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_cm.h> 52#include <rdma/ib_user_cm.h> 53#include <rdma/ib_marshall.h> 54 55MODULE_AUTHOR("Libor Michalek"); 56MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); 57MODULE_LICENSE("Dual BSD/GPL"); 58 59struct ib_ucm_device { 60 int devnum; 61 struct cdev cdev; 62 struct device dev; 63 struct ib_device *ib_dev; 64}; 65 66struct ib_ucm_file { 67 struct mutex file_mutex; 68 struct file *filp; 69 struct ib_ucm_device *device; 70 71 struct list_head ctxs; 72 struct list_head events; 73 wait_queue_head_t poll_wait; 74}; 75 76struct ib_ucm_context { 77 int id; 78 struct completion comp; 79 atomic_t ref; 80 int events_reported; 81 82 struct ib_ucm_file *file; 83 struct ib_cm_id *cm_id; 84 __u64 uid; 85 86 struct list_head events; /* list of pending events. */ 87 struct list_head file_list; /* member in file ctx list */ 88}; 89 90struct ib_ucm_event { 91 struct ib_ucm_context *ctx; 92 struct list_head file_list; /* member in file event list */ 93 struct list_head ctx_list; /* member in ctx event list */ 94 95 struct ib_cm_id *cm_id; 96 struct ib_ucm_event_resp resp; 97 void *data; 98 void *info; 99 int data_len; 100 int info_len; 101}; 102 103enum { 104 IB_UCM_MAJOR = 231, 105 IB_UCM_BASE_MINOR = 224, 106 IB_UCM_MAX_DEVICES = 32 107}; 108 109#define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) 110 111static void ib_ucm_add_one(struct ib_device *device); 112static void ib_ucm_remove_one(struct ib_device *device); 113 114static struct ib_client ucm_client = { 115 .name = "ucm", 116 .add = ib_ucm_add_one, 117 .remove = ib_ucm_remove_one 118}; 119 120static DEFINE_MUTEX(ctx_id_mutex); 121static DEFINE_IDR(ctx_id_table); 122static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); 123 124static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) 125{ 126 struct ib_ucm_context *ctx; 127 128 mutex_lock(&ctx_id_mutex); 129 ctx = idr_find(&ctx_id_table, id); 130 if (!ctx) 131 ctx = ERR_PTR(-ENOENT); 132 else if (ctx->file != file) 133 ctx = ERR_PTR(-EINVAL); 134 else 135 atomic_inc(&ctx->ref); 136 mutex_unlock(&ctx_id_mutex); 137 138 return ctx; 139} 140 141static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) 142{ 143 if (atomic_dec_and_test(&ctx->ref)) 144 complete(&ctx->comp); 145} 146 147static inline int ib_ucm_new_cm_id(int event) 148{ 149 return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; 150} 151 152static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) 153{ 154 struct ib_ucm_event *uevent; 155 156 mutex_lock(&ctx->file->file_mutex); 157 list_del(&ctx->file_list); 158 while (!list_empty(&ctx->events)) { 159 160 uevent = list_entry(ctx->events.next, 161 struct ib_ucm_event, ctx_list); 162 list_del(&uevent->file_list); 163 list_del(&uevent->ctx_list); 164 mutex_unlock(&ctx->file->file_mutex); 165 166 /* clear incoming connections. */ 167 if (ib_ucm_new_cm_id(uevent->resp.event)) 168 ib_destroy_cm_id(uevent->cm_id); 169 170 kfree(uevent); 171 mutex_lock(&ctx->file->file_mutex); 172 } 173 mutex_unlock(&ctx->file->file_mutex); 174} 175 176static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) 177{ 178 struct ib_ucm_context *ctx; 179 180 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 181 if (!ctx) 182 return NULL; 183 184 atomic_set(&ctx->ref, 1); 185 init_completion(&ctx->comp); 186 ctx->file = file; 187 