1/*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004 Topspin Communications. All rights reserved. 5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 6 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 7 * Copyright (c) 2008 Cisco. All rights reserved. 8 * 9 * This software is available to you under a choice of one of two 10 * licenses. You may choose to be licensed under the terms of the GNU 11 * General Public License (GPL) Version 2, available from the file 12 * COPYING in the main directory of this source tree, or the 13 * OpenIB.org BSD license below: 14 * 15 * Redistribution and use in source and binary forms, with or 16 * without modification, are permitted provided that the following 17 * conditions are met: 18 * 19 * - Redistributions of source code must retain the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer. 22 * 23 * - Redistributions in binary form must reproduce the above 24 * copyright notice, this list of conditions and the following 25 * disclaimer in the documentation and/or other materials 26 * provided with the distribution. 27 * 28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 29 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 31 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 32 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 33 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 34 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 35 * SOFTWARE. 36 */ 37 38#include <sys/cdefs.h> 39#define pr_fmt(fmt) "user_mad: " fmt 40 41#include <linux/module.h> 42#include <linux/device.h> 43#include <linux/err.h> 44#include <linux/fs.h> 45#include <linux/cdev.h> 46#include <linux/dma-mapping.h> 47#include <linux/poll.h> 48#include <linux/mutex.h> 49#include <linux/kref.h> 50#include <linux/compat.h> 51#include <linux/sched.h> 52#include <linux/semaphore.h> 53#include <linux/slab.h> 54 55#include <asm/uaccess.h> 56 57#include <rdma/ib_mad.h> 58#include <rdma/ib_user_mad.h> 59 60MODULE_AUTHOR("Roland Dreier"); 61MODULE_DESCRIPTION("InfiniBand userspace MAD packet access"); 62MODULE_LICENSE("Dual BSD/GPL"); 63 64enum { 65 IB_UMAD_MAX_PORTS = 64, 66 IB_UMAD_MAX_AGENTS = 32, 67 68 IB_UMAD_MAJOR = 231, 69 IB_UMAD_MINOR_BASE = 0 70}; 71 72/* 73 * Our lifetime rules for these structs are the following: 74 * device special file is opened, we take a reference on the 75 * ib_umad_port's struct ib_umad_device. We drop these 76 * references in the corresponding close(). 77 * 78 * In addition to references coming from open character devices, there 79 * is one more reference to each ib_umad_device representing the 80 * module's reference taken when allocating the ib_umad_device in 81 * ib_umad_add_one(). 82 * 83 * When destroying an ib_umad_device, we drop the module's reference. 84 */ 85 86struct ib_umad_port { 87 struct cdev cdev; 88 struct device *dev; 89 90 struct cdev sm_cdev; 91 struct device *sm_dev; 92 struct semaphore sm_sem; 93 94 struct mutex file_mutex; 95 struct list_head file_list; 96 97 struct ib_device *ib_dev; 98 struct ib_umad_device *umad_dev; 99 int dev_num; 100 u8 port_num; 101}; 102 103struct ib_umad_device { 104 struct kobject kobj; 105 struct ib_umad_port port[0]; 106}; 107 108struct ib_umad_file { 109 struct mutex mutex; 110 struct ib_umad_port *port; 111 struct list_head recv_list; 112 struct list_head send_list; 113 struct list_head port_list; 114 spinlock_t send_lock; 115 wait_queue_head_t recv_wait; 116 struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS]; 117 int agents_dead; 118 u8 use_pkey_index; 119 u8 already_used; 120}; 121 122struct ib_umad_packet { 123 struct ib_mad_send_buf *msg; 124 struct ib_mad_recv_wc *recv_wc; 125 struct list_head list; 126 int length; 127 struct ib_user_mad mad; 128}; 129 130static struct class *umad_class; 131 132#define base_dev MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE) 133 134static DEFINE_SPINLOCK(port_lock); 135static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS); 136 137static void ib_umad_add_one(struct ib_device *device); 138static void ib_umad_remove_one(struct ib_device *device, void *client_data); 139 140static void ib_umad_release_dev(struct kobject *kobj) 141{ 142 struct ib_umad_device *dev = 143 container_of(kobj, struct ib_umad_device, kobj); 144 145 kfree(dev); 146} 147 148static struct kobj_type ib_umad_dev_ktype = { 149 .release = ib_umad_release_dev, 150}; 151 152static int hdr_size(struct ib_umad_file *file) 153{ 154 return file->use_pkey_index ? sizeof (struct ib_user_mad_hdr) : 155 sizeof (struct ib_user_mad_hdr_old); 156} 157 158/* caller must hold file->mutex */ 159static struct ib_mad_agent *__get_agent(struct ib_umad_file *file, int id) 160{ 161 return file->agents_dead ? NULL : file->agent[id]; 162} 163 164static int queue_packet(struct ib_umad_file *file, 165 struct ib_mad_agent *agent, 166 struct ib_umad_packet *packet) 167{ 168 int ret = 1; 169 170 mutex_lock(&file->mutex); 171 172 for (packet->mad.hdr.id = 0; 173 packet->mad.hdr.id < IB_UMAD_MAX_AGENTS; 174 packet->mad.hdr.id++) 175 if (agent == __get_agent(file, packet->mad.hdr.id)) { 176 list_add_tail(&packet->list, &file->recv_list); 177 wake_up_interruptible(&file->recv_wait); 178 ret = 0; 179 break; 180 } 181 182 mutex_unlock(&file->mutex); 183 184 return ret; 185} 186 187static void dequeue_send(struct ib_umad_file *file, 188 struct ib_umad_packet *packet) 189{ 190 spin_lock_irq(&file->send_lock); 191 list_del(&packet->list); 192 spin_unlock_irq(&file->send_lock); 193} 194 195static void send_handler(struct ib_mad_agent *agent, 196 struct ib_mad_send_wc *send_wc) 197{ 198 struct ib_umad_file *file = agent->context; 199 struct ib_umad_packet *packet = send_wc->send_buf->context[0]; 200 201 dequeue_send(file, packet); 202 ib_destroy_ah(packet->msg->ah, RDMA_DESTROY_AH_SLEEPABLE); 203 ib_free_send_mad(packet->msg); 204 205 if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { 206 packet->length = IB_MGMT_MAD_HDR; 207 packet->mad.hdr.status = ETIMEDOUT; 208 if (!queue_packet(file, agent, packet)) 209 return; 210 } 211 kfree(packet); 212} 213 214static void recv_handler(struct ib_mad_agent *agent, 215 struct ib_mad_send_buf *send_buf, 216 struct ib_mad_recv_wc *mad_recv_wc) 217{ 218 struct ib_umad_file *file = agent->context; 219 struct ib_umad_packet *packet; 220 221 if (mad_recv_wc->wc->status != IB_WC_SUCCESS) 222 goto err1; 223 224 packet = kzalloc(sizeof *packet, GFP_KERNEL); 225 if (!packet) 226 goto err1; 227 228 packet->length = mad_recv_wc->mad_len; 229 packet->recv_wc = mad_recv_wc; 230 231 packet->mad.hdr.status = 0; 232 packet->mad.hdr.length = hdr_size(file) + mad_recv_wc->mad_len; 233 packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp); 234 packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid); 235 packet->mad.hdr.sl = mad_recv_wc->wc->sl; 236 packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits; 237 packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index; 238 packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH); 239 if (packet->mad.hdr.grh_present) { 240 struct ib_ah_attr ah_attr; 241 int ret; 242 243 ret = ib_init_ah_from_wc(agent->device, agent->port_num, 244 mad_recv_wc->wc, mad_recv_wc->recv_buf.grh, 245 &ah_attr); 246 if (ret) 247 goto err2; 248 249 packet->mad.hdr.gid_index = ah_attr.grh.sgid_index; 250 packet->mad.hdr.hop_limit = ah_attr.grh.hop_limit; 251 packet->mad.hdr.traffic_class = ah_attr.grh.traffic_class; 252 memcpy(packet->mad.hdr.gid, &ah_attr.grh.dgid, 16); 253 packet->mad.hdr.flow_label = cpu_to_be32(ah_attr.grh.flow_label); 254 } 255 256 if (queue_packet(file, agent, packet)) 257 goto err2; 258 return; 259 260err2: 261 kfree(packet); 262err1: 263 ib_free_recv_mad(mad_recv_wc); 264} 265 266static ssize_t copy_recv_mad(struct ib_umad_file *file, char __user *buf, 267 struct ib_umad_packet *packet, size_t count) 268{ 269 struct ib_mad_recv_buf *recv_buf; 270 int left, seg_payload, offset, max_seg_payload; 271 size_t seg_size; 272 273 recv_buf = &packet->recv_wc->recv_buf; 274 seg_size = packet->recv_wc->mad_seg_size; 275 276 /* We need enough room to copy the first (or only) MAD segment. */ 277 if ((packet->length <= seg_size && 278 count < hdr_size(file) + packet->length) || 279 (packet->length > seg_size && 280 count < hdr_size(file) + seg_size)) 281 return -EINVAL; 282 283 if (copy_to_user(buf, &packet->mad, hdr_size(file))) 284 return -EFAULT; 285 286 buf += hdr_size(file); 287 seg_payload = min_t(int, packet->length, seg_size); 288 if (copy_to_user(buf, recv_buf->mad, seg_payload)) 289 return -EFAULT; 290 291 if (seg_payload < packet->length) { 292 /* 293 * Multipacket RMPP MAD message. Copy remainder of message. 294 * Note that last segment may have a shorter payload. 295 */ 296 if (count < hdr_size(file) + packet->length) { 297 /* 298 * The buffer is too small, return the first RMPP segment, 299 * which includes the RMPP message length. 