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Blackfin: bf548-ezkit/bf561-ezkit: update nor flash layout
[zen-stable.git] / drivers / infiniband / core / cma.c
blob99dde874fbbdf53e93675643ac1b1e1bba372bd9
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 *
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:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
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.
25 *
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.
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>
42 #include <linux/inetdevice.h>
43 #include <linux/slab.h>
44
45 #include <net/tcp.h>
46 #include <net/ipv6.h>
47
48 #include <rdma/rdma_cm.h>
49 #include <rdma/rdma_cm_ib.h>
50 #include <rdma/ib_cache.h>
51 #include <rdma/ib_cm.h>
52 #include <rdma/ib_sa.h>
53 #include <rdma/iw_cm.h>
54
55 MODULE_AUTHOR("Sean Hefty");
56 MODULE_DESCRIPTION("Generic RDMA CM Agent");
57 MODULE_LICENSE("Dual BSD/GPL");
58
59 #define CMA_CM_RESPONSE_TIMEOUT 20
60 #define CMA_MAX_CM_RETRIES 15
61 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
62 #define CMA_IBOE_PACKET_LIFETIME 18
63
64 static void cma_add_one(struct ib_device *device);
65 static void cma_remove_one(struct ib_device *device);
66
67 static struct ib_client cma_client = {
68 .name = "cma",
69 .add = cma_add_one,
70 .remove = cma_remove_one
71 };
72
73 static struct ib_sa_client sa_client;
74 static struct rdma_addr_client addr_client;
75 static LIST_HEAD(dev_list);
76 static LIST_HEAD(listen_any_list);
77 static DEFINE_MUTEX(lock);
78 static struct workqueue_struct *cma_wq;
79 static DEFINE_IDR(sdp_ps);
80 static DEFINE_IDR(tcp_ps);
81 static DEFINE_IDR(udp_ps);
82 static DEFINE_IDR(ipoib_ps);
83
84 struct cma_device {
85 struct list_head list;
86 struct ib_device *device;
87 struct completion comp;
88 atomic_t refcount;
89 struct list_head id_list;
90 };
91
92 enum cma_state {
93 CMA_IDLE,
94 CMA_ADDR_QUERY,
95 CMA_ADDR_RESOLVED,
96 CMA_ROUTE_QUERY,
97 CMA_ROUTE_RESOLVED,
98 CMA_CONNECT,
99 CMA_DISCONNECT,
100 CMA_ADDR_BOUND,
101 CMA_LISTEN,
102 CMA_DEVICE_REMOVAL,
103 CMA_DESTROYING
104 };
105
106 struct rdma_bind_list {
107 struct idr *ps;
108 struct hlist_head owners;
109 unsigned short port;
110 };
111
112 /*
113 * Device removal can occur at anytime, so we need extra handling to
114 * serialize notifying the user of device removal with other callbacks.
115 * We do this by disabling removal notification while a callback is in process,
116 * and reporting it after the callback completes.
117 */
118 struct rdma_id_private {
119 struct rdma_cm_id id;
120
121 struct rdma_bind_list *bind_list;
122 struct hlist_node node;
123 struct list_head list; /* listen_any_list or cma_device.list */
124 struct list_head listen_list; /* per device listens */
125 struct cma_device *cma_dev;
126 struct list_head mc_list;
127
128 int internal_id;
129 enum cma_state state;
130 spinlock_t lock;
131 struct mutex qp_mutex;
132
133 struct completion comp;
134 atomic_t refcount;
135 struct mutex handler_mutex;
136
137 int backlog;
138 int timeout_ms;
139 struct ib_sa_query *query;
140 int query_id;
141 union {
142 struct ib_cm_id *ib;
143 struct iw_cm_id *iw;
144 } cm_id;
145
146 u32 seq_num;
147 u32 qkey;
148 u32 qp_num;
149 u8 srq;
150 u8 tos;
151 u8 reuseaddr;
152 };
153
154 struct cma_multicast {
155 struct rdma_id_private *id_priv;
156 union {
157 struct ib_sa_multicast *ib;
158 } multicast;
159 struct list_head list;
160 void *context;
161 struct sockaddr_storage addr;
162 struct kref mcref;
163 };
164
165 struct cma_work {
166 struct work_struct work;
167 struct rdma_id_private *id;
168 enum cma_state old_state;
169 enum cma_state new_state;
170 struct rdma_cm_event event;
171 };
172
173 struct cma_ndev_work {
174 struct work_struct work;
175 struct rdma_id_private *id;
176 struct rdma_cm_event event;
177 };
178
179 struct iboe_mcast_work {
180 struct work_struct work;
181 struct rdma_id_private *id;
182 struct cma_multicast *mc;
183 };
184
185 union cma_ip_addr {
186 struct in6_addr ip6;
187 struct {
188 __be32 pad[3];
189 __be32 addr;
190 } ip4;
191 };
192
193 struct cma_hdr {
194 u8 cma_version;
195 u8 ip_version; /* IP version: 7:4 */
196 __be16 port;
197 union cma_ip_addr src_addr;
198 union cma_ip_addr dst_addr;
199 };
200
201 struct sdp_hh {
202 u8 bsdh[16];
203 u8 sdp_version; /* Major version: 7:4 */
204 u8 ip_version; /* IP version: 7:4 */
205 u8 sdp_specific1[10];
206 __be16 port;
207 __be16 sdp_specific2;
208 union cma_ip_addr src_addr;
209 union cma_ip_addr dst_addr;
210 };
211
212 struct sdp_hah {
213 u8 bsdh[16];
214 u8 sdp_version;
215 };
216
217 #define CMA_VERSION 0x00
218 #define SDP_MAJ_VERSION 0x2
219
220 static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
221 {
222 unsigned long flags;
223 int ret;
224
225 spin_lock_irqsave(&id_priv->lock, flags);
226 ret = (id_priv->state == comp);
227 spin_unlock_irqrestore(&id_priv->lock, flags);
228 return ret;
229 }
230
231 static int cma_comp_exch(struct rdma_id_private *id_priv,
232 enum cma_state comp, enum cma_state exch)
233 {
234 unsigned long flags;
235 int ret;
236
237 spin_lock_irqsave(&id_priv->lock, flags);
238 if ((ret = (id_priv->state == comp)))
239 id_priv->state = exch;
240 spin_unlock_irqrestore(&id_priv->lock, flags);
241 return ret;
242 }
243
244 static enum cma_state cma_exch(struct rdma_id_private *id_priv,
245 enum cma_state exch)
246 {
247 unsigned long flags;
248 enum cma_state old;
249
250 spin_lock_irqsave(&id_priv->lock, flags);
251 old = id_priv->state;
252 id_priv->state = exch;
253 spin_unlock_irqrestore(&id_priv->lock, flags);
254 return old;
255 }
256
257 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
258 {
259 return hdr->ip_version >> 4;
260 }
261
262 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
263 {
264 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
265 }
266
267 static inline u8 sdp_get_majv(u8 sdp_version)
268 {
269 return sdp_version >> 4;
270 }
271
272 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
273 {
274 return hh->ip_version >> 4;
275 }
276
277 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
278 {
279 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
280 }
281
282 static inline int cma_is_ud_ps(enum rdma_port_space ps)
283 {
284 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
285 }
286
287 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
288 struct cma_device *cma_dev)
289 {
290 atomic_inc(&cma_dev->refcount);
291 id_priv->cma_dev = cma_dev;
292 id_priv->id.device = cma_dev->device;
293 id_priv->id.route.addr.dev_addr.transport =
294 rdma_node_get_transport(cma_dev->device->node_type);
295 list_add_tail(&id_priv->list, &cma_dev->id_list);
296 }
297
298 static inline void cma_deref_dev(struct cma_device *cma_dev)
299 {
300 if (atomic_dec_and_test(&cma_dev->refcount))
301 complete(&cma_dev->comp);
302 }
303
304 static inline void release_mc(struct kref *kref)
305 {
306 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
307
308 kfree(mc->multicast.ib);
309 kfree(mc);
310 }
311
312 static void cma_release_dev(struct rdma_id_private *id_priv)
313 {
314 mutex_lock(&lock);
315 list_del(&id_priv->list);
316 cma_deref_dev(id_priv->cma_dev);
317 id_priv->cma_dev = NULL;
318 mutex_unlock(&lock);
319 }
320
321 static int cma_set_qkey(struct rdma_id_private *id_priv)
322 {
323 struct ib_sa_mcmember_rec rec;
324 int ret = 0;
325
326 if (id_priv->qkey)
327 return 0;
328
329 switch (id_priv->id.ps) {
330 case RDMA_PS_UDP:
331 id_priv->qkey = RDMA_UDP_QKEY;
332 break;
333 case RDMA_PS_IPOIB:
334 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
335 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
336 id_priv->id.port_num, &rec.mgid,
337 &rec);
338 if (!ret)
339 id_priv->qkey = be32_to_cpu(rec.qkey);
340 break;
341 default:
342 break;
343 }
344 return ret;
345 }
346
347 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
348 {
349 int i;
350 int err;
351 struct ib_port_attr props;
352 union ib_gid tmp;
353
354 err = ib_query_port(device, port_num, &props);
355 if (err)
356 return 1;
357
358 for (i = 0; i < props.gid_tbl_len; ++i) {
359 err = ib_query_gid(device, port_num, i, &tmp);
360 if (err)
361 return 1;
362 if (!memcmp(&tmp, gid, sizeof tmp))
363 return 0;
364 }
365
366 return -EAGAIN;
367 }
368
369 static int cma_acquire_dev(struct rdma_id_private *id_priv)
370 {
371 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
372 struct cma_device *cma_dev;
373 union ib_gid gid, iboe_gid;
374 int ret = -ENODEV;
375 u8 port;
376 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
377 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
378
379 mutex_lock(&lock);
380 iboe_addr_get_sgid(dev_addr, &iboe_gid);
381 memcpy(&gid, dev_addr->src_dev_addr +
382 rdma_addr_gid_offset(dev_addr), sizeof gid);
383 list_for_each_entry(cma_dev, &dev_list, list) {
384 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
385 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
386 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
387 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
388 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
389 else
390 ret = find_gid_port(cma_dev->device, &gid, port);
391
392 if (!ret) {
393 id_priv->id.port_num = port;
394 goto out;
395 } else if (ret == 1)
396 break;
397 }
398 }
399 }
400
401 out:
402 if (!ret)
403 cma_attach_to_dev(id_priv, cma_dev);
404
405 mutex_unlock(&lock);
406 return ret;
407 }
408
409 static void cma_deref_id(struct rdma_id_private *id_priv)
410 {
411 if (atomic_dec_and_test(&id_priv->refcount))
412 complete(&id_priv->comp);
413 }
414
415 static int cma_disable_callback(struct rdma_id_private *id_priv,
416 enum cma_state state)
417 {
418 mutex_lock(&id_priv->handler_mutex);
419 if (id_priv->state != state) {
420 mutex_unlock(&id_priv->handler_mutex);
421 return -EINVAL;
422 }
423 return 0;
424 }
425
426 static int cma_has_cm_dev(struct rdma_id_private *id_priv)
427 {
428 return (id_priv->id.device && id_priv->cm_id.ib);
429 }
430
431 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
432 void *context, enum rdma_port_space ps)
433 {
434 struct rdma_id_private *id_priv;
435
436 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
437 if (!id_priv)
438 return ERR_PTR(-ENOMEM);
439
440 id_priv->state = CMA_IDLE;
441 id_priv->id.context = context;
442 id_priv->id.event_handler = event_handler;
443 id_priv->id.ps = ps;
444 spin_lock_init(&id_priv->lock);
445 mutex_init(&id_priv->qp_mutex);
446 init_completion(&id_priv->comp);
447 atomic_set(&id_priv->refcount, 1);
448 mutex_init(&id_priv->handler_mutex);
449 INIT_LIST_HEAD(&id_priv->listen_list);
450 INIT_LIST_HEAD(&id_priv->mc_list);
451 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
452
453 return &id_priv->id;
454 }
455 EXPORT_SYMBOL(rdma_create_id);
456
457 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
458 {
459 struct ib_qp_attr qp_attr;
460 int qp_attr_mask, ret;
461
462 qp_attr.qp_state = IB_QPS_INIT;
463 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
464 if (ret)
465 return ret;
466
467 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
468 if (ret)
469 return ret;
470
471 qp_attr.qp_state = IB_QPS_RTR;
472 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
473 if (ret)
474 return ret;
475
476 qp_attr.qp_state = IB_QPS_RTS;
477 qp_attr.sq_psn = 0;
478 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
479
480 return ret;
481 }
482
483 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
484 {
485 struct ib_qp_attr qp_attr;
486 int qp_attr_mask, ret;
487
488 qp_attr.qp_state = IB_QPS_INIT;
