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Linux 2.6.39-rc7
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / core / cma.c
CommitLineData
e51060f0
SH		 1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
a9474917
SH		 7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
e51060f0 12 *
a9474917
SH		 13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
e51060f0 16 *
a9474917
SH		 17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
e51060f0 20 *
a9474917
SH		 21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
e51060f0 25 *
a9474917
SH		 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
e51060f0
SH		 34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/idr.h>
07ebafba 42#include <linux/inetdevice.h>
5a0e3ad6 43#include <linux/slab.h>
e51060f0
SH		 44
45#include <net/tcp.h>
1f5175ad 46#include <net/ipv6.h>
e51060f0
SH		 47
48#include <rdma/rdma_cm.h>
49#include <rdma/rdma_cm_ib.h>
50#include <rdma/ib_cache.h>
51#include <rdma/ib_cm.h>
52#include <rdma/ib_sa.h>
07ebafba 53#include <rdma/iw_cm.h>
e51060f0
SH		 54
55MODULE_AUTHOR("Sean Hefty");
56MODULE_DESCRIPTION("Generic RDMA CM Agent");
57MODULE_LICENSE("Dual BSD/GPL");
58
59#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 60#define CMA_MAX_CM_RETRIES 15
dcb3f974 61#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 62#define CMA_IBOE_PACKET_LIFETIME 18
e51060f0
SH		 63
64static void cma_add_one(struct ib_device *device);
65static void cma_remove_one(struct ib_device *device);
66
67static struct ib_client cma_client = {
68 .name = "cma",
69 .add = cma_add_one,
70 .remove = cma_remove_one
71};
72
c1a0b23b 73static struct ib_sa_client sa_client;
7a118df3 74static struct rdma_addr_client addr_client;
e51060f0
SH		 75static LIST_HEAD(dev_list);
76static LIST_HEAD(listen_any_list);
77static DEFINE_MUTEX(lock);
78static struct workqueue_struct *cma_wq;
79static DEFINE_IDR(sdp_ps);
80static DEFINE_IDR(tcp_ps);
628e5f6d 81static DEFINE_IDR(udp_ps);
c8f6a362 82static DEFINE_IDR(ipoib_ps);
e51060f0
SH		 83
84struct cma_device {
85 struct list_head list;
86 struct ib_device *device;
e51060f0
SH		 87 struct completion comp;
88 atomic_t refcount;
89 struct list_head id_list;
90};
91
92enum cma_state {
93 CMA_IDLE,
94 CMA_ADDR_QUERY,
95 CMA_ADDR_RESOLVED,
96 CMA_ROUTE_QUERY,
97 CMA_ROUTE_RESOLVED,
98 CMA_CONNECT,
99 CMA_DISCONNECT,
100 CMA_ADDR_BOUND,
101 CMA_LISTEN,
102 CMA_DEVICE_REMOVAL,
103 CMA_DESTROYING
104};
105
106struct rdma_bind_list {
107 struct idr *ps;
108 struct hlist_head owners;
109 unsigned short port;
110};
111
112/*
113 * Device removal can occur at anytime, so we need extra handling to
114 * serialize notifying the user of device removal with other callbacks.
115 * We do this by disabling removal notification while a callback is in process,
116 * and reporting it after the callback completes.
117 */
118struct rdma_id_private {
119 struct rdma_cm_id id;
120
121 struct rdma_bind_list *bind_list;
122 struct hlist_node node;
d02d1f53
SH		 123 struct list_head list; /* listen_any_list or cma_device.list */
124 struct list_head listen_list; /* per device listens */
e51060f0 125 struct cma_device *cma_dev;
c8f6a362 126 struct list_head mc_list;
e51060f0 127
d02d1f53 128 int internal_id;
e51060f0
SH		 129 enum cma_state state;
130 spinlock_t lock;
c5483388
SH		 131 struct mutex qp_mutex;
132
e51060f0
SH		 133 struct completion comp;
134 atomic_t refcount;
de910bd9 135 struct mutex handler_mutex;
e51060f0
SH		 136
137 int backlog;
138 int timeout_ms;
139 struct ib_sa_query *query;
140 int query_id;
141 union {
142 struct ib_cm_id *ib;
07ebafba 143 struct iw_cm_id *iw;
e51060f0
SH		 144 } cm_id;
145
146 u32 seq_num;
c8f6a362 147 u32 qkey;
e51060f0 148 u32 qp_num;
e51060f0 149 u8 srq;
a81c994d 150 u8 tos;
e51060f0
SH		 151};
152
c8f6a362
SH		 153struct cma_multicast {
154 struct rdma_id_private *id_priv;
155 union {
156 struct ib_sa_multicast *ib;
157 } multicast;
158 struct list_head list;
159 void *context;
3f446754 160 struct sockaddr_storage addr;
3c86aa70 161 struct kref mcref;
c8f6a362
SH		 162};
163
e51060f0
SH		 164struct cma_work {
165 struct work_struct work;
166 struct rdma_id_private *id;
167 enum cma_state old_state;
168 enum cma_state new_state;
169 struct rdma_cm_event event;
170};
171
dd5bdff8
OG		 172struct cma_ndev_work {
173 struct work_struct work;
174 struct rdma_id_private *id;
175 struct rdma_cm_event event;
176};
177
3c86aa70
EC		 178struct iboe_mcast_work {
179 struct work_struct work;
180 struct rdma_id_private *id;
181 struct cma_multicast *mc;
182};
183
e51060f0
SH		 184union cma_ip_addr {
185 struct in6_addr ip6;
186 struct {
1b90c137
AV		 187 __be32 pad[3];
188 __be32 addr;
e51060f0
SH		 189 } ip4;
190};
191
192struct cma_hdr {
193 u8 cma_version;
194 u8 ip_version; /* IP version: 7:4 */
1b90c137 195 __be16 port;
e51060f0
SH		 196 union cma_ip_addr src_addr;
197 union cma_ip_addr dst_addr;
198};
199
200struct sdp_hh {
201 u8 bsdh[16];
202 u8 sdp_version; /* Major version: 7:4 */
203 u8 ip_version; /* IP version: 7:4 */
204 u8 sdp_specific1[10];
1b90c137
AV		 205 __be16 port;
206 __be16 sdp_specific2;
e51060f0
SH		 207 union cma_ip_addr src_addr;
208 union cma_ip_addr dst_addr;
209};
210
211struct sdp_hah {
212 u8 bsdh[16];
213 u8 sdp_version;
214};
215
216#define CMA_VERSION 0x00
217#define SDP_MAJ_VERSION 0x2
218
219static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
220{
221 unsigned long flags;
222 int ret;
223
224 spin_lock_irqsave(&id_priv->lock, flags);
225 ret = (id_priv->state == comp);
226 spin_unlock_irqrestore(&id_priv->lock, flags);
227 return ret;
228}
229
230static int cma_comp_exch(struct rdma_id_private *id_priv,
231 enum cma_state comp, enum cma_state exch)
232{
233 unsigned long flags;
234 int ret;
235
236 spin_lock_irqsave(&id_priv->lock, flags);
237 if ((ret = (id_priv->state == comp)))
238 id_priv->state = exch;
239 spin_unlock_irqrestore(&id_priv->lock, flags);
240 return ret;
241}
242
243static enum cma_state cma_exch(struct rdma_id_private *id_priv,
244 enum cma_state exch)
245{
246 unsigned long flags;
247 enum cma_state old;
248
249 spin_lock_irqsave(&id_priv->lock, flags);
250 old = id_priv->state;
251 id_priv->state = exch;
252 spin_unlock_irqrestore(&id_priv->lock, flags);
253 return old;
254}
255
256static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
257{
258 return hdr->ip_version >> 4;
259}
260
261static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
262{
263 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
264}
265
266static inline u8 sdp_get_majv(u8 sdp_version)
267{
268 return sdp_version >> 4;
269}
270
271static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
272{
273 return hh->ip_version >> 4;
274}
275
276static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
277{
278 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
279}
280
c8f6a362
SH		 281static inline int cma_is_ud_ps(enum rdma_port_space ps)
282{
283 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
284}
285
e51060f0
SH		 286static void cma_attach_to_dev(struct rdma_id_private *id_priv,
287 struct cma_device *cma_dev)
288{
289 atomic_inc(&cma_dev->refcount);
290 id_priv->cma_dev = cma_dev;
291 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 292 id_priv->id.route.addr.dev_addr.transport =
293 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0
SH		 294 list_add_tail(&id_priv->list, &cma_dev->id_list);
295}
296
297static inline void cma_deref_dev(struct cma_device *cma_dev)
298{
299 if (atomic_dec_and_test(&cma_dev->refcount))
300 complete(&cma_dev->comp);
301}
302
3c86aa70
EC		 303static inline void release_mc(struct kref *kref)
304{
305 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
306
307 kfree(mc->multicast.ib);
308 kfree(mc);
309}
310
a396d43a 311static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 312{
a396d43a 313 mutex_lock(&lock);
e51060f0
SH		 314 list_del(&id_priv->list);
315 cma_deref_dev(id_priv->cma_dev);
316 id_priv->cma_dev = NULL;
a396d43a 317 mutex_unlock(&lock);
e51060f0
SH		 318}
319
d2ca39f2 320static int cma_set_qkey(struct rdma_id_private *id_priv)
c8f6a362
SH		 321{
322 struct ib_sa_mcmember_rec rec;
323 int ret = 0;
324
d2ca39f2
YE		 325 if (id_priv->qkey)
326 return 0;
327
328 switch (id_priv->id.ps) {
c8f6a362 329 case RDMA_PS_UDP:
d2ca39f2 330 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 331 break;
332 case RDMA_PS_IPOIB:
d2ca39f2
YE		 333 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
334 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
335 id_priv->id.port_num, &rec.mgid,
336 &rec);
337 if (!ret)
338 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 339 break;
340 default:
341 break;
342 }
343 return ret;
344}
345
3c86aa70
EC		 346static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
347{
348 int i;
349 int err;
350 struct ib_port_attr props;
351 union ib_gid tmp;
352
353 err = ib_query_port(device, port_num, &props);
354 if (err)
355 return 1;
356
357 for (i = 0; i < props.gid_tbl_len; ++i) {
358 err = ib_query_gid(device, port_num, i, &tmp);
359 if (err)
360 return 1;
361 if (!memcmp(&tmp, gid, sizeof tmp))
362 return 0;
363 }
364
365 return -EAGAIN;
366}
367
07ebafba 368static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 369{
c8f6a362 370 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 371 struct cma_device *cma_dev;
3c86aa70 372 union ib_gid gid, iboe_gid;
e51060f0 373 int ret = -ENODEV;
3c86aa70
EC		 374 u8 port;
375 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
376 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
e51060f0 377
a396d43a 378 mutex_lock(&lock);
3c86aa70
EC		 379 iboe_addr_get_sgid(dev_addr, &iboe_gid);
380 memcpy(&gid, dev_addr->src_dev_addr +
381 rdma_addr_gid_offset(dev_addr), sizeof gid);
e51060f0 382 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70
EC		 383 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
384 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
385 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
386 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
387 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
388 else
389 ret = find_gid_port(cma_dev->device, &gid, port);
390
391 if (!ret) {
392 id_priv->id.port_num = port;
393 goto out;
394 } else if (ret == 1)
395 break;
396 }
e51060f0
SH		 397 }
398 }
3c86aa70
EC		 399
400out:
401 if (!ret)
402 cma_attach_to_dev(id_priv, cma_dev);
403
a396d43a 404 mutex_unlock(&lock);
e51060f0
SH		 405 return ret;
406}
407
e51060f0
SH		 408static void cma_deref_id(struct rdma_id_private *id_priv)
409{
410 if (atomic_dec_and_test(&id_priv->refcount))
411 complete(&id_priv->comp);
412}
413
de910bd9 414static int cma_disable_callback(struct rdma_id_private *id_priv,
8aa08602
SH		 415 enum cma_state state)
416{
de910bd9
OG		 417 mutex_lock(&id_priv->handler_mutex);
418 if (id_priv->state != state) {
419 mutex_unlock(&id_priv->handler_mutex);
420 return -EINVAL;
421 }
422 return 0;
e51060f0
SH		 423}
424
6c719f5c
SH		 425static int cma_has_cm_dev(struct rdma_id_private *id_priv)
426{
427 return (id_priv->id.device && id_priv->cm_id.ib);
428}
429
e51060f0
SH		 430struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
431 void *context, enum rdma_port_space ps)
432{
433 struct rdma_id_private *id_priv;
434
435 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
436 if (!id_priv)
