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atm: Allow MSG_PEEK for atm sockets
[deliverable/linux.git] / drivers / infiniband / core / cma.c
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 #include <linux/module.h>
45
46 #include <net/tcp.h>
47 #include <net/ipv6.h>
48
49 #include <rdma/rdma_cm.h>
50 #include <rdma/rdma_cm_ib.h>
51 #include <rdma/rdma_netlink.h>
52 #include <rdma/ib_cache.h>
53 #include <rdma/ib_cm.h>
54 #include <rdma/ib_sa.h>
55 #include <rdma/iw_cm.h>
56
57 MODULE_AUTHOR("Sean Hefty");
58 MODULE_DESCRIPTION("Generic RDMA CM Agent");
59 MODULE_LICENSE("Dual BSD/GPL");
60
61 #define CMA_CM_RESPONSE_TIMEOUT 20
62 #define CMA_MAX_CM_RETRIES 15
63 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
64 #define CMA_IBOE_PACKET_LIFETIME 18
65
66 static void cma_add_one(struct ib_device *device);
67 static void cma_remove_one(struct ib_device *device);
68
69 static struct ib_client cma_client = {
70 .name = "cma",
71 .add = cma_add_one,
72 .remove = cma_remove_one
73 };
74
75 static struct ib_sa_client sa_client;
76 static struct rdma_addr_client addr_client;
77 static LIST_HEAD(dev_list);
78 static LIST_HEAD(listen_any_list);
79 static DEFINE_MUTEX(lock);
80 static struct workqueue_struct *cma_wq;
81 static DEFINE_IDR(sdp_ps);
82 static DEFINE_IDR(tcp_ps);
83 static DEFINE_IDR(udp_ps);
84 static DEFINE_IDR(ipoib_ps);
85 static DEFINE_IDR(ib_ps);
86
87 struct cma_device {
88 struct list_head list;
89 struct ib_device *device;
90 struct completion comp;
91 atomic_t refcount;
92 struct list_head id_list;
93 };
94
95 struct rdma_bind_list {
96 struct idr *ps;
97 struct hlist_head owners;
98 unsigned short port;
99 };
100
101 /*
102 * Device removal can occur at anytime, so we need extra handling to
103 * serialize notifying the user of device removal with other callbacks.
104 * We do this by disabling removal notification while a callback is in process,
105 * and reporting it after the callback completes.
106 */
107 struct rdma_id_private {
108 struct rdma_cm_id id;
109
110 struct rdma_bind_list *bind_list;
111 struct hlist_node node;
112 struct list_head list; /* listen_any_list or cma_device.list */
113 struct list_head listen_list; /* per device listens */
114 struct cma_device *cma_dev;
115 struct list_head mc_list;
116
117 int internal_id;
118 enum rdma_cm_state state;
119 spinlock_t lock;
120 struct mutex qp_mutex;
121
122 struct completion comp;
123 atomic_t refcount;
124 struct mutex handler_mutex;
125
126 int backlog;
127 int timeout_ms;
128 struct ib_sa_query *query;
129 int query_id;
130 union {
131 struct ib_cm_id *ib;
132 struct iw_cm_id *iw;
133 } cm_id;
134
135 u32 seq_num;
136 u32 qkey;
137 u32 qp_num;
138 pid_t owner;
139 u8 srq;
140 u8 tos;
141 u8 reuseaddr;
142 };
143
144 struct cma_multicast {
145 struct rdma_id_private *id_priv;
146 union {
147 struct ib_sa_multicast *ib;
148 } multicast;
149 struct list_head list;
150 void *context;
151 struct sockaddr_storage addr;
152 struct kref mcref;
153 };
154
155 struct cma_work {
156 struct work_struct work;
157 struct rdma_id_private *id;
158 enum rdma_cm_state old_state;
159 enum rdma_cm_state new_state;
160 struct rdma_cm_event event;
161 };
162
163 struct cma_ndev_work {
164 struct work_struct work;
165 struct rdma_id_private *id;
166 struct rdma_cm_event event;
167 };
168
169 struct iboe_mcast_work {
170 struct work_struct work;
171 struct rdma_id_private *id;
172 struct cma_multicast *mc;
173 };
174
175 union cma_ip_addr {
176 struct in6_addr ip6;
177 struct {
178 __be32 pad[3];
179 __be32 addr;
180 } ip4;
181 };
182
183 struct cma_hdr {
184 u8 cma_version;
185 u8 ip_version; /* IP version: 7:4 */
186 __be16 port;
187 union cma_ip_addr src_addr;
188 union cma_ip_addr dst_addr;
189 };
190
191 struct sdp_hh {
192 u8 bsdh[16];
193 u8 sdp_version; /* Major version: 7:4 */
194 u8 ip_version; /* IP version: 7:4 */
195 u8 sdp_specific1[10];
196 __be16 port;
197 __be16 sdp_specific2;
198 union cma_ip_addr src_addr;
199 union cma_ip_addr dst_addr;
200 };
201
202 struct sdp_hah {
203 u8 bsdh[16];
204 u8 sdp_version;
205 };
206
207 #define CMA_VERSION 0x00
208 #define SDP_MAJ_VERSION 0x2
209
210 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
211 {
212 unsigned long flags;
213 int ret;
214
215 spin_lock_irqsave(&id_priv->lock, flags);
216 ret = (id_priv->state == comp);
217 spin_unlock_irqrestore(&id_priv->lock, flags);
218 return ret;
219 }
220
221 static int cma_comp_exch(struct rdma_id_private *id_priv,
222 enum rdma_cm_state comp, enum rdma_cm_state exch)
223 {
224 unsigned long flags;
225 int ret;
226
227 spin_lock_irqsave(&id_priv->lock, flags);
228 if ((ret = (id_priv->state == comp)))
229 id_priv->state = exch;
230 spin_unlock_irqrestore(&id_priv->lock, flags);
231 return ret;
232 }
233
234 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
235 enum rdma_cm_state exch)
236 {
237 unsigned long flags;
238 enum rdma_cm_state old;
239
240 spin_lock_irqsave(&id_priv->lock, flags);
241 old = id_priv->state;
242 id_priv->state = exch;
243 spin_unlock_irqrestore(&id_priv->lock, flags);
244 return old;
245 }
246
247 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
248 {
249 return hdr->ip_version >> 4;
250 }
251
252 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
253 {
254 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
255 }
256
257 static inline u8 sdp_get_majv(u8 sdp_version)
258 {
259 return sdp_version >> 4;
260 }
261
262 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
263 {
264 return hh->ip_version >> 4;
265 }
266
267 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
268 {
269 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
270 }
271
272 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
273 struct cma_device *cma_dev)
274 {
275 atomic_inc(&cma_dev->refcount);
276 id_priv->cma_dev = cma_dev;
277 id_priv->id.device = cma_dev->device;
278 id_priv->id.route.addr.dev_addr.transport =
279 rdma_node_get_transport(cma_dev->device->node_type);
280 list_add_tail(&id_priv->list, &cma_dev->id_list);
281 }
282
283 static inline void cma_deref_dev(struct cma_device *cma_dev)
284 {
285 if (atomic_dec_and_test(&cma_dev->refcount))
286 complete(&cma_dev->comp);
287 }
288
289 static inline void release_mc(struct kref *kref)
290 {
291 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
292
293 kfree(mc->multicast.ib);
294 kfree(mc);
295 }
296
297 static void cma_release_dev(struct rdma_id_private *id_priv)
298 {
299 mutex_lock(&lock);
300 list_del(&id_priv->list);
301 cma_deref_dev(id_priv->cma_dev);
302 id_priv->cma_dev = NULL;
303 mutex_unlock(&lock);
304 }
305
306 static int cma_set_qkey(struct rdma_id_private *id_priv)
307 {
308 struct ib_sa_mcmember_rec rec;
309 int ret = 0;
310
311 if (id_priv->qkey)
312 return 0;
313
314 switch (id_priv->id.ps) {
315 case RDMA_PS_UDP:
316 id_priv->qkey = RDMA_UDP_QKEY;
317 break;
318 case RDMA_PS_IPOIB:
319 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
320 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
321 id_priv->id.port_num, &rec.mgid,
322 &rec);
323 if (!ret)
324 id_priv->qkey = be32_to_cpu(rec.qkey);
325 break;
326 default:
327 break;
328 }
329 return ret;
330 }
331
332 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
333 {
334 int i;
335 int err;
336 struct ib_port_attr props;
337 union ib_gid tmp;
338
339 err = ib_query_port(device, port_num, &props);
340 if (err)
341 return 1;
342
343 for (i = 0; i < props.gid_tbl_len; ++i) {
344 err = ib_query_gid(device, port_num, i, &tmp);
345 if (err)
346 return 1;
347 if (!memcmp(&tmp, gid, sizeof tmp))
348 return 0;
349 }
350
351 return -EAGAIN;
352 }
353
354 static int cma_acquire_dev(struct rdma_id_private *id_priv)
355 {
356 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
357 struct cma_device *cma_dev;
358 union ib_gid gid, iboe_gid;
359 int ret = -ENODEV;
360 u8 port;
361 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
362 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
363
364 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
365 id_priv->id.ps == RDMA_PS_IPOIB)
366 return -EINVAL;
367
368 mutex_lock(&lock);
369 iboe_addr_get_sgid(dev_addr, &iboe_gid);
370 memcpy(&gid, dev_addr->src_dev_addr +
371 rdma_addr_gid_offset(dev_addr), sizeof gid);
372 list_for_each_entry(cma_dev, &dev_list, list) {
373 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
374 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
375 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
376 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
377 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
378 else
379 ret = find_gid_port(cma_dev->device, &gid, port);
380
381 if (!ret) {
382 id_priv->id.port_num = port;
383 goto out;
384 } else if (ret == 1)
385 break;
386 }
387 }
388 }
389
390 out:
391 if (!ret)
392 cma_attach_to_dev(id_priv, cma_dev);
393
394 mutex_unlock(&lock);
395 return ret;
396 }
397
398 static void cma_deref_id(struct rdma_id_private *id_priv)
399 {
400 if (atomic_dec_and_test(&id_priv->refcount))
401 complete(&id_priv->comp);
402 }
403
404 static int cma_disable_callback(struct rdma_id_private *id_priv,
405 enum rdma_cm_state state)
406 {
407 mutex_lock(&id_priv->handler_mutex);
408 if (id_priv->state != state) {
409 mutex_unlock(&id_priv->handler_mutex);
410 return -EINVAL;
411 }
412 return 0;
413 }
414
415 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
416 void *context, enum rdma_port_space ps,
417 enum ib_qp_type qp_type)
418 {
419 struct rdma_id_private *id_priv;
420
421 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
422 if (!id_priv)
423 return ERR_PTR(-ENOMEM);
424
425 id_priv->owner = task_pid_nr(current);
426 id_priv->state = RDMA_CM_IDLE;
427 id_priv->id.context = context;
428 id_priv->id.event_handler = event_handler;
429 id_priv->id.ps = ps;
430 id_priv->id.qp_type = qp_type;
431 spin_lock_init(&id_priv->lock);
432 mutex_init(&id_priv->qp_mutex);
433 init_completion(&id_priv->comp);
434 atomic_set(&id_priv->refcount, 1);
435 mutex_init(&id_priv->handler_mutex);
436 INIT_LIST_HEAD(&id_priv->listen_list);
437 INIT_LIST_HEAD(&id_priv->mc_list);
438 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
439
440 return &id_priv->id;
441 }
442 EXPORT_SYMBOL(rdma_create_id);
443
444 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
445 {
446 struct ib_qp_attr qp_attr;
447 int qp_attr_mask, ret;
448
449 qp_attr.qp_state = IB_QPS_INIT;
450 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
451 if (ret)
452 return ret;
453
454 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
455 if (ret)
456 return ret;
457
458 qp_attr.qp_state = IB_QPS_RTR;
459 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
460 if (ret)
461 return ret;
462
463 qp_attr.qp_state = IB_QPS_RTS;
464 qp_attr.sq_psn = 0;
465 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
466
467 return ret;
468 }
469
470 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
471 {
472 struct ib_qp_attr qp_attr;
473 int qp_attr_mask, ret;
474
475 qp_attr.qp_state = IB_QPS_INIT;
476 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
477 if (ret)
478 return ret;
479
480 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
481 }
482
483 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
484 struct ib_qp_init_attr *qp_init_attr)
485 {
486 struct rdma_id_private *id_priv;
