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 = EMPTY_FD; 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 (fd_empty(f)) { 588 ret = -EBADF; 589 goto err_tree_mutex_unlock; 590 } 591 592 inode = file_inode(fd_file(f)); 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 fdput(f); 636 637 mutex_unlock(&ibudev->xrcd_tree_mutex); 638 uobj_finalize_uobj_create(&obj->uobject, attrs); 639 640 resp.xrcd_handle = obj->uobject.id; 641 return uverbs_response(attrs, &resp, sizeof(resp)); 642 643 err_dealloc_xrcd: 644 ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs)); 645 646 err: 647 uobj_alloc_abort(&obj->uobject, attrs); 648 649 err_tree_mutex_unlock: 650 fdput(f); 651 652 mutex_unlock(&ibudev->xrcd_tree_mutex); 653 654 return ret; 655 } 656 657 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) 658 { 659 struct ib_uverbs_close_xrcd cmd; 660 int ret; 661 662 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 663 if (ret) 664 return ret; 665 666 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); 667 } 668 669 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, 670 enum rdma_remove_reason why, 671 struct uverbs_attr_bundle *attrs) 672 { 673 struct inode *inode; 674 int ret; 675 struct ib_uverbs_device *dev = attrs->ufile->device; 676 677 inode = xrcd->inode; 678 if (inode && !atomic_dec_and_test(&xrcd->usecnt)) 679 return 0; 680 681 ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata); 682 if (ret) { 683 atomic_inc(&xrcd->usecnt); 684 return ret; 685 } 686 687 if (inode) 688 xrcd_table_delete(dev, inode); 689 690 return 0; 691 } 692 693 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) 694 { 695 struct ib_uverbs_reg_mr_resp resp = {}; 696 struct ib_uverbs_reg_mr cmd; 697 struct ib_uobject *uobj; 698 struct ib_pd *pd; 699 struct ib_mr *mr; 700 int ret; 701 struct ib_device *ib_dev; 702 703 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 704 if (ret) 705 return ret; 706 707 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 708 return -EINVAL; 709 710 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 711 if (IS_ERR(uobj)) 712 return PTR_ERR(uobj); 713 714 ret = ib_check_mr_access(ib_dev, cmd.access_flags); 715 if (ret) 716 goto err_free; 717 718 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 719 if (!pd) { 720 ret = -EINVAL; 721 goto err_free; 722 } 723 724 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 725 cmd.access_flags, 726 &attrs->driver_udata); 727 if (IS_ERR(mr)) { 728 ret = PTR_ERR(mr); 729 goto err_put; 730 } 731 732 mr->device = pd->device; 733 mr->pd = pd; 734 mr->type = IB_MR_TYPE_USER; 735 mr->dm = NULL; 736 mr->sig_attrs = NULL; 737 mr->uobject = uobj; 738 atomic_inc(&pd->usecnt); 739 mr->iova = cmd.hca_va; 740 mr->length = cmd.length; 741 742 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 743 rdma_restrack_set_name(&mr->res, NULL); 744 rdma_restrack_add(&mr->res); 745 746 uobj->object = mr; 747 uobj_put_obj_read(pd); 748 uobj_finalize_uobj_create(uobj, attrs); 749 750 resp.lkey = mr->lkey; 751 resp.rkey = mr->rkey; 752 resp.mr_handle = uobj->id; 753 return uverbs_response(attrs, &resp, sizeof(resp)); 754 755 err_put: 756 uobj_put_obj_read(pd); 757 err_free: 758 uobj_alloc_abort(uobj, attrs); 759 return ret; 760 } 761 762 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 763 { 764 struct ib_uverbs_rereg_mr cmd; 765 struct ib_uverbs_rereg_mr_resp resp; 766 struct ib_mr *mr; 767 int ret; 768 struct ib_uobject *uobj; 769 struct ib_uobject *new_uobj; 770 struct ib_device *ib_dev; 771 struct ib_pd *orig_pd; 772 struct ib_pd *new_pd; 773 struct ib_mr *new_mr; 774 775 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 776 if (ret) 777 return ret; 778 779 if (!cmd.flags) 780 return -EINVAL; 781 782 if (cmd.flags & ~IB_MR_REREG_SUPPORTED) 783 return -EOPNOTSUPP; 784 785 if ((cmd.flags & IB_MR_REREG_TRANS) && 786 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 787 return -EINVAL; 788 789 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 790 if (IS_ERR(uobj)) 791 return PTR_ERR(uobj); 792 793 mr = uobj->object; 794 795 if (mr->dm) { 796 ret = -EINVAL; 797 goto put_uobjs; 798 } 799 800 if (cmd.flags & IB_MR_REREG_ACCESS) { 801 ret = ib_check_mr_access(mr->device, cmd.access_flags); 802 if (ret) 803 goto put_uobjs; 804 } 805 806 orig_pd = mr->pd; 807 if (cmd.flags & IB_MR_REREG_PD) { 808 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 809 attrs); 810 if (!new_pd) { 811 ret = -EINVAL; 812 goto put_uobjs; 813 } 814 } else { 815 new_pd = mr->pd; 816 } 817 818 /* 819 * The driver might create a new HW object as part of the rereg, we need 820 * to have a uobject ready to hold it. 821 */ 822 new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 823 if (IS_ERR(new_uobj)) { 824 ret = PTR_ERR(new_uobj); 825 goto put_uobj_pd; 826 } 827 828 new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length, 829 cmd.hca_va, cmd.access_flags, new_pd, 830 &attrs->driver_udata); 831 if (IS_ERR(new_mr)) { 832 ret = PTR_ERR(new_mr); 833 goto put_new_uobj; 834 } 835 if (new_mr) { 836 new_mr->device = new_pd->device; 837 new_mr->pd = new_pd; 838 new_mr->type = IB_MR_TYPE_USER; 839 new_mr->uobject = uobj; 840 atomic_inc(&new_pd->usecnt); 841 new_uobj->object = new_mr; 842 843 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR); 844 rdma_restrack_set_name(&new_mr->res, NULL); 845 rdma_restrack_add(&new_mr->res); 846 847 /* 848 * The new uobj for the new HW object is put into the same spot 849 * in the IDR and the old uobj & HW object is deleted. 850 */ 851 rdma_assign_uobject(uobj, new_uobj, attrs); 852 rdma_alloc_commit_uobject(new_uobj, attrs); 853 uobj_put_destroy(uobj); 854 new_uobj = NULL; 855 uobj = NULL; 856 mr = new_mr; 857 } else { 858 if (cmd.flags & IB_MR_REREG_PD) { 859 atomic_dec(&orig_pd->usecnt); 860 mr->pd = new_pd; 861 atomic_inc(&new_pd->usecnt); 862 } 863 if (cmd.flags & IB_MR_REREG_TRANS) { 864 mr->iova = cmd.hca_va; 865 mr->length = cmd.length; 866 } 867 } 868 869 memset(&resp, 0, sizeof(resp)); 870 resp.lkey = mr->lkey; 871 resp.rkey = mr->rkey; 872 873 ret = uverbs_response(attrs, &resp, sizeof(resp)); 874 875 put_new_uobj: 876 if (new_uobj) 877 uobj_alloc_abort(new_uobj, attrs); 878 put_uobj_pd: 879 if (cmd.flags & IB_MR_REREG_PD) 880 uobj_put_obj_read(new_pd); 881 882 put_uobjs: 883 if (uobj) 884 uobj_put_write(uobj); 885 886 return ret; 887 } 888 889 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) 890 { 891 struct ib_uverbs_dereg_mr cmd; 892 int ret; 893 894 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 895 if (ret) 896 return ret; 897 898 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 899 } 900 901 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 902 { 903 struct ib_uverbs_alloc_mw cmd; 904 struct ib_uverbs_alloc_mw_resp resp = {}; 905 struct ib_uobject *uobj; 906 struct ib_pd *pd; 907 struct ib_mw *mw; 908 int ret; 909 struct ib_device *ib_dev; 910 911 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 912 if (ret) 913 return ret; 914 915 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 916 if (IS_ERR(uobj)) 917 return PTR_ERR(uobj); 918 919 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 920 if (!pd) { 921 ret = -EINVAL; 922 goto err_free; 923 } 924 925 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 926 ret = -EINVAL; 927 goto err_put; 928 } 929 930 mw = rdma_zalloc_drv_obj(ib_dev, ib_mw); 931 if (!mw) { 932 ret = -ENOMEM; 933 goto err_put; 934 } 935 936 mw->device = ib_dev; 937 mw->pd = pd; 938 mw->uobject = uobj; 939 mw->type = cmd.mw_type; 940 941 ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata); 942 if (ret) 943 goto err_alloc; 944 945 atomic_inc(&pd->usecnt); 946 947 uobj->object = mw; 948 uobj_put_obj_read(pd); 949 uobj_finalize_uobj_create(uobj, attrs); 950 951 resp.rkey = mw->rkey; 952 resp.mw_handle = uobj->id; 953 return uverbs_response(attrs, &resp, sizeof(resp)); 954 955 err_alloc: 956 kfree(mw); 957 err_put: 958 uobj_put_obj_read(pd); 959 err_free: 960 uobj_alloc_abort(uobj, attrs); 961 return ret; 962 } 963 964 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) 965 { 966 struct ib_uverbs_dealloc_mw cmd; 967 int ret; 968 969 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 970 if (ret) 971 return ret; 972 973 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); 974 } 975 976 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) 977 { 978 struct ib_uverbs_create_comp_channel cmd; 979 struct ib_uverbs_create_comp_channel_resp resp; 980 struct ib_uobject *uobj; 981 struct ib_uverbs_completion_event_file *ev_file; 982 struct ib_device *ib_dev; 983 int ret; 984 985 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 986 if (ret) 987 return ret; 988 989 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); 990 if (IS_ERR(uobj)) 991 return PTR_ERR(uobj); 992 993 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, 994 uobj); 995 ib_uverbs_init_event_queue(&ev_file->ev_queue); 996 uobj_finalize_uobj_create(uobj, attrs); 997 998 resp.fd = uobj->id; 999 return uverbs_response(attrs, &resp, sizeof(resp)); 1000 } 1001 1002 static int create_cq(struct uverbs_attr_bundle *attrs, 1003 struct ib_uverbs_ex_create_cq *cmd) 1004 { 1005 struct ib_ucq_object *obj; 1006 struct ib_uverbs_completion_event_file *ev_file = NULL; 1007 struct ib_cq *cq; 1008 int ret; 1009 struct ib_uverbs_ex_create_cq_resp resp = {}; 1010 struct ib_cq_init_attr attr = {}; 1011 struct ib_device *ib_dev; 1012 1013 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) 1014 return -EINVAL; 1015 1016 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, 1017 &ib_dev); 1018 if (IS_ERR(obj)) 1019 return PTR_ERR(obj); 1020 1021 if (cmd->comp_channel >= 0) { 1022 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); 1023 if (IS_ERR(ev_file)) { 1024 ret = PTR_ERR(ev_file); 1025 goto err; 1026 } 1027 } 1028 1029 obj->uevent.uobject.user_handle = cmd->user_handle; 1030 INIT_LIST_HEAD(&obj->comp_list); 1031 INIT_LIST_HEAD(&obj->uevent.event_list); 1032 1033 attr.cqe = cmd->cqe; 1034 attr.comp_vector = cmd->comp_vector; 1035 attr.flags = cmd->flags; 1036 1037 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 1038 if (!cq) { 1039 ret = -ENOMEM; 1040 goto err_file; 1041 } 1042 cq->device = ib_dev; 1043 cq->uobject = obj; 1044 cq->comp_handler = ib_uverbs_comp_handler; 1045 cq->event_handler = ib_uverbs_cq_event_handler; 1046 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 1047 atomic_set(&cq->usecnt, 0); 1048 1049 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ); 1050 rdma_restrack_set_name(&cq->res, NULL); 1051 1052 ret = ib_dev->ops.create_cq(cq, &attr, attrs); 1053 