ib_ucm.c revision 331769
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/fs.h> 36#include <linux/module.h> 37#include <linux/device.h> 38#include <linux/err.h> 39#include <linux/poll.h> 40#include <linux/sched.h> 41#include <linux/file.h> 42#include <linux/cdev.h> 43#include <linux/idr.h> 44#include <linux/mutex.h> 45#include <linux/slab.h> 46 47#include <asm/uaccess.h> 48 49#include <rdma/ib.h> 50#include <rdma/ib_cm.h> 51#include <rdma/ib_user_cm.h> 52#include <rdma/ib_marshall.h> 53 54MODULE_AUTHOR("Libor Michalek"); 55MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); 56MODULE_LICENSE("Dual BSD/GPL"); 57 58struct ib_ucm_device { 59 int devnum; 60 struct cdev cdev; 61 struct device dev; 62 struct ib_device *ib_dev; 63}; 64 65struct ib_ucm_file { 66 struct mutex file_mutex; 67 struct file *filp; 68 struct ib_ucm_device *device; 69 70 struct list_head ctxs; 71 struct list_head events; 72 wait_queue_head_t poll_wait; 73}; 74 75struct ib_ucm_context { 76 int id; 77 struct completion comp; 78 atomic_t ref; 79 int events_reported; 80 81 struct ib_ucm_file *file; 82 struct ib_cm_id *cm_id; 83 __u64 uid; 84 85 struct list_head events; /* list of pending events. */ 86 struct list_head file_list; /* member in file ctx list */ 87}; 88 89struct ib_ucm_event { 90 struct ib_ucm_context *ctx; 91 struct list_head file_list; /* member in file event list */ 92 struct list_head ctx_list; /* member in ctx event list */ 93 94 struct ib_cm_id *cm_id; 95 struct ib_ucm_event_resp resp; 96 void *data; 97 void *info; 98 int data_len; 99 int info_len; 100}; 101 102enum { 103 IB_UCM_MAJOR = 231, 104 IB_UCM_BASE_MINOR = 224, 105 IB_UCM_MAX_DEVICES = 32 106}; 107 108#define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) 109 110static void ib_ucm_add_one(struct ib_device *device); 111static void ib_ucm_remove_one(struct ib_device *device, void *client_data); 112 113static struct ib_client ucm_client = { 114 .name = "ucm", 115 .add = ib_ucm_add_one, 116 .remove = ib_ucm_remove_one 117}; 118 119static DEFINE_MUTEX(ctx_id_mutex); 120static DEFINE_IDR(ctx_id_table); 121static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); 122 123static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) 124{ 125 struct ib_ucm_context *ctx; 126 127 mutex_lock(&ctx_id_mutex); 128 ctx = idr_find(&ctx_id_table, id); 129 if (!ctx) 130 ctx = ERR_PTR(-ENOENT); 131 else if (ctx->file != file) 132 ctx = ERR_PTR(-EINVAL); 133 else 134 atomic_inc(&ctx->ref); 135 mutex_unlock(&ctx_id_mutex); 136 137 return ctx; 138} 139 140static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) 141{ 142 if (atomic_dec_and_test(&ctx->ref)) 143 complete(&ctx->comp); 144} 145 146static inline int ib_ucm_new_cm_id(int event) 147{ 148 return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; 149} 150 151static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) 152{ 153 struct ib_ucm_event *uevent; 154 155 mutex_lock(&ctx->file->file_mutex); 156 list_del(&ctx->file_list); 157 while (!list_empty(&ctx->events)) { 158 159 uevent = list_entry(ctx->events.next, 160 struct ib_ucm_event, ctx_list); 161 list_del(&uevent->file_list); 162 list_del(&uevent->ctx_list); 163 mutex_unlock(&ctx->file->file_mutex); 164 165 /* clear incoming connections. */ 166 if (ib_ucm_new_cm_id(uevent->resp.event)) 167 ib_destroy_cm_id(uevent->cm_id); 168 169 kfree(uevent); 170 mutex_lock(&ctx->file->file_mutex); 171 } 172 mutex_unlock(&ctx->file->file_mutex); 173} 174 175static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) 176{ 177 struct ib_ucm_context *ctx; 178 179 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 180 if (!ctx) 181 return NULL; 182 183 atomic_set(&ctx->ref, 1); 184 init_completion(&ctx->comp); 185 ctx->file = file; 186 INIT_LIST_HEAD(&ctx->events); 187 188 mutex_lock(&ctx_id_mutex); 189 ctx->id = idr_alloc(&ctx_id_table, ctx, 0, 0, GFP_KERNEL); 190 mutex_unlock(&ctx_id_mutex); 191 if (ctx->id < 0) 192 goto error; 193 194 list_add_tail(&ctx->file_list, &file->ctxs); 195 return ctx; 196 197error: 198 kfree(ctx); 199 return NULL; 200} 201 202static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, 203 struct