437 return ERR_PTR(-ENOMEM);
438
439 id_priv->state = CMA_IDLE;
440 id_priv->id.context = context;
441 id_priv->id.event_handler = event_handler;
442 id_priv->id.ps = ps;
443 spin_lock_init(&id_priv->lock);
c5483388 444 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 445 init_completion(&id_priv->comp);
446 atomic_set(&id_priv->refcount, 1);
de910bd9 447 mutex_init(&id_priv->handler_mutex);
e51060f0 448 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 449 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 450 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
451
452 return &id_priv->id;
453}
454EXPORT_SYMBOL(rdma_create_id);
455
c8f6a362 456static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 457{
458 struct ib_qp_attr qp_attr;
c8f6a362 459 int qp_attr_mask, ret;
e51060f0 460
c8f6a362
SH		 461 qp_attr.qp_state = IB_QPS_INIT;
462 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 463 if (ret)
464 return ret;
465
c8f6a362
SH		 466 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
467 if (ret)
468 return ret;
469
470 qp_attr.qp_state = IB_QPS_RTR;
471 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
472 if (ret)
473 return ret;
474
475 qp_attr.qp_state = IB_QPS_RTS;
476 qp_attr.sq_psn = 0;
477 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
478
479 return ret;
e51060f0
SH		 480}
481
c8f6a362 482static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 483{
484 struct ib_qp_attr qp_attr;
c8f6a362 485 int qp_attr_mask, ret;
07ebafba
TT		 486
487 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 488 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
489 if (ret)
490 return ret;
07ebafba 491
c8f6a362 492 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 493}
494
e51060f0
SH		 495int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
496 struct ib_qp_init_attr *qp_init_attr)
497{
498 struct rdma_id_private *id_priv;
499 struct ib_qp *qp;
500 int ret;
501
502 id_priv = container_of(id, struct rdma_id_private, id);
503 if (id->device != pd->device)
504 return -EINVAL;
505
506 qp = ib_create_qp(pd, qp_init_attr);
507 if (IS_ERR(qp))
508 return PTR_ERR(qp);
509
c8f6a362
SH		 510 if (cma_is_ud_ps(id_priv->id.ps))
511 ret = cma_init_ud_qp(id_priv, qp);
512 else
513 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 514 if (ret)
515 goto err;
516
517 id->qp = qp;
518 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 519 id_priv->srq = (qp->srq != NULL);
520 return 0;
521err:
522 ib_destroy_qp(qp);
523 return ret;
524}
525EXPORT_SYMBOL(rdma_create_qp);
526
527void rdma_destroy_qp(struct rdma_cm_id *id)
528{
c5483388
SH		 529 struct rdma_id_private *id_priv;
530
531 id_priv = container_of(id, struct rdma_id_private, id);
532 mutex_lock(&id_priv->qp_mutex);
533 ib_destroy_qp(id_priv->id.qp);
534 id_priv->id.qp = NULL;
535 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 536}
537EXPORT_SYMBOL(rdma_destroy_qp);
538
5851bb89
SH		 539static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
540 struct rdma_conn_param *conn_param)
e51060f0
SH		 541{
542 struct ib_qp_attr qp_attr;
543 int qp_attr_mask, ret;
544
c5483388
SH		 545 mutex_lock(&id_priv->qp_mutex);
546 if (!id_priv->id.qp) {
547 ret = 0;
548 goto out;
549 }
e51060f0
SH		 550
551 /* Need to update QP attributes from default values. */
552 qp_attr.qp_state = IB_QPS_INIT;
c5483388 553 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 554 if (ret)
c5483388 555 goto out;
e51060f0 556
c5483388 557 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 558 if (ret)
c5483388 559 goto out;
e51060f0
SH		 560
561 qp_attr.qp_state = IB_QPS_RTR;
c5483388 562 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 563 if (ret)
c5483388 564 goto out;
e51060f0 565
5851bb89
SH		 566 if (conn_param)
567 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 568 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
569out:
570 mutex_unlock(&id_priv->qp_mutex);
571 return ret;
e51060f0
SH		 572}
573
5851bb89
SH		 574static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
575 struct rdma_conn_param *conn_param)
e51060f0
SH		 576{
577 struct ib_qp_attr qp_attr;
578 int qp_attr_mask, ret;
579
c5483388
SH		 580 mutex_lock(&id_priv->qp_mutex);
581 if (!id_priv->id.qp) {
582 ret = 0;
583 goto out;
584 }
e51060f0
SH		 585
586 qp_attr.qp_state = IB_QPS_RTS;
c5483388 587 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 588 if (ret)
c5483388 589 goto out;
e51060f0 590
5851bb89
SH		 591 if (conn_param)
592 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 593 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
594out:
595 mutex_unlock(&id_priv->qp_mutex);
596 return ret;
e51060f0
SH		 597}
598
c5483388 599static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 600{
601 struct ib_qp_attr qp_attr;
c5483388 602 int ret;
e51060f0 603
c5483388
SH		 604 mutex_lock(&id_priv->qp_mutex);
605 if (!id_priv->id.qp) {
606 ret = 0;
607 goto out;
608 }
e51060f0
SH		 609
610 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 611 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
612out:
613 mutex_unlock(&id_priv->qp_mutex);
614 return ret;
e51060f0
SH		 615}
616
c8f6a362
SH		 617static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
618 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
619{
620 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
621 int ret;
3c86aa70
EC		 622 u16 pkey;
623
624 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
625 IB_LINK_LAYER_INFINIBAND)
626 pkey = ib_addr_get_pkey(dev_addr);
627 else
628 pkey = 0xffff;
c8f6a362
SH		 629
630 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 631 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 632 if (ret)
633 return ret;
634
635 qp_attr->port_num = id_priv->id.port_num;
636 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
637
638 if (cma_is_ud_ps(id_priv->id.ps)) {
d2ca39f2
YE		 639 ret = cma_set_qkey(id_priv);
640 if (ret)
641 return ret;
642
c8f6a362
SH		 643 qp_attr->qkey = id_priv->qkey;
644 *qp_attr_mask |= IB_QP_QKEY;
645 } else {
646 qp_attr->qp_access_flags = 0;
647 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
648 }
649 return 0;
650}
651
e51060f0
SH		 652int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
653 int *qp_attr_mask)
654{
655 struct rdma_id_private *id_priv;
c8f6a362 656 int ret = 0;
e51060f0
SH		 657
658 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 659 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
660 case RDMA_TRANSPORT_IB:
c8f6a362
SH		 661 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
662 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
663 else
664 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
665 qp_attr_mask);
e51060f0
SH		 666 if (qp_attr->qp_state == IB_QPS_RTR)
667 qp_attr->rq_psn = id_priv->seq_num;
668 break;
07ebafba 669 case RDMA_TRANSPORT_IWARP:
c8f6a362 670 if (!id_priv->cm_id.iw) {
8f076531 671 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 672 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
673 } else
674 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
675 qp_attr_mask);
07ebafba 676 break;
e51060f0
SH		 677 default:
678 ret = -ENOSYS;
679 break;
680 }
681
682 return ret;
683}
684EXPORT_SYMBOL(rdma_init_qp_attr);
685
686static inline int cma_zero_addr(struct sockaddr *addr)
687{
688 struct in6_addr *ip6;
689
690 if (addr->sa_family == AF_INET)
6360a02a
JP		 691 return ipv4_is_zeronet(
692 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
e51060f0
SH		 693 else {
694 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
695 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 696 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 697 }
698}
699
700static inline int cma_loopback_addr(struct sockaddr *addr)
701{
1f5175ad
AS		 702 if (addr->sa_family == AF_INET)
703 return ipv4_is_loopback(
704 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
705 else
706 return ipv6_addr_loopback(
707 &((struct sockaddr_in6 *) addr)->sin6_addr);
e51060f0
SH		 708}
709
710static inline int cma_any_addr(struct sockaddr *addr)
711{
712 return cma_zero_addr(addr) || cma_loopback_addr(addr);
713}
714
628e5f6d
SH		 715static inline __be16 cma_port(struct sockaddr *addr)
716{
717 if (addr->sa_family == AF_INET)
718 return ((struct sockaddr_in *) addr)->sin_port;
719 else
720 return ((struct sockaddr_in6 *) addr)->sin6_port;
721}
722
e51060f0
SH		 723static inline int cma_any_port(struct sockaddr *addr)
724{
628e5f6d 725 return !cma_port(addr);
e51060f0
SH		 726}
727
728static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
1b90c137 729 u8 *ip_ver, __be16 *port,
e51060f0
SH		 730 union cma_ip_addr **src, union cma_ip_addr **dst)
731{
732 switch (ps) {
733 case RDMA_PS_SDP:
734 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
735 SDP_MAJ_VERSION)
736 return -EINVAL;
737
738 *ip_ver = sdp_get_ip_ver(hdr);
739 *port = ((struct sdp_hh *) hdr)->port;
740 *src = &((struct sdp_hh *) hdr)->src_addr;
741 *dst = &((struct sdp_hh *) hdr)->dst_addr;
742 break;
743 default:
744 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
745 return -EINVAL;
746
747 *ip_ver = cma_get_ip_ver(hdr);
748 *port = ((struct cma_hdr *) hdr)->port;
749 *src = &((struct cma_hdr *) hdr)->src_addr;
750 *dst = &((struct cma_hdr *) hdr)->dst_addr;
751 break;
752 }
753
754 if (*ip_ver != 4 && *ip_ver != 6)
755 return -EINVAL;
756 return 0;
757}
758
759static void cma_save_net_info(struct rdma_addr *addr,
760 struct rdma_addr *listen_addr,
1b90c137 761 u8 ip_ver, __be16 port,
e51060f0
SH		 762 union cma_ip_addr *src, union cma_ip_addr *dst)
763{
764 struct sockaddr_in *listen4, *ip4;
765 struct sockaddr_in6 *listen6, *ip6;
766
767 switch (ip_ver) {
768 case 4:
769 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
770 ip4 = (struct sockaddr_in *) &addr->src_addr;
771 ip4->sin_family = listen4->sin_family;
772 ip4->sin_addr.s_addr = dst->ip4.addr;
773 ip4->sin_port = listen4->sin_port;
774
775 ip4 = (struct sockaddr_in *) &addr->dst_addr;
776 ip4->sin_family = listen4->sin_family;
777 ip4->sin_addr.s_addr = src->ip4.addr;
778 ip4->sin_port = port;
779 break;
780 case 6:
781 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
782 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
783 ip6->sin6_family = listen6->sin6_family;
784 ip6->sin6_addr = dst->ip6;
785 ip6->sin6_port = listen6->sin6_port;
786
787 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
788 ip6->sin6_family = listen6->sin6_family;
789 ip6->sin6_addr = src->ip6;
790 ip6->sin6_port = port;
791 break;
792 default:
793 break;
794 }
795}
796
797static inline int cma_user_data_offset(enum rdma_port_space ps)
798{
799 switch (ps) {
800 case RDMA_PS_SDP:
801 return 0;
802 default:
803 return sizeof(struct cma_hdr);
804 }
805}
806
e51060f0
SH		 807static void cma_cancel_route(struct rdma_id_private *id_priv)
808{
3c86aa70
EC		 809 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
810 case IB_LINK_LAYER_INFINIBAND:
e51060f0
SH		 811 if (id_priv->query)
812 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
813 break;
814 default:
815 break;
816 }
817}
818
e51060f0
SH		 819static void cma_cancel_listens(struct rdma_id_private *id_priv)
820{
821 struct rdma_id_private *dev_id_priv;
822
d02d1f53
SH		 823 /*
824 * Remove from listen_any_list to prevent added devices from spawning
825 * additional listen requests.