if (ret) 1054 goto err_free; 1055 rdma_restrack_add(&cq->res); 1056 1057 obj->uevent.uobject.object = cq; 1058 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1059 if (obj->uevent.event_file) 1060 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1061 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1062 1063 resp.base.cq_handle = obj->uevent.uobject.id; 1064 resp.base.cqe = cq->cqe; 1065 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1066 return uverbs_response(attrs, &resp, sizeof(resp)); 1067 1068 err_free: 1069 rdma_restrack_put(&cq->res); 1070 kfree(cq); 1071 err_file: 1072 if (ev_file) 1073 ib_uverbs_release_ucq(ev_file, obj); 1074 err: 1075 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1076 return ret; 1077 } 1078 1079 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) 1080 { 1081 struct ib_uverbs_create_cq cmd; 1082 struct ib_uverbs_ex_create_cq cmd_ex; 1083 int ret; 1084 1085 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1086 if (ret) 1087 return ret; 1088 1089 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1090 cmd_ex.user_handle = cmd.user_handle; 1091 cmd_ex.cqe = cmd.cqe; 1092 cmd_ex.comp_vector = cmd.comp_vector; 1093 cmd_ex.comp_channel = cmd.comp_channel; 1094 1095 return create_cq(attrs, &cmd_ex); 1096 } 1097 1098 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) 1099 { 1100 struct ib_uverbs_ex_create_cq cmd; 1101 int ret; 1102 1103 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1104 if (ret) 1105 return ret; 1106 1107 if (cmd.comp_mask) 1108 return -EINVAL; 1109 1110 if (cmd.reserved) 1111 return -EINVAL; 1112 1113 return create_cq(attrs, &cmd); 1114 } 1115 1116 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) 1117 { 1118 struct ib_uverbs_resize_cq cmd; 1119 struct ib_uverbs_resize_cq_resp resp = {}; 1120 struct ib_cq *cq; 1121 int ret; 1122 1123 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1124 if (ret) 1125 return ret; 1126 1127 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1128 if (!cq) 1129 return -EINVAL; 1130 1131 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); 1132 if (ret) 1133 goto out; 1134 1135 resp.cqe = cq->cqe; 1136 1137 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1138 out: 1139 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1140 UVERBS_LOOKUP_READ); 1141 1142 return ret; 1143 } 1144 1145 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1146 struct ib_wc *wc) 1147 { 1148 struct ib_uverbs_wc tmp; 1149 1150 tmp.wr_id = wc->wr_id; 1151 tmp.status = wc->status; 1152 tmp.opcode = wc->opcode; 1153 tmp.vendor_err = wc->vendor_err; 1154 tmp.byte_len = wc->byte_len; 1155 tmp.ex.imm_data = wc->ex.imm_data; 1156 tmp.qp_num = wc->qp->qp_num; 1157 tmp.src_qp = wc->src_qp; 1158 tmp.wc_flags = wc->wc_flags; 1159 tmp.pkey_index = wc->pkey_index; 1160 if (rdma_cap_opa_ah(ib_dev, wc->port_num)) 1161 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); 1162 else 1163 tmp.slid = ib_lid_cpu16(wc->slid); 1164 tmp.sl = wc->sl; 1165 tmp.dlid_path_bits = wc->dlid_path_bits; 1166 tmp.port_num = wc->port_num; 1167 tmp.reserved = 0; 1168 1169 if (copy_to_user(dest, &tmp, sizeof tmp)) 1170 return -EFAULT; 1171 1172 return 0; 1173 } 1174 1175 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1176 { 1177 struct ib_uverbs_poll_cq cmd; 1178 struct ib_uverbs_poll_cq_resp resp; 1179 u8 __user *header_ptr; 1180 u8 __user *data_ptr; 1181 struct ib_cq *cq; 1182 struct ib_wc wc; 1183 int ret; 1184 1185 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1186 if (ret) 1187 return ret; 1188 1189 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1190 if (!cq) 1191 return -EINVAL; 1192 1193 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1194 header_ptr = attrs->ucore.outbuf; 1195 data_ptr = header_ptr + sizeof resp; 1196 1197 memset(&resp, 0, sizeof resp); 1198 while (resp.count < cmd.ne) { 1199 ret = ib_poll_cq(cq, 1, &wc); 1200 if (ret < 0) 1201 goto out_put; 1202 if (!ret) 1203 break; 1204 1205 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1206 if (ret) 1207 goto out_put; 1208 1209 data_ptr += sizeof(struct ib_uverbs_wc); 1210 ++resp.count; 1211 } 1212 1213 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1214 ret = -EFAULT; 1215 goto out_put; 1216 } 1217 ret = 0; 1218 1219 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1220 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1221 1222 out_put: 1223 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1224 UVERBS_LOOKUP_READ); 1225 return ret; 1226 } 1227 1228 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1229 { 1230 struct ib_uverbs_req_notify_cq cmd; 1231 struct ib_cq *cq; 1232 int ret; 1233 1234 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1235 if (ret) 1236 return ret; 1237 1238 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1239 if (!cq) 1240 return -EINVAL; 1241 1242 ib_req_notify_cq(cq, cmd.solicited_only ? 1243 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1244 1245 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1246 UVERBS_LOOKUP_READ); 1247 return 0; 1248 } 1249 1250 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1251 { 1252 struct ib_uverbs_destroy_cq cmd; 1253 struct ib_uverbs_destroy_cq_resp resp; 1254 struct ib_uobject *uobj; 1255 struct ib_ucq_object *obj; 1256 int ret; 1257 1258 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1259 if (ret) 1260 return ret; 1261 1262 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1263 if (IS_ERR(uobj)) 1264 return PTR_ERR(uobj); 1265 1266 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject); 1267 memset(&resp, 0, sizeof(resp)); 1268 resp.comp_events_reported = obj->comp_events_reported; 1269 resp.async_events_reported = obj->uevent.events_reported; 1270 1271 uobj_put_destroy(uobj); 1272 1273 return uverbs_response(attrs, &resp, sizeof(resp)); 1274 } 1275 1276 static int create_qp(struct uverbs_attr_bundle *attrs, 1277 struct ib_uverbs_ex_create_qp *cmd) 1278 { 1279 struct ib_uqp_object *obj; 1280 struct ib_device *device; 1281 struct ib_pd *pd = NULL; 1282 struct ib_xrcd *xrcd = NULL; 1283 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1284 struct ib_cq *scq = NULL, *rcq = NULL; 1285 struct ib_srq *srq = NULL; 1286 struct ib_qp *qp; 1287 struct ib_qp_init_attr attr = {}; 1288 struct ib_uverbs_ex_create_qp_resp resp = {}; 1289 int ret; 1290 struct ib_rwq_ind_table *ind_tbl = NULL; 1291 bool has_sq = true; 1292 struct ib_device *ib_dev; 1293 1294 switch (cmd->qp_type) { 1295 case IB_QPT_RAW_PACKET: 1296 if (!capable(CAP_NET_RAW)) 1297 return -EPERM; 1298 break; 1299 case IB_QPT_RC: 1300 case IB_QPT_UC: 1301 case IB_QPT_UD: 1302 case IB_QPT_XRC_INI: 1303 case IB_QPT_XRC_TGT: 1304 case IB_QPT_DRIVER: 1305 break; 1306 default: 1307 return -EINVAL; 1308 } 1309 1310 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1311 &ib_dev); 1312 if (IS_ERR(obj)) 1313 return PTR_ERR(obj); 1314 obj->uxrcd = NULL; 1315 obj->uevent.uobject.user_handle = cmd->user_handle; 1316 mutex_init(&obj->mcast_lock); 1317 1318 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1319 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1320 UVERBS_OBJECT_RWQ_IND_TBL, 1321 cmd->rwq_ind_tbl_handle, attrs); 1322 if (!ind_tbl) { 1323 ret = -EINVAL; 1324 goto err_put; 1325 } 1326 1327 attr.rwq_ind_tbl = ind_tbl; 1328 } 1329 1330 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1331 ret = -EINVAL; 1332 goto err_put; 1333 } 1334 1335 if (ind_tbl && !cmd->max_send_wr) 1336 has_sq = false; 1337 1338 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1339 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1340 attrs); 1341 1342 if (IS_ERR(xrcd_uobj)) { 1343 ret = -EINVAL; 1344 goto err_put; 1345 } 1346 1347 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1348 if (!xrcd) { 1349 ret = -EINVAL; 1350 goto err_put; 1351 } 1352 device = xrcd->device; 1353 } else { 1354 if (cmd->qp_type == IB_QPT_XRC_INI) { 1355 cmd->max_recv_wr = 0; 1356 cmd->max_recv_sge = 0; 1357 } else { 1358 if (cmd->is_srq) { 1359 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1360 cmd->srq_handle, attrs); 1361 if (!srq || srq->srq_type == IB_SRQT_XRC) { 1362 ret = -EINVAL; 1363 goto err_put; 1364 } 1365 } 1366 1367 if (!ind_tbl) { 1368 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1369 rcq = uobj_get_obj_read( 1370 cq, UVERBS_OBJECT_CQ, 1371 cmd->recv_cq_handle, attrs); 1372 if (!rcq) { 1373 ret = -EINVAL; 1374 goto err_put; 1375 } 1376 } 1377 } 1378 } 1379 1380 if (has_sq) 1381 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1382 cmd->send_cq_handle, attrs); 1383 if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI) 1384 rcq = rcq ?: scq; 1385 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1386 attrs); 1387 if (!pd || (!scq && has_sq)) { 1388 ret = -EINVAL; 1389 goto err_put; 1390 } 1391 1392 device = pd->device; 1393 } 1394 1395 attr.event_handler = ib_uverbs_qp_event_handler; 1396 attr.send_cq = scq; 1397 attr.recv_cq = rcq; 1398 attr.srq = srq; 1399 attr.xrcd = xrcd; 1400 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1401 IB_SIGNAL_REQ_WR; 1402 attr.qp_type = cmd->qp_type; 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 if (cmd->base.qkey & IB_QP_SET_QKEY && 1853 !rdma_nl_get_privileged_qkey()) { 1854 ret = -EPERM; 1855 goto release_qp; 1856 } 1857 attr->qkey = cmd->base.qkey; 1858 } 1859 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1860 attr->rq_psn = cmd->base.rq_psn; 1861 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1862 attr->sq_psn = cmd->base.sq_psn; 1863 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1864 attr->dest_qp_num = cmd->base.dest_qp_num; 1865 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1866 attr->qp_access_flags = cmd->base.qp_access_flags; 1867 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1868 attr->pkey_index = cmd->base.pkey_index; 1869 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1870 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1871 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1872 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1873 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1874 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1875 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1876 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1877 if (cmd->base.attr_mask & IB_QP_PORT) 1878 attr->port_num = cmd->base.port_num; 1879 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1880 attr->timeout = cmd->base.timeout; 1881 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1882 attr->retry_cnt = cmd->base.retry_cnt; 1883 