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Merge tag 'v3.10.107' into update
[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
68602120
SH		 102enum {
103 CMA_OPTION_AFONLY,
104};
105
e51060f0
SH		 106/*
107 * Device removal can occur at anytime, so we need extra handling to
108 * serialize notifying the user of device removal with other callbacks.
109 * We do this by disabling removal notification while a callback is in process,
110 * and reporting it after the callback completes.
111 */
112struct rdma_id_private {
113 struct rdma_cm_id id;
114
115 struct rdma_bind_list *bind_list;
116 struct hlist_node node;
d02d1f53
SH		 117 struct list_head list; /* listen_any_list or cma_device.list */
118 struct list_head listen_list; /* per device listens */
e51060f0 119 struct cma_device *cma_dev;
c8f6a362 120 struct list_head mc_list;
e51060f0 121
d02d1f53 122 int internal_id;
550e5ca7 123 enum rdma_cm_state state;
e51060f0 124 spinlock_t lock;
c5483388
SH		 125 struct mutex qp_mutex;
126
e51060f0
SH		 127 struct completion comp;
128 atomic_t refcount;
de910bd9 129 struct mutex handler_mutex;
e51060f0
SH		 130
131 int backlog;
132 int timeout_ms;
133 struct ib_sa_query *query;
134 int query_id;
135 union {
136 struct ib_cm_id *ib;
07ebafba 137 struct iw_cm_id *iw;
e51060f0
SH		 138 } cm_id;
139
140 u32 seq_num;
c8f6a362 141 u32 qkey;
e51060f0 142 u32 qp_num;
83e9502d 143 pid_t owner;
68602120 144 u32 options;
e51060f0 145 u8 srq;
a81c994d 146 u8 tos;
a9bb7912 147 u8 reuseaddr;
5b0ec991 148 u8 afonly;
e51060f0
SH		 149};
150
c8f6a362
SH		 151struct cma_multicast {
152 struct rdma_id_private *id_priv;
153 union {
154 struct ib_sa_multicast *ib;
155 } multicast;
156 struct list_head list;
157 void *context;
3f446754 158 struct sockaddr_storage addr;
3c86aa70 159 struct kref mcref;
c8f6a362
SH		 160};
161
e51060f0
SH		 162struct cma_work {
163 struct work_struct work;
164 struct rdma_id_private *id;
550e5ca7
NM		 165 enum rdma_cm_state old_state;
166 enum rdma_cm_state new_state;
e51060f0
SH		 167 struct rdma_cm_event event;
168};
169
dd5bdff8
OG		 170struct cma_ndev_work {
171 struct work_struct work;
172 struct rdma_id_private *id;
173 struct rdma_cm_event event;
174};
175
3c86aa70
EC		 176struct iboe_mcast_work {
177 struct work_struct work;
178 struct rdma_id_private *id;
179 struct cma_multicast *mc;
180};
181
e51060f0
SH		 182union cma_ip_addr {
183 struct in6_addr ip6;
184 struct {
1b90c137
AV		 185 __be32 pad[3];
186 __be32 addr;
e51060f0
SH		 187 } ip4;
188};
189
190struct cma_hdr {
191 u8 cma_version;
192 u8 ip_version; /* IP version: 7:4 */
1b90c137 193 __be16 port;
e51060f0
SH		 194 union cma_ip_addr src_addr;
195 union cma_ip_addr dst_addr;
196};
197
198struct sdp_hh {
199 u8 bsdh[16];
200 u8 sdp_version; /* Major version: 7:4 */
201 u8 ip_version; /* IP version: 7:4 */
202 u8 sdp_specific1[10];
1b90c137
AV		 203 __be16 port;
204 __be16 sdp_specific2;
e51060f0
SH		 205 union cma_ip_addr src_addr;
206 union cma_ip_addr dst_addr;
207};
208
209struct sdp_hah {
210 u8 bsdh[16];
211 u8 sdp_version;
212};
213
214#define CMA_VERSION 0x00
215#define SDP_MAJ_VERSION 0x2
216
550e5ca7 217static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
e51060f0
SH		 218{
219 unsigned long flags;
220 int ret;
221
222 spin_lock_irqsave(&id_priv->lock, flags);
223 ret = (id_priv->state == comp);
224 spin_unlock_irqrestore(&id_priv->lock, flags);
225 return ret;
226}
227
228static int cma_comp_exch(struct rdma_id_private *id_priv,
550e5ca7 229 enum rdma_cm_state comp, enum rdma_cm_state exch)
e51060f0
SH		 230{
231 unsigned long flags;
232 int ret;
233
234 spin_lock_irqsave(&id_priv->lock, flags);
235 if ((ret = (id_priv->state == comp)))
236 id_priv->state = exch;
237 spin_unlock_irqrestore(&id_priv->lock, flags);
238 return ret;
239}
240
550e5ca7
NM		 241static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
242 enum rdma_cm_state exch)
e51060f0
SH		 243{
244 unsigned long flags;
550e5ca7 245 enum rdma_cm_state old;
e51060f0
SH		 246
247 spin_lock_irqsave(&id_priv->lock, flags);
248 old = id_priv->state;
249 id_priv->state = exch;
250 spin_unlock_irqrestore(&id_priv->lock, flags);
251 return old;
252}
253
254static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
255{
256 return hdr->ip_version >> 4;
257}
258
259static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
260{
261 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
262}
263
264static inline u8 sdp_get_majv(u8 sdp_version)
265{
266 return sdp_version >> 4;
267}
268
269static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
270{
271 return hh->ip_version >> 4;
272}
273
274static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
275{
276 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
277}
278
279static void cma_attach_to_dev(struct rdma_id_private *id_priv,
280 struct cma_device *cma_dev)
281{
282 atomic_inc(&cma_dev->refcount);
283 id_priv->cma_dev = cma_dev;
284 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 285 id_priv->id.route.addr.dev_addr.transport =
286 rdma_node_get_transport(cma_dev->device->node_type);
e51060f0
SH		 287 list_add_tail(&id_priv->list, &cma_dev->id_list);
288}
289
290static inline void cma_deref_dev(struct cma_device *cma_dev)
291{
292 if (atomic_dec_and_test(&cma_dev->refcount))
293 complete(&cma_dev->comp);
294}
295
3c86aa70
EC		 296static inline void release_mc(struct kref *kref)
297{
298 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
299
300 kfree(mc->multicast.ib);
301 kfree(mc);
302}
303
a396d43a 304static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 305{
a396d43a 306 mutex_lock(&lock);
e51060f0
SH		 307 list_del(&id_priv->list);
308 cma_deref_dev(id_priv->cma_dev);
309 id_priv->cma_dev = NULL;
a396d43a 310 mutex_unlock(&lock);
e51060f0
SH		 311}
312
d2ca39f2 313static int cma_set_qkey(struct rdma_id_private *id_priv)
c8f6a362
SH		 314{
315 struct ib_sa_mcmember_rec rec;
316 int ret = 0;
317
d2ca39f2
YE		 318 if (id_priv->qkey)
319 return 0;
320
321 switch (id_priv->id.ps) {
c8f6a362 322 case RDMA_PS_UDP:
d2ca39f2 323 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 324 break;
325 case RDMA_PS_IPOIB:
d2ca39f2
YE		 326 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
327 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
328 id_priv->id.port_num, &rec.mgid,
329 &rec);
330 if (!ret)
331 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 332 break;
333 default:
334 break;
335 }
336 return ret;
337}
338
3c86aa70
EC		 339static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
340{
341 int i;
342 int err;
343 struct ib_port_attr props;
344 union ib_gid tmp;
345
346 err = ib_query_port(device, port_num, &props);
347 if (err)
63f05be2 348 return err;
3c86aa70
EC		 349
350 for (i = 0; i < props.gid_tbl_len; ++i) {
351 err = ib_query_gid(device, port_num, i, &tmp);
352 if (err)
63f05be2 353 return err;
3c86aa70
EC		 354 if (!memcmp(&tmp, gid, sizeof tmp))
355 return 0;
356 }
357
63f05be2 358 return -EADDRNOTAVAIL;
3c86aa70
EC		 359}
360
07ebafba 361static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 362{
c8f6a362 363 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 364 struct cma_device *cma_dev;
3c86aa70 365 union ib_gid gid, iboe_gid;
e51060f0 366 int ret = -ENODEV;
3c86aa70
EC		 367 u8 port;
368 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
369 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
e51060f0 370
2efdd6a0
MS		 371 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
372 id_priv->id.ps == RDMA_PS_IPOIB)
373 return -EINVAL;
374
a396d43a 375 mutex_lock(&lock);
3c86aa70
EC		 376 iboe_addr_get_sgid(dev_addr, &iboe_gid);
377 memcpy(&gid, dev_addr->src_dev_addr +
378 rdma_addr_gid_offset(dev_addr), sizeof gid);
e51060f0 379 list_for_each_entry(cma_dev, &dev_list, list) {
3c86aa70
EC		 380 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
381 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
382 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
383 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
384 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
385 else
386 ret = find_gid_port(cma_dev->device, &gid, port);
387
388 if (!ret) {
389 id_priv->id.port_num = port;
390 goto out;
63f05be2 391 }
3c86aa70 392 }
e51060f0
SH		 393 }
394 }
3c86aa70
EC		 395
396out:
397 if (!ret)
398 cma_attach_to_dev(id_priv, cma_dev);
399
a396d43a 400 mutex_unlock(&lock);
e51060f0
SH		 401 return ret;
402}
403
e51060f0
SH		 404static void cma_deref_id(struct rdma_id_private *id_priv)
405{
406 if (atomic_dec_and_test(&id_priv->refcount))
407 complete(&id_priv->comp);
408}
409
de910bd9 410static int cma_disable_callback(struct rdma_id_private *id_priv,
550e5ca7 411 enum rdma_cm_state state)
8aa08602 412{
de910bd9
OG		 413 mutex_lock(&id_priv->handler_mutex);
414 if (id_priv->state != state) {
415 mutex_unlock(&id_priv->handler_mutex);
416 return -EINVAL;
417 }
418 return 0;
e51060f0
SH		 419}
420
421struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
b26f9b99
SH		 422 void *context, enum rdma_port_space ps,
423 enum ib_qp_type qp_type)
e51060f0
SH		 424{
425 struct rdma_id_private *id_priv;
426
427 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
428 if (!id_priv)
429 return ERR_PTR(-ENOMEM);
430
83e9502d 431 id_priv->owner = task_pid_nr(current);
550e5ca7 432 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 433 id_priv->id.context = context;
434 id_priv->id.event_handler = event_handler;
435 id_priv->id.ps = ps;
b26f9b99 436 id_priv->id.qp_type = qp_type;
e51060f0 437 spin_lock_init(&id_priv->lock);
c5483388 438 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 439 init_completion(&id_priv->comp);
440 atomic_set(&id_priv->refcount, 1);
de910bd9 441 mutex_init(&id_priv->handler_mutex);
e51060f0 442 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 443 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 444 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
445
446 return &id_priv->id;
447}
448EXPORT_SYMBOL(rdma_create_id);
449
c8f6a362 450static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 451{
452 struct ib_qp_attr qp_attr;
c8f6a362 453 int qp_attr_mask, ret;
e51060f0 454
c8f6a362
SH		 455 qp_attr.qp_state = IB_QPS_INIT;
456 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 457 if (ret)
458 return ret;
459
c8f6a362
SH		 460 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
461 if (ret)
462 return ret;
463
464 qp_attr.qp_state = IB_QPS_RTR;
465 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
466 if (ret)
467 return ret;
468
469 qp_attr.qp_state = IB_QPS_RTS;
470 qp_attr.sq_psn = 0;
471 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
472
473 return ret;
e51060f0
SH		 474}
475
c8f6a362 476static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 477{
478 struct ib_qp_attr qp_attr;
c8f6a362 479 int qp_attr_mask, ret;
07ebafba
TT		 480
481 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 482 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
483 if (ret)
484 return ret;
07ebafba 485
c8f6a362 486 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 487}
488
e51060f0
SH		 489int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
490 struct ib_qp_init_attr *qp_init_attr)
491{
492 struct rdma_id_private *id_priv;
493 struct ib_qp *qp;
494 int ret;
495
496 id_priv = container_of(id, struct rdma_id_private, id);
497 if (id->device != pd->device)
498 return -EINVAL;
499
500 qp = ib_create_qp(pd, qp_init_attr);
501 if (IS_ERR(qp))
502 return PTR_ERR(qp);
503
b26f9b99 504 if (id->qp_type == IB_QPT_UD)
c8f6a362
SH		 505 ret = cma_init_ud_qp(id_priv, qp);
506 else
507 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 508 if (ret)
509 goto err;
510
511 id->qp = qp;
512 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 513 id_priv->srq = (qp->srq != NULL);
514 return 0;
515err:
516 ib_destroy_qp(qp);
