1 /* 2 * Copyright (c) 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved. 4 * Copyright (c) 2005 PathScale, Inc. All rights reserved. 5 * Copyright (c) 2006 Mellanox Technologies. 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 <linux/file.h> 37 #include <linux/fs.h> 38 #include <linux/slab.h> 39 #include <linux/sched.h> 40 41 #include <asm/uaccess.h> 42 43 #include "uverbs.h" 44 #include "core_priv.h" 45 46 struct uverbs_lock_class { 47 struct lock_class_key key; 48 char name[16]; 49 }; 50 51 static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" }; 52 static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" }; 53 static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" }; 54 static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" }; 55 static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" }; 56 static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" }; 57 static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" }; 58 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" }; 59 static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" }; 60 61 /* 62 * The ib_uobject locking scheme is as follows: 63 * 64 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it 65 * needs to be held during all idr write operations. When an object is 66 * looked up, a reference must be taken on the object's kref before 67 * dropping this lock. For read operations, the rcu_read_lock() 68 * and rcu_write_lock() but similarly the kref reference is grabbed 69 * before the rcu_read_unlock(). 70 * 71 * - Each object also has an rwsem. This rwsem must be held for 72 * reading while an operation that uses the object is performed. 73 * For example, while registering an MR, the associated PD's 74 * uobject.mutex must be held for reading. The rwsem must be held 75 * for writing while initializing or destroying an object. 76 * 77 * - In addition, each object has a "live" flag. If this flag is not 78 * set, then lookups of the object will fail even if it is found in 79 * the idr. This handles a reader that blocks and does not acquire 80 * the rwsem until after the object is destroyed. The destroy 81 * operation will set the live flag to 0 and then drop the rwsem; 82 * this will allow the reader to acquire the rwsem, see that the 83 * live flag is 0, and then drop the rwsem and its reference to 84 * object. The underlying storage will not be freed until the last 85 * reference to the object is dropped. 86 */ 87 88 static void init_uobj(struct ib_uobject *uobj, u64 user_handle, 89 struct ib_ucontext *context, struct uverbs_lock_class *c) 90 { 91 uobj->user_handle = user_handle; 92 uobj->context = context; 93 kref_init(&uobj->ref); 94 init_rwsem(&uobj->mutex); 95 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name); 96 uobj->live = 0; 97 } 98 99 static void release_uobj(struct kref *kref) 100 { 101 kfree_rcu(container_of(kref, struct ib_uobject, ref), rcu); 102 } 103 104 static void put_uobj(struct ib_uobject *uobj) 105 { 106 kref_put(&uobj->ref, release_uobj); 107 } 108 109 static void put_uobj_read(struct ib_uobject *uobj) 110 { 111 up_read(&uobj->mutex); 112 put_uobj(uobj); 113 } 114 115 static void put_uobj_write(struct ib_uobject *uobj) 116 { 117 up_write(&uobj->mutex); 118 put_uobj(uobj); 119 } 120 121 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj) 122 { 123 int ret; 124 125 idr_preload(GFP_KERNEL); 126 spin_lock(&ib_uverbs_idr_lock); 127 128 ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT); 129 if (ret >= 0) 130 uobj->id = ret; 131 132 spin_unlock(&ib_uverbs_idr_lock); 133 idr_preload_end(); 134 135 return ret < 0 ? ret : 0; 136 } 137 138 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj) 139 { 140 spin_lock(&ib_uverbs_idr_lock); 141 idr_remove(idr, uobj->id); 142 spin_unlock(&ib_uverbs_idr_lock); 143 } 144 145 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id, 146 struct ib_ucontext *context) 147 { 148 struct ib_uobject *uobj; 149 150 rcu_read_lock(); 151 uobj = idr_find(idr, id); 152 if (uobj) { 153 if (uobj->context == context) 154 kref_get(&uobj->ref); 155 else 156 uobj = NULL; 157 } 158 rcu_read_unlock(); 159 160 return uobj; 161 } 162 163 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id, 164 struct ib_ucontext *context, int nested) 165 { 166 struct ib_uobject *uobj; 167 168 uobj = __idr_get_uobj(idr, id, context); 169 if (!uobj) 170 return NULL; 171 172 if (nested) 173 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING); 174 else 175 down_read(&uobj->mutex); 176 if (!uobj->live) { 177 put_uobj_read(uobj); 178 return NULL; 179 } 180 181 return uobj; 182 } 183 184 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id, 185 struct ib_ucontext *context) 186 { 187 struct ib_uobject *uobj; 188 189 uobj = __idr_get_uobj(idr, id, context); 190 if (!uobj) 191 return NULL; 192 193 down_write(&uobj->mutex); 194 if (!uobj->live) { 195 put_uobj_write(uobj); 196 return NULL; 197 } 198 199 return uobj; 200 } 201 202 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context, 203 int nested) 204 { 205 struct ib_uobject *uobj; 206 207 uobj = idr_read_uobj(idr, id, context, nested); 208 return uobj ? uobj->object : NULL; 209 } 210 211 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context) 212 { 213 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0); 214 } 215 216 static void put_pd_read(struct ib_pd *pd) 217 { 218 put_uobj_read(pd->uobject); 219 } 220 221 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested) 222 { 223 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested); 224 } 225 226 static void put_cq_read(struct ib_cq *cq) 227 { 228 put_uobj_read(cq->uobject); 229 } 230 231 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context) 232 { 233 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0); 234 } 235 236 static void put_ah_read(struct ib_ah *ah) 237 { 238 put_uobj_read(ah->uobject); 239 } 240 241 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context) 242 { 243 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0); 244 } 245 246 static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context) 247 { 248 struct ib_uobject *uobj; 249 250 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context); 251 return uobj ? uobj->object : NULL; 252 } 253 254 static void put_qp_read(struct ib_qp *qp) 255 { 256 put_uobj_read(qp->uobject); 257 } 258 259 static void put_qp_write(struct ib_qp *qp) 260 { 261 put_uobj_write(qp->uobject); 262 } 263 264 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context) 265 { 266 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0); 267 } 268 269 static void put_srq_read(struct ib_srq *srq) 270 { 271 put_uobj_read(srq->uobject); 272 } 273 274 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context, 275 struct ib_uobject **uobj) 276 { 277 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0); 278 return *uobj ? (*uobj)->object : NULL; 279 } 280 281 static void put_xrcd_read(struct ib_uobject *uobj) 282 { 283 put_uobj_read(uobj); 284 } 285 286 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, 287 struct ib_device *ib_dev, 288 const char __user *buf, 289 int in_len, int out_len) 290 { 291 struct ib_uverbs_get_context cmd; 292 struct ib_uverbs_get_context_resp resp; 293 struct ib_udata udata; 294 struct ib_ucontext *ucontext; 295 struct file *filp; 296 int ret; 297 298 if (out_len < sizeof resp) 299 return -ENOSPC; 300 301 if (copy_from_user(&cmd, buf, sizeof cmd)) 302 return -EFAULT; 303 304 mutex_lock(&file->mutex); 305 306 if (file->ucontext) { 307 ret = -EINVAL; 308 goto err; 309 } 310 311 INIT_UDATA(&udata, buf + sizeof cmd, 312 (unsigned long) cmd.response + sizeof resp, 313 in_len - sizeof cmd, out_len - sizeof resp); 314 315 ucontext = ib_dev->alloc_ucontext(ib_dev, &udata); 316 if (IS_ERR(ucontext)) { 317 ret = PTR_ERR(ucontext); 318 goto err; 319 } 320 321 ucontext->device = ib_dev; 322 INIT_LIST_HEAD(&ucontext->pd_list); 323 INIT_LIST_HEAD(&ucontext->mr_list); 324 INIT_LIST_HEAD(&ucontext->mw_list); 325 INIT_LIST_HEAD(&ucontext->cq_list); 326 INIT_LIST_HEAD(&ucontext->qp_list); 327 INIT_LIST_HEAD(&ucontext->srq_list); 328 INIT_LIST_HEAD(&ucontext->ah_list); 329 INIT_LIST_HEAD(&ucontext->xrcd_list); 330 INIT_LIST_HEAD(&ucontext->rule_list); 331 rcu_read_lock(); 332 ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID); 333 rcu_read_unlock(); 334 ucontext->closing = 0; 335 336 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING 337 ucontext->umem_tree = RB_ROOT; 338 init_rwsem(&ucontext->umem_rwsem); 339 ucontext->odp_mrs_count = 0; 340 INIT_LIST_HEAD(&ucontext->no_private_counters); 341 342 if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING)) 343 ucontext->invalidate_range = NULL; 344 345 #endif 346 347 resp.num_comp_vectors = file->device->num_comp_vectors; 348 349 ret = get_unused_fd_flags(O_CLOEXEC); 350 if (ret < 0) 351 goto err_free; 352 resp.async_fd = ret; 353 354 filp = ib_uverbs_alloc_event_file(file, ib_dev, 1); 355 if (IS_ERR(filp)) { 356 ret = PTR_ERR(filp); 357 goto err_fd; 358 } 359 360 if (copy_to_user((void __user *) (unsigned long) cmd.response, 361 &resp, sizeof resp)) { 362 ret = -EFAULT; 363 goto err_file; 364 } 365 366 file->ucontext = ucontext; 367 368 fd_install(resp.async_fd, filp); 369 370 mutex_unlock(&file->mutex); 371 372 return in_len; 373 374 err_file: 375 ib_uverbs_free_async_event_file(file); 376 fput(filp); 377 378 err_fd: 379 put_unused_fd(resp.async_fd); 380 381 err_free: 382 put_pid(ucontext->tgid); 383 ib_dev->dealloc_ucontext(ucontext); 384 385 err: 386 mutex_unlock(&file->mutex); 387 return ret; 388 } 389 390 static void copy_query_dev_fields(struct ib_uverbs_file *file, 391 struct ib_device *ib_dev, 392 struct ib_uverbs_query_device_resp *resp, 393 struct ib_device_attr *attr) 394 { 395 resp->fw_ver = attr->fw_ver; 396 resp->node_guid = ib_dev->node_guid; 397 resp->sys_image_guid = attr->sys_image_guid; 398 resp->max_mr_size = attr->max_mr_size; 399 resp->page_size_cap = attr->page_size_cap; 400 resp->vendor_id = attr->vendor_id; 401 resp->vendor_part_id = attr->vendor_part_id; 402 resp->hw_ver = attr->hw_ver; 403 resp->max_qp = attr->max_qp; 404 resp->max_qp_wr = attr->max_qp_wr; 405 resp->device_cap_flags = attr->device_cap_flags; 406 resp->max_sge = attr->max_sge; 407 resp->max_sge_rd = attr->max_sge_rd; 408 resp->max_cq = attr->max_cq; 409 resp->max_cqe = attr->max_cqe; 410 resp->max_mr = attr->max_mr; 411 resp->max_pd = attr->max_pd; 412 resp->max_qp_rd_atom = attr->max_qp_rd_atom; 413 resp->max_ee_rd_atom = attr->max_ee_rd_atom; 414 resp->max_res_rd_atom = attr->max_res_rd_atom; 415 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; 416 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; 417 resp->atomic_cap = attr->atomic_cap; 418 resp->max_ee = attr->max_ee; 419 resp->max_rdd = attr->max_rdd; 420 resp->max_mw = attr->max_mw; 421 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; 422 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; 423 resp->max_mcast_grp = attr->max_mcast_grp; 424 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; 425 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; 426 resp->max_ah = attr->max_ah; 427 resp->max_fmr = attr->max_fmr; 428 resp->max_map_per_fmr = attr->max_map_per_fmr; 429 resp->max_srq = attr->max_srq; 430 resp->max_srq_wr = attr->max_srq_wr; 431 resp->max_srq_sge = attr->max_srq_sge; 432 resp->max_pkeys = attr->max_pkeys; 433 resp->local_ca_ack_delay = attr->local_ca_ack_delay; 434 resp->phys_port_cnt = ib_dev->phys_port_cnt; 435 } 436 437 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file, 438 struct ib_device *ib_dev, 439 const char __user *buf, 440 int in_len, int out_len) 441 { 442 struct ib_uverbs_query_device cmd; 443 struct ib_uverbs_query_device_resp resp; 444 445 if (out_len < sizeof resp) 446 return -ENOSPC; 447 448 if (copy_from_user(&cmd, buf, sizeof cmd)) 449 return -EFAULT; 450 451 memset(&resp, 0, sizeof resp); 452 copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs); 453 454 if (copy_to_user((void __user *) (unsigned long) cmd.response, 455 &resp, sizeof resp)) 456 return -EFAULT; 457 458 return in_len; 459 } 460 461 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file, 462 struct ib_device *ib_dev, 463 const char __user *buf, 464 int in_len, int out_len) 465 { 466 struct ib_uverbs_query_port cmd; 467 struct ib_uverbs_query_port_resp resp; 468 struct ib_port_attr attr; 469 int ret; 470 471 if (out_len < sizeof resp) 472 return -ENOSPC; 473 474 if (copy_from_user(&cmd, buf, sizeof cmd)) 475 return -EFAULT; 476 477 ret = ib_query_port(ib_dev, cmd.port_num, &attr); 478 if (ret) 479 return ret; 480 481 memset(&resp, 0, sizeof resp); 482 483 resp.state = attr.state; 484 resp.max_mtu = attr.max_mtu; 485 resp.active_mtu = attr.active_mtu; 486 resp.gid_tbl_len = attr.gid_tbl_len; 487 resp.port_cap_flags = attr.port_cap_flags; 488 resp.max_msg_sz = attr.max_msg_sz; 489 resp.bad_pkey_cntr = attr.bad_pkey_cntr; 490 resp.qkey_viol_cntr = attr.qkey_viol_cntr; 491 resp.pkey_tbl_len = attr.pkey_tbl_len; 492 resp.lid = attr.lid; 493 resp.sm_lid = attr.sm_lid; 494 resp.lmc = attr.lmc; 495 resp.max_vl_num = attr.max_vl_num; 496 resp.sm_sl = attr.sm_sl; 497 resp.subnet_timeout = attr.subnet_timeout; 498 resp.init_type_reply = attr.init_type_reply; 499 resp.active_width = attr.active_width; 500 resp.active_speed = attr.active_speed; 501 resp.phys_state = attr.phys_state; 502 resp.link_layer = rdma_port_get_link_layer(ib_dev, 503 cmd.port_num); 504 505 if (copy_to_user((void __user *) (unsigned long) cmd.response, 506 &resp, sizeof resp)) 507 return -EFAULT; 508 509 return in_len; 510 } 511 512 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file, 513 struct ib_device *ib_dev, 514 const char __user *buf, 515 int in_len, int out_len) 516 { 517 struct ib_uverbs_alloc_pd cmd; 518 struct ib_uverbs_alloc_pd_resp resp; 519 struct ib_udata udata; 520 struct ib_uobject *uobj; 521 struct ib_pd *pd; 522 int ret; 523 524 if (out_len < sizeof resp) 525 return -ENOSPC; 526 527 if (copy_from_user(&cmd, buf, sizeof cmd)) 528 return -EFAULT; 529 530 INIT_UDATA(&udata, buf + sizeof cmd, 531 (unsigned long) cmd.response + sizeof resp, 532 in_len - sizeof cmd, out_len - sizeof resp); 533 534 uobj = kmalloc(sizeof *uobj, GFP_KERNEL); 535 if (!uobj) 536 return -ENOMEM; 537 538 init_uobj(uobj, 0, file->ucontext, &pd_lock_class); 539 down_write(&uobj->mutex); 540 541 pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata); 542 if (IS_ERR(pd)) { 543 ret = PTR_ERR(pd); 544 goto err; 545 } 546 547 pd->device = ib_dev; 548 pd->uobject = uobj; 549 pd->local_mr = NULL; 550 atomic_set(&pd->usecnt, 0); 551 552 uobj->object = pd; 553 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj); 554 if (ret) 555 goto err_idr; 556 557 memset(&resp, 0, sizeof resp); 558 resp.pd_handle = uobj->id; 559 560 if (copy_to_user((void __user *) (unsigned long) cmd.response, 561 &resp, sizeof resp)) { 562 ret = -EFAULT; 563 goto err_copy; 564 } 565 566 mutex_lock(&file->mutex); 567 list_add_tail(&uobj->list, &file->ucontext->pd_list); 568 mutex_unlock(&file->mutex); 569 570 uobj->live = 1; 571 572 up_write(&uobj->mutex); 573 574 return in_len; 575 576 err_copy: 577 idr_remove_uobj(&ib_uverbs_pd_idr, uobj); 578 579 err_idr: 580 ib_dealloc_pd(pd); 581 582 err: 583 put_uobj_write(uobj); 584 return ret; 585 } 586 587 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file, 588 struct ib_device *ib_dev, 589 const char __user *buf, 590 int in_len, int out_len) 591 { 592 struct ib_uverbs_dealloc_pd cmd; 593 struct ib_uobject *uobj; 594 struct ib_pd *pd; 595 int ret; 596 597 if (copy_from_user(&cmd, buf, sizeof cmd)) 598 return -EFAULT; 599 600 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext); 601 if (!uobj) 602 return -EINVAL; 603 pd = uobj->object; 604 605 if (atomic_read(&pd->usecnt)) { 606 ret = -EBUSY; 607 goto err_put; 608 } 609 610 ret = pd->device->dealloc_pd(uobj->object); 611 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd"); 612 if (ret) 613 goto err_put; 614 615 uobj->live = 0; 616 put_uobj_write(uobj); 617 618 idr_remove_uobj(&ib_uverbs_pd_idr, uobj); 619 620 mutex_lock(&file->mutex); 621 list_del(&uobj->list); 622 mutex_unlock(&file->mutex); 623 624 put_uobj(uobj); 625 626 return in_len; 627 628 err_put: 629 put_uobj_write(uobj); 630 return ret; 631 } 632 633 struct xrcd_table_entry { 634 struct rb_node node; 635 struct ib_xrcd *xrcd; 636 struct inode *inode; 637 }; 638 639 static int xrcd_table_insert(struct ib_uverbs_device *dev, 640 struct inode *inode, 641 struct ib_xrcd *xrcd) 642 { 643 struct xrcd_table_entry *entry, *scan; 644 struct rb_node **p = &dev->xrcd_tree.rb_node; 645 struct rb_node *parent = NULL; 646 647 entry = kmalloc(sizeof *entry, GFP_KERNEL); 648 if (!entry) 649 return -ENOMEM; 650 651 entry->xrcd = xrcd; 652 entry->inode = inode; 653 654 while (*p) { 655 parent = *p; 656 scan = rb_entry(parent, struct xrcd_table_entry, node); 657 658 if (inode < scan->inode) { 659 p = &(*p)->rb_left; 660 } else if (inode > scan->inode) { 661 p = &(*p)->rb_right; 662 } else { 663 kfree(entry); 664 return -EEXIST; 665 } 666 } 667 668 rb_link_node(&entry->node, parent, p); 669 rb_insert_color(&entry->node, &dev->xrcd_tree); 670 igrab(inode); 671 return 0; 672 } 673 674 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, 675 struct inode *inode) 676 { 677 struct xrcd_table_entry *entry; 678 struct rb_node *p = dev->xrcd_tree.rb_node; 679 680 while (p) { 681 entry = rb_entry(p, struct xrcd_table_entry, node); 682 683 if (inode < entry->inode) 684 p = p->rb_left; 685 else if (inode > entry->inode) 686 p = p->rb_right; 687 else 688 return entry; 689 } 690 691 return NULL; 692 } 693 694 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) 695 { 696 struct xrcd_table_entry *entry; 697 698 entry = xrcd_table_search(dev, inode); 699 if (!entry) 700 return NULL; 701 702 return entry->xrcd; 703 } 704 705 static void xrcd_table_delete(struct ib_uverbs_device *dev, 706 struct inode *inode) 707 { 708 struct xrcd_table_entry *entry; 709 710 entry = xrcd_table_search(dev, inode); 711 if (entry) { 712 iput(inode); 713 rb_erase(&entry->node, &dev->xrcd_tree); 714 kfree(entry); 715 } 716 } 717 718 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file, 719 struct ib_device *ib_dev, 720 const char __user *buf, int in_len, 721 int out_len) 722 { 723 struct ib_uverbs_open_xrcd cmd; 724 struct ib_uverbs_open_xrcd_resp resp; 725 struct ib_udata udata; 726 struct ib_uxrcd_object *obj; 727 struct ib_xrcd *xrcd = NULL; 728 struct fd f = {NULL, 0}; 729 struct inode *inode = NULL; 730 int ret = 0; 731 int new_xrcd = 0; 732 733 if (out_len < sizeof resp) 734 return -ENOSPC; 735 736 if (copy_from_user(&cmd, buf, sizeof cmd)) 737 return -EFAULT; 738 739 INIT_UDATA(&udata, buf + sizeof cmd, 740 (unsigned long) cmd.response + sizeof resp, 741 in_len - sizeof cmd, out_len - sizeof resp); 742 743 mutex_lock(&file->device->xrcd_tree_mutex); 744 745 if (cmd.fd != -1) { 746 /* search for file descriptor */ 747 f = fdget(cmd.fd); 748 if (!f.file) { 749 ret = -EBADF; 750 goto err_tree_mutex_unlock; 751 } 752 753 inode = file_inode(f.file); 754 xrcd = find_xrcd(file->device, inode); 755 if (!xrcd && !(cmd.oflags & O_CREAT)) { 756 /* no file descriptor. Need CREATE flag */ 757 ret = -EAGAIN; 758 goto err_tree_mutex_unlock; 759 } 760 761 if (xrcd && cmd.oflags & O_EXCL) { 762 ret = -EINVAL; 763 goto err_tree_mutex_unlock; 764 } 765 } 766 767 obj = kmalloc(sizeof *obj, GFP_KERNEL); 768 if (!obj) { 769 ret = -ENOMEM; 770 goto err_tree_mutex_unlock; 771 } 772 773 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class); 774 775 down_write(&obj->uobject.mutex); 776 777 if (!xrcd) { 778 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata); 779 if (IS_ERR(xrcd)) { 780 ret = PTR_ERR(xrcd); 781 goto err; 782 } 783 784 xrcd->inode = inode; 785 xrcd->device = ib_dev; 786 atomic_set(&xrcd->usecnt, 0); 787 mutex_init(&xrcd->tgt_qp_mutex); 788 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 789 new_xrcd = 1; 790 } 791 792 atomic_set(&obj->refcnt, 0); 793 obj->uobject.object = xrcd; 794 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject); 795 if (ret) 796 goto err_idr; 797 798 memset(&resp, 0, sizeof resp); 799 resp.xrcd_handle = obj->uobject.id; 800 801 if (inode) { 802 if (new_xrcd) { 803 /* create new inode/xrcd table entry */ 804 ret = xrcd_table_insert(file->device, inode, xrcd); 805 if (ret) 806 goto err_insert_xrcd; 807 } 808 atomic_inc(&xrcd->usecnt); 809 } 810 811 if (copy_to_user((void __user *) (unsigned long) cmd.response, 812 &resp, sizeof resp)) { 813 ret = -EFAULT; 814 goto err_copy; 815 } 816 817 if (f.file) 818 fdput(f); 819 820 mutex_lock(&file->mutex); 821 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list); 822 mutex_unlock(&file->mutex); 823 824 obj->uobject.live = 1; 825 up_write(&obj->uobject.mutex); 826 827 mutex_unlock(&file->device->xrcd_tree_mutex); 828 return in_len; 829 830 err_copy: 831 if (inode) { 832 if (new_xrcd) 833 xrcd_table_delete(file->device, inode); 834 atomic_dec(&xrcd->usecnt); 835 } 836 837 err_insert_xrcd: 838 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject); 839 840 err_idr: 841 ib_dealloc_xrcd(xrcd); 842 843 err: 844 put_uobj_write(&obj->uobject); 845 846 err_tree_mutex_unlock: 847 if (f.file) 848 fdput(f); 849 850 mutex_unlock(&file->device->xrcd_tree_mutex); 851 852 return ret; 853 } 854 855 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file, 856 struct ib_device *ib_dev, 857 const char __user *buf, int in_len, 858 int out_len) 859 { 860 struct ib_uverbs_close_xrcd cmd; 861 struct ib_uobject *uobj; 862 struct ib_xrcd *xrcd = NULL; 863 struct inode *inode = NULL; 864 struct ib_uxrcd_object *obj; 865 int live; 866 int ret = 0; 867 868 if (copy_from_user(&cmd, buf, sizeof cmd)) 869 return -EFAULT; 870 871 mutex_lock(&file->device->xrcd_tree_mutex); 872 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext); 873 if (!uobj) { 874 ret = -EINVAL; 875 goto out; 876 } 877 878 xrcd = uobj->object; 879 inode = xrcd->inode; 880 obj = container_of(uobj, struct ib_uxrcd_object, uobject); 881 if (atomic_read(&obj->refcnt)) { 882 put_uobj_write(uobj); 883 ret = -EBUSY; 884 goto out; 885 } 886 887 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) { 888 ret = ib_dealloc_xrcd(uobj->object); 889 if (!ret) 890 uobj->live = 0; 891 } 892 893 live = uobj->live; 894 if (inode && ret) 895 atomic_inc(&xrcd->usecnt); 896 897 put_uobj_write(uobj); 898 899 if (ret) 900 goto out; 901 902 if (inode && !live) 903 xrcd_table_delete(file->device, inode); 904 905 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj); 906 mutex_lock(&file->mutex); 907 list_del(&uobj->list); 908 mutex_unlock(&file->mutex); 909 910 put_uobj(uobj); 911 ret = in_len; 912 913 out: 914 mutex_unlock(&file->device->xrcd_tree_mutex); 915 return ret; 916 } 917 918 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, 919 struct ib_xrcd *xrcd) 920 { 921 struct inode *inode; 922 923 inode = xrcd->inode; 924 if (inode && !atomic_dec_and_test(&xrcd->usecnt)) 925 return; 926 927 ib_dealloc_xrcd(xrcd); 928 929 if (inode) 930 xrcd_table_delete(dev, inode); 931 } 932 933 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, 934 struct ib_device *ib_dev, 935 const char __user *buf, int in_len, 936 int out_len) 937 { 938 struct ib_uverbs_reg_mr cmd; 939 struct ib_uverbs_reg_mr_resp resp; 940 struct ib_udata udata; 941 struct ib_uobject *uobj; 942 struct ib_pd *pd; 943 struct ib_mr *mr; 944 int ret; 945 946 if (out_len < sizeof resp) 947 return -ENOSPC; 948 949 if (copy_from_user(&cmd, buf, sizeof cmd)) 950 return -EFAULT; 951 952 INIT_UDATA(&udata, buf + sizeof cmd, 953 (unsigned long) cmd.response + sizeof resp, 954 in_len - sizeof cmd, out_len - sizeof resp); 955 956 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 957 return -EINVAL; 958 959 ret = ib_check_mr_access(cmd.access_flags); 960 if (ret) 961 return ret; 962 963 uobj = kmalloc(sizeof *uobj, GFP_KERNEL); 964 if (!uobj) 965 return -ENOMEM; 966 967 init_uobj(uobj, 0, file->ucontext, &mr_lock_class); 968 down_write(&uobj->mutex); 969 970 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 971 if (!pd) { 972 ret = -EINVAL; 973 goto err_free; 974 } 975 976 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) { 977 if (!