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IB/addr: Simplify resolving IPv4 addresses
[net-next-2.6.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
1475static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1476{
1f5175ad 1477 struct sockaddr_storage addr_in;
e51060f0
SH		 1478
1479 memset(&addr_in, 0, sizeof addr_in);
1f5175ad 1480 addr_in.ss_family = af;
e51060f0
SH		 1481 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1482}
1483
1484int rdma_listen(struct rdma_cm_id *id, int backlog)
1485{
1486 struct rdma_id_private *id_priv;
1487 int ret;
1488
1489 id_priv = container_of(id, struct rdma_id_private, id);
1490 if (id_priv->state == CMA_IDLE) {
1491 ret = cma_bind_any(id, AF_INET);
1492 if (ret)
1493 return ret;
1494 }
1495
1496 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1497 return -EINVAL;
1498
1499 id_priv->backlog = backlog;
1500 if (id->device) {
07ebafba
TT		 1501 switch (rdma_node_get_transport(id->device->node_type)) {
1502 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1503 ret = cma_ib_listen(id_priv);
1504 if (ret)
1505 goto err;
1506 break;
07ebafba
TT		 1507 case RDMA_TRANSPORT_IWARP:
1508 ret = cma_iw_listen(id_priv, backlog);
1509 if (ret)
1510 goto err;
1511 break;
e51060f0
SH		 1512 default:
1513 ret = -ENOSYS;
1514 goto err;
1515 }
1516 } else
1517 cma_listen_on_all(id_priv);
1518
1519 return 0;
1520err:
1521 id_priv->backlog = 0;
1522 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1523 return ret;
1524}
1525EXPORT_SYMBOL(rdma_listen);
1526
a81c994d
SH		 1527void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1528{
1529 struct rdma_id_private *id_priv;
1530
1531 id_priv = container_of(id, struct rdma_id_private, id);
1532 id_priv->tos = (u8) tos;
1533}
1534EXPORT_SYMBOL(rdma_set_service_type);
1535
e51060f0
SH		 1536static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1537 void *context)
1538{
1539 struct cma_work *work = context;
1540 struct rdma_route *route;
1541
1542 route = &work->id->id.route;
1543
1544 if (!status) {
1545 route->num_paths = 1;
1546 *route->path_rec = *path_rec;
1547 } else {
1548 work->old_state = CMA_ROUTE_QUERY;
1549 work->new_state = CMA_ADDR_RESOLVED;
1550 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1551 work->event.status = status;
e51060f0
SH		 1552 }
1553
1554 queue_work(cma_wq, &work->work);
1555}
1556
1557static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1558 struct cma_work *work)
1559{
a81c994d 1560 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1561 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1562 ib_sa_comp_mask comp_mask;
1563 struct sockaddr_in6 *sin6;
e51060f0
SH		 1564
1565 memset(&path_rec, 0, sizeof path_rec);
6f8372b6
SH		 1566 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1567 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
a81c994d 1568 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1569 path_rec.numb_path = 1;
962063e6 1570 path_rec.reversible = 1;
3f446754
RD		 1571 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1572 (struct sockaddr *) &addr->dst_addr);
a81c994d
SH		 1573
1574 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1575 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1576 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1577
3f446754 1578 if (addr->src_addr.ss_family == AF_INET) {
a81c994d
SH		 1579 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1580 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1581 } else {
1582 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1583 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1584 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1585 }
e51060f0 1586
c1a0b23b 1587 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1588 id_priv->id.port_num, &path_rec,
1589 comp_mask, timeout_ms,
1590 GFP_KERNEL, cma_query_handler,
1591 work, &id_priv->query);
e51060f0
SH		 1592
1593 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1594}
1595
c4028958 1596static void cma_work_handler(struct work_struct *_work)
e51060f0 1597{
c4028958 1598 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1599 struct rdma_id_private *id_priv = work->id;
1600 int destroy = 0;
1601
de910bd9 1602 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1603 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1604 goto out;
1605
1606 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1607 cma_exch(id_priv, CMA_DESTROYING);
1608 destroy = 1;
1609 }
1610out:
de910bd9 1611 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1612 cma_deref_id(id_priv);
1613 if (destroy)
1614 rdma_destroy_id(&id_priv->id);
1615 kfree(work);
1616}
1617
dd5bdff8
OG		 1618static void cma_ndev_work_handler(struct work_struct *_work)
1619{
1620 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1621 struct rdma_id_private *id_priv = work->id;
1622 int destroy = 0;
1623
1624 mutex_lock(&id_priv->handler_mutex);
1625 if (id_priv->state == CMA_DESTROYING ||
1626 id_priv->state == CMA_DEVICE_REMOVAL)
1627 goto out;
1628
1629 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1630 cma_exch(id_priv, CMA_DESTROYING);
1631 destroy = 1;
1632 }
1633
1634out:
1635 mutex_unlock(&id_priv->handler_mutex);
1636 cma_deref_id(id_priv);
1637 if (destroy)
1638 rdma_destroy_id(&id_priv->id);
1639 kfree(work);
1640}
1641
e51060f0
SH		 1642static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1643{
1644 struct rdma_route *route = &id_priv->id.route;
1645 struct cma_work *work;
1646 int ret;
1647
1648 work = kzalloc(sizeof *work, GFP_KERNEL);
1649 if (!work)
1650 return -ENOMEM;
1651
1652 work->id = id_priv;