INIT_LIST_HEAD(&ctx->events); 188 189 mutex_lock(&ctx_id_mutex); 190 ctx->id = idr_alloc(&ctx_id_table, ctx, 0, 0, GFP_KERNEL); 191 mutex_unlock(&ctx_id_mutex); 192 if (ctx->id < 0) 193 goto error; 194 195 list_add_tail(&ctx->file_list, &file->ctxs); 196 return ctx; 197 198error: 199 kfree(ctx); 200 return NULL; 201} 202 203static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, 204 struct ib_cm_req_event_param *kreq) 205{ 206 ureq->remote_ca_guid = kreq->remote_ca_guid; 207 ureq->remote_qkey = kreq->remote_qkey; 208 ureq->remote_qpn = kreq->remote_qpn; 209 ureq->qp_type = kreq->qp_type; 210 ureq->starting_psn = kreq->starting_psn; 211 ureq->responder_resources = kreq->responder_resources; 212 ureq->initiator_depth = kreq->initiator_depth; 213 ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; 214 ureq->flow_control = kreq->flow_control; 215 ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; 216 ureq->retry_count = kreq->retry_count; 217 ureq->rnr_retry_count = kreq->rnr_retry_count; 218 ureq->srq = kreq->srq; 219 ureq->port = kreq->port; 220 221 ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); 222 if (kreq->alternate_path) 223 ib_copy_path_rec_to_user(&ureq->alternate_path, 224 kreq->alternate_path); 225} 226 227static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, 228 struct ib_cm_rep_event_param *krep) 229{ 230 urep->remote_ca_guid = krep->remote_ca_guid; 231 urep->remote_qkey = krep->remote_qkey; 232 urep->remote_qpn = krep->remote_qpn; 233 urep->starting_psn = krep->starting_psn; 234 urep->responder_resources = krep->responder_resources; 235 urep->initiator_depth = krep->initiator_depth; 236 urep->target_ack_delay = krep->target_ack_delay; 237 urep->failover_accepted = krep->failover_accepted; 238 urep->flow_control = krep->flow_control; 239 urep->rnr_retry_count = krep->rnr_retry_count; 240 urep->srq = krep->srq; 241} 242 243static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, 244 struct ib_cm_sidr_rep_event_param *krep) 245{ 246 urep->status = krep->status; 247 urep->qkey = krep->qkey; 248 urep->qpn = krep->qpn; 249}; 250 251static int ib_ucm_event_process(struct ib_cm_event *evt, 252 struct ib_ucm_event *uvt) 253{ 254 void *info = NULL; 255 256 switch (evt->event) { 257 case IB_CM_REQ_RECEIVED: 258 ib_ucm_event_req_get(&uvt->resp.u.req_resp, 259 &evt->param.req_rcvd); 260 uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; 261 uvt->resp.present = IB_UCM_PRES_PRIMARY; 262 uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? 263 IB_UCM_PRES_ALTERNATE : 0); 264 break; 265 case IB_CM_REP_RECEIVED: 266 ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, 267 &evt->param.rep_rcvd); 268 uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 269 break; 270 case IB_CM_RTU_RECEIVED: 271 uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; 272 uvt->resp.u.send_status = evt->param.send_status; 273 break; 274 case IB_CM_DREQ_RECEIVED: 275 uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; 276 uvt->resp.u.send_status = evt->param.send_status; 277 break; 278 case IB_CM_DREP_RECEIVED: 279 uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; 280 uvt->resp.u.send_status = evt->param.send_status; 281 break; 282 case IB_CM_MRA_RECEIVED: 283 uvt->resp.u.mra_resp.timeout = 284 evt->param.mra_rcvd.service_timeout; 285 uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; 