
2407 rep.starting_psn = id_priv->seq_num;
2408 rep.private_data = conn_param->private_data;
2409 rep.private_data_len = conn_param->private_data_len;
2410 rep.responder_resources = conn_param->responder_resources;
2411 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2412 rep.failover_accepted = 0;
2413 rep.flow_control = conn_param->flow_control;
2414 rep.rnr_retry_count = conn_param->rnr_retry_count;
2415 rep.srq = id_priv->srq ? 1 : 0;
2416
0fe313b0
SH		 2417 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2418out:
2419 return ret;
e51060f0
SH		 2420}
2421
07ebafba
TT		 2422static int cma_accept_iw(struct rdma_id_private *id_priv,
2423 struct rdma_conn_param *conn_param)
2424{
2425 struct iw_cm_conn_param iw_param;
2426 int ret;
2427
5851bb89 2428 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2429 if (ret)
2430 return ret;
2431
2432 iw_param.ord = conn_param->initiator_depth;
2433 iw_param.ird = conn_param->responder_resources;
2434 iw_param.private_data = conn_param->private_data;
2435 iw_param.private_data_len = conn_param->private_data_len;
2436 if (id_priv->id.qp) {
2437 iw_param.qpn = id_priv->qp_num;
2438 } else
2439 iw_param.qpn = conn_param->qp_num;
2440
2441 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2442}
2443
628e5f6d
SH		 2444static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2445 enum ib_cm_sidr_status status,
2446 const void *private_data, int private_data_len)
2447{
2448 struct ib_cm_sidr_rep_param rep;
2449
2450 memset(&rep, 0, sizeof rep);
2451 rep.status = status;
2452 if (status == IB_SIDR_SUCCESS) {
2453 rep.qp_num = id_priv->qp_num;
c8f6a362 2454 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2455 }
2456 rep.private_data = private_data;
2457 rep.private_data_len = private_data_len;
2458
2459 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2460}
2461
e51060f0
SH		 2462int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
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 return -EINVAL;
2470
2471 if (!id->qp && conn_param) {
2472 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2473 id_priv->srq = conn_param->srq;
2474 }
2475
07ebafba
TT		 2476 switch (rdma_node_get_transport(id->device->node_type)) {
2477 case RDMA_TRANSPORT_IB:
c8f6a362 2478 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2479 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2480 conn_param->private_data,
2481 conn_param->private_data_len);
2482 else if (conn_param)
e51060f0
SH		 2483 ret = cma_accept_ib(id_priv, conn_param);
2484 else
2485 ret = cma_rep_recv(id_priv);
2486 break;
07ebafba
TT		 2487 case RDMA_TRANSPORT_IWARP:
2488 ret = cma_accept_iw(id_priv, conn_param);
2489 break;
e51060f0
SH		 2490 default:
2491 ret = -ENOSYS;
2492 break;
2493 }
2494
2495 if (ret)
2496 goto reject;
2497
2498 return 0;
2499reject:
c5483388 2500 cma_modify_qp_err(id_priv);
e51060f0
SH		 2501 rdma_reject(id, NULL, 0);
2502 return ret;
2503}
2504EXPORT_SYMBOL(rdma_accept);
2505
0fe313b0
SH		 2506int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2507{
2508 struct rdma_id_private *id_priv;
2509 int ret;
2510
2511 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2512 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2513 return -EINVAL;
2514
2515 switch (id->device->node_type) {
2516 case RDMA_NODE_IB_CA:
2517 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2518 break;
2519 default:
2520 ret = 0;
2521 break;
2522 }
2523 return ret;
2524}
2525EXPORT_SYMBOL(rdma_notify);
2526
e51060f0
SH		 2527int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2528 u8 private_data_len)
2529{
2530 struct rdma_id_private *id_priv;
2531 int ret;
2532
2533 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2534 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2535 return -EINVAL;
2536
07ebafba
TT		 2537 switch (rdma_node_get_transport(id->device->node_type)) {
2538 case RDMA_TRANSPORT_IB:
c8f6a362 2539 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2540 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2541 private_data, private_data_len);
2542 else
2543 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2544 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2545 0, private_data, private_data_len);
