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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; | |
83 | }; | |
84 | ||
85 | struct ucma_context { | |
afcafe07 | 86 | u32 id; |
75216638 | 87 | struct completion comp; |
167b95ec | 88 | refcount_t ref; |
75216638 | 89 | int events_reported; |
26c15dec | 90 | atomic_t backlog; |
75216638 SH |
91 | |
92 | struct ucma_file *file; | |
93 | struct rdma_cm_id *cm_id; | |
7c119107 | 94 | struct mutex mutex; |
75216638 SH |
95 | u64 uid; |
96 | ||
97 | struct list_head list; | |
e1c30298 YH |
98 | /* sync between removal event and id destroy, protected by file mut */ |
99 | int destroying; | |
100 | struct work_struct close_work; | |
c8f6a362 SH |
101 | }; |
102 | ||
103 | struct ucma_multicast { | |
104 | struct ucma_context *ctx; | |
4dfd5321 | 105 | u32 id; |
c8f6a362 SH |
106 | int events_reported; |
107 | ||
108 | u64 uid; | |
ab15c95a | 109 | u8 join_state; |
3f446754 | 110 | struct sockaddr_storage addr; |
75216638 SH |
111 | }; |
112 | ||
113 | struct ucma_event { | |
114 | struct ucma_context *ctx; | |
c7a198c7 | 115 | struct ucma_context *conn_req_ctx; |
c8f6a362 | 116 | struct ucma_multicast *mc; |
75216638 | 117 | struct list_head list; |
75216638 SH |
118 | struct rdma_ucm_event_resp resp; |
119 | }; | |
120 | ||
afcafe07 | 121 | static DEFINE_XARRAY_ALLOC(ctx_table); |
4dfd5321 | 122 | static DEFINE_XARRAY_ALLOC(multicast_table); |
75216638 | 123 | |
0d23ba60 | 124 | static const struct file_operations ucma_fops; |
620db1a1 | 125 | static int __destroy_id(struct ucma_context *ctx); |
0d23ba60 | 126 | |
75216638 SH |
127 | static inline struct ucma_context *_ucma_find_context(int id, |
128 | struct ucma_file *file) | |
129 | { | |
130 | struct ucma_context *ctx; | |
131 | ||
afcafe07 | 132 | ctx = xa_load(&ctx_table, id); |
75216638 SH |
133 | if (!ctx) |
134 | ctx = ERR_PTR(-ENOENT); | |
620db1a1 | 135 | else if (ctx->file != file) |
75216638 SH |
136 | ctx = ERR_PTR(-EINVAL); |
137 | return ctx; | |
138 | } | |
139 | ||
140 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
141 | { | |
142 | struct ucma_context *ctx; | |
143 | ||
afcafe07 | 144 | xa_lock(&ctx_table); |
75216638 | 145 | ctx = _ucma_find_context(id, file); |
657360d6 JG |
146 | if (!IS_ERR(ctx)) |
147 | if (!refcount_inc_not_zero(&ctx->ref)) | |
ca2968c1 | 148 | ctx = ERR_PTR(-ENXIO); |
afcafe07 | 149 | xa_unlock(&ctx_table); |
75216638 SH |
150 | return ctx; |
151 | } | |
152 | ||
153 | static void ucma_put_ctx(struct ucma_context *ctx) | |
154 | { | |
167b95ec | 155 | if (refcount_dec_and_test(&ctx->ref)) |
75216638 SH |
156 | complete(&ctx->comp); |
157 | } | |
158 | ||
8b77586b JG |
159 | /* |
160 | * Same as ucm_get_ctx but requires that ->cm_id->device is valid, eg that the | |
161 | * CM_ID is bound. | |
162 | */ | |
163 | static struct ucma_context *ucma_get_ctx_dev(struct ucma_file *file, int id) | |
164 | { | |
165 | struct ucma_context *ctx = ucma_get_ctx(file, id); | |
166 | ||
167 | if (IS_ERR(ctx)) | |
168 | return ctx; | |
169 | if (!ctx->cm_id->device) { | |
170 | ucma_put_ctx(ctx); | |
171 | return ERR_PTR(-EINVAL); | |
172 | } | |
173 | return ctx; | |
174 | } | |
175 | ||
e1c30298 YH |
176 | static void ucma_close_id(struct work_struct *work) |
177 | { | |
178 | struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); | |
179 | ||
180 | /* once all inflight tasks are finished, we close all underlying | |
181 | * resources. The context is still alive till its explicit destryoing | |
182 | * by its creator. | |
183 | */ | |
184 | ucma_put_ctx(ctx); | |
185 | wait_for_completion(&ctx->comp); | |
186 | /* No new events will be generated after destroying the id. */ | |
187 | rdma_destroy_id(ctx->cm_id); | |
657360d6 JG |
188 | |
189 | /* | |
190 | * At this point ctx->ref is zero so the only place the ctx can be is in | |
191 | * a uevent or in __destroy_id(). Since the former doesn't touch | |
192 | * ctx->cm_id and the latter sync cancels this, there is no races with | |
193 | * this store. | |
194 | */ | |
195 | ctx->cm_id = NULL; | |
e1c30298 YH |
196 | } |
197 | ||
75216638 SH |
198 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
199 | { | |
200 | struct ucma_context *ctx; | |
75216638 SH |
201 | |
202 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
203 | if (!ctx) | |
204 | return NULL; | |
205 | ||
e1c30298 | 206 | INIT_WORK(&ctx->close_work, ucma_close_id); |
167b95ec | 207 | refcount_set(&ctx->ref, 1); |
75216638 | 208 | init_completion(&ctx->comp); |
620db1a1 JG |
209 | /* So list_del() will work if we don't do ucma_finish_ctx() */ |
210 | INIT_LIST_HEAD(&ctx->list); | |
75216638 | 211 | ctx->file = file; |
7c119107 | 212 | mutex_init(&ctx->mutex); |
75216638 | 213 | |
620db1a1 JG |
214 | if (xa_alloc(&ctx_table, &ctx->id, NULL, xa_limit_32b, GFP_KERNEL)) { |
215 | kfree(ctx); | |
216 | return NULL; | |
217 | } | |
75216638 | 218 | return ctx; |
620db1a1 | 219 | } |
75216638 | 220 | |
620db1a1 JG |
221 | static void ucma_finish_ctx(struct ucma_context *ctx) |
222 | { | |
223 | lockdep_assert_held(&ctx->file->mut); | |
224 | list_add_tail(&ctx->list, &ctx->file->ctx_list); | |
225 | xa_store(&ctx_table, ctx->id, ctx, GFP_KERNEL); | |
75216638 SH |
226 | } |
227 | ||
228 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, | |
229 | struct rdma_conn_param *src) | |
230 | { | |
231 | if (src->private_data_len) | |
232 | memcpy(dst->private_data, src->private_data, | |
233 | src->private_data_len); | |
234 | dst->private_data_len = src->private_data_len; | |
235 | dst->responder_resources =src->responder_resources; | |
236 | dst->initiator_depth = src->initiator_depth; | |
237 | dst->flow_control = src->flow_control; | |
238 | dst->retry_count = src->retry_count; | |
239 | dst->rnr_retry_count = src->rnr_retry_count; | |
240 | dst->srq = src->srq; | |
241 | dst->qp_num = src->qp_num; | |
242 | } | |
243 | ||
d541e455 DC |
244 | static void ucma_copy_ud_event(struct ib_device *device, |
245 | struct rdma_ucm_ud_param *dst, | |
75216638 SH |
246 | struct rdma_ud_param *src) |
247 | { | |
248 | if (src->private_data_len) | |
249 | memcpy(dst->private_data, src->private_data, | |
250 | src->private_data_len); | |
251 | dst->private_data_len = src->private_data_len; | |
d541e455 | 252 | ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr); |
75216638 SH |
253 | dst->qp_num = src->qp_num; |
254 | dst->qkey = src->qkey; | |
255 | } | |
256 | ||
a1d33b70 JG |
257 | static struct ucma_event *ucma_create_uevent(struct ucma_context *ctx, |
258 | struct rdma_cm_event *event) | |
75216638 | 259 | { |
a1d33b70 JG |
260 | struct ucma_event *uevent; |
261 | ||
262 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
263 | if (!uevent) | |
264 | return NULL; | |
265 | ||
75216638 | 266 | uevent->ctx = ctx; |
c8f6a362 SH |
267 | switch (event->event) { |
268 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
269 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
270 | uevent->mc = (struct ucma_multicast *) | |
271 | event->param.ud.private_data; | |
272 | uevent->resp.uid = uevent->mc->uid; | |
273 | uevent->resp.id = uevent->mc->id; | |
274 | break; | |
275 | default: | |
276 | uevent->resp.uid = ctx->uid; | |
277 | uevent->resp.id = ctx->id; | |
278 | break; | |
279 | } | |
a1d33b70 JG |
280 | uevent->resp.event = event->event; |
281 | uevent->resp.status = event->status; | |
282 | if (ctx->cm_id->qp_type == IB_QPT_UD) | |
283 | ucma_copy_ud_event(ctx->cm_id->device, &uevent->resp.param.ud, | |
284 | &event->param.ud); | |
285 | else | |
286 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
287 | &event->param.conn); | |
288 | ||
289 | uevent->resp.ece.vendor_id = event->ece.vendor_id; | |
290 | uevent->resp.ece.attr_mod = event->ece.attr_mod; | |
291 | return uevent; | |
75216638 SH |
292 | } |
293 | ||
a1d33b70 JG |
294 | static int ucma_connect_event_handler(struct rdma_cm_id *cm_id, |
295 | struct rdma_cm_event *event) | |
e1c30298 | 296 | { |
a1d33b70 JG |
297 | struct ucma_context *listen_ctx = cm_id->context; |
298 | struct ucma_context *ctx; | |
299 | struct ucma_event *uevent; | |
e1c30298 | 300 | |
a1d33b70 JG |
301 | if (!atomic_add_unless(&listen_ctx->backlog, -1, 0)) |
