projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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 #include <net/route.h>
46
47 #include <net/tcp.h>
48 #include <net/ipv6.h>
49
50 #include <rdma/rdma_cm.h>
51 #include <rdma/rdma_cm_ib.h>
52 #include <rdma/rdma_netlink.h>
53 #include <rdma/ib_cache.h>
54 #include <rdma/ib_cm.h>
55 #include <rdma/ib_sa.h>
56 #include <rdma/iw_cm.h>
57
58 MODULE_AUTHOR("Sean Hefty");
59 MODULE_DESCRIPTION("Generic RDMA CM Agent");
60 MODULE_LICENSE("Dual BSD/GPL");
61
62 #define CMA_CM_RESPONSE_TIMEOUT 20
63 #define CMA_MAX_CM_RETRIES 15
64 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
65 #define CMA_IBOE_PACKET_LIFETIME 18
66
67 static void cma_add_one(struct ib_device *device);
68 static void cma_remove_one(struct ib_device *device);
69
70 static struct ib_client cma_client = {
71 .name = "cma",
72 .add = cma_add_one,
73 .remove = cma_remove_one
74 };
75
76 static struct ib_sa_client sa_client;
77 static struct rdma_addr_client addr_client;
78 static LIST_HEAD(dev_list);
79 static LIST_HEAD(listen_any_list);
80 static DEFINE_MUTEX(lock);
81 static struct workqueue_struct *cma_wq;
82 static DEFINE_IDR(sdp_ps);
83 static DEFINE_IDR(tcp_ps);
84 static DEFINE_IDR(udp_ps);
85 static DEFINE_IDR(ipoib_ps);
86 static DEFINE_IDR(ib_ps);
87
88 struct cma_device {
89 struct list_head list;
90 struct ib_device *device;
91 struct completion comp;
92 atomic_t refcount;
93 struct list_head id_list;
94 };
95
96 struct rdma_bind_list {
97 struct idr *ps;
98 struct hlist_head owners;
99 unsigned short port;
100 };
101
102 /*
103 * Device removal can occur at anytime, so we need extra handling to
104 * serialize notifying the user of device removal with other callbacks.
105 * We do this by disabling removal notification while a callback is in process,
106 * and reporting it after the callback completes.
107 */
108 struct rdma_id_private {
109 struct rdma_cm_id id;
110
111 struct rdma_bind_list *bind_list;
112 struct hlist_node node;
113 struct list_head list; /* listen_any_list or cma_device.list */
114 struct list_head listen_list; /* per device listens */
115 struct cma_device *cma_dev;
116 struct list_head mc_list;
117
118 int internal_id;
119 enum rdma_cm_state state;
120 spinlock_t lock;
121 struct mutex qp_mutex;
122
123 struct completion comp;
124 atomic_t refcount;
125 struct mutex handler_mutex;
126
127 int backlog;
128 int timeout_ms;
129 struct ib_sa_query *query;
130 int query_id;
131 union {
132 struct ib_cm_id *ib;
133 struct iw_cm_id *iw;
134 } cm_id;
135
136 u32 seq_num;
137 u32 qkey;
138 u32 qp_num;
139 pid_t owner;
140 u8 srq;
141 u8 tos;
142 u8 reuseaddr;
143 };
144
145 struct cma_multicast {
146 struct rdma_id_private *id_priv;
147 union {
148 struct ib_sa_multicast *ib;
149 } multicast;
150 struct list_head list;
151 void *context;
152 struct sockaddr_storage addr;
153 struct kref mcref;
154 };
155
156 struct cma_work {
157 struct work_struct work;
158 struct rdma_id_private *id;
159 enum rdma_cm_state old_state;
160 enum rdma_cm_state new_state;
161 struct rdma_cm_event event;
162 };
163
164 struct cma_ndev_work {
165 struct work_struct work;
166 struct rdma_id_private *id;
167 struct rdma_cm_event event;
168 };
169
170 struct iboe_mcast_work {
171 struct work_struct work;
172 struct rdma_id_private *id;
173 struct cma_multicast *mc;
174 };
175
176 union cma_ip_addr {
177 struct in6_addr ip6;
178 struct {
179 __be32 pad[3];
180 __be32 addr;
181 } ip4;
182 };
183
184 struct cma_hdr {
185 u8 cma_version;
186 u8 ip_version; /* IP version: 7:4 */
187 __be16 port;
188 union cma_ip_addr src_addr;
189 union cma_ip_addr dst_addr;
190 };
191
192 struct sdp_hh {
193 u8 bsdh[16];
194 u8 sdp_version; /* Major version: 7:4 */
195 u8 ip_version; /* IP version: 7:4 */
196 u8 sdp_specific1[10];
197 __be16 port;
198 __be16 sdp_specific2;
199 union cma_ip_addr src_addr;
200 union cma_ip_addr dst_addr;
201 };
202
203 struct sdp_hah {
204 u8 bsdh[16];
205 u8 sdp_version;
206 };
207
208 #define CMA_VERSION 0x00
209 #define SDP_MAJ_VERSION 0x2
210
211 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
212 {
213 unsigned long flags;
214 int ret;
215
216 spin_lock_irqsave(&id_priv->lock, flags);
217 ret = (id_priv->state == comp);
218 spin_unlock_irqrestore(&id_priv->lock, flags);
219 return ret;
220 }
221
222 static int cma_comp_exch(struct rdma_id_private *id_priv,
223 enum rdma_cm_state comp, enum rdma_cm_state exch)
224 {
225 unsigned long flags;
226 int ret;
227
228 spin_lock_irqsave(&id_priv->lock, flags);
229 if ((ret = (id_priv->state == comp)))
230 id_priv->state = exch;
231 spin_unlock_irqrestore(&id_priv->lock, flags);
232 return ret;
233 }
234
235 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
236 enum rdma_cm_state exch)
237 {
238 unsigned long flags;
239 enum rdma_cm_state old;
240
241 spin_lock_irqsave(&id_priv->lock, flags);
242 old = id_priv->state;
243 id_priv->state = exch;
244 spin_unlock_irqrestore(&id_priv->lock, flags);
245 return old;
246 }
247
248 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
249 {
250 return hdr->ip_version >> 4;
251 }
252
253 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
254 {
255 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
256 }
257
258 static inline u8 sdp_get_majv(u8 sdp_version)
259 {
260 return sdp_version >> 4;
261 }
262
263 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
264 {
265 return hh->ip_version >> 4;
266 }
267
268 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
269 {
270 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
271 }
272
273 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
274 struct cma_device *cma_dev)
275 {
276 atomic_inc(&cma_dev->refcount);
277 id_priv->cma_dev = cma_dev;
278 id_priv->id.device = cma_dev->device;
279 id_priv->id.route.addr.dev_addr.transport =
280 rdma_node_get_transport(cma_dev->device->node_type);
281 list_add_tail(&id_priv->list, &cma_dev->id_list);
282 }
283
284 static inline void cma_deref_dev(struct cma_device *cma_dev)
285 {
286 if (atomic_dec_and_test(&cma_dev->refcount))
287 complete(&cma_dev->comp);
288 }
289
290 static inline void release_mc(struct kref *kref)
291 {
292 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
293
294 kfree(mc->multicast.ib);
295 kfree(mc);
296 }
297
298 static void cma_release_dev(struct rdma_id_private *id_priv)
299 {
300 mutex_lock(&lock);
301 list_del(&id_priv->list);
302 cma_deref_dev(id_priv->cma_dev);
303 id_priv->cma_dev = NULL;
304 mutex_unlock(&lock);
305 }
306
307 static int cma_set_qkey(struct rdma_id_private *id_priv)
308 {
309 struct ib_sa_mcmember_rec rec;
310 int ret = 0;
311
312 if (id_priv->qkey)
313 return 0;
314
315 switch (id_priv->id.ps) {
316 case RDMA_PS_UDP:
317 id_priv->qkey = RDMA_UDP_QKEY;
318 break;
319 case RDMA_PS_IPOIB:
320 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
321 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
322 id_priv->id.port_num, &rec.mgid,
323 &rec);
324 if (!ret)
325 id_priv->qkey = be32_to_cpu(rec.qkey);
326 break;
327 default:
328 break;
329 }
330 return ret;
331 }
332
333 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
334 {
335 int i;
336 int err;
337 struct ib_port_attr props;
338 union ib_gid tmp;
339
340 err = ib_query_port(device, port_num, &props);
341 if (err)
342 return 1;
343
344 for (i = 0; i < props.gid_tbl_len; ++i) {
345 err = ib_query_gid(device, port_num, i, &tmp);
346 if (err)
347 return 1;
348 if (!memcmp(&tmp, gid, sizeof tmp))
349 return 0;
350 }
351
352 return -EAGAIN;
353 }
354
355 static int cma_acquire_dev(struct rdma_id_private *id_priv)
356 {
357 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
358 struct cma_device *cma_dev;
359 union ib_gid gid, iboe_gid;
360 int ret = -ENODEV;
361 u8 port;
362 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
363 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
364
365 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
366 id_priv->id.ps == RDMA_PS_IPOIB)
367 return -EINVAL;
368
369 mutex_lock(&lock);
370 iboe_addr_get_sgid(dev_addr, &iboe_gid);
371 memcpy(&gid, dev_addr->src_dev_addr +
372 rdma_addr_gid_offset(dev_addr), sizeof gid);
373 list_for_each_entry(cma_dev, &dev_list, list) {
374 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
375 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
376 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
377 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
378 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
379 else
380 ret = find_gid_port(cma_dev->device, &gid, port);
381
382 if (!ret) {
383 id_priv->id.port_num = port;
384 goto out;
385 } else if (ret == 1)
386 break;
387 }
388 }
389 }
390
391 out:
392 if (!ret)
393 cma_attach_to_dev(id_priv, cma_dev);
394
395 mutex_unlock(&lock);
396 return ret;
397 }
398
399 static void cma_deref_id(struct rdma_id_private *id_priv)
400 {
401 if (atomic_dec_and_test(&id_priv->refcount))
402 complete(&id_priv->comp);
403 }
404
405 static int cma_disable_callback(struct rdma_id_private *id_priv,
406 enum rdma_cm_state state)
407 {
408 mutex_lock(&id_priv->handler_mutex);
409 if (id_priv->state != state) {
410 mutex_unlock(&id_priv->handler_mutex);
411 return -EINVAL;
412 }
413 return 0;
414 }
415
416 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
417 void *context, enum rdma_port_space ps,
418 enum ib_qp_type qp_type)
419 {
420 struct rdma_id_private *id_priv;
421
422 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
423 if (!id_priv)
424 return ERR_PTR(-ENOMEM);
425
426 id_priv->owner = task_pid_nr(current);
427 id_priv->state = RDMA_CM_IDLE;
428 id_priv->id.context = context;
429 id_priv->id.event_handler = event_handler;
430 id_priv->id.ps = ps;
431 id_priv->id.qp_type = qp_type;
432 spin_lock_init(&id_priv->lock);
433 mutex_init(&id_priv->qp_mutex);
434 init_completion(&id_priv->comp);
435 atomic_set(&id_priv->refcount, 1);
436 mutex_init(&id_priv->handler_mutex);
437 INIT_LIST_HEAD(&id_priv->listen_list);
438 INIT_LIST_HEAD(&id_priv->mc_list);
439 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
440
441 return &id_priv->id;
442 }
443 EXPORT_SYMBOL(rdma_create_id);
444
445 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
446 {
447 struct ib_qp_attr qp_attr;
448 int qp_attr_mask, ret;
449
450 qp_attr.qp_state = IB_QPS_INIT;
451 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
452 if (ret)
453 return ret;
454
455 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
456 if (ret)
457 return ret;
458
459 qp_attr.qp_state = IB_QPS_RTR;
460 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
461 if (ret)
462 return ret;
463
464 qp_attr.qp_state = IB_QPS_RTS;
465 qp_attr.sq_psn = 0;
466 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
467
468 return ret;
469 }
470
471 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
472 {
473 struct ib_qp_attr qp_attr;
474 int qp_attr_mask, ret;
475
476 qp_attr.qp_state = IB_QPS_INIT;
477 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
478 if (ret)
479 return ret;
480
481 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
482 }
483
484 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
485 struct ib_qp_init_attr *qp_init_attr)
486 {
487 struct rdma_id_private *id_priv;
488 struct ib_qp *qp;
489 int ret;
