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RDMA/cma: Fix handling of IPv6 addressing in cma_use_port
[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
43b752da
HS		 715static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
716{
717 if (src->sa_family != dst->sa_family)
718 return -1;
719
720 switch (src->sa_family) {
721 case AF_INET:
722 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
723 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
724 default:
725 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
726 &((struct sockaddr_in6 *) dst)->sin6_addr);
727 }
728}
729
628e5f6d
SH		 730static inline __be16 cma_port(struct sockaddr *addr)
731{
732 if (addr->sa_family == AF_INET)
733 return ((struct sockaddr_in *) addr)->sin_port;
734 else
735 return ((struct sockaddr_in6 *) addr)->sin6_port;
736}
737
e51060f0
SH		 738static inline int cma_any_port(struct sockaddr *addr)
739{
628e5f6d 740 return !cma_port(addr);
e51060f0
SH		 741}
742
743static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
1b90c137 744 u8 *ip_ver, __be16 *port,
e51060f0
SH		 745 union cma_ip_addr **src, union cma_ip_addr **dst)
746{
747 switch (ps) {
748 case RDMA_PS_SDP:
749 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
750 SDP_MAJ_VERSION)
751 return -EINVAL;
752
753 *ip_ver = sdp_get_ip_ver(hdr);
754 *port = ((struct sdp_hh *) hdr)->port;
755 *src = &((struct sdp_hh *) hdr)->src_addr;
756 *dst = &((struct sdp_hh *) hdr)->dst_addr;
757 break;
758 default:
759 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
760 return -EINVAL;
761
762 *ip_ver = cma_get_ip_ver(hdr);
763 *port = ((struct cma_hdr *) hdr)->port;
764 *src = &((struct cma_hdr *) hdr)->src_addr;
765 *dst = &((struct cma_hdr *) hdr)->dst_addr;
766 break;
767 }
768
769 if (*ip_ver != 4 && *ip_ver != 6)
770 return -EINVAL;
771 return 0;
772}
773
774static void cma_save_net_info(struct rdma_addr *addr,
775 struct rdma_addr *listen_addr,
1b90c137 776 u8 ip_ver, __be16 port,
e51060f0
SH		 777 union cma_ip_addr *src, union cma_ip_addr *dst)
778{
779 struct sockaddr_in *listen4, *ip4;
780 struct sockaddr_in6 *listen6, *ip6;
781
782 switch (ip_ver) {
783 case 4:
784 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
785 ip4 = (struct sockaddr_in *) &addr->src_addr;
786 ip4->sin_family = listen4->sin_family;
787 ip4->sin_addr.s_addr = dst->ip4.addr;
788 ip4->sin_port = listen4->sin_port;
789
790 ip4 = (struct sockaddr_in *) &addr->dst_addr;
791 ip4->sin_family = listen4->sin_family;
792 ip4->sin_addr.s_addr = src->ip4.addr;
793 ip4->sin_port = port;
794 break;
795 case 6:
796 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
797 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
798 ip6->sin6_family = listen6->sin6_family;
799 ip6->sin6_addr = dst->ip6;
800 ip6->sin6_port = listen6->sin6_port;
801
802 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
803 ip6->sin6_family = listen6->sin6_family;
804 ip6->sin6_addr = src->ip6;
805 ip6->sin6_port = port;
806 break;
807 default:
808 break;
809 }
810}
811
812static inline int cma_user_data_offset(enum rdma_port_space ps)
813{
814 switch (ps) {
815 case RDMA_PS_SDP:
816 return 0;
817 default:
818 return sizeof(struct cma_hdr);
819 }
820}
821
e51060f0
SH		 822static void cma_cancel_route(struct rdma_id_private *id_priv)
823{
3c86aa70
EC		 824 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
825 case IB_LINK_LAYER_INFINIBAND:
e51060f0
SH		 826 if (id_priv->query)
827 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
828 break;
829 default:
830 break;
831 }
832}
833
e51060f0
SH		 834static void cma_cancel_listens(struct rdma_id_private *id_priv)
835{
836 struct rdma_id_private *dev_id_priv;
837
d02d1f53
SH		 838 /*
839 * Remove from listen_any_list to prevent added devices from spawning
840 * additional listen requests.
841 */
e51060f0
SH		 842 mutex_lock(&lock);
843 list_del(&id_priv->list);
844
845 while (!list_empty(&id_priv->listen_list)) {
846 dev_id_priv = list_entry(id_priv->listen_list.next,
847 struct rdma_id_private, listen_list);
d02d1f53
SH		 848 /* sync with device removal to avoid duplicate destruction */
849 list_del_init(&dev_id_priv->list);
850 list_del(&dev_id_priv->listen_list);
851 mutex_unlock(&lock);
852
853 rdma_destroy_id(&dev_id_priv->id);
854 mutex_lock(&lock);
e51060f0
SH		 855 }
856 mutex_unlock(&lock);
857}
858
859static void cma_cancel_operation(struct rdma_id_private *id_priv,
860 enum cma_state state)
861{
862 switch (state) {
863 case CMA_ADDR_QUERY:
864 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
865 break;
866 case CMA_ROUTE_QUERY:
867 cma_cancel_route(id_priv);
868 break;
869 case CMA_LISTEN:
3f446754
RD		 870 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
871 && !id_priv->cma_dev)
e51060f0
SH		 872 cma_cancel_listens(id_priv);
873 break;
874 default:
875 break;
876 }
877}
878
879static void cma_release_port(struct rdma_id_private *id_priv)
880{
881 struct rdma_bind_list *bind_list = id_priv->bind_list;
882
883 if (!bind_list)
884 return;
885
886 mutex_lock(&lock);
887 hlist_del(&id_priv->node);
888 if (hlist_empty(&bind_list->owners)) {
889 idr_remove(bind_list->ps, bind_list->port);
890 kfree(bind_list);
891 }
892 mutex_unlock(&lock);
893}
894
c8f6a362
SH		 895static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
896{
897 struct cma_multicast *mc;
898
899 while (!list_empty(&id_priv->mc_list)) {
900 mc = container_of(id_priv->mc_list.next,
901 struct cma_multicast, list);
902 list_del(&mc->list);
3c86aa70
EC		 903 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
904 case IB_LINK_LAYER_INFINIBAND:
905 ib_sa_free_multicast(mc->multicast.ib);
906 kfree(mc);
907 break;
908 case IB_LINK_LAYER_ETHERNET:
909 kref_put(&mc->mcref, release_mc);
910 break;
911 default:
912 break;
913 }
c8f6a362
SH		 914 }
915}
916
e51060f0
SH		 917void rdma_destroy_id(struct rdma_cm_id *id)
918{
919 struct rdma_id_private *id_priv;
920 enum cma_state state;
921
922 id_priv = container_of(id, struct rdma_id_private, id);
923 state = cma_exch(id_priv, CMA_DESTROYING);
924 cma_cancel_operation(id_priv, state);
925
a396d43a
SH		 926 /*
927 * Wait for any active callback to finish. New callbacks will find
928 * the id_priv state set to destroying and abort.
929 */
930 mutex_lock(&id_priv->handler_mutex);
931 mutex_unlock(&id_priv->handler_mutex);
932
e51060f0 933 if (id_priv->cma_dev) {
3c86aa70 934 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
07ebafba 935 case RDMA_TRANSPORT_IB:
3cd96564 936 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 937 ib_destroy_cm_id(id_priv->cm_id.ib);
938 break;
07ebafba
TT		 939 case RDMA_TRANSPORT_IWARP:
940 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
941 iw_destroy_cm_id(id_priv->cm_id.iw);
942 break;
e51060f0
SH		 943 default:
944 break;
945 }
c8f6a362 946 cma_leave_mc_groups(id_priv);
a396d43a 947 cma_release_dev(id_priv);
e51060f0
SH		 948 }
949
950 cma_release_port(id_priv);
951 cma_deref_id(id_priv);
952 wait_for_completion(&id_priv->comp);
953
d02d1f53
SH		 954 if (id_priv->internal_id)
955 cma_deref_id(id_priv->id.context);
956
e51060f0
SH		 957 kfree(id_priv->id.route.path_rec);
958 kfree(id_priv);
959}
960EXPORT_SYMBOL(rdma_destroy_id);
961
962static int cma_rep_recv(struct rdma_id_private *id_priv)
963{
964 int ret;
965
5851bb89 966 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 967 if (ret)
968 goto reject;
969
5851bb89 970 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 971 if (ret)
972 goto reject;
973
974 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
975 if (ret)
976 goto reject;
977
978 return 0;
979reject:
c5483388 980 cma_modify_qp_err(id_priv);
e51060f0
SH		 981 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
982 NULL, 0, NULL, 0);
983 return ret;
984}
985
986static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
987{
988 if (id_priv->id.ps == RDMA_PS_SDP &&
989 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
990 SDP_MAJ_VERSION)
991 return -EINVAL;
992
993 return 0;
994}
995
a1b1b61f
SH		 996static void cma_set_rep_event_data(struct rdma_cm_event *event,
997 struct ib_cm_rep_event_param *rep_data,
998 void *private_data)
999{
1000 event->param.conn.private_data = private_data;
1001 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1002 event->param.conn.responder_resources = rep_data->responder_resources;
1003 event->param.conn.initiator_depth = rep_data->initiator_depth;
1004 event->param.conn.flow_control = rep_data->flow_control;
1005 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1006 event->param.conn.srq = rep_data->srq;
1007 event->param.conn.qp_num = rep_data->remote_qpn;
1008}
1009
e51060f0
SH		 1010static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1011{
1012 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 1013 struct rdma_cm_event event;
1014 int ret = 0;
e51060f0 1015
38ca83a5
AV		 1016 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1017 cma_disable_callback(id_priv, CMA_CONNECT)) ||
1018 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1019 cma_disable_callback(id_priv, CMA_DISCONNECT)))
8aa08602 1020 return 0;
e51060f0 1021
a1b1b61f 1022 memset(&event, 0, sizeof event);
e51060f0
SH		 1023 switch (ib_event->event) {
1024 case IB_CM_REQ_ERROR:
1025 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1026 event.event = RDMA_CM_EVENT_UNREACHABLE;
1027 event.status = -ETIMEDOUT;
e51060f0
SH		 1028 break;
1029 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 1030 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1031 if (event.status)
1032 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 1033 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 1034 event.status = cma_rep_recv(id_priv);
1035 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1036 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 1037 } else
a1b1b61f
SH		 1038 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1039 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1040 ib_event->private_data);
e51060f0
SH		 1041 break;