302 | return -ENOMEM; | |
303 | ctx = ucma_alloc_ctx(listen_ctx->file); | |
304 | if (!ctx) | |
305 | goto err_backlog; | |
306 | ctx->cm_id = cm_id; | |
e1c30298 | 307 | |
a1d33b70 JG |
308 | uevent = ucma_create_uevent(listen_ctx, event); |
309 | if (!uevent) | |
310 | goto err_alloc; | |
c7a198c7 | 311 | uevent->conn_req_ctx = ctx; |
a1d33b70 JG |
312 | uevent->resp.id = ctx->id; |
313 | ||
314 | ctx->cm_id->context = ctx; | |
e1c30298 | 315 | |
310ca1a7 | 316 | mutex_lock(&ctx->file->mut); |
a1d33b70 JG |
317 | ucma_finish_ctx(ctx); |
318 | list_add_tail(&uevent->list, &ctx->file->event_list); | |
310ca1a7 | 319 | mutex_unlock(&ctx->file->mut); |
a1d33b70 JG |
320 | wake_up_interruptible(&ctx->file->poll_wait); |
321 | return 0; | |
322 | ||
323 | err_alloc: | |
324 | xa_erase(&ctx_table, ctx->id); | |
325 | kfree(ctx); | |
326 | err_backlog: | |
327 | atomic_inc(&listen_ctx->backlog); | |
328 | /* Returning error causes the new ID to be destroyed */ | |
329 | return -ENOMEM; | |
e1c30298 YH |
330 | } |
331 | ||
75216638 SH |
332 | static int ucma_event_handler(struct rdma_cm_id *cm_id, |
333 | struct rdma_cm_event *event) | |
334 | { | |
335 | struct ucma_event *uevent; | |
336 | struct ucma_context *ctx = cm_id->context; | |
75216638 | 337 | |
a1d33b70 JG |
338 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) |
339 | return ucma_connect_event_handler(cm_id, event); | |
75216638 | 340 | |
a1d33b70 JG |
341 | /* |
342 | * We ignore events for new connections until userspace has set their | |
343 | * context. This can only happen if an error occurs on a new connection | |
344 | * before the user accepts it. This is okay, since the accept will just | |
345 | * fail later. However, we do need to release the underlying HW | |
346 | * resources in case of a device removal event. | |
347 | */ | |
348 | if (ctx->uid) { | |
349 | uevent = ucma_create_uevent(ctx, event); | |
350 | if (!uevent) | |
351 | return 0; | |
352 | ||
353 | mutex_lock(&ctx->file->mut); | |
354 | list_add_tail(&uevent->list, &ctx->file->event_list); | |
355 | mutex_unlock(&ctx->file->mut); | |
356 | wake_up_interruptible(&ctx->file->poll_wait); | |
75216638 | 357 | } |
0cefcf0b | 358 | |
657360d6 JG |
359 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL && !ctx->destroying) |
360 | queue_work(system_unbound_wq, &ctx->close_work); | |
310ca1a7 | 361 | return 0; |
75216638 SH |
362 | } |
363 | ||
364 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
365 | int in_len, int out_len) | |
366 | { | |
75216638 SH |
367 | struct rdma_ucm_get_event cmd; |
368 | struct ucma_event *uevent; | |
75216638 | 369 | |
611cb92b JG |
370 | /* |
371 | * Old 32 bit user space does not send the 4 byte padding in the | |
372 | * reserved field. We don't care, allow it to keep working. | |
373 | */ | |
93531ee7 LR |
374 | if (out_len < sizeof(uevent->resp) - sizeof(uevent->resp.reserved) - |
375 | sizeof(uevent->resp.ece)) | |
75216638 SH |
376 | return -ENOSPC; |
377 | ||
378 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
379 | return -EFAULT; | |
380 | ||
381 | mutex_lock(&file->mut); | |
382 | while (list_empty(&file->event_list)) { | |
d92f7644 | 383 | mutex_unlock(&file->mut); |
75216638 | 384 | |
d92f7644 SH |
385 | if (file->filp->f_flags & O_NONBLOCK) |
386 | return -EAGAIN; | |
387 | ||
388 | if (wait_event_interruptible(file->poll_wait, | |
389 | !list_empty(&file->event_list))) | |
390 | return -ERESTARTSYS; | |
75216638 | 391 | |
75216638 | 392 | mutex_lock(&file->mut); |
75216638 SH |
393 | } |
394 | ||
620db1a1 | 395 | uevent = list_first_entry(&file->event_list, struct ucma_event, list); |
75216638 | 396 | |
6f57c933 | 397 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
611cb92b JG |
398 | &uevent->resp, |
399 | min_t(size_t, out_len, sizeof(uevent->resp)))) { | |
a1d33b70 JG |
400 | mutex_unlock(&file->mut); |
401 | return -EFAULT; | |
75216638 SH |
402 | } |
403 | ||
404 | list_del(&uevent->list); | |
405 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
406 | if (uevent->mc) |
407 | uevent->mc->events_reported++; | |
a1d33b70 JG |
408 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) |
409 | atomic_inc(&uevent->ctx->backlog); | |
620db1a1 JG |
410 | mutex_unlock(&file->mut); |
411 | ||
75216638 | 412 | kfree(uevent); |
620db1a1 | 413 | return 0; |
75216638 SH |
414 | } |
415 | ||
b26f9b99 SH |
416 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
417 | { | |
418 | switch (cmd->ps) { | |
419 | case RDMA_PS_TCP: | |
420 | *qp_type = IB_QPT_RC; | |
421 | return 0; | |
422 | case RDMA_PS_UDP: | |
423 | case RDMA_PS_IPOIB: | |
424 | *qp_type = IB_QPT_UD; | |
425 | return 0; | |
638ef7a6 SH |
426 | case RDMA_PS_IB: |
427 | *qp_type = cmd->qp_type; | |
428 | return 0; | |
b26f9b99 SH |
429 | default: |
430 | return -EINVAL; | |
431 | } | |
432 | } | |
433 | ||
434 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
435 | int in_len, int out_len) | |
75216638 SH |
436 | { |
437 | struct rdma_ucm_create_id cmd; | |
438 | struct rdma_ucm_create_id_resp resp; | |
439 | struct ucma_context *ctx; | |
e8980d67 | 440 | struct rdma_cm_id *cm_id; |
b26f9b99 | 441 | enum ib_qp_type qp_type; |
75216638 SH |
442 | int ret; |
443 | ||
444 | if (out_len < sizeof(resp)) | |
445 | return -ENOSPC; | |
446 | ||
447 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
448 | return -EFAULT; | |
449 | ||
b26f9b99 SH |
450 | ret = ucma_get_qp_type(&cmd, &qp_type); |
451 | if (ret) | |
452 | return ret; | |
453 | ||
75216638 | 454 | ctx = ucma_alloc_ctx(file); |
75216638 SH |
455 | if (!ctx) |
456 | return -ENOMEM; | |
457 | ||
458 | ctx->uid = cmd.uid; | |
b09c4d70 | 459 | cm_id = rdma_create_user_id(ucma_event_handler, ctx, cmd.ps, qp_type); |
e8980d67 LR |
460 | if (IS_ERR(cm_id)) { |
461 | ret = PTR_ERR(cm_id); | |
75216638 SH |
462 | goto err1; |
463 | } | |
620db1a1 | 464 | ctx->cm_id = cm_id; |
75216638 SH |
465 | |
466 | resp.id = ctx->id; | |
6f57c933 | 467 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 | 468 | &resp, sizeof(resp))) { |
620db1a1 JG |
469 | xa_erase(&ctx_table, ctx->id); |
470 | __destroy_id(ctx); | |
471 | return -EFAULT; | |
75216638 | 472 | } |
e8980d67 | 473 | |
620db1a1 JG |
474 | mutex_lock(&file->mut); |
475 | ucma_finish_ctx(ctx); | |
476 | mutex_unlock(&file->mut); | |
75216638 SH |
477 | return 0; |
478 | ||
75216638 | 479 | err1: |
afcafe07 | 480 | xa_erase(&ctx_table, ctx->id); |
75216638 SH |
481 | kfree(ctx); |
482 | return ret; | |
483 | } | |
484 | ||
c8f6a362 SH |
485 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
486 | { | |
95fe5109 JG |
487 | struct ucma_multicast *mc; |
488 | unsigned long index; | |
c8f6a362 | 489 | |
95fe5109 JG |
490 | xa_for_each(&multicast_table, index, mc) { |
491 | if (mc->ctx != ctx) | |
492 | continue; | |
493 | /* | |
494 | * At this point mc->ctx->ref is 0 so the mc cannot leave the | |
495 | * lock on the reader and this is enough serialization | |
496 | */ | |
497 | xa_erase(&multicast_table, index); | |
c8f6a362 SH |
498 | kfree(mc); |
499 | } | |
c8f6a362 SH |
500 | } |
501 | ||
c8f6a362 SH |
502 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
503 | { | |
504 | struct ucma_event *uevent, *tmp; | |
505 | ||
09e328e4 | 506 | rdma_lock_handler(mc->ctx->cm_id); |
95fe5109 | 507 | mutex_lock(&mc->ctx->file->mut); |
c8f6a362 SH |
508 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { |
509 | if (uevent->mc != mc) | |
510 | continue; | |
511 | ||
512 | list_del(&uevent->list); | |
513 | kfree(uevent); | |
514 | } | |
95fe5109 | 515 | mutex_unlock(&mc->ctx->file->mut); |
09e328e4 | 516 | rdma_unlock_handler(mc->ctx->cm_id); |
c8f6a362 SH |
517 | } |
518 | ||
186834b5 | 519 | /* |
e1c30298 YH |
520 | * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At |
521 | * this point, no new events will be reported from the hardware. However, we | |
522 | * still need to cleanup the UCMA context for this ID. Specifically, there | |
523 | * might be events that have not yet been consumed by the user space software. | |
e1c30298 | 524 | * mutex. After that we release them as needed. |
186834b5 | 525 | */ |
75216638 SH |
526 | static int ucma_free_ctx(struct ucma_context *ctx) |