490
491 id_priv = container_of(id, struct rdma_id_private, id);
492 if (id->device != pd->device)
493 return -EINVAL;
494
495 qp = ib_create_qp(pd, qp_init_attr);
496 if (IS_ERR(qp))
497 return PTR_ERR(qp);
498
499 if (id->qp_type == IB_QPT_UD)
500 ret = cma_init_ud_qp(id_priv, qp);
501 else
502 ret = cma_init_conn_qp(id_priv, qp);
503 if (ret)
504 goto err;
505
506 id->qp = qp;
507 id_priv->qp_num = qp->qp_num;
508 id_priv->srq = (qp->srq != NULL);
509 return 0;
510 err:
511 ib_destroy_qp(qp);
512 return ret;
513 }
514 EXPORT_SYMBOL(rdma_create_qp);
515
516 void rdma_destroy_qp(struct rdma_cm_id *id)
517 {
518 struct rdma_id_private *id_priv;
519
520 id_priv = container_of(id, struct rdma_id_private, id);
521 mutex_lock(&id_priv->qp_mutex);
522 ib_destroy_qp(id_priv->id.qp);
523 id_priv->id.qp = NULL;
524 mutex_unlock(&id_priv->qp_mutex);
525 }
526 EXPORT_SYMBOL(rdma_destroy_qp);
527
528 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
529 struct rdma_conn_param *conn_param)
530 {
531 struct ib_qp_attr qp_attr;
532 int qp_attr_mask, ret;
533
534 mutex_lock(&id_priv->qp_mutex);
535 if (!id_priv->id.qp) {
536 ret = 0;
537 goto out;
538 }
539
540 /* Need to update QP attributes from default values. */
541 qp_attr.qp_state = IB_QPS_INIT;
542 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
543 if (ret)
544 goto out;
545
546 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
547 if (ret)
548 goto out;
549
550 qp_attr.qp_state = IB_QPS_RTR;
551 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
552 if (ret)
553 goto out;
554
555 if (conn_param)
556 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
557 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
558 out:
559 mutex_unlock(&id_priv->qp_mutex);
560 return ret;
561 }
562
563 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
564 struct rdma_conn_param *conn_param)
565 {
566 struct ib_qp_attr qp_attr;
567 int qp_attr_mask, ret;
568
569 mutex_lock(&id_priv->qp_mutex);
570 if (!id_priv->id.qp) {
571 ret = 0;
572 goto out;
573 }
574
575 qp_attr.qp_state = IB_QPS_RTS;
576 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
577 if (ret)
578 goto out;
579
580 if (conn_param)
581 qp_attr.max_rd_atomic = conn_param->initiator_depth;
582 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
583 out:
584 mutex_unlock(&id_priv->qp_mutex);
585 return ret;
586 }
587
588 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
589 {
590 struct ib_qp_attr qp_attr;
591 int ret;
592
593 mutex_lock(&id_priv->qp_mutex);
594 if (!id_priv->id.qp) {
595 ret = 0;
596 goto out;
597 }
598
599 qp_attr.qp_state = IB_QPS_ERR;
600 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
601 out:
602 mutex_unlock(&id_priv->qp_mutex);
603 return ret;
604 }
605
606 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
607 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
608 {
609 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
610 int ret;
611 u16 pkey;
612
613 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
614 IB_LINK_LAYER_INFINIBAND)
615 pkey = ib_addr_get_pkey(dev_addr);
616 else
617 pkey = 0xffff;
618
619 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
620 pkey, &qp_attr->pkey_index);
621 if (ret)
622 return ret;
623
624 qp_attr->port_num = id_priv->id.port_num;
625 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
626
627 if (id_priv->id.qp_type == IB_QPT_UD) {
628 ret = cma_set_qkey(id_priv);
629 if (ret)
630 return ret;
631
632 qp_attr->qkey = id_priv->qkey;
633 *qp_attr_mask |= IB_QP_QKEY;
634 } else {
635 qp_attr->qp_access_flags = 0;
636 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
637 }
638 return 0;
639 }
640
641 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
642 int *qp_attr_mask)
643 {
644 struct rdma_id_private *id_priv;
645 int ret = 0;
646
647 id_priv = container_of(id, struct rdma_id_private, id);
648 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
649 case RDMA_TRANSPORT_IB:
650 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
651 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
652 else
653 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
654 qp_attr_mask);
655 if (qp_attr->qp_state == IB_QPS_RTR)
656 qp_attr->rq_psn = id_priv->seq_num;
657 break;
658 case RDMA_TRANSPORT_IWARP:
659 if (!id_priv->cm_id.iw) {
660 qp_attr->qp_access_flags = 0;
661 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
662 } else
663 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
664 qp_attr_mask);
665 break;
666 default:
667 ret = -ENOSYS;
668 break;
669 }
670
671 return ret;
672 }
673 EXPORT_SYMBOL(rdma_init_qp_attr);
674
675 static inline int cma_zero_addr(struct sockaddr *addr)
676 {
677 struct in6_addr *ip6;
678
679 if (addr->sa_family == AF_INET)
680 return ipv4_is_zeronet(
681 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
682 else {
683 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
684 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
685 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
686 }
687 }
688
689 static inline int cma_loopback_addr(struct sockaddr *addr)
690 {
691 if (addr->sa_family == AF_INET)
692 return ipv4_is_loopback(
693 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
694 else
695 return ipv6_addr_loopback(
696 &((struct sockaddr_in6 *) addr)->sin6_addr);
697 }
698
699 static inline int cma_any_addr(struct sockaddr *addr)
700 {
701 return cma_zero_addr(addr) || cma_loopback_addr(addr);
702 }
703
704 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
705 {
706 if (src->sa_family != dst->sa_family)
707 return -1;
708
709 switch (src->sa_family) {
710 case AF_INET:
711 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
712 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
713 default:
714 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
715 &((struct sockaddr_in6 *) dst)->sin6_addr);
716 }
717 }
718
719 static inline __be16 cma_port(struct sockaddr *addr)
720 {
721 if (addr->sa_family == AF_INET)
722 return ((struct sockaddr_in *) addr)->sin_port;
723 else
724 return ((struct sockaddr_in6 *) addr)->sin6_port;
725 }
726
727 static inline int cma_any_port(struct sockaddr *addr)
728 {
729 return !cma_port(addr);
730 }
731
732 static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
733 u8 *ip_ver, __be16 *port,
734 union cma_ip_addr **src, union cma_ip_addr **dst)
735 {
736 switch (ps) {
737 case RDMA_PS_SDP:
738 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
739 SDP_MAJ_VERSION)
740 return -EINVAL;
741
742 *ip_ver = sdp_get_ip_ver(hdr);
743 *port = ((struct sdp_hh *) hdr)->port;
744 *src = &((struct sdp_hh *) hdr)->src_addr;
745 *dst = &((struct sdp_hh *) hdr)->dst_addr;
746 break;
747 default:
748 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
749 return -EINVAL;
750
751 *ip_ver = cma_get_ip_ver(hdr);
752 *port = ((struct cma_hdr *) hdr)->port;
753 *src = &((struct cma_hdr *) hdr)->src_addr;
754 *dst = &((struct cma_hdr *) hdr)->dst_addr;
755 break;
756 }
757
758 if (*ip_ver != 4 && *ip_ver != 6)
759 return -EINVAL;
760 return 0;
761 }
762
763 static void cma_save_net_info(struct rdma_addr *addr,
764 struct rdma_addr *listen_addr,
765 u8 ip_ver, __be16 port,
766 union cma_ip_addr *src, union cma_ip_addr *dst)
767 {
768 struct sockaddr_in *listen4, *ip4;
769 struct sockaddr_in6 *listen6, *ip6;
770
771 switch (ip_ver) {
772 case 4:
773 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
774 ip4 = (struct sockaddr_in *) &addr->src_addr;
775 ip4->sin_family = listen4->sin_family;
776 ip4->sin_addr.s_addr = dst->ip4.addr;
777 ip4->sin_port = listen4->sin_port;
778
779 ip4 = (struct sockaddr_in *) &addr->dst_addr;
780 ip4->sin_family = listen4->sin_family;
781 ip4->sin_addr.s_addr = src->ip4.addr;
782 ip4->sin_port = port;
783 break;
784 case 6:
785 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
786 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
787 ip6->sin6_family = listen6->sin6_family;
788 ip6->sin6_addr = dst->ip6;
789 ip6->sin6_port = listen6->sin6_port;
790
791 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
792 ip6->sin6_family = listen6->sin6_family;
793 ip6->sin6_addr = src->ip6;
794 ip6->sin6_port = port;
795 break;
796 default:
797 break;
798 }
799 }
800
801 static inline int cma_user_data_offset(enum rdma_port_space ps)
802 {
803 switch (ps) {
804 case RDMA_PS_SDP:
805 return 0;
806 default:
807 return sizeof(struct cma_hdr);
808 }
809 }
810
811 static void cma_cancel_route(struct rdma_id_private *id_priv)
812 {
813 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
814 case IB_LINK_LAYER_INFINIBAND:
815 if (id_priv->query)
816 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
817 break;
818 default:
819 break;
820 }
821 }
822
823 static void cma_cancel_listens(struct rdma_id_private *id_priv)
824 {
825 struct rdma_id_private *dev_id_priv;
826
827 /*
828 * Remove from listen_any_list to prevent added devices from spawning
829 * additional listen requests.
830 */
831 mutex_lock(&lock);
832 list_del(&id_priv->list);
833
834 while (!list_empty(&id_priv->listen_list)) {
835 dev_id_priv = list_entry(id_priv->listen_list.next,
836 struct rdma_id_private, listen_list);
837 /* sync with device removal to avoid duplicate destruction */
838 list_del_init(&dev_id_priv->list);
839 list_del(&dev_id_priv->listen_list);
840 mutex_unlock(&lock);
841
842 rdma_destroy_id(&dev_id_priv->id);
843 mutex_lock(&lock);
844 }
845 mutex_unlock(&lock);
846 }
847
848 static void cma_cancel_operation(struct rdma_id_private *id_priv,
849 enum rdma_cm_state state)
850 {
851 switch (state) {
852 case RDMA_CM_ADDR_QUERY:
853 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
854 break;
855 case RDMA_CM_ROUTE_QUERY:
856 cma_cancel_route(id_priv);
857 break;
858 case RDMA_CM_LISTEN:
859 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
860 && !id_priv->cma_dev)
861 cma_cancel_listens(id_priv);
862 break;
863 default:
864 break;
865 }
866 }
867
868 static void cma_release_port(struct rdma_id_private *id_priv)
869 {
870 struct rdma_bind_list *bind_list = id_priv->bind_list;
871
872 if (!bind_list)
873 return;
874
875 mutex_lock(&lock);
876 hlist_del(&id_priv->node);
877 if (hlist_empty(&bind_list->owners)) {
878 idr_remove(bind_list->ps, bind_list->port);
879 kfree(bind_list);
880 }
881 mutex_unlock(&lock);
882 }
883
884 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
885 {
886 struct cma_multicast *mc;
887
888 while (!list_empty(&id_priv->mc_list)) {
889 mc = container_of(id_priv->mc_list.next,
890 struct cma_multicast, list);
891 list_del(&mc->list);
892 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
893 case IB_LINK_LAYER_INFINIBAND:
894 ib_sa_free_multicast(mc->multicast.ib);
895 kfree(mc);
896 break;
897 case IB_LINK_LAYER_ETHERNET:
898 kref_put(&mc->mcref, release_mc);
899 break;
900 default:
901 break;
902 }
903 }
904 }
905
906 void rdma_destroy_id(struct rdma_cm_id *id)
907 {
908 struct rdma_id_private *id_priv;
909 enum rdma_cm_state state;
910
911 id_priv = container_of(id, struct rdma_id_private, id);
912 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
913 cma_cancel_operation(id_priv, state);
914
915 /*
916 * Wait for any active callback to finish. New callbacks will find
917 * the id_priv state set to destroying and abort.
