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RDMA/cma: Listen on specific address family
[mirror_ubuntu-jammy-kernel.git] / drivers / infiniband / core / ucma.c
CommitLineData
75216638
SH		 1/*
2 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#include <linux/completion.h>
88314e4d 34#include <linux/file.h>
75216638
SH		 35#include <linux/mutex.h>
36#include <linux/poll.h>
d43c36dc 37#include <linux/sched.h>
75216638
SH		 38#include <linux/idr.h>
39#include <linux/in.h>
40#include <linux/in6.h>
41#include <linux/miscdevice.h>
5a0e3ad6 42#include <linux/slab.h>
97cb7e40 43#include <linux/sysctl.h>
e4dd23d7 44#include <linux/module.h>
75216638
SH		 45
46#include <rdma/rdma_user_cm.h>
47#include <rdma/ib_marshall.h>
48#include <rdma/rdma_cm.h>
a7ca1f00 49#include <rdma/rdma_cm_ib.h>
75216638
SH		 50
51MODULE_AUTHOR("Sean Hefty");
52MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access");
53MODULE_LICENSE("Dual BSD/GPL");
54
97cb7e40
SW		 55static unsigned int max_backlog = 1024;
56
57static struct ctl_table_header *ucma_ctl_table_hdr;
58static ctl_table ucma_ctl_table[] = {
59 {
60 .procname = "max_backlog",
61 .data = &max_backlog,
62 .maxlen = sizeof max_backlog,
63 .mode = 0644,
64 .proc_handler = proc_dointvec,
65 },
66 { }
67};
68
75216638
SH		 69struct ucma_file {
70 struct mutex mut;
71 struct file *filp;
72 struct list_head ctx_list;
73 struct list_head event_list;
74 wait_queue_head_t poll_wait;
75};
76
77struct ucma_context {
78 int id;
79 struct completion comp;
80 atomic_t ref;
81 int events_reported;
82 int backlog;
83
84 struct ucma_file *file;
85 struct rdma_cm_id *cm_id;
86 u64 uid;
87
88 struct list_head list;
c8f6a362
SH		 89 struct list_head mc_list;
90};
91
92struct ucma_multicast {
93 struct ucma_context *ctx;
94 int id;
95 int events_reported;
96
97 u64 uid;
98 struct list_head list;
3f446754 99 struct sockaddr_storage addr;
75216638
SH		 100};
101
102struct ucma_event {
103 struct ucma_context *ctx;
c8f6a362 104 struct ucma_multicast *mc;
75216638
SH		 105 struct list_head list;
106 struct rdma_cm_id *cm_id;
107 struct rdma_ucm_event_resp resp;
108};
109
110static DEFINE_MUTEX(mut);
111static DEFINE_IDR(ctx_idr);
c8f6a362 112static DEFINE_IDR(multicast_idr);
75216638
SH		 113
114static inline struct ucma_context *_ucma_find_context(int id,
115 struct ucma_file *file)
116{
117 struct ucma_context *ctx;
118
119 ctx = idr_find(&ctx_idr, id);
120 if (!ctx)
121 ctx = ERR_PTR(-ENOENT);
122 else if (ctx->file != file)
123 ctx = ERR_PTR(-EINVAL);
124 return ctx;
125}
126
127static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id)
128{
129 struct ucma_context *ctx;
130
131 mutex_lock(&mut);
132 ctx = _ucma_find_context(id, file);
133 if (!IS_ERR(ctx))
134 atomic_inc(&ctx->ref);
135 mutex_unlock(&mut);
136 return ctx;
137}
138
139static void ucma_put_ctx(struct ucma_context *ctx)
140{
141 if (atomic_dec_and_test(&ctx->ref))
142 complete(&ctx->comp);
143}
144
145static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file)
146{
147 struct ucma_context *ctx;
148 int ret;
149
150 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
151 if (!ctx)
152 return NULL;
153
154 atomic_set(&ctx->ref, 1);
155 init_completion(&ctx->comp);
c8f6a362 156 INIT_LIST_HEAD(&ctx->mc_list);
75216638
SH		 157 ctx->file = file;
158
159 do {
160 ret = idr_pre_get(&ctx_idr, GFP_KERNEL);
161 if (!ret)
162 goto error;
163
164 mutex_lock(&mut);
165 ret = idr_get_new(&ctx_idr, ctx, &ctx->id);
166 mutex_unlock(&mut);
167 } while (ret == -EAGAIN);
168
169 if (ret)
170 goto error;
171
172 list_add_tail(&ctx->list, &file->ctx_list);
173 return ctx;
174
175error:
176 kfree(ctx);
177 return NULL;
178}
179
c8f6a362
SH		 180static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx)
181{
182 struct ucma_multicast *mc;
183 int ret;
184
185 mc = kzalloc(sizeof(*mc), GFP_KERNEL);
186 if (!mc)
187 return NULL;
188
189 do {
190 ret = idr_pre_get(&multicast_idr, GFP_KERNEL);
191 if (!ret)
192 goto error;
193
194 mutex_lock(&mut);
195 ret = idr_get_new(&multicast_idr, mc, &mc->id);
196 mutex_unlock(&mut);
197 } while (ret == -EAGAIN);
198
199 if (ret)
200 goto error;
201
202 mc->ctx = ctx;
203 list_add_tail(&mc->list, &ctx->mc_list);
204 return mc;
205
206error:
207 kfree(mc);
208 return NULL;
209}
210
75216638
SH		 211static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst,
212 struct rdma_conn_param *src)
213{
214 if (src->private_data_len)
