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authorSean Hefty <sean.hefty@intel.com>2006-11-30 19:53:41 -0500
committerRoland Dreier <rolandd@cisco.com>2006-12-12 14:50:22 -0500
commit75216638572f53612304c05a374f0246fe1d16da (patch)
tree25697e2e380f4eda1eccc308ba1bbf4b428714c7
parent628e5f6d39d5a6be96c1272a6709f2dd3ec8b7ce (diff)
RDMA/cma: Export rdma cm interface to userspace
Export the rdma cm interfaces to userspace via a misc device. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat
-rw-r--r--drivers/infiniband/core/Makefile6
-rw-r--r--drivers/infiniband/core/ucma.c874
-rw-r--r--drivers/infiniband/core/uverbs_marshall.c5
-rw-r--r--include/rdma/ib_marshall.h5
-rw-r--r--include/rdma/rdma_user_cm.h206
5 files changed, 1092 insertions, 4 deletions
diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile
index 163d991eb8c9..50fb1cd447b7 100644
--- a/drivers/infiniband/core/Makefile
+++ b/drivers/infiniband/core/Makefile
@@ -1,9 +1,11 @@
1infiniband-$(CONFIG_INFINIBAND_ADDR_TRANS) := ib_addr.o rdma_cm.o 1infiniband-$(CONFIG_INFINIBAND_ADDR_TRANS) := ib_addr.o rdma_cm.o
2user_access-$(CONFIG_INFINIBAND_ADDR_TRANS) := rdma_ucm.o
2 3
3obj-$(CONFIG_INFINIBAND) += ib_core.o ib_mad.o ib_sa.o \ 4obj-$(CONFIG_INFINIBAND) += ib_core.o ib_mad.o ib_sa.o \
4 ib_cm.o iw_cm.o $(infiniband-y) 5 ib_cm.o iw_cm.o $(infiniband-y)
5obj-$(CONFIG_INFINIBAND_USER_MAD) += ib_umad.o 6obj-$(CONFIG_INFINIBAND_USER_MAD) += ib_umad.o
6obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o ib_ucm.o 7obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o ib_ucm.o \
8 $(user_access-y)
7 9
8ib_core-y := packer.o ud_header.o verbs.o sysfs.o \ 10ib_core-y := packer.o ud_header.o verbs.o sysfs.o \
9 device.o fmr_pool.o cache.o 11 device.o fmr_pool.o cache.o
@@ -18,6 +20,8 @@ iw_cm-y := iwcm.o
18 20
19rdma_cm-y := cma.o 21rdma_cm-y := cma.o
20 22
23rdma_ucm-y := ucma.o
24
21ib_addr-y := addr.o 25ib_addr-y := addr.o
22 26
23ib_umad-y := user_mad.o 27ib_umad-y := user_mad.o
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
new file mode 100644
index 000000000000..81a5cdc5733a
--- /dev/null
+++ b/drivers/infiniband/core/ucma.c
@@ -0,0 +1,874 @@
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>
34#include <linux/mutex.h>
35#include <linux/poll.h>
36#include <linux/idr.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/miscdevice.h>
40
41#include <rdma/rdma_user_cm.h>
42#include <rdma/ib_marshall.h>
43#include <rdma/rdma_cm.h>
44
45MODULE_AUTHOR("Sean Hefty");
46MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access");
47MODULE_LICENSE("Dual BSD/GPL");
48
49enum {
50 UCMA_MAX_BACKLOG = 128
51};
52
53struct ucma_file {
54 struct mutex mut;
55 struct file *filp;
56 struct list_head ctx_list;
57 struct list_head event_list;
58 wait_queue_head_t poll_wait;
59};
60
61struct ucma_context {
62 int id;
63 struct completion comp;
64 atomic_t ref;
65 int events_reported;
66 int backlog;
67
68 struct ucma_file *file;
69 struct rdma_cm_id *cm_id;
70 u64 uid;
71
72 struct list_head list;
73};
74
75struct ucma_event {
76 struct ucma_context *ctx;
77 struct list_head list;
78 struct rdma_cm_id *cm_id;
79 struct rdma_ucm_event_resp resp;
80};
81
82static DEFINE_MUTEX(mut);
83static DEFINE_IDR(ctx_idr);
84
85static inline struct ucma_context *_ucma_find_context(int id,
86 struct ucma_file *file)
87{
88 struct ucma_context *ctx;
89
90 ctx = idr_find(&ctx_idr, id);
91 if (!ctx)
92 ctx = ERR_PTR(-ENOENT);
93 else if (ctx->file != file)
94 ctx = ERR_PTR(-EINVAL);
95 return ctx;
96}
97
