projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Linux 3.5-rc5
[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>
e4dd23d7 44#include <linux/module.h>
366cddb4 45#include <net/route.h>
e51060f0
SH		 46
47#include <net/tcp.h>
1f5175ad 48#include <net/ipv6.h>
e51060f0
SH		 49
50#include <rdma/rdma_cm.h>
51#include <rdma/rdma_cm_ib.h>
753f618a 52#include <rdma/rdma_netlink.h>
e51060f0
SH		 53#include <rdma/ib_cache.h>
54#include <rdma/ib_cm.h>
55#include <rdma/ib_sa.h>
07ebafba 56#include <rdma/iw_cm.h>
e51060f0
SH		 57
58MODULE_AUTHOR("Sean Hefty");
59MODULE_DESCRIPTION("Generic RDMA CM Agent");
60MODULE_LICENSE("Dual BSD/GPL");
61
62#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 63#define CMA_MAX_CM_RETRIES 15
dcb3f974 64#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 65#define CMA_IBOE_PACKET_LIFETIME 18
e51060f0
SH		 66
67static void cma_add_one(struct ib_device *device);
68static void cma_remove_one(struct ib_device *device);
69
70static struct ib_client cma_client = {
71 .name = "cma",
72 .add = cma_add_one,
73 .remove = cma_remove_one
74};
75
c1a0b23b 76static struct ib_sa_client sa_client;
7a118df3 77static struct rdma_addr_client addr_client;
e51060f0
SH		 78static LIST_HEAD(dev_list);
79static LIST_HEAD(listen_any_list);
80static DEFINE_MUTEX(lock);
81static struct workqueue_struct *cma_wq;
82static DEFINE_IDR(sdp_ps);
83static DEFINE_IDR(tcp_ps);
628e5f6d 84static DEFINE_IDR(udp_ps);
c8f6a362 85static DEFINE_IDR(ipoib_ps);
2d2e9415 86static DEFINE_IDR(ib_ps);
e51060f0
SH		 87
88struct cma_device {
89 struct list_head list;
90 struct ib_device *device;
e51060f0
SH		 91 struct completion comp;
92 atomic_t refcount;
93 struct list_head id_list;
94};
95
e51060f0
SH		 96struct rdma_bind_list {
97 struct idr *ps;
98 struct hlist_head owners;
99 unsigned short port;
100};
101
102/*
103 * Device removal can occur at anytime, so we need extra handling to
104 * serialize notifying the user of device removal with other callbacks.
105 * We do this by disabling removal notification while a callback is in process,
106 * and reporting it after the callback completes.
107 */
108struct rdma_id_private {
109 struct rdma_cm_id id;
110
111 struct rdma_bind_list *bind_list;
112 struct hlist_node node;
d02d1f53
SH		 113 struct list_head list; /* listen_any_list or cma_device.list */
114 struct list_head listen_list; /* per device listens */
e51060f0 115 struct cma_device *cma_dev;
c8f6a362 116 struct list_head mc_list;
e51060f0 117
d02d1f53 118 int internal_id;
550e5ca7 119 enum rdma_cm_state state;
e51060f0 120 spinlock_t lock;
c5483388
SH		 121 struct mutex qp_mutex;
122
e51060f0
SH		 123 struct completion comp;
124 atomic_t refcount;
de910bd9 125 struct mutex handler_mutex;
e51060f0
SH		 126
127 int backlog;
128 int timeout_ms;
129 struct ib_sa_query *query;
130 int query_id;
131 union {
132 struct ib_cm_id *ib;
07ebafba 133 struct iw_cm_id *iw;
e51060f0
SH		 134 } cm_id;
135
136 u32 seq_num;
c8f6a362 137 u32 qkey;
e51060f0 138 u32 qp_num;
83e9502d 139 pid_t owner;
e51060f0 140 u8 srq;
a81c994d 141 u8 tos;
a9bb7912 142 u8 reuseaddr;
e51060f0
SH		 143};
144
c8f6a362
SH		 145struct cma_multicast {
146 struct rdma_id_private *id_priv;
147 union {
148 struct ib_sa_multicast *ib;
149 } multicast;
150 struct list_head list;
151 void *context;
3f446754 152 struct sockaddr_storage addr;
3c86aa70 153 struct kref mcref;
c8f6a362
SH		 154};
155
e51060f0
SH		 156struct cma_work {
157 struct work_struct work;
158 struct rdma_id_private *id;
550e5ca7
NM		 159 enum rdma_cm_state old_state;
160 enum rdma_cm_state new_state;
e51060f0
SH		 161 struct rdma_cm_event event;
162};
163
dd5bdff8
OG		 164struct cma_ndev_work {
165 struct work_struct work;
166 struct rdma_id_private *id;
167 struct rdma_cm_event event;
168};
169
3c86aa70
EC		 170struct iboe_mcast_work {
171 struct work_struct work;
172 struct rdma_id_private *id;
173 struct cma_multicast *mc;
174};
175
e51060f0
SH		 176union cma_ip_addr {
177 struct in6_addr ip6;
178 struct {
1b90c137
AV		 179 __be32 pad[3];
180 __be32 addr;
e51060f0
SH		 181 } ip4;
182};
183
184struct cma_hdr {
185 u8 cma_version;
186 u8 ip_version; /* IP version: 7:4 */
1b90c137 187 __be16 port;
e51060f0
SH		 188 union cma_ip_addr src_addr;
189 union cma_ip_addr dst_addr;
190};
191
192struct sdp_hh {
193 u8 bsdh[16];
194 u8 sdp_version; /* Major version: 7:4 */
195 u8 ip_version; /* IP version: 7:4 */
196 u8 sdp_specific1[10];
1b90c137
AV		 197 __be16 port;
198 __be16 sdp_specific2;
e51060f0
SH		 199 union cma_ip_addr src_addr;
200 union cma_ip_addr dst_addr;
201};
202
203struct sdp_hah {
204 u8 bsdh[16];
205 u8 sdp_version;
206};
207
208#define CMA_VERSION 0x00
209#define SDP_MAJ_VERSION 0x2
210
550e5ca7 211static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
e51060f0
SH		 212{
213 unsigned long flags;
214 int ret;
215
216 spin_lock_irqsave(&id_priv->lock, flags);
217 ret = (id_priv->state == comp);
218 spin_unlock_irqrestore(&id_priv->lock, flags);
219 return ret;
220}
221
222static int cma_comp_exch(struct rdma_id_private *id_priv,
550e5ca7 223 enum rdma_cm_state comp, enum rdma_cm_state exch)
e51060f0
SH		 224{
225 unsigned long flags;
226 int ret;
227
228 spin_lock_irqsave(&id_priv->lock, flags);
229 if ((ret = (id_priv->state == comp)))
230 id_priv->state = exch;
231 spin_unlock_irqrestore(&id_priv->lock, flags);
232 return ret;
233}
234
550e5ca7
NM		 235static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
236 enum rdma_cm_state exch)
e51060f0
SH		 237{
238 unsigned long flags;
550e5ca7 239 enum rdma_cm_state old;
e51060f0
SH		 240
241 spin_lock_irqsave(&id_priv->lock, flags);
242 old = id_priv->state;
243 id_priv->state = exch;
244 spin_unlock_irqrestore(&id_priv->lock, flags);
245 return old;
246}
247
248static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
249{
250 return hdr->ip_version >> 4;
251}
252
253static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
254{
255 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
256}
257
258static inline u8 sdp_get_majv(u8 sdp_version)
259{
260 return sdp_version >> 4;
261}
262
263static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
264{
265 return hh->ip_version >> 4;
266}
267
268static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
269{
270 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
271}
272
273static void cma_attach_to_dev(struct rdma_id_private *id_priv,
274 struct cma_device *cma_dev)
275{
276 atomic_inc(&cma_dev->refcount);
277 id_priv->cma_dev = cma_dev;
278 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 279 id_priv->id.route.addr.dev_addr.transport =
280 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0
SH		 281 list_add_tail(&id_priv->list, &cma_dev->id_list);
282}
283
284static inline void cma_deref_dev(struct cma_device *cma_dev)
285{
286 if (atomic_dec_and_test(&cma_dev->refcount))
287 complete(&cma_dev->comp);
288}
289
3c86aa70
EC		 290static inline void release_mc(struct kref *kref)
291{
292 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
293
294 kfree(mc->multicast.ib);
295 kfree(mc);
296}
297
a396d43a 298static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 299{
a396d43a 300 mutex_lock(&lock);
e51060f0
SH		 301 list_del(&id_priv->list);
302 cma_deref_dev(id_priv->cma_dev);
303 id_priv->cma_dev = NULL;
a396d43a 304 mutex_unlock(&lock);
e51060f0
SH		 305}
306
d2ca39f2 307static int cma_set_qkey(struct rdma_id_private *id_priv)
c8f6a362
SH		 308{
309 struct ib_sa_mcmember_rec rec;
310 int ret = 0;
311
d2ca39f2
YE		 312 if (id_priv->qkey)
313 return 0;
314
315 switch (id_priv->id.ps) {
c8f6a362 316 case RDMA_PS_UDP:
d2ca39f2 317 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 318 break;
319 case RDMA_PS_IPOIB:
d2ca39f2
YE		 320 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
321 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
322 id_priv->id.port_num, &rec.mgid,
323 &rec);
324 if (!ret)
325 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 326 break;
327 default:
328 break;
329 }
330 return ret;
331}
332
3c86aa70
EC		 333static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
334{
335 int i;
336 int err;
337 struct ib_port_attr props;
338 union ib_gid tmp;
339
340 err = ib_query_port(device, port_num, &props);
341 if (err)
342 return 1;
343
344 for (i = 0; i < props.gid_tbl_len; ++i) {
345 err = ib_query_gid(device, port_num, i, &tmp);
346 if (err)
347 return 1;
348 if (!memcmp(&tmp, gid, sizeof tmp))
349 return 0;
350 }
351
352 return -EAGAIN;
353}
354
07ebafba 355static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 356{
c8f6a362 357 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 358 struct cma_device *cma_dev;
3c86aa70 359 union ib_gid gid, iboe_gid;
e51060f0 360 int ret = -ENODEV;
3c86aa70
EC		 361 u8 port;
362 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
363 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
e51060f0 364
2efdd6a0
MS		 365 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
366 id_priv->id.ps == RDMA_PS_IPOIB)
367 return -EINVAL;
368
a396d43a 369 mutex_lock(&lock);
3c86aa70
EC		 370 iboe_addr_get_sgid(dev_addr, &iboe_gid);
371 memcpy(&gid, dev_addr->src_dev_addr +
372 rdma_addr_gid_offset(dev_addr), sizeof gid);
e51060f0 373 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70
EC		 374 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
375 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
376 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
377 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
378 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
379 else
380 ret = find_gid_port(cma_dev->device, &gid, port);
381
382 if (!ret) {
383 id_priv->id.port_num = port;
384 goto out;
385 } else if (ret == 1)
386 break;
387 }
e51060f0
SH		 388 }
389 }
3c86aa70
EC		 390
391out:
392 if (!ret)
393 cma_attach_to_dev(id_priv, cma_dev);
394
a396d43a 395 mutex_unlock(&lock);
e51060f0
SH		 396 return ret;
397}
398
e51060f0
SH		 399static void cma_deref_id(struct rdma_id_private *id_priv)
400{
401 if (atomic_dec_and_test(&id_priv->refcount))
402 complete(&id_priv->comp);
403}
404
de910bd9 405static int cma_disable_callback(struct rdma_id_private *id_priv,
550e5ca7 406 enum rdma_cm_state state)
8aa08602 407{
de910bd9
OG		 408 mutex_lock(&id_priv->handler_mutex);
409 if (id_priv->state != state) {
410 mutex_unlock(&id_priv->handler_mutex);
411 return -EINVAL;
412 }
413 return 0;
e51060f0
SH		 414}
415
416struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
b26f9b99
SH		 417 void *context, enum rdma_port_space ps,
418 enum ib_qp_type qp_type)
e51060f0
SH		 419{
420 struct rdma_id_private *id_priv;
421
422 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
423 if (!id_priv)
424 return ERR_PTR(-ENOMEM);
425
83e9502d 426 id_priv->owner = task_pid_nr(current);
550e5ca7 427 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 428 id_priv->id.context = context;
429 id_priv->id.event_handler = event_handler;
430 id_priv->id.ps = ps;
b26f9b99 431 id_priv->id.qp_type = qp_type;
e51060f0 432 spin_lock_init(&id_priv->lock);
c5483388 433 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 434 init_completion(&id_priv->comp);
435 atomic_set(&id_priv->refcount, 1);
de910bd9 436 mutex_init(&id_priv->handler_mutex);
e51060f0 437 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 438 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 439 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
440
441 return &id_priv->id;
442}
443EXPORT_SYMBOL(rdma_create_id);
444
c8f6a362 445static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 446{
447 struct ib_qp_attr qp_attr;
c8f6a362 448 int qp_attr_mask, ret;
e51060f0 449
c8f6a362
SH		 450 qp_attr.qp_state = IB_QPS_INIT;
451 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 452 if (ret)
453 return ret;
454
c8f6a362
SH		 455 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
456 if (ret)
457 return ret;
458
459 qp_attr.qp_state = IB_QPS_RTR;
460 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
461 if (ret)
462 return ret;
463
464 qp_attr.qp_state = IB_QPS_RTS;
465 qp_attr.sq_psn = 0;
466 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
467
468 return ret;
e51060f0
SH		 469}
470
c8f6a362 471static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 472{
473 struct ib_qp_attr qp_attr;
c8f6a362 474 int qp_attr_mask, ret;
07ebafba
TT		 475
476 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 477 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
478 if (ret)
479 return ret;
07ebafba 480
c8f6a362 481 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 482}
483
