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 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1142 if (IS_ERR(cq)) 1143 return PTR_ERR(cq); 1144 1145 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); 1146 if (ret) 1147 goto out; 1148 1149 resp.cqe = cq->cqe; 1150 1151 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1152 out: 1153 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1154 UVERBS_LOOKUP_READ); 1155 1156 return ret; 1157 } 1158 1159 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1160 struct ib_wc *wc) 1161 { 1162 struct ib_uverbs_wc tmp; 1163 1164 tmp.wr_id = wc->wr_id; 1165 tmp.status = wc->status; 1166 tmp.opcode = wc->opcode; 1167 tmp.vendor_err = wc->vendor_err; 1168 tmp.byte_len = wc->byte_len; 1169 tmp.ex.imm_data = wc->ex.imm_data; 1170 tmp.qp_num = wc->qp->qp_num; 1171 tmp.src_qp = wc->src_qp; 1172 tmp.wc_flags = wc->wc_flags; 1173 tmp.pkey_index = wc->pkey_index; 1174 if (rdma_cap_opa_ah(ib_dev, wc->port_num)) 1175 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); 1176 else 1177 tmp.slid = ib_lid_cpu16(wc->slid); 1178 tmp.sl = wc->sl; 1179 tmp.dlid_path_bits = wc->dlid_path_bits; 1180 tmp.port_num = wc->port_num; 1181 tmp.reserved = 0; 1182 1183 if (copy_to_user(dest, &tmp, sizeof tmp)) 1184 return -EFAULT; 1185 1186 return 0; 1187 } 1188 1189 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1190 { 1191 struct ib_uverbs_poll_cq cmd; 1192 struct ib_uverbs_poll_cq_resp resp; 1193 u8 __user *header_ptr; 1194 u8 __user *data_ptr; 1195 struct ib_cq *cq; 1196 struct ib_wc wc; 1197 int ret; 1198 1199 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1200 if (ret) 1201 return ret; 1202 1203 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1204 if (IS_ERR(cq)) 1205 return PTR_ERR(cq); 1206 1207 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1208 header_ptr = attrs->ucore.outbuf; 1209 data_ptr = header_ptr + sizeof resp; 1210 1211 memset(&resp, 0, sizeof resp); 1212 while (resp.count < cmd.ne) { 1213 ret = ib_poll_cq(cq, 1, &wc); 1214 if (ret < 0) 1215 goto out_put; 1216 if (!ret) 1217 break; 1218 1219 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1220 if (ret) 1221 goto out_put; 1222 1223 data_ptr += sizeof(struct ib_uverbs_wc); 1224 ++resp.count; 1225 } 1226 1227 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1228 ret = -EFAULT; 1229 goto out_put; 1230 } 1231 ret = 0; 1232 1233 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1234 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1235 1236 out_put: 1237 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1238 UVERBS_LOOKUP_READ); 1239 return ret; 1240 } 1241 1242 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1243 { 1244 struct ib_uverbs_req_notify_cq cmd; 1245 struct ib_cq *cq; 1246 int ret; 1247 1248 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1249 if (ret) 1250 return ret; 1251 1252 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1253 if (IS_ERR(cq)) 1254 return PTR_ERR(cq); 1255 1256 ib_req_notify_cq(cq, cmd.solicited_only ? 1257 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1258 1259 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1260 UVERBS_LOOKUP_READ); 1261 return 0; 1262 } 1263 1264 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1265 { 1266 struct ib_uverbs_destroy_cq cmd; 1267 struct ib_uverbs_destroy_cq_resp resp; 1268 struct ib_uobject *uobj; 1269 struct ib_ucq_object *obj; 1270 int ret; 1271 1272 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1273 if (ret) 1274 return ret; 1275 1276 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1277 if (IS_ERR(uobj)) 1278 return PTR_ERR(uobj); 1279 1280 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject); 1281 memset(&resp, 0, sizeof(resp)); 1282 resp.comp_events_reported = obj->comp_events_reported; 1283 resp.async_events_reported = obj->uevent.events_reported; 1284 1285 uobj_put_destroy(uobj); 1286 1287 return uverbs_response(attrs, &resp, sizeof(resp)); 1288 } 1289 1290 static int create_qp(struct uverbs_attr_bundle *attrs, 1291 struct ib_uverbs_ex_create_qp *cmd) 1292 { 1293 struct ib_uqp_object *obj; 1294 struct ib_device *device; 1295 struct ib_pd *pd = NULL; 1296 struct ib_xrcd *xrcd = NULL; 1297 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1298 struct ib_cq *scq = NULL, *rcq = NULL; 1299 struct ib_srq *srq = NULL; 1300 struct ib_qp *qp; 1301 struct ib_qp_init_attr attr = {}; 1302 struct ib_uverbs_ex_create_qp_resp resp = {}; 1303 int ret; 1304 struct ib_rwq_ind_table *ind_tbl = NULL; 1305 bool has_sq = true; 1306 struct ib_device *ib_dev; 1307 1308 switch (cmd->qp_type) { 1309 case IB_QPT_RAW_PACKET: 1310 if (!rdma_uattrs_has_raw_cap(attrs)) 1311 return -EPERM; 1312 fallthrough; 1313 case IB_QPT_RC: 1314 case IB_QPT_UC: 1315 case IB_QPT_UD: 1316 case IB_QPT_XRC_INI: 1317 case IB_QPT_XRC_TGT: 1318 case IB_QPT_DRIVER: 1319 break; 1320 default: 1321 return -EINVAL; 1322 } 1323 1324 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1325 &ib_dev); 1326 if (IS_ERR(obj)) 1327 return PTR_ERR(obj); 1328 obj->uxrcd = NULL; 1329 obj->uevent.uobject.user_handle = cmd->user_handle; 1330 mutex_init(&obj->mcast_lock); 1331 1332 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1333 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1334 UVERBS_OBJECT_RWQ_IND_TBL, 1335 cmd->rwq_ind_tbl_handle, attrs); 1336 if (IS_ERR(ind_tbl)) { 1337 ret = PTR_ERR(ind_tbl); 1338 goto err_put; 1339 } 1340 1341 attr.rwq_ind_tbl = ind_tbl; 1342 } 1343 1344 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1345 ret = -EINVAL; 1346 goto err_put; 1347 } 1348 1349 if (ind_tbl && !cmd->max_send_wr) 1350 has_sq = false; 1351 1352 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1353 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1354 attrs); 1355 1356 if (IS_ERR(xrcd_uobj)) { 1357 ret = -EINVAL; 1358 goto err_put; 1359 } 1360 1361 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1362 if (!xrcd) { 1363 ret = -EINVAL; 1364 goto err_put; 1365 } 1366 device = xrcd->device; 1367 } else { 1368 if (cmd->qp_type == IB_QPT_XRC_INI) { 1369 cmd->max_recv_wr = 0; 1370 cmd->max_recv_sge = 0; 1371 } else { 1372 if (cmd->is_srq) { 1373 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1374 cmd->srq_handle, attrs); 1375 if (IS_ERR(srq) || 1376 srq->srq_type == IB_SRQT_XRC) { 1377 ret = IS_ERR(srq) ? PTR_ERR(srq) : 1378 -EINVAL; 1379 goto err_put; 1380 } 1381 } 1382 1383 if (!ind_tbl) { 1384 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1385 rcq = uobj_get_obj_read( 1386 cq, UVERBS_OBJECT_CQ, 1387 cmd->recv_cq_handle, attrs); 1388 if (IS_ERR(rcq)) { 1389 ret = PTR_ERR(rcq); 1390 goto err_put; 1391 } 1392 } 1393 } 1394 } 1395 1396 if (has_sq) { 1397 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1398 cmd->send_cq_handle, attrs); 1399 if (IS_ERR(scq)) { 1400 ret = PTR_ERR(scq); 1401 goto err_put; 1402 } 1403 } 1404 1405 if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI) 1406 rcq = rcq ?: scq; 1407 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1408 attrs); 1409 if (IS_ERR(pd)) { 1410 ret = PTR_ERR(pd); 1411 goto err_put; 1412 } 1413 1414 device = pd->device; 1415 } 1416 1417 attr.event_handler = ib_uverbs_qp_event_handler; 1418 attr.send_cq = scq; 1419 attr.recv_cq = rcq; 1420 attr.srq = srq; 1421 attr.xrcd = xrcd; 1422 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1423 IB_SIGNAL_REQ_WR; 1424 attr.qp_type = cmd->qp_type; 1425 1426 attr.cap.max_send_wr = cmd->max_send_wr; 1427 attr.cap.max_recv_wr = cmd->max_recv_wr; 1428 attr.cap.max_send_sge = cmd->max_send_sge; 1429 attr.cap.max_recv_sge = cmd->max_recv_sge; 1430 attr.cap.max_inline_data = cmd->max_inline_data; 1431 1432 INIT_LIST_HEAD(&obj->uevent.event_list); 1433 INIT_LIST_HEAD(&obj->mcast_list); 1434 1435 attr.create_flags = cmd->create_flags; 1436 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1437 IB_QP_CREATE_CROSS_CHANNEL | 1438 IB_QP_CREATE_MANAGED_SEND | 1439 IB_QP_CREATE_MANAGED_RECV | 1440 IB_QP_CREATE_SCATTER_FCS | 1441 IB_QP_CREATE_CVLAN_STRIPPING | 1442 IB_QP_CREATE_SOURCE_QPN | 1443 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1444 ret = -EINVAL; 1445 goto err_put; 1446 } 1447 1448 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1449 if (!rdma_uattrs_has_raw_cap(attrs)) { 1450 ret = -EPERM; 1451 goto err_put; 1452 } 1453 1454 attr.source_qpn = cmd->source_qpn; 1455 } 1456 1457 qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj, 1458 KBUILD_MODNAME); 1459 if (IS_ERR(qp)) { 1460 ret = PTR_ERR(qp); 1461 goto err_put; 1462 } 1463 ib_qp_usecnt_inc(qp); 1464 1465 obj->uevent.uobject.object = qp; 1466 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1467 if (obj->uevent.event_file) 1468 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1469 1470 if (xrcd) { 1471 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1472 uobject); 1473 atomic_inc(&obj->uxrcd->refcnt); 1474 uobj_put_read(xrcd_uobj); 1475 } 1476 1477 if (pd) 1478 uobj_put_obj_read(pd); 1479 if (scq) 1480 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1481 UVERBS_LOOKUP_READ); 1482 if (rcq && rcq != scq) 1483 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1484 UVERBS_LOOKUP_READ); 1485 if (srq) 1486 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1487 UVERBS_LOOKUP_READ); 1488 if (ind_tbl) 1489 uobj_put_obj_read(ind_tbl); 1490 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1491 1492 resp.base.qpn = qp->qp_num; 1493 resp.base.qp_handle = obj->uevent.uobject.id; 1494 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1495 resp.base.max_send_sge = attr.cap.max_send_sge; 1496 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1497 resp.base.max_send_wr = attr.cap.max_send_wr; 1498 resp.base.max_inline_data = attr.cap.max_inline_data; 1499 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1500 return uverbs_response(attrs, &resp, sizeof(resp)); 1501 1502 err_put: 1503 if (!IS_ERR(xrcd_uobj)) 1504 uobj_put_read(xrcd_uobj); 1505 if (!IS_ERR_OR_NULL(pd)) 1506 uobj_put_obj_read(pd); 1507 if (!IS_ERR_OR_NULL(scq)) 1508 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1509 UVERBS_LOOKUP_READ); 1510 if (!IS_ERR_OR_NULL(rcq) && rcq != scq) 1511 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1512 UVERBS_LOOKUP_READ); 1513 if (!IS_ERR_OR_NULL(srq)) 1514 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1515 UVERBS_LOOKUP_READ); 1516 if (!IS_ERR_OR_NULL(ind_tbl)) 1517 uobj_put_obj_read(ind_tbl); 1518 1519 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1520 return ret; 1521 } 1522 1523 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1524 { 1525 struct ib_uverbs_create_qp cmd; 1526 struct ib_uverbs_ex_create_qp cmd_ex; 1527 int ret; 1528 1529 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1530 if (ret) 1531 return ret; 1532 1533 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1534 cmd_ex.user_handle = cmd.user_handle; 1535 cmd_ex.pd_handle = cmd.pd_handle; 1536 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1537 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1538 cmd_ex.srq_handle = cmd.srq_handle; 1539 cmd_ex.max_send_wr = cmd.max_send_wr; 1540 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1541 cmd_ex.max_send_sge = cmd.max_send_sge; 1542 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1543 cmd_ex.max_inline_data = cmd.max_inline_data; 1544 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1545 cmd_ex.qp_type = cmd.qp_type; 1546 cmd_ex.is_srq = cmd.is_srq; 1547 1548 return create_qp(attrs, &cmd_ex); 1549 } 1550 1551 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1552 { 1553 struct ib_uverbs_ex_create_qp cmd; 1554 int ret; 1555 1556 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1557 if (ret) 1558 return ret; 1559 1560 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1561 return -EINVAL; 1562 1563 if (cmd.reserved) 1564 return -EINVAL; 1565 1566 return create_qp(attrs, &cmd); 1567 } 1568 1569 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1570 { 1571 struct ib_uverbs_create_qp_resp resp = {}; 1572 struct ib_uverbs_open_qp cmd; 1573 struct ib_uqp_object *obj; 1574 struct ib_xrcd *xrcd; 1575 struct ib_qp *qp; 1576 struct ib_qp_open_attr attr = {}; 1577 int ret; 1578 struct ib_uobject *xrcd_uobj; 1579 struct ib_device *ib_dev; 1580 1581 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1582 if (ret) 1583 return ret; 1584 1585 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1586 &ib_dev); 1587 if (IS_ERR(obj)) 1588 return PTR_ERR(obj); 1589 1590 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1591 if (IS_ERR(xrcd_uobj)) { 1592 ret = -EINVAL; 1593 goto err_put; 1594 } 1595 1596 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1597 if (!xrcd) { 1598 ret = -EINVAL; 1599 goto err_xrcd; 1600 } 1601 1602 attr.event_handler = ib_uverbs_qp_event_handler; 1603 attr.qp_num = cmd.qpn; 1604 attr.qp_type = cmd.qp_type; 1605 1606 INIT_LIST_HEAD(&obj->uevent.event_list); 1607 INIT_LIST_HEAD(&obj->mcast_list); 1608 1609 qp = ib_open_qp(xrcd, &attr); 1610 if (IS_ERR(qp)) { 1611 ret = PTR_ERR(qp); 1612 goto err_xrcd; 1613 } 1614 1615 obj->uevent.uobject.object = qp; 1616 obj->uevent.uobject.user_handle = cmd.user_handle; 1617 1618 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1619 atomic_inc(&obj->uxrcd->refcnt); 1620 qp->uobject = obj; 1621 uobj_put_read(xrcd_uobj); 1622 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1623 1624 resp.qpn = qp->qp_num; 1625 resp.qp_handle = obj->uevent.uobject.id; 1626 return uverbs_response(attrs, &resp, sizeof(resp)); 1627 1628 err_xrcd: 1629 uobj_put_read(xrcd_uobj); 1630 err_put: 1631 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1632 return ret; 1633 } 1634 1635 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, 1636 struct rdma_ah_attr *rdma_attr) 1637 { 1638 const struct ib_global_route *grh; 1639 1640 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr); 1641 uverb_attr->sl = rdma_ah_get_sl(rdma_attr); 1642 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr); 1643 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr); 1644 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) & 1645 IB_AH_GRH); 1646 if (uverb_attr->is_global) { 1647 grh = rdma_ah_read_grh(rdma_attr); 1648 memcpy(uverb_attr->dgid, grh->dgid.raw, 16); 1649 uverb_attr->flow_label = grh->flow_label; 1650 uverb_attr->sgid_index = grh->sgid_index; 1651 uverb_attr->hop_limit = grh->hop_limit; 1652 uverb_attr->traffic_class = grh->traffic_class; 1653 } 1654 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr); 1655 } 1656 1657 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) 1658 { 1659 struct ib_uverbs_query_qp cmd; 1660 struct ib_uverbs_query_qp_resp resp; 1661 struct ib_qp *qp; 1662 struct ib_qp_attr *attr; 1663 struct ib_qp_init_attr *init_attr; 1664 int ret; 1665 1666 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1667 if (ret) 1668 return ret; 1669 1670 attr = kmalloc_obj(*attr); 1671 init_attr = kmalloc_obj(*init_attr); 1672 if (!attr || !init_attr) { 1673 ret = -ENOMEM; 1674 goto out; 1675 } 1676 1677 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1678 if (IS_ERR(qp)) { 1679 ret = PTR_ERR(qp); 1680 goto out; 1681 } 1682 1683 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1684 1685 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1686 UVERBS_LOOKUP_READ); 1687 1688 if (ret) 1689 goto out; 1690 1691 memset(&resp, 0, sizeof resp); 1692 1693 resp.qp_state = attr->qp_state; 1694 resp.cur_qp_state = attr->cur_qp_state; 1695 resp.path_mtu = attr->path_mtu; 1696 resp.path_mig_state = attr->path_mig_state; 1697 resp.qkey = attr->qkey; 1698 resp.rq_psn = attr->rq_psn; 1699 resp.sq_psn = attr->sq_psn; 1700 resp.dest_qp_num = attr->dest_qp_num; 1701 resp.qp_access_flags = attr->qp_access_flags; 1702 resp.pkey_index = attr->pkey_index; 1703 resp.alt_pkey_index = attr->alt_pkey_index; 1704 resp.sq_draining = attr->sq_draining; 1705 resp.max_rd_atomic = attr->max_rd_atomic; 1706 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1707 resp.min_rnr_timer = attr->min_rnr_timer; 1708 resp.port_num = attr->port_num; 1709 resp.timeout = attr->timeout; 1710 resp.retry_cnt = attr->retry_cnt; 1711 resp.rnr_retry = attr->rnr_retry; 1712 resp.alt_port_num = attr->alt_port_num; 1713 resp.alt_timeout = attr->alt_timeout; 1714 1715 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1716 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1717 1718 resp.max_send_wr = init_attr->cap.max_send_wr; 1719 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1720 resp.max_send_sge = init_attr->cap.max_send_sge; 1721 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1722 resp.max_inline_data = init_attr->cap.max_inline_data; 1723 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1724 1725 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1726 1727 out: 1728 kfree(attr); 1729 kfree(init_attr); 1730 1731 return ret; 1732 } 1733 1734 /* Remove ignored fields set in the attribute mask */ 1735 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1736 { 1737 switch (qp_type) { 1738 case IB_QPT_XRC_INI: 1739 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1740 case IB_QPT_XRC_TGT: 1741 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1742 IB_QP_RNR_RETRY); 1743 default: 1744 return mask; 1745 } 1746 } 1747 1748 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1749 struct rdma_ah_attr *rdma_attr, 1750 struct ib_uverbs_qp_dest *uverb_attr) 1751 { 1752 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); 1753 if (uverb_attr->is_global) { 1754 rdma_ah_set_grh(rdma_attr, NULL, 1755 uverb_attr->flow_label, 1756 uverb_attr->sgid_index, 1757 uverb_attr->hop_limit, 1758 uverb_attr->traffic_class); 1759 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); 1760 } else { 1761 rdma_ah_set_ah_flags(rdma_attr, 0); 1762 } 1763 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); 1764 rdma_ah_set_sl(rdma_attr, uverb_attr->sl); 1765 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); 1766 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); 1767 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); 1768 rdma_ah_set_make_grd(rdma_attr, false); 1769 } 1770 1771 static int modify_qp(struct uverbs_attr_bundle *attrs, 1772 struct ib_uverbs_ex_modify_qp *cmd) 1773 { 1774 struct ib_qp_attr *attr; 1775 struct ib_qp *qp; 1776 int ret; 1777 1778 attr = kzalloc_obj(*attr); 1779 if (!attr) 1780 return -ENOMEM; 1781 1782 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1783 attrs); 1784 if (IS_ERR(qp)) { 1785 ret = PTR_ERR(qp); 1786 goto out; 1787 } 1788 1789 if ((cmd->base.attr_mask & IB_QP_PORT) && 1790 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1791 ret = -EINVAL; 1792 goto release_qp; 1793 } 1794 1795 if ((cmd->base.attr_mask & IB_QP_AV)) { 1796 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1797 ret = -EINVAL; 1798 goto release_qp; 1799 } 1800 1801 if (cmd->base.attr_mask & IB_QP_STATE && 1802 cmd->base.qp_state == IB_QPS_RTR) { 1803 /* We are in INIT->RTR TRANSITION (if we are not, 1804 * this transition will be rejected in subsequent checks). 1805 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1806 * but the IB_QP_STATE flag is required. 1807 * 1808 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1809 * when IB_QP_AV is set, has required inclusion of a valid 1810 * port number in the primary AV. (AVs are created and handled 1811 * differently for infiniband and ethernet (RoCE) ports). 1812 * 1813 * Check the port number included in the primary AV against 1814 * the port number in the qp struct, which was set (and saved) 1815 * in the RST->INIT transition. 1816 */ 1817 if (cmd->base.dest.port_num != qp->real_qp->port) { 1818 ret = -EINVAL; 1819 goto release_qp; 1820 } 1821 } else { 1822 /* We are in SQD->SQD. (If we are not, this transition will 1823 * be rejected later in the verbs layer checks). 1824 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1825 * together in the SQD->SQD transition. 1826 * 1827 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1828 * verbs layer driver does not track primary port changes 1829 * resulting from path migration. Thus, in SQD, if the primary 1830 * AV is modified, the primary port should also be modified). 1831 * 1832 * Note that in this transition, the IB_QP_STATE flag 1833 * is not allowed. 1834 */ 1835 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1836 == (IB_QP_AV | IB_QP_PORT)) && 1837 cmd->base.port_num != cmd->base.dest.port_num) { 1838 ret = -EINVAL; 1839 goto release_qp; 1840 } 1841 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1842 == IB_QP_AV) { 1843 cmd->base.attr_mask |= IB_QP_PORT; 1844 cmd->base.port_num = cmd->base.dest.port_num; 1845 } 1846 } 1847 } 1848 1849 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1850 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1851 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1852 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1853 ret = -EINVAL; 1854 goto release_qp; 1855 } 1856 1857 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1858 cmd->base.cur_qp_state > IB_QPS_ERR) || 1859 (cmd->base.attr_mask & IB_QP_STATE && 1860 cmd->base.qp_state > IB_QPS_ERR)) { 1861 ret = -EINVAL; 1862 goto release_qp; 1863 } 1864 1865 if (cmd->base.attr_mask & IB_QP_STATE) 1866 attr->qp_state = cmd->base.qp_state; 1867 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1868 attr->cur_qp_state = cmd->base.cur_qp_state; 1869 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1870 attr->path_mtu = cmd->base.path_mtu; 1871 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1872 attr->path_mig_state = cmd->base.path_mig_state; 1873 if (cmd->base.attr_mask & IB_QP_QKEY) { 1874 if (cmd->base.qkey & IB_QP_SET_QKEY && 1875 !