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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / core / cma.c
CommitLineData
e51060f0
SH		 1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
a9474917
SH		 7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
e51060f0 12 *
a9474917
SH		 13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
e51060f0 16 *
a9474917
SH		 17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
e51060f0 20 *
a9474917
SH		 21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
e51060f0 25 *
a9474917
SH		 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
e51060f0
SH		 34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/idr.h>
07ebafba 42#include <linux/inetdevice.h>
e51060f0
SH		 43
44#include <net/tcp.h>
1f5175ad 45#include <net/ipv6.h>
e51060f0
SH		 46
47#include <rdma/rdma_cm.h>
48#include <rdma/rdma_cm_ib.h>
49#include <rdma/ib_cache.h>
50#include <rdma/ib_cm.h>
51#include <rdma/ib_sa.h>
07ebafba 52#include <rdma/iw_cm.h>
e51060f0
SH		 53
54MODULE_AUTHOR("Sean Hefty");
55MODULE_DESCRIPTION("Generic RDMA CM Agent");
56MODULE_LICENSE("Dual BSD/GPL");
57
58#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 59#define CMA_MAX_CM_RETRIES 15
dcb3f974 60#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
e51060f0
SH		 61
62static void cma_add_one(struct ib_device *device);
63static void cma_remove_one(struct ib_device *device);
64
65static struct ib_client cma_client = {
66 .name = "cma",
67 .add = cma_add_one,
68 .remove = cma_remove_one
69};
70
c1a0b23b 71static struct ib_sa_client sa_client;
7a118df3 72static struct rdma_addr_client addr_client;
e51060f0
SH		 73static LIST_HEAD(dev_list);
74static LIST_HEAD(listen_any_list);
75static DEFINE_MUTEX(lock);
76static struct workqueue_struct *cma_wq;
77static DEFINE_IDR(sdp_ps);
78static DEFINE_IDR(tcp_ps);
628e5f6d 79static DEFINE_IDR(udp_ps);
c8f6a362 80static DEFINE_IDR(ipoib_ps);
aedec080 81static int next_port;
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
1679 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1680 if (!id->route.path_rec) {
1681 ret = -ENOMEM;
1682 goto err;
1683 }
1684
1685 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1686 return 0;
1687err:
1688 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1689 return ret;
1690}
1691EXPORT_SYMBOL(rdma_set_ib_paths);
1692
07ebafba
TT		 1693static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1694{
1695 struct cma_work *work;
1696
1697 work = kzalloc(sizeof *work, GFP_KERNEL);
1698 if (!work)
1699 return -ENOMEM;
1700
1701 work->id = id_priv;
c4028958 1702 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1703 work->old_state = CMA_ROUTE_QUERY;
1704 work->new_state = CMA_ROUTE_RESOLVED;
1705 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1706 queue_work(cma_wq, &work->work);
1707 return 0;
1708}
1709
e51060f0
SH		 1710int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1711{
1712 struct rdma_id_private *id_priv;
1713 int ret;
1714
1715 id_priv = container_of(id, struct rdma_id_private, id);
1716 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1717 return -EINVAL;
1718
1719 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1720 switch (rdma_node_get_transport(id->device->node_type)) {
1721 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1722 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1723 break;
07ebafba
TT		 1724 case RDMA_TRANSPORT_IWARP:
1725 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1726 break;
e51060f0
SH		 1727 default:
1728 ret = -ENOSYS;
1729 break;
1730 }
1731 if (ret)
1732 goto err;
1733
1734 return 0;
1735err:
1736 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1737 cma_deref_id(id_priv);
1738 return ret;
1739}
1740EXPORT_SYMBOL(rdma_resolve_route);
1741
1742static int cma_bind_loopback(struct rdma_id_private *id_priv)
1743{
1744 struct cma_device *cma_dev;
1745 struct ib_port_attr port_attr;
f0ee3404 1746 union ib_gid gid;
e51060f0
SH		 1747 u16 pkey;
1748 int ret;
1749 u8 p;
1750
1751 mutex_lock(&lock);
e82153b5
KK		 1752 if (list_empty(&dev_list)) {
1753 ret = -ENODEV;
1754 goto out;
1755 }
e51060f0
SH		 1756 list_for_each_entry(cma_dev, &dev_list, list)
1757 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1758 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1759 port_attr.state == IB_PORT_ACTIVE)
1760 goto port_found;
1761
e82153b5
KK		 1762 p = 1;
1763 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1764
1765port_found:
f0ee3404 1766 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1767 if (ret)
1768 goto out;
1769
1770 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1771 if (ret)
1772 goto out;
1773
6f8372b6
SH		 1774 id_priv->id.route.addr.dev_addr.dev_type =
1775 (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB) ?
1776 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1777
1778 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1779 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1780 id_priv->id.port_num = p;
1781 cma_attach_to_dev(id_priv, cma_dev);
1782out:
1783 mutex_unlock(&lock);
1784 return ret;
1785}
1786
1787static void addr_handler(int status, struct sockaddr *src_addr,
1788 struct rdma_dev_addr *dev_addr, void *context)
1789{
1790 struct rdma_id_private *id_priv = context;
a1b1b61f 1791 struct rdma_cm_event event;
e51060f0 1792
a1b1b61f 1793 memset(&event, 0, sizeof event);
de910bd9 1794 mutex_lock(&id_priv->handler_mutex);
61a73c70
SH		 1795
1796 /*
1797 * Grab mutex to block rdma_destroy_id() from removing the device while
1798 * we're trying to acquire it.