e51060f0
SH		 484int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
485 struct ib_qp_init_attr *qp_init_attr)
486{
487 struct rdma_id_private *id_priv;
488 struct ib_qp *qp;
489 int ret;
490
491 id_priv = container_of(id, struct rdma_id_private, id);
492 if (id->device != pd->device)
493 return -EINVAL;
494
495 qp = ib_create_qp(pd, qp_init_attr);
496 if (IS_ERR(qp))
497 return PTR_ERR(qp);
498
b26f9b99 499 if (id->qp_type == IB_QPT_UD)
c8f6a362
SH		 500 ret = cma_init_ud_qp(id_priv, qp);
501 else
502 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 503 if (ret)
504 goto err;
505
506 id->qp = qp;
507 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 508 id_priv->srq = (qp->srq != NULL);
509 return 0;
510err:
511 ib_destroy_qp(qp);
512 return ret;
513}
514EXPORT_SYMBOL(rdma_create_qp);
515
516void rdma_destroy_qp(struct rdma_cm_id *id)
517{
c5483388
SH		 518 struct rdma_id_private *id_priv;
519
520 id_priv = container_of(id, struct rdma_id_private, id);
521 mutex_lock(&id_priv->qp_mutex);
522 ib_destroy_qp(id_priv->id.qp);
523 id_priv->id.qp = NULL;
524 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 525}
526EXPORT_SYMBOL(rdma_destroy_qp);
527
5851bb89
SH		 528static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
529 struct rdma_conn_param *conn_param)
e51060f0
SH		 530{
531 struct ib_qp_attr qp_attr;
532 int qp_attr_mask, ret;
533
c5483388
SH		 534 mutex_lock(&id_priv->qp_mutex);
535 if (!id_priv->id.qp) {
536 ret = 0;
537 goto out;
538 }
e51060f0
SH		 539
540 /* Need to update QP attributes from default values. */
541 qp_attr.qp_state = IB_QPS_INIT;
c5483388 542 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 543 if (ret)
c5483388 544 goto out;
e51060f0 545
c5483388 546 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 547 if (ret)
c5483388 548 goto out;
e51060f0
SH		 549
550 qp_attr.qp_state = IB_QPS_RTR;
c5483388 551 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 552 if (ret)
c5483388 553 goto out;
e51060f0 554
5851bb89
SH		 555 if (conn_param)
556 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 557 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
558out:
559 mutex_unlock(&id_priv->qp_mutex);
560 return ret;
e51060f0
SH		 561}
562
5851bb89
SH		 563static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
564 struct rdma_conn_param *conn_param)
e51060f0
SH		 565{
566 struct ib_qp_attr qp_attr;
567 int qp_attr_mask, ret;
568
c5483388
SH		 569 mutex_lock(&id_priv->qp_mutex);
570 if (!id_priv->id.qp) {
571 ret = 0;
572 goto out;
573 }
e51060f0
SH		 574
575 qp_attr.qp_state = IB_QPS_RTS;
c5483388 576 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 577 if (ret)
c5483388 578 goto out;
e51060f0 579
5851bb89
SH		 580 if (conn_param)
581 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 582 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
583out:
584 mutex_unlock(&id_priv->qp_mutex);
585 return ret;
e51060f0
SH		 586}
587
c5483388 588static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 589{
590 struct ib_qp_attr qp_attr;
c5483388 591 int ret;
e51060f0 592
c5483388
SH		 593 mutex_lock(&id_priv->qp_mutex);
594 if (!id_priv->id.qp) {
595 ret = 0;
596 goto out;
597 }
e51060f0
SH		 598
599 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 600 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
601out:
602 mutex_unlock(&id_priv->qp_mutex);
603 return ret;
e51060f0
SH		 604}
605
c8f6a362
SH		 606static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
607 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
608{
609 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
610 int ret;
3c86aa70
EC		 611 u16 pkey;
612
613 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
614 IB_LINK_LAYER_INFINIBAND)
615 pkey = ib_addr_get_pkey(dev_addr);
616 else
617 pkey = 0xffff;
c8f6a362
SH		 618
619 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 620 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 621 if (ret)
622 return ret;
623
624 qp_attr->port_num = id_priv->id.port_num;
625 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
626
b26f9b99 627 if (id_priv->id.qp_type == IB_QPT_UD) {
d2ca39f2
YE		 628 ret = cma_set_qkey(id_priv);
629 if (ret)
630 return ret;
631
c8f6a362
SH		 632 qp_attr->qkey = id_priv->qkey;
633 *qp_attr_mask |= IB_QP_QKEY;
634 } else {
635 qp_attr->qp_access_flags = 0;
636 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
637 }
638 return 0;
639}
640
e51060f0
SH		 641int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
642 int *qp_attr_mask)
643{
644 struct rdma_id_private *id_priv;
c8f6a362 645 int ret = 0;
e51060f0
SH		 646
647 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 648 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
649 case RDMA_TRANSPORT_IB:
b26f9b99 650 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 651 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
652 else
653 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
654 qp_attr_mask);
e51060f0
SH		 655 if (qp_attr->qp_state == IB_QPS_RTR)
656 qp_attr->rq_psn = id_priv->seq_num;
657 break;
07ebafba 658 case RDMA_TRANSPORT_IWARP:
c8f6a362 659 if (!id_priv->cm_id.iw) {
8f076531 660 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 661 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
662 } else
663 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
664 qp_attr_mask);
07ebafba 665 break;
e51060f0
SH		 666 default:
667 ret = -ENOSYS;
668 break;
669 }
670
671 return ret;
672}
673EXPORT_SYMBOL(rdma_init_qp_attr);
674
675static inline int cma_zero_addr(struct sockaddr *addr)
676{
677 struct in6_addr *ip6;
678
679 if (addr->sa_family == AF_INET)
6360a02a
JP		 680 return ipv4_is_zeronet(
681 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
e51060f0
SH		 682 else {
683 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
684 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 685 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 686 }
687}
688
689static inline int cma_loopback_addr(struct sockaddr *addr)
690{
1f5175ad
AS		 691 if (addr->sa_family == AF_INET)
692 return ipv4_is_loopback(
693 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
694 else
695 return ipv6_addr_loopback(
696 &((struct sockaddr_in6 *) addr)->sin6_addr);
e51060f0
SH		 697}
698
699static inline int cma_any_addr(struct sockaddr *addr)
700{
701 return cma_zero_addr(addr) || cma_loopback_addr(addr);
702}
703
43b752da
HS		 704static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
705{
706 if (src->sa_family != dst->sa_family)
707 return -1;
708
709 switch (src->sa_family) {
710 case AF_INET:
711 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
712 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
713 default:
714 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
715 &((struct sockaddr_in6 *) dst)->sin6_addr);
716 }
717}
718
628e5f6d
SH		 719static inline __be16 cma_port(struct sockaddr *addr)
720{
721 if (addr->sa_family == AF_INET)
722 return ((struct sockaddr_in *) addr)->sin_port;
723 else
724 return ((struct sockaddr_in6 *) addr)->sin6_port;
725}
726
e51060f0
SH		 727static inline int cma_any_port(struct sockaddr *addr)
728{
628e5f6d 729 return !cma_port(addr);
e51060f0
SH		 730}
731
732static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
1b90c137 733 u8 *ip_ver, __be16 *port,
e51060f0
SH		 734 union cma_ip_addr **src, union cma_ip_addr **dst)
735{
736 switch (ps) {
737 case RDMA_PS_SDP:
738 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
739 SDP_MAJ_VERSION)
740 return -EINVAL;
741
742 *ip_ver = sdp_get_ip_ver(hdr);
743 *port = ((struct sdp_hh *) hdr)->port;
744 *src = &((struct sdp_hh *) hdr)->src_addr;
745 *dst = &((struct sdp_hh *) hdr)->dst_addr;
746 break;
747 default:
748 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
749 return -EINVAL;
750
751 *ip_ver = cma_get_ip_ver(hdr);
752 *port = ((struct cma_hdr *) hdr)->port;
753 *src = &((struct cma_hdr *) hdr)->src_addr;
754 *dst = &((struct cma_hdr *) hdr)->dst_addr;
755 break;
756 }
757
758 if (*ip_ver != 4 && *ip_ver != 6)
759 return -EINVAL;
760 return 0;
761}
762
763static void cma_save_net_info(struct rdma_addr *addr,
764 struct rdma_addr *listen_addr,
1b90c137 765 u8 ip_ver, __be16 port,
e51060f0
SH		 766 union cma_ip_addr *src, union cma_ip_addr *dst)
767{
768 struct sockaddr_in *listen4, *ip4;
769 struct sockaddr_in6 *listen6, *ip6;
770
771 switch (ip_ver) {
772 case 4:
773 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
774 ip4 = (struct sockaddr_in *) &addr->src_addr;
775 ip4->sin_family = listen4->sin_family;
776 ip4->sin_addr.s_addr = dst->ip4.addr;
777 ip4->sin_port = listen4->sin_port;
778
779 ip4 = (struct sockaddr_in *) &addr->dst_addr;
780 ip4->sin_family = listen4->sin_family;
781 ip4->sin_addr.s_addr = src->ip4.addr;
782 ip4->sin_port = port;
783 break;
784 case 6:
785 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
786 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
787 ip6->sin6_family = listen6->sin6_family;
788 ip6->sin6_addr = dst->ip6;
789 ip6->sin6_port = listen6->sin6_port;
790
791 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
792 ip6->sin6_family = listen6->sin6_family;
793 ip6->sin6_addr = src->ip6;
794 ip6->sin6_port = port;
795 break;
796 default:
797 break;
798 }
799}
800
801static inline int cma_user_data_offset(enum rdma_port_space ps)
802{
803 switch (ps) {
804 case RDMA_PS_SDP:
805 return 0;
806 default:
807 return sizeof(struct cma_hdr);
808 }
809}
810
e51060f0
SH		 811static void cma_cancel_route(struct rdma_id_private *id_priv)
812{
3c86aa70
EC		 813 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
814 case IB_LINK_LAYER_INFINIBAND:
e51060f0
SH		 815 if (id_priv->query)
816 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
817 break;
818 default:
819 break;
820 }
821}
822
e51060f0
SH		 823static void cma_cancel_listens(struct rdma_id_private *id_priv)
824{
825 struct rdma_id_private *dev_id_priv;
826
d02d1f53
SH		 827 /*
828 * Remove from listen_any_list to prevent added devices from spawning
829 * additional listen requests.
830 */
e51060f0
SH		 831 mutex_lock(&lock);
832 list_del(&id_priv->list);
833
834 while (!list_empty(&id_priv->listen_list)) {
835 dev_id_priv = list_entry(id_priv->listen_list.next,
836 struct rdma_id_private, listen_list);
d02d1f53
SH		 837 /* sync with device removal to avoid duplicate destruction */
838 list_del_init(&dev_id_priv->list);
839 list_del(&dev_id_priv->listen_list);
840 mutex_unlock(&lock);
841
842 rdma_destroy_id(&dev_id_priv->id);
843 mutex_lock(&lock);
e51060f0
SH		 844 }
845 mutex_unlock(&lock);
846}
847
848static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 849 enum rdma_cm_state state)
e51060f0
SH		 850{
851 switch (state) {
550e5ca7 852 case RDMA_CM_ADDR_QUERY:
e51060f0
SH		 853 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
854 break;
550e5ca7 855 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 856 cma_cancel_route(id_priv);
857 break;
550e5ca7 858 case RDMA_CM_LISTEN:
3f446754
RD		 859 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
860 && !id_priv->cma_dev)
e51060f0
SH		 861 cma_cancel_listens(id_priv);
862 break;
863 default:
864 break;
865 }
866}
867
868static void cma_release_port(struct rdma_id_private *id_priv)
869{
870 struct rdma_bind_list *bind_list = id_priv->bind_list;
871
872 if (!bind_list)
873 return;
874
875 mutex_lock(&lock);
876 hlist_del(&id_priv->node);
877 if (hlist_empty(&bind_list->owners)) {
878 idr_remove(bind_list->ps, bind_list->port);
879 kfree(bind_list);
880 }
881 mutex_unlock(&lock);
882}
883
c8f6a362
SH		 884static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
885{
886 struct cma_multicast *mc;
887
888 while (!list_empty(&id_priv->mc_list)) {
889 mc = container_of(id_priv->mc_list.next,
890 struct cma_multicast, list);
891 list_del(&mc->list);
3c86aa70
EC		 892 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
893 case IB_LINK_LAYER_INFINIBAND:
894 ib_sa_free_multicast(mc->multicast.ib);
895 kfree(mc);
896 break;
897 case IB_LINK_LAYER_ETHERNET:
898 kref_put(&mc->mcref, release_mc);
899 break;
900 default:
901 break;
902 }
c8f6a362
SH		 903 }
904}
905
e51060f0
SH		 906void rdma_destroy_id(struct rdma_cm_id *id)
907{
908 struct rdma_id_private *id_priv;
550e5ca7 909 enum rdma_cm_state state;
e51060f0
SH		 910
911 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 912 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 913 cma_cancel_operation(id_priv, state);
914
a396d43a
SH		 915 /*
916 * Wait for any active callback to finish. New callbacks will find
917 * the id_priv state set to destroying and abort.
