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