527 | { | |
528 | int events_reported; | |
186834b5 HS |
529 | struct ucma_event *uevent, *tmp; |
530 | LIST_HEAD(list); | |
75216638 | 531 | |
c8f6a362 SH |
532 | ucma_cleanup_multicast(ctx); |
533 | ||
75216638 SH |
534 | /* Cleanup events not yet reported to the user. */ |
535 | mutex_lock(&ctx->file->mut); | |
186834b5 | 536 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
c7a198c7 | 537 | if (uevent->ctx == ctx || uevent->conn_req_ctx == ctx) |
186834b5 HS |
538 | list_move_tail(&uevent->list, &list); |
539 | } | |
75216638 | 540 | list_del(&ctx->list); |
98837c6c | 541 | events_reported = ctx->events_reported; |
75216638 SH |
542 | mutex_unlock(&ctx->file->mut); |
543 | ||
a1d33b70 JG |
544 | /* |
545 | * If this was a listening ID then any connections spawned from it | |
546 | * that have not been delivered to userspace are cleaned up too. | |
547 | * Must be done outside any locks. | |
548 | */ | |
186834b5 HS |
549 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
550 | list_del(&uevent->list); | |
c7a198c7 MG |
551 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST && |
552 | uevent->conn_req_ctx != ctx) | |
553 | __destroy_id(uevent->conn_req_ctx); | |
186834b5 HS |
554 | kfree(uevent); |
555 | } | |
556 | ||
7c119107 | 557 | mutex_destroy(&ctx->mutex); |
75216638 SH |
558 | kfree(ctx); |
559 | return events_reported; | |
560 | } | |
561 | ||
c07e12d8 JG |
562 | static int __destroy_id(struct ucma_context *ctx) |
563 | { | |
308571de JG |
564 | /* |
565 | * If the refcount is already 0 then ucma_close_id() has already | |
566 | * destroyed the cm_id, otherwise holding the refcount keeps cm_id | |
567 | * valid. Prevent queue_work() from being called. | |
568 | */ | |
569 | if (refcount_inc_not_zero(&ctx->ref)) { | |
570 | rdma_lock_handler(ctx->cm_id); | |
571 | ctx->destroying = 1; | |
572 | rdma_unlock_handler(ctx->cm_id); | |
573 | ucma_put_ctx(ctx); | |
574 | } | |
c07e12d8 | 575 | |
657360d6 | 576 | cancel_work_sync(&ctx->close_work); |
c07e12d8 | 577 | /* At this point it's guaranteed that there is no inflight closing task */ |
657360d6 JG |
578 | if (ctx->cm_id) |
579 | ucma_close_id(&ctx->close_work); | |
c07e12d8 JG |
580 | return ucma_free_ctx(ctx); |
581 | } | |
582 | ||
75216638 SH |
583 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, |
584 | int in_len, int out_len) | |
585 | { | |
586 | struct rdma_ucm_destroy_id cmd; | |
587 | struct rdma_ucm_destroy_id_resp resp; | |
588 | struct ucma_context *ctx; | |
589 | int ret = 0; | |
590 | ||
591 | if (out_len < sizeof(resp)) | |
592 | return -ENOSPC; | |
593 | ||
594 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
595 | return -EFAULT; | |
596 | ||
afcafe07 | 597 | xa_lock(&ctx_table); |
75216638 SH |
598 | ctx = _ucma_find_context(cmd.id, file); |
599 | if (!IS_ERR(ctx)) | |
afcafe07 MW |
600 | __xa_erase(&ctx_table, ctx->id); |
601 | xa_unlock(&ctx_table); | |
75216638 SH |
602 | |
603 | if (IS_ERR(ctx)) | |
604 | return PTR_ERR(ctx); | |
605 | ||
c07e12d8 | 606 | resp.events_reported = __destroy_id(ctx); |
6f57c933 | 607 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
608 | &resp, sizeof(resp))) |
609 | ret = -EFAULT; | |
610 | ||
611 | return ret; | |
612 | } | |
613 | ||
05ad9457 | 614 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
75216638 SH |
615 | int in_len, int out_len) |
616 | { | |
05ad9457 | 617 | struct rdma_ucm_bind_ip cmd; |
75216638 SH |
618 | struct ucma_context *ctx; |
619 | int ret; | |
620 | ||
621 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
622 | return -EFAULT; | |
623 | ||
84652aef RD |
624 | if (!rdma_addr_size_in6(&cmd.addr)) |
625 | return -EINVAL; | |
626 | ||
75216638 SH |
627 | ctx = ucma_get_ctx(file, cmd.id); |
628 | if (IS_ERR(ctx)) | |
629 | return PTR_ERR(ctx); | |
630 | ||
7c119107 | 631 | mutex_lock(&ctx->mutex); |
75216638 | 632 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
7c119107 JG |
633 | mutex_unlock(&ctx->mutex); |
634 | ||
75216638 SH |
635 | ucma_put_ctx(ctx); |
636 | return ret; | |
637 | } | |
638 | ||
eebe4c3a SH |
639 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
640 | int in_len, int out_len) | |
641 | { | |
642 | struct rdma_ucm_bind cmd; | |
eebe4c3a SH |
643 | struct ucma_context *ctx; |
644 | int ret; | |
645 | ||
646 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
647 | return -EFAULT; | |
648 | ||
84652aef RD |
649 | if (cmd.reserved || !cmd.addr_size || |
650 | cmd.addr_size != rdma_addr_size_kss(&cmd.addr)) | |
eebe4c3a SH |
651 | return -EINVAL; |
652 | ||
653 | ctx = ucma_get_ctx(file, cmd.id); | |
654 | if (IS_ERR(ctx)) | |
655 | return PTR_ERR(ctx); | |
656 | ||
7c119107 | 657 | mutex_lock(&ctx->mutex); |
84652aef | 658 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
7c119107 | 659 | mutex_unlock(&ctx->mutex); |
eebe4c3a SH |
660 | ucma_put_ctx(ctx); |
661 | return ret; | |
662 | } | |
663 | ||
05ad9457 SH |
664 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
665 | const char __user *inbuf, | |
666 | int in_len, int out_len) | |
75216638 | 667 | { |
05ad9457 | 668 | struct rdma_ucm_resolve_ip cmd; |
75216638 SH |
669 | struct ucma_context *ctx; |
670 | int ret; | |
671 | ||
672 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
673 | return -EFAULT; | |
674 | ||
09abfe7b | 675 | if ((cmd.src_addr.sin6_family && !rdma_addr_size_in6(&cmd.src_addr)) || |
84652aef | 676 | !rdma_addr_size_in6(&cmd.dst_addr)) |
2975d5de LR |
677 | return -EINVAL; |
678 | ||
75216638 SH |
679 | ctx = ucma_get_ctx(file, cmd.id); |
680 | if (IS_ERR(ctx)) | |
681 | return PTR_ERR(ctx); | |
682 | ||
7c119107 | 683 | mutex_lock(&ctx->mutex); |
84652aef RD |
684 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
685 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
7c119107 | 686 | mutex_unlock(&ctx->mutex); |
75216638 SH |
687 | ucma_put_ctx(ctx); |
688 | return ret; | |
689 | } | |
690 | ||
209cf2a7 SH |
691 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
692 | const char __user *inbuf, | |
693 | int in_len, int out_len) | |
694 | { | |
695 | struct rdma_ucm_resolve_addr cmd; | |
209cf2a7 SH |
696 | struct ucma_context *ctx; |
697 | int ret; | |
698 | ||
699 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
700 | return -EFAULT; | |
701 | ||
84652aef RD |
702 | if (cmd.reserved || |
703 | (cmd.src_size && (cmd.src_size != rdma_addr_size_kss(&cmd.src_addr))) || | |
704 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size_kss(&cmd.dst_addr))) | |
209cf2a7 SH |
705 | return -EINVAL; |
706 | ||
707 | ctx = ucma_get_ctx(file, cmd.id); | |
708 | if (IS_ERR(ctx)) | |
709 | return PTR_ERR(ctx); | |
710 | ||
7c119107 | 711 | mutex_lock(&ctx->mutex); |
84652aef RD |
712 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
713 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
7c119107 | 714 | mutex_unlock(&ctx->mutex); |
209cf2a7 SH |
715 | ucma_put_ctx(ctx); |
716 | return ret; | |
717 | } | |
718 | ||
75216638 SH |
719 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
720 | const char __user *inbuf, | |
721 | int in_len, int out_len) | |
722 | { | |
723 | struct rdma_ucm_resolve_route cmd; | |
724 | struct ucma_context *ctx; | |
725 | int ret; | |
726 | ||
727 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
728 | return -EFAULT; | |
729 | ||
8b77586b | 730 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
731 | if (IS_ERR(ctx)) |
732 | return PTR_ERR(ctx); | |
733 | ||
7c119107 | 734 | mutex_lock(&ctx->mutex); |
75216638 | 735 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); |
7c119107 | 736 | mutex_unlock(&ctx->mutex); |
75216638 SH |
737 | ucma_put_ctx(ctx); |
738 | return ret; | |
739 | } | |
740 | ||
741 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
742 | struct rdma_route *route) | |
743 | { | |
744 | struct rdma_dev_addr *dev_addr; | |
745 | ||
746 | resp->num_paths = route->num_paths; | |
747 | switch (route->num_paths) { | |
748 | case 0: | |
749 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
750 | rdma_addr_get_dgid(dev_addr, |
751 | (union ib_gid *) &resp->ib_route[0].dgid); | |
752 | rdma_addr_get_sgid(dev_addr, | |
753 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
