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_core.h" 46 47 #include "uverbs.h" 48 #include "core_priv.h" 49 50 /* 51 * Copy a response to userspace. If the provided 'resp' is larger than the 52 * user buffer it is silently truncated. If the user provided a larger buffer 53 * then the trailing portion is zero filled. 54 * 55 * These semantics are intended to support future extension of the output 56 * structures. 57 */ 58 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp, 59 size_t resp_len) 60 { 61 int ret; 62 63 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 64 return uverbs_copy_to_struct_or_zero( 65 attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len); 66 67 if (copy_to_user(attrs->ucore.outbuf, resp, 68 min(attrs->ucore.outlen, resp_len))) 69 return -EFAULT; 70 71 if (resp_len < attrs->ucore.outlen) { 72 /* 73 * Zero fill any extra memory that user 74 * space might have provided. 75 */ 76 ret = clear_user(attrs->ucore.outbuf + resp_len, 77 attrs->ucore.outlen - resp_len); 78 if (ret) 79 return -EFAULT; 80 } 81 82 return 0; 83 } 84 85 /* 86 * Copy a request from userspace. If the provided 'req' is larger than the 87 * user buffer then the user buffer is zero extended into the 'req'. If 'req' 88 * is smaller than the user buffer then the uncopied bytes in the user buffer 89 * must be zero. 90 */ 91 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req, 92 size_t req_len) 93 { 94 if (copy_from_user(req, attrs->ucore.inbuf, 95 min(attrs->ucore.inlen, req_len))) 96 return -EFAULT; 97 98 if (attrs->ucore.inlen < req_len) { 99 memset(req + attrs->ucore.inlen, 0, 100 req_len - attrs->ucore.inlen); 101 } else if (attrs->ucore.inlen > req_len) { 102 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len, 103 attrs->ucore.inlen - req_len)) 104 return -EOPNOTSUPP; 105 } 106 return 0; 107 } 108 109 /* 110 * Generate the value for the 'response_length' protocol used by write_ex. 111 * This is the number of bytes the kernel actually wrote. Userspace can use 112 * this to detect what structure members in the response the kernel 113 * understood. 114 */ 115 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs, 116 size_t resp_len) 117 { 118 return min_t(size_t, attrs->ucore.outlen, resp_len); 119 } 120 121 /* 122 * The iterator version of the request interface is for handlers that need to 123 * step over a flex array at the end of a command header. 124 */ 125 struct uverbs_req_iter { 126 const void __user *cur; 127 const void __user *end; 128 }; 129 130 static int uverbs_request_start(struct uverbs_attr_bundle *attrs, 131 struct uverbs_req_iter *iter, 132 void *req, 133 size_t req_len) 134 { 135 if (attrs->ucore.inlen < req_len) 136 return -ENOSPC; 137 138 if (copy_from_user(req, attrs->ucore.inbuf, req_len)) 139 return -EFAULT; 140 141 iter->cur = attrs->ucore.inbuf + req_len; 142 iter->end = attrs->ucore.inbuf + attrs->ucore.inlen; 143 return 0; 144 } 145 146 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val, 147 size_t len) 148 { 149 if (iter->cur + len > iter->end) 150 return -ENOSPC; 151 152 if (copy_from_user(val, iter->cur, len)) 153 return -EFAULT; 154 155 iter->cur += len; 156 return 0; 157 } 158 159 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter, 160 size_t len) 161 { 162 const void __user *res = iter->cur; 163 164 if (iter->cur + len > iter->end) 165 return (void __force __user *)ERR_PTR(-ENOSPC); 166 iter->cur += len; 167 return res; 168 } 169 170 static int uverbs_request_finish(struct uverbs_req_iter *iter) 171 { 172 if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur)) 173 return -EOPNOTSUPP; 174 return 0; 175 } 176 177 /* 178 * When calling a destroy function during an error unwind we need to pass in 179 * the udata that is sanitized of all user arguments. Ie from the driver 180 * perspective it looks like no udata was passed. 181 */ 182 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs) 183 { 184 attrs->driver_udata = (struct ib_udata){}; 185 return &attrs->driver_udata; 186 } 187 188 static struct ib_uverbs_completion_event_file * 189 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs) 190 { 191 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL, 192 fd, attrs); 193 194 if (IS_ERR(uobj)) 195 return (void *)uobj; 196 197 uverbs_uobject_get(uobj); 198 uobj_put_read(uobj); 199 200 return container_of(uobj, struct ib_uverbs_completion_event_file, 201 uobj); 202 } 203 #define ib_uverbs_lookup_comp_file(_fd, _ufile) \ 204 _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile) 205 206 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs) 207 { 208 struct ib_uverbs_file *ufile = attrs->ufile; 209 struct ib_ucontext *ucontext; 210 struct ib_device *ib_dev; 211 212 ib_dev = srcu_dereference(ufile->device->ib_dev, 213 &ufile->device->disassociate_srcu); 214 if (!ib_dev) 215 return -EIO; 216 217 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext); 218 if (!ucontext) 219 return -ENOMEM; 220 221 ucontext->device = ib_dev; 222 ucontext->ufile = ufile; 223 xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC); 224 225 rdma_restrack_new(&ucontext->res, RDMA_RESTRACK_CTX); 226 rdma_restrack_set_name(&ucontext->res, NULL); 227 attrs->context = ucontext; 228 return 0; 229 } 230 231 int ib_init_ucontext(struct uverbs_attr_bundle *attrs) 232 { 233 struct ib_ucontext *ucontext = attrs->context; 234 struct ib_uverbs_file *file = attrs->ufile; 235 int ret; 236 237 if (!down_read_trylock(&file->hw_destroy_rwsem)) 238 return -EIO; 239 mutex_lock(&file->ucontext_lock); 240 if (file->ucontext) { 241 ret = -EINVAL; 242 goto err; 243 } 244 245 ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device, 246 RDMACG_RESOURCE_HCA_HANDLE); 247 if (ret) 248 goto err; 249 250 ret = ucontext->device->ops.alloc_ucontext(ucontext, 251 &attrs->driver_udata); 252 if (ret) 253 goto err_uncharge; 254 255 rdma_restrack_add(&ucontext->res); 256 257 /* 258 * Make sure that ib_uverbs_get_ucontext() sees the pointer update 259 * only after all writes to setup the ucontext have completed 260 */ 261 smp_store_release(&file->ucontext, ucontext); 262 263 mutex_unlock(&file->ucontext_lock); 264 up_read(&file->hw_destroy_rwsem); 265 return 0; 266 267 err_uncharge: 268 ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device, 269 RDMACG_RESOURCE_HCA_HANDLE); 270 err: 271 mutex_unlock(&file->ucontext_lock); 272 up_read(&file->hw_destroy_rwsem); 273 return ret; 274 } 275 276 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs) 277 { 278 struct ib_uverbs_get_context_resp resp; 279 struct ib_uverbs_get_context cmd; 280 struct ib_device *ib_dev; 281 struct ib_uobject *uobj; 282 int ret; 283 284 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 285 if (ret) 286 return ret; 287 288 ret = ib_alloc_ucontext(attrs); 289 if (ret) 290 return ret; 291 292 uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev); 293 if (IS_ERR(uobj)) { 294 ret = PTR_ERR(uobj); 295 goto err_ucontext; 296 } 297 298 resp = (struct ib_uverbs_get_context_resp){ 299 .num_comp_vectors = attrs->ufile->device->num_comp_vectors, 300 .async_fd = uobj->id, 301 }; 302 ret = uverbs_response(attrs, &resp, sizeof(resp)); 303 if (ret) 304 goto err_uobj; 305 306 ret = ib_init_ucontext(attrs); 307 if (ret) 308 goto err_uobj; 309 310 ib_uverbs_init_async_event_file( 311 container_of(uobj, struct ib_uverbs_async_event_file, uobj)); 312 rdma_alloc_commit_uobject(uobj, attrs); 313 return 0; 314 315 err_uobj: 316 rdma_alloc_abort_uobject(uobj, attrs, false); 317 err_ucontext: 318 rdma_restrack_put(&attrs->context->res); 319 kfree(attrs->context); 320 attrs->context = NULL; 321 return ret; 322 } 323 324 static void copy_query_dev_fields(struct ib_ucontext *ucontext, 325 struct ib_uverbs_query_device_resp *resp, 326 struct ib_device_attr *attr) 327 { 328 struct ib_device *ib_dev = ucontext->device; 329 330 resp->fw_ver = attr->fw_ver; 331 resp->node_guid = ib_dev->node_guid; 332 resp->sys_image_guid = attr->sys_image_guid; 333 resp->max_mr_size = attr->max_mr_size; 334 resp->page_size_cap = attr->page_size_cap; 335 resp->vendor_id = attr->vendor_id; 336 resp->vendor_part_id = attr->vendor_part_id; 337 resp->hw_ver = attr->hw_ver; 338 resp->max_qp = attr->max_qp; 339 resp->max_qp_wr = attr->max_qp_wr; 340 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags); 341 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge); 342 resp->max_sge_rd = attr->max_sge_rd; 343 resp->max_cq = attr->max_cq; 344 resp->max_cqe = attr->max_cqe; 345 resp->max_mr = attr->max_mr; 346 resp->max_pd = attr->max_pd; 347 resp->max_qp_rd_atom = attr->max_qp_rd_atom; 348 resp->max_ee_rd_atom = attr->max_ee_rd_atom; 349 resp->max_res_rd_atom = attr->max_res_rd_atom; 350 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; 351 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; 352 resp->atomic_cap = attr->atomic_cap; 353 resp->max_ee = attr->max_ee; 354 resp->max_rdd = attr->max_rdd; 355 resp->max_mw = attr->max_mw; 356 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; 357 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; 358 resp->max_mcast_grp = attr->max_mcast_grp; 359 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; 360 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; 361 resp->max_ah = attr->max_ah; 362 resp->max_srq = attr->max_srq; 363 resp->max_srq_wr = attr->max_srq_wr; 364 resp->max_srq_sge = attr->max_srq_sge; 365 resp->max_pkeys = attr->max_pkeys; 366 resp->local_ca_ack_delay = attr->local_ca_ack_delay; 367 resp->phys_port_cnt = ib_dev->phys_port_cnt; 368 } 369 370 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs) 371 { 372 struct ib_uverbs_query_device cmd; 373 struct ib_uverbs_query_device_resp resp; 374 struct ib_ucontext *ucontext; 375 int ret; 376 377 ucontext = ib_uverbs_get_ucontext(attrs); 378 if (IS_ERR(ucontext)) 379 return PTR_ERR(ucontext); 380 381 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 382 if (ret) 383 return ret; 384 385 memset(&resp, 0, sizeof resp); 386 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs); 387 388 return uverbs_response(attrs, &resp, sizeof(resp)); 389 } 390 391 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs) 392 { 393 struct ib_uverbs_query_port cmd; 394 struct ib_uverbs_query_port_resp resp; 395 struct ib_port_attr attr; 396 int ret; 397 struct ib_ucontext *ucontext; 398 struct ib_device *ib_dev; 399 400 ucontext = ib_uverbs_get_ucontext(attrs); 401 if (IS_ERR(ucontext)) 402 return PTR_ERR(ucontext); 403 ib_dev = ucontext->device; 404 405 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 406 if (ret) 407 return ret; 408 409 ret = ib_query_port(ib_dev, cmd.port_num, &attr); 410 if (ret) 411 return ret; 412 413 memset(&resp, 0, sizeof resp); 414 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num); 415 416 return uverbs_response(attrs, &resp, sizeof(resp)); 417 } 418 419 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs) 420 { 421 struct ib_uverbs_alloc_pd_resp resp = {}; 422 struct ib_uverbs_alloc_pd cmd; 423 struct ib_uobject *uobj; 424 struct ib_pd *pd; 425 int ret; 426 struct ib_device *ib_dev; 427 428 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 429 if (ret) 430 return ret; 431 432 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev); 433 if (IS_ERR(uobj)) 434 return PTR_ERR(uobj); 435 436 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd); 437 if (!pd) { 438 ret = -ENOMEM; 439 goto err; 440 } 441 442 pd->device = ib_dev; 443 pd->uobject = uobj; 444 atomic_set(&pd->usecnt, 0); 445 446 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD); 447 rdma_restrack_set_name(&pd->res, NULL); 448 449 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata); 450 if (ret) 451 goto err_alloc; 452 rdma_restrack_add(&pd->res); 453 454 uobj->object = pd; 455 uobj_finalize_uobj_create(uobj, attrs); 456 457 resp.pd_handle = uobj->id; 458 return uverbs_response(attrs, &resp, sizeof(resp)); 459 460 err_alloc: 461 rdma_restrack_put(&pd->res); 462 kfree(pd); 463 err: 464 uobj_alloc_abort(uobj, attrs); 465 return ret; 466 } 467 468 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs) 469 { 470 struct ib_uverbs_dealloc_pd cmd; 471 int ret; 472 473 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 474 if (ret) 475 return ret; 476 477 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 478 } 479 480 struct xrcd_table_entry { 481 struct rb_node node; 482 struct ib_xrcd *xrcd; 483 struct inode *inode; 484 }; 485 486 static int xrcd_table_insert(struct ib_uverbs_device *dev, 487 struct inode *inode, 488 struct ib_xrcd *xrcd) 489 { 490 struct xrcd_table_entry *entry, *scan; 491 struct rb_node **p = &dev->xrcd_tree.rb_node; 492 struct rb_node *parent = NULL; 493 494 entry = kmalloc(sizeof *entry, GFP_KERNEL); 495 if (!entry) 496 return -ENOMEM; 497 498 entry->xrcd = xrcd; 499 entry->inode = inode; 500 501 while (*p) { 502 parent = *p; 503 scan = rb_entry(parent, struct xrcd_table_entry, node); 504 505 if (inode < scan->inode) { 506 p = &(*p)->rb_left; 507 } else if (inode > scan->inode) { 508 p = &(*p)->rb_right; 509 } else { 510 kfree(entry); 511 return -EEXIST; 512 } 513 } 514 515 rb_link_node(&entry->node, parent, p); 516 rb_insert_color(&entry->node, &dev->xrcd_tree); 517 igrab(inode); 518 return 0; 519 } 520 521 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, 522 struct inode *inode) 523 { 524 struct xrcd_table_entry *entry; 525 struct rb_node *p = dev->xrcd_tree.rb_node; 526 527 while (p) { 528 entry = rb_entry(p, struct xrcd_table_entry, node); 529 530 if (inode < entry->inode) 531 p = p->rb_left; 532 else if (inode > entry->inode) 533 p = p->rb_right; 534 else 535 return entry; 536 } 537 538 return NULL; 539 } 540 541 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) 542 { 543 struct xrcd_table_entry *entry; 544 545 entry = xrcd_table_search(dev, inode); 546 if (!entry) 547 return NULL; 548 549 return entry->xrcd; 550 } 551 552 static void xrcd_table_delete(struct ib_uverbs_device *dev, 553 struct inode *inode) 554 { 555 struct xrcd_table_entry *entry; 556 557 entry = xrcd_table_search(dev, inode); 558 if (entry) { 559 iput(inode); 560 rb_erase(&entry->node, &dev->xrcd_tree); 561 kfree(entry); 562 } 563 } 564 565 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs) 566 { 567 struct ib_uverbs_device *ibudev = attrs->ufile->device; 568 struct ib_uverbs_open_xrcd_resp resp = {}; 569 struct ib_uverbs_open_xrcd cmd; 570 struct ib_uxrcd_object *obj; 571 struct ib_xrcd *xrcd = NULL; 572 struct inode *inode = NULL; 573 int new_xrcd = 0; 574 struct ib_device *ib_dev; 575 struct fd f = {}; 576 int ret; 577 578 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 579 if (ret) 580 return ret; 581 582 mutex_lock(&ibudev->xrcd_tree_mutex); 583 584 if (cmd.fd != -1) { 585 /* search for file descriptor */ 586 f = fdget(cmd.fd); 587 if (!f.file) { 588 ret = -EBADF; 589 goto err_tree_mutex_unlock; 590 } 591 592 inode = file_inode(f.file); 593 xrcd = find_xrcd(ibudev, inode); 594 if (!xrcd && !