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Merge branch 'x86/ras' into x86/core, to fix conflicts
[deliverable/linux.git] / drivers / infiniband / core / cma.c
CommitLineData
e51060f0
SH		 1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
a9474917
SH		 7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
e51060f0 12 *
a9474917
SH		 13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
e51060f0 16 *
a9474917
SH		 17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
e51060f0 20 *
a9474917
SH		 21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
e51060f0 25 *
a9474917
SH		 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
e51060f0
SH		 34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/idr.h>
07ebafba 42#include <linux/inetdevice.h>
5a0e3ad6 43#include <linux/slab.h>
e4dd23d7 44#include <linux/module.h>
366cddb4 45#include <net/route.h>
e51060f0
SH		 46
47#include <net/tcp.h>
1f5175ad 48#include <net/ipv6.h>
e51060f0
SH		 49
50#include <rdma/rdma_cm.h>
51#include <rdma/rdma_cm_ib.h>
753f618a 52#include <rdma/rdma_netlink.h>
2e2d190c 53#include <rdma/ib.h>
e51060f0
SH		 54#include <rdma/ib_cache.h>
55#include <rdma/ib_cm.h>
56#include <rdma/ib_sa.h>
07ebafba 57#include <rdma/iw_cm.h>
e51060f0
SH		 58
59MODULE_AUTHOR("Sean Hefty");
60MODULE_DESCRIPTION("Generic RDMA CM Agent");
61MODULE_LICENSE("Dual BSD/GPL");
62
63#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 64#define CMA_MAX_CM_RETRIES 15
dcb3f974 65#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 66#define CMA_IBOE_PACKET_LIFETIME 18
e51060f0
SH		 67
68static void cma_add_one(struct ib_device *device);
69static void cma_remove_one(struct ib_device *device);
70
71static struct ib_client cma_client = {
72 .name = "cma",
73 .add = cma_add_one,
74 .remove = cma_remove_one
75};
76
c1a0b23b 77static struct ib_sa_client sa_client;
7a118df3 78static struct rdma_addr_client addr_client;
e51060f0
SH		 79static LIST_HEAD(dev_list);
80static LIST_HEAD(listen_any_list);
81static DEFINE_MUTEX(lock);
82static struct workqueue_struct *cma_wq;
e51060f0 83static DEFINE_IDR(tcp_ps);
628e5f6d 84static DEFINE_IDR(udp_ps);
c8f6a362 85static DEFINE_IDR(ipoib_ps);
2d2e9415 86static DEFINE_IDR(ib_ps);
e51060f0
SH		 87
88struct cma_device {
89 struct list_head list;
90 struct ib_device *device;
e51060f0
SH		 91 struct completion comp;
92 atomic_t refcount;
93 struct list_head id_list;
94};
95
e51060f0
SH		 96struct rdma_bind_list {
97 struct idr *ps;
98 struct hlist_head owners;
99 unsigned short port;
100};
101
68602120
SH		 102enum {
103 CMA_OPTION_AFONLY,
104};
105
e51060f0
SH		 106/*
107 * Device removal can occur at anytime, so we need extra handling to
108 * serialize notifying the user of device removal with other callbacks.
109 * We do this by disabling removal notification while a callback is in process,
110 * and reporting it after the callback completes.
111 */
112struct rdma_id_private {
113 struct rdma_cm_id id;
114
115 struct rdma_bind_list *bind_list;
116 struct hlist_node node;
d02d1f53
SH		 117 struct list_head list; /* listen_any_list or cma_device.list */
118 struct list_head listen_list; /* per device listens */
e51060f0 119 struct cma_device *cma_dev;
c8f6a362 120 struct list_head mc_list;
e51060f0 121
d02d1f53 122 int internal_id;
550e5ca7 123 enum rdma_cm_state state;
e51060f0 124 spinlock_t lock;
c5483388
SH		 125 struct mutex qp_mutex;
126
e51060f0
SH		 127 struct completion comp;
128 atomic_t refcount;
de910bd9 129 struct mutex handler_mutex;
e51060f0
SH		 130
131 int backlog;
132 int timeout_ms;
133 struct ib_sa_query *query;
134 int query_id;
135 union {
136 struct ib_cm_id *ib;
07ebafba 137 struct iw_cm_id *iw;
e51060f0
SH		 138 } cm_id;
139
140 u32 seq_num;
c8f6a362 141 u32 qkey;
e51060f0 142 u32 qp_num;
83e9502d 143 pid_t owner;
68602120 144 u32 options;
e51060f0 145 u8 srq;
a81c994d 146 u8 tos;
a9bb7912 147 u8 reuseaddr;
5b0ec991 148 u8 afonly;
e51060f0
SH		 149};
150
c8f6a362
SH		 151struct cma_multicast {
152 struct rdma_id_private *id_priv;
153 union {
154 struct ib_sa_multicast *ib;
155 } multicast;
156 struct list_head list;
157 void *context;
3f446754 158 struct sockaddr_storage addr;
3c86aa70 159 struct kref mcref;
c8f6a362
SH		 160};
161
e51060f0
SH		 162struct cma_work {
163 struct work_struct work;
164 struct rdma_id_private *id;
550e5ca7
NM		 165 enum rdma_cm_state old_state;
166 enum rdma_cm_state new_state;
e51060f0
SH		 167 struct rdma_cm_event event;
168};
169
dd5bdff8
OG		 170struct cma_ndev_work {
171 struct work_struct work;
172 struct rdma_id_private *id;
173 struct rdma_cm_event event;
174};
175
3c86aa70
EC		 176struct iboe_mcast_work {
177 struct work_struct work;
178 struct rdma_id_private *id;
179 struct cma_multicast *mc;
180};
181
e51060f0
SH		 182union cma_ip_addr {
183 struct in6_addr ip6;
184 struct {
1b90c137
AV		 185 __be32 pad[3];
186 __be32 addr;
e51060f0
SH		 187 } ip4;
188};
189
190struct cma_hdr {
191 u8 cma_version;
192 u8 ip_version; /* IP version: 7:4 */
1b90c137 193 __be16 port;
e51060f0
SH		 194 union cma_ip_addr src_addr;
195 union cma_ip_addr dst_addr;
196};
197
e51060f0 198#define CMA_VERSION 0x00
e51060f0 199
550e5ca7 200static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
e51060f0
SH		 201{
202 unsigned long flags;
203 int ret;
204
205 spin_lock_irqsave(&id_priv->lock, flags);
206 ret = (id_priv->state == comp);
207 spin_unlock_irqrestore(&id_priv->lock, flags);
208 return ret;
209}
210
211static int cma_comp_exch(struct rdma_id_private *id_priv,
550e5ca7 212 enum rdma_cm_state comp, enum rdma_cm_state exch)
e51060f0
SH		 213{
214 unsigned long flags;
215 int ret;
216
217 spin_lock_irqsave(&id_priv->lock, flags);
218 if ((ret = (id_priv->state == comp)))
219 id_priv->state = exch;
220 spin_unlock_irqrestore(&id_priv->lock, flags);
221 return ret;
222}
223
550e5ca7
NM		 224static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
225 enum rdma_cm_state exch)
e51060f0
SH		 226{
227 unsigned long flags;
550e5ca7 228 enum rdma_cm_state old;
e51060f0
SH		 229
230 spin_lock_irqsave(&id_priv->lock, flags);
231 old = id_priv->state;
232 id_priv->state = exch;
233 spin_unlock_irqrestore(&id_priv->lock, flags);
234 return old;
235}
236
237static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
238{
239 return hdr->ip_version >> 4;
240}
241
242static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
243{
244 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
245}
246
e51060f0
SH		 247static void cma_attach_to_dev(struct rdma_id_private *id_priv,
248 struct cma_device *cma_dev)
249{
250 atomic_inc(&cma_dev->refcount);
251 id_priv->cma_dev = cma_dev;
252 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 253 id_priv->id.route.addr.dev_addr.transport =
254 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0
SH		 255 list_add_tail(&id_priv->list, &cma_dev->id_list);
256}
257
258static inline void cma_deref_dev(struct cma_device *cma_dev)
259{
260 if (atomic_dec_and_test(&cma_dev->refcount))
261 complete(&cma_dev->comp);
262}
263
3c86aa70
EC		 264static inline void release_mc(struct kref *kref)
265{
266 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
267
268 kfree(mc->multicast.ib);
269 kfree(mc);
270}
271
a396d43a 272static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 273{
a396d43a 274 mutex_lock(&lock);
e51060f0
SH		 275 list_del(&id_priv->list);
276 cma_deref_dev(id_priv->cma_dev);
277 id_priv->cma_dev = NULL;
a396d43a 278 mutex_unlock(&lock);
e51060f0
SH		 279}
280
f4753834
SH		 281static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
282{
283 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
284}
285
286static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
287{
288 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
289}
290
291static inline unsigned short cma_family(struct rdma_id_private *id_priv)
292{
293 return id_priv->id.route.addr.src_addr.ss_family;
294}
295
5c438135 296static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
c8f6a362
SH		 297{
298 struct ib_sa_mcmember_rec rec;
299 int ret = 0;
300
5c438135
SH		 301 if (id_priv->qkey) {
302 if (qkey && id_priv->qkey != qkey)
303 return -EINVAL;
d2ca39f2 304 return 0;
5c438135
SH		 305 }
306
307 if (qkey) {
308 id_priv->qkey = qkey;
309 return 0;
310 }
d2ca39f2
YE		 311
312 switch (id_priv->id.ps) {
c8f6a362 313 case RDMA_PS_UDP:
5c438135 314 case RDMA_PS_IB:
d2ca39f2 315 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 316 break;
317 case RDMA_PS_IPOIB:
d2ca39f2
YE		 318 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
319 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
320 id_priv->id.port_num, &rec.mgid,
321 &rec);
322 if (!ret)
323 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 324 break;
325 default:
326 break;
327 }
328 return ret;
329}
330
680f920a
SH		 331static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
332{
333 dev_addr->dev_type = ARPHRD_INFINIBAND;
334 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
335 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
336}
337
338static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
339{
340 int ret;
341
342 if (addr->sa_family != AF_IB) {
dd5f03be 343 ret = rdma_translate_ip(addr, dev_addr, NULL);
680f920a
SH		 344 } else {
345 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
346 ret = 0;
347 }
348
349 return ret;
350}
351
be9130cc
DL		 352static int cma_acquire_dev(struct rdma_id_private *id_priv,
353 struct rdma_id_private *listen_id_priv)
e51060f0 354{
c8f6a362 355 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 356 struct cma_device *cma_dev;
3c86aa70 357 union ib_gid gid, iboe_gid;
e51060f0 358 int ret = -ENODEV;
29f27e84 359 u8 port, found_port;
3c86aa70
EC		 360 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
361 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
e51060f0 362
2efdd6a0
MS		 363 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
364 id_priv->id.ps == RDMA_PS_IPOIB)
365 return -EINVAL;
366
a396d43a 367 mutex_lock(&lock);
7b85627b
MS		 368 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
369 &iboe_gid);
370
3c86aa70
EC		 371 memcpy(&gid, dev_addr->src_dev_addr +
372 rdma_addr_gid_offset(dev_addr), sizeof gid);
be9130cc
DL		 373 if (listen_id_priv &&
374 rdma_port_get_link_layer(listen_id_priv->id.device,
375 listen_id_priv->id.port_num) == dev_ll) {
376 cma_dev = listen_id_priv->cma_dev;
377 port = listen_id_priv->id.port_num;
378 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
379 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
380 ret = ib_find_cached_gid(cma_dev->device, &iboe_gid,
381 &found_port, NULL);
382 else
383 ret = ib_find_cached_gid(cma_dev->device, &gid,
384 &found_port, NULL);
385
386 if (!ret && (port == found_port)) {
387 id_priv->id.port_num = found_port;
388 goto out;
389 }
390 }
e51060f0 391 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70 392 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
be9130cc
DL		 393 if (listen_id_priv &&
394 listen_id_priv->cma_dev == cma_dev &&
395 listen_id_priv->id.port_num == port)
396 continue;
3c86aa70
EC		 397 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
398 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
399 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
29f27e84 400 ret = ib_find_cached_gid(cma_dev->device, &iboe_gid, &found_port, NULL);
3c86aa70 401 else
29f27e84 402 ret = ib_find_cached_gid(cma_dev->device, &gid, &found_port, NULL);
3c86aa70 403
29f27e84
DL		 404 if (!ret && (port == found_port)) {
405 id_priv->id.port_num = found_port;
3c86aa70 406 goto out;
63f05be2 407 }
3c86aa70 408 }
e51060f0
SH		 409 }
410 }
3c86aa70
EC		 411
412out:
413 if (!ret)
414 cma_attach_to_dev(id_priv, cma_dev);
415
a396d43a 416 mutex_unlock(&lock);
e51060f0
SH		 417 return ret;
418}
419
f17df3b0
SH		 420/*
421 * Select the source IB device and address to reach the destination IB address.