(pd->device->attrs.device_cap_flags & 978 IB_DEVICE_ON_DEMAND_PAGING)) { 979 pr_debug("ODP support not available\n"); 980 ret = -EINVAL; 981 goto err_put; 982 } 983 } 984 985 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 986 cmd.access_flags, &udata); 987 if (IS_ERR(mr)) { 988 ret = PTR_ERR(mr); 989 goto err_put; 990 } 991 992 mr->device = pd->device; 993 mr->pd = pd; 994 mr->uobject = uobj; 995 atomic_inc(&pd->usecnt); 996 997 uobj->object = mr; 998 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj); 999 if (ret) 1000 goto err_unreg; 1001 1002 memset(&resp, 0, sizeof resp); 1003 resp.lkey = mr->lkey; 1004 resp.rkey = mr->rkey; 1005 resp.mr_handle = uobj->id; 1006 1007 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1008 &resp, sizeof resp)) { 1009 ret = -EFAULT; 1010 goto err_copy; 1011 } 1012 1013 put_pd_read(pd); 1014 1015 mutex_lock(&file->mutex); 1016 list_add_tail(&uobj->list, &file->ucontext->mr_list); 1017 mutex_unlock(&file->mutex); 1018 1019 uobj->live = 1; 1020 1021 up_write(&uobj->mutex); 1022 1023 return in_len; 1024 1025 err_copy: 1026 idr_remove_uobj(&ib_uverbs_mr_idr, uobj); 1027 1028 err_unreg: 1029 ib_dereg_mr(mr); 1030 1031 err_put: 1032 put_pd_read(pd); 1033 1034 err_free: 1035 put_uobj_write(uobj); 1036 return ret; 1037 } 1038 1039 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file, 1040 struct ib_device *ib_dev, 1041 const char __user *buf, int in_len, 1042 int out_len) 1043 { 1044 struct ib_uverbs_rereg_mr cmd; 1045 struct ib_uverbs_rereg_mr_resp resp; 1046 struct ib_udata udata; 1047 struct ib_pd *pd = NULL; 1048 struct ib_mr *mr; 1049 struct ib_pd *old_pd; 1050 int ret; 1051 struct ib_uobject *uobj; 1052 1053 if (out_len < sizeof(resp)) 1054 return -ENOSPC; 1055 1056 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1057 return -EFAULT; 1058 1059 INIT_UDATA(&udata, buf + sizeof(cmd), 1060 (unsigned long) cmd.response + sizeof(resp), 1061 in_len - sizeof(cmd), out_len - sizeof(resp)); 1062 1063 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) 1064 return -EINVAL; 1065 1066 if ((cmd.flags & IB_MR_REREG_TRANS) && 1067 (!cmd.start || !cmd.hca_va || 0 >= cmd.length || 1068 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) 1069 return -EINVAL; 1070 1071 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, 1072 file->ucontext); 1073 1074 if (!uobj) 1075 return -EINVAL; 1076 1077 mr = uobj->object; 1078 1079 if (cmd.flags & IB_MR_REREG_ACCESS) { 1080 ret = ib_check_mr_access(cmd.access_flags); 1081 if (ret) 1082 goto put_uobjs; 1083 } 1084 1085 if (cmd.flags & IB_MR_REREG_PD) { 1086 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 1087 if (!pd) { 1088 ret = -EINVAL; 1089 goto put_uobjs; 1090 } 1091 } 1092 1093 old_pd = mr->pd; 1094 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start, 1095 cmd.length, cmd.hca_va, 1096 cmd.access_flags, pd, &udata); 1097 if (!ret) { 1098 if (cmd.flags & IB_MR_REREG_PD) { 1099 atomic_inc(&pd->usecnt); 1100 mr->pd = pd; 1101 atomic_dec(&old_pd->usecnt); 1102 } 1103 } else { 1104 goto put_uobj_pd; 1105 } 1106 1107 memset(&resp, 0, sizeof(resp)); 1108 resp.lkey = mr->lkey; 1109 resp.rkey = mr->rkey; 1110 1111 if (copy_to_user((void __user *)(unsigned long)cmd.response, 1112 &resp, sizeof(resp))) 1113 ret = -EFAULT; 1114 else 1115 ret = in_len; 1116 1117 put_uobj_pd: 1118 if (cmd.flags & IB_MR_REREG_PD) 1119 put_pd_read(pd); 1120 1121 put_uobjs: 1122 1123 put_uobj_write(mr->uobject); 1124 1125 return ret; 1126 } 1127 1128 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file, 1129 struct ib_device *ib_dev, 1130 const char __user *buf, int in_len, 1131 int out_len) 1132 { 1133 struct ib_uverbs_dereg_mr cmd; 1134 struct ib_mr *mr; 1135 struct ib_uobject *uobj; 1136 int ret = -EINVAL; 1137 1138 if (copy_from_user(&cmd, buf, sizeof cmd)) 1139 return -EFAULT; 1140 1141 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext); 1142 if (!uobj) 1143 return -EINVAL; 1144 1145 mr = uobj->object; 1146 1147 ret = ib_dereg_mr(mr); 1148 if (!ret) 1149 uobj->live = 0; 1150 1151 put_uobj_write(uobj); 1152 1153 if (ret) 1154 return ret; 1155 1156 idr_remove_uobj(&ib_uverbs_mr_idr, uobj); 1157 1158 mutex_lock(&file->mutex); 1159 list_del(&uobj->list); 1160 mutex_unlock(&file->mutex); 1161 1162 put_uobj(uobj); 1163 1164 return in_len; 1165 } 1166 1167 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file, 1168 struct ib_device *ib_dev, 1169 const char __user *buf, int in_len, 1170 int out_len) 1171 { 1172 struct ib_uverbs_alloc_mw cmd; 1173 struct ib_uverbs_alloc_mw_resp resp; 1174 struct ib_uobject *uobj; 1175 struct ib_pd *pd; 1176 struct ib_mw *mw; 1177 int ret; 1178 1179 if (out_len < sizeof(resp)) 1180 return -ENOSPC; 1181 1182 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1183 return -EFAULT; 1184 1185 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); 1186 if (!uobj) 1187 return -ENOMEM; 1188 1189 init_uobj(uobj, 0, file->ucontext, &mw_lock_class); 1190 down_write(&uobj->mutex); 1191 1192 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 1193 if (!pd) { 1194 ret = -EINVAL; 1195 goto err_free; 1196 } 1197 1198 mw = pd->device->alloc_mw(pd, cmd.mw_type); 1199 if (IS_ERR(mw)) { 1200 ret = PTR_ERR(mw); 1201 goto err_put; 1202 } 1203 1204 mw->device = pd->device; 1205 mw->pd = pd; 1206 mw->uobject = uobj; 1207 atomic_inc(&pd->usecnt); 1208 1209 uobj->object = mw; 1210 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj); 1211 if (ret) 1212 goto err_unalloc; 1213 1214 memset(&resp, 0, sizeof(resp)); 1215 resp.rkey = mw->rkey; 1216 resp.mw_handle = uobj->id; 1217 1218 if (copy_to_user((void __user *)(unsigned long)cmd.response, 1219 &resp, sizeof(resp))) { 1220 ret = -EFAULT; 1221 goto err_copy; 1222 } 1223 1224 put_pd_read(pd); 1225 1226 mutex_lock(&file->mutex); 1227 list_add_tail(&uobj->list, &file->ucontext->mw_list); 1228 mutex_unlock(&file->mutex); 1229 1230 uobj->live = 1; 1231 1232 up_write(&uobj->mutex); 1233 1234 return in_len; 1235 1236 err_copy: 1237 idr_remove_uobj(&ib_uverbs_mw_idr, uobj); 1238 1239 err_unalloc: 1240 uverbs_dealloc_mw(mw); 1241 1242 err_put: 1243 put_pd_read(pd); 1244 1245 err_free: 1246 put_uobj_write(uobj); 1247 return ret; 1248 } 1249 1250 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file, 1251 struct ib_device *ib_dev, 1252 const char __user *buf, int in_len, 1253 int out_len) 1254 { 1255 struct ib_uverbs_dealloc_mw cmd; 1256 struct ib_mw *mw; 1257 struct ib_uobject *uobj; 1258 int ret = -EINVAL; 1259 1260 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1261 return -EFAULT; 1262 1263 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext); 1264 if (!uobj) 1265 return -EINVAL; 1266 1267 mw = uobj->object; 1268 1269 ret = uverbs_dealloc_mw(mw); 1270 if (!ret) 1271 uobj->live = 0; 1272 1273 put_uobj_write(uobj); 1274 1275 if (ret) 1276 return ret; 1277 1278 idr_remove_uobj(&ib_uverbs_mw_idr, uobj); 1279 1280 mutex_lock(&file->mutex); 1281 list_del(&uobj->list); 1282 mutex_unlock(&file->mutex); 1283 1284 put_uobj(uobj); 1285 1286 return in_len; 1287 } 1288 1289 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, 1290 struct ib_device *ib_dev, 1291 const char __user *buf, int in_len, 1292 int out_len) 1293 { 1294 struct ib_uverbs_create_comp_channel cmd; 1295 struct ib_uverbs_create_comp_channel_resp resp; 1296 struct file *filp; 1297 int ret; 1298 1299 if (out_len < sizeof resp) 1300 return -ENOSPC; 1301 1302 if (copy_from_user(&cmd, buf, sizeof cmd)) 1303 return -EFAULT; 1304 1305 ret = get_unused_fd_flags(O_CLOEXEC); 1306 if (ret < 0) 1307 return ret; 1308 resp.fd = ret; 1309 1310 filp = ib_uverbs_alloc_event_file(file, ib_dev, 0); 1311 if (IS_ERR(filp)) { 1312 put_unused_fd(resp.fd); 1313 return PTR_ERR(filp); 1314 } 1315 1316 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1317 &resp, sizeof resp)) { 1318 put_unused_fd(resp.fd); 1319 fput(filp); 1320 return -EFAULT; 1321 } 1322 1323 fd_install(resp.fd, filp); 1324 return in_len; 1325 } 1326 1327 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file, 1328 struct ib_device *ib_dev, 1329 struct ib_udata *ucore, 1330 struct ib_udata *uhw, 1331 struct ib_uverbs_ex_create_cq *cmd, 1332 size_t cmd_sz, 1333 int (*cb)(struct ib_uverbs_file *file, 1334 struct ib_ucq_object *obj, 1335 struct ib_uverbs_ex_create_cq_resp *resp, 1336 struct ib_udata *udata, 1337 void *context), 1338 void *context) 1339 { 1340 struct ib_ucq_object *obj; 1341 struct ib_uverbs_event_file *ev_file = NULL; 1342 struct ib_cq *cq; 1343 int ret; 1344 struct ib_uverbs_ex_create_cq_resp resp; 1345 struct ib_cq_init_attr attr = {}; 1346 1347 if (cmd->comp_vector >= file->device->num_comp_vectors) 1348 return ERR_PTR(-EINVAL); 1349 1350 obj = kmalloc(sizeof *obj, GFP_KERNEL); 1351 if (!obj) 1352 return ERR_PTR(-ENOMEM); 1353 1354 init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class); 1355 down_write(&obj->uobject.mutex); 1356 1357 if (cmd->comp_channel >= 0) { 1358 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel); 1359 if (!ev_file) { 1360 ret = -EINVAL; 1361 goto err; 1362 } 1363 } 1364 1365 obj->uverbs_file = file; 1366 obj->comp_events_reported = 0; 1367 obj->async_events_reported = 0; 1368 INIT_LIST_HEAD(&obj->comp_list); 1369 INIT_LIST_HEAD(&obj->async_list); 1370 1371 attr.cqe = cmd->cqe; 1372 attr.comp_vector = cmd->comp_vector; 1373 1374 if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags)) 1375 attr.flags = cmd->flags; 1376 1377 cq = ib_dev->create_cq(ib_dev, &attr, 1378 file->ucontext, uhw); 1379 if (IS_ERR(cq)) { 1380 ret = PTR_ERR(cq); 1381 goto err_file; 1382 } 1383 1384 cq->device = ib_dev; 1385 cq->uobject = &obj->uobject; 1386 cq->comp_handler = ib_uverbs_comp_handler; 1387 cq->event_handler = ib_uverbs_cq_event_handler; 1388 cq->cq_context = ev_file; 1389 atomic_set(&cq->usecnt, 0); 1390 1391 obj->uobject.object = cq; 1392 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject); 1393 if (ret) 1394 goto err_free; 1395 1396 memset(&resp, 0, sizeof resp); 1397 resp.base.cq_handle = obj->uobject.id; 1398 resp.base.cqe = cq->cqe; 1399 1400 resp.response_length = offsetof(typeof(resp), response_length) + 1401 sizeof(resp.response_length); 1402 1403 ret = cb(file, obj, &resp, ucore, context); 1404 if (ret) 1405 goto err_cb; 1406 1407 mutex_lock(&file->mutex); 1408 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list); 1409 mutex_unlock(&file->mutex); 1410 1411 obj->uobject.live = 1; 1412 1413 up_write(&obj->uobject.mutex); 1414 1415 return obj; 1416 1417 err_cb: 1418 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject); 1419 1420 err_free: 1421 ib_destroy_cq(cq); 1422 1423 err_file: 1424 if (ev_file) 1425 ib_uverbs_release_ucq(file, ev_file, obj); 1426 1427 err: 1428 put_uobj_write(&obj->uobject); 1429 1430 return ERR_PTR(ret); 1431 } 1432 1433 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file, 1434 struct ib_ucq_object *obj, 1435 struct ib_uverbs_ex_create_cq_resp *resp, 1436 struct ib_udata *ucore, void *context) 1437 { 1438 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base))) 1439 return -EFAULT; 1440 1441 return 0; 1442 } 1443 1444 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, 1445 struct ib_device *ib_dev, 1446 const char __user *buf, int in_len, 1447 int out_len) 1448 { 1449 struct ib_uverbs_create_cq cmd; 1450 struct ib_uverbs_ex_create_cq cmd_ex; 1451 struct ib_uverbs_create_cq_resp resp; 