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