754 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
755 | break; | |
756 | case 2: | |
757 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
758 | &route->path_rec[1]); | |
df561f66 | 759 | fallthrough; |
75216638 SH |
760 | case 1: |
761 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
762 | &route->path_rec[0]); | |
763 | break; | |
764 | default: | |
765 | break; | |
766 | } | |
767 | } | |
768 | ||
3c86aa70 EC |
769 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
770 | struct rdma_route *route) | |
771 | { | |
3c86aa70 EC |
772 | |
773 | resp->num_paths = route->num_paths; | |
774 | switch (route->num_paths) { | |
775 | case 0: | |
7b85627b MS |
776 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
777 | (union ib_gid *)&resp->ib_route[0].dgid); | |
778 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, | |
779 | (union ib_gid *)&resp->ib_route[0].sgid); | |
3c86aa70 EC |
780 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
781 | break; | |
782 | case 2: | |
783 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
784 | &route->path_rec[1]); | |
df561f66 | 785 | fallthrough; |
3c86aa70 EC |
786 | case 1: |
787 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
788 | &route->path_rec[0]); | |
789 | break; | |
790 | default: | |
791 | break; | |
792 | } | |
793 | } | |
794 | ||
e86f8b06 SW |
795 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
796 | struct rdma_route *route) | |
797 | { | |
798 | struct rdma_dev_addr *dev_addr; | |
799 | ||
800 | dev_addr = &route->addr.dev_addr; | |
801 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
802 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
803 | } | |
804 | ||
75216638 SH |
805 | static ssize_t ucma_query_route(struct ucma_file *file, |
806 | const char __user *inbuf, | |
807 | int in_len, int out_len) | |
808 | { | |
ee7aed45 | 809 | struct rdma_ucm_query cmd; |
75216638 SH |
810 | struct rdma_ucm_query_route_resp resp; |
811 | struct ucma_context *ctx; | |
812 | struct sockaddr *addr; | |
813 | int ret = 0; | |
814 | ||
17793833 | 815 | if (out_len < offsetof(struct rdma_ucm_query_route_resp, ibdev_index)) |
75216638 SH |
816 | return -ENOSPC; |
817 | ||
818 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
819 | return -EFAULT; | |
820 | ||
821 | ctx = ucma_get_ctx(file, cmd.id); | |
822 | if (IS_ERR(ctx)) | |
823 | return PTR_ERR(ctx); | |
824 | ||
7c119107 | 825 | mutex_lock(&ctx->mutex); |
75216638 | 826 | memset(&resp, 0, sizeof resp); |
3f446754 | 827 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
828 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
829 | sizeof(struct sockaddr_in) : | |
830 | sizeof(struct sockaddr_in6)); | |
3f446754 | 831 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
832 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
833 | sizeof(struct sockaddr_in) : | |
834 | sizeof(struct sockaddr_in6)); | |
835 | if (!ctx->cm_id->device) | |
836 | goto out; | |
837 | ||
9cda779c | 838 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
17793833 | 839 | resp.ibdev_index = ctx->cm_id->device->index; |
75216638 | 840 | resp.port_num = ctx->cm_id->port_num; |
c72f2189 | 841 | |
fe53ba2f | 842 | if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 | 843 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
5d9fb044 | 844 | else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 MW |
845 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
846 | else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) | |
e86f8b06 | 847 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
75216638 SH |
848 | |
849 | out: | |
7c119107 | 850 | mutex_unlock(&ctx->mutex); |
17793833 LR |
851 | if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, |
852 | min_t(size_t, out_len, sizeof(resp)))) | |
75216638 SH |
853 | ret = -EFAULT; |
854 | ||
855 | ucma_put_ctx(ctx); | |
856 | return ret; | |
857 | } | |
858 | ||
ee7aed45 SH |
859 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
860 | struct rdma_ucm_query_addr_resp *resp) | |
861 | { | |
862 | if (!cm_id->device) | |
863 | return; | |
864 | ||
865 | resp->node_guid = (__force __u64) cm_id->device->node_guid; | |
17793833 | 866 | resp->ibdev_index = cm_id->device->index; |
ee7aed45 SH |
867 | resp->port_num = cm_id->port_num; |
868 | resp->pkey = (__force __u16) cpu_to_be16( | |
869 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); | |
870 | } | |
871 | ||
872 | static ssize_t ucma_query_addr(struct ucma_context *ctx, | |
873 | void __user *response, int out_len) | |
874 | { | |
875 | struct rdma_ucm_query_addr_resp resp; | |
876 | struct sockaddr *addr; | |
877 | int ret = 0; | |
878 | ||
17793833 | 879 | if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) |
ee7aed45 SH |
880 | return -ENOSPC; |
881 | ||
882 | memset(&resp, 0, sizeof resp); | |
883 | ||
884 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; | |
885 | resp.src_size = rdma_addr_size(addr); | |
886 | memcpy(&resp.src_addr, addr, resp.src_size); | |
887 | ||
888 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; | |
889 | resp.dst_size = rdma_addr_size(addr); | |
890 | memcpy(&resp.dst_addr, addr, resp.dst_size); | |
891 | ||
892 | ucma_query_device_addr(ctx->cm_id, &resp); | |
893 | ||
17793833 | 894 | if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) |
ee7aed45 SH |
895 | ret = -EFAULT; |
896 | ||
897 | return ret; | |
898 | } | |
899 | ||
ac53b264 SH |
900 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
901 | void __user *response, int out_len) | |
902 | { | |
903 | struct rdma_ucm_query_path_resp *resp; | |
904 | int i, ret = 0; | |
905 | ||
906 | if (out_len < sizeof(*resp)) | |
907 | return -ENOSPC; | |
908 | ||
909 | resp = kzalloc(out_len, GFP_KERNEL); | |
910 | if (!resp) | |
911 | return -ENOMEM; | |
912 | ||
913 | resp->num_paths = ctx->cm_id->route.num_paths; | |
914 | for (i = 0, out_len -= sizeof(*resp); | |
915 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); | |
916 | i++, out_len -= sizeof(struct ib_path_rec_data)) { | |
57520751 | 917 | struct sa_path_rec *rec = &ctx->cm_id->route.path_rec[i]; |
ac53b264 SH |
918 | |
919 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | | |
920 | IB_PATH_BIDIRECTIONAL; | |
89838118 | 921 | if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { |
57520751 DC |
922 | struct sa_path_rec ib; |
923 | ||
924 | sa_convert_path_opa_to_ib(&ib, rec); | |
925 | ib_sa_pack_path(&ib, &resp->path_data[i].path_rec); | |
89838118 PP |
926 | |
927 | } else { | |
928 | ib_sa_pack_path(rec, &resp->path_data[i].path_rec); | |
57520751 | 929 | } |
ac53b264 SH |
930 | } |
931 | ||
9bcb8940 | 932 | if (copy_to_user(response, resp, struct_size(resp, path_data, i))) |
ac53b264 SH |
933 | ret = -EFAULT; |
934 | ||
935 | kfree(resp); | |
936 | return ret; | |
937 | } | |
938 | ||
edaa7a55 SH |
939 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
940 | void __user *response, int out_len) | |
941 | { | |
942 | struct rdma_ucm_query_addr_resp resp; | |
943 | struct sockaddr_ib *addr; | |
944 | int ret = 0; | |
945 | ||
17793833 | 946 | if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) |
edaa7a55 SH |
947 | return -ENOSPC; |
948 | ||
949 | memset(&resp, 0, sizeof resp); | |
950 | ||
951 | ucma_query_device_addr(ctx->cm_id, &resp); | |
952 | ||
953 | addr = (struct sockaddr_ib *) &resp.src_addr; | |
954 | resp.src_size = sizeof(*addr); | |
955 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { | |
956 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); | |
957 | } else { | |
958 | addr->sib_family = AF_IB; | |
959 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
960 | rdma_read_gids(ctx->cm_id, (union ib_gid *)&addr->sib_addr, |
961 | NULL); | |
edaa7a55 SH |
962 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
963 | &ctx->cm_id->route.addr.src_addr); | |
964 | } | |
965 | ||
966 | addr = (struct sockaddr_ib *) &resp.dst_addr; | |
967 | resp.dst_size = sizeof(*addr); | |
968 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { | |
969 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); | |
970 | } else { | |
971 | addr->sib_family = AF_IB; | |
