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