918 */
919 mutex_lock(&id_priv->handler_mutex);
920 mutex_unlock(&id_priv->handler_mutex);
921
e51060f0 922 if (id_priv->cma_dev) {
3c86aa70 923 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
07ebafba 924 case RDMA_TRANSPORT_IB:
0c9361fc 925 if (id_priv->cm_id.ib)
e51060f0
SH		 926 ib_destroy_cm_id(id_priv->cm_id.ib);
927 break;
07ebafba 928 case RDMA_TRANSPORT_IWARP:
0c9361fc 929 if (id_priv->cm_id.iw)
07ebafba
TT		 930 iw_destroy_cm_id(id_priv->cm_id.iw);
931 break;
e51060f0
SH		 932 default:
933 break;
934 }
c8f6a362 935 cma_leave_mc_groups(id_priv);
a396d43a 936 cma_release_dev(id_priv);
e51060f0
SH		 937 }
938
939 cma_release_port(id_priv);
940 cma_deref_id(id_priv);
941 wait_for_completion(&id_priv->comp);
942
d02d1f53
SH		 943 if (id_priv->internal_id)
944 cma_deref_id(id_priv->id.context);
945
e51060f0
SH		 946 kfree(id_priv->id.route.path_rec);
947 kfree(id_priv);
948}
949EXPORT_SYMBOL(rdma_destroy_id);
950
951static int cma_rep_recv(struct rdma_id_private *id_priv)
952{
953 int ret;
954
5851bb89 955 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 956 if (ret)
957 goto reject;
958
5851bb89 959 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 960 if (ret)
961 goto reject;
962
963 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
964 if (ret)
965 goto reject;
966
967 return 0;
968reject:
c5483388 969 cma_modify_qp_err(id_priv);
e51060f0
SH		 970 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
971 NULL, 0, NULL, 0);
972 return ret;
973}
974
975static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
976{
977 if (id_priv->id.ps == RDMA_PS_SDP &&
978 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
979 SDP_MAJ_VERSION)
980 return -EINVAL;
981
982 return 0;
983}
984
a1b1b61f
SH		 985static void cma_set_rep_event_data(struct rdma_cm_event *event,
986 struct ib_cm_rep_event_param *rep_data,
987 void *private_data)
988{
989 event->param.conn.private_data = private_data;
990 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
991 event->param.conn.responder_resources = rep_data->responder_resources;
992 event->param.conn.initiator_depth = rep_data->initiator_depth;
993 event->param.conn.flow_control = rep_data->flow_control;
994 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
995 event->param.conn.srq = rep_data->srq;
996 event->param.conn.qp_num = rep_data->remote_qpn;
997}
998
e51060f0
SH		 999static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1000{
1001 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 1002 struct rdma_cm_event event;
1003 int ret = 0;
e51060f0 1004
38ca83a5 1005 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1006 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
38ca83a5 1007 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1008 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
8aa08602 1009 return 0;
e51060f0 1010
a1b1b61f 1011 memset(&event, 0, sizeof event);
e51060f0
SH		 1012 switch (ib_event->event) {
1013 case IB_CM_REQ_ERROR:
1014 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1015 event.event = RDMA_CM_EVENT_UNREACHABLE;
1016 event.status = -ETIMEDOUT;
e51060f0
SH		 1017 break;
1018 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 1019 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1020 if (event.status)
1021 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 1022 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 1023 event.status = cma_rep_recv(id_priv);
1024 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1025 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 1026 } else
a1b1b61f
SH		 1027 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1028 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1029 ib_event->private_data);
e51060f0
SH		 1030 break;
1031 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1032 case IB_CM_USER_ESTABLISHED:
1033 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1034 break;
1035 case IB_CM_DREQ_ERROR:
a1b1b61f 1036 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1037 case IB_CM_DREQ_RECEIVED:
1038 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 1039 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1040 RDMA_CM_DISCONNECT))
e51060f0 1041 goto out;
a1b1b61f 1042 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1043 break;
1044 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1045 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1046 break;
e51060f0
SH		 1047 case IB_CM_MRA_RECEIVED:
1048 /* ignore event */
1049 goto out;
1050 case IB_CM_REJ_RECEIVED:
c5483388 1051 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1052 event.status = ib_event->param.rej_rcvd.reason;
1053 event.event = RDMA_CM_EVENT_REJECTED;
1054 event.param.conn.private_data = ib_event->private_data;
1055 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1056 break;
1057 default:
468f2239 1058 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1059 ib_event->event);
1060 goto out;
1061 }
1062
a1b1b61f 1063 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1064 if (ret) {
1065 /* Destroy the CM ID by returning a non-zero value. */
1066 id_priv->cm_id.ib = NULL;
550e5ca7 1067 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1068 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1069 rdma_destroy_id(&id_priv->id);
1070 return ret;
1071 }
1072out:
de910bd9 1073 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1074 return ret;
1075}
1076
628e5f6d
SH		 1077static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1078 struct ib_cm_event *ib_event)
e51060f0
SH		 1079{
1080 struct rdma_id_private *id_priv;
1081 struct rdma_cm_id *id;
1082 struct rdma_route *rt;
1083 union cma_ip_addr *src, *dst;
1b90c137 1084 __be16 port;
e51060f0 1085 u8 ip_ver;
64c5e613 1086 int ret;
e51060f0 1087
3f168d2b
KK		 1088 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1089 &ip_ver, &port, &src, &dst))
0c9361fc 1090 return NULL;
3f168d2b 1091
e51060f0 1092 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1093 listen_id->ps, ib_event->param.req_rcvd.qp_type);
e51060f0 1094 if (IS_ERR(id))
0c9361fc 1095 return NULL;
3f168d2b
KK		 1096
1097 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1098 ip_ver, port, src, dst);
e51060f0
SH		 1099
1100 rt = &id->route;
1101 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1102 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1103 GFP_KERNEL);
e51060f0 1104 if (!rt->path_rec)
0c9361fc 1105 goto err;
e51060f0 1106
e51060f0
SH		 1107 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1108 if (rt->num_paths == 2)
1109 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1110
6f8372b6
SH		 1111 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1112 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1113 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
46ea5061 1114 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
6f8372b6
SH		 1115 } else {
1116 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1117 &rt->addr.dev_addr);
1118 if (ret)
0c9361fc 1119 goto err;
6f8372b6
SH		 1120 }
1121 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0
SH		 1122
1123 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1124 id_priv->state = RDMA_CM_CONNECT;
e51060f0 1125 return id_priv;
3f168d2b 1126
3f168d2b 1127err:
0c9361fc 1128 rdma_destroy_id(id);
e51060f0
SH		 1129 return NULL;
1130}
1131
628e5f6d
SH		 1132static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1133 struct ib_cm_event *ib_event)
1134{
1135 struct rdma_id_private *id_priv;
1136 struct rdma_cm_id *id;
1137 union cma_ip_addr *src, *dst;
1b90c137 1138 __be16 port;
628e5f6d
SH		 1139 u8 ip_ver;
1140 int ret;
1141
1142 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1143 listen_id->ps, IB_QPT_UD);
628e5f6d
SH		 1144 if (IS_ERR(id))
1145 return NULL;
1146
1147
1148 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1149 &ip_ver, &port, &src, &dst))
1150 goto err;
1151
1152 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1153 ip_ver, port, src, dst);
1154
6f8372b6
SH		 1155 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1156 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1157 &id->route.addr.dev_addr);
1158 if (ret)
1159 goto err;
1160 }
628e5f6d
SH		 1161
1162 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1163 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 1164 return id_priv;
1165err:
1166 rdma_destroy_id(id);
1167 return NULL;
1168}
1169
a1b1b61f
SH		 1170static void cma_set_req_event_data(struct rdma_cm_event *event,
1171 struct ib_cm_req_event_param *req_data,
1172 void *private_data, int offset)
1173{
1174 event->param.conn.private_data = private_data + offset;
1175 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1176 event->param.conn.responder_resources = req_data->responder_resources;
1177 event->param.conn.initiator_depth = req_data->initiator_depth;
1178 event->param.conn.flow_control = req_data->flow_control;
1179 event->param.conn.retry_count = req_data->retry_count;
1180 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1181 event->param.conn.srq = req_data->srq;
1182 event->param.conn.qp_num = req_data->remote_qpn;
1183}
1184
9595480c
HS		 1185static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1186{
4dd81e89 1187 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 1188 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1189 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1190 (id->qp_type == IB_QPT_UD)) ||
1191 (!id->qp_type));
1192}
1193
e51060f0
SH		 1194static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1195{
1196 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1197 struct rdma_cm_event event;
e51060f0
SH		 1198 int offset, ret;
1199
1200 listen_id = cm_id->context;
9595480c
HS		 1201 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1202 return -EINVAL;
1203
550e5ca7 1204 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1205 return -ECONNABORTED;
e51060f0 1206
628e5f6d
SH		 1207 memset(&event, 0, sizeof event);
1208 offset = cma_user_data_offset(listen_id->id.ps);
1209 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 1210 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
628e5f6d
SH		 1211 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1212 event.param.ud.private_data = ib_event->private_data + offset;
1213 event.param.ud.private_data_len =
1214 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1215 } else {
1216 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1217 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1218 ib_event->private_data, offset);
1219 }
e51060f0
SH		 1220 if (!conn_id) {
1221 ret = -ENOMEM;
b6cec8aa 1222 goto err1;
e51060f0
SH		 1223 }
1224
de910bd9 1225 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba 1226 ret = cma_acquire_dev(conn_id);
a1a733f6 1227 if (ret)
b6cec8aa 1228 goto err2;
e51060f0
SH		 1229
1230 conn_id->cm_id.ib = cm_id;
1231 cm_id->context = conn_id;
1232 cm_id->cm_handler = cma_ib_handler;
1233
25ae21a1
SH		 1234 /*
1235 * Protect against the user destroying conn_id from another thread
1236 * until we're done accessing it.
1237 */
1238 atomic_inc(&conn_id->refcount);
a1b1b61f 1239 ret = conn_id->id.event_handler(&conn_id->id, &event);
b6cec8aa
SH		 1240 if (ret)
1241 goto err3;
1242
1243 /*
1244 * Acquire mutex to prevent user executing rdma_destroy_id()
1245 * while we're accessing the cm_id.
