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 <linux/uaccess.h> 42 43 #include <rdma/uverbs_types.h> 44 #include <rdma/uverbs_std_types.h> 45 #include <rdma/ib_ucaps.h> 46 #include "rdma_core.h" 47 48 #include "uverbs.h" 49 #include "core_priv.h" 50 51 /* 52 * Copy a response to userspace. If the provided 'resp' is larger than the 53 * user buffer it is silently truncated. If the user provided a larger buffer 54 * then the trailing portion is zero filled. 55 * 56 * These semantics are intended to support future extension of the output 57 * structures. 58 */ 59 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp, 60 size_t resp_len) 61 { 62 int ret; 63 64 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 65 return uverbs_copy_to_struct_or_zero( 66 attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len); 67 68 if (copy_to_user(attrs->ucore.outbuf, resp, 69 min(attrs->ucore.outlen, resp_len))) 70 return -EFAULT; 71 72 if (resp_len < attrs->ucore.outlen) { 73 /* 74 * Zero fill any extra memory that user 75 * space might have provided. 76 */ 77 ret = clear_user(attrs->ucore.outbuf + resp_len, 78 attrs->ucore.outlen - resp_len); 79 if (ret) 80 return -EFAULT; 81 } 82 83 return 0; 84 } 85 86 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req, 87 size_t req_len) 88 { 89 int ret; 90 91 ret = copy_struct_from_user(req, req_len, attrs->ucore.inbuf, 92 attrs->ucore.inlen); 93 if (ret == -E2BIG) 94 ret = -EOPNOTSUPP; 95 return ret; 96 } 97 98 /* 99 * Generate the value for the 'response_length' protocol used by write_ex. 100 * This is the number of bytes the kernel actually wrote. Userspace can use 101 * this to detect what structure members in the response the kernel 102 * understood. 103 */ 104 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs, 105 size_t resp_len) 106 { 107 return min_t(size_t, attrs->ucore.outlen, resp_len); 108 } 109 110 /* 111 * The iterator version of the request interface is for handlers that need to 112 * step over a flex array at the end of a command header. 113 */ 114 struct uverbs_req_iter { 115 const void __user *cur; 116 const void __user *end; 117 }; 118 119 static int uverbs_request_start(struct uverbs_attr_bundle *attrs, 120 struct uverbs_req_iter *iter, 121 void *req, 122 size_t req_len) 123 { 124 if (attrs->ucore.inlen < req_len) 125 return -ENOSPC; 126 127 if (copy_from_user(req, attrs->ucore.inbuf, req_len)) 128 return -EFAULT; 129 130 iter->cur = attrs->ucore.inbuf + req_len; 131 iter->end = attrs->ucore.inbuf + attrs->ucore.inlen; 132 return 0; 133 } 134 135 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val, 136 size_t len) 137 { 138 if (iter->cur + len > iter->end) 139 return -ENOSPC; 140 141 if (copy_from_user(val, iter->cur, len)) 142 return -EFAULT; 143 144 iter->cur += len; 145 return 0; 146 } 147 148 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter, 149 size_t len) 150 { 151 const void __user *res = iter->cur; 152 153 if (len > iter->end - iter->cur) 154 return (void __force __user *)ERR_PTR(-ENOSPC); 155 iter->cur += len; 156 return res; 157 } 158 159 static int uverbs_request_finish(struct uverbs_req_iter *iter) 160 { 161 if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur)) 162 return -EOPNOTSUPP; 163 return 0; 164 } 165 166 /* 167 * When calling a destroy function during an error unwind we need to pass in 168 * the udata that is sanitized of all user arguments. Ie from the driver 169 * perspective it looks like no udata was passed. 170 */ 171 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs) 172 { 173 attrs->driver_udata = (struct ib_udata){}; 174 return &attrs->driver_udata; 175 } 176 177 static struct ib_uverbs_completion_event_file * 178 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs) 179 { 180 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL, 181 fd, attrs); 182 183 if (IS_ERR(uobj)) 184 return ERR_CAST(uobj); 185 186 uverbs_uobject_get(uobj); 187 uobj_put_read(uobj); 188 189 return container_of(uobj, struct ib_uverbs_completion_event_file, 190 uobj); 191 } 192 #define ib_uverbs_lookup_comp_file(_fd, _ufile) \ 193 _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile) 194 195 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs) 196 { 197 struct ib_uverbs_file *ufile = attrs->ufile; 198 struct ib_ucontext *ucontext; 199 struct ib_device *ib_dev; 200 201 ib_dev = srcu_dereference(ufile->device->ib_dev, 202 &ufile->device->disassociate_srcu); 203 if (!ib_dev) 204 return -EIO; 205 206 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext); 207 if (!ucontext) 208 return -ENOMEM; 209 210 ucontext->device = ib_dev; 211 ucontext->ufile = ufile; 212 xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC); 213 214 rdma_restrack_new(&ucontext->res, RDMA_RESTRACK_CTX); 215 rdma_restrack_set_name(&ucontext->res, NULL); 216 attrs->context = ucontext; 217 return 0; 218 } 219 220 int ib_init_ucontext(struct uverbs_attr_bundle *attrs) 221 { 222 struct ib_ucontext *ucontext = attrs->context; 223 struct ib_uverbs_file *file = attrs->ufile; 224 int *fd_array; 225 int fd_count; 226 int ret; 227 228 if (!down_read_trylock(&file->hw_destroy_rwsem)) 229 return -EIO; 230 mutex_lock(&file->ucontext_lock); 231 if (file->ucontext) { 232 ret = -EINVAL; 233 goto err; 234 } 235 236 ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device, 237 RDMACG_RESOURCE_HCA_HANDLE); 238 if (ret) 239 goto err; 240 241 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_GET_CONTEXT_FD_ARR)) { 242 fd_count = uverbs_attr_ptr_get_array_size(attrs, 243 UVERBS_ATTR_GET_CONTEXT_FD_ARR, 244 sizeof(int)); 245 if (fd_count < 0) { 246 ret = fd_count; 247 goto err_uncharge; 248 } 249 250 fd_array = uverbs_attr_get_alloced_ptr(attrs, 251 UVERBS_ATTR_GET_CONTEXT_FD_ARR); 252 ret = ib_get_ucaps(fd_array, fd_count, &ucontext->enabled_caps); 253 if (ret) 254 goto err_uncharge; 255 } 256 257 ret = ucontext->device->ops.alloc_ucontext(ucontext, 258 &attrs->driver_udata); 259 if (ret) 260 goto err_uncharge; 261 262 rdma_restrack_add(&ucontext->res); 263 264 /* 265 * Make sure that ib_uverbs_get_ucontext() sees the pointer update 266 * only after all writes to setup the ucontext have completed 267 */ 268 smp_store_release(&file->ucontext, ucontext); 269 270 mutex_unlock(&file->ucontext_lock); 271 up_read(&file->hw_destroy_rwsem); 272 return 0; 273 274 err_uncharge: 275 ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device, 276 RDMACG_RESOURCE_HCA_HANDLE); 277 err: 278 mutex_unlock(&file->ucontext_lock); 279 up_read(&file->hw_destroy_rwsem); 280 return ret; 281 } 282 283 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs) 284 { 285 struct ib_uverbs_get_context_resp resp; 286 struct ib_uverbs_get_context cmd; 287 struct ib_device *ib_dev; 288 struct ib_uobject *uobj; 289 int ret; 290 291 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 292 if (ret) 293 return ret; 294 295 ret = ib_alloc_ucontext(attrs); 296 if (ret) 297 return ret; 298 299 uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev); 300 if (IS_ERR(uobj)) { 301 ret = PTR_ERR(uobj); 302 goto err_ucontext; 303 } 304 305 resp = (struct ib_uverbs_get_context_resp){ 306 .num_comp_vectors = attrs->ufile->device->num_comp_vectors, 307 .async_fd = uobj->id, 308 }; 309 ret = uverbs_response(attrs, &resp, sizeof(resp)); 310 if (ret) 311 goto err_uobj; 312 313 ret = ib_init_ucontext(attrs); 314 if (ret) 315 goto err_uobj; 316 317 ib_uverbs_init_async_event_file( 318 container_of(uobj, struct ib_uverbs_async_event_file, uobj)); 319 rdma_alloc_commit_uobject(uobj, attrs); 320 return 0; 321 322 err_uobj: 323 rdma_alloc_abort_uobject(uobj, attrs, false); 324 err_ucontext: 325 rdma_restrack_put(&attrs->context->res); 326 kfree(attrs->context); 327 attrs->context = NULL; 328 return ret; 329 } 330 331 static void copy_query_dev_fields(struct ib_ucontext *ucontext, 332 struct ib_uverbs_query_device_resp *resp, 333 struct ib_device_attr *attr) 334 { 335 struct ib_device *ib_dev = ucontext->device; 336 337 resp->fw_ver = attr->fw_ver; 338 resp->node_guid = ib_dev->node_guid; 339 resp->sys_image_guid = attr->sys_image_guid; 340 resp->max_mr_size = attr->max_mr_size; 341 resp->page_size_cap = attr->page_size_cap; 342 resp->vendor_id = attr->vendor_id; 343 resp->vendor_part_id = attr->vendor_part_id; 344 resp->hw_ver = attr->hw_ver; 345 resp->max_qp = attr->max_qp; 346 resp->max_qp_wr = attr->max_qp_wr; 347 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags); 348 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge); 349 resp->max_sge_rd = attr->max_sge_rd; 350 resp->max_cq = attr->max_cq; 351 resp->max_cqe = attr->max_cqe; 352 resp->max_mr = attr->max_mr; 353 resp->max_pd = attr->max_pd; 354 resp->max_qp_rd_atom = attr->max_qp_rd_atom; 355 resp->max_ee_rd_atom = attr->max_ee_rd_atom; 356 resp->max_res_rd_atom = attr->max_res_rd_atom; 357 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; 358 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; 359 resp->atomic_cap = attr->atomic_cap; 360 resp->max_ee = attr->max_ee; 361 resp->max_rdd = attr->max_rdd; 362 resp->max_mw = attr->max_mw; 363 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; 364 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; 365 resp->max_mcast_grp = attr->max_mcast_grp; 366 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; 367 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; 368 resp->max_ah = attr->max_ah; 369 resp->max_srq = attr->max_srq; 370 resp->max_srq_wr = attr->max_srq_wr; 371 resp->max_srq_sge = attr->max_srq_sge; 372 resp->max_pkeys = attr->max_pkeys; 373 resp->local_ca_ack_delay = attr->local_ca_ack_delay; 374 resp->phys_port_cnt = min_t(u32, ib_dev->phys_port_cnt, U8_MAX); 375 } 376 377 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs) 378 { 379 struct ib_uverbs_query_device cmd; 380 struct ib_uverbs_query_device_resp resp; 381 struct ib_ucontext *ucontext; 382 int ret; 383 384 ucontext = ib_uverbs_get_ucontext(attrs); 385 if (IS_ERR(ucontext)) 386 return PTR_ERR(ucontext); 387 388 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 389 if (ret) 390 return ret; 391 392 memset(&resp, 0, sizeof resp); 393 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs); 394 395 return uverbs_response(attrs, &resp, sizeof(resp)); 396 } 397 398 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs) 399 { 400 struct ib_uverbs_query_port cmd; 401 struct ib_uverbs_query_port_resp resp; 402 struct ib_port_attr attr; 403 int ret; 404 struct ib_ucontext *ucontext; 405 struct ib_device *ib_dev; 406 407 ucontext = ib_uverbs_get_ucontext(attrs); 408 if (IS_ERR(ucontext)) 409 return PTR_ERR(ucontext); 410 ib_dev = ucontext->device; 411 412 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 413 if (ret) 414 return ret; 415 416 ret = ib_query_port(ib_dev, cmd.port_num, &attr); 417 if (ret) 418 return ret; 419 420 memset(&resp, 0, sizeof resp); 421 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num); 422 423 return uverbs_response(attrs, &resp, sizeof(resp)); 424 } 425 426 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs) 427 { 428 struct ib_uverbs_alloc_pd_resp resp = {}; 429 struct ib_uverbs_alloc_pd cmd; 430 struct ib_uobject *uobj; 431 struct ib_pd *pd; 432 int ret; 433 struct ib_device *ib_dev; 434 435 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 436 if (ret) 437 return ret; 438 439 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev); 440 if (IS_ERR(uobj)) 441 return PTR_ERR(uobj); 442 443 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd); 444 if (!pd) { 445 ret = -ENOMEM; 446 goto err; 447 } 448 449 pd->device = ib_dev; 450 pd->uobject = uobj; 451 atomic_set(&pd->usecnt, 0); 452 453 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD); 454 rdma_restrack_set_name(&pd->res, NULL); 455 456 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata); 457 if (ret) 458 goto err_alloc; 459 rdma_restrack_add(&pd->res); 460 461 uobj->object = pd; 462 uobj_finalize_uobj_create(uobj, attrs); 463 464 resp.pd_handle = uobj->id; 465 return uverbs_response(attrs, &resp, sizeof(resp)); 466 467 err_alloc: 468 rdma_restrack_put(&pd->res); 469 kfree(pd); 470 err: 471 uobj_alloc_abort(uobj, attrs); 472 return ret; 473 } 474 475 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs) 476 { 477 struct ib_uverbs_dealloc_pd cmd; 478 int ret; 479 480 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 481 if (ret) 482 return ret; 483 484 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 485 } 486 487 struct xrcd_table_entry { 488 struct rb_node node; 489 struct ib_xrcd *xrcd; 490 struct inode *inode; 491 }; 492 493 static int xrcd_table_insert(struct ib_uverbs_device *dev, 494 struct inode *inode, 495 struct ib_xrcd *xrcd) 496 { 497 struct xrcd_table_entry *entry, *scan; 498 struct rb_node **p = &dev->xrcd_tree.rb_node; 499 struct rb_node *parent = NULL; 500 501 entry = kmalloc_obj(*entry); 502 if (!entry) 503 return -ENOMEM; 504 505 entry->xrcd = xrcd; 506 entry->inode = inode; 507 508 while (*p) { 509 parent = *p; 510 scan = rb_entry(parent, struct xrcd_table_entry, node); 511 512 if (inode < scan->inode) { 513 p = &(*p)->rb_left; 514 } else if (inode > scan->inode) { 515 p = &(*p)->rb_right; 516 } else { 517 kfree(entry); 518 return -EEXIST; 519 } 520 } 521 522 rb_link_node(&entry->node, parent, p); 523 rb_insert_color(&entry->node, &dev->xrcd_tree); 524 igrab(inode); 525 return 0; 526 } 527 528 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, 529 struct inode *inode) 530 { 531 struct xrcd_table_entry *entry; 532 struct rb_node *p = dev->xrcd_tree.rb_node; 533 534 while (p) { 535 entry = rb_entry(p, struct xrcd_table_entry, node); 536 537 if (inode < entry->inode) 538 p = p->rb_left; 539 else if (inode > entry->inode) 540 p = p->rb_right; 541 else 542 return entry; 543 } 544 545 return NULL; 546 } 547 548 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) 549 { 550 struct xrcd_table_entry *entry; 551 552 entry = xrcd_table_search(dev, inode); 553 if (!entry) 554 return NULL; 555 556 return entry->xrcd; 557 } 558 559 static void xrcd_table_delete(struct ib_uverbs_device *dev, 560 struct inode *inode) 561 { 562 struct xrcd_table_entry *entry; 563 564 entry = xrcd_table_search(dev, inode); 565 if (entry) { 566 iput(inode); 567 rb_erase(&entry->node, &dev->xrcd_tree); 568 kfree(entry); 569 } 570 } 571 572 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs) 573 { 574 struct ib_uverbs_device *ibudev = attrs->ufile->device; 575 struct ib_uverbs_open_xrcd_resp resp = {}; 576 struct ib_uverbs_open_xrcd cmd; 577 struct ib_uxrcd_object *obj; 578 struct ib_xrcd *xrcd = NULL; 579 struct inode *inode = NULL; 580 int new_xrcd = 0; 581 struct ib_device *ib_dev; 582 struct fd f = EMPTY_FD; 583 int ret; 584 585 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 586 if (ret) 587 return ret; 588 589 mutex_lock(&ibudev->xrcd_tree_mutex); 590 591 if (cmd.fd != -1) { 592 /* search for file descriptor */ 593 f = fdget(cmd.fd); 594 if (fd_empty(f)) { 595 ret = -EBADF; 596 goto err_tree_mutex_unlock; 597 } 598 599 inode = file_inode(fd_file(f)); 600 xrcd = find_xrcd(ibudev, inode); 601 if (!xrcd && !