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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / core / cma.c
CommitLineData
e51060f0
SH		 1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
a9474917
SH		 7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
e51060f0 12 *
a9474917
SH		 13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
e51060f0 16 *
a9474917
SH		 17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
e51060f0 20 *
a9474917
SH		 21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
e51060f0 25 *
a9474917
SH		 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
e51060f0
SH		 34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/idr.h>
07ebafba 42#include <linux/inetdevice.h>
e51060f0
SH		 43
44#include <net/tcp.h>
1f5175ad 45#include <net/ipv6.h>
e51060f0
SH		 46
47#include <rdma/rdma_cm.h>
48#include <rdma/rdma_cm_ib.h>
49#include <rdma/ib_cache.h>
50#include <rdma/ib_cm.h>
51#include <rdma/ib_sa.h>
07ebafba 52#include <rdma/iw_cm.h>
e51060f0
SH		 53
54MODULE_AUTHOR("Sean Hefty");
55MODULE_DESCRIPTION("Generic RDMA CM Agent");
56MODULE_LICENSE("Dual BSD/GPL");
57
58#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 59#define CMA_MAX_CM_RETRIES 15
dcb3f974 60#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
e51060f0
SH		 61
62static void cma_add_one(struct ib_device *device);
63static void cma_remove_one(struct ib_device *device);
64
65static struct ib_client cma_client = {
66 .name = "cma",
67 .add = cma_add_one,
68 .remove = cma_remove_one
69};
70
c1a0b23b 71static struct ib_sa_client sa_client;
7a118df3 72static struct rdma_addr_client addr_client;
e51060f0
SH		 73static LIST_HEAD(dev_list);
74static LIST_HEAD(listen_any_list);
75static DEFINE_MUTEX(lock);
76static struct workqueue_struct *cma_wq;
77static DEFINE_IDR(sdp_ps);
78static DEFINE_IDR(tcp_ps);
628e5f6d 79static DEFINE_IDR(udp_ps);
c8f6a362 80static DEFINE_IDR(ipoib_ps);
aedec080 81static int next_port;
e51060f0
SH		 82
83struct cma_device {
84 struct list_head list;
85 struct ib_device *device;
e51060f0
SH		 86 struct completion comp;
87 atomic_t refcount;
88 struct list_head id_list;
89};
90
91enum cma_state {
92 CMA_IDLE,
93 CMA_ADDR_QUERY,
94 CMA_ADDR_RESOLVED,
95 CMA_ROUTE_QUERY,
96 CMA_ROUTE_RESOLVED,
97 CMA_CONNECT,
98 CMA_DISCONNECT,
99 CMA_ADDR_BOUND,
100 CMA_LISTEN,
101 CMA_DEVICE_REMOVAL,
102 CMA_DESTROYING
103};
104
105struct rdma_bind_list {
106 struct idr *ps;
107 struct hlist_head owners;
108 unsigned short port;
109};
110
111/*
112 * Device removal can occur at anytime, so we need extra handling to
113 * serialize notifying the user of device removal with other callbacks.
114 * We do this by disabling removal notification while a callback is in process,
115 * and reporting it after the callback completes.
116 */
117struct rdma_id_private {
118 struct rdma_cm_id id;
119
120 struct rdma_bind_list *bind_list;
121 struct hlist_node node;
d02d1f53
SH		 122 struct list_head list; /* listen_any_list or cma_device.list */
123 struct list_head listen_list; /* per device listens */
e51060f0 124 struct cma_device *cma_dev;
c8f6a362 125 struct list_head mc_list;
e51060f0 126
d02d1f53 127 int internal_id;
e51060f0
SH		 128 enum cma_state state;
129 spinlock_t lock;
c5483388
SH		 130 struct mutex qp_mutex;
131
e51060f0
SH		 132 struct completion comp;
133 atomic_t refcount;
de910bd9 134 struct mutex handler_mutex;
e51060f0
SH		 135
136 int backlog;
137 int timeout_ms;
138 struct ib_sa_query *query;
139 int query_id;
140 union {
141 struct ib_cm_id *ib;
07ebafba 142 struct iw_cm_id *iw;
e51060f0
SH		 143 } cm_id;
144
145 u32 seq_num;
c8f6a362 146 u32 qkey;
e51060f0 147 u32 qp_num;
e51060f0 148 u8 srq;
a81c994d 149 u8 tos;
e51060f0
SH		 150};
151
c8f6a362
SH		 152struct cma_multicast {
153 struct rdma_id_private *id_priv;
154 union {
155 struct ib_sa_multicast *ib;
156 } multicast;
157 struct list_head list;
158 void *context;
3f446754 159 struct sockaddr_storage addr;
c8f6a362
SH		 160};
161
e51060f0
SH		 162struct cma_work {
163 struct work_struct work;
164 struct rdma_id_private *id;
165 enum cma_state old_state;
166 enum cma_state new_state;
167 struct rdma_cm_event event;
168};
169
dd5bdff8
OG		 170struct cma_ndev_work {
171 struct work_struct work;
172 struct rdma_id_private *id;
173 struct rdma_cm_event event;
174};
175
e51060f0
SH		 176union cma_ip_addr {
177 struct in6_addr ip6;
178 struct {
1b90c137
AV		 179 __be32 pad[3];
180 __be32 addr;
e51060f0
SH		 181 } ip4;
182};
183
184struct cma_hdr {
185 u8 cma_version;
186 u8 ip_version; /* IP version: 7:4 */
1b90c137 187 __be16 port;
e51060f0
SH		 188 union cma_ip_addr src_addr;
189 union cma_ip_addr dst_addr;
190};
191
192struct sdp_hh {
193 u8 bsdh[16];
194 u8 sdp_version; /* Major version: 7:4 */
195 u8 ip_version; /* IP version: 7:4 */
196 u8 sdp_specific1[10];
1b90c137
AV		 197 __be16 port;
198 __be16 sdp_specific2;
e51060f0
SH		 199 union cma_ip_addr src_addr;
200 union cma_ip_addr dst_addr;
201};
202
203struct sdp_hah {
204 u8 bsdh[16];
205 u8 sdp_version;
206};
207
208#define CMA_VERSION 0x00
209#define SDP_MAJ_VERSION 0x2
210
211static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
212{
213 unsigned long flags;
214 int ret;
215
216 spin_lock_irqsave(&id_priv->lock, flags);
217 ret = (id_priv->state == comp);
218 spin_unlock_irqrestore(&id_priv->lock, flags);
219 return ret;
220}
221
222static int cma_comp_exch(struct rdma_id_private *id_priv,
223 enum cma_state comp, enum cma_state exch)
224{
225 unsigned long flags;
226 int ret;
227
228 spin_lock_irqsave(&id_priv->lock, flags);
229 if ((ret = (id_priv->state == comp)))
230 id_priv->state = exch;
231 spin_unlock_irqrestore(&id_priv->lock, flags);
232 return ret;
233}
234
235static enum cma_state cma_exch(struct rdma_id_private *id_priv,
236 enum cma_state exch)
237{
238 unsigned long flags;
239 enum cma_state old;
240
241 spin_lock_irqsave(&id_priv->lock, flags);
242 old = id_priv->state;
243 id_priv->state = exch;
244 spin_unlock_irqrestore(&id_priv->lock, flags);
245 return old;
246}
247
248static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
249{
250 return hdr->ip_version >> 4;
251}
252
253static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
254{
255 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
256}
257
258static inline u8 sdp_get_majv(u8 sdp_version)
259{
260 return sdp_version >> 4;
261}
262
263static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
264{
265 return hh->ip_version >> 4;
266}
267
268static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
269{
270 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
271}
272
c8f6a362
SH		 273static inline int cma_is_ud_ps(enum rdma_port_space ps)
274{
275 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
276}
277
e51060f0
SH		 278static void cma_attach_to_dev(struct rdma_id_private *id_priv,
279 struct cma_device *cma_dev)
280{
281 atomic_inc(&cma_dev->refcount);
282 id_priv->cma_dev = cma_dev;
283 id_priv->id.device = cma_dev->device;
284 list_add_tail(&id_priv->list, &cma_dev->id_list);
285}
286
287static inline void cma_deref_dev(struct cma_device *cma_dev)
288{
289 if (atomic_dec_and_test(&cma_dev->refcount))
290 complete(&cma_dev->comp);
291}
292
293static void cma_detach_from_dev(struct rdma_id_private *id_priv)
294{
295 list_del(&id_priv->list);
296 cma_deref_dev(id_priv->cma_dev);
297 id_priv->cma_dev = NULL;
298}
299
c8f6a362
SH		 300static int cma_set_qkey(struct ib_device *device, u8 port_num,
301 enum rdma_port_space ps,
302 struct rdma_dev_addr *dev_addr, u32 *qkey)
303{
304 struct ib_sa_mcmember_rec rec;
305 int ret = 0;
306
307 switch (ps) {
308 case RDMA_PS_UDP:
309 *qkey = RDMA_UDP_QKEY;
310 break;
311 case RDMA_PS_IPOIB:
312 ib_addr_get_mgid(dev_addr, &rec.mgid);
313 ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec);
314 *qkey = be32_to_cpu(rec.qkey);
315 break;
316 default:
317 break;
318 }
319 return ret;
320}
321
07ebafba 322static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 323{
c8f6a362 324 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 325 struct cma_device *cma_dev;
f0ee3404 326 union ib_gid gid;
e51060f0
SH		 327 int ret = -ENODEV;
328
c8f6a362 329 switch (rdma_node_get_transport(dev_addr->dev_type)) {
07ebafba 330 case RDMA_TRANSPORT_IB:
c8f6a362 331 ib_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 332 break;
333 case RDMA_TRANSPORT_IWARP:
c8f6a362 334 iw_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 335 break;
336 default:
337 return -ENODEV;
338 }
61a73c70 339
e51060f0 340 list_for_each_entry(cma_dev, &dev_list, list) {
f0ee3404 341 ret = ib_find_cached_gid(cma_dev->device, &gid,
e51060f0
SH		 342 &id_priv->id.port_num, NULL);
343 if (!ret) {
c8f6a362
SH		 344 ret = cma_set_qkey(cma_dev->device,
345 id_priv->id.port_num,
346 id_priv->id.ps, dev_addr,
347 &id_priv->qkey);
348 if (!ret)
349 cma_attach_to_dev(id_priv, cma_dev);
e51060f0
SH		 350 break;
351 }
352 }
e51060f0
SH		 353 return ret;
354}
355
e51060f0
SH		 356static void cma_deref_id(struct rdma_id_private *id_priv)
357{
358 if (atomic_dec_and_test(&id_priv->refcount))
359 complete(&id_priv->comp);
360}
361
de910bd9 362static int cma_disable_callback(struct rdma_id_private *id_priv,
8aa08602
SH		 363 enum cma_state state)
364{
de910bd9
OG		 365 mutex_lock(&id_priv->handler_mutex);
366 if (id_priv->state != state) {
367 mutex_unlock(&id_priv->handler_mutex);
368 return -EINVAL;
369 }
370 return 0;
e51060f0
SH		 371}
372
6c719f5c
SH		 373static int cma_has_cm_dev(struct rdma_id_private *id_priv)
374{
375 return (id_priv->id.device && id_priv->cm_id.ib);
376}
377
e51060f0
SH		 378struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
379 void *context, enum rdma_port_space ps)
380{
381 struct rdma_id_private *id_priv;
382
383 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
384 if (!id_priv)
385 return ERR_PTR(-ENOMEM);
386
387 id_priv->state = CMA_IDLE;
388 id_priv->id.context = context;
389 id_priv->id.event_handler = event_handler;
390 id_priv->id.ps = ps;
391 spin_lock_init(&id_priv->lock);
c5483388 392 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 393 init_completion(&id_priv->comp);
394 atomic_set(&id_priv->refcount, 1);
de910bd9 395 mutex_init(&id_priv->handler_mutex);
e51060f0 396 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 397 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 398 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
399
400 return &id_priv->id;
