1/*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2005 Topspin Communications. All rights reserved. 5 * Copyright (c) 2005 Intel Corporation. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36#include <sys/cdefs.h> 37#include <linux/completion.h> 38#include <linux/fs.h> 39#include <linux/module.h> 40#include <linux/device.h> 41#include <linux/err.h> 42#include <linux/poll.h> 43#include <linux/sched.h> 44#include <linux/file.h> 45#include <linux/cdev.h> 46#include <linux/idr.h> 47#include <linux/mutex.h> 48#include <linux/slab.h> 49 50#include <asm/uaccess.h> 51 52#include <rdma/ib.h> 53#include <rdma/ib_cm.h> 54#include <rdma/ib_user_cm.h> 55#include <rdma/ib_marshall.h> 56 57MODULE_AUTHOR("Libor Michalek"); 58MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); 59MODULE_LICENSE("Dual BSD/GPL"); 60 61struct ib_ucm_device { 62 int devnum; 63 struct cdev cdev; 64 struct device dev; 65 struct ib_device *ib_dev; 66}; 67 68struct ib_ucm_file { 69 struct mutex file_mutex; 70 struct file *filp; 71 struct ib_ucm_device *device; 72 73 struct list_head ctxs; 74 struct list_head events; 75 wait_queue_head_t poll_wait; 76}; 77 78struct ib_ucm_context { 79 int id; 80 struct completion comp; 81 atomic_t ref; 82 int events_reported; 83 84 struct ib_ucm_file *file; 85 struct ib_cm_id *cm_id; 86 __u64 uid; 87 88 struct list_head events; /* list of pending events. */ 89 struct list_head file_list; /* member in file ctx list */ 90}; 91 92struct ib_ucm_event { 93 struct ib_ucm_context *ctx; 94 struct list_head file_list; /* member in file event list */ 95 struct list_head ctx_list; /* member in ctx event list */ 96 97 struct ib_cm_id *cm_id; 98 struct ib_ucm_event_resp resp; 99 void *data; 100 void *info; 101 int data_len; 102 int info_len; 103}; 104 105enum { 106 IB_UCM_MAJOR = 231, 107 IB_UCM_BASE_MINOR = 224, 108 IB_UCM_MAX_DEVICES = 32 109}; 110 111#define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) 112 113static void ib_ucm_add_one(struct ib_device *device); 114static void ib_ucm_remove_one(struct ib_device *device, void *client_data); 115 116static struct ib_client ucm_client = { 117 .name = "ucm", 118 .add = ib_ucm_add_one, 119 .remove = ib_ucm_remove_one 120}; 121 122static DEFINE_MUTEX(ctx_id_mutex); 123static DEFINE_IDR(ctx_id_table); 124static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); 125 126static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) 127{ 128 struct ib_ucm_context *ctx; 129 130 mutex_lock(&ctx_id_mutex); 131 ctx = idr_find(&ctx_id_table, id); 132 if (!ctx) 133 ctx = ERR_PTR(-ENOENT); 134 else if (ctx->file != file) 135 ctx = ERR_PTR(-EINVAL); 136 else 137 atomic_inc(&ctx->ref); 138 mutex_unlock(&ctx_id_mutex); 139 140 return ctx; 141} 142 143static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) 144{ 145 if (atomic_dec_and_test(&ctx->ref)) 146 complete(&ctx->comp); 147} 148 149static inline int ib_ucm_new_cm_id(int event) 150{ 151 return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; 152} 153 154static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) 155{ 156 struct ib_ucm_event *uevent; 157 158 mutex_lock(&ctx->file->file_mutex); 159 list_del(&ctx->file_list); 160 while (!list_empty(&ctx->events)) { 161 162 uevent = list_entry(ctx->events.next, 163 struct ib_ucm_event, ctx_list); 164 list_del(&uevent->file_list); 165 list_del(&uevent->ctx_list); 166 mutex_unlock(&ctx->file->file_mutex); 167 168 /* clear incoming connections. */ 169 if (ib_ucm_new_cm_id(uevent->resp.event)) 170 ib_destroy_cm_id(uevent->cm_id); 171 172 kfree(uevent); 173 mutex_lock(&ctx->file->file_mutex); 174 } 175 mutex_unlock(&ctx->file->file_mutex); 176} 177 178static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) 179{ 180 struct ib_ucm_context *ctx; 181 182 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 183 if (!ctx) 184 return NULL; 185 186 atomic_set(&ctx->ref, 1); 187 init_completion(&ctx->comp); 188 ctx->file = file; 189 INIT_LIST_HEAD(&ctx->events); 190 191 mutex_lock(&ctx_id_mutex); 192 ctx->id = idr_alloc(&ctx_id_table, ctx, 0, 0, GFP_KERNEL); 193 mutex_unlock(&ctx_id_mutex); 194 if (ctx->id < 0) 195 goto error; 196 197 list_add_tail(&ctx->file_list, &file->ctxs); 198 return ctx; 199 200error: 201 kfree(ctx); 202 return NULL; 203} 204 205static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, 206 struct ib_cm_req_event_param *kreq) 207{ 208 ureq->remote_ca_guid = kreq->remote_ca_guid; 209 ureq->remote_qkey = kreq->remote_qkey; 210 ureq->remote_qpn = kreq->remote_qpn; 