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 atomic_set(&mr->usecnt, 0); 997 998 uobj->object = mr; 999 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj); 1000 if (ret) 1001 goto err_unreg; 1002 1003 memset(&resp, 0, sizeof resp); 1004 resp.lkey = mr->lkey; 1005 resp.rkey = mr->rkey; 1006 resp.mr_handle = uobj->id; 1007 1008 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1009 &resp, sizeof resp)) { 1010 ret = -EFAULT; 1011 goto err_copy; 1012 } 1013 1014 put_pd_read(pd); 1015 1016 mutex_lock(&file->mutex); 1017 list_add_tail(&uobj->list, &file->ucontext->mr_list); 1018 mutex_unlock(&file->mutex); 1019 1020 uobj->live = 1; 1021 1022 up_write(&uobj->mutex); 1023 1024 return in_len; 1025 1026 err_copy: 1027 idr_remove_uobj(&ib_uverbs_mr_idr, uobj); 1028 1029 err_unreg: 1030 ib_dereg_mr(mr); 1031 1032 err_put: 1033 put_pd_read(pd); 1034 1035 err_free: 1036 put_uobj_write(uobj); 1037 return ret; 1038 } 1039 1040 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file, 1041 struct ib_device *ib_dev, 1042 const char __user *buf, int in_len, 1043 int out_len) 1044 { 1045 struct ib_uverbs_rereg_mr cmd; 1046 struct ib_uverbs_rereg_mr_resp resp; 1047 struct ib_udata udata; 1048 struct ib_pd *pd = NULL; 1049 struct ib_mr *mr; 1050 struct ib_pd *old_pd; 1051 int ret; 1052 struct ib_uobject *uobj; 1053 1054 if (out_len < sizeof(resp)) 1055 return -ENOSPC; 1056 1057 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1058 return -EFAULT; 1059 1060 INIT_UDATA(&udata, buf + sizeof(cmd), 1061 (unsigned long) cmd.response + sizeof(resp), 1062 in_len - sizeof(cmd), out_len - sizeof(resp)); 1063 1064 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) 1065 return -EINVAL; 1066 1067 if ((cmd.flags & IB_MR_REREG_TRANS) && 1068 (!cmd.start || !cmd.hca_va || 0 >= cmd.length || 1069 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) 1070 return -EINVAL; 1071 1072 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, 1073 file->ucontext); 1074 1075 if (!uobj) 1076 return -EINVAL; 1077 1078 mr = uobj->object; 1079 1080 if (cmd.flags & IB_MR_REREG_ACCESS) { 1081 ret = ib_check_mr_access(cmd.access_flags); 1082 if (ret) 1083 goto put_uobjs; 1084 } 1085 1086 if (cmd.flags & IB_MR_REREG_PD) { 1087 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 1088 if (!pd) { 1089 ret = -EINVAL; 1090 goto put_uobjs; 1091 } 1092 } 1093 1094 if (atomic_read(&mr->usecnt)) { 1095 ret = -EBUSY; 1096 goto put_uobj_pd; 1097 } 1098 1099 old_pd = mr->pd; 1100 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start, 1101 cmd.length, cmd.hca_va, 1102 cmd.access_flags, pd, &udata); 1103 if (!ret) { 1104 if (cmd.flags & IB_MR_REREG_PD) { 1105 atomic_inc(&pd->usecnt); 1106 mr->pd = pd; 1107 atomic_dec(&old_pd->usecnt); 1108 } 1109 } else { 1110 goto put_uobj_pd; 1111 } 1112 1113 memset(&resp, 0, sizeof(resp)); 1114 resp.lkey = mr->lkey; 1115 resp.rkey = mr->rkey; 1116 1117 if (copy_to_user((void __user *)(unsigned long)cmd.response, 1118 &resp, sizeof(resp))) 1119 ret = -EFAULT; 1120 else 1121 ret = in_len; 1122 1123 put_uobj_pd: 1124 if (cmd.flags & IB_MR_REREG_PD) 1125 put_pd_read(pd); 1126 1127 put_uobjs: 1128 1129 put_uobj_write(mr->uobject); 1130 1131 return ret; 1132 } 1133 1134 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file, 1135 struct ib_device *ib_dev, 1136 const char __user *buf, int in_len, 1137 int out_len) 1138 { 1139 struct ib_uverbs_dereg_mr cmd; 1140 struct ib_mr *mr; 1141 struct ib_uobject *uobj; 1142 int ret = -EINVAL; 1143 1144 if (copy_from_user(&cmd, buf, sizeof cmd)) 1145 return -EFAULT; 1146 1147 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext); 1148 if (!uobj) 1149 return -EINVAL; 1150 1151 mr = uobj->object; 1152 1153 ret = ib_dereg_mr(mr); 1154 if (!ret) 1155 uobj->live = 0; 1156 1157 put_uobj_write(uobj); 1158 1159 if (ret) 1160 return ret; 1161 1162 idr_remove_uobj(&ib_uverbs_mr_idr, uobj); 1163 1164 mutex_lock(&file->mutex); 1165 list_del(&uobj->list); 1166 mutex_unlock(&file->mutex); 1167 1168 put_uobj(uobj); 1169 1170 return in_len; 1171 } 1172 1173 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file, 1174 struct ib_device *ib_dev, 1175 const char __user *buf, int in_len, 1176 int out_len) 1177 { 1178 struct ib_uverbs_alloc_mw cmd; 1179 struct ib_uverbs_alloc_mw_resp resp; 1180 struct ib_uobject *uobj; 1181 struct ib_pd *pd; 1182 struct ib_mw *mw; 1183 int ret; 1184 1185 if (out_len < sizeof(resp)) 1186 return -ENOSPC; 1187 1188 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1189 return -EFAULT; 1190 1191 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); 1192 if (!uobj) 1193 return -ENOMEM; 1194 1195 init_uobj(uobj, 0, file->ucontext, &mw_lock_class); 1196 down_write(&uobj->mutex); 1197 1198 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 1199 if (!pd) { 1200 ret = -EINVAL; 1201 goto err_free; 1202 } 1203 1204 mw = pd->device->alloc_mw(pd, cmd.mw_type); 1205 if (IS_ERR(mw)) { 1206 ret = PTR_ERR(mw); 1207 goto err_put; 1208 } 1209 1210 mw->device = pd->device; 1211 mw->pd = pd; 1212 mw->uobject = uobj; 1213 atomic_inc(&pd->usecnt); 1214 1215 uobj->object = mw; 1216 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj); 1217 if (ret) 1218 goto err_unalloc; 1219 1220 memset(&resp, 0, sizeof(resp)); 1221 resp.rkey = mw->rkey; 1222 resp.mw_handle = uobj->id; 1223 1224 if (copy_to_user((void __user *)(unsigned long)cmd.response, 1225 &resp, sizeof(resp))) { 1226 ret = -EFAULT; 1227 goto err_copy; 1228 } 1229 1230 put_pd_read(pd); 1231 1232 mutex_lock(&file->mutex); 1233 list_add_tail(&uobj->list, &file->ucontext->mw_list); 1234 mutex_unlock(&file->mutex); 1235 1236 uobj->live = 1; 1237 1238 up_write(&uobj->mutex); 1239 1240 return in_len; 1241 1242 err_copy: 1243 idr_remove_uobj(&ib_uverbs_mw_idr, uobj); 1244 1245 err_unalloc: 1246 uverbs_dealloc_mw(mw); 1247 1248 err_put: 1249 put_pd_read(pd); 1250 1251 err_free: 1252 put_uobj_write(uobj); 1253 return ret; 1254 } 1255 1256 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file, 1257 struct ib_device *ib_dev, 1258 const char __user *buf, int in_len, 1259 int out_len) 1260 { 1261 struct ib_uverbs_dealloc_mw cmd; 1262 struct ib_mw *mw; 1263 struct ib_uobject *uobj; 1264 int ret = -EINVAL; 1265 1266 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1267 return -EFAULT; 1268 1269 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext); 1270 if (!uobj) 1271 return -EINVAL; 1272 1273 mw = uobj->object; 1274 1275 ret = uverbs_dealloc_mw(mw); 1276 if (!ret) 1277 uobj->live = 0; 1278 1279 put_uobj_write(uobj); 1280 1281 if (ret) 1282 return ret; 1283 1284 idr_remove_uobj(&ib_uverbs_mw_idr, uobj); 1285 1286 mutex_lock(&file->mutex); 1287 list_del(&uobj->list); 1288 mutex_unlock(&file->mutex); 1289 1290 put_uobj(uobj); 1291 1292 return in_len; 1293 } 1294 1295 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, 1296 struct ib_device *ib_dev, 1297 const char __user *buf, int in_len, 1298 int out_len) 1299 { 1300 struct ib_uverbs_create_comp_channel cmd; 1301 struct ib_uverbs_create_comp_channel_resp resp; 1302 struct file *filp; 1303 int ret; 1304 1305 if (out_len < sizeof resp) 1306 return -ENOSPC; 1307 1308 if (copy_from_user(&cmd, buf, sizeof cmd)) 1309 return -EFAULT; 1310 1311 ret = get_unused_fd_flags(O_CLOEXEC); 1312 if (ret < 0) 1313 return ret; 1314 resp.fd = ret; 1315 1316 filp = ib_uverbs_alloc_event_file(file, ib_dev, 0); 1317 if (IS_ERR(filp)) { 1318 put_unused_fd(resp.fd); 1319 return PTR_ERR(filp); 1320 } 1321 1322 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1323 &resp, sizeof resp)) { 1324 put_unused_fd(resp.fd); 1325 fput(filp); 1326 return -EFAULT; 1327 } 1328 1329 fd_install(resp.fd, filp); 1330 return in_len; 1331 } 1332 1333 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file, 1334 struct ib_device *ib_dev, 1335 struct ib_udata *ucore, 1336 struct ib_udata *uhw, 1337 struct ib_uverbs_ex_create_cq *cmd, 1338 size_t cmd_sz, 1339 int (*cb)(struct ib_uverbs_file *file, 1340 struct ib_ucq_object *obj, 1341 struct ib_uverbs_ex_create_cq_resp *resp, 1342 struct ib_udata *udata, 1343 void *context), 1344 void *context) 1345 { 1346 struct ib_ucq_object *obj; 1347 struct ib_uverbs_event_file *ev_file = NULL; 1348 struct ib_cq *cq; 1349 int ret; 1350 struct ib_uverbs_ex_create_cq_resp resp; 1351 struct ib_cq_init_attr attr = {}; 1352 1353 if (cmd->comp_vector >= file->device->num_comp_vectors) 1354 return ERR_PTR(-EINVAL); 1355 1356 obj = kmalloc(sizeof *obj, GFP_KERNEL); 1357 if (!obj) 1358 return ERR_PTR(-ENOMEM); 1359 1360 init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class); 1361 down_write(&obj->uobject.mutex); 1362 1363 if (cmd->comp_channel >= 0) { 1364 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel); 1365 if (!ev_file) { 1366 ret = -EINVAL; 1367 goto err; 1368 } 1369 } 1370 1371 obj->uverbs_file = file; 1372 obj->comp_events_reported = 0; 1373 obj->async_events_reported = 0; 1374 INIT_LIST_HEAD(&obj->comp_list); 1375 INIT_LIST_HEAD(&obj->async_list); 1376 1377 attr.cqe = cmd->cqe; 1378 attr.comp_vector = cmd->comp_vector; 1379 1380 if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags)) 1381 attr.flags = cmd->flags; 1382 1383 cq = ib_dev->create_cq(ib_dev, &attr, 1384 file->ucontext, uhw); 1385 if (IS_ERR(cq)) { 1386 ret = PTR_ERR(cq); 1387 goto err_file; 1388 } 1389 1390 cq->device = ib_dev; 1391 cq->uobject = &obj->uobject; 1392 cq->comp_handler = ib_uverbs_comp_handler; 1393 cq->event_handler = ib_uverbs_cq_event_handler; 1394 cq->cq_context = ev_file; 1395 atomic_set(&cq->usecnt, 0); 1396 1397 obj->uobject.object = cq; 1398 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject); 1399 if (ret) 1400 goto err_free; 1401 1402 memset(&resp, 0, sizeof resp); 1403 resp.base.cq_handle = obj->uobject.id; 1404 resp.base.cqe = cq->cqe; 1405 1406 resp.response_length = offsetof(typeof(resp), response_length) + 1407 sizeof(resp.response_length); 1408 1409 ret = cb(file, obj, &resp, ucore, context); 1410 if (ret) 1411 goto err_cb; 1412 1413 mutex_lock(&file->mutex); 1414 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list); 1415 mutex_unlock(&file->mutex); 1416 1417 obj->uobject.live = 1; 1418 1419 up_write(&obj->uobject.mutex); 1420 1421 return obj; 1422 1423 err_cb: 1424 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject); 1425 1426 err_free: 1427 ib_destroy_cq(cq); 1428 1429 err_file: 1430 if (ev_file) 1431 ib_uverbs_release_ucq(file, ev_file, obj); 1432 1433 err: 1434 put_uobj_write(&obj->uobject); 1435 1436 return ERR_PTR(ret); 1437 } 1438 1439 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file, 1440 struct ib_ucq_object *obj, 1441 struct ib_uverbs_ex_create_cq_resp *resp, 1442 struct ib_udata *ucore, void *context) 1443 { 1444 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base))) 1445 return -EFAULT; 1446 1447 return 0; 1448 } 1449 1450 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, 1451 struct ib_device *ib_dev, 1452 const char __user *buf, int in_len, 1453 int out_len) 1454 { 1455 struct ib_uverbs_create_cq cmd; 1456 struct ib_uverbs_ex_create_cq cmd_ex; 1457 struct ib_uverbs_create_cq_resp resp; 1458 struct ib_udata ucore; 1459 struct ib_udata uhw; 1460 struct ib_ucq_object *obj; 1461 1462 if (out_len < sizeof(resp)) 1463 return -ENOSPC; 1464 1465 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1466 return -EFAULT; 1467 1468 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), sizeof(resp)); 1469 1470 INIT_UDATA(&uhw, buf + sizeof(cmd), 1471 (unsigned long)cmd.response + sizeof(resp), 1472 in_len - sizeof(cmd), out_len - sizeof(resp)); 1473 1474 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1475 cmd_ex.user_handle = cmd.user_handle; 1476 cmd_ex.cqe = cmd.cqe; 1477 cmd_ex.comp_vector = cmd.comp_vector; 1478 cmd_ex.comp_channel = cmd.comp_channel; 1479 1480 obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex, 1481 offsetof(typeof(cmd_ex), comp_channel) + 1482 sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb, 1483 NULL); 1484 1485 if (IS_ERR(obj)) 1486 return PTR_ERR(obj); 1487 1488 return in_len; 1489 } 1490 1491 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file, 1492 struct ib_ucq_object *obj, 1493 struct ib_uverbs_ex_create_cq_resp *resp, 1494 struct ib_udata *ucore, void *context) 1495 { 1496 if (ib_copy_to_udata(ucore, resp, resp->response_length)) 1497 return -EFAULT; 1498 1499 return 0; 1500 } 1501 1502 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file, 1503 struct ib_device *ib_dev, 1504 struct ib_udata *ucore, 1505 struct ib_udata *uhw) 1506 { 1507 struct ib_uverbs_ex_create_cq_resp resp; 1508 struct ib_uverbs_ex_create_cq cmd; 1509 struct ib_ucq_object *obj; 1510 int err; 1511 1512 if (ucore->inlen < sizeof(cmd)) 1513 return -EINVAL; 1514 1515 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); 1516 if (err) 1517 return err; 1518 1519 if (cmd.comp_mask) 1520 return -EINVAL; 1521 1522 if (cmd.reserved) 1523 return -EINVAL; 1524 1525 if (ucore->outlen < (offsetof(typeof(resp), response_length) + 1526 sizeof(resp.response_length))) 1527 return -ENOSPC; 1528 1529 obj = create_cq(file, ib_dev, ucore, uhw, &cmd, 1530 min(ucore->inlen, sizeof(cmd)), 1531 ib_uverbs_ex_create_cq_cb, NULL); 1532 1533 if (IS_ERR(obj)) 1534 return PTR_ERR(obj); 1535 1536 return 0; 1537 } 1538 1539 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file, 1540 struct ib_device *ib_dev, 1541 const char __user *buf, int in_len, 1542 int out_len) 1543 { 1544 struct ib_uverbs_resize_cq cmd; 1545 struct ib_uverbs_resize_cq_resp resp; 1546 struct ib_udata udata; 1547 struct ib_cq *cq; 1548 int ret = -EINVAL; 1549 1550 if (copy_from_user(&cmd, buf, sizeof cmd)) 1551 return -EFAULT; 1552 1553 INIT_UDATA(&udata, buf + sizeof cmd, 1554 (unsigned long) cmd.response + sizeof resp, 1555 in_len - sizeof cmd, out_len - sizeof resp); 1556 1557 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); 1558 if (!cq) 1559 return -EINVAL; 1560 1561 ret = cq->device->resize_cq(cq, cmd.cqe, &udata); 1562 if (ret) 1563 goto out; 1564 1565 resp.cqe = cq->cqe; 1566 1567 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1568 &resp, sizeof resp.cqe)) 1569 ret = -EFAULT; 1570 1571 out: 1572 put_cq_read(cq); 1573 1574 return ret ? ret : in_len; 1575 } 1576 1577 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc) 1578 { 1579 struct ib_uverbs_wc tmp; 1580 1581 tmp.wr_id = wc->wr_id; 1582 tmp.status = wc->status; 1583 tmp.opcode = wc->opcode; 1584 tmp.vendor_err = wc->vendor_err; 1585 tmp.byte_len = wc->byte_len; 1586 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data; 1587 tmp.qp_num = wc->qp->qp_num; 1588 tmp.src_qp = wc->src_qp; 1589 tmp.wc_flags = wc->wc_flags; 1590 tmp.pkey_index = wc->pkey_index; 1591 tmp.slid = wc->slid; 1592 tmp.sl = wc->sl; 1593 tmp.dlid_path_bits = wc->dlid_path_bits; 1594 tmp.port_num = wc->port_num; 1595 tmp.reserved = 0; 1596 1597 if (copy_to_user(dest, &tmp, sizeof tmp)) 1598 return -EFAULT; 1599 1600 return 0; 1601 } 1602 1603 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file, 1604 struct ib_device *ib_dev, 1605 const char __user *buf, int in_len, 1606 int out_len) 1607 { 1608 struct ib_uverbs_poll_cq cmd; 1609 struct ib_uverbs_poll_cq_resp resp; 1610 u8 __user *header_ptr; 1611 u8 __user *data_ptr; 1612 struct ib_cq *cq; 1613 struct ib_wc wc; 1614 int ret; 1615 1616 if (copy_from_user(&cmd, buf, sizeof cmd)) 1617 return -EFAULT; 1618 1619 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); 1620 if (!cq) 1621 return -EINVAL; 1622 1623 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1624 header_ptr = (void __user *)(unsigned long) cmd.response; 1625 data_ptr = header_ptr + sizeof resp; 1626 1627 memset(&resp, 0, sizeof resp); 1628 while (resp.count < cmd.ne) { 1629 ret = ib_poll_cq(cq, 1, &wc); 1630 if (ret < 0) 1631 goto out_put; 1632 if (!ret) 1633 break; 1634 1635 ret = copy_wc_to_user(data_ptr, &wc); 1636 if (ret) 1637 goto out_put; 1638 1639 data_ptr += sizeof(struct ib_uverbs_wc); 1640 ++resp.count; 1641 } 1642 1643 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1644 ret = -EFAULT; 1645 goto out_put; 1646 } 1647 1648 ret = in_len; 1649 1650 out_put: 1651 put_cq_read(cq); 1652 return ret; 1653 } 1654 1655 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file, 1656 struct ib_device *ib_dev, 1657 const char __user *buf, int in_len, 1658 int out_len) 1659 { 1660 struct ib_uverbs_req_notify_cq cmd; 1661 struct ib_cq *cq; 1662 1663 if (copy_from_user(&cmd, buf, sizeof cmd)) 1664 return -EFAULT; 1665 1666 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); 1667 if (!cq) 1668 return -EINVAL; 1669 1670 ib_req_notify_cq(cq, cmd.solicited_only ? 