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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> |
95893dde | 45 | #include <linux/nsproxy.h> |
75216638 | 46 | |
a3671a4f GS |
47 | #include <linux/nospec.h> |
48 | ||
75216638 SH |
49 | #include <rdma/rdma_user_cm.h> |
50 | #include <rdma/ib_marshall.h> | |
51 | #include <rdma/rdma_cm.h> | |
a7ca1f00 | 52 | #include <rdma/rdma_cm_ib.h> |
ee7aed45 | 53 | #include <rdma/ib_addr.h> |
edaa7a55 | 54 | #include <rdma/ib.h> |
8094ba0a | 55 | #include <rdma/ib_cm.h> |
8f71bb00 JG |
56 | #include <rdma/rdma_netlink.h> |
57 | #include "core_priv.h" | |
75216638 SH |
58 | |
59 | MODULE_AUTHOR("Sean Hefty"); | |
60 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); | |
61 | MODULE_LICENSE("Dual BSD/GPL"); | |
62 | ||
97cb7e40 SW |
63 | static unsigned int max_backlog = 1024; |
64 | ||
65 | static struct ctl_table_header *ucma_ctl_table_hdr; | |
f3a5e3e3 | 66 | static struct ctl_table ucma_ctl_table[] = { |
97cb7e40 SW |
67 | { |
68 | .procname = "max_backlog", | |
69 | .data = &max_backlog, | |
70 | .maxlen = sizeof max_backlog, | |
71 | .mode = 0644, | |
72 | .proc_handler = proc_dointvec, | |
73 | }, | |
74 | { } | |
75 | }; | |
76 | ||
75216638 SH |
77 | struct ucma_file { |
78 | struct mutex mut; | |
79 | struct file *filp; | |
80 | struct list_head ctx_list; | |
81 | struct list_head event_list; | |
82 | wait_queue_head_t poll_wait; | |
e1c30298 | 83 | struct workqueue_struct *close_wq; |
75216638 SH |
84 | }; |
85 | ||
86 | struct ucma_context { | |
afcafe07 | 87 | u32 id; |
75216638 | 88 | struct completion comp; |
167b95ec | 89 | refcount_t ref; |
75216638 | 90 | int events_reported; |
26c15dec | 91 | atomic_t backlog; |
75216638 SH |
92 | |
93 | struct ucma_file *file; | |
94 | struct rdma_cm_id *cm_id; | |
7c119107 | 95 | struct mutex mutex; |
75216638 SH |
96 | u64 uid; |
97 | ||
98 | struct list_head list; | |
e1c30298 | 99 | /* mark that device is in process of destroying the internal HW |
afcafe07 | 100 | * resources, protected by the ctx_table lock |
e1c30298 YH |
101 | */ |
102 | int closing; | |
103 | /* sync between removal event and id destroy, protected by file mut */ | |
104 | int destroying; | |
105 | struct work_struct close_work; | |
c8f6a362 SH |
106 | }; |
107 | ||
108 | struct ucma_multicast { | |
109 | struct ucma_context *ctx; | |
4dfd5321 | 110 | u32 id; |
c8f6a362 SH |
111 | int events_reported; |
112 | ||
113 | u64 uid; | |
ab15c95a | 114 | u8 join_state; |
3f446754 | 115 | struct sockaddr_storage addr; |
75216638 SH |
116 | }; |
117 | ||
118 | struct ucma_event { | |
119 | struct ucma_context *ctx; | |
c8f6a362 | 120 | struct ucma_multicast *mc; |
75216638 SH |
121 | struct list_head list; |
122 | struct rdma_cm_id *cm_id; | |
123 | struct rdma_ucm_event_resp resp; | |
e1c30298 | 124 | struct work_struct close_work; |
75216638 SH |
125 | }; |
126 | ||
afcafe07 | 127 | static DEFINE_XARRAY_ALLOC(ctx_table); |
4dfd5321 | 128 | static DEFINE_XARRAY_ALLOC(multicast_table); |
75216638 | 129 | |
0d23ba60 | 130 | static const struct file_operations ucma_fops; |
620db1a1 | 131 | static int __destroy_id(struct ucma_context *ctx); |
0d23ba60 | 132 | |
75216638 SH |
133 | static inline struct ucma_context *_ucma_find_context(int id, |
134 | struct ucma_file *file) | |
135 | { | |
136 | struct ucma_context *ctx; | |
137 | ||
afcafe07 | 138 | ctx = xa_load(&ctx_table, id); |
75216638 SH |
139 | if (!ctx) |
140 | ctx = ERR_PTR(-ENOENT); | |
620db1a1 | 141 | else if (ctx->file != file) |
75216638 SH |
142 | ctx = ERR_PTR(-EINVAL); |
143 | return ctx; | |
144 | } | |
145 | ||
146 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
147 | { | |
148 | struct ucma_context *ctx; | |
149 | ||
afcafe07 | 150 | xa_lock(&ctx_table); |
75216638 | 151 | ctx = _ucma_find_context(id, file); |
e1c30298 YH |
152 | if (!IS_ERR(ctx)) { |
153 | if (ctx->closing) | |
154 | ctx = ERR_PTR(-EIO); | |
ca2968c1 JG |
155 | else if (!refcount_inc_not_zero(&ctx->ref)) |
156 | ctx = ERR_PTR(-ENXIO); | |
e1c30298 | 157 | } |
afcafe07 | 158 | xa_unlock(&ctx_table); |
75216638 SH |
159 | return ctx; |
160 | } | |
161 | ||
162 | static void ucma_put_ctx(struct ucma_context *ctx) | |
163 | { | |
167b95ec | 164 | if (refcount_dec_and_test(&ctx->ref)) |
75216638 SH |
165 | complete(&ctx->comp); |
166 | } | |
167 | ||
8b77586b JG |
168 | /* |
169 | * Same as ucm_get_ctx but requires that ->cm_id->device is valid, eg that the | |
170 | * CM_ID is bound. | |
171 | */ | |
172 | static struct ucma_context *ucma_get_ctx_dev(struct ucma_file *file, int id) | |
173 | { | |
174 | struct ucma_context *ctx = ucma_get_ctx(file, id); | |
175 | ||
176 | if (IS_ERR(ctx)) | |
177 | return ctx; | |
178 | if (!ctx->cm_id->device) { | |
179 | ucma_put_ctx(ctx); | |
180 | return ERR_PTR(-EINVAL); | |
181 | } | |
182 | return ctx; | |
183 | } | |
184 | ||
e1c30298 YH |
185 | static void ucma_close_event_id(struct work_struct *work) |
186 | { | |
187 | struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work); | |
188 | ||
189 | rdma_destroy_id(uevent_close->cm_id); | |
190 | kfree(uevent_close); | |
191 | } | |
192 | ||
193 | static void ucma_close_id(struct work_struct *work) | |
194 | { | |
195 | struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); | |
196 | ||
197 | /* once all inflight tasks are finished, we close all underlying | |
198 | * resources. The context is still alive till its explicit destryoing | |
199 | * by its creator. | |
200 | */ | |
201 | ucma_put_ctx(ctx); | |
202 | wait_for_completion(&ctx->comp); | |
203 | /* No new events will be generated after destroying the id. */ | |
204 | rdma_destroy_id(ctx->cm_id); | |
205 | } | |
206 | ||
75216638 SH |
207 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
208 | { | |
209 | struct ucma_context *ctx; | |
75216638 SH |
210 | |
211 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
212 | if (!ctx) | |
213 | return NULL; | |
214 | ||
e1c30298 | 215 | INIT_WORK(&ctx->close_work, ucma_close_id); |
167b95ec | 216 | refcount_set(&ctx->ref, 1); |
75216638 | 217 | init_completion(&ctx->comp); |
620db1a1 JG |
218 | /* So list_del() will work if we don't do ucma_finish_ctx() */ |
219 | INIT_LIST_HEAD(&ctx->list); | |
75216638 | 220 | ctx->file = file; |
7c119107 | 221 | mutex_init(&ctx->mutex); |
75216638 | 222 | |
620db1a1 JG |
223 | if (xa_alloc(&ctx_table, &ctx->id, NULL, xa_limit_32b, GFP_KERNEL)) { |
224 | kfree(ctx); | |
225 | return NULL; | |
226 | } | |
75216638 | 227 | return ctx; |
620db1a1 | 228 | } |
75216638 | 229 | |
620db1a1 JG |
230 | static void ucma_finish_ctx(struct ucma_context *ctx) |
231 | { | |
232 | lockdep_assert_held(&ctx->file->mut); | |
233 | list_add_tail(&ctx->list, &ctx->file->ctx_list); | |
234 | xa_store(&ctx_table, ctx->id, ctx, GFP_KERNEL); | |
75216638 SH |
235 | } |
236 | ||
237 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, | |
238 | struct rdma_conn_param *src) | |
239 | { | |
240 | if (src->private_data_len) | |
241 | memcpy(dst->private_data, src->private_data, | |
242 | src->private_data_len); | |
243 | dst->private_data_len = src->private_data_len; | |
244 | dst->responder_resources =src->responder_resources; | |
245 | dst->initiator_depth = src->initiator_depth; | |
246 | dst->flow_control = src->flow_control; | |
247 | dst->retry_count = src->retry_count; | |
248 | dst->rnr_retry_count = src->rnr_retry_count; | |
249 | dst->srq = src->srq; | |
250 | dst->qp_num = src->qp_num; | |
251 | } | |
252 | ||
d541e455 DC |
253 | static void ucma_copy_ud_event(struct ib_device *device, |
254 | struct rdma_ucm_ud_param *dst, | |
75216638 SH |
255 | struct rdma_ud_param *src) |
256 | { | |
257 | if (src->private_data_len) | |
258 | memcpy(dst->private_data, src->private_data, | |
259 | src->private_data_len); | |
260 | dst->private_data_len = src->private_data_len; | |
d541e455 | 261 | ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr); |
75216638 SH |
262 | dst->qp_num = src->qp_num; |
263 | dst->qkey = src->qkey; | |
264 | } | |
265 | ||
266 | static void ucma_set_event_context(struct ucma_context *ctx, | |
267 | struct rdma_cm_event *event, | |
268 | struct ucma_event *uevent) | |
269 | { | |
270 | uevent->ctx = ctx; | |
c8f6a362 SH |
271 | switch (event->event) { |
272 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
273 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
274 | uevent->mc = (struct ucma_multicast *) | |
275 | event->param.ud.private_data; | |
276 | uevent->resp.uid = uevent->mc->uid; | |
277 | uevent->resp.id = uevent->mc->id; | |
278 | break; | |