422 */
423static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
424{
425 struct cma_device *cma_dev, *cur_dev;
426 struct sockaddr_ib *addr;
427 union ib_gid gid, sgid, *dgid;
428 u16 pkey, index;
8fb488d7 429 u8 p;
f17df3b0
SH		 430 int i;
431
432 cma_dev = NULL;
433 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
434 dgid = (union ib_gid *) &addr->sib_addr;
435 pkey = ntohs(addr->sib_pkey);
436
437 list_for_each_entry(cur_dev, &dev_list, list) {
438 if (rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
439 continue;
440
441 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
442 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
443 continue;
444
445 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
446 if (!memcmp(&gid, dgid, sizeof(gid))) {
447 cma_dev = cur_dev;
448 sgid = gid;
8fb488d7 449 id_priv->id.port_num = p;
f17df3b0
SH		 450 goto found;
451 }
452
453 if (!cma_dev && (gid.global.subnet_prefix ==
454 dgid->global.subnet_prefix)) {
455 cma_dev = cur_dev;
456 sgid = gid;
8fb488d7 457 id_priv->id.port_num = p;
f17df3b0
SH		 458 }
459 }
460 }
461 }
462
463 if (!cma_dev)
464 return -ENODEV;
465
466found:
467 cma_attach_to_dev(id_priv, cma_dev);
f17df3b0
SH		 468 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
469 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
470 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
471 return 0;
472}
473
e51060f0
SH		 474static void cma_deref_id(struct rdma_id_private *id_priv)
475{
476 if (atomic_dec_and_test(&id_priv->refcount))
477 complete(&id_priv->comp);
478}
479
de910bd9 480static int cma_disable_callback(struct rdma_id_private *id_priv,
550e5ca7 481 enum rdma_cm_state state)
8aa08602 482{
de910bd9
OG		 483 mutex_lock(&id_priv->handler_mutex);
484 if (id_priv->state != state) {
485 mutex_unlock(&id_priv->handler_mutex);
486 return -EINVAL;
487 }
488 return 0;
e51060f0
SH		 489}
490
491struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
b26f9b99
SH		 492 void *context, enum rdma_port_space ps,
493 enum ib_qp_type qp_type)
e51060f0
SH		 494{
495 struct rdma_id_private *id_priv;
496
497 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
498 if (!id_priv)
499 return ERR_PTR(-ENOMEM);
500
83e9502d 501 id_priv->owner = task_pid_nr(current);
550e5ca7 502 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 503 id_priv->id.context = context;
504 id_priv->id.event_handler = event_handler;
505 id_priv->id.ps = ps;
b26f9b99 506 id_priv->id.qp_type = qp_type;
e51060f0 507 spin_lock_init(&id_priv->lock);
c5483388 508 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 509 init_completion(&id_priv->comp);
510 atomic_set(&id_priv->refcount, 1);
de910bd9 511 mutex_init(&id_priv->handler_mutex);
e51060f0 512 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 513 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 514 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
515
516 return &id_priv->id;
517}
518EXPORT_SYMBOL(rdma_create_id);
519
c8f6a362 520static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 521{
522 struct ib_qp_attr qp_attr;
c8f6a362 523 int qp_attr_mask, ret;
e51060f0 524
c8f6a362
SH		 525 qp_attr.qp_state = IB_QPS_INIT;
526 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 527 if (ret)
528 return ret;
529
c8f6a362
SH		 530 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
531 if (ret)
532 return ret;
533
534 qp_attr.qp_state = IB_QPS_RTR;
535 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
536 if (ret)
537 return ret;
538
539 qp_attr.qp_state = IB_QPS_RTS;
540 qp_attr.sq_psn = 0;
541 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
542
543 return ret;
e51060f0
SH		 544}
545
c8f6a362 546static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 547{
548 struct ib_qp_attr qp_attr;
c8f6a362 549 int qp_attr_mask, ret;
07ebafba
TT		 550
551 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 552 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
553 if (ret)
554 return ret;
07ebafba 555
c8f6a362 556 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 557}
558
e51060f0
SH		 559int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
560 struct ib_qp_init_attr *qp_init_attr)
561{
562 struct rdma_id_private *id_priv;
563 struct ib_qp *qp;
564 int ret;
565
566 id_priv = container_of(id, struct rdma_id_private, id);
567 if (id->device != pd->device)
568 return -EINVAL;
569
570 qp = ib_create_qp(pd, qp_init_attr);
571 if (IS_ERR(qp))
572 return PTR_ERR(qp);
573
b26f9b99 574 if (id->qp_type == IB_QPT_UD)
c8f6a362
SH		 575 ret = cma_init_ud_qp(id_priv, qp);
576 else
577 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 578 if (ret)
579 goto err;
580
581 id->qp = qp;
582 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 583 id_priv->srq = (qp->srq != NULL);
584 return 0;
585err:
586 ib_destroy_qp(qp);
587 return ret;
588}
589EXPORT_SYMBOL(rdma_create_qp);
590
591void rdma_destroy_qp(struct rdma_cm_id *id)
592{
c5483388
SH		 593 struct rdma_id_private *id_priv;
594
595 id_priv = container_of(id, struct rdma_id_private, id);
596 mutex_lock(&id_priv->qp_mutex);
597 ib_destroy_qp(id_priv->id.qp);
598 id_priv->id.qp = NULL;
599 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 600}
601EXPORT_SYMBOL(rdma_destroy_qp);
602
5851bb89
SH		 603static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
604 struct rdma_conn_param *conn_param)
e51060f0
SH		 605{
606 struct ib_qp_attr qp_attr;
607 int qp_attr_mask, ret;
dd5f03be 608 union ib_gid sgid;
e51060f0 609
c5483388
SH		 610 mutex_lock(&id_priv->qp_mutex);
611 if (!id_priv->id.qp) {
612 ret = 0;
613 goto out;
614 }
e51060f0
SH		 615
616 /* Need to update QP attributes from default values. */
617 qp_attr.qp_state = IB_QPS_INIT;
c5483388 618 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 619 if (ret)
c5483388 620 goto out;
e51060f0 621
c5483388 622 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 623 if (ret)
c5483388 624 goto out;
e51060f0
SH		 625
626 qp_attr.qp_state = IB_QPS_RTR;
c5483388 627 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 628 if (ret)
c5483388 629 goto out;
e51060f0 630
dd5f03be
MB		 631 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
632 qp_attr.ah_attr.grh.sgid_index, &sgid);
633 if (ret)
634 goto out;
635
636 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type)
637 == RDMA_TRANSPORT_IB &&
638 rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)
639 == IB_LINK_LAYER_ETHERNET) {
640 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr.smac, NULL);
641
642 if (ret)
643 goto out;
644 }
5851bb89
SH		 645 if (conn_param)
646 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 647 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
648out:
649 mutex_unlock(&id_priv->qp_mutex);
650 return ret;
e51060f0
SH		 651}
652
5851bb89
SH		 653static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
654 struct rdma_conn_param *conn_param)
e51060f0
SH		 655{
656 struct ib_qp_attr qp_attr;
657 int qp_attr_mask, ret;
658
c5483388
SH		 659 mutex_lock(&id_priv->qp_mutex);
660 if (!id_priv->id.qp) {
661 ret = 0;
662 goto out;
663 }
e51060f0
SH		 664
665 qp_attr.qp_state = IB_QPS_RTS;
c5483388 666 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 667 if (ret)
c5483388 668 goto out;
e51060f0 669
5851bb89
SH		 670 if (conn_param)
671 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 672 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
673out:
674 mutex_unlock(&id_priv->qp_mutex);
675 return ret;
e51060f0
SH		 676}
677
c5483388 678static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 679{
680 struct ib_qp_attr qp_attr;
c5483388 681 int ret;
e51060f0 682
c5483388
SH		 683 mutex_lock(&id_priv->qp_mutex);
684 if (!id_priv->id.qp) {
685 ret = 0;
686 goto out;
687 }
e51060f0
SH		 688
689 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 690 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
691out:
692 mutex_unlock(&id_priv->qp_mutex);
693 return ret;
e51060f0
SH		 694}
695
c8f6a362
SH		 696static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
697 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
698{
699 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
700 int ret;
3c86aa70
EC		 701 u16 pkey;
702
703 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
704 IB_LINK_LAYER_INFINIBAND)
705 pkey = ib_addr_get_pkey(dev_addr);
706 else
707 pkey = 0xffff;
c8f6a362
SH		 708
709 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 710 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 711 if (ret)
712 return ret;
713
714 qp_attr->port_num = id_priv->id.port_num;
715 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
716
b26f9b99 717 if (id_priv->id.qp_type == IB_QPT_UD) {
5c438135 718 ret = cma_set_qkey(id_priv, 0);
d2ca39f2
YE		 719 if (ret)
720 return ret;
721
c8f6a362
SH		 722 qp_attr->qkey = id_priv->qkey;
723 *qp_attr_mask |= IB_QP_QKEY;
724 } else {
725 qp_attr->qp_access_flags = 0;
726 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
727 }
728 return 0;
729}
730
e51060f0
SH		 731int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
732 int *qp_attr_mask)
733{
734 struct rdma_id_private *id_priv;
c8f6a362 735 int ret = 0;
e51060f0
SH		 736
737 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 738 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
739 case RDMA_TRANSPORT_IB:
b26f9b99 740 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 741 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
742 else
743 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
744 qp_attr_mask);
dd5f03be 745
e51060f0
SH		 746 if (qp_attr->qp_state == IB_QPS_RTR)
747 qp_attr->rq_psn = id_priv->seq_num;
748 break;
07ebafba 749 case RDMA_TRANSPORT_IWARP:
c8f6a362 750 if (!id_priv->cm_id.iw) {
8f076531 751 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 752 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
753 } else
754 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
755 qp_attr_mask);
07ebafba 756 break;
e51060f0
SH		 757 default:
758 ret = -ENOSYS;
759 break;
760 }
761
762 return ret;
763}
764EXPORT_SYMBOL(rdma_init_qp_attr);
765
766static inline int cma_zero_addr(struct sockaddr *addr)
767{
2e2d190c
SH		 768 switch (addr->sa_family) {
769 case AF_INET:
770 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
771 case AF_INET6:
772 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
773 case AF_IB:
774 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
775 default:
776 return 0;
e51060f0
SH		 777 }
778}
779
780static inline int cma_loopback_addr(struct sockaddr *addr)
781{
2e2d190c
SH		 782 switch (addr->sa_family) {
783 case AF_INET:
784 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
785 case AF_INET6:
786 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
787 case AF_IB:
788 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
789 default:
790 return 0;
791 }
e51060f0
SH		 792}
793
794static inline int cma_any_addr(struct sockaddr *addr)
795{
796 return cma_zero_addr(addr) || cma_loopback_addr(addr);
797}
798
43b752da
HS		 799static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
800{
801 if (src->sa_family != dst->sa_family)
802 return -1;
803
804 switch (src->sa_family) {
805 case AF_INET:
806 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
807 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2e2d190c 808 case AF_INET6:
43b752da
HS		 809 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
810 &((struct sockaddr_in6 *) dst)->sin6_addr);
2e2d190c
SH		 811 default:
812 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
813 &((struct sockaddr_ib *) dst)->sib_addr);
43b752da
HS		 814 }
815}
816
58afdcb7 817static __be16 cma_port(struct sockaddr *addr)
628e5f6d 818{
58afdcb7
SH		 819 struct sockaddr_ib *sib;
820
821 switch (addr->sa_family) {
822 case AF_INET:
628e5f6d 823 return ((struct sockaddr_in *) addr)->sin_port;
58afdcb7 824 case AF_INET6:
628e5f6d 825 return ((struct sockaddr_in6 *) addr)->sin6_port;
58afdcb7
SH		 826 case AF_IB:
827 sib = (struct sockaddr_ib *) addr;
828 return htons((u16) (be64_to_cpu(sib->sib_sid) &
829 be64_to_cpu(sib->sib_sid_mask)));
830 default:
831 return 0;
832 }
628e5f6d
SH		 833}
834
e51060f0
SH		 835static inline int cma_any_port(struct sockaddr *addr)
836{
628e5f6d 837 return !cma_port(addr);
e51060f0
SH		 838}
839
fbaa1a6d
SH		 840static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
841 struct ib_sa_path_rec *path)
e51060f0 842{
fbaa1a6d
SH		 843 struct sockaddr_ib *listen_ib, *ib;
844
845 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
846 ib = (struct sockaddr_ib *) &id->route.addr.src_addr;
847 ib->sib_family = listen_ib->sib_family;
c07678bb
MF		 848 if (path) {
849 ib->sib_pkey = path->pkey;
850 ib->sib_flowinfo = path->flow_label;
851 memcpy(&ib->sib_addr, &path->sgid, 16);
852 } else {
853 ib->sib_pkey = listen_ib->sib_pkey;
854 ib->sib_flowinfo = listen_ib->sib_flowinfo;
855 ib->sib_addr = listen_ib->sib_addr;
856 }
fbaa1a6d
SH		 857 ib->sib_sid = listen_ib->sib_sid;
858 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
859 ib->sib_scope_id = listen_ib->sib_scope_id;
860
c07678bb
MF		 861 if (path) {
862 ib = (struct sockaddr_ib *) &id->route.addr.dst_addr;
863 ib->sib_family = listen_ib->sib_family;
864 ib->sib_pkey = path->pkey;
865 ib->sib_flowinfo = path->flow_label;
866 memcpy(&ib->sib_addr, &path->dgid, 16);
867 }
fbaa1a6d 868}
e51060f0 869
28521440
JG		 870static __be16 ss_get_port(const struct sockaddr_storage *ss)
871{
872 if (ss->ss_family == AF_INET)
873 return ((struct sockaddr_in *)ss)->sin_port;
874 else if (ss->ss_family == AF_INET6)
875 return ((struct sockaddr_in6 *)ss)->sin6_port;
876 BUG();
877}
878
fbaa1a6d
SH		 879static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
880 struct cma_hdr *hdr)
881{
28521440 882 struct sockaddr_in *ip4;
e51060f0 883
fbaa1a6d 884 ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
28521440 885 ip4->sin_family = AF_INET;
fbaa1a6d 886 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
28521440 887 ip4->sin_port = ss_get_port(&listen_id->route.addr.src_addr);
fbaa1a6d
SH		 888
889 ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
28521440 890 ip4->sin_family = AF_INET;
fbaa1a6d
SH		 891 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
892 ip4->sin_port = hdr->port;
e51060f0
SH		 893}
894
fbaa1a6d
SH		 895static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
896 struct cma_hdr *hdr)
e51060f0 897{
28521440 898 struct sockaddr_in6 *ip6;
e51060f0 899
fbaa1a6d 900 ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
28521440 901 ip6->sin6_family = AF_INET6;
fbaa1a6d 902 ip6->sin6_addr = hdr->dst_addr.ip6;
28521440 903 ip6->sin6_port = ss_get_port(&listen_id->route.addr.src_addr);
fbaa1a6d
SH		 904
905 ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
28521440 906 ip6->sin6_family = AF_INET6;
fbaa1a6d
SH		 907 ip6->sin6_addr = hdr->src_addr.ip6;
908 ip6->sin6_port = hdr->port;
909}
910
911static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
912 struct ib_cm_event *ib_event)
913{
914 struct cma_hdr *hdr;
915
c07678bb
MF		 916 if (listen_id->route.addr.src_addr.ss_family == AF_IB) {
917 if (ib_event->event == IB_CM_REQ_RECEIVED)
918 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path);
919 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
920 cma_save_ib_info(id, listen_id, NULL);
fbaa1a6d
SH		 921 return 0;
922 }
923
924 hdr = ib_event->private_data;
925 if (hdr->cma_version != CMA_VERSION)
926 return -EINVAL;
927
928 switch (cma_get_ip_ver(hdr)) {
e51060f0 929 case 4:
fbaa1a6d 930 cma_save_ip4_info(id, listen_id, hdr);
e51060f0
SH		 931 break;
932 case 6:
fbaa1a6d 933 cma_save_ip6_info(id, listen_id, hdr);
e51060f0
SH		 934 break;
935 default:
fbaa1a6d 936 return -EINVAL;
e51060f0 937 }
fbaa1a6d 938 return 0;
e51060f0
SH		 939}
940
e8160e15 941static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
e51060f0 942{
e8160e15 943 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
e51060f0
SH		 944}
945
e51060f0
SH		 946static void cma_cancel_route(struct rdma_id_private *id_priv)
947{
3c86aa70
EC		 948 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
949 case IB_LINK_LAYER_INFINIBAND:
e51060f0
SH		 950 if (id_priv->query)
951 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
952 break;
953 default:
954 break;
955 }
956}
957
e51060f0
SH		 958static void cma_cancel_listens(struct rdma_id_private *id_priv)
959{
960 struct rdma_id_private *dev_id_priv;
961
d02d1f53
SH		 962 /*
963 * Remove from listen_any_list to prevent added devices from spawning
964 * additional listen requests.