1671 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1672 1673 put_cq_read(cq); 1674 1675 return in_len; 1676 } 1677 1678 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file, 1679 struct ib_device *ib_dev, 1680 const char __user *buf, int in_len, 1681 int out_len) 1682 { 1683 struct ib_uverbs_destroy_cq cmd; 1684 struct ib_uverbs_destroy_cq_resp resp; 1685 struct ib_uobject *uobj; 1686 struct ib_cq *cq; 1687 struct ib_ucq_object *obj; 1688 struct ib_uverbs_event_file *ev_file; 1689 int ret = -EINVAL; 1690 1691 if (copy_from_user(&cmd, buf, sizeof cmd)) 1692 return -EFAULT; 1693 1694 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext); 1695 if (!uobj) 1696 return -EINVAL; 1697 cq = uobj->object; 1698 ev_file = cq->cq_context; 1699 obj = container_of(cq->uobject, struct ib_ucq_object, uobject); 1700 1701 ret = ib_destroy_cq(cq); 1702 if (!ret) 1703 uobj->live = 0; 1704 1705 put_uobj_write(uobj); 1706 1707 if (ret) 1708 return ret; 1709 1710 idr_remove_uobj(&ib_uverbs_cq_idr, uobj); 1711 1712 mutex_lock(&file->mutex); 1713 list_del(&uobj->list); 1714 mutex_unlock(&file->mutex); 1715 1716 ib_uverbs_release_ucq(file, ev_file, obj); 1717 1718 memset(&resp, 0, sizeof resp); 1719 resp.comp_events_reported = obj->comp_events_reported; 1720 resp.async_events_reported = obj->async_events_reported; 1721 1722 put_uobj(uobj); 1723 1724 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1725 &resp, sizeof resp)) 1726 return -EFAULT; 1727 1728 return in_len; 1729 } 1730 1731 static int create_qp(struct ib_uverbs_file *file, 1732 struct ib_udata *ucore, 1733 struct ib_udata *uhw, 1734 struct ib_uverbs_ex_create_qp *cmd, 1735 size_t cmd_sz, 1736 int (*cb)(struct ib_uverbs_file *file, 1737 struct ib_uverbs_ex_create_qp_resp *resp, 1738 struct ib_udata *udata), 1739 void *context) 1740 { 1741 struct ib_uqp_object *obj; 1742 struct ib_device *device; 1743 struct ib_pd *pd = NULL; 1744 struct ib_xrcd *xrcd = NULL; 1745 struct ib_uobject *uninitialized_var(xrcd_uobj); 1746 struct ib_cq *scq = NULL, *rcq = NULL; 1747 struct ib_srq *srq = NULL; 1748 struct ib_qp *qp; 1749 char *buf; 1750 struct ib_qp_init_attr attr; 1751 struct ib_uverbs_ex_create_qp_resp resp; 1752 int ret; 1753 1754 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW)) 1755 return -EPERM; 1756 1757 obj = kzalloc(sizeof *obj, GFP_KERNEL); 1758 if (!obj) 1759 return -ENOMEM; 1760 1761 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, 1762 &qp_lock_class); 1763 down_write(&obj->uevent.uobject.mutex); 1764 1765 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1766 xrcd = idr_read_xrcd(cmd->pd_handle, file->ucontext, 1767 &xrcd_uobj); 1768 if (!xrcd) { 1769 ret = -EINVAL; 1770 goto err_put; 1771 } 1772 device = xrcd->device; 1773 } else { 1774 if (cmd->qp_type == IB_QPT_XRC_INI) { 1775 cmd->max_recv_wr = 0; 1776 cmd->max_recv_sge = 0; 1777 } else { 1778 if (cmd->is_srq) { 1779 srq = idr_read_srq(cmd->srq_handle, 1780 file->ucontext); 1781 if (!srq || srq->srq_type != IB_SRQT_BASIC) { 1782 ret = -EINVAL; 1783 goto err_put; 1784 } 1785 } 1786 1787 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1788 rcq = idr_read_cq(cmd->recv_cq_handle, 1789 file->ucontext, 0); 1790 if (!rcq) { 1791 ret = -EINVAL; 1792 goto err_put; 1793 } 1794 } 1795 } 1796 1797 scq = idr_read_cq(cmd->send_cq_handle, file->ucontext, !!rcq); 1798 rcq = rcq ?: scq; 1799 pd = idr_read_pd(cmd->pd_handle, file->ucontext); 1800 if (!pd || !scq) { 1801 ret = -EINVAL; 1802 goto err_put; 1803 } 1804 1805 device = pd->device; 1806 } 1807 1808 attr.event_handler = ib_uverbs_qp_event_handler; 1809 attr.qp_context = file; 1810 attr.send_cq = scq; 1811 attr.recv_cq = rcq; 1812 attr.srq = srq; 1813 attr.xrcd = xrcd; 1814 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1815 IB_SIGNAL_REQ_WR; 1816 attr.qp_type = cmd->qp_type; 1817 attr.create_flags = 0; 1818 1819 attr.cap.max_send_wr = cmd->max_send_wr; 1820 attr.cap.max_recv_wr = cmd->max_recv_wr; 1821 attr.cap.max_send_sge = cmd->max_send_sge; 1822 attr.cap.max_recv_sge = cmd->max_recv_sge; 1823 attr.cap.max_inline_data = cmd->max_inline_data; 1824 1825 obj->uevent.events_reported = 0; 1826 INIT_LIST_HEAD(&obj->uevent.event_list); 1827 INIT_LIST_HEAD(&obj->mcast_list); 1828 1829 if (cmd_sz >= offsetof(typeof(*cmd), create_flags) + 1830 sizeof(cmd->create_flags)) 1831 attr.create_flags = cmd->create_flags; 1832 1833 if (attr.create_flags & ~IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) { 1834 ret = -EINVAL; 1835 goto err_put; 1836 } 1837 1838 buf = (void *)cmd + sizeof(*cmd); 1839 if (cmd_sz > sizeof(*cmd)) 1840 if (!(buf[0] == 0 && !memcmp(buf, buf + 1, 1841 cmd_sz - sizeof(*cmd) - 1))) { 1842 ret = -EINVAL; 1843 goto err_put; 1844 } 1845 1846 if (cmd->qp_type == IB_QPT_XRC_TGT) 1847 qp = ib_create_qp(pd, &attr); 1848 else 1849 qp = device->create_qp(pd, &attr, uhw); 1850 1851 if (IS_ERR(qp)) { 1852 ret = PTR_ERR(qp); 1853 goto err_put; 1854 } 1855 1856 if (cmd->qp_type != IB_QPT_XRC_TGT) { 1857 qp->real_qp = qp; 1858 qp->device = device; 1859 qp->pd = pd; 1860 qp->send_cq = attr.send_cq; 1861 qp->recv_cq = attr.recv_cq; 1862 qp->srq = attr.srq; 1863 qp->event_handler = attr.event_handler; 1864 qp->qp_context = attr.qp_context; 1865 qp->qp_type = attr.qp_type; 1866 atomic_set(&qp->usecnt, 0); 1867 atomic_inc(&pd->usecnt); 1868 atomic_inc(&attr.send_cq->usecnt); 1869 if (attr.recv_cq) 1870 atomic_inc(&attr.recv_cq->usecnt); 1871 if (attr.srq) 1872 atomic_inc(&attr.srq->usecnt); 1873 } 1874 qp->uobject = &obj->uevent.uobject; 1875 1876 obj->uevent.uobject.object = qp; 1877 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 1878 if (ret) 1879 goto err_destroy; 1880 1881 memset(&resp, 0, sizeof resp); 1882 resp.base.qpn = qp->qp_num; 1883 resp.base.qp_handle = obj->uevent.uobject.id; 1884 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1885 resp.base.max_send_sge = attr.cap.max_send_sge; 1886 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1887 resp.base.max_send_wr = attr.cap.max_send_wr; 1888 resp.base.max_inline_data = attr.cap.max_inline_data; 1889 1890 resp.response_length = offsetof(typeof(resp), response_length) + 1891 sizeof(resp.response_length); 1892 1893 ret = cb(file, &resp, ucore); 1894 if (ret) 1895 goto err_cb; 1896 1897 if (xrcd) { 1898 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1899 uobject); 1900 atomic_inc(&obj->uxrcd->refcnt); 1901 put_xrcd_read(xrcd_uobj); 1902 } 1903 1904 if (pd) 1905 put_pd_read(pd); 1906 if (scq) 1907 put_cq_read(scq); 1908 if (rcq && rcq != scq) 1909 put_cq_read(rcq); 1910 if (srq) 1911 put_srq_read(srq); 1912 1913 mutex_lock(&file->mutex); 1914 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); 1915 mutex_unlock(&file->mutex); 1916 1917 obj->uevent.uobject.live = 1; 1918 1919 up_write(&obj->uevent.uobject.mutex); 1920 1921 return 0; 1922 err_cb: 1923 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 1924 1925 err_destroy: 1926 ib_destroy_qp(qp); 1927 1928 err_put: 1929 if (xrcd) 1930 put_xrcd_read(xrcd_uobj); 1931 if (pd) 1932 put_pd_read(pd); 1933 if (scq) 1934 put_cq_read(scq); 1935 if (rcq && rcq != scq) 1936 put_cq_read(rcq); 1937 if (srq) 1938 put_srq_read(srq); 1939 1940 put_uobj_write(&obj->uevent.uobject); 1941 return ret; 1942 } 1943 1944 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file, 1945 struct ib_uverbs_ex_create_qp_resp *resp, 1946 struct ib_udata *ucore) 1947 { 1948 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base))) 1949 return -EFAULT; 1950 1951 return 0; 1952 } 1953 1954 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file, 1955 struct ib_device *ib_dev, 1956 const char __user *buf, int in_len, 1957 int out_len) 1958 { 1959 struct ib_uverbs_create_qp cmd; 1960 struct ib_uverbs_ex_create_qp cmd_ex; 1961 struct ib_udata ucore; 1962 struct ib_udata uhw; 1963 ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp); 1964 int err; 1965 1966 if (out_len < resp_size) 1967 return -ENOSPC; 1968 1969 if (copy_from_user(&cmd, buf, sizeof(cmd))) 1970 return -EFAULT; 1971 1972 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), 1973 resp_size); 1974 INIT_UDATA(&uhw, buf + sizeof(cmd), 1975 (unsigned long)cmd.response + resp_size, 1976 in_len - sizeof(cmd), out_len - resp_size); 1977 1978 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1979 cmd_ex.user_handle = cmd.user_handle; 1980 cmd_ex.pd_handle = cmd.pd_handle; 1981 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1982 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1983 cmd_ex.srq_handle = cmd.srq_handle; 1984 cmd_ex.max_send_wr = cmd.max_send_wr; 1985 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1986 cmd_ex.max_send_sge = cmd.max_send_sge; 1987 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1988 cmd_ex.max_inline_data = cmd.max_inline_data; 1989 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1990 cmd_ex.qp_type = cmd.qp_type; 1991 cmd_ex.is_srq = cmd.is_srq; 1992 1993 err = create_qp(file, &ucore, &uhw, &cmd_ex, 1994 offsetof(typeof(cmd_ex), is_srq) + 1995 sizeof(cmd.is_srq), ib_uverbs_create_qp_cb, 1996 NULL); 1997 1998 if (err) 1999 return err; 2000 2001 return in_len; 2002 } 2003 2004 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file, 2005 struct ib_uverbs_ex_create_qp_resp *resp, 2006 struct ib_udata *ucore) 2007 { 2008 if (ib_copy_to_udata(ucore, resp, resp->response_length)) 2009 return -EFAULT; 2010 2011 return 0; 2012 } 2013 2014 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file, 2015 struct ib_device *ib_dev, 2016 struct ib_udata *ucore, 2017 struct ib_udata *uhw) 2018 { 2019 struct ib_uverbs_ex_create_qp_resp resp; 2020 struct ib_uverbs_ex_create_qp cmd = {0}; 2021 int err; 2022 2023 if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) + 2024 sizeof(cmd.comp_mask))) 2025 return -EINVAL; 2026 2027 