279 | default: | |
280 | uevent->resp.uid = ctx->uid; | |
281 | uevent->resp.id = ctx->id; | |
282 | break; | |
283 | } | |
75216638 SH |
284 | } |
285 | ||
e1c30298 YH |
286 | /* Called with file->mut locked for the relevant context. */ |
287 | static void ucma_removal_event_handler(struct rdma_cm_id *cm_id) | |
288 | { | |
289 | struct ucma_context *ctx = cm_id->context; | |
290 | struct ucma_event *con_req_eve; | |
291 | int event_found = 0; | |
292 | ||
293 | if (ctx->destroying) | |
294 | return; | |
295 | ||
296 | /* only if context is pointing to cm_id that it owns it and can be | |
297 | * queued to be closed, otherwise that cm_id is an inflight one that | |
298 | * is part of that context event list pending to be detached and | |
299 | * reattached to its new context as part of ucma_get_event, | |
300 | * handled separately below. | |
301 | */ | |
302 | if (ctx->cm_id == cm_id) { | |
afcafe07 | 303 | xa_lock(&ctx_table); |
e1c30298 | 304 | ctx->closing = 1; |
afcafe07 | 305 | xa_unlock(&ctx_table); |
e1c30298 YH |
306 | queue_work(ctx->file->close_wq, &ctx->close_work); |
307 | return; | |
308 | } | |
309 | ||
310 | list_for_each_entry(con_req_eve, &ctx->file->event_list, list) { | |
311 | if (con_req_eve->cm_id == cm_id && | |
312 | con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
313 | list_del(&con_req_eve->list); | |
314 | INIT_WORK(&con_req_eve->close_work, ucma_close_event_id); | |
315 | queue_work(ctx->file->close_wq, &con_req_eve->close_work); | |
316 | event_found = 1; | |
317 | break; | |
318 | } | |
319 | } | |
320 | if (!event_found) | |
aba25a3e | 321 | pr_err("ucma_removal_event_handler: warning: connect request event wasn't found\n"); |
e1c30298 YH |
322 | } |
323 | ||
75216638 SH |
324 | static int ucma_event_handler(struct rdma_cm_id *cm_id, |
325 | struct rdma_cm_event *event) | |
326 | { | |
327 | struct ucma_event *uevent; | |
328 | struct ucma_context *ctx = cm_id->context; | |
329 | int ret = 0; | |
330 | ||
331 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
332 | if (!uevent) | |
333 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
334 | ||
418edaab | 335 | mutex_lock(&ctx->file->mut); |
75216638 SH |
336 | uevent->cm_id = cm_id; |
337 | ucma_set_event_context(ctx, event, uevent); | |
338 | uevent->resp.event = event->event; | |
339 | uevent->resp.status = event->status; | |
638ef7a6 | 340 | if (cm_id->qp_type == IB_QPT_UD) |
d541e455 DC |
341 | ucma_copy_ud_event(cm_id->device, &uevent->resp.param.ud, |
342 | &event->param.ud); | |
75216638 SH |
343 | else |
344 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
345 | &event->param.conn); | |
346 | ||
93531ee7 LR |
347 | uevent->resp.ece.vendor_id = event->ece.vendor_id; |
348 | uevent->resp.ece.attr_mod = event->ece.attr_mod; | |
349 | ||
75216638 | 350 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
26c15dec | 351 | if (!atomic_add_unless(&ctx->backlog, -1, 0)) { |
3492856e | 352 | ret = -ENOMEM; |
30a5ec98 | 353 | kfree(uevent); |
75216638 SH |
354 | goto out; |
355 | } | |
c6b21824 | 356 | } else if (!ctx->uid || ctx->cm_id != cm_id) { |
0cefcf0b SH |
357 | /* |
358 | * We ignore events for new connections until userspace has set | |
359 | * their context. This can only happen if an error occurs on a | |
360 | * new connection before the user accepts it. This is okay, | |
e1c30298 YH |
361 | * since the accept will just fail later. However, we do need |
362 | * to release the underlying HW resources in case of a device | |
363 | * removal event. | |
0cefcf0b | 364 | */ |
e1c30298 YH |
365 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
366 | ucma_removal_event_handler(cm_id); | |
367 | ||
0cefcf0b SH |
368 | kfree(uevent); |
369 | goto out; | |
75216638 | 370 | } |
0cefcf0b | 371 | |
75216638 SH |
372 | list_add_tail(&uevent->list, &ctx->file->event_list); |
373 | wake_up_interruptible(&ctx->file->poll_wait); | |
e1c30298 YH |
374 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
375 | ucma_removal_event_handler(cm_id); | |
75216638 SH |
376 | out: |
377 | mutex_unlock(&ctx->file->mut); | |
378 | return ret; | |
379 | } | |
380 | ||
381 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
382 | int in_len, int out_len) | |
383 | { | |
620db1a1 | 384 | struct ucma_context *ctx = NULL; |
75216638 SH |
385 | struct rdma_ucm_get_event cmd; |
386 | struct ucma_event *uevent; | |
387 | int ret = 0; | |
75216638 | 388 | |
611cb92b JG |
389 | /* |
390 | * Old 32 bit user space does not send the 4 byte padding in the | |
391 | * reserved field. We don't care, allow it to keep working. | |
392 | */ | |
93531ee7 LR |
393 | if (out_len < sizeof(uevent->resp) - sizeof(uevent->resp.reserved) - |
394 | sizeof(uevent->resp.ece)) | |
75216638 SH |
395 | return -ENOSPC; |
396 | ||
397 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
398 | return -EFAULT; | |
399 | ||
400 | mutex_lock(&file->mut); | |
401 | while (list_empty(&file->event_list)) { | |
d92f7644 | 402 | mutex_unlock(&file->mut); |
75216638 | 403 | |
d92f7644 SH |
404 | if (file->filp->f_flags & O_NONBLOCK) |
405 | return -EAGAIN; | |
406 | ||
407 | if (wait_event_interruptible(file->poll_wait, | |
408 | !list_empty(&file->event_list))) | |
409 | return -ERESTARTSYS; | |
75216638 | 410 | |
75216638 | 411 | mutex_lock(&file->mut); |
75216638 SH |
412 | } |
413 | ||
620db1a1 | 414 | uevent = list_first_entry(&file->event_list, struct ucma_event, list); |
75216638 SH |
415 | |
416 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
417 | ctx = ucma_alloc_ctx(file); | |
418 | if (!ctx) { | |
419 | ret = -ENOMEM; | |
620db1a1 | 420 | goto err_unlock; |
75216638 | 421 | } |
75216638 | 422 | uevent->resp.id = ctx->id; |
620db1a1 | 423 | ctx->cm_id = uevent->cm_id; |
75216638 SH |
424 | } |
425 | ||
6f57c933 | 426 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
611cb92b JG |
427 | &uevent->resp, |
428 | min_t(size_t, out_len, sizeof(uevent->resp)))) { | |
75216638 | 429 | ret = -EFAULT; |
620db1a1 JG |
430 | goto err_ctx; |
431 | } | |
432 | ||
433 | if (ctx) { | |
26c15dec | 434 | atomic_inc(&uevent->ctx->backlog); |
620db1a1 JG |
435 | uevent->cm_id->context = ctx; |
436 | ucma_finish_ctx(ctx); | |
75216638 SH |
437 | } |
438 | ||
439 | list_del(&uevent->list); | |
440 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
441 | if (uevent->mc) |
442 | uevent->mc->events_reported++; | |
620db1a1 JG |
443 | mutex_unlock(&file->mut); |
444 | ||
75216638 | 445 | kfree(uevent); |
620db1a1 JG |
446 | return 0; |
447 | ||
448 | err_ctx: | |
449 | if (ctx) { | |
450 | xa_erase(&ctx_table, ctx->id); | |
451 | kfree(ctx); | |
452 | } | |
453 | err_unlock: | |
75216638 SH |
454 | mutex_unlock(&file->mut); |
455 | return ret; | |
456 | } | |
457 | ||
b26f9b99 SH |
458 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
459 | { | |
460 | switch (cmd->ps) { | |
461 | case RDMA_PS_TCP: | |
462 | *qp_type = IB_QPT_RC; | |
463 | return 0; | |
464 | case RDMA_PS_UDP: | |
465 | case RDMA_PS_IPOIB: | |
466 | *qp_type = IB_QPT_UD; | |
467 | return 0; | |
638ef7a6 SH |
468 | case RDMA_PS_IB: |
469 | *qp_type = cmd->qp_type; | |
470 | return 0; | |
b26f9b99 SH |
471 | default: |
472 | return -EINVAL; | |
473 | } | |
474 | } | |
475 | ||
476 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
477 | int in_len, int out_len) | |
75216638 SH |
478 | { |
479 | struct rdma_ucm_create_id cmd; | |
480 | struct rdma_ucm_create_id_resp resp; | |
481 | struct ucma_context *ctx; | |
e8980d67 | 482 | struct rdma_cm_id *cm_id; |
b26f9b99 | 483 | enum ib_qp_type qp_type; |
75216638 SH |
484 | int ret; |
485 | ||
486 | if (out_len < sizeof(resp)) | |
487 | return -ENOSPC; | |
488 | ||
489 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
490 | return -EFAULT; | |
491 | ||
b26f9b99 SH |
492 | ret = ucma_get_qp_type(&cmd, &qp_type); |
493 | if (ret) | |
494 | return ret; | |
495 | ||
75216638 | 496 | ctx = ucma_alloc_ctx(file); |
75216638 SH |
497 | if (!ctx) |
498 | return -ENOMEM; | |
499 | ||
500 | ctx->uid = cmd.uid; | |
19fd08b8 LT |
501 | cm_id = __rdma_create_id(current->nsproxy->net_ns, |
502 | ucma_event_handler, ctx, cmd.ps, qp_type, NULL); | |
e8980d67 LR |
503 | if (IS_ERR(cm_id)) { |
504 | ret = PTR_ERR(cm_id); | |
75216638 SH |
505 | goto err1; |
506 | } | |
620db1a1 | 507 | ctx->cm_id = cm_id; |
75216638 SH |
508 | |
509 | resp.id = ctx->id; | |
6f57c933 | 510 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 | 511 | &resp, sizeof(resp))) { |
620db1a1 JG |
512 | xa_erase(&ctx_table, ctx->id); |
513 | __destroy_id(ctx); | |
514 | return -EFAULT; | |