401}
402EXPORT_SYMBOL(rdma_create_id);
403
c8f6a362 404static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 405{
406 struct ib_qp_attr qp_attr;
c8f6a362 407 int qp_attr_mask, ret;
e51060f0 408
c8f6a362
SH		 409 qp_attr.qp_state = IB_QPS_INIT;
410 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 411 if (ret)
412 return ret;
413
c8f6a362
SH		 414 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
415 if (ret)
416 return ret;
417
418 qp_attr.qp_state = IB_QPS_RTR;
419 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
420 if (ret)
421 return ret;
422
423 qp_attr.qp_state = IB_QPS_RTS;
424 qp_attr.sq_psn = 0;
425 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
426
427 return ret;
e51060f0
SH		 428}
429
c8f6a362 430static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 431{
432 struct ib_qp_attr qp_attr;
c8f6a362 433 int qp_attr_mask, ret;
07ebafba
TT		 434
435 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 436 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
437 if (ret)
438 return ret;
07ebafba 439
c8f6a362 440 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 441}
442
e51060f0
SH		 443int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
444 struct ib_qp_init_attr *qp_init_attr)
445{
446 struct rdma_id_private *id_priv;
447 struct ib_qp *qp;
448 int ret;
449
450 id_priv = container_of(id, struct rdma_id_private, id);
451 if (id->device != pd->device)
452 return -EINVAL;
453
454 qp = ib_create_qp(pd, qp_init_attr);
455 if (IS_ERR(qp))
456 return PTR_ERR(qp);
457
c8f6a362
SH		 458 if (cma_is_ud_ps(id_priv->id.ps))
459 ret = cma_init_ud_qp(id_priv, qp);
460 else
461 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 462 if (ret)
463 goto err;
464
465 id->qp = qp;
466 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 467 id_priv->srq = (qp->srq != NULL);
468 return 0;
469err:
470 ib_destroy_qp(qp);
471 return ret;
472}
473EXPORT_SYMBOL(rdma_create_qp);
474
475void rdma_destroy_qp(struct rdma_cm_id *id)
476{
c5483388
SH		 477 struct rdma_id_private *id_priv;
478
479 id_priv = container_of(id, struct rdma_id_private, id);
480 mutex_lock(&id_priv->qp_mutex);
481 ib_destroy_qp(id_priv->id.qp);
482 id_priv->id.qp = NULL;
483 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 484}
485EXPORT_SYMBOL(rdma_destroy_qp);
486
5851bb89
SH		 487static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
488 struct rdma_conn_param *conn_param)
e51060f0
SH		 489{
490 struct ib_qp_attr qp_attr;
491 int qp_attr_mask, ret;
492
c5483388
SH		 493 mutex_lock(&id_priv->qp_mutex);
494 if (!id_priv->id.qp) {
495 ret = 0;
496 goto out;
497 }
e51060f0
SH		 498
499 /* Need to update QP attributes from default values. */
500 qp_attr.qp_state = IB_QPS_INIT;
c5483388 501 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 502 if (ret)
c5483388 503 goto out;
e51060f0 504
c5483388 505 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 506 if (ret)
c5483388 507 goto out;
e51060f0
SH		 508
509 qp_attr.qp_state = IB_QPS_RTR;
c5483388 510 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 511 if (ret)
c5483388 512 goto out;
e51060f0 513
5851bb89
SH		 514 if (conn_param)
515 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 516 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
517out:
518 mutex_unlock(&id_priv->qp_mutex);
519 return ret;
e51060f0
SH		 520}
521
5851bb89
SH		 522static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
523 struct rdma_conn_param *conn_param)
e51060f0
SH		 524{
525 struct ib_qp_attr qp_attr;
526 int qp_attr_mask, ret;
527
c5483388
SH		 528 mutex_lock(&id_priv->qp_mutex);
529 if (!id_priv->id.qp) {
530 ret = 0;
531 goto out;
532 }
e51060f0
SH		 533
534 qp_attr.qp_state = IB_QPS_RTS;
c5483388 535 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 536 if (ret)
c5483388 537 goto out;
e51060f0 538
5851bb89
SH		 539 if (conn_param)
540 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 541 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
542out:
543 mutex_unlock(&id_priv->qp_mutex);
544 return ret;
e51060f0
SH		 545}
546
c5483388 547static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 548{
549 struct ib_qp_attr qp_attr;
c5483388 550 int ret;
e51060f0 551
c5483388
SH		 552 mutex_lock(&id_priv->qp_mutex);
553 if (!id_priv->id.qp) {
554 ret = 0;
555 goto out;
556 }
e51060f0
SH		 557
558 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 559 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
560out:
561 mutex_unlock(&id_priv->qp_mutex);
562 return ret;
e51060f0
SH		 563}
564
c8f6a362
SH		 565static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
566 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
567{
568 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
569 int ret;
570
571 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
572 ib_addr_get_pkey(dev_addr),
573 &qp_attr->pkey_index);
574 if (ret)
575 return ret;
576
577 qp_attr->port_num = id_priv->id.port_num;
578 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
579
580 if (cma_is_ud_ps(id_priv->id.ps)) {
581 qp_attr->qkey = id_priv->qkey;
582 *qp_attr_mask |= IB_QP_QKEY;
583 } else {
584 qp_attr->qp_access_flags = 0;
585 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
586 }
587 return 0;
588}
589
e51060f0
SH		 590int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
591 int *qp_attr_mask)
592{
593 struct rdma_id_private *id_priv;
c8f6a362 594 int ret = 0;
e51060f0
SH		 595
596 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 597 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
598 case RDMA_TRANSPORT_IB:
c8f6a362
SH		 599 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
600 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
601 else
602 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
603 qp_attr_mask);
e51060f0
SH		 604 if (qp_attr->qp_state == IB_QPS_RTR)
605 qp_attr->rq_psn = id_priv->seq_num;
606 break;
07ebafba 607 case RDMA_TRANSPORT_IWARP:
c8f6a362 608 if (!id_priv->cm_id.iw) {
8f076531 609 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 610 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
611 } else
612 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
613 qp_attr_mask);
07ebafba 614 break;
e51060f0
SH		 615 default:
616 ret = -ENOSYS;
617 break;
618 }
619
620 return ret;
621}
622EXPORT_SYMBOL(rdma_init_qp_attr);
623
624static inline int cma_zero_addr(struct sockaddr *addr)
625{
626 struct in6_addr *ip6;
627
628 if (addr->sa_family == AF_INET)
6360a02a
JP		 629 return ipv4_is_zeronet(
630 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
e51060f0
SH		 631 else {
632 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
633 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 634 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 635 }
636}
637
638static inline int cma_loopback_addr(struct sockaddr *addr)
639{
1f5175ad
AS		 640 if (addr->sa_family == AF_INET)
641 return ipv4_is_loopback(
642 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
643 else
644 return ipv6_addr_loopback(
645 &((struct sockaddr_in6 *) addr)->sin6_addr);
e51060f0
SH		 646}
647
648static inline int cma_any_addr(struct sockaddr *addr)
649{
650 return cma_zero_addr(addr) || cma_loopback_addr(addr);
651}
652
628e5f6d
SH		 653static inline __be16 cma_port(struct sockaddr *addr)
654{
655 if (addr->sa_family == AF_INET)
656 return ((struct sockaddr_in *) addr)->sin_port;
657 else
658 return ((struct sockaddr_in6 *) addr)->sin6_port;
659}
660
e51060f0
SH		 661static inline int cma_any_port(struct sockaddr *addr)
662{
628e5f6d 663 return !cma_port(addr);
e51060f0
SH		 664}
665
666static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
1b90c137 667 u8 *ip_ver, __be16 *port,
e51060f0
SH		 668 union cma_ip_addr **src, union cma_ip_addr **dst)
669{
670 switch (ps) {
671 case RDMA_PS_SDP:
672 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
673 SDP_MAJ_VERSION)
674 return -EINVAL;
675
676 *ip_ver = sdp_get_ip_ver(hdr);
677 *port = ((struct sdp_hh *) hdr)->port;
678 *src = &((struct sdp_hh *) hdr)->src_addr;
679 *dst = &((struct sdp_hh *) hdr)->dst_addr;
680 break;
681 default:
682 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
683 return -EINVAL;
684
685 *ip_ver = cma_get_ip_ver(hdr);
686 *port = ((struct cma_hdr *) hdr)->port;
687 *src = &((struct cma_hdr *) hdr)->src_addr;
688 *dst = &((struct cma_hdr *) hdr)->dst_addr;
689 break;
690 }
691
692 if (*ip_ver != 4 && *ip_ver != 6)
693 return -EINVAL;
694 return 0;
695}
696
697static void cma_save_net_info(struct rdma_addr *addr,
698 struct rdma_addr *listen_addr,
1b90c137 699 u8 ip_ver, __be16 port,
e51060f0
SH		 700 union cma_ip_addr *src, union cma_ip_addr *dst)
701{
702 struct sockaddr_in *listen4, *ip4;
703 struct sockaddr_in6 *listen6, *ip6;
704
705 switch (ip_ver) {
706 case 4:
707 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
708 ip4 = (struct sockaddr_in *) &addr->src_addr;
709 ip4->sin_family = listen4->sin_family;
710 ip4->sin_addr.s_addr = dst->ip4.addr;
711 ip4->sin_port = listen4->sin_port;
712
713 ip4 = (struct sockaddr_in *) &addr->dst_addr;
714 ip4->sin_family = listen4->sin_family;
715 ip4->sin_addr.s_addr = src->ip4.addr;
716 ip4->sin_port = port;
717 break;
718 case 6:
719 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
720 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
721 ip6->sin6_family = listen6->sin6_family;
722 ip6->sin6_addr = dst->ip6;
723 ip6->sin6_port = listen6->sin6_port;
724
725 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
726 ip6->sin6_family = listen6->sin6_family;
727 ip6->sin6_addr = src->ip6;
728 ip6->sin6_port = port;
729 break;
730 default:
731 break;
732 }
733}
734
735static inline int cma_user_data_offset(enum rdma_port_space ps)
736{
737 switch (ps) {
738 case RDMA_PS_SDP:
739 return 0;
740 default:
741 return sizeof(struct cma_hdr);
742 }
743}
744
e51060f0
SH		 745static void cma_cancel_route(struct rdma_id_private *id_priv)
746{
07ebafba
TT		 747 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
748 case RDMA_TRANSPORT_IB:
e51060f0
SH		 749 if (id_priv->query)
750 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
751 break;
752 default:
753 break;
754 }
755}
756
e51060f0
SH		 757static void cma_cancel_listens(struct rdma_id_private *id_priv)
758{
759 struct rdma_id_private *dev_id_priv;
760
d02d1f53
SH		 761 /*
762 * Remove from listen_any_list to prevent added devices from spawning
763 * additional listen requests.