489 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
490 if (ret)
491 return ret;
492
493 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
494 }
495
496 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
497 struct ib_qp_init_attr *qp_init_attr)
498 {
499 struct rdma_id_private *id_priv;
500 struct ib_qp *qp;
501 int ret;
502
503 id_priv = container_of(id, struct rdma_id_private, id);
504 if (id->device != pd->device)
505 return -EINVAL;
506
507 qp = ib_create_qp(pd, qp_init_attr);
508 if (IS_ERR(qp))
509 return PTR_ERR(qp);
510
511 if (cma_is_ud_ps(id_priv->id.ps))
512 ret = cma_init_ud_qp(id_priv, qp);
513 else
514 ret = cma_init_conn_qp(id_priv, qp);
515 if (ret)
516 goto err;
517
518 id->qp = qp;
519 id_priv->qp_num = qp->qp_num;
520 id_priv->srq = (qp->srq != NULL);
521 return 0;
522 err:
523 ib_destroy_qp(qp);
524 return ret;
525 }
526 EXPORT_SYMBOL(rdma_create_qp);
527
528 void rdma_destroy_qp(struct rdma_cm_id *id)
529 {
530 struct rdma_id_private *id_priv;
531
532 id_priv = container_of(id, struct rdma_id_private, id);
533 mutex_lock(&id_priv->qp_mutex);
534 ib_destroy_qp(id_priv->id.qp);
535 id_priv->id.qp = NULL;
536 mutex_unlock(&id_priv->qp_mutex);
537 }
538 EXPORT_SYMBOL(rdma_destroy_qp);
539
540 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
541 struct rdma_conn_param *conn_param)
542 {
543 struct ib_qp_attr qp_attr;
544 int qp_attr_mask, ret;
545
546 mutex_lock(&id_priv->qp_mutex);
547 if (!id_priv->id.qp) {
548 ret = 0;
549 goto out;
550 }
551
552 /* Need to update QP attributes from default values. */
553 qp_attr.qp_state = IB_QPS_INIT;
554 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
555 if (ret)
556 goto out;
557
558 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
559 if (ret)
560 goto out;
561
562 qp_attr.qp_state = IB_QPS_RTR;
563 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
564 if (ret)
565 goto out;
566
567 if (conn_param)
568 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
569 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
570 out:
571 mutex_unlock(&id_priv->qp_mutex);
572 return ret;
573 }
574
575 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
576 struct rdma_conn_param *conn_param)
577 {
578 struct ib_qp_attr qp_attr;
579 int qp_attr_mask, ret;
580
581 mutex_lock(&id_priv->qp_mutex);
582 if (!id_priv->id.qp) {
583 ret = 0;
584 goto out;
585 }
586
587 qp_attr.qp_state = IB_QPS_RTS;
588 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
589 if (ret)
590 goto out;
591
592 if (conn_param)
593 qp_attr.max_rd_atomic = conn_param->initiator_depth;
594 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
595 out:
596 mutex_unlock(&id_priv->qp_mutex);
597 return ret;
598 }
599
600 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
601 {
602 struct ib_qp_attr qp_attr;
603 int ret;
604
605 mutex_lock(&id_priv->qp_mutex);
606 if (!id_priv->id.qp) {
607 ret = 0;
608 goto out;
609 }
610
611 qp_attr.qp_state = IB_QPS_ERR;
612 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
613 out:
614 mutex_unlock(&id_priv->qp_mutex);
615 return ret;
616 }
617
618 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
619 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
620 {
621 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
622 int ret;
623 u16 pkey;
624
625 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
626 IB_LINK_LAYER_INFINIBAND)
627 pkey = ib_addr_get_pkey(dev_addr);
628 else
629 pkey = 0xffff;
630
631 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
632 pkey, &qp_attr->pkey_index);
633 if (ret)
634 return ret;
635
636 qp_attr->port_num = id_priv->id.port_num;
637 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
638
639 if (cma_is_ud_ps(id_priv->id.ps)) {
640 ret = cma_set_qkey(id_priv);
641 if (ret)
642 return ret;
643
644 qp_attr->qkey = id_priv->qkey;
645 *qp_attr_mask |= IB_QP_QKEY;
646 } else {
647 qp_attr->qp_access_flags = 0;
648 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
649 }
650 return 0;
651 }
652
653 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
654 int *qp_attr_mask)
655 {
656 struct rdma_id_private *id_priv;
657 int ret = 0;
658
659 id_priv = container_of(id, struct rdma_id_private, id);
660 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
661 case RDMA_TRANSPORT_IB:
662 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
663 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
664 else
665 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
666 qp_attr_mask);
667 if (qp_attr->qp_state == IB_QPS_RTR)
668 qp_attr->rq_psn = id_priv->seq_num;
669 break;
670 case RDMA_TRANSPORT_IWARP:
671 if (!id_priv->cm_id.iw) {
672 qp_attr->qp_access_flags = 0;
673 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
674 } else
675 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
676 qp_attr_mask);
677 break;
678 default:
679 ret = -ENOSYS;
680 break;
681 }
682
683 return ret;
684 }
685 EXPORT_SYMBOL(rdma_init_qp_attr);
686
687 static inline int cma_zero_addr(struct sockaddr *addr)
688 {
689 struct in6_addr *ip6;
690
691 if (addr->sa_family == AF_INET)
692 return ipv4_is_zeronet(
693 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
694 else {
695 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
696 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
697 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
698 }
699 }
700
701 static inline int cma_loopback_addr(struct sockaddr *addr)
702 {
703 if (addr->sa_family == AF_INET)
704 return ipv4_is_loopback(
705 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
706 else
707 return ipv6_addr_loopback(
708 &((struct sockaddr_in6 *) addr)->sin6_addr);
709 }
710
711 static inline int cma_any_addr(struct sockaddr *addr)
712 {
713 return cma_zero_addr(addr) || cma_loopback_addr(addr);
714 }
715
716 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
717 {
718 if (src->sa_family != dst->sa_family)
719 return -1;
720
721 switch (src->sa_family) {
722 case AF_INET:
723 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
724 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
725 default:
726 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
727 &((struct sockaddr_in6 *) dst)->sin6_addr);
728 }
729 }
730
731 static inline __be16 cma_port(struct sockaddr *addr)
732 {
733 if (addr->sa_family == AF_INET)
734 return ((struct sockaddr_in *) addr)->sin_port;
735 else
736 return ((struct sockaddr_in6 *) addr)->sin6_port;
737 }
738
739 static inline int cma_any_port(struct sockaddr *addr)
740 {
741 return !cma_port(addr);
742 }
743
744 static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
745 u8 *ip_ver, __be16 *port,
746 union cma_ip_addr **src, union cma_ip_addr **dst)
747 {
748 switch (ps) {
749 case RDMA_PS_SDP:
750 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
751 SDP_MAJ_VERSION)
752 return -EINVAL;
753
754 *ip_ver = sdp_get_ip_ver(hdr);
755 *port = ((struct sdp_hh *) hdr)->port;
756 *src = &((struct sdp_hh *) hdr)->src_addr;
757 *dst = &((struct sdp_hh *) hdr)->dst_addr;
758 break;
759 default:
760 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
761 return -EINVAL;
762
763 *ip_ver = cma_get_ip_ver(hdr);
764 *port = ((struct cma_hdr *) hdr)->port;
765 *src = &((struct cma_hdr *) hdr)->src_addr;
766 *dst = &((struct cma_hdr *) hdr)->dst_addr;
767 break;
768 }
769
770 if (*ip_ver != 4 && *ip_ver != 6)
771 return -EINVAL;
772 return 0;
773 }
774
775 static void cma_save_net_info(struct rdma_addr *addr,
776 struct rdma_addr *listen_addr,
777 u8 ip_ver, __be16 port,
778 union cma_ip_addr *src, union cma_ip_addr *dst)
779 {
780 struct sockaddr_in *listen4, *ip4;
781 struct sockaddr_in6 *listen6, *ip6;
782
783 switch (ip_ver) {
784 case 4:
785 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
786 ip4 = (struct sockaddr_in *) &addr->src_addr;
787 ip4->sin_family = listen4->sin_family;
788 ip4->sin_addr.s_addr = dst->ip4.addr;
789 ip4->sin_port = listen4->sin_port;
790
791 ip4 = (struct sockaddr_in *) &addr->dst_addr;
792 ip4->sin_family = listen4->sin_family;
793 ip4->sin_addr.s_addr = src->ip4.addr;
794 ip4->sin_port = port;
795 break;
796 case 6:
797 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
798 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
799 ip6->sin6_family = listen6->sin6_family;
800 ip6->sin6_addr = dst->ip6;
801 ip6->sin6_port = listen6->sin6_port;
802
803 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
804 ip6->sin6_family = listen6->sin6_family;
805 ip6->sin6_addr = src->ip6;
806 ip6->sin6_port = port;
807 break;
808 default:
809 break;
810 }
811 }
812
813 static inline int cma_user_data_offset(enum rdma_port_space ps)
814 {
815 switch (ps) {
816 case RDMA_PS_SDP:
817 return 0;
818 default:
819 return sizeof(struct cma_hdr);
820 }
821 }
822
823 static void cma_cancel_route(struct rdma_id_private *id_priv)
824 {
825 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
826 case IB_LINK_LAYER_INFINIBAND:
827 if (id_priv->query)
828 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
829 break;
830 default:
831 break;
832 }
833 }
834
835 static void cma_cancel_listens(struct rdma_id_private *id_priv)
836 {
837 struct rdma_id_private *dev_id_priv;
838
839 /*
840 * Remove from listen_any_list to prevent added devices from spawning
841 * additional listen requests.
842 */
843 mutex_lock(&lock);
844 list_del(&id_priv->list);
845
846 while (!list_empty(&id_priv->listen_list)) {
847 dev_id_priv = list_entry(id_priv->listen_list.next,
848 struct rdma_id_private, listen_list);
849 /* sync with device removal to avoid duplicate destruction */
850 list_del_init(&dev_id_priv->list);
851 list_del(&dev_id_priv->listen_list);
852 mutex_unlock(&lock);
853
854 rdma_destroy_id(&dev_id_priv->id);
855 mutex_lock(&lock);
856 }
857 mutex_unlock(&lock);
858 }
859
860 static void cma_cancel_operation(struct rdma_id_private *id_priv,
861 enum cma_state state)
862 {
863 switch (state) {
864 case CMA_ADDR_QUERY:
865 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
866 break;
867 case CMA_ROUTE_QUERY:
868 cma_cancel_route(id_priv);
869 break;
870 case CMA_LISTEN:
871 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
872 && !id_priv->cma_dev)
873 cma_cancel_listens(id_priv);
874 break;
875 default:
876 break;
877 }
878 }
879
880 static void cma_release_port(struct rdma_id_private *id_priv)
881 {
882 struct rdma_bind_list *bind_list = id_priv->bind_list;
883
884 if (!bind_list)
885 return;
886
887 mutex_lock(&lock);
888 hlist_del(&id_priv->node);
889 if (hlist_empty(&bind_list->owners)) {
890 idr_remove(bind_list->ps, bind_list->port);
891 kfree(bind_list);
892 }
893 mutex_unlock(&lock);
894 }
895
896 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
897 {
898 struct cma_multicast *mc;
899
900 while (!list_empty(&id_priv->mc_list)) {
901 mc = container_of(id_priv->mc_list.next,
902 struct cma_multicast, list);
903 list_del(&mc->list);
904 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
905 case IB_LINK_LAYER_INFINIBAND:
906 ib_sa_free_multicast(mc->multicast.ib);
907 kfree(mc);
908 break;
909 case IB_LINK_LAYER_ETHERNET:
910 kref_put(&mc->mcref, release_mc);
911 break;
912 default:
913 break;
914 }
915 }
916 }
917
918 void rdma_destroy_id(struct rdma_cm_id *id)
919 {
920 struct rdma_id_private *id_priv;
921 enum cma_state state;
922
923 id_priv = container_of(id, struct rdma_id_private, id);
924 state = cma_exch(id_priv, CMA_DESTROYING);
925 cma_cancel_operation(id_priv, state);
926
927 /*
928 * Wait for any active callback to finish. New callbacks will find
929 * the id_priv state set to destroying and abort.
