]>
Commit | Line | Data |
---|---|---|
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 SH |
90 | int events_reported; |
91 | int backlog; | |
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; | |
c8f6a362 | 99 | struct list_head mc_list; |
e1c30298 | 100 | /* mark that device is in process of destroying the internal HW |
afcafe07 | 101 | * resources, protected by the ctx_table lock |
e1c30298 YH |
102 | */ |
103 | int closing; | |
104 | /* sync between removal event and id destroy, protected by file mut */ | |
105 | int destroying; | |
106 | struct work_struct close_work; | |
c8f6a362 SH |
107 | }; |
108 | ||
109 | struct ucma_multicast { | |
110 | struct ucma_context *ctx; | |
4dfd5321 | 111 | u32 id; |
c8f6a362 SH |
112 | int events_reported; |
113 | ||
114 | u64 uid; | |
ab15c95a | 115 | u8 join_state; |
c8f6a362 | 116 | struct list_head list; |
3f446754 | 117 | struct sockaddr_storage addr; |
75216638 SH |
118 | }; |
119 | ||
120 | struct ucma_event { | |
121 | struct ucma_context *ctx; | |
c8f6a362 | 122 | struct ucma_multicast *mc; |
75216638 SH |
123 | struct list_head list; |
124 | struct rdma_cm_id *cm_id; | |
125 | struct rdma_ucm_event_resp resp; | |
e1c30298 | 126 | struct work_struct close_work; |
75216638 SH |
127 | }; |
128 | ||
afcafe07 | 129 | static DEFINE_XARRAY_ALLOC(ctx_table); |
4dfd5321 | 130 | static DEFINE_XARRAY_ALLOC(multicast_table); |
75216638 | 131 | |
0d23ba60 JH |
132 | static const struct file_operations ucma_fops; |
133 | ||
75216638 SH |
134 | static inline struct ucma_context *_ucma_find_context(int id, |
135 | struct ucma_file *file) | |
136 | { | |
137 | struct ucma_context *ctx; | |
138 | ||
afcafe07 | 139 | ctx = xa_load(&ctx_table, id); |
75216638 SH |
140 | if (!ctx) |
141 | ctx = ERR_PTR(-ENOENT); | |
e8980d67 | 142 | else if (ctx->file != file || !ctx->cm_id) |
75216638 SH |
143 | ctx = ERR_PTR(-EINVAL); |
144 | return ctx; | |
145 | } | |
146 | ||
147 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
148 | { | |
149 | struct ucma_context *ctx; | |
150 | ||
afcafe07 | 151 | xa_lock(&ctx_table); |
75216638 | 152 | ctx = _ucma_find_context(id, file); |
e1c30298 YH |
153 | if (!IS_ERR(ctx)) { |
154 | if (ctx->closing) | |
155 | ctx = ERR_PTR(-EIO); | |
156 | else | |
167b95ec | 157 | refcount_inc(&ctx->ref); |
e1c30298 | 158 | } |
afcafe07 | 159 | xa_unlock(&ctx_table); |
75216638 SH |
160 | return ctx; |
161 | } | |
162 | ||
163 | static void ucma_put_ctx(struct ucma_context *ctx) | |
164 | { | |
167b95ec | 165 | if (refcount_dec_and_test(&ctx->ref)) |
75216638 SH |
166 | complete(&ctx->comp); |
167 | } | |
168 | ||
8b77586b JG |
169 | /* |
170 | * Same as ucm_get_ctx but requires that ->cm_id->device is valid, eg that the | |
171 | * CM_ID is bound. | |
172 | */ | |
173 | static struct ucma_context *ucma_get_ctx_dev(struct ucma_file *file, int id) | |
174 | { | |
175 | struct ucma_context *ctx = ucma_get_ctx(file, id); | |
176 | ||
177 | if (IS_ERR(ctx)) | |
178 | return ctx; | |
179 | if (!ctx->cm_id->device) { | |
180 | ucma_put_ctx(ctx); | |
181 | return ERR_PTR(-EINVAL); | |
182 | } | |
183 | return ctx; | |
184 | } | |
185 | ||
e1c30298 YH |
186 | static void ucma_close_event_id(struct work_struct *work) |
187 | { | |
188 | struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work); | |
189 | ||
190 | rdma_destroy_id(uevent_close->cm_id); | |
191 | kfree(uevent_close); | |
192 | } | |
193 | ||
194 | static void ucma_close_id(struct work_struct *work) | |
195 | { | |
196 | struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); | |
197 | ||
198 | /* once all inflight tasks are finished, we close all underlying | |
199 | * resources. The context is still alive till its explicit destryoing | |
200 | * by its creator. | |
201 | */ | |
202 | ucma_put_ctx(ctx); | |
203 | wait_for_completion(&ctx->comp); | |
204 | /* No new events will be generated after destroying the id. */ | |
205 | rdma_destroy_id(ctx->cm_id); | |
206 | } | |
207 | ||
75216638 SH |
208 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
209 | { | |
210 | struct ucma_context *ctx; | |
75216638 SH |
211 | |
212 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
213 | if (!ctx) | |
214 | return NULL; | |
215 | ||
e1c30298 | 216 | INIT_WORK(&ctx->close_work, ucma_close_id); |
167b95ec | 217 | refcount_set(&ctx->ref, 1); |
75216638 | 218 | init_completion(&ctx->comp); |
c8f6a362 | 219 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 | 220 | ctx->file = file; |
7c119107 | 221 | mutex_init(&ctx->mutex); |
75216638 | 222 | |
afcafe07 | 223 | if (xa_alloc(&ctx_table, &ctx->id, ctx, xa_limit_32b, GFP_KERNEL)) |
75216638 SH |
224 | goto error; |
225 | ||
226 | list_add_tail(&ctx->list, &file->ctx_list); | |
227 | return ctx; | |
228 | ||
229 | error: | |
230 | kfree(ctx); | |
231 | return NULL; | |
232 | } | |
233 | ||
c8f6a362 SH |
234 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
235 | { | |
236 | struct ucma_multicast *mc; | |
c8f6a362 SH |
237 | |
238 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
239 | if (!mc) | |
240 | return NULL; | |
241 | ||
4dfd5321 MW |
242 | mc->ctx = ctx; |
243 | if (xa_alloc(&multicast_table, &mc->id, NULL, xa_limit_32b, GFP_KERNEL)) | |
c8f6a362 SH |
244 | goto error; |
245 | ||
c8f6a362 SH |
246 | list_add_tail(&mc->list, &ctx->mc_list); |
247 | return mc; | |
248 | ||
249 | error: | |
250 | kfree(mc); | |
251 | return NULL; | |
252 | } | |
253 | ||
75216638 SH |
254 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
255 | struct rdma_conn_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; | |
261 | dst->responder_resources =src->responder_resources; | |
262 | dst->initiator_depth = src->initiator_depth; | |
263 | dst->flow_control = src->flow_control; | |
264 | dst->retry_count = src->retry_count; | |
265 | dst->rnr_retry_count = src->rnr_retry_count; | |
266 | dst->srq = src->srq; | |
267 | dst->qp_num = src->qp_num; | |
268 | } | |
269 | ||
d541e455 DC |
270 | static void ucma_copy_ud_event(struct ib_device *device, |
271 | struct rdma_ucm_ud_param *dst, | |
75216638 SH |
272 | struct rdma_ud_param *src) |
273 | { | |
274 | if (src->private_data_len) | |
275 | memcpy(dst->private_data, src->private_data, | |
276 | src->private_data_len); | |
277 | dst->private_data_len = src->private_data_len; | |
d541e455 | 278 | ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr); |
75216638 SH |
279 | dst->qp_num = src->qp_num; |
280 | dst->qkey = src->qkey; | |
281 | } | |
282 | ||
283 | static void ucma_set_event_context(struct ucma_context *ctx, | |
284 | struct rdma_cm_event *event, | |
285 | struct ucma_event *uevent) | |
286 | { | |
287 | uevent->ctx = ctx; | |
c8f6a362 SH |
288 | switch (event->event) { |
289 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
290 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
291 | uevent->mc = (struct ucma_multicast *) | |
292 | event->param.ud.private_data; | |
293 | uevent->resp.uid = uevent->mc->uid; | |
294 | uevent->resp.id = uevent->mc->id; | |
295 | break; | |
296 | default: | |
297 | uevent->resp.uid = ctx->uid; | |
298 | uevent->resp.id = ctx->id; | |
299 | break; | |
300 | } | |
75216638 SH |
301 | } |
302 | ||
e1c30298 YH |
303 | /* Called with file->mut locked for the relevant context. */ |
304 | static void ucma_removal_event_handler(struct rdma_cm_id *cm_id) | |
305 | { | |
306 | struct ucma_context *ctx = cm_id->context; | |
307 | struct ucma_event *con_req_eve; | |
308 | int event_found = 0; | |
309 | ||
310 | if (ctx->destroying) | |
311 | return; | |
312 | ||
313 | /* only if context is pointing to cm_id that it owns it and can be | |
314 | * queued to be closed, otherwise that cm_id is an inflight one that | |
315 | * is part of that context event list pending to be detached and | |
316 | * reattached to its new context as part of ucma_get_event, | |
317 | * handled separately below. | |
318 | */ | |
319 | if (ctx->cm_id == cm_id) { | |
afcafe07 | 320 | xa_lock(&ctx_table); |
e1c30298 | 321 | ctx->closing = 1; |
afcafe07 | 322 | xa_unlock(&ctx_table); |