(rdma_nl_get_privileged_qkey() || 1876 rdma_uattrs_has_raw_cap(attrs))) { 1877 ret = -EPERM; 1878 goto release_qp; 1879 } 1880 attr->qkey = cmd->base.qkey; 1881 } 1882 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1883 attr->rq_psn = cmd->base.rq_psn; 1884 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1885 attr->sq_psn = cmd->base.sq_psn; 1886 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1887 attr->dest_qp_num = cmd->base.dest_qp_num; 1888 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1889 attr->qp_access_flags = cmd->base.qp_access_flags; 1890 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1891 attr->pkey_index = cmd->base.pkey_index; 1892 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1893 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1894 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1895 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1896 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1897 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1898 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1899 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1900 if (cmd->base.attr_mask & IB_QP_PORT) 1901 attr->port_num = cmd->base.port_num; 1902 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1903 attr->timeout = cmd->base.timeout; 1904 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1905 attr->retry_cnt = cmd->base.retry_cnt; 1906 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1907 attr->rnr_retry = cmd->base.rnr_retry; 1908 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1909 attr->alt_port_num = cmd->base.alt_port_num; 1910 attr->alt_timeout = cmd->base.alt_timeout; 1911 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1912 } 1913 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1914 attr->rate_limit = cmd->rate_limit; 1915 1916 if (cmd->base.attr_mask & IB_QP_AV) 1917 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1918 &cmd->base.dest); 1919 1920 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1921 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1922 &cmd->base.alt_dest); 1923 1924 ret = ib_modify_qp_with_udata(qp, attr, 1925 modify_qp_mask(qp->qp_type, 1926 cmd->base.attr_mask), 1927 &attrs->driver_udata); 1928 1929 release_qp: 1930 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1931 UVERBS_LOOKUP_READ); 1932 out: 1933 kfree(attr); 1934 1935 return ret; 1936 } 1937 1938 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1939 { 1940 struct ib_uverbs_ex_modify_qp cmd; 1941 int ret; 1942 1943 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1944 if (ret) 1945 return ret; 1946 1947 if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 1948 return -EOPNOTSUPP; 1949 1950 return modify_qp(attrs, &cmd); 1951 } 1952 1953 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1954 { 1955 struct ib_uverbs_ex_modify_qp cmd; 1956 struct ib_uverbs_ex_modify_qp_resp resp = { 1957 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1958 }; 1959 int ret; 1960 1961 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1962 if (ret) 1963 return ret; 1964 1965 /* 1966 * Last bit is reserved for extending the attr_mask by 1967 * using another field. 1968 */ 1969 if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT)) 1970 return -EOPNOTSUPP; 1971 1972 ret = modify_qp(attrs, &cmd); 1973 if (ret) 1974 return ret; 1975 1976 return uverbs_response(attrs, &resp, sizeof(resp)); 1977 } 1978 1979 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1980 { 1981 struct ib_uverbs_destroy_qp cmd; 1982 struct ib_uverbs_destroy_qp_resp resp; 1983 struct ib_uobject *uobj; 1984 struct ib_uqp_object *obj; 1985 int ret; 1986 1987 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1988 if (ret) 1989 return ret; 1990 1991 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1992 if (IS_ERR(uobj)) 1993 return PTR_ERR(uobj); 1994 1995 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1996 memset(&resp, 0, sizeof(resp)); 1997 resp.events_reported = obj->uevent.events_reported; 1998 1999 uobj_put_destroy(uobj); 2000 2001 return uverbs_response(attrs, &resp, sizeof(resp)); 2002 } 2003 2004 static void *alloc_wr(size_t wr_size, __u32 num_sge) 2005 { 2006 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) / 2007 sizeof(struct ib_sge)) 2008 return NULL; 2009 2010 return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) + 2011 num_sge * sizeof(struct ib_sge), 2012 GFP_KERNEL); 2013 } 2014 2015 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 2016 { 2017 struct ib_uverbs_post_send cmd; 2018 struct ib_uverbs_post_send_resp resp; 2019 struct ib_uverbs_send_wr *user_wr; 2020 struct ib_send_wr *wr = NULL, *last, *next; 2021 const struct ib_send_wr *bad_wr; 2022 struct ib_qp *qp; 2023 int i, sg_ind; 2024 int is_ud; 2025 int ret, ret2; 2026 size_t next_size; 2027 const struct ib_sge __user *sgls; 2028 const void __user *wqes; 2029 struct uverbs_req_iter iter; 2030 2031 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2032 if (ret) 2033 return ret; 2034 wqes = uverbs_request_next_ptr(&iter, size_mul(cmd.wqe_size, 2035 cmd.wr_count)); 2036 if (IS_ERR(wqes)) 2037 return PTR_ERR(wqes); 2038 sgls = uverbs_request_next_ptr(&iter, 2039 size_mul(cmd.sge_count, 2040 sizeof(struct ib_uverbs_sge))); 2041 if (IS_ERR(sgls)) 2042 return PTR_ERR(sgls); 2043 ret = uverbs_request_finish(&iter); 2044 if (ret) 2045 return ret; 2046 2047 if (cmd.wqe_size < sizeof(struct ib_uverbs_send_wr)) 2048 return -EINVAL; 2049 2050 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL | __GFP_NOWARN); 2051 if (!user_wr) 2052 return -ENOMEM; 2053 2054 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2055 if (IS_ERR(qp)) { 2056 ret = PTR_ERR(qp); 2057 goto out; 2058 } 2059 2060 is_ud = qp->qp_type == IB_QPT_UD; 2061 sg_ind = 0; 2062 last = NULL; 2063 for (i = 0; i < cmd.wr_count; ++i) { 2064 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2065 cmd.wqe_size)) { 2066 ret = -EFAULT; 2067 goto out_put; 2068 } 2069 2070 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2071 ret = -EINVAL; 2072 goto out_put; 2073 } 2074 2075 if (is_ud) { 2076 struct ib_ud_wr *ud; 2077 2078 if (user_wr->opcode != IB_WR_SEND && 2079 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2080 ret = -EINVAL; 2081 goto out_put; 2082 } 2083 2084 next_size = sizeof(*ud); 2085 ud = alloc_wr(next_size, user_wr->num_sge); 2086 if (!ud) { 2087 ret = -ENOMEM; 2088 goto out_put; 2089 } 2090 2091 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2092 user_wr->wr.ud.ah, attrs); 2093 if (IS_ERR(ud->ah)) { 2094 ret = PTR_ERR(ud->ah); 2095 kfree(ud); 2096 goto out_put; 2097 } 2098 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2099 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2100 2101 next = &ud->wr; 2102 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2103 user_wr->opcode == IB_WR_RDMA_WRITE || 2104 user_wr->opcode == IB_WR_RDMA_READ) { 2105 struct ib_rdma_wr *rdma; 2106 2107 next_size = sizeof(*rdma); 2108 rdma = alloc_wr(next_size, user_wr->num_sge); 2109 if (!rdma) { 2110 ret = -ENOMEM; 2111 goto out_put; 2112 } 2113 2114 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2115 rdma->rkey = user_wr->wr.rdma.rkey; 2116 2117 next = &rdma->wr; 2118 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2119 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2120 struct ib_atomic_wr *atomic; 2121 2122 next_size = sizeof(*atomic); 2123 atomic = alloc_wr(next_size, user_wr->num_sge); 2124 if (!atomic) { 2125 ret = -ENOMEM; 2126 goto out_put; 2127 } 2128 2129 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2130 atomic->compare_add = user_wr->wr.atomic.compare_add; 2131 atomic->swap = user_wr->wr.atomic.swap; 2132 atomic->rkey = user_wr->wr.atomic.rkey; 2133 2134 next = &atomic->wr; 2135 } else if (user_wr->opcode == IB_WR_SEND || 2136 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2137 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2138 next_size = sizeof(*next); 2139 next = alloc_wr(next_size, user_wr->num_sge); 2140 if (!next) { 2141 ret = -ENOMEM; 2142 goto out_put; 2143 } 2144 } else { 2145 ret = -EINVAL; 2146 goto out_put; 2147 } 2148 2149 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2150 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2151 next->ex.imm_data = 2152 (__be32 __force) user_wr->ex.imm_data; 2153 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2154 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2155 } 2156 2157 if (!last) 2158 wr = next; 2159 else 2160 last->next = next; 2161 last = next; 2162 2163 next->next = NULL; 2164 next->wr_id = user_wr->wr_id; 2165 next->num_sge = user_wr->num_sge; 2166 next->opcode = user_wr->opcode; 2167 next->send_flags = user_wr->send_flags; 2168 2169 if (next->num_sge) { 2170 next->sg_list = (void *) next + 2171 ALIGN(next_size, sizeof(struct ib_sge)); 2172 if (copy_from_user(next->sg_list, sgls + sg_ind, 2173 next->num_sge * 2174 sizeof(struct ib_sge))) { 2175 ret = -EFAULT; 2176 goto out_put; 2177 } 2178 sg_ind += next->num_sge; 2179 } else 2180 next->sg_list = NULL; 2181 } 2182 2183 resp.bad_wr = 0; 2184 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2185 if (ret) 2186 for (next = wr; next; next = next->next) { 2187 ++resp.bad_wr; 2188 if (next == bad_wr) 2189 break; 2190 } 2191 2192 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2193 if (ret2) 2194 ret = ret2; 2195 2196 out_put: 2197 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2198 UVERBS_LOOKUP_READ); 2199 2200 while (wr) { 2201 if (is_ud && ud_wr(wr)->ah) 2202 uobj_put_obj_read(ud_wr(wr)->ah); 2203 next = wr->next; 2204 kfree(wr); 2205 wr = next; 2206 } 2207 2208 out: 2209 kfree(user_wr); 2210 2211 return ret; 2212 } 2213 2214 static struct ib_recv_wr * 2215 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2216 u32 wqe_size, u32 sge_count) 2217 { 2218 struct ib_uverbs_recv_wr *user_wr; 2219 struct ib_recv_wr *wr = NULL, *last, *next; 2220 int sg_ind; 2221 int i; 2222 int ret; 2223 const struct ib_sge __user *sgls; 2224 const void __user *wqes; 2225 2226 if (wqe_size < sizeof(struct ib_uverbs_recv_wr)) 2227 return ERR_PTR(-EINVAL); 2228 2229 wqes = uverbs_request_next_ptr(iter, size_mul(wqe_size, wr_count)); 2230 if (IS_ERR(wqes)) 2231 return ERR_CAST(wqes); 2232 sgls = uverbs_request_next_ptr(iter, size_mul(sge_count, 2233 sizeof(struct ib_uverbs_sge))); 2234 if (IS_ERR(sgls)) 2235 return ERR_CAST(sgls); 2236 ret = uverbs_request_finish(iter); 2237 if (ret) 2238 return ERR_PTR(ret); 2239 2240 user_wr = kmalloc(wqe_size, GFP_KERNEL | __GFP_NOWARN); 2241 if (!user_wr) 2242 return ERR_PTR(-ENOMEM); 2243 2244 sg_ind = 0; 2245 last = NULL; 2246 for (i = 0; i < wr_count; ++i) { 2247 if (copy_from_user(user_wr, wqes + i * wqe_size, 2248 wqe_size)) { 2249 ret = -EFAULT; 2250 goto err; 2251 } 2252 2253 if (user_wr->num_sge + sg_ind > sge_count) { 2254 ret = -EINVAL; 2255 goto err; 2256 } 2257 2258 if (user_wr->num_sge >= 2259 (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) / 