487 struct ib_qp *qp;
488 int ret;
489
490 id_priv = container_of(id, struct rdma_id_private, id);
491 if (id->device != pd->device)
492 return -EINVAL;
493
494 qp = ib_create_qp(pd, qp_init_attr);
495 if (IS_ERR(qp))
496 return PTR_ERR(qp);
497
498 if (id->qp_type == IB_QPT_UD)
499 ret = cma_init_ud_qp(id_priv, qp);
500 else
501 ret = cma_init_conn_qp(id_priv, qp);
502 if (ret)
503 goto err;
504
505 id->qp = qp;
506 id_priv->qp_num = qp->qp_num;
507 id_priv->srq = (qp->srq != NULL);
508 return 0;
509 err:
510 ib_destroy_qp(qp);
511 return ret;
512 }
513 EXPORT_SYMBOL(rdma_create_qp);
514
515 void rdma_destroy_qp(struct rdma_cm_id *id)
516 {
517 struct rdma_id_private *id_priv;
518
519 id_priv = container_of(id, struct rdma_id_private, id);
520 mutex_lock(&id_priv->qp_mutex);
521 ib_destroy_qp(id_priv->id.qp);
522 id_priv->id.qp = NULL;
523 mutex_unlock(&id_priv->qp_mutex);
524 }
525 EXPORT_SYMBOL(rdma_destroy_qp);
526
527 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
528 struct rdma_conn_param *conn_param)
529 {
530 struct ib_qp_attr qp_attr;
531 int qp_attr_mask, ret;
532
533 mutex_lock(&id_priv->qp_mutex);
534 if (!id_priv->id.qp) {
535 ret = 0;
536 goto out;
537 }
538
539 /* Need to update QP attributes from default values. */
540 qp_attr.qp_state = IB_QPS_INIT;
541 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
542 if (ret)
543 goto out;
544
545 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
546 if (ret)
547 goto out;
548
549 qp_attr.qp_state = IB_QPS_RTR;
550 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
551 if (ret)
552 goto out;
553
554 if (conn_param)
555 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
556 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
557 out:
558 mutex_unlock(&id_priv->qp_mutex);
559 return ret;
560 }
561
562 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
563 struct rdma_conn_param *conn_param)
564 {
565 struct ib_qp_attr qp_attr;
566 int qp_attr_mask, ret;
567
568 mutex_lock(&id_priv->qp_mutex);
569 if (!id_priv->id.qp) {
570 ret = 0;
571 goto out;
572 }
573
574 qp_attr.qp_state = IB_QPS_RTS;
575 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
576 if (ret)
577 goto out;
578
579 if (conn_param)
580 qp_attr.max_rd_atomic = conn_param->initiator_depth;
581 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
582 out:
583 mutex_unlock(&id_priv->qp_mutex);
584 return ret;
585 }
586
587 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
588 {
589 struct ib_qp_attr qp_attr;
590 int ret;
591
592 mutex_lock(&id_priv->qp_mutex);
593 if (!id_priv->id.qp) {
594 ret = 0;
595 goto out;
596 }
597
598 qp_attr.qp_state = IB_QPS_ERR;
599 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
600 out:
601 mutex_unlock(&id_priv->qp_mutex);
602 return ret;
603 }
604
605 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
606 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
607 {
608 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
609 int ret;
610 u16 pkey;
611
612 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
613 IB_LINK_LAYER_INFINIBAND)
614 pkey = ib_addr_get_pkey(dev_addr);
615 else
616 pkey = 0xffff;
617
618 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
619 pkey, &qp_attr->pkey_index);
620 if (ret)
621 return ret;
622
623 qp_attr->port_num = id_priv->id.port_num;
624 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
625
626 if (id_priv->id.qp_type == IB_QPT_UD) {
627 ret = cma_set_qkey(id_priv);
628 if (ret)
629 return ret;
630
631 qp_attr->qkey = id_priv->qkey;
632 *qp_attr_mask |= IB_QP_QKEY;
633 } else {
634 qp_attr->qp_access_flags = 0;
635 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
636 }
637 return 0;
638 }
639
640 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
641 int *qp_attr_mask)
642 {
643 struct rdma_id_private *id_priv;
644 int ret = 0;
645
646 id_priv = container_of(id, struct rdma_id_private, id);
647 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
648 case RDMA_TRANSPORT_IB:
649 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
650 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
651 else
652 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
653 qp_attr_mask);
654 if (qp_attr->qp_state == IB_QPS_RTR)
655 qp_attr->rq_psn = id_priv->seq_num;
656 break;
657 case RDMA_TRANSPORT_IWARP:
658 if (!id_priv->cm_id.iw) {
659 qp_attr->qp_access_flags = 0;
660 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
661 } else
662 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
663 qp_attr_mask);
664 break;
665 default:
666 ret = -ENOSYS;
667 break;
668 }
669
670 return ret;
671 }
672 EXPORT_SYMBOL(rdma_init_qp_attr);
673
674 static inline int cma_zero_addr(struct sockaddr *addr)
675 {
676 struct in6_addr *ip6;
677
678 if (addr->sa_family == AF_INET)
679 return ipv4_is_zeronet(
680 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
681 else {
682 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
683 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
684 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
685 }
686 }
687
688 static inline int cma_loopback_addr(struct sockaddr *addr)
689 {
690 if (addr->sa_family == AF_INET)
691 return ipv4_is_loopback(
692 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
693 else
694 return ipv6_addr_loopback(
695 &((struct sockaddr_in6 *) addr)->sin6_addr);
696 }
697
698 static inline int cma_any_addr(struct sockaddr *addr)
699 {
700 return cma_zero_addr(addr) || cma_loopback_addr(addr);
701 }
702
703 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
704 {
705 if (src->sa_family != dst->sa_family)
706 return -1;
707
708 switch (src->sa_family) {
709 case AF_INET:
710 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
711 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
712 default:
713 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
714 &((struct sockaddr_in6 *) dst)->sin6_addr);
715 }
716 }
717
718 static inline __be16 cma_port(struct sockaddr *addr)
719 {
720 if (addr->sa_family == AF_INET)
721 return ((struct sockaddr_in *) addr)->sin_port;
722 else
723 return ((struct sockaddr_in6 *) addr)->sin6_port;
724 }
725
726 static inline int cma_any_port(struct sockaddr *addr)
727 {
728 return !cma_port(addr);
729 }
730
731 static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
732 u8 *ip_ver, __be16 *port,
733 union cma_ip_addr **src, union cma_ip_addr **dst)
734 {
735 switch (ps) {
736 case RDMA_PS_SDP:
737 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
738 SDP_MAJ_VERSION)
739 return -EINVAL;
740
741 *ip_ver = sdp_get_ip_ver(hdr);
742 *port = ((struct sdp_hh *) hdr)->port;
743 *src = &((struct sdp_hh *) hdr)->src_addr;
744 *dst = &((struct sdp_hh *) hdr)->dst_addr;
745 break;
746 default:
747 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
748 return -EINVAL;
749
750 *ip_ver = cma_get_ip_ver(hdr);
751 *port = ((struct cma_hdr *) hdr)->port;
752 *src = &((struct cma_hdr *) hdr)->src_addr;
753 *dst = &((struct cma_hdr *) hdr)->dst_addr;
754 break;
755 }
756
757 if (*ip_ver != 4 && *ip_ver != 6)
758 return -EINVAL;
759 return 0;
760 }
761
762 static void cma_save_net_info(struct rdma_addr *addr,
763 struct rdma_addr *listen_addr,
764 u8 ip_ver, __be16 port,
765 union cma_ip_addr *src, union cma_ip_addr *dst)
766 {
767 struct sockaddr_in *listen4, *ip4;
768 struct sockaddr_in6 *listen6, *ip6;
769
770 switch (ip_ver) {
771 case 4:
772 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
773 ip4 = (struct sockaddr_in *) &addr->src_addr;
774 ip4->sin_family = listen4->sin_family;
775 ip4->sin_addr.s_addr = dst->ip4.addr;
776 ip4->sin_port = listen4->sin_port;
777
778 ip4 = (struct sockaddr_in *) &addr->dst_addr;
779 ip4->sin_family = listen4->sin_family;
780 ip4->sin_addr.s_addr = src->ip4.addr;
781 ip4->sin_port = port;
782 break;
783 case 6:
784 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
785 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
786 ip6->sin6_family = listen6->sin6_family;
787 ip6->sin6_addr = dst->ip6;
788 ip6->sin6_port = listen6->sin6_port;
789
790 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
791 ip6->sin6_family = listen6->sin6_family;
792 ip6->sin6_addr = src->ip6;
793 ip6->sin6_port = port;
794 break;
795 default:
796 break;
797 }
798 }
799
800 static inline int cma_user_data_offset(enum rdma_port_space ps)
801 {
802 switch (ps) {
803 case RDMA_PS_SDP:
804 return 0;
805 default:
806 return sizeof(struct cma_hdr);
807 }
808 }
809
810 static void cma_cancel_route(struct rdma_id_private *id_priv)
811 {
812 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
813 case IB_LINK_LAYER_INFINIBAND:
814 if (id_priv->query)
815 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
816 break;
817 default:
818 break;
819 }
820 }
821
822 static void cma_cancel_listens(struct rdma_id_private *id_priv)
823 {
824 struct rdma_id_private *dev_id_priv;
825
826 /*
827 * Remove from listen_any_list to prevent added devices from spawning
828 * additional listen requests.
829 */
830 mutex_lock(&lock);
831 list_del(&id_priv->list);
832
833 while (!list_empty(&id_priv->listen_list)) {
834 dev_id_priv = list_entry(id_priv->listen_list.next,
835 struct rdma_id_private, listen_list);
836 /* sync with device removal to avoid duplicate destruction */
837 list_del_init(&dev_id_priv->list);
838 list_del(&dev_id_priv->listen_list);
839 mutex_unlock(&lock);
840
841 rdma_destroy_id(&dev_id_priv->id);
842 mutex_lock(&lock);
843 }
844 mutex_unlock(&lock);
845 }
846
847 static void cma_cancel_operation(struct rdma_id_private *id_priv,
848 enum rdma_cm_state state)
849 {
850 switch (state) {
851 case RDMA_CM_ADDR_QUERY:
852 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
853 break;
854 case RDMA_CM_ROUTE_QUERY:
855 cma_cancel_route(id_priv);
856 break;
857 case RDMA_CM_LISTEN:
858 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
859 && !id_priv->cma_dev)
860 cma_cancel_listens(id_priv);
861 break;
862 default:
863 break;
864 }
865 }
866
867 static void cma_release_port(struct rdma_id_private *id_priv)
868 {
869 struct rdma_bind_list *bind_list = id_priv->bind_list;
870
871 if (!bind_list)
872 return;
873
874 mutex_lock(&lock);
875 hlist_del(&id_priv->node);
876 if (hlist_empty(&bind_list->owners)) {
877 idr_remove(bind_list->ps, bind_list->port);
878 kfree(bind_list);
879 }
880 mutex_unlock(&lock);
881 }
882
883 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
884 {
885 struct cma_multicast *mc;
886
887 while (!list_empty(&id_priv->mc_list)) {
888 mc = container_of(id_priv->mc_list.next,
889 struct cma_multicast, list);
890 list_del(&mc->list);
891 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
892 case IB_LINK_LAYER_INFINIBAND:
893 ib_sa_free_multicast(mc->multicast.ib);
894 kfree(mc);
895 break;
896 case IB_LINK_LAYER_ETHERNET:
897 kref_put(&mc->mcref, release_mc);
898 break;
899 default:
900 break;
901 }
902 }
903 }
904
905 void rdma_destroy_id(struct rdma_cm_id *id)
906 {
907 struct rdma_id_private *id_priv;
908 enum rdma_cm_state state;
909
910 id_priv = container_of(id, struct rdma_id_private, id);
911 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
912 cma_cancel_operation(id_priv, state);
913
914 /*
915 * Wait for any active callback to finish. New callbacks will find
916 * the id_priv state set to destroying and abort.