918 */
919 mutex_lock(&id_priv->handler_mutex);
920 mutex_unlock(&id_priv->handler_mutex);
921
922 if (id_priv->cma_dev) {
923 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
924 case RDMA_TRANSPORT_IB:
925 if (id_priv->cm_id.ib)
926 ib_destroy_cm_id(id_priv->cm_id.ib);
927 break;
928 case RDMA_TRANSPORT_IWARP:
929 if (id_priv->cm_id.iw)
930 iw_destroy_cm_id(id_priv->cm_id.iw);
931 break;
932 default:
933 break;
934 }
935 cma_leave_mc_groups(id_priv);
936 cma_release_dev(id_priv);
937 }
938
939 cma_release_port(id_priv);
940 cma_deref_id(id_priv);
941 wait_for_completion(&id_priv->comp);
942
943 if (id_priv->internal_id)
944 cma_deref_id(id_priv->id.context);
945
946 kfree(id_priv->id.route.path_rec);
947 kfree(id_priv);
948 }
949 EXPORT_SYMBOL(rdma_destroy_id);
950
951 static int cma_rep_recv(struct rdma_id_private *id_priv)
952 {
953 int ret;
954
955 ret = cma_modify_qp_rtr(id_priv, NULL);
956 if (ret)
957 goto reject;
958
959 ret = cma_modify_qp_rts(id_priv, NULL);
960 if (ret)
961 goto reject;
962
963 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
964 if (ret)
965 goto reject;
966
967 return 0;
968 reject:
969 cma_modify_qp_err(id_priv);
970 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
971 NULL, 0, NULL, 0);
972 return ret;
973 }
974
975 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
976 {
977 if (id_priv->id.ps == RDMA_PS_SDP &&
978 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
979 SDP_MAJ_VERSION)
980 return -EINVAL;
981
982 return 0;
983 }
984
985 static void cma_set_rep_event_data(struct rdma_cm_event *event,
986 struct ib_cm_rep_event_param *rep_data,
987 void *private_data)
988 {
989 event->param.conn.private_data = private_data;
990 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
991 event->param.conn.responder_resources = rep_data->responder_resources;
992 event->param.conn.initiator_depth = rep_data->initiator_depth;
993 event->param.conn.flow_control = rep_data->flow_control;
994 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
995 event->param.conn.srq = rep_data->srq;
996 event->param.conn.qp_num = rep_data->remote_qpn;
997 }
998
999 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1000 {
1001 struct rdma_id_private *id_priv = cm_id->context;
1002 struct rdma_cm_event event;
1003 int ret = 0;
1004
1005 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1006 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1007 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1008 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1009 return 0;
1010
1011 memset(&event, 0, sizeof event);
1012 switch (ib_event->event) {
1013 case IB_CM_REQ_ERROR:
1014 case IB_CM_REP_ERROR:
1015 event.event = RDMA_CM_EVENT_UNREACHABLE;
1016 event.status = -ETIMEDOUT;
1017 break;
1018 case IB_CM_REP_RECEIVED:
1019 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1020 if (event.status)
1021 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1022 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
1023 event.status = cma_rep_recv(id_priv);
1024 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1025 RDMA_CM_EVENT_ESTABLISHED;
1026 } else
1027 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1028 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1029 ib_event->private_data);
1030 break;
1031 case IB_CM_RTU_RECEIVED:
1032 case IB_CM_USER_ESTABLISHED:
1033 event.event = RDMA_CM_EVENT_ESTABLISHED;
1034 break;
1035 case IB_CM_DREQ_ERROR:
1036 event.status = -ETIMEDOUT; /* fall through */
1037 case IB_CM_DREQ_RECEIVED:
1038 case IB_CM_DREP_RECEIVED:
1039 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1040 RDMA_CM_DISCONNECT))
1041 goto out;
1042 event.event = RDMA_CM_EVENT_DISCONNECTED;
1043 break;
1044 case IB_CM_TIMEWAIT_EXIT:
1045 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1046 break;
1047 case IB_CM_MRA_RECEIVED:
1048 /* ignore event */
1049 goto out;
1050 case IB_CM_REJ_RECEIVED:
1051 cma_modify_qp_err(id_priv);
1052 event.status = ib_event->param.rej_rcvd.reason;
1053 event.event = RDMA_CM_EVENT_REJECTED;
1054 event.param.conn.private_data = ib_event->private_data;
1055 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1056 break;
1057 default:
1058 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1059 ib_event->event);
1060 goto out;
1061 }
1062
1063 ret = id_priv->id.event_handler(&id_priv->id, &event);
1064 if (ret) {
1065 /* Destroy the CM ID by returning a non-zero value. */
1066 id_priv->cm_id.ib = NULL;
1067 cma_exch(id_priv, RDMA_CM_DESTROYING);
1068 mutex_unlock(&id_priv->handler_mutex);
1069 rdma_destroy_id(&id_priv->id);
1070 return ret;
1071 }
1072 out:
1073 mutex_unlock(&id_priv->handler_mutex);
1074 return ret;
1075 }
1076
1077 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1078 struct ib_cm_event *ib_event)
1079 {
1080 struct rdma_id_private *id_priv;
1081 struct rdma_cm_id *id;
1082 struct rdma_route *rt;
1083 union cma_ip_addr *src, *dst;
1084 __be16 port;
1085 u8 ip_ver;
1086 int ret;
1087
1088 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1089 &ip_ver, &port, &src, &dst))
1090 return NULL;
1091
1092 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1093 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1094 if (IS_ERR(id))
1095 return NULL;
1096
1097 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1098 ip_ver, port, src, dst);
1099
1100 rt = &id->route;
1101 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1102 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1103 GFP_KERNEL);
1104 if (!rt->path_rec)
1105 goto err;
1106
1107 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1108 if (rt->num_paths == 2)
1109 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1110
1111 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1112 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1113 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1114 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1115 } else {
1116 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1117 &rt->addr.dev_addr);
1118 if (ret)
1119 goto err;
1120 }
1121 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1122
1123 id_priv = container_of(id, struct rdma_id_private, id);
1124 id_priv->state = RDMA_CM_CONNECT;
1125 return id_priv;
1126
1127 err:
1128 rdma_destroy_id(id);
1129 return NULL;
1130 }
1131
1132 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1133 struct ib_cm_event *ib_event)
1134 {
1135 struct rdma_id_private *id_priv;
1136 struct rdma_cm_id *id;
1137 union cma_ip_addr *src, *dst;
1138 __be16 port;
1139 u8 ip_ver;
1140 int ret;
1141
1142 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1143 listen_id->ps, IB_QPT_UD);
1144 if (IS_ERR(id))
1145 return NULL;
1146
1147
1148 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1149 &ip_ver, &port, &src, &dst))
1150 goto err;
1151
1152 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1153 ip_ver, port, src, dst);
1154
1155 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1156 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1157 &id->route.addr.dev_addr);
1158 if (ret)
1159 goto err;
1160 }
1161
1162 id_priv = container_of(id, struct rdma_id_private, id);
1163 id_priv->state = RDMA_CM_CONNECT;
1164 return id_priv;
1165 err:
1166 rdma_destroy_id(id);
1167 return NULL;
1168 }
1169
1170 static void cma_set_req_event_data(struct rdma_cm_event *event,
1171 struct ib_cm_req_event_param *req_data,
1172 void *private_data, int offset)
1173 {
1174 event->param.conn.private_data = private_data + offset;
1175 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1176 event->param.conn.responder_resources = req_data->responder_resources;
1177 event->param.conn.initiator_depth = req_data->initiator_depth;
1178 event->param.conn.flow_control = req_data->flow_control;
1179 event->param.conn.retry_count = req_data->retry_count;
1180 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1181 event->param.conn.srq = req_data->srq;
1182 event->param.conn.qp_num = req_data->remote_qpn;
1183 }
1184
1185 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1186 {
1187 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1188 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1189 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1190 (id->qp_type == IB_QPT_UD)) ||
1191 (!id->qp_type));
1192 }
1193
1194 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1195 {
1196 struct rdma_id_private *listen_id, *conn_id;
1197 struct rdma_cm_event event;
1198 int offset, ret;
1199
1200 listen_id = cm_id->context;
1201 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1202 return -EINVAL;
1203
1204 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1205 return -ECONNABORTED;
1206
1207 memset(&event, 0, sizeof event);
1208 offset = cma_user_data_offset(listen_id->id.ps);
1209 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1210 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1211 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1212 event.param.ud.private_data = ib_event->private_data + offset;
1213 event.param.ud.private_data_len =
1214 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1215 } else {
1216 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1217 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1218 ib_event->private_data, offset);
1219 }
1220 if (!conn_id) {
1221 ret = -ENOMEM;
1222 goto err1;
1223 }
1224
1225 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1226 ret = cma_acquire_dev(conn_id);
1227 if (ret)
1228 goto err2;
1229
1230 conn_id->cm_id.ib = cm_id;
1231 cm_id->context = conn_id;
1232 cm_id->cm_handler = cma_ib_handler;
1233
1234 /*
1235 * Protect against the user destroying conn_id from another thread
1236 * until we're done accessing it.
1237 */
1238 atomic_inc(&conn_id->refcount);
1239 ret = conn_id->id.event_handler(&conn_id->id, &event);
1240 if (ret)
1241 goto err3;
1242
1243 /*
1244 * Acquire mutex to prevent user executing rdma_destroy_id()
1245 * while we're accessing the cm_id.
1246 */
1247 mutex_lock(&lock);
1248 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1249 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1250 mutex_unlock(&lock);
1251 mutex_unlock(&conn_id->handler_mutex);
1252 mutex_unlock(&listen_id->handler_mutex);
1253 cma_deref_id(conn_id);
1254 return 0;
1255
1256 err3:
1257 cma_deref_id(conn_id);
1258 /* Destroy the CM ID by returning a non-zero value. */
1259 conn_id->cm_id.ib = NULL;
1260 err2:
1261 cma_exch(conn_id, RDMA_CM_DESTROYING);
1262 mutex_unlock(&conn_id->handler_mutex);
1263 err1:
1264 mutex_unlock(&listen_id->handler_mutex);
1265 if (conn_id)
1266 rdma_destroy_id(&conn_id->id);
1267 return ret;
1268 }
1269
1270 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1271 {
1272 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1273 }
1274
1275 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1276 struct ib_cm_compare_data *compare)
1277 {
1278 struct cma_hdr *cma_data, *cma_mask;
1279 struct sdp_hh *sdp_data, *sdp_mask;
1280 __be32 ip4_addr;
1281 struct in6_addr ip6_addr;
1282
1283 memset(compare, 0, sizeof *compare);
1284 cma_data = (void *) compare->data;
1285 cma_mask = (void *) compare->mask;
1286 sdp_data = (void *) compare->data;
1287 sdp_mask = (void *) compare->mask;
1288
1289 switch (addr->sa_family) {
1290 case AF_INET:
1291 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1292 if (ps == RDMA_PS_SDP) {
1293 sdp_set_ip_ver(sdp_data, 4);
1294 sdp_set_ip_ver(sdp_mask, 0xF);
1295 sdp_data->dst_addr.ip4.addr = ip4_addr;
1296 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1297 } else {
1298 cma_set_ip_ver(cma_data, 4);
1299 cma_set_ip_ver(cma_mask, 0xF);
1300 cma_data->dst_addr.ip4.addr = ip4_addr;
1301 cma_mask->dst_addr.ip4.addr = htonl(~0);
1302 }
1303 break;
1304 case AF_INET6:
1305 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1306 if (ps == RDMA_PS_SDP) {
1307 sdp_set_ip_ver(sdp_data, 6);
1308 sdp_set_ip_ver(sdp_mask, 0xF);
1309 sdp_data->dst_addr.ip6 = ip6_addr;
1310 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1311 sizeof sdp_mask->dst_addr.ip6);
1312 } else {
1313 cma_set_ip_ver(cma_data, 6);
1314 cma_set_ip_ver(cma_mask, 0xF);
1315 cma_data->dst_addr.ip6 = ip6_addr;
1316 memset(&cma_mask->dst_addr.ip6, 0xFF,
1317 sizeof cma_mask->dst_addr.ip6);
1318 }
1319 break;
1320 default:
1321 break;
1322 }
1323 }
1324
1325 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1326 {
1327 struct rdma_id_private *id_priv = iw_id->context;
1328 struct rdma_cm_event event;
1329 struct sockaddr_in *sin;
1330 int ret = 0;
1331
1332 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1333 return 0;
1334
1335 memset(&event, 0, sizeof event);
1336 switch (iw_event->event) {
1337 case IW_CM_EVENT_CLOSE:
1338 event.event = RDMA_CM_EVENT_DISCONNECTED;
1339 break;
1340 case IW_CM_EVENT_CONNECT_REPLY:
1341 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1342 *sin = iw_event->local_addr;
1343 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1344 *sin = iw_event->remote_addr;
1345 switch (iw_event->status) {
1346 case 0:
1347 event.event = RDMA_CM_EVENT_ESTABLISHED;
1348 event.param.conn.initiator_depth = iw_event->ird;
1349 event.param.conn.responder_resources = iw_event->ord;
1350 break;
1351 case -ECONNRESET:
1352 case -ECONNREFUSED:
1353 event.event = RDMA_CM_EVENT_REJECTED;
1354 break;
1355 case -ETIMEDOUT:
1356 event.event = RDMA_CM_EVENT_UNREACHABLE;
1357 break;
1358 default:
1359 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1360 break;
1361 }
1362 break;
1363 case IW_CM_EVENT_ESTABLISHED:
1364 event.event = RDMA_CM_EVENT_ESTABLISHED;
1365 event.param.conn.initiator_depth = iw_event->ird;
1366 event.param.conn.responder_resources = iw_event->ord;
1367 break;
1368 default:
1369 BUG_ON(1);
1370 }
1371
1372 event.status = iw_event->status;
1373 event.param.conn.private_data = iw_event->private_data;
1374 event.param.conn.private_data_len = iw_event->private_data_len;
1375 ret = id_priv->id.event_handler(&id_priv->id, &event);
1376 if (ret) {
1377 /* Destroy the CM ID by returning a non-zero value. */
1378 id_priv->cm_id.iw = NULL;
1379 cma_exch(id_priv, RDMA_CM_DESTROYING);
1380 mutex_unlock(&id_priv->handler_mutex);
1381 rdma_destroy_id(&id_priv->id);
1382 return ret;
1383 }
1384
1385 mutex_unlock(&id_priv->handler_mutex);
1386 return ret;
1387 }
1388
1389 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1390 struct iw_cm_event *iw_event)
1391 {
1392 struct rdma_cm_id *new_cm_id;
1393 struct rdma_id_private *listen_id, *conn_id;
1394 struct sockaddr_in *sin;
1395 struct net_device *dev = NULL;
1396 struct rdma_cm_event event;
1397 int ret;
1398 struct ib_device_attr attr;
1399
1400 listen_id = cm_id->context;
1401 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1402 return -ECONNABORTED;
1403
1404 /* Create a new RDMA id for the new IW CM ID */
1405 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1406 listen_id->id.context,
1407 RDMA_PS_TCP, IB_QPT_RC);
1408 if (IS_ERR(new_cm_id)) {
1409 ret = -ENOMEM;
1410 goto out;
1411 }
1412 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1413 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1414 conn_id->state = RDMA_CM_CONNECT;
1415
1416 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1417 if (!dev) {
1418 ret = -EADDRNOTAVAIL;
1419 mutex_unlock(&conn_id->handler_mutex);
1420 rdma_destroy_id(new_cm_id);
1421 goto out;
1422 }
1423 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1424 if (ret) {
1425 mutex_unlock(&conn_id->handler_mutex);
1426 rdma_destroy_id(new_cm_id);
1427 goto out;
1428 }
1429
1430 ret = cma_acquire_dev(conn_id);
1431 if (ret) {
1432 mutex_unlock(&conn_id->handler_mutex);
1433 rdma_destroy_id(new_cm_id);
1434 goto out;
1435 }
1436
1437 conn_id->cm_id.iw = cm_id;
1438 cm_id->context = conn_id;
1439 cm_id->cm_handler = cma_iw_handler;
1440
1441 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1442 *sin = iw_event->local_addr;
1443 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1444 *sin = iw_event->remote_addr;
1445
1446 ret = ib_query_device(conn_id->id.device, &attr);
1447 if (ret) {
1448 mutex_unlock(&conn_id->handler_mutex);
1449 rdma_destroy_id(new_cm_id);
1450 goto out;
1451 }
1452
1453 memset(&event, 0, sizeof event);
1454 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1455 event.param.conn.private_data = iw_event->private_data;
1456 event.param.conn.private_data_len = iw_event->private_data_len;
1457 event.param.conn.initiator_depth = iw_event->ird;
1458 event.param.conn.responder_resources = iw_event->ord;
1459
1460 /*
1461 * Protect against the user destroying conn_id from another thread
1462 * until we're done accessing it.