ib_cm_req_event_param *kreq) 204{ 205 ureq->remote_ca_guid = kreq->remote_ca_guid; 206 ureq->remote_qkey = kreq->remote_qkey; 207 ureq->remote_qpn = kreq->remote_qpn; 208 ureq->qp_type = kreq->qp_type; 209 ureq->starting_psn = kreq->starting_psn; 210 ureq->responder_resources = kreq->responder_resources; 211 ureq->initiator_depth = kreq->initiator_depth; 212 ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; 213 ureq->flow_control = kreq->flow_control; 214 ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; 215 ureq->retry_count = kreq->retry_count; 216 ureq->rnr_retry_count = kreq->rnr_retry_count; 217 ureq->srq = kreq->srq; 218 ureq->port = kreq->port; 219 220 ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); 221 if (kreq->alternate_path) 222 ib_copy_path_rec_to_user(&ureq->alternate_path, 223 kreq->alternate_path); 224} 225 226static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, 227 struct ib_cm_rep_event_param *krep) 228{ 229 urep->remote_ca_guid = krep->remote_ca_guid; 230 urep->remote_qkey = krep->remote_qkey; 231 urep->remote_qpn = krep->remote_qpn; 232 urep->starting_psn = krep->starting_psn; 233 urep->responder_resources = krep->responder_resources; 234 urep->initiator_depth = krep->initiator_depth; 235 urep->target_ack_delay = krep->target_ack_delay; 236 urep->failover_accepted = krep->failover_accepted; 237 urep->flow_control = krep->flow_control; 238 urep->rnr_retry_count = krep->rnr_retry_count; 239 urep->srq = krep->srq; 240} 241 242static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, 243 struct ib_cm_sidr_rep_event_param *krep) 244{ 245 urep->status = krep->status; 246 urep->qkey = krep->qkey; 247 urep->qpn = krep->qpn; 248}; 249 250static int ib_ucm_event_process(struct ib_cm_event *evt, 251 struct ib_ucm_event *uvt) 252{ 253 void *info = NULL; 254 255 switch (evt->event) { 256 case IB_CM_REQ_RECEIVED: 257 ib_ucm_event_req_get(&uvt->resp.u.req_resp, 258 &evt->param.req_rcvd); 259 uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; 260 uvt->resp.present = IB_UCM_PRES_PRIMARY; 261 uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? 262 IB_UCM_PRES_ALTERNATE : 0); 263 break; 264 case IB_CM_REP_RECEIVED: 265 ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, 266 &evt->param.rep_rcvd); 267 uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 268 break; 269 case IB_CM_RTU_RECEIVED: 270 uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; 271 uvt->resp.u.send_status = evt->param.send_status; 272 break; 273 case IB_CM_DREQ_RECEIVED: 274 uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; 275 uvt->resp.u.send_status = evt->param.send_status; 276 break; 277 case IB_CM_DREP_RECEIVED: 278 uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; 279 uvt->resp.u.send_status = evt->param.send_status; 280 break; 281 case IB_CM_MRA_RECEIVED: 282 uvt->resp.u.mra_resp.timeout = 283 evt->param.mra_rcvd.service_timeout; 284 uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; 285 break; 286 case IB_CM_REJ_RECEIVED: 287 uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; 288 uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 289 uvt->info_len = evt->param.rej_rcvd.ari_length; 290 info = evt->param.rej_rcvd.ari; 291 break; 292 case IB_CM_LAP_RECEIVED: 293 ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, 294 evt->param.lap_rcvd.alternate_path); 295 uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; 296 uvt->resp.present = IB_UCM_PRES_ALTERNATE; 297 break; 298 case IB_CM_APR_RECEIVED: 299 uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; 300 uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; 301 uvt->info_len = evt->param.apr_rcvd.info_len; 302 info = evt->param.apr_rcvd.apr_info; 303 break; 304 case IB_CM_SIDR_REQ_RECEIVED: 305 uvt->resp.u.sidr_req_resp.pkey = 306 evt->param.sidr_req_rcvd.pkey; 307 uvt->resp.u.sidr_req_resp.port = 308 evt->param.sidr_req_rcvd.port; 309 uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; 310 break; 311 case IB_CM_SIDR_REP_RECEIVED: 312 ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, 313 &evt->param.sidr_rep_rcvd); 314 uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 