(cmd.oflags & O_CREAT)) { 602 /* no file descriptor. Need CREATE flag */ 603 ret = -EAGAIN; 604 goto err_tree_mutex_unlock; 605 } 606 607 if (xrcd && cmd.oflags & O_EXCL) { 608 ret = -EINVAL; 609 goto err_tree_mutex_unlock; 610 } 611 } 612 613 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs, 614 &ib_dev); 615 if (IS_ERR(obj)) { 616 ret = PTR_ERR(obj); 617 goto err_tree_mutex_unlock; 618 } 619 620 if (!xrcd) { 621 xrcd = ib_alloc_xrcd_user(ib_dev, inode, &attrs->driver_udata); 622 if (IS_ERR(xrcd)) { 623 ret = PTR_ERR(xrcd); 624 goto err; 625 } 626 new_xrcd = 1; 627 } 628 629 atomic_set(&obj->refcnt, 0); 630 obj->uobject.object = xrcd; 631 632 if (inode) { 633 if (new_xrcd) { 634 /* create new inode/xrcd table entry */ 635 ret = xrcd_table_insert(ibudev, inode, xrcd); 636 if (ret) 637 goto err_dealloc_xrcd; 638 } 639 atomic_inc(&xrcd->usecnt); 640 } 641 642 fdput(f); 643 644 mutex_unlock(&ibudev->xrcd_tree_mutex); 645 uobj_finalize_uobj_create(&obj->uobject, attrs); 646 647 resp.xrcd_handle = obj->uobject.id; 648 return uverbs_response(attrs, &resp, sizeof(resp)); 649 650 err_dealloc_xrcd: 651 ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs)); 652 653 err: 654 uobj_alloc_abort(&obj->uobject, attrs); 655 656 err_tree_mutex_unlock: 657 fdput(f); 658 659 mutex_unlock(&ibudev->xrcd_tree_mutex); 660 661 return ret; 662 } 663 664 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) 665 { 666 struct ib_uverbs_close_xrcd cmd; 667 int ret; 668 669 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 670 if (ret) 671 return ret; 672 673 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); 674 } 675 676 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, 677 enum rdma_remove_reason why, 678 struct uverbs_attr_bundle *attrs) 679 { 680 struct inode *inode; 681 int ret; 682 struct ib_uverbs_device *dev = attrs->ufile->device; 683 684 inode = xrcd->inode; 685 if (inode && !atomic_dec_and_test(&xrcd->usecnt)) 686 return 0; 687 688 ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata); 689 if (ret) { 690 atomic_inc(&xrcd->usecnt); 691 return ret; 692 } 693 694 if (inode) 695 xrcd_table_delete(dev, inode); 696 697 return 0; 698 } 699 700 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) 701 { 702 struct ib_uverbs_reg_mr_resp resp = {}; 703 struct ib_uverbs_reg_mr cmd; 704 struct ib_uobject *uobj; 705 struct ib_pd *pd; 706 struct ib_mr *mr; 707 int ret; 708 struct ib_device *ib_dev; 709 710 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 711 if (ret) 712 return ret; 713 714 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 715 return -EINVAL; 716 717 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 718 if (IS_ERR(uobj)) 719 return PTR_ERR(uobj); 720 721 ret = ib_check_mr_access(ib_dev, cmd.access_flags); 722 if (ret) 723 goto err_free; 724 725 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 726 if (IS_ERR(pd)) { 727 ret = PTR_ERR(pd); 728 goto err_free; 729 } 730 731 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 732 cmd.access_flags, NULL, 733 &attrs->driver_udata); 734 if (IS_ERR(mr)) { 735 ret = PTR_ERR(mr); 736 goto err_put; 737 } 738 739 mr->device = pd->device; 740 mr->pd = pd; 741 mr->type = IB_MR_TYPE_USER; 742 mr->dm = NULL; 743 mr->sig_attrs = NULL; 744 mr->uobject = uobj; 745 atomic_inc(&pd->usecnt); 746 mr->iova = cmd.hca_va; 747 mr->length = cmd.length; 748 749 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 750 rdma_restrack_set_name(&mr->res, NULL); 751 rdma_restrack_add(&mr->res); 752 753 uobj->object = mr; 754 uobj_put_obj_read(pd); 755 uobj_finalize_uobj_create(uobj, attrs); 756 757 resp.lkey = mr->lkey; 758 resp.rkey = mr->rkey; 759 resp.mr_handle = uobj->id; 760 return uverbs_response(attrs, &resp, sizeof(resp)); 761 762 err_put: 763 uobj_put_obj_read(pd); 764 err_free: 765 uobj_alloc_abort(uobj, attrs); 766 return ret; 767 } 768 769 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 770 { 771 struct ib_uverbs_rereg_mr cmd; 772 struct ib_uverbs_rereg_mr_resp resp; 773 struct ib_mr *mr; 774 int ret; 775 struct ib_uobject *uobj; 776 struct ib_uobject *new_uobj; 777 struct ib_device *ib_dev; 778 struct ib_pd *orig_pd; 779 struct ib_pd *new_pd; 780 struct ib_mr *new_mr; 781 782 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 783 if (ret) 784 return ret; 785 786 if (!cmd.flags) 787 return -EINVAL; 788 789 if (cmd.flags & ~IB_MR_REREG_SUPPORTED) 790 return -EOPNOTSUPP; 791 792 if ((cmd.flags & IB_MR_REREG_TRANS) && 793 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 794 return -EINVAL; 795 796 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 797 if (IS_ERR(uobj)) 798 return PTR_ERR(uobj); 799 800 mr = uobj->object; 801 802 if (mr->dm) { 803 ret = -EINVAL; 804 goto put_uobjs; 805 } 806 807 if (cmd.flags & IB_MR_REREG_ACCESS) { 808 ret = ib_check_mr_access(mr->device, cmd.access_flags); 809 if (ret) 810 goto put_uobjs; 811 } 812 813 orig_pd = mr->pd; 814 if (cmd.flags & IB_MR_REREG_PD) { 815 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 816 attrs); 817 if (IS_ERR(new_pd)) { 818 ret = PTR_ERR(new_pd); 819 goto put_uobjs; 820 } 821 } else { 822 new_pd = mr->pd; 823 } 824 825 /* 826 * The driver might create a new HW object as part of the rereg, we need 827 * to have a uobject ready to hold it. 828 */ 829 new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 830 if (IS_ERR(new_uobj)) { 831 ret = PTR_ERR(new_uobj); 832 goto put_uobj_pd; 833 } 834 835 new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length, 836 cmd.hca_va, cmd.access_flags, new_pd, 837 &attrs->driver_udata); 838 if (IS_ERR(new_mr)) { 839 ret = PTR_ERR(new_mr); 840 goto put_new_uobj; 841 } 842 if (new_mr) { 843 new_mr->device = new_pd->device; 844 new_mr->pd = new_pd; 845 new_mr->type = IB_MR_TYPE_USER; 846 new_mr->uobject = uobj; 847 atomic_inc(&new_pd->usecnt); 848 new_uobj->object = new_mr; 849 850 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR); 851 rdma_restrack_set_name(&new_mr->res, NULL); 852 rdma_restrack_add(&new_mr->res); 853 854 /* 855 * The new uobj for the new HW object is put into the same spot 856 * in the IDR and the old uobj & HW object is deleted. 857 */ 858 rdma_assign_uobject(uobj, new_uobj, attrs); 859 rdma_alloc_commit_uobject(new_uobj, attrs); 860 uobj_put_destroy(uobj); 861 new_uobj = NULL; 862 uobj = NULL; 863 mr = new_mr; 864 } else { 865 if (cmd.flags & IB_MR_REREG_PD) { 866 atomic_dec(&orig_pd->usecnt); 867 mr->pd = new_pd; 868 atomic_inc(&new_pd->usecnt); 869 } 870 if (cmd.flags & IB_MR_REREG_TRANS) { 871 mr->iova = cmd.hca_va; 872 mr->length = cmd.length; 873 } 874 } 875 876 memset(&resp, 0, sizeof(resp)); 877 resp.lkey = mr->lkey; 878 resp.rkey = mr->rkey; 879 880 ret = uverbs_response(attrs, &resp, sizeof(resp)); 881 882 put_new_uobj: 883 if (new_uobj) 884 uobj_alloc_abort(new_uobj, attrs); 885 put_uobj_pd: 886 if (cmd.flags & IB_MR_REREG_PD) 887 uobj_put_obj_read(new_pd); 888 889 put_uobjs: 890 if (uobj) 891 uobj_put_write(uobj); 892 893 return ret; 894 } 895 896 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) 897 { 898 struct ib_uverbs_dereg_mr cmd; 899 int ret; 900 901 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 902 if (ret) 903 return ret; 904 905 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 906 } 907 908 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 909 { 910 struct ib_uverbs_alloc_mw cmd; 911 struct ib_uverbs_alloc_mw_resp resp = {}; 912 struct ib_uobject *uobj; 913 struct ib_pd *pd; 914 struct ib_mw *mw; 915 int ret; 916 struct ib_device *ib_dev; 917 918 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 919 if (ret) 920 return ret; 921 922 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 923 if (IS_ERR(uobj)) 924 return PTR_ERR(uobj); 925 926 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 927 if (IS_ERR(pd)) { 928 ret = PTR_ERR(pd); 929 goto err_free; 930 } 931 932 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 933 ret = -EINVAL; 934 goto err_put; 935 } 936 937 mw = rdma_zalloc_drv_obj(ib_dev, ib_mw); 938 if (!mw) { 939 ret = -ENOMEM; 940 goto err_put; 941 } 942 943 mw->device = ib_dev; 944 mw->pd = pd; 945 mw->uobject = uobj; 946 mw->type = cmd.mw_type; 947 948 ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata); 949 if (ret) 950 goto err_alloc; 951 952 atomic_inc(&pd->usecnt); 953 954 uobj->object = mw; 955 uobj_put_obj_read(pd); 956 uobj_finalize_uobj_create(uobj, attrs); 957 958 resp.rkey = mw->rkey; 959 resp.mw_handle = uobj->id; 960 return uverbs_response(attrs, &resp, sizeof(resp)); 961 962 err_alloc: 963 kfree(mw); 964 err_put: 965 uobj_put_obj_read(pd); 966 err_free: 967 uobj_alloc_abort(uobj, attrs); 968 return ret; 969 } 970 971 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) 972 { 973 struct ib_uverbs_dealloc_mw cmd; 974 int ret; 975 976 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 977 if (ret) 978 return ret; 979 980 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); 981 } 982 983 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) 984 { 985 struct ib_uverbs_create_comp_channel cmd; 986 struct ib_uverbs_create_comp_channel_resp resp; 987 struct ib_uobject *uobj; 988 struct ib_uverbs_completion_event_file *ev_file; 989 struct ib_device *ib_dev; 990 int ret; 991 992 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 993 if (ret) 994 return ret; 995 996 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); 997 if (IS_ERR(uobj)) 998 return PTR_ERR(uobj); 999 1000 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, 1001 uobj); 1002 ib_uverbs_init_event_queue(&ev_file->ev_queue); 1003 uobj_finalize_uobj_create(uobj, attrs); 1004 1005 resp.fd = uobj->id; 1006 return uverbs_response(attrs, &resp, sizeof(resp)); 1007 } 1008 1009 static int create_cq(struct uverbs_attr_bundle *attrs, 1010 struct ib_uverbs_ex_create_cq *cmd) 1011 { 1012 struct ib_ucq_object *obj; 1013 struct ib_uverbs_completion_event_file *ev_file = NULL; 1014 struct ib_cq *cq; 1015 int ret; 1016 struct ib_uverbs_ex_create_cq_resp resp = {}; 1017 struct ib_cq_init_attr attr = {}; 1018 struct ib_device *ib_dev; 1019 1020 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) 1021 return -EINVAL; 1022 1023 if (!cmd->cqe) 1024 return -EINVAL; 1025 1026 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, 1027 &ib_dev); 1028 if (IS_ERR(obj)) 1029 return PTR_ERR(obj); 1030 1031 if (cmd->comp_channel >= 0) { 1032 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); 1033 if (IS_ERR(ev_file)) { 1034 ret = PTR_ERR(ev_file); 1035 goto err; 1036 } 1037 } 1038 1039 obj->uevent.uobject.user_handle = cmd->user_handle; 1040 INIT_LIST_HEAD(&obj->comp_list); 1041 INIT_LIST_HEAD(&obj->uevent.event_list); 1042 1043 attr.cqe = cmd->cqe; 1044 attr.comp_vector = cmd->comp_vector; 1045 attr.flags = cmd->flags; 1046 1047 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 1048 if (!cq) { 1049 ret = -ENOMEM; 1050 goto err_file; 1051 } 1052 cq->device = ib_dev; 1053 cq->uobject = obj; 1054 cq->comp_handler = ib_uverbs_comp_handler; 1055 cq->event_handler = ib_uverbs_cq_event_handler; 1056 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 1057 atomic_set(&cq->usecnt, 0); 1058 1059 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ); 1060 rdma_restrack_set_name(&cq->res, NULL); 1061 1062 if (ib_dev->ops.create_user_cq) 1063 ret = ib_dev->ops.create_user_cq(cq, &attr, attrs); 1064 else 1065 ret = ib_dev->ops.create_cq(cq, &attr, attrs); 1066 if (ret) 1067 goto err_free; 1068 rdma_restrack_add(&cq->res); 1069 1070 obj->uevent.uobject.object = cq; 1071 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1072 if (obj->uevent.event_file) 1073 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1074 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1075 1076 resp.base.cq_handle = obj->uevent.uobject.id; 1077 resp.base.cqe = cq->cqe; 1078 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1079 return uverbs_response(attrs, &resp, sizeof(resp)); 1080 1081 err_free: 1082 ib_umem_release(cq->umem); 1083 rdma_restrack_put(&cq->res); 1084 kfree(cq); 1085 err_file: 1086 if (ev_file) 1087 ib_uverbs_release_ucq(ev_file, obj); 1088 err: 1089 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1090 return ret; 1091 } 1092 1093 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) 1094 { 1095 struct ib_uverbs_create_cq cmd; 1096 struct ib_uverbs_ex_create_cq cmd_ex; 1097 int ret; 1098 1099 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1100 if (ret) 1101 return ret; 1102 1103 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1104 cmd_ex.user_handle = cmd.user_handle; 1105 cmd_ex.cqe = cmd.cqe; 1106 cmd_ex.comp_vector = cmd.comp_vector; 1107 cmd_ex.comp_channel = cmd.comp_channel; 1108 1109 return create_cq(attrs, &cmd_ex); 1110 } 1111 1112 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) 1113 { 1114 struct ib_uverbs_ex_create_cq cmd; 1115 int ret; 1116 1117 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1118 if (ret) 1119 return ret; 1120 1121 if (cmd.comp_mask) 1122 return -EINVAL; 1123 1124 if (cmd.reserved) 1125 return -EINVAL; 1126 1127 return create_cq(attrs, &cmd); 1128 } 1129 1130 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) 1131 { 1132 struct ib_uverbs_resize_cq cmd; 1133 struct ib_uverbs_resize_cq_resp resp = {}; 1134 struct ib_cq *cq; 1135 int ret; 1136 1137 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1138 if (ret) 1139 return ret; 1140 1141 if (!cmd.cqe) 1142 return -EINVAL; 1143 1144 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1145 if (IS_ERR(cq)) 1146 return PTR_ERR(cq); 1147 1148 ret = cq->device->ops.resize_user_cq(cq, cmd.cqe, &attrs->driver_udata); 1149 if (ret) 1150 goto out; 1151 1152 resp.cqe = cq->cqe; 1153 1154 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1155 out: 1156 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1157 