1463 */
1464 atomic_inc(&conn_id->refcount);
1465 ret = conn_id->id.event_handler(&conn_id->id, &event);
1466 if (ret) {
1467 /* User wants to destroy the CM ID */
1468 conn_id->cm_id.iw = NULL;
1469 cma_exch(conn_id, RDMA_CM_DESTROYING);
1470 mutex_unlock(&conn_id->handler_mutex);
1471 cma_deref_id(conn_id);
1472 rdma_destroy_id(&conn_id->id);
1473 goto out;
1474 }
1475
1476 mutex_unlock(&conn_id->handler_mutex);
1477 cma_deref_id(conn_id);
1478
1479 out:
1480 if (dev)
1481 dev_put(dev);
1482 mutex_unlock(&listen_id->handler_mutex);
1483 return ret;
1484 }
1485
1486 static int cma_ib_listen(struct rdma_id_private *id_priv)
1487 {
1488 struct ib_cm_compare_data compare_data;
1489 struct sockaddr *addr;
1490 struct ib_cm_id *id;
1491 __be64 svc_id;
1492 int ret;
1493
1494 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1495 if (IS_ERR(id))
1496 return PTR_ERR(id);
1497
1498 id_priv->cm_id.ib = id;
1499
1500 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1501 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1502 if (cma_any_addr(addr))
1503 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1504 else {
1505 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1506 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1507 }
1508
1509 if (ret) {
1510 ib_destroy_cm_id(id_priv->cm_id.ib);
1511 id_priv->cm_id.ib = NULL;
1512 }
1513
1514 return ret;
1515 }
1516
1517 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1518 {
1519 int ret;
1520 struct sockaddr_in *sin;
1521 struct iw_cm_id *id;
1522
1523 id = iw_create_cm_id(id_priv->id.device,
1524 iw_conn_req_handler,
1525 id_priv);
1526 if (IS_ERR(id))
1527 return PTR_ERR(id);
1528
1529 id_priv->cm_id.iw = id;
1530
1531 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1532 id_priv->cm_id.iw->local_addr = *sin;
1533
1534 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1535
1536 if (ret) {
1537 iw_destroy_cm_id(id_priv->cm_id.iw);
1538 id_priv->cm_id.iw = NULL;
1539 }
1540
1541 return ret;
1542 }
1543
1544 static int cma_listen_handler(struct rdma_cm_id *id,
1545 struct rdma_cm_event *event)
1546 {
1547 struct rdma_id_private *id_priv = id->context;
1548
1549 id->context = id_priv->id.context;
1550 id->event_handler = id_priv->id.event_handler;
1551 return id_priv->id.event_handler(id, event);
1552 }
1553
1554 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1555 struct cma_device *cma_dev)
1556 {
1557 struct rdma_id_private *dev_id_priv;
1558 struct rdma_cm_id *id;
1559 int ret;
1560
1561 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1562 id_priv->id.qp_type);
1563 if (IS_ERR(id))
1564 return;
1565
1566 dev_id_priv = container_of(id, struct rdma_id_private, id);
1567
1568 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1569 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1570 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1571
1572 cma_attach_to_dev(dev_id_priv, cma_dev);
1573 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1574 atomic_inc(&id_priv->refcount);
1575 dev_id_priv->internal_id = 1;
1576
1577 ret = rdma_listen(id, id_priv->backlog);
1578 if (ret)
1579 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1580 "listening on device %s\n", ret, cma_dev->device->name);
1581 }
1582
1583 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1584 {
1585 struct cma_device *cma_dev;
1586
1587 mutex_lock(&lock);
1588 list_add_tail(&id_priv->list, &listen_any_list);
1589 list_for_each_entry(cma_dev, &dev_list, list)
1590 cma_listen_on_dev(id_priv, cma_dev);
1591 mutex_unlock(&lock);
1592 }
1593
1594 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1595 {
1596 struct rdma_id_private *id_priv;
1597
1598 id_priv = container_of(id, struct rdma_id_private, id);
1599 id_priv->tos = (u8) tos;
1600 }
1601 EXPORT_SYMBOL(rdma_set_service_type);
1602
1603 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1604 void *context)
1605 {
1606 struct cma_work *work = context;
1607 struct rdma_route *route;
1608
1609 route = &work->id->id.route;
1610
1611 if (!status) {
1612 route->num_paths = 1;
1613 *route->path_rec = *path_rec;
1614 } else {
1615 work->old_state = RDMA_CM_ROUTE_QUERY;
1616 work->new_state = RDMA_CM_ADDR_RESOLVED;
1617 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1618 work->event.status = status;
1619 }
1620
1621 queue_work(cma_wq, &work->work);
1622 }
1623
1624 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1625 struct cma_work *work)
1626 {
1627 struct rdma_addr *addr = &id_priv->id.route.addr;
1628 struct ib_sa_path_rec path_rec;
1629 ib_sa_comp_mask comp_mask;
1630 struct sockaddr_in6 *sin6;
1631
1632 memset(&path_rec, 0, sizeof path_rec);
1633 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1634 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1635 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1636 path_rec.numb_path = 1;
1637 path_rec.reversible = 1;
1638 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1639 (struct sockaddr *) &addr->dst_addr);
1640
1641 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1642 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1643 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1644
1645 if (addr->src_addr.ss_family == AF_INET) {
1646 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1647 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1648 } else {
1649 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1650 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1651 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1652 }
1653
1654 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1655 id_priv->id.port_num, &path_rec,
1656 comp_mask, timeout_ms,
1657 GFP_KERNEL, cma_query_handler,
1658 work, &id_priv->query);
1659
1660 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1661 }
1662
1663 static void cma_work_handler(struct work_struct *_work)
1664 {
1665 struct cma_work *work = container_of(_work, struct cma_work, work);
1666 struct rdma_id_private *id_priv = work->id;
1667 int destroy = 0;
1668
1669 mutex_lock(&id_priv->handler_mutex);
1670 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1671 goto out;
1672
1673 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1674 cma_exch(id_priv, RDMA_CM_DESTROYING);
1675 destroy = 1;
1676 }
1677 out:
1678 mutex_unlock(&id_priv->handler_mutex);
1679 cma_deref_id(id_priv);
1680 if (destroy)
1681 rdma_destroy_id(&id_priv->id);
1682 kfree(work);
1683 }
1684
1685 static void cma_ndev_work_handler(struct work_struct *_work)
1686 {
1687 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1688 struct rdma_id_private *id_priv = work->id;
1689 int destroy = 0;
1690
1691 mutex_lock(&id_priv->handler_mutex);
1692 if (id_priv->state == RDMA_CM_DESTROYING ||
1693 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1694 goto out;
1695
1696 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1697 cma_exch(id_priv, RDMA_CM_DESTROYING);
1698 destroy = 1;
1699 }
1700
1701 out:
1702 mutex_unlock(&id_priv->handler_mutex);
1703 cma_deref_id(id_priv);
1704 if (destroy)
1705 rdma_destroy_id(&id_priv->id);
1706 kfree(work);
1707 }
1708
1709 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1710 {
1711 struct rdma_route *route = &id_priv->id.route;
1712 struct cma_work *work;
1713 int ret;
1714
1715 work = kzalloc(sizeof *work, GFP_KERNEL);
1716 if (!work)
1717 return -ENOMEM;
1718
1719 work->id = id_priv;
1720 INIT_WORK(&work->work, cma_work_handler);
1721 work->old_state = RDMA_CM_ROUTE_QUERY;
1722 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1723 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1724
1725 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1726 if (!route->path_rec) {
1727 ret = -ENOMEM;
1728 goto err1;
1729 }
1730
1731 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1732 if (ret)
1733 goto err2;
1734
1735 return 0;
1736 err2:
1737 kfree(route->path_rec);
1738 route->path_rec = NULL;
1739 err1:
1740 kfree(work);
1741 return ret;
1742 }
1743
1744 int rdma_set_ib_paths(struct rdma_cm_id *id,
1745 struct ib_sa_path_rec *path_rec, int num_paths)
1746 {
1747 struct rdma_id_private *id_priv;
1748 int ret;
1749
1750 id_priv = container_of(id, struct rdma_id_private, id);
1751 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1752 RDMA_CM_ROUTE_RESOLVED))
1753 return -EINVAL;
1754
1755 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1756 GFP_KERNEL);
1757 if (!id->route.path_rec) {
1758 ret = -ENOMEM;
1759 goto err;
1760 }
1761
1762 id->route.num_paths = num_paths;
1763 return 0;
1764 err:
1765 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1766 return ret;
1767 }
1768 EXPORT_SYMBOL(rdma_set_ib_paths);
1769
1770 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1771 {
1772 struct cma_work *work;
1773
1774 work = kzalloc(sizeof *work, GFP_KERNEL);
1775 if (!work)
1776 return -ENOMEM;
1777
1778 work->id = id_priv;
1779 INIT_WORK(&work->work, cma_work_handler);
1780 work->old_state = RDMA_CM_ROUTE_QUERY;
1781 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1782 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1783 queue_work(cma_wq, &work->work);
1784 return 0;
1785 }
1786
1787 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1788 {
1789 struct rdma_route *route = &id_priv->id.route;
1790 struct rdma_addr *addr = &route->addr;
1791 struct cma_work *work;
1792 int ret;
1793 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1794 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1795 struct net_device *ndev = NULL;
1796 u16 vid;
1797
1798 if (src_addr->sin_family != dst_addr->sin_family)
1799 return -EINVAL;
1800
1801 work = kzalloc(sizeof *work, GFP_KERNEL);
1802 if (!work)
1803 return -ENOMEM;
1804
1805 work->id = id_priv;
1806 INIT_WORK(&work->work, cma_work_handler);
1807
1808 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1809 if (!route->path_rec) {
1810 ret = -ENOMEM;
1811 goto err1;
1812 }
1813
1814 route->num_paths = 1;
1815
1816 if (addr->dev_addr.bound_dev_if)
1817 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1818 if (!ndev) {
1819 ret = -ENODEV;
1820 goto err2;
1821 }
1822
1823 vid = rdma_vlan_dev_vlan_id(ndev);
1824
1825 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1826 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1827
1828 route->path_rec->hop_limit = 1;
1829 route->path_rec->reversible = 1;
1830 route->path_rec->pkey = cpu_to_be16(0xffff);
1831 route->path_rec->mtu_selector = IB_SA_EQ;
1832 route->path_rec->sl = netdev_get_prio_tc_map(
1833 ndev->priv_flags & IFF_802_1Q_VLAN ?
