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IB/mad: IBoE supports only QP1 (no QP0)
[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>
5a0e3ad6 43#include <linux/slab.h>
e51060f0
SH		 44
45#include <net/tcp.h>
1f5175ad 46#include <net/ipv6.h>
e51060f0
SH		 47
48#include <rdma/rdma_cm.h>
49#include <rdma/rdma_cm_ib.h>
50#include <rdma/ib_cache.h>
51#include <rdma/ib_cm.h>
52#include <rdma/ib_sa.h>
07ebafba 53#include <rdma/iw_cm.h>
e51060f0
SH		 54
55MODULE_AUTHOR("Sean Hefty");
56MODULE_DESCRIPTION("Generic RDMA CM Agent");
57MODULE_LICENSE("Dual BSD/GPL");
58
59#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 60#define CMA_MAX_CM_RETRIES 15
dcb3f974 61#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
e51060f0
SH		 62
63static void cma_add_one(struct ib_device *device);
64static void cma_remove_one(struct ib_device *device);
65
66static struct ib_client cma_client = {
67 .name = "cma",
68 .add = cma_add_one,
69 .remove = cma_remove_one
70};
71
c1a0b23b 72static struct ib_sa_client sa_client;
7a118df3 73static struct rdma_addr_client addr_client;
e51060f0
SH		 74static LIST_HEAD(dev_list);
75static LIST_HEAD(listen_any_list);
76static DEFINE_MUTEX(lock);
77static struct workqueue_struct *cma_wq;
78static DEFINE_IDR(sdp_ps);
79static DEFINE_IDR(tcp_ps);
628e5f6d 80static DEFINE_IDR(udp_ps);
c8f6a362 81static DEFINE_IDR(ipoib_ps);
e51060f0
SH		 82
83struct cma_device {
84 struct list_head list;
85 struct ib_device *device;
e51060f0
SH		 86 struct completion comp;
87 atomic_t refcount;
88 struct list_head id_list;
89};
90
91enum cma_state {
92 CMA_IDLE,
93 CMA_ADDR_QUERY,
94 CMA_ADDR_RESOLVED,
95 CMA_ROUTE_QUERY,
96 CMA_ROUTE_RESOLVED,
97 CMA_CONNECT,
98 CMA_DISCONNECT,
99 CMA_ADDR_BOUND,
100 CMA_LISTEN,
101 CMA_DEVICE_REMOVAL,
102 CMA_DESTROYING
103};
104
105struct rdma_bind_list {
106 struct idr *ps;
107 struct hlist_head owners;
108 unsigned short port;
109};
110
111/*
112 * Device removal can occur at anytime, so we need extra handling to
113 * serialize notifying the user of device removal with other callbacks.
114 * We do this by disabling removal notification while a callback is in process,
115 * and reporting it after the callback completes.
116 */
117struct rdma_id_private {
118 struct rdma_cm_id id;
119
120 struct rdma_bind_list *bind_list;
121 struct hlist_node node;
d02d1f53
SH		 122 struct list_head list; /* listen_any_list or cma_device.list */
123 struct list_head listen_list; /* per device listens */
e51060f0 124 struct cma_device *cma_dev;
c8f6a362 125 struct list_head mc_list;
e51060f0 126
d02d1f53 127 int internal_id;
e51060f0
SH		 128 enum cma_state state;
129 spinlock_t lock;
c5483388
SH		 130 struct mutex qp_mutex;
131
e51060f0
SH		 132 struct completion comp;
133 atomic_t refcount;
de910bd9 134 struct mutex handler_mutex;
e51060f0
SH		 135
136 int backlog;
137 int timeout_ms;
138 struct ib_sa_query *query;
139 int query_id;
140 union {
141 struct ib_cm_id *ib;
07ebafba 142 struct iw_cm_id *iw;
e51060f0
SH		 143 } cm_id;
144
145 u32 seq_num;
c8f6a362 146 u32 qkey;
e51060f0 147 u32 qp_num;
e51060f0 148 u8 srq;
a81c994d 149 u8 tos;
e51060f0
SH		 150};
151
c8f6a362
SH		 152struct cma_multicast {
153 struct rdma_id_private *id_priv;
154 union {
155 struct ib_sa_multicast *ib;
156 } multicast;
157 struct list_head list;
158 void *context;
3f446754 159 struct sockaddr_storage addr;
c8f6a362
SH		 160};
161
e51060f0
SH		 162struct cma_work {
163 struct work_struct work;
164 struct rdma_id_private *id;
165 enum cma_state old_state;
166 enum cma_state new_state;
167 struct rdma_cm_event event;
168};
169
dd5bdff8
OG		 170struct cma_ndev_work {
171 struct work_struct work;
172 struct rdma_id_private *id;
173 struct rdma_cm_event event;
174};
175
e51060f0
SH		 176union cma_ip_addr {
177 struct in6_addr ip6;
178 struct {
1b90c137
AV		 179 __be32 pad[3];
180 __be32 addr;
e51060f0
SH		 181 } ip4;
182};
183
184struct cma_hdr {
185 u8 cma_version;
186 u8 ip_version; /* IP version: 7:4 */
1b90c137 187 __be16 port;
e51060f0
SH		 188 union cma_ip_addr src_addr;
189 union cma_ip_addr dst_addr;
190};
191
192struct sdp_hh {
193 u8 bsdh[16];
194 u8 sdp_version; /* Major version: 7:4 */
195 u8 ip_version; /* IP version: 7:4 */
196 u8 sdp_specific1[10];
1b90c137
AV		 197 __be16 port;
198 __be16 sdp_specific2;
e51060f0
SH		 199 union cma_ip_addr src_addr;
200 union cma_ip_addr dst_addr;
201};
202
203struct sdp_hah {
204 u8 bsdh[16];
205 u8 sdp_version;
206};
207
208#define CMA_VERSION 0x00
209#define SDP_MAJ_VERSION 0x2
210
211static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
212{
213 unsigned long flags;
214 int ret;
215
216 spin_lock_irqsave(&id_priv->lock, flags);
217 ret = (id_priv->state == comp);
218 spin_unlock_irqrestore(&id_priv->lock, flags);
219 return ret;
220}
221
222static int cma_comp_exch(struct rdma_id_private *id_priv,
223 enum cma_state comp, enum cma_state exch)
224{
225 unsigned long flags;
226 int ret;
227
228 spin_lock_irqsave(&id_priv->lock, flags);
229 if ((ret = (id_priv->state == comp)))
230 id_priv->state = exch;
231 spin_unlock_irqrestore(&id_priv->lock, flags);
232 return ret;
233}
234
235static enum cma_state cma_exch(struct rdma_id_private *id_priv,
236 enum cma_state exch)
237{
238 unsigned long flags;
239 enum cma_state old;
240
241 spin_lock_irqsave(&id_priv->lock, flags);
242 old = id_priv->state;
243 id_priv->state = exch;
244 spin_unlock_irqrestore(&id_priv->lock, flags);
245 return old;
246}
247
248static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
249{
250 return hdr->ip_version >> 4;
251}
252
253static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
254{
255 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
256}
257
258static inline u8 sdp_get_majv(u8 sdp_version)
259{
260 return sdp_version >> 4;
261}
262
263static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
264{
265 return hh->ip_version >> 4;
266}
267
268static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
269{
270 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
271}
272
c8f6a362
SH		 273static inline int cma_is_ud_ps(enum rdma_port_space ps)
274{
275 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
276}
277
e51060f0
SH		 278static void cma_attach_to_dev(struct rdma_id_private *id_priv,
279 struct cma_device *cma_dev)
280{
281 atomic_inc(&cma_dev->refcount);
282 id_priv->cma_dev = cma_dev;
283 id_priv->id.device = cma_dev->device;
284 list_add_tail(&id_priv->list, &cma_dev->id_list);
285}
286
287static inline void cma_deref_dev(struct cma_device *cma_dev)
288{
289 if (atomic_dec_and_test(&cma_dev->refcount))
290 complete(&cma_dev->comp);
291}
292
293static void cma_detach_from_dev(struct rdma_id_private *id_priv)
294{
295 list_del(&id_priv->list);
296 cma_deref_dev(id_priv->cma_dev);
297 id_priv->cma_dev = NULL;
298}
299
d2ca39f2 300static int cma_set_qkey(struct rdma_id_private *id_priv)
c8f6a362
SH		 301{
302 struct ib_sa_mcmember_rec rec;
303 int ret = 0;
304
d2ca39f2
YE		 305 if (id_priv->qkey)
306 return 0;
307
308 switch (id_priv->id.ps) {
c8f6a362 309 case RDMA_PS_UDP:
d2ca39f2 310 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 311 break;
312 case RDMA_PS_IPOIB:
d2ca39f2
YE		 313 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
314 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
315 id_priv->id.port_num, &rec.mgid,
316 &rec);
317 if (!ret)
318 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 319 break;
320 default:
321 break;
322 }
323 return ret;
324}
325
07ebafba 326static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 327{
c8f6a362 328 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 329 struct cma_device *cma_dev;
f0ee3404 330 union ib_gid gid;
e51060f0
SH		 331 int ret = -ENODEV;
332
6f8372b6 333 rdma_addr_get_sgid(dev_addr, &gid);
e51060f0 334 list_for_each_entry(cma_dev, &dev_list, list) {
f0ee3404 335 ret = ib_find_cached_gid(cma_dev->device, &gid,
e51060f0
SH		 336 &id_priv->id.port_num, NULL);
337 if (!ret) {
d2ca39f2 338 cma_attach_to_dev(id_priv, cma_dev);
e51060f0
SH		 339 break;
340 }
341 }
e51060f0
SH		 342 return ret;
343}
344
e51060f0
SH		 345static void cma_deref_id(struct rdma_id_private *id_priv)
346{
347 if (atomic_dec_and_test(&id_priv->refcount))
348 complete(&id_priv->comp);
349}
350
de910bd9 351static int cma_disable_callback(struct rdma_id_private *id_priv,
8aa08602
SH		 352 enum cma_state state)
353{
de910bd9
OG		 354 mutex_lock(&id_priv->handler_mutex);
355 if (id_priv->state != state) {
356 mutex_unlock(&id_priv->handler_mutex);
357 return -EINVAL;
358 }
359 return 0;
e51060f0
SH		 360}
361
6c719f5c
SH		 362static int cma_has_cm_dev(struct rdma_id_private *id_priv)
363{
364 return (id_priv->id.device && id_priv->cm_id.ib);
365}
366
e51060f0
SH		 367struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
368 void *context, enum rdma_port_space ps)
369{
370 struct rdma_id_private *id_priv;
371
372 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
373 if (!id_priv)
374 return ERR_PTR(-ENOMEM);
375
376 id_priv->state = CMA_IDLE;
377 id_priv->id.context = context;
378 id_priv->id.event_handler = event_handler;
379 id_priv->id.ps = ps;
380 spin_lock_init(&id_priv->lock);
c5483388 381 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 382 init_completion(&id_priv->comp);
383 atomic_set(&id_priv->refcount, 1);
de910bd9 384 mutex_init(&id_priv->handler_mutex);
e51060f0 385 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 386 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 387 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
388
389 return &id_priv->id;
390}
391EXPORT_SYMBOL(rdma_create_id);
392
c8f6a362 393static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 394{
395 struct ib_qp_attr qp_attr;
c8f6a362 396 int qp_attr_mask, ret;
e51060f0 397
c8f6a362
SH		 398 qp_attr.qp_state = IB_QPS_INIT;
399 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 400 if (ret)
401 return ret;
402
c8f6a362
SH		 403 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
404 if (ret)
405 return ret;
406
407 qp_attr.qp_state = IB_QPS_RTR;