930 */
931 mutex_lock(&id_priv->handler_mutex);
932 mutex_unlock(&id_priv->handler_mutex);
933
934 if (id_priv->cma_dev) {
935 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
936 case RDMA_TRANSPORT_IB:
937 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
938 ib_destroy_cm_id(id_priv->cm_id.ib);
939 break;
940 case RDMA_TRANSPORT_IWARP:
941 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
942 iw_destroy_cm_id(id_priv->cm_id.iw);
943 break;
944 default:
945 break;
946 }
947 cma_leave_mc_groups(id_priv);
948 cma_release_dev(id_priv);
949 }
950
951 cma_release_port(id_priv);
952 cma_deref_id(id_priv);
953 wait_for_completion(&id_priv->comp);
954
955 if (id_priv->internal_id)
956 cma_deref_id(id_priv->id.context);
957
958 kfree(id_priv->id.route.path_rec);
959 kfree(id_priv);
960 }
961 EXPORT_SYMBOL(rdma_destroy_id);
962
963 static int cma_rep_recv(struct rdma_id_private *id_priv)
964 {
965 int ret;
966
967 ret = cma_modify_qp_rtr(id_priv, NULL);
968 if (ret)
969 goto reject;
970
971 ret = cma_modify_qp_rts(id_priv, NULL);
972 if (ret)
973 goto reject;
974
975 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
976 if (ret)
977 goto reject;
978
979 return 0;
980 reject:
981 cma_modify_qp_err(id_priv);
982 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
983 NULL, 0, NULL, 0);
984 return ret;
985 }
986
987 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
988 {
989 if (id_priv->id.ps == RDMA_PS_SDP &&
990 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
991 SDP_MAJ_VERSION)
992 return -EINVAL;
993
994 return 0;
995 }
996
997 static void cma_set_rep_event_data(struct rdma_cm_event *event,
998 struct ib_cm_rep_event_param *rep_data,
999 void *private_data)
1000 {
1001 event->param.conn.private_data = private_data;
1002 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1003 event->param.conn.responder_resources = rep_data->responder_resources;
1004 event->param.conn.initiator_depth = rep_data->initiator_depth;
1005 event->param.conn.flow_control = rep_data->flow_control;
1006 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1007 event->param.conn.srq = rep_data->srq;
1008 event->param.conn.qp_num = rep_data->remote_qpn;
1009 }
1010
1011 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1012 {
1013 struct rdma_id_private *id_priv = cm_id->context;
1014 struct rdma_cm_event event;
1015 int ret = 0;
1016
1017 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1018 cma_disable_callback(id_priv, CMA_CONNECT)) ||
1019 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1020 cma_disable_callback(id_priv, CMA_DISCONNECT)))
1021 return 0;
1022
1023 memset(&event, 0, sizeof event);
1024 switch (ib_event->event) {
1025 case IB_CM_REQ_ERROR:
1026 case IB_CM_REP_ERROR:
1027 event.event = RDMA_CM_EVENT_UNREACHABLE;
1028 event.status = -ETIMEDOUT;
1029 break;
1030 case IB_CM_REP_RECEIVED:
1031 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1032 if (event.status)
1033 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1034 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
1035 event.status = cma_rep_recv(id_priv);
1036 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1037 RDMA_CM_EVENT_ESTABLISHED;
1038 } else
1039 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1040 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1041 ib_event->private_data);
1042 break;
1043 case IB_CM_RTU_RECEIVED:
1044 case IB_CM_USER_ESTABLISHED:
1045 event.event = RDMA_CM_EVENT_ESTABLISHED;
1046 break;
1047 case IB_CM_DREQ_ERROR:
1048 event.status = -ETIMEDOUT; /* fall through */
1049 case IB_CM_DREQ_RECEIVED:
1050 case IB_CM_DREP_RECEIVED:
1051 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
1052 goto out;
1053 event.event = RDMA_CM_EVENT_DISCONNECTED;
1054 break;
1055 case IB_CM_TIMEWAIT_EXIT:
1056 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1057 break;
1058 case IB_CM_MRA_RECEIVED:
1059 /* ignore event */
1060 goto out;
1061 case IB_CM_REJ_RECEIVED:
1062 cma_modify_qp_err(id_priv);
1063 event.status = ib_event->param.rej_rcvd.reason;
1064 event.event = RDMA_CM_EVENT_REJECTED;
1065 event.param.conn.private_data = ib_event->private_data;
1066 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1067 break;
1068 default:
1069 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1070 ib_event->event);
1071 goto out;
1072 }
1073
1074 ret = id_priv->id.event_handler(&id_priv->id, &event);
1075 if (ret) {
1076 /* Destroy the CM ID by returning a non-zero value. */
1077 id_priv->cm_id.ib = NULL;
1078 cma_exch(id_priv, CMA_DESTROYING);
1079 mutex_unlock(&id_priv->handler_mutex);
1080 rdma_destroy_id(&id_priv->id);
1081 return ret;
1082 }
1083 out:
1084 mutex_unlock(&id_priv->handler_mutex);
1085 return ret;
1086 }
1087
1088 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1089 struct ib_cm_event *ib_event)
1090 {
1091 struct rdma_id_private *id_priv;
1092 struct rdma_cm_id *id;
1093 struct rdma_route *rt;
1094 union cma_ip_addr *src, *dst;
1095 __be16 port;
1096 u8 ip_ver;
1097 int ret;
1098
1099 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1100 &ip_ver, &port, &src, &dst))
1101 goto err;
1102
1103 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1104 listen_id->ps);
1105 if (IS_ERR(id))
1106 goto err;
1107
1108 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1109 ip_ver, port, src, dst);
1110
1111 rt = &id->route;
1112 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1113 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1114 GFP_KERNEL);
1115 if (!rt->path_rec)
1116 goto destroy_id;
1117
1118 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1119 if (rt->num_paths == 2)
1120 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1121
1122 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1123 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1124 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1125 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1126 } else {
1127 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1128 &rt->addr.dev_addr);
1129 if (ret)
1130 goto destroy_id;
1131 }
1132 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1133
1134 id_priv = container_of(id, struct rdma_id_private, id);
1135 id_priv->state = CMA_CONNECT;
1136 return id_priv;
1137
1138 destroy_id:
1139 rdma_destroy_id(id);
1140 err:
1141 return NULL;
1142 }
1143
1144 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1145 struct ib_cm_event *ib_event)
1146 {
1147 struct rdma_id_private *id_priv;
1148 struct rdma_cm_id *id;
1149 union cma_ip_addr *src, *dst;
1150 __be16 port;
1151 u8 ip_ver;
1152 int ret;
1153
1154 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1155 listen_id->ps);
1156 if (IS_ERR(id))
1157 return NULL;
1158
1159
1160 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1161 &ip_ver, &port, &src, &dst))
1162 goto err;
1163
1164 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1165 ip_ver, port, src, dst);
1166
1167 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1168 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1169 &id->route.addr.dev_addr);
1170 if (ret)
1171 goto err;
1172 }
1173
1174 id_priv = container_of(id, struct rdma_id_private, id);
1175 id_priv->state = CMA_CONNECT;
1176 return id_priv;
1177 err:
1178 rdma_destroy_id(id);
1179 return NULL;
1180 }
1181
1182 static void cma_set_req_event_data(struct rdma_cm_event *event,
1183 struct ib_cm_req_event_param *req_data,
1184 void *private_data, int offset)
1185 {
1186 event->param.conn.private_data = private_data + offset;
1187 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1188 event->param.conn.responder_resources = req_data->responder_resources;
1189 event->param.conn.initiator_depth = req_data->initiator_depth;
1190 event->param.conn.flow_control = req_data->flow_control;
1191 event->param.conn.retry_count = req_data->retry_count;
1192 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1193 event->param.conn.srq = req_data->srq;
1194 event->param.conn.qp_num = req_data->remote_qpn;
1195 }
1196
1197 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1198 {
1199 struct rdma_id_private *listen_id, *conn_id;
1200 struct rdma_cm_event event;
1201 int offset, ret;
1202
1203 listen_id = cm_id->context;
1204 if (cma_disable_callback(listen_id, CMA_LISTEN))
1205 return -ECONNABORTED;
1206
1207 memset(&event, 0, sizeof event);
1208 offset = cma_user_data_offset(listen_id->id.ps);
1209 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1210 if (cma_is_ud_ps(listen_id->id.ps)) {
1211 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1212 event.param.ud.private_data = ib_event->private_data + offset;
1213 event.param.ud.private_data_len =
1214 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1215 } else {
1216 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1217 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1218 ib_event->private_data, offset);
1219 }
1220 if (!conn_id) {
1221 ret = -ENOMEM;
1222 goto out;
1223 }
1224
1225 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1226 ret = cma_acquire_dev(conn_id);
1227 if (ret)
1228 goto release_conn_id;
1229
1230 conn_id->cm_id.ib = cm_id;
1231 cm_id->context = conn_id;
1232 cm_id->cm_handler = cma_ib_handler;
1233
1234 /*
1235 * Protect against the user destroying conn_id from another thread
1236 * until we're done accessing it.
1237 */
1238 atomic_inc(&conn_id->refcount);
1239 ret = conn_id->id.event_handler(&conn_id->id, &event);
1240 if (!ret) {
1241 /*
1242 * Acquire mutex to prevent user executing rdma_destroy_id()
1243 * while we're accessing the cm_id.