764 */
e51060f0
SH		 765 mutex_lock(&lock);
766 list_del(&id_priv->list);
767
768 while (!list_empty(&id_priv->listen_list)) {
769 dev_id_priv = list_entry(id_priv->listen_list.next,
770 struct rdma_id_private, listen_list);
d02d1f53
SH		 771 /* sync with device removal to avoid duplicate destruction */
772 list_del_init(&dev_id_priv->list);
773 list_del(&dev_id_priv->listen_list);
774 mutex_unlock(&lock);
775
776 rdma_destroy_id(&dev_id_priv->id);
777 mutex_lock(&lock);
e51060f0
SH		 778 }
779 mutex_unlock(&lock);
780}
781
782static void cma_cancel_operation(struct rdma_id_private *id_priv,
783 enum cma_state state)
784{
785 switch (state) {
786 case CMA_ADDR_QUERY:
787 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
788 break;
789 case CMA_ROUTE_QUERY:
790 cma_cancel_route(id_priv);
791 break;
792 case CMA_LISTEN:
3f446754
RD		 793 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
794 && !id_priv->cma_dev)
e51060f0
SH		 795 cma_cancel_listens(id_priv);
796 break;
797 default:
798 break;
799 }
800}
801
802static void cma_release_port(struct rdma_id_private *id_priv)
803{
804 struct rdma_bind_list *bind_list = id_priv->bind_list;
805
806 if (!bind_list)
807 return;
808
809 mutex_lock(&lock);
810 hlist_del(&id_priv->node);
811 if (hlist_empty(&bind_list->owners)) {
812 idr_remove(bind_list->ps, bind_list->port);
813 kfree(bind_list);
814 }
815 mutex_unlock(&lock);
816}
817
c8f6a362
SH		 818static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
819{
820 struct cma_multicast *mc;
821
822 while (!list_empty(&id_priv->mc_list)) {
823 mc = container_of(id_priv->mc_list.next,
824 struct cma_multicast, list);
825 list_del(&mc->list);
826 ib_sa_free_multicast(mc->multicast.ib);
827 kfree(mc);
828 }
829}
830
e51060f0
SH		 831void rdma_destroy_id(struct rdma_cm_id *id)
832{
833 struct rdma_id_private *id_priv;
834 enum cma_state state;
835
836 id_priv = container_of(id, struct rdma_id_private, id);
837 state = cma_exch(id_priv, CMA_DESTROYING);
838 cma_cancel_operation(id_priv, state);
839
61a73c70 840 mutex_lock(&lock);
e51060f0 841 if (id_priv->cma_dev) {
61a73c70 842 mutex_unlock(&lock);
07ebafba
TT		 843 switch (rdma_node_get_transport(id->device->node_type)) {
844 case RDMA_TRANSPORT_IB:
3cd96564 845 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 846 ib_destroy_cm_id(id_priv->cm_id.ib);
847 break;
07ebafba
TT		 848 case RDMA_TRANSPORT_IWARP:
849 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
850 iw_destroy_cm_id(id_priv->cm_id.iw);
851 break;
e51060f0
SH		 852 default:
853 break;
854 }
c8f6a362 855 cma_leave_mc_groups(id_priv);
3cd96564 856 mutex_lock(&lock);
e51060f0 857 cma_detach_from_dev(id_priv);
e51060f0 858 }
61a73c70 859 mutex_unlock(&lock);
e51060f0
SH		 860
861 cma_release_port(id_priv);
862 cma_deref_id(id_priv);
863 wait_for_completion(&id_priv->comp);
864
d02d1f53
SH		 865 if (id_priv->internal_id)
866 cma_deref_id(id_priv->id.context);
867
e51060f0
SH		 868 kfree(id_priv->id.route.path_rec);
869 kfree(id_priv);
870}
871EXPORT_SYMBOL(rdma_destroy_id);
872
873static int cma_rep_recv(struct rdma_id_private *id_priv)
874{
875 int ret;
876
5851bb89 877 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 878 if (ret)
879 goto reject;
880
5851bb89 881 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 882 if (ret)
883 goto reject;
884
885 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
886 if (ret)
887 goto reject;
888
889 return 0;
890reject:
c5483388 891 cma_modify_qp_err(id_priv);
e51060f0
SH		 892 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
893 NULL, 0, NULL, 0);
894 return ret;
895}
896
897static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
898{
899 if (id_priv->id.ps == RDMA_PS_SDP &&
900 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
901 SDP_MAJ_VERSION)
902 return -EINVAL;
903
904 return 0;
905}
906
a1b1b61f
SH		 907static void cma_set_rep_event_data(struct rdma_cm_event *event,
908 struct ib_cm_rep_event_param *rep_data,
909 void *private_data)
910{
911 event->param.conn.private_data = private_data;
912 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
913 event->param.conn.responder_resources = rep_data->responder_resources;
914 event->param.conn.initiator_depth = rep_data->initiator_depth;
915 event->param.conn.flow_control = rep_data->flow_control;
916 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
917 event->param.conn.srq = rep_data->srq;
918 event->param.conn.qp_num = rep_data->remote_qpn;
919}
920
e51060f0
SH		 921static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
922{
923 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 924 struct rdma_cm_event event;
925 int ret = 0;
e51060f0 926
38ca83a5
AV		 927 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
928 cma_disable_callback(id_priv, CMA_CONNECT)) ||
929 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
930 cma_disable_callback(id_priv, CMA_DISCONNECT)))
8aa08602 931 return 0;
e51060f0 932
a1b1b61f 933 memset(&event, 0, sizeof event);
e51060f0
SH		 934 switch (ib_event->event) {
935 case IB_CM_REQ_ERROR:
936 case IB_CM_REP_ERROR:
a1b1b61f
SH		 937 event.event = RDMA_CM_EVENT_UNREACHABLE;
938 event.status = -ETIMEDOUT;
e51060f0
SH		 939 break;
940 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 941 event.status = cma_verify_rep(id_priv, ib_event->private_data);
942 if (event.status)
943 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 944 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 945 event.status = cma_rep_recv(id_priv);
946 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
947 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 948 } else
a1b1b61f
SH		 949 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
950 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
951 ib_event->private_data);
e51060f0
SH		 952 break;
953 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 954 case IB_CM_USER_ESTABLISHED:
955 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 956 break;
957 case IB_CM_DREQ_ERROR:
a1b1b61f 958 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 959 case IB_CM_DREQ_RECEIVED:
960 case IB_CM_DREP_RECEIVED:
961 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
962 goto out;
a1b1b61f 963 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 964 break;
965 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 966 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
967 break;
e51060f0
SH		 968 case IB_CM_MRA_RECEIVED:
969 /* ignore event */
970 goto out;
971 case IB_CM_REJ_RECEIVED:
c5483388 972 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 973 event.status = ib_event->param.rej_rcvd.reason;
974 event.event = RDMA_CM_EVENT_REJECTED;
975 event.param.conn.private_data = ib_event->private_data;
976 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 977 break;
978 default:
468f2239 979 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 980 ib_event->event);
981 goto out;
982 }
983
a1b1b61f 984 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 985 if (ret) {
986 /* Destroy the CM ID by returning a non-zero value. */
987 id_priv->cm_id.ib = NULL;
988 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 989 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 990 rdma_destroy_id(&id_priv->id);
991 return ret;
992 }
993out:
de910bd9 994 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 995 return ret;
996}
997
628e5f6d
SH		 998static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
999 struct ib_cm_event *ib_event)
e51060f0
SH		 1000{
1001 struct rdma_id_private *id_priv;
1002 struct rdma_cm_id *id;
1003 struct rdma_route *rt;
1004 union cma_ip_addr *src, *dst;
1b90c137 1005 __be16 port;
e51060f0 1006 u8 ip_ver;
64c5e613 1007 int ret;
e51060f0 1008
3f168d2b
KK		 1009 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1010 &ip_ver, &port, &src, &dst))
1011 goto err;
1012
e51060f0
SH		 1013 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1014 listen_id->ps);
1015 if (IS_ERR(id))
3f168d2b
KK		 1016 goto err;
1017
1018 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1019 ip_ver, port, src, dst);
e51060f0
SH		 1020
1021 rt = &id->route;
1022 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1023 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1024 GFP_KERNEL);
e51060f0 1025 if (!rt->path_rec)
3f168d2b 1026 goto destroy_id;
e51060f0 1027
e51060f0
SH		 1028 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1029 if (rt->num_paths == 2)
1030 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1031
e51060f0 1032 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
3f446754 1033 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
64c5e613
OG		 1034 &id->route.addr.dev_addr);
1035 if (ret)
1036 goto destroy_id;
e51060f0
SH		 1037
1038 id_priv = container_of(id, struct rdma_id_private, id);
1039 id_priv->state = CMA_CONNECT;
1040 return id_priv;
3f168d2b
KK		 1041
1042destroy_id:
e51060f0 1043 rdma_destroy_id(id);
3f168d2b 1044err:
e51060f0
SH		 1045 return NULL;
1046}
1047
628e5f6d
SH		 1048static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1049 struct ib_cm_event *ib_event)
1050{
1051 struct rdma_id_private *id_priv;
1052 struct rdma_cm_id *id;
1053 union cma_ip_addr *src, *dst;
1b90c137 1054 __be16 port;
628e5f6d
SH		 1055 u8 ip_ver;
1056 int ret;
1057
1058 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1059 listen_id->ps);
1060 if (IS_ERR(id))
1061 return NULL;
1062
1063
1064 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1065 &ip_ver, &port, &src, &dst))
1066 goto err;
1067
1068 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1069 ip_ver, port, src, dst);
1070
3f446754 1071 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
628e5f6d
SH		 1072 &id->route.addr.dev_addr);
1073 if (ret)
1074 goto err;
1075
1076 id_priv = container_of(id, struct rdma_id_private, id);
1077 id_priv->state = CMA_CONNECT;
1078 return id_priv;
1079err:
1080 rdma_destroy_id(id);
1081 return NULL;
1082}
1083
a1b1b61f
SH		 1084static void cma_set_req_event_data(struct rdma_cm_event *event,
1085 struct ib_cm_req_event_param *req_data,
1086 void *private_data, int offset)
1087{
1088 event->param.conn.private_data = private_data + offset;
1089 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1090 event->param.conn.responder_resources = req_data->responder_resources;
1091 event->param.conn.initiator_depth = req_data->initiator_depth;
1092 event->param.conn.flow_control = req_data->flow_control;
1093 event->param.conn.retry_count = req_data->retry_count;
1094 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1095 event->param.conn.srq = req_data->srq;
1096 event->param.conn.qp_num = req_data->remote_qpn;
1097}
1098
e51060f0
SH		 1099static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1100{
1101 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1102 struct rdma_cm_event event;
e51060f0
SH		 1103 int offset, ret;
1104
1105 listen_id = cm_id->context;
de910bd9 1106 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1107 return -ECONNABORTED;
e51060f0 1108
628e5f6d
SH		 1109 memset(&event, 0, sizeof event);
1110 offset = cma_user_data_offset(listen_id->id.ps);
1111 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
c8f6a362 1112 if (cma_is_ud_ps(listen_id->id.ps)) {
628e5f6d
SH		 1113 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1114 event.param.ud.private_data = ib_event->private_data + offset;
1115 event.param.ud.private_data_len =
1116 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1117 } else {
1118 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1119 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1120 ib_event->private_data, offset);
1121 }
e51060f0
SH		 1122 if (!conn_id) {
1123 ret = -ENOMEM;
1124 goto out;
1125 }
1126
de910bd9 1127 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
61a73c70 1128 mutex_lock(&lock);
07ebafba 1129 ret = cma_acquire_dev(conn_id);
61a73c70 1130 mutex_unlock(&lock);
a1a733f6
KK		 1131 if (ret)
1132 goto release_conn_id;
e51060f0
SH		 1133
1134 conn_id->cm_id.ib = cm_id;
1135 cm_id->context = conn_id;
1136 cm_id->cm_handler = cma_ib_handler;
1137
a1b1b61f 1138 ret = conn_id->id.event_handler(&conn_id->id, &event);
45d9478d 1139 if (!ret) {
ead595ae
SH		 1140 /*
1141 * Acquire mutex to prevent user executing rdma_destroy_id()
1142 * while we're accessing the cm_id.