211 ureq->qp_type = kreq->qp_type; 212 ureq->starting_psn = kreq->starting_psn; 213 ureq->responder_resources = kreq->responder_resources; 214 ureq->initiator_depth = kreq->initiator_depth; 215 ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; 216 ureq->flow_control = kreq->flow_control; 217 ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; 218 ureq->retry_count = kreq->retry_count; 219 ureq->rnr_retry_count = kreq->rnr_retry_count; 220 ureq->srq = kreq->srq; 221 ureq->port = kreq->port; 222 223 ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); 224 if (kreq->alternate_path) 225 ib_copy_path_rec_to_user(&ureq->alternate_path, 226 kreq->alternate_path); 227} 228 229static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, 230 struct ib_cm_rep_event_param *krep) 231{ 232 urep->remote_ca_guid = krep->remote_ca_guid; 233 urep->remote_qkey = krep->remote_qkey; 234 urep->remote_qpn = krep->remote_qpn; 235 urep->starting_psn = krep->starting_psn; 236 urep->responder_resources = krep->responder_resources; 237 urep->initiator_depth = krep->initiator_depth; 238 urep->target_ack_delay = krep->target_ack_delay; 239 urep->failover_accepted = krep->failover_accepted; 240 urep->flow_control = krep->flow_control; 241 urep->rnr_retry_count = krep->rnr_retry_count; 242 urep->srq = krep->srq; 243} 244 245static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, 246 struct ib_cm_sidr_rep_event_param *krep) 247{ 248 urep->status = krep->status; 249 urep->qkey = krep->qkey; 250 urep->qpn = krep->qpn; 251}; 252 253static int ib_ucm_event_process(struct ib_cm_event *evt, 254 struct ib_ucm_event *uvt) 255{ 256 void *info = NULL; 257 258 switch (evt->event) { 259 case IB_CM_REQ_RECEIVED: 260 ib_ucm_event_req_get(&uvt->resp.u.req_resp, 261 &evt->param.req_rcvd); 262 uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; 263 uvt->resp.present = IB_UCM_PRES_PRIMARY; 264 uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? 265 IB_UCM_PRES_ALTERNATE : 0); 266 break; 267 case IB_CM_REP_RECEIVED: 268 ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, 269 &evt->param.rep_rcvd); 270 uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 271 break; 272 case IB_CM_RTU_RECEIVED: 273 uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; 274 uvt->resp.u.send_status = evt->param.send_status; 275 break; 276 case IB_CM_DREQ_RECEIVED: 277 uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; 278 uvt->resp.u.send_status = evt->param.send_status; 279 break; 280 case IB_CM_DREP_RECEIVED: 281 uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; 282 uvt->resp.u.send_status = evt->param.send_status; 283 break; 284 case IB_CM_MRA_RECEIVED: 285 uvt->resp.u.mra_resp.timeout = 286 evt->param.mra_rcvd.service_timeout; 287 uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; 288 break; 289 case IB_CM_REJ_RECEIVED: 290 uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; 291 uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 292 uvt->info_len = evt->param.rej_rcvd.ari_length; 293 info = evt->param.rej_rcvd.ari; 294 break; 295 case IB_CM_LAP_RECEIVED: 296 ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, 297 evt->param.lap_rcvd.alternate_path); 298 uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; 299 uvt->resp.present = IB_UCM_PRES_ALTERNATE; 300 break; 301 case IB_CM_APR_RECEIVED: 302 uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; 303 uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; 304 uvt->info_len = evt->param.apr_rcvd.info_len; 305 info = evt->param.apr_rcvd.apr_info; 306 break; 307 case IB_CM_SIDR_REQ_RECEIVED: 308 uvt->resp.u.sidr_req_resp.pkey = 309 evt->param.sidr_req_rcvd.pkey; 310 uvt->resp.u.sidr_req_resp.port = 311 evt->param.sidr_req_rcvd.port; 312 uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; 313 break; 314 case IB_CM_SIDR_REP_RECEIVED: 315 ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, 316 &evt->param.sidr_rep_rcvd); 317 uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 318 uvt->info_len = evt->param.sidr_rep_rcvd.info_len; 319 info = evt->param.sidr_rep_rcvd.info; 320 break; 321 default: 322 uvt->resp.u.send_status = evt->param.send_status; 323 break; 324 } 325 326 if (uvt->data_len) { 327 uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); 328 if (!uvt->data) 329 goto err1; 330 331 uvt->resp.present |= IB_UCM_PRES_DATA; 332 } 333 334 if (uvt->info_len) { 335 uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); 336 if (!uvt->info) 337 goto err2; 338 339 