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen)); 2028 if (err) 2029 return err; 2030 2031 if (cmd.comp_mask) 2032 return -EINVAL; 2033 2034 if (cmd.reserved) 2035 return -EINVAL; 2036 2037 if (ucore->outlen < (offsetof(typeof(resp), response_length) + 2038 sizeof(resp.response_length))) 2039 return -ENOSPC; 2040 2041 err = create_qp(file, ucore, uhw, &cmd, 2042 min(ucore->inlen, sizeof(cmd)), 2043 ib_uverbs_ex_create_qp_cb, NULL); 2044 2045 if (err) 2046 return err; 2047 2048 return 0; 2049 } 2050 2051 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file, 2052 struct ib_device *ib_dev, 2053 const char __user *buf, int in_len, int out_len) 2054 { 2055 struct ib_uverbs_open_qp cmd; 2056 struct ib_uverbs_create_qp_resp resp; 2057 struct ib_udata udata; 2058 struct ib_uqp_object *obj; 2059 struct ib_xrcd *xrcd; 2060 struct ib_uobject *uninitialized_var(xrcd_uobj); 2061 struct ib_qp *qp; 2062 struct ib_qp_open_attr attr; 2063 int ret; 2064 2065 if (out_len < sizeof resp) 2066 return -ENOSPC; 2067 2068 if (copy_from_user(&cmd, buf, sizeof cmd)) 2069 return -EFAULT; 2070 2071 INIT_UDATA(&udata, buf + sizeof cmd, 2072 (unsigned long) cmd.response + sizeof resp, 2073 in_len - sizeof cmd, out_len - sizeof resp); 2074 2075 obj = kmalloc(sizeof *obj, GFP_KERNEL); 2076 if (!obj) 2077 return -ENOMEM; 2078 2079 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class); 2080 down_write(&obj->uevent.uobject.mutex); 2081 2082 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj); 2083 if (!xrcd) { 2084 ret = -EINVAL; 2085 goto err_put; 2086 } 2087 2088 attr.event_handler = ib_uverbs_qp_event_handler; 2089 attr.qp_context = file; 2090 attr.qp_num = cmd.qpn; 2091 attr.qp_type = cmd.qp_type; 2092 2093 obj->uevent.events_reported = 0; 2094 INIT_LIST_HEAD(&obj->uevent.event_list); 2095 INIT_LIST_HEAD(&obj->mcast_list); 2096 2097 qp = ib_open_qp(xrcd, &attr); 2098 if (IS_ERR(qp)) { 2099 ret = PTR_ERR(qp); 2100 goto err_put; 2101 } 2102 2103 qp->uobject = &obj->uevent.uobject; 2104 2105 obj->uevent.uobject.object = qp; 2106 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 2107 if (ret) 2108 goto err_destroy; 2109 2110 memset(&resp, 0, sizeof resp); 2111 resp.qpn = qp->qp_num; 2112 resp.qp_handle = obj->uevent.uobject.id; 2113 2114 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2115 &resp, sizeof resp)) { 2116 ret = -EFAULT; 2117 goto err_remove; 2118 } 2119 2120 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 2121 atomic_inc(&obj->uxrcd->refcnt); 2122 put_xrcd_read(xrcd_uobj); 2123 2124 mutex_lock(&file->mutex); 2125 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); 2126 mutex_unlock(&file->mutex); 2127 2128 obj->uevent.uobject.live = 1; 2129 2130 up_write(&obj->uevent.uobject.mutex); 2131 2132 return in_len; 2133 2134 err_remove: 2135 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 2136 2137 err_destroy: 2138 ib_destroy_qp(qp); 2139 2140 err_put: 2141 put_xrcd_read(xrcd_uobj); 2142 put_uobj_write(&obj->uevent.uobject); 2143 return ret; 2144 } 2145 2146 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file, 2147 struct ib_device *ib_dev, 2148 const char __user *buf, int in_len, 2149 int out_len) 2150 { 2151 struct ib_uverbs_query_qp cmd; 2152 struct ib_uverbs_query_qp_resp resp; 2153 struct ib_qp *qp; 2154 struct ib_qp_attr *attr; 2155 struct ib_qp_init_attr *init_attr; 2156 int ret; 2157 2158 if (copy_from_user(&cmd, buf, sizeof cmd)) 2159 return -EFAULT; 2160 2161 attr = kmalloc(sizeof *attr, GFP_KERNEL); 2162 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 2163 if (!attr || !init_attr) { 2164 ret = -ENOMEM; 2165 goto out; 2166 } 2167 2168 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 2169 if (!qp) { 2170 ret = -EINVAL; 2171 goto out; 2172 } 2173 2174 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 2175 2176 put_qp_read(qp); 2177 2178 if (ret) 2179 goto out; 2180 2181 memset(&resp, 0, sizeof resp); 2182 2183 resp.qp_state = attr->qp_state; 2184 resp.cur_qp_state = attr->cur_qp_state; 2185 resp.path_mtu = attr->path_mtu; 2186 resp.path_mig_state = attr->path_mig_state; 2187 resp.qkey = attr->qkey; 2188 resp.rq_psn = attr->rq_psn; 2189 resp.sq_psn = attr->sq_psn; 2190 resp.dest_qp_num = attr->dest_qp_num; 2191 resp.qp_access_flags = attr->qp_access_flags; 2192 resp.pkey_index = attr->pkey_index; 2193 resp.alt_pkey_index = attr->alt_pkey_index; 2194 resp.sq_draining = attr->sq_draining; 2195 resp.max_rd_atomic = attr->max_rd_atomic; 2196 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 2197 resp.min_rnr_timer = attr->min_rnr_timer; 2198 resp.port_num = attr->port_num; 2199 resp.timeout = attr->timeout; 2200 resp.retry_cnt = attr->retry_cnt; 2201 resp.rnr_retry = attr->rnr_retry; 2202 resp.alt_port_num = attr->alt_port_num; 2203 resp.alt_timeout = attr->alt_timeout; 2204 2205 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16); 2206 resp.dest.flow_label = attr->ah_attr.grh.flow_label; 2207 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index; 2208 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit; 2209 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class; 2210 resp.dest.dlid = attr->ah_attr.dlid; 2211 resp.dest.sl = attr->ah_attr.sl; 2212 resp.dest.src_path_bits = attr->ah_attr.src_path_bits; 2213 resp.dest.static_rate = attr->ah_attr.static_rate; 2214 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH); 2215 resp.dest.port_num = attr->ah_attr.port_num; 2216 2217 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16); 2218 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label; 2219 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index; 2220 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit; 2221 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class; 2222 resp.alt_dest.dlid = attr->alt_ah_attr.dlid; 2223 resp.alt_dest.sl = attr->alt_ah_attr.sl; 2224 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits; 2225 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate; 2226 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH); 2227 resp.alt_dest.port_num = attr->alt_ah_attr.port_num; 2228 2229 resp.max_send_wr = init_attr->cap.max_send_wr; 2230 resp.max_recv_wr = init_attr->cap.max_recv_wr; 2231 resp.max_send_sge = init_attr->cap.max_send_sge; 2232 resp.max_recv_sge = init_attr->cap.max_recv_sge; 2233 resp.max_inline_data = init_attr->cap.max_inline_data; 2234 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 2235 2236 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2237 &resp, sizeof resp)) 2238 ret = -EFAULT; 2239 2240 out: 2241 kfree(attr); 2242 kfree(init_attr); 2243 2244 return ret ? ret : in_len; 2245 } 2246 2247 /* Remove ignored fields set in the attribute mask */ 2248 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 2249 { 2250 switch (qp_type) { 2251 case IB_QPT_XRC_INI: 2252 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 2253 case IB_QPT_XRC_TGT: 2254 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 2255 IB_QP_RNR_RETRY); 2256 default: 2257 return mask; 2258 } 2259 } 2260 2261 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file, 2262 struct ib_device *ib_dev, 2263 const char __user *buf, int in_len, 2264 int out_len) 2265 { 2266 struct ib_uverbs_modify_qp cmd; 2267 struct ib_udata udata; 2268 struct ib_qp *qp; 2269 struct ib_qp_attr *attr; 2270 int ret; 2271 2272 if (copy_from_user(&cmd, buf, sizeof cmd)) 2273 return -EFAULT; 2274 2275 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, 2276 out_len); 2277 2278 attr = kmalloc(sizeof *attr, GFP_KERNEL); 2279 if (!attr) 2280 return -ENOMEM; 2281 2282 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 2283 if (!qp) { 2284 ret = -EINVAL; 2285 goto out; 2286 } 2287 2288 attr->qp_state = cmd.qp_state; 2289 attr->cur_qp_state = cmd.cur_qp_state; 2290 attr->path_mtu = cmd.path_mtu; 2291 attr->path_mig_state = cmd.path_mig_state; 2292 attr->qkey = cmd.qkey; 2293 attr->rq_psn = cmd.rq_psn; 2294 attr->sq_psn = cmd.sq_psn; 2295 attr->dest_qp_num = cmd.dest_qp_num; 2296 attr->qp_access_flags = cmd.qp_access_flags; 2297 attr->pkey_index = cmd.pkey_index; 2298 attr->alt_pkey_index = cmd.alt_pkey_index; 2299 attr->en_sqd_async_notify = cmd.en_sqd_async_notify; 2300 attr->max_rd_atomic = cmd.max_rd_atomic; 2301 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic; 2302 attr->min_rnr_timer = cmd.min_rnr_timer; 2303 attr->port_num = cmd.port_num; 2304 attr->timeout = cmd.timeout; 2305 attr->retry_cnt = cmd.retry_cnt; 2306 attr->rnr_retry = cmd.rnr_retry; 2307 attr->alt_port_num = cmd.alt_port_num; 2308 attr->alt_timeout = cmd.alt_timeout; 2309 2310 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16); 2311 attr->ah_attr.grh.flow_label = cmd.dest.flow_label; 2312 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index; 2313 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit; 