517 return ret;
518}
519EXPORT_SYMBOL(rdma_create_qp);
520
521void rdma_destroy_qp(struct rdma_cm_id *id)
522{
c5483388
SH		 523 struct rdma_id_private *id_priv;
524
525 id_priv = container_of(id, struct rdma_id_private, id);
526 mutex_lock(&id_priv->qp_mutex);
527 ib_destroy_qp(id_priv->id.qp);
528 id_priv->id.qp = NULL;
529 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 530}
531EXPORT_SYMBOL(rdma_destroy_qp);
532
5851bb89
SH		 533static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
534 struct rdma_conn_param *conn_param)
e51060f0
SH		 535{
536 struct ib_qp_attr qp_attr;
537 int qp_attr_mask, ret;
538
c5483388
SH		 539 mutex_lock(&id_priv->qp_mutex);
540 if (!id_priv->id.qp) {
541 ret = 0;
542 goto out;
543 }
e51060f0
SH		 544
545 /* Need to update QP attributes from default values. */
546 qp_attr.qp_state = IB_QPS_INIT;
c5483388 547 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 548 if (ret)
c5483388 549 goto out;
e51060f0 550
c5483388 551 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 552 if (ret)
c5483388 553 goto out;
e51060f0
SH		 554
555 qp_attr.qp_state = IB_QPS_RTR;
c5483388 556 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 557 if (ret)
c5483388 558 goto out;
e51060f0 559
5851bb89
SH		 560 if (conn_param)
561 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 562 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
563out:
564 mutex_unlock(&id_priv->qp_mutex);
565 return ret;
e51060f0
SH		 566}
567
5851bb89
SH		 568static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
569 struct rdma_conn_param *conn_param)
e51060f0
SH		 570{
571 struct ib_qp_attr qp_attr;
572 int qp_attr_mask, ret;
573
c5483388
SH		 574 mutex_lock(&id_priv->qp_mutex);
575 if (!id_priv->id.qp) {
576 ret = 0;
577 goto out;
578 }
e51060f0
SH		 579
580 qp_attr.qp_state = IB_QPS_RTS;
c5483388 581 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 582 if (ret)
c5483388 583 goto out;
e51060f0 584
5851bb89
SH		 585 if (conn_param)
586 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 587 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
588out:
589 mutex_unlock(&id_priv->qp_mutex);
590 return ret;
e51060f0
SH		 591}
592
c5483388 593static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 594{
595 struct ib_qp_attr qp_attr;
c5483388 596 int ret;
e51060f0 597
c5483388
SH		 598 mutex_lock(&id_priv->qp_mutex);
599 if (!id_priv->id.qp) {
600 ret = 0;
601 goto out;
602 }
e51060f0
SH		 603
604 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 605 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
606out:
607 mutex_unlock(&id_priv->qp_mutex);
608 return ret;
e51060f0
SH		 609}
610
c8f6a362
SH		 611static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
612 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
613{
614 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
615 int ret;
3c86aa70
EC		 616 u16 pkey;
617
618 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
619 IB_LINK_LAYER_INFINIBAND)
620 pkey = ib_addr_get_pkey(dev_addr);
621 else
622 pkey = 0xffff;
c8f6a362
SH		 623
624 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 625 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 626 if (ret)
627 return ret;
628
629 qp_attr->port_num = id_priv->id.port_num;
630 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
631
b26f9b99 632 if (id_priv->id.qp_type == IB_QPT_UD) {
d2ca39f2
YE		 633 ret = cma_set_qkey(id_priv);
634 if (ret)
635 return ret;
636
c8f6a362
SH		 637 qp_attr->qkey = id_priv->qkey;
638 *qp_attr_mask |= IB_QP_QKEY;
639 } else {
640 qp_attr->qp_access_flags = 0;
641 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
642 }
643 return 0;
644}
645
e51060f0
SH		 646int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
647 int *qp_attr_mask)
648{
649 struct rdma_id_private *id_priv;
c8f6a362 650 int ret = 0;
e51060f0
SH		 651
652 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 653 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
654 case RDMA_TRANSPORT_IB:
b26f9b99 655 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 656 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
657 else
658 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
659 qp_attr_mask);
e51060f0
SH		 660 if (qp_attr->qp_state == IB_QPS_RTR)
661 qp_attr->rq_psn = id_priv->seq_num;
662 break;
07ebafba 663 case RDMA_TRANSPORT_IWARP:
c8f6a362 664 if (!id_priv->cm_id.iw) {
8f076531 665 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 666 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
667 } else
668 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
669 qp_attr_mask);
07ebafba 670 break;
e51060f0
SH		 671 default:
672 ret = -ENOSYS;
673 break;
674 }
675
676 return ret;
677}
678EXPORT_SYMBOL(rdma_init_qp_attr);
679
680static inline int cma_zero_addr(struct sockaddr *addr)
681{
682 struct in6_addr *ip6;
683
684 if (addr->sa_family == AF_INET)
6360a02a
JP		 685 return ipv4_is_zeronet(
686 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
e51060f0
SH		 687 else {
688 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
689 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 690 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 691 }
692}
693
694static inline int cma_loopback_addr(struct sockaddr *addr)
695{
1f5175ad
AS		 696 if (addr->sa_family == AF_INET)
697 return ipv4_is_loopback(
698 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
699 else
700 return ipv6_addr_loopback(
701 &((struct sockaddr_in6 *) addr)->sin6_addr);
e51060f0
SH		 702}
703
704static inline int cma_any_addr(struct sockaddr *addr)
705{
706 return cma_zero_addr(addr) || cma_loopback_addr(addr);
707}
708
43b752da
HS		 709static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
710{
711 if (src->sa_family != dst->sa_family)
712 return -1;
713
714 switch (src->sa_family) {
715 case AF_INET:
716 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
717 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
718 default:
719 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
720 &((struct sockaddr_in6 *) dst)->sin6_addr);
721 }
722}
723
628e5f6d
SH		 724static inline __be16 cma_port(struct sockaddr *addr)
725{
726 if (addr->sa_family == AF_INET)
727 return ((struct sockaddr_in *) addr)->sin_port;
728 else
729 return ((struct sockaddr_in6 *) addr)->sin6_port;
730}
731
e51060f0
SH		 732static inline int cma_any_port(struct sockaddr *addr)
733{
628e5f6d 734 return !cma_port(addr);
e51060f0
SH		 735}
736
737static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
1b90c137 738 u8 *ip_ver, __be16 *port,
e51060f0
SH		 739 union cma_ip_addr **src, union cma_ip_addr **dst)
740{
741 switch (ps) {
742 case RDMA_PS_SDP:
743 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
744 SDP_MAJ_VERSION)
745 return -EINVAL;
746
747 *ip_ver = sdp_get_ip_ver(hdr);
748 *port = ((struct sdp_hh *) hdr)->port;
749 *src = &((struct sdp_hh *) hdr)->src_addr;
750 *dst = &((struct sdp_hh *) hdr)->dst_addr;
751 break;
752 default:
753 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
754 return -EINVAL;
755
756 *ip_ver = cma_get_ip_ver(hdr);
757 *port = ((struct cma_hdr *) hdr)->port;
758 *src = &((struct cma_hdr *) hdr)->src_addr;
759 *dst = &((struct cma_hdr *) hdr)->dst_addr;
760 break;
761 }
762
763 if (*ip_ver != 4 && *ip_ver != 6)
764 return -EINVAL;
765 return 0;
766}
767
768static void cma_save_net_info(struct rdma_addr *addr,
769 struct rdma_addr *listen_addr,
1b90c137 770 u8 ip_ver, __be16 port,
e51060f0
SH		 771 union cma_ip_addr *src, union cma_ip_addr *dst)
772{
773 struct sockaddr_in *listen4, *ip4;
774 struct sockaddr_in6 *listen6, *ip6;
775
776 switch (ip_ver) {
777 case 4:
778 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
779 ip4 = (struct sockaddr_in *) &addr->src_addr;
780 ip4->sin_family = listen4->sin_family;
781 ip4->sin_addr.s_addr = dst->ip4.addr;
782 ip4->sin_port = listen4->sin_port;
783
784 ip4 = (struct sockaddr_in *) &addr->dst_addr;
785 ip4->sin_family = listen4->sin_family;
786 ip4->sin_addr.s_addr = src->ip4.addr;
787 ip4->sin_port = port;
788 break;
789 case 6:
790 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
791 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
792 ip6->sin6_family = listen6->sin6_family;
793 ip6->sin6_addr = dst->ip6;
794 ip6->sin6_port = listen6->sin6_port;
795
796 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
797 ip6->sin6_family = listen6->sin6_family;
798 ip6->sin6_addr = src->ip6;
799 ip6->sin6_port = port;
800 break;
801 default:
802 break;
803 }
804}
805
806static inline int cma_user_data_offset(enum rdma_port_space ps)
807{
808 switch (ps) {
809 case RDMA_PS_SDP:
810 return 0;
811 default:
812 return sizeof(struct cma_hdr);
813 }
814}
815
e51060f0
SH		 816static void cma_cancel_route(struct rdma_id_private *id_priv)
817{
3c86aa70
EC		 818 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
819 case IB_LINK_LAYER_INFINIBAND:
e51060f0
SH		 820 if (id_priv->query)
821 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
822 break;
823 default:
824 break;
825 }
826}
827
e51060f0
SH		 828static void cma_cancel_listens(struct rdma_id_private *id_priv)
829{
830 struct rdma_id_private *dev_id_priv;
831
d02d1f53
SH		 832 /*
833 * Remove from listen_any_list to prevent added devices from spawning
834 * additional listen requests.
835 */
e51060f0
SH		 836 mutex_lock(&lock);
837 list_del(&id_priv->list);
838
839 while (!list_empty(&id_priv->listen_list)) {
840 dev_id_priv = list_entry(id_priv->listen_list.next,
841 struct rdma_id_private, listen_list);
d02d1f53
SH		 842 /* sync with device removal to avoid duplicate destruction */
843 list_del_init(&dev_id_priv->list);
844 list_del(&dev_id_priv->listen_list);
845 mutex_unlock(&lock);
846
847 rdma_destroy_id(&dev_id_priv->id);
848 mutex_lock(&lock);
e51060f0
SH		 849 }
850 mutex_unlock(&lock);
851}
852
853static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 854 enum rdma_cm_state state)
e51060f0
SH		 855{
856 switch (state) {
550e5ca7 857 case RDMA_CM_ADDR_QUERY:
e51060f0
SH		 858 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
859 break;
550e5ca7 860 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 861 cma_cancel_route(id_priv);
862 break;
550e5ca7 863 case RDMA_CM_LISTEN:
3f446754
RD		 864 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
865 && !id_priv->cma_dev)
e51060f0
SH		 866 cma_cancel_listens(id_priv);
867 break;
868 default:
869 break;
870 }
871}
872
873static void cma_release_port(struct rdma_id_private *id_priv)
874{
875 struct rdma_bind_list *bind_list = id_priv->bind_list;
876
877 if (!bind_list)
878 return;
879
880 mutex_lock(&lock);
881 hlist_del(&id_priv->node);
882 if (hlist_empty(&bind_list->owners)) {
883 idr_remove(bind_list->ps, bind_list->port);
884 kfree(bind_list);
885 }
886 mutex_unlock(&lock);
887}
888
c8f6a362
SH		 889static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
890{
891 struct cma_multicast *mc;
892
893 while (!list_empty(&id_priv->mc_list)) {
894 mc = container_of(id_priv->mc_list.next,
895 struct cma_multicast, list);
896 list_del(&mc->list);
3c86aa70
EC		 897 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
898 case IB_LINK_LAYER_INFINIBAND:
899 ib_sa_free_multicast(mc->multicast.ib);
900 kfree(mc);
901 break;
902 case IB_LINK_LAYER_ETHERNET:
903 kref_put(&mc->mcref, release_mc);
904 break;
905 default:
906 break;
907 }
c8f6a362
SH		 908 }
909}
910
e51060f0
SH		 911void rdma_destroy_id(struct rdma_cm_id *id)
912{
913 struct rdma_id_private *id_priv;
550e5ca7 914 enum rdma_cm_state state;
e51060f0
SH		 915
916 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 917 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 918 cma_cancel_operation(id_priv, state);
919
a396d43a
SH		 920 /*
921 * Wait for any active callback to finish. New callbacks will find
922 * the id_priv state set to destroying and abort.
