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Merge remote-tracking branch 'asoc/topic/arizona' into asoc-next
[deliverable/linux.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>
e4dd23d7 44#include <linux/module.h>
366cddb4 45#include <net/route.h>
e51060f0
SH		 46
47#include <net/tcp.h>
1f5175ad 48#include <net/ipv6.h>
e51060f0
SH		 49
50#include <rdma/rdma_cm.h>
51#include <rdma/rdma_cm_ib.h>
753f618a 52#include <rdma/rdma_netlink.h>
2e2d190c 53#include <rdma/ib.h>
e51060f0
SH		 54#include <rdma/ib_cache.h>
55#include <rdma/ib_cm.h>
56#include <rdma/ib_sa.h>
07ebafba 57#include <rdma/iw_cm.h>
e51060f0
SH		 58
59MODULE_AUTHOR("Sean Hefty");
60MODULE_DESCRIPTION("Generic RDMA CM Agent");
61MODULE_LICENSE("Dual BSD/GPL");
62
63#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 64#define CMA_MAX_CM_RETRIES 15
dcb3f974 65#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 66#define CMA_IBOE_PACKET_LIFETIME 18
e51060f0
SH		 67
68static void cma_add_one(struct ib_device *device);
69static void cma_remove_one(struct ib_device *device);
70
71static struct ib_client cma_client = {
72 .name = "cma",
73 .add = cma_add_one,
74 .remove = cma_remove_one
75};
76
c1a0b23b 77static struct ib_sa_client sa_client;
7a118df3 78static struct rdma_addr_client addr_client;
e51060f0
SH		 79static LIST_HEAD(dev_list);
80static LIST_HEAD(listen_any_list);
81static DEFINE_MUTEX(lock);
82static struct workqueue_struct *cma_wq;
e51060f0 83static DEFINE_IDR(tcp_ps);
628e5f6d 84static DEFINE_IDR(udp_ps);
c8f6a362 85static DEFINE_IDR(ipoib_ps);
2d2e9415 86static DEFINE_IDR(ib_ps);
e51060f0
SH		 87
88struct cma_device {
89 struct list_head list;
90 struct ib_device *device;
e51060f0
SH		 91 struct completion comp;
92 atomic_t refcount;
93 struct list_head id_list;
94};
95
e51060f0
SH		 96struct rdma_bind_list {
97 struct idr *ps;
98 struct hlist_head owners;
99 unsigned short port;
100};
101
68602120
SH		 102enum {
103 CMA_OPTION_AFONLY,
104};
105
e51060f0
SH		 106/*
107 * Device removal can occur at anytime, so we need extra handling to
108 * serialize notifying the user of device removal with other callbacks.
109 * We do this by disabling removal notification while a callback is in process,
110 * and reporting it after the callback completes.
111 */
112struct rdma_id_private {
113 struct rdma_cm_id id;
114
115 struct rdma_bind_list *bind_list;
116 struct hlist_node node;
d02d1f53
SH		 117 struct list_head list; /* listen_any_list or cma_device.list */
118 struct list_head listen_list; /* per device listens */
e51060f0 119 struct cma_device *cma_dev;
c8f6a362 120 struct list_head mc_list;
e51060f0 121
d02d1f53 122 int internal_id;
550e5ca7 123 enum rdma_cm_state state;
e51060f0 124 spinlock_t lock;
c5483388
SH		 125 struct mutex qp_mutex;
126
e51060f0
SH		 127 struct completion comp;
128 atomic_t refcount;
de910bd9 129 struct mutex handler_mutex;
e51060f0
SH		 130
131 int backlog;
132 int timeout_ms;
133 struct ib_sa_query *query;
134 int query_id;
135 union {
136 struct ib_cm_id *ib;
07ebafba 137 struct iw_cm_id *iw;
e51060f0
SH		 138 } cm_id;
139
140 u32 seq_num;
c8f6a362 141 u32 qkey;
e51060f0 142 u32 qp_num;
83e9502d 143 pid_t owner;
68602120 144 u32 options;
e51060f0 145 u8 srq;
a81c994d 146 u8 tos;
a9bb7912 147 u8 reuseaddr;
5b0ec991 148 u8 afonly;
e51060f0
SH		 149};
150
c8f6a362
SH		 151struct cma_multicast {
152 struct rdma_id_private *id_priv;
153 union {
154 struct ib_sa_multicast *ib;
155 } multicast;
156 struct list_head list;
157 void *context;
3f446754 158 struct sockaddr_storage addr;
3c86aa70 159 struct kref mcref;
c8f6a362
SH		 160};
161
e51060f0
SH		 162struct cma_work {
163 struct work_struct work;
164 struct rdma_id_private *id;
550e5ca7
NM		 165 enum rdma_cm_state old_state;
166 enum rdma_cm_state new_state;
e51060f0
SH		 167 struct rdma_cm_event event;
168};
169
dd5bdff8
OG		 170struct cma_ndev_work {
171 struct work_struct work;
172 struct rdma_id_private *id;
173 struct rdma_cm_event event;
174};
175
3c86aa70
EC		 176struct iboe_mcast_work {
177 struct work_struct work;
178 struct rdma_id_private *id;
179 struct cma_multicast *mc;
180};
181
e51060f0
SH		 182union cma_ip_addr {
183 struct in6_addr ip6;
184 struct {
1b90c137
AV		 185 __be32 pad[3];
186 __be32 addr;
e51060f0
SH		 187 } ip4;
188};
189
190struct cma_hdr {
191 u8 cma_version;
192 u8 ip_version; /* IP version: 7:4 */
1b90c137 193 __be16 port;
e51060f0
SH		 194 union cma_ip_addr src_addr;
195 union cma_ip_addr dst_addr;
196};
197
e51060f0 198#define CMA_VERSION 0x00
e51060f0 199
550e5ca7 200static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
e51060f0
SH		 201{
202 unsigned long flags;
203 int ret;
204
205 spin_lock_irqsave(&id_priv->lock, flags);
206 ret = (id_priv->state == comp);
207 spin_unlock_irqrestore(&id_priv->lock, flags);
208 return ret;
209}
210
211static int cma_comp_exch(struct rdma_id_private *id_priv,
550e5ca7 212 enum rdma_cm_state comp, enum rdma_cm_state exch)
e51060f0
SH		 213{
214 unsigned long flags;
215 int ret;
216
217 spin_lock_irqsave(&id_priv->lock, flags);
218 if ((ret = (id_priv->state == comp)))
219 id_priv->state = exch;
220 spin_unlock_irqrestore(&id_priv->lock, flags);
221 return ret;
222}
223
550e5ca7
NM		 224static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
225 enum rdma_cm_state exch)
e51060f0
SH		 226{
227 unsigned long flags;
550e5ca7 228 enum rdma_cm_state old;
e51060f0
SH		 229
230 spin_lock_irqsave(&id_priv->lock, flags);
231 old = id_priv->state;
232 id_priv->state = exch;
233 spin_unlock_irqrestore(&id_priv->lock, flags);
234 return old;
235}
236
237static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
238{
239 return hdr->ip_version >> 4;
240}
241
242static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
243{
244 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
245}
246
e51060f0
SH		 247static void cma_attach_to_dev(struct rdma_id_private *id_priv,
248 struct cma_device *cma_dev)
249{
250 atomic_inc(&cma_dev->refcount);
251 id_priv->cma_dev = cma_dev;
252 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 253 id_priv->id.route.addr.dev_addr.transport =
254 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0
SH		 255 list_add_tail(&id_priv->list, &cma_dev->id_list);
256}
257
258static inline void cma_deref_dev(struct cma_device *cma_dev)
259{
260 if (atomic_dec_and_test(&cma_dev->refcount))
261 complete(&cma_dev->comp);
262}
263
3c86aa70
EC		 264static inline void release_mc(struct kref *kref)
265{
266 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
267
268 kfree(mc->multicast.ib);
269 kfree(mc);
270}
271
a396d43a 272static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 273{
a396d43a 274 mutex_lock(&lock);
e51060f0
SH		 275 list_del(&id_priv->list);
276 cma_deref_dev(id_priv->cma_dev);
277 id_priv->cma_dev = NULL;
a396d43a 278 mutex_unlock(&lock);
e51060f0
SH		 279}
280
f4753834
SH		 281static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
282{
283 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
284}
285
286static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
287{
288 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
289}
290
291static inline unsigned short cma_family(struct rdma_id_private *id_priv)
292{
293 return id_priv->id.route.addr.src_addr.ss_family;
294}
295
5c438135 296static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
c8f6a362
SH		 297{
298 struct ib_sa_mcmember_rec rec;
299 int ret = 0;
300
5c438135
SH		 301 if (id_priv->qkey) {
302 if (qkey && id_priv->qkey != qkey)
303 return -EINVAL;
d2ca39f2 304 return 0;
5c438135
SH		 305 }
306
307 if (qkey) {
308 id_priv->qkey = qkey;
309 return 0;
310 }
d2ca39f2
YE		 311
312 switch (id_priv->id.ps) {
c8f6a362 313 case RDMA_PS_UDP:
5c438135 314 case RDMA_PS_IB:
d2ca39f2 315 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 316 break;
317 case RDMA_PS_IPOIB:
d2ca39f2
YE		 318 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
319 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
320 id_priv->id.port_num, &rec.mgid,
321 &rec);
322 if (!ret)
323 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 324 break;
325 default:
326 break;
327 }
328 return ret;
329}
330
3c86aa70
EC		 331static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
332{
333 int i;
334 int err;
335 struct ib_port_attr props;
336 union ib_gid tmp;
337
338 err = ib_query_port(device, port_num, &props);
339 if (err)
63f05be2 340 return err;
3c86aa70
EC		 341
342 for (i = 0; i < props.gid_tbl_len; ++i) {
343 err = ib_query_gid(device, port_num, i, &tmp);
344 if (err)
63f05be2 345 return err;
3c86aa70
EC		 346 if (!memcmp(&tmp, gid, sizeof tmp))
347 return 0;
348 }
349
63f05be2 350 return -EADDRNOTAVAIL;
3c86aa70
EC		 351}
352
680f920a
SH		 353static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
354{
355 dev_addr->dev_type = ARPHRD_INFINIBAND;
356 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
357 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
358}
359
360static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
361{
362 int ret;
363
364 if (addr->sa_family != AF_IB) {
365 ret = rdma_translate_ip(addr, dev_addr);
366 } else {
367 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
368 ret = 0;
369 }
370
371 return ret;
372}
373
07ebafba 374static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 375{
c8f6a362 376 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 377 struct cma_device *cma_dev;
3c86aa70 378 union ib_gid gid, iboe_gid;
e51060f0 379 int ret = -ENODEV;
3c86aa70
EC		 380 u8 port;
381 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
382 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
e51060f0 383
2efdd6a0
MS		 384 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
385 id_priv->id.ps == RDMA_PS_IPOIB)
386 return -EINVAL;
387
a396d43a 388 mutex_lock(&lock);
3c86aa70
EC		 389 iboe_addr_get_sgid(dev_addr, &iboe_gid);
390 memcpy(&gid, dev_addr->src_dev_addr +
391 rdma_addr_gid_offset(dev_addr), sizeof gid);
e51060f0 392 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70
EC		 393 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
394 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
395 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
396 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
397 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
398 else
399 ret = find_gid_port(cma_dev->device, &gid, port);
400
401 if (!ret) {
402 id_priv->id.port_num = port;
403 goto out;
63f05be2 404 }
3c86aa70 405 }
e51060f0
SH		 406 }
407 }
3c86aa70
EC		 408
409out:
410 if (!ret)
411 cma_attach_to_dev(id_priv, cma_dev);
412
a396d43a 413 mutex_unlock(&lock);
e51060f0
SH		 414 return ret;
415}
416
f17df3b0
SH		 417/*
418 * Select the source IB device and address to reach the destination IB address.