98static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id)
99{
100 struct ucma_context *ctx;
101
102 mutex_lock(&mut);
103 ctx = _ucma_find_context(id, file);
104 if (!IS_ERR(ctx))
105 atomic_inc(&ctx->ref);
106 mutex_unlock(&mut);
107 return ctx;
108}
109
110static void ucma_put_ctx(struct ucma_context *ctx)
111{
112 if (atomic_dec_and_test(&ctx->ref))
113 complete(&ctx->comp);
114}
115
116static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file)
117{
118 struct ucma_context *ctx;
119 int ret;
120
121 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
122 if (!ctx)
123 return NULL;
124
125 atomic_set(&ctx->ref, 1);
126 init_completion(&ctx->comp);
127 ctx->file = file;
128
129 do {
130 ret = idr_pre_get(&ctx_idr, GFP_KERNEL);
131 if (!ret)
132 goto error;
133
134 mutex_lock(&mut);
135 ret = idr_get_new(&ctx_idr, ctx, &ctx->id);
136 mutex_unlock(&mut);
137 } while (ret == -EAGAIN);
138
139 if (ret)
140 goto error;
141
142 list_add_tail(&ctx->list, &file->ctx_list);
143 return ctx;
144
145error:
146 kfree(ctx);
147 return NULL;
148}
149
150static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst,
151 struct rdma_conn_param *src)
152{
153 if (src->private_data_len)
154 memcpy(dst->private_data, src->private_data,
155 src->private_data_len);
156 dst->private_data_len = src->private_data_len;
157 dst->responder_resources =src->responder_resources;
158 dst->initiator_depth = src->initiator_depth;
159 dst->flow_control = src->flow_control;
160 dst->retry_count = src->retry_count;
161 dst->rnr_retry_count = src->rnr_retry_count;
162 dst->srq = src->srq;
163 dst->qp_num = src->qp_num;
164}
165
166static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst,
167 struct rdma_ud_param *src)
168{
169 if (src->private_data_len)
170 memcpy(dst->private_data, src->private_data,
171 src->private_data_len);
172 dst->private_data_len = src->private_data_len;
173 ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr);
174 dst->qp_num = src->qp_num;
175 dst->qkey = src->qkey;
176}
177
178static void ucma_set_event_context(struct ucma_context *ctx,
179 struct rdma_cm_event *event,
180 struct ucma_event *uevent)
181{
182 uevent->ctx = ctx;
183 uevent->resp.uid = ctx->uid;
184 uevent->resp.id = ctx->id;
185}
186
187static int ucma_event_handler(struct rdma_cm_id *cm_id,
188 struct rdma_cm_event *event)
189{
190 struct ucma_event *uevent;
191 struct ucma_context *ctx = cm_id->context;
192 int ret = 0;
193
194 uevent = kzalloc(sizeof(*uevent), GFP_KERNEL);
195 if (!uevent)
196 return event->event == RDMA_CM_EVENT_CONNECT_REQUEST;
197
198 uevent->cm_id = cm_id;
199 ucma_set_event_context(ctx, event, uevent);
200 uevent->resp.event = event->event;
201 uevent->resp.status = event->status;
202 if (cm_id->ps == RDMA_PS_UDP)
203 ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud);
204 else
205 ucma_copy_conn_event(&uevent->resp.param.conn,
206 &event->param.conn);
207
208 mutex_lock(&ctx->file->mut);
209 if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) {
210 if (!ctx->backlog) {
211 ret = -EDQUOT;
212 goto out;
213 }
214 ctx->backlog--;
215 }
216 list_add_tail(&uevent->list, &ctx->file->event_list);
217 wake_up_interruptible(&ctx->file->poll_wait);
218out:
219 mutex_unlock(&ctx->file->mut);
220 return ret;
221}
222
223static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf,
224 int in_len, int out_len)
225{
226 struct ucma_context *ctx;
227 struct rdma_ucm_get_event cmd;
228 struct ucma_event *uevent;
229 int ret = 0;
230 DEFINE_WAIT(wait);
231
232 if (out_len < sizeof uevent->resp)