(cmd.oflags & O_CREAT)) { 595 /* no file descriptor. Need CREATE flag */ 596 ret = -EAGAIN; 597 goto err_tree_mutex_unlock; 598 } 599 600 if (xrcd && cmd.oflags & O_EXCL) { 601 ret = -EINVAL; 602 goto err_tree_mutex_unlock; 603 } 604 } 605 606 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs, 607 &ib_dev); 608 if (IS_ERR(obj)) { 609 ret = PTR_ERR(obj); 610 goto err_tree_mutex_unlock; 611 } 612 613 if (!xrcd) { 614 xrcd = ib_alloc_xrcd_user(ib_dev, inode, &attrs->driver_udata); 615 if (IS_ERR(xrcd)) { 616 ret = PTR_ERR(xrcd); 617 goto err; 618 } 619 new_xrcd = 1; 620 } 621 622 atomic_set(&obj->refcnt, 0); 623 obj->uobject.object = xrcd; 624 625 if (inode) { 626 if (new_xrcd) { 627 /* create new inode/xrcd table entry */ 628 ret = xrcd_table_insert(ibudev, inode, xrcd); 629 if (ret) 630 goto err_dealloc_xrcd; 631 } 632 atomic_inc(&xrcd->usecnt); 633 } 634 635 if (f.file) 636 fdput(f); 637 638 mutex_unlock(&ibudev->xrcd_tree_mutex); 639 uobj_finalize_uobj_create(&obj->uobject, attrs); 640 641 resp.xrcd_handle = obj->uobject.id; 642 return uverbs_response(attrs, &resp, sizeof(resp)); 643 644 err_dealloc_xrcd: 645 ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs)); 646 647 err: 648 uobj_alloc_abort(&obj->uobject, attrs); 649 650 err_tree_mutex_unlock: 651 if (f.file) 652 fdput(f); 653 654 mutex_unlock(&ibudev->xrcd_tree_mutex); 655 656 return ret; 657 } 658 659 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) 660 { 661 struct ib_uverbs_close_xrcd cmd; 662 int ret; 663 664 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 665 if (ret) 666 return ret; 667 668 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); 669 } 670 671 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, 672 enum rdma_remove_reason why, 673 struct uverbs_attr_bundle *attrs) 674 { 675 struct inode *inode; 676 int ret; 677 struct ib_uverbs_device *dev = attrs->ufile->device; 678 679 inode = xrcd->inode; 680 if (inode && !atomic_dec_and_test(&xrcd->usecnt)) 681 return 0; 682 683 ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata); 684 685 if (ib_is_destroy_retryable(ret, why, uobject)) { 686 atomic_inc(&xrcd->usecnt); 687 return ret; 688 } 689 690 if (inode) 691 xrcd_table_delete(dev, inode); 692 693 return ret; 694 } 695 696 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) 697 { 698 struct ib_uverbs_reg_mr_resp resp = {}; 699 struct ib_uverbs_reg_mr cmd; 700 struct ib_uobject *uobj; 701 struct ib_pd *pd; 702 struct ib_mr *mr; 703 int ret; 704 struct ib_device *ib_dev; 705 706 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 707 if (ret) 708 return ret; 709 710 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 711 return -EINVAL; 712 713 ret = ib_check_mr_access(cmd.access_flags); 714 if (ret) 715 return ret; 716 717 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 718 if (IS_ERR(uobj)) 719 return PTR_ERR(uobj); 720 721 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 722 if (!pd) { 723 ret = -EINVAL; 724 goto err_free; 725 } 726 727 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) { 728 if (!(pd->device->attrs.device_cap_flags & 729 IB_DEVICE_ON_DEMAND_PAGING)) { 730 pr_debug("ODP support not available\n"); 731 ret = -EINVAL; 732 goto err_put; 733 } 734 } 735 736 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 737 cmd.access_flags, 738 &attrs->driver_udata); 739 if (IS_ERR(mr)) { 740 ret = PTR_ERR(mr); 741 goto err_put; 742 } 743 744 mr->device = pd->device; 745 mr->pd = pd; 746 mr->type = IB_MR_TYPE_USER; 747 mr->dm = NULL; 748 mr->sig_attrs = NULL; 749 mr->uobject = uobj; 750 atomic_inc(&pd->usecnt); 751 mr->iova = cmd.hca_va; 752 753 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 754 rdma_restrack_set_name(&mr->res, NULL); 755 rdma_restrack_add(&mr->res); 756 757 uobj->object = mr; 758 uobj_put_obj_read(pd); 759 uobj_finalize_uobj_create(uobj, attrs); 760 761 resp.lkey = mr->lkey; 762 resp.rkey = mr->rkey; 763 resp.mr_handle = uobj->id; 764 return uverbs_response(attrs, &resp, sizeof(resp)); 765 766 err_put: 767 uobj_put_obj_read(pd); 768 err_free: 769 uobj_alloc_abort(uobj, attrs); 770 return ret; 771 } 772 773 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 774 { 775 struct ib_uverbs_rereg_mr cmd; 776 struct ib_uverbs_rereg_mr_resp resp; 777 struct ib_pd *pd = NULL; 778 struct ib_mr *mr; 779 struct ib_pd *old_pd; 780 int ret; 781 struct ib_uobject *uobj; 782 783 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 784 if (ret) 785 return ret; 786 787 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) 788 return -EINVAL; 789 790 if ((cmd.flags & IB_MR_REREG_TRANS) && 791 (!cmd.start || !cmd.hca_va || 0 >= cmd.length || 792 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) 793 return -EINVAL; 794 795 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 796 if (IS_ERR(uobj)) 797 return PTR_ERR(uobj); 798 799 mr = uobj->object; 800 801 if (mr->dm) { 802 ret = -EINVAL; 803 goto put_uobjs; 804 } 805 806 if (cmd.flags & IB_MR_REREG_ACCESS) { 807 ret = ib_check_mr_access(cmd.access_flags); 808 if (ret) 809 goto put_uobjs; 810 } 811 812 if (cmd.flags & IB_MR_REREG_PD) { 813 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 814 attrs); 815 if (!pd) { 816 ret = -EINVAL; 817 goto put_uobjs; 818 } 819 } 820 821 old_pd = mr->pd; 822 ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start, 823 cmd.length, cmd.hca_va, 824 cmd.access_flags, pd, 825 &attrs->driver_udata); 826 if (ret) 827 goto put_uobj_pd; 828 829 if (cmd.flags & IB_MR_REREG_PD) { 830 atomic_inc(&pd->usecnt); 831 mr->pd = pd; 832 atomic_dec(&old_pd->usecnt); 833 } 834 835 if (cmd.flags & IB_MR_REREG_TRANS) 836 mr->iova = cmd.hca_va; 837 838 memset(&resp, 0, sizeof(resp)); 839 resp.lkey = mr->lkey; 840 resp.rkey = mr->rkey; 841 842 ret = uverbs_response(attrs, &resp, sizeof(resp)); 843 844 put_uobj_pd: 845 if (cmd.flags & IB_MR_REREG_PD) 846 uobj_put_obj_read(pd); 847 848 put_uobjs: 849 uobj_put_write(uobj); 850 851 return ret; 852 } 853 854 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) 855 { 856 struct ib_uverbs_dereg_mr cmd; 857 int ret; 858 859 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 860 if (ret) 861 return ret; 862 863 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 864 } 865 866 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 867 { 868 struct ib_uverbs_alloc_mw cmd; 869 struct ib_uverbs_alloc_mw_resp resp = {}; 870 struct ib_uobject *uobj; 871 struct ib_pd *pd; 872 struct ib_mw *mw; 873 int ret; 874 struct ib_device *ib_dev; 875 876 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 877 if (ret) 878 return ret; 879 880 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 881 if (IS_ERR(uobj)) 882 return PTR_ERR(uobj); 883 884 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 885 if (!pd) { 886 ret = -EINVAL; 887 goto err_free; 888 } 889 890 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 891 ret = -EINVAL; 892 goto err_put; 893 } 894 895 mw = rdma_zalloc_drv_obj(ib_dev, ib_mw); 896 if (!mw) { 897 ret = -ENOMEM; 898 goto err_put; 899 } 900 901 mw->device = ib_dev; 902 mw->pd = pd; 903 mw->uobject = uobj; 904 mw->type = cmd.mw_type; 905 906 ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata); 907 if (ret) 908 goto err_alloc; 909 910 atomic_inc(&pd->usecnt); 911 912 uobj->object = mw; 913 uobj_put_obj_read(pd); 914 uobj_finalize_uobj_create(uobj, attrs); 915 916 resp.rkey = mw->rkey; 917 resp.mw_handle = uobj->id; 918 return uverbs_response(attrs, &resp, sizeof(resp)); 919 920 err_alloc: 921 kfree(mw); 922 err_put: 923 uobj_put_obj_read(pd); 924 err_free: 925 uobj_alloc_abort(uobj, attrs); 926 return ret; 927 } 928 929 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) 930 { 931 struct ib_uverbs_dealloc_mw cmd; 932 int ret; 933 934 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 935 if (ret) 936 return ret; 937 938 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); 939 } 940 941 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) 942 { 943 struct ib_uverbs_create_comp_channel cmd; 944 struct ib_uverbs_create_comp_channel_resp resp; 945 struct ib_uobject *uobj; 946 struct ib_uverbs_completion_event_file *ev_file; 947 struct ib_device *ib_dev; 948 int ret; 949 950 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 951 if (ret) 952 return ret; 953 954 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); 955 if (IS_ERR(uobj)) 956 return PTR_ERR(uobj); 957 958 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, 959 uobj); 960 ib_uverbs_init_event_queue(&ev_file->ev_queue); 961 uobj_finalize_uobj_create(uobj, attrs); 962 963 resp.fd = uobj->id; 964 return uverbs_response(attrs, &resp, sizeof(resp)); 965 } 966 967 static int create_cq(struct uverbs_attr_bundle *attrs, 968 struct ib_uverbs_ex_create_cq *cmd) 969 { 970 struct ib_ucq_object *obj; 971 struct ib_uverbs_completion_event_file *ev_file = NULL; 972 struct ib_cq *cq; 973 int ret; 974 struct ib_uverbs_ex_create_cq_resp resp = {}; 975 struct ib_cq_init_attr attr = {}; 976 struct ib_device *ib_dev; 977 978 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) 979 return -EINVAL; 980 981 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, 982 &ib_dev); 983 if (IS_ERR(obj)) 984 return PTR_ERR(obj); 985 986 if (cmd->comp_channel >= 0) { 987 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); 988 if (IS_ERR(ev_file)) { 989 ret = PTR_ERR(ev_file); 990 goto err; 991 } 992 } 993 994 obj->uevent.uobject.user_handle = cmd->user_handle; 995 INIT_LIST_HEAD(&obj->comp_list); 996 INIT_LIST_HEAD(&obj->uevent.event_list); 997 998 attr.cqe = cmd->cqe; 999 attr.comp_vector = cmd->comp_vector; 1000 attr.flags = cmd->flags; 1001 1002 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 1003 if (!cq) { 1004 ret = -ENOMEM; 1005 goto err_file; 1006 } 1007 cq->device = ib_dev; 1008 cq->uobject = obj; 1009 cq->comp_handler = ib_uverbs_comp_handler; 1010 cq->event_handler = ib_uverbs_cq_event_handler; 1011 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 1012 atomic_set(&cq->usecnt, 0); 1013 1014 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ); 1015 rdma_restrack_set_name(&cq->res, NULL); 1016 1017 ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata); 1018 if (ret) 1019 goto err_free; 1020 rdma_restrack_add(&cq->res); 1021 1022 obj->uevent.uobject.object = cq; 1023 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1024 if (obj->uevent.event_file) 1025 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1026 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1027 1028 resp.base.cq_handle = obj->uevent.uobject.id; 1029 resp.base.cqe = cq->cqe; 1030 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1031 return uverbs_response(attrs, &resp, sizeof(resp)); 1032 1033 err_free: 1034 rdma_restrack_put(&cq->res); 1035 kfree(cq); 1036 err_file: 1037 if (ev_file) 1038 ib_uverbs_release_ucq(ev_file, obj); 1039 err: 1040 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1041 return ret; 1042 } 1043 1044 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) 1045 { 1046 struct ib_uverbs_create_cq cmd; 1047 struct ib_uverbs_ex_create_cq cmd_ex; 1048 int ret; 1049 1050 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1051 if (ret) 1052 return ret; 1053 1054 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1055 cmd_ex.user_handle = cmd.user_handle; 1056 cmd_ex.cqe = cmd.cqe; 1057 cmd_ex.comp_vector = cmd.comp_vector; 1058 cmd_ex.comp_channel = cmd.comp_channel; 1059 1060 return create_cq(attrs, &cmd_ex); 1061 } 1062 1063 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) 1064 { 1065 struct ib_uverbs_ex_create_cq cmd; 1066 int ret; 1067 1068 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1069 if (ret) 1070 return ret; 1071 1072 if (cmd.comp_mask) 1073 return -EINVAL; 1074 1075 if (cmd.reserved) 1076 return -EINVAL; 1077 1078 return create_cq(attrs, &cmd); 1079 } 1080 1081 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) 1082 { 1083 struct ib_uverbs_resize_cq cmd; 1084 struct ib_uverbs_resize_cq_resp resp = {}; 1085 struct ib_cq *cq; 1086 int ret; 1087 1088 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1089 if (ret) 1090 return ret; 1091 1092 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1093 if (!cq) 1094 return -EINVAL; 1095 1096 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); 1097 if (ret) 1098 goto out; 1099 1100 resp.cqe = cq->cqe; 1101 1102 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1103 out: 1104 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1105 UVERBS_LOOKUP_READ); 1106 1107 return ret; 1108 } 1109 1110 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1111 struct ib_wc *wc) 1112 { 1113 struct ib_uverbs_wc tmp; 1114 1115 tmp.wr_id = wc->wr_id; 1116 tmp.status = wc->status; 1117 tmp.opcode = wc->opcode; 1118 tmp.vendor_err = wc->vendor_err; 1119 tmp.byte_len = wc->byte_len; 1120 tmp.ex.imm_data = wc->ex.imm_data; 1121 tmp.qp_num = wc->qp->qp_num; 1122 tmp.src_qp = wc->src_qp; 1123 tmp.wc_flags = wc->wc_flags; 1124 tmp.pkey_index = wc->pkey_index; 1125 if (rdma_cap_opa_ah(ib_dev, wc->port_num)) 1126 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); 1127 else 1128 tmp.slid = ib_lid_cpu16(wc->slid); 1129 tmp.sl = wc->sl; 1130 tmp.dlid_path_bits = wc->dlid_path_bits; 1131 tmp.port_num = wc->port_num; 1132 tmp.reserved = 0; 1133 1134 if (copy_to_user(dest, &tmp, sizeof tmp)) 1135 return -EFAULT; 1136 1137 return 0; 1138 } 1139 1140 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1141 { 1142 struct ib_uverbs_poll_cq cmd; 1143 struct ib_uverbs_poll_cq_resp resp; 1144 u8 __user *header_ptr; 1145 u8 __user *data_ptr; 1146 struct ib_cq *cq; 1147 struct ib_wc wc; 1148 int ret; 1149 1150 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1151 if (ret) 1152 return ret; 1153 1154 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1155 if (!cq) 1156 return -EINVAL; 1157 1158 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1159 header_ptr = attrs->ucore.outbuf; 1160 data_ptr = header_ptr + sizeof resp; 1161 1162 memset(&resp, 0, sizeof resp); 1163 while (resp.count < cmd.ne) { 1164 ret = ib_poll_cq(cq, 1, &wc); 1165 if (ret < 0) 1166 goto out_put; 1167 if (!ret) 1168 break; 1169 1170 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1171 if (ret) 1172 goto out_put; 1173 1174 data_ptr += sizeof(struct ib_uverbs_wc); 1175 ++resp.count; 1176 } 1177 1178 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1179 ret = -EFAULT; 1180 goto out_put; 1181 } 1182 ret = 0; 1183 1184 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1185 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1186 1187 out_put: 1188 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1189 UVERBS_LOOKUP_READ); 1190 return ret; 1191 } 1192 1193 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1194 { 1195 struct ib_uverbs_req_notify_cq cmd; 1196 struct ib_cq *cq; 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 (!cq) 1205 return -EINVAL; 1206 1207 ib_req_notify_cq(cq, cmd.solicited_only ? 