917 */
918 mutex_lock(&id_priv->handler_mutex);
919 mutex_unlock(&id_priv->handler_mutex);
920
921 if (id_priv->cma_dev) {
922 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
923 case RDMA_TRANSPORT_IB:
924 if (id_priv->cm_id.ib)
925 ib_destroy_cm_id(id_priv->cm_id.ib);
926 break;
927 case RDMA_TRANSPORT_IWARP:
928 if (id_priv->cm_id.iw)
929 iw_destroy_cm_id(id_priv->cm_id.iw);
930 break;
931 default:
932 break;
933 }
934 cma_leave_mc_groups(id_priv);
935 cma_release_dev(id_priv);
936 }
937
938 cma_release_port(id_priv);
939 cma_deref_id(id_priv);
940 wait_for_completion(&id_priv->comp);
941
942 if (id_priv->internal_id)
943 cma_deref_id(id_priv->id.context);
944
945 kfree(id_priv->id.route.path_rec);
946 kfree(id_priv);
947 }
948 EXPORT_SYMBOL(rdma_destroy_id);
949
950 static int cma_rep_recv(struct rdma_id_private *id_priv)
951 {
952 int ret;
953
954 ret = cma_modify_qp_rtr(id_priv, NULL);
955 if (ret)
956 goto reject;
957
958 ret = cma_modify_qp_rts(id_priv, NULL);
959 if (ret)
960 goto reject;
961
962 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
963 if (ret)
964 goto reject;
965
966 return 0;
967 reject:
968 cma_modify_qp_err(id_priv);
969 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
970 NULL, 0, NULL, 0);
971 return ret;
972 }
973
974 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
975 {
976 if (id_priv->id.ps == RDMA_PS_SDP &&
977 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
978 SDP_MAJ_VERSION)
979 return -EINVAL;
980
981 return 0;
982 }
983
984 static void cma_set_rep_event_data(struct rdma_cm_event *event,
985 struct ib_cm_rep_event_param *rep_data,
986 void *private_data)
987 {
988 event->param.conn.private_data = private_data;
989 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
990 event->param.conn.responder_resources = rep_data->responder_resources;
991 event->param.conn.initiator_depth = rep_data->initiator_depth;
992 event->param.conn.flow_control = rep_data->flow_control;
993 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
994 event->param.conn.srq = rep_data->srq;
995 event->param.conn.qp_num = rep_data->remote_qpn;
996 }
997
998 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
999 {
1000 struct rdma_id_private *id_priv = cm_id->context;
1001 struct rdma_cm_event event;
1002 int ret = 0;
1003
1004 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1005 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1006 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1007 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1008 return 0;
1009
1010 memset(&event, 0, sizeof event);
1011 switch (ib_event->event) {
1012 case IB_CM_REQ_ERROR:
1013 case IB_CM_REP_ERROR:
1014 event.event = RDMA_CM_EVENT_UNREACHABLE;
1015 event.status = -ETIMEDOUT;
1016 break;
1017 case IB_CM_REP_RECEIVED:
1018 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1019 if (event.status)
1020 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1021 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
1022 event.status = cma_rep_recv(id_priv);
1023 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1024 RDMA_CM_EVENT_ESTABLISHED;
1025 } else
1026 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1027 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1028 ib_event->private_data);
1029 break;
1030 case IB_CM_RTU_RECEIVED:
1031 case IB_CM_USER_ESTABLISHED:
1032 event.event = RDMA_CM_EVENT_ESTABLISHED;
1033 break;
1034 case IB_CM_DREQ_ERROR:
1035 event.status = -ETIMEDOUT; /* fall through */
1036 case IB_CM_DREQ_RECEIVED:
1037 case IB_CM_DREP_RECEIVED:
1038 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1039 RDMA_CM_DISCONNECT))
1040 goto out;
1041 event.event = RDMA_CM_EVENT_DISCONNECTED;
1042 break;
1043 case IB_CM_TIMEWAIT_EXIT:
1044 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1045 break;
1046 case IB_CM_MRA_RECEIVED:
1047 /* ignore event */
1048 goto out;
1049 case IB_CM_REJ_RECEIVED:
1050 cma_modify_qp_err(id_priv);
1051 event.status = ib_event->param.rej_rcvd.reason;
1052 event.event = RDMA_CM_EVENT_REJECTED;
1053 event.param.conn.private_data = ib_event->private_data;
1054 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1055 break;
1056 default:
1057 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1058 ib_event->event);
1059 goto out;
1060 }
1061
1062 ret = id_priv->id.event_handler(&id_priv->id, &event);
1063 if (ret) {
1064 /* Destroy the CM ID by returning a non-zero value. */
1065 id_priv->cm_id.ib = NULL;
1066 cma_exch(id_priv, RDMA_CM_DESTROYING);
1067 mutex_unlock(&id_priv->handler_mutex);
1068 rdma_destroy_id(&id_priv->id);
1069 return ret;
1070 }
1071 out:
1072 mutex_unlock(&id_priv->handler_mutex);
1073 return ret;
1074 }
1075
1076 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1077 struct ib_cm_event *ib_event)
1078 {
1079 struct rdma_id_private *id_priv;
1080 struct rdma_cm_id *id;
1081 struct rdma_route *rt;
1082 union cma_ip_addr *src, *dst;
1083 __be16 port;
1084 u8 ip_ver;
1085 int ret;
1086
1087 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1088 &ip_ver, &port, &src, &dst))
1089 return NULL;
1090
1091 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1092 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1093 if (IS_ERR(id))
1094 return NULL;
1095
1096 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1097 ip_ver, port, src, dst);
1098
1099 rt = &id->route;
1100 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1101 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1102 GFP_KERNEL);
1103 if (!rt->path_rec)
1104 goto err;
1105
1106 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1107 if (rt->num_paths == 2)
1108 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1109
1110 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1111 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1112 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1113 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1114 } else {
1115 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1116 &rt->addr.dev_addr);
1117 if (ret)
1118 goto err;
1119 }
1120 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1121
1122 id_priv = container_of(id, struct rdma_id_private, id);
1123 id_priv->state = RDMA_CM_CONNECT;
1124 return id_priv;
1125
1126 err:
1127 rdma_destroy_id(id);
1128 return NULL;
1129 }
1130
1131 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1132 struct ib_cm_event *ib_event)
1133 {
1134 struct rdma_id_private *id_priv;
1135 struct rdma_cm_id *id;
1136 union cma_ip_addr *src, *dst;
1137 __be16 port;
1138 u8 ip_ver;
1139 int ret;
1140
1141 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1142 listen_id->ps, IB_QPT_UD);
1143 if (IS_ERR(id))
1144 return NULL;
1145
1146
1147 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1148 &ip_ver, &port, &src, &dst))
1149 goto err;
1150
1151 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1152 ip_ver, port, src, dst);
1153
1154 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1155 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1156 &id->route.addr.dev_addr);
1157 if (ret)
1158 goto err;
1159 }
1160
1161 id_priv = container_of(id, struct rdma_id_private, id);
1162 id_priv->state = RDMA_CM_CONNECT;
1163 return id_priv;
1164 err:
1165 rdma_destroy_id(id);
1166 return NULL;
1167 }
1168
1169 static void cma_set_req_event_data(struct rdma_cm_event *event,
1170 struct ib_cm_req_event_param *req_data,
1171 void *private_data, int offset)
1172 {
1173 event->param.conn.private_data = private_data + offset;
1174 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1175 event->param.conn.responder_resources = req_data->responder_resources;
1176 event->param.conn.initiator_depth = req_data->initiator_depth;
1177 event->param.conn.flow_control = req_data->flow_control;
1178 event->param.conn.retry_count = req_data->retry_count;
1179 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1180 event->param.conn.srq = req_data->srq;
1181 event->param.conn.qp_num = req_data->remote_qpn;
1182 }
1183
1184 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1185 {
1186 return (((ib_event->event == IB_CM_REQ_RECEIVED) ||
1187 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1188 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1189 (id->qp_type == IB_QPT_UD)) ||
1190 (!id->qp_type));
1191 }
1192
1193 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1194 {
1195 struct rdma_id_private *listen_id, *conn_id;
1196 struct rdma_cm_event event;
1197 int offset, ret;
1198
1199 listen_id = cm_id->context;
1200 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1201 return -EINVAL;
1202
1203 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1204 return -ECONNABORTED;
1205
1206 memset(&event, 0, sizeof event);
1207 offset = cma_user_data_offset(listen_id->id.ps);
1208 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1209 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1210 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1211 event.param.ud.private_data = ib_event->private_data + offset;
1212 event.param.ud.private_data_len =
1213 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1214 } else {
1215 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1216 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1217 ib_event->private_data, offset);
1218 }
1219 if (!conn_id) {
1220 ret = -ENOMEM;
1221 goto out;
1222 }
1223
1224 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1225 ret = cma_acquire_dev(conn_id);
1226 if (ret)
1227 goto release_conn_id;
1228
1229 conn_id->cm_id.ib = cm_id;
1230 cm_id->context = conn_id;
1231 cm_id->cm_handler = cma_ib_handler;
1232
1233 /*
1234 * Protect against the user destroying conn_id from another thread
1235 * until we're done accessing it.
1236 */
1237 atomic_inc(&conn_id->refcount);
1238 ret = conn_id->id.event_handler(&conn_id->id, &event);
1239 if (!ret) {
1240 /*
1241 * Acquire mutex to prevent user executing rdma_destroy_id()
1242 * while we're accessing the cm_id.
1243 */
1244 mutex_lock(&lock);
1245 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1246 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1247 mutex_unlock(&lock);
1248 mutex_unlock(&conn_id->handler_mutex);
1249 cma_deref_id(conn_id);
1250 goto out;
1251 }
1252 cma_deref_id(conn_id);
1253
1254 /* Destroy the CM ID by returning a non-zero value. */
1255 conn_id->cm_id.ib = NULL;
1256
1257 release_conn_id:
1258 cma_exch(conn_id, RDMA_CM_DESTROYING);
1259 mutex_unlock(&conn_id->handler_mutex);
1260 rdma_destroy_id(&conn_id->id);
1261
1262 out:
1263 mutex_unlock(&listen_id->handler_mutex);
1264 return ret;
1265 }
1266
1267 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1268 {
1269 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1270 }
1271
1272 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1273 struct ib_cm_compare_data *compare)
1274 {
1275 struct cma_hdr *cma_data, *cma_mask;
1276 struct sdp_hh *sdp_data, *sdp_mask;
1277 __be32 ip4_addr;
1278 struct in6_addr ip6_addr;
1279
1280 memset(compare, 0, sizeof *compare);
1281 cma_data = (void *) compare->data;
1282 cma_mask = (void *) compare->mask;
1283 sdp_data = (void *) compare->data;
1284 sdp_mask = (void *) compare->mask;
1285
1286 switch (addr->sa_family) {
1287 case AF_INET:
1288 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1289 if (ps == RDMA_PS_SDP) {
1290 sdp_set_ip_ver(sdp_data, 4);
1291 sdp_set_ip_ver(sdp_mask, 0xF);
1292 sdp_data->dst_addr.ip4.addr = ip4_addr;
1293 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1294 } else {
1295 cma_set_ip_ver(cma_data, 4);
1296 cma_set_ip_ver(cma_mask, 0xF);
1297 cma_data->dst_addr.ip4.addr = ip4_addr;
1298 cma_mask->dst_addr.ip4.addr = htonl(~0);
1299 }
1300 break;
1301 case AF_INET6:
1302 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1303 if (ps == RDMA_PS_SDP) {
1304 sdp_set_ip_ver(sdp_data, 6);
1305 sdp_set_ip_ver(sdp_mask, 0xF);
1306 sdp_data->dst_addr.ip6 = ip6_addr;
1307 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1308 sizeof sdp_mask->dst_addr.ip6);
1309 } else {
1310 cma_set_ip_ver(cma_data, 6);
1311 cma_set_ip_ver(cma_mask, 0xF);
1312 cma_data->dst_addr.ip6 = ip6_addr;
1313 memset(&cma_mask->dst_addr.ip6, 0xFF,
1314 sizeof cma_mask->dst_addr.ip6);
1315 }
1316 break;
1317 default:
1318 break;
1319 }
1320 }
1321
1322 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1323 {
1324 struct rdma_id_private *id_priv = iw_id->context;
1325 struct rdma_cm_event event;
1326 struct sockaddr_in *sin;
1327 int ret = 0;
1328
1329 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1330 return 0;
1331
1332 memset(&event, 0, sizeof event);
1333 switch (iw_event->event) {
1334 case IW_CM_EVENT_CLOSE:
1335 event.event = RDMA_CM_EVENT_DISCONNECTED;
1336 break;
1337 case IW_CM_EVENT_CONNECT_REPLY:
1338 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1339 *sin = iw_event->local_addr;
1340 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1341 *sin = iw_event->remote_addr;
1342 switch (iw_event->status) {
1343 case 0:
1344 event.event = RDMA_CM_EVENT_ESTABLISHED;
1345 event.param.conn.initiator_depth = iw_event->ird;
1346 event.param.conn.responder_resources = iw_event->ord;
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 event.param.conn.initiator_depth = iw_event->ird;
1363 event.param.conn.responder_resources = iw_event->ord;
1364 break;
1365 default:
1366 BUG_ON(1);
1367 }
1368
1369 event.status = iw_event->status;
1370 event.param.conn.private_data = iw_event->private_data;
1371 event.param.conn.private_data_len = iw_event->private_data_len;
1372 ret = id_priv->id.event_handler(&id_priv->id, &event);
1373 if (ret) {
1374 /* Destroy the CM ID by returning a non-zero value. */
1375 id_priv->cm_id.iw = NULL;
1376 cma_exch(id_priv, RDMA_CM_DESTROYING);
1377 mutex_unlock(&id_priv->handler_mutex);
1378 rdma_destroy_id(&id_priv->id);
1379 return ret;
1380 }
1381
1382 mutex_unlock(&id_priv->handler_mutex);
1383 return ret;
1384 }
1385
1386 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1387 struct iw_cm_event *iw_event)
1388 {
1389 struct rdma_cm_id *new_cm_id;
1390 struct rdma_id_private *listen_id, *conn_id;
1391 struct sockaddr_in *sin;
1392 struct net_device *dev = NULL;
1393 struct rdma_cm_event event;
1394 int ret;
1395 struct ib_device_attr attr;
1396
1397 listen_id = cm_id->context;
1398 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1399 return -ECONNABORTED;
1400
1401 /* Create a new RDMA id for the new IW CM ID */
1402 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1403 listen_id->id.context,
1404 RDMA_PS_TCP, IB_QPT_RC);
1405 if (IS_ERR(new_cm_id)) {
1406 ret = -ENOMEM;
1407 goto out;
1408 }
1409 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1410 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1411 conn_id->state = RDMA_CM_CONNECT;
1412
1413 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1414 if (!dev) {
1415 ret = -EADDRNOTAVAIL;
1416 mutex_unlock(&conn_id->handler_mutex);
1417 rdma_destroy_id(new_cm_id);
1418 goto out;
1419 }
1420 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1421 if (ret) {
1422 mutex_unlock(&conn_id->handler_mutex);
1423 rdma_destroy_id(new_cm_id);
1424 goto out;
1425 }
1426
1427 ret = cma_acquire_dev(conn_id);
1428 if (ret) {
1429 mutex_unlock(&conn_id->handler_mutex);
1430 rdma_destroy_id(new_cm_id);
1431 goto out;
1432 }
1433
1434 conn_id->cm_id.iw = cm_id;
1435 cm_id->context = conn_id;
1436 cm_id->cm_handler = cma_iw_handler;
1437
1438 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1439 *sin = iw_event->local_addr;
1440 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1441 *sin = iw_event->remote_addr;
1442
1443 ret = ib_query_device(conn_id->id.device, &attr);
1444 if (ret) {
1445 mutex_unlock(&conn_id->handler_mutex);
1446 rdma_destroy_id(new_cm_id);
1447 goto out;
1448 }
1449
1450 memset(&event, 0, sizeof event);
1451 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1452 event.param.conn.private_data = iw_event->private_data;
1453 event.param.conn.private_data_len = iw_event->private_data_len;
1454 event.param.conn.initiator_depth = iw_event->ird;
1455 event.param.conn.responder_resources = iw_event->ord;
1456
1457 /*
1458 * Protect against the user destroying conn_id from another thread
1459 * until we're done accessing it.