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1884 attr->rnr_retry = cmd->base.rnr_retry; 1885 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1886 attr->alt_port_num = cmd->base.alt_port_num; 1887 attr->alt_timeout = cmd->base.alt_timeout; 1888 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1889 } 1890 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1891 attr->rate_limit = cmd->rate_limit; 1892 1893 if (cmd->base.attr_mask & IB_QP_AV) 1894 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1895 &cmd->base.dest); 1896 1897 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1898 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1899 &cmd->base.alt_dest); 1900 1901 ret = ib_modify_qp_with_udata(qp, attr, 1902 modify_qp_mask(qp->qp_type, 1903 cmd->base.attr_mask), 1904 &attrs->driver_udata); 1905 1906 release_qp: 1907 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1908 UVERBS_LOOKUP_READ); 1909 out: 1910 kfree(attr); 1911 1912 return ret; 1913 } 1914 1915 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1916 { 1917 struct ib_uverbs_ex_modify_qp cmd; 1918 int ret; 1919 1920 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1921 if (ret) 1922 return ret; 1923 1924 if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 1925 return -EOPNOTSUPP; 1926 1927 return modify_qp(attrs, &cmd); 1928 } 1929 1930 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1931 { 1932 struct ib_uverbs_ex_modify_qp cmd; 1933 struct ib_uverbs_ex_modify_qp_resp resp = { 1934 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1935 }; 1936 int ret; 1937 1938 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1939 if (ret) 1940 return ret; 1941 1942 /* 1943 * Last bit is reserved for extending the attr_mask by 1944 * using another field. 1945 */ 1946 if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT)) 1947 return -EOPNOTSUPP; 1948 1949 ret = modify_qp(attrs, &cmd); 1950 if (ret) 1951 return ret; 1952 1953 return uverbs_response(attrs, &resp, sizeof(resp)); 1954 } 1955 1956 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1957 { 1958 struct ib_uverbs_destroy_qp cmd; 1959 struct ib_uverbs_destroy_qp_resp resp; 1960 struct ib_uobject *uobj; 1961 struct ib_uqp_object *obj; 1962 int ret; 1963 1964 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1965 if (ret) 1966 return ret; 1967 1968 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1969 if (IS_ERR(uobj)) 1970 return PTR_ERR(uobj); 1971 1972 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1973 memset(&resp, 0, sizeof(resp)); 1974 resp.events_reported = obj->uevent.events_reported; 1975 1976 uobj_put_destroy(uobj); 1977 1978 return uverbs_response(attrs, &resp, sizeof(resp)); 1979 } 1980 1981 static void *alloc_wr(size_t wr_size, __u32 num_sge) 1982 { 1983 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) / 1984 sizeof(struct ib_sge)) 1985 return NULL; 1986 1987 return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) + 1988 num_sge * sizeof(struct ib_sge), 1989 GFP_KERNEL); 1990 } 1991 1992 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 1993 { 1994 struct ib_uverbs_post_send cmd; 1995 struct ib_uverbs_post_send_resp resp; 1996 struct ib_uverbs_send_wr *user_wr; 1997 struct ib_send_wr *wr = NULL, *last, *next; 1998 const struct ib_send_wr *bad_wr; 1999 struct ib_qp *qp; 2000 int i, sg_ind; 2001 int is_ud; 2002 int ret, ret2; 2003 size_t next_size; 2004 const struct ib_sge __user *sgls; 2005 const void __user *wqes; 2006 struct uverbs_req_iter iter; 2007 2008 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2009 if (ret) 2010 return ret; 2011 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count); 2012 if (IS_ERR(wqes)) 2013 return PTR_ERR(wqes); 2014 sgls = uverbs_request_next_ptr( 2015 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge)); 2016 if (IS_ERR(sgls)) 2017 return PTR_ERR(sgls); 2018 ret = uverbs_request_finish(&iter); 2019 if (ret) 2020 return ret; 2021 2022 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2023 if (!user_wr) 2024 return -ENOMEM; 2025 2026 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2027 if (!qp) { 2028 ret = -EINVAL; 2029 goto out; 2030 } 2031 2032 is_ud = qp->qp_type == IB_QPT_UD; 2033 sg_ind = 0; 2034 last = NULL; 2035 for (i = 0; i < cmd.wr_count; ++i) { 2036 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2037 cmd.wqe_size)) { 2038 ret = -EFAULT; 2039 goto out_put; 2040 } 2041 2042 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2043 ret = -EINVAL; 2044 goto out_put; 2045 } 2046 2047 if (is_ud) { 2048 struct ib_ud_wr *ud; 2049 2050 if (user_wr->opcode != IB_WR_SEND && 2051 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2052 ret = -EINVAL; 2053 goto out_put; 2054 } 2055 2056 next_size = sizeof(*ud); 2057 ud = alloc_wr(next_size, user_wr->num_sge); 2058 if (!ud) { 2059 ret = -ENOMEM; 2060 goto out_put; 2061 } 2062 2063 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2064 user_wr->wr.ud.ah, attrs); 2065 if (!ud->ah) { 2066 kfree(ud); 2067 ret = -EINVAL; 2068 goto out_put; 2069 } 2070 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2071 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2072 2073 next = &ud->wr; 2074 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2075 user_wr->opcode == IB_WR_RDMA_WRITE || 2076 user_wr->opcode == IB_WR_RDMA_READ) { 2077 struct ib_rdma_wr *rdma; 2078 2079 next_size = sizeof(*rdma); 2080 rdma = alloc_wr(next_size, user_wr->num_sge); 2081 if (!rdma) { 2082 ret = -ENOMEM; 2083 goto out_put; 2084 } 2085 2086 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2087 rdma->rkey = user_wr->wr.rdma.rkey; 2088 2089 next = &rdma->wr; 2090 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2091 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2092 struct ib_atomic_wr *atomic; 2093 2094 next_size = sizeof(*atomic); 2095 atomic = alloc_wr(next_size, user_wr->num_sge); 2096 if (!atomic) { 2097 ret = -ENOMEM; 2098 goto out_put; 2099 } 2100 2101 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2102 atomic->compare_add = user_wr->wr.atomic.compare_add; 2103 atomic->swap = user_wr->wr.atomic.swap; 2104 atomic->rkey = user_wr->wr.atomic.rkey; 2105 2106 next = &atomic->wr; 2107 } else if (user_wr->opcode == IB_WR_SEND || 2108 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2109 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2110 next_size = sizeof(*next); 2111 next = alloc_wr(next_size, user_wr->num_sge); 2112 if (!next) { 2113 ret = -ENOMEM; 2114 goto out_put; 2115 } 2116 } else { 2117 ret = -EINVAL; 2118 goto out_put; 2119 } 2120 2121 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2122 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2123 next->ex.imm_data = 2124 (__be32 __force) user_wr->ex.imm_data; 2125 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2126 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2127 } 2128 2129 if (!last) 2130 wr = next; 2131 else 2132 last->next = next; 2133 last = next; 2134 2135 next->next = NULL; 2136 next->wr_id = user_wr->wr_id; 2137 next->num_sge = user_wr->num_sge; 2138 next->opcode = user_wr->opcode; 2139 next->send_flags = user_wr->send_flags; 2140 2141 if (next->num_sge) { 2142 next->sg_list = (void *) next + 2143 ALIGN(next_size, sizeof(struct ib_sge)); 2144 if (copy_from_user(next->sg_list, sgls + sg_ind, 2145 next->num_sge * 2146 sizeof(struct ib_sge))) { 2147 ret = -EFAULT; 2148 goto out_put; 2149 } 2150 sg_ind += next->num_sge; 2151 } else 2152 next->sg_list = NULL; 2153 } 2154 2155 resp.bad_wr = 0; 2156 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2157 if (ret) 2158 for (next = wr; next; next = next->next) { 2159 ++resp.bad_wr; 2160 if (next == bad_wr) 2161 break; 2162 } 2163 2164 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2165 if (ret2) 2166 ret = ret2; 2167 2168 out_put: 2169 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2170 UVERBS_LOOKUP_READ); 2171 2172 while (wr) { 2173 if (is_ud && ud_wr(wr)->ah) 2174 uobj_put_obj_read(ud_wr(wr)->ah); 2175 next = wr->next; 2176 kfree(wr); 2177 wr = next; 2178 } 2179 2180 out: 2181 kfree(user_wr); 2182 2183 return ret; 2184 } 2185 2186 static struct ib_recv_wr * 2187 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2188 u32 wqe_size, u32 sge_count) 2189 { 2190 struct ib_uverbs_recv_wr *user_wr; 2191 struct ib_recv_wr *wr = NULL, *last, *next; 2192 int sg_ind; 2193 int i; 2194 int ret; 2195 const struct ib_sge __user *sgls; 2196 const void __user *wqes; 2197 2198 if (wqe_size < sizeof(struct ib_uverbs_recv_wr)) 2199 return ERR_PTR(-EINVAL); 2200 2201 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count); 2202 if (IS_ERR(wqes)) 2203 return ERR_CAST(wqes); 2204 sgls = uverbs_request_next_ptr( 2205 iter, sge_count * sizeof(struct ib_uverbs_sge)); 2206 if (IS_ERR(sgls)) 2207 return ERR_CAST(sgls); 2208 ret = uverbs_request_finish(iter); 2209 if (ret) 2210 return ERR_PTR(ret); 2211 2212 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2213 if (!user_wr) 2214 return ERR_PTR(-ENOMEM); 2215 2216 sg_ind = 0; 2217 last = NULL; 2218 for (i = 0; i < wr_count; ++i) { 2219 if (copy_from_user(user_wr, wqes + i * wqe_size, 2220 wqe_size)) { 2221 ret = -EFAULT; 2222 goto err; 2223 } 2224 2225 if (user_wr->num_sge + sg_ind > sge_count) { 2226 ret = -EINVAL; 2227 goto err; 2228 } 2229 2230 if (user_wr->num_sge >= 2231 (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) / 2232 sizeof(struct ib_sge)) { 2233 ret = -EINVAL; 2234 goto err; 2235 } 2236 2237 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) + 2238 user_wr->num_sge * sizeof(struct ib_sge), 2239 GFP_KERNEL); 2240 if (!next) { 2241 ret = -ENOMEM; 2242 goto err; 2243 } 2244 2245 if (!last) 2246 wr = next; 2247 else 2248 last->next = next; 2249 last = next; 2250 2251 next->next = NULL; 2252 next->wr_id = user_wr->wr_id; 2253 next->num_sge = user_wr->num_sge; 2254 2255 if (next->num_sge) { 2256 next->sg_list = (void *)next + 2257 ALIGN(sizeof(*next), sizeof(struct ib_sge)); 2258 if (copy_from_user(next->sg_list, sgls + sg_ind, 2259 next->num_sge * 2260 sizeof(struct ib_sge))) { 2261 ret = -EFAULT; 2262 goto err; 2263 } 2264 sg_ind += next->num_sge; 2265 } else 2266 next->sg_list = NULL; 2267 } 2268 2269 kfree(user_wr); 2270 return wr; 2271 2272 err: 2273 kfree(user_wr); 2274 2275 while (wr) { 2276 next = wr->next; 2277 kfree(wr); 2278 wr = next; 2279 } 2280 2281 return ERR_PTR(ret); 2282 } 2283 2284 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2285 { 2286 struct ib_uverbs_post_recv cmd; 2287 struct ib_uverbs_post_recv_resp resp; 2288 struct ib_recv_wr *wr, *next; 2289 const struct ib_recv_wr *bad_wr; 2290 struct ib_qp *qp; 2291 int ret, ret2; 2292 struct uverbs_req_iter iter; 2293 2294 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2295 if (ret) 2296 return ret; 2297 2298 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2299 cmd.sge_count); 2300 if (IS_ERR(wr)) 2301 return PTR_ERR(wr); 2302 2303 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2304 if (!qp) { 2305 ret = -EINVAL; 2306 goto out; 2307 } 2308 2309 resp.bad_wr = 0; 2310 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2311 2312 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2313 UVERBS_LOOKUP_READ); 2314 if (ret) { 2315 for (next = wr; next; next = next->next) { 2316 ++resp.bad_wr; 2317 if (next == bad_wr) 2318 break; 2319 } 2320 } 2321 2322 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2323 if (ret2) 2324 ret = ret2; 2325 out: 2326 while (wr) { 2327 next = wr->next; 2328 kfree(wr); 2329 wr = next; 2330 } 2331 2332 return ret; 2333 } 2334 2335 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2336 { 2337 struct ib_uverbs_post_srq_recv cmd; 2338 struct ib_uverbs_post_srq_recv_resp resp; 2339 struct ib_recv_wr *wr, *next; 2340 const struct ib_recv_wr *bad_wr; 2341 struct ib_srq *srq; 2342 int ret, ret2; 2343 struct uverbs_req_iter iter; 2344 2345 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2346 if (ret) 2347 return ret; 2348 2349 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2350 cmd.sge_count); 2351 if (IS_ERR(wr)) 2352 return PTR_ERR(wr); 2353 2354 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2355 if (!srq) { 2356 ret = -EINVAL; 2357 goto out; 2358 } 2359 2360 resp.bad_wr = 0; 2361 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2362 2363 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 2364 UVERBS_LOOKUP_READ); 2365 2366 if (ret) 2367 for (next = wr; next; next = next->next) { 2368 ++resp.bad_wr; 2369 if (next == bad_wr) 2370 break; 2371 } 2372 2373 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2374 if (ret2) 2375 ret = ret2; 2376 2377 out: 2378 while (wr) { 2379 next = wr->next; 2380 kfree(wr); 2381 wr = next; 2382 } 2383 2384 return ret; 2385 } 2386 2387 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2388 { 2389 struct ib_uverbs_create_ah cmd; 2390 struct ib_uverbs_create_ah_resp resp; 2391 struct ib_uobject *uobj; 2392 struct ib_pd *pd; 2393 struct ib_ah *ah; 2394 struct rdma_ah_attr attr = {}; 2395 int ret; 2396 struct ib_device *ib_dev; 2397 2398 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2399 if (ret) 2400 return ret; 2401 2402 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2403 if (IS_ERR(uobj)) 2404 return PTR_ERR(uobj); 2405 2406 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2407 ret = -EINVAL; 2408 goto err; 2409 } 2410 2411 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2412 if (!pd) { 2413 ret = -EINVAL; 2414 goto err; 2415 } 2416 2417 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2418 rdma_ah_set_make_grd(&attr, false); 2419 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2420 rdma_ah_set_sl(&attr, cmd.attr.sl); 2421 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2422 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2423 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2424 2425 if (cmd.attr.is_global) { 2426 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2427 cmd.attr.grh.sgid_index, 2428 cmd.attr.grh.hop_limit, 2429 cmd.attr.grh.traffic_class); 2430 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2431 } else { 2432 rdma_ah_set_ah_flags(&attr, 0); 2433 } 2434 2435 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2436 if (IS_ERR(ah)) { 2437 ret = PTR_ERR(ah); 2438 goto err_put; 2439 } 2440 2441 ah->uobject = uobj; 2442 uobj->user_handle = cmd.user_handle; 2443 uobj->object = ah; 2444 uobj_put_obj_read(pd); 2445 uobj_finalize_uobj_create(uobj, attrs); 2446 2447 resp.ah_handle = uobj->id; 2448 return uverbs_response(attrs, &resp, sizeof(resp)); 2449 2450 err_put: 2451 uobj_put_obj_read(pd); 2452 err: 2453 uobj_alloc_abort(uobj, attrs); 2454 return ret; 2455 } 2456 2457 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2458 { 2459 struct ib_uverbs_destroy_ah cmd; 2460 int ret; 2461 2462 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2463 if (ret) 2464 return ret; 2465 2466 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2467 } 2468 2469 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2470 { 2471 struct ib_uverbs_attach_mcast cmd; 2472 struct ib_qp *qp; 2473 struct ib_uqp_object *obj; 2474 struct ib_uverbs_mcast_entry *mcast; 2475 int ret; 2476 2477 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2478 if (ret) 2479 return ret; 2480 2481 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2482 if (!qp) 2483 return -EINVAL; 2484 2485 obj = qp->uobject; 2486 2487 mutex_lock(&obj->mcast_lock); 2488 list_for_each_entry(mcast, &obj->mcast_list, list) 2489 if (cmd.mlid == mcast->lid && 2490 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2491 ret = 0; 2492 goto out_put; 2493 } 2494 2495 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2496 if (!mcast) { 2497 ret = -ENOMEM; 2498 goto out_put; 2499 } 2500 2501 mcast->lid = cmd.mlid; 2502 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2503 2504 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2505 if (!ret) 2506 list_add_tail(&mcast->list, &obj->mcast_list); 2507 else 2508 kfree(mcast); 2509 2510 out_put: 2511 mutex_unlock(&obj->mcast_lock); 2512 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2513 UVERBS_LOOKUP_READ); 2514 2515 return ret; 2516 } 2517 2518 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2519 { 2520 struct ib_uverbs_detach_mcast cmd; 2521 struct ib_uqp_object *obj; 2522 struct ib_qp *qp; 2523 struct ib_uverbs_mcast_entry *mcast; 2524 int ret; 2525 bool found = false; 2526 2527 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2528 if (ret) 2529 return ret; 2530 2531 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2532 if (!qp) 2533 return -EINVAL; 2534 2535 obj = qp->uobject; 2536 mutex_lock(&obj->mcast_lock); 2537 2538 list_for_each_entry(mcast, &obj->mcast_list, list) 2539 if (cmd.mlid == mcast->lid && 2540 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2541 list_del(&mcast->list); 2542 kfree(mcast); 2543 found = true; 2544 break; 2545 } 2546 2547 if (!found) { 2548 ret = -EINVAL; 2549 goto out_put; 2550 } 2551 2552 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2553 2554 out_put: 2555 mutex_unlock(&obj->mcast_lock); 2556 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2557 UVERBS_LOOKUP_READ); 2558 return ret; 2559 } 2560 2561 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2562 { 2563 struct ib_uflow_resources *resources; 2564 2565 resources = kzalloc(sizeof(*resources), GFP_KERNEL); 2566 2567 if (!resources) 2568 return NULL; 2569 2570 if (!num_specs) 2571 goto out; 2572 2573 resources->counters = 2574 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); 2575 resources->collection = 2576 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); 2577 2578 if (!resources->counters || !resources->collection) 2579 goto err; 2580 2581 out: 2582 resources->max = num_specs; 2583 return resources; 2584 2585 err: 2586 kfree(resources->counters); 2587 kfree(resources); 2588 2589 return NULL; 2590 } 2591 EXPORT_SYMBOL(flow_resources_alloc); 2592 2593 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2594 { 2595 unsigned int i; 2596 2597 if (!uflow_res) 2598 return; 2599 2600 for (i = 0; i < uflow_res->collection_num; i++) 2601 atomic_dec(&uflow_res->collection[i]->usecnt); 2602 2603 for (i = 0; i < uflow_res->counters_num; i++) 2604 atomic_dec(&uflow_res->counters[i]->usecnt); 2605 2606 kfree(uflow_res->collection); 2607 kfree(uflow_res->counters); 2608 kfree(uflow_res); 2609 } 2610 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2611 2612 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2613 enum ib_flow_spec_type type, 2614 void *ibobj) 2615 { 2616 WARN_ON(uflow_res->num >= uflow_res->max); 2617 2618 switch (type) { 2619 case IB_FLOW_SPEC_ACTION_HANDLE: 2620 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2621 uflow_res->collection[uflow_res->collection_num++] = 2622 (struct ib_flow_action *)ibobj; 2623 break; 2624 case IB_FLOW_SPEC_ACTION_COUNT: 2625 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2626 uflow_res->counters[uflow_res->counters_num++] = 2627 (struct ib_counters *)ibobj; 2628 break; 2629 default: 2630 WARN_ON(1); 2631 } 2632 2633 uflow_res->num++; 2634 } 2635 EXPORT_SYMBOL(flow_resources_add); 2636 2637 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2638 struct ib_uverbs_flow_spec *kern_spec, 2639 union ib_flow_spec *ib_spec, 2640 struct ib_uflow_resources *uflow_res) 2641 { 2642 ib_spec->type = kern_spec->type; 2643 switch (ib_spec->type) { 2644 case IB_FLOW_SPEC_ACTION_TAG: 2645 if (kern_spec->flow_tag.size != 2646 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2647 return -EINVAL; 2648 2649 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2650 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2651 break; 2652 case IB_FLOW_SPEC_ACTION_DROP: 2653 if (kern_spec->drop.size != 2654 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2655 return -EINVAL; 2656 2657 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2658 break; 2659 case IB_FLOW_SPEC_ACTION_HANDLE: 2660 if (kern_spec->action.size != 2661 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2662 return -EOPNOTSUPP; 2663 ib_spec->action.act = uobj_get_obj_read(flow_action, 2664 UVERBS_OBJECT_FLOW_ACTION, 2665 kern_spec->action.handle, 2666 attrs); 2667 if (!ib_spec->action.act) 2668 return -EINVAL; 2669 ib_spec->action.size = 2670 sizeof(struct ib_flow_spec_action_handle); 2671 flow_resources_add(uflow_res, 2672 IB_FLOW_SPEC_ACTION_HANDLE, 2673 ib_spec->action.act); 2674 uobj_put_obj_read(ib_spec->action.act); 2675 break; 2676 case IB_FLOW_SPEC_ACTION_COUNT: 2677 if (kern_spec->flow_count.size != 2678 sizeof(struct ib_uverbs_flow_spec_action_count)) 2679 return -EINVAL; 2680 ib_spec->flow_count.counters = 2681 uobj_get_obj_read(counters, 2682 UVERBS_OBJECT_COUNTERS, 2683 kern_spec->flow_count.handle, 2684 attrs); 2685 if (!ib_spec->flow_count.counters) 2686 return -EINVAL; 2687 ib_spec->flow_count.size = 2688 sizeof(struct ib_flow_spec_action_count); 2689 flow_resources_add(uflow_res, 2690 IB_FLOW_SPEC_ACTION_COUNT, 2691 ib_spec->flow_count.counters); 2692 uobj_put_obj_read(ib_spec->flow_count.counters); 2693 break; 2694 default: 2695 return -EINVAL; 2696 } 2697 return 0; 2698 } 2699 2700 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2701 u16 ib_real_filter_sz) 2702 { 2703 /* 2704 * User space filter structures must be 64 bit aligned, otherwise this 2705 * may pass, but we won't handle additional new attributes. 