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IB/mlx4: Add support for IBoE
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / core / cma.c
CommitLineData
e51060f0
SH		 1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
a9474917
SH		 7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
e51060f0 12 *
a9474917
SH		 13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
e51060f0 16 *
a9474917
SH		 17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
e51060f0 20 *
a9474917
SH		 21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
e51060f0 25 *
a9474917
SH		 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
e51060f0
SH		 34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/idr.h>
07ebafba 42#include <linux/inetdevice.h>
5a0e3ad6 43#include <linux/slab.h>
e51060f0
SH		 44
45#include <net/tcp.h>
1f5175ad 46#include <net/ipv6.h>
e51060f0
SH		 47
48#include <rdma/rdma_cm.h>
49#include <rdma/rdma_cm_ib.h>
50#include <rdma/ib_cache.h>
51#include <rdma/ib_cm.h>
52#include <rdma/ib_sa.h>
07ebafba 53#include <rdma/iw_cm.h>
e51060f0
SH		 54
55MODULE_AUTHOR("Sean Hefty");
56MODULE_DESCRIPTION("Generic RDMA CM Agent");
57MODULE_LICENSE("Dual BSD/GPL");
58
59#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 60#define CMA_MAX_CM_RETRIES 15
dcb3f974 61#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 62#define CMA_IBOE_PACKET_LIFETIME 18
e51060f0
SH		 63
64static void cma_add_one(struct ib_device *device);
65static void cma_remove_one(struct ib_device *device);
66
67static struct ib_client cma_client = {
68 .name = "cma",
69 .add = cma_add_one,
70 .remove = cma_remove_one
71};
72
c1a0b23b 73static struct ib_sa_client sa_client;
7a118df3 74static struct rdma_addr_client addr_client;
e51060f0
SH		 75static LIST_HEAD(dev_list);
76static LIST_HEAD(listen_any_list);
77static DEFINE_MUTEX(lock);
78static struct workqueue_struct *cma_wq;
79static DEFINE_IDR(sdp_ps);
80static DEFINE_IDR(tcp_ps);
628e5f6d 81static DEFINE_IDR(udp_ps);
c8f6a362 82static DEFINE_IDR(ipoib_ps);
e51060f0
SH		 83
84struct cma_device {
85 struct list_head list;
86 struct ib_device *device;
e51060f0
SH		 87 struct completion comp;
88 atomic_t refcount;
89 struct list_head id_list;
90};
91
92enum cma_state {
93 CMA_IDLE,
94 CMA_ADDR_QUERY,
95 CMA_ADDR_RESOLVED,
96 CMA_ROUTE_QUERY,
97 CMA_ROUTE_RESOLVED,
98 CMA_CONNECT,
99 CMA_DISCONNECT,
100 CMA_ADDR_BOUND,
101 CMA_LISTEN,
102 CMA_DEVICE_REMOVAL,
103 CMA_DESTROYING
104};
105
106struct rdma_bind_list {
107 struct idr *ps;
108 struct hlist_head owners;
109 unsigned short port;
110};
111
112/*
113 * Device removal can occur at anytime, so we need extra handling to
114 * serialize notifying the user of device removal with other callbacks.
115 * We do this by disabling removal notification while a callback is in process,
116 * and reporting it after the callback completes.
117 */
118struct rdma_id_private {
119 struct rdma_cm_id id;
120
121 struct rdma_bind_list *bind_list;
122 struct hlist_node node;
d02d1f53
SH		 123 struct list_head list; /* listen_any_list or cma_device.list */
124 struct list_head listen_list; /* per device listens */
e51060f0 125 struct cma_device *cma_dev;
c8f6a362 126 struct list_head mc_list;
e51060f0 127
d02d1f53 128 int internal_id;
e51060f0
SH		 129 enum cma_state state;
130 spinlock_t lock;
c5483388
SH		 131 struct mutex qp_mutex;
132
e51060f0
SH		 133 struct completion comp;
134 atomic_t refcount;
de910bd9 135 struct mutex handler_mutex;
e51060f0
SH		 136
137 int backlog;
138 int timeout_ms;
139 struct ib_sa_query *query;
140 int query_id;
141 union {
142 struct ib_cm_id *ib;
07ebafba 143 struct iw_cm_id *iw;
e51060f0
SH		 144 } cm_id;
145
146 u32 seq_num;
c8f6a362 147 u32 qkey;
e51060f0 148 u32 qp_num;
e51060f0 149 u8 srq;
a81c994d 150 u8 tos;
e51060f0
SH		 151};
152
c8f6a362
SH		 153struct cma_multicast {
154 struct rdma_id_private *id_priv;
155 union {
156 struct ib_sa_multicast *ib;
157 } multicast;
158 struct list_head list;
159 void *context;
3f446754 160 struct sockaddr_storage addr;
3c86aa70 161 struct kref mcref;
c8f6a362
SH		 162};
163
e51060f0
SH		 164struct cma_work {
165 struct work_struct work;
166 struct rdma_id_private *id;
167 enum cma_state old_state;
168 enum cma_state new_state;
169 struct rdma_cm_event event;
170};
171
dd5bdff8
OG		 172struct cma_ndev_work {
173 struct work_struct work;
174 struct rdma_id_private *id;
175 struct rdma_cm_event event;
176};
177
3c86aa70
EC		 178struct iboe_mcast_work {
179 struct work_struct work;
180 struct rdma_id_private *id;
181 struct cma_multicast *mc;
182};
183
e51060f0
SH		 184union cma_ip_addr {
185 struct in6_addr ip6;
186 struct {
1b90c137
AV		 187 __be32 pad[3];
188 __be32 addr;
e51060f0
SH		 189 } ip4;
190};
191
192struct cma_hdr {
193 u8 cma_version;
194 u8 ip_version; /* IP version: 7:4 */
1b90c137 195 __be16 port;
e51060f0
SH		 196 union cma_ip_addr src_addr;
197 union cma_ip_addr dst_addr;
198};
199
200struct sdp_hh {
201 u8 bsdh[16];
202 u8 sdp_version; /* Major version: 7:4 */
203 u8 ip_version; /* IP version: 7:4 */
204 u8 sdp_specific1[10];
1b90c137
AV		 205 __be16 port;
206 __be16 sdp_specific2;
e51060f0
SH		 207 union cma_ip_addr src_addr;
208 union cma_ip_addr dst_addr;
209};
210
211struct sdp_hah {
212 u8 bsdh[16];
213 u8 sdp_version;
214};
215
216#define CMA_VERSION 0x00
217#define SDP_MAJ_VERSION 0x2
218
219static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
220{
221 unsigned long flags;
222 int ret;
223
224 spin_lock_irqsave(&id_priv->lock, flags);
225 ret = (id_priv->state == comp);
226 spin_unlock_irqrestore(&id_priv->lock, flags);
227 return ret;
228}
229
230static int cma_comp_exch(struct rdma_id_private *id_priv,
231 enum cma_state comp, enum cma_state exch)
232{
233 unsigned long flags;
234 int ret;
235
236 spin_lock_irqsave(&id_priv->lock, flags);
237 if ((ret = (id_priv->state == comp)))
238 id_priv->state = exch;
239 spin_unlock_irqrestore(&id_priv->lock, flags);
240 return ret;
241}
242
243static enum cma_state cma_exch(struct rdma_id_private *id_priv,
244 enum cma_state exch)
245{
246 unsigned long flags;
247 enum cma_state old;
248
249 spin_lock_irqsave(&id_priv->lock, flags);
250 old = id_priv->state;
251 id_priv->state = exch;
252 spin_unlock_irqrestore(&id_priv->lock, flags);
253 return old;
254}
255
256static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
257{
258 return hdr->ip_version >> 4;
259}
260
261static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
262{
263 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
264}
265
266static inline u8 sdp_get_majv(u8 sdp_version)
267{
268 return sdp_version >> 4;
269}
270
271static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
272{
273 return hh->ip_version >> 4;
274}
275
276static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
277{
278 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
279}
280
c8f6a362
SH		 281static inline int cma_is_ud_ps(enum rdma_port_space ps)
282{
283 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
284}
285
e51060f0
SH		 286static void cma_attach_to_dev(struct rdma_id_private *id_priv,
287 struct cma_device *cma_dev)
288{
289 atomic_inc(&cma_dev->refcount);
290 id_priv->cma_dev = cma_dev;
291 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 292 id_priv->id.route.addr.dev_addr.transport =
293 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0
SH		 294 list_add_tail(&id_priv->list, &cma_dev->id_list);
295}
296
297static inline void cma_deref_dev(struct cma_device *cma_dev)
298{
299 if (atomic_dec_and_test(&cma_dev->refcount))
300 complete(&cma_dev->comp);
301}
302
3c86aa70
EC		 303static inline void release_mc(struct kref *kref)
304{
305 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
306
307 kfree(mc->multicast.ib);
308 kfree(mc);
309}
310
e51060f0
SH		 311static void cma_detach_from_dev(struct rdma_id_private *id_priv)
312{
313 list_del(&id_priv->list);
314 cma_deref_dev(id_priv->cma_dev);
315 id_priv->cma_dev = NULL;
316}
317
d2ca39f2 318static int cma_set_qkey(struct rdma_id_private *id_priv)
c8f6a362
SH		 319{
320 struct ib_sa_mcmember_rec rec;
321 int ret = 0;
322
d2ca39f2
YE		 323 if (id_priv->qkey)
324 return 0;
325
326 switch (id_priv->id.ps) {
c8f6a362 327 case RDMA_PS_UDP:
d2ca39f2 328 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 329 break;
330 case RDMA_PS_IPOIB:
d2ca39f2
YE		 331 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
332 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
333 id_priv->id.port_num, &rec.mgid,
334 &rec);
335 if (!ret)
336 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 337 break;
338 default:
339 break;
340 }
341 return ret;
342}
343
3c86aa70
EC		 344static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
345{
346 int i;
347 int err;
348 struct ib_port_attr props;
349 union ib_gid tmp;
350
351 err = ib_query_port(device, port_num, &props);
352 if (err)
353 return 1;
354
355 for (i = 0; i < props.gid_tbl_len; ++i) {
356 err = ib_query_gid(device, port_num, i, &tmp);
357 if (err)
358 return 1;
359 if (!memcmp(&tmp, gid, sizeof tmp))
360 return 0;
361 }
362
363 return -EAGAIN;
364}
365
07ebafba 366static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 367{
c8f6a362 368 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 369 struct cma_device *cma_dev;
3c86aa70 370 union ib_gid gid, iboe_gid;
e51060f0 371 int ret = -ENODEV;
3c86aa70
EC		 372 u8 port;
373 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
374 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
e51060f0 375
3c86aa70
EC		 376 iboe_addr_get_sgid(dev_addr, &iboe_gid);
377 memcpy(&gid, dev_addr->src_dev_addr +
378 rdma_addr_gid_offset(dev_addr), sizeof gid);
e51060f0 379 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70
EC		 380 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
381 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
382 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
383 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
384 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
385 else
386 ret = find_gid_port(cma_dev->device, &gid, port);
387
388 if (!ret) {
389 id_priv->id.port_num = port;
390 goto out;
391 } else if (ret == 1)
392 break;
393 }
e51060f0
SH		 394 }
395 }
3c86aa70
EC		 396
397out:
398 if (!ret)
399 cma_attach_to_dev(id_priv, cma_dev);
400
e51060f0
SH		 401 return ret;
402}
403
e51060f0
SH		 404static void cma_deref_id(struct rdma_id_private *id_priv)
405{
406 if (atomic_dec_and_test(&id_priv->refcount))
407 complete(&id_priv->comp);
408}
409
de910bd9 410static int cma_disable_callback(struct rdma_id_private *id_priv,
8aa08602
SH		 411 enum cma_state state)
412{
de910bd9
OG		 413 mutex_lock(&id_priv->handler_mutex);
414 if (id_priv->state != state) {
415 mutex_unlock(&id_priv->handler_mutex);
416 return -EINVAL;
417 }
418 return 0;
e51060f0
SH		 419}
420
6c719f5c
SH		 421static int cma_has_cm_dev(struct rdma_id_private *id_priv)
422{
423 return (id_priv->id.device && id_priv->cm_id.ib);
424}
425
e51060f0
SH		 426struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
427 void *context, enum rdma_port_space ps)
428{
429 struct rdma_id_private *id_priv;
430
431 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
432 if (!id_priv)
433 return ERR_PTR(-ENOMEM);
434
435 id_priv->state = CMA_IDLE;