1799 */
1800 mutex_lock(&lock);
1801 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1802 mutex_unlock(&lock);
1803 goto out;
1804 }
1805
1806 if (!status && !id_priv->cma_dev)
e51060f0 1807 status = cma_acquire_dev(id_priv);
61a73c70 1808 mutex_unlock(&lock);
e51060f0
SH		 1809
1810 if (status) {
61a73c70 1811 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1812 goto out;
a1b1b61f
SH		 1813 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1814 event.status = status;
e51060f0 1815 } else {
e51060f0
SH		 1816 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1817 ip_addr_size(src_addr));
a1b1b61f 1818 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1819 }
1820
a1b1b61f 1821 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1822 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1823 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1824 cma_deref_id(id_priv);
1825 rdma_destroy_id(&id_priv->id);
1826 return;
1827 }
1828out:
de910bd9 1829 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1830 cma_deref_id(id_priv);
1831}
1832
1833static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1834{
1835 struct cma_work *work;
6f8372b6 1836 struct sockaddr *src, *dst;
f0ee3404 1837 union ib_gid gid;
e51060f0
SH		 1838 int ret;
1839
1840 work = kzalloc(sizeof *work, GFP_KERNEL);
1841 if (!work)
1842 return -ENOMEM;
1843
1844 if (!id_priv->cma_dev) {
1845 ret = cma_bind_loopback(id_priv);
1846 if (ret)
1847 goto err;
1848 }
1849
6f8372b6
SH		 1850 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1851 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 1852
6f8372b6
SH		 1853 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1854 if (cma_zero_addr(src)) {
1855 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
1856 if ((src->sa_family = dst->sa_family) == AF_INET) {
1857 ((struct sockaddr_in *) src)->sin_addr.s_addr =
1858 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1859 } else {
1860 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
1861 &((struct sockaddr_in6 *) dst)->sin6_addr);
1862 }
e51060f0
SH		 1863 }
1864
1865 work->id = id_priv;
c4028958 1866 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1867 work->old_state = CMA_ADDR_QUERY;
1868 work->new_state = CMA_ADDR_RESOLVED;
1869 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1870 queue_work(cma_wq, &work->work);
1871 return 0;
1872err:
1873 kfree(work);
1874 return ret;
1875}
1876
1877static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1878 struct sockaddr *dst_addr)
1879{
d14714df
SH		 1880 if (!src_addr || !src_addr->sa_family) {
1881 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
1882 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
1883 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
1884 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
1885 }
1886 }
1887 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 1888}
1889
1890int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1891 struct sockaddr *dst_addr, int timeout_ms)
1892{
1893 struct rdma_id_private *id_priv;
1894 int ret;
1895
1896 id_priv = container_of(id, struct rdma_id_private, id);
1897 if (id_priv->state == CMA_IDLE) {
1898 ret = cma_bind_addr(id, src_addr, dst_addr);
1899 if (ret)
1900 return ret;
1901 }
1902
1903 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1904 return -EINVAL;
1905
1906 atomic_inc(&id_priv->refcount);
1907 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1908 if (cma_any_addr(dst_addr))
1909 ret = cma_resolve_loopback(id_priv);
1910 else
3f446754 1911 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 1912 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1913 timeout_ms, addr_handler, id_priv);
1914 if (ret)
1915 goto err;
1916
1917 return 0;
1918err:
1919 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1920 cma_deref_id(id_priv);
1921 return ret;
1922}
1923EXPORT_SYMBOL(rdma_resolve_addr);
1924
1925static void cma_bind_port(struct rdma_bind_list *bind_list,
1926 struct rdma_id_private *id_priv)
1927{
1928 struct sockaddr_in *sin;
1929
1930 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1931 sin->sin_port = htons(bind_list->port);
1932 id_priv->bind_list = bind_list;
1933 hlist_add_head(&id_priv->node, &bind_list->owners);
1934}
1935
1936static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1937 unsigned short snum)
1938{
1939 struct rdma_bind_list *bind_list;
aedec080 1940 int port, ret;
e51060f0 1941
cb164b8c 1942 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 1943 if (!bind_list)
1944 return -ENOMEM;
1945
aedec080
SH		 1946 do {
1947 ret = idr_get_new_above(ps, bind_list, snum, &port);
1948 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1949
1950 if (ret)
1951 goto err1;
1952
1953 if (port != snum) {
1954 ret = -EADDRNOTAVAIL;
1955 goto err2;
1956 }
1957
1958 bind_list->ps = ps;
1959 bind_list->port = (unsigned short) port;
1960 cma_bind_port(bind_list, id_priv);
1961 return 0;
1962err2:
1963 idr_remove(ps, port);
1964err1:
1965 kfree(bind_list);
1966 return ret;
1967}
e51060f0 1968
aedec080
SH		 1969static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1970{
1971 struct rdma_bind_list *bind_list;
227b60f5 1972 int port, ret, low, high;
aedec080
SH		 1973
1974 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1975 if (!bind_list)
1976 return -ENOMEM;
1977
1978retry:
227b60f5 1979 /* FIXME: add proper port randomization per like inet_csk_get_port */
e51060f0 1980 do {
aedec080 1981 ret = idr_get_new_above(ps, bind_list, next_port, &port);
e51060f0
SH		 1982 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1983
1984 if (ret)
aedec080 1985 goto err1;
e51060f0 1986
227b60f5
SH		 1987 inet_get_local_port_range(&low, &high);
1988 if (port > high) {
1989 if (next_port != low) {
aedec080 1990 idr_remove(ps, port);
227b60f5 1991 next_port = low;
aedec080
SH		 1992 goto retry;
1993 }
e51060f0 1994 ret = -EADDRNOTAVAIL;
aedec080 1995 goto err2;
e51060f0
SH		 1996 }
1997
227b60f5
SH		 1998 if (port == high)
1999 next_port = low;
aedec080
SH		 2000 else
2001 next_port = port + 1;
2002
e51060f0
SH		 2003 bind_list->ps = ps;
2004 bind_list->port = (unsigned short) port;
2005 cma_bind_port(bind_list, id_priv);
2006 return 0;
aedec080
SH		 2007err2:
2008 idr_remove(ps, port);
2009err1:
e51060f0
SH		 2010 kfree(bind_list);
2011 return ret;
2012}
2013
2014static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2015{
2016 struct rdma_id_private *cur_id;
2017 struct sockaddr_in *sin, *cur_sin;
2018 struct rdma_bind_list *bind_list;
2019 struct hlist_node *node;
2020 unsigned short snum;
2021
2022 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2023 snum = ntohs(sin->sin_port);
2024 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2025 return -EACCES;
2026
2027 bind_list = idr_find(ps, snum);
2028 if (!bind_list)
2029 return cma_alloc_port(ps, id_priv, snum);
2030
2031 /*
2032 * We don't support binding to any address if anyone is bound to
2033 * a specific address on the same port.
