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 = min_t(u32, ib_dev->phys_port_cnt, U8_MAX); 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 mr->length = cmd.length; 743 744 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 745 rdma_restrack_set_name(&mr->res, NULL); 746 rdma_restrack_add(&mr->res); 747 748 uobj->object = mr; 749 uobj_put_obj_read(pd); 750 uobj_finalize_uobj_create(uobj, attrs); 751 752 resp.lkey = mr->lkey; 753 resp.rkey = mr->rkey; 754 resp.mr_handle = uobj->id; 755 return uverbs_response(attrs, &resp, sizeof(resp)); 756 757 err_put: 758 uobj_put_obj_read(pd); 759 err_free: 760 uobj_alloc_abort(uobj, attrs); 761 return ret; 762 } 763 764 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 765 { 766 struct ib_uverbs_rereg_mr cmd; 767 struct ib_uverbs_rereg_mr_resp resp; 768 struct ib_mr *mr; 769 int ret; 770 struct ib_uobject *uobj; 771 struct ib_uobject *new_uobj; 772 struct ib_device *ib_dev; 773 struct ib_pd *orig_pd; 774 struct ib_pd *new_pd; 775 struct ib_mr *new_mr; 776 777 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 778 if (ret) 779 return ret; 780 781 if (!cmd.flags) 782 return -EINVAL; 783 784 if (cmd.flags & ~IB_MR_REREG_SUPPORTED) 785 return -EOPNOTSUPP; 786 787 if ((cmd.flags & IB_MR_REREG_TRANS) && 788 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 789 return -EINVAL; 790 791 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 792 if (IS_ERR(uobj)) 793 return PTR_ERR(uobj); 794 795 mr = uobj->object; 796 797 if (mr->dm) { 798 ret = -EINVAL; 799 goto put_uobjs; 800 } 801 802 if (cmd.flags & IB_MR_REREG_ACCESS) { 803 ret = ib_check_mr_access(mr->device, cmd.access_flags); 804 if (ret) 805 goto put_uobjs; 806 } 807 808 orig_pd = mr->pd; 809 if (cmd.flags & IB_MR_REREG_PD) { 810 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 811 attrs); 812 if (!new_pd) { 813 ret = -EINVAL; 814 goto put_uobjs; 815 } 816 } else { 817 new_pd = mr->pd; 818 } 819 820 /* 821 * The driver might create a new HW object as part of the rereg, we need 822 * to have a uobject ready to hold it. 823 */ 824 new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 825 if (IS_ERR(new_uobj)) { 826 ret = PTR_ERR(new_uobj); 827 goto put_uobj_pd; 828 } 829 830 new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length, 831 cmd.hca_va, cmd.access_flags, new_pd, 832 &attrs->driver_udata); 833 if (IS_ERR(new_mr)) { 834 ret = PTR_ERR(new_mr); 835 goto put_new_uobj; 836 } 837 if (new_mr) { 838 new_mr->device = new_pd->device; 839 new_mr->pd = new_pd; 840 new_mr->type = IB_MR_TYPE_USER; 841 new_mr->uobject = uobj; 842 atomic_inc(&new_pd->usecnt); 843 new_uobj->object = new_mr; 844 845 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR); 846 rdma_restrack_set_name(&new_mr->res, NULL); 847 rdma_restrack_add(&new_mr->res); 848 849 /* 850 * The new uobj for the new HW object is put into the same spot 851 * in the IDR and the old uobj & HW object is deleted. 852 */ 853 rdma_assign_uobject(uobj, new_uobj, attrs); 854 rdma_alloc_commit_uobject(new_uobj, attrs); 855 uobj_put_destroy(uobj); 856 new_uobj = NULL; 857 uobj = NULL; 858 mr = new_mr; 859 } else { 860 if (cmd.flags & IB_MR_REREG_PD) { 861 atomic_dec(&orig_pd->usecnt); 862 mr->pd = new_pd; 863 atomic_inc(&new_pd->usecnt); 864 } 865 if (cmd.flags & IB_MR_REREG_TRANS) { 866 mr->iova = cmd.hca_va; 867 mr->length = cmd.length; 868 } 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 1406 attr.cap.max_send_wr = cmd->max_send_wr; 1407 attr.cap.max_recv_wr = cmd->max_recv_wr; 1408 attr.cap.max_send_sge = cmd->max_send_sge; 1409 attr.cap.max_recv_sge = cmd->max_recv_sge; 1410 attr.cap.max_inline_data = cmd->max_inline_data; 1411 1412 INIT_LIST_HEAD(&obj->uevent.event_list); 1413 INIT_LIST_HEAD(&obj->mcast_list); 1414 1415 attr.create_flags = cmd->create_flags; 1416 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1417 IB_QP_CREATE_CROSS_CHANNEL | 1418 IB_QP_CREATE_MANAGED_SEND | 1419 IB_QP_CREATE_MANAGED_RECV | 1420 IB_QP_CREATE_SCATTER_FCS | 1421 IB_QP_CREATE_CVLAN_STRIPPING | 1422 IB_QP_CREATE_SOURCE_QPN | 1423 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1424 ret = -EINVAL; 1425 goto err_put; 1426 } 1427 1428 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1429 if (!capable(CAP_NET_RAW)) { 1430 ret = -EPERM; 1431 goto err_put; 1432 } 1433 1434 attr.source_qpn = cmd->source_qpn; 1435 } 1436 1437 qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj, 1438 KBUILD_MODNAME); 1439 if (IS_ERR(qp)) { 1440 ret = PTR_ERR(qp); 1441 goto err_put; 1442 } 1443 ib_qp_usecnt_inc(qp); 1444 1445 obj->uevent.uobject.object = qp; 1446 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1447 if (obj->uevent.event_file) 1448 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1449 1450 if (xrcd) { 1451 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1452 uobject); 1453 atomic_inc(&obj->uxrcd->refcnt); 1454 uobj_put_read(xrcd_uobj); 1455 } 1456 1457 if (pd) 1458 uobj_put_obj_read(pd); 1459 if (scq) 1460 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1461 UVERBS_LOOKUP_READ); 1462 if (rcq && rcq != scq) 1463 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1464 UVERBS_LOOKUP_READ); 1465 if (srq) 1466 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1467 UVERBS_LOOKUP_READ); 1468 if (ind_tbl) 1469 uobj_put_obj_read(ind_tbl); 1470 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1471 1472 resp.base.qpn = qp->qp_num; 1473 resp.base.qp_handle = obj->uevent.uobject.id; 1474 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1475 resp.base.max_send_sge = attr.cap.max_send_sge; 1476 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1477 resp.base.max_send_wr = attr.cap.max_send_wr; 1478 resp.base.max_inline_data = attr.cap.max_inline_data; 1479 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1480 return uverbs_response(attrs, &resp, sizeof(resp)); 1481 1482 err_put: 1483 if (!IS_ERR(xrcd_uobj)) 1484 uobj_put_read(xrcd_uobj); 1485 if (pd) 1486 uobj_put_obj_read(pd); 1487 if (scq) 1488 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1489 UVERBS_LOOKUP_READ); 1490 if (rcq && rcq != scq) 1491 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1492 UVERBS_LOOKUP_READ); 1493 if (srq) 1494 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1495 UVERBS_LOOKUP_READ); 1496 if (ind_tbl) 1497 uobj_put_obj_read(ind_tbl); 1498 1499 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1500 return ret; 1501 } 1502 1503 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1504 { 1505 struct ib_uverbs_create_qp cmd; 1506 struct ib_uverbs_ex_create_qp cmd_ex; 1507 int ret; 1508 1509 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1510 if (ret) 1511 return ret; 1512 1513 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1514 cmd_ex.user_handle = cmd.user_handle; 1515 cmd_ex.pd_handle = cmd.pd_handle; 1516 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1517 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1518 cmd_ex.srq_handle = cmd.srq_handle; 1519 cmd_ex.max_send_wr = cmd.max_send_wr; 1520 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1521 cmd_ex.max_send_sge = cmd.max_send_sge; 1522 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1523 cmd_ex.max_inline_data = cmd.max_inline_data; 1524 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1525 cmd_ex.qp_type = cmd.qp_type; 1526 cmd_ex.is_srq = cmd.is_srq; 1527 1528 return create_qp(attrs, &cmd_ex); 1529 } 1530 1531 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1532 { 1533 struct ib_uverbs_ex_create_qp cmd; 1534 int ret; 1535 1536 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1537 if (ret) 1538 return ret; 1539 1540 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1541 return -EINVAL; 1542 1543 if (cmd.reserved) 1544 return -EINVAL; 1545 1546 return create_qp(attrs, &cmd); 1547 } 1548 1549 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1550 { 1551 struct ib_uverbs_create_qp_resp resp = {}; 1552 struct ib_uverbs_open_qp cmd; 1553 struct ib_uqp_object *obj; 1554 struct ib_xrcd *xrcd; 1555 struct ib_qp *qp; 1556 struct ib_qp_open_attr attr = {}; 1557 int ret; 1558 struct ib_uobject *xrcd_uobj; 1559 struct ib_device *ib_dev; 1560 1561 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1562 if (ret) 1563 return ret; 1564 1565 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1566 &ib_dev); 1567 if (IS_ERR(obj)) 1568 return PTR_ERR(obj); 1569 1570 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1571 if (IS_ERR(xrcd_uobj)) { 1572 ret = -EINVAL; 1573 goto err_put; 1574 } 1575 1576 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1577 if (!xrcd) { 1578 ret = -EINVAL; 1579 goto err_xrcd; 1580 } 1581 1582 attr.event_handler = ib_uverbs_qp_event_handler; 1583 attr.qp_num = cmd.qpn; 1584 attr.qp_type = cmd.qp_type; 1585 1586 INIT_LIST_HEAD(&obj->uevent.event_list); 1587 INIT_LIST_HEAD(&obj->mcast_list); 1588 1589 qp = ib_open_qp(xrcd, &attr); 1590 if (IS_ERR(qp)) { 1591 ret = PTR_ERR(qp); 1592 goto err_xrcd; 1593 } 1594 1595 obj->uevent.uobject.object = qp; 1596 obj->uevent.uobject.user_handle = cmd.user_handle; 1597 1598 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1599 atomic_inc(&obj->uxrcd->refcnt); 1600 qp->uobject = obj; 1601 uobj_put_read(xrcd_uobj); 1602 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1603 1604 resp.qpn = qp->qp_num; 1605 resp.qp_handle = obj->uevent.uobject.id; 1606 return uverbs_response(attrs, &resp, sizeof(resp)); 1607 1608 err_xrcd: 1609 uobj_put_read(xrcd_uobj); 1610 err_put: 1611 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1612 return ret; 1613 } 1614 1615 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, 1616 struct rdma_ah_attr *rdma_attr) 1617 { 1618 const struct ib_global_route *grh; 1619 1620 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr); 1621 uverb_attr->sl = rdma_ah_get_sl(rdma_attr); 1622 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr); 1623 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr); 1624 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) & 1625 IB_AH_GRH); 1626 if (uverb_attr->is_global) { 1627 grh = rdma_ah_read_grh(rdma_attr); 1628 memcpy(uverb_attr->dgid, grh->dgid.raw, 16); 1629 uverb_attr->flow_label = grh->flow_label; 1630 uverb_attr->sgid_index = grh->sgid_index; 1631 uverb_attr->hop_limit = grh->hop_limit; 1632 uverb_attr->traffic_class = grh->traffic_class; 1633 } 1634 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr); 1635 } 1636 1637 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) 1638 { 1639 struct ib_uverbs_query_qp cmd; 1640 struct ib_uverbs_query_qp_resp resp; 1641 struct ib_qp *qp; 1642 struct ib_qp_attr *attr; 1643 struct ib_qp_init_attr *init_attr; 1644 int ret; 1645 1646 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1647 if (ret) 1648 return ret; 1649 1650 attr = kmalloc(sizeof *attr, GFP_KERNEL); 1651 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 1652 if (!attr || !init_attr) { 1653 ret = -ENOMEM; 1654 goto out; 1655 } 1656 1657 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1658 if (!qp) { 1659 ret = -EINVAL; 1660 goto out; 1661 } 1662 1663 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1664 1665 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1666 UVERBS_LOOKUP_READ); 1667 1668 if (ret) 1669 goto out; 1670 1671 memset(&resp, 0, sizeof resp); 1672 1673 resp.qp_state = attr->qp_state; 1674 resp.cur_qp_state = attr->cur_qp_state; 1675 resp.path_mtu = attr->path_mtu; 1676 resp.path_mig_state = attr->path_mig_state; 1677 resp.qkey = attr->qkey; 1678 resp.rq_psn = attr->rq_psn; 1679 resp.sq_psn = attr->sq_psn; 1680 resp.dest_qp_num = attr->dest_qp_num; 1681 resp.qp_access_flags = attr->qp_access_flags; 1682 resp.pkey_index = attr->pkey_index; 1683 resp.alt_pkey_index = attr->alt_pkey_index; 1684 resp.sq_draining = attr->sq_draining; 1685 resp.max_rd_atomic = attr->max_rd_atomic; 1686 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1687 resp.min_rnr_timer = attr->min_rnr_timer; 1688 resp.port_num = attr->port_num; 1689 resp.timeout = attr->timeout; 1690 resp.retry_cnt = attr->retry_cnt; 1691 resp.rnr_retry = attr->rnr_retry; 1692 resp.alt_port_num = attr->alt_port_num; 1693 resp.alt_timeout = attr->alt_timeout; 1694 1695 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1696 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1697 1698 resp.max_send_wr = init_attr->cap.max_send_wr; 1699 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1700 resp.max_send_sge = init_attr->cap.max_send_sge; 1701 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1702 resp.max_inline_data = init_attr->cap.max_inline_data; 1703 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1704 1705 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1706 1707 out: 1708 kfree(attr); 1709 kfree(init_attr); 1710 1711 return ret; 1712 } 1713 1714 /* Remove ignored fields set in the attribute mask */ 1715 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1716 { 1717 switch (qp_type) { 1718 case IB_QPT_XRC_INI: 1719 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1720 case IB_QPT_XRC_TGT: 1721 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1722 IB_QP_RNR_RETRY); 1723 default: 1724 return mask; 1725 } 1726 } 1727 1728 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1729 struct rdma_ah_attr *rdma_attr, 1730 struct ib_uverbs_qp_dest *uverb_attr) 1731 { 1732 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); 1733 if (uverb_attr->is_global) { 1734 rdma_ah_set_grh(rdma_attr, NULL, 1735 uverb_attr->flow_label, 1736 uverb_attr->sgid_index, 1737 uverb_attr->hop_limit, 1738 uverb_attr->traffic_class); 1739 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); 1740 } else { 1741 rdma_ah_set_ah_flags(rdma_attr, 0); 1742 } 1743 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); 1744 rdma_ah_set_sl(rdma_attr, uverb_attr->sl); 1745 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); 1746 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); 1747 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); 1748 rdma_ah_set_make_grd(rdma_attr, false); 1749 } 1750 1751 static int modify_qp(struct uverbs_attr_bundle *attrs, 1752 struct ib_uverbs_ex_modify_qp *cmd) 1753 { 1754 struct ib_qp_attr *attr; 1755 struct ib_qp *qp; 1756 int ret; 1757 1758 attr = kzalloc(sizeof(*attr), GFP_KERNEL); 1759 if (!attr) 1760 return -ENOMEM; 1761 1762 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1763 attrs); 1764 if (!qp) { 1765 ret = -EINVAL; 1766 goto out; 1767 } 1768 1769 if ((cmd->base.attr_mask & IB_QP_PORT) && 1770 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1771 ret = -EINVAL; 1772 goto release_qp; 1773 } 1774 1775 if ((cmd->base.attr_mask & IB_QP_AV)) { 1776 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1777 ret = -EINVAL; 1778 goto release_qp; 1779 } 1780 1781 if (cmd->base.attr_mask & IB_QP_STATE && 1782 cmd->base.qp_state == IB_QPS_RTR) { 1783 /* We are in INIT->RTR TRANSITION (if we are not, 1784 * this transition will be rejected in subsequent checks). 1785 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1786 * but the IB_QP_STATE flag is required. 1787 * 1788 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1789 * when IB_QP_AV is set, has required inclusion of a valid 1790 * port number in the primary AV. (AVs are created and handled 1791 * differently for infiniband and ethernet (RoCE) ports). 1792 * 1793 * Check the port number included in the primary AV against 1794 * the port number in the qp struct, which was set (and saved) 1795 * in the RST->INIT transition. 1796 */ 1797 if (cmd->base.dest.port_num != qp->real_qp->port) { 1798 ret = -EINVAL; 1799 goto release_qp; 1800 } 1801 } else { 1802 /* We are in SQD->SQD. (If we are not, this transition will 1803 * be rejected later in the verbs layer checks). 1804 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1805 * together in the SQD->SQD transition. 1806 * 1807 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1808 * verbs layer driver does not track primary port changes 1809 * resulting from path migration. Thus, in SQD, if the primary 1810 * AV is modified, the primary port should also be modified). 1811 * 1812 * Note that in this transition, the IB_QP_STATE flag 1813 * is not allowed. 1814 */ 1815 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1816 == (IB_QP_AV | IB_QP_PORT)) && 1817 cmd->base.port_num != cmd->base.dest.port_num) { 1818 ret = -EINVAL; 1819 goto release_qp; 1820 } 1821 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1822 == IB_QP_AV) { 1823 cmd->base.attr_mask |= IB_QP_PORT; 1824 cmd->base.port_num = cmd->base.dest.port_num; 1825 } 1826 } 1827 } 1828 1829 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1830 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1831 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1832 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1833 ret = -EINVAL; 1834 goto release_qp; 1835 } 1836 1837 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1838 cmd->base.cur_qp_state > IB_QPS_ERR) || 1839 (cmd->base.attr_mask & IB_QP_STATE && 1840 cmd->base.qp_state > IB_QPS_ERR)) { 1841 ret = -EINVAL; 1842 goto release_qp; 1843 } 1844 1845 if (cmd->base.attr_mask & IB_QP_STATE) 1846 attr->qp_state = cmd->base.qp_state; 1847 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1848 attr->cur_qp_state = cmd->base.cur_qp_state; 1849 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1850 attr->path_mtu = cmd->base.path_mtu; 1851 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1852 attr->path_mig_state = cmd->base.path_mig_state; 1853 if (cmd->base.attr_mask & IB_QP_QKEY) { 1854 if (cmd->base.qkey & IB_QP_SET_QKEY && !capable(CAP_NET_RAW)) { 1855 ret = -EPERM; 1856 goto release_qp; 1857 } 1858 attr->qkey = cmd->base.qkey; 1859 } 1860 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1861 attr->rq_psn = cmd->base.rq_psn; 1862 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1863 attr->sq_psn = cmd->base.sq_psn; 1864 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1865 attr->dest_qp_num = cmd->base.dest_qp_num; 1866 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1867 attr->qp_access_flags = cmd->base.qp_access_flags; 1868 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1869 attr->pkey_index = cmd->base.pkey_index; 1870 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1871 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1872 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1873 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1874 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1875 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1876 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1877 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1878 if (cmd->base.attr_mask & IB_QP_PORT) 1879 attr->port_num = cmd->base.port_num; 1880 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1881 attr->timeout = cmd->base.timeout; 1882 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1883 attr->retry_cnt = cmd->base.retry_cnt; 1884 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1885 attr->rnr_retry = cmd->base.rnr_retry; 1886 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1887 attr->alt_port_num = cmd->base.alt_port_num; 1888 attr->alt_timeout = cmd->base.alt_timeout; 1889 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1890 } 1891 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1892 attr->rate_limit = cmd->rate_limit; 1893 1894 if (cmd->base.attr_mask & IB_QP_AV) 1895 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1896 &cmd->base.dest); 1897 1898 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1899 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1900 &cmd->base.alt_dest); 1901 1902 ret = ib_modify_qp_with_udata(qp, attr, 1903 modify_qp_mask(qp->qp_type, 1904 cmd->base.attr_mask), 1905 &attrs->driver_udata); 1906 1907 release_qp: 1908 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1909 UVERBS_LOOKUP_READ); 1910 out: 1911 kfree(attr); 1912 1913 return ret; 1914 } 1915 1916 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1917 { 1918 struct ib_uverbs_ex_modify_qp cmd; 1919 int ret; 1920 1921 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1922 if (ret) 1923 return ret; 1924 1925 if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 1926 return -EOPNOTSUPP; 1927 1928 return modify_qp(attrs, &cmd); 1929 } 1930 1931 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1932 { 1933 struct ib_uverbs_ex_modify_qp cmd; 1934 struct ib_uverbs_ex_modify_qp_resp resp = { 1935 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1936 }; 1937 int ret; 1938 1939 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1940 if (ret) 1941 return ret; 1942 1943 /* 1944 * Last bit is reserved for extending the attr_mask by 1945 * using another field. 