1244 */
1245 mutex_lock(&lock);
1246 if (cma_comp(conn_id, CMA_CONNECT) &&
1247 !cma_is_ud_ps(conn_id->id.ps))
1248 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1249 mutex_unlock(&lock);
1250 mutex_unlock(&conn_id->handler_mutex);
1251 cma_deref_id(conn_id);
1252 goto out;
1253 }
1254 cma_deref_id(conn_id);
1255
1256 /* Destroy the CM ID by returning a non-zero value. */
1257 conn_id->cm_id.ib = NULL;
1258
1259 release_conn_id:
1260 cma_exch(conn_id, CMA_DESTROYING);
1261 mutex_unlock(&conn_id->handler_mutex);
1262 rdma_destroy_id(&conn_id->id);
1263
1264 out:
1265 mutex_unlock(&listen_id->handler_mutex);
1266 return ret;
1267 }
1268
1269 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1270 {
1271 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1272 }
1273
1274 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1275 struct ib_cm_compare_data *compare)
1276 {
1277 struct cma_hdr *cma_data, *cma_mask;
1278 struct sdp_hh *sdp_data, *sdp_mask;
1279 __be32 ip4_addr;
1280 struct in6_addr ip6_addr;
1281
1282 memset(compare, 0, sizeof *compare);
1283 cma_data = (void *) compare->data;
1284 cma_mask = (void *) compare->mask;
1285 sdp_data = (void *) compare->data;
1286 sdp_mask = (void *) compare->mask;
1287
1288 switch (addr->sa_family) {
1289 case AF_INET:
1290 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1291 if (ps == RDMA_PS_SDP) {
1292 sdp_set_ip_ver(sdp_data, 4);
1293 sdp_set_ip_ver(sdp_mask, 0xF);
1294 sdp_data->dst_addr.ip4.addr = ip4_addr;
1295 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1296 } else {
1297 cma_set_ip_ver(cma_data, 4);
1298 cma_set_ip_ver(cma_mask, 0xF);
1299 cma_data->dst_addr.ip4.addr = ip4_addr;
1300 cma_mask->dst_addr.ip4.addr = htonl(~0);
1301 }
1302 break;
1303 case AF_INET6:
1304 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1305 if (ps == RDMA_PS_SDP) {
1306 sdp_set_ip_ver(sdp_data, 6);
1307 sdp_set_ip_ver(sdp_mask, 0xF);
1308 sdp_data->dst_addr.ip6 = ip6_addr;
1309 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1310 sizeof sdp_mask->dst_addr.ip6);
1311 } else {
1312 cma_set_ip_ver(cma_data, 6);
1313 cma_set_ip_ver(cma_mask, 0xF);
1314 cma_data->dst_addr.ip6 = ip6_addr;
1315 memset(&cma_mask->dst_addr.ip6, 0xFF,
1316 sizeof cma_mask->dst_addr.ip6);
1317 }
1318 break;
1319 default:
1320 break;
1321 }
1322 }
1323
1324 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1325 {
1326 struct rdma_id_private *id_priv = iw_id->context;
1327 struct rdma_cm_event event;
1328 struct sockaddr_in *sin;
1329 int ret = 0;
1330
1331 if (cma_disable_callback(id_priv, CMA_CONNECT))
1332 return 0;
1333
1334 memset(&event, 0, sizeof event);
1335 switch (iw_event->event) {
1336 case IW_CM_EVENT_CLOSE:
1337 event.event = RDMA_CM_EVENT_DISCONNECTED;
1338 break;
1339 case IW_CM_EVENT_CONNECT_REPLY:
1340 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1341 *sin = iw_event->local_addr;
1342 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1343 *sin = iw_event->remote_addr;
1344 switch (iw_event->status) {
1345 case 0:
1346 event.event = RDMA_CM_EVENT_ESTABLISHED;
1347 break;
1348 case -ECONNRESET:
1349 case -ECONNREFUSED:
1350 event.event = RDMA_CM_EVENT_REJECTED;
1351 break;
1352 case -ETIMEDOUT:
1353 event.event = RDMA_CM_EVENT_UNREACHABLE;
1354 break;
1355 default:
1356 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1357 break;
1358 }
1359 break;
1360 case IW_CM_EVENT_ESTABLISHED:
1361 event.event = RDMA_CM_EVENT_ESTABLISHED;
1362 break;
1363 default:
1364 BUG_ON(1);
1365 }
1366
1367 event.status = iw_event->status;
1368 event.param.conn.private_data = iw_event->private_data;
1369 event.param.conn.private_data_len = iw_event->private_data_len;
1370 ret = id_priv->id.event_handler(&id_priv->id, &event);
1371 if (ret) {
1372 /* Destroy the CM ID by returning a non-zero value. */
1373 id_priv->cm_id.iw = NULL;
1374 cma_exch(id_priv, CMA_DESTROYING);
1375 mutex_unlock(&id_priv->handler_mutex);
1376 rdma_destroy_id(&id_priv->id);
1377 return ret;
1378 }
1379
1380 mutex_unlock(&id_priv->handler_mutex);
1381 return ret;
1382 }
1383
1384 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1385 struct iw_cm_event *iw_event)
1386 {
1387 struct rdma_cm_id *new_cm_id;
1388 struct rdma_id_private *listen_id, *conn_id;
1389 struct sockaddr_in *sin;
1390 struct net_device *dev = NULL;
1391 struct rdma_cm_event event;
1392 int ret;
1393 struct ib_device_attr attr;
1394
1395 listen_id = cm_id->context;
1396 if (cma_disable_callback(listen_id, CMA_LISTEN))
1397 return -ECONNABORTED;
1398
1399 /* Create a new RDMA id for the new IW CM ID */
1400 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1401 listen_id->id.context,
1402 RDMA_PS_TCP);
1403 if (IS_ERR(new_cm_id)) {
1404 ret = -ENOMEM;
1405 goto out;
1406 }
1407 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1408 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1409 conn_id->state = CMA_CONNECT;
1410
1411 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1412 if (!dev) {
1413 ret = -EADDRNOTAVAIL;
1414 mutex_unlock(&conn_id->handler_mutex);
1415 rdma_destroy_id(new_cm_id);
1416 goto out;
1417 }
1418 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1419 if (ret) {
1420 mutex_unlock(&conn_id->handler_mutex);
1421 rdma_destroy_id(new_cm_id);
1422 goto out;
1423 }
1424
1425 ret = cma_acquire_dev(conn_id);
1426 if (ret) {
1427 mutex_unlock(&conn_id->handler_mutex);
1428 rdma_destroy_id(new_cm_id);
1429 goto out;
1430 }
1431
1432 conn_id->cm_id.iw = cm_id;
1433 cm_id->context = conn_id;
1434 cm_id->cm_handler = cma_iw_handler;
1435
1436 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1437 *sin = iw_event->local_addr;
1438 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1439 *sin = iw_event->remote_addr;
1440
1441 ret = ib_query_device(conn_id->id.device, &attr);
1442 if (ret) {
1443 mutex_unlock(&conn_id->handler_mutex);
1444 rdma_destroy_id(new_cm_id);
1445 goto out;
1446 }
1447
1448 memset(&event, 0, sizeof event);
1449 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1450 event.param.conn.private_data = iw_event->private_data;
1451 event.param.conn.private_data_len = iw_event->private_data_len;
1452 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1453 event.param.conn.responder_resources = attr.max_qp_rd_atom;
1454
1455 /*
1456 * Protect against the user destroying conn_id from another thread
1457 * until we're done accessing it.
1458 */
1459 atomic_inc(&conn_id->refcount);
1460 ret = conn_id->id.event_handler(&conn_id->id, &event);
1461 if (ret) {
1462 /* User wants to destroy the CM ID */
1463 conn_id->cm_id.iw = NULL;
1464 cma_exch(conn_id, CMA_DESTROYING);
1465 mutex_unlock(&conn_id->handler_mutex);
1466 cma_deref_id(conn_id);
1467 rdma_destroy_id(&conn_id->id);
1468 goto out;
1469 }
1470
1471 mutex_unlock(&conn_id->handler_mutex);
1472 cma_deref_id(conn_id);
1473
1474 out:
1475 if (dev)
1476 dev_put(dev);
1477 mutex_unlock(&listen_id->handler_mutex);
1478 return ret;
1479 }
1480
1481 static int cma_ib_listen(struct rdma_id_private *id_priv)
1482 {
1483 struct ib_cm_compare_data compare_data;
1484 struct sockaddr *addr;
1485 __be64 svc_id;
1486 int ret;
1487
1488 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1489 id_priv);
1490 if (IS_ERR(id_priv->cm_id.ib))
1491 return PTR_ERR(id_priv->cm_id.ib);
1492
1493 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1494 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1495 if (cma_any_addr(addr))
1496 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1497 else {
1498 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1499 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1500 }
1501
1502 if (ret) {
1503 ib_destroy_cm_id(id_priv->cm_id.ib);
1504 id_priv->cm_id.ib = NULL;
1505 }
1506
1507 return ret;
1508 }
1509
1510 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1511 {
1512 int ret;
1513 struct sockaddr_in *sin;
1514
1515 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1516 iw_conn_req_handler,
1517 id_priv);
1518 if (IS_ERR(id_priv->cm_id.iw))
1519 return PTR_ERR(id_priv->cm_id.iw);
1520
1521 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1522 id_priv->cm_id.iw->local_addr = *sin;
1523
1524 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1525
1526 if (ret) {
1527 iw_destroy_cm_id(id_priv->cm_id.iw);
1528 id_priv->cm_id.iw = NULL;
1529 }
1530
1531 return ret;
1532 }
1533
1534 static int cma_listen_handler(struct rdma_cm_id *id,
1535 struct rdma_cm_event *event)
1536 {
1537 struct rdma_id_private *id_priv = id->context;
1538
1539 id->context = id_priv->id.context;
1540 id->event_handler = id_priv->id.event_handler;
1541 return id_priv->id.event_handler(id, event);
1542 }
1543
1544 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1545 struct cma_device *cma_dev)
1546 {
1547 struct rdma_id_private *dev_id_priv;
1548 struct rdma_cm_id *id;
1549 int ret;
1550
1551 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1552 if (IS_ERR(id))
1553 return;
1554
1555 dev_id_priv = container_of(id, struct rdma_id_private, id);
1556
1557 dev_id_priv->state = CMA_ADDR_BOUND;
1558 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1559 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1560
1561 cma_attach_to_dev(dev_id_priv, cma_dev);
1562 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1563 atomic_inc(&id_priv->refcount);
1564 dev_id_priv->internal_id = 1;
1565
1566 ret = rdma_listen(id, id_priv->backlog);
1567 if (ret)
1568 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1569 "listening on device %s\n", ret, cma_dev->device->name);
1570 }
1571
1572 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1573 {
1574 struct cma_device *cma_dev;
1575
1576 mutex_lock(&lock);
1577 list_add_tail(&id_priv->list, &listen_any_list);
1578 list_for_each_entry(cma_dev, &dev_list, list)
1579 cma_listen_on_dev(id_priv, cma_dev);
1580 mutex_unlock(&lock);
1581 }
1582
1583 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1584 {
1585 struct rdma_id_private *id_priv;
1586
1587 id_priv = container_of(id, struct rdma_id_private, id);
1588 id_priv->tos = (u8) tos;
1589 }
1590 EXPORT_SYMBOL(rdma_set_service_type);
1591
1592 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1593 void *context)
1594 {
1595 struct cma_work *work = context;
1596 struct rdma_route *route;
1597
1598 route = &work->id->id.route;
1599
1600 if (!status) {
1601 route->num_paths = 1;
1602 *route->path_rec = *path_rec;
1603 } else {
1604 work->old_state = CMA_ROUTE_QUERY;
1605 work->new_state = CMA_ADDR_RESOLVED;
1606 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1607 work->event.status = status;
1608 }
1609
1610 queue_work(cma_wq, &work->work);
1611 }
1612
1613 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1614 struct cma_work *work)
1615 {
1616 struct rdma_addr *addr = &id_priv->id.route.addr;
1617 struct ib_sa_path_rec path_rec;
1618 ib_sa_comp_mask comp_mask;
1619 struct sockaddr_in6 *sin6;
1620
1621 memset(&path_rec, 0, sizeof path_rec);
1622 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1623 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1624 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1625 path_rec.numb_path = 1;
1626 path_rec.reversible = 1;
1627 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1628 (struct sockaddr *) &addr->dst_addr);
1629
1630 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1631 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1632 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1633
1634 if (addr->src_addr.ss_family == AF_INET) {
1635 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1636 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1637 } else {
1638 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1639 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1640 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1641 }
1642
1643 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1644 id_priv->id.port_num, &path_rec,
1645 comp_mask, timeout_ms,
1646 GFP_KERNEL, cma_query_handler,
1647 work, &id_priv->query);
1648
1649 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1650 }
1651
1652 static void cma_work_handler(struct work_struct *_work)
1653 {
1654 struct cma_work *work = container_of(_work, struct cma_work, work);
1655 struct rdma_id_private *id_priv = work->id;
1656 int destroy = 0;
1657
1658 mutex_lock(&id_priv->handler_mutex);
1659 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1660 goto out;
1661
1662 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1663 cma_exch(id_priv, CMA_DESTROYING);
1664 destroy = 1;
1665 }
1666 out:
1667 mutex_unlock(&id_priv->handler_mutex);
1668 cma_deref_id(id_priv);
1669 if (destroy)
1670 rdma_destroy_id(&id_priv->id);
1671 kfree(work);
1672 }
1673
1674 static void cma_ndev_work_handler(struct work_struct *_work)
1675 {
1676 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1677 struct rdma_id_private *id_priv = work->id;