215 memcpy(dst->private_data, src->private_data,
216 src->private_data_len);
217 dst->private_data_len = src->private_data_len;
218 dst->responder_resources =src->responder_resources;
219 dst->initiator_depth = src->initiator_depth;
220 dst->flow_control = src->flow_control;
221 dst->retry_count = src->retry_count;
222 dst->rnr_retry_count = src->rnr_retry_count;
223 dst->srq = src->srq;
224 dst->qp_num = src->qp_num;
225}
226
227static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst,
228 struct rdma_ud_param *src)
229{
230 if (src->private_data_len)
231 memcpy(dst->private_data, src->private_data,
232 src->private_data_len);
233 dst->private_data_len = src->private_data_len;
234 ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr);
235 dst->qp_num = src->qp_num;
236 dst->qkey = src->qkey;
237}
238
239static void ucma_set_event_context(struct ucma_context *ctx,
240 struct rdma_cm_event *event,
241 struct ucma_event *uevent)
242{
243 uevent->ctx = ctx;
c8f6a362
SH		 244 switch (event->event) {
245 case RDMA_CM_EVENT_MULTICAST_JOIN:
246 case RDMA_CM_EVENT_MULTICAST_ERROR:
247 uevent->mc = (struct ucma_multicast *)
248 event->param.ud.private_data;
249 uevent->resp.uid = uevent->mc->uid;
250 uevent->resp.id = uevent->mc->id;
251 break;
252 default:
253 uevent->resp.uid = ctx->uid;
254 uevent->resp.id = ctx->id;
255 break;
256 }
75216638
SH		 257}
258
259static int ucma_event_handler(struct rdma_cm_id *cm_id,
260 struct rdma_cm_event *event)
261{
262 struct ucma_event *uevent;
263 struct ucma_context *ctx = cm_id->context;
264 int ret = 0;
265
266 uevent = kzalloc(sizeof(*uevent), GFP_KERNEL);
267 if (!uevent)
268 return event->event == RDMA_CM_EVENT_CONNECT_REQUEST;
269
270 uevent->cm_id = cm_id;
271 ucma_set_event_context(ctx, event, uevent);
272 uevent->resp.event = event->event;
273 uevent->resp.status = event->status;
638ef7a6 274 if (cm_id->qp_type == IB_QPT_UD)
75216638
SH		 275 ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud);
276 else
277 ucma_copy_conn_event(&uevent->resp.param.conn,
278 &event->param.conn);
279
280 mutex_lock(&ctx->file->mut);
281 if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) {
282 if (!ctx->backlog) {
3492856e 283 ret = -ENOMEM;
30a5ec98 284 kfree(uevent);
75216638
SH		 285 goto out;
286 }
287 ctx->backlog--;
0cefcf0b
SH		 288 } else if (!ctx->uid) {
289 /*
290 * We ignore events for new connections until userspace has set
291 * their context. This can only happen if an error occurs on a
292 * new connection before the user accepts it. This is okay,
293 * since the accept will just fail later.
294 */
295 kfree(uevent);
296 goto out;
75216638 297 }
0cefcf0b 298
75216638
SH		 299 list_add_tail(&uevent->list, &ctx->file->event_list);
300 wake_up_interruptible(&ctx->file->poll_wait);
301out:
302 mutex_unlock(&ctx->file->mut);
303 return ret;
304}
305
306static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf,
307 int in_len, int out_len)
308{
309 struct ucma_context *ctx;
310 struct rdma_ucm_get_event cmd;
311 struct ucma_event *uevent;
312 int ret = 0;
313 DEFINE_WAIT(wait);
314
315 if (out_len < sizeof uevent->resp)
316 return -ENOSPC;
317
318 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
319 return -EFAULT;
320
321 mutex_lock(&file->mut);
322 while (list_empty(&file->event_list)) {
d92f7644 323 mutex_unlock(&file->mut);
75216638 324
d92f7644
SH		 325 if (file->filp->f_flags & O_NONBLOCK)
326 return -EAGAIN;
327
328 if (wait_event_interruptible(file->poll_wait,
329 !list_empty(&file->event_list)))
330 return -ERESTARTSYS;
75216638 331
75216638 332 mutex_lock(&file->mut);
75216638
SH		 333 }
334
75216638
SH		 335 uevent = list_entry(file->event_list.next, struct ucma_event, list);
336
337 if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) {
338 ctx = ucma_alloc_ctx(file);
339 if (!ctx) {
340 ret = -ENOMEM;
341 goto done;
342 }
343 uevent->ctx->backlog++;
344 ctx->cm_id = uevent->cm_id;
345 ctx->cm_id->context = ctx;
346 uevent->resp.id = ctx->id;
347 }
348
349 if (copy_to_user((void __user *)(unsigned long)cmd.response,
350 &uevent->resp, sizeof uevent->resp)) {
351 ret = -EFAULT;
352 goto done;
353 }
354
355 list_del(&uevent->list);
356 uevent->ctx->events_reported++;
c8f6a362
SH		 357 if (uevent->mc)
358 uevent->mc->events_reported++;
75216638
SH		 359 kfree(uevent);
360done:
361 mutex_unlock(&file->mut);
362 return ret;
363}
364
b26f9b99