2260 sizeof(struct ib_sge)) { 2261 ret = -EINVAL; 2262 goto err; 2263 } 2264 2265 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) + 2266 user_wr->num_sge * sizeof(struct ib_sge), 2267 GFP_KERNEL); 2268 if (!next) { 2269 ret = -ENOMEM; 2270 goto err; 2271 } 2272 2273 if (!last) 2274 wr = next; 2275 else 2276 last->next = next; 2277 last = next; 2278 2279 next->next = NULL; 2280 next->wr_id = user_wr->wr_id; 2281 next->num_sge = user_wr->num_sge; 2282 2283 if (next->num_sge) { 2284 next->sg_list = (void *)next + 2285 ALIGN(sizeof(*next), sizeof(struct ib_sge)); 2286 if (copy_from_user(next->sg_list, sgls + sg_ind, 2287 next->num_sge * 2288 sizeof(struct ib_sge))) { 2289 ret = -EFAULT; 2290 goto err; 2291 } 2292 sg_ind += next->num_sge; 2293 } else 2294 next->sg_list = NULL; 2295 } 2296 2297 kfree(user_wr); 2298 return wr; 2299 2300 err: 2301 kfree(user_wr); 2302 2303 while (wr) { 2304 next = wr->next; 2305 kfree(wr); 2306 wr = next; 2307 } 2308 2309 return ERR_PTR(ret); 2310 } 2311 2312 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2313 { 2314 struct ib_uverbs_post_recv cmd; 2315 struct ib_uverbs_post_recv_resp resp; 2316 struct ib_recv_wr *wr, *next; 2317 const struct ib_recv_wr *bad_wr; 2318 struct ib_qp *qp; 2319 int ret, ret2; 2320 struct uverbs_req_iter iter; 2321 2322 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2323 if (ret) 2324 return ret; 2325 2326 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2327 cmd.sge_count); 2328 if (IS_ERR(wr)) 2329 return PTR_ERR(wr); 2330 2331 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2332 if (IS_ERR(qp)) { 2333 ret = PTR_ERR(qp); 2334 goto out; 2335 } 2336 2337 resp.bad_wr = 0; 2338 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2339 2340 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2341 UVERBS_LOOKUP_READ); 2342 if (ret) { 2343 for (next = wr; next; next = next->next) { 2344 ++resp.bad_wr; 2345 if (next == bad_wr) 2346 break; 2347 } 2348 } 2349 2350 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2351 if (ret2) 2352 ret = ret2; 2353 out: 2354 while (wr) { 2355 next = wr->next; 2356 kfree(wr); 2357 wr = next; 2358 } 2359 2360 return ret; 2361 } 2362 2363 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2364 { 2365 struct ib_uverbs_post_srq_recv cmd; 2366 struct ib_uverbs_post_srq_recv_resp resp; 2367 struct ib_recv_wr *wr, *next; 2368 const struct ib_recv_wr *bad_wr; 2369 struct ib_srq *srq; 2370 int ret, ret2; 2371 struct uverbs_req_iter iter; 2372 2373 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2374 if (ret) 2375 return ret; 2376 2377 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2378 cmd.sge_count); 2379 if (IS_ERR(wr)) 2380 return PTR_ERR(wr); 2381 2382 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2383 if (IS_ERR(srq)) { 2384 ret = PTR_ERR(srq); 2385 goto out; 2386 } 2387 2388 resp.bad_wr = 0; 2389 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2390 2391 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 2392 UVERBS_LOOKUP_READ); 2393 2394 if (ret) 2395 for (next = wr; next; next = next->next) { 2396 ++resp.bad_wr; 2397 if (next == bad_wr) 2398 break; 2399 } 2400 2401 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2402 if (ret2) 2403 ret = ret2; 2404 2405 out: 2406 while (wr) { 2407 next = wr->next; 2408 kfree(wr); 2409 wr = next; 2410 } 2411 2412 return ret; 2413 } 2414 2415 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2416 { 2417 struct ib_uverbs_create_ah cmd; 2418 struct ib_uverbs_create_ah_resp resp; 2419 struct ib_uobject *uobj; 2420 struct ib_pd *pd; 2421 struct ib_ah *ah; 2422 struct rdma_ah_attr attr = {}; 2423 int ret; 2424 struct ib_device *ib_dev; 2425 2426 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2427 if (ret) 2428 return ret; 2429 2430 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2431 if (IS_ERR(uobj)) 2432 return PTR_ERR(uobj); 2433 2434 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2435 ret = -EINVAL; 2436 goto err; 2437 } 2438 2439 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2440 if (IS_ERR(pd)) { 2441 ret = PTR_ERR(pd); 2442 goto err; 2443 } 2444 2445 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2446 rdma_ah_set_make_grd(&attr, false); 2447 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2448 rdma_ah_set_sl(&attr, cmd.attr.sl); 2449 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2450 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2451 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2452 2453 if (cmd.attr.is_global) { 2454 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2455 cmd.attr.grh.sgid_index, 2456 cmd.attr.grh.hop_limit, 2457 cmd.attr.grh.traffic_class); 2458 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2459 } else { 2460 rdma_ah_set_ah_flags(&attr, 0); 2461 } 2462 2463 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2464 if (IS_ERR(ah)) { 2465 ret = PTR_ERR(ah); 2466 goto err_put; 2467 } 2468 2469 ah->uobject = uobj; 2470 uobj->user_handle = cmd.user_handle; 2471 uobj->object = ah; 2472 uobj_put_obj_read(pd); 2473 uobj_finalize_uobj_create(uobj, attrs); 2474 2475 resp.ah_handle = uobj->id; 2476 return uverbs_response(attrs, &resp, sizeof(resp)); 2477 2478 err_put: 2479 uobj_put_obj_read(pd); 2480 err: 2481 uobj_alloc_abort(uobj, attrs); 2482 return ret; 2483 } 2484 2485 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2486 { 2487 struct ib_uverbs_destroy_ah cmd; 2488 int ret; 2489 2490 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2491 if (ret) 2492 return ret; 2493 2494 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2495 } 2496 2497 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2498 { 2499 struct ib_uverbs_attach_mcast cmd; 2500 struct ib_qp *qp; 2501 struct ib_uqp_object *obj; 2502 struct ib_uverbs_mcast_entry *mcast; 2503 int ret; 2504 2505 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2506 if (ret) 2507 return ret; 2508 2509 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2510 if (IS_ERR(qp)) 2511 return PTR_ERR(qp); 2512 2513 obj = qp->uobject; 2514 2515 mutex_lock(&obj->mcast_lock); 2516 list_for_each_entry(mcast, &obj->mcast_list, list) 2517 if (cmd.mlid == mcast->lid && 2518 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2519 ret = 0; 2520 goto out_put; 2521 } 2522 2523 mcast = kmalloc_obj(*mcast); 2524 if (!mcast) { 2525 ret = -ENOMEM; 2526 goto out_put; 2527 } 2528 2529 mcast->lid = cmd.mlid; 2530 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2531 2532 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2533 if (!ret) 2534 list_add_tail(&mcast->list, &obj->mcast_list); 2535 else 2536 kfree(mcast); 2537 2538 out_put: 2539 mutex_unlock(&obj->mcast_lock); 2540 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2541 UVERBS_LOOKUP_READ); 2542 2543 return ret; 2544 } 2545 2546 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2547 { 2548 struct ib_uverbs_detach_mcast cmd; 2549 struct ib_uqp_object *obj; 2550 struct ib_qp *qp; 2551 struct ib_uverbs_mcast_entry *mcast; 2552 int ret; 2553 bool found = false; 2554 2555 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2556 if (ret) 2557 return ret; 2558 2559 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2560 if (IS_ERR(qp)) 2561 return PTR_ERR(qp); 2562 2563 obj = qp->uobject; 2564 mutex_lock(&obj->mcast_lock); 2565 2566 list_for_each_entry(mcast, &obj->mcast_list, list) 2567 if (cmd.mlid == mcast->lid && 2568 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2569 list_del(&mcast->list); 2570 kfree(mcast); 2571 found = true; 2572 break; 2573 } 2574 2575 if (!found) { 2576 ret = -EINVAL; 2577 goto out_put; 2578 } 2579 2580 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2581 2582 out_put: 2583 mutex_unlock(&obj->mcast_lock); 2584 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2585 UVERBS_LOOKUP_READ); 2586 return ret; 2587 } 2588 2589 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2590 { 2591 struct ib_uflow_resources *resources; 2592 2593 resources = kzalloc_obj(*resources); 2594 2595 if (!resources) 2596 return NULL; 2597 2598 if (!num_specs) 2599 goto out; 2600 2601 resources->counters = 2602 kzalloc_objs(*resources->counters, num_specs); 2603 resources->collection = 2604 kzalloc_objs(*resources->collection, num_specs); 2605 2606 if (!resources->counters || !resources->collection) 2607 goto err; 2608 2609 out: 2610 resources->max = num_specs; 2611 return resources; 2612 2613 err: 2614 kfree(resources->counters); 2615 kfree(resources); 2616 2617 return NULL; 2618 } 2619 EXPORT_SYMBOL(flow_resources_alloc); 2620 2621 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2622 { 2623 unsigned int i; 2624 2625 if (!uflow_res) 2626 return; 2627 2628 for (i = 0; i < uflow_res->collection_num; i++) 2629 atomic_dec(&uflow_res->collection[i]->usecnt); 2630 2631 for (i = 0; i < uflow_res->counters_num; i++) 2632 atomic_dec(&uflow_res->counters[i]->usecnt); 2633 2634 kfree(uflow_res->collection); 2635 kfree(uflow_res->counters); 2636 kfree(uflow_res); 2637 } 2638 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2639 2640 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2641 enum ib_flow_spec_type type, 2642 void *ibobj) 2643 { 2644 WARN_ON(uflow_res->num >= uflow_res->max); 2645 2646 switch (type) { 2647 case IB_FLOW_SPEC_ACTION_HANDLE: 2648 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2649 uflow_res->collection[uflow_res->collection_num++] = 2650 (struct ib_flow_action *)ibobj; 2651 break; 2652 case IB_FLOW_SPEC_ACTION_COUNT: 2653 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2654 uflow_res->counters[uflow_res->counters_num++] = 2655 (struct ib_counters *)ibobj; 2656 break; 2657 default: 2658 WARN_ON(1); 2659 } 2660 2661 uflow_res->num++; 2662 } 2663 EXPORT_SYMBOL(flow_resources_add); 2664 2665 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2666 struct ib_uverbs_flow_spec *kern_spec, 2667 union ib_flow_spec *ib_spec, 2668 struct ib_uflow_resources *uflow_res) 2669 { 2670 ib_spec->type = kern_spec->type; 2671 switch (ib_spec->type) { 2672 case IB_FLOW_SPEC_ACTION_TAG: 2673 if (kern_spec->flow_tag.size != 2674 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2675 return -EINVAL; 2676 2677 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2678 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2679 break; 2680 case IB_FLOW_SPEC_ACTION_DROP: 2681 if (kern_spec->drop.size != 2682 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2683 return -EINVAL; 2684 2685 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2686 break; 2687 case IB_FLOW_SPEC_ACTION_HANDLE: 2688 if (kern_spec->action.size != 2689 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2690 return -EOPNOTSUPP; 2691 ib_spec->action.act = uobj_get_obj_read(flow_action, 2692 UVERBS_OBJECT_FLOW_ACTION, 2693 kern_spec->action.handle, 2694 attrs); 2695 if (IS_ERR(ib_spec->action.act)) 2696 return PTR_ERR(ib_spec->action.act); 2697 ib_spec->action.size = 2698 sizeof(struct ib_flow_spec_action_handle); 2699 flow_resources_add(uflow_res, 2700 IB_FLOW_SPEC_ACTION_HANDLE, 2701 ib_spec->action.act); 2702 uobj_put_obj_read(ib_spec->action.act); 2703 break; 2704 case IB_FLOW_SPEC_ACTION_COUNT: 2705 if (kern_spec->flow_count.size != 2706 sizeof(struct ib_uverbs_flow_spec_action_count)) 2707 return -EINVAL; 2708 ib_spec->flow_count.counters = 2709 uobj_get_obj_read(counters, 2710 UVERBS_OBJECT_COUNTERS, 2711 kern_spec->flow_count.handle, 2712 attrs); 2713 if (IS_ERR(ib_spec->flow_count.counters)) 2714 return PTR_ERR(ib_spec->flow_count.counters); 2715 ib_spec->flow_count.size = 2716 sizeof(struct ib_flow_spec_action_count); 2717 flow_resources_add(uflow_res, 2718 IB_FLOW_SPEC_ACTION_COUNT, 2719 ib_spec->flow_count.counters); 2720 uobj_put_obj_read(ib_spec->flow_count.counters); 2721 break; 2722 default: 2723 return -EINVAL; 2724 } 2725 return 0; 2726 } 2727 2728 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2729 u16 ib_real_filter_sz) 2730 { 2731 /* 2732 * User space filter structures must be 64 bit aligned, otherwise this 2733 * may pass, but we won't handle additional new attributes. 