1208 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1209 1210 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1211 UVERBS_LOOKUP_READ); 1212 return 0; 1213 } 1214 1215 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1216 { 1217 struct ib_uverbs_destroy_cq cmd; 1218 struct ib_uverbs_destroy_cq_resp resp; 1219 struct ib_uobject *uobj; 1220 struct ib_ucq_object *obj; 1221 int ret; 1222 1223 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1224 if (ret) 1225 return ret; 1226 1227 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1228 if (IS_ERR(uobj)) 1229 return PTR_ERR(uobj); 1230 1231 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject); 1232 memset(&resp, 0, sizeof(resp)); 1233 resp.comp_events_reported = obj->comp_events_reported; 1234 resp.async_events_reported = obj->uevent.events_reported; 1235 1236 uobj_put_destroy(uobj); 1237 1238 return uverbs_response(attrs, &resp, sizeof(resp)); 1239 } 1240 1241 static int create_qp(struct uverbs_attr_bundle *attrs, 1242 struct ib_uverbs_ex_create_qp *cmd) 1243 { 1244 struct ib_uqp_object *obj; 1245 struct ib_device *device; 1246 struct ib_pd *pd = NULL; 1247 struct ib_xrcd *xrcd = NULL; 1248 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1249 struct ib_cq *scq = NULL, *rcq = NULL; 1250 struct ib_srq *srq = NULL; 1251 struct ib_qp *qp; 1252 struct ib_qp_init_attr attr = {}; 1253 struct ib_uverbs_ex_create_qp_resp resp = {}; 1254 int ret; 1255 struct ib_rwq_ind_table *ind_tbl = NULL; 1256 bool has_sq = true; 1257 struct ib_device *ib_dev; 1258 1259 switch (cmd->qp_type) { 1260 case IB_QPT_RAW_PACKET: 1261 if (!capable(CAP_NET_RAW)) 1262 return -EPERM; 1263 break; 1264 case IB_QPT_RC: 1265 case IB_QPT_UC: 1266 case IB_QPT_UD: 1267 case IB_QPT_XRC_INI: 1268 case IB_QPT_XRC_TGT: 1269 case IB_QPT_DRIVER: 1270 break; 1271 default: 1272 return -EINVAL; 1273 } 1274 1275 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1276 &ib_dev); 1277 if (IS_ERR(obj)) 1278 return PTR_ERR(obj); 1279 obj->uxrcd = NULL; 1280 obj->uevent.uobject.user_handle = cmd->user_handle; 1281 mutex_init(&obj->mcast_lock); 1282 1283 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1284 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1285 UVERBS_OBJECT_RWQ_IND_TBL, 1286 cmd->rwq_ind_tbl_handle, attrs); 1287 if (!ind_tbl) { 1288 ret = -EINVAL; 1289 goto err_put; 1290 } 1291 1292 attr.rwq_ind_tbl = ind_tbl; 1293 } 1294 1295 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1296 ret = -EINVAL; 1297 goto err_put; 1298 } 1299 1300 if (ind_tbl && !cmd->max_send_wr) 1301 has_sq = false; 1302 1303 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1304 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1305 attrs); 1306 1307 if (IS_ERR(xrcd_uobj)) { 1308 ret = -EINVAL; 1309 goto err_put; 1310 } 1311 1312 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1313 if (!xrcd) { 1314 ret = -EINVAL; 1315 goto err_put; 1316 } 1317 device = xrcd->device; 1318 } else { 1319 if (cmd->qp_type == IB_QPT_XRC_INI) { 1320 cmd->max_recv_wr = 0; 1321 cmd->max_recv_sge = 0; 1322 } else { 1323 if (cmd->is_srq) { 1324 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1325 cmd->srq_handle, attrs); 1326 if (!srq || srq->srq_type == IB_SRQT_XRC) { 1327 ret = -EINVAL; 1328 goto err_put; 1329 } 1330 } 1331 1332 if (!ind_tbl) { 1333 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1334 rcq = uobj_get_obj_read( 1335 cq, UVERBS_OBJECT_CQ, 1336 cmd->recv_cq_handle, attrs); 1337 if (!rcq) { 1338 ret = -EINVAL; 1339 goto err_put; 1340 } 1341 } 1342 } 1343 } 1344 1345 if (has_sq) 1346 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1347 cmd->send_cq_handle, attrs); 1348 if (!ind_tbl) 1349 rcq = rcq ?: scq; 1350 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1351 attrs); 1352 if (!pd || (!scq && has_sq)) { 1353 ret = -EINVAL; 1354 goto err_put; 1355 } 1356 1357 device = pd->device; 1358 } 1359 1360 attr.event_handler = ib_uverbs_qp_event_handler; 1361 attr.send_cq = scq; 1362 attr.recv_cq = rcq; 1363 attr.srq = srq; 1364 attr.xrcd = xrcd; 1365 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1366 IB_SIGNAL_REQ_WR; 1367 attr.qp_type = cmd->qp_type; 1368 attr.create_flags = 0; 1369 1370 attr.cap.max_send_wr = cmd->max_send_wr; 1371 attr.cap.max_recv_wr = cmd->max_recv_wr; 1372 attr.cap.max_send_sge = cmd->max_send_sge; 1373 attr.cap.max_recv_sge = cmd->max_recv_sge; 1374 attr.cap.max_inline_data = cmd->max_inline_data; 1375 1376 INIT_LIST_HEAD(&obj->uevent.event_list); 1377 INIT_LIST_HEAD(&obj->mcast_list); 1378 1379 attr.create_flags = cmd->create_flags; 1380 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1381 IB_QP_CREATE_CROSS_CHANNEL | 1382 IB_QP_CREATE_MANAGED_SEND | 1383 IB_QP_CREATE_MANAGED_RECV | 1384 IB_QP_CREATE_SCATTER_FCS | 1385 IB_QP_CREATE_CVLAN_STRIPPING | 1386 IB_QP_CREATE_SOURCE_QPN | 1387 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1388 ret = -EINVAL; 1389 goto err_put; 1390 } 1391 1392 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1393 if (!capable(CAP_NET_RAW)) { 1394 ret = -EPERM; 1395 goto err_put; 1396 } 1397 1398 attr.source_qpn = cmd->source_qpn; 1399 } 1400 1401 if (cmd->qp_type == IB_QPT_XRC_TGT) 1402 qp = ib_create_qp(pd, &attr); 1403 else 1404 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata, 1405 obj); 1406 1407 if (IS_ERR(qp)) { 1408 ret = PTR_ERR(qp); 1409 goto err_put; 1410 } 1411 1412 if (cmd->qp_type != IB_QPT_XRC_TGT) { 1413 ret = ib_create_qp_security(qp, device); 1414 if (ret) 1415 goto err_cb; 1416 1417 atomic_inc(&pd->usecnt); 1418 if (attr.send_cq) 1419 atomic_inc(&attr.send_cq->usecnt); 1420 if (attr.recv_cq) 1421 atomic_inc(&attr.recv_cq->usecnt); 1422 if (attr.srq) 1423 atomic_inc(&attr.srq->usecnt); 1424 if (ind_tbl) 1425 atomic_inc(&ind_tbl->usecnt); 1426 } else { 1427 /* It is done in _ib_create_qp for other QP types */ 1428 qp->uobject = obj; 1429 } 1430 1431 obj->uevent.uobject.object = qp; 1432 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1433 if (obj->uevent.event_file) 1434 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1435 1436 if (xrcd) { 1437 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1438 uobject); 1439 atomic_inc(&obj->uxrcd->refcnt); 1440 uobj_put_read(xrcd_uobj); 1441 } 1442 1443 if (pd) 1444 uobj_put_obj_read(pd); 1445 if (scq) 1446 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1447 UVERBS_LOOKUP_READ); 1448 if (rcq && rcq != scq) 1449 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1450 UVERBS_LOOKUP_READ); 1451 if (srq) 1452 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1453 UVERBS_LOOKUP_READ); 1454 if (ind_tbl) 1455 uobj_put_obj_read(ind_tbl); 1456 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1457 1458 resp.base.qpn = qp->qp_num; 1459 resp.base.qp_handle = obj->uevent.uobject.id; 1460 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1461 resp.base.max_send_sge = attr.cap.max_send_sge; 1462 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1463 resp.base.max_send_wr = attr.cap.max_send_wr; 1464 resp.base.max_inline_data = attr.cap.max_inline_data; 1465 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1466 return uverbs_response(attrs, &resp, sizeof(resp)); 1467 1468 err_cb: 1469 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs)); 1470 1471 err_put: 1472 if (!IS_ERR(xrcd_uobj)) 1473 uobj_put_read(xrcd_uobj); 1474 if (pd) 1475 uobj_put_obj_read(pd); 1476 if (scq) 1477 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1478 UVERBS_LOOKUP_READ); 1479 if (rcq && rcq != scq) 1480 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1481 UVERBS_LOOKUP_READ); 1482 if (srq) 1483 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1484 UVERBS_LOOKUP_READ); 1485 if (ind_tbl) 1486 uobj_put_obj_read(ind_tbl); 1487 1488 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1489 return ret; 1490 } 1491 1492 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1493 { 1494 struct ib_uverbs_create_qp cmd; 1495 struct ib_uverbs_ex_create_qp cmd_ex; 1496 int ret; 1497 1498 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1499 if (ret) 1500 return ret; 1501 1502 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1503 cmd_ex.user_handle = cmd.user_handle; 1504 cmd_ex.pd_handle = cmd.pd_handle; 1505 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1506 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1507 cmd_ex.srq_handle = cmd.srq_handle; 1508 cmd_ex.max_send_wr = cmd.max_send_wr; 1509 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1510 cmd_ex.max_send_sge = cmd.max_send_sge; 1511 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1512 cmd_ex.max_inline_data = cmd.max_inline_data; 1513 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1514 cmd_ex.qp_type = cmd.qp_type; 1515 cmd_ex.is_srq = cmd.is_srq; 1516 1517 return create_qp(attrs, &cmd_ex); 1518 } 1519 1520 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1521 { 1522 struct ib_uverbs_ex_create_qp cmd; 1523 int ret; 1524 1525 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1526 if (ret) 1527 return ret; 1528 1529 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1530 return -EINVAL; 1531 1532 if (cmd.reserved) 1533 return -EINVAL; 1534 1535 return create_qp(attrs, &cmd); 1536 } 1537 1538 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1539 { 1540 struct ib_uverbs_create_qp_resp resp = {}; 1541 struct ib_uverbs_open_qp cmd; 1542 struct ib_uqp_object *obj; 1543 struct ib_xrcd *xrcd; 1544 struct ib_qp *qp; 1545 struct ib_qp_open_attr attr = {}; 1546 int ret; 1547 struct ib_uobject *xrcd_uobj; 1548 struct ib_device *ib_dev; 1549 1550 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1551 if (ret) 1552 return ret; 1553 1554 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1555 &ib_dev); 1556 if (IS_ERR(obj)) 1557 return PTR_ERR(obj); 1558 1559 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1560 if (IS_ERR(xrcd_uobj)) { 1561 ret = -EINVAL; 1562 goto err_put; 1563 } 1564 1565 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1566 if (!xrcd) { 1567 ret = -EINVAL; 1568 goto err_xrcd; 1569 } 1570 1571 attr.event_handler = ib_uverbs_qp_event_handler; 1572 attr.qp_num = cmd.qpn; 1573 attr.qp_type = cmd.qp_type; 1574 1575 INIT_LIST_HEAD(&obj->uevent.event_list); 1576 INIT_LIST_HEAD(&obj->mcast_list); 1577 1578 qp = ib_open_qp(xrcd, &attr); 1579 if (IS_ERR(qp)) { 1580 ret = PTR_ERR(qp); 1581 goto err_xrcd; 1582 } 1583 1584 obj->uevent.uobject.object = qp; 1585 obj->uevent.uobject.user_handle = cmd.user_handle; 1586 1587 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1588 atomic_inc(&obj->uxrcd->refcnt); 1589 qp->uobject = obj; 1590 uobj_put_read(xrcd_uobj); 1591 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1592 1593 resp.qpn = qp->qp_num; 1594 resp.qp_handle = obj->uevent.uobject.id; 1595 return uverbs_response(attrs, &resp, sizeof(resp)); 1596 1597 err_xrcd: 1598 uobj_put_read(xrcd_uobj); 1599 err_put: 1600 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1601 return ret; 1602 } 1603 1604 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, 1605 struct rdma_ah_attr *rdma_attr) 1606 { 1607 const struct ib_global_route *grh; 1608 1609 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr); 1610 uverb_attr->sl = rdma_ah_get_sl(rdma_attr); 1611 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr); 1612 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr); 1613 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) & 1614 IB_AH_GRH); 1615 if (uverb_attr->is_global) { 1616 grh = rdma_ah_read_grh(rdma_attr); 1617 memcpy(uverb_attr->dgid, grh->dgid.raw, 16); 1618 uverb_attr->flow_label = grh->flow_label; 1619 uverb_attr->sgid_index = grh->sgid_index; 1620 uverb_attr->hop_limit = grh->hop_limit; 1621 uverb_attr->traffic_class = grh->traffic_class; 1622 } 1623 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr); 1624 } 1625 1626 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) 1627 { 1628 struct ib_uverbs_query_qp cmd; 1629 struct ib_uverbs_query_qp_resp resp; 1630 struct ib_qp *qp; 1631 struct ib_qp_attr *attr; 1632 struct ib_qp_init_attr *init_attr; 1633 int ret; 1634 1635 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1636 if (ret) 1637 return ret; 1638 1639 attr = kmalloc(sizeof *attr, GFP_KERNEL); 1640 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 1641 if (!attr || !init_attr) { 1642 ret = -ENOMEM; 1643 goto out; 1644 } 1645 1646 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1647 if (!qp) { 1648 ret = -EINVAL; 1649 goto out; 1650 } 1651 1652 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1653 1654 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1655 UVERBS_LOOKUP_READ); 1656 1657 if (ret) 1658 goto out; 1659 