826 */
e51060f0
SH		 827 mutex_lock(&lock);
828 list_del(&id_priv->list);
829
830 while (!list_empty(&id_priv->listen_list)) {
831 dev_id_priv = list_entry(id_priv->listen_list.next,
832 struct rdma_id_private, listen_list);
d02d1f53
SH		 833 /* sync with device removal to avoid duplicate destruction */
834 list_del_init(&dev_id_priv->list);
835 list_del(&dev_id_priv->listen_list);
836 mutex_unlock(&lock);
837
838 rdma_destroy_id(&dev_id_priv->id);
839 mutex_lock(&lock);
e51060f0
SH		 840 }
841 mutex_unlock(&lock);
842}
843
844static void cma_cancel_operation(struct rdma_id_private *id_priv,
845 enum cma_state state)
846{
847 switch (state) {
848 case CMA_ADDR_QUERY:
849 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
850 break;
851 case CMA_ROUTE_QUERY:
852 cma_cancel_route(id_priv);
853 break;
854 case CMA_LISTEN:
3f446754
RD		 855 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
856 && !id_priv->cma_dev)
e51060f0
SH		 857 cma_cancel_listens(id_priv);
858 break;
859 default:
860 break;
861 }
862}
863
864static void cma_release_port(struct rdma_id_private *id_priv)
865{
866 struct rdma_bind_list *bind_list = id_priv->bind_list;
867
868 if (!bind_list)
869 return;
870
871 mutex_lock(&lock);
872 hlist_del(&id_priv->node);
873 if (hlist_empty(&bind_list->owners)) {
874 idr_remove(bind_list->ps, bind_list->port);
875 kfree(bind_list);
876 }
877 mutex_unlock(&lock);
878}
879
c8f6a362
SH		 880static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
881{
882 struct cma_multicast *mc;
883
884 while (!list_empty(&id_priv->mc_list)) {
885 mc = container_of(id_priv->mc_list.next,
886 struct cma_multicast, list);
887 list_del(&mc->list);
3c86aa70
EC		 888 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
889 case IB_LINK_LAYER_INFINIBAND:
890 ib_sa_free_multicast(mc->multicast.ib);
891 kfree(mc);
892 break;
893 case IB_LINK_LAYER_ETHERNET:
894 kref_put(&mc->mcref, release_mc);
895 break;
896 default:
897 break;
898 }
c8f6a362
SH		 899 }
900}
901
e51060f0
SH		 902void rdma_destroy_id(struct rdma_cm_id *id)
903{
904 struct rdma_id_private *id_priv;
905 enum cma_state state;
906
907 id_priv = container_of(id, struct rdma_id_private, id);
908 state = cma_exch(id_priv, CMA_DESTROYING);
909 cma_cancel_operation(id_priv, state);
910
a396d43a
SH		 911 /*
912 * Wait for any active callback to finish. New callbacks will find
913 * the id_priv state set to destroying and abort.
914 */
915 mutex_lock(&id_priv->handler_mutex);
916 mutex_unlock(&id_priv->handler_mutex);
917
e51060f0 918 if (id_priv->cma_dev) {
3c86aa70 919 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
07ebafba 920 case RDMA_TRANSPORT_IB:
3cd96564 921 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 922 ib_destroy_cm_id(id_priv->cm_id.ib);
923 break;
07ebafba
TT		 924 case RDMA_TRANSPORT_IWARP:
925 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
926 iw_destroy_cm_id(id_priv->cm_id.iw);
927 break;
e51060f0
SH		 928 default:
929 break;
930 }
c8f6a362 931 cma_leave_mc_groups(id_priv);
a396d43a 932 cma_release_dev(id_priv);
e51060f0
SH		 933 }
934
935 cma_release_port(id_priv);
936 cma_deref_id(id_priv);
937 wait_for_completion(&id_priv->comp);
938
d02d1f53
SH		 939 if (id_priv->internal_id)
940 cma_deref_id(id_priv->id.context);
941
e51060f0
SH		 942 kfree(id_priv->id.route.path_rec);
943 kfree(id_priv);
944}
945EXPORT_SYMBOL(rdma_destroy_id);
946
947static int cma_rep_recv(struct rdma_id_private *id_priv)
948{
949 int ret;
950
5851bb89 951 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 952 if (ret)
953 goto reject;
954
5851bb89 955 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 956 if (ret)
957 goto reject;
958
959 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
960 if (ret)
961 goto reject;
962
963 return 0;
964reject:
c5483388 965 cma_modify_qp_err(id_priv);
e51060f0
SH		 966 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
967 NULL, 0, NULL, 0);
968 return ret;
969}
970
971static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
972{
973 if (id_priv->id.ps == RDMA_PS_SDP &&
974 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
975 SDP_MAJ_VERSION)
976 return -EINVAL;
977
978 return 0;
979}
980
a1b1b61f
SH		 981static void cma_set_rep_event_data(struct rdma_cm_event *event,
982 struct ib_cm_rep_event_param *rep_data,
983 void *private_data)
984{
985 event->param.conn.private_data = private_data;
986 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
987 event->param.conn.responder_resources = rep_data->responder_resources;
988 event->param.conn.initiator_depth = rep_data->initiator_depth;
989 event->param.conn.flow_control = rep_data->flow_control;
990 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
991 event->param.conn.srq = rep_data->srq;
992 event->param.conn.qp_num = rep_data->remote_qpn;
993}
994
e51060f0
SH		 995static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
996{
997 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 998 struct rdma_cm_event event;
999 int ret = 0;
e51060f0 1000
38ca83a5
AV		 1001 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1002 cma_disable_callback(id_priv, CMA_CONNECT)) ||
1003 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1004 cma_disable_callback(id_priv, CMA_DISCONNECT)))
8aa08602 1005 return 0;
e51060f0 1006
a1b1b61f 1007 memset(&event, 0, sizeof event);
e51060f0
SH		 1008 switch (ib_event->event) {
1009 case IB_CM_REQ_ERROR:
1010 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1011 event.event = RDMA_CM_EVENT_UNREACHABLE;
1012 event.status = -ETIMEDOUT;
e51060f0
SH		 1013 break;
1014 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 1015 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1016 if (event.status)
1017 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 1018 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 1019 event.status = cma_rep_recv(id_priv);
1020 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1021 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 1022 } else
a1b1b61f
SH		 1023 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1024 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1025 ib_event->private_data);
e51060f0
SH		 1026 break;
1027 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1028 case IB_CM_USER_ESTABLISHED:
1029 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1030 break;
1031 case IB_CM_DREQ_ERROR:
a1b1b61f 1032 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1033 case IB_CM_DREQ_RECEIVED:
1034 case IB_CM_DREP_RECEIVED:
1035 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
1036 goto out;
a1b1b61f 1037 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1038 break;
1039 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1040 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1041 break;
e51060f0
SH		 1042 case IB_CM_MRA_RECEIVED:
1043 /* ignore event */
1044 goto out;
1045 case IB_CM_REJ_RECEIVED:
c5483388 1046 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1047 event.status = ib_event->param.rej_rcvd.reason;
1048 event.event = RDMA_CM_EVENT_REJECTED;
1049 event.param.conn.private_data = ib_event->private_data;
1050 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1051 break;
1052 default:
468f2239 1053 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1054 ib_event->event);
1055 goto out;
1056 }
1057
a1b1b61f 1058 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1059 if (ret) {
1060 /* Destroy the CM ID by returning a non-zero value. */
1061 id_priv->cm_id.ib = NULL;
1062 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1063 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1064 rdma_destroy_id(&id_priv->id);
1065 return ret;
1066 }
1067out:
de910bd9 1068 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1069 return ret;
1070}
1071
628e5f6d
SH		 1072static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1073 struct ib_cm_event *ib_event)
e51060f0
SH		 1074{
1075 struct rdma_id_private *id_priv;
1076 struct rdma_cm_id *id;
1077 struct rdma_route *rt;
1078 union cma_ip_addr *src, *dst;
1b90c137 1079 __be16 port;
e51060f0 1080 u8 ip_ver;
64c5e613 1081 int ret;
e51060f0 1082
3f168d2b
KK		 1083 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1084 &ip_ver, &port, &src, &dst))
1085 goto err;
1086
e51060f0
SH		 1087 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1088 listen_id->ps);
1089 if (IS_ERR(id))
3f168d2b
KK		 1090 goto err;
1091
1092 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1093 ip_ver, port, src, dst);
e51060f0
SH		 1094
1095 rt = &id->route;
1096 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1097 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1098 GFP_KERNEL);
e51060f0 1099 if (!rt->path_rec)
3f168d2b 1100 goto destroy_id;
e51060f0 1101
e51060f0
SH		 1102 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1103 if (rt->num_paths == 2)
1104 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1105
6f8372b6
SH		 1106 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1107 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1108 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1109 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1110 } else {
1111 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1112 &rt->addr.dev_addr);
1113 if (ret)
1114 goto destroy_id;
1115 }
1116 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0
SH		 1117
1118 id_priv = container_of(id, struct rdma_id_private, id);
1119 id_priv->state = CMA_CONNECT;
1120 return id_priv;
3f168d2b
KK		 1121
1122destroy_id:
e51060f0 1123 rdma_destroy_id(id);
3f168d2b 1124err:
e51060f0
SH		 1125 return NULL;
1126}
1127
628e5f6d
SH		 1128static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1129 struct ib_cm_event *ib_event)
1130{
1131 struct rdma_id_private *id_priv;
1132 struct rdma_cm_id *id;
1133 union cma_ip_addr *src, *dst;
1b90c137 1134 __be16 port;
628e5f6d
SH		 1135 u8 ip_ver;
1136 int ret;
1137
1138 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1139 listen_id->ps);
1140 if (IS_ERR(id))
1141 return NULL;
1142
1143
1144 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1145 &ip_ver, &port, &src, &dst))
1146 goto err;
1147
1148 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1149 ip_ver, port, src, dst);
1150
6f8372b6
SH		 1151 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1152 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1153 &id->route.addr.dev_addr);
1154 if (ret)
1155 goto err;
1156 }
628e5f6d
SH		 1157
1158 id_priv = container_of(id, struct rdma_id_private, id);
1159 id_priv->state = CMA_CONNECT;
1160 return id_priv;
1161err:
1162 rdma_destroy_id(id);
1163 return NULL;
1164}
1165
a1b1b61f
SH		 1166static void cma_set_req_event_data(struct rdma_cm_event *event,
1167 struct ib_cm_req_event_param *req_data,
1168 void *private_data, int offset)
1169{
1170 event->param.conn.private_data = private_data + offset;
1171 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1172 event->param.conn.responder_resources = req_data->responder_resources;
1173 event->param.conn.initiator_depth = req_data->initiator_depth;
1174 event->param.conn.flow_control = req_data->flow_control;
1175 event->param.conn.retry_count = req_data->retry_count;
1176 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1177 event->param.conn.srq = req_data->srq;
1178 event->param.conn.qp_num = req_data->remote_qpn;
1179}
1180
e51060f0
SH		 1181static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1182{
1183 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1184 struct rdma_cm_event event;
e51060f0
SH		 1185 int offset, ret;
1186
1187 listen_id = cm_id->context;
de910bd9 1188 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1189 return -ECONNABORTED;
e51060f0 1190
628e5f6d
SH		 1191 memset(&event, 0, sizeof event);
1192 offset = cma_user_data_offset(listen_id->id.ps);
1193 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
c8f6a362 1194 if (cma_is_ud_ps(listen_id->id.ps)) {
628e5f6d
SH		 1195 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1196 event.param.ud.private_data = ib_event->private_data + offset;
1197 event.param.ud.private_data_len =
1198 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1199 } else {
1200 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1201 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1202 ib_event->private_data, offset);
1203 }
e51060f0
SH		 1204 if (!conn_id) {
1205 ret = -ENOMEM;
1206 goto out;
1207 }
1208
de910bd9 1209 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba 1210 ret = cma_acquire_dev(conn_id);
a1a733f6
KK		 1211 if (ret)
1212 goto release_conn_id;
e51060f0
SH		 1213
1214 conn_id->cm_id.ib = cm_id;
1215 cm_id->context = conn_id;
1216 cm_id->cm_handler = cma_ib_handler;
1217
25ae21a1
SH		 1218 /*
1219 * Protect against the user destroying conn_id from another thread
1220 * until we're done accessing it.
1221 */
1222 atomic_inc(&conn_id->refcount);
a1b1b61f 1223 ret = conn_id->id.event_handler(&conn_id->id, &event);
45d9478d 1224 if (!ret) {
ead595ae
SH		 1225 /*
1226 * Acquire mutex to prevent user executing rdma_destroy_id()
1227 * while we're accessing the cm_id.