965 */
e51060f0
SH		 966 mutex_lock(&lock);
967 list_del(&id_priv->list);
968
969 while (!list_empty(&id_priv->listen_list)) {
970 dev_id_priv = list_entry(id_priv->listen_list.next,
971 struct rdma_id_private, listen_list);
d02d1f53
SH		 972 /* sync with device removal to avoid duplicate destruction */
973 list_del_init(&dev_id_priv->list);
974 list_del(&dev_id_priv->listen_list);
975 mutex_unlock(&lock);
976
977 rdma_destroy_id(&dev_id_priv->id);
978 mutex_lock(&lock);
e51060f0
SH		 979 }
980 mutex_unlock(&lock);
981}
982
983static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 984 enum rdma_cm_state state)
e51060f0
SH		 985{
986 switch (state) {
550e5ca7 987 case RDMA_CM_ADDR_QUERY:
e51060f0
SH		 988 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
989 break;
550e5ca7 990 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 991 cma_cancel_route(id_priv);
992 break;
550e5ca7 993 case RDMA_CM_LISTEN:
f4753834 994 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
e51060f0
SH		 995 cma_cancel_listens(id_priv);
996 break;
997 default:
998 break;
999 }
1000}
1001
1002static void cma_release_port(struct rdma_id_private *id_priv)
1003{
1004 struct rdma_bind_list *bind_list = id_priv->bind_list;
1005
1006 if (!bind_list)
1007 return;
1008
1009 mutex_lock(&lock);
1010 hlist_del(&id_priv->node);
1011 if (hlist_empty(&bind_list->owners)) {
1012 idr_remove(bind_list->ps, bind_list->port);
1013 kfree(bind_list);
1014 }
1015 mutex_unlock(&lock);
1016}
1017
c8f6a362
SH		 1018static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1019{
1020 struct cma_multicast *mc;
1021
1022 while (!list_empty(&id_priv->mc_list)) {
1023 mc = container_of(id_priv->mc_list.next,
1024 struct cma_multicast, list);
1025 list_del(&mc->list);
3c86aa70
EC		 1026 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
1027 case IB_LINK_LAYER_INFINIBAND:
1028 ib_sa_free_multicast(mc->multicast.ib);
1029 kfree(mc);
1030 break;
1031 case IB_LINK_LAYER_ETHERNET:
1032 kref_put(&mc->mcref, release_mc);
1033 break;
1034 default:
1035 break;
1036 }
c8f6a362
SH		 1037 }
1038}
1039
e51060f0
SH		 1040void rdma_destroy_id(struct rdma_cm_id *id)
1041{
1042 struct rdma_id_private *id_priv;
550e5ca7 1043 enum rdma_cm_state state;
e51060f0
SH		 1044
1045 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1046 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1047 cma_cancel_operation(id_priv, state);
1048
a396d43a
SH		 1049 /*
1050 * Wait for any active callback to finish. New callbacks will find
1051 * the id_priv state set to destroying and abort.
1052 */
1053 mutex_lock(&id_priv->handler_mutex);
1054 mutex_unlock(&id_priv->handler_mutex);
1055
e51060f0 1056 if (id_priv->cma_dev) {
3c86aa70 1057 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
07ebafba 1058 case RDMA_TRANSPORT_IB:
0c9361fc 1059 if (id_priv->cm_id.ib)
e51060f0
SH		 1060 ib_destroy_cm_id(id_priv->cm_id.ib);
1061 break;
07ebafba 1062 case RDMA_TRANSPORT_IWARP:
0c9361fc 1063 if (id_priv->cm_id.iw)
07ebafba
TT		 1064 iw_destroy_cm_id(id_priv->cm_id.iw);
1065 break;
e51060f0
SH		 1066 default:
1067 break;
1068 }
c8f6a362 1069 cma_leave_mc_groups(id_priv);
a396d43a 1070 cma_release_dev(id_priv);
e51060f0
SH		 1071 }
1072
1073 cma_release_port(id_priv);
1074 cma_deref_id(id_priv);
1075 wait_for_completion(&id_priv->comp);
1076
d02d1f53
SH		 1077 if (id_priv->internal_id)
1078 cma_deref_id(id_priv->id.context);
1079
e51060f0
SH		 1080 kfree(id_priv->id.route.path_rec);
1081 kfree(id_priv);
1082}
1083EXPORT_SYMBOL(rdma_destroy_id);
1084
1085static int cma_rep_recv(struct rdma_id_private *id_priv)
1086{
1087 int ret;
1088
5851bb89 1089 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 1090 if (ret)
1091 goto reject;
1092
5851bb89 1093 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 1094 if (ret)
1095 goto reject;
1096
1097 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1098 if (ret)
1099 goto reject;
1100
1101 return 0;
1102reject:
c5483388 1103 cma_modify_qp_err(id_priv);
e51060f0
SH		 1104 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1105 NULL, 0, NULL, 0);
1106 return ret;
1107}
1108
a1b1b61f
SH		 1109static void cma_set_rep_event_data(struct rdma_cm_event *event,
1110 struct ib_cm_rep_event_param *rep_data,
1111 void *private_data)
1112{
1113 event->param.conn.private_data = private_data;
1114 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1115 event->param.conn.responder_resources = rep_data->responder_resources;
1116 event->param.conn.initiator_depth = rep_data->initiator_depth;
1117 event->param.conn.flow_control = rep_data->flow_control;
1118 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1119 event->param.conn.srq = rep_data->srq;
1120 event->param.conn.qp_num = rep_data->remote_qpn;
1121}
1122
e51060f0
SH		 1123static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1124{
1125 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 1126 struct rdma_cm_event event;
1127 int ret = 0;
e51060f0 1128
38ca83a5 1129 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1130 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
38ca83a5 1131 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1132 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
8aa08602 1133 return 0;
e51060f0 1134
a1b1b61f 1135 memset(&event, 0, sizeof event);
e51060f0
SH		 1136 switch (ib_event->event) {
1137 case IB_CM_REQ_ERROR:
1138 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1139 event.event = RDMA_CM_EVENT_UNREACHABLE;
1140 event.status = -ETIMEDOUT;
e51060f0
SH		 1141 break;
1142 case IB_CM_REP_RECEIVED:
01602f11 1143 if (id_priv->id.qp) {
a1b1b61f
SH		 1144 event.status = cma_rep_recv(id_priv);
1145 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1146 RDMA_CM_EVENT_ESTABLISHED;
01602f11 1147 } else {
a1b1b61f 1148 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
01602f11 1149 }
a1b1b61f
SH		 1150 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1151 ib_event->private_data);
e51060f0
SH		 1152 break;
1153 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1154 case IB_CM_USER_ESTABLISHED:
1155 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1156 break;
1157 case IB_CM_DREQ_ERROR:
a1b1b61f 1158 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1159 case IB_CM_DREQ_RECEIVED:
1160 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 1161 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1162 RDMA_CM_DISCONNECT))
e51060f0 1163 goto out;
a1b1b61f 1164 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1165 break;
1166 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1167 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1168 break;
e51060f0
SH		 1169 case IB_CM_MRA_RECEIVED:
1170 /* ignore event */
1171 goto out;
1172 case IB_CM_REJ_RECEIVED:
c5483388 1173 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1174 event.status = ib_event->param.rej_rcvd.reason;
1175 event.event = RDMA_CM_EVENT_REJECTED;
1176 event.param.conn.private_data = ib_event->private_data;
1177 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1178 break;
1179 default:
468f2239 1180 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1181 ib_event->event);
1182 goto out;
1183 }
1184
a1b1b61f 1185 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1186 if (ret) {
1187 /* Destroy the CM ID by returning a non-zero value. */
1188 id_priv->cm_id.ib = NULL;
550e5ca7 1189 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1190 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1191 rdma_destroy_id(&id_priv->id);
1192 return ret;
1193 }
1194out:
de910bd9 1195 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1196 return ret;
1197}
1198
628e5f6d
SH		 1199static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1200 struct ib_cm_event *ib_event)
e51060f0
SH		 1201{
1202 struct rdma_id_private *id_priv;
1203 struct rdma_cm_id *id;
1204 struct rdma_route *rt;
64c5e613 1205 int ret;
e51060f0
SH		 1206
1207 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1208 listen_id->ps, ib_event->param.req_rcvd.qp_type);
e51060f0 1209 if (IS_ERR(id))
0c9361fc 1210 return NULL;
3f168d2b 1211
f4753834 1212 id_priv = container_of(id, struct rdma_id_private, id);
fbaa1a6d
SH		 1213 if (cma_save_net_info(id, listen_id, ib_event))
1214 goto err;
e51060f0
SH		 1215
1216 rt = &id->route;
1217 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1218 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1219 GFP_KERNEL);
e51060f0 1220 if (!rt->path_rec)
0c9361fc 1221 goto err;
e51060f0 1222
e51060f0
SH		 1223 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1224 if (rt->num_paths == 2)
1225 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1226
f4753834 1227 if (cma_any_addr(cma_src_addr(id_priv))) {
6f8372b6
SH		 1228 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1229 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
46ea5061 1230 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
6f8372b6 1231 } else {
f4753834 1232 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
6f8372b6 1233 if (ret)
0c9361fc 1234 goto err;
6f8372b6
SH		 1235 }
1236 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0 1237
550e5ca7 1238 id_priv->state = RDMA_CM_CONNECT;
e51060f0 1239 return id_priv;
3f168d2b 1240
3f168d2b 1241err:
0c9361fc 1242 rdma_destroy_id(id);
e51060f0
SH		 1243 return NULL;
1244}
1245
628e5f6d
SH		 1246static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1247 struct ib_cm_event *ib_event)
1248{
1249 struct rdma_id_private *id_priv;
1250 struct rdma_cm_id *id;
628e5f6d
SH		 1251 int ret;
1252
1253 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1254 listen_id->ps, IB_QPT_UD);
628e5f6d
SH		 1255 if (IS_ERR(id))
1256 return NULL;
1257
f4753834 1258 id_priv = container_of(id, struct rdma_id_private, id);
fbaa1a6d 1259 if (cma_save_net_info(id, listen_id, ib_event))
628e5f6d
SH		 1260 goto err;
1261
6f8372b6 1262 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
f4753834 1263 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr);
6f8372b6
SH		 1264 if (ret)
1265 goto err;
1266 }
628e5f6d 1267
550e5ca7 1268 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 1269 return id_priv;
1270err:
1271 rdma_destroy_id(id);
1272 return NULL;
1273}
1274
a1b1b61f
SH		 1275static void cma_set_req_event_data(struct rdma_cm_event *event,
1276 struct ib_cm_req_event_param *req_data,
1277 void *private_data, int offset)
1278{
1279 event->param.conn.private_data = private_data + offset;
1280 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1281 event->param.conn.responder_resources = req_data->responder_resources;
1282 event->param.conn.initiator_depth = req_data->initiator_depth;
1283 event->param.conn.flow_control = req_data->flow_control;
1284 event->param.conn.retry_count = req_data->retry_count;
1285 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1286 event->param.conn.srq = req_data->srq;
1287 event->param.conn.qp_num = req_data->remote_qpn;
1288}
1289
9595480c
HS		 1290static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1291{
4dd81e89 1292 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 1293 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1294 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1295 (id->qp_type == IB_QPT_UD)) ||
1296 (!id->qp_type));
1297}
1298
e51060f0
SH		 1299static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1300{
1301 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1302 struct rdma_cm_event event;
e51060f0
SH		 1303 int offset, ret;
1304
1305 listen_id = cm_id->context;
9595480c
HS		 1306 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1307 return -EINVAL;
1308
550e5ca7 1309 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1310 return -ECONNABORTED;
e51060f0 1311
628e5f6d 1312 memset(&event, 0, sizeof event);
e8160e15 1313 offset = cma_user_data_offset(listen_id);
628e5f6d 1314 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 1315 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
628e5f6d
SH		 1316 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1317 event.param.ud.private_data = ib_event->private_data + offset;
1318 event.param.ud.private_data_len =
1319 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1320 } else {
1321 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1322 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1323 ib_event->private_data, offset);
1324 }
e51060f0
SH		 1325 if (!conn_id) {
1326 ret = -ENOMEM;
b6cec8aa 1327 goto err1;
e51060f0
SH		 1328 }
1329
de910bd9 1330 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
be9130cc 1331 ret = cma_acquire_dev(conn_id, listen_id);
a1a733f6 1332 if (ret)
b6cec8aa 1333 goto err2;
e51060f0
SH		 1334
1335 conn_id->cm_id.ib = cm_id;
1336 cm_id->context = conn_id;
1337 cm_id->cm_handler = cma_ib_handler;
1338
25ae21a1
SH		 1339 /*
1340 * Protect against the user destroying conn_id from another thread
1341 * until we're done accessing it.
1342 */
1343 atomic_inc(&conn_id->refcount);
a1b1b61f 1344 ret = conn_id->id.event_handler(&conn_id->id, &event);
b6cec8aa
SH		 1345 if (ret)
1346 goto err3;
b6cec8aa
SH		 1347 /*
1348 * Acquire mutex to prevent user executing rdma_destroy_id()
1349 * while we're accessing the cm_id.