315 uvt->info_len = evt->param.sidr_rep_rcvd.info_len; 316 info = evt->param.sidr_rep_rcvd.info; 317 break; 318 default: 319 uvt->resp.u.send_status = evt->param.send_status; 320 break; 321 } 322 323 if (uvt->data_len) { 324 uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); 325 if (!uvt->data) 326 goto err1; 327 328 uvt->resp.present |= IB_UCM_PRES_DATA; 329 } 330 331 if (uvt->info_len) { 332 uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); 333 if (!uvt->info) 334 goto err2; 335 336 uvt->resp.present |= IB_UCM_PRES_INFO; 337 } 338 return 0; 339 340err2: 341 kfree(uvt->data); 342err1: 343 return -ENOMEM; 344} 345 346static int ib_ucm_event_handler(struct ib_cm_id *cm_id, 347 struct ib_cm_event *event) 348{ 349 struct ib_ucm_event *uevent; 350 struct ib_ucm_context *ctx; 351 int result = 0; 352 353 ctx = cm_id->context; 354 355 uevent = kzalloc(sizeof *uevent, GFP_KERNEL); 356 if (!uevent) 357 goto err1; 358 359 uevent->ctx = ctx; 360 uevent->cm_id = cm_id; 361 uevent->resp.uid = ctx->uid; 362 uevent->resp.id = ctx->id; 363 uevent->resp.event = event->event; 364 365 result = ib_ucm_event_process(event, uevent); 366 if (result) 367 goto err2; 368 369 mutex_lock(&ctx->file->file_mutex); 370 list_add_tail(&uevent->file_list, &ctx->file->events); 371 list_add_tail(&uevent->ctx_list, &ctx->events); 372 wake_up_interruptible(&ctx->file->poll_wait); 373 mutex_unlock(&ctx->file->file_mutex); 374 return 0; 375 376err2: 377 kfree(uevent); 378err1: 379 /* Destroy new cm_id's */ 380 return ib_ucm_new_cm_id(event->event); 381} 382 383static ssize_t ib_ucm_event(struct ib_ucm_file *file, 384 const char __user *inbuf, 385 int in_len, int out_len) 386{ 387 struct ib_ucm_context *ctx; 388 struct ib_ucm_event_get cmd; 389 struct ib_ucm_event *uevent; 390 int result = 0; 391 392 if (out_len < sizeof(struct ib_ucm_event_resp)) 393 return -ENOSPC; 394 395 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 396 return -EFAULT; 397 398 mutex_lock(&file->file_mutex); 399 while (list_empty(&file->events)) { 400 mutex_unlock(&file->file_mutex); 401 402 if (file->filp->f_flags & O_NONBLOCK) 403 return -EAGAIN; 404 405 if (wait_event_interruptible(file->poll_wait, 406 !list_empty(&file->events))) 407 return -ERESTARTSYS; 408 409 mutex_lock(&file->file_mutex); 410 } 411 412 uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); 413 414 if (ib_ucm_new_cm_id(uevent->resp.event)) { 415 ctx = ib_ucm_ctx_alloc(file); 416 if (!ctx) { 417 result = -ENOMEM; 418 goto done; 419 } 420 421 ctx->cm_id = uevent->cm_id; 422 ctx->cm_id->context = ctx; 423 uevent->resp.id = ctx->id; 424 } 425 426 if (copy_to_user((void __user *)(unsigned long)cmd.response, 427 &uevent->resp, sizeof(uevent->resp))) { 428 result = -EFAULT; 429 goto done; 430 } 431 432 if (uevent->data) { 433 if (cmd.data_len < uevent->data_len) { 434 result = -ENOMEM; 435 goto done; 436 } 437 if (copy_to_user((void __user *)(unsigned long)cmd.data, 438 uevent->data, uevent->data_len)) { 439 result = -EFAULT; 440 goto done; 441 } 442 } 443 444 if (uevent->info) { 445 if (cmd.info_len < uevent->info_len) { 446 result = -ENOMEM; 447 goto done; 448 } 449 if (copy_to_user((void __user *)(unsigned long)cmd.info, 450 uevent->info, uevent->info_len)) { 451 result = -EFAULT; 452 goto done; 453 } 454 } 455 456 list_del(&uevent->file_list); 457 list_del(&uevent->ctx_list); 458 uevent->ctx->events_reported++; 459 460 kfree(uevent->data); 461 kfree(uevent->info); 462 kfree(uevent); 463done: 464 mutex_unlock(&file->file_mutex); 465 return result; 466} 467 468static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, 469 const char __user *inbuf, 470 int in_len, int out_len) 471{ 472 struct ib_ucm_create_id cmd; 473 struct ib_ucm_create_id_resp resp; 474 struct ib_ucm_context *ctx; 475 int result; 476 477 if (out_len < sizeof(resp)) 478 return -ENOSPC; 479 480 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 481 return -EFAULT; 482 483 mutex_lock(&file->file_mutex); 484 ctx = ib_ucm_ctx_alloc(file); 485 mutex_unlock(&file->file_mutex); 486 if (!ctx) 487 return -ENOMEM; 488 489 ctx->uid = cmd.uid; 490 ctx->cm_id = ib_create_cm_id(file->device->ib_dev, 491 ib_ucm_event_handler, ctx); 492 if (IS_ERR(ctx->cm_id)) { 493 result = PTR_ERR(ctx->cm_id); 494 goto err1; 495 } 496 497 resp.id = ctx->id; 498 if (copy_to_user((void __user *)(unsigned long)cmd.response, 499 &resp, sizeof(resp))) { 500 result = -EFAULT; 501 goto err2; 502 } 503 return 0; 504 505err2: 506 ib_destroy_cm_id(ctx->cm_id); 507err1: 508 mutex_lock(&ctx_id_mutex); 509 idr_remove(&ctx_id_table, ctx->id); 510 mutex_unlock(&ctx_id_mutex); 511 kfree(ctx); 512 return result; 513} 514 515static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, 516 const char __user *inbuf, 517 int in_len, int out_len) 518{ 519 struct ib_ucm_destroy_id cmd; 520 struct ib_ucm_destroy_id_resp resp; 521 struct ib_ucm_context *ctx; 522 int result = 0; 523 524 if (out_len < sizeof(resp)) 525 return -ENOSPC; 526 527 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 528 return -EFAULT; 529 530 mutex_lock(&ctx_id_mutex); 531 ctx = idr_find(&ctx_id_table, cmd.id); 532 if (!ctx) 533 ctx = ERR_PTR(-ENOENT); 534 else if (ctx->file != file) 535 ctx = ERR_PTR(-EINVAL); 536 else 537 idr_remove(&ctx_id_table, ctx->id); 538 mutex_unlock(&ctx_id_mutex); 539 540 if (IS_ERR(ctx)) 541 return PTR_ERR(ctx); 542 543 ib_ucm_ctx_put(ctx); 544 wait_for_completion(&ctx->comp); 545 546 /* No new events will be generated after destroying the cm_id. */ 547 ib_destroy_cm_id(ctx->cm_id); 548 /* Cleanup events not yet reported to the user. */ 549 ib_ucm_cleanup_events(ctx); 550 551 resp.events_reported = ctx->events_reported; 552 if (copy_to_user((void __user *)(unsigned long)cmd.response, 553 &resp, sizeof(resp))) 554 result = -EFAULT; 555 556 kfree(ctx); 557 return result; 558} 559 560static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, 561 const char __user *inbuf, 562 int in_len, int out_len) 563{ 564 struct ib_ucm_attr_id_resp resp; 565 struct ib_ucm_attr_id cmd; 566 struct ib_ucm_context *ctx; 567 int result = 0; 568 569 if (out_len < sizeof(resp)) 570 return -ENOSPC; 571 572 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 573 return -EFAULT; 574 575 ctx = ib_ucm_ctx_get(file, cmd.id); 576 if (IS_ERR(ctx)) 577 return PTR_ERR(ctx); 578 579 resp.service_id = ctx->cm_id->service_id; 580 resp.service_mask = ctx->cm_id->service_mask; 581 resp.local_id = ctx->cm_id->local_id; 582 resp.remote_id = ctx->cm_id->remote_id; 583 584 if (copy_to_user((void __user *)(unsigned long)cmd.response, 585 &resp, sizeof(resp))) 586 result = -EFAULT; 587 588 ib_ucm_ctx_put(ctx); 589 return result; 590} 591 592static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, 593 const char __user *inbuf, 594 int in_len, int out_len) 595{ 596 struct ib_uverbs_qp_attr resp; 597 struct ib_ucm_init_qp_attr cmd; 598 struct ib_ucm_context *ctx; 599 struct ib_qp_attr qp_attr; 600 int result = 0; 601 602 if (out_len < sizeof(resp)) 603 return -ENOSPC; 604 605 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 606 return -EFAULT; 607 608 ctx = ib_ucm_ctx_get(file, cmd.id); 609 if (IS_ERR(ctx)) 610 return PTR_ERR(ctx); 611 612 resp.qp_attr_mask = 0; 613 memset(&qp_attr, 0, sizeof qp_attr); 614 qp_attr.qp_state = cmd.qp_state; 615 result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); 616 if (result) 617 goto out; 618 619 ib_copy_qp_attr_to_user(&resp, &qp_attr); 620 621 if (copy_to_user((void __user *)(unsigned long)cmd.response, 622 &resp, sizeof(resp))) 623 result = -EFAULT; 624 625out: 626 ib_ucm_ctx_put(ctx); 627 return result; 628} 629 630static int ucm_validate_listen(__be64 service_id, __be64 service_mask) 631{ 632 service_id &= service_mask; 633 634 if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) || 635 ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID)) 636 return -EINVAL; 637 638 return 0; 639} 640 641static ssize_t ib_ucm_listen(struct ib_ucm_file *file, 642 const char __user *inbuf, 643 int in_len, int out_len) 644{ 645 struct ib_ucm_listen cmd; 646 struct ib_ucm_context *ctx; 647 int result; 648 649 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 650 return -EFAULT; 651 652 ctx = ib_ucm_ctx_get(file, cmd.id); 653 if (IS_ERR(ctx)) 654 return