75216638 | 515 | } |
e8980d67 | 516 | |
620db1a1 JG |
517 | mutex_lock(&file->mut); |
518 | ucma_finish_ctx(ctx); | |
519 | mutex_unlock(&file->mut); | |
75216638 SH |
520 | return 0; |
521 | ||
75216638 | 522 | err1: |
afcafe07 | 523 | xa_erase(&ctx_table, ctx->id); |
75216638 SH |
524 | kfree(ctx); |
525 | return ret; | |
526 | } | |
527 | ||
c8f6a362 SH |
528 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
529 | { | |
95fe5109 JG |
530 | struct ucma_multicast *mc; |
531 | unsigned long index; | |
c8f6a362 | 532 | |
95fe5109 JG |
533 | xa_for_each(&multicast_table, index, mc) { |
534 | if (mc->ctx != ctx) | |
535 | continue; | |
536 | /* | |
537 | * At this point mc->ctx->ref is 0 so the mc cannot leave the | |
538 | * lock on the reader and this is enough serialization | |
539 | */ | |
540 | xa_erase(&multicast_table, index); | |
c8f6a362 SH |
541 | kfree(mc); |
542 | } | |
c8f6a362 SH |
543 | } |
544 | ||
c8f6a362 SH |
545 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
546 | { | |
547 | struct ucma_event *uevent, *tmp; | |
548 | ||
09e328e4 | 549 | rdma_lock_handler(mc->ctx->cm_id); |
95fe5109 | 550 | mutex_lock(&mc->ctx->file->mut); |
c8f6a362 SH |
551 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { |
552 | if (uevent->mc != mc) | |
553 | continue; | |
554 | ||
555 | list_del(&uevent->list); | |
556 | kfree(uevent); | |
557 | } | |
95fe5109 | 558 | mutex_unlock(&mc->ctx->file->mut); |
09e328e4 | 559 | rdma_unlock_handler(mc->ctx->cm_id); |
c8f6a362 SH |
560 | } |
561 | ||
186834b5 | 562 | /* |
e1c30298 YH |
563 | * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At |
564 | * this point, no new events will be reported from the hardware. However, we | |
565 | * still need to cleanup the UCMA context for this ID. Specifically, there | |
566 | * might be events that have not yet been consumed by the user space software. | |
567 | * These might include pending connect requests which we have not completed | |
568 | * processing. We cannot call rdma_destroy_id while holding the lock of the | |
569 | * context (file->mut), as it might cause a deadlock. We therefore extract all | |
570 | * relevant events from the context pending events list while holding the | |
571 | * mutex. After that we release them as needed. | |
186834b5 | 572 | */ |
75216638 SH |
573 | static int ucma_free_ctx(struct ucma_context *ctx) |
574 | { | |
575 | int events_reported; | |
186834b5 HS |
576 | struct ucma_event *uevent, *tmp; |
577 | LIST_HEAD(list); | |
75216638 | 578 | |
75216638 | 579 | |
c8f6a362 SH |
580 | ucma_cleanup_multicast(ctx); |
581 | ||
75216638 SH |
582 | /* Cleanup events not yet reported to the user. */ |
583 | mutex_lock(&ctx->file->mut); | |
186834b5 HS |
584 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
585 | if (uevent->ctx == ctx) | |
586 | list_move_tail(&uevent->list, &list); | |
587 | } | |
75216638 | 588 | list_del(&ctx->list); |
98837c6c | 589 | events_reported = ctx->events_reported; |
75216638 SH |
590 | mutex_unlock(&ctx->file->mut); |
591 | ||
186834b5 HS |
592 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
593 | list_del(&uevent->list); | |
594 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
595 | rdma_destroy_id(uevent->cm_id); | |
596 | kfree(uevent); | |
597 | } | |
598 | ||
7c119107 | 599 | mutex_destroy(&ctx->mutex); |
75216638 SH |
600 | kfree(ctx); |
601 | return events_reported; | |
602 | } | |
603 | ||
c07e12d8 JG |
604 | static int __destroy_id(struct ucma_context *ctx) |
605 | { | |
308571de JG |
606 | /* |
607 | * If the refcount is already 0 then ucma_close_id() has already | |
608 | * destroyed the cm_id, otherwise holding the refcount keeps cm_id | |
609 | * valid. Prevent queue_work() from being called. | |
610 | */ | |
611 | if (refcount_inc_not_zero(&ctx->ref)) { | |
612 | rdma_lock_handler(ctx->cm_id); | |
613 | ctx->destroying = 1; | |
614 | rdma_unlock_handler(ctx->cm_id); | |
615 | ucma_put_ctx(ctx); | |
616 | } | |
c07e12d8 JG |
617 | |
618 | flush_workqueue(ctx->file->close_wq); | |
619 | /* At this point it's guaranteed that there is no inflight closing task */ | |
620 | xa_lock(&ctx_table); | |
621 | if (!ctx->closing) { | |
622 | xa_unlock(&ctx_table); | |
623 | ucma_put_ctx(ctx); | |
624 | wait_for_completion(&ctx->comp); | |
625 | rdma_destroy_id(ctx->cm_id); | |
626 | } else { | |
627 | xa_unlock(&ctx_table); | |
628 | } | |
629 | return ucma_free_ctx(ctx); | |
630 | } | |
631 | ||
75216638 SH |
632 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, |
633 | int in_len, int out_len) | |
634 | { | |
635 | struct rdma_ucm_destroy_id cmd; | |
636 | struct rdma_ucm_destroy_id_resp resp; | |
637 | struct ucma_context *ctx; | |
638 | int ret = 0; | |
639 | ||
640 | if (out_len < sizeof(resp)) | |
641 | return -ENOSPC; | |
642 | ||
643 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
644 | return -EFAULT; | |
645 | ||
afcafe07 | 646 | xa_lock(&ctx_table); |
75216638 SH |
647 | ctx = _ucma_find_context(cmd.id, file); |
648 | if (!IS_ERR(ctx)) | |
afcafe07 MW |
649 | __xa_erase(&ctx_table, ctx->id); |
650 | xa_unlock(&ctx_table); | |
75216638 SH |
651 | |
652 | if (IS_ERR(ctx)) | |
653 | return PTR_ERR(ctx); | |
654 | ||
c07e12d8 | 655 | resp.events_reported = __destroy_id(ctx); |
6f57c933 | 656 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
657 | &resp, sizeof(resp))) |
658 | ret = -EFAULT; | |
659 | ||
660 | return ret; | |
661 | } | |
662 | ||
05ad9457 | 663 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
75216638 SH |
664 | int in_len, int out_len) |
665 | { | |
05ad9457 | 666 | struct rdma_ucm_bind_ip cmd; |
75216638 SH |
667 | struct ucma_context *ctx; |
668 | int ret; | |
669 | ||
670 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
671 | return -EFAULT; | |
672 | ||
84652aef RD |
673 | if (!rdma_addr_size_in6(&cmd.addr)) |
674 | return -EINVAL; | |
675 | ||
75216638 SH |
676 | ctx = ucma_get_ctx(file, cmd.id); |
677 | if (IS_ERR(ctx)) | |
678 | return PTR_ERR(ctx); | |
679 | ||
7c119107 | 680 | mutex_lock(&ctx->mutex); |
75216638 | 681 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
7c119107 JG |
682 | mutex_unlock(&ctx->mutex); |
683 | ||
75216638 SH |
684 | ucma_put_ctx(ctx); |
685 | return ret; | |
686 | } | |
687 | ||
eebe4c3a SH |
688 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
689 | int in_len, int out_len) | |
690 | { | |
691 | struct rdma_ucm_bind cmd; | |
eebe4c3a SH |
692 | struct ucma_context *ctx; |
693 | int ret; | |
694 | ||
695 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
696 | return -EFAULT; | |
697 | ||
84652aef RD |
698 | if (cmd.reserved || !cmd.addr_size || |
699 | cmd.addr_size != rdma_addr_size_kss(&cmd.addr)) | |
eebe4c3a SH |
700 | return -EINVAL; |
701 | ||
702 | ctx = ucma_get_ctx(file, cmd.id); | |
703 | if (IS_ERR(ctx)) | |
704 | return PTR_ERR(ctx); | |
705 | ||
7c119107 | 706 | mutex_lock(&ctx->mutex); |
84652aef | 707 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
7c119107 | 708 | mutex_unlock(&ctx->mutex); |
eebe4c3a SH |
709 | ucma_put_ctx(ctx); |
710 | return ret; | |
711 | } | |
712 | ||
05ad9457 SH |
713 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
714 | const char __user *inbuf, | |
715 | int in_len, int out_len) | |
75216638 | 716 | { |
05ad9457 | 717 | struct rdma_ucm_resolve_ip cmd; |
75216638 SH |
718 | struct ucma_context *ctx; |
719 | int ret; | |
720 | ||
721 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
722 | return -EFAULT; | |
723 | ||
09abfe7b | 724 | if ((cmd.src_addr.sin6_family && !rdma_addr_size_in6(&cmd.src_addr)) || |
84652aef | 725 | !rdma_addr_size_in6(&cmd.dst_addr)) |
2975d5de LR |
726 | return -EINVAL; |
727 | ||
75216638 SH |
728 | ctx = ucma_get_ctx(file, cmd.id); |
729 | if (IS_ERR(ctx)) | |
730 | return PTR_ERR(ctx); | |
731 | ||
7c119107 | 732 | mutex_lock(&ctx->mutex); |
84652aef RD |
733 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
734 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
7c119107 | 735 | mutex_unlock(&ctx->mutex); |
75216638 SH |
736 | ucma_put_ctx(ctx); |
737 | return ret; | |
738 | } | |
739 | ||
209cf2a7 SH |
740 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
741 | const char __user *inbuf, | |
742 | int in_len, int out_len) | |
743 | { | |
744 | struct rdma_ucm_resolve_addr cmd; | |
209cf2a7 SH |
745 | struct ucma_context *ctx; |
746 | int ret; | |
747 | ||
748 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
749 | return -EFAULT; | |
750 | ||
84652aef RD |
751 | if (cmd.reserved || |
752 | (cmd.src_size && (cmd.src_size != rdma_addr_size_kss(&cmd.src_addr))) || | |