233 return -ENOSPC;
234
235 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
236 return -EFAULT;
237
238 mutex_lock(&file->mut);
239 while (list_empty(&file->event_list)) {
240 if (file->filp->f_flags & O_NONBLOCK) {
241 ret = -EAGAIN;
242 break;
243 }
244
245 if (signal_pending(current)) {
246 ret = -ERESTARTSYS;
247 break;
248 }
249
250 prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE);
251 mutex_unlock(&file->mut);
252 schedule();
253 mutex_lock(&file->mut);
254 finish_wait(&file->poll_wait, &wait);
255 }
256
257 if (ret)
258 goto done;
259
260 uevent = list_entry(file->event_list.next, struct ucma_event, list);
261
262 if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) {
263 ctx = ucma_alloc_ctx(file);
264 if (!ctx) {
265 ret = -ENOMEM;
266 goto done;
267 }
268 uevent->ctx->backlog++;
269 ctx->cm_id = uevent->cm_id;
270 ctx->cm_id->context = ctx;
271 uevent->resp.id = ctx->id;
272 }
273
274 if (copy_to_user((void __user *)(unsigned long)cmd.response,
275 &uevent->resp, sizeof uevent->resp)) {
276 ret = -EFAULT;
277 goto done;
278 }
279
280 list_del(&uevent->list);
281 uevent->ctx->events_reported++;
282 kfree(uevent);
283done:
284 mutex_unlock(&file->mut);
285 return ret;
286}
287
288static ssize_t ucma_create_id(struct ucma_file *file,
289 const char __user *inbuf,
290 int in_len, int out_len)
291{
292 struct rdma_ucm_create_id cmd;
293 struct rdma_ucm_create_id_resp resp;
294 struct ucma_context *ctx;
295 int ret;
296
297 if (out_len < sizeof(resp))
298 return -ENOSPC;
299
300 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
301 return -EFAULT;
302
303 mutex_lock(&file->mut);
304 ctx = ucma_alloc_ctx(file);
305 mutex_unlock(&file->mut);
306 if (!ctx)
307 return -ENOMEM;
308
309 ctx->uid = cmd.uid;
310 ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps);
311 if (IS_ERR(ctx->cm_id)) {
312 ret = PTR_ERR(ctx->cm_id);
313 goto err1;
314 }
315
316 resp.id = ctx->id;
317 if (copy_to_user((void __user *)(unsigned long)cmd.response,
318 &resp, sizeof(resp))) {
319 ret = -EFAULT;
320 goto err2;
321 }
322 return 0;
323
324err2:
325 rdma_destroy_id(ctx->cm_id);
326err1:
327 mutex_lock(&mut);
328 idr_remove(&ctx_idr, ctx->id);
329 mutex_unlock(&mut);
330 kfree(ctx);
331 return ret;
332}
333
334static void ucma_cleanup_events(struct ucma_context *ctx)
335{
336 struct ucma_event *uevent, *tmp;
337
338 list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) {
339 if (uevent->ctx != ctx)
340 continue;
341
342 list_del(&uevent->list);
343
344 /* clear incoming connections. */
345 if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST)
346 rdma_destroy_id(uevent->cm_id);
347
348 kfree(uevent);
349 }
350}
351
352static int ucma_free_ctx(struct ucma_context *ctx)
353{
354 int events_reported;
355
356 /* No new events will be generated after destroying the id. */
357 rdma_destroy_id(ctx->cm_id);
358
359 /* Cleanup events not yet reported to the user. */
360 mutex_lock(&ctx->file->mut);
361 ucma_cleanup_events(ctx);
362 list_del(&ctx->list);
363 mutex_unlock(&ctx->file->mut);
364
365 events_reported = ctx->events_reported;
366 kfree(ctx);
367 return events_reported;
368}
369
370static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf,
371 int in_len, int out_len)
372{
373 struct rdma_ucm_destroy_id cmd;
374 struct rdma_ucm_destroy_id_resp resp;
375 struct ucma_context *ctx;
376 int ret = 0;
377
378 if (out_len < sizeof(resp))
379 return -ENOSPC;
380
381 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
382 return -EFAULT;