408 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
409 if (ret)
410 return ret;
411
412 qp_attr.qp_state = IB_QPS_RTS;
413 qp_attr.sq_psn = 0;
414 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
415
416 return ret;
e51060f0
SH		 417}
418
c8f6a362 419static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 420{
421 struct ib_qp_attr qp_attr;
c8f6a362 422 int qp_attr_mask, ret;
07ebafba
TT		 423
424 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 425 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
426 if (ret)
427 return ret;
07ebafba 428
c8f6a362 429 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 430}
431
e51060f0
SH		 432int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
433 struct ib_qp_init_attr *qp_init_attr)
434{
435 struct rdma_id_private *id_priv;
436 struct ib_qp *qp;
437 int ret;
438
439 id_priv = container_of(id, struct rdma_id_private, id);
440 if (id->device != pd->device)
441 return -EINVAL;
442
443 qp = ib_create_qp(pd, qp_init_attr);
444 if (IS_ERR(qp))
445 return PTR_ERR(qp);
446
c8f6a362
SH		 447 if (cma_is_ud_ps(id_priv->id.ps))
448 ret = cma_init_ud_qp(id_priv, qp);
449 else
450 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 451 if (ret)
452 goto err;
453
454 id->qp = qp;
455 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 456 id_priv->srq = (qp->srq != NULL);
457 return 0;
458err:
459 ib_destroy_qp(qp);
460 return ret;
461}
462EXPORT_SYMBOL(rdma_create_qp);
463
464void rdma_destroy_qp(struct rdma_cm_id *id)
465{
c5483388
SH		 466 struct rdma_id_private *id_priv;
467
468 id_priv = container_of(id, struct rdma_id_private, id);
469 mutex_lock(&id_priv->qp_mutex);
470 ib_destroy_qp(id_priv->id.qp);
471 id_priv->id.qp = NULL;
472 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 473}
474EXPORT_SYMBOL(rdma_destroy_qp);
475
5851bb89
SH		 476static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
477 struct rdma_conn_param *conn_param)
e51060f0
SH		 478{
479 struct ib_qp_attr qp_attr;
480 int qp_attr_mask, ret;
481
c5483388
SH		 482 mutex_lock(&id_priv->qp_mutex);
483 if (!id_priv->id.qp) {
484 ret = 0;
485 goto out;
486 }
e51060f0
SH		 487
488 /* Need to update QP attributes from default values. */
489 qp_attr.qp_state = IB_QPS_INIT;
c5483388 490 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 491 if (ret)
c5483388 492 goto out;
e51060f0 493
c5483388 494 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 495 if (ret)
c5483388 496 goto out;
e51060f0
SH		 497
498 qp_attr.qp_state = IB_QPS_RTR;
c5483388 499 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 500 if (ret)
c5483388 501 goto out;
e51060f0 502
5851bb89
SH		 503 if (conn_param)
504 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 505 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
506out:
507 mutex_unlock(&id_priv->qp_mutex);
508 return ret;
e51060f0
SH		 509}
510
5851bb89
SH		 511static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
512 struct rdma_conn_param *conn_param)
e51060f0
SH		 513{
514 struct ib_qp_attr qp_attr;
515 int qp_attr_mask, ret;
516
c5483388
SH		 517 mutex_lock(&id_priv->qp_mutex);
518 if (!id_priv->id.qp) {
519 ret = 0;
520 goto out;
521 }
e51060f0
SH		 522
523 qp_attr.qp_state = IB_QPS_RTS;
c5483388 524 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 525 if (ret)
c5483388 526 goto out;
e51060f0 527
5851bb89
SH		 528 if (conn_param)
529 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 530 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
531out:
532 mutex_unlock(&id_priv->qp_mutex);
533 return ret;
e51060f0
SH		 534}
535
c5483388 536static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 537{
538 struct ib_qp_attr qp_attr;
c5483388 539 int ret;
e51060f0 540
c5483388
SH		 541 mutex_lock(&id_priv->qp_mutex);
542 if (!id_priv->id.qp) {
543 ret = 0;
544 goto out;
545 }
e51060f0
SH		 546
547 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 548 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
549out:
550 mutex_unlock(&id_priv->qp_mutex);
551 return ret;
e51060f0
SH		 552}
553
c8f6a362
SH		 554static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
555 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
556{
557 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
558 int ret;
559
560 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
561 ib_addr_get_pkey(dev_addr),
562 &qp_attr->pkey_index);
563 if (ret)
564 return ret;
565
566 qp_attr->port_num = id_priv->id.port_num;
567 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
568
569 if (cma_is_ud_ps(id_priv->id.ps)) {
d2ca39f2
YE		 570 ret = cma_set_qkey(id_priv);
571 if (ret)
572 return ret;
573
c8f6a362
SH		 574 qp_attr->qkey = id_priv->qkey;
575 *qp_attr_mask |= IB_QP_QKEY;
576 } else {
577 qp_attr->qp_access_flags = 0;
578 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
579 }
580 return 0;
581}
582
e51060f0
SH		 583int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
584 int *qp_attr_mask)
585{
586 struct rdma_id_private *id_priv;
c8f6a362 587 int ret = 0;
e51060f0
SH		 588
589 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 590 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
591 case RDMA_TRANSPORT_IB:
c8f6a362
SH		 592 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
593 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
594 else
595 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
596 qp_attr_mask);
e51060f0
SH		 597 if (qp_attr->qp_state == IB_QPS_RTR)
598 qp_attr->rq_psn = id_priv->seq_num;
599 break;
07ebafba 600 case RDMA_TRANSPORT_IWARP:
c8f6a362 601 if (!id_priv->cm_id.iw) {
8f076531 602 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 603 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
604 } else
605 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
606 qp_attr_mask);
07ebafba 607 break;
e51060f0
SH		 608 default:
609 ret = -ENOSYS;
610 break;
611 }
612
613 return ret;
614}
615EXPORT_SYMBOL(rdma_init_qp_attr);
616
617static inline int cma_zero_addr(struct sockaddr *addr)
618{
619 struct in6_addr *ip6;
620
621 if (addr->sa_family == AF_INET)
6360a02a
JP		 622 return ipv4_is_zeronet(
623 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
e51060f0
SH		 624 else {
625 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
626 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 627 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 628 }
629}
630
631static inline int cma_loopback_addr(struct sockaddr *addr)
632{
1f5175ad
AS		 633 if (addr->sa_family == AF_INET)
634 return ipv4_is_loopback(
635 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
636 else
637 return ipv6_addr_loopback(
638 &((struct sockaddr_in6 *) addr)->sin6_addr);
e51060f0
SH		 639}
640
641static inline int cma_any_addr(struct sockaddr *addr)
642{
643 return cma_zero_addr(addr) || cma_loopback_addr(addr);
644}
645
628e5f6d
SH		 646static inline __be16 cma_port(struct sockaddr *addr)
647{
648 if (addr->sa_family == AF_INET)
649 return ((struct sockaddr_in *) addr)->sin_port;
650 else
651 return ((struct sockaddr_in6 *) addr)->sin6_port;
652}
653
e51060f0
SH		 654static inline int cma_any_port(struct sockaddr *addr)
655{
628e5f6d 656 return !cma_port(addr);
e51060f0
SH		 657}
658
659static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
1b90c137 660 u8 *ip_ver, __be16 *port,
e51060f0
SH		 661 union cma_ip_addr **src, union cma_ip_addr **dst)
662{
663 switch (ps) {
664 case RDMA_PS_SDP:
665 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
666 SDP_MAJ_VERSION)
667 return -EINVAL;
668
669 *ip_ver = sdp_get_ip_ver(hdr);
670 *port = ((struct sdp_hh *) hdr)->port;
671 *src = &((struct sdp_hh *) hdr)->src_addr;
672 *dst = &((struct sdp_hh *) hdr)->dst_addr;
673 break;
674 default:
675 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
676 return -EINVAL;
677
678 *ip_ver = cma_get_ip_ver(hdr);
679 *port = ((struct cma_hdr *) hdr)->port;
680 *src = &((struct cma_hdr *) hdr)->src_addr;
681 *dst = &((struct cma_hdr *) hdr)->dst_addr;
682 break;
683 }
684
685 if (*ip_ver != 4 && *ip_ver != 6)
686 return -EINVAL;
687 return 0;
688}
689
690static void cma_save_net_info(struct rdma_addr *addr,
691 struct rdma_addr *listen_addr,
1b90c137 692 u8 ip_ver, __be16 port,
e51060f0
SH		 693 union cma_ip_addr *src, union cma_ip_addr *dst)
694{
695 struct sockaddr_in *listen4, *ip4;
696 struct sockaddr_in6 *listen6, *ip6;
697
698 switch (ip_ver) {
699 case 4:
700 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
701 ip4 = (struct sockaddr_in *) &addr->src_addr;
702 ip4->sin_family = listen4->sin_family;
703 ip4->sin_addr.s_addr = dst->ip4.addr;
704 ip4->sin_port = listen4->sin_port;
705
706 ip4 = (struct sockaddr_in *) &addr->dst_addr;
707 ip4->sin_family = listen4->sin_family;
708 ip4->sin_addr.s_addr = src->ip4.addr;
709 ip4->sin_port = port;
710 break;
711 case 6:
712 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
713 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
714 ip6->sin6_family = listen6->sin6_family;
715 ip6->sin6_addr = dst->ip6;
716 ip6->sin6_port = listen6->sin6_port;
717
718 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
719 ip6->sin6_family = listen6->sin6_family;
720 ip6->sin6_addr = src->ip6;
721 ip6->sin6_port = port;
722 break;
723 default:
724 break;
725 }
726}
727
728static inline int cma_user_data_offset(enum rdma_port_space ps)
729{
730 switch (ps) {
731 case RDMA_PS_SDP:
732 return 0;
733 default:
734 return sizeof(struct cma_hdr);
735 }
736}
737
e51060f0
SH		 738static void cma_cancel_route(struct rdma_id_private *id_priv)
739{
07ebafba
TT		 740 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
741 case RDMA_TRANSPORT_IB:
e51060f0
SH		 742 if (id_priv->query)
743 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
744 break;
745 default:
746 break;
747 }
748}
749
e51060f0
SH		 750static void cma_cancel_listens(struct rdma_id_private *id_priv)
751{
752 struct rdma_id_private *dev_id_priv;
753
d02d1f53
SH		 754 /*
755 * Remove from listen_any_list to prevent added devices from spawning
756 * additional listen requests.