1946 */ 1947 if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT)) 1948 return -EOPNOTSUPP; 1949 1950 ret = modify_qp(attrs, &cmd); 1951 if (ret) 1952 return ret; 1953 1954 return uverbs_response(attrs, &resp, sizeof(resp)); 1955 } 1956 1957 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1958 { 1959 struct ib_uverbs_destroy_qp cmd; 1960 struct ib_uverbs_destroy_qp_resp resp; 1961 struct ib_uobject *uobj; 1962 struct ib_uqp_object *obj; 1963 int ret; 1964 1965 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1966 if (ret) 1967 return ret; 1968 1969 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1970 if (IS_ERR(uobj)) 1971 return PTR_ERR(uobj); 1972 1973 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1974 memset(&resp, 0, sizeof(resp)); 1975 resp.events_reported = obj->uevent.events_reported; 1976 1977 uobj_put_destroy(uobj); 1978 1979 return uverbs_response(attrs, &resp, sizeof(resp)); 1980 } 1981 1982 static void *alloc_wr(size_t wr_size, __u32 num_sge) 1983 { 1984 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) / 1985 sizeof(struct ib_sge)) 1986 return NULL; 1987 1988 return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) + 1989 num_sge * sizeof(struct ib_sge), 1990 GFP_KERNEL); 1991 } 1992 1993 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 1994 { 1995 struct ib_uverbs_post_send cmd; 1996 struct ib_uverbs_post_send_resp resp; 1997 struct ib_uverbs_send_wr *user_wr; 1998 struct ib_send_wr *wr = NULL, *last, *next; 1999 const struct ib_send_wr *bad_wr; 2000 struct ib_qp *qp; 2001 int i, sg_ind; 2002 int is_ud; 2003 int ret, ret2; 2004 size_t next_size; 2005 const struct ib_sge __user *sgls; 2006 const void __user *wqes; 2007 struct uverbs_req_iter iter; 2008 2009 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2010 if (ret) 2011 return ret; 2012 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count); 2013 if (IS_ERR(wqes)) 2014 return PTR_ERR(wqes); 2015 sgls = uverbs_request_next_ptr( 2016 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge)); 2017 if (IS_ERR(sgls)) 2018 return PTR_ERR(sgls); 2019 ret = uverbs_request_finish(&iter); 2020 if (ret) 2021 return ret; 2022 2023 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2024 if (!user_wr) 2025 return -ENOMEM; 2026 2027 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2028 if (!qp) { 2029 ret = -EINVAL; 2030 goto out; 2031 } 2032 2033 is_ud = qp->qp_type == IB_QPT_UD; 2034 sg_ind = 0; 2035 last = NULL; 2036 for (i = 0; i < cmd.wr_count; ++i) { 2037 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2038 cmd.wqe_size)) { 2039 ret = -EFAULT; 2040 goto out_put; 2041 } 2042 2043 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2044 ret = -EINVAL; 2045 goto out_put; 2046 } 2047 2048 if (is_ud) { 2049 struct ib_ud_wr *ud; 2050 2051 if (user_wr->opcode != IB_WR_SEND && 2052 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2053 ret = -EINVAL; 2054 goto out_put; 2055 } 2056 2057 next_size = sizeof(*ud); 2058 ud = alloc_wr(next_size, user_wr->num_sge); 2059 if (!ud) { 2060 ret = -ENOMEM; 2061 goto out_put; 2062 } 2063 2064 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2065 user_wr->wr.ud.ah, attrs); 2066 if (!ud->ah) { 2067 kfree(ud); 2068 ret = -EINVAL; 2069 goto out_put; 2070 } 2071 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2072 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2073 2074 next = &ud->wr; 2075 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2076 user_wr->opcode == IB_WR_RDMA_WRITE || 2077 user_wr->opcode == IB_WR_RDMA_READ) { 2078 struct ib_rdma_wr *rdma; 2079 2080 next_size = sizeof(*rdma); 2081 rdma = alloc_wr(next_size, user_wr->num_sge); 2082 if (!rdma) { 2083 ret = -ENOMEM; 2084 goto out_put; 2085 } 2086 2087 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2088 rdma->rkey = user_wr->wr.rdma.rkey; 2089 2090 next = &rdma->wr; 2091 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2092 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2093 struct ib_atomic_wr *atomic; 2094 2095 next_size = sizeof(*atomic); 2096 atomic = alloc_wr(next_size, user_wr->num_sge); 2097 if (!atomic) { 2098 ret = -ENOMEM; 2099 goto out_put; 2100 } 2101 2102 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2103 atomic->compare_add = user_wr->wr.atomic.compare_add; 2104 atomic->swap = user_wr->wr.atomic.swap; 2105 atomic->rkey = user_wr->wr.atomic.rkey; 2106 2107 next = &atomic->wr; 2108 } else if (user_wr->opcode == IB_WR_SEND || 2109 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2110 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2111 next_size = sizeof(*next); 2112 next = alloc_wr(next_size, user_wr->num_sge); 2113 if (!next) { 2114 ret = -ENOMEM; 2115 goto out_put; 2116 } 2117 } else { 2118 ret = -EINVAL; 2119 goto out_put; 2120 } 2121 2122 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2123 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2124 next->ex.imm_data = 2125 (__be32 __force) user_wr->ex.imm_data; 2126 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2127 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2128 } 2129 2130 if (!last) 2131 wr = next; 2132 else 2133 last->next = next; 2134 last = next; 2135 2136 next->next = NULL; 2137 next->wr_id = user_wr->wr_id; 2138 next->num_sge = user_wr->num_sge; 2139 next->opcode = user_wr->opcode; 2140 next->send_flags = user_wr->send_flags; 2141 2142 if (next->num_sge) { 2143 next->sg_list = (void *) next + 2144 ALIGN(next_size, sizeof(struct ib_sge)); 2145 if (copy_from_user(next->sg_list, sgls + sg_ind, 2146 next->num_sge * 2147 sizeof(struct ib_sge))) { 2148 ret = -EFAULT; 2149 goto out_put; 2150 } 2151 sg_ind += next->num_sge; 2152 } else 2153 next->sg_list = NULL; 2154 } 2155 2156 resp.bad_wr = 0; 2157 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2158 if (ret) 2159 for (next = wr; next; next = next->next) { 2160 ++resp.bad_wr; 2161 if (next == bad_wr) 2162 break; 2163 } 2164 2165 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2166 if (ret2) 2167 ret = ret2; 2168 2169 out_put: 2170 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2171 UVERBS_LOOKUP_READ); 2172 2173 while (wr) { 2174 if (is_ud && ud_wr(wr)->ah) 2175 uobj_put_obj_read(ud_wr(wr)->ah); 2176 next = wr->next; 2177 kfree(wr); 2178 wr = next; 2179 } 2180 2181 out: 2182 kfree(user_wr); 2183 2184 return ret; 2185 } 2186 2187 static struct ib_recv_wr * 2188 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2189 u32 wqe_size, u32 sge_count) 2190 { 2191 struct ib_uverbs_recv_wr *user_wr; 2192 struct ib_recv_wr *wr = NULL, *last, *next; 2193 int sg_ind; 2194 int i; 2195 int ret; 2196 const struct ib_sge __user *sgls; 2197 const void __user *wqes; 2198 2199 if (wqe_size < sizeof(struct ib_uverbs_recv_wr)) 2200 return ERR_PTR(-EINVAL); 2201 2202 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count); 2203 if (IS_ERR(wqes)) 2204 return ERR_CAST(wqes); 2205 sgls = uverbs_request_next_ptr( 2206 iter, sge_count * sizeof(struct ib_uverbs_sge)); 2207 if (IS_ERR(sgls)) 2208 return ERR_CAST(sgls); 2209 ret = uverbs_request_finish(iter); 2210 if (ret) 2211 return ERR_PTR(ret); 2212 2213 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2214 if (!user_wr) 2215 return ERR_PTR(-ENOMEM); 2216 2217 sg_ind = 0; 2218 last = NULL; 2219 for (i = 0; i < wr_count; ++i) { 2220 if (copy_from_user(user_wr, wqes + i * wqe_size, 2221 wqe_size)) { 2222 ret = -EFAULT; 2223 goto err; 2224 } 2225 2226 if (user_wr->num_sge + sg_ind > sge_count) { 2227 ret = -EINVAL; 2228 goto err; 2229 } 2230 2231 if (user_wr->num_sge >= 2232 (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) / 2233 sizeof(struct ib_sge)) { 2234 ret = -EINVAL; 2235 goto err; 2236 } 2237 2238 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) + 2239 user_wr->num_sge * sizeof(struct ib_sge), 2240 GFP_KERNEL); 2241 if (!next) { 2242 ret = -ENOMEM; 2243 goto err; 2244 } 2245 2246 if (!last) 2247 wr = next; 2248 else 2249 last->next = next; 2250 last = next; 2251 2252 next->next = NULL; 2253 next->wr_id = user_wr->wr_id; 2254 next->num_sge = user_wr->num_sge; 2255 2256 if (next->num_sge) { 2257 next->sg_list = (void *)next + 2258 ALIGN(sizeof(*next), sizeof(struct ib_sge)); 2259 if (copy_from_user(next->sg_list, sgls + sg_ind, 2260 next->num_sge * 2261 sizeof(struct ib_sge))) { 2262 ret = -EFAULT; 2263 goto err; 2264 } 2265 sg_ind += next->num_sge; 2266 } else 2267 next->sg_list = NULL; 2268 } 2269 2270 kfree(user_wr); 2271 return wr; 2272 2273 err: 2274 kfree(user_wr); 2275 2276 while (wr) { 2277 next = wr->next; 2278 kfree(wr); 2279 wr = next; 2280 } 2281 2282 return ERR_PTR(ret); 2283 } 2284 2285 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2286 { 2287 struct ib_uverbs_post_recv cmd; 2288 struct ib_uverbs_post_recv_resp resp; 2289 struct ib_recv_wr *wr, *next; 2290 const struct ib_recv_wr *bad_wr; 2291 struct ib_qp *qp; 2292 int ret, ret2; 2293 struct uverbs_req_iter iter; 2294 2295 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2296 if (ret) 2297 return ret; 2298 2299 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2300 cmd.sge_count); 2301 if (IS_ERR(wr)) 2302 return PTR_ERR(wr); 2303 2304 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2305 if (!qp) { 2306 ret = -EINVAL; 2307 goto out; 2308 } 2309 2310 resp.bad_wr = 0; 2311 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2312 2313 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2314 UVERBS_LOOKUP_READ); 2315 if (ret) { 2316 for (next = wr; next; next = next->next) { 2317 ++resp.bad_wr; 2318 if (next == bad_wr) 2319 break; 2320 } 2321 } 2322 2323 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2324 if (ret2) 2325 ret = ret2; 2326 out: 2327 while (wr) { 2328 next = wr->next; 2329 kfree(wr); 2330 wr = next; 2331 } 2332 2333 return ret; 2334 } 2335 2336 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2337 { 2338 struct ib_uverbs_post_srq_recv cmd; 2339 struct ib_uverbs_post_srq_recv_resp resp; 2340 struct ib_recv_wr *wr, *next; 2341 const struct ib_recv_wr *bad_wr; 2342 struct ib_srq *srq; 2343 int ret, ret2; 2344 struct uverbs_req_iter iter; 2345 2346 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2347 if (ret) 2348 return ret; 2349 2350 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2351 