2034 */
3f446754 2035 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr))
e51060f0
SH		 2036 return -EADDRNOTAVAIL;
2037
2038 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
3f446754 2039 if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr))
e51060f0 2040 return -EADDRNOTAVAIL;
3cd96564 2041
e51060f0
SH		 2042 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
2043 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2044 return -EADDRINUSE;
2045 }
2046
2047 cma_bind_port(bind_list, id_priv);
2048 return 0;
2049}
2050
2051static int cma_get_port(struct rdma_id_private *id_priv)
2052{
2053 struct idr *ps;
2054 int ret;
2055
2056 switch (id_priv->id.ps) {
2057 case RDMA_PS_SDP:
2058 ps = &sdp_ps;
2059 break;
2060 case RDMA_PS_TCP:
2061 ps = &tcp_ps;
2062 break;
628e5f6d
SH		 2063 case RDMA_PS_UDP:
2064 ps = &udp_ps;
2065 break;
c8f6a362
SH		 2066 case RDMA_PS_IPOIB:
2067 ps = &ipoib_ps;
2068 break;
e51060f0
SH		 2069 default:
2070 return -EPROTONOSUPPORT;
2071 }
2072
2073 mutex_lock(&lock);
3f446754 2074 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2075 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2076 else
2077 ret = cma_use_port(ps, id_priv);
2078 mutex_unlock(&lock);
2079
2080 return ret;
2081}
2082
d14714df
SH		 2083static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2084 struct sockaddr *addr)
2085{
fd4582a3 2086#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
d14714df
SH		 2087 struct sockaddr_in6 *sin6;
2088
2089 if (addr->sa_family != AF_INET6)
2090 return 0;
2091
2092 sin6 = (struct sockaddr_in6 *) addr;
2093 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2094 !sin6->sin6_scope_id)
2095 return -EINVAL;
2096
2097 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2098#endif
2099 return 0;
2100}
2101
e51060f0
SH		 2102int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2103{
2104 struct rdma_id_private *id_priv;
2105 int ret;
2106
1f5175ad 2107 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
e51060f0
SH		 2108 return -EAFNOSUPPORT;
2109
2110 id_priv = container_of(id, struct rdma_id_private, id);
2111 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2112 return -EINVAL;
2113
d14714df
SH		 2114 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2115 if (ret)
2116 goto err1;
2117
6f8372b6
SH		 2118 if (cma_loopback_addr(addr)) {
2119 ret = cma_bind_loopback(id_priv);
2120 } else if (!cma_zero_addr(addr)) {
e51060f0 2121 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2122 if (ret)
255d0c14
KK		 2123 goto err1;
2124
2125 mutex_lock(&lock);
2126 ret = cma_acquire_dev(id_priv);
2127 mutex_unlock(&lock);
2128 if (ret)
2129 goto err1;
e51060f0
SH		 2130 }
2131
2132 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2133 ret = cma_get_port(id_priv);
2134 if (ret)
255d0c14 2135 goto err2;
e51060f0
SH		 2136
2137 return 0;
255d0c14 2138err2:
6f8372b6 2139 if (id_priv->cma_dev) {
255d0c14
KK		 2140 mutex_lock(&lock);
2141 cma_detach_from_dev(id_priv);
2142 mutex_unlock(&lock);
2143 }
2144err1:
e51060f0
SH		 2145 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2146 return ret;
2147}
2148EXPORT_SYMBOL(rdma_bind_addr);
2149
2150static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2151 struct rdma_route *route)
2152{
e51060f0
SH		 2153 struct cma_hdr *cma_hdr;
2154 struct sdp_hh *sdp_hdr;
2155
1f5175ad
AS		 2156 if (route->addr.src_addr.ss_family == AF_INET) {
2157 struct sockaddr_in *src4, *dst4;
2158
2159 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2160 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2161
2162 switch (ps) {
2163 case RDMA_PS_SDP:
2164 sdp_hdr = hdr;
2165 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2166 return -EINVAL;
2167 sdp_set_ip_ver(sdp_hdr, 4);
2168 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2169 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2170 sdp_hdr->port = src4->sin_port;
2171 break;
2172 default:
2173 cma_hdr = hdr;
2174 cma_hdr->cma_version = CMA_VERSION;
2175 cma_set_ip_ver(cma_hdr, 4);
2176 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2177 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2178 cma_hdr->port = src4->sin_port;
2179 break;
2180 }
2181 } else {
2182 struct sockaddr_in6 *src6, *dst6;
2183
2184 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2185 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2186
2187 switch (ps) {
2188 case RDMA_PS_SDP:
2189 sdp_hdr = hdr;
2190 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2191 return -EINVAL;
2192 sdp_set_ip_ver(sdp_hdr, 6);
2193 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2194 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2195 sdp_hdr->port = src6->sin6_port;
2196 break;
2197 default:
2198 cma_hdr = hdr;
2199 cma_hdr->cma_version = CMA_VERSION;
2200 cma_set_ip_ver(cma_hdr, 6);
2201 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2202 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2203 cma_hdr->port = src6->sin6_port;
2204 break;
2205 }
e51060f0
SH		 2206 }
2207 return 0;
2208}
2209
628e5f6d
SH		 2210static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2211 struct ib_cm_event *ib_event)
2212{
2213 struct rdma_id_private *id_priv = cm_id->context;