SH		 365static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type)
366{
367 switch (cmd->ps) {
368 case RDMA_PS_TCP:
369 *qp_type = IB_QPT_RC;
370 return 0;
371 case RDMA_PS_UDP:
372 case RDMA_PS_IPOIB:
373 *qp_type = IB_QPT_UD;
374 return 0;
638ef7a6
SH		 375 case RDMA_PS_IB:
376 *qp_type = cmd->qp_type;
377 return 0;
b26f9b99
SH		 378 default:
379 return -EINVAL;
380 }
381}
382
383static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf,
384 int in_len, int out_len)
75216638
SH		 385{
386 struct rdma_ucm_create_id cmd;
387 struct rdma_ucm_create_id_resp resp;
388 struct ucma_context *ctx;
b26f9b99 389 enum ib_qp_type qp_type;
75216638
SH		 390 int ret;
391
392 if (out_len < sizeof(resp))
393 return -ENOSPC;
394
395 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
396 return -EFAULT;
397
b26f9b99
SH		 398 ret = ucma_get_qp_type(&cmd, &qp_type);
399 if (ret)
400 return ret;
401
75216638
SH		 402 mutex_lock(&file->mut);
403 ctx = ucma_alloc_ctx(file);
404 mutex_unlock(&file->mut);
405 if (!ctx)
406 return -ENOMEM;
407
408 ctx->uid = cmd.uid;
b26f9b99 409 ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps, qp_type);
75216638
SH		 410 if (IS_ERR(ctx->cm_id)) {
411 ret = PTR_ERR(ctx->cm_id);
412 goto err1;
413 }
414
415 resp.id = ctx->id;
416 if (copy_to_user((void __user *)(unsigned long)cmd.response,
417 &resp, sizeof(resp))) {
418 ret = -EFAULT;
419 goto err2;
420 }
421 return 0;
422
423err2:
424 rdma_destroy_id(ctx->cm_id);
425err1:
426 mutex_lock(&mut);
427 idr_remove(&ctx_idr, ctx->id);
428 mutex_unlock(&mut);
429 kfree(ctx);
430 return ret;
431}
432
c8f6a362
SH		 433static void ucma_cleanup_multicast(struct ucma_context *ctx)
434{
435 struct ucma_multicast *mc, *tmp;
436
437 mutex_lock(&mut);
438 list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) {
439 list_del(&mc->list);
440 idr_remove(&multicast_idr, mc->id);
441 kfree(mc);
442 }
443 mutex_unlock(&mut);
444}
445
c8f6a362
SH		 446static void ucma_cleanup_mc_events(struct ucma_multicast *mc)
447{
448 struct ucma_event *uevent, *tmp;
449
450 list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) {
451 if (uevent->mc != mc)
452 continue;
453
454 list_del(&uevent->list);
455 kfree(uevent);
456 }
457}
458
186834b5
HS		 459/*
460 * We cannot hold file->mut when calling rdma_destroy_id() or we can
461 * deadlock. We also acquire file->mut in ucma_event_handler(), and
462 * rdma_destroy_id() will wait until all callbacks have completed.
463 */
75216638
SH		 464static int ucma_free_ctx(struct ucma_context *ctx)
465{
466 int events_reported;
186834b5
HS		 467 struct ucma_event *uevent, *tmp;
468 LIST_HEAD(list);
75216638
SH		 469
470 /* No new events will be generated after destroying the id. */
471 rdma_destroy_id(ctx->cm_id);
472
c8f6a362
SH		 473 ucma_cleanup_multicast(ctx);
474
75216638
SH		 475 /* Cleanup events not yet reported to the user. */
476 mutex_lock(&ctx->file->mut);
186834b5
HS		 477 list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) {
478 if (uevent->ctx == ctx)
479 list_move_tail(&uevent->list, &list);
480 }
75216638
SH		 481 list_del(&ctx->list);
482 mutex_unlock(&ctx->file->mut);
483
186834b5
HS		 484 list_for_each_entry_safe(uevent, tmp, &list, list) {
485 list_del(&uevent->list);
486 if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST)
487 rdma_destroy_id(uevent->cm_id);
488 kfree(uevent);
489 }
490
75216638
SH		 491 events_reported = ctx->events_reported;
492 kfree(ctx);
493 return events_reported;
494}
495
496static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf,
497 int in_len, int out_len)
498{
499 struct rdma_ucm_destroy_id cmd;
500 struct rdma_ucm_destroy_id_resp resp;
501 struct ucma_context *ctx;
502 int ret = 0;
503
504 if (out_len < sizeof(resp))
505 return -ENOSPC;
506
507 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
508 return -EFAULT;
509
510 mutex_lock(&mut);
511 ctx = _ucma_find_context(cmd.id, file);
512 if (!IS_ERR(ctx))
513 idr_remove(&ctx_idr, ctx->id);
514 mutex_unlock(&mut);
515
516 if (IS_ERR(ctx))
517 return PTR_ERR(ctx);
518
519 ucma_put_ctx(ctx);
520 wait_for_completion(&ctx->comp);
521 resp.events_reported = ucma_free_ctx(ctx);
522
523 if (copy_to_user((void __user *)(unsigned long)cmd.response,
524 &resp, sizeof(resp)))
525 ret = -EFAULT;
526
527 return ret;
528}
529
530static ssize_t ucma_bind_addr(struct ucma_file *file, const char __user *inbuf,
531 int in_len, int out_len)
532{