286 break; 287 case IB_CM_REJ_RECEIVED: 288 uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; 289 uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 290 uvt->info_len = evt->param.rej_rcvd.ari_length; 291 info = evt->param.rej_rcvd.ari; 292 break; 293 case IB_CM_LAP_RECEIVED: 294 ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, 295 evt->param.lap_rcvd.alternate_path); 296 uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; 297 uvt->resp.present = IB_UCM_PRES_ALTERNATE; 298 break; 299 case IB_CM_APR_RECEIVED: 300 uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; 301 uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; 302 uvt->info_len = evt->param.apr_rcvd.info_len; 303 info = evt->param.apr_rcvd.apr_info; 304 break; 305 case IB_CM_SIDR_REQ_RECEIVED: 306 uvt->resp.u.sidr_req_resp.pkey = 307 evt->param.sidr_req_rcvd.pkey; 308 uvt->resp.u.sidr_req_resp.port = 309 evt->param.sidr_req_rcvd.port; 310 uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; 311 break; 312 case IB_CM_SIDR_REP_RECEIVED: 313 ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, 314 &evt->param.sidr_rep_rcvd); 315 uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 316 uvt->info_len = evt->param.sidr_rep_rcvd.info_len; 317 info = evt->param.sidr_rep_rcvd.info; 318 break; 319 default: 320 uvt->resp.u.send_status = evt->param.send_status; 321 break; 322 } 323 324 if (uvt->data_len) { 325 uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); 326 if (!uvt->data) 327 goto err1; 328 329 uvt->resp.present |= IB_UCM_PRES_DATA; 330 } 331 332 if (uvt->info_len) { 333 uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); 334 if (!uvt->info) 335 goto err2; 336 337 uvt->resp.present |= IB_UCM_PRES_INFO; 338 } 339 return 0; 340 341err2: 342 kfree(uvt->data); 343err1: 344 return -ENOMEM; 345} 346 347static int ib_ucm_event_handler(struct ib_cm_id *cm_id, 348 struct ib_cm_event *event) 349{ 350 struct ib_ucm_event *uevent; 351 struct ib_ucm_context *ctx; 352 int result = 0; 353 354 ctx = cm_id->context; 355 356 uevent = kzalloc(sizeof *uevent, GFP_KERNEL); 357 if (!uevent) 358 goto err1; 359 360 uevent->ctx = ctx; 361 uevent->cm_id = cm_id; 362 uevent->resp.uid = ctx->uid; 363 uevent->resp.id = ctx->id; 364 uevent->resp.event = event->event; 365 366 result = ib_ucm_event_process(event, uevent); 367 if (result) 368 goto err2; 369 370 mutex_lock(&ctx->file->file_mutex); 371 list_add_tail(&uevent->file_list, &ctx->file->events); 372 list_add_tail(&uevent->ctx_list, &ctx->events); 373 wake_up_interruptible(&ctx->file->poll_wait); 374 mutex_unlock(&ctx->file->file_mutex); 375 return 0; 376 377err2: 378 kfree(uevent); 379err1: 380 /* Destroy new cm_id's */ 381 return ib_ucm_new_cm_id(event->event); 382} 383 384static ssize_t ib_ucm_event(struct ib_ucm_file *file, 385 const char __user *inbuf, 386 int in_len, int out_len) 387{ 388 struct ib_ucm_context *ctx; 389 struct ib_ucm_event_get cmd; 390 struct ib_ucm_event *uevent; 391 int result = 0; 392 393 if (out_len < sizeof(struct ib_ucm_event_resp)) 394 return -ENOSPC; 395 396 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 397 return -EFAULT; 398 399 mutex_lock(&file->file_mutex); 400 while (list_empty(&file->events)) { 401 mutex_unlock(&file->file_mutex); 402 403 if (file->filp->f_flags & O_NONBLOCK) 404 return -EAGAIN; 405 406 if (wait_event_interruptible(file->poll_wait, 