1143 */
1144 mutex_lock(&lock);
1145 if (cma_comp(conn_id, CMA_CONNECT) &&
1146 !cma_is_ud_ps(conn_id->id.ps))
1147 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1148 mutex_unlock(&lock);
de910bd9 1149 mutex_unlock(&conn_id->handler_mutex);
a1a733f6 1150 goto out;
45d9478d 1151 }
a1a733f6
KK		 1152
1153 /* Destroy the CM ID by returning a non-zero value. */
1154 conn_id->cm_id.ib = NULL;
1155
1156release_conn_id:
1157 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1158 mutex_unlock(&conn_id->handler_mutex);
a1a733f6
KK		 1159 rdma_destroy_id(&conn_id->id);
1160
e51060f0 1161out:
de910bd9 1162 mutex_unlock(&listen_id->handler_mutex);
e51060f0
SH		 1163 return ret;
1164}
1165
1166static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1167{
628e5f6d 1168 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1169}
1170
1171static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1172 struct ib_cm_compare_data *compare)
1173{
1174 struct cma_hdr *cma_data, *cma_mask;
1175 struct sdp_hh *sdp_data, *sdp_mask;
1b90c137 1176 __be32 ip4_addr;
e51060f0
SH		 1177 struct in6_addr ip6_addr;
1178
1179 memset(compare, 0, sizeof *compare);
1180 cma_data = (void *) compare->data;
1181 cma_mask = (void *) compare->mask;
1182 sdp_data = (void *) compare->data;
1183 sdp_mask = (void *) compare->mask;
1184
1185 switch (addr->sa_family) {
1186 case AF_INET:
1187 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1188 if (ps == RDMA_PS_SDP) {
1189 sdp_set_ip_ver(sdp_data, 4);
1190 sdp_set_ip_ver(sdp_mask, 0xF);
1191 sdp_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1192 sdp_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1193 } else {
1194 cma_set_ip_ver(cma_data, 4);
1195 cma_set_ip_ver(cma_mask, 0xF);
1196 cma_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1197 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1198 }
1199 break;
1200 case AF_INET6:
1201 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1202 if (ps == RDMA_PS_SDP) {
1203 sdp_set_ip_ver(sdp_data, 6);
1204 sdp_set_ip_ver(sdp_mask, 0xF);
1205 sdp_data->dst_addr.ip6 = ip6_addr;
1206 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1207 sizeof sdp_mask->dst_addr.ip6);
1208 } else {
1209 cma_set_ip_ver(cma_data, 6);
1210 cma_set_ip_ver(cma_mask, 0xF);
1211 cma_data->dst_addr.ip6 = ip6_addr;
1212 memset(&cma_mask->dst_addr.ip6, 0xFF,
1213 sizeof cma_mask->dst_addr.ip6);
1214 }
1215 break;
1216 default:
1217 break;
1218 }
1219}
1220
07ebafba
TT		 1221static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1222{
1223 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1224 struct rdma_cm_event event;
07ebafba
TT		 1225 struct sockaddr_in *sin;
1226 int ret = 0;
1227
de910bd9 1228 if (cma_disable_callback(id_priv, CMA_CONNECT))
be65f086 1229 return 0;
07ebafba 1230
be65f086 1231 memset(&event, 0, sizeof event);
07ebafba
TT		 1232 switch (iw_event->event) {
1233 case IW_CM_EVENT_CLOSE:
a1b1b61f 1234 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1235 break;
1236 case IW_CM_EVENT_CONNECT_REPLY:
1237 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1238 *sin = iw_event->local_addr;
1239 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1240 *sin = iw_event->remote_addr;
881a045f
SW		 1241 switch (iw_event->status) {
1242 case 0:
a1b1b61f 1243 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1244 break;
1245 case -ECONNRESET:
1246 case -ECONNREFUSED:
1247 event.event = RDMA_CM_EVENT_REJECTED;
1248 break;
1249 case -ETIMEDOUT:
1250 event.event = RDMA_CM_EVENT_UNREACHABLE;
1251 break;
1252 default:
1253 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1254 break;
1255 }
07ebafba
TT		 1256 break;
1257 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1258 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1259 break;
1260 default:
1261 BUG_ON(1);
1262 }
1263
a1b1b61f
SH		 1264 event.status = iw_event->status;
1265 event.param.conn.private_data = iw_event->private_data;
1266 event.param.conn.private_data_len = iw_event->private_data_len;
1267 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1268 if (ret) {
1269 /* Destroy the CM ID by returning a non-zero value. */
1270 id_priv->cm_id.iw = NULL;
1271 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1272 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1273 rdma_destroy_id(&id_priv->id);
1274 return ret;
1275 }
1276
de910bd9 1277 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1278 return ret;
1279}
1280
1281static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1282 struct iw_cm_event *iw_event)
1283{
1284 struct rdma_cm_id *new_cm_id;
1285 struct rdma_id_private *listen_id, *conn_id;
1286 struct sockaddr_in *sin;
1287 struct net_device *dev = NULL;
a1b1b61f 1288 struct rdma_cm_event event;
07ebafba 1289 int ret;
8d8293cf 1290 struct ib_device_attr attr;
07ebafba
TT		 1291
1292 listen_id = cm_id->context;
de910bd9 1293 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1294 return -ECONNABORTED;
07ebafba
TT		 1295
1296 /* Create a new RDMA id for the new IW CM ID */
1297 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1298 listen_id->id.context,
1299 RDMA_PS_TCP);
10f32065 1300 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1301 ret = -ENOMEM;
1302 goto out;
1303 }
1304 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1305 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba
TT		 1306 conn_id->state = CMA_CONNECT;
1307
1ab35276 1308 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
07ebafba
TT		 1309 if (!dev) {
1310 ret = -EADDRNOTAVAIL;
de910bd9 1311 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1312 rdma_destroy_id(new_cm_id);
1313 goto out;
1314 }
1315 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1316 if (ret) {
de910bd9 1317 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1318 rdma_destroy_id(new_cm_id);
1319 goto out;
1320 }
1321
61a73c70 1322 mutex_lock(&lock);
07ebafba 1323 ret = cma_acquire_dev(conn_id);
61a73c70 1324 mutex_unlock(&lock);
07ebafba 1325 if (ret) {
de910bd9 1326 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1327 rdma_destroy_id(new_cm_id);
1328 goto out;
1329 }
1330
1331 conn_id->cm_id.iw = cm_id;
1332 cm_id->context = conn_id;
1333 cm_id->cm_handler = cma_iw_handler;
1334
1335 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1336 *sin = iw_event->local_addr;
1337 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1338 *sin = iw_event->remote_addr;
1339
8d8293cf
SW		 1340 ret = ib_query_device(conn_id->id.device, &attr);
1341 if (ret) {
de910bd9 1342 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1343 rdma_destroy_id(new_cm_id);
1344 goto out;
1345 }
1346
a1b1b61f
SH		 1347 memset(&event, 0, sizeof event);
1348 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1349 event.param.conn.private_data = iw_event->private_data;
1350 event.param.conn.private_data_len = iw_event->private_data_len;
8d8293cf
SW		 1351 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1352 event.param.conn.responder_resources = attr.max_qp_rd_atom;
a1b1b61f 1353 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1354 if (ret) {
1355 /* User wants to destroy the CM ID */
1356 conn_id->cm_id.iw = NULL;
1357 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1358 mutex_unlock(&conn_id->handler_mutex);
07ebafba 1359 rdma_destroy_id(&conn_id->id);
de910bd9 1360 goto out;
07ebafba
TT		 1361 }
1362
de910bd9
OG		 1363 mutex_unlock(&conn_id->handler_mutex);
1364
07ebafba
TT		 1365out:
1366 if (dev)
1367 dev_put(dev);
de910bd9 1368 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1369 return ret;
1370}
1371
e51060f0
SH		 1372static int cma_ib_listen(struct rdma_id_private *id_priv)
1373{
1374 struct ib_cm_compare_data compare_data;
1375 struct sockaddr *addr;
1376 __be64 svc_id;
1377 int ret;
1378
1379 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1380 id_priv);
1381 if (IS_ERR(id_priv->cm_id.ib))
1382 return PTR_ERR(id_priv->cm_id.ib);
1383
3f446754 1384 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
e51060f0
SH		 1385 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1386 if (cma_any_addr(addr))
1387 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1388 else {
1389 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1390 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1391 }
1392
1393 if (ret) {
1394 ib_destroy_cm_id(id_priv->cm_id.ib);
1395 id_priv->cm_id.ib = NULL;
1396 }
1397
1398 return ret;
1399}
1400
07ebafba
TT		 1401static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1402{
1403 int ret;
1404 struct sockaddr_in *sin;
1405
1406 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1407 iw_conn_req_handler,
1408 id_priv);
1409 if (IS_ERR(id_priv->cm_id.iw))
1410 return PTR_ERR(id_priv->cm_id.iw);
1411
1412 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1413 id_priv->cm_id.iw->local_addr = *sin;
1414
1415 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1416
1417 if (ret) {
1418 iw_destroy_cm_id(id_priv->cm_id.iw);
1419 id_priv->cm_id.iw = NULL;
1420 }
1421
1422 return ret;
1423}
1424
e51060f0
SH		 1425static int cma_listen_handler(struct rdma_cm_id *id,
1426 struct rdma_cm_event *event)
1427{
1428 struct rdma_id_private *id_priv = id->context;
1429
1430 id->context = id_priv->id.context;
1431 id->event_handler = id_priv->id.event_handler;
1432 return id_priv->id.event_handler(id, event);
1433}
1434
1435static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1436 struct cma_device *cma_dev)
1437{
1438 struct rdma_id_private *dev_id_priv;
1439 struct rdma_cm_id *id;
1440 int ret;
1441
1442 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1443 if (IS_ERR(id))
1444 return;
1445
1446 dev_id_priv = container_of(id, struct rdma_id_private, id);
1447
1448 dev_id_priv->state = CMA_ADDR_BOUND;
1449 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
3f446754 1450 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
e51060f0
SH		 1451
1452 cma_attach_to_dev(dev_id_priv, cma_dev);
1453 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1454 atomic_inc(&id_priv->refcount);
1455 dev_id_priv->internal_id = 1;
e51060f0
SH		 1456
1457 ret = rdma_listen(id, id_priv->backlog);
1458 if (ret)