e1c30298 YH |
323 | queue_work(ctx->file->close_wq, &ctx->close_work); |
324 | return; | |
325 | } | |
326 | ||
327 | list_for_each_entry(con_req_eve, &ctx->file->event_list, list) { | |
328 | if (con_req_eve->cm_id == cm_id && | |
329 | con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
330 | list_del(&con_req_eve->list); | |
331 | INIT_WORK(&con_req_eve->close_work, ucma_close_event_id); | |
332 | queue_work(ctx->file->close_wq, &con_req_eve->close_work); | |
333 | event_found = 1; | |
334 | break; | |
335 | } | |
336 | } | |
337 | if (!event_found) | |
aba25a3e | 338 | pr_err("ucma_removal_event_handler: warning: connect request event wasn't found\n"); |
e1c30298 YH |
339 | } |
340 | ||
75216638 SH |
341 | static int ucma_event_handler(struct rdma_cm_id *cm_id, |
342 | struct rdma_cm_event *event) | |
343 | { | |
344 | struct ucma_event *uevent; | |
345 | struct ucma_context *ctx = cm_id->context; | |
346 | int ret = 0; | |
347 | ||
348 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
349 | if (!uevent) | |
350 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
351 | ||
418edaab | 352 | mutex_lock(&ctx->file->mut); |
75216638 SH |
353 | uevent->cm_id = cm_id; |
354 | ucma_set_event_context(ctx, event, uevent); | |
355 | uevent->resp.event = event->event; | |
356 | uevent->resp.status = event->status; | |
638ef7a6 | 357 | if (cm_id->qp_type == IB_QPT_UD) |
d541e455 DC |
358 | ucma_copy_ud_event(cm_id->device, &uevent->resp.param.ud, |
359 | &event->param.ud); | |
75216638 SH |
360 | else |
361 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
362 | &event->param.conn); | |
363 | ||
93531ee7 LR |
364 | uevent->resp.ece.vendor_id = event->ece.vendor_id; |
365 | uevent->resp.ece.attr_mod = event->ece.attr_mod; | |
366 | ||
75216638 SH |
367 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
368 | if (!ctx->backlog) { | |
3492856e | 369 | ret = -ENOMEM; |
30a5ec98 | 370 | kfree(uevent); |
75216638 SH |
371 | goto out; |
372 | } | |
373 | ctx->backlog--; | |
c6b21824 | 374 | } else if (!ctx->uid || ctx->cm_id != cm_id) { |
0cefcf0b SH |
375 | /* |
376 | * We ignore events for new connections until userspace has set | |
377 | * their context. This can only happen if an error occurs on a | |
378 | * new connection before the user accepts it. This is okay, | |
e1c30298 YH |
379 | * since the accept will just fail later. However, we do need |
380 | * to release the underlying HW resources in case of a device | |
381 | * removal event. | |
0cefcf0b | 382 | */ |
e1c30298 YH |
383 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
384 | ucma_removal_event_handler(cm_id); | |
385 | ||
0cefcf0b SH |
386 | kfree(uevent); |
387 | goto out; | |
75216638 | 388 | } |
0cefcf0b | 389 | |
75216638 SH |
390 | list_add_tail(&uevent->list, &ctx->file->event_list); |
391 | wake_up_interruptible(&ctx->file->poll_wait); | |
e1c30298 YH |
392 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
393 | ucma_removal_event_handler(cm_id); | |
75216638 SH |
394 | out: |
395 | mutex_unlock(&ctx->file->mut); | |
396 | return ret; | |
397 | } | |
398 | ||
399 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
400 | int in_len, int out_len) | |
401 | { | |
402 | struct ucma_context *ctx; | |
403 | struct rdma_ucm_get_event cmd; | |
404 | struct ucma_event *uevent; | |
405 | int ret = 0; | |
75216638 | 406 | |
611cb92b JG |
407 | /* |
408 | * Old 32 bit user space does not send the 4 byte padding in the | |
409 | * reserved field. We don't care, allow it to keep working. | |
410 | */ | |
93531ee7 LR |
411 | if (out_len < sizeof(uevent->resp) - sizeof(uevent->resp.reserved) - |
412 | sizeof(uevent->resp.ece)) | |
75216638 SH |
413 | return -ENOSPC; |
414 | ||
415 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
416 | return -EFAULT; | |
417 | ||
418 | mutex_lock(&file->mut); | |
419 | while (list_empty(&file->event_list)) { | |
d92f7644 | 420 | mutex_unlock(&file->mut); |
75216638 | 421 | |
d92f7644 SH |
422 | if (file->filp->f_flags & O_NONBLOCK) |
423 | return -EAGAIN; | |
424 | ||
425 | if (wait_event_interruptible(file->poll_wait, | |
426 | !list_empty(&file->event_list))) | |
427 | return -ERESTARTSYS; | |
75216638 | 428 | |
75216638 | 429 | mutex_lock(&file->mut); |
75216638 SH |
430 | } |
431 | ||
75216638 SH |
432 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
433 | ||
434 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
435 | ctx = ucma_alloc_ctx(file); | |
436 | if (!ctx) { | |
437 | ret = -ENOMEM; | |
438 | goto done; | |
439 | } | |
440 | uevent->ctx->backlog++; | |
441 | ctx->cm_id = uevent->cm_id; | |
442 | ctx->cm_id->context = ctx; | |
443 | uevent->resp.id = ctx->id; | |
444 | } | |
445 | ||
6f57c933 | 446 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
611cb92b JG |
447 | &uevent->resp, |
448 | min_t(size_t, out_len, sizeof(uevent->resp)))) { | |
75216638 SH |
449 | ret = -EFAULT; |
450 | goto done; | |
451 | } | |
452 | ||
453 | list_del(&uevent->list); | |
454 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
455 | if (uevent->mc) |
456 | uevent->mc->events_reported++; | |
75216638 SH |
457 | kfree(uevent); |
458 | done: | |
459 | mutex_unlock(&file->mut); | |
460 | return ret; | |
461 | } | |
462 | ||
b26f9b99 SH |
463 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
464 | { | |
465 | switch (cmd->ps) { | |
466 | case RDMA_PS_TCP: | |
467 | *qp_type = IB_QPT_RC; | |
468 | return 0; | |
469 | case RDMA_PS_UDP: | |
470 | case RDMA_PS_IPOIB: | |
471 | *qp_type = IB_QPT_UD; | |
472 | return 0; | |
638ef7a6 SH |
473 | case RDMA_PS_IB: |
474 | *qp_type = cmd->qp_type; | |
475 | return 0; | |
b26f9b99 SH |
476 | default: |
477 | return -EINVAL; | |
478 | } | |
479 | } | |
480 | ||
481 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
482 | int in_len, int out_len) | |
75216638 SH |
483 | { |
484 | struct rdma_ucm_create_id cmd; | |
485 | struct rdma_ucm_create_id_resp resp; | |
486 | struct ucma_context *ctx; | |
e8980d67 | 487 | struct rdma_cm_id *cm_id; |
b26f9b99 | 488 | enum ib_qp_type qp_type; |
75216638 SH |
489 | int ret; |
490 | ||
491 | if (out_len < sizeof(resp)) | |
492 | return -ENOSPC; | |
493 | ||
494 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
495 | return -EFAULT; | |
496 | ||
b26f9b99 SH |
497 | ret = ucma_get_qp_type(&cmd, &qp_type); |
498 | if (ret) | |
499 | return ret; | |
500 | ||
75216638 SH |
501 | mutex_lock(&file->mut); |
502 | ctx = ucma_alloc_ctx(file); | |
503 | mutex_unlock(&file->mut); | |
504 | if (!ctx) | |
505 | return -ENOMEM; | |
506 | ||
507 | ctx->uid = cmd.uid; | |
19fd08b8 LT |
508 | cm_id = __rdma_create_id(current->nsproxy->net_ns, |
509 | ucma_event_handler, ctx, cmd.ps, qp_type, NULL); | |
e8980d67 LR |
510 | if (IS_ERR(cm_id)) { |
511 | ret = PTR_ERR(cm_id); | |
75216638 SH |
512 | goto err1; |
513 | } | |
514 | ||
515 | resp.id = ctx->id; | |
6f57c933 | 516 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
517 | &resp, sizeof(resp))) { |
518 | ret = -EFAULT; | |
519 | goto err2; | |
520 | } | |
e8980d67 LR |
521 | |
522 | ctx->cm_id = cm_id; | |
75216638 SH |
523 | return 0; |
524 | ||
525 | err2: | |
e8980d67 | 526 | rdma_destroy_id(cm_id); |
75216638 | 527 | err1: |
afcafe07 | 528 | xa_erase(&ctx_table, ctx->id); |
ed65a4dc LR |
529 | mutex_lock(&file->mut); |
530 | list_del(&ctx->list); | |
531 | mutex_unlock(&file->mut); | |
75216638 SH |
532 | kfree(ctx); |
533 | return ret; | |
534 | } | |
535 | ||
c8f6a362 SH |
536 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
537 | { | |
538 | struct ucma_multicast *mc, *tmp; | |
539 | ||
afcafe07 | 540 | mutex_lock(&ctx->file->mut); |
c8f6a362 SH |
541 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { |
542 | list_del(&mc->list); | |
4dfd5321 | 543 | xa_erase(&multicast_table, mc->id); |
c8f6a362 SH |
544 | kfree(mc); |
545 | } | |
afcafe07 | 546 | mutex_unlock(&ctx->file->mut); |
c8f6a362 SH |
547 | } |
548 | ||
c8f6a362 SH |
549 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
550 | { | |
551 | struct ucma_event *uevent, *tmp; | |