1228 */
1229 mutex_lock(&lock);
1230 if (cma_comp(conn_id, CMA_CONNECT) &&
1231 !cma_is_ud_ps(conn_id->id.ps))
1232 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1233 mutex_unlock(&lock);
de910bd9 1234 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1235 cma_deref_id(conn_id);
a1a733f6 1236 goto out;
45d9478d 1237 }
25ae21a1 1238 cma_deref_id(conn_id);
a1a733f6
KK		 1239
1240 /* Destroy the CM ID by returning a non-zero value. */
1241 conn_id->cm_id.ib = NULL;
1242
1243release_conn_id:
1244 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1245 mutex_unlock(&conn_id->handler_mutex);
a1a733f6
KK		 1246 rdma_destroy_id(&conn_id->id);
1247
e51060f0 1248out:
de910bd9 1249 mutex_unlock(&listen_id->handler_mutex);
e51060f0
SH		 1250 return ret;
1251}
1252
1253static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1254{
628e5f6d 1255 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1256}
1257
1258static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1259 struct ib_cm_compare_data *compare)
1260{
1261 struct cma_hdr *cma_data, *cma_mask;
1262 struct sdp_hh *sdp_data, *sdp_mask;
1b90c137 1263 __be32 ip4_addr;
e51060f0
SH		 1264 struct in6_addr ip6_addr;
1265
1266 memset(compare, 0, sizeof *compare);
1267 cma_data = (void *) compare->data;
1268 cma_mask = (void *) compare->mask;
1269 sdp_data = (void *) compare->data;
1270 sdp_mask = (void *) compare->mask;
1271
1272 switch (addr->sa_family) {
1273 case AF_INET:
1274 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1275 if (ps == RDMA_PS_SDP) {
1276 sdp_set_ip_ver(sdp_data, 4);
1277 sdp_set_ip_ver(sdp_mask, 0xF);
1278 sdp_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1279 sdp_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1280 } else {
1281 cma_set_ip_ver(cma_data, 4);
1282 cma_set_ip_ver(cma_mask, 0xF);
1283 cma_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1284 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1285 }
1286 break;
1287 case AF_INET6:
1288 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1289 if (ps == RDMA_PS_SDP) {
1290 sdp_set_ip_ver(sdp_data, 6);
1291 sdp_set_ip_ver(sdp_mask, 0xF);
1292 sdp_data->dst_addr.ip6 = ip6_addr;
1293 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1294 sizeof sdp_mask->dst_addr.ip6);
1295 } else {
1296 cma_set_ip_ver(cma_data, 6);
1297 cma_set_ip_ver(cma_mask, 0xF);
1298 cma_data->dst_addr.ip6 = ip6_addr;
1299 memset(&cma_mask->dst_addr.ip6, 0xFF,
1300 sizeof cma_mask->dst_addr.ip6);
1301 }
1302 break;
1303 default:
1304 break;
1305 }
1306}
1307
07ebafba
TT		 1308static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1309{
1310 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1311 struct rdma_cm_event event;
07ebafba
TT		 1312 struct sockaddr_in *sin;
1313 int ret = 0;
1314
de910bd9 1315 if (cma_disable_callback(id_priv, CMA_CONNECT))
be65f086 1316 return 0;
07ebafba 1317
be65f086 1318 memset(&event, 0, sizeof event);
07ebafba
TT		 1319 switch (iw_event->event) {
1320 case IW_CM_EVENT_CLOSE:
a1b1b61f 1321 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1322 break;
1323 case IW_CM_EVENT_CONNECT_REPLY:
1324 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1325 *sin = iw_event->local_addr;
1326 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1327 *sin = iw_event->remote_addr;
881a045f
SW		 1328 switch (iw_event->status) {
1329 case 0:
a1b1b61f 1330 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1331 break;
1332 case -ECONNRESET:
1333 case -ECONNREFUSED:
1334 event.event = RDMA_CM_EVENT_REJECTED;
1335 break;
1336 case -ETIMEDOUT:
1337 event.event = RDMA_CM_EVENT_UNREACHABLE;
1338 break;
1339 default:
1340 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1341 break;
1342 }
07ebafba
TT		 1343 break;
1344 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1345 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1346 break;
1347 default:
1348 BUG_ON(1);
1349 }
1350
a1b1b61f
SH		 1351 event.status = iw_event->status;
1352 event.param.conn.private_data = iw_event->private_data;
1353 event.param.conn.private_data_len = iw_event->private_data_len;
1354 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1355 if (ret) {
1356 /* Destroy the CM ID by returning a non-zero value. */
1357 id_priv->cm_id.iw = NULL;
1358 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1359 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1360 rdma_destroy_id(&id_priv->id);
1361 return ret;
1362 }
1363
de910bd9 1364 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1365 return ret;
1366}
1367
1368static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1369 struct iw_cm_event *iw_event)
1370{
1371 struct rdma_cm_id *new_cm_id;
1372 struct rdma_id_private *listen_id, *conn_id;
1373 struct sockaddr_in *sin;
1374 struct net_device *dev = NULL;
a1b1b61f 1375 struct rdma_cm_event event;
07ebafba 1376 int ret;
8d8293cf 1377 struct ib_device_attr attr;
07ebafba
TT		 1378
1379 listen_id = cm_id->context;
de910bd9 1380 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1381 return -ECONNABORTED;
07ebafba
TT		 1382
1383 /* Create a new RDMA id for the new IW CM ID */
1384 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1385 listen_id->id.context,
1386 RDMA_PS_TCP);
10f32065 1387 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1388 ret = -ENOMEM;
1389 goto out;
1390 }
1391 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1392 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba
TT		 1393 conn_id->state = CMA_CONNECT;
1394
1ab35276 1395 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
07ebafba
TT		 1396 if (!dev) {
1397 ret = -EADDRNOTAVAIL;
de910bd9 1398 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1399 rdma_destroy_id(new_cm_id);
1400 goto out;
1401 }
1402 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1403 if (ret) {
de910bd9 1404 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1405 rdma_destroy_id(new_cm_id);
1406 goto out;
1407 }
1408
1409 ret = cma_acquire_dev(conn_id);
1410 if (ret) {
de910bd9 1411 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1412 rdma_destroy_id(new_cm_id);
1413 goto out;
1414 }
1415
1416 conn_id->cm_id.iw = cm_id;
1417 cm_id->context = conn_id;
1418 cm_id->cm_handler = cma_iw_handler;
1419
1420 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1421 *sin = iw_event->local_addr;
1422 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1423 *sin = iw_event->remote_addr;
1424
8d8293cf
SW		 1425 ret = ib_query_device(conn_id->id.device, &attr);
1426 if (ret) {
de910bd9 1427 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1428 rdma_destroy_id(new_cm_id);
1429 goto out;
1430 }
1431
a1b1b61f
SH		 1432 memset(&event, 0, sizeof event);
1433 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1434 event.param.conn.private_data = iw_event->private_data;
1435 event.param.conn.private_data_len = iw_event->private_data_len;
8d8293cf
SW		 1436 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1437 event.param.conn.responder_resources = attr.max_qp_rd_atom;
25ae21a1
SH		 1438
1439 /*
1440 * Protect against the user destroying conn_id from another thread
1441 * until we're done accessing it.
1442 */
1443 atomic_inc(&conn_id->refcount);
a1b1b61f 1444 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1445 if (ret) {
1446 /* User wants to destroy the CM ID */
1447 conn_id->cm_id.iw = NULL;
1448 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1449 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1450 cma_deref_id(conn_id);
07ebafba 1451 rdma_destroy_id(&conn_id->id);
de910bd9 1452 goto out;
07ebafba
TT		 1453 }
1454
de910bd9 1455 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1456 cma_deref_id(conn_id);
de910bd9 1457
07ebafba
TT		 1458out:
1459 if (dev)
1460 dev_put(dev);
de910bd9 1461 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1462 return ret;
1463}
1464
e51060f0
SH		 1465static int cma_ib_listen(struct rdma_id_private *id_priv)
1466{
1467 struct ib_cm_compare_data compare_data;
1468 struct sockaddr *addr;
1469 __be64 svc_id;
1470 int ret;
1471
1472 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1473 id_priv);
1474 if (IS_ERR(id_priv->cm_id.ib))
1475 return PTR_ERR(id_priv->cm_id.ib);
1476
3f446754 1477 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
e51060f0
SH		 1478 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1479 if (cma_any_addr(addr))
1480 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1481 else {
1482 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1483 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1484 }
1485
1486 if (ret) {
1487 ib_destroy_cm_id(id_priv->cm_id.ib);
1488 id_priv->cm_id.ib = NULL;
1489 }
1490
1491 return ret;
1492}
1493
07ebafba
TT		 1494static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1495{
1496 int ret;
1497 struct sockaddr_in *sin;
1498
1499 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1500 iw_conn_req_handler,
1501 id_priv);
1502 if (IS_ERR(id_priv->cm_id.iw))
1503 return PTR_ERR(id_priv->cm_id.iw);
1504
1505 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1506 id_priv->cm_id.iw->local_addr = *sin;
1507
1508 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1509
1510 if (ret) {
1511 iw_destroy_cm_id(id_priv->cm_id.iw);
1512 id_priv->cm_id.iw = NULL;
1513 }
1514
1515 return ret;
1516}
1517
e51060f0
SH		 1518static int cma_listen_handler(struct rdma_cm_id *id,
1519 struct rdma_cm_event *event)
1520{
1521 struct rdma_id_private *id_priv = id->context;
1522
1523 id->context = id_priv->id.context;
1524 id->event_handler = id_priv->id.event_handler;
1525 return id_priv->id.event_handler(id, event);
1526}
1527
1528static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1529 struct cma_device *cma_dev)
1530{
1531 struct rdma_id_private *dev_id_priv;
1532 struct rdma_cm_id *id;
1533 int ret;
1534
1535 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1536 if (IS_ERR(id))
1537 return;
1538
1539 dev_id_priv = container_of(id, struct rdma_id_private, id);
1540
1541 dev_id_priv->state = CMA_ADDR_BOUND;
1542 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
3f446754 1543 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
e51060f0
SH		 1544
1545 cma_attach_to_dev(dev_id_priv, cma_dev);
1546 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1547 atomic_inc(&id_priv->refcount);
1548 dev_id_priv->internal_id = 1;
e51060f0
SH		 1549
1550 ret = rdma_listen(id, id_priv->backlog);
1551 if (ret)
d02d1f53 1552 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1553 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1554}
1555
1556static void cma_listen_on_all(struct rdma_id_private *id_priv)
1557{
1558 struct cma_device *cma_dev;
1559
1560 mutex_lock(&lock);
1561 list_add_tail(&id_priv->list, &listen_any_list);
1562 list_for_each_entry(cma_dev, &dev_list, list)
1563 cma_listen_on_dev(id_priv, cma_dev);
1564 mutex_unlock(&lock);
1565}
1566
e51060f0
SH		 1567int rdma_listen(struct rdma_cm_id *id, int backlog)
1568{
1569 struct rdma_id_private *id_priv;
1570 int ret;
1571
1572 id_priv = container_of(id, struct rdma_id_private, id);
1573 if (id_priv->state == CMA_IDLE) {
d14714df
SH		 1574 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
1575 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
e51060f0
SH		 1576 if (ret)
1577 return ret;
1578 }
1579
1580 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1581 return -EINVAL;
1582
1583 id_priv->backlog = backlog;
1584 if (id->device) {
07ebafba
TT		 1585 switch (rdma_node_get_transport(id->device->node_type)) {
1586 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1587 ret = cma_ib_listen(id_priv);
1588 if (ret)
1589 goto err;
1590 break;
07ebafba
TT		 1591 case RDMA_TRANSPORT_IWARP:
1592 ret = cma_iw_listen(id_priv, backlog);
1593 if (ret)
1594 goto err;
1595 break;
e51060f0
SH		 1596 default:
1597 ret = -ENOSYS;
1598 goto err;
1599 }
1600 } else
1601 cma_listen_on_all(id_priv);
1602
1603 return 0;
1604err:
1605 id_priv->backlog = 0;
1606 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1607 return ret;
1608}
1609EXPORT_SYMBOL(rdma_listen);
1610
a81c994d
SH		 1611void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1612{
1613 struct rdma_id_private *id_priv;
1614
1615 id_priv = container_of(id, struct rdma_id_private, id);
1616 id_priv->tos = (u8) tos;
1617}
1618EXPORT_SYMBOL(rdma_set_service_type);
1619
e51060f0
SH		 1620static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1621 void *context)
1622{
1623 struct cma_work *work = context;
1624 struct rdma_route *route;
1625
1626 route = &work->id->id.route;
1627
1628 if (!status) {
1629 route->num_paths = 1;
1630 *route->path_rec = *path_rec;
1631 } else {
1632 work->old_state = CMA_ROUTE_QUERY;
1633 work->new_state = CMA_ADDR_RESOLVED;
1634 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1635 work->event.status = status;
e51060f0
SH		 1636 }
1637
1638 queue_work(cma_wq, &work->work);
1639}
1640
1641static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1642 struct cma_work *work)
1643{
a81c994d 1644 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1645 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1646 ib_sa_comp_mask comp_mask;
1647 struct sockaddr_in6 *sin6;
e51060f0
SH		 1648
1649 memset(&path_rec, 0, sizeof path_rec);
6f8372b6
SH		 1650 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1651 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
a81c994d 1652 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1653 path_rec.numb_path = 1;
962063e6 1654 path_rec.reversible = 1;
3f446754
RD		 1655 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1656 (struct sockaddr *) &addr->dst_addr);
a81c994d
SH		 1657
1658 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1659 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1660 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1661
3f446754 1662 if (addr->src_addr.ss_family == AF_INET) {
a81c994d
SH		 1663 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1664 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1665 } else {
1666 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1667 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1668 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1669 }
e51060f0 1670