972 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
973 | rdma_read_gids(ctx->cm_id, NULL, |
974 | (union ib_gid *)&addr->sib_addr); | |
edaa7a55 SH |
975 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
976 | &ctx->cm_id->route.addr.dst_addr); | |
977 | } | |
978 | ||
17793833 | 979 | if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) |
edaa7a55 SH |
980 | ret = -EFAULT; |
981 | ||
982 | return ret; | |
983 | } | |
984 | ||
ee7aed45 SH |
985 | static ssize_t ucma_query(struct ucma_file *file, |
986 | const char __user *inbuf, | |
987 | int in_len, int out_len) | |
988 | { | |
989 | struct rdma_ucm_query cmd; | |
990 | struct ucma_context *ctx; | |
991 | void __user *response; | |
992 | int ret; | |
993 | ||
994 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
995 | return -EFAULT; | |
996 | ||
6f57c933 | 997 | response = u64_to_user_ptr(cmd.response); |
ee7aed45 SH |
998 | ctx = ucma_get_ctx(file, cmd.id); |
999 | if (IS_ERR(ctx)) | |
1000 | return PTR_ERR(ctx); | |
1001 | ||
7c119107 | 1002 | mutex_lock(&ctx->mutex); |
ee7aed45 SH |
1003 | switch (cmd.option) { |
1004 | case RDMA_USER_CM_QUERY_ADDR: | |
1005 | ret = ucma_query_addr(ctx, response, out_len); | |
1006 | break; | |
ac53b264 SH |
1007 | case RDMA_USER_CM_QUERY_PATH: |
1008 | ret = ucma_query_path(ctx, response, out_len); | |
1009 | break; | |
edaa7a55 SH |
1010 | case RDMA_USER_CM_QUERY_GID: |
1011 | ret = ucma_query_gid(ctx, response, out_len); | |
1012 | break; | |
ee7aed45 SH |
1013 | default: |
1014 | ret = -ENOSYS; | |
1015 | break; | |
1016 | } | |
7c119107 | 1017 | mutex_unlock(&ctx->mutex); |
ee7aed45 SH |
1018 | |
1019 | ucma_put_ctx(ctx); | |
1020 | return ret; | |
1021 | } | |
1022 | ||
5c438135 SH |
1023 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
1024 | struct rdma_conn_param *dst, | |
75216638 SH |
1025 | struct rdma_ucm_conn_param *src) |
1026 | { | |
1027 | dst->private_data = src->private_data; | |
1028 | dst->private_data_len = src->private_data_len; | |
1029 | dst->responder_resources =src->responder_resources; | |
1030 | dst->initiator_depth = src->initiator_depth; | |
1031 | dst->flow_control = src->flow_control; | |
1032 | dst->retry_count = src->retry_count; | |
1033 | dst->rnr_retry_count = src->rnr_retry_count; | |
1034 | dst->srq = src->srq; | |
ca750d4a | 1035 | dst->qp_num = src->qp_num & 0xFFFFFF; |
5c438135 | 1036 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
75216638 SH |
1037 | } |
1038 | ||
1039 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
1040 | int in_len, int out_len) | |
1041 | { | |
75216638 | 1042 | struct rdma_conn_param conn_param; |
34e2ab57 LR |
1043 | struct rdma_ucm_ece ece = {}; |
1044 | struct rdma_ucm_connect cmd; | |
75216638 | 1045 | struct ucma_context *ctx; |
34e2ab57 | 1046 | size_t in_size; |
75216638 SH |
1047 | int ret; |
1048 | ||
31142a4b JG |
1049 | if (in_len < offsetofend(typeof(cmd), reserved)) |
1050 | return -EINVAL; | |
34e2ab57 LR |
1051 | in_size = min_t(size_t, in_len, sizeof(cmd)); |
1052 | if (copy_from_user(&cmd, inbuf, in_size)) | |
75216638 SH |
1053 | return -EFAULT; |
1054 | ||
1055 | if (!cmd.conn_param.valid) | |
1056 | return -EINVAL; | |
1057 | ||
8b77586b | 1058 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1059 | if (IS_ERR(ctx)) |
1060 | return PTR_ERR(ctx); | |
1061 | ||
5c438135 | 1062 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
34e2ab57 LR |
1063 | if (offsetofend(typeof(cmd), ece) <= in_size) { |
1064 | ece.vendor_id = cmd.ece.vendor_id; | |
1065 | ece.attr_mod = cmd.ece.attr_mod; | |
1066 | } | |
1067 | ||
7c119107 | 1068 | mutex_lock(&ctx->mutex); |
34e2ab57 | 1069 | ret = rdma_connect_ece(ctx->cm_id, &conn_param, &ece); |
7c119107 | 1070 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1071 | ucma_put_ctx(ctx); |
1072 | return ret; | |
1073 | } | |
1074 | ||
1075 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
1076 | int in_len, int out_len) | |
1077 | { | |
1078 | struct rdma_ucm_listen cmd; | |
1079 | struct ucma_context *ctx; | |
1080 | int ret; | |
1081 | ||
1082 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1083 | return -EFAULT; | |
1084 | ||
1085 | ctx = ucma_get_ctx(file, cmd.id); | |
1086 | if (IS_ERR(ctx)) | |
1087 | return PTR_ERR(ctx); | |
1088 | ||
26c15dec JG |
1089 | if (cmd.backlog <= 0 || cmd.backlog > max_backlog) |
1090 | cmd.backlog = max_backlog; | |
1091 | atomic_set(&ctx->backlog, cmd.backlog); | |
1092 | ||
7c119107 | 1093 | mutex_lock(&ctx->mutex); |
26c15dec | 1094 | ret = rdma_listen(ctx->cm_id, cmd.backlog); |
7c119107 | 1095 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1096 | ucma_put_ctx(ctx); |
1097 | return ret; | |
1098 | } | |
1099 | ||
1100 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
1101 | int in_len, int out_len) | |
1102 | { | |
1103 | struct rdma_ucm_accept cmd; | |
1104 | struct rdma_conn_param conn_param; | |
0cb15372 | 1105 | struct rdma_ucm_ece ece = {}; |
75216638 | 1106 | struct ucma_context *ctx; |
0cb15372 | 1107 | size_t in_size; |
75216638 SH |
1108 | int ret; |
1109 | ||
31142a4b JG |
1110 | if (in_len < offsetofend(typeof(cmd), reserved)) |
1111 | return -EINVAL; | |
0cb15372 LR |
1112 | in_size = min_t(size_t, in_len, sizeof(cmd)); |
1113 | if (copy_from_user(&cmd, inbuf, in_size)) | |
75216638 SH |
1114 | return -EFAULT; |
1115 | ||
8b77586b | 1116 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1117 | if (IS_ERR(ctx)) |
1118 | return PTR_ERR(ctx); | |
1119 | ||
0cb15372 LR |
1120 | if (offsetofend(typeof(cmd), ece) <= in_size) { |
1121 | ece.vendor_id = cmd.ece.vendor_id; | |
1122 | ece.attr_mod = cmd.ece.attr_mod; | |
1123 | } | |
1124 | ||
75216638 | 1125 | if (cmd.conn_param.valid) { |
5c438135 | 1126 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
7c119107 | 1127 | mutex_lock(&ctx->mutex); |
d114c6fe | 1128 | rdma_lock_handler(ctx->cm_id); |
b09c4d70 | 1129 | ret = rdma_accept_ece(ctx->cm_id, &conn_param, &ece); |
d114c6fe JG |
1130 | if (!ret) { |
1131 | /* The uid must be set atomically with the handler */ | |
9ced69ca | 1132 | ctx->uid = cmd.uid; |
d114c6fe JG |
1133 | } |
1134 | rdma_unlock_handler(ctx->cm_id); | |
1135 | mutex_unlock(&ctx->mutex); | |
7c119107 JG |
1136 | } else { |
1137 | mutex_lock(&ctx->mutex); | |
d114c6fe | 1138 | rdma_lock_handler(ctx->cm_id); |
b09c4d70 | 1139 | ret = rdma_accept_ece(ctx->cm_id, NULL, &ece); |
d114c6fe | 1140 | rdma_unlock_handler(ctx->cm_id); |
7c119107 JG |
1141 | mutex_unlock(&ctx->mutex); |
1142 | } | |
75216638 SH |
1143 | ucma_put_ctx(ctx); |
1144 | return ret; | |
1145 | } | |
1146 | ||
1147 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
1148 | int in_len, int out_len) | |
1149 | { | |
1150 | struct rdma_ucm_reject cmd; | |
1151 | struct ucma_context *ctx; | |
1152 | int ret; | |
1153 | ||
1154 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1155 | return -EFAULT; | |
1156 | ||
8094ba0a LR |
1157 | if (!cmd.reason) |
1158 | cmd.reason = IB_CM_REJ_CONSUMER_DEFINED; | |
1159 | ||
1160 | switch (cmd.reason) { | |
1161 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1162 | case IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED: | |
1163 | break; | |
1164 | default: | |
1165 | return -EINVAL; | |
1166 | } | |
1167 | ||
8b77586b | 1168 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1169 | if (IS_ERR(ctx)) |
1170 | return PTR_ERR(ctx); | |
1171 | ||
7c119107 | 1172 | mutex_lock(&ctx->mutex); |
8094ba0a LR |
1173 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len, |
1174 | cmd.reason); | |
7c119107 | 1175 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1176 | ucma_put_ctx(ctx); |
1177 | return ret; | |
1178 | } | |
1179 | ||
1180 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
1181 | int in_len, int out_len) | |
1182 | { | |
1183 | struct rdma_ucm_disconnect cmd; | |
1184 | struct ucma_context *ctx; | |
1185 | int ret; | |
1186 | ||
1187 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1188 | return -EFAULT; | |
1189 | ||
8b77586b | 1190 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1191 | if (IS_ERR(ctx)) |
1192 | return PTR_ERR(ctx); | |
1193 | ||
7c119107 | 1194 | mutex_lock(&ctx->mutex); |
75216638 | 1195 | ret = rdma_disconnect(ctx->cm_id); |