e51060f0 2546 break;
07ebafba
TT		 2547 case RDMA_TRANSPORT_IWARP:
2548 ret = iw_cm_reject(id_priv->cm_id.iw,
2549 private_data, private_data_len);
2550 break;
e51060f0
SH		 2551 default:
2552 ret = -ENOSYS;
2553 break;
2554 }
2555 return ret;
2556}
2557EXPORT_SYMBOL(rdma_reject);
2558
2559int rdma_disconnect(struct rdma_cm_id *id)
2560{
2561 struct rdma_id_private *id_priv;
2562 int ret;
2563
2564 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2565 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2566 return -EINVAL;
2567
07ebafba
TT		 2568 switch (rdma_node_get_transport(id->device->node_type)) {
2569 case RDMA_TRANSPORT_IB:
c5483388 2570 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2571 if (ret)
2572 goto out;
e51060f0
SH		 2573 /* Initiate or respond to a disconnect. */
2574 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2575 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2576 break;
07ebafba
TT		 2577 case RDMA_TRANSPORT_IWARP:
2578 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2579 break;
e51060f0 2580 default:
07ebafba 2581 ret = -EINVAL;
e51060f0
SH		 2582 break;
2583 }
2584out:
2585 return ret;
2586}
2587EXPORT_SYMBOL(rdma_disconnect);
2588
c8f6a362
SH		 2589static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2590{
2591 struct rdma_id_private *id_priv;
2592 struct cma_multicast *mc = multicast->context;
2593 struct rdma_cm_event event;
2594 int ret;
2595
2596 id_priv = mc->id_priv;
de910bd9
OG		 2597 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2598 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
8aa08602 2599 return 0;
c8f6a362 2600
c5483388 2601 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2602 if (!status && id_priv->id.qp)
2603 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2604 multicast->rec.mlid);
c5483388 2605 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2606
2607 memset(&event, 0, sizeof event);
2608 event.status = status;
2609 event.param.ud.private_data = mc->context;
2610 if (!status) {
2611 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2612 ib_init_ah_from_mcmember(id_priv->id.device,
2613 id_priv->id.port_num, &multicast->rec,
2614 &event.param.ud.ah_attr);
2615 event.param.ud.qp_num = 0xFFFFFF;
2616 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2617 } else
2618 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2619
2620 ret = id_priv->id.event_handler(&id_priv->id, &event);
2621 if (ret) {
2622 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2623 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2624 rdma_destroy_id(&id_priv->id);
2625 return 0;
2626 }
8aa08602 2627
de910bd9 2628 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2629 return 0;
2630}
2631
2632static void cma_set_mgid(struct rdma_id_private *id_priv,
2633 struct sockaddr *addr, union ib_gid *mgid)
2634{
2635 unsigned char mc_map[MAX_ADDR_LEN];
2636 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2637 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2638 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2639
2640 if (cma_any_addr(addr)) {
2641 memset(mgid, 0, sizeof *mgid);
2642 } else if ((addr->sa_family == AF_INET6) &&
2643 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) ==
2644 0xFF10A01B)) {
2645 /* IPv6 address is an SA assigned MGID. */
2646 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2647 } else {
a9e527e3 2648 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2649 if (id_priv->id.ps == RDMA_PS_UDP)
2650 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2651 *mgid = *(union ib_gid *) (mc_map + 4);
2652 }
2653}
2654
2655static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2656 struct cma_multicast *mc)
2657{
2658 struct ib_sa_mcmember_rec rec;
2659 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2660 ib_sa_comp_mask comp_mask;
2661 int ret;
2662
2663 ib_addr_get_mgid(dev_addr, &rec.mgid);
2664 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2665 &rec.mgid, &rec);
2666 if (ret)
2667 return ret;
2668
3f446754 2669 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 2670 if (id_priv->id.ps == RDMA_PS_UDP)