552 | ||
553 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
554 | if (uevent->mc != mc) | |
555 | continue; | |
556 | ||
557 | list_del(&uevent->list); | |
558 | kfree(uevent); | |
559 | } | |
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 SH |
588 | list_del(&ctx->list); |
589 | mutex_unlock(&ctx->file->mut); | |
590 | ||
186834b5 HS |
591 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
592 | list_del(&uevent->list); | |
593 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
594 | rdma_destroy_id(uevent->cm_id); | |
595 | kfree(uevent); | |
596 | } | |
597 | ||
75216638 | 598 | events_reported = ctx->events_reported; |
7c119107 | 599 | mutex_destroy(&ctx->mutex); |
75216638 SH |
600 | kfree(ctx); |
601 | return events_reported; | |
602 | } | |
603 | ||
604 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
605 | int in_len, int out_len) | |
606 | { | |
607 | struct rdma_ucm_destroy_id cmd; | |
608 | struct rdma_ucm_destroy_id_resp resp; | |
609 | struct ucma_context *ctx; | |
610 | int ret = 0; | |
611 | ||
612 | if (out_len < sizeof(resp)) | |
613 | return -ENOSPC; | |
614 | ||
615 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
616 | return -EFAULT; | |
617 | ||
afcafe07 | 618 | xa_lock(&ctx_table); |
75216638 SH |
619 | ctx = _ucma_find_context(cmd.id, file); |
620 | if (!IS_ERR(ctx)) | |
afcafe07 MW |
621 | __xa_erase(&ctx_table, ctx->id); |
622 | xa_unlock(&ctx_table); | |
75216638 SH |
623 | |
624 | if (IS_ERR(ctx)) | |
625 | return PTR_ERR(ctx); | |
626 | ||
e1c30298 YH |
627 | mutex_lock(&ctx->file->mut); |
628 | ctx->destroying = 1; | |
629 | mutex_unlock(&ctx->file->mut); | |
630 | ||
631 | flush_workqueue(ctx->file->close_wq); | |
632 | /* At this point it's guaranteed that there is no inflight | |
633 | * closing task */ | |
afcafe07 | 634 | xa_lock(&ctx_table); |
e1c30298 | 635 | if (!ctx->closing) { |
afcafe07 | 636 | xa_unlock(&ctx_table); |
e1c30298 YH |
637 | ucma_put_ctx(ctx); |
638 | wait_for_completion(&ctx->comp); | |
639 | rdma_destroy_id(ctx->cm_id); | |
640 | } else { | |
afcafe07 | 641 | xa_unlock(&ctx_table); |
e1c30298 | 642 | } |
75216638 | 643 | |
e1c30298 | 644 | resp.events_reported = ucma_free_ctx(ctx); |
6f57c933 | 645 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
646 | &resp, sizeof(resp))) |
647 | ret = -EFAULT; | |
648 | ||
649 | return ret; | |
650 | } | |
651 | ||
05ad9457 | 652 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
75216638 SH |
653 | int in_len, int out_len) |
654 | { | |
05ad9457 | 655 | struct rdma_ucm_bind_ip cmd; |
75216638 SH |
656 | struct ucma_context *ctx; |
657 | int ret; | |
658 | ||
659 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
660 | return -EFAULT; | |
661 | ||
84652aef RD |
662 | if (!rdma_addr_size_in6(&cmd.addr)) |
663 | return -EINVAL; | |
664 | ||
75216638 SH |
665 | ctx = ucma_get_ctx(file, cmd.id); |
666 | if (IS_ERR(ctx)) | |
667 | return PTR_ERR(ctx); | |
668 | ||
7c119107 | 669 | mutex_lock(&ctx->mutex); |
75216638 | 670 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
7c119107 JG |
671 | mutex_unlock(&ctx->mutex); |
672 | ||
75216638 SH |
673 | ucma_put_ctx(ctx); |
674 | return ret; | |
675 | } | |
676 | ||
eebe4c3a SH |
677 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
678 | int in_len, int out_len) | |
679 | { | |
680 | struct rdma_ucm_bind cmd; | |
eebe4c3a SH |
681 | struct ucma_context *ctx; |
682 | int ret; | |
683 | ||
684 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
685 | return -EFAULT; | |
686 | ||
84652aef RD |
687 | if (cmd.reserved || !cmd.addr_size || |
688 | cmd.addr_size != rdma_addr_size_kss(&cmd.addr)) | |
eebe4c3a SH |
689 | return -EINVAL; |
690 | ||
691 | ctx = ucma_get_ctx(file, cmd.id); | |
692 | if (IS_ERR(ctx)) | |
693 | return PTR_ERR(ctx); | |
694 | ||
7c119107 | 695 | mutex_lock(&ctx->mutex); |
84652aef | 696 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
7c119107 | 697 | mutex_unlock(&ctx->mutex); |
eebe4c3a SH |
698 | ucma_put_ctx(ctx); |
699 | return ret; | |
700 | } | |
701 | ||
05ad9457 SH |
702 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
703 | const char __user *inbuf, | |
704 | int in_len, int out_len) | |
75216638 | 705 | { |
05ad9457 | 706 | struct rdma_ucm_resolve_ip cmd; |
75216638 SH |
707 | struct ucma_context *ctx; |
708 | int ret; | |
709 | ||
710 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
711 | return -EFAULT; | |
712 | ||
09abfe7b | 713 | if ((cmd.src_addr.sin6_family && !rdma_addr_size_in6(&cmd.src_addr)) || |
84652aef | 714 | !rdma_addr_size_in6(&cmd.dst_addr)) |
2975d5de LR |
715 | return -EINVAL; |
716 | ||
75216638 SH |
717 | ctx = ucma_get_ctx(file, cmd.id); |
718 | if (IS_ERR(ctx)) | |
719 | return PTR_ERR(ctx); | |
720 | ||
7c119107 | 721 | mutex_lock(&ctx->mutex); |
84652aef RD |
722 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
723 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
7c119107 | 724 | mutex_unlock(&ctx->mutex); |
75216638 SH |
725 | ucma_put_ctx(ctx); |
726 | return ret; | |
727 | } | |
728 | ||
209cf2a7 SH |
729 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
730 | const char __user *inbuf, | |
731 | int in_len, int out_len) | |
732 | { | |
733 | struct rdma_ucm_resolve_addr cmd; | |
209cf2a7 SH |
734 | struct ucma_context *ctx; |
735 | int ret; | |
736 | ||
737 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
738 | return -EFAULT; | |
739 | ||
84652aef RD |
740 | if (cmd.reserved || |
741 | (cmd.src_size && (cmd.src_size != rdma_addr_size_kss(&cmd.src_addr))) || | |
742 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size_kss(&cmd.dst_addr))) | |
209cf2a7 SH |
743 | return -EINVAL; |
744 | ||
745 | ctx = ucma_get_ctx(file, cmd.id); | |
746 | if (IS_ERR(ctx)) | |
747 | return PTR_ERR(ctx); | |
748 | ||
7c119107 | 749 | mutex_lock(&ctx->mutex); |
84652aef RD |
750 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
751 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
7c119107 | 752 | mutex_unlock(&ctx->mutex); |
209cf2a7 SH |
753 | ucma_put_ctx(ctx); |
754 | return ret; | |
755 | } | |
756 | ||
75216638 SH |
757 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
758 | const char __user *inbuf, | |
759 | int in_len, int out_len) | |
760 | { | |
761 | struct rdma_ucm_resolve_route cmd; | |
762 | struct ucma_context *ctx; | |
763 | int ret; | |
764 | ||
765 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
766 | return -EFAULT; | |
767 | ||
8b77586b | 768 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
769 | if (IS_ERR(ctx)) |
770 | return PTR_ERR(ctx); | |
771 | ||
7c119107 | 772 | mutex_lock(&ctx->mutex); |
75216638 | 773 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); |
7c119107 | 774 | mutex_unlock(&ctx->mutex); |
75216638 SH |
775 | ucma_put_ctx(ctx); |
776 | return ret; | |
777 | } | |
778 | ||
779 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
780 | struct rdma_route *route) | |
781 | { | |
782 | struct rdma_dev_addr *dev_addr; | |
783 | ||
784 | resp->num_paths = route->num_paths; | |
785 | switch (route->num_paths) { | |
786 | case 0: | |
787 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
788 | rdma_addr_get_dgid(dev_addr, |
789 | (union ib_gid *) &resp->ib_route[0].dgid); | |
790 | rdma_addr_get_sgid(dev_addr, | |
791 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
792 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
793 | break; | |
794 | case 2: | |
795 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
796 | &route->path_rec[1]); | |
797 | /* fall through */ | |
798 | case 1: | |
799 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
800 | &route->path_rec[0]); | |
801 | break; | |
802 | default: | |
803 | break; | |
804 | } | |
805 | } | |
806 | ||
3c86aa70 EC |
807 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
808 | struct rdma_route *route) | |
809 | { | |
3c86aa70 EC |
810 | |
811 | resp->num_paths = route->num_paths; | |
812 | switch (route->num_paths) { | |
813 | case 0: | |
7b85627b MS |
814 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