533 struct rdma_ucm_bind_addr cmd;
534 struct ucma_context *ctx;
535 int ret;
536
537 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
538 return -EFAULT;
539
540 ctx = ucma_get_ctx(file, cmd.id);
541 if (IS_ERR(ctx))
542 return PTR_ERR(ctx);
543
544 ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr);
545 ucma_put_ctx(ctx);
546 return ret;
547}
548
549static ssize_t ucma_resolve_addr(struct ucma_file *file,
550 const char __user *inbuf,
551 int in_len, int out_len)
552{
553 struct rdma_ucm_resolve_addr cmd;
554 struct ucma_context *ctx;
555 int ret;
556
557 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
558 return -EFAULT;
559
560 ctx = ucma_get_ctx(file, cmd.id);
561 if (IS_ERR(ctx))
562 return PTR_ERR(ctx);
563
564 ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr,
565 (struct sockaddr *) &cmd.dst_addr,
566 cmd.timeout_ms);
567 ucma_put_ctx(ctx);
568 return ret;
569}
570
571static ssize_t ucma_resolve_route(struct ucma_file *file,
572 const char __user *inbuf,
573 int in_len, int out_len)
574{
575 struct rdma_ucm_resolve_route cmd;
576 struct ucma_context *ctx;
577 int ret;
578
579 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
580 return -EFAULT;
581
582 ctx = ucma_get_ctx(file, cmd.id);
583 if (IS_ERR(ctx))
584 return PTR_ERR(ctx);
585
586 ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms);
587 ucma_put_ctx(ctx);
588 return ret;
589}
590
591static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp,
592 struct rdma_route *route)
593{
594 struct rdma_dev_addr *dev_addr;
595
596 resp->num_paths = route->num_paths;
597 switch (route->num_paths) {
598 case 0:
599 dev_addr = &route->addr.dev_addr;
6f8372b6
SH		 600 rdma_addr_get_dgid(dev_addr,
601 (union ib_gid *) &resp->ib_route[0].dgid);
602 rdma_addr_get_sgid(dev_addr,
603 (union ib_gid *) &resp->ib_route[0].sgid);
75216638
SH		 604 resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
605 break;
606 case 2:
607 ib_copy_path_rec_to_user(&resp->ib_route[1],
608 &route->path_rec[1]);
609 /* fall through */
610 case 1:
611 ib_copy_path_rec_to_user(&resp->ib_route[0],
612 &route->path_rec[0]);
613 break;
614 default:
615 break;
616 }
617}
618
3c86aa70
EC		 619static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp,
620 struct rdma_route *route)
621{
622 struct rdma_dev_addr *dev_addr;
af7bd463
EC		 623 struct net_device *dev;
624 u16 vid = 0;
3c86aa70
EC		 625
626 resp->num_paths = route->num_paths;
627 switch (route->num_paths) {
628 case 0:
629 dev_addr = &route->addr.dev_addr;
af7bd463
EC		 630 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
631 if (dev) {
632 vid = rdma_vlan_dev_vlan_id(dev);
633 dev_put(dev);
634 }
635
636 iboe_mac_vlan_to_ll((union ib_gid *) &resp->ib_route[0].dgid,
637 dev_addr->dst_dev_addr, vid);
3c86aa70
EC		 638 iboe_addr_get_sgid(dev_addr,
639 (union ib_gid *) &resp->ib_route[0].sgid);
640 resp->ib_route[0].pkey = cpu_to_be16(0xffff);
641 break;
642 case 2:
643 ib_copy_path_rec_to_user(&resp->ib_route[1],
644 &route->path_rec[1]);
645 /* fall through */
646 case 1:
647 ib_copy_path_rec_to_user(&resp->ib_route[0],
648 &route->path_rec[0]);
649 break;
650 default:
651 break;
652 }
653}
654
e86f8b06
SW		 655static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp,
656 struct rdma_route *route)
657{
658 struct rdma_dev_addr *dev_addr;
659
660 dev_addr = &route->addr.dev_addr;
661 rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid);
662 rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid);
663}
664
75216638
SH		 665static ssize_t ucma_query_route(struct ucma_file *file,
666 const char __user *inbuf,
667 int in_len, int out_len)
668{
669 struct rdma_ucm_query_route cmd;
670 struct rdma_ucm_query_route_resp resp;
671 struct ucma_context *ctx;
672 struct sockaddr *addr;
673 int ret = 0;
674
675 if (out_len < sizeof(resp))
676 return -ENOSPC;
677
678 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
679 return -EFAULT;
680
681 ctx = ucma_get_ctx(file, cmd.id);
682 if (IS_ERR(ctx))
683 return PTR_ERR(ctx);
684
685 memset(&resp, 0, sizeof resp);
3f446754 686 addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr;
75216638
SH		 687 memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ?
688 sizeof(struct sockaddr_in) :
689 sizeof(struct sockaddr_in6));
3f446754 690 addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr;
75216638
SH		 691 memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ?