436 id_priv->id.context = context;
437 id_priv->id.event_handler = event_handler;
438 id_priv->id.ps = ps;
439 spin_lock_init(&id_priv->lock);
c5483388 440 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 441 init_completion(&id_priv->comp);
442 atomic_set(&id_priv->refcount, 1);
de910bd9 443 mutex_init(&id_priv->handler_mutex);
e51060f0 444 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 445 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 446 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
447
448 return &id_priv->id;
449}
450EXPORT_SYMBOL(rdma_create_id);
451
c8f6a362 452static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 453{
454 struct ib_qp_attr qp_attr;
c8f6a362 455 int qp_attr_mask, ret;
e51060f0 456
c8f6a362
SH		 457 qp_attr.qp_state = IB_QPS_INIT;
458 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 459 if (ret)
460 return ret;
461
c8f6a362
SH		 462 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
463 if (ret)
464 return ret;
465
466 qp_attr.qp_state = IB_QPS_RTR;
467 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
468 if (ret)
469 return ret;
470
471 qp_attr.qp_state = IB_QPS_RTS;
472 qp_attr.sq_psn = 0;
473 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
474
475 return ret;
e51060f0
SH		 476}
477
c8f6a362 478static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 479{
480 struct ib_qp_attr qp_attr;
c8f6a362 481 int qp_attr_mask, ret;
07ebafba
TT		 482
483 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 484 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
485 if (ret)
486 return ret;
07ebafba 487
c8f6a362 488 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 489}
490
e51060f0
SH		 491int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
492 struct ib_qp_init_attr *qp_init_attr)
493{
494 struct rdma_id_private *id_priv;
495 struct ib_qp *qp;
496 int ret;
497
498 id_priv = container_of(id, struct rdma_id_private, id);
499 if (id->device != pd->device)
500 return -EINVAL;
501
502 qp = ib_create_qp(pd, qp_init_attr);
503 if (IS_ERR(qp))
504 return PTR_ERR(qp);
505
c8f6a362
SH		 506 if (cma_is_ud_ps(id_priv->id.ps))
507 ret = cma_init_ud_qp(id_priv, qp);
508 else
509 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 510 if (ret)
511 goto err;
512
513 id->qp = qp;
514 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 515 id_priv->srq = (qp->srq != NULL);
516 return 0;
517err:
518 ib_destroy_qp(qp);
519 return ret;
520}
521EXPORT_SYMBOL(rdma_create_qp);
522
523void rdma_destroy_qp(struct rdma_cm_id *id)
524{
c5483388
SH		 525 struct rdma_id_private *id_priv;
526
527 id_priv = container_of(id, struct rdma_id_private, id);
528 mutex_lock(&id_priv->qp_mutex);
529 ib_destroy_qp(id_priv->id.qp);
530 id_priv->id.qp = NULL;
531 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 532}
533EXPORT_SYMBOL(rdma_destroy_qp);
534
5851bb89
SH		 535static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
536 struct rdma_conn_param *conn_param)
e51060f0
SH		 537{
538 struct ib_qp_attr qp_attr;
539 int qp_attr_mask, ret;
540
c5483388
SH		 541 mutex_lock(&id_priv->qp_mutex);
542 if (!id_priv->id.qp) {
543 ret = 0;
544 goto out;
545 }
e51060f0
SH		 546
547 /* Need to update QP attributes from default values. */
548 qp_attr.qp_state = IB_QPS_INIT;
c5483388 549 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 550 if (ret)
c5483388 551 goto out;
e51060f0 552
c5483388 553 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 554 if (ret)
c5483388 555 goto out;
e51060f0
SH		 556
557 qp_attr.qp_state = IB_QPS_RTR;
c5483388 558 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 559 if (ret)
c5483388 560 goto out;
e51060f0 561
5851bb89
SH		 562 if (conn_param)
563 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 564 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
565out:
566 mutex_unlock(&id_priv->qp_mutex);
567 return ret;
e51060f0
SH		 568}
569
5851bb89
SH		 570static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
571 struct rdma_conn_param *conn_param)
e51060f0
SH		 572{
573 struct ib_qp_attr qp_attr;
574 int qp_attr_mask, ret;
575
c5483388
SH		 576 mutex_lock(&id_priv->qp_mutex);
577 if (!id_priv->id.qp) {
578 ret = 0;
579 goto out;
580 }
e51060f0
SH		 581
582 qp_attr.qp_state = IB_QPS_RTS;
c5483388 583 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 584 if (ret)
c5483388 585 goto out;
e51060f0 586
5851bb89
SH		 587 if (conn_param)
588 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 589 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
590out:
591 mutex_unlock(&id_priv->qp_mutex);
592 return ret;
e51060f0
SH		 593}
594
c5483388 595static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 596{
597 struct ib_qp_attr qp_attr;
c5483388 598 int ret;
e51060f0 599
c5483388
SH		 600 mutex_lock(&id_priv->qp_mutex);
601 if (!id_priv->id.qp) {
602 ret = 0;
603 goto out;
604 }
e51060f0
SH		 605
606 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 607 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
608out:
609 mutex_unlock(&id_priv->qp_mutex);
610 return ret;
e51060f0
SH		 611}
612
c8f6a362
SH		 613static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
614 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
615{
616 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
617 int ret;
3c86aa70
EC		 618 u16 pkey;
619
620 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
621 IB_LINK_LAYER_INFINIBAND)
622 pkey = ib_addr_get_pkey(dev_addr);
623 else
624 pkey = 0xffff;
c8f6a362
SH		 625
626 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 627 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 628 if (ret)
629 return ret;
630
631 qp_attr->port_num = id_priv->id.port_num;
632 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
633
634 if (cma_is_ud_ps(id_priv->id.ps)) {
d2ca39f2
YE		 635 ret = cma_set_qkey(id_priv);
636 if (ret)
637 return ret;
638
c8f6a362
SH		 639 qp_attr->qkey = id_priv->qkey;
640 *qp_attr_mask |= IB_QP_QKEY;
641 } else {
642 qp_attr->qp_access_flags = 0;
643 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
644 }
645 return 0;
646}
647
e51060f0
SH		 648int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
649 int *qp_attr_mask)
650{
651 struct rdma_id_private *id_priv;
c8f6a362 652 int ret = 0;
e51060f0
SH		 653
654 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 655 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
656 case RDMA_TRANSPORT_IB:
c8f6a362
SH		 657 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
658 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
659 else
660 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
661 qp_attr_mask);
e51060f0
SH		 662 if (qp_attr->qp_state == IB_QPS_RTR)
663 qp_attr->rq_psn = id_priv->seq_num;
664 break;
07ebafba 665 case RDMA_TRANSPORT_IWARP:
c8f6a362 666 if (!id_priv->cm_id.iw) {
8f076531 667 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 668 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
669 } else
670 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
671 qp_attr_mask);
07ebafba 672 break;
e51060f0
SH		 673 default:
674 ret = -ENOSYS;
675 break;
676 }
677
678 return ret;
679}
680EXPORT_SYMBOL(rdma_init_qp_attr);
681
682static inline int cma_zero_addr(struct sockaddr *addr)
683{
684 struct in6_addr *ip6;
685
686 if (addr->sa_family == AF_INET)
6360a02a
JP		 687 return ipv4_is_zeronet(
688 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
e51060f0
SH		 689 else {
690 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
691 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 692 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 693 }
694}
695
696static inline int cma_loopback_addr(struct sockaddr *addr)
697{
1f5175ad
AS		 698 if (addr->sa_family == AF_INET)
699 return ipv4_is_loopback(
700 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
701 else
702 return ipv6_addr_loopback(
703 &((struct sockaddr_in6 *) addr)->sin6_addr);
e51060f0
SH		 704}
705
706static inline int cma_any_addr(struct sockaddr *addr)
707{
708 return cma_zero_addr(addr) || cma_loopback_addr(addr);
709}
710
628e5f6d
SH		 711static inline __be16 cma_port(struct sockaddr *addr)
712{
713 if (addr->sa_family == AF_INET)
714 return ((struct sockaddr_in *) addr)->sin_port;
715 else
716 return ((struct sockaddr_in6 *) addr)->sin6_port;
717}
718
e51060f0
SH		 719static inline int cma_any_port(struct sockaddr *addr)
720{
628e5f6d 721 return !cma_port(addr);
e51060f0
SH		 722}
723
724static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
1b90c137 725 u8 *ip_ver, __be16 *port,
e51060f0
SH		 726 union cma_ip_addr **src, union cma_ip_addr **dst)
727{
728 switch (ps) {
729 case RDMA_PS_SDP:
730 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
731 SDP_MAJ_VERSION)
732 return -EINVAL;
733
734 *ip_ver = sdp_get_ip_ver(hdr);
735 *port = ((struct sdp_hh *) hdr)->port;
736 *src = &((struct sdp_hh *) hdr)->src_addr;
737 *dst = &((struct sdp_hh *) hdr)->dst_addr;
738 break;
739 default:
740 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
741 return -EINVAL;
742
743 *ip_ver = cma_get_ip_ver(hdr);
744 *port = ((struct cma_hdr *) hdr)->port;
745 *src = &((struct cma_hdr *) hdr)->src_addr;
746 *dst = &((struct cma_hdr *) hdr)->dst_addr;
747 break;
748 }
749
750 if (*ip_ver != 4 && *ip_ver != 6)
751 return -EINVAL;
752 return 0;
753}
754
755static void cma_save_net_info(struct rdma_addr *addr,
756 struct rdma_addr *listen_addr,
1b90c137 757 u8 ip_ver, __be16 port,
e51060f0
SH		 758 union cma_ip_addr *src, union cma_ip_addr *dst)
759{
760 struct sockaddr_in *listen4, *ip4;
761 struct sockaddr_in6 *listen6, *ip6;
762
763 switch (ip_ver) {
764 case 4:
765 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
766 ip4 = (struct sockaddr_in *) &addr->src_addr;
767 ip4->sin_family = listen4->sin_family;
768 ip4->sin_addr.s_addr = dst->ip4.addr;
769 ip4->sin_port = listen4->sin_port;
770
771 ip4 = (struct sockaddr_in *) &addr->dst_addr;
772 ip4->sin_family = listen4->sin_family;
773 ip4->sin_addr.s_addr = src->ip4.addr;
774 ip4->sin_port = port;
775 break;
776 case 6:
777 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
778 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
779 ip6->sin6_family = listen6->sin6_family;
780 ip6->sin6_addr = dst->ip6;
781 ip6->sin6_port = listen6->sin6_port;
782
783 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
784 ip6->sin6_family = listen6->sin6_family;
785 ip6->sin6_addr = src->ip6;
786 ip6->sin6_port = port;
787 break;
788 default:
789 break;
790 }
791}
792
793static inline int cma_user_data_offset(enum rdma_port_space ps)
794{
795 switch (ps) {
796 case RDMA_PS_SDP:
797 return 0;
798 default:
799 return sizeof(struct cma_hdr);
800 }
801}
802
e51060f0
SH		 803static void cma_cancel_route(struct rdma_id_private *id_priv)
804{
3c86aa70
EC		 805 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
806 case IB_LINK_LAYER_INFINIBAND:
e51060f0
SH		 807 if (id_priv->query)
808 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
809 break;
810 default:
811 break;
812 }
813}
814
e51060f0
SH		 815static void cma_cancel_listens(struct rdma_id_private *id_priv)
816{
817 struct rdma_id_private *dev_id_priv;
818
d02d1f53
SH		 819 /*
820 * Remove from listen_any_list to prevent added devices from spawning
821 * additional listen requests.