1660 memset(&resp, 0, sizeof resp); 1661 1662 resp.qp_state = attr->qp_state; 1663 resp.cur_qp_state = attr->cur_qp_state; 1664 resp.path_mtu = attr->path_mtu; 1665 resp.path_mig_state = attr->path_mig_state; 1666 resp.qkey = attr->qkey; 1667 resp.rq_psn = attr->rq_psn; 1668 resp.sq_psn = attr->sq_psn; 1669 resp.dest_qp_num = attr->dest_qp_num; 1670 resp.qp_access_flags = attr->qp_access_flags; 1671 resp.pkey_index = attr->pkey_index; 1672 resp.alt_pkey_index = attr->alt_pkey_index; 1673 resp.sq_draining = attr->sq_draining; 1674 resp.max_rd_atomic = attr->max_rd_atomic; 1675 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1676 resp.min_rnr_timer = attr->min_rnr_timer; 1677 resp.port_num = attr->port_num; 1678 resp.timeout = attr->timeout; 1679 resp.retry_cnt = attr->retry_cnt; 1680 resp.rnr_retry = attr->rnr_retry; 1681 resp.alt_port_num = attr->alt_port_num; 1682 resp.alt_timeout = attr->alt_timeout; 1683 1684 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1685 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1686 1687 resp.max_send_wr = init_attr->cap.max_send_wr; 1688 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1689 resp.max_send_sge = init_attr->cap.max_send_sge; 1690 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1691 resp.max_inline_data = init_attr->cap.max_inline_data; 1692 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1693 1694 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1695 1696 out: 1697 kfree(attr); 1698 kfree(init_attr); 1699 1700 return ret; 1701 } 1702 1703 /* Remove ignored fields set in the attribute mask */ 1704 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1705 { 1706 switch (qp_type) { 1707 case IB_QPT_XRC_INI: 1708 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1709 case IB_QPT_XRC_TGT: 1710 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1711 IB_QP_RNR_RETRY); 1712 default: 1713 return mask; 1714 } 1715 } 1716 1717 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1718 struct rdma_ah_attr *rdma_attr, 1719 struct ib_uverbs_qp_dest *uverb_attr) 1720 { 1721 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); 1722 if (uverb_attr->is_global) { 1723 rdma_ah_set_grh(rdma_attr, NULL, 1724 uverb_attr->flow_label, 1725 uverb_attr->sgid_index, 1726 uverb_attr->hop_limit, 1727 uverb_attr->traffic_class); 1728 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); 1729 } else { 1730 rdma_ah_set_ah_flags(rdma_attr, 0); 1731 } 1732 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); 1733 rdma_ah_set_sl(rdma_attr, uverb_attr->sl); 1734 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); 1735 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); 1736 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); 1737 rdma_ah_set_make_grd(rdma_attr, false); 1738 } 1739 1740 static int modify_qp(struct uverbs_attr_bundle *attrs, 1741 struct ib_uverbs_ex_modify_qp *cmd) 1742 { 1743 struct ib_qp_attr *attr; 1744 struct ib_qp *qp; 1745 int ret; 1746 1747 attr = kzalloc(sizeof(*attr), GFP_KERNEL); 1748 if (!attr) 1749 return -ENOMEM; 1750 1751 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1752 attrs); 1753 if (!qp) { 1754 ret = -EINVAL; 1755 goto out; 1756 } 1757 1758 if ((cmd->base.attr_mask & IB_QP_PORT) && 1759 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1760 ret = -EINVAL; 1761 goto release_qp; 1762 } 1763 1764 if ((cmd->base.attr_mask & IB_QP_AV)) { 1765 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1766 ret = -EINVAL; 1767 goto release_qp; 1768 } 1769 1770 if (cmd->base.attr_mask & IB_QP_STATE && 1771 cmd->base.qp_state == IB_QPS_RTR) { 1772 /* We are in INIT->RTR TRANSITION (if we are not, 1773 * this transition will be rejected in subsequent checks). 1774 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1775 * but the IB_QP_STATE flag is required. 1776 * 1777 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1778 * when IB_QP_AV is set, has required inclusion of a valid 1779 * port number in the primary AV. (AVs are created and handled 1780 * differently for infiniband and ethernet (RoCE) ports). 1781 * 1782 * Check the port number included in the primary AV against 1783 * the port number in the qp struct, which was set (and saved) 1784 * in the RST->INIT transition. 1785 */ 1786 if (cmd->base.dest.port_num != qp->real_qp->port) { 1787 ret = -EINVAL; 1788 goto release_qp; 1789 } 1790 } else { 1791 /* We are in SQD->SQD. (If we are not, this transition will 1792 * be rejected later in the verbs layer checks). 1793 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1794 * together in the SQD->SQD transition. 1795 * 1796 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1797 * verbs layer driver does not track primary port changes 1798 * resulting from path migration. Thus, in SQD, if the primary 1799 * AV is modified, the primary port should also be modified). 1800 * 1801 * Note that in this transition, the IB_QP_STATE flag 1802 * is not allowed. 1803 */ 1804 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1805 == (IB_QP_AV | IB_QP_PORT)) && 1806 cmd->base.port_num != cmd->base.dest.port_num) { 1807 ret = -EINVAL; 1808 goto release_qp; 1809 } 1810 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1811 == IB_QP_AV) { 1812 cmd->base.attr_mask |= IB_QP_PORT; 1813 cmd->base.port_num = cmd->base.dest.port_num; 1814 } 1815 } 1816 } 1817 1818 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1819 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1820 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1821 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1822 ret = -EINVAL; 1823 goto release_qp; 1824 } 1825 1826 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1827 cmd->base.cur_qp_state > IB_QPS_ERR) || 1828 (cmd->base.attr_mask & IB_QP_STATE && 1829 cmd->base.qp_state > IB_QPS_ERR)) { 1830 ret = -EINVAL; 1831 goto release_qp; 1832 } 1833 1834 if (cmd->base.attr_mask & IB_QP_STATE) 1835 attr->qp_state = cmd->base.qp_state; 1836 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1837 attr->cur_qp_state = cmd->base.cur_qp_state; 1838 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1839 attr->path_mtu = cmd->base.path_mtu; 1840 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1841 attr->path_mig_state = cmd->base.path_mig_state; 1842 if (cmd->base.attr_mask & IB_QP_QKEY) 1843 attr->qkey = cmd->base.qkey; 1844 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1845 attr->rq_psn = cmd->base.rq_psn; 1846 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1847 attr->sq_psn = cmd->base.sq_psn; 1848 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1849 attr->dest_qp_num = cmd->base.dest_qp_num; 1850 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1851 attr->qp_access_flags = cmd->base.qp_access_flags; 1852 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1853 attr->pkey_index = cmd->base.pkey_index; 1854 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1855 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1856 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1857 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1858 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1859 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1860 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1861 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1862 if (cmd->base.attr_mask & IB_QP_PORT) 1863 attr->port_num = cmd->base.port_num; 1864 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1865 attr->timeout = cmd->base.timeout; 1866 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1867 attr->retry_cnt = cmd->base.retry_cnt; 1868 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1869 attr->rnr_retry = cmd->base.rnr_retry; 1870 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1871 attr->alt_port_num = cmd->base.alt_port_num; 1872 attr->alt_timeout = cmd->base.alt_timeout; 1873 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1874 } 1875 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1876 attr->rate_limit = cmd->rate_limit; 1877 1878 if (cmd->base.attr_mask & IB_QP_AV) 1879 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1880 &cmd->base.dest); 1881 1882 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1883 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1884 &cmd->base.alt_dest); 1885 1886 ret = ib_modify_qp_with_udata(qp, attr, 1887 modify_qp_mask(qp->qp_type, 1888 cmd->base.attr_mask), 1889 &attrs->driver_udata); 1890 1891 release_qp: 1892 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1893 UVERBS_LOOKUP_READ); 1894 out: 1895 kfree(attr); 1896 1897 return ret; 1898 } 1899 1900 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1901 { 1902 struct ib_uverbs_ex_modify_qp cmd; 1903 int ret; 1904 1905 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1906 if (ret) 1907 return ret; 1908 1909 if (cmd.base.attr_mask & 1910 ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1)) 1911 return -EOPNOTSUPP; 1912 1913 return modify_qp(attrs, &cmd); 1914 } 1915 1916 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1917 { 1918 struct ib_uverbs_ex_modify_qp cmd; 1919 struct ib_uverbs_ex_modify_qp_resp resp = { 1920 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1921 }; 1922 int ret; 1923 1924 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1925 if (ret) 1926 return ret; 1927 1928 /* 1929 * Last bit is reserved for extending the attr_mask by 1930 * using another field. 1931 */ 1932 BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1ULL << 31)); 1933 1934 if (cmd.base.attr_mask & 1935 ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1)) 1936 return -EOPNOTSUPP; 1937 1938 ret = modify_qp(attrs, &cmd); 1939 if (ret) 1940 return ret; 1941 1942 return uverbs_response(attrs, &resp, sizeof(resp)); 1943 } 1944 1945 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1946 { 1947 struct ib_uverbs_destroy_qp cmd; 1948 struct ib_uverbs_destroy_qp_resp resp; 1949 struct ib_uobject *uobj; 1950 struct ib_uqp_object *obj; 1951 int ret; 1952 1953 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1954 if (ret) 1955 return ret; 1956 1957 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1958 if (IS_ERR(uobj)) 1959 return PTR_ERR(uobj); 1960 1961 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1962 memset(&resp, 0, sizeof(resp)); 1963 resp.events_reported = obj->uevent.events_reported; 1964 1965 uobj_put_destroy(uobj); 1966 1967 return uverbs_response(attrs, &resp, sizeof(resp)); 1968 } 1969 1970 static void *alloc_wr(size_t wr_size, __u32 num_sge) 1971 { 1972 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) / 1973 sizeof (struct ib_sge)) 1974 return NULL; 1975 1976 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) + 1977 num_sge * sizeof (struct ib_sge), GFP_KERNEL); 1978 } 1979 1980 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 1981 { 1982 struct ib_uverbs_post_send cmd; 1983 struct ib_uverbs_post_send_resp resp; 1984 struct ib_uverbs_send_wr *user_wr; 1985 struct ib_send_wr *wr = NULL, *last, *next; 1986 const struct ib_send_wr *bad_wr; 1987 struct ib_qp *qp; 1988 int i, sg_ind; 1989 int is_ud; 1990 int ret, ret2; 1991 size_t next_size; 1992 const struct ib_sge __user *sgls; 1993 const void __user *wqes; 1994 struct uverbs_req_iter iter; 1995 1996 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 1997 if (ret) 1998 return ret; 1999 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count); 2000 if (IS_ERR(wqes)) 2001 return PTR_ERR(wqes); 2002 sgls = uverbs_request_next_ptr( 2003 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge)); 2004 if (IS_ERR(sgls)) 2005 return PTR_ERR(sgls); 2006 ret = uverbs_request_finish(&iter); 2007 if (ret) 2008 return ret; 2009 2010 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2011 if (!user_wr) 2012 return -ENOMEM; 2013 2014 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2015 if (!qp) { 2016 ret = -EINVAL; 2017 goto out; 2018 } 2019 2020 is_ud = qp->qp_type == IB_QPT_UD; 2021 sg_ind = 0; 2022 last = NULL; 2023 for (i = 0; i < cmd.wr_count; ++i) { 2024 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2025 cmd.wqe_size)) { 2026 ret = -EFAULT; 2027 goto out_put; 2028 } 2029 2030 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2031 ret = -EINVAL; 2032 goto out_put; 2033 } 2034 2035 if (is_ud) { 2036 struct ib_ud_wr *ud; 2037 2038 if (user_wr->opcode != IB_WR_SEND && 2039 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2040 ret = -EINVAL; 2041 goto out_put; 2042 } 2043 2044 next_size = sizeof(*ud); 2045 ud = alloc_wr(next_size, user_wr->num_sge); 2046 if (!ud) { 2047 ret = -ENOMEM; 2048 goto out_put; 2049 } 2050 2051 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2052 user_wr->wr.ud.ah, attrs); 2053 if (!ud->ah) { 2054 kfree(ud); 2055 ret = -EINVAL; 2056 goto out_put; 2057 } 2058 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2059 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2060 2061 next = &ud->wr; 2062 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2063 user_wr->opcode == IB_WR_RDMA_WRITE || 2064 user_wr->opcode == IB_WR_RDMA_READ) { 2065 struct ib_rdma_wr *rdma; 2066 2067 next_size = sizeof(*rdma); 2068 rdma = alloc_wr(next_size, user_wr->num_sge); 2069 if (!rdma) { 2070 ret = -ENOMEM; 2071 goto out_put; 2072 } 2073 2074 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2075 rdma->rkey = user_wr->wr.rdma.rkey; 2076 2077 next = &rdma->wr; 2078 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2079 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2080 struct ib_atomic_wr *atomic; 2081 2082 next_size = sizeof(*atomic); 2083 atomic = alloc_wr(next_size, user_wr->num_sge); 2084 if (!atomic) { 2085 ret = -ENOMEM; 2086 goto out_put; 2087 } 2088 2089 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2090 atomic->compare_add = user_wr->wr.atomic.compare_add; 2091 atomic->swap = user_wr->wr.atomic.swap; 2092 atomic->rkey = user_wr->wr.atomic.rkey; 2093 2094 next = &atomic->wr; 2095 } else if (user_wr->opcode == IB_WR_SEND || 2096 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2097 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2098 next_size = sizeof(*next); 2099 next = alloc_wr(next_size, user_wr->num_sge); 