7c119107 | 1196 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1197 | ucma_put_ctx(ctx); |
1198 | return ret; | |
1199 | } | |
1200 | ||
1201 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
1202 | const char __user *inbuf, | |
1203 | int in_len, int out_len) | |
1204 | { | |
1205 | struct rdma_ucm_init_qp_attr cmd; | |
1206 | struct ib_uverbs_qp_attr resp; | |
1207 | struct ucma_context *ctx; | |
1208 | struct ib_qp_attr qp_attr; | |
1209 | int ret; | |
1210 | ||
1211 | if (out_len < sizeof(resp)) | |
1212 | return -ENOSPC; | |
1213 | ||
1214 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1215 | return -EFAULT; | |
1216 | ||
a5880b84 LR |
1217 | if (cmd.qp_state > IB_QPS_ERR) |
1218 | return -EINVAL; | |
1219 | ||
8b77586b | 1220 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1221 | if (IS_ERR(ctx)) |
1222 | return PTR_ERR(ctx); | |
1223 | ||
1224 | resp.qp_attr_mask = 0; | |
1225 | memset(&qp_attr, 0, sizeof qp_attr); | |
1226 | qp_attr.qp_state = cmd.qp_state; | |
7c119107 | 1227 | mutex_lock(&ctx->mutex); |
75216638 | 1228 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); |
7c119107 | 1229 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1230 | if (ret) |
1231 | goto out; | |
1232 | ||
d541e455 | 1233 | ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr); |
6f57c933 | 1234 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
1235 | &resp, sizeof(resp))) |
1236 | ret = -EFAULT; | |
1237 | ||
1238 | out: | |
1239 | ucma_put_ctx(ctx); | |
1240 | return ret; | |
1241 | } | |
1242 | ||
7ce86409 SH |
1243 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
1244 | void *optval, size_t optlen) | |
1245 | { | |
1246 | int ret = 0; | |
1247 | ||
1248 | switch (optname) { | |
1249 | case RDMA_OPTION_ID_TOS: | |
1250 | if (optlen != sizeof(u8)) { | |
1251 | ret = -EINVAL; | |
1252 | break; | |
1253 | } | |
1254 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
1255 | break; | |
a9bb7912 HS |
1256 | case RDMA_OPTION_ID_REUSEADDR: |
1257 | if (optlen != sizeof(int)) { | |
1258 | ret = -EINVAL; | |
1259 | break; | |
1260 | } | |
1261 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1262 | break; | |
68602120 SH |
1263 | case RDMA_OPTION_ID_AFONLY: |
1264 | if (optlen != sizeof(int)) { | |
1265 | ret = -EINVAL; | |
1266 | break; | |
1267 | } | |
1268 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1269 | break; | |
2c1619ed DG |
1270 | case RDMA_OPTION_ID_ACK_TIMEOUT: |
1271 | if (optlen != sizeof(u8)) { | |
1272 | ret = -EINVAL; | |
1273 | break; | |
1274 | } | |
1275 | ret = rdma_set_ack_timeout(ctx->cm_id, *((u8 *)optval)); | |
1276 | break; | |
7ce86409 SH |
1277 | default: |
1278 | ret = -ENOSYS; | |
1279 | } | |
1280 | ||
1281 | return ret; | |
1282 | } | |
1283 | ||
a7ca1f00 SH |
1284 | static int ucma_set_ib_path(struct ucma_context *ctx, |
1285 | struct ib_path_rec_data *path_data, size_t optlen) | |
1286 | { | |
c2f8fc4e | 1287 | struct sa_path_rec sa_path; |
a7ca1f00 SH |
1288 | struct rdma_cm_event event; |
1289 | int ret; | |
1290 | ||
1291 | if (optlen % sizeof(*path_data)) | |
1292 | return -EINVAL; | |
1293 | ||
1294 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
1295 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
1296 | IB_PATH_BIDIRECTIONAL)) | |
1297 | break; | |
1298 | } | |
1299 | ||
1300 | if (!optlen) | |
1301 | return -EINVAL; | |
1302 | ||
8435168d RD |
1303 | if (!ctx->cm_id->device) |
1304 | return -EINVAL; | |
1305 | ||
c2be9dc0 | 1306 | memset(&sa_path, 0, sizeof(sa_path)); |
c2be9dc0 | 1307 | |
57520751 | 1308 | sa_path.rec_type = SA_PATH_REC_TYPE_IB; |
a7ca1f00 | 1309 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
57520751 DC |
1310 | |
1311 | if (rdma_cap_opa_ah(ctx->cm_id->device, ctx->cm_id->port_num)) { | |
1312 | struct sa_path_rec opa; | |
1313 | ||
1314 | sa_convert_path_ib_to_opa(&opa, &sa_path); | |
7c119107 | 1315 | mutex_lock(&ctx->mutex); |
fe75889f | 1316 | ret = rdma_set_ib_path(ctx->cm_id, &opa); |
7c119107 | 1317 | mutex_unlock(&ctx->mutex); |
57520751 | 1318 | } else { |
7c119107 | 1319 | mutex_lock(&ctx->mutex); |
fe75889f | 1320 | ret = rdma_set_ib_path(ctx->cm_id, &sa_path); |
7c119107 | 1321 | mutex_unlock(&ctx->mutex); |
57520751 | 1322 | } |
a7ca1f00 SH |
1323 | if (ret) |
1324 | return ret; | |
1325 | ||
1326 | memset(&event, 0, sizeof event); | |
1327 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1328 | return ucma_event_handler(ctx->cm_id, &event); | |
1329 | } | |
1330 | ||
1331 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
1332 | void *optval, size_t optlen) | |
1333 | { | |
1334 | int ret; | |
1335 | ||
1336 | switch (optname) { | |
1337 | case RDMA_OPTION_IB_PATH: | |
1338 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
1339 | break; | |
1340 | default: | |
1341 | ret = -ENOSYS; | |
1342 | } | |
1343 | ||
1344 | return ret; | |
1345 | } | |
1346 | ||
7ce86409 SH |
1347 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
1348 | int optname, void *optval, size_t optlen) | |
1349 | { | |
1350 | int ret; | |
1351 | ||
1352 | switch (level) { | |
1353 | case RDMA_OPTION_ID: | |
7c119107 | 1354 | mutex_lock(&ctx->mutex); |
7ce86409 | 1355 | ret = ucma_set_option_id(ctx, optname, optval, optlen); |
7c119107 | 1356 | mutex_unlock(&ctx->mutex); |
7ce86409 | 1357 | break; |
a7ca1f00 SH |
1358 | case RDMA_OPTION_IB: |
1359 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
1360 | break; | |
7ce86409 SH |
1361 | default: |
1362 | ret = -ENOSYS; | |
1363 | } | |
1364 | ||
1365 | return ret; | |
1366 | } | |
1367 | ||
1368 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
1369 | int in_len, int out_len) | |
1370 | { | |
1371 | struct rdma_ucm_set_option cmd; | |
1372 | struct ucma_context *ctx; | |
1373 | void *optval; | |
1374 | int ret; | |
1375 | ||
1376 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1377 | return -EFAULT; | |
1378 | ||
ef95a90a SR |
1379 | if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE)) |
1380 | return -EINVAL; | |
1381 | ||
7ce86409 SH |
1382 | ctx = ucma_get_ctx(file, cmd.id); |
1383 | if (IS_ERR(ctx)) | |
1384 | return PTR_ERR(ctx); | |
1385 | ||
6f57c933 | 1386 | optval = memdup_user(u64_to_user_ptr(cmd.optval), |
0764c76e RD |
1387 | cmd.optlen); |
1388 | if (IS_ERR(optval)) { | |
1389 | ret = PTR_ERR(optval); | |
1390 | goto out; | |
7ce86409 SH |
1391 | } |
1392 | ||
1393 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1394 | cmd.optlen); | |
7ce86409 | 1395 | kfree(optval); |
0764c76e RD |
1396 | |
1397 | out: | |
7ce86409 SH |
1398 | ucma_put_ctx(ctx); |
1399 | return ret; | |
1400 | } | |
1401 | ||
75216638 SH |
1402 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1403 | int in_len, int out_len) | |
1404 | { | |
1405 | struct rdma_ucm_notify cmd; | |
1406 | struct ucma_context *ctx; | |
c8d3bcbf | 1407 | int ret = -EINVAL; |
75216638 SH |
1408 | |
1409 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1410 | return -EFAULT; | |
1411 | ||
1412 | ctx = ucma_get_ctx(file, cmd.id); | |
1413 | if (IS_ERR(ctx)) | |
1414 | return PTR_ERR(ctx); | |
1415 | ||
7c119107 | 1416 | mutex_lock(&ctx->mutex); |
c8d3bcbf LR |
1417 | if (ctx->cm_id->device) |
1418 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type)cmd.event); | |
7c119107 | 1419 | mutex_unlock(&ctx->mutex); |
c8d3bcbf | 1420 | |
75216638 SH |
1421 | ucma_put_ctx(ctx); |
1422 | return ret; | |
1423 | } | |
1424 | ||
5bc2b7b3 SH |
1425 | static ssize_t ucma_process_join(struct ucma_file *file, |
1426 | struct rdma_ucm_join_mcast *cmd, int out_len) | |
c8f6a362 | 1427 | { |
c8f6a362 SH |
1428 | struct rdma_ucm_create_id_resp resp; |
1429 | struct ucma_context *ctx; | |
1430 | struct ucma_multicast *mc; | |
5bc2b7b3 | 1431 | struct sockaddr *addr; |
c8f6a362 | 1432 | int ret; |
ab15c95a | 1433 | u8 join_state; |
c8f6a362 SH |
1434 | |
1435 | if (out_len < sizeof(resp)) | |
1436 | return -ENOSPC; | |
1437 | ||
5bc2b7b3 | 1438 | addr = (struct sockaddr *) &cmd->addr; |
0c81ffc6 | 1439 | if (cmd->addr_size != rdma_addr_size(addr)) |
ab15c95a AV |
1440 | return -EINVAL; |
1441 | ||
1442 | if (cmd->join_flags == RDMA_MC_JOIN_FLAG_FULLMEMBER) | |
1443 | join_state = BIT(FULLMEMBER_JOIN); | |