923 */
924 mutex_lock(&id_priv->handler_mutex);
925 mutex_unlock(&id_priv->handler_mutex);
926
e51060f0 927 if (id_priv->cma_dev) {
3c86aa70 928 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
07ebafba 929 case RDMA_TRANSPORT_IB:
0c9361fc 930 if (id_priv->cm_id.ib)
e51060f0
SH		 931 ib_destroy_cm_id(id_priv->cm_id.ib);
932 break;
07ebafba 933 case RDMA_TRANSPORT_IWARP:
0c9361fc 934 if (id_priv->cm_id.iw)
07ebafba
TT		 935 iw_destroy_cm_id(id_priv->cm_id.iw);
936 break;
e51060f0
SH		 937 default:
938 break;
939 }
c8f6a362 940 cma_leave_mc_groups(id_priv);
a396d43a 941 cma_release_dev(id_priv);
e51060f0
SH		 942 }
943
944 cma_release_port(id_priv);
945 cma_deref_id(id_priv);
946 wait_for_completion(&id_priv->comp);
947
d02d1f53
SH		 948 if (id_priv->internal_id)
949 cma_deref_id(id_priv->id.context);
950
e51060f0
SH		 951 kfree(id_priv->id.route.path_rec);
952 kfree(id_priv);
953}
954EXPORT_SYMBOL(rdma_destroy_id);
955
956static int cma_rep_recv(struct rdma_id_private *id_priv)
957{
958 int ret;
959
5851bb89 960 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 961 if (ret)
962 goto reject;
963
5851bb89 964 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 965 if (ret)
966 goto reject;
967
968 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
969 if (ret)
970 goto reject;
971
972 return 0;
973reject:
c5483388 974 cma_modify_qp_err(id_priv);
e51060f0
SH		 975 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
976 NULL, 0, NULL, 0);
977 return ret;
978}
979
980static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
981{
982 if (id_priv->id.ps == RDMA_PS_SDP &&
983 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
984 SDP_MAJ_VERSION)
985 return -EINVAL;
986
987 return 0;
988}
989
a1b1b61f
SH		 990static void cma_set_rep_event_data(struct rdma_cm_event *event,
991 struct ib_cm_rep_event_param *rep_data,
992 void *private_data)
993{
994 event->param.conn.private_data = private_data;
995 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
996 event->param.conn.responder_resources = rep_data->responder_resources;
997 event->param.conn.initiator_depth = rep_data->initiator_depth;
998 event->param.conn.flow_control = rep_data->flow_control;
999 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1000 event->param.conn.srq = rep_data->srq;
1001 event->param.conn.qp_num = rep_data->remote_qpn;
1002}
1003
e51060f0
SH		 1004static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1005{
1006 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 1007 struct rdma_cm_event event;
1008 int ret = 0;
e51060f0 1009
38ca83a5 1010 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1011 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
38ca83a5 1012 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
550e5ca7 1013 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
8aa08602 1014 return 0;
e51060f0 1015
a1b1b61f 1016 memset(&event, 0, sizeof event);
e51060f0
SH		 1017 switch (ib_event->event) {
1018 case IB_CM_REQ_ERROR:
1019 case IB_CM_REP_ERROR:
a1b1b61f
SH		 1020 event.event = RDMA_CM_EVENT_UNREACHABLE;
1021 event.status = -ETIMEDOUT;
e51060f0
SH		 1022 break;
1023 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 1024 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1025 if (event.status)
1026 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 1027 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 1028 event.status = cma_rep_recv(id_priv);
1029 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1030 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 1031 } else
a1b1b61f
SH		 1032 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1033 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1034 ib_event->private_data);
e51060f0
SH		 1035 break;
1036 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 1037 case IB_CM_USER_ESTABLISHED:
1038 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 1039 break;
1040 case IB_CM_DREQ_ERROR:
a1b1b61f 1041 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 1042 case IB_CM_DREQ_RECEIVED:
1043 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 1044 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1045 RDMA_CM_DISCONNECT))
e51060f0 1046 goto out;
a1b1b61f 1047 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 1048 break;
1049 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 1050 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1051 break;
e51060f0
SH		 1052 case IB_CM_MRA_RECEIVED:
1053 /* ignore event */
1054 goto out;
1055 case IB_CM_REJ_RECEIVED:
c5483388 1056 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 1057 event.status = ib_event->param.rej_rcvd.reason;
1058 event.event = RDMA_CM_EVENT_REJECTED;
1059 event.param.conn.private_data = ib_event->private_data;
1060 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 1061 break;
1062 default:
468f2239 1063 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 1064 ib_event->event);
1065 goto out;
1066 }
1067
a1b1b61f 1068 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 1069 if (ret) {
1070 /* Destroy the CM ID by returning a non-zero value. */
1071 id_priv->cm_id.ib = NULL;
550e5ca7 1072 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1073 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1074 rdma_destroy_id(&id_priv->id);
1075 return ret;
1076 }
1077out:
de910bd9 1078 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1079 return ret;
1080}
1081
628e5f6d
SH		 1082static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1083 struct ib_cm_event *ib_event)
e51060f0
SH		 1084{
1085 struct rdma_id_private *id_priv;
1086 struct rdma_cm_id *id;
1087 struct rdma_route *rt;
1088 union cma_ip_addr *src, *dst;
1b90c137 1089 __be16 port;
e51060f0 1090 u8 ip_ver;
64c5e613 1091 int ret;
e51060f0 1092
3f168d2b
KK		 1093 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1094 &ip_ver, &port, &src, &dst))
0c9361fc 1095 return NULL;
3f168d2b 1096
e51060f0 1097 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1098 listen_id->ps, ib_event->param.req_rcvd.qp_type);
e51060f0 1099 if (IS_ERR(id))
0c9361fc 1100 return NULL;
3f168d2b
KK		 1101
1102 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1103 ip_ver, port, src, dst);
e51060f0
SH		 1104
1105 rt = &id->route;
1106 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1107 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1108 GFP_KERNEL);
e51060f0 1109 if (!rt->path_rec)
0c9361fc 1110 goto err;
e51060f0 1111
e51060f0
SH		 1112 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1113 if (rt->num_paths == 2)
1114 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1115
6f8372b6
SH		 1116 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1117 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1118 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
46ea5061 1119 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
6f8372b6
SH		 1120 } else {
1121 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1122 &rt->addr.dev_addr);
1123 if (ret)
0c9361fc 1124 goto err;
6f8372b6
SH		 1125 }
1126 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0
SH		 1127
1128 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1129 id_priv->state = RDMA_CM_CONNECT;
e51060f0 1130 return id_priv;
3f168d2b 1131
3f168d2b 1132err:
0c9361fc 1133 rdma_destroy_id(id);
e51060f0
SH		 1134 return NULL;
1135}
1136
628e5f6d
SH		 1137static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1138 struct ib_cm_event *ib_event)
1139{
1140 struct rdma_id_private *id_priv;
1141 struct rdma_cm_id *id;
1142 union cma_ip_addr *src, *dst;
1b90c137 1143 __be16 port;
628e5f6d
SH		 1144 u8 ip_ver;
1145 int ret;
1146
1147 id = rdma_create_id(listen_id->event_handler, listen_id->context,
b26f9b99 1148 listen_id->ps, IB_QPT_UD);
628e5f6d
SH		 1149 if (IS_ERR(id))
1150 return NULL;
1151
1152
1153 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1154 &ip_ver, &port, &src, &dst))
1155 goto err;
1156
1157 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1158 ip_ver, port, src, dst);
1159
6f8372b6
SH		 1160 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1161 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1162 &id->route.addr.dev_addr);
1163 if (ret)
1164 goto err;
1165 }
628e5f6d
SH		 1166
1167 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1168 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 1169 return id_priv;
1170err:
1171 rdma_destroy_id(id);
1172 return NULL;
1173}
1174
a1b1b61f
SH		 1175static void cma_set_req_event_data(struct rdma_cm_event *event,
1176 struct ib_cm_req_event_param *req_data,
1177 void *private_data, int offset)
1178{
1179 event->param.conn.private_data = private_data + offset;
1180 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1181 event->param.conn.responder_resources = req_data->responder_resources;
1182 event->param.conn.initiator_depth = req_data->initiator_depth;
1183 event->param.conn.flow_control = req_data->flow_control;
1184 event->param.conn.retry_count = req_data->retry_count;
1185 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1186 event->param.conn.srq = req_data->srq;
1187 event->param.conn.qp_num = req_data->remote_qpn;
1188}
1189
9595480c
HS		 1190static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1191{
4dd81e89 1192 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 1193 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1194 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1195 (id->qp_type == IB_QPT_UD)) ||
1196 (!id->qp_type));
1197}
1198
e51060f0
SH		 1199static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1200{
1201 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1202 struct rdma_cm_event event;
e51060f0
SH		 1203 int offset, ret;
1204
1205 listen_id = cm_id->context;
9595480c
HS		 1206 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1207 return -EINVAL;
1208
550e5ca7 1209 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1210 return -ECONNABORTED;
e51060f0 1211
628e5f6d
SH		 1212 memset(&event, 0, sizeof event);
1213 offset = cma_user_data_offset(listen_id->id.ps);
1214 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 1215 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
628e5f6d
SH		 1216 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1217 event.param.ud.private_data = ib_event->private_data + offset;
1218 event.param.ud.private_data_len =
1219 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1220 } else {
1221 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1222 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1223 ib_event->private_data, offset);
1224 }
e51060f0
SH		 1225 if (!conn_id) {
1226 ret = -ENOMEM;
b6cec8aa 1227 goto err1;
e51060f0
SH		 1228 }
1229
de910bd9 1230 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
07ebafba 1231 ret = cma_acquire_dev(conn_id);
a1a733f6 1232 if (ret)
b6cec8aa 1233 goto err2;
e51060f0
SH		 1234
1235 conn_id->cm_id.ib = cm_id;
1236 cm_id->context = conn_id;
1237 cm_id->cm_handler = cma_ib_handler;
1238
25ae21a1
SH		 1239 /*
1240 * Protect against the user destroying conn_id from another thread
1241 * until we're done accessing it.
1242 */
1243 atomic_inc(&conn_id->refcount);
a1b1b61f 1244 ret = conn_id->id.event_handler(&conn_id->id, &event);
b6cec8aa
SH		 1245 if (ret)
1246 goto err3;
1247
1248 /*
1249 * Acquire mutex to prevent user executing rdma_destroy_id()
1250 * while we're accessing the cm_id.
1251 */
1252 mutex_lock(&lock);
1253 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1254 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1255 mutex_unlock(&lock);
1256 mutex_unlock(&conn_id->handler_mutex);
1257 mutex_unlock(&listen_id->handler_mutex);
25ae21a1 1258 cma_deref_id(conn_id);
b6cec8aa 1259 return 0;
a1a733f6 1260
b6cec8aa
SH		 1261err3:
1262 cma_deref_id(conn_id);
a1a733f6
KK		 1263 /* Destroy the CM ID by returning a non-zero value. */
1264 conn_id->cm_id.ib = NULL;
b6cec8aa 1265err2:
550e5ca7 1266 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1267 mutex_unlock(&conn_id->handler_mutex);
b6cec8aa 1268err1:
de910bd9 1269 mutex_unlock(&listen_id->handler_mutex);
b6cec8aa
SH		 1270 if (conn_id)
1271 rdma_destroy_id(&conn_id->id);
e51060f0
SH		 1272 return ret;
1273}
1274
1275static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1276{
628e5f6d 1277 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1278}
1279
1280static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1281 struct ib_cm_compare_data *compare)
1282{
1283 struct cma_hdr *cma_data, *cma_mask;
1284 struct sdp_hh *sdp_data, *sdp_mask;
1b90c137 1285 __be32 ip4_addr;
e51060f0
SH		 1286 struct in6_addr ip6_addr;
1287
1288 memset(compare, 0, sizeof *compare);
1289 cma_data = (void *) compare->data;
1290 cma_mask = (void *) compare->mask;
1291 sdp_data = (void *) compare->data;
1292 sdp_mask = (void *) compare->mask;
1293
1294 switch (addr->sa_family) {
1295 case AF_INET:
1296 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1297 if (ps == RDMA_PS_SDP) {
1298 sdp_set_ip_ver(sdp_data, 4);
1299 sdp_set_ip_ver(sdp_mask, 0xF);
1300 sdp_data->dst_addr.ip4.addr = ip4_addr;
1b90c137 1301 sdp_mask->dst_addr.ip4.addr = htonl(~0);
e51060f0
SH		 1302 } else {
1303 cma_set_ip_ver(cma_data, 4);
1304 cma_set_ip_ver(cma_mask, 0xF);
406b6a25
SH		 1305 if (!cma_any_addr(addr)) {
1306 cma_data->dst_addr.ip4.addr = ip4_addr;
1307 cma_mask->dst_addr.ip4.addr = htonl(~0);
1308 }
e51060f0
SH		 1309 }
1310 break;
1311 case AF_INET6:
1312 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1313 if (ps == RDMA_PS_SDP) {
1314 sdp_set_ip_ver(sdp_data, 6);
1315 sdp_set_ip_ver(sdp_mask, 0xF);
1316 sdp_data->dst_addr.ip6 = ip6_addr;
1317 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1318 sizeof sdp_mask->dst_addr.ip6);
1319 } else {
1320 cma_set_ip_ver(cma_data, 6);
1321 cma_set_ip_ver(cma_mask, 0xF);
406b6a25
SH		 1322 if (!cma_any_addr(addr)) {
1323 cma_data->dst_addr.ip6 = ip6_addr;
1324 memset(&cma_mask->dst_addr.ip6, 0xFF,
1325 sizeof cma_mask->dst_addr.ip6);
1326 }
e51060f0
SH		 1327 }
1328 break;
1329 default:
1330 break;
1331 }
1332}
1333
07ebafba
TT		 1334static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1335{
1336 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1337 struct rdma_cm_event event;
07ebafba
TT		 1338 struct sockaddr_in *sin;
1339 int ret = 0;
1340
550e5ca7 1341 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
be65f086 1342 return 0;
07ebafba 1343
be65f086 1344 memset(&event, 0, sizeof event);
07ebafba
TT		 1345 switch (iw_event->event) {
1346 case IW_CM_EVENT_CLOSE:
a1b1b61f 1347 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1348 break;
1349 case IW_CM_EVENT_CONNECT_REPLY:
1350 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1351 *sin = iw_event->local_addr;
1352 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1353 *sin = iw_event->remote_addr;
881a045f
SW		 1354 switch (iw_event->status) {
1355 case 0:
a1b1b61f 1356 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1357 event.param.conn.initiator_depth = iw_event->ird;
1358 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 1359 break;
1360 case -ECONNRESET:
1361 case -ECONNREFUSED:
1362 event.event = RDMA_CM_EVENT_REJECTED;
1363 break;
1364 case -ETIMEDOUT:
1365 event.event = RDMA_CM_EVENT_UNREACHABLE;
1366 break;
1367 default:
1368 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1369 break;
1370 }
07ebafba
TT		 1371 break;
1372 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1373 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 1374 event.param.conn.initiator_depth = iw_event->ird;
1375 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 1376 break;
1377 default:
1378 BUG_ON(1);
1379 }
1380
a1b1b61f
SH		 1381 event.status = iw_event->status;
1382 event.param.conn.private_data = iw_event->private_data;
1383 event.param.conn.private_data_len = iw_event->private_data_len;
1384 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1385 if (ret) {
1386 /* Destroy the CM ID by returning a non-zero value. */
1387 id_priv->cm_id.iw = NULL;
550e5ca7 1388 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1389 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1390 rdma_destroy_id(&id_priv->id);
1391 return ret;
1392 }
1393
de910bd9 1394 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 1395 return ret;
1396}
1397
1398static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1399 struct iw_cm_event *iw_event)
1400{
1401 struct rdma_cm_id *new_cm_id;
1402 struct rdma_id_private *listen_id, *conn_id;
1403 struct sockaddr_in *sin;
1404 struct net_device *dev = NULL;
a1b1b61f 1405 struct rdma_cm_event event;
07ebafba 1406 int ret;
8d8293cf 1407 struct ib_device_attr attr;
07ebafba
TT		 1408
1409 listen_id = cm_id->context;
550e5ca7 1410 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
8aa08602 1411 return -ECONNABORTED;
07ebafba
TT		 1412
1413 /* Create a new RDMA id for the new IW CM ID */
1414 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1415 listen_id->id.context,
b26f9b99 1416 RDMA_PS_TCP, IB_QPT_RC);
10f32065 1417 if (IS_ERR(new_cm_id)) {
07ebafba
TT		 1418 ret = -ENOMEM;
1419 goto out;
1420 }
1421 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
de910bd9 1422 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 1423 conn_id->state = RDMA_CM_CONNECT;
07ebafba 1424
1ab35276 1425 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
07ebafba
TT		 1426 if (!dev) {
1427 ret = -EADDRNOTAVAIL;
de910bd9 1428 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1429 rdma_destroy_id(new_cm_id);
1430 goto out;
1431 }
1432 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1433 if (ret) {
de910bd9 1434 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1435 rdma_destroy_id(new_cm_id);
1436 goto out;
1437 }
1438
1439 ret = cma_acquire_dev(conn_id);
1440 if (ret) {
de910bd9 1441 mutex_unlock(&conn_id->handler_mutex);
07ebafba
TT		 1442 rdma_destroy_id(new_cm_id);
1443 goto out;
1444 }
1445
1446 conn_id->cm_id.iw = cm_id;
1447 cm_id->context = conn_id;
1448 cm_id->cm_handler = cma_iw_handler;
1449
1450 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1451 *sin = iw_event->local_addr;
1452 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1453 *sin = iw_event->remote_addr;
1454
8d8293cf
SW		 1455 ret = ib_query_device(conn_id->id.device, &attr);
1456 if (ret) {
de910bd9 1457 mutex_unlock(&conn_id->handler_mutex);
8d8293cf
SW		 1458 rdma_destroy_id(new_cm_id);
1459 goto out;
1460 }
1461
a1b1b61f
SH		 1462 memset(&event, 0, sizeof event);
1463 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1464 event.param.conn.private_data = iw_event->private_data;
1465 event.param.conn.private_data_len = iw_event->private_data_len;
3ebeebc3
KS		 1466 event.param.conn.initiator_depth = iw_event->ird;
1467 event.param.conn.responder_resources = iw_event->ord;
25ae21a1
SH		 1468
1469 /*
1470 * Protect against the user destroying conn_id from another thread
1471 * until we're done accessing it.