383
384 mutex_lock(&mut);
385 ctx = _ucma_find_context(cmd.id, file);
386 if (!IS_ERR(ctx))
387 idr_remove(&ctx_idr, ctx->id);
388 mutex_unlock(&mut);
389
390 if (IS_ERR(ctx))
391 return PTR_ERR(ctx);
392
393 ucma_put_ctx(ctx);
394 wait_for_completion(&ctx->comp);
395 resp.events_reported = ucma_free_ctx(ctx);
396
397 if (copy_to_user((void __user *)(unsigned long)cmd.response,
398 &resp, sizeof(resp)))
399 ret = -EFAULT;
400
401 return ret;
402}
403
404static ssize_t ucma_bind_addr(struct ucma_file *file, const char __user *inbuf,
405 int in_len, int out_len)
406{
407 struct rdma_ucm_bind_addr cmd;
408 struct ucma_context *ctx;
409 int ret;
410
411 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
412 return -EFAULT;
413
414 ctx = ucma_get_ctx(file, cmd.id);
415 if (IS_ERR(ctx))
416 return PTR_ERR(ctx);
417
418 ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr);
419 ucma_put_ctx(ctx);
420 return ret;
421}
422
423static ssize_t ucma_resolve_addr(struct ucma_file *file,
424 const char __user *inbuf,
425 int in_len, int out_len)
426{
427 struct rdma_ucm_resolve_addr cmd;
428 struct ucma_context *ctx;
429 int ret;
430
431 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
432 return -EFAULT;
433
434 ctx = ucma_get_ctx(file, cmd.id);
435 if (IS_ERR(ctx))
436 return PTR_ERR(ctx);
437
438 ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr,
439 (struct sockaddr *) &cmd.dst_addr,
440 cmd.timeout_ms);
441 ucma_put_ctx(ctx);
442 return ret;
443}
444
445static ssize_t ucma_resolve_route(struct ucma_file *file,
446 const char __user *inbuf,
447 int in_len, int out_len)
448{
449 struct rdma_ucm_resolve_route cmd;
450 struct ucma_context *ctx;
451 int ret;
452
453 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
454 return -EFAULT;
455
456 ctx = ucma_get_ctx(file, cmd.id);
457 if (IS_ERR(ctx))
458 return PTR_ERR(ctx);
459
460 ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms);
461 ucma_put_ctx(ctx);
462 return ret;
463}
464
465static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp,
466 struct rdma_route *route)
467{
468 struct rdma_dev_addr *dev_addr;
469
470 resp->num_paths = route->num_paths;
471 switch (route->num_paths) {
472 case 0:
473 dev_addr = &route->addr.dev_addr;
474 ib_addr_get_dgid(dev_addr,
475 (union ib_gid *) &resp->ib_route[0].dgid);
476 ib_addr_get_sgid(dev_addr,
477 (union ib_gid *) &resp->ib_route[0].sgid);
478 resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
479 break;
480 case 2:
481 ib_copy_path_rec_to_user(&resp->ib_route[1],
482 &route->path_rec[1]);
483 /* fall through */
484 case 1:
485 ib_copy_path_rec_to_user(&resp->ib_route[0],
486 &route->path_rec[0]);
487 break;
488 default:
489 break;
490 }
491}
492
493static ssize_t ucma_query_route(struct ucma_file *file,
494 const char __user *inbuf,
495 int in_len, int out_len)
496{
497 struct rdma_ucm_query_route cmd;
498 struct rdma_ucm_query_route_resp resp;
499 struct ucma_context *ctx;
500 struct sockaddr *addr;
501 int ret = 0;
502
503 if (out_len < sizeof(resp))
504 return -ENOSPC;
505
506 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
507 return -EFAULT;
508
509 ctx = ucma_get_ctx(file, cmd.id);
510 if (IS_ERR(ctx))
511 return PTR_ERR(ctx);
512
513 memset(&resp, 0, sizeof resp);
514 addr = &ctx->cm_id->route.addr.src_addr;
515 memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ?
516 sizeof(struct sockaddr_in) :
517 sizeof(struct sockaddr_in6));
518 addr = &ctx->cm_id->route.addr.dst_addr;
519 memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ?