757 */
e51060f0
SH		 758 mutex_lock(&lock);
759 list_del(&id_priv->list);
760
761 while (!list_empty(&id_priv->listen_list)) {
762 dev_id_priv = list_entry(id_priv->listen_list.next,
763 struct rdma_id_private, listen_list);
d02d1f53
SH		 764 /* sync with device removal to avoid duplicate destruction */
765 list_del_init(&dev_id_priv->list);
766 list_del(&dev_id_priv->listen_list);
767 mutex_unlock(&lock);
768
769 rdma_destroy_id(&dev_id_priv->id);
770 mutex_lock(&lock);
e51060f0
SH		 771 }
772 mutex_unlock(&lock);
773}
774
775static void cma_cancel_operation(struct rdma_id_private *id_priv,
776 enum cma_state state)
777{
778 switch (state) {
779 case CMA_ADDR_QUERY:
780 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
781 break;
782 case CMA_ROUTE_QUERY:
783 cma_cancel_route(id_priv);
784 break;
785 case CMA_LISTEN:
3f446754
RD		 786 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
787 && !id_priv->cma_dev)
e51060f0
SH		 788 cma_cancel_listens(id_priv);
789 break;
790 default:
791 break;
792 }
793}
794
795static void cma_release_port(struct rdma_id_private *id_priv)
796{
797 struct rdma_bind_list *bind_list = id_priv->bind_list;
798
799 if (!bind_list)
800 return;
801
802 mutex_lock(&lock);
803 hlist_del(&id_priv->node);
804 if (hlist_empty(&bind_list->owners)) {
805 idr_remove(bind_list->ps, bind_list->port);
806 kfree(bind_list);
807 }
808 mutex_unlock(&lock);
809}
810
c8f6a362
SH		 811static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
812{
813 struct cma_multicast *mc;
814
815 while (!list_empty(&id_priv->mc_list)) {
816 mc = container_of(id_priv->mc_list.next,
817 struct cma_multicast, list);
818 list_del(&mc->list);
819 ib_sa_free_multicast(mc->multicast.ib);
820 kfree(mc);
821 }
822}
823
e51060f0
SH		 824void rdma_destroy_id(struct rdma_cm_id *id)
825{
826 struct rdma_id_private *id_priv;
827 enum cma_state state;
828
829 id_priv = container_of(id, struct rdma_id_private, id);
830 state = cma_exch(id_priv, CMA_DESTROYING);
831 cma_cancel_operation(id_priv, state);
832
61a73c70 833 mutex_lock(&lock);
e51060f0 834 if (id_priv->cma_dev) {
61a73c70 835 mutex_unlock(&lock);
07ebafba
TT		 836 switch (rdma_node_get_transport(id->device->node_type)) {
837 case RDMA_TRANSPORT_IB:
3cd96564 838 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 839 ib_destroy_cm_id(id_priv->cm_id.ib);
840 break;
07ebafba
TT		 841 case RDMA_TRANSPORT_IWARP:
842 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
843 iw_destroy_cm_id(id_priv->cm_id.iw);
844 break;
e51060f0
SH		 845 default:
846 break;
847 }
c8f6a362 848 cma_leave_mc_groups(id_priv);
3cd96564 849 mutex_lock(&lock);
e51060f0 850 cma_detach_from_dev(id_priv);
e51060f0 851 }
61a73c70 852 mutex_unlock(&lock);
e51060f0
SH		 853
854 cma_release_port(id_priv);
855 cma_deref_id(id_priv);
856 wait_for_completion(&id_priv->comp);
857
d02d1f53
SH		 858 if (id_priv->internal_id)
859 cma_deref_id(id_priv->id.context);
860
e51060f0
SH		 861 kfree(id_priv->id.route.path_rec);
862 kfree(id_priv);
863}
864EXPORT_SYMBOL(rdma_destroy_id);
865
866static int cma_rep_recv(struct rdma_id_private *id_priv)
867{
868 int ret;
869
5851bb89 870 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 871 if (ret)
872 goto reject;
873
5851bb89 874 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 875 if (ret)
876 goto reject;
877
878 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
879 if (ret)
880 goto reject;
881
882 return 0;
883reject:
c5483388 884 cma_modify_qp_err(id_priv);
e51060f0
SH		 885 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
886 NULL, 0, NULL, 0);
887 return ret;
888}
889
890static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
891{
892 if (id_priv->id.ps == RDMA_PS_SDP &&
893 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
894 SDP_MAJ_VERSION)
895 return -EINVAL;
896
897 return 0;
898}
899
a1b1b61f
SH		 900static void cma_set_rep_event_data(struct rdma_cm_event *event,
901 struct ib_cm_rep_event_param *rep_data,
902 void *private_data)
903{
904 event->param.conn.private_data = private_data;
905 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
906 event->param.conn.responder_resources = rep_data->responder_resources;
907 event->param.conn.initiator_depth = rep_data->initiator_depth;
908 event->param.conn.flow_control = rep_data->flow_control;
909 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
910 event->param.conn.srq = rep_data->srq;
911 event->param.conn.qp_num = rep_data->remote_qpn;
912}
913
e51060f0
SH		 914static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
915{
916 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 917 struct rdma_cm_event event;
918 int ret = 0;
e51060f0 919
38ca83a5
AV		 920 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
921 cma_disable_callback(id_priv, CMA_CONNECT)) ||
922 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
923 cma_disable_callback(id_priv, CMA_DISCONNECT)))
8aa08602 924 return 0;
e51060f0 925
a1b1b61f 926 memset(&event, 0, sizeof event);
e51060f0
SH		 927 switch (ib_event->event) {
928 case IB_CM_REQ_ERROR:
929 case IB_CM_REP_ERROR:
a1b1b61f
SH		 930 event.event = RDMA_CM_EVENT_UNREACHABLE;
931 event.status = -ETIMEDOUT;
e51060f0
SH		 932 break;
933 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 934 event.status = cma_verify_rep(id_priv, ib_event->private_data);
935 if (event.status)
936 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 937 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 938 event.status = cma_rep_recv(id_priv);
939 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
940 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 941 } else
a1b1b61f
SH		 942 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
943 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
944 ib_event->private_data);
e51060f0
SH		 945 break;
946 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 947 case IB_CM_USER_ESTABLISHED:
948 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 949 break;
950 case IB_CM_DREQ_ERROR:
a1b1b61f 951 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 952 case IB_CM_DREQ_RECEIVED:
953 case IB_CM_DREP_RECEIVED:
954 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
955 goto out;
a1b1b61f 956 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 957 break;
958 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 959 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
960 break;
e51060f0
SH		 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:
468f2239 972 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 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);
de910bd9 982 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 983 rdma_destroy_id(&id_priv->id);
984 return ret;
985 }
986out:
de910bd9 987 mutex_unlock(&id_priv->handler_mutex);
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;
1b90c137 998 __be16 port;
e51060f0 999 u8 ip_ver;
64c5e613 1000 int ret;
e51060f0 1001
3f168d2b
KK		 1002 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1003 &ip_ver, &port, &src, &dst))
1004 goto err;
1005
e51060f0
SH		 1006 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1007 listen_id->ps);
1008 if (IS_ERR(id))
3f168d2b
KK		 1009 goto err;
1010
1011 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1012 ip_ver, port, src, dst);
e51060f0
SH		 1013
1014 rt = &id->route;
1015 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1016 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1017 GFP_KERNEL);
e51060f0 1018 if (!rt->path_rec)
3f168d2b 1019 goto destroy_id;
e51060f0 1020
e51060f0
SH		 1021 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1022 if (rt->num_paths == 2)
1023 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1024
6f8372b6
SH		 1025 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1026 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1027 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1028 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1029 } else {
1030 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1031 &rt->addr.dev_addr);
1032 if (ret)
1033 goto destroy_id;
1034 }
1035 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0
SH		 1036
1037 id_priv = container_of(id, struct rdma_id_private, id);
1038 id_priv->state = CMA_CONNECT;
1039 return id_priv;
3f168d2b
KK		 1040
1041destroy_id:
e51060f0 1042 rdma_destroy_id(id);
3f168d2b 1043err:
e51060f0
SH		 1044 return NULL;
1045}
1046
628e5f6d
SH		 1047static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1048 struct ib_cm_event *ib_event)
1049{
1050 struct rdma_id_private *id_priv;
1051 struct rdma_cm_id *id;
1052 union cma_ip_addr *src, *dst;
1b90c137 1053 __be16 port;
628e5f6d
SH		 1054 u8 ip_ver;
1055 int ret;
1056
1057 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1058 listen_id->ps);
1059 if (IS_ERR(id))
1060 return NULL;
1061
1062
1063 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1064 &ip_ver, &port, &src, &dst))
1065 goto err;
1066
1067 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1068 ip_ver, port, src, dst);
1069
6f8372b6
SH		 1070 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1071 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1072 &id->route.addr.dev_addr);
1073 if (ret)
1074 goto err;
1075 }
628e5f6d
SH		 1076
1077 id_priv = container_of(id, struct rdma_id_private, id);
1078 id_priv->state = CMA_CONNECT;
1079 return id_priv;
1080err:
1081 rdma_destroy_id(id);
1082 return NULL;
1083}
1084
a1b1b61f
SH		 1085static void cma_set_req_event_data(struct rdma_cm_event *event,
1086 struct ib_cm_req_event_param *req_data,
1087 void *private_data, int offset)
1088{
1089 event->param.conn.private_data = private_data + offset;
1090 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1091 event->param.conn.responder_resources = req_data->responder_resources;
1092 event->param.conn.initiator_depth = req_data->initiator_depth;
1093 event->param.conn.flow_control = req_data->flow_control;
1094 event->param.conn.retry_count = req_data->retry_count;
1095 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1096 event->param.conn.srq = req_data->srq;
1097 event->param.conn.qp_num = req_data->remote_qpn;
1098}
1099
e51060f0
SH		 1100static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1101{
1102 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1103 struct rdma_cm_event event;
e51060f0
SH		 1104 int offset, ret;
1105
1106 listen_id = cm_id->context;
de910bd9 1107 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1108 return -ECONNABORTED;
e51060f0 1109
628e5f6d
SH		 1110 memset(&event, 0, sizeof event);
1111 offset = cma_user_data_offset(listen_id->id.ps);
1112 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
c8f6a362 1113 if (cma_is_ud_ps(listen_id->id.ps)) {
628e5f6d
SH		 1114 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1115 event.param.ud.private_data = ib_event->private_data + offset;
1116 event.param.ud.private_data_len =
1117 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1118 } else {
1119 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1120 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1121 ib_event->private_data, offset);
1122 }
e51060f0
SH		 1123 if (!conn_id) {
1124 ret = -ENOMEM;
1125 goto out;
1126 }
1127
de910bd9 1128 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
61a73c70 1129 mutex_lock(&lock);
07ebafba 1130 ret = cma_acquire_dev(conn_id);
61a73c70 1131 mutex_unlock(&lock);
a1a733f6
KK		 1132 if (ret)
1133 goto release_conn_id;
e51060f0
SH		 1134
1135 conn_id->cm_id.ib = cm_id;
1136 cm_id->context = conn_id;
1137 cm_id->cm_handler = cma_ib_handler;
1138
a1b1b61f 1139 ret = conn_id->id.event_handler(&conn_id->id, &event);
45d9478d 1140 if (!ret) {
ead595ae
SH		 1141 /*
1142 * Acquire mutex to prevent user executing rdma_destroy_id()
1143 * while we're accessing the cm_id.