822 */
e51060f0
SH		 823 mutex_lock(&lock);
824 list_del(&id_priv->list);
825
826 while (!list_empty(&id_priv->listen_list)) {
827 dev_id_priv = list_entry(id_priv->listen_list.next,
828 struct rdma_id_private, listen_list);
d02d1f53
SH		 829 /* sync with device removal to avoid duplicate destruction */
830 list_del_init(&dev_id_priv->list);
831 list_del(&dev_id_priv->listen_list);
832 mutex_unlock(&lock);
833
834 rdma_destroy_id(&dev_id_priv->id);
835 mutex_lock(&lock);
e51060f0
SH		 836 }
837 mutex_unlock(&lock);
838}
839
840static void cma_cancel_operation(struct rdma_id_private *id_priv,
841 enum cma_state state)
842{
843 switch (state) {
844 case CMA_ADDR_QUERY:
845 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
846 break;
847 case CMA_ROUTE_QUERY:
848 cma_cancel_route(id_priv);
849 break;
850 case CMA_LISTEN:
3f446754
RD		 851 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
852 && !id_priv->cma_dev)
e51060f0
SH		 853 cma_cancel_listens(id_priv);
854 break;
855 default:
856 break;
857 }
858}
859
860static void cma_release_port(struct rdma_id_private *id_priv)
861{
862 struct rdma_bind_list *bind_list = id_priv->bind_list;
863
864 if (!bind_list)
865 return;
866
867 mutex_lock(&lock);
868 hlist_del(&id_priv->node);
869 if (hlist_empty(&bind_list->owners)) {
870 idr_remove(bind_list->ps, bind_list->port);
871 kfree(bind_list);
872 }
873 mutex_unlock(&lock);
874}
875
c8f6a362
SH		 876static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
877{
878 struct cma_multicast *mc;
879
880 while (!list_empty(&id_priv->mc_list)) {
881 mc = container_of(id_priv->mc_list.next,
882 struct cma_multicast, list);
883 list_del(&mc->list);
3c86aa70
EC		 884 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
885 case IB_LINK_LAYER_INFINIBAND:
886 ib_sa_free_multicast(mc->multicast.ib);
887 kfree(mc);
888 break;
889 case IB_LINK_LAYER_ETHERNET:
890 kref_put(&mc->mcref, release_mc);
891 break;
892 default:
893 break;
894 }
c8f6a362
SH		 895 }
896}
897
e51060f0
SH		 898void rdma_destroy_id(struct rdma_cm_id *id)
899{
900 struct rdma_id_private *id_priv;
901 enum cma_state state;
902
903 id_priv = container_of(id, struct rdma_id_private, id);
904 state = cma_exch(id_priv, CMA_DESTROYING);
905 cma_cancel_operation(id_priv, state);
906
61a73c70 907 mutex_lock(&lock);
e51060f0 908 if (id_priv->cma_dev) {
61a73c70 909 mutex_unlock(&lock);
3c86aa70 910 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
07ebafba 911 case RDMA_TRANSPORT_IB:
3cd96564 912 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 913 ib_destroy_cm_id(id_priv->cm_id.ib);
914 break;
07ebafba
TT		 915 case RDMA_TRANSPORT_IWARP:
916 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
917 iw_destroy_cm_id(id_priv->cm_id.iw);
918 break;
e51060f0
SH		 919 default:
920 break;
921 }
c8f6a362 922 cma_leave_mc_groups(id_priv);
3cd96564 923 mutex_lock(&lock);
e51060f0 924 cma_detach_from_dev(id_priv);
e51060f0 925 }
61a73c70 926 mutex_unlock(&lock);
e51060f0
SH		 927
928 cma_release_port(id_priv);
929 cma_deref_id(id_priv);
930 wait_for_completion(&id_priv->comp);
931
d02d1f53
SH		 932 if (id_priv->internal_id)
933 cma_deref_id(id_priv->id.context);
934
e51060f0
SH		 935 kfree(id_priv->id.route.path_rec);
936 kfree(id_priv);
937}
938EXPORT_SYMBOL(rdma_destroy_id);
939
940static int cma_rep_recv(struct rdma_id_private *id_priv)
941{
942 int ret;
943
5851bb89 944 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 945 if (ret)
946 goto reject;
947
5851bb89 948 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 949 if (ret)
950 goto reject;
951
952 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
953 if (ret)
954 goto reject;
955
956 return 0;
957reject:
c5483388 958 cma_modify_qp_err(id_priv);
e51060f0
SH		 959 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
960 NULL, 0, NULL, 0);
961 return ret;
962}
963
964static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
965{
966 if (id_priv->id.ps == RDMA_PS_SDP &&
967 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
968 SDP_MAJ_VERSION)
969 return -EINVAL;
970
971 return 0;
972}
973
a1b1b61f
SH		 974static void cma_set_rep_event_data(struct rdma_cm_event *event,
975 struct ib_cm_rep_event_param *rep_data,
976 void *private_data)
977{
978 event->param.conn.private_data = private_data;
979 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
980 event->param.conn.responder_resources = rep_data->responder_resources;
981 event->param.conn.initiator_depth = rep_data->initiator_depth;
982 event->param.conn.flow_control = rep_data->flow_control;
983 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
984 event->param.conn.srq = rep_data->srq;
985 event->param.conn.qp_num = rep_data->remote_qpn;
986}
987
e51060f0
SH		 988static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
989{
990 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 991 struct rdma_cm_event event;
992 int ret = 0;
e51060f0 993
38ca83a5
AV		 994 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
995 cma_disable_callback(id_priv, CMA_CONNECT)) ||
996 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
997 cma_disable_callback(id_priv, CMA_DISCONNECT)))
8aa08602 998 return 0;
e51060f0 999
a1b1b61f 1000 memset(&event, 0, sizeof event);
e51060f0
SH		 1001 switch (ib_event->event) {
1002 case IB_CM_REQ_ERROR:
1003 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1004 event.event = RDMA_CM_EVENT_UNREACHABLE;
1005 event.status = -ETIMEDOUT;
e51060f0
SH		 1006 break;
1007 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 1008 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1009 if (event.status)
1010 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 1011 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 1012 event.status = cma_rep_recv(id_priv);
1013 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1014 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 1015 } else
a1b1b61f
SH		 1016 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1017 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1018 ib_event->private_data);
e51060f0
SH		 1019 break;
1020 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1021 case IB_CM_USER_ESTABLISHED:
1022 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1023 break;
1024 case IB_CM_DREQ_ERROR:
a1b1b61f 1025 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1026 case IB_CM_DREQ_RECEIVED:
1027 case IB_CM_DREP_RECEIVED:
1028 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
1029 goto out;
a1b1b61f 1030 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1031 break;
1032 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1033 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1034 break;
e51060f0
SH		 1035 case IB_CM_MRA_RECEIVED:
1036 /* ignore event */
1037 goto out;
1038 case IB_CM_REJ_RECEIVED:
c5483388 1039 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1040 event.status = ib_event->param.rej_rcvd.reason;
1041 event.event = RDMA_CM_EVENT_REJECTED;
1042 event.param.conn.private_data = ib_event->private_data;
1043 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1044 break;
1045 default:
468f2239 1046 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1047 ib_event->event);
1048 goto out;
1049 }
1050
a1b1b61f 1051 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1052 if (ret) {
1053 /* Destroy the CM ID by returning a non-zero value. */
1054 id_priv->cm_id.ib = NULL;
1055 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1056 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1057 rdma_destroy_id(&id_priv->id);
1058 return ret;
1059 }
1060out:
de910bd9 1061 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1062 return ret;
1063}
1064
628e5f6d
SH		 1065static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1066 struct ib_cm_event *ib_event)
e51060f0
SH		 1067{
1068 struct rdma_id_private *id_priv;
1069 struct rdma_cm_id *id;
1070 struct rdma_route *rt;
1071 union cma_ip_addr *src, *dst;
1b90c137 1072 __be16 port;
e51060f0 1073 u8 ip_ver;
64c5e613 1074 int ret;
e51060f0 1075
3f168d2b
KK		 1076 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1077 &ip_ver, &port, &src, &dst))
1078 goto err;
1079
e51060f0
SH		 1080 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1081 listen_id->ps);
1082 if (IS_ERR(id))
3f168d2b
KK		 1083 goto err;
1084
1085 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1086 ip_ver, port, src, dst);
e51060f0
SH		 1087
1088 rt = &id->route;
1089 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1090 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1091 GFP_KERNEL);
e51060f0 1092 if (!rt->path_rec)
3f168d2b 1093 goto destroy_id;
e51060f0 1094
e51060f0
SH		 1095 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1096 if (rt->num_paths == 2)
1097 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1098
6f8372b6
SH		 1099 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1100 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1101 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1102 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1103 } else {
1104 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1105 &rt->addr.dev_addr);
1106 if (ret)
1107 goto destroy_id;
1108 }
1109 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0
SH		 1110
1111 id_priv = container_of(id, struct rdma_id_private, id);
1112 id_priv->state = CMA_CONNECT;
1113 return id_priv;
3f168d2b
KK		 1114
1115destroy_id:
e51060f0 1116 rdma_destroy_id(id);
3f168d2b 1117err:
e51060f0
SH		 1118 return NULL;
1119}
1120
628e5f6d
SH		 1121static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1122 struct ib_cm_event *ib_event)
1123{
1124 struct rdma_id_private *id_priv;
1125 struct rdma_cm_id *id;
1126 union cma_ip_addr *src, *dst;
1b90c137 1127 __be16 port;
628e5f6d
SH		 1128 u8 ip_ver;
1129 int ret;
1130
1131 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1132 listen_id->ps);
1133 if (IS_ERR(id))
1134 return NULL;
1135
1136
1137 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1138 &ip_ver, &port, &src, &dst))
1139 goto err;
1140
1141 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1142 ip_ver, port, src, dst);
1143
6f8372b6
SH		 1144 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1145 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1146 &id->route.addr.dev_addr);
1147 if (ret)
1148 goto err;
1149 }
628e5f6d
SH		 1150
1151 id_priv = container_of(id, struct rdma_id_private, id);
1152 id_priv->state = CMA_CONNECT;
1153 return id_priv;
1154err:
1155 rdma_destroy_id(id);
1156 return NULL;
1157}
1158
a1b1b61f
SH		 1159static void cma_set_req_event_data(struct rdma_cm_event *event,
1160 struct ib_cm_req_event_param *req_data,
1161 void *private_data, int offset)
1162{
1163 event->param.conn.private_data = private_data + offset;
1164 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1165 event->param.conn.responder_resources = req_data->responder_resources;
1166 event->param.conn.initiator_depth = req_data->initiator_depth;
1167 event->param.conn.flow_control = req_data->flow_control;
1168 event->param.conn.retry_count = req_data->retry_count;
1169 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1170 event->param.conn.srq = req_data->srq;
1171 event->param.conn.qp_num = req_data->remote_qpn;
1172}
1173
e51060f0
SH		 1174static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1175{
1176 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1177 struct rdma_cm_event event;
e51060f0
SH		 1178 int offset, ret;
1179
1180 listen_id = cm_id->context;
de910bd9 1181 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1182 return -ECONNABORTED;
e51060f0 1183
628e5f6d
SH		 1184 memset(&event, 0, sizeof event);
1185 offset = cma_user_data_offset(listen_id->id.ps);
1186 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
c8f6a362 1187 if (cma_is_ud_ps(listen_id->id.ps)) {
628e5f6d
SH		 1188 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1189 event.param.ud.private_data = ib_event->private_data + offset;
1190 event.param.ud.private_data_len =
1191 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1192 } else {
1193 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1194 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1195 ib_event->private_data, offset);
1196 }
e51060f0
SH		 1197 if (!conn_id) {
1198 ret = -ENOMEM;
1199 goto out;
1200 }
1201
de910bd9 1202 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
61a73c70 1203 mutex_lock(&lock);
07ebafba 1204 ret = cma_acquire_dev(conn_id);
61a73c70 1205 mutex_unlock(&lock);
a1a733f6
KK		 1206 if (ret)
1207 goto release_conn_id;
e51060f0
SH		 1208
1209 conn_id->cm_id.ib = cm_id;
1210 cm_id->context = conn_id;
1211 cm_id->cm_handler = cma_ib_handler;
1212
a1b1b61f 1213 ret = conn_id->id.event_handler(&conn_id->id, &event);
45d9478d 1214 if (!ret) {
ead595ae
SH		 1215 /*
1216 * Acquire mutex to prevent user executing rdma_destroy_id()
1217 * while we're accessing the cm_id.
