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