2214 struct rdma_cm_event event;
2215 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2216 int ret = 0;
2217
de910bd9 2218 if (cma_disable_callback(id_priv, CMA_CONNECT))
8aa08602 2219 return 0;
628e5f6d 2220
8aa08602 2221 memset(&event, 0, sizeof event);
628e5f6d
SH		 2222 switch (ib_event->event) {
2223 case IB_CM_SIDR_REQ_ERROR:
2224 event.event = RDMA_CM_EVENT_UNREACHABLE;
2225 event.status = -ETIMEDOUT;
2226 break;
2227 case IB_CM_SIDR_REP_RECEIVED:
2228 event.param.ud.private_data = ib_event->private_data;
2229 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2230 if (rep->status != IB_SIDR_SUCCESS) {
2231 event.event = RDMA_CM_EVENT_UNREACHABLE;
2232 event.status = ib_event->param.sidr_rep_rcvd.status;
2233 break;
2234 }
d2ca39f2
YE		 2235 ret = cma_set_qkey(id_priv);
2236 if (ret) {
2237 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2238 event.status = -EINVAL;
2239 break;
2240 }
c8f6a362 2241 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2242 event.event = RDMA_CM_EVENT_UNREACHABLE;
2243 event.status = -EINVAL;
2244 break;
2245 }
2246 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2247 id_priv->id.route.path_rec,
2248 &event.param.ud.ah_attr);
2249 event.param.ud.qp_num = rep->qpn;
2250 event.param.ud.qkey = rep->qkey;
2251 event.event = RDMA_CM_EVENT_ESTABLISHED;
2252 event.status = 0;
2253 break;
2254 default:
468f2239 2255 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2256 ib_event->event);
2257 goto out;
2258 }
2259
2260 ret = id_priv->id.event_handler(&id_priv->id, &event);
2261 if (ret) {
2262 /* Destroy the CM ID by returning a non-zero value. */
2263 id_priv->cm_id.ib = NULL;
2264 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2265 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2266 rdma_destroy_id(&id_priv->id);
2267 return ret;
2268 }
2269out:
de910bd9 2270 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2271 return ret;
2272}
2273
2274static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2275 struct rdma_conn_param *conn_param)
2276{
2277 struct ib_cm_sidr_req_param req;
2278 struct rdma_route *route;
2279 int ret;
2280
2281 req.private_data_len = sizeof(struct cma_hdr) +
2282 conn_param->private_data_len;
2283 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2284 if (!req.private_data)
2285 return -ENOMEM;
2286
2287 if (conn_param->private_data && conn_param->private_data_len)
2288 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2289 conn_param->private_data, conn_param->private_data_len);
2290
2291 route = &id_priv->id.route;
2292 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2293 if (ret)
2294 goto out;
2295
2296 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2297 cma_sidr_rep_handler, id_priv);
2298 if (IS_ERR(id_priv->cm_id.ib)) {
2299 ret = PTR_ERR(id_priv->cm_id.ib);
2300 goto out;
2301 }
2302
2303 req.path = route->path_rec;
2304 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2305 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2306 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2307 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2308
2309 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2310 if (ret) {
2311 ib_destroy_cm_id(id_priv->cm_id.ib);
2312 id_priv->cm_id.ib = NULL;
2313 }
2314out:
2315 kfree(req.private_data);
2316 return ret;
2317}
2318
e51060f0
SH		 2319static int cma_connect_ib(struct rdma_id_private *id_priv,
2320 struct rdma_conn_param *conn_param)
2321{
2322 struct ib_cm_req_param req;
2323 struct rdma_route *route;
2324 void *private_data;
2325 int offset, ret;
2326
2327 memset(&req, 0, sizeof req);
2328 offset = cma_user_data_offset(id_priv->id.ps);
2329 req.private_data_len = offset + conn_param->private_data_len;
2330 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2331 if (!private_data)
2332 return -ENOMEM;
2333
2334 if (conn_param->private_data && conn_param->private_data_len)
2335 memcpy(private_data + offset, conn_param->private_data,
2336 conn_param->private_data_len);
2337
2338 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2339 id_priv);
2340 if (IS_ERR(id_priv->cm_id.ib)) {
2341 ret = PTR_ERR(id_priv->cm_id.ib);
2342 goto out;
2343 }
2344
2345 route = &id_priv->id.route;
2346 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2347 if (ret)
2348 goto out;
2349 req.private_data = private_data;
2350
2351 req.primary_path = &route->path_rec[0];
2352 if (route->num_paths == 2)
2353 req.alternate_path = &route->path_rec[1];
2354
2355 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2356 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2357 req.qp_num = id_priv->qp_num;
9b2e9c0c 2358 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2359 req.starting_psn = id_priv->seq_num;
2360 req.responder_resources = conn_param->responder_resources;
2361 req.initiator_depth = conn_param->initiator_depth;
2362 req.flow_control = conn_param->flow_control;
2363 req.retry_count = conn_param->retry_count;
2364 req.rnr_retry_count = conn_param->rnr_retry_count;
2365 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2366 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2367 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2368 req.srq = id_priv->srq ? 1 : 0;