1834 vlan_dev_real_dev(ndev) : ndev,
1835 rt_tos2priority(id_priv->tos));
1836
1837 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1838 route->path_rec->rate_selector = IB_SA_EQ;
1839 route->path_rec->rate = iboe_get_rate(ndev);
1840 dev_put(ndev);
1841 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1842 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1843 if (!route->path_rec->mtu) {
1844 ret = -EINVAL;
1845 goto err2;
1846 }
1847
1848 work->old_state = RDMA_CM_ROUTE_QUERY;
1849 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1850 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1851 work->event.status = 0;
1852
1853 queue_work(cma_wq, &work->work);
1854
1855 return 0;
1856
1857 err2:
1858 kfree(route->path_rec);
1859 route->path_rec = NULL;
1860 err1:
1861 kfree(work);
1862 return ret;
1863 }
1864
1865 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1866 {
1867 struct rdma_id_private *id_priv;
1868 int ret;
1869
1870 id_priv = container_of(id, struct rdma_id_private, id);
1871 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1872 return -EINVAL;
1873
1874 atomic_inc(&id_priv->refcount);
1875 switch (rdma_node_get_transport(id->device->node_type)) {
1876 case RDMA_TRANSPORT_IB:
1877 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1878 case IB_LINK_LAYER_INFINIBAND:
1879 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1880 break;
1881 case IB_LINK_LAYER_ETHERNET:
1882 ret = cma_resolve_iboe_route(id_priv);
1883 break;
1884 default:
1885 ret = -ENOSYS;
1886 }
1887 break;
1888 case RDMA_TRANSPORT_IWARP:
1889 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1890 break;
1891 default:
1892 ret = -ENOSYS;
1893 break;
1894 }
1895 if (ret)
1896 goto err;
1897
1898 return 0;
1899 err:
1900 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1901 cma_deref_id(id_priv);
1902 return ret;
1903 }
1904 EXPORT_SYMBOL(rdma_resolve_route);
1905
1906 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1907 {
1908 struct cma_device *cma_dev;
1909 struct ib_port_attr port_attr;
1910 union ib_gid gid;
1911 u16 pkey;
1912 int ret;
1913 u8 p;
1914
1915 mutex_lock(&lock);
1916 if (list_empty(&dev_list)) {
1917 ret = -ENODEV;
1918 goto out;
1919 }
1920 list_for_each_entry(cma_dev, &dev_list, list)
1921 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1922 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1923 port_attr.state == IB_PORT_ACTIVE)
1924 goto port_found;
1925
1926 p = 1;
1927 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1928
1929 port_found:
1930 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1931 if (ret)
1932 goto out;
1933
1934 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1935 if (ret)
1936 goto out;
1937
1938 id_priv->id.route.addr.dev_addr.dev_type =
1939 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1940 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1941
1942 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1943 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1944 id_priv->id.port_num = p;
1945 cma_attach_to_dev(id_priv, cma_dev);
1946 out:
1947 mutex_unlock(&lock);
1948 return ret;
1949 }
1950
1951 static void addr_handler(int status, struct sockaddr *src_addr,
1952 struct rdma_dev_addr *dev_addr, void *context)
1953 {
1954 struct rdma_id_private *id_priv = context;
1955 struct rdma_cm_event event;
1956
1957 memset(&event, 0, sizeof event);
1958 mutex_lock(&id_priv->handler_mutex);
1959 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
1960 RDMA_CM_ADDR_RESOLVED))
1961 goto out;
1962
1963 if (!status && !id_priv->cma_dev)
1964 status = cma_acquire_dev(id_priv);
1965
1966 if (status) {
1967 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1968 RDMA_CM_ADDR_BOUND))
1969 goto out;
1970 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1971 event.status = status;
1972 } else {
1973 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1974 ip_addr_size(src_addr));
1975 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1976 }
1977
1978 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1979 cma_exch(id_priv, RDMA_CM_DESTROYING);
1980 mutex_unlock(&id_priv->handler_mutex);
1981 cma_deref_id(id_priv);
1982 rdma_destroy_id(&id_priv->id);
1983 return;
1984 }
1985 out:
1986 mutex_unlock(&id_priv->handler_mutex);
1987 cma_deref_id(id_priv);
1988 }
1989
1990 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1991 {
1992 struct cma_work *work;
1993 struct sockaddr *src, *dst;
1994 union ib_gid gid;
1995 int ret;
1996
1997 work = kzalloc(sizeof *work, GFP_KERNEL);
1998 if (!work)
1999 return -ENOMEM;
2000
2001 if (!id_priv->cma_dev) {
2002 ret = cma_bind_loopback(id_priv);
2003 if (ret)
2004 goto err;
2005 }
2006
2007 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2008 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2009
2010 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2011 if (cma_zero_addr(src)) {
2012 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2013 if ((src->sa_family = dst->sa_family) == AF_INET) {
2014 ((struct sockaddr_in *)src)->sin_addr =
2015 ((struct sockaddr_in *)dst)->sin_addr;
2016 } else {
2017 ((struct sockaddr_in6 *)src)->sin6_addr =
2018 ((struct sockaddr_in6 *)dst)->sin6_addr;
2019 }
2020 }
2021
2022 work->id = id_priv;
2023 INIT_WORK(&work->work, cma_work_handler);
2024 work->old_state = RDMA_CM_ADDR_QUERY;
2025 work->new_state = RDMA_CM_ADDR_RESOLVED;
2026 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2027 queue_work(cma_wq, &work->work);
2028 return 0;
2029 err:
2030 kfree(work);
2031 return ret;
2032 }
2033
2034 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2035 struct sockaddr *dst_addr)
2036 {
2037 if (!src_addr || !src_addr->sa_family) {
2038 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2039 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2040 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2041 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2042 }
2043 }
2044 return rdma_bind_addr(id, src_addr);
2045 }
2046
2047 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2048 struct sockaddr *dst_addr, int timeout_ms)
2049 {
2050 struct rdma_id_private *id_priv;
2051 int ret;
2052
2053 id_priv = container_of(id, struct rdma_id_private, id);
2054 if (id_priv->state == RDMA_CM_IDLE) {
2055 ret = cma_bind_addr(id, src_addr, dst_addr);
2056 if (ret)
2057 return ret;
2058 }
2059
2060 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2061 return -EINVAL;
2062
2063 atomic_inc(&id_priv->refcount);
2064 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2065 if (cma_any_addr(dst_addr))
2066 ret = cma_resolve_loopback(id_priv);
2067 else
2068 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2069 dst_addr, &id->route.addr.dev_addr,
2070 timeout_ms, addr_handler, id_priv);
2071 if (ret)
2072 goto err;
2073
2074 return 0;
2075 err:
2076 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2077 cma_deref_id(id_priv);
2078 return ret;
2079 }
2080 EXPORT_SYMBOL(rdma_resolve_addr);
2081
2082 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2083 {
2084 struct rdma_id_private *id_priv;
2085 unsigned long flags;
2086 int ret;
2087
2088 id_priv = container_of(id, struct rdma_id_private, id);
2089 spin_lock_irqsave(&id_priv->lock, flags);
2090 if (id_priv->state == RDMA_CM_IDLE) {
2091 id_priv->reuseaddr = reuse;
2092 ret = 0;
2093 } else {
2094 ret = -EINVAL;
2095 }
2096 spin_unlock_irqrestore(&id_priv->lock, flags);
2097 return ret;
2098 }
2099 EXPORT_SYMBOL(rdma_set_reuseaddr);
2100
2101 static void cma_bind_port(struct rdma_bind_list *bind_list,
2102 struct rdma_id_private *id_priv)
2103 {
2104 struct sockaddr_in *sin;
2105
2106 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2107 sin->sin_port = htons(bind_list->port);
2108 id_priv->bind_list = bind_list;
2109 hlist_add_head(&id_priv->node, &bind_list->owners);
2110 }
2111
2112 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2113 unsigned short snum)
2114 {
2115 struct rdma_bind_list *bind_list;
2116 int port, ret;
2117
2118 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2119 if (!bind_list)
2120 return -ENOMEM;
2121
2122 do {
2123 ret = idr_get_new_above(ps, bind_list, snum, &port);
2124 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2125
2126 if (ret)
2127 goto err1;
2128
2129 if (port != snum) {
2130 ret = -EADDRNOTAVAIL;
2131 goto err2;
2132 }
2133
2134 bind_list->ps = ps;
2135 bind_list->port = (unsigned short) port;
2136 cma_bind_port(bind_list, id_priv);
2137 return 0;
2138 err2:
2139 idr_remove(ps, port);
2140 err1:
2141 kfree(bind_list);
2142 return ret;
2143 }
2144
2145 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2146 {
2147 static unsigned int last_used_port;
2148 int low, high, remaining;
2149 unsigned int rover;
2150
2151 inet_get_local_port_range(&low, &high);
2152 remaining = (high - low) + 1;
2153 rover = net_random() % remaining + low;
2154 retry:
2155 if (last_used_port != rover &&
2156 !idr_find(ps, (unsigned short) rover)) {
2157 int ret = cma_alloc_port(ps, id_priv, rover);
2158 /*
2159 * Remember previously used port number in order to avoid
2160 * re-using same port immediately after it is closed.
2161 */
2162 if (!ret)
2163 last_used_port = rover;
2164 if (ret != -EADDRNOTAVAIL)
2165 return ret;
2166 }
2167 if (--remaining) {
2168 rover++;
2169 if ((rover < low) || (rover > high))
2170 rover = low;
2171 goto retry;
2172 }
2173 return -EADDRNOTAVAIL;
2174 }
2175
2176 /*
2177 * Check that the requested port is available. This is called when trying to
2178 * bind to a specific port, or when trying to listen on a bound port. In
2179 * the latter case, the provided id_priv may already be on the bind_list, but
2180 * we still need to check that it's okay to start listening.