419 */
420static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
421{
422 struct cma_device *cma_dev, *cur_dev;
423 struct sockaddr_ib *addr;
424 union ib_gid gid, sgid, *dgid;
425 u16 pkey, index;
8fb488d7 426 u8 p;
f17df3b0
SH		 427 int i;
428
429 cma_dev = NULL;
430 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
431 dgid = (union ib_gid *) &addr->sib_addr;
432 pkey = ntohs(addr->sib_pkey);
433
434 list_for_each_entry(cur_dev, &dev_list, list) {
435 if (rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
436 continue;
437
438 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
439 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
440 continue;
441
442 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
443 if (!memcmp(&gid, dgid, sizeof(gid))) {
444 cma_dev = cur_dev;
445 sgid = gid;
8fb488d7 446 id_priv->id.port_num = p;
f17df3b0
SH		 447 goto found;
448 }
449
450 if (!cma_dev && (gid.global.subnet_prefix ==
451 dgid->global.subnet_prefix)) {
452 cma_dev = cur_dev;
453 sgid = gid;
8fb488d7 454 id_priv->id.port_num = p;
f17df3b0
SH		 455 }
456 }
457 }
458 }
459
460 if (!cma_dev)
461 return -ENODEV;
462
463found:
464 cma_attach_to_dev(id_priv, cma_dev);
f17df3b0
SH		 465 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
466 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
467 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
468 return 0;
469}
470
e51060f0
SH		 471static void cma_deref_id(struct rdma_id_private *id_priv)
472{
473 if (atomic_dec_and_test(&id_priv->refcount))
474 complete(&id_priv->comp);
475}
476
de910bd9 477static int cma_disable_callback(struct rdma_id_private *id_priv,
550e5ca7 478 enum rdma_cm_state state)
8aa08602 479{
de910bd9
OG		 480 mutex_lock(&id_priv->handler_mutex);
481 if (id_priv->state != state) {
482 mutex_unlock(&id_priv->handler_mutex);
483 return -EINVAL;
484 }
485 return 0;
e51060f0
SH		 486}
487
488struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
b26f9b99
SH		 489 void *context, enum rdma_port_space ps,
490 enum ib_qp_type qp_type)
e51060f0
SH		 491{
492 struct rdma_id_private *id_priv;
493
494 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
495 if (!id_priv)
496 return ERR_PTR(-ENOMEM);
497
83e9502d 498 id_priv->owner = task_pid_nr(current);
550e5ca7 499 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 500 id_priv->id.context = context;
501 id_priv->id.event_handler = event_handler;
502 id_priv->id.ps = ps;
b26f9b99 503 id_priv->id.qp_type = qp_type;
e51060f0 504 spin_lock_init(&id_priv->lock);
c5483388 505 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 506 init_completion(&id_priv->comp);
507 atomic_set(&id_priv->refcount, 1);
de910bd9 508 mutex_init(&id_priv->handler_mutex);
e51060f0 509 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 510 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 511 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
512
513 return &id_priv->id;
514}
515EXPORT_SYMBOL(rdma_create_id);
516
c8f6a362 517static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 518{
519 struct ib_qp_attr qp_attr;
c8f6a362 520 int qp_attr_mask, ret;
e51060f0 521
c8f6a362
SH		 522 qp_attr.qp_state = IB_QPS_INIT;
523 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 524 if (ret)
525 return ret;
526
c8f6a362
SH		 527 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
528 if (ret)
529 return ret;
530
531 qp_attr.qp_state = IB_QPS_RTR;
532 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
533 if (ret)
534 return ret;
535
536 qp_attr.qp_state = IB_QPS_RTS;
537 qp_attr.sq_psn = 0;
538 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
539
540 return ret;
e51060f0
SH		 541}
542
c8f6a362 543static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 544{
545 struct ib_qp_attr qp_attr;
c8f6a362 546 int qp_attr_mask, ret;
07ebafba
TT		 547
548 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 549 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
550 if (ret)
551 return ret;
07ebafba 552
c8f6a362 553 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 554}
555
e51060f0
SH		 556int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
557 struct ib_qp_init_attr *qp_init_attr)
558{
559 struct rdma_id_private *id_priv;
560 struct ib_qp *qp;
561 int ret;
562
563 id_priv = container_of(id, struct rdma_id_private, id);
564 if (id->device != pd->device)
565 return -EINVAL;
566
567 qp = ib_create_qp(pd, qp_init_attr);
568 if (IS_ERR(qp))
569 return PTR_ERR(qp);
570
b26f9b99 571 if (id->qp_type == IB_QPT_UD)
c8f6a362
SH		 572 ret = cma_init_ud_qp(id_priv, qp);
573 else
574 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 575 if (ret)
576 goto err;
577
578 id->qp = qp;
579 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 580 id_priv->srq = (qp->srq != NULL);
581 return 0;
582err:
583 ib_destroy_qp(qp);
584 return ret;
585}
586EXPORT_SYMBOL(rdma_create_qp);
587
588void rdma_destroy_qp(struct rdma_cm_id *id)
589{
c5483388
SH		 590 struct rdma_id_private *id_priv;
591
592 id_priv = container_of(id, struct rdma_id_private, id);
593 mutex_lock(&id_priv->qp_mutex);
594 ib_destroy_qp(id_priv->id.qp);
595 id_priv->id.qp = NULL;
596 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 597}
598EXPORT_SYMBOL(rdma_destroy_qp);
599
5851bb89
SH		 600static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
601 struct rdma_conn_param *conn_param)
e51060f0
SH		 602{
603 struct ib_qp_attr qp_attr;
604 int qp_attr_mask, ret;
605
c5483388
SH		 606 mutex_lock(&id_priv->qp_mutex);
607 if (!id_priv->id.qp) {
608 ret = 0;
609 goto out;
610 }
e51060f0
SH		 611
612 /* Need to update QP attributes from default values. */
613 qp_attr.qp_state = IB_QPS_INIT;
c5483388 614 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 615 if (ret)
c5483388 616 goto out;
e51060f0 617
c5483388 618 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 619 if (ret)
c5483388 620 goto out;
e51060f0
SH		 621
622 qp_attr.qp_state = IB_QPS_RTR;
c5483388 623 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 624 if (ret)
c5483388 625 goto out;
e51060f0 626
5851bb89
SH		 627 if (conn_param)
628 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 629 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
630out:
631 mutex_unlock(&id_priv->qp_mutex);
632 return ret;
e51060f0
SH		 633}
634
5851bb89
SH		 635static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
636 struct rdma_conn_param *conn_param)
e51060f0
SH		 637{
638 struct ib_qp_attr qp_attr;
639 int qp_attr_mask, ret;
640
c5483388
SH		 641 mutex_lock(&id_priv->qp_mutex);
642 if (!id_priv->id.qp) {
643 ret = 0;
644 goto out;
645 }
e51060f0
SH		 646
647 qp_attr.qp_state = IB_QPS_RTS;
c5483388 648 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 649 if (ret)
c5483388 650 goto out;
e51060f0 651
5851bb89
SH		 652 if (conn_param)
653 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 654 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
655out:
656 mutex_unlock(&id_priv->qp_mutex);
657 return ret;
e51060f0
SH		 658}
659
c5483388 660static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 661{
662 struct ib_qp_attr qp_attr;
c5483388 663 int ret;
e51060f0 664
c5483388
SH		 665 mutex_lock(&id_priv->qp_mutex);
666 if (!id_priv->id.qp) {
667 ret = 0;
668 goto out;
669 }
e51060f0
SH		 670
671 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 672 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
673out:
674 mutex_unlock(&id_priv->qp_mutex);
675 return ret;
e51060f0
SH		 676}
677
c8f6a362
SH		 678static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
679 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
680{
681 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
682 int ret;
3c86aa70
EC		 683 u16 pkey;
684
685 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
686 IB_LINK_LAYER_INFINIBAND)
687 pkey = ib_addr_get_pkey(dev_addr);
688 else
689 pkey = 0xffff;
c8f6a362
SH		 690
691 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 692 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 693 if (ret)
694 return ret;
695
696 qp_attr->port_num = id_priv->id.port_num;
697 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
698
b26f9b99 699 if (id_priv->id.qp_type == IB_QPT_UD) {
5c438135 700 ret = cma_set_qkey(id_priv, 0);
d2ca39f2
YE		 701 if (ret)
702 return ret;
703
c8f6a362
SH		 704 qp_attr->qkey = id_priv->qkey;
705 *qp_attr_mask |= IB_QP_QKEY;
706 } else {
707 qp_attr->qp_access_flags = 0;
708 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
709 }
710 return 0;
711}
712
e51060f0
SH		 713int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
714 int *qp_attr_mask)
715{
716 struct rdma_id_private *id_priv;
c8f6a362 717 int ret = 0;
e51060f0
SH		 718
719 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 720 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
721 case RDMA_TRANSPORT_IB:
b26f9b99 722 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 723 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
724 else
725 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
726 qp_attr_mask);
e51060f0
SH		 727 if (qp_attr->qp_state == IB_QPS_RTR)
728 qp_attr->rq_psn = id_priv->seq_num;
729 break;
07ebafba 730 case RDMA_TRANSPORT_IWARP:
c8f6a362 731 if (!id_priv->cm_id.iw) {
8f076531 732 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 733 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
734 } else
735 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
736 qp_attr_mask);
07ebafba 737 break;
e51060f0
SH		 738 default:
739 ret = -ENOSYS;
740 break;
741 }
742
743 return ret;
744}
745EXPORT_SYMBOL(rdma_init_qp_attr);
746
747static inline int cma_zero_addr(struct sockaddr *addr)
748{
2e2d190c
SH		 749 switch (addr->sa_family) {
750 case AF_INET:
751 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
752 case AF_INET6:
753 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
754 case AF_IB:
755 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
756 default:
757 return 0;
e51060f0
SH		 758 }
759}
760
761static inline int cma_loopback_addr(struct sockaddr *addr)
762{
2e2d190c
SH		 763 switch (addr->sa_family) {
764 case AF_INET:
765 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
766 case AF_INET6:
767 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
768 case AF_IB:
769 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
770 default:
771 return 0;
772 }
e51060f0
SH		 773}
774
775static inline int cma_any_addr(struct sockaddr *addr)
776{
777 return cma_zero_addr(addr) || cma_loopback_addr(addr);
778}
779
43b752da
HS		 780static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
781{
782 if (src->sa_family != dst->sa_family)
783 return -1;
784
785 switch (src->sa_family) {
786 case AF_INET:
787 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
788 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2e2d190c 789 case AF_INET6:
43b752da
HS		 790 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
791 &((struct sockaddr_in6 *) dst)->sin6_addr);
2e2d190c
SH		 792 default:
793 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
794 &((struct sockaddr_ib *) dst)->sib_addr);
43b752da
HS		 795 }
796}
797
58afdcb7 798static __be16 cma_port(struct sockaddr *addr)
628e5f6d 799{
58afdcb7
SH		 800 struct sockaddr_ib *sib;
801
802 switch (addr->sa_family) {
803 case AF_INET:
628e5f6d 804 return ((struct sockaddr_in *) addr)->sin_port;
58afdcb7 805 case AF_INET6:
628e5f6d 806 return ((struct sockaddr_in6 *) addr)->sin6_port;
58afdcb7
SH		 807 case AF_IB:
808 sib = (struct sockaddr_ib *) addr;
809 return htons((u16) (be64_to_cpu(sib->sib_sid) &
810 be64_to_cpu(sib->sib_sid_mask)));
811 default:
812 return 0;
813 }
628e5f6d
SH		 814}
815
e51060f0
SH		 816static inline int cma_any_port(struct sockaddr *addr)
817{
628e5f6d 818 return !cma_port(addr);
e51060f0
SH		 819}
820
fbaa1a6d
SH		 821static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
822 struct ib_sa_path_rec *path)
e51060f0 823{
fbaa1a6d
SH		 824 struct sockaddr_ib *listen_ib, *ib;
825
826 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
827 ib = (struct sockaddr_ib *) &id->route.addr.src_addr;
828 ib->sib_family = listen_ib->sib_family;
829 ib->sib_pkey = path->pkey;
830 ib->sib_flowinfo = path->flow_label;
831 memcpy(&ib->sib_addr, &path->sgid, 16);
832 ib->sib_sid = listen_ib->sib_sid;
833 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
834 ib->sib_scope_id = listen_ib->sib_scope_id;
835
836 ib = (struct sockaddr_ib *) &id->route.addr.dst_addr;
837 ib->sib_family = listen_ib->sib_family;
838 ib->sib_pkey = path->pkey;
839 ib->sib_flowinfo = path->flow_label;
840 memcpy(&ib->sib_addr, &path->dgid, 16);
841}
e51060f0 842
fbaa1a6d
SH		 843static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
844 struct cma_hdr *hdr)
845{
846 struct sockaddr_in *listen4, *ip4;
e51060f0 847
fbaa1a6d
SH		 848 listen4 = (struct sockaddr_in *) &listen_id->route.addr.src_addr;
849 ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
850 ip4->sin_family = listen4->sin_family;
851 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
852 ip4->sin_port = listen4->sin_port;
853
854 ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
855 ip4->sin_family = listen4->sin_family;
856 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
857 ip4->sin_port = hdr->port;
e51060f0
SH		 858}
859
fbaa1a6d
SH		 860static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
861 struct cma_hdr *hdr)
e51060f0 862{
e51060f0
SH		 863 struct sockaddr_in6 *listen6, *ip6;
864
fbaa1a6d
SH		 865 listen6 = (struct sockaddr_in6 *) &listen_id->route.addr.src_addr;
866 ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
867 ip6->sin6_family = listen6->sin6_family;
868 ip6->sin6_addr = hdr->dst_addr.ip6;
869 ip6->sin6_port = listen6->sin6_port;
870
871 ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
872 ip6->sin6_family = listen6->sin6_family;
873 ip6->sin6_addr = hdr->src_addr.ip6;
874 ip6->sin6_port = hdr->port;
875}
876
877static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
878 struct ib_cm_event *ib_event)
879{
880 struct cma_hdr *hdr;
881
5eb695c1
SH		 882 if ((listen_id->route.addr.src_addr.ss_family == AF_IB) &&
883 (ib_event->event == IB_CM_REQ_RECEIVED)) {
fbaa1a6d
SH		 884 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path);
885 return 0;
886 }
887
888 hdr = ib_event->private_data;
889 if (hdr->cma_version != CMA_VERSION)
890 return -EINVAL;
891
892 switch (cma_get_ip_ver(hdr)) {
e51060f0 893 case 4:
fbaa1a6d 894 cma_save_ip4_info(id, listen_id, hdr);
e51060f0
SH		 895 break;
896 case 6:
fbaa1a6d 897 cma_save_ip6_info(id, listen_id, hdr);
e51060f0
SH		 898 break;
899 default:
fbaa1a6d 900 return -EINVAL;
e51060f0 901 }
fbaa1a6d 902 return 0;
e51060f0
SH		 903}
904
e8160e15 905static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
e51060f0 906{
e8160e15 907 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
e51060f0
SH		 908}
909
e51060f0
SH		 910static void cma_cancel_route(struct rdma_id_private *id_priv)
911{
3c86aa70
EC		 912 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
913 case IB_LINK_LAYER_INFINIBAND:
e51060f0
SH		 914 if (id_priv->query)
915 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
916 break;
917 default:
918 break;
919 }
920}
921
e51060f0
SH		 922static void cma_cancel_listens(struct rdma_id_private *id_priv)
923{
924 struct rdma_id_private *dev_id_priv;
925
d02d1f53
SH		 926 /*
927 * Remove from listen_any_list to prevent added devices from spawning
928 * additional listen requests.
929 */
e51060f0
SH		 930 mutex_lock(&lock);
931 list_del(&id_priv->list);
932
933 while (!list_empty(&id_priv->listen_list)) {
934 dev_id_priv = list_entry(id_priv->listen_list.next,
935 struct rdma_id_private, listen_list);
d02d1f53
SH		 936 /* sync with device removal to avoid duplicate destruction */
937 list_del_init(&dev_id_priv->list);
938 list_del(&dev_id_priv->listen_list);
939 mutex_unlock(&lock);
940
941 rdma_destroy_id(&dev_id_priv->id);
942 mutex_lock(&lock);
e51060f0
SH		 943 }
944 mutex_unlock(&lock);
945}
946
947static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 948 enum rdma_cm_state state)
e51060f0
SH		 949{
950 switch (state) {
550e5ca7 951 case RDMA_CM_ADDR_QUERY:
e51060f0
SH		 952 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
953 break;
550e5ca7 954 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 955 cma_cancel_route(id_priv);
956 break;
550e5ca7 957 case RDMA_CM_LISTEN:
f4753834 958 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
e51060f0
SH		 959 cma_cancel_listens(id_priv);
960 break;
961 default:
962 break;
963 }
964}
965
966static void cma_release_port(struct rdma_id_private *id_priv)
967{
968 struct rdma_bind_list *bind_list = id_priv->bind_list;
969
970 if (!bind_list)
971 return;
972
973 mutex_lock(&lock);
974 hlist_del(&id_priv->node);
975 if (hlist_empty(&bind_list->owners)) {
976 idr_remove(bind_list->ps, bind_list->port);
977 kfree(bind_list);
978 }
979 mutex_unlock(&lock);
980}
981
c8f6a362
SH		 982static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
983{
984 struct cma_multicast *mc;
985
986 while (!list_empty(&id_priv->mc_list)) {
987 mc = container_of(id_priv->mc_list.next,
988 struct cma_multicast, list);
989 list_del(&mc->list);
3c86aa70
EC		 990 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
991 case IB_LINK_LAYER_INFINIBAND:
992 ib_sa_free_multicast(mc->multicast.ib);
993 kfree(mc);
994 break;
995 case IB_LINK_LAYER_ETHERNET:
996 kref_put(&mc->mcref, release_mc);
997 break;
998 default:
999 break;
1000 }
c8f6a362
SH		 1001 }
1002}
1003
e51060f0
SH		 1004void rdma_destroy_id(struct rdma_cm_id *id)
1005{
1006 struct rdma_id_private *id_priv;
550e5ca7 1007 enum rdma_cm_state state;
e51060f0
SH		 1008
1009 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1010 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1011 cma_cancel_operation(id_priv, state);
1012
a396d43a
SH		 1013 /*
1014 * Wait for any active callback to finish. New callbacks will find
1015 * the id_priv state set to destroying and abort.