c4028958 1653 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1654 work->old_state = CMA_ROUTE_QUERY;
1655 work->new_state = CMA_ROUTE_RESOLVED;
1656 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1657
1658 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1659 if (!route->path_rec) {
1660 ret = -ENOMEM;
1661 goto err1;
1662 }
1663
1664 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1665 if (ret)
1666 goto err2;
1667
1668 return 0;
1669err2:
1670 kfree(route->path_rec);
1671 route->path_rec = NULL;
1672err1:
1673 kfree(work);
1674 return ret;
1675}
1676
1677int rdma_set_ib_paths(struct rdma_cm_id *id,
1678 struct ib_sa_path_rec *path_rec, int num_paths)
1679{
1680 struct rdma_id_private *id_priv;
1681 int ret;
1682
1683 id_priv = container_of(id, struct rdma_id_private, id);
1684 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1685 return -EINVAL;
1686
1687 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1688 if (!id->route.path_rec) {
1689 ret = -ENOMEM;
1690 goto err;
1691 }
1692
1693 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1694 return 0;
1695err:
1696 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1697 return ret;
1698}
1699EXPORT_SYMBOL(rdma_set_ib_paths);
1700
07ebafba
TT		 1701static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1702{
1703 struct cma_work *work;
1704
1705 work = kzalloc(sizeof *work, GFP_KERNEL);
1706 if (!work)
1707 return -ENOMEM;
1708
1709 work->id = id_priv;
c4028958 1710 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1711 work->old_state = CMA_ROUTE_QUERY;
1712 work->new_state = CMA_ROUTE_RESOLVED;
1713 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1714 queue_work(cma_wq, &work->work);
1715 return 0;
1716}
1717
e51060f0
SH		 1718int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1719{
1720 struct rdma_id_private *id_priv;
1721 int ret;
1722
1723 id_priv = container_of(id, struct rdma_id_private, id);
1724 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1725 return -EINVAL;
1726
1727 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1728 switch (rdma_node_get_transport(id->device->node_type)) {
1729 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1730 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1731 break;
07ebafba
TT		 1732 case RDMA_TRANSPORT_IWARP:
1733 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1734 break;
e51060f0
SH		 1735 default:
1736 ret = -ENOSYS;
1737 break;
1738 }
1739 if (ret)
1740 goto err;
1741
1742 return 0;
1743err:
1744 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1745 cma_deref_id(id_priv);
1746 return ret;
1747}
1748EXPORT_SYMBOL(rdma_resolve_route);
1749
1750static int cma_bind_loopback(struct rdma_id_private *id_priv)
1751{
1752 struct cma_device *cma_dev;
1753 struct ib_port_attr port_attr;
f0ee3404 1754 union ib_gid gid;
e51060f0
SH		 1755 u16 pkey;
1756 int ret;
1757 u8 p;
1758
1759 mutex_lock(&lock);
e82153b5
KK		 1760 if (list_empty(&dev_list)) {
1761 ret = -ENODEV;
1762 goto out;
1763 }
e51060f0
SH		 1764 list_for_each_entry(cma_dev, &dev_list, list)
1765 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1766 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1767 port_attr.state == IB_PORT_ACTIVE)
1768 goto port_found;
1769
e82153b5
KK		 1770 p = 1;
1771 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1772
1773port_found:
f0ee3404 1774 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1775 if (ret)
1776 goto out;
1777
1778 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1779 if (ret)
1780 goto out;
1781
6f8372b6
SH		 1782 id_priv->id.route.addr.dev_addr.dev_type =
1783 (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB) ?
1784 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1785
1786 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1787 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1788 id_priv->id.port_num = p;
1789 cma_attach_to_dev(id_priv, cma_dev);
1790out:
1791 mutex_unlock(&lock);
1792 return ret;
1793}
1794
1795static void addr_handler(int status, struct sockaddr *src_addr,
1796 struct rdma_dev_addr *dev_addr, void *context)
1797{
1798 struct rdma_id_private *id_priv = context;
a1b1b61f 1799 struct rdma_cm_event event;
e51060f0 1800
a1b1b61f 1801 memset(&event, 0, sizeof event);
de910bd9 1802 mutex_lock(&id_priv->handler_mutex);
61a73c70
SH		 1803
1804 /*
1805 * Grab mutex to block rdma_destroy_id() from removing the device while
1806 * we're trying to acquire it.
1807 */
1808 mutex_lock(&lock);
1809 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1810 mutex_unlock(&lock);
1811 goto out;
1812 }
1813
1814 if (!status && !id_priv->cma_dev)
e51060f0 1815 status = cma_acquire_dev(id_priv);
61a73c70 1816 mutex_unlock(&lock);
e51060f0
SH		 1817
1818 if (status) {
61a73c70 1819 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1820 goto out;
a1b1b61f
SH		 1821 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1822 event.status = status;
e51060f0 1823 } else {
e51060f0
SH		 1824 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1825 ip_addr_size(src_addr));
a1b1b61f 1826 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1827 }
1828
a1b1b61f 1829 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1830 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1831 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1832 cma_deref_id(id_priv);
1833 rdma_destroy_id(&id_priv->id);
1834 return;
1835 }
1836out:
de910bd9 1837 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1838 cma_deref_id(id_priv);
1839}
1840
1841static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1842{
1843 struct cma_work *work;