1218 */
1219 mutex_lock(&lock);
1220 if (cma_comp(conn_id, CMA_CONNECT) &&
1221 !cma_is_ud_ps(conn_id->id.ps))
1222 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1223 mutex_unlock(&lock);
de910bd9 1224 mutex_unlock(&conn_id->handler_mutex);
a1a733f6 1225 goto out;
45d9478d 1226 }
a1a733f6
KK		 1227
1228 /* Destroy the CM ID by returning a non-zero value. */
1229 conn_id->cm_id.ib = NULL;
1230
1231release_conn_id:
1232 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1233 mutex_unlock(&conn_id->handler_mutex);
a1a733f6
KK		 1234 rdma_destroy_id(&conn_id->id);
1235
e51060f0 1236out:
de910bd9 1237 mutex_unlock(&listen_id->handler_mutex);
e51060f0
SH		 1238 return ret;
1239}
1240
1241static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1242{
628e5f6d 1243 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1244}
1245
1246static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1247 struct ib_cm_compare_data *compare)
1248{
1249 struct cma_hdr *cma_data, *cma_mask;
1250 struct sdp_hh *sdp_data, *sdp_mask;
1b90c137 1251 __be32 ip4_addr;
e51060f0
SH		 1252 struct in6_addr ip6_addr;
1253
1254 memset(compare, 0, sizeof *compare);
1255 cma_data = (void *) compare->data;
1256 cma_mask = (void *) compare->mask;
1257 sdp_data = (void *) compare->data;
1258 sdp_mask = (void *) compare->mask;
1259
1260 switch (addr->sa_family) {
1261 case AF_INET:
1262 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1263 if (ps == RDMA_PS_SDP) {
1264 sdp_set_ip_ver(sdp_data, 4);
1265 sdp_set_ip_ver(sdp_mask, 0xF);
1266 sdp_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1267 sdp_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1268 } else {
1269 cma_set_ip_ver(cma_data, 4);
1270 cma_set_ip_ver(cma_mask, 0xF);
1271 cma_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1272 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1273 }
1274 break;
1275 case AF_INET6:
1276 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1277 if (ps == RDMA_PS_SDP) {
1278 sdp_set_ip_ver(sdp_data, 6);
1279 sdp_set_ip_ver(sdp_mask, 0xF);
1280 sdp_data->dst_addr.ip6 = ip6_addr;
1281 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1282 sizeof sdp_mask->dst_addr.ip6);
1283 } else {
1284 cma_set_ip_ver(cma_data, 6);
1285 cma_set_ip_ver(cma_mask, 0xF);
1286 cma_data->dst_addr.ip6 = ip6_addr;
1287 memset(&cma_mask->dst_addr.ip6, 0xFF,
1288 sizeof cma_mask->dst_addr.ip6);
1289 }
1290 break;
1291 default:
1292 break;
1293 }
1294}
1295
07ebafba
TT		 1296static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1297{
1298 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1299 struct rdma_cm_event event;
07ebafba
TT		 1300 struct sockaddr_in *sin;
1301 int ret = 0;
1302
de910bd9 1303 if (cma_disable_callback(id_priv, CMA_CONNECT))
be65f086 1304 return 0;
07ebafba 1305
be65f086 1306 memset(&event, 0, sizeof event);
07ebafba
TT		 1307 switch (iw_event->event) {
1308 case IW_CM_EVENT_CLOSE:
a1b1b61f 1309 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1310 break;
1311 case IW_CM_EVENT_CONNECT_REPLY:
1312 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1313 *sin = iw_event->local_addr;
1314 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1315 *sin = iw_event->remote_addr;
881a045f
SW		 1316 switch (iw_event->status) {
1317 case 0:
a1b1b61f 1318 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1319 break;
1320 case -ECONNRESET:
1321 case -ECONNREFUSED:
1322 event.event = RDMA_CM_EVENT_REJECTED;
1323 break;
1324 case -ETIMEDOUT:
1325 event.event = RDMA_CM_EVENT_UNREACHABLE;
1326 break;
1327 default:
1328 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1329 break;
1330 }
07ebafba
TT		 1331 break;
1332 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1333 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1334 break;
1335 default:
1336 BUG_ON(1);
1337 }
1338
a1b1b61f
SH		 1339 event.status = iw_event->status;
1340 event.param.conn.private_data = iw_event->private_data;
1341 event.param.conn.private_data_len = iw_event->private_data_len;
1342 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1343 if (ret) {
1344 /* Destroy the CM ID by returning a non-zero value. */
1345 id_priv->cm_id.iw = NULL;
1346 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1347 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1348 rdma_destroy_id(&id_priv->id);
1349 return ret;
1350 }
1351
de910bd9 1352 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1353 return ret;
1354}
1355
1356static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1357 struct iw_cm_event *iw_event)
1358{
1359 struct rdma_cm_id *new_cm_id;
1360 struct rdma_id_private *listen_id, *conn_id;
1361 struct sockaddr_in *sin;
1362 struct net_device *dev = NULL;
a1b1b61f 1363 struct rdma_cm_event event;
07ebafba 1364 int ret;
8d8293cf 1365 struct ib_device_attr attr;
07ebafba
TT		 1366
1367 listen_id = cm_id->context;
de910bd9 1368 if (cma_disable_callback(listen_id, CMA_LISTEN))
8aa08602 1369 return -ECONNABORTED;
07ebafba
TT		 1370
1371 /* Create a new RDMA id for the new IW CM ID */
1372 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1373 listen_id->id.context,
1374 RDMA_PS_TCP);
10f32065 1375 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1376 ret = -ENOMEM;
1377 goto out;
1378 }
1379 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1380 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba
TT		 1381 conn_id->state = CMA_CONNECT;
1382
1ab35276 1383 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
07ebafba
TT		 1384 if (!dev) {
1385 ret = -EADDRNOTAVAIL;
de910bd9 1386 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1387 rdma_destroy_id(new_cm_id);
1388 goto out;
1389 }
1390 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1391 if (ret) {
de910bd9 1392 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1393 rdma_destroy_id(new_cm_id);
1394 goto out;
1395 }
1396
61a73c70 1397 mutex_lock(&lock);
07ebafba 1398 ret = cma_acquire_dev(conn_id);
61a73c70 1399 mutex_unlock(&lock);
07ebafba 1400 if (ret) {
de910bd9 1401 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1402 rdma_destroy_id(new_cm_id);
1403 goto out;
1404 }
1405
1406 conn_id->cm_id.iw = cm_id;
1407 cm_id->context = conn_id;
1408 cm_id->cm_handler = cma_iw_handler;
1409
1410 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1411 *sin = iw_event->local_addr;
1412 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1413 *sin = iw_event->remote_addr;
1414
8d8293cf
SW		 1415 ret = ib_query_device(conn_id->id.device, &attr);
1416 if (ret) {
de910bd9 1417 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1418 rdma_destroy_id(new_cm_id);
1419 goto out;
1420 }
1421
a1b1b61f
SH		 1422 memset(&event, 0, sizeof event);
1423 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1424 event.param.conn.private_data = iw_event->private_data;
1425 event.param.conn.private_data_len = iw_event->private_data_len;
8d8293cf
SW		 1426 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1427 event.param.conn.responder_resources = attr.max_qp_rd_atom;
a1b1b61f 1428 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1429 if (ret) {
1430 /* User wants to destroy the CM ID */
1431 conn_id->cm_id.iw = NULL;
1432 cma_exch(conn_id, CMA_DESTROYING);
de910bd9 1433 mutex_unlock(&conn_id->handler_mutex);
07ebafba 1434 rdma_destroy_id(&conn_id->id);
de910bd9 1435 goto out;
07ebafba
TT		 1436 }
1437
de910bd9
OG		 1438 mutex_unlock(&conn_id->handler_mutex);
1439
07ebafba
TT		 1440out:
1441 if (dev)
1442 dev_put(dev);
de910bd9 1443 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1444 return ret;
1445}
1446
e51060f0
SH		 1447static int cma_ib_listen(struct rdma_id_private *id_priv)
1448{
1449 struct ib_cm_compare_data compare_data;
1450 struct sockaddr *addr;
1451 __be64 svc_id;
1452 int ret;
1453
1454 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1455 id_priv);
1456 if (IS_ERR(id_priv->cm_id.ib))
1457 return PTR_ERR(id_priv->cm_id.ib);
1458
3f446754 1459 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
e51060f0
SH		 1460 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1461 if (cma_any_addr(addr))
1462 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1463 else {
1464 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1465 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1466 }
1467
1468 if (ret) {
1469 ib_destroy_cm_id(id_priv->cm_id.ib);
1470 id_priv->cm_id.ib = NULL;
1471 }
1472
1473 return ret;
1474}
1475
07ebafba
TT		 1476static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1477{
1478 int ret;
1479 struct sockaddr_in *sin;
1480
1481 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1482 iw_conn_req_handler,
1483 id_priv);
1484 if (IS_ERR(id_priv->cm_id.iw))
1485 return PTR_ERR(id_priv->cm_id.iw);
1486
1487 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1488 id_priv->cm_id.iw->local_addr = *sin;
1489
1490 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1491
1492 if (ret) {
1493 iw_destroy_cm_id(id_priv->cm_id.iw);
1494 id_priv->cm_id.iw = NULL;
1495 }
1496
1497 return ret;
1498}
1499
e51060f0
SH		 1500static int cma_listen_handler(struct rdma_cm_id *id,
1501 struct rdma_cm_event *event)
1502{
1503 struct rdma_id_private *id_priv = id->context;
1504
1505 id->context = id_priv->id.context;
1506 id->event_handler = id_priv->id.event_handler;
1507 return id_priv->id.event_handler(id, event);
1508}
1509
1510static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1511 struct cma_device *cma_dev)
1512{
1513 struct rdma_id_private *dev_id_priv;
1514 struct rdma_cm_id *id;
1515 int ret;
1516
1517 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1518 if (IS_ERR(id))
1519 return;
1520
1521 dev_id_priv = container_of(id, struct rdma_id_private, id);
1522
1523 dev_id_priv->state = CMA_ADDR_BOUND;
1524 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
3f446754 1525 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
e51060f0
SH		 1526
1527 cma_attach_to_dev(dev_id_priv, cma_dev);
1528 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1529 atomic_inc(&id_priv->refcount);
1530 dev_id_priv->internal_id = 1;
e51060f0
SH		 1531
1532 ret = rdma_listen(id, id_priv->backlog);
1533 if (ret)
d02d1f53 1534 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1535 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1536}
1537
1538static void cma_listen_on_all(struct rdma_id_private *id_priv)
1539{
1540 struct cma_device *cma_dev;
1541
1542 mutex_lock(&lock);
1543 list_add_tail(&id_priv->list, &listen_any_list);
1544 list_for_each_entry(cma_dev, &dev_list, list)
1545 cma_listen_on_dev(id_priv, cma_dev);
1546 mutex_unlock(&lock);
1547}
1548
e51060f0
SH		 1549int rdma_listen(struct rdma_cm_id *id, int backlog)
1550{
1551 struct rdma_id_private *id_priv;
1552 int ret;
1553
1554 id_priv = container_of(id, struct rdma_id_private, id);
1555 if (id_priv->state == CMA_IDLE) {
d14714df
SH		 1556 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
1557 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
e51060f0
SH		 1558 if (ret)
1559 return ret;
1560 }
1561
1562 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1563 return -EINVAL;
1564
1565 id_priv->backlog = backlog;
1566 if (id->device) {
07ebafba
TT		 1567 switch (rdma_node_get_transport(id->device->node_type)) {
1568 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1569 ret = cma_ib_listen(id_priv);
1570 if (ret)
1571 goto err;
1572 break;
07ebafba
TT		 1573 case RDMA_TRANSPORT_IWARP:
1574 ret = cma_iw_listen(id_priv, backlog);
1575 if (ret)
1576 goto err;
1577 break;
e51060f0
SH		 1578 default:
1579 ret = -ENOSYS;
1580 goto err;
1581 }
1582 } else
1583 cma_listen_on_all(id_priv);
1584
1585 return 0;
1586err:
1587 id_priv->backlog = 0;
1588 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1589 return ret;
1590}
1591EXPORT_SYMBOL(rdma_listen);
1592
a81c994d
SH		 1593void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1594{
1595 struct rdma_id_private *id_priv;
1596
1597 id_priv = container_of(id, struct rdma_id_private, id);
1598 id_priv->tos = (u8) tos;
1599}
1600EXPORT_SYMBOL(rdma_set_service_type);
1601
e51060f0
SH		 1602static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1603 void *context)
1604{
1605 struct cma_work *work = context;
1606 struct rdma_route *route;
1607
1608 route = &work->id->id.route;
1609
1610 if (!status) {
1611 route->num_paths = 1;
1612 *route->path_rec = *path_rec;
1613 } else {
1614 work->old_state = CMA_ROUTE_QUERY;
1615 work->new_state = CMA_ADDR_RESOLVED;
1616 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1617 work->event.status = status;
e51060f0
SH		 1618 }
1619
1620 queue_work(cma_wq, &work->work);
1621}
1622
1623static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1624 struct cma_work *work)
1625{
a81c994d 1626 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1627 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1628 ib_sa_comp_mask comp_mask;
1629 struct sockaddr_in6 *sin6;
e51060f0
SH		 1630
1631 memset(&path_rec, 0, sizeof path_rec);
6f8372b6
SH		 1632 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1633 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
a81c994d 1634 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1635 path_rec.numb_path = 1;
962063e6 1636 path_rec.reversible = 1;
3f446754
RD		 1637 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1638 (struct sockaddr *) &addr->dst_addr);
a81c994d
SH		 1639
1640 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1641 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1642 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1643
3f446754 1644 if (addr->src_addr.ss_family == AF_INET) {
a81c994d
SH		 1645 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1646 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1647 } else {
1648 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1649 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1650 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1651 }
e51060f0 1652
c1a0b23b 1653 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1654 id_priv->id.port_num, &path_rec,
1655 comp_mask, timeout_ms,
1656 GFP_KERNEL, cma_query_handler,
1657 work, &id_priv->query);
e51060f0
SH		 1658