UVERBS_LOOKUP_READ); 1158 1159 return ret; 1160 } 1161 1162 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1163 struct ib_wc *wc) 1164 { 1165 struct ib_uverbs_wc tmp; 1166 1167 tmp.wr_id = wc->wr_id; 1168 tmp.status = wc->status; 1169 tmp.opcode = wc->opcode; 1170 tmp.vendor_err = wc->vendor_err; 1171 tmp.byte_len = wc->byte_len; 1172 tmp.ex.imm_data = wc->ex.imm_data; 1173 tmp.qp_num = wc->qp->qp_num; 1174 tmp.src_qp = wc->src_qp; 1175 tmp.wc_flags = wc->wc_flags; 1176 tmp.pkey_index = wc->pkey_index; 1177 if (rdma_cap_opa_ah(ib_dev, wc->port_num)) 1178 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); 1179 else 1180 tmp.slid = ib_lid_cpu16(wc->slid); 1181 tmp.sl = wc->sl; 1182 tmp.dlid_path_bits = wc->dlid_path_bits; 1183 tmp.port_num = wc->port_num; 1184 tmp.reserved = 0; 1185 1186 if (copy_to_user(dest, &tmp, sizeof tmp)) 1187 return -EFAULT; 1188 1189 return 0; 1190 } 1191 1192 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1193 { 1194 struct ib_uverbs_poll_cq cmd; 1195 struct ib_uverbs_poll_cq_resp resp; 1196 u8 __user *header_ptr; 1197 u8 __user *data_ptr; 1198 struct ib_cq *cq; 1199 struct ib_wc wc; 1200 int ret; 1201 1202 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1203 if (ret) 1204 return ret; 1205 1206 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1207 if (IS_ERR(cq)) 1208 return PTR_ERR(cq); 1209 1210 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1211 header_ptr = attrs->ucore.outbuf; 1212 data_ptr = header_ptr + sizeof resp; 1213 1214 memset(&resp, 0, sizeof resp); 1215 while (resp.count < cmd.ne) { 1216 ret = ib_poll_cq(cq, 1, &wc); 1217 if (ret < 0) 1218 goto out_put; 1219 if (!ret) 1220 break; 1221 1222 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1223 if (ret) 1224 goto out_put; 1225 1226 data_ptr += sizeof(struct ib_uverbs_wc); 1227 ++resp.count; 1228 } 1229 1230 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1231 ret = -EFAULT; 1232 goto out_put; 1233 } 1234 ret = 0; 1235 1236 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1237 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1238 1239 out_put: 1240 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1241 UVERBS_LOOKUP_READ); 1242 return ret; 1243 } 1244 1245 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1246 { 1247 struct ib_uverbs_req_notify_cq cmd; 1248 struct ib_cq *cq; 1249 int ret; 1250 1251 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1252 if (ret) 1253 return ret; 1254 1255 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1256 if (IS_ERR(cq)) 1257 return PTR_ERR(cq); 1258 1259 ib_req_notify_cq(cq, cmd.solicited_only ? 1260 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1261 1262 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1263 UVERBS_LOOKUP_READ); 1264 return 0; 1265 } 1266 1267 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1268 { 1269 struct ib_uverbs_destroy_cq cmd; 1270 struct ib_uverbs_destroy_cq_resp resp; 1271 struct ib_uobject *uobj; 1272 struct ib_ucq_object *obj; 1273 int ret; 1274 1275 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1276 if (ret) 1277 return ret; 1278 1279 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1280 if (IS_ERR(uobj)) 1281 return PTR_ERR(uobj); 1282 1283 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject); 1284 memset(&resp, 0, sizeof(resp)); 1285 resp.comp_events_reported = obj->comp_events_reported; 1286 resp.async_events_reported = obj->uevent.events_reported; 1287 1288 uobj_put_destroy(uobj); 1289 1290 return uverbs_response(attrs, &resp, sizeof(resp)); 1291 } 1292 1293 static int create_qp(struct uverbs_attr_bundle *attrs, 1294 struct ib_uverbs_ex_create_qp *cmd) 1295 { 1296 struct ib_uqp_object *obj; 1297 struct ib_device *device; 1298 struct ib_pd *pd = NULL; 1299 struct ib_xrcd *xrcd = NULL; 1300 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1301 struct ib_cq *scq = NULL, *rcq = NULL; 1302 struct ib_srq *srq = NULL; 1303 struct ib_qp *qp; 1304 struct ib_qp_init_attr attr = {}; 1305 struct ib_uverbs_ex_create_qp_resp resp = {}; 1306 int ret; 1307 struct ib_rwq_ind_table *ind_tbl = NULL; 1308 bool has_sq = true; 1309 struct ib_device *ib_dev; 1310 1311 switch (cmd->qp_type) { 1312 case IB_QPT_RAW_PACKET: 1313 if (!rdma_uattrs_has_raw_cap(attrs)) 1314 return -EPERM; 1315 fallthrough; 1316 case IB_QPT_RC: 1317 case IB_QPT_UC: 1318 case IB_QPT_UD: 1319 case IB_QPT_XRC_INI: 1320 case IB_QPT_XRC_TGT: 1321 case IB_QPT_DRIVER: 1322 break; 1323 default: 1324 return -EINVAL; 1325 } 1326 1327 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1328 &ib_dev); 1329 if (IS_ERR(obj)) 1330 return PTR_ERR(obj); 1331 obj->uxrcd = NULL; 1332 obj->uevent.uobject.user_handle = cmd->user_handle; 1333 mutex_init(&obj->mcast_lock); 1334 1335 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1336 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1337 UVERBS_OBJECT_RWQ_IND_TBL, 1338 cmd->rwq_ind_tbl_handle, attrs); 1339 if (IS_ERR(ind_tbl)) { 1340 ret = PTR_ERR(ind_tbl); 1341 goto err_put; 1342 } 1343 1344 attr.rwq_ind_tbl = ind_tbl; 1345 } 1346 1347 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1348 ret = -EINVAL; 1349 goto err_put; 1350 } 1351 1352 if (ind_tbl && !cmd->max_send_wr) 1353 has_sq = false; 1354 1355 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1356 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1357 attrs); 1358 1359 if (IS_ERR(xrcd_uobj)) { 1360 ret = -EINVAL; 1361 goto err_put; 1362 } 1363 1364 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1365 if (!xrcd) { 1366 ret = -EINVAL; 1367 goto err_put; 1368 } 1369 device = xrcd->device; 1370 } else { 1371 if (cmd->qp_type == IB_QPT_XRC_INI) { 1372 cmd->max_recv_wr = 0; 1373 cmd->max_recv_sge = 0; 1374 } else { 1375 if (cmd->is_srq) { 1376 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1377 cmd->srq_handle, attrs); 1378 if (IS_ERR(srq) || 1379 srq->srq_type == IB_SRQT_XRC) { 1380 ret = IS_ERR(srq) ? PTR_ERR(srq) : 1381 -EINVAL; 1382 goto err_put; 1383 } 1384 } 1385 1386 if (!ind_tbl) { 1387 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1388 rcq = uobj_get_obj_read( 1389 cq, UVERBS_OBJECT_CQ, 1390 cmd->recv_cq_handle, attrs); 1391 if (IS_ERR(rcq)) { 1392 ret = PTR_ERR(rcq); 1393 goto err_put; 1394 } 1395 } 1396 } 1397 } 1398 1399 if (has_sq) { 1400 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1401 cmd->send_cq_handle, attrs); 1402 if (IS_ERR(scq)) { 1403 ret = PTR_ERR(scq); 1404 goto err_put; 1405 } 1406 } 1407 1408 if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI) 1409 rcq = rcq ?: scq; 1410 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1411 attrs); 1412 if (IS_ERR(pd)) { 1413 ret = PTR_ERR(pd); 1414 goto err_put; 1415 } 1416 1417 device = pd->device; 1418 } 1419 1420 attr.event_handler = ib_uverbs_qp_event_handler; 1421 attr.send_cq = scq; 1422 attr.recv_cq = rcq; 1423 attr.srq = srq; 1424 attr.xrcd = xrcd; 1425 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1426 IB_SIGNAL_REQ_WR; 1427 attr.qp_type = cmd->qp_type; 1428 1429 attr.cap.max_send_wr = cmd->max_send_wr; 1430 attr.cap.max_recv_wr = cmd->max_recv_wr; 1431 attr.cap.max_send_sge = cmd->max_send_sge; 1432 attr.cap.max_recv_sge = cmd->max_recv_sge; 1433 attr.cap.max_inline_data = cmd->max_inline_data; 1434 1435 INIT_LIST_HEAD(&obj->uevent.event_list); 1436 INIT_LIST_HEAD(&obj->mcast_list); 1437 1438 attr.create_flags = cmd->create_flags; 1439 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1440 IB_QP_CREATE_CROSS_CHANNEL | 1441 IB_QP_CREATE_MANAGED_SEND | 1442 IB_QP_CREATE_MANAGED_RECV | 1443 IB_QP_CREATE_SCATTER_FCS | 1444 IB_QP_CREATE_CVLAN_STRIPPING | 1445 IB_QP_CREATE_SOURCE_QPN | 1446 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1447 ret = -EINVAL; 1448 goto err_put; 1449 } 1450 1451 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1452 if (!rdma_uattrs_has_raw_cap(attrs)) { 1453 ret = -EPERM; 1454 goto err_put; 1455 } 1456 1457 attr.source_qpn = cmd->source_qpn; 1458 } 1459 1460 qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj, 1461 KBUILD_MODNAME); 1462 if (IS_ERR(qp)) { 1463 ret = PTR_ERR(qp); 1464 goto err_put; 1465 } 1466 ib_qp_usecnt_inc(qp); 1467 1468 obj->uevent.uobject.object = qp; 1469 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1470 if (obj->uevent.event_file) 1471 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1472 1473 if (xrcd) { 1474 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1475 uobject); 1476 atomic_inc(&obj->uxrcd->refcnt); 1477 uobj_put_read(xrcd_uobj); 1478 } 1479 1480 if (pd) 1481 uobj_put_obj_read(pd); 1482 if (scq) 1483 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1484 UVERBS_LOOKUP_READ); 1485 if (rcq && rcq != scq) 1486 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1487 UVERBS_LOOKUP_READ); 1488 if (srq) 1489 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1490 UVERBS_LOOKUP_READ); 1491 if (ind_tbl) 1492 uobj_put_obj_read(ind_tbl); 1493 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1494 1495 resp.base.qpn = qp->qp_num; 1496 resp.base.qp_handle = obj->uevent.uobject.id; 1497 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1498 resp.base.max_send_sge = attr.cap.max_send_sge; 1499 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1500 resp.base.max_send_wr = attr.cap.max_send_wr; 1501 resp.base.max_inline_data = attr.cap.max_inline_data; 1502 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1503 return uverbs_response(attrs, &resp, sizeof(resp)); 1504 1505 err_put: 1506 if (!IS_ERR(xrcd_uobj)) 1507 uobj_put_read(xrcd_uobj); 1508 if (!IS_ERR_OR_NULL(pd)) 1509 uobj_put_obj_read(pd); 1510 if (!IS_ERR_OR_NULL(scq)) 1511 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1512 UVERBS_LOOKUP_READ); 1513 if (!IS_ERR_OR_NULL(rcq) && rcq != scq) 1514 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1515 UVERBS_LOOKUP_READ); 1516 if (!IS_ERR_OR_NULL(srq)) 1517 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1518 UVERBS_LOOKUP_READ); 1519 if (!IS_ERR_OR_NULL(ind_tbl)) 1520 uobj_put_obj_read(ind_tbl); 1521 1522 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1523 return ret; 1524 } 1525 1526 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1527 { 1528 struct ib_uverbs_create_qp cmd; 1529 struct ib_uverbs_ex_create_qp cmd_ex; 1530 int ret; 1531 1532 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1533 if (ret) 1534 return ret; 1535 1536 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1537 cmd_ex.user_handle = cmd.user_handle; 1538 cmd_ex.pd_handle = cmd.pd_handle; 1539 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1540 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1541 cmd_ex.srq_handle = cmd.srq_handle; 1542 cmd_ex.max_send_wr = cmd.max_send_wr; 1543 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1544 cmd_ex.max_send_sge = cmd.max_send_sge; 1545 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1546 cmd_ex.max_inline_data = cmd.max_inline_data; 1547 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1548 cmd_ex.qp_type = cmd.qp_type; 1549 cmd_ex.is_srq = cmd.is_srq; 1550 1551 return create_qp(attrs, &cmd_ex); 1552 } 1553 1554 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1555 { 1556 struct ib_uverbs_ex_create_qp cmd; 1557 int ret; 1558 1559 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1560 if (ret) 1561 return ret; 1562 1563 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1564 return -EINVAL; 1565 1566 if (cmd.reserved) 1567 return -EINVAL; 1568 1569 return create_qp(attrs, &cmd); 1570 } 1571 1572 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1573 { 1574 struct ib_uverbs_create_qp_resp resp = {}; 1575 struct ib_uverbs_open_qp cmd; 1576 struct ib_uqp_object *obj; 1577 struct ib_xrcd *xrcd; 1578 struct ib_qp *qp; 1579 struct ib_qp_open_attr attr = {}; 1580 int ret; 1581 struct ib_uobject *xrcd_uobj; 1582 struct ib_device *ib_dev; 1583 1584 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1585 if (ret) 1586 return ret; 1587 1588 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1589 &ib_dev); 1590 if (IS_ERR(obj)) 1591 return PTR_ERR(obj); 1592 1593 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1594 if (IS_ERR(xrcd_uobj)) { 1595 ret = -EINVAL; 1596 goto err_put; 1597 } 1598 1599 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1600 if (!xrcd) { 1601 ret = -EINVAL; 1602 goto err_xrcd; 1603 } 1604 1605 attr.event_handler = ib_uverbs_qp_event_handler; 1606 attr.qp_num = cmd.qpn; 1607 attr.qp_type = cmd.qp_type; 1608 1609 INIT_LIST_HEAD(&obj->uevent.event_list); 1610 INIT_LIST_HEAD(&obj->mcast_list); 1611 1612 qp = ib_open_qp(xrcd, &attr); 1613 if (IS_ERR(qp)) { 1614 ret = PTR_ERR(qp); 1615 goto err_xrcd; 1616 } 1617 1618 obj->uevent.uobject.object = qp; 1619 obj->uevent.uobject.user_handle = cmd.user_handle; 1620 1621 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1622 atomic_inc(&obj->uxrcd->refcnt); 1623 qp->uobject = obj; 1624 uobj_put_read(xrcd_uobj); 1625 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1626 1627 resp.qpn = qp->qp_num; 1628 resp.qp_handle = obj->uevent.uobject.id; 1629 return uverbs_response(attrs, &resp, sizeof(resp)); 1630 1631 err_xrcd: 1632 uobj_put_read(xrcd_uobj); 1633 err_put: 1634 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1635 return ret; 1636 } 1637 1638 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, 1639 struct rdma_ah_attr *rdma_attr) 1640 { 1641 const struct ib_global_route *grh; 1642 1643 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr); 1644 uverb_attr->sl = rdma_ah_get_sl(rdma_attr); 1645 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr); 1646 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr); 1647 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) & 1648 IB_AH_GRH); 1649 if (uverb_attr->is_global) { 1650 grh = rdma_ah_read_grh(rdma_attr); 1651 memcpy(uverb_attr->dgid, grh->dgid.raw, 16); 1652 uverb_attr->flow_label = grh->flow_label; 1653 uverb_attr->sgid_index = grh->sgid_index; 1654 uverb_attr->hop_limit = grh->hop_limit; 1655 uverb_attr->traffic_class = grh->traffic_class; 1656 } 1657 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr); 1658 } 1659 1660 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) 1661 { 1662 struct ib_uverbs_query_qp cmd; 1663 struct ib_uverbs_query_qp_resp resp; 1664 struct ib_qp *qp; 1665 struct ib_qp_attr *attr; 1666 struct ib_qp_init_attr *init_attr; 1667 int ret; 1668 1669 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1670 if (ret) 1671 return ret; 1672 