d02d1f53 1459 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1460 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1461}
1462
1463static void cma_listen_on_all(struct rdma_id_private *id_priv)
1464{
1465 struct cma_device *cma_dev;
1466
1467 mutex_lock(&lock);
1468 list_add_tail(&id_priv->list, &listen_any_list);
1469 list_for_each_entry(cma_dev, &dev_list, list)
1470 cma_listen_on_dev(id_priv, cma_dev);
1471 mutex_unlock(&lock);
1472}
1473
1474static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1475{
1f5175ad 1476 struct sockaddr_storage addr_in;
e51060f0
SH		 1477
1478 memset(&addr_in, 0, sizeof addr_in);
1f5175ad 1479 addr_in.ss_family = af;
e51060f0
SH		 1480 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1481}
1482
1483int rdma_listen(struct rdma_cm_id *id, int backlog)
1484{
1485 struct rdma_id_private *id_priv;
1486 int ret;
1487
1488 id_priv = container_of(id, struct rdma_id_private, id);
1489 if (id_priv->state == CMA_IDLE) {
1490 ret = cma_bind_any(id, AF_INET);
1491 if (ret)
1492 return ret;
1493 }
1494
1495 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1496 return -EINVAL;
1497
1498 id_priv->backlog = backlog;
1499 if (id->device) {
07ebafba
TT		 1500 switch (rdma_node_get_transport(id->device->node_type)) {
1501 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1502 ret = cma_ib_listen(id_priv);
1503 if (ret)
1504 goto err;
1505 break;
07ebafba
TT		 1506 case RDMA_TRANSPORT_IWARP:
1507 ret = cma_iw_listen(id_priv, backlog);
1508 if (ret)
1509 goto err;
1510 break;
e51060f0
SH		 1511 default:
1512 ret = -ENOSYS;
1513 goto err;
1514 }
1515 } else
1516 cma_listen_on_all(id_priv);
1517
1518 return 0;
1519err:
1520 id_priv->backlog = 0;
1521 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1522 return ret;
1523}
1524EXPORT_SYMBOL(rdma_listen);
1525
a81c994d
SH		 1526void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1527{
1528 struct rdma_id_private *id_priv;
1529
1530 id_priv = container_of(id, struct rdma_id_private, id);
1531 id_priv->tos = (u8) tos;
1532}
1533EXPORT_SYMBOL(rdma_set_service_type);
1534
e51060f0
SH		 1535static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1536 void *context)
1537{
1538 struct cma_work *work = context;
1539 struct rdma_route *route;
1540
1541 route = &work->id->id.route;
1542
1543 if (!status) {
1544 route->num_paths = 1;
1545 *route->path_rec = *path_rec;
1546 } else {
1547 work->old_state = CMA_ROUTE_QUERY;
1548 work->new_state = CMA_ADDR_RESOLVED;
1549 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1550 work->event.status = status;
e51060f0
SH		 1551 }
1552
1553 queue_work(cma_wq, &work->work);
1554}
1555
1556static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1557 struct cma_work *work)
1558{
a81c994d 1559 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1560 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1561 ib_sa_comp_mask comp_mask;
1562 struct sockaddr_in6 *sin6;
e51060f0
SH		 1563
1564 memset(&path_rec, 0, sizeof path_rec);
a81c994d
SH		 1565 ib_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1566 ib_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1567 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1568 path_rec.numb_path = 1;
962063e6 1569 path_rec.reversible = 1;
3f446754
RD		 1570 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1571 (struct sockaddr *) &addr->dst_addr);
a81c994d
SH		 1572
1573 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1574 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1575 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1576
3f446754 1577 if (addr->src_addr.ss_family == AF_INET) {
a81c994d
SH		 1578 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1579 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1580 } else {
1581 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1582 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1583 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1584 }
e51060f0 1585
c1a0b23b 1586 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1587 id_priv->id.port_num, &path_rec,
1588 comp_mask, timeout_ms,
1589 GFP_KERNEL, cma_query_handler,
1590 work, &id_priv->query);
e51060f0
SH		 1591
1592 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1593}
1594
c4028958 1595static void cma_work_handler(struct work_struct *_work)
e51060f0 1596{
c4028958 1597 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1598 struct rdma_id_private *id_priv = work->id;
1599 int destroy = 0;
1600
de910bd9 1601 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1602 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1603 goto out;
1604
1605 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1606 cma_exch(id_priv, CMA_DESTROYING);
1607 destroy = 1;
1608 }
1609out:
de910bd9 1610 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1611 cma_deref_id(id_priv);
1612 if (destroy)
1613 rdma_destroy_id(&id_priv->id);
1614 kfree(work);
1615}
1616
dd5bdff8
OG		 1617static void cma_ndev_work_handler(struct work_struct *_work)
1618{
1619 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1620 struct rdma_id_private *id_priv = work->id;
1621 int destroy = 0;
1622
1623 mutex_lock(&id_priv->handler_mutex);
1624 if (id_priv->state == CMA_DESTROYING ||
1625 id_priv->state == CMA_DEVICE_REMOVAL)
1626 goto out;
1627
1628 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1629 cma_exch(id_priv, CMA_DESTROYING);
1630 destroy = 1;
1631 }
1632
1633out:
1634 mutex_unlock(&id_priv->handler_mutex);
1635 cma_deref_id(id_priv);
1636 if (destroy)
1637 rdma_destroy_id(&id_priv->id);
1638 kfree(work);
1639}
1640
e51060f0
SH		 1641static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1642{
1643 struct rdma_route *route = &id_priv->id.route;
1644 struct cma_work *work;
1645 int ret;
1646
1647 work = kzalloc(sizeof *work, GFP_KERNEL);
1648 if (!work)
1649 return -ENOMEM;
1650
1651 work->id = id_priv;
c4028958 1652 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1653 work->old_state = CMA_ROUTE_QUERY;
1654 work->new_state = CMA_ROUTE_RESOLVED;
1655 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1656
1657 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1658 if (!route->path_rec) {
1659 ret = -ENOMEM;
1660 goto err1;
1661 }
1662
1663 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1664 if (ret)
1665 goto err2;
1666
1667 return 0;
1668err2:
1669 kfree(route->path_rec);
1670 route->path_rec = NULL;
1671err1:
1672 kfree(work);
1673 return ret;
1674}
1675
1676int rdma_set_ib_paths(struct rdma_cm_id *id,
1677 struct ib_sa_path_rec *path_rec, int num_paths)
1678{
1679 struct rdma_id_private *id_priv;
1680 int ret;
1681
1682 id_priv = container_of(id, struct rdma_id_private, id);
1683 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1684 return -EINVAL;
1685
1686 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1687 if (!id->route.path_rec) {
1688 ret = -ENOMEM;
1689 goto err;
1690 }
1691
1692 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1693 return 0;
1694err:
1695 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1696 return ret;
1697}
1698EXPORT_SYMBOL(rdma_set_ib_paths);
1699
07ebafba
TT		 1700static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1701{
1702 struct cma_work *work;
1703
1704 work = kzalloc(sizeof *work, GFP_KERNEL);
1705 if (!work)
1706 return -ENOMEM;
1707
1708 work->id = id_priv;
c4028958 1709 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1710 work->old_state = CMA_ROUTE_QUERY;
1711 work->new_state = CMA_ROUTE_RESOLVED;
1712 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1713 queue_work(cma_wq, &work->work);
1714 return 0;
1715}
1716
e51060f0
SH		 1717int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1718{
1719 struct rdma_id_private *id_priv;
1720 int ret;
1721
1722 id_priv = container_of(id, struct rdma_id_private, id);
1723 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1724 return -EINVAL;
1725
1726 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1727 switch (rdma_node_get_transport(id->device->node_type)) {
1728 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1729 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1730 break;
07ebafba
TT		 1731 case RDMA_TRANSPORT_IWARP:
1732 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1733 break;
e51060f0
SH		 1734 default:
1735 ret = -ENOSYS;
1736 break;
1737 }
1738 if (ret)
1739 goto err;
1740
1741 return 0;
1742err:
1743 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1744 cma_deref_id(id_priv);
1745 return ret;
1746}
1747EXPORT_SYMBOL(rdma_resolve_route);
1748
1749static int cma_bind_loopback(struct rdma_id_private *id_priv)
1750{
1751 struct cma_device *cma_dev;
1752 struct ib_port_attr port_attr;
f0ee3404 1753 union ib_gid gid;
e51060f0
SH		 1754 u16 pkey;
1755 int ret;
1756 u8 p;
1757
1758 mutex_lock(&lock);
e82153b5
KK		 1759 if (list_empty(&dev_list)) {
1760 ret = -ENODEV;
1761 goto out;
1762 }
e51060f0
SH		 1763 list_for_each_entry(cma_dev, &dev_list, list)
1764 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1765 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1766 port_attr.state == IB_PORT_ACTIVE)
1767 goto port_found;
1768
e82153b5
KK		 1769 p = 1;
1770 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1771
1772port_found:
f0ee3404 1773 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1774 if (ret)
1775 goto out;
1776
1777 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1778 if (ret)
1779 goto out;
1780
f0ee3404 1781 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1782 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1783 id_priv->id.port_num = p;
1784 cma_attach_to_dev(id_priv, cma_dev);
1785out:
1786 mutex_unlock(&lock);
1787 return ret;
1788}
1789
1790static void addr_handler(int status, struct sockaddr *src_addr,
1791 struct rdma_dev_addr *dev_addr, void *context)
1792{
1793 struct rdma_id_private *id_priv = context;
a1b1b61f 1794 struct rdma_cm_event event;
e51060f0 1795
a1b1b61f 1796 memset(&event, 0, sizeof event);
de910bd9 1797 mutex_lock(&id_priv->handler_mutex);
61a73c70
SH		 1798
1799 /*
1800 * Grab mutex to block rdma_destroy_id() from removing the device while
1801 * we're trying to acquire it.