1659 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1660}
1661
c4028958 1662static void cma_work_handler(struct work_struct *_work)
e51060f0 1663{
c4028958 1664 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1665 struct rdma_id_private *id_priv = work->id;
1666 int destroy = 0;
1667
de910bd9 1668 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1669 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1670 goto out;
1671
1672 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1673 cma_exch(id_priv, CMA_DESTROYING);
1674 destroy = 1;
1675 }
1676out:
de910bd9 1677 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1678 cma_deref_id(id_priv);
1679 if (destroy)
1680 rdma_destroy_id(&id_priv->id);
1681 kfree(work);
1682}
1683
dd5bdff8
OG		 1684static void cma_ndev_work_handler(struct work_struct *_work)
1685{
1686 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1687 struct rdma_id_private *id_priv = work->id;
1688 int destroy = 0;
1689
1690 mutex_lock(&id_priv->handler_mutex);
1691 if (id_priv->state == CMA_DESTROYING ||
1692 id_priv->state == CMA_DEVICE_REMOVAL)
1693 goto out;
1694
1695 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1696 cma_exch(id_priv, CMA_DESTROYING);
1697 destroy = 1;
1698 }
1699
1700out:
1701 mutex_unlock(&id_priv->handler_mutex);
1702 cma_deref_id(id_priv);
1703 if (destroy)
1704 rdma_destroy_id(&id_priv->id);
1705 kfree(work);
1706}
1707
e51060f0
SH		 1708static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1709{
1710 struct rdma_route *route = &id_priv->id.route;
1711 struct cma_work *work;
1712 int ret;
1713
1714 work = kzalloc(sizeof *work, GFP_KERNEL);
1715 if (!work)
1716 return -ENOMEM;
1717
1718 work->id = id_priv;
c4028958 1719 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1720 work->old_state = CMA_ROUTE_QUERY;
1721 work->new_state = CMA_ROUTE_RESOLVED;
1722 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1723
1724 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1725 if (!route->path_rec) {
1726 ret = -ENOMEM;
1727 goto err1;
1728 }
1729
1730 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1731 if (ret)
1732 goto err2;
1733
1734 return 0;
1735err2:
1736 kfree(route->path_rec);
1737 route->path_rec = NULL;
1738err1:
1739 kfree(work);
1740 return ret;
1741}
1742
1743int rdma_set_ib_paths(struct rdma_cm_id *id,
1744 struct ib_sa_path_rec *path_rec, int num_paths)
1745{
1746 struct rdma_id_private *id_priv;
1747 int ret;
1748
1749 id_priv = container_of(id, struct rdma_id_private, id);
1750 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1751 return -EINVAL;
1752
9893e742
JL		 1753 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1754 GFP_KERNEL);
e51060f0
SH		 1755 if (!id->route.path_rec) {
1756 ret = -ENOMEM;
1757 goto err;
1758 }
1759
ae2d9293 1760 id->route.num_paths = num_paths;
e51060f0
SH		 1761 return 0;
1762err:
1763 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1764 return ret;
1765}
1766EXPORT_SYMBOL(rdma_set_ib_paths);
1767
07ebafba
TT		 1768static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1769{
1770 struct cma_work *work;
1771
1772 work = kzalloc(sizeof *work, GFP_KERNEL);
1773 if (!work)
1774 return -ENOMEM;
1775
1776 work->id = id_priv;
c4028958 1777 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1778 work->old_state = CMA_ROUTE_QUERY;
1779 work->new_state = CMA_ROUTE_RESOLVED;
1780 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1781 queue_work(cma_wq, &work->work);
1782 return 0;
1783}
1784
3c86aa70
EC		 1785static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1786{
1787 struct rdma_route *route = &id_priv->id.route;
1788 struct rdma_addr *addr = &route->addr;
1789 struct cma_work *work;
1790 int ret;
1791 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1792 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1793 struct net_device *ndev = NULL;
1794
1795 if (src_addr->sin_family != dst_addr->sin_family)
1796 return -EINVAL;
1797
1798 work = kzalloc(sizeof *work, GFP_KERNEL);
1799 if (!work)
1800 return -ENOMEM;
1801
1802 work->id = id_priv;
1803 INIT_WORK(&work->work, cma_work_handler);
1804
1805 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1806 if (!route->path_rec) {
1807 ret = -ENOMEM;
1808 goto err1;
1809 }
1810
1811 route->num_paths = 1;
1812
1813 iboe_mac_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr);
1814 iboe_mac_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr);
1815
1816 route->path_rec->hop_limit = 1;
1817 route->path_rec->reversible = 1;
1818 route->path_rec->pkey = cpu_to_be16(0xffff);
1819 route->path_rec->mtu_selector = IB_SA_EQ;
1820
1821 if (addr->dev_addr.bound_dev_if)
1822 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1823 if (!ndev) {
1824 ret = -ENODEV;
1825 goto err2;
1826 }
1827
1828 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1829 route->path_rec->rate_selector = IB_SA_EQ;
1830 route->path_rec->rate = iboe_get_rate(ndev);
1831 dev_put(ndev);
1832 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1833 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1834 if (!route->path_rec->mtu) {
1835 ret = -EINVAL;
1836 goto err2;
1837 }
1838
1839 work->old_state = CMA_ROUTE_QUERY;
1840 work->new_state = CMA_ROUTE_RESOLVED;
1841 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1842 work->event.status = 0;
1843
1844 queue_work(cma_wq, &work->work);
1845
1846 return 0;
1847
1848err2:
1849 kfree(route->path_rec);
1850 route->path_rec = NULL;
1851err1:
1852 kfree(work);
1853 return ret;
1854}
1855
e51060f0
SH		 1856int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1857{
1858 struct rdma_id_private *id_priv;
1859 int ret;
1860
1861 id_priv = container_of(id, struct rdma_id_private, id);
1862 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1863 return -EINVAL;
1864
1865 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1866 switch (rdma_node_get_transport(id->device->node_type)) {
1867 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 1868 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1869 case IB_LINK_LAYER_INFINIBAND:
1870 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1871 break;
1872 case IB_LINK_LAYER_ETHERNET:
1873 ret = cma_resolve_iboe_route(id_priv);
1874 break;
1875 default:
1876 ret = -ENOSYS;
1877 }
e51060f0 1878 break;
07ebafba
TT		 1879 case RDMA_TRANSPORT_IWARP:
1880 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1881 break;
e51060f0
SH		 1882 default:
1883 ret = -ENOSYS;
1884 break;
1885 }
1886 if (ret)
1887 goto err;
1888
1889 return 0;
1890err:
1891 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1892 cma_deref_id(id_priv);
1893 return ret;
1894}
1895EXPORT_SYMBOL(rdma_resolve_route);
1896
1897static int cma_bind_loopback(struct rdma_id_private *id_priv)
1898{
1899 struct cma_device *cma_dev;
1900 struct ib_port_attr port_attr;
f0ee3404 1901 union ib_gid gid;
e51060f0
SH		 1902 u16 pkey;
1903 int ret;
1904 u8 p;
1905
1906 mutex_lock(&lock);
e82153b5
KK		 1907 if (list_empty(&dev_list)) {
1908 ret = -ENODEV;
1909 goto out;
1910 }
e51060f0
SH		 1911 list_for_each_entry(cma_dev, &dev_list, list)
1912 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1913 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1914 port_attr.state == IB_PORT_ACTIVE)
1915 goto port_found;
1916
e82153b5
KK		 1917 p = 1;
1918 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1919
1920port_found:
f0ee3404 1921 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1922 if (ret)
1923 goto out;
1924
1925 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1926 if (ret)
1927 goto out;
1928
6f8372b6 1929 id_priv->id.route.addr.dev_addr.dev_type =
3c86aa70 1930 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
6f8372b6
SH		 1931 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1932
1933 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1934 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1935 id_priv->id.port_num = p;
1936 cma_attach_to_dev(id_priv, cma_dev);
1937out:
1938 mutex_unlock(&lock);
1939 return ret;
1940}
1941
1942static void addr_handler(int status, struct sockaddr *src_addr,
1943 struct rdma_dev_addr *dev_addr, void *context)
1944{
1945 struct rdma_id_private *id_priv = context;
a1b1b61f 1946 struct rdma_cm_event event;
e51060f0 1947
a1b1b61f 1948 memset(&event, 0, sizeof event);
de910bd9 1949 mutex_lock(&id_priv->handler_mutex);
61a73c70
SH		 1950
1951 /*
1952 * Grab mutex to block rdma_destroy_id() from removing the device while
1953 * we're trying to acquire it.
1954 */
1955 mutex_lock(&lock);
1956 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1957 mutex_unlock(&lock);
1958 goto out;
1959 }
1960
1961 if (!status && !id_priv->cma_dev)
e51060f0 1962 status = cma_acquire_dev(id_priv);
61a73c70 1963 mutex_unlock(&lock);
e51060f0
SH		 1964
1965 if (status) {
61a73c70 1966 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1967 goto out;
a1b1b61f
SH		 1968 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1969 event.status = status;
e51060f0 1970 } else {
e51060f0
SH		 1971 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1972 ip_addr_size(src_addr));
a1b1b61f 1973 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1974 }
1975
a1b1b61f 1976 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1977 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 1978 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1979 cma_deref_id(id_priv);
1980 rdma_destroy_id(&id_priv->id);
1981 return;
1982 }
1983out:
de910bd9 1984 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1985 cma_deref_id(id_priv);
1986}
1987
1988static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1989{
1990 struct cma_work *work;
6f8372b6 1991 struct sockaddr *src, *dst;
f0ee3404 1992 union ib_gid gid;
e51060f0
SH		 1993 int ret;
1994
1995 work = kzalloc(sizeof *work, GFP_KERNEL);
1996 if (!work)
1997 return -ENOMEM;
1998
1999 if (!id_priv->cma_dev) {
2000 ret = cma_bind_loopback(id_priv);
2001 if (ret)
2002 goto err;
2003 }
2004
6f8372b6
SH		 2005 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2006 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2007
6f8372b6
SH		 2008 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2009 if (cma_zero_addr(src)) {
2010 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2011 if ((src->sa_family = dst->sa_family) == AF_INET) {
2012 ((struct sockaddr_in *) src)->sin_addr.s_addr =
2013 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2014 } else {
2015 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
2016 &((struct sockaddr_in6 *) dst)->sin6_addr);
2017 }
e51060f0
SH		 2018 }
2019
2020 work->id = id_priv;
c4028958 2021 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 2022 work->old_state = CMA_ADDR_QUERY;
2023 work->new_state = CMA_ADDR_RESOLVED;
2024 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2025 queue_work(cma_wq, &work->work);
2026 return 0;
2027err:
2028 kfree(work);
2029 return ret;
2030}
2031
2032static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2033 struct sockaddr *dst_addr)
2034{
d14714df
SH		 2035 if (!src_addr || !src_addr->sa_family) {
2036 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2037 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2038 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2039 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2040 }
2041 }
2042 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2043}
2044
2045int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2046 struct sockaddr *dst_addr, int timeout_ms)
2047{
2048 struct rdma_id_private *id_priv;
2049 int ret;
2050
2051 id_priv = container_of(id, struct rdma_id_private, id);
2052 if (id_priv->state == CMA_IDLE) {
2053 ret = cma_bind_addr(id, src_addr, dst_addr);
2054 if (ret)
2055 return ret;
2056 }
2057
2058 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
2059 return -EINVAL;
2060
2061 atomic_inc(&id_priv->refcount);
2062 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2063 if (cma_any_addr(dst_addr))
2064 ret = cma_resolve_loopback(id_priv);
2065 else
3f446754 2066 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 2067 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 2068 timeout_ms, addr_handler, id_priv);
2069 if (ret)
2070 goto err;
2071
2072 return 0;
2073err:
2074 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
2075 cma_deref_id(id_priv);
2076 return ret;
2077}
2078EXPORT_SYMBOL(rdma_resolve_addr);
2079
2080static void cma_bind_port(struct rdma_bind_list *bind_list,
2081 struct rdma_id_private *id_priv)
2082{
2083 struct sockaddr_in *sin;
2084
2085 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2086 sin->sin_port = htons(bind_list->port);
2087 id_priv->bind_list = bind_list;
2088 hlist_add_head(&id_priv->node, &bind_list->owners);
2089}
2090
2091static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2092 unsigned short snum)
2093{
2094 struct rdma_bind_list *bind_list;
aedec080 2095 int port, ret;
e51060f0 2096
cb164b8c 2097 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2098 if (!bind_list)
2099 return -ENOMEM;
2100
aedec080
SH		 2101 do {
2102 ret = idr_get_new_above(ps, bind_list, snum, &port);
2103 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2104
2105 if (ret)
2106 goto err1;
2107
2108 if (port != snum) {
2109 ret = -EADDRNOTAVAIL;
2110 goto err2;
2111 }
2112
2113 bind_list->ps = ps;
2114 bind_list->port = (unsigned short) port;
2115 cma_bind_port(bind_list, id_priv);
2116 return 0;
2117err2:
2118 idr_remove(ps, port);
2119err1:
2120 kfree(bind_list);
2121 return ret;
2122}
e51060f0 2123
aedec080
SH		 2124static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2125{
5d7220e8
TH		 2126 static unsigned int last_used_port;
2127 int low, high, remaining;
2128 unsigned int rover;
e51060f0 2129
227b60f5 2130 inet_get_local_port_range(&low, &high);
5d7220e8
TH		 2131 remaining = (high - low) + 1;
2132 rover = net_random() % remaining + low;
2133retry:
2134 if (last_used_port != rover &&
2135 !idr_find(ps, (unsigned short) rover)) {
2136 int ret = cma_alloc_port(ps, id_priv, rover);
2137 /*
2138 * Remember previously used port number in order to avoid
2139 * re-using same port immediately after it is closed.