1472 */
1473 atomic_inc(&conn_id->refcount);
a1b1b61f 1474 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1475 if (ret) {
1476 /* User wants to destroy the CM ID */
1477 conn_id->cm_id.iw = NULL;
550e5ca7 1478 cma_exch(conn_id, RDMA_CM_DESTROYING);
de910bd9 1479 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1480 cma_deref_id(conn_id);
07ebafba 1481 rdma_destroy_id(&conn_id->id);
de910bd9 1482 goto out;
07ebafba
TT		 1483 }
1484
de910bd9 1485 mutex_unlock(&conn_id->handler_mutex);
25ae21a1 1486 cma_deref_id(conn_id);
de910bd9 1487
07ebafba
TT		 1488out:
1489 if (dev)
1490 dev_put(dev);
de910bd9 1491 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 1492 return ret;
1493}
1494
e51060f0
SH		 1495static int cma_ib_listen(struct rdma_id_private *id_priv)
1496{
1497 struct ib_cm_compare_data compare_data;
1498 struct sockaddr *addr;
0c9361fc 1499 struct ib_cm_id *id;
e51060f0
SH		 1500 __be64 svc_id;
1501 int ret;
1502
0c9361fc
JM		 1503 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1504 if (IS_ERR(id))
1505 return PTR_ERR(id);
1506
1507 id_priv->cm_id.ib = id;
e51060f0 1508
3f446754 1509 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
e51060f0 1510 svc_id = cma_get_service_id(id_priv->id.ps, addr);
406b6a25 1511 if (cma_any_addr(addr) && !id_priv->afonly)
e51060f0
SH		 1512 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1513 else {
1514 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1515 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1516 }
1517
1518 if (ret) {
1519 ib_destroy_cm_id(id_priv->cm_id.ib);
1520 id_priv->cm_id.ib = NULL;
1521 }
1522
1523 return ret;
1524}
1525
07ebafba
TT		 1526static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1527{
1528 int ret;
1529 struct sockaddr_in *sin;
0c9361fc
JM		 1530 struct iw_cm_id *id;
1531
1532 id = iw_create_cm_id(id_priv->id.device,
1533 iw_conn_req_handler,
1534 id_priv);
1535 if (IS_ERR(id))
1536 return PTR_ERR(id);
07ebafba 1537
0c9361fc 1538 id_priv->cm_id.iw = id;
07ebafba
TT		 1539
1540 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1541 id_priv->cm_id.iw->local_addr = *sin;
1542
1543 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1544
1545 if (ret) {
1546 iw_destroy_cm_id(id_priv->cm_id.iw);
1547 id_priv->cm_id.iw = NULL;
1548 }
1549
1550 return ret;
1551}
1552
e51060f0
SH		 1553static int cma_listen_handler(struct rdma_cm_id *id,
1554 struct rdma_cm_event *event)
1555{
1556 struct rdma_id_private *id_priv = id->context;
1557
1558 id->context = id_priv->id.context;
1559 id->event_handler = id_priv->id.event_handler;
1560 return id_priv->id.event_handler(id, event);
1561}
1562
1563static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1564 struct cma_device *cma_dev)
1565{
1566 struct rdma_id_private *dev_id_priv;
1567 struct rdma_cm_id *id;
1568 int ret;
1569
b26f9b99
SH		 1570 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1571 id_priv->id.qp_type);
e51060f0
SH		 1572 if (IS_ERR(id))
1573 return;
1574
1575 dev_id_priv = container_of(id, struct rdma_id_private, id);
1576
550e5ca7 1577 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
e51060f0 1578 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
3f446754 1579 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
e51060f0
SH		 1580
1581 cma_attach_to_dev(dev_id_priv, cma_dev);
1582 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
d02d1f53
SH		 1583 atomic_inc(&id_priv->refcount);
1584 dev_id_priv->internal_id = 1;
5b0ec991 1585 dev_id_priv->afonly = id_priv->afonly;
e51060f0
SH		 1586
1587 ret = rdma_listen(id, id_priv->backlog);
1588 if (ret)
d02d1f53 1589 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
468f2239 1590 "listening on device %s\n", ret, cma_dev->device->name);
e51060f0
SH		 1591}
1592
1593static void cma_listen_on_all(struct rdma_id_private *id_priv)
1594{
1595 struct cma_device *cma_dev;
1596
1597 mutex_lock(&lock);
1598 list_add_tail(&id_priv->list, &listen_any_list);
1599 list_for_each_entry(cma_dev, &dev_list, list)
1600 cma_listen_on_dev(id_priv, cma_dev);
1601 mutex_unlock(&lock);
1602}
1603
a81c994d
SH		 1604void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1605{
1606 struct rdma_id_private *id_priv;
1607
1608 id_priv = container_of(id, struct rdma_id_private, id);
1609 id_priv->tos = (u8) tos;
1610}
1611EXPORT_SYMBOL(rdma_set_service_type);
1612
e51060f0
SH		 1613static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1614 void *context)
1615{
1616 struct cma_work *work = context;
1617 struct rdma_route *route;
1618
1619 route = &work->id->id.route;
1620
1621 if (!status) {
1622 route->num_paths = 1;
1623 *route->path_rec = *path_rec;
1624 } else {
550e5ca7
NM		 1625 work->old_state = RDMA_CM_ROUTE_QUERY;
1626 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0 1627 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1628 work->event.status = status;
e51060f0
SH		 1629 }
1630
1631 queue_work(cma_wq, &work->work);
1632}
1633
1634static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1635 struct cma_work *work)
1636{
a81c994d 1637 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1638 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1639 ib_sa_comp_mask comp_mask;
1640 struct sockaddr_in6 *sin6;
e51060f0
SH		 1641
1642 memset(&path_rec, 0, sizeof path_rec);
6f8372b6
SH		 1643 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1644 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
a81c994d 1645 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1646 path_rec.numb_path = 1;
962063e6 1647 path_rec.reversible = 1;
3f446754
RD		 1648 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1649 (struct sockaddr *) &addr->dst_addr);
a81c994d
SH		 1650
1651 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1652 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1653 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1654
3f446754 1655 if (addr->src_addr.ss_family == AF_INET) {
a81c994d
SH		 1656 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1657 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1658 } else {
1659 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1660 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1661 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1662 }
e51060f0 1663
c1a0b23b 1664 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1665 id_priv->id.port_num, &path_rec,
1666 comp_mask, timeout_ms,
1667 GFP_KERNEL, cma_query_handler,
1668 work, &id_priv->query);
e51060f0
SH		 1669
1670 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1671}
1672
c4028958 1673static void cma_work_handler(struct work_struct *_work)
e51060f0 1674{
c4028958 1675 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1676 struct rdma_id_private *id_priv = work->id;
1677 int destroy = 0;
1678
de910bd9 1679 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 1680 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1681 goto out;
1682
1683 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1684 cma_exch(id_priv, RDMA_CM_DESTROYING);
e51060f0
SH		 1685 destroy = 1;
1686 }
1687out:
de910bd9 1688 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1689 cma_deref_id(id_priv);
1690 if (destroy)
1691 rdma_destroy_id(&id_priv->id);
1692 kfree(work);
1693}
1694
dd5bdff8
OG		 1695static void cma_ndev_work_handler(struct work_struct *_work)
1696{
1697 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1698 struct rdma_id_private *id_priv = work->id;
1699 int destroy = 0;
1700
1701 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 1702 if (id_priv->state == RDMA_CM_DESTROYING ||
1703 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
dd5bdff8
OG		 1704 goto out;
1705
1706 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
550e5ca7 1707 cma_exch(id_priv, RDMA_CM_DESTROYING);
dd5bdff8
OG		 1708 destroy = 1;
1709 }
1710
1711out:
1712 mutex_unlock(&id_priv->handler_mutex);
1713 cma_deref_id(id_priv);
1714 if (destroy)
1715 rdma_destroy_id(&id_priv->id);
1716 kfree(work);
1717}
1718
e51060f0
SH		 1719static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1720{
1721 struct rdma_route *route = &id_priv->id.route;
1722 struct cma_work *work;
1723 int ret;
1724
1725 work = kzalloc(sizeof *work, GFP_KERNEL);
1726 if (!work)
1727 return -ENOMEM;
1728
1729 work->id = id_priv;
c4028958 1730 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1731 work->old_state = RDMA_CM_ROUTE_QUERY;
1732 work->new_state = RDMA_CM_ROUTE_RESOLVED;
e51060f0
SH		 1733 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1734
1735 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1736 if (!route->path_rec) {
1737 ret = -ENOMEM;
1738 goto err1;
1739 }
1740
1741 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1742 if (ret)
1743 goto err2;
1744
1745 return 0;
1746err2:
1747 kfree(route->path_rec);
1748 route->path_rec = NULL;
1749err1:
1750 kfree(work);
1751 return ret;
1752}
1753
1754int rdma_set_ib_paths(struct rdma_cm_id *id,
1755 struct ib_sa_path_rec *path_rec, int num_paths)
1756{
1757 struct rdma_id_private *id_priv;
1758 int ret;
1759
1760 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 1761 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1762 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 1763 return -EINVAL;
1764
9893e742
JL		 1765 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1766 GFP_KERNEL);
e51060f0
SH		 1767 if (!id->route.path_rec) {
1768 ret = -ENOMEM;
1769 goto err;
1770 }
1771
ae2d9293 1772 id->route.num_paths = num_paths;
e51060f0
SH		 1773 return 0;
1774err:
550e5ca7 1775 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 1776 return ret;
1777}
1778EXPORT_SYMBOL(rdma_set_ib_paths);
1779
07ebafba
TT		 1780static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1781{
1782 struct cma_work *work;
1783
1784 work = kzalloc(sizeof *work, GFP_KERNEL);
1785 if (!work)
1786 return -ENOMEM;
1787
1788 work->id = id_priv;
c4028958 1789 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 1790 work->old_state = RDMA_CM_ROUTE_QUERY;
1791 work->new_state = RDMA_CM_ROUTE_RESOLVED;
07ebafba
TT		 1792 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1793 queue_work(cma_wq, &work->work);
1794 return 0;
1795}
1796
3c86aa70
EC		 1797static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1798{
1799 struct rdma_route *route = &id_priv->id.route;
1800 struct rdma_addr *addr = &route->addr;
1801 struct cma_work *work;
1802 int ret;
1803 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1804 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1805 struct net_device *ndev = NULL;
af7bd463 1806 u16 vid;
3c86aa70
EC		 1807
1808 if (src_addr->sin_family != dst_addr->sin_family)
1809 return -EINVAL;
1810
1811 work = kzalloc(sizeof *work, GFP_KERNEL);
1812 if (!work)
1813 return -ENOMEM;
1814
1815 work->id = id_priv;
1816 INIT_WORK(&work->work, cma_work_handler);
1817
1818 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1819 if (!route->path_rec) {
1820 ret = -ENOMEM;
1821 goto err1;
1822 }
1823
1824 route->num_paths = 1;
1825
3c86aa70
EC		 1826 if (addr->dev_addr.bound_dev_if)
1827 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1828 if (!ndev) {
1829 ret = -ENODEV;
1830 goto err2;
1831 }
1832
af7bd463
EC		 1833 vid = rdma_vlan_dev_vlan_id(ndev);
1834
1835 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1836 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1837
1838 route->path_rec->hop_limit = 1;
1839 route->path_rec->reversible = 1;
1840 route->path_rec->pkey = cpu_to_be16(0xffff);
1841 route->path_rec->mtu_selector = IB_SA_EQ;
366cddb4
AV		 1842 route->path_rec->sl = netdev_get_prio_tc_map(
1843 ndev->priv_flags & IFF_802_1Q_VLAN ?