2734 */ 2735 2736 if (kern_filter_size > ib_real_filter_sz) { 2737 if (memchr_inv(kern_spec_filter + 2738 ib_real_filter_sz, 0, 2739 kern_filter_size - ib_real_filter_sz)) 2740 return -EINVAL; 2741 return ib_real_filter_sz; 2742 } 2743 return kern_filter_size; 2744 } 2745 2746 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2747 const void *kern_spec_mask, 2748 const void *kern_spec_val, 2749 size_t kern_filter_sz, 2750 union ib_flow_spec *ib_spec) 2751 { 2752 ssize_t actual_filter_sz; 2753 ssize_t ib_filter_sz; 2754 2755 /* User flow spec size must be aligned to 4 bytes */ 2756 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2757 return -EINVAL; 2758 2759 ib_spec->type = type; 2760 2761 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2762 return -EINVAL; 2763 2764 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2765 case IB_FLOW_SPEC_ETH: 2766 ib_filter_sz = sizeof(struct ib_flow_eth_filter); 2767 actual_filter_sz = spec_filter_size(kern_spec_mask, 2768 kern_filter_sz, 2769 ib_filter_sz); 2770 if (actual_filter_sz <= 0) 2771 return -EINVAL; 2772 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2773 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2774 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2775 break; 2776 case IB_FLOW_SPEC_IPV4: 2777 ib_filter_sz = sizeof(struct ib_flow_ipv4_filter); 2778 actual_filter_sz = spec_filter_size(kern_spec_mask, 2779 kern_filter_sz, 2780 ib_filter_sz); 2781 if (actual_filter_sz <= 0) 2782 return -EINVAL; 2783 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2784 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2785 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2786 break; 2787 case IB_FLOW_SPEC_IPV6: 2788 ib_filter_sz = sizeof(struct ib_flow_ipv6_filter); 2789 actual_filter_sz = spec_filter_size(kern_spec_mask, 2790 kern_filter_sz, 2791 ib_filter_sz); 2792 if (actual_filter_sz <= 0) 2793 return -EINVAL; 2794 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2795 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2796 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2797 2798 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2799 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2800 return -EINVAL; 2801 break; 2802 case IB_FLOW_SPEC_TCP: 2803 case IB_FLOW_SPEC_UDP: 2804 ib_filter_sz = sizeof(struct ib_flow_tcp_udp_filter); 2805 actual_filter_sz = spec_filter_size(kern_spec_mask, 2806 kern_filter_sz, 2807 ib_filter_sz); 2808 if (actual_filter_sz <= 0) 2809 return -EINVAL; 2810 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2811 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2812 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2813 break; 2814 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2815 ib_filter_sz = sizeof(struct ib_flow_tunnel_filter); 2816 actual_filter_sz = spec_filter_size(kern_spec_mask, 2817 kern_filter_sz, 2818 ib_filter_sz); 2819 if (actual_filter_sz <= 0) 2820 return -EINVAL; 2821 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2822 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2823 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2824 2825 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2826 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2827 return -EINVAL; 2828 break; 2829 case IB_FLOW_SPEC_ESP: 2830 ib_filter_sz = sizeof(struct ib_flow_esp_filter); 2831 actual_filter_sz = spec_filter_size(kern_spec_mask, 2832 kern_filter_sz, 2833 ib_filter_sz); 2834 if (actual_filter_sz <= 0) 2835 return -EINVAL; 2836 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2837 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2838 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2839 break; 2840 case IB_FLOW_SPEC_GRE: 2841 ib_filter_sz = sizeof(struct ib_flow_gre_filter); 2842 actual_filter_sz = spec_filter_size(kern_spec_mask, 2843 kern_filter_sz, 2844 ib_filter_sz); 2845 if (actual_filter_sz <= 0) 2846 return -EINVAL; 2847 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2848 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2849 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2850 break; 2851 case IB_FLOW_SPEC_MPLS: 2852 ib_filter_sz = sizeof(struct ib_flow_mpls_filter); 2853 actual_filter_sz = spec_filter_size(kern_spec_mask, 2854 kern_filter_sz, 2855 ib_filter_sz); 2856 if (actual_filter_sz <= 0) 2857 return -EINVAL; 2858 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2859 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2860 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2861 break; 2862 default: 2863 return -EINVAL; 2864 } 2865 return 0; 2866 } 2867 2868 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2869 union ib_flow_spec *ib_spec) 2870 { 2871 size_t kern_filter_sz; 2872 void *kern_spec_mask; 2873 void *kern_spec_val; 2874 2875 if (check_sub_overflow((size_t)kern_spec->hdr.size, 2876 sizeof(struct ib_uverbs_flow_spec_hdr), 2877 &kern_filter_sz)) 2878 return -EINVAL; 2879 2880 kern_filter_sz /= 2; 2881 2882 kern_spec_val = (void *)kern_spec + 2883 sizeof(struct ib_uverbs_flow_spec_hdr); 2884 kern_spec_mask = kern_spec_val + kern_filter_sz; 2885 2886 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2887 kern_spec_mask, 2888 kern_spec_val, 2889 kern_filter_sz, ib_spec); 2890 } 2891 2892 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2893 struct ib_uverbs_flow_spec *kern_spec, 2894 union ib_flow_spec *ib_spec, 2895 struct ib_uflow_resources *uflow_res) 2896 { 2897 if (kern_spec->reserved) 2898 return -EINVAL; 2899 2900 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2901 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2902 uflow_res); 2903 else 2904 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2905 } 2906 2907 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2908 { 2909 struct ib_uverbs_ex_create_wq cmd; 2910 struct ib_uverbs_ex_create_wq_resp resp = {}; 2911 struct ib_uwq_object *obj; 2912 int err = 0; 2913 struct ib_cq *cq; 2914 struct ib_pd *pd; 2915 struct ib_wq *wq; 2916 struct ib_wq_init_attr wq_init_attr = {}; 2917 struct ib_device *ib_dev; 2918 2919 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2920 if (err) 2921 return err; 2922 2923 if (cmd.comp_mask) 2924 return -EOPNOTSUPP; 2925 2926 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2927 &ib_dev); 2928 if (IS_ERR(obj)) 2929 return PTR_ERR(obj); 2930 2931 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2932 if (IS_ERR(pd)) { 2933 err = PTR_ERR(pd); 2934 goto err_uobj; 2935 } 2936 2937 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2938 if (IS_ERR(cq)) { 2939 err = PTR_ERR(cq); 2940 goto err_put_pd; 2941 } 2942 2943 wq_init_attr.cq = cq; 2944 wq_init_attr.max_sge = cmd.max_sge; 2945 wq_init_attr.max_wr = cmd.max_wr; 2946 wq_init_attr.wq_type = cmd.wq_type; 2947 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2948 wq_init_attr.create_flags = cmd.create_flags; 2949 INIT_LIST_HEAD(&obj->uevent.event_list); 2950 obj->uevent.uobject.user_handle = cmd.user_handle; 2951 2952 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2953 if (IS_ERR(wq)) { 2954 err = PTR_ERR(wq); 2955 goto err_put_cq; 2956 } 2957 2958 wq->uobject = obj; 2959 obj->uevent.uobject.object = wq; 2960 wq->wq_type = wq_init_attr.wq_type; 2961 wq->cq = cq; 2962 wq->pd = pd; 2963 wq->device = pd->device; 2964 atomic_set(&wq->usecnt, 0); 2965 atomic_inc(&pd->usecnt); 2966 atomic_inc(&cq->usecnt); 2967 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 2968 if (obj->uevent.event_file) 2969 uverbs_uobject_get(&obj->uevent.event_file->uobj); 2970 2971 uobj_put_obj_read(pd); 2972 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2973 UVERBS_LOOKUP_READ); 2974 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 2975 2976 resp.wq_handle = obj->uevent.uobject.id; 2977 resp.max_sge = wq_init_attr.max_sge; 2978 resp.max_wr = wq_init_attr.max_wr; 2979 resp.wqn = wq->wq_num; 2980 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2981 return uverbs_response(attrs, &resp, sizeof(resp)); 2982 2983 err_put_cq: 2984 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2985 UVERBS_LOOKUP_READ); 2986 err_put_pd: 2987 uobj_put_obj_read(pd); 2988 err_uobj: 2989 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2990 2991 return err; 2992 } 2993 2994 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2995 { 2996 struct ib_uverbs_ex_destroy_wq cmd; 2997 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 2998 struct ib_uobject *uobj; 2999 struct ib_uwq_object *obj; 3000 int ret; 3001 3002 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3003 if (ret) 3004 return ret; 3005 3006 if (cmd.comp_mask) 3007 return -EOPNOTSUPP; 3008 3009 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3010 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3011 if (IS_ERR(uobj)) 3012 return PTR_ERR(uobj); 3013 3014 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 3015 resp.events_reported = obj->uevent.events_reported; 3016 3017 uobj_put_destroy(uobj); 3018 3019 return uverbs_response(attrs, &resp, sizeof(resp)); 3020 } 3021 3022 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 3023 { 3024 struct ib_uverbs_ex_modify_wq cmd; 3025 struct ib_wq *wq; 3026 struct ib_wq_attr wq_attr = {}; 3027 int ret; 3028 3029 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3030 if (ret) 3031 return ret; 3032 3033 if (!cmd.attr_mask) 3034 return -EINVAL; 3035 3036 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3037 return -EINVAL; 3038 3039 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3040 if (IS_ERR(wq)) 3041 return PTR_ERR(wq); 3042 3043 if (cmd.attr_mask & IB_WQ_FLAGS) { 3044 wq_attr.flags = cmd.flags; 3045 wq_attr.flags_mask = cmd.flags_mask; 