cmd.sge_count); 2352 if (IS_ERR(wr)) 2353 return PTR_ERR(wr); 2354 2355 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2356 if (!srq) { 2357 ret = -EINVAL; 2358 goto out; 2359 } 2360 2361 resp.bad_wr = 0; 2362 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2363 2364 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 2365 UVERBS_LOOKUP_READ); 2366 2367 if (ret) 2368 for (next = wr; next; next = next->next) { 2369 ++resp.bad_wr; 2370 if (next == bad_wr) 2371 break; 2372 } 2373 2374 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2375 if (ret2) 2376 ret = ret2; 2377 2378 out: 2379 while (wr) { 2380 next = wr->next; 2381 kfree(wr); 2382 wr = next; 2383 } 2384 2385 return ret; 2386 } 2387 2388 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2389 { 2390 struct ib_uverbs_create_ah cmd; 2391 struct ib_uverbs_create_ah_resp resp; 2392 struct ib_uobject *uobj; 2393 struct ib_pd *pd; 2394 struct ib_ah *ah; 2395 struct rdma_ah_attr attr = {}; 2396 int ret; 2397 struct ib_device *ib_dev; 2398 2399 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2400 if (ret) 2401 return ret; 2402 2403 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2404 if (IS_ERR(uobj)) 2405 return PTR_ERR(uobj); 2406 2407 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2408 ret = -EINVAL; 2409 goto err; 2410 } 2411 2412 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2413 if (!pd) { 2414 ret = -EINVAL; 2415 goto err; 2416 } 2417 2418 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2419 rdma_ah_set_make_grd(&attr, false); 2420 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2421 rdma_ah_set_sl(&attr, cmd.attr.sl); 2422 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2423 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2424 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2425 2426 if (cmd.attr.is_global) { 2427 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2428 cmd.attr.grh.sgid_index, 2429 cmd.attr.grh.hop_limit, 2430 cmd.attr.grh.traffic_class); 2431 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2432 } else { 2433 rdma_ah_set_ah_flags(&attr, 0); 2434 } 2435 2436 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2437 if (IS_ERR(ah)) { 2438 ret = PTR_ERR(ah); 2439 goto err_put; 2440 } 2441 2442 ah->uobject = uobj; 2443 uobj->user_handle = cmd.user_handle; 2444 uobj->object = ah; 2445 uobj_put_obj_read(pd); 2446 uobj_finalize_uobj_create(uobj, attrs); 2447 2448 resp.ah_handle = uobj->id; 2449 return uverbs_response(attrs, &resp, sizeof(resp)); 2450 2451 err_put: 2452 uobj_put_obj_read(pd); 2453 err: 2454 uobj_alloc_abort(uobj, attrs); 2455 return ret; 2456 } 2457 2458 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2459 { 2460 struct ib_uverbs_destroy_ah cmd; 2461 int ret; 2462 2463 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2464 if (ret) 2465 return ret; 2466 2467 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2468 } 2469 2470 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2471 { 2472 struct ib_uverbs_attach_mcast cmd; 2473 struct ib_qp *qp; 2474 struct ib_uqp_object *obj; 2475 struct ib_uverbs_mcast_entry *mcast; 2476 int ret; 2477 2478 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2479 if (ret) 2480 return ret; 2481 2482 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2483 if (!qp) 2484 return -EINVAL; 2485 2486 obj = qp->uobject; 2487 2488 mutex_lock(&obj->mcast_lock); 2489 list_for_each_entry(mcast, &obj->mcast_list, list) 2490 if (cmd.mlid == mcast->lid && 2491 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2492 ret = 0; 2493 goto out_put; 2494 } 2495 2496 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2497 if (!mcast) { 2498 ret = -ENOMEM; 2499 goto out_put; 2500 } 2501 2502 mcast->lid = cmd.mlid; 2503 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2504 2505 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2506 if (!ret) 2507 list_add_tail(&mcast->list, &obj->mcast_list); 2508 else 2509 kfree(mcast); 2510 2511 out_put: 2512 mutex_unlock(&obj->mcast_lock); 2513 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2514 UVERBS_LOOKUP_READ); 2515 2516 return ret; 2517 } 2518 2519 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2520 { 2521 struct ib_uverbs_detach_mcast cmd; 2522 struct ib_uqp_object *obj; 2523 struct ib_qp *qp; 2524 struct ib_uverbs_mcast_entry *mcast; 2525 int ret; 2526 bool found = false; 2527 2528 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2529 if (ret) 2530 return ret; 2531 2532 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2533 if (!qp) 2534 return -EINVAL; 2535 2536 obj = qp->uobject; 2537 mutex_lock(&obj->mcast_lock); 2538 2539 list_for_each_entry(mcast, &obj->mcast_list, list) 2540 if (cmd.mlid == mcast->lid && 2541 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2542 list_del(&mcast->list); 2543 kfree(mcast); 2544 found = true; 2545 break; 2546 } 2547 2548 if (!found) { 2549 ret = -EINVAL; 2550 goto out_put; 2551 } 2552 2553 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2554 2555 out_put: 2556 mutex_unlock(&obj->mcast_lock); 2557 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2558 UVERBS_LOOKUP_READ); 2559 return ret; 2560 } 2561 2562 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2563 { 2564 struct ib_uflow_resources *resources; 2565 2566 resources = kzalloc(sizeof(*resources), GFP_KERNEL); 2567 2568 if (!resources) 2569 return NULL; 2570 2571 if (!num_specs) 2572 goto out; 2573 2574 resources->counters = 2575 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); 2576 resources->collection = 2577 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); 2578 2579 if (!resources->counters || !resources->collection) 2580 goto err; 2581 2582 out: 2583 resources->max = num_specs; 2584 return resources; 2585 2586 err: 2587 kfree(resources->counters); 2588 kfree(resources); 2589 2590 return NULL; 2591 } 2592 EXPORT_SYMBOL(flow_resources_alloc); 2593 2594 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2595 { 2596 unsigned int i; 2597 2598 if (!uflow_res) 2599 return; 2600 2601 for (i = 0; i < uflow_res->collection_num; i++) 2602 atomic_dec(&uflow_res->collection[i]->usecnt); 2603 2604 for (i = 0; i < uflow_res->counters_num; i++) 2605 atomic_dec(&uflow_res->counters[i]->usecnt); 2606 2607 kfree(uflow_res->collection); 2608 kfree(uflow_res->counters); 2609 kfree(uflow_res); 2610 } 2611 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2612 2613 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2614 enum ib_flow_spec_type type, 2615 void *ibobj) 2616 { 2617 WARN_ON(uflow_res->num >= uflow_res->max); 2618 2619 switch (type) { 2620 case IB_FLOW_SPEC_ACTION_HANDLE: 2621 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2622 uflow_res->collection[uflow_res->collection_num++] = 2623 (struct ib_flow_action *)ibobj; 2624 break; 2625 case IB_FLOW_SPEC_ACTION_COUNT: 2626 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2627 uflow_res->counters[uflow_res->counters_num++] = 2628 (struct ib_counters *)ibobj; 2629 break; 2630 default: 2631 WARN_ON(1); 2632 } 2633 2634 uflow_res->num++; 2635 } 2636 EXPORT_SYMBOL(flow_resources_add); 2637 2638 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2639 struct ib_uverbs_flow_spec *kern_spec, 2640 union ib_flow_spec *ib_spec, 2641 struct ib_uflow_resources *uflow_res) 2642 { 2643 ib_spec->type = kern_spec->type; 2644 switch (ib_spec->type) { 2645 case IB_FLOW_SPEC_ACTION_TAG: 2646 if (kern_spec->flow_tag.size != 2647 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2648 return -EINVAL; 2649 2650 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2651 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2652 break; 2653 case IB_FLOW_SPEC_ACTION_DROP: 2654 if (kern_spec->drop.size != 2655 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2656 return -EINVAL; 2657 2658 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2659 break; 2660 case IB_FLOW_SPEC_ACTION_HANDLE: 2661 if (kern_spec->action.size != 2662 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2663 return -EOPNOTSUPP; 2664 ib_spec->action.act = uobj_get_obj_read(flow_action, 2665 UVERBS_OBJECT_FLOW_ACTION, 2666 kern_spec->action.handle, 2667 attrs); 2668 if (!ib_spec->action.act) 2669 return -EINVAL; 2670 ib_spec->action.size = 2671 sizeof(struct ib_flow_spec_action_handle); 2672 flow_resources_add(uflow_res, 2673 IB_FLOW_SPEC_ACTION_HANDLE, 2674 ib_spec->action.act); 2675 uobj_put_obj_read(ib_spec->action.act); 2676 break; 2677 case IB_FLOW_SPEC_ACTION_COUNT: 2678 if (kern_spec->flow_count.size != 2679 sizeof(struct ib_uverbs_flow_spec_action_count)) 2680 return -EINVAL; 2681 ib_spec->flow_count.counters = 2682 uobj_get_obj_read(counters, 2683 UVERBS_OBJECT_COUNTERS, 2684 kern_spec->flow_count.handle, 2685 attrs); 2686 if (!ib_spec->flow_count.counters) 2687 return -EINVAL; 2688 ib_spec->flow_count.size = 2689 sizeof(struct ib_flow_spec_action_count); 2690 flow_resources_add(uflow_res, 2691 IB_FLOW_SPEC_ACTION_COUNT, 2692 ib_spec->flow_count.counters); 2693 uobj_put_obj_read(ib_spec->flow_count.counters); 2694 break; 2695 default: 2696 return -EINVAL; 2697 } 2698 return 0; 2699 } 2700 2701 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2702 u16 ib_real_filter_sz) 2703 { 2704 /* 2705 * User space filter structures must be 64 bit aligned, otherwise this 2706 * may pass, but we won't handle additional new attributes. 