815 | (union ib_gid *)&resp->ib_route[0].dgid); | |
816 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, | |
817 | (union ib_gid *)&resp->ib_route[0].sgid); | |
3c86aa70 EC |
818 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
819 | break; | |
820 | case 2: | |
821 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
822 | &route->path_rec[1]); | |
823 | /* fall through */ | |
824 | case 1: | |
825 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
826 | &route->path_rec[0]); | |
827 | break; | |
828 | default: | |
829 | break; | |
830 | } | |
831 | } | |
832 | ||
e86f8b06 SW |
833 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
834 | struct rdma_route *route) | |
835 | { | |
836 | struct rdma_dev_addr *dev_addr; | |
837 | ||
838 | dev_addr = &route->addr.dev_addr; | |
839 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
840 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
841 | } | |
842 | ||
75216638 SH |
843 | static ssize_t ucma_query_route(struct ucma_file *file, |
844 | const char __user *inbuf, | |
845 | int in_len, int out_len) | |
846 | { | |
ee7aed45 | 847 | struct rdma_ucm_query cmd; |
75216638 SH |
848 | struct rdma_ucm_query_route_resp resp; |
849 | struct ucma_context *ctx; | |
850 | struct sockaddr *addr; | |
851 | int ret = 0; | |
852 | ||
17793833 | 853 | if (out_len < offsetof(struct rdma_ucm_query_route_resp, ibdev_index)) |
75216638 SH |
854 | return -ENOSPC; |
855 | ||
856 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
857 | return -EFAULT; | |
858 | ||
859 | ctx = ucma_get_ctx(file, cmd.id); | |
860 | if (IS_ERR(ctx)) | |
861 | return PTR_ERR(ctx); | |
862 | ||
7c119107 | 863 | mutex_lock(&ctx->mutex); |
75216638 | 864 | memset(&resp, 0, sizeof resp); |
3f446754 | 865 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
866 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
867 | sizeof(struct sockaddr_in) : | |
868 | sizeof(struct sockaddr_in6)); | |
3f446754 | 869 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
870 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
871 | sizeof(struct sockaddr_in) : | |
872 | sizeof(struct sockaddr_in6)); | |
873 | if (!ctx->cm_id->device) | |
874 | goto out; | |
875 | ||
9cda779c | 876 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
17793833 | 877 | resp.ibdev_index = ctx->cm_id->device->index; |
75216638 | 878 | resp.port_num = ctx->cm_id->port_num; |
c72f2189 | 879 | |
fe53ba2f | 880 | if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 | 881 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
5d9fb044 | 882 | else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 MW |
883 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
884 | else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) | |
e86f8b06 | 885 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
75216638 SH |
886 | |
887 | out: | |
7c119107 | 888 | mutex_unlock(&ctx->mutex); |
17793833 LR |
889 | if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, |
890 | min_t(size_t, out_len, sizeof(resp)))) | |
75216638 SH |
891 | ret = -EFAULT; |
892 | ||
893 | ucma_put_ctx(ctx); | |
894 | return ret; | |
895 | } | |
896 | ||
ee7aed45 SH |
897 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
898 | struct rdma_ucm_query_addr_resp *resp) | |
899 | { | |
900 | if (!cm_id->device) | |
901 | return; | |
902 | ||
903 | resp->node_guid = (__force __u64) cm_id->device->node_guid; | |
17793833 | 904 | resp->ibdev_index = cm_id->device->index; |
ee7aed45 SH |
905 | resp->port_num = cm_id->port_num; |
906 | resp->pkey = (__force __u16) cpu_to_be16( | |
907 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); | |
908 | } | |
909 | ||
910 | static ssize_t ucma_query_addr(struct ucma_context *ctx, | |
911 | void __user *response, int out_len) | |
912 | { | |
913 | struct rdma_ucm_query_addr_resp resp; | |
914 | struct sockaddr *addr; | |
915 | int ret = 0; | |
916 | ||
17793833 | 917 | if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) |
ee7aed45 SH |
918 | return -ENOSPC; |
919 | ||
920 | memset(&resp, 0, sizeof resp); | |
921 | ||
922 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; | |
923 | resp.src_size = rdma_addr_size(addr); | |
924 | memcpy(&resp.src_addr, addr, resp.src_size); | |
925 | ||
926 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; | |
927 | resp.dst_size = rdma_addr_size(addr); | |
928 | memcpy(&resp.dst_addr, addr, resp.dst_size); | |
929 | ||
930 | ucma_query_device_addr(ctx->cm_id, &resp); | |
931 | ||
17793833 | 932 | if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) |
ee7aed45 SH |
933 | ret = -EFAULT; |
934 | ||
935 | return ret; | |
936 | } | |
937 | ||
ac53b264 SH |
938 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
939 | void __user *response, int out_len) | |
940 | { | |
941 | struct rdma_ucm_query_path_resp *resp; | |
942 | int i, ret = 0; | |
943 | ||
944 | if (out_len < sizeof(*resp)) | |
945 | return -ENOSPC; | |
946 | ||
947 | resp = kzalloc(out_len, GFP_KERNEL); | |
948 | if (!resp) | |
949 | return -ENOMEM; | |
950 | ||
951 | resp->num_paths = ctx->cm_id->route.num_paths; | |
952 | for (i = 0, out_len -= sizeof(*resp); | |
953 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); | |
954 | i++, out_len -= sizeof(struct ib_path_rec_data)) { | |
57520751 | 955 | struct sa_path_rec *rec = &ctx->cm_id->route.path_rec[i]; |
ac53b264 SH |
956 | |
957 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | | |
958 | IB_PATH_BIDIRECTIONAL; | |
89838118 | 959 | if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { |
57520751 DC |
960 | struct sa_path_rec ib; |
961 | ||
962 | sa_convert_path_opa_to_ib(&ib, rec); | |
963 | ib_sa_pack_path(&ib, &resp->path_data[i].path_rec); | |
89838118 PP |
964 | |
965 | } else { | |
966 | ib_sa_pack_path(rec, &resp->path_data[i].path_rec); | |
57520751 | 967 | } |
ac53b264 SH |
968 | } |
969 | ||
9bcb8940 | 970 | if (copy_to_user(response, resp, struct_size(resp, path_data, i))) |
ac53b264 SH |
971 | ret = -EFAULT; |
972 | ||
973 | kfree(resp); | |
974 | return ret; | |
975 | } | |
976 | ||
edaa7a55 SH |
977 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
978 | void __user *response, int out_len) | |
979 | { | |
980 | struct rdma_ucm_query_addr_resp resp; | |
981 | struct sockaddr_ib *addr; | |
982 | int ret = 0; | |
983 | ||
17793833 | 984 | if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) |
edaa7a55 SH |
985 | return -ENOSPC; |
986 | ||
987 | memset(&resp, 0, sizeof resp); | |
988 | ||
989 | ucma_query_device_addr(ctx->cm_id, &resp); | |
990 | ||
991 | addr = (struct sockaddr_ib *) &resp.src_addr; | |
992 | resp.src_size = sizeof(*addr); | |
993 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { | |
994 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); | |
995 | } else { | |
996 | addr->sib_family = AF_IB; | |
997 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
998 | rdma_read_gids(ctx->cm_id, (union ib_gid *)&addr->sib_addr, |
999 | NULL); | |
edaa7a55 SH |
1000 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
1001 | &ctx->cm_id->route.addr.src_addr); | |
1002 | } | |
1003 | ||
1004 | addr = (struct sockaddr_ib *) &resp.dst_addr; | |
1005 | resp.dst_size = sizeof(*addr); | |
1006 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { | |
1007 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); | |
1008 | } else { | |
1009 | addr->sib_family = AF_IB; | |
1010 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
1011 | rdma_read_gids(ctx->cm_id, NULL, |
1012 | (union ib_gid *)&addr->sib_addr); | |
edaa7a55 SH |
1013 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
1014 | &ctx->cm_id->route.addr.dst_addr); | |
1015 | } | |
1016 | ||
17793833 | 1017 | if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) |
edaa7a55 SH |
1018 | ret = -EFAULT; |
1019 | ||
1020 | return ret; | |
1021 | } | |
1022 | ||
ee7aed45 SH |
1023 | static ssize_t ucma_query(struct ucma_file *file, |
1024 | const char __user *inbuf, | |
1025 | int in_len, int out_len) | |
1026 | { | |
1027 | struct rdma_ucm_query cmd; | |