2369
2370 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2371out:
675a027c
KK		 2372 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2373 ib_destroy_cm_id(id_priv->cm_id.ib);
2374 id_priv->cm_id.ib = NULL;
2375 }
2376
e51060f0
SH		 2377 kfree(private_data);
2378 return ret;
2379}
2380
07ebafba
TT		 2381static int cma_connect_iw(struct rdma_id_private *id_priv,
2382 struct rdma_conn_param *conn_param)
2383{
2384 struct iw_cm_id *cm_id;
2385 struct sockaddr_in* sin;
2386 int ret;
2387 struct iw_cm_conn_param iw_param;
2388
2389 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2390 if (IS_ERR(cm_id)) {
2391 ret = PTR_ERR(cm_id);
2392 goto out;
2393 }
2394
2395 id_priv->cm_id.iw = cm_id;
2396
2397 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2398 cm_id->local_addr = *sin;
2399
2400 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2401 cm_id->remote_addr = *sin;
2402
5851bb89 2403 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2404 if (ret)
2405 goto out;
07ebafba
TT		 2406
2407 iw_param.ord = conn_param->initiator_depth;
2408 iw_param.ird = conn_param->responder_resources;
2409 iw_param.private_data = conn_param->private_data;
2410 iw_param.private_data_len = conn_param->private_data_len;
2411 if (id_priv->id.qp)
2412 iw_param.qpn = id_priv->qp_num;
2413 else
2414 iw_param.qpn = conn_param->qp_num;
2415 ret = iw_cm_connect(cm_id, &iw_param);
2416out:
675a027c
KK		 2417 if (ret && !IS_ERR(cm_id)) {
2418 iw_destroy_cm_id(cm_id);
2419 id_priv->cm_id.iw = NULL;
2420 }
07ebafba
TT		 2421 return ret;
2422}
2423
e51060f0
SH		 2424int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2425{
2426 struct rdma_id_private *id_priv;
2427 int ret;
2428
2429 id_priv = container_of(id, struct rdma_id_private, id);
2430 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2431 return -EINVAL;
2432
2433 if (!id->qp) {
2434 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2435 id_priv->srq = conn_param->srq;
2436 }
2437
07ebafba
TT		 2438 switch (rdma_node_get_transport(id->device->node_type)) {
2439 case RDMA_TRANSPORT_IB:
c8f6a362 2440 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2441 ret = cma_resolve_ib_udp(id_priv, conn_param);
2442 else
2443 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2444 break;
07ebafba
TT		 2445 case RDMA_TRANSPORT_IWARP:
2446 ret = cma_connect_iw(id_priv, conn_param);
2447 break;
e51060f0
SH		 2448 default:
2449 ret = -ENOSYS;
2450 break;
2451 }
2452 if (ret)
2453 goto err;
2454
2455 return 0;
2456err:
2457 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2458 return ret;
2459}
2460EXPORT_SYMBOL(rdma_connect);
2461
2462static int cma_accept_ib(struct rdma_id_private *id_priv,
2463 struct rdma_conn_param *conn_param)
2464{
2465 struct ib_cm_rep_param rep;
5851bb89 2466 int ret;
0fe313b0 2467
5851bb89
SH		 2468 ret = cma_modify_qp_rtr(id_priv, conn_param);
2469 if (ret)
2470 goto out;
0fe313b0 2471
5851bb89
SH		 2472 ret = cma_modify_qp_rts(id_priv, conn_param);
2473 if (ret)
2474 goto out;
e51060f0
SH		 2475
2476 memset(&rep, 0, sizeof rep);
2477 rep.qp_num = id_priv->qp_num;
2478 rep.starting_psn = id_priv->seq_num;
2479 rep.private_data = conn_param->private_data;
2480 rep.private_data_len = conn_param->private_data_len;
2481 rep.responder_resources = conn_param->responder_resources;
2482 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2483 rep.failover_accepted = 0;
2484 rep.flow_control = conn_param->flow_control;
2485 rep.rnr_retry_count = conn_param->rnr_retry_count;
2486 rep.srq = id_priv->srq ? 1 : 0;
2487
0fe313b0
SH		 2488 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2489out:
2490 return ret;
e51060f0
SH		 2491}
2492
07ebafba
TT		 2493static int cma_accept_iw(struct rdma_id_private *id_priv,
2494 struct rdma_conn_param *conn_param)
2495{
2496 struct iw_cm_conn_param iw_param;
2497 int ret;
2498
5851bb89 2499 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2500 if (ret)
2501 return ret;
2502
2503 iw_param.ord = conn_param->initiator_depth;
2504 iw_param.ird = conn_param->responder_resources;
2505 iw_param.private_data = conn_param->private_data;
2506 iw_param.private_data_len = conn_param->private_data_len;
2507 if (id_priv->id.qp) {
2508 iw_param.qpn = id_priv->qp_num;
2509 } else
2510 iw_param.qpn = conn_param->qp_num;
2511
2512 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2513}
2514
628e5f6d
SH		 2515static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2516 enum ib_cm_sidr_status status,
2517 const void *private_data, int private_data_len)
2518{
2519 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2520 int ret;
628e5f6d
SH		 2521
2522 memset(&rep, 0, sizeof rep);
2523 rep.status = status;
2524 if (status == IB_SIDR_SUCCESS) {
d2ca39f2
YE		 2525 ret = cma_set_qkey(id_priv);
2526 if (ret)
2527 return ret;
628e5f6d 2528 rep.qp_num = id_priv->qp_num;
c8f6a362 2529 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2530 }
2531 rep.private_data = private_data;
2532 rep.private_data_len = private_data_len;
2533
2534 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2535}
2536
e51060f0
SH		 2537int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2538{