uvt->resp.present |= IB_UCM_PRES_INFO; 340 } 341 return 0; 342 343err2: 344 kfree(uvt->data); 345err1: 346 return -ENOMEM; 347} 348 349static int ib_ucm_event_handler(struct ib_cm_id *cm_id, 350 struct ib_cm_event *event) 351{ 352 struct ib_ucm_event *uevent; 353 struct ib_ucm_context *ctx; 354 int result = 0; 355 356 ctx = cm_id->context; 357 358 uevent = kzalloc(sizeof *uevent, GFP_KERNEL); 359 if (!uevent) 360 goto err1; 361 362 uevent->ctx = ctx; 363 uevent->cm_id = cm_id; 364 uevent->resp.uid = ctx->uid; 365 uevent->resp.id = ctx->id; 366 uevent->resp.event = event->event; 367 368 result = ib_ucm_event_process(event, uevent); 369 if (result) 370 goto err2; 371 372 mutex_lock(&ctx->file->file_mutex); 373 list_add_tail(&uevent->file_list, &ctx->file->events); 374 list_add_tail(&uevent->ctx_list, &ctx->events); 375 wake_up_interruptible(&ctx->file->poll_wait); 376 mutex_unlock(&ctx->file->file_mutex); 377 return 0; 378 379err2: 380 kfree(uevent); 381err1: 382 /* Destroy new cm_id's */ 383 return ib_ucm_new_cm_id(event->event); 384} 385 386static ssize_t ib_ucm_event(struct ib_ucm_file *file, 387 const char __user *inbuf, 388 int in_len, int out_len) 389{ 390 struct ib_ucm_context *ctx; 391 struct ib_ucm_event_get cmd; 392 struct ib_ucm_event *uevent; 393 int result = 0; 394 395 if (out_len < sizeof(struct ib_ucm_event_resp)) 396 return -ENOSPC; 397 398 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 399 return -EFAULT; 400 401 mutex_lock(&file->file_mutex); 402 while (list_empty(&file->events)) { 403 mutex_unlock(&file->file_mutex); 404 405 if (file->filp->f_flags & O_NONBLOCK) 406 return -EAGAIN; 407 408 if (wait_event_interruptible(file->poll_wait, 409 !list_empty(&file->events))) 410 return -ERESTARTSYS; 411 412 mutex_lock(&file->file_mutex); 413 } 414 415 uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); 416 417 if (ib_ucm_new_cm_id(uevent->resp.event)) { 418 ctx = ib_ucm_ctx_alloc(file); 419 if (!ctx) { 420 result = -ENOMEM; 421 goto done; 422 } 423 424 ctx->cm_id = uevent->cm_id; 425 ctx->cm_id->context = ctx; 426 uevent->resp.id = ctx->id; 427 } 428 429 if (copy_to_user((void __user *)(unsigned long)cmd.response, 430 &uevent->resp, sizeof(uevent->resp))) { 431 result = -EFAULT; 432 goto done; 433 } 434 435 if (uevent->data) { 436 if (cmd.data_len < uevent->data_len) { 437 result = -ENOMEM; 438 goto done; 439 } 440 if (copy_to_user((void __user *)(unsigned long)cmd.data, 441 uevent->data, uevent->data_len)) { 442 result = -EFAULT; 443 goto done; 444 } 445 } 446 447 if (uevent->info) { 448 if (cmd.info_len < uevent->info_len) { 449 result = -ENOMEM; 450 goto done; 451 } 452 if (copy_to_user((void __user *)(unsigned long)cmd.info, 453 uevent->info, uevent->info_len)) { 454 result = -EFAULT; 455 goto done; 456 } 457 } 458 459 list_del(&uevent->file_list); 460 list_del(&uevent->ctx_list); 461 uevent->ctx->events_reported++; 462 463 kfree(uevent->data); 464 kfree(uevent->info); 465 kfree(uevent); 466done: 467 mutex_unlock(&file->file_mutex); 468 return result; 469} 470 471static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, 472 const char __user *inbuf, 473 int in_len, int out_len) 474{ 475 struct ib_ucm_create_id cmd; 476 struct ib_ucm_create_id_resp resp; 477 struct ib_ucm_context *ctx; 478 int result; 479 480 if (out_len < sizeof(resp)) 481 return -ENOSPC; 482 483 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 484 return -EFAULT; 485 486 mutex_lock(&file->file_mutex); 487 ctx = ib_ucm_ctx_alloc(file); 488 mutex_unlock(&file->file_mutex); 489 if (!ctx) 490 return -ENOMEM; 491 492 ctx->uid = cmd.uid; 493 ctx->cm_id = ib_create_cm_id(file->device->ib_dev, 494 ib_ucm_event_handler, ctx); 495 if (IS_ERR(ctx->cm_id)) { 496 result = PTR_ERR(ctx->cm_id); 497 goto err1; 498 } 499 500 resp.id = ctx->id; 501 if (copy_to_user((void __user *)(unsigned long)cmd.response, 502 &resp, sizeof(resp))) { 503 result = -EFAULT; 504 goto err2; 505 } 506 return 0; 507 508err2: 509 ib_destroy_cm_id(ctx->cm_id); 510err1: 511 mutex_lock(&ctx_id_mutex); 512 idr_remove(&ctx_id_table, ctx->id); 513 mutex_unlock(&ctx_id_mutex); 514 kfree(ctx); 515 return result; 516} 517 518static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, 519 const char __user *inbuf, 520 int in_len, int out_len) 521{ 522 struct ib_ucm_destroy_id cmd; 523 struct ib_ucm_destroy_id_resp resp; 524 struct ib_ucm_context *ctx; 525 int result = 0; 526 527 if (out_len < sizeof(resp)) 528 return -ENOSPC; 529 530 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 