1144 */
1145 mutex_lock(&lock);
1146 if (cma_comp(conn_id, CMA_CONNECT) &&
1147 !cma_is_ud_ps(conn_id->id.ps))
1148 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1149 mutex_unlock(&lock);
de910bd9 1150 mutex_unlock(&conn_id->handler_mutex);
a1a733f6 1151 goto out;
45d9478d 1152 }
a1a733f6
KK		 1153
1154 /* Destroy the CM ID by returning a non-zero value. */
1155 conn_id->cm_id.ib = NULL;
1156
1157release_conn_id:
1158 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1159 mutex_unlock(&conn_id->handler_mutex);
a1a733f6
KK		 1160 rdma_destroy_id(&conn_id->id);
1161
e51060f0 1162out:
de910bd9 1163 mutex_unlock(&listen_id->handler_mutex);
e51060f0
SH		 1164 return ret;
1165}
1166
1167static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1168{
628e5f6d 1169 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1170}
1171
1172static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1173 struct ib_cm_compare_data *compare)
1174{
1175 struct cma_hdr *cma_data, *cma_mask;
1176 struct sdp_hh *sdp_data, *sdp_mask;
1b90c137 1177 __be32 ip4_addr;
e51060f0
SH		 1178 struct in6_addr ip6_addr;
1179
1180 memset(compare, 0, sizeof *compare);
1181 cma_data = (void *) compare->data;
1182 cma_mask = (void *) compare->mask;
1183 sdp_data = (void *) compare->data;
1184 sdp_mask = (void *) compare->mask;
1185
1186 switch (addr->sa_family) {
1187 case AF_INET:
1188 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1189 if (ps == RDMA_PS_SDP) {
1190 sdp_set_ip_ver(sdp_data, 4);
1191 sdp_set_ip_ver(sdp_mask, 0xF);
1192 sdp_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1193 sdp_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1194 } else {
1195 cma_set_ip_ver(cma_data, 4);
1196 cma_set_ip_ver(cma_mask, 0xF);
1197 cma_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1198 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1199 }
1200 break;
1201 case AF_INET6:
1202 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1203 if (ps == RDMA_PS_SDP) {
1204 sdp_set_ip_ver(sdp_data, 6);
1205 sdp_set_ip_ver(sdp_mask, 0xF);
1206 sdp_data->dst_addr.ip6 = ip6_addr;
1207 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1208 sizeof sdp_mask->dst_addr.ip6);
1209 } else {
1210 cma_set_ip_ver(cma_data, 6);
1211 cma_set_ip_ver(cma_mask, 0xF);
1212 cma_data->dst_addr.ip6 = ip6_addr;
1213 memset(&cma_mask->dst_addr.ip6, 0xFF,
1214 sizeof cma_mask->dst_addr.ip6);
1215 }
1216 break;
1217 default:
1218 break;
1219 }
1220}
1221
07ebafba
TT		 1222static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1223{
1224 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1225 struct rdma_cm_event event;
07ebafba
TT		 1226 struct sockaddr_in *sin;
1227 int ret = 0;
1228
de910bd9 1229 if (cma_disable_callback(id_priv, CMA_CONNECT))
be65f086 1230 return 0;
07ebafba 1231
be65f086 1232 memset(&event, 0, sizeof event);
07ebafba
TT		 1233 switch (iw_event->event) {
1234 case IW_CM_EVENT_CLOSE:
a1b1b61f 1235 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1236 break;
1237 case IW_CM_EVENT_CONNECT_REPLY:
1238 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1239 *sin = iw_event->local_addr;
1240 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1241 *sin = iw_event->remote_addr;
881a045f
SW		 1242 switch (iw_event->status) {
1243 case 0:
a1b1b61f 1244 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1245 break;
1246 case -ECONNRESET:
1247 case -ECONNREFUSED:
1248 event.event = RDMA_CM_EVENT_REJECTED;
1249 break;
1250 case -ETIMEDOUT:
1251 event.event = RDMA_CM_EVENT_UNREACHABLE;
1252 break;
1253 default:
1254 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1255 break;
1256 }
07ebafba
TT		 1257 break;
1258 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1259 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1260 break;
1261 default:
1262 BUG_ON(1);
1263 }
1264
a1b1b61f
SH		 1265 event.status = iw_event->status;
1266 event.param.conn.private_data = iw_event->private_data;
1267 event.param.conn.private_data_len = iw_event->private_data_len;
1268 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1269 if (ret) {
1270 /* Destroy the CM ID by returning a non-zero value. */
1271 id_priv->cm_id.iw = NULL;
1272 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1273 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1274 rdma_destroy_id(&id_priv->id);
1275 return ret;
1276 }
1277
de910bd9 1278 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1279 return ret;
1280}
1281
1282static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1283 struct iw_cm_event *iw_event)
1284{
1285 struct rdma_cm_id *new_cm_id;
1286 struct rdma_id_private *listen_id, *conn_id;
1287 struct sockaddr_in *sin;
1288 struct net_device *dev = NULL;
a1b1b61f 1289 struct rdma_cm_event event;
07ebafba 1290 int ret;
8d8293cf 1291 struct ib_device_attr attr;
07ebafba
TT		 1292
1293 listen_id = cm_id->context;
de910bd9 1294 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1295 return -ECONNABORTED;
07ebafba
TT		 1296
1297 /* Create a new RDMA id for the new IW CM ID */
1298 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1299 listen_id->id.context,
1300 RDMA_PS_TCP);
10f32065 1301 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1302 ret = -ENOMEM;
1303 goto out;
1304 }
1305 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1306 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba
TT		 1307 conn_id->state = CMA_CONNECT;
1308
1ab35276 1309 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
07ebafba
TT		 1310 if (!dev) {
1311 ret = -EADDRNOTAVAIL;
de910bd9 1312 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1313 rdma_destroy_id(new_cm_id);
1314 goto out;
1315 }
1316 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1317 if (ret) {
de910bd9 1318 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1319 rdma_destroy_id(new_cm_id);
1320 goto out;
1321 }
1322
61a73c70 1323 mutex_lock(&lock);
07ebafba 1324 ret = cma_acquire_dev(conn_id);
61a73c70 1325 mutex_unlock(&lock);
07ebafba 1326 if (ret) {
de910bd9 1327 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1328 rdma_destroy_id(new_cm_id);
1329 goto out;
1330 }
1331
1332 conn_id->cm_id.iw = cm_id;
1333 cm_id->context = conn_id;
1334 cm_id->cm_handler = cma_iw_handler;
1335
1336 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1337 *sin = iw_event->local_addr;
1338 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1339 *sin = iw_event->remote_addr;
1340
8d8293cf
SW		 1341 ret = ib_query_device(conn_id->id.device, &attr);
1342 if (ret) {
de910bd9 1343 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1344 rdma_destroy_id(new_cm_id);
1345 goto out;
1346 }
1347
a1b1b61f
SH		 1348 memset(&event, 0, sizeof event);
1349 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1350 event.param.conn.private_data = iw_event->private_data;
1351 event.param.conn.private_data_len = iw_event->private_data_len;
8d8293cf
SW		 1352 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1353 event.param.conn.responder_resources = attr.max_qp_rd_atom;
a1b1b61f 1354 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1355 if (ret) {
1356 /* User wants to destroy the CM ID */
1357 conn_id->cm_id.iw = NULL;
1358 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1359 mutex_unlock(&conn_id->handler_mutex);
07ebafba 1360 rdma_destroy_id(&conn_id->id);
de910bd9 1361 goto out;
07ebafba
TT		 1362 }
1363
de910bd9
OG		 1364 mutex_unlock(&conn_id->handler_mutex);
1365
07ebafba
TT		 1366out:
1367 if (dev)
1368 dev_put(dev);
de910bd9 1369 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1370 return ret;
1371}
1372
e51060f0
SH		 1373static int cma_ib_listen(struct rdma_id_private *id_priv)
1374{
1375 struct ib_cm_compare_data compare_data;
1376 struct sockaddr *addr;
1377 __be64 svc_id;
1378 int ret;
1379
1380 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1381 id_priv);
1382 if (IS_ERR(id_priv->cm_id.ib))
1383 return PTR_ERR(id_priv->cm_id.ib);
1384
3f446754 1385 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
e51060f0
SH		 1386 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1387 if (cma_any_addr(addr))
1388 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1389 else {
1390 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1391 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1392 }
1393
1394 if (ret) {
1395 ib_destroy_cm_id(id_priv->cm_id.ib);
1396 id_priv->cm_id.ib = NULL;
1397 }
1398
1399 return ret;
1400}
1401
07ebafba
TT		 1402static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1403{
1404 int ret;
1405 struct sockaddr_in *sin;
1406
1407 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1408 iw_conn_req_handler,
1409 id_priv);
1410 if (IS_ERR(id_priv->cm_id.iw))
1411 return PTR_ERR(id_priv->cm_id.iw);
1412
1413 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1414 id_priv->cm_id.iw->local_addr = *sin;
1415
1416 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1417
1418 if (ret) {
1419 iw_destroy_cm_id(id_priv->cm_id.iw);
1420 id_priv->cm_id.iw = NULL;
1421 }
1422
1423 return ret;
1424}
1425
e51060f0
SH		 1426static int cma_listen_handler(struct rdma_cm_id *id,
1427 struct rdma_cm_event *event)
1428{
1429 struct rdma_id_private *id_priv = id->context;
1430
1431 id->context = id_priv->id.context;
1432 id->event_handler = id_priv->id.event_handler;
1433 return id_priv->id.event_handler(id, event);
1434}
1435
1436static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1437 struct cma_device *cma_dev)
1438{
1439 struct rdma_id_private *dev_id_priv;
1440 struct rdma_cm_id *id;
1441 int ret;
1442
1443 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1444 if (IS_ERR(id))
1445 return;
1446
1447 dev_id_priv = container_of(id, struct rdma_id_private, id);
1448
1449 dev_id_priv->state = CMA_ADDR_BOUND;
1450 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
3f446754 1451 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
e51060f0
SH		 1452
1453 cma_attach_to_dev(dev_id_priv, cma_dev);
1454 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1455 atomic_inc(&id_priv->refcount);
1456 dev_id_priv->internal_id = 1;
e51060f0
SH		 1457
1458 ret = rdma_listen(id, id_priv->backlog);
1459 if (ret)
d02d1f53 1460 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1461 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1462}
1463
1464static void cma_listen_on_all(struct rdma_id_private *id_priv)
1465{
1466 struct cma_device *cma_dev;
1467
1468 mutex_lock(&lock);
1469 list_add_tail(&id_priv->list, &listen_any_list);
1470 list_for_each_entry(cma_dev, &dev_list, list)
1471 cma_listen_on_dev(id_priv, cma_dev);
1472 mutex_unlock(&lock);
1473}
1474
e51060f0
SH		 1475int rdma_listen(struct rdma_cm_id *id, int backlog)
1476{
1477 struct rdma_id_private *id_priv;
1478 int ret;
1479
1480 id_priv = container_of(id, struct rdma_id_private, id);
1481 if (id_priv->state == CMA_IDLE) {
d14714df
SH		 1482 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
1483 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
e51060f0
SH		 1484 if (ret)
1485 return ret;
1486 }
1487
1488 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1489 return -EINVAL;
1490
1491 id_priv->backlog = backlog;
1492 if (id->device) {
07ebafba
TT		 1493 switch (rdma_node_get_transport(id->device->node_type)) {
1494 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1495 ret = cma_ib_listen(id_priv);
1496 if (ret)
1497 goto err;
1498 break;
07ebafba
TT		 1499 case RDMA_TRANSPORT_IWARP:
1500 ret = cma_iw_listen(id_priv, backlog);
1501 if (ret)
1502 goto err;
1503 break;
e51060f0
SH		 1504 default:
1505 ret = -ENOSYS;
1506 goto err;
1507 }
1508 } else
1509 cma_listen_on_all(id_priv);
1510
1511 return 0;
1512err:
1513 id_priv->backlog = 0;
1514 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1515 return ret;
1516}
1517EXPORT_SYMBOL(rdma_listen);
1518
a81c994d
