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sys/ofed/drivers/infiniband/core/ib_ucm.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2005 Topspin Communications. All rights reserved. 5 * Copyright (c) 2005 Intel Corporation. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <linux/completion.h> 40 #include <linux/fs.h> 41 #include <linux/module.h> 42 #include <linux/device.h> 43 #include <linux/err.h> 44 #include <linux/poll.h> 45 #include <linux/sched.h> 46 #include <linux/file.h> 47 #include <linux/cdev.h> 48 #include <linux/idr.h> 49 #include <linux/mutex.h> 50 #include <linux/slab.h> 51 52 #include <asm/uaccess.h> 53 54 #include <rdma/ib.h> 55 #include <rdma/ib_cm.h> 56 #include <rdma/ib_user_cm.h> 57 #include <rdma/ib_marshall.h> 58 59 MODULE_AUTHOR("Libor Michalek"); 60 MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); 61 MODULE_LICENSE("Dual BSD/GPL"); 62 63 struct ib_ucm_device { 64 int devnum; 65 struct cdev cdev; 66 struct device dev; 67 struct ib_device *ib_dev; 68 }; 69 70 struct ib_ucm_file { 71 struct mutex file_mutex; 72 struct file *filp; 73 struct ib_ucm_device *device; 74 75 struct list_head ctxs; 76 struct list_head events; 77 wait_queue_head_t poll_wait; 78 }; 79 80 struct ib_ucm_context { 81 int id; 82 struct completion comp; 83 atomic_t ref; 84 int events_reported; 85 86 struct ib_ucm_file *file; 87 struct ib_cm_id *cm_id; 88 __u64 uid; 89 90 struct list_head events; /* list of pending events. */ 91 struct list_head file_list; /* member in file ctx list */ 92 }; 93 94 struct ib_ucm_event { 95 struct ib_ucm_context *ctx; 96 struct list_head file_list; /* member in file event list */ 97 struct list_head ctx_list; /* member in ctx event list */ 98 99 struct ib_cm_id *cm_id; 100 struct ib_ucm_event_resp resp; 101 void *data; 102 void *info; 103 int data_len; 104 int info_len; 105 }; 106 107 enum { 108 IB_UCM_MAJOR = 231, 109 IB_UCM_BASE_MINOR = 224, 110 IB_UCM_MAX_DEVICES = 32 111 }; 112 113 #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) 114 115 static void ib_ucm_add_one(struct ib_device *device); 116 static void ib_ucm_remove_one(struct ib_device *device, void *client_data); 117 118 static struct ib_client ucm_client = { 119 .name = "ucm", 120 .add = ib_ucm_add_one, 121 .remove = ib_ucm_remove_one 122 }; 123 124 static DEFINE_MUTEX(ctx_id_mutex); 125 static DEFINE_IDR(ctx_id_table); 126 static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); 127 128 static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) 129 { 130 struct ib_ucm_context *ctx; 131 132 mutex_lock(&ctx_id_mutex); 133 ctx = idr_find(&ctx_id_table, id); 134 if (!ctx) 135 ctx = ERR_PTR(-ENOENT); 136 else if (ctx->file != file) 137 ctx = ERR_PTR(-EINVAL); 138 else 139 atomic_inc(&ctx->ref); 140 mutex_unlock(&ctx_id_mutex); 141 142 return ctx; 143 } 144 145 static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) 146 { 147 if (atomic_dec_and_test(&ctx->ref)) 148 complete(&ctx->comp); 149 } 150 151 static inline int ib_ucm_new_cm_id(int event) 152 { 153 return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; 154 } 155 156 static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) 157 { 158 struct ib_ucm_event *uevent; 159 160 mutex_lock(&ctx->file->file_mutex); 161 list_del(&ctx->file_list); 162 while (!list_empty(&ctx->events)) { 163 164 uevent = list_entry(ctx->events.next, 165 struct ib_ucm_event, ctx_list); 166 list_del(&uevent->file_list); 167 list_del(&uevent->ctx_list); 168 mutex_unlock(&ctx->file->file_mutex); 169 170 /* clear incoming connections. */ 171 if (ib_ucm_new_cm_id(uevent->resp.event)) 172 ib_destroy_cm_id(uevent->cm_id); 173 174 kfree(uevent); 175 mutex_lock(&ctx->file->file_mutex); 176 } 177 mutex_unlock(&ctx->file->file_mutex); 178 } 179 180 static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) 181 { 182 struct ib_ucm_context *ctx; 183 184 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 185 if (!ctx) 186 return NULL; 187 188 atomic_set(&ctx->ref, 1); 189 init_completion(&ctx->comp); 190 ctx->file = file; 191 INIT_LIST_HEAD(&ctx->events); 192 193 mutex_lock(&ctx_id_mutex); 194 ctx->id = idr_alloc(&ctx_id_table, ctx, 0, 0, GFP_KERNEL); 195 mutex_unlock(&ctx_id_mutex); 196 if (ctx->id < 0) 197 goto error; 198 199 list_add_tail(&ctx->file_list, &file->ctxs); 200 return ctx; 201 202 error: 203 kfree(ctx); 204 return NULL; 205 } 206 207 static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, 208 struct ib_cm_req_event_param *kreq) 209 { 210 ureq->remote_ca_guid = kreq->remote_ca_guid; 211 ureq->remote_qkey = kreq->remote_qkey; 212 ureq->remote_qpn = kreq->remote_qpn; 213 ureq->qp_type = kreq->qp_type; 214 ureq->starting_psn = kreq->starting_psn; 215 ureq->responder_resources = kreq->responder_resources; 216 ureq->initiator_depth = kreq->initiator_depth; 217 ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; 218 ureq->flow_control = kreq->flow_control; 219 ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; 220 ureq->retry_count = kreq->retry_count; 221 ureq->rnr_retry_count = kreq->rnr_retry_count; 222 ureq->srq = kreq->srq; 223 ureq->port = kreq->port; 224 225 ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); 226 if (kreq->alternate_path) 227 ib_copy_path_rec_to_user(&ureq->alternate_path, 228 kreq->alternate_path); 229 } 230 231 static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, 232 struct ib_cm_rep_event_param *krep) 233 { 234 urep->remote_ca_guid = krep->remote_ca_guid; 235 urep->remote_qkey = krep->remote_qkey; 236 urep->remote_qpn = krep->remote_qpn; 237 urep->starting_psn = krep->starting_psn; 238 urep->responder_resources = krep->responder_resources; 239 urep->initiator_depth = krep->initiator_depth; 240 urep->target_ack_delay = krep->target_ack_delay; 241 urep->failover_accepted = krep->failover_accepted; 242 urep->flow_control = krep->flow_control; 243 urep->rnr_retry_count = krep->rnr_retry_count; 244 urep->srq = krep->srq; 245 } 246 247 static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, 248 struct ib_cm_sidr_rep_event_param *krep) 249 { 250 urep->status = krep->status; 251 urep->qkey = krep->qkey; 252 urep->qpn = krep->qpn; 253 }; 254 255 static int ib_ucm_event_process(struct ib_cm_event *evt, 256 struct ib_ucm_event *uvt) 257 { 258 void *info = NULL; 259 260 switch (evt->event) { 261 case IB_CM_REQ_RECEIVED: 262 ib_ucm_event_req_get(&uvt->resp.u.req_resp, 263 &evt->param.req_rcvd); 264 uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; 265 uvt->resp.present = IB_UCM_PRES_PRIMARY; 266 uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? 267 IB_UCM_PRES_ALTERNATE : 0); 268 break; 269 case IB_CM_REP_RECEIVED: 270 ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, 271 &evt->param.rep_rcvd); 272 uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 273 break; 274 case IB_CM_RTU_RECEIVED: 275 uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; 276 uvt->resp.u.send_status = evt->param.send_status; 277 break; 278 case IB_CM_DREQ_RECEIVED: 279 uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; 280 uvt->resp.u.send_status = evt->param.send_status; 281 break; 282 case IB_CM_DREP_RECEIVED: 283 uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; 284 uvt->resp.u.send_status = evt->param.send_status; 285 break; 286 case IB_CM_MRA_RECEIVED: 287 uvt->resp.u.mra_resp.timeout = 288 evt->param.mra_rcvd.service_timeout; 289 uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; 290 break; 291 case IB_CM_REJ_RECEIVED: 292 uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; 293 uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 294 uvt->info_len = evt->param.rej_rcvd.ari_length; 295 info = evt->param.rej_rcvd.ari; 296 break; 297 case IB_CM_LAP_RECEIVED: 298 ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, 299 evt->param.lap_rcvd.alternate_path); 300 uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; 301 uvt->resp.present = IB_UCM_PRES_ALTERNATE; 302 break; 303 case IB_CM_APR_RECEIVED: 304 uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; 305 uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; 306 uvt->info_len = evt->param.apr_rcvd.info_len; 307 info = evt->param.apr_rcvd.apr_info; 308 break; 309 case IB_CM_SIDR_REQ_RECEIVED: 310 uvt->resp.u.sidr_req_resp.pkey = 311 evt->param.sidr_req_rcvd.pkey; 312 uvt->resp.u.sidr_req_resp.port = 313 evt->param.sidr_req_rcvd.port; 314 uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; 315 break; 316 case IB_CM_SIDR_REP_RECEIVED: 317 ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, 318 &evt->param.sidr_rep_rcvd); 319 uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 320 uvt->info_len = evt->param.sidr_rep_rcvd.info_len; 321 info = evt->param.sidr_rep_rcvd.info; 322 break; 323 default: 324 uvt->resp.u.send_status = evt->param.send_status; 325 break; 326 } 327 328 if (uvt->data_len) { 329 uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); 330 if (!uvt->data) 331 goto err1; 332 333 uvt->resp.present |= IB_UCM_PRES_DATA; 334 } 335 336 if (uvt->info_len) { 337 uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); 338 if (!uvt->info) 