1452 struct ib_udata ucore; 1453 struct ib_udata uhw; 1454 struct ib_ucq_object *obj; 1455 1456 if (out_len < sizeof(resp)) 1457 return -ENOSPC; 1458 1459 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1460 return -EFAULT; 1461 1462 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), sizeof(resp)); 1463 1464 INIT_UDATA(&uhw, buf + sizeof(cmd), 1465 (unsigned long)cmd.response + sizeof(resp), 1466 in_len - sizeof(cmd), out_len - sizeof(resp)); 1467 1468 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1469 cmd_ex.user_handle = cmd.user_handle; 1470 cmd_ex.cqe = cmd.cqe; 1471 cmd_ex.comp_vector = cmd.comp_vector; 1472 cmd_ex.comp_channel = cmd.comp_channel; 1473 1474 obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex, 1475 offsetof(typeof(cmd_ex), comp_channel) + 1476 sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb, 1477 NULL); 1478 1479 if (IS_ERR(obj)) 1480 return PTR_ERR(obj); 1481 1482 return in_len; 1483 } 1484 1485 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file, 1486 struct ib_ucq_object *obj, 1487 struct ib_uverbs_ex_create_cq_resp *resp, 1488 struct ib_udata *ucore, void *context) 1489 { 1490 if (ib_copy_to_udata(ucore, resp, resp->response_length)) 1491 return -EFAULT; 1492 1493 return 0; 1494 } 1495 1496 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file, 1497 struct ib_device *ib_dev, 1498 struct ib_udata *ucore, 1499 struct ib_udata *uhw) 1500 { 1501 struct ib_uverbs_ex_create_cq_resp resp; 1502 struct ib_uverbs_ex_create_cq cmd; 1503 struct ib_ucq_object *obj; 1504 int err; 1505 1506 if (ucore->inlen < sizeof(cmd)) 1507 return -EINVAL; 1508 1509 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); 1510 if (err) 1511 return err; 1512 1513 if (cmd.comp_mask) 1514 return -EINVAL; 1515 1516 if (cmd.reserved) 1517 return -EINVAL; 1518 1519 if (ucore->outlen < (offsetof(typeof(resp), response_length) + 1520 sizeof(resp.response_length))) 1521 return -ENOSPC; 1522 1523 obj = create_cq(file, ib_dev, ucore, uhw, &cmd, 1524 min(ucore->inlen, sizeof(cmd)), 1525 ib_uverbs_ex_create_cq_cb, NULL); 1526 1527 if (IS_ERR(obj)) 1528 return PTR_ERR(obj); 1529 1530 return 0; 1531 } 1532 1533 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file, 1534 struct ib_device *ib_dev, 1535 const char __user *buf, int in_len, 1536 int out_len) 1537 { 1538 struct ib_uverbs_resize_cq cmd; 1539 struct ib_uverbs_resize_cq_resp resp; 1540 struct ib_udata udata; 1541 struct ib_cq *cq; 1542 int ret = -EINVAL; 1543 1544 if (copy_from_user(&cmd, buf, sizeof cmd)) 1545 return -EFAULT; 1546 1547 INIT_UDATA(&udata, buf + sizeof cmd, 1548 (unsigned long) cmd.response + sizeof resp, 1549 in_len - sizeof cmd, out_len - sizeof resp); 1550 1551 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); 1552 if (!cq) 1553 return -EINVAL; 1554 1555 ret = cq->device->resize_cq(cq, cmd.cqe, &udata); 1556 if (ret) 1557 goto out; 1558 1559 resp.cqe = cq->cqe; 1560 1561 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1562 &resp, sizeof resp.cqe)) 1563 ret = -EFAULT; 1564 1565 out: 1566 put_cq_read(cq); 1567 1568 return ret ? ret : in_len; 1569 } 1570 1571 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc) 1572 { 1573 struct ib_uverbs_wc tmp; 1574 1575 tmp.wr_id = wc->wr_id; 1576 tmp.status = wc->status; 1577 tmp.opcode = wc->opcode; 1578 tmp.vendor_err = wc->vendor_err; 1579 tmp.byte_len = wc->byte_len; 1580 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data; 1581 tmp.qp_num = wc->qp->qp_num; 1582 tmp.src_qp = wc->src_qp; 1583 tmp.wc_flags = wc->wc_flags; 1584 tmp.pkey_index = wc->pkey_index; 1585 tmp.slid = wc->slid; 1586 tmp.sl = wc->sl; 1587 tmp.dlid_path_bits = wc->dlid_path_bits; 1588 tmp.port_num = wc->port_num; 1589 tmp.reserved = 0; 1590 1591 if (copy_to_user(dest, &tmp, sizeof tmp)) 1592 return -EFAULT; 1593 1594 return 0; 1595 } 1596 1597 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file, 1598 struct ib_device *ib_dev, 1599 const char __user *buf, int in_len, 1600 int out_len) 1601 { 1602 struct ib_uverbs_poll_cq cmd; 1603 struct ib_uverbs_poll_cq_resp resp; 1604 u8 __user *header_ptr; 1605 u8 __user *data_ptr; 1606 struct ib_cq *cq; 1607 struct ib_wc wc; 1608 int ret; 1609 1610 if (copy_from_user(&cmd, buf, sizeof cmd)) 1611 return -EFAULT; 1612 1613 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); 1614 if (!cq) 1615 return -EINVAL; 1616 1617 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1618 header_ptr = (void __user *)(unsigned long) cmd.response; 1619 data_ptr = header_ptr + sizeof resp; 1620 1621 memset(&resp, 0, sizeof resp); 1622 while (resp.count < cmd.ne) { 1623 ret = ib_poll_cq(cq, 1, &wc); 1624 if (ret < 0) 1625 goto out_put; 1626 if (!ret) 1627 break; 1628 1629 ret = copy_wc_to_user(data_ptr, &wc); 1630 if (ret) 1631 goto out_put; 1632 1633 data_ptr += sizeof(struct ib_uverbs_wc); 1634 ++resp.count; 1635 } 1636 1637 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1638 ret = -EFAULT; 1639 goto out_put; 1640 } 1641 1642 ret = in_len; 1643 1644 out_put: 1645 put_cq_read(cq); 1646 return ret; 1647 } 1648 1649 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file, 1650 struct ib_device *ib_dev, 1651 const char __user *buf, int in_len, 1652 int out_len) 1653 { 1654 struct ib_uverbs_req_notify_cq cmd; 1655 struct ib_cq *cq; 1656 1657 if (copy_from_user(&cmd, buf, sizeof cmd)) 1658 return -EFAULT; 1659 1660 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); 1661 if (!cq) 1662 return -EINVAL; 1663 1664 ib_req_notify_cq(cq, cmd.solicited_only ? 1665 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1666 1667 put_cq_read(cq); 1668 1669 return in_len; 1670 } 1671 1672 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file, 1673 struct ib_device *ib_dev, 1674 const char __user *buf, int in_len, 1675 int out_len) 1676 { 1677 struct ib_uverbs_destroy_cq cmd; 1678 struct ib_uverbs_destroy_cq_resp resp; 1679 struct ib_uobject *uobj; 1680 struct ib_cq *cq; 1681 struct ib_ucq_object *obj; 1682 struct ib_uverbs_event_file *ev_file; 1683 int ret = -EINVAL; 1684 1685 if (copy_from_user(&cmd, buf, sizeof cmd)) 1686 return -EFAULT; 1687 1688 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext); 1689 if (!uobj) 1690 return -EINVAL; 1691 cq = uobj->object; 1692 ev_file = cq->cq_context; 1693 obj = container_of(cq->uobject, struct ib_ucq_object, uobject); 1694 1695 ret = ib_destroy_cq(cq); 1696 if (!ret) 1697 uobj->live = 0; 1698 1699 put_uobj_write(uobj); 1700 1701 if (ret) 1702 return ret; 1703 1704 idr_remove_uobj(&ib_uverbs_cq_idr, uobj); 1705 1706 mutex_lock(&file->mutex); 1707 list_del(&uobj->list); 1708 mutex_unlock(&file->mutex); 1709 1710 ib_uverbs_release_ucq(file, ev_file, obj); 1711 1712 memset(&resp, 0, sizeof resp); 1713 resp.comp_events_reported = obj->comp_events_reported; 1714 resp.async_events_reported = obj->async_events_reported; 1715 1716 put_uobj(uobj); 1717 1718 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1719 &resp, sizeof resp)) 1720 return -EFAULT; 1721 1722 return in_len; 1723 } 1724 1725 static int create_qp(struct ib_uverbs_file *file, 1726 struct ib_udata *ucore, 1727 struct ib_udata *uhw, 1728 struct ib_uverbs_ex_create_qp *cmd, 1729 size_t cmd_sz, 1730 int (*cb)(struct ib_uverbs_file *file, 1731 struct ib_uverbs_ex_create_qp_resp *resp, 1732 struct ib_udata *udata), 1733 void *context) 1734 { 1735 struct ib_uqp_object *obj; 1736 struct ib_device *device; 1737 struct ib_pd *pd = NULL; 1738 struct ib_xrcd *xrcd = NULL; 1739 struct ib_uobject *uninitialized_var(xrcd_uobj); 1740 struct ib_cq *scq = NULL, *rcq = NULL; 1741 struct ib_srq *srq = NULL; 1742 struct ib_qp *qp; 1743 char *buf; 1744 struct ib_qp_init_attr attr; 1745 struct ib_uverbs_ex_create_qp_resp resp; 1746 int ret; 1747 1748 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW)) 1749 return -EPERM; 1750 1751 obj = kzalloc(sizeof *obj, GFP_KERNEL); 1752 if (!obj) 1753 return -ENOMEM; 1754 1755 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, 1756 &qp_lock_class); 1757 down_write(&obj->uevent.uobject.mutex); 1758 1759 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1760 xrcd = idr_read_xrcd(cmd->pd_handle, file->ucontext, 1761 &xrcd_uobj); 1762 if (!xrcd) { 1763 ret = -EINVAL; 1764 goto err_put; 1765 } 1766 device = xrcd->device; 1767 } else { 1768 if (cmd->qp_type == IB_QPT_XRC_INI) { 1769 cmd->max_recv_wr = 0; 1770 cmd->max_recv_sge = 0; 1771 } else { 1772 if (cmd->is_srq) { 1773 srq = idr_read_srq(cmd->srq_handle, 1774 file->ucontext); 1775 if (!srq || srq->srq_type != IB_SRQT_BASIC) { 1776 ret = -EINVAL; 1777 goto err_put; 1778 } 1779 } 1780 1781 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1782 rcq = idr_read_cq(cmd->recv_cq_handle, 1783 file->ucontext, 0); 1784 if (!rcq) { 1785 ret = -EINVAL; 1786 goto err_put; 1787 } 1788 } 1789 } 1790 1791 scq = idr_read_cq(cmd->send_cq_handle, file->ucontext, !!rcq); 1792 rcq = rcq ?: scq; 1793 pd = idr_read_pd(cmd->pd_handle, file->ucontext); 1794 if (!pd || !scq) { 1795 ret = -EINVAL; 1796 goto err_put; 1797 } 1798 1799 device = pd->device; 1800 } 1801 1802 attr.event_handler = ib_uverbs_qp_event_handler; 1803 attr.qp_context = file; 1804 attr.send_cq = scq; 1805 attr.recv_cq = rcq; 1806 attr.srq = srq; 1807 attr.xrcd = xrcd; 1808 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1809 IB_SIGNAL_REQ_WR; 1810 attr.qp_type = cmd->qp_type; 1811 attr.create_flags = 0; 1812 1813 attr.cap.max_send_wr = cmd->max_send_wr; 1814 attr.cap.max_recv_wr = cmd->max_recv_wr; 1815 attr.cap.max_send_sge = cmd->max_send_sge; 1816 attr.cap.max_recv_sge = cmd->max_recv_sge; 1817 attr.cap.max_inline_data = cmd->max_inline_data; 1818 1819 obj->uevent.events_reported = 0; 1820 INIT_LIST_HEAD(&obj->uevent.event_list); 1821 INIT_LIST_HEAD(&obj->mcast_list); 1822 1823 if (cmd_sz >= offsetof(typeof(*cmd), create_flags) + 1824 sizeof(cmd->create_flags)) 1825 attr.create_flags = cmd->create_flags; 1826 1827 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1828 IB_QP_CREATE_CROSS_CHANNEL | 1829 IB_QP_CREATE_MANAGED_SEND | 1830 IB_QP_CREATE_MANAGED_RECV)) { 1831 ret = -EINVAL; 1832 goto err_put; 1833 } 1834 1835 buf = (void *)cmd + sizeof(*cmd); 1836 if (cmd_sz > sizeof(*cmd)) 1837 if (!