1802 */
1803 mutex_lock(&lock);
1804 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1805 mutex_unlock(&lock);
1806 goto out;
1807 }
1808
1809 if (!status && !id_priv->cma_dev)
e51060f0 1810 status = cma_acquire_dev(id_priv);
61a73c70 1811 mutex_unlock(&lock);
e51060f0
SH		 1812
1813 if (status) {
61a73c70 1814 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1815 goto out;
a1b1b61f
SH		 1816 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1817 event.status = status;
e51060f0 1818 } else {
e51060f0
SH		 1819 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1820 ip_addr_size(src_addr));
a1b1b61f 1821 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1822 }
1823
a1b1b61f 1824 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1825 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1826 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1827 cma_deref_id(id_priv);
1828 rdma_destroy_id(&id_priv->id);
1829 return;
1830 }
1831out:
de910bd9 1832 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1833 cma_deref_id(id_priv);
1834}
1835
1836static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1837{
1838 struct cma_work *work;
1839 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1840 union ib_gid gid;
e51060f0
SH		 1841 int ret;
1842
1843 work = kzalloc(sizeof *work, GFP_KERNEL);
1844 if (!work)
1845 return -ENOMEM;
1846
1847 if (!id_priv->cma_dev) {
1848 ret = cma_bind_loopback(id_priv);
1849 if (ret)
1850 goto err;
1851 }
1852
f0ee3404
MT		 1853 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1854 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 1855
3f446754 1856 if (cma_zero_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)) {
e51060f0
SH		 1857 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1858 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1859 src_in->sin_family = dst_in->sin_family;
1860 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1861 }
1862
1863 work->id = id_priv;
c4028958 1864 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1865 work->old_state = CMA_ADDR_QUERY;
1866 work->new_state = CMA_ADDR_RESOLVED;
1867 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1868 queue_work(cma_wq, &work->work);
1869 return 0;
1870err:
1871 kfree(work);
1872 return ret;
1873}
1874
1875static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1876 struct sockaddr *dst_addr)
1877{
1878 if (src_addr && src_addr->sa_family)
1879 return rdma_bind_addr(id, src_addr);
1880 else
1881 return cma_bind_any(id, dst_addr->sa_family);
1882}
1883
1884int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1885 struct sockaddr *dst_addr, int timeout_ms)
1886{
1887 struct rdma_id_private *id_priv;
1888 int ret;
1889
1890 id_priv = container_of(id, struct rdma_id_private, id);
1891 if (id_priv->state == CMA_IDLE) {
1892 ret = cma_bind_addr(id, src_addr, dst_addr);
1893 if (ret)
1894 return ret;
1895 }
1896
1897 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1898 return -EINVAL;
1899
1900 atomic_inc(&id_priv->refcount);
1901 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1902 if (cma_any_addr(dst_addr))
1903 ret = cma_resolve_loopback(id_priv);
1904 else
3f446754 1905 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 1906 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1907 timeout_ms, addr_handler, id_priv);
1908 if (ret)
1909 goto err;
1910
1911 return 0;
1912err:
1913 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1914 cma_deref_id(id_priv);
1915 return ret;
1916}
1917EXPORT_SYMBOL(rdma_resolve_addr);
1918
1919static void cma_bind_port(struct rdma_bind_list *bind_list,
1920 struct rdma_id_private *id_priv)
1921{
1922 struct sockaddr_in *sin;
1923
1924 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1925 sin->sin_port = htons(bind_list->port);
1926 id_priv->bind_list = bind_list;
1927 hlist_add_head(&id_priv->node, &bind_list->owners);
1928}
1929
1930static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1931 unsigned short snum)
1932{
1933 struct rdma_bind_list *bind_list;
aedec080 1934 int port, ret;
e51060f0 1935
cb164b8c 1936 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 1937 if (!bind_list)
1938 return -ENOMEM;
1939
aedec080
SH		 1940 do {
1941 ret = idr_get_new_above(ps, bind_list, snum, &port);
1942 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1943
1944 if (ret)
1945 goto err1;
1946
1947 if (port != snum) {
1948 ret = -EADDRNOTAVAIL;
1949 goto err2;
1950 }
1951
1952 bind_list->ps = ps;
1953 bind_list->port = (unsigned short) port;
1954 cma_bind_port(bind_list, id_priv);
1955 return 0;
1956err2:
1957 idr_remove(ps, port);
1958err1:
1959 kfree(bind_list);
1960 return ret;
1961}
e51060f0 1962
aedec080
SH		 1963static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1964{
1965 struct rdma_bind_list *bind_list;
227b60f5 1966 int port, ret, low, high;
aedec080
SH		 1967
1968 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1969 if (!bind_list)
1970 return -ENOMEM;
1971
1972retry:
227b60f5 1973 /* FIXME: add proper port randomization per like inet_csk_get_port */
e51060f0 1974 do {
aedec080 1975 ret = idr_get_new_above(ps, bind_list, next_port, &port);
e51060f0
SH		 1976 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1977
1978 if (ret)
aedec080 1979 goto err1;
e51060f0 1980
227b60f5
SH		 1981 inet_get_local_port_range(&low, &high);
1982 if (port > high) {
1983 if (next_port != low) {
aedec080 1984 idr_remove(ps, port);
227b60f5 1985 next_port = low;
aedec080
SH		 1986 goto retry;
1987 }
e51060f0 1988 ret = -EADDRNOTAVAIL;
aedec080 1989 goto err2;
e51060f0
SH		 1990 }
1991
227b60f5
SH		 1992 if (port == high)
1993 next_port = low;
aedec080
SH		 1994 else
1995 next_port = port + 1;
1996
e51060f0
SH		 1997 bind_list->ps = ps;
1998 bind_list->port = (unsigned short) port;
1999 cma_bind_port(bind_list, id_priv);
2000 return 0;
aedec080
SH		 2001err2:
2002 idr_remove(ps, port);
2003err1:
e51060f0
SH		 2004 kfree(bind_list);
2005 return ret;
2006}
2007
2008static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2009{
2010 struct rdma_id_private *cur_id;
2011 struct sockaddr_in *sin, *cur_sin;
2012 struct rdma_bind_list *bind_list;
2013 struct hlist_node *node;
2014 unsigned short snum;
2015
2016 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2017 snum = ntohs(sin->sin_port);
2018 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2019 return -EACCES;
2020
2021 bind_list = idr_find(ps, snum);
2022 if (!bind_list)
2023 return cma_alloc_port(ps, id_priv, snum);
2024
2025 /*
2026 * We don't support binding to any address if anyone is bound to
2027 * a specific address on the same port.
2028 */
3f446754 2029 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr))
e51060f0
SH		 2030 return -EADDRNOTAVAIL;
2031
2032 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
3f446754 2033 if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr))
e51060f0 2034 return -EADDRNOTAVAIL;
3cd96564 2035
e51060f0
SH		 2036 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
2037 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2038 return -EADDRINUSE;
2039 }
2040
2041 cma_bind_port(bind_list, id_priv);
2042 return 0;
2043}
2044
2045static int cma_get_port(struct rdma_id_private *id_priv)
2046{
2047 struct idr *ps;
2048 int ret;
2049
2050 switch (id_priv->id.ps) {
2051 case RDMA_PS_SDP:
2052 ps = &sdp_ps;
2053 break;
2054 case RDMA_PS_TCP:
2055 ps = &tcp_ps;
2056 break;
628e5f6d
SH		 2057 case RDMA_PS_UDP:
2058 ps = &udp_ps;
2059 break;
c8f6a362
SH		 2060 case RDMA_PS_IPOIB:
2061 ps = &ipoib_ps;
2062 break;
e51060f0
SH		 2063 default:
2064 return -EPROTONOSUPPORT;
2065 }
2066
2067 mutex_lock(&lock);
3f446754 2068 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2069 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2070 else
2071 ret = cma_use_port(ps, id_priv);
2072 mutex_unlock(&lock);
2073
2074 return ret;
2075}
2076
2077int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2078{
2079 struct rdma_id_private *id_priv;
2080 int ret;
2081
1f5175ad 2082 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
e51060f0
SH		 2083 return -EAFNOSUPPORT;
2084
2085 id_priv = container_of(id, struct rdma_id_private, id);
2086 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2087 return -EINVAL;
2088
2089 if (!cma_any_addr(addr)) {
2090 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2091 if (ret)
255d0c14
KK		 2092 goto err1;
2093
2094 mutex_lock(&lock);
2095 ret = cma_acquire_dev(id_priv);
2096 mutex_unlock(&lock);
2097 if (ret)
2098 goto err1;
e51060f0
SH		 2099 }
2100
2101 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2102 ret = cma_get_port(id_priv);
2103 if (ret)
255d0c14 2104 goto err2;
e51060f0
SH		 2105
2106 return 0;
255d0c14
KK		 2107err2:
2108 if (!cma_any_addr(addr)) {
2109 mutex_lock(&lock);
2110 cma_detach_from_dev(id_priv);
2111 mutex_unlock(&lock);
2112 }
2113err1:
e51060f0
SH		 2114 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2115 return ret;
2116}
2117EXPORT_SYMBOL(rdma_bind_addr);
2118
2119static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2120 struct rdma_route *route)
2121{
e51060f0
SH		 2122 struct cma_hdr *cma_hdr;
2123 struct sdp_hh *sdp_hdr;
2124
1f5175ad
AS		 2125 if (route->addr.src_addr.ss_family == AF_INET) {
2126 struct sockaddr_in *src4, *dst4;
2127
2128 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2129 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2130
2131 switch (ps) {
2132 case RDMA_PS_SDP:
2133 sdp_hdr = hdr;
2134 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2135 return -EINVAL;
2136 sdp_set_ip_ver(sdp_hdr, 4);
2137 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2138 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2139 sdp_hdr->port = src4->sin_port;
2140 break;
2141 default:
2142 cma_hdr = hdr;
2143 cma_hdr->cma_version = CMA_VERSION;
2144 cma_set_ip_ver(cma_hdr, 4);
2145 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2146 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2147 cma_hdr->port = src4->sin_port;
2148 break;
2149 }
2150 } else {
2151 struct sockaddr_in6 *src6, *dst6;
2152
2153 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2154 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2155
2156 switch (ps) {
2157 case RDMA_PS_SDP:
2158 sdp_hdr = hdr;
2159 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2160 return -EINVAL;
2161 sdp_set_ip_ver(sdp_hdr, 6);
2162 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2163 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2164 sdp_hdr->port = src6->sin6_port;
2165 break;
2166 default:
2167 cma_hdr = hdr;
2168 cma_hdr->cma_version = CMA_VERSION;
2169 cma_set_ip_ver(cma_hdr, 6);
2170 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2171 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2172 cma_hdr->port = src6->sin6_port;
2173 break;
2174 }
e51060f0
SH		 2175 }
2176 return 0;
2177}
2178
628e5f6d
SH		 2179static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2180 struct ib_cm_event *ib_event)
2181{
2182 struct rdma_id_private *id_priv = cm_id->context;
2183 struct rdma_cm_event event;
2184 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2185 int ret = 0;
2186
de910bd9 2187 if (cma_disable_callback(id_priv, CMA_CONNECT))
8aa08602 2188 return 0;
628e5f6d 2189
8aa08602 2190 memset(&event, 0, sizeof event);
628e5f6d
SH		 2191 switch (ib_event->event) {
2192 case IB_CM_SIDR_REQ_ERROR:
2193 event.event = RDMA_CM_EVENT_UNREACHABLE;
2194 event.status = -ETIMEDOUT;
2195 break;
2196 case IB_CM_SIDR_REP_RECEIVED:
2197 event.param.ud.private_data = ib_event->private_data;
2198 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2199 if (rep->status != IB_SIDR_SUCCESS) {
2200 event.event = RDMA_CM_EVENT_UNREACHABLE;
2201 event.status = ib_event->param.sidr_rep_rcvd.status;
2202 break;
2203 }
c8f6a362 2204 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2205 event.event = RDMA_CM_EVENT_UNREACHABLE;
2206 event.status = -EINVAL;
2207 break;
2208 }