339 goto err2; 340 341 uvt->resp.present |= IB_UCM_PRES_INFO; 342 } 343 return 0; 344 345 err2: 346 kfree(uvt->data); 347 err1: 348 return -ENOMEM; 349 } 350 351 static int ib_ucm_event_handler(struct ib_cm_id *cm_id, 352 struct ib_cm_event *event) 353 { 354 struct ib_ucm_event *uevent; 355 struct ib_ucm_context *ctx; 356 int result = 0; 357 358 ctx = cm_id->context; 359 360 uevent = kzalloc(sizeof *uevent, GFP_KERNEL); 361 if (!uevent) 362 goto err1; 363 364 uevent->ctx = ctx; 365 uevent->cm_id = cm_id; 366 uevent->resp.uid = ctx->uid; 367 uevent->resp.id = ctx->id; 368 uevent->resp.event = event->event; 369 370 result = ib_ucm_event_process(event, uevent); 371 if (result) 372 goto err2; 373 374 mutex_lock(&ctx->file->file_mutex); 375 list_add_tail(&uevent->file_list, &ctx->file->events); 376 list_add_tail(&uevent->ctx_list, &ctx->events); 377 wake_up_interruptible(&ctx->file->poll_wait); 378 mutex_unlock(&ctx->file->file_mutex); 379 return 0; 380 381 err2: 382 kfree(uevent); 383 err1: 384 /* Destroy new cm_id's */ 385 return ib_ucm_new_cm_id(event->event); 386 } 387 388 static ssize_t ib_ucm_event(struct ib_ucm_file *file, 389 const char __user *inbuf, 390 int in_len, int out_len) 391 { 392 struct ib_ucm_context *ctx; 393 struct ib_ucm_event_get cmd; 394 struct ib_ucm_event *uevent; 395 int result = 0; 396 397 if (out_len < sizeof(struct ib_ucm_event_resp)) 398 return -ENOSPC; 399 400 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 401 return -EFAULT; 402 403 mutex_lock(&file->file_mutex); 404 while (list_empty(&file->events)) { 405 mutex_unlock(&file->file_mutex); 406 407 if (file->filp->f_flags & O_NONBLOCK) 408 return -EAGAIN; 409 410 if (wait_event_interruptible(file->poll_wait, 411 !list_empty(&file->events))) 412 return -ERESTARTSYS; 413 414 mutex_lock(&file->file_mutex); 415 } 416 417 uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); 418 419 if (ib_ucm_new_cm_id(uevent->resp.event)) { 420 ctx = ib_ucm_ctx_alloc(file); 421 if (!ctx) { 422 result = -ENOMEM; 423 goto done; 424 } 425 426 ctx->cm_id = uevent->cm_id; 427 ctx->cm_id->context = ctx; 428 uevent->resp.id = ctx->id; 429 } 430 431 if (copy_to_user((void __user *)(unsigned long)cmd.response, 432 &uevent->resp, sizeof(uevent->resp))) { 433 result = -EFAULT; 434 goto done; 435 } 436 437 if (uevent->data) { 438 if (cmd.data_len < uevent->data_len) { 439 result = -ENOMEM; 440 goto done; 441 } 442 if (copy_to_user((void __user *)(unsigned long)cmd.data, 443 uevent->data, uevent->data_len)) { 444 result = -EFAULT; 445 goto done; 446 } 447 } 448 449 if (uevent->info) { 450 if (cmd.info_len < uevent->info_len) { 451 result = -ENOMEM; 452 goto done; 453 } 454 if (copy_to_user((void __user *)(unsigned long)cmd.info, 455 uevent->info, uevent->info_len)) { 456 result = -EFAULT; 457 goto done; 458 } 459 } 460 461 list_del(&uevent->file_list); 462 list_del(&uevent->ctx_list); 463 uevent->ctx->events_reported++; 464 465 kfree(uevent->data); 466 kfree(uevent->info); 467 kfree(uevent); 468 done: 469 mutex_unlock(&file->file_mutex); 470 return result; 471 } 472 473 static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, 474 const char __user *inbuf, 475 int in_len, int out_len) 476 { 477 struct ib_ucm_create_id cmd; 478 struct ib_ucm_create_id_resp resp; 479 struct ib_ucm_context *ctx; 480 int result; 481 482 if (out_len < sizeof(resp)) 483 return -ENOSPC; 484 485 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 486 return -EFAULT; 487 488 mutex_lock(&file->file_mutex); 489 ctx = ib_ucm_ctx_alloc(file); 490 mutex_unlock(&file->file_mutex); 491 if (!ctx) 492 return -ENOMEM; 493 494 ctx->uid = cmd.uid; 495 ctx->cm_id = ib_create_cm_id(file->device->ib_dev, 496 ib_ucm_event_handler, ctx); 497 if (IS_ERR(ctx->cm_id)) { 498 result = PTR_ERR(ctx->cm_id); 499 goto err1; 500 } 501 502 resp.id = ctx->id; 503 if (copy_to_user((void __user *)(unsigned long)cmd.response, 504 &resp, sizeof(resp))) { 505 result = -EFAULT; 506 goto err2; 507 } 508 return 0; 509 510 err2: 511 ib_destroy_cm_id(ctx->cm_id); 512 err1: 513 mutex_lock(&ctx_id_mutex); 514 idr_remove(&ctx_id_table, ctx->id); 515 mutex_unlock(&ctx_id_mutex); 516 kfree(ctx); 517 return result; 518 } 519 520 static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, 521 const char __user *inbuf, 522 int in_len, int out_len) 523 { 524 struct ib_ucm_destroy_id cmd; 525 struct ib_ucm_destroy_id_resp resp; 526 struct ib_ucm_context *ctx; 527 int result = 0; 528 529 if (out_len < sizeof(resp)) 530 return -ENOSPC; 531 532 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 