300 */ 301 return -ENOSPC; 302 } 303 offset = ib_get_mad_data_offset(recv_buf->mad->mad_hdr.mgmt_class); 304 max_seg_payload = seg_size - offset; 305 306 for (left = packet->length - seg_payload, buf += seg_payload; 307 left; left -= seg_payload, buf += seg_payload) { 308 recv_buf = container_of(recv_buf->list.next, 309 struct ib_mad_recv_buf, list); 310 seg_payload = min(left, max_seg_payload); 311 if (copy_to_user(buf, (char *)recv_buf->mad + offset, 312 seg_payload)) 313 return -EFAULT; 314 } 315 } 316 return hdr_size(file) + packet->length; 317} 318 319static ssize_t copy_send_mad(struct ib_umad_file *file, char __user *buf, 320 struct ib_umad_packet *packet, size_t count) 321{ 322 ssize_t size = hdr_size(file) + packet->length; 323 324 if (count < size) 325 return -EINVAL; 326 327 if (copy_to_user(buf, &packet->mad, hdr_size(file))) 328 return -EFAULT; 329 330 buf += hdr_size(file); 331 332 if (copy_to_user(buf, packet->mad.data, packet->length)) 333 return -EFAULT; 334 335 return size; 336} 337 338static ssize_t ib_umad_read(struct file *filp, char __user *buf, 339 size_t count, loff_t *pos) 340{ 341 struct ib_umad_file *file = filp->private_data; 342 struct ib_umad_packet *packet; 343 ssize_t ret; 344 345 if (count < hdr_size(file)) 346 return -EINVAL; 347 348 mutex_lock(&file->mutex); 349 350 while (list_empty(&file->recv_list)) { 351 mutex_unlock(&file->mutex); 352 353 if (filp->f_flags & O_NONBLOCK) 354 return -EAGAIN; 355 356 if (wait_event_interruptible(file->recv_wait, 357 !list_empty(&file->recv_list))) 358 return -ERESTARTSYS; 359 360 mutex_lock(&file->mutex); 361 } 362 363 packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); 364 list_del(&packet->list); 365 366 mutex_unlock(&file->mutex); 367 368 if (packet->recv_wc) 369 ret = copy_recv_mad(file, buf, packet, count); 370 else 371 ret = copy_send_mad(file, buf, packet, count); 372 373 if (ret < 0) { 374 /* Requeue packet */ 375 mutex_lock(&file->mutex); 376 list_add(&packet->list, &file->recv_list); 377 mutex_unlock(&file->mutex); 378 } else { 379 if (packet->recv_wc) 380 ib_free_recv_mad(packet->recv_wc); 381 kfree(packet); 382 } 383 return ret; 384} 385 386static int copy_rmpp_mad(struct ib_mad_send_buf *msg, const char __user *buf) 387{ 388 int left, seg; 389 390 /* Copy class specific header */ 391 if ((msg->hdr_len > IB_MGMT_RMPP_HDR) && 392 copy_from_user((char *)msg->mad + IB_MGMT_RMPP_HDR, buf + IB_MGMT_RMPP_HDR, 393 msg->hdr_len - IB_MGMT_RMPP_HDR)) 394 return -EFAULT; 395 396 /* All headers are in place. Copy data segments. */ 397 for (seg = 1, left = msg->data_len, buf += msg->hdr_len; left > 0; 398 seg++, left -= msg->seg_size, buf += msg->seg_size) { 399 if (copy_from_user(ib_get_rmpp_segment(msg, seg), buf, 400 min(left, msg->seg_size))) 401 return -EFAULT; 402 } 403 return 0; 404} 405 406static int same_destination(struct ib_user_mad_hdr *hdr1, 407 struct ib_user_mad_hdr *hdr2) 408{ 409 if (!hdr1->grh_present && !hdr2->grh_present) 410 return (hdr1->lid == hdr2->lid); 411 412 if (hdr1->grh_present && hdr2->grh_present) 413 return !memcmp(hdr1->gid, hdr2->gid, 16); 414 415 return 0; 416} 417 418static int is_duplicate(struct ib_umad_file *file, 419 struct ib_umad_packet *packet) 420{ 421 struct ib_umad_packet *sent_packet; 422 struct ib_mad_hdr *sent_hdr, *hdr; 423 424 hdr = (struct ib_mad_hdr *) packet->mad.data; 425 list_for_each_entry(sent_packet, &file->send_list, list) { 426 sent_hdr = (struct ib_mad_hdr *) sent_packet->mad.data; 427 428 if ((hdr->tid != sent_hdr->tid) || 429 (hdr->mgmt_class != sent_hdr->mgmt_class)) 430 continue; 431 432 /* 433 * No need to be overly clever here. If two new operations have 434 * the same TID, reject the second as a duplicate. This is more 435 * restrictive than required by the spec. 436 */ 437 if (!ib_response_mad(hdr)) { 438 if (!ib_response_mad(sent_hdr)) 439 return 1; 440 continue; 441 } else if (!ib_response_mad(sent_hdr)) 442 continue; 443 444 if (same_destination(&packet->mad.hdr, &sent_packet->mad.hdr)) 445 return 1; 446 } 447 448 return 0; 449} 450 451static ssize_t ib_umad_write(struct file *filp, const char __user *buf, 452 size_t count, loff_t *pos) 453{ 454 struct ib_umad_file *file = filp->private_data; 455 struct ib_umad_packet *packet; 456 struct ib_mad_agent *agent; 457 struct ib_ah_attr ah_attr; 458 struct ib_ah *ah; 459 struct ib_rmpp_mad *rmpp_mad; 460 __be64 *tid; 461 int ret, data_len, hdr_len, copy_offset, rmpp_active; 462 u8 base_version; 463 464 if (count < hdr_size(file) + IB_MGMT_RMPP_HDR) 465 return -EINVAL; 466 467 packet = kzalloc(sizeof *packet + IB_MGMT_RMPP_HDR, GFP_KERNEL); 468 if (!packet) 469 return -ENOMEM; 470 471 if (copy_from_user(&packet->mad, buf, hdr_size(file))) { 472 ret = -EFAULT; 473 goto err; 474 } 475 476 if (packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) { 477 ret = -EINVAL; 478 goto err; 479 } 480 481 buf += hdr_size(file); 482 483 if (copy_from_user(packet->mad.data, buf, IB_MGMT_RMPP_HDR)) { 484 ret = -EFAULT; 485 goto err; 486 } 487 488 mutex_lock(&file->mutex); 489 490 agent = __get_agent(file, packet->mad.hdr.id); 491 if (!agent) { 492 ret = -EINVAL; 493 goto err_up; 494 } 495 496 memset(&ah_attr, 0, sizeof ah_attr); 497 ah_attr.dlid = be16_to_cpu(packet->mad.hdr.lid); 498 ah_attr.sl = packet->mad.hdr.sl; 