2707 */ 2708 2709 if (kern_filter_size > ib_real_filter_sz) { 2710 if (memchr_inv(kern_spec_filter + 2711 ib_real_filter_sz, 0, 2712 kern_filter_size - ib_real_filter_sz)) 2713 return -EINVAL; 2714 return ib_real_filter_sz; 2715 } 2716 return kern_filter_size; 2717 } 2718 2719 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2720 const void *kern_spec_mask, 2721 const void *kern_spec_val, 2722 size_t kern_filter_sz, 2723 union ib_flow_spec *ib_spec) 2724 { 2725 ssize_t actual_filter_sz; 2726 ssize_t ib_filter_sz; 2727 2728 /* User flow spec size must be aligned to 4 bytes */ 2729 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2730 return -EINVAL; 2731 2732 ib_spec->type = type; 2733 2734 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2735 return -EINVAL; 2736 2737 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2738 case IB_FLOW_SPEC_ETH: 2739 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz); 2740 actual_filter_sz = spec_filter_size(kern_spec_mask, 2741 kern_filter_sz, 2742 ib_filter_sz); 2743 if (actual_filter_sz <= 0) 2744 return -EINVAL; 2745 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2746 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2747 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2748 break; 2749 case IB_FLOW_SPEC_IPV4: 2750 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz); 2751 actual_filter_sz = spec_filter_size(kern_spec_mask, 2752 kern_filter_sz, 2753 ib_filter_sz); 2754 if (actual_filter_sz <= 0) 2755 return -EINVAL; 2756 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2757 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2758 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2759 break; 2760 case IB_FLOW_SPEC_IPV6: 2761 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz); 2762 actual_filter_sz = spec_filter_size(kern_spec_mask, 2763 kern_filter_sz, 2764 ib_filter_sz); 2765 if (actual_filter_sz <= 0) 2766 return -EINVAL; 2767 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2768 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2769 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2770 2771 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2772 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2773 return -EINVAL; 2774 break; 2775 case IB_FLOW_SPEC_TCP: 2776 case IB_FLOW_SPEC_UDP: 2777 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz); 2778 actual_filter_sz = spec_filter_size(kern_spec_mask, 2779 kern_filter_sz, 2780 ib_filter_sz); 2781 if (actual_filter_sz <= 0) 2782 return -EINVAL; 2783 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2784 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2785 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2786 break; 2787 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2788 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz); 2789 actual_filter_sz = spec_filter_size(kern_spec_mask, 2790 kern_filter_sz, 2791 ib_filter_sz); 2792 if (actual_filter_sz <= 0) 2793 return -EINVAL; 2794 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2795 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2796 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2797 2798 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2799 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2800 return -EINVAL; 2801 break; 2802 case IB_FLOW_SPEC_ESP: 2803 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz); 2804 actual_filter_sz = spec_filter_size(kern_spec_mask, 2805 kern_filter_sz, 2806 ib_filter_sz); 2807 if (actual_filter_sz <= 0) 2808 return -EINVAL; 2809 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2810 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2811 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2812 break; 2813 case IB_FLOW_SPEC_GRE: 2814 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz); 2815 actual_filter_sz = spec_filter_size(kern_spec_mask, 2816 kern_filter_sz, 2817 ib_filter_sz); 2818 if (actual_filter_sz <= 0) 2819 return -EINVAL; 2820 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2821 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2822 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2823 break; 2824 case IB_FLOW_SPEC_MPLS: 2825 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz); 2826 actual_filter_sz = spec_filter_size(kern_spec_mask, 2827 kern_filter_sz, 2828 ib_filter_sz); 2829 if (actual_filter_sz <= 0) 2830 return -EINVAL; 2831 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2832 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2833 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2834 break; 2835 default: 2836 return -EINVAL; 2837 } 2838 return 0; 2839 } 2840 2841 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2842 union ib_flow_spec *ib_spec) 2843 { 2844 size_t kern_filter_sz; 2845 void *kern_spec_mask; 2846 void *kern_spec_val; 2847 2848 if (check_sub_overflow((size_t)kern_spec->hdr.size, 2849 sizeof(struct ib_uverbs_flow_spec_hdr), 2850 &kern_filter_sz)) 2851 return -EINVAL; 2852 2853 kern_filter_sz /= 2; 2854 2855 kern_spec_val = (void *)kern_spec + 2856 sizeof(struct ib_uverbs_flow_spec_hdr); 2857 kern_spec_mask = kern_spec_val + kern_filter_sz; 2858 2859 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2860 kern_spec_mask, 2861 kern_spec_val, 2862 kern_filter_sz, ib_spec); 2863 } 2864 2865 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2866 struct ib_uverbs_flow_spec *kern_spec, 2867 union ib_flow_spec *ib_spec, 2868 struct ib_uflow_resources *uflow_res) 2869 { 2870 if (kern_spec->reserved) 2871 return -EINVAL; 2872 2873 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2874 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2875 uflow_res); 2876 else 2877 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2878 } 2879 2880 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2881 { 2882 struct ib_uverbs_ex_create_wq cmd; 2883 struct ib_uverbs_ex_create_wq_resp resp = {}; 2884 struct ib_uwq_object *obj; 2885 int err = 0; 2886 struct ib_cq *cq; 2887 struct ib_pd *pd; 2888 struct ib_wq *wq; 2889 struct ib_wq_init_attr wq_init_attr = {}; 2890 struct ib_device *ib_dev; 2891 2892 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2893 if (err) 2894 return err; 2895 2896 if (cmd.comp_mask) 2897 return -EOPNOTSUPP; 2898 2899 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2900 &ib_dev); 2901 if (IS_ERR(obj)) 2902 return PTR_ERR(obj); 2903 2904 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2905 if (!pd) { 2906 err = -EINVAL; 2907 goto err_uobj; 2908 } 2909 2910 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2911 if (!cq) { 2912 err = -EINVAL; 2913 goto err_put_pd; 2914 } 2915 2916 wq_init_attr.cq = cq; 2917 wq_init_attr.max_sge = cmd.max_sge; 2918 wq_init_attr.max_wr = cmd.max_wr; 2919 wq_init_attr.wq_type = cmd.wq_type; 2920 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2921 wq_init_attr.create_flags = cmd.create_flags; 2922 INIT_LIST_HEAD(&obj->uevent.event_list); 2923 obj->uevent.uobject.user_handle = cmd.user_handle; 2924 2925 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2926 if (IS_ERR(wq)) { 2927 err = PTR_ERR(wq); 2928 goto err_put_cq; 2929 } 2930 2931 wq->uobject = obj; 2932 obj->uevent.uobject.object = wq; 2933 wq->wq_type = wq_init_attr.wq_type; 2934 wq->cq = cq; 2935 wq->pd = pd; 2936 wq->device = pd->device; 2937 atomic_set(&wq->usecnt, 0); 2938 atomic_inc(&pd->usecnt); 2939 atomic_inc(&cq->usecnt); 2940 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 2941 if (obj->uevent.event_file) 2942 uverbs_uobject_get(&obj->uevent.event_file->uobj); 2943 2944 uobj_put_obj_read(pd); 2945 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2946 UVERBS_LOOKUP_READ); 2947 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 2948 2949 resp.wq_handle = obj->uevent.uobject.id; 2950 resp.max_sge = wq_init_attr.max_sge; 2951 resp.max_wr = wq_init_attr.max_wr; 2952 resp.wqn = wq->wq_num; 2953 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2954 return uverbs_response(attrs, &resp, sizeof(resp)); 2955 2956 err_put_cq: 2957 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2958 UVERBS_LOOKUP_READ); 2959 err_put_pd: 2960 uobj_put_obj_read(pd); 2961 err_uobj: 2962 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2963 2964 return err; 2965 } 2966 2967 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2968 { 2969 struct ib_uverbs_ex_destroy_wq cmd; 2970 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 2971 struct ib_uobject *uobj; 2972 struct ib_uwq_object *obj; 2973 int ret; 2974 2975 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2976 if (ret) 2977 return ret; 2978 2979 if (cmd.comp_mask) 2980 return -EOPNOTSUPP; 2981 2982 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2983 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 2984 if (IS_ERR(uobj)) 2985 return PTR_ERR(uobj); 2986 2987 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 2988 resp.events_reported = obj->uevent.events_reported; 2989 2990 uobj_put_destroy(uobj); 2991 2992 return uverbs_response(attrs, &resp, sizeof(resp)); 2993 } 2994 2995 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 2996 { 2997 struct ib_uverbs_ex_modify_wq cmd; 2998 struct ib_wq *wq; 2999 struct ib_wq_attr wq_attr = {}; 3000 int ret; 3001 3002 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3003 if (ret) 3004 return ret; 3005 3006 if (!cmd.attr_mask) 3007 return -EINVAL; 3008 3009 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3010 return -EINVAL; 3011 3012 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3013 if (!wq) 3014 return -EINVAL; 3015 3016 if (cmd.attr_mask & IB_WQ_FLAGS) { 3017 wq_attr.flags = cmd.flags; 3018 wq_attr.flags_mask = cmd.flags_mask; 3019 } 3020 3021 if (cmd.attr_mask & IB_WQ_CUR_STATE) { 3022 if (cmd.curr_wq_state > IB_WQS_ERR) 3023 return -EINVAL; 3024 3025 wq_attr.curr_wq_state = cmd.curr_wq_state; 3026 } else { 3027 wq_attr.curr_wq_state = wq->state; 3028 } 3029 3030 if (cmd.attr_mask & IB_WQ_STATE) { 3031 if (cmd.wq_state > IB_WQS_ERR) 3032 return -EINVAL; 3033 3034 wq_attr.wq_state = cmd.wq_state; 3035 } else { 3036 wq_attr.wq_state = wq_attr.curr_wq_state; 3037 } 3038 3039 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3040 &attrs->driver_udata); 3041 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, 3042 UVERBS_LOOKUP_READ); 3043 return ret; 3044 } 3045 3046 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3047 { 3048 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3049 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3050 struct ib_uobject *uobj; 3051 int err; 3052 struct ib_rwq_ind_table_init_attr init_attr = {}; 3053 struct ib_rwq_ind_table *rwq_ind_tbl; 3054 struct ib_wq **wqs = NULL; 3055 u32 *wqs_handles = NULL; 3056 struct ib_wq *wq = NULL; 3057 int i, num_read_wqs; 3058 u32 num_wq_handles; 3059 struct uverbs_req_iter iter; 3060 struct ib_device *ib_dev; 3061 3062 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3063 if (err) 3064 return err; 3065 3066 if (cmd.comp_mask) 3067 return -EOPNOTSUPP; 3068 3069 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3070 return -EINVAL; 3071 3072 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3073 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3074 GFP_KERNEL); 3075 if (!wqs_handles) 3076 return -ENOMEM; 3077 3078 err = uverbs_request_next(&iter, wqs_handles, 3079 num_wq_handles * sizeof(__u32)); 3080 if (err) 3081 goto err_free; 3082 3083 err = uverbs_request_finish(&iter); 3084 if (err) 3085 goto err_free; 3086 3087 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); 3088 if (!wqs) { 3089 err = -ENOMEM; 3090 goto err_free; 3091 } 3092 3093 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3094 num_read_wqs++) { 3095 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3096 wqs_handles[num_read_wqs], attrs); 3097 if (!wq) { 3098 err = -EINVAL; 3099 goto put_wqs; 3100 } 3101 3102 wqs[num_read_wqs] = wq; 3103 atomic_inc(&wqs[num_read_wqs]->usecnt); 3104 } 3105 3106 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3107 if (IS_ERR(uobj)) { 3108 err = PTR_ERR(uobj); 3109 goto put_wqs; 3110 } 3111 3112 rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table); 3113 if (!rwq_ind_tbl) { 3114 err = -ENOMEM; 3115 goto err_uobj; 3116 } 3117 3118 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3119 init_attr.ind_tbl = wqs; 3120 3121 rwq_ind_tbl->ind_tbl = wqs; 3122 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3123 rwq_ind_tbl->uobject = uobj; 3124 uobj->object = rwq_ind_tbl; 3125 rwq_ind_tbl->device = ib_dev; 3126 atomic_set(&rwq_ind_tbl->usecnt, 0); 3127 3128 err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr, 3129 &attrs->driver_udata); 3130 if (err) 3131 goto err_create; 3132 3133 for (i = 0; i < num_wq_handles; i++) 3134 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3135 UVERBS_LOOKUP_READ); 3136 kfree(wqs_handles); 3137 uobj_finalize_uobj_create(uobj, attrs); 3138 3139 resp.ind_tbl_handle = uobj->id; 3140 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3141 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3142 return uverbs_response(attrs, &resp, sizeof(resp)); 3143 3144 err_create: 3145 kfree(rwq_ind_tbl); 3146 err_uobj: 3147 uobj_alloc_abort(uobj, attrs); 3148 put_wqs: 3149 for (i = 0; i < num_read_wqs; i++) { 3150 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3151 UVERBS_LOOKUP_READ); 3152 atomic_dec(&wqs[i]->usecnt); 3153 } 3154 err_free: 3155 kfree(wqs_handles); 3156 kfree(wqs); 3157 return err; 3158 } 3159 3160 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3161 { 3162 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3163 int ret; 3164 3165 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3166 if (ret) 3167 return ret; 3168 3169 if (cmd.comp_mask) 3170 return -EOPNOTSUPP; 3171 3172 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3173 cmd.ind_tbl_handle, attrs); 3174 } 3175 3176 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3177 { 3178 struct ib_uverbs_create_flow cmd; 3179 struct ib_uverbs_create_flow_resp resp = {}; 3180 struct ib_uobject *uobj; 3181 struct ib_flow *flow_id; 3182 struct ib_uverbs_flow_attr *kern_flow_attr; 3183 struct ib_flow_attr *flow_attr; 3184 struct ib_qp *qp; 3185 struct ib_uflow_resources *uflow_res; 3186 struct ib_uverbs_flow_spec_hdr *kern_spec; 3187 struct uverbs_req_iter iter; 3188 int err; 3189 void *ib_spec; 3190 int i; 3191 struct ib_device *ib_dev; 3192 3193 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3194 if (err) 3195 return err; 3196 3197 if (cmd.comp_mask) 3198 return -EINVAL; 3199 3200 if (!capable(CAP_NET_RAW)) 3201 return -EPERM; 3202 3203 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3204 return -EINVAL; 3205 3206 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3207 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3208 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3209 return -EINVAL; 3210 3211 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3212 return -EINVAL; 3213 3214 if (cmd.flow_attr.size > 3215 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3216 return -EINVAL; 3217 3218 if (cmd.flow_attr.reserved[0] || 3219 cmd.flow_attr.reserved[1]) 3220 return -EINVAL; 3221 3222 if (cmd.flow_attr.num_of_specs) { 3223 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3224 GFP_KERNEL); 3225 if (!kern_flow_attr) 3226 return -ENOMEM; 3227 3228 *kern_flow_attr = cmd.flow_attr; 3229 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3230 cmd.flow_attr.size); 3231 if (err) 3232 goto err_free_attr; 3233 } else { 3234 kern_flow_attr = &cmd.flow_attr; 3235 } 3236 3237 err = uverbs_request_finish(&iter); 3238 if (err) 3239 goto err_free_attr; 3240 3241 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3242 if (IS_ERR(uobj)) { 3243 err = PTR_ERR(uobj); 3244 goto err_free_attr; 3245 } 3246 3247 if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) { 3248 err = -EINVAL; 3249 goto err_uobj; 3250 } 3251 3252 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3253 if (!qp) { 3254 err = -EINVAL; 3255 goto err_uobj; 3256 } 3257 3258 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3259 err = -EINVAL; 3260 goto err_put; 3261 } 3262 3263 flow_attr = kzalloc(struct_size(flow_attr, flows, 3264 cmd.flow_attr.num_of_specs), GFP_KERNEL); 3265 if (!flow_attr) { 3266 err = -ENOMEM; 3267 goto err_put; 3268 } 3269 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3270 if (!uflow_res) { 3271 err = -ENOMEM; 3272 goto err_free_flow_attr; 3273 } 3274 3275 flow_attr->type = kern_flow_attr->type; 3276 flow_attr->priority = kern_flow_attr->priority; 3277 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3278 flow_attr->port = kern_flow_attr->port; 3279 flow_attr->flags = kern_flow_attr->flags; 3280 flow_attr->size = sizeof(*flow_attr); 3281 3282 kern_spec = kern_flow_attr->flow_specs; 3283 ib_spec = flow_attr + 1; 3284 for (i = 0; i < flow_attr->num_of_specs && 3285 cmd.flow_attr.size >= sizeof(*kern_spec) && 3286 cmd.flow_attr.size >= kern_spec->size; 3287 i++) { 3288 err = kern_spec_to_ib_spec( 3289 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3290 ib_spec, uflow_res); 3291 if (err) 3292 goto err_free; 3293 3294 flow_attr->size += 3295 ((union ib_flow_spec *) ib_spec)->size; 3296 cmd.flow_attr.size -= kern_spec->size; 3297 kern_spec = ((void *)kern_spec) + kern_spec->size; 3298 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3299 } 3300 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3301 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n", 3302 i, cmd.flow_attr.size); 3303 err = -EINVAL; 3304 goto err_free; 3305 } 3306 3307 flow_id = qp->device->ops.create_flow(qp, flow_attr, 3308 &attrs->driver_udata); 3309 3310 if (IS_ERR(flow_id)) { 3311 err = PTR_ERR(flow_id); 3312 goto err_free; 3313 } 3314 3315 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3316 3317 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3318 UVERBS_LOOKUP_READ); 3319 kfree(flow_attr); 3320 3321 if (cmd.flow_attr.num_of_specs) 3322 kfree(kern_flow_attr); 3323 uobj_finalize_uobj_create(uobj, attrs); 3324 3325 resp.flow_handle = uobj->id; 3326 return uverbs_response(attrs, &resp, sizeof(resp)); 3327 3328 err_free: 3329 ib_uverbs_flow_resources_free(uflow_res); 3330 err_free_flow_attr: 3331 kfree(flow_attr); 3332 err_put: 3333 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3334 UVERBS_LOOKUP_READ); 3335 err_uobj: 3336 uobj_alloc_abort(uobj, attrs); 3337 err_free_attr: 3338 if (cmd.flow_attr.num_of_specs) 3339 kfree(kern_flow_attr); 3340 return err; 3341 } 3342 3343 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3344 { 3345 struct ib_uverbs_destroy_flow cmd; 3346 int ret; 3347 3348 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3349 if (ret) 3350 return ret; 3351 3352 if (cmd.comp_mask) 3353 return -EINVAL; 3354 3355 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3356 } 3357 3358 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3359 struct ib_uverbs_create_xsrq *cmd, 3360 struct ib_udata *udata) 3361 { 3362 struct ib_uverbs_create_srq_resp resp = {}; 3363 struct ib_usrq_object *obj; 3364 struct ib_pd *pd; 3365 struct ib_srq *srq; 3366 struct ib_srq_init_attr attr; 3367 int ret; 3368 struct ib_uobject *xrcd_uobj; 3369 struct ib_device *ib_dev; 3370 3371 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3372 &ib_dev); 3373 if (IS_ERR(obj)) 3374 return PTR_ERR(obj); 3375 3376 if (cmd->srq_type == IB_SRQT_TM) 3377 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3378 3379 if (cmd->srq_type == IB_SRQT_XRC) { 3380 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3381 attrs); 3382 if (IS_ERR(xrcd_uobj)) { 3383 ret = -EINVAL; 3384 goto err; 3385 } 3386 3387 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3388 if (!attr.ext.xrc.xrcd) { 3389 ret = -EINVAL; 3390 goto err_put_xrcd; 3391 } 3392 3393 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3394 atomic_inc(&obj->uxrcd->refcnt); 3395 } 3396 3397 if (ib_srq_has_cq(cmd->srq_type)) { 3398 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3399 cmd->cq_handle, attrs); 3400 if (!attr.ext.cq) { 3401 ret = -EINVAL; 3402 goto err_put_xrcd; 3403 } 3404 } 3405 3406 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3407 if (!pd) { 3408 ret = -EINVAL; 3409 goto err_put_cq; 3410 } 3411 3412 attr.event_handler = ib_uverbs_srq_event_handler; 3413 attr.srq_type = cmd->srq_type; 3414 attr.attr.max_wr = cmd->max_wr; 3415 attr.attr.max_sge = cmd->max_sge; 3416 attr.attr.srq_limit = cmd->srq_limit; 3417 3418 INIT_LIST_HEAD(&obj->uevent.event_list); 3419 obj->uevent.uobject.user_handle = cmd->user_handle; 3420 3421 srq = ib_create_srq_user(pd, &attr, obj, udata); 3422 if (IS_ERR(srq)) { 3423 ret = PTR_ERR(srq); 3424 goto err_put_pd; 3425 } 3426 3427 obj->uevent.uobject.object = srq; 3428 obj->uevent.uobject.user_handle = cmd->user_handle; 3429 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 3430 if (obj->uevent.event_file) 3431 uverbs_uobject_get(&obj->uevent.event_file->uobj); 3432 3433 if (cmd->srq_type == IB_SRQT_XRC) 3434 resp.srqn = srq->ext.xrc.srq_num; 3435 3436 if (cmd->srq_type == IB_SRQT_XRC) 3437 uobj_put_read(xrcd_uobj); 3438 3439 if (ib_srq_has_cq(cmd->srq_type)) 3440 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3441 UVERBS_LOOKUP_READ); 3442 3443 uobj_put_obj_read(pd); 3444 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 3445 3446 resp.srq_handle = obj->uevent.uobject.id; 3447 resp.max_wr = attr.attr.max_wr; 3448 resp.max_sge = attr.attr.max_sge; 3449 return uverbs_response(attrs, &resp, sizeof(resp)); 3450 3451 err_put_pd: 3452 uobj_put_obj_read(pd); 3453 err_put_cq: 3454 if (ib_srq_has_cq(cmd->srq_type)) 