1016 */
1017 mutex_lock(&id_priv->handler_mutex);
1018 mutex_unlock(&id_priv->handler_mutex);
1019
e51060f0 1020 if (id_priv->cma_dev) {
3c86aa70 1021 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
07ebafba 1022 case RDMA_TRANSPORT_IB:
0c9361fc 1023 if (id_priv->cm_id.ib)
e51060f0
SH		 1024 ib_destroy_cm_id(id_priv->cm_id.ib);
1025 break;
07ebafba 1026 case RDMA_TRANSPORT_IWARP:
0c9361fc 1027 if (id_priv->cm_id.iw)
07ebafba
TT		 1028 iw_destroy_cm_id(id_priv->cm_id.iw);
1029 break;
e51060f0
SH		 1030 default:
1031 break;
1032 }
c8f6a362 1033 cma_leave_mc_groups(id_priv);
a396d43a 1034 cma_release_dev(id_priv);
e51060f0
SH		 1035 }
1036
1037 cma_release_port(id_priv);
1038 cma_deref_id(id_priv);
1039 wait_for_completion(&id_priv->comp);
1040
d02d1f53
SH		 1041 if (id_priv->internal_id)
1042 cma_deref_id(id_priv->id.context);
1043
e51060f0
SH		 1044 kfree(id_priv->id.route.path_rec);
1045 kfree(id_priv);
1046}
1047EXPORT_SYMBOL(rdma_destroy_id);
1048
1049static int cma_rep_recv(struct rdma_id_private *id_priv)
1050{
1051 int ret;
1052
5851bb89 1053 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 1054 if (ret)
1055 goto reject;
1056
5851bb89 1057 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 1058 if (ret)
1059 goto reject;
1060
1061 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1062 if (ret)
1063 goto reject;
1064
1065 return 0;
1066reject:
c5483388 1067 cma_modify_qp_err(id_priv);
e51060f0
SH		 1068 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1069 NULL, 0, NULL, 0);
1070 return ret;
1071}
1072
a1b1b61f
SH		 1073static void cma_set_rep_event_data(struct rdma_cm_event *event,
1074 struct ib_cm_rep_event_param *rep_data,
1075 void *private_data)
1076{
1077 event->param.conn.private_data = private_data;
1078 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1079 event->param.conn.responder_resources = rep_data->responder_resources;
1080 event->param.conn.initiator_depth = rep_data->initiator_depth;
1081 event->param.conn.flow_control = rep_data->flow_control;
1082 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1083 event->param.conn.srq = rep_data->srq;
1084 event->param.conn.qp_num = rep_data->remote_qpn;
1085}
1086
e51060f0
SH		 1087static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1088{
1089 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 1090 struct rdma_cm_event event;
1091 int ret = 0;
e51060f0 1092
38ca83a5 1093 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1094 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
38ca83a5 1095 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1096 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
8aa08602 1097 return 0;
e51060f0 1098
a1b1b61f 1099 memset(&event, 0, sizeof event);
e51060f0
SH		 1100 switch (ib_event->event) {
1101 case IB_CM_REQ_ERROR:
1102 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1103 event.event = RDMA_CM_EVENT_UNREACHABLE;
1104 event.status = -ETIMEDOUT;
e51060f0
SH		 1105 break;
1106 case IB_CM_REP_RECEIVED:
01602f11 1107 if (id_priv->id.qp) {
a1b1b61f
SH		 1108 event.status = cma_rep_recv(id_priv);
1109 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1110 RDMA_CM_EVENT_ESTABLISHED;
01602f11 1111 } else {
a1b1b61f 1112 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
01602f11 1113 }
a1b1b61f
SH		 1114 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1115 ib_event->private_data);
e51060f0
SH		 1116 break;
1117 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1118 case IB_CM_USER_ESTABLISHED:
1119 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1120 break;
1121 case IB_CM_DREQ_ERROR:
a1b1b61f 1122 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1123 case IB_CM_DREQ_RECEIVED:
1124 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 1125 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1126 RDMA_CM_DISCONNECT))
e51060f0 1127 goto out;
a1b1b61f 1128 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1129 break;
1130 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1131 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1132 break;
e51060f0
SH		 1133 case IB_CM_MRA_RECEIVED:
1134 /* ignore event */
1135 goto out;
1136 case IB_CM_REJ_RECEIVED:
c5483388 1137 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1138 event.status = ib_event->param.rej_rcvd.reason;
1139 event.event = RDMA_CM_EVENT_REJECTED;
1140 event.param.conn.private_data = ib_event->private_data;
1141 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1142 break;
1143 default:
468f2239 1144 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1145 ib_event->event);
1146 goto out;
1147 }
1148
a1b1b61f 1149 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1150 if (ret) {
1151 /* Destroy the CM ID by returning a non-zero value. */
1152 id_priv->cm_id.ib = NULL;
550e5ca7 1153 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1154 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1155 rdma_destroy_id(&id_priv->id);
1156 return ret;
1157 }
1158out:
de910bd9 1159 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1160 return ret;
1161}
1162
628e5f6d
SH		 1163static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1164 struct ib_cm_event *ib_event)
e51060f0
SH		 1165{
1166 struct rdma_id_private *id_priv;
1167 struct rdma_cm_id *id;
1168 struct rdma_route *rt;
64c5e613 1169 int ret;
e51060f0
SH		 1170
1171 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1172 listen_id->ps, ib_event->param.req_rcvd.qp_type);
e51060f0 1173 if (IS_ERR(id))
0c9361fc 1174 return NULL;
3f168d2b 1175
f4753834 1176 id_priv = container_of(id, struct rdma_id_private, id);
fbaa1a6d
SH		 1177 if (cma_save_net_info(id, listen_id, ib_event))
1178 goto err;
e51060f0
SH		 1179
1180 rt = &id->route;
1181 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1182 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1183 GFP_KERNEL);
e51060f0 1184 if (!rt->path_rec)
0c9361fc 1185 goto err;
e51060f0 1186
e51060f0
SH		 1187 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1188 if (rt->num_paths == 2)
1189 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1190
f4753834 1191 if (cma_any_addr(cma_src_addr(id_priv))) {
6f8372b6
SH		 1192 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1193 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
46ea5061 1194 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
6f8372b6 1195 } else {
f4753834 1196 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
6f8372b6 1197 if (ret)
0c9361fc 1198 goto err;
6f8372b6
SH		 1199 }
1200 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0 1201
550e5ca7 1202 id_priv->state = RDMA_CM_CONNECT;
e51060f0 1203 return id_priv;
3f168d2b 1204
3f168d2b 1205err:
0c9361fc 1206 rdma_destroy_id(id);
e51060f0
SH		 1207 return NULL;
1208}
1209
628e5f6d
SH		 1210static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1211 struct ib_cm_event *ib_event)
1212{
1213 struct rdma_id_private *id_priv;
1214 struct rdma_cm_id *id;
628e5f6d
SH		 1215 int ret;
1216
1217 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1218 listen_id->ps, IB_QPT_UD);
628e5f6d
SH		 1219 if (IS_ERR(id))
1220 return NULL;
1221
f4753834 1222 id_priv = container_of(id, struct rdma_id_private, id);
fbaa1a6d 1223 if (cma_save_net_info(id, listen_id, ib_event))
628e5f6d
SH		 1224 goto err;
1225
6f8372b6 1226 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
f4753834 1227 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr);
6f8372b6
SH		 1228 if (ret)
1229 goto err;
1230 }
628e5f6d 1231
550e5ca7 1232 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 1233 return id_priv;
1234err:
1235 rdma_destroy_id(id);
1236 return NULL;
1237}
1238
a1b1b61f
SH		 1239static void cma_set_req_event_data(struct rdma_cm_event *event,
1240 struct ib_cm_req_event_param *req_data,
1241 void *private_data, int offset)
1242{
1243 event->param.conn.private_data = private_data + offset;
1244 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1245 event->param.conn.responder_resources = req_data->responder_resources;
1246 event->param.conn.initiator_depth = req_data->initiator_depth;
1247 event->param.conn.flow_control = req_data->flow_control;
1248 event->param.conn.retry_count = req_data->retry_count;
1249 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1250 event->param.conn.srq = req_data->srq;
1251 event->param.conn.qp_num = req_data->remote_qpn;
1252}
1253
9595480c
HS		 1254static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1255{
4dd81e89 1256 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 1257 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1258 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1259 (id->qp_type == IB_QPT_UD)) ||
1260 (!id->qp_type));
1261}
1262
e51060f0
SH		 1263static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1264{
1265 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1266 struct rdma_cm_event event;
e51060f0
SH		 1267 int offset, ret;
1268
1269 listen_id = cm_id->context;
9595480c
HS		 1270 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1271 return -EINVAL;
1272
550e5ca7 1273 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1274 return -ECONNABORTED;
e51060f0 1275
628e5f6d 1276 memset(&event, 0, sizeof event);
e8160e15 1277 offset = cma_user_data_offset(listen_id);
628e5f6d 1278 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 1279 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
628e5f6d
SH		 1280 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1281 event.param.ud.private_data = ib_event->private_data + offset;
1282 event.param.ud.private_data_len =
1283 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1284 } else {
1285 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1286 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1287 ib_event->private_data, offset);
1288 }
e51060f0
SH		 1289 if (!conn_id) {
1290 ret = -ENOMEM;
b6cec8aa 1291 goto err1;
e51060f0
SH		 1292 }
1293
de910bd9 1294 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba 1295 ret = cma_acquire_dev(conn_id);
a1a733f6 1296 if (ret)
b6cec8aa 1297 goto err2;
e51060f0
SH		 1298
1299 conn_id->cm_id.ib = cm_id;
1300 cm_id->context = conn_id;
1301 cm_id->cm_handler = cma_ib_handler;
1302
25ae21a1
SH		 1303 /*
1304 * Protect against the user destroying conn_id from another thread
1305 * until we're done accessing it.
1306 */
1307 atomic_inc(&conn_id->refcount);
a1b1b61f 1308 ret = conn_id->id.event_handler(&conn_id->id, &event);
b6cec8aa
SH		 1309 if (ret)
1310 goto err3;
1311
1312 /*
1313 * Acquire mutex to prevent user executing rdma_destroy_id()
1314 * while we're accessing the cm_id.