407 !list_empty(&file->events))) 408 return -ERESTARTSYS; 409 410 mutex_lock(&file->file_mutex); 411 } 412 413 uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); 414 415 if (ib_ucm_new_cm_id(uevent->resp.event)) { 416 ctx = ib_ucm_ctx_alloc(file); 417 if (!ctx) { 418 result = -ENOMEM; 419 goto done; 420 } 421 422 ctx->cm_id = uevent->cm_id; 423 ctx->cm_id->context = ctx; 424 uevent->resp.id = ctx->id; 425 } 426 427 if (copy_to_user((void __user *)(unsigned long)cmd.response, 428 &uevent->resp, sizeof(uevent->resp))) { 429 result = -EFAULT; 430 goto done; 431 } 432 433 if (uevent->data) { 434 if (cmd.data_len < uevent->data_len) { 435 result = -ENOMEM; 436 goto done; 437 } 438 if (copy_to_user((void __user *)(unsigned long)cmd.data, 439 uevent->data, uevent->data_len)) { 440 result = -EFAULT; 441 goto done; 442 } 443 } 444 445 if (uevent->info) { 446 if (cmd.info_len < uevent->info_len) { 447 result = -ENOMEM; 448 goto done; 449 } 450 if (copy_to_user((void __user *)(unsigned long)cmd.info, 451 uevent->info, uevent->info_len)) { 452 result = -EFAULT; 453 goto done; 454 } 455 } 456 457 list_del(&uevent->file_list); 458 list_del(&uevent->ctx_list); 459 uevent->ctx->events_reported++; 460 461 kfree(uevent->data); 462 kfree(uevent->info); 463 kfree(uevent); 464done: 465 mutex_unlock(&file->file_mutex); 466 return result; 467} 468 469static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, 470 const char __user *inbuf, 471 int in_len, int out_len) 472{ 473 struct ib_ucm_create_id cmd; 474 struct ib_ucm_create_id_resp resp; 475 struct ib_ucm_context *ctx; 476 int result; 477 478 if (out_len < sizeof(resp)) 479 return -ENOSPC; 480 481 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 482 return -EFAULT; 483 484 mutex_lock(&file->file_mutex); 485 ctx = ib_ucm_ctx_alloc(file); 486 mutex_unlock(&file->file_mutex); 487 if (!ctx) 488 return -ENOMEM; 489 490 ctx->uid = cmd.uid; 491 ctx->cm_id = ib_create_cm_id(file->device->ib_dev, 492 ib_ucm_event_handler, ctx); 493 if (IS_ERR(ctx->cm_id)) { 494 result = PTR_ERR(ctx->cm_id); 495 goto err1; 496 } 497 498 resp.id = ctx->id; 499 if (copy_to_user((void __user *)(unsigned long)cmd.response, 500 &resp, sizeof(resp))) { 501 result = -EFAULT; 502 goto err2; 503 } 504 return 0; 505 506err2: 507 ib_destroy_cm_id(ctx->cm_id); 508err1: 509 mutex_lock(&ctx_id_mutex); 510 idr_remove(&ctx_id_table, ctx->id); 511 mutex_unlock(&ctx_id_mutex); 512 kfree(ctx); 513 return result; 514} 515 516static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, 517 const char __user *inbuf, 518 int in_len, int out_len) 519{ 520 struct ib_ucm_destroy_id cmd; 521 struct ib_ucm_destroy_id_resp resp; 522 struct ib_ucm_context *ctx; 523 int result = 0; 524 525 if (out_len < sizeof(resp)) 526 return -ENOSPC; 527 528 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 529 return -EFAULT; 530 531 mutex_lock(&ctx_id_mutex); 532 ctx = idr_find(&ctx_id_table, cmd.id); 533 if (!ctx) 534 ctx = ERR_PTR(-ENOENT); 535 else if (ctx->file != file) 536 ctx = ERR_PTR(-EINVAL); 537 else 538 idr_remove(&ctx_id_table, ctx->id); 539 mutex_unlock(&ctx_id_mutex); 540 541 if (IS_ERR(ctx)) 542 return PTR_ERR(ctx); 543 544 ib_ucm_ctx_put(ctx); 545 wait_for_completion(&ctx->comp); 546 547 /* No new events will be generated after destroying the cm_id. */ 548 ib_destroy_cm_id(ctx->cm_id); 549 /* Cleanup events not yet reported to the user. */ 550 ib_ucm_cleanup_events(ctx); 551 552 resp.events_reported = ctx->events_reported; 553 if (copy_to_user((void __user *)(unsigned long)cmd.response, 554 &resp, sizeof(resp))) 555 result = -EFAULT; 556 557 kfree(ctx); 558 return result; 559} 560 561static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, 562 const char __user *inbuf, 563 int in_len, int out_len) 564{ 565 struct ib_ucm_attr_id_resp resp; 566 struct ib_ucm_attr_id cmd; 567 struct ib_ucm_context *ctx; 568 int result = 0; 569 570 if (out_len < sizeof(resp)) 571 return -ENOSPC; 572 573 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 574 return -EFAULT; 575 576 ctx = ib_ucm_ctx_get(file, cmd.id); 577 if (IS_ERR(ctx)) 578 return PTR_ERR(ctx); 579 580 resp.service_id = ctx->cm_id->service_id; 581 resp.service_mask = ctx->cm_id->service_mask; 582 resp.local_id = ctx->cm_id->local_id; 583 resp.remote_id = ctx->cm_id->remote_id; 584 585 if (copy_to_user((void __user *)(unsigned long)cmd.response, 586 &resp, sizeof(resp))) 587 result = -EFAULT; 588 589 ib_ucm_ctx_put(ctx); 590 return result; 591} 592 593static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, 594 const char __user *inbuf, 595 int in_len, int out_len) 596{ 597 struct ib_uverbs_qp_attr resp; 598 struct ib_ucm_init_qp_attr cmd; 599 struct ib_ucm_context *ctx; 600 struct ib_qp_attr qp_attr; 601 int result = 0; 602 603 if (out_len < sizeof(resp)) 604 return -ENOSPC; 605 606 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 607 return -EFAULT; 608 609 ctx = ib_ucm_ctx_get(file, cmd.id); 610 if (IS_ERR(ctx)) 611 return PTR_ERR(ctx); 612 613 resp.qp_attr_mask = 0; 614 memset(&qp_attr, 0, sizeof qp_attr); 615 qp_attr.qp_state = cmd.qp_state; 616 result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); 617 if (result) 618 goto out; 619 620 ib_copy_qp_attr_to_user(&resp, &qp_attr); 621 622 if (copy_to_user((void __user *)(unsigned long)cmd.response, 623 &resp, sizeof(resp))) 624 result = -EFAULT; 625 626out: 627 ib_ucm_ctx_put(ctx); 628 return result; 629} 630 631static int ucm_validate_listen(__be64 service_id, __be64 service_mask) 632{ 633 service_id &= service_mask; 634 635 if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) || 636 ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID)) 637 return -EINVAL; 638 639 return 0; 640} 641 642static ssize_t ib_ucm_listen(struct ib_ucm_file *file, 643 const char __user *inbuf, 644 int in_len, int out_len) 645{ 646 struct ib_ucm_listen cmd; 647 struct ib_ucm_context *ctx; 648 int result; 649 650 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 651 return -EFAULT; 652 653 ctx = ib_ucm_ctx_get(file, cmd.id); 654 if (IS_ERR(ctx)) 655 return PTR_ERR(ctx); 656 657 result = ucm_validate_listen(cmd.service_id, cmd.service_mask); 658 if (result) 659 goto out; 660 661 result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask, 662 NULL); 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 (len < sizeof(hdr)) 1108 return -EINVAL; 1109 1110 if (copy_from_user(&hdr, buf, sizeof(hdr))) 1111 return -EFAULT; 1112 1113 if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) 1114 return -EINVAL; 1115 1116 if (hdr.in + sizeof(hdr) > len) 1117 return -EINVAL; 1118 1119 result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), 1120 hdr.in, hdr.out); 1121 if (!result) 1122 