3455 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3456 UVERBS_LOOKUP_READ); 3457 3458 err_put_xrcd: 3459 if (cmd->srq_type == IB_SRQT_XRC) { 3460 atomic_dec(&obj->uxrcd->refcnt); 3461 uobj_put_read(xrcd_uobj); 3462 } 3463 3464 err: 3465 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3466 return ret; 3467 } 3468 3469 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3470 { 3471 struct ib_uverbs_create_srq cmd; 3472 struct ib_uverbs_create_xsrq xcmd; 3473 int ret; 3474 3475 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3476 if (ret) 3477 return ret; 3478 3479 memset(&xcmd, 0, sizeof(xcmd)); 3480 xcmd.response = cmd.response; 3481 xcmd.user_handle = cmd.user_handle; 3482 xcmd.srq_type = IB_SRQT_BASIC; 3483 xcmd.pd_handle = cmd.pd_handle; 3484 xcmd.max_wr = cmd.max_wr; 3485 xcmd.max_sge = cmd.max_sge; 3486 xcmd.srq_limit = cmd.srq_limit; 3487 3488 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3489 } 3490 3491 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3492 { 3493 struct ib_uverbs_create_xsrq cmd; 3494 int ret; 3495 3496 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3497 if (ret) 3498 return ret; 3499 3500 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3501 } 3502 3503 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3504 { 3505 struct ib_uverbs_modify_srq cmd; 3506 struct ib_srq *srq; 3507 struct ib_srq_attr attr; 3508 int ret; 3509 3510 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3511 if (ret) 3512 return ret; 3513 3514 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3515 if (!srq) 3516 return -EINVAL; 3517 3518 attr.max_wr = cmd.max_wr; 3519 attr.srq_limit = cmd.srq_limit; 3520 3521 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3522 &attrs->driver_udata); 3523 3524 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3525 UVERBS_LOOKUP_READ); 3526 3527 return ret; 3528 } 3529 3530 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3531 { 3532 struct ib_uverbs_query_srq cmd; 3533 struct ib_uverbs_query_srq_resp resp; 3534 struct ib_srq_attr attr; 3535 struct ib_srq *srq; 3536 int ret; 3537 3538 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3539 if (ret) 3540 return ret; 3541 3542 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3543 if (!srq) 3544 return -EINVAL; 3545 3546 ret = ib_query_srq(srq, &attr); 3547 3548 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3549 UVERBS_LOOKUP_READ); 3550 3551 if (ret) 3552 return ret; 3553 3554 memset(&resp, 0, sizeof resp); 3555 3556 resp.max_wr = attr.max_wr; 3557 resp.max_sge = attr.max_sge; 3558 resp.srq_limit = attr.srq_limit; 3559 3560 return uverbs_response(attrs, &resp, sizeof(resp)); 3561 } 3562 3563 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3564 { 3565 struct ib_uverbs_destroy_srq cmd; 3566 struct ib_uverbs_destroy_srq_resp resp; 3567 struct ib_uobject *uobj; 3568 struct ib_uevent_object *obj; 3569 int ret; 3570 3571 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3572 if (ret) 3573 return ret; 3574 3575 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3576 if (IS_ERR(uobj)) 3577 return PTR_ERR(uobj); 3578 3579 obj = container_of(uobj, struct ib_uevent_object, uobject); 3580 memset(&resp, 0, sizeof(resp)); 3581 resp.events_reported = obj->events_reported; 3582 3583 uobj_put_destroy(uobj); 3584 3585 return uverbs_response(attrs, &resp, sizeof(resp)); 3586 } 3587 3588 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3589 { 3590 struct ib_uverbs_ex_query_device_resp resp = {}; 3591 struct ib_uverbs_ex_query_device cmd; 3592 struct ib_device_attr attr = {0}; 3593 struct ib_ucontext *ucontext; 3594 struct ib_device *ib_dev; 3595 int err; 3596 3597 ucontext = ib_uverbs_get_ucontext(attrs); 3598 if (IS_ERR(ucontext)) 3599 return PTR_ERR(ucontext); 3600 ib_dev = ucontext->device; 3601 3602 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3603 if (err) 3604 return err; 3605 3606 if (cmd.comp_mask) 3607 return -EINVAL; 3608 3609 if (cmd.reserved) 3610 return -EINVAL; 3611 3612 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3613 if (err) 3614 return err; 3615 3616 copy_query_dev_fields(ucontext, &resp.base, &attr); 3617 3618 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3619 resp.odp_caps.per_transport_caps.rc_odp_caps = 3620 attr.odp_caps.per_transport_caps.rc_odp_caps; 3621 resp.odp_caps.per_transport_caps.uc_odp_caps = 3622 attr.odp_caps.per_transport_caps.uc_odp_caps; 3623 resp.odp_caps.per_transport_caps.ud_odp_caps = 3624 attr.odp_caps.per_transport_caps.ud_odp_caps; 3625 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3626 3627 resp.timestamp_mask = attr.timestamp_mask; 3628 resp.hca_core_clock = attr.hca_core_clock; 3629 resp.device_cap_flags_ex = attr.device_cap_flags; 3630 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3631 resp.rss_caps.max_rwq_indirection_tables = 3632 attr.rss_caps.max_rwq_indirection_tables; 3633 resp.rss_caps.max_rwq_indirection_table_size = 3634 attr.rss_caps.max_rwq_indirection_table_size; 3635 resp.max_wq_type_rq = attr.max_wq_type_rq; 3636 resp.raw_packet_caps = attr.raw_packet_caps; 3637 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3638 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3639 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3640 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3641 resp.tm_caps.flags = attr.tm_caps.flags; 3642 resp.cq_moderation_caps.max_cq_moderation_count = 3643 attr.cq_caps.max_cq_moderation_count; 3644 resp.cq_moderation_caps.max_cq_moderation_period = 3645 attr.cq_caps.max_cq_moderation_period; 3646 resp.max_dm_size = attr.max_dm_size; 3647 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3648 3649 return uverbs_response(attrs, &resp, sizeof(resp)); 3650 } 3651 3652 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3653 { 3654 struct ib_uverbs_ex_modify_cq cmd; 3655 struct ib_cq *cq; 3656 int ret; 3657 3658 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3659 if (ret) 3660 return ret; 3661 3662 if (!cmd.attr_mask || cmd.reserved) 3663 return -EINVAL; 3664 3665 if (cmd.attr_mask > IB_CQ_MODERATE) 3666 return -EOPNOTSUPP; 3667 3668 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3669 if (!cq) 3670 return -EINVAL; 3671 3672 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3673 3674 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3675 UVERBS_LOOKUP_READ); 3676 return ret; 3677 } 3678 3679 /* 3680 * Describe the input structs for write(). Some write methods have an input 3681 * only struct, most have an input and output. If the struct has an output then 3682 * the 'response' u64 must be the first field in the request structure. 3683 * 3684 * If udata is present then both the request and response structs have a 3685 * trailing driver_data flex array. In this case the size of the base struct 3686 * cannot be changed. 3687 */ 3688 #define UAPI_DEF_WRITE_IO(req, resp) \ 3689 .write.has_resp = 1 + \ 3690 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3691 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \ 3692 sizeof(u64)), \ 3693 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3694 3695 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3696 3697 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3698 UAPI_DEF_WRITE_IO(req, resp), \ 3699 .write.has_udata = \ 3700 1 + \ 3701 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3702 sizeof(req)) + \ 3703 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3704 sizeof(resp)) 3705 3706 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3707 UAPI_DEF_WRITE_I(req), \ 3708 .write.has_udata = \ 3709 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3710 sizeof(req)) 3711 3712 /* 3713 * The _EX versions are for use with WRITE_EX and allow the last struct member 3714 * to be specified. Buffers that do not include that member will be rejected. 3715 */ 3716 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3717 .write.has_resp = 1, \ 3718 .write.req_size = offsetofend(req, req_last_member), \ 3719 .write.resp_size = offsetofend(resp, resp_last_member) 3720 3721 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3722 .write.req_size = offsetofend(req, req_last_member) 3723 3724 const struct uapi_definition uverbs_def_write_intf[] = { 3725 DECLARE_UVERBS_OBJECT( 3726 UVERBS_OBJECT_AH, 3727 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3728 ib_uverbs_create_ah, 3729 UAPI_DEF_WRITE_UDATA_IO( 3730 struct ib_uverbs_create_ah, 3731 struct ib_uverbs_create_ah_resp)), 3732 DECLARE_UVERBS_WRITE( 3733 IB_USER_VERBS_CMD_DESTROY_AH, 3734 ib_uverbs_destroy_ah, 3735 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)), 3736 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah), 3737 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)), 3738 3739 DECLARE_UVERBS_OBJECT( 3740 UVERBS_OBJECT_COMP_CHANNEL, 3741 DECLARE_UVERBS_WRITE( 3742 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3743 ib_uverbs_create_comp_channel, 3744 UAPI_DEF_WRITE_IO( 3745 struct ib_uverbs_create_comp_channel, 3746 struct ib_uverbs_create_comp_channel_resp))), 3747 3748 DECLARE_UVERBS_OBJECT( 3749 UVERBS_OBJECT_CQ, 3750 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3751 ib_uverbs_create_cq, 3752 UAPI_DEF_WRITE_UDATA_IO( 3753 struct ib_uverbs_create_cq, 3754 struct ib_uverbs_create_cq_resp), 3755 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3756 DECLARE_UVERBS_WRITE( 3757 IB_USER_VERBS_CMD_DESTROY_CQ, 3758 ib_uverbs_destroy_cq, 3759 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3760 struct ib_uverbs_destroy_cq_resp), 3761 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3762 DECLARE_UVERBS_WRITE( 3763 IB_USER_VERBS_CMD_POLL_CQ, 3764 ib_uverbs_poll_cq, 3765 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3766 struct ib_uverbs_poll_cq_resp), 3767 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3768 DECLARE_UVERBS_WRITE( 3769 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3770 ib_uverbs_req_notify_cq, 3771 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3772 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3773 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3774 ib_uverbs_resize_cq, 3775 UAPI_DEF_WRITE_UDATA_IO( 3776 struct ib_uverbs_resize_cq, 3777 struct ib_uverbs_resize_cq_resp), 3778 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3779 DECLARE_UVERBS_WRITE_EX( 