533 return -EFAULT; 534 535 mutex_lock(&ctx_id_mutex); 536 ctx = idr_find(&ctx_id_table, cmd.id); 537 if (!ctx) 538 ctx = ERR_PTR(-ENOENT); 539 else if (ctx->file != file) 540 ctx = ERR_PTR(-EINVAL); 541 else 542 idr_remove(&ctx_id_table, ctx->id); 543 mutex_unlock(&ctx_id_mutex); 544 545 if (IS_ERR(ctx)) 546 return PTR_ERR(ctx); 547 548 ib_ucm_ctx_put(ctx); 549 wait_for_completion(&ctx->comp); 550 551 /* No new events will be generated after destroying the cm_id. */ 552 ib_destroy_cm_id(ctx->cm_id); 553 /* Cleanup events not yet reported to the user. */ 554 ib_ucm_cleanup_events(ctx); 555 556 resp.events_reported = ctx->events_reported; 557 if (copy_to_user((void __user *)(unsigned long)cmd.response, 558 &resp, sizeof(resp))) 559 result = -EFAULT; 560 561 kfree(ctx); 562 return result; 563 } 564 565 static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, 566 const char __user *inbuf, 567 int in_len, int out_len) 568 { 569 struct ib_ucm_attr_id_resp resp; 570 struct ib_ucm_attr_id cmd; 571 struct ib_ucm_context *ctx; 572 int result = 0; 573 574 if (out_len < sizeof(resp)) 575 return -ENOSPC; 576 577 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 578 return -EFAULT; 579 580 ctx = ib_ucm_ctx_get(file, cmd.id); 581 if (IS_ERR(ctx)) 582 return PTR_ERR(ctx); 583 584 resp.service_id = ctx->cm_id->service_id; 585 resp.service_mask = ctx->cm_id->service_mask; 586 resp.local_id = ctx->cm_id->local_id; 587 resp.remote_id = ctx->cm_id->remote_id; 588 589 if (copy_to_user((void __user *)(unsigned long)cmd.response, 590 &resp, sizeof(resp))) 591 result = -EFAULT; 592 593 ib_ucm_ctx_put(ctx); 594 return result; 595 } 596 597 static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, 598 const char __user *inbuf, 599 int in_len, int out_len) 600 { 601 struct ib_uverbs_qp_attr resp; 602 struct ib_ucm_init_qp_attr cmd; 603 struct ib_ucm_context *ctx; 604 struct ib_qp_attr qp_attr; 605 int result = 0; 606 607 if (out_len < sizeof(resp)) 608 return -ENOSPC; 609 610 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 611 return -EFAULT; 612 613 ctx = ib_ucm_ctx_get(file, cmd.id); 614 if (IS_ERR(ctx)) 615 return PTR_ERR(ctx); 616 617 resp.qp_attr_mask = 0; 618 memset(&qp_attr, 0, sizeof qp_attr); 619 qp_attr.qp_state = cmd.qp_state; 620 result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); 621 if (result) 622 goto out; 623 624 ib_copy_qp_attr_to_user(&resp, &qp_attr); 625 626 if (copy_to_user((void __user *)(unsigned long)cmd.response, 627 &resp, sizeof(resp))) 628 result = -EFAULT; 629 630 out: 631 ib_ucm_ctx_put(ctx); 632 return result; 633 } 634 635 static int ucm_validate_listen(__be64 service_id, __be64 service_mask) 636 { 637 service_id &= service_mask; 638 639 if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) || 640 ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID)) 641 return -EINVAL; 642 643 return 0; 644 } 645 646 static ssize_t ib_ucm_listen(struct ib_ucm_file *file, 647 const char __user *inbuf, 648 int in_len, int out_len) 649 { 650 struct ib_ucm_listen cmd; 651 struct ib_ucm_context *ctx; 652 int result; 653 654 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 655 return -EFAULT; 656 657 ctx = ib_ucm_ctx_get(file, cmd.id); 658 if (IS_ERR(ctx)) 659 return PTR_ERR(ctx); 660 661 result = ucm_validate_listen(cmd.service_id, cmd.service_mask); 662 if (result) 663 goto out; 664 665 result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); 666 out: 667 ib_ucm_ctx_put(ctx); 668 return result; 669 } 670 671 static ssize_t ib_ucm_notify(struct ib_ucm_file *file, 672 const char __user *inbuf, 673 int in_len, int out_len) 674 { 675 struct ib_ucm_notify cmd; 676 struct ib_ucm_context *ctx; 677 int result; 678 679 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 680 return -EFAULT; 681 682 ctx = ib_ucm_ctx_get(file, cmd.id); 683 if (IS_ERR(ctx)) 684 return PTR_ERR(ctx); 685 686 result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event); 687 ib_ucm_ctx_put(ctx); 688 return result; 689 } 690 691 static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) 692 { 693 void *data; 694 695 *dest = NULL; 696 697 if (!len) 698 return 0; 699 700 data = memdup_user((void __user *)(unsigned long)src, len); 701 if (IS_ERR(data)) 702 return PTR_ERR(data); 703 704 *dest = data; 705 return 0; 706 } 707 708 static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) 709 { 710 struct ib_user_path_rec upath; 711 struct ib_sa_path_rec *sa_path; 712 713 *path = NULL; 714 715 if (!src) 716 return 0; 717 718 sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); 719 if (!sa_path) 720 return -ENOMEM; 721 722 if (copy_from_user(&upath, (void __user *)(unsigned long)src, 723 sizeof(upath))) { 724 725 kfree(sa_path); 726 return -EFAULT; 727 } 728 729 ib_copy_path_rec_from_user(sa_path, &upath); 730 *path = sa_path; 731 return 0; 732 } 733 734 static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, 735 const char __user *inbuf, 736 int in_len, int out_len) 737 { 738 struct ib_cm_req_param param; 739 struct ib_ucm_context *ctx; 740 struct ib_ucm_req cmd; 741 int result; 742 743 param.private_data = NULL; 744 param.primary_path = NULL; 745 param.alternate_path = NULL; 746 747 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 748 return -EFAULT; 749 750 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); 751 if (result) 752 goto done; 753 754 result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); 755 if (result) 756 goto done; 757 758 result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); 759 if (result) 760 goto done; 761 762 param.private_data_len = cmd.len; 763 param.service_id = cmd.sid; 764 param.qp_num = cmd.qpn; 765 param.qp_type = cmd.qp_type; 766 param.starting_psn = cmd.psn; 767 param.peer_to_peer = cmd.peer_to_peer; 768 param.responder_resources = cmd.responder_resources; 769 param.initiator_depth = cmd.initiator_depth; 770 param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; 771 param.flow_control = cmd.flow_control; 772 param.local_cm_response_timeout = cmd.local_cm_response_timeout; 773 param.retry_count = cmd.retry_count; 774 param.rnr_retry_count = cmd.rnr_retry_count; 775 param.max_cm_retries = cmd.max_cm_retries; 776 param.srq = cmd.srq; 777 778 ctx = ib_ucm_ctx_get(file, cmd.id); 779 if (!IS_ERR(ctx)) { 780 result = ib_send_cm_req(ctx->cm_id, ¶m); 781 ib_ucm_ctx_put(ctx); 782 } else 783 result = PTR_ERR(ctx); 784 785 done: 786 kfree(param.private_data); 787 kfree(param.primary_path); 788 kfree(param.alternate_path); 789 return result; 790 } 791 792 static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, 793 const char __user *inbuf, 794 int in_len, int out_len) 795 { 796 struct ib_cm_rep_param param; 797 struct ib_ucm_context *ctx; 798 struct ib_ucm_rep cmd; 799 int result; 800 801 param.private_data = NULL; 802 803 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 804 return -EFAULT; 805 806 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); 807 if (result) 808 return result; 809 810 param.qp_num = cmd.qpn; 811 param.starting_psn = cmd.psn; 812 param.private_data_len = cmd.len; 813 param.responder_resources = cmd.responder_resources; 814 param.initiator_depth = cmd.initiator_depth; 815 param.failover_accepted = cmd.failover_accepted; 816 param.flow_control = cmd.flow_control; 817 param.rnr_retry_count = cmd.rnr_retry_count; 818 param.srq = cmd.srq; 819 820 ctx = ib_ucm_ctx_get(file, cmd.id); 821 if (!IS_ERR(ctx)) { 822 ctx->uid = cmd.uid; 823 result = ib_send_cm_rep(ctx->cm_id, ¶m); 824 ib_ucm_ctx_put(ctx); 825 } else 826 result = PTR_ERR(ctx); 827 828 kfree(param.private_data); 829 return result; 830 } 831 832 static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, 833 const char __user *inbuf, int in_len, 834 int (*func)(struct ib_cm_id *cm_id, 835 const void *private_data, 836 u8 private_data_len)) 837 { 838 struct ib_ucm_private_data cmd; 839 struct ib_ucm_context *ctx; 840 const void *private_data = NULL; 841 int result; 842 843 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 844 return -EFAULT; 845 846 result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); 847 if (result) 848 return result; 849 850 ctx = ib_ucm_ctx_get(file, cmd.id); 851 if (!IS_ERR(ctx)) { 852 result = func(ctx->cm_id, private_data, cmd.len); 853 ib_ucm_ctx_put(ctx); 854 } else 855 result = PTR_ERR(ctx); 856 857 kfree(private_data); 858 return result; 859 } 860 861 static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, 862 const char __user *inbuf, 863 int in_len, int out_len) 864 { 865 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); 866 } 867 868 static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, 869 const char __user *inbuf, 870 int in_len, int out_len) 871 { 872 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); 873 } 874 875 static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, 876 const char __user *inbuf, 877 int in_len, int out_len) 878 { 879 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); 880 } 881 882 static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, 883 const char __user *inbuf, int in_len, 884 int (*func)(struct ib_cm_id *cm_id, 885 int status, 886 const void *info, 887 u8 info_len, 888 const void *data, 889 u8 data_len)) 890 { 891 struct ib_ucm_context *ctx; 892 struct ib_ucm_info cmd; 893 const void *data = NULL; 894 const void *info = NULL; 895 int result; 896 897 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 898 return -EFAULT; 899 900 result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); 901 if (result) 902 goto done; 903 904 result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); 905 if (result) 906 goto done; 907 908 ctx = ib_ucm_ctx_get(file, cmd.id); 909 if (!IS_ERR(ctx)) { 910 result = func(ctx->cm_id, cmd.status, info, cmd.info_len, 911 data, cmd.data_len); 912 ib_ucm_ctx_put(ctx); 913 } else 914 result = PTR_ERR(ctx); 915 916 done: 917 kfree(data); 918 kfree(info); 919 return result; 920 } 921 922 static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, 923 const char __user *inbuf, 924 int in_len, int out_len) 925 { 926 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); 927 } 928 929 static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, 930 const char __user *inbuf, 931 int in_len, int out_len) 932 { 933 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); 934 } 935 936 static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, 937 const char __user *inbuf, 938 int in_len, int out_len) 939 { 940 struct ib_ucm_context *ctx; 941 struct ib_ucm_mra cmd; 942 const void *data = NULL; 943 int result; 944 945 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 946 return -EFAULT; 947 948 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); 949 if (result) 950 return result; 951 952 ctx = ib_ucm_ctx_get(file, cmd.id); 953 if (!IS_ERR(ctx)) { 954 result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); 955 ib_ucm_ctx_put(ctx); 956 } else 957 result = PTR_ERR(ctx); 958 959 kfree(data); 960 return result; 961 } 962 963 static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, 964 const char __user *inbuf, 965 int in_len, int out_len) 966 { 967 struct ib_ucm_context *ctx; 968 struct ib_sa_path_rec *path = NULL; 969 struct ib_ucm_lap cmd; 970 const void *data = NULL; 971 int result; 972 973 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 974 return -EFAULT; 975 976 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); 977 if (result) 978 goto done; 979 980 result = ib_ucm_path_get(&path, cmd.path); 981 if (result) 982 goto done; 983 984 ctx = ib_ucm_ctx_get(file, cmd.id); 985 if (!IS_ERR(ctx)) { 986 result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); 987 ib_ucm_ctx_put(ctx); 988 } else 989 result = PTR_ERR(ctx); 990 991 done: 992 kfree(data); 993 kfree(path); 994 return result; 995 } 996 997 static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, 998 const char __user *inbuf, 999 int in_len, int out_len) 1000 { 1001 struct ib_cm_sidr_req_param param; 1002 struct ib_ucm_context *ctx; 1003 struct ib_ucm_sidr_req cmd; 1004 int result; 1005 1006 param.private_data = NULL; 1007 param.path = NULL; 1008 1009 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 1010 return -EFAULT; 1011 1012 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); 1013 if (result) 1014 goto done; 1015 1016 result = ib_ucm_path_get(¶m.path, cmd.path); 1017 if (result) 1018 goto done; 1019 1020 param.private_data_len = cmd.len; 1021 param.service_id = cmd.sid; 1022 param.timeout_ms = cmd.timeout; 1023 param.max_cm_retries = cmd.max_cm_retries; 1024 1025 ctx = ib_ucm_ctx_get(file, cmd.id); 1026 if (!IS_ERR(ctx)) { 1027 result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); 1028 ib_ucm_ctx_put(ctx); 1029 } else 1030 result = PTR_ERR(ctx); 1031 1032 done: 1033 kfree(param.private_data); 1034 kfree(param.path); 1035 return result; 1036 } 1037 1038 static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, 1039 const char __user *inbuf, 1040 int in_len, int out_len) 1041 { 1042 struct ib_cm_sidr_rep_param param; 1043 struct ib_ucm_sidr_rep cmd; 1044 struct ib_ucm_context *ctx; 1045 int result; 1046 1047 param.info = NULL; 1048 1049 if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 1050 return -EFAULT; 1051 1052 result = ib_ucm_alloc_data(¶m.private_data, 1053 cmd.data, cmd.data_len); 1054 if (result) 1055 goto done; 1056 1057 result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); 1058 if (result) 1059 goto done; 1060 1061 param.qp_num = cmd.qpn; 1062 param.qkey = cmd.qkey; 1063 param.status = cmd.status; 1064 param.info_length = cmd.info_len; 1065 param.private_data_len = cmd.data_len; 1066 1067 ctx = ib_ucm_ctx_get(file, cmd.id); 1068 if (!IS_ERR(ctx)) { 1069 result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); 1070 ib_ucm_ctx_put(ctx); 1071 } else 1072 result = PTR_ERR(ctx); 1073 1074 done: 1075 kfree(param.private_data); 1076 kfree(param.info); 1077 return result; 1078 } 1079 1080 static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, 1081 const char __user *inbuf, 1082 int in_len, int out_len) = { 1083 [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, 1084 [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, 1085 [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, 1086 [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, 1087 [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify, 1088 [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, 1089 [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, 1090 [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, 1091 [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, 1092 [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, 1093 [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, 1094 [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, 1095 [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, 1096 [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, 1097 [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, 1098 [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, 1099 [IB_USER_CM_CMD_EVENT] = ib_ucm_event, 1100 [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, 1101 }; 1102 1103 static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, 1104 size_t len, loff_t *pos) 1105 { 1106 struct ib_ucm_file *file = filp->private_data; 1107 struct ib_ucm_cmd_hdr hdr; 1108 ssize_t result; 1109 1110 if (WARN_ON_ONCE(!ib_safe_file_access(filp))) 1111 return -EACCES; 1112 1113 if (len < sizeof(hdr)) 1114 return -EINVAL; 1115 1116 if (copy_from_user(&hdr, buf, sizeof(hdr))) 1117 return -EFAULT; 1118 1119 if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) 1120 return -EINVAL; 1121 1122 if (hdr.in + sizeof(hdr) > len) 1123 return -EINVAL; 1124 1125 result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), 1126 hdr.in, hdr.out); 1127 if (!result) 1128 result = len; 1129 1130 return result; 1131 } 1132 1133 static unsigned int ib_ucm_poll(struct file *filp, 1134 struct poll_table_struct *wait) 1135 { 1136 struct ib_ucm_file *file = filp->private_data; 1137 unsigned int mask = 0; 1138 1139 poll_wait(filp, &file->poll_wait, wait); 1140 1141 if (!list_empty(&file->events)) 1142 mask = POLLIN | POLLRDNORM; 1143 1144 return mask; 1145 } 1146 1147 /* 1148 * ib_ucm_open() does not need the BKL: 1149 * 1150 * - no global state is referred to; 1151 * - there is no ioctl method to race against; 1152 * - no further module initialization is required for open to work 1153 * after the device is registered. 1154 */ 1155 static int ib_ucm_open(struct inode *inode, struct file *filp) 1156 { 1157 struct ib_ucm_file *file; 1158 1159 file = kmalloc(sizeof(*file), GFP_KERNEL); 1160 if (!file) 1161 return -ENOMEM; 1162 1163 INIT_LIST_HEAD(&file->events); 1164 INIT_LIST_HEAD(&file->ctxs); 1165 init_waitqueue_head(&file->poll_wait); 1166 1167 mutex_init(&file->file_mutex); 1168 1169 filp->private_data = file; 1170 file->filp = filp; 1171 file->device = container_of(inode->i_cdev->si_drv1, struct ib_ucm_device, cdev); 1172 1173 return nonseekable_open(inode, filp); 1174 } 1175 1176 static int ib_ucm_close(struct inode *inode, struct file *filp) 1177 { 1178 struct ib_ucm_file *file = filp->private_data; 1179 struct ib_ucm_context *ctx; 1180 1181 mutex_lock(&file->file_mutex); 1182 while (!list_empty(&file->ctxs)) { 1183 ctx = list_entry(file->ctxs.next, 1184 struct ib_ucm_context, file_list); 1185 mutex_unlock(&file->file_mutex); 1186 1187 mutex_lock(&ctx_id_mutex); 1188 idr_remove(&ctx_id_table, ctx->id); 1189 mutex_unlock(&ctx_id_mutex); 1190 1191 ib_destroy_cm_id(ctx->cm_id); 1192 ib_ucm_cleanup_events(ctx); 1193 kfree(ctx); 1194 1195 mutex_lock(&file->file_mutex); 1196 } 1197 mutex_unlock(&file->file_mutex); 1198 kfree(file); 1199 return 0; 1200 } 1201 1202 static DECLARE_BITMAP(overflow_map, IB_UCM_MAX_DEVICES); 1203 static void ib_ucm_release_dev(struct device *dev) 1204 { 1205 struct ib_ucm_device *ucm_dev; 1206 1207 ucm_dev = container_of(dev, struct ib_ucm_device, dev); 1208 cdev_del(&ucm_dev->cdev); 1209 if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) 1210 clear_bit(ucm_dev->devnum, dev_map); 1211 else 1212 