2671 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2672 ib_addr_get_sgid(dev_addr, &rec.port_gid);
2673 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2674 rec.join_state = 1;
2675
2676 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2677 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2678 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2679 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2680 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2681
2682 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2683 id_priv->id.port_num, &rec,
2684 comp_mask, GFP_KERNEL,
2685 cma_ib_mc_handler, mc);
2686 if (IS_ERR(mc->multicast.ib))
2687 return PTR_ERR(mc->multicast.ib);
2688
2689 return 0;
2690}
2691
2692int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2693 void *context)
2694{
2695 struct rdma_id_private *id_priv;
2696 struct cma_multicast *mc;
2697 int ret;
2698
2699 id_priv = container_of(id, struct rdma_id_private, id);
2700 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2701 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2702 return -EINVAL;
2703
2704 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2705 if (!mc)
2706 return -ENOMEM;
2707
2708 memcpy(&mc->addr, addr, ip_addr_size(addr));
2709 mc->context = context;
2710 mc->id_priv = id_priv;
2711
2712 spin_lock(&id_priv->lock);
2713 list_add(&mc->list, &id_priv->mc_list);
2714 spin_unlock(&id_priv->lock);
2715
2716 switch (rdma_node_get_transport(id->device->node_type)) {
2717 case RDMA_TRANSPORT_IB:
2718 ret = cma_join_ib_multicast(id_priv, mc);
2719 break;
2720 default:
2721 ret = -ENOSYS;
2722 break;
2723 }
2724
2725 if (ret) {
2726 spin_lock_irq(&id_priv->lock);
2727 list_del(&mc->list);
2728 spin_unlock_irq(&id_priv->lock);
2729 kfree(mc);
2730 }
2731 return ret;
2732}
2733EXPORT_SYMBOL(rdma_join_multicast);
2734
2735void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2736{
2737 struct rdma_id_private *id_priv;
2738 struct cma_multicast *mc;
2739
2740 id_priv = container_of(id, struct rdma_id_private, id);
2741 spin_lock_irq(&id_priv->lock);
2742 list_for_each_entry(mc, &id_priv->mc_list, list) {
2743 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2744 list_del(&mc->list);
2745 spin_unlock_irq(&id_priv->lock);
2746
2747 if (id->qp)
2748 ib_detach_mcast(id->qp,
2749 &mc->multicast.ib->rec.mgid,
2750 mc->multicast.ib->rec.mlid);
2751 ib_sa_free_multicast(mc->multicast.ib);
2752 kfree(mc);
2753 return;
2754 }
2755 }
2756 spin_unlock_irq(&id_priv->lock);
2757}
2758EXPORT_SYMBOL(rdma_leave_multicast);
2759
dd5bdff8
OG		 2760static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
2761{
2762 struct rdma_dev_addr *dev_addr;
2763 struct cma_ndev_work *work;
2764
2765 dev_addr = &id_priv->id.route.addr.dev_addr;
2766
2767 if ((dev_addr->src_dev == ndev) &&
2768 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
2769 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
2770 ndev->name, &id_priv->id);
2771 work = kzalloc(sizeof *work, GFP_KERNEL);
2772 if (!work)
2773 return -ENOMEM;
2774
2775 INIT_WORK(&work->work, cma_ndev_work_handler);
2776 work->id = id_priv;
2777 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
2778 atomic_inc(&id_priv->refcount);
2779 queue_work(cma_wq, &work->work);
2780 }
2781
2782 return 0;
2783}
2784
2785static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
2786 void *ctx)
2787{
2788 struct net_device *ndev = (struct net_device *)ctx;
2789 struct cma_device *cma_dev;
2790 struct rdma_id_private *id_priv;
2791 int ret = NOTIFY_DONE;
2792
2793 if (dev_net(ndev) != &init_net)
2794 return NOTIFY_DONE;
2795
2796 if (event != NETDEV_BONDING_FAILOVER)
2797 return NOTIFY_DONE;
2798
2799 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
2800 return NOTIFY_DONE;
2801
2802 mutex_lock(&lock);
2803 list_for_each_entry(cma_dev, &dev_list, list)
2804 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
2805 ret = cma_netdev_change(ndev, id_priv);
2806 if (ret)
2807 goto out;
2808 }
2809
2810out:
2811 mutex_unlock(&lock);
2812 return ret;
2813}
2814
2815static struct notifier_block cma_nb = {
2816 .notifier_call = cma_netdev_callback
2817};
2818
e51060f0