1350 */
1351 mutex_lock(&lock);
dd5f03be
MB		 1352 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1353 (conn_id->id.qp_type != IB_QPT_UD))
b6cec8aa
SH		 1354 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1355 mutex_unlock(&lock);
1356 mutex_unlock(&conn_id->handler_mutex);
1357 mutex_unlock(&listen_id->handler_mutex);
25ae21a1 1358 cma_deref_id(conn_id);
b6cec8aa 1359 return 0;
a1a733f6 1360
b6cec8aa
SH		 1361err3:
1362 cma_deref_id(conn_id);
a1a733f6
KK		 1363 /* Destroy the CM ID by returning a non-zero value. */
1364 conn_id->cm_id.ib = NULL;
b6cec8aa 1365err2:
550e5ca7 1366 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1367 mutex_unlock(&conn_id->handler_mutex);
b6cec8aa 1368err1:
de910bd9 1369 mutex_unlock(&listen_id->handler_mutex);
b6cec8aa
SH		 1370 if (conn_id)
1371 rdma_destroy_id(&conn_id->id);
e51060f0
SH		 1372 return ret;
1373}
1374
cf53936f 1375__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
e51060f0 1376{
496ce3ce
SH		 1377 if (addr->sa_family == AF_IB)
1378 return ((struct sockaddr_ib *) addr)->sib_sid;
1379
cf53936f 1380 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0 1381}
cf53936f 1382EXPORT_SYMBOL(rdma_get_service_id);
e51060f0
SH		 1383
1384static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1385 struct ib_cm_compare_data *compare)
1386{
1387 struct cma_hdr *cma_data, *cma_mask;
1b90c137 1388 __be32 ip4_addr;
e51060f0
SH		 1389 struct in6_addr ip6_addr;
1390
1391 memset(compare, 0, sizeof *compare);
1392 cma_data = (void *) compare->data;
1393 cma_mask = (void *) compare->mask;
e51060f0
SH		 1394
1395 switch (addr->sa_family) {
1396 case AF_INET:
1397 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
01602f11
SH		 1398 cma_set_ip_ver(cma_data, 4);
1399 cma_set_ip_ver(cma_mask, 0xF);
1400 if (!cma_any_addr(addr)) {
1401 cma_data->dst_addr.ip4.addr = ip4_addr;
1402 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1403 }
1404 break;
1405 case AF_INET6:
1406 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
01602f11
SH		 1407 cma_set_ip_ver(cma_data, 6);
1408 cma_set_ip_ver(cma_mask, 0xF);
1409 if (!cma_any_addr(addr)) {
1410 cma_data->dst_addr.ip6 = ip6_addr;
1411 memset(&cma_mask->dst_addr.ip6, 0xFF,
1412 sizeof cma_mask->dst_addr.ip6);
e51060f0
SH		 1413 }
1414 break;
1415 default:
1416 break;
1417 }
1418}
1419
07ebafba
TT		 1420static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1421{
1422 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1423 struct rdma_cm_event event;
07ebafba 1424 int ret = 0;
24d44a39
SW		 1425 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1426 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba 1427
550e5ca7 1428 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
be65f086 1429 return 0;
07ebafba 1430
be65f086 1431 memset(&event, 0, sizeof event);
07ebafba
TT		 1432 switch (iw_event->event) {
1433 case IW_CM_EVENT_CLOSE:
a1b1b61f 1434 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1435 break;
1436 case IW_CM_EVENT_CONNECT_REPLY:
24d44a39
SW		 1437 memcpy(cma_src_addr(id_priv), laddr,
1438 rdma_addr_size(laddr));
1439 memcpy(cma_dst_addr(id_priv), raddr,
1440 rdma_addr_size(raddr));
881a045f
SW		 1441 switch (iw_event->status) {
1442 case 0:
a1b1b61f 1443 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1444 event.param.conn.initiator_depth = iw_event->ird;
1445 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 1446 break;
1447 case -ECONNRESET:
1448 case -ECONNREFUSED:
1449 event.event = RDMA_CM_EVENT_REJECTED;
1450 break;
1451 case -ETIMEDOUT:
1452 event.event = RDMA_CM_EVENT_UNREACHABLE;
1453 break;
1454 default:
1455 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1456 break;
1457 }
07ebafba
TT		 1458 break;
1459 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1460 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1461 event.param.conn.initiator_depth = iw_event->ird;
1462 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 1463 break;
1464 default:
1465 BUG_ON(1);
1466 }
1467
a1b1b61f
SH		 1468 event.status = iw_event->status;
1469 event.param.conn.private_data = iw_event->private_data;
1470 event.param.conn.private_data_len = iw_event->private_data_len;
1471 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1472 if (ret) {
1473 /* Destroy the CM ID by returning a non-zero value. */
1474 id_priv->cm_id.iw = NULL;
550e5ca7 1475 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1476 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1477 rdma_destroy_id(&id_priv->id);
1478 return ret;
1479 }
1480
de910bd9 1481 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1482 return ret;
1483}
1484
1485static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1486 struct iw_cm_event *iw_event)
1487{
1488 struct rdma_cm_id *new_cm_id;
1489 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1490 struct rdma_cm_event event;
07ebafba 1491 int ret;
8d8293cf 1492 struct ib_device_attr attr;
24d44a39
SW		 1493 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1494 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba
TT		 1495
1496 listen_id = cm_id->context;
550e5ca7 1497 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1498 return -ECONNABORTED;
07ebafba
TT		 1499
1500 /* Create a new RDMA id for the new IW CM ID */
1501 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1502 listen_id->id.context,
b26f9b99 1503 RDMA_PS_TCP, IB_QPT_RC);
10f32065 1504 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1505 ret = -ENOMEM;
1506 goto out;
1507 }
1508 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1509 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 1510 conn_id->state = RDMA_CM_CONNECT;
07ebafba 1511
dd5f03be 1512 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
07ebafba 1513 if (ret) {
de910bd9 1514 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1515 rdma_destroy_id(new_cm_id);
1516 goto out;
1517 }
1518
be9130cc 1519 ret = cma_acquire_dev(conn_id, listen_id);
07ebafba 1520 if (ret) {
de910bd9 1521 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1522 rdma_destroy_id(new_cm_id);
1523 goto out;
1524 }
1525
1526 conn_id->cm_id.iw = cm_id;
1527 cm_id->context = conn_id;
1528 cm_id->cm_handler = cma_iw_handler;
1529
24d44a39
SW		 1530 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
1531 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
07ebafba 1532
8d8293cf
SW		 1533 ret = ib_query_device(conn_id->id.device, &attr);
1534 if (ret) {
de910bd9 1535 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1536 rdma_destroy_id(new_cm_id);
1537 goto out;
1538 }
1539
a1b1b61f
SH		 1540 memset(&event, 0, sizeof event);
1541 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1542 event.param.conn.private_data = iw_event->private_data;
1543 event.param.conn.private_data_len = iw_event->private_data_len;
3ebeebc3
KS		 1544 event.param.conn.initiator_depth = iw_event->ird;
1545 event.param.conn.responder_resources = iw_event->ord;
25ae21a1
SH		 1546
1547 /*
1548 * Protect against the user destroying conn_id from another thread
1549 * until we're done accessing it.
1550 */
1551 atomic_inc(&conn_id->refcount);
a1b1b61f 1552 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1553 if (ret) {
1554 /* User wants to destroy the CM ID */
1555 conn_id->cm_id.iw = NULL;
550e5ca7 1556 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1557 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1558 cma_deref_id(conn_id);
07ebafba 1559 rdma_destroy_id(&conn_id->id);
de910bd9 1560 goto out;
07ebafba
TT		 1561 }
1562
de910bd9 1563 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1564 cma_deref_id(conn_id);
de910bd9 1565
07ebafba 1566out:
de910bd9 1567 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1568 return ret;
1569}
1570
e51060f0
SH		 1571static int cma_ib_listen(struct rdma_id_private *id_priv)
1572{
1573 struct ib_cm_compare_data compare_data;
1574 struct sockaddr *addr;
0c9361fc 1575 struct ib_cm_id *id;
e51060f0
SH		 1576 __be64 svc_id;
1577 int ret;
1578
0c9361fc
JM		 1579 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1580 if (IS_ERR(id))
1581 return PTR_ERR(id);
1582
1583 id_priv->cm_id.ib = id;
e51060f0 1584
f4753834 1585 addr = cma_src_addr(id_priv);
cf53936f 1586 svc_id = rdma_get_service_id(&id_priv->id, addr);
406b6a25 1587 if (cma_any_addr(addr) && !id_priv->afonly)
e51060f0
SH		 1588 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1589 else {
1590 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1591 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1592 }
1593
1594 if (ret) {
1595 ib_destroy_cm_id(id_priv->cm_id.ib);
1596 id_priv->cm_id.ib = NULL;
1597 }
1598
1599 return ret;
1600}
1601
07ebafba
TT		 1602static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1603{
1604 int ret;
0c9361fc
JM		 1605 struct iw_cm_id *id;
1606
1607 id = iw_create_cm_id(id_priv->id.device,
1608 iw_conn_req_handler,
1609 id_priv);
1610 if (IS_ERR(id))
1611 return PTR_ERR(id);
07ebafba 1612
0c9361fc 1613 id_priv->cm_id.iw = id;
07ebafba 1614
24d44a39
SW		 1615 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
1616 rdma_addr_size(cma_src_addr(id_priv)));
07ebafba
TT		 1617
1618 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1619
1620 if (ret) {
1621 iw_destroy_cm_id(id_priv->cm_id.iw);
1622 id_priv->cm_id.iw = NULL;
1623 }
1624
1625 return ret;
1626}
1627
e51060f0
SH		 1628static int cma_listen_handler(struct rdma_cm_id *id,
1629 struct rdma_cm_event *event)
1630{
1631 struct rdma_id_private *id_priv = id->context;
1632
1633 id->context = id_priv->id.context;
1634 id->event_handler = id_priv->id.event_handler;
1635 return id_priv->id.event_handler(id, event);
1636}
1637
1638static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1639 struct cma_device *cma_dev)
1640{
1641 struct rdma_id_private *dev_id_priv;
1642 struct rdma_cm_id *id;
1643 int ret;
1644
94d0c939
SH		 1645 if (cma_family(id_priv) == AF_IB &&
1646 rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB)
1647 return;
1648
b26f9b99
SH		 1649 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1650 id_priv->id.qp_type);
e51060f0
SH		 1651 if (IS_ERR(id))
1652 return;
1653
1654 dev_id_priv = container_of(id, struct rdma_id_private, id);
1655
550e5ca7 1656 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
f4753834
SH		 1657 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
1658 rdma_addr_size(cma_src_addr(id_priv)));
e51060f0
SH		 1659
1660 cma_attach_to_dev(dev_id_priv, cma_dev);
1661 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1662 atomic_inc(&id_priv->refcount);
1663 dev_id_priv->internal_id = 1;
5b0ec991 1664 dev_id_priv->afonly = id_priv->afonly;
e51060f0
SH		 1665
1666 ret = rdma_listen(id, id_priv->backlog);
1667 if (ret)
d02d1f53 1668 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1669 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1670}
1671
1672static void cma_listen_on_all(struct rdma_id_private *id_priv)
1673{
1674 struct cma_device *cma_dev;
1675
1676 mutex_lock(&lock);
1677 list_add_tail(&id_priv->list, &listen_any_list);
1678 list_for_each_entry(cma_dev, &dev_list, list)
1679 cma_listen_on_dev(id_priv, cma_dev);
1680 mutex_unlock(&lock);
1681}
1682
a81c994d
SH		 1683void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1684{
1685 struct rdma_id_private *id_priv;
1686
1687 id_priv = container_of(id, struct rdma_id_private, id);
1688 id_priv->tos = (u8) tos;
1689}
1690EXPORT_SYMBOL(rdma_set_service_type);
1691
e51060f0
SH		 1692static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1693 void *context)
1694{
1695 struct cma_work *work = context;
1696 struct rdma_route *route;
1697
1698 route = &work->id->id.route;
1699
1700 if (!status) {
1701 route->num_paths = 1;
1702 *route->path_rec = *path_rec;
1703 } else {
550e5ca7
NM		 1704 work->old_state = RDMA_CM_ROUTE_QUERY;
1705 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0 1706 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1707 work->event.status = status;
e51060f0
SH		 1708 }
1709
1710 queue_work(cma_wq, &work->work);
1711}
1712
1713static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1714 struct cma_work *work)
1715{
f4753834 1716 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 1717 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1718 ib_sa_comp_mask comp_mask;
1719 struct sockaddr_in6 *sin6;
f68194ca 1720 struct sockaddr_ib *sib;
e51060f0
SH		 1721
1722 memset(&path_rec, 0, sizeof path_rec);
f4753834
SH		 1723 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
1724 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
1725 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
e51060f0 1726 path_rec.numb_path = 1;
962063e6 1727 path_rec.reversible = 1;
cf53936f 1728 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
a81c994d
SH		 1729
1730 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1731 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1732 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1733
f68194ca
SH		 1734 switch (cma_family(id_priv)) {
1735 case AF_INET:
a81c994d
SH		 1736 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1737 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
f68194ca
SH		 1738 break;
1739 case AF_INET6:
f4753834 1740 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
a81c994d
SH		 1741 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1742 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
f68194ca
SH		 1743 break;
1744 case AF_IB:
1745 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
1746 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
1747 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1748 break;
a81c994d 1749 }
e51060f0 1750
c1a0b23b 1751 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1752 id_priv->id.port_num, &path_rec,
1753 comp_mask, timeout_ms,
1754 GFP_KERNEL, cma_query_handler,
1755 work, &id_priv->query);
e51060f0
SH		 1756
1757 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1758}
1759
c4028958 1760static void cma_work_handler(struct work_struct *_work)
e51060f0 1761{
c4028958 1762 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1763 struct rdma_id_private *id_priv = work->id;
1764 int destroy = 0;
1765
de910bd9 1766 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1767 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1768 goto out;
1769
1770 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1771 cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1772 destroy = 1;
1773 }
1774out:
de910bd9 1775 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1776 cma_deref_id(id_priv);
1777 if (destroy)
1778 rdma_destroy_id(&id_priv->id);
1779 kfree(work);
1780}
1781
dd5bdff8
OG		 1782static void cma_ndev_work_handler(struct work_struct *_work)
1783{
1784 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1785 struct rdma_id_private *id_priv = work->id;
1786 int destroy = 0;
1787
1788 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 1789 if (id_priv->state == RDMA_CM_DESTROYING ||
1790 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
dd5bdff8
OG		 1791 goto out;
1792
1793 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1794 cma_exch(id_priv, RDMA_CM_DESTROYING);
dd5bdff8
OG		 1795 destroy = 1;
1796 }
1797
1798out:
1799 mutex_unlock(&id_priv->handler_mutex);
1800 cma_deref_id(id_priv);
1801 if (destroy)
1802 rdma_destroy_id(&id_priv->id);
1803 kfree(work);
1804}
1805
e51060f0
SH		 1806static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1807{
1808 struct rdma_route *route = &id_priv->id.route;
1809 struct cma_work *work;
1810 int ret;
1811
1812 work = kzalloc(sizeof *work, GFP_KERNEL);
1813 if (!work)
1814 return -ENOMEM;
1815
1816 work->id = id_priv;
c4028958 1817 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1818 work->old_state = RDMA_CM_ROUTE_QUERY;
1819 work->new_state = RDMA_CM_ROUTE_RESOLVED;
e51060f0
SH		 1820 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1821
1822 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1823 if (!route->path_rec) {
1824 ret = -ENOMEM;
1825 goto err1;
1826 }
1827
1828 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1829 if (ret)