520 sizeof(struct sockaddr_in) :
521 sizeof(struct sockaddr_in6));
522 if (!ctx->cm_id->device)
523 goto out;
524
525 resp.node_guid = ctx->cm_id->device->node_guid;
526 resp.port_num = ctx->cm_id->port_num;
527 switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) {
528 case RDMA_TRANSPORT_IB:
529 ucma_copy_ib_route(&resp, &ctx->cm_id->route);
530 break;
531 default:
532 break;
533 }
534
535out:
536 if (copy_to_user((void __user *)(unsigned long)cmd.response,
537 &resp, sizeof(resp)))
538 ret = -EFAULT;
539
540 ucma_put_ctx(ctx);
541 return ret;
542}
543
544static void ucma_copy_conn_param(struct rdma_conn_param *dst,
545 struct rdma_ucm_conn_param *src)
546{
547 dst->private_data = src->private_data;
548 dst->private_data_len = src->private_data_len;
549 dst->responder_resources =src->responder_resources;
550 dst->initiator_depth = src->initiator_depth;
551 dst->flow_control = src->flow_control;
552 dst->retry_count = src->retry_count;
553 dst->rnr_retry_count = src->rnr_retry_count;
554 dst->srq = src->srq;
555 dst->qp_num = src->qp_num;
556}
557
558static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
559 int in_len, int out_len)
560{
561 struct rdma_ucm_connect cmd;
562 struct rdma_conn_param conn_param;
563 struct ucma_context *ctx;
564 int ret;
565
566 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
567 return -EFAULT;
568
569 if (!cmd.conn_param.valid)
570 return -EINVAL;
571
572 ctx = ucma_get_ctx(file, cmd.id);
573 if (IS_ERR(ctx))
574 return PTR_ERR(ctx);
575
576 ucma_copy_conn_param(&conn_param, &cmd.conn_param);
577 ret = rdma_connect(ctx->cm_id, &conn_param);
578 ucma_put_ctx(ctx);
579 return ret;
580}
581
582static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf,
583 int in_len, int out_len)
584{
585 struct rdma_ucm_listen cmd;
586 struct ucma_context *ctx;
587 int ret;
588
589 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
590 return -EFAULT;
591
592 ctx = ucma_get_ctx(file, cmd.id);
593 if (IS_ERR(ctx))
594 return PTR_ERR(ctx);
595
596 ctx->backlog = cmd.backlog > 0 && cmd.backlog < UCMA_MAX_BACKLOG ?
597 cmd.backlog : UCMA_MAX_BACKLOG;
598 ret = rdma_listen(ctx->cm_id, ctx->backlog);
599 ucma_put_ctx(ctx);
600 return ret;
601}
602
603static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf,
604 int in_len, int out_len)
605{
606 struct rdma_ucm_accept cmd;
607 struct rdma_conn_param conn_param;
608 struct ucma_context *ctx;
609 int ret;
610
611 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
612 return -EFAULT;
613
614 ctx = ucma_get_ctx(file, cmd.id);
615 if (IS_ERR(ctx))
616 return PTR_ERR(ctx);
617
618 if (cmd.conn_param.valid) {
619 ctx->uid = cmd.uid;
620 ucma_copy_conn_param(&conn_param, &cmd.conn_param);
621 ret = rdma_accept(ctx->cm_id, &conn_param);
622 } else
623 ret = rdma_accept(ctx->cm_id, NULL);
624
625 ucma_put_ctx(ctx);
626 return ret;
627}
628
629static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf,
630 int in_len, int out_len)
631{
632 struct rdma_ucm_reject cmd;
633 struct ucma_context *ctx;
634 int ret;
635
636 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
637 return -EFAULT;
638
639 ctx = ucma_get_ctx(file, cmd.id);
640 if (IS_ERR(ctx))
641 return PTR_ERR(ctx);
642
643 ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len);
644 ucma_put_ctx(ctx);
645 return ret;
646}
647
648static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf,
649 int in_len, int out_len)
650{
651 struct rdma_ucm_disconnect cmd;
652 struct ucma_context *ctx;
653 int ret;
654
655 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
656 return -EFAULT;
657
658 ctx = ucma_get_ctx(file, cmd.id);
659 if (IS_ERR(ctx))
660 return PTR_ERR(ctx);
661
662 ret = rdma_disconnect(ctx->cm_id);
663 ucma_put_ctx(ctx);
664 return ret;
665}
666
667static ssize_t ucma_init_qp_attr(struct ucma_file *file,
668 const char __user *inbuf,
669 int in_len, int out_len)
670{
671 struct rdma_ucm_init_qp_attr cmd;
672 struct ib_uverbs_qp_attr resp;
673 struct ucma_context *ctx;
674 struct ib_qp_attr qp_attr;
675 int ret;
676
677 if (out_len < sizeof(resp))
678 return -ENOSPC;
679
680 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
681 return -EFAULT;