c1a0b23b 1671 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1672 id_priv->id.port_num, &path_rec,
1673 comp_mask, timeout_ms,
1674 GFP_KERNEL, cma_query_handler,
1675 work, &id_priv->query);
e51060f0
SH		 1676
1677 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1678}
1679
c4028958 1680static void cma_work_handler(struct work_struct *_work)
e51060f0 1681{
c4028958 1682 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1683 struct rdma_id_private *id_priv = work->id;
1684 int destroy = 0;
1685
de910bd9 1686 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1687 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1688 goto out;
1689
1690 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1691 cma_exch(id_priv, CMA_DESTROYING);
1692 destroy = 1;
1693 }
1694out:
de910bd9 1695 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1696 cma_deref_id(id_priv);
1697 if (destroy)
1698 rdma_destroy_id(&id_priv->id);
1699 kfree(work);
1700}
1701
dd5bdff8
OG		 1702static void cma_ndev_work_handler(struct work_struct *_work)
1703{
1704 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1705 struct rdma_id_private *id_priv = work->id;
1706 int destroy = 0;
1707
1708 mutex_lock(&id_priv->handler_mutex);
1709 if (id_priv->state == CMA_DESTROYING ||
1710 id_priv->state == CMA_DEVICE_REMOVAL)
1711 goto out;
1712
1713 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1714 cma_exch(id_priv, CMA_DESTROYING);
1715 destroy = 1;
1716 }
1717
1718out:
1719 mutex_unlock(&id_priv->handler_mutex);
1720 cma_deref_id(id_priv);
1721 if (destroy)
1722 rdma_destroy_id(&id_priv->id);
1723 kfree(work);
1724}
1725
e51060f0
SH		 1726static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1727{
1728 struct rdma_route *route = &id_priv->id.route;
1729 struct cma_work *work;
1730 int ret;
1731
1732 work = kzalloc(sizeof *work, GFP_KERNEL);
1733 if (!work)
1734 return -ENOMEM;
1735
1736 work->id = id_priv;
c4028958 1737 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1738 work->old_state = CMA_ROUTE_QUERY;
1739 work->new_state = CMA_ROUTE_RESOLVED;
1740 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1741
1742 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1743 if (!route->path_rec) {
1744 ret = -ENOMEM;
1745 goto err1;
1746 }
1747
1748 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1749 if (ret)
1750 goto err2;
1751
1752 return 0;
1753err2:
1754 kfree(route->path_rec);
1755 route->path_rec = NULL;
1756err1:
1757 kfree(work);
1758 return ret;
1759}
1760
1761int rdma_set_ib_paths(struct rdma_cm_id *id,
1762 struct ib_sa_path_rec *path_rec, int num_paths)
1763{
1764 struct rdma_id_private *id_priv;
1765 int ret;
1766
1767 id_priv = container_of(id, struct rdma_id_private, id);
1768 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1769 return -EINVAL;
1770
9893e742
JL		 1771 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1772 GFP_KERNEL);
e51060f0
SH		 1773 if (!id->route.path_rec) {
1774 ret = -ENOMEM;
1775 goto err;
1776 }
1777
ae2d9293 1778 id->route.num_paths = num_paths;
e51060f0
SH		 1779 return 0;
1780err:
1781 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1782 return ret;
1783}
1784EXPORT_SYMBOL(rdma_set_ib_paths);
1785
07ebafba
TT		 1786static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1787{
1788 struct cma_work *work;
1789
1790 work = kzalloc(sizeof *work, GFP_KERNEL);
1791 if (!work)
1792 return -ENOMEM;
1793
1794 work->id = id_priv;
c4028958 1795 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1796 work->old_state = CMA_ROUTE_QUERY;
1797 work->new_state = CMA_ROUTE_RESOLVED;
1798 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1799 queue_work(cma_wq, &work->work);
1800 return 0;
1801}
1802
3c86aa70
EC		 1803static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1804{
1805 struct rdma_route *route = &id_priv->id.route;
1806 struct rdma_addr *addr = &route->addr;
1807 struct cma_work *work;
1808 int ret;
1809 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1810 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1811 struct net_device *ndev = NULL;
af7bd463 1812 u16 vid;
3c86aa70
EC		 1813
1814 if (src_addr->sin_family != dst_addr->sin_family)
1815 return -EINVAL;
1816
1817 work = kzalloc(sizeof *work, GFP_KERNEL);
1818 if (!work)
1819 return -ENOMEM;
1820
1821 work->id = id_priv;
1822 INIT_WORK(&work->work, cma_work_handler);
1823
1824 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1825 if (!route->path_rec) {
1826 ret = -ENOMEM;
1827 goto err1;
1828 }
1829
1830 route->num_paths = 1;
1831
3c86aa70
EC		 1832 if (addr->dev_addr.bound_dev_if)
1833 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1834 if (!ndev) {
1835 ret = -ENODEV;
1836 goto err2;
1837 }
1838
af7bd463
EC		 1839 vid = rdma_vlan_dev_vlan_id(ndev);
1840
1841 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1842 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1843
1844 route->path_rec->hop_limit = 1;
1845 route->path_rec->reversible = 1;
1846 route->path_rec->pkey = cpu_to_be16(0xffff);
1847 route->path_rec->mtu_selector = IB_SA_EQ;
1848 route->path_rec->sl = id_priv->tos >> 5;
1849
3c86aa70
EC		 1850 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1851 route->path_rec->rate_selector = IB_SA_EQ;
1852 route->path_rec->rate = iboe_get_rate(ndev);
1853 dev_put(ndev);
1854 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1855 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1856 if (!route->path_rec->mtu) {
1857 ret = -EINVAL;
1858 goto err2;
1859 }
1860
1861 work->old_state = CMA_ROUTE_QUERY;
1862 work->new_state = CMA_ROUTE_RESOLVED;
1863 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1864 work->event.status = 0;
1865
1866 queue_work(cma_wq, &work->work);
1867
1868 return 0;
1869
1870err2:
1871 kfree(route->path_rec);
1872 route->path_rec = NULL;
1873err1:
1874 kfree(work);
1875 return ret;
1876}
1877
e51060f0
SH		 1878int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1879{
1880 struct rdma_id_private *id_priv;
1881 int ret;
1882
1883 id_priv = container_of(id, struct rdma_id_private, id);
1884 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1885 return -EINVAL;
1886
1887 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1888 switch (rdma_node_get_transport(id->device->node_type)) {
1889 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 1890 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1891 case IB_LINK_LAYER_INFINIBAND:
1892 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1893 break;
1894 case IB_LINK_LAYER_ETHERNET:
1895 ret = cma_resolve_iboe_route(id_priv);
1896 break;
1897 default:
1898 ret = -ENOSYS;
1899 }
e51060f0 1900 break;
07ebafba
TT		 1901 case RDMA_TRANSPORT_IWARP:
1902 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1903 break;
e51060f0
SH		 1904 default:
1905 ret = -ENOSYS;
1906 break;
1907 }
1908 if (ret)
1909 goto err;
1910
1911 return 0;
1912err:
1913 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1914 cma_deref_id(id_priv);
1915 return ret;
1916}
1917EXPORT_SYMBOL(rdma_resolve_route);
1918
1919static int cma_bind_loopback(struct rdma_id_private *id_priv)
1920{
1921 struct cma_device *cma_dev;
1922 struct ib_port_attr port_attr;
f0ee3404 1923 union ib_gid gid;
e51060f0
SH		 1924 u16 pkey;
1925 int ret;
1926 u8 p;
1927
1928 mutex_lock(&lock);
e82153b5
KK		 1929 if (list_empty(&dev_list)) {
1930 ret = -ENODEV;
1931 goto out;
1932 }
e51060f0
SH		 1933 list_for_each_entry(cma_dev, &dev_list, list)
1934 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1935 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1936 port_attr.state == IB_PORT_ACTIVE)
1937 goto port_found;
1938
e82153b5
KK		 1939 p = 1;
1940 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1941
1942port_found:
f0ee3404 1943 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1944 if (ret)
1945 goto out;
1946
1947 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1948 if (ret)
1949 goto out;
1950
6f8372b6 1951 id_priv->id.route.addr.dev_addr.dev_type =
3c86aa70 1952 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
6f8372b6
SH		 1953 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1954
1955 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1956 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1957 id_priv->id.port_num = p;
1958 cma_attach_to_dev(id_priv, cma_dev);
1959out:
1960 mutex_unlock(&lock);
1961 return ret;
1962}
1963
1964static void addr_handler(int status, struct sockaddr *src_addr,
1965 struct rdma_dev_addr *dev_addr, void *context)
1966{
1967 struct rdma_id_private *id_priv = context;
a1b1b61f 1968 struct rdma_cm_event event;
e51060f0 1969
a1b1b61f 1970 memset(&event, 0, sizeof event);
de910bd9 1971 mutex_lock(&id_priv->handler_mutex);
a396d43a 1972 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED))
61a73c70 1973 goto out;
61a73c70
SH		 1974
1975 if (!status && !id_priv->cma_dev)
e51060f0
SH		 1976 status = cma_acquire_dev(id_priv);
1977
1978 if (status) {
61a73c70 1979 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1980 goto out;
a1b1b61f
SH		 1981 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1982 event.status = status;
e51060f0 1983 } else {
e51060f0
SH		 1984 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1985 ip_addr_size(src_addr));
a1b1b61f 1986 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1987 }
1988
a1b1b61f 1989 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1990 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1991 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1992 cma_deref_id(id_priv);
1993 rdma_destroy_id(&id_priv->id);
1994 return;
1995 }
1996out:
de910bd9 1997 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1998 cma_deref_id(id_priv);
1999}
2000
2001static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2002{
2003 struct cma_work *work;
6f8372b6 2004 struct sockaddr *src, *dst;
f0ee3404 2005 union ib_gid gid;
e51060f0
SH		 2006 int ret;
2007
2008 work = kzalloc(sizeof *work, GFP_KERNEL);
2009 if (!work)
2010 return -ENOMEM;
2011
2012 if (!id_priv->cma_dev) {
2013 ret = cma_bind_loopback(id_priv);
2014 if (ret)
2015 goto err;
2016 }
2017
6f8372b6
SH		 2018 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2019 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2020
6f8372b6
SH		 2021 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2022 if (cma_zero_addr(src)) {
2023 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2024 if ((src->sa_family = dst->sa_family) == AF_INET) {
2025 ((struct sockaddr_in *) src)->sin_addr.s_addr =
2026 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2027 } else {
2028 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
2029 &((struct sockaddr_in6 *) dst)->sin6_addr);
2030 }
e51060f0
SH		 2031 }
2032
2033 work->id = id_priv;
c4028958 2034 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 2035 work->old_state = CMA_ADDR_QUERY;
2036 work->new_state = CMA_ADDR_RESOLVED;
2037 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2038 queue_work(cma_wq, &work->work);
2039 return 0;
2040err:
2041 kfree(work);
2042 return ret;
2043}
2044
2045static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2046 struct sockaddr *dst_addr)
2047{
d14714df
SH		 2048 if (!src_addr || !src_addr->sa_family) {
2049 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2050 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2051 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2052 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2053 }
2054 }
2055 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2056}
2057
2058int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2059 struct sockaddr *dst_addr, int timeout_ms)
2060{
2061 struct rdma_id_private *id_priv;
2062 int ret;
2063
2064 id_priv = container_of(id, struct rdma_id_private, id);
2065 if (id_priv->state == CMA_IDLE) {
2066 ret = cma_bind_addr(id, src_addr, dst_addr);
2067 if (ret)
2068 return ret;
2069 }
2070
2071 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
2072 return -EINVAL;
2073
2074 atomic_inc(&id_priv->refcount);
2075 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2076 if (cma_any_addr(dst_addr))
2077 ret = cma_resolve_loopback(id_priv);
2078 else
3f446754 2079 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 2080 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 2081 timeout_ms, addr_handler, id_priv);
2082 if (ret)
2083 goto err;
2084
2085 return 0;
2086err:
2087 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
2088 cma_deref_id(id_priv);
2089 return ret;
2090}
2091EXPORT_SYMBOL(rdma_resolve_addr);
2092
2093static void cma_bind_port(struct rdma_bind_list *bind_list,
2094 struct rdma_id_private *id_priv)
2095{
2096 struct sockaddr_in *sin;
2097
2098 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2099 sin->sin_port = htons(bind_list->port);
2100 id_priv->bind_list = bind_list;
2101 hlist_add_head(&id_priv->node, &bind_list->owners);
2102}
2103
2104static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2105 unsigned short snum)
2106{
2107 struct rdma_bind_list *bind_list;
aedec080 2108 int port, ret;
e51060f0 2109
cb164b8c 2110 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2111 if (!bind_list)
2112 return -ENOMEM;
2113
aedec080
SH		 2114 do {
2115 ret = idr_get_new_above(ps, bind_list, snum, &port);
2116 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2117
2118 if (ret)
2119 goto err1;
2120
2121 if (port != snum) {
2122 ret = -EADDRNOTAVAIL;
2123 goto err2;
2124 }
2125
2126 bind_list->ps = ps;
2127 bind_list->port = (unsigned short) port;
2128 cma_bind_port(bind_list, id_priv);
2129 return 0;
2130err2:
2131 idr_remove(ps, port);
2132err1:
2133 kfree(bind_list);
2134 return ret;
2135}
e51060f0 2136
aedec080
SH		 2137static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2138{
5d7220e8
TH		 2139 static unsigned int last_used_port;
2140 int low, high, remaining;
2141 unsigned int rover;
e51060f0 2142
227b60f5 2143 inet_get_local_port_range(&low, &high);
5d7220e8
TH		 2144 remaining = (high - low) + 1;
2145 rover = net_random() % remaining + low;
2146retry:
2147 if (last_used_port != rover &&
2148 !idr_find(ps, (unsigned short) rover)) {
2149 int ret = cma_alloc_port(ps, id_priv, rover);
2150 /*
2151 * Remember previously used port number in order to avoid
2152 * re-using same port immediately after it is closed.