result = len; 1123 1124 return result; 1125} 1126 1127static unsigned int ib_ucm_poll(struct file *filp, 1128 struct poll_table_struct *wait) 1129{ 1130 struct ib_ucm_file *file = filp->private_data; 1131 unsigned int mask = 0; 1132 1133 poll_wait(filp, &file->poll_wait, wait); 1134 1135 if (!list_empty(&file->events)) 1136 mask = POLLIN | POLLRDNORM; 1137 1138 return mask; 1139} 1140 1141/* 1142 * ib_ucm_open() does not need the BKL: 1143 * 1144 * - no global state is referred to; 1145 * - there is no ioctl method to race against; 1146 * - no further module initialization is required for open to work 1147 * after the device is registered. 1148 */ 1149static int ib_ucm_open(struct inode *inode, struct file *filp) 1150{ 1151 struct ib_ucm_file *file; 1152 1153 file = kmalloc(sizeof(*file), GFP_KERNEL); 1154 if (!file) 1155 return -ENOMEM; 1156 1157 INIT_LIST_HEAD(&file->events); 1158 INIT_LIST_HEAD(&file->ctxs); 1159 init_waitqueue_head(&file->poll_wait); 1160 1161 mutex_init(&file->file_mutex); 1162 1163 filp->private_data = file; 1164 file->filp = filp; 1165 file->device = container_of(inode->i_cdev, struct ib_ucm_device, cdev); 1166 1167 return nonseekable_open(inode, filp); 1168} 1169 1170static int ib_ucm_close(struct inode *inode, struct file *filp) 1171{ 1172 struct ib_ucm_file *file = filp->private_data; 1173 struct ib_ucm_context *ctx; 1174 1175 mutex_lock(&file->file_mutex); 1176 while (!list_empty(&file->ctxs)) { 1177 ctx = list_entry(file->ctxs.next, 1178 struct ib_ucm_context, file_list); 1179 mutex_unlock(&file->file_mutex); 1180 1181 mutex_lock(&ctx_id_mutex); 1182 idr_remove(&ctx_id_table, ctx->id); 1183 mutex_unlock(&ctx_id_mutex); 1184 1185 ib_destroy_cm_id(ctx->cm_id); 1186 ib_ucm_cleanup_events(ctx); 1187 kfree(ctx); 1188 1189 mutex_lock(&file->file_mutex); 1190 } 1191 mutex_unlock(&file->file_mutex); 1192 kfree(file); 1193 return 0; 1194} 1195 1196static void ib_ucm_release_dev(struct device *dev) 1197{ 1198 struct ib_ucm_device *ucm_dev; 1199 1200 ucm_dev = container_of(dev, struct ib_ucm_device, dev); 1201 cdev_del(&ucm_dev->cdev); 1202 if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) 1203 clear_bit(ucm_dev->devnum, dev_map); 1204 else 1205 clear_bit(ucm_dev->devnum - IB_UCM_MAX_DEVICES, dev_map); 1206 kfree(ucm_dev); 1207} 1208 1209static const struct file_operations ucm_fops = { 1210 .owner = THIS_MODULE, 1211 .open = ib_ucm_open, 1212 .release = ib_ucm_close, 1213 .write = ib_ucm_write, 1214 .poll = ib_ucm_poll, 1215 .llseek = no_llseek, 1216}; 1217 1218static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, 1219 char *buf) 1220{ 1221 struct ib_ucm_device *ucm_dev; 1222 1223 ucm_dev = container_of(dev, struct ib_ucm_device, dev); 1224 return sprintf(buf, "%s\n", ucm_dev->ib_dev->name); 1225} 1226static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); 1227 1228static dev_t overflow_maj; 1229static DECLARE_BITMAP(overflow_map, IB_UCM_MAX_DEVICES); 1230static int find_overflow_devnum(void) 1231{ 1232 int ret; 1233 1234 if (!overflow_maj) { 1235 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES, 1236 "infiniband_cm"); 1237 if (ret) { 1238 printk(KERN_ERR "ucm: couldn't register dynamic device number\n"); 1239 return ret; 1240 } 1241 } 1242 1243 ret = find_first_zero_bit(overflow_map, IB_UCM_MAX_DEVICES); 1244 if (ret >= IB_UCM_MAX_DEVICES) 1245 return -1; 