1042 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1043 case IB_CM_USER_ESTABLISHED:
1044 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1045 break;
1046 case IB_CM_DREQ_ERROR:
a1b1b61f 1047 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1048 case IB_CM_DREQ_RECEIVED:
1049 case IB_CM_DREP_RECEIVED:
1050 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
1051 goto out;
a1b1b61f 1052 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1053 break;
1054 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1055 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1056 break;
e51060f0
SH		 1057 case IB_CM_MRA_RECEIVED:
1058 /* ignore event */
1059 goto out;
1060 case IB_CM_REJ_RECEIVED:
c5483388 1061 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1062 event.status = ib_event->param.rej_rcvd.reason;
1063 event.event = RDMA_CM_EVENT_REJECTED;
1064 event.param.conn.private_data = ib_event->private_data;
1065 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1066 break;
1067 default:
468f2239 1068 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1069 ib_event->event);
1070 goto out;
1071 }
1072
a1b1b61f 1073 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1074 if (ret) {
1075 /* Destroy the CM ID by returning a non-zero value. */
1076 id_priv->cm_id.ib = NULL;
1077 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1078 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1079 rdma_destroy_id(&id_priv->id);
1080 return ret;
1081 }
1082out:
de910bd9 1083 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1084 return ret;
1085}
1086
628e5f6d
SH		 1087static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1088 struct ib_cm_event *ib_event)
e51060f0
SH		 1089{
1090 struct rdma_id_private *id_priv;
1091 struct rdma_cm_id *id;
1092 struct rdma_route *rt;
1093 union cma_ip_addr *src, *dst;
1b90c137 1094 __be16 port;
e51060f0 1095 u8 ip_ver;
64c5e613 1096 int ret;
e51060f0 1097
3f168d2b
KK		 1098 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1099 &ip_ver, &port, &src, &dst))
1100 goto err;
1101
e51060f0
SH		 1102 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1103 listen_id->ps);
1104 if (IS_ERR(id))
3f168d2b
KK		 1105 goto err;
1106
1107 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1108 ip_ver, port, src, dst);
e51060f0
SH		 1109
1110 rt = &id->route;
1111 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1112 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1113 GFP_KERNEL);
e51060f0 1114 if (!rt->path_rec)
3f168d2b 1115 goto destroy_id;
e51060f0 1116
e51060f0
SH		 1117 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1118 if (rt->num_paths == 2)
1119 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1120
6f8372b6
SH		 1121 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1122 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1123 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1124 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1125 } else {
1126 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1127 &rt->addr.dev_addr);
1128 if (ret)
1129 goto destroy_id;
1130 }
1131 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0
SH		 1132
1133 id_priv = container_of(id, struct rdma_id_private, id);
1134 id_priv->state = CMA_CONNECT;
1135 return id_priv;
3f168d2b
KK		 1136
1137destroy_id:
e51060f0 1138 rdma_destroy_id(id);
3f168d2b 1139err:
e51060f0
SH		 1140 return NULL;
1141}
1142
628e5f6d
SH		 1143static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1144 struct ib_cm_event *ib_event)
1145{
1146 struct rdma_id_private *id_priv;
1147 struct rdma_cm_id *id;
1148 union cma_ip_addr *src, *dst;
1b90c137 1149 __be16 port;
628e5f6d
SH		 1150 u8 ip_ver;
1151 int ret;
1152
1153 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1154 listen_id->ps);
1155 if (IS_ERR(id))
1156 return NULL;
1157
1158
1159 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1160 &ip_ver, &port, &src, &dst))
1161 goto err;
1162
1163 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1164 ip_ver, port, src, dst);
1165
6f8372b6
SH		 1166 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1167 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1168 &id->route.addr.dev_addr);
1169 if (ret)
1170 goto err;
1171 }
628e5f6d
SH		 1172
1173 id_priv = container_of(id, struct rdma_id_private, id);
1174 id_priv->state = CMA_CONNECT;
1175 return id_priv;
1176err:
1177 rdma_destroy_id(id);
1178 return NULL;
1179}
1180
a1b1b61f
SH		 1181static void cma_set_req_event_data(struct rdma_cm_event *event,
1182 struct ib_cm_req_event_param *req_data,
1183 void *private_data, int offset)
1184{
1185 event->param.conn.private_data = private_data + offset;
1186 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1187 event->param.conn.responder_resources = req_data->responder_resources;
1188 event->param.conn.initiator_depth = req_data->initiator_depth;
1189 event->param.conn.flow_control = req_data->flow_control;
1190 event->param.conn.retry_count = req_data->retry_count;
1191 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1192 event->param.conn.srq = req_data->srq;
1193 event->param.conn.qp_num = req_data->remote_qpn;
1194}
1195
e51060f0
SH		 1196static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1197{
1198 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1199 struct rdma_cm_event event;
e51060f0
SH		 1200 int offset, ret;
1201
1202 listen_id = cm_id->context;
de910bd9 1203 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1204 return -ECONNABORTED;
e51060f0 1205
628e5f6d
SH		 1206 memset(&event, 0, sizeof event);
1207 offset = cma_user_data_offset(listen_id->id.ps);
1208 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
c8f6a362 1209 if (cma_is_ud_ps(listen_id->id.ps)) {
628e5f6d
SH		 1210 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1211 event.param.ud.private_data = ib_event->private_data + offset;
1212 event.param.ud.private_data_len =
1213 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1214 } else {
1215 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1216 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1217 ib_event->private_data, offset);
1218 }
e51060f0
SH		 1219 if (!conn_id) {
1220 ret = -ENOMEM;
1221 goto out;
1222 }
1223
de910bd9 1224 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba 1225 ret = cma_acquire_dev(conn_id);
a1a733f6
KK		 1226 if (ret)
1227 goto release_conn_id;
e51060f0
SH		 1228
1229 conn_id->cm_id.ib = cm_id;
1230 cm_id->context = conn_id;
1231 cm_id->cm_handler = cma_ib_handler;
1232
25ae21a1
SH		 1233 /*
1234 * Protect against the user destroying conn_id from another thread
1235 * until we're done accessing it.
1236 */
1237 atomic_inc(&conn_id->refcount);
a1b1b61f 1238 ret = conn_id->id.event_handler(&conn_id->id, &event);
45d9478d 1239 if (!ret) {
ead595ae
SH		 1240 /*
1241 * Acquire mutex to prevent user executing rdma_destroy_id()
1242 * while we're accessing the cm_id.
1243 */
1244 mutex_lock(&lock);
1245 if (cma_comp(conn_id, CMA_CONNECT) &&
1246 !cma_is_ud_ps(conn_id->id.ps))
1247 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1248 mutex_unlock(&lock);
de910bd9 1249 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1250 cma_deref_id(conn_id);
a1a733f6 1251 goto out;
45d9478d 1252 }
25ae21a1 1253 cma_deref_id(conn_id);
a1a733f6
KK		 1254
1255 /* Destroy the CM ID by returning a non-zero value. */
1256 conn_id->cm_id.ib = NULL;
1257
1258release_conn_id:
1259 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1260 mutex_unlock(&conn_id->handler_mutex);
a1a733f6
KK		 1261 rdma_destroy_id(&conn_id->id);
1262
e51060f0 1263out:
de910bd9 1264 mutex_unlock(&listen_id->handler_mutex);
e51060f0
SH		 1265 return ret;
1266}
1267
1268static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1269{
628e5f6d 1270 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1271}
1272
1273static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1274 struct ib_cm_compare_data *compare)
1275{
1276 struct cma_hdr *cma_data, *cma_mask;
1277 struct sdp_hh *sdp_data, *sdp_mask;
1b90c137 1278 __be32 ip4_addr;
e51060f0
SH		 1279 struct in6_addr ip6_addr;
1280
1281 memset(compare, 0, sizeof *compare);
1282 cma_data = (void *) compare->data;
1283 cma_mask = (void *) compare->mask;
1284 sdp_data = (void *) compare->data;
1285 sdp_mask = (void *) compare->mask;
1286
1287 switch (addr->sa_family) {
1288 case AF_INET:
1289 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1290 if (ps == RDMA_PS_SDP) {
1291 sdp_set_ip_ver(sdp_data, 4);
1292 sdp_set_ip_ver(sdp_mask, 0xF);
1293 sdp_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1294 sdp_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1295 } else {
1296 cma_set_ip_ver(cma_data, 4);
1297 cma_set_ip_ver(cma_mask, 0xF);
1298 cma_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1299 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1300 }
1301 break;
1302 case AF_INET6:
1303 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1304 if (ps == RDMA_PS_SDP) {
1305 sdp_set_ip_ver(sdp_data, 6);
1306 sdp_set_ip_ver(sdp_mask, 0xF);
1307 sdp_data->dst_addr.ip6 = ip6_addr;
1308 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1309 sizeof sdp_mask->dst_addr.ip6);
1310 } else {
1311 cma_set_ip_ver(cma_data, 6);
1312 cma_set_ip_ver(cma_mask, 0xF);
1313 cma_data->dst_addr.ip6 = ip6_addr;
1314 memset(&cma_mask->dst_addr.ip6, 0xFF,
1315 sizeof cma_mask->dst_addr.ip6);
1316 }
1317 break;
1318 default:
1319 break;
1320 }
1321}
1322
07ebafba
TT		 1323static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1324{
1325 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1326 struct rdma_cm_event event;
07ebafba
TT		 1327 struct sockaddr_in *sin;
1328 int ret = 0;
1329
de910bd9 1330 if (cma_disable_callback(id_priv, CMA_CONNECT))
be65f086 1331 return 0;
07ebafba 1332
be65f086 1333 memset(&event, 0, sizeof event);
07ebafba
TT		 1334 switch (iw_event->event) {
1335 case IW_CM_EVENT_CLOSE:
a1b1b61f 1336 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1337 break;
1338 case IW_CM_EVENT_CONNECT_REPLY:
1339 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1340 *sin = iw_event->local_addr;