2153 */
2154 if (!ret)
2155 last_used_port = rover;
2156 if (ret != -EADDRNOTAVAIL)
2157 return ret;
e51060f0 2158 }
5d7220e8
TH		 2159 if (--remaining) {
2160 rover++;
2161 if ((rover < low) || (rover > high))
2162 rover = low;
2163 goto retry;
2164 }
2165 return -EADDRNOTAVAIL;
e51060f0
SH		 2166}
2167
2168static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2169{
2170 struct rdma_id_private *cur_id;
2171 struct sockaddr_in *sin, *cur_sin;
2172 struct rdma_bind_list *bind_list;
2173 struct hlist_node *node;
2174 unsigned short snum;
2175
2176 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2177 snum = ntohs(sin->sin_port);
2178 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2179 return -EACCES;
2180
2181 bind_list = idr_find(ps, snum);
2182 if (!bind_list)
2183 return cma_alloc_port(ps, id_priv, snum);
2184
2185 /*
2186 * We don't support binding to any address if anyone is bound to
2187 * a specific address on the same port.
2188 */
3f446754 2189 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr))
e51060f0
SH		 2190 return -EADDRNOTAVAIL;
2191
2192 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
3f446754 2193 if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr))
e51060f0 2194 return -EADDRNOTAVAIL;
3cd96564 2195
e51060f0
SH		 2196 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
2197 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2198 return -EADDRINUSE;
2199 }
2200
2201 cma_bind_port(bind_list, id_priv);
2202 return 0;
2203}
2204
2205static int cma_get_port(struct rdma_id_private *id_priv)
2206{
2207 struct idr *ps;
2208 int ret;
2209
2210 switch (id_priv->id.ps) {
2211 case RDMA_PS_SDP:
2212 ps = &sdp_ps;
2213 break;
2214 case RDMA_PS_TCP:
2215 ps = &tcp_ps;
2216 break;
628e5f6d
SH		 2217 case RDMA_PS_UDP:
2218 ps = &udp_ps;
2219 break;
c8f6a362
SH		 2220 case RDMA_PS_IPOIB:
2221 ps = &ipoib_ps;
2222 break;
e51060f0
SH		 2223 default:
2224 return -EPROTONOSUPPORT;
2225 }
2226
2227 mutex_lock(&lock);
3f446754 2228 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2229 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2230 else
2231 ret = cma_use_port(ps, id_priv);
2232 mutex_unlock(&lock);
2233
2234 return ret;
2235}
2236
d14714df
SH		 2237static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2238 struct sockaddr *addr)
2239{
fd4582a3 2240#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
d14714df
SH		 2241 struct sockaddr_in6 *sin6;
2242
2243 if (addr->sa_family != AF_INET6)
2244 return 0;
2245
2246 sin6 = (struct sockaddr_in6 *) addr;
2247 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2248 !sin6->sin6_scope_id)
2249 return -EINVAL;
2250
2251 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2252#endif
2253 return 0;
2254}
2255
e51060f0
SH		 2256int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2257{
2258 struct rdma_id_private *id_priv;
2259 int ret;
2260
1f5175ad 2261 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
e51060f0
SH		 2262 return -EAFNOSUPPORT;
2263
2264 id_priv = container_of(id, struct rdma_id_private, id);
2265 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2266 return -EINVAL;
2267
d14714df
SH		 2268 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2269 if (ret)
2270 goto err1;
2271
8523c048 2272 if (!cma_any_addr(addr)) {
e51060f0 2273 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2274 if (ret)
255d0c14
KK		 2275 goto err1;
2276
255d0c14 2277 ret = cma_acquire_dev(id_priv);
255d0c14
KK		 2278 if (ret)
2279 goto err1;
e51060f0
SH		 2280 }
2281
2282 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2283 ret = cma_get_port(id_priv);
2284 if (ret)
255d0c14 2285 goto err2;
e51060f0
SH		 2286
2287 return 0;
255d0c14 2288err2:
a396d43a
SH		 2289 if (id_priv->cma_dev)
2290 cma_release_dev(id_priv);
255d0c14 2291err1:
e51060f0
SH		 2292 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2293 return ret;
2294}
2295EXPORT_SYMBOL(rdma_bind_addr);
2296
2297static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2298 struct rdma_route *route)
2299{
e51060f0
SH		 2300 struct cma_hdr *cma_hdr;
2301 struct sdp_hh *sdp_hdr;
2302
1f5175ad
AS		 2303 if (route->addr.src_addr.ss_family == AF_INET) {
2304 struct sockaddr_in *src4, *dst4;
2305
2306 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2307 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2308
2309 switch (ps) {
2310 case RDMA_PS_SDP:
2311 sdp_hdr = hdr;
2312 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2313 return -EINVAL;
2314 sdp_set_ip_ver(sdp_hdr, 4);
2315 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2316 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2317 sdp_hdr->port = src4->sin_port;
2318 break;
2319 default:
2320 cma_hdr = hdr;
2321 cma_hdr->cma_version = CMA_VERSION;
2322 cma_set_ip_ver(cma_hdr, 4);
2323 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2324 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2325 cma_hdr->port = src4->sin_port;
2326 break;
2327 }
2328 } else {
2329 struct sockaddr_in6 *src6, *dst6;
2330
2331 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2332 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2333
2334 switch (ps) {
2335 case RDMA_PS_SDP:
2336 sdp_hdr = hdr;
2337 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2338 return -EINVAL;
2339 sdp_set_ip_ver(sdp_hdr, 6);
2340 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2341 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2342 sdp_hdr->port = src6->sin6_port;
2343 break;
2344 default:
2345 cma_hdr = hdr;
2346 cma_hdr->cma_version = CMA_VERSION;
2347 cma_set_ip_ver(cma_hdr, 6);
2348 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2349 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2350 cma_hdr->port = src6->sin6_port;
2351 break;
2352 }
e51060f0
SH		 2353 }
2354 return 0;
2355}
2356
628e5f6d
SH		 2357static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2358 struct ib_cm_event *ib_event)
2359{
2360 struct rdma_id_private *id_priv = cm_id->context;
2361 struct rdma_cm_event event;
2362 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2363 int ret = 0;
2364
de910bd9 2365 if (cma_disable_callback(id_priv, CMA_CONNECT))
8aa08602 2366 return 0;
628e5f6d 2367
8aa08602 2368 memset(&event, 0, sizeof event);
628e5f6d
SH		 2369 switch (ib_event->event) {
2370 case IB_CM_SIDR_REQ_ERROR:
2371 event.event = RDMA_CM_EVENT_UNREACHABLE;
2372 event.status = -ETIMEDOUT;
2373 break;
2374 case IB_CM_SIDR_REP_RECEIVED:
2375 event.param.ud.private_data = ib_event->private_data;
2376 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2377 if (rep->status != IB_SIDR_SUCCESS) {
2378 event.event = RDMA_CM_EVENT_UNREACHABLE;
2379 event.status = ib_event->param.sidr_rep_rcvd.status;
2380 break;
2381 }
d2ca39f2
YE		 2382 ret = cma_set_qkey(id_priv);
2383 if (ret) {
2384 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2385 event.status = -EINVAL;
2386 break;
2387 }
c8f6a362 2388 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2389 event.event = RDMA_CM_EVENT_UNREACHABLE;
2390 event.status = -EINVAL;
2391 break;
2392 }
2393 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2394 id_priv->id.route.path_rec,
2395 &event.param.ud.ah_attr);
2396 event.param.ud.qp_num = rep->qpn;
2397 event.param.ud.qkey = rep->qkey;
2398 event.event = RDMA_CM_EVENT_ESTABLISHED;
2399 event.status = 0;
2400 break;
2401 default:
468f2239 2402 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2403 ib_event->event);
2404 goto out;
2405 }
2406
2407 ret = id_priv->id.event_handler(&id_priv->id, &event);
2408 if (ret) {
2409 /* Destroy the CM ID by returning a non-zero value. */
2410 id_priv->cm_id.ib = NULL;
2411 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2412 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2413 rdma_destroy_id(&id_priv->id);
2414 return ret;
2415 }
2416out:
de910bd9 2417 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2418 return ret;
2419}
2420
2421static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2422 struct rdma_conn_param *conn_param)
2423{
2424 struct ib_cm_sidr_req_param req;
2425 struct rdma_route *route;
2426 int ret;
2427
2428 req.private_data_len = sizeof(struct cma_hdr) +
2429 conn_param->private_data_len;
2430 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2431 if (!req.private_data)
2432 return -ENOMEM;
2433
2434 if (conn_param->private_data && conn_param->private_data_len)
2435 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2436 conn_param->private_data, conn_param->private_data_len);
2437
2438 route = &id_priv->id.route;
2439 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2440 if (ret)
2441 goto out;
2442
2443 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2444 cma_sidr_rep_handler, id_priv);
2445 if (IS_ERR(id_priv->cm_id.ib)) {
2446 ret = PTR_ERR(id_priv->cm_id.ib);
2447 goto out;
2448 }
2449
2450 req.path = route->path_rec;
2451 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2452 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2453 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2454 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2455
2456 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2457 if (ret) {
2458 ib_destroy_cm_id(id_priv->cm_id.ib);
2459 id_priv->cm_id.ib = NULL;
2460 }
2461out:
2462 kfree(req.private_data);
2463 return ret;
2464}
2465
e51060f0
SH		 2466static int cma_connect_ib(struct rdma_id_private *id_priv,
2467 struct rdma_conn_param *conn_param)
2468{
2469 struct ib_cm_req_param req;
2470 struct rdma_route *route;
2471 void *private_data;
2472 int offset, ret;
2473
2474 memset(&req, 0, sizeof req);
2475 offset = cma_user_data_offset(id_priv->id.ps);
2476 req.private_data_len = offset + conn_param->private_data_len;
2477 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2478 if (!private_data)
2479 return -ENOMEM;
2480
2481 if (conn_param->private_data && conn_param->private_data_len)
2482 memcpy(private_data + offset, conn_param->private_data,
2483 conn_param->private_data_len);
2484
2485 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2486 id_priv);
2487 if (IS_ERR(id_priv->cm_id.ib)) {
2488 ret = PTR_ERR(id_priv->cm_id.ib);
2489 goto out;
2490 }
2491
2492 route = &id_priv->id.route;
2493 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2494 if (ret)
2495 goto out;
2496 req.private_data = private_data;
2497
2498 req.primary_path = &route->path_rec[0];
2499 if (route->num_paths == 2)
2500 req.alternate_path = &route->path_rec[1];
2501
2502 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2503 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2504 req.qp_num = id_priv->qp_num;
9b2e9c0c 2505 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2506 req.starting_psn = id_priv->seq_num;
2507 req.responder_resources = conn_param->responder_resources;
2508 req.initiator_depth = conn_param->initiator_depth;
2509 req.flow_control = conn_param->flow_control;
2510 req.retry_count = conn_param->retry_count;
2511 req.rnr_retry_count = conn_param->rnr_retry_count;
2512 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2513 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2514 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2515 req.srq = id_priv->srq ? 1 : 0;
2516
2517 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2518out:
675a027c
KK		 2519 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2520 ib_destroy_cm_id(id_priv->cm_id.ib);
2521 id_priv->cm_id.ib = NULL;
2522 }
2523
e51060f0
SH		 2524 kfree(private_data);
2525 return ret;
2526}
2527
07ebafba
TT		 2528static int cma_connect_iw(struct rdma_id_private *id_priv,
2529 struct rdma_conn_param *conn_param)
2530{
2531 struct iw_cm_id *cm_id;