682
683 ctx = ucma_get_ctx(file, cmd.id);
684 if (IS_ERR(ctx))
685 return PTR_ERR(ctx);
686
687 resp.qp_attr_mask = 0;
688 memset(&qp_attr, 0, sizeof qp_attr);
689 qp_attr.qp_state = cmd.qp_state;
690 ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
691 if (ret)
692 goto out;
693
694 ib_copy_qp_attr_to_user(&resp, &qp_attr);
695 if (copy_to_user((void __user *)(unsigned long)cmd.response,
696 &resp, sizeof(resp)))
697 ret = -EFAULT;
698
699out:
700 ucma_put_ctx(ctx);
701 return ret;
702}
703
704static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf,
705 int in_len, int out_len)
706{
707 struct rdma_ucm_notify cmd;
708 struct ucma_context *ctx;
709 int ret;
710
711 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
712 return -EFAULT;
713
714 ctx = ucma_get_ctx(file, cmd.id);
715 if (IS_ERR(ctx))
716 return PTR_ERR(ctx);
717
718 ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event);
719 ucma_put_ctx(ctx);
720 return ret;
721}
722
723static ssize_t (*ucma_cmd_table[])(struct ucma_file *file,
724 const char __user *inbuf,
725 int in_len, int out_len) = {
726 [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id,
727 [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id,
728 [RDMA_USER_CM_CMD_BIND_ADDR] = ucma_bind_addr,
729 [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr,
730 [RDMA_USER_CM_CMD_RESOLVE_ROUTE]= ucma_resolve_route,
731 [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route,
732 [RDMA_USER_CM_CMD_CONNECT] = ucma_connect,
733 [RDMA_USER_CM_CMD_LISTEN] = ucma_listen,
734 [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept,
735 [RDMA_USER_CM_CMD_REJECT] = ucma_reject,
736 [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect,
737 [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr,
738 [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event,
739 [RDMA_USER_CM_CMD_GET_OPTION] = NULL,
740 [RDMA_USER_CM_CMD_SET_OPTION] = NULL,
741 [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify,
742};
743
744static ssize_t ucma_write(struct file *filp, const char __user *buf,
745 size_t len, loff_t *pos)
746{
747 struct ucma_file *file = filp->private_data;
748 struct rdma_ucm_cmd_hdr hdr;
749 ssize_t ret;
750
751 if (len < sizeof(hdr))
752 return -EINVAL;
753
754 if (copy_from_user(&hdr, buf, sizeof(hdr)))
755 return -EFAULT;
756
757 if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucma_cmd_table))
758 return -EINVAL;
759
760 if (hdr.in + sizeof(hdr) > len)
761 return -EINVAL;
762
763 if (!ucma_cmd_table[hdr.cmd])
764 return -ENOSYS;
765
766 ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out);
767 if (!ret)
768 ret = len;
769
770 return ret;
771}
772
773static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait)
774{
775 struct ucma_file *file = filp->private_data;
776 unsigned int mask = 0;
777
778 poll_wait(filp, &file->poll_wait, wait);
779
780 if (!list_empty(&file->event_list))
781 mask = POLLIN | POLLRDNORM;
782
783 return mask;
784}
785
786static int ucma_open(struct inode *inode, struct file *filp)
787{
788 struct ucma_file *file;
789
790 file = kmalloc(sizeof *file, GFP_KERNEL);
791 if (!file)
792 return -ENOMEM;
793
794 INIT_LIST_HEAD(&file->event_list);
795 INIT_LIST_HEAD(&file->ctx_list);
796 init_waitqueue_head(&file->poll_wait);
797 mutex_init(&file->mut);
798
799 filp->private_data = file;
800 file->filp = filp;
801 return 0;
802}
803
804static int ucma_close(struct inode *inode, struct file *filp)
805{
806 struct ucma_file *file = filp->private_data;
807 struct ucma_context *ctx, *tmp;
808
809 mutex_lock(&file->mut);
810 list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) {
811 mutex_unlock(&file->mut);
812
813 mutex_lock(&mut);
814 idr_remove(&ctx_idr, ctx->id);
815 mutex_unlock(&mut);
816
817 ucma_free_ctx(ctx);
818 mutex_lock(&file->mut);
819 }
820 mutex_unlock(&file->mut);
821 kfree(file);
822 return 0;
823}
824
825static struct file_operations ucma_fops = {
826 .owner = THIS_MODULE,
827 .open = ucma_open,
828 .release = ucma_close,
829 .write = ucma_write,
830 .poll = ucma_poll,
831};
832
833static struct miscdevice ucma_misc = {
834 .minor = MISC_DYNAMIC_MINOR,
835 .name = "rdma_cm",
836 .fops = &ucma_fops,