1844 vlan_dev_real_dev(ndev) : ndev,
1845 rt_tos2priority(id_priv->tos));
af7bd463 1846
3c86aa70
EC		 1847 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1848 route->path_rec->rate_selector = IB_SA_EQ;
1849 route->path_rec->rate = iboe_get_rate(ndev);
1850 dev_put(ndev);
1851 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1852 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1853 if (!route->path_rec->mtu) {
1854 ret = -EINVAL;
1855 goto err2;
1856 }
1857
550e5ca7
NM		 1858 work->old_state = RDMA_CM_ROUTE_QUERY;
1859 work->new_state = RDMA_CM_ROUTE_RESOLVED;
3c86aa70
EC		 1860 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1861 work->event.status = 0;
1862
1863 queue_work(cma_wq, &work->work);
1864
1865 return 0;
1866
1867err2:
1868 kfree(route->path_rec);
1869 route->path_rec = NULL;
1870err1:
1871 kfree(work);
1872 return ret;
1873}
1874
e51060f0
SH		 1875int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1876{
1877 struct rdma_id_private *id_priv;
1878 int ret;
1879
1880 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 1881 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 1882 return -EINVAL;
1883
1884 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1885 switch (rdma_node_get_transport(id->device->node_type)) {
1886 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 1887 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1888 case IB_LINK_LAYER_INFINIBAND:
1889 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1890 break;
1891 case IB_LINK_LAYER_ETHERNET:
1892 ret = cma_resolve_iboe_route(id_priv);
1893 break;
1894 default:
1895 ret = -ENOSYS;
1896 }
e51060f0 1897 break;
07ebafba
TT		 1898 case RDMA_TRANSPORT_IWARP:
1899 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1900 break;
e51060f0
SH		 1901 default:
1902 ret = -ENOSYS;
1903 break;
1904 }
1905 if (ret)
1906 goto err;
1907
1908 return 0;
1909err:
550e5ca7 1910 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 1911 cma_deref_id(id_priv);
1912 return ret;
1913}
1914EXPORT_SYMBOL(rdma_resolve_route);
1915
1916static int cma_bind_loopback(struct rdma_id_private *id_priv)
1917{
1918 struct cma_device *cma_dev;
1919 struct ib_port_attr port_attr;
f0ee3404 1920 union ib_gid gid;
e51060f0
SH		 1921 u16 pkey;
1922 int ret;
1923 u8 p;
1924
1925 mutex_lock(&lock);
e82153b5
KK		 1926 if (list_empty(&dev_list)) {
1927 ret = -ENODEV;
1928 goto out;
1929 }
e51060f0
SH		 1930 list_for_each_entry(cma_dev, &dev_list, list)
1931 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1932 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1933 port_attr.state == IB_PORT_ACTIVE)
1934 goto port_found;
1935
e82153b5
KK		 1936 p = 1;
1937 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1938
1939port_found:
f0ee3404 1940 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1941 if (ret)
1942 goto out;
1943
1944 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1945 if (ret)
1946 goto out;
1947
6f8372b6 1948 id_priv->id.route.addr.dev_addr.dev_type =
3c86aa70 1949 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
6f8372b6
SH		 1950 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1951
1952 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1953 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1954 id_priv->id.port_num = p;
1955 cma_attach_to_dev(id_priv, cma_dev);
1956out:
1957 mutex_unlock(&lock);
1958 return ret;
1959}
1960
1961static void addr_handler(int status, struct sockaddr *src_addr,
1962 struct rdma_dev_addr *dev_addr, void *context)
1963{
1964 struct rdma_id_private *id_priv = context;
a1b1b61f 1965 struct rdma_cm_event event;
e51060f0 1966
a1b1b61f 1967 memset(&event, 0, sizeof event);
de910bd9 1968 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 1969 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
1970 RDMA_CM_ADDR_RESOLVED))
61a73c70 1971 goto out;
61a73c70
SH		 1972
1973 if (!status && !id_priv->cma_dev)
e51060f0
SH		 1974 status = cma_acquire_dev(id_priv);
1975
1976 if (status) {
550e5ca7
NM		 1977 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1978 RDMA_CM_ADDR_BOUND))
e51060f0 1979 goto out;
a1b1b61f
SH		 1980 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1981 event.status = status;
e51060f0 1982 } else {
e51060f0
SH		 1983 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1984 ip_addr_size(src_addr));
a1b1b61f 1985 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1986 }
1987
a1b1b61f 1988 if (id_priv->id.event_handler(&id_priv->id, &event)) {
550e5ca7 1989 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 1990 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1991 cma_deref_id(id_priv);
1992 rdma_destroy_id(&id_priv->id);
1993 return;
1994 }
1995out:
de910bd9 1996 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 1997 cma_deref_id(id_priv);
1998}
1999
2000static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2001{
2002 struct cma_work *work;
6f8372b6 2003 struct sockaddr *src, *dst;
f0ee3404 2004 union ib_gid gid;
e51060f0
SH		 2005 int ret;
2006
2007 work = kzalloc(sizeof *work, GFP_KERNEL);
2008 if (!work)
2009 return -ENOMEM;
2010
2011 if (!id_priv->cma_dev) {
2012 ret = cma_bind_loopback(id_priv);
2013 if (ret)
2014 goto err;
2015 }
2016
6f8372b6
SH		 2017 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2018 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 2019
6f8372b6
SH		 2020 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2021 if (cma_zero_addr(src)) {
2022 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2023 if ((src->sa_family = dst->sa_family) == AF_INET) {
4e3fd7a0
AD		 2024 ((struct sockaddr_in *)src)->sin_addr =
2025 ((struct sockaddr_in *)dst)->sin_addr;
6f8372b6 2026 } else {
4e3fd7a0
AD		 2027 ((struct sockaddr_in6 *)src)->sin6_addr =
2028 ((struct sockaddr_in6 *)dst)->sin6_addr;
6f8372b6 2029 }
e51060f0
SH		 2030 }
2031
2032 work->id = id_priv;
c4028958 2033 INIT_WORK(&work->work, cma_work_handler);
550e5ca7
NM		 2034 work->old_state = RDMA_CM_ADDR_QUERY;
2035 work->new_state = RDMA_CM_ADDR_RESOLVED;
e51060f0
SH		 2036 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2037 queue_work(cma_wq, &work->work);
2038 return 0;
2039err:
2040 kfree(work);
2041 return ret;
2042}
2043
2044static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2045 struct sockaddr *dst_addr)
2046{
d14714df
SH		 2047 if (!src_addr || !src_addr->sa_family) {
2048 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2049 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2050 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2051 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2052 }
2053 }
2054 return rdma_bind_addr(id, src_addr);
e51060f0
SH		 2055}
2056
2057int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2058 struct sockaddr *dst_addr, int timeout_ms)
2059{
2060 struct rdma_id_private *id_priv;
2061 int ret;
2062
2063 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2064 if (id_priv->state == RDMA_CM_IDLE) {
e51060f0
SH		 2065 ret = cma_bind_addr(id, src_addr, dst_addr);
2066 if (ret)
2067 return ret;
2068 }
2069
550e5ca7 2070 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
e51060f0
SH		 2071 return -EINVAL;
2072
2073 atomic_inc(&id_priv->refcount);
2074 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2075 if (cma_any_addr(dst_addr))
2076 ret = cma_resolve_loopback(id_priv);
2077 else
3f446754 2078 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
7a118df3 2079 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 2080 timeout_ms, addr_handler, id_priv);
2081 if (ret)
2082 goto err;
2083
2084 return 0;
2085err:
550e5ca7 2086 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 2087 cma_deref_id(id_priv);
2088 return ret;
2089}
2090EXPORT_SYMBOL(rdma_resolve_addr);
2091
a9bb7912
HS		 2092int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2093{
2094 struct rdma_id_private *id_priv;
2095 unsigned long flags;
2096 int ret;
2097
2098 id_priv = container_of(id, struct rdma_id_private, id);
2099 spin_lock_irqsave(&id_priv->lock, flags);
550e5ca7 2100 if (id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 2101 id_priv->reuseaddr = reuse;
2102 ret = 0;
2103 } else {
2104 ret = -EINVAL;
2105 }
2106 spin_unlock_irqrestore(&id_priv->lock, flags);
2107 return ret;
2108}
2109EXPORT_SYMBOL(rdma_set_reuseaddr);
2110
68602120
SH		 2111int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2112{
2113 struct rdma_id_private *id_priv;
2114 unsigned long flags;
2115 int ret;
2116
2117 id_priv = container_of(id, struct rdma_id_private, id);
2118 spin_lock_irqsave(&id_priv->lock, flags);
2119 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2120 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2121 id_priv->afonly = afonly;
2122 ret = 0;
2123 } else {
2124 ret = -EINVAL;
2125 }
2126 spin_unlock_irqrestore(&id_priv->lock, flags);
2127 return ret;
2128}
2129EXPORT_SYMBOL(rdma_set_afonly);
2130
e51060f0
SH		 2131static void cma_bind_port(struct rdma_bind_list *bind_list,
2132 struct rdma_id_private *id_priv)
2133{
2134 struct sockaddr_in *sin;
2135
2136 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2137 sin->sin_port = htons(bind_list->port);
2138 id_priv->bind_list = bind_list;
2139 hlist_add_head(&id_priv->node, &bind_list->owners);
2140}
2141
2142static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2143 unsigned short snum)
2144{
2145 struct rdma_bind_list *bind_list;
3b069c5d 2146 int ret;
e51060f0 2147
cb164b8c 2148 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 2149 if (!bind_list)
2150 return -ENOMEM;
2151
3b069c5d
TH		 2152 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2153 if (ret < 0)
2154 goto err;
aedec080
SH		 2155
2156 bind_list->ps = ps;
3b069c5d 2157 bind_list->port = (unsigned short)ret;
aedec080
SH		 2158 cma_bind_port(bind_list, id_priv);
2159 return 0;
3b069c5d 2160err:
aedec080 2161 kfree(bind_list);
3b069c5d 2162 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
aedec080 2163}
e51060f0 2164
aedec080
SH		 2165static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2166{
5d7220e8
TH		 2167 static unsigned int last_used_port;
2168 int low, high, remaining;
2169 unsigned int rover;
e51060f0 2170
227b60f5 2171 inet_get_local_port_range(&low, &high);
5d7220e8
TH		 2172 remaining = (high - low) + 1;
2173 rover = net_random() % remaining + low;
2174retry:
2175 if (last_used_port != rover &&
2176 !idr_find(ps, (unsigned short) rover)) {
2177 int ret = cma_alloc_port(ps, id_priv, rover);
2178 /*
2179 * Remember previously used port number in order to avoid
2180 * re-using same port immediately after it is closed.
2181 */
2182 if (!ret)
2183 last_used_port = rover;
2184 if (ret != -EADDRNOTAVAIL)
2185 return ret;
e51060f0 2186 }
5d7220e8
TH		 2187 if (--remaining) {
2188 rover++;
2189 if ((rover < low) || (rover > high))
2190 rover = low;
2191 goto retry;
2192 }
2193 return -EADDRNOTAVAIL;
e51060f0
SH		 2194}
2195
a9bb7912
HS		 2196/*
2197 * Check that the requested port is available. This is called when trying to
2198 * bind to a specific port, or when trying to listen on a bound port. In
2199 * the latter case, the provided id_priv may already be on the bind_list, but
2200 * we still need to check that it's okay to start listening.