753 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size_kss(&cmd.dst_addr))) | |
209cf2a7 SH |
754 | return -EINVAL; |
755 | ||
756 | ctx = ucma_get_ctx(file, cmd.id); | |
757 | if (IS_ERR(ctx)) | |
758 | return PTR_ERR(ctx); | |
759 | ||
7c119107 | 760 | mutex_lock(&ctx->mutex); |
84652aef RD |
761 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
762 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
7c119107 | 763 | mutex_unlock(&ctx->mutex); |
209cf2a7 SH |
764 | ucma_put_ctx(ctx); |
765 | return ret; | |
766 | } | |
767 | ||
75216638 SH |
768 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
769 | const char __user *inbuf, | |
770 | int in_len, int out_len) | |
771 | { | |
772 | struct rdma_ucm_resolve_route cmd; | |
773 | struct ucma_context *ctx; | |
774 | int ret; | |
775 | ||
776 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
777 | return -EFAULT; | |
778 | ||
8b77586b | 779 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
780 | if (IS_ERR(ctx)) |
781 | return PTR_ERR(ctx); | |
782 | ||
7c119107 | 783 | mutex_lock(&ctx->mutex); |
75216638 | 784 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); |
7c119107 | 785 | mutex_unlock(&ctx->mutex); |
75216638 SH |
786 | ucma_put_ctx(ctx); |
787 | return ret; | |
788 | } | |
789 | ||
790 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
791 | struct rdma_route *route) | |
792 | { | |
793 | struct rdma_dev_addr *dev_addr; | |
794 | ||
795 | resp->num_paths = route->num_paths; | |
796 | switch (route->num_paths) { | |
797 | case 0: | |
798 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
799 | rdma_addr_get_dgid(dev_addr, |
800 | (union ib_gid *) &resp->ib_route[0].dgid); | |
801 | rdma_addr_get_sgid(dev_addr, | |
802 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
803 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
804 | break; | |
805 | case 2: | |
806 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
807 | &route->path_rec[1]); | |
808 | /* fall through */ | |
809 | case 1: | |
810 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
811 | &route->path_rec[0]); | |
812 | break; | |
813 | default: | |
814 | break; | |
815 | } | |
816 | } | |
817 | ||
3c86aa70 EC |
818 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
819 | struct rdma_route *route) | |
820 | { | |
3c86aa70 EC |
821 | |
822 | resp->num_paths = route->num_paths; | |
823 | switch (route->num_paths) { | |
824 | case 0: | |
7b85627b MS |
825 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
826 | (union ib_gid *)&resp->ib_route[0].dgid); | |
827 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, | |
828 | (union ib_gid *)&resp->ib_route[0].sgid); | |
3c86aa70 EC |
829 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
830 | break; | |
831 | case 2: | |
832 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
833 | &route->path_rec[1]); | |
834 | /* fall through */ | |
835 | case 1: | |
836 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
837 | &route->path_rec[0]); | |
838 | break; | |
839 | default: | |
840 | break; | |
841 | } | |
842 | } | |
843 | ||
e86f8b06 SW |
844 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
845 | struct rdma_route *route) | |
846 | { | |
847 | struct rdma_dev_addr *dev_addr; | |
848 | ||
849 | dev_addr = &route->addr.dev_addr; | |
850 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
851 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
852 | } | |
853 | ||
75216638 SH |
854 | static ssize_t ucma_query_route(struct ucma_file *file, |
855 | const char __user *inbuf, | |
856 | int in_len, int out_len) | |
857 | { | |
ee7aed45 | 858 | struct rdma_ucm_query cmd; |
75216638 SH |
859 | struct rdma_ucm_query_route_resp resp; |
860 | struct ucma_context *ctx; | |
861 | struct sockaddr *addr; | |
862 | int ret = 0; | |
863 | ||
17793833 | 864 | if (out_len < offsetof(struct rdma_ucm_query_route_resp, ibdev_index)) |
75216638 SH |
865 | return -ENOSPC; |
866 | ||
867 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
868 | return -EFAULT; | |
869 | ||
870 | ctx = ucma_get_ctx(file, cmd.id); | |
871 | if (IS_ERR(ctx)) | |
872 | return PTR_ERR(ctx); | |
873 | ||
7c119107 | 874 | mutex_lock(&ctx->mutex); |
75216638 | 875 | memset(&resp, 0, sizeof resp); |
3f446754 | 876 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
877 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
878 | sizeof(struct sockaddr_in) : | |
879 | sizeof(struct sockaddr_in6)); | |
3f446754 | 880 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
881 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
882 | sizeof(struct sockaddr_in) : | |
883 | sizeof(struct sockaddr_in6)); | |
884 | if (!ctx->cm_id->device) | |
885 | goto out; | |
886 | ||
9cda779c | 887 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
17793833 | 888 | resp.ibdev_index = ctx->cm_id->device->index; |
75216638 | 889 | resp.port_num = ctx->cm_id->port_num; |
c72f2189 | 890 | |
fe53ba2f | 891 | if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 | 892 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
5d9fb044 | 893 | else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 MW |
894 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
895 | else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) | |
e86f8b06 | 896 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
75216638 SH |
897 | |
898 | out: | |
7c119107 | 899 | mutex_unlock(&ctx->mutex); |
17793833 LR |
900 | if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, |
901 | min_t(size_t, out_len, sizeof(resp)))) | |
75216638 SH |
902 | ret = -EFAULT; |
903 | ||
904 | ucma_put_ctx(ctx); | |
905 | return ret; | |
906 | } | |
907 | ||
ee7aed45 SH |
908 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
909 | struct rdma_ucm_query_addr_resp *resp) | |
910 | { | |
911 | if (!cm_id->device) | |
912 | return; | |
913 | ||
914 | resp->node_guid = (__force __u64) cm_id->device->node_guid; | |
17793833 | 915 | resp->ibdev_index = cm_id->device->index; |
ee7aed45 SH |
916 | resp->port_num = cm_id->port_num; |
917 | resp->pkey = (__force __u16) cpu_to_be16( | |
918 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); | |
919 | } | |
920 | ||
921 | static ssize_t ucma_query_addr(struct ucma_context *ctx, | |
922 | void __user *response, int out_len) | |
923 | { | |
924 | struct rdma_ucm_query_addr_resp resp; | |
925 | struct sockaddr *addr; | |
926 | int ret = 0; | |
927 | ||
17793833 | 928 | if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) |
ee7aed45 SH |
929 | return -ENOSPC; |
930 | ||
931 | memset(&resp, 0, sizeof resp); | |
932 | ||
933 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; | |
934 | resp.src_size = rdma_addr_size(addr); | |
935 | memcpy(&resp.src_addr, addr, resp.src_size); | |
936 | ||
937 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; | |
938 | resp.dst_size = rdma_addr_size(addr); | |
939 | memcpy(&resp.dst_addr, addr, resp.dst_size); | |
940 | ||
941 | ucma_query_device_addr(ctx->cm_id, &resp); | |
942 | ||
17793833 | 943 | if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) |
ee7aed45 SH |
944 | ret = -EFAULT; |
945 | ||
946 | return ret; | |
947 | } | |
948 | ||
ac53b264 SH |
949 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
950 | void __user *response, int out_len) | |
951 | { | |
952 | struct rdma_ucm_query_path_resp *resp; | |
953 | int i, ret = 0; | |
954 | ||
955 | if (out_len < sizeof(*resp)) | |
956 | return -ENOSPC; | |
957 | ||
958 | resp = kzalloc(out_len, GFP_KERNEL); | |
959 | if (!resp) | |
960 | return -ENOMEM; | |
961 | ||
962 | resp->num_paths = ctx->cm_id->route.num_paths; | |
963 | for (i = 0, out_len -= sizeof(*resp); | |
964 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); | |
965 | i++, out_len -= sizeof(struct ib_path_rec_data)) { | |
57520751 | 966 | struct sa_path_rec *rec = &ctx->cm_id->route.path_rec[i]; |
ac53b264 SH |
967 | |
968 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | | |
969 | IB_PATH_BIDIRECTIONAL; | |
89838118 | 970 | if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { |
57520751 DC |
971 | struct sa_path_rec ib; |
972 | ||
973 | sa_convert_path_opa_to_ib(&ib, rec); | |
974 | ib_sa_pack_path(&ib, &resp->path_data[i].path_rec); | |
89838118 PP |
975 | |
976 | } else { | |
977 | ib_sa_pack_path(rec, &resp->path_data[i].path_rec); | |
57520751 | 978 | } |
ac53b264 SH |
979 | } |
980 | ||
9bcb8940 | 981 | if (copy_to_user(response, resp, struct_size(resp, path_data, i))) |
ac53b264 SH |
982 | ret = -EFAULT; |
983 | ||
984 | kfree(resp); | |