PTR_ERR(ctx); 655 656 result = ucm_validate_listen(cmd.service_id, cmd.service_mask); 657 if (result) 658 goto out; 659 660 result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); 661out: 662 ib_ucm_ctx_put(ctx); 663 return result; 664} 665 666static ssize_t ib_ucm_notify(struct ib_ucm_file *file, 667 const char __user *inbuf, 668 int in_len, int out_len) 669{ 670 struct ib_ucm_notify cmd; 671 struct ib_ucm_context *ctx; 672 int result; 673 674 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 675 return -EFAULT; 676 677 ctx = ib_ucm_ctx_get(file, cmd.id); 678 if (IS_ERR(ctx)) 679 return PTR_ERR(ctx); 680 681 result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event); 682 ib_ucm_ctx_put(ctx); 683 return result; 684} 685 686static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) 687{ 688 void *data; 689 690 *dest = NULL; 691 692 if (!len) 693 return 0; 694 695 data = memdup_user((void __user *)(unsigned long)src, len); 696 if (IS_ERR(data)) 697 return PTR_ERR(data); 698 699 *dest = data; 700 return 0; 701} 702 703static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) 704{ 705 struct ib_user_path_rec upath; 706 struct ib_sa_path_rec *sa_path; 707 708 *path = NULL; 709 710 if (!src) 711 return 0; 712 713 sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); 714 if (!sa_path) 715 return -ENOMEM; 716 717 if (copy_from_user(&upath, (void __user *)(unsigned long)src, 718 sizeof(upath))) { 719 720 kfree(sa_path); 721 return -EFAULT; 722 } 723 724 ib_copy_path_rec_from_user(sa_path, &upath); 725 *path = sa_path; 726 return 0; 727} 728 729static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, 730 const char __user *inbuf, 731 int in_len, int out_len) 732{ 733 struct ib_cm_req_param param; 734 struct ib_ucm_context *ctx; 735 struct ib_ucm_req cmd; 736 int result; 737 738 param.private_data = NULL; 739 param.primary_path = NULL; 740 param.alternate_path = NULL; 741 742 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 743 return -EFAULT; 744 745 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); 746 if (result) 747 goto done; 748 749 result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); 750 if (result) 751 goto done; 752 753 result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); 754 if (result) 755 goto done; 756 757 param.private_data_len = cmd.len; 758 param.service_id = cmd.sid; 759 param.qp_num = cmd.qpn; 760 param.qp_type = cmd.qp_type; 761 param.starting_psn = cmd.psn; 762 param.peer_to_peer = cmd.peer_to_peer; 763 param.responder_resources = cmd.responder_resources; 764 param.initiator_depth = cmd.initiator_depth; 765 param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; 766 param.flow_control = cmd.flow_control; 767 param.local_cm_response_timeout = cmd.local_cm_response_timeout; 768 param.retry_count = cmd.retry_count; 769 param.rnr_retry_count = cmd.rnr_retry_count; 770 param.max_cm_retries = cmd.max_cm_retries; 771 param.srq = cmd.srq; 772 773 ctx = ib_ucm_ctx_get(file, cmd.id); 774 if (!IS_ERR(ctx)) { 775 result = ib_send_cm_req(ctx->cm_id, ¶m); 776 ib_ucm_ctx_put(ctx); 777 } else 778 result = PTR_ERR(ctx); 779 780done: 781 kfree(param.private_data); 782 kfree(param.primary_path); 783 kfree(param.alternate_path); 784 return result; 785} 786 787static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, 788 const char __user *inbuf, 789 int in_len, int out_len) 790{ 791 struct ib_cm_rep_param param; 792 struct ib_ucm_context *ctx; 793 struct ib_ucm_rep cmd; 794 int result; 795 796 param.private_data = NULL; 797 798 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 799 return -EFAULT; 800 801 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); 802 if (result) 803 return result; 804 805 param.qp_num = cmd.qpn; 806 param.starting_psn = cmd.psn; 807 param.private_data_len = cmd.len; 808 param.responder_resources = cmd.responder_resources; 809 param.initiator_depth = cmd.initiator_depth; 810 param.failover_accepted = cmd.failover_accepted; 811 param.flow_control = cmd.flow_control; 812 param.rnr_retry_count = cmd.rnr_retry_count; 813 param.srq = cmd.srq; 814 815 ctx = ib_ucm_ctx_get(file, cmd.id); 816 if (!IS_ERR(ctx)) { 817 ctx->uid = cmd.uid; 818 result = ib_send_cm_rep(ctx->cm_id, ¶m); 819 ib_ucm_ctx_put(ctx); 820 } else 821 result = PTR_ERR(ctx); 822 823 kfree(param.private_data); 824 return result; 825} 826 827static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, 828 const char __user *inbuf, int in_len, 829 int (*func)(struct ib_cm_id *cm_id, 830 const void *private_data, 831 u8 private_data_len)) 832{ 833 struct ib_ucm_private_data cmd; 834 struct ib_ucm_context *ctx; 835 const void *private_data = NULL; 836 int result; 837 838 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 839 return -EFAULT; 840 841 result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); 842 if (result) 843 return result; 844 845 ctx = ib_ucm_ctx_get(file, cmd.id); 846 if (!IS_ERR(ctx)) { 847 result = func(ctx->cm_id, private_data, cmd.len); 848 ib_ucm_ctx_put(ctx); 849 } else 850 result = PTR_ERR(ctx); 851 852 kfree(private_data); 853 return result; 854} 855 856static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, 857 const char __user *inbuf, 858 int in_len, int out_len) 859{ 860 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); 861} 862 863static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, 864 const char __user *inbuf, 865 int in_len, int out_len) 866{ 867 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); 868} 869 870static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, 871 const char __user *inbuf, 872 int in_len, int out_len) 873{ 874 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); 875} 876 877static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, 878 const char __user *inbuf, int in_len, 879 int (*func)(struct ib_cm_id *cm_id, 880 int status, 881 const void *info, 882 u8 info_len, 883 const void *data, 884 u8 data_len)) 885{ 886 struct ib_ucm_context *ctx; 887 struct ib_ucm_info cmd; 888 const void *data = NULL; 889 const void *info = NULL; 890 int result; 891 892 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 893 return -EFAULT; 894 895 result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); 896 if (result) 897 goto done; 898 899 result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); 900 if (result) 901 goto done; 902 903 ctx = ib_ucm_ctx_get(file, cmd.id); 904 if (!IS_ERR(ctx)) { 905 result = func(ctx->cm_id, cmd.status, info, cmd.info_len, 906 data, cmd.data_len); 907 ib_ucm_ctx_put(ctx); 908 } else 909 result = PTR_ERR(ctx); 910 911done: 912 kfree(data); 913 kfree(info); 914 return result; 915} 916 917static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, 918 const char __user *inbuf, 919 int in_len, int out_len) 920{ 921 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); 922} 923 924static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, 925 const char __user *inbuf, 926 int in_len, int out_len) 927{ 928 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); 929} 930 931static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, 932 const char __user *inbuf, 933 int in_len, int out_len) 934{ 935 struct ib_ucm_context *ctx; 936 struct ib_ucm_mra cmd; 937 const void *data = NULL; 938 int result; 939 940 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 941 return -EFAULT; 942 943 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); 944 if (result) 945 return result; 946 947 ctx = ib_ucm_ctx_get(file, cmd.id); 948 if (!IS_ERR(ctx)) { 949 result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); 950 ib_ucm_ctx_put(ctx); 951 } else 952 result = PTR_ERR(ctx); 953 954 kfree(data); 955 return result; 956} 957 958static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, 959 const char __user *inbuf, 960 int in_len, int out_len) 961{ 962 struct ib_ucm_context *ctx; 963 struct ib_sa_path_rec *path = NULL; 964 struct ib_ucm_lap cmd; 965 const void *data = NULL; 966 int result; 967 968 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 969 return -EFAULT; 970 971 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); 972 if (result) 973 goto done; 974 975 result = ib_ucm_path_get(&path, cmd.path); 976 if (result) 977 goto done; 978 979 ctx = ib_ucm_ctx_get(file, cmd.id); 