2706 */ 2707 2708 if (kern_filter_size > ib_real_filter_sz) { 2709 if (memchr_inv(kern_spec_filter + 2710 ib_real_filter_sz, 0, 2711 kern_filter_size - ib_real_filter_sz)) 2712 return -EINVAL; 2713 return ib_real_filter_sz; 2714 } 2715 return kern_filter_size; 2716 } 2717 2718 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2719 const void *kern_spec_mask, 2720 const void *kern_spec_val, 2721 size_t kern_filter_sz, 2722 union ib_flow_spec *ib_spec) 2723 { 2724 ssize_t actual_filter_sz; 2725 ssize_t ib_filter_sz; 2726 2727 /* User flow spec size must be aligned to 4 bytes */ 2728 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2729 return -EINVAL; 2730 2731 ib_spec->type = type; 2732 2733 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2734 return -EINVAL; 2735 2736 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2737 case IB_FLOW_SPEC_ETH: 2738 ib_filter_sz = sizeof(struct ib_flow_eth_filter); 2739 actual_filter_sz = spec_filter_size(kern_spec_mask, 2740 kern_filter_sz, 2741 ib_filter_sz); 2742 if (actual_filter_sz <= 0) 2743 return -EINVAL; 2744 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2745 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2746 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2747 break; 2748 case IB_FLOW_SPEC_IPV4: 2749 ib_filter_sz = sizeof(struct ib_flow_ipv4_filter); 2750 actual_filter_sz = spec_filter_size(kern_spec_mask, 2751 kern_filter_sz, 2752 ib_filter_sz); 2753 if (actual_filter_sz <= 0) 2754 return -EINVAL; 2755 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2756 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2757 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2758 break; 2759 case IB_FLOW_SPEC_IPV6: 2760 ib_filter_sz = sizeof(struct ib_flow_ipv6_filter); 2761 actual_filter_sz = spec_filter_size(kern_spec_mask, 2762 kern_filter_sz, 2763 ib_filter_sz); 2764 if (actual_filter_sz <= 0) 2765 return -EINVAL; 2766 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2767 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2768 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2769 2770 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2771 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2772 return -EINVAL; 2773 break; 2774 case IB_FLOW_SPEC_TCP: 2775 case IB_FLOW_SPEC_UDP: 2776 ib_filter_sz = sizeof(struct ib_flow_tcp_udp_filter); 2777 actual_filter_sz = spec_filter_size(kern_spec_mask, 2778 kern_filter_sz, 2779 ib_filter_sz); 2780 if (actual_filter_sz <= 0) 2781 return -EINVAL; 2782 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2783 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2784 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2785 break; 2786 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2787 ib_filter_sz = sizeof(struct ib_flow_tunnel_filter); 2788 actual_filter_sz = spec_filter_size(kern_spec_mask, 2789 kern_filter_sz, 2790 ib_filter_sz); 2791 if (actual_filter_sz <= 0) 2792 return -EINVAL; 2793 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2794 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2795 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2796 2797 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2798 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2799 return -EINVAL; 2800 break; 2801 case IB_FLOW_SPEC_ESP: 2802 ib_filter_sz = sizeof(struct ib_flow_esp_filter); 2803 actual_filter_sz = spec_filter_size(kern_spec_mask, 2804 kern_filter_sz, 2805 ib_filter_sz); 2806 if (actual_filter_sz <= 0) 2807 return -EINVAL; 2808 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2809 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2810 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2811 break; 2812 case IB_FLOW_SPEC_GRE: 2813 ib_filter_sz = sizeof(struct ib_flow_gre_filter); 2814 actual_filter_sz = spec_filter_size(kern_spec_mask, 2815 kern_filter_sz, 2816 ib_filter_sz); 2817 if (actual_filter_sz <= 0) 2818 return -EINVAL; 2819 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2820 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2821 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2822 break; 2823 case IB_FLOW_SPEC_MPLS: 2824 ib_filter_sz = sizeof(struct ib_flow_mpls_filter); 2825 actual_filter_sz = spec_filter_size(kern_spec_mask, 2826 kern_filter_sz, 2827 ib_filter_sz); 2828 if (actual_filter_sz <= 0) 2829 return -EINVAL; 2830 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2831 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2832 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2833 break; 2834 default: 2835 return -EINVAL; 2836 } 2837 return 0; 2838 } 2839 2840 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2841 union ib_flow_spec *ib_spec) 2842 { 2843 size_t kern_filter_sz; 2844 void *kern_spec_mask; 2845 void *kern_spec_val; 2846 2847 if (check_sub_overflow((size_t)kern_spec->hdr.size, 2848 sizeof(struct ib_uverbs_flow_spec_hdr), 2849 &kern_filter_sz)) 2850 return -EINVAL; 2851 2852 kern_filter_sz /= 2; 2853 2854 kern_spec_val = (void *)kern_spec + 2855 sizeof(struct ib_uverbs_flow_spec_hdr); 2856 kern_spec_mask = kern_spec_val + kern_filter_sz; 2857 2858 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2859 kern_spec_mask, 2860 kern_spec_val, 2861 kern_filter_sz, ib_spec); 2862 } 2863 2864 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2865 struct ib_uverbs_flow_spec *kern_spec, 2866 union ib_flow_spec *ib_spec, 2867 struct ib_uflow_resources *uflow_res) 2868 { 2869 if (kern_spec->reserved) 2870 return -EINVAL; 2871 2872 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2873 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2874 uflow_res); 2875 else 2876 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2877 } 2878 2879 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2880 { 2881 struct ib_uverbs_ex_create_wq cmd; 2882 struct ib_uverbs_ex_create_wq_resp resp = {}; 2883 struct ib_uwq_object *obj; 2884 int err = 0; 2885 struct ib_cq *cq; 2886 struct ib_pd *pd; 2887 struct ib_wq *wq; 2888 struct ib_wq_init_attr wq_init_attr = {}; 2889 struct ib_device *ib_dev; 2890 2891 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2892 if (err) 2893 return err; 2894 2895 if (cmd.comp_mask) 2896 return -EOPNOTSUPP; 2897 2898 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2899 &ib_dev); 2900 if (IS_ERR(obj)) 2901 return PTR_ERR(obj); 2902 2903 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2904 if (!pd) { 2905 err = -EINVAL; 2906 goto err_uobj; 2907 } 2908 2909 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2910 if (!cq) { 2911 err = -EINVAL; 2912 goto err_put_pd; 2913 } 2914 2915 wq_init_attr.cq = cq; 2916 wq_init_attr.max_sge = cmd.max_sge; 2917 wq_init_attr.max_wr = cmd.max_wr; 2918 wq_init_attr.wq_type = cmd.wq_type; 2919 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2920 wq_init_attr.create_flags = cmd.create_flags; 2921 INIT_LIST_HEAD(&obj->uevent.event_list); 2922 obj->uevent.uobject.user_handle = cmd.user_handle; 2923 2924 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2925 if (IS_ERR(wq)) { 2926 err = PTR_ERR(wq); 2927 goto err_put_cq; 2928 } 2929 2930 wq->uobject = obj; 2931 obj->uevent.uobject.object = wq; 2932 wq->wq_type = wq_init_attr.wq_type; 2933 wq->cq = cq; 2934 wq->pd = pd; 2935 wq->device = pd->device; 2936 atomic_set(&wq->usecnt, 0); 2937 atomic_inc(&pd->usecnt); 2938 atomic_inc(&cq->usecnt); 2939 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 2940 if (obj->uevent.event_file) 2941 uverbs_uobject_get(&obj->uevent.event_file->uobj); 2942 2943 uobj_put_obj_read(pd); 2944 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2945 UVERBS_LOOKUP_READ); 2946 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 2947 2948 resp.wq_handle = obj->uevent.uobject.id; 2949 resp.max_sge = wq_init_attr.max_sge; 2950 resp.max_wr = wq_init_attr.max_wr; 2951 resp.wqn = wq->wq_num; 2952 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2953 return uverbs_response(attrs, &resp, sizeof(resp)); 2954 2955 err_put_cq: 2956 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2957 UVERBS_LOOKUP_READ); 2958 err_put_pd: 2959 uobj_put_obj_read(pd); 2960 err_uobj: 2961 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2962 2963 return err; 2964 } 2965 2966 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2967 { 2968 struct ib_uverbs_ex_destroy_wq cmd; 2969 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 2970 struct ib_uobject *uobj; 2971 struct ib_uwq_object *obj; 2972 int ret; 2973 2974 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2975 if (ret) 2976 return ret; 2977 2978 if (cmd.comp_mask) 2979 return -EOPNOTSUPP; 2980 2981 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2982 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 2983 if (IS_ERR(uobj)) 2984 return PTR_ERR(uobj); 2985 2986 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 2987 resp.events_reported = obj->uevent.events_reported; 2988 2989 uobj_put_destroy(uobj); 2990 2991 return uverbs_response(attrs, &resp, sizeof(resp)); 2992 } 2993 2994 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 2995 { 2996 struct ib_uverbs_ex_modify_wq cmd; 2997 struct ib_wq *wq; 2998 struct ib_wq_attr wq_attr = {}; 2999 int ret; 3000 3001 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3002 if (ret) 3003 return ret; 3004 3005 if (!cmd.attr_mask) 3006 return -EINVAL; 3007 3008 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3009 return -EINVAL; 3010 3011 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3012 if (!wq) 3013 return -EINVAL; 3014 3015 if (cmd.attr_mask & IB_WQ_FLAGS) { 3016 wq_attr.flags = cmd.flags; 3017 wq_attr.flags_mask = cmd.flags_mask; 3018 } 3019 3020 if (cmd.attr_mask & IB_WQ_CUR_STATE) { 3021 if (cmd.curr_wq_state > IB_WQS_ERR) 3022 return -EINVAL; 3023 3024 wq_attr.curr_wq_state = cmd.curr_wq_state; 3025 } else { 3026 wq_attr.curr_wq_state = wq->state; 3027 } 3028 3029 if (cmd.attr_mask & IB_WQ_STATE) { 3030 if (cmd.wq_state > IB_WQS_ERR) 3031 return -EINVAL; 3032 3033 wq_attr.wq_state = cmd.wq_state; 3034 } else { 3035 wq_attr.wq_state = wq_attr.curr_wq_state; 3036 } 3037 3038 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3039 &attrs->driver_udata); 3040 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, 3041 UVERBS_LOOKUP_READ); 3042 return ret; 3043 } 3044 3045 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3046 { 3047 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3048 