6f8372b6 1844 struct sockaddr *src, *dst;
f0ee3404 1845 union ib_gid gid;
e51060f0
SH		 1846 int ret;
1847
1848 work = kzalloc(sizeof *work, GFP_KERNEL);
1849 if (!work)
1850 return -ENOMEM;
1851
1852 if (!id_priv->cma_dev) {
1853 ret = cma_bind_loopback(id_priv);
1854 if (ret)
1855 goto err;
1856 }
1857
6f8372b6
SH		 1858 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1859 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 1860
6f8372b6
SH		 1861 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1862 if (cma_zero_addr(src)) {
1863 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
1864 if ((src->sa_family = dst->sa_family) == AF_INET) {
1865 ((struct sockaddr_in *) src)->sin_addr.s_addr =
1866 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1867 } else {
1868 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
1869 &((struct sockaddr_in6 *) dst)->sin6_addr);
1870 }
e51060f0
SH		 1871 }
1872
1873 work->id = id_priv;
c4028958 1874 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1875 work->old_state = CMA_ADDR_QUERY;
1876 work->new_state = CMA_ADDR_RESOLVED;
1877 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1878 queue_work(cma_wq, &work->work);
1879 return 0;
1880err:
1881 kfree(work);
1882 return ret;
1883}
1884
1885static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1886 struct sockaddr *dst_addr)
1887{
1888 if (src_addr && src_addr->sa_family)
1889 return rdma_bind_addr(id, src_addr);
1890 else
1891 return cma_bind_any(id, dst_addr->sa_family);
1892}
1893
1894int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1895 struct sockaddr *dst_addr, int timeout_ms)
1896{
1897 struct rdma_id_private *id_priv;
1898 int ret;
1899
1900 id_priv = container_of(id, struct rdma_id_private, id);
1901 if (id_priv->state == CMA_IDLE) {
1902 ret = cma_bind_addr(id, src_addr, dst_addr);
1903 if (ret)
1904 return ret;
1905 }
1906
1907 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1908 return -EINVAL;
1909
1910 atomic_inc(&id_priv->refcount);
1911 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1912 if (cma_any_addr(dst_addr))
1913 ret = cma_resolve_loopback(id_priv);
1914 else
3f446754 1915 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 1916 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1917 timeout_ms, addr_handler, id_priv);
1918 if (ret)
1919 goto err;
1920
1921 return 0;
1922err:
1923 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1924 cma_deref_id(id_priv);
1925 return ret;
1926}
1927EXPORT_SYMBOL(rdma_resolve_addr);
1928
1929static void cma_bind_port(struct rdma_bind_list *bind_list,
1930 struct rdma_id_private *id_priv)
1931{
1932 struct sockaddr_in *sin;
1933
1934 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1935 sin->sin_port = htons(bind_list->port);
1936 id_priv->bind_list = bind_list;
1937 hlist_add_head(&id_priv->node, &bind_list->owners);
1938}
1939
1940static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1941 unsigned short snum)
1942{
1943 struct rdma_bind_list *bind_list;
aedec080 1944 int port, ret;
e51060f0 1945
cb164b8c 1946 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 1947 if (!bind_list)
1948 return -ENOMEM;
1949
aedec080
SH		 1950 do {
1951 ret = idr_get_new_above(ps, bind_list, snum, &port);
1952 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1953
1954 if (ret)
1955 goto err1;
1956
1957 if (port != snum) {
1958 ret = -EADDRNOTAVAIL;
1959 goto err2;
1960 }
1961
1962 bind_list->ps = ps;
1963 bind_list->port = (unsigned short) port;
1964 cma_bind_port(bind_list, id_priv);
1965 return 0;
1966err2:
1967 idr_remove(ps, port);
1968err1:
1969 kfree(bind_list);
1970 return ret;
1971}
e51060f0 1972
aedec080
SH		 1973static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1974{
1975 struct rdma_bind_list *bind_list;
227b60f5 1976 int port, ret, low, high;
aedec080
SH		 1977
1978 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1979 if (!bind_list)
1980 return -ENOMEM;
1981
1982retry:
227b60f5 1983 /* FIXME: add proper port randomization per like inet_csk_get_port */
e51060f0 1984 do {
aedec080 1985 ret = idr_get_new_above(ps, bind_list, next_port, &port);
e51060f0
SH		 1986 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1987
1988 if (ret)
aedec080 1989 goto err1;
e51060f0 1990
227b60f5
SH		 1991 inet_get_local_port_range(&low, &high);
1992 if (port > high) {
1993 if (next_port != low) {
aedec080 1994 idr_remove(ps, port);
227b60f5 1995 next_port = low;
aedec080
SH		 1996 goto retry;
1997 }
e51060f0 1998 ret = -EADDRNOTAVAIL;
aedec080 1999 goto err2;
e51060f0
SH		 2000 }
2001
227b60f5
SH		 2002 if (port == high)
2003 next_port = low;
aedec080
SH		 2004 else
2005 next_port = port + 1;
2006
e51060f0
SH		 2007 bind_list->ps = ps;
2008 bind_list->port = (unsigned short) port;
2009 cma_bind_port(bind_list, id_priv);
2010 return 0;
aedec080
SH		 2011err2:
2012 idr_remove(ps, port);
2013err1:
e51060f0
SH		 2014 kfree(bind_list);
2015 return ret;
2016}
2017
2018static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2019{
2020 struct rdma_id_private *cur_id;
2021 struct sockaddr_in *sin, *cur_sin;
2022 struct rdma_bind_list *bind_list;
2023 struct hlist_node *node;
2024 unsigned short snum;
2025
2026 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2027 snum = ntohs(sin->sin_port);
2028 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2029 return -EACCES;
2030
2031 bind_list = idr_find(ps, snum);
2032 if (!bind_list)
2033 return cma_alloc_port(ps, id_priv, snum);
2034
2035 /*
2036 * We don't support binding to any address if anyone is bound to
2037 * a specific address on the same port.