1246 */
1247 mutex_lock(&lock);
1248 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1249 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1250 mutex_unlock(&lock);
1251 mutex_unlock(&conn_id->handler_mutex);
1252 mutex_unlock(&listen_id->handler_mutex);
25ae21a1 1253 cma_deref_id(conn_id);
b6cec8aa 1254 return 0;
a1a733f6 1255
b6cec8aa
SH		 1256err3:
1257 cma_deref_id(conn_id);
a1a733f6
KK		 1258 /* Destroy the CM ID by returning a non-zero value. */
1259 conn_id->cm_id.ib = NULL;
b6cec8aa 1260err2:
550e5ca7 1261 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1262 mutex_unlock(&conn_id->handler_mutex);
b6cec8aa 1263err1:
de910bd9 1264 mutex_unlock(&listen_id->handler_mutex);
b6cec8aa
SH		 1265 if (conn_id)
1266 rdma_destroy_id(&conn_id->id);
e51060f0
SH		 1267 return ret;
1268}
1269
1270static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1271{
628e5f6d 1272 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1273}
1274
1275static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1276 struct ib_cm_compare_data *compare)
1277{
1278 struct cma_hdr *cma_data, *cma_mask;
1279 struct sdp_hh *sdp_data, *sdp_mask;
1b90c137 1280 __be32 ip4_addr;
e51060f0
SH		 1281 struct in6_addr ip6_addr;
1282
1283 memset(compare, 0, sizeof *compare);
1284 cma_data = (void *) compare->data;
1285 cma_mask = (void *) compare->mask;
1286 sdp_data = (void *) compare->data;
1287 sdp_mask = (void *) compare->mask;
1288
1289 switch (addr->sa_family) {
1290 case AF_INET:
1291 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1292 if (ps == RDMA_PS_SDP) {
1293 sdp_set_ip_ver(sdp_data, 4);
1294 sdp_set_ip_ver(sdp_mask, 0xF);
1295 sdp_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1296 sdp_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1297 } else {
1298 cma_set_ip_ver(cma_data, 4);
1299 cma_set_ip_ver(cma_mask, 0xF);
1300 cma_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1301 cma_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1302 }
1303 break;
1304 case AF_INET6:
1305 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1306 if (ps == RDMA_PS_SDP) {
1307 sdp_set_ip_ver(sdp_data, 6);
1308 sdp_set_ip_ver(sdp_mask, 0xF);
1309 sdp_data->dst_addr.ip6 = ip6_addr;
1310 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1311 sizeof sdp_mask->dst_addr.ip6);
1312 } else {
1313 cma_set_ip_ver(cma_data, 6);
1314 cma_set_ip_ver(cma_mask, 0xF);
1315 cma_data->dst_addr.ip6 = ip6_addr;
1316 memset(&cma_mask->dst_addr.ip6, 0xFF,
1317 sizeof cma_mask->dst_addr.ip6);
1318 }
1319 break;
1320 default:
1321 break;
1322 }
1323}
1324
07ebafba
TT		 1325static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1326{
1327 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1328 struct rdma_cm_event event;
07ebafba
TT		 1329 struct sockaddr_in *sin;
1330 int ret = 0;
1331
550e5ca7 1332 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
be65f086 1333 return 0;
07ebafba 1334
be65f086 1335 memset(&event, 0, sizeof event);
07ebafba
TT		 1336 switch (iw_event->event) {
1337 case IW_CM_EVENT_CLOSE:
a1b1b61f 1338 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1339 break;
1340 case IW_CM_EVENT_CONNECT_REPLY:
1341 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1342 *sin = iw_event->local_addr;
1343 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1344 *sin = iw_event->remote_addr;
881a045f
SW		 1345 switch (iw_event->status) {
1346 case 0:
a1b1b61f 1347 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1348 event.param.conn.initiator_depth = iw_event->ird;
1349 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 1350 break;
1351 case -ECONNRESET:
1352 case -ECONNREFUSED:
1353 event.event = RDMA_CM_EVENT_REJECTED;
1354 break;
1355 case -ETIMEDOUT:
1356 event.event = RDMA_CM_EVENT_UNREACHABLE;
1357 break;
1358 default:
1359 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1360 break;
1361 }
07ebafba
TT		 1362 break;
1363 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1364 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1365 event.param.conn.initiator_depth = iw_event->ird;
1366 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 1367 break;
1368 default:
1369 BUG_ON(1);
1370 }
1371
a1b1b61f
SH		 1372 event.status = iw_event->status;
1373 event.param.conn.private_data = iw_event->private_data;
1374 event.param.conn.private_data_len = iw_event->private_data_len;
1375 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1376 if (ret) {
1377 /* Destroy the CM ID by returning a non-zero value. */
1378 id_priv->cm_id.iw = NULL;
550e5ca7 1379 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1380 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1381 rdma_destroy_id(&id_priv->id);
1382 return ret;
1383 }
1384
de910bd9 1385 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1386 return ret;
1387}
1388
1389static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1390 struct iw_cm_event *iw_event)
1391{
1392 struct rdma_cm_id *new_cm_id;
1393 struct rdma_id_private *listen_id, *conn_id;
1394 struct sockaddr_in *sin;
1395 struct net_device *dev = NULL;
a1b1b61f 1396 struct rdma_cm_event event;
07ebafba 1397 int ret;
8d8293cf 1398 struct ib_device_attr attr;
07ebafba
TT		 1399
1400 listen_id = cm_id->context;
550e5ca7 1401 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1402 return -ECONNABORTED;
07ebafba
TT		 1403
1404 /* Create a new RDMA id for the new IW CM ID */
1405 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1406 listen_id->id.context,
b26f9b99 1407 RDMA_PS_TCP, IB_QPT_RC);
10f32065 1408 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1409 ret = -ENOMEM;
1410 goto out;
1411 }
1412 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1413 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 1414 conn_id->state = RDMA_CM_CONNECT;
07ebafba 1415
1ab35276 1416 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
07ebafba
TT		 1417 if (!dev) {
1418 ret = -EADDRNOTAVAIL;
de910bd9 1419 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1420 rdma_destroy_id(new_cm_id);
1421 goto out;
1422 }
1423 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1424 if (ret) {
de910bd9 1425 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1426 rdma_destroy_id(new_cm_id);
1427 goto out;
1428 }
1429
1430 ret = cma_acquire_dev(conn_id);
1431 if (ret) {
de910bd9 1432 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1433 rdma_destroy_id(new_cm_id);
1434 goto out;
1435 }
1436
1437 conn_id->cm_id.iw = cm_id;
1438 cm_id->context = conn_id;
1439 cm_id->cm_handler = cma_iw_handler;
1440
1441 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1442 *sin = iw_event->local_addr;
1443 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1444 *sin = iw_event->remote_addr;
1445
8d8293cf
SW		 1446 ret = ib_query_device(conn_id->id.device, &attr);
1447 if (ret) {
de910bd9 1448 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1449 rdma_destroy_id(new_cm_id);
1450 goto out;
1451 }
1452
a1b1b61f
SH		 1453 memset(&event, 0, sizeof event);
1454 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1455 event.param.conn.private_data = iw_event->private_data;
1456 event.param.conn.private_data_len = iw_event->private_data_len;
3ebeebc3
KS		 1457 event.param.conn.initiator_depth = iw_event->ird;
1458 event.param.conn.responder_resources = iw_event->ord;
25ae21a1
SH		 1459
1460 /*
1461 * Protect against the user destroying conn_id from another thread
1462 * until we're done accessing it.
1463 */
1464 atomic_inc(&conn_id->refcount);
a1b1b61f 1465 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1466 if (ret) {
1467 /* User wants to destroy the CM ID */
1468 conn_id->cm_id.iw = NULL;
550e5ca7 1469 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1470 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1471 cma_deref_id(conn_id);
07ebafba 1472 rdma_destroy_id(&conn_id->id);
de910bd9 1473 goto out;
07ebafba
TT		 1474 }
1475
de910bd9 1476 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1477 cma_deref_id(conn_id);
de910bd9 1478
07ebafba
TT		 1479out:
1480 if (dev)
1481 dev_put(dev);
de910bd9 1482 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1483 return ret;
1484}
1485
e51060f0
SH		 1486static int cma_ib_listen(struct rdma_id_private *id_priv)
1487{
1488 struct ib_cm_compare_data compare_data;
1489 struct sockaddr *addr;
0c9361fc 1490 struct ib_cm_id *id;
e51060f0
SH		 1491 __be64 svc_id;
1492 int ret;
1493
0c9361fc
JM		 1494 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1495 if (IS_ERR(id))
1496 return PTR_ERR(id);
1497
1498 id_priv->cm_id.ib = id;
e51060f0 1499
3f446754 1500 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
e51060f0
SH		 1501 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1502 if (cma_any_addr(addr))
1503 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1504 else {
1505 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1506 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1507 }
1508
1509 if (ret) {
1510 ib_destroy_cm_id(id_priv->cm_id.ib);
1511 id_priv->cm_id.ib = NULL;
1512 }
1513
1514 return ret;
1515}
1516
07ebafba
TT		 1517static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1518{
1519 int ret;
1520 struct sockaddr_in *sin;
0c9361fc
JM		 1521 struct iw_cm_id *id;
1522
1523 id = iw_create_cm_id(id_priv->id.device,
1524 iw_conn_req_handler,
1525 id_priv);
1526 if (IS_ERR(id))
1527 return PTR_ERR(id);
07ebafba 1528
0c9361fc 1529 id_priv->cm_id.iw = id;
07ebafba
TT		 1530
1531 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1532 id_priv->cm_id.iw->local_addr = *sin;
1533
1534 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1535
1536 if (ret) {
1537 iw_destroy_cm_id(id_priv->cm_id.iw);
1538 id_priv->cm_id.iw = NULL;
1539 }
1540
1541 return ret;
1542}
1543
e51060f0
SH		 1544static int cma_listen_handler(struct rdma_cm_id *id,
1545 struct rdma_cm_event *event)
1546{
1547 struct rdma_id_private *id_priv = id->context;
1548
1549 id->context = id_priv->id.context;
1550 id->event_handler = id_priv->id.event_handler;
1551 return id_priv->id.event_handler(id, event);
1552}
1553
1554static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1555 struct cma_device *cma_dev)
1556{
1557 struct rdma_id_private *dev_id_priv;
1558 struct rdma_cm_id *id;
1559 int ret;
1560
b26f9b99
SH		 1561 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1562 id_priv->id.qp_type);
e51060f0
SH		 1563 if (IS_ERR(id))
1564 return;
1565
1566 dev_id_priv = container_of(id, struct rdma_id_private, id);
1567
550e5ca7 1568 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
e51060f0 1569 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
3f446754 1570 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
e51060f0
SH		 1571
1572 cma_attach_to_dev(dev_id_priv, cma_dev);
1573 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1574 atomic_inc(&id_priv->refcount);
1575 dev_id_priv->internal_id = 1;
e51060f0
SH		 1576
1577 ret = rdma_listen(id, id_priv->backlog);
1578 if (ret)
d02d1f53 1579 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1580 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1581}
1582
1583static void cma_listen_on_all(struct rdma_id_private *id_priv)
1584{
1585 struct cma_device *cma_dev;
1586
1587 mutex_lock(&lock);
1588 list_add_tail(&id_priv->list, &listen_any_list);
1589 list_for_each_entry(cma_dev, &dev_list, list)
1590 cma_listen_on_dev(id_priv, cma_dev);
1591 mutex_unlock(&lock);
1592}
1593
a81c994d
SH		 1594void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1595{
1596 struct rdma_id_private *id_priv;
1597
1598 id_priv = container_of(id, struct rdma_id_private, id);
1599 id_priv->tos = (u8) tos;
1600}
1601EXPORT_SYMBOL(rdma_set_service_type);
1602
e51060f0
SH		 1603static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1604 void *context)
1605{
1606 struct cma_work *work = context;
1607 struct rdma_route *route;
1608
1609 route = &work->id->id.route;
1610
1611 if (!status) {
1612 route->num_paths = 1;
1613 *route->path_rec = *path_rec;
1614 } else {
550e5ca7
NM		 1615 work->old_state = RDMA_CM_ROUTE_QUERY;
1616 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0 1617 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1618 work->event.status = status;
e51060f0
SH		 1619 }
1620
1621 queue_work(cma_wq, &work->work);
1622}
1623
1624static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1625 struct cma_work *work)
1626{
a81c994d 1627 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1628 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1629 ib_sa_comp_mask comp_mask;
1630 struct sockaddr_in6 *sin6;
e51060f0
SH		 1631
1632 memset(&path_rec, 0, sizeof path_rec);
6f8372b6
SH		 1633 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1634 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
a81c994d 1635 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1636 path_rec.numb_path = 1;
962063e6 1637 path_rec.reversible = 1;
3f446754
RD		 1638 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1639 (struct sockaddr *) &addr->dst_addr);
a81c994d
SH		 1640
1641 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1642 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1643 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1644
3f446754 1645 if (addr->src_addr.ss_family == AF_INET) {
a81c994d
SH		 1646 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1647 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1648 } else {
1649 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1650 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1651 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1652 }
e51060f0 1653
c1a0b23b 1654 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1655 id_priv->id.port_num, &path_rec,
1656 comp_mask, timeout_ms,
1657 GFP_KERNEL, cma_query_handler,
1658 work, &id_priv->query);
e51060f0
SH		 1659
1660 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1661}
1662
c4028958 1663static void cma_work_handler(struct work_struct *_work)
e51060f0 1664{
c4028958 1665 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1666 struct rdma_id_private *id_priv = work->id;
1667 int destroy = 0;
1668
de910bd9 1669 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1670 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1671 goto out;
1672
1673 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1674 cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1675 destroy = 1;
1676 }
1677out:
de910bd9 1678 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1679 cma_deref_id(id_priv);
1680 if (destroy)
1681 rdma_destroy_id(&id_priv->id);
1682 kfree(work);
1683}
1684
dd5bdff8
OG		 1685static void cma_ndev_work_handler(struct work_struct *_work)
1686{
1687 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1688 struct rdma_id_private *id_priv = work->id;
1689 int destroy = 0;
1690
1691 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 1692 if (id_priv->state == RDMA_CM_DESTROYING ||
1693 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
dd5bdff8
OG		 1694 goto out;
1695
1696 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1697 cma_exch(id_priv, RDMA_CM_DESTROYING);
dd5bdff8
OG		 1698 destroy = 1;
1699 }
1700
1701out:
1702 mutex_unlock(&id_priv->handler_mutex);
1703 cma_deref_id(id_priv);
1704 if (destroy)
1705 rdma_destroy_id(&id_priv->id);
1706 kfree(work);
1707}
1708
e51060f0
SH		 1709static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1710{
1711 struct rdma_route *route = &id_priv->id.route;
1712 struct cma_work *work;
1713 int ret;
1714
1715 work = kzalloc(sizeof *work, GFP_KERNEL);
1716 if (!work)
1717 return -ENOMEM;
1718
1719 work->id = id_priv;
c4028958 1720 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1721 work->old_state = RDMA_CM_ROUTE_QUERY;
1722 work->new_state = RDMA_CM_ROUTE_RESOLVED;
e51060f0
SH		 1723 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1724
1725 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1726 if (!route->path_rec) {
1727 ret = -ENOMEM;
1728 goto err1;
1729 }
1730
1731 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1732 if (ret)
1733 goto err2;
1734
1735 return 0;
1736err2:
1737 kfree(route->path_rec);
1738 route->path_rec = NULL;
1739err1:
1740 kfree(work);
1741 return ret;
1742}
1743
1744int rdma_set_ib_paths(struct rdma_cm_id *id,
1745 struct ib_sa_path_rec *path_rec, int num_paths)
1746{
1747 struct rdma_id_private *id_priv;
1748 int ret;
1749
1750 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 1751 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1752 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 1753 return -EINVAL;
1754
9893e742
JL		 1755 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1756 GFP_KERNEL);
e51060f0
SH		 1757 if (!id->route.path_rec) {
1758 ret = -ENOMEM;
1759 goto err;
1760 }
1761
ae2d9293 1762 id->route.num_paths = num_paths;
e51060f0
SH		 1763 return 0;
1764err:
550e5ca7 1765 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 1766 return ret;
1767}
1768EXPORT_SYMBOL(rdma_set_ib_paths);
1769
07ebafba
TT		 1770static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1771{
1772 struct cma_work *work;
1773
1774 work = kzalloc(sizeof *work, GFP_KERNEL);
1775 if (!work)
1776 return -ENOMEM;
1777
1778 work->id = id_priv;
c4028958 1779 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1780 work->old_state = RDMA_CM_ROUTE_QUERY;
1781 work->new_state = RDMA_CM_ROUTE_RESOLVED;
07ebafba
TT		 1782 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1783 queue_work(cma_wq, &work->work);
1784 return 0;
1785}
1786
3c86aa70
EC		 1787static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1788{
1789 struct rdma_route *route = &id_priv->id.route;
1790 struct rdma_addr *addr = &route->addr;
1791 struct cma_work *work;
1792 int ret;
1793 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1794 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1795 struct net_device *ndev = NULL;
af7bd463 1796 u16 vid;
3c86aa70
EC		 1797
1798 if (src_addr->sin_family != dst_addr->sin_family)
1799 return -EINVAL;
1800
1801 work = kzalloc(sizeof *work, GFP_KERNEL);
1802 if (!work)
1803 return -ENOMEM;
1804
1805 work->id = id_priv;
1806 INIT_WORK(&work->work, cma_work_handler);
1807
1808 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1809 if (!route->path_rec) {
1810 ret = -ENOMEM;
1811 goto err1;
1812 }
1813
1814 route->num_paths = 1;
1815
3c86aa70
EC		 1816 if (addr->dev_addr.bound_dev_if)
1817 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1818 if (!ndev) {
1819 ret = -ENODEV;
1820 goto err2;
1821 }
1822
af7bd463
EC		 1823 vid = rdma_vlan_dev_vlan_id(ndev);
1824
1825 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1826 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1827
1828 route->path_rec->hop_limit = 1;
1829 route->path_rec->reversible = 1;
1830 route->path_rec->pkey = cpu_to_be16(0xffff);
1831 route->path_rec->mtu_selector = IB_SA_EQ;
366cddb4
AV		 1832 route->path_rec->sl = netdev_get_prio_tc_map(
1833 ndev->priv_flags & IFF_802_1Q_VLAN ?