1678 int destroy = 0;
1679
1680 mutex_lock(&id_priv->handler_mutex);
1681 if (id_priv->state == CMA_DESTROYING ||
1682 id_priv->state == CMA_DEVICE_REMOVAL)
1683 goto out;
1684
1685 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1686 cma_exch(id_priv, CMA_DESTROYING);
1687 destroy = 1;
1688 }
1689
1690 out:
1691 mutex_unlock(&id_priv->handler_mutex);
1692 cma_deref_id(id_priv);
1693 if (destroy)
1694 rdma_destroy_id(&id_priv->id);
1695 kfree(work);
1696 }
1697
1698 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1699 {
1700 struct rdma_route *route = &id_priv->id.route;
1701 struct cma_work *work;
1702 int ret;
1703
1704 work = kzalloc(sizeof *work, GFP_KERNEL);
1705 if (!work)
1706 return -ENOMEM;
1707
1708 work->id = id_priv;
1709 INIT_WORK(&work->work, cma_work_handler);
1710 work->old_state = CMA_ROUTE_QUERY;
1711 work->new_state = CMA_ROUTE_RESOLVED;
1712 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1713
1714 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1715 if (!route->path_rec) {
1716 ret = -ENOMEM;
1717 goto err1;
1718 }
1719
1720 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1721 if (ret)
1722 goto err2;
1723
1724 return 0;
1725 err2:
1726 kfree(route->path_rec);
1727 route->path_rec = NULL;
1728 err1:
1729 kfree(work);
1730 return ret;
1731 }
1732
1733 int rdma_set_ib_paths(struct rdma_cm_id *id,
1734 struct ib_sa_path_rec *path_rec, int num_paths)
1735 {
1736 struct rdma_id_private *id_priv;
1737 int ret;
1738
1739 id_priv = container_of(id, struct rdma_id_private, id);
1740 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1741 return -EINVAL;
1742
1743 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1744 GFP_KERNEL);
1745 if (!id->route.path_rec) {
1746 ret = -ENOMEM;
1747 goto err;
1748 }
1749
1750 id->route.num_paths = num_paths;
1751 return 0;
1752 err:
1753 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1754 return ret;
1755 }
1756 EXPORT_SYMBOL(rdma_set_ib_paths);
1757
1758 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1759 {
1760 struct cma_work *work;
1761
1762 work = kzalloc(sizeof *work, GFP_KERNEL);
1763 if (!work)
1764 return -ENOMEM;
1765
1766 work->id = id_priv;
1767 INIT_WORK(&work->work, cma_work_handler);
1768 work->old_state = CMA_ROUTE_QUERY;
1769 work->new_state = CMA_ROUTE_RESOLVED;
1770 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1771 queue_work(cma_wq, &work->work);
1772 return 0;
1773 }
1774
1775 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1776 {
1777 struct rdma_route *route = &id_priv->id.route;
1778 struct rdma_addr *addr = &route->addr;
1779 struct cma_work *work;
1780 int ret;
1781 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1782 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1783 struct net_device *ndev = NULL;
1784 u16 vid;
1785
1786 if (src_addr->sin_family != dst_addr->sin_family)
1787 return -EINVAL;
1788
1789 work = kzalloc(sizeof *work, GFP_KERNEL);
1790 if (!work)
1791 return -ENOMEM;
1792
1793 work->id = id_priv;
1794 INIT_WORK(&work->work, cma_work_handler);
1795
1796 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1797 if (!route->path_rec) {
1798 ret = -ENOMEM;
1799 goto err1;
1800 }
1801
1802 route->num_paths = 1;
1803
1804 if (addr->dev_addr.bound_dev_if)
1805 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1806 if (!ndev) {
1807 ret = -ENODEV;
1808 goto err2;
1809 }
1810
1811 vid = rdma_vlan_dev_vlan_id(ndev);
1812
1813 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1814 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1815
1816 route->path_rec->hop_limit = 1;
1817 route->path_rec->reversible = 1;
1818 route->path_rec->pkey = cpu_to_be16(0xffff);
1819 route->path_rec->mtu_selector = IB_SA_EQ;
1820 route->path_rec->sl = id_priv->tos >> 5;
1821
1822 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1823 route->path_rec->rate_selector = IB_SA_EQ;
1824 route->path_rec->rate = iboe_get_rate(ndev);
1825 dev_put(ndev);
1826 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1827 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1828 if (!route->path_rec->mtu) {
1829 ret = -EINVAL;
1830 goto err2;
1831 }
1832
1833 work->old_state = CMA_ROUTE_QUERY;
1834 work->new_state = CMA_ROUTE_RESOLVED;
1835 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1836 work->event.status = 0;
1837
1838 queue_work(cma_wq, &work->work);
1839
1840 return 0;
1841
1842 err2:
1843 kfree(route->path_rec);
1844 route->path_rec = NULL;
1845 err1:
1846 kfree(work);
1847 return ret;
1848 }
1849
1850 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1851 {
1852 struct rdma_id_private *id_priv;
1853 int ret;
1854
1855 id_priv = container_of(id, struct rdma_id_private, id);
1856 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1857 return -EINVAL;
1858
1859 atomic_inc(&id_priv->refcount);
1860 switch (rdma_node_get_transport(id->device->node_type)) {
1861 case RDMA_TRANSPORT_IB:
1862 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1863 case IB_LINK_LAYER_INFINIBAND:
1864 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1865 break;
1866 case IB_LINK_LAYER_ETHERNET:
1867 ret = cma_resolve_iboe_route(id_priv);
1868 break;
1869 default:
1870 ret = -ENOSYS;
1871 }
1872 break;
1873 case RDMA_TRANSPORT_IWARP:
1874 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1875 break;
1876 default:
1877 ret = -ENOSYS;
1878 break;
1879 }
1880 if (ret)
1881 goto err;
1882
1883 return 0;
1884 err:
1885 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1886 cma_deref_id(id_priv);
1887 return ret;
1888 }
1889 EXPORT_SYMBOL(rdma_resolve_route);
1890
1891 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1892 {
1893 struct cma_device *cma_dev;
1894 struct ib_port_attr port_attr;
1895 union ib_gid gid;
1896 u16 pkey;
1897 int ret;
1898 u8 p;
1899
1900 mutex_lock(&lock);
1901 if (list_empty(&dev_list)) {
1902 ret = -ENODEV;
1903 goto out;
1904 }
1905 list_for_each_entry(cma_dev, &dev_list, list)
1906 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1907 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1908 port_attr.state == IB_PORT_ACTIVE)
1909 goto port_found;
1910
1911 p = 1;
1912 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1913
1914 port_found:
1915 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1916 if (ret)
1917 goto out;
1918
1919 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1920 if (ret)
1921 goto out;
1922
1923 id_priv->id.route.addr.dev_addr.dev_type =
1924 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1925 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1926
1927 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1928 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1929 id_priv->id.port_num = p;
1930 cma_attach_to_dev(id_priv, cma_dev);
1931 out:
1932 mutex_unlock(&lock);
1933 return ret;
1934 }
1935
1936 static void addr_handler(int status, struct sockaddr *src_addr,
1937 struct rdma_dev_addr *dev_addr, void *context)
1938 {
1939 struct rdma_id_private *id_priv = context;
1940 struct rdma_cm_event event;
1941
1942 memset(&event, 0, sizeof event);
1943 mutex_lock(&id_priv->handler_mutex);
1944 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED))
1945 goto out;
1946
1947 if (!status && !id_priv->cma_dev)
1948 status = cma_acquire_dev(id_priv);
1949
1950 if (status) {
1951 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
1952 goto out;
1953 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1954 event.status = status;
1955 } else {
1956 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1957 ip_addr_size(src_addr));
1958 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1959 }
1960
1961 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1962 cma_exch(id_priv, CMA_DESTROYING);
1963 mutex_unlock(&id_priv->handler_mutex);
1964 cma_deref_id(id_priv);
1965 rdma_destroy_id(&id_priv->id);
1966 return;
1967 }
1968 out:
1969 mutex_unlock(&id_priv->handler_mutex);
1970 cma_deref_id(id_priv);
1971 }
1972
1973 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1974 {
1975 struct cma_work *work;
1976 struct sockaddr *src, *dst;
1977 union ib_gid gid;
1978 int ret;
1979
1980 work = kzalloc(sizeof *work, GFP_KERNEL);
1981 if (!work)
1982 return -ENOMEM;
1983
1984 if (!id_priv->cma_dev) {
1985 ret = cma_bind_loopback(id_priv);
1986 if (ret)
1987 goto err;
1988 }
1989
1990 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1991 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
1992
1993 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1994 if (cma_zero_addr(src)) {
1995 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
1996 if ((src->sa_family = dst->sa_family) == AF_INET) {
1997 ((struct sockaddr_in *) src)->sin_addr.s_addr =
1998 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1999 } else {
2000 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
2001 &((struct sockaddr_in6 *) dst)->sin6_addr);
2002 }
2003 }
2004
2005 work->id = id_priv;
2006 INIT_WORK(&work->work, cma_work_handler);
2007 work->old_state = CMA_ADDR_QUERY;
2008 work->new_state = CMA_ADDR_RESOLVED;
2009 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2010 queue_work(cma_wq, &work->work);
2011 return 0;
2012 err:
2013 kfree(work);
2014 return ret;
2015 }
2016
2017 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2018 struct sockaddr *dst_addr)
2019 {
2020 if (!src_addr || !src_addr->sa_family) {
2021 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2022 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2023 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2024 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2025 }
2026 }
2027 return rdma_bind_addr(id, src_addr);
2028 }
2029
2030 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2031 struct sockaddr *dst_addr, int timeout_ms)
2032 {
2033 struct rdma_id_private *id_priv;
2034 int ret;
2035
2036 id_priv = container_of(id, struct rdma_id_private, id);
2037 if (id_priv->state == CMA_IDLE) {
2038 ret = cma_bind_addr(id, src_addr, dst_addr);
2039 if (ret)
2040 return ret;
2041 }
2042
2043 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
2044 return -EINVAL;
2045
2046 atomic_inc(&id_priv->refcount);
2047 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2048 if (cma_any_addr(dst_addr))
2049 ret = cma_resolve_loopback(id_priv);
2050 else
2051 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2052 dst_addr, &id->route.addr.dev_addr,
2053 timeout_ms, addr_handler, id_priv);
2054 if (ret)
2055 goto err;
2056
2057 return 0;
2058 err:
2059 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
2060 cma_deref_id(id_priv);
2061 return ret;
2062 }
2063 EXPORT_SYMBOL(rdma_resolve_addr);
2064
2065 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2066 {
2067 struct rdma_id_private *id_priv;
2068 unsigned long flags;
2069 int ret;
2070
2071 id_priv = container_of(id, struct rdma_id_private, id);
2072 spin_lock_irqsave(&id_priv->lock, flags);
2073 if (id_priv->state == CMA_IDLE) {
2074 id_priv->reuseaddr = reuse;
2075 ret = 0;
2076 } else {
2077 ret = -EINVAL;
2078 }
2079 spin_unlock_irqrestore(&id_priv->lock, flags);
2080 return ret;
2081 }
2082 EXPORT_SYMBOL(rdma_set_reuseaddr);
2083
2084 static void cma_bind_port(struct rdma_bind_list *bind_list,
2085 struct rdma_id_private *id_priv)
2086 {
2087 struct sockaddr_in *sin;
2088
2089 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2090 sin->sin_port = htons(bind_list->port);
2091 id_priv->bind_list = bind_list;
2092 hlist_add_head(&id_priv->node, &bind_list->owners);
2093 }
2094
2095 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2096 unsigned short snum)
2097 {
2098 struct rdma_bind_list *bind_list;
2099 int port, ret;
2100
2101 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2102 if (!bind_list)
2103 return -ENOMEM;
2104
2105 do {
2106 ret = idr_get_new_above(ps, bind_list, snum, &port);
2107 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2108
2109 if (ret)
2110 goto err1;
2111
2112 if (port != snum) {
2113 ret = -EADDRNOTAVAIL;
2114 goto err2;
2115 }
2116
2117 bind_list->ps = ps;
2118 bind_list->port = (unsigned short) port;
2119 cma_bind_port(bind_list, id_priv);
2120 return 0;
2121 err2:
2122 idr_remove(ps, port);
2123 err1:
2124 kfree(bind_list);
2125 return ret;
2126 }
2127
2128 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2129 {
2130 static unsigned int last_used_port;
2131 int low, high, remaining;
2132 unsigned int rover;
2133
2134 inet_get_local_port_range(&low, &high);
2135 remaining = (high - low) + 1;
2136 rover = net_random() % remaining + low;
2137 retry:
2138 if (last_used_port != rover &&
2139 !idr_find(ps, (unsigned short) rover)) {
2140 int ret = cma_alloc_port(ps, id_priv, rover);
2141 /*
2142 * Remember previously used port number in order to avoid
2143 * re-using same port immediately after it is closed.