1830 goto err2;
1831
1832 return 0;
1833err2:
1834 kfree(route->path_rec);
1835 route->path_rec = NULL;
1836err1:
1837 kfree(work);
1838 return ret;
1839}
1840
1841int rdma_set_ib_paths(struct rdma_cm_id *id,
1842 struct ib_sa_path_rec *path_rec, int num_paths)
1843{
1844 struct rdma_id_private *id_priv;
1845 int ret;
1846
1847 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 1848 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1849 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 1850 return -EINVAL;
1851
9893e742
JL		 1852 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1853 GFP_KERNEL);
e51060f0
SH		 1854 if (!id->route.path_rec) {
1855 ret = -ENOMEM;
1856 goto err;
1857 }
1858
ae2d9293 1859 id->route.num_paths = num_paths;
e51060f0
SH		 1860 return 0;
1861err:
550e5ca7 1862 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 1863 return ret;
1864}
1865EXPORT_SYMBOL(rdma_set_ib_paths);
1866
07ebafba
TT		 1867static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1868{
1869 struct cma_work *work;
1870
1871 work = kzalloc(sizeof *work, GFP_KERNEL);
1872 if (!work)
1873 return -ENOMEM;
1874
1875 work->id = id_priv;
c4028958 1876 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1877 work->old_state = RDMA_CM_ROUTE_QUERY;
1878 work->new_state = RDMA_CM_ROUTE_RESOLVED;
07ebafba
TT		 1879 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1880 queue_work(cma_wq, &work->work);
1881 return 0;
1882}
1883
eb072c4b
EP		 1884static int iboe_tos_to_sl(struct net_device *ndev, int tos)
1885{
1886 int prio;
1887 struct net_device *dev;
1888
1889 prio = rt_tos2priority(tos);
1890 dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
1891 vlan_dev_real_dev(ndev) : ndev;
1892
1893 if (dev->num_tc)
1894 return netdev_get_prio_tc_map(dev, prio);
1895
1896#if IS_ENABLED(CONFIG_VLAN_8021Q)
1897 if (ndev->priv_flags & IFF_802_1Q_VLAN)
1898 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
1899 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1900#endif
1901 return 0;
1902}
1903
3c86aa70
EC		 1904static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1905{
1906 struct rdma_route *route = &id_priv->id.route;
1907 struct rdma_addr *addr = &route->addr;
1908 struct cma_work *work;
1909 int ret;
3c86aa70 1910 struct net_device *ndev = NULL;
dd5f03be 1911
3c86aa70 1912
3c86aa70
EC		 1913 work = kzalloc(sizeof *work, GFP_KERNEL);
1914 if (!work)
1915 return -ENOMEM;
1916
1917 work->id = id_priv;
1918 INIT_WORK(&work->work, cma_work_handler);
1919
1920 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1921 if (!route->path_rec) {
1922 ret = -ENOMEM;
1923 goto err1;
1924 }
1925
1926 route->num_paths = 1;
1927
3c86aa70
EC		 1928 if (addr->dev_addr.bound_dev_if)
1929 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1930 if (!ndev) {
1931 ret = -ENODEV;
1932 goto err2;
1933 }
1934
dd5f03be
MB		 1935 route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev);
1936 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
1937 memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len);
af7bd463 1938
7b85627b
MS		 1939 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
1940 &route->path_rec->sgid);
1941 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
1942 &route->path_rec->dgid);
af7bd463
EC		 1943
1944 route->path_rec->hop_limit = 1;
1945 route->path_rec->reversible = 1;
1946 route->path_rec->pkey = cpu_to_be16(0xffff);
1947 route->path_rec->mtu_selector = IB_SA_EQ;
eb072c4b 1948 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
3c86aa70
EC		 1949 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1950 route->path_rec->rate_selector = IB_SA_EQ;
1951 route->path_rec->rate = iboe_get_rate(ndev);
1952 dev_put(ndev);
1953 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1954 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1955 if (!route->path_rec->mtu) {
1956 ret = -EINVAL;
1957 goto err2;
1958 }
1959
550e5ca7
NM		 1960 work->old_state = RDMA_CM_ROUTE_QUERY;
1961 work->new_state = RDMA_CM_ROUTE_RESOLVED;
3c86aa70
EC		 1962 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1963 work->event.status = 0;
1964
1965 queue_work(cma_wq, &work->work);
1966
1967 return 0;
1968
1969err2:
1970 kfree(route->path_rec);
1971 route->path_rec = NULL;
1972err1:
1973 kfree(work);
1974 return ret;
1975}
1976
e51060f0
SH		 1977int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1978{
1979 struct rdma_id_private *id_priv;
1980 int ret;
1981
1982 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1983 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 1984 return -EINVAL;
1985
1986 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1987 switch (rdma_node_get_transport(id->device->node_type)) {
1988 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 1989 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1990 case IB_LINK_LAYER_INFINIBAND:
1991 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1992 break;
1993 case IB_LINK_LAYER_ETHERNET:
1994 ret = cma_resolve_iboe_route(id_priv);
1995 break;
1996 default:
1997 ret = -ENOSYS;
1998 }
e51060f0 1999 break;
07ebafba
TT		 2000 case RDMA_TRANSPORT_IWARP:
2001 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2002 break;
e51060f0
SH		 2003 default:
2004 ret = -ENOSYS;
2005 break;
2006 }
2007 if (ret)
2008 goto err;
2009
2010 return 0;
2011err:
550e5ca7 2012 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 2013 cma_deref_id(id_priv);
2014 return ret;
2015}
2016EXPORT_SYMBOL(rdma_resolve_route);
2017
6a3e362d
SH		 2018static void cma_set_loopback(struct sockaddr *addr)
2019{
2020 switch (addr->sa_family) {
2021 case AF_INET:
2022 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2023 break;
2024 case AF_INET6:
2025 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2026 0, 0, 0, htonl(1));
2027 break;
2028 default:
2029 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2030 0, 0, 0, htonl(1));
2031 break;
2032 }
2033}
2034
e51060f0
SH		 2035static int cma_bind_loopback(struct rdma_id_private *id_priv)
2036{
b0569e40 2037 struct cma_device *cma_dev, *cur_dev;
e51060f0 2038 struct ib_port_attr port_attr;
f0ee3404 2039 union ib_gid gid;
e51060f0
SH		 2040 u16 pkey;
2041 int ret;
2042 u8 p;
2043
b0569e40 2044 cma_dev = NULL;
e51060f0 2045 mutex_lock(&lock);
b0569e40
SH		 2046 list_for_each_entry(cur_dev, &dev_list, list) {
2047 if (cma_family(id_priv) == AF_IB &&
2048 rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
2049 continue;
2050
2051 if (!cma_dev)
2052 cma_dev = cur_dev;
2053
2054 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2055 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2056 port_attr.state == IB_PORT_ACTIVE) {
2057 cma_dev = cur_dev;
2058 goto port_found;
2059 }
2060 }
2061 }
2062
2063 if (!cma_dev) {
e82153b5
KK		 2064 ret = -ENODEV;
2065 goto out;
2066 }
e51060f0 2067
e82153b5 2068 p = 1;
e51060f0
SH		 2069
2070port_found:
f0ee3404 2071 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 2072 if (ret)
2073 goto out;
2074
2075 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2076 if (ret)
2077 goto out;
2078
6f8372b6 2079 id_priv->id.route.addr.dev_addr.dev_type =
3c86aa70 2080 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
6f8372b6
SH		 2081 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2082
2083 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 2084 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2085 id_priv->id.port_num = p;
2086 cma_attach_to_dev(id_priv, cma_dev);
f4753834 2087 cma_set_loopback(cma_src_addr(id_priv));
e51060f0
SH		 2088out:
2089 mutex_unlock(&lock);
2090 return ret;
2091}
2092
2093static void addr_handler(int status, struct sockaddr *src_addr,
2094 struct rdma_dev_addr *dev_addr, void *context)
2095{
2096 struct rdma_id_private *id_priv = context;
a1b1b61f 2097 struct rdma_cm_event event;
e51060f0 2098
a1b1b61f 2099 memset(&event, 0, sizeof event);
de910bd9 2100 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 2101 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2102 RDMA_CM_ADDR_RESOLVED))
61a73c70 2103 goto out;
61a73c70 2104
7b85627b 2105 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
61a73c70 2106 if (!status && !id_priv->cma_dev)
be9130cc 2107 status = cma_acquire_dev(id_priv, NULL);
e51060f0
SH		 2108
2109 if (status) {
550e5ca7
NM		 2110 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2111 RDMA_CM_ADDR_BOUND))
e51060f0 2112 goto out;
a1b1b61f
SH		 2113 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2114 event.status = status;
7b85627b 2115 } else
a1b1b61f 2116 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0 2117
a1b1b61f 2118 if (id_priv->id.event_handler(&id_priv->id, &event)) {
550e5ca7 2119 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2120 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2121 cma_deref_id(id_priv);
2122 rdma_destroy_id(&id_priv->id);
2123 return;
2124 }
2125out:
de910bd9 2126 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 2127 cma_deref_id(id_priv);
2128}
2129
2130static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2131{
2132 struct cma_work *work;
f0ee3404 2133 union ib_gid gid;
e51060f0
SH		 2134 int ret;
2135
2136 work = kzalloc(sizeof *work, GFP_KERNEL);
2137 if (!work)
2138 return -ENOMEM;
2139
2140 if (!id_priv->cma_dev) {
2141 ret = cma_bind_loopback(id_priv);
2142 if (ret)
2143 goto err;
2144 }
2145
6f8372b6
SH		 2146 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2147 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2148
e51060f0 2149 work->id = id_priv;
c4028958 2150 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2151 work->old_state = RDMA_CM_ADDR_QUERY;
2152 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0
SH		 2153 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2154 queue_work(cma_wq, &work->work);
2155 return 0;
2156err:
2157 kfree(work);
2158 return ret;
2159}
2160
f17df3b0
SH		 2161static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2162{
2163 struct cma_work *work;
2164 int ret;
2165
2166 work = kzalloc(sizeof *work, GFP_KERNEL);
2167 if (!work)
2168 return -ENOMEM;
2169
2170 if (!id_priv->cma_dev) {
2171 ret = cma_resolve_ib_dev(id_priv);
2172 if (ret)
2173 goto err;
2174 }
2175
2176 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2177 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2178
2179 work->id = id_priv;
2180 INIT_WORK(&work->work, cma_work_handler);
2181 work->old_state = RDMA_CM_ADDR_QUERY;
2182 work->new_state = RDMA_CM_ADDR_RESOLVED;
2183 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2184 queue_work(cma_wq, &work->work);
2185 return 0;
2186err:
2187 kfree(work);
2188 return ret;
2189}
2190
e51060f0
SH		 2191static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2192 struct sockaddr *dst_addr)
2193{
d14714df
SH		 2194 if (!src_addr || !src_addr->sa_family) {
2195 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
f17df3b0
SH		 2196 src_addr->sa_family = dst_addr->sa_family;
2197 if (dst_addr->sa_family == AF_INET6) {
d14714df
SH		 2198 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2199 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
f17df3b0
SH		 2200 } else if (dst_addr->sa_family == AF_IB) {
2201 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2202 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
d14714df
SH		 2203 }
2204 }
2205 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2206}
2207
2208int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2209 struct sockaddr *dst_addr, int timeout_ms)
2210{
2211 struct rdma_id_private *id_priv;
2212 int ret;
2213
2214 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2215 if (id_priv->state == RDMA_CM_IDLE) {
e51060f0
SH		 2216 ret = cma_bind_addr(id, src_addr, dst_addr);
2217 if (ret)
2218 return ret;
2219 }
2220
4ae7152e
SH		 2221 if (cma_family(id_priv) != dst_addr->sa_family)
2222 return -EINVAL;
2223
550e5ca7 2224 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
e51060f0
SH		 2225 return -EINVAL;
2226
2227 atomic_inc(&id_priv->refcount);
f4753834 2228 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
f17df3b0 2229 if (cma_any_addr(dst_addr)) {
e51060f0 2230 ret = cma_resolve_loopback(id_priv);
f17df3b0
SH		 2231 } else {
2232 if (dst_addr->sa_family == AF_IB) {
2233 ret = cma_resolve_ib_addr(id_priv);
2234 } else {
2235 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2236 dst_addr, &id->route.addr.dev_addr,
2237 timeout_ms, addr_handler, id_priv);
2238 }
2239 }
e51060f0
SH		 2240 if (ret)
2241 goto err;
2242
2243 return 0;
2244err:
550e5ca7 2245 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 2246 cma_deref_id(id_priv);
2247 return ret;
2248}
2249EXPORT_SYMBOL(rdma_resolve_addr);
2250
a9bb7912
HS		 2251int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2252{
2253 struct rdma_id_private *id_priv;
2254 unsigned long flags;
2255 int ret;
2256
2257 id_priv = container_of(id, struct rdma_id_private, id);
2258 spin_lock_irqsave(&id_priv->lock, flags);
c8dea2f9 2259 if (reuse || id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 2260 id_priv->reuseaddr = reuse;
2261 ret = 0;
2262 } else {
2263 ret = -EINVAL;
2264 }
2265 spin_unlock_irqrestore(&id_priv->lock, flags);
2266 return ret;
2267}
2268EXPORT_SYMBOL(rdma_set_reuseaddr);
2269
68602120
SH		 2270int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2271{
2272 struct rdma_id_private *id_priv;
2273 unsigned long flags;
2274 int ret;
2275
2276 id_priv = container_of(id, struct rdma_id_private, id);
2277 spin_lock_irqsave(&id_priv->lock, flags);
2278 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2279 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2280 id_priv->afonly = afonly;
2281 ret = 0;
2282 } else {
2283 ret = -EINVAL;
2284 }
2285 spin_unlock_irqrestore(&id_priv->lock, flags);
2286 return ret;
2287}
2288EXPORT_SYMBOL(rdma_set_afonly);
2289
e51060f0
SH		 2290static void cma_bind_port(struct rdma_bind_list *bind_list,
2291 struct rdma_id_private *id_priv)
2292{
58afdcb7
SH		 2293 struct sockaddr *addr;
2294 struct sockaddr_ib *sib;
2295 u64 sid, mask;
2296 __be16 port;
e51060f0 2297
f4753834 2298 addr = cma_src_addr(id_priv);
58afdcb7
SH		 2299 port = htons(bind_list->port);
2300
2301 switch (addr->sa_family) {
2302 case AF_INET:
2303 ((struct sockaddr_in *) addr)->sin_port = port;
2304 break;
2305 case AF_INET6:
2306 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2307 break;
2308 case AF_IB:
2309 sib = (struct sockaddr_ib *) addr;
2310 sid = be64_to_cpu(sib->sib_sid);
2311 mask = be64_to_cpu(sib->sib_sid_mask);
2312 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2313 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2314 break;
2315 }
e51060f0
SH		 2316 id_priv->bind_list = bind_list;
2317 hlist_add_head(&id_priv->node, &bind_list->owners);
2318}
2319
2320static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2321 unsigned short snum)
2322{
2323 struct rdma_bind_list *bind_list;
3b069c5d 2324 int ret;
e51060f0 2325
cb164b8c 2326 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2327 if (!bind_list)
2328 return -ENOMEM;
2329
3b069c5d
TH		 2330 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2331 if (ret < 0)
2332 goto err;
aedec080
SH		 2333
2334 bind_list->ps = ps;
3b069c5d 2335 bind_list->port = (unsigned short)ret;
aedec080
SH		 2336 cma_bind_port(bind_list, id_priv);
2337 return 0;
3b069c5d 2338err:
aedec080 2339 kfree(bind_list);
3b069c5d 2340 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
aedec080 2341}
e51060f0 2342
aedec080
SH		 2343static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2344{
5d7220e8
TH		 2345 static unsigned int last_used_port;
2346 int low, high, remaining;
2347 unsigned int rover;
e51060f0 2348
0bbf87d8 2349 inet_get_local_port_range(&init_net, &low, &high);
5d7220e8 2350 remaining = (high - low) + 1;
63862b5b 2351 rover = prandom_u32() % remaining + low;
5d7220e8
TH		 2352retry:
2353 if (last_used_port != rover &&
2354 !idr_find(ps, (unsigned short) rover)) {
2355 int ret = cma_alloc_port(ps, id_priv, rover);
2356 /*
2357 * Remember previously used port number in order to avoid
2358 * re-using same port immediately after it is closed.