499 ah_attr.src_path_bits = packet->mad.hdr.path_bits; 500 ah_attr.port_num = file->port->port_num; 501 if (packet->mad.hdr.grh_present) { 502 ah_attr.ah_flags = IB_AH_GRH; 503 memcpy(ah_attr.grh.dgid.raw, packet->mad.hdr.gid, 16); 504 ah_attr.grh.sgid_index = packet->mad.hdr.gid_index; 505 ah_attr.grh.flow_label = be32_to_cpu(packet->mad.hdr.flow_label); 506 ah_attr.grh.hop_limit = packet->mad.hdr.hop_limit; 507 ah_attr.grh.traffic_class = packet->mad.hdr.traffic_class; 508 } 509 510 ah = ib_create_user_ah(agent->qp->pd, &ah_attr, NULL); 511 if (IS_ERR(ah)) { 512 ret = PTR_ERR(ah); 513 goto err_up; 514 } 515 516 rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data; 517 hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); 518 519 if (ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) 520 && ib_mad_kernel_rmpp_agent(agent)) { 521 copy_offset = IB_MGMT_RMPP_HDR; 522 rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & 523 IB_MGMT_RMPP_FLAG_ACTIVE; 524 } else { 525 copy_offset = IB_MGMT_MAD_HDR; 526 rmpp_active = 0; 527 } 528 529 base_version = ((struct ib_mad_hdr *)&packet->mad.data)->base_version; 530 data_len = count - hdr_size(file) - hdr_len; 531 packet->msg = ib_create_send_mad(agent, 532 be32_to_cpu(packet->mad.hdr.qpn), 533 packet->mad.hdr.pkey_index, rmpp_active, 534 hdr_len, data_len, GFP_KERNEL, 535 base_version); 536 if (IS_ERR(packet->msg)) { 537 ret = PTR_ERR(packet->msg); 538 goto err_ah; 539 } 540 541 packet->msg->ah = ah; 542 packet->msg->timeout_ms = packet->mad.hdr.timeout_ms; 543 packet->msg->retries = packet->mad.hdr.retries; 544 packet->msg->context[0] = packet; 545 546 /* Copy MAD header. Any RMPP header is already in place. */ 547 memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR); 548 549 if (!rmpp_active) { 550 if (copy_from_user((char *)packet->msg->mad + copy_offset, 551 buf + copy_offset, 552 hdr_len + data_len - copy_offset)) { 553 ret = -EFAULT; 554 goto err_msg; 555 } 556 } else { 557 ret = copy_rmpp_mad(packet->msg, buf); 558 if (ret) 559 goto err_msg; 560 } 561 562 /* 563 * Set the high-order part of the transaction ID to make MADs from 564 * different agents unique, and allow routing responses back to the 565 * original requestor. 566 */ 567 if (!ib_response_mad(packet->msg->mad)) { 568 tid = &((struct ib_mad_hdr *) packet->msg->mad)->tid; 569 *tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | 570 (be64_to_cpup(tid) & 0xffffffff)); 571 rmpp_mad->mad_hdr.tid = *tid; 572 } 573 574 if (!ib_mad_kernel_rmpp_agent(agent) 575 && ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) 576 && (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE)) { 577 spin_lock_irq(&file->send_lock); 578 list_add_tail(&packet->list, &file->send_list); 579 spin_unlock_irq(&file->send_lock); 580 } else { 581 spin_lock_irq(&file->send_lock); 582 ret = is_duplicate(file, packet); 583 if (!ret) 584 list_add_tail(&packet->list, &file->send_list); 585 spin_unlock_irq(&file->send_lock); 586 if (ret) { 587 ret = -EINVAL; 588 goto err_msg; 589 } 590 } 591 592 ret = ib_post_send_mad(packet->msg, NULL); 593 if (ret) 594 goto err_send; 595 596 mutex_unlock(&file->mutex); 597 return count; 598 599err_send: 600 dequeue_send(file, packet); 601err_msg: 602 ib_free_send_mad(packet->msg); 603err_ah: 604 ib_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE); 605err_up: 606 mutex_unlock(&file->mutex); 607err: 608 kfree(packet); 609 return ret; 610} 611 612static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait) 613{ 614 struct ib_umad_file *file = filp->private_data; 615 616 /* we will always be able to post a MAD send */ 617 unsigned int mask = POLLOUT | POLLWRNORM; 618 619 poll_wait(filp, &file->recv_wait, wait); 620 621 if (!list_empty(&file->recv_list)) 622 mask |= POLLIN | POLLRDNORM; 623 624 return mask; 625} 626 627static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg, 628 int compat_method_mask) 629{ 630 struct ib_user_mad_reg_req ureq; 631 struct ib_mad_reg_req req; 632 struct ib_mad_agent *agent = NULL; 633 int agent_id; 634 int ret; 635 636 mutex_lock(&file->port->file_mutex); 637 mutex_lock(&file->mutex); 638 639 if (!file->port->ib_dev) { 640 dev_notice(file->port->dev, 641 "ib_umad_reg_agent: invalid device\n"); 642 ret = -EPIPE; 643 goto out; 644 } 645 646 if (copy_from_user(&ureq, arg, sizeof ureq)) { 647 ret = -EFAULT; 648 goto out; 649 } 650 651 if (ureq.qpn != 0 && ureq.qpn != 1) { 652 dev_notice(file->port->dev, 653 "ib_umad_reg_agent: invalid QPN %d specified\n", 654 ureq.qpn); 655 ret = -EINVAL; 656 goto out; 657 } 658 659 for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) 660 if (!