2314 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class; 2315 attr->ah_attr.dlid = cmd.dest.dlid; 2316 attr->ah_attr.sl = cmd.dest.sl; 2317 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits; 2318 attr->ah_attr.static_rate = cmd.dest.static_rate; 2319 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0; 2320 attr->ah_attr.port_num = cmd.dest.port_num; 2321 2322 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16); 2323 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label; 2324 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index; 2325 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit; 2326 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class; 2327 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid; 2328 attr->alt_ah_attr.sl = cmd.alt_dest.sl; 2329 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits; 2330 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate; 2331 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0; 2332 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num; 2333 2334 if (qp->real_qp == qp) { 2335 ret = ib_resolve_eth_dmac(qp, attr, &cmd.attr_mask); 2336 if (ret) 2337 goto release_qp; 2338 ret = qp->device->modify_qp(qp, attr, 2339 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata); 2340 } else { 2341 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask)); 2342 } 2343 2344 if (ret) 2345 goto release_qp; 2346 2347 ret = in_len; 2348 2349 release_qp: 2350 put_qp_read(qp); 2351 2352 out: 2353 kfree(attr); 2354 2355 return ret; 2356 } 2357 2358 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file, 2359 struct ib_device *ib_dev, 2360 const char __user *buf, int in_len, 2361 int out_len) 2362 { 2363 struct ib_uverbs_destroy_qp cmd; 2364 struct ib_uverbs_destroy_qp_resp resp; 2365 struct ib_uobject *uobj; 2366 struct ib_qp *qp; 2367 struct ib_uqp_object *obj; 2368 int ret = -EINVAL; 2369 2370 if (copy_from_user(&cmd, buf, sizeof cmd)) 2371 return -EFAULT; 2372 2373 memset(&resp, 0, sizeof resp); 2374 2375 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext); 2376 if (!uobj) 2377 return -EINVAL; 2378 qp = uobj->object; 2379 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 2380 2381 if (!list_empty(&obj->mcast_list)) { 2382 put_uobj_write(uobj); 2383 return -EBUSY; 2384 } 2385 2386 ret = ib_destroy_qp(qp); 2387 if (!ret) 2388 uobj->live = 0; 2389 2390 put_uobj_write(uobj); 2391 2392 if (ret) 2393 return ret; 2394 2395 if (obj->uxrcd) 2396 atomic_dec(&obj->uxrcd->refcnt); 2397 2398 idr_remove_uobj(&ib_uverbs_qp_idr, uobj); 2399 2400 mutex_lock(&file->mutex); 2401 list_del(&uobj->list); 2402 mutex_unlock(&file->mutex); 2403 2404 ib_uverbs_release_uevent(file, &obj->uevent); 2405 2406 resp.events_reported = obj->uevent.events_reported; 2407 2408 put_uobj(uobj); 2409 2410 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2411 &resp, sizeof resp)) 2412 return -EFAULT; 2413 2414 return in_len; 2415 } 2416 2417 static void *alloc_wr(size_t wr_size, __u32 num_sge) 2418 { 2419 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) + 2420 num_sge * sizeof (struct ib_sge), GFP_KERNEL); 2421 }; 2422 2423 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, 2424 struct ib_device *ib_dev, 2425 const char __user *buf, int in_len, 2426 int out_len) 2427 { 2428 struct ib_uverbs_post_send cmd; 2429 struct ib_uverbs_post_send_resp resp; 2430 struct ib_uverbs_send_wr *user_wr; 2431 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr; 2432 struct ib_qp *qp; 2433 int i, sg_ind; 2434 int is_ud; 2435 ssize_t ret = -EINVAL; 2436 size_t next_size; 2437 2438 if (copy_from_user(&cmd, buf, sizeof cmd)) 2439 return -EFAULT; 2440 2441 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count + 2442 cmd.sge_count * sizeof (struct ib_uverbs_sge)) 2443 return -EINVAL; 2444 2445 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr)) 2446 return -EINVAL; 2447 2448 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2449 if (!user_wr) 2450 return -ENOMEM; 2451 2452 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 2453 if (!qp) 2454 goto out; 2455 2456 is_ud = qp->qp_type == IB_QPT_UD; 2457 sg_ind = 0; 2458 last = NULL; 2459 for (i = 0; i < cmd.wr_count; ++i) { 2460 if (copy_from_user(user_wr, 2461 buf + sizeof cmd + i * cmd.wqe_size, 2462 cmd.wqe_size)) { 2463 ret = -EFAULT; 2464 goto out_put; 2465 } 2466 2467 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2468 ret = -EINVAL; 2469 goto out_put; 2470 } 2471 2472 if (is_ud) { 2473 struct ib_ud_wr *ud; 2474 2475 if (user_wr->opcode != IB_WR_SEND && 2476 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2477 ret = -EINVAL; 2478 goto out_put; 2479 } 2480 2481 next_size = sizeof(*ud); 2482 ud = alloc_wr(next_size, user_wr->num_sge); 2483 if (!ud) { 2484 ret = -ENOMEM; 2485 goto out_put; 2486 } 2487 2488 ud->ah = idr_read_ah(user_wr->wr.ud.ah, file->ucontext); 2489 if (!ud->ah) { 2490 kfree(ud); 2491 ret = -EINVAL; 2492 goto out_put; 2493 } 2494 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2495 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2496 2497 next = &ud->wr; 2498 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2499 user_wr->opcode == IB_WR_RDMA_WRITE || 2500 user_wr->opcode == IB_WR_RDMA_READ) { 2501 struct ib_rdma_wr *rdma; 2502 2503 next_size = sizeof(*rdma); 2504 rdma = alloc_wr(next_size, user_wr->num_sge); 2505 if (!rdma) { 2506 ret = -ENOMEM; 2507 goto out_put; 2508 } 2509 2510 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2511 rdma->rkey = user_wr->wr.rdma.rkey; 2512 2513 next = &rdma->wr; 2514 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2515 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2516 struct ib_atomic_wr *atomic; 2517 2518 next_size = sizeof(*atomic); 2519 atomic = alloc_wr(next_size, user_wr->num_sge); 2520 if (!atomic) { 2521 ret = -ENOMEM; 2522 goto out_put; 2523 } 2524 2525 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2526 atomic->compare_add = user_wr->wr.atomic.compare_add; 2527 atomic->swap = user_wr->wr.atomic.swap; 2528 atomic->rkey = user_wr->wr.atomic.rkey; 2529 2530 next = &atomic->wr; 2531 } else if (user_wr->opcode == IB_WR_SEND || 2532 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2533 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2534 next_size = sizeof(*next); 2535 next = alloc_wr(next_size, user_wr->num_sge); 2536 if (!next) { 2537 ret = -ENOMEM; 2538 goto out_put; 2539 } 2540 } else { 2541 ret = -EINVAL; 2542 goto out_put; 2543 } 2544 2545 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2546 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2547 next->ex.imm_data = 2548 (__be32 __force) user_wr->ex.imm_data; 2549 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2550 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2551 } 2552 2553 if (!last) 2554 wr = next; 2555 else 2556 last->next = next; 2557 last = next; 2558 2559 next->next = NULL; 2560 next->wr_id = user_wr->wr_id; 2561 next->num_sge = user_wr->num_sge; 2562 next->opcode = user_wr->opcode; 2563 next->send_flags = user_wr->send_flags; 2564 2565 if (next->num_sge) { 2566 next->sg_list = (void *) next + 2567 ALIGN(next_size, sizeof(struct ib_sge)); 2568 if (copy_from_user(next->sg_list, 2569 buf + sizeof cmd + 2570 cmd.wr_count * cmd.wqe_size + 2571 sg_ind * sizeof (struct ib_sge), 2572 next->num_sge * sizeof (struct ib_sge))) { 2573 ret = -EFAULT; 2574 goto out_put; 2575 } 2576 sg_ind += next->num_sge; 2577 } else 2578 next->sg_list = NULL; 2579 } 2580 2581 resp.bad_wr = 0; 2582 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr); 2583 if (ret) 2584 for (next = wr; next; next = next->next) { 2585 ++resp.bad_wr; 2586 if (next == bad_wr) 2587 break; 2588 } 2589 2590 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2591 &resp, sizeof resp)) 2592 ret = -EFAULT; 2593 2594 out_put: 2595 put_qp_read(qp); 2596 2597 while (wr) { 2598 if (is_ud && ud_wr(wr)->ah) 2599 put_ah_read(ud_wr(wr)->ah); 2600 next = wr->next; 2601 kfree(wr); 2602 wr = next; 2603 } 2604 2605 out: 2606 kfree(user_wr); 2607 2608 return ret ? ret : in_len; 2609 } 2610 2611 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf, 2612 int in_len, 2613 u32 wr_count, 2614 u32 sge_count, 2615 u32 wqe_size) 2616 { 2617 struct ib_uverbs_recv_wr *user_wr; 2618 struct ib_recv_wr *wr = NULL, *last, *next; 2619 int sg_ind; 2620 int i; 2621 int ret; 2622 2623 if (in_len < wqe_size * wr_count + 2624 sge_count * sizeof (struct ib_uverbs_sge)) 2625 return ERR_PTR(-EINVAL); 2626 2627 if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) 2628 return ERR_PTR(-EINVAL); 2629 2630 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2631 if (!user_wr) 2632 return ERR_PTR(-ENOMEM); 2633 2634 sg_ind = 0; 2635 last = NULL; 2636 for (i = 0; i < wr_count; ++i) { 2637 if (copy_from_user(user_wr, buf + i * wqe_size, 2638 wqe_size)) { 2639 ret = -EFAULT; 2640 goto err; 2641 } 2642 2643 if (user_wr->num_sge + sg_ind > sge_count) { 2644 ret = -EINVAL; 2645 goto err; 2646 } 2647 2648 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + 2649 user_wr->num_sge * sizeof (struct ib_sge), 2650 GFP_KERNEL); 2651 if (!next) { 2652 ret = -ENOMEM; 2653 goto err; 2654 } 2655 2656 if (!last) 2657 wr = next; 2658 else 2659 last->next = next; 2660 last = next; 2661 2662 next->next = NULL; 2663 next->wr_id = user_wr->wr_id; 2664 next->num_sge = user_wr->num_sge; 2665 2666 if (next->num_sge) { 2667 next->sg_list = (void *) next + 2668 ALIGN(sizeof *next, sizeof (struct ib_sge)); 2669 if (copy_from_user(next->sg_list, 2670 buf + wr_count * wqe_size + 2671 sg_ind * sizeof (struct ib_sge), 2672 next->num_sge * sizeof (struct ib_sge))) { 2673 ret = -EFAULT; 2674 goto err; 2675 } 2676 sg_ind += next->num_sge; 2677 } else 2678 next->sg_list = NULL; 2679 } 2680 2681 kfree(user_wr); 2682 return wr; 2683 2684 err: 2685 kfree(user_wr); 2686 2687 while (wr) { 2688 next = wr->next; 2689 kfree(wr); 2690 wr = next; 2691 } 2692 2693 return ERR_PTR(ret); 2694 } 2695 2696 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file, 2697 struct ib_device *ib_dev, 2698 const char __user *buf, int in_len, 2699 int out_len) 2700 { 2701 struct ib_uverbs_post_recv cmd; 2702 struct ib_uverbs_post_recv_resp resp; 2703 struct ib_recv_wr *wr, *next, *bad_wr; 2704 struct ib_qp *qp; 2705 ssize_t ret = -EINVAL; 2706 2707 if (copy_from_user(&cmd, buf, sizeof cmd)) 2708 return -EFAULT; 2709 2710 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, 2711 in_len - sizeof cmd, cmd.wr_count, 2712 cmd.sge_count, cmd.wqe_size); 2713 if (IS_ERR(wr)) 2714 return PTR_ERR(wr); 2715 2716 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 2717 if (!qp) 2718 goto out; 2719 2720 resp.bad_wr = 0; 2721 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr); 2722 2723 put_qp_read(qp); 2724 2725 if (ret) 2726 for (next = wr; next; next = next->next) { 2727 ++resp.bad_wr; 2728 if (next == bad_wr) 2729 break; 2730 } 2731 2732 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2733 &resp, sizeof resp)) 2734 ret = -EFAULT; 2735 2736 out: 2737 while (wr) { 2738 next = wr->next; 2739 kfree(wr); 2740 wr = next; 2741 } 2742 2743 return ret ? ret : in_len; 2744 } 2745 2746 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file, 2747 struct ib_device *ib_dev, 2748 const char __user *buf, int in_len, 2749 int out_len) 2750 { 2751 struct ib_uverbs_post_srq_recv cmd; 2752 struct ib_uverbs_post_srq_recv_resp resp; 2753 struct ib_recv_wr *wr, *next, *bad_wr; 2754 struct ib_srq *srq; 2755 ssize_t ret = -EINVAL; 2756 2757 if (copy_from_user(&cmd, buf, sizeof cmd)) 2758 return -EFAULT; 2759 2760 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, 2761 in_len - sizeof cmd, cmd.wr_count, 2762 cmd.sge_count, cmd.wqe_size); 2763 if (IS_ERR(wr)) 2764 return PTR_ERR(wr); 2765 2766 srq = idr_read_srq(cmd.srq_handle, file->ucontext); 2767 if (!srq) 2768 goto out; 2769 2770 resp.bad_wr = 0; 2771 ret = srq->device->post_srq_recv(srq, wr, &bad_wr); 2772 2773 put_srq_read(srq); 2774 2775 if (ret) 2776 for (next = wr; next; next = next->next) { 2777 ++resp.bad_wr; 2778 if (next == bad_wr) 2779 break; 2780 } 2781 2782 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2783 &resp, sizeof resp)) 2784 ret = -EFAULT; 2785 2786 out: 2787 while (wr) { 2788 next = wr->next; 2789 kfree(wr); 2790 wr = next; 2791 } 2792 2793 return ret ? ret : in_len; 2794 } 2795 2796 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file, 2797 struct ib_device *ib_dev, 2798 const char __user *buf, int in_len, 2799 int out_len) 2800 { 2801 struct ib_uverbs_create_ah cmd; 2802 struct ib_uverbs_create_ah_resp resp; 2803 struct ib_uobject *uobj; 2804 struct ib_pd *pd; 2805 struct ib_ah *ah; 2806 struct ib_ah_attr attr; 2807 int ret; 2808 2809 if (out_len < sizeof resp) 2810 return -ENOSPC; 2811 2812 if (copy_from_user(&cmd, buf, sizeof cmd)) 2813 return -EFAULT; 2814 2815 uobj = kmalloc(sizeof *uobj, GFP_KERNEL); 2816 if (!uobj) 2817 return -ENOMEM; 2818 2819 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class); 2820 down_write(&uobj->mutex); 2821 2822 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 2823 if (!pd) { 2824 ret = -EINVAL; 2825 goto err; 2826 } 2827 2828 attr.dlid = cmd.attr.dlid; 2829 attr.sl = cmd.attr.sl; 2830 attr.src_path_bits = cmd.attr.src_path_bits; 2831 attr.static_rate = cmd.attr.static_rate; 2832 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0; 2833 attr.port_num = cmd.attr.port_num; 2834 attr.grh.flow_label = cmd.attr.grh.flow_label; 2835 attr.grh.sgid_index = cmd.attr.grh.sgid_index; 2836 attr.grh.hop_limit = cmd.attr.grh.hop_limit; 2837 attr.grh.traffic_class = cmd.attr.grh.traffic_class; 2838 memset(&attr.dmac, 0, sizeof(attr.dmac)); 2839 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16); 2840 2841 ah = ib_create_ah(pd, &attr); 2842 if (IS_ERR(ah)) { 2843 ret = PTR_ERR(ah); 2844 goto err_put; 2845 } 2846 2847 ah->uobject = uobj; 2848 uobj->object = ah; 2849 2850 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj); 2851 if (ret) 2852 goto err_destroy; 2853 2854 resp.ah_handle = uobj->id; 2855 2856 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2857 &resp, sizeof resp)) { 2858 ret = -EFAULT; 2859 goto err_copy; 2860 } 2861 2862 put_pd_read(pd); 2863 2864 mutex_lock(&file->mutex); 2865 list_add_tail(&uobj->list, &file->ucontext->ah_list); 2866 mutex_unlock(&file->mutex); 2867 2868 uobj->live = 1; 2869 2870 up_write(&uobj->mutex); 2871 2872 return in_len; 2873 2874 err_copy: 2875 idr_remove_uobj(&ib_uverbs_ah_idr, uobj); 2876 2877 err_destroy: 2878 ib_destroy_ah(ah); 2879 2880 err_put: 2881 put_pd_read(pd); 2882 2883 err: 2884 put_uobj_write(uobj); 2885 return ret; 2886 } 2887 2888 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file, 2889 struct ib_device *ib_dev, 2890 const char __user *buf, int in_len, int out_len) 2891 { 2892 struct ib_uverbs_destroy_ah cmd; 2893 struct ib_ah *ah; 2894 struct ib_uobject *uobj; 2895 int ret; 2896 2897 if (copy_from_user(&cmd, buf, sizeof cmd)) 2898 return -EFAULT; 2899 2900 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext); 2901 if (!uobj) 2902 return -EINVAL; 2903 ah = uobj->object; 2904 2905 ret = ib_destroy_ah(ah); 2906 if (!ret) 2907 uobj->live = 0; 2908 2909 put_uobj_write(uobj); 2910 2911 if (ret) 2912 return ret; 2913 2914 idr_remove_uobj(&ib_uverbs_ah_idr, uobj); 2915 2916 mutex_lock(&file->mutex); 2917 list_del(&uobj->list); 2918 mutex_unlock(&file->mutex); 2919 2920 put_uobj(uobj); 2921 2922 return in_len; 2923 } 2924 2925 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file, 2926 struct ib_device *ib_dev, 2927 const char __user *buf, int in_len, 2928 int out_len) 2929 { 2930 struct ib_uverbs_attach_mcast cmd; 2931 struct ib_qp *qp; 2932 struct ib_uqp_object *obj; 2933 struct ib_uverbs_mcast_entry *mcast; 2934 int ret; 2935 2936 if (copy_from_user(&cmd, buf, sizeof cmd)) 2937 return -EFAULT; 2938 2939 qp = idr_write_qp(cmd.qp_handle, file->ucontext); 2940 if (!qp) 2941 return -EINVAL; 2942 2943 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); 2944 2945 list_for_each_entry(mcast, &obj->mcast_list, list) 2946 if (cmd.mlid == mcast->lid && 2947 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2948 ret = 0; 2949 goto out_put; 2950 } 2951 2952 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2953 if (!mcast) { 2954 ret = -ENOMEM; 2955 goto out_put; 2956 } 2957 2958 mcast->lid = cmd.mlid; 2959 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2960 2961 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2962 if (!ret) 2963 list_add_tail(&mcast->list, &obj->mcast_list); 2964 else 2965 kfree(mcast); 2966 2967 out_put: 2968 put_qp_write(qp); 2969 2970 return ret ? ret : in_len; 2971 } 2972 2973 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file, 2974 struct ib_device *ib_dev, 2975 const char __user *buf, int in_len, 2976 int out_len) 2977 { 2978 struct ib_uverbs_detach_mcast cmd; 2979 struct ib_uqp_object *obj; 2980 struct ib_qp *qp; 2981 struct ib_uverbs_mcast_entry *mcast; 2982 int ret = -EINVAL; 2983 2984 if (copy_from_user(&cmd, buf, sizeof cmd)) 2985 return -EFAULT; 2986 2987 qp = idr_write_qp(cmd.qp_handle, file->ucontext); 2988 if (!qp) 2989 return -EINVAL; 2990 2991 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid); 2992 if (ret) 2993 goto out_put; 2994 2995 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); 2996 2997 list_for_each_entry(mcast, &obj->mcast_list, list) 2998 if (cmd.mlid == mcast->lid && 2999 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 3000 list_del(&mcast->list); 3001 kfree(mcast); 3002 break; 3003 } 3004 3005 out_put: 3006 put_qp_write(qp); 3007 3008 