1028 | struct ucma_context *ctx; | |
1029 | void __user *response; | |
1030 | int ret; | |
1031 | ||
1032 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1033 | return -EFAULT; | |
1034 | ||
6f57c933 | 1035 | response = u64_to_user_ptr(cmd.response); |
ee7aed45 SH |
1036 | ctx = ucma_get_ctx(file, cmd.id); |
1037 | if (IS_ERR(ctx)) | |
1038 | return PTR_ERR(ctx); | |
1039 | ||
7c119107 | 1040 | mutex_lock(&ctx->mutex); |
ee7aed45 SH |
1041 | switch (cmd.option) { |
1042 | case RDMA_USER_CM_QUERY_ADDR: | |
1043 | ret = ucma_query_addr(ctx, response, out_len); | |
1044 | break; | |
ac53b264 SH |
1045 | case RDMA_USER_CM_QUERY_PATH: |
1046 | ret = ucma_query_path(ctx, response, out_len); | |
1047 | break; | |
edaa7a55 SH |
1048 | case RDMA_USER_CM_QUERY_GID: |
1049 | ret = ucma_query_gid(ctx, response, out_len); | |
1050 | break; | |
ee7aed45 SH |
1051 | default: |
1052 | ret = -ENOSYS; | |
1053 | break; | |
1054 | } | |
7c119107 | 1055 | mutex_unlock(&ctx->mutex); |
ee7aed45 SH |
1056 | |
1057 | ucma_put_ctx(ctx); | |
1058 | return ret; | |
1059 | } | |
1060 | ||
5c438135 SH |
1061 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
1062 | struct rdma_conn_param *dst, | |
75216638 SH |
1063 | struct rdma_ucm_conn_param *src) |
1064 | { | |
1065 | dst->private_data = src->private_data; | |
1066 | dst->private_data_len = src->private_data_len; | |
1067 | dst->responder_resources =src->responder_resources; | |
1068 | dst->initiator_depth = src->initiator_depth; | |
1069 | dst->flow_control = src->flow_control; | |
1070 | dst->retry_count = src->retry_count; | |
1071 | dst->rnr_retry_count = src->rnr_retry_count; | |
1072 | dst->srq = src->srq; | |
ca750d4a | 1073 | dst->qp_num = src->qp_num & 0xFFFFFF; |
5c438135 | 1074 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
75216638 SH |
1075 | } |
1076 | ||
1077 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
1078 | int in_len, int out_len) | |
1079 | { | |
75216638 | 1080 | struct rdma_conn_param conn_param; |
34e2ab57 LR |
1081 | struct rdma_ucm_ece ece = {}; |
1082 | struct rdma_ucm_connect cmd; | |
75216638 | 1083 | struct ucma_context *ctx; |
34e2ab57 | 1084 | size_t in_size; |
75216638 SH |
1085 | int ret; |
1086 | ||
34e2ab57 LR |
1087 | in_size = min_t(size_t, in_len, sizeof(cmd)); |
1088 | if (copy_from_user(&cmd, inbuf, in_size)) | |
75216638 SH |
1089 | return -EFAULT; |
1090 | ||
1091 | if (!cmd.conn_param.valid) | |
1092 | return -EINVAL; | |
1093 | ||
8b77586b | 1094 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1095 | if (IS_ERR(ctx)) |
1096 | return PTR_ERR(ctx); | |
1097 | ||
5c438135 | 1098 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
34e2ab57 LR |
1099 | if (offsetofend(typeof(cmd), ece) <= in_size) { |
1100 | ece.vendor_id = cmd.ece.vendor_id; | |
1101 | ece.attr_mod = cmd.ece.attr_mod; | |
1102 | } | |
1103 | ||
7c119107 | 1104 | mutex_lock(&ctx->mutex); |
34e2ab57 | 1105 | ret = rdma_connect_ece(ctx->cm_id, &conn_param, &ece); |
7c119107 | 1106 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1107 | ucma_put_ctx(ctx); |
1108 | return ret; | |
1109 | } | |
1110 | ||
1111 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
1112 | int in_len, int out_len) | |
1113 | { | |
1114 | struct rdma_ucm_listen cmd; | |
1115 | struct ucma_context *ctx; | |
1116 | int ret; | |
1117 | ||
1118 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1119 | return -EFAULT; | |
1120 | ||
1121 | ctx = ucma_get_ctx(file, cmd.id); | |
1122 | if (IS_ERR(ctx)) | |
1123 | return PTR_ERR(ctx); | |
1124 | ||
97cb7e40 SW |
1125 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
1126 | cmd.backlog : max_backlog; | |
7c119107 | 1127 | mutex_lock(&ctx->mutex); |
75216638 | 1128 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
7c119107 | 1129 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1130 | ucma_put_ctx(ctx); |
1131 | return ret; | |
1132 | } | |
1133 | ||
1134 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
1135 | int in_len, int out_len) | |
1136 | { | |
1137 | struct rdma_ucm_accept cmd; | |
1138 | struct rdma_conn_param conn_param; | |
0cb15372 | 1139 | struct rdma_ucm_ece ece = {}; |
75216638 | 1140 | struct ucma_context *ctx; |
0cb15372 | 1141 | size_t in_size; |
75216638 SH |
1142 | int ret; |
1143 | ||
0cb15372 LR |
1144 | in_size = min_t(size_t, in_len, sizeof(cmd)); |
1145 | if (copy_from_user(&cmd, inbuf, in_size)) | |
75216638 SH |
1146 | return -EFAULT; |
1147 | ||
8b77586b | 1148 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1149 | if (IS_ERR(ctx)) |
1150 | return PTR_ERR(ctx); | |
1151 | ||
0cb15372 LR |
1152 | if (offsetofend(typeof(cmd), ece) <= in_size) { |
1153 | ece.vendor_id = cmd.ece.vendor_id; | |
1154 | ece.attr_mod = cmd.ece.attr_mod; | |
1155 | } | |
1156 | ||
75216638 | 1157 | if (cmd.conn_param.valid) { |
5c438135 | 1158 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
9ced69ca | 1159 | mutex_lock(&file->mut); |
7c119107 | 1160 | mutex_lock(&ctx->mutex); |
0cb15372 | 1161 | ret = __rdma_accept_ece(ctx->cm_id, &conn_param, NULL, &ece); |
7c119107 | 1162 | mutex_unlock(&ctx->mutex); |
9ced69ca SH |
1163 | if (!ret) |
1164 | ctx->uid = cmd.uid; | |
1165 | mutex_unlock(&file->mut); | |
7c119107 JG |
1166 | } else { |
1167 | mutex_lock(&ctx->mutex); | |
0cb15372 | 1168 | ret = __rdma_accept_ece(ctx->cm_id, NULL, NULL, &ece); |
7c119107 JG |
1169 | mutex_unlock(&ctx->mutex); |
1170 | } | |
75216638 SH |
1171 | ucma_put_ctx(ctx); |
1172 | return ret; | |
1173 | } | |
1174 | ||
1175 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
1176 | int in_len, int out_len) | |
1177 | { | |
1178 | struct rdma_ucm_reject cmd; | |
1179 | struct ucma_context *ctx; | |
1180 | int ret; | |
1181 | ||
1182 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1183 | return -EFAULT; | |
1184 | ||
8094ba0a LR |
1185 | if (!cmd.reason) |
1186 | cmd.reason = IB_CM_REJ_CONSUMER_DEFINED; | |
1187 | ||
1188 | switch (cmd.reason) { | |
1189 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1190 | case IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED: | |
1191 | break; | |
1192 | default: | |
1193 | return -EINVAL; | |
1194 | } | |
1195 | ||
8b77586b | 1196 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1197 | if (IS_ERR(ctx)) |
1198 | return PTR_ERR(ctx); | |
1199 | ||
7c119107 | 1200 | mutex_lock(&ctx->mutex); |
8094ba0a LR |
1201 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len, |
1202 | cmd.reason); | |
7c119107 | 1203 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1204 | ucma_put_ctx(ctx); |
1205 | return ret; | |
1206 | } | |
1207 | ||
1208 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
1209 | int in_len, int out_len) | |
1210 | { | |
1211 | struct rdma_ucm_disconnect cmd; | |
1212 | struct ucma_context *ctx; | |
1213 | int ret; | |
1214 | ||
1215 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1216 | return -EFAULT; | |
1217 | ||
8b77586b | 1218 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1219 | if (IS_ERR(ctx)) |
1220 | return PTR_ERR(ctx); | |
1221 | ||
7c119107 | 1222 | mutex_lock(&ctx->mutex); |
75216638 | 1223 | ret = rdma_disconnect(ctx->cm_id); |
7c119107 | 1224 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1225 | ucma_put_ctx(ctx); |
1226 | return ret; | |
1227 | } | |
1228 | ||
1229 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
1230 | const char __user *inbuf, | |
1231 | int in_len, int out_len) | |
1232 | { | |
1233 | struct rdma_ucm_init_qp_attr cmd; | |
1234 | struct ib_uverbs_qp_attr resp; | |
1235 | struct ucma_context *ctx; | |
1236 | struct ib_qp_attr qp_attr; | |
1237 | int ret; | |
1238 | ||
1239 | if (out_len < sizeof(resp)) | |
1240 | return -ENOSPC; | |
1241 | ||
1242 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1243 | return -EFAULT; | |
1244 | ||
a5880b84 LR |
1245 | if (cmd.qp_state > IB_QPS_ERR) |
1246 | return -EINVAL; | |
1247 | ||
8b77586b | 1248 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1249 | if (IS_ERR(ctx)) |
1250 | return PTR_ERR(ctx); | |
1251 | ||
1252 | resp.qp_attr_mask = 0; | |