692 sizeof(struct sockaddr_in) :
693 sizeof(struct sockaddr_in6));
694 if (!ctx->cm_id->device)
695 goto out;
696
9cda779c 697 resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid;
75216638 698 resp.port_num = ctx->cm_id->port_num;
e86f8b06
SW		 699 switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) {
700 case RDMA_TRANSPORT_IB:
701 switch (rdma_port_get_link_layer(ctx->cm_id->device,
702 ctx->cm_id->port_num)) {
3c86aa70
EC		 703 case IB_LINK_LAYER_INFINIBAND:
704 ucma_copy_ib_route(&resp, &ctx->cm_id->route);
705 break;
706 case IB_LINK_LAYER_ETHERNET:
707 ucma_copy_iboe_route(&resp, &ctx->cm_id->route);
708 break;
709 default:
710 break;
711 }
e86f8b06
SW		 712 break;
713 case RDMA_TRANSPORT_IWARP:
714 ucma_copy_iw_route(&resp, &ctx->cm_id->route);
715 break;
716 default:
717 break;
75216638
SH		 718 }
719
720out:
721 if (copy_to_user((void __user *)(unsigned long)cmd.response,
722 &resp, sizeof(resp)))
723 ret = -EFAULT;
724
725 ucma_put_ctx(ctx);
726 return ret;
727}
728
729static void ucma_copy_conn_param(struct rdma_conn_param *dst,
730 struct rdma_ucm_conn_param *src)
731{
732 dst->private_data = src->private_data;
733 dst->private_data_len = src->private_data_len;
734 dst->responder_resources =src->responder_resources;
735 dst->initiator_depth = src->initiator_depth;
736 dst->flow_control = src->flow_control;
737 dst->retry_count = src->retry_count;
738 dst->rnr_retry_count = src->rnr_retry_count;
739 dst->srq = src->srq;
740 dst->qp_num = src->qp_num;
741}
742
743static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
744 int in_len, int out_len)
745{
746 struct rdma_ucm_connect cmd;
747 struct rdma_conn_param conn_param;
748 struct ucma_context *ctx;
749 int ret;
750
751 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
752 return -EFAULT;
753
754 if (!cmd.conn_param.valid)
755 return -EINVAL;
756
757 ctx = ucma_get_ctx(file, cmd.id);
758 if (IS_ERR(ctx))
759 return PTR_ERR(ctx);
760
761 ucma_copy_conn_param(&conn_param, &cmd.conn_param);
762 ret = rdma_connect(ctx->cm_id, &conn_param);
763 ucma_put_ctx(ctx);
764 return ret;
765}
766
767static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf,
768 int in_len, int out_len)
769{
770 struct rdma_ucm_listen cmd;
771 struct ucma_context *ctx;
772 int ret;
773
774 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
775 return -EFAULT;
776
777 ctx = ucma_get_ctx(file, cmd.id);
778 if (IS_ERR(ctx))
779 return PTR_ERR(ctx);
780
97cb7e40
SW		 781 ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ?
782 cmd.backlog : max_backlog;
75216638
SH		 783 ret = rdma_listen(ctx->cm_id, ctx->backlog);
784 ucma_put_ctx(ctx);
785 return ret;
786}
787
788static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf,
789 int in_len, int out_len)
790{
791 struct rdma_ucm_accept cmd;
792 struct rdma_conn_param conn_param;
793 struct ucma_context *ctx;
794 int ret;
795
796 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
797 return -EFAULT;
798
799 ctx = ucma_get_ctx(file, cmd.id);
800 if (IS_ERR(ctx))
801 return PTR_ERR(ctx);
802
803 if (cmd.conn_param.valid) {
75216638 804 ucma_copy_conn_param(&conn_param, &cmd.conn_param);
9ced69ca 805 mutex_lock(&file->mut);
75216638 806 ret = rdma_accept(ctx->cm_id, &conn_param);
9ced69ca
SH		 807 if (!ret)
808 ctx->uid = cmd.uid;
809 mutex_unlock(&file->mut);
75216638
SH		 810 } else
811 ret = rdma_accept(ctx->cm_id, NULL);
812
813 ucma_put_ctx(ctx);
814 return ret;
815}
816
817static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf,
818 int in_len, int out_len)
819{
820 struct rdma_ucm_reject cmd;
821 struct ucma_context *ctx;
822 int ret;
823
824 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
825 return -EFAULT;
826
827 ctx = ucma_get_ctx(file, cmd.id);
828 if (IS_ERR(ctx))
829 return PTR_ERR(ctx);
830
831 ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len);
832 ucma_put_ctx(ctx);
833 return ret;
834}
835
836static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf,
837 int in_len, int out_len)
838{
839 struct rdma_ucm_disconnect cmd;
840 struct ucma_context *ctx;
841 int ret;
842
843 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
844 return -EFAULT;
845
846 ctx = ucma_get_ctx(file, cmd.id);
847 if (IS_ERR(ctx))
848 return PTR_ERR(ctx);
849
850 ret = rdma_disconnect(ctx->cm_id);
851 ucma_put_ctx(ctx);
852 return ret;
853}
854
855static ssize_t ucma_init_qp_attr(struct ucma_file *file,
856 const char __user *inbuf,
857 int in_len, int out_len)