1444 | else if (cmd->join_flags == RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER) | |
1445 | join_state = BIT(SENDONLY_FULLMEMBER_JOIN); | |
1446 | else | |
5bc2b7b3 | 1447 | return -EINVAL; |
c8f6a362 | 1448 | |
8b77586b | 1449 | ctx = ucma_get_ctx_dev(file, cmd->id); |
c8f6a362 SH |
1450 | if (IS_ERR(ctx)) |
1451 | return PTR_ERR(ctx); | |
1452 | ||
95fe5109 | 1453 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); |
6aea938f JB |
1454 | if (!mc) { |
1455 | ret = -ENOMEM; | |
4f680cb9 | 1456 | goto err_put_ctx; |
c8f6a362 | 1457 | } |
95fe5109 JG |
1458 | |
1459 | mc->ctx = ctx; | |
ab15c95a | 1460 | mc->join_state = join_state; |
5bc2b7b3 SH |
1461 | mc->uid = cmd->uid; |
1462 | memcpy(&mc->addr, addr, cmd->addr_size); | |
95fe5109 JG |
1463 | |
1464 | if (xa_alloc(&multicast_table, &mc->id, NULL, xa_limit_32b, | |
1465 | GFP_KERNEL)) { | |
1466 | ret = -ENOMEM; | |
4f680cb9 | 1467 | goto err_free_mc; |
95fe5109 JG |
1468 | } |
1469 | ||
7c119107 | 1470 | mutex_lock(&ctx->mutex); |
ab15c95a AV |
1471 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *)&mc->addr, |
1472 | join_state, mc); | |
7c119107 | 1473 | mutex_unlock(&ctx->mutex); |
c8f6a362 | 1474 | if (ret) |
4f680cb9 | 1475 | goto err_xa_erase; |
c8f6a362 SH |
1476 | |
1477 | resp.id = mc->id; | |
6f57c933 | 1478 | if (copy_to_user(u64_to_user_ptr(cmd->response), |
c8f6a362 SH |
1479 | &resp, sizeof(resp))) { |
1480 | ret = -EFAULT; | |
4f680cb9 | 1481 | goto err_leave_multicast; |
c8f6a362 SH |
1482 | } |
1483 | ||
4dfd5321 | 1484 | xa_store(&multicast_table, mc->id, mc, 0); |
cb2595c1 | 1485 | |
c8f6a362 SH |
1486 | ucma_put_ctx(ctx); |
1487 | return 0; | |
1488 | ||
4f680cb9 | 1489 | err_leave_multicast: |
38e03d09 | 1490 | mutex_lock(&ctx->mutex); |
3f446754 | 1491 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
38e03d09 | 1492 | mutex_unlock(&ctx->mutex); |
c8f6a362 | 1493 | ucma_cleanup_mc_events(mc); |
4f680cb9 | 1494 | err_xa_erase: |
4dfd5321 | 1495 | xa_erase(&multicast_table, mc->id); |
4f680cb9 | 1496 | err_free_mc: |
c8f6a362 | 1497 | kfree(mc); |
4f680cb9 | 1498 | err_put_ctx: |
c8f6a362 SH |
1499 | ucma_put_ctx(ctx); |
1500 | return ret; | |
1501 | } | |
1502 | ||
5bc2b7b3 SH |
1503 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
1504 | const char __user *inbuf, | |
1505 | int in_len, int out_len) | |
1506 | { | |
1507 | struct rdma_ucm_join_ip_mcast cmd; | |
1508 | struct rdma_ucm_join_mcast join_cmd; | |
1509 | ||
1510 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1511 | return -EFAULT; | |
1512 | ||
1513 | join_cmd.response = cmd.response; | |
1514 | join_cmd.uid = cmd.uid; | |
1515 | join_cmd.id = cmd.id; | |
84652aef | 1516 | join_cmd.addr_size = rdma_addr_size_in6(&cmd.addr); |
0c81ffc6 LR |
1517 | if (!join_cmd.addr_size) |
1518 | return -EINVAL; | |
1519 | ||
ab15c95a | 1520 | join_cmd.join_flags = RDMA_MC_JOIN_FLAG_FULLMEMBER; |
5bc2b7b3 SH |
1521 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); |
1522 | ||
1523 | return ucma_process_join(file, &join_cmd, out_len); | |
1524 | } | |
1525 | ||
1526 | static ssize_t ucma_join_multicast(struct ucma_file *file, | |
1527 | const char __user *inbuf, | |
1528 | int in_len, int out_len) | |
1529 | { | |
1530 | struct rdma_ucm_join_mcast cmd; | |
1531 | ||
1532 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1533 | return -EFAULT; | |
1534 | ||
84652aef | 1535 | if (!rdma_addr_size_kss(&cmd.addr)) |
0c81ffc6 LR |
1536 | return -EINVAL; |
1537 | ||
5bc2b7b3 SH |
1538 | return ucma_process_join(file, &cmd, out_len); |
1539 | } | |
1540 | ||
c8f6a362 SH |
1541 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
1542 | const char __user *inbuf, | |
1543 | int in_len, int out_len) | |
1544 | { | |
1545 | struct rdma_ucm_destroy_id cmd; | |
1546 | struct rdma_ucm_destroy_id_resp resp; | |
1547 | struct ucma_multicast *mc; | |
1548 | int ret = 0; | |
1549 | ||
1550 | if (out_len < sizeof(resp)) | |
1551 | return -ENOSPC; | |
1552 | ||
1553 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1554 | return -EFAULT; | |
1555 | ||
4dfd5321 MW |
1556 | xa_lock(&multicast_table); |
1557 | mc = xa_load(&multicast_table, cmd.id); | |
c8f6a362 SH |
1558 | if (!mc) |
1559 | mc = ERR_PTR(-ENOENT); | |
09e328e4 | 1560 | else if (READ_ONCE(mc->ctx->file) != file) |
c8f6a362 | 1561 | mc = ERR_PTR(-EINVAL); |
167b95ec | 1562 | else if (!refcount_inc_not_zero(&mc->ctx->ref)) |
7e967fd0 JG |
1563 | mc = ERR_PTR(-ENXIO); |
1564 | else | |
4dfd5321 MW |
1565 | __xa_erase(&multicast_table, mc->id); |
1566 | xa_unlock(&multicast_table); | |
c8f6a362 SH |
1567 | |
1568 | if (IS_ERR(mc)) { | |
1569 | ret = PTR_ERR(mc); | |
1570 | goto out; | |
1571 | } | |
1572 | ||
7c119107 | 1573 | mutex_lock(&mc->ctx->mutex); |
3f446754 | 1574 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
7c119107 JG |
1575 | mutex_unlock(&mc->ctx->mutex); |
1576 | ||
c8f6a362 | 1577 | ucma_cleanup_mc_events(mc); |
c8f6a362 SH |
1578 | |
1579 | ucma_put_ctx(mc->ctx); | |
1580 | resp.events_reported = mc->events_reported; | |
1581 | kfree(mc); | |
1582 | ||
6f57c933 | 1583 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
c8f6a362 SH |
1584 | &resp, sizeof(resp))) |
1585 | ret = -EFAULT; | |
1586 | out: | |
1587 | return ret; | |
1588 | } | |
1589 | ||
88314e4d SH |
1590 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, |
1591 | const char __user *inbuf, | |
1592 | int in_len, int out_len) | |
1593 | { | |
1594 | struct rdma_ucm_migrate_id cmd; | |
1595 | struct rdma_ucm_migrate_resp resp; | |
f5449e74 | 1596 | struct ucma_event *uevent, *tmp; |
88314e4d | 1597 | struct ucma_context *ctx; |
f5449e74 | 1598 | LIST_HEAD(event_list); |
2903ff01 | 1599 | struct fd f; |
88314e4d SH |
1600 | struct ucma_file *cur_file; |
1601 | int ret = 0; | |
1602 | ||
1603 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1604 | return -EFAULT; | |
1605 | ||
1606 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1607 | f = fdget(cmd.fd); |
1608 | if (!f.file) | |
88314e4d | 1609 | return -ENOENT; |
0d23ba60 JH |
1610 | if (f.file->f_op != &ucma_fops) { |
1611 | ret = -EINVAL; | |
1612 | goto file_put; | |
1613 | } | |
f5449e74 | 1614 | cur_file = f.file->private_data; |
88314e4d SH |
1615 | |
1616 | /* Validate current fd and prevent destruction of id. */ | |
f5449e74 | 1617 | ctx = ucma_get_ctx(cur_file, cmd.id); |
88314e4d SH |
1618 | if (IS_ERR(ctx)) { |
1619 | ret = PTR_ERR(ctx); | |
1620 | goto file_put; | |
1621 | } | |
1622 | ||
09e328e4 | 1623 | rdma_lock_handler(ctx->cm_id); |
88314e4d | 1624 | /* |
f5449e74 JG |
1625 | * ctx->file can only be changed under the handler & xa_lock. xa_load() |
1626 | * must be checked again to ensure the ctx hasn't begun destruction | |
1627 | * since the ucma_get_ctx(). | |
88314e4d | 1628 | */ |
afcafe07 | 1629 | xa_lock(&ctx_table); |
f5449e74 JG |
1630 | if (_ucma_find_context(cmd.id, cur_file) != ctx) { |
1631 | xa_unlock(&ctx_table); | |
1632 | ret = -ENOENT; | |
1633 | goto err_unlock; | |
1634 | } | |
88314e4d | 1635 | ctx->file = new_file; |
f5449e74 JG |
1636 | xa_unlock(&ctx_table); |
1637 | ||
1638 | mutex_lock(&cur_file->mut); | |
1639 | list_del(&ctx->list); | |
1640 | /* | |
1641 | * At this point lock_handler() prevents addition of new uevents for | |
1642 | * this ctx. | |
1643 | */ | |
1644 | list_for_each_entry_safe(uevent, tmp, &cur_file->event_list, list) | |
1645 | if (uevent->ctx == ctx) | |
1646 | list_move_tail(&uevent->list, &event_list); | |
88314e4d | 1647 | resp.events_reported = ctx->events_reported; |
f5449e74 | 1648 | mutex_unlock(&cur_file->mut); |
88314e4d | 1649 | |
f5449e74 JG |
1650 | mutex_lock(&new_file->mut); |
1651 | list_add_tail(&ctx->list, &new_file->ctx_list); | |
1652 | list_splice_tail(&event_list, &new_file->event_list); | |
1653 | mutex_unlock(&new_file->mut); | |
88314e4d | 1654 | |
6f57c933 | 1655 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
88314e4d SH |
1656 | &resp, sizeof(resp))) |
1657 | ret = -EFAULT; | |
1658 | ||
f5449e74 | 1659 | err_unlock: |
09e328e4 | 1660 | rdma_unlock_handler(ctx->cm_id); |
88314e4d SH |
1661 | ucma_put_ctx(ctx); |
1662 | file_put: | |
2903ff01 | 1663 | fdput(f); |
88314e4d SH |