2038 */
3f446754 2039 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr))
e51060f0
SH		 2040 return -EADDRNOTAVAIL;
2041
2042 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
3f446754 2043 if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr))
e51060f0 2044 return -EADDRNOTAVAIL;
3cd96564 2045
e51060f0
SH		 2046 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
2047 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2048 return -EADDRINUSE;
2049 }
2050
2051 cma_bind_port(bind_list, id_priv);
2052 return 0;
2053}
2054
2055static int cma_get_port(struct rdma_id_private *id_priv)
2056{
2057 struct idr *ps;
2058 int ret;
2059
2060 switch (id_priv->id.ps) {
2061 case RDMA_PS_SDP:
2062 ps = &sdp_ps;
2063 break;
2064 case RDMA_PS_TCP:
2065 ps = &tcp_ps;
2066 break;
628e5f6d
SH		 2067 case RDMA_PS_UDP:
2068 ps = &udp_ps;
2069 break;
c8f6a362
SH		 2070 case RDMA_PS_IPOIB:
2071 ps = &ipoib_ps;
2072 break;
e51060f0
SH		 2073 default:
2074 return -EPROTONOSUPPORT;
2075 }
2076
2077 mutex_lock(&lock);
3f446754 2078 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2079 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2080 else
2081 ret = cma_use_port(ps, id_priv);
2082 mutex_unlock(&lock);
2083
2084 return ret;
2085}
2086
2087int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2088{
2089 struct rdma_id_private *id_priv;
2090 int ret;
2091
1f5175ad 2092 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
e51060f0
SH		 2093 return -EAFNOSUPPORT;
2094
2095 id_priv = container_of(id, struct rdma_id_private, id);
2096 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2097 return -EINVAL;
2098
6f8372b6
SH		 2099 if (cma_loopback_addr(addr)) {
2100 ret = cma_bind_loopback(id_priv);
2101 } else if (!cma_zero_addr(addr)) {
e51060f0 2102 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2103 if (ret)
255d0c14
KK		 2104 goto err1;
2105
2106 mutex_lock(&lock);
2107 ret = cma_acquire_dev(id_priv);
2108 mutex_unlock(&lock);
2109 if (ret)
2110 goto err1;
e51060f0
SH		 2111 }
2112
2113 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2114 ret = cma_get_port(id_priv);
2115 if (ret)
255d0c14 2116 goto err2;
e51060f0
SH		 2117
2118 return 0;
255d0c14 2119err2:
6f8372b6 2120 if (id_priv->cma_dev) {
255d0c14
KK		 2121 mutex_lock(&lock);
2122 cma_detach_from_dev(id_priv);
2123 mutex_unlock(&lock);
2124 }
2125err1:
e51060f0
SH		 2126 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2127 return ret;
2128}
2129EXPORT_SYMBOL(rdma_bind_addr);
2130
2131static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2132 struct rdma_route *route)
2133{
e51060f0
SH		 2134 struct cma_hdr *cma_hdr;
2135 struct sdp_hh *sdp_hdr;
2136
1f5175ad
AS		 2137 if (route->addr.src_addr.ss_family == AF_INET) {
2138 struct sockaddr_in *src4, *dst4;
2139
2140 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2141 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2142
2143 switch (ps) {
2144 case RDMA_PS_SDP:
2145 sdp_hdr = hdr;
2146 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2147 return -EINVAL;
2148 sdp_set_ip_ver(sdp_hdr, 4);
2149 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2150 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2151 sdp_hdr->port = src4->sin_port;
2152 break;
2153 default:
2154 cma_hdr = hdr;
2155 cma_hdr->cma_version = CMA_VERSION;
2156 cma_set_ip_ver(cma_hdr, 4);
2157 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2158 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2159 cma_hdr->port = src4->sin_port;
2160 break;
2161 }
2162 } else {
2163 struct sockaddr_in6 *src6, *dst6;
2164
2165 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2166 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2167
2168 switch (ps) {
2169 case RDMA_PS_SDP:
2170 sdp_hdr = hdr;
2171 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2172 return -EINVAL;
2173 sdp_set_ip_ver(sdp_hdr, 6);
2174 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2175 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2176 sdp_hdr->port = src6->sin6_port;
2177 break;
2178 default:
2179 cma_hdr = hdr;
2180 cma_hdr->cma_version = CMA_VERSION;
2181 cma_set_ip_ver(cma_hdr, 6);
2182 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2183 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2184 cma_hdr->port = src6->sin6_port;
2185 break;
2186 }
e51060f0
SH		 2187 }
2188 return 0;
2189}
2190
628e5f6d
SH		 2191static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2192 struct ib_cm_event *ib_event)
2193{
2194 struct rdma_id_private *id_priv = cm_id->context;
2195 struct rdma_cm_event event;
2196 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2197 int ret = 0;
2198
de910bd9 2199 if (cma_disable_callback(id_priv, CMA_CONNECT))
8aa08602 2200 return 0;
628e5f6d 2201
8aa08602 2202 memset(&event, 0, sizeof event);
628e5f6d
SH		 2203 switch (ib_event->event) {
2204 case IB_CM_SIDR_REQ_ERROR:
2205 event.event = RDMA_CM_EVENT_UNREACHABLE;
2206 event.status = -ETIMEDOUT;
2207 break;
2208 case IB_CM_SIDR_REP_RECEIVED:
2209 event.param.ud.private_data = ib_event->private_data;
2210 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2211 if (rep->status != IB_SIDR_SUCCESS) {
2212 event.event = RDMA_CM_EVENT_UNREACHABLE;
2213 event.status = ib_event->param.sidr_rep_rcvd.status;
2214 break;
2215 }
d2ca39f2
YE		 2216 ret = cma_set_qkey(id_priv);
2217 if (ret) {
2218 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2219 event.status = -EINVAL;
2220 break;
2221 }
c8f6a362 2222 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2223 event.event = RDMA_CM_EVENT_UNREACHABLE;
2224 event.status = -EINVAL;
2225 break;
2226 }
2227 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2228 id_priv->id.route.path_rec,
2229 &event.param.ud.ah_attr);
2230 event.param.ud.qp_num = rep->qpn;
2231 event.param.ud.qkey = rep->qkey;
2232 event.event = RDMA_CM_EVENT_ESTABLISHED;
2233 event.status = 0;
2234 break;
2235 default:
468f2239 2236 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2237 ib_event->event);
2238 goto out;
2239 }
2240
2241 ret = id_priv->id.event_handler(&id_priv->id, &event);