(buf[0] == 0 && !memcmp(buf, buf + 1, 1838 cmd_sz - sizeof(*cmd) - 1))) { 1839 ret = -EINVAL; 1840 goto err_put; 1841 } 1842 1843 if (cmd->qp_type == IB_QPT_XRC_TGT) 1844 qp = ib_create_qp(pd, &attr); 1845 else 1846 qp = device->create_qp(pd, &attr, uhw); 1847 1848 if (IS_ERR(qp)) { 1849 ret = PTR_ERR(qp); 1850 goto err_put; 1851 } 1852 1853 if (cmd->qp_type != IB_QPT_XRC_TGT) { 1854 qp->real_qp = qp; 1855 qp->device = device; 1856 qp->pd = pd; 1857 qp->send_cq = attr.send_cq; 1858 qp->recv_cq = attr.recv_cq; 1859 qp->srq = attr.srq; 1860 qp->event_handler = attr.event_handler; 1861 qp->qp_context = attr.qp_context; 1862 qp->qp_type = attr.qp_type; 1863 atomic_set(&qp->usecnt, 0); 1864 atomic_inc(&pd->usecnt); 1865 atomic_inc(&attr.send_cq->usecnt); 1866 if (attr.recv_cq) 1867 atomic_inc(&attr.recv_cq->usecnt); 1868 if (attr.srq) 1869 atomic_inc(&attr.srq->usecnt); 1870 } 1871 qp->uobject = &obj->uevent.uobject; 1872 1873 obj->uevent.uobject.object = qp; 1874 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 1875 if (ret) 1876 goto err_destroy; 1877 1878 memset(&resp, 0, sizeof resp); 1879 resp.base.qpn = qp->qp_num; 1880 resp.base.qp_handle = obj->uevent.uobject.id; 1881 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1882 resp.base.max_send_sge = attr.cap.max_send_sge; 1883 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1884 resp.base.max_send_wr = attr.cap.max_send_wr; 1885 resp.base.max_inline_data = attr.cap.max_inline_data; 1886 1887 resp.response_length = offsetof(typeof(resp), response_length) + 1888 sizeof(resp.response_length); 1889 1890 ret = cb(file, &resp, ucore); 1891 if (ret) 1892 goto err_cb; 1893 1894 if (xrcd) { 1895 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1896 uobject); 1897 atomic_inc(&obj->uxrcd->refcnt); 1898 put_xrcd_read(xrcd_uobj); 1899 } 1900 1901 if (pd) 1902 put_pd_read(pd); 1903 if (scq) 1904 put_cq_read(scq); 1905 if (rcq && rcq != scq) 1906 put_cq_read(rcq); 1907 if (srq) 1908 put_srq_read(srq); 1909 1910 mutex_lock(&file->mutex); 1911 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); 1912 mutex_unlock(&file->mutex); 1913 1914 obj->uevent.uobject.live = 1; 1915 1916 up_write(&obj->uevent.uobject.mutex); 1917 1918 return 0; 1919 err_cb: 1920 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 1921 1922 err_destroy: 1923 ib_destroy_qp(qp); 1924 1925 err_put: 1926 if (xrcd) 1927 put_xrcd_read(xrcd_uobj); 1928 if (pd) 1929 put_pd_read(pd); 1930 if (scq) 1931 put_cq_read(scq); 1932 if (rcq && rcq != scq) 1933 put_cq_read(rcq); 1934 if (srq) 1935 put_srq_read(srq); 1936 1937 put_uobj_write(&obj->uevent.uobject); 1938 return ret; 1939 } 1940 1941 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file, 1942 struct ib_uverbs_ex_create_qp_resp *resp, 1943 struct ib_udata *ucore) 1944 { 1945 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base))) 1946 return -EFAULT; 1947 1948 return 0; 1949 } 1950 1951 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file, 1952 struct ib_device *ib_dev, 1953 const char __user *buf, int in_len, 1954 int out_len) 1955 { 1956 struct ib_uverbs_create_qp cmd; 1957 struct ib_uverbs_ex_create_qp cmd_ex; 1958 struct ib_udata ucore; 1959 struct ib_udata uhw; 1960 ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp); 1961 int err; 1962 1963 if (out_len < resp_size) 1964 return -ENOSPC; 1965 1966 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1967 return -EFAULT; 1968 1969 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), 1970 resp_size); 1971 INIT_UDATA(&uhw, buf + sizeof(cmd), 1972 (unsigned long)cmd.response + resp_size, 1973 in_len - sizeof(cmd), out_len - resp_size); 1974 1975 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1976 cmd_ex.user_handle = cmd.user_handle; 1977 cmd_ex.pd_handle = cmd.pd_handle; 1978 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1979 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1980 cmd_ex.srq_handle = cmd.srq_handle; 1981 cmd_ex.max_send_wr = cmd.max_send_wr; 1982 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1983 cmd_ex.max_send_sge = cmd.max_send_sge; 1984 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1985 cmd_ex.max_inline_data = cmd.max_inline_data; 1986 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1987 cmd_ex.qp_type = cmd.qp_type; 1988 cmd_ex.is_srq = cmd.is_srq; 1989 1990 err = create_qp(file, &ucore, &uhw, &cmd_ex, 1991 offsetof(typeof(cmd_ex), is_srq) + 1992 sizeof(cmd.is_srq), ib_uverbs_create_qp_cb, 1993 NULL); 1994 1995 if (err) 1996 return err; 1997 1998 return in_len; 1999 } 2000 2001 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file, 2002 struct ib_uverbs_ex_create_qp_resp *resp, 2003 struct ib_udata *ucore) 2004 { 2005 if (ib_copy_to_udata(ucore, resp, resp->response_length)) 2006 return -EFAULT; 2007 2008 return 0; 2009 } 2010 2011 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file, 2012 struct ib_device *ib_dev, 2013 struct ib_udata *ucore, 2014 struct ib_udata *uhw) 2015 { 2016 struct ib_uverbs_ex_create_qp_resp resp; 2017 struct ib_uverbs_ex_create_qp cmd = {0}; 2018 int err; 2019 2020 if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) + 2021 sizeof(cmd.comp_mask))) 2022 return -EINVAL; 2023 2024 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen)); 2025 if (err) 2026 return err; 2027 2028 if (cmd.comp_mask) 2029 return -EINVAL; 2030 2031 if (cmd.reserved) 2032 return -EINVAL; 2033 2034 if (ucore->outlen < (offsetof(typeof(resp), response_length) + 2035 sizeof(resp.response_length))) 2036 return -ENOSPC; 2037 2038 err = create_qp(file, ucore, uhw, &cmd, 2039 min(ucore->inlen, sizeof(cmd)), 2040 ib_uverbs_ex_create_qp_cb, NULL); 2041 2042 if (err) 2043 return err; 2044 2045 return 0; 2046 } 2047 2048 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file, 2049 struct ib_device *ib_dev, 2050 const char __user *buf, int in_len, int out_len) 2051 { 2052 struct ib_uverbs_open_qp cmd; 2053 struct ib_uverbs_create_qp_resp resp; 2054 struct ib_udata udata; 2055 struct ib_uqp_object *obj; 2056 struct ib_xrcd *xrcd; 2057 struct ib_uobject *uninitialized_var(xrcd_uobj); 2058 struct ib_qp *qp; 2059 struct ib_qp_open_attr attr; 2060 int ret; 2061 2062 if (out_len < sizeof resp) 2063 return -ENOSPC; 2064 2065 if (copy_from_user(&cmd, buf, sizeof cmd)) 2066 return -EFAULT; 2067 2068 INIT_UDATA(&udata, buf + sizeof cmd, 2069 (unsigned long) cmd.response + sizeof resp, 2070 in_len - sizeof cmd, out_len - sizeof resp); 2071 2072 obj = kmalloc(sizeof *obj, GFP_KERNEL); 2073 if (!obj) 2074 return -ENOMEM; 2075 2076 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class); 2077 down_write(&obj->uevent.uobject.mutex); 2078 2079 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj); 2080 if (!xrcd) { 2081 ret = -EINVAL; 2082 goto err_put; 2083 } 2084 2085 attr.event_handler = ib_uverbs_qp_event_handler; 2086 attr.qp_context = file; 2087 attr.qp_num = cmd.qpn; 2088 attr.qp_type = cmd.qp_type; 2089 2090 obj->uevent.events_reported = 0; 2091 INIT_LIST_HEAD(&obj->uevent.event_list); 2092 INIT_LIST_HEAD(&obj->mcast_list); 2093 2094 qp = ib_open_qp(xrcd, &attr); 2095 if (IS_ERR(qp)) { 2096 ret = PTR_ERR(qp); 2097 goto err_put; 2098 } 2099 2100 qp->uobject = &obj->uevent.uobject; 2101 2102 obj->uevent.uobject.object = qp; 2103 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 2104 if (ret) 2105 goto err_destroy; 2106 2107 memset(&resp, 0, sizeof resp); 2108 resp.qpn = qp->qp_num; 2109 resp.qp_handle = obj->uevent.uobject.id; 2110 2111 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2112 &resp, sizeof resp)) { 2113 ret = -EFAULT; 2114 goto err_remove; 2115 } 2116 2117 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 2118 atomic_inc(&obj->uxrcd->refcnt); 2119 put_xrcd_read(xrcd_uobj); 2120 2121 mutex_lock(&file->mutex); 2122 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); 2123 mutex_unlock(&file->mutex); 2124 2125 obj->uevent.uobject.live = 1; 2126 2127 up_write(&obj->uevent.uobject.mutex); 2128 2129 return in_len; 2130 2131 err_remove: 2132 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 2133 2134 err_destroy: 2135 ib_destroy_qp(qp); 2136 2137 err_put: 2138 put_xrcd_read(xrcd_uobj); 2139 put_uobj_write(&obj->uevent.uobject); 2140 return ret; 2141 } 2142 2143 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file, 2144 struct ib_device *ib_dev, 2145 const char __user *buf, int in_len, 2146 int out_len) 2147 { 2148 struct ib_uverbs_query_qp cmd; 2149 struct ib_uverbs_query_qp_resp resp; 2150 struct ib_qp *qp; 2151 struct ib_qp_attr *attr; 2152 struct ib_qp_init_attr *init_attr; 2153 int ret; 2154 2155 if (copy_from_user(&cmd, buf, sizeof cmd)) 2156 return -EFAULT; 2157 2158 attr = kmalloc(sizeof *attr, GFP_KERNEL); 2159 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 2160 if (!attr || !init_attr) { 2161 ret = -ENOMEM; 2162 goto out; 2163 } 2164 2165 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 2166 if (!qp) { 2167 ret = -EINVAL; 2168 goto out; 2169 } 2170 2171 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 2172 2173 put_qp_read(qp); 2174 2175 if (ret) 2176 goto out; 2177 2178 memset(&resp, 0, sizeof resp); 2179 2180 resp.qp_state = attr->qp_state; 2181 resp.cur_qp_state = attr->cur_qp_state; 2182 resp.path_mtu = attr->path_mtu; 2183 resp.path_mig_state = attr->path_mig_state; 2184 resp.qkey = attr->qkey; 2185 resp.rq_psn = attr->rq_psn; 2186 resp.sq_psn = attr->sq_psn; 2187 resp.dest_qp_num = attr->dest_qp_num; 2188 resp.qp_access_flags = attr->qp_access_flags; 2189 resp.pkey_index = attr->pkey_index; 2190 resp.alt_pkey_index = attr->alt_pkey_index; 2191 resp.sq_draining = attr->sq_draining; 2192 resp.max_rd_atomic = attr->max_rd_atomic; 2193 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 2194 resp.min_rnr_timer = attr->min_rnr_timer; 2195 resp.port_num = attr->port_num; 2196 resp.timeout = attr->timeout; 2197 resp.retry_cnt = attr->retry_cnt; 2198 resp.rnr_retry = attr->rnr_retry; 2199 resp.alt_port_num = attr->alt_port_num; 2200 resp.alt_timeout = attr->alt_timeout; 2201 2202 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16); 2203 resp.dest.flow_label = attr->ah_attr.grh.flow_label; 2204 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index; 2205 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit; 2206 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class; 2207 resp.dest.dlid = attr->ah_attr.dlid; 2208 resp.dest.sl = attr->ah_attr.sl; 2209 resp.dest.src_path_bits = attr->ah_attr.src_path_bits; 2210 resp.dest.static_rate = attr->ah_attr.static_rate; 2211 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH); 2212 resp.dest.port_num = attr->ah_attr.port_num; 2213 2214 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16); 2215 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label; 2216 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index; 2217 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit; 2218 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class; 2219 resp.alt_dest.dlid = attr->alt_ah_attr.dlid; 2220 resp.alt_dest.sl = attr->alt_ah_attr.sl; 2221 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits; 2222 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate; 2223 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH); 2224 resp.alt_dest.port_num = attr->alt_ah_attr.port_num; 2225 2226 resp.max_send_wr = init_attr->cap.max_send_wr; 2227 resp.max_recv_wr = init_attr->cap.max_recv_wr; 2228 resp.max_send_sge = init_attr->cap.max_send_sge; 2229 resp.max_recv_sge = init_attr->cap.max_recv_sge; 2230 resp.max_inline_data = init_attr->cap.max_inline_data; 2231 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 2232 2233 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2234 &resp, sizeof resp)) 2235 ret = -EFAULT; 2236 2237 out: 2238 kfree(attr); 2239 kfree(init_attr); 2240 2241 return ret ? ret : in_len; 2242 } 2243 2244 /* Remove ignored fields set in the attribute mask */ 2245 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 2246 { 2247 switch (qp_type) { 2248 case IB_QPT_XRC_INI: 2249 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 2250 case IB_QPT_XRC_TGT: 2251 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 2252 IB_QP_RNR_RETRY); 2253 default: 2254 return mask; 2255 } 2256 } 2257 2258 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file, 2259 struct ib_device *ib_dev, 2260 const char __user *buf, int in_len, 2261 int out_len) 2262 { 2263 struct ib_uverbs_modify_qp cmd; 2264 struct ib_udata udata; 2265 struct ib_qp *qp; 2266 struct ib_qp_attr *attr; 2267 int ret; 2268 2269 if (copy_from_user(&cmd, buf, sizeof cmd)) 2270 return -EFAULT; 2271 2272 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, 2273 out_len); 2274 2275 attr = kmalloc(sizeof *attr, GFP_KERNEL); 2276 if (!attr) 2277 return -ENOMEM; 2278 2279 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 2280 if (!qp) { 2281 ret = -EINVAL; 2282 goto out; 2283 } 2284 2285 attr->qp_state = cmd.qp_state; 2286 attr->cur_qp_state = cmd.cur_qp_state; 2287 attr->path_mtu = cmd.path_mtu; 2288 attr->path_mig_state = cmd.path_mig_state; 2289 attr->qkey = cmd.qkey; 2290 attr->rq_psn = cmd.rq_psn; 2291 attr->sq_psn = cmd.sq_psn; 2292 attr->dest_qp_num = cmd.dest_qp_num; 2293 attr->qp_access_flags = cmd.qp_access_flags; 2294 attr->pkey_index = cmd.pkey_index; 2295 attr->alt_pkey_index = cmd.alt_pkey_index; 2296 attr->en_sqd_async_notify = cmd.en_sqd_async_notify; 2297 attr->max_rd_atomic = cmd.max_rd_atomic; 2298 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic; 2299 attr->min_rnr_timer = cmd.min_rnr_timer; 2300 attr->port_num = cmd.port_num; 