1460 */
1461 atomic_inc(&conn_id->refcount);
1462 ret = conn_id->id.event_handler(&conn_id->id, &event);
1463 if (ret) {
1464 /* User wants to destroy the CM ID */
1465 conn_id->cm_id.iw = NULL;
1466 cma_exch(conn_id, RDMA_CM_DESTROYING);
1467 mutex_unlock(&conn_id->handler_mutex);
1468 cma_deref_id(conn_id);
1469 rdma_destroy_id(&conn_id->id);
1470 goto out;
1471 }
1472
1473 mutex_unlock(&conn_id->handler_mutex);
1474 cma_deref_id(conn_id);
1475
1476 out:
1477 if (dev)
1478 dev_put(dev);
1479 mutex_unlock(&listen_id->handler_mutex);
1480 return ret;
1481 }
1482
1483 static int cma_ib_listen(struct rdma_id_private *id_priv)
1484 {
1485 struct ib_cm_compare_data compare_data;
1486 struct sockaddr *addr;
1487 struct ib_cm_id *id;
1488 __be64 svc_id;
1489 int ret;
1490
1491 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1492 if (IS_ERR(id))
1493 return PTR_ERR(id);
1494
1495 id_priv->cm_id.ib = id;
1496
1497 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1498 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1499 if (cma_any_addr(addr))
1500 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1501 else {
1502 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1503 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1504 }
1505
1506 if (ret) {
1507 ib_destroy_cm_id(id_priv->cm_id.ib);
1508 id_priv->cm_id.ib = NULL;
1509 }
1510
1511 return ret;
1512 }
1513
1514 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1515 {
1516 int ret;
1517 struct sockaddr_in *sin;
1518 struct iw_cm_id *id;
1519
1520 id = iw_create_cm_id(id_priv->id.device,
1521 iw_conn_req_handler,
1522 id_priv);
1523 if (IS_ERR(id))
1524 return PTR_ERR(id);
1525
1526 id_priv->cm_id.iw = id;
1527
1528 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1529 id_priv->cm_id.iw->local_addr = *sin;
1530
1531 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1532
1533 if (ret) {
1534 iw_destroy_cm_id(id_priv->cm_id.iw);
1535 id_priv->cm_id.iw = NULL;
1536 }
1537
1538 return ret;
1539 }
1540
1541 static int cma_listen_handler(struct rdma_cm_id *id,
1542 struct rdma_cm_event *event)
1543 {
1544 struct rdma_id_private *id_priv = id->context;
1545
1546 id->context = id_priv->id.context;
1547 id->event_handler = id_priv->id.event_handler;
1548 return id_priv->id.event_handler(id, event);
1549 }
1550
1551 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1552 struct cma_device *cma_dev)
1553 {
1554 struct rdma_id_private *dev_id_priv;
1555 struct rdma_cm_id *id;
1556 int ret;
1557
1558 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1559 id_priv->id.qp_type);
1560 if (IS_ERR(id))
1561 return;
1562
1563 dev_id_priv = container_of(id, struct rdma_id_private, id);
1564
1565 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1566 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1567 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1568
1569 cma_attach_to_dev(dev_id_priv, cma_dev);
1570 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1571 atomic_inc(&id_priv->refcount);
1572 dev_id_priv->internal_id = 1;
1573
1574 ret = rdma_listen(id, id_priv->backlog);
1575 if (ret)
1576 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1577 "listening on device %s\n", ret, cma_dev->device->name);
1578 }
1579
1580 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1581 {
1582 struct cma_device *cma_dev;
1583
1584 mutex_lock(&lock);
1585 list_add_tail(&id_priv->list, &listen_any_list);
1586 list_for_each_entry(cma_dev, &dev_list, list)
1587 cma_listen_on_dev(id_priv, cma_dev);
1588 mutex_unlock(&lock);
1589 }
1590
1591 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1592 {
1593 struct rdma_id_private *id_priv;
1594
1595 id_priv = container_of(id, struct rdma_id_private, id);
1596 id_priv->tos = (u8) tos;
1597 }
1598 EXPORT_SYMBOL(rdma_set_service_type);
1599
1600 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1601 void *context)
1602 {
1603 struct cma_work *work = context;
1604 struct rdma_route *route;
1605
1606 route = &work->id->id.route;
1607
1608 if (!status) {
1609 route->num_paths = 1;
1610 *route->path_rec = *path_rec;
1611 } else {
1612 work->old_state = RDMA_CM_ROUTE_QUERY;
1613 work->new_state = RDMA_CM_ADDR_RESOLVED;
1614 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1615 work->event.status = status;
1616 }
1617
1618 queue_work(cma_wq, &work->work);
1619 }
1620
1621 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1622 struct cma_work *work)
1623 {
1624 struct rdma_addr *addr = &id_priv->id.route.addr;
1625 struct ib_sa_path_rec path_rec;
1626 ib_sa_comp_mask comp_mask;
1627 struct sockaddr_in6 *sin6;
1628
1629 memset(&path_rec, 0, sizeof path_rec);
1630 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1631 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1632 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1633 path_rec.numb_path = 1;
1634 path_rec.reversible = 1;
1635 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1636 (struct sockaddr *) &addr->dst_addr);
1637
1638 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1639 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1640 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1641
1642 if (addr->src_addr.ss_family == AF_INET) {
1643 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1644 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1645 } else {
1646 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1647 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1648 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1649 }
1650
1651 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1652 id_priv->id.port_num, &path_rec,
1653 comp_mask, timeout_ms,
1654 GFP_KERNEL, cma_query_handler,
1655 work, &id_priv->query);
1656
1657 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1658 }
1659
1660 static void cma_work_handler(struct work_struct *_work)
1661 {
1662 struct cma_work *work = container_of(_work, struct cma_work, work);
1663 struct rdma_id_private *id_priv = work->id;
1664 int destroy = 0;
1665
1666 mutex_lock(&id_priv->handler_mutex);
1667 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1668 goto out;
1669
1670 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1671 cma_exch(id_priv, RDMA_CM_DESTROYING);
1672 destroy = 1;
1673 }
1674 out:
1675 mutex_unlock(&id_priv->handler_mutex);
1676 cma_deref_id(id_priv);
1677 if (destroy)
1678 rdma_destroy_id(&id_priv->id);
1679 kfree(work);
1680 }
1681
1682 static void cma_ndev_work_handler(struct work_struct *_work)
1683 {
1684 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1685 struct rdma_id_private *id_priv = work->id;
1686 int destroy = 0;
1687
1688 mutex_lock(&id_priv->handler_mutex);
1689 if (id_priv->state == RDMA_CM_DESTROYING ||
1690 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1691 goto out;
1692
1693 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1694 cma_exch(id_priv, RDMA_CM_DESTROYING);
1695 destroy = 1;
1696 }
1697
1698 out:
1699 mutex_unlock(&id_priv->handler_mutex);
1700 cma_deref_id(id_priv);
1701 if (destroy)
1702 rdma_destroy_id(&id_priv->id);
1703 kfree(work);
1704 }
1705
1706 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1707 {
1708 struct rdma_route *route = &id_priv->id.route;
1709 struct cma_work *work;
1710 int ret;
1711
1712 work = kzalloc(sizeof *work, GFP_KERNEL);
1713 if (!work)
1714 return -ENOMEM;
1715
1716 work->id = id_priv;
1717 INIT_WORK(&work->work, cma_work_handler);
1718 work->old_state = RDMA_CM_ROUTE_QUERY;
1719 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1720 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1721
1722 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1723 if (!route->path_rec) {
1724 ret = -ENOMEM;
1725 goto err1;
1726 }
1727
1728 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1729 if (ret)
1730 goto err2;
1731
1732 return 0;
1733 err2:
1734 kfree(route->path_rec);
1735 route->path_rec = NULL;
1736 err1:
1737 kfree(work);
1738 return ret;
1739 }
1740
1741 int rdma_set_ib_paths(struct rdma_cm_id *id,
1742 struct ib_sa_path_rec *path_rec, int num_paths)
1743 {
1744 struct rdma_id_private *id_priv;
1745 int ret;
1746
1747 id_priv = container_of(id, struct rdma_id_private, id);
1748 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1749 RDMA_CM_ROUTE_RESOLVED))
1750 return -EINVAL;
1751
1752 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1753 GFP_KERNEL);
1754 if (!id->route.path_rec) {
1755 ret = -ENOMEM;
1756 goto err;
1757 }
1758
1759 id->route.num_paths = num_paths;
1760 return 0;
1761 err:
1762 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1763 return ret;
1764 }
1765 EXPORT_SYMBOL(rdma_set_ib_paths);
1766
1767 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1768 {
1769 struct cma_work *work;
1770
1771 work = kzalloc(sizeof *work, GFP_KERNEL);
1772 if (!work)
1773 return -ENOMEM;
1774
1775 work->id = id_priv;
1776 INIT_WORK(&work->work, cma_work_handler);
1777 work->old_state = RDMA_CM_ROUTE_QUERY;
1778 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1779 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1780 queue_work(cma_wq, &work->work);
1781 return 0;
1782 }
1783
1784 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1785 {
1786 struct rdma_route *route = &id_priv->id.route;
1787 struct rdma_addr *addr = &route->addr;
1788 struct cma_work *work;
1789 int ret;
1790 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1791 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1792 struct net_device *ndev = NULL;
1793 u16 vid;
1794
1795 if (src_addr->sin_family != dst_addr->sin_family)
1796 return -EINVAL;
1797
1798 work = kzalloc(sizeof *work, GFP_KERNEL);
1799 if (!work)
1800 return -ENOMEM;
1801
1802 work->id = id_priv;
1803 INIT_WORK(&work->work, cma_work_handler);
1804
1805 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1806 if (!route->path_rec) {
1807 ret = -ENOMEM;
1808 goto err1;
1809 }
1810
1811 route->num_paths = 1;
1812
1813 if (addr->dev_addr.bound_dev_if)
1814 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1815 if (!ndev) {
1816 ret = -ENODEV;
1817 goto err2;
1818 }
1819