858{
859 struct rdma_ucm_init_qp_attr cmd;
860 struct ib_uverbs_qp_attr resp;
861 struct ucma_context *ctx;
862 struct ib_qp_attr qp_attr;
863 int ret;
864
865 if (out_len < sizeof(resp))
866 return -ENOSPC;
867
868 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
869 return -EFAULT;
870
871 ctx = ucma_get_ctx(file, cmd.id);
872 if (IS_ERR(ctx))
873 return PTR_ERR(ctx);
874
875 resp.qp_attr_mask = 0;
876 memset(&qp_attr, 0, sizeof qp_attr);
877 qp_attr.qp_state = cmd.qp_state;
878 ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
879 if (ret)
880 goto out;
881
882 ib_copy_qp_attr_to_user(&resp, &qp_attr);
883 if (copy_to_user((void __user *)(unsigned long)cmd.response,
884 &resp, sizeof(resp)))
885 ret = -EFAULT;
886
887out:
888 ucma_put_ctx(ctx);
889 return ret;
890}
891
7ce86409
SH		 892static int ucma_set_option_id(struct ucma_context *ctx, int optname,
893 void *optval, size_t optlen)
894{
895 int ret = 0;
896
897 switch (optname) {
898 case RDMA_OPTION_ID_TOS:
899 if (optlen != sizeof(u8)) {
900 ret = -EINVAL;
901 break;
902 }
903 rdma_set_service_type(ctx->cm_id, *((u8 *) optval));
904 break;
a9bb7912
HS		 905 case RDMA_OPTION_ID_REUSEADDR:
906 if (optlen != sizeof(int)) {
907 ret = -EINVAL;
908 break;
909 }
910 ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0);
911 break;
7ce86409
SH		 912 default:
913 ret = -ENOSYS;
914 }
915
916 return ret;
917}
918
a7ca1f00
SH		 919static int ucma_set_ib_path(struct ucma_context *ctx,
920 struct ib_path_rec_data *path_data, size_t optlen)
921{
922 struct ib_sa_path_rec sa_path;
923 struct rdma_cm_event event;
924 int ret;
925
926 if (optlen % sizeof(*path_data))
927 return -EINVAL;
928
929 for (; optlen; optlen -= sizeof(*path_data), path_data++) {
930 if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY |
931 IB_PATH_BIDIRECTIONAL))
932 break;
933 }
934
935 if (!optlen)
936 return -EINVAL;
937
938 ib_sa_unpack_path(path_data->path_rec, &sa_path);
939 ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1);
940 if (ret)
941 return ret;
942
943 memset(&event, 0, sizeof event);
944 event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
945 return ucma_event_handler(ctx->cm_id, &event);
946}
947
948static int ucma_set_option_ib(struct ucma_context *ctx, int optname,
949 void *optval, size_t optlen)
950{
951 int ret;
952
953 switch (optname) {
954 case RDMA_OPTION_IB_PATH:
955 ret = ucma_set_ib_path(ctx, optval, optlen);
956 break;
957 default:
958 ret = -ENOSYS;
959 }
960
961 return ret;
962}
963
7ce86409
SH		 964static int ucma_set_option_level(struct ucma_context *ctx, int level,
965 int optname, void *optval, size_t optlen)
966{
967 int ret;
968
969 switch (level) {
970 case RDMA_OPTION_ID:
971 ret = ucma_set_option_id(ctx, optname, optval, optlen);
972 break;
a7ca1f00
SH		 973 case RDMA_OPTION_IB:
974 ret = ucma_set_option_ib(ctx, optname, optval, optlen);
975 break;
7ce86409
SH		 976 default:
977 ret = -ENOSYS;
978 }
979
980 return ret;
981}
982
983static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
984 int in_len, int out_len)
985{
986 struct rdma_ucm_set_option cmd;
987 struct ucma_context *ctx;
988 void *optval;
989 int ret;
990
991 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
992 return -EFAULT;
993
994 ctx = ucma_get_ctx(file, cmd.id);
995 if (IS_ERR(ctx))
996 return PTR_ERR(ctx);
997
998 optval = kmalloc(cmd.optlen, GFP_KERNEL);
999 if (!optval) {
1000 ret = -ENOMEM;
1001 goto out1;
1002 }
1003
1004 if (copy_from_user(optval, (void __user *) (unsigned long) cmd.optval,
1005 cmd.optlen)) {
1006 ret = -EFAULT;
1007 goto out2;
1008 }
1009
1010 ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval,
1011 cmd.optlen);
1012out2:
1013 kfree(optval);
1014out1:
1015 ucma_put_ctx(ctx);
1016 return ret;
1017}
1018
75216638
SH		 1019static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf,
1020 int in_len, int out_len)
1021{
1022 struct rdma_ucm_notify cmd;
1023 struct ucma_context *ctx;
1024 int ret;
1025
1026 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1027 return -EFAULT;
1028
1029 ctx = ucma_get_ctx(file, cmd.id);
1030 if (IS_ERR(ctx))
1031 return PTR_ERR(ctx);
1032
1033 ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event);
1034 ucma_put_ctx(ctx);
1035 return ret;
1036}
1037
c8f6a362
SH		 1038static ssize_t ucma_join_multicast(struct ucma_file *file,
1039 const char __user *inbuf,
1040 int in_len, int out_len)
1041{
1042 struct rdma_ucm_join_mcast cmd;