2532 struct sockaddr_in* sin;
2533 int ret;
2534 struct iw_cm_conn_param iw_param;
2535
2536 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2537 if (IS_ERR(cm_id)) {
2538 ret = PTR_ERR(cm_id);
2539 goto out;
2540 }
2541
2542 id_priv->cm_id.iw = cm_id;
2543
2544 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2545 cm_id->local_addr = *sin;
2546
2547 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2548 cm_id->remote_addr = *sin;
2549
5851bb89 2550 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2551 if (ret)
2552 goto out;
07ebafba
TT		 2553
2554 iw_param.ord = conn_param->initiator_depth;
2555 iw_param.ird = conn_param->responder_resources;
2556 iw_param.private_data = conn_param->private_data;
2557 iw_param.private_data_len = conn_param->private_data_len;
2558 if (id_priv->id.qp)
2559 iw_param.qpn = id_priv->qp_num;
2560 else
2561 iw_param.qpn = conn_param->qp_num;
2562 ret = iw_cm_connect(cm_id, &iw_param);
2563out:
675a027c
KK		 2564 if (ret && !IS_ERR(cm_id)) {
2565 iw_destroy_cm_id(cm_id);
2566 id_priv->cm_id.iw = NULL;
2567 }
07ebafba
TT		 2568 return ret;
2569}
2570
e51060f0
SH		 2571int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2572{
2573 struct rdma_id_private *id_priv;
2574 int ret;
2575
2576 id_priv = container_of(id, struct rdma_id_private, id);
2577 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2578 return -EINVAL;
2579
2580 if (!id->qp) {
2581 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2582 id_priv->srq = conn_param->srq;
2583 }
2584
07ebafba
TT		 2585 switch (rdma_node_get_transport(id->device->node_type)) {
2586 case RDMA_TRANSPORT_IB:
c8f6a362 2587 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2588 ret = cma_resolve_ib_udp(id_priv, conn_param);
2589 else
2590 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2591 break;
07ebafba
TT		 2592 case RDMA_TRANSPORT_IWARP:
2593 ret = cma_connect_iw(id_priv, conn_param);
2594 break;
e51060f0
SH		 2595 default:
2596 ret = -ENOSYS;
2597 break;
2598 }
2599 if (ret)
2600 goto err;
2601
2602 return 0;
2603err:
2604 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2605 return ret;
2606}
2607EXPORT_SYMBOL(rdma_connect);
2608
2609static int cma_accept_ib(struct rdma_id_private *id_priv,
2610 struct rdma_conn_param *conn_param)
2611{
2612 struct ib_cm_rep_param rep;
5851bb89 2613 int ret;
0fe313b0 2614
5851bb89
SH		 2615 ret = cma_modify_qp_rtr(id_priv, conn_param);
2616 if (ret)
2617 goto out;
0fe313b0 2618
5851bb89
SH		 2619 ret = cma_modify_qp_rts(id_priv, conn_param);
2620 if (ret)
2621 goto out;
e51060f0
SH		 2622
2623 memset(&rep, 0, sizeof rep);
2624 rep.qp_num = id_priv->qp_num;
2625 rep.starting_psn = id_priv->seq_num;
2626 rep.private_data = conn_param->private_data;
2627 rep.private_data_len = conn_param->private_data_len;
2628 rep.responder_resources = conn_param->responder_resources;
2629 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2630 rep.failover_accepted = 0;
2631 rep.flow_control = conn_param->flow_control;
2632 rep.rnr_retry_count = conn_param->rnr_retry_count;
2633 rep.srq = id_priv->srq ? 1 : 0;
2634
0fe313b0
SH		 2635 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2636out:
2637 return ret;
e51060f0
SH		 2638}
2639
07ebafba
TT		 2640static int cma_accept_iw(struct rdma_id_private *id_priv,
2641 struct rdma_conn_param *conn_param)
2642{
2643 struct iw_cm_conn_param iw_param;
2644 int ret;
2645
5851bb89 2646 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2647 if (ret)
2648 return ret;
2649
2650 iw_param.ord = conn_param->initiator_depth;
2651 iw_param.ird = conn_param->responder_resources;
2652 iw_param.private_data = conn_param->private_data;
2653 iw_param.private_data_len = conn_param->private_data_len;
2654 if (id_priv->id.qp) {
2655 iw_param.qpn = id_priv->qp_num;
2656 } else
2657 iw_param.qpn = conn_param->qp_num;
2658
2659 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2660}
2661
628e5f6d
SH		 2662static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2663 enum ib_cm_sidr_status status,
2664 const void *private_data, int private_data_len)
2665{
2666 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2667 int ret;
628e5f6d
SH		 2668
2669 memset(&rep, 0, sizeof rep);
2670 rep.status = status;
2671 if (status == IB_SIDR_SUCCESS) {
d2ca39f2
YE		 2672 ret = cma_set_qkey(id_priv);
2673 if (ret)
2674 return ret;
628e5f6d 2675 rep.qp_num = id_priv->qp_num;
c8f6a362 2676 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2677 }
2678 rep.private_data = private_data;
2679 rep.private_data_len = private_data_len;
2680
2681 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2682}
2683
e51060f0
SH		 2684int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2685{
2686 struct rdma_id_private *id_priv;
2687 int ret;
2688
2689 id_priv = container_of(id, struct rdma_id_private, id);
2690 if (!cma_comp(id_priv, CMA_CONNECT))
2691 return -EINVAL;
2692
2693 if (!id->qp && conn_param) {
2694 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2695 id_priv->srq = conn_param->srq;
2696 }
2697
07ebafba
TT		 2698 switch (rdma_node_get_transport(id->device->node_type)) {
2699 case RDMA_TRANSPORT_IB:
c8f6a362 2700 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2701 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2702 conn_param->private_data,
2703 conn_param->private_data_len);
2704 else if (conn_param)
e51060f0
SH		 2705 ret = cma_accept_ib(id_priv, conn_param);
2706 else
2707 ret = cma_rep_recv(id_priv);
2708 break;
07ebafba
TT		 2709 case RDMA_TRANSPORT_IWARP:
2710 ret = cma_accept_iw(id_priv, conn_param);
2711 break;
e51060f0
SH		 2712 default:
2713 ret = -ENOSYS;
2714 break;
2715 }
2716
2717 if (ret)
2718 goto reject;
2719
2720 return 0;
2721reject:
c5483388 2722 cma_modify_qp_err(id_priv);
e51060f0
SH		 2723 rdma_reject(id, NULL, 0);
2724 return ret;
2725}
2726EXPORT_SYMBOL(rdma_accept);
2727
0fe313b0
SH		 2728int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2729{
2730 struct rdma_id_private *id_priv;
2731 int ret;
2732
2733 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2734 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2735 return -EINVAL;
2736
2737 switch (id->device->node_type) {
2738 case RDMA_NODE_IB_CA:
2739 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2740 break;
2741 default:
2742 ret = 0;
2743 break;
2744 }
2745 return ret;
2746}
2747EXPORT_SYMBOL(rdma_notify);
2748
e51060f0
SH		 2749int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2750 u8 private_data_len)
2751{
2752 struct rdma_id_private *id_priv;
2753 int ret;
2754
2755 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2756 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2757 return -EINVAL;
2758
07ebafba
TT		 2759 switch (rdma_node_get_transport(id->device->node_type)) {
2760 case RDMA_TRANSPORT_IB:
c8f6a362 2761 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2762 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2763 private_data, private_data_len);
2764 else
2765 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2766 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2767 0, private_data, private_data_len);
e51060f0 2768 break;
07ebafba
TT		 2769 case RDMA_TRANSPORT_IWARP:
2770 ret = iw_cm_reject(id_priv->cm_id.iw,
2771 private_data, private_data_len);
2772 break;
e51060f0
SH		 2773 default:
2774 ret = -ENOSYS;
2775 break;
2776 }
2777 return ret;
2778}
2779EXPORT_SYMBOL(rdma_reject);
2780
2781int rdma_disconnect(struct rdma_cm_id *id)
2782{
2783 struct rdma_id_private *id_priv;
2784 int ret;
2785
2786 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2787 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2788 return -EINVAL;
2789
07ebafba
TT		 2790 switch (rdma_node_get_transport(id->device->node_type)) {
2791 case RDMA_TRANSPORT_IB:
c5483388 2792 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2793 if (ret)
2794 goto out;
e51060f0
SH		 2795 /* Initiate or respond to a disconnect. */
2796 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2797 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2798 break;
07ebafba
TT		 2799 case RDMA_TRANSPORT_IWARP:
2800 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2801 break;
e51060f0 2802 default:
07ebafba 2803 ret = -EINVAL;
e51060f0
SH		 2804 break;
2805 }
2806out:
2807 return ret;
2808}
2809EXPORT_SYMBOL(rdma_disconnect);
2810
c8f6a362
SH		 2811static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2812{
2813 struct rdma_id_private *id_priv;
2814 struct cma_multicast *mc = multicast->context;
2815 struct rdma_cm_event event;
2816 int ret;
2817
2818 id_priv = mc->id_priv;
de910bd9
OG		 2819 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2820 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
8aa08602 2821 return 0;
c8f6a362 2822
c5483388 2823 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2824 if (!status && id_priv->id.qp)
2825 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2826 multicast->rec.mlid);
c5483388 2827 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2828
2829 memset(&event, 0, sizeof event);
2830 event.status = status;
2831 event.param.ud.private_data = mc->context;
2832 if (!status) {
2833 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2834 ib_init_ah_from_mcmember(id_priv->id.device,
2835 id_priv->id.port_num, &multicast->rec,
2836 &event.param.ud.ah_attr);
2837 event.param.ud.qp_num = 0xFFFFFF;
2838 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2839 } else
2840 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2841
2842 ret = id_priv->id.event_handler(&id_priv->id, &event);
2843 if (ret) {
2844 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2845 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2846 rdma_destroy_id(&id_priv->id);
2847 return 0;
2848 }
8aa08602 2849
de910bd9 2850 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2851 return 0;
2852}
2853
2854static void cma_set_mgid(struct rdma_id_private *id_priv,
2855 struct sockaddr *addr, union ib_gid *mgid)
2856{
2857 unsigned char mc_map[MAX_ADDR_LEN];
2858 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2859 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2860 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2861
2862 if (cma_any_addr(addr)) {
2863 memset(mgid, 0, sizeof *mgid);
2864 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 2865 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 2866 0xFF10A01B)) {
2867 /* IPv6 address is an SA assigned MGID. */
2868 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
e2e62697
JG		 2869 } else if ((addr->sa_family == AF_INET6)) {
2870 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2871 if (id_priv->id.ps == RDMA_PS_UDP)
2872 mc_map[7] = 0x01; /* Use RDMA CM signature */
2873 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 2874 } else {
a9e527e3 2875 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2876 if (id_priv->id.ps == RDMA_PS_UDP)
2877 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2878 *mgid = *(union ib_gid *) (mc_map + 4);
2879 }
2880}
2881
2882static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2883 struct cma_multicast *mc)
2884{
2885 struct ib_sa_mcmember_rec rec;
2886 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2887 ib_sa_comp_mask comp_mask;
2888 int ret;
2889
2890 ib_addr_get_mgid(dev_addr, &rec.mgid);
2891 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2892 &rec.mgid, &rec);
2893 if (ret)
2894 return ret;
2895
3f446754 2896 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 2897 if (id_priv->id.ps == RDMA_PS_UDP)
2898 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