2242 if (ret) {
2243 /* Destroy the CM ID by returning a non-zero value. */
2244 id_priv->cm_id.ib = NULL;
2245 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2246 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2247 rdma_destroy_id(&id_priv->id);
2248 return ret;
2249 }
2250out:
de910bd9 2251 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2252 return ret;
2253}
2254
2255static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2256 struct rdma_conn_param *conn_param)
2257{
2258 struct ib_cm_sidr_req_param req;
2259 struct rdma_route *route;
2260 int ret;
2261
2262 req.private_data_len = sizeof(struct cma_hdr) +
2263 conn_param->private_data_len;
2264 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2265 if (!req.private_data)
2266 return -ENOMEM;
2267
2268 if (conn_param->private_data && conn_param->private_data_len)
2269 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2270 conn_param->private_data, conn_param->private_data_len);
2271
2272 route = &id_priv->id.route;
2273 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2274 if (ret)
2275 goto out;
2276
2277 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2278 cma_sidr_rep_handler, id_priv);
2279 if (IS_ERR(id_priv->cm_id.ib)) {
2280 ret = PTR_ERR(id_priv->cm_id.ib);
2281 goto out;
2282 }
2283
2284 req.path = route->path_rec;
2285 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2286 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2287 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2288 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2289
2290 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2291 if (ret) {
2292 ib_destroy_cm_id(id_priv->cm_id.ib);
2293 id_priv->cm_id.ib = NULL;
2294 }
2295out:
2296 kfree(req.private_data);
2297 return ret;
2298}
2299
e51060f0
SH		 2300static int cma_connect_ib(struct rdma_id_private *id_priv,
2301 struct rdma_conn_param *conn_param)
2302{
2303 struct ib_cm_req_param req;
2304 struct rdma_route *route;
2305 void *private_data;
2306 int offset, ret;
2307
2308 memset(&req, 0, sizeof req);
2309 offset = cma_user_data_offset(id_priv->id.ps);
2310 req.private_data_len = offset + conn_param->private_data_len;
2311 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2312 if (!private_data)
2313 return -ENOMEM;
2314
2315 if (conn_param->private_data && conn_param->private_data_len)
2316 memcpy(private_data + offset, conn_param->private_data,
2317 conn_param->private_data_len);
2318
2319 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2320 id_priv);
2321 if (IS_ERR(id_priv->cm_id.ib)) {
2322 ret = PTR_ERR(id_priv->cm_id.ib);
2323 goto out;
2324 }
2325
2326 route = &id_priv->id.route;
2327 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2328 if (ret)
2329 goto out;
2330 req.private_data = private_data;
2331
2332 req.primary_path = &route->path_rec[0];
2333 if (route->num_paths == 2)
2334 req.alternate_path = &route->path_rec[1];
2335
2336 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2337 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2338 req.qp_num = id_priv->qp_num;
9b2e9c0c 2339 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2340 req.starting_psn = id_priv->seq_num;
2341 req.responder_resources = conn_param->responder_resources;
2342 req.initiator_depth = conn_param->initiator_depth;
2343 req.flow_control = conn_param->flow_control;
2344 req.retry_count = conn_param->retry_count;
2345 req.rnr_retry_count = conn_param->rnr_retry_count;
2346 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2347 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2348 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2349 req.srq = id_priv->srq ? 1 : 0;
2350
2351 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2352out:
675a027c
KK		 2353 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2354 ib_destroy_cm_id(id_priv->cm_id.ib);
2355 id_priv->cm_id.ib = NULL;
2356 }
2357
e51060f0
SH		 2358 kfree(private_data);
2359 return ret;
2360}
2361
07ebafba
TT		 2362static int cma_connect_iw(struct rdma_id_private *id_priv,
2363 struct rdma_conn_param *conn_param)
2364{
2365 struct iw_cm_id *cm_id;
2366 struct sockaddr_in* sin;
2367 int ret;
2368 struct iw_cm_conn_param iw_param;
2369
2370 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2371 if (IS_ERR(cm_id)) {
2372 ret = PTR_ERR(cm_id);
2373 goto out;
2374 }
2375
2376 id_priv->cm_id.iw = cm_id;
2377
2378 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2379 cm_id->local_addr = *sin;
2380
2381 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2382 cm_id->remote_addr = *sin;
2383
5851bb89 2384 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2385 if (ret)
2386 goto out;
07ebafba
TT		 2387
2388 iw_param.ord = conn_param->initiator_depth;
2389 iw_param.ird = conn_param->responder_resources;
2390 iw_param.private_data = conn_param->private_data;
2391 iw_param.private_data_len = conn_param->private_data_len;
2392 if (id_priv->id.qp)
2393 iw_param.qpn = id_priv->qp_num;
2394 else
2395 iw_param.qpn = conn_param->qp_num;
2396 ret = iw_cm_connect(cm_id, &iw_param);
2397out:
675a027c
KK		 2398 if (ret && !IS_ERR(cm_id)) {
2399 iw_destroy_cm_id(cm_id);
2400 id_priv->cm_id.iw = NULL;
2401 }
07ebafba
TT		 2402 return ret;
2403}
2404
e51060f0
SH		 2405int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2406{
2407 struct rdma_id_private *id_priv;
2408 int ret;
2409
2410 id_priv = container_of(id, struct rdma_id_private, id);
2411 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2412 return -EINVAL;
2413
2414 if (!id->qp) {
2415 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2416 id_priv->srq = conn_param->srq;
2417 }
2418
07ebafba
TT		 2419 switch (rdma_node_get_transport(id->device->node_type)) {
2420 case RDMA_TRANSPORT_IB:
c8f6a362 2421 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2422 ret = cma_resolve_ib_udp(id_priv, conn_param);
2423 else
2424 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2425 break;
07ebafba
TT		 2426 case RDMA_TRANSPORT_IWARP:
2427 ret = cma_connect_iw(id_priv, conn_param);
2428 break;
e51060f0
SH		 2429 default:
2430 ret = -ENOSYS;
2431 break;
2432 }
2433 if (ret)
2434 goto err;
2435
2436 return 0;
2437err:
2438 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2439 return ret;
2440}
2441EXPORT_SYMBOL(rdma_connect);
2442
2443static int cma_accept_ib(struct rdma_id_private *id_priv,
2444 struct rdma_conn_param *conn_param)
2445{
2446 struct ib_cm_rep_param rep;
5851bb89 2447 int ret;
0fe313b0 2448
5851bb89
SH		 2449 ret = cma_modify_qp_rtr(id_priv, conn_param);
2450 if (ret)
2451 goto out;
0fe313b0 2452
5851bb89
SH		 2453 ret = cma_modify_qp_rts(id_priv, conn_param);
2454 if (ret)
2455 goto out;
e51060f0
SH		 2456
2457 memset(&rep, 0, sizeof rep);
2458 rep.qp_num = id_priv->qp_num;
2459 rep.starting_psn = id_priv->seq_num;
2460 rep.private_data = conn_param->private_data;
2461 rep.private_data_len = conn_param->private_data_len;
2462 rep.responder_resources = conn_param->responder_resources;
2463 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2464 rep.failover_accepted = 0;
2465 rep.flow_control = conn_param->flow_control;
2466 rep.rnr_retry_count = conn_param->rnr_retry_count;
2467 rep.srq = id_priv->srq ? 1 : 0;
2468
0fe313b0
SH		 2469 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2470out:
2471 return ret;
e51060f0
SH		 2472}
2473
07ebafba
TT		 2474static int cma_accept_iw(struct rdma_id_private *id_priv,
2475 struct rdma_conn_param *conn_param)
2476{
2477 struct iw_cm_conn_param iw_param;
2478 int ret;
2479
5851bb89 2480 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2481 if (ret)
2482 return ret;
2483
2484 iw_param.ord = conn_param->initiator_depth;
2485 iw_param.ird = conn_param->responder_resources;
2486 iw_param.private_data = conn_param->private_data;
2487 iw_param.private_data_len = conn_param->private_data_len;
2488 if (id_priv->id.qp) {
2489 iw_param.qpn = id_priv->qp_num;
2490 } else
2491 iw_param.qpn = conn_param->qp_num;
2492
2493 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2494}
2495
628e5f6d
SH		 2496static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2497 enum ib_cm_sidr_status status,
2498 const void *private_data, int private_data_len)
2499{
2500 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2501 int ret;
628e5f6d
SH		 2502
2503 memset(&rep, 0, sizeof rep);
2504 rep.status = status;
2505 if (status == IB_SIDR_SUCCESS) {
d2ca39f2
YE		 2506 ret = cma_set_qkey(id_priv);
2507 if (ret)
2508 return ret;
628e5f6d 2509 rep.qp_num = id_priv->qp_num;
c8f6a362 2510 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2511 }
2512 rep.private_data = private_data;
2513 rep.private_data_len = private_data_len;
2514
2515 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2516}
2517
e51060f0
SH		 2518int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2519{
2520 struct rdma_id_private *id_priv;
2521 int ret;
2522
2523 id_priv = container_of(id, struct rdma_id_private, id);
2524 if (!cma_comp(id_priv, CMA_CONNECT))
2525 return -EINVAL;
2526
2527 if (!id->qp && conn_param) {
2528 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2529 id_priv->srq = conn_param->srq;
2530 }
2531
07ebafba
TT		 2532 switch (rdma_node_get_transport(id->device->node_type)) {
2533 case RDMA_TRANSPORT_IB:
c8f6a362 2534 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2535 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2536 conn_param->private_data,
2537 conn_param->private_data_len);
2538 else if (conn_param)
e51060f0
SH		 2539 ret = cma_accept_ib(id_priv, conn_param);
2540 else
2541 ret = cma_rep_recv(id_priv);
2542 break;
07ebafba
TT		 2543 case RDMA_TRANSPORT_IWARP:
2544 ret = cma_accept_iw(id_priv, conn_param);
2545 break;
e51060f0
SH		 2546 default:
2547 ret = -ENOSYS;
2548 break;
2549 }
2550
2551 if (ret)
2552 goto reject;
2553
2554 return 0;
2555reject:
c5483388 2556 cma_modify_qp_err(id_priv);
e51060f0
SH		 2557 rdma_reject(id, NULL, 0);
2558 return ret;
2559}
2560EXPORT_SYMBOL(rdma_accept);
2561
0fe313b0
SH		 2562int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2563{
2564 struct rdma_id_private *id_priv;
2565 int ret;
2566
2567 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2568 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2569 return -EINVAL;
2570
2571 switch (id->device->node_type) {
2572 case RDMA_NODE_IB_CA:
2573 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2574 break;
2575 default:
2576 ret = 0;
2577 break;
2578 }
2579 return ret;
2580}
2581EXPORT_SYMBOL(rdma_notify);
2582
e51060f0
SH		 2583int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2584 u8 private_data_len)
2585{
2586 struct rdma_id_private *id_priv;
2587 int ret;
2588
2589 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2590 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2591 return -EINVAL;
2592
07ebafba
TT		 2593 switch (rdma_node_get_transport(id->device->node_type)) {
2594 case RDMA_TRANSPORT_IB:
c8f6a362 2595 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2596 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2597 private_data, private_data_len);
2598 else
2599 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2600 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2601 0, private_data, private_data_len);
e51060f0 2602 break;
07ebafba
TT		 2603 case RDMA_TRANSPORT_IWARP:
2604 ret = iw_cm_reject(id_priv->cm_id.iw,
2605 private_data, private_data_len);
2606 break;
e51060f0
SH		 2607 default:
2608 ret = -ENOSYS;
2609 break;
2610 }
2611 return ret;
2612}
2613EXPORT_SYMBOL(rdma_reject);
2614
2615int rdma_disconnect(struct rdma_cm_id *id)
2616{
2617 struct rdma_id_private *id_priv;
2618 int ret;
2619
2620 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2621 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2622 return -EINVAL;
2623
07ebafba
TT		 2624 switch (rdma_node_get_transport(id->device->node_type)) {
2625 case RDMA_TRANSPORT_IB:
c5483388 2626 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2627 if (ret)
2628 goto out;
e51060f0
SH		 2629 /* Initiate or respond to a disconnect. */
2630 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2631 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2632 break;