2301 attr->timeout = cmd.timeout; 2302 attr->retry_cnt = cmd.retry_cnt; 2303 attr->rnr_retry = cmd.rnr_retry; 2304 attr->alt_port_num = cmd.alt_port_num; 2305 attr->alt_timeout = cmd.alt_timeout; 2306 2307 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16); 2308 attr->ah_attr.grh.flow_label = cmd.dest.flow_label; 2309 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index; 2310 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit; 2311 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class; 2312 attr->ah_attr.dlid = cmd.dest.dlid; 2313 attr->ah_attr.sl = cmd.dest.sl; 2314 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits; 2315 attr->ah_attr.static_rate = cmd.dest.static_rate; 2316 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0; 2317 attr->ah_attr.port_num = cmd.dest.port_num; 2318 2319 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16); 2320 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label; 2321 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index; 2322 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit; 2323 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class; 2324 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid; 2325 attr->alt_ah_attr.sl = cmd.alt_dest.sl; 2326 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits; 2327 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate; 2328 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0; 2329 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num; 2330 2331 if (qp->real_qp == qp) { 2332 ret = ib_resolve_eth_dmac(qp, attr, &cmd.attr_mask); 2333 if (ret) 2334 goto release_qp; 2335 ret = qp->device->modify_qp(qp, attr, 2336 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata); 2337 } else { 2338 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask)); 2339 } 2340 2341 if (ret) 2342 goto release_qp; 2343 2344 ret = in_len; 2345 2346 release_qp: 2347 put_qp_read(qp); 2348 2349 out: 2350 kfree(attr); 2351 2352 return ret; 2353 } 2354 2355 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file, 2356 struct ib_device *ib_dev, 2357 const char __user *buf, int in_len, 2358 int out_len) 2359 { 2360 struct ib_uverbs_destroy_qp cmd; 2361 struct ib_uverbs_destroy_qp_resp resp; 2362 struct ib_uobject *uobj; 2363 struct ib_qp *qp; 2364 struct ib_uqp_object *obj; 2365 int ret = -EINVAL; 2366 2367 if (copy_from_user(&cmd, buf, sizeof cmd)) 2368 return -EFAULT; 2369 2370 memset(&resp, 0, sizeof resp); 2371 2372 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext); 2373 if (!uobj) 2374 return -EINVAL; 2375 qp = uobj->object; 2376 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 2377 2378 if (!list_empty(&obj->mcast_list)) { 2379 put_uobj_write(uobj); 2380 return -EBUSY; 2381 } 2382 2383 ret = ib_destroy_qp(qp); 2384 if (!ret) 2385 uobj->live = 0; 2386 2387 put_uobj_write(uobj); 2388 2389 if (ret) 2390 return ret; 2391 2392 if (obj->uxrcd) 2393 atomic_dec(&obj->uxrcd->refcnt); 2394 2395 idr_remove_uobj(&ib_uverbs_qp_idr, uobj); 2396 2397 mutex_lock(&file->mutex); 2398 list_del(&uobj->list); 2399 mutex_unlock(&file->mutex); 2400 2401 ib_uverbs_release_uevent(file, &obj->uevent); 2402 2403 resp.events_reported = obj->uevent.events_reported; 2404 2405 put_uobj(uobj); 2406 2407 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2408 &resp, sizeof resp)) 2409 return -EFAULT; 2410 2411 return in_len; 2412 } 2413 2414 static void *alloc_wr(size_t wr_size, __u32 num_sge) 2415 { 2416 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) + 2417 num_sge * sizeof (struct ib_sge), GFP_KERNEL); 2418 }; 2419 2420 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, 2421 struct ib_device *ib_dev, 2422 const char __user *buf, int in_len, 2423 int out_len) 2424 { 2425 struct ib_uverbs_post_send cmd; 2426 struct ib_uverbs_post_send_resp resp; 2427 struct ib_uverbs_send_wr *user_wr; 2428 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr; 2429 struct ib_qp *qp; 2430 int i, sg_ind; 2431 int is_ud; 2432 ssize_t ret = -EINVAL; 2433 size_t next_size; 2434 2435 if (copy_from_user(&cmd, buf, sizeof cmd)) 2436 return -EFAULT; 2437 2438 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count + 2439 cmd.sge_count * sizeof (struct ib_uverbs_sge)) 2440 return -EINVAL; 2441 2442 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr)) 2443 return -EINVAL; 2444 2445 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2446 if (!user_wr) 2447 return -ENOMEM; 2448 2449 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 2450 if (!qp) 2451 goto out; 2452 2453 is_ud = qp->qp_type == IB_QPT_UD; 2454 sg_ind = 0; 2455 last = NULL; 2456 for (i = 0; i < cmd.wr_count; ++i) { 2457 if (copy_from_user(user_wr, 2458 buf + sizeof cmd + i * cmd.wqe_size, 2459 cmd.wqe_size)) { 2460 ret = -EFAULT; 2461 goto out_put; 2462 } 2463 2464 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2465 ret = -EINVAL; 2466 goto out_put; 2467 } 2468 2469 if (is_ud) { 2470 struct ib_ud_wr *ud; 2471 2472 if (user_wr->opcode != IB_WR_SEND && 2473 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2474 ret = -EINVAL; 2475 goto out_put; 2476 } 2477 2478 next_size = sizeof(*ud); 2479 ud = alloc_wr(next_size, user_wr->num_sge); 2480 if (!ud) { 2481 ret = -ENOMEM; 2482 goto out_put; 2483 } 2484 2485 ud->ah = idr_read_ah(user_wr->wr.ud.ah, file->ucontext); 2486 if (!ud->ah) { 2487 kfree(ud); 2488 ret = -EINVAL; 2489 goto out_put; 2490 } 2491 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2492 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2493 2494 next = &ud->wr; 2495 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2496 user_wr->opcode == IB_WR_RDMA_WRITE || 2497 user_wr->opcode == IB_WR_RDMA_READ) { 2498 struct ib_rdma_wr *rdma; 2499 2500 next_size = sizeof(*rdma); 2501 rdma = alloc_wr(next_size, user_wr->num_sge); 2502 if (!rdma) { 2503 ret = -ENOMEM; 2504 goto out_put; 2505 } 2506 2507 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2508 rdma->rkey = user_wr->wr.rdma.rkey; 2509 2510 next = &rdma->wr; 2511 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2512 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2513 struct ib_atomic_wr *atomic; 2514 2515 next_size = sizeof(*atomic); 2516 atomic = alloc_wr(next_size, user_wr->num_sge); 2517 if (!atomic) { 2518 ret = -ENOMEM; 2519 goto out_put; 2520 } 2521 2522 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2523 atomic->compare_add = user_wr->wr.atomic.compare_add; 2524 atomic->swap = user_wr->wr.atomic.swap; 2525 atomic->rkey = user_wr->wr.atomic.rkey; 2526 2527 next = &atomic->wr; 2528 } else if (user_wr->opcode == IB_WR_SEND || 2529 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2530 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2531 next_size = sizeof(*next); 2532 next = alloc_wr(next_size, user_wr->num_sge); 2533 if (!next) { 2534 ret = -ENOMEM; 2535 goto out_put; 2536 } 2537 } else { 2538 ret = -EINVAL; 2539 goto out_put; 2540 } 2541 2542 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2543 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2544 next->ex.imm_data = 2545 (__be32 __force) user_wr->ex.imm_data; 2546 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2547 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2548 } 2549 2550 if (!last) 2551 wr = next; 2552 else 2553 last->next = next; 2554 last = next; 2555 2556 next->next = NULL; 2557 next->wr_id = user_wr->wr_id; 2558 next->num_sge = user_wr->num_sge; 2559 next->opcode = user_wr->opcode; 2560 next->send_flags = user_wr->send_flags; 2561 2562 if (next->num_sge) { 2563 next->sg_list = (void *) next + 2564 ALIGN(next_size, sizeof(struct ib_sge)); 2565 if (copy_from_user(next->sg_list, 2566 buf + sizeof cmd + 2567 cmd.wr_count * cmd.wqe_size + 2568 sg_ind * sizeof (struct ib_sge), 2569 next->num_sge * sizeof (struct ib_sge))) { 2570 ret = -EFAULT; 2571 goto out_put; 2572 } 2573 sg_ind += next->num_sge; 2574 } else 2575 next->sg_list = NULL; 2576 } 2577 2578 resp.bad_wr = 0; 2579 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr); 2580 if (ret) 2581 for (next = wr; next; next = next->next) { 2582 ++resp.bad_wr; 2583 if (next == bad_wr) 2584 break; 2585 } 2586 2587 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2588 &resp, sizeof resp)) 2589 ret = -EFAULT; 2590 2591 out_put: 2592 put_qp_read(qp); 2593 2594 while (wr) { 2595 if (is_ud && ud_wr(wr)->ah) 2596 put_ah_read(ud_wr(wr)->ah); 2597 next = wr->next; 2598 kfree(wr); 2599 wr = next; 2600 } 2601 2602 out: 2603 kfree(user_wr); 2604 2605 return ret ? ret : in_len; 2606 } 2607 2608 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf, 2609 int in_len, 2610 u32 wr_count, 2611 u32 sge_count, 2612 u32 wqe_size) 2613 { 2614 struct ib_uverbs_recv_wr *user_wr; 2615 struct ib_recv_wr *wr = NULL, *last, *next; 2616 int sg_ind; 2617 int i; 2618 int ret; 2619 2620 if (in_len < wqe_size * wr_count + 2621 sge_count * sizeof (struct ib_uverbs_sge)) 2622 return ERR_PTR(-EINVAL); 2623 2624 if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) 2625 return ERR_PTR(-EINVAL); 2626 2627 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2628 if (!user_wr) 2629 return ERR_PTR(-ENOMEM); 2630 2631 sg_ind = 0; 2632 last = NULL; 2633 for (i = 0; i < wr_count; ++i) { 2634 if (copy_from_user(user_wr, buf + i * wqe_size, 2635 wqe_size)) { 2636 ret = -EFAULT; 2637 goto err; 2638 } 2639 2640 if (user_wr->num_sge + sg_ind > sge_count) { 2641 ret = -EINVAL; 2642 goto err; 2643 } 2644 2645 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + 2646 user_wr->num_sge * sizeof (struct ib_sge), 2647 GFP_KERNEL); 2648 if (!next) { 2649 ret = -ENOMEM; 2650 goto err; 2651 } 2652 2653 if (!last) 2654 wr = next; 2655 else 2656 last->next = next; 2657 last = next; 2658 2659 next->next = NULL; 2660 next->wr_id = user_wr->wr_id; 2661 next->num_sge = user_wr->num_sge; 2662 2663 if (next->num_sge) { 2664 next->sg_list = (void *) next + 2665 ALIGN(sizeof *next, sizeof (struct ib_sge)); 2666 if (copy_from_user(next->sg_list, 2667 buf + wr_count * wqe_size + 2668 sg_ind * sizeof (struct ib_sge), 2669 next->num_sge * sizeof (struct ib_sge))) { 2670 ret = -EFAULT; 2671 goto err; 2672 } 2673 sg_ind += next->num_sge; 2674 } else 2675 next->sg_list = NULL; 2676 } 2677 2678 kfree(user_wr); 2679 return wr; 2680 2681 err: 2682 kfree(user_wr); 2683 2684 while (wr) { 2685 next = wr->next; 2686 kfree(wr); 2687 wr = next; 2688 } 2689 2690 return ERR_PTR(ret); 2691 } 2692 2693 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file, 2694 struct ib_device *ib_dev, 2695 const char __user *buf, int in_len, 2696 int out_len) 2697 { 2698 struct ib_uverbs_post_recv cmd; 2699 struct ib_uverbs_post_recv_resp resp; 2700 struct ib_recv_wr *wr, *next, *bad_wr; 2701 struct ib_qp *qp; 2702 ssize_t ret = -EINVAL; 2703 2704 if (copy_from_user(&cmd, buf, sizeof cmd)) 2705 return -EFAULT; 2706 2707 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, 2708 in_len - sizeof cmd, cmd.wr_count, 2709 cmd.sge_count, cmd.wqe_size); 2710 if (IS_ERR(wr)) 2711 return PTR_ERR(wr); 2712 2713 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 2714 if (!qp) 2715 goto out; 2716 2717 resp.bad_wr = 0; 2718 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr); 2719 2720 put_qp_read(qp); 2721 2722 if (ret) 2723 for (next = wr; next; next = next->next) { 2724 ++resp.bad_wr; 2725 if (next == bad_wr) 2726 break; 2727 } 2728 2729 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2730 &resp, sizeof resp)) 2731 ret = -EFAULT; 2732 2733 out: 2734 while (wr) { 2735 next = wr->next; 2736 kfree(wr); 2737 wr = next; 2738 } 2739 2740 return ret ? ret : in_len; 2741 } 2742 2743 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file, 2744 struct ib_device *ib_dev, 2745 const char __user *buf, int in_len, 2746 int out_len) 2747 { 2748 struct ib_uverbs_post_srq_recv cmd; 2749 struct ib_uverbs_post_srq_recv_resp resp; 2750 struct ib_recv_wr *wr, *next, *bad_wr; 