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3049 struct ib_uobject *uobj; 3050 int err; 3051 struct ib_rwq_ind_table_init_attr init_attr = {}; 3052 struct ib_rwq_ind_table *rwq_ind_tbl; 3053 struct ib_wq **wqs = NULL; 3054 u32 *wqs_handles = NULL; 3055 struct ib_wq *wq = NULL; 3056 int i, num_read_wqs; 3057 u32 num_wq_handles; 3058 struct uverbs_req_iter iter; 3059 struct ib_device *ib_dev; 3060 3061 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3062 if (err) 3063 return err; 3064 3065 if (cmd.comp_mask) 3066 return -EOPNOTSUPP; 3067 3068 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3069 return -EINVAL; 3070 3071 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3072 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3073 GFP_KERNEL); 3074 if (!wqs_handles) 3075 return -ENOMEM; 3076 3077 err = uverbs_request_next(&iter, wqs_handles, 3078 num_wq_handles * sizeof(__u32)); 3079 if (err) 3080 goto err_free; 3081 3082 err = uverbs_request_finish(&iter); 3083 if (err) 3084 goto err_free; 3085 3086 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); 3087 if (!wqs) { 3088 err = -ENOMEM; 3089 goto err_free; 3090 } 3091 3092 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3093 num_read_wqs++) { 3094 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3095 wqs_handles[num_read_wqs], attrs); 3096 if (!wq) { 3097 err = -EINVAL; 3098 goto put_wqs; 3099 } 3100 3101 wqs[num_read_wqs] = wq; 3102 atomic_inc(&wqs[num_read_wqs]->usecnt); 3103 } 3104 3105 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3106 if (IS_ERR(uobj)) { 3107 err = PTR_ERR(uobj); 3108 goto put_wqs; 3109 } 3110 3111 rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table); 3112 if (!rwq_ind_tbl) { 3113 err = -ENOMEM; 3114 goto err_uobj; 3115 } 3116 3117 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3118 init_attr.ind_tbl = wqs; 3119 3120 rwq_ind_tbl->ind_tbl = wqs; 3121 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3122 rwq_ind_tbl->uobject = uobj; 3123 uobj->object = rwq_ind_tbl; 3124 rwq_ind_tbl->device = ib_dev; 3125 atomic_set(&rwq_ind_tbl->usecnt, 0); 3126 3127 err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr, 3128 &attrs->driver_udata); 3129 if (err) 3130 goto err_create; 3131 3132 for (i = 0; i < num_wq_handles; i++) 3133 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3134 UVERBS_LOOKUP_READ); 3135 kfree(wqs_handles); 3136 uobj_finalize_uobj_create(uobj, attrs); 3137 3138 resp.ind_tbl_handle = uobj->id; 3139 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3140 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3141 return uverbs_response(attrs, &resp, sizeof(resp)); 3142 3143 err_create: 3144 kfree(rwq_ind_tbl); 3145 err_uobj: 3146 uobj_alloc_abort(uobj, attrs); 3147 put_wqs: 3148 for (i = 0; i < num_read_wqs; i++) { 3149 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3150 UVERBS_LOOKUP_READ); 3151 atomic_dec(&wqs[i]->usecnt); 3152 } 3153 err_free: 3154 kfree(wqs_handles); 3155 kfree(wqs); 3156 return err; 3157 } 3158 3159 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3160 { 3161 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3162 int ret; 3163 3164 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3165 if (ret) 3166 return ret; 3167 3168 if (cmd.comp_mask) 3169 return -EOPNOTSUPP; 3170 3171 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3172 cmd.ind_tbl_handle, attrs); 3173 } 3174 3175 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3176 { 3177 struct ib_uverbs_create_flow cmd; 3178 struct ib_uverbs_create_flow_resp resp = {}; 3179 struct ib_uobject *uobj; 3180 struct ib_flow *flow_id; 3181 struct ib_uverbs_flow_attr *kern_flow_attr; 3182 struct ib_flow_attr *flow_attr; 3183 struct ib_qp *qp; 3184 struct ib_uflow_resources *uflow_res; 3185 struct ib_uverbs_flow_spec_hdr *kern_spec; 3186 struct uverbs_req_iter iter; 3187 int err; 3188 void *ib_spec; 3189 int i; 3190 struct ib_device *ib_dev; 3191 3192 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3193 if (err) 3194 return err; 3195 3196 if (cmd.comp_mask) 3197 return -EINVAL; 3198 3199 if (!capable(CAP_NET_RAW)) 3200 return -EPERM; 3201 3202 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3203 return -EINVAL; 3204 3205 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3206 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3207 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3208 return -EINVAL; 3209 3210 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3211 return -EINVAL; 3212 3213 if (cmd.flow_attr.size > 3214 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3215 return -EINVAL; 3216 3217 if (cmd.flow_attr.reserved[0] || 3218 cmd.flow_attr.reserved[1]) 3219 return -EINVAL; 3220 3221 if (cmd.flow_attr.num_of_specs) { 3222 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3223 GFP_KERNEL); 3224 if (!kern_flow_attr) 3225 return -ENOMEM; 3226 3227 *kern_flow_attr = cmd.flow_attr; 3228 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3229 cmd.flow_attr.size); 3230 if (err) 3231 goto err_free_attr; 3232 } else { 3233 kern_flow_attr = &cmd.flow_attr; 3234 } 3235 3236 err = uverbs_request_finish(&iter); 3237 if (err) 3238 goto err_free_attr; 3239 3240 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3241 if (IS_ERR(uobj)) { 3242 err = PTR_ERR(uobj); 3243 goto err_free_attr; 3244 } 3245 3246 if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) { 3247 err = -EINVAL; 3248 goto err_uobj; 3249 } 3250 3251 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3252 if (!qp) { 3253 err = -EINVAL; 3254 goto err_uobj; 3255 } 3256 3257 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3258 err = -EINVAL; 3259 goto err_put; 3260 } 3261 3262 flow_attr = kzalloc(struct_size(flow_attr, flows, 3263 cmd.flow_attr.num_of_specs), GFP_KERNEL); 3264 if (!flow_attr) { 3265 err = -ENOMEM; 3266 goto err_put; 3267 } 3268 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3269 if (!uflow_res) { 3270 err = -ENOMEM; 3271 goto err_free_flow_attr; 3272 } 3273 3274 flow_attr->type = kern_flow_attr->type; 3275 flow_attr->priority = kern_flow_attr->priority; 3276 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3277 flow_attr->port = kern_flow_attr->port; 3278 flow_attr->flags = kern_flow_attr->flags; 3279 flow_attr->size = sizeof(*flow_attr); 3280 3281 kern_spec = kern_flow_attr->flow_specs; 3282 ib_spec = flow_attr + 1; 3283 for (i = 0; i < flow_attr->num_of_specs && 3284 cmd.flow_attr.size >= sizeof(*kern_spec) && 3285 cmd.flow_attr.size >= kern_spec->size; 3286 i++) { 3287 err = kern_spec_to_ib_spec( 3288 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3289 ib_spec, uflow_res); 3290 if (err) 3291 goto err_free; 3292 3293 flow_attr->size += 3294 ((union ib_flow_spec *) ib_spec)->size; 3295 cmd.flow_attr.size -= kern_spec->size; 3296 kern_spec = ((void *)kern_spec) + kern_spec->size; 3297 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3298 } 3299 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3300 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n", 3301 i, cmd.flow_attr.size); 3302 err = -EINVAL; 3303 goto err_free; 3304 } 3305 3306 flow_id = qp->device->ops.create_flow(qp, flow_attr, 3307 &attrs->driver_udata); 3308 3309 if (IS_ERR(flow_id)) { 3310 err = PTR_ERR(flow_id); 3311 goto err_free; 3312 } 3313 3314 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3315 3316 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3317 UVERBS_LOOKUP_READ); 3318 kfree(flow_attr); 3319 3320 if (cmd.flow_attr.num_of_specs) 3321 kfree(kern_flow_attr); 3322 uobj_finalize_uobj_create(uobj, attrs); 3323 3324 resp.flow_handle = uobj->id; 3325 return uverbs_response(attrs, &resp, sizeof(resp)); 3326 3327 err_free: 3328 ib_uverbs_flow_resources_free(uflow_res); 3329 err_free_flow_attr: 3330 kfree(flow_attr); 3331 err_put: 3332 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3333 UVERBS_LOOKUP_READ); 3334 err_uobj: 3335 uobj_alloc_abort(uobj, attrs); 3336 err_free_attr: 3337 if (cmd.flow_attr.num_of_specs) 3338 kfree(kern_flow_attr); 3339 return err; 3340 } 3341 3342 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3343 { 3344 struct ib_uverbs_destroy_flow cmd; 3345 int ret; 3346 3347 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3348 if (ret) 3349 return ret; 3350 3351 if (cmd.comp_mask) 3352 return -EINVAL; 3353 3354 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3355 } 3356 3357 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3358 struct ib_uverbs_create_xsrq *cmd, 3359 struct ib_udata *udata) 3360 { 3361 struct ib_uverbs_create_srq_resp resp = {}; 3362 struct ib_usrq_object *obj; 3363 struct ib_pd *pd; 3364 struct ib_srq *srq; 3365 struct ib_srq_init_attr attr; 3366 int ret; 3367 struct ib_uobject *xrcd_uobj; 3368 struct ib_device *ib_dev; 3369 3370 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3371 &ib_dev); 3372 if (IS_ERR(obj)) 3373 return PTR_ERR(obj); 3374 3375 if (cmd->srq_type == IB_SRQT_TM) 3376 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3377 3378 if (cmd->srq_type == IB_SRQT_XRC) { 3379 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3380 attrs); 3381 if (IS_ERR(xrcd_uobj)) { 3382 ret = -EINVAL; 3383 goto err; 3384 } 3385 3386 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3387 if (!attr.ext.xrc.xrcd) { 3388 ret = -EINVAL; 3389 goto err_put_xrcd; 3390 } 3391 3392 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3393 atomic_inc(&obj->uxrcd->refcnt); 3394 } 3395 3396 if (ib_srq_has_cq(cmd->srq_type)) { 3397 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3398 cmd->cq_handle, attrs); 3399 if (!attr.ext.cq) { 3400 ret = -EINVAL; 3401 goto err_put_xrcd; 3402 } 3403 } 3404 3405 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3406 if (!pd) { 3407 ret = -EINVAL; 3408 goto err_put_cq; 3409 } 3410 3411 attr.event_handler = ib_uverbs_srq_event_handler; 3412 attr.srq_type = cmd->srq_type; 3413 attr.attr.max_wr = cmd->max_wr; 3414 attr.attr.max_sge = cmd->max_sge; 3415 attr.attr.srq_limit = cmd->srq_limit; 3416 3417 INIT_LIST_HEAD(&obj->uevent.event_list); 3418 obj->uevent.uobject.user_handle = cmd->user_handle; 3419 3420 srq = ib_create_srq_user(pd, &attr, obj, udata); 3421 if (IS_ERR(srq)) { 3422 ret = PTR_ERR(srq); 3423 goto err_put_pd; 3424 } 3425 3426 obj->uevent.uobject.object = srq; 3427 obj->uevent.uobject.user_handle = cmd->user_handle; 3428 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 3429 if (obj->uevent.event_file) 3430 uverbs_uobject_get(&obj->uevent.event_file->uobj); 3431 3432 if (cmd->srq_type == IB_SRQT_XRC) 3433 resp.srqn = srq->ext.xrc.srq_num; 3434 3435 if (cmd->srq_type == IB_SRQT_XRC) 3436 