985 | return ret; | |
986 | } | |
987 | ||
edaa7a55 SH |
988 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
989 | void __user *response, int out_len) | |
990 | { | |
991 | struct rdma_ucm_query_addr_resp resp; | |
992 | struct sockaddr_ib *addr; | |
993 | int ret = 0; | |
994 | ||
17793833 | 995 | if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) |
edaa7a55 SH |
996 | return -ENOSPC; |
997 | ||
998 | memset(&resp, 0, sizeof resp); | |
999 | ||
1000 | ucma_query_device_addr(ctx->cm_id, &resp); | |
1001 | ||
1002 | addr = (struct sockaddr_ib *) &resp.src_addr; | |
1003 | resp.src_size = sizeof(*addr); | |
1004 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { | |
1005 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); | |
1006 | } else { | |
1007 | addr->sib_family = AF_IB; | |
1008 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
1009 | rdma_read_gids(ctx->cm_id, (union ib_gid *)&addr->sib_addr, |
1010 | NULL); | |
edaa7a55 SH |
1011 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
1012 | &ctx->cm_id->route.addr.src_addr); | |
1013 | } | |
1014 | ||
1015 | addr = (struct sockaddr_ib *) &resp.dst_addr; | |
1016 | resp.dst_size = sizeof(*addr); | |
1017 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { | |
1018 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); | |
1019 | } else { | |
1020 | addr->sib_family = AF_IB; | |
1021 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
1022 | rdma_read_gids(ctx->cm_id, NULL, |
1023 | (union ib_gid *)&addr->sib_addr); | |
edaa7a55 SH |
1024 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
1025 | &ctx->cm_id->route.addr.dst_addr); | |
1026 | } | |
1027 | ||
17793833 | 1028 | if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) |
edaa7a55 SH |
1029 | ret = -EFAULT; |
1030 | ||
1031 | return ret; | |
1032 | } | |
1033 | ||
ee7aed45 SH |
1034 | static ssize_t ucma_query(struct ucma_file *file, |
1035 | const char __user *inbuf, | |
1036 | int in_len, int out_len) | |
1037 | { | |
1038 | struct rdma_ucm_query cmd; | |
1039 | struct ucma_context *ctx; | |
1040 | void __user *response; | |
1041 | int ret; | |
1042 | ||
1043 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1044 | return -EFAULT; | |
1045 | ||
6f57c933 | 1046 | response = u64_to_user_ptr(cmd.response); |
ee7aed45 SH |
1047 | ctx = ucma_get_ctx(file, cmd.id); |
1048 | if (IS_ERR(ctx)) | |
1049 | return PTR_ERR(ctx); | |
1050 | ||
7c119107 | 1051 | mutex_lock(&ctx->mutex); |
ee7aed45 SH |
1052 | switch (cmd.option) { |
1053 | case RDMA_USER_CM_QUERY_ADDR: | |
1054 | ret = ucma_query_addr(ctx, response, out_len); | |
1055 | break; | |
ac53b264 SH |
1056 | case RDMA_USER_CM_QUERY_PATH: |
1057 | ret = ucma_query_path(ctx, response, out_len); | |
1058 | break; | |
edaa7a55 SH |
1059 | case RDMA_USER_CM_QUERY_GID: |
1060 | ret = ucma_query_gid(ctx, response, out_len); | |
1061 | break; | |
ee7aed45 SH |
1062 | default: |
1063 | ret = -ENOSYS; | |
1064 | break; | |
1065 | } | |
7c119107 | 1066 | mutex_unlock(&ctx->mutex); |
ee7aed45 SH |
1067 | |
1068 | ucma_put_ctx(ctx); | |
1069 | return ret; | |
1070 | } | |
1071 | ||
5c438135 SH |
1072 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
1073 | struct rdma_conn_param *dst, | |
75216638 SH |
1074 | struct rdma_ucm_conn_param *src) |
1075 | { | |
1076 | dst->private_data = src->private_data; | |
1077 | dst->private_data_len = src->private_data_len; | |
1078 | dst->responder_resources =src->responder_resources; | |
1079 | dst->initiator_depth = src->initiator_depth; | |
1080 | dst->flow_control = src->flow_control; | |
1081 | dst->retry_count = src->retry_count; | |
1082 | dst->rnr_retry_count = src->rnr_retry_count; | |
1083 | dst->srq = src->srq; | |
ca750d4a | 1084 | dst->qp_num = src->qp_num & 0xFFFFFF; |
5c438135 | 1085 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
75216638 SH |
1086 | } |
1087 | ||
1088 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
1089 | int in_len, int out_len) | |
1090 | { | |
75216638 | 1091 | struct rdma_conn_param conn_param; |
34e2ab57 LR |
1092 | struct rdma_ucm_ece ece = {}; |
1093 | struct rdma_ucm_connect cmd; | |
75216638 | 1094 | struct ucma_context *ctx; |
34e2ab57 | 1095 | size_t in_size; |
75216638 SH |
1096 | int ret; |
1097 | ||
31142a4b JG |
1098 | if (in_len < offsetofend(typeof(cmd), reserved)) |
1099 | return -EINVAL; | |
34e2ab57 LR |
1100 | in_size = min_t(size_t, in_len, sizeof(cmd)); |
1101 | if (copy_from_user(&cmd, inbuf, in_size)) | |
75216638 SH |
1102 | return -EFAULT; |
1103 | ||
1104 | if (!cmd.conn_param.valid) | |
1105 | return -EINVAL; | |
1106 | ||
8b77586b | 1107 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1108 | if (IS_ERR(ctx)) |
1109 | return PTR_ERR(ctx); | |
1110 | ||
5c438135 | 1111 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
34e2ab57 LR |
1112 | if (offsetofend(typeof(cmd), ece) <= in_size) { |
1113 | ece.vendor_id = cmd.ece.vendor_id; | |
1114 | ece.attr_mod = cmd.ece.attr_mod; | |
1115 | } | |
1116 | ||
7c119107 | 1117 | mutex_lock(&ctx->mutex); |
34e2ab57 | 1118 | ret = rdma_connect_ece(ctx->cm_id, &conn_param, &ece); |
7c119107 | 1119 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1120 | ucma_put_ctx(ctx); |
1121 | return ret; | |
1122 | } | |
1123 | ||
1124 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
1125 | int in_len, int out_len) | |
1126 | { | |
1127 | struct rdma_ucm_listen cmd; | |
1128 | struct ucma_context *ctx; | |
1129 | int ret; | |
1130 | ||
1131 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1132 | return -EFAULT; | |
1133 | ||
1134 | ctx = ucma_get_ctx(file, cmd.id); | |
1135 | if (IS_ERR(ctx)) | |
1136 | return PTR_ERR(ctx); | |
1137 | ||
26c15dec JG |
1138 | if (cmd.backlog <= 0 || cmd.backlog > max_backlog) |
1139 | cmd.backlog = max_backlog; | |
1140 | atomic_set(&ctx->backlog, cmd.backlog); | |
1141 | ||
7c119107 | 1142 | mutex_lock(&ctx->mutex); |
26c15dec | 1143 | ret = rdma_listen(ctx->cm_id, cmd.backlog); |
7c119107 | 1144 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1145 | ucma_put_ctx(ctx); |
1146 | return ret; | |
1147 | } | |
1148 | ||
1149 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
1150 | int in_len, int out_len) | |
1151 | { | |
1152 | struct rdma_ucm_accept cmd; | |
1153 | struct rdma_conn_param conn_param; | |
0cb15372 | 1154 | struct rdma_ucm_ece ece = {}; |
75216638 | 1155 | struct ucma_context *ctx; |
0cb15372 | 1156 | size_t in_size; |
75216638 SH |
1157 | int ret; |
1158 | ||
31142a4b JG |
1159 | if (in_len < offsetofend(typeof(cmd), reserved)) |
1160 | return -EINVAL; | |
0cb15372 LR |
1161 | in_size = min_t(size_t, in_len, sizeof(cmd)); |
1162 | if (copy_from_user(&cmd, inbuf, in_size)) | |
75216638 SH |
1163 | return -EFAULT; |
1164 | ||
8b77586b | 1165 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1166 | if (IS_ERR(ctx)) |
1167 | return PTR_ERR(ctx); | |
1168 | ||
0cb15372 LR |
1169 | if (offsetofend(typeof(cmd), ece) <= in_size) { |
1170 | ece.vendor_id = cmd.ece.vendor_id; | |
1171 | ece.attr_mod = cmd.ece.attr_mod; | |
1172 | } | |
1173 | ||
75216638 | 1174 | if (cmd.conn_param.valid) { |
5c438135 | 1175 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
7c119107 | 1176 | mutex_lock(&ctx->mutex); |
d114c6fe | 1177 | rdma_lock_handler(ctx->cm_id); |
0cb15372 | 1178 | ret = __rdma_accept_ece(ctx->cm_id, &conn_param, NULL, &ece); |
d114c6fe JG |
1179 | if (!ret) { |
1180 | /* The uid must be set atomically with the handler */ | |
9ced69ca | 1181 | ctx->uid = cmd.uid; |
d114c6fe JG |
1182 | } |
1183 | rdma_unlock_handler(ctx->cm_id); | |
1184 | mutex_unlock(&ctx->mutex); | |
7c119107 JG |
1185 | } else { |
1186 | mutex_lock(&ctx->mutex); | |
d114c6fe | 1187 | rdma_lock_handler(ctx->cm_id); |
0cb15372 | 1188 | ret = __rdma_accept_ece(ctx->cm_id, NULL, NULL, &ece); |
d114c6fe | 1189 | rdma_unlock_handler(ctx->cm_id); |
7c119107 JG |
1190 | mutex_unlock(&ctx->mutex); |
1191 | } | |
75216638 SH |
1192 | ucma_put_ctx(ctx); |
1193 | return ret; | |
1194 | } | |
1195 | ||
1196 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
1197 | int in_len, int out_len) | |
1198 | { | |
1199 | struct rdma_ucm_reject cmd; | |
1200 | struct ucma_context *ctx; | |
1201 | int ret; | |
1202 | ||
1203 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1204 | return -EFAULT; | |
1205 | ||
8094ba0a LR |
1206 | if (!cmd.reason) |
1207 | cmd.reason = IB_CM_REJ_CONSUMER_DEFINED; | |
1208 | ||
1209 | switch (cmd.reason) { | |
1210 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1211 | case IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED: | |