2539 struct rdma_id_private *id_priv;
2540 int ret;
2541
2542 id_priv = container_of(id, struct rdma_id_private, id);
2543 if (!cma_comp(id_priv, CMA_CONNECT))
2544 return -EINVAL;
2545
2546 if (!id->qp && conn_param) {
2547 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2548 id_priv->srq = conn_param->srq;
2549 }
2550
07ebafba
TT		 2551 switch (rdma_node_get_transport(id->device->node_type)) {
2552 case RDMA_TRANSPORT_IB:
c8f6a362 2553 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2554 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2555 conn_param->private_data,
2556 conn_param->private_data_len);
2557 else if (conn_param)
e51060f0
SH		 2558 ret = cma_accept_ib(id_priv, conn_param);
2559 else
2560 ret = cma_rep_recv(id_priv);
2561 break;
07ebafba
TT		 2562 case RDMA_TRANSPORT_IWARP:
2563 ret = cma_accept_iw(id_priv, conn_param);
2564 break;
e51060f0
SH		 2565 default:
2566 ret = -ENOSYS;
2567 break;
2568 }
2569
2570 if (ret)
2571 goto reject;
2572
2573 return 0;
2574reject:
c5483388 2575 cma_modify_qp_err(id_priv);
e51060f0
SH		 2576 rdma_reject(id, NULL, 0);
2577 return ret;
2578}
2579EXPORT_SYMBOL(rdma_accept);
2580
0fe313b0
SH		 2581int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2582{
2583 struct rdma_id_private *id_priv;
2584 int ret;
2585
2586 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2587 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2588 return -EINVAL;
2589
2590 switch (id->device->node_type) {
2591 case RDMA_NODE_IB_CA:
2592 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2593 break;
2594 default:
2595 ret = 0;
2596 break;
2597 }
2598 return ret;
2599}
2600EXPORT_SYMBOL(rdma_notify);
2601
e51060f0
SH		 2602int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2603 u8 private_data_len)
2604{
2605 struct rdma_id_private *id_priv;
2606 int ret;
2607
2608 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2609 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2610 return -EINVAL;
2611
07ebafba
TT		 2612 switch (rdma_node_get_transport(id->device->node_type)) {
2613 case RDMA_TRANSPORT_IB:
c8f6a362 2614 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2615 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2616 private_data, private_data_len);
2617 else
2618 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2619 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2620 0, private_data, private_data_len);
e51060f0 2621 break;
07ebafba
TT		 2622 case RDMA_TRANSPORT_IWARP:
2623 ret = iw_cm_reject(id_priv->cm_id.iw,
2624 private_data, private_data_len);
2625 break;
e51060f0
SH		 2626 default:
2627 ret = -ENOSYS;
2628 break;
2629 }
2630 return ret;
2631}
2632EXPORT_SYMBOL(rdma_reject);
2633
2634int rdma_disconnect(struct rdma_cm_id *id)
2635{
2636 struct rdma_id_private *id_priv;
2637 int ret;
2638
2639 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2640 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2641 return -EINVAL;
2642
07ebafba
TT		 2643 switch (rdma_node_get_transport(id->device->node_type)) {
2644 case RDMA_TRANSPORT_IB:
c5483388 2645 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2646 if (ret)
2647 goto out;
e51060f0
SH		 2648 /* Initiate or respond to a disconnect. */
2649 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2650 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2651 break;
07ebafba
TT		 2652 case RDMA_TRANSPORT_IWARP:
2653 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2654 break;
e51060f0 2655 default:
07ebafba 2656 ret = -EINVAL;
e51060f0
SH		 2657 break;
2658 }
2659out:
2660 return ret;
2661}
2662EXPORT_SYMBOL(rdma_disconnect);
2663
c8f6a362
SH		 2664static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2665{
2666 struct rdma_id_private *id_priv;
2667 struct cma_multicast *mc = multicast->context;
2668 struct rdma_cm_event event;
2669 int ret;
2670
2671 id_priv = mc->id_priv;
de910bd9
OG		 2672 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2673 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
8aa08602 2674 return 0;
c8f6a362 2675
c5483388 2676 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2677 if (!status && id_priv->id.qp)
2678 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2679 multicast->rec.mlid);
c5483388 2680 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2681
2682 memset(&event, 0, sizeof event);
2683 event.status = status;
2684 event.param.ud.private_data = mc->context;
2685 if (!status) {
2686 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2687 ib_init_ah_from_mcmember(id_priv->id.device,
2688 id_priv->id.port_num, &multicast->rec,
2689 &event.param.ud.ah_attr);
2690 event.param.ud.qp_num = 0xFFFFFF;
2691 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2692 } else
2693 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2694
2695 ret = id_priv->id.event_handler(&id_priv->id, &event);
2696 if (ret) {
2697 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2698 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2699 rdma_destroy_id(&id_priv->id);
2700 return 0;
2701 }
8aa08602 2702
de910bd9 2703 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2704 return 0;
2705}
2706