2140 */
2141 if (!ret)
2142 last_used_port = rover;
2143 if (ret != -EADDRNOTAVAIL)
2144 return ret;
e51060f0 2145 }
5d7220e8
TH		 2146 if (--remaining) {
2147 rover++;
2148 if ((rover < low) || (rover > high))
2149 rover = low;
2150 goto retry;
2151 }
2152 return -EADDRNOTAVAIL;
e51060f0
SH		 2153}
2154
2155static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2156{
2157 struct rdma_id_private *cur_id;
2158 struct sockaddr_in *sin, *cur_sin;
2159 struct rdma_bind_list *bind_list;
2160 struct hlist_node *node;
2161 unsigned short snum;
2162
2163 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2164 snum = ntohs(sin->sin_port);
2165 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2166 return -EACCES;
2167
2168 bind_list = idr_find(ps, snum);
2169 if (!bind_list)
2170 return cma_alloc_port(ps, id_priv, snum);
2171
2172 /*
2173 * We don't support binding to any address if anyone is bound to
2174 * a specific address on the same port.
2175 */
3f446754 2176 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr))
e51060f0
SH		 2177 return -EADDRNOTAVAIL;
2178
2179 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
3f446754 2180 if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr))
e51060f0 2181 return -EADDRNOTAVAIL;
3cd96564 2182
e51060f0
SH		 2183 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
2184 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2185 return -EADDRINUSE;
2186 }
2187
2188 cma_bind_port(bind_list, id_priv);
2189 return 0;
2190}
2191
2192static int cma_get_port(struct rdma_id_private *id_priv)
2193{
2194 struct idr *ps;
2195 int ret;
2196
2197 switch (id_priv->id.ps) {
2198 case RDMA_PS_SDP:
2199 ps = &sdp_ps;
2200 break;
2201 case RDMA_PS_TCP:
2202 ps = &tcp_ps;
2203 break;
628e5f6d
SH		 2204 case RDMA_PS_UDP:
2205 ps = &udp_ps;
2206 break;
c8f6a362
SH		 2207 case RDMA_PS_IPOIB:
2208 ps = &ipoib_ps;
2209 break;
e51060f0
SH		 2210 default:
2211 return -EPROTONOSUPPORT;
2212 }
2213
2214 mutex_lock(&lock);
3f446754 2215 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2216 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2217 else
2218 ret = cma_use_port(ps, id_priv);
2219 mutex_unlock(&lock);
2220
2221 return ret;
2222}
2223
d14714df
SH		 2224static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2225 struct sockaddr *addr)
2226{
fd4582a3 2227#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
d14714df
SH		 2228 struct sockaddr_in6 *sin6;
2229
2230 if (addr->sa_family != AF_INET6)
2231 return 0;
2232
2233 sin6 = (struct sockaddr_in6 *) addr;
2234 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2235 !sin6->sin6_scope_id)
2236 return -EINVAL;
2237
2238 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2239#endif
2240 return 0;
2241}
2242
e51060f0
SH		 2243int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2244{
2245 struct rdma_id_private *id_priv;
2246 int ret;
2247
1f5175ad 2248 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
e51060f0
SH		 2249 return -EAFNOSUPPORT;
2250
2251 id_priv = container_of(id, struct rdma_id_private, id);
2252 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2253 return -EINVAL;
2254
d14714df
SH		 2255 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2256 if (ret)
2257 goto err1;
2258
8523c048 2259 if (!cma_any_addr(addr)) {
e51060f0 2260 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2261 if (ret)
255d0c14
KK		 2262 goto err1;
2263
2264 mutex_lock(&lock);
2265 ret = cma_acquire_dev(id_priv);
2266 mutex_unlock(&lock);
2267 if (ret)
2268 goto err1;
e51060f0
SH		 2269 }
2270
2271 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2272 ret = cma_get_port(id_priv);
2273 if (ret)
255d0c14 2274 goto err2;
e51060f0
SH		 2275
2276 return 0;
255d0c14 2277err2:
6f8372b6 2278 if (id_priv->cma_dev) {
255d0c14
KK		 2279 mutex_lock(&lock);
2280 cma_detach_from_dev(id_priv);
2281 mutex_unlock(&lock);
2282 }
2283err1:
e51060f0
SH		 2284 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2285 return ret;
2286}
2287EXPORT_SYMBOL(rdma_bind_addr);
2288
2289static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2290 struct rdma_route *route)
2291{
e51060f0
SH		 2292 struct cma_hdr *cma_hdr;
2293 struct sdp_hh *sdp_hdr;
2294
1f5175ad
AS		 2295 if (route->addr.src_addr.ss_family == AF_INET) {
2296 struct sockaddr_in *src4, *dst4;
2297
2298 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2299 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2300
2301 switch (ps) {
2302 case RDMA_PS_SDP:
2303 sdp_hdr = hdr;
2304 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2305 return -EINVAL;
2306 sdp_set_ip_ver(sdp_hdr, 4);
2307 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2308 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2309 sdp_hdr->port = src4->sin_port;
2310 break;
2311 default:
2312 cma_hdr = hdr;
2313 cma_hdr->cma_version = CMA_VERSION;
2314 cma_set_ip_ver(cma_hdr, 4);
2315 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2316 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2317 cma_hdr->port = src4->sin_port;
2318 break;
2319 }
2320 } else {
2321 struct sockaddr_in6 *src6, *dst6;
2322
2323 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2324 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2325
2326 switch (ps) {
2327 case RDMA_PS_SDP:
2328 sdp_hdr = hdr;
2329 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2330 return -EINVAL;
2331 sdp_set_ip_ver(sdp_hdr, 6);
2332 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2333 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2334 sdp_hdr->port = src6->sin6_port;
2335 break;
2336 default:
2337 cma_hdr = hdr;
2338 cma_hdr->cma_version = CMA_VERSION;
2339 cma_set_ip_ver(cma_hdr, 6);
2340 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2341 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2342 cma_hdr->port = src6->sin6_port;
2343 break;
2344 }
e51060f0
SH		 2345 }
2346 return 0;
2347}
2348
628e5f6d
SH		 2349static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2350 struct ib_cm_event *ib_event)
2351{
2352 struct rdma_id_private *id_priv = cm_id->context;
2353 struct rdma_cm_event event;
2354 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2355 int ret = 0;
2356
de910bd9 2357 if (cma_disable_callback(id_priv, CMA_CONNECT))
8aa08602 2358 return 0;
628e5f6d 2359
8aa08602 2360 memset(&event, 0, sizeof event);
628e5f6d
SH		 2361 switch (ib_event->event) {
2362 case IB_CM_SIDR_REQ_ERROR:
2363 event.event = RDMA_CM_EVENT_UNREACHABLE;
2364 event.status = -ETIMEDOUT;
2365 break;
2366 case IB_CM_SIDR_REP_RECEIVED:
2367 event.param.ud.private_data = ib_event->private_data;
2368 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2369 if (rep->status != IB_SIDR_SUCCESS) {
2370 event.event = RDMA_CM_EVENT_UNREACHABLE;
2371 event.status = ib_event->param.sidr_rep_rcvd.status;
2372 break;
2373 }
d2ca39f2
YE		 2374 ret = cma_set_qkey(id_priv);
2375 if (ret) {
2376 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2377 event.status = -EINVAL;
2378 break;
2379 }
c8f6a362 2380 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2381 event.event = RDMA_CM_EVENT_UNREACHABLE;
2382 event.status = -EINVAL;
2383 break;
2384 }
2385 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2386 id_priv->id.route.path_rec,
2387 &event.param.ud.ah_attr);
2388 event.param.ud.qp_num = rep->qpn;
2389 event.param.ud.qkey = rep->qkey;
2390 event.event = RDMA_CM_EVENT_ESTABLISHED;
2391 event.status = 0;
2392 break;
2393 default:
468f2239 2394 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2395 ib_event->event);
2396 goto out;
2397 }
2398
2399 ret = id_priv->id.event_handler(&id_priv->id, &event);
2400 if (ret) {
2401 /* Destroy the CM ID by returning a non-zero value. */
2402 id_priv->cm_id.ib = NULL;
2403 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2404 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2405 rdma_destroy_id(&id_priv->id);
2406 return ret;
2407 }
2408out:
de910bd9 2409 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2410 return ret;
2411}
2412
2413static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2414 struct rdma_conn_param *conn_param)
2415{
2416 struct ib_cm_sidr_req_param req;
2417 struct rdma_route *route;
2418 int ret;
2419
2420 req.private_data_len = sizeof(struct cma_hdr) +
2421 conn_param->private_data_len;
2422 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2423 if (!req.private_data)
2424 return -ENOMEM;
2425
2426 if (conn_param->private_data && conn_param->private_data_len)
2427 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2428 conn_param->private_data, conn_param->private_data_len);
2429
2430 route = &id_priv->id.route;
2431 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2432 if (ret)
2433 goto out;
2434
2435 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2436 cma_sidr_rep_handler, id_priv);
2437 if (IS_ERR(id_priv->cm_id.ib)) {
2438 ret = PTR_ERR(id_priv->cm_id.ib);
2439 goto out;
2440 }
2441
2442 req.path = route->path_rec;
2443 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2444 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2445 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2446 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2447
2448 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2449 if (ret) {
2450 ib_destroy_cm_id(id_priv->cm_id.ib);
2451 id_priv->cm_id.ib = NULL;
2452 }
2453out:
2454 kfree(req.private_data);
2455 return ret;
2456}
2457
e51060f0
SH		 2458static int cma_connect_ib(struct rdma_id_private *id_priv,
2459 struct rdma_conn_param *conn_param)
2460{
2461 struct ib_cm_req_param req;
2462 struct rdma_route *route;
2463 void *private_data;
2464 int offset, ret;
2465
2466 memset(&req, 0, sizeof req);
2467 offset = cma_user_data_offset(id_priv->id.ps);
2468 req.private_data_len = offset + conn_param->private_data_len;
2469 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2470 if (!private_data)
2471 return -ENOMEM;
2472
2473 if (conn_param->private_data && conn_param->private_data_len)
2474 memcpy(private_data + offset, conn_param->private_data,
2475 conn_param->private_data_len);
2476
2477 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2478 id_priv);
2479 if (IS_ERR(id_priv->cm_id.ib)) {
2480 ret = PTR_ERR(id_priv->cm_id.ib);
2481 goto out;
2482 }
2483
2484 route = &id_priv->id.route;
2485 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2486 if (ret)
2487 goto out;
2488 req.private_data = private_data;
2489
2490 req.primary_path = &route->path_rec[0];
2491 if (route->num_paths == 2)
2492 req.alternate_path = &route->path_rec[1];
2493
2494 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2495 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2496 req.qp_num = id_priv->qp_num;
9b2e9c0c 2497 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2498 req.starting_psn = id_priv->seq_num;
2499 req.responder_resources = conn_param->responder_resources;
2500 req.initiator_depth = conn_param->initiator_depth;
2501 req.flow_control = conn_param->flow_control;
2502 req.retry_count = conn_param->retry_count;
2503 req.rnr_retry_count = conn_param->rnr_retry_count;
2504 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2505 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2506 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2507 req.srq = id_priv->srq ? 1 : 0;
2508
2509 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2510out:
675a027c
KK		 2511 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2512 ib_destroy_cm_id(id_priv->cm_id.ib);
2513 id_priv->cm_id.ib = NULL;
2514 }
2515
e51060f0
SH		 2516 kfree(private_data);
2517 return ret;
2518}
2519
07ebafba
TT		 2520static int cma_connect_iw(struct rdma_id_private *id_priv,