SH		 1519void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1520{
1521 struct rdma_id_private *id_priv;
1522
1523 id_priv = container_of(id, struct rdma_id_private, id);
1524 id_priv->tos = (u8) tos;
1525}
1526EXPORT_SYMBOL(rdma_set_service_type);
1527
e51060f0
SH		 1528static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1529 void *context)
1530{
1531 struct cma_work *work = context;
1532 struct rdma_route *route;
1533
1534 route = &work->id->id.route;
1535
1536 if (!status) {
1537 route->num_paths = 1;
1538 *route->path_rec = *path_rec;
1539 } else {
1540 work->old_state = CMA_ROUTE_QUERY;
1541 work->new_state = CMA_ADDR_RESOLVED;
1542 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1543 work->event.status = status;
e51060f0
SH		 1544 }
1545
1546 queue_work(cma_wq, &work->work);
1547}
1548
1549static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1550 struct cma_work *work)
1551{
a81c994d 1552 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1553 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1554 ib_sa_comp_mask comp_mask;
1555 struct sockaddr_in6 *sin6;
e51060f0
SH		 1556
1557 memset(&path_rec, 0, sizeof path_rec);
6f8372b6
SH		 1558 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1559 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
a81c994d 1560 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1561 path_rec.numb_path = 1;
962063e6 1562 path_rec.reversible = 1;
3f446754
RD		 1563 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1564 (struct sockaddr *) &addr->dst_addr);
a81c994d
SH		 1565
1566 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1567 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1568 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1569
3f446754 1570 if (addr->src_addr.ss_family == AF_INET) {
a81c994d
SH		 1571 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1572 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1573 } else {
1574 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1575 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1576 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1577 }
e51060f0 1578
c1a0b23b 1579 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1580 id_priv->id.port_num, &path_rec,
1581 comp_mask, timeout_ms,
1582 GFP_KERNEL, cma_query_handler,
1583 work, &id_priv->query);
e51060f0
SH		 1584
1585 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1586}
1587
c4028958 1588static void cma_work_handler(struct work_struct *_work)
e51060f0 1589{
c4028958 1590 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1591 struct rdma_id_private *id_priv = work->id;
1592 int destroy = 0;
1593
de910bd9 1594 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1595 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1596 goto out;
1597
1598 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1599 cma_exch(id_priv, CMA_DESTROYING);
1600 destroy = 1;
1601 }
1602out:
de910bd9 1603 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1604 cma_deref_id(id_priv);
1605 if (destroy)
1606 rdma_destroy_id(&id_priv->id);
1607 kfree(work);
1608}
1609
dd5bdff8
OG		 1610static void cma_ndev_work_handler(struct work_struct *_work)
1611{
1612 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1613 struct rdma_id_private *id_priv = work->id;
1614 int destroy = 0;
1615
1616 mutex_lock(&id_priv->handler_mutex);
1617 if (id_priv->state == CMA_DESTROYING ||
1618 id_priv->state == CMA_DEVICE_REMOVAL)
1619 goto out;
1620
1621 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1622 cma_exch(id_priv, CMA_DESTROYING);
1623 destroy = 1;
1624 }
1625
1626out:
1627 mutex_unlock(&id_priv->handler_mutex);
1628 cma_deref_id(id_priv);
1629 if (destroy)
1630 rdma_destroy_id(&id_priv->id);
1631 kfree(work);
1632}
1633
e51060f0
SH		 1634static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1635{
1636 struct rdma_route *route = &id_priv->id.route;
1637 struct cma_work *work;
1638 int ret;
1639
1640 work = kzalloc(sizeof *work, GFP_KERNEL);
1641 if (!work)
1642 return -ENOMEM;
1643
1644 work->id = id_priv;
c4028958 1645 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1646 work->old_state = CMA_ROUTE_QUERY;
1647 work->new_state = CMA_ROUTE_RESOLVED;
1648 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1649
1650 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1651 if (!route->path_rec) {
1652 ret = -ENOMEM;
1653 goto err1;
1654 }
1655
1656 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1657 if (ret)
1658 goto err2;
1659
1660 return 0;
1661err2:
1662 kfree(route->path_rec);
1663 route->path_rec = NULL;
1664err1:
1665 kfree(work);
1666 return ret;
1667}
1668
1669int rdma_set_ib_paths(struct rdma_cm_id *id,
1670 struct ib_sa_path_rec *path_rec, int num_paths)
1671{
1672 struct rdma_id_private *id_priv;
1673 int ret;
1674
1675 id_priv = container_of(id, struct rdma_id_private, id);
1676 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1677 return -EINVAL;
1678
9893e742
JL		 1679 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1680 GFP_KERNEL);
e51060f0
SH		 1681 if (!id->route.path_rec) {
1682 ret = -ENOMEM;
1683 goto err;
1684 }
1685
ae2d9293 1686 id->route.num_paths = num_paths;
e51060f0
SH		 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
6f8372b6
SH		 1775 id_priv->id.route.addr.dev_addr.dev_type =
1776 (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB) ?
1777 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1778
1779 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1780 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1781 id_priv->id.port_num = p;
1782 cma_attach_to_dev(id_priv, cma_dev);
1783out:
1784 mutex_unlock(&lock);
1785 return ret;
1786}
1787
1788static void addr_handler(int status, struct sockaddr *src_addr,
1789 struct rdma_dev_addr *dev_addr, void *context)
1790{
1791 struct rdma_id_private *id_priv = context;
a1b1b61f 1792 struct rdma_cm_event event;
e51060f0 1793
a1b1b61f 1794 memset(&event, 0, sizeof event);
de910bd9 1795 mutex_lock(&id_priv->handler_mutex);
61a73c70
SH		 1796
1797 /*
1798 * Grab mutex to block rdma_destroy_id() from removing the device while
1799 * we're trying to acquire it.
1800 */
1801 mutex_lock(&lock);
1802 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1803 mutex_unlock(&lock);
1804 goto out;
1805 }
1806
1807 if (!status && !id_priv->cma_dev)
e51060f0 1808 status = cma_acquire_dev(id_priv);
61a73c70 1809 mutex_unlock(&lock);
e51060f0
SH		 1810
1811 if (status) {
61a73c70 1812 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1813 goto out;
a1b1b61f
SH		 1814 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1815 event.status = status;
e51060f0 1816 } else {
e51060f0
SH		 1817 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1818 ip_addr_size(src_addr));
a1b1b61f 1819 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1820 }
1821
a1b1b61f 1822 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1823 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1824 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1825 cma_deref_id(id_priv);
1826 rdma_destroy_id(&id_priv->id);
1827 return;
1828 }
1829out:
de910bd9 1830 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1831 cma_deref_id(id_priv);
1832}
1833
1834static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1835{
1836 struct cma_work *work;
6f8372b6 1837 struct sockaddr *src, *dst;
f0ee3404 1838 union ib_gid gid;
e51060f0
SH		 1839 int ret;
1840
1841 work = kzalloc(sizeof *work, GFP_KERNEL);
1842 if (!work)
1843 return -ENOMEM;
1844
1845 if (!id_priv->cma_dev) {
1846 ret = cma_bind_loopback(id_priv);
1847 if (ret)
1848 goto err;
1849 }
1850
6f8372b6
SH		 1851 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1852 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 1853
6f8372b6
SH		 1854 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1855 if (cma_zero_addr(src)) {
1856 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
1857 if ((src->sa_family = dst->sa_family) == AF_INET) {
1858 ((struct sockaddr_in *) src)->sin_addr.s_addr =
1859 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1860 } else {
1861 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
1862 &((struct sockaddr_in6 *) dst)->sin6_addr);
1863 }
e51060f0
SH		 1864 }
1865
1866 work->id = id_priv;
c4028958 1867 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1868 work->old_state = CMA_ADDR_QUERY;
1869 work->new_state = CMA_ADDR_RESOLVED;
1870 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1871 queue_work(cma_wq, &work->work);
1872 return 0;
1873err:
1874 kfree(work);
1875 return ret;
1876}
1877
1878static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1879 struct sockaddr *dst_addr)
1880{
d14714df
SH		 1881 if (!src_addr || !src_addr->sa_family) {
1882 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
1883 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
1884 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
1885 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
1886 }
1887 }
1888 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 1889}
1890
1891int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1892 struct sockaddr *dst_addr, int timeout_ms)
1893{
1894 struct rdma_id_private *id_priv;
1895 int ret;
1896
1897 id_priv = container_of(id, struct rdma_id_private, id);
1898 if (id_priv->state == CMA_IDLE) {
1899 ret = cma_bind_addr(id, src_addr, dst_addr);
1900 if (ret)
1901 return ret;
1902 }
1903
1904 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1905 return -EINVAL;
1906
1907 atomic_inc(&id_priv->refcount);
1908 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1909 if (cma_any_addr(dst_addr))
1910 ret = cma_resolve_loopback(id_priv);
1911 else
3f446754 1912 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 1913 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1914 timeout_ms, addr_handler, id_priv);
1915 if (ret)
1916 goto err;
1917
1918 return 0;
1919err:
1920 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1921 cma_deref_id(id_priv);
1922 return ret;
1923}
1924EXPORT_SYMBOL(rdma_resolve_addr);
1925
1926static void cma_bind_port(struct rdma_bind_list *bind_list,
1927 struct rdma_id_private *id_priv)
1928{
1929 struct sockaddr_in *sin;
1930
1931 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1932 sin->sin_port = htons(bind_list->port);
1933 id_priv->bind_list = bind_list;
1934 hlist_add_head(&id_priv->node, &bind_list->owners);
1935}
1936
1937static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1938 unsigned short snum)
1939{
1940 struct rdma_bind_list *bind_list;
aedec080 1941 int port, ret;
e51060f0 1942
cb164b8c 1943 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 1944 if (!bind_list)
1945 return -ENOMEM;
1946
aedec080
SH		 1947 do {
1948 ret = idr_get_new_above(ps, bind_list, snum, &port);
1949 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1950
1951 if (ret)
1952 goto err1;
1953
1954 if (port != snum) {
1955 ret = -EADDRNOTAVAIL;
1956 goto err2;
1957 }
1958
1959 bind_list->ps = ps;
1960 bind_list->port = (unsigned short) port;
1961 cma_bind_port(bind_list, id_priv);
1962 return 0;
1963err2:
1964 idr_remove(ps, port);
1965err1:
1966 kfree(bind_list);
1967 return ret;
1968}
e51060f0 1969
aedec080
SH		 1970static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1971{
5d7220e8
TH		 1972 static unsigned int last_used_port;
1973 int low, high, remaining;
1974 unsigned int rover;
e51060f0 1975
227b60f5 1976 inet_get_local_port_range(&low, &high);
5d7220e8
TH		 1977 remaining = (high - low) + 1;
1978 rover = net_random() % remaining + low;
1979retry:
1980 if (last_used_port != rover &&
1981 !idr_find(ps, (unsigned short) rover)) {
1982 int ret = cma_alloc_port(ps, id_priv, rover);
1983 /*
1984 * Remember previously used port number in order to avoid
1985 * re-using same port immediately after it is closed.