3780 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3781 ib_uverbs_ex_create_cq, 3782 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3783 reserved, 3784 struct ib_uverbs_ex_create_cq_resp, 3785 response_length), 3786 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3787 DECLARE_UVERBS_WRITE_EX( 3788 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3789 ib_uverbs_ex_modify_cq, 3790 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3791 UAPI_DEF_METHOD_NEEDS_FN(modify_cq))), 3792 3793 DECLARE_UVERBS_OBJECT( 3794 UVERBS_OBJECT_DEVICE, 3795 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3796 ib_uverbs_get_context, 3797 UAPI_DEF_WRITE_UDATA_IO( 3798 struct ib_uverbs_get_context, 3799 struct ib_uverbs_get_context_resp)), 3800 DECLARE_UVERBS_WRITE( 3801 IB_USER_VERBS_CMD_QUERY_DEVICE, 3802 ib_uverbs_query_device, 3803 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3804 struct ib_uverbs_query_device_resp)), 3805 DECLARE_UVERBS_WRITE( 3806 IB_USER_VERBS_CMD_QUERY_PORT, 3807 ib_uverbs_query_port, 3808 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3809 struct ib_uverbs_query_port_resp), 3810 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3811 DECLARE_UVERBS_WRITE_EX( 3812 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3813 ib_uverbs_ex_query_device, 3814 UAPI_DEF_WRITE_IO_EX( 3815 struct ib_uverbs_ex_query_device, 3816 reserved, 3817 struct ib_uverbs_ex_query_device_resp, 3818 response_length), 3819 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3820 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3821 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3822 3823 DECLARE_UVERBS_OBJECT( 3824 UVERBS_OBJECT_FLOW, 3825 DECLARE_UVERBS_WRITE_EX( 3826 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3827 ib_uverbs_ex_create_flow, 3828 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3829 flow_attr, 3830 struct ib_uverbs_create_flow_resp, 3831 flow_handle), 3832 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3833 DECLARE_UVERBS_WRITE_EX( 3834 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3835 ib_uverbs_ex_destroy_flow, 3836 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3837 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3838 3839 DECLARE_UVERBS_OBJECT( 3840 UVERBS_OBJECT_MR, 3841 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3842 ib_uverbs_dereg_mr, 3843 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3844 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3845 DECLARE_UVERBS_WRITE( 3846 IB_USER_VERBS_CMD_REG_MR, 3847 ib_uverbs_reg_mr, 3848 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3849 struct ib_uverbs_reg_mr_resp), 3850 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3851 DECLARE_UVERBS_WRITE( 3852 IB_USER_VERBS_CMD_REREG_MR, 3853 ib_uverbs_rereg_mr, 3854 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3855 struct ib_uverbs_rereg_mr_resp), 3856 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3857 3858 DECLARE_UVERBS_OBJECT( 3859 UVERBS_OBJECT_MW, 3860 DECLARE_UVERBS_WRITE( 3861 IB_USER_VERBS_CMD_ALLOC_MW, 3862 ib_uverbs_alloc_mw, 3863 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3864 struct ib_uverbs_alloc_mw_resp), 3865 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3866 DECLARE_UVERBS_WRITE( 3867 IB_USER_VERBS_CMD_DEALLOC_MW, 3868 ib_uverbs_dealloc_mw, 3869 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3870 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3871 3872 DECLARE_UVERBS_OBJECT( 3873 UVERBS_OBJECT_PD, 3874 DECLARE_UVERBS_WRITE( 3875 IB_USER_VERBS_CMD_ALLOC_PD, 3876 ib_uverbs_alloc_pd, 3877 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3878 struct ib_uverbs_alloc_pd_resp), 3879 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3880 DECLARE_UVERBS_WRITE( 3881 IB_USER_VERBS_CMD_DEALLOC_PD, 3882 ib_uverbs_dealloc_pd, 3883 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3884 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3885 3886 DECLARE_UVERBS_OBJECT( 3887 UVERBS_OBJECT_QP, 3888 DECLARE_UVERBS_WRITE( 3889 IB_USER_VERBS_CMD_ATTACH_MCAST, 3890 ib_uverbs_attach_mcast, 3891 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3892 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3893 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3894 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3895 ib_uverbs_create_qp, 3896 UAPI_DEF_WRITE_UDATA_IO( 3897 struct ib_uverbs_create_qp, 3898 struct ib_uverbs_create_qp_resp), 3899 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3900 DECLARE_UVERBS_WRITE( 3901 IB_USER_VERBS_CMD_DESTROY_QP, 3902 ib_uverbs_destroy_qp, 3903 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3904 struct ib_uverbs_destroy_qp_resp), 3905 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3906 DECLARE_UVERBS_WRITE( 3907 IB_USER_VERBS_CMD_DETACH_MCAST, 3908 ib_uverbs_detach_mcast, 3909 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3910 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3911 DECLARE_UVERBS_WRITE( 3912 IB_USER_VERBS_CMD_MODIFY_QP, 3913 ib_uverbs_modify_qp, 3914 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3915 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3916 DECLARE_UVERBS_WRITE( 3917 IB_USER_VERBS_CMD_POST_RECV, 3918 ib_uverbs_post_recv, 3919 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3920 struct ib_uverbs_post_recv_resp), 3921 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3922 DECLARE_UVERBS_WRITE( 3923 IB_USER_VERBS_CMD_POST_SEND, 3924 ib_uverbs_post_send, 3925 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3926 struct ib_uverbs_post_send_resp), 3927 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3928 DECLARE_UVERBS_WRITE( 3929 IB_USER_VERBS_CMD_QUERY_QP, 3930 ib_uverbs_query_qp, 3931 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3932 struct ib_uverbs_query_qp_resp), 3933 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3934 DECLARE_UVERBS_WRITE_EX( 3935 IB_USER_VERBS_EX_CMD_CREATE_QP, 3936 ib_uverbs_ex_create_qp, 3937 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3938 comp_mask, 3939 struct ib_uverbs_ex_create_qp_resp, 3940 response_length), 3941 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3942 DECLARE_UVERBS_WRITE_EX( 3943 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3944 ib_uverbs_ex_modify_qp, 3945 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3946 base, 3947 struct ib_uverbs_ex_modify_qp_resp, 3948 response_length), 3949 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3950 3951 DECLARE_UVERBS_OBJECT( 3952 UVERBS_OBJECT_RWQ_IND_TBL, 3953 DECLARE_UVERBS_WRITE_EX( 3954 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3955 ib_uverbs_ex_create_rwq_ind_table, 3956 UAPI_DEF_WRITE_IO_EX( 3957 struct ib_uverbs_ex_create_rwq_ind_table, 3958 log_ind_tbl_size, 3959 struct ib_uverbs_ex_create_rwq_ind_table_resp, 3960 ind_tbl_num), 3961 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 3962 DECLARE_UVERBS_WRITE_EX( 3963 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 3964 ib_uverbs_ex_destroy_rwq_ind_table, 3965 UAPI_DEF_WRITE_I( 3966 struct ib_uverbs_ex_destroy_rwq_ind_table), 3967 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 3968 3969 DECLARE_UVERBS_OBJECT( 3970 UVERBS_OBJECT_WQ, 3971 DECLARE_UVERBS_WRITE_EX( 3972 IB_USER_VERBS_EX_CMD_CREATE_WQ, 3973 ib_uverbs_ex_create_wq, 3974 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 3975 max_sge, 3976 struct ib_uverbs_ex_create_wq_resp, 3977 wqn), 3978 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 3979 DECLARE_UVERBS_WRITE_EX( 3980 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 3981 ib_uverbs_ex_destroy_wq, 3982 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 3983 wq_handle, 3984 struct ib_uverbs_ex_destroy_wq_resp, 3985 reserved), 3986 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 3987 DECLARE_UVERBS_WRITE_EX( 3988 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 3989 ib_uverbs_ex_modify_wq, 3990 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 3991 curr_wq_state), 3992 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 3993 3994 DECLARE_UVERBS_OBJECT( 3995 UVERBS_OBJECT_SRQ, 3996 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 3997 ib_uverbs_create_srq, 3998 UAPI_DEF_WRITE_UDATA_IO( 3999 struct ib_uverbs_create_srq, 4000 struct ib_uverbs_create_srq_resp), 4001 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4002 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 4003 ib_uverbs_create_xsrq, 4004 UAPI_DEF_WRITE_UDATA_IO( 4005 struct ib_uverbs_create_xsrq, 4006 struct ib_uverbs_create_srq_resp), 4007 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4008 DECLARE_UVERBS_WRITE( 4009 IB_USER_VERBS_CMD_DESTROY_SRQ, 4010 ib_uverbs_destroy_srq, 4011 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4012 struct ib_uverbs_destroy_srq_resp), 4013 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4014 DECLARE_UVERBS_WRITE( 4015 IB_USER_VERBS_CMD_MODIFY_SRQ, 4016 ib_uverbs_modify_srq, 4017 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4018 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4019 DECLARE_UVERBS_WRITE( 4020 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4021 ib_uverbs_post_srq_recv, 4022 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4023 struct ib_uverbs_post_srq_recv_resp), 4024 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4025 DECLARE_UVERBS_WRITE( 4026 IB_USER_VERBS_CMD_QUERY_SRQ, 4027 ib_uverbs_query_srq, 4028 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4029 struct ib_uverbs_query_srq_resp), 4030 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4031 4032 DECLARE_UVERBS_OBJECT( 4033 UVERBS_OBJECT_XRCD, 4034 DECLARE_UVERBS_WRITE( 4035 IB_USER_VERBS_CMD_CLOSE_XRCD, 4036 ib_uverbs_close_xrcd, 4037 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)), 4038 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4039 ib_uverbs_open_qp, 4040 UAPI_DEF_WRITE_UDATA_IO( 4041 struct ib_uverbs_open_qp, 4042 struct ib_uverbs_create_qp_resp)), 4043 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4044 ib_uverbs_open_xrcd, 4045 UAPI_DEF_WRITE_UDATA_IO( 4046 struct ib_uverbs_open_xrcd, 4047 struct ib_uverbs_open_xrcd_resp)), 4048 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd), 4049 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)), 4050 4051 {}, 4052 }; 4053