2201 */
2202static int cma_check_port(struct rdma_bind_list *bind_list,
2203 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 2204{
2205 struct rdma_id_private *cur_id;
43b752da 2206 struct sockaddr *addr, *cur_addr;
e51060f0 2207
43b752da 2208 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
b67bfe0d 2209 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
a9bb7912
HS		 2210 if (id_priv == cur_id)
2211 continue;
3cd96564 2212
5b0ec991
SH		 2213 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2214 cur_id->reuseaddr)
2215 continue;
e51060f0 2216
5b0ec991
SH		 2217 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2218 if (id_priv->afonly && cur_id->afonly &&
2219 (addr->sa_family != cur_addr->sa_family))
2220 continue;
2221
2222 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2223 return -EADDRNOTAVAIL;
2224
2225 if (!cma_addr_cmp(addr, cur_addr))
2226 return -EADDRINUSE;
a9bb7912 2227 }
e51060f0
SH		 2228 return 0;
2229}
2230
a9bb7912
HS		 2231static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2232{
2233 struct rdma_bind_list *bind_list;
2234 unsigned short snum;
2235 int ret;
2236
2237 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2238 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2239 return -EACCES;
2240
2241 bind_list = idr_find(ps, snum);
2242 if (!bind_list) {
2243 ret = cma_alloc_port(ps, id_priv, snum);
2244 } else {
2245 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2246 if (!ret)
2247 cma_bind_port(bind_list, id_priv);
2248 }
2249 return ret;
2250}
2251
2252static int cma_bind_listen(struct rdma_id_private *id_priv)
2253{
2254 struct rdma_bind_list *bind_list = id_priv->bind_list;
2255 int ret = 0;
2256
2257 mutex_lock(&lock);
2258 if (bind_list->owners.first->next)
2259 ret = cma_check_port(bind_list, id_priv, 0);
2260 mutex_unlock(&lock);
2261 return ret;
2262}
2263
e51060f0
SH		 2264static int cma_get_port(struct rdma_id_private *id_priv)
2265{
2266 struct idr *ps;
2267 int ret;
2268
2269 switch (id_priv->id.ps) {
2270 case RDMA_PS_SDP:
2271 ps = &sdp_ps;
2272 break;
2273 case RDMA_PS_TCP:
2274 ps = &tcp_ps;
2275 break;
628e5f6d
SH		 2276 case RDMA_PS_UDP:
2277 ps = &udp_ps;
2278 break;
c8f6a362
SH		 2279 case RDMA_PS_IPOIB:
2280 ps = &ipoib_ps;
2281 break;
2d2e9415
SH		 2282 case RDMA_PS_IB:
2283 ps = &ib_ps;
2284 break;
e51060f0
SH		 2285 default:
2286 return -EPROTONOSUPPORT;
2287 }
2288
2289 mutex_lock(&lock);
3f446754 2290 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
aedec080 2291 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2292 else
2293 ret = cma_use_port(ps, id_priv);
2294 mutex_unlock(&lock);
2295
2296 return ret;
2297}
2298
d14714df
SH		 2299static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2300 struct sockaddr *addr)
2301{
d90f9b35 2302#if IS_ENABLED(CONFIG_IPV6)
d14714df
SH		 2303 struct sockaddr_in6 *sin6;
2304
2305 if (addr->sa_family != AF_INET6)
2306 return 0;
2307
2308 sin6 = (struct sockaddr_in6 *) addr;
2309 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2310 !sin6->sin6_scope_id)
2311 return -EINVAL;
2312
2313 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2314#endif
2315 return 0;
2316}
2317
a9bb7912
HS		 2318int rdma_listen(struct rdma_cm_id *id, int backlog)
2319{
2320 struct rdma_id_private *id_priv;
2321 int ret;
2322
2323 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2324 if (id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 2325 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2326 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2327 if (ret)
2328 return ret;
2329 }
2330
550e5ca7 2331 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
a9bb7912
HS		 2332 return -EINVAL;
2333
2334 if (id_priv->reuseaddr) {
2335 ret = cma_bind_listen(id_priv);
2336 if (ret)
2337 goto err;
2338 }
2339
2340 id_priv->backlog = backlog;
2341 if (id->device) {
2342 switch (rdma_node_get_transport(id->device->node_type)) {
2343 case RDMA_TRANSPORT_IB:
2344 ret = cma_ib_listen(id_priv);
2345 if (ret)
2346 goto err;
2347 break;
2348 case RDMA_TRANSPORT_IWARP:
2349 ret = cma_iw_listen(id_priv, backlog);
2350 if (ret)
2351 goto err;
2352 break;
2353 default:
2354 ret = -ENOSYS;
2355 goto err;
2356 }
2357 } else
2358 cma_listen_on_all(id_priv);
2359
2360 return 0;
2361err:
2362 id_priv->backlog = 0;
550e5ca7 2363 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 2364 return ret;
2365}
2366EXPORT_SYMBOL(rdma_listen);
2367
e51060f0
SH		 2368int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2369{
2370 struct rdma_id_private *id_priv;
2371 int ret;
2372
1f5175ad 2373 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
e51060f0
SH		 2374 return -EAFNOSUPPORT;
2375
2376 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2377 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 2378 return -EINVAL;
2379
d14714df
SH		 2380 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2381 if (ret)
2382 goto err1;
2383
8523c048 2384 if (!cma_any_addr(addr)) {
e51060f0 2385 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2386 if (ret)
255d0c14
KK		 2387 goto err1;
2388
255d0c14 2389 ret = cma_acquire_dev(id_priv);
255d0c14
KK		 2390 if (ret)
2391 goto err1;
e51060f0
SH		 2392 }
2393
2394 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
68602120
SH		 2395 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2396 if (addr->sa_family == AF_INET)
2397 id_priv->afonly = 1;
5b0ec991 2398#if IS_ENABLED(CONFIG_IPV6)
68602120
SH		 2399 else if (addr->sa_family == AF_INET6)
2400 id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
5b0ec991 2401#endif
68602120 2402 }
e51060f0
SH		 2403 ret = cma_get_port(id_priv);
2404 if (ret)
255d0c14 2405 goto err2;
e51060f0
SH		 2406
2407 return 0;
255d0c14 2408err2:
a396d43a
SH		 2409 if (id_priv->cma_dev)
2410 cma_release_dev(id_priv);
255d0c14 2411err1:
550e5ca7 2412 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 2413 return ret;
2414}
2415EXPORT_SYMBOL(rdma_bind_addr);
2416
2417static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2418 struct rdma_route *route)
2419{
e51060f0
SH		 2420 struct cma_hdr *cma_hdr;
2421 struct sdp_hh *sdp_hdr;
2422
1f5175ad
AS		 2423 if (route->addr.src_addr.ss_family == AF_INET) {
2424 struct sockaddr_in *src4, *dst4;
2425
2426 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2427 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2428
2429 switch (ps) {
2430 case RDMA_PS_SDP:
2431 sdp_hdr = hdr;
2432 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2433 return -EINVAL;
2434 sdp_set_ip_ver(sdp_hdr, 4);
2435 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2436 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2437 sdp_hdr->port = src4->sin_port;
2438 break;
2439 default:
2440 cma_hdr = hdr;
2441 cma_hdr->cma_version = CMA_VERSION;
2442 cma_set_ip_ver(cma_hdr, 4);
2443 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2444 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2445 cma_hdr->port = src4->sin_port;
2446 break;
2447 }
2448 } else {
2449 struct sockaddr_in6 *src6, *dst6;
2450
2451 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2452 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2453
2454 switch (ps) {
2455 case RDMA_PS_SDP:
2456 sdp_hdr = hdr;
2457 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2458 return -EINVAL;
2459 sdp_set_ip_ver(sdp_hdr, 6);
2460 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2461 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2462 sdp_hdr->port = src6->sin6_port;
2463 break;
2464 default:
2465 cma_hdr = hdr;
2466 cma_hdr->cma_version = CMA_VERSION;
2467 cma_set_ip_ver(cma_hdr, 6);
2468 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2469 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2470 cma_hdr->port = src6->sin6_port;
2471 break;
2472 }
e51060f0
SH		 2473 }
2474 return 0;
2475}
2476
628e5f6d
SH		 2477static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2478 struct ib_cm_event *ib_event)
2479{
2480 struct rdma_id_private *id_priv = cm_id->context;
2481 struct rdma_cm_event event;
2482 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2483 int ret = 0;
2484
550e5ca7 2485 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
8aa08602 2486 return 0;
628e5f6d 2487
8aa08602 2488 memset(&event, 0, sizeof event);
628e5f6d
SH		 2489 switch (ib_event->event) {
2490 case IB_CM_SIDR_REQ_ERROR:
2491 event.event = RDMA_CM_EVENT_UNREACHABLE;
2492 event.status = -ETIMEDOUT;
2493 break;
2494 case IB_CM_SIDR_REP_RECEIVED:
2495 event.param.ud.private_data = ib_event->private_data;
2496 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2497 if (rep->status != IB_SIDR_SUCCESS) {
2498 event.event = RDMA_CM_EVENT_UNREACHABLE;
2499 event.status = ib_event->param.sidr_rep_rcvd.status;
2500 break;
2501 }
d2ca39f2
YE		 2502 ret = cma_set_qkey(id_priv);
2503 if (ret) {
2504 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2505 event.status = -EINVAL;
2506 break;
2507 }
c8f6a362 2508 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2509 event.event = RDMA_CM_EVENT_UNREACHABLE;
2510 event.status = -EINVAL;
2511 break;
2512 }
2513 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2514 id_priv->id.route.path_rec,
2515 &event.param.ud.ah_attr);
2516 event.param.ud.qp_num = rep->qpn;
2517 event.param.ud.qkey = rep->qkey;
2518 event.event = RDMA_CM_EVENT_ESTABLISHED;
2519 event.status = 0;
2520 break;
2521 default:
468f2239 2522 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 2523 ib_event->event);
2524 goto out;
2525 }
2526
2527 ret = id_priv->id.event_handler(&id_priv->id, &event);
2528 if (ret) {
2529 /* Destroy the CM ID by returning a non-zero value. */
2530 id_priv->cm_id.ib = NULL;
550e5ca7 2531 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2532 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2533 rdma_destroy_id(&id_priv->id);
2534 return ret;
2535 }
2536out:
de910bd9 2537 mutex_unlock(&id_priv->handler_mutex);
628e5f6d
SH		 2538 return ret;
2539}
2540
2541static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2542 struct rdma_conn_param *conn_param)
2543{
2544 struct ib_cm_sidr_req_param req;
2545 struct rdma_route *route;
0c9361fc 2546 struct ib_cm_id *id;
628e5f6d
SH		 2547 int ret;
2548
2549 req.private_data_len = sizeof(struct cma_hdr) +
2550 conn_param->private_data_len;
04ded167
SH		 2551 if (req.private_data_len < conn_param->private_data_len)
2552 return -EINVAL;
2553
628e5f6d
SH		 2554 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2555 if (!req.private_data)
2556 return -ENOMEM;
2557
2558 if (conn_param->private_data && conn_param->private_data_len)
2559 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2560 conn_param->private_data, conn_param->private_data_len);
2561
2562 route = &id_priv->id.route;
2563 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2564 if (ret)
2565 goto out;
2566
0c9361fc
JM		 2567 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2568 id_priv);
2569 if (IS_ERR(id)) {
2570 ret = PTR_ERR(id);
628e5f6d
SH		 2571 goto out;
2572 }
0c9361fc 2573 id_priv->cm_id.ib = id;
628e5f6d
SH		 2574
2575 req.path = route->path_rec;
2576 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2577 (struct sockaddr *) &route->addr.dst_addr);
628e5f6d
SH		 2578 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2579 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2580
2581 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2582 if (ret) {
2583 ib_destroy_cm_id(id_priv->cm_id.ib);
2584 id_priv->cm_id.ib = NULL;
2585 }
2586out:
2587 kfree(req.private_data);
2588 return ret;
2589}
2590
e51060f0
SH		 2591static int cma_connect_ib(struct rdma_id_private *id_priv,
2592 struct rdma_conn_param *conn_param)
2593{
2594 struct ib_cm_req_param req;
2595 struct rdma_route *route;
2596 void *private_data;
0c9361fc 2597 struct ib_cm_id *id;
e51060f0
SH		 2598 int offset, ret;
2599
2600 memset(&req, 0, sizeof req);
2601 offset = cma_user_data_offset(id_priv->id.ps);
2602 req.private_data_len = offset + conn_param->private_data_len;
04ded167
SH		 2603 if (req.private_data_len < conn_param->private_data_len)
2604 return -EINVAL;
2605
e51060f0
SH		 2606 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2607 if (!private_data)
2608 return -ENOMEM;
2609
2610 if (conn_param->private_data && conn_param->private_data_len)
2611 memcpy(private_data + offset, conn_param->private_data,
2612 conn_param->private_data_len);
2613
0c9361fc
JM		 2614 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2615 if (IS_ERR(id)) {
2616 ret = PTR_ERR(id);
e51060f0
SH		 2617 goto out;
2618 }
0c9361fc 2619 id_priv->cm_id.ib = id;
e51060f0
SH		 2620
2621 route = &id_priv->id.route;
2622 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2623 if (ret)
2624 goto out;
2625 req.private_data = private_data;
2626
2627 req.primary_path = &route->path_rec[0];
2628 if (route->num_paths == 2)
2629 req.alternate_path = &route->path_rec[1];
2630
2631 req.service_id = cma_get_service_id(id_priv->id.ps,
3f446754 2632 (struct sockaddr *) &route->addr.dst_addr);
e51060f0 2633 req.qp_num = id_priv->qp_num;
18c441a6 2634 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 2635 req.starting_psn = id_priv->seq_num;
2636 req.responder_resources = conn_param->responder_resources;
2637 req.initiator_depth = conn_param->initiator_depth;
2638 req.flow_control = conn_param->flow_control;
4ede178a
SH		 2639 req.retry_count = min_t(u8, 7, conn_param->retry_count);
2640 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 2641 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2642 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2643 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2644 req.srq = id_priv->srq ? 1 : 0;