531 return -EFAULT; 532 533 mutex_lock(&ctx_id_mutex); 534 ctx = idr_find(&ctx_id_table, cmd.id); 535 if (!ctx) 536 ctx = ERR_PTR(-ENOENT); 537 else if (ctx->file != file) 538 ctx = ERR_PTR(-EINVAL); 539 else 540 idr_remove(&ctx_id_table, ctx->id); 541 mutex_unlock(&ctx_id_mutex); 542 543 if (IS_ERR(ctx)) 544 return PTR_ERR(ctx); 545 546 ib_ucm_ctx_put(ctx); 547 wait_for_completion(&ctx->comp); 548 549 /* No new events will be generated after destroying the cm_id. */ 550 ib_destroy_cm_id(ctx->cm_id); 551 /* Cleanup events not yet reported to the user. */ 552 ib_ucm_cleanup_events(ctx); 553 554 resp.events_reported = ctx->events_reported; 555 if (copy_to_user((void __user *)(unsigned long)cmd.response, 556 &resp, sizeof(resp))) 557 result = -EFAULT; 558 559 kfree(ctx); 560 return result; 561} 562 563static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, 564 const char __user *inbuf, 565 int in_len, int out_len) 566{ 567 struct ib_ucm_attr_id_resp resp; 568 struct ib_ucm_attr_id cmd; 569 struct ib_ucm_context *ctx; 570 int result = 0; 571 572 if (out_len < sizeof(resp)) 573 return -ENOSPC; 574 575 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 576 return -EFAULT; 577 578 ctx = ib_ucm_ctx_get(file, cmd.id); 579 if (IS_ERR(ctx)) 580 return PTR_ERR(ctx); 581 582 resp.service_id = ctx->cm_id->service_id; 583 resp.service_mask = ctx->cm_id->service_mask; 584 resp.local_id = ctx->cm_id->local_id; 585 resp.remote_id = ctx->cm_id->remote_id; 586 587 if (copy_to_user((void __user *)(unsigned long)cmd.response, 588 &resp, sizeof(resp))) 589 result = -EFAULT; 590 591 ib_ucm_ctx_put(ctx); 592 return result; 593} 594 595static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, 596 const char __user *inbuf, 597 int in_len, int out_len) 598{ 599 struct ib_uverbs_qp_attr resp; 600 struct ib_ucm_init_qp_attr cmd; 601 struct ib_ucm_context *ctx; 602 struct ib_qp_attr qp_attr; 603 int result = 0; 604 605 if (out_len < sizeof(resp)) 606 return -ENOSPC; 607 608 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 609 return -EFAULT; 610 611 ctx = ib_ucm_ctx_get(file, cmd.id); 612 if (IS_ERR(ctx)) 613 return PTR_ERR(ctx); 614 615 resp.qp_attr_mask = 0; 616 memset(&qp_attr, 0, sizeof qp_attr); 617 qp_attr.qp_state = cmd.qp_state; 618 result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); 619 if (result) 620 goto out; 621 622 ib_copy_qp_attr_to_user(&resp, &qp_attr); 623 624 if (copy_to_user((void __user *)(unsigned long)cmd.response, 625 &resp, sizeof(resp))) 626 result = -EFAULT; 627 628out: 629 ib_ucm_ctx_put(ctx); 630 return result; 631} 632 633static int ucm_validate_listen(__be64 service_id, __be64 service_mask) 634{ 635 service_id &= service_mask; 636 637 if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) || 638 ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID)) 639 return -EINVAL; 640 641 return 0; 642} 643 644static ssize_t ib_ucm_listen(struct ib_ucm_file *file, 645 const char __user *inbuf, 646 int in_len, int out_len) 647{ 648 struct ib_ucm_listen cmd; 649 struct ib_ucm_context *ctx; 650 int result; 651 652 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 653 return -EFAULT; 654 655 ctx = ib_ucm_ctx_get(file, cmd.id); 656 if (IS_ERR(ctx)) 657 return PTR_ERR(ctx); 658 659 result = ucm_validate_listen(cmd.service_id, cmd.service_mask); 660 if (result) 661 goto out; 662 663 result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); 664out: 665 ib_ucm_ctx_put(ctx); 666 return result; 667} 668 669static ssize_t ib_ucm_notify(struct ib_ucm_file *file, 670 const char __user *inbuf, 671 int in_len, int out_len) 672{ 673 struct ib_ucm_notify cmd; 674 struct ib_ucm_context *ctx; 675 int result; 676 677 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 678 return -EFAULT; 679 680 ctx = ib_ucm_ctx_get(file, cmd.id); 681 if (IS_ERR(ctx)) 682 return PTR_ERR(ctx); 683 684 result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event); 685 ib_ucm_ctx_put(ctx); 686 return result; 687} 688 689static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) 690{ 691 void *data; 692 693 *dest = NULL; 694 695 if (!len) 696 return 0; 697 698 data = memdup_user((void __user *)(unsigned long)src, len); 699 if (IS_ERR(data)) 700 return PTR_ERR(data); 701 702 *dest = data; 703 return 0; 704} 705 706static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) 707{ 708 struct ib_user_path_rec upath; 709 struct ib_sa_path_rec *sa_path; 710 711 *path = NULL; 712 713 if (!src) 714 return 0; 715 716 sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); 717 if (!sa_path) 718 return -ENOMEM; 719 720 if (copy_from_user(&upath, (void __user *)(unsigned long)src, 721 sizeof(upath))) { 722 723 kfree(sa_path); 724 return -EFAULT; 725 } 726 727 ib_copy_path_rec_from_user(sa_path, &upath); 728 *path = sa_path; 729 return 0; 730} 731 732static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, 733 const char __user *inbuf, 734 int in_len, int out_len) 735{ 736 struct ib_cm_req_param param; 737 struct ib_ucm_context *ctx; 738 struct ib_ucm_req cmd; 739 int result; 740 741 param.private_data = NULL; 742 param.primary_path = NULL; 743 param.alternate_path = NULL; 744 745 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 746 return -EFAULT; 747 748 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); 749 if (result) 750 goto done; 751 752 result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); 753 if (result) 754 goto done; 755 756 result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); 757 if (result) 758 goto done; 759 760 param.private_data_len = cmd.len; 761 param.service_id = cmd.sid; 762 param.qp_num = cmd.qpn; 763 param.qp_type = cmd.qp_type; 764 param.starting_psn = cmd.psn; 765 param.peer_to_peer = cmd.peer_to_peer; 766 param.responder_resources = cmd.responder_resources; 767 param.initiator_depth = cmd.initiator_depth; 768 param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; 769 param.flow_control = cmd.flow_control; 770 param.local_cm_response_timeout = cmd.local_cm_response_timeout; 771 param.retry_count = cmd.retry_count; 772 param.rnr_retry_count = cmd.rnr_retry_count; 773 param.max_cm_retries = cmd.max_cm_retries; 774 param.srq = cmd.srq; 775 776 ctx = ib_ucm_ctx_get(file, cmd.id); 777 if (!IS_ERR(ctx)) { 778 result = ib_send_cm_req(ctx->cm_id, ¶m); 779 ib_ucm_ctx_put(ctx); 780 } else 781 result = PTR_ERR(ctx); 782 783done: 784 kfree(param.private_data); 785 kfree(param.primary_path); 786 kfree(param.alternate_path); 787 return result; 788} 789 790static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, 791 const char __user *inbuf, 792 int in_len, int out_len) 793{ 794 struct ib_cm_rep_param param; 795 struct ib_ucm_context *ctx; 796 struct ib_ucm_rep cmd; 797 int result; 798 799 param.private_data = NULL; 800 801 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 802 return -EFAULT; 803 804 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); 805 if (result) 806 return result; 807 808 param.qp_num = cmd.qpn; 809 param.starting_psn = cmd.psn; 810 param.private_data_len = cmd.len; 811 param.responder_resources = cmd.responder_resources; 812 param.initiator_depth = cmd.initiator_depth; 813 param.failover_accepted = cmd.failover_accepted; 814 param.flow_control = cmd.flow_control; 815 param.rnr_retry_count = cmd.rnr_retry_count; 816 param.srq = cmd.srq; 817 818 ctx = ib_ucm_ctx_get(file, cmd.id); 819 if (!IS_ERR(ctx)) { 820 ctx->uid = cmd.uid; 821 result = ib_send_cm_rep(ctx->cm_id, ¶m); 822 ib_ucm_ctx_put(ctx); 823 } else 824 result = PTR_ERR(ctx); 825 826 kfree(param.private_data); 827 return result; 828} 829 830static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, 831 const char __user *inbuf, int in_len, 832 int (*func)(struct ib_cm_id *cm_id, 833 const void *private_data, 834 u8 private_data_len)) 835{ 836 struct ib_ucm_private_data cmd; 837 struct ib_ucm_context *ctx; 838 const void *private_data = NULL; 839 int result; 840 841 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 842 return -EFAULT; 843 844 result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); 845 if (result) 846 return result; 847 848 ctx = ib_ucm_ctx_get(file, cmd.id); 849 if (!IS_ERR(ctx)) { 850 result = func(ctx->cm_id, private_data, cmd.len); 851 ib_ucm_ctx_put(ctx); 852 } else 853 result = PTR_ERR(ctx); 854 855 kfree(private_data); 856 return result; 857} 858 859static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, 860 const char __user *inbuf, 861 int in_len, int out_len) 862{ 863 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); 864} 865 866static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, 867 const char __user *inbuf, 868 int in_len, int out_len) 869{ 870 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); 871} 872 873static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, 874 const char __user *inbuf, 875 int in_len, int out_len) 876{ 877 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); 878} 879 880static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, 