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