2100 if (!next) { 2101 ret = -ENOMEM; 2102 goto out_put; 2103 } 2104 } else { 2105 ret = -EINVAL; 2106 goto out_put; 2107 } 2108 2109 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2110 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2111 next->ex.imm_data = 2112 (__be32 __force) user_wr->ex.imm_data; 2113 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2114 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2115 } 2116 2117 if (!last) 2118 wr = next; 2119 else 2120 last->next = next; 2121 last = next; 2122 2123 next->next = NULL; 2124 next->wr_id = user_wr->wr_id; 2125 next->num_sge = user_wr->num_sge; 2126 next->opcode = user_wr->opcode; 2127 next->send_flags = user_wr->send_flags; 2128 2129 if (next->num_sge) { 2130 next->sg_list = (void *) next + 2131 ALIGN(next_size, sizeof(struct ib_sge)); 2132 if (copy_from_user(next->sg_list, sgls + sg_ind, 2133 next->num_sge * 2134 sizeof(struct ib_sge))) { 2135 ret = -EFAULT; 2136 goto out_put; 2137 } 2138 sg_ind += next->num_sge; 2139 } else 2140 next->sg_list = NULL; 2141 } 2142 2143 resp.bad_wr = 0; 2144 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2145 if (ret) 2146 for (next = wr; next; next = next->next) { 2147 ++resp.bad_wr; 2148 if (next == bad_wr) 2149 break; 2150 } 2151 2152 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2153 if (ret2) 2154 ret = ret2; 2155 2156 out_put: 2157 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2158 UVERBS_LOOKUP_READ); 2159 2160 while (wr) { 2161 if (is_ud && ud_wr(wr)->ah) 2162 uobj_put_obj_read(ud_wr(wr)->ah); 2163 next = wr->next; 2164 kfree(wr); 2165 wr = next; 2166 } 2167 2168 out: 2169 kfree(user_wr); 2170 2171 return ret; 2172 } 2173 2174 static struct ib_recv_wr * 2175 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2176 u32 wqe_size, u32 sge_count) 2177 { 2178 struct ib_uverbs_recv_wr *user_wr; 2179 struct ib_recv_wr *wr = NULL, *last, *next; 2180 int sg_ind; 2181 int i; 2182 int ret; 2183 const struct ib_sge __user *sgls; 2184 const void __user *wqes; 2185 2186 if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) 2187 return ERR_PTR(-EINVAL); 2188 2189 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count); 2190 if (IS_ERR(wqes)) 2191 return ERR_CAST(wqes); 2192 sgls = uverbs_request_next_ptr( 2193 iter, sge_count * sizeof(struct ib_uverbs_sge)); 2194 if (IS_ERR(sgls)) 2195 return ERR_CAST(sgls); 2196 ret = uverbs_request_finish(iter); 2197 if (ret) 2198 return ERR_PTR(ret); 2199 2200 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2201 if (!user_wr) 2202 return ERR_PTR(-ENOMEM); 2203 2204 sg_ind = 0; 2205 last = NULL; 2206 for (i = 0; i < wr_count; ++i) { 2207 if (copy_from_user(user_wr, wqes + i * wqe_size, 2208 wqe_size)) { 2209 ret = -EFAULT; 2210 goto err; 2211 } 2212 2213 if (user_wr->num_sge + sg_ind > sge_count) { 2214 ret = -EINVAL; 2215 goto err; 2216 } 2217 2218 if (user_wr->num_sge >= 2219 (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) / 2220 sizeof (struct ib_sge)) { 2221 ret = -EINVAL; 2222 goto err; 2223 } 2224 2225 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + 2226 user_wr->num_sge * sizeof (struct ib_sge), 2227 GFP_KERNEL); 2228 if (!next) { 2229 ret = -ENOMEM; 2230 goto err; 2231 } 2232 2233 if (!last) 2234 wr = next; 2235 else 2236 last->next = next; 2237 last = next; 2238 2239 next->next = NULL; 2240 next->wr_id = user_wr->wr_id; 2241 next->num_sge = user_wr->num_sge; 2242 2243 if (next->num_sge) { 2244 next->sg_list = (void *) next + 2245 ALIGN(sizeof *next, sizeof (struct ib_sge)); 2246 if (copy_from_user(next->sg_list, sgls + sg_ind, 2247 next->num_sge * 2248 sizeof(struct ib_sge))) { 2249 ret = -EFAULT; 2250 goto err; 2251 } 2252 sg_ind += next->num_sge; 2253 } else 2254 next->sg_list = NULL; 2255 } 2256 2257 kfree(user_wr); 2258 return wr; 2259 2260 err: 2261 kfree(user_wr); 2262 2263 while (wr) { 2264 next = wr->next; 2265 kfree(wr); 2266 wr = next; 2267 } 2268 2269 return ERR_PTR(ret); 2270 } 2271 2272 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2273 { 2274 struct ib_uverbs_post_recv cmd; 2275 struct ib_uverbs_post_recv_resp resp; 2276 struct ib_recv_wr *wr, *next; 2277 const struct ib_recv_wr *bad_wr; 2278 struct ib_qp *qp; 2279 int ret, ret2; 2280 struct uverbs_req_iter iter; 2281 2282 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2283 if (ret) 2284 return ret; 2285 2286 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2287 cmd.sge_count); 2288 if (IS_ERR(wr)) 2289 return PTR_ERR(wr); 2290 2291 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2292 if (!qp) { 2293 ret = -EINVAL; 2294 goto out; 2295 } 2296 2297 resp.bad_wr = 0; 2298 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2299 2300 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2301 UVERBS_LOOKUP_READ); 2302 if (ret) { 2303 for (next = wr; next; next = next->next) { 2304 ++resp.bad_wr; 2305 if (next == bad_wr) 2306 break; 2307 } 2308 } 2309 2310 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2311 if (ret2) 2312 ret = ret2; 2313 out: 2314 while (wr) { 2315 next = wr->next; 2316 kfree(wr); 2317 wr = next; 2318 } 2319 2320 return ret; 2321 } 2322 2323 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2324 { 2325 struct ib_uverbs_post_srq_recv cmd; 2326 struct ib_uverbs_post_srq_recv_resp resp; 2327 struct ib_recv_wr *wr, *next; 2328 const struct ib_recv_wr *bad_wr; 2329 struct ib_srq *srq; 2330 int ret, ret2; 2331 struct uverbs_req_iter iter; 2332 2333 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2334 if (ret) 2335 return ret; 2336 2337 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2338 cmd.sge_count); 2339 if (IS_ERR(wr)) 2340 return PTR_ERR(wr); 2341 2342 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2343 if (!srq) { 2344 ret = -EINVAL; 2345 goto out; 2346 } 2347 2348 resp.bad_wr = 0; 2349 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2350 2351 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 2352 UVERBS_LOOKUP_READ); 2353 2354 if (ret) 2355 for (next = wr; next; next = next->next) { 2356 ++resp.bad_wr; 2357 if (next == bad_wr) 2358 break; 2359 } 2360 2361 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2362 if (ret2) 2363 ret = ret2; 2364 2365 out: 2366 while (wr) { 2367 next = wr->next; 2368 kfree(wr); 2369 wr = next; 2370 } 2371 2372 return ret; 2373 } 2374 2375 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2376 { 2377 struct ib_uverbs_create_ah cmd; 2378 struct ib_uverbs_create_ah_resp resp; 2379 struct ib_uobject *uobj; 2380 struct ib_pd *pd; 2381 struct ib_ah *ah; 2382 struct rdma_ah_attr attr = {}; 2383 int ret; 2384 struct ib_device *ib_dev; 2385 2386 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2387 if (ret) 2388 return ret; 2389 2390 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2391 if (IS_ERR(uobj)) 2392 return PTR_ERR(uobj); 2393 2394 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2395 ret = -EINVAL; 2396 goto err; 2397 } 2398 2399 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2400 if (!pd) { 2401 ret = -EINVAL; 2402 goto err; 2403 } 2404 2405 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2406 rdma_ah_set_make_grd(&attr, false); 2407 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2408 rdma_ah_set_sl(&attr, cmd.attr.sl); 2409 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2410 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2411 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2412 2413 if (cmd.attr.is_global) { 2414 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2415 cmd.attr.grh.sgid_index, 2416 cmd.attr.grh.hop_limit, 2417 cmd.attr.grh.traffic_class); 2418 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2419 } else { 2420 rdma_ah_set_ah_flags(&attr, 0); 2421 } 2422 2423 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2424 if (IS_ERR(ah)) { 2425 ret = PTR_ERR(ah); 2426 goto err_put; 2427 } 2428 2429 ah->uobject = uobj; 2430 uobj->user_handle = cmd.user_handle; 2431 uobj->object = ah; 2432 uobj_put_obj_read(pd); 2433 uobj_finalize_uobj_create(uobj, attrs); 2434 2435 resp.ah_handle = uobj->id; 2436 return uverbs_response(attrs, &resp, sizeof(resp)); 2437 2438 err_put: 2439 uobj_put_obj_read(pd); 2440 err: 2441 uobj_alloc_abort(uobj, attrs); 2442 return ret; 2443 } 2444 2445 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2446 { 2447 struct ib_uverbs_destroy_ah cmd; 2448 int ret; 2449 2450 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2451 if (ret) 2452 return ret; 2453 2454 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2455 } 2456 2457 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2458 { 2459 struct ib_uverbs_attach_mcast cmd; 2460 struct ib_qp *qp; 2461 struct ib_uqp_object *obj; 2462 struct ib_uverbs_mcast_entry *mcast; 2463 int ret; 2464 2465 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2466 if (ret) 2467 return ret; 2468 2469 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2470 if (!qp) 2471 return -EINVAL; 2472 2473 obj = qp->uobject; 2474 2475 mutex_lock(&obj->mcast_lock); 2476 list_for_each_entry(mcast, &obj->mcast_list, list) 2477 if (cmd.mlid == mcast->lid && 2478 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2479 ret = 0; 2480 goto out_put; 2481 } 2482 2483 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2484 if (!mcast) { 2485 ret = -ENOMEM; 2486 goto out_put; 2487 } 2488 2489 mcast->lid = cmd.mlid; 2490 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2491 2492 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2493 if (!ret) 2494 list_add_tail(&mcast->list, &obj->mcast_list); 2495 else 2496 kfree(mcast); 2497 2498 out_put: 2499 mutex_unlock(&obj->mcast_lock); 2500 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2501 UVERBS_LOOKUP_READ); 2502 2503 return ret; 2504 } 2505 2506 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2507 { 2508 struct ib_uverbs_detach_mcast cmd; 2509 struct ib_uqp_object *obj; 2510 struct ib_qp *qp; 2511 struct ib_uverbs_mcast_entry *mcast; 2512 int ret; 2513 bool found = false; 2514 2515 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2516 if (ret) 2517 return ret; 2518 2519 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2520 if (!qp) 2521 return -EINVAL; 2522 2523 obj = qp->uobject; 2524 mutex_lock(&obj->mcast_lock); 2525 2526 list_for_each_entry(mcast, &obj->mcast_list, list) 2527 if (cmd.mlid == mcast->lid && 2528 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2529 list_del(&mcast->list); 2530 kfree(mcast); 2531 found = true; 2532 break; 2533 } 2534 2535 if (!found) { 2536 ret = -EINVAL; 2537 goto out_put; 2538 } 2539 2540 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2541 2542 out_put: 2543 mutex_unlock(&obj->mcast_lock); 2544 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2545 UVERBS_LOOKUP_READ); 2546 return ret; 2547 } 2548 2549 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2550 { 2551 struct ib_uflow_resources *resources; 2552 2553 resources = kzalloc(sizeof(*resources), GFP_KERNEL); 2554 2555 if (!resources) 2556 return NULL; 2557 2558 if (!num_specs) 2559 goto out; 2560 2561 resources->counters = 2562 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); 2563 resources->collection = 2564 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); 2565 2566 if (!resources->counters || !resources->collection) 2567 goto err; 2568 2569 out: 2570 resources->max = num_specs; 2571 return resources; 2572 2573 err: 2574 kfree(resources->counters); 2575 kfree(resources); 2576 2577 return NULL; 2578 } 2579 EXPORT_SYMBOL(flow_resources_alloc); 2580 2581 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2582 { 2583 unsigned int i; 2584 2585 if (!uflow_res) 2586 return; 2587 2588 for (i = 0; i < uflow_res->collection_num; i++) 2589 atomic_dec(&uflow_res->collection[i]->usecnt); 2590 2591 for (i = 0; i < uflow_res->counters_num; i++) 2592 atomic_dec(&uflow_res->counters[i]->usecnt); 2593 2594 kfree(uflow_res->collection); 2595 kfree(uflow_res->counters); 2596 kfree(uflow_res); 2597 } 2598 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2599 2600 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2601 enum ib_flow_spec_type type, 2602 void *ibobj) 2603 { 2604 WARN_ON(uflow_res->num >= uflow_res->max); 2605 2606 switch (type) { 2607 case IB_FLOW_SPEC_ACTION_HANDLE: 2608 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2609 uflow_res->collection[uflow_res->collection_num++] = 2610 (struct ib_flow_action *)ibobj; 2611 break; 2612 case IB_FLOW_SPEC_ACTION_COUNT: 2613 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2614 uflow_res->counters[uflow_res->counters_num++] = 2615 (struct ib_counters *)ibobj; 2616 break; 2617 default: 2618 WARN_ON(1); 2619 } 2620 2621 uflow_res->num++; 2622 } 2623 EXPORT_SYMBOL(flow_resources_add); 2624 2625 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2626 struct ib_uverbs_flow_spec *kern_spec, 2627 union ib_flow_spec *ib_spec, 2628 struct ib_uflow_resources *uflow_res) 2629 { 2630 ib_spec->type = kern_spec->type; 2631 switch (ib_spec->type) { 2632 case IB_FLOW_SPEC_ACTION_TAG: 2633 if (kern_spec->flow_tag.size != 2634 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2635 return -EINVAL; 2636 2637 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2638 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2639 break; 2640 case IB_FLOW_SPEC_ACTION_DROP: 2641 if (kern_spec->drop.size != 2642 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2643 return -EINVAL; 2644 2645 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2646 break; 2647 case IB_FLOW_SPEC_ACTION_HANDLE: 2648 if (kern_spec->action.size != 2649 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2650 return -EOPNOTSUPP; 2651 ib_spec->action.act = uobj_get_obj_read(flow_action, 2652 UVERBS_OBJECT_FLOW_ACTION, 2653 kern_spec->action.handle, 2654 attrs); 2655 if (!ib_spec->action.act) 2656 return -EINVAL; 2657 ib_spec->action.size = 2658 sizeof(struct ib_flow_spec_action_handle); 2659 flow_resources_add(uflow_res, 2660 IB_FLOW_SPEC_ACTION_HANDLE, 2661 ib_spec->action.act); 2662 uobj_put_obj_read(ib_spec->action.act); 2663 break; 2664 case IB_FLOW_SPEC_ACTION_COUNT: 2665 if (kern_spec->flow_count.size != 2666 sizeof(struct ib_uverbs_flow_spec_action_count)) 2667 return -EINVAL; 2668 ib_spec->flow_count.counters = 2669 uobj_get_obj_read(counters, 2670 UVERBS_OBJECT_COUNTERS, 2671 kern_spec->flow_count.handle, 2672 attrs); 2673 if (!ib_spec->flow_count.counters) 2674 return -EINVAL; 2675 ib_spec->flow_count.size = 2676 sizeof(struct ib_flow_spec_action_count); 2677 flow_resources_add(uflow_res, 2678 IB_FLOW_SPEC_ACTION_COUNT, 2679 ib_spec->flow_count.counters); 2680 uobj_put_obj_read(ib_spec->flow_count.counters); 2681 break; 2682 default: 2683 return -EINVAL; 2684 } 2685 return 0; 2686 } 2687 2688 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2689 u16 ib_real_filter_sz) 2690 { 2691 /* 2692 * User space filter structures must be 64 bit aligned, otherwise this 2693 * may pass, but we won't handle additional new attributes. 