980 if (!IS_ERR(ctx)) { 981 result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); 982 ib_ucm_ctx_put(ctx); 983 } else 984 result = PTR_ERR(ctx); 985 986done: 987 kfree(data); 988 kfree(path); 989 return result; 990} 991 992static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, 993 const char __user *inbuf, 994 int in_len, int out_len) 995{ 996 struct ib_cm_sidr_req_param param; 997 struct ib_ucm_context *ctx; 998 struct ib_ucm_sidr_req cmd; 999 int result; 1000 1001 param.private_data = NULL; 1002 param.path = NULL; 1003 1004 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 1005 return -EFAULT; 1006 1007 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); 1008 if (result) 1009 goto done; 1010 1011 result = ib_ucm_path_get(¶m.path, cmd.path); 1012 if (result) 1013 goto done; 1014 1015 param.private_data_len = cmd.len; 1016 param.service_id = cmd.sid; 1017 param.timeout_ms = cmd.timeout; 1018 param.max_cm_retries = cmd.max_cm_retries; 1019 1020 ctx = ib_ucm_ctx_get(file, cmd.id); 1021 if (!IS_ERR(ctx)) { 1022 result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); 1023 ib_ucm_ctx_put(ctx); 1024 } else 1025 result = PTR_ERR(ctx); 1026 1027done: 1028 kfree(param.private_data); 1029 kfree(param.path); 1030 return result; 1031} 1032 1033static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, 1034 const char __user *inbuf, 1035 int in_len, int out_len) 1036{ 1037 struct ib_cm_sidr_rep_param param; 1038 struct ib_ucm_sidr_rep cmd; 1039 struct ib_ucm_context *ctx; 1040 int result; 1041 1042 param.info = NULL; 1043 1044 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 1045 return -EFAULT; 1046 1047 result = ib_ucm_alloc_data(¶m.private_data, 1048 cmd.data, cmd.data_len); 1049 if (result) 1050 goto done; 1051 1052 result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); 1053 if (result) 1054 goto done; 1055 1056 param.qp_num = cmd.qpn; 1057 param.qkey = cmd.qkey; 1058 param.status = cmd.status; 1059 param.info_length = cmd.info_len; 1060 param.private_data_len = cmd.data_len; 1061 1062 ctx = ib_ucm_ctx_get(file, cmd.id); 1063 if (!IS_ERR(ctx)) { 1064 result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); 1065 ib_ucm_ctx_put(ctx); 1066 } else 1067 result = PTR_ERR(ctx); 1068 1069done: 1070 kfree(param.private_data); 1071 kfree(param.info); 1072 return result; 1073} 1074 1075static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, 1076 const char __user *inbuf, 1077 int in_len, int out_len) = { 1078 [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, 1079 [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, 1080 [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, 1081 [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, 1082 [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify, 1083 [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, 1084 [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, 1085 [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, 1086 [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, 1087 [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, 1088 [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, 1089 [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, 1090 [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, 1091 [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, 1092 [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, 1093 [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, 1094 [IB_USER_CM_CMD_EVENT] = ib_ucm_event, 1095 [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, 1096}; 1097 1098static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, 1099 size_t len, loff_t *pos) 1100{ 1101 struct ib_ucm_file *file = filp->private_data; 1102 struct ib_ucm_cmd_hdr hdr; 1103 ssize_t result; 1104 1105 if (WARN_ON_ONCE(!ib_safe_file_access(filp))) 1106 return -EACCES; 1107 1108 if (len < sizeof(hdr)) 1109 return -EINVAL; 1110 1111 if (copy_from_user(&hdr, buf, sizeof(hdr))) 1112 return -EFAULT; 1113 1114 if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) 1115 return -EINVAL; 1116 1117 if (hdr.in + sizeof(hdr) > len) 1118 return -EINVAL; 1119 