1253 | memset(&qp_attr, 0, sizeof qp_attr); | |
1254 | qp_attr.qp_state = cmd.qp_state; | |
7c119107 | 1255 | mutex_lock(&ctx->mutex); |
75216638 | 1256 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); |
7c119107 | 1257 | mutex_unlock(&ctx->mutex); |
75216638 SH |
1258 | if (ret) |
1259 | goto out; | |
1260 | ||
d541e455 | 1261 | ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr); |
6f57c933 | 1262 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
1263 | &resp, sizeof(resp))) |
1264 | ret = -EFAULT; | |
1265 | ||
1266 | out: | |
1267 | ucma_put_ctx(ctx); | |
1268 | return ret; | |
1269 | } | |
1270 | ||
7ce86409 SH |
1271 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
1272 | void *optval, size_t optlen) | |
1273 | { | |
1274 | int ret = 0; | |
1275 | ||
1276 | switch (optname) { | |
1277 | case RDMA_OPTION_ID_TOS: | |
1278 | if (optlen != sizeof(u8)) { | |
1279 | ret = -EINVAL; | |
1280 | break; | |
1281 | } | |
1282 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
1283 | break; | |
a9bb7912 HS |
1284 | case RDMA_OPTION_ID_REUSEADDR: |
1285 | if (optlen != sizeof(int)) { | |
1286 | ret = -EINVAL; | |
1287 | break; | |
1288 | } | |
1289 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1290 | break; | |
68602120 SH |
1291 | case RDMA_OPTION_ID_AFONLY: |
1292 | if (optlen != sizeof(int)) { | |
1293 | ret = -EINVAL; | |
1294 | break; | |
1295 | } | |
1296 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1297 | break; | |
2c1619ed DG |
1298 | case RDMA_OPTION_ID_ACK_TIMEOUT: |
1299 | if (optlen != sizeof(u8)) { | |
1300 | ret = -EINVAL; | |
1301 | break; | |
1302 | } | |
1303 | ret = rdma_set_ack_timeout(ctx->cm_id, *((u8 *)optval)); | |
1304 | break; | |
7ce86409 SH |
1305 | default: |
1306 | ret = -ENOSYS; | |
1307 | } | |
1308 | ||
1309 | return ret; | |
1310 | } | |
1311 | ||
a7ca1f00 SH |
1312 | static int ucma_set_ib_path(struct ucma_context *ctx, |
1313 | struct ib_path_rec_data *path_data, size_t optlen) | |
1314 | { | |
c2f8fc4e | 1315 | struct sa_path_rec sa_path; |
a7ca1f00 SH |
1316 | struct rdma_cm_event event; |
1317 | int ret; | |
1318 | ||
1319 | if (optlen % sizeof(*path_data)) | |
1320 | return -EINVAL; | |
1321 | ||
1322 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
1323 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
1324 | IB_PATH_BIDIRECTIONAL)) | |
1325 | break; | |
1326 | } | |
1327 | ||
1328 | if (!optlen) | |
1329 | return -EINVAL; | |
1330 | ||
8435168d RD |
1331 | if (!ctx->cm_id->device) |
1332 | return -EINVAL; | |
1333 | ||
c2be9dc0 | 1334 | memset(&sa_path, 0, sizeof(sa_path)); |
c2be9dc0 | 1335 | |
57520751 | 1336 | sa_path.rec_type = SA_PATH_REC_TYPE_IB; |
a7ca1f00 | 1337 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
57520751 DC |
1338 | |
1339 | if (rdma_cap_opa_ah(ctx->cm_id->device, ctx->cm_id->port_num)) { | |
1340 | struct sa_path_rec opa; | |
1341 | ||
1342 | sa_convert_path_ib_to_opa(&opa, &sa_path); | |
7c119107 | 1343 | mutex_lock(&ctx->mutex); |
fe75889f | 1344 | ret = rdma_set_ib_path(ctx->cm_id, &opa); |
7c119107 | 1345 | mutex_unlock(&ctx->mutex); |
57520751 | 1346 | } else { |
7c119107 | 1347 | mutex_lock(&ctx->mutex); |
fe75889f | 1348 | ret = rdma_set_ib_path(ctx->cm_id, &sa_path); |
7c119107 | 1349 | mutex_unlock(&ctx->mutex); |
57520751 | 1350 | } |
a7ca1f00 SH |
1351 | if (ret) |
1352 | return ret; | |
1353 | ||
1354 | memset(&event, 0, sizeof event); | |
1355 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1356 | return ucma_event_handler(ctx->cm_id, &event); | |
1357 | } | |
1358 | ||
1359 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
1360 | void *optval, size_t optlen) | |
1361 | { | |
1362 | int ret; | |
1363 | ||
1364 | switch (optname) { | |
1365 | case RDMA_OPTION_IB_PATH: | |
1366 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
1367 | break; | |
1368 | default: | |
1369 | ret = -ENOSYS; | |
1370 | } | |
1371 | ||
1372 | return ret; | |
1373 | } | |
1374 | ||
7ce86409 SH |
1375 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
1376 | int optname, void *optval, size_t optlen) | |
1377 | { | |
1378 | int ret; | |
1379 | ||
1380 | switch (level) { | |
1381 | case RDMA_OPTION_ID: | |
7c119107 | 1382 | mutex_lock(&ctx->mutex); |
7ce86409 | 1383 | ret = ucma_set_option_id(ctx, optname, optval, optlen); |
7c119107 | 1384 | mutex_unlock(&ctx->mutex); |
7ce86409 | 1385 | break; |
a7ca1f00 SH |
1386 | case RDMA_OPTION_IB: |
1387 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
1388 | break; | |
7ce86409 SH |
1389 | default: |
1390 | ret = -ENOSYS; | |
1391 | } | |
1392 | ||
1393 | return ret; | |
1394 | } | |
1395 | ||
1396 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
1397 | int in_len, int out_len) | |
1398 | { | |
1399 | struct rdma_ucm_set_option cmd; | |
1400 | struct ucma_context *ctx; | |
1401 | void *optval; | |
1402 | int ret; | |
1403 | ||
1404 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1405 | return -EFAULT; | |
1406 | ||
ef95a90a SR |
1407 | if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE)) |
1408 | return -EINVAL; | |
1409 | ||
7ce86409 SH |
1410 | ctx = ucma_get_ctx(file, cmd.id); |
1411 | if (IS_ERR(ctx)) | |
1412 | return PTR_ERR(ctx); | |
1413 | ||
6f57c933 | 1414 | optval = memdup_user(u64_to_user_ptr(cmd.optval), |
0764c76e RD |
1415 | cmd.optlen); |
1416 | if (IS_ERR(optval)) { | |
1417 | ret = PTR_ERR(optval); | |
1418 | goto out; | |
7ce86409 SH |
1419 | } |
1420 | ||
1421 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1422 | cmd.optlen); | |
7ce86409 | 1423 | kfree(optval); |
0764c76e RD |
1424 | |
1425 | out: | |
7ce86409 SH |
1426 | ucma_put_ctx(ctx); |
1427 | return ret; | |
1428 | } | |
1429 | ||
75216638 SH |
1430 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1431 | int in_len, int out_len) | |
1432 | { | |
1433 | struct rdma_ucm_notify cmd; | |
1434 | struct ucma_context *ctx; | |
c8d3bcbf | 1435 | int ret = -EINVAL; |
75216638 SH |
1436 | |
1437 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1438 | return -EFAULT; | |
1439 | ||
1440 | ctx = ucma_get_ctx(file, cmd.id); | |
1441 | if (IS_ERR(ctx)) | |
1442 | return PTR_ERR(ctx); | |
1443 | ||
7c119107 | 1444 | mutex_lock(&ctx->mutex); |
c8d3bcbf LR |
1445 | if (ctx->cm_id->device) |
1446 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type)cmd.event); | |
7c119107 | 1447 | mutex_unlock(&ctx->mutex); |
c8d3bcbf | 1448 | |
75216638 SH |
1449 | ucma_put_ctx(ctx); |
1450 | return ret; | |
1451 | } | |
1452 | ||
5bc2b7b3 SH |
1453 | static ssize_t ucma_process_join(struct ucma_file *file, |
1454 | struct rdma_ucm_join_mcast *cmd, int out_len) | |
c8f6a362 | 1455 | { |
c8f6a362 SH |
1456 | struct rdma_ucm_create_id_resp resp; |
1457 | struct ucma_context *ctx; | |
1458 | struct ucma_multicast *mc; | |
5bc2b7b3 | 1459 | struct sockaddr *addr; |
c8f6a362 | 1460 | int ret; |
ab15c95a | 1461 | u8 join_state; |
c8f6a362 SH |
1462 | |
1463 | if (out_len < sizeof(resp)) | |
1464 | return -ENOSPC; | |
1465 | ||
5bc2b7b3 | 1466 | addr = (struct sockaddr *) &cmd->addr; |
0c81ffc6 | 1467 | if (cmd->addr_size != rdma_addr_size(addr)) |
ab15c95a AV |
1468 | return -EINVAL; |
1469 | ||
1470 | if (cmd->join_flags == RDMA_MC_JOIN_FLAG_FULLMEMBER) | |
1471 | join_state = BIT(FULLMEMBER_JOIN); | |
1472 | else if (cmd->join_flags == RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER) | |
1473 | join_state = BIT(SENDONLY_FULLMEMBER_JOIN); | |
1474 | else | |
5bc2b7b3 | 1475 | return -EINVAL; |
c8f6a362 | 1476 | |
8b77586b | 1477 | ctx = ucma_get_ctx_dev(file, cmd->id); |
c8f6a362 SH |
1478 | if (IS_ERR(ctx)) |
1479 | return PTR_ERR(ctx); | |
1480 | ||
1481 | mutex_lock(&file->mut); | |
1482 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1483 | if (!mc) { |
1484 | ret = -ENOMEM; | |
c8f6a362 SH |
1485 | goto err1; |
1486 | } | |
ab15c95a | 1487 | mc->join_state = join_state; |
5bc2b7b3 SH |
1488 | mc->uid = cmd->uid; |
1489 | memcpy(&mc->addr, addr, cmd->addr_size); | |
7c119107 | 1490 | mutex_lock(&ctx->mutex); |
ab15c95a AV |