881 const char __user *inbuf, int in_len, 882 int (*func)(struct ib_cm_id *cm_id, 883 int status, 884 const void *info, 885 u8 info_len, 886 const void *data, 887 u8 data_len)) 888{ 889 struct ib_ucm_context *ctx; 890 struct ib_ucm_info cmd; 891 const void *data = NULL; 892 const void *info = NULL; 893 int result; 894 895 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 896 return -EFAULT; 897 898 result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); 899 if (result) 900 goto done; 901 902 result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); 903 if (result) 904 goto done; 905 906 ctx = ib_ucm_ctx_get(file, cmd.id); 907 if (!IS_ERR(ctx)) { 908 result = func(ctx->cm_id, cmd.status, info, cmd.info_len, 909 data, cmd.data_len); 910 ib_ucm_ctx_put(ctx); 911 } else 912 result = PTR_ERR(ctx); 913 914done: 915 kfree(data); 916 kfree(info); 917 return result; 918} 919 920static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, 921 const char __user *inbuf, 922 int in_len, int out_len) 923{ 924 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); 925} 926 927static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, 928 const char __user *inbuf, 929 int in_len, int out_len) 930{ 931 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); 932} 933 934static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, 935 const char __user *inbuf, 936 int in_len, int out_len) 937{ 938 struct ib_ucm_context *ctx; 939 struct ib_ucm_mra cmd; 940 const void *data = NULL; 941 int result; 942 943 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 944 return -EFAULT; 945 946 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); 947 if (result) 948 return result; 949 950 ctx = ib_ucm_ctx_get(file, cmd.id); 951 if (!IS_ERR(ctx)) { 952 result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); 953 ib_ucm_ctx_put(ctx); 954 } else 955 result = PTR_ERR(ctx); 956 957 kfree(data); 958 return result; 959} 960 961static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, 962 const char __user *inbuf, 963 int in_len, int out_len) 964{ 965 struct ib_ucm_context *ctx; 966 struct ib_sa_path_rec *path = NULL; 967 struct ib_ucm_lap cmd; 968 const void *data = NULL; 969 int result; 970 971 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 972 return -EFAULT; 973 974 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); 975 if (result) 976 goto done; 977 978 result = ib_ucm_path_get(&path, cmd.path); 979 if (result) 980 goto done; 981 982 ctx = ib_ucm_ctx_get(file, cmd.id); 983 if (!IS_ERR(ctx)) { 984 result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); 985 ib_ucm_ctx_put(ctx); 986 } else 987 result = PTR_ERR(ctx); 988 989done: 990 kfree(data); 991 kfree(path); 992 return result; 993} 994 995static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, 996 const char __user *inbuf, 997 int in_len, int out_len) 998{ 999 struct ib_cm_sidr_req_param param; 1000 struct ib_ucm_context *ctx; 1001 struct ib_ucm_sidr_req cmd; 1002 int result; 1003 1004 param.private_data = NULL; 1005 param.path = NULL; 1006 1007 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 1008 return -EFAULT; 1009 1010 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); 1011 if (result) 1012 goto done; 1013 1014 result = ib_ucm_path_get(¶m.path, cmd.path); 1015 if (result) 1016 goto done; 1017 1018 param.private_data_len = cmd.len; 1019 param.service_id = cmd.sid; 1020 param.timeout_ms = cmd.timeout; 1021 param.max_cm_retries = cmd.max_cm_retries; 1022 1023 ctx = ib_ucm_ctx_get(file, cmd.id); 1024 if (!IS_ERR(ctx)) { 1025 result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); 1026 ib_ucm_ctx_put(ctx); 1027 } else 1028 result = PTR_ERR(ctx); 1029 1030done: 1031 kfree(param.private_data); 1032 kfree(param.path); 1033 return result; 1034} 1035 1036static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, 1037 const char __user *inbuf, 1038 int in_len, int out_len) 1039{ 1040 struct ib_cm_sidr_rep_param param; 1041 struct ib_ucm_sidr_rep cmd; 1042 struct ib_ucm_context *ctx; 1043 int result; 1044 1045 param.info = NULL; 1046 1047 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 1048 return -EFAULT; 1049 1050 result = ib_ucm_alloc_data(¶m.private_data, 1051 cmd.data, cmd.data_len); 1052 if (result) 1053 goto done; 1054 1055 result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); 1056 if (result) 1057 goto done; 1058 1059 param.qp_num = cmd.qpn; 1060 param.qkey = cmd.qkey; 1061 param.status = cmd.status; 