2209 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2210 id_priv->id.route.path_rec,
2211 &event.param.ud.ah_attr);
2212 event.param.ud.qp_num = rep->qpn;
2213 event.param.ud.qkey = rep->qkey;
2214 event.event = RDMA_CM_EVENT_ESTABLISHED;
2215 event.status = 0;
2216 break;
2217 default:
468f2239 2218 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2219 ib_event->event);
2220 goto out;
2221 }
2222
2223 ret = id_priv->id.event_handler(&id_priv->id, &event);
2224 if (ret) {
2225 /* Destroy the CM ID by returning a non-zero value. */
2226 id_priv->cm_id.ib = NULL;
2227 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2228 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2229 rdma_destroy_id(&id_priv->id);
2230 return ret;
2231 }
2232out:
de910bd9 2233 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2234 return ret;
2235}
2236
2237static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2238 struct rdma_conn_param *conn_param)
2239{
2240 struct ib_cm_sidr_req_param req;
2241 struct rdma_route *route;
2242 int ret;
2243
2244 req.private_data_len = sizeof(struct cma_hdr) +
2245 conn_param->private_data_len;
2246 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2247 if (!req.private_data)
2248 return -ENOMEM;
2249
2250 if (conn_param->private_data && conn_param->private_data_len)
2251 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2252 conn_param->private_data, conn_param->private_data_len);
2253
2254 route = &id_priv->id.route;
2255 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2256 if (ret)
2257 goto out;
2258
2259 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2260 cma_sidr_rep_handler, id_priv);
2261 if (IS_ERR(id_priv->cm_id.ib)) {
2262 ret = PTR_ERR(id_priv->cm_id.ib);
2263 goto out;
2264 }
2265
2266 req.path = route->path_rec;
2267 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2268 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2269 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2270 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2271
2272 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2273 if (ret) {
2274 ib_destroy_cm_id(id_priv->cm_id.ib);
2275 id_priv->cm_id.ib = NULL;
2276 }
2277out:
2278 kfree(req.private_data);
2279 return ret;
2280}
2281
e51060f0
SH		 2282static int cma_connect_ib(struct rdma_id_private *id_priv,
2283 struct rdma_conn_param *conn_param)
2284{
2285 struct ib_cm_req_param req;
2286 struct rdma_route *route;
2287 void *private_data;
2288 int offset, ret;
2289
2290 memset(&req, 0, sizeof req);
2291 offset = cma_user_data_offset(id_priv->id.ps);
2292 req.private_data_len = offset + conn_param->private_data_len;
2293 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2294 if (!private_data)
2295 return -ENOMEM;
2296
2297 if (conn_param->private_data && conn_param->private_data_len)
2298 memcpy(private_data + offset, conn_param->private_data,
2299 conn_param->private_data_len);
2300
2301 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2302 id_priv);
2303 if (IS_ERR(id_priv->cm_id.ib)) {
2304 ret = PTR_ERR(id_priv->cm_id.ib);
2305 goto out;
2306 }
2307
2308 route = &id_priv->id.route;
2309 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2310 if (ret)
2311 goto out;
2312 req.private_data = private_data;
2313
2314 req.primary_path = &route->path_rec[0];
2315 if (route->num_paths == 2)
2316 req.alternate_path = &route->path_rec[1];
2317
2318 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2319 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2320 req.qp_num = id_priv->qp_num;
9b2e9c0c 2321 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2322 req.starting_psn = id_priv->seq_num;
2323 req.responder_resources = conn_param->responder_resources;
2324 req.initiator_depth = conn_param->initiator_depth;
2325 req.flow_control = conn_param->flow_control;
2326 req.retry_count = conn_param->retry_count;
2327 req.rnr_retry_count = conn_param->rnr_retry_count;
2328 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2329 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2330 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2331 req.srq = id_priv->srq ? 1 : 0;
2332
2333 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2334out:
675a027c
KK		 2335 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2336 ib_destroy_cm_id(id_priv->cm_id.ib);
2337 id_priv->cm_id.ib = NULL;
2338 }
2339
e51060f0
SH		 2340 kfree(private_data);
2341 return ret;
2342}
2343
07ebafba
TT		 2344static int cma_connect_iw(struct rdma_id_private *id_priv,
2345 struct rdma_conn_param *conn_param)
2346{
2347 struct iw_cm_id *cm_id;
2348 struct sockaddr_in* sin;
2349 int ret;
2350 struct iw_cm_conn_param iw_param;
2351
2352 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2353 if (IS_ERR(cm_id)) {
2354 ret = PTR_ERR(cm_id);
2355 goto out;
2356 }
2357
2358 id_priv->cm_id.iw = cm_id;
2359
2360 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2361 cm_id->local_addr = *sin;
2362
2363 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2364 cm_id->remote_addr = *sin;
2365
5851bb89 2366 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2367 if (ret)
2368 goto out;
07ebafba
TT		 2369
2370 iw_param.ord = conn_param->initiator_depth;
2371 iw_param.ird = conn_param->responder_resources;
2372 iw_param.private_data = conn_param->private_data;
2373 iw_param.private_data_len = conn_param->private_data_len;
2374 if (id_priv->id.qp)
2375 iw_param.qpn = id_priv->qp_num;
2376 else
2377 iw_param.qpn = conn_param->qp_num;
2378 ret = iw_cm_connect(cm_id, &iw_param);
2379out:
675a027c
KK		 2380 if (ret && !IS_ERR(cm_id)) {
2381 iw_destroy_cm_id(cm_id);
2382 id_priv->cm_id.iw = NULL;
2383 }
07ebafba
TT		 2384 return ret;
2385}
2386
e51060f0
SH		 2387int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2388{
2389 struct rdma_id_private *id_priv;
2390 int ret;
2391
2392 id_priv = container_of(id, struct rdma_id_private, id);
2393 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2394 return -EINVAL;
2395
2396 if (!id->qp) {
2397 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2398 id_priv->srq = conn_param->srq;
2399 }
2400
07ebafba
TT		 2401 switch (rdma_node_get_transport(id->device->node_type)) {
2402 case RDMA_TRANSPORT_IB:
c8f6a362 2403 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2404 ret = cma_resolve_ib_udp(id_priv, conn_param);
2405 else
2406 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2407 break;
07ebafba
TT		 2408 case RDMA_TRANSPORT_IWARP:
2409 ret = cma_connect_iw(id_priv, conn_param);
2410 break;
e51060f0
SH		 2411 default:
2412 ret = -ENOSYS;
2413 break;
2414 }
2415 if (ret)
2416 goto err;
2417
2418 return 0;
2419err:
2420 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2421 return ret;
2422}
2423EXPORT_SYMBOL(rdma_connect);
2424
2425static int cma_accept_ib(struct rdma_id_private *id_priv,
2426 struct rdma_conn_param *conn_param)
2427{
2428 struct ib_cm_rep_param rep;
5851bb89 2429 int ret;
0fe313b0 2430
5851bb89
SH		 2431 ret = cma_modify_qp_rtr(id_priv, conn_param);
2432 if (ret)
2433 goto out;
0fe313b0 2434
5851bb89
SH		 2435 ret = cma_modify_qp_rts(id_priv, conn_param);
2436 if (ret)
2437 goto out;
e51060f0
SH		 2438
2439 memset(&rep, 0, sizeof rep);
2440 rep.qp_num = id_priv->qp_num;
2441 rep.starting_psn = id_priv->seq_num;
2442 rep.private_data = conn_param->private_data;
2443 rep.private_data_len = conn_param->private_data_len;
2444 rep.responder_resources = conn_param->responder_resources;
2445 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2446 rep.failover_accepted = 0;
2447 rep.flow_control = conn_param->flow_control;
2448 rep.rnr_retry_count = conn_param->rnr_retry_count;
2449 rep.srq = id_priv->srq ? 1 : 0;
2450
0fe313b0
SH		 2451 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2452out:
2453 return ret;
e51060f0
SH		 2454}
2455
07ebafba
TT		 2456static int cma_accept_iw(struct rdma_id_private *id_priv,
2457 struct rdma_conn_param *conn_param)
2458{
2459 struct iw_cm_conn_param iw_param;
2460 int ret;
2461
5851bb89 2462 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2463 if (ret)
2464 return ret;
2465
2466 iw_param.ord = conn_param->initiator_depth;
2467 iw_param.ird = conn_param->responder_resources;
2468 iw_param.private_data = conn_param->private_data;
2469 iw_param.private_data_len = conn_param->private_data_len;
2470 if (id_priv->id.qp) {
2471 iw_param.qpn = id_priv->qp_num;
2472 } else
2473 iw_param.qpn = conn_param->qp_num;
2474
2475 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2476}
2477
628e5f6d
SH		 2478static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2479 enum ib_cm_sidr_status status,
2480 const void *private_data, int private_data_len)
2481{
2482 struct ib_cm_sidr_rep_param rep;
2483
2484 memset(&rep, 0, sizeof rep);
2485 rep.status = status;
2486 if (status == IB_SIDR_SUCCESS) {
2487 rep.qp_num = id_priv->qp_num;
c8f6a362 2488 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2489 }
2490 rep.private_data = private_data;
2491 rep.private_data_len = private_data_len;
2492
2493 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2494}
2495
e51060f0
SH		 2496int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2497{
2498 struct rdma_id_private *id_priv;
2499 int ret;
2500
2501 id_priv = container_of(id, struct rdma_id_private, id);
2502 if (!cma_comp(id_priv, CMA_CONNECT))
2503 return -EINVAL;
2504
2505 if (!id->qp && conn_param) {
2506 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2507 id_priv->srq = conn_param->srq;
2508 }
2509
07ebafba
TT		 2510 switch (rdma_node_get_transport(id->device->node_type)) {
2511 case RDMA_TRANSPORT_IB:
c8f6a362 2512 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2513 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2514 conn_param->private_data,
2515 conn_param->private_data_len);
2516 else if (conn_param)
e51060f0
SH		 2517 ret = cma_accept_ib(id_priv, conn_param);
2518 else
2519 ret = cma_rep_recv(id_priv);
2520 break;
07ebafba
TT		 2521 case RDMA_TRANSPORT_IWARP:
2522 ret = cma_accept_iw(id_priv, conn_param);
2523 break;
e51060f0
SH		 2524 default:
2525 ret = -ENOSYS;
2526 break;
2527 }
2528
2529 if (ret)
2530 goto reject;
2531
2532 return 0;
2533reject:
c5483388 2534 cma_modify_qp_err(id_priv);
e51060f0
SH		 2535 rdma_reject(id, NULL, 0);
2536 return ret;
2537}
2538EXPORT_SYMBOL(rdma_accept);
2539
0fe313b0
SH		 2540int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2541{
2542 struct rdma_id_private *id_priv;
2543 int ret;
2544
2545 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2546 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2547 return -EINVAL;
2548
2549 switch (id->device->node_type) {
2550 case RDMA_NODE_IB_CA:
2551 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2552 break;
2553 default:
2554 ret = 0;
2555 break;
2556 }
2557 return ret;
2558}
2559EXPORT_SYMBOL(rdma_notify);
2560
e51060f0
SH		 2561int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2562 u8 private_data_len)
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))
e51060f0
SH		 2569 return -EINVAL;
2570
07ebafba
TT		 2571 switch (rdma_node_get_transport(id->device->node_type)) {
2572 case RDMA_TRANSPORT_IB:
c8f6a362 2573 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2574 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2575 private_data, private_data_len);
2576 else
2577 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2578 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2579 0, private_data, private_data_len);
e51060f0 2580 break;
07ebafba
TT		 2581 case RDMA_TRANSPORT_IWARP:
2582 ret = iw_cm_reject(id_priv->cm_id.iw,
2583 private_data, private_data_len);
2584 break;
e51060f0
SH		 2585 default:
2586 ret = -ENOSYS;
2587 break;
2588 }
2589 return ret;
2590}
2591EXPORT_SYMBOL(rdma_reject);
2592
2593int rdma_disconnect(struct rdma_cm_id *id)
2594{
2595 struct rdma_id_private *id_priv;
2596 int ret;
2597
2598 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2599 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2600 return -EINVAL;
2601