2751 struct ib_srq *srq; 2752 ssize_t ret = -EINVAL; 2753 2754 if (copy_from_user(&cmd, buf, sizeof cmd)) 2755 return -EFAULT; 2756 2757 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, 2758 in_len - sizeof cmd, cmd.wr_count, 2759 cmd.sge_count, cmd.wqe_size); 2760 if (IS_ERR(wr)) 2761 return PTR_ERR(wr); 2762 2763 srq = idr_read_srq(cmd.srq_handle, file->ucontext); 2764 if (!srq) 2765 goto out; 2766 2767 resp.bad_wr = 0; 2768 ret = srq->device->post_srq_recv(srq, wr, &bad_wr); 2769 2770 put_srq_read(srq); 2771 2772 if (ret) 2773 for (next = wr; next; next = next->next) { 2774 ++resp.bad_wr; 2775 if (next == bad_wr) 2776 break; 2777 } 2778 2779 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2780 &resp, sizeof resp)) 2781 ret = -EFAULT; 2782 2783 out: 2784 while (wr) { 2785 next = wr->next; 2786 kfree(wr); 2787 wr = next; 2788 } 2789 2790 return ret ? ret : in_len; 2791 } 2792 2793 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file, 2794 struct ib_device *ib_dev, 2795 const char __user *buf, int in_len, 2796 int out_len) 2797 { 2798 struct ib_uverbs_create_ah cmd; 2799 struct ib_uverbs_create_ah_resp resp; 2800 struct ib_uobject *uobj; 2801 struct ib_pd *pd; 2802 struct ib_ah *ah; 2803 struct ib_ah_attr attr; 2804 int ret; 2805 2806 if (out_len < sizeof resp) 2807 return -ENOSPC; 2808 2809 if (copy_from_user(&cmd, buf, sizeof cmd)) 2810 return -EFAULT; 2811 2812 uobj = kmalloc(sizeof *uobj, GFP_KERNEL); 2813 if (!uobj) 2814 return -ENOMEM; 2815 2816 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class); 2817 down_write(&uobj->mutex); 2818 2819 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 2820 if (!pd) { 2821 ret = -EINVAL; 2822 goto err; 2823 } 2824 2825 attr.dlid = cmd.attr.dlid; 2826 attr.sl = cmd.attr.sl; 2827 attr.src_path_bits = cmd.attr.src_path_bits; 2828 attr.static_rate = cmd.attr.static_rate; 2829 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0; 2830 attr.port_num = cmd.attr.port_num; 2831 attr.grh.flow_label = cmd.attr.grh.flow_label; 2832 attr.grh.sgid_index = cmd.attr.grh.sgid_index; 2833 attr.grh.hop_limit = cmd.attr.grh.hop_limit; 2834 attr.grh.traffic_class = cmd.attr.grh.traffic_class; 2835 memset(&attr.dmac, 0, sizeof(attr.dmac)); 2836 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16); 2837 2838 ah = ib_create_ah(pd, &attr); 2839 if (IS_ERR(ah)) { 2840 ret = PTR_ERR(ah); 2841 goto err_put; 2842 } 2843 2844 ah->uobject = uobj; 2845 uobj->object = ah; 2846 2847 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj); 2848 if (ret) 2849 goto err_destroy; 2850 2851 resp.ah_handle = uobj->id; 2852 2853 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2854 &resp, sizeof resp)) { 2855 ret = -EFAULT; 2856 goto err_copy; 2857 } 2858 2859 put_pd_read(pd); 2860 2861 mutex_lock(&file->mutex); 2862 list_add_tail(&uobj->list, &file->ucontext->ah_list); 2863 mutex_unlock(&file->mutex); 2864 2865 uobj->live = 1; 2866 2867 up_write(&uobj->mutex); 2868 2869 return in_len; 2870 2871 err_copy: 2872 idr_remove_uobj(&ib_uverbs_ah_idr, uobj); 2873 2874 err_destroy: 2875 ib_destroy_ah(ah); 2876 2877 err_put: 2878 put_pd_read(pd); 2879 2880 err: 2881 put_uobj_write(uobj); 2882 return ret; 2883 } 2884 2885 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file, 2886 struct ib_device *ib_dev, 2887 const char __user *buf, int in_len, int out_len) 2888 { 2889 struct ib_uverbs_destroy_ah cmd; 2890 struct ib_ah *ah; 2891 struct ib_uobject *uobj; 2892 int ret; 2893 2894 if (copy_from_user(&cmd, buf, sizeof cmd)) 2895 return -EFAULT; 2896 2897 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext); 2898 if (!uobj) 2899 return -EINVAL; 2900 ah = uobj->object; 2901 2902 ret = ib_destroy_ah(ah); 2903 if (!ret) 2904 uobj->live = 0; 2905 2906 put_uobj_write(uobj); 2907 2908 if (ret) 2909 return ret; 2910 2911 idr_remove_uobj(&ib_uverbs_ah_idr, uobj); 2912 2913 mutex_lock(&file->mutex); 2914 list_del(&uobj->list); 2915 mutex_unlock(&file->mutex); 2916 2917 put_uobj(uobj); 2918 2919 return in_len; 2920 } 2921 2922 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file, 2923 struct ib_device *ib_dev, 2924 const char __user *buf, int in_len, 2925 int out_len) 2926 { 2927 struct ib_uverbs_attach_mcast cmd; 2928 struct ib_qp *qp; 2929 struct ib_uqp_object *obj; 2930 struct ib_uverbs_mcast_entry *mcast; 2931 int ret; 2932 2933 if (copy_from_user(&cmd, buf, sizeof cmd)) 2934 return -EFAULT; 2935 2936 qp = idr_write_qp(cmd.qp_handle, file->ucontext); 2937 if (!qp) 2938 return -EINVAL; 2939 2940 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); 2941 2942 list_for_each_entry(mcast, &obj->mcast_list, list) 2943 if (cmd.mlid == mcast->lid && 2944 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2945 ret = 0; 2946 goto out_put; 2947 } 2948 2949 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2950 if (!mcast) { 2951 ret = -ENOMEM; 2952 goto out_put; 2953 } 2954 2955 mcast->lid = cmd.mlid; 2956 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2957 2958 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2959 if (!ret) 2960 list_add_tail(&mcast->list, &obj->mcast_list); 2961 else 2962 kfree(mcast); 2963 2964 out_put: 2965 put_qp_write(qp); 2966 2967 return ret ? ret : in_len; 2968 } 2969 2970 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file, 2971 struct ib_device *ib_dev, 2972 const char __user *buf, int in_len, 2973 int out_len) 2974 { 2975 struct ib_uverbs_detach_mcast cmd; 2976 struct ib_uqp_object *obj; 2977 struct ib_qp *qp; 2978 struct ib_uverbs_mcast_entry *mcast; 2979 int ret = -EINVAL; 2980 2981 if (copy_from_user(&cmd, buf, sizeof cmd)) 2982 return -EFAULT; 2983 2984 qp = idr_write_qp(cmd.qp_handle, file->ucontext); 2985 if (!qp) 2986 return -EINVAL; 2987 2988 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid); 2989 if (ret) 2990 goto out_put; 2991 2992 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); 2993 2994 list_for_each_entry(mcast, &obj->mcast_list, list) 2995 if (cmd.mlid == mcast->lid && 2996 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2997 list_del(&mcast->list); 2998 kfree(mcast); 2999 break; 3000 } 3001 3002 out_put: 3003 put_qp_write(qp); 3004 3005 return ret ? ret : in_len; 3006 } 3007 3008 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec, 3009 union ib_flow_spec *ib_spec) 3010 { 3011 if (kern_spec->reserved) 3012 return -EINVAL; 3013 3014 ib_spec->type = kern_spec->type; 3015 3016 switch (ib_spec->type) { 3017 case IB_FLOW_SPEC_ETH: 3018 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth); 3019 if (ib_spec->eth.size != kern_spec->eth.size) 3020 return -EINVAL; 3021 memcpy(&ib_spec->eth.val, &kern_spec->eth.val, 3022 sizeof(struct ib_flow_eth_filter)); 3023 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask, 3024 sizeof(struct ib_flow_eth_filter)); 3025 break; 3026 case IB_FLOW_SPEC_IPV4: 3027 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4); 3028 if (ib_spec->ipv4.size != kern_spec->ipv4.size) 3029 return -EINVAL; 3030 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val, 3031 sizeof(struct ib_flow_ipv4_filter)); 3032 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask, 3033 sizeof(struct ib_flow_ipv4_filter)); 3034 break; 3035 case IB_FLOW_SPEC_TCP: 3036 case IB_FLOW_SPEC_UDP: 3037 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp); 3038 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size) 3039 return -EINVAL; 3040 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val, 3041 sizeof(struct ib_flow_tcp_udp_filter)); 3042 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask, 3043 sizeof(struct ib_flow_tcp_udp_filter)); 3044 break; 3045 default: 3046 return -EINVAL; 3047 } 3048 return 0; 3049 } 3050 3051 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file, 3052 struct ib_device *ib_dev, 3053 struct ib_udata *ucore, 3054 struct ib_udata *uhw) 3055 { 3056 struct ib_uverbs_create_flow cmd; 3057 struct ib_uverbs_create_flow_resp resp; 3058 struct ib_uobject *uobj; 3059 struct ib_flow *flow_id; 3060 struct ib_uverbs_flow_attr *kern_flow_attr; 3061 struct ib_flow_attr *flow_attr; 3062 struct ib_qp *qp; 3063 int err = 0; 3064 void *kern_spec; 3065 void *ib_spec; 3066 int i; 3067 3068 if (ucore->inlen < sizeof(cmd)) 3069 return -EINVAL; 3070 3071 if (ucore->outlen < sizeof(resp)) 3072 return -ENOSPC; 3073 3074 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); 3075 if (err) 3076 return err; 3077 3078 ucore->inbuf += sizeof(cmd); 3079 ucore->inlen -= sizeof(cmd); 3080 3081 if (cmd.comp_mask) 3082 return -EINVAL; 3083 3084 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER && 3085 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW)) 3086 return -EPERM; 3087 3088 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3089 return -EINVAL; 3090 3091 if (cmd.flow_attr.size > ucore->inlen || 3092 cmd.flow_attr.size > 3093 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3094 return -EINVAL; 3095 3096 if (cmd.flow_attr.reserved[0] || 3097 cmd.flow_attr.reserved[1]) 3098 return -EINVAL; 3099 3100 if (cmd.flow_attr.num_of_specs) { 3101 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3102 GFP_KERNEL); 3103 if (!kern_flow_attr) 3104 return -ENOMEM; 3105 3106 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr)); 3107 err = ib_copy_from_udata(kern_flow_attr + 1, ucore, 3108 cmd.flow_attr.size); 3109 if (err) 3110 goto err_free_attr; 3111 } else { 3112 kern_flow_attr = &cmd.flow_attr; 3113 } 3114 3115 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); 3116 if (!uobj) { 3117 err = -ENOMEM; 3118 goto err_free_attr; 3119 } 3120 init_uobj(uobj, 0, file->ucontext, &rule_lock_class); 3121 down_write(&uobj->mutex); 3122 3123 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 3124 if (!qp) { 3125 err = -EINVAL; 3126 goto err_uobj; 3127 } 3128 3129 flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL); 3130 if (!flow_attr) { 3131 err = -ENOMEM; 3132 goto err_put; 3133 } 3134 3135 flow_attr->type = kern_flow_attr->type; 3136 flow_attr->priority = kern_flow_attr->priority; 3137 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3138 flow_attr->port = kern_flow_attr->port; 3139 flow_attr->flags = kern_flow_attr->flags; 3140 flow_attr->size = sizeof(*flow_attr); 3141 3142 kern_spec = kern_flow_attr + 1; 3143 ib_spec = flow_attr + 1; 3144 for (i = 0; i < flow_attr->num_of_specs && 3145 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) && 3146 cmd.flow_attr.size >= 3147 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) { 3148 err = kern_spec_to_ib_spec(kern_spec, ib_spec); 3149 if (err) 3150 goto err_free; 3151 flow_attr->size += 3152 ((union ib_flow_spec *) ib_spec)->size; 3153 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size; 3154 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size; 3155 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3156 } 3157 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3158 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n", 3159 i, cmd.flow_attr.size); 3160 err = -EINVAL; 3161 goto err_free; 3162 } 3163 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER); 3164 if (IS_ERR(flow_id)) { 3165 err = PTR_ERR(flow_id); 3166 goto err_free; 3167 } 3168 flow_id->qp = qp; 3169 flow_id->uobject = uobj; 3170 uobj->object = flow_id; 3171 3172 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj); 3173 if (err) 3174 goto destroy_flow; 3175 3176 memset(&resp, 0, sizeof(resp)); 3177 resp.flow_handle = uobj->id; 3178 3179 err = ib_copy_to_udata(ucore, 3180 &resp, sizeof(resp)); 3181 if (err) 3182 goto err_copy; 3183 3184 put_qp_read(qp); 3185 mutex_lock(&file->mutex); 3186 list_add_tail(&uobj->list, &file->ucontext->rule_list); 3187 mutex_unlock(&file->mutex); 3188 3189 uobj->live = 1; 3190 3191 up_write(&uobj->mutex); 3192 kfree(flow_attr); 3193 if (cmd.flow_attr.num_of_specs) 3194 kfree(kern_flow_attr); 3195 return 0; 3196 err_copy: 3197 