2144 */
2145 if (!ret)
2146 last_used_port = rover;
2147 if (ret != -EADDRNOTAVAIL)
2148 return ret;
2149 }
2150 if (--remaining) {
2151 rover++;
2152 if ((rover < low) || (rover > high))
2153 rover = low;
2154 goto retry;
2155 }
2156 return -EADDRNOTAVAIL;
2157 }
2158
2159 /*
2160 * Check that the requested port is available. This is called when trying to
2161 * bind to a specific port, or when trying to listen on a bound port. In
2162 * the latter case, the provided id_priv may already be on the bind_list, but
2163 * we still need to check that it's okay to start listening.
2164 */
2165 static int cma_check_port(struct rdma_bind_list *bind_list,
2166 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2167 {
2168 struct rdma_id_private *cur_id;
2169 struct sockaddr *addr, *cur_addr;
2170 struct hlist_node *node;
2171
2172 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2173 if (cma_any_addr(addr) && !reuseaddr)
2174 return -EADDRNOTAVAIL;
2175
2176 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2177 if (id_priv == cur_id)
2178 continue;
2179
2180 if ((cur_id->state == CMA_LISTEN) ||
2181 !reuseaddr || !cur_id->reuseaddr) {
2182 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2183 if (cma_any_addr(cur_addr))
2184 return -EADDRNOTAVAIL;
2185
2186 if (!cma_addr_cmp(addr, cur_addr))
2187 return -EADDRINUSE;
2188 }
2189 }
2190 return 0;
2191 }
2192
2193 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2194 {
2195 struct rdma_bind_list *bind_list;
2196 unsigned short snum;
2197 int ret;
2198
2199 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2200 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2201 return -EACCES;
2202
2203 bind_list = idr_find(ps, snum);
2204 if (!bind_list) {
2205 ret = cma_alloc_port(ps, id_priv, snum);
2206 } else {
2207 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2208 if (!ret)
2209 cma_bind_port(bind_list, id_priv);
2210 }
2211 return ret;
2212 }
2213
2214 static int cma_bind_listen(struct rdma_id_private *id_priv)
2215 {
2216 struct rdma_bind_list *bind_list = id_priv->bind_list;
2217 int ret = 0;
2218
2219 mutex_lock(&lock);
2220 if (bind_list->owners.first->next)
2221 ret = cma_check_port(bind_list, id_priv, 0);
2222 mutex_unlock(&lock);
2223 return ret;
2224 }
2225
2226 static int cma_get_port(struct rdma_id_private *id_priv)
2227 {
2228 struct idr *ps;
2229 int ret;
2230
2231 switch (id_priv->id.ps) {
2232 case RDMA_PS_SDP:
2233 ps = &sdp_ps;
2234 break;
2235 case RDMA_PS_TCP:
2236 ps = &tcp_ps;
2237 break;
2238 case RDMA_PS_UDP:
2239 ps = &udp_ps;
2240 break;
2241 case RDMA_PS_IPOIB:
2242 ps = &ipoib_ps;
2243 break;
2244 default:
2245 return -EPROTONOSUPPORT;
2246 }
2247
2248 mutex_lock(&lock);
2249 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2250 ret = cma_alloc_any_port(ps, id_priv);
2251 else
2252 ret = cma_use_port(ps, id_priv);
2253 mutex_unlock(&lock);
2254
2255 return ret;
2256 }
2257
2258 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2259 struct sockaddr *addr)
2260 {
2261 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2262 struct sockaddr_in6 *sin6;
2263
2264 if (addr->sa_family != AF_INET6)
2265 return 0;
2266
2267 sin6 = (struct sockaddr_in6 *) addr;
2268 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2269 !sin6->sin6_scope_id)
2270 return -EINVAL;
2271
2272 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2273 #endif
2274 return 0;
2275 }
2276
2277 int rdma_listen(struct rdma_cm_id *id, int backlog)
2278 {
2279 struct rdma_id_private *id_priv;
2280 int ret;
2281
2282 id_priv = container_of(id, struct rdma_id_private, id);
2283 if (id_priv->state == CMA_IDLE) {
2284 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2285 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2286 if (ret)
2287 return ret;
2288 }
2289
2290 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
2291 return -EINVAL;
2292
2293 if (id_priv->reuseaddr) {
2294 ret = cma_bind_listen(id_priv);
2295 if (ret)
2296 goto err;
2297 }
2298
2299 id_priv->backlog = backlog;
2300 if (id->device) {
2301 switch (rdma_node_get_transport(id->device->node_type)) {
2302 case RDMA_TRANSPORT_IB:
2303 ret = cma_ib_listen(id_priv);
2304 if (ret)
2305 goto err;
2306 break;
2307 case RDMA_TRANSPORT_IWARP:
2308 ret = cma_iw_listen(id_priv, backlog);
2309 if (ret)
2310 goto err;
2311 break;
2312 default:
2313 ret = -ENOSYS;
2314 goto err;
2315 }
2316 } else
2317 cma_listen_on_all(id_priv);
2318
2319 return 0;
2320 err:
2321 id_priv->backlog = 0;
2322 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
2323 return ret;
2324 }
2325 EXPORT_SYMBOL(rdma_listen);
2326
2327 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2328 {
2329 struct rdma_id_private *id_priv;
2330 int ret;
2331
2332 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2333 return -EAFNOSUPPORT;
2334
2335 id_priv = container_of(id, struct rdma_id_private, id);
2336 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2337 return -EINVAL;
2338
2339 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2340 if (ret)
2341 goto err1;
2342
2343 if (!cma_any_addr(addr)) {
2344 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2345 if (ret)
2346 goto err1;
2347
2348 ret = cma_acquire_dev(id_priv);
2349 if (ret)
2350 goto err1;
2351 }
2352
2353 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2354 ret = cma_get_port(id_priv);
2355 if (ret)
2356 goto err2;
2357
2358 return 0;
2359 err2:
2360 if (id_priv->cma_dev)
2361 cma_release_dev(id_priv);
2362 err1:
2363 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2364 return ret;
2365 }
2366 EXPORT_SYMBOL(rdma_bind_addr);
2367
2368 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2369 struct rdma_route *route)
2370 {
2371 struct cma_hdr *cma_hdr;
2372 struct sdp_hh *sdp_hdr;
2373
2374 if (route->addr.src_addr.ss_family == AF_INET) {
2375 struct sockaddr_in *src4, *dst4;
2376
2377 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2378 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2379
2380 switch (ps) {
2381 case RDMA_PS_SDP:
2382 sdp_hdr = hdr;
2383 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2384 return -EINVAL;
2385 sdp_set_ip_ver(sdp_hdr, 4);
2386 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2387 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2388 sdp_hdr->port = src4->sin_port;
2389 break;
2390 default:
2391 cma_hdr = hdr;
2392 cma_hdr->cma_version = CMA_VERSION;
2393 cma_set_ip_ver(cma_hdr, 4);
2394 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2395 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2396 cma_hdr->port = src4->sin_port;
2397 break;
2398 }
2399 } else {
2400 struct sockaddr_in6 *src6, *dst6;
2401
2402 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2403 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2404
2405 switch (ps) {
2406 case RDMA_PS_SDP:
2407 sdp_hdr = hdr;
2408 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2409 return -EINVAL;
2410 sdp_set_ip_ver(sdp_hdr, 6);
2411 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2412 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2413 sdp_hdr->port = src6->sin6_port;
2414 break;
2415 default:
2416 cma_hdr = hdr;
2417 cma_hdr->cma_version = CMA_VERSION;
2418 cma_set_ip_ver(cma_hdr, 6);
2419 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2420 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2421 cma_hdr->port = src6->sin6_port;
2422 break;
2423 }
2424 }
2425 return 0;
2426 }
2427
2428 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2429 struct ib_cm_event *ib_event)
2430 {
2431 struct rdma_id_private *id_priv = cm_id->context;
2432 struct rdma_cm_event event;
2433 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2434 int ret = 0;
2435
2436 if (cma_disable_callback(id_priv, CMA_CONNECT))
2437 return 0;
2438
2439 memset(&event, 0, sizeof event);
2440 switch (ib_event->event) {
2441 case IB_CM_SIDR_REQ_ERROR:
2442 event.event = RDMA_CM_EVENT_UNREACHABLE;
2443 event.status = -ETIMEDOUT;
2444 break;
2445 case IB_CM_SIDR_REP_RECEIVED:
2446 event.param.ud.private_data = ib_event->private_data;
2447 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2448 if (rep->status != IB_SIDR_SUCCESS) {
2449 event.event = RDMA_CM_EVENT_UNREACHABLE;
2450 event.status = ib_event->param.sidr_rep_rcvd.status;
2451 break;
2452 }
2453 ret = cma_set_qkey(id_priv);
2454 if (ret) {
2455 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2456 event.status = -EINVAL;
2457 break;
2458 }
2459 if (id_priv->qkey != rep->qkey) {
2460 event.event = RDMA_CM_EVENT_UNREACHABLE;
2461 event.status = -EINVAL;
2462 break;
2463 }
2464 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2465 id_priv->id.route.path_rec,
2466 &event.param.ud.ah_attr);
2467 event.param.ud.qp_num = rep->qpn;
2468 event.param.ud.qkey = rep->qkey;
2469 event.event = RDMA_CM_EVENT_ESTABLISHED;
2470 event.status = 0;
2471 break;
2472 default:
2473 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2474 ib_event->event);
2475 goto out;
2476 }
2477
2478 ret = id_priv->id.event_handler(&id_priv->id, &event);
2479 if (ret) {
2480 /* Destroy the CM ID by returning a non-zero value. */
2481 id_priv->cm_id.ib = NULL;
2482 cma_exch(id_priv, CMA_DESTROYING);
2483 mutex_unlock(&id_priv->handler_mutex);
2484 rdma_destroy_id(&id_priv->id);
2485 return ret;
2486 }
2487 out:
2488 mutex_unlock(&id_priv->handler_mutex);
2489 return ret;
2490 }
2491
2492 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2493 struct rdma_conn_param *conn_param)
2494 {
2495 struct ib_cm_sidr_req_param req;
2496 struct rdma_route *route;
2497 int ret;
2498
2499 req.private_data_len = sizeof(struct cma_hdr) +
2500 conn_param->private_data_len;
2501 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2502 if (!req.private_data)
2503 return -ENOMEM;
2504
2505 if (conn_param->private_data && conn_param->private_data_len)
2506 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2507 conn_param->private_data, conn_param->private_data_len);
2508
2509 route = &id_priv->id.route;
2510 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2511 if (ret)
2512 goto out;
2513
2514 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2515 cma_sidr_rep_handler, id_priv);
2516 if (IS_ERR(id_priv->cm_id.ib)) {
2517 ret = PTR_ERR(id_priv->cm_id.ib);
2518 goto out;
2519 }
2520
2521 req.path = route->path_rec;
2522 req.service_id = cma_get_service_id(id_priv->id.ps,
2523 (struct sockaddr *) &route->addr.dst_addr);
2524 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2525 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2526
2527 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2528 if (ret) {
2529 ib_destroy_cm_id(id_priv->cm_id.ib);
2530 id_priv->cm_id.ib = NULL;
2531 }
2532 out:
2533 kfree(req.private_data);
2534 return ret;
2535 }
2536
2537 static int cma_connect_ib(struct rdma_id_private *id_priv,
2538 struct rdma_conn_param *conn_param)
2539 {
2540 struct ib_cm_req_param req;
2541 struct rdma_route *route;
2542 void *private_data;
2543 int offset, ret;
2544
2545 memset(&req, 0, sizeof req);
2546 offset = cma_user_data_offset(id_priv->id.ps);
2547 req.private_data_len = offset + conn_param->private_data_len;
2548 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2549 if (!private_data)
2550 return -ENOMEM;
2551
2552 if (conn_param->private_data && conn_param->private_data_len)
2553 memcpy(private_data + offset, conn_param->private_data,
2554 conn_param->private_data_len);
2555
2556 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2557 id_priv);
2558 if (IS_ERR(id_priv->cm_id.ib)) {