1673 attr = kmalloc_obj(*attr); 1674 init_attr = kmalloc_obj(*init_attr); 1675 if (!attr || !init_attr) { 1676 ret = -ENOMEM; 1677 goto out; 1678 } 1679 1680 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1681 if (IS_ERR(qp)) { 1682 ret = PTR_ERR(qp); 1683 goto out; 1684 } 1685 1686 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1687 1688 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1689 UVERBS_LOOKUP_READ); 1690 1691 if (ret) 1692 goto out; 1693 1694 memset(&resp, 0, sizeof resp); 1695 1696 resp.qp_state = attr->qp_state; 1697 resp.cur_qp_state = attr->cur_qp_state; 1698 resp.path_mtu = attr->path_mtu; 1699 resp.path_mig_state = attr->path_mig_state; 1700 resp.qkey = attr->qkey; 1701 resp.rq_psn = attr->rq_psn; 1702 resp.sq_psn = attr->sq_psn; 1703 resp.dest_qp_num = attr->dest_qp_num; 1704 resp.qp_access_flags = attr->qp_access_flags; 1705 resp.pkey_index = attr->pkey_index; 1706 resp.alt_pkey_index = attr->alt_pkey_index; 1707 resp.sq_draining = attr->sq_draining; 1708 resp.max_rd_atomic = attr->max_rd_atomic; 1709 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1710 resp.min_rnr_timer = attr->min_rnr_timer; 1711 resp.port_num = attr->port_num; 1712 resp.timeout = attr->timeout; 1713 resp.retry_cnt = attr->retry_cnt; 1714 resp.rnr_retry = attr->rnr_retry; 1715 resp.alt_port_num = attr->alt_port_num; 1716 resp.alt_timeout = attr->alt_timeout; 1717 1718 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1719 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1720 1721 resp.max_send_wr = init_attr->cap.max_send_wr; 1722 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1723 resp.max_send_sge = init_attr->cap.max_send_sge; 1724 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1725 resp.max_inline_data = init_attr->cap.max_inline_data; 1726 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1727 1728 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1729 1730 out: 1731 kfree(attr); 1732 kfree(init_attr); 1733 1734 return ret; 1735 } 1736 1737 /* Remove ignored fields set in the attribute mask */ 1738 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1739 { 1740 switch (qp_type) { 1741 case IB_QPT_XRC_INI: 1742 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1743 case IB_QPT_XRC_TGT: 1744 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1745 IB_QP_RNR_RETRY); 1746 default: 1747 return mask; 1748 } 1749 } 1750 1751 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1752 struct rdma_ah_attr *rdma_attr, 1753 struct ib_uverbs_qp_dest *uverb_attr) 1754 { 1755 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); 1756 if (uverb_attr->is_global) { 1757 rdma_ah_set_grh(rdma_attr, NULL, 1758 uverb_attr->flow_label, 1759 uverb_attr->sgid_index, 1760 uverb_attr->hop_limit, 1761 uverb_attr->traffic_class); 1762 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); 1763 } else { 1764 rdma_ah_set_ah_flags(rdma_attr, 0); 1765 } 1766 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); 1767 rdma_ah_set_sl(rdma_attr, uverb_attr->sl); 1768 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); 1769 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); 1770 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); 1771 rdma_ah_set_make_grd(rdma_attr, false); 1772 } 1773 1774 static int modify_qp(struct uverbs_attr_bundle *attrs, 1775 struct ib_uverbs_ex_modify_qp *cmd) 1776 { 1777 struct ib_qp_attr *attr; 1778 struct ib_qp *qp; 1779 int ret; 1780 1781 attr = kzalloc_obj(*attr); 1782 if (!attr) 1783 return -ENOMEM; 1784 1785 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1786 attrs); 1787 if (IS_ERR(qp)) { 1788 ret = PTR_ERR(qp); 1789 goto out; 1790 } 1791 1792 if ((cmd->base.attr_mask & IB_QP_PORT) && 1793 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1794 ret = -EINVAL; 1795 goto release_qp; 1796 } 1797 1798 if ((cmd->base.attr_mask & IB_QP_AV)) { 1799 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1800 ret = -EINVAL; 1801 goto release_qp; 1802 } 1803 1804 if (cmd->base.attr_mask & IB_QP_STATE && 1805 cmd->base.qp_state == IB_QPS_RTR) { 1806 /* We are in INIT->RTR TRANSITION (if we are not, 1807 * this transition will be rejected in subsequent checks). 1808 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1809 * but the IB_QP_STATE flag is required. 1810 * 1811 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1812 * when IB_QP_AV is set, has required inclusion of a valid 1813 * port number in the primary AV. (AVs are created and handled 1814 * differently for infiniband and ethernet (RoCE) ports). 1815 * 1816 * Check the port number included in the primary AV against 1817 * the port number in the qp struct, which was set (and saved) 1818 * in the RST->INIT transition. 1819 */ 1820 if (cmd->base.dest.port_num != qp->real_qp->port) { 1821 ret = -EINVAL; 1822 goto release_qp; 1823 } 1824 } else { 1825 /* We are in SQD->SQD. (If we are not, this transition will 1826 * be rejected later in the verbs layer checks). 1827 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1828 * together in the SQD->SQD transition. 1829 * 1830 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1831 * verbs layer driver does not track primary port changes 1832 * resulting from path migration. Thus, in SQD, if the primary 1833 * AV is modified, the primary port should also be modified). 1834 * 1835 * Note that in this transition, the IB_QP_STATE flag 1836 * is not allowed. 1837 */ 1838 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1839 == (IB_QP_AV | IB_QP_PORT)) && 1840 cmd->base.port_num != cmd->base.dest.port_num) { 1841 ret = -EINVAL; 1842 goto release_qp; 1843 } 1844 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1845 == IB_QP_AV) { 1846 cmd->base.attr_mask |= IB_QP_PORT; 1847 cmd->base.port_num = cmd->base.dest.port_num; 1848 } 1849 } 1850 } 1851 1852 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1853 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1854 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1855 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1856 ret = -EINVAL; 1857 goto release_qp; 1858 } 1859 1860 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1861 cmd->base.cur_qp_state > IB_QPS_ERR) || 1862 (cmd->base.attr_mask & IB_QP_STATE && 1863 cmd->base.qp_state > IB_QPS_ERR)) { 1864 ret = -EINVAL; 1865 goto release_qp; 1866 } 1867 1868 if (cmd->base.attr_mask & IB_QP_STATE) 1869 attr->qp_state = cmd->base.qp_state; 1870 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1871 attr->cur_qp_state = cmd->base.cur_qp_state; 1872 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1873 attr->path_mtu = cmd->base.path_mtu; 1874 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1875 attr->path_mig_state = cmd->base.path_mig_state; 1876 if (cmd->base.attr_mask & IB_QP_QKEY) { 1877 if (cmd->base.qkey & IB_QP_SET_QKEY && 1878 !(rdma_nl_get_privileged_qkey() || 1879 rdma_uattrs_has_raw_cap(attrs))) { 1880 ret = -EPERM; 1881 goto release_qp; 1882 } 1883 attr->qkey = cmd->base.qkey; 1884 } 1885 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1886 attr->rq_psn = cmd->base.rq_psn; 1887 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1888 attr->sq_psn = cmd->base.sq_psn; 1889 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1890 attr->dest_qp_num = cmd->base.dest_qp_num; 1891 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1892 attr->qp_access_flags = cmd->base.qp_access_flags; 1893 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1894 attr->pkey_index = cmd->base.pkey_index; 1895 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1896 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1897 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1898 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1899 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1900 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1901 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1902 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1903 if (cmd->base.attr_mask & IB_QP_PORT) 1904 attr->port_num = cmd->base.port_num; 1905 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1906 attr->timeout = cmd->base.timeout; 1907 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1908 attr->retry_cnt = cmd->base.retry_cnt; 1909 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1910 attr->rnr_retry = cmd->base.rnr_retry; 1911 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1912 attr->alt_port_num = cmd->base.alt_port_num; 1913 attr->alt_timeout = cmd->base.alt_timeout; 1914 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1915 } 1916 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1917 attr->rate_limit = cmd->rate_limit; 1918 1919 if (cmd->base.attr_mask & IB_QP_AV) 1920 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1921 &cmd->base.dest); 1922 1923 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1924 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1925 &cmd->base.alt_dest); 1926 1927 ret = ib_modify_qp_with_udata(qp, attr, 1928 modify_qp_mask(qp->qp_type, 1929 cmd->base.attr_mask), 1930 &attrs->driver_udata); 1931 1932 release_qp: 1933 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1934 UVERBS_LOOKUP_READ); 1935 out: 1936 kfree(attr); 1937 1938 return ret; 1939 } 1940 1941 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1942 { 1943 struct ib_uverbs_ex_modify_qp cmd; 1944 int ret; 1945 1946 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1947 if (ret) 1948 return ret; 1949 1950 if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 1951 return -EOPNOTSUPP; 1952 1953 return modify_qp(attrs, &cmd); 1954 } 1955 1956 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1957 { 1958 struct ib_uverbs_ex_modify_qp cmd; 1959 struct ib_uverbs_ex_modify_qp_resp resp = { 1960 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1961 }; 1962 int ret; 1963 1964 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1965 if (ret) 1966 return ret; 1967 1968 /* 1969 * Last bit is reserved for extending the attr_mask by 1970 * using another field. 1971 */ 1972 if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT)) 1973 return -EOPNOTSUPP; 1974 1975 ret = modify_qp(attrs, &cmd); 1976 if (ret) 1977 return ret; 1978 1979 return uverbs_response(attrs, &resp, sizeof(resp)); 1980 } 1981 1982 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1983 { 1984 struct ib_uverbs_destroy_qp cmd; 1985 struct ib_uverbs_destroy_qp_resp resp; 1986 struct ib_uobject *uobj; 1987 struct ib_uqp_object *obj; 1988 int ret; 1989 1990 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1991 if (ret) 1992 return ret; 1993 1994 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1995 if (IS_ERR(uobj)) 1996 return PTR_ERR(uobj); 1997 1998 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1999 memset(&resp, 0, sizeof(resp)); 2000 resp.events_reported = obj->uevent.events_reported; 2001 2002 uobj_put_destroy(uobj); 2003 2004 return uverbs_response(attrs, &resp, sizeof(resp)); 2005 } 2006 2007 static void *alloc_wr(size_t wr_size, __u32 num_sge) 2008 { 2009 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) / 2010 sizeof(struct ib_sge)) 2011 return NULL; 2012 2013 return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) + 2014 num_sge * sizeof(struct ib_sge), 2015 GFP_KERNEL); 2016 } 2017 2018 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 2019 { 2020 struct ib_uverbs_post_send cmd; 2021 struct ib_uverbs_post_send_resp resp; 2022 struct ib_uverbs_send_wr *user_wr; 2023 struct ib_send_wr *wr = NULL, *last, *next; 2024 const struct ib_send_wr *bad_wr; 2025 struct ib_qp *qp; 2026 int i, sg_ind; 2027 int is_ud; 2028 int ret, ret2; 2029 size_t next_size; 2030 const struct ib_sge __user *sgls; 2031 const void __user *wqes; 2032 struct uverbs_req_iter iter; 2033 2034 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2035 if (ret) 2036 return ret; 2037 wqes = uverbs_request_next_ptr(&iter, size_mul(cmd.wqe_size, 2038 cmd.wr_count)); 2039 if (IS_ERR(wqes)) 2040 return PTR_ERR(wqes); 2041 sgls = uverbs_request_next_ptr(&iter, 2042 size_mul(cmd.sge_count, 2043 sizeof(struct ib_uverbs_sge))); 2044 if (IS_ERR(sgls)) 2045 return PTR_ERR(sgls); 2046 ret = uverbs_request_finish(&iter); 2047 if (ret) 2048 return ret; 2049 2050 if (cmd.wqe_size < sizeof(struct ib_uverbs_send_wr)) 2051 return -EINVAL; 2052 2053 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL | __GFP_NOWARN); 2054 if (!user_wr) 2055 return -ENOMEM; 2056 2057 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2058 if (IS_ERR(qp)) { 2059 ret = PTR_ERR(qp); 2060 goto out; 2061 } 2062 2063 is_ud = qp->qp_type == IB_QPT_UD; 2064 sg_ind = 0; 2065 last = NULL; 2066 for (i = 0; i < cmd.wr_count; ++i) { 2067 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2068 cmd.wqe_size)) { 2069 ret = -EFAULT; 2070 goto out_put; 2071 } 2072 2073 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2074 ret = -EINVAL; 2075 goto out_put; 2076 } 2077 2078 if (is_ud) { 2079 struct ib_ud_wr *ud; 2080 2081 if (user_wr->opcode != IB_WR_SEND && 2082 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2083 ret = -EINVAL; 2084 goto out_put; 2085 } 2086 2087 next_size = sizeof(*ud); 2088 ud = alloc_wr(next_size, user_wr->num_sge); 2089 if (!ud) { 2090 ret = -ENOMEM; 2091 goto out_put; 2092 } 2093 2094 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2095 user_wr->wr.ud.ah, attrs); 2096 if (IS_ERR(ud->ah)) { 2097 ret = PTR_ERR(ud->ah); 2098 kfree(ud); 2099 goto out_put; 2100 } 2101 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2102 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2103 2104 next = &ud->wr; 2105 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2106 user_wr->opcode == IB_WR_RDMA_WRITE || 2107 user_wr->opcode == IB_WR_RDMA_READ) { 2108 struct ib_rdma_wr *rdma; 2109 2110 next_size = sizeof(*rdma); 2111 rdma = alloc_wr(next_size, user_wr->num_sge); 2112 if (!rdma) { 2113 ret = -ENOMEM; 2114 goto out_put; 2115 } 2116 2117 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2118 rdma->rkey = user_wr->wr.rdma.rkey; 2119 2120 next = &rdma->wr; 2121 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2122 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2123 struct ib_atomic_wr *atomic; 2124 2125 next_size = sizeof(*atomic); 2126 atomic = alloc_wr(next_size, user_wr->num_sge); 2127 if (!atomic) { 2128 ret = -ENOMEM; 2129 goto out_put; 2130 } 2131 2132 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2133 