__get_agent(file, agent_id)) 661 goto found; 662 663 dev_notice(file->port->dev, 664 "ib_umad_reg_agent: Max Agents (%u) reached\n", 665 IB_UMAD_MAX_AGENTS); 666 ret = -ENOMEM; 667 goto out; 668 669found: 670 if (ureq.mgmt_class) { 671 memset(&req, 0, sizeof(req)); 672 req.mgmt_class = ureq.mgmt_class; 673 req.mgmt_class_version = ureq.mgmt_class_version; 674 memcpy(req.oui, ureq.oui, sizeof req.oui); 675 676 if (compat_method_mask) { 677 u32 *umm = (u32 *) ureq.method_mask; 678 int i; 679 680 for (i = 0; i < BITS_TO_LONGS(IB_MGMT_MAX_METHODS); ++i) 681 req.method_mask[i] = 682 umm[i * 2] | ((u64) umm[i * 2 + 1] << 32); 683 } else 684 memcpy(req.method_mask, ureq.method_mask, 685 sizeof req.method_mask); 686 } 687 688 agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, 689 ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, 690 ureq.mgmt_class ? &req : NULL, 691 ureq.rmpp_version, 692 send_handler, recv_handler, file, 0); 693 if (IS_ERR(agent)) { 694 ret = PTR_ERR(agent); 695 agent = NULL; 696 goto out; 697 } 698 699 if (put_user(agent_id, 700 (u32 __user *) ((char *)arg + offsetof(struct ib_user_mad_reg_req, id)))) { 701 ret = -EFAULT; 702 goto out; 703 } 704 705 if (!file->already_used) { 706 file->already_used = 1; 707 if (!file->use_pkey_index) { 708 dev_warn(file->port->dev, 709 "process %s did not enable P_Key index support.\n", 710 current->comm); 711 dev_warn(file->port->dev, 712 " Documentation/infiniband/user_mad.txt has info on the new ABI.\n"); 713 } 714 } 715 716 file->agent[agent_id] = agent; 717 ret = 0; 718 719out: 720 mutex_unlock(&file->mutex); 721 722 if (ret && agent) 723 ib_unregister_mad_agent(agent); 724 725 mutex_unlock(&file->port->file_mutex); 726 727 return ret; 728} 729 730static int ib_umad_reg_agent2(struct ib_umad_file *file, void __user *arg) 731{ 732 struct ib_user_mad_reg_req2 ureq; 733 struct ib_mad_reg_req req; 734 struct ib_mad_agent *agent = NULL; 735 int agent_id; 736 int ret; 737 738 mutex_lock(&file->port->file_mutex); 739 mutex_lock(&file->mutex); 740 741 if (!file->port->ib_dev) { 742 dev_notice(file->port->dev, 743 "ib_umad_reg_agent2: invalid device\n"); 744 ret = -EPIPE; 745 goto out; 746 } 747 748 if (copy_from_user(&ureq, arg, sizeof(ureq))) { 749 ret = -EFAULT; 750 goto out; 751 } 752 753 if (ureq.qpn != 0 && ureq.qpn != 1) { 754 dev_notice(file->port->dev, 755 "ib_umad_reg_agent2: invalid QPN %d specified\n", 756 ureq.qpn); 757 ret = -EINVAL; 758 goto out; 759 } 760 761 if (ureq.flags & ~IB_USER_MAD_REG_FLAGS_CAP) { 762 const u32 flags = IB_USER_MAD_REG_FLAGS_CAP; 763 dev_notice(file->port->dev, 764 "ib_umad_reg_agent2 failed: invalid registration flags specified 0x%x; supported 0x%x\n", 765 ureq.flags, IB_USER_MAD_REG_FLAGS_CAP); 766 ret = -EINVAL; 767 768 if (put_user(flags, 769 (u32 __user *) ((char *)arg + offsetof(struct 770 ib_user_mad_reg_req2, flags)))) 771 ret = -EFAULT; 772 773 goto out; 774 } 775 776 for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) 777 if (!__get_agent(file, agent_id)) 778 goto found; 779 780 dev_notice(file->port->dev, 781 "ib_umad_reg_agent2: Max Agents (%u) reached\n", 782 IB_UMAD_MAX_AGENTS); 783 ret = -ENOMEM; 784 goto out; 785 786found: 787 if (ureq.mgmt_class) { 788 memset(&req, 0, sizeof(req)); 789 req.mgmt_class = ureq.mgmt_class; 790 req.mgmt_class_version = ureq.mgmt_class_version; 791 if (ureq.oui & 0xff000000) { 792 dev_notice(file->port->dev, 793 "ib_umad_reg_agent2 failed: oui invalid 0x%08x\n", 794 ureq.oui); 795 ret = -EINVAL; 796 goto out; 797 } 798 req.oui[2] = ureq.oui & 0x0000ff; 799 req.oui[1] = (ureq.oui & 0x00ff00) >> 8; 800 req.oui[0] = (ureq.oui & 0xff0000) >> 16; 801 memcpy(req.method_mask, ureq.method_mask, 802 sizeof(req.method_mask)); 803 } 804 805 agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, 806 ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, 807 ureq.mgmt_class ? &req : NULL, 808 ureq.rmpp_version, 809 send_handler, recv_handler, file, 810 ureq.flags); 811 if (IS_ERR(agent)) { 812 ret = PTR_ERR(agent); 813 agent = NULL; 814 goto out; 815 } 816 817 if (put_user(agent_id, 818 (u32 __user *)((char *)arg + 819 offsetof(struct ib_user_mad_reg_req2, id)))) { 820 ret = -EFAULT; 821 goto out; 822 } 823 824 if (!file->already_used) { 825 file->already_used = 1; 826 file->use_pkey_index = 1; 827 } 828 829 file->agent[agent_id] = agent; 830 ret = 0; 831 832out: 833 mutex_unlock(&file->mutex); 834 835 if (ret && agent) 836 ib_unregister_mad_agent(agent); 837 838 mutex_unlock(&file->port->file_mutex); 839 840 return ret; 841} 842 843 844static int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg) 845{ 846 struct ib_mad_agent *agent = NULL; 847 u32 id; 848 int ret = 0; 849 850 if (get_user(id, arg)) 851 return -EFAULT; 852 853 mutex_lock(&file->port->file_mutex); 854 mutex_lock(&file->mutex); 855 856 if (id >= IB_UMAD_MAX_AGENTS || !