1986 */
1987 if (!ret)
1988 last_used_port = rover;
1989 if (ret != -EADDRNOTAVAIL)
1990 return ret;
e51060f0 1991 }
5d7220e8
TH		 1992 if (--remaining) {
1993 rover++;
1994 if ((rover < low) || (rover > high))
1995 rover = low;
1996 goto retry;
1997 }
1998 return -EADDRNOTAVAIL;
e51060f0
SH		 1999}
2000
2001static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2002{
2003 struct rdma_id_private *cur_id;
2004 struct sockaddr_in *sin, *cur_sin;
2005 struct rdma_bind_list *bind_list;
2006 struct hlist_node *node;
2007 unsigned short snum;
2008
2009 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2010 snum = ntohs(sin->sin_port);
2011 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2012 return -EACCES;
2013
2014 bind_list = idr_find(ps, snum);
2015 if (!bind_list)
2016 return cma_alloc_port(ps, id_priv, snum);
2017
2018 /*
2019 * We don't support binding to any address if anyone is bound to
2020 * a specific address on the same port.
2021 */
3f446754 2022 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr))
e51060f0
SH		 2023 return -EADDRNOTAVAIL;
2024
2025 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
3f446754 2026 if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr))
e51060f0 2027 return -EADDRNOTAVAIL;
3cd96564 2028
e51060f0
SH		 2029 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
2030 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2031 return -EADDRINUSE;
2032 }
2033
2034 cma_bind_port(bind_list, id_priv);
2035 return 0;
2036}
2037
2038static int cma_get_port(struct rdma_id_private *id_priv)
2039{
2040 struct idr *ps;
2041 int ret;
2042
2043 switch (id_priv->id.ps) {
2044 case RDMA_PS_SDP:
2045 ps = &sdp_ps;
2046 break;
2047 case RDMA_PS_TCP:
2048 ps = &tcp_ps;
2049 break;
628e5f6d
SH		 2050 case RDMA_PS_UDP:
2051 ps = &udp_ps;
2052 break;
c8f6a362
SH		 2053 case RDMA_PS_IPOIB:
2054 ps = &ipoib_ps;
2055 break;
e51060f0
SH		 2056 default:
2057 return -EPROTONOSUPPORT;
2058 }
2059
2060 mutex_lock(&lock);
3f446754 2061 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2062 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2063 else
2064 ret = cma_use_port(ps, id_priv);
2065 mutex_unlock(&lock);
2066
2067 return ret;
2068}
2069
d14714df
SH		 2070static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2071 struct sockaddr *addr)
2072{
fd4582a3 2073#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
d14714df
SH		 2074 struct sockaddr_in6 *sin6;
2075
2076 if (addr->sa_family != AF_INET6)
2077 return 0;
2078
2079 sin6 = (struct sockaddr_in6 *) addr;
2080 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2081 !sin6->sin6_scope_id)
2082 return -EINVAL;
2083
2084 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2085#endif
2086 return 0;
2087}
2088
e51060f0
SH		 2089int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2090{
2091 struct rdma_id_private *id_priv;
2092 int ret;
2093
1f5175ad 2094 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
e51060f0
SH		 2095 return -EAFNOSUPPORT;
2096
2097 id_priv = container_of(id, struct rdma_id_private, id);
2098 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2099 return -EINVAL;
2100
d14714df
SH		 2101 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2102 if (ret)
2103 goto err1;
2104
8523c048 2105 if (!cma_any_addr(addr)) {
e51060f0 2106 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2107 if (ret)
255d0c14
KK		 2108 goto err1;
2109
2110 mutex_lock(&lock);
2111 ret = cma_acquire_dev(id_priv);
2112 mutex_unlock(&lock);
2113 if (ret)
2114 goto err1;
e51060f0
SH		 2115 }
2116
2117 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2118 ret = cma_get_port(id_priv);
2119 if (ret)
255d0c14 2120 goto err2;
e51060f0
SH		 2121
2122 return 0;
255d0c14 2123err2:
6f8372b6 2124 if (id_priv->cma_dev) {
255d0c14
KK		 2125 mutex_lock(&lock);
2126 cma_detach_from_dev(id_priv);
2127 mutex_unlock(&lock);
2128 }
2129err1:
e51060f0
SH		 2130 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2131 return ret;
2132}
2133EXPORT_SYMBOL(rdma_bind_addr);
2134
2135static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2136 struct rdma_route *route)
2137{
e51060f0
SH		 2138 struct cma_hdr *cma_hdr;
2139 struct sdp_hh *sdp_hdr;
2140
1f5175ad
AS		 2141 if (route->addr.src_addr.ss_family == AF_INET) {
2142 struct sockaddr_in *src4, *dst4;
2143
2144 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2145 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2146
2147 switch (ps) {
2148 case RDMA_PS_SDP:
2149 sdp_hdr = hdr;
2150 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2151 return -EINVAL;
2152 sdp_set_ip_ver(sdp_hdr, 4);
2153 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2154 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2155 sdp_hdr->port = src4->sin_port;
2156 break;
2157 default:
2158 cma_hdr = hdr;
2159 cma_hdr->cma_version = CMA_VERSION;
2160 cma_set_ip_ver(cma_hdr, 4);
2161 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2162 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2163 cma_hdr->port = src4->sin_port;
2164 break;
2165 }
2166 } else {
2167 struct sockaddr_in6 *src6, *dst6;
2168
2169 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2170 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2171
2172 switch (ps) {
2173 case RDMA_PS_SDP:
2174 sdp_hdr = hdr;
2175 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2176 return -EINVAL;
2177 sdp_set_ip_ver(sdp_hdr, 6);
2178 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2179 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2180 sdp_hdr->port = src6->sin6_port;
2181 break;
2182 default:
2183 cma_hdr = hdr;
2184 cma_hdr->cma_version = CMA_VERSION;
2185 cma_set_ip_ver(cma_hdr, 6);
2186 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2187 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2188 cma_hdr->port = src6->sin6_port;
2189 break;
2190 }
e51060f0
SH		 2191 }
2192 return 0;
2193}
2194
628e5f6d
SH		 2195static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2196 struct ib_cm_event *ib_event)
2197{
2198 struct rdma_id_private *id_priv = cm_id->context;
2199 struct rdma_cm_event event;
2200 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2201 int ret = 0;
2202
de910bd9 2203 if (cma_disable_callback(id_priv, CMA_CONNECT))
8aa08602 2204 return 0;
628e5f6d 2205
8aa08602 2206 memset(&event, 0, sizeof event);
628e5f6d
SH		 2207 switch (ib_event->event) {
2208 case IB_CM_SIDR_REQ_ERROR:
2209 event.event = RDMA_CM_EVENT_UNREACHABLE;
2210 event.status = -ETIMEDOUT;
2211 break;
2212 case IB_CM_SIDR_REP_RECEIVED:
2213 event.param.ud.private_data = ib_event->private_data;
2214 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2215 if (rep->status != IB_SIDR_SUCCESS) {
2216 event.event = RDMA_CM_EVENT_UNREACHABLE;
2217 event.status = ib_event->param.sidr_rep_rcvd.status;
2218 break;
2219 }
d2ca39f2
YE		 2220 ret = cma_set_qkey(id_priv);
2221 if (ret) {
2222 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2223 event.status = -EINVAL;
2224 break;
2225 }
c8f6a362 2226 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2227 event.event = RDMA_CM_EVENT_UNREACHABLE;
2228 event.status = -EINVAL;
2229 break;
2230 }
2231 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2232 id_priv->id.route.path_rec,
2233 &event.param.ud.ah_attr);
2234 event.param.ud.qp_num = rep->qpn;
2235 event.param.ud.qkey = rep->qkey;
2236 event.event = RDMA_CM_EVENT_ESTABLISHED;
2237 event.status = 0;
2238 break;
2239 default:
468f2239 2240 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2241 ib_event->event);
2242 goto out;
2243 }
2244
2245 ret = id_priv->id.event_handler(&id_priv->id, &event);
2246 if (ret) {
2247 /* Destroy the CM ID by returning a non-zero value. */
2248 id_priv->cm_id.ib = NULL;
2249 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2250 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2251 rdma_destroy_id(&id_priv->id);
2252 return ret;
2253 }
2254out:
de910bd9 2255 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2256 return ret;
2257}
2258
2259static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2260 struct rdma_conn_param *conn_param)
2261{
2262 struct ib_cm_sidr_req_param req;
2263 struct rdma_route *route;
2264 int ret;
2265
2266 req.private_data_len = sizeof(struct cma_hdr) +
2267 conn_param->private_data_len;
2268 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2269 if (!req.private_data)
2270 return -ENOMEM;
2271
2272 if (conn_param->private_data && conn_param->private_data_len)
2273 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2274 conn_param->private_data, conn_param->private_data_len);
2275
2276 route = &id_priv->id.route;
2277 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2278 if (ret)
2279 goto out;
2280
2281 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2282 cma_sidr_rep_handler, id_priv);
2283 if (IS_ERR(id_priv->cm_id.ib)) {
2284 ret = PTR_ERR(id_priv->cm_id.ib);
2285 goto out;
2286 }
2287
2288 req.path = route->path_rec;
2289 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2290 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2291 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2292 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2293
2294 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2295 if (ret) {
2296 ib_destroy_cm_id(id_priv->cm_id.ib);
2297 id_priv->cm_id.ib = NULL;
2298 }
2299out:
2300 kfree(req.private_data);
2301 return ret;
2302}
2303
e51060f0
SH		 2304static int cma_connect_ib(struct rdma_id_private *id_priv,
2305 struct rdma_conn_param *conn_param)
2306{
2307 struct ib_cm_req_param req;
2308 struct rdma_route *route;
2309 void *private_data;
2310 int offset, ret;
2311
2312 memset(&req, 0, sizeof req);
2313 offset = cma_user_data_offset(id_priv->id.ps);
2314 req.private_data_len = offset + conn_param->private_data_len;
2315 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2316 if (!private_data)
2317 return -ENOMEM;
2318
2319 if (conn_param->private_data && conn_param->private_data_len)
2320 memcpy(private_data + offset, conn_param->private_data,
2321 conn_param->private_data_len);
2322
2323 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2324 id_priv);
2325 if (IS_ERR(id_priv->cm_id.ib)) {
2326 ret = PTR_ERR(id_priv->cm_id.ib);
2327 goto out;
2328 }
2329
2330 route = &id_priv->id.route;
2331 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2332 if (ret)
2333 goto out;
2334 req.private_data = private_data;
2335
2336 req.primary_path = &route->path_rec[0];
2337 if (route->num_paths == 2)
2338 req.alternate_path = &route->path_rec[1];
2339