uobj_put_read(xrcd_uobj); 3437 3438 if (ib_srq_has_cq(cmd->srq_type)) 3439 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3440 UVERBS_LOOKUP_READ); 3441 3442 uobj_put_obj_read(pd); 3443 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 3444 3445 resp.srq_handle = obj->uevent.uobject.id; 3446 resp.max_wr = attr.attr.max_wr; 3447 resp.max_sge = attr.attr.max_sge; 3448 return uverbs_response(attrs, &resp, sizeof(resp)); 3449 3450 err_put_pd: 3451 uobj_put_obj_read(pd); 3452 err_put_cq: 3453 if (ib_srq_has_cq(cmd->srq_type)) 3454 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3455 UVERBS_LOOKUP_READ); 3456 3457 err_put_xrcd: 3458 if (cmd->srq_type == IB_SRQT_XRC) { 3459 atomic_dec(&obj->uxrcd->refcnt); 3460 uobj_put_read(xrcd_uobj); 3461 } 3462 3463 err: 3464 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3465 return ret; 3466 } 3467 3468 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3469 { 3470 struct ib_uverbs_create_srq cmd; 3471 struct ib_uverbs_create_xsrq xcmd; 3472 int ret; 3473 3474 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3475 if (ret) 3476 return ret; 3477 3478 memset(&xcmd, 0, sizeof(xcmd)); 3479 xcmd.response = cmd.response; 3480 xcmd.user_handle = cmd.user_handle; 3481 xcmd.srq_type = IB_SRQT_BASIC; 3482 xcmd.pd_handle = cmd.pd_handle; 3483 xcmd.max_wr = cmd.max_wr; 3484 xcmd.max_sge = cmd.max_sge; 3485 xcmd.srq_limit = cmd.srq_limit; 3486 3487 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3488 } 3489 3490 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3491 { 3492 struct ib_uverbs_create_xsrq cmd; 3493 int ret; 3494 3495 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3496 if (ret) 3497 return ret; 3498 3499 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3500 } 3501 3502 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3503 { 3504 struct ib_uverbs_modify_srq cmd; 3505 struct ib_srq *srq; 3506 struct ib_srq_attr attr; 3507 int ret; 3508 3509 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3510 if (ret) 3511 return ret; 3512 3513 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3514 if (!srq) 3515 return -EINVAL; 3516 3517 attr.max_wr = cmd.max_wr; 3518 attr.srq_limit = cmd.srq_limit; 3519 3520 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3521 &attrs->driver_udata); 3522 3523 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3524 UVERBS_LOOKUP_READ); 3525 3526 return ret; 3527 } 3528 3529 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3530 { 3531 struct ib_uverbs_query_srq cmd; 3532 struct ib_uverbs_query_srq_resp resp; 3533 struct ib_srq_attr attr; 3534 struct ib_srq *srq; 3535 int ret; 3536 3537 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3538 if (ret) 3539 return ret; 3540 3541 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3542 if (!srq) 3543 return -EINVAL; 3544 3545 ret = ib_query_srq(srq, &attr); 3546 3547 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3548 UVERBS_LOOKUP_READ); 3549 3550 if (ret) 3551 return ret; 3552 3553 memset(&resp, 0, sizeof resp); 3554 3555 resp.max_wr = attr.max_wr; 3556 resp.max_sge = attr.max_sge; 3557 resp.srq_limit = attr.srq_limit; 3558 3559 return uverbs_response(attrs, &resp, sizeof(resp)); 3560 } 3561 3562 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3563 { 3564 struct ib_uverbs_destroy_srq cmd; 3565 struct ib_uverbs_destroy_srq_resp resp; 3566 struct ib_uobject *uobj; 3567 struct ib_uevent_object *obj; 3568 int ret; 3569 3570 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3571 if (ret) 3572 return ret; 3573 3574 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3575 if (IS_ERR(uobj)) 3576 return PTR_ERR(uobj); 3577 3578 obj = container_of(uobj, struct ib_uevent_object, uobject); 3579 memset(&resp, 0, sizeof(resp)); 3580 resp.events_reported = obj->events_reported; 3581 3582 uobj_put_destroy(uobj); 3583 3584 return uverbs_response(attrs, &resp, sizeof(resp)); 3585 } 3586 3587 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3588 { 3589 struct ib_uverbs_ex_query_device_resp resp = {}; 3590 struct ib_uverbs_ex_query_device cmd; 3591 struct ib_device_attr attr = {0}; 3592 struct ib_ucontext *ucontext; 3593 struct ib_device *ib_dev; 3594 int err; 3595 3596 ucontext = ib_uverbs_get_ucontext(attrs); 3597 if (IS_ERR(ucontext)) 3598 return PTR_ERR(ucontext); 3599 ib_dev = ucontext->device; 3600 3601 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3602 if (err) 3603 return err; 3604 3605 if (cmd.comp_mask) 3606 return -EINVAL; 3607 3608 if (cmd.reserved) 3609 return -EINVAL; 3610 3611 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3612 if (err) 3613 return err; 3614 3615 copy_query_dev_fields(ucontext, &resp.base, &attr); 3616 3617 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3618 resp.odp_caps.per_transport_caps.rc_odp_caps = 3619 attr.odp_caps.per_transport_caps.rc_odp_caps; 3620 resp.odp_caps.per_transport_caps.uc_odp_caps = 3621 attr.odp_caps.per_transport_caps.uc_odp_caps; 3622 resp.odp_caps.per_transport_caps.ud_odp_caps = 3623 attr.odp_caps.per_transport_caps.ud_odp_caps; 3624 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3625 3626 resp.timestamp_mask = attr.timestamp_mask; 3627 resp.hca_core_clock = attr.hca_core_clock; 3628 resp.device_cap_flags_ex = attr.device_cap_flags; 3629 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3630 resp.rss_caps.max_rwq_indirection_tables = 3631 attr.rss_caps.max_rwq_indirection_tables; 3632 resp.rss_caps.max_rwq_indirection_table_size = 3633 attr.rss_caps.max_rwq_indirection_table_size; 3634 resp.max_wq_type_rq = attr.max_wq_type_rq; 3635 resp.raw_packet_caps = attr.raw_packet_caps; 3636 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3637 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3638 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3639 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3640 resp.tm_caps.flags = attr.tm_caps.flags; 3641 resp.cq_moderation_caps.max_cq_moderation_count = 3642 attr.cq_caps.max_cq_moderation_count; 3643 resp.cq_moderation_caps.max_cq_moderation_period = 3644 attr.cq_caps.max_cq_moderation_period; 3645 resp.max_dm_size = attr.max_dm_size; 3646 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3647 3648 return uverbs_response(attrs, &resp, sizeof(resp)); 3649 } 3650 3651 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3652 { 3653 struct ib_uverbs_ex_modify_cq cmd; 3654 struct ib_cq *cq; 3655 int ret; 3656 3657 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3658 if (ret) 3659 return ret; 3660 3661 if (!cmd.attr_mask || cmd.reserved) 3662 return -EINVAL; 3663 3664 if (cmd.attr_mask > IB_CQ_MODERATE) 3665 return -EOPNOTSUPP; 3666 3667 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3668 if (!cq) 3669 return -EINVAL; 3670 3671 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3672 3673 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3674 UVERBS_LOOKUP_READ); 3675 return ret; 3676 } 3677 3678 /* 3679 * Describe the input structs for write(). Some write methods have an input 3680 * only struct, most have an input and output. If the struct has an output then 3681 * the 'response' u64 must be the first field in the request structure. 3682 * 3683 * If udata is present then both the request and response structs have a 3684 * trailing driver_data flex array. In this case the size of the base struct 3685 * cannot be changed. 3686 */ 3687 #define UAPI_DEF_WRITE_IO(req, resp) \ 3688 .write.has_resp = 1 + \ 3689 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3690 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \ 3691 sizeof(u64)), \ 3692 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3693 3694 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3695 3696 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3697 UAPI_DEF_WRITE_IO(req, resp), \ 3698 .write.has_udata = \ 3699 1 + \ 3700 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3701 sizeof(req)) + \ 3702 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3703 sizeof(resp)) 3704 3705 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3706 UAPI_DEF_WRITE_I(req), \ 3707 .write.has_udata = \ 3708 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3709 sizeof(req)) 3710 3711 /* 3712 * The _EX versions are for use with WRITE_EX and allow the last struct member 3713 * to be specified. Buffers that do not include that member will be rejected. 3714 */ 3715 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3716 .write.has_resp = 1, \ 3717 .write.req_size = offsetofend(req, req_last_member), \ 3718 .write.resp_size = offsetofend(resp, resp_last_member) 3719 3720 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3721 .write.req_size = offsetofend(req, req_last_member) 3722 3723 const struct uapi_definition uverbs_def_write_intf[] = { 3724 DECLARE_UVERBS_OBJECT( 3725 UVERBS_OBJECT_AH, 3726 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3727 ib_uverbs_create_ah, 3728 UAPI_DEF_WRITE_UDATA_IO( 3729 struct ib_uverbs_create_ah, 3730 struct ib_uverbs_create_ah_resp)), 3731 DECLARE_UVERBS_WRITE( 3732 IB_USER_VERBS_CMD_DESTROY_AH, 3733 ib_uverbs_destroy_ah, 3734 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)), 3735 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah), 3736 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)), 3737 3738 DECLARE_UVERBS_OBJECT( 3739 UVERBS_OBJECT_COMP_CHANNEL, 3740 DECLARE_UVERBS_WRITE( 3741 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3742 ib_uverbs_create_comp_channel, 3743 UAPI_DEF_WRITE_IO( 3744 struct ib_uverbs_create_comp_channel, 3745 struct ib_uverbs_create_comp_channel_resp))), 3746 3747 DECLARE_UVERBS_OBJECT( 3748 UVERBS_OBJECT_CQ, 3749 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3750 ib_uverbs_create_cq, 3751 UAPI_DEF_WRITE_UDATA_IO( 3752 struct ib_uverbs_create_cq, 3753 struct ib_uverbs_create_cq_resp), 3754 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3755 DECLARE_UVERBS_WRITE( 3756 IB_USER_VERBS_CMD_DESTROY_CQ, 3757 ib_uverbs_destroy_cq, 3758 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3759 struct ib_uverbs_destroy_cq_resp), 3760 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3761 DECLARE_UVERBS_WRITE( 3762 IB_USER_VERBS_CMD_POLL_CQ, 3763 ib_uverbs_poll_cq, 3764 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3765 struct ib_uverbs_poll_cq_resp), 3766 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3767 DECLARE_UVERBS_WRITE( 3768 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3769 ib_uverbs_req_notify_cq, 3770 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3771 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3772 