1246 1247 return ret; 1248} 1249 1250static void ib_ucm_add_one(struct ib_device *device) 1251{ 1252 int devnum; 1253 dev_t base; 1254 struct ib_ucm_device *ucm_dev; 1255 1256 if (!device->alloc_ucontext || 1257 rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 1258 return; 1259 1260 ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); 1261 if (!ucm_dev) 1262 return; 1263 1264 ucm_dev->ib_dev = device; 1265 1266 devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); 1267 if (devnum >= IB_UCM_MAX_DEVICES) { 1268 devnum = find_overflow_devnum(); 1269 if (devnum < 0) 1270 goto err; 1271 1272 ucm_dev->devnum = devnum + IB_UCM_MAX_DEVICES; 1273 base = devnum + overflow_maj; 1274 set_bit(devnum, overflow_map); 1275 } else { 1276 ucm_dev->devnum = devnum; 1277 base = devnum + IB_UCM_BASE_DEV; 1278 set_bit(devnum, dev_map); 1279 } 1280 1281 cdev_init(&ucm_dev->cdev, &ucm_fops); 1282 ucm_dev->cdev.owner = THIS_MODULE; 1283 kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum); 1284 if (cdev_add(&ucm_dev->cdev, base, 1)) 1285 goto err; 1286 1287 ucm_dev->dev.class = &cm_class; 1288 ucm_dev->dev.parent = device->dma_device; 1289 ucm_dev->dev.devt = ucm_dev->cdev.dev; 1290 ucm_dev->dev.release = ib_ucm_release_dev; 1291 dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum); 1292 if (device_register(&ucm_dev->dev)) 1293 goto err_cdev; 1294 1295 if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev)) 1296 goto err_dev; 1297 1298 ib_set_client_data(device, &ucm_client, ucm_dev); 1299 return; 1300 1301err_dev: 1302 device_unregister(&ucm_dev->dev); 1303err_cdev: 1304 cdev_del(&ucm_dev->cdev); 1305 if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) 1306 clear_bit(devnum, dev_map); 1307 else 1308 clear_bit(devnum, overflow_map); 1309err: 1310 kfree(ucm_dev); 1311 return; 1312} 1313 1314static void ib_ucm_remove_one(struct ib_device *device) 1315{ 1316 struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client); 1317 1318 if (!ucm_dev) 1319 return; 1320 1321 device_unregister(&ucm_dev->dev); 1322} 1323 1324static CLASS_ATTR_STRING(abi_version, S_IRUGO, 1325 __stringify(IB_USER_CM_ABI_VERSION)); 1326 1327static int __init ib_ucm_init(void) 1328{ 1329 int ret; 1330 1331 ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, 1332 "infiniband_cm"); 1333 if (ret) { 1334 printk(KERN_ERR "ucm: couldn't register device number\n"); 1335 goto error1; 1336 } 1337 1338 ret = class_create_file(&cm_class, &class_attr_abi_version.attr); 1339 if (ret) { 1340 printk(KERN_ERR "ucm: couldn't create abi_version attribute\n"); 1341 goto error2; 1342 } 1343 1344 ret = ib_register_client(&ucm_client); 1345 if (ret) { 1346 printk(KERN_ERR "ucm: couldn't register client\n"); 1347 goto error3; 1348 } 1349 return 0; 1350 1351error3: 1352 class_remove_file(&cm_class, &class_attr_abi_version.attr); 1353error2: 1354 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); 1355error1: 1356 return ret; 1357} 1358 1359static void __exit ib_ucm_cleanup(void) 1360{ 1361 ib_unregister_client(&ucm_client); 1362 class_remove_file(&cm_class, &class_attr_abi_version.attr); 1363 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); 1364 if (overflow_maj) 1365 unregister_chrdev_region(overflow_maj, IB_UCM_MAX_DEVICES); 1366 idr_destroy(&ctx_id_table); 1367} 1368 1369module_init(ib_ucm_init); 1370module_exit(ib_ucm_cleanup); 1371