1315 */
1316 mutex_lock(&lock);
1317 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1318 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1319 mutex_unlock(&lock);
1320 mutex_unlock(&conn_id->handler_mutex);
1321 mutex_unlock(&listen_id->handler_mutex);
25ae21a1 1322 cma_deref_id(conn_id);
b6cec8aa 1323 return 0;
a1a733f6 1324
b6cec8aa
SH		 1325err3:
1326 cma_deref_id(conn_id);
a1a733f6
KK		 1327 /* Destroy the CM ID by returning a non-zero value. */
1328 conn_id->cm_id.ib = NULL;
b6cec8aa 1329err2:
550e5ca7 1330 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1331 mutex_unlock(&conn_id->handler_mutex);
b6cec8aa 1332err1:
de910bd9 1333 mutex_unlock(&listen_id->handler_mutex);
b6cec8aa
SH		 1334 if (conn_id)
1335 rdma_destroy_id(&conn_id->id);
e51060f0
SH		 1336 return ret;
1337}
1338
cf53936f 1339__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
e51060f0 1340{
496ce3ce
SH		 1341 if (addr->sa_family == AF_IB)
1342 return ((struct sockaddr_ib *) addr)->sib_sid;
1343
cf53936f 1344 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0 1345}
cf53936f 1346EXPORT_SYMBOL(rdma_get_service_id);
e51060f0
SH		 1347
1348static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1349 struct ib_cm_compare_data *compare)
1350{
1351 struct cma_hdr *cma_data, *cma_mask;
1b90c137 1352 __be32 ip4_addr;
e51060f0
SH		 1353 struct in6_addr ip6_addr;
1354
1355 memset(compare, 0, sizeof *compare);
1356 cma_data = (void *) compare->data;
1357 cma_mask = (void *) compare->mask;
e51060f0
SH		 1358
1359 switch (addr->sa_family) {
1360 case AF_INET:
1361 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
01602f11
SH		 1362 cma_set_ip_ver(cma_data, 4);
1363 cma_set_ip_ver(cma_mask, 0xF);
1364 if (!cma_any_addr(addr)) {
1365 cma_data->dst_addr.ip4.addr = ip4_addr;
1366 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1367 }
1368 break;
1369 case AF_INET6:
1370 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
01602f11
SH		 1371 cma_set_ip_ver(cma_data, 6);
1372 cma_set_ip_ver(cma_mask, 0xF);
1373 if (!cma_any_addr(addr)) {
1374 cma_data->dst_addr.ip6 = ip6_addr;
1375 memset(&cma_mask->dst_addr.ip6, 0xFF,
1376 sizeof cma_mask->dst_addr.ip6);
e51060f0
SH		 1377 }
1378 break;
1379 default:
1380 break;
1381 }
1382}
1383
07ebafba
TT		 1384static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1385{
1386 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1387 struct rdma_cm_event event;
07ebafba
TT		 1388 struct sockaddr_in *sin;
1389 int ret = 0;
1390
550e5ca7 1391 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
be65f086 1392 return 0;
07ebafba 1393
be65f086 1394 memset(&event, 0, sizeof event);
07ebafba
TT		 1395 switch (iw_event->event) {
1396 case IW_CM_EVENT_CLOSE:
a1b1b61f 1397 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1398 break;
1399 case IW_CM_EVENT_CONNECT_REPLY:
f4753834 1400 sin = (struct sockaddr_in *) cma_src_addr(id_priv);
07ebafba 1401 *sin = iw_event->local_addr;
f4753834 1402 sin = (struct sockaddr_in *) cma_dst_addr(id_priv);
07ebafba 1403 *sin = iw_event->remote_addr;
881a045f
SW		 1404 switch (iw_event->status) {
1405 case 0:
a1b1b61f 1406 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1407 event.param.conn.initiator_depth = iw_event->ird;
1408 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 1409 break;
1410 case -ECONNRESET:
1411 case -ECONNREFUSED:
1412 event.event = RDMA_CM_EVENT_REJECTED;
1413 break;
1414 case -ETIMEDOUT:
1415 event.event = RDMA_CM_EVENT_UNREACHABLE;
1416 break;
1417 default:
1418 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1419 break;
1420 }
07ebafba
TT		 1421 break;
1422 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1423 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1424 event.param.conn.initiator_depth = iw_event->ird;
1425 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 1426 break;
1427 default:
1428 BUG_ON(1);
1429 }
1430
a1b1b61f
SH		 1431 event.status = iw_event->status;
1432 event.param.conn.private_data = iw_event->private_data;
1433 event.param.conn.private_data_len = iw_event->private_data_len;
1434 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1435 if (ret) {
1436 /* Destroy the CM ID by returning a non-zero value. */
1437 id_priv->cm_id.iw = NULL;
550e5ca7 1438 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1439 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1440 rdma_destroy_id(&id_priv->id);
1441 return ret;
1442 }
1443
de910bd9 1444 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1445 return ret;
1446}
1447
1448static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1449 struct iw_cm_event *iw_event)
1450{
1451 struct rdma_cm_id *new_cm_id;
1452 struct rdma_id_private *listen_id, *conn_id;
1453 struct sockaddr_in *sin;
1454 struct net_device *dev = NULL;
a1b1b61f 1455 struct rdma_cm_event event;
07ebafba 1456 int ret;
8d8293cf 1457 struct ib_device_attr attr;
07ebafba
TT		 1458
1459 listen_id = cm_id->context;
550e5ca7 1460 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1461 return -ECONNABORTED;
07ebafba
TT		 1462
1463 /* Create a new RDMA id for the new IW CM ID */
1464 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1465 listen_id->id.context,
b26f9b99 1466 RDMA_PS_TCP, IB_QPT_RC);
10f32065 1467 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1468 ret = -ENOMEM;
1469 goto out;
1470 }
1471 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1472 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 1473 conn_id->state = RDMA_CM_CONNECT;
07ebafba 1474
1ab35276 1475 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
07ebafba
TT		 1476 if (!dev) {
1477 ret = -EADDRNOTAVAIL;
de910bd9 1478 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1479 rdma_destroy_id(new_cm_id);
1480 goto out;
1481 }
1482 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1483 if (ret) {
de910bd9 1484 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1485 rdma_destroy_id(new_cm_id);
1486 goto out;
1487 }
1488
1489 ret = cma_acquire_dev(conn_id);
1490 if (ret) {
de910bd9 1491 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1492 rdma_destroy_id(new_cm_id);
1493 goto out;
1494 }
1495
1496 conn_id->cm_id.iw = cm_id;
1497 cm_id->context = conn_id;
1498 cm_id->cm_handler = cma_iw_handler;
1499
f4753834 1500 sin = (struct sockaddr_in *) cma_src_addr(conn_id);
07ebafba 1501 *sin = iw_event->local_addr;
f4753834 1502 sin = (struct sockaddr_in *) cma_dst_addr(conn_id);
07ebafba
TT		 1503 *sin = iw_event->remote_addr;
1504
8d8293cf
SW		 1505 ret = ib_query_device(conn_id->id.device, &attr);
1506 if (ret) {
de910bd9 1507 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1508 rdma_destroy_id(new_cm_id);
1509 goto out;
1510 }
1511
a1b1b61f
SH		 1512 memset(&event, 0, sizeof event);
1513 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1514 event.param.conn.private_data = iw_event->private_data;
1515 event.param.conn.private_data_len = iw_event->private_data_len;
3ebeebc3
KS		 1516 event.param.conn.initiator_depth = iw_event->ird;
1517 event.param.conn.responder_resources = iw_event->ord;
25ae21a1
SH		 1518
1519 /*
1520 * Protect against the user destroying conn_id from another thread
1521 * until we're done accessing it.
1522 */
1523 atomic_inc(&conn_id->refcount);
a1b1b61f 1524 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1525 if (ret) {
1526 /* User wants to destroy the CM ID */
1527 conn_id->cm_id.iw = NULL;
550e5ca7 1528 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1529 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1530 cma_deref_id(conn_id);
07ebafba 1531 rdma_destroy_id(&conn_id->id);
de910bd9 1532 goto out;
07ebafba
TT		 1533 }
1534
de910bd9 1535 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1536 cma_deref_id(conn_id);
de910bd9 1537
07ebafba
TT		 1538out:
1539 if (dev)
1540 dev_put(dev);
de910bd9 1541 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1542 return ret;
1543}
1544
e51060f0
SH		 1545static int cma_ib_listen(struct rdma_id_private *id_priv)
1546{
1547 struct ib_cm_compare_data compare_data;
1548 struct sockaddr *addr;
0c9361fc 1549 struct ib_cm_id *id;
e51060f0
SH		 1550 __be64 svc_id;
1551 int ret;
1552
0c9361fc
JM		 1553 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1554 if (IS_ERR(id))
1555 return PTR_ERR(id);
1556
1557 id_priv->cm_id.ib = id;
e51060f0 1558
f4753834 1559 addr = cma_src_addr(id_priv);
cf53936f 1560 svc_id = rdma_get_service_id(&id_priv->id, addr);
406b6a25 1561 if (cma_any_addr(addr) && !id_priv->afonly)
e51060f0
SH		 1562 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1563 else {
1564 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1565 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1566 }
1567
1568 if (ret) {
1569 ib_destroy_cm_id(id_priv->cm_id.ib);
1570 id_priv->cm_id.ib = NULL;
1571 }
1572
1573 return ret;
1574}
1575
07ebafba
TT		 1576static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1577{
1578 int ret;
1579 struct sockaddr_in *sin;
0c9361fc
JM		 1580 struct iw_cm_id *id;
1581
1582 id = iw_create_cm_id(id_priv->id.device,
1583 iw_conn_req_handler,
1584 id_priv);
1585 if (IS_ERR(id))
1586 return PTR_ERR(id);
07ebafba 1587
0c9361fc 1588 id_priv->cm_id.iw = id;
07ebafba 1589
f4753834 1590 sin = (struct sockaddr_in *) cma_src_addr(id_priv);
07ebafba
TT		 1591 id_priv->cm_id.iw->local_addr = *sin;
1592
1593 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1594
1595 if (ret) {
1596 iw_destroy_cm_id(id_priv->cm_id.iw);
1597 id_priv->cm_id.iw = NULL;
1598 }
1599
1600 return ret;
1601}
1602
e51060f0
SH		 1603static int cma_listen_handler(struct rdma_cm_id *id,
1604 struct rdma_cm_event *event)
1605{
1606 struct rdma_id_private *id_priv = id->context;
1607
1608 id->context = id_priv->id.context;
1609 id->event_handler = id_priv->id.event_handler;
1610 return id_priv->id.event_handler(id, event);
1611}
1612
1613static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1614 struct cma_device *cma_dev)
1615{
1616 struct rdma_id_private *dev_id_priv;
1617 struct rdma_cm_id *id;
1618 int ret;
1619
94d0c939
SH		 1620 if (cma_family(id_priv) == AF_IB &&
1621 rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB)
1622 return;
1623
b26f9b99
SH		 1624 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1625 id_priv->id.qp_type);
e51060f0
SH		 1626 if (IS_ERR(id))
1627 return;
1628
1629 dev_id_priv = container_of(id, struct rdma_id_private, id);
1630
550e5ca7 1631 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
f4753834
SH		 1632 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
1633 rdma_addr_size(cma_src_addr(id_priv)));
e51060f0
SH		 1634
1635 cma_attach_to_dev(dev_id_priv, cma_dev);
1636 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1637 atomic_inc(&id_priv->refcount);
1638 dev_id_priv->internal_id = 1;
5b0ec991 1639 dev_id_priv->afonly = id_priv->afonly;
e51060f0
SH		 1640
1641 ret = rdma_listen(id, id_priv->backlog);
1642 if (ret)
d02d1f53 1643 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1644 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1645}
1646
1647static void cma_listen_on_all(struct rdma_id_private *id_priv)
1648{
1649 struct cma_device *cma_dev;
1650
1651 mutex_lock(&lock);
1652 list_add_tail(&id_priv->list, &listen_any_list);
1653 list_for_each_entry(cma_dev, &dev_list, list)
1654 cma_listen_on_dev(id_priv, cma_dev);
1655 mutex_unlock(&lock);
1656}
1657
a81c994d
SH		 1658void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1659{
1660 struct rdma_id_private *id_priv;
1661
1662 id_priv = container_of(id, struct rdma_id_private, id);
1663 id_priv->tos = (u8) tos;
1664}
1665EXPORT_SYMBOL(rdma_set_service_type);
1666
e51060f0
SH		 1667static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1668 void *context)
1669{
1670 struct cma_work *work = context;
1671 struct rdma_route *route;
1672
1673 route = &work->id->id.route;
1674
1675 if (!status) {
1676 route->num_paths = 1;
1677 *route->path_rec = *path_rec;
1678 } else {
550e5ca7
NM		 1679 work->old_state = RDMA_CM_ROUTE_QUERY;
1680 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0 1681 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1682 work->event.status = status;
e51060f0
SH		 1683 }
1684
1685 queue_work(cma_wq, &work->work);
1686}
1687
1688static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1689 struct cma_work *work)
1690{
f4753834 1691 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 1692 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1693 ib_sa_comp_mask comp_mask;
1694 struct sockaddr_in6 *sin6;
f68194ca 1695 struct sockaddr_ib *sib;
e51060f0
SH		 1696
1697 memset(&path_rec, 0, sizeof path_rec);
f4753834
SH		 1698 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
1699 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
1700 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
e51060f0 1701 path_rec.numb_path = 1;
962063e6 1702 path_rec.reversible = 1;
cf53936f 1703 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
a81c994d
SH		 1704
1705 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1706 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1707 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1708
f68194ca
SH		 1709 switch (cma_family(id_priv)) {
1710 case AF_INET:
a81c994d
SH		 1711 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1712 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
f68194ca
SH		 1713 break;
1714 case AF_INET6:
f4753834 1715 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
a81c994d
SH		 1716 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1717 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
f68194ca
SH		 1718 break;
1719 case AF_IB:
1720 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
1721 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
1722 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1723 break;
a81c994d 1724 }
e51060f0 1725
c1a0b23b 1726 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1727 id_priv->id.port_num, &path_rec,
1728 comp_mask, timeout_ms,
1729 GFP_KERNEL, cma_query_handler,
1730 work, &id_priv->query);
e51060f0
SH		 1731
1732 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1733}
1734
c4028958 1735static void cma_work_handler(struct work_struct *_work)
e51060f0 1736{
c4028958 1737 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1738 struct rdma_id_private *id_priv = work->id;
1739 int destroy = 0;
1740
de910bd9 1741 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1742 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1743 goto out;
1744
1745 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1746 cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1747 destroy = 1;
1748 }
1749out:
de910bd9 1750 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1751 cma_deref_id(id_priv);
1752 if (destroy)
1753 rdma_destroy_id(&id_priv->id);
1754 kfree(work);
1755}
1756
dd5bdff8
OG		 1757static void cma_ndev_work_handler(struct work_struct *_work)
1758{
1759 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1760 struct rdma_id_private *id_priv = work->id;
1761 int destroy = 0;
1762
1763 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 1764 if (id_priv->state == RDMA_CM_DESTROYING ||
1765 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
dd5bdff8
OG		 1766 goto out;
1767
1768 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1769 cma_exch(id_priv, RDMA_CM_DESTROYING);
dd5bdff8
OG		 1770 destroy = 1;
1771 }
1772
1773out:
1774 mutex_unlock(&id_priv->handler_mutex);
1775 cma_deref_id(id_priv);
1776 if (destroy)
1777 rdma_destroy_id(&id_priv->id);
1778 kfree(work);
1779}
1780
e51060f0
SH		 1781static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1782{
1783 struct rdma_route *route = &id_priv->id.route;
1784 struct cma_work *work;
1785 int ret;
1786
1787 work = kzalloc(sizeof *work, GFP_KERNEL);
1788 if (!work)
1789 return -ENOMEM;
1790
1791 work->id = id_priv;
c4028958 1792 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1793 work->old_state = RDMA_CM_ROUTE_QUERY;
1794 work->new_state = RDMA_CM_ROUTE_RESOLVED;
e51060f0
SH		 1795 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1796
1797 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1798 if (!route->path_rec) {
1799 ret = -ENOMEM;
1800 goto err1;
1801 }
1802
1803 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1804 if (ret)
1805 goto err2;
1806
1807 return 0;
1808err2:
1809 kfree(route->path_rec);
1810 route->path_rec = NULL;
1811err1:
1812 kfree(work);
1813 return ret;
1814}
1815
1816int rdma_set_ib_paths(struct rdma_cm_id *id,
1817 struct ib_sa_path_rec *path_rec, int num_paths)
1818{
1819 struct rdma_id_private *id_priv;
1820 int ret;
1821
1822 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 1823 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1824 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 1825 return -EINVAL;
1826
9893e742
JL		 1827 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1828 GFP_KERNEL);
e51060f0
SH		 1829 if (!id->route.path_rec) {
1830 ret = -ENOMEM;
1831 goto err;
1832 }
1833
ae2d9293 1834 id->route.num_paths = num_paths;
e51060f0
SH		 1835 return 0;
1836err:
550e5ca7 1837 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 1838 return ret;
1839}
1840EXPORT_SYMBOL(rdma_set_ib_paths);
1841
07ebafba
TT		 1842static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1843{
1844 struct cma_work *work;
1845
1846 work = kzalloc(sizeof *work, GFP_KERNEL);
1847 if (!work)
1848 return -ENOMEM;
1849
1850 work->id = id_priv;
c4028958 1851 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1852 work->old_state = RDMA_CM_ROUTE_QUERY;
1853 work->new_state = RDMA_CM_ROUTE_RESOLVED;
07ebafba
TT		 1854 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1855 queue_work(cma_wq, &work->work);
1856 return 0;
1857}
1858
3c86aa70
EC		 1859static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1860{
1861 struct rdma_route *route = &id_priv->id.route;
1862 struct rdma_addr *addr = &route->addr;
1863 struct cma_work *work;
1864 int ret;
3c86aa70 1865 struct net_device *ndev = NULL;
af7bd463 1866 u16 vid;
3c86aa70 1867
3c86aa70
EC		 1868 work = kzalloc(sizeof *work, GFP_KERNEL);
1869 if (!work)
1870 return -ENOMEM;
1871
1872 work->id = id_priv;
1873 INIT_WORK(&work->work, cma_work_handler);
1874
1875 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1876 if (!route->path_rec) {
1877 ret = -ENOMEM;
1878 goto err1;
1879 }
1880
1881 route->num_paths = 1;
1882
3c86aa70
EC		 1883 if (addr->dev_addr.bound_dev_if)
1884 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1885 if (!ndev) {
1886 ret = -ENODEV;
1887 goto err2;
1888 }
1889
af7bd463
EC		 1890 vid = rdma_vlan_dev_vlan_id(ndev);
1891
1892 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1893 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1894
1895 route->path_rec->hop_limit = 1;
1896 route->path_rec->reversible = 1;
1897 route->path_rec->pkey = cpu_to_be16(0xffff);
1898 route->path_rec->mtu_selector = IB_SA_EQ;
366cddb4
AV		 1899 route->path_rec->sl = netdev_get_prio_tc_map(
1900 ndev->priv_flags & IFF_802_1Q_VLAN ?