1120 result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), 1121 hdr.in, hdr.out); 1122 if (!result) 1123 result = len; 1124 1125 return result; 1126} 1127 1128static unsigned int ib_ucm_poll(struct file *filp, 1129 struct poll_table_struct *wait) 1130{ 1131 struct ib_ucm_file *file = filp->private_data; 1132 unsigned int mask = 0; 1133 1134 poll_wait(filp, &file->poll_wait, wait); 1135 1136 if (!list_empty(&file->events)) 1137 mask = POLLIN | POLLRDNORM; 1138 1139 return mask; 1140} 1141 1142/* 1143 * ib_ucm_open() does not need the BKL: 1144 * 1145 * - no global state is referred to; 1146 * - there is no ioctl method to race against; 1147 * - no further module initialization is required for open to work 1148 * after the device is registered. 1149 */ 1150static int ib_ucm_open(struct inode *inode, struct file *filp) 1151{ 1152 struct ib_ucm_file *file; 1153 1154 file = kmalloc(sizeof(*file), GFP_KERNEL); 1155 if (!file) 1156 return -ENOMEM; 1157 1158 INIT_LIST_HEAD(&file->events); 1159 INIT_LIST_HEAD(&file->ctxs); 1160 init_waitqueue_head(&file->poll_wait); 1161 1162 mutex_init(&file->file_mutex); 1163 1164 filp->private_data = file; 1165 file->filp = filp; 1166 file->device = container_of(inode->i_cdev->si_drv1, struct ib_ucm_device, cdev); 1167 1168 return nonseekable_open(inode, filp); 1169} 1170 1171static int ib_ucm_close(struct inode *inode, struct file *filp) 1172{ 1173 struct ib_ucm_file *file = filp->private_data; 1174 struct ib_ucm_context *ctx; 1175 1176 mutex_lock(&file->file_mutex); 1177 while (!list_empty(&file->ctxs)) { 1178 ctx = list_entry(file->ctxs.next, 1179 struct ib_ucm_context, file_list); 1180 mutex_unlock(&file->file_mutex); 1181 1182 mutex_lock(&ctx_id_mutex); 1183 idr_remove(&ctx_id_table, ctx->id); 1184 mutex_unlock(&ctx_id_mutex); 1185 1186 ib_destroy_cm_id(ctx->cm_id); 1187 ib_ucm_cleanup_events(ctx); 1188 kfree(ctx); 1189 1190 mutex_lock(&file->file_mutex); 1191 } 1192 mutex_unlock(&file->file_mutex); 1193 kfree(file); 1194 return 0; 1195} 1196 1197static DECLARE_BITMAP(overflow_map, IB_UCM_MAX_DEVICES); 1198static void ib_ucm_release_dev(struct device *dev) 1199{ 1200 struct ib_ucm_device *ucm_dev; 1201 1202 ucm_dev = container_of(dev, struct ib_ucm_device, dev); 1203 cdev_del(&ucm_dev->cdev); 1204 if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) 1205 clear_bit(ucm_dev->devnum, dev_map); 1206 else 1207 clear_bit(ucm_dev->devnum - IB_UCM_MAX_DEVICES, overflow_map); 1208 kfree(ucm_dev); 1209} 1210 1211static const struct file_operations ucm_fops = { 1212 .owner = THIS_MODULE, 1213 .open = ib_ucm_open, 1214 .release = ib_ucm_close, 1215 .write = ib_ucm_write, 1216 .poll = ib_ucm_poll, 1217 .llseek = no_llseek, 1218}; 1219 1220static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, 1221 char *buf) 1222{ 1223 struct ib_ucm_device *ucm_dev; 1224 1225 ucm_dev = container_of(dev, struct ib_ucm_device, dev); 1226 return sprintf(buf, "%s\n", ucm_dev->ib_dev->name); 1227} 1228static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); 1229 1230static dev_t overflow_maj; 1231static int find_overflow_devnum(void) 1232{ 1233 int ret; 1234 1235 if (!overflow_maj) { 1236 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES, 1237 "infiniband_cm"); 1238 if (ret) { 1239 pr_err("ucm: couldn't register dynamic device number\n"); 1240 return ret; 1241 } 1242 } 1243 1244 ret = find_first_zero_bit(overflow_map, IB_UCM_MAX_DEVICES); 1245 if (ret >= IB_UCM_MAX_DEVICES) 1246 return -1; 1247 1248 return ret; 1249} 1250 1251static void ib_ucm_add_one(struct ib_device *device) 1252{ 1253 int devnum; 1254 dev_t base; 1255 struct ib_ucm_device *ucm_dev; 1256 1257 if (!device->alloc_ucontext || !rdma_cap_ib_cm(device, 1)) 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, void *client_data) 1315{ 1316 struct ib_ucm_device *ucm_dev = client_data; 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 pr_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 pr_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 pr_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_order(ib_ucm_init, SI_ORDER_THIRD); 1370module_exit(ib_ucm_cleanup); 1371