2340 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2341 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2342 req.qp_num = id_priv->qp_num;
9b2e9c0c 2343 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2344 req.starting_psn = id_priv->seq_num;
2345 req.responder_resources = conn_param->responder_resources;
2346 req.initiator_depth = conn_param->initiator_depth;
2347 req.flow_control = conn_param->flow_control;
2348 req.retry_count = conn_param->retry_count;
2349 req.rnr_retry_count = conn_param->rnr_retry_count;
2350 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2351 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2352 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2353 req.srq = id_priv->srq ? 1 : 0;
2354
2355 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2356out:
675a027c
KK		 2357 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2358 ib_destroy_cm_id(id_priv->cm_id.ib);
2359 id_priv->cm_id.ib = NULL;
2360 }
2361
e51060f0
SH		 2362 kfree(private_data);
2363 return ret;
2364}
2365
07ebafba
TT		 2366static int cma_connect_iw(struct rdma_id_private *id_priv,
2367 struct rdma_conn_param *conn_param)
2368{
2369 struct iw_cm_id *cm_id;
2370 struct sockaddr_in* sin;
2371 int ret;
2372 struct iw_cm_conn_param iw_param;
2373
2374 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2375 if (IS_ERR(cm_id)) {
2376 ret = PTR_ERR(cm_id);
2377 goto out;
2378 }
2379
2380 id_priv->cm_id.iw = cm_id;
2381
2382 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2383 cm_id->local_addr = *sin;
2384
2385 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2386 cm_id->remote_addr = *sin;
2387
5851bb89 2388 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2389 if (ret)
2390 goto out;
07ebafba
TT		 2391
2392 iw_param.ord = conn_param->initiator_depth;
2393 iw_param.ird = conn_param->responder_resources;
2394 iw_param.private_data = conn_param->private_data;
2395 iw_param.private_data_len = conn_param->private_data_len;
2396 if (id_priv->id.qp)
2397 iw_param.qpn = id_priv->qp_num;
2398 else
2399 iw_param.qpn = conn_param->qp_num;
2400 ret = iw_cm_connect(cm_id, &iw_param);
2401out:
675a027c
KK		 2402 if (ret && !IS_ERR(cm_id)) {
2403 iw_destroy_cm_id(cm_id);
2404 id_priv->cm_id.iw = NULL;
2405 }
07ebafba
TT		 2406 return ret;
2407}
2408
e51060f0
SH		 2409int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2410{
2411 struct rdma_id_private *id_priv;
2412 int ret;
2413
2414 id_priv = container_of(id, struct rdma_id_private, id);
2415 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2416 return -EINVAL;
2417
2418 if (!id->qp) {
2419 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2420 id_priv->srq = conn_param->srq;
2421 }
2422
07ebafba
TT		 2423 switch (rdma_node_get_transport(id->device->node_type)) {
2424 case RDMA_TRANSPORT_IB:
c8f6a362 2425 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2426 ret = cma_resolve_ib_udp(id_priv, conn_param);
2427 else
2428 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2429 break;
07ebafba
TT		 2430 case RDMA_TRANSPORT_IWARP:
2431 ret = cma_connect_iw(id_priv, conn_param);
2432 break;
e51060f0
SH		 2433 default:
2434 ret = -ENOSYS;
2435 break;
2436 }
2437 if (ret)
2438 goto err;
2439
2440 return 0;
2441err:
2442 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2443 return ret;
2444}
2445EXPORT_SYMBOL(rdma_connect);
2446
2447static int cma_accept_ib(struct rdma_id_private *id_priv,
2448 struct rdma_conn_param *conn_param)
2449{
2450 struct ib_cm_rep_param rep;
5851bb89 2451 int ret;
0fe313b0 2452
5851bb89
SH		 2453 ret = cma_modify_qp_rtr(id_priv, conn_param);
2454 if (ret)
2455 goto out;
0fe313b0 2456
5851bb89
SH		 2457 ret = cma_modify_qp_rts(id_priv, conn_param);
2458 if (ret)
2459 goto out;
e51060f0
SH		 2460
2461 memset(&rep, 0, sizeof rep);
2462 rep.qp_num = id_priv->qp_num;
2463 rep.starting_psn = id_priv->seq_num;
2464 rep.private_data = conn_param->private_data;
2465 rep.private_data_len = conn_param->private_data_len;
2466 rep.responder_resources = conn_param->responder_resources;
2467 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2468 rep.failover_accepted = 0;
2469 rep.flow_control = conn_param->flow_control;
2470 rep.rnr_retry_count = conn_param->rnr_retry_count;
2471 rep.srq = id_priv->srq ? 1 : 0;
2472
0fe313b0
SH		 2473 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2474out:
2475 return ret;
e51060f0
SH		 2476}
2477
07ebafba
TT		 2478static int cma_accept_iw(struct rdma_id_private *id_priv,
2479 struct rdma_conn_param *conn_param)
2480{
2481 struct iw_cm_conn_param iw_param;
2482 int ret;
2483
5851bb89 2484 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2485 if (ret)
2486 return ret;
2487
2488 iw_param.ord = conn_param->initiator_depth;
2489 iw_param.ird = conn_param->responder_resources;
2490 iw_param.private_data = conn_param->private_data;
2491 iw_param.private_data_len = conn_param->private_data_len;
2492 if (id_priv->id.qp) {
2493 iw_param.qpn = id_priv->qp_num;
2494 } else
2495 iw_param.qpn = conn_param->qp_num;
2496
2497 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2498}
2499
628e5f6d
SH		 2500static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2501 enum ib_cm_sidr_status status,
2502 const void *private_data, int private_data_len)
2503{
2504 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2505 int ret;
628e5f6d
SH		 2506
2507 memset(&rep, 0, sizeof rep);
2508 rep.status = status;
2509 if (status == IB_SIDR_SUCCESS) {
d2ca39f2
YE		 2510 ret = cma_set_qkey(id_priv);
2511 if (ret)
2512 return ret;
628e5f6d 2513 rep.qp_num = id_priv->qp_num;
c8f6a362 2514 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2515 }
2516 rep.private_data = private_data;
2517 rep.private_data_len = private_data_len;
2518
2519 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2520}
2521
e51060f0
SH		 2522int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2523{
2524 struct rdma_id_private *id_priv;
2525 int ret;
2526
2527 id_priv = container_of(id, struct rdma_id_private, id);
2528 if (!cma_comp(id_priv, CMA_CONNECT))
2529 return -EINVAL;
2530
2531 if (!id->qp && conn_param) {
2532 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2533 id_priv->srq = conn_param->srq;
2534 }
2535
07ebafba
TT		 2536 switch (rdma_node_get_transport(id->device->node_type)) {
2537 case RDMA_TRANSPORT_IB:
c8f6a362 2538 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2539 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2540 conn_param->private_data,
2541 conn_param->private_data_len);
2542 else if (conn_param)
e51060f0
SH		 2543 ret = cma_accept_ib(id_priv, conn_param);
2544 else
2545 ret = cma_rep_recv(id_priv);
2546 break;
07ebafba
TT		 2547 case RDMA_TRANSPORT_IWARP:
2548 ret = cma_accept_iw(id_priv, conn_param);
2549 break;
e51060f0
SH		 2550 default:
2551 ret = -ENOSYS;
2552 break;
2553 }
2554
2555 if (ret)
2556 goto reject;
2557
2558 return 0;
2559reject:
c5483388 2560 cma_modify_qp_err(id_priv);
e51060f0
SH		 2561 rdma_reject(id, NULL, 0);
2562 return ret;
2563}
2564EXPORT_SYMBOL(rdma_accept);
2565
0fe313b0
SH		 2566int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2567{
2568 struct rdma_id_private *id_priv;
2569 int ret;
2570
2571 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2572 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2573 return -EINVAL;
2574
2575 switch (id->device->node_type) {
2576 case RDMA_NODE_IB_CA:
2577 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2578 break;
2579 default:
2580 ret = 0;
2581 break;
2582 }
2583 return ret;
2584}
2585EXPORT_SYMBOL(rdma_notify);
2586
e51060f0
SH		 2587int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2588 u8 private_data_len)
2589{
2590 struct rdma_id_private *id_priv;
2591 int ret;
2592
2593 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2594 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2595 return -EINVAL;
2596
07ebafba
TT		 2597 switch (rdma_node_get_transport(id->device->node_type)) {
2598 case RDMA_TRANSPORT_IB:
c8f6a362 2599 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2600 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2601 private_data, private_data_len);
2602 else
2603 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2604 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2605 0, private_data, private_data_len);
e51060f0 2606 break;
07ebafba
TT		 2607 case RDMA_TRANSPORT_IWARP:
2608 ret = iw_cm_reject(id_priv->cm_id.iw,
2609 private_data, private_data_len);
2610 break;
e51060f0
SH		 2611 default:
2612 ret = -ENOSYS;
2613 break;
2614 }
2615 return ret;
2616}
2617EXPORT_SYMBOL(rdma_reject);
2618
2619int rdma_disconnect(struct rdma_cm_id *id)
2620{
2621 struct rdma_id_private *id_priv;
2622 int ret;
2623
2624 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2625 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2626 return -EINVAL;
2627
07ebafba
TT		 2628 switch (rdma_node_get_transport(id->device->node_type)) {
2629 case RDMA_TRANSPORT_IB:
c5483388 2630 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2631 if (ret)
2632 goto out;
e51060f0
SH		 2633 /* Initiate or respond to a disconnect. */
2634 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2635 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2636 break;
07ebafba
TT		 2637 case RDMA_TRANSPORT_IWARP:
2638 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2639 break;
e51060f0 2640 default:
07ebafba 2641 ret = -EINVAL;
e51060f0
SH		 2642 break;
2643 }
2644out:
2645 return ret;
2646}
2647EXPORT_SYMBOL(rdma_disconnect);
2648
c8f6a362
SH		 2649static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2650{
2651 struct rdma_id_private *id_priv;
2652 struct cma_multicast *mc = multicast->context;
2653 struct rdma_cm_event event;
2654 int ret;
2655
2656 id_priv = mc->id_priv;
de910bd9
OG		 2657 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2658 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
8aa08602 2659 return 0;
c8f6a362 2660
c5483388 2661 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2662 if (!status && id_priv->id.qp)
2663 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2664 multicast->rec.mlid);
c5483388 2665 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2666
2667 memset(&event, 0, sizeof event);
2668 event.status = status;
2669 event.param.ud.private_data = mc->context;
2670 if (!status) {
2671 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2672 ib_init_ah_from_mcmember(id_priv->id.device,
2673 id_priv->id.port_num, &multicast->rec,
2674 &event.param.ud.ah_attr);
2675 event.param.ud.qp_num = 0xFFFFFF;