atomic->compare_add = user_wr->wr.atomic.compare_add; 2134 atomic->swap = user_wr->wr.atomic.swap; 2135 atomic->rkey = user_wr->wr.atomic.rkey; 2136 2137 next = &atomic->wr; 2138 } else if (user_wr->opcode == IB_WR_SEND || 2139 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2140 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2141 next_size = sizeof(*next); 2142 next = alloc_wr(next_size, user_wr->num_sge); 2143 if (!next) { 2144 ret = -ENOMEM; 2145 goto out_put; 2146 } 2147 } else { 2148 ret = -EINVAL; 2149 goto out_put; 2150 } 2151 2152 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2153 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2154 next->ex.imm_data = 2155 (__be32 __force) user_wr->ex.imm_data; 2156 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2157 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2158 } 2159 2160 if (!last) 2161 wr = next; 2162 else 2163 last->next = next; 2164 last = next; 2165 2166 next->next = NULL; 2167 next->wr_id = user_wr->wr_id; 2168 next->num_sge = user_wr->num_sge; 2169 next->opcode = user_wr->opcode; 2170 next->send_flags = user_wr->send_flags; 2171 2172 if (next->num_sge) { 2173 next->sg_list = (void *) next + 2174 ALIGN(next_size, sizeof(struct ib_sge)); 2175 if (copy_from_user(next->sg_list, sgls + sg_ind, 2176 next->num_sge * 2177 sizeof(struct ib_sge))) { 2178 ret = -EFAULT; 2179 goto out_put; 2180 } 2181 sg_ind += next->num_sge; 2182 } else 2183 next->sg_list = NULL; 2184 } 2185 2186 resp.bad_wr = 0; 2187 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2188 if (ret) 2189 for (next = wr; next; next = next->next) { 2190 ++resp.bad_wr; 2191 if (next == bad_wr) 2192 break; 2193 } 2194 2195 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2196 if (ret2) 2197 ret = ret2; 2198 2199 out_put: 2200 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2201 UVERBS_LOOKUP_READ); 2202 2203 while (wr) { 2204 if (is_ud && ud_wr(wr)->ah) 2205 uobj_put_obj_read(ud_wr(wr)->ah); 2206 next = wr->next; 2207 kfree(wr); 2208 wr = next; 2209 } 2210 2211 out: 2212 kfree(user_wr); 2213 2214 return ret; 2215 } 2216 2217 static struct ib_recv_wr * 2218 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2219 u32 wqe_size, u32 sge_count) 2220 { 2221 struct ib_uverbs_recv_wr *user_wr; 2222 struct ib_recv_wr *wr = NULL, *last, *next; 2223 int sg_ind; 2224 int i; 2225 int ret; 2226 const struct ib_sge __user *sgls; 2227 const void __user *wqes; 2228 2229 if (wqe_size < sizeof(struct ib_uverbs_recv_wr)) 2230 return ERR_PTR(-EINVAL); 2231 2232 wqes = uverbs_request_next_ptr(iter, size_mul(wqe_size, wr_count)); 2233 if (IS_ERR(wqes)) 2234 return ERR_CAST(wqes); 2235 sgls = uverbs_request_next_ptr(iter, size_mul(sge_count, 2236 sizeof(struct ib_uverbs_sge))); 2237 if (IS_ERR(sgls)) 2238 return ERR_CAST(sgls); 2239 ret = uverbs_request_finish(iter); 2240 if (ret) 2241 return ERR_PTR(ret); 2242 2243 user_wr = kmalloc(wqe_size, GFP_KERNEL | __GFP_NOWARN); 2244 if (!user_wr) 2245 return ERR_PTR(-ENOMEM); 2246 2247 sg_ind = 0; 2248 last = NULL; 2249 for (i = 0; i < wr_count; ++i) { 2250 if (copy_from_user(user_wr, wqes + i * wqe_size, 2251 wqe_size)) { 2252 ret = -EFAULT; 2253 goto err; 2254 } 2255 2256 if (user_wr->num_sge + sg_ind > sge_count) { 2257 ret = -EINVAL; 2258 goto err; 2259 } 2260 2261 if (user_wr->num_sge >= 2262 (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) / 2263 sizeof(struct ib_sge)) { 2264 ret = -EINVAL; 2265 goto err; 2266 } 2267 2268 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) + 2269 user_wr->num_sge * sizeof(struct ib_sge), 2270 GFP_KERNEL); 2271 if (!next) { 2272 ret = -ENOMEM; 2273 goto err; 2274 } 2275 2276 if (!last) 2277 wr = next; 2278 else 2279 last->next = next; 2280 last = next; 2281 2282 next->next = NULL; 2283 next->wr_id = user_wr->wr_id; 2284 next->num_sge = user_wr->num_sge; 2285 2286 if (next->num_sge) { 2287 next->sg_list = (void *)next + 2288 ALIGN(sizeof(*next), sizeof(struct ib_sge)); 2289 if (copy_from_user(next->sg_list, sgls + sg_ind, 2290 next->num_sge * 2291 sizeof(struct ib_sge))) { 2292 ret = -EFAULT; 2293 goto err; 2294 } 2295 sg_ind += next->num_sge; 2296 } else 2297 next->sg_list = NULL; 2298 } 2299 2300 kfree(user_wr); 2301 return wr; 2302 2303 err: 2304 kfree(user_wr); 2305 2306 while (wr) { 2307 next = wr->next; 2308 kfree(wr); 2309 wr = next; 2310 } 2311 2312 return ERR_PTR(ret); 2313 } 2314 2315 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2316 { 2317 struct ib_uverbs_post_recv cmd; 2318 struct ib_uverbs_post_recv_resp resp; 2319 struct ib_recv_wr *wr, *next; 2320 const struct ib_recv_wr *bad_wr; 2321 struct ib_qp *qp; 2322 int ret, ret2; 2323 struct uverbs_req_iter iter; 2324 2325 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2326 if (ret) 2327 return ret; 2328 2329 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2330 cmd.sge_count); 2331 if (IS_ERR(wr)) 2332 return PTR_ERR(wr); 2333 2334 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2335 if (IS_ERR(qp)) { 2336 ret = PTR_ERR(qp); 2337 goto out; 2338 } 2339 2340 resp.bad_wr = 0; 2341 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2342 2343 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2344 UVERBS_LOOKUP_READ); 2345 if (ret) { 2346 for (next = wr; next; next = next->next) { 2347 ++resp.bad_wr; 2348 if (next == bad_wr) 2349 break; 2350 } 2351 } 2352 2353 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2354 if (ret2) 2355 ret = ret2; 2356 out: 2357 while (wr) { 2358 next = wr->next; 2359 kfree(wr); 2360 wr = next; 2361 } 2362 2363 return ret; 2364 } 2365 2366 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2367 { 2368 struct ib_uverbs_post_srq_recv cmd; 2369 struct ib_uverbs_post_srq_recv_resp resp; 2370 struct ib_recv_wr *wr, *next; 2371 const struct ib_recv_wr *bad_wr; 2372 struct ib_srq *srq; 2373 int ret, ret2; 2374 struct uverbs_req_iter iter; 2375 2376 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2377 if (ret) 2378 return ret; 2379 2380 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2381 cmd.sge_count); 2382 if (IS_ERR(wr)) 2383 return PTR_ERR(wr); 2384 2385 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2386 if (IS_ERR(srq)) { 2387 ret = PTR_ERR(srq); 2388 goto out; 2389 } 2390 2391 resp.bad_wr = 0; 2392 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2393 2394 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 2395 UVERBS_LOOKUP_READ); 2396 2397 if (ret) 2398 for (next = wr; next; next = next->next) { 2399 ++resp.bad_wr; 2400 if (next == bad_wr) 2401 break; 2402 } 2403 2404 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2405 if (ret2) 2406 ret = ret2; 2407 2408 out: 2409 while (wr) { 2410 next = wr->next; 2411 kfree(wr); 2412 wr = next; 2413 } 2414 2415 return ret; 2416 } 2417 2418 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2419 { 2420 struct ib_uverbs_create_ah cmd; 2421 struct ib_uverbs_create_ah_resp resp; 2422 struct ib_uobject *uobj; 2423 struct ib_pd *pd; 2424 struct ib_ah *ah; 2425 struct rdma_ah_attr attr = {}; 2426 int ret; 2427 struct ib_device *ib_dev; 2428 2429 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2430 if (ret) 2431 return ret; 2432 2433 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2434 if (IS_ERR(uobj)) 2435 return PTR_ERR(uobj); 2436 2437 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2438 ret = -EINVAL; 2439 goto err; 2440 } 2441 2442 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2443 if (IS_ERR(pd)) { 2444 ret = PTR_ERR(pd); 2445 goto err; 2446 } 2447 2448 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2449 rdma_ah_set_make_grd(&attr, false); 2450 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2451 rdma_ah_set_sl(&attr, cmd.attr.sl); 2452 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2453 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2454 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2455 2456 if (cmd.attr.is_global) { 2457 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2458 cmd.attr.grh.sgid_index, 2459 cmd.attr.grh.hop_limit, 2460 cmd.attr.grh.traffic_class); 2461 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2462 } else { 2463 rdma_ah_set_ah_flags(&attr, 0); 2464 } 2465 2466 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2467 if (IS_ERR(ah)) { 2468 ret = PTR_ERR(ah); 2469 goto err_put; 2470 } 2471 2472 ah->uobject = uobj; 2473 uobj->user_handle = cmd.user_handle; 2474 uobj->object = ah; 2475 uobj_put_obj_read(pd); 2476 uobj_finalize_uobj_create(uobj, attrs); 2477 2478 resp.ah_handle = uobj->id; 2479 return uverbs_response(attrs, &resp, sizeof(resp)); 2480 2481 err_put: 2482 uobj_put_obj_read(pd); 2483 err: 2484 uobj_alloc_abort(uobj, attrs); 2485 return ret; 2486 } 2487 2488 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2489 { 2490 struct ib_uverbs_destroy_ah cmd; 2491 int ret; 2492 2493 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2494 if (ret) 2495 return ret; 2496 2497 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2498 } 2499 2500 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2501 { 2502 struct ib_uverbs_attach_mcast cmd; 2503 struct ib_qp *qp; 2504 struct ib_uqp_object *obj; 2505 struct ib_uverbs_mcast_entry *mcast; 2506 int ret; 2507 2508 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2509 if (ret) 2510 return ret; 2511 2512 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2513 if (IS_ERR(qp)) 2514 return PTR_ERR(qp); 2515 2516 obj = qp->uobject; 2517 2518 mutex_lock(&obj->mcast_lock); 2519 list_for_each_entry(mcast, &obj->mcast_list, list) 2520 if (cmd.mlid == mcast->lid && 2521 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2522 ret = 0; 2523 goto out_put; 2524 } 2525 2526 mcast = kmalloc_obj(*mcast); 2527 if (!mcast) { 2528 ret = -ENOMEM; 2529 goto out_put; 2530 } 2531 2532 mcast->lid = cmd.mlid; 2533 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2534 2535 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2536 if (!ret) 2537 list_add_tail(&mcast->list, &obj->mcast_list); 2538 else 2539 kfree(mcast); 2540 2541 out_put: 2542 mutex_unlock(&obj->mcast_lock); 2543 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2544 UVERBS_LOOKUP_READ); 2545 2546 return ret; 2547 } 2548 2549 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2550 { 2551 struct ib_uverbs_detach_mcast cmd; 2552 struct ib_uqp_object *obj; 2553 struct ib_qp *qp; 2554 struct ib_uverbs_mcast_entry *mcast; 2555 int ret; 2556 bool found = false; 2557 2558 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2559 if (ret) 2560 return ret; 2561 2562 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2563 if (IS_ERR(qp)) 2564 return PTR_ERR(qp); 2565 2566 obj = qp->uobject; 2567 mutex_lock(&obj->mcast_lock); 2568 2569 list_for_each_entry(mcast, &obj->mcast_list, list) 2570 if (cmd.mlid == mcast->lid && 2571 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2572 list_del(&mcast->list); 2573 kfree(mcast); 2574 found = true; 2575 break; 2576 } 2577 2578 if (!found) { 2579 ret = -EINVAL; 2580 goto out_put; 2581 } 2582 2583 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2584 2585 out_put: 2586 mutex_unlock(&obj->mcast_lock); 2587 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2588 UVERBS_LOOKUP_READ); 2589 return ret; 2590 } 2591 2592 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2593 { 2594 struct ib_uflow_resources *resources; 2595 2596 resources = kzalloc_obj(*resources); 2597 2598 if (!resources) 2599 return NULL; 2600 2601 if (!num_specs) 2602 goto out; 2603 2604 resources->counters = 2605 kzalloc_objs(*resources->counters, num_specs); 2606 resources->collection = 2607 kzalloc_objs(*resources->collection, num_specs); 2608 2609 if (!resources->counters || !resources->collection) 2610 goto err; 2611 2612 out: 2613 resources->max = num_specs; 2614 return resources; 2615 2616 err: 2617 kfree(resources->counters); 2618 kfree(resources); 2619 2620 return NULL; 2621 } 2622 EXPORT_SYMBOL(flow_resources_alloc); 2623 2624 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2625 { 2626 unsigned int i; 2627 2628 if (!uflow_res) 2629 return; 2630 2631 for (i = 0; i < uflow_res->collection_num; i++) 2632 atomic_dec(&uflow_res->collection[i]->usecnt); 2633 2634 for (i = 0; i < uflow_res->counters_num; i++) 2635 atomic_dec(&uflow_res->counters[i]->usecnt); 2636 2637 kfree(uflow_res->collection); 2638 kfree(uflow_res->counters); 2639 kfree(uflow_res); 2640 } 2641 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2642 2643 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2644 enum ib_flow_spec_type type, 2645 void *ibobj) 2646 { 2647 WARN_ON(uflow_res->num >= uflow_res->max); 2648 2649 switch (type) { 2650 case IB_FLOW_SPEC_ACTION_HANDLE: 2651 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2652 uflow_res->collection[uflow_res->collection_num++] = 2653 (struct ib_flow_action *)ibobj; 2654 break; 2655 case IB_FLOW_SPEC_ACTION_COUNT: 2656 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2657 uflow_res->counters[uflow_res->counters_num++] = 2658 (struct ib_counters *)ibobj; 2659 break; 2660 default: 2661 WARN_ON(1); 2662 } 2663 2664 uflow_res->num++; 2665 } 2666 EXPORT_SYMBOL(flow_resources_add); 2667 2668 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2669 struct ib_uverbs_flow_spec *kern_spec, 2670 union ib_flow_spec *ib_spec, 2671 struct ib_uflow_resources *uflow_res) 2672 { 2673 ib_spec->type = kern_spec->type; 2674 switch (ib_spec->type) { 2675 case IB_FLOW_SPEC_ACTION_TAG: 2676 if (kern_spec->flow_tag.size != 2677 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2678 return -EINVAL; 2679 2680 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2681 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2682 break; 2683 case IB_FLOW_SPEC_ACTION_DROP: 2684 if (kern_spec->drop.size != 2685 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2686 return -EINVAL; 2687 2688 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2689 break; 2690 case IB_FLOW_SPEC_ACTION_HANDLE: 2691 if (kern_spec->action.size != 2692 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2693 return -EOPNOTSUPP; 2694 ib_spec->action.act = uobj_get_obj_read(flow_action, 2695 UVERBS_OBJECT_FLOW_ACTION, 2696 kern_spec->action.handle, 2697 attrs); 2698 if (IS_ERR(ib_spec->action.act)) 2699 return PTR_ERR(ib_spec->action.act); 2700 ib_spec->action.size = 2701 sizeof(struct ib_flow_spec_action_handle); 2702 flow_resources_add(uflow_res, 2703 IB_FLOW_SPEC_ACTION_HANDLE, 2704 ib_spec->action.act); 2705 uobj_put_obj_read(ib_spec->action.act); 2706 break; 2707 case IB_FLOW_SPEC_ACTION_COUNT: 2708 if (kern_spec->flow_count.size != 2709 sizeof(struct ib_uverbs_flow_spec_action_count)) 2710 return -EINVAL; 2711 ib_spec->flow_count.counters = 2712 uobj_get_obj_read(counters, 2713 UVERBS_OBJECT_COUNTERS, 2714 kern_spec->flow_count.handle, 2715 attrs); 2716 if (IS_ERR(ib_spec->flow_count.counters)) 2717 return PTR_ERR(ib_spec->flow_count.counters); 2718 ib_spec->flow_count.size = 2719 sizeof(struct ib_flow_spec_action_count); 2720 flow_resources_add(uflow_res, 2721 IB_FLOW_SPEC_ACTION_COUNT, 2722 ib_spec->flow_count.counters); 2723 uobj_put_obj_read(ib_spec->flow_count.counters); 2724 break; 2725 default: 2726 return -EINVAL; 2727 } 2728 return 0; 2729 } 2730 2731 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2732 u16 ib_real_filter_sz) 2733 { 2734 /* 2735 * User space filter structures must be 64 bit aligned, otherwise this 2736 * may pass, but we won't handle additional new attributes. 