2359 */
2360 if (!ret)
2361 last_used_port = rover;
2362 if (ret != -EADDRNOTAVAIL)
2363 return ret;
e51060f0 2364 }
5d7220e8
TH		 2365 if (--remaining) {
2366 rover++;
2367 if ((rover < low) || (rover > high))
2368 rover = low;
2369 goto retry;
2370 }
2371 return -EADDRNOTAVAIL;
e51060f0
SH		 2372}
2373
a9bb7912
HS		 2374/*
2375 * Check that the requested port is available. This is called when trying to
2376 * bind to a specific port, or when trying to listen on a bound port. In
2377 * the latter case, the provided id_priv may already be on the bind_list, but
2378 * we still need to check that it's okay to start listening.
2379 */
2380static int cma_check_port(struct rdma_bind_list *bind_list,
2381 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 2382{
2383 struct rdma_id_private *cur_id;
43b752da 2384 struct sockaddr *addr, *cur_addr;
e51060f0 2385
f4753834 2386 addr = cma_src_addr(id_priv);
b67bfe0d 2387 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
a9bb7912
HS		 2388 if (id_priv == cur_id)
2389 continue;
3cd96564 2390
5b0ec991
SH		 2391 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2392 cur_id->reuseaddr)
2393 continue;
e51060f0 2394
f4753834 2395 cur_addr = cma_src_addr(cur_id);
5b0ec991
SH		 2396 if (id_priv->afonly && cur_id->afonly &&
2397 (addr->sa_family != cur_addr->sa_family))
2398 continue;
2399
2400 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2401 return -EADDRNOTAVAIL;
2402
2403 if (!cma_addr_cmp(addr, cur_addr))
2404 return -EADDRINUSE;
a9bb7912 2405 }
e51060f0
SH		 2406 return 0;
2407}
2408
a9bb7912
HS		 2409static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2410{
2411 struct rdma_bind_list *bind_list;
2412 unsigned short snum;
2413 int ret;
2414
f4753834 2415 snum = ntohs(cma_port(cma_src_addr(id_priv)));
a9bb7912
HS		 2416 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2417 return -EACCES;
2418
2419 bind_list = idr_find(ps, snum);
2420 if (!bind_list) {
2421 ret = cma_alloc_port(ps, id_priv, snum);
2422 } else {
2423 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2424 if (!ret)
2425 cma_bind_port(bind_list, id_priv);
2426 }
2427 return ret;
2428}
2429
2430static int cma_bind_listen(struct rdma_id_private *id_priv)
2431{
2432 struct rdma_bind_list *bind_list = id_priv->bind_list;
2433 int ret = 0;
2434
2435 mutex_lock(&lock);
2436 if (bind_list->owners.first->next)
2437 ret = cma_check_port(bind_list, id_priv, 0);
2438 mutex_unlock(&lock);
2439 return ret;
2440}
2441
58afdcb7 2442static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
e51060f0 2443{
e51060f0 2444 switch (id_priv->id.ps) {
e51060f0 2445 case RDMA_PS_TCP:
58afdcb7 2446 return &tcp_ps;
628e5f6d 2447 case RDMA_PS_UDP:
58afdcb7 2448 return &udp_ps;
c8f6a362 2449 case RDMA_PS_IPOIB:
58afdcb7 2450 return &ipoib_ps;
2d2e9415 2451 case RDMA_PS_IB:
58afdcb7 2452 return &ib_ps;
e51060f0 2453 default:
58afdcb7
SH		 2454 return NULL;
2455 }
2456}
2457
2458static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
2459{
2460 struct idr *ps = NULL;
2461 struct sockaddr_ib *sib;
2462 u64 sid_ps, mask, sid;
2463
f4753834 2464 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
58afdcb7
SH		 2465 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2466 sid = be64_to_cpu(sib->sib_sid) & mask;
2467
2468 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2469 sid_ps = RDMA_IB_IP_PS_IB;
2470 ps = &ib_ps;
2471 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2472 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2473 sid_ps = RDMA_IB_IP_PS_TCP;
2474 ps = &tcp_ps;
2475 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2476 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2477 sid_ps = RDMA_IB_IP_PS_UDP;
2478 ps = &udp_ps;
e51060f0
SH		 2479 }
2480
58afdcb7
SH		 2481 if (ps) {
2482 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2483 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2484 be64_to_cpu(sib->sib_sid_mask));
2485 }
2486 return ps;
2487}
2488
2489static int cma_get_port(struct rdma_id_private *id_priv)
2490{
2491 struct idr *ps;
2492 int ret;
2493
f4753834 2494 if (cma_family(id_priv) != AF_IB)
58afdcb7
SH		 2495 ps = cma_select_inet_ps(id_priv);
2496 else
2497 ps = cma_select_ib_ps(id_priv);
2498 if (!ps)
2499 return -EPROTONOSUPPORT;
2500
e51060f0 2501 mutex_lock(&lock);
f4753834 2502 if (cma_any_port(cma_src_addr(id_priv)))
aedec080 2503 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2504 else
2505 ret = cma_use_port(ps, id_priv);
2506 mutex_unlock(&lock);
2507
2508 return ret;
2509}
2510
d14714df
SH		 2511static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2512 struct sockaddr *addr)
2513{
d90f9b35 2514#if IS_ENABLED(CONFIG_IPV6)
d14714df
SH		 2515 struct sockaddr_in6 *sin6;
2516
2517 if (addr->sa_family != AF_INET6)
2518 return 0;
2519
2520 sin6 = (struct sockaddr_in6 *) addr;
5462eddd
SK		 2521
2522 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
2523 return 0;
2524
2525 if (!sin6->sin6_scope_id)
d14714df
SH		 2526 return -EINVAL;
2527
2528 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2529#endif
2530 return 0;
2531}
2532
a9bb7912
HS		 2533int rdma_listen(struct rdma_cm_id *id, int backlog)
2534{
2535 struct rdma_id_private *id_priv;
2536 int ret;
2537
2538 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2539 if (id_priv->state == RDMA_CM_IDLE) {
f4753834
SH		 2540 id->route.addr.src_addr.ss_family = AF_INET;
2541 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
a9bb7912
HS		 2542 if (ret)
2543 return ret;
2544 }
2545
550e5ca7 2546 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
a9bb7912
HS		 2547 return -EINVAL;
2548
2549 if (id_priv->reuseaddr) {
2550 ret = cma_bind_listen(id_priv);
2551 if (ret)
2552 goto err;
2553 }
2554
2555 id_priv->backlog = backlog;
2556 if (id->device) {
2557 switch (rdma_node_get_transport(id->device->node_type)) {
2558 case RDMA_TRANSPORT_IB:
2559 ret = cma_ib_listen(id_priv);
2560 if (ret)
2561 goto err;
2562 break;
2563 case RDMA_TRANSPORT_IWARP:
2564 ret = cma_iw_listen(id_priv, backlog);
2565 if (ret)
2566 goto err;
2567 break;
2568 default:
2569 ret = -ENOSYS;
2570 goto err;
2571 }
2572 } else
2573 cma_listen_on_all(id_priv);
2574
2575 return 0;
2576err:
2577 id_priv->backlog = 0;
550e5ca7 2578 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 2579 return ret;
2580}
2581EXPORT_SYMBOL(rdma_listen);
2582
e51060f0
SH		 2583int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2584{
2585 struct rdma_id_private *id_priv;
2586 int ret;
2587
680f920a
SH		 2588 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2589 addr->sa_family != AF_IB)
e51060f0
SH		 2590 return -EAFNOSUPPORT;
2591
2592 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2593 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 2594 return -EINVAL;
2595
d14714df
SH		 2596 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2597 if (ret)
2598 goto err1;
2599
7b85627b 2600 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
8523c048 2601 if (!cma_any_addr(addr)) {
680f920a 2602 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
e51060f0 2603 if (ret)
255d0c14
KK		 2604 goto err1;
2605
be9130cc 2606 ret = cma_acquire_dev(id_priv, NULL);
255d0c14
KK		 2607 if (ret)
2608 goto err1;
e51060f0
SH		 2609 }
2610
68602120
SH		 2611 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2612 if (addr->sa_family == AF_INET)
2613 id_priv->afonly = 1;
5b0ec991 2614#if IS_ENABLED(CONFIG_IPV6)
68602120
SH		 2615 else if (addr->sa_family == AF_INET6)
2616 id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
5b0ec991 2617#endif
68602120 2618 }
e51060f0
SH		 2619 ret = cma_get_port(id_priv);
2620 if (ret)
255d0c14 2621 goto err2;
e51060f0
SH		 2622
2623 return 0;
255d0c14 2624err2:
a396d43a
SH		 2625 if (id_priv->cma_dev)
2626 cma_release_dev(id_priv);
255d0c14 2627err1:
550e5ca7 2628 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 2629 return ret;
2630}
2631EXPORT_SYMBOL(rdma_bind_addr);
2632
f4753834 2633static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
e51060f0 2634{
e51060f0 2635 struct cma_hdr *cma_hdr;
e51060f0 2636
01602f11
SH		 2637 cma_hdr = hdr;
2638 cma_hdr->cma_version = CMA_VERSION;
f4753834 2639 if (cma_family(id_priv) == AF_INET) {
1f5175ad
AS		 2640 struct sockaddr_in *src4, *dst4;
2641
f4753834
SH		 2642 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
2643 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
1f5175ad 2644
01602f11
SH		 2645 cma_set_ip_ver(cma_hdr, 4);
2646 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2647 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2648 cma_hdr->port = src4->sin_port;
e8160e15 2649 } else if (cma_family(id_priv) == AF_INET6) {
1f5175ad
AS		 2650 struct sockaddr_in6 *src6, *dst6;
2651
f4753834
SH		 2652 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2653 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
1f5175ad 2654
01602f11
SH		 2655 cma_set_ip_ver(cma_hdr, 6);
2656 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2657 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2658 cma_hdr->port = src6->sin6_port;
e51060f0
SH		 2659 }
2660 return 0;
2661}
2662
628e5f6d
SH		 2663static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2664 struct ib_cm_event *ib_event)
2665{
2666 struct rdma_id_private *id_priv = cm_id->context;
2667 struct rdma_cm_event event;
2668 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2669 int ret = 0;
2670
550e5ca7 2671 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
8aa08602 2672 return 0;
628e5f6d 2673
8aa08602 2674 memset(&event, 0, sizeof event);
628e5f6d
SH		 2675 switch (ib_event->event) {
2676 case IB_CM_SIDR_REQ_ERROR:
2677 event.event = RDMA_CM_EVENT_UNREACHABLE;
2678 event.status = -ETIMEDOUT;
2679 break;
2680 case IB_CM_SIDR_REP_RECEIVED:
2681 event.param.ud.private_data = ib_event->private_data;
2682 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2683 if (rep->status != IB_SIDR_SUCCESS) {
2684 event.event = RDMA_CM_EVENT_UNREACHABLE;
2685 event.status = ib_event->param.sidr_rep_rcvd.status;
2686 break;
2687 }
5c438135 2688 ret = cma_set_qkey(id_priv, rep->qkey);
d2ca39f2
YE		 2689 if (ret) {
2690 event.event = RDMA_CM_EVENT_ADDR_ERROR;
5c438135 2691 event.status = ret;
628e5f6d
SH		 2692 break;
2693 }
2694 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2695 id_priv->id.route.path_rec,
2696 &event.param.ud.ah_attr);
2697 event.param.ud.qp_num = rep->qpn;
2698 event.param.ud.qkey = rep->qkey;
2699 event.event = RDMA_CM_EVENT_ESTABLISHED;
2700 event.status = 0;
2701 break;
2702 default:
468f2239 2703 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2704 ib_event->event);
2705 goto out;
2706 }
2707
2708 ret = id_priv->id.event_handler(&id_priv->id, &event);
2709 if (ret) {
2710 /* Destroy the CM ID by returning a non-zero value. */
2711 id_priv->cm_id.ib = NULL;
550e5ca7 2712 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2713 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2714 rdma_destroy_id(&id_priv->id);
2715 return ret;
2716 }
2717out:
de910bd9 2718 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2719 return ret;
2720}
2721
2722static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2723 struct rdma_conn_param *conn_param)
2724{
2725 struct ib_cm_sidr_req_param req;
0c9361fc 2726 struct ib_cm_id *id;
e511d1ae 2727 void *private_data;
e8160e15 2728 int offset, ret;
628e5f6d 2729
e511d1ae 2730 memset(&req, 0, sizeof req);
e8160e15
SH		 2731 offset = cma_user_data_offset(id_priv);
2732 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 2733 if (req.private_data_len < conn_param->private_data_len)
2734 return -EINVAL;
2735
e8160e15 2736 if (req.private_data_len) {
e511d1ae
SH		 2737 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2738 if (!private_data)
e8160e15
SH		 2739 return -ENOMEM;
2740 } else {
e511d1ae 2741 private_data = NULL;
e8160e15 2742 }
628e5f6d
SH		 2743
2744 if (conn_param->private_data && conn_param->private_data_len)
e511d1ae
SH		 2745 memcpy(private_data + offset, conn_param->private_data,
2746 conn_param->private_data_len);
628e5f6d 2747
e511d1ae
SH		 2748 if (private_data) {
2749 ret = cma_format_hdr(private_data, id_priv);
e8160e15
SH		 2750 if (ret)
2751 goto out;
e511d1ae 2752 req.private_data = private_data;
e8160e15 2753 }
628e5f6d 2754
0c9361fc
JM		 2755 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2756 id_priv);
2757 if (IS_ERR(id)) {
2758 ret = PTR_ERR(id);
628e5f6d
SH		 2759 goto out;
2760 }
0c9361fc 2761 id_priv->cm_id.ib = id;
628e5f6d 2762
f4753834 2763 req.path = id_priv->id.route.path_rec;
cf53936f 2764 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
628e5f6d
SH		 2765 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2766 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2767
2768 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2769 if (ret) {
2770 ib_destroy_cm_id(id_priv->cm_id.ib);
2771 id_priv->cm_id.ib = NULL;
2772 }
2773out:
e511d1ae 2774 kfree(private_data);
628e5f6d
SH		 2775 return ret;
2776}
2777
e51060f0
SH		 2778static int cma_connect_ib(struct rdma_id_private *id_priv,
2779 struct rdma_conn_param *conn_param)
2780{
2781 struct ib_cm_req_param req;
2782 struct rdma_route *route;
2783 void *private_data;
0c9361fc 2784 struct ib_cm_id *id;
e51060f0
SH		 2785 int offset, ret;
2786
2787 memset(&req, 0, sizeof req);
e8160e15 2788 offset = cma_user_data_offset(id_priv);
e51060f0 2789 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 2790 if (req.private_data_len < conn_param->private_data_len)
2791 return -EINVAL;
2792
e8160e15
SH		 2793 if (req.private_data_len) {
2794 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2795 if (!private_data)
2796 return -ENOMEM;
2797 } else {
2798 private_data = NULL;
2799 }
e51060f0
SH		 2800
2801 if (conn_param->private_data && conn_param->private_data_len)
2802 memcpy(private_data + offset, conn_param->private_data,
2803 conn_param->private_data_len);
2804
0c9361fc
JM		 2805 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2806 if (IS_ERR(id)) {
2807 ret = PTR_ERR(id);
e51060f0
SH		 2808 goto out;
2809 }
0c9361fc 2810 id_priv->cm_id.ib = id;
e51060f0
SH		 2811
2812 route = &id_priv->id.route;