1901 vlan_dev_real_dev(ndev) : ndev,
1902 rt_tos2priority(id_priv->tos));
af7bd463 1903
3c86aa70
EC		 1904 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1905 route->path_rec->rate_selector = IB_SA_EQ;
1906 route->path_rec->rate = iboe_get_rate(ndev);
1907 dev_put(ndev);
1908 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1909 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1910 if (!route->path_rec->mtu) {
1911 ret = -EINVAL;
1912 goto err2;
1913 }
1914
550e5ca7
NM		 1915 work->old_state = RDMA_CM_ROUTE_QUERY;
1916 work->new_state = RDMA_CM_ROUTE_RESOLVED;
3c86aa70
EC		 1917 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1918 work->event.status = 0;
1919
1920 queue_work(cma_wq, &work->work);
1921
1922 return 0;
1923
1924err2:
1925 kfree(route->path_rec);
1926 route->path_rec = NULL;
1927err1:
1928 kfree(work);
1929 return ret;
1930}
1931
e51060f0
SH		 1932int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1933{
1934 struct rdma_id_private *id_priv;
1935 int ret;
1936
1937 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1938 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 1939 return -EINVAL;
1940
1941 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1942 switch (rdma_node_get_transport(id->device->node_type)) {
1943 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 1944 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1945 case IB_LINK_LAYER_INFINIBAND:
1946 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1947 break;
1948 case IB_LINK_LAYER_ETHERNET:
1949 ret = cma_resolve_iboe_route(id_priv);
1950 break;
1951 default:
1952 ret = -ENOSYS;
1953 }
e51060f0 1954 break;
07ebafba
TT		 1955 case RDMA_TRANSPORT_IWARP:
1956 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1957 break;
e51060f0
SH		 1958 default:
1959 ret = -ENOSYS;
1960 break;
1961 }
1962 if (ret)
1963 goto err;
1964
1965 return 0;
1966err:
550e5ca7 1967 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 1968 cma_deref_id(id_priv);
1969 return ret;
1970}
1971EXPORT_SYMBOL(rdma_resolve_route);
1972
6a3e362d
SH		 1973static void cma_set_loopback(struct sockaddr *addr)
1974{
1975 switch (addr->sa_family) {
1976 case AF_INET:
1977 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1978 break;
1979 case AF_INET6:
1980 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
1981 0, 0, 0, htonl(1));
1982 break;
1983 default:
1984 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
1985 0, 0, 0, htonl(1));
1986 break;
1987 }
1988}
1989
e51060f0
SH		 1990static int cma_bind_loopback(struct rdma_id_private *id_priv)
1991{
b0569e40 1992 struct cma_device *cma_dev, *cur_dev;
e51060f0 1993 struct ib_port_attr port_attr;
f0ee3404 1994 union ib_gid gid;
e51060f0
SH		 1995 u16 pkey;
1996 int ret;
1997 u8 p;
1998
b0569e40 1999 cma_dev = NULL;
e51060f0 2000 mutex_lock(&lock);
b0569e40
SH		 2001 list_for_each_entry(cur_dev, &dev_list, list) {
2002 if (cma_family(id_priv) == AF_IB &&
2003 rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
2004 continue;
2005
2006 if (!cma_dev)
2007 cma_dev = cur_dev;
2008
2009 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2010 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2011 port_attr.state == IB_PORT_ACTIVE) {
2012 cma_dev = cur_dev;
2013 goto port_found;
2014 }
2015 }
2016 }
2017
2018 if (!cma_dev) {
e82153b5
KK		 2019 ret = -ENODEV;
2020 goto out;
2021 }
e51060f0 2022
e82153b5 2023 p = 1;
e51060f0
SH		 2024
2025port_found:
f0ee3404 2026 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 2027 if (ret)
2028 goto out;
2029
2030 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2031 if (ret)
2032 goto out;
2033
6f8372b6 2034 id_priv->id.route.addr.dev_addr.dev_type =
3c86aa70 2035 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
6f8372b6
SH		 2036 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2037
2038 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 2039 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2040 id_priv->id.port_num = p;
2041 cma_attach_to_dev(id_priv, cma_dev);
f4753834 2042 cma_set_loopback(cma_src_addr(id_priv));
e51060f0
SH		 2043out:
2044 mutex_unlock(&lock);
2045 return ret;
2046}
2047
2048static void addr_handler(int status, struct sockaddr *src_addr,
2049 struct rdma_dev_addr *dev_addr, void *context)
2050{
2051 struct rdma_id_private *id_priv = context;
a1b1b61f 2052 struct rdma_cm_event event;
e51060f0 2053
a1b1b61f 2054 memset(&event, 0, sizeof event);
de910bd9 2055 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2056 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2057 RDMA_CM_ADDR_RESOLVED))
61a73c70 2058 goto out;
61a73c70
SH		 2059
2060 if (!status && !id_priv->cma_dev)
e51060f0
SH		 2061 status = cma_acquire_dev(id_priv);
2062
2063 if (status) {
550e5ca7
NM		 2064 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2065 RDMA_CM_ADDR_BOUND))
e51060f0 2066 goto out;
a1b1b61f
SH		 2067 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2068 event.status = status;
e51060f0 2069 } else {
f4753834 2070 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
a1b1b61f 2071 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 2072 }
2073
a1b1b61f 2074 if (id_priv->id.event_handler(&id_priv->id, &event)) {
550e5ca7 2075 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2076 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2077 cma_deref_id(id_priv);
2078 rdma_destroy_id(&id_priv->id);
2079 return;
2080 }
2081out:
de910bd9 2082 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2083 cma_deref_id(id_priv);
2084}
2085
2086static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2087{
2088 struct cma_work *work;
f0ee3404 2089 union ib_gid gid;
e51060f0
SH		 2090 int ret;
2091
2092 work = kzalloc(sizeof *work, GFP_KERNEL);
2093 if (!work)
2094 return -ENOMEM;
2095
2096 if (!id_priv->cma_dev) {
2097 ret = cma_bind_loopback(id_priv);
2098 if (ret)
2099 goto err;
2100 }
2101
6f8372b6
SH		 2102 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2103 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2104
e51060f0 2105 work->id = id_priv;
c4028958 2106 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2107 work->old_state = RDMA_CM_ADDR_QUERY;
2108 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0
SH		 2109 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2110 queue_work(cma_wq, &work->work);
2111 return 0;
2112err:
2113 kfree(work);
2114 return ret;
2115}
2116
f17df3b0
SH		 2117static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2118{
2119 struct cma_work *work;
2120 int ret;
2121
2122 work = kzalloc(sizeof *work, GFP_KERNEL);
2123 if (!work)
2124 return -ENOMEM;
2125
2126 if (!id_priv->cma_dev) {
2127 ret = cma_resolve_ib_dev(id_priv);
2128 if (ret)
2129 goto err;
2130 }
2131
2132 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2133 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2134
2135 work->id = id_priv;
2136 INIT_WORK(&work->work, cma_work_handler);
2137 work->old_state = RDMA_CM_ADDR_QUERY;
2138 work->new_state = RDMA_CM_ADDR_RESOLVED;
2139 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2140 queue_work(cma_wq, &work->work);
2141 return 0;
2142err:
2143 kfree(work);
2144 return ret;
2145}
2146
e51060f0
SH		 2147static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2148 struct sockaddr *dst_addr)
2149{
d14714df
SH		 2150 if (!src_addr || !src_addr->sa_family) {
2151 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
f17df3b0
SH		 2152 src_addr->sa_family = dst_addr->sa_family;
2153 if (dst_addr->sa_family == AF_INET6) {
d14714df
SH		 2154 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2155 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
f17df3b0
SH		 2156 } else if (dst_addr->sa_family == AF_IB) {
2157 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2158 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
d14714df
SH		 2159 }
2160 }
2161 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2162}
2163
2164int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2165 struct sockaddr *dst_addr, int timeout_ms)
2166{
2167 struct rdma_id_private *id_priv;
2168 int ret;
2169
2170 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2171 if (id_priv->state == RDMA_CM_IDLE) {
e51060f0
SH		 2172 ret = cma_bind_addr(id, src_addr, dst_addr);
2173 if (ret)
2174 return ret;
2175 }
2176
4ae7152e
SH		 2177 if (cma_family(id_priv) != dst_addr->sa_family)
2178 return -EINVAL;
2179
550e5ca7 2180 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
e51060f0
SH		 2181 return -EINVAL;
2182
2183 atomic_inc(&id_priv->refcount);
f4753834 2184 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
f17df3b0 2185 if (cma_any_addr(dst_addr)) {
e51060f0 2186 ret = cma_resolve_loopback(id_priv);
f17df3b0
SH		 2187 } else {
2188 if (dst_addr->sa_family == AF_IB) {
2189 ret = cma_resolve_ib_addr(id_priv);
2190 } else {
2191 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2192 dst_addr, &id->route.addr.dev_addr,
2193 timeout_ms, addr_handler, id_priv);
2194 }
2195 }
e51060f0
SH		 2196 if (ret)
2197 goto err;
2198
2199 return 0;
2200err:
550e5ca7 2201 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 2202 cma_deref_id(id_priv);
2203 return ret;
2204}
2205EXPORT_SYMBOL(rdma_resolve_addr);
2206
a9bb7912
HS		 2207int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2208{
2209 struct rdma_id_private *id_priv;
2210 unsigned long flags;
2211 int ret;
2212
2213 id_priv = container_of(id, struct rdma_id_private, id);
2214 spin_lock_irqsave(&id_priv->lock, flags);
c8dea2f9 2215 if (reuse || id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 2216 id_priv->reuseaddr = reuse;
2217 ret = 0;
2218 } else {
2219 ret = -EINVAL;
2220 }
2221 spin_unlock_irqrestore(&id_priv->lock, flags);
2222 return ret;
2223}
2224EXPORT_SYMBOL(rdma_set_reuseaddr);
2225
68602120
SH		 2226int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2227{
2228 struct rdma_id_private *id_priv;
2229 unsigned long flags;
2230 int ret;
2231
2232 id_priv = container_of(id, struct rdma_id_private, id);
2233 spin_lock_irqsave(&id_priv->lock, flags);
2234 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2235 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2236 id_priv->afonly = afonly;
2237 ret = 0;
2238 } else {
2239 ret = -EINVAL;
2240 }
2241 spin_unlock_irqrestore(&id_priv->lock, flags);
2242 return ret;
2243}
2244EXPORT_SYMBOL(rdma_set_afonly);
2245
e51060f0
SH		 2246static void cma_bind_port(struct rdma_bind_list *bind_list,
2247 struct rdma_id_private *id_priv)
2248{
58afdcb7
SH		 2249 struct sockaddr *addr;
2250 struct sockaddr_ib *sib;
2251 u64 sid, mask;
2252 __be16 port;
e51060f0 2253
f4753834 2254 addr = cma_src_addr(id_priv);
58afdcb7
SH		 2255 port = htons(bind_list->port);
2256
2257 switch (addr->sa_family) {
2258 case AF_INET:
2259 ((struct sockaddr_in *) addr)->sin_port = port;
2260 break;
2261 case AF_INET6:
2262 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2263 break;
2264 case AF_IB:
2265 sib = (struct sockaddr_ib *) addr;
2266 sid = be64_to_cpu(sib->sib_sid);
2267 mask = be64_to_cpu(sib->sib_sid_mask);
2268 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2269 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2270 break;
2271 }
e51060f0
SH		 2272 id_priv->bind_list = bind_list;
2273 hlist_add_head(&id_priv->node, &bind_list->owners);
2274}
2275
2276static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2277 unsigned short snum)
2278{
2279 struct rdma_bind_list *bind_list;
3b069c5d 2280 int ret;
e51060f0 2281
cb164b8c 2282 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2283 if (!bind_list)
2284 return -ENOMEM;
2285
3b069c5d
TH		 2286 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2287 if (ret < 0)
2288 goto err;
aedec080
SH		 2289
2290 bind_list->ps = ps;
3b069c5d 2291 bind_list->port = (unsigned short)ret;
aedec080
SH		 2292 cma_bind_port(bind_list, id_priv);
2293 return 0;
3b069c5d 2294err:
aedec080 2295 kfree(bind_list);
3b069c5d 2296 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
aedec080 2297}
e51060f0 2298
aedec080
SH		 2299static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2300{
5d7220e8
TH		 2301 static unsigned int last_used_port;
2302 int low, high, remaining;
2303 unsigned int rover;
e51060f0 2304
227b60f5 2305 inet_get_local_port_range(&low, &high);
5d7220e8
TH		 2306 remaining = (high - low) + 1;
2307 rover = net_random() % remaining + low;
2308retry:
2309 if (last_used_port != rover &&
2310 !idr_find(ps, (unsigned short) rover)) {
2311 int ret = cma_alloc_port(ps, id_priv, rover);
2312 /*
2313 * Remember previously used port number in order to avoid
2314 * re-using same port immediately after it is closed.
2315 */
2316 if (!ret)
2317 last_used_port = rover;
2318 if (ret != -EADDRNOTAVAIL)
2319 return ret;
e51060f0 2320 }
5d7220e8
TH		 2321 if (--remaining) {
2322 rover++;
2323 if ((rover < low) || (rover > high))
2324 rover = low;
2325 goto retry;
2326 }
2327 return -EADDRNOTAVAIL;
e51060f0
SH		 2328}
2329
a9bb7912
HS		 2330/*
2331 * Check that the requested port is available. This is called when trying to
2332 * bind to a specific port, or when trying to listen on a bound port. In
2333 * the latter case, the provided id_priv may already be on the bind_list, but
2334 * we still need to check that it's okay to start listening.