1834 vlan_dev_real_dev(ndev) : ndev,
1835 rt_tos2priority(id_priv->tos));
af7bd463 1836
3c86aa70
EC		 1837 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1838 route->path_rec->rate_selector = IB_SA_EQ;
1839 route->path_rec->rate = iboe_get_rate(ndev);
1840 dev_put(ndev);
1841 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1842 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1843 if (!route->path_rec->mtu) {
1844 ret = -EINVAL;
1845 goto err2;
1846 }
1847
550e5ca7
NM		 1848 work->old_state = RDMA_CM_ROUTE_QUERY;
1849 work->new_state = RDMA_CM_ROUTE_RESOLVED;
3c86aa70
EC		 1850 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1851 work->event.status = 0;
1852
1853 queue_work(cma_wq, &work->work);
1854
1855 return 0;
1856
1857err2:
1858 kfree(route->path_rec);
1859 route->path_rec = NULL;
1860err1:
1861 kfree(work);
1862 return ret;
1863}
1864
e51060f0
SH		 1865int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1866{
1867 struct rdma_id_private *id_priv;
1868 int ret;
1869
1870 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1871 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 1872 return -EINVAL;
1873
1874 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1875 switch (rdma_node_get_transport(id->device->node_type)) {
1876 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 1877 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1878 case IB_LINK_LAYER_INFINIBAND:
1879 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1880 break;
1881 case IB_LINK_LAYER_ETHERNET:
1882 ret = cma_resolve_iboe_route(id_priv);
1883 break;
1884 default:
1885 ret = -ENOSYS;
1886 }
e51060f0 1887 break;
07ebafba
TT		 1888 case RDMA_TRANSPORT_IWARP:
1889 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1890 break;
e51060f0
SH		 1891 default:
1892 ret = -ENOSYS;
1893 break;
1894 }
1895 if (ret)
1896 goto err;
1897
1898 return 0;
1899err:
550e5ca7 1900 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 1901 cma_deref_id(id_priv);
1902 return ret;
1903}
1904EXPORT_SYMBOL(rdma_resolve_route);
1905
1906static int cma_bind_loopback(struct rdma_id_private *id_priv)
1907{
1908 struct cma_device *cma_dev;
1909 struct ib_port_attr port_attr;
f0ee3404 1910 union ib_gid gid;
e51060f0
SH		 1911 u16 pkey;
1912 int ret;
1913 u8 p;
1914
1915 mutex_lock(&lock);
e82153b5
KK		 1916 if (list_empty(&dev_list)) {
1917 ret = -ENODEV;
1918 goto out;
1919 }
e51060f0
SH		 1920 list_for_each_entry(cma_dev, &dev_list, list)
1921 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1922 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1923 port_attr.state == IB_PORT_ACTIVE)
1924 goto port_found;
1925
e82153b5
KK		 1926 p = 1;
1927 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1928
1929port_found:
f0ee3404 1930 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1931 if (ret)
1932 goto out;
1933
1934 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1935 if (ret)
1936 goto out;
1937
6f8372b6 1938 id_priv->id.route.addr.dev_addr.dev_type =
3c86aa70 1939 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
6f8372b6
SH		 1940 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1941
1942 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1943 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1944 id_priv->id.port_num = p;
1945 cma_attach_to_dev(id_priv, cma_dev);
1946out:
1947 mutex_unlock(&lock);
1948 return ret;
1949}
1950
1951static void addr_handler(int status, struct sockaddr *src_addr,
1952 struct rdma_dev_addr *dev_addr, void *context)
1953{
1954 struct rdma_id_private *id_priv = context;
a1b1b61f 1955 struct rdma_cm_event event;
e51060f0 1956
a1b1b61f 1957 memset(&event, 0, sizeof event);
de910bd9 1958 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 1959 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
1960 RDMA_CM_ADDR_RESOLVED))
61a73c70 1961 goto out;
61a73c70
SH		 1962
1963 if (!status && !id_priv->cma_dev)
e51060f0
SH		 1964 status = cma_acquire_dev(id_priv);
1965
1966 if (status) {
550e5ca7
NM		 1967 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1968 RDMA_CM_ADDR_BOUND))
e51060f0 1969 goto out;
a1b1b61f
SH		 1970 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1971 event.status = status;
e51060f0 1972 } else {
e51060f0
SH		 1973 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1974 ip_addr_size(src_addr));
a1b1b61f 1975 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1976 }
1977
a1b1b61f 1978 if (id_priv->id.event_handler(&id_priv->id, &event)) {
550e5ca7 1979 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1980 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1981 cma_deref_id(id_priv);
1982 rdma_destroy_id(&id_priv->id);
1983 return;
1984 }
1985out:
de910bd9 1986 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1987 cma_deref_id(id_priv);
1988}
1989
1990static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1991{
1992 struct cma_work *work;
6f8372b6 1993 struct sockaddr *src, *dst;
f0ee3404 1994 union ib_gid gid;
e51060f0
SH		 1995 int ret;
1996
1997 work = kzalloc(sizeof *work, GFP_KERNEL);
1998 if (!work)
1999 return -ENOMEM;
2000
2001 if (!id_priv->cma_dev) {
2002 ret = cma_bind_loopback(id_priv);
2003 if (ret)
2004 goto err;
2005 }
2006
6f8372b6
SH		 2007 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2008 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2009
6f8372b6
SH		 2010 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2011 if (cma_zero_addr(src)) {
2012 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2013 if ((src->sa_family = dst->sa_family) == AF_INET) {
4e3fd7a0
AD		 2014 ((struct sockaddr_in *)src)->sin_addr =
2015 ((struct sockaddr_in *)dst)->sin_addr;
6f8372b6 2016 } else {
4e3fd7a0
AD		 2017 ((struct sockaddr_in6 *)src)->sin6_addr =
2018 ((struct sockaddr_in6 *)dst)->sin6_addr;
6f8372b6 2019 }
e51060f0
SH		 2020 }
2021
2022 work->id = id_priv;
c4028958 2023 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2024 work->old_state = RDMA_CM_ADDR_QUERY;
2025 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0
SH		 2026 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2027 queue_work(cma_wq, &work->work);
2028 return 0;
2029err:
2030 kfree(work);
2031 return ret;
2032}
2033
2034static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2035 struct sockaddr *dst_addr)
2036{
d14714df
SH		 2037 if (!src_addr || !src_addr->sa_family) {
2038 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2039 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2040 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2041 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2042 }
2043 }
2044 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2045}
2046
2047int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2048 struct sockaddr *dst_addr, int timeout_ms)
2049{
2050 struct rdma_id_private *id_priv;
2051 int ret;
2052
2053 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2054 if (id_priv->state == RDMA_CM_IDLE) {
e51060f0
SH		 2055 ret = cma_bind_addr(id, src_addr, dst_addr);
2056 if (ret)
2057 return ret;
2058 }
2059
550e5ca7 2060 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
e51060f0
SH		 2061 return -EINVAL;
2062
2063 atomic_inc(&id_priv->refcount);
2064 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2065 if (cma_any_addr(dst_addr))
2066 ret = cma_resolve_loopback(id_priv);
2067 else
3f446754 2068 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 2069 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 2070 timeout_ms, addr_handler, id_priv);
2071 if (ret)
2072 goto err;
2073
2074 return 0;
2075err:
550e5ca7 2076 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 2077 cma_deref_id(id_priv);
2078 return ret;
2079}
2080EXPORT_SYMBOL(rdma_resolve_addr);
2081
a9bb7912
HS		 2082int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2083{
2084 struct rdma_id_private *id_priv;
2085 unsigned long flags;
2086 int ret;
2087
2088 id_priv = container_of(id, struct rdma_id_private, id);
2089 spin_lock_irqsave(&id_priv->lock, flags);
550e5ca7 2090 if (id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 2091 id_priv->reuseaddr = reuse;
2092 ret = 0;
2093 } else {
2094 ret = -EINVAL;
2095 }
2096 spin_unlock_irqrestore(&id_priv->lock, flags);
2097 return ret;
2098}
2099EXPORT_SYMBOL(rdma_set_reuseaddr);
2100
e51060f0
SH		 2101static void cma_bind_port(struct rdma_bind_list *bind_list,
2102 struct rdma_id_private *id_priv)
2103{
2104 struct sockaddr_in *sin;
2105
2106 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2107 sin->sin_port = htons(bind_list->port);
2108 id_priv->bind_list = bind_list;
2109 hlist_add_head(&id_priv->node, &bind_list->owners);
2110}
2111
2112static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2113 unsigned short snum)
2114{
2115 struct rdma_bind_list *bind_list;
aedec080 2116 int port, ret;
e51060f0 2117
cb164b8c 2118 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2119 if (!bind_list)
2120 return -ENOMEM;
2121
aedec080
SH		 2122 do {
2123 ret = idr_get_new_above(ps, bind_list, snum, &port);
2124 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2125
2126 if (ret)
2127 goto err1;
2128
2129 if (port != snum) {
2130 ret = -EADDRNOTAVAIL;
2131 goto err2;
2132 }
2133
2134 bind_list->ps = ps;
2135 bind_list->port = (unsigned short) port;
2136 cma_bind_port(bind_list, id_priv);
2137 return 0;
2138err2:
2139 idr_remove(ps, port);
2140err1:
2141 kfree(bind_list);
2142 return ret;
2143}
e51060f0 2144
aedec080
SH		 2145static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2146{
5d7220e8
TH		 2147 static unsigned int last_used_port;
2148 int low, high, remaining;
2149 unsigned int rover;
e51060f0 2150
227b60f5 2151 inet_get_local_port_range(&low, &high);
5d7220e8
TH		 2152 remaining = (high - low) + 1;
2153 rover = net_random() % remaining + low;
2154retry:
2155 if (last_used_port != rover &&
2156 !idr_find(ps, (unsigned short) rover)) {
2157 int ret = cma_alloc_port(ps, id_priv, rover);
2158 /*
2159 * Remember previously used port number in order to avoid
2160 * re-using same port immediately after it is closed.
2161 */
2162 if (!ret)
2163 last_used_port = rover;
2164 if (ret != -EADDRNOTAVAIL)
2165 return ret;
e51060f0 2166 }
5d7220e8
TH		 2167 if (--remaining) {
2168 rover++;
2169 if ((rover < low) || (rover > high))
2170 rover = low;
2171 goto retry;
2172 }
2173 return -EADDRNOTAVAIL;
e51060f0
SH		 2174}
2175
a9bb7912
HS		 2176/*
2177 * Check that the requested port is available. This is called when trying to
2178 * bind to a specific port, or when trying to listen on a bound port. In
2179 * the latter case, the provided id_priv may already be on the bind_list, but
2180 * we still need to check that it's okay to start listening.