1212 | break; | |
1213 | default: | |
1214 | return -EINVAL; | |
1215 | } | |
1216 | ||
8b77586b | 1217 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1218 | if (IS_ERR(ctx)) |
1219 | return PTR_ERR(ctx); | |
1220 | ||
7c119107 | 1221 | mutex_lock(&ctx->mutex); |
8094ba0a LR |
1222 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len, |
1223 | cmd.reason); | |
7c119107 | 1224 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1225 | ucma_put_ctx(ctx); |
1226 | return ret; | |
1227 | } | |
1228 | ||
1229 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
1230 | int in_len, int out_len) | |
1231 | { | |
1232 | struct rdma_ucm_disconnect cmd; | |
1233 | struct ucma_context *ctx; | |
1234 | int ret; | |
1235 | ||
1236 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1237 | return -EFAULT; | |
1238 | ||
8b77586b | 1239 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1240 | if (IS_ERR(ctx)) |
1241 | return PTR_ERR(ctx); | |
1242 | ||
7c119107 | 1243 | mutex_lock(&ctx->mutex); |
75216638 | 1244 | ret = rdma_disconnect(ctx->cm_id); |
7c119107 | 1245 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1246 | ucma_put_ctx(ctx); |
1247 | return ret; | |
1248 | } | |
1249 | ||
1250 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
1251 | const char __user *inbuf, | |
1252 | int in_len, int out_len) | |
1253 | { | |
1254 | struct rdma_ucm_init_qp_attr cmd; | |
1255 | struct ib_uverbs_qp_attr resp; | |
1256 | struct ucma_context *ctx; | |
1257 | struct ib_qp_attr qp_attr; | |
1258 | int ret; | |
1259 | ||
1260 | if (out_len < sizeof(resp)) | |
1261 | return -ENOSPC; | |
1262 | ||
1263 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1264 | return -EFAULT; | |
1265 | ||
a5880b84 LR |
1266 | if (cmd.qp_state > IB_QPS_ERR) |
1267 | return -EINVAL; | |
1268 | ||
8b77586b | 1269 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1270 | if (IS_ERR(ctx)) |
1271 | return PTR_ERR(ctx); | |
1272 | ||
1273 | resp.qp_attr_mask = 0; | |
1274 | memset(&qp_attr, 0, sizeof qp_attr); | |
1275 | qp_attr.qp_state = cmd.qp_state; | |
7c119107 | 1276 | mutex_lock(&ctx->mutex); |
75216638 | 1277 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); |
7c119107 | 1278 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1279 | if (ret) |
1280 | goto out; | |
1281 | ||
d541e455 | 1282 | ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr); |
6f57c933 | 1283 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
1284 | &resp, sizeof(resp))) |
1285 | ret = -EFAULT; | |
1286 | ||
1287 | out: | |
1288 | ucma_put_ctx(ctx); | |
1289 | return ret; | |
1290 | } | |
1291 | ||
7ce86409 SH |
1292 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
1293 | void *optval, size_t optlen) | |
1294 | { | |
1295 | int ret = 0; | |
1296 | ||
1297 | switch (optname) { | |
1298 | case RDMA_OPTION_ID_TOS: | |
1299 | if (optlen != sizeof(u8)) { | |
1300 | ret = -EINVAL; | |
1301 | break; | |
1302 | } | |
1303 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
1304 | break; | |
a9bb7912 HS |
1305 | case RDMA_OPTION_ID_REUSEADDR: |
1306 | if (optlen != sizeof(int)) { | |
1307 | ret = -EINVAL; | |
1308 | break; | |
1309 | } | |
1310 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1311 | break; | |
68602120 SH |
1312 | case RDMA_OPTION_ID_AFONLY: |
1313 | if (optlen != sizeof(int)) { | |
1314 | ret = -EINVAL; | |
1315 | break; | |
1316 | } | |
1317 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1318 | break; | |
2c1619ed DG |
1319 | case RDMA_OPTION_ID_ACK_TIMEOUT: |
1320 | if (optlen != sizeof(u8)) { | |
1321 | ret = -EINVAL; | |
1322 | break; | |
1323 | } | |
1324 | ret = rdma_set_ack_timeout(ctx->cm_id, *((u8 *)optval)); | |
1325 | break; | |
7ce86409 SH |
1326 | default: |
1327 | ret = -ENOSYS; | |
1328 | } | |
1329 | ||
1330 | return ret; | |
1331 | } | |
1332 | ||
a7ca1f00 SH |
1333 | static int ucma_set_ib_path(struct ucma_context *ctx, |
1334 | struct ib_path_rec_data *path_data, size_t optlen) | |
1335 | { | |
c2f8fc4e | 1336 | struct sa_path_rec sa_path; |
a7ca1f00 SH |
1337 | struct rdma_cm_event event; |
1338 | int ret; | |
1339 | ||
1340 | if (optlen % sizeof(*path_data)) | |
1341 | return -EINVAL; | |
1342 | ||
1343 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
1344 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
1345 | IB_PATH_BIDIRECTIONAL)) | |
1346 | break; | |
1347 | } | |
1348 | ||
1349 | if (!optlen) | |
1350 | return -EINVAL; | |
1351 | ||
8435168d RD |
1352 | if (!ctx->cm_id->device) |
1353 | return -EINVAL; | |
1354 | ||
c2be9dc0 | 1355 | memset(&sa_path, 0, sizeof(sa_path)); |
c2be9dc0 | 1356 | |
57520751 | 1357 | sa_path.rec_type = SA_PATH_REC_TYPE_IB; |
a7ca1f00 | 1358 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
57520751 DC |
1359 | |
1360 | if (rdma_cap_opa_ah(ctx->cm_id->device, ctx->cm_id->port_num)) { | |
1361 | struct sa_path_rec opa; | |
1362 | ||
1363 | sa_convert_path_ib_to_opa(&opa, &sa_path); | |
7c119107 | 1364 | mutex_lock(&ctx->mutex); |
fe75889f | 1365 | ret = rdma_set_ib_path(ctx->cm_id, &opa); |
7c119107 | 1366 | mutex_unlock(&ctx->mutex); |
57520751 | 1367 | } else { |
7c119107 | 1368 | mutex_lock(&ctx->mutex); |
fe75889f | 1369 | ret = rdma_set_ib_path(ctx->cm_id, &sa_path); |
7c119107 | 1370 | mutex_unlock(&ctx->mutex); |
57520751 | 1371 | } |
a7ca1f00 SH |
1372 | if (ret) |
1373 | return ret; | |
1374 | ||
1375 | memset(&event, 0, sizeof event); | |
1376 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1377 | return ucma_event_handler(ctx->cm_id, &event); | |
1378 | } | |
1379 | ||
1380 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
1381 | void *optval, size_t optlen) | |
1382 | { | |
1383 | int ret; | |
1384 | ||
1385 | switch (optname) { | |
1386 | case RDMA_OPTION_IB_PATH: | |
1387 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
1388 | break; | |
1389 | default: | |
1390 | ret = -ENOSYS; | |
1391 | } | |
1392 | ||
1393 | return ret; | |
1394 | } | |
1395 | ||
7ce86409 SH |
1396 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
1397 | int optname, void *optval, size_t optlen) | |
1398 | { | |
1399 | int ret; | |
1400 | ||
1401 | switch (level) { | |
1402 | case RDMA_OPTION_ID: | |
7c119107 | 1403 | mutex_lock(&ctx->mutex); |
7ce86409 | 1404 | ret = ucma_set_option_id(ctx, optname, optval, optlen); |
7c119107 | 1405 | mutex_unlock(&ctx->mutex); |
7ce86409 | 1406 | break; |
a7ca1f00 SH |
1407 | case RDMA_OPTION_IB: |
1408 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
1409 | break; | |
7ce86409 SH |
1410 | default: |
1411 | ret = -ENOSYS; | |
1412 | } | |
1413 | ||
1414 | return ret; | |
1415 | } | |
1416 | ||
1417 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
1418 | int in_len, int out_len) | |
1419 | { | |
1420 | struct rdma_ucm_set_option cmd; | |
1421 | struct ucma_context *ctx; | |
1422 | void *optval; | |
1423 | int ret; | |
1424 | ||
1425 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1426 | return -EFAULT; | |
1427 | ||
ef95a90a SR |
1428 | if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE)) |
1429 | return -EINVAL; | |
1430 | ||
7ce86409 SH |
1431 | ctx = ucma_get_ctx(file, cmd.id); |
1432 | if (IS_ERR(ctx)) | |
1433 | return PTR_ERR(ctx); | |
1434 | ||
6f57c933 | 1435 | optval = memdup_user(u64_to_user_ptr(cmd.optval), |
0764c76e RD |
1436 | cmd.optlen); |
1437 | if (IS_ERR(optval)) { | |
1438 | ret = PTR_ERR(optval); | |
1439 | goto out; | |
7ce86409 SH |
1440 | } |
1441 | ||
1442 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1443 | cmd.optlen); | |
7ce86409 | 1444 | kfree(optval); |
0764c76e RD |
1445 | |
1446 | out: | |
7ce86409 SH |
1447 | ucma_put_ctx(ctx); |
1448 | return ret; | |
1449 | } | |
1450 | ||
75216638 SH |
1451 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1452 | int in_len, int out_len) | |
1453 | { | |
1454 | struct rdma_ucm_notify cmd; | |
1455 | struct ucma_context *ctx; | |
c8d3bcbf | 1456 | int ret = -EINVAL; |
75216638 SH |
1457 | |
1458 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1459 | return -EFAULT; | |
1460 | ||
1461 | ctx = ucma_get_ctx(file, cmd.id); | |
1462 | if (IS_ERR(ctx)) | |
1463 | return PTR_ERR(ctx); | |
1464 | ||
7c119107 | 1465 | mutex_lock(&ctx->mutex); |
c8d3bcbf LR |
1466 | if (ctx->cm_id->device) |
1467 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type)cmd.event); | |
7c119107 | 1468 | mutex_unlock(&ctx->mutex); |
c8d3bcbf | 1469 | |
75216638 SH |
1470 | ucma_put_ctx(ctx); |
1471 | return ret; | |
1472 | } | |
1473 | ||
5bc2b7b3 SH |
1474 | static ssize_t ucma_process_join(struct ucma_file *file, |