2335 */
2336static int cma_check_port(struct rdma_bind_list *bind_list,
2337 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 2338{
2339 struct rdma_id_private *cur_id;
43b752da 2340 struct sockaddr *addr, *cur_addr;
e51060f0 2341
f4753834 2342 addr = cma_src_addr(id_priv);
b67bfe0d 2343 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
a9bb7912
HS		 2344 if (id_priv == cur_id)
2345 continue;
3cd96564 2346
5b0ec991
SH		 2347 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2348 cur_id->reuseaddr)
2349 continue;
e51060f0 2350
f4753834 2351 cur_addr = cma_src_addr(cur_id);
5b0ec991
SH		 2352 if (id_priv->afonly && cur_id->afonly &&
2353 (addr->sa_family != cur_addr->sa_family))
2354 continue;
2355
2356 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2357 return -EADDRNOTAVAIL;
2358
2359 if (!cma_addr_cmp(addr, cur_addr))
2360 return -EADDRINUSE;
a9bb7912 2361 }
e51060f0
SH		 2362 return 0;
2363}
2364
a9bb7912
HS		 2365static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2366{
2367 struct rdma_bind_list *bind_list;
2368 unsigned short snum;
2369 int ret;
2370
f4753834 2371 snum = ntohs(cma_port(cma_src_addr(id_priv)));
a9bb7912
HS		 2372 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2373 return -EACCES;
2374
2375 bind_list = idr_find(ps, snum);
2376 if (!bind_list) {
2377 ret = cma_alloc_port(ps, id_priv, snum);
2378 } else {
2379 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2380 if (!ret)
2381 cma_bind_port(bind_list, id_priv);
2382 }
2383 return ret;
2384}
2385
2386static int cma_bind_listen(struct rdma_id_private *id_priv)
2387{
2388 struct rdma_bind_list *bind_list = id_priv->bind_list;
2389 int ret = 0;
2390
2391 mutex_lock(&lock);
2392 if (bind_list->owners.first->next)
2393 ret = cma_check_port(bind_list, id_priv, 0);
2394 mutex_unlock(&lock);
2395 return ret;
2396}
2397
58afdcb7 2398static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
e51060f0 2399{
e51060f0 2400 switch (id_priv->id.ps) {
e51060f0 2401 case RDMA_PS_TCP:
58afdcb7 2402 return &tcp_ps;
628e5f6d 2403 case RDMA_PS_UDP:
58afdcb7 2404 return &udp_ps;
c8f6a362 2405 case RDMA_PS_IPOIB:
58afdcb7 2406 return &ipoib_ps;
2d2e9415 2407 case RDMA_PS_IB:
58afdcb7 2408 return &ib_ps;
e51060f0 2409 default:
58afdcb7
SH		 2410 return NULL;
2411 }
2412}
2413
2414static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
2415{
2416 struct idr *ps = NULL;
2417 struct sockaddr_ib *sib;
2418 u64 sid_ps, mask, sid;
2419
f4753834 2420 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
58afdcb7
SH		 2421 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2422 sid = be64_to_cpu(sib->sib_sid) & mask;
2423
2424 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2425 sid_ps = RDMA_IB_IP_PS_IB;
2426 ps = &ib_ps;
2427 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2428 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2429 sid_ps = RDMA_IB_IP_PS_TCP;
2430 ps = &tcp_ps;
2431 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2432 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2433 sid_ps = RDMA_IB_IP_PS_UDP;
2434 ps = &udp_ps;
e51060f0
SH		 2435 }
2436
58afdcb7
SH		 2437 if (ps) {
2438 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2439 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2440 be64_to_cpu(sib->sib_sid_mask));
2441 }
2442 return ps;
2443}
2444
2445static int cma_get_port(struct rdma_id_private *id_priv)
2446{
2447 struct idr *ps;
2448 int ret;
2449
f4753834 2450 if (cma_family(id_priv) != AF_IB)
58afdcb7
SH		 2451 ps = cma_select_inet_ps(id_priv);
2452 else
2453 ps = cma_select_ib_ps(id_priv);
2454 if (!ps)
2455 return -EPROTONOSUPPORT;
2456
e51060f0 2457 mutex_lock(&lock);
f4753834 2458 if (cma_any_port(cma_src_addr(id_priv)))
aedec080 2459 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2460 else
2461 ret = cma_use_port(ps, id_priv);
2462 mutex_unlock(&lock);
2463
2464 return ret;
2465}
2466
d14714df
SH		 2467static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2468 struct sockaddr *addr)
2469{
d90f9b35 2470#if IS_ENABLED(CONFIG_IPV6)
d14714df
SH		 2471 struct sockaddr_in6 *sin6;
2472
2473 if (addr->sa_family != AF_INET6)
2474 return 0;
2475
2476 sin6 = (struct sockaddr_in6 *) addr;
2477 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2478 !sin6->sin6_scope_id)
2479 return -EINVAL;
2480
2481 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2482#endif
2483 return 0;
2484}
2485
a9bb7912
HS		 2486int rdma_listen(struct rdma_cm_id *id, int backlog)
2487{
2488 struct rdma_id_private *id_priv;
2489 int ret;
2490
2491 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2492 if (id_priv->state == RDMA_CM_IDLE) {
f4753834
SH		 2493 id->route.addr.src_addr.ss_family = AF_INET;
2494 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
a9bb7912
HS		 2495 if (ret)
2496 return ret;
2497 }
2498
550e5ca7 2499 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
a9bb7912
HS		 2500 return -EINVAL;
2501
2502 if (id_priv->reuseaddr) {
2503 ret = cma_bind_listen(id_priv);
2504 if (ret)
2505 goto err;
2506 }
2507
2508 id_priv->backlog = backlog;
2509 if (id->device) {
2510 switch (rdma_node_get_transport(id->device->node_type)) {
2511 case RDMA_TRANSPORT_IB:
2512 ret = cma_ib_listen(id_priv);
2513 if (ret)
2514 goto err;
2515 break;
2516 case RDMA_TRANSPORT_IWARP:
2517 ret = cma_iw_listen(id_priv, backlog);
2518 if (ret)
2519 goto err;
2520 break;
2521 default:
2522 ret = -ENOSYS;
2523 goto err;
2524 }
2525 } else
2526 cma_listen_on_all(id_priv);
2527
2528 return 0;
2529err:
2530 id_priv->backlog = 0;
550e5ca7 2531 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 2532 return ret;
2533}
2534EXPORT_SYMBOL(rdma_listen);
2535
e51060f0
SH		 2536int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2537{
2538 struct rdma_id_private *id_priv;
2539 int ret;
2540
680f920a
SH		 2541 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2542 addr->sa_family != AF_IB)
e51060f0
SH		 2543 return -EAFNOSUPPORT;
2544
2545 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2546 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 2547 return -EINVAL;
2548
d14714df
SH		 2549 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2550 if (ret)
2551 goto err1;
2552
8523c048 2553 if (!cma_any_addr(addr)) {
680f920a 2554 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
e51060f0 2555 if (ret)
255d0c14
KK		 2556 goto err1;
2557
255d0c14 2558 ret = cma_acquire_dev(id_priv);
255d0c14
KK		 2559 if (ret)
2560 goto err1;
e51060f0
SH		 2561 }
2562
f4753834 2563 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
68602120
SH		 2564 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2565 if (addr->sa_family == AF_INET)
2566 id_priv->afonly = 1;
5b0ec991 2567#if IS_ENABLED(CONFIG_IPV6)
68602120
SH		 2568 else if (addr->sa_family == AF_INET6)
2569 id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
5b0ec991 2570#endif
68602120 2571 }
e51060f0
SH		 2572 ret = cma_get_port(id_priv);
2573 if (ret)
255d0c14 2574 goto err2;
e51060f0
SH		 2575
2576 return 0;
255d0c14 2577err2:
a396d43a
SH		 2578 if (id_priv->cma_dev)
2579 cma_release_dev(id_priv);
255d0c14 2580err1:
550e5ca7 2581 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 2582 return ret;
2583}
2584EXPORT_SYMBOL(rdma_bind_addr);
2585
f4753834 2586static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
e51060f0 2587{
e51060f0 2588 struct cma_hdr *cma_hdr;
e51060f0 2589
01602f11
SH		 2590 cma_hdr = hdr;
2591 cma_hdr->cma_version = CMA_VERSION;
f4753834 2592 if (cma_family(id_priv) == AF_INET) {
1f5175ad
AS		 2593 struct sockaddr_in *src4, *dst4;
2594
f4753834
SH		 2595 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
2596 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
1f5175ad 2597
01602f11
SH		 2598 cma_set_ip_ver(cma_hdr, 4);
2599 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2600 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2601 cma_hdr->port = src4->sin_port;
e8160e15 2602 } else if (cma_family(id_priv) == AF_INET6) {
1f5175ad
AS		 2603 struct sockaddr_in6 *src6, *dst6;
2604
f4753834
SH		 2605 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2606 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
1f5175ad 2607
01602f11
SH		 2608 cma_set_ip_ver(cma_hdr, 6);
2609 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2610 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2611 cma_hdr->port = src6->sin6_port;
e51060f0
SH		 2612 }
2613 return 0;
2614}
2615
628e5f6d
SH		 2616static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2617 struct ib_cm_event *ib_event)
2618{
2619 struct rdma_id_private *id_priv = cm_id->context;
2620 struct rdma_cm_event event;
2621 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2622 int ret = 0;
2623
550e5ca7 2624 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
8aa08602 2625 return 0;
628e5f6d 2626
8aa08602 2627 memset(&event, 0, sizeof event);
628e5f6d
SH		 2628 switch (ib_event->event) {
2629 case IB_CM_SIDR_REQ_ERROR:
2630 event.event = RDMA_CM_EVENT_UNREACHABLE;
2631 event.status = -ETIMEDOUT;
2632 break;
2633 case IB_CM_SIDR_REP_RECEIVED:
2634 event.param.ud.private_data = ib_event->private_data;
2635 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2636 if (rep->status != IB_SIDR_SUCCESS) {
2637 event.event = RDMA_CM_EVENT_UNREACHABLE;
2638 event.status = ib_event->param.sidr_rep_rcvd.status;
2639 break;
2640 }
5c438135 2641 ret = cma_set_qkey(id_priv, rep->qkey);
d2ca39f2
YE		 2642 if (ret) {
2643 event.event = RDMA_CM_EVENT_ADDR_ERROR;
5c438135 2644 event.status = ret;
628e5f6d
SH		 2645 break;
2646 }
2647 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2648 id_priv->id.route.path_rec,
2649 &event.param.ud.ah_attr);
2650 event.param.ud.qp_num = rep->qpn;
2651 event.param.ud.qkey = rep->qkey;
2652 event.event = RDMA_CM_EVENT_ESTABLISHED;
2653 event.status = 0;
2654 break;
2655 default:
468f2239 2656 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2657 ib_event->event);
2658 goto out;
2659 }
2660
2661 ret = id_priv->id.event_handler(&id_priv->id, &event);
2662 if (ret) {
2663 /* Destroy the CM ID by returning a non-zero value. */
2664 id_priv->cm_id.ib = NULL;
550e5ca7 2665 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2666 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2667 rdma_destroy_id(&id_priv->id);
2668 return ret;
2669 }
2670out:
de910bd9 2671 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2672 return ret;
2673}
2674
2675static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2676 struct rdma_conn_param *conn_param)
2677{
2678 struct ib_cm_sidr_req_param req;
0c9361fc 2679 struct ib_cm_id *id;
e511d1ae 2680 void *private_data;
e8160e15 2681 int offset, ret;
628e5f6d 2682
e511d1ae 2683 memset(&req, 0, sizeof req);
e8160e15
SH		 2684 offset = cma_user_data_offset(id_priv);
2685 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 2686 if (req.private_data_len < conn_param->private_data_len)
2687 return -EINVAL;
2688
e8160e15 2689 if (req.private_data_len) {
e511d1ae
SH		 2690 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2691 if (!private_data)
e8160e15
SH		 2692 return -ENOMEM;
2693 } else {
e511d1ae 2694 private_data = NULL;
e8160e15 2695 }
628e5f6d
SH		 2696
2697 if (conn_param->private_data && conn_param->private_data_len)
e511d1ae
SH		 2698 memcpy(private_data + offset, conn_param->private_data,
2699 conn_param->private_data_len);
628e5f6d 2700
e511d1ae
SH		 2701 if (private_data) {
2702 ret = cma_format_hdr(private_data, id_priv);
e8160e15
SH		 2703 if (ret)
2704 goto out;
e511d1ae 2705 req.private_data = private_data;
e8160e15 2706 }
628e5f6d 2707
0c9361fc
JM		 2708 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2709 id_priv);
2710 if (IS_ERR(id)) {
2711 ret = PTR_ERR(id);
628e5f6d
SH		 2712 goto out;
2713 }
0c9361fc 2714 id_priv->cm_id.ib = id;
628e5f6d 2715
f4753834 2716 req.path = id_priv->id.route.path_rec;
cf53936f 2717 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
628e5f6d
SH		 2718 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2719 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2720
2721 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2722 if (ret) {
2723 ib_destroy_cm_id(id_priv->cm_id.ib);
2724 id_priv->cm_id.ib = NULL;
2725 }
2726out:
e511d1ae 2727 kfree(private_data);
628e5f6d
SH		 2728 return ret;
2729}
2730
e51060f0
SH		 2731static int cma_connect_ib(struct rdma_id_private *id_priv,
2732 struct rdma_conn_param *conn_param)
2733{
2734 struct ib_cm_req_param req;
2735 struct rdma_route *route;
2736 void *private_data;
0c9361fc 2737 struct ib_cm_id *id;
e51060f0
SH		 2738 int offset, ret;
2739
2740 memset(&req, 0, sizeof req);
e8160e15 2741 offset = cma_user_data_offset(id_priv);
e51060f0 2742 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 2743 if (req.private_data_len < conn_param->private_data_len)
2744 return -EINVAL;
2745
e8160e15
SH		 2746 if (req.private_data_len) {
2747 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2748 if (!private_data)
2749 return -ENOMEM;
2750 } else {
2751 private_data = NULL;
2752 }
e51060f0
SH		 2753
2754 if (conn_param->private_data && conn_param->private_data_len)
2755 memcpy(private_data + offset, conn_param->private_data,
2756 conn_param->private_data_len);
2757
0c9361fc
JM		 2758 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2759 if (IS_ERR(id)) {
2760 ret = PTR_ERR(id);
e51060f0
SH		 2761 goto out;
2762 }
0c9361fc 2763 id_priv->cm_id.ib = id;
e51060f0
SH		 2764
2765 route = &id_priv->id.route;
e8160e15
SH		 2766 if (private_data) {
2767 ret = cma_format_hdr(private_data, id_priv);
2768 if (ret)
2769 goto out;
2770 req.private_data = private_data;
2771 }
e51060f0
SH		 2772
2773 req.primary_path = &route->path_rec[0];
2774 if (route->num_paths == 2)
2775 req.alternate_path = &route->path_rec[1];
2776
cf53936f 2777 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
e51060f0 2778 req.qp_num = id_priv->qp_num;