1062 param.info_length = cmd.info_len; 1063 param.private_data_len = cmd.data_len; 1064 1065 ctx = ib_ucm_ctx_get(file, cmd.id); 1066 if (!IS_ERR(ctx)) { 1067 result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); 1068 ib_ucm_ctx_put(ctx); 1069 } else 1070 result = PTR_ERR(ctx); 1071 1072done: 1073 kfree(param.private_data); 1074 kfree(param.info); 1075 return result; 1076} 1077 1078static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, 1079 const char __user *inbuf, 1080 int in_len, int out_len) = { 1081 [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, 1082 [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, 1083 [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, 1084 [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, 1085 [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify, 1086 [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, 1087 [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, 1088 [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, 1089 [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, 1090 [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, 1091 [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, 1092 [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, 1093 [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, 1094 [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, 1095 [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, 1096 [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, 1097 [IB_USER_CM_CMD_EVENT] = ib_ucm_event, 1098 [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, 1099}; 1100 1101static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, 1102 size_t len, loff_t *pos) 1103{ 1104 struct ib_ucm_file *file = filp->private_data; 1105 struct ib_ucm_cmd_hdr hdr; 1106 ssize_t result; 1107 1108 if (WARN_ON_ONCE(!ib_safe_file_access(filp))) 1109 return -EACCES; 1110 1111 if (len < sizeof(hdr)) 1112 return -EINVAL; 1113 1114 if (copy_from_user(&hdr, buf, sizeof(hdr))) 1115 return -EFAULT; 1116 1117 if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) 1118 return -EINVAL; 1119 1120 if (hdr.in + sizeof(hdr) > len) 1121 return -EINVAL; 1122 1123 result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), 1124 hdr.in, hdr.out); 1125 if (!result) 1126 result = len; 1127 1128 return result; 1129} 1130 1131static unsigned int ib_ucm_poll(struct file *filp, 1132 struct poll_table_struct *wait) 1133{ 1134 struct ib_ucm_file *file = filp->private_data; 1135 unsigned int mask = 0; 1136 1137 poll_wait(filp, &file->poll_wait, wait); 1138 1139 if (!list_empty(&file->events)) 1140 mask = POLLIN | POLLRDNORM; 1141 1142 return mask; 1143} 1144 1145/* 1146 * ib_ucm_open() does not need the BKL: 1147 * 1148 * - no global state is referred to; 1149 * - there is no ioctl method to race against; 1150 * - no further module initialization is required for open to work 1151 * after the device is registered. 1152 */ 1153static int ib_ucm_open(struct inode *inode, struct file *filp) 1154{ 1155 struct ib_ucm_file *file; 1156 1157 file = kmalloc(sizeof(*file), GFP_KERNEL); 1158 if (!file) 1159 return -ENOMEM; 1160 1161 INIT_LIST_HEAD(&file->events); 1162 INIT_LIST_HEAD(&file->ctxs); 1163 init_waitqueue_head(&file->poll_wait); 1164 1165 mutex_init(&file->file_mutex); 1166 1167 filp->private_data = file; 1168 file->filp = filp; 1169 file->device = container_of(inode->i_cdev->si_drv1, struct ib_ucm_device, cdev); 1170 1171 return nonseekable_open(inode, filp); 1172} 1173 1174static int ib_ucm_close(struct inode *inode, struct file *filp) 1175{ 1176 struct ib_ucm_file *file = filp->private_data; 1177 struct ib_ucm_context *ctx; 1178 1179 mutex_lock(&file->file_mutex); 1180 while (!list_empty(&file->ctxs)) { 1181 ctx = list_entry(file->ctxs.next, 1182 struct ib_ucm_context, file_list); 1183 mutex_unlock(&file->file_mutex); 1184 1185 mutex_lock(&ctx_id_mutex); 1186 idr_remove(&ctx_id_table, ctx->id); 1187 mutex_unlock(&ctx_id_mutex); 1188 1189 ib_destroy_cm_id(ctx->cm_id); 1190 ib_ucm_cleanup_events(ctx); 1191 kfree(ctx); 1192 1193 mutex_lock(&file->file_mutex); 1194 } 1195 mutex_unlock(&file->file_mutex); 1196 kfree(file); 1197 return 0; 1198} 1199 1200static DECLARE_BITMAP(overflow_map, IB_UCM_MAX_DEVICES); 1201static void ib_ucm_release_dev(struct device *dev) 1202{ 1203 struct ib_ucm_device *ucm_dev; 1204 1205 ucm_dev = container_of(dev, struct ib_ucm_device, dev); 1206 cdev_del(&ucm_dev->cdev); 1207 if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) 