2559 ret = PTR_ERR(id_priv->cm_id.ib);
2560 goto out;
2561 }
2562
2563 route = &id_priv->id.route;
2564 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2565 if (ret)
2566 goto out;
2567 req.private_data = private_data;
2568
2569 req.primary_path = &route->path_rec[0];
2570 if (route->num_paths == 2)
2571 req.alternate_path = &route->path_rec[1];
2572
2573 req.service_id = cma_get_service_id(id_priv->id.ps,
2574 (struct sockaddr *) &route->addr.dst_addr);
2575 req.qp_num = id_priv->qp_num;
2576 req.qp_type = IB_QPT_RC;
2577 req.starting_psn = id_priv->seq_num;
2578 req.responder_resources = conn_param->responder_resources;
2579 req.initiator_depth = conn_param->initiator_depth;
2580 req.flow_control = conn_param->flow_control;
2581 req.retry_count = conn_param->retry_count;
2582 req.rnr_retry_count = conn_param->rnr_retry_count;
2583 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2584 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2585 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2586 req.srq = id_priv->srq ? 1 : 0;
2587
2588 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2589 out:
2590 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2591 ib_destroy_cm_id(id_priv->cm_id.ib);
2592 id_priv->cm_id.ib = NULL;
2593 }
2594
2595 kfree(private_data);
2596 return ret;
2597 }
2598
2599 static int cma_connect_iw(struct rdma_id_private *id_priv,
2600 struct rdma_conn_param *conn_param)
2601 {
2602 struct iw_cm_id *cm_id;
2603 struct sockaddr_in* sin;
2604 int ret;
2605 struct iw_cm_conn_param iw_param;
2606
2607 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2608 if (IS_ERR(cm_id)) {
2609 ret = PTR_ERR(cm_id);
2610 goto out;
2611 }
2612
2613 id_priv->cm_id.iw = cm_id;
2614
2615 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2616 cm_id->local_addr = *sin;
2617
2618 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2619 cm_id->remote_addr = *sin;
2620
2621 ret = cma_modify_qp_rtr(id_priv, conn_param);
2622 if (ret)
2623 goto out;
2624
2625 iw_param.ord = conn_param->initiator_depth;
2626 iw_param.ird = conn_param->responder_resources;
2627 iw_param.private_data = conn_param->private_data;
2628 iw_param.private_data_len = conn_param->private_data_len;
2629 if (id_priv->id.qp)
2630 iw_param.qpn = id_priv->qp_num;
2631 else
2632 iw_param.qpn = conn_param->qp_num;
2633 ret = iw_cm_connect(cm_id, &iw_param);
2634 out:
2635 if (ret && !IS_ERR(cm_id)) {
2636 iw_destroy_cm_id(cm_id);
2637 id_priv->cm_id.iw = NULL;
2638 }
2639 return ret;
2640 }
2641
2642 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2643 {
2644 struct rdma_id_private *id_priv;
2645 int ret;
2646
2647 id_priv = container_of(id, struct rdma_id_private, id);
2648 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2649 return -EINVAL;
2650
2651 if (!id->qp) {
2652 id_priv->qp_num = conn_param->qp_num;
2653 id_priv->srq = conn_param->srq;
2654 }
2655
2656 switch (rdma_node_get_transport(id->device->node_type)) {
2657 case RDMA_TRANSPORT_IB:
2658 if (cma_is_ud_ps(id->ps))
2659 ret = cma_resolve_ib_udp(id_priv, conn_param);
2660 else
2661 ret = cma_connect_ib(id_priv, conn_param);
2662 break;
2663 case RDMA_TRANSPORT_IWARP:
2664 ret = cma_connect_iw(id_priv, conn_param);
2665 break;
2666 default:
2667 ret = -ENOSYS;
2668 break;
2669 }
2670 if (ret)
2671 goto err;
2672
2673 return 0;
2674 err:
2675 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2676 return ret;
2677 }
2678 EXPORT_SYMBOL(rdma_connect);
2679
2680 static int cma_accept_ib(struct rdma_id_private *id_priv,
2681 struct rdma_conn_param *conn_param)
2682 {
2683 struct ib_cm_rep_param rep;
2684 int ret;
2685
2686 ret = cma_modify_qp_rtr(id_priv, conn_param);
2687 if (ret)
2688 goto out;
2689
2690 ret = cma_modify_qp_rts(id_priv, conn_param);
2691 if (ret)
2692 goto out;
2693
2694 memset(&rep, 0, sizeof rep);
2695 rep.qp_num = id_priv->qp_num;
2696 rep.starting_psn = id_priv->seq_num;
2697 rep.private_data = conn_param->private_data;
2698 rep.private_data_len = conn_param->private_data_len;
2699 rep.responder_resources = conn_param->responder_resources;
2700 rep.initiator_depth = conn_param->initiator_depth;
2701 rep.failover_accepted = 0;
2702 rep.flow_control = conn_param->flow_control;
2703 rep.rnr_retry_count = conn_param->rnr_retry_count;
2704 rep.srq = id_priv->srq ? 1 : 0;
2705
2706 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2707 out:
2708 return ret;
2709 }
2710
2711 static int cma_accept_iw(struct rdma_id_private *id_priv,
2712 struct rdma_conn_param *conn_param)
2713 {
2714 struct iw_cm_conn_param iw_param;
2715 int ret;
2716
2717 ret = cma_modify_qp_rtr(id_priv, conn_param);
2718 if (ret)
2719 return ret;
2720
2721 iw_param.ord = conn_param->initiator_depth;
2722 iw_param.ird = conn_param->responder_resources;
2723 iw_param.private_data = conn_param->private_data;
2724 iw_param.private_data_len = conn_param->private_data_len;
2725 if (id_priv->id.qp) {
2726 iw_param.qpn = id_priv->qp_num;
2727 } else
2728 iw_param.qpn = conn_param->qp_num;
2729
2730 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2731 }
2732
2733 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2734 enum ib_cm_sidr_status status,
2735 const void *private_data, int private_data_len)
2736 {
2737 struct ib_cm_sidr_rep_param rep;
2738 int ret;
2739
2740 memset(&rep, 0, sizeof rep);
2741 rep.status = status;
2742 if (status == IB_SIDR_SUCCESS) {
2743 ret = cma_set_qkey(id_priv);
2744 if (ret)
2745 return ret;
2746 rep.qp_num = id_priv->qp_num;
2747 rep.qkey = id_priv->qkey;
2748 }
2749 rep.private_data = private_data;
2750 rep.private_data_len = private_data_len;
2751
2752 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2753 }
2754
2755 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2756 {
2757 struct rdma_id_private *id_priv;
2758 int ret;
2759
2760 id_priv = container_of(id, struct rdma_id_private, id);
2761 if (!cma_comp(id_priv, CMA_CONNECT))
2762 return -EINVAL;
2763
2764 if (!id->qp && conn_param) {
2765 id_priv->qp_num = conn_param->qp_num;
2766 id_priv->srq = conn_param->srq;
2767 }
2768
2769 switch (rdma_node_get_transport(id->device->node_type)) {
2770 case RDMA_TRANSPORT_IB:
2771 if (cma_is_ud_ps(id->ps))
2772 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2773 conn_param->private_data,
2774 conn_param->private_data_len);
2775 else if (conn_param)
2776 ret = cma_accept_ib(id_priv, conn_param);
2777 else
2778 ret = cma_rep_recv(id_priv);
2779 break;
2780 case RDMA_TRANSPORT_IWARP:
2781 ret = cma_accept_iw(id_priv, conn_param);
2782 break;
2783 default:
2784 ret = -ENOSYS;
2785 break;
2786 }
2787
2788 if (ret)
2789 goto reject;
2790
2791 return 0;
2792 reject:
2793 cma_modify_qp_err(id_priv);
2794 rdma_reject(id, NULL, 0);
2795 return ret;
2796 }
2797 EXPORT_SYMBOL(rdma_accept);
2798
2799 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2800 {
2801 struct rdma_id_private *id_priv;
2802 int ret;
2803
2804 id_priv = container_of(id, struct rdma_id_private, id);
2805 if (!cma_has_cm_dev(id_priv))
2806 return -EINVAL;
2807
2808 switch (id->device->node_type) {
2809 case RDMA_NODE_IB_CA:
2810 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2811 break;
2812 default:
2813 ret = 0;
2814 break;
2815 }
2816 return ret;
2817 }
2818 EXPORT_SYMBOL(rdma_notify);
2819
2820 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2821 u8 private_data_len)
2822 {
2823 struct rdma_id_private *id_priv;
2824 int ret;
2825
2826 id_priv = container_of(id, struct rdma_id_private, id);
2827 if (!cma_has_cm_dev(id_priv))
2828 return -EINVAL;
2829
2830 switch (rdma_node_get_transport(id->device->node_type)) {
2831 case RDMA_TRANSPORT_IB:
2832 if (cma_is_ud_ps(id->ps))
2833 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2834 private_data, private_data_len);
2835 else
2836 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2837 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2838 0, private_data, private_data_len);
2839 break;
2840 case RDMA_TRANSPORT_IWARP:
2841 ret = iw_cm_reject(id_priv->cm_id.iw,
2842 private_data, private_data_len);
2843 break;
2844 default:
2845 ret = -ENOSYS;
2846 break;
2847 }
2848 return ret;
2849 }
2850 EXPORT_SYMBOL(rdma_reject);
2851
2852 int rdma_disconnect(struct rdma_cm_id *id)
2853 {
2854 struct rdma_id_private *id_priv;
2855 int ret;
2856
2857 id_priv = container_of(id, struct rdma_id_private, id);
2858 if (!cma_has_cm_dev(id_priv))
2859 return -EINVAL;
2860
2861 switch (rdma_node_get_transport(id->device->node_type)) {
2862 case RDMA_TRANSPORT_IB:
2863 ret = cma_modify_qp_err(id_priv);
2864 if (ret)
2865 goto out;
2866 /* Initiate or respond to a disconnect. */
2867 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2868 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2869 break;
2870 case RDMA_TRANSPORT_IWARP:
2871 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2872 break;
2873 default:
2874 ret = -EINVAL;
2875 break;
2876 }
2877 out:
2878 return ret;
2879 }
2880 EXPORT_SYMBOL(rdma_disconnect);
2881
2882 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2883 {
2884 struct rdma_id_private *id_priv;
2885 struct cma_multicast *mc = multicast->context;
2886 struct rdma_cm_event event;
2887 int ret;
2888
2889 id_priv = mc->id_priv;
2890 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2891 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
2892 return 0;
2893
2894 mutex_lock(&id_priv->qp_mutex);
2895 if (!status && id_priv->id.qp)
2896 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2897 multicast->rec.mlid);
2898 mutex_unlock(&id_priv->qp_mutex);
2899
2900 memset(&event, 0, sizeof event);
2901 event.status = status;
2902 event.param.ud.private_data = mc->context;
2903 if (!status) {
2904 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2905 ib_init_ah_from_mcmember(id_priv->id.device,
2906 id_priv->id.port_num, &multicast->rec,
2907 &event.param.ud.ah_attr);
2908 event.param.ud.qp_num = 0xFFFFFF;
2909 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2910 } else
2911 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2912
2913 ret = id_priv->id.event_handler(&id_priv->id, &event);
2914 if (ret) {
2915 cma_exch(id_priv, CMA_DESTROYING);
2916 mutex_unlock(&id_priv->handler_mutex);
2917 rdma_destroy_id(&id_priv->id);
2918 return 0;
2919 }
2920
2921 mutex_unlock(&id_priv->handler_mutex);
2922 return 0;
2923 }
2924
2925 static void cma_set_mgid(struct rdma_id_private *id_priv,
2926 struct sockaddr *addr, union ib_gid *mgid)
2927 {
2928 unsigned char mc_map[MAX_ADDR_LEN];
2929 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2930 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2931 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2932
2933 if (cma_any_addr(addr)) {
2934 memset(mgid, 0, sizeof *mgid);
2935 } else if ((addr->sa_family == AF_INET6) &&
2936 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
2937 0xFF10A01B)) {
2938 /* IPv6 address is an SA assigned MGID. */
2939 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2940 } else if ((addr->sa_family == AF_INET6)) {
2941 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2942 if (id_priv->id.ps == RDMA_PS_UDP)
2943 mc_map[7] = 0x01; /* Use RDMA CM signature */
2944 *mgid = *(union ib_gid *) (mc_map + 4);
2945 } else {
2946 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
2947 if (id_priv->id.ps == RDMA_PS_UDP)
2948 mc_map[7] = 0x01; /* Use RDMA CM signature */
2949 *mgid = *(union ib_gid *) (mc_map + 4);
2950 }
2951 }
2952
2953 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2954 struct cma_multicast *mc)