1341 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1342 *sin = iw_event->remote_addr;
881a045f
SW		 1343 switch (iw_event->status) {
1344 case 0:
a1b1b61f 1345 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1346 break;
1347 case -ECONNRESET:
1348 case -ECONNREFUSED:
1349 event.event = RDMA_CM_EVENT_REJECTED;
1350 break;
1351 case -ETIMEDOUT:
1352 event.event = RDMA_CM_EVENT_UNREACHABLE;
1353 break;
1354 default:
1355 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1356 break;
1357 }
07ebafba
TT		 1358 break;
1359 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1360 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1361 break;
1362 default:
1363 BUG_ON(1);
1364 }
1365
a1b1b61f
SH		 1366 event.status = iw_event->status;
1367 event.param.conn.private_data = iw_event->private_data;
1368 event.param.conn.private_data_len = iw_event->private_data_len;
1369 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1370 if (ret) {
1371 /* Destroy the CM ID by returning a non-zero value. */
1372 id_priv->cm_id.iw = NULL;
1373 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1374 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1375 rdma_destroy_id(&id_priv->id);
1376 return ret;
1377 }
1378
de910bd9 1379 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1380 return ret;
1381}
1382
1383static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1384 struct iw_cm_event *iw_event)
1385{
1386 struct rdma_cm_id *new_cm_id;
1387 struct rdma_id_private *listen_id, *conn_id;
1388 struct sockaddr_in *sin;
1389 struct net_device *dev = NULL;
a1b1b61f 1390 struct rdma_cm_event event;
07ebafba 1391 int ret;
8d8293cf 1392 struct ib_device_attr attr;
07ebafba
TT		 1393
1394 listen_id = cm_id->context;
de910bd9 1395 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1396 return -ECONNABORTED;
07ebafba
TT		 1397
1398 /* Create a new RDMA id for the new IW CM ID */
1399 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1400 listen_id->id.context,
1401 RDMA_PS_TCP);
10f32065 1402 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1403 ret = -ENOMEM;
1404 goto out;
1405 }
1406 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1407 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba
TT		 1408 conn_id->state = CMA_CONNECT;
1409
1ab35276 1410 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
07ebafba
TT		 1411 if (!dev) {
1412 ret = -EADDRNOTAVAIL;
de910bd9 1413 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1414 rdma_destroy_id(new_cm_id);
1415 goto out;
1416 }
1417 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1418 if (ret) {
de910bd9 1419 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1420 rdma_destroy_id(new_cm_id);
1421 goto out;
1422 }
1423
1424 ret = cma_acquire_dev(conn_id);
1425 if (ret) {
de910bd9 1426 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1427 rdma_destroy_id(new_cm_id);
1428 goto out;
1429 }
1430
1431 conn_id->cm_id.iw = cm_id;
1432 cm_id->context = conn_id;
1433 cm_id->cm_handler = cma_iw_handler;
1434
1435 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1436 *sin = iw_event->local_addr;
1437 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1438 *sin = iw_event->remote_addr;
1439
8d8293cf
SW		 1440 ret = ib_query_device(conn_id->id.device, &attr);
1441 if (ret) {
de910bd9 1442 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1443 rdma_destroy_id(new_cm_id);
1444 goto out;
1445 }
1446
a1b1b61f
SH		 1447 memset(&event, 0, sizeof event);
1448 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1449 event.param.conn.private_data = iw_event->private_data;
1450 event.param.conn.private_data_len = iw_event->private_data_len;
8d8293cf
SW		 1451 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1452 event.param.conn.responder_resources = attr.max_qp_rd_atom;
25ae21a1
SH		 1453
1454 /*
1455 * Protect against the user destroying conn_id from another thread
1456 * until we're done accessing it.
1457 */
1458 atomic_inc(&conn_id->refcount);
a1b1b61f 1459 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1460 if (ret) {
1461 /* User wants to destroy the CM ID */
1462 conn_id->cm_id.iw = NULL;
1463 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1464 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1465 cma_deref_id(conn_id);
07ebafba 1466 rdma_destroy_id(&conn_id->id);
de910bd9 1467 goto out;
07ebafba
TT		 1468 }
1469
de910bd9 1470 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1471 cma_deref_id(conn_id);
de910bd9 1472
07ebafba
TT		 1473out:
1474 if (dev)
1475 dev_put(dev);
de910bd9 1476 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1477 return ret;
1478}
1479
e51060f0
SH		 1480static int cma_ib_listen(struct rdma_id_private *id_priv)
1481{
1482 struct ib_cm_compare_data compare_data;
1483 struct sockaddr *addr;
1484 __be64 svc_id;
1485 int ret;
1486
1487 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1488 id_priv);
1489 if (IS_ERR(id_priv->cm_id.ib))
1490 return PTR_ERR(id_priv->cm_id.ib);
1491
3f446754 1492 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
e51060f0
SH		 1493 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1494 if (cma_any_addr(addr))
1495 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1496 else {
1497 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1498 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1499 }
1500
1501 if (ret) {
1502 ib_destroy_cm_id(id_priv->cm_id.ib);
1503 id_priv->cm_id.ib = NULL;
1504 }
1505
1506 return ret;
1507}
1508
07ebafba
TT		 1509static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1510{
1511 int ret;
1512 struct sockaddr_in *sin;
1513
1514 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1515 iw_conn_req_handler,
1516 id_priv);
1517 if (IS_ERR(id_priv->cm_id.iw))
1518 return PTR_ERR(id_priv->cm_id.iw);
1519
1520 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1521 id_priv->cm_id.iw->local_addr = *sin;
1522
1523 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1524
1525 if (ret) {
1526 iw_destroy_cm_id(id_priv->cm_id.iw);
1527 id_priv->cm_id.iw = NULL;
1528 }
1529
1530 return ret;
1531}
1532
e51060f0
SH		 1533static int cma_listen_handler(struct rdma_cm_id *id,
1534 struct rdma_cm_event *event)
1535{
1536 struct rdma_id_private *id_priv = id->context;
1537
1538 id->context = id_priv->id.context;
1539 id->event_handler = id_priv->id.event_handler;
1540 return id_priv->id.event_handler(id, event);
1541}
1542
1543static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1544 struct cma_device *cma_dev)
1545{
1546 struct rdma_id_private *dev_id_priv;
1547 struct rdma_cm_id *id;
1548 int ret;
1549
1550 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1551 if (IS_ERR(id))
1552 return;
1553
1554 dev_id_priv = container_of(id, struct rdma_id_private, id);
1555
1556 dev_id_priv->state = CMA_ADDR_BOUND;
1557 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
3f446754 1558 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
e51060f0
SH		 1559
1560 cma_attach_to_dev(dev_id_priv, cma_dev);
1561 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1562 atomic_inc(&id_priv->refcount);
1563 dev_id_priv->internal_id = 1;
e51060f0
SH		 1564
1565 ret = rdma_listen(id, id_priv->backlog);
1566 if (ret)
d02d1f53 1567 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1568 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1569}
1570
1571static void cma_listen_on_all(struct rdma_id_private *id_priv)
1572{
1573 struct cma_device *cma_dev;
1574
1575 mutex_lock(&lock);
1576 list_add_tail(&id_priv->list, &listen_any_list);
1577 list_for_each_entry(cma_dev, &dev_list, list)
1578 cma_listen_on_dev(id_priv, cma_dev);
1579 mutex_unlock(&lock);
1580}
1581
e51060f0
SH		 1582int rdma_listen(struct rdma_cm_id *id, int backlog)
1583{
1584 struct rdma_id_private *id_priv;
1585 int ret;
1586
1587 id_priv = container_of(id, struct rdma_id_private, id);
1588 if (id_priv->state == CMA_IDLE) {
d14714df
SH		 1589 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
1590 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
e51060f0
SH		 1591 if (ret)
1592 return ret;
1593 }
1594
1595 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1596 return -EINVAL;
1597
1598 id_priv->backlog = backlog;
1599 if (id->device) {
07ebafba
TT		 1600 switch (rdma_node_get_transport(id->device->node_type)) {
1601 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1602 ret = cma_ib_listen(id_priv);
1603 if (ret)
1604 goto err;
1605 break;
07ebafba
TT		 1606 case RDMA_TRANSPORT_IWARP:
1607 ret = cma_iw_listen(id_priv, backlog);
1608 if (ret)
1609 goto err;
1610 break;
e51060f0
SH		 1611 default:
1612 ret = -ENOSYS;
1613 goto err;
1614 }
1615 } else
1616 cma_listen_on_all(id_priv);
1617
1618 return 0;
1619err:
1620 id_priv->backlog = 0;
1621 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1622 return ret;
1623}
1624EXPORT_SYMBOL(rdma_listen);
1625
a81c994d
SH		 1626void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1627{
1628 struct rdma_id_private *id_priv;
1629
1630 id_priv = container_of(id, struct rdma_id_private, id);
1631 id_priv->tos = (u8) tos;
1632}
1633EXPORT_SYMBOL(rdma_set_service_type);
1634
e51060f0
SH		 1635static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1636 void *context)
1637{
1638 struct cma_work *work = context;
1639 struct rdma_route *route;
1640
1641 route = &work->id->id.route;
1642
1643 if (!status) {
1644 route->num_paths = 1;
1645 *route->path_rec = *path_rec;
1646 } else {
1647 work->old_state = CMA_ROUTE_QUERY;
1648 work->new_state = CMA_ADDR_RESOLVED;
1649 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1650 work->event.status = status;
e51060f0
SH		 1651 }
1652
1653 queue_work(cma_wq, &work->work);
1654}
1655
1656static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1657 struct cma_work *work)
1658{
a81c994d 1659 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1660 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1661 ib_sa_comp_mask comp_mask;
1662 struct sockaddr_in6 *sin6;
e51060f0
SH		 1663