2707static void cma_set_mgid(struct rdma_id_private *id_priv,
2708 struct sockaddr *addr, union ib_gid *mgid)
2709{
2710 unsigned char mc_map[MAX_ADDR_LEN];
2711 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2712 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2713 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2714
2715 if (cma_any_addr(addr)) {
2716 memset(mgid, 0, sizeof *mgid);
2717 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 2718 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 2719 0xFF10A01B)) {
2720 /* IPv6 address is an SA assigned MGID. */
2721 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
e2e62697
JG		 2722 } else if ((addr->sa_family == AF_INET6)) {
2723 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2724 if (id_priv->id.ps == RDMA_PS_UDP)
2725 mc_map[7] = 0x01; /* Use RDMA CM signature */
2726 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 2727 } else {
a9e527e3 2728 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2729 if (id_priv->id.ps == RDMA_PS_UDP)
2730 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2731 *mgid = *(union ib_gid *) (mc_map + 4);
2732 }
2733}
2734
2735static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2736 struct cma_multicast *mc)
2737{
2738 struct ib_sa_mcmember_rec rec;
2739 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2740 ib_sa_comp_mask comp_mask;
2741 int ret;
2742
2743 ib_addr_get_mgid(dev_addr, &rec.mgid);
2744 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2745 &rec.mgid, &rec);
2746 if (ret)
2747 return ret;
2748
3f446754 2749 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 2750 if (id_priv->id.ps == RDMA_PS_UDP)
2751 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
6f8372b6 2752 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 2753 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2754 rec.join_state = 1;
2755
2756 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2757 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2758 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2759 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2760 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2761
84adeee9
YE		 2762 if (id_priv->id.ps == RDMA_PS_IPOIB)
2763 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2764 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2765
c8f6a362
SH		 2766 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2767 id_priv->id.port_num, &rec,
2768 comp_mask, GFP_KERNEL,
2769 cma_ib_mc_handler, mc);
2770 if (IS_ERR(mc->multicast.ib))
2771 return PTR_ERR(mc->multicast.ib);
2772
2773 return 0;
2774}
2775
2776int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2777 void *context)
2778{
2779 struct rdma_id_private *id_priv;
2780 struct cma_multicast *mc;
2781 int ret;
2782
2783 id_priv = container_of(id, struct rdma_id_private, id);
2784 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2785 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2786 return -EINVAL;
2787
2788 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2789 if (!mc)
2790 return -ENOMEM;
2791
2792 memcpy(&mc->addr, addr, ip_addr_size(addr));
2793 mc->context = context;
2794 mc->id_priv = id_priv;
2795
2796 spin_lock(&id_priv->lock);
2797 list_add(&mc->list, &id_priv->mc_list);
2798 spin_unlock(&id_priv->lock);
2799
2800 switch (rdma_node_get_transport(id->device->node_type)) {
2801 case RDMA_TRANSPORT_IB:
2802 ret = cma_join_ib_multicast(id_priv, mc);
2803 break;
2804 default:
2805 ret = -ENOSYS;
2806 break;
2807 }
2808
2809 if (ret) {
2810 spin_lock_irq(&id_priv->lock);
2811 list_del(&mc->list);
2812 spin_unlock_irq(&id_priv->lock);
2813 kfree(mc);
2814 }
2815 return ret;
2816}
2817EXPORT_SYMBOL(rdma_join_multicast);
2818
2819void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2820{
2821 struct rdma_id_private *id_priv;
2822 struct cma_multicast *mc;
2823
2824 id_priv = container_of(id, struct rdma_id_private, id);
2825 spin_lock_irq(&id_priv->lock);
2826 list_for_each_entry(mc, &id_priv->mc_list, list) {
2827 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2828 list_del(&mc->list);
2829 spin_unlock_irq(&id_priv->lock);
2830
2831 if (id->qp)
2832 ib_detach_mcast(id->qp,
2833 &mc->multicast.ib->rec.mgid,
2834 mc->multicast.ib->rec.mlid);
2835 ib_sa_free_multicast(mc->multicast.ib);
2836 kfree(mc);
2837 return;
2838 }
2839 }
2840 spin_unlock_irq(&id_priv->lock);
2841}
2842EXPORT_SYMBOL(rdma_leave_multicast);
2843
dd5bdff8
OG		 2844static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
2845{
2846 struct rdma_dev_addr *dev_addr;
2847 struct cma_ndev_work *work;
2848
2849 dev_addr = &id_priv->id.route.addr.dev_addr;
2850
6266ed6e 2851 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 2852 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
2853 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
2854 ndev->name, &id_priv->id);
2855 work = kzalloc(sizeof *work, GFP_KERNEL);
2856 if (!work)
2857 return -ENOMEM;
2858
2859 INIT_WORK(&work->work, cma_ndev_work_handler);
2860 work->id = id_priv;
2861 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
2862 atomic_inc(&id_priv->refcount);
2863 queue_work(cma_wq, &work->work);