1820 vid = rdma_vlan_dev_vlan_id(ndev);
1821
1822 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1823 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1824
1825 route->path_rec->hop_limit = 1;
1826 route->path_rec->reversible = 1;
1827 route->path_rec->pkey = cpu_to_be16(0xffff);
1828 route->path_rec->mtu_selector = IB_SA_EQ;
1829 route->path_rec->sl = id_priv->tos >> 5;
1830
1831 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1832 route->path_rec->rate_selector = IB_SA_EQ;
1833 route->path_rec->rate = iboe_get_rate(ndev);
1834 dev_put(ndev);
1835 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1836 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1837 if (!route->path_rec->mtu) {
1838 ret = -EINVAL;
1839 goto err2;
1840 }
1841
1842 work->old_state = RDMA_CM_ROUTE_QUERY;
1843 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1844 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1845 work->event.status = 0;
1846
1847 queue_work(cma_wq, &work->work);
1848
1849 return 0;
1850
1851 err2:
1852 kfree(route->path_rec);
1853 route->path_rec = NULL;
1854 err1:
1855 kfree(work);
1856 return ret;
1857 }
1858
1859 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1860 {
1861 struct rdma_id_private *id_priv;
1862 int ret;
1863
1864 id_priv = container_of(id, struct rdma_id_private, id);
1865 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1866 return -EINVAL;
1867
1868 atomic_inc(&id_priv->refcount);
1869 switch (rdma_node_get_transport(id->device->node_type)) {
1870 case RDMA_TRANSPORT_IB:
1871 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1872 case IB_LINK_LAYER_INFINIBAND:
1873 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1874 break;
1875 case IB_LINK_LAYER_ETHERNET:
1876 ret = cma_resolve_iboe_route(id_priv);
1877 break;
1878 default:
1879 ret = -ENOSYS;
1880 }
1881 break;
1882 case RDMA_TRANSPORT_IWARP:
1883 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1884 break;
1885 default:
1886 ret = -ENOSYS;
1887 break;
1888 }
1889 if (ret)
1890 goto err;
1891
1892 return 0;
1893 err:
1894 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1895 cma_deref_id(id_priv);
1896 return ret;
1897 }
1898 EXPORT_SYMBOL(rdma_resolve_route);
1899
1900 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1901 {
1902 struct cma_device *cma_dev;
1903 struct ib_port_attr port_attr;
1904 union ib_gid gid;
1905 u16 pkey;
1906 int ret;
1907 u8 p;
1908
1909 mutex_lock(&lock);
1910 if (list_empty(&dev_list)) {
1911 ret = -ENODEV;
1912 goto out;
1913 }
1914 list_for_each_entry(cma_dev, &dev_list, list)
1915 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1916 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1917 port_attr.state == IB_PORT_ACTIVE)
1918 goto port_found;
1919
1920 p = 1;
1921 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1922
1923 port_found:
1924 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1925 if (ret)
1926 goto out;
1927
1928 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1929 if (ret)
1930 goto out;
1931
1932 id_priv->id.route.addr.dev_addr.dev_type =
1933 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1934 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1935
1936 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1937 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1938 id_priv->id.port_num = p;
1939 cma_attach_to_dev(id_priv, cma_dev);
1940 out:
1941 mutex_unlock(&lock);
1942 return ret;
1943 }
1944
1945 static void addr_handler(int status, struct sockaddr *src_addr,
1946 struct rdma_dev_addr *dev_addr, void *context)
1947 {
1948 struct rdma_id_private *id_priv = context;
1949 struct rdma_cm_event event;
1950
1951 memset(&event, 0, sizeof event);
1952 mutex_lock(&id_priv->handler_mutex);
1953 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
1954 RDMA_CM_ADDR_RESOLVED))
1955 goto out;
1956
1957 if (!status && !id_priv->cma_dev)
1958 status = cma_acquire_dev(id_priv);
1959
1960 if (status) {
1961 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1962 RDMA_CM_ADDR_BOUND))
1963 goto out;
1964 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1965 event.status = status;
1966 } else {
1967 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1968 ip_addr_size(src_addr));
1969 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1970 }
1971
1972 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1973 cma_exch(id_priv, RDMA_CM_DESTROYING);
1974 mutex_unlock(&id_priv->handler_mutex);
1975 cma_deref_id(id_priv);
1976 rdma_destroy_id(&id_priv->id);
1977 return;
1978 }
1979 out:
1980 mutex_unlock(&id_priv->handler_mutex);
1981 cma_deref_id(id_priv);
1982 }
1983
1984 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1985 {
1986 struct cma_work *work;
1987 struct sockaddr *src, *dst;
1988 union ib_gid gid;
1989 int ret;
1990
1991 work = kzalloc(sizeof *work, GFP_KERNEL);
1992 if (!work)
1993 return -ENOMEM;
1994
1995 if (!id_priv->cma_dev) {
1996 ret = cma_bind_loopback(id_priv);
1997 if (ret)
1998 goto err;
1999 }
2000
2001 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2002 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2003
2004 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2005 if (cma_zero_addr(src)) {
2006 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2007 if ((src->sa_family = dst->sa_family) == AF_INET) {
2008 ((struct sockaddr_in *) src)->sin_addr.s_addr =
2009 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2010 } else {
2011 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
2012 &((struct sockaddr_in6 *) dst)->sin6_addr);
2013 }
2014 }
2015
2016 work->id = id_priv;
2017 INIT_WORK(&work->work, cma_work_handler);
2018 work->old_state = RDMA_CM_ADDR_QUERY;
2019 work->new_state = RDMA_CM_ADDR_RESOLVED;
2020 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2021 queue_work(cma_wq, &work->work);
2022 return 0;
2023 err:
2024 kfree(work);
2025 return ret;
2026 }
2027
2028 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2029 struct sockaddr *dst_addr)
2030 {
2031 if (!src_addr || !src_addr->sa_family) {
2032 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2033 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2034 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2035 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2036 }
2037 }
2038 return rdma_bind_addr(id, src_addr);
2039 }
2040
2041 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2042 struct sockaddr *dst_addr, int timeout_ms)
2043 {
2044 struct rdma_id_private *id_priv;
2045 int ret;
2046
2047 id_priv = container_of(id, struct rdma_id_private, id);
2048 if (id_priv->state == RDMA_CM_IDLE) {
2049 ret = cma_bind_addr(id, src_addr, dst_addr);
2050 if (ret)
2051 return ret;
2052 }
2053
2054 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2055 return -EINVAL;
2056
2057 atomic_inc(&id_priv->refcount);
2058 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2059 if (cma_any_addr(dst_addr))
2060 ret = cma_resolve_loopback(id_priv);
2061 else
2062 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2063 dst_addr, &id->route.addr.dev_addr,
2064 timeout_ms, addr_handler, id_priv);
2065 if (ret)
2066 goto err;
2067
2068 return 0;
2069 err:
2070 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2071 cma_deref_id(id_priv);
2072 return ret;
2073 }
2074 EXPORT_SYMBOL(rdma_resolve_addr);
2075
2076 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2077 {
2078 struct rdma_id_private *id_priv;
2079 unsigned long flags;
2080 int ret;
2081
2082 id_priv = container_of(id, struct rdma_id_private, id);
2083 spin_lock_irqsave(&id_priv->lock, flags);
2084 if (id_priv->state == RDMA_CM_IDLE) {
2085 id_priv->reuseaddr = reuse;
2086 ret = 0;
2087 } else {
2088 ret = -EINVAL;
2089 }
2090 spin_unlock_irqrestore(&id_priv->lock, flags);
2091 return ret;
2092 }
2093 EXPORT_SYMBOL(rdma_set_reuseaddr);
2094
2095 static void cma_bind_port(struct rdma_bind_list *bind_list,
2096 struct rdma_id_private *id_priv)
2097 {
2098 struct sockaddr_in *sin;
2099
2100 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2101 sin->sin_port = htons(bind_list->port);
2102 id_priv->bind_list = bind_list;
2103 hlist_add_head(&id_priv->node, &bind_list->owners);
2104 }
2105
2106 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2107 unsigned short snum)
2108 {
2109 struct rdma_bind_list *bind_list;
2110 int port, ret;
2111
2112 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2113 if (!bind_list)
2114 return -ENOMEM;
2115
2116 do {
2117 ret = idr_get_new_above(ps, bind_list, snum, &port);
2118 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2119
2120 if (ret)
2121 goto err1;
2122
2123 if (port != snum) {
2124 ret = -EADDRNOTAVAIL;
2125 goto err2;
2126 }
2127
2128 bind_list->ps = ps;
2129 bind_list->port = (unsigned short) port;
2130 cma_bind_port(bind_list, id_priv);
2131 return 0;
2132 err2:
2133 idr_remove(ps, port);
2134 err1:
2135 kfree(bind_list);
2136 return ret;
2137 }
2138
2139 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2140 {
2141 static unsigned int last_used_port;
2142 int low, high, remaining;
2143 unsigned int rover;
2144
2145 inet_get_local_port_range(&low, &high);
2146 remaining = (high - low) + 1;
2147 rover = net_random() % remaining + low;
2148 retry:
2149 if (last_used_port != rover &&
2150 !idr_find(ps, (unsigned short) rover)) {
2151 int ret = cma_alloc_port(ps, id_priv, rover);
2152 /*
2153 * Remember previously used port number in order to avoid
2154 * re-using same port immediately after it is closed.
2155 */
2156 if (!ret)
2157 last_used_port = rover;
2158 if (ret != -EADDRNOTAVAIL)
2159 return ret;
2160 }
2161 if (--remaining) {
2162 rover++;
2163 if ((rover < low) || (rover > high))
2164 rover = low;
2165 goto retry;
2166 }
2167 return -EADDRNOTAVAIL;
2168 }
2169
2170 /*
2171 * Check that the requested port is available. This is called when trying to
2172 * bind to a specific port, or when trying to listen on a bound port. In
2173 * the latter case, the provided id_priv may already be on the bind_list, but
2174 * we still need to check that it's okay to start listening.