07ebafba
TT		 2633 case RDMA_TRANSPORT_IWARP:
2634 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2635 break;
e51060f0 2636 default:
07ebafba 2637 ret = -EINVAL;
e51060f0
SH		 2638 break;
2639 }
2640out:
2641 return ret;
2642}
2643EXPORT_SYMBOL(rdma_disconnect);
2644
c8f6a362
SH		 2645static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2646{
2647 struct rdma_id_private *id_priv;
2648 struct cma_multicast *mc = multicast->context;
2649 struct rdma_cm_event event;
2650 int ret;
2651
2652 id_priv = mc->id_priv;
de910bd9
OG		 2653 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2654 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
8aa08602 2655 return 0;
c8f6a362 2656
c5483388 2657 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2658 if (!status && id_priv->id.qp)
2659 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2660 multicast->rec.mlid);
c5483388 2661 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2662
2663 memset(&event, 0, sizeof event);
2664 event.status = status;
2665 event.param.ud.private_data = mc->context;
2666 if (!status) {
2667 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2668 ib_init_ah_from_mcmember(id_priv->id.device,
2669 id_priv->id.port_num, &multicast->rec,
2670 &event.param.ud.ah_attr);
2671 event.param.ud.qp_num = 0xFFFFFF;
2672 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2673 } else
2674 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2675
2676 ret = id_priv->id.event_handler(&id_priv->id, &event);
2677 if (ret) {
2678 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2679 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2680 rdma_destroy_id(&id_priv->id);
2681 return 0;
2682 }
8aa08602 2683
de910bd9 2684 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2685 return 0;
2686}
2687
2688static void cma_set_mgid(struct rdma_id_private *id_priv,
2689 struct sockaddr *addr, union ib_gid *mgid)
2690{
2691 unsigned char mc_map[MAX_ADDR_LEN];
2692 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2693 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2694 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2695
2696 if (cma_any_addr(addr)) {
2697 memset(mgid, 0, sizeof *mgid);
2698 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 2699 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 2700 0xFF10A01B)) {
2701 /* IPv6 address is an SA assigned MGID. */
2702 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
e2e62697
JG		 2703 } else if ((addr->sa_family == AF_INET6)) {
2704 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2705 if (id_priv->id.ps == RDMA_PS_UDP)
2706 mc_map[7] = 0x01; /* Use RDMA CM signature */
2707 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 2708 } else {
a9e527e3 2709 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2710 if (id_priv->id.ps == RDMA_PS_UDP)
2711 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2712 *mgid = *(union ib_gid *) (mc_map + 4);
2713 }
2714}
2715
2716static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2717 struct cma_multicast *mc)
2718{
2719 struct ib_sa_mcmember_rec rec;
2720 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2721 ib_sa_comp_mask comp_mask;
2722 int ret;
2723
2724 ib_addr_get_mgid(dev_addr, &rec.mgid);
2725 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2726 &rec.mgid, &rec);
2727 if (ret)
2728 return ret;
2729
3f446754 2730 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 2731 if (id_priv->id.ps == RDMA_PS_UDP)
2732 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
6f8372b6 2733 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 2734 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2735 rec.join_state = 1;
2736
2737 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2738 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2739 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2740 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2741 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2742
84adeee9
YE		 2743 if (id_priv->id.ps == RDMA_PS_IPOIB)
2744 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2745 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2746
c8f6a362
SH		 2747 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2748 id_priv->id.port_num, &rec,
2749 comp_mask, GFP_KERNEL,
2750 cma_ib_mc_handler, mc);
2751 if (IS_ERR(mc->multicast.ib))
2752 return PTR_ERR(mc->multicast.ib);
2753
2754 return 0;
2755}
2756
2757int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2758 void *context)
2759{
2760 struct rdma_id_private *id_priv;
2761 struct cma_multicast *mc;
2762 int ret;
2763
2764 id_priv = container_of(id, struct rdma_id_private, id);
2765 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2766 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2767 return -EINVAL;
2768
2769 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2770 if (!mc)
2771 return -ENOMEM;
2772
2773 memcpy(&mc->addr, addr, ip_addr_size(addr));
2774 mc->context = context;
2775 mc->id_priv = id_priv;
2776
2777 spin_lock(&id_priv->lock);
2778 list_add(&mc->list, &id_priv->mc_list);
2779 spin_unlock(&id_priv->lock);
2780
2781 switch (rdma_node_get_transport(id->device->node_type)) {
2782 case RDMA_TRANSPORT_IB:
2783 ret = cma_join_ib_multicast(id_priv, mc);
2784 break;
2785 default:
2786 ret = -ENOSYS;
2787 break;
2788 }
2789
2790 if (ret) {
2791 spin_lock_irq(&id_priv->lock);
2792 list_del(&mc->list);
2793 spin_unlock_irq(&id_priv->lock);
2794 kfree(mc);
2795 }
2796 return ret;
2797}
2798EXPORT_SYMBOL(rdma_join_multicast);
2799
2800void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2801{
2802 struct rdma_id_private *id_priv;
2803 struct cma_multicast *mc;
2804
2805 id_priv = container_of(id, struct rdma_id_private, id);
2806 spin_lock_irq(&id_priv->lock);
2807 list_for_each_entry(mc, &id_priv->mc_list, list) {
2808 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2809 list_del(&mc->list);
2810 spin_unlock_irq(&id_priv->lock);
2811
2812 if (id->qp)
2813 ib_detach_mcast(id->qp,
2814 &mc->multicast.ib->rec.mgid,
2815 mc->multicast.ib->rec.mlid);