1043 struct rdma_ucm_create_id_resp resp;
1044 struct ucma_context *ctx;
1045 struct ucma_multicast *mc;
1046 int ret;
1047
1048 if (out_len < sizeof(resp))
1049 return -ENOSPC;
1050
1051 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1052 return -EFAULT;
1053
1054 ctx = ucma_get_ctx(file, cmd.id);
1055 if (IS_ERR(ctx))
1056 return PTR_ERR(ctx);
1057
1058 mutex_lock(&file->mut);
1059 mc = ucma_alloc_multicast(ctx);
6aea938f
JB		 1060 if (!mc) {
1061 ret = -ENOMEM;
c8f6a362
SH		 1062 goto err1;
1063 }
1064
1065 mc->uid = cmd.uid;
1066 memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr);
3f446754 1067 ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc);
c8f6a362
SH		 1068 if (ret)
1069 goto err2;
1070
1071 resp.id = mc->id;
1072 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1073 &resp, sizeof(resp))) {
1074 ret = -EFAULT;
1075 goto err3;
1076 }
1077
1078 mutex_unlock(&file->mut);
1079 ucma_put_ctx(ctx);
1080 return 0;
1081
1082err3:
3f446754 1083 rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr);
c8f6a362
SH		 1084 ucma_cleanup_mc_events(mc);
1085err2:
1086 mutex_lock(&mut);
1087 idr_remove(&multicast_idr, mc->id);
1088 mutex_unlock(&mut);
1089 list_del(&mc->list);
1090 kfree(mc);
1091err1:
1092 mutex_unlock(&file->mut);
1093 ucma_put_ctx(ctx);
1094 return ret;
1095}
1096
1097static ssize_t ucma_leave_multicast(struct ucma_file *file,
1098 const char __user *inbuf,
1099 int in_len, int out_len)
1100{
1101 struct rdma_ucm_destroy_id cmd;
1102 struct rdma_ucm_destroy_id_resp resp;
1103 struct ucma_multicast *mc;
1104 int ret = 0;
1105
1106 if (out_len < sizeof(resp))
1107 return -ENOSPC;
1108
1109 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1110 return -EFAULT;
1111
1112 mutex_lock(&mut);
1113 mc = idr_find(&multicast_idr, cmd.id);
1114 if (!mc)
1115 mc = ERR_PTR(-ENOENT);
1116 else if (mc->ctx->file != file)
1117 mc = ERR_PTR(-EINVAL);
1118 else {
1119 idr_remove(&multicast_idr, mc->id);
1120 atomic_inc(&mc->ctx->ref);
1121 }
1122 mutex_unlock(&mut);
1123
1124 if (IS_ERR(mc)) {
1125 ret = PTR_ERR(mc);
1126 goto out;
1127 }
1128
3f446754 1129 rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr);
c8f6a362
SH		 1130 mutex_lock(&mc->ctx->file->mut);
1131 ucma_cleanup_mc_events(mc);
1132 list_del(&mc->list);
1133 mutex_unlock(&mc->ctx->file->mut);
1134
1135 ucma_put_ctx(mc->ctx);
1136 resp.events_reported = mc->events_reported;
1137 kfree(mc);
1138
1139 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1140 &resp, sizeof(resp)))
1141 ret = -EFAULT;
1142out:
1143 return ret;
1144}
1145
88314e4d
SH		 1146static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2)
1147{
1148 /* Acquire mutex's based on pointer comparison to prevent deadlock. */
1149 if (file1 < file2) {
1150 mutex_lock(&file1->mut);
1151 mutex_lock(&file2->mut);
1152 } else {
1153 mutex_lock(&file2->mut);
1154 mutex_lock(&file1->mut);
1155 }
1156}
1157
1158static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2)
1159{
1160 if (file1 < file2) {
1161 mutex_unlock(&file2->mut);
1162 mutex_unlock(&file1->mut);
1163 } else {
1164 mutex_unlock(&file1->mut);
1165 mutex_unlock(&file2->mut);
1166 }
1167}
1168
1169static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file)
1170{
1171 struct ucma_event *uevent, *tmp;
1172
1173 list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list)
1174 if (uevent->ctx == ctx)
1175 list_move_tail(&uevent->list, &file->event_list);
1176}
1177
1178static ssize_t ucma_migrate_id(struct ucma_file *new_file,
1179 const char __user *inbuf,
1180 int in_len, int out_len)
1181{
1182 struct rdma_ucm_migrate_id cmd;
1183 struct rdma_ucm_migrate_resp resp;
1184 struct ucma_context *ctx;
1185 struct file *filp;
1186 struct ucma_file *cur_file;
1187 int ret = 0;
1188
1189 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1190 return -EFAULT;
1191
1192 /* Get current fd to protect against it being closed */
1193 filp = fget(cmd.fd);
1194 if (!filp)
1195 return -ENOENT;
1196
1197 /* Validate current fd and prevent destruction of id. */
1198 ctx = ucma_get_ctx(filp->private_data, cmd.id);
1199 if (IS_ERR(ctx)) {
1200 ret = PTR_ERR(ctx);
1201 goto file_put;
1202 }
1203
1204 cur_file = ctx->file;
1205 if (cur_file == new_file) {
1206 resp.events_reported = ctx->events_reported;
1207 goto response;
1208 }
1209
1210 /*
1211 * Migrate events between fd's, maintaining order, and avoiding new
1212 * events being added before existing events.