1664 memset(&path_rec, 0, sizeof path_rec);
6f8372b6
SH		 1665 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1666 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
a81c994d 1667 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1668 path_rec.numb_path = 1;
962063e6 1669 path_rec.reversible = 1;
3f446754
RD		 1670 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1671 (struct sockaddr *) &addr->dst_addr);
a81c994d
SH		 1672
1673 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1674 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1675 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1676
3f446754 1677 if (addr->src_addr.ss_family == AF_INET) {
a81c994d
SH		 1678 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1679 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1680 } else {
1681 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1682 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1683 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1684 }
e51060f0 1685
c1a0b23b 1686 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1687 id_priv->id.port_num, &path_rec,
1688 comp_mask, timeout_ms,
1689 GFP_KERNEL, cma_query_handler,
1690 work, &id_priv->query);
e51060f0
SH		 1691
1692 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1693}
1694
c4028958 1695static void cma_work_handler(struct work_struct *_work)
e51060f0 1696{
c4028958 1697 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1698 struct rdma_id_private *id_priv = work->id;
1699 int destroy = 0;
1700
de910bd9 1701 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1702 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1703 goto out;
1704
1705 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1706 cma_exch(id_priv, CMA_DESTROYING);
1707 destroy = 1;
1708 }
1709out:
de910bd9 1710 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1711 cma_deref_id(id_priv);
1712 if (destroy)
1713 rdma_destroy_id(&id_priv->id);
1714 kfree(work);
1715}
1716
dd5bdff8
OG		 1717static void cma_ndev_work_handler(struct work_struct *_work)
1718{
1719 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1720 struct rdma_id_private *id_priv = work->id;
1721 int destroy = 0;
1722
1723 mutex_lock(&id_priv->handler_mutex);
1724 if (id_priv->state == CMA_DESTROYING ||
1725 id_priv->state == CMA_DEVICE_REMOVAL)
1726 goto out;
1727
1728 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1729 cma_exch(id_priv, CMA_DESTROYING);
1730 destroy = 1;
1731 }
1732
1733out:
1734 mutex_unlock(&id_priv->handler_mutex);
1735 cma_deref_id(id_priv);
1736 if (destroy)
1737 rdma_destroy_id(&id_priv->id);
1738 kfree(work);
1739}
1740
e51060f0
SH		 1741static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1742{
1743 struct rdma_route *route = &id_priv->id.route;
1744 struct cma_work *work;
1745 int ret;
1746
1747 work = kzalloc(sizeof *work, GFP_KERNEL);
1748 if (!work)
1749 return -ENOMEM;
1750
1751 work->id = id_priv;
c4028958 1752 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1753 work->old_state = CMA_ROUTE_QUERY;
1754 work->new_state = CMA_ROUTE_RESOLVED;
1755 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1756
1757 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1758 if (!route->path_rec) {
1759 ret = -ENOMEM;
1760 goto err1;
1761 }
1762
1763 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1764 if (ret)
1765 goto err2;
1766
1767 return 0;
1768err2:
1769 kfree(route->path_rec);
1770 route->path_rec = NULL;
1771err1:
1772 kfree(work);
1773 return ret;
1774}
1775
1776int rdma_set_ib_paths(struct rdma_cm_id *id,
1777 struct ib_sa_path_rec *path_rec, int num_paths)
1778{
1779 struct rdma_id_private *id_priv;
1780 int ret;
1781
1782 id_priv = container_of(id, struct rdma_id_private, id);
1783 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1784 return -EINVAL;
1785
9893e742
JL		 1786 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1787 GFP_KERNEL);
e51060f0
SH		 1788 if (!id->route.path_rec) {
1789 ret = -ENOMEM;
1790 goto err;
1791 }
1792
ae2d9293 1793 id->route.num_paths = num_paths;
e51060f0
SH		 1794 return 0;
1795err:
1796 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1797 return ret;
1798}
1799EXPORT_SYMBOL(rdma_set_ib_paths);
1800
07ebafba
TT		 1801static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1802{
1803 struct cma_work *work;
1804
1805 work = kzalloc(sizeof *work, GFP_KERNEL);
1806 if (!work)
1807 return -ENOMEM;
1808
1809 work->id = id_priv;
c4028958 1810 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1811 work->old_state = CMA_ROUTE_QUERY;
1812 work->new_state = CMA_ROUTE_RESOLVED;
1813 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1814 queue_work(cma_wq, &work->work);
1815 return 0;
1816}
1817
3c86aa70
EC		 1818static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1819{
1820 struct rdma_route *route = &id_priv->id.route;
1821 struct rdma_addr *addr = &route->addr;
1822 struct cma_work *work;
1823 int ret;
1824 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1825 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1826 struct net_device *ndev = NULL;
af7bd463 1827 u16 vid;
3c86aa70
EC		 1828
1829 if (src_addr->sin_family != dst_addr->sin_family)
1830 return -EINVAL;
1831
1832 work = kzalloc(sizeof *work, GFP_KERNEL);
1833 if (!work)
1834 return -ENOMEM;
1835
1836 work->id = id_priv;
1837 INIT_WORK(&work->work, cma_work_handler);
1838
1839 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1840 if (!route->path_rec) {
1841 ret = -ENOMEM;
1842 goto err1;
1843 }
1844
1845 route->num_paths = 1;
1846
3c86aa70
EC		 1847 if (addr->dev_addr.bound_dev_if)
1848 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1849 if (!ndev) {
1850 ret = -ENODEV;
1851 goto err2;
1852 }
1853
af7bd463
EC		 1854 vid = rdma_vlan_dev_vlan_id(ndev);
1855
1856 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1857 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1858
1859 route->path_rec->hop_limit = 1;
1860 route->path_rec->reversible = 1;
1861 route->path_rec->pkey = cpu_to_be16(0xffff);
1862 route->path_rec->mtu_selector = IB_SA_EQ;
1863 route->path_rec->sl = id_priv->tos >> 5;
1864
3c86aa70
EC		 1865 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1866 route->path_rec->rate_selector = IB_SA_EQ;
1867 route->path_rec->rate = iboe_get_rate(ndev);
1868 dev_put(ndev);
1869 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1870 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1871 if (!route->path_rec->mtu) {
1872 ret = -EINVAL;
1873 goto err2;
1874 }
1875
1876 work->old_state = CMA_ROUTE_QUERY;
1877 work->new_state = CMA_ROUTE_RESOLVED;
1878 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1879 work->event.status = 0;
1880
1881 queue_work(cma_wq, &work->work);
1882
1883 return 0;
1884
1885err2:
1886 kfree(route->path_rec);
1887 route->path_rec = NULL;
1888err1:
1889 kfree(work);
1890 return ret;
1891}
1892
e51060f0
SH		 1893int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1894{
1895 struct rdma_id_private *id_priv;
1896 int ret;
1897
1898 id_priv = container_of(id, struct rdma_id_private, id);
1899 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1900 return -EINVAL;
1901
1902 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1903 switch (rdma_node_get_transport(id->device->node_type)) {
1904 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 1905 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1906 case IB_LINK_LAYER_INFINIBAND:
1907 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1908 break;
1909 case IB_LINK_LAYER_ETHERNET:
1910 ret = cma_resolve_iboe_route(id_priv);
1911 break;
1912 default:
1913 ret = -ENOSYS;
1914 }
e51060f0 1915 break;
07ebafba
TT		 1916 case RDMA_TRANSPORT_IWARP:
1917 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1918 break;
e51060f0
SH		 1919 default:
1920 ret = -ENOSYS;
1921 break;
1922 }
1923 if (ret)
1924 goto err;
1925
1926 return 0;
1927err:
1928 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1929 cma_deref_id(id_priv);
1930 return ret;
1931}
1932EXPORT_SYMBOL(rdma_resolve_route);
1933
1934static int cma_bind_loopback(struct rdma_id_private *id_priv)
1935{
1936 struct cma_device *cma_dev;
1937 struct ib_port_attr port_attr;
f0ee3404 1938 union ib_gid gid;
e51060f0
SH		 1939 u16 pkey;
1940 int ret;
1941 u8 p;
1942
1943 mutex_lock(&lock);
e82153b5
KK		 1944 if (list_empty(&dev_list)) {
1945 ret = -ENODEV;
1946 goto out;
1947 }
e51060f0
SH		 1948 list_for_each_entry(cma_dev, &dev_list, list)
1949 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1950 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1951 port_attr.state == IB_PORT_ACTIVE)
1952 goto port_found;
1953
e82153b5
KK		 1954 p = 1;
1955 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1956
1957port_found:
f0ee3404 1958 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1959 if (ret)
1960 goto out;
1961
1962 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1963 if (ret)
1964 goto out;
1965
6f8372b6 1966 id_priv->id.route.addr.dev_addr.dev_type =
3c86aa70 1967 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
6f8372b6
SH		 1968 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1969
1970 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1971 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1972 id_priv->id.port_num = p;
1973 cma_attach_to_dev(id_priv, cma_dev);
1974out:
1975 mutex_unlock(&lock);
1976 return ret;
1977}
1978
1979static void addr_handler(int status, struct sockaddr *src_addr,
1980 struct rdma_dev_addr *dev_addr, void *context)
1981{
1982 struct rdma_id_private *id_priv = context;
a1b1b61f 1983 struct rdma_cm_event event;
e51060f0 1984
a1b1b61f 1985 memset(&event, 0, sizeof event);
de910bd9 1986 mutex_lock(&id_priv->handler_mutex);
a396d43a 1987 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED))
61a73c70 1988 goto out;
61a73c70
SH		 1989
1990 if (!status && !id_priv->cma_dev)
e51060f0
SH		 1991 status = cma_acquire_dev(id_priv);
1992
1993 if (status) {
61a73c70 1994 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1995 goto out;
a1b1b61f