2955 {
2956 struct ib_sa_mcmember_rec rec;
2957 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2958 ib_sa_comp_mask comp_mask;
2959 int ret;
2960
2961 ib_addr_get_mgid(dev_addr, &rec.mgid);
2962 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2963 &rec.mgid, &rec);
2964 if (ret)
2965 return ret;
2966
2967 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
2968 if (id_priv->id.ps == RDMA_PS_UDP)
2969 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2970 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
2971 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2972 rec.join_state = 1;
2973
2974 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2975 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2976 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2977 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2978 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2979
2980 if (id_priv->id.ps == RDMA_PS_IPOIB)
2981 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2982 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2983
2984 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2985 id_priv->id.port_num, &rec,
2986 comp_mask, GFP_KERNEL,
2987 cma_ib_mc_handler, mc);
2988 if (IS_ERR(mc->multicast.ib))
2989 return PTR_ERR(mc->multicast.ib);
2990
2991 return 0;
2992 }
2993
2994 static void iboe_mcast_work_handler(struct work_struct *work)
2995 {
2996 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
2997 struct cma_multicast *mc = mw->mc;
2998 struct ib_sa_multicast *m = mc->multicast.ib;
2999
3000 mc->multicast.ib->context = mc;
3001 cma_ib_mc_handler(0, m);
3002 kref_put(&mc->mcref, release_mc);
3003 kfree(mw);
3004 }
3005
3006 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3007 {
3008 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3009 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3010
3011 if (cma_any_addr(addr)) {
3012 memset(mgid, 0, sizeof *mgid);
3013 } else if (addr->sa_family == AF_INET6) {
3014 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3015 } else {
3016 mgid->raw[0] = 0xff;
3017 mgid->raw[1] = 0x0e;
3018 mgid->raw[2] = 0;
3019 mgid->raw[3] = 0;
3020 mgid->raw[4] = 0;
3021 mgid->raw[5] = 0;
3022 mgid->raw[6] = 0;
3023 mgid->raw[7] = 0;
3024 mgid->raw[8] = 0;
3025 mgid->raw[9] = 0;
3026 mgid->raw[10] = 0xff;
3027 mgid->raw[11] = 0xff;
3028 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3029 }
3030 }
3031
3032 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3033 struct cma_multicast *mc)
3034 {
3035 struct iboe_mcast_work *work;
3036 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3037 int err;
3038 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3039 struct net_device *ndev = NULL;
3040
3041 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3042 return -EINVAL;
3043
3044 work = kzalloc(sizeof *work, GFP_KERNEL);
3045 if (!work)
3046 return -ENOMEM;
3047
3048 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3049 if (!mc->multicast.ib) {
3050 err = -ENOMEM;
3051 goto out1;
3052 }
3053
3054 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3055
3056 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3057 if (id_priv->id.ps == RDMA_PS_UDP)
3058 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3059
3060 if (dev_addr->bound_dev_if)
3061 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3062 if (!ndev) {
3063 err = -ENODEV;
3064 goto out2;
3065 }
3066 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3067 mc->multicast.ib->rec.hop_limit = 1;
3068 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3069 dev_put(ndev);
3070 if (!mc->multicast.ib->rec.mtu) {
3071 err = -EINVAL;
3072 goto out2;
3073 }
3074 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3075 work->id = id_priv;
3076 work->mc = mc;
3077 INIT_WORK(&work->work, iboe_mcast_work_handler);
3078 kref_get(&mc->mcref);
3079 queue_work(cma_wq, &work->work);
3080
3081 return 0;
3082
3083 out2:
3084 kfree(mc->multicast.ib);
3085 out1:
3086 kfree(work);
3087 return err;
3088 }
3089
3090 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3091 void *context)
3092 {
3093 struct rdma_id_private *id_priv;
3094 struct cma_multicast *mc;
3095 int ret;
3096
3097 id_priv = container_of(id, struct rdma_id_private, id);
3098 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
3099 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
3100 return -EINVAL;
3101
3102 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3103 if (!mc)
3104 return -ENOMEM;
3105
3106 memcpy(&mc->addr, addr, ip_addr_size(addr));
3107 mc->context = context;
3108 mc->id_priv = id_priv;
3109
3110 spin_lock(&id_priv->lock);
3111 list_add(&mc->list, &id_priv->mc_list);
3112 spin_unlock(&id_priv->lock);
3113
3114 switch (rdma_node_get_transport(id->device->node_type)) {
3115 case RDMA_TRANSPORT_IB:
3116 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3117 case IB_LINK_LAYER_INFINIBAND:
3118 ret = cma_join_ib_multicast(id_priv, mc);
3119 break;
3120 case IB_LINK_LAYER_ETHERNET:
3121 kref_init(&mc->mcref);
3122 ret = cma_iboe_join_multicast(id_priv, mc);
3123 break;
3124 default:
3125 ret = -EINVAL;
3126 }
3127 break;
3128 default:
3129 ret = -ENOSYS;
3130 break;
3131 }
3132
3133 if (ret) {
3134 spin_lock_irq(&id_priv->lock);
3135 list_del(&mc->list);
3136 spin_unlock_irq(&id_priv->lock);
3137 kfree(mc);
3138 }
3139 return ret;
3140 }
3141 EXPORT_SYMBOL(rdma_join_multicast);
3142
3143 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3144 {
3145 struct rdma_id_private *id_priv;
3146 struct cma_multicast *mc;
3147
3148 id_priv = container_of(id, struct rdma_id_private, id);
3149 spin_lock_irq(&id_priv->lock);
3150 list_for_each_entry(mc, &id_priv->mc_list, list) {
3151 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3152 list_del(&mc->list);
3153 spin_unlock_irq(&id_priv->lock);
3154
3155 if (id->qp)
3156 ib_detach_mcast(id->qp,
3157 &mc->multicast.ib->rec.mgid,
3158 mc->multicast.ib->rec.mlid);
3159 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3160 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3161 case IB_LINK_LAYER_INFINIBAND:
3162 ib_sa_free_multicast(mc->multicast.ib);
3163 kfree(mc);
3164 break;
3165 case IB_LINK_LAYER_ETHERNET:
3166 kref_put(&mc->mcref, release_mc);
3167 break;
3168 default:
3169 break;
3170 }
3171 }
3172 return;
3173 }
3174 }
3175 spin_unlock_irq(&id_priv->lock);
3176 }
3177 EXPORT_SYMBOL(rdma_leave_multicast);
3178
3179 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3180 {
3181 struct rdma_dev_addr *dev_addr;
3182 struct cma_ndev_work *work;
3183
3184 dev_addr = &id_priv->id.route.addr.dev_addr;
3185
3186 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3187 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3188 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3189 ndev->name, &id_priv->id);
3190 work = kzalloc(sizeof *work, GFP_KERNEL);
3191 if (!work)
3192 return -ENOMEM;
3193
3194 INIT_WORK(&work->work, cma_ndev_work_handler);
3195 work->id = id_priv;
3196 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3197 atomic_inc(&id_priv->refcount);
3198 queue_work(cma_wq, &work->work);
3199 }
3200
3201 return 0;
3202 }
3203
3204 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3205 void *ctx)
3206 {
3207 struct net_device *ndev = (struct net_device *)ctx;
3208 struct cma_device *cma_dev;
3209 struct rdma_id_private *id_priv;
3210 int ret = NOTIFY_DONE;
3211
3212 if (dev_net(ndev) != &init_net)
3213 return NOTIFY_DONE;
3214
3215 if (event != NETDEV_BONDING_FAILOVER)
3216 return NOTIFY_DONE;
3217
3218 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3219 return NOTIFY_DONE;
3220
3221 mutex_lock(&lock);
3222 list_for_each_entry(cma_dev, &dev_list, list)
3223 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3224 ret = cma_netdev_change(ndev, id_priv);
3225 if (ret)
3226 goto out;
3227 }
3228
3229 out:
3230 mutex_unlock(&lock);
3231 return ret;
3232 }
3233
3234 static struct notifier_block cma_nb = {
3235 .notifier_call = cma_netdev_callback
3236 };
3237
3238 static void cma_add_one(struct ib_device *device)
3239 {
3240 struct cma_device *cma_dev;
3241 struct rdma_id_private *id_priv;
3242
3243 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3244 if (!cma_dev)
3245 return;
3246
3247 cma_dev->device = device;
3248
3249 init_completion(&cma_dev->comp);
3250 atomic_set(&cma_dev->refcount, 1);
3251 INIT_LIST_HEAD(&cma_dev->id_list);
3252 ib_set_client_data(device, &cma_client, cma_dev);
3253
3254 mutex_lock(&lock);
3255 list_add_tail(&cma_dev->list, &dev_list);
3256 list_for_each_entry(id_priv, &listen_any_list, list)
3257 cma_listen_on_dev(id_priv, cma_dev);
3258 mutex_unlock(&lock);
3259 }
3260
3261 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3262 {
3263 struct rdma_cm_event event;
3264 enum cma_state state;
3265 int ret = 0;
3266
3267 /* Record that we want to remove the device */
3268 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
3269 if (state == CMA_DESTROYING)
3270 return 0;
3271
3272 cma_cancel_operation(id_priv, state);
3273 mutex_lock(&id_priv->handler_mutex);
3274
3275 /* Check for destruction from another callback. */
3276 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
3277 goto out;
3278
3279 memset(&event, 0, sizeof event);
3280 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3281 ret = id_priv->id.event_handler(&id_priv->id, &event);
3282 out:
3283 mutex_unlock(&id_priv->handler_mutex);
3284 return ret;
3285 }
3286
3287 static void cma_process_remove(struct cma_device *cma_dev)
3288 {
3289 struct rdma_id_private *id_priv;
3290 int ret;
3291
3292 mutex_lock(&lock);
3293 while (!list_empty(&cma_dev->id_list)) {
3294 id_priv = list_entry(cma_dev->id_list.next,
3295 struct rdma_id_private, list);
3296
3297 list_del(&id_priv->listen_list);
3298 list_del_init(&id_priv->list);
3299 atomic_inc(&id_priv->refcount);
3300 mutex_unlock(&lock);
3301
3302 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3303 cma_deref_id(id_priv);
3304 if (ret)
3305 rdma_destroy_id(&id_priv->id);
3306
3307 mutex_lock(&lock);
3308 }
3309 mutex_unlock(&lock);
3310
3311 cma_deref_dev(cma_dev);
3312 wait_for_completion(&cma_dev->comp);
3313 }
3314
3315 static void cma_remove_one(struct ib_device *device)
3316 {
3317 struct cma_device *cma_dev;
3318
3319 cma_dev = ib_get_client_data(device, &cma_client);
3320 if (!cma_dev)
3321 return;
3322
3323 mutex_lock(&lock);
3324 list_del(&cma_dev->list);
3325 mutex_unlock(&lock);
3326
3327 cma_process_remove(cma_dev);
3328 kfree(cma_dev);
3329 }
3330
3331 static int __init cma_init(void)
3332 {
3333 int ret;
3334
3335 cma_wq = create_singlethread_workqueue("rdma_cm");
3336 if (!cma_wq)
3337 return -ENOMEM;
3338
3339 ib_sa_register_client(&sa_client);
3340 rdma_addr_register_client(&addr_client);
3341 register_netdevice_notifier(&cma_nb);
3342
3343 ret = ib_register_client(&cma_client);
3344 if (ret)
3345 goto err;
3346 return 0;
3347
3348 err:
3349 unregister_netdevice_notifier(&cma_nb);
3350 rdma_addr_unregister_client(&addr_client);
3351 ib_sa_unregister_client(&sa_client);
3352 destroy_workqueue(cma_wq);
3353 return ret;
3354 }
3355
3356 static void __exit cma_cleanup(void)
3357 {
3358 ib_unregister_client(&cma_client);
3359 unregister_netdevice_notifier(&cma_nb);
3360 rdma_addr_unregister_client(&addr_client);
3361 ib_sa_unregister_client(&sa_client);
3362 destroy_workqueue(cma_wq);
3363 idr_destroy(&sdp_ps);
3364 idr_destroy(&tcp_ps);
3365 idr_destroy(&udp_ps);
3366 idr_destroy(&ipoib_ps);
3367 }
3368
3369 module_init(cma_init);
3370 module_exit(cma_cleanup);