837};
838
839static ssize_t show_abi_version(struct device *dev,
840 struct device_attribute *attr,
841 char *buf)
842{
843 return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION);
844}
845static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
846
847static int __init ucma_init(void)
848{
849 int ret;
850
851 ret = misc_register(&ucma_misc);
852 if (ret)
853 return ret;
854
855 ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version);
856 if (ret) {
857 printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n");
858 goto err;
859 }
860 return 0;
861err:
862 misc_deregister(&ucma_misc);
863 return ret;
864}
865
866static void __exit ucma_cleanup(void)
867{
868 device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
869 misc_deregister(&ucma_misc);
870 idr_destroy(&ctx_idr);
871}
872
873module_init(ucma_init);
874module_exit(ucma_cleanup);
diff --git a/drivers/infiniband/core/uverbs_marshall.c b/drivers/infiniband/core/uverbs_marshall.c
index ce46b13ae02b..5440da0e59b4 100644
--- a/drivers/infiniband/core/uverbs_marshall.c
+++ b/drivers/infiniband/core/uverbs_marshall.c
@@ -32,8 +32,8 @@
32 32
33#include <rdma/ib_marshall.h> 33#include <rdma/ib_marshall.h>
34 34
35static void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst, 35void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
36 struct ib_ah_attr *src) 36 struct ib_ah_attr *src)
37{ 37{
38 memcpy(dst->grh.dgid, src->grh.dgid.raw, sizeof src->grh.dgid); 38 memcpy(dst->grh.dgid, src->grh.dgid.raw, sizeof src->grh.dgid);
39 dst->grh.flow_label = src->grh.flow_label; 39 dst->grh.flow_label = src->grh.flow_label;
@@ -47,6 +47,7 @@ static void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
47 dst->is_global = src->ah_flags & IB_AH_GRH ? 1 : 0; 47 dst->is_global = src->ah_flags & IB_AH_GRH ? 1 : 0;
48 dst->port_num = src->port_num; 48 dst->port_num = src->port_num;
49} 49}
50EXPORT_SYMBOL(ib_copy_ah_attr_to_user);
50 51
51void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst, 52void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
52 struct ib_qp_attr *src) 53 struct ib_qp_attr *src)
diff --git a/include/rdma/ib_marshall.h b/include/rdma/ib_marshall.h
index 66bf4d7d0dfb..db037205c9e8 100644
--- a/include/rdma/ib_marshall.h
+++ b/include/rdma/ib_marshall.h
@@ -1,5 +1,5 @@
1/* 1/*
2 * Copyright (c) 2005 Intel Corporation. All rights reserved. 2 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
3 * 3 *
4 * This software is available to you under a choice of one of two 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 5 * licenses. You may choose to be licensed under the terms of the GNU
@@ -41,6 +41,9 @@
41void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst, 41void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
42 struct ib_qp_attr *src); 42 struct ib_qp_attr *src);
43 43
44void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
45 struct ib_ah_attr *src);
46
44void ib_copy_path_rec_to_user(struct ib_user_path_rec *dst, 47void ib_copy_path_rec_to_user(struct ib_user_path_rec *dst,
45 struct ib_sa_path_rec *src); 48 struct ib_sa_path_rec *src);
46 49
diff --git a/include/rdma/rdma_user_cm.h b/include/rdma/rdma_user_cm.h
new file mode 100644
index 000000000000..9572ab8eeac1
--- /dev/null
+++ b/include/rdma/rdma_user_cm.h
@@ -0,0 +1,206 @@
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#ifndef RDMA_USER_CM_H
34#define RDMA_USER_CM_H
35
36#include <linux/types.h>
37#include <linux/in6.h>
38#include <rdma/ib_user_verbs.h>
39#include <rdma/ib_user_sa.h>
40
41#define RDMA_USER_CM_ABI_VERSION 3
42
43#define RDMA_MAX_PRIVATE_DATA 256
44
45enum {
46 RDMA_USER_CM_CMD_CREATE_ID,
47 RDMA_USER_CM_CMD_DESTROY_ID,
48 RDMA_USER_CM_CMD_BIND_ADDR,
49 RDMA_USER_CM_CMD_RESOLVE_ADDR,
50 RDMA_USER_CM_CMD_RESOLVE_ROUTE,
51 RDMA_USER_CM_CMD_QUERY_ROUTE,
52 RDMA_USER_CM_CMD_CONNECT,
53 RDMA_USER_CM_CMD_LISTEN,
54 RDMA_USER_CM_CMD_ACCEPT,
55 RDMA_USER_CM_CMD_REJECT,
56 RDMA_USER_CM_CMD_DISCONNECT,
57 RDMA_USER_CM_CMD_INIT_QP_ATTR,
58 RDMA_USER_CM_CMD_GET_EVENT,
59 RDMA_USER_CM_CMD_GET_OPTION,
60 RDMA_USER_CM_CMD_SET_OPTION,
61 RDMA_USER_CM_CMD_NOTIFY
62};
63
64/*
65 * command ABI structures.