2181 */
2182 static int cma_check_port(struct rdma_bind_list *bind_list,
2183 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2184 {
2185 struct rdma_id_private *cur_id;
2186 struct sockaddr *addr, *cur_addr;
2187 struct hlist_node *node;
2188
2189 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2190 if (cma_any_addr(addr) && !reuseaddr)
2191 return -EADDRNOTAVAIL;
2192
2193 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2194 if (id_priv == cur_id)
2195 continue;
2196
2197 if ((cur_id->state == RDMA_CM_LISTEN) ||
2198 !reuseaddr || !cur_id->reuseaddr) {
2199 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2200 if (cma_any_addr(cur_addr))
2201 return -EADDRNOTAVAIL;
2202
2203 if (!cma_addr_cmp(addr, cur_addr))
2204 return -EADDRINUSE;
2205 }
2206 }
2207 return 0;
2208 }
2209
2210 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2211 {
2212 struct rdma_bind_list *bind_list;
2213 unsigned short snum;
2214 int ret;
2215
2216 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2217 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2218 return -EACCES;
2219
2220 bind_list = idr_find(ps, snum);
2221 if (!bind_list) {
2222 ret = cma_alloc_port(ps, id_priv, snum);
2223 } else {
2224 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2225 if (!ret)
2226 cma_bind_port(bind_list, id_priv);
2227 }
2228 return ret;
2229 }
2230
2231 static int cma_bind_listen(struct rdma_id_private *id_priv)
2232 {
2233 struct rdma_bind_list *bind_list = id_priv->bind_list;
2234 int ret = 0;
2235
2236 mutex_lock(&lock);
2237 if (bind_list->owners.first->next)
2238 ret = cma_check_port(bind_list, id_priv, 0);
2239 mutex_unlock(&lock);
2240 return ret;
2241 }
2242
2243 static int cma_get_port(struct rdma_id_private *id_priv)
2244 {
2245 struct idr *ps;
2246 int ret;
2247
2248 switch (id_priv->id.ps) {
2249 case RDMA_PS_SDP:
2250 ps = &sdp_ps;
2251 break;
2252 case RDMA_PS_TCP:
2253 ps = &tcp_ps;
2254 break;
2255 case RDMA_PS_UDP:
2256 ps = &udp_ps;
2257 break;
2258 case RDMA_PS_IPOIB:
2259 ps = &ipoib_ps;
2260 break;
2261 case RDMA_PS_IB:
2262 ps = &ib_ps;
2263 break;
2264 default:
2265 return -EPROTONOSUPPORT;
2266 }
2267
2268 mutex_lock(&lock);
2269 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2270 ret = cma_alloc_any_port(ps, id_priv);
2271 else
2272 ret = cma_use_port(ps, id_priv);
2273 mutex_unlock(&lock);
2274
2275 return ret;
2276 }
2277
2278 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2279 struct sockaddr *addr)
2280 {
2281 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2282 struct sockaddr_in6 *sin6;
2283
2284 if (addr->sa_family != AF_INET6)
2285 return 0;
2286
2287 sin6 = (struct sockaddr_in6 *) addr;
2288 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2289 !sin6->sin6_scope_id)
2290 return -EINVAL;
2291
2292 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2293 #endif
2294 return 0;
2295 }
2296
2297 int rdma_listen(struct rdma_cm_id *id, int backlog)
2298 {
2299 struct rdma_id_private *id_priv;
2300 int ret;
2301
2302 id_priv = container_of(id, struct rdma_id_private, id);
2303 if (id_priv->state == RDMA_CM_IDLE) {
2304 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2305 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2306 if (ret)
2307 return ret;
2308 }
2309
2310 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2311 return -EINVAL;
2312
2313 if (id_priv->reuseaddr) {
2314 ret = cma_bind_listen(id_priv);
2315 if (ret)
2316 goto err;
2317 }
2318
2319 id_priv->backlog = backlog;
2320 if (id->device) {
2321 switch (rdma_node_get_transport(id->device->node_type)) {
2322 case RDMA_TRANSPORT_IB:
2323 ret = cma_ib_listen(id_priv);
2324 if (ret)
2325 goto err;
2326 break;
2327 case RDMA_TRANSPORT_IWARP:
2328 ret = cma_iw_listen(id_priv, backlog);
2329 if (ret)
2330 goto err;
2331 break;
2332 default:
2333 ret = -ENOSYS;
2334 goto err;
2335 }
2336 } else
2337 cma_listen_on_all(id_priv);
2338
2339 return 0;
2340 err:
2341 id_priv->backlog = 0;
2342 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2343 return ret;
2344 }
2345 EXPORT_SYMBOL(rdma_listen);
2346
2347 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2348 {
2349 struct rdma_id_private *id_priv;
2350 int ret;
2351
2352 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2353 return -EAFNOSUPPORT;
2354
2355 id_priv = container_of(id, struct rdma_id_private, id);
2356 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2357 return -EINVAL;
2358
2359 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2360 if (ret)
2361 goto err1;
2362
2363 if (!cma_any_addr(addr)) {
2364 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2365 if (ret)
2366 goto err1;
2367
2368 ret = cma_acquire_dev(id_priv);
2369 if (ret)
2370 goto err1;
2371 }
2372
2373 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2374 ret = cma_get_port(id_priv);
2375 if (ret)
2376 goto err2;
2377
2378 return 0;
2379 err2:
2380 if (id_priv->cma_dev)
2381 cma_release_dev(id_priv);
2382 err1:
2383 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2384 return ret;
2385 }
2386 EXPORT_SYMBOL(rdma_bind_addr);
2387
2388 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2389 struct rdma_route *route)
2390 {
2391 struct cma_hdr *cma_hdr;
2392 struct sdp_hh *sdp_hdr;
2393
2394 if (route->addr.src_addr.ss_family == AF_INET) {
2395 struct sockaddr_in *src4, *dst4;
2396
2397 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2398 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2399
2400 switch (ps) {
2401 case RDMA_PS_SDP:
2402 sdp_hdr = hdr;
2403 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2404 return -EINVAL;
2405 sdp_set_ip_ver(sdp_hdr, 4);
2406 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2407 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2408 sdp_hdr->port = src4->sin_port;
2409 break;
2410 default:
2411 cma_hdr = hdr;
2412 cma_hdr->cma_version = CMA_VERSION;
2413 cma_set_ip_ver(cma_hdr, 4);
2414 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2415 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2416 cma_hdr->port = src4->sin_port;
2417 break;
2418 }
2419 } else {
2420 struct sockaddr_in6 *src6, *dst6;
2421
2422 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2423 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2424
2425 switch (ps) {
2426 case RDMA_PS_SDP:
2427 sdp_hdr = hdr;
2428 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2429 return -EINVAL;
2430 sdp_set_ip_ver(sdp_hdr, 6);
2431 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2432 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2433 sdp_hdr->port = src6->sin6_port;
2434 break;
2435 default:
2436 cma_hdr = hdr;
2437 cma_hdr->cma_version = CMA_VERSION;
2438 cma_set_ip_ver(cma_hdr, 6);
2439 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2440 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2441 cma_hdr->port = src6->sin6_port;
2442 break;
2443 }
2444 }
2445 return 0;
2446 }
2447
2448 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2449 struct ib_cm_event *ib_event)
2450 {
2451 struct rdma_id_private *id_priv = cm_id->context;
2452 struct rdma_cm_event event;
2453 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2454 int ret = 0;
2455
2456 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2457 return 0;
2458
2459 memset(&event, 0, sizeof event);
2460 switch (ib_event->event) {
2461 case IB_CM_SIDR_REQ_ERROR:
2462 event.event = RDMA_CM_EVENT_UNREACHABLE;
2463 event.status = -ETIMEDOUT;
2464 break;
2465 case IB_CM_SIDR_REP_RECEIVED:
2466 event.param.ud.private_data = ib_event->private_data;
2467 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2468 if (rep->status != IB_SIDR_SUCCESS) {
2469 event.event = RDMA_CM_EVENT_UNREACHABLE;
2470 event.status = ib_event->param.sidr_rep_rcvd.status;
2471 break;
2472 }
2473 ret = cma_set_qkey(id_priv);
2474 if (ret) {
2475 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2476 event.status = -EINVAL;
2477 break;
2478 }
2479 if (id_priv->qkey != rep->qkey) {
2480 event.event = RDMA_CM_EVENT_UNREACHABLE;
2481 event.status = -EINVAL;
2482 break;
2483 }
2484 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2485 id_priv->id.route.path_rec,
2486 &event.param.ud.ah_attr);
2487 event.param.ud.qp_num = rep->qpn;
2488 event.param.ud.qkey = rep->qkey;
2489 event.event = RDMA_CM_EVENT_ESTABLISHED;
2490 event.status = 0;
2491 break;
2492 default:
2493 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2494 ib_event->event);
2495 goto out;
2496 }
2497
2498 ret = id_priv->id.event_handler(&id_priv->id, &event);
2499 if (ret) {
2500 /* Destroy the CM ID by returning a non-zero value. */
2501 id_priv->cm_id.ib = NULL;
2502 cma_exch(id_priv, RDMA_CM_DESTROYING);
2503 mutex_unlock(&id_priv->handler_mutex);
2504 rdma_destroy_id(&id_priv->id);
2505 return ret;
2506 }
2507 out:
2508 mutex_unlock(&id_priv->handler_mutex);
2509 return ret;
2510 }
2511
2512 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2513 struct rdma_conn_param *conn_param)
2514 {
2515 struct ib_cm_sidr_req_param req;
2516 struct rdma_route *route;
2517 struct ib_cm_id *id;
2518 int ret;
2519
2520 req.private_data_len = sizeof(struct cma_hdr) +
2521 conn_param->private_data_len;
2522 if (req.private_data_len < conn_param->private_data_len)
2523 return -EINVAL;
2524
2525 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2526 if (!req.private_data)
2527 return -ENOMEM;
2528
2529 if (conn_param->private_data && conn_param->private_data_len)
2530 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2531 conn_param->private_data, conn_param->private_data_len);
2532
2533 route = &id_priv->id.route;
2534 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2535 if (ret)
2536 goto out;
2537
2538 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2539 id_priv);
2540 if (IS_ERR(id)) {
2541 ret = PTR_ERR(id);
2542 goto out;
2543 }
2544 id_priv->cm_id.ib = id;
2545
2546 req.path = route->path_rec;
2547 req.service_id = cma_get_service_id(id_priv->id.ps,
2548 (struct sockaddr *) &route->addr.dst_addr);
2549 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2550 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2551
2552 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2553 if (ret) {
2554 ib_destroy_cm_id(id_priv->cm_id.ib);
2555 id_priv->cm_id.ib = NULL;
2556 }
2557 out:
2558 kfree(req.private_data);
2559 return ret;
2560 }
2561
2562 static int cma_connect_ib(struct rdma_id_private *id_priv,
2563 struct rdma_conn_param *conn_param)
2564 {
2565 struct ib_cm_req_param req;
2566 struct rdma_route *route;
2567 void *private_data;
2568 struct ib_cm_id *id;
2569 int offset, ret;
2570
2571 memset(&req, 0, sizeof req);
2572 offset = cma_user_data_offset(id_priv->id.ps);
2573 req.private_data_len = offset + conn_param->private_data_len;
2574 if (req.private_data_len < conn_param->private_data_len)
2575 return -EINVAL;
2576
2577 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2578 if (!private_data)
2579 return -ENOMEM;
2580
2581 if (conn_param->private_data && conn_param->private_data_len)
2582 memcpy(private_data + offset, conn_param->private_data,
2583 conn_param->private_data_len);
2584
2585 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2586 if (IS_ERR(id)) {
2587 ret = PTR_ERR(id);
2588 goto out;
2589 }
2590 id_priv->cm_id.ib = id;
2591
2592 route = &id_priv->id.route;
2593 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2594 if (ret)
2595 goto out;
2596 req.private_data = private_data;
2597
2598 req.primary_path = &route->path_rec[0];
2599 if (route->num_paths == 2)
2600 req.alternate_path = &route->path_rec[1];
2601
2602 req.service_id = cma_get_service_id(id_priv->id.ps,
2603 (struct sockaddr *) &route->addr.dst_addr);
2604 req.qp_num = id_priv->qp_num;
2605 req.qp_type = id_priv->id.qp_type;
2606 req.starting_psn = id_priv->seq_num;
2607 req.responder_resources = conn_param->responder_resources;
2608 req.initiator_depth = conn_param->initiator_depth;
2609 req.flow_control = conn_param->flow_control;
2610 req.retry_count = conn_param->retry_count;
2611 req.rnr_retry_count = conn_param->rnr_retry_count;
2612 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2613 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2614 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2615 req.srq = id_priv->srq ? 1 : 0;
2616
2617 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2618 out:
2619 if (ret && !IS_ERR(id)) {
2620 ib_destroy_cm_id(id);
2621 id_priv->cm_id.ib = NULL;