1208 clear_bit(ucm_dev->devnum, dev_map); 1209 else 1210 clear_bit(ucm_dev->devnum - IB_UCM_MAX_DEVICES, overflow_map); 1211 kfree(ucm_dev); 1212} 1213 1214static const struct file_operations ucm_fops = { 1215 .owner = THIS_MODULE, 1216 .open = ib_ucm_open, 1217 .release = ib_ucm_close, 1218 .write = ib_ucm_write, 1219 .poll = ib_ucm_poll, 1220 .llseek = no_llseek, 1221}; 1222 1223static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, 1224 char *buf) 1225{ 1226 struct ib_ucm_device *ucm_dev; 1227 1228 ucm_dev = container_of(dev, struct ib_ucm_device, dev); 1229 return sprintf(buf, "%s\n", ucm_dev->ib_dev->name); 1230} 1231static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); 1232 1233static dev_t overflow_maj; 1234static int find_overflow_devnum(void) 1235{ 1236 int ret; 1237 1238 if (!overflow_maj) { 1239 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES, 1240 "infiniband_cm"); 1241 if (ret) { 1242 pr_err("ucm: couldn't register dynamic device number\n"); 1243 return ret; 1244 } 1245 } 1246 1247 ret = find_first_zero_bit(overflow_map, IB_UCM_MAX_DEVICES); 1248 if (ret >= IB_UCM_MAX_DEVICES) 1249 return -1; 1250 1251 return ret; 1252} 1253 1254static void ib_ucm_add_one(struct ib_device *device) 1255{ 1256 int devnum; 1257 dev_t base; 1258 struct ib_ucm_device *ucm_dev; 1259 1260 if (!device->alloc_ucontext || !rdma_cap_ib_cm(device, 1)) 1261 return; 1262 1263 ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); 1264 if (!ucm_dev) 1265 return; 1266 1267 ucm_dev->ib_dev = device; 1268 1269 devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); 1270 if (devnum >= IB_UCM_MAX_DEVICES) { 1271 devnum = find_overflow_devnum(); 1272 if (devnum < 0) 1273 goto err; 1274 1275 ucm_dev->devnum = devnum + IB_UCM_MAX_DEVICES; 1276 base = devnum + overflow_maj; 1277 set_bit(devnum, overflow_map); 1278 } else { 1279 ucm_dev->devnum = devnum; 1280 base = devnum + IB_UCM_BASE_DEV; 1281 set_bit(devnum, dev_map); 1282 } 1283 1284 cdev_init(&ucm_dev->cdev, &ucm_fops); 1285 ucm_dev->cdev.owner = THIS_MODULE; 1286 kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum); 1287 if (cdev_add(&ucm_dev->cdev, base, 1)) 1288 goto err; 1289 1290 ucm_dev->dev.class = &cm_class; 1291 ucm_dev->dev.parent = device->dma_device; 1292 ucm_dev->dev.devt = ucm_dev->cdev.dev; 1293 ucm_dev->dev.release = ib_ucm_release_dev; 1294 dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum); 1295 if (device_register(&ucm_dev->dev)) 1296 goto err_cdev; 1297 1298 if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev)) 1299 goto err_dev; 1300 1301 ib_set_client_data(device, &ucm_client, ucm_dev); 1302 return; 1303 1304err_dev: 1305 device_unregister(&ucm_dev->dev); 1306err_cdev: 1307 cdev_del(&ucm_dev->cdev); 1308 if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) 1309 clear_bit(devnum, dev_map); 1310 else 1311 clear_bit(devnum, overflow_map); 1312err: 1313 kfree(ucm_dev); 1314 return; 1315} 1316 1317static void ib_ucm_remove_one(struct ib_device *device, void *client_data) 1318{ 1319 struct ib_ucm_device *ucm_dev = client_data; 1320 1321 if (!ucm_dev) 1322 return; 1323 1324 device_unregister(&ucm_dev->dev); 1325} 1326 1327static CLASS_ATTR_STRING(abi_version, S_IRUGO, 1328 __stringify(IB_USER_CM_ABI_VERSION)); 1329 1330static int __init ib_ucm_init(void) 1331{ 1332 int ret; 1333 1334 ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, 1335 "infiniband_cm"); 1336 if (ret) { 1337 pr_err("ucm: couldn't register device number\n"); 1338 goto error1; 1339 } 1340 1341 ret = class_create_file(&cm_class, &class_attr_abi_version.attr); 1342 if (ret) { 1343 pr_err("ucm: couldn't create abi_version attribute\n"); 1344 goto error2; 1345 } 1346 1347 ret = ib_register_client(&ucm_client); 1348 if (ret) { 1349 pr_err("ucm: couldn't register client\n"); 1350 goto error3; 1351 } 1352 return 0; 1353 1354error3: 1355 class_remove_file(&cm_class, &class_attr_abi_version.attr); 1356error2: 1357 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); 1358error1: 1359 return ret; 1360} 1361 1362static void __exit ib_ucm_cleanup(void) 1363{ 1364 ib_unregister_client(&ucm_client); 1365 class_remove_file(&cm_class, &class_attr_abi_version.attr); 1366 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); 1367 if (overflow_maj) 1368 unregister_chrdev_region(overflow_maj, IB_UCM_MAX_DEVICES); 1369 idr_destroy(&ctx_id_table); 1370} 1371 1372module_init_order(ib_ucm_init, SI_ORDER_FIFTH); 1373module_exit_order(ib_ucm_cleanup, SI_ORDER_FIFTH); 1374