18c441a6 2779 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 2780 req.starting_psn = id_priv->seq_num;
2781 req.responder_resources = conn_param->responder_resources;
2782 req.initiator_depth = conn_param->initiator_depth;
2783 req.flow_control = conn_param->flow_control;
4ede178a
SH		 2784 req.retry_count = min_t(u8, 7, conn_param->retry_count);
2785 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 2786 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2787 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2788 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2789 req.srq = id_priv->srq ? 1 : 0;
2790
2791 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2792out:
0c9361fc
JM		 2793 if (ret && !IS_ERR(id)) {
2794 ib_destroy_cm_id(id);
675a027c
KK		 2795 id_priv->cm_id.ib = NULL;
2796 }
2797
e51060f0
SH		 2798 kfree(private_data);
2799 return ret;
2800}
2801
07ebafba
TT		 2802static int cma_connect_iw(struct rdma_id_private *id_priv,
2803 struct rdma_conn_param *conn_param)
2804{
2805 struct iw_cm_id *cm_id;
2806 struct sockaddr_in* sin;
2807 int ret;
2808 struct iw_cm_conn_param iw_param;
2809
2810 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 2811 if (IS_ERR(cm_id))
2812 return PTR_ERR(cm_id);
07ebafba
TT		 2813
2814 id_priv->cm_id.iw = cm_id;
2815
f4753834 2816 sin = (struct sockaddr_in *) cma_src_addr(id_priv);
07ebafba
TT		 2817 cm_id->local_addr = *sin;
2818
f4753834 2819 sin = (struct sockaddr_in *) cma_dst_addr(id_priv);
07ebafba
TT		 2820 cm_id->remote_addr = *sin;
2821
5851bb89 2822 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2823 if (ret)
2824 goto out;
07ebafba 2825
f45ee80e
HS		 2826 if (conn_param) {
2827 iw_param.ord = conn_param->initiator_depth;
2828 iw_param.ird = conn_param->responder_resources;
2829 iw_param.private_data = conn_param->private_data;
2830 iw_param.private_data_len = conn_param->private_data_len;
2831 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2832 } else {
2833 memset(&iw_param, 0, sizeof iw_param);
07ebafba 2834 iw_param.qpn = id_priv->qp_num;
f45ee80e 2835 }
07ebafba
TT		 2836 ret = iw_cm_connect(cm_id, &iw_param);
2837out:
0c9361fc 2838 if (ret) {
675a027c
KK		 2839 iw_destroy_cm_id(cm_id);
2840 id_priv->cm_id.iw = NULL;
2841 }
07ebafba
TT		 2842 return ret;
2843}
2844
e51060f0
SH		 2845int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2846{
2847 struct rdma_id_private *id_priv;
2848 int ret;
2849
2850 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2851 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
e51060f0
SH		 2852 return -EINVAL;
2853
2854 if (!id->qp) {
2855 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2856 id_priv->srq = conn_param->srq;
2857 }
2858
07ebafba
TT		 2859 switch (rdma_node_get_transport(id->device->node_type)) {
2860 case RDMA_TRANSPORT_IB:
b26f9b99 2861 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 2862 ret = cma_resolve_ib_udp(id_priv, conn_param);
2863 else
2864 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2865 break;
07ebafba
TT		 2866 case RDMA_TRANSPORT_IWARP:
2867 ret = cma_connect_iw(id_priv, conn_param);
2868 break;
e51060f0
SH		 2869 default:
2870 ret = -ENOSYS;
2871 break;
2872 }
2873 if (ret)
2874 goto err;
2875
2876 return 0;
2877err:
550e5ca7 2878 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
e51060f0
SH		 2879 return ret;
2880}
2881EXPORT_SYMBOL(rdma_connect);
2882
2883static int cma_accept_ib(struct rdma_id_private *id_priv,
2884 struct rdma_conn_param *conn_param)
2885{
2886 struct ib_cm_rep_param rep;
5851bb89 2887 int ret;
0fe313b0 2888
5851bb89
SH		 2889 ret = cma_modify_qp_rtr(id_priv, conn_param);
2890 if (ret)
2891 goto out;
0fe313b0 2892
5851bb89
SH		 2893 ret = cma_modify_qp_rts(id_priv, conn_param);
2894 if (ret)
2895 goto out;
e51060f0
SH		 2896
2897 memset(&rep, 0, sizeof rep);
2898 rep.qp_num = id_priv->qp_num;
2899 rep.starting_psn = id_priv->seq_num;
2900 rep.private_data = conn_param->private_data;
2901 rep.private_data_len = conn_param->private_data_len;
2902 rep.responder_resources = conn_param->responder_resources;
2903 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2904 rep.failover_accepted = 0;
2905 rep.flow_control = conn_param->flow_control;
4ede178a 2906 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 2907 rep.srq = id_priv->srq ? 1 : 0;
2908
0fe313b0
SH		 2909 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2910out:
2911 return ret;
e51060f0
SH		 2912}
2913
07ebafba
TT		 2914static int cma_accept_iw(struct rdma_id_private *id_priv,
2915 struct rdma_conn_param *conn_param)
2916{
2917 struct iw_cm_conn_param iw_param;
2918 int ret;
2919
5851bb89 2920 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2921 if (ret)
2922 return ret;
2923
2924 iw_param.ord = conn_param->initiator_depth;
2925 iw_param.ird = conn_param->responder_resources;
2926 iw_param.private_data = conn_param->private_data;
2927 iw_param.private_data_len = conn_param->private_data_len;
2928 if (id_priv->id.qp) {
2929 iw_param.qpn = id_priv->qp_num;
2930 } else
2931 iw_param.qpn = conn_param->qp_num;
2932
2933 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2934}
2935
628e5f6d 2936static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
5c438135 2937 enum ib_cm_sidr_status status, u32 qkey,
628e5f6d
SH		 2938 const void *private_data, int private_data_len)
2939{
2940 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2941 int ret;
628e5f6d
SH		 2942
2943 memset(&rep, 0, sizeof rep);
2944 rep.status = status;
2945 if (status == IB_SIDR_SUCCESS) {
5c438135 2946 ret = cma_set_qkey(id_priv, qkey);
d2ca39f2
YE		 2947 if (ret)
2948 return ret;
628e5f6d 2949 rep.qp_num = id_priv->qp_num;
c8f6a362 2950 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2951 }
2952 rep.private_data = private_data;
2953 rep.private_data_len = private_data_len;
2954
2955 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2956}
2957
e51060f0
SH		 2958int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2959{
2960 struct rdma_id_private *id_priv;
2961 int ret;
2962
2963 id_priv = container_of(id, struct rdma_id_private, id);
83e9502d
NM		 2964
2965 id_priv->owner = task_pid_nr(current);
2966
550e5ca7 2967 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
e51060f0
SH		 2968 return -EINVAL;
2969
2970 if (!id->qp && conn_param) {
2971 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2972 id_priv->srq = conn_param->srq;
2973 }
2974
07ebafba
TT		 2975 switch (rdma_node_get_transport(id->device->node_type)) {
2976 case RDMA_TRANSPORT_IB:
f45ee80e
HS		 2977 if (id->qp_type == IB_QPT_UD) {
2978 if (conn_param)
2979 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 2980 conn_param->qkey,
f45ee80e
HS		 2981 conn_param->private_data,
2982 conn_param->private_data_len);
2983 else
2984 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 2985 0, NULL, 0);
f45ee80e
HS		 2986 } else {
2987 if (conn_param)
2988 ret = cma_accept_ib(id_priv, conn_param);
2989 else
2990 ret = cma_rep_recv(id_priv);
2991 }
e51060f0 2992 break;
07ebafba
TT		 2993 case RDMA_TRANSPORT_IWARP:
2994 ret = cma_accept_iw(id_priv, conn_param);
2995 break;
e51060f0
SH		 2996 default:
2997 ret = -ENOSYS;
2998 break;
2999 }
3000
3001 if (ret)
3002 goto reject;
3003
3004 return 0;
3005reject:
c5483388 3006 cma_modify_qp_err(id_priv);
e51060f0
SH		 3007 rdma_reject(id, NULL, 0);
3008 return ret;
3009}
3010EXPORT_SYMBOL(rdma_accept);
3011
0fe313b0
SH		 3012int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3013{
3014 struct rdma_id_private *id_priv;
3015 int ret;
3016
3017 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3018 if (!id_priv->cm_id.ib)
0fe313b0
SH		 3019 return -EINVAL;
3020
3021 switch (id->device->node_type) {
3022 case RDMA_NODE_IB_CA:
3023 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3024 break;
3025 default:
3026 ret = 0;
3027 break;
3028 }
3029 return ret;
3030}
3031EXPORT_SYMBOL(rdma_notify);
3032
e51060f0
SH		 3033int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3034 u8 private_data_len)
3035{
3036 struct rdma_id_private *id_priv;
3037 int ret;
3038
3039 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3040 if (!id_priv->cm_id.ib)
e51060f0
SH		 3041 return -EINVAL;
3042
07ebafba
TT		 3043 switch (rdma_node_get_transport(id->device->node_type)) {
3044 case RDMA_TRANSPORT_IB:
b26f9b99 3045 if (id->qp_type == IB_QPT_UD)
5c438135 3046 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
628e5f6d
SH		 3047 private_data, private_data_len);
3048 else
3049 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3050 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3051 0, private_data, private_data_len);
e51060f0 3052 break;
07ebafba
TT		 3053 case RDMA_TRANSPORT_IWARP:
3054 ret = iw_cm_reject(id_priv->cm_id.iw,
3055 private_data, private_data_len);
3056 break;
e51060f0
SH		 3057 default:
3058 ret = -ENOSYS;
3059 break;
3060 }
3061 return ret;
3062}
3063EXPORT_SYMBOL(rdma_reject);
3064
3065int rdma_disconnect(struct rdma_cm_id *id)
3066{
3067 struct rdma_id_private *id_priv;
3068 int ret;
3069
3070 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3071 if (!id_priv->cm_id.ib)
e51060f0
SH		 3072 return -EINVAL;
3073
07ebafba
TT		 3074 switch (rdma_node_get_transport(id->device->node_type)) {
3075 case RDMA_TRANSPORT_IB:
c5483388 3076 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 3077 if (ret)
3078 goto out;
e51060f0
SH		 3079 /* Initiate or respond to a disconnect. */
3080 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3081 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3082 break;
07ebafba
TT		 3083 case RDMA_TRANSPORT_IWARP:
3084 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3085 break;
e51060f0 3086 default:
07ebafba 3087 ret = -EINVAL;
e51060f0
SH		 3088 break;
3089 }
3090out:
3091 return ret;
3092}
3093EXPORT_SYMBOL(rdma_disconnect);
3094
c8f6a362
SH		 3095static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3096{
3097 struct rdma_id_private *id_priv;
3098 struct cma_multicast *mc = multicast->context;
3099 struct rdma_cm_event event;
3100 int ret;
3101
3102 id_priv = mc->id_priv;
550e5ca7
NM		 3103 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3104 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
8aa08602 3105 return 0;
c8f6a362 3106
5c438135
SH		 3107 if (!status)
3108 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
c5483388 3109 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 3110 if (!status && id_priv->id.qp)
3111 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
46ea5061 3112 be16_to_cpu(multicast->rec.mlid));
c5483388 3113 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 3114
3115 memset(&event, 0, sizeof event);
3116 event.status = status;
3117 event.param.ud.private_data = mc->context;
3118 if (!status) {
3119 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3120 ib_init_ah_from_mcmember(id_priv->id.device,
3121 id_priv->id.port_num, &multicast->rec,
3122 &event.param.ud.ah_attr);
3123 event.param.ud.qp_num = 0xFFFFFF;
3124 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3125 } else
3126 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3127
3128 ret = id_priv->id.event_handler(&id_priv->id, &event);
3129 if (ret) {
550e5ca7 3130 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 3131 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3132 rdma_destroy_id(&id_priv->id);
3133 return 0;
3134 }
8aa08602 3135
de910bd9 3136 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3137 return 0;
3138}
3139
3140static void cma_set_mgid(struct rdma_id_private *id_priv,
3141 struct sockaddr *addr, union ib_gid *mgid)
3142{
3143 unsigned char mc_map[MAX_ADDR_LEN];
3144 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3145 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3146 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3147
3148 if (cma_any_addr(addr)) {
3149 memset(mgid, 0, sizeof *mgid);
3150 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 3151 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 3152 0xFF10A01B)) {
3153 /* IPv6 address is an SA assigned MGID. */
3154 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
5bc2b7b3
SH		 3155 } else if (addr->sa_family == AF_IB) {
3156 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
e2e62697
JG		 3157 } else if ((addr->sa_family == AF_INET6)) {
3158 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3159 if (id_priv->id.ps == RDMA_PS_UDP)
3160 mc_map[7] = 0x01; /* Use RDMA CM signature */
3161 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 3162 } else {
a9e527e3 3163 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 3164 if (id_priv->id.ps == RDMA_PS_UDP)
3165 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 3166 *mgid = *(union ib_gid *) (mc_map + 4);
3167 }
3168}
3169
3170static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3171 struct cma_multicast *mc)
3172{
3173 struct ib_sa_mcmember_rec rec;
3174 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3175 ib_sa_comp_mask comp_mask;
3176 int ret;
3177
3178 ib_addr_get_mgid(dev_addr, &rec.mgid);
3179 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3180 &rec.mgid, &rec);
3181 if (ret)
3182 return ret;
3183
5bc2b7b3
SH		 3184 ret = cma_set_qkey(id_priv, 0);
3185 if (ret)
3186 return ret;
3187
3f446754 3188 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
5bc2b7b3 3189 rec.qkey = cpu_to_be32(id_priv->qkey);
6f8372b6 3190 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 3191 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3192 rec.join_state = 1;
3193
3194 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3195 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3196 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3197 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3198 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3199
84adeee9
YE		 3200 if (id_priv->id.ps == RDMA_PS_IPOIB)