2645
2646 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2647out:
0c9361fc
JM		 2648 if (ret && !IS_ERR(id)) {
2649 ib_destroy_cm_id(id);
675a027c
KK		 2650 id_priv->cm_id.ib = NULL;
2651 }
2652
e51060f0
SH		 2653 kfree(private_data);
2654 return ret;
2655}
2656
07ebafba
TT		 2657static int cma_connect_iw(struct rdma_id_private *id_priv,
2658 struct rdma_conn_param *conn_param)
2659{
2660 struct iw_cm_id *cm_id;
2661 struct sockaddr_in* sin;
2662 int ret;
2663 struct iw_cm_conn_param iw_param;
2664
2665 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 2666 if (IS_ERR(cm_id))
2667 return PTR_ERR(cm_id);
07ebafba
TT		 2668
2669 id_priv->cm_id.iw = cm_id;
2670
2671 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2672 cm_id->local_addr = *sin;
2673
2674 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2675 cm_id->remote_addr = *sin;
2676
5851bb89 2677 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 2678 if (ret)
2679 goto out;
07ebafba 2680
f45ee80e
HS		 2681 if (conn_param) {
2682 iw_param.ord = conn_param->initiator_depth;
2683 iw_param.ird = conn_param->responder_resources;
2684 iw_param.private_data = conn_param->private_data;
2685 iw_param.private_data_len = conn_param->private_data_len;
2686 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2687 } else {
2688 memset(&iw_param, 0, sizeof iw_param);
07ebafba 2689 iw_param.qpn = id_priv->qp_num;
f45ee80e 2690 }
07ebafba
TT		 2691 ret = iw_cm_connect(cm_id, &iw_param);
2692out:
0c9361fc 2693 if (ret) {
675a027c
KK		 2694 iw_destroy_cm_id(cm_id);
2695 id_priv->cm_id.iw = NULL;
2696 }
07ebafba
TT		 2697 return ret;
2698}
2699
e51060f0
SH		 2700int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2701{
2702 struct rdma_id_private *id_priv;
2703 int ret;
2704
2705 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 2706 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
e51060f0
SH		 2707 return -EINVAL;
2708
2709 if (!id->qp) {
2710 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2711 id_priv->srq = conn_param->srq;
2712 }
2713
07ebafba
TT		 2714 switch (rdma_node_get_transport(id->device->node_type)) {
2715 case RDMA_TRANSPORT_IB:
b26f9b99 2716 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 2717 ret = cma_resolve_ib_udp(id_priv, conn_param);
2718 else
2719 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2720 break;
07ebafba
TT		 2721 case RDMA_TRANSPORT_IWARP:
2722 ret = cma_connect_iw(id_priv, conn_param);
2723 break;
e51060f0
SH		 2724 default:
2725 ret = -ENOSYS;
2726 break;
2727 }
2728 if (ret)
2729 goto err;
2730
2731 return 0;
2732err:
550e5ca7 2733 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
e51060f0
SH		 2734 return ret;
2735}
2736EXPORT_SYMBOL(rdma_connect);
2737
2738static int cma_accept_ib(struct rdma_id_private *id_priv,
2739 struct rdma_conn_param *conn_param)
2740{
2741 struct ib_cm_rep_param rep;
5851bb89 2742 int ret;
0fe313b0 2743
5851bb89
SH		 2744 ret = cma_modify_qp_rtr(id_priv, conn_param);
2745 if (ret)
2746 goto out;
0fe313b0 2747
5851bb89
SH		 2748 ret = cma_modify_qp_rts(id_priv, conn_param);
2749 if (ret)
2750 goto out;
e51060f0
SH		 2751
2752 memset(&rep, 0, sizeof rep);
2753 rep.qp_num = id_priv->qp_num;
2754 rep.starting_psn = id_priv->seq_num;
2755 rep.private_data = conn_param->private_data;
2756 rep.private_data_len = conn_param->private_data_len;
2757 rep.responder_resources = conn_param->responder_resources;
2758 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2759 rep.failover_accepted = 0;
2760 rep.flow_control = conn_param->flow_control;
4ede178a 2761 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 2762 rep.srq = id_priv->srq ? 1 : 0;
2763
0fe313b0
SH		 2764 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2765out:
2766 return ret;
e51060f0
SH		 2767}
2768
07ebafba
TT		 2769static int cma_accept_iw(struct rdma_id_private *id_priv,
2770 struct rdma_conn_param *conn_param)
2771{
2772 struct iw_cm_conn_param iw_param;
2773 int ret;
2774
11f43b27
SW		 2775 if (!conn_param)
2776 return -EINVAL;
2777
5851bb89 2778 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 2779 if (ret)
2780 return ret;
2781
2782 iw_param.ord = conn_param->initiator_depth;
2783 iw_param.ird = conn_param->responder_resources;
2784 iw_param.private_data = conn_param->private_data;
2785 iw_param.private_data_len = conn_param->private_data_len;
2786 if (id_priv->id.qp) {
2787 iw_param.qpn = id_priv->qp_num;
2788 } else
2789 iw_param.qpn = conn_param->qp_num;
2790
2791 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2792}
2793
628e5f6d
SH		 2794static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2795 enum ib_cm_sidr_status status,
2796 const void *private_data, int private_data_len)
2797{
2798 struct ib_cm_sidr_rep_param rep;
d2ca39f2 2799 int ret;
628e5f6d
SH		 2800
2801 memset(&rep, 0, sizeof rep);
2802 rep.status = status;
2803 if (status == IB_SIDR_SUCCESS) {
d2ca39f2
YE		 2804 ret = cma_set_qkey(id_priv);
2805 if (ret)
2806 return ret;
628e5f6d 2807 rep.qp_num = id_priv->qp_num;
c8f6a362 2808 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2809 }
2810 rep.private_data = private_data;
2811 rep.private_data_len = private_data_len;
2812
2813 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2814}
2815
e51060f0
SH		 2816int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2817{
2818 struct rdma_id_private *id_priv;
2819 int ret;
2820
2821 id_priv = container_of(id, struct rdma_id_private, id);
83e9502d
NM		 2822
2823 id_priv->owner = task_pid_nr(current);
2824
550e5ca7 2825 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
e51060f0
SH		 2826 return -EINVAL;
2827
2828 if (!id->qp && conn_param) {
2829 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2830 id_priv->srq = conn_param->srq;
2831 }
2832
07ebafba
TT		 2833 switch (rdma_node_get_transport(id->device->node_type)) {
2834 case RDMA_TRANSPORT_IB:
f45ee80e
HS		 2835 if (id->qp_type == IB_QPT_UD) {
2836 if (conn_param)
2837 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2838 conn_param->private_data,
2839 conn_param->private_data_len);
2840 else
2841 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2842 NULL, 0);
2843 } else {
2844 if (conn_param)
2845 ret = cma_accept_ib(id_priv, conn_param);
2846 else
2847 ret = cma_rep_recv(id_priv);
2848 }
e51060f0 2849 break;
07ebafba
TT		 2850 case RDMA_TRANSPORT_IWARP:
2851 ret = cma_accept_iw(id_priv, conn_param);
2852 break;
e51060f0
SH		 2853 default:
2854 ret = -ENOSYS;
2855 break;
2856 }
2857
2858 if (ret)
2859 goto reject;
2860
2861 return 0;
2862reject:
c5483388 2863 cma_modify_qp_err(id_priv);
e51060f0
SH		 2864 rdma_reject(id, NULL, 0);
2865 return ret;
2866}
2867EXPORT_SYMBOL(rdma_accept);
2868
0fe313b0
SH		 2869int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2870{
2871 struct rdma_id_private *id_priv;
2872 int ret;
2873
2874 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 2875 if (!id_priv->cm_id.ib)
0fe313b0
SH		 2876 return -EINVAL;
2877
2878 switch (id->device->node_type) {
2879 case RDMA_NODE_IB_CA:
2880 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2881 break;
2882 default:
2883 ret = 0;
2884 break;
2885 }
2886 return ret;
2887}
2888EXPORT_SYMBOL(rdma_notify);
2889
e51060f0
SH		 2890int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2891 u8 private_data_len)
2892{
2893 struct rdma_id_private *id_priv;
2894 int ret;
2895
2896 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 2897 if (!id_priv->cm_id.ib)
e51060f0
SH		 2898 return -EINVAL;
2899
07ebafba
TT		 2900 switch (rdma_node_get_transport(id->device->node_type)) {
2901 case RDMA_TRANSPORT_IB:
b26f9b99 2902 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 2903 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2904 private_data, private_data_len);
2905 else
2906 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2907 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2908 0, private_data, private_data_len);
e51060f0 2909 break;
07ebafba
TT		 2910 case RDMA_TRANSPORT_IWARP:
2911 ret = iw_cm_reject(id_priv->cm_id.iw,
2912 private_data, private_data_len);
2913 break;
e51060f0
SH		 2914 default:
2915 ret = -ENOSYS;
2916 break;
2917 }
2918 return ret;
2919}
2920EXPORT_SYMBOL(rdma_reject);
2921
2922int rdma_disconnect(struct rdma_cm_id *id)
2923{
2924 struct rdma_id_private *id_priv;
2925 int ret;
2926
2927 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 2928 if (!id_priv->cm_id.ib)
e51060f0
SH		 2929 return -EINVAL;
2930
07ebafba
TT		 2931 switch (rdma_node_get_transport(id->device->node_type)) {
2932 case RDMA_TRANSPORT_IB:
c5483388 2933 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2934 if (ret)
2935 goto out;
e51060f0
SH		 2936 /* Initiate or respond to a disconnect. */
2937 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2938 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2939 break;
07ebafba
TT		 2940 case RDMA_TRANSPORT_IWARP:
2941 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2942 break;
e51060f0 2943 default:
07ebafba 2944 ret = -EINVAL;
e51060f0
SH		 2945 break;
2946 }
2947out:
2948 return ret;
2949}
2950EXPORT_SYMBOL(rdma_disconnect);
2951
c8f6a362
SH		 2952static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2953{
2954 struct rdma_id_private *id_priv;
2955 struct cma_multicast *mc = multicast->context;
2956 struct rdma_cm_event event;
2957 int ret;
2958
2959 id_priv = mc->id_priv;
550e5ca7
NM		 2960 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
2961 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
8aa08602 2962 return 0;
c8f6a362 2963
c5483388 2964 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2965 if (!status && id_priv->id.qp)
2966 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
46ea5061 2967 be16_to_cpu(multicast->rec.mlid));
c5483388 2968 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2969
2970 memset(&event, 0, sizeof event);
2971 event.status = status;
2972 event.param.ud.private_data = mc->context;
2973 if (!status) {
2974 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2975 ib_init_ah_from_mcmember(id_priv->id.device,
2976 id_priv->id.port_num, &multicast->rec,
2977 &event.param.ud.ah_attr);
2978 event.param.ud.qp_num = 0xFFFFFF;
2979 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2980 } else
2981 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2982
2983 ret = id_priv->id.event_handler(&id_priv->id, &event);
2984 if (ret) {
550e5ca7 2985 cma_exch(id_priv, RDMA_CM_DESTROYING);
de910bd9 2986 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2987 rdma_destroy_id(&id_priv->id);
2988 return 0;
2989 }
8aa08602 2990
de910bd9 2991 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 2992 return 0;
2993}
2994
2995static void cma_set_mgid(struct rdma_id_private *id_priv,
2996 struct sockaddr *addr, union ib_gid *mgid)
2997{
2998 unsigned char mc_map[MAX_ADDR_LEN];
2999 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3000 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3001 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3002
3003 if (cma_any_addr(addr)) {
3004 memset(mgid, 0, sizeof *mgid);
3005 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 3006 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 3007 0xFF10A01B)) {
3008 /* IPv6 address is an SA assigned MGID. */
3009 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
e2e62697
JG		 3010 } else if ((addr->sa_family == AF_INET6)) {
3011 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3012 if (id_priv->id.ps == RDMA_PS_UDP)
3013 mc_map[7] = 0x01; /* Use RDMA CM signature */
3014 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 3015 } else {
a9e527e3 3016 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 3017 if (id_priv->id.ps == RDMA_PS_UDP)
3018 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 3019 *mgid = *(union ib_gid *) (mc_map + 4);
3020 }
3021}
3022
3023static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3024 struct cma_multicast *mc)
3025{
3026 struct ib_sa_mcmember_rec rec;
3027 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3028 ib_sa_comp_mask comp_mask;
3029 int ret;
3030
3031 ib_addr_get_mgid(dev_addr, &rec.mgid);
3032 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3033 &rec.mgid, &rec);
3034 if (ret)
3035 return ret;
3036
3f446754 3037 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
c8f6a362
SH		 3038 if (id_priv->id.ps == RDMA_PS_UDP)
3039 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
6f8372b6 3040 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362
SH		 3041 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3042 rec.join_state = 1;
3043
3044 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3045 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3046 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3047 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3048 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3049
84adeee9
YE		 3050 if (id_priv->id.ps == RDMA_PS_IPOIB)
3051 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2a22fb8c
DB		 3052 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3053 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3054 IB_SA_MCMEMBER_REC_MTU |
3055 IB_SA_MCMEMBER_REC_HOP_LIMIT;
84adeee9 3056
c8f6a362
SH		 3057 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3058 id_priv->id.port_num, &rec,
3059 comp_mask, GFP_KERNEL,
3060 cma_ib_mc_handler, mc);
4e289045 3061 return PTR_RET(mc->multicast.ib);
c8f6a362
SH		 3062}
3063
3c86aa70
EC		 3064static void iboe_mcast_work_handler(struct work_struct *work)
3065{