2181 */
2182static int cma_check_port(struct rdma_bind_list *bind_list,
2183 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 2184{
2185 struct rdma_id_private *cur_id;
43b752da 2186 struct sockaddr *addr, *cur_addr;
e51060f0 2187 struct hlist_node *node;
e51060f0 2188
43b752da 2189 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
a9bb7912 2190 if (cma_any_addr(addr) && !reuseaddr)
e51060f0
SH		 2191 return -EADDRNOTAVAIL;
2192
2193 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
a9bb7912
HS		 2194 if (id_priv == cur_id)
2195 continue;
3cd96564 2196
550e5ca7 2197 if ((cur_id->state == RDMA_CM_LISTEN) ||
a9bb7912
HS		 2198 !reuseaddr || !cur_id->reuseaddr) {
2199 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2200 if (cma_any_addr(cur_addr))
2201 return -EADDRNOTAVAIL;
e51060f0 2202
a9bb7912
HS		 2203 if (!cma_addr_cmp(addr, cur_addr))
2204 return -EADDRINUSE;
2205 }
2206 }
e51060f0
SH		 2207 return 0;
2208}
2209
a9bb7912
HS		 2210static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2211{
2212 struct rdma_bind_list *bind_list;
2213 unsigned short snum;
2214 int ret;
2215
2216 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2217 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2218 return -EACCES;
2219
2220 bind_list = idr_find(ps, snum);
2221 if (!bind_list) {
2222 ret = cma_alloc_port(ps, id_priv, snum);
2223 } else {
2224 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2225 if (!ret)
2226 cma_bind_port(bind_list, id_priv);
2227 }
2228 return ret;
2229}
2230
2231static int cma_bind_listen(struct rdma_id_private *id_priv)
2232{
2233 struct rdma_bind_list *bind_list = id_priv->bind_list;
2234 int ret = 0;
2235
2236 mutex_lock(&lock);
2237 if (bind_list->owners.first->next)
2238 ret = cma_check_port(bind_list, id_priv, 0);
2239 mutex_unlock(&lock);
2240 return ret;
2241}
2242
e51060f0
SH		 2243static int cma_get_port(struct rdma_id_private *id_priv)
2244{
2245 struct idr *ps;
2246 int ret;
2247
2248 switch (id_priv->id.ps) {
2249 case RDMA_PS_SDP:
2250 ps = &sdp_ps;
2251 break;
2252 case RDMA_PS_TCP:
2253 ps = &tcp_ps;
2254 break;
628e5f6d
SH		 2255 case RDMA_PS_UDP:
2256 ps = &udp_ps;
2257 break;
c8f6a362
SH		 2258 case RDMA_PS_IPOIB:
2259 ps = &ipoib_ps;
2260 break;
2d2e9415
SH		 2261 case RDMA_PS_IB:
2262 ps = &ib_ps;
2263 break;
e51060f0
SH		 2264 default:
2265 return -EPROTONOSUPPORT;
2266 }
2267
2268 mutex_lock(&lock);
3f446754 2269 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2270 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2271 else
2272 ret = cma_use_port(ps, id_priv);
2273 mutex_unlock(&lock);
2274
2275 return ret;
2276}
2277
d14714df
SH		 2278static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2279 struct sockaddr *addr)
2280{
fd4582a3 2281#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
d14714df
SH		 2282 struct sockaddr_in6 *sin6;
2283
2284 if (addr->sa_family != AF_INET6)
2285 return 0;
2286
2287 sin6 = (struct sockaddr_in6 *) addr;
2288 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2289 !sin6->sin6_scope_id)
2290 return -EINVAL;
2291
2292 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2293#endif
2294 return 0;
2295}
2296
a9bb7912
HS		 2297int rdma_listen(struct rdma_cm_id *id, int backlog)
2298{
2299 struct rdma_id_private *id_priv;
2300 int ret;
2301
2302 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2303 if (id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 2304 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2305 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2306 if (ret)
2307 return ret;
2308 }
2309
550e5ca7 2310 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
a9bb7912
HS		 2311 return -EINVAL;
2312
2313 if (id_priv->reuseaddr) {
2314 ret = cma_bind_listen(id_priv);
2315 if (ret)
2316 goto err;
2317 }
2318
2319 id_priv->backlog = backlog;
2320 if (id->device) {
2321 switch (rdma_node_get_transport(id->device->node_type)) {
2322 case RDMA_TRANSPORT_IB:
2323 ret = cma_ib_listen(id_priv);
2324 if (ret)
2325 goto err;
2326 break;
2327 case RDMA_TRANSPORT_IWARP:
2328 ret = cma_iw_listen(id_priv, backlog);
2329 if (ret)
2330 goto err;
2331 break;
2332 default:
2333 ret = -ENOSYS;
2334 goto err;
2335 }
2336 } else
2337 cma_listen_on_all(id_priv);
2338
2339 return 0;
2340err:
2341 id_priv->backlog = 0;
550e5ca7 2342 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 2343 return ret;
2344}
2345EXPORT_SYMBOL(rdma_listen);
2346
e51060f0
SH		 2347int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2348{
2349 struct rdma_id_private *id_priv;
2350 int ret;
2351
1f5175ad 2352 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
e51060f0
SH		 2353 return -EAFNOSUPPORT;
2354
2355 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2356 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 2357 return -EINVAL;
2358
d14714df
SH		 2359 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2360 if (ret)
2361 goto err1;
2362
8523c048 2363 if (!cma_any_addr(addr)) {
e51060f0 2364 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2365 if (ret)
255d0c14
KK		 2366 goto err1;
2367
255d0c14 2368 ret = cma_acquire_dev(id_priv);
255d0c14
KK		 2369 if (ret)
2370 goto err1;
e51060f0
SH		 2371 }
2372
2373 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2374 ret = cma_get_port(id_priv);
2375 if (ret)
255d0c14 2376 goto err2;
e51060f0
SH		 2377
2378 return 0;
255d0c14 2379err2:
a396d43a
SH		 2380 if (id_priv->cma_dev)
2381 cma_release_dev(id_priv);
255d0c14 2382err1:
550e5ca7 2383 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 2384 return ret;
2385}
2386EXPORT_SYMBOL(rdma_bind_addr);
2387
2388static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2389 struct rdma_route *route)
2390{
e51060f0
SH		 2391 struct cma_hdr *cma_hdr;
2392 struct sdp_hh *sdp_hdr;
2393
1f5175ad
AS		 2394 if (route->addr.src_addr.ss_family == AF_INET) {
2395 struct sockaddr_in *src4, *dst4;
2396
2397 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2398 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2399
2400 switch (ps) {
2401 case RDMA_PS_SDP:
2402 sdp_hdr = hdr;
2403 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2404 return -EINVAL;
2405 sdp_set_ip_ver(sdp_hdr, 4);
2406 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2407 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2408 sdp_hdr->port = src4->sin_port;
2409 break;
2410 default:
2411 cma_hdr = hdr;
2412 cma_hdr->cma_version = CMA_VERSION;
2413 cma_set_ip_ver(cma_hdr, 4);
2414 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2415 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2416 cma_hdr->port = src4->sin_port;
2417 break;
2418 }
2419 } else {
2420 struct sockaddr_in6 *src6, *dst6;
2421
2422 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2423 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2424
2425 switch (ps) {
2426 case RDMA_PS_SDP:
2427 sdp_hdr = hdr;
2428 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2429 return -EINVAL;
2430 sdp_set_ip_ver(sdp_hdr, 6);
2431 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2432 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2433 sdp_hdr->port = src6->sin6_port;
2434 break;
2435 default:
2436 cma_hdr = hdr;
2437 cma_hdr->cma_version = CMA_VERSION;
2438 cma_set_ip_ver(cma_hdr, 6);
2439 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2440 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2441 cma_hdr->port = src6->sin6_port;
2442 break;
2443 }
e51060f0
SH		 2444 }
2445 return 0;
2446}
2447
628e5f6d
SH		 2448static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2449 struct ib_cm_event *ib_event)
2450{
2451 struct rdma_id_private *id_priv = cm_id->context;
2452 struct rdma_cm_event event;
2453 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2454 int ret = 0;
2455
550e5ca7 2456 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
8aa08602 2457 return 0;
628e5f6d 2458
8aa08602 2459 memset(&event, 0, sizeof event);
628e5f6d
SH		 2460 switch (ib_event->event) {
2461 case IB_CM_SIDR_REQ_ERROR:
2462 event.event = RDMA_CM_EVENT_UNREACHABLE;
2463 event.status = -ETIMEDOUT;
2464 break;
2465 case IB_CM_SIDR_REP_RECEIVED:
2466 event.param.ud.private_data = ib_event->private_data;
2467 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2468 if (rep->status != IB_SIDR_SUCCESS) {
2469 event.event = RDMA_CM_EVENT_UNREACHABLE;
2470 event.status = ib_event->param.sidr_rep_rcvd.status;
2471 break;
2472 }
d2ca39f2
YE		 2473 ret = cma_set_qkey(id_priv);
2474 if (ret) {
2475 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2476 event.status = -EINVAL;
2477 break;
2478 }
c8f6a362 2479 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2480 event.event = RDMA_CM_EVENT_UNREACHABLE;
2481 event.status = -EINVAL;
2482 break;
2483 }
2484 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2485 id_priv->id.route.path_rec,
2486 &event.param.ud.ah_attr);
2487 event.param.ud.qp_num = rep->qpn;
2488 event.param.ud.qkey = rep->qkey;
2489 event.event = RDMA_CM_EVENT_ESTABLISHED;
2490 event.status = 0;
2491 break;
2492 default:
468f2239 2493 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2494 ib_event->event);
2495 goto out;
2496 }
2497
2498 ret = id_priv->id.event_handler(&id_priv->id, &event);
2499 if (ret) {
2500 /* Destroy the CM ID by returning a non-zero value. */
2501 id_priv->cm_id.ib = NULL;
550e5ca7 2502 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2503 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2504 rdma_destroy_id(&id_priv->id);
2505 return ret;
2506 }
2507out:
de910bd9 2508 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2509 return ret;
2510}
2511
2512static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2513 struct rdma_conn_param *conn_param)
2514{
2515 struct ib_cm_sidr_req_param req;
2516 struct rdma_route *route;
0c9361fc 2517 struct ib_cm_id *id;
628e5f6d
SH		 2518 int ret;
2519
2520 req.private_data_len = sizeof(struct cma_hdr) +
2521 conn_param->private_data_len;
04ded167
SH		 2522 if (req.private_data_len < conn_param->private_data_len)
2523 return -EINVAL;
2524
628e5f6d
SH		 2525 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2526 if (!req.private_data)
2527 return -ENOMEM;
2528
2529 if (conn_param->private_data && conn_param->private_data_len)
2530 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2531 conn_param->private_data, conn_param->private_data_len);
2532
2533 route = &id_priv->id.route;
2534 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2535 if (ret)
2536 goto out;
2537
0c9361fc
JM		 2538 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2539 id_priv);
2540 if (IS_ERR(id)) {
2541 ret = PTR_ERR(id);
628e5f6d
SH		 2542 goto out;
2543 }
0c9361fc 2544 id_priv->cm_id.ib = id;
628e5f6d
SH		 2545
2546 req.path = route->path_rec;
2547 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2548 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2549 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2550 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2551
2552 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2553 if (ret) {
2554 ib_destroy_cm_id(id_priv->cm_id.ib);
2555 id_priv->cm_id.ib = NULL;
2556 }
2557out:
2558 kfree(req.private_data);
2559 return ret;
2560}
2561
e51060f0
SH		 2562static int cma_connect_ib(struct rdma_id_private *id_priv,
2563 struct rdma_conn_param *conn_param)
2564{
2565 struct ib_cm_req_param req;
2566 struct rdma_route *route;
2567 void *private_data;
0c9361fc 2568 struct ib_cm_id *id;
e51060f0
SH		 2569 int offset, ret;
2570
2571 memset(&req, 0, sizeof req);
2572 offset = cma_user_data_offset(id_priv->id.ps);
2573 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 2574 if (req.private_data_len < conn_param->private_data_len)
2575 return -EINVAL;
2576
e51060f0
SH		 2577 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2578 if (!private_data)
2579 return -ENOMEM;
2580
2581 if (conn_param->private_data && conn_param->private_data_len)
2582 memcpy(private_data + offset, conn_param->private_data,
2583 conn_param->private_data_len);
2584
0c9361fc
JM		 2585 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2586 if (IS_ERR(id)) {
2587 ret = PTR_ERR(id);
e51060f0
SH		 2588 goto out;
2589 }
0c9361fc 2590 id_priv->cm_id.ib = id;
e51060f0
SH		 2591
2592 route = &id_priv->id.route;
2593 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2594 if (ret)
2595 goto out;
2596 req.private_data = private_data;
2597
2598 req.primary_path = &route->path_rec[0];
2599 if (route->num_paths == 2)
2600 req.alternate_path = &route->path_rec[1];
2601
2602 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2603 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2604 req.qp_num = id_priv->qp_num;
18c441a6 2605 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 2606 req.starting_psn = id_priv->seq_num;
2607 req.responder_resources = conn_param->responder_resources;
2608 req.initiator_depth = conn_param->initiator_depth;
2609 req.flow_control = conn_param->flow_control;
2610 req.retry_count = conn_param->retry_count;
2611 req.rnr_retry_count = conn_param->rnr_retry_count;
2612 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2613 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2614 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2615 req.srq = id_priv->srq ? 1 : 0;
2616
2617 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2618out:
0c9361fc
JM		 2619 if (ret && !IS_ERR(id)) {