SH		 1996 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1997 event.status = status;
e51060f0 1998 } else {
e51060f0
SH		 1999 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
2000 ip_addr_size(src_addr));
a1b1b61f 2001 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 2002 }
2003
a1b1b61f 2004 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 2005 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2006 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2007 cma_deref_id(id_priv);
2008 rdma_destroy_id(&id_priv->id);
2009 return;
2010 }
2011out:
de910bd9 2012 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2013 cma_deref_id(id_priv);
2014}
2015
2016static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2017{
2018 struct cma_work *work;
6f8372b6 2019 struct sockaddr *src, *dst;
f0ee3404 2020 union ib_gid gid;
e51060f0
SH		 2021 int ret;
2022
2023 work = kzalloc(sizeof *work, GFP_KERNEL);
2024 if (!work)
2025 return -ENOMEM;
2026
2027 if (!id_priv->cma_dev) {
2028 ret = cma_bind_loopback(id_priv);
2029 if (ret)
2030 goto err;
2031 }
2032
6f8372b6
SH		 2033 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2034 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2035
6f8372b6
SH		 2036 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2037 if (cma_zero_addr(src)) {
2038 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2039 if ((src->sa_family = dst->sa_family) == AF_INET) {
2040 ((struct sockaddr_in *) src)->sin_addr.s_addr =
2041 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2042 } else {
2043 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
2044 &((struct sockaddr_in6 *) dst)->sin6_addr);
2045 }
e51060f0
SH		 2046 }
2047
2048 work->id = id_priv;
c4028958 2049 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 2050 work->old_state = CMA_ADDR_QUERY;
2051 work->new_state = CMA_ADDR_RESOLVED;
2052 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2053 queue_work(cma_wq, &work->work);
2054 return 0;
2055err:
2056 kfree(work);
2057 return ret;
2058}
2059
2060static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2061 struct sockaddr *dst_addr)
2062{
d14714df
SH		 2063 if (!src_addr || !src_addr->sa_family) {
2064 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2065 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2066 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2067 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2068 }
2069 }
2070 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2071}
2072
2073int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2074 struct sockaddr *dst_addr, int timeout_ms)
2075{
2076 struct rdma_id_private *id_priv;
2077 int ret;
2078
2079 id_priv = container_of(id, struct rdma_id_private, id);
2080 if (id_priv->state == CMA_IDLE) {
2081 ret = cma_bind_addr(id, src_addr, dst_addr);
2082 if (ret)
2083 return ret;
2084 }
2085
2086 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
2087 return -EINVAL;
2088
2089 atomic_inc(&id_priv->refcount);
2090 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2091 if (cma_any_addr(dst_addr))
2092 ret = cma_resolve_loopback(id_priv);
2093 else
3f446754 2094 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 2095 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 2096 timeout_ms, addr_handler, id_priv);
2097 if (ret)
2098 goto err;
2099
2100 return 0;
2101err:
2102 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
2103 cma_deref_id(id_priv);
2104 return ret;
2105}
2106EXPORT_SYMBOL(rdma_resolve_addr);
2107
2108static void cma_bind_port(struct rdma_bind_list *bind_list,
2109 struct rdma_id_private *id_priv)
2110{
2111 struct sockaddr_in *sin;
2112
2113 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2114 sin->sin_port = htons(bind_list->port);
2115 id_priv->bind_list = bind_list;
2116 hlist_add_head(&id_priv->node, &bind_list->owners);
2117}
2118
2119static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2120 unsigned short snum)
2121{
2122 struct rdma_bind_list *bind_list;
aedec080 2123 int port, ret;
e51060f0 2124
cb164b8c 2125 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2126 if (!bind_list)
2127 return -ENOMEM;
2128
aedec080
SH		 2129 do {
2130 ret = idr_get_new_above(ps, bind_list, snum, &port);
2131 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2132
2133 if (ret)
2134 goto err1;
2135
2136 if (port != snum) {
2137 ret = -EADDRNOTAVAIL;
2138 goto err2;
2139 }
2140
2141 bind_list->ps = ps;
2142 bind_list->port = (unsigned short) port;
2143 cma_bind_port(bind_list, id_priv);
2144 return 0;
2145err2:
2146 idr_remove(ps, port);
2147err1:
2148 kfree(bind_list);
2149 return ret;
2150}
e51060f0 2151
aedec080
SH		 2152static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2153{
5d7220e8
TH		 2154 static unsigned int last_used_port;
2155 int low, high, remaining;
2156 unsigned int rover;
e51060f0 2157
227b60f5 2158 inet_get_local_port_range(&low, &high);
5d7220e8
TH		 2159 remaining = (high - low) + 1;
2160 rover = net_random() % remaining + low;
2161retry:
2162 if (last_used_port != rover &&
2163 !idr_find(ps, (unsigned short) rover)) {
2164 int ret = cma_alloc_port(ps, id_priv, rover);
2165 /*
2166 * Remember previously used port number in order to avoid
2167 * re-using same port immediately after it is closed.
2168 */
2169 if (!ret)
2170 last_used_port = rover;
2171 if (ret != -EADDRNOTAVAIL)
2172 return ret;
e51060f0 2173 }
5d7220e8
TH		 2174 if (--remaining) {
2175 rover++;
2176 if ((rover < low) || (rover > high))
2177 rover = low;
2178 goto retry;
2179 }
2180 return -EADDRNOTAVAIL;
e51060f0
SH		 2181}
2182
2183static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2184{
2185 struct rdma_id_private *cur_id;
43b752da 2186 struct sockaddr *addr, *cur_addr;
e51060f0
SH		 2187 struct rdma_bind_list *bind_list;
2188 struct hlist_node *node;
2189 unsigned short snum;
2190
43b752da
HS		 2191 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2192 snum = ntohs(cma_port(addr));
e51060f0
SH		 2193 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2194 return -EACCES;
2195
2196 bind_list = idr_find(ps, snum);
2197 if (!bind_list)
2198 return cma_alloc_port(ps, id_priv, snum);
2199
2200 /*
2201 * We don't support binding to any address if anyone is bound to
2202 * a specific address on the same port.
2203 */
43b752da 2204 if (cma_any_addr(addr))
e51060f0
SH		 2205 return -EADDRNOTAVAIL;
2206
2207 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
43b752da
HS		 2208 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2209 if (cma_any_addr(cur_addr))
e51060f0 2210 return -EADDRNOTAVAIL;
3cd96564 2211
43b752da 2212 if (!cma_addr_cmp(addr, cur_addr))
e51060f0
SH		 2213 return -EADDRINUSE;
2214 }
2215
2216 cma_bind_port(bind_list, id_priv);
2217 return 0;
2218}
2219
2220static int cma_get_port(struct rdma_id_private *id_priv)
2221{
2222 struct idr *ps;
2223 int ret;
2224
2225 switch (id_priv->id.ps) {
2226 case RDMA_PS_SDP:
2227 ps = &sdp_ps;
2228 break;
2229 case RDMA_PS_TCP:
2230 ps = &tcp_ps;
2231 break;
628e5f6d
SH		 2232 case RDMA_PS_UDP:
2233 ps = &udp_ps;
2234 break;
c8f6a362
SH		 2235 case RDMA_PS_IPOIB:
2236 ps = &ipoib_ps;
2237 break;
e51060f0
SH		 2238 default:
2239 return -EPROTONOSUPPORT;
2240 }
2241
2242 mutex_lock(&lock);
3f446754 2243 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2244 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2245 else
2246 ret = cma_use_port(ps, id_priv);
2247 mutex_unlock(&lock);
2248
2249 return ret;
2250}
2251
d14714df
SH		 2252static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2253 struct sockaddr *addr)
2254{
fd4582a3 2255#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
d14714df
SH		 2256 struct sockaddr_in6 *sin6;
2257
2258 if (addr->sa_family != AF_INET6)
2259 return 0;
2260
2261 sin6 = (struct sockaddr_in6 *) addr;
2262 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2263 !sin6->sin6_scope_id)
2264 return -EINVAL;
2265
2266 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2267#endif
2268 return 0;
2269}
2270
e51060f0
SH		 2271int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2272{
2273 struct rdma_id_private *id_priv;
2274 int ret;
2275
1f5175ad 2276 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
e51060f0
SH		 2277 return -EAFNOSUPPORT;
2278
2279 id_priv = container_of(id, struct rdma_id_private, id);
2280 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2281 return -EINVAL;
2282
d14714df
SH		 2283 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2284 if (ret)
2285 goto err1;
2286
8523c048 2287 if (!cma_any_addr(addr)) {
e51060f0 2288 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2289 if (ret)
255d0c14
KK		 2290 goto err1;
2291
255d0c14 2292 ret = cma_acquire_dev(id_priv);
255d0c14
KK		 2293 if (ret)
2294 goto err1;
e51060f0
SH		 2295 }
2296
2297 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2298 ret = cma_get_port(id_priv);
2299 if (ret)
255d0c14 2300 goto err2;
e51060f0
SH		 2301
2302 return 0;
255d0c14 2303err2:
a396d43a
SH		 2304 if (id_priv->cma_dev)
2305 cma_release_dev(id_priv);
255d0c14 2306err1:
e51060f0
SH		 2307 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2308 return ret;
2309}
2310EXPORT_SYMBOL(rdma_bind_addr);
2311
2312static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2313 struct rdma_route *route)
2314{
e51060f0
SH		 2315 struct cma_hdr *cma_hdr;
2316 struct sdp_hh *sdp_hdr;
2317
1f5175ad
AS		 2318 if (route->addr.src_addr.ss_family == AF_INET) {
2319 struct sockaddr_in *src4, *dst4;
2320
2321 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2322 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2323
2324 switch (ps) {
2325 case RDMA_PS_SDP:
2326 sdp_hdr = hdr;
2327 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2328 return -EINVAL;
2329 sdp_set_ip_ver(sdp_hdr, 4);
2330 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2331 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2332 sdp_hdr->port = src4->sin_port;
2333 break;
2334 default:
2335 cma_hdr = hdr;
2336 cma_hdr->cma_version = CMA_VERSION;
2337 cma_set_ip_ver(cma_hdr, 4);