2737 */ 2738 2739 if (kern_filter_size > ib_real_filter_sz) { 2740 if (memchr_inv(kern_spec_filter + 2741 ib_real_filter_sz, 0, 2742 kern_filter_size - ib_real_filter_sz)) 2743 return -EINVAL; 2744 return ib_real_filter_sz; 2745 } 2746 return kern_filter_size; 2747 } 2748 2749 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2750 const void *kern_spec_mask, 2751 const void *kern_spec_val, 2752 size_t kern_filter_sz, 2753 union ib_flow_spec *ib_spec) 2754 { 2755 ssize_t actual_filter_sz; 2756 ssize_t ib_filter_sz; 2757 2758 /* User flow spec size must be aligned to 4 bytes */ 2759 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2760 return -EINVAL; 2761 2762 ib_spec->type = type; 2763 2764 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2765 return -EINVAL; 2766 2767 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2768 case IB_FLOW_SPEC_ETH: 2769 ib_filter_sz = sizeof(struct ib_flow_eth_filter); 2770 actual_filter_sz = spec_filter_size(kern_spec_mask, 2771 kern_filter_sz, 2772 ib_filter_sz); 2773 if (actual_filter_sz <= 0) 2774 return -EINVAL; 2775 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2776 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2777 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2778 break; 2779 case IB_FLOW_SPEC_IPV4: 2780 ib_filter_sz = sizeof(struct ib_flow_ipv4_filter); 2781 actual_filter_sz = spec_filter_size(kern_spec_mask, 2782 kern_filter_sz, 2783 ib_filter_sz); 2784 if (actual_filter_sz <= 0) 2785 return -EINVAL; 2786 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2787 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2788 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2789 break; 2790 case IB_FLOW_SPEC_IPV6: 2791 ib_filter_sz = sizeof(struct ib_flow_ipv6_filter); 2792 actual_filter_sz = spec_filter_size(kern_spec_mask, 2793 kern_filter_sz, 2794 ib_filter_sz); 2795 if (actual_filter_sz <= 0) 2796 return -EINVAL; 2797 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2798 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2799 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2800 2801 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2802 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2803 return -EINVAL; 2804 break; 2805 case IB_FLOW_SPEC_TCP: 2806 case IB_FLOW_SPEC_UDP: 2807 ib_filter_sz = sizeof(struct ib_flow_tcp_udp_filter); 2808 actual_filter_sz = spec_filter_size(kern_spec_mask, 2809 kern_filter_sz, 2810 ib_filter_sz); 2811 if (actual_filter_sz <= 0) 2812 return -EINVAL; 2813 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2814 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2815 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2816 break; 2817 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2818 ib_filter_sz = sizeof(struct ib_flow_tunnel_filter); 2819 actual_filter_sz = spec_filter_size(kern_spec_mask, 2820 kern_filter_sz, 2821 ib_filter_sz); 2822 if (actual_filter_sz <= 0) 2823 return -EINVAL; 2824 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2825 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2826 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2827 2828 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2829 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2830 return -EINVAL; 2831 break; 2832 case IB_FLOW_SPEC_ESP: 2833 ib_filter_sz = sizeof(struct ib_flow_esp_filter); 2834 actual_filter_sz = spec_filter_size(kern_spec_mask, 2835 kern_filter_sz, 2836 ib_filter_sz); 2837 if (actual_filter_sz <= 0) 2838 return -EINVAL; 2839 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2840 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2841 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2842 break; 2843 case IB_FLOW_SPEC_GRE: 2844 ib_filter_sz = sizeof(struct ib_flow_gre_filter); 2845 actual_filter_sz = spec_filter_size(kern_spec_mask, 2846 kern_filter_sz, 2847 ib_filter_sz); 2848 if (actual_filter_sz <= 0) 2849 return -EINVAL; 2850 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2851 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2852 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2853 break; 2854 case IB_FLOW_SPEC_MPLS: 2855 ib_filter_sz = sizeof(struct ib_flow_mpls_filter); 2856 actual_filter_sz = spec_filter_size(kern_spec_mask, 2857 kern_filter_sz, 2858 ib_filter_sz); 2859 if (actual_filter_sz <= 0) 2860 return -EINVAL; 2861 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2862 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2863 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2864 break; 2865 default: 2866 return -EINVAL; 2867 } 2868 return 0; 2869 } 2870 2871 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2872 union ib_flow_spec *ib_spec) 2873 { 2874 size_t kern_filter_sz; 2875 void *kern_spec_mask; 2876 void *kern_spec_val; 2877 2878 if (check_sub_overflow((size_t)kern_spec->hdr.size, 2879 sizeof(struct ib_uverbs_flow_spec_hdr), 2880 &kern_filter_sz)) 2881 return -EINVAL; 2882 2883 kern_filter_sz /= 2; 2884 2885 kern_spec_val = (void *)kern_spec + 2886 sizeof(struct ib_uverbs_flow_spec_hdr); 2887 kern_spec_mask = kern_spec_val + kern_filter_sz; 2888 2889 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2890 kern_spec_mask, 2891 kern_spec_val, 2892 kern_filter_sz, ib_spec); 2893 } 2894 2895 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2896 struct ib_uverbs_flow_spec *kern_spec, 2897 union ib_flow_spec *ib_spec, 2898 struct ib_uflow_resources *uflow_res) 2899 { 2900 if (kern_spec->reserved) 2901 return -EINVAL; 2902 2903 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2904 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2905 uflow_res); 2906 else 2907 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2908 } 2909 2910 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2911 { 2912 struct ib_uverbs_ex_create_wq cmd; 2913 struct ib_uverbs_ex_create_wq_resp resp = {}; 2914 struct ib_uwq_object *obj; 2915 int err = 0; 2916 struct ib_cq *cq; 2917 struct ib_pd *pd; 2918 struct ib_wq *wq; 2919 struct ib_wq_init_attr wq_init_attr = {}; 2920 struct ib_device *ib_dev; 2921 2922 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2923 if (err) 2924 return err; 2925 2926 if (cmd.comp_mask) 2927 return -EOPNOTSUPP; 2928 2929 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2930 &ib_dev); 2931 if (IS_ERR(obj)) 2932 return PTR_ERR(obj); 2933 2934 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2935 if (IS_ERR(pd)) { 2936 err = PTR_ERR(pd); 2937 goto err_uobj; 2938 } 2939 2940 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2941 if (IS_ERR(cq)) { 2942 err = PTR_ERR(cq); 2943 goto err_put_pd; 2944 } 2945 2946 wq_init_attr.cq = cq; 2947 wq_init_attr.max_sge = cmd.max_sge; 2948 wq_init_attr.max_wr = cmd.max_wr; 2949 wq_init_attr.wq_type = cmd.wq_type; 2950 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2951 wq_init_attr.create_flags = cmd.create_flags; 2952 INIT_LIST_HEAD(&obj->uevent.event_list); 2953 obj->uevent.uobject.user_handle = cmd.user_handle; 2954 2955 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2956 if (IS_ERR(wq)) { 2957 err = PTR_ERR(wq); 2958 goto err_put_cq; 2959 } 2960 2961 wq->uobject = obj; 2962 obj->uevent.uobject.object = wq; 2963 wq->wq_type = wq_init_attr.wq_type; 2964 wq->cq = cq; 2965 wq->pd = pd; 2966 wq->device = pd->device; 2967 atomic_set(&wq->usecnt, 0); 2968 atomic_inc(&pd->usecnt); 2969 atomic_inc(&cq->usecnt); 2970 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 2971 if (obj->uevent.event_file) 2972 uverbs_uobject_get(&obj->uevent.event_file->uobj); 2973 2974 uobj_put_obj_read(pd); 2975 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2976 UVERBS_LOOKUP_READ); 2977 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 2978 2979 resp.wq_handle = obj->uevent.uobject.id; 2980 resp.max_sge = wq_init_attr.max_sge; 2981 resp.max_wr = wq_init_attr.max_wr; 2982 resp.wqn = wq->wq_num; 2983 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2984 return uverbs_response(attrs, &resp, sizeof(resp)); 2985 2986 err_put_cq: 2987 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2988 UVERBS_LOOKUP_READ); 2989 err_put_pd: 2990 uobj_put_obj_read(pd); 2991 err_uobj: 2992 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2993 2994 return err; 2995 } 2996 2997 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2998 { 2999 struct ib_uverbs_ex_destroy_wq cmd; 3000 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 3001 struct ib_uobject *uobj; 3002 struct ib_uwq_object *obj; 3003 int ret; 3004 3005 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3006 if (ret) 3007 return ret; 3008 3009 if (cmd.comp_mask) 3010 return -EOPNOTSUPP; 3011 3012 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3013 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3014 if (IS_ERR(uobj)) 3015 return PTR_ERR(uobj); 3016 3017 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 3018 resp.events_reported = obj->uevent.events_reported; 3019 3020 uobj_put_destroy(uobj); 3021 3022 return uverbs_response(attrs, &resp, sizeof(resp)); 3023 } 3024 3025 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 3026 { 3027 struct ib_uverbs_ex_modify_wq cmd; 3028 struct ib_wq *wq; 3029 struct ib_wq_attr wq_attr = {}; 3030 int ret; 3031 3032 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3033 if (ret) 3034 return ret; 3035 3036 if (!cmd.attr_mask) 3037 return -EINVAL; 3038 3039 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3040 return -EINVAL; 3041 3042 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3043 if (IS_ERR(wq)) 3044 return PTR_ERR(wq); 3045 3046 if (cmd.attr_mask & IB_WQ_FLAGS) { 3047 wq_attr.flags = cmd.flags; 3048 wq_attr.flags_mask = cmd.flags_mask; 3049 } 3050 3051 if (cmd.attr_mask & IB_WQ_CUR_STATE) { 3052 if (cmd.curr_wq_state > IB_WQS_ERR) 3053 return -EINVAL; 3054 3055 wq_attr.curr_wq_state = cmd.curr_wq_state; 3056 } else { 3057 wq_attr.curr_wq_state = wq->state; 3058 } 3059 3060 if (cmd.attr_mask & IB_WQ_STATE) { 3061 if (cmd.wq_state > IB_WQS_ERR) 3062 return -EINVAL; 3063 3064 wq_attr.wq_state = cmd.wq_state; 3065 } else { 3066 wq_attr.wq_state = wq_attr.curr_wq_state; 3067 } 3068 3069 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3070 &attrs->driver_udata); 3071 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, 3072 UVERBS_LOOKUP_READ); 3073 return ret; 3074 } 3075 3076 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3077 { 3078 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3079 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3080 struct ib_uobject *uobj; 3081 int err; 3082 struct ib_rwq_ind_table_init_attr init_attr = {}; 3083 struct ib_rwq_ind_table *rwq_ind_tbl; 3084 struct ib_wq **wqs = NULL; 3085 u32 *wqs_handles = NULL; 3086 struct ib_wq *wq = NULL; 3087 int i, num_read_wqs; 3088 u32 num_wq_handles; 3089 struct uverbs_req_iter iter; 3090 struct ib_device *ib_dev; 3091 3092 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3093 if (err) 3094 return err; 3095 3096 if (cmd.comp_mask) 3097 return -EOPNOTSUPP; 3098 3099 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3100 return -EINVAL; 3101 3102 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3103 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3104 GFP_KERNEL); 3105 if (!wqs_handles) 3106 return -ENOMEM; 3107 3108 err = uverbs_request_next(&iter, wqs_handles, 3109 num_wq_handles * sizeof(__u32)); 3110 if (err) 3111 goto err_free; 3112 3113 err = uverbs_request_finish(&iter); 3114 if (err) 3115 goto err_free; 3116 3117 wqs = kzalloc_objs(*wqs, num_wq_handles); 3118 if (!wqs) { 3119 err = -ENOMEM; 3120 goto err_free; 3121 } 3122 3123 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3124 num_read_wqs++) { 3125 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3126 wqs_handles[num_read_wqs], attrs); 3127 if (IS_ERR(wq)) { 3128 err = PTR_ERR(wq); 3129 goto put_wqs; 3130 } 3131 3132 wqs[num_read_wqs] = wq; 3133 atomic_inc(&wqs[num_read_wqs]->usecnt); 3134 } 3135 3136 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3137 if (IS_ERR(uobj)) { 3138 err = PTR_ERR(uobj); 3139 goto put_wqs; 3140 } 3141 3142 rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table); 3143 if (!rwq_ind_tbl) { 3144 err = -ENOMEM; 3145 goto err_uobj; 3146 } 3147 3148 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3149 init_attr.ind_tbl = wqs; 3150 3151 rwq_ind_tbl->ind_tbl = wqs; 3152 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3153 rwq_ind_tbl->uobject = uobj; 3154 uobj->object = rwq_ind_tbl; 3155 rwq_ind_tbl->device = ib_dev; 3156 atomic_set(&rwq_ind_tbl->usecnt, 0); 3157 3158 err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr, 3159 &attrs->driver_udata); 3160 if (err) 3161 goto err_create; 3162 3163 for (i = 0; i < num_wq_handles; i++) 3164 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3165 UVERBS_LOOKUP_READ); 3166 kfree(wqs_handles); 3167 uobj_finalize_uobj_create(uobj, attrs); 3168 3169 resp.ind_tbl_handle = uobj->id; 3170 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3171 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3172 return uverbs_response(attrs, &resp, sizeof(resp)); 3173 3174 err_create: 3175 kfree(rwq_ind_tbl); 3176 err_uobj: 3177 uobj_alloc_abort(uobj, attrs); 3178 put_wqs: 3179 for (i = 0; i < num_read_wqs; i++) { 3180 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3181 UVERBS_LOOKUP_READ); 3182 atomic_dec(&wqs[i]->usecnt); 3183 } 3184 err_free: 3185 kfree(wqs_handles); 3186 kfree(wqs); 