2620 ib_destroy_cm_id(id);
675a027c
KK		 2621 id_priv->cm_id.ib = NULL;
2622 }
2623
e51060f0
SH		 2624 kfree(private_data);
2625 return ret;
2626}
2627
07ebafba
TT		 2628static int cma_connect_iw(struct rdma_id_private *id_priv,
2629 struct rdma_conn_param *conn_param)
2630{
2631 struct iw_cm_id *cm_id;
2632 struct sockaddr_in* sin;
2633 int ret;
2634 struct iw_cm_conn_param iw_param;
2635
2636 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 2637 if (IS_ERR(cm_id))
2638 return PTR_ERR(cm_id);
07ebafba
TT		 2639
2640 id_priv->cm_id.iw = cm_id;
2641
2642 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2643 cm_id->local_addr = *sin;
2644
2645 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2646 cm_id->remote_addr = *sin;
2647
5851bb89 2648 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2649 if (ret)
2650 goto out;
07ebafba 2651
f45ee80e
HS		 2652 if (conn_param) {
2653 iw_param.ord = conn_param->initiator_depth;
2654 iw_param.ird = conn_param->responder_resources;
2655 iw_param.private_data = conn_param->private_data;
2656 iw_param.private_data_len = conn_param->private_data_len;
2657 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2658 } else {
2659 memset(&iw_param, 0, sizeof iw_param);
07ebafba 2660 iw_param.qpn = id_priv->qp_num;
f45ee80e 2661 }
07ebafba
TT		 2662 ret = iw_cm_connect(cm_id, &iw_param);
2663out:
0c9361fc 2664 if (ret) {
675a027c
KK		 2665 iw_destroy_cm_id(cm_id);
2666 id_priv->cm_id.iw = NULL;
2667 }
07ebafba
TT		 2668 return ret;
2669}
2670
e51060f0
SH		 2671int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2672{
2673 struct rdma_id_private *id_priv;
2674 int ret;
2675
2676 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2677 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
e51060f0
SH		 2678 return -EINVAL;
2679
2680 if (!id->qp) {
2681 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2682 id_priv->srq = conn_param->srq;
2683 }
2684
07ebafba
TT		 2685 switch (rdma_node_get_transport(id->device->node_type)) {
2686 case RDMA_TRANSPORT_IB:
b26f9b99 2687 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 2688 ret = cma_resolve_ib_udp(id_priv, conn_param);
2689 else
2690 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2691 break;
07ebafba
TT		 2692 case RDMA_TRANSPORT_IWARP:
2693 ret = cma_connect_iw(id_priv, conn_param);
2694 break;
e51060f0
SH		 2695 default:
2696 ret = -ENOSYS;
2697 break;
2698 }
2699 if (ret)
2700 goto err;
2701
2702 return 0;
2703err:
550e5ca7 2704 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
e51060f0
SH		 2705 return ret;
2706}
2707EXPORT_SYMBOL(rdma_connect);
2708
2709static int cma_accept_ib(struct rdma_id_private *id_priv,
2710 struct rdma_conn_param *conn_param)
2711{
2712 struct ib_cm_rep_param rep;
5851bb89 2713 int ret;
0fe313b0 2714
5851bb89
SH		 2715 ret = cma_modify_qp_rtr(id_priv, conn_param);
2716 if (ret)
2717 goto out;
0fe313b0 2718
5851bb89
SH		 2719 ret = cma_modify_qp_rts(id_priv, conn_param);
2720 if (ret)
2721 goto out;
e51060f0
SH		 2722
2723 memset(&rep, 0, sizeof rep);
2724 rep.qp_num = id_priv->qp_num;
2725 rep.starting_psn = id_priv->seq_num;
2726 rep.private_data = conn_param->private_data;
2727 rep.private_data_len = conn_param->private_data_len;
2728 rep.responder_resources = conn_param->responder_resources;
2729 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2730 rep.failover_accepted = 0;
2731 rep.flow_control = conn_param->flow_control;
2732 rep.rnr_retry_count = conn_param->rnr_retry_count;
2733 rep.srq = id_priv->srq ? 1 : 0;
2734
0fe313b0
SH		 2735 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2736out:
2737 return ret;
e51060f0
SH		 2738}
2739
07ebafba
TT		 2740static int cma_accept_iw(struct rdma_id_private *id_priv,
2741 struct rdma_conn_param *conn_param)
2742{
2743 struct iw_cm_conn_param iw_param;
2744 int ret;
2745
5851bb89 2746 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2747 if (ret)
2748 return ret;
2749
2750 iw_param.ord = conn_param->initiator_depth;
2751 iw_param.ird = conn_param->responder_resources;
2752 iw_param.private_data = conn_param->private_data;
2753 iw_param.private_data_len = conn_param->private_data_len;
2754 if (id_priv->id.qp) {
2755 iw_param.qpn = id_priv->qp_num;
2756 } else
2757 iw_param.qpn = conn_param->qp_num;
2758
2759 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2760}
2761
628e5f6d
SH		 2762static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2763 enum ib_cm_sidr_status status,
2764 const void *private_data, int private_data_len)
2765{
2766 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2767 int ret;
628e5f6d
SH		 2768
2769 memset(&rep, 0, sizeof rep);
2770 rep.status = status;
2771 if (status == IB_SIDR_SUCCESS) {
d2ca39f2
YE		 2772 ret = cma_set_qkey(id_priv);
2773 if (ret)
2774 return ret;
628e5f6d 2775 rep.qp_num = id_priv->qp_num;
c8f6a362 2776 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2777 }
2778 rep.private_data = private_data;
2779 rep.private_data_len = private_data_len;
2780
2781 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2782}
2783
e51060f0
SH		 2784int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2785{
2786 struct rdma_id_private *id_priv;
2787 int ret;
2788
2789 id_priv = container_of(id, struct rdma_id_private, id);
83e9502d
NM		 2790
2791 id_priv->owner = task_pid_nr(current);
2792
550e5ca7 2793 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
e51060f0
SH		 2794 return -EINVAL;
2795
2796 if (!id->qp && conn_param) {
2797 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2798 id_priv->srq = conn_param->srq;
2799 }
2800
07ebafba
TT		 2801 switch (rdma_node_get_transport(id->device->node_type)) {
2802 case RDMA_TRANSPORT_IB:
f45ee80e
HS		 2803 if (id->qp_type == IB_QPT_UD) {
2804 if (conn_param)
2805 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2806 conn_param->private_data,
2807 conn_param->private_data_len);
2808 else
2809 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2810 NULL, 0);
2811 } else {
2812 if (conn_param)
2813 ret = cma_accept_ib(id_priv, conn_param);
2814 else
2815 ret = cma_rep_recv(id_priv);
2816 }
e51060f0 2817 break;
07ebafba
TT		 2818 case RDMA_TRANSPORT_IWARP:
2819 ret = cma_accept_iw(id_priv, conn_param);
2820 break;
e51060f0
SH		 2821 default:
2822 ret = -ENOSYS;
2823 break;
2824 }
2825
2826 if (ret)
2827 goto reject;
2828
2829 return 0;
2830reject:
c5483388 2831 cma_modify_qp_err(id_priv);
e51060f0
SH		 2832 rdma_reject(id, NULL, 0);
2833 return ret;
2834}
2835EXPORT_SYMBOL(rdma_accept);
2836
0fe313b0
SH		 2837int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2838{
2839 struct rdma_id_private *id_priv;
2840 int ret;
2841
2842 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 2843 if (!id_priv->cm_id.ib)
0fe313b0
SH		 2844 return -EINVAL;
2845
2846 switch (id->device->node_type) {
2847 case RDMA_NODE_IB_CA:
2848 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2849 break;
2850 default:
2851 ret = 0;
2852 break;
2853 }
2854 return ret;
2855}
2856EXPORT_SYMBOL(rdma_notify);
2857
e51060f0
SH		 2858int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2859 u8 private_data_len)
2860{
2861 struct rdma_id_private *id_priv;
2862 int ret;
2863
2864 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 2865 if (!id_priv->cm_id.ib)
e51060f0
SH		 2866 return -EINVAL;
2867
07ebafba
TT		 2868 switch (rdma_node_get_transport(id->device->node_type)) {
2869 case RDMA_TRANSPORT_IB:
b26f9b99 2870 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 2871 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2872 private_data, private_data_len);
2873 else
2874 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2875 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2876 0, private_data, private_data_len);
e51060f0 2877 break;
07ebafba
TT		 2878 case RDMA_TRANSPORT_IWARP:
2879 ret = iw_cm_reject(id_priv->cm_id.iw,
2880 private_data, private_data_len);
2881 break;
e51060f0
SH		 2882 default:
2883 ret = -ENOSYS;
2884 break;
2885 }
2886 return ret;
2887}
2888EXPORT_SYMBOL(rdma_reject);
2889
2890int rdma_disconnect(struct rdma_cm_id *id)
2891{
2892 struct rdma_id_private *id_priv;
2893 int ret;
2894
2895 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 2896 if (!id_priv->cm_id.ib)
e51060f0
SH		 2897 return -EINVAL;
2898
07ebafba
TT		 2899 switch (rdma_node_get_transport(id->device->node_type)) {
2900 case RDMA_TRANSPORT_IB:
c5483388 2901 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2902 if (ret)
2903 goto out;
e51060f0
SH		 2904 /* Initiate or respond to a disconnect. */
2905 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2906 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2907 break;
07ebafba
TT		 2908 case RDMA_TRANSPORT_IWARP:
2909 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2910 break;
e51060f0 2911 default:
07ebafba 2912 ret = -EINVAL;
e51060f0
SH		 2913 break;
2914 }
2915out:
2916 return ret;
2917}
2918EXPORT_SYMBOL(rdma_disconnect);
2919
c8f6a362
SH		 2920static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2921{
2922 struct rdma_id_private *id_priv;
2923 struct cma_multicast *mc = multicast->context;
2924 struct rdma_cm_event event;
2925 int ret;
2926
2927 id_priv = mc->id_priv;
550e5ca7
NM		 2928 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
2929 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
8aa08602 2930 return 0;
c8f6a362 2931
c5483388 2932 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2933 if (!status && id_priv->id.qp)
2934 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
46ea5061 2935 be16_to_cpu(multicast->rec.mlid));
c5483388 2936 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2937
2938 memset(&event, 0, sizeof event);
2939 event.status = status;
2940 event.param.ud.private_data = mc->context;
2941 if (!status) {
2942 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2943 ib_init_ah_from_mcmember(id_priv->id.device,
2944 id_priv->id.port_num, &multicast->rec,
2945 &event.param.ud.ah_attr);
2946 event.param.ud.qp_num = 0xFFFFFF;
2947 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2948 } else
2949 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2950
2951 ret = id_priv->id.event_handler(&id_priv->id, &event);
2952 if (ret) {
550e5ca7 2953 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2954 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2955 rdma_destroy_id(&id_priv->id);
2956 return 0;
2957 }
8aa08602 2958
de910bd9 2959 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2960 return 0;
2961}
2962
2963static void cma_set_mgid(struct rdma_id_private *id_priv,
2964 struct sockaddr *addr, union ib_gid *mgid)
2965{
2966 unsigned char mc_map[MAX_ADDR_LEN];
2967 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2968 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2969 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2970
2971 if (cma_any_addr(addr)) {
2972 memset(mgid, 0, sizeof *mgid);
2973 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 2974 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 2975 0xFF10A01B)) {
2976 /* IPv6 address is an SA assigned MGID. */
2977 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
e2e62697
JG		 2978 } else if ((addr->sa_family == AF_INET6)) {
2979 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2980 if (id_priv->id.ps == RDMA_PS_UDP)
2981 mc_map[7] = 0x01; /* Use RDMA CM signature */
2982 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 2983 } else {
a9e527e3 2984 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 2985 if (id_priv->id.ps == RDMA_PS_UDP)
2986 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 2987 *mgid = *(union ib_gid *) (mc_map + 4);
2988 }
2989}
2990
2991static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2992 struct cma_multicast *mc)
2993{
2994 struct ib_sa_mcmember_rec rec;
2995 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2996 ib_sa_comp_mask comp_mask;
2997 int ret;
2998
2999 ib_addr_get_mgid(dev_addr, &rec.mgid);
3000 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3001 &rec.mgid, &rec);
3002 if (ret)
3003 return ret;
3004
3f446754 3005 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 3006 if (id_priv->id.ps == RDMA_PS_UDP)
3007 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
6f8372b6 3008 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 3009 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3010 rec.join_state = 1;
3011
3012 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3013 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3014 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3015 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3016 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3017
84adeee9
YE		 3018 if (id_priv->id.ps == RDMA_PS_IPOIB)
3019 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3020 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
3021
c8f6a362
SH		 3022 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3023 id_priv->id.port_num, &rec,
3024 comp_mask, GFP_KERNEL,
3025 cma_ib_mc_handler, mc);
3026 if (IS_ERR(mc->multicast.ib))
3027 return PTR_ERR(mc->multicast.ib);
3028
3029 return 0;
3030}
3031
3c86aa70
EC		 3032static void iboe_mcast_work_handler(struct work_struct *work)
3033{
3034 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3035 struct cma_multicast *mc = mw->mc;
3036 struct ib_sa_multicast *m = mc->multicast.ib;
3037
3038 mc->multicast.ib->context = mc;