clear_bit(ucm_dev->devnum - IB_UCM_MAX_DEVICES, overflow_map); 1213 kfree(ucm_dev); 1214 } 1215 1216 static const struct file_operations ucm_fops = { 1217 .owner = THIS_MODULE, 1218 .open = ib_ucm_open, 1219 .release = ib_ucm_close, 1220 .write = ib_ucm_write, 1221 .poll = ib_ucm_poll, 1222 .llseek = no_llseek, 1223 }; 1224 1225 static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, 1226 char *buf) 1227 { 1228 struct ib_ucm_device *ucm_dev; 1229 1230 ucm_dev = container_of(dev, struct ib_ucm_device, dev); 1231 return sprintf(buf, "%s\n", ucm_dev->ib_dev->name); 1232 } 1233 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); 1234 1235 static dev_t overflow_maj; 1236 static int find_overflow_devnum(void) 1237 { 1238 int ret; 1239 1240 if (!overflow_maj) { 1241 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES, 1242 "infiniband_cm"); 1243 if (ret) { 1244 pr_err("ucm: couldn't register dynamic device number\n"); 1245 return ret; 1246 } 1247 } 1248 1249 ret = find_first_zero_bit(overflow_map, IB_UCM_MAX_DEVICES); 1250 if (ret >= IB_UCM_MAX_DEVICES) 1251 return -1; 1252 1253 return ret; 1254 } 1255 1256 static void ib_ucm_add_one(struct ib_device *device) 1257 { 1258 int devnum; 1259 dev_t base; 1260 struct ib_ucm_device *ucm_dev; 1261 1262 if (!device->alloc_ucontext || !rdma_cap_ib_cm(device, 1)) 1263 return; 1264 1265 ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); 1266 if (!ucm_dev) 1267 return; 1268 1269 ucm_dev->ib_dev = device; 1270 1271 devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); 1272 if (devnum >= IB_UCM_MAX_DEVICES) { 1273 devnum = find_overflow_devnum(); 1274 if (devnum < 0) 1275 goto err; 1276 1277 ucm_dev->devnum = devnum + IB_UCM_MAX_DEVICES; 1278 base = devnum + overflow_maj; 1279 set_bit(devnum, overflow_map); 1280 } else { 1281 ucm_dev->devnum = devnum; 1282 base = devnum + IB_UCM_BASE_DEV; 1283 set_bit(devnum, dev_map); 1284 } 1285 1286 cdev_init(&ucm_dev->cdev, &ucm_fops); 1287 ucm_dev->cdev.owner = THIS_MODULE; 1288 kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum); 1289 if (cdev_add(&ucm_dev->cdev, base, 1)) 1290 goto err; 1291 1292 ucm_dev->dev.class = &cm_class; 1293 ucm_dev->dev.parent = device->dma_device; 1294 ucm_dev->dev.devt = ucm_dev->cdev.dev; 1295 ucm_dev->dev.release = ib_ucm_release_dev; 1296 dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum); 1297 if (device_register(&ucm_dev->dev)) 1298 goto err_cdev; 1299 1300 if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev)) 1301 goto err_dev; 1302 1303 ib_set_client_data(device, &ucm_client, ucm_dev); 1304 return; 1305 1306 err_dev: 1307 device_unregister(&ucm_dev->dev); 1308 err_cdev: 1309 cdev_del(&ucm_dev->cdev); 1310 if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) 1311 clear_bit(devnum, dev_map); 1312 else 1313 clear_bit(devnum, overflow_map); 1314 err: 1315 kfree(ucm_dev); 1316 return; 1317 } 1318 1319 static void ib_ucm_remove_one(struct ib_device *device, void *client_data) 1320 { 1321 struct ib_ucm_device *ucm_dev = client_data; 1322 1323 if (!ucm_dev) 1324 return; 1325 1326 device_unregister(&ucm_dev->dev); 1327 } 1328 1329 static CLASS_ATTR_STRING(abi_version, S_IRUGO, 1330 __stringify(IB_USER_CM_ABI_VERSION)); 1331 1332 static int __init ib_ucm_init(void) 1333 { 1334 int ret; 1335 1336 ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, 1337 "infiniband_cm"); 1338 if (ret) { 1339 pr_err("ucm: couldn't register device number\n"); 1340 goto error1; 1341 } 1342 1343 ret = class_create_file(&cm_class, &class_attr_abi_version.attr); 1344 if (ret) { 1345 pr_err("ucm: couldn't create abi_version attribute\n"); 1346 goto error2; 1347 } 1348 1349 ret = ib_register_client(&ucm_client); 1350 if (ret) { 1351 pr_err("ucm: couldn't register client\n"); 1352 goto error3; 1353 } 1354 return 0; 1355 1356 error3: 1357 class_remove_file(&cm_class, &class_attr_abi_version.attr); 1358 error2: 1359 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); 1360 error1: 1361 return ret; 1362 } 1363 1364 static void __exit ib_ucm_cleanup(void) 1365 { 1366 ib_unregister_client(&ucm_client); 1367 class_remove_file(&cm_class, &class_attr_abi_version.attr); 1368 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); 1369 if (overflow_maj) 1370 unregister_chrdev_region(overflow_maj, IB_UCM_MAX_DEVICES); 1371 idr_destroy(&ctx_id_table); 1372 } 1373 1374 module_init_order(ib_ucm_init, SI_ORDER_FIFTH); 1375 module_exit_order(ib_ucm_cleanup, SI_ORDER_FIFTH);
Cache object: ca3e316a13e3f1243b16de7200a70b34
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