2694 */ 2695 2696 if (kern_filter_size > ib_real_filter_sz) { 2697 if (memchr_inv(kern_spec_filter + 2698 ib_real_filter_sz, 0, 2699 kern_filter_size - ib_real_filter_sz)) 2700 return -EINVAL; 2701 return ib_real_filter_sz; 2702 } 2703 return kern_filter_size; 2704 } 2705 2706 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2707 const void *kern_spec_mask, 2708 const void *kern_spec_val, 2709 size_t kern_filter_sz, 2710 union ib_flow_spec *ib_spec) 2711 { 2712 ssize_t actual_filter_sz; 2713 ssize_t ib_filter_sz; 2714 2715 /* User flow spec size must be aligned to 4 bytes */ 2716 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2717 return -EINVAL; 2718 2719 ib_spec->type = type; 2720 2721 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2722 return -EINVAL; 2723 2724 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2725 case IB_FLOW_SPEC_ETH: 2726 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz); 2727 actual_filter_sz = spec_filter_size(kern_spec_mask, 2728 kern_filter_sz, 2729 ib_filter_sz); 2730 if (actual_filter_sz <= 0) 2731 return -EINVAL; 2732 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2733 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2734 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2735 break; 2736 case IB_FLOW_SPEC_IPV4: 2737 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz); 2738 actual_filter_sz = spec_filter_size(kern_spec_mask, 2739 kern_filter_sz, 2740 ib_filter_sz); 2741 if (actual_filter_sz <= 0) 2742 return -EINVAL; 2743 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2744 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2745 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2746 break; 2747 case IB_FLOW_SPEC_IPV6: 2748 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz); 2749 actual_filter_sz = spec_filter_size(kern_spec_mask, 2750 kern_filter_sz, 2751 ib_filter_sz); 2752 if (actual_filter_sz <= 0) 2753 return -EINVAL; 2754 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2755 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2756 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2757 2758 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2759 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2760 return -EINVAL; 2761 break; 2762 case IB_FLOW_SPEC_TCP: 2763 case IB_FLOW_SPEC_UDP: 2764 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz); 2765 actual_filter_sz = spec_filter_size(kern_spec_mask, 2766 kern_filter_sz, 2767 ib_filter_sz); 2768 if (actual_filter_sz <= 0) 2769 return -EINVAL; 2770 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2771 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2772 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2773 break; 2774 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2775 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz); 2776 actual_filter_sz = spec_filter_size(kern_spec_mask, 2777 kern_filter_sz, 2778 ib_filter_sz); 2779 if (actual_filter_sz <= 0) 2780 return -EINVAL; 2781 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2782 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2783 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2784 2785 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2786 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2787 return -EINVAL; 2788 break; 2789 case IB_FLOW_SPEC_ESP: 2790 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz); 2791 actual_filter_sz = spec_filter_size(kern_spec_mask, 2792 kern_filter_sz, 2793 ib_filter_sz); 2794 if (actual_filter_sz <= 0) 2795 return -EINVAL; 2796 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2797 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2798 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2799 break; 2800 case IB_FLOW_SPEC_GRE: 2801 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz); 2802 actual_filter_sz = spec_filter_size(kern_spec_mask, 2803 kern_filter_sz, 2804 ib_filter_sz); 2805 if (actual_filter_sz <= 0) 2806 return -EINVAL; 2807 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2808 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2809 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2810 break; 2811 case IB_FLOW_SPEC_MPLS: 2812 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz); 2813 actual_filter_sz = spec_filter_size(kern_spec_mask, 2814 kern_filter_sz, 2815 ib_filter_sz); 2816 if (actual_filter_sz <= 0) 2817 return -EINVAL; 2818 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2819 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2820 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2821 break; 2822 default: 2823 return -EINVAL; 2824 } 2825 return 0; 2826 } 2827 2828 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2829 union ib_flow_spec *ib_spec) 2830 { 2831 size_t kern_filter_sz; 2832 void *kern_spec_mask; 2833 void *kern_spec_val; 2834 2835 if (check_sub_overflow((size_t)kern_spec->hdr.size, 2836 sizeof(struct ib_uverbs_flow_spec_hdr), 2837 &kern_filter_sz)) 2838 return -EINVAL; 2839 2840 kern_filter_sz /= 2; 2841 2842 kern_spec_val = (void *)kern_spec + 2843 sizeof(struct ib_uverbs_flow_spec_hdr); 2844 kern_spec_mask = kern_spec_val + kern_filter_sz; 2845 2846 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2847 kern_spec_mask, 2848 kern_spec_val, 2849 kern_filter_sz, ib_spec); 2850 } 2851 2852 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2853 struct ib_uverbs_flow_spec *kern_spec, 2854 union ib_flow_spec *ib_spec, 2855 struct ib_uflow_resources *uflow_res) 2856 { 2857 if (kern_spec->reserved) 2858 return -EINVAL; 2859 2860 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2861 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2862 uflow_res); 2863 else 2864 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2865 } 2866 2867 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2868 { 2869 struct ib_uverbs_ex_create_wq cmd; 2870 struct ib_uverbs_ex_create_wq_resp resp = {}; 2871 struct ib_uwq_object *obj; 2872 int err = 0; 2873 struct ib_cq *cq; 2874 struct ib_pd *pd; 2875 struct ib_wq *wq; 2876 struct ib_wq_init_attr wq_init_attr = {}; 2877 struct ib_device *ib_dev; 2878 2879 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2880 if (err) 2881 return err; 2882 2883 if (cmd.comp_mask) 2884 return -EOPNOTSUPP; 2885 2886 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2887 &ib_dev); 2888 if (IS_ERR(obj)) 2889 return PTR_ERR(obj); 2890 2891 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2892 if (!pd) { 2893 err = -EINVAL; 2894 goto err_uobj; 2895 } 2896 2897 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2898 if (!cq) { 2899 err = -EINVAL; 2900 goto err_put_pd; 2901 } 2902 2903 wq_init_attr.cq = cq; 2904 wq_init_attr.max_sge = cmd.max_sge; 2905 wq_init_attr.max_wr = cmd.max_wr; 2906 wq_init_attr.wq_type = cmd.wq_type; 2907 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2908 wq_init_attr.create_flags = cmd.create_flags; 2909 INIT_LIST_HEAD(&obj->uevent.event_list); 2910 obj->uevent.uobject.user_handle = cmd.user_handle; 2911 2912 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2913 if (IS_ERR(wq)) { 2914 err = PTR_ERR(wq); 2915 goto err_put_cq; 2916 } 2917 2918 wq->uobject = obj; 2919 obj->uevent.uobject.object = wq; 2920 wq->wq_type = wq_init_attr.wq_type; 2921 wq->cq = cq; 2922 wq->pd = pd; 2923 wq->device = pd->device; 2924 atomic_set(&wq->usecnt, 0); 2925 atomic_inc(&pd->usecnt); 2926 atomic_inc(&cq->usecnt); 2927 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 2928 if (obj->uevent.event_file) 2929 uverbs_uobject_get(&obj->uevent.event_file->uobj); 2930 2931 uobj_put_obj_read(pd); 2932 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2933 UVERBS_LOOKUP_READ); 2934 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 2935 2936 resp.wq_handle = obj->uevent.uobject.id; 2937 resp.max_sge = wq_init_attr.max_sge; 2938 resp.max_wr = wq_init_attr.max_wr; 2939 resp.wqn = wq->wq_num; 2940 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2941 return uverbs_response(attrs, &resp, sizeof(resp)); 2942 2943 err_put_cq: 2944 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2945 UVERBS_LOOKUP_READ); 2946 err_put_pd: 2947 uobj_put_obj_read(pd); 2948 err_uobj: 2949 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2950 2951 return err; 2952 } 2953 2954 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2955 { 2956 struct ib_uverbs_ex_destroy_wq cmd; 2957 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 2958 struct ib_uobject *uobj; 2959 struct ib_uwq_object *obj; 2960 int ret; 2961 2962 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2963 if (ret) 2964 return ret; 2965 2966 if (cmd.comp_mask) 2967 return -EOPNOTSUPP; 2968 2969 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2970 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 2971 if (IS_ERR(uobj)) 2972 return PTR_ERR(uobj); 2973 2974 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 2975 resp.events_reported = obj->uevent.events_reported; 2976 2977 uobj_put_destroy(uobj); 2978 2979 return uverbs_response(attrs, &resp, sizeof(resp)); 2980 } 2981 2982 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 2983 { 2984 struct ib_uverbs_ex_modify_wq cmd; 2985 struct ib_wq *wq; 2986 struct ib_wq_attr wq_attr = {}; 2987 int ret; 2988 2989 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2990 if (ret) 2991 return ret; 2992 2993 if (!cmd.attr_mask) 2994 return -EINVAL; 2995 2996 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 2997 return -EINVAL; 2998 2999 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3000 if (!wq) 3001 return -EINVAL; 3002 3003 wq_attr.curr_wq_state = cmd.curr_wq_state; 3004 wq_attr.wq_state = cmd.wq_state; 3005 if (cmd.attr_mask & IB_WQ_FLAGS) { 3006 wq_attr.flags = cmd.flags; 3007 wq_attr.flags_mask = cmd.flags_mask; 3008 } 3009 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3010 &attrs->driver_udata); 3011 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, 3012 UVERBS_LOOKUP_READ); 3013 return ret; 3014 } 3015 3016 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3017 { 3018 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3019 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3020 struct ib_uobject *uobj; 3021 int err; 3022 struct ib_rwq_ind_table_init_attr init_attr = {}; 3023 struct ib_rwq_ind_table *rwq_ind_tbl; 3024 struct ib_wq **wqs = NULL; 3025 u32 *wqs_handles = NULL; 3026 struct ib_wq *wq = NULL; 3027 int i, num_read_wqs; 3028 u32 num_wq_handles; 3029 struct uverbs_req_iter iter; 3030 struct ib_device *ib_dev; 3031 3032 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3033 if (err) 3034 return err; 3035 3036 if (cmd.comp_mask) 3037 return -EOPNOTSUPP; 3038 3039 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3040 return -EINVAL; 3041 3042 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3043 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3044 GFP_KERNEL); 3045 if (!wqs_handles) 3046 return -ENOMEM; 3047 3048 err = uverbs_request_next(&iter, wqs_handles, 3049 num_wq_handles * sizeof(__u32)); 3050 if (err) 3051 goto err_free; 3052 3053 err = uverbs_request_finish(&iter); 3054 if (err) 3055 goto err_free; 3056 3057 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); 3058 if (!wqs) { 3059 err = -ENOMEM; 3060 goto err_free; 3061 } 3062 3063 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3064 num_read_wqs++) { 3065 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3066 wqs_handles[num_read_wqs], attrs); 3067 if (!wq) { 3068 err = -EINVAL; 3069 goto put_wqs; 3070 } 3071 3072 wqs[num_read_wqs] = wq; 3073 atomic_inc(&wqs[num_read_wqs]->usecnt); 3074 } 3075 3076 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3077 if (IS_ERR(uobj)) { 3078 err = PTR_ERR(uobj); 3079 goto put_wqs; 3080 } 3081 3082 rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table); 3083 if (!rwq_ind_tbl) { 3084 err = -ENOMEM; 3085 goto err_uobj; 3086 } 3087 3088 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3089 init_attr.ind_tbl = wqs; 3090 3091 rwq_ind_tbl->ind_tbl = wqs; 3092 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3093 rwq_ind_tbl->uobject = uobj; 3094 uobj->object = rwq_ind_tbl; 3095 rwq_ind_tbl->device = ib_dev; 3096 atomic_set(&rwq_ind_tbl->usecnt, 0); 3097 3098 err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr, 3099 &attrs->driver_udata); 3100 if (err) 3101 goto err_create; 3102 3103 for (i = 0; i < num_wq_handles; i++) 3104 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3105 UVERBS_LOOKUP_READ); 3106 kfree(wqs_handles); 3107 uobj_finalize_uobj_create(uobj, attrs); 3108 3109 resp.ind_tbl_handle = uobj->id; 3110 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3111 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3112 return uverbs_response(attrs, &resp, sizeof(resp)); 3113 3114 err_create: 3115 kfree(rwq_ind_tbl); 3116 err_uobj: 3117 uobj_alloc_abort(uobj, attrs); 3118 put_wqs: 3119 for (i = 0; i < num_read_wqs; i++) { 3120 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3121 UVERBS_LOOKUP_READ); 3122 atomic_dec(&wqs[i]->usecnt); 3123 } 3124 err_free: 3125 kfree(wqs_handles); 3126 kfree(wqs); 3127 return err; 3128 } 3129 3130 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3131 { 3132 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3133 int ret; 3134 3135 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3136 if (ret) 3137 return ret; 3138 3139 if (cmd.comp_mask) 3140 return -EOPNOTSUPP; 3141 