1664 | return ret; |
1665 | } | |
1666 | ||
75216638 SH |
1667 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1668 | const char __user *inbuf, | |
1669 | int in_len, int out_len) = { | |
05ad9457 SH |
1670 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
1671 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1672 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, | |
1673 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, | |
1674 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, | |
1675 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1676 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1677 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1678 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1679 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1680 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1681 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1682 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1683 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
1684 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, | |
1685 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, | |
1686 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, | |
1687 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
1688 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, | |
eebe4c3a | 1689 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
209cf2a7 | 1690 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
5bc2b7b3 SH |
1691 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
1692 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast | |
75216638 SH |
1693 | }; |
1694 | ||
1695 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1696 | size_t len, loff_t *pos) | |
1697 | { | |
1698 | struct ucma_file *file = filp->private_data; | |
1699 | struct rdma_ucm_cmd_hdr hdr; | |
1700 | ssize_t ret; | |
1701 | ||
f73a1dbc LR |
1702 | if (!ib_safe_file_access(filp)) { |
1703 | pr_err_once("ucma_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n", | |
1704 | task_tgid_vnr(current), current->comm); | |
e6bd18f5 | 1705 | return -EACCES; |
f73a1dbc | 1706 | } |
e6bd18f5 | 1707 | |
75216638 SH |
1708 | if (len < sizeof(hdr)) |
1709 | return -EINVAL; | |
1710 | ||
1711 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1712 | return -EFAULT; | |
1713 | ||
caf6e3f2 | 1714 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 | 1715 | return -EINVAL; |
a3671a4f | 1716 | hdr.cmd = array_index_nospec(hdr.cmd, ARRAY_SIZE(ucma_cmd_table)); |
75216638 SH |
1717 | |
1718 | if (hdr.in + sizeof(hdr) > len) | |
1719 | return -EINVAL; | |
1720 | ||
1721 | if (!ucma_cmd_table[hdr.cmd]) | |
1722 | return -ENOSYS; | |
1723 | ||
1724 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1725 | if (!ret) | |
1726 | ret = len; | |
1727 | ||
1728 | return ret; | |
1729 | } | |
1730 | ||
afc9a42b | 1731 | static __poll_t ucma_poll(struct file *filp, struct poll_table_struct *wait) |
75216638 SH |
1732 | { |
1733 | struct ucma_file *file = filp->private_data; | |
afc9a42b | 1734 | __poll_t mask = 0; |
75216638 SH |
1735 | |
1736 | poll_wait(filp, &file->poll_wait, wait); | |
1737 | ||
1738 | if (!list_empty(&file->event_list)) | |
a9a08845 | 1739 | mask = EPOLLIN | EPOLLRDNORM; |
75216638 SH |
1740 | |
1741 | return mask; | |
1742 | } | |
1743 | ||
f7a6117e RD |
1744 | /* |
1745 | * ucma_open() does not need the BKL: | |
1746 | * | |
1747 | * - no global state is referred to; | |
1748 | * - there is no ioctl method to race against; | |
1749 | * - no further module initialization is required for open to work | |
1750 | * after the device is registered. | |
1751 | */ | |
75216638 SH |
1752 | static int ucma_open(struct inode *inode, struct file *filp) |
1753 | { | |
1754 | struct ucma_file *file; | |
1755 | ||
1756 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1757 | if (!file) | |
1758 | return -ENOMEM; | |
1759 | ||
1760 | INIT_LIST_HEAD(&file->event_list); | |
1761 | INIT_LIST_HEAD(&file->ctx_list); | |
1762 | init_waitqueue_head(&file->poll_wait); | |
1763 | mutex_init(&file->mut); | |
1764 | ||
1765 | filp->private_data = file; | |
1766 | file->filp = filp; | |
bc1db9af | 1767 | |
c5bf68fe | 1768 | return stream_open(inode, filp); |
75216638 SH |
1769 | } |
1770 | ||
1771 | static int ucma_close(struct inode *inode, struct file *filp) | |
1772 | { | |
1773 | struct ucma_file *file = filp->private_data; | |
75216638 | 1774 | |
07e266a7 | 1775 | /* |
a1d33b70 JG |
1776 | * All paths that touch ctx_list or ctx_list starting from write() are |
1777 | * prevented by this being a FD release function. The list_add_tail() in | |
1778 | * ucma_connect_event_handler() can run concurrently, however it only | |
1779 | * adds to the list *after* a listening ID. By only reading the first of | |
1780 | * the list, and relying on __destroy_id() to block | |
1781 | * ucma_connect_event_handler(), no additional locking is needed. | |
07e266a7 | 1782 | */ |
a1d33b70 JG |
1783 | while (!list_empty(&file->ctx_list)) { |
1784 | struct ucma_context *ctx = list_first_entry( | |
1785 | &file->ctx_list, struct ucma_context, list); | |
1786 | ||
07e266a7 | 1787 | xa_erase(&ctx_table, ctx->id); |
c07e12d8 | 1788 | __destroy_id(ctx); |
75216638 | 1789 | } |
75216638 SH |
1790 | kfree(file); |
1791 | return 0; | |
1792 | } | |
1793 | ||
2b8693c0 | 1794 | static const struct file_operations ucma_fops = { |
75216638 SH |
1795 | .owner = THIS_MODULE, |
1796 | .open = ucma_open, | |
1797 | .release = ucma_close, | |
1798 | .write = ucma_write, | |
1799 | .poll = ucma_poll, | |
bc1db9af | 1800 | .llseek = no_llseek, |
75216638 SH |
1801 | }; |
1802 | ||
1803 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1804 | .minor = MISC_DYNAMIC_MINOR, |
1805 | .name = "rdma_cm", | |
1806 | .nodename = "infiniband/rdma_cm", | |
1807 | .mode = 0666, | |
1808 | .fops = &ucma_fops, | |
75216638 SH |
1809 | }; |
1810 | ||
8f71bb00 JG |
1811 | static int ucma_get_global_nl_info(struct ib_client_nl_info *res) |
1812 | { | |
1813 | res->abi = RDMA_USER_CM_ABI_VERSION; | |
1814 | res->cdev = ucma_misc.this_device; | |
1815 | return 0; | |
1816 | } | |
1817 | ||
1818 | static struct ib_client rdma_cma_client = { | |
1819 | .name = "rdma_cm", | |
1820 | .get_global_nl_info = ucma_get_global_nl_info, | |
1821 | }; | |
1822 | MODULE_ALIAS_RDMA_CLIENT("rdma_cm"); | |
1823 | ||
75216638 SH |
1824 | static ssize_t show_abi_version(struct device *dev, |
1825 | struct device_attribute *attr, | |
1826 | char *buf) | |
1827 | { | |
1828 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1829 | } | |
1830 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1831 | ||
1832 | static int __init ucma_init(void) | |
1833 | { | |
1834 | int ret; | |
1835 | ||
1836 | ret = misc_register(&ucma_misc); | |
1837 | if (ret) | |
1838 | return ret; | |
1839 | ||
1840 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1841 | if (ret) { | |
aba25a3e | 1842 | pr_err("rdma_ucm: couldn't create abi_version attr\n"); |
97cb7e40 SW |
1843 | goto err1; |
1844 | } | |
1845 | ||
ec8f23ce | 1846 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 | 1847 | if (!ucma_ctl_table_hdr) { |
aba25a3e | 1848 | pr_err("rdma_ucm: couldn't register sysctl paths\n"); |
97cb7e40 SW |
1849 | ret = -ENOMEM; |
1850 | goto err2; | |
75216638 | 1851 | } |
8f71bb00 JG |
1852 | |
1853 | ret = ib_register_client(&rdma_cma_client); | |
1854 | if (ret) | |
1855 | goto err3; | |
1856 | ||
75216638 | 1857 | return 0; |
8f71bb00 JG |
1858 | err3: |
1859 | unregister_net_sysctl_table(ucma_ctl_table_hdr); | |
97cb7e40 SW |
1860 | err2: |
1861 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1862 | err1: | |
75216638 SH |
1863 | misc_deregister(&ucma_misc); |
1864 | return ret; | |
1865 | } | |
1866 | ||
1867 | static void __exit ucma_cleanup(void) | |
1868 | { | |
8f71bb00 | 1869 | ib_unregister_client(&rdma_cma_client); |
5dd3df10 | 1870 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1871 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1872 | misc_deregister(&ucma_misc); | |
75216638 SH |
1873 | } |
1874 | ||
1875 | module_init(ucma_init); | |
1876 | module_exit(ucma_cleanup); |