2622 }
2623
2624 kfree(private_data);
2625 return ret;
2626 }
2627
2628 static int cma_connect_iw(struct rdma_id_private *id_priv,
2629 struct rdma_conn_param *conn_param)
2630 {
2631 struct iw_cm_id *cm_id;
2632 struct sockaddr_in* sin;
2633 int ret;
2634 struct iw_cm_conn_param iw_param;
2635
2636 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2637 if (IS_ERR(cm_id))
2638 return PTR_ERR(cm_id);
2639
2640 id_priv->cm_id.iw = cm_id;
2641
2642 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2643 cm_id->local_addr = *sin;
2644
2645 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2646 cm_id->remote_addr = *sin;
2647
2648 ret = cma_modify_qp_rtr(id_priv, conn_param);
2649 if (ret)
2650 goto out;
2651
2652 if (conn_param) {
2653 iw_param.ord = conn_param->initiator_depth;
2654 iw_param.ird = conn_param->responder_resources;
2655 iw_param.private_data = conn_param->private_data;
2656 iw_param.private_data_len = conn_param->private_data_len;
2657 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2658 } else {
2659 memset(&iw_param, 0, sizeof iw_param);
2660 iw_param.qpn = id_priv->qp_num;
2661 }
2662 ret = iw_cm_connect(cm_id, &iw_param);
2663 out:
2664 if (ret) {
2665 iw_destroy_cm_id(cm_id);
2666 id_priv->cm_id.iw = NULL;
2667 }
2668 return ret;
2669 }
2670
2671 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2672 {
2673 struct rdma_id_private *id_priv;
2674 int ret;
2675
2676 id_priv = container_of(id, struct rdma_id_private, id);
2677 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2678 return -EINVAL;
2679
2680 if (!id->qp) {
2681 id_priv->qp_num = conn_param->qp_num;
2682 id_priv->srq = conn_param->srq;
2683 }
2684
2685 switch (rdma_node_get_transport(id->device->node_type)) {
2686 case RDMA_TRANSPORT_IB:
2687 if (id->qp_type == IB_QPT_UD)
2688 ret = cma_resolve_ib_udp(id_priv, conn_param);
2689 else
2690 ret = cma_connect_ib(id_priv, conn_param);
2691 break;
2692 case RDMA_TRANSPORT_IWARP:
2693 ret = cma_connect_iw(id_priv, conn_param);
2694 break;
2695 default:
2696 ret = -ENOSYS;
2697 break;
2698 }
2699 if (ret)
2700 goto err;
2701
2702 return 0;
2703 err:
2704 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2705 return ret;
2706 }
2707 EXPORT_SYMBOL(rdma_connect);
2708
2709 static int cma_accept_ib(struct rdma_id_private *id_priv,
2710 struct rdma_conn_param *conn_param)
2711 {
2712 struct ib_cm_rep_param rep;
2713 int ret;
2714
2715 ret = cma_modify_qp_rtr(id_priv, conn_param);
2716 if (ret)
2717 goto out;
2718
2719 ret = cma_modify_qp_rts(id_priv, conn_param);
2720 if (ret)
2721 goto out;
2722
2723 memset(&rep, 0, sizeof rep);
2724 rep.qp_num = id_priv->qp_num;
2725 rep.starting_psn = id_priv->seq_num;
2726 rep.private_data = conn_param->private_data;
2727 rep.private_data_len = conn_param->private_data_len;
2728 rep.responder_resources = conn_param->responder_resources;
2729 rep.initiator_depth = conn_param->initiator_depth;
2730 rep.failover_accepted = 0;
2731 rep.flow_control = conn_param->flow_control;
2732 rep.rnr_retry_count = conn_param->rnr_retry_count;
2733 rep.srq = id_priv->srq ? 1 : 0;
2734
2735 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2736 out:
2737 return ret;
2738 }
2739
2740 static int cma_accept_iw(struct rdma_id_private *id_priv,
2741 struct rdma_conn_param *conn_param)
2742 {
2743 struct iw_cm_conn_param iw_param;
2744 int ret;
2745
2746 ret = cma_modify_qp_rtr(id_priv, conn_param);
2747 if (ret)
2748 return ret;
2749
2750 iw_param.ord = conn_param->initiator_depth;
2751 iw_param.ird = conn_param->responder_resources;
2752 iw_param.private_data = conn_param->private_data;
2753 iw_param.private_data_len = conn_param->private_data_len;
2754 if (id_priv->id.qp) {
2755 iw_param.qpn = id_priv->qp_num;
2756 } else
2757 iw_param.qpn = conn_param->qp_num;
2758
2759 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2760 }
2761
2762 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2763 enum ib_cm_sidr_status status,
2764 const void *private_data, int private_data_len)
2765 {
2766 struct ib_cm_sidr_rep_param rep;
2767 int ret;
2768
2769 memset(&rep, 0, sizeof rep);
2770 rep.status = status;
2771 if (status == IB_SIDR_SUCCESS) {
2772 ret = cma_set_qkey(id_priv);
2773 if (ret)
2774 return ret;
2775 rep.qp_num = id_priv->qp_num;
2776 rep.qkey = id_priv->qkey;
2777 }
2778 rep.private_data = private_data;
2779 rep.private_data_len = private_data_len;
2780
2781 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2782 }
2783
2784 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2785 {
2786 struct rdma_id_private *id_priv;
2787 int ret;
2788
2789 id_priv = container_of(id, struct rdma_id_private, id);
2790
2791 id_priv->owner = task_pid_nr(current);
2792
2793 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2794 return -EINVAL;
2795
2796 if (!id->qp && conn_param) {
2797 id_priv->qp_num = conn_param->qp_num;
2798 id_priv->srq = conn_param->srq;
2799 }
2800
2801 switch (rdma_node_get_transport(id->device->node_type)) {
2802 case RDMA_TRANSPORT_IB:
2803 if (id->qp_type == IB_QPT_UD) {
2804 if (conn_param)
2805 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2806 conn_param->private_data,
2807 conn_param->private_data_len);
2808 else
2809 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2810 NULL, 0);
2811 } else {
2812 if (conn_param)
2813 ret = cma_accept_ib(id_priv, conn_param);
2814 else
2815 ret = cma_rep_recv(id_priv);
2816 }
2817 break;
2818 case RDMA_TRANSPORT_IWARP:
2819 ret = cma_accept_iw(id_priv, conn_param);
2820 break;
2821 default:
2822 ret = -ENOSYS;
2823 break;
2824 }
2825
2826 if (ret)
2827 goto reject;
2828
2829 return 0;
2830 reject:
2831 cma_modify_qp_err(id_priv);
2832 rdma_reject(id, NULL, 0);
2833 return ret;
2834 }
2835 EXPORT_SYMBOL(rdma_accept);
2836
2837 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2838 {
2839 struct rdma_id_private *id_priv;
2840 int ret;
2841
2842 id_priv = container_of(id, struct rdma_id_private, id);
2843 if (!id_priv->cm_id.ib)
2844 return -EINVAL;
2845
2846 switch (id->device->node_type) {
2847 case RDMA_NODE_IB_CA:
2848 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2849 break;
2850 default:
2851 ret = 0;
2852 break;
2853 }
2854 return ret;
2855 }
2856 EXPORT_SYMBOL(rdma_notify);
2857
2858 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2859 u8 private_data_len)
2860 {
2861 struct rdma_id_private *id_priv;
2862 int ret;
2863
2864 id_priv = container_of(id, struct rdma_id_private, id);
2865 if (!id_priv->cm_id.ib)
2866 return -EINVAL;
2867
2868 switch (rdma_node_get_transport(id->device->node_type)) {
2869 case RDMA_TRANSPORT_IB:
2870 if (id->qp_type == IB_QPT_UD)
2871 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2872 private_data, private_data_len);
2873 else
2874 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2875 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2876 0, private_data, private_data_len);
2877 break;
2878 case RDMA_TRANSPORT_IWARP:
2879 ret = iw_cm_reject(id_priv->cm_id.iw,
2880 private_data, private_data_len);
2881 break;
2882 default:
2883 ret = -ENOSYS;
2884 break;
2885 }
2886 return ret;
2887 }
2888 EXPORT_SYMBOL(rdma_reject);
2889
2890 int rdma_disconnect(struct rdma_cm_id *id)
2891 {
2892 struct rdma_id_private *id_priv;
2893 int ret;
2894
2895 id_priv = container_of(id, struct rdma_id_private, id);
2896 if (!id_priv->cm_id.ib)
2897 return -EINVAL;
2898
2899 switch (rdma_node_get_transport(id->device->node_type)) {
2900 case RDMA_TRANSPORT_IB:
2901 ret = cma_modify_qp_err(id_priv);
2902 if (ret)
2903 goto out;
2904 /* Initiate or respond to a disconnect. */
2905 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2906 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2907 break;
2908 case RDMA_TRANSPORT_IWARP:
2909 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2910 break;
2911 default:
2912 ret = -EINVAL;
2913 break;
2914 }
2915 out:
2916 return ret;
2917 }
2918 EXPORT_SYMBOL(rdma_disconnect);
2919
2920 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2921 {
2922 struct rdma_id_private *id_priv;
2923 struct cma_multicast *mc = multicast->context;
2924 struct rdma_cm_event event;
2925 int ret;
2926
2927 id_priv = mc->id_priv;
2928 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
2929 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
2930 return 0;
2931
2932 mutex_lock(&id_priv->qp_mutex);
2933 if (!status && id_priv->id.qp)
2934 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2935 be16_to_cpu(multicast->rec.mlid));
2936 mutex_unlock(&id_priv->qp_mutex);
2937
2938 memset(&event, 0, sizeof event);
2939 event.status = status;
2940 event.param.ud.private_data = mc->context;
2941 if (!status) {
2942 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2943 ib_init_ah_from_mcmember(id_priv->id.device,
2944 id_priv->id.port_num, &multicast->rec,
2945 &event.param.ud.ah_attr);
2946 event.param.ud.qp_num = 0xFFFFFF;
2947 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2948 } else
2949 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2950
2951 ret = id_priv->id.event_handler(&id_priv->id, &event);
2952 if (ret) {
2953 cma_exch(id_priv, RDMA_CM_DESTROYING);
2954 mutex_unlock(&id_priv->handler_mutex);
2955 rdma_destroy_id(&id_priv->id);
2956 return 0;
2957 }
2958
2959 mutex_unlock(&id_priv->handler_mutex);
2960 return 0;
2961 }
2962
2963 static void cma_set_mgid(struct rdma_id_private *id_priv,
2964 struct sockaddr *addr, union ib_gid *mgid)
2965 {
2966 unsigned char mc_map[MAX_ADDR_LEN];
2967 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2968 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2969 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2970
2971 if (cma_any_addr(addr)) {
2972 memset(mgid, 0, sizeof *mgid);
2973 } else if ((addr->sa_family == AF_INET6) &&
2974 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
2975 0xFF10A01B)) {
2976 /* IPv6 address is an SA assigned MGID. */
2977 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2978 } else if ((addr->sa_family == AF_INET6)) {
2979 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2980 if (id_priv->id.ps == RDMA_PS_UDP)
2981 mc_map[7] = 0x01; /* Use RDMA CM signature */
2982 *mgid = *(union ib_gid *) (mc_map + 4);
2983 } else {
2984 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
2985 if (id_priv->id.ps == RDMA_PS_UDP)
2986 mc_map[7] = 0x01; /* Use RDMA CM signature */
2987 *mgid = *(union ib_gid *) (mc_map + 4);
2988 }
2989 }
2990
2991 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2992 struct cma_multicast *mc)
2993 {
2994 struct ib_sa_mcmember_rec rec;
2995 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2996 ib_sa_comp_mask comp_mask;
2997 int ret;
2998
2999 ib_addr_get_mgid(dev_addr, &rec.mgid);
3000 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3001 &rec.mgid, &rec);
3002 if (ret)
3003 return ret;
3004
3005 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3006 if (id_priv->id.ps == RDMA_PS_UDP)
3007 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3008 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3009 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3010 rec.join_state = 1;
3011
3012 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3013 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3014 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3015 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3016 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3017
3018 if (id_priv->id.ps == RDMA_PS_IPOIB)
3019 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3020 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
3021
3022 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3023 id_priv->id.port_num, &rec,
3024 comp_mask, GFP_KERNEL,
3025 cma_ib_mc_handler, mc);
3026 if (IS_ERR(mc->multicast.ib))
3027 return PTR_ERR(mc->multicast.ib);
3028
3029 return 0;
3030 }
3031
3032 static void iboe_mcast_work_handler(struct work_struct *work)
3033 {
3034 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3035 struct cma_multicast *mc = mw->mc;
3036 struct ib_sa_multicast *m = mc->multicast.ib;
3037
3038 mc->multicast.ib->context = mc;
3039 cma_ib_mc_handler(0, m);
3040 kref_put(&mc->mcref, release_mc);
3041 kfree(mw);
3042 }
3043
3044 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3045 {
3046 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3047 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3048
3049 if (cma_any_addr(addr)) {