6f8372b6 2899 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 2900 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2901 rec.join_state = 1;
2902
2903 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2904 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2905 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2906 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2907 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2908
84adeee9
YE		 2909 if (id_priv->id.ps == RDMA_PS_IPOIB)
2910 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2911 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2912
c8f6a362
SH		 2913 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2914 id_priv->id.port_num, &rec,
2915 comp_mask, GFP_KERNEL,
2916 cma_ib_mc_handler, mc);
2917 if (IS_ERR(mc->multicast.ib))
2918 return PTR_ERR(mc->multicast.ib);
2919
2920 return 0;
2921}
2922
3c86aa70
EC		 2923static void iboe_mcast_work_handler(struct work_struct *work)
2924{
2925 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
2926 struct cma_multicast *mc = mw->mc;
2927 struct ib_sa_multicast *m = mc->multicast.ib;
2928
2929 mc->multicast.ib->context = mc;
2930 cma_ib_mc_handler(0, m);
2931 kref_put(&mc->mcref, release_mc);
2932 kfree(mw);
2933}
2934
2935static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
2936{
2937 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
2938 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
2939
2940 if (cma_any_addr(addr)) {
2941 memset(mgid, 0, sizeof *mgid);
2942 } else if (addr->sa_family == AF_INET6) {
2943 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2944 } else {
2945 mgid->raw[0] = 0xff;
2946 mgid->raw[1] = 0x0e;
2947 mgid->raw[2] = 0;
2948 mgid->raw[3] = 0;
2949 mgid->raw[4] = 0;
2950 mgid->raw[5] = 0;
2951 mgid->raw[6] = 0;
2952 mgid->raw[7] = 0;
2953 mgid->raw[8] = 0;
2954 mgid->raw[9] = 0;
2955 mgid->raw[10] = 0xff;
2956 mgid->raw[11] = 0xff;
2957 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
2958 }
2959}
2960
2961static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
2962 struct cma_multicast *mc)
2963{
2964 struct iboe_mcast_work *work;
2965 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2966 int err;
2967 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
2968 struct net_device *ndev = NULL;
2969
2970 if (cma_zero_addr((struct sockaddr *)&mc->addr))
2971 return -EINVAL;
2972
2973 work = kzalloc(sizeof *work, GFP_KERNEL);
2974 if (!work)
2975 return -ENOMEM;
2976
2977 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
2978 if (!mc->multicast.ib) {
2979 err = -ENOMEM;
2980 goto out1;
2981 }
2982
2983 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
2984
2985 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
2986 if (id_priv->id.ps == RDMA_PS_UDP)
2987 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2988
2989 if (dev_addr->bound_dev_if)
2990 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
2991 if (!ndev) {
2992 err = -ENODEV;
2993 goto out2;
2994 }
2995 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
2996 mc->multicast.ib->rec.hop_limit = 1;
2997 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
2998 dev_put(ndev);
2999 if (!mc->multicast.ib->rec.mtu) {
3000 err = -EINVAL;
3001 goto out2;
3002 }
3003 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3004 work->id = id_priv;
3005 work->mc = mc;
3006 INIT_WORK(&work->work, iboe_mcast_work_handler);
3007 kref_get(&mc->mcref);
3008 queue_work(cma_wq, &work->work);
3009
3010 return 0;
3011
3012out2:
3013 kfree(mc->multicast.ib);
3014out1:
3015 kfree(work);
3016 return err;
3017}
3018
c8f6a362
SH		 3019int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3020 void *context)
3021{
3022 struct rdma_id_private *id_priv;
3023 struct cma_multicast *mc;
3024 int ret;
3025
3026 id_priv = container_of(id, struct rdma_id_private, id);
3027 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
3028 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
3029 return -EINVAL;
3030
3031 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3032 if (!mc)
3033 return -ENOMEM;
3034
3035 memcpy(&mc->addr, addr, ip_addr_size(addr));
3036 mc->context = context;
3037 mc->id_priv = id_priv;
3038
3039 spin_lock(&id_priv->lock);
3040 list_add(&mc->list, &id_priv->mc_list);
3041 spin_unlock(&id_priv->lock);
3042
3043 switch (rdma_node_get_transport(id->device->node_type)) {
3044 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 3045 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3046 case IB_LINK_LAYER_INFINIBAND:
3047 ret = cma_join_ib_multicast(id_priv, mc);
3048 break;
3049 case IB_LINK_LAYER_ETHERNET:
3050 kref_init(&mc->mcref);
3051 ret = cma_iboe_join_multicast(id_priv, mc);
3052 break;
3053 default:
3054 ret = -EINVAL;
3055 }
c8f6a362
SH		 3056 break;
3057 default:
3058 ret = -ENOSYS;
3059 break;
3060 }
3061
3062 if (ret) {
3063 spin_lock_irq(&id_priv->lock);
3064 list_del(&mc->list);
3065 spin_unlock_irq(&id_priv->lock);
3066 kfree(mc);
3067 }
3068 return ret;
3069}
3070EXPORT_SYMBOL(rdma_join_multicast);
3071
3072void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3073{
3074 struct rdma_id_private *id_priv;
3075 struct cma_multicast *mc;
3076
3077 id_priv = container_of(id, struct rdma_id_private, id);
3078 spin_lock_irq(&id_priv->lock);
3079 list_for_each_entry(mc, &id_priv->mc_list, list) {
3080 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3081 list_del(&mc->list);
3082 spin_unlock_irq(&id_priv->lock);
3083
3084 if (id->qp)
3085 ib_detach_mcast(id->qp,
3086 &mc->multicast.ib->rec.mgid,
3087 mc->multicast.ib->rec.mlid);
3c86aa70
EC		 3088 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3089 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3090 case IB_LINK_LAYER_INFINIBAND:
3091 ib_sa_free_multicast(mc->multicast.ib);
3092 kfree(mc);
3093 break;
3094 case IB_LINK_LAYER_ETHERNET:
3095 kref_put(&mc->mcref, release_mc);
3096 break;
3097 default:
3098 break;
3099 }
3100 }
c8f6a362
SH		 3101 return;
3102 }
3103 }
3104 spin_unlock_irq(&id_priv->lock);
3105}
3106EXPORT_SYMBOL(rdma_leave_multicast);
3107
dd5bdff8
OG		 3108static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3109{
3110 struct rdma_dev_addr *dev_addr;
3111 struct cma_ndev_work *work;
3112
3113 dev_addr = &id_priv->id.route.addr.dev_addr;
3114
6266ed6e 3115 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 3116 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3117 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3118 ndev->name, &id_priv->id);
3119 work = kzalloc(sizeof *work, GFP_KERNEL);
3120 if (!work)
3121 return -ENOMEM;
3122
3123 INIT_WORK(&work->work, cma_ndev_work_handler);
3124 work->id = id_priv;
3125 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3126 atomic_inc(&id_priv->refcount);
3127 queue_work(cma_wq, &work->work);
3128 }
3129
3130 return 0;
3131}
3132
3133static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3134 void *ctx)
3135{
3136 struct net_device *ndev = (struct net_device *)ctx;
3137 struct cma_device *cma_dev;
3138 struct rdma_id_private *id_priv;
3139 int ret = NOTIFY_DONE;
3140
3141 if (dev_net(ndev) != &init_net)
3142 return NOTIFY_DONE;
3143
3144 if (event != NETDEV_BONDING_FAILOVER)
3145 return NOTIFY_DONE;
3146
3147 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3148 return NOTIFY_DONE;
3149
3150 mutex_lock(&lock);
3151 list_for_each_entry(cma_dev, &dev_list, list)
3152 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3153 ret = cma_netdev_change(ndev, id_priv);
3154 if (ret)
3155 goto out;
3156 }
3157
3158out:
3159 mutex_unlock(&lock);
3160 return ret;
3161}
3162
3163static struct notifier_block cma_nb = {
3164 .notifier_call = cma_netdev_callback
3165};
3166
e51060f0
SH		 3167static void cma_add_one(struct ib_device *device)
3168{
3169 struct cma_device *cma_dev;
3170 struct rdma_id_private *id_priv;
3171
3172 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3173 if (!cma_dev)
3174 return;
3175
3176 cma_dev->device = device;
e51060f0
SH		 3177
3178 init_completion(&cma_dev->comp);
3179 atomic_set(&cma_dev->refcount, 1);
3180 INIT_LIST_HEAD(&cma_dev->id_list);
3181 ib_set_client_data(device, &cma_client, cma_dev);
3182
3183 mutex_lock(&lock);
3184 list_add_tail(&cma_dev->list, &dev_list);
3185 list_for_each_entry(id_priv, &listen_any_list, list)
3186 cma_listen_on_dev(id_priv, cma_dev);
3187 mutex_unlock(&lock);
e51060f0
SH		 3188}
3189
3190static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3191{
a1b1b61f 3192 struct rdma_cm_event event;
e51060f0 3193 enum cma_state state;
de910bd9 3194 int ret = 0;
e51060f0
SH		 3195
3196 /* Record that we want to remove the device */
3197 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
3198 if (state == CMA_DESTROYING)
3199 return 0;
3200
3201 cma_cancel_operation(id_priv, state);
de910bd9 3202 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 3203
3204 /* Check for destruction from another callback. */
3205 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
de910bd9 3206 goto out;
e51060f0 3207
a1b1b61f
SH		 3208 memset(&event, 0, sizeof event);
3209 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 3210 ret = id_priv->id.event_handler(&id_priv->id, &event);
3211out:
3212 mutex_unlock(&id_priv->handler_mutex);
3213 return ret;
e51060f0
SH		 3214}
3215
3216static void cma_process_remove(struct cma_device *cma_dev)
3217{
e51060f0
SH		 3218 struct rdma_id_private *id_priv;
3219 int ret;
3220
e51060f0
SH		 3221 mutex_lock(&lock);
3222 while (!list_empty(&cma_dev->id_list)) {
3223 id_priv = list_entry(cma_dev->id_list.next,
3224 struct rdma_id_private, list);
3225
d02d1f53 3226 list_del(&id_priv->listen_list);
94de178a 3227 list_del_init(&id_priv->list);
e51060f0
SH		 3228 atomic_inc(&id_priv->refcount);
3229 mutex_unlock(&lock);
3230
d02d1f53 3231 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 3232 cma_deref_id(id_priv);
3233 if (ret)
3234 rdma_destroy_id(&id_priv->id);
3235
3236 mutex_lock(&lock);
3237 }
3238 mutex_unlock(&lock);
3239
3240 cma_deref_dev(cma_dev);
3241 wait_for_completion(&cma_dev->comp);
3242}
3243
3244static void cma_remove_one(struct ib_device *device)
3245{
3246 struct cma_device *cma_dev;
3247
3248 cma_dev = ib_get_client_data(device, &cma_client);
3249 if (!cma_dev)
3250 return;
3251
3252 mutex_lock(&lock);
3253 list_del(&cma_dev->list);
3254 mutex_unlock(&lock);
3255
3256 cma_process_remove(cma_dev);
3257 kfree(cma_dev);
3258}
3259
716abb1f 3260static int __init cma_init(void)
e51060f0 3261{
5d7220e8 3262 int ret;
227b60f5 3263
c7f743a6 3264 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 3265 if (!cma_wq)
3266 return -ENOMEM;
3267
c1a0b23b 3268 ib_sa_register_client(&sa_client);
7a118df3 3269 rdma_addr_register_client(&addr_client);
dd5bdff8 3270 register_netdevice_notifier(&cma_nb);
c1a0b23b 3271
e51060f0
SH		 3272 ret = ib_register_client(&cma_client);
3273 if (ret)
3274 goto err;
3275 return 0;
3276
3277err:
dd5bdff8 3278 unregister_netdevice_notifier(&cma_nb);
7a118df3 3279 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3280 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3281 destroy_workqueue(cma_wq);
3282 return ret;
3283}
3284
716abb1f 3285static void __exit cma_cleanup(void)
e51060f0
SH		 3286{
3287 ib_unregister_client(&cma_client);
dd5bdff8 3288 unregister_netdevice_notifier(&cma_nb);
7a118df3 3289 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3290 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3291 destroy_workqueue(cma_wq);
3292 idr_destroy(&sdp_ps);
3293 idr_destroy(&tcp_ps);
628e5f6d 3294 idr_destroy(&udp_ps);
c8f6a362 3295 idr_destroy(&ipoib_ps);
e51060f0
SH		 3296}
3297
3298module_init(cma_init);
3299module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)