3039 cma_ib_mc_handler(0, m);
3040 kref_put(&mc->mcref, release_mc);
3041 kfree(mw);
3042}
3043
3044static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3045{
3046 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3047 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3048
3049 if (cma_any_addr(addr)) {
3050 memset(mgid, 0, sizeof *mgid);
3051 } else if (addr->sa_family == AF_INET6) {
3052 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3053 } else {
3054 mgid->raw[0] = 0xff;
3055 mgid->raw[1] = 0x0e;
3056 mgid->raw[2] = 0;
3057 mgid->raw[3] = 0;
3058 mgid->raw[4] = 0;
3059 mgid->raw[5] = 0;
3060 mgid->raw[6] = 0;
3061 mgid->raw[7] = 0;
3062 mgid->raw[8] = 0;
3063 mgid->raw[9] = 0;
3064 mgid->raw[10] = 0xff;
3065 mgid->raw[11] = 0xff;
3066 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3067 }
3068}
3069
3070static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3071 struct cma_multicast *mc)
3072{
3073 struct iboe_mcast_work *work;
3074 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3075 int err;
3076 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3077 struct net_device *ndev = NULL;
3078
3079 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3080 return -EINVAL;
3081
3082 work = kzalloc(sizeof *work, GFP_KERNEL);
3083 if (!work)
3084 return -ENOMEM;
3085
3086 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3087 if (!mc->multicast.ib) {
3088 err = -ENOMEM;
3089 goto out1;
3090 }
3091
3092 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3093
3094 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3095 if (id_priv->id.ps == RDMA_PS_UDP)
3096 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3097
3098 if (dev_addr->bound_dev_if)
3099 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3100 if (!ndev) {
3101 err = -ENODEV;
3102 goto out2;
3103 }
3104 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3105 mc->multicast.ib->rec.hop_limit = 1;
3106 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3107 dev_put(ndev);
3108 if (!mc->multicast.ib->rec.mtu) {
3109 err = -EINVAL;
3110 goto out2;
3111 }
3112 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3113 work->id = id_priv;
3114 work->mc = mc;
3115 INIT_WORK(&work->work, iboe_mcast_work_handler);
3116 kref_get(&mc->mcref);
3117 queue_work(cma_wq, &work->work);
3118
3119 return 0;
3120
3121out2:
3122 kfree(mc->multicast.ib);
3123out1:
3124 kfree(work);
3125 return err;
3126}
3127
c8f6a362
SH		 3128int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3129 void *context)
3130{
3131 struct rdma_id_private *id_priv;
3132 struct cma_multicast *mc;
3133 int ret;
3134
3135 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 3136 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3137 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 3138 return -EINVAL;
3139
3140 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3141 if (!mc)
3142 return -ENOMEM;
3143
3144 memcpy(&mc->addr, addr, ip_addr_size(addr));
3145 mc->context = context;
3146 mc->id_priv = id_priv;
3147
3148 spin_lock(&id_priv->lock);
3149 list_add(&mc->list, &id_priv->mc_list);
3150 spin_unlock(&id_priv->lock);
3151
3152 switch (rdma_node_get_transport(id->device->node_type)) {
3153 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 3154 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3155 case IB_LINK_LAYER_INFINIBAND:
3156 ret = cma_join_ib_multicast(id_priv, mc);
3157 break;
3158 case IB_LINK_LAYER_ETHERNET:
3159 kref_init(&mc->mcref);
3160 ret = cma_iboe_join_multicast(id_priv, mc);
3161 break;
3162 default:
3163 ret = -EINVAL;
3164 }
c8f6a362
SH		 3165 break;
3166 default:
3167 ret = -ENOSYS;
3168 break;
3169 }
3170
3171 if (ret) {
3172 spin_lock_irq(&id_priv->lock);
3173 list_del(&mc->list);
3174 spin_unlock_irq(&id_priv->lock);
3175 kfree(mc);
3176 }
3177 return ret;
3178}
3179EXPORT_SYMBOL(rdma_join_multicast);
3180
3181void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3182{
3183 struct rdma_id_private *id_priv;
3184 struct cma_multicast *mc;
3185
3186 id_priv = container_of(id, struct rdma_id_private, id);
3187 spin_lock_irq(&id_priv->lock);
3188 list_for_each_entry(mc, &id_priv->mc_list, list) {
3189 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3190 list_del(&mc->list);
3191 spin_unlock_irq(&id_priv->lock);
3192
3193 if (id->qp)
3194 ib_detach_mcast(id->qp,
3195 &mc->multicast.ib->rec.mgid,
46ea5061 3196 be16_to_cpu(mc->multicast.ib->rec.mlid));
3c86aa70
EC		 3197 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3198 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3199 case IB_LINK_LAYER_INFINIBAND:
3200 ib_sa_free_multicast(mc->multicast.ib);
3201 kfree(mc);
3202 break;
3203 case IB_LINK_LAYER_ETHERNET:
3204 kref_put(&mc->mcref, release_mc);
3205 break;
3206 default:
3207 break;
3208 }
3209 }
c8f6a362
SH		 3210 return;
3211 }
3212 }
3213 spin_unlock_irq(&id_priv->lock);
3214}
3215EXPORT_SYMBOL(rdma_leave_multicast);
3216
dd5bdff8
OG		 3217static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3218{
3219 struct rdma_dev_addr *dev_addr;
3220 struct cma_ndev_work *work;
3221
3222 dev_addr = &id_priv->id.route.addr.dev_addr;
3223
6266ed6e 3224 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 3225 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3226 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3227 ndev->name, &id_priv->id);
3228 work = kzalloc(sizeof *work, GFP_KERNEL);
3229 if (!work)
3230 return -ENOMEM;
3231
3232 INIT_WORK(&work->work, cma_ndev_work_handler);
3233 work->id = id_priv;
3234 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3235 atomic_inc(&id_priv->refcount);
3236 queue_work(cma_wq, &work->work);
3237 }
3238
3239 return 0;
3240}
3241
3242static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3243 void *ctx)
3244{
3245 struct net_device *ndev = (struct net_device *)ctx;
3246 struct cma_device *cma_dev;
3247 struct rdma_id_private *id_priv;
3248 int ret = NOTIFY_DONE;
3249
3250 if (dev_net(ndev) != &init_net)
3251 return NOTIFY_DONE;
3252
3253 if (event != NETDEV_BONDING_FAILOVER)
3254 return NOTIFY_DONE;
3255
3256 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3257 return NOTIFY_DONE;
3258
3259 mutex_lock(&lock);
3260 list_for_each_entry(cma_dev, &dev_list, list)
3261 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3262 ret = cma_netdev_change(ndev, id_priv);
3263 if (ret)
3264 goto out;
3265 }
3266
3267out:
3268 mutex_unlock(&lock);
3269 return ret;
3270}
3271
3272static struct notifier_block cma_nb = {
3273 .notifier_call = cma_netdev_callback
3274};
3275
e51060f0
SH		 3276static void cma_add_one(struct ib_device *device)
3277{
3278 struct cma_device *cma_dev;
3279 struct rdma_id_private *id_priv;
3280
3281 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3282 if (!cma_dev)
3283 return;
3284
3285 cma_dev->device = device;
e51060f0
SH		 3286
3287 init_completion(&cma_dev->comp);
3288 atomic_set(&cma_dev->refcount, 1);
3289 INIT_LIST_HEAD(&cma_dev->id_list);
3290 ib_set_client_data(device, &cma_client, cma_dev);
3291
3292 mutex_lock(&lock);
3293 list_add_tail(&cma_dev->list, &dev_list);
3294 list_for_each_entry(id_priv, &listen_any_list, list)
3295 cma_listen_on_dev(id_priv, cma_dev);
3296 mutex_unlock(&lock);
e51060f0
SH		 3297}
3298
3299static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3300{
a1b1b61f 3301 struct rdma_cm_event event;
550e5ca7 3302 enum rdma_cm_state state;
de910bd9 3303 int ret = 0;
e51060f0
SH		 3304
3305 /* Record that we want to remove the device */
550e5ca7
NM		 3306 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3307 if (state == RDMA_CM_DESTROYING)
e51060f0
SH		 3308 return 0;
3309
3310 cma_cancel_operation(id_priv, state);
de910bd9 3311 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 3312
3313 /* Check for destruction from another callback. */
550e5ca7 3314 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
de910bd9 3315 goto out;
e51060f0 3316
a1b1b61f
SH		 3317 memset(&event, 0, sizeof event);
3318 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 3319 ret = id_priv->id.event_handler(&id_priv->id, &event);
3320out:
3321 mutex_unlock(&id_priv->handler_mutex);
3322 return ret;
e51060f0
SH		 3323}
3324
3325static void cma_process_remove(struct cma_device *cma_dev)
3326{
e51060f0
SH		 3327 struct rdma_id_private *id_priv;
3328 int ret;
3329
e51060f0
SH		 3330 mutex_lock(&lock);
3331 while (!list_empty(&cma_dev->id_list)) {
3332 id_priv = list_entry(cma_dev->id_list.next,
3333 struct rdma_id_private, list);
3334
d02d1f53 3335 list_del(&id_priv->listen_list);
94de178a 3336 list_del_init(&id_priv->list);
e51060f0
SH		 3337 atomic_inc(&id_priv->refcount);
3338 mutex_unlock(&lock);
3339
d02d1f53 3340 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 3341 cma_deref_id(id_priv);
3342 if (ret)
3343 rdma_destroy_id(&id_priv->id);
3344
3345 mutex_lock(&lock);
3346 }
3347 mutex_unlock(&lock);
3348
3349 cma_deref_dev(cma_dev);
3350 wait_for_completion(&cma_dev->comp);
3351}
3352
3353static void cma_remove_one(struct ib_device *device)
3354{
3355 struct cma_device *cma_dev;
3356
3357 cma_dev = ib_get_client_data(device, &cma_client);
3358 if (!cma_dev)
3359 return;
3360
3361 mutex_lock(&lock);
3362 list_del(&cma_dev->list);
3363 mutex_unlock(&lock);
3364
3365 cma_process_remove(cma_dev);
3366 kfree(cma_dev);
3367}
3368
753f618a
NM		 3369static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3370{
3371 struct nlmsghdr *nlh;
3372 struct rdma_cm_id_stats *id_stats;
3373 struct rdma_id_private *id_priv;
3374 struct rdma_cm_id *id = NULL;
3375 struct cma_device *cma_dev;
3376 int i_dev = 0, i_id = 0;
3377
3378 /*
3379 * We export all of the IDs as a sequence of messages. Each
3380 * ID gets its own netlink message.
3381 */
3382 mutex_lock(&lock);
3383
3384 list_for_each_entry(cma_dev, &dev_list, list) {
3385 if (i_dev < cb->args[0]) {
3386 i_dev++;
3387 continue;
3388 }
3389
3390 i_id = 0;
3391 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3392 if (i_id < cb->args[1]) {
3393 i_id++;
3394 continue;
3395 }
3396
3397 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3398 sizeof *id_stats, RDMA_NL_RDMA_CM,
3399 RDMA_NL_RDMA_CM_ID_STATS);
3400 if (!id_stats)
3401 goto out;
3402
3403 memset(id_stats, 0, sizeof *id_stats);
3404 id = &id_priv->id;
3405 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3406 id_stats->port_num = id->port_num;
3407 id_stats->bound_dev_if =
3408 id->route.addr.dev_addr.bound_dev_if;
3409
3410 if (id->route.addr.src_addr.ss_family == AF_INET) {
3411 if (ibnl_put_attr(skb, nlh,
3412 sizeof(struct sockaddr_in),
3413 &id->route.addr.src_addr,
3414 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3415 goto out;
3416 }
3417 if (ibnl_put_attr(skb, nlh,
3418 sizeof(struct sockaddr_in),
3419 &id->route.addr.dst_addr,
3420 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3421 goto out;
3422 }
3423 } else if (id->route.addr.src_addr.ss_family == AF_INET6) {
3424 if (ibnl_put_attr(skb, nlh,
3425 sizeof(struct sockaddr_in6),
3426 &id->route.addr.src_addr,
3427 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3428 goto out;
3429 }
3430 if (ibnl_put_attr(skb, nlh,
3431 sizeof(struct sockaddr_in6),
3432 &id->route.addr.dst_addr,
3433 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3434 goto out;
3435 }
3436 }
3437
83e9502d 3438 id_stats->pid = id_priv->owner;
753f618a
NM		 3439 id_stats->port_space = id->ps;
3440 id_stats->cm_state = id_priv->state;
3441 id_stats->qp_num = id_priv->qp_num;
3442 id_stats->qp_type = id->qp_type;
3443
3444 i_id++;
3445 }
3446
3447 cb->args[1] = 0;
3448 i_dev++;
3449 }
3450
3451out:
3452 mutex_unlock(&lock);
3453 cb->args[0] = i_dev;
3454 cb->args[1] = i_id;
3455
3456 return skb->len;
3457}
3458
3459static const struct ibnl_client_cbs cma_cb_table[] = {
3460 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats },
3461};
3462
716abb1f 3463static int __init cma_init(void)
e51060f0 3464{
5d7220e8 3465 int ret;
227b60f5 3466
c7f743a6 3467 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 3468 if (!cma_wq)
3469 return -ENOMEM;
3470
c1a0b23b 3471 ib_sa_register_client(&sa_client);
7a118df3 3472 rdma_addr_register_client(&addr_client);
dd5bdff8 3473 register_netdevice_notifier(&cma_nb);
c1a0b23b 3474
e51060f0
SH		 3475 ret = ib_register_client(&cma_client);
3476 if (ret)
3477 goto err;
753f618a
NM		 3478
3479 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3480 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3481
e51060f0
SH		 3482 return 0;
3483
3484err:
dd5bdff8 3485 unregister_netdevice_notifier(&cma_nb);
7a118df3 3486 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3487 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3488 destroy_workqueue(cma_wq);
3489 return ret;
3490}
3491
716abb1f 3492static void __exit cma_cleanup(void)
e51060f0 3493{
753f618a 3494 ibnl_remove_client(RDMA_NL_RDMA_CM);
e51060f0 3495 ib_unregister_client(&cma_client);
dd5bdff8 3496 unregister_netdevice_notifier(&cma_nb);
7a118df3 3497 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3498 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3499 destroy_workqueue(cma_wq);
3500 idr_destroy(&sdp_ps);
3501 idr_destroy(&tcp_ps);
628e5f6d 3502 idr_destroy(&udp_ps);
c8f6a362 3503 idr_destroy(&ipoib_ps);
2d2e9415 3504 idr_destroy(&ib_ps);
e51060f0
SH		 3505}
3506
3507module_init(cma_init);
3508module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)