2521 struct rdma_conn_param *conn_param)
2522{
2523 struct iw_cm_id *cm_id;
2524 struct sockaddr_in* sin;
2525 int ret;
2526 struct iw_cm_conn_param iw_param;
2527
2528 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2529 if (IS_ERR(cm_id)) {
2530 ret = PTR_ERR(cm_id);
2531 goto out;
2532 }
2533
2534 id_priv->cm_id.iw = cm_id;
2535
2536 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2537 cm_id->local_addr = *sin;
2538
2539 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2540 cm_id->remote_addr = *sin;
2541
5851bb89 2542 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2543 if (ret)
2544 goto out;
07ebafba
TT		 2545
2546 iw_param.ord = conn_param->initiator_depth;
2547 iw_param.ird = conn_param->responder_resources;
2548 iw_param.private_data = conn_param->private_data;
2549 iw_param.private_data_len = conn_param->private_data_len;
2550 if (id_priv->id.qp)
2551 iw_param.qpn = id_priv->qp_num;
2552 else
2553 iw_param.qpn = conn_param->qp_num;
2554 ret = iw_cm_connect(cm_id, &iw_param);
2555out:
675a027c
KK		 2556 if (ret && !IS_ERR(cm_id)) {
2557 iw_destroy_cm_id(cm_id);
2558 id_priv->cm_id.iw = NULL;
2559 }
07ebafba
TT		 2560 return ret;
2561}
2562
e51060f0
SH		 2563int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2564{
2565 struct rdma_id_private *id_priv;
2566 int ret;
2567
2568 id_priv = container_of(id, struct rdma_id_private, id);
2569 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2570 return -EINVAL;
2571
2572 if (!id->qp) {
2573 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2574 id_priv->srq = conn_param->srq;
2575 }
2576
07ebafba
TT		 2577 switch (rdma_node_get_transport(id->device->node_type)) {
2578 case RDMA_TRANSPORT_IB:
c8f6a362 2579 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2580 ret = cma_resolve_ib_udp(id_priv, conn_param);
2581 else
2582 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2583 break;
07ebafba
TT		 2584 case RDMA_TRANSPORT_IWARP:
2585 ret = cma_connect_iw(id_priv, conn_param);
2586 break;
e51060f0
SH		 2587 default:
2588 ret = -ENOSYS;
2589 break;
2590 }
2591 if (ret)
2592 goto err;
2593
2594 return 0;
2595err:
2596 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2597 return ret;
2598}
2599EXPORT_SYMBOL(rdma_connect);
2600
2601static int cma_accept_ib(struct rdma_id_private *id_priv,
2602 struct rdma_conn_param *conn_param)
2603{
2604 struct ib_cm_rep_param rep;
5851bb89 2605 int ret;
0fe313b0 2606
5851bb89
SH		 2607 ret = cma_modify_qp_rtr(id_priv, conn_param);
2608 if (ret)
2609 goto out;
0fe313b0 2610
5851bb89
SH		 2611 ret = cma_modify_qp_rts(id_priv, conn_param);
2612 if (ret)
2613 goto out;
e51060f0
SH		 2614
2615 memset(&rep, 0, sizeof rep);
2616 rep.qp_num = id_priv->qp_num;
2617 rep.starting_psn = id_priv->seq_num;
2618 rep.private_data = conn_param->private_data;
2619 rep.private_data_len = conn_param->private_data_len;
2620 rep.responder_resources = conn_param->responder_resources;
2621 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2622 rep.failover_accepted = 0;
2623 rep.flow_control = conn_param->flow_control;
2624 rep.rnr_retry_count = conn_param->rnr_retry_count;
2625 rep.srq = id_priv->srq ? 1 : 0;
2626
0fe313b0
SH		 2627 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2628out:
2629 return ret;
e51060f0
SH		 2630}
2631
07ebafba
TT		 2632static int cma_accept_iw(struct rdma_id_private *id_priv,
2633 struct rdma_conn_param *conn_param)
2634{
2635 struct iw_cm_conn_param iw_param;
2636 int ret;
2637
5851bb89 2638 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2639 if (ret)
2640 return ret;
2641
2642 iw_param.ord = conn_param->initiator_depth;
2643 iw_param.ird = conn_param->responder_resources;
2644 iw_param.private_data = conn_param->private_data;
2645 iw_param.private_data_len = conn_param->private_data_len;
2646 if (id_priv->id.qp) {
2647 iw_param.qpn = id_priv->qp_num;
2648 } else
2649 iw_param.qpn = conn_param->qp_num;
2650
2651 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2652}
2653
628e5f6d
SH		 2654static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2655 enum ib_cm_sidr_status status,
2656 const void *private_data, int private_data_len)
2657{
2658 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2659 int ret;
628e5f6d
SH		 2660
2661 memset(&rep, 0, sizeof rep);
2662 rep.status = status;
2663 if (status == IB_SIDR_SUCCESS) {
d2ca39f2
YE		 2664 ret = cma_set_qkey(id_priv);
2665 if (ret)
2666 return ret;
628e5f6d 2667 rep.qp_num = id_priv->qp_num;
c8f6a362 2668 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2669 }
2670 rep.private_data = private_data;
2671 rep.private_data_len = private_data_len;
2672
2673 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2674}
2675
e51060f0
SH		 2676int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2677{
2678 struct rdma_id_private *id_priv;
2679 int ret;
2680
2681 id_priv = container_of(id, struct rdma_id_private, id);
2682 if (!cma_comp(id_priv, CMA_CONNECT))
2683 return -EINVAL;
2684
2685 if (!id->qp && conn_param) {
2686 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2687 id_priv->srq = conn_param->srq;
2688 }
2689
07ebafba
TT		 2690 switch (rdma_node_get_transport(id->device->node_type)) {
2691 case RDMA_TRANSPORT_IB:
c8f6a362 2692 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2693 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2694 conn_param->private_data,
2695 conn_param->private_data_len);
2696 else if (conn_param)
e51060f0
SH		 2697 ret = cma_accept_ib(id_priv, conn_param);
2698 else
2699 ret = cma_rep_recv(id_priv);
2700 break;
07ebafba
TT		 2701 case RDMA_TRANSPORT_IWARP:
2702 ret = cma_accept_iw(id_priv, conn_param);
2703 break;
e51060f0
SH		 2704 default:
2705 ret = -ENOSYS;
2706 break;
2707 }
2708
2709 if (ret)
2710 goto reject;
2711
2712 return 0;
2713reject:
c5483388 2714 cma_modify_qp_err(id_priv);
e51060f0
SH		 2715 rdma_reject(id, NULL, 0);
2716 return ret;
2717}
2718EXPORT_SYMBOL(rdma_accept);
2719
0fe313b0
SH		 2720int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2721{
2722 struct rdma_id_private *id_priv;
2723 int ret;
2724
2725 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2726 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2727 return -EINVAL;
2728
2729 switch (id->device->node_type) {
2730 case RDMA_NODE_IB_CA:
2731 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2732 break;
2733 default:
2734 ret = 0;
2735 break;
2736 }
2737 return ret;
2738}
2739EXPORT_SYMBOL(rdma_notify);
2740
e51060f0
SH		 2741int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2742 u8 private_data_len)
2743{
2744 struct rdma_id_private *id_priv;
2745 int ret;
2746
2747 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2748 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2749 return -EINVAL;
2750
07ebafba
TT		 2751 switch (rdma_node_get_transport(id->device->node_type)) {
2752 case RDMA_TRANSPORT_IB:
c8f6a362 2753 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2754 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2755 private_data, private_data_len);
2756 else
2757 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2758 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2759 0, private_data, private_data_len);
e51060f0 2760 break;
07ebafba
TT		 2761 case RDMA_TRANSPORT_IWARP:
2762 ret = iw_cm_reject(id_priv->cm_id.iw,
2763 private_data, private_data_len);
2764 break;
e51060f0
SH		 2765 default:
2766 ret = -ENOSYS;
2767 break;
2768 }
2769 return ret;
2770}
2771EXPORT_SYMBOL(rdma_reject);
2772
2773int rdma_disconnect(struct rdma_cm_id *id)
2774{
2775 struct rdma_id_private *id_priv;
2776 int ret;
2777
2778 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2779 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2780 return -EINVAL;
2781
07ebafba
TT		 2782 switch (rdma_node_get_transport(id->device->node_type)) {
2783 case RDMA_TRANSPORT_IB:
c5483388 2784 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2785 if (ret)
2786 goto out;
e51060f0
SH		 2787 /* Initiate or respond to a disconnect. */
2788 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2789 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2790 break;
07ebafba
TT		 2791 case RDMA_TRANSPORT_IWARP:
2792 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2793 break;
e51060f0 2794 default:
07ebafba 2795 ret = -EINVAL;
e51060f0
SH		 2796 break;
2797 }
2798out:
2799 return ret;
2800}
2801EXPORT_SYMBOL(rdma_disconnect);
2802
c8f6a362
SH		 2803static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2804{
2805 struct rdma_id_private *id_priv;
2806 struct cma_multicast *mc = multicast->context;
2807 struct rdma_cm_event event;
2808 int ret;
2809
2810 id_priv = mc->id_priv;
de910bd9
OG		 2811 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2812 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
8aa08602 2813 return 0;
c8f6a362 2814
c5483388 2815 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2816 if (!status && id_priv->id.qp)
2817 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2818 multicast->rec.mlid);
c5483388 2819 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2820
2821 memset(&event, 0, sizeof event);
2822 event.status = status;
2823 event.param.ud.private_data = mc->context;
2824 if (!status) {
2825 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2826 ib_init_ah_from_mcmember(id_priv->id.device,
2827 id_priv->id.port_num, &multicast->rec,
2828 &event.param.ud.ah_attr);
2829 event.param.ud.qp_num = 0xFFFFFF;
2830 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2831 } else
2832 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2833
2834 ret = id_priv->id.event_handler(&id_priv->id, &event);
2835 if (ret) {
2836 cma_exch(id_priv, CMA_DESTROYING);
de910bd9 2837 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2838 rdma_destroy_id(&id_priv->id);
2839 return 0;
2840 }
8aa08602 2841
de910bd9 2842 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2843 return 0;
2844}
2845
2846static void cma_set_mgid(struct rdma_id_private *id_priv,
2847 struct sockaddr *addr, union ib_gid *mgid)
2848{
2849 unsigned char mc_map[MAX_ADDR_LEN];
2850 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2851 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2852 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2853
2854 if (cma_any_addr(addr)) {
2855 memset(mgid, 0, sizeof *mgid);
2856 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 2857 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 2858 0xFF10A01B)) {
2859 /* IPv6 address is an SA assigned MGID. */
2860 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
e2e62697
JG		 2861 } else if ((addr->sa_family == AF_INET6)) {
2862 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2863 if (id_priv->id.ps == RDMA_PS_UDP)
2864 mc_map[7] = 0x01; /* Use RDMA CM signature */
2865 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 2866 } else {
a9e527e3 2867 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2868 if (id_priv->id.ps == RDMA_PS_UDP)
2869 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2870 *mgid = *(union ib_gid *) (mc_map + 4);
2871 }
2872}
2873
2874static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2875 struct cma_multicast *mc)
2876{
2877 struct ib_sa_mcmember_rec rec;
2878 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2879 ib_sa_comp_mask comp_mask;
2880 int ret;
2881
2882 ib_addr_get_mgid(dev_addr, &rec.mgid);
2883 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2884 &rec.mgid, &rec);
2885 if (ret)
2886 return ret;
2887
3f446754 2888 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 2889 if (id_priv->id.ps == RDMA_PS_UDP)
2890 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