1475 | struct rdma_ucm_join_mcast *cmd, int out_len) | |
c8f6a362 | 1476 | { |
c8f6a362 SH |
1477 | struct rdma_ucm_create_id_resp resp; |
1478 | struct ucma_context *ctx; | |
1479 | struct ucma_multicast *mc; | |
5bc2b7b3 | 1480 | struct sockaddr *addr; |
c8f6a362 | 1481 | int ret; |
ab15c95a | 1482 | u8 join_state; |
c8f6a362 SH |
1483 | |
1484 | if (out_len < sizeof(resp)) | |
1485 | return -ENOSPC; | |
1486 | ||
5bc2b7b3 | 1487 | addr = (struct sockaddr *) &cmd->addr; |
0c81ffc6 | 1488 | if (cmd->addr_size != rdma_addr_size(addr)) |
ab15c95a AV |
1489 | return -EINVAL; |
1490 | ||
1491 | if (cmd->join_flags == RDMA_MC_JOIN_FLAG_FULLMEMBER) | |
1492 | join_state = BIT(FULLMEMBER_JOIN); | |
1493 | else if (cmd->join_flags == RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER) | |
1494 | join_state = BIT(SENDONLY_FULLMEMBER_JOIN); | |
1495 | else | |
5bc2b7b3 | 1496 | return -EINVAL; |
c8f6a362 | 1497 | |
8b77586b | 1498 | ctx = ucma_get_ctx_dev(file, cmd->id); |
c8f6a362 SH |
1499 | if (IS_ERR(ctx)) |
1500 | return PTR_ERR(ctx); | |
1501 | ||
95fe5109 | 1502 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); |
6aea938f JB |
1503 | if (!mc) { |
1504 | ret = -ENOMEM; | |
c8f6a362 SH |
1505 | goto err1; |
1506 | } | |
95fe5109 JG |
1507 | |
1508 | mc->ctx = ctx; | |
ab15c95a | 1509 | mc->join_state = join_state; |
5bc2b7b3 SH |
1510 | mc->uid = cmd->uid; |
1511 | memcpy(&mc->addr, addr, cmd->addr_size); | |
95fe5109 JG |
1512 | |
1513 | if (xa_alloc(&multicast_table, &mc->id, NULL, xa_limit_32b, | |
1514 | GFP_KERNEL)) { | |
1515 | ret = -ENOMEM; | |
1516 | goto err1; | |
1517 | } | |
1518 | ||
7c119107 | 1519 | mutex_lock(&ctx->mutex); |
ab15c95a AV |
1520 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *)&mc->addr, |
1521 | join_state, mc); | |
7c119107 | 1522 | mutex_unlock(&ctx->mutex); |
c8f6a362 SH |
1523 | if (ret) |
1524 | goto err2; | |
1525 | ||
1526 | resp.id = mc->id; | |
6f57c933 | 1527 | if (copy_to_user(u64_to_user_ptr(cmd->response), |
c8f6a362 SH |
1528 | &resp, sizeof(resp))) { |
1529 | ret = -EFAULT; | |
1530 | goto err3; | |
1531 | } | |
1532 | ||
4dfd5321 | 1533 | xa_store(&multicast_table, mc->id, mc, 0); |
cb2595c1 | 1534 | |
c8f6a362 SH |
1535 | ucma_put_ctx(ctx); |
1536 | return 0; | |
1537 | ||
1538 | err3: | |
38e03d09 | 1539 | mutex_lock(&ctx->mutex); |
3f446754 | 1540 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
38e03d09 | 1541 | mutex_unlock(&ctx->mutex); |
c8f6a362 SH |
1542 | ucma_cleanup_mc_events(mc); |
1543 | err2: | |
4dfd5321 | 1544 | xa_erase(&multicast_table, mc->id); |
c8f6a362 SH |
1545 | kfree(mc); |
1546 | err1: | |
c8f6a362 SH |
1547 | ucma_put_ctx(ctx); |
1548 | return ret; | |
1549 | } | |
1550 | ||
5bc2b7b3 SH |
1551 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
1552 | const char __user *inbuf, | |
1553 | int in_len, int out_len) | |
1554 | { | |
1555 | struct rdma_ucm_join_ip_mcast cmd; | |
1556 | struct rdma_ucm_join_mcast join_cmd; | |
1557 | ||
1558 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1559 | return -EFAULT; | |
1560 | ||
1561 | join_cmd.response = cmd.response; | |
1562 | join_cmd.uid = cmd.uid; | |
1563 | join_cmd.id = cmd.id; | |
84652aef | 1564 | join_cmd.addr_size = rdma_addr_size_in6(&cmd.addr); |
0c81ffc6 LR |
1565 | if (!join_cmd.addr_size) |
1566 | return -EINVAL; | |
1567 | ||
ab15c95a | 1568 | join_cmd.join_flags = RDMA_MC_JOIN_FLAG_FULLMEMBER; |
5bc2b7b3 SH |
1569 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); |
1570 | ||
1571 | return ucma_process_join(file, &join_cmd, out_len); | |
1572 | } | |
1573 | ||
1574 | static ssize_t ucma_join_multicast(struct ucma_file *file, | |
1575 | const char __user *inbuf, | |
1576 | int in_len, int out_len) | |
1577 | { | |
1578 | struct rdma_ucm_join_mcast cmd; | |
1579 | ||
1580 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1581 | return -EFAULT; | |
1582 | ||
84652aef | 1583 | if (!rdma_addr_size_kss(&cmd.addr)) |
0c81ffc6 LR |
1584 | return -EINVAL; |
1585 | ||
5bc2b7b3 SH |
1586 | return ucma_process_join(file, &cmd, out_len); |
1587 | } | |
1588 | ||
c8f6a362 SH |
1589 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
1590 | const char __user *inbuf, | |
1591 | int in_len, int out_len) | |
1592 | { | |
1593 | struct rdma_ucm_destroy_id cmd; | |
1594 | struct rdma_ucm_destroy_id_resp resp; | |
1595 | struct ucma_multicast *mc; | |
1596 | int ret = 0; | |
1597 | ||
1598 | if (out_len < sizeof(resp)) | |
1599 | return -ENOSPC; | |
1600 | ||
1601 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1602 | return -EFAULT; | |
1603 | ||
4dfd5321 MW |
1604 | xa_lock(&multicast_table); |
1605 | mc = xa_load(&multicast_table, cmd.id); | |
c8f6a362 SH |
1606 | if (!mc) |
1607 | mc = ERR_PTR(-ENOENT); | |
09e328e4 | 1608 | else if (READ_ONCE(mc->ctx->file) != file) |
c8f6a362 | 1609 | mc = ERR_PTR(-EINVAL); |
167b95ec | 1610 | else if (!refcount_inc_not_zero(&mc->ctx->ref)) |
7e967fd0 JG |
1611 | mc = ERR_PTR(-ENXIO); |
1612 | else | |
4dfd5321 MW |
1613 | __xa_erase(&multicast_table, mc->id); |
1614 | xa_unlock(&multicast_table); | |
c8f6a362 SH |
1615 | |
1616 | if (IS_ERR(mc)) { | |
1617 | ret = PTR_ERR(mc); | |
1618 | goto out; | |
1619 | } | |
1620 | ||
7c119107 | 1621 | mutex_lock(&mc->ctx->mutex); |
3f446754 | 1622 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
7c119107 JG |
1623 | mutex_unlock(&mc->ctx->mutex); |
1624 | ||
c8f6a362 | 1625 | ucma_cleanup_mc_events(mc); |
c8f6a362 SH |
1626 | |
1627 | ucma_put_ctx(mc->ctx); | |
1628 | resp.events_reported = mc->events_reported; | |
1629 | kfree(mc); | |
1630 | ||
6f57c933 | 1631 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
c8f6a362 SH |
1632 | &resp, sizeof(resp))) |
1633 | ret = -EFAULT; | |
1634 | out: | |
1635 | return ret; | |
1636 | } | |
1637 | ||
88314e4d SH |
1638 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1639 | { | |
1640 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1641 | if (file1 < file2) { | |
1642 | mutex_lock(&file1->mut); | |
31b57b87 | 1643 | mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1644 | } else { |
1645 | mutex_lock(&file2->mut); | |
31b57b87 | 1646 | mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1647 | } |
1648 | } | |
1649 | ||
1650 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1651 | { | |
1652 | if (file1 < file2) { | |
1653 | mutex_unlock(&file2->mut); | |
1654 | mutex_unlock(&file1->mut); | |
1655 | } else { | |
1656 | mutex_unlock(&file1->mut); | |
1657 | mutex_unlock(&file2->mut); | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1662 | { | |
1663 | struct ucma_event *uevent, *tmp; | |
1664 | ||
1665 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1666 | if (uevent->ctx == ctx) | |
1667 | list_move_tail(&uevent->list, &file->event_list); | |
1668 | } | |
1669 | ||
1670 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1671 | const char __user *inbuf, | |
1672 | int in_len, int out_len) | |
1673 | { | |
1674 | struct rdma_ucm_migrate_id cmd; | |
1675 | struct rdma_ucm_migrate_resp resp; | |
1676 | struct ucma_context *ctx; | |
2903ff01 | 1677 | struct fd f; |
88314e4d SH |
1678 | struct ucma_file *cur_file; |
1679 | int ret = 0; | |
1680 | ||
1681 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1682 | return -EFAULT; | |
1683 | ||
1684 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1685 | f = fdget(cmd.fd); |
1686 | if (!f.file) | |
88314e4d | 1687 | return -ENOENT; |
0d23ba60 JH |
1688 | if (f.file->f_op != &ucma_fops) { |
1689 | ret = -EINVAL; | |
1690 | goto file_put; | |
1691 | } | |
88314e4d SH |
1692 | |
1693 | /* Validate current fd and prevent destruction of id. */ | |
2903ff01 | 1694 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
88314e4d SH |
1695 | if (IS_ERR(ctx)) { |
1696 | ret = PTR_ERR(ctx); | |
1697 | goto file_put; | |
1698 | } | |
1699 | ||
09e328e4 | 1700 | rdma_lock_handler(ctx->cm_id); |
88314e4d SH |
1701 | cur_file = ctx->file; |
1702 | if (cur_file == new_file) { | |
98837c6c | 1703 | mutex_lock(&cur_file->mut); |
88314e4d | 1704 | resp.events_reported = ctx->events_reported; |
98837c6c | 1705 | mutex_unlock(&cur_file->mut); |
88314e4d SH |
1706 | goto response; |
1707 | } | |
1708 | ||
1709 | /* | |
1710 | * Migrate events between fd's, maintaining order, and avoiding new | |
1711 | * events being added before existing events. | |
1712 | */ | |
1713 | ucma_lock_files(cur_file, new_file); | |
afcafe07 | 1714 | xa_lock(&ctx_table); |
88314e4d SH |
1715 | |
1716 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1717 | ucma_move_events(ctx, new_file); | |
1718 | ctx->file = new_file; | |