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3773 ib_uverbs_resize_cq, 3774 UAPI_DEF_WRITE_UDATA_IO( 3775 struct ib_uverbs_resize_cq, 3776 struct ib_uverbs_resize_cq_resp), 3777 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3778 DECLARE_UVERBS_WRITE_EX( 3779 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3780 ib_uverbs_ex_create_cq, 3781 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3782 reserved, 3783 struct ib_uverbs_ex_create_cq_resp, 3784 response_length), 3785 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3786 DECLARE_UVERBS_WRITE_EX( 3787 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3788 ib_uverbs_ex_modify_cq, 3789 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3790 UAPI_DEF_METHOD_NEEDS_FN(modify_cq))), 3791 3792 DECLARE_UVERBS_OBJECT( 3793 UVERBS_OBJECT_DEVICE, 3794 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3795 ib_uverbs_get_context, 3796 UAPI_DEF_WRITE_UDATA_IO( 3797 struct ib_uverbs_get_context, 3798 struct ib_uverbs_get_context_resp)), 3799 DECLARE_UVERBS_WRITE( 3800 IB_USER_VERBS_CMD_QUERY_DEVICE, 3801 ib_uverbs_query_device, 3802 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3803 struct ib_uverbs_query_device_resp)), 3804 DECLARE_UVERBS_WRITE( 3805 IB_USER_VERBS_CMD_QUERY_PORT, 3806 ib_uverbs_query_port, 3807 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3808 struct ib_uverbs_query_port_resp), 3809 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3810 DECLARE_UVERBS_WRITE_EX( 3811 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3812 ib_uverbs_ex_query_device, 3813 UAPI_DEF_WRITE_IO_EX( 3814 struct ib_uverbs_ex_query_device, 3815 reserved, 3816 struct ib_uverbs_ex_query_device_resp, 3817 response_length), 3818 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3819 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3820 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3821 3822 DECLARE_UVERBS_OBJECT( 3823 UVERBS_OBJECT_FLOW, 3824 DECLARE_UVERBS_WRITE_EX( 3825 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3826 ib_uverbs_ex_create_flow, 3827 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3828 flow_attr, 3829 struct ib_uverbs_create_flow_resp, 3830 flow_handle), 3831 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3832 DECLARE_UVERBS_WRITE_EX( 3833 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3834 ib_uverbs_ex_destroy_flow, 3835 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3836 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3837 3838 DECLARE_UVERBS_OBJECT( 3839 UVERBS_OBJECT_MR, 3840 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3841 ib_uverbs_dereg_mr, 3842 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3843 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3844 DECLARE_UVERBS_WRITE( 3845 IB_USER_VERBS_CMD_REG_MR, 3846 ib_uverbs_reg_mr, 3847 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3848 struct ib_uverbs_reg_mr_resp), 3849 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3850 DECLARE_UVERBS_WRITE( 3851 IB_USER_VERBS_CMD_REREG_MR, 3852 ib_uverbs_rereg_mr, 3853 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3854 struct ib_uverbs_rereg_mr_resp), 3855 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3856 3857 DECLARE_UVERBS_OBJECT( 3858 UVERBS_OBJECT_MW, 3859 DECLARE_UVERBS_WRITE( 3860 IB_USER_VERBS_CMD_ALLOC_MW, 3861 ib_uverbs_alloc_mw, 3862 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3863 struct ib_uverbs_alloc_mw_resp), 3864 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3865 DECLARE_UVERBS_WRITE( 3866 IB_USER_VERBS_CMD_DEALLOC_MW, 3867 ib_uverbs_dealloc_mw, 3868 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3869 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3870 3871 DECLARE_UVERBS_OBJECT( 3872 UVERBS_OBJECT_PD, 3873 DECLARE_UVERBS_WRITE( 3874 IB_USER_VERBS_CMD_ALLOC_PD, 3875 ib_uverbs_alloc_pd, 3876 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3877 struct ib_uverbs_alloc_pd_resp), 3878 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3879 DECLARE_UVERBS_WRITE( 3880 IB_USER_VERBS_CMD_DEALLOC_PD, 3881 ib_uverbs_dealloc_pd, 3882 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3883 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3884 3885 DECLARE_UVERBS_OBJECT( 3886 UVERBS_OBJECT_QP, 3887 DECLARE_UVERBS_WRITE( 3888 IB_USER_VERBS_CMD_ATTACH_MCAST, 3889 ib_uverbs_attach_mcast, 3890 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3891 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3892 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3893 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3894 ib_uverbs_create_qp, 3895 UAPI_DEF_WRITE_UDATA_IO( 3896 struct ib_uverbs_create_qp, 3897 struct ib_uverbs_create_qp_resp), 3898 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3899 DECLARE_UVERBS_WRITE( 3900 IB_USER_VERBS_CMD_DESTROY_QP, 3901 ib_uverbs_destroy_qp, 3902 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3903 struct ib_uverbs_destroy_qp_resp), 3904 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3905 DECLARE_UVERBS_WRITE( 3906 IB_USER_VERBS_CMD_DETACH_MCAST, 3907 ib_uverbs_detach_mcast, 3908 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3909 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3910 DECLARE_UVERBS_WRITE( 3911 IB_USER_VERBS_CMD_MODIFY_QP, 3912 ib_uverbs_modify_qp, 3913 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3914 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3915 DECLARE_UVERBS_WRITE( 3916 IB_USER_VERBS_CMD_POST_RECV, 3917 ib_uverbs_post_recv, 3918 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3919 struct ib_uverbs_post_recv_resp), 3920 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3921 DECLARE_UVERBS_WRITE( 3922 IB_USER_VERBS_CMD_POST_SEND, 3923 ib_uverbs_post_send, 3924 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3925 struct ib_uverbs_post_send_resp), 3926 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3927 DECLARE_UVERBS_WRITE( 3928 IB_USER_VERBS_CMD_QUERY_QP, 3929 ib_uverbs_query_qp, 3930 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3931 struct ib_uverbs_query_qp_resp), 3932 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3933 DECLARE_UVERBS_WRITE_EX( 3934 IB_USER_VERBS_EX_CMD_CREATE_QP, 3935 ib_uverbs_ex_create_qp, 3936 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3937 comp_mask, 3938 struct ib_uverbs_ex_create_qp_resp, 3939 response_length), 3940 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3941 DECLARE_UVERBS_WRITE_EX( 3942 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3943 ib_uverbs_ex_modify_qp, 3944 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3945 base, 3946 struct ib_uverbs_ex_modify_qp_resp, 3947 response_length), 3948 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3949 3950 DECLARE_UVERBS_OBJECT( 3951 UVERBS_OBJECT_RWQ_IND_TBL, 3952 DECLARE_UVERBS_WRITE_EX( 3953 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3954 ib_uverbs_ex_create_rwq_ind_table, 3955 UAPI_DEF_WRITE_IO_EX( 3956 struct ib_uverbs_ex_create_rwq_ind_table, 3957 log_ind_tbl_size, 3958 struct ib_uverbs_ex_create_rwq_ind_table_resp, 3959 ind_tbl_num), 3960 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 3961 DECLARE_UVERBS_WRITE_EX( 3962 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 3963 ib_uverbs_ex_destroy_rwq_ind_table, 3964 UAPI_DEF_WRITE_I( 3965 struct ib_uverbs_ex_destroy_rwq_ind_table), 3966 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 3967 3968 DECLARE_UVERBS_OBJECT( 3969 UVERBS_OBJECT_WQ, 3970 DECLARE_UVERBS_WRITE_EX( 3971 IB_USER_VERBS_EX_CMD_CREATE_WQ, 3972 ib_uverbs_ex_create_wq, 3973 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 3974 max_sge, 3975 struct ib_uverbs_ex_create_wq_resp, 3976 wqn), 3977 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 3978 DECLARE_UVERBS_WRITE_EX( 3979 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 3980 ib_uverbs_ex_destroy_wq, 3981 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 3982 wq_handle, 3983 struct ib_uverbs_ex_destroy_wq_resp, 3984 reserved), 3985 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 3986 DECLARE_UVERBS_WRITE_EX( 3987 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 3988 ib_uverbs_ex_modify_wq, 3989 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 3990 curr_wq_state), 3991 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 3992 3993 DECLARE_UVERBS_OBJECT( 3994 UVERBS_OBJECT_SRQ, 3995 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 3996 ib_uverbs_create_srq, 3997 UAPI_DEF_WRITE_UDATA_IO( 3998 struct ib_uverbs_create_srq, 3999 struct ib_uverbs_create_srq_resp), 4000 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4001 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 4002 ib_uverbs_create_xsrq, 4003 UAPI_DEF_WRITE_UDATA_IO( 4004 struct ib_uverbs_create_xsrq, 4005 struct ib_uverbs_create_srq_resp), 4006 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4007 DECLARE_UVERBS_WRITE( 4008 IB_USER_VERBS_CMD_DESTROY_SRQ, 4009 ib_uverbs_destroy_srq, 4010 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4011 struct ib_uverbs_destroy_srq_resp), 4012 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4013 DECLARE_UVERBS_WRITE( 4014 IB_USER_VERBS_CMD_MODIFY_SRQ, 4015 ib_uverbs_modify_srq, 4016 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4017 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4018 DECLARE_UVERBS_WRITE( 4019 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4020 ib_uverbs_post_srq_recv, 4021 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4022 struct ib_uverbs_post_srq_recv_resp), 4023 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4024 DECLARE_UVERBS_WRITE( 4025 IB_USER_VERBS_CMD_QUERY_SRQ, 4026 ib_uverbs_query_srq, 4027 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4028 struct ib_uverbs_query_srq_resp), 4029 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4030 4031 DECLARE_UVERBS_OBJECT( 4032 UVERBS_OBJECT_XRCD, 4033 DECLARE_UVERBS_WRITE( 4034 IB_USER_VERBS_CMD_CLOSE_XRCD, 4035 ib_uverbs_close_xrcd, 4036 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)), 4037 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4038 ib_uverbs_open_qp, 4039 UAPI_DEF_WRITE_UDATA_IO( 4040 struct ib_uverbs_open_qp, 4041 struct ib_uverbs_create_qp_resp)), 4042 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4043 ib_uverbs_open_xrcd, 4044 UAPI_DEF_WRITE_UDATA_IO( 4045 struct ib_uverbs_open_xrcd, 4046 struct ib_uverbs_open_xrcd_resp)), 4047 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd), 4048 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)), 4049 4050 {}, 4051 }; 4052