2676 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2677 } else
2678 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2679
2680 ret = id_priv->id.event_handler(&id_priv->id, &event);
2681 if (ret) {
2682 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2683 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2684 rdma_destroy_id(&id_priv->id);
2685 return 0;
2686 }
8aa08602 2687
de910bd9 2688 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2689 return 0;
2690}
2691
2692static void cma_set_mgid(struct rdma_id_private *id_priv,
2693 struct sockaddr *addr, union ib_gid *mgid)
2694{
2695 unsigned char mc_map[MAX_ADDR_LEN];
2696 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2697 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2698 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2699
2700 if (cma_any_addr(addr)) {
2701 memset(mgid, 0, sizeof *mgid);
2702 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 2703 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 2704 0xFF10A01B)) {
2705 /* IPv6 address is an SA assigned MGID. */
2706 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
e2e62697
JG		 2707 } else if ((addr->sa_family == AF_INET6)) {
2708 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2709 if (id_priv->id.ps == RDMA_PS_UDP)
2710 mc_map[7] = 0x01; /* Use RDMA CM signature */
2711 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 2712 } else {
a9e527e3 2713 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2714 if (id_priv->id.ps == RDMA_PS_UDP)
2715 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2716 *mgid = *(union ib_gid *) (mc_map + 4);
2717 }
2718}
2719
2720static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2721 struct cma_multicast *mc)
2722{
2723 struct ib_sa_mcmember_rec rec;
2724 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2725 ib_sa_comp_mask comp_mask;
2726 int ret;
2727
2728 ib_addr_get_mgid(dev_addr, &rec.mgid);
2729 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2730 &rec.mgid, &rec);
2731 if (ret)
2732 return ret;
2733
3f446754 2734 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 2735 if (id_priv->id.ps == RDMA_PS_UDP)
2736 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
6f8372b6 2737 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 2738 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2739 rec.join_state = 1;
2740
2741 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2742 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2743 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2744 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2745 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2746
84adeee9
YE		 2747 if (id_priv->id.ps == RDMA_PS_IPOIB)
2748 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2749 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2750
c8f6a362
SH		 2751 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2752 id_priv->id.port_num, &rec,
2753 comp_mask, GFP_KERNEL,
2754 cma_ib_mc_handler, mc);
2755 if (IS_ERR(mc->multicast.ib))
2756 return PTR_ERR(mc->multicast.ib);
2757
2758 return 0;
2759}
2760
2761int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2762 void *context)
2763{
2764 struct rdma_id_private *id_priv;
2765 struct cma_multicast *mc;
2766 int ret;
2767
2768 id_priv = container_of(id, struct rdma_id_private, id);
2769 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2770 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2771 return -EINVAL;
2772
2773 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2774 if (!mc)
2775 return -ENOMEM;
2776
2777 memcpy(&mc->addr, addr, ip_addr_size(addr));
2778 mc->context = context;
2779 mc->id_priv = id_priv;
2780
2781 spin_lock(&id_priv->lock);
2782 list_add(&mc->list, &id_priv->mc_list);
2783 spin_unlock(&id_priv->lock);
2784
2785 switch (rdma_node_get_transport(id->device->node_type)) {
2786 case RDMA_TRANSPORT_IB:
2787 ret = cma_join_ib_multicast(id_priv, mc);
2788 break;
2789 default:
2790 ret = -ENOSYS;
2791 break;
2792 }
2793
2794 if (ret) {
2795 spin_lock_irq(&id_priv->lock);
2796 list_del(&mc->list);
2797 spin_unlock_irq(&id_priv->lock);
2798 kfree(mc);
2799 }
2800 return ret;
2801}
2802EXPORT_SYMBOL(rdma_join_multicast);
2803
2804void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2805{
2806 struct rdma_id_private *id_priv;
2807 struct cma_multicast *mc;
2808
2809 id_priv = container_of(id, struct rdma_id_private, id);
2810 spin_lock_irq(&id_priv->lock);
2811 list_for_each_entry(mc, &id_priv->mc_list, list) {
2812 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2813 list_del(&mc->list);
2814 spin_unlock_irq(&id_priv->lock);
2815
2816 if (id->qp)
2817 ib_detach_mcast(id->qp,
2818 &mc->multicast.ib->rec.mgid,
2819 mc->multicast.ib->rec.mlid);
2820 ib_sa_free_multicast(mc->multicast.ib);
2821 kfree(mc);
2822 return;
2823 }
2824 }
2825 spin_unlock_irq(&id_priv->lock);
2826}
2827EXPORT_SYMBOL(rdma_leave_multicast);
2828
dd5bdff8
OG		 2829static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
2830{
2831 struct rdma_dev_addr *dev_addr;
2832 struct cma_ndev_work *work;
2833
2834 dev_addr = &id_priv->id.route.addr.dev_addr;
2835
6266ed6e 2836 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 2837 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
2838 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
2839 ndev->name, &id_priv->id);
2840 work = kzalloc(sizeof *work, GFP_KERNEL);
2841 if (!work)
2842 return -ENOMEM;
2843
2844 INIT_WORK(&work->work, cma_ndev_work_handler);
2845 work->id = id_priv;
2846 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
2847 atomic_inc(&id_priv->refcount);
2848 queue_work(cma_wq, &work->work);
2849 }
2850
2851 return 0;
2852}
2853
2854static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
2855 void *ctx)
2856{
2857 struct net_device *ndev = (struct net_device *)ctx;
2858 struct cma_device *cma_dev;
2859 struct rdma_id_private *id_priv;
2860 int ret = NOTIFY_DONE;
2861
2862 if (dev_net(ndev) != &init_net)
2863 return NOTIFY_DONE;
2864
2865 if (event != NETDEV_BONDING_FAILOVER)
2866 return NOTIFY_DONE;
2867
2868 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
2869 return NOTIFY_DONE;
2870
2871 mutex_lock(&lock);
2872 list_for_each_entry(cma_dev, &dev_list, list)
2873 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
2874 ret = cma_netdev_change(ndev, id_priv);
2875 if (ret)
2876 goto out;
2877 }
2878
2879out:
2880 mutex_unlock(&lock);
2881 return ret;
2882}
2883
2884static struct notifier_block cma_nb = {
2885 .notifier_call = cma_netdev_callback
2886};
2887
e51060f0
SH		 2888static void cma_add_one(struct ib_device *device)
2889{
2890 struct cma_device *cma_dev;
2891 struct rdma_id_private *id_priv;
2892
2893 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2894 if (!cma_dev)
2895 return;
2896
2897 cma_dev->device = device;
e51060f0
SH		 2898
2899 init_completion(&cma_dev->comp);
2900 atomic_set(&cma_dev->refcount, 1);
2901 INIT_LIST_HEAD(&cma_dev->id_list);
2902 ib_set_client_data(device, &cma_client, cma_dev);
2903
2904 mutex_lock(&lock);
2905 list_add_tail(&cma_dev->list, &dev_list);
2906 list_for_each_entry(id_priv, &listen_any_list, list)
2907 cma_listen_on_dev(id_priv, cma_dev);
2908 mutex_unlock(&lock);
e51060f0
SH		 2909}
2910
2911static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2912{
a1b1b61f 2913 struct rdma_cm_event event;
e51060f0 2914 enum cma_state state;
de910bd9 2915 int ret = 0;
e51060f0
SH		 2916
2917 /* Record that we want to remove the device */
2918 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2919 if (state == CMA_DESTROYING)
2920 return 0;
2921
2922 cma_cancel_operation(id_priv, state);
de910bd9 2923 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 2924
2925 /* Check for destruction from another callback. */
2926 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
de910bd9 2927 goto out;
e51060f0 2928
a1b1b61f
SH		 2929 memset(&event, 0, sizeof event);
2930 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 2931 ret = id_priv->id.event_handler(&id_priv->id, &event);
2932out:
2933 mutex_unlock(&id_priv->handler_mutex);
2934 return ret;
e51060f0
SH		 2935}
2936
2937static void cma_process_remove(struct cma_device *cma_dev)
2938{
e51060f0
SH		 2939 struct rdma_id_private *id_priv;
2940 int ret;
2941
e51060f0
SH		 2942 mutex_lock(&lock);
2943 while (!list_empty(&cma_dev->id_list)) {
2944 id_priv = list_entry(cma_dev->id_list.next,
2945 struct rdma_id_private, list);
2946
d02d1f53 2947 list_del(&id_priv->listen_list);
94de178a 2948 list_del_init(&id_priv->list);
e51060f0
SH		 2949 atomic_inc(&id_priv->refcount);
2950 mutex_unlock(&lock);
2951
d02d1f53 2952 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 2953 cma_deref_id(id_priv);
2954 if (ret)
2955 rdma_destroy_id(&id_priv->id);
2956
2957 mutex_lock(&lock);
2958 }
2959 mutex_unlock(&lock);
2960
2961 cma_deref_dev(cma_dev);
2962 wait_for_completion(&cma_dev->comp);
2963}
2964
2965static void cma_remove_one(struct ib_device *device)
2966{
2967 struct cma_device *cma_dev;
2968
2969 cma_dev = ib_get_client_data(device, &cma_client);
2970 if (!cma_dev)
2971 return;
2972
2973 mutex_lock(&lock);
2974 list_del(&cma_dev->list);
2975 mutex_unlock(&lock);
2976
2977 cma_process_remove(cma_dev);
2978 kfree(cma_dev);
2979}
2980
716abb1f 2981static int __init cma_init(void)
e51060f0 2982{
5d7220e8 2983 int ret;
227b60f5 2984
c7f743a6 2985 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 2986 if (!cma_wq)
2987 return -ENOMEM;
2988
c1a0b23b 2989 ib_sa_register_client(&sa_client);
7a118df3 2990 rdma_addr_register_client(&addr_client);
dd5bdff8 2991 register_netdevice_notifier(&cma_nb);
c1a0b23b 2992
e51060f0
SH		 2993 ret = ib_register_client(&cma_client);
2994 if (ret)
2995 goto err;
2996 return 0;
2997
2998err:
dd5bdff8 2999 unregister_netdevice_notifier(&cma_nb);
7a118df3 3000 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3001 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3002 destroy_workqueue(cma_wq);
3003 return ret;
3004}
3005
716abb1f 3006static void __exit cma_cleanup(void)
e51060f0
SH		 3007{
3008 ib_unregister_client(&cma_client);
dd5bdff8 3009 unregister_netdevice_notifier(&cma_nb);
7a118df3 3010 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3011 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3012 destroy_workqueue(cma_wq);
3013 idr_destroy(&sdp_ps);
3014 idr_destroy(&tcp_ps);
628e5f6d 3015 idr_destroy(&udp_ps);
c8f6a362 3016 idr_destroy(&ipoib_ps);
e51060f0
SH		 3017}
3018
3019module_init(cma_init);
3020module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)