3066 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3067 struct cma_multicast *mc = mw->mc;
3068 struct ib_sa_multicast *m = mc->multicast.ib;
3069
3070 mc->multicast.ib->context = mc;
3071 cma_ib_mc_handler(0, m);
3072 kref_put(&mc->mcref, release_mc);
3073 kfree(mw);
3074}
3075
3076static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3077{
3078 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3079 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3080
3081 if (cma_any_addr(addr)) {
3082 memset(mgid, 0, sizeof *mgid);
3083 } else if (addr->sa_family == AF_INET6) {
3084 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3085 } else {
3086 mgid->raw[0] = 0xff;
3087 mgid->raw[1] = 0x0e;
3088 mgid->raw[2] = 0;
3089 mgid->raw[3] = 0;
3090 mgid->raw[4] = 0;
3091 mgid->raw[5] = 0;
3092 mgid->raw[6] = 0;
3093 mgid->raw[7] = 0;
3094 mgid->raw[8] = 0;
3095 mgid->raw[9] = 0;
3096 mgid->raw[10] = 0xff;
3097 mgid->raw[11] = 0xff;
3098 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3099 }
3100}
3101
3102static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3103 struct cma_multicast *mc)
3104{
3105 struct iboe_mcast_work *work;
3106 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3107 int err;
3108 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3109 struct net_device *ndev = NULL;
3110
3111 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3112 return -EINVAL;
3113
3114 work = kzalloc(sizeof *work, GFP_KERNEL);
3115 if (!work)
3116 return -ENOMEM;
3117
3118 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3119 if (!mc->multicast.ib) {
3120 err = -ENOMEM;
3121 goto out1;
3122 }
3123
3124 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3125
3126 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3127 if (id_priv->id.ps == RDMA_PS_UDP)
3128 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3129
3130 if (dev_addr->bound_dev_if)
3131 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3132 if (!ndev) {
3133 err = -ENODEV;
3134 goto out2;
3135 }
3136 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3137 mc->multicast.ib->rec.hop_limit = 1;
3138 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3139 dev_put(ndev);
3140 if (!mc->multicast.ib->rec.mtu) {
3141 err = -EINVAL;
3142 goto out2;
3143 }
3144 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3145 work->id = id_priv;
3146 work->mc = mc;
3147 INIT_WORK(&work->work, iboe_mcast_work_handler);
3148 kref_get(&mc->mcref);
3149 queue_work(cma_wq, &work->work);
3150
3151 return 0;
3152
3153out2:
3154 kfree(mc->multicast.ib);
3155out1:
3156 kfree(work);
3157 return err;
3158}
3159
c8f6a362
SH		 3160int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3161 void *context)
3162{
3163 struct rdma_id_private *id_priv;
3164 struct cma_multicast *mc;
3165 int ret;
3166
3167 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 3168 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3169 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 3170 return -EINVAL;
3171
3172 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3173 if (!mc)
3174 return -ENOMEM;
3175
3176 memcpy(&mc->addr, addr, ip_addr_size(addr));
3177 mc->context = context;
3178 mc->id_priv = id_priv;
3179
3180 spin_lock(&id_priv->lock);
3181 list_add(&mc->list, &id_priv->mc_list);
3182 spin_unlock(&id_priv->lock);
3183
3184 switch (rdma_node_get_transport(id->device->node_type)) {
3185 case RDMA_TRANSPORT_IB:
3c86aa70
EC		 3186 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3187 case IB_LINK_LAYER_INFINIBAND:
3188 ret = cma_join_ib_multicast(id_priv, mc);
3189 break;
3190 case IB_LINK_LAYER_ETHERNET:
3191 kref_init(&mc->mcref);
3192 ret = cma_iboe_join_multicast(id_priv, mc);
3193 break;
3194 default:
3195 ret = -EINVAL;
3196 }
c8f6a362
SH		 3197 break;
3198 default:
3199 ret = -ENOSYS;
3200 break;
3201 }
3202
3203 if (ret) {
3204 spin_lock_irq(&id_priv->lock);
3205 list_del(&mc->list);
3206 spin_unlock_irq(&id_priv->lock);
3207 kfree(mc);
3208 }
3209 return ret;
3210}
3211EXPORT_SYMBOL(rdma_join_multicast);
3212
3213void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3214{
3215 struct rdma_id_private *id_priv;
3216 struct cma_multicast *mc;
3217
3218 id_priv = container_of(id, struct rdma_id_private, id);
3219 spin_lock_irq(&id_priv->lock);
3220 list_for_each_entry(mc, &id_priv->mc_list, list) {
3221 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3222 list_del(&mc->list);
3223 spin_unlock_irq(&id_priv->lock);
3224
3225 if (id->qp)
3226 ib_detach_mcast(id->qp,
3227 &mc->multicast.ib->rec.mgid,
46ea5061 3228 be16_to_cpu(mc->multicast.ib->rec.mlid));
3c86aa70
EC		 3229 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3230 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3231 case IB_LINK_LAYER_INFINIBAND:
3232 ib_sa_free_multicast(mc->multicast.ib);
3233 kfree(mc);
3234 break;
3235 case IB_LINK_LAYER_ETHERNET:
3236 kref_put(&mc->mcref, release_mc);
3237 break;
3238 default:
3239 break;
3240 }
3241 }
c8f6a362
SH		 3242 return;
3243 }
3244 }
3245 spin_unlock_irq(&id_priv->lock);
3246}
3247EXPORT_SYMBOL(rdma_leave_multicast);
3248
dd5bdff8
OG		 3249static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3250{
3251 struct rdma_dev_addr *dev_addr;
3252 struct cma_ndev_work *work;
3253
3254 dev_addr = &id_priv->id.route.addr.dev_addr;
3255
6266ed6e 3256 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
dd5bdff8
OG		 3257 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3258 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3259 ndev->name, &id_priv->id);
3260 work = kzalloc(sizeof *work, GFP_KERNEL);
3261 if (!work)
3262 return -ENOMEM;
3263
3264 INIT_WORK(&work->work, cma_ndev_work_handler);
3265 work->id = id_priv;
3266 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3267 atomic_inc(&id_priv->refcount);
3268 queue_work(cma_wq, &work->work);
3269 }
3270
3271 return 0;
3272}
3273
3274static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3275 void *ctx)
3276{
3277 struct net_device *ndev = (struct net_device *)ctx;
3278 struct cma_device *cma_dev;
3279 struct rdma_id_private *id_priv;
3280 int ret = NOTIFY_DONE;
3281
3282 if (dev_net(ndev) != &init_net)
3283 return NOTIFY_DONE;
3284
3285 if (event != NETDEV_BONDING_FAILOVER)
3286 return NOTIFY_DONE;
3287
3288 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3289 return NOTIFY_DONE;
3290
3291 mutex_lock(&lock);
3292 list_for_each_entry(cma_dev, &dev_list, list)
3293 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3294 ret = cma_netdev_change(ndev, id_priv);
3295 if (ret)
3296 goto out;
3297 }
3298
3299out:
3300 mutex_unlock(&lock);
3301 return ret;
3302}
3303
3304static struct notifier_block cma_nb = {
3305 .notifier_call = cma_netdev_callback
3306};
3307
e51060f0
SH		 3308static void cma_add_one(struct ib_device *device)
3309{
3310 struct cma_device *cma_dev;
3311 struct rdma_id_private *id_priv;
3312
3313 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3314 if (!cma_dev)
3315 return;
3316
3317 cma_dev->device = device;
e51060f0
SH		 3318
3319 init_completion(&cma_dev->comp);
3320 atomic_set(&cma_dev->refcount, 1);
3321 INIT_LIST_HEAD(&cma_dev->id_list);
3322 ib_set_client_data(device, &cma_client, cma_dev);
3323
3324 mutex_lock(&lock);
3325 list_add_tail(&cma_dev->list, &dev_list);
3326 list_for_each_entry(id_priv, &listen_any_list, list)
3327 cma_listen_on_dev(id_priv, cma_dev);
3328 mutex_unlock(&lock);
e51060f0
SH		 3329}
3330
3331static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3332{
a1b1b61f 3333 struct rdma_cm_event event;
550e5ca7 3334 enum rdma_cm_state state;
de910bd9 3335 int ret = 0;
e51060f0
SH		 3336
3337 /* Record that we want to remove the device */
550e5ca7
NM		 3338 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3339 if (state == RDMA_CM_DESTROYING)
e51060f0
SH		 3340 return 0;
3341
3342 cma_cancel_operation(id_priv, state);
de910bd9 3343 mutex_lock(&id_priv->handler_mutex);
e51060f0
SH		 3344
3345 /* Check for destruction from another callback. */
550e5ca7 3346 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
de910bd9 3347 goto out;
e51060f0 3348
a1b1b61f
SH		 3349 memset(&event, 0, sizeof event);
3350 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
de910bd9
OG		 3351 ret = id_priv->id.event_handler(&id_priv->id, &event);
3352out:
3353 mutex_unlock(&id_priv->handler_mutex);
3354 return ret;
e51060f0
SH		 3355}
3356
3357static void cma_process_remove(struct cma_device *cma_dev)
3358{
e51060f0
SH		 3359 struct rdma_id_private *id_priv;
3360 int ret;
3361
e51060f0
SH		 3362 mutex_lock(&lock);
3363 while (!list_empty(&cma_dev->id_list)) {
3364 id_priv = list_entry(cma_dev->id_list.next,
3365 struct rdma_id_private, list);
3366
d02d1f53 3367 list_del(&id_priv->listen_list);
94de178a 3368 list_del_init(&id_priv->list);
e51060f0
SH		 3369 atomic_inc(&id_priv->refcount);
3370 mutex_unlock(&lock);
3371
d02d1f53 3372 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
e51060f0
SH		 3373 cma_deref_id(id_priv);
3374 if (ret)
3375 rdma_destroy_id(&id_priv->id);
3376
3377 mutex_lock(&lock);
3378 }
3379 mutex_unlock(&lock);
3380
3381 cma_deref_dev(cma_dev);
3382 wait_for_completion(&cma_dev->comp);
3383}
3384
3385static void cma_remove_one(struct ib_device *device)
3386{
3387 struct cma_device *cma_dev;
3388
3389 cma_dev = ib_get_client_data(device, &cma_client);
3390 if (!cma_dev)
3391 return;
3392
3393 mutex_lock(&lock);
3394 list_del(&cma_dev->list);
3395 mutex_unlock(&lock);
3396
3397 cma_process_remove(cma_dev);
3398 kfree(cma_dev);
3399}
3400
753f618a
NM		 3401static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3402{
3403 struct nlmsghdr *nlh;
3404 struct rdma_cm_id_stats *id_stats;
3405 struct rdma_id_private *id_priv;
3406 struct rdma_cm_id *id = NULL;
3407 struct cma_device *cma_dev;
3408 int i_dev = 0, i_id = 0;
3409
3410 /*
3411 * We export all of the IDs as a sequence of messages. Each
3412 * ID gets its own netlink message.
3413 */
3414 mutex_lock(&lock);
3415
3416 list_for_each_entry(cma_dev, &dev_list, list) {
3417 if (i_dev < cb->args[0]) {
3418 i_dev++;
3419 continue;
3420 }
3421
3422 i_id = 0;
3423 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3424 if (i_id < cb->args[1]) {
3425 i_id++;
3426 continue;
3427 }
3428
3429 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3430 sizeof *id_stats, RDMA_NL_RDMA_CM,
3431 RDMA_NL_RDMA_CM_ID_STATS);
3432 if (!id_stats)
3433 goto out;
3434
3435 memset(id_stats, 0, sizeof *id_stats);
3436 id = &id_priv->id;
3437 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3438 id_stats->port_num = id->port_num;
3439 id_stats->bound_dev_if =
3440 id->route.addr.dev_addr.bound_dev_if;
3441
3442 if (id->route.addr.src_addr.ss_family == AF_INET) {
3443 if (ibnl_put_attr(skb, nlh,
3444 sizeof(struct sockaddr_in),
3445 &id->route.addr.src_addr,
3446 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3447 goto out;
3448 }
3449 if (ibnl_put_attr(skb, nlh,
3450 sizeof(struct sockaddr_in),
3451 &id->route.addr.dst_addr,
3452 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3453 goto out;
3454 }
3455 } else if (id->route.addr.src_addr.ss_family == AF_INET6) {
3456 if (ibnl_put_attr(skb, nlh,
3457 sizeof(struct sockaddr_in6),
3458 &id->route.addr.src_addr,
3459 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3460 goto out;
3461 }
3462 if (ibnl_put_attr(skb, nlh,
3463 sizeof(struct sockaddr_in6),
3464 &id->route.addr.dst_addr,
3465 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3466 goto out;
3467 }
3468 }
3469
83e9502d 3470 id_stats->pid = id_priv->owner;
753f618a
NM		 3471 id_stats->port_space = id->ps;
3472 id_stats->cm_state = id_priv->state;
3473 id_stats->qp_num = id_priv->qp_num;
3474 id_stats->qp_type = id->qp_type;
3475
3476 i_id++;
3477 }
3478
3479 cb->args[1] = 0;
3480 i_dev++;
3481 }
3482
3483out:
3484 mutex_unlock(&lock);
3485 cb->args[0] = i_dev;
3486 cb->args[1] = i_id;
3487
3488 return skb->len;
3489}
3490
3491static const struct ibnl_client_cbs cma_cb_table[] = {
809d5fc9
G		 3492 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3493 .module = THIS_MODULE },
753f618a
NM		 3494};
3495
716abb1f 3496static int __init cma_init(void)
e51060f0 3497{
5d7220e8 3498 int ret;
227b60f5 3499
c7f743a6 3500 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 3501 if (!cma_wq)
3502 return -ENOMEM;
3503
c1a0b23b 3504 ib_sa_register_client(&sa_client);
7a118df3 3505 rdma_addr_register_client(&addr_client);
dd5bdff8 3506 register_netdevice_notifier(&cma_nb);
c1a0b23b 3507
e51060f0
SH		 3508 ret = ib_register_client(&cma_client);
3509 if (ret)
3510 goto err;
753f618a
NM		 3511
3512 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3513 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3514
e51060f0
SH		 3515 return 0;
3516
3517err:
dd5bdff8 3518 unregister_netdevice_notifier(&cma_nb);
7a118df3 3519 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3520 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3521 destroy_workqueue(cma_wq);
3522 return ret;
3523}
3524
716abb1f 3525static void __exit cma_cleanup(void)
e51060f0 3526{
753f618a 3527 ibnl_remove_client(RDMA_NL_RDMA_CM);
e51060f0 3528 ib_unregister_client(&cma_client);
dd5bdff8 3529 unregister_netdevice_notifier(&cma_nb);
7a118df3 3530 rdma_addr_unregister_client(&addr_client);
c1a0b23b 3531 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 3532 destroy_workqueue(cma_wq);
3533 idr_destroy(&sdp_ps);
3534 idr_destroy(&tcp_ps);
628e5f6d 3535 idr_destroy(&udp_ps);
c8f6a362 3536 idr_destroy(&ipoib_ps);
2d2e9415 3537 idr_destroy(&ib_ps);
e51060f0
SH		 3538}
3539
3540module_init(cma_init);
3541module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)