3046 } 3047 3048 if (cmd.attr_mask & IB_WQ_CUR_STATE) { 3049 if (cmd.curr_wq_state > IB_WQS_ERR) 3050 return -EINVAL; 3051 3052 wq_attr.curr_wq_state = cmd.curr_wq_state; 3053 } else { 3054 wq_attr.curr_wq_state = wq->state; 3055 } 3056 3057 if (cmd.attr_mask & IB_WQ_STATE) { 3058 if (cmd.wq_state > IB_WQS_ERR) 3059 return -EINVAL; 3060 3061 wq_attr.wq_state = cmd.wq_state; 3062 } else { 3063 wq_attr.wq_state = wq_attr.curr_wq_state; 3064 } 3065 3066 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3067 &attrs->driver_udata); 3068 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, 3069 UVERBS_LOOKUP_READ); 3070 return ret; 3071 } 3072 3073 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3074 { 3075 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3076 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3077 struct ib_uobject *uobj; 3078 int err; 3079 struct ib_rwq_ind_table_init_attr init_attr = {}; 3080 struct ib_rwq_ind_table *rwq_ind_tbl; 3081 struct ib_wq **wqs = NULL; 3082 u32 *wqs_handles = NULL; 3083 struct ib_wq *wq = NULL; 3084 int i, num_read_wqs; 3085 u32 num_wq_handles; 3086 struct uverbs_req_iter iter; 3087 struct ib_device *ib_dev; 3088 3089 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3090 if (err) 3091 return err; 3092 3093 if (cmd.comp_mask) 3094 return -EOPNOTSUPP; 3095 3096 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3097 return -EINVAL; 3098 3099 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3100 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3101 GFP_KERNEL); 3102 if (!wqs_handles) 3103 return -ENOMEM; 3104 3105 err = uverbs_request_next(&iter, wqs_handles, 3106 num_wq_handles * sizeof(__u32)); 3107 if (err) 3108 goto err_free; 3109 3110 err = uverbs_request_finish(&iter); 3111 if (err) 3112 goto err_free; 3113 3114 wqs = kzalloc_objs(*wqs, num_wq_handles); 3115 if (!wqs) { 3116 err = -ENOMEM; 3117 goto err_free; 3118 } 3119 3120 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3121 num_read_wqs++) { 3122 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3123 wqs_handles[num_read_wqs], attrs); 3124 if (IS_ERR(wq)) { 3125 err = PTR_ERR(wq); 3126 goto put_wqs; 3127 } 3128 3129 wqs[num_read_wqs] = wq; 3130 atomic_inc(&wqs[num_read_wqs]->usecnt); 3131 } 3132 3133 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3134 if (IS_ERR(uobj)) { 3135 err = PTR_ERR(uobj); 3136 goto put_wqs; 3137 } 3138 3139 rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table); 3140 if (!rwq_ind_tbl) { 3141 err = -ENOMEM; 3142 goto err_uobj; 3143 } 3144 3145 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3146 init_attr.ind_tbl = wqs; 3147 3148 rwq_ind_tbl->ind_tbl = wqs; 3149 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3150 rwq_ind_tbl->uobject = uobj; 3151 uobj->object = rwq_ind_tbl; 3152 rwq_ind_tbl->device = ib_dev; 3153 atomic_set(&rwq_ind_tbl->usecnt, 0); 3154 3155 err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr, 3156 &attrs->driver_udata); 3157 if (err) 3158 goto err_create; 3159 3160 for (i = 0; i < num_wq_handles; i++) 3161 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3162 UVERBS_LOOKUP_READ); 3163 kfree(wqs_handles); 3164 uobj_finalize_uobj_create(uobj, attrs); 3165 3166 resp.ind_tbl_handle = uobj->id; 3167 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3168 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3169 return uverbs_response(attrs, &resp, sizeof(resp)); 3170 3171 err_create: 3172 kfree(rwq_ind_tbl); 3173 err_uobj: 3174 uobj_alloc_abort(uobj, attrs); 3175 put_wqs: 3176 for (i = 0; i < num_read_wqs; i++) { 3177 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3178 UVERBS_LOOKUP_READ); 3179 atomic_dec(&wqs[i]->usecnt); 3180 } 3181 err_free: 3182 kfree(wqs_handles); 3183 kfree(wqs); 3184 return err; 3185 } 3186 3187 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3188 { 3189 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3190 int ret; 3191 3192 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3193 if (ret) 3194 return ret; 3195 3196 if (cmd.comp_mask) 3197 return -EOPNOTSUPP; 3198 3199 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3200 cmd.ind_tbl_handle, attrs); 3201 } 3202 3203 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3204 { 3205 struct ib_uverbs_create_flow cmd; 3206 struct ib_uverbs_create_flow_resp resp = {}; 3207 struct ib_uobject *uobj; 3208 struct ib_flow *flow_id; 3209 struct ib_uverbs_flow_attr *kern_flow_attr; 3210 struct ib_flow_attr *flow_attr; 3211 struct ib_qp *qp; 3212 struct ib_uflow_resources *uflow_res; 3213 struct ib_uverbs_flow_spec_hdr *kern_spec; 3214 struct uverbs_req_iter iter; 3215 int err; 3216 void *ib_spec; 3217 int i; 3218 struct ib_device *ib_dev; 3219 3220 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3221 if (err) 3222 return err; 3223 3224 if (cmd.comp_mask) 3225 return -EINVAL; 3226 3227 if (!rdma_uattrs_has_raw_cap(attrs)) 3228 return -EPERM; 3229 3230 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3231 return -EINVAL; 3232 3233 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3234 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3235 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3236 return -EINVAL; 3237 3238 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3239 return -EINVAL; 3240 3241 if (cmd.flow_attr.size > 3242 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3243 return -EINVAL; 3244 3245 if (cmd.flow_attr.reserved[0] || 3246 cmd.flow_attr.reserved[1]) 3247 return -EINVAL; 3248 3249 if (cmd.flow_attr.num_of_specs) { 3250 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3251 GFP_KERNEL); 3252 if (!kern_flow_attr) 3253 return -ENOMEM; 3254 3255 *kern_flow_attr = cmd.flow_attr; 3256 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3257 cmd.flow_attr.size); 3258 if (err) 3259 goto err_free_attr; 3260 } else { 3261 kern_flow_attr = &cmd.flow_attr; 3262 } 3263 3264 err = uverbs_request_finish(&iter); 3265 if (err) 3266 goto err_free_attr; 3267 3268 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3269 if (IS_ERR(uobj)) { 3270 err = PTR_ERR(uobj); 3271 goto err_free_attr; 3272 } 3273 3274 if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) { 3275 err = -EINVAL; 3276 goto err_uobj; 3277 } 3278 3279 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3280 if (IS_ERR(qp)) { 3281 err = PTR_ERR(qp); 3282 goto err_uobj; 3283 } 3284 3285 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3286 err = -EINVAL; 3287 goto err_put; 3288 } 3289 3290 flow_attr = kzalloc_flex(*flow_attr, flows, cmd.flow_attr.num_of_specs); 3291 if (!flow_attr) { 3292 err = -ENOMEM; 3293 goto err_put; 3294 } 3295 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3296 if (!uflow_res) { 3297 err = -ENOMEM; 3298 goto err_free_flow_attr; 3299 } 3300 3301 flow_attr->type = kern_flow_attr->type; 3302 flow_attr->priority = kern_flow_attr->priority; 3303 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3304 flow_attr->port = kern_flow_attr->port; 3305 flow_attr->flags = kern_flow_attr->flags; 3306 flow_attr->size = sizeof(*flow_attr); 3307 3308 kern_spec = kern_flow_attr->flow_specs; 3309 ib_spec = flow_attr + 1; 3310 for (i = 0; i < flow_attr->num_of_specs && 3311 cmd.flow_attr.size >= sizeof(*kern_spec) && 3312 cmd.flow_attr.size >= kern_spec->size; 3313 i++) { 3314 err = kern_spec_to_ib_spec( 3315 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3316 ib_spec, uflow_res); 3317 if (err) 3318 goto err_free; 3319 3320 flow_attr->size += 3321 ((union ib_flow_spec *) ib_spec)->size; 3322 cmd.flow_attr.size -= kern_spec->size; 3323 kern_spec = ((void *)kern_spec) + kern_spec->size; 3324 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3325 } 3326 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3327 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n", 3328 i, cmd.flow_attr.size); 3329 err = -EINVAL; 3330 goto err_free; 3331 } 3332 3333 flow_id = qp->device->ops.create_flow(qp, flow_attr, 3334 &attrs->driver_udata); 3335 3336 if (IS_ERR(flow_id)) { 3337 err = PTR_ERR(flow_id); 3338 goto err_free; 3339 } 3340 3341 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3342 3343 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3344 UVERBS_LOOKUP_READ); 3345 kfree(flow_attr); 3346 3347 if (cmd.flow_attr.num_of_specs) 3348 kfree(kern_flow_attr); 3349 uobj_finalize_uobj_create(uobj, attrs); 3350 3351 resp.flow_handle = uobj->id; 3352 return uverbs_response(attrs, &resp, sizeof(resp)); 3353 3354 err_free: 3355 ib_uverbs_flow_resources_free(uflow_res); 3356 err_free_flow_attr: 3357 kfree(flow_attr); 3358 err_put: 3359 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3360 UVERBS_LOOKUP_READ); 3361 err_uobj: 3362 uobj_alloc_abort(uobj, attrs); 3363 err_free_attr: 3364 if (cmd.flow_attr.num_of_specs) 3365 kfree(kern_flow_attr); 3366 return err; 3367 } 3368 3369 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3370 { 3371 struct ib_uverbs_destroy_flow cmd; 3372 int ret; 3373 3374 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3375 if (ret) 3376 return ret; 3377 3378 if (cmd.comp_mask) 3379 return -EINVAL; 3380 3381 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3382 } 3383 3384 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3385 struct ib_uverbs_create_xsrq *cmd, 3386 struct ib_udata *udata) 3387 { 3388 struct ib_uverbs_create_srq_resp resp = {}; 3389 struct ib_usrq_object *obj; 3390 struct ib_pd *pd; 3391 struct ib_srq *srq; 3392 struct ib_srq_init_attr attr; 3393 int ret; 3394 struct ib_uobject *xrcd_uobj; 3395 struct ib_device *ib_dev; 3396 3397 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3398 &ib_dev); 3399 if (IS_ERR(obj)) 3400 return PTR_ERR(obj); 3401 3402 if (cmd->srq_type == IB_SRQT_TM) 3403 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3404 3405 if (cmd->srq_type == IB_SRQT_XRC) { 3406 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3407 attrs); 3408 if (IS_ERR(xrcd_uobj)) { 3409 ret = -EINVAL; 3410 goto err; 3411 } 3412 3413 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3414 if (!attr.ext.xrc.xrcd) { 3415 ret = -EINVAL; 3416 goto err_put_xrcd; 3417 } 3418 3419 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3420 atomic_inc(&obj->uxrcd->refcnt); 3421 } 3422 3423 if (ib_srq_has_cq(cmd->srq_type)) { 3424 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3425 cmd->cq_handle, attrs); 3426 if (IS_ERR(attr.ext.cq)) { 3427 ret = PTR_ERR(attr.ext.cq); 3428 goto err_put_xrcd; 3429 } 3430 } 3431 3432 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3433 if (IS_ERR(pd)) { 3434 ret = PTR_ERR(pd); 3435 goto err_put_cq; 3436 } 3437 3438 attr.event_handler = ib_uverbs_srq_event_handler; 3439 attr.srq_type = cmd->srq_type; 3440 attr.attr.max_wr = cmd->max_wr; 3441 attr.attr.max_sge = cmd->max_sge; 3442 attr.attr.srq_limit = cmd->srq_limit; 3443 3444 INIT_LIST_HEAD(&obj->uevent.event_list); 3445 obj->uevent.uobject.user_handle = cmd->user_handle; 3446 3447 srq = ib_create_srq_user(pd, &attr, obj, udata); 3448 if (IS_ERR(srq)) { 3449 ret = PTR_ERR(srq); 3450 goto err_put_pd; 3451 } 3452 3453 obj->uevent.uobject.object = srq; 3454 obj->uevent.uobject.user_handle = cmd->user_handle; 3455 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 3456 if (obj->uevent.event_file) 3457 uverbs_uobject_get(&obj->uevent.event_file->uobj); 3458 3459 if (cmd->srq_type == IB_SRQT_XRC) 3460 resp.srqn = srq->ext.xrc.srq_num; 3461 3462 if (cmd->srq_type == IB_SRQT_XRC) 3463 uobj_put_read(xrcd_uobj); 3464 3465 if (ib_srq_has_cq(cmd->srq_type)) 3466 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3467 UVERBS_LOOKUP_READ); 3468 3469 uobj_put_obj_read(pd); 3470 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 3471 3472 resp.srq_handle = obj->uevent.uobject.id; 3473 resp.max_wr = attr.attr.max_wr; 3474 resp.max_sge = attr.attr.max_sge; 3475 return uverbs_response(attrs, &resp, sizeof(resp)); 3476 3477 err_put_pd: 3478 uobj_put_obj_read(pd); 3479 err_put_cq: 3480 if (ib_srq_has_cq(cmd->srq_type)) 3481 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3482 UVERBS_LOOKUP_READ); 3483 3484 err_put_xrcd: 3485 if (cmd->srq_type == IB_SRQT_XRC) { 3486 atomic_dec(&obj->uxrcd->refcnt); 3487 uobj_put_read(xrcd_uobj); 3488 } 3489 3490 err: 3491 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3492 return ret; 3493 } 3494 3495 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3496 { 3497 struct ib_uverbs_create_srq cmd; 3498 struct ib_uverbs_create_xsrq xcmd; 3499 int ret; 3500 3501 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3502 if (ret) 3503 return ret; 3504 3505 memset(&xcmd, 0, sizeof(xcmd)); 3506 xcmd.response = cmd.response; 3507 xcmd.user_handle = cmd.user_handle; 3508 xcmd.srq_type = IB_SRQT_BASIC; 3509 xcmd.pd_handle = cmd.pd_handle; 3510 xcmd.max_wr = cmd.max_wr; 3511 xcmd.max_sge = cmd.max_sge; 3512 xcmd.srq_limit = cmd.srq_limit; 3513 3514 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3515 } 3516 3517 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3518 { 3519 struct ib_uverbs_create_xsrq cmd; 3520 int ret; 3521 3522 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3523 if (ret) 3524 return ret; 3525 3526 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3527 } 3528 3529 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3530 { 3531 struct ib_uverbs_modify_srq cmd; 3532 struct ib_srq *srq; 3533 struct ib_srq_attr attr; 3534 int ret; 3535 3536 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3537 if (ret) 3538 return ret; 3539 3540 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3541 if (IS_ERR(srq)) 3542 return PTR_ERR(srq); 3543 3544 attr.max_wr = cmd.max_wr; 3545 attr.srq_limit = cmd.srq_limit; 3546 3547 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3548 &attrs->driver_udata); 3549 3550 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3551 UVERBS_LOOKUP_READ); 3552 3553 return ret; 3554 } 3555 3556 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3557 { 3558 struct ib_uverbs_query_srq cmd; 3559 struct ib_uverbs_query_srq_resp resp; 3560 struct ib_srq_attr attr; 3561 struct ib_srq *srq; 3562 int ret; 3563 3564 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3565 if (ret) 3566 return ret; 3567 3568 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3569 if (IS_ERR(srq)) 3570 return PTR_ERR(srq); 3571 3572 ret = ib_query_srq(srq, &attr); 3573 3574 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3575 UVERBS_LOOKUP_READ); 3576 3577 if (ret) 3578 return ret; 3579 3580 memset(&resp, 0, sizeof resp); 3581 3582 resp.max_wr = attr.max_wr; 3583 resp.max_sge = attr.max_sge; 3584 resp.srq_limit = attr.srq_limit; 3585 3586 return uverbs_response(attrs, &resp, sizeof(resp)); 3587 } 3588 3589 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3590 { 3591 struct ib_uverbs_destroy_srq cmd; 3592 struct ib_uverbs_destroy_srq_resp resp; 3593 struct ib_uobject *uobj; 3594 struct ib_uevent_object *obj; 3595 int ret; 3596 3597 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3598 if (ret) 3599 return ret; 3600 3601 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3602 if (IS_ERR(uobj)) 3603 return PTR_ERR(uobj); 3604 3605 obj = container_of(uobj, struct ib_uevent_object, uobject); 3606 memset(&resp, 0, sizeof(resp)); 3607 resp.events_reported = obj->events_reported; 3608 3609 uobj_put_destroy(uobj); 3610 3611 return uverbs_response(attrs, &resp, sizeof(resp)); 3612 } 3613 3614 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3615 { 3616 struct ib_uverbs_ex_query_device_resp resp = {}; 3617 struct ib_uverbs_ex_query_device cmd; 3618 struct ib_device_attr attr = {0}; 3619 struct ib_ucontext *ucontext; 3620 struct ib_device *ib_dev; 3621 int err; 3622 3623 ucontext = ib_uverbs_get_ucontext(attrs); 3624 if (IS_ERR(ucontext)) 3625 return PTR_ERR(ucontext); 3626 ib_dev = ucontext->device; 3627 3628 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3629 if (err) 3630 return err; 3631 3632 if (cmd.comp_mask) 3633 return -EINVAL; 3634 3635 if (cmd.reserved) 3636 return -EINVAL; 3637 3638 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3639 if (err) 3640 return err; 3641 3642 copy_query_dev_fields(ucontext, &resp.base, &attr); 3643 3644 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3645 resp.odp_caps.per_transport_caps.rc_odp_caps = 3646 attr.odp_caps.per_transport_caps.rc_odp_caps; 3647 resp.odp_caps.per_transport_caps.uc_odp_caps = 3648 attr.odp_caps.per_transport_caps.uc_odp_caps; 3649 resp.odp_caps.per_transport_caps.ud_odp_caps = 3650 attr.odp_caps.per_transport_caps.ud_odp_caps; 3651 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3652 3653 resp.timestamp_mask = attr.timestamp_mask; 3654 resp.hca_core_clock = attr.hca_core_clock; 3655 resp.device_cap_flags_ex = attr.device_cap_flags; 3656 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3657 resp.rss_caps.max_rwq_indirection_tables = 3658 attr.rss_caps.max_rwq_indirection_tables; 3659 resp.rss_caps.max_rwq_indirection_table_size = 3660 attr.rss_caps.max_rwq_indirection_table_size; 3661 resp.max_wq_type_rq = attr.max_wq_type_rq; 3662 resp.raw_packet_caps = attr.raw_packet_caps; 3663 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3664 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3665 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3666 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3667 resp.tm_caps.flags = attr.tm_caps.flags; 3668 resp.cq_moderation_caps.max_cq_moderation_count = 3669 attr.cq_caps.max_cq_moderation_count; 3670 resp.cq_moderation_caps.max_cq_moderation_period = 3671 attr.cq_caps.max_cq_moderation_period; 3672 resp.max_dm_size = attr.max_dm_size; 3673 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3674 3675 return uverbs_response(attrs, &resp, sizeof(resp)); 3676 } 3677 3678 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3679 { 3680 struct ib_uverbs_ex_modify_cq cmd; 3681 struct ib_cq *cq; 3682 int ret; 3683 3684 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3685 if (ret) 3686 return ret; 3687 3688 if (!cmd.attr_mask || cmd.reserved) 3689 return -EINVAL; 3690 3691 if (cmd.attr_mask > IB_CQ_MODERATE) 3692 return -EOPNOTSUPP; 3693 3694 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3695 if (IS_ERR(cq)) 3696 return PTR_ERR(cq); 3697 3698 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3699 3700 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3701 UVERBS_LOOKUP_READ); 3702 return ret; 3703 } 3704 3705 /* 3706 * Describe the input structs for write(). Some write methods have an input 3707 * only struct, most have an input and output. If the struct has an output then 3708 * the 'response' u64 must be the first field in the request structure. 3709 * 3710 * If udata is present then both the request and response structs have a 3711 * trailing driver_data flex array. In this case the size of the base struct 3712 * cannot be changed. 3713 */ 3714 #define UAPI_DEF_WRITE_IO(req, resp) \ 3715 .write.has_resp = 1 + \ 3716 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3717 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \ 3718 sizeof(u64)), \ 3719 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3720 3721 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3722 3723 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3724 UAPI_DEF_WRITE_IO(req, resp), \ 3725 .write.has_udata = \ 3726 1 + \ 3727 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3728 sizeof(req)) + \ 3729 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3730 sizeof(resp)) 3731 3732 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3733 UAPI_DEF_WRITE_I(req), \ 3734 .write.has_udata = \ 3735 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3736 sizeof(req)) 3737 3738 /* 3739 * The _EX versions are for use with WRITE_EX and allow the last struct member 3740 * to be specified. Buffers that do not include that member will be rejected. 3741 */ 3742 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3743 .write.has_resp = 1, \ 3744 .write.req_size = offsetofend(req, req_last_member), \ 3745 .write.resp_size = offsetofend(resp, resp_last_member) 3746 3747 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3748 .write.req_size = offsetofend(req, req_last_member) 3749 3750 const struct uapi_definition uverbs_def_write_intf[] = { 3751 DECLARE_UVERBS_OBJECT( 3752 UVERBS_OBJECT_AH, 3753 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3754 ib_uverbs_create_ah, 3755 UAPI_DEF_WRITE_UDATA_IO( 3756 struct ib_uverbs_create_ah, 3757 struct ib_uverbs_create_ah_resp)), 3758 DECLARE_UVERBS_WRITE( 3759 IB_USER_VERBS_CMD_DESTROY_AH, 3760 ib_uverbs_destroy_ah, 3761 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)), 3762 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah), 3763 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)), 3764 3765 DECLARE_UVERBS_OBJECT( 3766 UVERBS_OBJECT_COMP_CHANNEL, 3767 DECLARE_UVERBS_WRITE( 3768 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3769 ib_uverbs_create_comp_channel, 3770 UAPI_DEF_WRITE_IO( 3771 struct ib_uverbs_create_comp_channel, 3772 struct ib_uverbs_create_comp_channel_resp))), 3773 3774 DECLARE_UVERBS_OBJECT( 3775 UVERBS_OBJECT_CQ, 3776 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3777 ib_uverbs_create_cq, 3778 UAPI_DEF_WRITE_UDATA_IO( 3779 struct ib_uverbs_create_cq, 3780 struct ib_uverbs_create_cq_resp), 3781 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3782 DECLARE_UVERBS_WRITE( 3783 IB_USER_VERBS_CMD_DESTROY_CQ, 3784 ib_uverbs_destroy_cq, 3785 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3786 struct ib_uverbs_destroy_cq_resp), 3787 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3788 DECLARE_UVERBS_WRITE( 3789 IB_USER_VERBS_CMD_POLL_CQ, 3790 ib_uverbs_poll_cq, 3791 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3792 struct ib_uverbs_poll_cq_resp), 3793 