2816 ib_sa_free_multicast(mc->multicast.ib);
2817 kfree(mc);
2818 return;
2819 }
2820 }
2821 spin_unlock_irq(&id_priv->lock);
2822}
2823EXPORT_SYMBOL(rdma_leave_multicast);
2824
dd5bdff8
OG		 2825static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
2826{
2827 struct rdma_dev_addr *dev_addr;
2828 struct cma_ndev_work *work;
2829
2830 dev_addr = &id_priv->id.route.addr.dev_addr;
2831
6266ed6e 2832 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 2833 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
2834 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
2835 ndev->name, &id_priv->id);
2836 work = kzalloc(sizeof *work, GFP_KERNEL);
2837 if (!work)
2838 return -ENOMEM;
2839
2840 INIT_WORK(&work->work, cma_ndev_work_handler);
2841 work->id = id_priv;
2842 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
2843 atomic_inc(&id_priv->refcount);
2844 queue_work(cma_wq, &work->work);
2845 }
2846
2847 return 0;
2848}
2849
2850static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
2851 void *ctx)
2852{
2853 struct net_device *ndev = (struct net_device *)ctx;
2854 struct cma_device *cma_dev;
2855 struct rdma_id_private *id_priv;
2856 int ret = NOTIFY_DONE;
2857
2858 if (dev_net(ndev) != &init_net)
2859 return NOTIFY_DONE;
2860
2861 if (event != NETDEV_BONDING_FAILOVER)
2862 return NOTIFY_DONE;
2863
2864 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
2865 return NOTIFY_DONE;
2866
2867 mutex_lock(&lock);
2868 list_for_each_entry(cma_dev, &dev_list, list)
2869 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
2870 ret = cma_netdev_change(ndev, id_priv);
2871 if (ret)
2872 goto out;
2873 }
2874
2875out:
2876 mutex_unlock(&lock);
2877 return ret;
2878}
2879
2880static struct notifier_block cma_nb = {
2881 .notifier_call = cma_netdev_callback
2882};
2883
e51060f0
SH		 2884static void cma_add_one(struct ib_device *device)
2885{
2886 struct cma_device *cma_dev;
2887 struct rdma_id_private *id_priv;
2888
2889 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2890 if (!cma_dev)
2891 return;
2892
2893 cma_dev->device = device;
e51060f0
SH		 2894
2895 init_completion(&cma_dev->comp);
2896 atomic_set(&cma_dev->refcount, 1);
2897 INIT_LIST_HEAD(&cma_dev->id_list);
2898 ib_set_client_data(device, &cma_client, cma_dev);
2899
2900 mutex_lock(&lock);
2901 list_add_tail(&cma_dev->list, &dev_list);
2902 list_for_each_entry(id_priv, &listen_any_list, list)
2903 cma_listen_on_dev(id_priv, cma_dev);
2904 mutex_unlock(&lock);
e51060f0
SH		 2905}
2906
2907static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2908{
a1b1b61f 2909 struct rdma_cm_event event;
e51060f0 2910 enum cma_state state;
de910bd9 2911 int ret = 0;
e51060f0
SH		 2912
2913 /* Record that we want to remove the device */
2914 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2915 if (state == CMA_DESTROYING)
2916 return 0;
2917
2918 cma_cancel_operation(id_priv, state);
de910bd9 2919 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 2920
2921 /* Check for destruction from another callback. */
2922 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
de910bd9 2923 goto out;
e51060f0 2924
a1b1b61f
SH		 2925 memset(&event, 0, sizeof event);
2926 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 2927 ret = id_priv->id.event_handler(&id_priv->id, &event);
2928out:
2929 mutex_unlock(&id_priv->handler_mutex);
2930 return ret;
e51060f0
SH		 2931}
2932
2933static void cma_process_remove(struct cma_device *cma_dev)
2934{
e51060f0
SH		 2935 struct rdma_id_private *id_priv;
2936 int ret;
2937
e51060f0
SH		 2938 mutex_lock(&lock);
2939 while (!list_empty(&cma_dev->id_list)) {
2940 id_priv = list_entry(cma_dev->id_list.next,
2941 struct rdma_id_private, list);
2942
d02d1f53 2943 list_del(&id_priv->listen_list);
94de178a 2944 list_del_init(&id_priv->list);
e51060f0
SH		 2945 atomic_inc(&id_priv->refcount);
2946 mutex_unlock(&lock);
2947
d02d1f53 2948 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 2949 cma_deref_id(id_priv);
2950 if (ret)
2951 rdma_destroy_id(&id_priv->id);
2952
2953 mutex_lock(&lock);
2954 }
2955 mutex_unlock(&lock);
2956
2957 cma_deref_dev(cma_dev);
2958 wait_for_completion(&cma_dev->comp);
2959}
2960
2961static void cma_remove_one(struct ib_device *device)
2962{
2963 struct cma_device *cma_dev;
2964
2965 cma_dev = ib_get_client_data(device, &cma_client);
2966 if (!cma_dev)
2967 return;
2968
2969 mutex_lock(&lock);
2970 list_del(&cma_dev->list);
2971 mutex_unlock(&lock);
2972
2973 cma_process_remove(cma_dev);
2974 kfree(cma_dev);
2975}
2976
716abb1f 2977static int __init cma_init(void)
e51060f0 2978{
a25de534 2979 int ret, low, high, remaining;
e51060f0 2980
aedec080 2981 get_random_bytes(&next_port, sizeof next_port);
227b60f5 2982 inet_get_local_port_range(&low, &high);
a25de534
AA		 2983 remaining = (high - low) + 1;
2984 next_port = ((unsigned int) next_port % remaining) + low;
227b60f5 2985
c7f743a6 2986 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 2987 if (!cma_wq)
2988 return -ENOMEM;
2989
c1a0b23b 2990 ib_sa_register_client(&sa_client);
7a118df3 2991 rdma_addr_register_client(&addr_client);
dd5bdff8 2992 register_netdevice_notifier(&cma_nb);
c1a0b23b 2993
e51060f0
SH		 2994 ret = ib_register_client(&cma_client);
2995 if (ret)
2996 goto err;
2997 return 0;
2998
2999err:
dd5bdff8 3000 unregister_netdevice_notifier(&cma_nb);
7a118df3 3001 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3002 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3003 destroy_workqueue(cma_wq);
3004 return ret;
3005}
3006
716abb1f 3007static void __exit cma_cleanup(void)
e51060f0
SH		 3008{
3009 ib_unregister_client(&cma_client);
dd5bdff8 3010 unregister_netdevice_notifier(&cma_nb);
7a118df3 3011 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3012 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3013 destroy_workqueue(cma_wq);
3014 idr_destroy(&sdp_ps);
3015 idr_destroy(&tcp_ps);
628e5f6d 3016 idr_destroy(&udp_ps);
c8f6a362 3017 idr_destroy(&ipoib_ps);
e51060f0
SH		 3018}
3019
3020module_init(cma_init);
3021module_exit(cma_cleanup);
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