2175 */
2176 static int cma_check_port(struct rdma_bind_list *bind_list,
2177 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2178 {
2179 struct rdma_id_private *cur_id;
2180 struct sockaddr *addr, *cur_addr;
2181 struct hlist_node *node;
2182
2183 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2184 if (cma_any_addr(addr) && !reuseaddr)
2185 return -EADDRNOTAVAIL;
2186
2187 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2188 if (id_priv == cur_id)
2189 continue;
2190
2191 if ((cur_id->state == RDMA_CM_LISTEN) ||
2192 !reuseaddr || !cur_id->reuseaddr) {
2193 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2194 if (cma_any_addr(cur_addr))
2195 return -EADDRNOTAVAIL;
2196
2197 if (!cma_addr_cmp(addr, cur_addr))
2198 return -EADDRINUSE;
2199 }
2200 }
2201 return 0;
2202 }
2203
2204 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2205 {
2206 struct rdma_bind_list *bind_list;
2207 unsigned short snum;
2208 int ret;
2209
2210 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2211 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2212 return -EACCES;
2213
2214 bind_list = idr_find(ps, snum);
2215 if (!bind_list) {
2216 ret = cma_alloc_port(ps, id_priv, snum);
2217 } else {
2218 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2219 if (!ret)
2220 cma_bind_port(bind_list, id_priv);
2221 }
2222 return ret;
2223 }
2224
2225 static int cma_bind_listen(struct rdma_id_private *id_priv)
2226 {
2227 struct rdma_bind_list *bind_list = id_priv->bind_list;
2228 int ret = 0;
2229
2230 mutex_lock(&lock);
2231 if (bind_list->owners.first->next)
2232 ret = cma_check_port(bind_list, id_priv, 0);
2233 mutex_unlock(&lock);
2234 return ret;
2235 }
2236
2237 static int cma_get_port(struct rdma_id_private *id_priv)
2238 {
2239 struct idr *ps;
2240 int ret;
2241
2242 switch (id_priv->id.ps) {
2243 case RDMA_PS_SDP:
2244 ps = &sdp_ps;
2245 break;
2246 case RDMA_PS_TCP:
2247 ps = &tcp_ps;
2248 break;
2249 case RDMA_PS_UDP:
2250 ps = &udp_ps;
2251 break;
2252 case RDMA_PS_IPOIB:
2253 ps = &ipoib_ps;
2254 break;
2255 case RDMA_PS_IB:
2256 ps = &ib_ps;
2257 break;
2258 default:
2259 return -EPROTONOSUPPORT;
2260 }
2261
2262 mutex_lock(&lock);
2263 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2264 ret = cma_alloc_any_port(ps, id_priv);
2265 else
2266 ret = cma_use_port(ps, id_priv);
2267 mutex_unlock(&lock);
2268
2269 return ret;
2270 }
2271
2272 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2273 struct sockaddr *addr)
2274 {
2275 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2276 struct sockaddr_in6 *sin6;
2277
2278 if (addr->sa_family != AF_INET6)
2279 return 0;
2280
2281 sin6 = (struct sockaddr_in6 *) addr;
2282 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2283 !sin6->sin6_scope_id)
2284 return -EINVAL;
2285
2286 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2287 #endif
2288 return 0;
2289 }
2290
2291 int rdma_listen(struct rdma_cm_id *id, int backlog)
2292 {
2293 struct rdma_id_private *id_priv;
2294 int ret;
2295
2296 id_priv = container_of(id, struct rdma_id_private, id);
2297 if (id_priv->state == RDMA_CM_IDLE) {
2298 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2299 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2300 if (ret)
2301 return ret;
2302 }
2303
2304 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2305 return -EINVAL;
2306
2307 if (id_priv->reuseaddr) {
2308 ret = cma_bind_listen(id_priv);
2309 if (ret)
2310 goto err;
2311 }
2312
2313 id_priv->backlog = backlog;
2314 if (id->device) {
2315 switch (rdma_node_get_transport(id->device->node_type)) {
2316 case RDMA_TRANSPORT_IB:
2317 ret = cma_ib_listen(id_priv);
2318 if (ret)
2319 goto err;
2320 break;
2321 case RDMA_TRANSPORT_IWARP:
2322 ret = cma_iw_listen(id_priv, backlog);
2323 if (ret)
2324 goto err;
2325 break;
2326 default:
2327 ret = -ENOSYS;
2328 goto err;
2329 }
2330 } else
2331 cma_listen_on_all(id_priv);
2332
2333 return 0;
2334 err:
2335 id_priv->backlog = 0;
2336 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2337 return ret;
2338 }
2339 EXPORT_SYMBOL(rdma_listen);
2340
2341 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2342 {
2343 struct rdma_id_private *id_priv;
2344 int ret;
2345
2346 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2347 return -EAFNOSUPPORT;
2348
2349 id_priv = container_of(id, struct rdma_id_private, id);
2350 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2351 return -EINVAL;
2352
2353 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2354 if (ret)
2355 goto err1;
2356
2357 if (!cma_any_addr(addr)) {
2358 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2359 if (ret)
2360 goto err1;
2361
2362 ret = cma_acquire_dev(id_priv);
2363 if (ret)
2364 goto err1;
2365 }
2366
2367 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2368 ret = cma_get_port(id_priv);
2369 if (ret)
2370 goto err2;
2371
2372 return 0;
2373 err2:
2374 if (id_priv->cma_dev)
2375 cma_release_dev(id_priv);
2376 err1:
2377 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2378 return ret;
2379 }
2380 EXPORT_SYMBOL(rdma_bind_addr);
2381
2382 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2383 struct rdma_route *route)
2384 {
2385 struct cma_hdr *cma_hdr;
2386 struct sdp_hh *sdp_hdr;
2387
2388 if (route->addr.src_addr.ss_family == AF_INET) {
2389 struct sockaddr_in *src4, *dst4;
2390
2391 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2392 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2393
2394 switch (ps) {
2395 case RDMA_PS_SDP:
2396 sdp_hdr = hdr;
2397 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2398 return -EINVAL;
2399 sdp_set_ip_ver(sdp_hdr, 4);
2400 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2401 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2402 sdp_hdr->port = src4->sin_port;
2403 break;
2404 default:
2405 cma_hdr = hdr;
2406 cma_hdr->cma_version = CMA_VERSION;
2407 cma_set_ip_ver(cma_hdr, 4);
2408 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2409 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2410 cma_hdr->port = src4->sin_port;
2411 break;
2412 }
2413 } else {
2414 struct sockaddr_in6 *src6, *dst6;
2415
2416 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2417 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2418
2419 switch (ps) {
2420 case RDMA_PS_SDP:
2421 sdp_hdr = hdr;
2422 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2423 return -EINVAL;
2424 sdp_set_ip_ver(sdp_hdr, 6);
2425 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2426 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2427 sdp_hdr->port = src6->sin6_port;
2428 break;
2429 default:
2430 cma_hdr = hdr;
2431 cma_hdr->cma_version = CMA_VERSION;
2432 cma_set_ip_ver(cma_hdr, 6);
2433 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2434 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2435 cma_hdr->port = src6->sin6_port;
2436 break;
2437 }
2438 }
2439 return 0;
2440 }
2441
2442 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2443 struct ib_cm_event *ib_event)
2444 {
2445 struct rdma_id_private *id_priv = cm_id->context;
2446 struct rdma_cm_event event;
2447 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2448 int ret = 0;
2449
2450 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2451 return 0;
2452
2453 memset(&event, 0, sizeof event);
2454 switch (ib_event->event) {
2455 case IB_CM_SIDR_REQ_ERROR:
2456 event.event = RDMA_CM_EVENT_UNREACHABLE;
2457 event.status = -ETIMEDOUT;
2458 break;
2459 case IB_CM_SIDR_REP_RECEIVED:
2460 event.param.ud.private_data = ib_event->private_data;
2461 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2462 if (rep->status != IB_SIDR_SUCCESS) {
2463 event.event = RDMA_CM_EVENT_UNREACHABLE;
2464 event.status = ib_event->param.sidr_rep_rcvd.status;
2465 break;
2466 }
2467 ret = cma_set_qkey(id_priv);
2468 if (ret) {
2469 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2470 event.status = -EINVAL;
2471 break;
2472 }
2473 if (id_priv->qkey != rep->qkey) {
2474 event.event = RDMA_CM_EVENT_UNREACHABLE;
2475 event.status = -EINVAL;
2476 break;
2477 }
2478 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2479 id_priv->id.route.path_rec,
2480 &event.param.ud.ah_attr);
2481 event.param.ud.qp_num = rep->qpn;
2482 event.param.ud.qkey = rep->qkey;
2483 event.event = RDMA_CM_EVENT_ESTABLISHED;
2484 event.status = 0;
2485 break;
2486 default:
2487 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2488 ib_event->event);
2489 goto out;
2490 }
2491
2492 ret = id_priv->id.event_handler(&id_priv->id, &event);
2493 if (ret) {
2494 /* Destroy the CM ID by returning a non-zero value. */
2495 id_priv->cm_id.ib = NULL;
2496 cma_exch(id_priv, RDMA_CM_DESTROYING);
2497 mutex_unlock(&id_priv->handler_mutex);
2498 rdma_destroy_id(&id_priv->id);
2499 return ret;
2500 }
2501 out:
2502 mutex_unlock(&id_priv->handler_mutex);
2503 return ret;
2504 }
2505
2506 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2507 struct rdma_conn_param *conn_param)
2508 {
2509 struct ib_cm_sidr_req_param req;
2510 struct rdma_route *route;
2511 struct ib_cm_id *id;
2512 int ret;
2513
2514 req.private_data_len = sizeof(struct cma_hdr) +
2515 conn_param->private_data_len;
2516 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2517 if (!req.private_data)
2518 return -ENOMEM;
2519
2520 if (conn_param->private_data && conn_param->private_data_len)
2521 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2522 conn_param->private_data, conn_param->private_data_len);
2523
2524 route = &id_priv->id.route;
2525 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2526 if (ret)
2527 goto out;
2528
2529 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2530 id_priv);
2531 if (IS_ERR(id)) {
2532 ret = PTR_ERR(id);
2533 goto out;
2534 }
2535 id_priv->cm_id.ib = id;
2536
2537 req.path = route->path_rec;
2538 req.service_id = cma_get_service_id(id_priv->id.ps,
2539 (struct sockaddr *) &route->addr.dst_addr);
2540 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2541 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2542
2543 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2544 if (ret) {
2545 ib_destroy_cm_id(id_priv->cm_id.ib);
2546 id_priv->cm_id.ib = NULL;
2547 }
2548 out:
2549 kfree(req.private_data);
2550 return ret;
2551 }
2552
2553 static int cma_connect_ib(struct rdma_id_private *id_priv,
2554 struct rdma_conn_param *conn_param)
2555 {
2556 struct ib_cm_req_param req;
2557 struct rdma_route *route;
2558 void *private_data;
2559 struct ib_cm_id *id;
2560 int offset, ret;
2561
2562 memset(&req, 0, sizeof req);
2563 offset = cma_user_data_offset(id_priv->id.ps);
2564 req.private_data_len = offset + conn_param->private_data_len;
2565 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2566 if (!private_data)
2567 return -ENOMEM;
2568
2569 if (conn_param->private_data && conn_param->private_data_len)
2570 memcpy(private_data + offset, conn_param->private_data,
2571 conn_param->private_data_len);
2572
2573 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2574 if (IS_ERR(id)) {
2575 ret = PTR_ERR(id);
2576 goto out;
2577 }
2578 id_priv->cm_id.ib = id;
2579
2580 route = &id_priv->id.route;
2581 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2582 if (ret)
2583 goto out;
2584 req.private_data = private_data;
2585
2586 req.primary_path = &route->path_rec[0];
2587 if (route->num_paths == 2)
2588 req.alternate_path = &route->path_rec[1];
2589
2590 req.service_id = cma_get_service_id(id_priv->id.ps,
2591 (struct sockaddr *) &route->addr.dst_addr);
2592 req.qp_num = id_priv->qp_num;
2593 req.qp_type = id_priv->id.qp_type;
2594 req.starting_psn = id_priv->seq_num;
2595 req.responder_resources = conn_param->responder_resources;
2596 req.initiator_depth = conn_param->initiator_depth;
2597 req.flow_control = conn_param->flow_control;
2598 req.retry_count = conn_param->retry_count;
2599 req.rnr_retry_count = conn_param->rnr_retry_count;
2600 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2601 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2602 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2603 req.srq = id_priv->srq ? 1 : 0;
2604
2605 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2606 out:
2607 if (ret && !IS_ERR(id)) {
2608 ib_destroy_cm_id(id);
2609 id_priv->cm_id.ib = NULL;
2610 }
2611
2612 kfree(private_data);
2613 return ret;
2614 }
2615