SH		 2819static void cma_add_one(struct ib_device *device)
2820{
2821 struct cma_device *cma_dev;
2822 struct rdma_id_private *id_priv;
2823
2824 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2825 if (!cma_dev)
2826 return;
2827
2828 cma_dev->device = device;
e51060f0
SH		 2829
2830 init_completion(&cma_dev->comp);
2831 atomic_set(&cma_dev->refcount, 1);
2832 INIT_LIST_HEAD(&cma_dev->id_list);
2833 ib_set_client_data(device, &cma_client, cma_dev);
2834
2835 mutex_lock(&lock);
2836 list_add_tail(&cma_dev->list, &dev_list);
2837 list_for_each_entry(id_priv, &listen_any_list, list)
2838 cma_listen_on_dev(id_priv, cma_dev);
2839 mutex_unlock(&lock);
e51060f0
SH		 2840}
2841
2842static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2843{
a1b1b61f 2844 struct rdma_cm_event event;
e51060f0 2845 enum cma_state state;
de910bd9 2846 int ret = 0;
e51060f0
SH		 2847
2848 /* Record that we want to remove the device */
2849 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2850 if (state == CMA_DESTROYING)
2851 return 0;
2852
2853 cma_cancel_operation(id_priv, state);
de910bd9 2854 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 2855
2856 /* Check for destruction from another callback. */
2857 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
de910bd9 2858 goto out;
e51060f0 2859
a1b1b61f
SH		 2860 memset(&event, 0, sizeof event);
2861 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 2862 ret = id_priv->id.event_handler(&id_priv->id, &event);
2863out:
2864 mutex_unlock(&id_priv->handler_mutex);
2865 return ret;
e51060f0
SH		 2866}
2867
2868static void cma_process_remove(struct cma_device *cma_dev)
2869{
e51060f0
SH		 2870 struct rdma_id_private *id_priv;
2871 int ret;
2872
e51060f0
SH		 2873 mutex_lock(&lock);
2874 while (!list_empty(&cma_dev->id_list)) {
2875 id_priv = list_entry(cma_dev->id_list.next,
2876 struct rdma_id_private, list);
2877
d02d1f53 2878 list_del(&id_priv->listen_list);
94de178a 2879 list_del_init(&id_priv->list);
e51060f0
SH		 2880 atomic_inc(&id_priv->refcount);
2881 mutex_unlock(&lock);
2882
d02d1f53 2883 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 2884 cma_deref_id(id_priv);
2885 if (ret)
2886 rdma_destroy_id(&id_priv->id);
2887
2888 mutex_lock(&lock);
2889 }
2890 mutex_unlock(&lock);
2891
2892 cma_deref_dev(cma_dev);
2893 wait_for_completion(&cma_dev->comp);
2894}
2895
2896static void cma_remove_one(struct ib_device *device)
2897{
2898 struct cma_device *cma_dev;
2899
2900 cma_dev = ib_get_client_data(device, &cma_client);
2901 if (!cma_dev)
2902 return;
2903
2904 mutex_lock(&lock);
2905 list_del(&cma_dev->list);
2906 mutex_unlock(&lock);
2907
2908 cma_process_remove(cma_dev);
2909 kfree(cma_dev);
2910}
2911
2912static int cma_init(void)
2913{
a25de534 2914 int ret, low, high, remaining;
e51060f0 2915
aedec080 2916 get_random_bytes(&next_port, sizeof next_port);
227b60f5 2917 inet_get_local_port_range(&low, &high);
a25de534
AA		 2918 remaining = (high - low) + 1;
2919 next_port = ((unsigned int) next_port % remaining) + low;
227b60f5 2920
c7f743a6 2921 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 2922 if (!cma_wq)
2923 return -ENOMEM;
2924
c1a0b23b 2925 ib_sa_register_client(&sa_client);
7a118df3 2926 rdma_addr_register_client(&addr_client);
dd5bdff8 2927 register_netdevice_notifier(&cma_nb);
c1a0b23b 2928
e51060f0
SH		 2929 ret = ib_register_client(&cma_client);
2930 if (ret)
2931 goto err;
2932 return 0;
2933
2934err:
dd5bdff8 2935 unregister_netdevice_notifier(&cma_nb);
7a118df3 2936 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2937 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2938 destroy_workqueue(cma_wq);
2939 return ret;
2940}
2941
2942static void cma_cleanup(void)
2943{
2944 ib_unregister_client(&cma_client);
dd5bdff8 2945 unregister_netdevice_notifier(&cma_nb);
7a118df3 2946 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2947 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2948 destroy_workqueue(cma_wq);
2949 idr_destroy(&sdp_ps);
2950 idr_destroy(&tcp_ps);
628e5f6d 2951 idr_destroy(&udp_ps);
c8f6a362 2952 idr_destroy(&ipoib_ps);
e51060f0
SH		 2953}
2954
2955module_init(cma_init);
2956module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)