1491 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *)&mc->addr, |
1492 | join_state, mc); | |
7c119107 | 1493 | mutex_unlock(&ctx->mutex); |
c8f6a362 SH |
1494 | if (ret) |
1495 | goto err2; | |
1496 | ||
1497 | resp.id = mc->id; | |
6f57c933 | 1498 | if (copy_to_user(u64_to_user_ptr(cmd->response), |
c8f6a362 SH |
1499 | &resp, sizeof(resp))) { |
1500 | ret = -EFAULT; | |
1501 | goto err3; | |
1502 | } | |
1503 | ||
4dfd5321 | 1504 | xa_store(&multicast_table, mc->id, mc, 0); |
cb2595c1 | 1505 | |
c8f6a362 SH |
1506 | mutex_unlock(&file->mut); |
1507 | ucma_put_ctx(ctx); | |
1508 | return 0; | |
1509 | ||
1510 | err3: | |
3f446754 | 1511 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1512 | ucma_cleanup_mc_events(mc); |
1513 | err2: | |
4dfd5321 | 1514 | xa_erase(&multicast_table, mc->id); |
c8f6a362 SH |
1515 | list_del(&mc->list); |
1516 | kfree(mc); | |
1517 | err1: | |
1518 | mutex_unlock(&file->mut); | |
1519 | ucma_put_ctx(ctx); | |
1520 | return ret; | |
1521 | } | |
1522 | ||
5bc2b7b3 SH |
1523 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
1524 | const char __user *inbuf, | |
1525 | int in_len, int out_len) | |
1526 | { | |
1527 | struct rdma_ucm_join_ip_mcast cmd; | |
1528 | struct rdma_ucm_join_mcast join_cmd; | |
1529 | ||
1530 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1531 | return -EFAULT; | |
1532 | ||
1533 | join_cmd.response = cmd.response; | |
1534 | join_cmd.uid = cmd.uid; | |
1535 | join_cmd.id = cmd.id; | |
84652aef | 1536 | join_cmd.addr_size = rdma_addr_size_in6(&cmd.addr); |
0c81ffc6 LR |
1537 | if (!join_cmd.addr_size) |
1538 | return -EINVAL; | |
1539 | ||
ab15c95a | 1540 | join_cmd.join_flags = RDMA_MC_JOIN_FLAG_FULLMEMBER; |
5bc2b7b3 SH |
1541 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); |
1542 | ||
1543 | return ucma_process_join(file, &join_cmd, out_len); | |
1544 | } | |
1545 | ||
1546 | static ssize_t ucma_join_multicast(struct ucma_file *file, | |
1547 | const char __user *inbuf, | |
1548 | int in_len, int out_len) | |
1549 | { | |
1550 | struct rdma_ucm_join_mcast cmd; | |
1551 | ||
1552 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1553 | return -EFAULT; | |
1554 | ||
84652aef | 1555 | if (!rdma_addr_size_kss(&cmd.addr)) |
0c81ffc6 LR |
1556 | return -EINVAL; |
1557 | ||
5bc2b7b3 SH |
1558 | return ucma_process_join(file, &cmd, out_len); |
1559 | } | |
1560 | ||
c8f6a362 SH |
1561 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
1562 | const char __user *inbuf, | |
1563 | int in_len, int out_len) | |
1564 | { | |
1565 | struct rdma_ucm_destroy_id cmd; | |
1566 | struct rdma_ucm_destroy_id_resp resp; | |
1567 | struct ucma_multicast *mc; | |
1568 | int ret = 0; | |
1569 | ||
1570 | if (out_len < sizeof(resp)) | |
1571 | return -ENOSPC; | |
1572 | ||
1573 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1574 | return -EFAULT; | |
1575 | ||
4dfd5321 MW |
1576 | xa_lock(&multicast_table); |
1577 | mc = xa_load(&multicast_table, cmd.id); | |
c8f6a362 SH |
1578 | if (!mc) |
1579 | mc = ERR_PTR(-ENOENT); | |
1580 | else if (mc->ctx->file != file) | |
1581 | mc = ERR_PTR(-EINVAL); | |
167b95ec | 1582 | else if (!refcount_inc_not_zero(&mc->ctx->ref)) |
7e967fd0 JG |
1583 | mc = ERR_PTR(-ENXIO); |
1584 | else | |
4dfd5321 MW |
1585 | __xa_erase(&multicast_table, mc->id); |
1586 | xa_unlock(&multicast_table); | |
c8f6a362 SH |
1587 | |
1588 | if (IS_ERR(mc)) { | |
1589 | ret = PTR_ERR(mc); | |
1590 | goto out; | |
1591 | } | |
1592 | ||
7c119107 | 1593 | mutex_lock(&mc->ctx->mutex); |
3f446754 | 1594 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
7c119107 JG |
1595 | mutex_unlock(&mc->ctx->mutex); |
1596 | ||
c8f6a362 SH |
1597 | mutex_lock(&mc->ctx->file->mut); |
1598 | ucma_cleanup_mc_events(mc); | |
1599 | list_del(&mc->list); | |
1600 | mutex_unlock(&mc->ctx->file->mut); | |
1601 | ||
1602 | ucma_put_ctx(mc->ctx); | |
1603 | resp.events_reported = mc->events_reported; | |
1604 | kfree(mc); | |
1605 | ||
6f57c933 | 1606 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
c8f6a362 SH |
1607 | &resp, sizeof(resp))) |
1608 | ret = -EFAULT; | |
1609 | out: | |
1610 | return ret; | |
1611 | } | |
1612 | ||
88314e4d SH |
1613 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1614 | { | |
1615 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1616 | if (file1 < file2) { | |
1617 | mutex_lock(&file1->mut); | |
31b57b87 | 1618 | mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1619 | } else { |
1620 | mutex_lock(&file2->mut); | |
31b57b87 | 1621 | mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1622 | } |
1623 | } | |
1624 | ||
1625 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1626 | { | |
1627 | if (file1 < file2) { | |
1628 | mutex_unlock(&file2->mut); | |
1629 | mutex_unlock(&file1->mut); | |
1630 | } else { | |
1631 | mutex_unlock(&file1->mut); | |
1632 | mutex_unlock(&file2->mut); | |
1633 | } | |
1634 | } | |
1635 | ||
1636 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1637 | { | |
1638 | struct ucma_event *uevent, *tmp; | |
1639 | ||
1640 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1641 | if (uevent->ctx == ctx) | |
1642 | list_move_tail(&uevent->list, &file->event_list); | |
1643 | } | |
1644 | ||
1645 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1646 | const char __user *inbuf, | |
1647 | int in_len, int out_len) | |
1648 | { | |
1649 | struct rdma_ucm_migrate_id cmd; | |
1650 | struct rdma_ucm_migrate_resp resp; | |
1651 | struct ucma_context *ctx; | |
2903ff01 | 1652 | struct fd f; |
88314e4d SH |
1653 | struct ucma_file *cur_file; |
1654 | int ret = 0; | |
1655 | ||
1656 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1657 | return -EFAULT; | |
1658 | ||
1659 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1660 | f = fdget(cmd.fd); |
1661 | if (!f.file) | |
88314e4d | 1662 | return -ENOENT; |
0d23ba60 JH |
1663 | if (f.file->f_op != &ucma_fops) { |
1664 | ret = -EINVAL; | |
1665 | goto file_put; | |
1666 | } | |
88314e4d SH |
1667 | |
1668 | /* Validate current fd and prevent destruction of id. */ | |
2903ff01 | 1669 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
88314e4d SH |
1670 | if (IS_ERR(ctx)) { |
1671 | ret = PTR_ERR(ctx); | |
1672 | goto file_put; | |
1673 | } | |
1674 | ||
1675 | cur_file = ctx->file; | |
1676 | if (cur_file == new_file) { | |
1677 | resp.events_reported = ctx->events_reported; | |
1678 | goto response; | |
1679 | } | |
1680 | ||
1681 | /* | |
1682 | * Migrate events between fd's, maintaining order, and avoiding new | |
1683 | * events being added before existing events. | |
1684 | */ | |
1685 | ucma_lock_files(cur_file, new_file); | |
afcafe07 | 1686 | xa_lock(&ctx_table); |
88314e4d SH |
1687 | |
1688 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1689 | ucma_move_events(ctx, new_file); | |
1690 | ctx->file = new_file; | |
1691 | resp.events_reported = ctx->events_reported; | |
1692 | ||
afcafe07 | 1693 | xa_unlock(&ctx_table); |
88314e4d SH |
1694 | ucma_unlock_files(cur_file, new_file); |
1695 | ||
1696 | response: | |
6f57c933 | 1697 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
88314e4d SH |
1698 | &resp, sizeof(resp))) |
1699 | ret = -EFAULT; | |
1700 | ||
1701 | ucma_put_ctx(ctx); | |
1702 | file_put: | |
2903ff01 | 1703 | fdput(f); |
88314e4d SH |
1704 | return ret; |
1705 | } | |
1706 | ||
75216638 SH |
1707 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1708 | const char __user *inbuf, | |
1709 | int in_len, int out_len) = { | |
05ad9457 SH |
1710 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
1711 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1712 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, | |
1713 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, | |
1714 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, | |