1719 | resp.events_reported = ctx->events_reported; | |
1720 | ||
afcafe07 | 1721 | xa_unlock(&ctx_table); |
88314e4d SH |
1722 | ucma_unlock_files(cur_file, new_file); |
1723 | ||
1724 | response: | |
6f57c933 | 1725 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
88314e4d SH |
1726 | &resp, sizeof(resp))) |
1727 | ret = -EFAULT; | |
1728 | ||
09e328e4 | 1729 | rdma_unlock_handler(ctx->cm_id); |
88314e4d SH |
1730 | ucma_put_ctx(ctx); |
1731 | file_put: | |
2903ff01 | 1732 | fdput(f); |
88314e4d SH |
1733 | return ret; |
1734 | } | |
1735 | ||
75216638 SH |
1736 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1737 | const char __user *inbuf, | |
1738 | int in_len, int out_len) = { | |
05ad9457 SH |
1739 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
1740 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1741 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, | |
1742 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, | |
1743 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, | |
1744 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1745 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1746 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1747 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1748 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1749 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1750 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1751 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1752 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
1753 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, | |
1754 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, | |
1755 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, | |
1756 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
1757 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, | |
eebe4c3a | 1758 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
209cf2a7 | 1759 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
5bc2b7b3 SH |
1760 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
1761 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast | |
75216638 SH |
1762 | }; |
1763 | ||
1764 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1765 | size_t len, loff_t *pos) | |
1766 | { | |
1767 | struct ucma_file *file = filp->private_data; | |
1768 | struct rdma_ucm_cmd_hdr hdr; | |
1769 | ssize_t ret; | |
1770 | ||
f73a1dbc LR |
1771 | if (!ib_safe_file_access(filp)) { |
1772 | pr_err_once("ucma_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n", | |
1773 | task_tgid_vnr(current), current->comm); | |
e6bd18f5 | 1774 | return -EACCES; |
f73a1dbc | 1775 | } |
e6bd18f5 | 1776 | |
75216638 SH |
1777 | if (len < sizeof(hdr)) |
1778 | return -EINVAL; | |
1779 | ||
1780 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1781 | return -EFAULT; | |
1782 | ||
caf6e3f2 | 1783 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 | 1784 | return -EINVAL; |
a3671a4f | 1785 | hdr.cmd = array_index_nospec(hdr.cmd, ARRAY_SIZE(ucma_cmd_table)); |
75216638 SH |
1786 | |
1787 | if (hdr.in + sizeof(hdr) > len) | |
1788 | return -EINVAL; | |
1789 | ||
1790 | if (!ucma_cmd_table[hdr.cmd]) | |
1791 | return -ENOSYS; | |
1792 | ||
1793 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1794 | if (!ret) | |
1795 | ret = len; | |
1796 | ||
1797 | return ret; | |
1798 | } | |
1799 | ||
afc9a42b | 1800 | static __poll_t ucma_poll(struct file *filp, struct poll_table_struct *wait) |
75216638 SH |
1801 | { |
1802 | struct ucma_file *file = filp->private_data; | |
afc9a42b | 1803 | __poll_t mask = 0; |
75216638 SH |
1804 | |
1805 | poll_wait(filp, &file->poll_wait, wait); | |
1806 | ||
1807 | if (!list_empty(&file->event_list)) | |
a9a08845 | 1808 | mask = EPOLLIN | EPOLLRDNORM; |
75216638 SH |
1809 | |
1810 | return mask; | |
1811 | } | |
1812 | ||
f7a6117e RD |
1813 | /* |
1814 | * ucma_open() does not need the BKL: | |
1815 | * | |
1816 | * - no global state is referred to; | |
1817 | * - there is no ioctl method to race against; | |
1818 | * - no further module initialization is required for open to work | |
1819 | * after the device is registered. | |
1820 | */ | |
75216638 SH |
1821 | static int ucma_open(struct inode *inode, struct file *filp) |
1822 | { | |
1823 | struct ucma_file *file; | |
1824 | ||
1825 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1826 | if (!file) | |
1827 | return -ENOMEM; | |
1828 | ||
a190d3b0 BS |
1829 | file->close_wq = alloc_ordered_workqueue("ucma_close_id", |
1830 | WQ_MEM_RECLAIM); | |
0174b381 SL |
1831 | if (!file->close_wq) { |
1832 | kfree(file); | |
1833 | return -ENOMEM; | |
1834 | } | |
1835 | ||
75216638 SH |
1836 | INIT_LIST_HEAD(&file->event_list); |
1837 | INIT_LIST_HEAD(&file->ctx_list); | |
1838 | init_waitqueue_head(&file->poll_wait); | |
1839 | mutex_init(&file->mut); | |
1840 | ||
1841 | filp->private_data = file; | |
1842 | file->filp = filp; | |
bc1db9af | 1843 | |
c5bf68fe | 1844 | return stream_open(inode, filp); |
75216638 SH |
1845 | } |
1846 | ||
1847 | static int ucma_close(struct inode *inode, struct file *filp) | |
1848 | { | |
1849 | struct ucma_file *file = filp->private_data; | |
1850 | struct ucma_context *ctx, *tmp; | |
1851 | ||
07e266a7 JG |
1852 | /* |
1853 | * ctx_list can only be mutated under the write(), which is no longer | |
1854 | * possible, so no locking needed. | |
1855 | */ | |
75216638 | 1856 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { |
07e266a7 | 1857 | xa_erase(&ctx_table, ctx->id); |
c07e12d8 | 1858 | __destroy_id(ctx); |
75216638 | 1859 | } |
e1c30298 | 1860 | destroy_workqueue(file->close_wq); |
75216638 SH |
1861 | kfree(file); |
1862 | return 0; | |
1863 | } | |
1864 | ||
2b8693c0 | 1865 | static const struct file_operations ucma_fops = { |
75216638 SH |
1866 | .owner = THIS_MODULE, |
1867 | .open = ucma_open, | |
1868 | .release = ucma_close, | |
1869 | .write = ucma_write, | |
1870 | .poll = ucma_poll, | |
bc1db9af | 1871 | .llseek = no_llseek, |
75216638 SH |
1872 | }; |
1873 | ||
1874 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1875 | .minor = MISC_DYNAMIC_MINOR, |
1876 | .name = "rdma_cm", | |
1877 | .nodename = "infiniband/rdma_cm", | |
1878 | .mode = 0666, | |
1879 | .fops = &ucma_fops, | |
75216638 SH |
1880 | }; |
1881 | ||
8f71bb00 JG |
1882 | static int ucma_get_global_nl_info(struct ib_client_nl_info *res) |
1883 | { | |
1884 | res->abi = RDMA_USER_CM_ABI_VERSION; | |
1885 | res->cdev = ucma_misc.this_device; | |
1886 | return 0; | |
1887 | } | |
1888 | ||
1889 | static struct ib_client rdma_cma_client = { | |
1890 | .name = "rdma_cm", | |
1891 | .get_global_nl_info = ucma_get_global_nl_info, | |
1892 | }; | |
1893 | MODULE_ALIAS_RDMA_CLIENT("rdma_cm"); | |
1894 | ||
75216638 SH |
1895 | static ssize_t show_abi_version(struct device *dev, |
1896 | struct device_attribute *attr, | |
1897 | char *buf) | |
1898 | { | |
1899 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1900 | } | |
1901 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1902 | ||
1903 | static int __init ucma_init(void) | |
1904 | { | |
1905 | int ret; | |
1906 | ||
1907 | ret = misc_register(&ucma_misc); | |
1908 | if (ret) | |
1909 | return ret; | |
1910 | ||
1911 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1912 | if (ret) { | |
aba25a3e | 1913 | pr_err("rdma_ucm: couldn't create abi_version attr\n"); |
97cb7e40 SW |
1914 | goto err1; |
1915 | } | |
1916 | ||
ec8f23ce | 1917 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 | 1918 | if (!ucma_ctl_table_hdr) { |
aba25a3e | 1919 | pr_err("rdma_ucm: couldn't register sysctl paths\n"); |
97cb7e40 SW |
1920 | ret = -ENOMEM; |
1921 | goto err2; | |
75216638 | 1922 | } |
8f71bb00 JG |
1923 | |
1924 | ret = ib_register_client(&rdma_cma_client); | |
1925 | if (ret) | |
1926 | goto err3; | |
1927 | ||
75216638 | 1928 | return 0; |
8f71bb00 JG |
1929 | err3: |
1930 | unregister_net_sysctl_table(ucma_ctl_table_hdr); | |
97cb7e40 SW |
1931 | err2: |
1932 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1933 | err1: | |
75216638 SH |
1934 | misc_deregister(&ucma_misc); |
1935 | return ret; | |
1936 | } | |
1937 | ||
1938 | static void __exit ucma_cleanup(void) | |
1939 | { | |
8f71bb00 | 1940 | ib_unregister_client(&rdma_cma_client); |
5dd3df10 | 1941 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1942 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1943 | misc_deregister(&ucma_misc); | |
75216638 SH |
1944 | } |
1945 | ||
1946 | module_init(ucma_init); | |
1947 | module_exit(ucma_cleanup); |