3142 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3143 cmd.ind_tbl_handle, attrs); 3144 } 3145 3146 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3147 { 3148 struct ib_uverbs_create_flow cmd; 3149 struct ib_uverbs_create_flow_resp resp = {}; 3150 struct ib_uobject *uobj; 3151 struct ib_flow *flow_id; 3152 struct ib_uverbs_flow_attr *kern_flow_attr; 3153 struct ib_flow_attr *flow_attr; 3154 struct ib_qp *qp; 3155 struct ib_uflow_resources *uflow_res; 3156 struct ib_uverbs_flow_spec_hdr *kern_spec; 3157 struct uverbs_req_iter iter; 3158 int err; 3159 void *ib_spec; 3160 int i; 3161 struct ib_device *ib_dev; 3162 3163 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3164 if (err) 3165 return err; 3166 3167 if (cmd.comp_mask) 3168 return -EINVAL; 3169 3170 if (!capable(CAP_NET_RAW)) 3171 return -EPERM; 3172 3173 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3174 return -EINVAL; 3175 3176 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3177 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3178 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3179 return -EINVAL; 3180 3181 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3182 return -EINVAL; 3183 3184 if (cmd.flow_attr.size > 3185 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3186 return -EINVAL; 3187 3188 if (cmd.flow_attr.reserved[0] || 3189 cmd.flow_attr.reserved[1]) 3190 return -EINVAL; 3191 3192 if (cmd.flow_attr.num_of_specs) { 3193 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3194 GFP_KERNEL); 3195 if (!kern_flow_attr) 3196 return -ENOMEM; 3197 3198 *kern_flow_attr = cmd.flow_attr; 3199 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3200 cmd.flow_attr.size); 3201 if (err) 3202 goto err_free_attr; 3203 } else { 3204 kern_flow_attr = &cmd.flow_attr; 3205 } 3206 3207 err = uverbs_request_finish(&iter); 3208 if (err) 3209 goto err_free_attr; 3210 3211 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3212 if (IS_ERR(uobj)) { 3213 err = PTR_ERR(uobj); 3214 goto err_free_attr; 3215 } 3216 3217 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3218 if (!qp) { 3219 err = -EINVAL; 3220 goto err_uobj; 3221 } 3222 3223 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3224 err = -EINVAL; 3225 goto err_put; 3226 } 3227 3228 flow_attr = kzalloc(struct_size(flow_attr, flows, 3229 cmd.flow_attr.num_of_specs), GFP_KERNEL); 3230 if (!flow_attr) { 3231 err = -ENOMEM; 3232 goto err_put; 3233 } 3234 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3235 if (!uflow_res) { 3236 err = -ENOMEM; 3237 goto err_free_flow_attr; 3238 } 3239 3240 flow_attr->type = kern_flow_attr->type; 3241 flow_attr->priority = kern_flow_attr->priority; 3242 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3243 flow_attr->port = kern_flow_attr->port; 3244 flow_attr->flags = kern_flow_attr->flags; 3245 flow_attr->size = sizeof(*flow_attr); 3246 3247 kern_spec = kern_flow_attr->flow_specs; 3248 ib_spec = flow_attr + 1; 3249 for (i = 0; i < flow_attr->num_of_specs && 3250 cmd.flow_attr.size >= sizeof(*kern_spec) && 3251 cmd.flow_attr.size >= kern_spec->size; 3252 i++) { 3253 err = kern_spec_to_ib_spec( 3254 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3255 ib_spec, uflow_res); 3256 if (err) 3257 goto err_free; 3258 3259 flow_attr->size += 3260 ((union ib_flow_spec *) ib_spec)->size; 3261 cmd.flow_attr.size -= kern_spec->size; 3262 kern_spec = ((void *)kern_spec) + kern_spec->size; 3263 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3264 } 3265 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3266 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n", 3267 i, cmd.flow_attr.size); 3268 err = -EINVAL; 3269 goto err_free; 3270 } 3271 3272 flow_id = qp->device->ops.create_flow(qp, flow_attr, 3273 &attrs->driver_udata); 3274 3275 if (IS_ERR(flow_id)) { 3276 err = PTR_ERR(flow_id); 3277 goto err_free; 3278 } 3279 3280 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3281 3282 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3283 UVERBS_LOOKUP_READ); 3284 kfree(flow_attr); 3285 3286 if (cmd.flow_attr.num_of_specs) 3287 kfree(kern_flow_attr); 3288 uobj_finalize_uobj_create(uobj, attrs); 3289 3290 resp.flow_handle = uobj->id; 3291 return uverbs_response(attrs, &resp, sizeof(resp)); 3292 3293 err_free: 3294 ib_uverbs_flow_resources_free(uflow_res); 3295 err_free_flow_attr: 3296 kfree(flow_attr); 3297 err_put: 3298 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3299 UVERBS_LOOKUP_READ); 3300 err_uobj: 3301 uobj_alloc_abort(uobj, attrs); 3302 err_free_attr: 3303 if (cmd.flow_attr.num_of_specs) 3304 kfree(kern_flow_attr); 3305 return err; 3306 } 3307 3308 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3309 { 3310 struct ib_uverbs_destroy_flow cmd; 3311 int ret; 3312 3313 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3314 if (ret) 3315 return ret; 3316 3317 if (cmd.comp_mask) 3318 return -EINVAL; 3319 3320 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3321 } 3322 3323 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3324 struct ib_uverbs_create_xsrq *cmd, 3325 struct ib_udata *udata) 3326 { 3327 struct ib_uverbs_create_srq_resp resp = {}; 3328 struct ib_usrq_object *obj; 3329 struct ib_pd *pd; 3330 struct ib_srq *srq; 3331 struct ib_srq_init_attr attr; 3332 int ret; 3333 struct ib_uobject *xrcd_uobj; 3334 struct ib_device *ib_dev; 3335 3336 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3337 &ib_dev); 3338 if (IS_ERR(obj)) 3339 return PTR_ERR(obj); 3340 3341 if (cmd->srq_type == IB_SRQT_TM) 3342 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3343 3344 if (cmd->srq_type == IB_SRQT_XRC) { 3345 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3346 attrs); 3347 if (IS_ERR(xrcd_uobj)) { 3348 ret = -EINVAL; 3349 goto err; 3350 } 3351 3352 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3353 if (!attr.ext.xrc.xrcd) { 3354 ret = -EINVAL; 3355 goto err_put_xrcd; 3356 } 3357 3358 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3359 atomic_inc(&obj->uxrcd->refcnt); 3360 } 3361 3362 if (ib_srq_has_cq(cmd->srq_type)) { 3363 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3364 cmd->cq_handle, attrs); 3365 if (!attr.ext.cq) { 3366 ret = -EINVAL; 3367 goto err_put_xrcd; 3368 } 3369 } 3370 3371 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3372 if (!pd) { 3373 ret = -EINVAL; 3374 goto err_put_cq; 3375 } 3376 3377 attr.event_handler = ib_uverbs_srq_event_handler; 3378 attr.srq_type = cmd->srq_type; 3379 attr.attr.max_wr = cmd->max_wr; 3380 attr.attr.max_sge = cmd->max_sge; 3381 attr.attr.srq_limit = cmd->srq_limit; 3382 3383 INIT_LIST_HEAD(&obj->uevent.event_list); 3384 obj->uevent.uobject.user_handle = cmd->user_handle; 3385 3386 srq = ib_create_srq_user(pd, &attr, obj, udata); 3387 if (IS_ERR(srq)) { 3388 ret = PTR_ERR(srq); 3389 goto err_put_pd; 3390 } 3391 3392 obj->uevent.uobject.object = srq; 3393 obj->uevent.uobject.user_handle = cmd->user_handle; 3394 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 3395 if (obj->uevent.event_file) 3396 uverbs_uobject_get(&obj->uevent.event_file->uobj); 3397 3398 if (cmd->srq_type == IB_SRQT_XRC) 3399 resp.srqn = srq->ext.xrc.srq_num; 3400 3401 if (cmd->srq_type == IB_SRQT_XRC) 3402 uobj_put_read(xrcd_uobj); 3403 3404 if (ib_srq_has_cq(cmd->srq_type)) 3405 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3406 UVERBS_LOOKUP_READ); 3407 3408 uobj_put_obj_read(pd); 3409 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 3410 3411 resp.srq_handle = obj->uevent.uobject.id; 3412 resp.max_wr = attr.attr.max_wr; 3413 resp.max_sge = attr.attr.max_sge; 3414 return uverbs_response(attrs, &resp, sizeof(resp)); 3415 3416 err_put_pd: 3417 uobj_put_obj_read(pd); 3418 err_put_cq: 3419 if (ib_srq_has_cq(cmd->srq_type)) 3420 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3421 UVERBS_LOOKUP_READ); 3422 3423 err_put_xrcd: 3424 if (cmd->srq_type == IB_SRQT_XRC) { 3425 atomic_dec(&obj->uxrcd->refcnt); 3426 uobj_put_read(xrcd_uobj); 3427 } 3428 3429 err: 3430 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3431 return ret; 3432 } 3433 3434 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3435 { 3436 struct ib_uverbs_create_srq cmd; 3437 struct ib_uverbs_create_xsrq xcmd; 3438 int ret; 3439 3440 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3441 if (ret) 3442 return ret; 3443 3444 memset(&xcmd, 0, sizeof(xcmd)); 3445 xcmd.response = cmd.response; 3446 xcmd.user_handle = cmd.user_handle; 3447 xcmd.srq_type = IB_SRQT_BASIC; 3448 xcmd.pd_handle = cmd.pd_handle; 3449 xcmd.max_wr = cmd.max_wr; 3450 xcmd.max_sge = cmd.max_sge; 3451 xcmd.srq_limit = cmd.srq_limit; 3452 3453 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3454 } 3455 3456 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3457 { 3458 struct ib_uverbs_create_xsrq cmd; 3459 int ret; 3460 3461 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3462 if (ret) 3463 return ret; 3464 3465 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3466 } 3467 3468 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3469 { 3470 struct ib_uverbs_modify_srq cmd; 3471 struct ib_srq *srq; 3472 struct ib_srq_attr attr; 3473 int ret; 3474 3475 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3476 if (ret) 3477 return ret; 3478 3479 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3480 if (!srq) 3481 return -EINVAL; 3482 3483 attr.max_wr = cmd.max_wr; 3484 attr.srq_limit = cmd.srq_limit; 3485 3486 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3487 &attrs->driver_udata); 3488 3489 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3490 UVERBS_LOOKUP_READ); 3491 3492 return ret; 3493 } 3494 3495 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3496 { 3497 struct ib_uverbs_query_srq cmd; 3498 struct ib_uverbs_query_srq_resp resp; 3499 struct ib_srq_attr attr; 3500 struct ib_srq *srq; 3501 int ret; 3502 3503 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3504 if (ret) 3505 return ret; 3506 3507 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3508 if (!srq) 3509 return -EINVAL; 3510 3511 ret = ib_query_srq(srq, &attr); 3512 3513 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3514 UVERBS_LOOKUP_READ); 3515 3516 if (ret) 3517 return ret; 3518 3519 memset(&resp, 0, sizeof resp); 3520 3521 resp.max_wr = attr.max_wr; 3522 resp.max_sge = attr.max_sge; 3523 resp.srq_limit = attr.srq_limit; 3524 3525 return uverbs_response(attrs, &resp, sizeof(resp)); 3526 } 3527 3528 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3529 { 3530 struct ib_uverbs_destroy_srq cmd; 3531 struct ib_uverbs_destroy_srq_resp resp; 3532 struct ib_uobject *uobj; 3533 struct ib_uevent_object *obj; 3534 int ret; 3535 3536 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3537 if (ret) 3538 return ret; 3539 3540 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3541 if (IS_ERR(uobj)) 3542 return PTR_ERR(uobj); 3543 3544 obj = container_of(uobj, struct ib_uevent_object, uobject); 3545 memset(&resp, 0, sizeof(resp)); 3546 resp.events_reported = obj->events_reported; 3547 3548 uobj_put_destroy(uobj); 3549 3550 return uverbs_response(attrs, &resp, sizeof(resp)); 3551 } 3552 3553 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3554 { 3555 struct ib_uverbs_ex_query_device_resp resp = {}; 3556 struct ib_uverbs_ex_query_device cmd; 3557 struct ib_device_attr attr = {0}; 3558 struct ib_ucontext *ucontext; 3559 struct ib_device *ib_dev; 3560 int err; 3561 3562 ucontext = ib_uverbs_get_ucontext(attrs); 3563 if (IS_ERR(ucontext)) 3564 return PTR_ERR(ucontext); 3565 ib_dev = ucontext->device; 3566 3567 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3568 if (err) 3569 return err; 3570 3571 if (cmd.comp_mask) 3572 return -EINVAL; 3573 3574 if (cmd.reserved) 3575 return -EINVAL; 3576 3577 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3578 if (err) 3579 return err; 3580 3581 copy_query_dev_fields(ucontext, &resp.base, &attr); 3582 3583 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3584 resp.odp_caps.per_transport_caps.rc_odp_caps = 3585 attr.odp_caps.per_transport_caps.rc_odp_caps; 3586 resp.odp_caps.per_transport_caps.uc_odp_caps = 3587 attr.odp_caps.per_transport_caps.uc_odp_caps; 3588 resp.odp_caps.per_transport_caps.ud_odp_caps = 3589 attr.odp_caps.per_transport_caps.ud_odp_caps; 3590 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3591 3592 resp.timestamp_mask = attr.timestamp_mask; 3593 resp.hca_core_clock = attr.hca_core_clock; 3594 resp.device_cap_flags_ex = attr.device_cap_flags; 3595 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3596 resp.rss_caps.max_rwq_indirection_tables = 3597 attr.rss_caps.max_rwq_indirection_tables; 3598 resp.rss_caps.max_rwq_indirection_table_size = 3599 attr.rss_caps.max_rwq_indirection_table_size; 3600 resp.max_wq_type_rq = attr.max_wq_type_rq; 3601 resp.raw_packet_caps = attr.raw_packet_caps; 3602 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3603 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3604 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3605 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3606 resp.tm_caps.flags = attr.tm_caps.flags; 3607 resp.cq_moderation_caps.max_cq_moderation_count = 3608 attr.cq_caps.max_cq_moderation_count; 3609 resp.cq_moderation_caps.max_cq_moderation_period = 3610 attr.cq_caps.max_cq_moderation_period; 3611 resp.max_dm_size = attr.max_dm_size; 3612 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3613 3614 return uverbs_response(attrs, &resp, sizeof(resp)); 3615 } 3616 3617 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3618 { 3619 struct ib_uverbs_ex_modify_cq cmd; 3620 struct ib_cq *cq; 3621 int ret; 3622 3623 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3624 if (ret) 3625 return ret; 3626 3627 if (!cmd.attr_mask || cmd.reserved) 3628 return -EINVAL; 3629 3630 if (cmd.attr_mask > IB_CQ_MODERATE) 3631 return -EOPNOTSUPP; 3632 3633 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3634 if (!cq) 3635 return -EINVAL; 3636 3637 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3638 3639 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3640 UVERBS_LOOKUP_READ); 3641 return ret; 3642 } 3643 3644 /* 3645 * Describe the input structs for write(). Some write methods have an input 3646 * only struct, most have an input and output. If the struct has an output then 3647 * the 'response' u64 must be the first field in the request structure. 