return ret ? ret : in_len; 3009 } 3010 3011 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec, 3012 union ib_flow_spec *ib_spec) 3013 { 3014 if (kern_spec->reserved) 3015 return -EINVAL; 3016 3017 ib_spec->type = kern_spec->type; 3018 3019 switch (ib_spec->type) { 3020 case IB_FLOW_SPEC_ETH: 3021 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth); 3022 if (ib_spec->eth.size != kern_spec->eth.size) 3023 return -EINVAL; 3024 memcpy(&ib_spec->eth.val, &kern_spec->eth.val, 3025 sizeof(struct ib_flow_eth_filter)); 3026 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask, 3027 sizeof(struct ib_flow_eth_filter)); 3028 break; 3029 case IB_FLOW_SPEC_IPV4: 3030 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4); 3031 if (ib_spec->ipv4.size != kern_spec->ipv4.size) 3032 return -EINVAL; 3033 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val, 3034 sizeof(struct ib_flow_ipv4_filter)); 3035 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask, 3036 sizeof(struct ib_flow_ipv4_filter)); 3037 break; 3038 case IB_FLOW_SPEC_TCP: 3039 case IB_FLOW_SPEC_UDP: 3040 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp); 3041 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size) 3042 return -EINVAL; 3043 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val, 3044 sizeof(struct ib_flow_tcp_udp_filter)); 3045 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask, 3046 sizeof(struct ib_flow_tcp_udp_filter)); 3047 break; 3048 default: 3049 return -EINVAL; 3050 } 3051 return 0; 3052 } 3053 3054 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file, 3055 struct ib_device *ib_dev, 3056 struct ib_udata *ucore, 3057 struct ib_udata *uhw) 3058 { 3059 struct ib_uverbs_create_flow cmd; 3060 struct ib_uverbs_create_flow_resp resp; 3061 struct ib_uobject *uobj; 3062 struct ib_flow *flow_id; 3063 struct ib_uverbs_flow_attr *kern_flow_attr; 3064 struct ib_flow_attr *flow_attr; 3065 struct ib_qp *qp; 3066 int err = 0; 3067 void *kern_spec; 3068 void *ib_spec; 3069 int i; 3070 3071 if (ucore->inlen < sizeof(cmd)) 3072 return -EINVAL; 3073 3074 if (ucore->outlen < sizeof(resp)) 3075 return -ENOSPC; 3076 3077 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); 3078 if (err) 3079 return err; 3080 3081 ucore->inbuf += sizeof(cmd); 3082 ucore->inlen -= sizeof(cmd); 3083 3084 if (cmd.comp_mask) 3085 return -EINVAL; 3086 3087 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER && 3088 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW)) 3089 return -EPERM; 3090 3091 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3092 return -EINVAL; 3093 3094 if (cmd.flow_attr.size > ucore->inlen || 3095 cmd.flow_attr.size > 3096 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3097 return -EINVAL; 3098 3099 if (cmd.flow_attr.reserved[0] || 3100 cmd.flow_attr.reserved[1]) 3101 return -EINVAL; 3102 3103 if (cmd.flow_attr.num_of_specs) { 3104 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3105 GFP_KERNEL); 3106 if (!kern_flow_attr) 3107 return -ENOMEM; 3108 3109 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr)); 3110 err = ib_copy_from_udata(kern_flow_attr + 1, ucore, 3111 cmd.flow_attr.size); 3112 if (err) 3113 goto err_free_attr; 3114 } else { 3115 kern_flow_attr = &cmd.flow_attr; 3116 } 3117 3118 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); 3119 if (!uobj) { 3120 err = -ENOMEM; 3121 goto err_free_attr; 3122 } 3123 init_uobj(uobj, 0, file->ucontext, &rule_lock_class); 3124 down_write(&uobj->mutex); 3125 3126 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 3127 if (!qp) { 3128 err = -EINVAL; 3129 goto err_uobj; 3130 } 3131 3132 flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL); 3133 if (!flow_attr) { 3134 err = -ENOMEM; 3135 goto err_put; 3136 } 3137 3138 flow_attr->type = kern_flow_attr->type; 3139 flow_attr->priority = kern_flow_attr->priority; 3140 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3141 flow_attr->port = kern_flow_attr->port; 3142 flow_attr->flags = kern_flow_attr->flags; 3143 flow_attr->size = sizeof(*flow_attr); 3144 3145 kern_spec = kern_flow_attr + 1; 3146 ib_spec = flow_attr + 1; 3147 for (i = 0; i < flow_attr->num_of_specs && 3148 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) && 3149 cmd.flow_attr.size >= 3150 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) { 3151 err = kern_spec_to_ib_spec(kern_spec, ib_spec); 3152 if (err) 3153 goto err_free; 3154 flow_attr->size += 3155 ((union ib_flow_spec *) ib_spec)->size; 3156 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size; 3157 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size; 3158 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3159 } 3160 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3161 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n", 3162 i, cmd.flow_attr.size); 3163 err = -EINVAL; 3164 goto err_free; 3165 } 3166 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER); 3167 if (IS_ERR(flow_id)) { 3168 err = PTR_ERR(flow_id); 3169 goto err_free; 3170 } 3171 flow_id->qp = qp; 3172 flow_id->uobject = uobj; 3173 uobj->object = flow_id; 3174 3175 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj); 3176 if (err) 3177 goto destroy_flow; 3178 3179 memset(&resp, 0, sizeof(resp)); 3180 resp.flow_handle = uobj->id; 3181 3182 err = ib_copy_to_udata(ucore, 3183 &resp, sizeof(resp)); 3184 if (err) 3185 goto err_copy; 3186 3187 put_qp_read(qp); 3188 mutex_lock(&file->mutex); 3189 list_add_tail(&uobj->list, &file->ucontext->rule_list); 3190 mutex_unlock(&file->mutex); 3191 3192 uobj->live = 1; 3193 3194 up_write(&uobj->mutex); 3195 kfree(flow_attr); 3196 if (cmd.flow_attr.num_of_specs) 3197 kfree(kern_flow_attr); 3198 return 0; 3199 err_copy: 3200 idr_remove_uobj(&ib_uverbs_rule_idr, uobj); 3201 destroy_flow: 3202 ib_destroy_flow(flow_id); 3203 err_free: 3204 kfree(flow_attr); 3205 err_put: 3206 put_qp_read(qp); 3207 err_uobj: 3208 put_uobj_write(uobj); 3209 err_free_attr: 3210 if (cmd.flow_attr.num_of_specs) 3211 kfree(kern_flow_attr); 3212 return err; 3213 } 3214 3215 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file, 3216 struct ib_device *ib_dev, 3217 struct ib_udata *ucore, 3218 struct ib_udata *uhw) 3219 { 3220 struct ib_uverbs_destroy_flow cmd; 3221 struct ib_flow *flow_id; 3222 struct ib_uobject *uobj; 3223 int ret; 3224 3225 if (ucore->inlen < sizeof(cmd)) 3226 return -EINVAL; 3227 3228 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); 3229 if (ret) 3230 return ret; 3231 3232 if (cmd.comp_mask) 3233 return -EINVAL; 3234 3235 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle, 3236 file->ucontext); 3237 if (!uobj) 3238 return -EINVAL; 3239 flow_id = uobj->object; 3240 3241 ret = ib_destroy_flow(flow_id); 3242 if (!ret) 3243 uobj->live = 0; 3244 3245 put_uobj_write(uobj); 3246 3247 idr_remove_uobj(&ib_uverbs_rule_idr, uobj); 3248 3249 mutex_lock(&file->mutex); 3250 list_del(&uobj->list); 3251 mutex_unlock(&file->mutex); 3252 3253 put_uobj(uobj); 3254 3255 return ret; 3256 } 3257 3258 static int __uverbs_create_xsrq(struct ib_uverbs_file *file, 3259 struct ib_device *ib_dev, 3260 struct ib_uverbs_create_xsrq *cmd, 3261 struct ib_udata *udata) 3262 { 3263 struct ib_uverbs_create_srq_resp resp; 3264 struct ib_usrq_object *obj; 3265 struct ib_pd *pd; 3266 struct ib_srq *srq; 3267 struct ib_uobject *uninitialized_var(xrcd_uobj); 3268 struct ib_srq_init_attr attr; 3269 int ret; 3270 3271 obj = kmalloc(sizeof *obj, GFP_KERNEL); 3272 if (!obj) 3273 return -ENOMEM; 3274 3275 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class); 3276 down_write(&obj->uevent.uobject.mutex); 3277 3278 if (cmd->srq_type == IB_SRQT_XRC) { 3279 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj); 3280 if (!attr.ext.xrc.xrcd) { 3281 ret = -EINVAL; 3282 goto err; 3283 } 3284 3285 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3286 atomic_inc(&obj->uxrcd->refcnt); 3287 3288 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0); 3289 if (!attr.ext.xrc.cq) { 3290 ret = -EINVAL; 3291 goto err_put_xrcd; 3292 } 3293 } 3294 3295 pd = idr_read_pd(cmd->pd_handle, file->ucontext); 3296 if (!pd) { 3297 ret = -EINVAL; 3298 goto err_put_cq; 3299 } 3300 3301 attr.event_handler = ib_uverbs_srq_event_handler; 3302 attr.srq_context = file; 3303 attr.srq_type = cmd->srq_type; 3304 attr.attr.max_wr = cmd->max_wr; 3305 attr.attr.max_sge = cmd->max_sge; 3306 attr.attr.srq_limit = cmd->srq_limit; 3307 3308 obj->uevent.events_reported = 0; 3309 INIT_LIST_HEAD(&obj->uevent.event_list); 3310 3311 srq = pd->device->create_srq(pd, &attr, udata); 3312 if (IS_ERR(srq)) { 3313 ret = PTR_ERR(srq); 3314 goto err_put; 3315 } 3316 3317 srq->device = pd->device; 3318 srq->pd = pd; 3319 srq->srq_type = cmd->srq_type; 3320 srq->uobject = &obj->uevent.uobject; 3321 srq->event_handler = attr.event_handler; 3322 