e8160e15
SH		 2813 if (private_data) {
2814 ret = cma_format_hdr(private_data, id_priv);
2815 if (ret)
2816 goto out;
2817 req.private_data = private_data;
2818 }
e51060f0
SH		 2819
2820 req.primary_path = &route->path_rec[0];
2821 if (route->num_paths == 2)
2822 req.alternate_path = &route->path_rec[1];
2823
cf53936f 2824 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
e51060f0 2825 req.qp_num = id_priv->qp_num;
18c441a6 2826 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 2827 req.starting_psn = id_priv->seq_num;
2828 req.responder_resources = conn_param->responder_resources;
2829 req.initiator_depth = conn_param->initiator_depth;
2830 req.flow_control = conn_param->flow_control;
4ede178a
SH		 2831 req.retry_count = min_t(u8, 7, conn_param->retry_count);
2832 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 2833 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2834 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2835 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2836 req.srq = id_priv->srq ? 1 : 0;
2837
2838 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2839out:
0c9361fc
JM		 2840 if (ret && !IS_ERR(id)) {
2841 ib_destroy_cm_id(id);
675a027c
KK		 2842 id_priv->cm_id.ib = NULL;
2843 }
2844
e51060f0
SH		 2845 kfree(private_data);
2846 return ret;
2847}
2848
07ebafba
TT		 2849static int cma_connect_iw(struct rdma_id_private *id_priv,
2850 struct rdma_conn_param *conn_param)
2851{
2852 struct iw_cm_id *cm_id;
07ebafba
TT		 2853 int ret;
2854 struct iw_cm_conn_param iw_param;
2855
2856 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 2857 if (IS_ERR(cm_id))
2858 return PTR_ERR(cm_id);
07ebafba
TT		 2859
2860 id_priv->cm_id.iw = cm_id;
2861
24d44a39
SW		 2862 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
2863 rdma_addr_size(cma_src_addr(id_priv)));
2864 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
2865 rdma_addr_size(cma_dst_addr(id_priv)));
07ebafba 2866
5851bb89 2867 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2868 if (ret)
2869 goto out;
07ebafba 2870
f45ee80e
HS		 2871 if (conn_param) {
2872 iw_param.ord = conn_param->initiator_depth;
2873 iw_param.ird = conn_param->responder_resources;
2874 iw_param.private_data = conn_param->private_data;
2875 iw_param.private_data_len = conn_param->private_data_len;
2876 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2877 } else {
2878 memset(&iw_param, 0, sizeof iw_param);
07ebafba 2879 iw_param.qpn = id_priv->qp_num;
f45ee80e 2880 }
07ebafba
TT		 2881 ret = iw_cm_connect(cm_id, &iw_param);
2882out:
0c9361fc 2883 if (ret) {
675a027c
KK		 2884 iw_destroy_cm_id(cm_id);
2885 id_priv->cm_id.iw = NULL;
2886 }
07ebafba
TT		 2887 return ret;
2888}
2889
e51060f0
SH		 2890int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2891{
2892 struct rdma_id_private *id_priv;
2893 int ret;
2894
2895 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2896 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
e51060f0
SH		 2897 return -EINVAL;
2898
2899 if (!id->qp) {
2900 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2901 id_priv->srq = conn_param->srq;
2902 }
2903
07ebafba
TT		 2904 switch (rdma_node_get_transport(id->device->node_type)) {
2905 case RDMA_TRANSPORT_IB:
b26f9b99 2906 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 2907 ret = cma_resolve_ib_udp(id_priv, conn_param);
2908 else
2909 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2910 break;
07ebafba
TT		 2911 case RDMA_TRANSPORT_IWARP:
2912 ret = cma_connect_iw(id_priv, conn_param);
2913 break;
e51060f0
SH		 2914 default:
2915 ret = -ENOSYS;
2916 break;
2917 }
2918 if (ret)
2919 goto err;
2920
2921 return 0;
2922err:
550e5ca7 2923 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
e51060f0
SH		 2924 return ret;
2925}
2926EXPORT_SYMBOL(rdma_connect);
2927
2928static int cma_accept_ib(struct rdma_id_private *id_priv,
2929 struct rdma_conn_param *conn_param)
2930{
2931 struct ib_cm_rep_param rep;
5851bb89 2932 int ret;
0fe313b0 2933
5851bb89
SH		 2934 ret = cma_modify_qp_rtr(id_priv, conn_param);
2935 if (ret)
2936 goto out;
0fe313b0 2937
5851bb89
SH		 2938 ret = cma_modify_qp_rts(id_priv, conn_param);
2939 if (ret)
2940 goto out;
e51060f0
SH		 2941
2942 memset(&rep, 0, sizeof rep);
2943 rep.qp_num = id_priv->qp_num;
2944 rep.starting_psn = id_priv->seq_num;
2945 rep.private_data = conn_param->private_data;
2946 rep.private_data_len = conn_param->private_data_len;
2947 rep.responder_resources = conn_param->responder_resources;
2948 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2949 rep.failover_accepted = 0;
2950 rep.flow_control = conn_param->flow_control;
4ede178a 2951 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 2952 rep.srq = id_priv->srq ? 1 : 0;
2953
0fe313b0
SH		 2954 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2955out:
2956 return ret;
e51060f0
SH		 2957}
2958
07ebafba
TT		 2959static int cma_accept_iw(struct rdma_id_private *id_priv,
2960 struct rdma_conn_param *conn_param)
2961{
2962 struct iw_cm_conn_param iw_param;
2963 int ret;
2964
5851bb89 2965 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2966 if (ret)
2967 return ret;
2968
2969 iw_param.ord = conn_param->initiator_depth;
2970 iw_param.ird = conn_param->responder_resources;
2971 iw_param.private_data = conn_param->private_data;
2972 iw_param.private_data_len = conn_param->private_data_len;
2973 if (id_priv->id.qp) {
2974 iw_param.qpn = id_priv->qp_num;
2975 } else
2976 iw_param.qpn = conn_param->qp_num;
2977
2978 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2979}
2980
628e5f6d 2981static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
5c438135 2982 enum ib_cm_sidr_status status, u32 qkey,
628e5f6d
SH		 2983 const void *private_data, int private_data_len)
2984{
2985 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2986 int ret;
628e5f6d
SH		 2987
2988 memset(&rep, 0, sizeof rep);
2989 rep.status = status;
2990 if (status == IB_SIDR_SUCCESS) {
5c438135 2991 ret = cma_set_qkey(id_priv, qkey);
d2ca39f2
YE		 2992 if (ret)
2993 return ret;
628e5f6d 2994 rep.qp_num = id_priv->qp_num;
c8f6a362 2995 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2996 }
2997 rep.private_data = private_data;
2998 rep.private_data_len = private_data_len;
2999
3000 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3001}
3002
e51060f0
SH		 3003int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3004{
3005 struct rdma_id_private *id_priv;
3006 int ret;
3007
3008 id_priv = container_of(id, struct rdma_id_private, id);
83e9502d
NM		 3009
3010 id_priv->owner = task_pid_nr(current);
3011
550e5ca7 3012 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
e51060f0
SH		 3013 return -EINVAL;
3014
3015 if (!id->qp && conn_param) {
3016 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 3017 id_priv->srq = conn_param->srq;
3018 }
3019
07ebafba
TT		 3020 switch (rdma_node_get_transport(id->device->node_type)) {
3021 case RDMA_TRANSPORT_IB:
f45ee80e
HS		 3022 if (id->qp_type == IB_QPT_UD) {
3023 if (conn_param)
3024 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3025 conn_param->qkey,
f45ee80e
HS		 3026 conn_param->private_data,
3027 conn_param->private_data_len);
3028 else
3029 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 3030 0, NULL, 0);
f45ee80e
HS		 3031 } else {
3032 if (conn_param)
3033 ret = cma_accept_ib(id_priv, conn_param);
3034 else
3035 ret = cma_rep_recv(id_priv);
3036 }
e51060f0 3037 break;
07ebafba
TT		 3038 case RDMA_TRANSPORT_IWARP:
3039 ret = cma_accept_iw(id_priv, conn_param);
3040 break;
e51060f0
SH		 3041 default:
3042 ret = -ENOSYS;
3043 break;
3044 }
3045
3046 if (ret)
3047 goto reject;
3048
3049 return 0;
3050reject:
c5483388 3051 cma_modify_qp_err(id_priv);
e51060f0
SH		 3052 rdma_reject(id, NULL, 0);
3053 return ret;
3054}
3055EXPORT_SYMBOL(rdma_accept);
3056
0fe313b0
SH		 3057int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3058{
3059 struct rdma_id_private *id_priv;
3060 int ret;
3061
3062 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3063 if (!id_priv->cm_id.ib)
0fe313b0
SH		 3064 return -EINVAL;
3065
3066 switch (id->device->node_type) {
3067 case RDMA_NODE_IB_CA:
3068 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3069 break;
3070 default:
3071 ret = 0;
3072 break;
3073 }
3074 return ret;
3075}
3076EXPORT_SYMBOL(rdma_notify);
3077
e51060f0
SH		 3078int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3079 u8 private_data_len)
3080{
3081 struct rdma_id_private *id_priv;
3082 int ret;
3083
3084 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3085 if (!id_priv->cm_id.ib)
e51060f0
SH		 3086 return -EINVAL;
3087
07ebafba
TT		 3088 switch (rdma_node_get_transport(id->device->node_type)) {
3089 case RDMA_TRANSPORT_IB:
b26f9b99 3090 if (id->qp_type == IB_QPT_UD)
5c438135 3091 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
628e5f6d
SH		 3092 private_data, private_data_len);
3093 else
3094 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3095 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3096 0, private_data, private_data_len);
e51060f0 3097 break;
07ebafba
TT		 3098 case RDMA_TRANSPORT_IWARP:
3099 ret = iw_cm_reject(id_priv->cm_id.iw,
3100 private_data, private_data_len);
3101 break;
e51060f0
SH		 3102 default:
3103 ret = -ENOSYS;
3104 break;
3105 }
3106 return ret;
3107}
3108EXPORT_SYMBOL(rdma_reject);
3109
3110int rdma_disconnect(struct rdma_cm_id *id)
3111{
3112 struct rdma_id_private *id_priv;
3113 int ret;
3114
3115 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 3116 if (!id_priv->cm_id.ib)
e51060f0
SH		 3117 return -EINVAL;
3118
07ebafba
TT		 3119 switch (rdma_node_get_transport(id->device->node_type)) {
3120 case RDMA_TRANSPORT_IB:
c5483388 3121 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 3122 if (ret)
3123 goto out;
e51060f0
SH		 3124 /* Initiate or respond to a disconnect. */
3125 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3126 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3127 break;
07ebafba
TT		 3128 case RDMA_TRANSPORT_IWARP:
3129 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3130 break;
e51060f0 3131 default:
07ebafba 3132 ret = -EINVAL;
e51060f0
SH		 3133 break;
3134 }
3135out:
3136 return ret;
3137}
3138EXPORT_SYMBOL(rdma_disconnect);
3139
c8f6a362
SH		 3140static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3141{
3142 struct rdma_id_private *id_priv;
3143 struct cma_multicast *mc = multicast->context;
3144 struct rdma_cm_event event;
3145 int ret;
3146
3147 id_priv = mc->id_priv;
550e5ca7
NM		 3148 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3149 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
8aa08602 3150 return 0;
c8f6a362 3151
5c438135
SH		 3152 if (!status)
3153 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
c5483388 3154 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 3155 if (!status && id_priv->id.qp)
3156 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
46ea5061 3157 be16_to_cpu(multicast->rec.mlid));
c5483388 3158 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 3159
3160 memset(&event, 0, sizeof event);
3161 event.status = status;
3162 event.param.ud.private_data = mc->context;
3163 if (!status) {
3164 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3165 ib_init_ah_from_mcmember(id_priv->id.device,
3166 id_priv->id.port_num, &multicast->rec,
3167 &event.param.ud.ah_attr);
3168 event.param.ud.qp_num = 0xFFFFFF;
3169 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3170 } else
3171 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3172
3173 ret = id_priv->id.event_handler(&id_priv->id, &event);
3174 if (ret) {
550e5ca7 3175 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 3176 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3177 rdma_destroy_id(&id_priv->id);
3178 return 0;
3179 }
8aa08602 3180
de910bd9 3181 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 3182 return 0;
3183}
3184
3185static void cma_set_mgid(struct rdma_id_private *id_priv,
3186 struct sockaddr *addr, union ib_gid *mgid)
3187{
3188 unsigned char mc_map[MAX_ADDR_LEN];
3189 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3190 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3191 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3192
3193 if (cma_any_addr(addr)) {
3194 memset(mgid, 0, sizeof *mgid);
3195 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 3196 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 3197 0xFF10A01B)) {
3198 /* IPv6 address is an SA assigned MGID. */
3199 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
5bc2b7b3
SH		 3200 } else if (addr->sa_family == AF_IB) {
3201 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
e2e62697
JG		 3202 } else if ((addr->sa_family == AF_INET6)) {
3203 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3204 if (id_priv->id.ps == RDMA_PS_UDP)
3205 mc_map[7] = 0x01; /* Use RDMA CM signature */
3206 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 3207 } else {
a9e527e3 3208 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 3209 if (id_priv->id.ps == RDMA_PS_UDP)
3210 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 3211 *mgid = *(union ib_gid *) (mc_map + 4);
3212 }
3213}
3214
3215static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3216 struct cma_multicast *mc)
3217{
3218 struct ib_sa_mcmember_rec rec;
3219 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3220 ib_sa_comp_mask comp_mask;
3221 int ret;
3222
3223 ib_addr_get_mgid(dev_addr, &rec.mgid);
3224 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3225 &rec.mgid, &rec);
3226 if (ret)
3227 return ret;
3228
5bc2b7b3
SH		 3229 ret = cma_set_qkey(id_priv, 0);
3230 if (ret)
3231 return ret;
3232
3f446754 3233 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
5bc2b7b3 3234 rec.qkey = cpu_to_be32(id_priv->qkey);
6f8372b6 3235 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 3236 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3237 rec.join_state = 1;
3238
3239 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3240 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3241 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3242 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3243 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3244