3648 * 3649 * If udata is present then both the request and response structs have a 3650 * trailing driver_data flex array. In this case the size of the base struct 3651 * cannot be changed. 3652 */ 3653 #define UAPI_DEF_WRITE_IO(req, resp) \ 3654 .write.has_resp = 1 + \ 3655 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3656 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \ 3657 sizeof(u64)), \ 3658 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3659 3660 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3661 3662 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3663 UAPI_DEF_WRITE_IO(req, resp), \ 3664 .write.has_udata = \ 3665 1 + \ 3666 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3667 sizeof(req)) + \ 3668 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3669 sizeof(resp)) 3670 3671 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3672 UAPI_DEF_WRITE_I(req), \ 3673 .write.has_udata = \ 3674 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3675 sizeof(req)) 3676 3677 /* 3678 * The _EX versions are for use with WRITE_EX and allow the last struct member 3679 * to be specified. Buffers that do not include that member will be rejected. 3680 */ 3681 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3682 .write.has_resp = 1, \ 3683 .write.req_size = offsetofend(req, req_last_member), \ 3684 .write.resp_size = offsetofend(resp, resp_last_member) 3685 3686 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3687 .write.req_size = offsetofend(req, req_last_member) 3688 3689 const struct uapi_definition uverbs_def_write_intf[] = { 3690 DECLARE_UVERBS_OBJECT( 3691 UVERBS_OBJECT_AH, 3692 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3693 ib_uverbs_create_ah, 3694 UAPI_DEF_WRITE_UDATA_IO( 3695 struct ib_uverbs_create_ah, 3696 struct ib_uverbs_create_ah_resp), 3697 UAPI_DEF_METHOD_NEEDS_FN(create_ah)), 3698 DECLARE_UVERBS_WRITE( 3699 IB_USER_VERBS_CMD_DESTROY_AH, 3700 ib_uverbs_destroy_ah, 3701 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah), 3702 UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))), 3703 3704 DECLARE_UVERBS_OBJECT( 3705 UVERBS_OBJECT_COMP_CHANNEL, 3706 DECLARE_UVERBS_WRITE( 3707 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3708 ib_uverbs_create_comp_channel, 3709 UAPI_DEF_WRITE_IO( 3710 struct ib_uverbs_create_comp_channel, 3711 struct ib_uverbs_create_comp_channel_resp))), 3712 3713 DECLARE_UVERBS_OBJECT( 3714 UVERBS_OBJECT_CQ, 3715 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3716 ib_uverbs_create_cq, 3717 UAPI_DEF_WRITE_UDATA_IO( 3718 struct ib_uverbs_create_cq, 3719 struct ib_uverbs_create_cq_resp), 3720 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3721 DECLARE_UVERBS_WRITE( 3722 IB_USER_VERBS_CMD_DESTROY_CQ, 3723 ib_uverbs_destroy_cq, 3724 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3725 struct ib_uverbs_destroy_cq_resp), 3726 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3727 DECLARE_UVERBS_WRITE( 3728 IB_USER_VERBS_CMD_POLL_CQ, 3729 ib_uverbs_poll_cq, 3730 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3731 struct ib_uverbs_poll_cq_resp), 3732 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3733 DECLARE_UVERBS_WRITE( 3734 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3735 ib_uverbs_req_notify_cq, 3736 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3737 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3738 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3739 ib_uverbs_resize_cq, 3740 UAPI_DEF_WRITE_UDATA_IO( 3741 struct ib_uverbs_resize_cq, 3742 struct ib_uverbs_resize_cq_resp), 3743 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3744 DECLARE_UVERBS_WRITE_EX( 3745 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3746 ib_uverbs_ex_create_cq, 3747 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3748 reserved, 3749 struct ib_uverbs_ex_create_cq_resp, 3750 response_length), 3751 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3752 DECLARE_UVERBS_WRITE_EX( 3753 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3754 ib_uverbs_ex_modify_cq, 3755 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3756 UAPI_DEF_METHOD_NEEDS_FN(create_cq))), 3757 3758 DECLARE_UVERBS_OBJECT( 3759 UVERBS_OBJECT_DEVICE, 3760 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3761 ib_uverbs_get_context, 3762 UAPI_DEF_WRITE_UDATA_IO( 3763 struct ib_uverbs_get_context, 3764 struct ib_uverbs_get_context_resp)), 3765 DECLARE_UVERBS_WRITE( 3766 IB_USER_VERBS_CMD_QUERY_DEVICE, 3767 ib_uverbs_query_device, 3768 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3769 struct ib_uverbs_query_device_resp)), 3770 DECLARE_UVERBS_WRITE( 3771 IB_USER_VERBS_CMD_QUERY_PORT, 3772 ib_uverbs_query_port, 3773 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3774 struct ib_uverbs_query_port_resp), 3775 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3776 DECLARE_UVERBS_WRITE_EX( 3777 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3778 ib_uverbs_ex_query_device, 3779 UAPI_DEF_WRITE_IO_EX( 3780 struct ib_uverbs_ex_query_device, 3781 reserved, 3782 struct ib_uverbs_ex_query_device_resp, 3783 response_length), 3784 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3785 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3786 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3787 3788 DECLARE_UVERBS_OBJECT( 3789 UVERBS_OBJECT_FLOW, 3790 DECLARE_UVERBS_WRITE_EX( 3791 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3792 ib_uverbs_ex_create_flow, 3793 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3794 flow_attr, 3795 struct ib_uverbs_create_flow_resp, 3796 flow_handle), 3797 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3798 DECLARE_UVERBS_WRITE_EX( 3799 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3800 ib_uverbs_ex_destroy_flow, 3801 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3802 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3803 3804 DECLARE_UVERBS_OBJECT( 3805 UVERBS_OBJECT_MR, 3806 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3807 ib_uverbs_dereg_mr, 3808 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3809 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3810 DECLARE_UVERBS_WRITE( 3811 IB_USER_VERBS_CMD_REG_MR, 3812 ib_uverbs_reg_mr, 3813 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3814 struct ib_uverbs_reg_mr_resp), 3815 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3816 DECLARE_UVERBS_WRITE( 3817 IB_USER_VERBS_CMD_REREG_MR, 3818 ib_uverbs_rereg_mr, 3819 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3820 struct ib_uverbs_rereg_mr_resp), 3821 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3822 3823 DECLARE_UVERBS_OBJECT( 3824 UVERBS_OBJECT_MW, 3825 DECLARE_UVERBS_WRITE( 3826 IB_USER_VERBS_CMD_ALLOC_MW, 3827 ib_uverbs_alloc_mw, 3828 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3829 struct ib_uverbs_alloc_mw_resp), 3830 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3831 DECLARE_UVERBS_WRITE( 3832 IB_USER_VERBS_CMD_DEALLOC_MW, 3833 ib_uverbs_dealloc_mw, 3834 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3835 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3836 3837 DECLARE_UVERBS_OBJECT( 3838 UVERBS_OBJECT_PD, 3839 DECLARE_UVERBS_WRITE( 3840 IB_USER_VERBS_CMD_ALLOC_PD, 3841 ib_uverbs_alloc_pd, 3842 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3843 struct ib_uverbs_alloc_pd_resp), 3844 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3845 DECLARE_UVERBS_WRITE( 3846 IB_USER_VERBS_CMD_DEALLOC_PD, 3847 ib_uverbs_dealloc_pd, 3848 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3849 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3850 3851 DECLARE_UVERBS_OBJECT( 3852 UVERBS_OBJECT_QP, 3853 DECLARE_UVERBS_WRITE( 3854 IB_USER_VERBS_CMD_ATTACH_MCAST, 3855 ib_uverbs_attach_mcast, 3856 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3857 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3858 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3859 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3860 ib_uverbs_create_qp, 3861 UAPI_DEF_WRITE_UDATA_IO( 3862 struct ib_uverbs_create_qp, 3863 struct ib_uverbs_create_qp_resp), 3864 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3865 DECLARE_UVERBS_WRITE( 3866 IB_USER_VERBS_CMD_DESTROY_QP, 3867 ib_uverbs_destroy_qp, 3868 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3869 struct ib_uverbs_destroy_qp_resp), 3870 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3871 DECLARE_UVERBS_WRITE( 3872 IB_USER_VERBS_CMD_DETACH_MCAST, 3873 ib_uverbs_detach_mcast, 3874 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3875 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3876 DECLARE_UVERBS_WRITE( 3877 IB_USER_VERBS_CMD_MODIFY_QP, 3878 ib_uverbs_modify_qp, 3879 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3880 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3881 DECLARE_UVERBS_WRITE( 3882 IB_USER_VERBS_CMD_POST_RECV, 3883 ib_uverbs_post_recv, 3884 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3885 struct ib_uverbs_post_recv_resp), 3886 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3887 DECLARE_UVERBS_WRITE( 3888 IB_USER_VERBS_CMD_POST_SEND, 3889 ib_uverbs_post_send, 3890 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3891 struct ib_uverbs_post_send_resp), 3892 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3893 DECLARE_UVERBS_WRITE( 3894 IB_USER_VERBS_CMD_QUERY_QP, 3895 ib_uverbs_query_qp, 3896 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3897 struct ib_uverbs_query_qp_resp), 3898 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3899 DECLARE_UVERBS_WRITE_EX( 3900 IB_USER_VERBS_EX_CMD_CREATE_QP, 3901 ib_uverbs_ex_create_qp, 3902 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3903 comp_mask, 3904 struct ib_uverbs_ex_create_qp_resp, 3905 response_length), 3906 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3907 DECLARE_UVERBS_WRITE_EX( 3908 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3909 ib_uverbs_ex_modify_qp, 3910 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3911 base, 3912 struct ib_uverbs_ex_modify_qp_resp, 3913 response_length), 3914 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3915 3916 DECLARE_UVERBS_OBJECT( 3917 UVERBS_OBJECT_RWQ_IND_TBL, 3918 DECLARE_UVERBS_WRITE_EX( 3919 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3920 ib_uverbs_ex_create_rwq_ind_table, 3921 UAPI_DEF_WRITE_IO_EX( 3922 struct ib_uverbs_ex_create_rwq_ind_table, 3923 log_ind_tbl_size, 3924 struct ib_uverbs_ex_create_rwq_ind_table_resp, 3925 ind_tbl_num), 3926 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 3927 DECLARE_UVERBS_WRITE_EX( 3928 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 3929 ib_uverbs_ex_destroy_rwq_ind_table, 3930 UAPI_DEF_WRITE_I( 3931 struct ib_uverbs_ex_destroy_rwq_ind_table), 3932 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 3933 3934 DECLARE_UVERBS_OBJECT( 3935 UVERBS_OBJECT_WQ, 3936 DECLARE_UVERBS_WRITE_EX( 3937 IB_USER_VERBS_EX_CMD_CREATE_WQ, 3938 ib_uverbs_ex_create_wq, 3939 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 3940 max_sge, 3941 struct ib_uverbs_ex_create_wq_resp, 3942 wqn), 3943 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 3944 DECLARE_UVERBS_WRITE_EX( 3945 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 3946 ib_uverbs_ex_destroy_wq, 3947 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 3948 wq_handle, 3949 struct ib_uverbs_ex_destroy_wq_resp, 3950 reserved), 3951 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 3952 DECLARE_UVERBS_WRITE_EX( 3953 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 3954 ib_uverbs_ex_modify_wq, 3955 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 3956 curr_wq_state), 3957 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 3958 3959 DECLARE_UVERBS_OBJECT( 3960 UVERBS_OBJECT_SRQ, 3961 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 3962 ib_uverbs_create_srq, 3963 UAPI_DEF_WRITE_UDATA_IO( 3964 struct ib_uverbs_create_srq, 3965 struct ib_uverbs_create_srq_resp), 3966 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 3967 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 3968 ib_uverbs_create_xsrq, 3969 UAPI_DEF_WRITE_UDATA_IO( 3970 struct ib_uverbs_create_xsrq, 3971 struct ib_uverbs_create_srq_resp), 3972 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 3973 DECLARE_UVERBS_WRITE( 3974 IB_USER_VERBS_CMD_DESTROY_SRQ, 3975 ib_uverbs_destroy_srq, 3976 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 3977 struct ib_uverbs_destroy_srq_resp), 3978 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 3979 DECLARE_UVERBS_WRITE( 3980 IB_USER_VERBS_CMD_MODIFY_SRQ, 3981 ib_uverbs_modify_srq, 3982 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 3983 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 3984 DECLARE_UVERBS_WRITE( 3985 IB_USER_VERBS_CMD_POST_SRQ_RECV, 3986 ib_uverbs_post_srq_recv, 3987 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 3988 struct ib_uverbs_post_srq_recv_resp), 3989 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 3990 DECLARE_UVERBS_WRITE( 3991 IB_USER_VERBS_CMD_QUERY_SRQ, 3992 ib_uverbs_query_srq, 3993 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 3994 struct ib_uverbs_query_srq_resp), 3995 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 3996 3997 DECLARE_UVERBS_OBJECT( 3998 UVERBS_OBJECT_XRCD, 3999 DECLARE_UVERBS_WRITE( 4000 IB_USER_VERBS_CMD_CLOSE_XRCD, 4001 ib_uverbs_close_xrcd, 4002 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd), 4003 UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)), 4004 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4005 ib_uverbs_open_qp, 4006 UAPI_DEF_WRITE_UDATA_IO( 4007 struct ib_uverbs_open_qp, 4008 struct ib_uverbs_create_qp_resp)), 4009 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4010 ib_uverbs_open_xrcd, 4011 UAPI_DEF_WRITE_UDATA_IO( 4012 struct ib_uverbs_open_xrcd, 4013 struct ib_uverbs_open_xrcd_resp), 4014 UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))), 4015 4016 {}, 4017 }; 4018