2338 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2339 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2340 cma_hdr->port = src4->sin_port;
2341 break;
2342 }
2343 } else {
2344 struct sockaddr_in6 *src6, *dst6;
2345
2346 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2347 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2348
2349 switch (ps) {
2350 case RDMA_PS_SDP:
2351 sdp_hdr = hdr;
2352 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2353 return -EINVAL;
2354 sdp_set_ip_ver(sdp_hdr, 6);
2355 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2356 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2357 sdp_hdr->port = src6->sin6_port;
2358 break;
2359 default:
2360 cma_hdr = hdr;
2361 cma_hdr->cma_version = CMA_VERSION;
2362 cma_set_ip_ver(cma_hdr, 6);
2363 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2364 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2365 cma_hdr->port = src6->sin6_port;
2366 break;
2367 }
e51060f0
SH		 2368 }
2369 return 0;
2370}
2371
628e5f6d
SH		 2372static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2373 struct ib_cm_event *ib_event)
2374{
2375 struct rdma_id_private *id_priv = cm_id->context;
2376 struct rdma_cm_event event;
2377 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2378 int ret = 0;
2379
de910bd9 2380 if (cma_disable_callback(id_priv, CMA_CONNECT))
8aa08602 2381 return 0;
628e5f6d 2382
8aa08602 2383 memset(&event, 0, sizeof event);
628e5f6d
SH		 2384 switch (ib_event->event) {
2385 case IB_CM_SIDR_REQ_ERROR:
2386 event.event = RDMA_CM_EVENT_UNREACHABLE;
2387 event.status = -ETIMEDOUT;
2388 break;
2389 case IB_CM_SIDR_REP_RECEIVED:
2390 event.param.ud.private_data = ib_event->private_data;
2391 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2392 if (rep->status != IB_SIDR_SUCCESS) {
2393 event.event = RDMA_CM_EVENT_UNREACHABLE;
2394 event.status = ib_event->param.sidr_rep_rcvd.status;
2395 break;
2396 }
d2ca39f2
YE		 2397 ret = cma_set_qkey(id_priv);
2398 if (ret) {
2399 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2400 event.status = -EINVAL;
2401 break;
2402 }
c8f6a362 2403 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2404 event.event = RDMA_CM_EVENT_UNREACHABLE;
2405 event.status = -EINVAL;
2406 break;
2407 }
2408 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2409 id_priv->id.route.path_rec,
2410 &event.param.ud.ah_attr);
2411 event.param.ud.qp_num = rep->qpn;
2412 event.param.ud.qkey = rep->qkey;
2413 event.event = RDMA_CM_EVENT_ESTABLISHED;
2414 event.status = 0;
2415 break;
2416 default:
468f2239 2417 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2418 ib_event->event);
2419 goto out;
2420 }
2421
2422 ret = id_priv->id.event_handler(&id_priv->id, &event);
2423 if (ret) {
2424 /* Destroy the CM ID by returning a non-zero value. */
2425 id_priv->cm_id.ib = NULL;
2426 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2427 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2428 rdma_destroy_id(&id_priv->id);
2429 return ret;
2430 }
2431out:
de910bd9 2432 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2433 return ret;
2434}
2435
2436static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2437 struct rdma_conn_param *conn_param)
2438{
2439 struct ib_cm_sidr_req_param req;
2440 struct rdma_route *route;
2441 int ret;
2442
2443 req.private_data_len = sizeof(struct cma_hdr) +
2444 conn_param->private_data_len;
2445 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2446 if (!req.private_data)
2447 return -ENOMEM;
2448
2449 if (conn_param->private_data && conn_param->private_data_len)
2450 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2451 conn_param->private_data, conn_param->private_data_len);
2452
2453 route = &id_priv->id.route;
2454 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2455 if (ret)
2456 goto out;
2457
2458 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2459 cma_sidr_rep_handler, id_priv);
2460 if (IS_ERR(id_priv->cm_id.ib)) {
2461 ret = PTR_ERR(id_priv->cm_id.ib);
2462 goto out;
2463 }
2464
2465 req.path = route->path_rec;
2466 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2467 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2468 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2469 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2470
2471 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2472 if (ret) {
2473 ib_destroy_cm_id(id_priv->cm_id.ib);
2474 id_priv->cm_id.ib = NULL;
2475 }
2476out:
2477 kfree(req.private_data);
2478 return ret;
2479}
2480
e51060f0
SH		 2481static int cma_connect_ib(struct rdma_id_private *id_priv,
2482 struct rdma_conn_param *conn_param)
2483{
2484 struct ib_cm_req_param req;
2485 struct rdma_route *route;
2486 void *private_data;
2487 int offset, ret;
2488
2489 memset(&req, 0, sizeof req);
2490 offset = cma_user_data_offset(id_priv->id.ps);
2491 req.private_data_len = offset + conn_param->private_data_len;
2492 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2493 if (!private_data)
2494 return -ENOMEM;
2495
2496 if (conn_param->private_data && conn_param->private_data_len)
2497 memcpy(private_data + offset, conn_param->private_data,
2498 conn_param->private_data_len);
2499
2500 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2501 id_priv);
2502 if (IS_ERR(id_priv->cm_id.ib)) {
2503 ret = PTR_ERR(id_priv->cm_id.ib);
2504 goto out;
2505 }
2506
2507 route = &id_priv->id.route;
2508 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2509 if (ret)
2510 goto out;
2511 req.private_data = private_data;
2512
2513 req.primary_path = &route->path_rec[0];
2514 if (route->num_paths == 2)
2515 req.alternate_path = &route->path_rec[1];
2516
2517 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2518 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2519 req.qp_num = id_priv->qp_num;
9b2e9c0c 2520 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2521 req.starting_psn = id_priv->seq_num;
2522 req.responder_resources = conn_param->responder_resources;
2523 req.initiator_depth = conn_param->initiator_depth;
2524 req.flow_control = conn_param->flow_control;
2525 req.retry_count = conn_param->retry_count;
2526 req.rnr_retry_count = conn_param->rnr_retry_count;
2527 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2528 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2529 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2530 req.srq = id_priv->srq ? 1 : 0;
2531
2532 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2533out:
675a027c
KK		 2534 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2535 ib_destroy_cm_id(id_priv->cm_id.ib);
2536 id_priv->cm_id.ib = NULL;
2537 }
2538
e51060f0
SH		 2539 kfree(private_data);
2540 return ret;
2541}
2542
07ebafba
TT		 2543static int cma_connect_iw(struct rdma_id_private *id_priv,
2544 struct rdma_conn_param *conn_param)
2545{
2546 struct iw_cm_id *cm_id;
2547 struct sockaddr_in* sin;
2548 int ret;
2549 struct iw_cm_conn_param iw_param;
2550
2551 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2552 if (IS_ERR(cm_id)) {
2553 ret = PTR_ERR(cm_id);
2554 goto out;
2555 }
2556
2557 id_priv->cm_id.iw = cm_id;
2558
2559 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2560 cm_id->local_addr = *sin;
2561
2562 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2563 cm_id->remote_addr = *sin;
2564
5851bb89 2565 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2566 if (ret)
2567 goto out;
07ebafba
TT		 2568
2569 iw_param.ord = conn_param->initiator_depth;
2570 iw_param.ird = conn_param->responder_resources;
2571 iw_param.private_data = conn_param->private_data;
2572 iw_param.private_data_len = conn_param->private_data_len;
2573 if (id_priv->id.qp)
2574 iw_param.qpn = id_priv->qp_num;
2575 else
2576 iw_param.qpn = conn_param->qp_num;
2577 ret = iw_cm_connect(cm_id, &iw_param);
2578out:
675a027c
KK		 2579 if (ret && !IS_ERR(cm_id)) {
2580 iw_destroy_cm_id(cm_id);
2581 id_priv->cm_id.iw = NULL;
2582 }
07ebafba
TT		 2583 return ret;
2584}
2585
e51060f0
SH		 2586int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2587{
2588 struct rdma_id_private *id_priv;
2589 int ret;
2590
2591 id_priv = container_of(id, struct rdma_id_private, id);
2592 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2593 return -EINVAL;
2594
2595 if (!id->qp) {
2596 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2597 id_priv->srq = conn_param->srq;
2598 }
2599
07ebafba
TT		 2600 switch (rdma_node_get_transport(id->device->node_type)) {
2601 case RDMA_TRANSPORT_IB:
c8f6a362 2602 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2603 ret = cma_resolve_ib_udp(id_priv, conn_param);
2604 else
2605 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2606 break;
07ebafba
TT		 2607 case RDMA_TRANSPORT_IWARP:
2608 ret = cma_connect_iw(id_priv, conn_param);
2609 break;
e51060f0
SH		 2610 default:
2611 ret = -ENOSYS;
2612 break;
2613 }
2614 if (ret)
2615 goto err;
2616
2617 return 0;
2618err:
2619 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2620 return ret;
2621}
2622EXPORT_SYMBOL(rdma_connect);
2623
2624static int cma_accept_ib(struct rdma_id_private *id_priv,
2625 struct rdma_conn_param *conn_param)
2626{
2627 struct ib_cm_rep_param rep;
5851bb89 2628 int ret;
0fe313b0 2629
5851bb89
SH		 2630 ret = cma_modify_qp_rtr(id_priv, conn_param);
2631 if (ret)
2632 goto out;
0fe313b0 2633
5851bb89
SH		 2634 ret = cma_modify_qp_rts(id_priv, conn_param);
2635 if (ret)
2636 goto out;
e51060f0
SH		 2637
2638 memset(&rep, 0, sizeof rep);
2639 rep.qp_num = id_priv->qp_num;
2640 rep.starting_psn = id_priv->seq_num;
2641 rep.private_data = conn_param->private_data;
2642 rep.private_data_len = conn_param->private_data_len;
2643 rep.responder_resources = conn_param->responder_resources;
2644 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2645 rep.failover_accepted = 0;
2646 rep.flow_control = conn_param->flow_control;
2647 rep.rnr_retry_count = conn_param->rnr_retry_count;
2648 rep.srq = id_priv->srq ? 1 : 0;
2649
0fe313b0
SH		 2650 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2651out:
2652 return ret;
e51060f0