3187 return err; 3188 } 3189 3190 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3191 { 3192 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3193 int ret; 3194 3195 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3196 if (ret) 3197 return ret; 3198 3199 if (cmd.comp_mask) 3200 return -EOPNOTSUPP; 3201 3202 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3203 cmd.ind_tbl_handle, attrs); 3204 } 3205 3206 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3207 { 3208 struct ib_uverbs_create_flow cmd; 3209 struct ib_uverbs_create_flow_resp resp = {}; 3210 struct ib_uobject *uobj; 3211 struct ib_flow *flow_id; 3212 struct ib_uverbs_flow_attr *kern_flow_attr; 3213 struct ib_flow_attr *flow_attr; 3214 struct ib_qp *qp; 3215 struct ib_uflow_resources *uflow_res; 3216 struct ib_uverbs_flow_spec_hdr *kern_spec; 3217 struct uverbs_req_iter iter; 3218 int err; 3219 void *ib_spec; 3220 int i; 3221 struct ib_device *ib_dev; 3222 3223 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3224 if (err) 3225 return err; 3226 3227 if (cmd.comp_mask) 3228 return -EINVAL; 3229 3230 if (!rdma_uattrs_has_raw_cap(attrs)) 3231 return -EPERM; 3232 3233 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3234 return -EINVAL; 3235 3236 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3237 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3238 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3239 return -EINVAL; 3240 3241 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3242 return -EINVAL; 3243 3244 if (cmd.flow_attr.size > 3245 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3246 return -EINVAL; 3247 3248 if (cmd.flow_attr.reserved[0] || 3249 cmd.flow_attr.reserved[1]) 3250 return -EINVAL; 3251 3252 if (cmd.flow_attr.num_of_specs) { 3253 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3254 GFP_KERNEL); 3255 if (!kern_flow_attr) 3256 return -ENOMEM; 3257 3258 *kern_flow_attr = cmd.flow_attr; 3259 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3260 cmd.flow_attr.size); 3261 if (err) 3262 goto err_free_attr; 3263 } else { 3264 kern_flow_attr = &cmd.flow_attr; 3265 } 3266 3267 err = uverbs_request_finish(&iter); 3268 if (err) 3269 goto err_free_attr; 3270 3271 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3272 if (IS_ERR(uobj)) { 3273 err = PTR_ERR(uobj); 3274 goto err_free_attr; 3275 } 3276 3277 if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) { 3278 err = -EINVAL; 3279 goto err_uobj; 3280 } 3281 3282 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3283 if (IS_ERR(qp)) { 3284 err = PTR_ERR(qp); 3285 goto err_uobj; 3286 } 3287 3288 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3289 err = -EINVAL; 3290 goto err_put; 3291 } 3292 3293 flow_attr = kzalloc_flex(*flow_attr, flows, cmd.flow_attr.num_of_specs); 3294 if (!flow_attr) { 3295 err = -ENOMEM; 3296 goto err_put; 3297 } 3298 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3299 if (!uflow_res) { 3300 err = -ENOMEM; 3301 goto err_free_flow_attr; 3302 } 3303 3304 flow_attr->type = kern_flow_attr->type; 3305 flow_attr->priority = kern_flow_attr->priority; 3306 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3307 flow_attr->port = kern_flow_attr->port; 3308 flow_attr->flags = kern_flow_attr->flags; 3309 flow_attr->size = sizeof(*flow_attr); 3310 3311 kern_spec = kern_flow_attr->flow_specs; 3312 ib_spec = flow_attr + 1; 3313 for (i = 0; i < flow_attr->num_of_specs && 3314 cmd.flow_attr.size >= sizeof(*kern_spec) && 3315 cmd.flow_attr.size >= kern_spec->size; 3316 i++) { 3317 err = kern_spec_to_ib_spec( 3318 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3319 ib_spec, uflow_res); 3320 if (err) 3321 goto err_free; 3322 3323 flow_attr->size += 3324 ((union ib_flow_spec *) ib_spec)->size; 3325 cmd.flow_attr.size -= kern_spec->size; 3326 kern_spec = ((void *)kern_spec) + kern_spec->size; 3327 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3328 } 3329 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3330 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n", 3331 i, cmd.flow_attr.size); 3332 err = -EINVAL; 3333 goto err_free; 3334 } 3335 3336 flow_id = qp->device->ops.create_flow(qp, flow_attr, 3337 &attrs->driver_udata); 3338 3339 if (IS_ERR(flow_id)) { 3340 err = PTR_ERR(flow_id); 3341 goto err_free; 3342 } 3343 3344 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3345 3346 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3347 UVERBS_LOOKUP_READ); 3348 kfree(flow_attr); 3349 3350 if (cmd.flow_attr.num_of_specs) 3351 kfree(kern_flow_attr); 3352 uobj_finalize_uobj_create(uobj, attrs); 3353 3354 resp.flow_handle = uobj->id; 3355 return uverbs_response(attrs, &resp, sizeof(resp)); 3356 3357 err_free: 3358 ib_uverbs_flow_resources_free(uflow_res); 3359 err_free_flow_attr: 3360 kfree(flow_attr); 3361 err_put: 3362 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3363 UVERBS_LOOKUP_READ); 3364 err_uobj: 3365 uobj_alloc_abort(uobj, attrs); 3366 err_free_attr: 3367 if (cmd.flow_attr.num_of_specs) 3368 kfree(kern_flow_attr); 3369 return err; 3370 } 3371 3372 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3373 { 3374 struct ib_uverbs_destroy_flow cmd; 3375 int ret; 3376 3377 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3378 if (ret) 3379 return ret; 3380 3381 if (cmd.comp_mask) 3382 return -EINVAL; 3383 3384 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3385 } 3386 3387 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3388 struct ib_uverbs_create_xsrq *cmd, 3389 struct ib_udata *udata) 3390 { 3391 struct ib_uverbs_create_srq_resp resp = {}; 3392 struct ib_usrq_object *obj; 3393 struct ib_pd *pd; 3394 struct ib_srq *srq; 3395 struct ib_srq_init_attr attr; 3396 int ret; 3397 struct ib_uobject *xrcd_uobj; 3398 struct ib_device *ib_dev; 3399 3400 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3401 &ib_dev); 3402 if (IS_ERR(obj)) 3403 return PTR_ERR(obj); 3404 3405 if (cmd->srq_type == IB_SRQT_TM) 3406 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3407 3408 if (cmd->srq_type == IB_SRQT_XRC) { 3409 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3410 attrs); 3411 if (IS_ERR(xrcd_uobj)) { 3412 ret = -EINVAL; 3413 goto err; 3414 } 3415 3416 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3417 if (!attr.ext.xrc.xrcd) { 3418 ret = -EINVAL; 3419 goto err_put_xrcd; 3420 } 3421 3422 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3423 atomic_inc(&obj->uxrcd->refcnt); 3424 } 3425 3426 if (ib_srq_has_cq(cmd->srq_type)) { 3427 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3428 cmd->cq_handle, attrs); 3429 if (IS_ERR(attr.ext.cq)) { 3430 ret = PTR_ERR(attr.ext.cq); 3431 goto err_put_xrcd; 3432 } 3433 } 3434 3435 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3436 if (IS_ERR(pd)) { 3437 ret = PTR_ERR(pd); 3438 goto err_put_cq; 3439 } 3440 3441 attr.event_handler = ib_uverbs_srq_event_handler; 3442 attr.srq_type = cmd->srq_type; 3443 attr.attr.max_wr = cmd->max_wr; 3444 attr.attr.max_sge = cmd->max_sge; 3445 attr.attr.srq_limit = cmd->srq_limit; 3446 3447 INIT_LIST_HEAD(&obj->uevent.event_list); 3448 obj->uevent.uobject.user_handle = cmd->user_handle; 3449 3450 srq = ib_create_srq_user(pd, &attr, obj, udata); 3451 if (IS_ERR(srq)) { 3452 ret = PTR_ERR(srq); 3453 goto err_put_pd; 3454 } 3455 3456 obj->uevent.uobject.object = srq; 3457 obj->uevent.uobject.user_handle = cmd->user_handle; 3458 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 3459 if (obj->uevent.event_file) 3460 uverbs_uobject_get(&obj->uevent.event_file->uobj); 3461 3462 if (cmd->srq_type == IB_SRQT_XRC) 3463 resp.srqn = srq->ext.xrc.srq_num; 3464 3465 if (cmd->srq_type == IB_SRQT_XRC) 3466 uobj_put_read(xrcd_uobj); 3467 3468 if (ib_srq_has_cq(cmd->srq_type)) 3469 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3470 UVERBS_LOOKUP_READ); 3471 3472 uobj_put_obj_read(pd); 3473 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 3474 3475 resp.srq_handle = obj->uevent.uobject.id; 3476 resp.max_wr = attr.attr.max_wr; 3477 resp.max_sge = attr.attr.max_sge; 3478 return uverbs_response(attrs, &resp, sizeof(resp)); 3479 3480 err_put_pd: 3481 uobj_put_obj_read(pd); 3482 err_put_cq: 3483 if (ib_srq_has_cq(cmd->srq_type)) 3484 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3485 UVERBS_LOOKUP_READ); 3486 3487 err_put_xrcd: 3488 if (cmd->srq_type == IB_SRQT_XRC) { 3489 atomic_dec(&obj->uxrcd->refcnt); 3490 uobj_put_read(xrcd_uobj); 3491 } 3492 3493 err: 3494 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3495 return ret; 3496 } 3497 3498 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3499 { 3500 struct ib_uverbs_create_srq cmd; 3501 struct ib_uverbs_create_xsrq xcmd; 3502 int ret; 3503 3504 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3505 if (ret) 3506 return ret; 3507 3508 memset(&xcmd, 0, sizeof(xcmd)); 3509 xcmd.response = cmd.response; 3510 xcmd.user_handle = cmd.user_handle; 3511 xcmd.srq_type = IB_SRQT_BASIC; 3512 xcmd.pd_handle = cmd.pd_handle; 3513 xcmd.max_wr = cmd.max_wr; 3514 xcmd.max_sge = cmd.max_sge; 3515 xcmd.srq_limit = cmd.srq_limit; 3516 3517 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3518 } 3519 3520 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3521 { 3522 struct ib_uverbs_create_xsrq cmd; 3523 int ret; 3524 3525 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3526 if (ret) 3527 return ret; 3528 3529 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3530 } 3531 3532 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3533 { 3534 struct ib_uverbs_modify_srq cmd; 3535 struct ib_srq *srq; 3536 struct ib_srq_attr attr; 3537 int ret; 3538 3539 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3540 if (ret) 3541 return ret; 3542 3543 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3544 if (IS_ERR(srq)) 3545 return PTR_ERR(srq); 3546 3547 attr.max_wr = cmd.max_wr; 3548 attr.srq_limit = cmd.srq_limit; 3549 3550 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3551 &attrs->driver_udata); 3552 3553 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3554 UVERBS_LOOKUP_READ); 3555 3556 return ret; 3557 } 3558 3559 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3560 { 3561 struct ib_uverbs_query_srq cmd; 3562 struct ib_uverbs_query_srq_resp resp; 3563 struct ib_srq_attr attr; 3564 struct ib_srq *srq; 3565 int ret; 3566 3567 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3568 if (ret) 3569 return ret; 3570 3571 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3572 if (IS_ERR(srq)) 3573 return PTR_ERR(srq); 3574 3575 ret = ib_query_srq(srq, &attr); 3576 3577 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3578 UVERBS_LOOKUP_READ); 3579 3580 if (ret) 3581 return ret; 3582 3583 memset(&resp, 0, sizeof resp); 3584 3585 resp.max_wr = attr.max_wr; 3586 resp.max_sge = attr.max_sge; 3587 resp.srq_limit = attr.srq_limit; 3588 3589 return uverbs_response(attrs, &resp, sizeof(resp)); 3590 } 3591 3592 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3593 { 3594 struct ib_uverbs_destroy_srq cmd; 3595 struct ib_uverbs_destroy_srq_resp resp; 3596 struct ib_uobject *uobj; 3597 struct ib_uevent_object *obj; 3598 int ret; 3599 3600 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3601 if (ret) 3602 return ret; 3603 3604 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3605 if (IS_ERR(uobj)) 3606 return PTR_ERR(uobj); 3607 3608 obj = container_of(uobj, struct ib_uevent_object, uobject); 3609 memset(&resp, 0, sizeof(resp)); 3610 resp.events_reported = obj->events_reported; 3611 3612 uobj_put_destroy(uobj); 3613 3614 return uverbs_response(attrs, &resp, sizeof(resp)); 3615 } 3616 3617 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3618 { 3619 struct ib_uverbs_ex_query_device_resp resp = {}; 3620 struct ib_uverbs_ex_query_device cmd; 3621 struct ib_device_attr attr = {0}; 3622 struct ib_ucontext *ucontext; 3623 struct ib_device *ib_dev; 3624 int err; 3625 3626 ucontext = ib_uverbs_get_ucontext(attrs); 3627 if (IS_ERR(ucontext)) 3628 return PTR_ERR(ucontext); 3629 ib_dev = ucontext->device; 3630 3631 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3632 if (err) 3633 return err; 3634 3635 if (cmd.comp_mask) 3636 return -EINVAL; 3637 3638 if (cmd.reserved) 3639 return -EINVAL; 3640 3641 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3642 if (err) 3643 return err; 3644 3645 copy_query_dev_fields(ucontext, &resp.base, &attr); 3646 3647 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3648 resp.odp_caps.per_transport_caps.rc_odp_caps = 3649 attr.odp_caps.per_transport_caps.rc_odp_caps; 3650 resp.odp_caps.per_transport_caps.uc_odp_caps = 3651 attr.odp_caps.per_transport_caps.uc_odp_caps; 3652 resp.odp_caps.per_transport_caps.ud_odp_caps = 3653 attr.odp_caps.per_transport_caps.ud_odp_caps; 3654 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3655 3656 resp.timestamp_mask = attr.timestamp_mask; 3657 resp.hca_core_clock = attr.hca_core_clock; 3658 resp.device_cap_flags_ex = attr.device_cap_flags; 3659 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3660 resp.rss_caps.max_rwq_indirection_tables = 3661 attr.rss_caps.max_rwq_indirection_tables; 3662 resp.rss_caps.max_rwq_indirection_table_size = 3663 attr.rss_caps.max_rwq_indirection_table_size; 3664 resp.max_wq_type_rq = attr.max_wq_type_rq; 3665 resp.raw_packet_caps = attr.raw_packet_caps; 3666 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3667 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3668 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3669 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3670 resp.tm_caps.flags = attr.tm_caps.flags; 3671 resp.cq_moderation_caps.max_cq_moderation_count = 3672 attr.cq_caps.max_cq_moderation_count; 3673 resp.cq_moderation_caps.max_cq_moderation_period = 3674 attr.cq_caps.max_cq_moderation_period; 3675 resp.max_dm_size = attr.max_dm_size; 3676 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3677 3678 return uverbs_response(attrs, &resp, sizeof(resp)); 3679 } 3680 3681 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3682 { 3683 struct ib_uverbs_ex_modify_cq cmd; 3684 struct ib_cq *cq; 3685 int ret; 3686 3687 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3688 if (ret) 3689 return ret; 3690 3691 if (!cmd.attr_mask || cmd.reserved) 3692 return -EINVAL; 3693 3694 if (cmd.attr_mask > IB_CQ_MODERATE) 3695 return -EOPNOTSUPP; 3696 3697 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3698 if (IS_ERR(cq)) 3699 return PTR_ERR(cq); 3700 3701 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3702 3703 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3704 UVERBS_LOOKUP_READ); 3705 return ret; 3706 } 3707 3708 /* 3709 * Describe the input structs for write(). Some write methods have an input 3710 * only struct, most have an input and output. If the struct has an output then 3711 * the 'response' u64 must be the first field in the request structure. 