07ebafba
TT		 2602 switch (rdma_node_get_transport(id->device->node_type)) {
2603 case RDMA_TRANSPORT_IB:
c5483388 2604 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2605 if (ret)
2606 goto out;
e51060f0
SH		 2607 /* Initiate or respond to a disconnect. */
2608 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2609 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2610 break;
07ebafba
TT		 2611 case RDMA_TRANSPORT_IWARP:
2612 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2613 break;
e51060f0 2614 default:
07ebafba 2615 ret = -EINVAL;
e51060f0
SH		 2616 break;
2617 }
2618out:
2619 return ret;
2620}
2621EXPORT_SYMBOL(rdma_disconnect);
2622
c8f6a362
SH		 2623static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2624{
2625 struct rdma_id_private *id_priv;
2626 struct cma_multicast *mc = multicast->context;
2627 struct rdma_cm_event event;
2628 int ret;
2629
2630 id_priv = mc->id_priv;
de910bd9
OG		 2631 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2632 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
8aa08602 2633 return 0;
c8f6a362 2634
c5483388 2635 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2636 if (!status && id_priv->id.qp)
2637 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2638 multicast->rec.mlid);
c5483388 2639 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2640
2641 memset(&event, 0, sizeof event);
2642 event.status = status;
2643 event.param.ud.private_data = mc->context;
2644 if (!status) {
2645 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2646 ib_init_ah_from_mcmember(id_priv->id.device,
2647 id_priv->id.port_num, &multicast->rec,
2648 &event.param.ud.ah_attr);
2649 event.param.ud.qp_num = 0xFFFFFF;
2650 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2651 } else
2652 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2653
2654 ret = id_priv->id.event_handler(&id_priv->id, &event);
2655 if (ret) {
2656 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2657 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2658 rdma_destroy_id(&id_priv->id);
2659 return 0;
2660 }
8aa08602 2661
de910bd9 2662 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2663 return 0;
2664}
2665
2666static void cma_set_mgid(struct rdma_id_private *id_priv,
2667 struct sockaddr *addr, union ib_gid *mgid)
2668{
2669 unsigned char mc_map[MAX_ADDR_LEN];
2670 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2671 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2672 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2673
2674 if (cma_any_addr(addr)) {
2675 memset(mgid, 0, sizeof *mgid);
2676 } else if ((addr->sa_family == AF_INET6) &&
2677 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) ==
2678 0xFF10A01B)) {
2679 /* IPv6 address is an SA assigned MGID. */
2680 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2681 } else {
a9e527e3 2682 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2683 if (id_priv->id.ps == RDMA_PS_UDP)
2684 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2685 *mgid = *(union ib_gid *) (mc_map + 4);
2686 }
2687}
2688
2689static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2690 struct cma_multicast *mc)
2691{
2692 struct ib_sa_mcmember_rec rec;
2693 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2694 ib_sa_comp_mask comp_mask;
2695 int ret;
2696
2697 ib_addr_get_mgid(dev_addr, &rec.mgid);
2698 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2699 &rec.mgid, &rec);
2700 if (ret)
2701 return ret;
2702
3f446754 2703 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 2704 if (id_priv->id.ps == RDMA_PS_UDP)
2705 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2706 ib_addr_get_sgid(dev_addr, &rec.port_gid);
2707 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2708 rec.join_state = 1;
2709
2710 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2711 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2712 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2713 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2714 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2715
2716 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2717 id_priv->id.port_num, &rec,
2718 comp_mask, GFP_KERNEL,
2719 cma_ib_mc_handler, mc);
2720 if (IS_ERR(mc->multicast.ib))
2721 return PTR_ERR(mc->multicast.ib);
2722
2723 return 0;
2724}
2725
2726int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2727 void *context)
2728{
2729 struct rdma_id_private *id_priv;
2730 struct cma_multicast *mc;
2731 int ret;
2732
2733 id_priv = container_of(id, struct rdma_id_private, id);
2734 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2735 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2736 return -EINVAL;
2737
2738 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2739 if (!mc)
2740 return -ENOMEM;
2741
2742 memcpy(&mc->addr, addr, ip_addr_size(addr));
2743 mc->context = context;
2744 mc->id_priv = id_priv;
2745
2746 spin_lock(&id_priv->lock);
2747 list_add(&mc->list, &id_priv->mc_list);
2748 spin_unlock(&id_priv->lock);
2749
2750 switch (rdma_node_get_transport(id->device->node_type)) {
2751 case RDMA_TRANSPORT_IB:
2752 ret = cma_join_ib_multicast(id_priv, mc);
2753 break;
2754 default:
2755 ret = -ENOSYS;
2756 break;
2757 }
2758
2759 if (ret) {
2760 spin_lock_irq(&id_priv->lock);
2761 list_del(&mc->list);
2762 spin_unlock_irq(&id_priv->lock);
2763 kfree(mc);
2764 }
2765 return ret;
2766}
2767EXPORT_SYMBOL(rdma_join_multicast);
2768
2769void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2770{
2771 struct rdma_id_private *id_priv;
2772 struct cma_multicast *mc;
2773
2774 id_priv = container_of(id, struct rdma_id_private, id);
2775 spin_lock_irq(&id_priv->lock);
2776 list_for_each_entry(mc, &id_priv->mc_list, list) {
2777 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2778 list_del(&mc->list);
2779 spin_unlock_irq(&id_priv->lock);
2780
2781 if (id->qp)
2782 ib_detach_mcast(id->qp,
2783 &mc->multicast.ib->rec.mgid,
2784 mc->multicast.ib->rec.mlid);
2785 ib_sa_free_multicast(mc->multicast.ib);
2786 kfree(mc);
2787 return;
2788 }
2789 }
2790 spin_unlock_irq(&id_priv->lock);
2791}
2792EXPORT_SYMBOL(rdma_leave_multicast);
2793
dd5bdff8
OG		 2794static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
2795{
2796 struct rdma_dev_addr *dev_addr;
2797 struct cma_ndev_work *work;
2798
2799 dev_addr = &id_priv->id.route.addr.dev_addr;
2800
2801 if ((dev_addr->src_dev == ndev) &&
2802 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
2803 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
2804 ndev->name, &id_priv->id);
2805 work = kzalloc(sizeof *work, GFP_KERNEL);
2806 if (!work)
2807 return -ENOMEM;
2808
2809 INIT_WORK(&work->work, cma_ndev_work_handler);
2810 work->id = id_priv;
2811 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
2812 atomic_inc(&id_priv->refcount);
2813 queue_work(cma_wq, &work->work);
2814 }
2815
2816 return 0;
2817}
2818
2819static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
2820 void *ctx)
2821{
2822 struct net_device *ndev = (struct net_device *)ctx;
2823 struct cma_device *cma_dev;
2824 struct rdma_id_private *id_priv;
2825 int ret = NOTIFY_DONE;
2826
2827 if (dev_net(ndev) != &init_net)
2828 return NOTIFY_DONE;
2829
2830 if (event != NETDEV_BONDING_FAILOVER)
2831 return NOTIFY_DONE;
2832
2833 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
2834 return NOTIFY_DONE;
2835
2836 mutex_lock(&lock);
2837 list_for_each_entry(cma_dev, &dev_list, list)
2838 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
2839 ret = cma_netdev_change(ndev, id_priv);
2840 if (ret)
2841 goto out;
2842 }
2843
2844out:
2845 mutex_unlock(&lock);
2846 return ret;
2847}
2848
2849static struct notifier_block cma_nb = {
2850 .notifier_call = cma_netdev_callback
2851};
2852
e51060f0
SH		 2853static void cma_add_one(struct ib_device *device)
2854{
2855 struct cma_device *cma_dev;
2856 struct rdma_id_private *id_priv;
2857
2858 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2859 if (!cma_dev)
2860 return;
2861
2862 cma_dev->device = device;
e51060f0
SH		 2863
2864 init_completion(&cma_dev->comp);
2865 atomic_set(&cma_dev->refcount, 1);
2866 INIT_LIST_HEAD(&cma_dev->id_list);
2867 ib_set_client_data(device, &cma_client, cma_dev);
2868
2869 mutex_lock(&lock);
2870 list_add_tail(&cma_dev->list, &dev_list);
2871 list_for_each_entry(id_priv, &listen_any_list, list)
2872 cma_listen_on_dev(id_priv, cma_dev);
2873 mutex_unlock(&lock);
e51060f0
SH		 2874}
2875
2876static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2877{
a1b1b61f 2878 struct rdma_cm_event event;
e51060f0 2879 enum cma_state state;
de910bd9 2880 int ret = 0;
e51060f0
SH		 2881
2882 /* Record that we want to remove the device */
2883 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2884 if (state == CMA_DESTROYING)
2885 return 0;
2886
2887 cma_cancel_operation(id_priv, state);
de910bd9 2888 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 2889
2890 /* Check for destruction from another callback. */
2891 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
de910bd9 2892 goto out;
e51060f0 2893
a1b1b61f
SH		 2894 memset(&event, 0, sizeof event);
2895 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 2896 ret = id_priv->id.event_handler(&id_priv->id, &event);
2897out:
2898 mutex_unlock(&id_priv->handler_mutex);
2899 return ret;
e51060f0
SH		 2900}
2901
2902static void cma_process_remove(struct cma_device *cma_dev)
2903{
e51060f0
SH		 2904 struct rdma_id_private *id_priv;
2905 int ret;
2906
e51060f0
SH		 2907 mutex_lock(&lock);
2908 while (!list_empty(&cma_dev->id_list)) {
2909 id_priv = list_entry(cma_dev->id_list.next,
2910 struct rdma_id_private, list);
2911
d02d1f53 2912 list_del(&id_priv->listen_list);
94de178a 2913 list_del_init(&id_priv->list);
e51060f0
SH		 2914 atomic_inc(&id_priv->refcount);
2915 mutex_unlock(&lock);
2916
d02d1f53 2917 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 2918 cma_deref_id(id_priv);
2919 if (ret)
2920 rdma_destroy_id(&id_priv->id);
2921
2922 mutex_lock(&lock);
2923 }
2924 mutex_unlock(&lock);
2925
2926 cma_deref_dev(cma_dev);
2927 wait_for_completion(&cma_dev->comp);
2928}
2929
2930static void cma_remove_one(struct ib_device *device)
2931{
2932 struct cma_device *cma_dev;
2933
2934 cma_dev = ib_get_client_data(device, &cma_client);
2935 if (!cma_dev)
2936 return;
2937
2938 mutex_lock(&lock);
2939 list_del(&cma_dev->list);
2940 mutex_unlock(&lock);
2941
2942 cma_process_remove(cma_dev);
2943 kfree(cma_dev);
2944}
2945
2946static int cma_init(void)
2947{
a25de534 2948 int ret, low, high, remaining;
e51060f0 2949
aedec080 2950 get_random_bytes(&next_port, sizeof next_port);
227b60f5 2951 inet_get_local_port_range(&low, &high);
a25de534
AA		 2952 remaining = (high - low) + 1;
2953 next_port = ((unsigned int) next_port % remaining) + low;
227b60f5 2954
c7f743a6 2955 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 2956 if (!cma_wq)
2957 return -ENOMEM;
2958
c1a0b23b 2959 ib_sa_register_client(&sa_client);
7a118df3 2960 rdma_addr_register_client(&addr_client);
dd5bdff8 2961 register_netdevice_notifier(&cma_nb);
c1a0b23b 2962
e51060f0
SH		 2963 ret = ib_register_client(&cma_client);
2964 if (ret)
2965 goto err;
2966 return 0;
2967
2968err:
dd5bdff8 2969 unregister_netdevice_notifier(&cma_nb);
7a118df3 2970 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2971 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2972 destroy_workqueue(cma_wq);
2973 return ret;
2974}
2975
2976static void cma_cleanup(void)
2977{
2978 ib_unregister_client(&cma_client);
dd5bdff8 2979 unregister_netdevice_notifier(&cma_nb);
7a118df3 2980 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2981 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2982 destroy_workqueue(cma_wq);
2983 idr_destroy(&sdp_ps);
2984 idr_destroy(&tcp_ps);
628e5f6d 2985 idr_destroy(&udp_ps);
c8f6a362 2986 idr_destroy(&ipoib_ps);
e51060f0
SH		 2987}
2988
2989module_init(cma_init);
2990module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)