6f8372b6 2891 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 2892 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2893 rec.join_state = 1;
2894
2895 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2896 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2897 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2898 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2899 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2900
84adeee9
YE		 2901 if (id_priv->id.ps == RDMA_PS_IPOIB)
2902 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2903 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2904
c8f6a362
SH		 2905 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2906 id_priv->id.port_num, &rec,
2907 comp_mask, GFP_KERNEL,
2908 cma_ib_mc_handler, mc);
2909 if (IS_ERR(mc->multicast.ib))
2910 return PTR_ERR(mc->multicast.ib);
2911
2912 return 0;
2913}
2914
3c86aa70
EC		 2915static void iboe_mcast_work_handler(struct work_struct *work)
2916{
2917 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
2918 struct cma_multicast *mc = mw->mc;
2919 struct ib_sa_multicast *m = mc->multicast.ib;
2920
2921 mc->multicast.ib->context = mc;
2922 cma_ib_mc_handler(0, m);
2923 kref_put(&mc->mcref, release_mc);
2924 kfree(mw);
2925}
2926
2927static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
2928{
2929 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
2930 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
2931
2932 if (cma_any_addr(addr)) {
2933 memset(mgid, 0, sizeof *mgid);
2934 } else if (addr->sa_family == AF_INET6) {
2935 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2936 } else {
2937 mgid->raw[0] = 0xff;
2938 mgid->raw[1] = 0x0e;
2939 mgid->raw[2] = 0;
2940 mgid->raw[3] = 0;
2941 mgid->raw[4] = 0;
2942 mgid->raw[5] = 0;
2943 mgid->raw[6] = 0;
2944 mgid->raw[7] = 0;
2945 mgid->raw[8] = 0;
2946 mgid->raw[9] = 0;
2947 mgid->raw[10] = 0xff;
2948 mgid->raw[11] = 0xff;
2949 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
2950 }
2951}
2952
2953static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
2954 struct cma_multicast *mc)
2955{
2956 struct iboe_mcast_work *work;
2957 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2958 int err;
2959 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
2960 struct net_device *ndev = NULL;
2961
2962 if (cma_zero_addr((struct sockaddr *)&mc->addr))
2963 return -EINVAL;
2964
2965 work = kzalloc(sizeof *work, GFP_KERNEL);
2966 if (!work)
2967 return -ENOMEM;
2968
2969 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
2970 if (!mc->multicast.ib) {
2971 err = -ENOMEM;
2972 goto out1;
2973 }
2974
2975 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
2976
2977 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
2978 if (id_priv->id.ps == RDMA_PS_UDP)
2979 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2980
2981 if (dev_addr->bound_dev_if)
2982 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
2983 if (!ndev) {
2984 err = -ENODEV;
2985 goto out2;
2986 }
2987 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
2988 mc->multicast.ib->rec.hop_limit = 1;
2989 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
2990 dev_put(ndev);
2991 if (!mc->multicast.ib->rec.mtu) {
2992 err = -EINVAL;
2993 goto out2;
2994 }
2995 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
2996 work->id = id_priv;
2997 work->mc = mc;
2998 INIT_WORK(&work->work, iboe_mcast_work_handler);
2999 kref_get(&mc->mcref);
3000 queue_work(cma_wq, &work->work);
3001
3002 return 0;
3003
3004out2:
3005 kfree(mc->multicast.ib);
3006out1:
3007 kfree(work);
3008 return err;
3009}
3010
c8f6a362
SH		 3011int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3012 void *context)
3013{
3014 struct rdma_id_private *id_priv;
3015 struct cma_multicast *mc;
3016 int ret;
3017
3018 id_priv = container_of(id, struct rdma_id_private, id);
3019 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
3020 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
3021 return -EINVAL;
3022
3023 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3024 if (!mc)
3025 return -ENOMEM;
3026
3027 memcpy(&mc->addr, addr, ip_addr_size(addr));
3028 mc->context = context;
3029 mc->id_priv = id_priv;
3030
3031 spin_lock(&id_priv->lock);
3032 list_add(&mc->list, &id_priv->mc_list);
3033 spin_unlock(&id_priv->lock);
3034
3035 switch (rdma_node_get_transport(id->device->node_type)) {
3036 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 3037 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3038 case IB_LINK_LAYER_INFINIBAND:
3039 ret = cma_join_ib_multicast(id_priv, mc);
3040 break;
3041 case IB_LINK_LAYER_ETHERNET:
3042 kref_init(&mc->mcref);
3043 ret = cma_iboe_join_multicast(id_priv, mc);
3044 break;
3045 default:
3046 ret = -EINVAL;
3047 }
c8f6a362
SH		 3048 break;
3049 default:
3050 ret = -ENOSYS;
3051 break;
3052 }
3053
3054 if (ret) {
3055 spin_lock_irq(&id_priv->lock);
3056 list_del(&mc->list);
3057 spin_unlock_irq(&id_priv->lock);
3058 kfree(mc);
3059 }
3060 return ret;
3061}
3062EXPORT_SYMBOL(rdma_join_multicast);
3063
3064void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3065{
3066 struct rdma_id_private *id_priv;
3067 struct cma_multicast *mc;
3068
3069 id_priv = container_of(id, struct rdma_id_private, id);
3070 spin_lock_irq(&id_priv->lock);
3071 list_for_each_entry(mc, &id_priv->mc_list, list) {
3072 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3073 list_del(&mc->list);
3074 spin_unlock_irq(&id_priv->lock);
3075
3076 if (id->qp)
3077 ib_detach_mcast(id->qp,
3078 &mc->multicast.ib->rec.mgid,
3079 mc->multicast.ib->rec.mlid);
3c86aa70
EC		 3080 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3081 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3082 case IB_LINK_LAYER_INFINIBAND:
3083 ib_sa_free_multicast(mc->multicast.ib);
3084 kfree(mc);
3085 break;
3086 case IB_LINK_LAYER_ETHERNET:
3087 kref_put(&mc->mcref, release_mc);
3088 break;
3089 default:
3090 break;
3091 }
3092 }
c8f6a362
SH		 3093 return;
3094 }
3095 }
3096 spin_unlock_irq(&id_priv->lock);
3097}
3098EXPORT_SYMBOL(rdma_leave_multicast);
3099
dd5bdff8
OG		 3100static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3101{
3102 struct rdma_dev_addr *dev_addr;
3103 struct cma_ndev_work *work;
3104
3105 dev_addr = &id_priv->id.route.addr.dev_addr;
3106
6266ed6e 3107 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 3108 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3109 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3110 ndev->name, &id_priv->id);
3111 work = kzalloc(sizeof *work, GFP_KERNEL);
3112 if (!work)
3113 return -ENOMEM;
3114
3115 INIT_WORK(&work->work, cma_ndev_work_handler);
3116 work->id = id_priv;
3117 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3118 atomic_inc(&id_priv->refcount);
3119 queue_work(cma_wq, &work->work);
3120 }
3121
3122 return 0;
3123}
3124
3125static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3126 void *ctx)
3127{
3128 struct net_device *ndev = (struct net_device *)ctx;
3129 struct cma_device *cma_dev;
3130 struct rdma_id_private *id_priv;
3131 int ret = NOTIFY_DONE;
3132
3133 if (dev_net(ndev) != &init_net)
3134 return NOTIFY_DONE;
3135
3136 if (event != NETDEV_BONDING_FAILOVER)
3137 return NOTIFY_DONE;
3138
3139 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3140 return NOTIFY_DONE;
3141
3142 mutex_lock(&lock);
3143 list_for_each_entry(cma_dev, &dev_list, list)
3144 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3145 ret = cma_netdev_change(ndev, id_priv);
3146 if (ret)
3147 goto out;
3148 }
3149
3150out:
3151 mutex_unlock(&lock);
3152 return ret;
3153}
3154
3155static struct notifier_block cma_nb = {
3156 .notifier_call = cma_netdev_callback
3157};
3158
e51060f0
SH		 3159static void cma_add_one(struct ib_device *device)
3160{
3161 struct cma_device *cma_dev;
3162 struct rdma_id_private *id_priv;
3163
3164 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3165 if (!cma_dev)
3166 return;
3167
3168 cma_dev->device = device;
e51060f0
SH		 3169
3170 init_completion(&cma_dev->comp);
3171 atomic_set(&cma_dev->refcount, 1);
3172 INIT_LIST_HEAD(&cma_dev->id_list);
3173 ib_set_client_data(device, &cma_client, cma_dev);
3174
3175 mutex_lock(&lock);
3176 list_add_tail(&cma_dev->list, &dev_list);
3177 list_for_each_entry(id_priv, &listen_any_list, list)
3178 cma_listen_on_dev(id_priv, cma_dev);
3179 mutex_unlock(&lock);
e51060f0
SH		 3180}
3181
3182static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3183{
a1b1b61f 3184 struct rdma_cm_event event;
e51060f0 3185 enum cma_state state;
de910bd9 3186 int ret = 0;
e51060f0
SH		 3187
3188 /* Record that we want to remove the device */
3189 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
3190 if (state == CMA_DESTROYING)
3191 return 0;
3192
3193 cma_cancel_operation(id_priv, state);
de910bd9 3194 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 3195
3196 /* Check for destruction from another callback. */
3197 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
de910bd9 3198 goto out;
e51060f0 3199
a1b1b61f
SH		 3200 memset(&event, 0, sizeof event);
3201 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 3202 ret = id_priv->id.event_handler(&id_priv->id, &event);
3203out:
3204 mutex_unlock(&id_priv->handler_mutex);
3205 return ret;
e51060f0
SH		 3206}
3207
3208static void cma_process_remove(struct cma_device *cma_dev)
3209{
e51060f0
SH		 3210 struct rdma_id_private *id_priv;
3211 int ret;
3212
e51060f0
SH		 3213 mutex_lock(&lock);
3214 while (!list_empty(&cma_dev->id_list)) {
3215 id_priv = list_entry(cma_dev->id_list.next,
3216 struct rdma_id_private, list);
3217
d02d1f53 3218 list_del(&id_priv->listen_list);
94de178a 3219 list_del_init(&id_priv->list);
e51060f0
SH		 3220 atomic_inc(&id_priv->refcount);
3221 mutex_unlock(&lock);
3222
d02d1f53 3223 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 3224 cma_deref_id(id_priv);
3225 if (ret)
3226 rdma_destroy_id(&id_priv->id);
3227
3228 mutex_lock(&lock);
3229 }
3230 mutex_unlock(&lock);
3231
3232 cma_deref_dev(cma_dev);
3233 wait_for_completion(&cma_dev->comp);
3234}
3235
3236static void cma_remove_one(struct ib_device *device)
3237{
3238 struct cma_device *cma_dev;
3239
3240 cma_dev = ib_get_client_data(device, &cma_client);
3241 if (!cma_dev)
3242 return;
3243
3244 mutex_lock(&lock);
3245 list_del(&cma_dev->list);
3246 mutex_unlock(&lock);
3247
3248 cma_process_remove(cma_dev);
3249 kfree(cma_dev);
3250}
3251
716abb1f 3252static int __init cma_init(void)
e51060f0 3253{
5d7220e8 3254 int ret;
227b60f5 3255
c7f743a6 3256 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 3257 if (!cma_wq)
3258 return -ENOMEM;
3259
c1a0b23b 3260 ib_sa_register_client(&sa_client);
7a118df3 3261 rdma_addr_register_client(&addr_client);
dd5bdff8 3262 register_netdevice_notifier(&cma_nb);
c1a0b23b 3263
e51060f0
SH		 3264 ret = ib_register_client(&cma_client);
3265 if (ret)
3266 goto err;
3267 return 0;
3268
3269err:
dd5bdff8 3270 unregister_netdevice_notifier(&cma_nb);
7a118df3 3271 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3272 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3273 destroy_workqueue(cma_wq);
3274 return ret;
3275}
3276
716abb1f 3277static void __exit cma_cleanup(void)
e51060f0
SH		 3278{
3279 ib_unregister_client(&cma_client);
dd5bdff8 3280 unregister_netdevice_notifier(&cma_nb);
7a118df3 3281 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3282 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3283 destroy_workqueue(cma_wq);
3284 idr_destroy(&sdp_ps);
3285 idr_destroy(&tcp_ps);
628e5f6d 3286 idr_destroy(&udp_ps);
c8f6a362 3287 idr_destroy(&ipoib_ps);
e51060f0
SH		 3288}
3289
3290module_init(cma_init);
3291module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)