1213 */
1214 ucma_lock_files(cur_file, new_file);
1215 mutex_lock(&mut);
1216
1217 list_move_tail(&ctx->list, &new_file->ctx_list);
1218 ucma_move_events(ctx, new_file);
1219 ctx->file = new_file;
1220 resp.events_reported = ctx->events_reported;
1221
1222 mutex_unlock(&mut);
1223 ucma_unlock_files(cur_file, new_file);
1224
1225response:
1226 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1227 &resp, sizeof(resp)))
1228 ret = -EFAULT;
1229
1230 ucma_put_ctx(ctx);
1231file_put:
1232 fput(filp);
1233 return ret;
1234}
1235
75216638
SH		 1236static ssize_t (*ucma_cmd_table[])(struct ucma_file *file,
1237 const char __user *inbuf,
1238 int in_len, int out_len) = {
1239 [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id,
1240 [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id,
1241 [RDMA_USER_CM_CMD_BIND_ADDR] = ucma_bind_addr,
1242 [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr,
1243 [RDMA_USER_CM_CMD_RESOLVE_ROUTE]= ucma_resolve_route,
1244 [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route,
1245 [RDMA_USER_CM_CMD_CONNECT] = ucma_connect,
1246 [RDMA_USER_CM_CMD_LISTEN] = ucma_listen,
1247 [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept,
1248 [RDMA_USER_CM_CMD_REJECT] = ucma_reject,
1249 [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect,
1250 [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr,
1251 [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event,
1252 [RDMA_USER_CM_CMD_GET_OPTION] = NULL,
7ce86409 1253 [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option,
75216638 1254 [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify,
c8f6a362
SH		 1255 [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast,
1256 [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast,
88314e4d 1257 [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id
75216638
SH		 1258};
1259
1260static ssize_t ucma_write(struct file *filp, const char __user *buf,
1261 size_t len, loff_t *pos)
1262{
1263 struct ucma_file *file = filp->private_data;
1264 struct rdma_ucm_cmd_hdr hdr;
1265 ssize_t ret;
1266
1267 if (len < sizeof(hdr))
1268 return -EINVAL;
1269
1270 if (copy_from_user(&hdr, buf, sizeof(hdr)))
1271 return -EFAULT;
1272
caf6e3f2 1273 if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table))
75216638
SH		 1274 return -EINVAL;
1275
1276 if (hdr.in + sizeof(hdr) > len)
1277 return -EINVAL;
1278
1279 if (!ucma_cmd_table[hdr.cmd])
1280 return -ENOSYS;
1281
1282 ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out);
1283 if (!ret)
1284 ret = len;
1285
1286 return ret;
1287}
1288
1289static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait)
1290{
1291 struct ucma_file *file = filp->private_data;
1292 unsigned int mask = 0;
1293
1294 poll_wait(filp, &file->poll_wait, wait);
1295
1296 if (!list_empty(&file->event_list))
1297 mask = POLLIN | POLLRDNORM;
1298
1299 return mask;
1300}
1301
f7a6117e
RD		 1302/*
1303 * ucma_open() does not need the BKL:
1304 *
1305 * - no global state is referred to;
1306 * - there is no ioctl method to race against;
1307 * - no further module initialization is required for open to work
1308 * after the device is registered.
1309 */
75216638
SH		 1310static int ucma_open(struct inode *inode, struct file *filp)
1311{
1312 struct ucma_file *file;
1313
1314 file = kmalloc(sizeof *file, GFP_KERNEL);
1315 if (!file)
1316 return -ENOMEM;
1317
1318 INIT_LIST_HEAD(&file->event_list);
1319 INIT_LIST_HEAD(&file->ctx_list);
1320 init_waitqueue_head(&file->poll_wait);
1321 mutex_init(&file->mut);
1322
1323 filp->private_data = file;
1324 file->filp = filp;
bc1db9af
RD		 1325
1326 return nonseekable_open(inode, filp);
75216638
SH		 1327}
1328
1329static int ucma_close(struct inode *inode, struct file *filp)
1330{
1331 struct ucma_file *file = filp->private_data;
1332 struct ucma_context *ctx, *tmp;
1333
1334 mutex_lock(&file->mut);
1335 list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) {
1336 mutex_unlock(&file->mut);
1337
1338 mutex_lock(&mut);
1339 idr_remove(&ctx_idr, ctx->id);
1340 mutex_unlock(&mut);
1341
1342 ucma_free_ctx(ctx);
1343 mutex_lock(&file->mut);
1344 }
1345 mutex_unlock(&file->mut);
1346 kfree(file);
1347 return 0;
1348}
1349
2b8693c0 1350static const struct file_operations ucma_fops = {
75216638
SH		 1351 .owner = THIS_MODULE,
1352 .open = ucma_open,
1353 .release = ucma_close,
1354 .write = ucma_write,
1355 .poll = ucma_poll,
bc1db9af 1356 .llseek = no_llseek,
75216638
SH		 1357};
1358
1359static struct miscdevice ucma_misc = {
04ea2f81
RD		 1360 .minor = MISC_DYNAMIC_MINOR,
1361 .name = "rdma_cm",
1362 .nodename = "infiniband/rdma_cm",
1363 .mode = 0666,
1364 .fops = &ucma_fops,
75216638
SH		 1365};
1366
1367static ssize_t show_abi_version(struct device *dev,
1368 struct device_attribute *attr,
1369 char *buf)
1370{
1371 return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION);
1372}
1373static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
1374
1375static int __init ucma_init(void)
1376{
1377 int ret;
1378
1379 ret = misc_register(&ucma_misc);
1380 if (ret)
1381 return ret;
1382
1383 ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version);
1384 if (ret) {
1385 printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n");
97cb7e40
SW		 1386 goto err1;
1387 }
1388
ec8f23ce 1389 ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table);
97cb7e40
SW		 1390 if (!ucma_ctl_table_hdr) {
1391 printk(KERN_ERR "rdma_ucm: couldn't register sysctl paths\n");
1392 ret = -ENOMEM;
1393 goto err2;
75216638
SH		 1394 }
1395 return 0;
97cb7e40
SW		 1396err2:
1397 device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
1398err1:
75216638
SH		 1399 misc_deregister(&ucma_misc);
1400 return ret;
1401}
1402
1403static void __exit ucma_cleanup(void)
1404{
5dd3df10 1405 unregister_net_sysctl_table(ucma_ctl_table_hdr);
75216638
SH		 1406 device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
1407 misc_deregister(&ucma_misc);
1408 idr_destroy(&ctx_idr);
1409}
1410
1411module_init(ucma_init);
1412module_exit(ucma_cleanup);
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