SH		 2653}
2654
07ebafba
TT		 2655static int cma_accept_iw(struct rdma_id_private *id_priv,
2656 struct rdma_conn_param *conn_param)
2657{
2658 struct iw_cm_conn_param iw_param;
2659 int ret;
2660
5851bb89 2661 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2662 if (ret)
2663 return ret;
2664
2665 iw_param.ord = conn_param->initiator_depth;
2666 iw_param.ird = conn_param->responder_resources;
2667 iw_param.private_data = conn_param->private_data;
2668 iw_param.private_data_len = conn_param->private_data_len;
2669 if (id_priv->id.qp) {
2670 iw_param.qpn = id_priv->qp_num;
2671 } else
2672 iw_param.qpn = conn_param->qp_num;
2673
2674 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2675}
2676
628e5f6d
SH		 2677static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2678 enum ib_cm_sidr_status status,
2679 const void *private_data, int private_data_len)
2680{
2681 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2682 int ret;
628e5f6d
SH		 2683
2684 memset(&rep, 0, sizeof rep);
2685 rep.status = status;
2686 if (status == IB_SIDR_SUCCESS) {
d2ca39f2
YE		 2687 ret = cma_set_qkey(id_priv);
2688 if (ret)
2689 return ret;
628e5f6d 2690 rep.qp_num = id_priv->qp_num;
c8f6a362 2691 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2692 }
2693 rep.private_data = private_data;
2694 rep.private_data_len = private_data_len;
2695
2696 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2697}
2698
e51060f0
SH		 2699int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2700{
2701 struct rdma_id_private *id_priv;
2702 int ret;
2703
2704 id_priv = container_of(id, struct rdma_id_private, id);
2705 if (!cma_comp(id_priv, CMA_CONNECT))
2706 return -EINVAL;
2707
2708 if (!id->qp && conn_param) {
2709 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2710 id_priv->srq = conn_param->srq;
2711 }
2712
07ebafba
TT		 2713 switch (rdma_node_get_transport(id->device->node_type)) {
2714 case RDMA_TRANSPORT_IB:
c8f6a362 2715 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2716 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2717 conn_param->private_data,
2718 conn_param->private_data_len);
2719 else if (conn_param)
e51060f0
SH		 2720 ret = cma_accept_ib(id_priv, conn_param);
2721 else
2722 ret = cma_rep_recv(id_priv);
2723 break;
07ebafba
TT		 2724 case RDMA_TRANSPORT_IWARP:
2725 ret = cma_accept_iw(id_priv, conn_param);
2726 break;
e51060f0
SH		 2727 default:
2728 ret = -ENOSYS;
2729 break;
2730 }
2731
2732 if (ret)
2733 goto reject;
2734
2735 return 0;
2736reject:
c5483388 2737 cma_modify_qp_err(id_priv);
e51060f0
SH		 2738 rdma_reject(id, NULL, 0);
2739 return ret;
2740}
2741EXPORT_SYMBOL(rdma_accept);
2742
0fe313b0
SH		 2743int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2744{
2745 struct rdma_id_private *id_priv;
2746 int ret;
2747
2748 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2749 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2750 return -EINVAL;
2751
2752 switch (id->device->node_type) {
2753 case RDMA_NODE_IB_CA:
2754 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2755 break;
2756 default:
2757 ret = 0;
2758 break;
2759 }
2760 return ret;
2761}
2762EXPORT_SYMBOL(rdma_notify);
2763
e51060f0
SH		 2764int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2765 u8 private_data_len)
2766{
2767 struct rdma_id_private *id_priv;
2768 int ret;
2769
2770 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2771 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2772 return -EINVAL;
2773
07ebafba
TT		 2774 switch (rdma_node_get_transport(id->device->node_type)) {
2775 case RDMA_TRANSPORT_IB:
c8f6a362 2776 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2777 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2778 private_data, private_data_len);
2779 else
2780 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2781 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2782 0, private_data, private_data_len);
e51060f0 2783 break;
07ebafba
TT		 2784 case RDMA_TRANSPORT_IWARP:
2785 ret = iw_cm_reject(id_priv->cm_id.iw,
2786 private_data, private_data_len);
2787 break;
e51060f0
SH		 2788 default:
2789 ret = -ENOSYS;
2790 break;
2791 }
2792 return ret;
2793}
2794EXPORT_SYMBOL(rdma_reject);
2795
2796int rdma_disconnect(struct rdma_cm_id *id)
2797{
2798 struct rdma_id_private *id_priv;
2799 int ret;
2800
2801 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2802 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2803 return -EINVAL;
2804
07ebafba
TT		 2805 switch (rdma_node_get_transport(id->device->node_type)) {
2806 case RDMA_TRANSPORT_IB:
c5483388 2807 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2808 if (ret)
2809 goto out;
e51060f0
SH		 2810 /* Initiate or respond to a disconnect. */
2811 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2812 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2813 break;
07ebafba
TT		 2814 case RDMA_TRANSPORT_IWARP:
2815 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2816 break;
e51060f0 2817 default:
07ebafba 2818 ret = -EINVAL;
e51060f0
SH		 2819 break;
2820 }
2821out:
2822 return ret;
2823}
2824EXPORT_SYMBOL(rdma_disconnect);
2825
c8f6a362
SH		 2826static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2827{
2828 struct rdma_id_private *id_priv;
2829 struct cma_multicast *mc = multicast->context;
2830 struct rdma_cm_event event;
2831 int ret;
2832
2833 id_priv = mc->id_priv;
de910bd9
OG		 2834 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2835 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
8aa08602 2836 return 0;
c8f6a362 2837
c5483388 2838 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2839 if (!status && id_priv->id.qp)
2840 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2841 multicast->rec.mlid);
c5483388 2842 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2843
2844 memset(&event, 0, sizeof event);
2845 event.status = status;
2846 event.param.ud.private_data = mc->context;
2847 if (!status) {
2848 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2849 ib_init_ah_from_mcmember(id_priv->id.device,
2850 id_priv->id.port_num, &multicast->rec,
2851 &event.param.ud.ah_attr);
2852 event.param.ud.qp_num = 0xFFFFFF;
2853 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2854 } else
2855 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2856
2857 ret = id_priv->id.event_handler(&id_priv->id, &event);
2858 if (ret) {
2859 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2860 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2861 rdma_destroy_id(&id_priv->id);
2862 return 0;
2863 }
8aa08602 2864
de910bd9 2865 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2866 return 0;
2867}
2868
2869static void cma_set_mgid(struct rdma_id_private *id_priv,
2870 struct sockaddr *addr, union ib_gid *mgid)
2871{
2872 unsigned char mc_map[MAX_ADDR_LEN];
2873 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2874 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2875 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2876
2877 if (cma_any_addr(addr)) {
2878 memset(mgid, 0, sizeof *mgid);
2879 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 2880 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 2881 0xFF10A01B)) {
2882 /* IPv6 address is an SA assigned MGID. */
2883 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
e2e62697
JG		 2884 } else if ((addr->sa_family == AF_INET6)) {
2885 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2886 if (id_priv->id.ps == RDMA_PS_UDP)
2887 mc_map[7] = 0x01; /* Use RDMA CM signature */
2888 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 2889 } else {
a9e527e3 2890 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2891 if (id_priv->id.ps == RDMA_PS_UDP)
2892 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2893 *mgid = *(union ib_gid *) (mc_map + 4);
2894 }
2895}
2896
2897static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2898 struct cma_multicast *mc)
2899{
2900 struct ib_sa_mcmember_rec rec;
2901 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2902 ib_sa_comp_mask comp_mask;
2903 int ret;
2904
2905 ib_addr_get_mgid(dev_addr, &rec.mgid);
2906 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2907 &rec.mgid, &rec);
2908 if (ret)
2909 return ret;
2910
3f446754 2911 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 2912 if (id_priv->id.ps == RDMA_PS_UDP)
2913 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
6f8372b6 2914 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 2915 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2916 rec.join_state = 1;
2917
2918 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2919 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2920 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2921 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2922 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2923
84adeee9
YE		 2924 if (id_priv->id.ps == RDMA_PS_IPOIB)
2925 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2926 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2927
c8f6a362
SH		 2928 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2929 id_priv->id.port_num, &rec,
2930 comp_mask, GFP_KERNEL,
2931 cma_ib_mc_handler, mc);
2932 if (IS_ERR(mc->multicast.ib))
2933 return PTR_ERR(mc->multicast.ib);
2934
2935 return 0;
2936}
2937
3c86aa70
EC		 2938static void iboe_mcast_work_handler(struct work_struct *work)
2939{
2940 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
2941 struct cma_multicast *mc = mw->mc;
2942 struct ib_sa_multicast *m = mc->multicast.ib;
2943
2944 mc->multicast.ib->context = mc;
2945 cma_ib_mc_handler(0, m);
2946 kref_put(&mc->mcref, release_mc);
2947 kfree(mw);
2948}
2949
2950static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
2951{
2952 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
2953 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
2954
2955 if (cma_any_addr(addr)) {
2956 memset(mgid, 0, sizeof *mgid);
2957 } else if (addr->sa_family == AF_INET6) {
2958 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2959 } else {
2960 mgid->raw[0] = 0xff;