3050 memset(mgid, 0, sizeof *mgid);
3051 } else if (addr->sa_family == AF_INET6) {
3052 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3053 } else {
3054 mgid->raw[0] = 0xff;
3055 mgid->raw[1] = 0x0e;
3056 mgid->raw[2] = 0;
3057 mgid->raw[3] = 0;
3058 mgid->raw[4] = 0;
3059 mgid->raw[5] = 0;
3060 mgid->raw[6] = 0;
3061 mgid->raw[7] = 0;
3062 mgid->raw[8] = 0;
3063 mgid->raw[9] = 0;
3064 mgid->raw[10] = 0xff;
3065 mgid->raw[11] = 0xff;
3066 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3067 }
3068 }
3069
3070 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3071 struct cma_multicast *mc)
3072 {
3073 struct iboe_mcast_work *work;
3074 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3075 int err;
3076 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3077 struct net_device *ndev = NULL;
3078
3079 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3080 return -EINVAL;
3081
3082 work = kzalloc(sizeof *work, GFP_KERNEL);
3083 if (!work)
3084 return -ENOMEM;
3085
3086 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3087 if (!mc->multicast.ib) {
3088 err = -ENOMEM;
3089 goto out1;
3090 }
3091
3092 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3093
3094 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3095 if (id_priv->id.ps == RDMA_PS_UDP)
3096 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3097
3098 if (dev_addr->bound_dev_if)
3099 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3100 if (!ndev) {
3101 err = -ENODEV;
3102 goto out2;
3103 }
3104 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3105 mc->multicast.ib->rec.hop_limit = 1;
3106 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3107 dev_put(ndev);
3108 if (!mc->multicast.ib->rec.mtu) {
3109 err = -EINVAL;
3110 goto out2;
3111 }
3112 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3113 work->id = id_priv;
3114 work->mc = mc;
3115 INIT_WORK(&work->work, iboe_mcast_work_handler);
3116 kref_get(&mc->mcref);
3117 queue_work(cma_wq, &work->work);
3118
3119 return 0;
3120
3121 out2:
3122 kfree(mc->multicast.ib);
3123 out1:
3124 kfree(work);
3125 return err;
3126 }
3127
3128 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3129 void *context)
3130 {
3131 struct rdma_id_private *id_priv;
3132 struct cma_multicast *mc;
3133 int ret;
3134
3135 id_priv = container_of(id, struct rdma_id_private, id);
3136 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3137 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3138 return -EINVAL;
3139
3140 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3141 if (!mc)
3142 return -ENOMEM;
3143
3144 memcpy(&mc->addr, addr, ip_addr_size(addr));
3145 mc->context = context;
3146 mc->id_priv = id_priv;
3147
3148 spin_lock(&id_priv->lock);
3149 list_add(&mc->list, &id_priv->mc_list);
3150 spin_unlock(&id_priv->lock);
3151
3152 switch (rdma_node_get_transport(id->device->node_type)) {
3153 case RDMA_TRANSPORT_IB:
3154 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3155 case IB_LINK_LAYER_INFINIBAND:
3156 ret = cma_join_ib_multicast(id_priv, mc);
3157 break;
3158 case IB_LINK_LAYER_ETHERNET:
3159 kref_init(&mc->mcref);
3160 ret = cma_iboe_join_multicast(id_priv, mc);
3161 break;
3162 default:
3163 ret = -EINVAL;
3164 }
3165 break;
3166 default:
3167 ret = -ENOSYS;
3168 break;
3169 }
3170
3171 if (ret) {
3172 spin_lock_irq(&id_priv->lock);
3173 list_del(&mc->list);
3174 spin_unlock_irq(&id_priv->lock);
3175 kfree(mc);
3176 }
3177 return ret;
3178 }
3179 EXPORT_SYMBOL(rdma_join_multicast);
3180
3181 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3182 {
3183 struct rdma_id_private *id_priv;
3184 struct cma_multicast *mc;
3185
3186 id_priv = container_of(id, struct rdma_id_private, id);
3187 spin_lock_irq(&id_priv->lock);
3188 list_for_each_entry(mc, &id_priv->mc_list, list) {
3189 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3190 list_del(&mc->list);
3191 spin_unlock_irq(&id_priv->lock);
3192
3193 if (id->qp)
3194 ib_detach_mcast(id->qp,
3195 &mc->multicast.ib->rec.mgid,
3196 be16_to_cpu(mc->multicast.ib->rec.mlid));
3197 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3198 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3199 case IB_LINK_LAYER_INFINIBAND:
3200 ib_sa_free_multicast(mc->multicast.ib);
3201 kfree(mc);
3202 break;
3203 case IB_LINK_LAYER_ETHERNET:
3204 kref_put(&mc->mcref, release_mc);
3205 break;
3206 default:
3207 break;
3208 }
3209 }
3210 return;
3211 }
3212 }
3213 spin_unlock_irq(&id_priv->lock);
3214 }
3215 EXPORT_SYMBOL(rdma_leave_multicast);
3216
3217 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3218 {
3219 struct rdma_dev_addr *dev_addr;
3220 struct cma_ndev_work *work;
3221
3222 dev_addr = &id_priv->id.route.addr.dev_addr;
3223
3224 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3225 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3226 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3227 ndev->name, &id_priv->id);
3228 work = kzalloc(sizeof *work, GFP_KERNEL);
3229 if (!work)
3230 return -ENOMEM;
3231
3232 INIT_WORK(&work->work, cma_ndev_work_handler);
3233 work->id = id_priv;
3234 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3235 atomic_inc(&id_priv->refcount);
3236 queue_work(cma_wq, &work->work);
3237 }
3238
3239 return 0;
3240 }
3241
3242 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3243 void *ctx)
3244 {
3245 struct net_device *ndev = (struct net_device *)ctx;
3246 struct cma_device *cma_dev;
3247 struct rdma_id_private *id_priv;
3248 int ret = NOTIFY_DONE;
3249
3250 if (dev_net(ndev) != &init_net)
3251 return NOTIFY_DONE;
3252
3253 if (event != NETDEV_BONDING_FAILOVER)
3254 return NOTIFY_DONE;
3255
3256 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3257 return NOTIFY_DONE;
3258
3259 mutex_lock(&lock);
3260 list_for_each_entry(cma_dev, &dev_list, list)
3261 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3262 ret = cma_netdev_change(ndev, id_priv);
3263 if (ret)
3264 goto out;
3265 }
3266
3267 out:
3268 mutex_unlock(&lock);
3269 return ret;
3270 }
3271
3272 static struct notifier_block cma_nb = {
3273 .notifier_call = cma_netdev_callback
3274 };
3275
3276 static void cma_add_one(struct ib_device *device)
3277 {
3278 struct cma_device *cma_dev;
3279 struct rdma_id_private *id_priv;
3280
3281 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3282 if (!cma_dev)
3283 return;
3284
3285 cma_dev->device = device;
3286
3287 init_completion(&cma_dev->comp);
3288 atomic_set(&cma_dev->refcount, 1);
3289 INIT_LIST_HEAD(&cma_dev->id_list);
3290 ib_set_client_data(device, &cma_client, cma_dev);
3291
3292 mutex_lock(&lock);
3293 list_add_tail(&cma_dev->list, &dev_list);
3294 list_for_each_entry(id_priv, &listen_any_list, list)
3295 cma_listen_on_dev(id_priv, cma_dev);
3296 mutex_unlock(&lock);
3297 }
3298
3299 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3300 {
3301 struct rdma_cm_event event;
3302 enum rdma_cm_state state;
3303 int ret = 0;
3304
3305 /* Record that we want to remove the device */
3306 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3307 if (state == RDMA_CM_DESTROYING)
3308 return 0;
3309
3310 cma_cancel_operation(id_priv, state);
3311 mutex_lock(&id_priv->handler_mutex);
3312
3313 /* Check for destruction from another callback. */
3314 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3315 goto out;
3316
3317 memset(&event, 0, sizeof event);
3318 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3319 ret = id_priv->id.event_handler(&id_priv->id, &event);
3320 out:
3321 mutex_unlock(&id_priv->handler_mutex);
3322 return ret;
3323 }
3324
3325 static void cma_process_remove(struct cma_device *cma_dev)
3326 {
3327 struct rdma_id_private *id_priv;
3328 int ret;
3329
3330 mutex_lock(&lock);
3331 while (!list_empty(&cma_dev->id_list)) {
3332 id_priv = list_entry(cma_dev->id_list.next,
3333 struct rdma_id_private, list);
3334
3335 list_del(&id_priv->listen_list);
3336 list_del_init(&id_priv->list);
3337 atomic_inc(&id_priv->refcount);
3338 mutex_unlock(&lock);
3339
3340 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3341 cma_deref_id(id_priv);
3342 if (ret)
3343 rdma_destroy_id(&id_priv->id);
3344
3345 mutex_lock(&lock);
3346 }
3347 mutex_unlock(&lock);
3348
3349 cma_deref_dev(cma_dev);
3350 wait_for_completion(&cma_dev->comp);
3351 }
3352
3353 static void cma_remove_one(struct ib_device *device)
3354 {
3355 struct cma_device *cma_dev;
3356
3357 cma_dev = ib_get_client_data(device, &cma_client);
3358 if (!cma_dev)
3359 return;
3360
3361 mutex_lock(&lock);
3362 list_del(&cma_dev->list);
3363 mutex_unlock(&lock);
3364
3365 cma_process_remove(cma_dev);
3366 kfree(cma_dev);
3367 }
3368
3369 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3370 {
3371 struct nlmsghdr *nlh;
3372 struct rdma_cm_id_stats *id_stats;
3373 struct rdma_id_private *id_priv;
3374 struct rdma_cm_id *id = NULL;
3375 struct cma_device *cma_dev;
3376 int i_dev = 0, i_id = 0;
3377
3378 /*
3379 * We export all of the IDs as a sequence of messages. Each
3380 * ID gets its own netlink message.
3381 */
3382 mutex_lock(&lock);
3383
3384 list_for_each_entry(cma_dev, &dev_list, list) {
3385 if (i_dev < cb->args[0]) {
3386 i_dev++;
3387 continue;
3388 }
3389
3390 i_id = 0;
3391 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3392 if (i_id < cb->args[1]) {
3393 i_id++;
3394 continue;
3395 }
3396
3397 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3398 sizeof *id_stats, RDMA_NL_RDMA_CM,
3399 RDMA_NL_RDMA_CM_ID_STATS);
3400 if (!id_stats)
3401 goto out;
3402
3403 memset(id_stats, 0, sizeof *id_stats);
3404 id = &id_priv->id;
3405 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3406 id_stats->port_num = id->port_num;
3407 id_stats->bound_dev_if =
3408 id->route.addr.dev_addr.bound_dev_if;
3409
3410 if (id->route.addr.src_addr.ss_family == AF_INET) {
3411 if (ibnl_put_attr(skb, nlh,
3412 sizeof(struct sockaddr_in),
3413 &id->route.addr.src_addr,
3414 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3415 goto out;
3416 }
3417 if (ibnl_put_attr(skb, nlh,
3418 sizeof(struct sockaddr_in),
3419 &id->route.addr.dst_addr,
3420 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3421 goto out;
3422 }
3423 } else if (id->route.addr.src_addr.ss_family == AF_INET6) {
3424 if (ibnl_put_attr(skb, nlh,
3425 sizeof(struct sockaddr_in6),
3426 &id->route.addr.src_addr,
3427 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3428 goto out;
3429 }
3430 if (ibnl_put_attr(skb, nlh,
3431 sizeof(struct sockaddr_in6),
3432 &id->route.addr.dst_addr,
3433 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3434 goto out;
3435 }
3436 }
3437
3438 id_stats->pid = id_priv->owner;
3439 id_stats->port_space = id->ps;
3440 id_stats->cm_state = id_priv->state;
3441 id_stats->qp_num = id_priv->qp_num;
3442 id_stats->qp_type = id->qp_type;
3443
3444 i_id++;
3445 }
3446
3447 cb->args[1] = 0;
3448 i_dev++;
3449 }
3450
3451 out:
3452 mutex_unlock(&lock);
3453 cb->args[0] = i_dev;
3454 cb->args[1] = i_id;
3455
3456 return skb->len;
3457 }
3458
3459 static const struct ibnl_client_cbs cma_cb_table[] = {
3460 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats },
3461 };
3462
3463 static int __init cma_init(void)
3464 {
3465 int ret;
3466
3467 cma_wq = create_singlethread_workqueue("rdma_cm");
3468 if (!cma_wq)
3469 return -ENOMEM;
3470
3471 ib_sa_register_client(&sa_client);
3472 rdma_addr_register_client(&addr_client);
3473 register_netdevice_notifier(&cma_nb);
3474
3475 ret = ib_register_client(&cma_client);
3476 if (ret)
3477 goto err;
3478
3479 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3480 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3481
3482 return 0;
3483
3484 err:
3485 unregister_netdevice_notifier(&cma_nb);
3486 rdma_addr_unregister_client(&addr_client);
3487 ib_sa_unregister_client(&sa_client);
3488 destroy_workqueue(cma_wq);
3489 return ret;
3490 }
3491
3492 static void __exit cma_cleanup(void)
3493 {
3494 ibnl_remove_client(RDMA_NL_RDMA_CM);
3495 ib_unregister_client(&cma_client);
3496 unregister_netdevice_notifier(&cma_nb);
3497 rdma_addr_unregister_client(&addr_client);
3498 ib_sa_unregister_client(&sa_client);
3499 destroy_workqueue(cma_wq);
3500 idr_destroy(&sdp_ps);
3501 idr_destroy(&tcp_ps);
3502 idr_destroy(&udp_ps);
3503 idr_destroy(&ipoib_ps);
3504 idr_destroy(&ib_ps);
3505 }
3506
3507 module_init(cma_init);
3508 module_exit(cma_cleanup);
Linux kernel - Deliverables
This page took 0.102817 seconds and 5 git commands to generate.