srq->srq_context = attr.srq_context; 3323 3324 if (cmd->srq_type == IB_SRQT_XRC) { 3325 srq->ext.xrc.cq = attr.ext.xrc.cq; 3326 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd; 3327 atomic_inc(&attr.ext.xrc.cq->usecnt); 3328 atomic_inc(&attr.ext.xrc.xrcd->usecnt); 3329 } 3330 3331 atomic_inc(&pd->usecnt); 3332 atomic_set(&srq->usecnt, 0); 3333 3334 obj->uevent.uobject.object = srq; 3335 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject); 3336 if (ret) 3337 goto err_destroy; 3338 3339 memset(&resp, 0, sizeof resp); 3340 resp.srq_handle = obj->uevent.uobject.id; 3341 resp.max_wr = attr.attr.max_wr; 3342 resp.max_sge = attr.attr.max_sge; 3343 if (cmd->srq_type == IB_SRQT_XRC) 3344 resp.srqn = srq->ext.xrc.srq_num; 3345 3346 if (copy_to_user((void __user *) (unsigned long) cmd->response, 3347 &resp, sizeof resp)) { 3348 ret = -EFAULT; 3349 goto err_copy; 3350 } 3351 3352 if (cmd->srq_type == IB_SRQT_XRC) { 3353 put_uobj_read(xrcd_uobj); 3354 put_cq_read(attr.ext.xrc.cq); 3355 } 3356 put_pd_read(pd); 3357 3358 mutex_lock(&file->mutex); 3359 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list); 3360 mutex_unlock(&file->mutex); 3361 3362 obj->uevent.uobject.live = 1; 3363 3364 up_write(&obj->uevent.uobject.mutex); 3365 3366 return 0; 3367 3368 err_copy: 3369 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject); 3370 3371 err_destroy: 3372 ib_destroy_srq(srq); 3373 3374 err_put: 3375 put_pd_read(pd); 3376 3377 err_put_cq: 3378 if (cmd->srq_type == IB_SRQT_XRC) 3379 put_cq_read(attr.ext.xrc.cq); 3380 3381 err_put_xrcd: 3382 if (cmd->srq_type == IB_SRQT_XRC) { 3383 atomic_dec(&obj->uxrcd->refcnt); 3384 put_uobj_read(xrcd_uobj); 3385 } 3386 3387 err: 3388 put_uobj_write(&obj->uevent.uobject); 3389 return ret; 3390 } 3391 3392 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file, 3393 struct ib_device *ib_dev, 3394 const char __user *buf, int in_len, 3395 int out_len) 3396 { 3397 struct ib_uverbs_create_srq cmd; 3398 struct ib_uverbs_create_xsrq xcmd; 3399 struct ib_uverbs_create_srq_resp resp; 3400 struct ib_udata udata; 3401 int ret; 3402 3403 if (out_len < sizeof resp) 3404 return -ENOSPC; 3405 3406 if (copy_from_user(&cmd, buf, sizeof cmd)) 3407 return -EFAULT; 3408 3409 xcmd.response = cmd.response; 3410 xcmd.user_handle = cmd.user_handle; 3411 xcmd.srq_type = IB_SRQT_BASIC; 3412 xcmd.pd_handle = cmd.pd_handle; 3413 xcmd.max_wr = cmd.max_wr; 3414 xcmd.max_sge = cmd.max_sge; 3415 xcmd.srq_limit = cmd.srq_limit; 3416 3417 INIT_UDATA(&udata, buf + sizeof cmd, 3418 (unsigned long) cmd.response + sizeof resp, 3419 in_len - sizeof cmd, out_len - sizeof resp); 3420 3421 ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata); 3422 if (ret) 3423 return ret; 3424 3425 return in_len; 3426 } 3427 3428 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file, 3429 struct ib_device *ib_dev, 3430 const char __user *buf, int in_len, int out_len) 3431 { 3432 struct ib_uverbs_create_xsrq cmd; 3433 struct ib_uverbs_create_srq_resp resp; 3434 struct ib_udata udata; 3435 int ret; 3436 3437 if (out_len < sizeof resp) 3438 return -ENOSPC; 3439 3440 if (copy_from_user(&cmd, buf, sizeof cmd)) 3441 return -EFAULT; 3442 3443 INIT_UDATA(&udata, buf + sizeof cmd, 3444 (unsigned long) cmd.response + sizeof resp, 3445 in_len - sizeof cmd, out_len - sizeof resp); 3446 3447 ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata); 3448 if (ret) 3449 return ret; 3450 3451 return in_len; 3452 } 3453 3454 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file, 3455 struct ib_device *ib_dev, 3456 const char __user *buf, int in_len, 3457 int out_len) 3458 { 3459 struct ib_uverbs_modify_srq cmd; 3460 struct ib_udata udata; 3461 struct ib_srq *srq; 3462 struct ib_srq_attr attr; 3463 int ret; 3464 3465 if (copy_from_user(&cmd, buf, sizeof cmd)) 3466 return -EFAULT; 3467 3468 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, 3469 out_len); 3470 3471 srq = idr_read_srq(cmd.srq_handle, file->ucontext); 3472 if (!srq) 3473 return -EINVAL; 3474 3475 attr.max_wr = cmd.max_wr; 3476 attr.srq_limit = cmd.srq_limit; 3477 3478 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata); 3479 3480 put_srq_read(srq); 3481 3482 return ret ? ret : in_len; 3483 } 3484 3485 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file, 3486 struct ib_device *ib_dev, 3487 const char __user *buf, 3488 int in_len, int out_len) 3489 { 3490 struct ib_uverbs_query_srq cmd; 3491 struct ib_uverbs_query_srq_resp resp; 3492 struct ib_srq_attr attr; 3493 struct ib_srq *srq; 3494 int ret; 3495 3496 if (out_len < sizeof resp) 3497 return -ENOSPC; 3498 3499 if (copy_from_user(&cmd, buf, sizeof cmd)) 3500 return -EFAULT; 3501 3502 srq = idr_read_srq(cmd.srq_handle, file->ucontext); 3503 if (!srq) 3504 return -EINVAL; 3505 3506 ret = ib_query_srq(srq, &attr); 3507 3508 put_srq_read(srq); 3509 3510 if (ret) 3511 return ret; 3512 3513 memset(&resp, 0, sizeof resp); 3514 3515 resp.max_wr = attr.max_wr; 3516 resp.max_sge = attr.max_sge; 3517 resp.srq_limit = attr.srq_limit; 3518 3519 if (copy_to_user((void __user *) (unsigned long) cmd.response, 3520 &resp, sizeof resp)) 3521 return -EFAULT; 3522 3523 return in_len; 3524 } 3525 3526 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file, 3527 struct ib_device *ib_dev, 3528 const char __user *buf, int in_len, 3529 int out_len) 3530 { 3531 struct ib_uverbs_destroy_srq cmd; 3532 struct ib_uverbs_destroy_srq_resp resp; 3533 struct ib_uobject *uobj; 3534 struct ib_srq *srq; 3535 struct ib_uevent_object *obj; 3536 int ret = -EINVAL; 3537 struct ib_usrq_object *us; 3538 enum ib_srq_type srq_type; 3539 3540 if (copy_from_user(&cmd, buf, sizeof cmd)) 3541 return -EFAULT; 3542 3543 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext); 3544 if (!uobj) 3545 return -EINVAL; 3546 srq = uobj->object; 3547 obj = container_of(uobj, struct ib_uevent_object, uobject); 3548 srq_type = srq->srq_type; 3549 3550 ret = ib_destroy_srq(srq); 3551 if (!ret) 3552 uobj->live = 0; 3553 3554 put_uobj_write(uobj); 3555 3556 if (ret) 3557 return ret; 3558 3559 if (srq_type == IB_SRQT_XRC) { 3560 us = container_of(obj, struct ib_usrq_object, uevent); 3561 atomic_dec(&us->uxrcd->refcnt); 3562 } 3563 3564 idr_remove_uobj(&ib_uverbs_srq_idr, uobj); 3565 3566 mutex_lock(&file->mutex); 3567 list_del(&uobj->list); 3568 mutex_unlock(&file->mutex); 3569 3570 ib_uverbs_release_uevent(file, obj); 3571 3572 memset(&resp, 0, sizeof resp); 3573 resp.events_reported = obj->events_reported; 3574 3575 put_uobj(uobj); 3576 3577 if (copy_to_user((void __user *) (unsigned long) cmd.response, 3578 &resp, sizeof resp)) 3579 ret = -EFAULT; 3580 3581 return ret ? ret : in_len; 3582 } 3583 3584 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file, 3585 struct ib_device *ib_dev, 3586 struct ib_udata *ucore, 3587 struct ib_udata *uhw) 3588 { 3589 struct ib_uverbs_ex_query_device_resp resp; 3590 struct ib_uverbs_ex_query_device cmd; 3591 struct ib_device_attr attr; 3592 int err; 3593 3594 if (ucore->inlen < sizeof(cmd)) 3595 return -EINVAL; 3596 3597 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); 3598 if (err) 3599 return err; 3600 3601 if (cmd.comp_mask) 3602 return -EINVAL; 3603 3604 if (cmd.reserved) 3605 return -EINVAL; 3606 3607 resp.response_length = offsetof(typeof(resp), odp_caps); 3608 3609 if (ucore->outlen < resp.response_length) 3610 return -ENOSPC; 3611 3612 memset(&attr, 0, sizeof(attr)); 3613 3614 err = ib_dev->query_device(ib_dev, &attr, uhw); 3615 if (err) 3616 return err; 3617 3618 copy_query_dev_fields(file, ib_dev, &resp.base, &attr); 3619 resp.comp_mask = 0; 3620 3621 if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps)) 3622 goto end; 3623 3624 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING 3625 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3626 resp.odp_caps.per_transport_caps.rc_odp_caps = 3627 attr.odp_caps.per_transport_caps.rc_odp_caps; 3628 resp.odp_caps.per_transport_caps.uc_odp_caps = 3629 attr.odp_caps.per_transport_caps.uc_odp_caps; 3630 resp.odp_caps.per_transport_caps.ud_odp_caps = 3631 attr.odp_caps.per_transport_caps.ud_odp_caps; 3632 resp.odp_caps.reserved = 0; 3633 #else 3634 memset(&resp.odp_caps, 0, sizeof(resp.odp_caps)); 3635 #endif 3636 resp.response_length += sizeof(resp.odp_caps); 3637 3638 if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask)) 3639 goto end; 3640 3641 resp.timestamp_mask = attr.timestamp_mask; 3642 resp.response_length += sizeof(resp.timestamp_mask); 3643 3644 if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock)) 3645 goto end; 3646 3647 resp.hca_core_clock = attr.hca_core_clock; 3648 resp.response_length += sizeof(resp.hca_core_clock); 3649 3650 end: 3651 err = ib_copy_to_udata(ucore, &resp, resp.response_length); 3652 if (err) 3653 return err; 3654 3655 return 0; 3656 } 3657