2616 static int cma_connect_iw(struct rdma_id_private *id_priv,
2617 struct rdma_conn_param *conn_param)
2618 {
2619 struct iw_cm_id *cm_id;
2620 struct sockaddr_in* sin;
2621 int ret;
2622 struct iw_cm_conn_param iw_param;
2623
2624 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2625 if (IS_ERR(cm_id))
2626 return PTR_ERR(cm_id);
2627
2628 id_priv->cm_id.iw = cm_id;
2629
2630 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2631 cm_id->local_addr = *sin;
2632
2633 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2634 cm_id->remote_addr = *sin;
2635
2636 ret = cma_modify_qp_rtr(id_priv, conn_param);
2637 if (ret)
2638 goto out;
2639
2640 if (conn_param) {
2641 iw_param.ord = conn_param->initiator_depth;
2642 iw_param.ird = conn_param->responder_resources;
2643 iw_param.private_data = conn_param->private_data;
2644 iw_param.private_data_len = conn_param->private_data_len;
2645 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2646 } else {
2647 memset(&iw_param, 0, sizeof iw_param);
2648 iw_param.qpn = id_priv->qp_num;
2649 }
2650 ret = iw_cm_connect(cm_id, &iw_param);
2651 out:
2652 if (ret) {
2653 iw_destroy_cm_id(cm_id);
2654 id_priv->cm_id.iw = NULL;
2655 }
2656 return ret;
2657 }
2658
2659 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2660 {
2661 struct rdma_id_private *id_priv;
2662 int ret;
2663
2664 id_priv = container_of(id, struct rdma_id_private, id);
2665 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2666 return -EINVAL;
2667
2668 if (!id->qp) {
2669 id_priv->qp_num = conn_param->qp_num;
2670 id_priv->srq = conn_param->srq;
2671 }
2672
2673 switch (rdma_node_get_transport(id->device->node_type)) {
2674 case RDMA_TRANSPORT_IB:
2675 if (id->qp_type == IB_QPT_UD)
2676 ret = cma_resolve_ib_udp(id_priv, conn_param);
2677 else
2678 ret = cma_connect_ib(id_priv, conn_param);
2679 break;
2680 case RDMA_TRANSPORT_IWARP:
2681 ret = cma_connect_iw(id_priv, conn_param);
2682 break;
2683 default:
2684 ret = -ENOSYS;
2685 break;
2686 }
2687 if (ret)
2688 goto err;
2689
2690 return 0;
2691 err:
2692 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2693 return ret;
2694 }
2695 EXPORT_SYMBOL(rdma_connect);
2696
2697 static int cma_accept_ib(struct rdma_id_private *id_priv,
2698 struct rdma_conn_param *conn_param)
2699 {
2700 struct ib_cm_rep_param rep;
2701 int ret;
2702
2703 ret = cma_modify_qp_rtr(id_priv, conn_param);
2704 if (ret)
2705 goto out;
2706
2707 ret = cma_modify_qp_rts(id_priv, conn_param);
2708 if (ret)
2709 goto out;
2710
2711 memset(&rep, 0, sizeof rep);
2712 rep.qp_num = id_priv->qp_num;
2713 rep.starting_psn = id_priv->seq_num;
2714 rep.private_data = conn_param->private_data;
2715 rep.private_data_len = conn_param->private_data_len;
2716 rep.responder_resources = conn_param->responder_resources;
2717 rep.initiator_depth = conn_param->initiator_depth;
2718 rep.failover_accepted = 0;
2719 rep.flow_control = conn_param->flow_control;
2720 rep.rnr_retry_count = conn_param->rnr_retry_count;
2721 rep.srq = id_priv->srq ? 1 : 0;
2722
2723 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2724 out:
2725 return ret;
2726 }
2727
2728 static int cma_accept_iw(struct rdma_id_private *id_priv,
2729 struct rdma_conn_param *conn_param)
2730 {
2731 struct iw_cm_conn_param iw_param;
2732 int ret;
2733
2734 ret = cma_modify_qp_rtr(id_priv, conn_param);
2735 if (ret)
2736 return ret;
2737
2738 iw_param.ord = conn_param->initiator_depth;
2739 iw_param.ird = conn_param->responder_resources;
2740 iw_param.private_data = conn_param->private_data;
2741 iw_param.private_data_len = conn_param->private_data_len;
2742 if (id_priv->id.qp) {
2743 iw_param.qpn = id_priv->qp_num;
2744 } else
2745 iw_param.qpn = conn_param->qp_num;
2746
2747 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2748 }
2749
2750 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2751 enum ib_cm_sidr_status status,
2752 const void *private_data, int private_data_len)
2753 {
2754 struct ib_cm_sidr_rep_param rep;
2755 int ret;
2756
2757 memset(&rep, 0, sizeof rep);
2758 rep.status = status;
2759 if (status == IB_SIDR_SUCCESS) {
2760 ret = cma_set_qkey(id_priv);
2761 if (ret)
2762 return ret;
2763 rep.qp_num = id_priv->qp_num;
2764 rep.qkey = id_priv->qkey;
2765 }
2766 rep.private_data = private_data;
2767 rep.private_data_len = private_data_len;
2768
2769 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2770 }
2771
2772 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2773 {
2774 struct rdma_id_private *id_priv;
2775 int ret;
2776
2777 id_priv = container_of(id, struct rdma_id_private, id);
2778
2779 id_priv->owner = task_pid_nr(current);
2780
2781 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2782 return -EINVAL;
2783
2784 if (!id->qp && conn_param) {
2785 id_priv->qp_num = conn_param->qp_num;
2786 id_priv->srq = conn_param->srq;
2787 }
2788
2789 switch (rdma_node_get_transport(id->device->node_type)) {
2790 case RDMA_TRANSPORT_IB:
2791 if (id->qp_type == IB_QPT_UD) {
2792 if (conn_param)
2793 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2794 conn_param->private_data,
2795 conn_param->private_data_len);
2796 else
2797 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2798 NULL, 0);
2799 } else {
2800 if (conn_param)
2801 ret = cma_accept_ib(id_priv, conn_param);
2802 else
2803 ret = cma_rep_recv(id_priv);
2804 }
2805 break;
2806 case RDMA_TRANSPORT_IWARP:
2807 ret = cma_accept_iw(id_priv, conn_param);
2808 break;
2809 default:
2810 ret = -ENOSYS;
2811 break;
2812 }
2813
2814 if (ret)
2815 goto reject;
2816
2817 return 0;
2818 reject:
2819 cma_modify_qp_err(id_priv);
2820 rdma_reject(id, NULL, 0);
2821 return ret;
2822 }
2823 EXPORT_SYMBOL(rdma_accept);
2824
2825 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2826 {
2827 struct rdma_id_private *id_priv;
2828 int ret;
2829
2830 id_priv = container_of(id, struct rdma_id_private, id);
2831 if (!id_priv->cm_id.ib)
2832 return -EINVAL;
2833
2834 switch (id->device->node_type) {
2835 case RDMA_NODE_IB_CA:
2836 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2837 break;
2838 default:
2839 ret = 0;
2840 break;
2841 }
2842 return ret;
2843 }
2844 EXPORT_SYMBOL(rdma_notify);
2845
2846 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2847 u8 private_data_len)
2848 {
2849 struct rdma_id_private *id_priv;
2850 int ret;
2851
2852 id_priv = container_of(id, struct rdma_id_private, id);
2853 if (!id_priv->cm_id.ib)
2854 return -EINVAL;
2855
2856 switch (rdma_node_get_transport(id->device->node_type)) {
2857 case RDMA_TRANSPORT_IB:
2858 if (id->qp_type == IB_QPT_UD)
2859 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2860 private_data, private_data_len);
2861 else
2862 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2863 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2864 0, private_data, private_data_len);
2865 break;
2866 case RDMA_TRANSPORT_IWARP:
2867 ret = iw_cm_reject(id_priv->cm_id.iw,
2868 private_data, private_data_len);
2869 break;
2870 default:
2871 ret = -ENOSYS;
2872 break;
2873 }
2874 return ret;
2875 }
2876 EXPORT_SYMBOL(rdma_reject);
2877
2878 int rdma_disconnect(struct rdma_cm_id *id)
2879 {
2880 struct rdma_id_private *id_priv;
2881 int ret;
2882
2883 id_priv = container_of(id, struct rdma_id_private, id);
2884 if (!id_priv->cm_id.ib)
2885 return -EINVAL;
2886
2887 switch (rdma_node_get_transport(id->device->node_type)) {
2888 case RDMA_TRANSPORT_IB:
2889 ret = cma_modify_qp_err(id_priv);
2890 if (ret)
2891 goto out;
2892 /* Initiate or respond to a disconnect. */
2893 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2894 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2895 break;
2896 case RDMA_TRANSPORT_IWARP:
2897 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2898 break;
2899 default:
2900 ret = -EINVAL;
2901 break;
2902 }
2903 out:
2904 return ret;
2905 }
2906 EXPORT_SYMBOL(rdma_disconnect);
2907
2908 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2909 {
2910 struct rdma_id_private *id_priv;
2911 struct cma_multicast *mc = multicast->context;
2912 struct rdma_cm_event event;
2913 int ret;
2914
2915 id_priv = mc->id_priv;
2916 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
2917 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
2918 return 0;
2919
2920 mutex_lock(&id_priv->qp_mutex);
2921 if (!status && id_priv->id.qp)
2922 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2923 multicast->rec.mlid);
2924 mutex_unlock(&id_priv->qp_mutex);
2925
2926 memset(&event, 0, sizeof event);
2927 event.status = status;
2928 event.param.ud.private_data = mc->context;
2929 if (!status) {
2930 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2931 ib_init_ah_from_mcmember(id_priv->id.device,
2932 id_priv->id.port_num, &multicast->rec,
2933 &event.param.ud.ah_attr);
2934 event.param.ud.qp_num = 0xFFFFFF;
2935 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2936 } else
2937 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2938
2939 ret = id_priv->id.event_handler(&id_priv->id, &event);
2940 if (ret) {
2941 cma_exch(id_priv, RDMA_CM_DESTROYING);
2942 mutex_unlock(&id_priv->handler_mutex);
2943 rdma_destroy_id(&id_priv->id);
2944 return 0;
2945 }
2946
2947 mutex_unlock(&id_priv->handler_mutex);
2948 return 0;
2949 }
2950
2951 static void cma_set_mgid(struct rdma_id_private *id_priv,
2952 struct sockaddr *addr, union ib_gid *mgid)
2953 {
2954 unsigned char mc_map[MAX_ADDR_LEN];
2955 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2956 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2957 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2958
2959 if (cma_any_addr(addr)) {
2960 memset(mgid, 0, sizeof *mgid);
2961 } else if ((addr->sa_family == AF_INET6) &&
2962 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
2963 0xFF10A01B)) {
2964 /* IPv6 address is an SA assigned MGID. */
2965 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2966 } else if ((addr->sa_family == AF_INET6)) {
2967 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2968 if (id_priv->id.ps == RDMA_PS_UDP)
2969 mc_map[7] = 0x01; /* Use RDMA CM signature */
2970 *mgid = *(union ib_gid *) (mc_map + 4);
2971 } else {
2972 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
2973 if (id_priv->id.ps == RDMA_PS_UDP)
2974 mc_map[7] = 0x01; /* Use RDMA CM signature */
2975 *mgid = *(union ib_gid *) (mc_map + 4);
2976 }
2977 }
2978
2979 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2980 struct cma_multicast *mc)
2981 {
2982 struct ib_sa_mcmember_rec rec;
2983 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2984 ib_sa_comp_mask comp_mask;
2985 int ret;
2986
2987 ib_addr_get_mgid(dev_addr, &rec.mgid);
2988 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2989 &rec.mgid, &rec);
2990 if (ret)
2991 return ret;
2992
2993 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
2994 if (id_priv->id.ps == RDMA_PS_UDP)
2995 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2996 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
2997 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2998 rec.join_state = 1;
2999
3000 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3001 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3002 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3003 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3004 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3005
3006 if (id_priv->id.ps == RDMA_PS_IPOIB)
3007 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3008 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
3009
3010 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3011 id_priv->id.port_num, &rec,
3012 comp_mask, GFP_KERNEL,
3013 cma_ib_mc_handler, mc);
3014 if (IS_ERR(mc->multicast.ib))
3015 return PTR_ERR(mc->multicast.ib);
3016
3017 return 0;
3018 }
3019
3020 static void iboe_mcast_work_handler(struct work_struct *work)
3021 {
3022 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3023 struct cma_multicast *mc = mw->mc;
3024 struct ib_sa_multicast *m = mc->multicast.ib;
3025
3026 mc->multicast.ib->context = mc;
3027 cma_ib_mc_handler(0, m);
3028 kref_put(&mc->mcref, release_mc);
3029 kfree(mw);
3030 }
3031
3032 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3033 {
3034 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3035 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3036
3037 if (cma_any_addr(addr)) {
3038 memset(mgid, 0, sizeof *mgid);