84adeee9
YE		 3245 if (id_priv->id.ps == RDMA_PS_IPOIB)
3246 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2a22fb8c
DB		 3247 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3248 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3249 IB_SA_MCMEMBER_REC_MTU |
3250 IB_SA_MCMEMBER_REC_HOP_LIMIT;
84adeee9 3251
c8f6a362
SH		 3252 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3253 id_priv->id.port_num, &rec,
3254 comp_mask, GFP_KERNEL,
3255 cma_ib_mc_handler, mc);
8c6ffba0 3256 return PTR_ERR_OR_ZERO(mc->multicast.ib);
c8f6a362
SH		 3257}
3258
3c86aa70
EC		 3259static void iboe_mcast_work_handler(struct work_struct *work)
3260{
3261 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3262 struct cma_multicast *mc = mw->mc;
3263 struct ib_sa_multicast *m = mc->multicast.ib;
3264
3265 mc->multicast.ib->context = mc;
3266 cma_ib_mc_handler(0, m);
3267 kref_put(&mc->mcref, release_mc);
3268 kfree(mw);
3269}
3270
3271static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3272{
3273 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3274 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3275
3276 if (cma_any_addr(addr)) {
3277 memset(mgid, 0, sizeof *mgid);
3278 } else if (addr->sa_family == AF_INET6) {
3279 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3280 } else {
3281 mgid->raw[0] = 0xff;
3282 mgid->raw[1] = 0x0e;
3283 mgid->raw[2] = 0;
3284 mgid->raw[3] = 0;
3285 mgid->raw[4] = 0;
3286 mgid->raw[5] = 0;
3287 mgid->raw[6] = 0;
3288 mgid->raw[7] = 0;
3289 mgid->raw[8] = 0;
3290 mgid->raw[9] = 0;
3291 mgid->raw[10] = 0xff;
3292 mgid->raw[11] = 0xff;
3293 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3294 }
3295}
3296
3297static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3298 struct cma_multicast *mc)
3299{
3300 struct iboe_mcast_work *work;
3301 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3302 int err;
3303 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3304 struct net_device *ndev = NULL;
3305
3306 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3307 return -EINVAL;
3308
3309 work = kzalloc(sizeof *work, GFP_KERNEL);
3310 if (!work)
3311 return -ENOMEM;
3312
3313 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3314 if (!mc->multicast.ib) {
3315 err = -ENOMEM;
3316 goto out1;
3317 }
3318
3319 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3320
3321 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3322 if (id_priv->id.ps == RDMA_PS_UDP)
3323 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3324
3325 if (dev_addr->bound_dev_if)
3326 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3327 if (!ndev) {
3328 err = -ENODEV;
3329 goto out2;
3330 }
3331 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3332 mc->multicast.ib->rec.hop_limit = 1;
3333 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3334 dev_put(ndev);
3335 if (!mc->multicast.ib->rec.mtu) {
3336 err = -EINVAL;
3337 goto out2;
3338 }
7b85627b
MS		 3339 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3340 &mc->multicast.ib->rec.port_gid);
3c86aa70
EC		 3341 work->id = id_priv;
3342 work->mc = mc;
3343 INIT_WORK(&work->work, iboe_mcast_work_handler);
3344 kref_get(&mc->mcref);
3345 queue_work(cma_wq, &work->work);
3346
3347 return 0;
3348
3349out2:
3350 kfree(mc->multicast.ib);
3351out1:
3352 kfree(work);
3353 return err;
3354}
3355
c8f6a362
SH		 3356int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3357 void *context)
3358{
3359 struct rdma_id_private *id_priv;
3360 struct cma_multicast *mc;
3361 int ret;
3362
3363 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 3364 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3365 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 3366 return -EINVAL;
3367
3368 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3369 if (!mc)
3370 return -ENOMEM;
3371
ef560861 3372 memcpy(&mc->addr, addr, rdma_addr_size(addr));
c8f6a362
SH		 3373 mc->context = context;
3374 mc->id_priv = id_priv;
3375
3376 spin_lock(&id_priv->lock);
3377 list_add(&mc->list, &id_priv->mc_list);
3378 spin_unlock(&id_priv->lock);
3379
3380 switch (rdma_node_get_transport(id->device->node_type)) {
3381 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 3382 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3383 case IB_LINK_LAYER_INFINIBAND:
3384 ret = cma_join_ib_multicast(id_priv, mc);
3385 break;
3386 case IB_LINK_LAYER_ETHERNET:
3387 kref_init(&mc->mcref);
3388 ret = cma_iboe_join_multicast(id_priv, mc);
3389 break;
3390 default:
3391 ret = -EINVAL;
3392 }
c8f6a362
SH		 3393 break;
3394 default:
3395 ret = -ENOSYS;
3396 break;
3397 }
3398
3399 if (ret) {
3400 spin_lock_irq(&id_priv->lock);
3401 list_del(&mc->list);
3402 spin_unlock_irq(&id_priv->lock);
3403 kfree(mc);
3404 }
3405 return ret;
3406}
3407EXPORT_SYMBOL(rdma_join_multicast);
3408
3409void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3410{
3411 struct rdma_id_private *id_priv;
3412 struct cma_multicast *mc;
3413
3414 id_priv = container_of(id, struct rdma_id_private, id);
3415 spin_lock_irq(&id_priv->lock);
3416 list_for_each_entry(mc, &id_priv->mc_list, list) {
ef560861 3417 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
c8f6a362
SH		 3418 list_del(&mc->list);
3419 spin_unlock_irq(&id_priv->lock);
3420
3421 if (id->qp)
3422 ib_detach_mcast(id->qp,
3423 &mc->multicast.ib->rec.mgid,
46ea5061 3424 be16_to_cpu(mc->multicast.ib->rec.mlid));
3c86aa70
EC		 3425 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3426 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3427 case IB_LINK_LAYER_INFINIBAND:
3428 ib_sa_free_multicast(mc->multicast.ib);
3429 kfree(mc);
3430 break;
3431 case IB_LINK_LAYER_ETHERNET:
3432 kref_put(&mc->mcref, release_mc);
3433 break;
3434 default:
3435 break;
3436 }
3437 }
c8f6a362
SH		 3438 return;
3439 }
3440 }
3441 spin_unlock_irq(&id_priv->lock);
3442}
3443EXPORT_SYMBOL(rdma_leave_multicast);
3444
dd5bdff8
OG		 3445static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3446{
3447 struct rdma_dev_addr *dev_addr;
3448 struct cma_ndev_work *work;
3449
3450 dev_addr = &id_priv->id.route.addr.dev_addr;
3451
6266ed6e 3452 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 3453 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3454 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3455 ndev->name, &id_priv->id);
3456 work = kzalloc(sizeof *work, GFP_KERNEL);
3457 if (!work)
3458 return -ENOMEM;
3459
3460 INIT_WORK(&work->work, cma_ndev_work_handler);
3461 work->id = id_priv;
3462 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3463 atomic_inc(&id_priv->refcount);
3464 queue_work(cma_wq, &work->work);
3465 }
3466
3467 return 0;
3468}
3469
3470static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
351638e7 3471 void *ptr)
dd5bdff8 3472{
351638e7 3473 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
dd5bdff8
OG		 3474 struct cma_device *cma_dev;
3475 struct rdma_id_private *id_priv;
3476 int ret = NOTIFY_DONE;
3477
3478 if (dev_net(ndev) != &init_net)
3479 return NOTIFY_DONE;
3480
3481 if (event != NETDEV_BONDING_FAILOVER)
3482 return NOTIFY_DONE;
3483
3484 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3485 return NOTIFY_DONE;
3486
3487 mutex_lock(&lock);
3488 list_for_each_entry(cma_dev, &dev_list, list)
3489 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3490 ret = cma_netdev_change(ndev, id_priv);
3491 if (ret)
3492 goto out;
3493 }
3494
3495out:
3496 mutex_unlock(&lock);
3497 return ret;
3498}
3499
3500static struct notifier_block cma_nb = {
3501 .notifier_call = cma_netdev_callback
3502};
3503
e51060f0
SH		 3504static void cma_add_one(struct ib_device *device)
3505{
3506 struct cma_device *cma_dev;
3507 struct rdma_id_private *id_priv;
3508
3509 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3510 if (!cma_dev)
3511 return;
3512
3513 cma_dev->device = device;
e51060f0
SH		 3514
3515 init_completion(&cma_dev->comp);
3516 atomic_set(&cma_dev->refcount, 1);
3517 INIT_LIST_HEAD(&cma_dev->id_list);
3518 ib_set_client_data(device, &cma_client, cma_dev);
3519
3520 mutex_lock(&lock);
3521 list_add_tail(&cma_dev->list, &dev_list);
3522 list_for_each_entry(id_priv, &listen_any_list, list)
3523 cma_listen_on_dev(id_priv, cma_dev);
3524 mutex_unlock(&lock);
e51060f0
SH		 3525}
3526
3527static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3528{
a1b1b61f 3529 struct rdma_cm_event event;
550e5ca7 3530 enum rdma_cm_state state;
de910bd9 3531 int ret = 0;
e51060f0
SH		 3532
3533 /* Record that we want to remove the device */
550e5ca7
NM		 3534 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3535 if (state == RDMA_CM_DESTROYING)
e51060f0
SH		 3536 return 0;
3537
3538 cma_cancel_operation(id_priv, state);
de910bd9 3539 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 3540
3541 /* Check for destruction from another callback. */
550e5ca7 3542 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
de910bd9 3543 goto out;
e51060f0 3544
a1b1b61f
SH		 3545 memset(&event, 0, sizeof event);
3546 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 3547 ret = id_priv->id.event_handler(&id_priv->id, &event);
3548out:
3549 mutex_unlock(&id_priv->handler_mutex);
3550 return ret;
e51060f0
SH		 3551}
3552
3553static void cma_process_remove(struct cma_device *cma_dev)
3554{
e51060f0
SH		 3555 struct rdma_id_private *id_priv;
3556 int ret;
3557
e51060f0
SH		 3558 mutex_lock(&lock);
3559 while (!list_empty(&cma_dev->id_list)) {
3560 id_priv = list_entry(cma_dev->id_list.next,
3561 struct rdma_id_private, list);
3562
d02d1f53 3563 list_del(&id_priv->listen_list);
94de178a 3564 list_del_init(&id_priv->list);
e51060f0
SH		 3565 atomic_inc(&id_priv->refcount);
3566 mutex_unlock(&lock);
3567
d02d1f53 3568 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 3569 cma_deref_id(id_priv);
3570 if (ret)
3571 rdma_destroy_id(&id_priv->id);
3572
3573 mutex_lock(&lock);
3574 }
3575 mutex_unlock(&lock);
3576
3577 cma_deref_dev(cma_dev);
3578 wait_for_completion(&cma_dev->comp);
3579}
3580
3581static void cma_remove_one(struct ib_device *device)
3582{
3583 struct cma_device *cma_dev;
3584
3585 cma_dev = ib_get_client_data(device, &cma_client);
3586 if (!cma_dev)
3587 return;
3588
3589 mutex_lock(&lock);
3590 list_del(&cma_dev->list);
3591 mutex_unlock(&lock);
3592
3593 cma_process_remove(cma_dev);
3594 kfree(cma_dev);
3595}
3596
753f618a
NM		 3597static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3598{
3599 struct nlmsghdr *nlh;
3600 struct rdma_cm_id_stats *id_stats;
3601 struct rdma_id_private *id_priv;
3602 struct rdma_cm_id *id = NULL;
3603 struct cma_device *cma_dev;
3604 int i_dev = 0, i_id = 0;
3605
3606 /*
3607 * We export all of the IDs as a sequence of messages. Each
3608 * ID gets its own netlink message.
3609 */
3610 mutex_lock(&lock);
3611
3612 list_for_each_entry(cma_dev, &dev_list, list) {
3613 if (i_dev < cb->args[0]) {
3614 i_dev++;
3615 continue;
3616 }
3617
3618 i_id = 0;
3619 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3620 if (i_id < cb->args[1]) {
3621 i_id++;
3622 continue;
3623 }
3624
3625 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3626 sizeof *id_stats, RDMA_NL_RDMA_CM,
30dc5e63
TN		 3627 RDMA_NL_RDMA_CM_ID_STATS,
3628 NLM_F_MULTI);
753f618a
NM		 3629 if (!id_stats)
3630 goto out;
3631
3632 memset(id_stats, 0, sizeof *id_stats);
3633 id = &id_priv->id;
3634 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3635 id_stats->port_num = id->port_num;
3636 id_stats->bound_dev_if =
3637 id->route.addr.dev_addr.bound_dev_if;
3638
ce117ffa
SH		 3639 if (ibnl_put_attr(skb, nlh,
3640 rdma_addr_size(cma_src_addr(id_priv)),
3641 cma_src_addr(id_priv),
3642 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3643 goto out;
3644 if (ibnl_put_attr(skb, nlh,
3645 rdma_addr_size(cma_src_addr(id_priv)),
3646 cma_dst_addr(id_priv),
3647 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3648 goto out;
753f618a 3649
83e9502d 3650 id_stats->pid = id_priv->owner;
753f618a
NM		 3651 id_stats->port_space = id->ps;
3652 id_stats->cm_state = id_priv->state;
3653 id_stats->qp_num = id_priv->qp_num;
3654 id_stats->qp_type = id->qp_type;
3655
3656 i_id++;
3657 }
3658
3659 cb->args[1] = 0;
3660 i_dev++;
3661 }
3662
3663out:
3664 mutex_unlock(&lock);
3665 cb->args[0] = i_dev;
3666 cb->args[1] = i_id;
3667
3668 return skb->len;
3669}
3670
3671static const struct ibnl_client_cbs cma_cb_table[] = {
809d5fc9
G		 3672 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3673 .module = THIS_MODULE },
753f618a
NM		 3674};
3675
716abb1f 3676static int __init cma_init(void)
e51060f0 3677{
5d7220e8 3678 int ret;
227b60f5 3679
c7f743a6 3680 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 3681 if (!cma_wq)
3682 return -ENOMEM;
3683
c1a0b23b 3684 ib_sa_register_client(&sa_client);
7a118df3 3685 rdma_addr_register_client(&addr_client);
dd5bdff8 3686 register_netdevice_notifier(&cma_nb);
c1a0b23b 3687
e51060f0
SH		 3688 ret = ib_register_client(&cma_client);
3689 if (ret)
3690 goto err;
753f618a
NM		 3691
3692 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3693 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3694
e51060f0
SH		 3695 return 0;
3696
3697err:
dd5bdff8 3698 unregister_netdevice_notifier(&cma_nb);
7a118df3 3699 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3700 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3701 destroy_workqueue(cma_wq);
3702 return ret;
3703}
3704
716abb1f 3705static void __exit cma_cleanup(void)
e51060f0 3706{
753f618a 3707 ibnl_remove_client(RDMA_NL_RDMA_CM);
e51060f0 3708 ib_unregister_client(&cma_client);
dd5bdff8 3709 unregister_netdevice_notifier(&cma_nb);
7a118df3 3710 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3711 ib_sa_unregister_client(&sa_client);
e51060f0 3712 destroy_workqueue(cma_wq);
e51060f0 3713 idr_destroy(&tcp_ps);
628e5f6d 3714 idr_destroy(&udp_ps);
c8f6a362 3715 idr_destroy(&ipoib_ps);
2d2e9415 3716 idr_destroy(&ib_ps);
e51060f0
SH		 3717}
3718
3719module_init(cma_init);
3720module_exit(cma_cleanup);
Linux kernel - Deliverables
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