idr_remove_uobj(&ib_uverbs_rule_idr, uobj); 3198 destroy_flow: 3199 ib_destroy_flow(flow_id); 3200 err_free: 3201 kfree(flow_attr); 3202 err_put: 3203 put_qp_read(qp); 3204 err_uobj: 3205 put_uobj_write(uobj); 3206 err_free_attr: 3207 if (cmd.flow_attr.num_of_specs) 3208 kfree(kern_flow_attr); 3209 return err; 3210 } 3211 3212 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file, 3213 struct ib_device *ib_dev, 3214 struct ib_udata *ucore, 3215 struct ib_udata *uhw) 3216 { 3217 struct ib_uverbs_destroy_flow cmd; 3218 struct ib_flow *flow_id; 3219 struct ib_uobject *uobj; 3220 int ret; 3221 3222 if (ucore->inlen < sizeof(cmd)) 3223 return -EINVAL; 3224 3225 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); 3226 if (ret) 3227 return ret; 3228 3229 if (cmd.comp_mask) 3230 return -EINVAL; 3231 3232 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle, 3233 file->ucontext); 3234 if (!uobj) 3235 return -EINVAL; 3236 flow_id = uobj->object; 3237 3238 ret = ib_destroy_flow(flow_id); 3239 if (!ret) 3240 uobj->live = 0; 3241 3242 put_uobj_write(uobj); 3243 3244 idr_remove_uobj(&ib_uverbs_rule_idr, uobj); 3245 3246 mutex_lock(&file->mutex); 3247 list_del(&uobj->list); 3248 mutex_unlock(&file->mutex); 3249 3250 put_uobj(uobj); 3251 3252 return ret; 3253 } 3254 3255 static int __uverbs_create_xsrq(struct ib_uverbs_file *file, 3256 struct ib_device *ib_dev, 3257 struct ib_uverbs_create_xsrq *cmd, 3258 struct ib_udata *udata) 3259 { 3260 struct ib_uverbs_create_srq_resp resp; 3261 struct ib_usrq_object *obj; 3262 struct ib_pd *pd; 3263 struct ib_srq *srq; 3264 struct ib_uobject *uninitialized_var(xrcd_uobj); 3265 struct ib_srq_init_attr attr; 3266 int ret; 3267 3268 obj = kmalloc(sizeof *obj, GFP_KERNEL); 3269 if (!obj) 3270 return -ENOMEM; 3271 3272 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class); 3273 down_write(&obj->uevent.uobject.mutex); 3274 3275 if (cmd->srq_type == IB_SRQT_XRC) { 3276 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj); 3277 if (!attr.ext.xrc.xrcd) { 3278 ret = -EINVAL; 3279 goto err; 3280 } 3281 3282 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3283 atomic_inc(&obj->uxrcd->refcnt); 3284 3285 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0); 3286 if (!attr.ext.xrc.cq) { 3287 ret = -EINVAL; 3288 goto err_put_xrcd; 3289 } 3290 } 3291 3292 pd = idr_read_pd(cmd->pd_handle, file->ucontext); 3293 if (!pd) { 3294 ret = -EINVAL; 3295 goto err_put_cq; 3296 } 3297 3298 attr.event_handler = ib_uverbs_srq_event_handler; 3299 attr.srq_context = file; 3300 attr.srq_type = cmd->srq_type; 3301 attr.attr.max_wr = cmd->max_wr; 3302 attr.attr.max_sge = cmd->max_sge; 3303 attr.attr.srq_limit = cmd->srq_limit; 3304 3305 obj->uevent.events_reported = 0; 3306 INIT_LIST_HEAD(&obj->uevent.event_list); 3307 3308 srq = pd->device->create_srq(pd, &attr, udata); 3309 if (IS_ERR(srq)) { 3310 ret = PTR_ERR(srq); 3311 goto err_put; 3312 } 3313 3314 srq->device = pd->device; 3315 srq->pd = pd; 3316 srq->srq_type = cmd->srq_type; 3317 srq->uobject = &obj->uevent.uobject; 3318 srq->event_handler = attr.event_handler; 3319 srq->srq_context = attr.srq_context; 3320 3321 if (cmd->srq_type == IB_SRQT_XRC) { 3322 srq->ext.xrc.cq = attr.ext.xrc.cq; 3323 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd; 3324 atomic_inc(&attr.ext.xrc.cq->usecnt); 3325 atomic_inc(&attr.ext.xrc.xrcd->usecnt); 3326 } 3327 3328 atomic_inc(&pd->usecnt); 3329 atomic_set(&srq->usecnt, 0); 3330 3331 obj->uevent.uobject.object = srq; 3332 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject); 3333 if (ret) 3334 goto err_destroy; 3335 3336 memset(&resp, 0, sizeof resp); 3337 resp.srq_handle = obj->uevent.uobject.id; 3338 resp.max_wr = attr.attr.max_wr; 3339 resp.max_sge = attr.attr.max_sge; 3340 if (cmd->srq_type == IB_SRQT_XRC) 3341 resp.srqn = srq->ext.xrc.srq_num; 3342 3343 if (copy_to_user((void __user *) (unsigned long) cmd->response, 3344 &resp, sizeof resp)) { 3345 ret = -EFAULT; 3346 goto err_copy; 3347 } 3348 3349 if (cmd->srq_type == IB_SRQT_XRC) { 3350 put_uobj_read(xrcd_uobj); 3351 put_cq_read(attr.ext.xrc.cq); 3352 } 3353 put_pd_read(pd); 3354 3355 mutex_lock(&file->mutex); 3356 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list); 3357 mutex_unlock(&file->mutex); 3358 3359 obj->uevent.uobject.live = 1; 3360 3361 up_write(&obj->uevent.uobject.mutex); 3362 3363 return 0; 3364 3365 err_copy: 3366 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject); 3367 3368 err_destroy: 3369 ib_destroy_srq(srq); 3370 3371 err_put: 3372 put_pd_read(pd); 3373 3374 err_put_cq: 3375 if (cmd->srq_type == IB_SRQT_XRC) 3376 put_cq_read(attr.ext.xrc.cq); 3377 3378 err_put_xrcd: 3379 if (cmd->srq_type == IB_SRQT_XRC) { 3380 atomic_dec(&obj->uxrcd->refcnt); 3381 put_uobj_read(xrcd_uobj); 3382 } 3383 3384 err: 3385 put_uobj_write(&obj->uevent.uobject); 3386 return ret; 3387 } 3388 3389 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file, 3390 struct ib_device *ib_dev, 3391 const char __user *buf, int in_len, 3392 int out_len) 3393 { 3394 struct ib_uverbs_create_srq cmd; 3395 struct ib_uverbs_create_xsrq xcmd; 3396 struct ib_uverbs_create_srq_resp resp; 3397 struct ib_udata udata; 3398 int ret; 3399 3400 if (out_len < sizeof resp) 3401 return -ENOSPC; 3402 3403 if (copy_from_user(&cmd, buf, sizeof cmd)) 3404 return -EFAULT; 3405 3406 xcmd.response = cmd.response; 3407 xcmd.user_handle = cmd.user_handle; 3408 xcmd.srq_type = IB_SRQT_BASIC; 3409 xcmd.pd_handle = cmd.pd_handle; 3410 xcmd.max_wr = cmd.max_wr; 3411 xcmd.max_sge = cmd.max_sge; 3412 xcmd.srq_limit = cmd.srq_limit; 3413 3414 INIT_UDATA(&udata, buf + sizeof cmd, 3415 (unsigned long) cmd.response + sizeof resp, 3416 in_len - sizeof cmd, out_len - sizeof resp); 3417 3418 ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata); 3419 if (ret) 3420 return ret; 3421 3422 return in_len; 3423 } 3424 3425 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file, 3426 struct ib_device *ib_dev, 3427 const char __user *buf, int in_len, int out_len) 3428 { 3429 struct ib_uverbs_create_xsrq cmd; 3430 struct ib_uverbs_create_srq_resp resp; 3431 struct ib_udata udata; 3432 int ret; 3433 3434 if (out_len < sizeof resp) 3435 return -ENOSPC; 3436 3437 if (copy_from_user(&cmd, buf, sizeof cmd)) 3438 return -EFAULT; 3439 3440 INIT_UDATA(&udata, buf + sizeof cmd, 3441 (unsigned long) cmd.response + sizeof resp, 3442 in_len - sizeof cmd, out_len - sizeof resp); 3443 3444 ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata); 3445 if (ret) 3446 return ret; 3447 3448 return in_len; 3449 } 3450 3451 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file, 3452 struct ib_device *ib_dev, 3453 const char __user *buf, int in_len, 3454 int out_len) 3455 { 3456 struct ib_uverbs_modify_srq cmd; 3457 struct ib_udata udata; 3458 struct ib_srq *srq; 3459 struct ib_srq_attr attr; 3460 int ret; 3461 3462 if (copy_from_user(&cmd, buf, sizeof cmd)) 3463 return -EFAULT; 3464 3465 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, 3466 out_len); 3467 3468 srq = idr_read_srq(cmd.srq_handle, file->ucontext); 3469 if (!srq) 3470 return -EINVAL; 3471 3472 attr.max_wr = cmd.max_wr; 3473 attr.srq_limit = cmd.srq_limit; 3474 3475 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata); 3476 3477 put_srq_read(srq); 3478 3479 return ret ? ret : in_len; 3480 } 3481 3482 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file, 3483 struct ib_device *ib_dev, 3484 const char __user *buf, 3485 int in_len, int out_len) 3486 { 3487 struct ib_uverbs_query_srq cmd; 3488 struct ib_uverbs_query_srq_resp resp; 3489 struct ib_srq_attr attr; 3490 struct ib_srq *srq; 3491 int ret; 3492 3493 if (out_len < sizeof resp) 3494 return -ENOSPC; 3495 3496 if (copy_from_user(&cmd, buf, sizeof cmd)) 3497 return -EFAULT; 3498 3499 srq = idr_read_srq(cmd.srq_handle, file->ucontext); 3500 if (!srq) 3501 return -EINVAL; 3502 3503 ret = ib_query_srq(srq, &attr); 3504 3505 put_srq_read(srq); 3506 3507 if (ret) 3508 return ret; 3509 3510 memset(&resp, 0, sizeof resp); 3511 3512 resp.max_wr = attr.max_wr; 3513 resp.max_sge = attr.max_sge; 3514 resp.srq_limit = attr.srq_limit; 3515 3516 if (copy_to_user((void __user *) (unsigned long) cmd.response, 3517 &resp, sizeof resp)) 3518 return -EFAULT; 3519 3520 return in_len; 3521 } 3522 3523 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file, 3524 struct ib_device *ib_dev, 3525 const char __user *buf, int in_len, 3526 int out_len) 3527 { 3528 struct ib_uverbs_destroy_srq cmd; 3529 struct ib_uverbs_destroy_srq_resp resp; 3530 struct ib_uobject *uobj; 3531 struct ib_srq *srq; 3532 struct ib_uevent_object *obj; 3533 int ret = -EINVAL; 3534 struct ib_usrq_object *us; 3535 enum ib_srq_type srq_type; 3536 3537 if (copy_from_user(&cmd, buf, sizeof cmd)) 3538 return -EFAULT; 3539 3540 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext); 3541 if (!uobj) 3542 return -EINVAL; 3543 srq = uobj->object; 3544 obj = container_of(uobj, struct ib_uevent_object, uobject); 3545 srq_type = srq->srq_type; 3546 3547 ret = ib_destroy_srq(srq); 3548 if (!ret) 3549 uobj->live = 0; 3550 3551 put_uobj_write(uobj); 3552 3553 if (ret) 3554 return ret; 3555 3556 if (srq_type == IB_SRQT_XRC) { 3557 us = container_of(obj, struct ib_usrq_object, uevent); 3558 atomic_dec(&us->uxrcd->refcnt); 3559 } 3560 3561 idr_remove_uobj(&ib_uverbs_srq_idr, uobj); 3562 3563 mutex_lock(&file->mutex); 3564 list_del(&uobj->list); 3565 mutex_unlock(&file->mutex); 3566 3567 ib_uverbs_release_uevent(file, obj); 3568 3569 memset(&resp, 0, sizeof resp); 3570 resp.events_reported = obj->events_reported; 3571 3572 put_uobj(uobj); 3573 3574 if (copy_to_user((void __user *) (unsigned long) cmd.response, 3575 &resp, sizeof resp)) 3576 ret = -EFAULT; 3577 3578 return ret ? ret : in_len; 3579 } 3580 3581 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file, 3582 struct ib_device *ib_dev, 3583 struct ib_udata *ucore, 3584 struct ib_udata *uhw) 3585 { 3586 struct ib_uverbs_ex_query_device_resp resp; 3587 struct ib_uverbs_ex_query_device cmd; 3588 struct ib_device_attr attr; 3589 int err; 3590 3591 if (ucore->inlen < sizeof(cmd)) 3592 return -EINVAL; 3593 3594 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); 3595 if (err) 3596 return err; 3597 3598 if (cmd.comp_mask) 3599 return -EINVAL; 3600 3601 if (cmd.reserved) 3602 return -EINVAL; 3603 3604 resp.response_length = offsetof(typeof(resp), odp_caps); 3605 3606 if (ucore->outlen < resp.response_length) 3607 return -ENOSPC; 3608 3609 memset(&attr, 0, sizeof(attr)); 3610 3611 err = ib_dev->query_device(ib_dev, &attr, uhw); 3612 if (err) 3613 return err; 3614 3615 copy_query_dev_fields(file, ib_dev, &resp.base, &attr); 3616 resp.comp_mask = 0; 3617 3618 if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps)) 3619 goto end; 3620 3621 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING 3622 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3623 resp.odp_caps.per_transport_caps.rc_odp_caps = 3624 attr.odp_caps.per_transport_caps.rc_odp_caps; 3625 resp.odp_caps.per_transport_caps.uc_odp_caps = 3626 attr.odp_caps.per_transport_caps.uc_odp_caps; 3627 resp.odp_caps.per_transport_caps.ud_odp_caps = 3628 attr.odp_caps.per_transport_caps.ud_odp_caps; 3629 resp.odp_caps.reserved = 0; 3630 #else 3631 memset(&resp.odp_caps, 0, sizeof(resp.odp_caps)); 3632 #endif 3633 resp.response_length += sizeof(resp.odp_caps); 3634 3635 if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask)) 3636 goto end; 3637 3638 resp.timestamp_mask = attr.timestamp_mask; 3639 resp.response_length += sizeof(resp.timestamp_mask); 3640 3641 if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock)) 3642 goto end; 3643 3644 resp.hca_core_clock = attr.hca_core_clock; 3645 resp.response_length += sizeof(resp.hca_core_clock); 3646 3647 end: 3648 err = ib_copy_to_udata(ucore, &resp, resp.response_length); 3649 if (err) 3650 return err; 3651 3652 return 0; 3653 } 3654