2864 }
2865
2866 return 0;
2867}
2868
2869static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
2870 void *ctx)
2871{
2872 struct net_device *ndev = (struct net_device *)ctx;
2873 struct cma_device *cma_dev;
2874 struct rdma_id_private *id_priv;
2875 int ret = NOTIFY_DONE;
2876
2877 if (dev_net(ndev) != &init_net)
2878 return NOTIFY_DONE;
2879
2880 if (event != NETDEV_BONDING_FAILOVER)
2881 return NOTIFY_DONE;
2882
2883 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
2884 return NOTIFY_DONE;
2885
2886 mutex_lock(&lock);
2887 list_for_each_entry(cma_dev, &dev_list, list)
2888 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
2889 ret = cma_netdev_change(ndev, id_priv);
2890 if (ret)
2891 goto out;
2892 }
2893
2894out:
2895 mutex_unlock(&lock);
2896 return ret;
2897}
2898
2899static struct notifier_block cma_nb = {
2900 .notifier_call = cma_netdev_callback
2901};
2902
e51060f0
SH		 2903static void cma_add_one(struct ib_device *device)
2904{
2905 struct cma_device *cma_dev;
2906 struct rdma_id_private *id_priv;
2907
2908 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2909 if (!cma_dev)
2910 return;
2911
2912 cma_dev->device = device;
e51060f0
SH		 2913
2914 init_completion(&cma_dev->comp);
2915 atomic_set(&cma_dev->refcount, 1);
2916 INIT_LIST_HEAD(&cma_dev->id_list);
2917 ib_set_client_data(device, &cma_client, cma_dev);
2918
2919 mutex_lock(&lock);
2920 list_add_tail(&cma_dev->list, &dev_list);
2921 list_for_each_entry(id_priv, &listen_any_list, list)
2922 cma_listen_on_dev(id_priv, cma_dev);
2923 mutex_unlock(&lock);
e51060f0
SH		 2924}
2925
2926static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2927{
a1b1b61f 2928 struct rdma_cm_event event;
e51060f0 2929 enum cma_state state;
de910bd9 2930 int ret = 0;
e51060f0
SH		 2931
2932 /* Record that we want to remove the device */
2933 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2934 if (state == CMA_DESTROYING)
2935 return 0;
2936
2937 cma_cancel_operation(id_priv, state);
de910bd9 2938 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 2939
2940 /* Check for destruction from another callback. */
2941 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
de910bd9 2942 goto out;
e51060f0 2943
a1b1b61f
SH		 2944 memset(&event, 0, sizeof event);
2945 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 2946 ret = id_priv->id.event_handler(&id_priv->id, &event);
2947out:
2948 mutex_unlock(&id_priv->handler_mutex);
2949 return ret;
e51060f0
SH		 2950}
2951
2952static void cma_process_remove(struct cma_device *cma_dev)
2953{
e51060f0
SH		 2954 struct rdma_id_private *id_priv;
2955 int ret;
2956
e51060f0
SH		 2957 mutex_lock(&lock);
2958 while (!list_empty(&cma_dev->id_list)) {
2959 id_priv = list_entry(cma_dev->id_list.next,
2960 struct rdma_id_private, list);
2961
d02d1f53 2962 list_del(&id_priv->listen_list);
94de178a 2963 list_del_init(&id_priv->list);
e51060f0
SH		 2964 atomic_inc(&id_priv->refcount);
2965 mutex_unlock(&lock);
2966
d02d1f53 2967 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 2968 cma_deref_id(id_priv);
2969 if (ret)
2970 rdma_destroy_id(&id_priv->id);
2971
2972 mutex_lock(&lock);
2973 }
2974 mutex_unlock(&lock);
2975
2976 cma_deref_dev(cma_dev);
2977 wait_for_completion(&cma_dev->comp);
2978}
2979
2980static void cma_remove_one(struct ib_device *device)
2981{
2982 struct cma_device *cma_dev;
2983
2984 cma_dev = ib_get_client_data(device, &cma_client);
2985 if (!cma_dev)
2986 return;
2987
2988 mutex_lock(&lock);
2989 list_del(&cma_dev->list);
2990 mutex_unlock(&lock);
2991
2992 cma_process_remove(cma_dev);
2993 kfree(cma_dev);
2994}
2995
716abb1f 2996static int __init cma_init(void)
e51060f0 2997{
a25de534 2998 int ret, low, high, remaining;
e51060f0 2999
aedec080 3000 get_random_bytes(&next_port, sizeof next_port);
227b60f5 3001 inet_get_local_port_range(&low, &high);
a25de534
AA		 3002 remaining = (high - low) + 1;
3003 next_port = ((unsigned int) next_port % remaining) + low;
227b60f5 3004
c7f743a6 3005 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 3006 if (!cma_wq)
3007 return -ENOMEM;
3008
c1a0b23b 3009 ib_sa_register_client(&sa_client);
7a118df3 3010 rdma_addr_register_client(&addr_client);
dd5bdff8 3011 register_netdevice_notifier(&cma_nb);
c1a0b23b 3012
e51060f0
SH		 3013 ret = ib_register_client(&cma_client);
3014 if (ret)
3015 goto err;
3016 return 0;
3017
3018err:
dd5bdff8 3019 unregister_netdevice_notifier(&cma_nb);
7a118df3 3020 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3021 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3022 destroy_workqueue(cma_wq);
3023 return ret;
3024}
3025
716abb1f 3026static void __exit cma_cleanup(void)
e51060f0
SH		 3027{
3028 ib_unregister_client(&cma_client);
dd5bdff8 3029 unregister_netdevice_notifier(&cma_nb);
7a118df3 3030 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3031 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3032 destroy_workqueue(cma_wq);
3033 idr_destroy(&sdp_ps);
3034 idr_destroy(&tcp_ps);
628e5f6d 3035 idr_destroy(&udp_ps);
c8f6a362 3036 idr_destroy(&ipoib_ps);
e51060f0
SH		 3037}
3038
3039module_init(cma_init);
3040module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)