66 */
67struct rdma_ucm_cmd_hdr {
68 __u32 cmd;
69 __u16 in;
70 __u16 out;
71};
72
73struct rdma_ucm_create_id {
74 __u64 uid;
75 __u64 response;
76 __u16 ps;
77 __u8 reserved[6];
78};
79
80struct rdma_ucm_create_id_resp {
81 __u32 id;
82};
83
84struct rdma_ucm_destroy_id {
85 __u64 response;
86 __u32 id;
87 __u32 reserved;
88};
89
90struct rdma_ucm_destroy_id_resp {
91 __u32 events_reported;
92};
93
94struct rdma_ucm_bind_addr {
95 __u64 response;
96 struct sockaddr_in6 addr;
97 __u32 id;
98};
99
100struct rdma_ucm_resolve_addr {
101 struct sockaddr_in6 src_addr;
102 struct sockaddr_in6 dst_addr;
103 __u32 id;
104 __u32 timeout_ms;
105};
106
107struct rdma_ucm_resolve_route {
108 __u32 id;
109 __u32 timeout_ms;
110};
111
112struct rdma_ucm_query_route {
113 __u64 response;
114 __u32 id;
115 __u32 reserved;
116};
117
118struct rdma_ucm_query_route_resp {
119 __u64 node_guid;
120 struct ib_user_path_rec ib_route[2];
121 struct sockaddr_in6 src_addr;
122 struct sockaddr_in6 dst_addr;
123 __u32 num_paths;
124 __u8 port_num;
125 __u8 reserved[3];
126};
127
128struct rdma_ucm_conn_param {
129 __u32 qp_num;
130 __u32 reserved;
131 __u8 private_data[RDMA_MAX_PRIVATE_DATA];
132 __u8 private_data_len;
133 __u8 srq;
134 __u8 responder_resources;
135 __u8 initiator_depth;
136 __u8 flow_control;
137 __u8 retry_count;
138 __u8 rnr_retry_count;
139 __u8 valid;
140};
141
142struct rdma_ucm_ud_param {
143 __u32 qp_num;
144 __u32 qkey;
145 struct ib_uverbs_ah_attr ah_attr;
146 __u8 private_data[RDMA_MAX_PRIVATE_DATA];
147 __u8 private_data_len;
148 __u8 reserved[7];
149};
150
151struct rdma_ucm_connect {
152 struct rdma_ucm_conn_param conn_param;
153 __u32 id;
154 __u32 reserved;
155};
156
157struct rdma_ucm_listen {
158 __u32 id;
159 __u32 backlog;
160};
161
162struct rdma_ucm_accept {
163 __u64 uid;
164 struct rdma_ucm_conn_param conn_param;
165 __u32 id;
166 __u32 reserved;
167};
168
169struct rdma_ucm_reject {
170 __u32 id;
171 __u8 private_data_len;
172 __u8 reserved[3];
173 __u8 private_data[RDMA_MAX_PRIVATE_DATA];
174};
175
176struct rdma_ucm_disconnect {
177 __u32 id;
178};
179
180struct rdma_ucm_init_qp_attr {
181 __u64 response;
182 __u32 id;
183 __u32 qp_state;
184};
185
186struct rdma_ucm_notify {
187 __u32 id;
188 __u32 event;
189};
190
191struct rdma_ucm_get_event {
192 __u64 response;
193};
194
195struct rdma_ucm_event_resp {
196 __u64 uid;
197 __u32 id;
198 __u32 event;
199 __u32 status;
200 union {
201 struct rdma_ucm_conn_param conn;
202 struct rdma_ucm_ud_param ud;
203 } param;
204};
205
206#endif /* RDMA_USER_CM_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 22:48:57 -0500