__get_agent(file, id)) { 857 ret = -EINVAL; 858 goto out; 859 } 860 861 agent = file->agent[id]; 862 file->agent[id] = NULL; 863 864out: 865 mutex_unlock(&file->mutex); 866 867 if (agent) 868 ib_unregister_mad_agent(agent); 869 870 mutex_unlock(&file->port->file_mutex); 871 872 return ret; 873} 874 875static long ib_umad_enable_pkey(struct ib_umad_file *file) 876{ 877 int ret = 0; 878 879 mutex_lock(&file->mutex); 880 if (file->already_used) 881 ret = -EINVAL; 882 else 883 file->use_pkey_index = 1; 884 mutex_unlock(&file->mutex); 885 886 return ret; 887} 888 889static long ib_umad_ioctl(struct file *filp, unsigned int cmd, 890 unsigned long arg) 891{ 892 switch (cmd) { 893 case IB_USER_MAD_REGISTER_AGENT: 894 return ib_umad_reg_agent(filp->private_data, (void __user *) arg, 0); 895 case IB_USER_MAD_UNREGISTER_AGENT: 896 return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg); 897 case IB_USER_MAD_ENABLE_PKEY: 898 return ib_umad_enable_pkey(filp->private_data); 899 case IB_USER_MAD_REGISTER_AGENT2: 900 return ib_umad_reg_agent2(filp->private_data, (void __user *) arg); 901 default: 902 return -ENOIOCTLCMD; 903 } 904} 905 906#ifdef CONFIG_COMPAT 907static long ib_umad_compat_ioctl(struct file *filp, unsigned int cmd, 908 unsigned long arg) 909{ 910 switch (cmd) { 911 case IB_USER_MAD_REGISTER_AGENT: 912 return ib_umad_reg_agent(filp->private_data, compat_ptr(arg), 1); 913 case IB_USER_MAD_UNREGISTER_AGENT: 914 return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg)); 915 case IB_USER_MAD_ENABLE_PKEY: 916 return ib_umad_enable_pkey(filp->private_data); 917 case IB_USER_MAD_REGISTER_AGENT2: 918 return ib_umad_reg_agent2(filp->private_data, compat_ptr(arg)); 919 default: 920 return -ENOIOCTLCMD; 921 } 922} 923#endif 924 925/* 926 * ib_umad_open() does not need the BKL: 927 * 928 * - the ib_umad_port structures are properly reference counted, and 929 * everything else is purely local to the file being created, so 930 * races against other open calls are not a problem; 931 * - the ioctl method does not affect any global state outside of the 932 * file structure being operated on; 933 */ 934static int ib_umad_open(struct inode *inode, struct file *filp) 935{ 936 struct ib_umad_port *port; 937 struct ib_umad_file *file; 938 int ret = -ENXIO; 939 940 port = container_of(inode->i_cdev->si_drv1, struct ib_umad_port, cdev); 941 942 mutex_lock(&port->file_mutex); 943 944 if (!port->ib_dev) 945 goto out; 946 947 ret = -ENOMEM; 948 file = kzalloc(sizeof *file, GFP_KERNEL); 949 if (!file) 950 goto out; 951 952 mutex_init(&file->mutex); 953 spin_lock_init(&file->send_lock); 954 INIT_LIST_HEAD(&file->recv_list); 955 INIT_LIST_HEAD(&file->send_list); 956 init_waitqueue_head(&file->recv_wait); 957 958 file->port = port; 959 filp->private_data = file; 960 961 list_add_tail(&file->port_list, &port->file_list); 962 963 ret = nonseekable_open(inode, filp); 964 if (ret) { 965 list_del(&file->port_list); 966 kfree(file); 967 goto out; 968 } 969 970 kobject_get(&port->umad_dev->kobj); 971 972out: 973 mutex_unlock(&port->file_mutex); 974 return ret; 975} 976 977static int ib_umad_close(struct inode *inode, struct file *filp) 978{ 979 struct ib_umad_file *file = filp->private_data; 980 struct ib_umad_device *dev = file->port->umad_dev; 981 struct ib_umad_packet *packet, *tmp; 982 int already_dead; 983 int i; 984 985 mutex_lock(&file->port->file_mutex); 986 mutex_lock(&file->mutex); 987 988 already_dead = file->agents_dead; 989 file->agents_dead = 1; 990 991 list_for_each_entry_safe(packet, tmp, &file->recv_list, list) { 992 if (packet->recv_wc) 993 ib_free_recv_mad(packet->recv_wc); 994 kfree(packet); 995 } 996 997 list_del(&file->port_list); 998 999 mutex_unlock(&file->mutex); 1000 1001 if (!already_dead) 1002 for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i) 1003 if (file->agent[i]) 1004 ib_unregister_mad_agent(file->agent[i]); 1005 1006 mutex_unlock(&file->port->file_mutex); 1007 1008 kfree(file); 1009 kobject_put(&dev->kobj); 1010 1011 return 0; 1012} 1013 1014static const struct file_operations umad_fops = { 1015 .owner = THIS_MODULE, 1016 .read = ib_umad_read, 1017 .write = ib_umad_write, 1018 .poll = ib_umad_poll, 1019 .unlocked_ioctl = ib_umad_ioctl, 1020#ifdef CONFIG_COMPAT 1021 .compat_ioctl = ib_umad_compat_ioctl, 1022#endif 1023 .open = ib_umad_open, 1024 .release = ib_umad_close, 1025 .llseek = no_llseek, 1026}; 1027 1028static int ib_umad_sm_open(struct inode *inode, struct file *filp) 1029{ 1030 struct ib_umad_port *port; 1031 struct ib_port_modify props = { 1032 .set_port_cap_mask = IB_PORT_SM 1033 }; 1034 int ret; 1035 1036 port = container_of(inode->i_cdev->si_drv1, struct ib_umad_port, sm_cdev); 1037 1038 if (filp->f_flags & O_NONBLOCK) { 1039 if (down_trylock(&port->sm_sem)) { 1040 ret = -EAGAIN; 1041 goto fail; 1042 } 1043 } else { 1044 if (down_interruptible(&port->sm_sem)) { 1045 ret = -ERESTARTSYS; 1046 goto fail; 1047 } 1048 } 1049 1050 ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); 1051 if (ret) 1052 goto err_up_sem; 1053 1054 filp->private_data = port; 1055 1056 ret = nonseekable_open(inode, filp); 1057 if (ret) 1058 goto err_clr_sm_cap; 1059 1060 kobject_get(&port->umad_dev->kobj); 1061 1062 return 0; 1063 1064err_clr_sm_cap: 1065 swap(props.set_port_cap_mask, props.clr_port_cap_mask); 1066 ib_modify_port(port->ib_dev, port->port_num, 0, &props); 1067 1068err_up_sem: 1069 up(&port->sm_sem); 1070 1071fail: 1072 return ret; 1073} 1074 1075static int ib_umad_sm_close(struct inode *inode, struct file *filp) 1076{ 1077 struct ib_umad_port *port = filp->private_data; 1078 struct ib_port_modify props = { 1079 .clr_port_cap_mask = IB_PORT_SM 1080 }; 1081 int ret = 0; 1082 1083 mutex_lock(&port->file_mutex); 1084 if (port->ib_dev) 1085 ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); 1086 mutex_unlock(&port->file_mutex); 1087 1088 up(&port->sm_sem); 1089 1090 kobject_put(&port->umad_dev->kobj); 1091 1092 return ret; 1093} 1094 1095static const struct file_operations umad_sm_fops = { 1096 .owner = THIS_MODULE, 1097 .open = ib_umad_sm_open, 1098 .release = ib_umad_sm_close, 1099 .llseek = no_llseek, 1100}; 1101 1102static struct ib_client umad_client = { 1103 .name = "umad", 1104 .add = ib_umad_add_one, 1105 .remove = ib_umad_remove_one 1106}; 1107 1108static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, 1109 char *buf) 1110{ 1111 struct ib_umad_port *port = dev_get_drvdata(dev); 1112 1113 if (!port) 1114 return -ENODEV; 1115 1116 return sprintf(buf, "%s\n", port->ib_dev->name); 1117} 1118static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); 1119 1120static ssize_t show_port(struct device *dev, struct device_attribute *attr, 1121 char *buf) 1122{ 1123 struct ib_umad_port *port = dev_get_drvdata(dev); 1124 1125 if (!port) 1126 return -ENODEV; 1127 1128 return sprintf(buf, "%d\n", port->port_num); 1129} 1130static DEVICE_ATTR(port, S_IRUGO, show_port, NULL); 1131 1132static CLASS_ATTR_STRING(abi_version, S_IRUGO, 1133 __stringify(IB_USER_MAD_ABI_VERSION)); 1134 1135static dev_t overflow_maj; 1136static DECLARE_BITMAP(overflow_map, IB_UMAD_MAX_PORTS); 1137static int find_overflow_devnum(struct ib_device *device) 1138{ 1139 int ret; 1140 1141 if (!overflow_maj) { 1142 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UMAD_MAX_PORTS * 2, 1143 "infiniband_mad"); 1144 if (ret) { 1145 dev_err(&device->dev, 1146 "couldn't register dynamic device number\n"); 1147 return ret; 1148 } 1149 } 1150 1151 ret = find_first_zero_bit(overflow_map, IB_UMAD_MAX_PORTS); 1152 if (ret >= IB_UMAD_MAX_PORTS) 1153 return -1; 1154 1155 return ret; 1156} 1157 1158static int ib_umad_init_port(struct ib_device *device, int port_num, 1159 struct ib_umad_device *umad_dev, 1160 struct ib_umad_port *port) 1161{ 1162 int devnum; 1163 dev_t base; 1164 1165 spin_lock(&port_lock); 1166 devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS); 1167 if (devnum >= IB_UMAD_MAX_PORTS) { 1168 spin_unlock(&port_lock); 1169 devnum = find_overflow_devnum(device); 1170 if (devnum < 0) 1171 return -1; 1172 1173 spin_lock(&port_lock); 1174 port->dev_num = devnum + IB_UMAD_MAX_PORTS; 1175 base = devnum + overflow_maj; 1176 set_bit(devnum, overflow_map); 1177 } else { 1178 port->dev_num = devnum; 1179 base = devnum + base_dev; 1180 set_bit(devnum, dev_map); 1181 } 1182 spin_unlock(&port_lock); 1183 1184 port->ib_dev = device; 1185 port->port_num = port_num; 1186 sema_init(&port->sm_sem, 1); 1187 mutex_init(&port->file_mutex); 1188 INIT_LIST_HEAD(&port->file_list); 1189 1190 cdev_init(&port->cdev, &umad_fops); 1191 port->cdev.owner = THIS_MODULE; 1192 port->cdev.kobj.parent = &umad_dev->kobj; 1193 kobject_set_name(&port->cdev.kobj, "umad%d", port->dev_num); 1194 if (cdev_add(&port->cdev, base, 1)) 1195 goto err_cdev; 1196 1197 port->dev = device_create(umad_class, device->dma_device, 1198 port->cdev.dev, port, 1199 "umad%d", port->dev_num); 1200 if (IS_ERR(port->dev)) 1201 goto err_cdev; 1202 1203 if (device_create_file(port->dev, &dev_attr_ibdev)) 1204 goto err_dev; 1205 if (device_create_file(port->dev, &dev_attr_port)) 1206 goto err_dev; 1207 1208 base += IB_UMAD_MAX_PORTS; 1209 cdev_init(&port->sm_cdev, &umad_sm_fops); 1210 port->sm_cdev.owner = THIS_MODULE; 1211 port->sm_cdev.kobj.parent = &umad_dev->kobj; 1212 kobject_set_name(&port->sm_cdev.kobj, "issm%d", port->dev_num); 1213 if (cdev_add(&port->sm_cdev, base, 1)) 1214 goto err_sm_cdev; 1215 1216 port->sm_dev = device_create(umad_class, device->dma_device, 1217 port->sm_cdev.dev, port, 1218 "issm%d", port->dev_num); 1219 if (IS_ERR(port->sm_dev)) 1220 goto err_sm_cdev; 1221 1222 if (device_create_file(port->sm_dev, &dev_attr_ibdev)) 1223 goto err_sm_dev; 1224 if (device_create_file(port->sm_dev, &dev_attr_port)) 1225 goto err_sm_dev; 1226 1227 return 0; 1228 1229err_sm_dev: 1230 device_destroy(umad_class, port->sm_cdev.dev); 1231 1232err_sm_cdev: 1233 cdev_del(&port->sm_cdev); 1234 1235err_dev: 1236 device_destroy(umad_class, port->cdev.dev); 1237 1238err_cdev: 1239 cdev_del(&port->cdev); 1240 if (port->dev_num < IB_UMAD_MAX_PORTS) 1241 clear_bit(devnum, dev_map); 1242 else 1243 clear_bit(devnum, overflow_map); 1244 1245 return -1; 1246} 1247 1248static void ib_umad_kill_port(struct ib_umad_port *port) 1249{ 1250 struct ib_umad_file *file; 1251 int id; 1252 1253 dev_set_drvdata(port->dev, NULL); 1254 dev_set_drvdata(port->sm_dev, NULL); 1255 1256 device_destroy(umad_class, port->cdev.dev); 1257 device_destroy(umad_class, port->sm_cdev.dev); 1258 1259 cdev_del(&port->cdev); 1260 cdev_del(&port->sm_cdev); 1261 1262 mutex_lock(&port->file_mutex); 1263 1264 port->ib_dev = NULL; 1265 1266 list_for_each_entry(file, &port->file_list, port_list) { 1267 mutex_lock(&file->mutex); 1268 file->agents_dead = 1; 1269 mutex_unlock(&file->mutex); 1270 1271 for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id) 1272 if (file->agent[id]) 1273 ib_unregister_mad_agent(file->agent[id]); 1274 } 1275 1276 mutex_unlock(&port->file_mutex); 1277 1278 if (port->dev_num < IB_UMAD_MAX_PORTS) 1279 clear_bit(port->dev_num, dev_map); 1280 else 1281 clear_bit(port->dev_num - IB_UMAD_MAX_PORTS, overflow_map); 1282} 1283 1284static void ib_umad_add_one(struct ib_device *device) 1285{ 1286 struct ib_umad_device *umad_dev; 1287 int s, e, i; 1288 int count = 0; 1289 1290 s = rdma_start_port(device); 1291 e = rdma_end_port(device); 1292 1293 umad_dev = kzalloc(sizeof *umad_dev + 1294 (e - s + 1) * sizeof (struct ib_umad_port), 1295 GFP_KERNEL); 1296 if (!umad_dev) 1297 return; 1298 1299 kobject_init(&umad_dev->kobj, &ib_umad_dev_ktype); 1300 1301 for (i = s; i <= e; ++i) { 1302 if (!rdma_cap_ib_mad(device, i)) 1303 continue; 1304 1305 umad_dev->port[i - s].umad_dev = umad_dev; 1306 1307 if (ib_umad_init_port(device, i, umad_dev, 1308 &umad_dev->port[i - s])) 1309 goto err; 1310 1311 count++; 1312 } 1313 1314 if (!count) 1315 goto free; 1316 1317 ib_set_client_data(device, &umad_client, umad_dev); 1318 1319 return; 1320 1321err: 1322 while (--i >= s) { 1323 if (!rdma_cap_ib_mad(device, i)) 1324 continue; 1325 1326 ib_umad_kill_port(&umad_dev->port[i - s]); 1327 } 1328free: 1329 kobject_put(&umad_dev->kobj); 1330} 1331 1332static void ib_umad_remove_one(struct ib_device *device, void *client_data) 1333{ 1334 struct ib_umad_device *umad_dev = client_data; 1335 int i; 1336 1337 if (!umad_dev) 1338 return; 1339 1340 for (i = 0; i <= rdma_end_port(device) - rdma_start_port(device); ++i) { 1341 if (rdma_cap_ib_mad(device, i + rdma_start_port(device))) 1342 ib_umad_kill_port(&umad_dev->port[i]); 1343 } 1344 1345 kobject_put(&umad_dev->kobj); 1346} 1347 1348static char *umad_devnode(struct device *dev, umode_t *mode) 1349{ 1350 return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); 1351} 1352 1353static int __init ib_umad_init(void) 1354{ 1355 int ret; 1356 1357 ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2, 1358 "infiniband_mad"); 1359 if (ret) { 1360 pr_err("couldn't register device number\n"); 1361 goto out; 1362 } 1363 1364 umad_class = class_create(THIS_MODULE, "infiniband_mad"); 1365 if (IS_ERR(umad_class)) { 1366 ret = PTR_ERR(umad_class); 1367 pr_err("couldn't create class infiniband_mad\n"); 1368 goto out_chrdev; 1369 } 1370 1371 umad_class->devnode = umad_devnode; 1372 1373 ret = class_create_file(umad_class, &class_attr_abi_version.attr); 1374 if (ret) { 1375 pr_err("couldn't create abi_version attribute\n"); 1376 goto out_class; 1377 } 1378 1379 ret = ib_register_client(&umad_client); 1380 if (ret) { 1381 pr_err("couldn't register ib_umad client\n"); 1382 goto out_class; 1383 } 1384 1385 return 0; 1386 1387out_class: 1388 class_destroy(umad_class); 1389 1390out_chrdev: 1391 unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); 1392 1393out: 1394 return ret; 1395} 1396 1397static void __exit ib_umad_cleanup(void) 1398{ 1399 ib_unregister_client(&umad_client); 1400 class_destroy(umad_class); 1401 unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); 1402 if (overflow_maj) 1403 unregister_chrdev_region(overflow_maj, IB_UMAD_MAX_PORTS * 2); 1404} 1405 1406module_init_order(ib_umad_init, SI_ORDER_FIFTH); 1407module_exit_order(ib_umad_cleanup, SI_ORDER_FIFTH); 1408