1715 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1716 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1717 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1718 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1719 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1720 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1721 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1722 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1723 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
1724 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, | |
1725 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, | |
1726 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, | |
1727 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
1728 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, | |
eebe4c3a | 1729 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
209cf2a7 | 1730 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
5bc2b7b3 SH |
1731 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
1732 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast | |
75216638 SH |
1733 | }; |
1734 | ||
1735 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1736 | size_t len, loff_t *pos) | |
1737 | { | |
1738 | struct ucma_file *file = filp->private_data; | |
1739 | struct rdma_ucm_cmd_hdr hdr; | |
1740 | ssize_t ret; | |
1741 | ||
f73a1dbc LR |
1742 | if (!ib_safe_file_access(filp)) { |
1743 | pr_err_once("ucma_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n", | |
1744 | task_tgid_vnr(current), current->comm); | |
e6bd18f5 | 1745 | return -EACCES; |
f73a1dbc | 1746 | } |
e6bd18f5 | 1747 | |
75216638 SH |
1748 | if (len < sizeof(hdr)) |
1749 | return -EINVAL; | |
1750 | ||
1751 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1752 | return -EFAULT; | |
1753 | ||
caf6e3f2 | 1754 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 | 1755 | return -EINVAL; |
a3671a4f | 1756 | hdr.cmd = array_index_nospec(hdr.cmd, ARRAY_SIZE(ucma_cmd_table)); |
75216638 SH |
1757 | |
1758 | if (hdr.in + sizeof(hdr) > len) | |
1759 | return -EINVAL; | |
1760 | ||
1761 | if (!ucma_cmd_table[hdr.cmd]) | |
1762 | return -ENOSYS; | |
1763 | ||
1764 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1765 | if (!ret) | |
1766 | ret = len; | |
1767 | ||
1768 | return ret; | |
1769 | } | |
1770 | ||
afc9a42b | 1771 | static __poll_t ucma_poll(struct file *filp, struct poll_table_struct *wait) |
75216638 SH |
1772 | { |
1773 | struct ucma_file *file = filp->private_data; | |
afc9a42b | 1774 | __poll_t mask = 0; |
75216638 SH |
1775 | |
1776 | poll_wait(filp, &file->poll_wait, wait); | |
1777 | ||
1778 | if (!list_empty(&file->event_list)) | |
a9a08845 | 1779 | mask = EPOLLIN | EPOLLRDNORM; |
75216638 SH |
1780 | |
1781 | return mask; | |
1782 | } | |
1783 | ||
f7a6117e RD |
1784 | /* |
1785 | * ucma_open() does not need the BKL: | |
1786 | * | |
1787 | * - no global state is referred to; | |
1788 | * - there is no ioctl method to race against; | |
1789 | * - no further module initialization is required for open to work | |
1790 | * after the device is registered. | |
1791 | */ | |
75216638 SH |
1792 | static int ucma_open(struct inode *inode, struct file *filp) |
1793 | { | |
1794 | struct ucma_file *file; | |
1795 | ||
1796 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1797 | if (!file) | |
1798 | return -ENOMEM; | |
1799 | ||
a190d3b0 BS |
1800 | file->close_wq = alloc_ordered_workqueue("ucma_close_id", |
1801 | WQ_MEM_RECLAIM); | |
0174b381 SL |
1802 | if (!file->close_wq) { |
1803 | kfree(file); | |
1804 | return -ENOMEM; | |
1805 | } | |
1806 | ||
75216638 SH |
1807 | INIT_LIST_HEAD(&file->event_list); |
1808 | INIT_LIST_HEAD(&file->ctx_list); | |
1809 | init_waitqueue_head(&file->poll_wait); | |
1810 | mutex_init(&file->mut); | |
1811 | ||
1812 | filp->private_data = file; | |
1813 | file->filp = filp; | |
bc1db9af | 1814 | |
c5bf68fe | 1815 | return stream_open(inode, filp); |
75216638 SH |
1816 | } |
1817 | ||
1818 | static int ucma_close(struct inode *inode, struct file *filp) | |
1819 | { | |
1820 | struct ucma_file *file = filp->private_data; | |
1821 | struct ucma_context *ctx, *tmp; | |
1822 | ||
1823 | mutex_lock(&file->mut); | |
1824 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
e1c30298 | 1825 | ctx->destroying = 1; |
75216638 SH |
1826 | mutex_unlock(&file->mut); |
1827 | ||
afcafe07 | 1828 | xa_erase(&ctx_table, ctx->id); |
e1c30298 YH |
1829 | flush_workqueue(file->close_wq); |
1830 | /* At that step once ctx was marked as destroying and workqueue | |
1831 | * was flushed we are safe from any inflights handlers that | |
1832 | * might put other closing task. | |
1833 | */ | |
afcafe07 | 1834 | xa_lock(&ctx_table); |
e1c30298 | 1835 | if (!ctx->closing) { |
afcafe07 | 1836 | xa_unlock(&ctx_table); |
5fe23f26 CW |
1837 | ucma_put_ctx(ctx); |
1838 | wait_for_completion(&ctx->comp); | |
e1c30298 YH |
1839 | /* rdma_destroy_id ensures that no event handlers are |
1840 | * inflight for that id before releasing it. | |
1841 | */ | |
1842 | rdma_destroy_id(ctx->cm_id); | |
1843 | } else { | |
afcafe07 | 1844 | xa_unlock(&ctx_table); |
e1c30298 YH |
1845 | } |
1846 | ||
75216638 SH |
1847 | ucma_free_ctx(ctx); |
1848 | mutex_lock(&file->mut); | |
1849 | } | |
1850 | mutex_unlock(&file->mut); | |
e1c30298 | 1851 | destroy_workqueue(file->close_wq); |
75216638 SH |
1852 | kfree(file); |
1853 | return 0; | |
1854 | } | |
1855 | ||
2b8693c0 | 1856 | static const struct file_operations ucma_fops = { |
75216638 SH |
1857 | .owner = THIS_MODULE, |
1858 | .open = ucma_open, | |
1859 | .release = ucma_close, | |
1860 | .write = ucma_write, | |
1861 | .poll = ucma_poll, | |
bc1db9af | 1862 | .llseek = no_llseek, |
75216638 SH |
1863 | }; |
1864 | ||
1865 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1866 | .minor = MISC_DYNAMIC_MINOR, |
1867 | .name = "rdma_cm", | |
1868 | .nodename = "infiniband/rdma_cm", | |
1869 | .mode = 0666, | |
1870 | .fops = &ucma_fops, | |
75216638 SH |
1871 | }; |
1872 | ||
8f71bb00 JG |
1873 | static int ucma_get_global_nl_info(struct ib_client_nl_info *res) |
1874 | { | |
1875 | res->abi = RDMA_USER_CM_ABI_VERSION; | |
1876 | res->cdev = ucma_misc.this_device; | |
1877 | return 0; | |
1878 | } | |
1879 | ||
1880 | static struct ib_client rdma_cma_client = { | |
1881 | .name = "rdma_cm", | |
1882 | .get_global_nl_info = ucma_get_global_nl_info, | |
1883 | }; | |
1884 | MODULE_ALIAS_RDMA_CLIENT("rdma_cm"); | |
1885 | ||
75216638 SH |
1886 | static ssize_t show_abi_version(struct device *dev, |
1887 | struct device_attribute *attr, | |
1888 | char *buf) | |
1889 | { | |
1890 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1891 | } | |
1892 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1893 | ||
1894 | static int __init ucma_init(void) | |
1895 | { | |
1896 | int ret; | |
1897 | ||
1898 | ret = misc_register(&ucma_misc); | |
1899 | if (ret) | |
1900 | return ret; | |
1901 | ||
1902 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1903 | if (ret) { | |
aba25a3e | 1904 | pr_err("rdma_ucm: couldn't create abi_version attr\n"); |
97cb7e40 SW |
1905 | goto err1; |
1906 | } | |
1907 | ||
ec8f23ce | 1908 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 | 1909 | if (!ucma_ctl_table_hdr) { |
aba25a3e | 1910 | pr_err("rdma_ucm: couldn't register sysctl paths\n"); |
97cb7e40 SW |
1911 | ret = -ENOMEM; |
1912 | goto err2; | |
75216638 | 1913 | } |
8f71bb00 JG |
1914 | |
1915 | ret = ib_register_client(&rdma_cma_client); | |
1916 | if (ret) | |
1917 | goto err3; | |
1918 | ||
75216638 | 1919 | return 0; |
8f71bb00 JG |
1920 | err3: |
1921 | unregister_net_sysctl_table(ucma_ctl_table_hdr); | |
97cb7e40 SW |
1922 | err2: |
1923 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1924 | err1: | |
75216638 SH |
1925 | misc_deregister(&ucma_misc); |
1926 | return ret; | |
1927 | } | |
1928 | ||
1929 | static void __exit ucma_cleanup(void) | |
1930 | { | |
8f71bb00 | 1931 | ib_unregister_client(&rdma_cma_client); |
5dd3df10 | 1932 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1933 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1934 | misc_deregister(&ucma_misc); | |
75216638 SH |
1935 | } |
1936 | ||
1937 | module_init(ucma_init); | |
1938 | module_exit(ucma_cleanup); |