2961 mgid->raw[1] = 0x0e;
2962 mgid->raw[2] = 0;
2963 mgid->raw[3] = 0;
2964 mgid->raw[4] = 0;
2965 mgid->raw[5] = 0;
2966 mgid->raw[6] = 0;
2967 mgid->raw[7] = 0;
2968 mgid->raw[8] = 0;
2969 mgid->raw[9] = 0;
2970 mgid->raw[10] = 0xff;
2971 mgid->raw[11] = 0xff;
2972 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
2973 }
2974}
2975
2976static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
2977 struct cma_multicast *mc)
2978{
2979 struct iboe_mcast_work *work;
2980 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2981 int err;
2982 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
2983 struct net_device *ndev = NULL;
2984
2985 if (cma_zero_addr((struct sockaddr *)&mc->addr))
2986 return -EINVAL;
2987
2988 work = kzalloc(sizeof *work, GFP_KERNEL);
2989 if (!work)
2990 return -ENOMEM;
2991
2992 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
2993 if (!mc->multicast.ib) {
2994 err = -ENOMEM;
2995 goto out1;
2996 }
2997
2998 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
2999
3000 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3001 if (id_priv->id.ps == RDMA_PS_UDP)
3002 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3003
3004 if (dev_addr->bound_dev_if)
3005 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3006 if (!ndev) {
3007 err = -ENODEV;
3008 goto out2;
3009 }
3010 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3011 mc->multicast.ib->rec.hop_limit = 1;
3012 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3013 dev_put(ndev);
3014 if (!mc->multicast.ib->rec.mtu) {
3015 err = -EINVAL;
3016 goto out2;
3017 }
3018 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3019 work->id = id_priv;
3020 work->mc = mc;
3021 INIT_WORK(&work->work, iboe_mcast_work_handler);
3022 kref_get(&mc->mcref);
3023 queue_work(cma_wq, &work->work);
3024
3025 return 0;
3026
3027out2:
3028 kfree(mc->multicast.ib);
3029out1:
3030 kfree(work);
3031 return err;
3032}
3033
c8f6a362
SH		 3034int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3035 void *context)
3036{
3037 struct rdma_id_private *id_priv;
3038 struct cma_multicast *mc;
3039 int ret;
3040
3041 id_priv = container_of(id, struct rdma_id_private, id);
3042 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
3043 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
3044 return -EINVAL;
3045
3046 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3047 if (!mc)
3048 return -ENOMEM;
3049
3050 memcpy(&mc->addr, addr, ip_addr_size(addr));
3051 mc->context = context;
3052 mc->id_priv = id_priv;
3053
3054 spin_lock(&id_priv->lock);
3055 list_add(&mc->list, &id_priv->mc_list);
3056 spin_unlock(&id_priv->lock);
3057
3058 switch (rdma_node_get_transport(id->device->node_type)) {
3059 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 3060 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3061 case IB_LINK_LAYER_INFINIBAND:
3062 ret = cma_join_ib_multicast(id_priv, mc);
3063 break;
3064 case IB_LINK_LAYER_ETHERNET:
3065 kref_init(&mc->mcref);
3066 ret = cma_iboe_join_multicast(id_priv, mc);
3067 break;
3068 default:
3069 ret = -EINVAL;
3070 }
c8f6a362
SH		 3071 break;
3072 default:
3073 ret = -ENOSYS;
3074 break;
3075 }
3076
3077 if (ret) {
3078 spin_lock_irq(&id_priv->lock);
3079 list_del(&mc->list);
3080 spin_unlock_irq(&id_priv->lock);
3081 kfree(mc);
3082 }
3083 return ret;
3084}
3085EXPORT_SYMBOL(rdma_join_multicast);
3086
3087void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3088{
3089 struct rdma_id_private *id_priv;
3090 struct cma_multicast *mc;
3091
3092 id_priv = container_of(id, struct rdma_id_private, id);
3093 spin_lock_irq(&id_priv->lock);
3094 list_for_each_entry(mc, &id_priv->mc_list, list) {
3095 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3096 list_del(&mc->list);
3097 spin_unlock_irq(&id_priv->lock);
3098
3099 if (id->qp)
3100 ib_detach_mcast(id->qp,
3101 &mc->multicast.ib->rec.mgid,
3102 mc->multicast.ib->rec.mlid);
3c86aa70
EC		 3103 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3104 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3105 case IB_LINK_LAYER_INFINIBAND:
3106 ib_sa_free_multicast(mc->multicast.ib);
3107 kfree(mc);
3108 break;
3109 case IB_LINK_LAYER_ETHERNET:
3110 kref_put(&mc->mcref, release_mc);
3111 break;
3112 default:
3113 break;
3114 }
3115 }
c8f6a362
SH		 3116 return;
3117 }
3118 }
3119 spin_unlock_irq(&id_priv->lock);
3120}
3121EXPORT_SYMBOL(rdma_leave_multicast);
3122
dd5bdff8
OG		 3123static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3124{
3125 struct rdma_dev_addr *dev_addr;
3126 struct cma_ndev_work *work;
3127
3128 dev_addr = &id_priv->id.route.addr.dev_addr;
3129
6266ed6e 3130 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 3131 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3132 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3133 ndev->name, &id_priv->id);
3134 work = kzalloc(sizeof *work, GFP_KERNEL);
3135 if (!work)
3136 return -ENOMEM;
3137
3138 INIT_WORK(&work->work, cma_ndev_work_handler);
3139 work->id = id_priv;
3140 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3141 atomic_inc(&id_priv->refcount);
3142 queue_work(cma_wq, &work->work);
3143 }
3144
3145 return 0;
3146}
3147
3148static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3149 void *ctx)
3150{
3151 struct net_device *ndev = (struct net_device *)ctx;
3152 struct cma_device *cma_dev;
3153 struct rdma_id_private *id_priv;
3154 int ret = NOTIFY_DONE;
3155
3156 if (dev_net(ndev) != &init_net)
3157 return NOTIFY_DONE;
3158
3159 if (event != NETDEV_BONDING_FAILOVER)
3160 return NOTIFY_DONE;
3161
3162 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3163 return NOTIFY_DONE;
3164
3165 mutex_lock(&lock);
3166 list_for_each_entry(cma_dev, &dev_list, list)
3167 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3168 ret = cma_netdev_change(ndev, id_priv);
3169 if (ret)
3170 goto out;
3171 }
3172
3173out:
3174 mutex_unlock(&lock);
3175 return ret;
3176}
3177
3178static struct notifier_block cma_nb = {
3179 .notifier_call = cma_netdev_callback
3180};
3181
e51060f0
SH		 3182static void cma_add_one(struct ib_device *device)
3183{
3184 struct cma_device *cma_dev;
3185 struct rdma_id_private *id_priv;
3186
3187 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3188 if (!cma_dev)
3189 return;
3190
3191 cma_dev->device = device;
e51060f0
SH		 3192
3193 init_completion(&cma_dev->comp);
3194 atomic_set(&cma_dev->refcount, 1);
3195 INIT_LIST_HEAD(&cma_dev->id_list);
3196 ib_set_client_data(device, &cma_client, cma_dev);
3197
3198 mutex_lock(&lock);
3199 list_add_tail(&cma_dev->list, &dev_list);
3200 list_for_each_entry(id_priv, &listen_any_list, list)
3201 cma_listen_on_dev(id_priv, cma_dev);
3202 mutex_unlock(&lock);
e51060f0
SH		 3203}
3204
3205static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3206{
a1b1b61f 3207 struct rdma_cm_event event;
e51060f0 3208 enum cma_state state;
de910bd9 3209 int ret = 0;
e51060f0
SH		 3210
3211 /* Record that we want to remove the device */
3212 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
3213 if (state == CMA_DESTROYING)
3214 return 0;
3215
3216 cma_cancel_operation(id_priv, state);
de910bd9 3217 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 3218
3219 /* Check for destruction from another callback. */
3220 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
de910bd9 3221 goto out;
e51060f0 3222
a1b1b61f
SH		 3223 memset(&event, 0, sizeof event);
3224 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 3225 ret = id_priv->id.event_handler(&id_priv->id, &event);
3226out:
3227 mutex_unlock(&id_priv->handler_mutex);
3228 return ret;
e51060f0
SH		 3229}
3230
3231static void cma_process_remove(struct cma_device *cma_dev)
3232{
e51060f0
SH		 3233 struct rdma_id_private *id_priv;
3234 int ret;
3235
e51060f0
SH		 3236 mutex_lock(&lock);
3237 while (!list_empty(&cma_dev->id_list)) {
3238 id_priv = list_entry(cma_dev->id_list.next,
3239 struct rdma_id_private, list);
3240
d02d1f53 3241 list_del(&id_priv->listen_list);
94de178a 3242 list_del_init(&id_priv->list);
e51060f0
SH		 3243 atomic_inc(&id_priv->refcount);
3244 mutex_unlock(&lock);
3245
d02d1f53 3246 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 3247 cma_deref_id(id_priv);
3248 if (ret)
3249 rdma_destroy_id(&id_priv->id);
3250
3251 mutex_lock(&lock);
3252 }
3253 mutex_unlock(&lock);
3254
3255 cma_deref_dev(cma_dev);
3256 wait_for_completion(&cma_dev->comp);
3257}
3258
3259static void cma_remove_one(struct ib_device *device)
3260{
3261 struct cma_device *cma_dev;
3262
3263 cma_dev = ib_get_client_data(device, &cma_client);
3264 if (!cma_dev)
3265 return;
3266
3267 mutex_lock(&lock);
3268 list_del(&cma_dev->list);
3269 mutex_unlock(&lock);
3270
3271 cma_process_remove(cma_dev);
3272 kfree(cma_dev);
3273}
3274
716abb1f 3275static int __init cma_init(void)
e51060f0 3276{
5d7220e8 3277 int ret;
227b60f5 3278
c7f743a6 3279 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 3280 if (!cma_wq)
3281 return -ENOMEM;
3282
c1a0b23b 3283 ib_sa_register_client(&sa_client);
7a118df3 3284 rdma_addr_register_client(&addr_client);
dd5bdff8 3285 register_netdevice_notifier(&cma_nb);
c1a0b23b 3286
e51060f0
SH		 3287 ret = ib_register_client(&cma_client);
3288 if (ret)
3289 goto err;
3290 return 0;
3291
3292err:
dd5bdff8 3293 unregister_netdevice_notifier(&cma_nb);
7a118df3 3294 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3295 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3296 destroy_workqueue(cma_wq);
3297 return ret;
3298}
3299
716abb1f 3300static void __exit cma_cleanup(void)
e51060f0
SH		 3301{
3302 ib_unregister_client(&cma_client);
dd5bdff8 3303 unregister_netdevice_notifier(&cma_nb);
7a118df3 3304 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3305 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3306 destroy_workqueue(cma_wq);
3307 idr_destroy(&sdp_ps);
3308 idr_destroy(&tcp_ps);
628e5f6d 3309 idr_destroy(&udp_ps);
c8f6a362 3310 idr_destroy(&ipoib_ps);
e51060f0
SH		 3311}
3312
3313module_init(cma_init);
3314module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)