3039 } else if (addr->sa_family == AF_INET6) {
3040 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3041 } else {
3042 mgid->raw[0] = 0xff;
3043 mgid->raw[1] = 0x0e;
3044 mgid->raw[2] = 0;
3045 mgid->raw[3] = 0;
3046 mgid->raw[4] = 0;
3047 mgid->raw[5] = 0;
3048 mgid->raw[6] = 0;
3049 mgid->raw[7] = 0;
3050 mgid->raw[8] = 0;
3051 mgid->raw[9] = 0;
3052 mgid->raw[10] = 0xff;
3053 mgid->raw[11] = 0xff;
3054 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3055 }
3056 }
3057
3058 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3059 struct cma_multicast *mc)
3060 {
3061 struct iboe_mcast_work *work;
3062 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3063 int err;
3064 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3065 struct net_device *ndev = NULL;
3066
3067 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3068 return -EINVAL;
3069
3070 work = kzalloc(sizeof *work, GFP_KERNEL);
3071 if (!work)
3072 return -ENOMEM;
3073
3074 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3075 if (!mc->multicast.ib) {
3076 err = -ENOMEM;
3077 goto out1;
3078 }
3079
3080 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3081
3082 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3083 if (id_priv->id.ps == RDMA_PS_UDP)
3084 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3085
3086 if (dev_addr->bound_dev_if)
3087 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3088 if (!ndev) {
3089 err = -ENODEV;
3090 goto out2;
3091 }
3092 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3093 mc->multicast.ib->rec.hop_limit = 1;
3094 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3095 dev_put(ndev);
3096 if (!mc->multicast.ib->rec.mtu) {
3097 err = -EINVAL;
3098 goto out2;
3099 }
3100 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3101 work->id = id_priv;
3102 work->mc = mc;
3103 INIT_WORK(&work->work, iboe_mcast_work_handler);
3104 kref_get(&mc->mcref);
3105 queue_work(cma_wq, &work->work);
3106
3107 return 0;
3108
3109 out2:
3110 kfree(mc->multicast.ib);
3111 out1:
3112 kfree(work);
3113 return err;
3114 }
3115
3116 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3117 void *context)
3118 {
3119 struct rdma_id_private *id_priv;
3120 struct cma_multicast *mc;
3121 int ret;
3122
3123 id_priv = container_of(id, struct rdma_id_private, id);
3124 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3125 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3126 return -EINVAL;
3127
3128 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3129 if (!mc)
3130 return -ENOMEM;
3131
3132 memcpy(&mc->addr, addr, ip_addr_size(addr));
3133 mc->context = context;
3134 mc->id_priv = id_priv;
3135
3136 spin_lock(&id_priv->lock);
3137 list_add(&mc->list, &id_priv->mc_list);
3138 spin_unlock(&id_priv->lock);
3139
3140 switch (rdma_node_get_transport(id->device->node_type)) {
3141 case RDMA_TRANSPORT_IB:
3142 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3143 case IB_LINK_LAYER_INFINIBAND:
3144 ret = cma_join_ib_multicast(id_priv, mc);
3145 break;
3146 case IB_LINK_LAYER_ETHERNET:
3147 kref_init(&mc->mcref);
3148 ret = cma_iboe_join_multicast(id_priv, mc);
3149 break;
3150 default:
3151 ret = -EINVAL;
3152 }
3153 break;
3154 default:
3155 ret = -ENOSYS;
3156 break;
3157 }
3158
3159 if (ret) {
3160 spin_lock_irq(&id_priv->lock);
3161 list_del(&mc->list);
3162 spin_unlock_irq(&id_priv->lock);
3163 kfree(mc);
3164 }
3165 return ret;
3166 }
3167 EXPORT_SYMBOL(rdma_join_multicast);
3168
3169 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3170 {
3171 struct rdma_id_private *id_priv;
3172 struct cma_multicast *mc;
3173
3174 id_priv = container_of(id, struct rdma_id_private, id);
3175 spin_lock_irq(&id_priv->lock);
3176 list_for_each_entry(mc, &id_priv->mc_list, list) {
3177 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3178 list_del(&mc->list);
3179 spin_unlock_irq(&id_priv->lock);
3180
3181 if (id->qp)
3182 ib_detach_mcast(id->qp,
3183 &mc->multicast.ib->rec.mgid,
3184 mc->multicast.ib->rec.mlid);
3185 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3186 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3187 case IB_LINK_LAYER_INFINIBAND:
3188 ib_sa_free_multicast(mc->multicast.ib);
3189 kfree(mc);
3190 break;
3191 case IB_LINK_LAYER_ETHERNET:
3192 kref_put(&mc->mcref, release_mc);
3193 break;
3194 default:
3195 break;
3196 }
3197 }
3198 return;
3199 }
3200 }
3201 spin_unlock_irq(&id_priv->lock);
3202 }
3203 EXPORT_SYMBOL(rdma_leave_multicast);
3204
3205 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3206 {
3207 struct rdma_dev_addr *dev_addr;
3208 struct cma_ndev_work *work;
3209
3210 dev_addr = &id_priv->id.route.addr.dev_addr;
3211
3212 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3213 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3214 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3215 ndev->name, &id_priv->id);
3216 work = kzalloc(sizeof *work, GFP_KERNEL);
3217 if (!work)
3218 return -ENOMEM;
3219
3220 INIT_WORK(&work->work, cma_ndev_work_handler);
3221 work->id = id_priv;
3222 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3223 atomic_inc(&id_priv->refcount);
3224 queue_work(cma_wq, &work->work);
3225 }
3226
3227 return 0;
3228 }
3229
3230 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3231 void *ctx)
3232 {
3233 struct net_device *ndev = (struct net_device *)ctx;
3234 struct cma_device *cma_dev;
3235 struct rdma_id_private *id_priv;
3236 int ret = NOTIFY_DONE;
3237
3238 if (dev_net(ndev) != &init_net)
3239 return NOTIFY_DONE;
3240
3241 if (event != NETDEV_BONDING_FAILOVER)
3242 return NOTIFY_DONE;
3243
3244 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3245 return NOTIFY_DONE;
3246
3247 mutex_lock(&lock);
3248 list_for_each_entry(cma_dev, &dev_list, list)
3249 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3250 ret = cma_netdev_change(ndev, id_priv);
3251 if (ret)
3252 goto out;
3253 }
3254
3255 out:
3256 mutex_unlock(&lock);
3257 return ret;
3258 }
3259
3260 static struct notifier_block cma_nb = {
3261 .notifier_call = cma_netdev_callback
3262 };
3263
3264 static void cma_add_one(struct ib_device *device)
3265 {
3266 struct cma_device *cma_dev;
3267 struct rdma_id_private *id_priv;
3268
3269 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3270 if (!cma_dev)
3271 return;
3272
3273 cma_dev->device = device;
3274
3275 init_completion(&cma_dev->comp);
3276 atomic_set(&cma_dev->refcount, 1);
3277 INIT_LIST_HEAD(&cma_dev->id_list);
3278 ib_set_client_data(device, &cma_client, cma_dev);
3279
3280 mutex_lock(&lock);
3281 list_add_tail(&cma_dev->list, &dev_list);
3282 list_for_each_entry(id_priv, &listen_any_list, list)
3283 cma_listen_on_dev(id_priv, cma_dev);
3284 mutex_unlock(&lock);
3285 }
3286
3287 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3288 {
3289 struct rdma_cm_event event;
3290 enum rdma_cm_state state;
3291 int ret = 0;
3292
3293 /* Record that we want to remove the device */
3294 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3295 if (state == RDMA_CM_DESTROYING)
3296 return 0;
3297
3298 cma_cancel_operation(id_priv, state);
3299 mutex_lock(&id_priv->handler_mutex);
3300
3301 /* Check for destruction from another callback. */
3302 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3303 goto out;
3304
3305 memset(&event, 0, sizeof event);
3306 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3307 ret = id_priv->id.event_handler(&id_priv->id, &event);
3308 out:
3309 mutex_unlock(&id_priv->handler_mutex);
3310 return ret;
3311 }
3312
3313 static void cma_process_remove(struct cma_device *cma_dev)
3314 {
3315 struct rdma_id_private *id_priv;
3316 int ret;
3317
3318 mutex_lock(&lock);
3319 while (!list_empty(&cma_dev->id_list)) {
3320 id_priv = list_entry(cma_dev->id_list.next,
3321 struct rdma_id_private, list);
3322
3323 list_del(&id_priv->listen_list);
3324 list_del_init(&id_priv->list);
3325 atomic_inc(&id_priv->refcount);
3326 mutex_unlock(&lock);
3327
3328 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3329 cma_deref_id(id_priv);
3330 if (ret)
3331 rdma_destroy_id(&id_priv->id);
3332
3333 mutex_lock(&lock);
3334 }
3335 mutex_unlock(&lock);
3336
3337 cma_deref_dev(cma_dev);
3338 wait_for_completion(&cma_dev->comp);
3339 }
3340
3341 static void cma_remove_one(struct ib_device *device)
3342 {
3343 struct cma_device *cma_dev;
3344
3345 cma_dev = ib_get_client_data(device, &cma_client);
3346 if (!cma_dev)
3347 return;
3348
3349 mutex_lock(&lock);
3350 list_del(&cma_dev->list);
3351 mutex_unlock(&lock);
3352
3353 cma_process_remove(cma_dev);
3354 kfree(cma_dev);
3355 }
3356
3357 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3358 {
3359 struct nlmsghdr *nlh;
3360 struct rdma_cm_id_stats *id_stats;
3361 struct rdma_id_private *id_priv;
3362 struct rdma_cm_id *id = NULL;
3363 struct cma_device *cma_dev;
3364 int i_dev = 0, i_id = 0;
3365
3366 /*
3367 * We export all of the IDs as a sequence of messages. Each
3368 * ID gets its own netlink message.
3369 */
3370 mutex_lock(&lock);
3371
3372 list_for_each_entry(cma_dev, &dev_list, list) {
3373 if (i_dev < cb->args[0]) {
3374 i_dev++;
3375 continue;
3376 }
3377
3378 i_id = 0;
3379 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3380 if (i_id < cb->args[1]) {
3381 i_id++;
3382 continue;
3383 }
3384
3385 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3386 sizeof *id_stats, RDMA_NL_RDMA_CM,
3387 RDMA_NL_RDMA_CM_ID_STATS);
3388 if (!id_stats)
3389 goto out;
3390
3391 memset(id_stats, 0, sizeof *id_stats);
3392 id = &id_priv->id;
3393 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3394 id_stats->port_num = id->port_num;
3395 id_stats->bound_dev_if =
3396 id->route.addr.dev_addr.bound_dev_if;
3397
3398 if (id->route.addr.src_addr.ss_family == AF_INET) {
3399 if (ibnl_put_attr(skb, nlh,
3400 sizeof(struct sockaddr_in),
3401 &id->route.addr.src_addr,
3402 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3403 goto out;
3404 }
3405 if (ibnl_put_attr(skb, nlh,
3406 sizeof(struct sockaddr_in),
3407 &id->route.addr.dst_addr,
3408 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3409 goto out;
3410 }
3411 } else if (id->route.addr.src_addr.ss_family == AF_INET6) {
3412 if (ibnl_put_attr(skb, nlh,
3413 sizeof(struct sockaddr_in6),
3414 &id->route.addr.src_addr,
3415 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3416 goto out;
3417 }
3418 if (ibnl_put_attr(skb, nlh,
3419 sizeof(struct sockaddr_in6),
3420 &id->route.addr.dst_addr,
3421 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3422 goto out;
3423 }
3424 }
3425
3426 id_stats->pid = id_priv->owner;
3427 id_stats->port_space = id->ps;
3428 id_stats->cm_state = id_priv->state;
3429 id_stats->qp_num = id_priv->qp_num;
3430 id_stats->qp_type = id->qp_type;
3431
3432 i_id++;
3433 }
3434
3435 cb->args[1] = 0;
3436 i_dev++;
3437 }
3438
3439 out:
3440 mutex_unlock(&lock);
3441 cb->args[0] = i_dev;
3442 cb->args[1] = i_id;
3443
3444 return skb->len;
3445 }
3446
3447 static const struct ibnl_client_cbs cma_cb_table[] = {
3448 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats },
3449 };
3450
3451 static int __init cma_init(void)
3452 {
3453 int ret;
3454
3455 cma_wq = create_singlethread_workqueue("rdma_cm");
3456 if (!cma_wq)
3457 return -ENOMEM;
3458
3459 ib_sa_register_client(&sa_client);
3460 rdma_addr_register_client(&addr_client);
3461 register_netdevice_notifier(&cma_nb);
3462
3463 ret = ib_register_client(&cma_client);
3464 if (ret)
3465 goto err;
3466
3467 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3468 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3469
3470 return 0;
3471
3472 err:
3473 unregister_netdevice_notifier(&cma_nb);
3474 rdma_addr_unregister_client(&addr_client);
3475 ib_sa_unregister_client(&sa_client);
3476 destroy_workqueue(cma_wq);
3477 return ret;
3478 }
3479
3480 static void __exit cma_cleanup(void)
3481 {
3482 ibnl_remove_client(RDMA_NL_RDMA_CM);
3483 ib_unregister_client(&cma_client);
3484 unregister_netdevice_notifier(&cma_nb);
3485 rdma_addr_unregister_client(&addr_client);
3486 ib_sa_unregister_client(&sa_client);
3487 destroy_workqueue(cma_wq);
3488 idr_destroy(&sdp_ps);
3489 idr_destroy(&tcp_ps);
3490 idr_destroy(&udp_ps);
3491 idr_destroy(&ipoib_ps);
3492 idr_destroy(&ib_ps);
3493 }
3494
3495 module_init(cma_init);
3496 module_exit(cma_cleanup);
Linux kernel - Deliverables
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