3201 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2a22fb8c
DB		 3202 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3203 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3204 IB_SA_MCMEMBER_REC_MTU |
3205 IB_SA_MCMEMBER_REC_HOP_LIMIT;
84adeee9 3206
c8f6a362
SH		 3207 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3208 id_priv->id.port_num, &rec,
3209 comp_mask, GFP_KERNEL,
3210 cma_ib_mc_handler, mc);
4e289045 3211 return PTR_RET(mc->multicast.ib);
c8f6a362
SH		 3212}
3213
3c86aa70
EC		 3214static void iboe_mcast_work_handler(struct work_struct *work)
3215{
3216 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3217 struct cma_multicast *mc = mw->mc;
3218 struct ib_sa_multicast *m = mc->multicast.ib;
3219
3220 mc->multicast.ib->context = mc;
3221 cma_ib_mc_handler(0, m);
3222 kref_put(&mc->mcref, release_mc);
3223 kfree(mw);
3224}
3225
3226static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3227{
3228 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3229 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3230
3231 if (cma_any_addr(addr)) {
3232 memset(mgid, 0, sizeof *mgid);
3233 } else if (addr->sa_family == AF_INET6) {
3234 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3235 } else {
3236 mgid->raw[0] = 0xff;
3237 mgid->raw[1] = 0x0e;
3238 mgid->raw[2] = 0;
3239 mgid->raw[3] = 0;
3240 mgid->raw[4] = 0;
3241 mgid->raw[5] = 0;
3242 mgid->raw[6] = 0;
3243 mgid->raw[7] = 0;
3244 mgid->raw[8] = 0;
3245 mgid->raw[9] = 0;
3246 mgid->raw[10] = 0xff;
3247 mgid->raw[11] = 0xff;
3248 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3249 }
3250}
3251
3252static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3253 struct cma_multicast *mc)
3254{
3255 struct iboe_mcast_work *work;
3256 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3257 int err;
3258 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3259 struct net_device *ndev = NULL;
3260
3261 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3262 return -EINVAL;
3263
3264 work = kzalloc(sizeof *work, GFP_KERNEL);
3265 if (!work)
3266 return -ENOMEM;
3267
3268 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3269 if (!mc->multicast.ib) {
3270 err = -ENOMEM;
3271 goto out1;
3272 }
3273
3274 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3275
3276 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3277 if (id_priv->id.ps == RDMA_PS_UDP)
3278 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3279
3280 if (dev_addr->bound_dev_if)
3281 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3282 if (!ndev) {
3283 err = -ENODEV;
3284 goto out2;
3285 }
3286 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3287 mc->multicast.ib->rec.hop_limit = 1;
3288 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3289 dev_put(ndev);
3290 if (!mc->multicast.ib->rec.mtu) {
3291 err = -EINVAL;
3292 goto out2;
3293 }
3294 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3295 work->id = id_priv;
3296 work->mc = mc;
3297 INIT_WORK(&work->work, iboe_mcast_work_handler);
3298 kref_get(&mc->mcref);
3299 queue_work(cma_wq, &work->work);
3300
3301 return 0;
3302
3303out2:
3304 kfree(mc->multicast.ib);
3305out1:
3306 kfree(work);
3307 return err;
3308}
3309
c8f6a362
SH		 3310int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3311 void *context)
3312{
3313 struct rdma_id_private *id_priv;
3314 struct cma_multicast *mc;
3315 int ret;
3316
3317 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 3318 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3319 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 3320 return -EINVAL;
3321
3322 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3323 if (!mc)
3324 return -ENOMEM;
3325
ef560861 3326 memcpy(&mc->addr, addr, rdma_addr_size(addr));
c8f6a362
SH		 3327 mc->context = context;
3328 mc->id_priv = id_priv;
3329
3330 spin_lock(&id_priv->lock);
3331 list_add(&mc->list, &id_priv->mc_list);
3332 spin_unlock(&id_priv->lock);
3333
3334 switch (rdma_node_get_transport(id->device->node_type)) {
3335 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 3336 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3337 case IB_LINK_LAYER_INFINIBAND:
3338 ret = cma_join_ib_multicast(id_priv, mc);
3339 break;
3340 case IB_LINK_LAYER_ETHERNET:
3341 kref_init(&mc->mcref);
3342 ret = cma_iboe_join_multicast(id_priv, mc);
3343 break;
3344 default:
3345 ret = -EINVAL;
3346 }
c8f6a362
SH		 3347 break;
3348 default:
3349 ret = -ENOSYS;
3350 break;
3351 }
3352
3353 if (ret) {
3354 spin_lock_irq(&id_priv->lock);
3355 list_del(&mc->list);
3356 spin_unlock_irq(&id_priv->lock);
3357 kfree(mc);
3358 }
3359 return ret;
3360}
3361EXPORT_SYMBOL(rdma_join_multicast);
3362
3363void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3364{
3365 struct rdma_id_private *id_priv;
3366 struct cma_multicast *mc;
3367
3368 id_priv = container_of(id, struct rdma_id_private, id);
3369 spin_lock_irq(&id_priv->lock);
3370 list_for_each_entry(mc, &id_priv->mc_list, list) {
ef560861 3371 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
c8f6a362
SH		 3372 list_del(&mc->list);
3373 spin_unlock_irq(&id_priv->lock);
3374
3375 if (id->qp)
3376 ib_detach_mcast(id->qp,
3377 &mc->multicast.ib->rec.mgid,
46ea5061 3378 be16_to_cpu(mc->multicast.ib->rec.mlid));
3c86aa70
EC		 3379 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3380 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3381 case IB_LINK_LAYER_INFINIBAND:
3382 ib_sa_free_multicast(mc->multicast.ib);
3383 kfree(mc);
3384 break;
3385 case IB_LINK_LAYER_ETHERNET:
3386 kref_put(&mc->mcref, release_mc);
3387 break;
3388 default:
3389 break;
3390 }
3391 }
c8f6a362
SH		 3392 return;
3393 }
3394 }
3395 spin_unlock_irq(&id_priv->lock);
3396}
3397EXPORT_SYMBOL(rdma_leave_multicast);
3398
dd5bdff8
OG		 3399static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3400{
3401 struct rdma_dev_addr *dev_addr;
3402 struct cma_ndev_work *work;
3403
3404 dev_addr = &id_priv->id.route.addr.dev_addr;
3405
6266ed6e 3406 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 3407 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3408 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3409 ndev->name, &id_priv->id);
3410 work = kzalloc(sizeof *work, GFP_KERNEL);
3411 if (!work)
3412 return -ENOMEM;
3413
3414 INIT_WORK(&work->work, cma_ndev_work_handler);
3415 work->id = id_priv;
3416 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3417 atomic_inc(&id_priv->refcount);
3418 queue_work(cma_wq, &work->work);
3419 }
3420
3421 return 0;
3422}
3423
3424static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
351638e7 3425 void *ptr)
dd5bdff8 3426{
351638e7 3427 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
dd5bdff8
OG		 3428 struct cma_device *cma_dev;
3429 struct rdma_id_private *id_priv;
3430 int ret = NOTIFY_DONE;
3431
3432 if (dev_net(ndev) != &init_net)
3433 return NOTIFY_DONE;
3434
3435 if (event != NETDEV_BONDING_FAILOVER)
3436 return NOTIFY_DONE;
3437
3438 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3439 return NOTIFY_DONE;
3440
3441 mutex_lock(&lock);
3442 list_for_each_entry(cma_dev, &dev_list, list)
3443 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3444 ret = cma_netdev_change(ndev, id_priv);
3445 if (ret)
3446 goto out;
3447 }
3448
3449out:
3450 mutex_unlock(&lock);
3451 return ret;
3452}
3453
3454static struct notifier_block cma_nb = {
3455 .notifier_call = cma_netdev_callback
3456};
3457
e51060f0
SH		 3458static void cma_add_one(struct ib_device *device)
3459{
3460 struct cma_device *cma_dev;
3461 struct rdma_id_private *id_priv;
3462
3463 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3464 if (!cma_dev)
3465 return;
3466
3467 cma_dev->device = device;
e51060f0
SH		 3468
3469 init_completion(&cma_dev->comp);
3470 atomic_set(&cma_dev->refcount, 1);
3471 INIT_LIST_HEAD(&cma_dev->id_list);
3472 ib_set_client_data(device, &cma_client, cma_dev);
3473
3474 mutex_lock(&lock);
3475 list_add_tail(&cma_dev->list, &dev_list);
3476 list_for_each_entry(id_priv, &listen_any_list, list)
3477 cma_listen_on_dev(id_priv, cma_dev);
3478 mutex_unlock(&lock);
e51060f0
SH		 3479}
3480
3481static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3482{
a1b1b61f 3483 struct rdma_cm_event event;
550e5ca7 3484 enum rdma_cm_state state;
de910bd9 3485 int ret = 0;
e51060f0
SH		 3486
3487 /* Record that we want to remove the device */
550e5ca7
NM		 3488 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3489 if (state == RDMA_CM_DESTROYING)
e51060f0
SH		 3490 return 0;
3491
3492 cma_cancel_operation(id_priv, state);
de910bd9 3493 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 3494
3495 /* Check for destruction from another callback. */
550e5ca7 3496 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
de910bd9 3497 goto out;
e51060f0 3498
a1b1b61f
SH		 3499 memset(&event, 0, sizeof event);
3500 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 3501 ret = id_priv->id.event_handler(&id_priv->id, &event);
3502out:
3503 mutex_unlock(&id_priv->handler_mutex);
3504 return ret;
e51060f0
SH		 3505}
3506
3507static void cma_process_remove(struct cma_device *cma_dev)
3508{
e51060f0
SH		 3509 struct rdma_id_private *id_priv;
3510 int ret;
3511
e51060f0
SH		 3512 mutex_lock(&lock);
3513 while (!list_empty(&cma_dev->id_list)) {
3514 id_priv = list_entry(cma_dev->id_list.next,
3515 struct rdma_id_private, list);
3516
d02d1f53 3517 list_del(&id_priv->listen_list);
94de178a 3518 list_del_init(&id_priv->list);
e51060f0
SH		 3519 atomic_inc(&id_priv->refcount);
3520 mutex_unlock(&lock);
3521
d02d1f53 3522 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 3523 cma_deref_id(id_priv);
3524 if (ret)
3525 rdma_destroy_id(&id_priv->id);
3526
3527 mutex_lock(&lock);
3528 }
3529 mutex_unlock(&lock);
3530
3531 cma_deref_dev(cma_dev);
3532 wait_for_completion(&cma_dev->comp);
3533}
3534
3535static void cma_remove_one(struct ib_device *device)
3536{
3537 struct cma_device *cma_dev;
3538
3539 cma_dev = ib_get_client_data(device, &cma_client);
3540 if (!cma_dev)
3541 return;
3542
3543 mutex_lock(&lock);
3544 list_del(&cma_dev->list);
3545 mutex_unlock(&lock);
3546
3547 cma_process_remove(cma_dev);
3548 kfree(cma_dev);
3549}
3550
753f618a
NM		 3551static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3552{
3553 struct nlmsghdr *nlh;
3554 struct rdma_cm_id_stats *id_stats;
3555 struct rdma_id_private *id_priv;
3556 struct rdma_cm_id *id = NULL;
3557 struct cma_device *cma_dev;
3558 int i_dev = 0, i_id = 0;
3559
3560 /*
3561 * We export all of the IDs as a sequence of messages. Each
3562 * ID gets its own netlink message.
3563 */
3564 mutex_lock(&lock);
3565
3566 list_for_each_entry(cma_dev, &dev_list, list) {
3567 if (i_dev < cb->args[0]) {
3568 i_dev++;
3569 continue;
3570 }
3571
3572 i_id = 0;
3573 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3574 if (i_id < cb->args[1]) {
3575 i_id++;
3576 continue;
3577 }
3578
3579 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3580 sizeof *id_stats, RDMA_NL_RDMA_CM,
3581 RDMA_NL_RDMA_CM_ID_STATS);
3582 if (!id_stats)
3583 goto out;
3584
3585 memset(id_stats, 0, sizeof *id_stats);
3586 id = &id_priv->id;
3587 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3588 id_stats->port_num = id->port_num;
3589 id_stats->bound_dev_if =
3590 id->route.addr.dev_addr.bound_dev_if;
3591
ce117ffa
SH		 3592 if (ibnl_put_attr(skb, nlh,
3593 rdma_addr_size(cma_src_addr(id_priv)),
3594 cma_src_addr(id_priv),
3595 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3596 goto out;
3597 if (ibnl_put_attr(skb, nlh,
3598 rdma_addr_size(cma_src_addr(id_priv)),
3599 cma_dst_addr(id_priv),
3600 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3601 goto out;
753f618a 3602
83e9502d 3603 id_stats->pid = id_priv->owner;
753f618a
NM		 3604 id_stats->port_space = id->ps;
3605 id_stats->cm_state = id_priv->state;
3606 id_stats->qp_num = id_priv->qp_num;
3607 id_stats->qp_type = id->qp_type;
3608
3609 i_id++;
3610 }
3611
3612 cb->args[1] = 0;
3613 i_dev++;
3614 }
3615
3616out:
3617 mutex_unlock(&lock);
3618 cb->args[0] = i_dev;
3619 cb->args[1] = i_id;
3620
3621 return skb->len;
3622}
3623
3624static const struct ibnl_client_cbs cma_cb_table[] = {
809d5fc9
G		 3625 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3626 .module = THIS_MODULE },
753f618a
NM		 3627};
3628
716abb1f 3629static int __init cma_init(void)
e51060f0 3630{
5d7220e8 3631 int ret;
227b60f5 3632
c7f743a6 3633 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 3634 if (!cma_wq)
3635 return -ENOMEM;
3636
c1a0b23b 3637 ib_sa_register_client(&sa_client);
7a118df3 3638 rdma_addr_register_client(&addr_client);
dd5bdff8 3639 register_netdevice_notifier(&cma_nb);
c1a0b23b 3640
e51060f0
SH		 3641 ret = ib_register_client(&cma_client);
3642 if (ret)
3643 goto err;
753f618a
NM		 3644
3645 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3646 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3647
e51060f0
SH		 3648 return 0;
3649
3650err:
dd5bdff8 3651 unregister_netdevice_notifier(&cma_nb);
7a118df3 3652 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3653 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3654 destroy_workqueue(cma_wq);
3655 return ret;
3656}
3657
716abb1f 3658static void __exit cma_cleanup(void)
e51060f0 3659{
753f618a 3660 ibnl_remove_client(RDMA_NL_RDMA_CM);
e51060f0 3661 ib_unregister_client(&cma_client);
dd5bdff8 3662 unregister_netdevice_notifier(&cma_nb);
7a118df3 3663 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3664 ib_sa_unregister_client(&sa_client);
e51060f0 3665 destroy_workqueue(cma_wq);
e51060f0 3666 idr_destroy(&tcp_ps);
628e5f6d 3667 idr_destroy(&udp_ps);
c8f6a362 3668 idr_destroy(&ipoib_ps);
2d2e9415 3669 idr_destroy(&ib_ps);
e51060f0
SH		 3670}
3671
3672module_init(cma_init);
3673module_exit(cma_cleanup);
Linux kernel - Deliverables
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