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3794 DECLARE_UVERBS_WRITE( 3795 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3796 ib_uverbs_req_notify_cq, 3797 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3798 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3799 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3800 ib_uverbs_resize_cq, 3801 UAPI_DEF_WRITE_UDATA_IO( 3802 struct ib_uverbs_resize_cq, 3803 struct ib_uverbs_resize_cq_resp), 3804 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3805 DECLARE_UVERBS_WRITE_EX( 3806 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3807 ib_uverbs_ex_create_cq, 3808 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3809 reserved, 3810 struct ib_uverbs_ex_create_cq_resp, 3811 response_length), 3812 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3813 DECLARE_UVERBS_WRITE_EX( 3814 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3815 ib_uverbs_ex_modify_cq, 3816 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3817 UAPI_DEF_METHOD_NEEDS_FN(modify_cq))), 3818 3819 DECLARE_UVERBS_OBJECT( 3820 UVERBS_OBJECT_DEVICE, 3821 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3822 ib_uverbs_get_context, 3823 UAPI_DEF_WRITE_UDATA_IO( 3824 struct ib_uverbs_get_context, 3825 struct ib_uverbs_get_context_resp)), 3826 DECLARE_UVERBS_WRITE( 3827 IB_USER_VERBS_CMD_QUERY_DEVICE, 3828 ib_uverbs_query_device, 3829 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3830 struct ib_uverbs_query_device_resp)), 3831 DECLARE_UVERBS_WRITE( 3832 IB_USER_VERBS_CMD_QUERY_PORT, 3833 ib_uverbs_query_port, 3834 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3835 struct ib_uverbs_query_port_resp), 3836 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3837 DECLARE_UVERBS_WRITE_EX( 3838 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3839 ib_uverbs_ex_query_device, 3840 UAPI_DEF_WRITE_IO_EX( 3841 struct ib_uverbs_ex_query_device, 3842 reserved, 3843 struct ib_uverbs_ex_query_device_resp, 3844 response_length), 3845 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3846 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3847 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3848 3849 DECLARE_UVERBS_OBJECT( 3850 UVERBS_OBJECT_FLOW, 3851 DECLARE_UVERBS_WRITE_EX( 3852 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3853 ib_uverbs_ex_create_flow, 3854 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3855 flow_attr, 3856 struct ib_uverbs_create_flow_resp, 3857 flow_handle), 3858 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3859 DECLARE_UVERBS_WRITE_EX( 3860 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3861 ib_uverbs_ex_destroy_flow, 3862 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3863 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3864 3865 DECLARE_UVERBS_OBJECT( 3866 UVERBS_OBJECT_MR, 3867 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3868 ib_uverbs_dereg_mr, 3869 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3870 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3871 DECLARE_UVERBS_WRITE( 3872 IB_USER_VERBS_CMD_REG_MR, 3873 ib_uverbs_reg_mr, 3874 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3875 struct ib_uverbs_reg_mr_resp), 3876 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3877 DECLARE_UVERBS_WRITE( 3878 IB_USER_VERBS_CMD_REREG_MR, 3879 ib_uverbs_rereg_mr, 3880 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3881 struct ib_uverbs_rereg_mr_resp), 3882 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3883 3884 DECLARE_UVERBS_OBJECT( 3885 UVERBS_OBJECT_MW, 3886 DECLARE_UVERBS_WRITE( 3887 IB_USER_VERBS_CMD_ALLOC_MW, 3888 ib_uverbs_alloc_mw, 3889 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3890 struct ib_uverbs_alloc_mw_resp), 3891 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3892 DECLARE_UVERBS_WRITE( 3893 IB_USER_VERBS_CMD_DEALLOC_MW, 3894 ib_uverbs_dealloc_mw, 3895 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3896 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3897 3898 DECLARE_UVERBS_OBJECT( 3899 UVERBS_OBJECT_PD, 3900 DECLARE_UVERBS_WRITE( 3901 IB_USER_VERBS_CMD_ALLOC_PD, 3902 ib_uverbs_alloc_pd, 3903 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3904 struct ib_uverbs_alloc_pd_resp), 3905 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3906 DECLARE_UVERBS_WRITE( 3907 IB_USER_VERBS_CMD_DEALLOC_PD, 3908 ib_uverbs_dealloc_pd, 3909 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3910 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3911 3912 DECLARE_UVERBS_OBJECT( 3913 UVERBS_OBJECT_QP, 3914 DECLARE_UVERBS_WRITE( 3915 IB_USER_VERBS_CMD_ATTACH_MCAST, 3916 ib_uverbs_attach_mcast, 3917 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3918 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3919 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3920 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3921 ib_uverbs_create_qp, 3922 UAPI_DEF_WRITE_UDATA_IO( 3923 struct ib_uverbs_create_qp, 3924 struct ib_uverbs_create_qp_resp), 3925 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3926 DECLARE_UVERBS_WRITE( 3927 IB_USER_VERBS_CMD_DESTROY_QP, 3928 ib_uverbs_destroy_qp, 3929 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3930 struct ib_uverbs_destroy_qp_resp), 3931 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3932 DECLARE_UVERBS_WRITE( 3933 IB_USER_VERBS_CMD_DETACH_MCAST, 3934 ib_uverbs_detach_mcast, 3935 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3936 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3937 DECLARE_UVERBS_WRITE( 3938 IB_USER_VERBS_CMD_MODIFY_QP, 3939 ib_uverbs_modify_qp, 3940 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3941 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3942 DECLARE_UVERBS_WRITE( 3943 IB_USER_VERBS_CMD_POST_RECV, 3944 ib_uverbs_post_recv, 3945 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3946 struct ib_uverbs_post_recv_resp), 3947 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3948 DECLARE_UVERBS_WRITE( 3949 IB_USER_VERBS_CMD_POST_SEND, 3950 ib_uverbs_post_send, 3951 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3952 struct ib_uverbs_post_send_resp), 3953 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3954 DECLARE_UVERBS_WRITE( 3955 IB_USER_VERBS_CMD_QUERY_QP, 3956 ib_uverbs_query_qp, 3957 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3958 struct ib_uverbs_query_qp_resp), 3959 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3960 DECLARE_UVERBS_WRITE_EX( 3961 IB_USER_VERBS_EX_CMD_CREATE_QP, 3962 ib_uverbs_ex_create_qp, 3963 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3964 comp_mask, 3965 struct ib_uverbs_ex_create_qp_resp, 3966 response_length), 3967 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3968 DECLARE_UVERBS_WRITE_EX( 3969 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3970 ib_uverbs_ex_modify_qp, 3971 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3972 base, 3973 struct ib_uverbs_ex_modify_qp_resp, 3974 response_length), 3975 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3976 3977 DECLARE_UVERBS_OBJECT( 3978 UVERBS_OBJECT_RWQ_IND_TBL, 3979 DECLARE_UVERBS_WRITE_EX( 3980 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3981 ib_uverbs_ex_create_rwq_ind_table, 3982 UAPI_DEF_WRITE_IO_EX( 3983 struct ib_uverbs_ex_create_rwq_ind_table, 3984 log_ind_tbl_size, 3985 struct ib_uverbs_ex_create_rwq_ind_table_resp, 3986 ind_tbl_num), 3987 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 3988 DECLARE_UVERBS_WRITE_EX( 3989 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 3990 ib_uverbs_ex_destroy_rwq_ind_table, 3991 UAPI_DEF_WRITE_I( 3992 struct ib_uverbs_ex_destroy_rwq_ind_table), 3993 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 3994 3995 DECLARE_UVERBS_OBJECT( 3996 UVERBS_OBJECT_WQ, 3997 DECLARE_UVERBS_WRITE_EX( 3998 IB_USER_VERBS_EX_CMD_CREATE_WQ, 3999 ib_uverbs_ex_create_wq, 4000 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 4001 max_sge, 4002 struct ib_uverbs_ex_create_wq_resp, 4003 wqn), 4004 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 4005 DECLARE_UVERBS_WRITE_EX( 4006 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 4007 ib_uverbs_ex_destroy_wq, 4008 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 4009 wq_handle, 4010 struct ib_uverbs_ex_destroy_wq_resp, 4011 reserved), 4012 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 4013 DECLARE_UVERBS_WRITE_EX( 4014 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 4015 ib_uverbs_ex_modify_wq, 4016 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 4017 curr_wq_state), 4018 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 4019 4020 DECLARE_UVERBS_OBJECT( 4021 UVERBS_OBJECT_SRQ, 4022 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 4023 ib_uverbs_create_srq, 4024 UAPI_DEF_WRITE_UDATA_IO( 4025 struct ib_uverbs_create_srq, 4026 struct ib_uverbs_create_srq_resp), 4027 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4028 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 4029 ib_uverbs_create_xsrq, 4030 UAPI_DEF_WRITE_UDATA_IO( 4031 struct ib_uverbs_create_xsrq, 4032 struct ib_uverbs_create_srq_resp), 4033 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4034 DECLARE_UVERBS_WRITE( 4035 IB_USER_VERBS_CMD_DESTROY_SRQ, 4036 ib_uverbs_destroy_srq, 4037 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4038 struct ib_uverbs_destroy_srq_resp), 4039 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4040 DECLARE_UVERBS_WRITE( 4041 IB_USER_VERBS_CMD_MODIFY_SRQ, 4042 ib_uverbs_modify_srq, 4043 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4044 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4045 DECLARE_UVERBS_WRITE( 4046 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4047 ib_uverbs_post_srq_recv, 4048 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4049 struct ib_uverbs_post_srq_recv_resp), 4050 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4051 DECLARE_UVERBS_WRITE( 4052 IB_USER_VERBS_CMD_QUERY_SRQ, 4053 ib_uverbs_query_srq, 4054 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4055 struct ib_uverbs_query_srq_resp), 4056 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4057 4058 DECLARE_UVERBS_OBJECT( 4059 UVERBS_OBJECT_XRCD, 4060 DECLARE_UVERBS_WRITE( 4061 IB_USER_VERBS_CMD_CLOSE_XRCD, 4062 ib_uverbs_close_xrcd, 4063 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)), 4064 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4065 ib_uverbs_open_qp, 4066 UAPI_DEF_WRITE_UDATA_IO( 4067 struct ib_uverbs_open_qp, 4068 struct ib_uverbs_create_qp_resp)), 4069 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4070 ib_uverbs_open_xrcd, 4071 UAPI_DEF_WRITE_UDATA_IO( 4072 struct ib_uverbs_open_xrcd, 4073 struct ib_uverbs_open_xrcd_resp)), 4074 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd), 4075 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)), 4076 4077 {}, 4078 }; 4079