3712 * 3713 * If udata is present then both the request and response structs have a 3714 * trailing driver_data flex array. In this case the size of the base struct 3715 * cannot be changed. 3716 */ 3717 #define UAPI_DEF_WRITE_IO(req, resp) \ 3718 .write.has_resp = 1 + \ 3719 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3720 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \ 3721 sizeof(u64)), \ 3722 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3723 3724 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3725 3726 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3727 UAPI_DEF_WRITE_IO(req, resp), \ 3728 .write.has_udata = \ 3729 1 + \ 3730 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3731 sizeof(req)) + \ 3732 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3733 sizeof(resp)) 3734 3735 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3736 UAPI_DEF_WRITE_I(req), \ 3737 .write.has_udata = \ 3738 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3739 sizeof(req)) 3740 3741 /* 3742 * The _EX versions are for use with WRITE_EX and allow the last struct member 3743 * to be specified. Buffers that do not include that member will be rejected. 3744 */ 3745 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3746 .write.has_resp = 1, \ 3747 .write.req_size = offsetofend(req, req_last_member), \ 3748 .write.resp_size = offsetofend(resp, resp_last_member) 3749 3750 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3751 .write.req_size = offsetofend(req, req_last_member) 3752 3753 const struct uapi_definition uverbs_def_write_intf[] = { 3754 DECLARE_UVERBS_OBJECT( 3755 UVERBS_OBJECT_AH, 3756 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3757 ib_uverbs_create_ah, 3758 UAPI_DEF_WRITE_UDATA_IO( 3759 struct ib_uverbs_create_ah, 3760 struct ib_uverbs_create_ah_resp)), 3761 DECLARE_UVERBS_WRITE( 3762 IB_USER_VERBS_CMD_DESTROY_AH, 3763 ib_uverbs_destroy_ah, 3764 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)), 3765 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah), 3766 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)), 3767 3768 DECLARE_UVERBS_OBJECT( 3769 UVERBS_OBJECT_COMP_CHANNEL, 3770 DECLARE_UVERBS_WRITE( 3771 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3772 ib_uverbs_create_comp_channel, 3773 UAPI_DEF_WRITE_IO( 3774 struct ib_uverbs_create_comp_channel, 3775 struct ib_uverbs_create_comp_channel_resp))), 3776 3777 DECLARE_UVERBS_OBJECT( 3778 UVERBS_OBJECT_CQ, 3779 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3780 ib_uverbs_create_cq, 3781 UAPI_DEF_WRITE_UDATA_IO( 3782 struct ib_uverbs_create_cq, 3783 struct ib_uverbs_create_cq_resp), 3784 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3785 DECLARE_UVERBS_WRITE( 3786 IB_USER_VERBS_CMD_DESTROY_CQ, 3787 ib_uverbs_destroy_cq, 3788 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3789 struct ib_uverbs_destroy_cq_resp), 3790 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3791 DECLARE_UVERBS_WRITE( 3792 IB_USER_VERBS_CMD_POLL_CQ, 3793 ib_uverbs_poll_cq, 3794 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3795 struct ib_uverbs_poll_cq_resp), 3796 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3797 DECLARE_UVERBS_WRITE( 3798 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3799 ib_uverbs_req_notify_cq, 3800 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3801 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3802 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3803 ib_uverbs_resize_cq, 3804 UAPI_DEF_WRITE_UDATA_IO( 3805 struct ib_uverbs_resize_cq, 3806 struct ib_uverbs_resize_cq_resp), 3807 UAPI_DEF_METHOD_NEEDS_FN(resize_user_cq)), 3808 DECLARE_UVERBS_WRITE_EX( 3809 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3810 ib_uverbs_ex_create_cq, 3811 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3812 reserved, 3813 struct ib_uverbs_ex_create_cq_resp, 3814 response_length), 3815 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3816 DECLARE_UVERBS_WRITE_EX( 3817 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3818 ib_uverbs_ex_modify_cq, 3819 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3820 UAPI_DEF_METHOD_NEEDS_FN(modify_cq))), 3821 3822 DECLARE_UVERBS_OBJECT( 3823 UVERBS_OBJECT_DEVICE, 3824 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3825 ib_uverbs_get_context, 3826 UAPI_DEF_WRITE_UDATA_IO( 3827 struct ib_uverbs_get_context, 3828 struct ib_uverbs_get_context_resp)), 3829 DECLARE_UVERBS_WRITE( 3830 IB_USER_VERBS_CMD_QUERY_DEVICE, 3831 ib_uverbs_query_device, 3832 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3833 struct ib_uverbs_query_device_resp)), 3834 DECLARE_UVERBS_WRITE( 3835 IB_USER_VERBS_CMD_QUERY_PORT, 3836 ib_uverbs_query_port, 3837 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3838 struct ib_uverbs_query_port_resp), 3839 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3840 DECLARE_UVERBS_WRITE_EX( 3841 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3842 ib_uverbs_ex_query_device, 3843 UAPI_DEF_WRITE_IO_EX( 3844 struct ib_uverbs_ex_query_device, 3845 reserved, 3846 struct ib_uverbs_ex_query_device_resp, 3847 response_length), 3848 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3849 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3850 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3851 3852 DECLARE_UVERBS_OBJECT( 3853 UVERBS_OBJECT_FLOW, 3854 DECLARE_UVERBS_WRITE_EX( 3855 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3856 ib_uverbs_ex_create_flow, 3857 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3858 flow_attr, 3859 struct ib_uverbs_create_flow_resp, 3860 flow_handle), 3861 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3862 DECLARE_UVERBS_WRITE_EX( 3863 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3864 ib_uverbs_ex_destroy_flow, 3865 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3866 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3867 3868 DECLARE_UVERBS_OBJECT( 3869 UVERBS_OBJECT_MR, 3870 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3871 ib_uverbs_dereg_mr, 3872 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3873 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3874 DECLARE_UVERBS_WRITE( 3875 IB_USER_VERBS_CMD_REG_MR, 3876 ib_uverbs_reg_mr, 3877 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3878 struct ib_uverbs_reg_mr_resp), 3879 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3880 DECLARE_UVERBS_WRITE( 3881 IB_USER_VERBS_CMD_REREG_MR, 3882 ib_uverbs_rereg_mr, 3883 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3884 struct ib_uverbs_rereg_mr_resp), 3885 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3886 3887 DECLARE_UVERBS_OBJECT( 3888 UVERBS_OBJECT_MW, 3889 DECLARE_UVERBS_WRITE( 3890 IB_USER_VERBS_CMD_ALLOC_MW, 3891 ib_uverbs_alloc_mw, 3892 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3893 struct ib_uverbs_alloc_mw_resp), 3894 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3895 DECLARE_UVERBS_WRITE( 3896 IB_USER_VERBS_CMD_DEALLOC_MW, 3897 ib_uverbs_dealloc_mw, 3898 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3899 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3900 3901 DECLARE_UVERBS_OBJECT( 3902 UVERBS_OBJECT_PD, 3903 DECLARE_UVERBS_WRITE( 3904 IB_USER_VERBS_CMD_ALLOC_PD, 3905 ib_uverbs_alloc_pd, 3906 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3907 struct ib_uverbs_alloc_pd_resp), 3908 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3909 DECLARE_UVERBS_WRITE( 3910 IB_USER_VERBS_CMD_DEALLOC_PD, 3911 ib_uverbs_dealloc_pd, 3912 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3913 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3914 3915 DECLARE_UVERBS_OBJECT( 3916 UVERBS_OBJECT_QP, 3917 DECLARE_UVERBS_WRITE( 3918 IB_USER_VERBS_CMD_ATTACH_MCAST, 3919 ib_uverbs_attach_mcast, 3920 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3921 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3922 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3923 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3924 ib_uverbs_create_qp, 3925 UAPI_DEF_WRITE_UDATA_IO( 3926 struct ib_uverbs_create_qp, 3927 struct ib_uverbs_create_qp_resp), 3928 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3929 DECLARE_UVERBS_WRITE( 3930 IB_USER_VERBS_CMD_DESTROY_QP, 3931 ib_uverbs_destroy_qp, 3932 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3933 struct ib_uverbs_destroy_qp_resp), 3934 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3935 DECLARE_UVERBS_WRITE( 3936 IB_USER_VERBS_CMD_DETACH_MCAST, 3937 ib_uverbs_detach_mcast, 3938 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3939 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3940 DECLARE_UVERBS_WRITE( 3941 IB_USER_VERBS_CMD_MODIFY_QP, 3942 ib_uverbs_modify_qp, 3943 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3944 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3945 DECLARE_UVERBS_WRITE( 3946 IB_USER_VERBS_CMD_POST_RECV, 3947 ib_uverbs_post_recv, 3948 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3949 struct ib_uverbs_post_recv_resp), 3950 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3951 DECLARE_UVERBS_WRITE( 3952 IB_USER_VERBS_CMD_POST_SEND, 3953 ib_uverbs_post_send, 3954 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3955 struct ib_uverbs_post_send_resp), 3956 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3957 DECLARE_UVERBS_WRITE( 3958 IB_USER_VERBS_CMD_QUERY_QP, 3959 ib_uverbs_query_qp, 3960 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3961 struct ib_uverbs_query_qp_resp), 3962 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3963 DECLARE_UVERBS_WRITE_EX( 3964 IB_USER_VERBS_EX_CMD_CREATE_QP, 3965 ib_uverbs_ex_create_qp, 3966 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3967 comp_mask, 3968 struct ib_uverbs_ex_create_qp_resp, 3969 response_length), 3970 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3971 DECLARE_UVERBS_WRITE_EX( 3972 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3973 ib_uverbs_ex_modify_qp, 3974 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3975 base, 3976 struct ib_uverbs_ex_modify_qp_resp, 3977 response_length), 3978 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3979 3980 DECLARE_UVERBS_OBJECT( 3981 UVERBS_OBJECT_RWQ_IND_TBL, 3982 DECLARE_UVERBS_WRITE_EX( 3983 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3984 ib_uverbs_ex_create_rwq_ind_table, 3985 UAPI_DEF_WRITE_IO_EX( 3986 struct ib_uverbs_ex_create_rwq_ind_table, 3987 log_ind_tbl_size, 3988 struct ib_uverbs_ex_create_rwq_ind_table_resp, 3989 ind_tbl_num), 3990 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 3991 DECLARE_UVERBS_WRITE_EX( 3992 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 3993 ib_uverbs_ex_destroy_rwq_ind_table, 3994 UAPI_DEF_WRITE_I( 3995 struct ib_uverbs_ex_destroy_rwq_ind_table), 3996 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 3997 3998 DECLARE_UVERBS_OBJECT( 3999 UVERBS_OBJECT_WQ, 4000 DECLARE_UVERBS_WRITE_EX( 4001 IB_USER_VERBS_EX_CMD_CREATE_WQ, 4002 ib_uverbs_ex_create_wq, 4003 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 4004 max_sge, 4005 struct ib_uverbs_ex_create_wq_resp, 4006 wqn), 4007 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 4008 DECLARE_UVERBS_WRITE_EX( 4009 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 4010 ib_uverbs_ex_destroy_wq, 4011 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 4012 wq_handle, 4013 struct ib_uverbs_ex_destroy_wq_resp, 4014 reserved), 4015 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 4016 DECLARE_UVERBS_WRITE_EX( 4017 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 4018 ib_uverbs_ex_modify_wq, 4019 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 4020 curr_wq_state), 4021 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 4022 4023 DECLARE_UVERBS_OBJECT( 4024 UVERBS_OBJECT_SRQ, 4025 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 4026 ib_uverbs_create_srq, 4027 UAPI_DEF_WRITE_UDATA_IO( 4028 struct ib_uverbs_create_srq, 4029 struct ib_uverbs_create_srq_resp), 4030 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4031 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 4032 ib_uverbs_create_xsrq, 4033 UAPI_DEF_WRITE_UDATA_IO( 4034 struct ib_uverbs_create_xsrq, 4035 struct ib_uverbs_create_srq_resp), 4036 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4037 DECLARE_UVERBS_WRITE( 4038 IB_USER_VERBS_CMD_DESTROY_SRQ, 4039 ib_uverbs_destroy_srq, 4040 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4041 struct ib_uverbs_destroy_srq_resp), 4042 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4043 DECLARE_UVERBS_WRITE( 4044 IB_USER_VERBS_CMD_MODIFY_SRQ, 4045 ib_uverbs_modify_srq, 4046 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4047 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4048 DECLARE_UVERBS_WRITE( 4049 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4050 ib_uverbs_post_srq_recv, 4051 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4052 struct ib_uverbs_post_srq_recv_resp), 4053 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4054 DECLARE_UVERBS_WRITE( 4055 IB_USER_VERBS_CMD_QUERY_SRQ, 4056 ib_uverbs_query_srq, 4057 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4058 struct ib_uverbs_query_srq_resp), 4059 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4060 4061 DECLARE_UVERBS_OBJECT( 4062 UVERBS_OBJECT_XRCD, 4063 DECLARE_UVERBS_WRITE( 4064 IB_USER_VERBS_CMD_CLOSE_XRCD, 4065 ib_uverbs_close_xrcd, 4066 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)), 4067 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4068 ib_uverbs_open_qp, 4069 UAPI_DEF_WRITE_UDATA_IO( 4070 struct ib_uverbs_open_qp, 4071 struct ib_uverbs_create_qp_resp)), 4072 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4073 ib_uverbs_open_xrcd, 4074 UAPI_DEF_WRITE_UDATA_IO( 4075 struct ib_uverbs_open_xrcd, 4076 struct ib_uverbs_open_xrcd_resp)), 4077 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd), 4078 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)), 4079 4080 {}, 4081 }; 4082